- Linux-kselftest-mirror - lists.linaro.org

[PATCH 0/2] selftests/mm: fix deadlock after pthread_create

by Edward Liaw

On Android arm, pthread_create followed by a fork caused a deadlock in the case where the fork required work to be completed by the created thread. Updated the synchronization primitive to use pthread_barrier instead of atomic_bool. Applied the same fix to the wp-fork-with-event test. Edward Liaw (2): selftests/mm: replace atomic_bool with pthread_barrier_t selftests/mm: fix deadlock for fork after pthread_create on ARM tools/testing/selftests/mm/uffd-common.c | 5 +++-- tools/testing/selftests/mm/uffd-common.h | 3 +-- tools/testing/selftests/mm/uffd-unit-tests.c | 21 ++++++++++++++------ 3 files changed, 19 insertions(+), 10 deletions(-) -- 2.46.1.824.gd892dcdcdd-goog

8 months, 2 weeks

4
6
0 0

[PATCH] kunit: tool: catch warnings generated by the kernel

by Jason Gunthorpe

If the kunit being run generates a WARN for some reason kunit.py ignores it and declares the tested PASSED. This is very much not desirable, as tests that are hitting WARN's are probably actually failing. Take the simple approach to reducing this by setting panic_on_warn when running the kernel. The kernel crashes and kunit.py shows the WARN and reports the test fails. Signed-off-by: Jason Gunthorpe <jgg(a)nvidia.com> --- tools/testing/kunit/kunit_kernel.py | 2 ++ 1 file changed, 2 insertions(+) I saw there was an earlier series working to make tests that deliberately made WARNs not do that, so this would be consistent with that idea, tests should not make WARNs, and WARNs should not be ignored.. diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py index 61931c4926fd66..7a4228568dd73c 100644 --- a/tools/testing/kunit/kunit_kernel.py +++ b/tools/testing/kunit/kunit_kernel.py @@ -342,6 +342,8 @@ class LinuxSourceTree: if filter_action: args.append('kunit.filter_action=' + filter_action) args.append('kunit.enable=1') + args.append('panic_on_warn=1') + args.append('panic=-1') process = self._ops.start(args, build_dir) assert process.stdout is not None # tell mypy it's set base-commit: 2872987b1d009df556c0061ecdeede6a5f9bf42c -- 2.46.2

8 months, 2 weeks

1
0
0 0

[PATCH 0/2] selftest: rtc: Add rtc feature detection and rtc file check

by Joseph Jang

1. In order to make rtctest more explicit and robust, we propose to use RTC_PARAM_GET ioctl interface to check rtc alarm feature state before running alarm related tests. 2. The rtctest requires the read permission on /dev/rtc0. The rtctest will be skipped if the /dev/rtc0 is not readable. Joseph Jang (2): selftest: rtc: Add to check rtc alarm status for alarm related test selftest: rtc: Check if could access /dev/rtc0 before testing tools/testing/selftests/rtc/Makefile | 2 +- tools/testing/selftests/rtc/rtctest.c | 71 ++++++++++++++++++++++++++- 2 files changed, 71 insertions(+), 2 deletions(-) -- 2.34.1

8 months, 2 weeks

3
15
0 0

[PATCH v9 9/9] selftests/pcie_bwctrl: Create selftests

by Ilpo Järvinen

Create selftests for PCIe BW control through the PCIe cooling device sysfs interface. First, the BW control selftest finds the PCIe Port to test with. By default, the PCIe Port with the highest Link Speed is selected but another PCIe Port can be provided with -d parameter. The actual test steps the cur_state of the cooling device one-by-one from max_state to what the cur_state was initially. The speed change is confirmed by observing the current_link_speed for the corresponding PCIe Port. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/pcie_bwctrl/Makefile | 2 + .../pcie_bwctrl/set_pcie_cooling_state.sh | 122 ++++++++++++++++++ .../selftests/pcie_bwctrl/set_pcie_speed.sh | 67 ++++++++++ 5 files changed, 193 insertions(+) create mode 100644 tools/testing/selftests/pcie_bwctrl/Makefile create mode 100755 tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh create mode 100755 tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh diff --git a/MAINTAINERS b/MAINTAINERS index 393ed7ce5ea1..d7ffef4382df 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17940,6 +17940,7 @@ S: Supported F: drivers/pci/pcie/bwctrl.c F: drivers/thermal/pcie_cooling.c F: include/linux/pci-bwctrl.h +F: tools/testing/selftests/pcie_bwctrl/ PCIE DRIVER FOR AMAZON ANNAPURNA LABS M: Jonathan Chocron <jonnyc(a)amazon.com> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..7181756f47ff 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -72,6 +72,7 @@ TARGETS += net/packetdrill TARGETS += net/rds TARGETS += net/tcp_ao TARGETS += nsfs +TARGETS += pcie_bwctrl TARGETS += perf_events TARGETS += pidfd TARGETS += pid_namespace diff --git a/tools/testing/selftests/pcie_bwctrl/Makefile b/tools/testing/selftests/pcie_bwctrl/Makefile new file mode 100644 index 000000000000..3e84e26341d1 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/Makefile @@ -0,0 +1,2 @@ +TEST_PROGS = set_pcie_cooling_state.sh +include ../lib.mk diff --git a/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh b/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh new file mode 100755 index 000000000000..9df606552af3 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh @@ -0,0 +1,122 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later + +SYSFS= +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +retval=0 +skipmsg="skip all tests:" + +PCIEPORTTYPE="PCIe_Port_Link_Speed" + +prerequisite() +{ + local ports + + if [ $UID != 0 ]; then + echo $skipmsg must be run as root >&2 + exit $ksft_skip + fi + + SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'` + + if [ ! -d "$SYSFS" ]; then + echo $skipmsg sysfs is not mounted >&2 + exit $ksft_skip + fi + + if ! ls $SYSFS/class/thermal/cooling_device* > /dev/null 2>&1; then + echo $skipmsg thermal cooling devices missing >&2 + exit $ksft_skip + fi + + ports=`grep -e "^$PCIEPORTTYPE" $SYSFS/class/thermal/cooling_device*/type | wc -l` + if [ $ports -eq 0 ]; then + echo $skipmsg pcie cooling devices missing >&2 + exit $ksft_skip + fi +} + +testport= +find_pcie_port() +{ + local patt="$1" + local pcieports + local max + local cur + local delta + local bestdelta=-1 + + pcieports=`grep -l -F -e "$patt" /sys/class/thermal/cooling_device*/type` + if [ -z "$pcieports" ]; then + return + fi + pcieports=${pcieports//\/type/} + # Find the port with the highest PCIe Link Speed + for port in $pcieports; do + max=`cat $port/max_state` + cur=`cat $port/cur_state` + delta=$((max-cur)) + if [ $delta -gt $bestdelta ]; then + testport="$port" + bestdelta=$delta + fi + done +} + +sysfspcidev= +find_sysfs_pci_dev() +{ + local typefile="$1/type" + local pcidir + + pcidir="$SYSFS/bus/pci/devices/`sed -e "s|^${PCIEPORTTYPE}_||g" $typefile`" + + if [ -r "$pcidir/current_link_speed" ]; then + sysfspcidev="$pcidir/current_link_speed" + fi +} + +usage() +{ + echo "Usage $0 [ -d dev ]" + echo -e "\t-d: PCIe port BDF string (e.g., 0000:00:04.0)" +} + +pattern="$PCIEPORTTYPE" +parse_arguments() +{ + while getopts d:h opt; do + case $opt in + h) + usage "$0" + exit 0 + ;; + d) + pattern="$PCIEPORTTYPE_$OPTARG" + ;; + *) + usage "$0" + exit 0 + ;; + esac + done +} + +parse_arguments "$@" +prerequisite +find_pcie_port "$pattern" +if [ -z "$testport" ]; then + echo $skipmsg "pcie cooling device not found from sysfs" >&2 + exit $ksft_skip +fi +find_sysfs_pci_dev "$testport" +if [ -z "$sysfspcidev" ]; then + echo $skipmsg "PCIe port device not found from sysfs" >&2 + exit $ksft_skip +fi + +./set_pcie_speed.sh "$testport" "$sysfspcidev" +retval=$? + +exit $retval diff --git a/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh b/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh new file mode 100755 index 000000000000..584596949312 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh @@ -0,0 +1,67 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later + +set -e + +TESTNAME=set_pcie_speed + +declare -a PCIELINKSPEED=( + "2.5 GT/s PCIe" + "5.0 GT/s PCIe" + "8.0 GT/s PCIe" + "16.0 GT/s PCIe" + "32.0 GT/s PCIe" + "64.0 GT/s PCIe" +) + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +retval=0 + +coolingdev="$1" +statefile="$coolingdev/cur_state" +maxfile="$coolingdev/max_state" +linkspeedfile="$2" + +oldstate=`cat $statefile` +maxstate=`cat $maxfile` + +set_state() +{ + local state=$1 + local linkspeed + local expected_linkspeed + + echo $state > $statefile + + sleep 1 + + linkspeed="`cat $linkspeedfile`" + expected_linkspeed=$((maxstate-state)) + expected_str="${PCIELINKSPEED[$expected_linkspeed]}" + if [ ! "${expected_str}" = "${linkspeed}" ]; then + echo "$TESTNAME failed: expected: ${expected_str}; got ${linkspeed}" + retval=1 + fi +} + +cleanup_skip () +{ + set_state $oldstate + exit $ksft_skip +} + +trap cleanup_skip EXIT + +echo "$TESTNAME: testing states $maxstate .. $oldstate with $coolingdev" +for i in $(seq $maxstate -1 $oldstate); do + set_state "$i" +done + +trap EXIT +if [ $retval -eq 0 ]; then + echo "$TESTNAME [PASS]" +else + echo "$TESTNAME [FAIL]" +fi +exit $retval -- 2.39.5

8 months, 2 weeks

1
0
0 0

[PATCH] selftests: netfilter: remove unused rplnlh parameter

by Liu Jing

The rplnlh parameter is not used in many functions, so delete it. Signed-off-by: Liu Jing <liujing(a)cmss.chinamobile.com> --- tools/testing/selftests/net/netfilter/conntrack_dump_flush.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c index bd9317bf5ada..e03ddc60b5d4 100644 --- a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c +++ b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c @@ -96,7 +96,6 @@ static int conntrack_data_insert(struct mnl_socket *sock, struct nlmsghdr *nlh, uint16_t zone) { char buf[MNL_SOCKET_BUFFER_SIZE]; - struct nlmsghdr *rplnlh; unsigned int portid; int err, ret; @@ -212,7 +211,7 @@ static int count_entries(const struct nlmsghdr *nlh, void *data) static int conntracK_count_zone(struct mnl_socket *sock, uint16_t zone) { char buf[MNL_SOCKET_BUFFER_SIZE]; - struct nlmsghdr *nlh, *rplnlh; + struct nlmsghdr *nlh; struct nfgenmsg *nfh; struct nlattr *nest; unsigned int portid; @@ -259,7 +258,7 @@ static int conntracK_count_zone(struct mnl_socket *sock, uint16_t zone) static int conntrack_flush_zone(struct mnl_socket *sock, uint16_t zone) { char buf[MNL_SOCKET_BUFFER_SIZE]; - struct nlmsghdr *nlh, *rplnlh; + struct nlmsghdr *nlh; struct nfgenmsg *nfh; struct nlattr *nest; unsigned int portid; -- 2.27.0

8 months, 2 weeks

2
1
0 0

[PATCH net-next v22 11/14] mm: page_frag: add testing for the newly added prepare API

by Yunsheng Lin

Add testing for the newly added prepare API, for both aligned and non-aligned API, also probe API is also tested along with prepare API. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- .../selftests/mm/page_frag/page_frag_test.c | 76 +++++++++++++++++-- tools/testing/selftests/mm/run_vmtests.sh | 4 + tools/testing/selftests/mm/test_page_frag.sh | 27 +++++++ 3 files changed, 102 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index e806c1866e36..1e47e9ad66f0 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -32,6 +32,10 @@ static bool test_align; module_param(test_align, bool, 0); MODULE_PARM_DESC(test_align, "use align API for testing"); +static bool test_prepare; +module_param(test_prepare, bool, 0); +MODULE_PARM_DESC(test_prepare, "use prepare API for testing"); + static int test_alloc_len = 2048; module_param(test_alloc_len, int, 0); MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); @@ -74,6 +78,21 @@ static int page_frag_pop_thread(void *arg) return 0; } +static void frag_frag_test_commit(struct page_frag_cache *nc, + struct page_frag *prepare_pfrag, + struct page_frag *probe_pfrag, + unsigned int used_sz) +{ + if (prepare_pfrag->page != probe_pfrag->page || + prepare_pfrag->offset != probe_pfrag->offset || + prepare_pfrag->size != probe_pfrag->size) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong probed info\n"); + } + + page_frag_commit(nc, prepare_pfrag, used_sz); +} + static int page_frag_push_thread(void *arg) { struct ptr_ring *ring = arg; @@ -86,15 +105,61 @@ static int page_frag_push_thread(void *arg) int ret; if (test_align) { - va = page_frag_alloc_align(&test_nc, test_alloc_len, - GFP_KERNEL, SMP_CACHE_BYTES); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare_align(&test_nc, + test_alloc_len, + &prepare_frag, + GFP_KERNEL, + SMP_CACHE_BYTES); + + probe_va = __page_frag_alloc_refill_probe_align(&test_nc, + test_alloc_len, + &probe_frag, + -SMP_CACHE_BYTES); + if (va != probe_va) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong va\n"); + } + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc_align(&test_nc, + test_alloc_len, + GFP_KERNEL, + SMP_CACHE_BYTES); + } if ((unsigned long)va & (SMP_CACHE_BYTES - 1)) { force_exit = true; WARN_ONCE(true, TEST_FAILED_PREFIX "unaligned va returned\n"); } } else { - va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare(&test_nc, test_alloc_len, + &prepare_frag, GFP_KERNEL); + + probe_va = page_frag_alloc_refill_probe(&test_nc, test_alloc_len, + &probe_frag); + + if (va != probe_va) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong va\n"); + } + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } } if (!va) @@ -176,8 +241,9 @@ static int __init page_frag_test_init(void) } duration = (u64)ktime_us_delta(ktime_get(), start); - pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, - test_align ? "aligned" : "non-aligned", duration); + pr_info("%d of iterations for %s %s API testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", + test_prepare ? "prepare" : "alloc", duration); out: ptr_ring_cleanup(&ptr_ring, NULL); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 2c5394584af4..f6ff9080a6f2 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -464,6 +464,10 @@ CATEGORY="page_frag" run_test ./test_page_frag.sh aligned CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned_prepare + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned_prepare + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh index f55b105084cf..1c757fd11844 100755 --- a/tools/testing/selftests/mm/test_page_frag.sh +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -43,6 +43,8 @@ check_test_failed_prefix() { SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" +NONALIGNED_PREPARE_PARAM="$NONALIGNED_PARAM test_prepare=1" +ALIGNED_PREPARE_PARAM="$ALIGNED_PARAM test_prepare=1" check_test_requirements() { @@ -77,6 +79,20 @@ run_aligned_check() insmod $DRIVER $ALIGNED_PARAM > /dev/null 2>&1 } +run_nonaligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast nonaligned prepare API is." + + insmod $DRIVER $NONALIGNED_PREPARE_PARAM > /dev/null 2>&1 +} + +run_aligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast aligned prepare API is." + + insmod $DRIVER $ALIGNED_PREPARE_PARAM > /dev/null 2>&1 +} + run_smoke_check() { echo "Run smoke test." @@ -87,6 +103,7 @@ run_smoke_check() usage() { echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "[ aligned_prepare ] | [ nonaligned_prepare ] | " echo "manual parameters" echo echo "Valid tests and parameters:" @@ -107,6 +124,12 @@ usage() echo "# Performance testing for aligned alloc API" echo "$0 aligned" echo + echo "# Performance testing for nonaligned prepare API" + echo "$0 nonaligned_prepare" + echo + echo "# Performance testing for aligned prepare API" + echo "$0 aligned_prepare" + echo exit 0 } @@ -158,6 +181,10 @@ function run_test() run_nonaligned_check elif [[ "$1" = "aligned" ]]; then run_aligned_check + elif [[ "$1" = "nonaligned_prepare" ]]; then + run_nonaligned_prepare_check + elif [[ "$1" = "aligned_prepare" ]]; then + run_aligned_prepare_check else run_manual_check $@ fi -- 2.33.0

8 months, 2 weeks

1
0
0 0

[PATCH net-next v22 04/14] mm: page_frag: avoid caller accessing 'page_frag_cache' directly

by Yunsheng Lin

Use appropriate frag_page API instead of caller accessing 'page_frag_cache' directly. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> Acked-by: Chuck Lever <chuck.lever(a)oracle.com> --- drivers/vhost/net.c | 2 +- include/linux/page_frag_cache.h | 10 ++++++++++ net/core/skbuff.c | 6 +++--- net/rxrpc/conn_object.c | 4 +--- net/rxrpc/local_object.c | 4 +--- net/sunrpc/svcsock.c | 6 ++---- tools/testing/selftests/mm/page_frag/page_frag_test.c | 2 +- 7 files changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index f16279351db5..9ad37c012189 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1325,7 +1325,7 @@ static int vhost_net_open(struct inode *inode, struct file *f) vqs[VHOST_NET_VQ_RX]); f->private_data = n; - n->pf_cache.va = NULL; + page_frag_cache_init(&n->pf_cache); return 0; } diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h index 67ac8626ed9b..0a52f7a179c8 100644 --- a/include/linux/page_frag_cache.h +++ b/include/linux/page_frag_cache.h @@ -7,6 +7,16 @@ #include <linux/mm_types_task.h> #include <linux/types.h> +static inline void page_frag_cache_init(struct page_frag_cache *nc) +{ + nc->va = NULL; +} + +static inline bool page_frag_cache_is_pfmemalloc(struct page_frag_cache *nc) +{ + return !!nc->pfmemalloc; +} + void page_frag_cache_drain(struct page_frag_cache *nc); void __page_frag_cache_drain(struct page *page, unsigned int count); void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 00afeb90c23a..6841e61a6bd0 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -753,14 +753,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (in_hardirq() || irqs_disabled()) { nc = this_cpu_ptr(&netdev_alloc_cache); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); } else { local_bh_disable(); local_lock_nested_bh(&napi_alloc_cache.bh_lock); nc = this_cpu_ptr(&napi_alloc_cache.page); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); local_unlock_nested_bh(&napi_alloc_cache.bh_lock); local_bh_enable(); @@ -850,7 +850,7 @@ struct sk_buff *napi_alloc_skb(struct napi_struct *napi, unsigned int len) len = SKB_HEAD_ALIGN(len); data = page_frag_alloc(&nc->page, len, gfp_mask); - pfmemalloc = nc->page.pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(&nc->page); } local_unlock_nested_bh(&napi_alloc_cache.bh_lock); diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 1539d315afe7..694c4df7a1a3 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -337,9 +337,7 @@ static void rxrpc_clean_up_connection(struct work_struct *work) */ rxrpc_purge_queue(&conn->rx_queue); - if (conn->tx_data_alloc.va) - __page_frag_cache_drain(virt_to_page(conn->tx_data_alloc.va), - conn->tx_data_alloc.pagecnt_bias); + page_frag_cache_drain(&conn->tx_data_alloc); call_rcu(&conn->rcu, rxrpc_rcu_free_connection); } diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index f9623ace2201..2792d2304605 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -452,9 +452,7 @@ void rxrpc_destroy_local(struct rxrpc_local *local) #endif rxrpc_purge_queue(&local->rx_queue); rxrpc_purge_client_connections(local); - if (local->tx_alloc.va) - __page_frag_cache_drain(virt_to_page(local->tx_alloc.va), - local->tx_alloc.pagecnt_bias); + page_frag_cache_drain(&local->tx_alloc); } /* diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 825ec5357691..b785425c3315 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1608,7 +1608,6 @@ static void svc_tcp_sock_detach(struct svc_xprt *xprt) static void svc_sock_free(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct page_frag_cache *pfc = &svsk->sk_frag_cache; struct socket *sock = svsk->sk_sock; trace_svcsock_free(svsk, sock); @@ -1618,8 +1617,7 @@ static void svc_sock_free(struct svc_xprt *xprt) sockfd_put(sock); else sock_release(sock); - if (pfc->va) - __page_frag_cache_drain(virt_to_head_page(pfc->va), - pfc->pagecnt_bias); + + page_frag_cache_drain(&svsk->sk_frag_cache); kfree(svsk); } diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 13c44133e009..e806c1866e36 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -126,7 +126,7 @@ static int __init page_frag_test_init(void) u64 duration; int ret; - test_nc.va = NULL; + page_frag_cache_init(&test_nc); atomic_set(&nthreads, 2); init_completion(&wait); -- 2.33.0

8 months, 2 weeks

1
0
0 0

[PATCH net-next v22 02/14] mm: move the page fragment allocator from page_alloc into its own file

by Yunsheng Lin

Inspired by [1], move the page fragment allocator from page_alloc into its own c file and header file, as we are about to make more change for it to replace another page_frag implementation in sock.c As this patchset is going to replace 'struct page_frag' with 'struct page_frag_cache' in sched.h, including page_frag_cache.h in sched.h has a compiler error caused by interdependence between mm_types.h and mm.h for asm-offsets.c, see [2]. So avoid the compiler error by moving 'struct page_frag_cache' to mm_types_task.h as suggested by Alexander, see [3]. 1. https://lore.kernel.org/all/20230411160902.4134381-3-dhowells@redhat.com/ 2. https://lore.kernel.org/all/15623dac-9358-4597-b3ee-3694a5956920@gmail.com/ 3. https://lore.kernel.org/all/CAKgT0UdH1yD=LSCXFJ=YM_aiA4OomD-2wXykO42bizaWMt… CC: David Howells <dhowells(a)redhat.com> CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Acked-by: Andrew Morton <akpm(a)linux-foundation.org> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- include/linux/gfp.h | 22 --- include/linux/mm_types.h | 18 --- include/linux/mm_types_task.h | 18 +++ include/linux/page_frag_cache.h | 31 ++++ include/linux/skbuff.h | 1 + mm/Makefile | 1 + mm/page_alloc.c | 136 ---------------- mm/page_frag_cache.c | 145 ++++++++++++++++++ .../selftests/mm/page_frag/page_frag_test.c | 2 +- 9 files changed, 197 insertions(+), 177 deletions(-) create mode 100644 include/linux/page_frag_cache.h create mode 100644 mm/page_frag_cache.c diff --git a/include/linux/gfp.h b/include/linux/gfp.h index a951de920e20..a0a6d25f883f 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -371,28 +371,6 @@ __meminit void *alloc_pages_exact_nid_noprof(int nid, size_t size, gfp_t gfp_mas extern void __free_pages(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order); -struct page_frag_cache; -void page_frag_cache_drain(struct page_frag_cache *nc); -extern void __page_frag_cache_drain(struct page *page, unsigned int count); -void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, - gfp_t gfp_mask, unsigned int align_mask); - -static inline void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align) -{ - WARN_ON_ONCE(!is_power_of_2(align)); - return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); -} - -static inline void *page_frag_alloc(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask) -{ - return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); -} - -extern void page_frag_free(void *addr); - #define __free_page(page) __free_pages((page), 0) #define free_page(addr) free_pages((addr), 0) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 6e3bdf8e38bc..92314ef2d978 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -521,9 +521,6 @@ static_assert(sizeof(struct ptdesc) <= sizeof(struct page)); */ #define STRUCT_PAGE_MAX_SHIFT (order_base_2(sizeof(struct page))) -#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) -#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) - /* * page_private can be used on tail pages. However, PagePrivate is only * checked by the VM on the head page. So page_private on the tail pages @@ -542,21 +539,6 @@ static inline void *folio_get_private(struct folio *folio) return folio->private; } -struct page_frag_cache { - void * va; -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - __u16 offset; - __u16 size; -#else - __u32 offset; -#endif - /* we maintain a pagecount bias, so that we dont dirty cache line - * containing page->_refcount every time we allocate a fragment. - */ - unsigned int pagecnt_bias; - bool pfmemalloc; -}; - typedef unsigned long vm_flags_t; /* diff --git a/include/linux/mm_types_task.h b/include/linux/mm_types_task.h index bff5706b76e1..0ac6daebdd5c 100644 --- a/include/linux/mm_types_task.h +++ b/include/linux/mm_types_task.h @@ -8,6 +8,7 @@ * (These are defined separately to decouple sched.h from mm_types.h as much as possible.) */ +#include <linux/align.h> #include <linux/types.h> #include <asm/page.h> @@ -43,6 +44,23 @@ struct page_frag { #endif }; +#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) +#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) +struct page_frag_cache { + void *va; +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + __u16 offset; + __u16 size; +#else + __u32 offset; +#endif + /* we maintain a pagecount bias, so that we dont dirty cache line + * containing page->_refcount every time we allocate a fragment. + */ + unsigned int pagecnt_bias; + bool pfmemalloc; +}; + /* Track pages that require TLB flushes */ struct tlbflush_unmap_batch { #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h new file mode 100644 index 000000000000..67ac8626ed9b --- /dev/null +++ b/include/linux/page_frag_cache.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_PAGE_FRAG_CACHE_H +#define _LINUX_PAGE_FRAG_CACHE_H + +#include <linux/log2.h> +#include <linux/mm_types_task.h> +#include <linux/types.h> + +void page_frag_cache_drain(struct page_frag_cache *nc); +void __page_frag_cache_drain(struct page *page, unsigned int count); +void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, + gfp_t gfp_mask, unsigned int align_mask); + +static inline void *page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align) +{ + WARN_ON_ONCE(!is_power_of_2(align)); + return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); +} + +static inline void *page_frag_alloc(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask) +{ + return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); +} + +void page_frag_free(void *addr); + +#endif diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 48f1e0fa2a13..7adca0fa2602 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -31,6 +31,7 @@ #include <linux/in6.h> #include <linux/if_packet.h> #include <linux/llist.h> +#include <linux/page_frag_cache.h> #include <net/flow.h> #if IS_ENABLED(CONFIG_NF_CONNTRACK) #include <linux/netfilter/nf_conntrack_common.h> diff --git a/mm/Makefile b/mm/Makefile index d5639b036166..dba52bb0da8a 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -65,6 +65,7 @@ page-alloc-$(CONFIG_SHUFFLE_PAGE_ALLOCATOR) += shuffle.o memory-hotplug-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o obj-y += page-alloc.o +obj-y += page_frag_cache.o obj-y += init-mm.o obj-y += memblock.o obj-y += $(memory-hotplug-y) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8afab64814dc..6ca2abce857b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4836,142 +4836,6 @@ void free_pages(unsigned long addr, unsigned int order) EXPORT_SYMBOL(free_pages); -/* - * Page Fragment: - * An arbitrary-length arbitrary-offset area of memory which resides - * within a 0 or higher order page. Multiple fragments within that page - * are individually refcounted, in the page's reference counter. - * - * The page_frag functions below provide a simple allocation framework for - * page fragments. This is used by the network stack and network device - * drivers to provide a backing region of memory for use as either an - * sk_buff->head, or to be used in the "frags" portion of skb_shared_info. - */ -static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, - gfp_t gfp_mask) -{ - struct page *page = NULL; - gfp_t gfp = gfp_mask; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | - __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; - page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, - PAGE_FRAG_CACHE_MAX_ORDER); - nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; -#endif - if (unlikely(!page)) - page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); - - nc->va = page ? page_address(page) : NULL; - - return page; -} - -void page_frag_cache_drain(struct page_frag_cache *nc) -{ - if (!nc->va) - return; - - __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); - nc->va = NULL; -} -EXPORT_SYMBOL(page_frag_cache_drain); - -void __page_frag_cache_drain(struct page *page, unsigned int count) -{ - VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); - - if (page_ref_sub_and_test(page, count)) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(__page_frag_cache_drain); - -void *__page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask) -{ - unsigned int size = PAGE_SIZE; - struct page *page; - int offset; - - if (unlikely(!nc->va)) { -refill: - page = __page_frag_cache_refill(nc, gfp_mask); - if (!page) - return NULL; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* Even if we own the page, we do not use atomic_set(). - * This would break get_page_unless_zero() users. - */ - page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); - - /* reset page count bias and offset to start of new frag */ - nc->pfmemalloc = page_is_pfmemalloc(page); - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - nc->offset = size; - } - - offset = nc->offset - fragsz; - if (unlikely(offset < 0)) { - page = virt_to_page(nc->va); - - if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) - goto refill; - - if (unlikely(nc->pfmemalloc)) { - free_unref_page(page, compound_order(page)); - goto refill; - } - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* OK, page count is 0, we can safely set it */ - set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); - - /* reset page count bias and offset to start of new frag */ - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - offset = size - fragsz; - if (unlikely(offset < 0)) { - /* - * The caller is trying to allocate a fragment - * with fragsz > PAGE_SIZE but the cache isn't big - * enough to satisfy the request, this may - * happen in low memory conditions. - * We don't release the cache page because - * it could make memory pressure worse - * so we simply return NULL here. - */ - return NULL; - } - } - - nc->pagecnt_bias--; - offset &= align_mask; - nc->offset = offset; - - return nc->va + offset; -} -EXPORT_SYMBOL(__page_frag_alloc_align); - -/* - * Frees a page fragment allocated out of either a compound or order 0 page. - */ -void page_frag_free(void *addr) -{ - struct page *page = virt_to_head_page(addr); - - if (unlikely(put_page_testzero(page))) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(page_frag_free); - static void *make_alloc_exact(unsigned long addr, unsigned int order, size_t size) { diff --git a/mm/page_frag_cache.c b/mm/page_frag_cache.c new file mode 100644 index 000000000000..609a485cd02a --- /dev/null +++ b/mm/page_frag_cache.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Page fragment allocator + * + * Page Fragment: + * An arbitrary-length arbitrary-offset area of memory which resides within a + * 0 or higher order page. Multiple fragments within that page are + * individually refcounted, in the page's reference counter. + * + * The page_frag functions provide a simple allocation framework for page + * fragments. This is used by the network stack and network device drivers to + * provide a backing region of memory for use as either an sk_buff->head, or to + * be used in the "frags" portion of skb_shared_info. + */ + +#include <linux/export.h> +#include <linux/gfp_types.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/page_frag_cache.h> +#include "internal.h" + +static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, + gfp_t gfp_mask) +{ + struct page *page = NULL; + gfp_t gfp = gfp_mask; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | + __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; + page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, + PAGE_FRAG_CACHE_MAX_ORDER); + nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; +#endif + if (unlikely(!page)) + page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); + + nc->va = page ? page_address(page) : NULL; + + return page; +} + +void page_frag_cache_drain(struct page_frag_cache *nc) +{ + if (!nc->va) + return; + + __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); + nc->va = NULL; +} +EXPORT_SYMBOL(page_frag_cache_drain); + +void __page_frag_cache_drain(struct page *page, unsigned int count) +{ + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + + if (page_ref_sub_and_test(page, count)) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(__page_frag_cache_drain); + +void *__page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask) +{ + unsigned int size = PAGE_SIZE; + struct page *page; + int offset; + + if (unlikely(!nc->va)) { +refill: + page = __page_frag_cache_refill(nc, gfp_mask); + if (!page) + return NULL; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* Even if we own the page, we do not use atomic_set(). + * This would break get_page_unless_zero() users. + */ + page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); + + /* reset page count bias and offset to start of new frag */ + nc->pfmemalloc = page_is_pfmemalloc(page); + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + nc->offset = size; + } + + offset = nc->offset - fragsz; + if (unlikely(offset < 0)) { + page = virt_to_page(nc->va); + + if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) + goto refill; + + if (unlikely(nc->pfmemalloc)) { + free_unref_page(page, compound_order(page)); + goto refill; + } + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* OK, page count is 0, we can safely set it */ + set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); + + /* reset page count bias and offset to start of new frag */ + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + offset = size - fragsz; + if (unlikely(offset < 0)) { + /* + * The caller is trying to allocate a fragment + * with fragsz > PAGE_SIZE but the cache isn't big + * enough to satisfy the request, this may + * happen in low memory conditions. + * We don't release the cache page because + * it could make memory pressure worse + * so we simply return NULL here. + */ + return NULL; + } + } + + nc->pagecnt_bias--; + offset &= align_mask; + nc->offset = offset; + + return nc->va + offset; +} +EXPORT_SYMBOL(__page_frag_alloc_align); + +/* + * Frees a page fragment allocated out of either a compound or order 0 page. + */ +void page_frag_free(void *addr) +{ + struct page *page = virt_to_head_page(addr); + + if (unlikely(put_page_testzero(page))) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(page_frag_free); diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 912d97b99107..13c44133e009 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -6,12 +6,12 @@ * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> */ -#include <linux/mm.h> #include <linux/module.h> #include <linux/cpumask.h> #include <linux/completion.h> #include <linux/ptr_ring.h> #include <linux/kthread.h> +#include <linux/page_frag_cache.h> #define TEST_FAILED_PREFIX "page_frag_test failed: " -- 2.33.0

8 months, 2 weeks

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[PATCH net-next v22 01/14] mm: page_frag: add a test module for page_frag

by Yunsheng Lin

The testing is done by ensuring that the fragment allocated from a frag_frag_cache instance is pushed into a ptr_ring instance in a kthread binded to a specified cpu, and a kthread binded to a specified cpu will pop the fragment from the ptr_ring and free the fragment. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- tools/testing/selftests/mm/Makefile | 3 + tools/testing/selftests/mm/page_frag/Makefile | 18 ++ .../selftests/mm/page_frag/page_frag_test.c | 198 ++++++++++++++++++ tools/testing/selftests/mm/run_vmtests.sh | 8 + tools/testing/selftests/mm/test_page_frag.sh | 175 ++++++++++++++++ 5 files changed, 402 insertions(+) create mode 100644 tools/testing/selftests/mm/page_frag/Makefile create mode 100644 tools/testing/selftests/mm/page_frag/page_frag_test.c create mode 100755 tools/testing/selftests/mm/test_page_frag.sh diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index 02e1204971b0..acec529baaca 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -36,6 +36,8 @@ MAKEFLAGS += --no-builtin-rules CFLAGS = -Wall -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES) LDLIBS = -lrt -lpthread -lm +TEST_GEN_MODS_DIR := page_frag + TEST_GEN_FILES = cow TEST_GEN_FILES += compaction_test TEST_GEN_FILES += gup_longterm @@ -126,6 +128,7 @@ TEST_FILES += test_hmm.sh TEST_FILES += va_high_addr_switch.sh TEST_FILES += charge_reserved_hugetlb.sh TEST_FILES += hugetlb_reparenting_test.sh +TEST_FILES += test_page_frag.sh # required by charge_reserved_hugetlb.sh TEST_FILES += write_hugetlb_memory.sh diff --git a/tools/testing/selftests/mm/page_frag/Makefile b/tools/testing/selftests/mm/page_frag/Makefile new file mode 100644 index 000000000000..58dda74d50a3 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/Makefile @@ -0,0 +1,18 @@ +PAGE_FRAG_TEST_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST))))) +KDIR ?= $(abspath $(PAGE_FRAG_TEST_DIR)/../../../../..) + +ifeq ($(V),1) +Q = +else +Q = @ +endif + +MODULES = page_frag_test.ko + +obj-m += page_frag_test.o + +all: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) modules + +clean: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) clean diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c new file mode 100644 index 000000000000..912d97b99107 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -0,0 +1,198 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Test module for page_frag cache + * + * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> + */ + +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/cpumask.h> +#include <linux/completion.h> +#include <linux/ptr_ring.h> +#include <linux/kthread.h> + +#define TEST_FAILED_PREFIX "page_frag_test failed: " + +static struct ptr_ring ptr_ring; +static int nr_objs = 512; +static atomic_t nthreads; +static struct completion wait; +static struct page_frag_cache test_nc; +static int test_popped; +static int test_pushed; +static bool force_exit; + +static int nr_test = 2000000; +module_param(nr_test, int, 0); +MODULE_PARM_DESC(nr_test, "number of iterations to test"); + +static bool test_align; +module_param(test_align, bool, 0); +MODULE_PARM_DESC(test_align, "use align API for testing"); + +static int test_alloc_len = 2048; +module_param(test_alloc_len, int, 0); +MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); + +static int test_push_cpu; +module_param(test_push_cpu, int, 0); +MODULE_PARM_DESC(test_push_cpu, "test cpu for pushing fragment"); + +static int test_pop_cpu; +module_param(test_pop_cpu, int, 0); +MODULE_PARM_DESC(test_pop_cpu, "test cpu for popping fragment"); + +static int page_frag_pop_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag pop test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_popped < nr_test) { + void *obj = __ptr_ring_consume(ring); + + if (obj) { + test_popped++; + page_frag_free(obj); + } else { + if (force_exit) + break; + + cond_resched(); + } + } + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + pr_info("page_frag pop test thread exits on cpu %d\n", + smp_processor_id()); + + return 0; +} + +static int page_frag_push_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag push test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_pushed < nr_test && !force_exit) { + void *va; + int ret; + + if (test_align) { + va = page_frag_alloc_align(&test_nc, test_alloc_len, + GFP_KERNEL, SMP_CACHE_BYTES); + + if ((unsigned long)va & (SMP_CACHE_BYTES - 1)) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "unaligned va returned\n"); + } + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } + + if (!va) + continue; + + ret = __ptr_ring_produce(ring, va); + if (ret) { + page_frag_free(va); + cond_resched(); + } else { + test_pushed++; + } + } + + pr_info("page_frag push test thread exits on cpu %d\n", + smp_processor_id()); + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + return 0; +} + +static int __init page_frag_test_init(void) +{ + struct task_struct *tsk_push, *tsk_pop; + int last_pushed = 0, last_popped = 0; + ktime_t start; + u64 duration; + int ret; + + test_nc.va = NULL; + atomic_set(&nthreads, 2); + init_completion(&wait); + + if (test_alloc_len > PAGE_SIZE || test_alloc_len <= 0 || + !cpu_active(test_push_cpu) || !cpu_active(test_pop_cpu)) + return -EINVAL; + + ret = ptr_ring_init(&ptr_ring, nr_objs, GFP_KERNEL); + if (ret) + return ret; + + tsk_push = kthread_create_on_cpu(page_frag_push_thread, &ptr_ring, + test_push_cpu, "page_frag_push"); + if (IS_ERR(tsk_push)) + return PTR_ERR(tsk_push); + + tsk_pop = kthread_create_on_cpu(page_frag_pop_thread, &ptr_ring, + test_pop_cpu, "page_frag_pop"); + if (IS_ERR(tsk_pop)) { + kthread_stop(tsk_push); + return PTR_ERR(tsk_pop); + } + + start = ktime_get(); + wake_up_process(tsk_push); + wake_up_process(tsk_pop); + + pr_info("waiting for test to complete\n"); + + while (!wait_for_completion_timeout(&wait, msecs_to_jiffies(10000))) { + /* exit if there is no progress for push or pop size */ + if (last_pushed == test_pushed || last_popped == test_popped) { + WARN_ONCE(true, TEST_FAILED_PREFIX "no progress\n"); + force_exit = true; + continue; + } + + last_pushed = test_pushed; + last_popped = test_popped; + pr_info("page_frag_test progress: pushed = %d, popped = %d\n", + test_pushed, test_popped); + } + + if (force_exit) { + pr_err(TEST_FAILED_PREFIX "exit with error\n"); + goto out; + } + + duration = (u64)ktime_us_delta(ktime_get(), start); + pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", duration); + +out: + ptr_ring_cleanup(&ptr_ring, NULL); + page_frag_cache_drain(&test_nc); + + return -EAGAIN; +} + +static void __exit page_frag_test_exit(void) +{ +} + +module_init(page_frag_test_init); +module_exit(page_frag_test_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Yunsheng Lin <linyunsheng(a)huawei.com>"); +MODULE_DESCRIPTION("Test module for page_frag"); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index c5797ad1d37b..2c5394584af4 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -75,6 +75,8 @@ separated by spaces: read-only VMAs - mdwe test prctl(PR_SET_MDWE, ...) +- page_frag + test handling of page fragment allocation and freeing example: ./run_vmtests.sh -t "hmm mmap ksm" EOF @@ -456,6 +458,12 @@ CATEGORY="mkdirty" run_test ./mkdirty CATEGORY="mdwe" run_test ./mdwe_test +CATEGORY="page_frag" run_test ./test_page_frag.sh smoke + +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh new file mode 100755 index 000000000000..f55b105084cf --- /dev/null +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -0,0 +1,175 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> +# Copyright (C) 2018 Uladzislau Rezki (Sony) <urezki(a)gmail.com> +# +# This is a test script for the kernel test driver to test the +# correctness and performance of page_frag's implementation. +# Therefore it is just a kernel module loader. You can specify +# and pass different parameters in order to: +# a) analyse performance of page fragment allocations; +# b) stressing and stability check of page_frag subsystem. + +DRIVER="./page_frag/page_frag_test.ko" +CPU_LIST=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) +TEST_CPU_0=$(echo $CPU_LIST | awk '{print $1}') + +if [ $(echo $CPU_LIST | wc -w) -gt 1 ]; then + TEST_CPU_1=$(echo $CPU_LIST | awk '{print $2}') + NR_TEST=100000000 +else + TEST_CPU_1=$TEST_CPU_0 + NR_TEST=1000000 +fi + +# 1 if fails +exitcode=1 + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +check_test_failed_prefix() { + if dmesg | grep -q 'page_frag_test failed:';then + echo "page_frag_test failed, please check dmesg" + exit $exitcode + fi +} + +# +# Static templates for testing of page_frag APIs. +# Also it is possible to pass any supported parameters manually. +# +SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" +NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" +ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" + +check_test_requirements() +{ + uid=$(id -u) + if [ $uid -ne 0 ]; then + echo "$0: Must be run as root" + exit $ksft_skip + fi + + if ! which insmod > /dev/null 2>&1; then + echo "$0: You need insmod installed" + exit $ksft_skip + fi + + if [ ! -f $DRIVER ]; then + echo "$0: You need to compile page_frag_test module" + exit $ksft_skip + fi +} + +run_nonaligned_check() +{ + echo "Run performance tests to evaluate how fast nonaligned alloc API is." + + insmod $DRIVER $NONALIGNED_PARAM > /dev/null 2>&1 +} + +run_aligned_check() +{ + echo "Run performance tests to evaluate how fast aligned alloc API is." + + insmod $DRIVER $ALIGNED_PARAM > /dev/null 2>&1 +} + +run_smoke_check() +{ + echo "Run smoke test." + + insmod $DRIVER $SMOKE_PARAM > /dev/null 2>&1 +} + +usage() +{ + echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "manual parameters" + echo + echo "Valid tests and parameters:" + echo + modinfo $DRIVER + echo + echo "Example usage:" + echo + echo "# Shows help message" + echo "$0" + echo + echo "# Smoke testing" + echo "$0 smoke" + echo + echo "# Performance testing for nonaligned alloc API" + echo "$0 nonaligned" + echo + echo "# Performance testing for aligned alloc API" + echo "$0 aligned" + echo + exit 0 +} + +function validate_passed_args() +{ + VALID_ARGS=`modinfo $DRIVER | awk '/parm:/ {print $2}' | sed 's/:.*//'` + + # + # Something has been passed, check it. + # + for passed_arg in $@; do + key=${passed_arg//=*/} + valid=0 + + for valid_arg in $VALID_ARGS; do + if [[ $key = $valid_arg ]]; then + valid=1 + break + fi + done + + if [[ $valid -ne 1 ]]; then + echo "Error: key is not correct: ${key}" + exit $exitcode + fi + done +} + +function run_manual_check() +{ + # + # Validate passed parameters. If there is wrong one, + # the script exists and does not execute further. + # + validate_passed_args $@ + + echo "Run the test with following parameters: $@" + insmod $DRIVER $@ > /dev/null 2>&1 +} + +function run_test() +{ + if [ $# -eq 0 ]; then + usage + else + if [[ "$1" = "smoke" ]]; then + run_smoke_check + elif [[ "$1" = "nonaligned" ]]; then + run_nonaligned_check + elif [[ "$1" = "aligned" ]]; then + run_aligned_check + else + run_manual_check $@ + fi + fi + + check_test_failed_prefix + + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +check_test_requirements +run_test $@ + +exit 0 -- 2.33.0

8 months, 2 weeks

1
0
0 0

[PATCH v2] kselftests: Add test to detect boot event slowdowns

by Laura Nao

Introduce a new kselftest to identify slowdowns in key boot events. This test uses ftrace to monitor the start and end times, as well as the durations of all initcalls, and compares these timings to reference values to identify significant slowdowns. The script functions in two modes: the 'generate' mode allows to create a JSON file containing initial reference timings for all initcalls from a known stable kernel. The 'test' mode can be used during subsequent boots to assess current timings against the reference values and determine if there are any significant differences. The test ships with a bootconfig file for setting up ftrace and a configuration fragment for the necessary kernel configs. Signed-off-by: Laura Nao <laura.nao(a)collabora.com> --- Hello, This v2 is a follow-up to RFCv1[1] and includes changes based on feedback from the LPC 2024 session [2], along with some other fixes. [1] https://lore.kernel.org/all/20240725110622.96301-1-laura.nao@collabora.com/ [2] https://www.youtube.com/watch?v=rWhW2-Vzi40 After reviewing other available tests and considering the feedback from discussions at Plumbers, I decided to stick with the bootconfig file approach but extend it to track all initcalls instead of a fixed set of functions or events. The bootconfig file can be expanded and adapted to track additional functions if needed for specific use cases. I also defined a synthetic event to calculate initcall durations, while still tracking their start and end times. Users are then allowed to choose whether to compare start times, end times, or durations. Support for specifying different rules for different initcalls has also been added. In RFCv1, there was some discussion about using existing tools like bootgraph.py. However, the output from these tools is mainly for manual inspection (e.g., HTML visual output), whereas this test is designed to run in automated CI environments too. The kselftest proposed here combines the process of generating reference data and running tests into a single script with two modes, making it easy to integrate into automated workflows. Many of the features in this v2 (e.g., generating a JSON reference file, comparing timings, and reporting results in KTAP format) could potentially be integrated into bootgraph.py with some effort. However, since this test is intended for automated execution rather than manual use, I've decided to keep it separate for now and explore the options suggested at LPC, such as using ftrace histograms for initcall latencies. I'm open to revisiting this decision and working toward integrating the changes into bootgraph.py if there's a strong preference for unifying the tools. Let me know your thoughts. A comprehensive changelog is reported below. Thanks, Laura --- Changes in v2: - Updated ftrace configuration to track all initcall start times, end times, and durations, and generate a histogram. - Modified test logic to compare initcall durations by default, with the option to compare start or end times if needed. - Added warnings if the initcalls in the reference file differ from those detected in the running system. - Combined the scripts into a single script with two modes: one for generating the reference file and one for running the test. - Added support for specifying different rules for individual initcalls. - Switched the reference format from YAML to JSON. - Added metadata to the reference file, including kernel version, kernel configuration, and cmdline. - Link to v1: https://lore.kernel.org/all/20240725110622.96301-1-laura.nao@collabora.com/ --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/boot-time/Makefile | 16 ++ tools/testing/selftests/boot-time/bootconfig | 15 + tools/testing/selftests/boot-time/config | 6 + .../selftests/boot-time/test_boot_time.py | 265 ++++++++++++++++++ 5 files changed, 303 insertions(+) create mode 100644 tools/testing/selftests/boot-time/Makefile create mode 100644 tools/testing/selftests/boot-time/bootconfig create mode 100644 tools/testing/selftests/boot-time/config create mode 100755 tools/testing/selftests/boot-time/test_boot_time.py diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..1bb20d1e3854 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -3,6 +3,7 @@ TARGETS += acct TARGETS += alsa TARGETS += amd-pstate TARGETS += arm64 +TARGETS += boot-time TARGETS += bpf TARGETS += breakpoints TARGETS += cachestat diff --git a/tools/testing/selftests/boot-time/Makefile b/tools/testing/selftests/boot-time/Makefile new file mode 100644 index 000000000000..cdcdc1bbe779 --- /dev/null +++ b/tools/testing/selftests/boot-time/Makefile @@ -0,0 +1,16 @@ +PY3 = $(shell which python3 2>/dev/null) + +ifneq ($(PY3),) + +TEST_PROGS := test_boot_time.py + +include ../lib.mk + +else + +all: no_py3_warning + +no_py3_warning: + @echo "Missing python3. This test will be skipped." + +endif \ No newline at end of file diff --git a/tools/testing/selftests/boot-time/bootconfig b/tools/testing/selftests/boot-time/bootconfig new file mode 100644 index 000000000000..e4b89a33b7a3 --- /dev/null +++ b/tools/testing/selftests/boot-time/bootconfig @@ -0,0 +1,15 @@ +ftrace.event { + synthetic.initcall_latency { + # Synthetic event to record initcall latency, start, and end times + fields = "unsigned long func", "u64 lat", "u64 start", "u64 end" + actions = "hist:keys=func.sym,start,end:vals=lat:sort=lat" + } + initcall.initcall_start { + # Capture the start time (ts0) when initcall starts + actions = "hist:keys=func:ts0=common_timestamp.usecs" + } + initcall.initcall_finish { + # Capture the end time, calculate latency, and trigger synthetic event + actions = "hist:keys=func:lat=common_timestamp.usecs-$ts0:start=$ts0:end=common_timestamp.usecs:onmatch(initcall.initcall_start).initcall_latency(func,$lat,$start,$end)" + } +} \ No newline at end of file diff --git a/tools/testing/selftests/boot-time/config b/tools/testing/selftests/boot-time/config new file mode 100644 index 000000000000..bcb646ec3cd8 --- /dev/null +++ b/tools/testing/selftests/boot-time/config @@ -0,0 +1,6 @@ +CONFIG_TRACING=y +CONFIG_BOOTTIME_TRACING=y +CONFIG_BOOT_CONFIG_EMBED=y +CONFIG_BOOT_CONFIG_EMBED_FILE="tools/testing/selftests/boot-time/bootconfig" +CONFIG_SYNTH_EVENTS=y +CONFIG_HIST_TRIGGERS=y \ No newline at end of file diff --git a/tools/testing/selftests/boot-time/test_boot_time.py b/tools/testing/selftests/boot-time/test_boot_time.py new file mode 100755 index 000000000000..556dacf04b6d --- /dev/null +++ b/tools/testing/selftests/boot-time/test_boot_time.py @@ -0,0 +1,265 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2024 Collabora Ltd +# +# This script reads the +# /sys/kernel/debug/tracing/events/synthetic/initcall_latency/hist file, +# extracts function names and timings, and compares them against reference +# timings provided in an input JSON file to identify significant boot +# slowdowns. +# The script operates in two modes: +# - Generate Mode: parses initcall timings from the current kernel's ftrace +# event histogram and generates a JSON reference file with function +# names, start times, end times, and latencies. +# - Test Mode: compares current initcall timings against the reference +# file, allowing users to define a maximum allowed difference between the +# values (delta). Users can also apply custom delta thresholds for +# specific initcalls using regex-based overrides. The comparison can be +# done on latency, start, or end times. +# + +import os +import sys +import argparse +import gzip +import json +import re +import subprocess + +this_dir = os.path.dirname(os.path.realpath(__file__)) +sys.path.append(os.path.join(this_dir, "../kselftest/")) + +import ksft + +def load_reference_from_json(file_path): + """ + Load reference data from a JSON file and returns the parsed data. + @file_path: path to the JSON file. + """ + + try: + with open(file_path, 'r', encoding="utf-8") as file: + return json.load(file) + except FileNotFoundError: + ksft.print_msg(f"Error: File {file_path} not found.") + ksft.exit_fail() + except json.JSONDecodeError: + ksft.print_msg(f"Error: Failed to decode JSON from {file_path}.") + ksft.exit_fail() + + +def mount_debugfs(path): + """ + Mount debugfs at the specified path if it is not already mounted. + @path: path where debugfs should be mounted + """ + # Check if debugfs is already mounted + with open('/proc/mounts', 'r', encoding="utf-8") as mounts: + for line in mounts: + if 'debugfs' in line and path in line: + print(f"debugfs is already mounted at {path}") + return True + + # Mount debugfs + try: + subprocess.run(['mount', '-t', 'debugfs', 'none', path], check=True) + return True + except subprocess.CalledProcessError as e: + print(f"Failed to mount debugfs: {e.stderr}") + return False + + +def ensure_unique_function_name(func, initcall_entries): + """ + Ensure the function name is unique by appending a suffix if necessary. + @func: the original function name. + @initcall_entries: a dictionary containing parsed initcall entries. + """ + i = 2 + base_func = func + while func in initcall_entries: + func = f'{base_func}[{i}]' + i += 1 + return func + + +def parse_initcall_latency_hist(): + """ + Parse the ftrace histogram for the initcall_latency event, extracting + function names, start times, end times, and latencies. Return a + dictionary where each entry is structured as follows: + { + <function symbolic name>: { + "start": <start time>, + "end": <end time>, + "latency": <latency> + } + } + """ + + pattern = re.compile(r'\{ func: \[\w+\] ([\w_]+)\s*, start: *(\d+), end: *(\d+) \} hitcount: *\d+ lat: *(\d+)') + initcall_entries = {} + + try: + with open('/sys/kernel/debug/tracing/events/synthetic/initcall_latency/hist', 'r', encoding="utf-8") as hist_file: + for line in hist_file: + match = pattern.search(line) + if match: + func = match.group(1).strip() + start = int(match.group(2)) + end = int(match.group(3)) + latency = int(match.group(4)) + + # filter out unresolved names + if not func.startswith("0x"): + func = ensure_unique_function_name(func, initcall_entries) + + initcall_entries[func] = { + "start": start, + "end": end, + "latency": latency + } + except FileNotFoundError: + print("Error: Histogram file not found.") + + return initcall_entries + + +def compare_initcall_list(ref_initcall_entries, cur_initcall_entries): + """ + Compare the current list of initcall functions against the reference + file. Print warnings if there are unique entries in either. + @ref_initcall_entries: reference initcall entries. + @cur_initcall_entries: current initcall entries. + """ + ref_entries = set(ref_initcall_entries.keys()) + cur_entries = set(cur_initcall_entries.keys()) + + unique_to_ref = ref_entries - cur_entries + unique_to_cur = cur_entries - ref_entries + + if (unique_to_ref): + ksft.print_msg( + f"Warning: {list(unique_to_ref)} not found in current data. Consider updating reference file.") + if unique_to_cur: + ksft.print_msg( + f"Warning: {list(unique_to_cur)} not found in reference data. Consider updating reference file.") + + +def run_test(ref_file_path, delta, overrides, mode): + """ + Run the test comparing the current timings with the reference values. + @ref_file_path: path to the JSON file containing reference values. + @delta: default allowed difference between reference and current + values. + @overrides: override rules in the form of regex:threshold. + @mode: the comparison mode (either 'start', 'end', or 'latency'). + """ + + ref_data = load_reference_from_json(ref_file_path) + + ref_initcall_entries = ref_data['data'] + cur_initcall_entries = parse_initcall_latency_hist() + + compare_initcall_list(ref_initcall_entries, cur_initcall_entries) + + ksft.set_plan(len(ref_initcall_entries)) + + for func_name in ref_initcall_entries: + effective_delta = delta + for regex, override_delta in overrides.items(): + if re.match(regex, func_name): + effective_delta = override_delta + break + if (func_name in cur_initcall_entries): + ref_metric = ref_initcall_entries[func_name].get(mode) + cur_metric = cur_initcall_entries[func_name].get(mode) + if (cur_metric > ref_metric and (cur_metric - ref_metric) >= effective_delta): + ksft.test_result_fail(func_name) + ksft.print_msg(f"'{func_name}' {mode} differs by " + f"{(cur_metric - ref_metric)} usecs.") + else: + ksft.test_result_pass(func_name) + else: + ksft.test_result_skip(func_name) + + +def generate_reference_file(file_path): + """ + Generate a reference file in JSON format, containing kernel metadata + and initcall timing data. + @file_path: output file path. + """ + metadata = {} + + config_file = "/proc/config.gz" + if os.path.isfile(config_file): + with gzip.open(config_file, "rt", encoding="utf-8") as f: + config = f.read() + metadata["config"] = config + + metadata["version"] = os.uname().release + + cmdline_file = "/proc/cmdline" + if os.path.isfile(cmdline_file): + with open(cmdline_file, "r", encoding="utf-8") as f: + cmdline = f.read().strip() + metadata["cmdline"] = cmdline + + ref_data = { + "metadata": metadata, + "data": parse_initcall_latency_hist(), + } + + with open(file_path, "w", encoding='utf-8') as f: + json.dump(ref_data, f, indent=4) + print(f"Generated {file_path}") + + +if __name__ == "__main__": + parser = argparse.ArgumentParser( + description="") + + subparsers = parser.add_subparsers(dest='mode', required=True, help='Choose between generate or test modes') + + generate_parser = subparsers.add_parser('generate', help="Generate a reference file") + generate_parser.add_argument('out_ref_file', nargs='?', default='reference_initcall_timings.json', + help='Path to output JSON reference file (default: reference_initcall_timings.json)') + + compare_parser = subparsers.add_parser('test', help='Test against a reference file') + compare_parser.add_argument('in_ref_file', help='Path to JSON reference file') + compare_parser.add_argument( + 'delta', type=int, help='Maximum allowed delta between the current and the reference timings (usecs)') + compare_parser.add_argument('--override', '-o', action='append', type=str, + help="Specify regex-based rules as regex:delta (e.g., '^acpi_.*:50')") + compare_parser.add_argument('--mode', '-m', default='latency', choices=[ + 'start', 'end', 'latency'], + help="Comparison mode: 'latency' (default) for latency, 'start' for start times, or 'end' for end times.") + + args = parser.parse_args() + + if args.mode == 'generate': + generate_reference_file(args.out_ref_file) + sys.exit(0) + + # Process overrides + overrides = {} + if args.override: + for override in args.override: + try: + pattern, delta = override.split(":") + overrides[pattern] = int(delta) + except ValueError: + print(f"Invalid override format: {override}. Expected format is 'regex:delta'.") + sys.exit(1) + + # Ensure debugfs is mounted + if not mount_debugfs("/sys/kernel/debug"): + ksft.exit_fail() + + ksft.print_header() + + run_test(args.in_ref_file, args.delta, overrides, args.mode) + + ksft.finished() -- 2.30.2

8 months, 2 weeks

1
0
0 0

[PATCH v2] selftest/tcp-ao: Add filter tests

by Leo Stone

Add tests that check if getsockopt(TCP_AO_GET_KEYS) returns the right keys when using different filters. Sample output: > # ok 114 filter keys: by sndid, rcvid, address > # ok 115 filter keys: by is_current > # ok 116 filter keys: by is_rnext > # ok 117 filter keys: by sndid, rcvid > # ok 118 filter keys: correct nkeys when in.nkeys < matched_keys Signed-off-by: Leo Stone <leocstone(a)gmail.com> --- Changes in v2: - Changed 2 unnecessary test_error calls to test_fail - Added another test to make sure getsockopt returns the right nkeys value when the input nkeys is smaller than the number of matching keys - Removed the TODO that this patch addresses Thank you for your feedback. --- .../selftests/net/tcp_ao/setsockopt-closed.c | 180 +++++++++++++++++- 1 file changed, 175 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c b/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c index 084db4ecdff6..4bfa76c28e4e 100644 --- a/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c +++ b/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c @@ -6,6 +6,8 @@ static union tcp_addr tcp_md5_client; +#define FILTER_TEST_NKEYS 16 + static int test_port = 7788; static void make_listen(int sk) { @@ -813,23 +815,191 @@ static void duplicate_tests(void) setsockopt_checked(sk, TCP_AO_ADD_KEY, &ao, EEXIST, "duplicate: SendID differs"); } + +static void fetch_all_keys(int sk, struct tcp_ao_getsockopt *keys) +{ + socklen_t optlen = sizeof(struct tcp_ao_getsockopt); + + memset(keys, 0, sizeof(struct tcp_ao_getsockopt) * FILTER_TEST_NKEYS); + keys[0].get_all = 1; + keys[0].nkeys = FILTER_TEST_NKEYS; + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, &keys[0], &optlen)) + test_error("getsockopt"); +} + +static int prepare_test_keys(struct tcp_ao_getsockopt *keys) +{ + struct tcp_ao_add test_ao[FILTER_TEST_NKEYS]; + u8 rcvid = 100, sndid = 100; + const char *test_password = "Test password number "; + char test_password_scratch[64] = {}; + int sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP); + + if (sk < 0) + test_error("socket()"); + + for (int i = 0; i < FILTER_TEST_NKEYS; i++) { + snprintf(test_password_scratch, 64, "%s %d", test_password, i); + test_prepare_key(&test_ao[i], DEFAULT_TEST_ALGO, this_ip_dest, false, false, + DEFAULT_TEST_PREFIX, 0, sndid++, rcvid++, 0, 0, + strlen(test_password_scratch), test_password_scratch); + } + test_ao[0].set_current = 1; + test_ao[1].set_rnext = 1; + /* One key with a different addr and overlapping sndid, rcvid */ + tcp_addr_to_sockaddr_in(&test_ao[2].addr, &this_ip_addr, 0); + test_ao[2].sndid = 100; + test_ao[2].rcvid = 100; + + /* Add keys in a random order */ + for (int i = 0; i < FILTER_TEST_NKEYS; i++) { + int randidx = rand() % (FILTER_TEST_NKEYS - i); + + if (setsockopt(sk, IPPROTO_TCP, TCP_AO_ADD_KEY, &test_ao[randidx], + sizeof(struct tcp_ao_add))) + test_error("setsockopt()"); + memcpy(&test_ao[randidx], &test_ao[FILTER_TEST_NKEYS - 1 - i], + sizeof(struct tcp_ao_add)); + } + + fetch_all_keys(sk, keys); + + return sk; +} + +/* Assumes passwords are unique */ +static int compare_mkts(struct tcp_ao_getsockopt *expected, int nexpected, + struct tcp_ao_getsockopt *actual, int nactual) +{ + int matches = 0; + + for (int i = 0; i < nexpected; i++) { + for (int j = 0; j < nactual; j++) { + if (memcmp(expected[i].key, actual[j].key, TCP_AO_MAXKEYLEN) == 0) + matches++; + } + } + return nexpected - matches; +} + +static void filter_keys_checked(int sk, struct tcp_ao_getsockopt *filter, + struct tcp_ao_getsockopt *expected, + unsigned int nexpected, const char *tst) +{ + struct tcp_ao_getsockopt all_keys[FILTER_TEST_NKEYS] = {}; + struct tcp_ao_getsockopt filtered_keys[FILTER_TEST_NKEYS] = {}; + socklen_t len = sizeof(struct tcp_ao_getsockopt); + + fetch_all_keys(sk, all_keys); + memcpy(&filtered_keys[0], filter, sizeof(struct tcp_ao_getsockopt)); + filtered_keys[0].nkeys = FILTER_TEST_NKEYS; + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, filtered_keys, &len)) + test_error("getsockopt"); + if (filtered_keys[0].nkeys != nexpected) { + test_fail("wrong nr of keys, expected %u got %u", nexpected, + filtered_keys[0].nkeys); + goto out_close; + } + if (compare_mkts(expected, nexpected, filtered_keys, filtered_keys[0].nkeys)) { + test_fail("got wrong keys back"); + goto out_close; + } + test_ok("filter keys: %s", tst); + +out_close: + close(sk); + memset(filter, 0, sizeof(struct tcp_ao_getsockopt)); +} + +static void filter_tests(void) +{ + struct tcp_ao_getsockopt original_keys[FILTER_TEST_NKEYS]; + struct tcp_ao_getsockopt expected_keys[FILTER_TEST_NKEYS]; + struct tcp_ao_getsockopt filter = {}; + int sk, f, nmatches; + socklen_t len; + + f = 2; + sk = prepare_test_keys(original_keys); + filter.rcvid = original_keys[f].rcvid; + filter.sndid = original_keys[f].sndid; + memcpy(&filter.addr, &original_keys[f].addr, sizeof(original_keys[f].addr)); + filter.prefix = original_keys[f].prefix; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by sndid, rcvid, address"); + + f = -1; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].is_current) { + f = i; + break; + } + } + if (f < 0) + test_error("No current key after adding one"); + filter.is_current = 1; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by is_current"); + + f = -1; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].is_rnext) { + f = i; + break; + } + } + if (f < 0) + test_error("No rnext key after adding one"); + filter.is_rnext = 1; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by is_rnext"); + + f = -1; + nmatches = 0; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].sndid == 100) { + f = i; + memcpy(&expected_keys[nmatches], &original_keys[i], + sizeof(struct tcp_ao_getsockopt)); + nmatches++; + } + } + if (f < 0) + test_error("No key for sndid 100"); + if (nmatches != 2) + test_error("Should have 2 keys with sndid 100"); + filter.rcvid = original_keys[f].rcvid; + filter.sndid = original_keys[f].sndid; + filter.addr.ss_family = test_family; + filter_keys_checked(sk, &filter, expected_keys, nmatches, "by sndid, rcvid"); + + sk = prepare_test_keys(original_keys); + filter.get_all = 1; + filter.nkeys = FILTER_TEST_NKEYS / 2; + len = sizeof(struct tcp_ao_getsockopt); + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, &filter, &len)) + test_error("getsockopt"); + if (filter.nkeys == FILTER_TEST_NKEYS) + test_ok("filter keys: correct nkeys when in.nkeys < matched_keys"); + else + test_fail("filter keys: wrong nkeys, expected %u got %u", + FILTER_TEST_NKEYS, filter.nkeys); +} + static void *client_fn(void *arg) { if (inet_pton(TEST_FAMILY, __TEST_CLIENT_IP(2), &tcp_md5_client) != 1) test_error("Can't convert ip address"); extend_tests(); einval_tests(); + filter_tests(); duplicate_tests(); - /* - * TODO: check getsockopt(TCP_AO_GET_KEYS) with different filters - * returning proper nr & keys; - */ return NULL; } int main(int argc, char *argv[]) { - test_init(121, client_fn, NULL); + test_init(126, client_fn, NULL); return 0; } -- 2.43.0

8 months, 2 weeks

3
2
0 0

[PATCH v6 0/5] selftests: kvm: s390: Add ucontrol memory selftests

by Christoph Schlameuss

This patch series adds a some not yet picked selftests to the kvm s390x selftest suite. The additional test cases are covering: * Assert KVM_EXIT_S390_UCONTROL exit on not mapped memory access * Assert functionality of storage keys in ucontrol VM * Assert that memory region operations are rejected for ucontrol VMs Running the test cases requires sys_admin capabilities to start the ucontrol VM. This can be achieved by running as root or with a command like: sudo setpriv --reuid nobody --inh-caps -all,+sys_admin \ --ambient-caps -all,+sys_admin --bounding-set -all,+sys_admin \ ./ucontrol_test --- The patches in this series have been part of the previous patch series. The test cases added here do depend on the fixture added in the earlier patches. From v5 PATCH 7-9 the segment and page table generation has been removed and DAT has been disabled. Since DAT is not necessary to validate the KVM code. https://lore.kernel.org/kvm/20240807154512.316936-1-schlameuss@linux.ibm.co… v6: - add instruction intercept handling for skey specific instructions (iske, sske, rrbe) in addition to kss intercept to work properly on all machines - reorder local variables - fixup some method comments - add a patch correcting the IP.b value length a debug message v5: - rebased to current upstream master - corrected assertion on 0x00 to 0 - reworded fixup commit so that it can be merged on top of current upstream v4: - fix whitespaces in pointer function arguments (thanks Claudio) - fix whitespaces in comments (thanks Janosch) v3: - fix skey assertion (thanks Claudio) - introduce a wrapper around UCAS map and unmap ioctls to improve readability (Claudio) - add an displacement to accessed memory to assert translation intercepts actually point to segments to the uc_map_unmap test - add an misaligned failing mapping try to the uc_map_unmap test v2: - Reenable KSS intercept and handle it within skey test. - Modify the checked register between storing (sske) and reading (iske) it within the test program to make sure the. - Add an additional state assertion in the end of uc_skey - Fix some typos and white spaces. v1: - Remove segment and page table generation and disable DAT. This is not necessary to validate the KVM code. Christoph Schlameuss (5): selftests: kvm: s390: Add uc_map_unmap VM test case selftests: kvm: s390: Add uc_skey VM test case selftests: kvm: s390: Verify reject memory region operations for ucontrol VMs selftests: kvm: s390: Fix whitespace confusion in ucontrol test selftests: kvm: s390: correct IP.b length in uc_handle_sieic debug output .../selftests/kvm/include/s390x/processor.h | 6 + .../selftests/kvm/s390x/ucontrol_test.c | 307 +++++++++++++++++- 2 files changed, 305 insertions(+), 8 deletions(-) base-commit: eca631b8fe808748d7585059c4307005ca5c5820 -- 2.47.0

8 months, 2 weeks

2
11
0 0

[PATCH RFC v5 00/10] tun: Introduce virtio-net hashing feature

by Akihiko Odaki

virtio-net have two usage of hashes: one is RSS and another is hash reporting. Conventionally the hash calculation was done by the VMM. However, computing the hash after the queue was chosen defeats the purpose of RSS. Another approach is to use eBPF steering program. This approach has another downside: it cannot report the calculated hash due to the restrictive nature of eBPF. Introduce the code to compute hashes to the kernel in order to overcome thse challenges. An alternative solution is to extend the eBPF steering program so that it will be able to report to the userspace, but it is based on context rewrites, which is in feature freeze. We can adopt kfuncs, but they will not be UAPIs. We opt to ioctl to align with other relevant UAPIs (KVM and vhost_net). The patches for QEMU to use this new feature was submitted as RFC and is available at: https://patchew.org/QEMU/20240915-hash-v3-0-79cb08d28647@daynix.com/ This work was presented at LPC 2024: https://lpc.events/event/18/contributions/1963/ V1 -> V2: Changed to introduce a new BPF program type. Signed-off-by: Akihiko Odaki <akihiko.odaki(a)daynix.com> --- Changes in v5: - Fixed a compilation error with CONFIG_TUN_VNET_CROSS_LE. - Optimized the calculation of the hash value according to: https://git.dpdk.org/dpdk/commit/?id=3fb1ea032bd6ff8317af5dac9af901f1f324ca… - Added patch "tun: Unify vnet implementation". - Dropped patch "tap: Pad virtio header with zero". - Added patch "selftest: tun: Test vnet ioctls without device". - Reworked selftests to skip for older kernels. - Documented the case when the underlying device is deleted and packets have queue_mapping set by TC. - Reordered test harness arguments. - Added code to handle fragmented packets. - Link to v4: https://lore.kernel.org/r/20240924-rss-v4-0-84e932ec0e6c@daynix.com Changes in v4: - Moved tun_vnet_hash_ext to if_tun.h. - Renamed virtio_net_toeplitz() to virtio_net_toeplitz_calc(). - Replaced htons() with cpu_to_be16(). - Changed virtio_net_hash_rss() to return void. - Reordered variable declarations in virtio_net_hash_rss(). - Removed virtio_net_hdr_v1_hash_from_skb(). - Updated messages of "tap: Pad virtio header with zero" and "tun: Pad virtio header with zero". - Fixed vnet_hash allocation size. - Ensured to free vnet_hash when destructing tun_struct. - Link to v3: https://lore.kernel.org/r/20240915-rss-v3-0-c630015db082@daynix.com Changes in v3: - Reverted back to add ioctl. - Split patch "tun: Introduce virtio-net hashing feature" into "tun: Introduce virtio-net hash reporting feature" and "tun: Introduce virtio-net RSS". - Changed to reuse hash values computed for automq instead of performing RSS hashing when hash reporting is requested but RSS is not. - Extracted relevant data from struct tun_struct to keep it minimal. - Added kernel-doc. - Changed to allow calling TUNGETVNETHASHCAP before TUNSETIFF. - Initialized num_buffers with 1. - Added a test case for unclassified packets. - Fixed error handling in tests. - Changed tests to verify that the queue index will not overflow. - Rebased. - Link to v2: https://lore.kernel.org/r/20231015141644.260646-1-akihiko.odaki@daynix.com --- Akihiko Odaki (10): virtio_net: Add functions for hashing skbuff: Introduce SKB_EXT_TUN_VNET_HASH net: flow_dissector: Export flow_keys_dissector_symmetric tun: Unify vnet implementation tun: Pad virtio header with zero tun: Introduce virtio-net hash reporting feature tun: Introduce virtio-net RSS selftest: tun: Test vnet ioctls without device selftest: tun: Add tests for virtio-net hashing vhost/net: Support VIRTIO_NET_F_HASH_REPORT Documentation/networking/tuntap.rst | 7 + MAINTAINERS | 1 + drivers/net/Kconfig | 1 + drivers/net/tap.c | 218 ++++-------- drivers/net/tun.c | 293 ++++++---------- drivers/net/tun_vnet.h | 342 +++++++++++++++++++ drivers/vhost/net.c | 16 +- include/linux/if_tap.h | 2 + include/linux/skbuff.h | 3 + include/linux/virtio_net.h | 188 +++++++++++ include/net/flow_dissector.h | 1 + include/uapi/linux/if_tun.h | 75 +++++ net/core/flow_dissector.c | 3 +- net/core/skbuff.c | 4 + tools/testing/selftests/net/Makefile | 2 +- tools/testing/selftests/net/tun.c | 630 ++++++++++++++++++++++++++++++++++- 16 files changed, 1430 insertions(+), 356 deletions(-) --- base-commit: 752ebcbe87aceeb6334e846a466116197711a982 change-id: 20240403-rss-e737d89efa77 Best regards, -- Akihiko Odaki <akihiko.odaki(a)daynix.com>

8 months, 2 weeks

3
23
0 0

[PATCH 0/4] kunit: Add support for LoongArch

by Thomas Weißschuh

Enable LoongArch support in kunit. Example: $ ./tools/testing/kunit/kunit.py run --arch=loongarch --cross_compile=$CROSS_COMPILE [13:32:45] Configuring KUnit Kernel ... [13:32:45] Building KUnit Kernel ... Populating config with: $ make ARCH=loongarch olddefconfig CROSS_COMPILE=$CROSS_COMPILE Building with: $ make all compile_commands.json ARCH=loongarch --jobs=8 CROSS_COMPILE=$CROSS_COMPILE [13:32:48] Starting KUnit Kernel (1/1)... [13:32:48] ============================================================ Running tests with: $ qemu-system-loongarch64 -nodefaults -m 1024 -kernel .kunit/arch/loongarch/boot/vmlinux.elf -append 'kunit.enable=1 console=ttyS0 kunit_shutdown=poweroff' -no-reboot -nographic -serial stdio -machine virt -device pvpanic-pci -cpu max ... [13:33:14] ============================================================ [13:33:14] Testing complete. Ran 493 tests: passed: 453, skipped: 40 [13:33:14] Elapsed time: 28.862s total, 0.002s configuring, 2.526s building, 26.302s running Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- Thomas Weißschuh (4): LoongArch: Don't crash in stack_top() for tasks without vDSO kunit: qemu_configs: add LoongArch config kunit: tool: Allow overriding the shutdown mode from qemu config kunit: qemu_configs: loongarch: Enable shutdown arch/loongarch/kernel/process.c | 16 +++++++++------- tools/testing/kunit/kunit_kernel.py | 4 +++- tools/testing/kunit/qemu_configs/loongarch.py | 19 +++++++++++++++++++ 3 files changed, 31 insertions(+), 8 deletions(-) --- base-commit: 6485cf5ea253d40d507cd71253c9568c5470cd27 change-id: 20241014-kunit-loongarch-98a5b756e818 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

8 months, 2 weeks

5
16
0 0

[PATCH 1/3] selftests: Add a few missing gitignore files

by Li Zhijian

Binary files should be added to .gitignore 'git status' complains: Untracked files: (use "git add <file>..." to include in what will be committed) alsa/global-timer alsa/utimer-test filesystems/statmount/statmount_test_ns mm/hugetlb_dio mm/pkey_sighandler_tests_32 mm/pkey_sighandler_tests_64 net/netfilter/conntrack_reverse_clash Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> --- tools/testing/selftests/alsa/.gitignore | 2 ++ tools/testing/selftests/filesystems/statmount/.gitignore | 1 + tools/testing/selftests/mm/.gitignore | 2 ++ tools/testing/selftests/net/netfilter/.gitignore | 1 + 4 files changed, 6 insertions(+) diff --git a/tools/testing/selftests/alsa/.gitignore b/tools/testing/selftests/alsa/.gitignore index 12dc3fcd3456..1407fd24a97b 100644 --- a/tools/testing/selftests/alsa/.gitignore +++ b/tools/testing/selftests/alsa/.gitignore @@ -1,3 +1,5 @@ mixer-test pcm-test test-pcmtest-driver +global-timer +utimer-test diff --git a/tools/testing/selftests/filesystems/statmount/.gitignore b/tools/testing/selftests/filesystems/statmount/.gitignore index 82a4846cbc4b..66a21f289453 100644 --- a/tools/testing/selftests/filesystems/statmount/.gitignore +++ b/tools/testing/selftests/filesystems/statmount/.gitignore @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only /*_test +statmount_test_ns diff --git a/tools/testing/selftests/mm/.gitignore b/tools/testing/selftests/mm/.gitignore index da030b43e43b..2ac11b7fcb26 100644 --- a/tools/testing/selftests/mm/.gitignore +++ b/tools/testing/selftests/mm/.gitignore @@ -51,3 +51,5 @@ hugetlb_madv_vs_map mseal_test seal_elf droppable +hugetlb_dio +pkey_sighandler_tests* diff --git a/tools/testing/selftests/net/netfilter/.gitignore b/tools/testing/selftests/net/netfilter/.gitignore index 0a64d6d0e29a..eef8d5784e94 100644 --- a/tools/testing/selftests/net/netfilter/.gitignore +++ b/tools/testing/selftests/net/netfilter/.gitignore @@ -4,3 +4,4 @@ connect_close conntrack_dump_flush sctp_collision nf_queue +conntrack_reverse_clash -- 2.44.0

8 months, 2 weeks

5
7
0 0

[PATCH] munmap sealed memory cause memory to split (bug)

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)google.com> It appears there is a regression on the latest mm, when munmap sealed memory, it can cause unexpected VMA split. E.g. repro use this test. --- tools/testing/selftests/mm/mseal_test.c | 76 +++++++++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/tools/testing/selftests/mm/mseal_test.c b/tools/testing/selftests/mm/mseal_test.c index fa74dbe4a684..0af33e13b606 100644 --- a/tools/testing/selftests/mm/mseal_test.c +++ b/tools/testing/selftests/mm/mseal_test.c @@ -1969,6 +1969,79 @@ static void test_madvise_filebacked_was_writable(bool seal) REPORT_TEST_PASS(); } +static void test_munmap_free_multiple_ranges_with_split(bool seal) +{ + void *ptr; + unsigned long page_size = getpagesize(); + unsigned long size = 12 * page_size; + int ret; + int prot; + + setup_single_address(size, &ptr); + FAIL_TEST_IF_FALSE(ptr != (void *)-1); + + /* seal the middle 4 page */ + if (seal) { + ret = sys_mseal(ptr + 4 * page_size, 4 * page_size); + FAIL_TEST_IF_FALSE(!ret); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 4); + + size = get_vma_size(ptr + 4 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 4); + + size = get_vma_size(ptr + 8 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 4); + } + + /* munmap 4 pages from the third page */ + ret = sys_munmap(ptr + 2 * page_size, 4 * page_size); + if (seal) { + FAIL_TEST_IF_FALSE(ret); + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 4); + + size = get_vma_size(ptr + 4 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 4); + + size = get_vma_size(ptr + 8 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 4); + } else + FAIL_TEST_IF_FALSE(!ret); + + /* munmap 4 pages from the sealed page */ + ret = sys_munmap(ptr + 6 * page_size, 4 * page_size); + if (seal) { + FAIL_TEST_IF_FALSE(ret); + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr + 4 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 4); + + size = get_vma_size(ptr + 4 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 4); + + size = get_vma_size(ptr + 8 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 4); + } else + FAIL_TEST_IF_FALSE(!ret); + + REPORT_TEST_PASS(); +} + + int main(int argc, char **argv) { bool test_seal = seal_support(); @@ -2099,5 +2172,8 @@ int main(int argc, char **argv) test_madvise_filebacked_was_writable(false); test_madvise_filebacked_was_writable(true); + test_munmap_free_multiple_ranges_with_split(false); + test_munmap_free_multiple_ranges_with_split(true); + ksft_finished(); } -- 2.47.0.rc1.288.g06298d1525-goog

8 months, 2 weeks

6
11
0 0

[PATCH 0/8] kselftest/arm64: various compilation fixes

by Andre Przywara

This fixes several smaller issues I faced when compiling the arm64 kselftests on my machine. Patch 1 avoids a warning about the double definition of GNU_SOURCE, for the arm64/signal tests. Patch 2 fixes a typo, where the f8dp2 hwcap feature test was looking at the f8dp*4* cpuinfo name. Patch 3 adjusts the output of the MTE tests when MTE is not available, so that tools parsing the TAP output don't get confused and report errors. The remaining patches are about wrong printf format specifiers. I grouped them by type of error, in patch 4-8. Please have a look! Cheers, Andre Andre Przywara (8): kselftest/arm64: signal: drop now redundant GNU_SOURCE definition kselftest/arm64: hwcap: fix f8dp2 cpuinfo name kselftest/arm64: mte: use proper SKIP syntax kselftest/arm64: mte: use string literal for printf-style functions kselftest/arm64: mte: fix printf type warning about mask kselftest/arm64: mte: fix printf type warnings about __u64 kselftest/arm64: mte: fix printf type warnings about pointers kselftest/arm64: mte: fix printf type warnings about longs tools/testing/selftests/arm64/abi/hwcap.c | 2 +- .../selftests/arm64/mte/check_buffer_fill.c | 4 ++-- tools/testing/selftests/arm64/mte/check_prctl.c | 4 ++-- .../selftests/arm64/mte/check_tags_inclusion.c | 4 ++-- .../testing/selftests/arm64/mte/mte_common_util.c | 15 +++++++-------- .../testing/selftests/arm64/mte/mte_common_util.h | 6 +++--- tools/testing/selftests/arm64/signal/Makefile | 2 +- 7 files changed, 18 insertions(+), 19 deletions(-) -- 2.25.1

8 months, 2 weeks

3
21
0 0

[PATCH 0/3] Handle MMIO during event delivery error on SVM

by Ivan Orlov

Currently, the situation when guest accesses MMIO during event delivery is handled differently in VMX and SVM: on VMX KVM returns internal error with suberror = KVM_INTERNAL_ERROR_DELIVERY_EV, when SVM simply goes into infinite loop trying to deliver an event again and again. This patch series eliminates this difference by returning a KVM internal error with suberror = KVM_INTERNAL_ERROR_DELIVERY_EV when guest is performing MMIO during event delivery, for both VMX and SVM. Also, it introduces a selftest test case which covers the MMIO during event delivery error handling. Ivan Orlov (3): KVM: x86, vmx: Add function for event delivery error generation KVM: vmx, svm, mmu: Process MMIO during event delivery selftests: KVM: Add test case for MMIO during event delivery arch/x86/include/asm/kvm_host.h | 8 ++++ arch/x86/kvm/mmu/mmu.c | 15 +++++- arch/x86/kvm/svm/svm.c | 4 ++ arch/x86/kvm/vmx/vmx.c | 32 ++++--------- arch/x86/kvm/x86.c | 22 +++++++++ .../selftests/kvm/set_memory_region_test.c | 46 +++++++++++++++++++ 6 files changed, 104 insertions(+), 23 deletions(-) -- 2.43.0

8 months, 2 weeks

4
15
0 0

[PATCH -next 1/2] selftests:timers: remove unneeded semicolon

by Jiapeng Chong

No functional modification involved. ./tools/testing/selftests/timers/nanosleep.c:63:2-3: Unneeded semicolon. Reported-by: Abaci Robot <abaci(a)linux.alibaba.com> Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=11407 Signed-off-by: Jiapeng Chong <jiapeng.chong(a)linux.alibaba.com> --- tools/testing/selftests/timers/nanosleep.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c index 252c6308c569..36f9b97f232a 100644 --- a/tools/testing/selftests/timers/nanosleep.c +++ b/tools/testing/selftests/timers/nanosleep.c @@ -60,7 +60,7 @@ char *clockstring(int clockid) return "CLOCK_BOOTTIME_ALARM"; case CLOCK_TAI: return "CLOCK_TAI"; - }; + } return "UNKNOWN_CLOCKID"; } -- 2.32.0.3.g01195cf9f

8 months, 2 weeks

2
3
0 0

[PATCH net-next v4 0/3] Threads support in proc connector

by Anjali Kulkarni

Recently we committed a fix to allow processes to receive notifications for non-zero exits via the process connector module. Commit is a4c9a56e6a2c. However, for threads, when it does a pthread_exit(&exit_status) call, the kernel is not aware of the exit status with which pthread_exit is called. It is sent by child thread to the parent process, if it is waiting in pthread_join(). Hence, for a thread exiting abnormally, kernel cannot send notifications to any listening processes. The exception to this is if the thread is sent a signal which it has not handled, and dies along with it's process as a result; for eg. SIGSEGV or SIGKILL. In this case, kernel is aware of the non-zero exit and sends a notification for it. For our use case, we cannot have parent wait in pthread_join, one of the main reasons for this being that we do not want to track normal pthread_exit(), which could be a very large number. We only want to be notified of any abnormal exits. Hence, threads are created with pthread_attr_t set to PTHREAD_CREATE_DETACHED. To fix this problem, we add a new type PROC_CN_MCAST_NOTIFY to proc connector API, which allows a thread to send it's exit status to kernel either when it needs to call pthread_exit() with non-zero value to indicate some error or from signal handler before pthread_exit(). We also need to filter packets with non-zero exit notifications futher based on instances, which can be identified by task names. Hence, added a comm field to the packet's struct proc_event, in which task->comm is stored. v3->v4 changes: - Reduce size of exit.log by removing unnecessary text. v2->v3 changes: - Handled comment by Liam Howlett to set hdev to NULL and add comment on it - Handled comment by Liam Howlett to combine functions for deleting+get and deleting into one. - Handled comment by Liam Howlett to remove extern in the functions defined in cn_hash_test.h - Some nits by Liam Howlett fixed. - Made threads.c automated, by having an exit.log file created by proc_filter.c, which threads.c checks to see if the values reported for thread exits are correct. This was for a comment by Liam Howlett to make the tests automated. - Added "comm" field to struct proc_event, to copy the task's name to the packet to allow further filtering by packets. v1->v2 changes: - Handled comment by Peter Zijlstra to remove locking for PF_EXIT_NOTIFY task->flags. - Added error handling in thread.c v->v1 changes: - Handled comment by Simon Horman to remove unused err in cn_proc.c - Handled comment by Simon Horman to make adata and key_display static in cn_hash_test.c Anjali Kulkarni (3): connector/cn_proc: Add hash table for threads connector/cn_proc: Kunit tests for threads hash table connector/cn_proc: Selftest for threads drivers/connector/Makefile | 2 +- drivers/connector/cn_hash.c | 221 ++++++++++++++++++ drivers/connector/cn_proc.c | 62 ++++- drivers/connector/connector.c | 75 +++++- include/linux/connector.h | 35 +++ include/linux/sched.h | 2 +- include/uapi/linux/cn_proc.h | 5 +- lib/Kconfig.debug | 17 ++ lib/Makefile | 1 + lib/cn_hash_test.c | 167 +++++++++++++ lib/cn_hash_test.h | 10 + tools/testing/selftests/connector/Makefile | 23 +- .../testing/selftests/connector/proc_filter.c | 34 ++- tools/testing/selftests/connector/thread.c | 202 ++++++++++++++++ .../selftests/connector/thread_filter.c | 96 ++++++++ 15 files changed, 937 insertions(+), 15 deletions(-) create mode 100644 drivers/connector/cn_hash.c create mode 100644 lib/cn_hash_test.c create mode 100644 lib/cn_hash_test.h create mode 100644 tools/testing/selftests/connector/thread.c create mode 100644 tools/testing/selftests/connector/thread_filter.c -- 2.46.0

8 months, 2 weeks

2
5
0 0

[PATCH net-next v3 0/3] Threads support in proc connector

by Anjali Kulkarni

Recently we committed a fix to allow processes to receive notifications for non-zero exits via the process connector module. Commit is a4c9a56e6a2c. However, for threads, when it does a pthread_exit(&exit_status) call, the kernel is not aware of the exit status with which pthread_exit is called. It is sent by child thread to the parent process, if it is waiting in pthread_join(). Hence, for a thread exiting abnormally, kernel cannot send notifications to any listening processes. The exception to this is if the thread is sent a signal which it has not handled, and dies along with it's process as a result; for eg. SIGSEGV or SIGKILL. In this case, kernel is aware of the non-zero exit and sends a notification for it. For our use case, we cannot have parent wait in pthread_join, one of the main reasons for this being that we do not want to track normal pthread_exit(), which could be a very large number. We only want to be notified of any abnormal exits. Hence, threads are created with pthread_attr_t set to PTHREAD_CREATE_DETACHED. To fix this problem, we add a new type PROC_CN_MCAST_NOTIFY to proc connector API, which allows a thread to send it's exit status to kernel either when it needs to call pthread_exit() with non-zero value to indicate some error or from signal handler before pthread_exit(). We also need to filter packets with non-zero exit notifications futher based on instances, which can be identified by task names. Hence, added a comm field to the packet's struct proc_event, in which task->comm is stored. v2->v3 changes: - Handled comment by Liam Howlett to set hdev to NULL and add comment on it - Handled comment by Liam Howlett to combine functions for deleting+get and deleting into one. - Handled comment by Liam Howlett to remove extern in the functions defined in cn_hash_test.h - Some nits by Liam Howlett fixed. - Made threads.c automated, by having an exit.log file created by proc_filter.c, which threads.c checks to see if the values reported for thread exits are correct. This was for a comment by Liam Howlett to make the tests automated. - Added "comm" field to struct proc_event, to copy the task's name to the packet to allow further filtering by packets. v1->v2 changes: - Handled comment by Peter Zijlstra to remove locking for PF_EXIT_NOTIFY task->flags. - Added error handling in thread.c v->v1 changes: - Handled comment by Simon Horman to remove unused err in cn_proc.c - Handled comment by Simon Horman to make adata and key_display static in cn_hash_test.c Anjali Kulkarni (3): connector/cn_proc: Add hash table for threads connector/cn_proc: Kunit tests for threads hash table connector/cn_proc: Selftest for threads drivers/connector/Makefile | 2 +- drivers/connector/cn_hash.c | 221 ++++++++++++++++++ drivers/connector/cn_proc.c | 62 ++++- drivers/connector/connector.c | 75 +++++- include/linux/connector.h | 35 +++ include/linux/sched.h | 2 +- include/uapi/linux/cn_proc.h | 5 +- lib/Kconfig.debug | 17 ++ lib/Makefile | 1 + lib/cn_hash_test.c | 167 +++++++++++++ lib/cn_hash_test.h | 10 + tools/testing/selftests/connector/Makefile | 23 +- .../testing/selftests/connector/proc_filter.c | 34 ++- tools/testing/selftests/connector/thread.c | 202 ++++++++++++++++ .../selftests/connector/thread_filter.c | 96 ++++++++ 15 files changed, 937 insertions(+), 15 deletions(-) create mode 100644 drivers/connector/cn_hash.c create mode 100644 lib/cn_hash_test.c create mode 100644 lib/cn_hash_test.h create mode 100644 tools/testing/selftests/connector/thread.c create mode 100644 tools/testing/selftests/connector/thread_filter.c -- 2.46.0

8 months, 2 weeks

2
4
0 0

[PATCH v5 00/30] Permission Overlay Extension

by Joey Gouly

Hi all, This series implements the Permission Overlay Extension introduced in 2022 VMSA enhancements [1]. It is based on v6.11-rc4. Changes since v4[2]: - Added Acks and R-bs, thanks! - KVM: - Move POR_EL{0,1} handling inside TCR_EL2 blocks - Add visibility functions for registers [4] - Make ID_AA64MMFR3_EL1 writable - use system_supports_poe() more consistently - use BIT instead of hex constants - fix off-by-one in arch_max_pkey() macro - add PKEY_DISABLE_EXECUTE and PKEY_DISABLE_READ - Update some comments and commit messages. - No change to when we save/restore POR_EL0 for signals! Conflicts with GCS: - Uses the same (last) bit in HWCAP2 - Uses the same VM_HIGH_ARCH_5 Conflicts with arm64 KVM: - Maz has taken patch 8 into one of his own series - I have taken and modified a patch from Maz (patch 9) The Permission Overlay Extension allows to constrain permissions on memory regions. This can be used from userspace (EL0) without a system call or TLB invalidation. POE is used to implement the Memory Protection Keys [3] Linux syscall. The first few patches add the basic framework, then the PKEYS interface is implemented, and then the selftests are made to work on arm64. I have tested the modified protection_keys test on x86_64, but not PPC. I haven't build tested the x86/ppc arch changes. Thanks, Joey [1] https://community.arm.com/arm-community-blogs/b/architectures-and-processor… [2] https://lore.kernel.org/linux-arm-kernel/20240503130147.1154804-1-joey.goul… [3] Documentation/core-api/protection-keys.rst [4] https://lore.kernel.org/linux-arm-kernel/20240806-kvm-arm64-get-reg-list-v2… Joey Gouly (30): powerpc/mm: add ARCH_PKEY_BITS to Kconfig x86/mm: add ARCH_PKEY_BITS to Kconfig mm: use ARCH_PKEY_BITS to define VM_PKEY_BITN arm64: disable trapping of POR_EL0 to EL2 arm64: cpufeature: add Permission Overlay Extension cpucap arm64: context switch POR_EL0 register KVM: arm64: Save/restore POE registers KVM: arm64: make kvm_at() take an OP_AT_* KVM: arm64: use `at s1e1a` for POE KVM: arm64: Sanitise ID_AA64MMFR3_EL1 arm64: enable the Permission Overlay Extension for EL0 arm64: re-order MTE VM_ flags arm64: add POIndex defines arm64: convert protection key into vm_flags and pgprot values arm64: mask out POIndex when modifying a PTE arm64: handle PKEY/POE faults arm64: add pte_access_permitted_no_overlay() arm64: implement PKEYS support arm64: add POE signal support arm64/ptrace: add support for FEAT_POE arm64: enable POE and PIE to coexist arm64: enable PKEY support for CPUs with S1POE arm64: add Permission Overlay Extension Kconfig kselftest/arm64: move get_header() selftests: mm: move fpregs printing selftests: mm: make protection_keys test work on arm64 kselftest/arm64: add HWCAP test for FEAT_S1POE kselftest/arm64: parse POE_MAGIC in a signal frame kselftest/arm64: Add test case for POR_EL0 signal frame records KVM: selftests: get-reg-list: add Permission Overlay registers Documentation/arch/arm64/elf_hwcaps.rst | 2 + arch/arm64/Kconfig | 23 +++ arch/arm64/include/asm/cpufeature.h | 6 + arch/arm64/include/asm/el2_setup.h | 10 +- arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/asm/kvm_asm.h | 3 +- arch/arm64/include/asm/kvm_host.h | 4 + arch/arm64/include/asm/mman.h | 10 +- arch/arm64/include/asm/mmu.h | 1 + arch/arm64/include/asm/mmu_context.h | 46 +++++- arch/arm64/include/asm/pgtable-hwdef.h | 10 ++ arch/arm64/include/asm/pgtable-prot.h | 8 +- arch/arm64/include/asm/pgtable.h | 34 ++++- arch/arm64/include/asm/pkeys.h | 108 ++++++++++++++ arch/arm64/include/asm/por.h | 33 +++++ arch/arm64/include/asm/processor.h | 1 + arch/arm64/include/asm/sysreg.h | 3 + arch/arm64/include/asm/traps.h | 1 + arch/arm64/include/asm/vncr_mapping.h | 1 + arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/mman.h | 9 ++ arch/arm64/include/uapi/asm/sigcontext.h | 7 + arch/arm64/kernel/cpufeature.c | 23 +++ arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/kernel/process.c | 28 ++++ arch/arm64/kernel/ptrace.c | 46 ++++++ arch/arm64/kernel/signal.c | 62 ++++++++ arch/arm64/kernel/traps.c | 6 + arch/arm64/kvm/hyp/include/hyp/fault.h | 5 +- arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 27 ++++ arch/arm64/kvm/sys_regs.c | 25 +++- arch/arm64/mm/fault.c | 55 ++++++- arch/arm64/mm/mmap.c | 11 ++ arch/arm64/mm/mmu.c | 45 ++++++ arch/arm64/tools/cpucaps | 1 + arch/powerpc/Kconfig | 4 + arch/x86/Kconfig | 4 + fs/proc/task_mmu.c | 2 + include/linux/mm.h | 20 ++- include/uapi/linux/elf.h | 1 + tools/testing/selftests/arm64/abi/hwcap.c | 14 ++ .../testing/selftests/arm64/signal/.gitignore | 1 + .../arm64/signal/testcases/poe_siginfo.c | 86 +++++++++++ .../arm64/signal/testcases/testcases.c | 27 +--- .../arm64/signal/testcases/testcases.h | 28 +++- .../selftests/kvm/aarch64/get-reg-list.c | 14 ++ tools/testing/selftests/mm/Makefile | 2 +- tools/testing/selftests/mm/pkey-arm64.h | 139 ++++++++++++++++++ tools/testing/selftests/mm/pkey-helpers.h | 8 + tools/testing/selftests/mm/pkey-powerpc.h | 3 + tools/testing/selftests/mm/pkey-x86.h | 4 + tools/testing/selftests/mm/protection_keys.c | 109 ++++++++++++-- 52 files changed, 1060 insertions(+), 63 deletions(-) create mode 100644 arch/arm64/include/asm/pkeys.h create mode 100644 arch/arm64/include/asm/por.h create mode 100644 tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c create mode 100644 tools/testing/selftests/mm/pkey-arm64.h -- 2.25.1

8 months, 2 weeks

9
76
0 0

[PATCH v8 8/8] selftests/pcie_bwctrl: Create selftests

by Ilpo Järvinen

Create selftests for PCIe BW control through the PCIe cooling device sysfs interface. First, the BW control selftest finds the PCIe Port to test with. By default, the PCIe Port with the highest Link Speed is selected but another PCIe Port can be provided with -d parameter. The actual test steps the cur_state of the cooling device one-by-one from max_state to what the cur_state was initially. The speed change is confirmed by observing the current_link_speed for the corresponding PCIe Port. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> --- MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/pcie_bwctrl/Makefile | 2 + .../pcie_bwctrl/set_pcie_cooling_state.sh | 122 ++++++++++++++++++ .../selftests/pcie_bwctrl/set_pcie_speed.sh | 67 ++++++++++ 5 files changed, 193 insertions(+) create mode 100644 tools/testing/selftests/pcie_bwctrl/Makefile create mode 100755 tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh create mode 100755 tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh diff --git a/MAINTAINERS b/MAINTAINERS index 393ed7ce5ea1..d7ffef4382df 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17940,6 +17940,7 @@ S: Supported F: drivers/pci/pcie/bwctrl.c F: drivers/thermal/pcie_cooling.c F: include/linux/pci-bwctrl.h +F: tools/testing/selftests/pcie_bwctrl/ PCIE DRIVER FOR AMAZON ANNAPURNA LABS M: Jonathan Chocron <jonnyc(a)amazon.com> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..7181756f47ff 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -72,6 +72,7 @@ TARGETS += net/packetdrill TARGETS += net/rds TARGETS += net/tcp_ao TARGETS += nsfs +TARGETS += pcie_bwctrl TARGETS += perf_events TARGETS += pidfd TARGETS += pid_namespace diff --git a/tools/testing/selftests/pcie_bwctrl/Makefile b/tools/testing/selftests/pcie_bwctrl/Makefile new file mode 100644 index 000000000000..3e84e26341d1 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/Makefile @@ -0,0 +1,2 @@ +TEST_PROGS = set_pcie_cooling_state.sh +include ../lib.mk diff --git a/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh b/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh new file mode 100755 index 000000000000..9df606552af3 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh @@ -0,0 +1,122 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later + +SYSFS= +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +retval=0 +skipmsg="skip all tests:" + +PCIEPORTTYPE="PCIe_Port_Link_Speed" + +prerequisite() +{ + local ports + + if [ $UID != 0 ]; then + echo $skipmsg must be run as root >&2 + exit $ksft_skip + fi + + SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'` + + if [ ! -d "$SYSFS" ]; then + echo $skipmsg sysfs is not mounted >&2 + exit $ksft_skip + fi + + if ! ls $SYSFS/class/thermal/cooling_device* > /dev/null 2>&1; then + echo $skipmsg thermal cooling devices missing >&2 + exit $ksft_skip + fi + + ports=`grep -e "^$PCIEPORTTYPE" $SYSFS/class/thermal/cooling_device*/type | wc -l` + if [ $ports -eq 0 ]; then + echo $skipmsg pcie cooling devices missing >&2 + exit $ksft_skip + fi +} + +testport= +find_pcie_port() +{ + local patt="$1" + local pcieports + local max + local cur + local delta + local bestdelta=-1 + + pcieports=`grep -l -F -e "$patt" /sys/class/thermal/cooling_device*/type` + if [ -z "$pcieports" ]; then + return + fi + pcieports=${pcieports//\/type/} + # Find the port with the highest PCIe Link Speed + for port in $pcieports; do + max=`cat $port/max_state` + cur=`cat $port/cur_state` + delta=$((max-cur)) + if [ $delta -gt $bestdelta ]; then + testport="$port" + bestdelta=$delta + fi + done +} + +sysfspcidev= +find_sysfs_pci_dev() +{ + local typefile="$1/type" + local pcidir + + pcidir="$SYSFS/bus/pci/devices/`sed -e "s|^${PCIEPORTTYPE}_||g" $typefile`" + + if [ -r "$pcidir/current_link_speed" ]; then + sysfspcidev="$pcidir/current_link_speed" + fi +} + +usage() +{ + echo "Usage $0 [ -d dev ]" + echo -e "\t-d: PCIe port BDF string (e.g., 0000:00:04.0)" +} + +pattern="$PCIEPORTTYPE" +parse_arguments() +{ + while getopts d:h opt; do + case $opt in + h) + usage "$0" + exit 0 + ;; + d) + pattern="$PCIEPORTTYPE_$OPTARG" + ;; + *) + usage "$0" + exit 0 + ;; + esac + done +} + +parse_arguments "$@" +prerequisite +find_pcie_port "$pattern" +if [ -z "$testport" ]; then + echo $skipmsg "pcie cooling device not found from sysfs" >&2 + exit $ksft_skip +fi +find_sysfs_pci_dev "$testport" +if [ -z "$sysfspcidev" ]; then + echo $skipmsg "PCIe port device not found from sysfs" >&2 + exit $ksft_skip +fi + +./set_pcie_speed.sh "$testport" "$sysfspcidev" +retval=$? + +exit $retval diff --git a/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh b/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh new file mode 100755 index 000000000000..584596949312 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh @@ -0,0 +1,67 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later + +set -e + +TESTNAME=set_pcie_speed + +declare -a PCIELINKSPEED=( + "2.5 GT/s PCIe" + "5.0 GT/s PCIe" + "8.0 GT/s PCIe" + "16.0 GT/s PCIe" + "32.0 GT/s PCIe" + "64.0 GT/s PCIe" +) + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +retval=0 + +coolingdev="$1" +statefile="$coolingdev/cur_state" +maxfile="$coolingdev/max_state" +linkspeedfile="$2" + +oldstate=`cat $statefile` +maxstate=`cat $maxfile` + +set_state() +{ + local state=$1 + local linkspeed + local expected_linkspeed + + echo $state > $statefile + + sleep 1 + + linkspeed="`cat $linkspeedfile`" + expected_linkspeed=$((maxstate-state)) + expected_str="${PCIELINKSPEED[$expected_linkspeed]}" + if [ ! "${expected_str}" = "${linkspeed}" ]; then + echo "$TESTNAME failed: expected: ${expected_str}; got ${linkspeed}" + retval=1 + fi +} + +cleanup_skip () +{ + set_state $oldstate + exit $ksft_skip +} + +trap cleanup_skip EXIT + +echo "$TESTNAME: testing states $maxstate .. $oldstate with $coolingdev" +for i in $(seq $maxstate -1 $oldstate); do + set_state "$i" +done + +trap EXIT +if [ $retval -eq 0 ]; then + echo "$TESTNAME [PASS]" +else + echo "$TESTNAME [FAIL]" +fi +exit $retval -- 2.39.5

8 months, 2 weeks

2
1
0 0

[PATCH v2] selftests: clone3: Use the capget and capset syscall directly

by zhouyuhang

From: zhouyuhang <zhouyuhang(a)kylinos.cn> The libcap commit aca076443591 ("Make cap_t operations thread safe.") added a __u8 mutex at the beginning of the struct _cap_struct, it changes the offset of the members in the structure that breaks the assumption made in the "struct libcap" definition in clone3_cap_checkpoint_restore.c. This will make the test fail. So use the capget and capset syscall directly and remove the libcap library dependency like the commit 663af70aabb7 ("bpf: selftests: Add helpers to directly use the capget and capset syscall") does. Signed-off-by: zhouyuhang <zhouyuhang(a)kylinos.cn> --- tools/testing/selftests/clone3/Makefile | 1 - .../clone3/clone3_cap_checkpoint_restore.c | 53 ++++++++----------- .../selftests/clone3/clone3_cap_helpers.h | 23 ++++++++ 3 files changed, 44 insertions(+), 33 deletions(-) create mode 100644 tools/testing/selftests/clone3/clone3_cap_helpers.h diff --git a/tools/testing/selftests/clone3/Makefile b/tools/testing/selftests/clone3/Makefile index 84832c369a2e..59d26e8da8d2 100644 --- a/tools/testing/selftests/clone3/Makefile +++ b/tools/testing/selftests/clone3/Makefile @@ -1,6 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 CFLAGS += -g -std=gnu99 $(KHDR_INCLUDES) -LDLIBS += -lcap TEST_GEN_PROGS := clone3 clone3_clear_sighand clone3_set_tid \ clone3_cap_checkpoint_restore diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c index 3c196fa86c99..242088eeec88 100644 --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c @@ -15,7 +15,6 @@ #include <stdio.h> #include <stdlib.h> #include <stdbool.h> -#include <sys/capability.h> #include <sys/prctl.h> #include <sys/syscall.h> #include <sys/types.h> @@ -26,6 +25,7 @@ #include "../kselftest_harness.h" #include "clone3_selftests.h" +#include "clone3_cap_helpers.h" static void child_exit(int ret) { @@ -87,47 +87,36 @@ static int test_clone3_set_tid(struct __test_metadata *_metadata, return ret; } -struct libcap { - struct __user_cap_header_struct hdr; - struct __user_cap_data_struct data[2]; -}; - static int set_capability(void) { - cap_value_t cap_values[] = { CAP_SETUID, CAP_SETGID }; - struct libcap *cap; - int ret = -1; - cap_t caps; - - caps = cap_get_proc(); - if (!caps) { - perror("cap_get_proc"); + struct __user_cap_data_struct data[2]; + struct __user_cap_header_struct hdr = { + .version = _LINUX_CAPABILITY_VERSION_3, + }; + __u32 cap0 = 1 << CAP_SETUID | 1 << CAP_SETGID; + __u32 cap1 = 1 << (CAP_CHECKPOINT_RESTORE - 32); + int ret; + + ret = capget(&hdr, data); + if (ret) { + perror("capget"); return -1; } /* Drop all capabilities */ - if (cap_clear(caps)) { - perror("cap_clear"); - goto out; - } + memset(&data, 0, sizeof(data)); - cap_set_flag(caps, CAP_EFFECTIVE, 2, cap_values, CAP_SET); - cap_set_flag(caps, CAP_PERMITTED, 2, cap_values, CAP_SET); + data[0].effective |= cap0; + data[0].permitted |= cap0; - cap = (struct libcap *) caps; + data[1].effective |= cap1; + data[1].permitted |= cap1; - /* 40 -> CAP_CHECKPOINT_RESTORE */ - cap->data[1].effective |= 1 << (40 - 32); - cap->data[1].permitted |= 1 << (40 - 32); - - if (cap_set_proc(caps)) { - perror("cap_set_proc"); - goto out; + ret = capset(&hdr, data); + if (ret) { + perror("capset"); + return -1; } - ret = 0; -out: - if (cap_free(caps)) - perror("cap_free"); return ret; } diff --git a/tools/testing/selftests/clone3/clone3_cap_helpers.h b/tools/testing/selftests/clone3/clone3_cap_helpers.h new file mode 100644 index 000000000000..3fa59ef68fb8 --- /dev/null +++ b/tools/testing/selftests/clone3/clone3_cap_helpers.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __CLONE3_CAP_HELPERS_H +#define __CLONE3_CAP_HELPERS_H + +#include <linux/capability.h> + +/* + * Compatible with older version + * header file without defined + * CAP_CHECKPOINT_RESTORE. + */ +#ifndef CAP_CHECKPOINT_RESTORE +#define CAP_CHECKPOINT_RESTORE 40 +#endif + +/* + * Removed the libcap library dependency. + * So declare them here directly. + */ +int capget(cap_user_header_t header, cap_user_data_t data); +int capset(cap_user_header_t header, const cap_user_data_t data); + +#endif -- 2.27.0

8 months, 2 weeks

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[PATCH] selftests: mm: fix the incorrect usage() info of khugepaged

by Nanyong Sun

The mount option of tmpfs should be huge=advise, not madvise which is not supported and may mislead the users. Fixes: 1b03d0d558a2 ("selftests/vm: add thp collapse file and tmpfs testing") Signed-off-by: Nanyong Sun <sunnanyong(a)huawei.com> --- tools/testing/selftests/mm/khugepaged.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c index 56d4480e8d3c..8a4d34cce36b 100644 --- a/tools/testing/selftests/mm/khugepaged.c +++ b/tools/testing/selftests/mm/khugepaged.c @@ -1091,7 +1091,7 @@ static void usage(void) fprintf(stderr, "\n\t\"file,all\" mem_type requires kernel built with\n"); fprintf(stderr, "\tCONFIG_READ_ONLY_THP_FOR_FS=y\n"); fprintf(stderr, "\n\tif [dir] is a (sub)directory of a tmpfs mount, tmpfs must be\n"); - fprintf(stderr, "\tmounted with huge=madvise option for khugepaged tests to work\n"); + fprintf(stderr, "\tmounted with huge=advise option for khugepaged tests to work\n"); fprintf(stderr, "\n\tSupported Options:\n"); fprintf(stderr, "\t\t-h: This help message.\n"); fprintf(stderr, "\t\t-s: mTHP size, expressed as page order.\n"); -- 2.33.0

8 months, 2 weeks

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kselftest/fixes build: 4 builds: 1 failed, 3 passed, 1 warning (linux_kselftest-fixes-6.12-rc3-1-gfe05c40ca9c1)

by kernelci.org bot

kselftest/fixes build: 4 builds: 1 failed, 3 passed, 1 warning (linux_kselftest-fixes-6.12-rc3-1-gfe05c40ca9c1) Full Build Summary: https://kernelci.org/build/kselftest/branch/fixes/kernel/linux_kselftest-fi… Tree: kselftest Branch: fixes Git Describe: linux_kselftest-fixes-6.12-rc3-1-gfe05c40ca9c1 Git Commit: fe05c40ca9c18cfdb003f639a30fc78a7ab49519 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failure Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

8 months, 2 weeks

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[PATCH v2] selftest: hid: add the missing tests directory

by Yun Lu

Commit 160c826b4dd0 ("selftest: hid: add missing run-hid-tools-tests.sh") has added the run-hid-tools-tests.sh script for it to be installed, but I forgot to add the tests directory together. If running the test case without the tests directory, will results in the following error message: make -C tools/testing/selftests/ TARGETS=hid install \ INSTALL_PATH=$KSFT_INSTALL_PATH cd $KSFT_INSTALL_PATH ./run_kselftest.sh -t hid:hid-core.sh /usr/lib/python3.11/site-packages/_pytest/config/__init__.py:331: PluggyTeardownRaisedWarning: A plugin raised an exception during an old-style hookwrapper teardown. Plugin: helpconfig, Hook: pytest_cmdline_parse UsageError: usage: __main__.py [options] [file_or_dir] [file_or_dir] [...] __main__.py: error: unrecognized arguments: --udevd inifile: None rootdir: /root/linux/kselftest_install/hid In fact, the run-hid-tools-tests.sh script uses the scripts in the tests directory to run tests. The tests directory also needs to be added to be installed. v2: add the error message Fixes: ffb85d5c9e80 ("selftests: hid: import hid-tools hid-core tests") Cc: stable(a)vger.kernel.org Signed-off-by: Yun Lu <luyun(a)kylinos.cn> --- tools/testing/selftests/hid/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile index 38ae31bb07b5..662209f5fabc 100644 --- a/tools/testing/selftests/hid/Makefile +++ b/tools/testing/selftests/hid/Makefile @@ -18,6 +18,7 @@ TEST_PROGS += hid-usb_crash.sh TEST_PROGS += hid-wacom.sh TEST_FILES := run-hid-tools-tests.sh +TEST_FILES += tests CXX ?= $(CROSS_COMPILE)g++ -- 2.27.0

8 months, 2 weeks

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[PATCH v2 0/3] introduce PIDFD_SELF* sentinels

by Lorenzo Stoakes

If you wish to utilise a pidfd interface to refer to the current process or thread it is rather cumbersome, requiring something like: int pidfd = pidfd_open(getpid(), 0 or PIDFD_THREAD); ... close(pidfd); Or the equivalent call opening /proc/self. It is more convenient to use a sentinel value to indicate to an interface that accepts a pidfd that we simply wish to refer to the current process thread. This series introduces sentinels for this purposes which can be passed as the pidfd in this instance rather than having to establish a dummy fd for this purpose. It is useful to refer to both the current thread from the userland's perspective for which we use PIDFD_SELF, and the current process from the userland's perspective, for which we use PIDFD_SELF_PROCESS. There is unfortunately some confusion between the kernel and userland as to what constitutes a process - a thread from the userland perspective is a process in userland, and a userland process is a thread group (more specifically the thread group leader from the kernel perspective). We therefore alias things thusly: * PIDFD_SELF_THREAD aliased by PIDFD_SELF - use PIDTYPE_PID. * PIDFD_SELF_THREAD_GROUP alised by PIDFD_SELF_PROCESS - use PIDTYPE_TGID. In all of the kernel code we refer to PIDFD_SELF_THREAD and PIDFD_SELF_THREAD_GROUP. However we expect users to use PIDFD_SELF and PIDFD_SELF_PROCESS. This matters for cases where, for instance, a user unshare()'s FDs or does thread-specific signal handling and where the user would be hugely confused if the FDs referenced or signal processed referred to the thread group leader rather than the individual thread. We ensure that pidfd_send_signal() and pidfd_getfd() work correctly, and assert as much in selftests. All other interfaces except setns() will work implicitly with this new interface, however it doesn't make sense to test waitid(P_PIDFD, ...) as waiting on ourselves is a blocking operation. In the case of setns() we explicitly disallow use of PIDFD_SELF* as it doesn't make sense to obtain the namespaces of our own process, and it would require work to implement this functionality there that would be of no use. We also do not provide the ability to utilise PIDFD_SELF* in ordinary fd operations such as open() or poll(), as this would require extensive work and be of no real use. v2: * Fix tests as reported by Shuah. * Correct RFC version lore link. Non-RFC v1: * Removed RFC tag - there seems to be general consensus that this change is a good idea, but perhaps some debate to be had on implementation. It seems sensible then to move forward with the RFC flag removed. * Introduced PIDFD_SELF_THREAD, PIDFD_SELF_THREAD_GROUP and their aliases PIDFD_SELF and PIDFD_SELF_PROCESS respectively. * Updated testing accordingly. https://lore.kernel.org/linux-mm/cover.1728578231.git.lorenzo.stoakes@oracl… RFC version: https://lore.kernel.org/linux-mm/cover.1727644404.git.lorenzo.stoakes@oracl… Lorenzo Stoakes (3): pidfd: extend pidfd_get_pid() and de-duplicate pid lookup pidfd: add PIDFD_SELF_* sentinels to refer to own thread/process selftests: pidfd: add tests for PIDFD_SELF_* include/linux/pid.h | 43 +++++- include/uapi/linux/pidfd.h | 15 ++ kernel/exit.c | 3 +- kernel/nsproxy.c | 1 + kernel/pid.c | 73 ++++++--- kernel/signal.c | 22 +-- tools/testing/selftests/pidfd/pidfd.h | 8 + .../selftests/pidfd/pidfd_getfd_test.c | 141 ++++++++++++++++++ .../selftests/pidfd/pidfd_setns_test.c | 11 ++ tools/testing/selftests/pidfd/pidfd_test.c | 76 ++++++++-- 10 files changed, 341 insertions(+), 52 deletions(-) -- 2.46.2

8 months, 2 weeks

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[PATCH 0/3] introduce PIDFD_SELF* sentinels

by Lorenzo Stoakes

If you wish to utilise a pidfd interface to refer to the current process or thread it is rather cumbersome, requiring something like: int pidfd = pidfd_open(getpid(), 0 or PIDFD_THREAD); ... close(pidfd); Or the equivalent call opening /proc/self. It is more convenient to use a sentinel value to indicate to an interface that accepts a pidfd that we simply wish to refer to the current process thread. This series introduces sentinels for this purposes which can be passed as the pidfd in this instance rather than having to establish a dummy fd for this purpose. It is useful to refer to both the current thread from the userland's perspective for which we use PIDFD_SELF, and the current process from the userland's perspective, for which we use PIDFD_SELF_PROCESS. There is unfortunately some confusion between the kernel and userland as to what constitutes a process - a thread from the userland perspective is a process in userland, and a userland process is a thread group (more specifically the thread group leader from the kernel perspective). We therefore alias things thusly: * PIDFD_SELF_THREAD aliased by PIDFD_SELF - use PIDTYPE_PID. * PIDFD_SELF_THREAD_GROUP alised by PIDFD_SELF_PROCESS - use PIDTYPE_TGID. In all of the kernel code we refer to PIDFD_SELF_THREAD and PIDFD_SELF_THREAD_GROUP. However we expect users to use PIDFD_SELF and PIDFD_SELF_PROCESS. This matters for cases where, for instance, a user unshare()'s FDs or does thread-specific signal handling and where the user would be hugely confused if the FDs referenced or signal processed referred to the thread group leader rather than the individual thread. We ensure that pidfd_send_signal() and pidfd_getfd() work correctly, and assert as much in selftests. All other interfaces except setns() will work implicitly with this new interface, however it doesn't make sense to test waitid(P_PIDFD, ...) as waiting on ourselves is a blocking operation. In the case of setns() we explicitly disallow use of PIDFD_SELF* as it doesn't make sense to obtain the namespaces of our own process, and it would require work to implement this functionality there that would be of no use. We also do not provide the ability to utilise PIDFD_SELF* in ordinary fd operations such as open() or poll(), as this would require extensive work and be of no real use. Non-RFC v1: * Removed RFC tag - there seems to be general consensus that this change is a good idea, but perhaps some debate to be had on implementation. It seems sensible then to move forward with the RFC flag removed. * Introduced PIDFD_SELF_THREAD, PIDFD_SELF_THREAD_GROUP and their aliases PIDFD_SELF and PIDFD_SELF_PROCESS respectively. * Updated testing accordingly. RFC version: https://lore.kernel.org/linux-mm/1d19f18c-5a60-44b5-a96f-9d0e74f2b02c@lucif… Lorenzo Stoakes (3): pidfd: extend pidfd_get_pid() and de-duplicate pid lookup pidfd: add PIDFD_SELF_* sentinels to refer to own thread/process selftests: pidfd: add tests for PIDFD_SELF_* include/linux/pid.h | 43 +++++- include/uapi/linux/pidfd.h | 15 ++ kernel/exit.c | 3 +- kernel/nsproxy.c | 1 + kernel/pid.c | 73 +++++++--- kernel/signal.c | 22 +-- tools/testing/selftests/pidfd/pidfd.h | 8 ++ .../selftests/pidfd/pidfd_getfd_test.c | 136 ++++++++++++++++++ .../selftests/pidfd/pidfd_setns_test.c | 11 ++ tools/testing/selftests/pidfd/pidfd_test.c | 67 +++++++-- 10 files changed, 330 insertions(+), 49 deletions(-) -- 2.46.2

8 months, 2 weeks

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[PATCH net-next v2 0/3] Threads support in proc connector

by Anjali Kulkarni

Recently we committed a fix to allow processes to receive notifications for non-zero exits via the process connector module. Commit is a4c9a56e6a2c. However, for threads, when it does a pthread_exit(&exit_status) call, the kernel is not aware of the exit status with which pthread_exit is called. It is sent by child thread to the parent process, if it is waiting in pthread_join(). Hence, for a thread exiting abnormally, kernel cannot send notifications to any listening processes. The exception to this is if the thread is sent a signal which it has not handled, and dies along with it's process as a result; for eg. SIGSEGV or SIGKILL. In this case, kernel is aware of the non-zero exit and sends a notification for it. For our use case, we cannot have parent wait in pthread_join, one of the main reasons for this being that we do not want to track normal pthread_exit(), which could be a very large number. We only want to be notified of any abnormal exits. Hence, threads are created with pthread_attr_t set to PTHREAD_CREATE_DETACHED. To fix this problem, we add a new type PROC_CN_MCAST_NOTIFY to proc connector API, which allows a thread to send it's exit status to kernel either when it needs to call pthread_exit() with non-zero value to indicate some error or from signal handler before pthread_exit(). v1->v2 changes: - Handled comment by Peter Zijlstra to remove locking for PF_EXIT_NOTIFY task->flags. - Added error handling in thread.c v->v1 changes: - Handled comment by Simon Horman to remove unused err in cn_proc.c - Handled comment by Simon Horman to make adata and key_display static in cn_hash_test.c Anjali Kulkarni (3): connector/cn_proc: Add hash table for threads connector/cn_proc: Kunit tests for threads hash table connector/cn_proc: Selftest for threads drivers/connector/Makefile | 2 +- drivers/connector/cn_hash.c | 240 ++++++++++++++++++ drivers/connector/cn_proc.c | 55 +++- drivers/connector/connector.c | 96 ++++++- include/linux/connector.h | 47 ++++ include/linux/sched.h | 2 +- include/uapi/linux/cn_proc.h | 4 +- lib/Kconfig.debug | 17 ++ lib/Makefile | 1 + lib/cn_hash_test.c | 167 ++++++++++++ lib/cn_hash_test.h | 12 + tools/testing/selftests/connector/Makefile | 23 +- .../testing/selftests/connector/proc_filter.c | 5 + tools/testing/selftests/connector/thread.c | 116 +++++++++ .../selftests/connector/thread_filter.c | 96 +++++++ 15 files changed, 873 insertions(+), 10 deletions(-) create mode 100644 drivers/connector/cn_hash.c create mode 100644 lib/cn_hash_test.c create mode 100644 lib/cn_hash_test.h create mode 100644 tools/testing/selftests/connector/thread.c create mode 100644 tools/testing/selftests/connector/thread_filter.c -- 2.46.0

8 months, 2 weeks

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[v6 PATCH 1/2] hugetlb: arm64: add mte support

by Yang Shi

Enable MTE support for hugetlb. The MTE page flags will be set on the folio only. When copying hugetlb folio (for example, CoW), the tags for all subpages will be copied when copying the first subpage. When freeing hugetlb folio, the MTE flags will be cleared. Reviewed-by: Catalin Marinas <catalin.marinas(a)arm.com> Reviewed-by: David Hildenbrand <david(a)redhat.com> Signed-off-by: Yang Shi <yang(a)os.amperecomputing.com> --- arch/arm64/include/asm/hugetlb.h | 8 ++++ arch/arm64/include/asm/mman.h | 3 +- arch/arm64/include/asm/mte.h | 67 ++++++++++++++++++++++++++++++++ arch/arm64/kernel/hibernate.c | 6 +++ arch/arm64/kernel/mte.c | 27 ++++++++++++- arch/arm64/kvm/guest.c | 16 ++++++-- arch/arm64/kvm/mmu.c | 11 ++++++ arch/arm64/mm/copypage.c | 27 ++++++++++++- fs/hugetlbfs/inode.c | 2 +- 9 files changed, 159 insertions(+), 8 deletions(-) v6: * Rebased onto v6.12-rc1. * Fixed the trivial comments from David. * Collected the review tags from Catalin and David. v5: * Indentation fix and renaming per Catalin. v4: * Fixed the comment from David. v3: * Fixed the build error when !CONFIG_ARM64_MTE. * Incorporated the comment from David to have hugetlb folio specific APIs for manipulating the page flags. * Don't assume the first page is the head page since huge page copy can start from any subpage. v2: * Reimplemented the patch to fix the comments from Catalin. * Added test cases (patch #2) per Catalin. diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h index 293f880865e8..c6dff3e69539 100644 --- a/arch/arm64/include/asm/hugetlb.h +++ b/arch/arm64/include/asm/hugetlb.h @@ -11,6 +11,7 @@ #define __ASM_HUGETLB_H #include <asm/cacheflush.h> +#include <asm/mte.h> #include <asm/page.h> #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION @@ -21,6 +22,13 @@ extern bool arch_hugetlb_migration_supported(struct hstate *h); static inline void arch_clear_hugetlb_flags(struct folio *folio) { clear_bit(PG_dcache_clean, &folio->flags); + +#ifdef CONFIG_ARM64_MTE + if (system_supports_mte()) { + clear_bit(PG_mte_tagged, &folio->flags); + clear_bit(PG_mte_lock, &folio->flags); + } +#endif } #define arch_clear_hugetlb_flags arch_clear_hugetlb_flags diff --git a/arch/arm64/include/asm/mman.h b/arch/arm64/include/asm/mman.h index 9e39217b4afb..65bc2b07f666 100644 --- a/arch/arm64/include/asm/mman.h +++ b/arch/arm64/include/asm/mman.h @@ -38,7 +38,8 @@ static inline unsigned long arch_calc_vm_flag_bits(unsigned long flags) * backed by tags-capable memory. The vm_flags may be overridden by a * filesystem supporting MTE (RAM-based). */ - if (system_supports_mte() && (flags & MAP_ANONYMOUS)) + if (system_supports_mte() && + (flags & (MAP_ANONYMOUS | MAP_HUGETLB))) return VM_MTE_ALLOWED; return 0; diff --git a/arch/arm64/include/asm/mte.h b/arch/arm64/include/asm/mte.h index 0f84518632b4..6567df8ec8ca 100644 --- a/arch/arm64/include/asm/mte.h +++ b/arch/arm64/include/asm/mte.h @@ -41,6 +41,8 @@ void mte_free_tag_storage(char *storage); static inline void set_page_mte_tagged(struct page *page) { + VM_WARN_ON_ONCE(folio_test_hugetlb(page_folio(page))); + /* * Ensure that the tags written prior to this function are visible * before the page flags update. @@ -53,6 +55,8 @@ static inline bool page_mte_tagged(struct page *page) { bool ret = test_bit(PG_mte_tagged, &page->flags); + VM_WARN_ON_ONCE(folio_test_hugetlb(page_folio(page))); + /* * If the page is tagged, ensure ordering with a likely subsequent * read of the tags. @@ -76,6 +80,8 @@ static inline bool page_mte_tagged(struct page *page) */ static inline bool try_page_mte_tagging(struct page *page) { + VM_WARN_ON_ONCE(folio_test_hugetlb(page_folio(page))); + if (!test_and_set_bit(PG_mte_lock, &page->flags)) return true; @@ -157,6 +163,67 @@ static inline int mte_ptrace_copy_tags(struct task_struct *child, #endif /* CONFIG_ARM64_MTE */ +#if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_ARM64_MTE) +static inline void folio_set_hugetlb_mte_tagged(struct folio *folio) +{ + VM_WARN_ON_ONCE(!folio_test_hugetlb(folio)); + + /* + * Ensure that the tags written prior to this function are visible + * before the folio flags update. + */ + smp_wmb(); + set_bit(PG_mte_tagged, &folio->flags); + +} + +static inline bool folio_test_hugetlb_mte_tagged(struct folio *folio) +{ + bool ret = test_bit(PG_mte_tagged, &folio->flags); + + VM_WARN_ON_ONCE(!folio_test_hugetlb(folio)); + + /* + * If the folio is tagged, ensure ordering with a likely subsequent + * read of the tags. + */ + if (ret) + smp_rmb(); + return ret; +} + +static inline bool folio_try_hugetlb_mte_tagging(struct folio *folio) +{ + VM_WARN_ON_ONCE(!folio_test_hugetlb(folio)); + + if (!test_and_set_bit(PG_mte_lock, &folio->flags)) + return true; + + /* + * The tags are either being initialised or may have been initialised + * already. Check if the PG_mte_tagged flag has been set or wait + * otherwise. + */ + smp_cond_load_acquire(&folio->flags, VAL & (1UL << PG_mte_tagged)); + + return false; +} +#else +static inline void folio_set_hugetlb_mte_tagged(struct folio *folio) +{ +} + +static inline bool folio_test_hugetlb_mte_tagged(struct folio *folio) +{ + return false; +} + +static inline bool folio_try_hugetlb_mte_tagging(struct folio *folio) +{ + return false; +} +#endif + static inline void mte_disable_tco_entry(struct task_struct *task) { if (!system_supports_mte()) diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c index 7b11d84f533c..18749e9a6c2d 100644 --- a/arch/arm64/kernel/hibernate.c +++ b/arch/arm64/kernel/hibernate.c @@ -266,9 +266,15 @@ static int swsusp_mte_save_tags(void) max_zone_pfn = zone_end_pfn(zone); for (pfn = zone->zone_start_pfn; pfn < max_zone_pfn; pfn++) { struct page *page = pfn_to_online_page(pfn); + struct folio *folio; if (!page) continue; + folio = page_folio(page); + + if (folio_test_hugetlb(folio) && + !folio_test_hugetlb_mte_tagged(folio)) + continue; if (!page_mte_tagged(page)) continue; diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c index 6174671be7c1..2fbfd27ff5f2 100644 --- a/arch/arm64/kernel/mte.c +++ b/arch/arm64/kernel/mte.c @@ -38,7 +38,24 @@ EXPORT_SYMBOL_GPL(mte_async_or_asymm_mode); void mte_sync_tags(pte_t pte, unsigned int nr_pages) { struct page *page = pte_page(pte); - unsigned int i; + struct folio *folio = page_folio(page); + unsigned long i; + + if (folio_test_hugetlb(folio)) { + unsigned long nr = folio_nr_pages(folio); + + /* Hugetlb MTE flags are set for head page only */ + if (folio_try_hugetlb_mte_tagging(folio)) { + for (i = 0; i < nr; i++, page++) + mte_clear_page_tags(page_address(page)); + folio_set_hugetlb_mte_tagged(folio); + } + + /* ensure the tags are visible before the PTE is set */ + smp_wmb(); + + return; + } /* if PG_mte_tagged is set, tags have already been initialised */ for (i = 0; i < nr_pages; i++, page++) { @@ -410,6 +427,7 @@ static int __access_remote_tags(struct mm_struct *mm, unsigned long addr, void *maddr; struct page *page = get_user_page_vma_remote(mm, addr, gup_flags, &vma); + struct folio *folio; if (IS_ERR(page)) { err = PTR_ERR(page); @@ -428,7 +446,12 @@ static int __access_remote_tags(struct mm_struct *mm, unsigned long addr, put_page(page); break; } - WARN_ON_ONCE(!page_mte_tagged(page)); + + folio = page_folio(page); + if (folio_test_hugetlb(folio)) + WARN_ON_ONCE(!folio_test_hugetlb_mte_tagged(folio)); + else + WARN_ON_ONCE(!page_mte_tagged(page)); /* limit access to the end of the page */ offset = offset_in_page(addr); diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 962f985977c2..e738a353b20e 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -1055,6 +1055,7 @@ int kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm, void *maddr; unsigned long num_tags; struct page *page; + struct folio *folio; if (is_error_noslot_pfn(pfn)) { ret = -EFAULT; @@ -1068,10 +1069,13 @@ int kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm, ret = -EFAULT; goto out; } + folio = page_folio(page); maddr = page_address(page); if (!write) { - if (page_mte_tagged(page)) + if ((folio_test_hugetlb(folio) && + folio_test_hugetlb_mte_tagged(folio)) || + page_mte_tagged(page)) num_tags = mte_copy_tags_to_user(tags, maddr, MTE_GRANULES_PER_PAGE); else @@ -1085,14 +1089,20 @@ int kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm, * __set_ptes() in the VMM but still overriding the * tags, hence ignoring the return value. */ - try_page_mte_tagging(page); + if (folio_test_hugetlb(folio)) + folio_try_hugetlb_mte_tagging(folio); + else + try_page_mte_tagging(page); num_tags = mte_copy_tags_from_user(maddr, tags, MTE_GRANULES_PER_PAGE); /* uaccess failed, don't leave stale tags */ if (num_tags != MTE_GRANULES_PER_PAGE) mte_clear_page_tags(maddr); - set_page_mte_tagged(page); + if (folio_test_hugetlb(folio)) + folio_set_hugetlb_mte_tagged(folio); + else + set_page_mte_tagged(page); kvm_release_pfn_dirty(pfn); } diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index a509b63bd4dd..962449f9ac2f 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1401,10 +1401,21 @@ static void sanitise_mte_tags(struct kvm *kvm, kvm_pfn_t pfn, { unsigned long i, nr_pages = size >> PAGE_SHIFT; struct page *page = pfn_to_page(pfn); + struct folio *folio = page_folio(page); if (!kvm_has_mte(kvm)) return; + if (folio_test_hugetlb(folio)) { + /* Hugetlb has MTE flags set on head page only */ + if (folio_try_hugetlb_mte_tagging(folio)) { + for (i = 0; i < nr_pages; i++, page++) + mte_clear_page_tags(page_address(page)); + folio_set_hugetlb_mte_tagged(folio); + } + return; + } + for (i = 0; i < nr_pages; i++, page++) { if (try_page_mte_tagging(page)) { mte_clear_page_tags(page_address(page)); diff --git a/arch/arm64/mm/copypage.c b/arch/arm64/mm/copypage.c index a7bb20055ce0..87b3f1a25535 100644 --- a/arch/arm64/mm/copypage.c +++ b/arch/arm64/mm/copypage.c @@ -18,15 +18,40 @@ void copy_highpage(struct page *to, struct page *from) { void *kto = page_address(to); void *kfrom = page_address(from); + struct folio *src = page_folio(from); + struct folio *dst = page_folio(to); + unsigned int i, nr_pages; copy_page(kto, kfrom); if (kasan_hw_tags_enabled()) page_kasan_tag_reset(to); - if (system_supports_mte() && page_mte_tagged(from)) { + if (!system_supports_mte()) + return; + + if (folio_test_hugetlb(src) && + folio_test_hugetlb_mte_tagged(src)) { + if (!folio_try_hugetlb_mte_tagging(dst)) + return; + + /* + * Populate tags for all subpages. + * + * Don't assume the first page is head page since + * huge page copy may start from any subpage. + */ + nr_pages = folio_nr_pages(src); + for (i = 0; i < nr_pages; i++) { + kfrom = page_address(folio_page(src, i)); + kto = page_address(folio_page(dst, i)); + mte_copy_page_tags(kto, kfrom); + } + folio_set_hugetlb_mte_tagged(dst); + } else if (page_mte_tagged(from)) { /* It's a new page, shouldn't have been tagged yet */ WARN_ON_ONCE(!try_page_mte_tagging(to)); + mte_copy_page_tags(kto, kfrom); set_page_mte_tagged(to); } diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 5cf327337e22..f26b3b53d7de 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -110,7 +110,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) * way when do_mmap unwinds (may be important on powerpc * and ia64). */ - vm_flags_set(vma, VM_HUGETLB | VM_DONTEXPAND); + vm_flags_set(vma, VM_HUGETLB | VM_DONTEXPAND | VM_MTE_ALLOWED); vma->vm_ops = &hugetlb_vm_ops; ret = seal_check_write(info->seals, vma); -- 2.41.0

8 months, 2 weeks

2
2
0 0

[PATCH] kselftest/arm64: Validate that GCS push and write permissions work

by Mark Brown

Add trivial assembly programs which give themselves the appropriate permissions and then execute GCSPUSHM and GCSSTR, they will report errors by generating signals on the non-permitted instructions. Not using libc minimises the interaction with any policy set for the system but we skip on failure to get the permissions in case the system is locked down to make them inaccessible. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/gcs/.gitignore | 2 + tools/testing/selftests/arm64/gcs/Makefile | 8 ++- tools/testing/selftests/arm64/gcs/gcspushm.S | 96 +++++++++++++++++++++++++++ tools/testing/selftests/arm64/gcs/gcsstr.S | 99 ++++++++++++++++++++++++++++ 4 files changed, 204 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/arm64/gcs/.gitignore b/tools/testing/selftests/arm64/gcs/.gitignore index 1e8d1f6b27f2b4c6f8ea26fc55094469c39616d5..bbb8e40a7e524630fadc4cffe0defff128033829 100644 --- a/tools/testing/selftests/arm64/gcs/.gitignore +++ b/tools/testing/selftests/arm64/gcs/.gitignore @@ -3,3 +3,5 @@ libc-gcs gcs-locking gcs-stress gcs-stress-thread +gcspushm +gcsstr diff --git a/tools/testing/selftests/arm64/gcs/Makefile b/tools/testing/selftests/arm64/gcs/Makefile index d8b06ca51e22a99566f982f3aad3dceb30ffe05e..d2f3497a9103fc12ebc90c7f4e33ab9b846c6c8a 100644 --- a/tools/testing/selftests/arm64/gcs/Makefile +++ b/tools/testing/selftests/arm64/gcs/Makefile @@ -6,7 +6,7 @@ # nolibc. # -TEST_GEN_PROGS := basic-gcs libc-gcs gcs-locking gcs-stress +TEST_GEN_PROGS := basic-gcs libc-gcs gcs-locking gcs-stress gcspushm gcsstr TEST_GEN_PROGS_EXTENDED := gcs-stress-thread LDLIBS+=-lpthread @@ -22,3 +22,9 @@ $(OUTPUT)/basic-gcs: basic-gcs.c $(OUTPUT)/gcs-stress-thread: gcs-stress-thread.S $(CC) -nostdlib $^ -o $@ + +$(OUTPUT)/gcspushm: gcspushm.S + $(CC) -nostdlib $^ -o $@ + +$(OUTPUT)/gcsstr: gcsstr.S + $(CC) -nostdlib $^ -o $@ diff --git a/tools/testing/selftests/arm64/gcs/gcspushm.S b/tools/testing/selftests/arm64/gcs/gcspushm.S new file mode 100644 index 0000000000000000000000000000000000000000..bbe17c1325acc85d74dd3fe7cb586900226cde4c --- /dev/null +++ b/tools/testing/selftests/arm64/gcs/gcspushm.S @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright 2024 Arm Limited +// +// Give ourselves GCS push permissions then use them + +#include <asm/unistd.h> + +/* Shadow Stack/Guarded Control Stack interface */ +#define PR_GET_SHADOW_STACK_STATUS 74 +#define PR_SET_SHADOW_STACK_STATUS 75 +#define PR_LOCK_SHADOW_STACK_STATUS 76 + +# define PR_SHADOW_STACK_ENABLE (1UL << 0) +# define PR_SHADOW_STACK_WRITE (1UL << 1) +# define PR_SHADOW_STACK_PUSH (1UL << 2) + +#define KSFT_SKIP 4 + +.macro function name + .macro endfunction + .type \name, @function + .purgem endfunction + .endm +\name: +.endm + +// Print a single character x0 to stdout +// Clobbers x0-x2,x8 +function putc + str x0, [sp, #-16]! + + mov x0, #1 // STDOUT_FILENO + mov x1, sp + mov x2, #1 + mov x8, #__NR_write + svc #0 + + add sp, sp, #16 + ret +endfunction +.globl putc + +// Print a NUL-terminated string starting at address x0 to stdout +// Clobbers x0-x3,x8 +function puts + mov x1, x0 + + mov x2, #0 +0: ldrb w3, [x0], #1 + cbz w3, 1f + add x2, x2, #1 + b 0b + +1: mov w0, #1 // STDOUT_FILENO + mov x8, #__NR_write + svc #0 + + ret +endfunction +.globl puts + +// Utility macro to print a literal string +// Clobbers x0-x4,x8 +.macro puts string + .pushsection .rodata.str1.1, "aMS", @progbits, 1 +.L__puts_literal\@: .string "\string" + .popsection + + ldr x0, =.L__puts_literal\@ + bl puts +.endm + +.globl _start +function _start + // Run with GCS + mov x0, PR_SET_SHADOW_STACK_STATUS + mov x1, PR_SHADOW_STACK_ENABLE | PR_SHADOW_STACK_PUSH + mov x2, xzr + mov x3, xzr + mov x4, xzr + mov x5, xzr + mov x8, #__NR_prctl + svc #0 + cbz x0, 1f + puts "Failed to enable GCS with push permission\n" + mov x0, #KSFT_SKIP + b 2f +1: + sys #3, c7, c7, #0, x0 // GCSPUSHM + sysl x0, #3, c7, c7, #1 // GCSPOPM + + mov x0, #0 +2: + mov x8, #__NR_exit + svc #0 diff --git a/tools/testing/selftests/arm64/gcs/gcsstr.S b/tools/testing/selftests/arm64/gcs/gcsstr.S new file mode 100644 index 0000000000000000000000000000000000000000..a42bba6e30b18147887bb13046c96bd48850de2e --- /dev/null +++ b/tools/testing/selftests/arm64/gcs/gcsstr.S @@ -0,0 +1,99 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright 2024 Arm Limited +// +// Give ourselves GCS write permissions then use them + +#include <asm/unistd.h> + +/* Shadow Stack/Guarded Control Stack interface */ +#define PR_GET_SHADOW_STACK_STATUS 74 +#define PR_SET_SHADOW_STACK_STATUS 75 +#define PR_LOCK_SHADOW_STACK_STATUS 76 + +# define PR_SHADOW_STACK_ENABLE (1UL << 0) +# define PR_SHADOW_STACK_WRITE (1UL << 1) +# define PR_SHADOW_STACK_PUSH (1UL << 2) + +#define GCSPR_EL0 S3_3_C2_C5_1 + +#define KSFT_SKIP 4 + +.macro function name + .macro endfunction + .type \name, @function + .purgem endfunction + .endm +\name: +.endm + +// Print a single character x0 to stdout +// Clobbers x0-x2,x8 +function putc + str x0, [sp, #-16]! + + mov x0, #1 // STDOUT_FILENO + mov x1, sp + mov x2, #1 + mov x8, #__NR_write + svc #0 + + add sp, sp, #16 + ret +endfunction +.globl putc + +// Print a NUL-terminated string starting at address x0 to stdout +// Clobbers x0-x3,x8 +function puts + mov x1, x0 + + mov x2, #0 +0: ldrb w3, [x0], #1 + cbz w3, 1f + add x2, x2, #1 + b 0b + +1: mov w0, #1 // STDOUT_FILENO + mov x8, #__NR_write + svc #0 + + ret +endfunction +.globl puts + +// Utility macro to print a literal string +// Clobbers x0-x4,x8 +.macro puts string + .pushsection .rodata.str1.1, "aMS", @progbits, 1 +.L__puts_literal\@: .string "\string" + .popsection + + ldr x0, =.L__puts_literal\@ + bl puts +.endm + +.globl _start +function _start + // Run with GCS + mov x0, PR_SET_SHADOW_STACK_STATUS + mov x1, PR_SHADOW_STACK_ENABLE | PR_SHADOW_STACK_WRITE + mov x2, xzr + mov x3, xzr + mov x4, xzr + mov x5, xzr + mov x8, #__NR_prctl + svc #0 + cbz x0, 1f + puts "Failed to enable GCS with write permission\n" + mov x0, #KSFT_SKIP + b 2f +1: + mrs x0, GCSPR_EL0 + sub x0, x0, #8 + .inst 0xd91f1c01 // GCSSTR x1, x0 + + mov x0, #0 +2: + mov x8, #__NR_exit + svc #0 --- base-commit: bb9ae1a66c85eeb626864efd812c62026e126ec0 change-id: 20241004-arm64-gcs-test-flags-980a2ddfde6f Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months, 2 weeks

2
1
0 0

[PATCH] kselftest/arm64: Ensure stable names for GCS stress test results

by Mark Brown

The GCS stress test program currently uses the PID of the threads it creates in the test names it reports, resulting in unstable test names between runs. Fix this by using a thread number instead. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/gcs/gcs-stress.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/arm64/gcs/gcs-stress.c b/tools/testing/selftests/arm64/gcs/gcs-stress.c index bdec7ee8cfd5..03222c36c436 100644 --- a/tools/testing/selftests/arm64/gcs/gcs-stress.c +++ b/tools/testing/selftests/arm64/gcs/gcs-stress.c @@ -56,7 +56,7 @@ static int num_processors(void) return nproc; } -static void start_thread(struct child_data *child) +static void start_thread(struct child_data *child, int id) { int ret, pipefd[2], i; struct epoll_event ev; @@ -132,7 +132,7 @@ static void start_thread(struct child_data *child) ev.events = EPOLLIN | EPOLLHUP; ev.data.ptr = child; - ret = asprintf(&child->name, "Thread-%d", child->pid); + ret = asprintf(&child->name, "Thread-%d", id); if (ret == -1) ksft_exit_fail_msg("asprintf() failed\n"); @@ -437,7 +437,7 @@ int main(int argc, char **argv) tests); for (i = 0; i < gcs_threads; i++) - start_thread(&children[i]); + start_thread(&children[i], i); /* * All children started, close the startup pipe and let them --- base-commit: bb9ae1a66c85eeb626864efd812c62026e126ec0 change-id: 20241011-arm64-gcs-stress-stable-name-8550519fe152 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months, 2 weeks

2
1
0 0

[PATCH bpf v1 1/2] bpf: fix link info netfilter flags to populate defrag flag

by Tyrone Wu

This patch correctly populates the `bpf_link_info.netfilter.flags` field when user passes the `BPF_F_NETFILTER_IP_DEFRAG` flag. Fixes: 84601d6ee68a ("bpf: add bpf_link support for BPF_NETFILTER programs") Signed-off-by: Tyrone Wu <wudevelops(a)gmail.com> --- net/netfilter/nf_bpf_link.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/netfilter/nf_bpf_link.c b/net/netfilter/nf_bpf_link.c index 5257d5e7eb09..797fe8a9971e 100644 --- a/net/netfilter/nf_bpf_link.c +++ b/net/netfilter/nf_bpf_link.c @@ -150,11 +150,12 @@ static int bpf_nf_link_fill_link_info(const struct bpf_link *link, struct bpf_link_info *info) { struct bpf_nf_link *nf_link = container_of(link, struct bpf_nf_link, link); + const struct nf_defrag_hook *hook = nf_link->defrag_hook; info->netfilter.pf = nf_link->hook_ops.pf; info->netfilter.hooknum = nf_link->hook_ops.hooknum; info->netfilter.priority = nf_link->hook_ops.priority; - info->netfilter.flags = 0; + info->netfilter.flags = hook ? BPF_F_NETFILTER_IP_DEFRAG : 0; return 0; } -- 2.43.0

8 months, 2 weeks

4
4
0 0

[PATCH v3] selftests: tc-testing: Fix spelling errors in cgroup.json and flow.json

by Karan Sanghavi

This patch corrects typographical errors in the "name" fields of the JSON objects with IDs "4319" and "4341" in the tc-testing selftests. - "diffferent" is corrected to "different". - "muliple" is corrected to "multiple". Signed-off-by: Karan Sanghavi <karansanghvi98(a)gmail.com> --- v3: - Corrected the change logs to make it easy to understand. v2: - Combine two earlier patches into one - Links to v1 of each patch [1] https://lore.kernel.org/all/Zqp9asVA-q_OzDP-@Emma/ [2] https://lore.kernel.org/all/Zqp92oXa9joXk4T9@Emma/ tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json | 2 +- tools/testing/selftests/tc-testing/tc-tests/filters/flow.json | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json b/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json index 03723cf84..6897ff5ad 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json @@ -1189,7 +1189,7 @@ }, { "id": "4319", - "name": "Replace cgroup filter with diffferent match", + "name": "Replace cgroup filter with different match", "category": [ "filter", "cgroup" diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json index 58189327f..996448afe 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json @@ -507,7 +507,7 @@ }, { "id": "4341", - "name": "Add flow filter with muliple ops", + "name": "Add flow filter with multiple ops", "category": [ "filter", "flow" -- 2.43.0

8 months, 2 weeks

2
1
0 0

[PATCH bpf-next v3 0/2] Fix bpf_get/setsockopt failed when TCP over IPv4 via INET6 API

by Feng zhou

From: Feng Zhou <zhoufeng.zf(a)bytedance.com> When TCP over IPv4 via INET6 API, sk->sk_family is AF_INET6, but it is a v4 pkt. inet_csk(sk)->icsk_af_ops is ipv6_mapped and use ip_queue_xmit. Some sockopt did not take effect, such as tos. 0001: Use sk_is_inet helper to fix it. 0002: Setget_sockopt add a test for tcp over ipv4 via ipv6. Changelog: v2->v3: Addressed comments from Eric Dumazet - Use sk_is_inet() helper Details in here: https://lore.kernel.org/bpf/CANn89i+9GmBLCdgsfH=WWe-tyFYpiO27wONyxaxiU6aOBC… v1->v2: Addressed comments from kernel test robot - Fix compilation error Details in here: https://lore.kernel.org/bpf/202408152058.YXAnhLgZ-lkp@intel.com/T/ Feng Zhou (2): bpf: Fix bpf_get/setsockopt to tos not take effect when TCP over IPv4 via INET6 API selftests/bpf: Setget_sockopt add a test for tcp over ipv4 via ipv6 net/core/filter.c | 7 +++- .../selftests/bpf/prog_tests/setget_sockopt.c | 33 +++++++++++++++++++ .../selftests/bpf/progs/setget_sockopt.c | 13 ++++++-- 3 files changed, 49 insertions(+), 4 deletions(-) -- 2.30.2

8 months, 2 weeks

4
6
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[PATCH bpf-next v2 0/2] Cgroup skb add helper to get net_cls's classid

by Feng zhou

From: Feng Zhou <zhoufeng.zf(a)bytedance.com> 0001: Cgroup skb add bpf_skb_cgroup_classid_proto. 0002: Add a testcase for it. Feng Zhou (2): bpf: cg_skb add get classid helper bpf, selftests: Add test case for cgroup skb to get net_cls classid helpers Changelog: v1->v2: Addressed comments from Martin KaFai Lau - Just bpf_skb_cgroup_classid_proto. - Add a testcase. Details in here: https://lore.kernel.org/lkml/20240814095038.64523-1-zhoufeng.zf@bytedance.c… net/core/filter.c | 4 + .../bpf/prog_tests/cg_skb_get_classid.c | 87 +++++++++++++++++++ .../selftests/bpf/progs/cg_skb_get_classid.c | 19 ++++ 3 files changed, 110 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/cg_skb_get_classid.c create mode 100644 tools/testing/selftests/bpf/progs/cg_skb_get_classid.c -- 2.30.2

8 months, 2 weeks

3
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kselftest/next build: 7 builds: 2 failed, 5 passed, 1 warning (v6.12-rc3-5-gecfe6870abac)

by kernelci.org bot

kselftest/next build: 7 builds: 2 failed, 5 passed, 1 warning (v6.12-rc3-5-gecfe6870abac) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/v6.12-rc3-5-gecfe68… Tree: kselftest Branch: next Git Describe: v6.12-rc3-5-gecfe6870abac Git Commit: ecfe6870abac400036d802e28dde4822ec153ffd Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

8 months, 2 weeks

1
0
0 0

[PATCH v3 0/1] update mseal.rst

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)chromium.org> Pedro Falcato's optimization [1] for checking sealed VMAs, which replaces the can_modify_mm() function with an in-loop check, necessitates an update to the mseal.rst documentation to reflect this change. Furthermore, the document has received offline comments regarding the code sample and suggestions for sentence clarification to enhance reader comprehension. [1] https://lore.kernel.org/linux-mm/20240817-mseal-depessimize-v3-0-d8d2e037df… History: V3: update according to Randy Dunlap's comment V2: update according to Randy Dunlap's comments. https://lore.kernel.org/all/20241001002628.2239032-1-jeffxu@chromium.org/ V1: initial version https://lore.kernel.org/all/20240927185211.729207-1-jeffxu@chromium.org/ Jeff Xu (1): mseal: update mseal.rst Documentation/userspace-api/mseal.rst | 307 +++++++++++++------------- 1 file changed, 148 insertions(+), 159 deletions(-) -- 2.47.0.rc0.187.ge670bccf7e-goog

8 months, 2 weeks

4
6
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[PATCH 0/7] KVM: x86: Introduce new ioctl KVM_HYPERV_SET_TLB_FLUSH_INHIBIT

by Nikolas Wipper

This series introduces a new ioctl KVM_HYPERV_SET_TLB_FLUSH_INHIBIT. It allows hypervisors to inhibit remote TLB flushing of a vCPU coming from Hyper-V hyper-calls (namely HvFlushVirtualAddressSpace(Ex) and HvFlushirtualAddressList(Ex)). It is required to implement the HvTranslateVirtualAddress hyper-call as part of the ongoing effort to emulate VSM within KVM and QEMU. The hyper-call requires several new KVM APIs, one of which is KVM_HYPERV_SET_TLB_FLUSH_INHIBIT. Once the inhibit flag is set, any processor attempting to flush the TLB on the marked vCPU, with a HyperV hyper-call, will be suspended until the flag is cleared again. During the suspension the vCPU will not run at all, neither receiving events nor running other code. It will wake up from suspension once the vCPU it is waiting on clears the inhibit flag. This behaviour is specified in Microsoft's "Hypervisor Top Level Functional Specification" (TLFS). The vCPU will block execution during the suspension, making it transparent to the hypervisor. An alternative design to what is proposed here would be to exit from the Hyper-V hypercall upon finding an inhibited vCPU. We decided against it, to allow for a simpler and more performant implementation. Exiting to user space would create an additional synchronisation burden and make the resulting code more complex. Additionally, since the suspension is specific to HyperV events, it wouldn't provide any functional benefits. The TLFS specifies that the instruction pointer is not moved during the suspension, so upon unsuspending the hyper-calls is re-executed. This means that, if the vCPU encounters another inhibited TLB and is resuspended, any pending events and interrupts are still executed. This is identical to the vCPU receiving such events right before the hyper-call. This inhibiting of TLB flushes is necessary, to securely implement intercepts. These allow a higher "Virtual Trust Level" (VTL) to react to a lower VTL accessing restricted memory. In such an intercept the VTL may want to emulate a memory access in software, however, if another processor flushes the TLB during that operation, incorrect behaviour can result. The patch series includes basic testing of the ioctl and suspension state. All previously passing KVM selftests and KVM unit tests still pass. Series overview: - 1: Document the new ioctl - 2: Implement the suspension state - 3: Update TLB flush hyper-call in preparation - 4-5: Implement the ioctl - 6: Add traces - 7: Implement testing As the suspension state is transparent to the hypervisor, testing is complicated. The current version makes use of a set time intervall to give the vCPU time to enter the hyper-call and get suspended. Ideas for improvement on this are very welcome. This series, alongside my series [1] implementing KVM_TRANSLATE2, the series by Nicolas Saenz Julienne [2] implementing the core building blocks for VSM and the accompanying QEMU implementation [3], is capable of booting Windows Server 2019 with VSM/CredentialGuard enabled. All three series are also available on GitHub [4]. [1] https://lore.kernel.org/linux-kernel/20240910152207.38974-1-nikwip@amazon.d… [2] https://lore.kernel.org/linux-hyperv/20240609154945.55332-1-nsaenz@amazon.c… [3] https://github.com/vianpl/qemu/tree/vsm/next [4] https://github.com/vianpl/linux/tree/vsm/next Best, Nikolas Nikolas Wipper (7): KVM: Add API documentation for KVM_HYPERV_SET_TLB_FLUSH_INHIBIT KVM: x86: Implement Hyper-V's vCPU suspended state KVM: x86: Check vCPUs before enqueuing TLB flushes in kvm_hv_flush_tlb() KVM: Introduce KVM_HYPERV_SET_TLB_FLUSH_INHIBIT KVM: x86: Implement KVM_HYPERV_SET_TLB_FLUSH_INHIBIT KVM: x86: Add trace events to track Hyper-V suspensions KVM: selftests: Add tests for KVM_HYPERV_SET_TLB_FLUSH_INHIBIT Documentation/virt/kvm/api.rst | 41 +++ arch/x86/include/asm/kvm_host.h | 5 + arch/x86/kvm/hyperv.c | 86 +++++- arch/x86/kvm/hyperv.h | 17 ++ arch/x86/kvm/trace.h | 39 +++ arch/x86/kvm/x86.c | 41 ++- include/uapi/linux/kvm.h | 15 + tools/testing/selftests/kvm/Makefile | 1 + .../kvm/x86_64/hyperv_tlb_flush_inhibit.c | 274 ++++++++++++++++++ 9 files changed, 503 insertions(+), 16 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush_inhibit.c -- 2.40.1 Amazon Web Services Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss Eingetragen am Amtsgericht Charlottenburg unter HRB 257764 B Sitz: Berlin Ust-ID: DE 365 538 597

8 months, 2 weeks

5
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[PATCH net v2 0/2] mptcp: prevent MPC handshake on port-based signal endpoints

by Matthieu Baerts (NGI0)

MPTCP connection requests toward a listening socket created by the in-kernel PM for a port based signal endpoint will never be accepted, they need to be explicitly rejected. - Patch 1: Explicitly reject such requests. A fix for >= v5.12. - Patch 2: Cover this case in the MPTCP selftests to avoid regressions. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Changes in v2: - This new version fixes the root cause for the issue Cong Wang sent a patch for a few weeks ago, see the v1, and the explanations below. The new version is very different from the v1, from a different author. Thanks to Cong Wang for the first analysis, and to Paolo for having spot the root cause, and sent a fix for it. - Link to v1: https://lore.kernel.org/r/20240908180620.822579-1-xiyou.wangcong@gmail.com - Link: https://lore.kernel.org/r/a5289a0d-2557-40b8-9575-6f1a0bbf06e4@redhat.com --- Paolo Abeni (2): mptcp: prevent MPC handshake on port-based signal endpoints selftests: mptcp: join: test for prohibited MPC to port-based endp net/mptcp/mib.c | 1 + net/mptcp/mib.h | 1 + net/mptcp/pm_netlink.c | 1 + net/mptcp/protocol.h | 1 + net/mptcp/subflow.c | 11 +++ tools/testing/selftests/net/mptcp/mptcp_join.sh | 117 +++++++++++++++++------- 6 files changed, 101 insertions(+), 31 deletions(-) --- base-commit: 174714f0e505070a16be6fbede30d32b81df789f change-id: 20241014-net-mptcp-mpc-port-endp-4f88bd428ec7 Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

8 months, 2 weeks

2
3
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[RFC PATCH 0/7] mm/damon: remove DAMON debugfs interface

by SeongJae Park

DAMON debugfs interface was the only user interface of DAMON at the beginning[1]. However, it turned out the interface would be not good enough for long-term flexibility and stability. In Feb 2022[2], we therefore introduced DAMON sysfs interface as an alternative user interface that aims long-term flexibility and stability. With its introduction, DAMON debugfs interface has announced to be deprecated in near future. In Feb 2023[3], we announced the official deprecation of DAMON debugfs interface. In Jan 2024[4], we further made the deprecation difficult to be ignored. And as of this writing (2024-10-14), no problem or concerns about the deprecation have reported. Apparently users are already moved to the alternative, or made good plans for the change. Remove the DAMON debugfs interface code from the tree. Given the past timeline and the absence of reported problems or concerns, it is safe enough to be done. That said, we will not drop the RFC tag of this patch series at least until the end of this year, to use this as the real last call for users. [1] https://lore.kernel.org/20210716081449.22187-1-sj38.park@gmail.com [2] https://lore.kernel.org/20220228081314.5770-1-sj@kernel.org [3] https://lore.kernel.org/20230209192009.7885-1-sj@kernel.org [4] https://lore.kernel.org/20240130013549.89538-1-sj@kernel.org SeongJae Park (7): Docs/admin-guide/mm/damon/usage: remove DAMON debugfs interface documentation Docs/mm/damon/design: update for removal of DAMON debugfs interface selftests/damon/config: remove configs for DAMON debugfs interface selftests selftests/damon: remove tests for DAMON debugfs interface kunit: configs: remove configs for DAMON debugfs interface tests mm/damon: remove DAMON debugfs interface kunit tests mm/damon: remove DAMON debugfs interface Documentation/admin-guide/mm/damon/usage.rst | 309 ----- Documentation/mm/damon/design.rst | 23 +- mm/damon/Kconfig | 30 - mm/damon/Makefile | 1 - mm/damon/dbgfs.c | 1148 ----------------- mm/damon/tests/.kunitconfig | 7 - mm/damon/tests/dbgfs-kunit.h | 173 --- tools/testing/kunit/configs/all_tests.config | 3 - tools/testing/selftests/damon/.gitignore | 3 - tools/testing/selftests/damon/Makefile | 11 +- tools/testing/selftests/damon/config | 1 - .../testing/selftests/damon/debugfs_attrs.sh | 17 - .../debugfs_duplicate_context_creation.sh | 27 - .../selftests/damon/debugfs_empty_targets.sh | 21 - .../damon/debugfs_huge_count_read_write.sh | 22 - .../damon/debugfs_rm_non_contexts.sh | 19 - .../selftests/damon/debugfs_schemes.sh | 19 - .../selftests/damon/debugfs_target_ids.sh | 19 - .../damon/debugfs_target_ids_pid_leak.c | 68 - .../damon/debugfs_target_ids_pid_leak.sh | 22 - ...fs_target_ids_read_before_terminate_race.c | 80 -- ...s_target_ids_read_before_terminate_race.sh | 14 - .../selftests/damon/huge_count_read_write.c | 48 - 23 files changed, 11 insertions(+), 2074 deletions(-) delete mode 100644 mm/damon/dbgfs.c delete mode 100644 mm/damon/tests/dbgfs-kunit.h delete mode 100755 tools/testing/selftests/damon/debugfs_attrs.sh delete mode 100755 tools/testing/selftests/damon/debugfs_duplicate_context_creation.sh delete mode 100755 tools/testing/selftests/damon/debugfs_empty_targets.sh delete mode 100755 tools/testing/selftests/damon/debugfs_huge_count_read_write.sh delete mode 100755 tools/testing/selftests/damon/debugfs_rm_non_contexts.sh delete mode 100755 tools/testing/selftests/damon/debugfs_schemes.sh delete mode 100755 tools/testing/selftests/damon/debugfs_target_ids.sh delete mode 100644 tools/testing/selftests/damon/debugfs_target_ids_pid_leak.c delete mode 100755 tools/testing/selftests/damon/debugfs_target_ids_pid_leak.sh delete mode 100644 tools/testing/selftests/damon/debugfs_target_ids_read_before_terminate_race.c delete mode 100755 tools/testing/selftests/damon/debugfs_target_ids_read_before_terminate_race.sh delete mode 100644 tools/testing/selftests/damon/huge_count_read_write.c base-commit: 5ef943709a1b88304aa6e8cb8683a25bf81874f0 -- 2.39.5

8 months, 2 weeks

1
4
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[PATCH net-next v04 0/3] net: af_packet: allow joining a fanout when link is down

by Gur Stavi

PACKET socket can retain its fanout membership through link down and up and leave a fanout while closed regardless of link state. However, socket was forbidden from joining a fanout while it was not RUNNING. This scenario was identified while studying DPDK pmd_af_packet_drv. Since sockets are only created during initialization, there is no reason to fail the initialization if a single link is temporarily down. This patch allows PACKET socket to join a fanout while not RUNNING. Selftest psock_fanout is extended to test this "fanout while link down" scenario. Selftest psock_fanout is also extended to test fanout create/join by socket that did not bind or specified a protocol, which carries an implicit bind. This is the only test that was performed. Changes: V04: * Minimized code change. * Removed test of ifindex. A socket that went through bind "unlisted" race can join a fanout. V03: https://lore.kernel.org/netdev/cover.1728555449.git.gur.stavi@huawei.com * psock_fanout: add test for joining fanout with unbound socket. * Test that socket can receive packets before adding it to a fanout match. This is kind of replaces the RUNNING test that was removed. * Initialize po->ifindex in packet_create. To -1 if no protocol is specified and add an explicit initialization to 0 if protocol is specified. * Refactor relevant code in fanout_add within bind_lock, as a sequence of if {} else if {}, in order to reduce indentation of nested if statements and provide specific error codes. V02: https://lore.kernel.org/netdev/cover.1728382839.git.gur.stavi@huawei.com * psock_fanout: use explicit loopback up/down instead of toggle. * psock_fanout: don't try to restore loopback state on failure. * Rephrase commit message about "leaving a fanout". V01: https://lore.kernel.org/netdev/cover.1728303615.git.gur.stavi@huawei.com/ Gur Stavi (3): af_packet: allow fanout_add when socket is not RUNNING selftests: net/psock_fanout: socket joins fanout when link is down selftests: net/psock_fanout: unbound socket fanout net/packet/af_packet.c | 9 +-- tools/testing/selftests/net/psock_fanout.c | 78 +++++++++++++++++++++- 2 files changed, 80 insertions(+), 7 deletions(-) base-commit: c531f2269a53db5cf64b24baf785ccbcda52970f -- 2.45.2

8 months, 2 weeks

3
7
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[PATCH net-next v1 0/3] Threads support in proc connector

by Anjali Kulkarni

Recently we committed a fix to allow processes to receive notifications for non-zero exits via the process connector module. Commit is a4c9a56e6a2c. However, for threads, when it does a pthread_exit(&exit_status) call, the kernel is not aware of the exit status with which pthread_exit is called. It is sent by child thread to the parent process, if it is waiting in pthread_join(). Hence, for a thread exiting abnormally, kernel cannot send notifications to any listening processes. The exception to this is if the thread is sent a signal which it has not handled, and dies along with it's process as a result; for eg. SIGSEGV or SIGKILL. In this case, kernel is aware of the non-zero exit and sends a notification for it. For our use case, we cannot have parent wait in pthread_join, one of the main reasons for this being that we do not want to track normal pthread_exit(), which could be a very large number. We only want to be notified of any abnormal exits. Hence, threads are created with pthread_attr_t set to PTHREAD_CREATE_DETACHED. To fix this problem, we add a new type PROC_CN_MCAST_NOTIFY to proc connector API, which allows a thread to send it's exit status to kernel either when it needs to call pthread_exit() with non-zero value to indicate some error or from signal handler before pthread_exit(). v->v1 changes: - Handled comment by Simon Horman to remove unused err in cn_proc.c - Handled comment by Simon Horman to make adata and key_display static in cn_hash_test.c Anjali Kulkarni (3): connector/cn_proc: Add hash table for threads connector/cn_proc: Kunit tests for threads hash table connector/cn_proc: Selftest for threads drivers/connector/Makefile | 2 +- drivers/connector/cn_hash.c | 240 ++++++++++++++++++ drivers/connector/cn_proc.c | 58 ++++- drivers/connector/connector.c | 96 ++++++- include/linux/connector.h | 47 ++++ include/linux/sched.h | 2 +- include/uapi/linux/cn_proc.h | 4 +- lib/Kconfig.debug | 17 ++ lib/Makefile | 1 + lib/cn_hash_test.c | 167 ++++++++++++ lib/cn_hash_test.h | 12 + tools/testing/selftests/connector/Makefile | 23 +- .../testing/selftests/connector/proc_filter.c | 5 + tools/testing/selftests/connector/thread.c | 90 +++++++ .../selftests/connector/thread_filter.c | 93 +++++++ 15 files changed, 847 insertions(+), 10 deletions(-) create mode 100644 drivers/connector/cn_hash.c create mode 100644 lib/cn_hash_test.c create mode 100644 lib/cn_hash_test.h create mode 100644 tools/testing/selftests/connector/thread.c create mode 100644 tools/testing/selftests/connector/thread_filter.c -- 2.46.0

8 months, 2 weeks

3
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[PATCH v2 0/6] Make set_dev_pasid op supporting domain replacement

by Yi Liu

This splits the preparation works of the iommu and the Intel iommu driver out from the iommufd pasid attach/replace series. [1] To support domain replacement, the definition of the set_dev_pasid op needs to be enhanced. Meanwhile, the existing set_dev_pasid callbacks should be extended as well to suit the new definition. This series first prepares the Intel iommu set_dev_pasid op for the new definition, adds the missing set_dev_pasid support for nested domain, makes ARM SMMUv3 set_dev_pasid op to suit the new definition, and in the end enhances the definition of set_dev_pasid op. The AMD set_dev_pasid callback is extended to fail if the caller tries to do domain replacement to meet the new definition of set_dev_pasid op. AMD iommu driver would support it later per Vasant [2]. [1] https://lore.kernel.org/linux-iommu/20240412081516.31168-1-yi.l.liu@intel.c… [2] https://lore.kernel.org/linux-iommu/fa9c4fc3-9365-465e-8926-b4d2d6361b9c@am… v2: - Make ARM SMMUv3 set_dev_pasid op support domain replacement (Jason) - Drop patch 03 of v1 (Kevin) - Multiple tweaks in VT-d driver (Kevin) v1: https://lore.kernel.org/linux-iommu/20240628085538.47049-1-yi.l.liu@intel.c… Regards, Yi Liu Jason Gunthorpe (1): iommu/arm-smmu-v3: Make smmuv3 set_dev_pasid() op support replace Lu Baolu (1): iommu/vt-d: Add set_dev_pasid callback for nested domain Yi Liu (4): iommu: Pass old domain to set_dev_pasid op iommu/vt-d: Move intel_drain_pasid_prq() into intel_pasid_tear_down_entry() iommu/vt-d: Make intel_iommu_set_dev_pasid() to handle domain replacement iommu: Make set_dev_pasid op support domain replacement drivers/iommu/amd/amd_iommu.h | 3 +- drivers/iommu/amd/pasid.c | 6 +- .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 5 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 8 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 2 +- drivers/iommu/intel/iommu.c | 122 ++++++++++++------ drivers/iommu/intel/iommu.h | 3 + drivers/iommu/intel/nested.c | 1 + drivers/iommu/intel/pasid.c | 13 +- drivers/iommu/intel/pasid.h | 8 +- drivers/iommu/intel/svm.c | 6 +- drivers/iommu/iommu.c | 3 +- include/linux/iommu.h | 5 +- 13 files changed, 129 insertions(+), 56 deletions(-) -- 2.34.1

8 months, 2 weeks

7
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[PATCH] selftests: clone3: Use the capget and capset syscall directly

by zhouyuhang

From: zhouyuhang <zhouyuhang(a)kylinos.cn> The libcap commit aca076443591 ("Make cap_t operations thread safe.") added a __u8 mutex at the beginning of the struct _cap_struct,it changes the offset of the members in the structure that breaks the assumption made in the "struct libcap" definition in clone3_cap_checkpoint_restore.c.So use the capget and capset syscall directly and remove the libcap library dependency like the commit 663af70aabb7 ("bpf: selftests: Add helpers to directly use the capget and capset syscall") does. Signed-off-by: zhouyuhang <zhouyuhang(a)kylinos.cn> --- tools/testing/selftests/clone3/Makefile | 1 - .../clone3/clone3_cap_checkpoint_restore.c | 60 +++++++++---------- 2 files changed, 28 insertions(+), 33 deletions(-) diff --git a/tools/testing/selftests/clone3/Makefile b/tools/testing/selftests/clone3/Makefile index 84832c369a2e..59d26e8da8d2 100644 --- a/tools/testing/selftests/clone3/Makefile +++ b/tools/testing/selftests/clone3/Makefile @@ -1,6 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 CFLAGS += -g -std=gnu99 $(KHDR_INCLUDES) -LDLIBS += -lcap TEST_GEN_PROGS := clone3 clone3_clear_sighand clone3_set_tid \ clone3_cap_checkpoint_restore diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c index 3c196fa86c99..111912e2aead 100644 --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c @@ -15,7 +15,7 @@ #include <stdio.h> #include <stdlib.h> #include <stdbool.h> -#include <sys/capability.h> +#include <linux/capability.h> #include <sys/prctl.h> #include <sys/syscall.h> #include <sys/types.h> @@ -27,6 +27,13 @@ #include "../kselftest_harness.h" #include "clone3_selftests.h" +#ifndef CAP_CHECKPOINT_RESTORE +#define CAP_CHECKPOINT_RESTORE 40 +#endif + +int capget(cap_user_header_t header, cap_user_data_t data); +int capset(cap_user_header_t header, const cap_user_data_t data); + static void child_exit(int ret) { fflush(stdout); @@ -87,47 +94,36 @@ static int test_clone3_set_tid(struct __test_metadata *_metadata, return ret; } -struct libcap { - struct __user_cap_header_struct hdr; - struct __user_cap_data_struct data[2]; -}; - static int set_capability(void) { - cap_value_t cap_values[] = { CAP_SETUID, CAP_SETGID }; - struct libcap *cap; - int ret = -1; - cap_t caps; - - caps = cap_get_proc(); - if (!caps) { - perror("cap_get_proc"); + struct __user_cap_data_struct data[2]; + struct __user_cap_header_struct hdr = { + .version = _LINUX_CAPABILITY_VERSION_3, + }; + __u32 cap0 = 1 << CAP_SETUID | 1 << CAP_SETGID; + __u32 cap1 = 1 << (CAP_CHECKPOINT_RESTORE - 32); + int ret; + + ret = capget(&hdr, data); + if (ret) { + perror("capget"); return -1; } /* Drop all capabilities */ - if (cap_clear(caps)) { - perror("cap_clear"); - goto out; - } + memset(&data, 0, sizeof(data)); - cap_set_flag(caps, CAP_EFFECTIVE, 2, cap_values, CAP_SET); - cap_set_flag(caps, CAP_PERMITTED, 2, cap_values, CAP_SET); + data[0].effective |= cap0; + data[0].permitted |= cap0; - cap = (struct libcap *) caps; + data[1].effective |= cap1; + data[1].permitted |= cap1; - /* 40 -> CAP_CHECKPOINT_RESTORE */ - cap->data[1].effective |= 1 << (40 - 32); - cap->data[1].permitted |= 1 << (40 - 32); - - if (cap_set_proc(caps)) { - perror("cap_set_proc"); - goto out; + ret = capset(&hdr, data); + if (ret) { + perror("capset"); + return -1; } - ret = 0; -out: - if (cap_free(caps)) - perror("cap_free"); return ret; } -- 2.25.1

8 months, 2 weeks

2
7
0 0

[PATCH v13 00/40] arm64/gcs: Provide support for GCS in userspace

by Mark Brown

The arm64 Guarded Control Stack (GCS) feature provides support for hardware protected stacks of return addresses, intended to provide hardening against return oriented programming (ROP) attacks and to make it easier to gather call stacks for applications such as profiling. When GCS is active a secondary stack called the Guarded Control Stack is maintained, protected with a memory attribute which means that it can only be written with specific GCS operations. The current GCS pointer can not be directly written to by userspace. When a BL is executed the value stored in LR is also pushed onto the GCS, and when a RET is executed the top of the GCS is popped and compared to LR with a fault being raised if the values do not match. GCS operations may only be performed on GCS pages, a data abort is generated if they are not. The combination of hardware enforcement and lack of extra instructions in the function entry and exit paths should result in something which has less overhead and is more difficult to attack than a purely software implementation like clang's shadow stacks. This series implements support for use of GCS by userspace, along with support for use of GCS within KVM guests. It does not enable use of GCS by either EL1 or EL2, this will be implemented separately. Executables are started without GCS and must use a prctl() to enable it, it is expected that this will be done very early in application execution by the dynamic linker or other startup code. For dynamic linking this will be done by checking that everything in the executable is marked as GCS compatible. x86 has an equivalent feature called shadow stacks, this series depends on the x86 patches for generic memory management support for the new guarded/shadow stack page type and shares APIs as much as possible. As there has been extensive discussion with the wider community around the ABI for shadow stacks I have as far as practical kept implementation decisions close to those for x86, anticipating that review would lead to similar conclusions in the absence of strong reasoning for divergence. The main divergence I am concious of is that x86 allows shadow stack to be enabled and disabled repeatedly, freeing the shadow stack for the thread whenever disabled, while this implementation keeps the GCS allocated after disable but refuses to reenable it. This is to avoid races with things actively walking the GCS during a disable, we do anticipate that some systems will wish to disable GCS at runtime but are not aware of any demand for subsequently reenabling it. x86 uses an arch_prctl() to manage enable and disable, since only x86 and S/390 use arch_prctl() a generic prctl() was proposed[1] as part of a patch set for the equivalent RISC-V Zicfiss feature which I initially adopted fairly directly but following review feedback has been revised quite a bit. We currently maintain the x86 pattern of implicitly allocating a shadow stack for threads started with shadow stack enabled, there has been some discussion of removing this support and requiring the use of clone3() with explicit allocation of shadow stacks instead. I have no strong feelings either way, implicit allocation is not really consistent with anything else we do and creates the potential for errors around thread exit but on the other hand it is existing ABI on x86 and minimises the changes needed in userspace code. glibc and bionic changes using this ABI have been implemented and tested. Headless Android systems have been validated and Ross Burton has used this code has been used to bring up a Yocto system with GCS enabed as standard, a test implementation of V8 support has also been done. uprobes are not currently supported, missing emulation was identified late in review. There is an open issue with support for CRIU, on x86 this required the ability to set the GCS mode via ptrace. This series supports configuring mode bits other than enable/disable via ptrace but it needs to be confirmed if this is sufficient. It is likely that we could relax some of the barriers added here with some more targeted placements, this is left for further study. There is an in process series adding clone3() support for shadow stacks: https://lore.kernel.org/r/20240819-clone3-shadow-stack-v9-0-962d74f99464@ke… Previous versions of this series depended on that, this dependency has been removed in order to make merging easier. [1] https://lore.kernel.org/lkml/20240403234054.2020347-1-debug@rivosinc.com/ Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v13: - Rebase onto v6.12-rc1. - Allocate VM_HIGH_ARCH_6 since protection keys used all the existing bits. - Implement mm_release() and free transparently allocated GCSs there. - Use bit 32 of AT_HWCAP for GCS due to AT_HWCAP2 being filled. - Since we now only set GCSCRE0_EL1 on change ensure that it is initialised with GCSPR_EL0 accessible to EL0. - Fix OOM handling on thread copy. - Link to v12: https://lore.kernel.org/r/20240829-arm64-gcs-v12-0-42fec947436a@kernel.org Changes in v12: - Clarify and simplify the signal handling code so we work with the register state. - When checking for write aborts to shadow stack pages ensure the fault is a data abort. - Depend on !UPROBES. - Comment cleanups. - Link to v11: https://lore.kernel.org/r/20240822-arm64-gcs-v11-0-41b81947ecb5@kernel.org Changes in v11: - Remove the dependency on the addition of clone3() support for shadow stacks, rebasing onto v6.11-rc3. - Make ID_AA64PFR1_EL1.GCS writeable in KVM. - Hide GCS registers when GCS is not enabled for KVM guests. - Require HCRX_EL2.GCSEn if booting at EL1. - Require that GCSCR_EL1 and GCSCRE0_EL1 be initialised regardless of if we boot at EL2 or EL1. - Remove some stray use of bit 63 in signal cap tokens. - Warn if we see a GCS with VM_SHARED. - Remove rdundant check for VM_WRITE in fault handling. - Cleanups and clarifications in the ABI document. - Clean up and improve documentation of some sync placement. - Only set the EL0 GCS mode if it's actually changed. - Various minor fixes and tweaks. - Link to v10: https://lore.kernel.org/r/20240801-arm64-gcs-v10-0-699e2bd2190b@kernel.org Changes in v10: - Fix issues with THP. - Tighten up requirements for initialising GCSCR*. - Only generate GCS signal frames for threads using GCS. - Only context switch EL1 GCS registers if S1PIE is enabled. - Move context switch of GCSCRE0_EL1 to EL0 context switch. - Make GCS registers unconditionally visible to userspace. - Use FHU infrastructure. - Don't change writability of ID_AA64PFR1_EL1 for KVM. - Remove unused arguments from alloc_gcs(). - Typo fixes. - Link to v9: https://lore.kernel.org/r/20240625-arm64-gcs-v9-0-0f634469b8f0@kernel.org Changes in v9: - Rebase onto v6.10-rc3. - Restructure and clarify memory management fault handling. - Fix up basic-gcs for the latest clone3() changes. - Convert to newly merged KVM ID register based feature configuration. - Fixes for NV traps. - Link to v8: https://lore.kernel.org/r/20240203-arm64-gcs-v8-0-c9fec77673ef@kernel.org Changes in v8: - Invalidate signal cap token on stack when consuming. - Typo and other trivial fixes. - Don't try to use process_vm_write() on GCS, it intentionally does not work. - Fix leak of thread GCSs. - Rebase onto latest clone3() series. - Link to v7: https://lore.kernel.org/r/20231122-arm64-gcs-v7-0-201c483bd775@kernel.org Changes in v7: - Rebase onto v6.7-rc2 via the clone3() patch series. - Change the token used to cap the stack during signal handling to be compatible with GCSPOPM. - Fix flags for new page types. - Fold in support for clone3(). - Replace copy_to_user_gcs() with put_user_gcs(). - Link to v6: https://lore.kernel.org/r/20231009-arm64-gcs-v6-0-78e55deaa4dd@kernel.org Changes in v6: - Rebase onto v6.6-rc3. - Add some more gcsb_dsync() barriers following spec clarifications. - Due to ongoing discussion around clone()/clone3() I've not updated anything there, the behaviour is the same as on previous versions. - Link to v5: https://lore.kernel.org/r/20230822-arm64-gcs-v5-0-9ef181dd6324@kernel.org Changes in v5: - Don't map any permissions for user GCSs, we always use EL0 accessors or use a separate mapping of the page. - Reduce the standard size of the GCS to RLIMIT_STACK/2. - Enforce a PAGE_SIZE alignment requirement on map_shadow_stack(). - Clarifications and fixes to documentation. - More tests. - Link to v4: https://lore.kernel.org/r/20230807-arm64-gcs-v4-0-68cfa37f9069@kernel.org Changes in v4: - Implement flags for map_shadow_stack() allowing the cap and end of stack marker to be enabled independently or not at all. - Relax size and alignment requirements for map_shadow_stack(). - Add more blurb explaining the advantages of hardware enforcement. - Link to v3: https://lore.kernel.org/r/20230731-arm64-gcs-v3-0-cddf9f980d98@kernel.org Changes in v3: - Rebase onto v6.5-rc4. - Add a GCS barrier on context switch. - Add a GCS stress test. - Link to v2: https://lore.kernel.org/r/20230724-arm64-gcs-v2-0-dc2c1d44c2eb@kernel.org Changes in v2: - Rebase onto v6.5-rc3. - Rework prctl() interface to allow each bit to be locked independently. - map_shadow_stack() now places the cap token based on the size requested by the caller not the actual space allocated. - Mode changes other than enable via ptrace are now supported. - Expand test coverage. - Various smaller fixes and adjustments. - Link to v1: https://lore.kernel.org/r/20230716-arm64-gcs-v1-0-bf567f93bba6@kernel.org --- Mark Brown (40): mm: Introduce ARCH_HAS_USER_SHADOW_STACK mm: Define VM_HIGH_ARCH_6 arm64/mm: Restructure arch_validate_flags() for extensibility prctl: arch-agnostic prctl for shadow stack mman: Add map_shadow_stack() flags arm64: Document boot requirements for Guarded Control Stacks arm64/gcs: Document the ABI for Guarded Control Stacks arm64/sysreg: Add definitions for architected GCS caps arm64/gcs: Add manual encodings of GCS instructions arm64/gcs: Provide put_user_gcs() arm64/gcs: Provide basic EL2 setup to allow GCS usage at EL0 and EL1 arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) arm64/mm: Allocate PIE slots for EL0 guarded control stack mm: Define VM_SHADOW_STACK for arm64 when we support GCS arm64/mm: Map pages for guarded control stack KVM: arm64: Manage GCS access and registers for guests arm64/idreg: Add overrride for GCS arm64/hwcap: Add hwcap for GCS arm64/traps: Handle GCS exceptions arm64/mm: Handle GCS data aborts arm64/gcs: Context switch GCS state for EL0 arm64/gcs: Ensure that new threads have a GCS arm64/gcs: Implement shadow stack prctl() interface arm64/mm: Implement map_shadow_stack() arm64/signal: Set up and restore the GCS context for signal handlers arm64/signal: Expose GCS state in signal frames arm64/ptrace: Expose GCS via ptrace and core files arm64: Add Kconfig for Guarded Control Stack (GCS) kselftest/arm64: Verify the GCS hwcap kselftest/arm64: Add GCS as a detected feature in the signal tests kselftest/arm64: Add framework support for GCS to signal handling tests kselftest/arm64: Allow signals tests to specify an expected si_code kselftest/arm64: Always run signals tests with GCS enabled kselftest/arm64: Add very basic GCS test program kselftest/arm64: Add a GCS test program built with the system libc kselftest/arm64: Add test coverage for GCS mode locking kselftest/arm64: Add GCS signal tests kselftest/arm64: Add a GCS stress test kselftest/arm64: Enable GCS for the FP stress tests KVM: selftests: arm64: Add GCS registers to get-reg-list Documentation/admin-guide/kernel-parameters.txt | 3 + Documentation/arch/arm64/booting.rst | 32 + Documentation/arch/arm64/elf_hwcaps.rst | 4 + Documentation/arch/arm64/gcs.rst | 230 +++++++ Documentation/arch/arm64/index.rst | 1 + Documentation/filesystems/proc.rst | 2 +- arch/arm64/Kconfig | 21 + arch/arm64/include/asm/cpufeature.h | 6 + arch/arm64/include/asm/el2_setup.h | 30 + arch/arm64/include/asm/esr.h | 28 +- arch/arm64/include/asm/exception.h | 2 + arch/arm64/include/asm/gcs.h | 107 +++ arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/asm/kvm_host.h | 12 + arch/arm64/include/asm/mman.h | 23 +- arch/arm64/include/asm/mmu_context.h | 9 + arch/arm64/include/asm/pgtable-prot.h | 14 +- arch/arm64/include/asm/processor.h | 7 + arch/arm64/include/asm/sysreg.h | 20 + arch/arm64/include/asm/uaccess.h | 40 ++ arch/arm64/include/asm/vncr_mapping.h | 2 + arch/arm64/include/uapi/asm/hwcap.h | 3 +- arch/arm64/include/uapi/asm/ptrace.h | 8 + arch/arm64/include/uapi/asm/sigcontext.h | 9 + arch/arm64/kernel/cpufeature.c | 23 + arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/kernel/entry-common.c | 23 + arch/arm64/kernel/pi/idreg-override.c | 2 + arch/arm64/kernel/process.c | 94 +++ arch/arm64/kernel/ptrace.c | 62 +- arch/arm64/kernel/signal.c | 227 ++++++- arch/arm64/kernel/traps.c | 11 + arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 31 + arch/arm64/kvm/sys_regs.c | 27 +- arch/arm64/mm/Makefile | 1 + arch/arm64/mm/fault.c | 40 ++ arch/arm64/mm/gcs.c | 254 +++++++ arch/arm64/mm/mmap.c | 9 +- arch/arm64/tools/cpucaps | 1 + arch/x86/Kconfig | 1 + arch/x86/include/uapi/asm/mman.h | 3 - fs/proc/task_mmu.c | 2 +- include/linux/mm.h | 18 +- include/uapi/asm-generic/mman.h | 4 + include/uapi/linux/elf.h | 1 + include/uapi/linux/prctl.h | 22 + kernel/sys.c | 30 + mm/Kconfig | 6 + tools/testing/selftests/arm64/Makefile | 2 +- tools/testing/selftests/arm64/abi/hwcap.c | 19 + tools/testing/selftests/arm64/fp/assembler.h | 15 + tools/testing/selftests/arm64/fp/fpsimd-test.S | 2 + tools/testing/selftests/arm64/fp/sve-test.S | 2 + tools/testing/selftests/arm64/fp/za-test.S | 2 + tools/testing/selftests/arm64/fp/zt-test.S | 2 + tools/testing/selftests/arm64/gcs/.gitignore | 5 + tools/testing/selftests/arm64/gcs/Makefile | 24 + tools/testing/selftests/arm64/gcs/asm-offsets.h | 0 tools/testing/selftests/arm64/gcs/basic-gcs.c | 357 ++++++++++ tools/testing/selftests/arm64/gcs/gcs-locking.c | 200 ++++++ .../selftests/arm64/gcs/gcs-stress-thread.S | 311 +++++++++ tools/testing/selftests/arm64/gcs/gcs-stress.c | 530 +++++++++++++++ tools/testing/selftests/arm64/gcs/gcs-util.h | 100 +++ tools/testing/selftests/arm64/gcs/libc-gcs.c | 728 +++++++++++++++++++++ tools/testing/selftests/arm64/signal/.gitignore | 1 + .../testing/selftests/arm64/signal/test_signals.c | 17 +- .../testing/selftests/arm64/signal/test_signals.h | 6 + .../selftests/arm64/signal/test_signals_utils.c | 32 +- .../selftests/arm64/signal/test_signals_utils.h | 39 ++ .../arm64/signal/testcases/gcs_exception_fault.c | 62 ++ .../selftests/arm64/signal/testcases/gcs_frame.c | 88 +++ .../arm64/signal/testcases/gcs_write_fault.c | 67 ++ .../selftests/arm64/signal/testcases/testcases.c | 7 + .../selftests/arm64/signal/testcases/testcases.h | 1 + tools/testing/selftests/kvm/aarch64/get-reg-list.c | 28 + 75 files changed, 4120 insertions(+), 34 deletions(-) --- base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc change-id: 20230303-arm64-gcs-e311ab0d8729 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months, 2 weeks

6
56
0 0

[PATCH net-next 00/10] selftests: net: Introduce deferred commands

by Petr Machata

Recently, a defer helper was added to Python selftests. The idea is to keep cleanup commands close to their dirtying counterparts, thereby making it more transparent what is cleaning up what, making it harder to miss a cleanup, and make the whole cleanup business exception safe. All these benefits are applicable to bash as well, exception safety can be interpreted in terms of safety vs. a SIGINT. This patchset therefore introduces a framework of several helpers that serve to schedule cleanups in bash selftests. - Patch #1 has more details about the primitives being introduced. Patch #2 adds a fallback cleanup() function to lib.sh, because ideally selftests wouldn't need to introduce a dedicated cleanup function at all. - Patch #3 adds a parameter to stop_traffic(), which makes it possible to start other background processes after the traffic is started without confusing the cleanup. - Patches #4 to #10 convert a number of selftests. The goal was to convert all tests that use start_traffic / stop_traffic to the defer framework. Leftover traffic generators are a particularly painful sort of a missed cleanup. Normal unfinished cleanups can usually be cleaned up simply by rerunning the test and interrupting it early to let the cleanups run again / in full. This does not work with stop_traffic, because it is only issued at the end of the test case that starts the traffic. At the same time, leftover traffic generators influence follow-up test runs, and are hard to notice. The tests were however converted whole-sale, not just their traffic bits. Thus they form a proof of concept of the defer framework. v1 (from the RFC): - Patch #1: - Added the priority defer track - Dropped defer_scoped_fn, added in_defer_scope - Extracted to a separate independent module - Patch #2: - Moved this bit to a separate patch - Patch #3: - New patch - Patch #4 (RED): - Squashed the individual RED-related patches into one - Converted the SW datapath RED selftest as well - Patch #5 (TBF): - Fully converted the selftest, not just stop_traffic - Patches #6, #7, #8, #9, #10: - New patch Petr Machata (10): selftests: net: lib: Introduce deferred commands selftests: forwarding: Add a fallback cleanup() selftests: forwarding: lib: Allow passing PID to stop_traffic() selftests: RED: Use defer for test cleanup selftests: TBF: Use defer for test cleanup selftests: ETS: Use defer for test cleanup selftests: mlxsw: qos_mc_aware: Use defer for test cleanup selftests: mlxsw: qos_ets_strict: Use defer for test cleanup selftests: mlxsw: qos_max_descriptors: Use defer for test cleanup selftests: mlxsw: devlink_trap_police: Use defer for test cleanup .../drivers/net/mlxsw/devlink_trap_policer.sh | 85 ++++----- .../drivers/net/mlxsw/qos_ets_strict.sh | 167 ++++++++--------- .../drivers/net/mlxsw/qos_max_descriptors.sh | 118 +++++------- .../drivers/net/mlxsw/qos_mc_aware.sh | 146 +++++++-------- .../selftests/drivers/net/mlxsw/sch_ets.sh | 26 ++- .../drivers/net/mlxsw/sch_red_core.sh | 171 +++++++++--------- .../drivers/net/mlxsw/sch_red_ets.sh | 24 +-- .../drivers/net/mlxsw/sch_red_root.sh | 18 +- tools/testing/selftests/net/forwarding/lib.sh | 13 +- .../selftests/net/forwarding/sch_ets.sh | 7 +- .../selftests/net/forwarding/sch_ets_core.sh | 81 +++------ .../selftests/net/forwarding/sch_ets_tests.sh | 14 +- .../selftests/net/forwarding/sch_red.sh | 103 ++++------- .../selftests/net/forwarding/sch_tbf_core.sh | 91 +++------- .../net/forwarding/sch_tbf_etsprio.sh | 7 +- .../selftests/net/forwarding/sch_tbf_root.sh | 3 +- tools/testing/selftests/net/lib.sh | 3 + tools/testing/selftests/net/lib/Makefile | 2 +- tools/testing/selftests/net/lib/sh/defer.sh | 115 ++++++++++++ 19 files changed, 587 insertions(+), 607 deletions(-) create mode 100644 tools/testing/selftests/net/lib/sh/defer.sh -- 2.45.0

8 months, 2 weeks

2
14
0 0

[RFC PATCH 0/4] implement lightweight guard pages

by Lorenzo Stoakes

Userland library functions such as allocators and threading implementations often require regions of memory to act as 'guard pages' - mappings which, when accessed, result in a fatal signal being sent to the accessing process. The current means by which these are implemented is via a PROT_NONE mmap() mapping, which provides the required semantics however incur an overhead of a VMA for each such region. With a great many processes and threads, this can rapidly add up and incur a significant memory penalty. It also has the added problem of preventing merges that might otherwise be permitted. This series takes a different approach - an idea suggested by Vlasimil Babka (and before him David Hildenbrand and Jann Horn - perhaps more - the provenance becomes a little tricky to ascertain after this - please forgive any omissions!) - rather than locating the guard pages at the VMA layer, instead placing them in page tables mapping the required ranges. Early testing of the prototype version of this code suggests a 5 times speed up in memory mapping invocations (in conjunction with use of process_madvise()) and a 13% reduction in VMAs on an entirely idle android system and unoptimised code. We expect with optimisation and a loaded system with a larger number of guard pages this could significantly increase, but in any case these numbers are encouraging. This way, rather than having separate VMAs specifying which parts of a range are guard pages, instead we have a VMA spanning the entire range of memory a user is permitted to access and including ranges which are to be 'guarded'. After mapping this, a user can specify which parts of the range should result in a fatal signal when accessed. By restricting the ability to specify guard pages to memory mapped by existing VMAs, we can rely on the mappings being torn down when the mappings are ultimately unmapped and everything works simply as if the memory were not faulted in, from the point of view of the containing VMAs. This mechanism in effect poisons memory ranges similar to hardware memory poisoning, only it is an entirely software-controlled form of poisoning. Any poisoned region of memory is also able to 'unpoisoned', that is, to have its poison markers removed. The mechanism is implemented via madvise() behaviour - MADV_GUARD_POISON which simply poisons ranges - and MADV_GUARD_UNPOISON - which clears this poisoning. Poisoning can be performed across multiple VMAs and any existing mappings will be cleared, that is zapped, before installing the poisoned page table mappings. There is no concept of 'nested' poisoning, multiple attempts to poison a range will, after the first poisoning, have no effect. Importantly, unpoisoning of poisoned ranges has no effect on non-poisoned memory, so a user can safely unpoison a range of memory and clear only poison page table mappings leaving the rest intact. The actual mechanism by which the page table entries are specified makes use of existing logic - PTE markers, which are used for the userfaultfd UFFDIO_POISON mechanism. Unfortunately PTE_MARKER_POISONED is not suited for the guard page mechanism as it results in VM_FAULT_HWPOISON semantics in the fault handler, so we add our own specific PTE_MARKER_GUARD and adapt existing logic to handle it. We also extend the generic page walk mechanism to allow for installation of PTEs (carefully restricted to memory management logic only to prevent unwanted abuse). We ensure that zapping performed by, for instance, MADV_DONTNEED, does not remove guard poison markers, nor does forking (except when VM_WIPEONFORK is specified for a VMA which implies a total removal of memory characteristics). It's important to note that the guard page implementation is emphatically NOT a security feature, so a user can remove the poisoning if they wish. We simply implement it in such a way as to provide the least surprising behaviour. An extensive set of self-tests are provided which ensure behaviour is as expected and additionally self-documents expected behaviour of poisoned ranges. Suggested-by: Vlastimil Babka <vbabka(a)suze.cz> Suggested-by: Jann Horn <jannh(a)google.com> Suggested-by: David Hildenbrand <david(a)redhat.com> Lorenzo Stoakes (4): mm: pagewalk: add the ability to install PTEs mm: add PTE_MARKER_GUARD PTE marker mm: madvise: implement lightweight guard page mechanism selftests/mm: add self tests for guard page feature arch/alpha/include/uapi/asm/mman.h | 3 + arch/mips/include/uapi/asm/mman.h | 3 + arch/parisc/include/uapi/asm/mman.h | 3 + arch/xtensa/include/uapi/asm/mman.h | 3 + include/linux/mm_inline.h | 2 +- include/linux/pagewalk.h | 18 +- include/linux/swapops.h | 26 +- include/uapi/asm-generic/mman-common.h | 3 + mm/hugetlb.c | 3 + mm/internal.h | 6 + mm/madvise.c | 158 +++ mm/memory.c | 18 +- mm/mprotect.c | 3 +- mm/mseal.c | 1 + mm/pagewalk.c | 174 ++-- tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/guard-pages.c | 1168 ++++++++++++++++++++++ 18 files changed, 1525 insertions(+), 69 deletions(-) create mode 100644 tools/testing/selftests/mm/guard-pages.c -- 2.46.2

8 months, 2 weeks

6
24
0 0

[PATCH -next] selftests/cgroup: Fix compile error in test_cpu.c

by Xiu Jianfeng

From: Xiu Jianfeng <xiujianfeng(a)huawei.com> When compiling the cgroup selftests with the following command: make -C tools/testing/selftests/cgroup/ the compiler complains as below: test_cpu.c: In function ‘test_cpucg_nice’: test_cpu.c:284:39: error: incompatible type for argument 2 of ‘hog_cpus_timed’ 284 | hog_cpus_timed(cpucg, param); | ^~~~~ | | | struct cpu_hog_func_param test_cpu.c:132:53: note: expected ‘void *’ but argument is of type ‘struct cpu_hog_func_param’ 132 | static int hog_cpus_timed(const char *cgroup, void *arg) | ~~~~~~^~~ Fix it by passing the address of param to hog_cpus_timed(). Fixes: 2e82c0d4562a ("cgroup/rstat: Selftests for niced CPU statistics") Signed-off-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> --- tools/testing/selftests/cgroup/test_cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/test_cpu.c b/tools/testing/selftests/cgroup/test_cpu.c index 201ce14cb422..a2b50af8e9ee 100644 --- a/tools/testing/selftests/cgroup/test_cpu.c +++ b/tools/testing/selftests/cgroup/test_cpu.c @@ -281,7 +281,7 @@ static int test_cpucg_nice(const char *root) /* Try to keep niced CPU usage as constrained to hog_cpu as possible */ nice(1); - hog_cpus_timed(cpucg, param); + hog_cpus_timed(cpucg, &param); exit(0); } else { waitpid(pid, &status, 0); -- 2.34.1

8 months, 2 weeks

2
1
0 0

[PATCH v2 net-next] selftests: tc-testing: Fixed Typo error

by Karan Sanghavi

This commit combines two fixes for typographical errors in the "name" fields of the JSON objects with IDs "4319" and "4341" in the tc-testing selftests. For the files tc-tests/filters/cgroup.json and /tc-tests/filters/flow.json. v2: - Combine two earlier patches into one - Links to v1 of each patch [1] https://lore.kernel.org/all/Zqp9asVA-q_OzDP-@Emma/ [2] https://lore.kernel.org/all/Zqp92oXa9joXk4T9@Emma/ Signed-off-by: Karan Sanghavi <karansanghvi98(a)gmail.com> --- tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json | 2 +- tools/testing/selftests/tc-testing/tc-tests/filters/flow.json | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json b/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json index 03723cf84..6897ff5ad 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json @@ -1189,7 +1189,7 @@ }, { "id": "4319", - "name": "Replace cgroup filter with diffferent match", + "name": "Replace cgroup filter with different match", "category": [ "filter", "cgroup" diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json index 58189327f..996448afe 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json @@ -507,7 +507,7 @@ }, { "id": "4341", - "name": "Add flow filter with muliple ops", + "name": "Add flow filter with multiple ops", "category": [ "filter", "flow" -- 2.43.0

8 months, 2 weeks

2
1
0 0

[PATCH] selftests/intel_pstate: fix operand expected

by Alessandro Zanni

This fix solves these errors, when calling kselftest with targets "intel_pstate": - ./run.sh: line 90: / 1000: syntax error: operand expected (error token is "/ 1000") - ./run.sh: line 92: / 1000: syntax error: operand expected (error token is "/ 1000") To error was found by running tests manually with the command: make kselftest TARGETS=intel_pstate Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- tools/testing/selftests/intel_pstate/run.sh | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/intel_pstate/run.sh b/tools/testing/selftests/intel_pstate/run.sh index e7008f614ad7..39130a359535 100755 --- a/tools/testing/selftests/intel_pstate/run.sh +++ b/tools/testing/selftests/intel_pstate/run.sh @@ -87,9 +87,11 @@ mkt_freq=${_mkt_freq}0 # Get the ranges from cpupower _min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ') -min_freq=$(($_min_freq / 1000)) +min_freq=$((_min_freq / 1000)) +echo "min_freq:" +echo $min_freq _max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ') -max_freq=$(($_max_freq / 1000)) +max_freq=$((_max_freq / 1000)) [ $EVALUATE_ONLY -eq 0 ] && for freq in `seq $max_freq -100 $min_freq` -- 2.43.0

8 months, 2 weeks

2
1
0 0

[PATCH] selftests:timers: remove local CLOCKID defines

by Shuah Khan

timers tests defines CLOCKIDs locally. Remove all local CLOCKIDs except CLOCK_HWSPECIFIC and use defines from time.h header file. CLOCK_HWSPECIFIC and CLOCK_SGI_CYCLE are the same and CLOCK_SGI_CYCLE is deprecated, Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> --- tools/testing/selftests/timers/adjtick.c | 2 -- .../selftests/timers/alarmtimer-suspend.c | 15 --------------- .../selftests/timers/inconsistency-check.c | 19 ++++--------------- tools/testing/selftests/timers/nanosleep.c | 18 ++++-------------- tools/testing/selftests/timers/nsleep-lat.c | 19 ++++--------------- tools/testing/selftests/timers/raw_skew.c | 2 -- .../testing/selftests/timers/set-timer-lat.c | 16 +++------------- 7 files changed, 15 insertions(+), 76 deletions(-) diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c index cb9a30f54662..777d9494b683 100644 --- a/tools/testing/selftests/timers/adjtick.c +++ b/tools/testing/selftests/timers/adjtick.c @@ -26,8 +26,6 @@ #include "../kselftest.h" -#define CLOCK_MONOTONIC_RAW 4 - #define MILLION 1000000 long systick; diff --git a/tools/testing/selftests/timers/alarmtimer-suspend.c b/tools/testing/selftests/timers/alarmtimer-suspend.c index 62da2a3f949e..2da382df5eaa 100644 --- a/tools/testing/selftests/timers/alarmtimer-suspend.c +++ b/tools/testing/selftests/timers/alarmtimer-suspend.c @@ -31,21 +31,6 @@ #include <include/vdso/time64.h> #include "../kselftest.h" -#define CLOCK_REALTIME 0 -#define CLOCK_MONOTONIC 1 -#define CLOCK_PROCESS_CPUTIME_ID 2 -#define CLOCK_THREAD_CPUTIME_ID 3 -#define CLOCK_MONOTONIC_RAW 4 -#define CLOCK_REALTIME_COARSE 5 -#define CLOCK_MONOTONIC_COARSE 6 -#define CLOCK_BOOTTIME 7 -#define CLOCK_REALTIME_ALARM 8 -#define CLOCK_BOOTTIME_ALARM 9 -#define CLOCK_HWSPECIFIC 10 -#define CLOCK_TAI 11 -#define NR_CLOCKIDS 12 - - #define UNREASONABLE_LAT (NSEC_PER_SEC * 5) /* hopefully we resume in 5 secs */ #define SUSPEND_SECS 15 diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c index 75650cf0503f..9d1573769d55 100644 --- a/tools/testing/selftests/timers/inconsistency-check.c +++ b/tools/testing/selftests/timers/inconsistency-check.c @@ -31,21 +31,10 @@ #include <include/vdso/time64.h> #include "../kselftest.h" -#define CALLS_PER_LOOP 64 - -#define CLOCK_REALTIME 0 -#define CLOCK_MONOTONIC 1 -#define CLOCK_PROCESS_CPUTIME_ID 2 -#define CLOCK_THREAD_CPUTIME_ID 3 -#define CLOCK_MONOTONIC_RAW 4 -#define CLOCK_REALTIME_COARSE 5 -#define CLOCK_MONOTONIC_COARSE 6 -#define CLOCK_BOOTTIME 7 -#define CLOCK_REALTIME_ALARM 8 -#define CLOCK_BOOTTIME_ALARM 9 +/* CLOCK_HWSPECIFIC == CLOCK_SGI_CYCLE (Deprecated) */ #define CLOCK_HWSPECIFIC 10 -#define CLOCK_TAI 11 -#define NR_CLOCKIDS 12 + +#define CALLS_PER_LOOP 64 char *clockstring(int clockid) { @@ -152,7 +141,7 @@ int main(int argc, char *argv[]) { int clockid, opt; int userclock = CLOCK_REALTIME; - int maxclocks = NR_CLOCKIDS; + int maxclocks = CLOCK_TAI + 1; int runtime = 10; struct timespec ts; diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c index 9a354e38a569..252c6308c569 100644 --- a/tools/testing/selftests/timers/nanosleep.c +++ b/tools/testing/selftests/timers/nanosleep.c @@ -30,19 +30,8 @@ #include <include/vdso/time64.h> #include "../kselftest.h" -#define CLOCK_REALTIME 0 -#define CLOCK_MONOTONIC 1 -#define CLOCK_PROCESS_CPUTIME_ID 2 -#define CLOCK_THREAD_CPUTIME_ID 3 -#define CLOCK_MONOTONIC_RAW 4 -#define CLOCK_REALTIME_COARSE 5 -#define CLOCK_MONOTONIC_COARSE 6 -#define CLOCK_BOOTTIME 7 -#define CLOCK_REALTIME_ALARM 8 -#define CLOCK_BOOTTIME_ALARM 9 +/* CLOCK_HWSPECIFIC == CLOCK_SGI_CYCLE (Deprecated) */ #define CLOCK_HWSPECIFIC 10 -#define CLOCK_TAI 11 -#define NR_CLOCKIDS 12 #define UNSUPPORTED 0xf00f @@ -131,11 +120,12 @@ int main(int argc, char **argv) { long long length; int clockid, ret; + int max_clocks = CLOCK_TAI + 1; ksft_print_header(); - ksft_set_plan(NR_CLOCKIDS); + ksft_set_plan(max_clocks); - for (clockid = CLOCK_REALTIME; clockid < NR_CLOCKIDS; clockid++) { + for (clockid = CLOCK_REALTIME; clockid < max_clocks; clockid++) { /* Skip cputime clockids since nanosleep won't increment cputime */ if (clockid == CLOCK_PROCESS_CPUTIME_ID || diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c index f6a99490b291..de23dc0c9f97 100644 --- a/tools/testing/selftests/timers/nsleep-lat.c +++ b/tools/testing/selftests/timers/nsleep-lat.c @@ -29,20 +29,8 @@ #define UNRESONABLE_LATENCY 40000000 /* 40ms in nanosecs */ - -#define CLOCK_REALTIME 0 -#define CLOCK_MONOTONIC 1 -#define CLOCK_PROCESS_CPUTIME_ID 2 -#define CLOCK_THREAD_CPUTIME_ID 3 -#define CLOCK_MONOTONIC_RAW 4 -#define CLOCK_REALTIME_COARSE 5 -#define CLOCK_MONOTONIC_COARSE 6 -#define CLOCK_BOOTTIME 7 -#define CLOCK_REALTIME_ALARM 8 -#define CLOCK_BOOTTIME_ALARM 9 +/* CLOCK_HWSPECIFIC == CLOCK_SGI_CYCLE (Deprecated) */ #define CLOCK_HWSPECIFIC 10 -#define CLOCK_TAI 11 -#define NR_CLOCKIDS 12 #define UNSUPPORTED 0xf00f @@ -144,11 +132,12 @@ int main(int argc, char **argv) { long long length; int clockid, ret; + int max_clocks = CLOCK_TAI + 1; ksft_print_header(); - ksft_set_plan(NR_CLOCKIDS - CLOCK_REALTIME - SKIPPED_CLOCK_COUNT); + ksft_set_plan(max_clocks - CLOCK_REALTIME - SKIPPED_CLOCK_COUNT); - for (clockid = CLOCK_REALTIME; clockid < NR_CLOCKIDS; clockid++) { + for (clockid = CLOCK_REALTIME; clockid < max_clocks; clockid++) { /* Skip cputime clockids since nanosleep won't increment cputime */ if (clockid == CLOCK_PROCESS_CPUTIME_ID || diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c index ea50e4efc422..957f7cd29cb1 100644 --- a/tools/testing/selftests/timers/raw_skew.c +++ b/tools/testing/selftests/timers/raw_skew.c @@ -28,8 +28,6 @@ #include <include/vdso/time64.h> #include "../kselftest.h" -#define CLOCK_MONOTONIC_RAW 4 - #define shift_right(x, s) ({ \ __typeof__(x) __x = (x); \ __typeof__(s) __s = (s); \ diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c index 5365e9ae61c3..4574f8f04542 100644 --- a/tools/testing/selftests/timers/set-timer-lat.c +++ b/tools/testing/selftests/timers/set-timer-lat.c @@ -31,19 +31,8 @@ #include <include/vdso/time64.h> #include "../kselftest.h" -#define CLOCK_REALTIME 0 -#define CLOCK_MONOTONIC 1 -#define CLOCK_PROCESS_CPUTIME_ID 2 -#define CLOCK_THREAD_CPUTIME_ID 3 -#define CLOCK_MONOTONIC_RAW 4 -#define CLOCK_REALTIME_COARSE 5 -#define CLOCK_MONOTONIC_COARSE 6 -#define CLOCK_BOOTTIME 7 -#define CLOCK_REALTIME_ALARM 8 -#define CLOCK_BOOTTIME_ALARM 9 +/* CLOCK_HWSPECIFIC == CLOCK_SGI_CYCLE (Deprecated) */ #define CLOCK_HWSPECIFIC 10 -#define CLOCK_TAI 11 -#define NR_CLOCKIDS 12 #define UNRESONABLE_LATENCY 40000000 /* 40ms in nanosecs */ @@ -253,6 +242,7 @@ int main(void) struct sigaction act; int signum = SIGRTMAX; int ret = 0; + int max_clocks = CLOCK_TAI + 1; /* Set up signal handler: */ sigfillset(&act.sa_mask); @@ -261,7 +251,7 @@ int main(void) sigaction(signum, &act, NULL); printf("Setting timers for every %i seconds\n", TIMER_SECS); - for (clock_id = 0; clock_id < NR_CLOCKIDS; clock_id++) { + for (clock_id = 0; clock_id < max_clocks; clock_id++) { if ((clock_id == CLOCK_PROCESS_CPUTIME_ID) || (clock_id == CLOCK_THREAD_CPUTIME_ID) || -- 2.40.1

8 months, 2 weeks

3
3
0 0

[PATCH] selftests: timers: Remove unneeded semicolon

by Chen Ni

Remove unnecessary semicolons reported by Coccinelle/coccicheck and the semantic patch at scripts/coccinelle/misc/semicolon.cocci. Signed-off-by: Chen Ni <nichen(a)iscas.ac.cn> --- tools/testing/selftests/timers/set-timer-lat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c index 5365e9ae61c3..7a1a2382538c 100644 --- a/tools/testing/selftests/timers/set-timer-lat.c +++ b/tools/testing/selftests/timers/set-timer-lat.c @@ -79,7 +79,7 @@ char *clockstring(int clockid) return "CLOCK_BOOTTIME_ALARM"; case CLOCK_TAI: return "CLOCK_TAI"; - }; + } return "UNKNOWN_CLOCKID"; } -- 2.25.1

8 months, 2 weeks

3
3
0 0

[RFC PATCH] selftest/tcp-ao: Add filter tests

by Leo Stone

Add tests that check if getsockopt(TCP_AO_GET_KEYS) returns the right keys when using different filters. Sample output: > # ok 114 filter keys: by sndid, rcvid, address > # ok 115 filter keys: by sndid, rcvid > # ok 116 filter keys: by is_current > # ok 117 filter keys: by is_rnext Signed-off-by: Leo Stone <leocstone(a)gmail.com> --- This patch is meant to address the TODO in setsockopt-closed.c: > /* > * TODO: check getsockopt(TCP_AO_GET_KEYS) with different filters > * returning proper nr & keys; > */ Is this a reasonable way to do these tests? If so, what cases should I add? --- .../selftests/net/tcp_ao/setsockopt-closed.c | 158 +++++++++++++++++- 1 file changed, 157 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c b/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c index 084db4ecdff6..4c8aa06eef5a 100644 --- a/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c +++ b/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c @@ -6,6 +6,8 @@ static union tcp_addr tcp_md5_client; +#define FILTER_TEST_NKEYS 16 + static int test_port = 7788; static void make_listen(int sk) { @@ -813,12 +815,166 @@ static void duplicate_tests(void) setsockopt_checked(sk, TCP_AO_ADD_KEY, &ao, EEXIST, "duplicate: SendID differs"); } + +static void fetch_all_keys(int sk, struct tcp_ao_getsockopt *keys) +{ + socklen_t optlen = sizeof(struct tcp_ao_getsockopt); + + memset(keys, 0, sizeof(struct tcp_ao_getsockopt) * FILTER_TEST_NKEYS); + keys[0].get_all = 1; + keys[0].nkeys = FILTER_TEST_NKEYS; + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, &keys[0], &optlen)) + test_error("getsockopt"); +} + +static int prepare_test_keys(struct tcp_ao_getsockopt *keys) +{ + struct tcp_ao_add test_ao[FILTER_TEST_NKEYS]; + u8 rcvid = 100, sndid = 100; + const char *test_password = "Test password number "; + char test_password_scratch[64] = {}; + int sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP); + + if (sk < 0) + test_error("socket()"); + + for (int i = 0; i < FILTER_TEST_NKEYS; i++) { + snprintf(test_password_scratch, 64, "%s %d", test_password, i); + test_prepare_key(&test_ao[i], DEFAULT_TEST_ALGO, this_ip_dest, false, false, + DEFAULT_TEST_PREFIX, 0, sndid++, rcvid++, 0, 0, + strlen(test_password_scratch), test_password_scratch); + } + test_ao[0].set_current = 1; + test_ao[1].set_rnext = 1; + /* One key with a different addr and overlapping sndid, rcvid */ + tcp_addr_to_sockaddr_in(&test_ao[2].addr, &this_ip_addr, 0); + test_ao[2].sndid = 100; + test_ao[2].rcvid = 100; + + /* Add keys in a random order */ + for (int i = 0; i < FILTER_TEST_NKEYS; i++) { + int randidx = rand() % (FILTER_TEST_NKEYS - i); + + if (setsockopt(sk, IPPROTO_TCP, TCP_AO_ADD_KEY, &test_ao[randidx], + sizeof(struct tcp_ao_add))) + test_error("setsockopt()"); + memcpy(&test_ao[randidx], &test_ao[FILTER_TEST_NKEYS - 1 - i], + sizeof(struct tcp_ao_add)); + } + + fetch_all_keys(sk, keys); + + return sk; +} + +/* Assumes passwords are unique */ +static int compare_mkts(struct tcp_ao_getsockopt *expected, int nexpected, + struct tcp_ao_getsockopt *actual, int nactual) +{ + int matches = 0; + + for (int i = 0; i < nexpected; i++) { + for (int j = 0; j < nactual; j++) { + if (memcmp(expected[i].key, actual[j].key, TCP_AO_MAXKEYLEN) == 0) + matches++; + } + } + return nexpected - matches; +} + +static void filter_keys_checked(int sk, struct tcp_ao_getsockopt *filter, + struct tcp_ao_getsockopt *expected, + unsigned int nexpected, const char *tst) +{ + struct tcp_ao_getsockopt all_keys[FILTER_TEST_NKEYS] = {}; + struct tcp_ao_getsockopt filtered_keys[FILTER_TEST_NKEYS] = {}; + socklen_t len = sizeof(struct tcp_ao_getsockopt); + + fetch_all_keys(sk, all_keys); + memcpy(&filtered_keys[0], filter, sizeof(struct tcp_ao_getsockopt)); + filtered_keys[0].nkeys = FILTER_TEST_NKEYS; + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, filtered_keys, &len)) + test_error("getsockopt"); + if (filtered_keys[0].nkeys != nexpected) + test_error("wrong nr of keys, expected %u got %u", nexpected, + filtered_keys[0].nkeys); + if (compare_mkts(expected, nexpected, filtered_keys, filtered_keys[0].nkeys)) + test_error("got wrong keys back"); + test_ok("filter keys: %s", tst); + + close(sk); + memset(filter, 0, sizeof(struct tcp_ao_getsockopt)); +} + +static void filter_tests(void) +{ + struct tcp_ao_getsockopt original_keys[FILTER_TEST_NKEYS]; + struct tcp_ao_getsockopt expected_keys[FILTER_TEST_NKEYS]; + struct tcp_ao_getsockopt filter = {}; + int sk, f, nmatches; + + f = 2; + sk = prepare_test_keys(original_keys); + filter.rcvid = original_keys[f].rcvid; + filter.sndid = original_keys[f].sndid; + memcpy(&filter.addr, &original_keys[f].addr, sizeof(original_keys[f].addr)); + filter.prefix = original_keys[f].prefix; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by sndid, rcvid, address"); + + f = -1; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].is_current) { + f = i; + break; + } + } + if (f < 0) + test_error("No current key after adding one"); + filter.is_current = 1; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by is_current"); + + f = -1; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].is_rnext) { + f = i; + break; + } + } + if (f < 0) + test_error("No rnext key after adding one"); + filter.is_rnext = 1; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by is_rnext"); + + f = -1; + nmatches = 0; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].sndid == 100) { + f = i; + memcpy(&expected_keys[nmatches], &original_keys[i], + sizeof(struct tcp_ao_getsockopt)); + nmatches++; + } + } + if (f < 0) + test_error("No key for sndid 100"); + if (nmatches != 2) + test_error("Should have 2 keys with sndid 100"); + filter.rcvid = original_keys[f].rcvid; + filter.sndid = original_keys[f].sndid; + filter.addr.ss_family = test_family; + filter_keys_checked(sk, &filter, expected_keys, nmatches, "by sndid, rcvid"); +} + static void *client_fn(void *arg) { if (inet_pton(TEST_FAMILY, __TEST_CLIENT_IP(2), &tcp_md5_client) != 1) test_error("Can't convert ip address"); extend_tests(); einval_tests(); + filter_tests(); duplicate_tests(); /* * TODO: check getsockopt(TCP_AO_GET_KEYS) with different filters @@ -830,6 +986,6 @@ static void *client_fn(void *arg) int main(int argc, char *argv[]) { - test_init(121, client_fn, NULL); + test_init(125, client_fn, NULL); return 0; } -- 2.43.0

8 months, 2 weeks

2
1
0 0

[PATCH 6.6 206/213] selftests/rseq: Fix mm_cid test failure

by Greg Kroah-Hartman

6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> commit a0cc649353bb726d4aa0db60dce467432197b746 upstream. Adapt the rseq.c/rseq.h code to follow GNU C library changes introduced by: glibc commit 2e456ccf0c34 ("Linux: Make __rseq_size useful for feature detection (bug 31965)") Without this fix, rseq selftests for mm_cid fail: ./run_param_test.sh Default parameters Running test spinlock Running compare-twice test spinlock Running mm_cid test spinlock Error: cpu id getter unavailable Fixes: 18c2355838e7 ("selftests/rseq: Implement rseq mm_cid field support") Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Cc: Peter Zijlstra <peterz(a)infradead.org> CC: Boqun Feng <boqun.feng(a)gmail.com> CC: "Paul E. McKenney" <paulmck(a)kernel.org> Cc: Shuah Khan <skhan(a)linuxfoundation.org> CC: Carlos O'Donell <carlos(a)redhat.com> CC: Florian Weimer <fweimer(a)redhat.com> CC: linux-kselftest(a)vger.kernel.org CC: stable(a)vger.kernel.org Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- tools/testing/selftests/rseq/rseq.c | 110 ++++++++++++++++++++++++------------ tools/testing/selftests/rseq/rseq.h | 10 --- 2 files changed, 77 insertions(+), 43 deletions(-) --- a/tools/testing/selftests/rseq/rseq.c +++ b/tools/testing/selftests/rseq/rseq.c @@ -60,12 +60,6 @@ unsigned int rseq_size = -1U; /* Flags used during rseq registration. */ unsigned int rseq_flags; -/* - * rseq feature size supported by the kernel. 0 if the registration was - * unsuccessful. - */ -unsigned int rseq_feature_size = -1U; - static int rseq_ownership; static int rseq_reg_success; /* At least one rseq registration has succeded. */ @@ -111,6 +105,43 @@ int rseq_available(void) } } +/* The rseq areas need to be at least 32 bytes. */ +static +unsigned int get_rseq_min_alloc_size(void) +{ + unsigned int alloc_size = rseq_size; + + if (alloc_size < ORIG_RSEQ_ALLOC_SIZE) + alloc_size = ORIG_RSEQ_ALLOC_SIZE; + return alloc_size; +} + +/* + * Return the feature size supported by the kernel. + * + * Depending on the value returned by getauxval(AT_RSEQ_FEATURE_SIZE): + * + * 0: Return ORIG_RSEQ_FEATURE_SIZE (20) + * > 0: Return the value from getauxval(AT_RSEQ_FEATURE_SIZE). + * + * It should never return a value below ORIG_RSEQ_FEATURE_SIZE. + */ +static +unsigned int get_rseq_kernel_feature_size(void) +{ + unsigned long auxv_rseq_feature_size, auxv_rseq_align; + + auxv_rseq_align = getauxval(AT_RSEQ_ALIGN); + assert(!auxv_rseq_align || auxv_rseq_align <= RSEQ_THREAD_AREA_ALLOC_SIZE); + + auxv_rseq_feature_size = getauxval(AT_RSEQ_FEATURE_SIZE); + assert(!auxv_rseq_feature_size || auxv_rseq_feature_size <= RSEQ_THREAD_AREA_ALLOC_SIZE); + if (auxv_rseq_feature_size) + return auxv_rseq_feature_size; + else + return ORIG_RSEQ_FEATURE_SIZE; +} + int rseq_register_current_thread(void) { int rc; @@ -119,7 +150,7 @@ int rseq_register_current_thread(void) /* Treat libc's ownership as a successful registration. */ return 0; } - rc = sys_rseq(&__rseq_abi, rseq_size, 0, RSEQ_SIG); + rc = sys_rseq(&__rseq_abi, get_rseq_min_alloc_size(), 0, RSEQ_SIG); if (rc) { if (RSEQ_READ_ONCE(rseq_reg_success)) { /* Incoherent success/failure within process. */ @@ -140,28 +171,12 @@ int rseq_unregister_current_thread(void) /* Treat libc's ownership as a successful unregistration. */ return 0; } - rc = sys_rseq(&__rseq_abi, rseq_size, RSEQ_ABI_FLAG_UNREGISTER, RSEQ_SIG); + rc = sys_rseq(&__rseq_abi, get_rseq_min_alloc_size(), RSEQ_ABI_FLAG_UNREGISTER, RSEQ_SIG); if (rc) return -1; return 0; } -static -unsigned int get_rseq_feature_size(void) -{ - unsigned long auxv_rseq_feature_size, auxv_rseq_align; - - auxv_rseq_align = getauxval(AT_RSEQ_ALIGN); - assert(!auxv_rseq_align || auxv_rseq_align <= RSEQ_THREAD_AREA_ALLOC_SIZE); - - auxv_rseq_feature_size = getauxval(AT_RSEQ_FEATURE_SIZE); - assert(!auxv_rseq_feature_size || auxv_rseq_feature_size <= RSEQ_THREAD_AREA_ALLOC_SIZE); - if (auxv_rseq_feature_size) - return auxv_rseq_feature_size; - else - return ORIG_RSEQ_FEATURE_SIZE; -} - static __attribute__((constructor)) void rseq_init(void) { @@ -178,28 +193,54 @@ void rseq_init(void) } if (libc_rseq_size_p && libc_rseq_offset_p && libc_rseq_flags_p && *libc_rseq_size_p != 0) { + unsigned int libc_rseq_size; + /* rseq registration owned by glibc */ rseq_offset = *libc_rseq_offset_p; - rseq_size = *libc_rseq_size_p; + libc_rseq_size = *libc_rseq_size_p; rseq_flags = *libc_rseq_flags_p; - rseq_feature_size = get_rseq_feature_size(); - if (rseq_feature_size > rseq_size) - rseq_feature_size = rseq_size; + + /* + * Previous versions of glibc expose the value + * 32 even though the kernel only supported 20 + * bytes initially. Therefore treat 32 as a + * special-case. glibc 2.40 exposes a 20 bytes + * __rseq_size without using getauxval(3) to + * query the supported size, while still allocating a 32 + * bytes area. Also treat 20 as a special-case. + * + * Special-cases are handled by using the following + * value as active feature set size: + * + * rseq_size = min(32, get_rseq_kernel_feature_size()) + */ + switch (libc_rseq_size) { + case ORIG_RSEQ_FEATURE_SIZE: + fallthrough; + case ORIG_RSEQ_ALLOC_SIZE: + { + unsigned int rseq_kernel_feature_size = get_rseq_kernel_feature_size(); + + if (rseq_kernel_feature_size < ORIG_RSEQ_ALLOC_SIZE) + rseq_size = rseq_kernel_feature_size; + else + rseq_size = ORIG_RSEQ_ALLOC_SIZE; + break; + } + default: + /* Otherwise just use the __rseq_size from libc as rseq_size. */ + rseq_size = libc_rseq_size; + break; + } return; } rseq_ownership = 1; if (!rseq_available()) { rseq_size = 0; - rseq_feature_size = 0; return; } rseq_offset = (void *)&__rseq_abi - rseq_thread_pointer(); rseq_flags = 0; - rseq_feature_size = get_rseq_feature_size(); - if (rseq_feature_size == ORIG_RSEQ_FEATURE_SIZE) - rseq_size = ORIG_RSEQ_ALLOC_SIZE; - else - rseq_size = RSEQ_THREAD_AREA_ALLOC_SIZE; } static __attribute__((destructor)) @@ -209,7 +250,6 @@ void rseq_exit(void) return; rseq_offset = 0; rseq_size = -1U; - rseq_feature_size = -1U; rseq_ownership = 0; } --- a/tools/testing/selftests/rseq/rseq.h +++ b/tools/testing/selftests/rseq/rseq.h @@ -68,12 +68,6 @@ extern unsigned int rseq_size; /* Flags used during rseq registration. */ extern unsigned int rseq_flags; -/* - * rseq feature size supported by the kernel. 0 if the registration was - * unsuccessful. - */ -extern unsigned int rseq_feature_size; - enum rseq_mo { RSEQ_MO_RELAXED = 0, RSEQ_MO_CONSUME = 1, /* Unused */ @@ -193,7 +187,7 @@ static inline uint32_t rseq_current_cpu( static inline bool rseq_node_id_available(void) { - return (int) rseq_feature_size >= rseq_offsetofend(struct rseq_abi, node_id); + return (int) rseq_size >= rseq_offsetofend(struct rseq_abi, node_id); } /* @@ -207,7 +201,7 @@ static inline uint32_t rseq_current_node static inline bool rseq_mm_cid_available(void) { - return (int) rseq_feature_size >= rseq_offsetofend(struct rseq_abi, mm_cid); + return (int) rseq_size >= rseq_offsetofend(struct rseq_abi, mm_cid); } static inline uint32_t rseq_current_mm_cid(void)

8 months, 2 weeks

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[PATCH 6.11 205/214] selftests/rseq: Fix mm_cid test failure

by Greg Kroah-Hartman

6.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> commit a0cc649353bb726d4aa0db60dce467432197b746 upstream. Adapt the rseq.c/rseq.h code to follow GNU C library changes introduced by: glibc commit 2e456ccf0c34 ("Linux: Make __rseq_size useful for feature detection (bug 31965)") Without this fix, rseq selftests for mm_cid fail: ./run_param_test.sh Default parameters Running test spinlock Running compare-twice test spinlock Running mm_cid test spinlock Error: cpu id getter unavailable Fixes: 18c2355838e7 ("selftests/rseq: Implement rseq mm_cid field support") Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Cc: Peter Zijlstra <peterz(a)infradead.org> CC: Boqun Feng <boqun.feng(a)gmail.com> CC: "Paul E. McKenney" <paulmck(a)kernel.org> Cc: Shuah Khan <skhan(a)linuxfoundation.org> CC: Carlos O'Donell <carlos(a)redhat.com> CC: Florian Weimer <fweimer(a)redhat.com> CC: linux-kselftest(a)vger.kernel.org CC: stable(a)vger.kernel.org Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- tools/testing/selftests/rseq/rseq.c | 110 ++++++++++++++++++++++++------------ tools/testing/selftests/rseq/rseq.h | 10 --- 2 files changed, 77 insertions(+), 43 deletions(-) --- a/tools/testing/selftests/rseq/rseq.c +++ b/tools/testing/selftests/rseq/rseq.c @@ -60,12 +60,6 @@ unsigned int rseq_size = -1U; /* Flags used during rseq registration. */ unsigned int rseq_flags; -/* - * rseq feature size supported by the kernel. 0 if the registration was - * unsuccessful. - */ -unsigned int rseq_feature_size = -1U; - static int rseq_ownership; static int rseq_reg_success; /* At least one rseq registration has succeded. */ @@ -111,6 +105,43 @@ int rseq_available(void) } } +/* The rseq areas need to be at least 32 bytes. */ +static +unsigned int get_rseq_min_alloc_size(void) +{ + unsigned int alloc_size = rseq_size; + + if (alloc_size < ORIG_RSEQ_ALLOC_SIZE) + alloc_size = ORIG_RSEQ_ALLOC_SIZE; + return alloc_size; +} + +/* + * Return the feature size supported by the kernel. + * + * Depending on the value returned by getauxval(AT_RSEQ_FEATURE_SIZE): + * + * 0: Return ORIG_RSEQ_FEATURE_SIZE (20) + * > 0: Return the value from getauxval(AT_RSEQ_FEATURE_SIZE). + * + * It should never return a value below ORIG_RSEQ_FEATURE_SIZE. + */ +static +unsigned int get_rseq_kernel_feature_size(void) +{ + unsigned long auxv_rseq_feature_size, auxv_rseq_align; + + auxv_rseq_align = getauxval(AT_RSEQ_ALIGN); + assert(!auxv_rseq_align || auxv_rseq_align <= RSEQ_THREAD_AREA_ALLOC_SIZE); + + auxv_rseq_feature_size = getauxval(AT_RSEQ_FEATURE_SIZE); + assert(!auxv_rseq_feature_size || auxv_rseq_feature_size <= RSEQ_THREAD_AREA_ALLOC_SIZE); + if (auxv_rseq_feature_size) + return auxv_rseq_feature_size; + else + return ORIG_RSEQ_FEATURE_SIZE; +} + int rseq_register_current_thread(void) { int rc; @@ -119,7 +150,7 @@ int rseq_register_current_thread(void) /* Treat libc's ownership as a successful registration. */ return 0; } - rc = sys_rseq(&__rseq_abi, rseq_size, 0, RSEQ_SIG); + rc = sys_rseq(&__rseq_abi, get_rseq_min_alloc_size(), 0, RSEQ_SIG); if (rc) { if (RSEQ_READ_ONCE(rseq_reg_success)) { /* Incoherent success/failure within process. */ @@ -140,28 +171,12 @@ int rseq_unregister_current_thread(void) /* Treat libc's ownership as a successful unregistration. */ return 0; } - rc = sys_rseq(&__rseq_abi, rseq_size, RSEQ_ABI_FLAG_UNREGISTER, RSEQ_SIG); + rc = sys_rseq(&__rseq_abi, get_rseq_min_alloc_size(), RSEQ_ABI_FLAG_UNREGISTER, RSEQ_SIG); if (rc) return -1; return 0; } -static -unsigned int get_rseq_feature_size(void) -{ - unsigned long auxv_rseq_feature_size, auxv_rseq_align; - - auxv_rseq_align = getauxval(AT_RSEQ_ALIGN); - assert(!auxv_rseq_align || auxv_rseq_align <= RSEQ_THREAD_AREA_ALLOC_SIZE); - - auxv_rseq_feature_size = getauxval(AT_RSEQ_FEATURE_SIZE); - assert(!auxv_rseq_feature_size || auxv_rseq_feature_size <= RSEQ_THREAD_AREA_ALLOC_SIZE); - if (auxv_rseq_feature_size) - return auxv_rseq_feature_size; - else - return ORIG_RSEQ_FEATURE_SIZE; -} - static __attribute__((constructor)) void rseq_init(void) { @@ -178,28 +193,54 @@ void rseq_init(void) } if (libc_rseq_size_p && libc_rseq_offset_p && libc_rseq_flags_p && *libc_rseq_size_p != 0) { + unsigned int libc_rseq_size; + /* rseq registration owned by glibc */ rseq_offset = *libc_rseq_offset_p; - rseq_size = *libc_rseq_size_p; + libc_rseq_size = *libc_rseq_size_p; rseq_flags = *libc_rseq_flags_p; - rseq_feature_size = get_rseq_feature_size(); - if (rseq_feature_size > rseq_size) - rseq_feature_size = rseq_size; + + /* + * Previous versions of glibc expose the value + * 32 even though the kernel only supported 20 + * bytes initially. Therefore treat 32 as a + * special-case. glibc 2.40 exposes a 20 bytes + * __rseq_size without using getauxval(3) to + * query the supported size, while still allocating a 32 + * bytes area. Also treat 20 as a special-case. + * + * Special-cases are handled by using the following + * value as active feature set size: + * + * rseq_size = min(32, get_rseq_kernel_feature_size()) + */ + switch (libc_rseq_size) { + case ORIG_RSEQ_FEATURE_SIZE: + fallthrough; + case ORIG_RSEQ_ALLOC_SIZE: + { + unsigned int rseq_kernel_feature_size = get_rseq_kernel_feature_size(); + + if (rseq_kernel_feature_size < ORIG_RSEQ_ALLOC_SIZE) + rseq_size = rseq_kernel_feature_size; + else + rseq_size = ORIG_RSEQ_ALLOC_SIZE; + break; + } + default: + /* Otherwise just use the __rseq_size from libc as rseq_size. */ + rseq_size = libc_rseq_size; + break; + } return; } rseq_ownership = 1; if (!rseq_available()) { rseq_size = 0; - rseq_feature_size = 0; return; } rseq_offset = (void *)&__rseq_abi - rseq_thread_pointer(); rseq_flags = 0; - rseq_feature_size = get_rseq_feature_size(); - if (rseq_feature_size == ORIG_RSEQ_FEATURE_SIZE) - rseq_size = ORIG_RSEQ_ALLOC_SIZE; - else - rseq_size = RSEQ_THREAD_AREA_ALLOC_SIZE; } static __attribute__((destructor)) @@ -209,7 +250,6 @@ void rseq_exit(void) return; rseq_offset = 0; rseq_size = -1U; - rseq_feature_size = -1U; rseq_ownership = 0; } --- a/tools/testing/selftests/rseq/rseq.h +++ b/tools/testing/selftests/rseq/rseq.h @@ -68,12 +68,6 @@ extern unsigned int rseq_size; /* Flags used during rseq registration. */ extern unsigned int rseq_flags; -/* - * rseq feature size supported by the kernel. 0 if the registration was - * unsuccessful. - */ -extern unsigned int rseq_feature_size; - enum rseq_mo { RSEQ_MO_RELAXED = 0, RSEQ_MO_CONSUME = 1, /* Unused */ @@ -193,7 +187,7 @@ static inline uint32_t rseq_current_cpu( static inline bool rseq_node_id_available(void) { - return (int) rseq_feature_size >= rseq_offsetofend(struct rseq_abi, node_id); + return (int) rseq_size >= rseq_offsetofend(struct rseq_abi, node_id); } /* @@ -207,7 +201,7 @@ static inline uint32_t rseq_current_node static inline bool rseq_mm_cid_available(void) { - return (int) rseq_feature_size >= rseq_offsetofend(struct rseq_abi, mm_cid); + return (int) rseq_size >= rseq_offsetofend(struct rseq_abi, mm_cid); } static inline uint32_t rseq_current_mm_cid(void)

8 months, 2 weeks

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[PATCH bpf-next v1 0/3] Improve .BTF_ids patching and alignment

by Tony Ambardar

Hello all, This patch series offers improvements to the way .BTF_ids section data is created and later patched by resolve_btfids. Patch #1 simplifies the byte-order translation in resolve_btfids while making it more resilient to future .BTF_ids encoding updates. Patch #2 makes sure all BTF ID data is 4-byte aligned, and not only the .BTF_ids used for vmlinux. Patch #3 syncs the above changes in btf_ids.h to tools/include, obviating a previous alignment fix in selftests/bpf. Feedback and suggestions are welcome! Best regards, Tony Tony Ambardar (3): tools/resolve_btfids: Simplify handling cross-endian compilation bpf: btf: Ensure natural alignment of .BTF_ids section tools/bpf, selftests/bpf : Sync btf_ids.h to tools include/linux/btf_ids.h | 1 + tools/bpf/resolve_btfids/main.c | 60 +++++--------- tools/include/linux/btf_ids.h | 80 +++++++++++++++++-- .../selftests/bpf/prog_tests/resolve_btfids.c | 6 -- 4 files changed, 97 insertions(+), 50 deletions(-) -- 2.34.1

8 months, 2 weeks

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kselftest/fixes kselftest-cpufreq: 3 runs, 3 regressions (linux_kselftest-fixes-6.12-rc3)

by kernelci.org bot

kselftest/fixes kselftest-cpufreq: 3 runs, 3 regressions (linux_kselftest-fixes-6.12-rc3) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 sun50i-h5-lib...ch-all-h3-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-cpufreq Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc3 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 4ee5ca9a29384fcf3f18232fdf8474166dea8dca Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/670d07df5ce1577dbec86858 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/670d07df5ce1577dbec86859 failing since 5 days (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/670d09462706bb6cd8c8685d Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/670d09472706bb6cd8c8685e failing since 5 days (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ sun50i-h5-lib...ch-all-h3-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/670d068aaf8e516253c8685f Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/670d068aaf8e516253c86860 failing since 5 days (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

8 months, 2 weeks

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kselftest/fixes kselftest-seccomp: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc3)

by kernelci.org bot

kselftest/fixes kselftest-seccomp: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc3) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-seccomp Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc3 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 4ee5ca9a29384fcf3f18232fdf8474166dea8dca Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/670d07f5cd937325b5c86857 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-seccomp.login: https://kernelci.org/test/case/id/670d07f5cd937325b5c86858 failing since 5 days (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

8 months, 2 weeks

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kselftest/fixes kselftest-lib: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc3)

by kernelci.org bot

kselftest/fixes kselftest-lib: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc3) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-lib Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc3 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 4ee5ca9a29384fcf3f18232fdf8474166dea8dca Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/670d06ca62e90ff6e7c86855 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lib.login: https://kernelci.org/test/case/id/670d06ca62e90ff6e7c86856 failing since 5 days (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

8 months, 2 weeks

1
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0 0

kselftest/fixes build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-fixes-6.12-rc3)

by kernelci.org bot

kselftest/fixes build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-fixes-6.12-rc3) Full Build Summary: https://kernelci.org/build/kselftest/branch/fixes/kernel/linux_kselftest-fi… Tree: kselftest Branch: fixes Git Describe: linux_kselftest-fixes-6.12-rc3 Git Commit: 4ee5ca9a29384fcf3f18232fdf8474166dea8dca Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

8 months, 3 weeks

1
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[PATCH v1 0/1] update mseal.rst

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)chromium.org> Pedro Falcato's optimization [1] for checking sealed VMAs, which replaces the can_modify_mm() function with an in-loop check, necessitates an update to the mseal.rst documentation to reflect this change. Furthermore, the document has received offline comments regarding the code sample and suggestions for sentence clarification to enhance reader comprehension. [1] https://lore.kernel.org/linux-mm/20240817-mseal-depessimize-v3-0-d8d2e037df… Jeff Xu (1): mseal: update mseal.rst Documentation/userspace-api/mseal.rst | 290 ++++++++++++-------------- 1 file changed, 136 insertions(+), 154 deletions(-) -- 2.46.1.824.gd892dcdcdd-goog

8 months, 3 weeks

5
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[PATCH V12 00/14] perf/core: Add ability for an event to "pause" or "resume" AUX area tracing

by Adrian Hunter

Hi Note for V12: There was a small conflict between the Intel PT changes in "KVM: x86: Fix Intel PT Host/Guest mode when host tracing" and the changes in this patch set, so I have put the patch sets together, along with outstanding fix "perf/x86/intel/pt: Fix buffer full but size is 0 case" Cover letter for KVM changes (patches 2 to 4): There is a long-standing problem whereby running Intel PT on host and guest in Host/Guest mode, causes VM-Entry failure. The motivation for this patch set is to provide a fix for stable kernels prior to the advent of the "Mediated Passthrough vPMU" patch set: https://lore.kernel.org/kvm/20240801045907.4010984-1-mizhang@google.com/ which would render a large part of the fix unnecessary but likely not be suitable for backport to stable due to its size and complexity. Ideally, this patch set would be applied before "Mediated Passthrough vPMU" Note that the fix does not conflict with "Mediated Passthrough vPMU", it is just that "Mediated Passthrough vPMU" will make the code to stop and restart Intel PT unnecessary. Note for V11: Moving aux_paused into a union within struct hw_perf_event caused a regression because aux_paused was being written unconditionally even though it is valid only for AUX (e.g. Intel PT) PMUs. That is fixed in V11. Hardware traces, such as instruction traces, can produce a vast amount of trace data, so being able to reduce tracing to more specific circumstances can be useful. The ability to pause or resume tracing when another event happens, can do that. These patches add such a facilty and show how it would work for Intel Processor Trace. Maintainers of other AUX area tracing implementations are requested to consider if this is something they might employ and then whether or not the ABI would work for them. Note, thank you to James Clark (ARM) for evaluating the API for Coresight. Suzuki K Poulose (ARM) also responded positively to the RFC. Changes to perf tools are now (since V4) fleshed out. Please note, Intel® Architecture Instruction Set Extensions and Future Features Programming Reference March 2024 319433-052, currently: https://cdrdv2.intel.com/v1/dl/getContent/671368 introduces hardware pause / resume for Intel PT in a feature named Intel PT Trigger Tracing. For that more fields in perf_event_attr will be necessary. The main differences are: - it can be applied not just to overflows, but optionally to every event - a packet is emitted into the trace, optionally with IP information - no PMI - works with PMC and DR (breakpoint) events only Here are the proposed additions to perf_event_attr, please comment: diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h index 0c557f0a17b3..05dcc43f11bb 100644 --- a/tools/include/uapi/linux/perf_event.h +++ b/tools/include/uapi/linux/perf_event.h @@ -369,6 +369,22 @@ enum perf_event_read_format { PERF_FORMAT_MAX = 1U << 5, /* non-ABI */ }; +enum { + PERF_AUX_ACTION_START_PAUSED = 1U << 0, + PERF_AUX_ACTION_PAUSE = 1U << 1, + PERF_AUX_ACTION_RESUME = 1U << 2, + PERF_AUX_ACTION_EMIT = 1U << 3, + PERF_AUX_ACTION_NR = 0x1f << 4, + PERF_AUX_ACTION_NO_IP = 1U << 9, + PERF_AUX_ACTION_PAUSE_ON_EVT = 1U << 10, + PERF_AUX_ACTION_RESUME_ON_EVT = 1U << 11, + PERF_AUX_ACTION_EMIT_ON_EVT = 1U << 12, + PERF_AUX_ACTION_NR_ON_EVT = 0x1f << 13, + PERF_AUX_ACTION_NO_IP_ON_EVT = 1U << 18, + PERF_AUX_ACTION_MASK = ~PERF_AUX_ACTION_START_PAUSED, + PERF_AUX_PAUSE_RESUME_MASK = PERF_AUX_ACTION_PAUSE | PERF_AUX_ACTION_RESUME, +}; + #define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */ #define PERF_ATTR_SIZE_VER1 72 /* add: config2 */ #define PERF_ATTR_SIZE_VER2 80 /* add: branch_sample_type */ @@ -515,10 +531,19 @@ struct perf_event_attr { union { __u32 aux_action; struct { - __u32 aux_start_paused : 1, /* start AUX area tracing paused */ - aux_pause : 1, /* on overflow, pause AUX area tracing */ - aux_resume : 1, /* on overflow, resume AUX area tracing */ - __reserved_3 : 29; + __u32 aux_start_paused : 1, /* start AUX area tracing paused */ + aux_pause : 1, /* on overflow, pause AUX area tracing */ + aux_resume : 1, /* on overflow, resume AUX area tracing */ + aux_emit : 1, /* generate AUX records instead of events */ + aux_nr : 5, /* AUX area tracing reference number */ + aux_no_ip : 1, /* suppress IP in AUX records */ + /* Following apply to event occurrence not overflows */ + aux_pause_on_evt : 1, /* on event, pause AUX area tracing */ + aux_resume_on_evt : 1, /* on event, resume AUX area tracing */ + aux_emit_on_evt : 1, /* generate AUX records instead of events */ + aux_nr_on_evt : 5, /* AUX area tracing reference number */ + aux_no_ip_on_evt : 1, /* suppress IP in AUX records */ + __reserved_3 : 13; }; }; Changes in V12: Add previously sent patch "perf/x86/intel/pt: Fix buffer full but size is 0 case" Add previously sent patch set "KVM: x86: Fix Intel PT Host/Guest mode when host tracing" Rebase on current tip plus patch set "KVM: x86: Fix Intel PT Host/Guest mode when host tracing" Changes in V11: perf/core: Add aux_pause, aux_resume, aux_start_paused Make assignment to event->hw.aux_paused conditional on (pmu->capabilities & PERF_PMU_CAP_AUX_PAUSE). perf/x86/intel: Do not enable large PEBS for events with aux actions or aux sampling Remove definition of has_aux_action() because it has already been added as an inline function. perf/x86/intel/pt: Fix sampling synchronization perf tools: Enable evsel__is_aux_event() to work for ARM/ARM64 perf tools: Enable evsel__is_aux_event() to work for S390_CPUMSF Dropped because they have already been applied Changes in V10: perf/core: Add aux_pause, aux_resume, aux_start_paused Move aux_paused into a union within struct hw_perf_event. Additional comment wrt PERF_EF_PAUSE/PERF_EF_RESUME. Factor out has_aux_action() as an inline function. Use scoped_guard for irqsave. Move calls of perf_event_aux_pause() from __perf_event_output() to __perf_event_overflow(). Changes in V9: perf/x86/intel/pt: Fix sampling synchronization New patch perf/core: Add aux_pause, aux_resume, aux_start_paused Move aux_paused to struct hw_perf_event perf/x86/intel/pt: Add support for pause / resume Add more comments and barriers for resume_allowed and pause_allowed Always use WRITE_ONCE with resume_allowed Changes in V8: perf tools: Parse aux-action Fix clang warning: util/auxtrace.c:821:7: error: missing field 'aux_action' initializer [-Werror,-Wmissing-field-initializers] 821 | {NULL}, | ^ Changes in V7: Add Andi's Reviewed-by for patches 2-12 Re-base Changes in V6: perf/core: Add aux_pause, aux_resume, aux_start_paused Removed READ/WRITE_ONCE from __perf_event_aux_pause() Expanded comment about guarding against NMI Changes in V5: perf/core: Add aux_pause, aux_resume, aux_start_paused Added James' Ack perf/x86/intel: Do not enable large PEBS for events with aux actions or aux sampling New patch perf tools Added Ian's Ack Changes in V4: perf/core: Add aux_pause, aux_resume, aux_start_paused Rename aux_output_cfg -> aux_action Reorder aux_action bits from: aux_pause, aux_resume, aux_start_paused to: aux_start_paused, aux_pause, aux_resume Fix aux_action bits __u64 -> __u32 coresight: Have a stab at support for pause / resume Dropped perf tools All new patches Changes in RFC V3: coresight: Have a stab at support for pause / resume 'mode' -> 'flags' so it at least compiles Changes in RFC V2: Use ->stop() / ->start() instead of ->pause_resume() Move aux_start_paused bit into aux_output_cfg Tighten up when Intel PT pause / resume is allowed Add an example of how it might work for CoreSight Adrian Hunter (14): perf/x86/intel/pt: Fix buffer full but size is 0 case KVM: x86: Fix Intel PT IA32_RTIT_CTL MSR validation KVM: x86: Fix Intel PT Host/Guest mode when host tracing also KVM: selftests: Add guest Intel PT test perf/core: Add aux_pause, aux_resume, aux_start_paused perf/x86/intel/pt: Add support for pause / resume perf/x86/intel: Do not enable large PEBS for events with aux actions or aux sampling perf tools: Add aux_start_paused, aux_pause and aux_resume perf tools: Add aux-action config term perf tools: Parse aux-action perf tools: Add missing_features for aux_start_paused, aux_pause, aux_resume perf intel-pt: Improve man page format perf intel-pt: Add documentation for pause / resume perf intel-pt: Add a test for pause / resume arch/x86/events/intel/core.c | 4 +- arch/x86/events/intel/pt.c | 209 +++++++- arch/x86/events/intel/pt.h | 16 + arch/x86/include/asm/intel_pt.h | 4 + arch/x86/kvm/vmx/vmx.c | 26 +- arch/x86/kvm/vmx/vmx.h | 1 - include/linux/perf_event.h | 28 + include/uapi/linux/perf_event.h | 11 +- kernel/events/core.c | 72 ++- kernel/events/internal.h | 1 + tools/include/uapi/linux/perf_event.h | 11 +- tools/perf/Documentation/perf-intel-pt.txt | 596 +++++++++++++-------- tools/perf/Documentation/perf-record.txt | 4 + tools/perf/builtin-record.c | 4 +- tools/perf/tests/shell/test_intel_pt.sh | 28 + tools/perf/util/auxtrace.c | 67 ++- tools/perf/util/auxtrace.h | 6 +- tools/perf/util/evsel.c | 13 +- tools/perf/util/evsel.h | 1 + tools/perf/util/evsel_config.h | 1 + tools/perf/util/parse-events.c | 10 + tools/perf/util/parse-events.h | 1 + tools/perf/util/parse-events.l | 1 + tools/perf/util/perf_event_attr_fprintf.c | 3 + tools/perf/util/pmu.c | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/include/x86_64/processor.h | 1 + tools/testing/selftests/kvm/x86_64/intel_pt.c | 381 +++++++++++++ 28 files changed, 1238 insertions(+), 264 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/intel_pt.c Regards Adrian

8 months, 3 weeks

2
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[PATCH net-next 0/3] Threads support in proc connector

by Anjali Kulkarni

Recently we committed a fix to allow processes to receive notifications for non-zero exits via the process connector module. Commit is a4c9a56e6a2c. However, for threads, when it does a pthread_exit(&exit_status) call, the kernel is not aware of the exit status with which pthread_exit is called. It is sent by child thread to the parent process, if it is waiting in pthread_join(). Hence, for a thread exiting abnormally, kernel cannot send notifications to any listening processes. The exception to this is if the thread is sent a signal which it has not handled, and dies along with it's process as a result; for eg. SIGSEGV or SIGKILL. In this case, kernel is aware of the non-zero exit and sends a notification for it. For our use case, we cannot have parent wait in pthread_join, one of the main reasons for this being that we do not want to track normal pthread_exit(), which could be a very large number. We only want to be notified of any abnormal exits. Hence, threads are created with pthread_attr_t set to PTHREAD_CREATE_DETACHED. To fix this problem, we add a new type PROC_CN_MCAST_NOTIFY to proc connector API, which allows a thread to send it's exit status to kernel either when it needs to call pthread_exit() with non-zero value to indicate some error or from signal handler before pthread_exit(). Anjali Kulkarni (3): connector/cn_proc: Add hash table for threads connector/cn_proc: Kunit tests for threads hash table connector/cn_proc: Selftest for threads drivers/connector/Makefile | 2 +- drivers/connector/cn_hash.c | 240 ++++++++++++++++++ drivers/connector/cn_proc.c | 59 ++++- drivers/connector/connector.c | 96 ++++++- include/linux/connector.h | 47 ++++ include/linux/sched.h | 2 +- include/uapi/linux/cn_proc.h | 4 +- lib/Kconfig.debug | 17 ++ lib/Makefile | 1 + lib/cn_hash_test.c | 167 ++++++++++++ lib/cn_hash_test.h | 12 + tools/testing/selftests/connector/Makefile | 23 +- .../testing/selftests/connector/proc_filter.c | 5 + tools/testing/selftests/connector/thread.c | 90 +++++++ .../selftests/connector/thread_filter.c | 93 +++++++ 15 files changed, 848 insertions(+), 10 deletions(-) create mode 100644 drivers/connector/cn_hash.c create mode 100644 lib/cn_hash_test.c create mode 100644 lib/cn_hash_test.h create mode 100644 tools/testing/selftests/connector/thread.c create mode 100644 tools/testing/selftests/connector/thread_filter.c -- 2.46.0

8 months, 3 weeks

2
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[PATCH kdevops] defconfig: add linux-modules-kpd defconfig symlink

by Luis Chamberlain

We have now two kdevops proof of concepts with kernel-patches-daemon [0], one for Linux kernel modules testing [1] and the other with radix tree testing (xarray, maple tree) [2]. These trees just contain the required .github/workflows/* files used to trigger a github self-hosted runner to run kdevops since evaluation shows that using github hosted runners will just not work or scale for Linux kernel testing [3]. The way this works with KPD is that KPD has an app in the linux-kdevops organization which is in charge of taking patch series posted to your respective subsystem patchwork (you can have dedicated filters on a mailing list for only specific files if you don't have a dedicated mailing list), it creates a git tree branch using your configured KPD main development tree source, and pushes it out to a respective test tree under github for for you. For example, in the case of development for Linux modules it pushes out a branch with a delta onto the linux-modules-kpd tree [4] and in it, it will also merge the latest kdevops-ci-modules [1] work, which is where the github runner work gets developed. For the radix tree we currently do not yet have a patchwork instance defined but we *could*, and the way it would work is that KPD would push out a branch into the linux-radix-tree-kpd [5] tree with the github actions defined in its respective kdevops-ci-radix-tree [3] tree. What these PoC shows is that the way kdevops has designed testing selftests is that we actually only need to differ in *one* single line of code on the github actions runner to test either of these two Linux kernel subsystems: the defconfig used. To be able to *share* the *same* Linux kernel github actions runner code development between the Linux kernel module tests and the radix tree, all we need to do then is use the git tree onto which a delta was pushed onto as the source for the defconfig. So all we have to do now is just add a symlink of the respective development test tree onto its corresponding defconfig. Add the respective defconfig then for linux-modules-kpd by symlinking it to the seltests-kmod-cli defconfig. This will let us later share *one* github development action runner code for self-hosted runners for *all* Linux kernel sefltests we define in *one* development tree which KPD could leverage. Now that we have locked down the linux-kdevops github organization to only allow respective developers to be able to trigger pushes or PRs, this also allows us to add dedicated self-hosted runners per target test development repository so we can scale our testing as we need with security in mind. The only thing left to do here now, is to evaluate if we want an allow check for who's patches we want to enable automatic testing for through KPD. [0] https://github.com/facebookincubator/kernel-patches-daemon [1] https://github.com/linux-kdevops/kdevops-ci-modules [2] https://github.com/linux-kdevops/kdevops-ci-radix-tree [3] https://lore.kernel.org/kdevops/CAB=NE6VKWSkv1JZ_Z2LKq4o7+JBkKc6u8Wa1zxxBnG… [4] https://github.com/linux-kdevops/linux-modules-kpd [5] https://github.com/linux-kdevops/linux-radix-tree-kpd Signed-off-by: Luis Chamberlain <mcgrof(a)kernel.org> --- defconfigs/linux-modules-kpd | 1 + 1 file changed, 1 insertion(+) create mode 120000 defconfigs/linux-modules-kpd diff --git a/defconfigs/linux-modules-kpd b/defconfigs/linux-modules-kpd new file mode 120000 index 000000000000..e61fd7f687b0 --- /dev/null +++ b/defconfigs/linux-modules-kpd @@ -0,0 +1 @@ +seltests-kmod-cli \ No newline at end of file -- 2.43.0

8 months, 3 weeks

1
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[PATCH net-next v21 11/14] mm: page_frag: add testing for the newly added prepare API

by Yunsheng Lin

Add testing for the newly added prepare API, for both aligned and non-aligned API, also probe API is also tested along with prepare API. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- .../selftests/mm/page_frag/page_frag_test.c | 76 +++++++++++++++++-- tools/testing/selftests/mm/run_vmtests.sh | 4 + tools/testing/selftests/mm/test_page_frag.sh | 27 +++++++ 3 files changed, 102 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index e806c1866e36..1e47e9ad66f0 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -32,6 +32,10 @@ static bool test_align; module_param(test_align, bool, 0); MODULE_PARM_DESC(test_align, "use align API for testing"); +static bool test_prepare; +module_param(test_prepare, bool, 0); +MODULE_PARM_DESC(test_prepare, "use prepare API for testing"); + static int test_alloc_len = 2048; module_param(test_alloc_len, int, 0); MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); @@ -74,6 +78,21 @@ static int page_frag_pop_thread(void *arg) return 0; } +static void frag_frag_test_commit(struct page_frag_cache *nc, + struct page_frag *prepare_pfrag, + struct page_frag *probe_pfrag, + unsigned int used_sz) +{ + if (prepare_pfrag->page != probe_pfrag->page || + prepare_pfrag->offset != probe_pfrag->offset || + prepare_pfrag->size != probe_pfrag->size) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong probed info\n"); + } + + page_frag_commit(nc, prepare_pfrag, used_sz); +} + static int page_frag_push_thread(void *arg) { struct ptr_ring *ring = arg; @@ -86,15 +105,61 @@ static int page_frag_push_thread(void *arg) int ret; if (test_align) { - va = page_frag_alloc_align(&test_nc, test_alloc_len, - GFP_KERNEL, SMP_CACHE_BYTES); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare_align(&test_nc, + test_alloc_len, + &prepare_frag, + GFP_KERNEL, + SMP_CACHE_BYTES); + + probe_va = __page_frag_alloc_refill_probe_align(&test_nc, + test_alloc_len, + &probe_frag, + -SMP_CACHE_BYTES); + if (va != probe_va) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong va\n"); + } + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc_align(&test_nc, + test_alloc_len, + GFP_KERNEL, + SMP_CACHE_BYTES); + } if ((unsigned long)va & (SMP_CACHE_BYTES - 1)) { force_exit = true; WARN_ONCE(true, TEST_FAILED_PREFIX "unaligned va returned\n"); } } else { - va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare(&test_nc, test_alloc_len, + &prepare_frag, GFP_KERNEL); + + probe_va = page_frag_alloc_refill_probe(&test_nc, test_alloc_len, + &probe_frag); + + if (va != probe_va) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong va\n"); + } + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } } if (!va) @@ -176,8 +241,9 @@ static int __init page_frag_test_init(void) } duration = (u64)ktime_us_delta(ktime_get(), start); - pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, - test_align ? "aligned" : "non-aligned", duration); + pr_info("%d of iterations for %s %s API testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", + test_prepare ? "prepare" : "alloc", duration); out: ptr_ring_cleanup(&ptr_ring, NULL); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 2c5394584af4..f6ff9080a6f2 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -464,6 +464,10 @@ CATEGORY="page_frag" run_test ./test_page_frag.sh aligned CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned_prepare + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned_prepare + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh index f55b105084cf..1c757fd11844 100755 --- a/tools/testing/selftests/mm/test_page_frag.sh +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -43,6 +43,8 @@ check_test_failed_prefix() { SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" +NONALIGNED_PREPARE_PARAM="$NONALIGNED_PARAM test_prepare=1" +ALIGNED_PREPARE_PARAM="$ALIGNED_PARAM test_prepare=1" check_test_requirements() { @@ -77,6 +79,20 @@ run_aligned_check() insmod $DRIVER $ALIGNED_PARAM > /dev/null 2>&1 } +run_nonaligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast nonaligned prepare API is." + + insmod $DRIVER $NONALIGNED_PREPARE_PARAM > /dev/null 2>&1 +} + +run_aligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast aligned prepare API is." + + insmod $DRIVER $ALIGNED_PREPARE_PARAM > /dev/null 2>&1 +} + run_smoke_check() { echo "Run smoke test." @@ -87,6 +103,7 @@ run_smoke_check() usage() { echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "[ aligned_prepare ] | [ nonaligned_prepare ] | " echo "manual parameters" echo echo "Valid tests and parameters:" @@ -107,6 +124,12 @@ usage() echo "# Performance testing for aligned alloc API" echo "$0 aligned" echo + echo "# Performance testing for nonaligned prepare API" + echo "$0 nonaligned_prepare" + echo + echo "# Performance testing for aligned prepare API" + echo "$0 aligned_prepare" + echo exit 0 } @@ -158,6 +181,10 @@ function run_test() run_nonaligned_check elif [[ "$1" = "aligned" ]]; then run_aligned_check + elif [[ "$1" = "nonaligned_prepare" ]]; then + run_nonaligned_prepare_check + elif [[ "$1" = "aligned_prepare" ]]; then + run_aligned_prepare_check else run_manual_check $@ fi -- 2.33.0

8 months, 3 weeks

1
0
0 0

[PATCH net-next v21 04/14] mm: page_frag: avoid caller accessing 'page_frag_cache' directly

by Yunsheng Lin

Use appropriate frag_page API instead of caller accessing 'page_frag_cache' directly. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> Acked-by: Chuck Lever <chuck.lever(a)oracle.com> --- drivers/vhost/net.c | 2 +- include/linux/page_frag_cache.h | 10 ++++++++++ net/core/skbuff.c | 6 +++--- net/rxrpc/conn_object.c | 4 +--- net/rxrpc/local_object.c | 4 +--- net/sunrpc/svcsock.c | 6 ++---- tools/testing/selftests/mm/page_frag/page_frag_test.c | 2 +- 7 files changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index f16279351db5..9ad37c012189 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1325,7 +1325,7 @@ static int vhost_net_open(struct inode *inode, struct file *f) vqs[VHOST_NET_VQ_RX]); f->private_data = n; - n->pf_cache.va = NULL; + page_frag_cache_init(&n->pf_cache); return 0; } diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h index 67ac8626ed9b..0a52f7a179c8 100644 --- a/include/linux/page_frag_cache.h +++ b/include/linux/page_frag_cache.h @@ -7,6 +7,16 @@ #include <linux/mm_types_task.h> #include <linux/types.h> +static inline void page_frag_cache_init(struct page_frag_cache *nc) +{ + nc->va = NULL; +} + +static inline bool page_frag_cache_is_pfmemalloc(struct page_frag_cache *nc) +{ + return !!nc->pfmemalloc; +} + void page_frag_cache_drain(struct page_frag_cache *nc); void __page_frag_cache_drain(struct page *page, unsigned int count); void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 00afeb90c23a..6841e61a6bd0 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -753,14 +753,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (in_hardirq() || irqs_disabled()) { nc = this_cpu_ptr(&netdev_alloc_cache); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); } else { local_bh_disable(); local_lock_nested_bh(&napi_alloc_cache.bh_lock); nc = this_cpu_ptr(&napi_alloc_cache.page); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); local_unlock_nested_bh(&napi_alloc_cache.bh_lock); local_bh_enable(); @@ -850,7 +850,7 @@ struct sk_buff *napi_alloc_skb(struct napi_struct *napi, unsigned int len) len = SKB_HEAD_ALIGN(len); data = page_frag_alloc(&nc->page, len, gfp_mask); - pfmemalloc = nc->page.pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(&nc->page); } local_unlock_nested_bh(&napi_alloc_cache.bh_lock); diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 1539d315afe7..694c4df7a1a3 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -337,9 +337,7 @@ static void rxrpc_clean_up_connection(struct work_struct *work) */ rxrpc_purge_queue(&conn->rx_queue); - if (conn->tx_data_alloc.va) - __page_frag_cache_drain(virt_to_page(conn->tx_data_alloc.va), - conn->tx_data_alloc.pagecnt_bias); + page_frag_cache_drain(&conn->tx_data_alloc); call_rcu(&conn->rcu, rxrpc_rcu_free_connection); } diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index f9623ace2201..2792d2304605 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -452,9 +452,7 @@ void rxrpc_destroy_local(struct rxrpc_local *local) #endif rxrpc_purge_queue(&local->rx_queue); rxrpc_purge_client_connections(local); - if (local->tx_alloc.va) - __page_frag_cache_drain(virt_to_page(local->tx_alloc.va), - local->tx_alloc.pagecnt_bias); + page_frag_cache_drain(&local->tx_alloc); } /* diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 825ec5357691..b785425c3315 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1608,7 +1608,6 @@ static void svc_tcp_sock_detach(struct svc_xprt *xprt) static void svc_sock_free(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct page_frag_cache *pfc = &svsk->sk_frag_cache; struct socket *sock = svsk->sk_sock; trace_svcsock_free(svsk, sock); @@ -1618,8 +1617,7 @@ static void svc_sock_free(struct svc_xprt *xprt) sockfd_put(sock); else sock_release(sock); - if (pfc->va) - __page_frag_cache_drain(virt_to_head_page(pfc->va), - pfc->pagecnt_bias); + + page_frag_cache_drain(&svsk->sk_frag_cache); kfree(svsk); } diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 13c44133e009..e806c1866e36 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -126,7 +126,7 @@ static int __init page_frag_test_init(void) u64 duration; int ret; - test_nc.va = NULL; + page_frag_cache_init(&test_nc); atomic_set(&nthreads, 2); init_completion(&wait); -- 2.33.0

8 months, 3 weeks

1
0
0 0

[PATCH net-next v21 02/14] mm: move the page fragment allocator from page_alloc into its own file

by Yunsheng Lin

Inspired by [1], move the page fragment allocator from page_alloc into its own c file and header file, as we are about to make more change for it to replace another page_frag implementation in sock.c As this patchset is going to replace 'struct page_frag' with 'struct page_frag_cache' in sched.h, including page_frag_cache.h in sched.h has a compiler error caused by interdependence between mm_types.h and mm.h for asm-offsets.c, see [2]. So avoid the compiler error by moving 'struct page_frag_cache' to mm_types_task.h as suggested by Alexander, see [3]. 1. https://lore.kernel.org/all/20230411160902.4134381-3-dhowells@redhat.com/ 2. https://lore.kernel.org/all/15623dac-9358-4597-b3ee-3694a5956920@gmail.com/ 3. https://lore.kernel.org/all/CAKgT0UdH1yD=LSCXFJ=YM_aiA4OomD-2wXykO42bizaWMt… CC: David Howells <dhowells(a)redhat.com> CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Acked-by: Andrew Morton <akpm(a)linux-foundation.org> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- include/linux/gfp.h | 22 --- include/linux/mm_types.h | 18 --- include/linux/mm_types_task.h | 18 +++ include/linux/page_frag_cache.h | 31 ++++ include/linux/skbuff.h | 1 + mm/Makefile | 1 + mm/page_alloc.c | 136 ---------------- mm/page_frag_cache.c | 145 ++++++++++++++++++ .../selftests/mm/page_frag/page_frag_test.c | 2 +- 9 files changed, 197 insertions(+), 177 deletions(-) create mode 100644 include/linux/page_frag_cache.h create mode 100644 mm/page_frag_cache.c diff --git a/include/linux/gfp.h b/include/linux/gfp.h index a951de920e20..a0a6d25f883f 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -371,28 +371,6 @@ __meminit void *alloc_pages_exact_nid_noprof(int nid, size_t size, gfp_t gfp_mas extern void __free_pages(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order); -struct page_frag_cache; -void page_frag_cache_drain(struct page_frag_cache *nc); -extern void __page_frag_cache_drain(struct page *page, unsigned int count); -void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, - gfp_t gfp_mask, unsigned int align_mask); - -static inline void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align) -{ - WARN_ON_ONCE(!is_power_of_2(align)); - return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); -} - -static inline void *page_frag_alloc(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask) -{ - return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); -} - -extern void page_frag_free(void *addr); - #define __free_page(page) __free_pages((page), 0) #define free_page(addr) free_pages((addr), 0) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 6e3bdf8e38bc..92314ef2d978 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -521,9 +521,6 @@ static_assert(sizeof(struct ptdesc) <= sizeof(struct page)); */ #define STRUCT_PAGE_MAX_SHIFT (order_base_2(sizeof(struct page))) -#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) -#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) - /* * page_private can be used on tail pages. However, PagePrivate is only * checked by the VM on the head page. So page_private on the tail pages @@ -542,21 +539,6 @@ static inline void *folio_get_private(struct folio *folio) return folio->private; } -struct page_frag_cache { - void * va; -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - __u16 offset; - __u16 size; -#else - __u32 offset; -#endif - /* we maintain a pagecount bias, so that we dont dirty cache line - * containing page->_refcount every time we allocate a fragment. - */ - unsigned int pagecnt_bias; - bool pfmemalloc; -}; - typedef unsigned long vm_flags_t; /* diff --git a/include/linux/mm_types_task.h b/include/linux/mm_types_task.h index bff5706b76e1..0ac6daebdd5c 100644 --- a/include/linux/mm_types_task.h +++ b/include/linux/mm_types_task.h @@ -8,6 +8,7 @@ * (These are defined separately to decouple sched.h from mm_types.h as much as possible.) */ +#include <linux/align.h> #include <linux/types.h> #include <asm/page.h> @@ -43,6 +44,23 @@ struct page_frag { #endif }; +#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) +#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) +struct page_frag_cache { + void *va; +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + __u16 offset; + __u16 size; +#else + __u32 offset; +#endif + /* we maintain a pagecount bias, so that we dont dirty cache line + * containing page->_refcount every time we allocate a fragment. + */ + unsigned int pagecnt_bias; + bool pfmemalloc; +}; + /* Track pages that require TLB flushes */ struct tlbflush_unmap_batch { #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h new file mode 100644 index 000000000000..67ac8626ed9b --- /dev/null +++ b/include/linux/page_frag_cache.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_PAGE_FRAG_CACHE_H +#define _LINUX_PAGE_FRAG_CACHE_H + +#include <linux/log2.h> +#include <linux/mm_types_task.h> +#include <linux/types.h> + +void page_frag_cache_drain(struct page_frag_cache *nc); +void __page_frag_cache_drain(struct page *page, unsigned int count); +void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, + gfp_t gfp_mask, unsigned int align_mask); + +static inline void *page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align) +{ + WARN_ON_ONCE(!is_power_of_2(align)); + return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); +} + +static inline void *page_frag_alloc(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask) +{ + return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); +} + +void page_frag_free(void *addr); + +#endif diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 39f1d16f3628..560e2b49f98b 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -31,6 +31,7 @@ #include <linux/in6.h> #include <linux/if_packet.h> #include <linux/llist.h> +#include <linux/page_frag_cache.h> #include <net/flow.h> #if IS_ENABLED(CONFIG_NF_CONNTRACK) #include <linux/netfilter/nf_conntrack_common.h> diff --git a/mm/Makefile b/mm/Makefile index d5639b036166..dba52bb0da8a 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -65,6 +65,7 @@ page-alloc-$(CONFIG_SHUFFLE_PAGE_ALLOCATOR) += shuffle.o memory-hotplug-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o obj-y += page-alloc.o +obj-y += page_frag_cache.o obj-y += init-mm.o obj-y += memblock.o obj-y += $(memory-hotplug-y) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8afab64814dc..6ca2abce857b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4836,142 +4836,6 @@ void free_pages(unsigned long addr, unsigned int order) EXPORT_SYMBOL(free_pages); -/* - * Page Fragment: - * An arbitrary-length arbitrary-offset area of memory which resides - * within a 0 or higher order page. Multiple fragments within that page - * are individually refcounted, in the page's reference counter. - * - * The page_frag functions below provide a simple allocation framework for - * page fragments. This is used by the network stack and network device - * drivers to provide a backing region of memory for use as either an - * sk_buff->head, or to be used in the "frags" portion of skb_shared_info. - */ -static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, - gfp_t gfp_mask) -{ - struct page *page = NULL; - gfp_t gfp = gfp_mask; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | - __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; - page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, - PAGE_FRAG_CACHE_MAX_ORDER); - nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; -#endif - if (unlikely(!page)) - page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); - - nc->va = page ? page_address(page) : NULL; - - return page; -} - -void page_frag_cache_drain(struct page_frag_cache *nc) -{ - if (!nc->va) - return; - - __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); - nc->va = NULL; -} -EXPORT_SYMBOL(page_frag_cache_drain); - -void __page_frag_cache_drain(struct page *page, unsigned int count) -{ - VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); - - if (page_ref_sub_and_test(page, count)) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(__page_frag_cache_drain); - -void *__page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask) -{ - unsigned int size = PAGE_SIZE; - struct page *page; - int offset; - - if (unlikely(!nc->va)) { -refill: - page = __page_frag_cache_refill(nc, gfp_mask); - if (!page) - return NULL; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* Even if we own the page, we do not use atomic_set(). - * This would break get_page_unless_zero() users. - */ - page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); - - /* reset page count bias and offset to start of new frag */ - nc->pfmemalloc = page_is_pfmemalloc(page); - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - nc->offset = size; - } - - offset = nc->offset - fragsz; - if (unlikely(offset < 0)) { - page = virt_to_page(nc->va); - - if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) - goto refill; - - if (unlikely(nc->pfmemalloc)) { - free_unref_page(page, compound_order(page)); - goto refill; - } - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* OK, page count is 0, we can safely set it */ - set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); - - /* reset page count bias and offset to start of new frag */ - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - offset = size - fragsz; - if (unlikely(offset < 0)) { - /* - * The caller is trying to allocate a fragment - * with fragsz > PAGE_SIZE but the cache isn't big - * enough to satisfy the request, this may - * happen in low memory conditions. - * We don't release the cache page because - * it could make memory pressure worse - * so we simply return NULL here. - */ - return NULL; - } - } - - nc->pagecnt_bias--; - offset &= align_mask; - nc->offset = offset; - - return nc->va + offset; -} -EXPORT_SYMBOL(__page_frag_alloc_align); - -/* - * Frees a page fragment allocated out of either a compound or order 0 page. - */ -void page_frag_free(void *addr) -{ - struct page *page = virt_to_head_page(addr); - - if (unlikely(put_page_testzero(page))) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(page_frag_free); - static void *make_alloc_exact(unsigned long addr, unsigned int order, size_t size) { diff --git a/mm/page_frag_cache.c b/mm/page_frag_cache.c new file mode 100644 index 000000000000..609a485cd02a --- /dev/null +++ b/mm/page_frag_cache.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Page fragment allocator + * + * Page Fragment: + * An arbitrary-length arbitrary-offset area of memory which resides within a + * 0 or higher order page. Multiple fragments within that page are + * individually refcounted, in the page's reference counter. + * + * The page_frag functions provide a simple allocation framework for page + * fragments. This is used by the network stack and network device drivers to + * provide a backing region of memory for use as either an sk_buff->head, or to + * be used in the "frags" portion of skb_shared_info. + */ + +#include <linux/export.h> +#include <linux/gfp_types.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/page_frag_cache.h> +#include "internal.h" + +static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, + gfp_t gfp_mask) +{ + struct page *page = NULL; + gfp_t gfp = gfp_mask; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | + __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; + page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, + PAGE_FRAG_CACHE_MAX_ORDER); + nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; +#endif + if (unlikely(!page)) + page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); + + nc->va = page ? page_address(page) : NULL; + + return page; +} + +void page_frag_cache_drain(struct page_frag_cache *nc) +{ + if (!nc->va) + return; + + __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); + nc->va = NULL; +} +EXPORT_SYMBOL(page_frag_cache_drain); + +void __page_frag_cache_drain(struct page *page, unsigned int count) +{ + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + + if (page_ref_sub_and_test(page, count)) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(__page_frag_cache_drain); + +void *__page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask) +{ + unsigned int size = PAGE_SIZE; + struct page *page; + int offset; + + if (unlikely(!nc->va)) { +refill: + page = __page_frag_cache_refill(nc, gfp_mask); + if (!page) + return NULL; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* Even if we own the page, we do not use atomic_set(). + * This would break get_page_unless_zero() users. + */ + page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); + + /* reset page count bias and offset to start of new frag */ + nc->pfmemalloc = page_is_pfmemalloc(page); + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + nc->offset = size; + } + + offset = nc->offset - fragsz; + if (unlikely(offset < 0)) { + page = virt_to_page(nc->va); + + if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) + goto refill; + + if (unlikely(nc->pfmemalloc)) { + free_unref_page(page, compound_order(page)); + goto refill; + } + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* OK, page count is 0, we can safely set it */ + set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); + + /* reset page count bias and offset to start of new frag */ + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + offset = size - fragsz; + if (unlikely(offset < 0)) { + /* + * The caller is trying to allocate a fragment + * with fragsz > PAGE_SIZE but the cache isn't big + * enough to satisfy the request, this may + * happen in low memory conditions. + * We don't release the cache page because + * it could make memory pressure worse + * so we simply return NULL here. + */ + return NULL; + } + } + + nc->pagecnt_bias--; + offset &= align_mask; + nc->offset = offset; + + return nc->va + offset; +} +EXPORT_SYMBOL(__page_frag_alloc_align); + +/* + * Frees a page fragment allocated out of either a compound or order 0 page. + */ +void page_frag_free(void *addr) +{ + struct page *page = virt_to_head_page(addr); + + if (unlikely(put_page_testzero(page))) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(page_frag_free); diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 912d97b99107..13c44133e009 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -6,12 +6,12 @@ * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> */ -#include <linux/mm.h> #include <linux/module.h> #include <linux/cpumask.h> #include <linux/completion.h> #include <linux/ptr_ring.h> #include <linux/kthread.h> +#include <linux/page_frag_cache.h> #define TEST_FAILED_PREFIX "page_frag_test failed: " -- 2.33.0

8 months, 3 weeks

1
0
0 0

[PATCH net-next v21 01/14] mm: page_frag: add a test module for page_frag

by Yunsheng Lin

The testing is done by ensuring that the fragment allocated from a frag_frag_cache instance is pushed into a ptr_ring instance in a kthread binded to a specified cpu, and a kthread binded to a specified cpu will pop the fragment from the ptr_ring and free the fragment. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- tools/testing/selftests/mm/Makefile | 3 + tools/testing/selftests/mm/page_frag/Makefile | 18 ++ .../selftests/mm/page_frag/page_frag_test.c | 198 ++++++++++++++++++ tools/testing/selftests/mm/run_vmtests.sh | 8 + tools/testing/selftests/mm/test_page_frag.sh | 175 ++++++++++++++++ 5 files changed, 402 insertions(+) create mode 100644 tools/testing/selftests/mm/page_frag/Makefile create mode 100644 tools/testing/selftests/mm/page_frag/page_frag_test.c create mode 100755 tools/testing/selftests/mm/test_page_frag.sh diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index 02e1204971b0..acec529baaca 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -36,6 +36,8 @@ MAKEFLAGS += --no-builtin-rules CFLAGS = -Wall -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES) LDLIBS = -lrt -lpthread -lm +TEST_GEN_MODS_DIR := page_frag + TEST_GEN_FILES = cow TEST_GEN_FILES += compaction_test TEST_GEN_FILES += gup_longterm @@ -126,6 +128,7 @@ TEST_FILES += test_hmm.sh TEST_FILES += va_high_addr_switch.sh TEST_FILES += charge_reserved_hugetlb.sh TEST_FILES += hugetlb_reparenting_test.sh +TEST_FILES += test_page_frag.sh # required by charge_reserved_hugetlb.sh TEST_FILES += write_hugetlb_memory.sh diff --git a/tools/testing/selftests/mm/page_frag/Makefile b/tools/testing/selftests/mm/page_frag/Makefile new file mode 100644 index 000000000000..58dda74d50a3 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/Makefile @@ -0,0 +1,18 @@ +PAGE_FRAG_TEST_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST))))) +KDIR ?= $(abspath $(PAGE_FRAG_TEST_DIR)/../../../../..) + +ifeq ($(V),1) +Q = +else +Q = @ +endif + +MODULES = page_frag_test.ko + +obj-m += page_frag_test.o + +all: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) modules + +clean: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) clean diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c new file mode 100644 index 000000000000..912d97b99107 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -0,0 +1,198 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Test module for page_frag cache + * + * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> + */ + +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/cpumask.h> +#include <linux/completion.h> +#include <linux/ptr_ring.h> +#include <linux/kthread.h> + +#define TEST_FAILED_PREFIX "page_frag_test failed: " + +static struct ptr_ring ptr_ring; +static int nr_objs = 512; +static atomic_t nthreads; +static struct completion wait; +static struct page_frag_cache test_nc; +static int test_popped; +static int test_pushed; +static bool force_exit; + +static int nr_test = 2000000; +module_param(nr_test, int, 0); +MODULE_PARM_DESC(nr_test, "number of iterations to test"); + +static bool test_align; +module_param(test_align, bool, 0); +MODULE_PARM_DESC(test_align, "use align API for testing"); + +static int test_alloc_len = 2048; +module_param(test_alloc_len, int, 0); +MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); + +static int test_push_cpu; +module_param(test_push_cpu, int, 0); +MODULE_PARM_DESC(test_push_cpu, "test cpu for pushing fragment"); + +static int test_pop_cpu; +module_param(test_pop_cpu, int, 0); +MODULE_PARM_DESC(test_pop_cpu, "test cpu for popping fragment"); + +static int page_frag_pop_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag pop test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_popped < nr_test) { + void *obj = __ptr_ring_consume(ring); + + if (obj) { + test_popped++; + page_frag_free(obj); + } else { + if (force_exit) + break; + + cond_resched(); + } + } + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + pr_info("page_frag pop test thread exits on cpu %d\n", + smp_processor_id()); + + return 0; +} + +static int page_frag_push_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag push test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_pushed < nr_test && !force_exit) { + void *va; + int ret; + + if (test_align) { + va = page_frag_alloc_align(&test_nc, test_alloc_len, + GFP_KERNEL, SMP_CACHE_BYTES); + + if ((unsigned long)va & (SMP_CACHE_BYTES - 1)) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "unaligned va returned\n"); + } + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } + + if (!va) + continue; + + ret = __ptr_ring_produce(ring, va); + if (ret) { + page_frag_free(va); + cond_resched(); + } else { + test_pushed++; + } + } + + pr_info("page_frag push test thread exits on cpu %d\n", + smp_processor_id()); + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + return 0; +} + +static int __init page_frag_test_init(void) +{ + struct task_struct *tsk_push, *tsk_pop; + int last_pushed = 0, last_popped = 0; + ktime_t start; + u64 duration; + int ret; + + test_nc.va = NULL; + atomic_set(&nthreads, 2); + init_completion(&wait); + + if (test_alloc_len > PAGE_SIZE || test_alloc_len <= 0 || + !cpu_active(test_push_cpu) || !cpu_active(test_pop_cpu)) + return -EINVAL; + + ret = ptr_ring_init(&ptr_ring, nr_objs, GFP_KERNEL); + if (ret) + return ret; + + tsk_push = kthread_create_on_cpu(page_frag_push_thread, &ptr_ring, + test_push_cpu, "page_frag_push"); + if (IS_ERR(tsk_push)) + return PTR_ERR(tsk_push); + + tsk_pop = kthread_create_on_cpu(page_frag_pop_thread, &ptr_ring, + test_pop_cpu, "page_frag_pop"); + if (IS_ERR(tsk_pop)) { + kthread_stop(tsk_push); + return PTR_ERR(tsk_pop); + } + + start = ktime_get(); + wake_up_process(tsk_push); + wake_up_process(tsk_pop); + + pr_info("waiting for test to complete\n"); + + while (!wait_for_completion_timeout(&wait, msecs_to_jiffies(10000))) { + /* exit if there is no progress for push or pop size */ + if (last_pushed == test_pushed || last_popped == test_popped) { + WARN_ONCE(true, TEST_FAILED_PREFIX "no progress\n"); + force_exit = true; + continue; + } + + last_pushed = test_pushed; + last_popped = test_popped; + pr_info("page_frag_test progress: pushed = %d, popped = %d\n", + test_pushed, test_popped); + } + + if (force_exit) { + pr_err(TEST_FAILED_PREFIX "exit with error\n"); + goto out; + } + + duration = (u64)ktime_us_delta(ktime_get(), start); + pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", duration); + +out: + ptr_ring_cleanup(&ptr_ring, NULL); + page_frag_cache_drain(&test_nc); + + return -EAGAIN; +} + +static void __exit page_frag_test_exit(void) +{ +} + +module_init(page_frag_test_init); +module_exit(page_frag_test_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Yunsheng Lin <linyunsheng(a)huawei.com>"); +MODULE_DESCRIPTION("Test module for page_frag"); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index c5797ad1d37b..2c5394584af4 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -75,6 +75,8 @@ separated by spaces: read-only VMAs - mdwe test prctl(PR_SET_MDWE, ...) +- page_frag + test handling of page fragment allocation and freeing example: ./run_vmtests.sh -t "hmm mmap ksm" EOF @@ -456,6 +458,12 @@ CATEGORY="mkdirty" run_test ./mkdirty CATEGORY="mdwe" run_test ./mdwe_test +CATEGORY="page_frag" run_test ./test_page_frag.sh smoke + +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh new file mode 100755 index 000000000000..f55b105084cf --- /dev/null +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -0,0 +1,175 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> +# Copyright (C) 2018 Uladzislau Rezki (Sony) <urezki(a)gmail.com> +# +# This is a test script for the kernel test driver to test the +# correctness and performance of page_frag's implementation. +# Therefore it is just a kernel module loader. You can specify +# and pass different parameters in order to: +# a) analyse performance of page fragment allocations; +# b) stressing and stability check of page_frag subsystem. + +DRIVER="./page_frag/page_frag_test.ko" +CPU_LIST=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) +TEST_CPU_0=$(echo $CPU_LIST | awk '{print $1}') + +if [ $(echo $CPU_LIST | wc -w) -gt 1 ]; then + TEST_CPU_1=$(echo $CPU_LIST | awk '{print $2}') + NR_TEST=100000000 +else + TEST_CPU_1=$TEST_CPU_0 + NR_TEST=1000000 +fi + +# 1 if fails +exitcode=1 + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +check_test_failed_prefix() { + if dmesg | grep -q 'page_frag_test failed:';then + echo "page_frag_test failed, please check dmesg" + exit $exitcode + fi +} + +# +# Static templates for testing of page_frag APIs. +# Also it is possible to pass any supported parameters manually. +# +SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" +NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" +ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" + +check_test_requirements() +{ + uid=$(id -u) + if [ $uid -ne 0 ]; then + echo "$0: Must be run as root" + exit $ksft_skip + fi + + if ! which insmod > /dev/null 2>&1; then + echo "$0: You need insmod installed" + exit $ksft_skip + fi + + if [ ! -f $DRIVER ]; then + echo "$0: You need to compile page_frag_test module" + exit $ksft_skip + fi +} + +run_nonaligned_check() +{ + echo "Run performance tests to evaluate how fast nonaligned alloc API is." + + insmod $DRIVER $NONALIGNED_PARAM > /dev/null 2>&1 +} + +run_aligned_check() +{ + echo "Run performance tests to evaluate how fast aligned alloc API is." + + insmod $DRIVER $ALIGNED_PARAM > /dev/null 2>&1 +} + +run_smoke_check() +{ + echo "Run smoke test." + + insmod $DRIVER $SMOKE_PARAM > /dev/null 2>&1 +} + +usage() +{ + echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "manual parameters" + echo + echo "Valid tests and parameters:" + echo + modinfo $DRIVER + echo + echo "Example usage:" + echo + echo "# Shows help message" + echo "$0" + echo + echo "# Smoke testing" + echo "$0 smoke" + echo + echo "# Performance testing for nonaligned alloc API" + echo "$0 nonaligned" + echo + echo "# Performance testing for aligned alloc API" + echo "$0 aligned" + echo + exit 0 +} + +function validate_passed_args() +{ + VALID_ARGS=`modinfo $DRIVER | awk '/parm:/ {print $2}' | sed 's/:.*//'` + + # + # Something has been passed, check it. + # + for passed_arg in $@; do + key=${passed_arg//=*/} + valid=0 + + for valid_arg in $VALID_ARGS; do + if [[ $key = $valid_arg ]]; then + valid=1 + break + fi + done + + if [[ $valid -ne 1 ]]; then + echo "Error: key is not correct: ${key}" + exit $exitcode + fi + done +} + +function run_manual_check() +{ + # + # Validate passed parameters. If there is wrong one, + # the script exists and does not execute further. + # + validate_passed_args $@ + + echo "Run the test with following parameters: $@" + insmod $DRIVER $@ > /dev/null 2>&1 +} + +function run_test() +{ + if [ $# -eq 0 ]; then + usage + else + if [[ "$1" = "smoke" ]]; then + run_smoke_check + elif [[ "$1" = "nonaligned" ]]; then + run_nonaligned_check + elif [[ "$1" = "aligned" ]]; then + run_aligned_check + else + run_manual_check $@ + fi + fi + + check_test_failed_prefix + + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +check_test_requirements +run_test $@ + +exit 0 -- 2.33.0

8 months, 3 weeks

1
0
0 0

[PATCH v3] lib/crc16_kunit.c: add KUnit tests for crc16

by Vinicius Peixoto

Add Kunit tests for the kernel's implementation of the standard CRC-16 algorithm (<linux/crc16.h>). The test data consists of 100 randomly-generated test cases, validated against a naive CRC-16 implementation. This test follows roughly the same logic as lib/crc32test.c, but without the performance measurements. Signed-off-by: Vinicius Peixoto <vpeixoto(a)lkcamp.dev> Co-developed-by: Enzo Bertoloti <ebertoloti(a)lkcamp.dev> Signed-off-by: Enzo Bertoloti <ebertoloti(a)lkcamp.dev> Co-developed-by: Fabricio Gasperin <fgasperin(a)lkcamp.dev> Signed-off-by: Fabricio Gasperin <fgasperin(a)lkcamp.dev> Suggested-by: David Laight <David.Laight(a)ACULAB.COM> --- This patch was developed during a hackathon organized by LKCAMP [1], with the objective of writing KUnit tests, both to introduce people to the kernel development process and to learn about different subsystems (with the positive side effect of improving the kernel test coverage, of course). We noticed there were tests for CRC32 in lib/crc32test.c and thought it would be nice to have something similar for CRC16, since it seems to be widely used in network drivers (as well as in some ext4 code). We would really appreciate any feedback/suggestions on how to improve this. Thanks! :-) Changes in v2 (suggested by David Laight): - Use the PRNG from include/linux/prandom.h to generate pseudorandom data/test cases instead of having them hardcoded as large static arrays - Add a naive CRC16 implementation used to validate the kernel's implementation (instead of having the test case results be hard-coded) - Link to v1: https://lore.kernel.org/linux-kselftest/20240922232643.535329-1-vpeixoto@lk… Changes in v3: - Fix compilation warnings about function documentation - Link to v2: https://lore.kernel.org/r/20241003-crc16-kunit-v2-1-5fe74b113e1e@lkcamp.dev [1] https://lkcamp.dev/about --- lib/Kconfig.debug | 9 ++++ lib/Makefile | 1 + lib/crc16_kunit.c | 155 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 165 insertions(+) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7315f643817ae1021f1e4b3dd27b424f49e3f761..f9617e3054948ce43090f524dc67650e9549cee8 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2850,6 +2850,15 @@ config USERCOPY_KUNIT_TEST on the copy_to/from_user infrastructure, making sure basic user/kernel boundary testing is working. +config CRC16_KUNIT_TEST + tristate "KUnit tests for CRC16" + depends on KUNIT + default KUNIT_ALL_TESTS + select CRC16 + help + Enable this option to run unit tests for the kernel's CRC16 + implementation (<linux/crc16.h>). + config TEST_UDELAY tristate "udelay test driver" help diff --git a/lib/Makefile b/lib/Makefile index 773adf88af41665b2419202e5427e0513c6becae..1faed6414a85fd366b4966a00e8ba231d7546e14 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -389,6 +389,7 @@ CFLAGS_fortify_kunit.o += $(DISABLE_STRUCTLEAK_PLUGIN) obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o obj-$(CONFIG_USERCOPY_KUNIT_TEST) += usercopy_kunit.o +obj-$(CONFIG_CRC16_KUNIT_TEST) += crc16_kunit.o obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o diff --git a/lib/crc16_kunit.c b/lib/crc16_kunit.c new file mode 100644 index 0000000000000000000000000000000000000000..0918c98a96d26f4e795e3eb92923db7c549ac01f --- /dev/null +++ b/lib/crc16_kunit.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnits tests for CRC16. + * + * Copyright (C) 2024, LKCAMP + * Author: Vinicius Peixoto <vpeixoto(a)lkcamp.dev> + * Author: Fabricio Gasperin <fgasperin(a)lkcamp.dev> + * Author: Enzo Bertoloti <ebertoloti(a)lkcamp.dev> + */ +#include <kunit/test.h> +#include <linux/crc16.h> +#include <linux/prandom.h> + +#define CRC16_KUNIT_DATA_SIZE 4096 +#define CRC16_KUNIT_TEST_SIZE 100 +#define CRC16_KUNIT_SEED 0x12345678 + +/** + * struct crc16_test - CRC16 test data + * @crc: initial input value to CRC16 + * @start: Start index within the data buffer + * @length: Length of the data + */ +static struct crc16_test { + u16 crc; + u16 start; + u16 length; +} tests[CRC16_KUNIT_TEST_SIZE]; + +u8 data[CRC16_KUNIT_DATA_SIZE]; + + +/* Naive implementation of CRC16 for validation purposes */ +static inline u16 _crc16_naive_byte(u16 crc, u8 data) +{ + u8 i = 0; + + crc ^= (u16) data; + for (i = 0; i < 8; i++) { + if (crc & 0x01) + crc = (crc >> 1) ^ 0xa001; + else + crc = crc >> 1; + } + + return crc; +} + + +static inline u16 _crc16_naive(u16 crc, u8 *buffer, size_t len) +{ + while (len--) + crc = _crc16_naive_byte(crc, *buffer++); + return crc; +} + + +/* Small helper for generating pseudorandom 16-bit data */ +static inline u16 _rand16(void) +{ + static u32 rand = CRC16_KUNIT_SEED; + + rand = next_pseudo_random32(rand); + return rand & 0xFFFF; +} + + +static int crc16_init_test_data(struct kunit_suite *suite) +{ + size_t i; + + /* Fill the data buffer with random bytes */ + for (i = 0; i < CRC16_KUNIT_DATA_SIZE; i++) + data[i] = _rand16() & 0xFF; + + /* Generate random test data while ensuring the random + * start + length values won't overflow the 4096-byte + * buffer (0x7FF * 2 = 0xFFE < 0x1000) + */ + for (size_t i = 0; i < CRC16_KUNIT_TEST_SIZE; i++) { + tests[i].crc = _rand16(); + tests[i].start = _rand16() & 0x7FF; + tests[i].length = _rand16() & 0x7FF; + } + + return 0; +} + +static void crc16_test_empty(struct kunit *test) +{ + u16 crc; + + /* The result for empty data should be the same as the + * initial crc + */ + crc = crc16(0x00, data, 0); + KUNIT_EXPECT_EQ(test, crc, 0); + crc = crc16(0xFF, data, 0); + KUNIT_EXPECT_EQ(test, crc, 0xFF); +} + +static void crc16_test_correctness(struct kunit *test) +{ + size_t i; + u16 crc, crc_naive; + + for (i = 0; i < CRC16_KUNIT_TEST_SIZE; i++) { + /* Compare results with the naive crc16 implementation */ + crc = crc16(tests[i].crc, data + tests[i].start, + tests[i].length); + crc_naive = _crc16_naive(tests[i].crc, data + tests[i].start, + tests[i].length); + KUNIT_EXPECT_EQ(test, crc, crc_naive); + } +} + + +static void crc16_test_combine(struct kunit *test) +{ + size_t i, j; + u16 crc, crc_naive; + + /* Make sure that combining two consecutive crc16 calculations + * yields the same result as calculating the crc16 for the whole thing + */ + for (i = 0; i < CRC16_KUNIT_TEST_SIZE; i++) { + crc_naive = crc16(tests[i].crc, data + tests[i].start, tests[i].length); + for (j = 0; j < tests[i].length; j++) { + crc = crc16(tests[i].crc, data + tests[i].start, j); + crc = crc16(crc, data + tests[i].start + j, tests[i].length - j); + KUNIT_EXPECT_EQ(test, crc, crc_naive); + } + } +} + + +static struct kunit_case crc16_test_cases[] = { + KUNIT_CASE(crc16_test_empty), + KUNIT_CASE(crc16_test_combine), + KUNIT_CASE(crc16_test_correctness), + {}, +}; + +static struct kunit_suite crc16_test_suite = { + .name = "crc16", + .test_cases = crc16_test_cases, + .suite_init = crc16_init_test_data, +}; +kunit_test_suite(crc16_test_suite); + +MODULE_AUTHOR("Fabricio Gasperin <fgasperin(a)lkcamp.dev>"); +MODULE_AUTHOR("Vinicius Peixoto <vpeixoto(a)lkcamp.dev>"); +MODULE_AUTHOR("Enzo Bertoloti <ebertoloti(a)lkcamp.dev>"); +MODULE_DESCRIPTION("Unit tests for crc16"); +MODULE_LICENSE("GPL"); --- base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc change-id: 20241003-crc16-kunit-127a4dc2b72c Best regards, -- Vinicius Peixoto <vpeixoto(a)lkcamp.dev>

8 months, 3 weeks

1
0
0 0

[PATCH v4 00/10] iommufd support pasid attach/replace

by Yi Liu

PASID (Process Address Space ID) is a PCIe extension to tag the DMA transactions out of a physical device, and most modern IOMMU hardware have supported PASID granular address translation. So a PASID-capable device can be attached to multiple hwpts (a.k.a. domains), and each attachment is tagged with a pasid. This series is based on the preparation series [1] [2], it first adds a missing iommu API to replace the domain for a pasid. Based on the iommu pasid attach/ replace/detach APIs, this series adds iommufd APIs for device drivers to attach/replace/detach pasid to/from hwpt per userspace's request, and adds selftest to validate the iommufd APIs. While this series has a missing part which is to enforce the domain allocation with special flag if it will be used by PASID [3]. This is due to special requirements by AMD. Since it is still in mailing discussion [4], so let's mark it here. Once it's finalized, this series needs to enforce the domain flag check to ensure the AMD pasid support is not broken from day-1. The completed code can be found in the below link [5]. Heads up! The existing iommufd selftest was broken, there was a fix [6] to it, but not been upstreamed yet. If want to run the iommufd selftest, please apply that fix. Sorry for the inconvenience. [1] https://lore.kernel.org/linux-iommu/20240912130427.10119-1-yi.l.liu@intel.c… [2] https://lore.kernel.org/linux-iommu/20240912130653.11028-1-yi.l.liu@intel.c… [3] https://lore.kernel.org/linux-iommu/20240822124433.GD3468552@ziepe.ca/ [4] https://lore.kernel.org/linux-iommu/20240911101911.6269-3-vasant.hegde@amd.… [5] https://github.com/yiliu1765/iommufd/tree/iommufd_pasid [6] https://lore.kernel.org/linux-iommu/20240111073213.180020-1-baolu.lu@linux.… Change log: v4: - Replace remove_dev_pasid() by supporting set_dev_pasid() for blocking domain (Kevin) - This is done by the preparation series "Support attaching PASID to the blocked_domain" - Misc tweaks to foil the merging of the iommufd iopf series. Three new patches are added: - iommufd: Always pass iommu_attach_handle to iommu core - iommufd: Move the iommufd_handle helpers to iommufd_private.h - iommufd: Refactor __fault_domain_replace_dev() to be a wrapper of iommu_replace_group_handle() - Renmae patch 03 of v3 to be "iommufd: Support pasid attach/replace" - Add test case for attaching/replacing iopf-capable hwpt to pasid v3: https://lore.kernel.org/kvm/20240628090557.50898-1-yi.l.liu@intel.com/ - Split the set_dev_pasid op enhancements for domain replacement to be a separate series "Make set_dev_pasid op supportting domain replacement" [1]. The below changes are made in the separate series. *) set_dev_pasid() callback should keep the old config if failed to attach to a domain. This simplifies the caller a lot as caller does not need to attach it back to old domain explicitly. This also avoids some corner cases in which the core may do duplicated domain attachment as described in below link (Jason) https://lore.kernel.org/linux-iommu/BN9PR11MB52768C98314A95AFCD2FA6478C0F2@… *) Drop patch 10 of v2 as it's a bug fix and can be submitted separately (Kevin) *) Rebase on top of Baolu's domain_alloc_paging refactor series (Jason) - Drop the attach_data which includes attach_fn and pasid, insteadly passing the pasid through the device attach path. (Jason) - Add a pasid-num-bits property to mock dev to make pasid selftest work (Kevin) v2: https://lore.kernel.org/linux-iommu/20240412081516.31168-1-yi.l.liu@intel.c… - Domain replace for pasid should be handled in set_dev_pasid() callbacks instead of remove_dev_pasid and call set_dev_pasid afteward in iommu layer (Jason) - Make xarray operations more self-contained in iommufd pasid attach/replace/detach (Jason) - Tweak the dev_iommu_get_max_pasids() to allow iommu driver to populate the max_pasids. This makes the iommufd selftest simpler to meet the max_pasids check in iommu_attach_device_pasid() (Jason) v1: https://lore.kernel.org/kvm/20231127063428.127436-1-yi.l.liu@intel.com/#r - Implemnet iommu_replace_device_pasid() to fall back to the original domain if this replacement failed (Kevin) - Add check in do_attach() to check corressponding attach_fn per the pasid value. rfc: https://lore.kernel.org/linux-iommu/20230926092651.17041-1-yi.l.liu@intel.c… Regards, Yi Liu Yi Liu (10): iommu: Introduce a replace API for device pasid iommufd: Refactor __fault_domain_replace_dev() to be a wrapper of iommu_replace_group_handle() iommufd: Move the iommufd_handle helpers to iommufd_private.h iommufd: Always pass iommu_attach_handle to iommu core iommufd: Pass pasid through the device attach/replace path iommufd: Support pasid attach/replace iommufd/selftest: Add set_dev_pasid and remove_dev_pasid in mock iommu iommufd/selftest: Add a helper to get test device iommufd/selftest: Add test ops to test pasid attach/detach iommufd/selftest: Add coverage for iommufd pasid attach/detach drivers/iommu/iommu-priv.h | 4 + drivers/iommu/iommu.c | 90 +++++- drivers/iommu/iommufd/Makefile | 1 + drivers/iommu/iommufd/device.c | 46 ++-- drivers/iommu/iommufd/fault.c | 90 ++---- drivers/iommu/iommufd/hw_pagetable.c | 5 +- drivers/iommu/iommufd/iommufd_private.h | 129 ++++++++- drivers/iommu/iommufd/iommufd_test.h | 30 ++ drivers/iommu/iommufd/pasid.c | 157 +++++++++++ drivers/iommu/iommufd/selftest.c | 208 +++++++++++++- include/linux/iommufd.h | 7 + tools/testing/selftests/iommu/iommufd.c | 256 ++++++++++++++++++ .../selftests/iommu/iommufd_fail_nth.c | 29 +- tools/testing/selftests/iommu/iommufd_utils.h | 78 ++++++ 14 files changed, 1005 insertions(+), 125 deletions(-) create mode 100644 drivers/iommu/iommufd/pasid.c -- 2.34.1

8 months, 3 weeks

3
20
0 0

[GIT PULL] Kselftest fixes update for Linux 6.12-rc3

by Shuah Khan

Hi Linus, Please pull this kselftest fixes update for Linux 6.12-rc3. This kselftest update for Linux 6.12-rc3 consists of several fixes for build, run-time errors, and reporting errors: -- ftrace: regression test for a kernel crash when running function graph tracing and then enabling function profiler. -- rseq: fix for mm_cid test failure. -- vDSO: - fixes to reporting skip and other error conditions. - changes to unconditionally build chacha and getrandom tests on all architectures to make it easier for them to run in CIs. - build error when sched.h to bring in CLONE_NEWTIME define. diff is attached. Note: Had to fix a commit message last minute on rseq patch right before generating the pull request. The last 2 patches have been in my tree longer than just a few hours. :) thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit c66be905cda24fb782b91053b196bd2e966f95b7: selftests: breakpoints: use remaining time to check if suspend succeed (2024-10-02 14:37:30 -0600) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux_kselftest-fixes-6.12-rc3 for you to fetch changes up to 4ee5ca9a29384fcf3f18232fdf8474166dea8dca: ftrace/selftest: Test combination of function_graph tracer and function profiler (2024-10-11 15:05:16 -0600) ---------------------------------------------------------------- linux_kselftest-fixes-6.12-rc3 This kselftest update for Linux 6.12-rc3 consists of several fixes for build, run-time errors, and reporting errors: -- ftrace: regression test for a kernel crash when running function graph tracing and then enabling function profiler. -- rseq: fix for mm_cid test failure. -- vDSO: - fixes to reporting skip and other error conditions. - changes unconditionally build chacha and getrandom tests on all architectures to make it easier for them to run in CIs. - build error when sched.h to bring in CLONE_NEWTIME define. ---------------------------------------------------------------- Jason A. Donenfeld (3): selftests: vDSO: unconditionally build chacha test selftests: vDSO: unconditionally build getrandom test selftests: vDSO: improve getrandom and chacha error messages Mathieu Desnoyers (1): selftests/rseq: Fix mm_cid test failure Steven Rostedt (1): ftrace/selftest: Test combination of function_graph tracer and function profiler Yu Liao (1): selftests: vDSO: Explicitly include sched.h tools/arch/arm64/vdso | 1 - tools/arch/loongarch/vdso | 1 - tools/arch/powerpc/vdso | 1 - tools/arch/s390/vdso | 1 - tools/arch/x86/vdso | 1 - .../ftrace/test.d/ftrace/fgraph-profiler.tc | 31 ++++++ tools/testing/selftests/rseq/rseq.c | 110 ++++++++++++++------- tools/testing/selftests/rseq/rseq.h | 10 +- tools/testing/selftests/vDSO/Makefile | 6 +- tools/testing/selftests/vDSO/vdso_test_chacha.c | 36 ++++--- tools/testing/selftests/vDSO/vdso_test_getrandom.c | 76 +++++++------- tools/testing/selftests/vDSO/vgetrandom-chacha.S | 18 ++++ 12 files changed, 183 insertions(+), 109 deletions(-) delete mode 120000 tools/arch/arm64/vdso delete mode 120000 tools/arch/loongarch/vdso delete mode 120000 tools/arch/powerpc/vdso delete mode 120000 tools/arch/s390/vdso delete mode 120000 tools/arch/x86/vdso create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/fgraph-profiler.tc create mode 100644 tools/testing/selftests/vDSO/vgetrandom-chacha.S ----------------------------------------------------------------

8 months, 3 weeks

2
1
0 0

[PATCH v2] selftests: net/rds: add module not found

by Alessandro Zanni

This fix solves this error, when calling kselftest with targets "net/rds": The error was found by running tests manually with the command: make kselftest TARGETS="net/rds" The patch also specifies to import ip() function from the utils module. Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- Notes: v2: modified the way the parent path is added added test to reproduce the error tools/testing/selftests/net/rds/test.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/rds/test.py b/tools/testing/selftests/net/rds/test.py index e6bb109bcead..4a7178d11193 100755 --- a/tools/testing/selftests/net/rds/test.py +++ b/tools/testing/selftests/net/rds/test.py @@ -14,8 +14,11 @@ import sys import atexit from pwd import getpwuid from os import stat -from lib.py import ip +# Allow utils module to be imported from different directory +this_dir = os.path.dirname(os.path.realpath(__file__)) +sys.path.append(os.path.join(this_dir, "../")) +from lib.py.utils import ip libc = ctypes.cdll.LoadLibrary('libc.so.6') setns = libc.setns -- 2.43.0

8 months, 3 weeks

3
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[PATCH v2] selftests: drivers: net: fix name not defined

by Alessandro Zanni

This fix solves this error, when calling kselftest with targets "drivers/net": File "tools/testing/selftests/net/lib/py/nsim.py", line 64, in __init__ if e.errno == errno.ENOSPC: NameError: name 'errno' is not defined The error was found by running tests manually with the command: make kselftest TARGETS="drivers/net" The module errno makes available standard error system symbols. Reviewed-by: Petr Machata <petrm(a)nvidia.com> Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- Notes: v2: added how to run the test tools/testing/selftests/net/lib/py/nsim.py | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/net/lib/py/nsim.py b/tools/testing/selftests/net/lib/py/nsim.py index f571a8b3139b..1a8cbe9acc48 100644 --- a/tools/testing/selftests/net/lib/py/nsim.py +++ b/tools/testing/selftests/net/lib/py/nsim.py @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 +import errno import json import os import random -- 2.43.0

8 months, 3 weeks

2
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[PATCH v3 0/2] selftests/futex: Create test for robust list

by André Almeida

This patchset creates a selftest for the robust list interface, to track regressions and assure that the interface keeps working as expected. In this version I removed the kselftest_harness include, but I expanded the current futex selftest API a little bit with basic ASSERT_ macros to make the test easier to write and read. In the future, hopefully we can move all futex selftests to the kselftest_harness API anyway. Changes from v2: - Create ASSERT_ macros for futex selftests - Dropped kselftest_harness include, using just futex test API - This is the expected output: TAP version 13 1..6 ok 1 test_robustness ok 2 test_set_robust_list_invalid_size ok 3 test_get_robust_list_self ok 4 test_get_robust_list_child ok 5 test_set_list_op_pending ok 6 test_robust_list_multiple_elements # Totals: pass:6 fail:0 xfail:0 xpass:0 skip:0 error:0 https://lore.kernel.org/lkml/20240903134033.816500-1-andrealmeid@igalia.com André Almeida (2): selftests/futex: Add ASSERT_ macros selftests/futex: Create test for robust list .../selftests/futex/functional/.gitignore | 1 + .../selftests/futex/functional/Makefile | 3 +- .../selftests/futex/functional/robust_list.c | 512 ++++++++++++++++++ .../testing/selftests/futex/include/logging.h | 28 + 4 files changed, 543 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/futex/functional/robust_list.c -- 2.46.0

8 months, 3 weeks

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[PATCH] selftests/ftrace: Fix check of return value in fgraph-retval.tc test

by Steven Rostedt

From: Steven Rostedt <rostedt(a)goodmis.org> The addition of recording both the function name and return address to the function graph tracer updated the selftest to check for "=-5" from "= -5". But this causes the test to fail on certain configs, as "= -5" is still a value that can be returned if function addresses are not enabled (older kernels). Check for both "=-5" and " -5" as a success value. Fixes: 21e92806d39c6 ("function_graph: Support recording and printing the function return address") Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- Shuah, this update is only for changes in my tree, so you do not need to add it. tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc index e8e46378b88d..4307d4eef417 100644 --- a/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc +++ b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-retval.tc @@ -29,7 +29,7 @@ set -e : "Test printing the error code in signed decimal format" echo 0 > options/funcgraph-retval-hex -count=`cat trace | grep 'proc_reg_write' | grep '=-5' | wc -l` +count=`cat trace | grep 'proc_reg_write' | grep -e '=-5 ' -e '= -5 ' | wc -l` if [ $count -eq 0 ]; then fail "Return value can not be printed in signed decimal format" fi -- 2.45.2

8 months, 3 weeks

2
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[PATCH net-next v25 00/13] Device Memory TCP

by Mina Almasry

v25: https://patchwork.kernel.org/project/netdevbpf/list/?series=885396&state=* === Major changes: - Moved devmem.h and mp_dmabuf_devmem.h to internal header files. - Changed the page_pool_params to take in a queue_idx rather than a struct netdev_rx_queue. - Added WARN_ON_ONCE around __skb_checksum readability check and added check to skb_checksum_help(). Other more minor feedback addressed as well. v24: https://patchwork.kernel.org/project/netdevbpf/list/?series=884556&state=* ==== No major changes. Mostly addressing issues in the error paths of dmabuf binding, and code cleanups/improvements from reviewers: Changes: - Fix failing ynl regen error. - Error path fixes & extack error messages in dmabuf binding. - Code cleanup in introspection. - gitignore ynl.d generated file. Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v24/ v23: https://patchwork.kernel.org/project/netdevbpf/list/?series=882978&state=* ==== Fixing relatively minor issues called out in v22. (thanks again!) Mostly code cleanups, extack error messages, and minor reworks. Nothing major really changed, so the exact changes per commit is called in the commit messages. Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v23/ v22: https://patchwork.kernel.org/project/netdevbpf/list/?series=881158&state=* ==== v22 aims to resolve the pending issue pointed to in v21, which is the interaction with xdp. In this series I rebase on top of the minor refactor which refactors propagating xdp configuration to slave devices: https://patchwork.kernel.org/project/netdevbpf/list/?series=881994&state=* I then disable setting xdp on devices using memory providers, and propagating xdp configuration to devices using memory providers. Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v22/ v21: https://patchwork.kernel.org/project/netdevbpf/list/?series=880735&state=* ==== v20 addressed some comments and resolved a test failure, but introduced an unfortunate build error with a config edge case I wasn't testing. v21 simply resolves that error. Major Changes: - Resolve build error with CONFIG_PAGE_POOL=n && CONFIG_NET=y Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v21/ v20: https://patchwork.kernel.org/project/netdevbpf/list/?series=879373&state=* ==== v20 aims to resolve a couple of bug reports against v19, and addresses some review comments around the page_pool_check_memory_provider mechanism. Major changes: - Test edge cases such as header split disabled in selftest. - Change `offset = 0` back to `offset = offset - start` to resolve issue found in RX path by Taehee (thanks!) - Address a few comments around page_pool_check_memory_provider() from Pavel & Jakub. - Removed some unnecessary includes across various patches in the series. - Removed unnecessary EXPORT_SYMBOL(page_pool_mem_providers) (Jakub). - Fix regression caused by incorrect dev_get_max_mp_channel check, along with rename (Jakub). Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v20/ v19: https://patchwork.kernel.org/project/netdevbpf/list/?series=876852&state=* ==== v18 got a thorough review (thanks!), and this iteration addresses the feedback. Major changes: - Prevent deactivating mp bound queues. - Prevent installing xdp on mp bound netdevs, or installing mps on xdp installed netdevs. - Fix corner cases in netlink API vis-a-vis missing attributes. - Iron out the unreadable netmem driver support story. To be honest, the conversation with Jakub & Pavel got a bit confusing for me. I've implemented an approach in this set that makes sense to me, and AFAICT, addresses the requirements. It may be good as-is, or it may be a conversation starter/continuer. To be honest IMO there are many ways to skin this cat and I don't see an extremely strong reason to go for one approach over another. Here is one approach you may like. - Don't reset niov dma_addr on allocation & free. - Add some tests to the selftest that catches some of the issues around missing netlink attributes or deactivating mp-bound queues. Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v19/ v18: https://patchwork.kernel.org/project/netdevbpf/list/?series=874848&state=* ==== v17 got minor feedback: (a) to beef up the description on patch 1 and (b) to remove the leading underscores in the header definition. I applied (a). (b) seems to be against current conventions so I did not apply before further discussion. Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v17/ v17: https://patchwork.kernel.org/project/netdevbpf/list/?series=869900&state=* ==== v16 also got a very thorough review and some testing (thanks again!). Thes version addresses all the concerns reported on v15, in terms of feedback and issues reported. Major changes: - Use ASSERT_RTNL. - Moved around some of the page_pool helpers definitions so I can hide some netmem helpers in private files as Jakub suggested. - Don't make every net_iov hold a ref on the binding as Jakub suggested. - Fix issue reported by Taehee where we access queues after they have been freed. Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v17/ v16: https://patchwork.kernel.org/project/netdevbpf/list/?series=866353&state=* ==== v15 got a thorough review and some testing, and this version addresses almost all the feedback. Some more minor comments where the authors said it could be done later, I left out. Major changes: - Addition of dma-buf introspection to page-pool-get and queue-get. - Fixes to selftests suggested by Taehee. - Fixes to documentation suggested by Donald. - A couple of suggestions and fixes to TCP patches by Eric and David. - Fixes to number assignements suggested by Arnd. - Use rtnl_lock()ing to guard against queue reconfiguration while the page_pool initialization is happening. (Jakub). - Fixes to a few warnings reproduced by Taehee. - Fixes to dma-buf binding suggested by Taehee and Jakub. - Fixes to netlink UAPI suggested by Jakub - Applied a number of Reviewed-bys and Acked-bys (including ones I lost from v13+). Full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v16/ One caveat: Taehee reproduced a KASAN warning and reported it here: https://lore.kernel.org/netdev/CAMArcTUdCxOBYGF3vpbq=eBvqZfnc44KBaQTN7H-wqd… I estimate the issue to be minor and easily fixable: https://lore.kernel.org/netdev/CAHS8izNgaqC--GGE2xd85QB=utUnOHmioCsDd1TNxJW… I hope to be able to follow up with a fix to net tree as net-next closes imminently, but if this iteration doesn't make it in, I will repost with a fix squashed after net-next reopens, no problem. v15: https://patchwork.kernel.org/project/netdevbpf/list/?series=865481&state=* ==== No material changes in this version, only a fix to linking against libynl.a from the last version. Per Jakub's instructions I've pulled one of his patches into this series, and now use the new libynl.a correctly, I hope. As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v15/ v14: https://patchwork.kernel.org/project/netdevbpf/list/?series=865135&archive=… ==== No material changes in this version. Only rebase and re-verification on top of net-next. v13, I think, raced with commit ebad6d0334793 ("net/ipv4: Use nested-BH locking for ipv4_tcp_sk.") being merged to net-next that caused a patchwork failure to apply. This series should apply cleanly on commit c4532232fa2a4 ("selftests: net: remove unneeded IP_GRE config"). I did not wait the customary 24hr as Jakub said it's OK to repost as soon as I build test the rebased version: https://lore.kernel.org/netdev/20240625075926.146d769d@kernel.org/ v13: https://patchwork.kernel.org/project/netdevbpf/list/?series=861406&archive=… ==== Major changes: -------------- This iteration addresses Pavel's review comments, applies his reviewed-by's, and seeks to fix the patchwork build error (sorry!). As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v13/ v12: https://patchwork.kernel.org/project/netdevbpf/list/?series=859747&state=* ==== Major changes: -------------- This iteration only addresses one minor comment from Pavel with regards to the trace printing of netmem, and the patchwork build error introduced in v11 because I missed doing an allmodconfig build, sorry. Other than that v11, AFAICT, received no feedback. There is one discussion about how the specifics of plugging io uring memory through the page pool, but not relevant to content in this particular patchset, AFAICT. As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v12/ v11: https://patchwork.kernel.org/project/netdevbpf/list/?series=857457&state=* ==== Major Changes: -------------- v11 addresses feedback received in v10. The major change is the removal of the memory provider ops as requested by Christoph. We still accomplish the same thing, but utilizing direct function calls with if statements rather than generic ops. Additionally address sparse warnings, bugs and review comments from folks that reviewed. As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v11/ Detailed changelog: ------------------- - Fixes in netdev_rx_queue_restart() from Pavel & David. - Remove commit e650e8c3a36f5 ("net: page_pool: create hooks for custom page providers") from the series to address Christoph's feedback and rebased other patches on the series on this change. - Fixed build errors with CONFIG_DMA_SHARED_BUFFER && !CONFIG_GENERIC_ALLOCATOR build. - Fixed sparse warnings pointed out by Paolo. - Drop unnecessary gro_pull_from_frag0 checks. - Added Bagas reviewed-by to docs. v10: https://patchwork.kernel.org/project/netdevbpf/list/?series=852422&state=* ==== Major Changes: -------------- v9 was sent right before the merge window closed (sorry!). v10 is almost a re-send of the series now that the merge window re-opened. Only rebased to latest net-next and addressed some minor iterative comments received on v9. As usual, the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v10/ Detailed changelog: ------------------- - Fixed tokens leaking in DONTNEED setsockopt (Nikolay). - Moved net_iov_dma_addr() to devmem.c and made it a devmem specific helpers (David). - Rename hook alloc_pages to alloc_netmems as alloc_pages is now preprocessor macro defined and causes a build error. v9: === Major Changes: -------------- GVE queue API has been merged. Submitting this version as non-RFC after rebasing on top of the merged API, and dropped the out of tree queue API I was carrying on github. Addressed the little feedback v8 has received. Detailed changelog: ------------------ - Added new patch from David Wei to this series for netdev_rx_queue_restart() - Fixed sparse error. - Removed CONFIG_ checks in netmem_is_net_iov() - Flipped skb->readable to skb->unreadable - Minor fixes to selftests & docs. RFC v8: ======= Major Changes: -------------- - Fixed build error generated by patch-by-patch build. - Applied docs suggestions from Randy. RFC v7: ======= Major Changes: -------------- This revision largely rebases on top of net-next and addresses the feedback RFCv6 received from folks, namely Jakub, Yunsheng, Arnd, David, & Pavel. The series remains in RFC because the queue-API ndos defined in this series are not yet implemented. I have a GVE implementation I carry out of tree for my testing. A upstreamable GVE implementation is in the works. Aside from that, in my estimation all the patches are ready for review/merge. Please do take a look. As usual the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v7/ Detailed changelog: - Use admin-perm in netlink API. - Addressed feedback from Jakub with regards to netlink API implementation. - Renamed devmem.c functions to something more appropriate for that file. - Improve the performance seen through the page_pool benchmark. - Fix the value definition of all the SO_DEVMEM_* uapi. - Various fixes to documentation. Perf - page-pool benchmark: --------------------------- Improved performance of bench_page_pool_simple.ko tests compared to v6: https://pastebin.com/raw/v5dYRg8L net-next base: 8 cycle fast path. RFC v6: 10 cycle fast path. RFC v7: 9 cycle fast path. RFC v7 with CONFIG_DMA_SHARED_BUFFER disabled: 8 cycle fast path, same as baseline. Perf - Devmem TCP benchmark: --------------------- Perf is about the same regardless of the changes in v7, namely the removal of the static_branch_unlikely to improve the page_pool benchmark performance: 189/200gbps bi-directional throughput with RX devmem TCP and regular TCP TX i.e. ~95% line rate. RFC v6: ======= Major Changes: -------------- This revision largely rebases on top of net-next and addresses the little feedback RFCv5 received. The series remains in RFC because the queue-API ndos defined in this series are not yet implemented. I have a GVE implementation I carry out of tree for my testing. A upstreamable GVE implementation is in the works. Aside from that, in my estimation all the patches are ready for review/merge. Please do take a look. As usual the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v6/ This version also comes with some performance data recorded in the cover letter (see below changelog). Detailed changelog: - Rebased on top of the merged netmem_ref changes. - Converted skb->dmabuf to skb->readable (Pavel). Pavel's original suggestion was to remove the skb->dmabuf flag entirely, but when I looked into it closely, I found the issue that if we remove the flag we have to dereference the shinfo(skb) pointer to obtain the first frag to tell whether an skb is readable or not. This can cause a performance regression if it dirties the cache line when the shinfo(skb) was not really needed. Instead, I converted the skb->dmabuf flag into a generic skb->readable flag which can be re-used by io_uring 0-copy RX. - Squashed a few locking optimizations from Eric Dumazet in the RX path and the DEVMEM_DONTNEED setsockopt. - Expanded the tests a bit. Added validation for invalid scenarios and added some more coverage. Perf - page-pool benchmark: --------------------------- bench_page_pool_simple.ko tests with and without these changes: https://pastebin.com/raw/ncHDwAbn AFAIK the number that really matters in the perf tests is the 'tasklet_page_pool01_fast_path Per elem'. This one measures at about 8 cycles without the changes but there is some 1 cycle noise in some results. With the patches this regresses to 9 cycles with the changes but there is 1 cycle noise occasionally running this test repeatedly. Lastly I tried disable the static_branch_unlikely() in netmem_is_net_iov() check. To my surprise disabling the static_branch_unlikely() check reduces the fast path back to 8 cycles, but the 1 cycle noise remains. Perf - Devmem TCP benchmark: --------------------- 189/200gbps bi-directional throughput with RX devmem TCP and regular TCP TX i.e. ~95% line rate. Major changes in RFC v5: ======================== 1. Rebased on top of 'Abstract page from net stack' series and used the new netmem type to refer to LSB set pointers instead of re-using struct page. 2. Downgraded this series back to RFC and called it RFC v5. This is because this series is now dependent on 'Abstract page from net stack'[1] and the queue API. Both are removed from the series to reduce the patch # and those bits are fairly independent or pre-requisite work. 3. Reworked the page_pool devmem support to use netmem and for some more unified handling. 4. Reworked the reference counting of net_iov (renamed from page_pool_iov) to use pp_ref_count for refcounting. The full changes including the dependent series and GVE page pool support is here: https://github.com/mina/linux/commits/tcpdevmem-rfcv5/ [1] https://patchwork.kernel.org/project/netdevbpf/list/?series=810774 Major changes in v1: ==================== 1. Implemented MVP queue API ndos to remove the userspace-visible driver reset. 2. Fixed issues in the napi_pp_put_page() devmem frag unref path. 3. Removed RFC tag. Many smaller addressed comments across all the patches (patches have individual change log). Full tree including the rest of the GVE driver changes: https://github.com/mina/linux/commits/tcpdevmem-v1 Changes in RFC v3: ================== 1. Pulled in the memory-provider dependency from Jakub's RFC[1] to make the series reviewable and mergeable. 2. Implemented multi-rx-queue binding which was a todo in v2. 3. Fix to cmsg handling. The sticking point in RFC v2[2] was the device reset required to refill the device rx-queues after the dmabuf bind/unbind. The solution suggested as I understand is a subset of the per-queue management ops Jakub suggested or similar: https://lore.kernel.org/netdev/20230815171638.4c057dcd@kernel.org/ This is not addressed in this revision, because: 1. This point was discussed at netconf & netdev and there is openness to using the current approach of requiring a device reset. 2. Implementing individual queue resetting seems to be difficult for my test bed with GVE. My prototype to test this ran into issues with the rx-queues not coming back up properly if reset individually. At the moment I'm unsure if it's a mistake in the POC or a genuine issue in the virtualization stack behind GVE, which currently doesn't test individual rx-queue restart. 3. Our usecases are not bothered by requiring a device reset to refill the buffer queues, and we'd like to support NICs that run into this limitation with resetting individual queues. My thought is that drivers that have trouble with per-queue configs can use the support in this series, while drivers that support new netdev ops to reset individual queues can automatically reset the queue as part of the dma-buf bind/unbind. The same approach with device resets is presented again for consideration with other sticking points addressed. This proposal includes the rx devmem path only proposed for merge. For a snapshot of my entire tree which includes the GVE POC page pool support & device memory support: https://github.com/torvalds/linux/compare/master...mina:linux:tcpdevmem-v3 [1] https://lore.kernel.org/netdev/f8270765-a27b-6ccf-33ea-cda097168d79@redhat.… [2] https://lore.kernel.org/netdev/CAHS8izOVJGJH5WF68OsRWFKJid1_huzzUK+hpKbLcL4… Changes in RFC v2: ================== The sticking point in RFC v1[1] was the dma-buf pages approach we used to deliver the device memory to the TCP stack. RFC v2 is a proof-of-concept that attempts to resolve this by implementing scatterlist support in the networking stack, such that we can import the dma-buf scatterlist directly. This is the approach proposed at a high level here[2]. Detailed changes: 1. Replaced dma-buf pages approach with importing scatterlist into the page pool. 2. Replace the dma-buf pages centric API with a netlink API. 3. Removed the TX path implementation - there is no issue with implementing the TX path with scatterlist approach, but leaving out the TX path makes it easier to review. 4. Functionality is tested with this proposal, but I have not conducted perf testing yet. I'm not sure there are regressions, but I removed perf claims from the cover letter until they can be re-confirmed. 5. Added Signed-off-by: contributors to the implementation. 6. Fixed some bugs with the RX path since RFC v1. Any feedback welcome, but specifically the biggest pending questions needing feedback IMO are: 1. Feedback on the scatterlist-based approach in general. 2. Netlink API (Patch 1 & 2). 3. Approach to handle all the drivers that expect to receive pages from the page pool (Patch 6). [1] https://lore.kernel.org/netdev/dfe4bae7-13a0-3c5d-d671-f61b375cb0b4@gmail.c… [2] https://lore.kernel.org/netdev/CAHS8izPm6XRS54LdCDZVd0C75tA1zHSu6jLVO8nzTLX… ================== * TL;DR: Device memory TCP (devmem TCP) is a proposal for transferring data to and/or from device memory efficiently, without bouncing the data to a host memory buffer. * Problem: A large amount of data transfers have device memory as the source and/or destination. Accelerators drastically increased the volume of such transfers. Some examples include: - ML accelerators transferring large amounts of training data from storage into GPU/TPU memory. In some cases ML training setup time can be as long as 50% of TPU compute time, improving data transfer throughput & efficiency can help improving GPU/TPU utilization. - Distributed training, where ML accelerators, such as GPUs on different hosts, exchange data among them. - Distributed raw block storage applications transfer large amounts of data with remote SSDs, much of this data does not require host processing. Today, the majority of the Device-to-Device data transfers the network are implemented as the following low level operations: Device-to-Host copy, Host-to-Host network transfer, and Host-to-Device copy. The implementation is suboptimal, especially for bulk data transfers, and can put significant strains on system resources, such as host memory bandwidth, PCIe bandwidth, etc. One important reason behind the current state is the kernel’s lack of semantics to express device to network transfers. * Proposal: In this patch series we attempt to optimize this use case by implementing socket APIs that enable the user to: 1. send device memory across the network directly, and 2. receive incoming network packets directly into device memory. Packet _payloads_ go directly from the NIC to device memory for receive and from device memory to NIC for transmit. Packet _headers_ go to/from host memory and are processed by the TCP/IP stack normally. The NIC _must_ support header split to achieve this. Advantages: - Alleviate host memory bandwidth pressure, compared to existing network-transfer + device-copy semantics. - Alleviate PCIe BW pressure, by limiting data transfer to the lowest level of the PCIe tree, compared to traditional path which sends data through the root complex. * Patch overview: ** Part 1: netlink API Gives user ability to bind dma-buf to an RX queue. ** Part 2: scatterlist support Currently the standard for device memory sharing is DMABUF, which doesn't generate struct pages. On the other hand, networking stack (skbs, drivers, and page pool) operate on pages. We have 2 options: 1. Generate struct pages for dmabuf device memory, or, 2. Modify the networking stack to process scatterlist. Approach #1 was attempted in RFC v1. RFC v2 implements approach #2. ** part 3: page pool support We piggy back on page pool memory providers proposal: https://github.com/kuba-moo/linux/tree/pp-providers It allows the page pool to define a memory provider that provides the page allocation and freeing. It helps abstract most of the device memory TCP changes from the driver. ** part 4: support for unreadable skb frags Page pool iovs are not accessible by the host; we implement changes throughput the networking stack to correctly handle skbs with unreadable frags. ** Part 5: recvmsg() APIs We define user APIs for the user to send and receive device memory. Not included with this series is the GVE devmem TCP support, just to simplify the review. Code available here if desired: https://github.com/mina/linux/tree/tcpdevmem This series is built on top of net-next with Jakub's pp-providers changes cherry-picked. * NIC dependencies: 1. (strict) Devmem TCP require the NIC to support header split, i.e. the capability to split incoming packets into a header + payload and to put each into a separate buffer. Devmem TCP works by using device memory for the packet payload, and host memory for the packet headers. 2. (optional) Devmem TCP works better with flow steering support & RSS support, i.e. the NIC's ability to steer flows into certain rx queues. This allows the sysadmin to enable devmem TCP on a subset of the rx queues, and steer devmem TCP traffic onto these queues and non devmem TCP elsewhere. The NIC I have access to with these properties is the GVE with DQO support running in Google Cloud, but any NIC that supports these features would suffice. I may be able to help reviewers bring up devmem TCP on their NICs. * Testing: The series includes a udmabuf kselftest that show a simple use case of devmem TCP and validates the entire data path end to end without a dependency on a specific dmabuf provider. ** Test Setup Kernel: net-next with this series and memory provider API cherry-picked locally. Hardware: Google Cloud A3 VMs. NIC: GVE with header split & RSS & flow steering support. Cc: Pavel Begunkov <asml.silence(a)gmail.com> Cc: David Wei <dw(a)davidwei.uk> Cc: Jason Gunthorpe <jgg(a)ziepe.ca> Cc: Yunsheng Lin <linyunsheng(a)huawei.com> Cc: Shailend Chand <shailend(a)google.com> Cc: Harshitha Ramamurthy <hramamurthy(a)google.com> Cc: Shakeel Butt <shakeel.butt(a)linux.dev> Cc: Jeroen de Borst <jeroendb(a)google.com> Cc: Praveen Kaligineedi <pkaligineedi(a)google.com> Cc: Bagas Sanjaya <bagasdotme(a)gmail.com> Cc: Steven Rostedt <rostedt(a)goodmis.org> Cc: Christoph Hellwig <hch(a)infradead.org> Cc: Nikolay Aleksandrov <razor(a)blackwall.org> Cc: Taehee Yoo <ap420073(a)gmail.com> Cc: Donald Hunter <donald.hunter(a)gmail.com> Mina Almasry (13): netdev: add netdev_rx_queue_restart() net: netdev netlink api to bind dma-buf to a net device netdev: support binding dma-buf to netdevice netdev: netdevice devmem allocator page_pool: devmem support memory-provider: dmabuf devmem memory provider net: support non paged skb frags net: add support for skbs with unreadable frags tcp: RX path for devmem TCP net: add SO_DEVMEM_DONTNEED setsockopt to release RX frags net: add devmem TCP documentation selftests: add ncdevmem, netcat for devmem TCP netdev: add dmabuf introspection Documentation/netlink/specs/netdev.yaml | 61 +++ Documentation/networking/devmem.rst | 269 +++++++++++ Documentation/networking/index.rst | 1 + arch/alpha/include/uapi/asm/socket.h | 6 + arch/mips/include/uapi/asm/socket.h | 6 + arch/parisc/include/uapi/asm/socket.h | 6 + arch/sparc/include/uapi/asm/socket.h | 6 + include/linux/netdevice.h | 2 + include/linux/skbuff.h | 61 ++- include/linux/skbuff_ref.h | 9 +- include/linux/socket.h | 1 + include/net/netdev_rx_queue.h | 5 + include/net/netmem.h | 132 +++++- include/net/page_pool/helpers.h | 39 +- include/net/page_pool/types.h | 23 +- include/net/sock.h | 2 + include/net/tcp.h | 3 +- include/trace/events/page_pool.h | 12 +- include/uapi/asm-generic/socket.h | 6 + include/uapi/linux/netdev.h | 13 + include/uapi/linux/uio.h | 17 + net/Kconfig | 5 + net/core/Makefile | 2 + net/core/datagram.c | 6 + net/core/dev.c | 33 +- net/core/devmem.c | 389 ++++++++++++++++ net/core/devmem.h | 180 ++++++++ net/core/gro.c | 3 +- net/core/mp_dmabuf_devmem.h | 44 ++ net/core/netdev-genl-gen.c | 23 + net/core/netdev-genl-gen.h | 6 + net/core/netdev-genl.c | 139 +++++- net/core/netdev_rx_queue.c | 81 ++++ net/core/netmem_priv.h | 31 ++ net/core/page_pool.c | 120 +++-- net/core/page_pool_priv.h | 46 ++ net/core/page_pool_user.c | 32 +- net/core/skbuff.c | 77 +++- net/core/sock.c | 68 +++ net/ethtool/common.c | 8 + net/ipv4/esp4.c | 3 +- net/ipv4/tcp.c | 263 ++++++++++- net/ipv4/tcp_input.c | 13 +- net/ipv4/tcp_ipv4.c | 16 + net/ipv4/tcp_minisocks.c | 2 + net/ipv4/tcp_output.c | 5 +- net/ipv6/esp6.c | 3 +- net/packet/af_packet.c | 4 +- net/xdp/xsk_buff_pool.c | 5 + tools/include/uapi/linux/netdev.h | 13 + tools/net/ynl/lib/.gitignore | 1 + tools/testing/selftests/net/.gitignore | 1 + tools/testing/selftests/net/Makefile | 9 + tools/testing/selftests/net/ncdevmem.c | 570 ++++++++++++++++++++++++ 54 files changed, 2757 insertions(+), 124 deletions(-) create mode 100644 Documentation/networking/devmem.rst create mode 100644 net/core/devmem.c create mode 100644 net/core/devmem.h create mode 100644 net/core/mp_dmabuf_devmem.h create mode 100644 net/core/netdev_rx_queue.c create mode 100644 net/core/netmem_priv.h create mode 100644 tools/testing/selftests/net/ncdevmem.c -- 2.46.0.469.g59c65b2a67-goog

8 months, 3 weeks

5
27
0 0

[PATCH net-next v02 0/2] net: af_packet: allow joining a fanout when link is down

by Gur Stavi

PACKET socket can retain its fanout membership through link down and up and leave a fanout while closed regardless of link state. However, socket was forbidden from joining a fanout while it was not RUNNING. This patch allows PACKET socket to join a fanout while not RUNNING. Selftest psock_fanout is extended to test this scenario. This is the only test that was performed. This scenario was identified while studying DPDK pmd_af_packet_drv. Since sockets are only created during initialization, there is no reason to fail the initialization if a single link is temporarily down. I hope it is not considered as breaking user space and that applications are not designed to expect this failure. Changes: V02: * psock_fanout: use explicit loopback up/down instead of toggle. * psock_fanout: don't try to restore loopback state on failure. * Rephrase commit message about "leaving a fanout". V01: https://lore.kernel.org/netdev/cover.1728303615.git.gur.stavi@huawei.com/ Gur Stavi (2): af_packet: allow fanout_add when socket is not RUNNING selftests: net/psock_fanout: socket joins fanout when link is down net/packet/af_packet.c | 10 +++--- tools/testing/selftests/net/psock_fanout.c | 42 ++++++++++++++++++++-- 2 files changed, 44 insertions(+), 8 deletions(-) base-commit: f95b4725e796b12e5f347a0d161e1d3843142aa8 -- 2.45.2

8 months, 3 weeks

2
18
0 0

[PATCH net-next 2/2] selftests: drv-net: rss_ctx: add rss ctx busy testcase

by Daniel Zahka

It should be invalid to delete an rss context while it is being referenced from an ntuple filter. ethtool core should prevent this from happening. This patch adds a testcase to verify this behavior. Signed-off-by: Daniel Zahka <daniel.zahka(a)gmail.com> --- .../selftests/drivers/net/hw/rss_ctx.py | 32 +++++++++++++++++-- 1 file changed, 30 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/drivers/net/hw/rss_ctx.py b/tools/testing/selftests/drivers/net/hw/rss_ctx.py index 9d7adb3cf33b..29995586993c 100755 --- a/tools/testing/selftests/drivers/net/hw/rss_ctx.py +++ b/tools/testing/selftests/drivers/net/hw/rss_ctx.py @@ -6,7 +6,7 @@ import random from lib.py import ksft_run, ksft_pr, ksft_exit, ksft_eq, ksft_ne, ksft_ge, ksft_lt from lib.py import NetDrvEpEnv from lib.py import EthtoolFamily, NetdevFamily -from lib.py import KsftSkipEx +from lib.py import KsftSkipEx, KsftFailEx from lib.py import rand_port from lib.py import ethtool, ip, defer, GenerateTraffic, CmdExitFailure @@ -606,6 +606,33 @@ def test_rss_context_overlap2(cfg): test_rss_context_overlap(cfg, True) +def test_delete_rss_context_busy(cfg): + """ + Test that deletion returns -EBUSY when an rss context is being used + by an ntuple filter. + """ + + require_ntuple(cfg) + + # create additional rss context + ctx_id = ethtool_create(cfg, "-X", "context new") + ctx_deleter = defer(ethtool, f"-X {cfg.ifname} context {ctx_id} delete") + + # utilize context from ntuple filter + port = rand_port() + flow = f"flow-type tcp{cfg.addr_ipver} dst-port {port} context {ctx_id}" + ntuple_id = ethtool_create(cfg, "-N", flow) + defer(ethtool, f"-N {cfg.ifname} delete {ntuple_id}") + + # attempt to delete in-use context + try: + ctx_deleter.exec_only() + ctx_deleter.cancel() + raise KsftFailEx(f"deleted context {ctx_id} used by rule {ntuple_id}") + except CmdExitFailure: + pass + + def main() -> None: with NetDrvEpEnv(__file__, nsim_test=False) as cfg: cfg.ethnl = EthtoolFamily() @@ -616,7 +643,8 @@ def main() -> None: test_rss_context, test_rss_context4, test_rss_context32, test_rss_context_dump, test_rss_context_queue_reconfigure, test_rss_context_overlap, test_rss_context_overlap2, - test_rss_context_out_of_order, test_rss_context4_create_with_cfg], + test_rss_context_out_of_order, test_rss_context4_create_with_cfg, + test_delete_rss_context_busy], args=(cfg, )) ksft_exit() -- 2.43.5

8 months, 3 weeks

1
0
0 0

[PATCH,bpf-next v3 0/4] selftests/bpf: migrate and remove cgroup/tracing related tests

by Daniel T. Lee

The BPF testing framework has evolved significantly over time. However, some legacy tests in the samples/bpf directory have not kept up with these changes. These outdated tests can cause confusion and increase maintenance efforts. This patchset focuses on migrating outdated cgroup and tracing-related tests from samples/bpf to selftests/bpf, ensuring the BPF test suite remains current and efficient. Tests that are already covered by selftests/bpf are removed, while those not yet covered are migrated. This includes cgroup sock create tests for setting socket attributes and blocking socket creation, as well as the removal of redundant cgroup and tracing tests that have been replaced by newer tests. This patchset covers the following cgroup/tracing tests: - test_overhead: tests the overhead of BPF programs with task_rename, now covered by selftests and benchmark tests (rename-*). [1] - test_override_return: tests the return override functionality, now handled by kprobe_multi_override in selftests. - test_probe_write_user: tests the probe_write_user functionality, now replaced by the probe_user test in selftests. - test_cgrp2_sock: tests cgroup BPF's ability to set sk_bound_dev_if, mark, and priority during socket creation. Migrated to selftests as 'sock_create' since no existing tests fully cover this. - test_cgrp2_sock2: tests blocking socket creation for specific types (AF_INET{6}, SOCK_DGRAM, IPPROTO_ICMP{V6}). Migrated to selftests in 'sock_create' test for coverage. - test_current_task_under_cgroup: tests bpf_current_task_under_cgroup() to check if a task belongs to a cgroup. Already covered by task_under_cgroup at selftest and other cgroup ID tests. - test_cgrp2_tc: tests bpf_skb_under_cgroup() to filter packets based on cgroup. This behavior is now validated by cgroup_skb_sk_lookup, which uses bpf_skb_cgroup_id, making this test redundant. [1]: https://patchwork.kernel.org/cover/13759916 --- Changes in v2: - commit message fix Changes in v3: - Makefile fix Daniel T. Lee (4): selftests/bpf: migrate cgroup sock create test for setting iface/mark/prio selftests/bpf: migrate cgroup sock create test for prohibiting sockets samples/bpf: remove obsolete cgroup related tests samples/bpf: remove obsolete tracing related tests samples/bpf/Makefile | 25 -- samples/bpf/sock_flags.bpf.c | 47 --- samples/bpf/test_cgrp2_array_pin.c | 106 ------ samples/bpf/test_cgrp2_attach.c | 177 ---------- samples/bpf/test_cgrp2_sock.c | 296 ---------------- samples/bpf/test_cgrp2_sock.sh | 137 ------- samples/bpf/test_cgrp2_sock2.c | 95 ----- samples/bpf/test_cgrp2_sock2.sh | 103 ------ samples/bpf/test_cgrp2_tc.bpf.c | 56 --- samples/bpf/test_cgrp2_tc.sh | 187 ---------- .../bpf/test_current_task_under_cgroup.bpf.c | 43 --- .../bpf/test_current_task_under_cgroup_user.c | 115 ------ samples/bpf/test_overhead_kprobe.bpf.c | 41 --- samples/bpf/test_overhead_raw_tp.bpf.c | 17 - samples/bpf/test_overhead_tp.bpf.c | 23 -- samples/bpf/test_overhead_user.c | 225 ------------ samples/bpf/test_override_return.sh | 16 - samples/bpf/test_probe_write_user.bpf.c | 52 --- samples/bpf/test_probe_write_user_user.c | 108 ------ samples/bpf/tracex7.bpf.c | 15 - samples/bpf/tracex7_user.c | 56 --- .../selftests/bpf/prog_tests/sock_create.c | 333 ++++++++++++++++++ 22 files changed, 333 insertions(+), 1940 deletions(-) delete mode 100644 samples/bpf/sock_flags.bpf.c delete mode 100644 samples/bpf/test_cgrp2_array_pin.c delete mode 100644 samples/bpf/test_cgrp2_attach.c delete mode 100644 samples/bpf/test_cgrp2_sock.c delete mode 100755 samples/bpf/test_cgrp2_sock.sh delete mode 100644 samples/bpf/test_cgrp2_sock2.c delete mode 100755 samples/bpf/test_cgrp2_sock2.sh delete mode 100644 samples/bpf/test_cgrp2_tc.bpf.c delete mode 100755 samples/bpf/test_cgrp2_tc.sh delete mode 100644 samples/bpf/test_current_task_under_cgroup.bpf.c delete mode 100644 samples/bpf/test_current_task_under_cgroup_user.c delete mode 100644 samples/bpf/test_overhead_kprobe.bpf.c delete mode 100644 samples/bpf/test_overhead_raw_tp.bpf.c delete mode 100644 samples/bpf/test_overhead_tp.bpf.c delete mode 100644 samples/bpf/test_overhead_user.c delete mode 100755 samples/bpf/test_override_return.sh delete mode 100644 samples/bpf/test_probe_write_user.bpf.c delete mode 100644 samples/bpf/test_probe_write_user_user.c delete mode 100644 samples/bpf/tracex7.bpf.c delete mode 100644 samples/bpf/tracex7_user.c create mode 100644 tools/testing/selftests/bpf/prog_tests/sock_create.c -- 2.43.0

8 months, 3 weeks

2
5
0 0

[PATCH bpf-next v3 0/3] selftests/bpf: add coverage for xdp_features in test_progs

by Alexis Lothoré (eBPF Foundation)

Hello, this small series aims to increase coverage of xdp features in test_progs. The initial versions proposed to rework test_xdp_features.sh to make it fit in test_progs, but some discussions in v1 and v2 showed that the script is still needed as a standalone tool. So this new revision lets test_xdp_features.sh as-is, and rather adds missing coverage in existing test (cpu map). The new revision is now also a follow-up to the update performed by Florian Kauer in [1] for devmap programs testing. [1] https://lore.kernel.org/bpf/20240911-devel-koalo-fix-ingress-ifindex-v4-2-5… --- Changes in v3: - Drop xdp_features rework commit - update xdp_cpumap_attach to extend its coverage - Link to v2: https://lore.kernel.org/r/20240910-convert_xdp_tests-v2-1-a46367c9d038@boot… Changes in v2: - fix endianness management in userspace packet parsing (call htonl on constant rather than packet part) The new test has been run in a local x86 environment and in CI: #560/1 xdp_cpumap_attach/CPUMAP with programs in entries:OK #560/2 xdp_cpumap_attach/CPUMAP with frags programs in entries:OK #560/3 xdp_cpumap_attach/CPUMAP attach with programs in entries on veth:OK #560 xdp_cpumap_attach:OK Summary: 1/3 PASSED, 0 SKIPPED, 0 FAILED --- Alexis Lothoré (eBPF Foundation) (3): selftests/bpf: fix bpf_map_redirect call for cpu map test selftests/bpf: make xdp_cpumap_attach keep redirect prog attached selftests/bpf: check program redirect in xdp_cpumap_attach .../selftests/bpf/prog_tests/xdp_cpumap_attach.c | 130 +++++++++++++++++++-- .../bpf/progs/test_xdp_with_cpumap_helpers.c | 7 +- 2 files changed, 129 insertions(+), 8 deletions(-) --- base-commit: 058d7c3d1691e2e4a4963716ec6c047dff778637 change-id: 20240730-convert_xdp_tests-ccd66bfe33db Best regards, -- Alexis Lothoré, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

8 months, 3 weeks

4
6
0 0

[RFC PATCH 0/3] Allow sk_lookup UDP return traffic to egress.

by Tiago Lam

Currently, sk_lookup allows an ebpf program to run on the ingress socket lookup path, and accept traffic not only on a range of addresses, but also on a range of ports. At Cloudflare we use sk_lookup for two main cases: 1. Sharing a single port between multiple services - i.e. two services (or more) use disjoint IP ranges but share the same port; 2. Receiving traffic on all ports - i.e. a service which accepts traffic on specific IP ranges but any port [1]. However, one main challenge we face while using sk_lookup for these use cases is how to source return UDP traffic: - On point 1. above, sometimes this range of addresses are not local (i.e. there's no local routes for these in the server), which means we need IP_TRANSPARENT set to be able to egress traffic from addresses we've received traffic on (or simply IP_FREEBIND in the case of IPv6); - And on point 2. above, allowing traffic to a range of ports means a service could get traffic on multiple ports, but currently there's no way to set the source UDP port egress traffic should be sourced from - it's possible to receive the original destination port using the IP_ORIGDSTADDR ancilliary message in recvmsg, but not set it in sendmsg. Both of these limitations can be worked around, but in a sub-optimal way. Using IP_TRANSPARENT, for instance, requires special privileges. And while one could use UDP connected sockets to send return traffic, creating a connected socket for each different address a UDP traffic is received on does have performance implications. Given sk_lookup allows services to accept traffic on a range of addresses or ports, it seems sensible to also allow return traffic to proceed through as well, without needing extra configurations / set ups. This patch set allows to do exactly this by performing a reverse socket lookup on the egress path - where it looks to see if the egress socket matches a socket in the attached sk_lookup ebpf program for the traffic that's being sent. If it does, traffic is allowed to proceed. The downsides to this is that this runs on the egress hot path, although this work tries to minimise its impact by only performing the reverse socket lookup when necessary. Further performance measurements are to be taken, but we're reaching out early for feedback to see what the technical concerns are and if we can address them. [1] https://blog.cloudflare.com/how-we-built-spectrum/ Suggested-by: Jakub Sitnicki <jakub(a)cloudflare.com> Signed-off-by: Tiago Lam <tiagolam(a)cloudflare.com> --- Tiago Lam (3): ipv4: Run a reverse sk_lookup on sendmsg. ipv6: Run a reverse sk_lookup on sendmsg. bpf: Add sk_lookup test to use ORIGDSTADDR cmsg. include/net/ip.h | 1 + net/ipv4/ip_sockglue.c | 11 ++++ net/ipv4/udp.c | 33 +++++++++- net/ipv6/datagram.c | 76 ++++++++++++++++++++++ net/ipv6/udp.c | 8 ++- tools/testing/selftests/bpf/prog_tests/sk_lookup.c | 70 +++++++++++++------- 6 files changed, 174 insertions(+), 25 deletions(-) --- base-commit: da3ea35007d0af457a0afc87e84fddaebc4e0b63 change-id: 20240909-reverse-sk-lookup-f7bf36292bc4 Best regards, -- Tiago Lam <tiagolam(a)cloudflare.com>

8 months, 3 weeks

6
15
0 0

[PATCH] lib: Move KUnit tests into tests/ subdirectory

by Kees Cook

Following from the recent KUnit file naming discussion[1], move all KUnit tests in lib/ into lib/tests/. Link: https://lore.kernel.org/lkml/20240720165441.it.320-kees@kernel.org/ [1] Signed-off-by: Kees Cook <kees(a)kernel.org> --- I can carry this in the hardening tree. To disrupt people as little as possible, I'm hoping to send this either at the end of -rc1 or early in -rc2. Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Yury Norov <yury.norov(a)gmail.com> Cc: Rasmus Villemoes <linux(a)rasmusvillemoes.dk> Cc: David Gow <davidgow(a)google.com> Cc: "Jason A. Donenfeld" <Jason(a)zx2c4.com> Cc: Andy Shevchenko <andy(a)kernel.org> Cc: "Naveen N. Rao" <naveen.n.rao(a)linux.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy(a)intel.com> Cc: "David S. Miller" <davem(a)davemloft.net> Cc: Masami Hiramatsu <mhiramat(a)kernel.org> Cc: Mark Brown <broonie(a)kernel.org> Cc: Matti Vaittinen <mazziesaccount(a)gmail.com> Cc: linux-hardening(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Cc: kunit-dev(a)googlegroups.com Cc: linux-trace-kernel(a)vger.kernel.org --- MAINTAINERS | 18 ++++++------- lib/Makefile | 35 +----------------------- lib/tests/Makefile | 37 ++++++++++++++++++++++++++ lib/{ => tests}/bitfield_kunit.c | 0 lib/{ => tests}/checksum_kunit.c | 0 lib/{ => tests}/cmdline_kunit.c | 0 lib/{ => tests}/cpumask_kunit.c | 0 lib/{ => tests}/fortify_kunit.c | 0 lib/{ => tests}/hashtable_test.c | 0 lib/{ => tests}/is_signed_type_kunit.c | 0 lib/{ => tests}/kunit_iov_iter.c | 0 lib/{ => tests}/list-test.c | 0 lib/{ => tests}/memcpy_kunit.c | 0 lib/{ => tests}/overflow_kunit.c | 0 lib/{ => tests}/siphash_kunit.c | 0 lib/{ => tests}/slub_kunit.c | 0 lib/{ => tests}/stackinit_kunit.c | 0 lib/{ => tests}/string_helpers_kunit.c | 0 lib/{ => tests}/string_kunit.c | 0 lib/{ => tests}/test_bits.c | 0 lib/{ => tests}/test_fprobe.c | 0 lib/{ => tests}/test_hash.c | 0 lib/{ => tests}/test_kprobes.c | 0 lib/{ => tests}/test_linear_ranges.c | 0 lib/{ => tests}/test_list_sort.c | 0 lib/{ => tests}/test_sort.c | 0 26 files changed, 47 insertions(+), 43 deletions(-) create mode 100644 lib/tests/Makefile rename lib/{ => tests}/bitfield_kunit.c (100%) rename lib/{ => tests}/checksum_kunit.c (100%) rename lib/{ => tests}/cmdline_kunit.c (100%) rename lib/{ => tests}/cpumask_kunit.c (100%) rename lib/{ => tests}/fortify_kunit.c (100%) rename lib/{ => tests}/hashtable_test.c (100%) rename lib/{ => tests}/is_signed_type_kunit.c (100%) rename lib/{ => tests}/kunit_iov_iter.c (100%) rename lib/{ => tests}/list-test.c (100%) rename lib/{ => tests}/memcpy_kunit.c (100%) rename lib/{ => tests}/overflow_kunit.c (100%) rename lib/{ => tests}/siphash_kunit.c (100%) rename lib/{ => tests}/slub_kunit.c (100%) rename lib/{ => tests}/stackinit_kunit.c (100%) rename lib/{ => tests}/string_helpers_kunit.c (100%) rename lib/{ => tests}/string_kunit.c (100%) rename lib/{ => tests}/test_bits.c (100%) rename lib/{ => tests}/test_fprobe.c (100%) rename lib/{ => tests}/test_hash.c (100%) rename lib/{ => tests}/test_kprobes.c (100%) rename lib/{ => tests}/test_linear_ranges.c (100%) rename lib/{ => tests}/test_list_sort.c (100%) rename lib/{ => tests}/test_sort.c (100%) diff --git a/MAINTAINERS b/MAINTAINERS index 8754ac2c259d..3f4b9d007cbb 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3737,10 +3737,10 @@ F: include/vdso/bits.h F: lib/bitmap-str.c F: lib/bitmap.c F: lib/cpumask.c -F: lib/cpumask_kunit.c F: lib/find_bit.c F: lib/find_bit_benchmark.c F: lib/test_bitmap.c +F: lib/tests/cpumask_kunit.c F: tools/include/linux/bitfield.h F: tools/include/linux/bitmap.h F: tools/include/linux/bits.h @@ -8618,9 +8618,9 @@ L: linux-hardening(a)vger.kernel.org S: Supported T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening F: include/linux/fortify-string.h -F: lib/fortify_kunit.c -F: lib/memcpy_kunit.c F: lib/test_fortify/* +F: lib/tests/fortify_kunit.c +F: lib/tests/memcpy_kunit.c F: scripts/test_fortify.sh K: \b__NO_FORTIFY\b @@ -9246,9 +9246,9 @@ F: include/linux/string.h F: include/linux/string_choices.h F: include/linux/string_helpers.h F: lib/string.c -F: lib/string_kunit.c F: lib/string_helpers.c -F: lib/string_helpers_kunit.c +F: lib/tests/string_helpers_kunit.c +F: lib/tests/string_kunit.c F: scripts/coccinelle/api/string_choices.cocci GENERIC UIO DRIVER FOR PCI DEVICES @@ -12347,7 +12347,7 @@ F: Documentation/trace/kprobes.rst F: include/asm-generic/kprobes.h F: include/linux/kprobes.h F: kernel/kprobes.c -F: lib/test_kprobes.c +F: lib/tests/test_kprobes.c F: samples/kprobes KS0108 LCD CONTROLLER DRIVER @@ -12697,7 +12697,7 @@ M: Mark Brown <broonie(a)kernel.org> R: Matti Vaittinen <mazziesaccount(a)gmail.com> F: include/linux/linear_range.h F: lib/linear_ranges.c -F: lib/test_linear_ranges.c +F: lib/tests/test_linear_ranges.c LINUX FOR POWER MACINTOSH L: linuxppc-dev(a)lists.ozlabs.org @@ -12824,7 +12824,7 @@ M: David Gow <davidgow(a)google.com> L: linux-kselftest(a)vger.kernel.org L: kunit-dev(a)googlegroups.com S: Maintained -F: lib/list-test.c +F: lib/tests/list-test.c LITEX PLATFORM M: Karol Gugala <kgugala(a)antmicro.com> @@ -20498,7 +20498,7 @@ M: Jason A. Donenfeld <Jason(a)zx2c4.com> S: Maintained F: include/linux/siphash.h F: lib/siphash.c -F: lib/siphash_kunit.c +F: lib/tests/siphash_kunit.c SIS 190 ETHERNET DRIVER M: Francois Romieu <romieu(a)fr.zoreil.com> diff --git a/lib/Makefile b/lib/Makefile index 3b1769045651..f00fe120ee9e 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -49,9 +49,7 @@ obj-y += bcd.o sort.o parser.o debug_locks.o random32.o \ percpu-refcount.o rhashtable.o base64.o \ once.o refcount.o rcuref.o usercopy.o errseq.o bucket_locks.o \ generic-radix-tree.o bitmap-str.o -obj-$(CONFIG_STRING_KUNIT_TEST) += string_kunit.o obj-y += string_helpers.o -obj-$(CONFIG_STRING_HELPERS_KUNIT_TEST) += string_helpers_kunit.o obj-y += hexdump.o obj-$(CONFIG_TEST_HEXDUMP) += test_hexdump.o obj-y += kstrtox.o @@ -62,22 +60,17 @@ obj-$(CONFIG_TEST_DHRY) += test_dhry.o obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o obj-$(CONFIG_TEST_BITOPS) += test_bitops.o CFLAGS_test_bitops.o += -Werror -obj-$(CONFIG_CPUMASK_KUNIT_TEST) += cpumask_kunit.o obj-$(CONFIG_TEST_SYSCTL) += test_sysctl.o -obj-$(CONFIG_TEST_IOV_ITER) += kunit_iov_iter.o -obj-$(CONFIG_HASH_KUNIT_TEST) += test_hash.o obj-$(CONFIG_TEST_IDA) += test_ida.o obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla) CFLAGS_test_ubsan.o += $(call cc-disable-warning, unused-but-set-variable) UBSAN_SANITIZE_test_ubsan.o := y obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o -obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o obj-$(CONFIG_TEST_MIN_HEAP) += test_min_heap.o obj-$(CONFIG_TEST_LKM) += test_module.o obj-$(CONFIG_TEST_VMALLOC) += test_vmalloc.o obj-$(CONFIG_TEST_RHASHTABLE) += test_rhashtable.o -obj-$(CONFIG_TEST_SORT) += test_sort.o obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o @@ -104,10 +97,7 @@ obj-$(CONFIG_TEST_MEMINIT) += test_meminit.o obj-$(CONFIG_TEST_LOCKUP) += test_lockup.o obj-$(CONFIG_TEST_HMM) += test_hmm.o obj-$(CONFIG_TEST_FREE_PAGES) += test_free_pages.o -obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o obj-$(CONFIG_TEST_REF_TRACKER) += test_ref_tracker.o -CFLAGS_test_fprobe.o += $(CC_FLAGS_FTRACE) -obj-$(CONFIG_FPROBE_SANITY_TEST) += test_fprobe.o obj-$(CONFIG_TEST_OBJPOOL) += test_objpool.o obj-$(CONFIG_TEST_FPU) += test_fpu.o @@ -129,7 +119,7 @@ endif obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any) -obj-y += math/ crypto/ +obj-y += math/ crypto/ tests/ obj-$(CONFIG_GENERIC_IOMAP) += iomap.o obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o @@ -366,29 +356,6 @@ obj-$(CONFIG_OBJAGG) += objagg.o # pldmfw library obj-$(CONFIG_PLDMFW) += pldmfw/ -# KUnit tests -CFLAGS_bitfield_kunit.o := $(DISABLE_STRUCTLEAK_PLUGIN) -obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o -obj-$(CONFIG_CHECKSUM_KUNIT) += checksum_kunit.o -obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o -obj-$(CONFIG_HASHTABLE_KUNIT_TEST) += hashtable_test.o -obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o -obj-$(CONFIG_BITS_TEST) += test_bits.o -obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o -obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o -obj-$(CONFIG_MEMCPY_KUNIT_TEST) += memcpy_kunit.o -obj-$(CONFIG_IS_SIGNED_TYPE_KUNIT_TEST) += is_signed_type_kunit.o -CFLAGS_overflow_kunit.o = $(call cc-disable-warning, tautological-constant-out-of-range-compare) -obj-$(CONFIG_OVERFLOW_KUNIT_TEST) += overflow_kunit.o -CFLAGS_stackinit_kunit.o += $(call cc-disable-warning, switch-unreachable) -obj-$(CONFIG_STACKINIT_KUNIT_TEST) += stackinit_kunit.o -CFLAGS_fortify_kunit.o += $(call cc-disable-warning, unsequenced) -CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-overread) -CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-truncation) -CFLAGS_fortify_kunit.o += $(DISABLE_STRUCTLEAK_PLUGIN) -obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o -obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o - obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o obj-$(CONFIG_FIRMWARE_TABLE) += fw_table.o diff --git a/lib/tests/Makefile b/lib/tests/Makefile new file mode 100644 index 000000000000..c6a14cc8663e --- /dev/null +++ b/lib/tests/Makefile @@ -0,0 +1,37 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for tests of kernel library functions. + +# KUnit tests +CFLAGS_bitfield_kunit.o := $(DISABLE_STRUCTLEAK_PLUGIN) +obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o +obj-$(CONFIG_BITS_TEST) += test_bits.o +obj-$(CONFIG_CHECKSUM_KUNIT) += checksum_kunit.o +obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o +obj-$(CONFIG_CPUMASK_KUNIT_TEST) += cpumask_kunit.o +CFLAGS_fortify_kunit.o += $(call cc-disable-warning, unsequenced) +CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-overread) +CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-truncation) +CFLAGS_fortify_kunit.o += $(DISABLE_STRUCTLEAK_PLUGIN) +obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o +CFLAGS_test_fprobe.o += $(CC_FLAGS_FTRACE) +obj-$(CONFIG_FPROBE_SANITY_TEST) += test_fprobe.o +obj-$(CONFIG_HASHTABLE_KUNIT_TEST) += hashtable_test.o +obj-$(CONFIG_HASH_KUNIT_TEST) += test_hash.o +obj-$(CONFIG_TEST_IOV_ITER) += kunit_iov_iter.o +obj-$(CONFIG_IS_SIGNED_TYPE_KUNIT_TEST) += is_signed_type_kunit.o +obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o +obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o +obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o +obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o +obj-$(CONFIG_MEMCPY_KUNIT_TEST) += memcpy_kunit.o +CFLAGS_overflow_kunit.o = $(call cc-disable-warning, tautological-constant-out-of-range-compare) +obj-$(CONFIG_OVERFLOW_KUNIT_TEST) += overflow_kunit.o +obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o +obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o +obj-$(CONFIG_TEST_SORT) += test_sort.o +CFLAGS_stackinit_kunit.o += $(call cc-disable-warning, switch-unreachable) +obj-$(CONFIG_STACKINIT_KUNIT_TEST) += stackinit_kunit.o +obj-$(CONFIG_STRING_KUNIT_TEST) += string_kunit.o +obj-$(CONFIG_STRING_HELPERS_KUNIT_TEST) += string_helpers_kunit.o + diff --git a/lib/bitfield_kunit.c b/lib/tests/bitfield_kunit.c similarity index 100% rename from lib/bitfield_kunit.c rename to lib/tests/bitfield_kunit.c diff --git a/lib/checksum_kunit.c b/lib/tests/checksum_kunit.c similarity index 100% rename from lib/checksum_kunit.c rename to lib/tests/checksum_kunit.c diff --git a/lib/cmdline_kunit.c b/lib/tests/cmdline_kunit.c similarity index 100% rename from lib/cmdline_kunit.c rename to lib/tests/cmdline_kunit.c diff --git a/lib/cpumask_kunit.c b/lib/tests/cpumask_kunit.c similarity index 100% rename from lib/cpumask_kunit.c rename to lib/tests/cpumask_kunit.c diff --git a/lib/fortify_kunit.c b/lib/tests/fortify_kunit.c similarity index 100% rename from lib/fortify_kunit.c rename to lib/tests/fortify_kunit.c diff --git a/lib/hashtable_test.c b/lib/tests/hashtable_test.c similarity index 100% rename from lib/hashtable_test.c rename to lib/tests/hashtable_test.c diff --git a/lib/is_signed_type_kunit.c b/lib/tests/is_signed_type_kunit.c similarity index 100% rename from lib/is_signed_type_kunit.c rename to lib/tests/is_signed_type_kunit.c diff --git a/lib/kunit_iov_iter.c b/lib/tests/kunit_iov_iter.c similarity index 100% rename from lib/kunit_iov_iter.c rename to lib/tests/kunit_iov_iter.c diff --git a/lib/list-test.c b/lib/tests/list-test.c similarity index 100% rename from lib/list-test.c rename to lib/tests/list-test.c diff --git a/lib/memcpy_kunit.c b/lib/tests/memcpy_kunit.c similarity index 100% rename from lib/memcpy_kunit.c rename to lib/tests/memcpy_kunit.c diff --git a/lib/overflow_kunit.c b/lib/tests/overflow_kunit.c similarity index 100% rename from lib/overflow_kunit.c rename to lib/tests/overflow_kunit.c diff --git a/lib/siphash_kunit.c b/lib/tests/siphash_kunit.c similarity index 100% rename from lib/siphash_kunit.c rename to lib/tests/siphash_kunit.c diff --git a/lib/slub_kunit.c b/lib/tests/slub_kunit.c similarity index 100% rename from lib/slub_kunit.c rename to lib/tests/slub_kunit.c diff --git a/lib/stackinit_kunit.c b/lib/tests/stackinit_kunit.c similarity index 100% rename from lib/stackinit_kunit.c rename to lib/tests/stackinit_kunit.c diff --git a/lib/string_helpers_kunit.c b/lib/tests/string_helpers_kunit.c similarity index 100% rename from lib/string_helpers_kunit.c rename to lib/tests/string_helpers_kunit.c diff --git a/lib/string_kunit.c b/lib/tests/string_kunit.c similarity index 100% rename from lib/string_kunit.c rename to lib/tests/string_kunit.c diff --git a/lib/test_bits.c b/lib/tests/test_bits.c similarity index 100% rename from lib/test_bits.c rename to lib/tests/test_bits.c diff --git a/lib/test_fprobe.c b/lib/tests/test_fprobe.c similarity index 100% rename from lib/test_fprobe.c rename to lib/tests/test_fprobe.c diff --git a/lib/test_hash.c b/lib/tests/test_hash.c similarity index 100% rename from lib/test_hash.c rename to lib/tests/test_hash.c diff --git a/lib/test_kprobes.c b/lib/tests/test_kprobes.c similarity index 100% rename from lib/test_kprobes.c rename to lib/tests/test_kprobes.c diff --git a/lib/test_linear_ranges.c b/lib/tests/test_linear_ranges.c similarity index 100% rename from lib/test_linear_ranges.c rename to lib/tests/test_linear_ranges.c diff --git a/lib/test_list_sort.c b/lib/tests/test_list_sort.c similarity index 100% rename from lib/test_list_sort.c rename to lib/tests/test_list_sort.c diff --git a/lib/test_sort.c b/lib/tests/test_sort.c similarity index 100% rename from lib/test_sort.c rename to lib/tests/test_sort.c -- 2.34.1

8 months, 3 weeks

5
6
0 0

[PATCH v2 0/1] Add KUnit tests for kfifo

by Diego Vieira

Hi all, This is part of a hackathon organized by LKCAMP [1], focused on writing tests using KUnit. We reached out a while ago asking for advice on what would be a useful contribution [2] and ended up choosing data structures that did not yet have tests. This patch series depends on the patch that moves the KUnit tests on lib/ into lib/tests/ [3]. This patch adds tests for the kfifo data structure, defined in include/linux/kfifo.h, and is inspired by the KUnit tests for the doubly linked list in lib/tests/list-test.c (previously at lib/list-test.c) [4]. [1] https://lkcamp.dev/about/ [2] https://lore.kernel.org/all/Zktnt7rjKryTh9-N@arch/ [3] https://lore.kernel.org/all/20240720181025.work.002-kees@kernel.org/ [4] https://elixir.bootlin.com/linux/latest/source/lib/list-test.c --- Changes in v2: - Add MODULE_DESCRIPTION() - Move the tests from lib/kfifo-test.c to lib/tests/kfifo_kunit.c Diego Vieira (1): lib/tests/kfifo_kunit.c: add tests for the kfifo structure lib/Kconfig.debug | 14 +++ lib/tests/Makefile | 1 + lib/tests/kfifo_kunit.c | 224 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 239 insertions(+) create mode 100644 lib/tests/kfifo_kunit.c -- 2.34.1

8 months, 3 weeks

5
5
0 0

[PATCH,bpf-next v2 0/4] selftests/bpf: migrate and remove cgroup/tracing related tests

by Daniel T. Lee

The BPF testing framework has evolved significantly over time. However, some legacy tests in the samples/bpf directory have not kept up with these changes. These outdated tests can cause confusion and increase maintenance efforts. This patchset focuses on migrating outdated cgroup and tracing-related tests from samples/bpf to selftests/bpf, ensuring the BPF test suite remains current and efficient. Tests that are already covered by selftests/bpf are removed, while those not yet covered are migrated. This includes cgroup sock create tests for setting socket attributes and blocking socket creation, as well as the removal of redundant cgroup and tracing tests that have been replaced by newer tests. This patchset covers the following cgroup/tracing tests: - test_overhead: tests the overhead of BPF programs with task_rename, now covered by selftests and benchmark tests (rename-*). [1] - test_override_return: tests the return override functionality, now handled by kprobe_multi_override in selftests. - test_probe_write_user: tests the probe_write_user functionality, now replaced by the probe_user test in selftests. - test_cgrp2_sock: tests cgroup BPF's ability to set sk_bound_dev_if, mark, and priority during socket creation. Migrated to selftests as 'sock_create' since no existing tests fully cover this. - test_cgrp2_sock2: tests blocking socket creation for specific types (AF_INET{6}, SOCK_DGRAM, IPPROTO_ICMP{V6}). Migrated to selftests in 'sock_create' test for coverage. - test_current_task_under_cgroup: tests bpf_current_task_under_cgroup() to check if a task belongs to a cgroup. Already covered by task_under_cgroup at selftest and other cgroup ID tests. - test_cgrp2_tc: tests bpf_skb_under_cgroup() to filter packets based on cgroup. This behavior is now validated by cgroup_skb_sk_lookup, which uses bpf_skb_cgroup_id, making this test redundant. [1]: https://patchwork.kernel.org/cover/13759916 Daniel T. Lee (4): selftests/bpf: migrate cgroup sock create test for setting iface/mark/prio selftests/bpf: migrate cgroup sock create tests for prohibitig sockets samples/bpf: remove obsolete cgroup related tests samples/bpf: remove obsolete tracing related tests --- Changes in v2: - commit message fix samples/bpf/Makefile | 24 -- samples/bpf/sock_flags.bpf.c | 47 --- samples/bpf/test_cgrp2_array_pin.c | 106 ------ samples/bpf/test_cgrp2_attach.c | 177 ---------- samples/bpf/test_cgrp2_sock.c | 296 ---------------- samples/bpf/test_cgrp2_sock.sh | 137 ------- samples/bpf/test_cgrp2_sock2.c | 95 ----- samples/bpf/test_cgrp2_sock2.sh | 103 ------ samples/bpf/test_cgrp2_tc.bpf.c | 56 --- samples/bpf/test_cgrp2_tc.sh | 187 ---------- .../bpf/test_current_task_under_cgroup.bpf.c | 43 --- .../bpf/test_current_task_under_cgroup_user.c | 115 ------ samples/bpf/test_overhead_kprobe.bpf.c | 41 --- samples/bpf/test_overhead_raw_tp.bpf.c | 17 - samples/bpf/test_overhead_tp.bpf.c | 23 -- samples/bpf/test_overhead_user.c | 225 ------------ samples/bpf/test_override_return.sh | 16 - samples/bpf/test_probe_write_user.bpf.c | 52 --- samples/bpf/test_probe_write_user_user.c | 108 ------ samples/bpf/tracex7.bpf.c | 15 - samples/bpf/tracex7_user.c | 56 --- .../selftests/bpf/prog_tests/sock_create.c | 333 ++++++++++++++++++ 22 files changed, 333 insertions(+), 1939 deletions(-) delete mode 100644 samples/bpf/sock_flags.bpf.c delete mode 100644 samples/bpf/test_cgrp2_array_pin.c delete mode 100644 samples/bpf/test_cgrp2_attach.c delete mode 100644 samples/bpf/test_cgrp2_sock.c delete mode 100755 samples/bpf/test_cgrp2_sock.sh delete mode 100644 samples/bpf/test_cgrp2_sock2.c delete mode 100755 samples/bpf/test_cgrp2_sock2.sh delete mode 100644 samples/bpf/test_cgrp2_tc.bpf.c delete mode 100755 samples/bpf/test_cgrp2_tc.sh delete mode 100644 samples/bpf/test_current_task_under_cgroup.bpf.c delete mode 100644 samples/bpf/test_current_task_under_cgroup_user.c delete mode 100644 samples/bpf/test_overhead_kprobe.bpf.c delete mode 100644 samples/bpf/test_overhead_raw_tp.bpf.c delete mode 100644 samples/bpf/test_overhead_tp.bpf.c delete mode 100644 samples/bpf/test_overhead_user.c delete mode 100755 samples/bpf/test_override_return.sh delete mode 100644 samples/bpf/test_probe_write_user.bpf.c delete mode 100644 samples/bpf/test_probe_write_user_user.c delete mode 100644 samples/bpf/tracex7.bpf.c delete mode 100644 samples/bpf/tracex7_user.c create mode 100644 tools/testing/selftests/bpf/prog_tests/sock_create.c -- 2.43.0

8 months, 3 weeks

1
4
0 0

[bpf-next 0/4] selftests/bpf: migrate and remove cgroup/tracing related tests

by Daniel T. Lee

The BPF testing framework has evolved significantly over time. However, some legacy tests in the samples/bpf directory have not kept up with these changes. These outdated tests can cause confusion and increase maintenance efforts. This patchset focuses on migrating outdated cgroup and tracing-related tests from samples/bpf to selftests/bpf, ensuring the BPF test suite remains current and efficient. Tests that are already covered by selftests/bpf are removed, while those not yet covered are migrated. This includes cgroup sock create tests for setting socket attributes and blocking socket creation, as well as the removal of redundant cgroup and tracing tests that have been replaced by newer tests. This patchset covers the following cgroup/tracing tests: - test_overhead: tests the overhead of BPF programs with task_rename, now covered by selftests and benchmark tests (rename-*). [1] - test_override_return: tests the return override functionality, now handled by kprobe_multi_override in selftests. - test_probe_write_user: tests the probe_write_user functionality, now replaced by the probe_user test in selftests. - test_cgrp2_sock: tests cgroup BPF's ability to set sk_bound_dev_if, mark, and priority during socket creation. Migrated to selftests as 'sock_create' since no existing tests fully cover this. - test_cgrp2_sock2: tests blocking socket creation for specific types (AF_INET{6}, SOCK_DGRAM, IPPROTO_ICMP{V6}). Migrated to selftests in 'sock_create' test for coverage. - test_current_task_under_cgroup: tests bpf_current_task_under_cgroup() to check if a task belongs to a cgroup. Already covered by task_under_cgroup at selftest and other cgroup ID tests. - test_cgrp2_tc: tests bpf_skb_under_cgroup() to filter packets based on cgroup. This behavior is now validated by cgroup_skb_sk_lookup, which uses bpf_skb_cgroup_id, making this test redundant. Daniel T. Lee (4): selftests/bpf: migrate cgroup sock create test for setting iface/mark/prio selftests/bpf: migrate sock create tests for prohibitig sockets samples/bpf: remove obsolete cgroup related tests samples/bpf: remove obsolete tracing related tests samples/bpf/Makefile | 24 -- samples/bpf/sock_flags.bpf.c | 47 --- samples/bpf/test_cgrp2_array_pin.c | 106 ------ samples/bpf/test_cgrp2_attach.c | 177 ---------- samples/bpf/test_cgrp2_sock.c | 296 ---------------- samples/bpf/test_cgrp2_sock.sh | 137 ------- samples/bpf/test_cgrp2_sock2.c | 95 ----- samples/bpf/test_cgrp2_sock2.sh | 103 ------ samples/bpf/test_cgrp2_tc.bpf.c | 56 --- samples/bpf/test_cgrp2_tc.sh | 187 ---------- .../bpf/test_current_task_under_cgroup.bpf.c | 43 --- .../bpf/test_current_task_under_cgroup_user.c | 115 ------ samples/bpf/test_overhead_kprobe.bpf.c | 41 --- samples/bpf/test_overhead_raw_tp.bpf.c | 17 - samples/bpf/test_overhead_tp.bpf.c | 23 -- samples/bpf/test_overhead_user.c | 225 ------------ samples/bpf/test_override_return.sh | 16 - samples/bpf/test_probe_write_user.bpf.c | 52 --- samples/bpf/test_probe_write_user_user.c | 108 ------ samples/bpf/tracex7.bpf.c | 15 - samples/bpf/tracex7_user.c | 56 --- .../selftests/bpf/prog_tests/sock_create.c | 333 ++++++++++++++++++ 22 files changed, 333 insertions(+), 1939 deletions(-) delete mode 100644 samples/bpf/sock_flags.bpf.c delete mode 100644 samples/bpf/test_cgrp2_array_pin.c delete mode 100644 samples/bpf/test_cgrp2_attach.c delete mode 100644 samples/bpf/test_cgrp2_sock.c delete mode 100755 samples/bpf/test_cgrp2_sock.sh delete mode 100644 samples/bpf/test_cgrp2_sock2.c delete mode 100755 samples/bpf/test_cgrp2_sock2.sh delete mode 100644 samples/bpf/test_cgrp2_tc.bpf.c delete mode 100755 samples/bpf/test_cgrp2_tc.sh delete mode 100644 samples/bpf/test_current_task_under_cgroup.bpf.c delete mode 100644 samples/bpf/test_current_task_under_cgroup_user.c delete mode 100644 samples/bpf/test_overhead_kprobe.bpf.c delete mode 100644 samples/bpf/test_overhead_raw_tp.bpf.c delete mode 100644 samples/bpf/test_overhead_tp.bpf.c delete mode 100644 samples/bpf/test_overhead_user.c delete mode 100755 samples/bpf/test_override_return.sh delete mode 100644 samples/bpf/test_probe_write_user.bpf.c delete mode 100644 samples/bpf/test_probe_write_user_user.c delete mode 100644 samples/bpf/tracex7.bpf.c delete mode 100644 samples/bpf/tracex7_user.c create mode 100644 tools/testing/selftests/bpf/prog_tests/sock_create.c -- 2.43.0

8 months, 3 weeks

1
4
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[PATCH] selftests/bpf: Removed redundant fd after close in bpf_prog_load_log_buf

by Zhu Jun

Removed unnecessary `fd = -1` assignments after closing file descriptors. because it will be assigned by the function bpf_prog_load().This improves code readability and removes redundant operations. Signed-off-by: Zhu Jun <zhujun2(a)cmss.chinamobile.com> --- tools/testing/selftests/bpf/prog_tests/log_buf.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/log_buf.c b/tools/testing/selftests/bpf/prog_tests/log_buf.c index 27676a04d0b6..169ce689b97c 100644 --- a/tools/testing/selftests/bpf/prog_tests/log_buf.c +++ b/tools/testing/selftests/bpf/prog_tests/log_buf.c @@ -169,7 +169,6 @@ static void bpf_prog_load_log_buf(void) ASSERT_GE(fd, 0, "good_fd1"); if (fd >= 0) close(fd); - fd = -1; /* log_level == 2 should always fill log_buf, even for good prog */ log_buf[0] = '\0'; @@ -180,7 +179,6 @@ static void bpf_prog_load_log_buf(void) ASSERT_GE(fd, 0, "good_fd2"); if (fd >= 0) close(fd); - fd = -1; /* log_level == 0 should fill log_buf for bad prog */ log_buf[0] = '\0'; @@ -191,7 +189,6 @@ static void bpf_prog_load_log_buf(void) ASSERT_LT(fd, 0, "bad_fd"); if (fd >= 0) close(fd); - fd = -1; free(log_buf); } -- 2.17.1

8 months, 3 weeks

2
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[PATCH bpf v1] selftests/bpf: Fix cross-compiling urandom_read

by Tony Ambardar

Linking of urandom_read and liburandom_read.so prefers LLVM's 'ld.lld' but falls back to using 'ld' if unsupported. However, this fallback discards any existing makefile macro for LD and can break cross-compilation. Fix by changing the fallback to use the target linker $(LD), passed via '-fuse-ld=' using an absolute path rather than a linker "flavour". Fixes: 08c79c9cd67f ("selftests/bpf: Don't force lld on non-x86 architectures") Signed-off-by: Tony Ambardar <tony.ambardar(a)gmail.com> --- tools/testing/selftests/bpf/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 5e366f2fc02a..f2a0f912e038 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -263,7 +263,7 @@ $(OUTPUT)/%:%.c ifeq ($(SRCARCH),$(filter $(SRCARCH),x86 riscv)) LLD := lld else -LLD := ld +LLD := $(shell command -v $(LD)) endif # Filter out -static for liburandom_read.so and its dependent targets so that static builds -- 2.34.1

8 months, 3 weeks

2
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[PATCH bpf v1 1/2] bpf: fix unpopulated path_size when uprobe_multi fields unset

by Tyrone Wu

Previously when retrieving `bpf_link_info.uprobe_multi` with `path` and `path_size` fields unset, the `path_size` field is not populated (remains 0). This behavior was inconsistent with how other input/output string buffer fields work, as the field should be populated in cases when: - both buffer and length are set (currently works as expected) - both buffer and length are unset (not working as expected) This patch now fills the `path_size` field when `path` and `path_size` are unset. Fixes: e56fdbfb06e2 ("bpf: Add link_info support for uprobe multi link") Signed-off-by: Tyrone Wu <wudevelops(a)gmail.com> --- kernel/trace/bpf_trace.c | 35 +++++++++++++++++------------------ 1 file changed, 17 insertions(+), 18 deletions(-) diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index a582cd25ca87..ba34e4f3fa8f 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -3133,7 +3133,8 @@ static int bpf_uprobe_multi_link_fill_link_info(const struct bpf_link *link, struct bpf_uprobe_multi_link *umulti_link; u32 ucount = info->uprobe_multi.count; int err = 0, i; - long left; + char *p, *buf; + long left = 0; if (!upath ^ !upath_size) return -EINVAL; @@ -3147,26 +3148,24 @@ static int bpf_uprobe_multi_link_fill_link_info(const struct bpf_link *link, info->uprobe_multi.pid = umulti_link->task ? task_pid_nr_ns(umulti_link->task, task_active_pid_ns(current)) : 0; - if (upath) { - char *p, *buf; - - upath_size = min_t(u32, upath_size, PATH_MAX); + upath_size = upath_size ? min_t(u32, upath_size, PATH_MAX) : PATH_MAX; + buf = kmalloc(upath_size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + p = d_path(&umulti_link->path, buf, upath_size); + if (IS_ERR(p)) { + kfree(buf); + return PTR_ERR(p); + } + upath_size = buf + upath_size - p; - buf = kmalloc(upath_size, GFP_KERNEL); - if (!buf) - return -ENOMEM; - p = d_path(&umulti_link->path, buf, upath_size); - if (IS_ERR(p)) { - kfree(buf); - return PTR_ERR(p); - } - upath_size = buf + upath_size - p; + if (upath) { left = copy_to_user(upath, p, upath_size); - kfree(buf); - if (left) - return -EFAULT; - info->uprobe_multi.path_size = upath_size; } + kfree(buf); + if (left) + return -EFAULT; + info->uprobe_multi.path_size = upath_size; if (!uoffsets && !ucookies && !uref_ctr_offsets) return 0; -- 2.43.0

8 months, 3 weeks

3
5
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kselftest/fixes kselftest-seccomp: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed)

by kernelci.org bot

kselftest/fixes kselftest-seccomp: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-seccomp Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: e26e42b5679edf8c1226970325366f962555e58f Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/670866b6913f5044d0c86896 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-seccomp.login: https://kernelci.org/test/case/id/670866b6913f5044d0c86897 failing since 1 day (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

8 months, 3 weeks

1
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kselftest/fixes kselftest-lib: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed)

by kernelci.org bot

kselftest/fixes kselftest-lib: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-lib Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: e26e42b5679edf8c1226970325366f962555e58f Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/670867935b7b683c98c86855 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lib.login: https://kernelci.org/test/case/id/670867935b7b683c98c86856 failing since 1 day (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

8 months, 3 weeks

1
0
0 0

kselftest/fixes kselftest-cpufreq: 3 runs, 2 regressions (linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed)

by kernelci.org bot

kselftest/fixes kselftest-cpufreq: 3 runs, 2 regressions (linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-cpufreq Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: e26e42b5679edf8c1226970325366f962555e58f Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6708676e7a41ae1109c86861 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/6708676e7a41ae1109c86862 failing since 1 day (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/67086a1a7942f7bc76c86875 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/67086a1a7942f7bc76c86876 failing since 1 day (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

8 months, 3 weeks

1
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kselftest/fixes build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed)

by kernelci.org bot

kselftest/fixes build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed) Full Build Summary: https://kernelci.org/build/kselftest/branch/fixes/kernel/linux_kselftest-fi… Tree: kselftest Branch: fixes Git Describe: linux_kselftest-fixes-6.12-rc2-6-ge26e42b5679ed Git Commit: e26e42b5679edf8c1226970325366f962555e58f Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

8 months, 3 weeks

1
0
0 0

[PATCH v3] ftrace/selftest: Test combination of function_graph tracer and function profiler

by Steven Rostedt

From: Steven Rostedt <rostedt(a)goodmis.org> Masami reported a bug when running function graph tracing then the function profiler. The following commands would cause a kernel crash: # cd /sys/kernel/tracing/ # echo function_graph > current_tracer # echo 1 > function_profile_enabled In that order. Create a test to test this two to make sure this does not come back as a regression. Link: https://lore.kernel.org/172398528350.293426.8347220120333730248.stgit@devno… Acked-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- Changes since v2: https://lore.kernel.org/20241004145618.18436d7e@gandalf.local.home - Fixed grammar of comment .../ftrace/test.d/ftrace/fgraph-profiler.tc | 31 +++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/fgraph-profiler.tc diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-profiler.tc b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-profiler.tc new file mode 100644 index 000000000000..ffff8646733c --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-profiler.tc @@ -0,0 +1,31 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: ftrace - function profiler with function graph tracing +# requires: function_profile_enabled set_ftrace_filter function_graph:tracer + +# The function graph tracer can now be run along side of the function +# profiler. But there was a bug that caused the combination of the two +# to crash. It also required the function graph tracer to be started +# first. +# +# This test triggers that bug +# +# We need both function_graph and profiling to run this test + +fail() { # mesg + echo $1 + exit_fail +} + +echo "Enabling function graph tracer:" +echo function_graph > current_tracer +echo "enable profiler" + +# Older kernels do not allow function_profile to be enabled with +# function graph tracer. If the below fails, mark it as unsupported +echo 1 > function_profile_enabled || exit_unsupported + +# Let it run for a bit to make sure nothing explodes +sleep 1 + +exit 0 -- 2.45.2

8 months, 3 weeks

2
1
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[PATCH net-next v20 01/14] mm: page_frag: add a test module for page_frag

by Yunsheng Lin

The testing is done by ensuring that the fragment allocated from a frag_frag_cache instance is pushed into a ptr_ring instance in a kthread binded to a specified cpu, and a kthread binded to a specified cpu will pop the fragment from the ptr_ring and free the fragment. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- tools/testing/selftests/mm/Makefile | 3 + tools/testing/selftests/mm/page_frag/Makefile | 18 ++ .../selftests/mm/page_frag/page_frag_test.c | 173 ++++++++++++++++++ tools/testing/selftests/mm/run_vmtests.sh | 8 + tools/testing/selftests/mm/test_page_frag.sh | 171 +++++++++++++++++ 5 files changed, 373 insertions(+) create mode 100644 tools/testing/selftests/mm/page_frag/Makefile create mode 100644 tools/testing/selftests/mm/page_frag/page_frag_test.c create mode 100755 tools/testing/selftests/mm/test_page_frag.sh diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index 02e1204971b0..acec529baaca 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -36,6 +36,8 @@ MAKEFLAGS += --no-builtin-rules CFLAGS = -Wall -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES) LDLIBS = -lrt -lpthread -lm +TEST_GEN_MODS_DIR := page_frag + TEST_GEN_FILES = cow TEST_GEN_FILES += compaction_test TEST_GEN_FILES += gup_longterm @@ -126,6 +128,7 @@ TEST_FILES += test_hmm.sh TEST_FILES += va_high_addr_switch.sh TEST_FILES += charge_reserved_hugetlb.sh TEST_FILES += hugetlb_reparenting_test.sh +TEST_FILES += test_page_frag.sh # required by charge_reserved_hugetlb.sh TEST_FILES += write_hugetlb_memory.sh diff --git a/tools/testing/selftests/mm/page_frag/Makefile b/tools/testing/selftests/mm/page_frag/Makefile new file mode 100644 index 000000000000..58dda74d50a3 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/Makefile @@ -0,0 +1,18 @@ +PAGE_FRAG_TEST_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST))))) +KDIR ?= $(abspath $(PAGE_FRAG_TEST_DIR)/../../../../..) + +ifeq ($(V),1) +Q = +else +Q = @ +endif + +MODULES = page_frag_test.ko + +obj-m += page_frag_test.o + +all: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) modules + +clean: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) clean diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c new file mode 100644 index 000000000000..eeb2b6bc681a --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Test module for page_frag cache + * + * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> + */ + +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/cpumask.h> +#include <linux/completion.h> +#include <linux/ptr_ring.h> +#include <linux/kthread.h> + +static struct ptr_ring ptr_ring; +static int nr_objs = 512; +static atomic_t nthreads; +static struct completion wait; +static struct page_frag_cache test_nc; +static int test_popped; +static int test_pushed; + +static int nr_test = 2000000; +module_param(nr_test, int, 0); +MODULE_PARM_DESC(nr_test, "number of iterations to test"); + +static bool test_align; +module_param(test_align, bool, 0); +MODULE_PARM_DESC(test_align, "use align API for testing"); + +static int test_alloc_len = 2048; +module_param(test_alloc_len, int, 0); +MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); + +static int test_push_cpu; +module_param(test_push_cpu, int, 0); +MODULE_PARM_DESC(test_push_cpu, "test cpu for pushing fragment"); + +static int test_pop_cpu; +module_param(test_pop_cpu, int, 0); +MODULE_PARM_DESC(test_pop_cpu, "test cpu for popping fragment"); + +static int page_frag_pop_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag pop test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_popped < nr_test) { + void *obj = __ptr_ring_consume(ring); + + if (obj) { + test_popped++; + page_frag_free(obj); + } else { + cond_resched(); + } + } + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + pr_info("page_frag pop test thread exits on cpu %d\n", + smp_processor_id()); + + return 0; +} + +static int page_frag_push_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag push test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_pushed < nr_test) { + void *va; + int ret; + + if (test_align) { + va = page_frag_alloc_align(&test_nc, test_alloc_len, + GFP_KERNEL, SMP_CACHE_BYTES); + + WARN_ONCE((unsigned long)va & (SMP_CACHE_BYTES - 1), + "unaligned va returned\n"); + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } + + if (!va) + continue; + + ret = __ptr_ring_produce(ring, va); + if (ret) { + page_frag_free(va); + cond_resched(); + } else { + test_pushed++; + } + } + + pr_info("page_frag push test thread exits on cpu %d\n", + smp_processor_id()); + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + return 0; +} + +static int __init page_frag_test_init(void) +{ + struct task_struct *tsk_push, *tsk_pop; + ktime_t start; + u64 duration; + int ret; + + test_nc.va = NULL; + atomic_set(&nthreads, 2); + init_completion(&wait); + + if (test_alloc_len > PAGE_SIZE || test_alloc_len <= 0 || + !cpu_active(test_push_cpu) || !cpu_active(test_pop_cpu)) + return -EINVAL; + + ret = ptr_ring_init(&ptr_ring, nr_objs, GFP_KERNEL); + if (ret) + return ret; + + tsk_push = kthread_create_on_cpu(page_frag_push_thread, &ptr_ring, + test_push_cpu, "page_frag_push"); + if (IS_ERR(tsk_push)) + return PTR_ERR(tsk_push); + + tsk_pop = kthread_create_on_cpu(page_frag_pop_thread, &ptr_ring, + test_pop_cpu, "page_frag_pop"); + if (IS_ERR(tsk_pop)) { + kthread_stop(tsk_push); + return PTR_ERR(tsk_pop); + } + + start = ktime_get(); + wake_up_process(tsk_push); + wake_up_process(tsk_pop); + + pr_info("waiting for test to complete\n"); + + while (!wait_for_completion_timeout(&wait, msecs_to_jiffies(10000))) + pr_info("page_frag_test progress: pushed = %d, popped = %d\n", + test_pushed, test_popped); + + duration = (u64)ktime_us_delta(ktime_get(), start); + pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", duration); + + ptr_ring_cleanup(&ptr_ring, NULL); + page_frag_cache_drain(&test_nc); + + return -EAGAIN; +} + +static void __exit page_frag_test_exit(void) +{ +} + +module_init(page_frag_test_init); +module_exit(page_frag_test_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Yunsheng Lin <linyunsheng(a)huawei.com>"); +MODULE_DESCRIPTION("Test module for page_frag"); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index c5797ad1d37b..2c5394584af4 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -75,6 +75,8 @@ separated by spaces: read-only VMAs - mdwe test prctl(PR_SET_MDWE, ...) +- page_frag + test handling of page fragment allocation and freeing example: ./run_vmtests.sh -t "hmm mmap ksm" EOF @@ -456,6 +458,12 @@ CATEGORY="mkdirty" run_test ./mkdirty CATEGORY="mdwe" run_test ./mdwe_test +CATEGORY="page_frag" run_test ./test_page_frag.sh smoke + +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh new file mode 100755 index 000000000000..d750d910c899 --- /dev/null +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -0,0 +1,171 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> +# Copyright (C) 2018 Uladzislau Rezki (Sony) <urezki(a)gmail.com> +# +# This is a test script for the kernel test driver to test the +# correctness and performance of page_frag's implementation. +# Therefore it is just a kernel module loader. You can specify +# and pass different parameters in order to: +# a) analyse performance of page fragment allocations; +# b) stressing and stability check of page_frag subsystem. + +DRIVER="./page_frag/page_frag_test.ko" +CPU_LIST=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) +TEST_CPU_0=$(echo $CPU_LIST | awk '{print $1}') + +if [ $(echo $CPU_LIST | wc -w) -gt 1 ]; then + TEST_CPU_1=$(echo $CPU_LIST | awk '{print $2}') + NR_TEST=100000000 +else + TEST_CPU_1=$TEST_CPU_0 + NR_TEST=1000000 +fi + +# 1 if fails +exitcode=1 + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +# +# Static templates for testing of page_frag APIs. +# Also it is possible to pass any supported parameters manually. +# +SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" +NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" +ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" + +check_test_requirements() +{ + uid=$(id -u) + if [ $uid -ne 0 ]; then + echo "$0: Must be run as root" + exit $ksft_skip + fi + + if ! which insmod > /dev/null 2>&1; then + echo "$0: You need insmod installed" + exit $ksft_skip + fi + + if [ ! -f $DRIVER ]; then + echo "$0: You need to compile page_frag_test module" + exit $ksft_skip + fi +} + +run_nonaligned_check() +{ + echo "Run performance tests to evaluate how fast nonaligned alloc API is." + + insmod $DRIVER $NONALIGNED_PARAM > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +run_aligned_check() +{ + echo "Run performance tests to evaluate how fast aligned alloc API is." + + insmod $DRIVER $ALIGNED_PARAM > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +run_smoke_check() +{ + echo "Run smoke test." + + insmod $DRIVER $SMOKE_PARAM > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +usage() +{ + echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "manual parameters" + echo + echo "Valid tests and parameters:" + echo + modinfo $DRIVER + echo + echo "Example usage:" + echo + echo "# Shows help message" + echo "$0" + echo + echo "# Smoke testing" + echo "$0 smoke" + echo + echo "# Performance testing for nonaligned alloc API" + echo "$0 nonaligned" + echo + echo "# Performance testing for aligned alloc API" + echo "$0 aligned" + echo + exit 0 +} + +function validate_passed_args() +{ + VALID_ARGS=`modinfo $DRIVER | awk '/parm:/ {print $2}' | sed 's/:.*//'` + + # + # Something has been passed, check it. + # + for passed_arg in $@; do + key=${passed_arg//=*/} + valid=0 + + for valid_arg in $VALID_ARGS; do + if [[ $key = $valid_arg ]]; then + valid=1 + break + fi + done + + if [[ $valid -ne 1 ]]; then + echo "Error: key is not correct: ${key}" + exit $exitcode + fi + done +} + +function run_manual_check() +{ + # + # Validate passed parameters. If there is wrong one, + # the script exists and does not execute further. + # + validate_passed_args $@ + + echo "Run the test with following parameters: $@" + insmod $DRIVER $@ > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +function run_test() +{ + if [ $# -eq 0 ]; then + usage + else + if [[ "$1" = "smoke" ]]; then + run_smoke_check + elif [[ "$1" = "nonaligned" ]]; then + run_nonaligned_check + elif [[ "$1" = "aligned" ]]; then + run_aligned_check + else + run_manual_check $@ + fi + fi +} + +check_test_requirements +run_test $@ + +exit 0 -- 2.33.0

8 months, 3 weeks

2
3
0 0

[PATCH v2] ftrace/selftest: Test combination of function_graph tracer and function profiler

by Steven Rostedt

From: Steven Rostedt <rostedt(a)goodmis.org> Masami reported a bug when running function graph tracing then the function profiler. The following commands would cause a kernel crash: # cd /sys/kernel/tracing/ # echo function_graph > current_tracer # echo 1 > function_profile_enabled In that order. Create a test to test this two to make sure this does not come back as a regression. Link: https://lore.kernel.org/172398528350.293426.8347220120333730248.stgit@devno… Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- Changes since v1: https://lore.kernel.org/20240821150903.05c6cf96@gandalf.local.home - Added comment to why we are doing a sleep 1 - Now that the fix is in mainline, we can add this to the selftests .../ftrace/test.d/ftrace/fgraph-profiler.tc | 31 +++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/fgraph-profiler.tc diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-profiler.tc b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-profiler.tc new file mode 100644 index 000000000000..1580e4ef9739 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-profiler.tc @@ -0,0 +1,31 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: ftrace - function profiler with function graph tracing +# requires: function_profile_enabled set_ftrace_filter function_graph:tracer + +# The function graph tracer can now be run along side of the function +# profiler. But there was a bug that caused the combination of the two +# to crash. It also required the function graph tracer to be started +# first. +# +# This test triggers that bug +# +# We need function_graph and profiling to to run this test + +fail() { # mesg + echo $1 + exit_fail +} + +echo "Enabling function graph tracer:" +echo function_graph > current_tracer +echo "enable profiler" + +# Older kernels do not allow function_profile to be enabled with +# function graph tracer. If the below fails, mark it as unsupported +echo 1 > function_profile_enabled || exit_unsupported + +# Let it run for a bit to make sure nothing explodes +sleep 1 + +exit 0 -- 2.45.2

8 months, 3 weeks

3
4
0 0

[PATCH] selftests: net: rds: fix module not found

by Alessandro Zanni

This fix solves this error, when calling kselftest with targets "net/rds": selftests: net/rds: test.py Traceback (most recent call last): File "tools/testing/selftests/net/rds/./test.py", line 17, in <module> from lib.py import ip ModuleNotFoundError: No module named 'lib' Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- tools/testing/selftests/net/rds/test.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/rds/test.py b/tools/testing/selftests/net/rds/test.py index e6bb109bcead..112a8059c030 100755 --- a/tools/testing/selftests/net/rds/test.py +++ b/tools/testing/selftests/net/rds/test.py @@ -14,8 +14,9 @@ import sys import atexit from pwd import getpwuid from os import stat -from lib.py import ip +sys.path.append("..") +from lib.py.utils import ip libc = ctypes.cdll.LoadLibrary('libc.so.6') setns = libc.setns -- 2.43.0

8 months, 3 weeks

2
2
0 0

[PATCH] selftests/bpf: Removed redundant variable

by Zhu Jun

The error check is no longer needed for this test case, simplifying the code. Signed-off-by: Zhu Jun <zhujun2(a)cmss.chinamobile.com> --- tools/testing/selftests/bpf/prog_tests/signal_pending.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/signal_pending.c b/tools/testing/selftests/bpf/prog_tests/signal_pending.c index 70b49da5ca0a..8920fadb3aa9 100644 --- a/tools/testing/selftests/bpf/prog_tests/signal_pending.c +++ b/tools/testing/selftests/bpf/prog_tests/signal_pending.c @@ -36,7 +36,7 @@ static void test_signal_pending_by_type(enum bpf_prog_type prog_type) err = setitimer(ITIMER_REAL, &timeo, NULL); ASSERT_OK(err, "test-run-signal-timer"); - err = bpf_prog_test_run_opts(prog_fd, &topts); + bpf_prog_test_run_opts(prog_fd, &topts); ASSERT_LE(topts.duration, 500000000 /* 500ms */, "test-run-signal-duration"); -- 2.17.1

8 months, 3 weeks

2
1
0 0

[PATCH] selftests: drivers: net: fix name not defined

by Alessandro Zanni

This fix solves this error, when calling kselftest with targets "drivers/net": File "tools/testing/selftests/net/lib/py/nsim.py", line 64, in __init__ if e.errno == errno.ENOSPC: NameError: name 'errno' is not defined The module errno makes available standard error system symbols. Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- tools/testing/selftests/net/lib/py/nsim.py | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/net/lib/py/nsim.py b/tools/testing/selftests/net/lib/py/nsim.py index f571a8b3139b..1a8cbe9acc48 100644 --- a/tools/testing/selftests/net/lib/py/nsim.py +++ b/tools/testing/selftests/net/lib/py/nsim.py @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 +import errno import json import os import random -- 2.43.0

8 months, 3 weeks

3
3
0 0

[PATCH net-next v03 0/3] net: af_packet: allow joining a fanout when link is down

by Gur Stavi

PACKET socket can retain its fanout membership through link down and up and leave a fanout while closed regardless of link state. However, socket was forbidden from joining a fanout while it was not RUNNING. This scenario was identified while studying DPDK pmd_af_packet_drv. Since sockets are only created during initialization, there is no reason to fail the initialization if a single link is temporarily down. This patch allows PACKET socket to join a fanout while not RUNNING. Selftest psock_fanout is extended to test this "fanout while link down" scenario. Selftest psock_fanout is also extended to test fanout create/join by socket that did not bind or specified a protocol, which carries an implicit bind. This is the only test that was performed. Changes: V03: * psock_fanout: add test for joining fanout with unbound socket. * Test that socket can receive packets before adding it to a fanout match. This is kind of replaces the RUNNING test that was removed. * Initialize po->ifindex in packet_create. To -1 if no protocol is specified and add an explicit initialization to 0 if protocol is specified. * Refactor relevant code in fanout_add within bind_lock, as a sequence of if {} else if {}, in order to reduce indentation of nested if statements and provide specific error codes. V02: https://lore.kernel.org/netdev/cover.1728382839.git.gur.stavi@huawei.com * psock_fanout: use explicit loopback up/down instead of toggle. * psock_fanout: don't try to restore loopback state on failure. * Rephrase commit message about "leaving a fanout". V01: https://lore.kernel.org/netdev/cover.1728303615.git.gur.stavi@huawei.com/ Gur Stavi (3): af_packet: allow fanout_add when socket is not RUNNING selftests: net/psock_fanout: socket joins fanout when link is down selftests: net/psock_fanout: unbound socket fanout net/packet/af_packet.c | 35 ++++++---- tools/testing/selftests/net/psock_fanout.c | 78 +++++++++++++++++++++- 2 files changed, 96 insertions(+), 17 deletions(-) base-commit: 36efaca9cb28a893cad98f0448c39a8b698859e2 -- 2.45.2

8 months, 3 weeks

2
6
0 0

[PATCH bpf v1] selftests/bpf: Fix error compiling cgroup_ancestor.c with musl libc

by Tony Ambardar

Existing code calls connect() with a 'struct sockaddr_in6 *' argument where a 'struct sockaddr *' argument is declared, yielding compile errors when building for mips64el/musl-libc: In file included from cgroup_ancestor.c:3: cgroup_ancestor.c: In function 'send_datagram': cgroup_ancestor.c:38:38: error: passing argument 2 of 'connect' from incompatible pointer type [-Werror=incompatible-pointer-types] 38 | if (!ASSERT_OK(connect(sock, &addr, sizeof(addr)), "connect")) { | ^~~~~ | | | struct sockaddr_in6 * ./test_progs.h:343:29: note: in definition of macro 'ASSERT_OK' 343 | long long ___res = (res); \ | ^~~ In file included from .../netinet/in.h:10, from .../arpa/inet.h:9, from ./test_progs.h:17: .../sys/socket.h:386:19: note: expected 'const struct sockaddr *' but argument is of type 'struct sockaddr_in6 *' 386 | int connect (int, const struct sockaddr *, socklen_t); | ^~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors This only compiles because of a glibc extension allowing declaration of the argument as a "transparent union" which includes both types above. Explicitly cast the argument to allow compiling for both musl and glibc. Cc: Alexis Lothoré (eBPF Foundation) <alexis.lothore(a)bootlin.com> Fixes: f957c230e173 ("selftests/bpf: convert test_skb_cgroup_id_user to test_progs") Signed-off-by: Tony Ambardar <tony.ambardar(a)gmail.com> --- tools/testing/selftests/bpf/prog_tests/cgroup_ancestor.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/cgroup_ancestor.c b/tools/testing/selftests/bpf/prog_tests/cgroup_ancestor.c index 9250a1e9f9af..3f9ffdf71343 100644 --- a/tools/testing/selftests/bpf/prog_tests/cgroup_ancestor.c +++ b/tools/testing/selftests/bpf/prog_tests/cgroup_ancestor.c @@ -35,7 +35,7 @@ static int send_datagram(void) if (!ASSERT_OK_FD(sock, "create socket")) return sock; - if (!ASSERT_OK(connect(sock, &addr, sizeof(addr)), "connect")) { + if (!ASSERT_OK(connect(sock, (struct sockaddr *)&addr, sizeof(addr)), "connect")) { close(sock); return -1; } -- 2.34.1

8 months, 3 weeks

3
2
0 0

[PATCH bpf] bpf: fix unpopulated name_len field in perf_event link info

by tyrone-wu

Previously when retrieving `bpf_link_info.perf_event` for kprobe/uprobe/tracepoint, the `name_len` field was not populated by the kernel, leaving it to reflect the value initially set by the user. This behavior was inconsistent with how other input/output string buffer fields function (e.g. `raw_tracepoint.tp_name_len`). This patch fills `name_len` with the actual size of the string name. The relevant selftests have also been updated to assert that `name_len` contains the correct size rather than 0. Link: https://lore.kernel.org/bpf/CABVU1kXwQXhqQGe0RTrr7eegtM6SVW_KayZBy16-yb0Snz… Fixes: 1b715e1b0ec5 ("bpf: Support ->fill_link_info for perf_event") Signed-off-by: tyrone-wu <wudevelops(a)gmail.com> --- kernel/bpf/syscall.c | 25 +++++++++++++------ .../selftests/bpf/prog_tests/fill_link_info.c | 6 ++--- 2 files changed, 20 insertions(+), 11 deletions(-) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index a8f1808a1ca5..90b6add4d0c9 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -3565,7 +3565,7 @@ static void bpf_perf_link_dealloc(struct bpf_link *link) } static int bpf_perf_link_fill_common(const struct perf_event *event, - char __user *uname, u32 ulen, + char __user *uname, u32 *ulen, u64 *probe_offset, u64 *probe_addr, u32 *fd_type, unsigned long *missed) { @@ -3574,18 +3574,20 @@ static int bpf_perf_link_fill_common(const struct perf_event *event, size_t len; int err; - if (!ulen ^ !uname) + if (!(*ulen) ^ !uname) return -EINVAL; err = bpf_get_perf_event_info(event, &prog_id, fd_type, &buf, probe_offset, probe_addr, missed); if (err) return err; + + len = strlen(buf); + *ulen = len + 1; if (!uname) return 0; if (buf) { - len = strlen(buf); - err = bpf_copy_to_user(uname, buf, ulen, len); + err = bpf_copy_to_user(uname, buf, *ulen, len); if (err) return err; } else { @@ -3609,7 +3611,7 @@ static int bpf_perf_link_fill_kprobe(const struct perf_event *event, uname = u64_to_user_ptr(info->perf_event.kprobe.func_name); ulen = info->perf_event.kprobe.name_len; - err = bpf_perf_link_fill_common(event, uname, ulen, &offset, &addr, + err = bpf_perf_link_fill_common(event, uname, &ulen, &offset, &addr, &type, &missed); if (err) return err; @@ -3617,7 +3619,7 @@ static int bpf_perf_link_fill_kprobe(const struct perf_event *event, info->perf_event.type = BPF_PERF_EVENT_KRETPROBE; else info->perf_event.type = BPF_PERF_EVENT_KPROBE; - + info->perf_event.kprobe.name_len = ulen; info->perf_event.kprobe.offset = offset; info->perf_event.kprobe.missed = missed; if (!kallsyms_show_value(current_cred())) @@ -3639,7 +3641,7 @@ static int bpf_perf_link_fill_uprobe(const struct perf_event *event, uname = u64_to_user_ptr(info->perf_event.uprobe.file_name); ulen = info->perf_event.uprobe.name_len; - err = bpf_perf_link_fill_common(event, uname, ulen, &offset, &addr, + err = bpf_perf_link_fill_common(event, uname, &ulen, &offset, &addr, &type, NULL); if (err) return err; @@ -3648,6 +3650,7 @@ static int bpf_perf_link_fill_uprobe(const struct perf_event *event, info->perf_event.type = BPF_PERF_EVENT_URETPROBE; else info->perf_event.type = BPF_PERF_EVENT_UPROBE; + info->perf_event.uprobe.name_len = ulen; info->perf_event.uprobe.offset = offset; info->perf_event.uprobe.cookie = event->bpf_cookie; return 0; @@ -3673,12 +3676,18 @@ static int bpf_perf_link_fill_tracepoint(const struct perf_event *event, { char __user *uname; u32 ulen; + int err; uname = u64_to_user_ptr(info->perf_event.tracepoint.tp_name); ulen = info->perf_event.tracepoint.name_len; + err = bpf_perf_link_fill_common(event, uname, &ulen, NULL, NULL, NULL, NULL); + if (err) + return err; + info->perf_event.type = BPF_PERF_EVENT_TRACEPOINT; + info->perf_event.tracepoint.name_len = ulen; info->perf_event.tracepoint.cookie = event->bpf_cookie; - return bpf_perf_link_fill_common(event, uname, ulen, NULL, NULL, NULL, NULL); + return 0; } static int bpf_perf_link_fill_perf_event(const struct perf_event *event, diff --git a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c index f3932941bbaa..59077f260404 100644 --- a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c +++ b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c @@ -67,8 +67,8 @@ static int verify_perf_link_info(int fd, enum bpf_perf_event_type type, long add ASSERT_EQ(info.perf_event.kprobe.cookie, PERF_EVENT_COOKIE, "kprobe_cookie"); + ASSERT_EQ(info.perf_event.kprobe.name_len, strlen(KPROBE_FUNC) + 1, "name_len"); if (!info.perf_event.kprobe.func_name) { - ASSERT_EQ(info.perf_event.kprobe.name_len, 0, "name_len"); info.perf_event.kprobe.func_name = ptr_to_u64(&buf); info.perf_event.kprobe.name_len = sizeof(buf); goto again; @@ -79,8 +79,8 @@ static int verify_perf_link_info(int fd, enum bpf_perf_event_type type, long add ASSERT_EQ(err, 0, "cmp_kprobe_func_name"); break; case BPF_PERF_EVENT_TRACEPOINT: + ASSERT_EQ(info.perf_event.tracepoint.name_len, strlen(TP_NAME) + 1, "name_len"); if (!info.perf_event.tracepoint.tp_name) { - ASSERT_EQ(info.perf_event.tracepoint.name_len, 0, "name_len"); info.perf_event.tracepoint.tp_name = ptr_to_u64(&buf); info.perf_event.tracepoint.name_len = sizeof(buf); goto again; @@ -96,8 +96,8 @@ static int verify_perf_link_info(int fd, enum bpf_perf_event_type type, long add case BPF_PERF_EVENT_URETPROBE: ASSERT_EQ(info.perf_event.uprobe.offset, offset, "uprobe_offset"); + ASSERT_EQ(info.perf_event.uprobe.name_len, strlen(UPROBE_FILE) + 1, "name_len"); if (!info.perf_event.uprobe.file_name) { - ASSERT_EQ(info.perf_event.uprobe.name_len, 0, "name_len"); info.perf_event.uprobe.file_name = ptr_to_u64(&buf); info.perf_event.uprobe.name_len = sizeof(buf); goto again; -- 2.43.0

8 months, 3 weeks

6
19
0 0

kselftest/fixes kselftest-cpufreq: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-5-gdc7da277516a0)

by kernelci.org bot

kselftest/fixes kselftest-cpufreq: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-5-gdc7da277516a0) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------+-------+-------------+----------+---------------------+------------ sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-cpufreq Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc2-5-gdc7da277516a0 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: dc7da277516a0f22fcb4ae904c4ce0083ae0b9ff Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------+-------+-------------+----------+---------------------+------------ sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/670709178965018b0ac868b0 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/670709178965018b0ac868b1 failing since 0 day (last pass: v6.12-rc1-5-g45a8897db67d4, first fail: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

8 months, 3 weeks

1
0
0 0

kselftest/fixes build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-fixes-6.12-rc2-5-gdc7da277516a0)

by kernelci.org bot

kselftest/fixes build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-fixes-6.12-rc2-5-gdc7da277516a0) Full Build Summary: https://kernelci.org/build/kselftest/branch/fixes/kernel/linux_kselftest-fi… Tree: kselftest Branch: fixes Git Describe: linux_kselftest-fixes-6.12-rc2-5-gdc7da277516a0 Git Commit: dc7da277516a0f22fcb4ae904c4ce0083ae0b9ff Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

8 months, 3 weeks

1
0
0 0

[PATCH 1/1] selftests/rseq: Fix mm_cid test failure

by Mathieu Desnoyers

Adapt the rseq.c/rseq.h code to follow GNU C library changes introduced by: glibc commit 2e456ccf0c34 ("Linux: Make __rseq_size useful for feature detection (bug 31965)") Without this fix, rseq selftests for mm_cid fail: ./run_param_test.sh Default parameters Running test spinlock Running compare-twice test spinlock Running mm_cid test spinlock Error: cpu id getter unavailable [ This is based on the following branch: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git branch: fixes ] Fixes: 18c2355838e7 ("selftests/rseq: Implement rseq mm_cid field support") Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Cc: Peter Zijlstra <peterz(a)infradead.org> CC: Boqun Feng <boqun.feng(a)gmail.com> CC: "Paul E. McKenney" <paulmck(a)kernel.org> Cc: Shuah Khan <skhan(a)linuxfoundation.org> CC: Carlos O'Donell <carlos(a)redhat.com> CC: Florian Weimer <fweimer(a)redhat.com> CC: linux-kselftest(a)vger.kernel.org CC: stable(a)vger.kernel.org --- tools/testing/selftests/rseq/rseq.c | 110 +++++++++++++++++++--------- tools/testing/selftests/rseq/rseq.h | 10 +-- 2 files changed, 77 insertions(+), 43 deletions(-) diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c index 96e812bdf8a4..5b9772cdf265 100644 --- a/tools/testing/selftests/rseq/rseq.c +++ b/tools/testing/selftests/rseq/rseq.c @@ -60,12 +60,6 @@ unsigned int rseq_size = -1U; /* Flags used during rseq registration. */ unsigned int rseq_flags; -/* - * rseq feature size supported by the kernel. 0 if the registration was - * unsuccessful. - */ -unsigned int rseq_feature_size = -1U; - static int rseq_ownership; static int rseq_reg_success; /* At least one rseq registration has succeded. */ @@ -111,6 +105,43 @@ int rseq_available(void) } } +/* The rseq areas need to be at least 32 bytes. */ +static +unsigned int get_rseq_min_alloc_size(void) +{ + unsigned int alloc_size = rseq_size; + + if (alloc_size < ORIG_RSEQ_ALLOC_SIZE) + alloc_size = ORIG_RSEQ_ALLOC_SIZE; + return alloc_size; +} + +/* + * Return the feature size supported by the kernel. + * + * Depending on the value returned by getauxval(AT_RSEQ_FEATURE_SIZE): + * + * 0: Return ORIG_RSEQ_FEATURE_SIZE (20) + * > 0: Return the value from getauxval(AT_RSEQ_FEATURE_SIZE). + * + * It should never return a value below ORIG_RSEQ_FEATURE_SIZE. + */ +static +unsigned int get_rseq_kernel_feature_size(void) +{ + unsigned long auxv_rseq_feature_size, auxv_rseq_align; + + auxv_rseq_align = getauxval(AT_RSEQ_ALIGN); + assert(!auxv_rseq_align || auxv_rseq_align <= RSEQ_THREAD_AREA_ALLOC_SIZE); + + auxv_rseq_feature_size = getauxval(AT_RSEQ_FEATURE_SIZE); + assert(!auxv_rseq_feature_size || auxv_rseq_feature_size <= RSEQ_THREAD_AREA_ALLOC_SIZE); + if (auxv_rseq_feature_size) + return auxv_rseq_feature_size; + else + return ORIG_RSEQ_FEATURE_SIZE; +} + int rseq_register_current_thread(void) { int rc; @@ -119,7 +150,7 @@ int rseq_register_current_thread(void) /* Treat libc's ownership as a successful registration. */ return 0; } - rc = sys_rseq(&__rseq_abi, rseq_size, 0, RSEQ_SIG); + rc = sys_rseq(&__rseq_abi, get_rseq_min_alloc_size(), 0, RSEQ_SIG); if (rc) { if (RSEQ_READ_ONCE(rseq_reg_success)) { /* Incoherent success/failure within process. */ @@ -140,28 +171,12 @@ int rseq_unregister_current_thread(void) /* Treat libc's ownership as a successful unregistration. */ return 0; } - rc = sys_rseq(&__rseq_abi, rseq_size, RSEQ_ABI_FLAG_UNREGISTER, RSEQ_SIG); + rc = sys_rseq(&__rseq_abi, get_rseq_min_alloc_size(), RSEQ_ABI_FLAG_UNREGISTER, RSEQ_SIG); if (rc) return -1; return 0; } -static -unsigned int get_rseq_feature_size(void) -{ - unsigned long auxv_rseq_feature_size, auxv_rseq_align; - - auxv_rseq_align = getauxval(AT_RSEQ_ALIGN); - assert(!auxv_rseq_align || auxv_rseq_align <= RSEQ_THREAD_AREA_ALLOC_SIZE); - - auxv_rseq_feature_size = getauxval(AT_RSEQ_FEATURE_SIZE); - assert(!auxv_rseq_feature_size || auxv_rseq_feature_size <= RSEQ_THREAD_AREA_ALLOC_SIZE); - if (auxv_rseq_feature_size) - return auxv_rseq_feature_size; - else - return ORIG_RSEQ_FEATURE_SIZE; -} - static __attribute__((constructor)) void rseq_init(void) { @@ -178,28 +193,54 @@ void rseq_init(void) } if (libc_rseq_size_p && libc_rseq_offset_p && libc_rseq_flags_p && *libc_rseq_size_p != 0) { + unsigned int libc_rseq_size; + /* rseq registration owned by glibc */ rseq_offset = *libc_rseq_offset_p; - rseq_size = *libc_rseq_size_p; + libc_rseq_size = *libc_rseq_size_p; rseq_flags = *libc_rseq_flags_p; - rseq_feature_size = get_rseq_feature_size(); - if (rseq_feature_size > rseq_size) - rseq_feature_size = rseq_size; + + /* + * Previous versions of glibc expose the value + * 32 even though the kernel only supported 20 + * bytes initially. Therefore treat 32 as a + * special-case. glibc 2.40 exposes a 20 bytes + * __rseq_size without using getauxval(3) to + * query the supported size, while still allocating a 32 + * bytes area. Also treat 20 as a special-case. + * + * Special-cases are handled by using the following + * value as active feature set size: + * + * rseq_size = min(32, get_rseq_kernel_feature_size()) + */ + switch (libc_rseq_size) { + case ORIG_RSEQ_FEATURE_SIZE: + fallthrough; + case ORIG_RSEQ_ALLOC_SIZE: + { + unsigned int rseq_kernel_feature_size = get_rseq_kernel_feature_size(); + + if (rseq_kernel_feature_size < ORIG_RSEQ_ALLOC_SIZE) + rseq_size = rseq_kernel_feature_size; + else + rseq_size = ORIG_RSEQ_ALLOC_SIZE; + break; + } + default: + /* Otherwise just use the __rseq_size from libc as rseq_size. */ + rseq_size = libc_rseq_size; + break; + } return; } rseq_ownership = 1; if (!rseq_available()) { rseq_size = 0; - rseq_feature_size = 0; return; } rseq_offset = (void *)&__rseq_abi - rseq_thread_pointer(); rseq_flags = 0; - rseq_feature_size = get_rseq_feature_size(); - if (rseq_feature_size == ORIG_RSEQ_FEATURE_SIZE) - rseq_size = ORIG_RSEQ_ALLOC_SIZE; - else - rseq_size = RSEQ_THREAD_AREA_ALLOC_SIZE; } static __attribute__((destructor)) @@ -209,7 +250,6 @@ void rseq_exit(void) return; rseq_offset = 0; rseq_size = -1U; - rseq_feature_size = -1U; rseq_ownership = 0; } diff --git a/tools/testing/selftests/rseq/rseq.h b/tools/testing/selftests/rseq/rseq.h index d7364ea4d201..4e217b620e0c 100644 --- a/tools/testing/selftests/rseq/rseq.h +++ b/tools/testing/selftests/rseq/rseq.h @@ -68,12 +68,6 @@ extern unsigned int rseq_size; /* Flags used during rseq registration. */ extern unsigned int rseq_flags; -/* - * rseq feature size supported by the kernel. 0 if the registration was - * unsuccessful. - */ -extern unsigned int rseq_feature_size; - enum rseq_mo { RSEQ_MO_RELAXED = 0, RSEQ_MO_CONSUME = 1, /* Unused */ @@ -193,7 +187,7 @@ static inline uint32_t rseq_current_cpu(void) static inline bool rseq_node_id_available(void) { - return (int) rseq_feature_size >= rseq_offsetofend(struct rseq_abi, node_id); + return (int) rseq_size >= rseq_offsetofend(struct rseq_abi, node_id); } /* @@ -207,7 +201,7 @@ static inline uint32_t rseq_current_node_id(void) static inline bool rseq_mm_cid_available(void) { - return (int) rseq_feature_size >= rseq_offsetofend(struct rseq_abi, mm_cid); + return (int) rseq_size >= rseq_offsetofend(struct rseq_abi, mm_cid); } static inline uint32_t rseq_current_mm_cid(void) -- 2.39.2

8 months, 3 weeks

2
1
0 0

[PATCH v8 0/8] clk: Add kunit tests for fixed rate and parent data

by Stephen Boyd

This patch series adds unit tests for the clk fixed rate basic type and the clk registration functions that use struct clk_parent_data. To get there, we add support for loading device tree overlays onto the live DTB along with probing platform drivers to bind to device nodes in the overlays. With this series, we're able to exercise some of the code in the common clk framework that uses devicetree lookups to find parents and the fixed rate clk code that scans device tree directly and creates clks. Please review. I Cced everyone to all the patches so they get the full context. I'm hoping I can take the whole pile through the clk tree as they all build upon each other. Or the DT part can be merged through the DT tree to reduce the dependencies. Changes from v7: https://lore.kernel.org/r/20240710201246.1802189-1-sboyd@kernel.org * Support modular builds properly by compiling overlay with tests into one .ko * Fold in thinko fix from Geert to DT overlay application patch * Export device_is_bound() to fix module build * Add more module license and description Changes from v6: https://lore.kernel.org/r/20240706045454.215701-1-sboyd@kernel.org * Fix kasan error in platform test by fixing the condition to check for correct free callback * Add module descriptions to new modules Changes from v5: https://lore.kernel.org/r/20240603223811.3815762-1-sboyd@kernel.org * Pick up reviewed-by tags * Drop test vendor prefix bindings as dtschema allows anything now * Use of_node_put_kunit() more to plug some reference leaks * Select DTC config to avoid compile fails because of missing dtc * Don't skip for OF_OVERLAY in overlay tests because they depend on it Changes from v4: https://lore.kernel.org/r/20240422232404.213174-1-sboyd@kernel.org * Picked up reviewed-by tags * Check for non-NULL device pointers before calling put_device() * Fix CFI issues with kunit actions * Introduce platform_device_prepare_wait_for_probe() helper to wait for a platform device to probe * Move platform code to lib/kunit and rename functions to have kunit prefix * Fix issue with platform wrappers messing up reference counting because they used kunit actions * New patch to populate overlay devices on root node for powerpc * Make fixed-rate binding generic single clk consumer binding Changes from v3: https://lore.kernel.org/r/20230327222159.3509818-1-sboyd@kernel.org * No longer depend on Frank's series[1] because it was merged upstream[2] * Use kunit_add_action_or_reset() to shorten code * Skip tests properly when CONFIG_OF_OVERLAY isn't set Changes from v2: https://lore.kernel.org/r/20230315183729.2376178-1-sboyd@kernel.org * Overlays don't depend on __symbols__ node * Depend on Frank's always create root node if CONFIG_OF series[1] * Added kernel-doc to KUnit API doc * Fixed some kernel-doc on functions * More test cases for fixed rate clk Changes from v1: https://lore.kernel.org/r/20230302013822.1808711-1-sboyd@kernel.org * Don't depend on UML, use unittest data approach to attach nodes * Introduce overlay loading API for KUnit * Move platform_device KUnit code to drivers/base/test * Use #define macros for constants shared between unit tests and overlays * Settle on "test" as a vendor prefix * Make KUnit wrappers have "_kunit" postfix [1] https://lore.kernel.org/r/20230317053415.2254616-1-frowand.list@gmail.com [2] https://lore.kernel.org/r/20240308195737.GA1174908-robh@kernel.org Stephen Boyd (8): of/platform: Allow overlays to create platform devices from the root node of: Add test managed wrappers for of_overlay_apply()/of_node_put() dt-bindings: vendor-prefixes: Add "test" vendor for KUnit and friends of: Add a KUnit test for overlays and test managed APIs platform: Add test managed platform_device/driver APIs clk: Add test managed clk provider/consumer APIs clk: Add KUnit tests for clk fixed rate basic type clk: Add KUnit tests for clks registered with struct clk_parent_data Documentation/dev-tools/kunit/api/clk.rst | 10 + Documentation/dev-tools/kunit/api/index.rst | 21 + Documentation/dev-tools/kunit/api/of.rst | 13 + .../dev-tools/kunit/api/platformdevice.rst | 10 + .../devicetree/bindings/vendor-prefixes.yaml | 2 + drivers/base/dd.c | 1 + drivers/clk/.kunitconfig | 2 + drivers/clk/Kconfig | 11 + drivers/clk/Makefile | 11 +- drivers/clk/clk-fixed-rate_test.c | 380 +++++++++++++++ drivers/clk/clk-fixed-rate_test.h | 8 + drivers/clk/clk_kunit_helpers.c | 207 ++++++++ drivers/clk/clk_parent_data_test.h | 10 + drivers/clk/clk_test.c | 453 +++++++++++++++++- drivers/clk/kunit_clk_fixed_rate_test.dtso | 19 + drivers/clk/kunit_clk_parent_data_test.dtso | 28 ++ drivers/of/.kunitconfig | 1 + drivers/of/Kconfig | 10 + drivers/of/Makefile | 3 + drivers/of/kunit_overlay_test.dtso | 9 + drivers/of/of_kunit_helpers.c | 77 +++ drivers/of/overlay_test.c | 115 +++++ drivers/of/platform.c | 9 +- include/kunit/clk.h | 28 ++ include/kunit/of.h | 115 +++++ include/kunit/platform_device.h | 20 + lib/kunit/Makefile | 4 +- lib/kunit/platform-test.c | 224 +++++++++ lib/kunit/platform.c | 302 ++++++++++++ 29 files changed, 2097 insertions(+), 6 deletions(-) create mode 100644 Documentation/dev-tools/kunit/api/clk.rst create mode 100644 Documentation/dev-tools/kunit/api/of.rst create mode 100644 Documentation/dev-tools/kunit/api/platformdevice.rst create mode 100644 drivers/clk/clk-fixed-rate_test.c create mode 100644 drivers/clk/clk-fixed-rate_test.h create mode 100644 drivers/clk/clk_kunit_helpers.c create mode 100644 drivers/clk/clk_parent_data_test.h create mode 100644 drivers/clk/kunit_clk_fixed_rate_test.dtso create mode 100644 drivers/clk/kunit_clk_parent_data_test.dtso create mode 100644 drivers/of/kunit_overlay_test.dtso create mode 100644 drivers/of/of_kunit_helpers.c create mode 100644 drivers/of/overlay_test.c create mode 100644 include/kunit/clk.h create mode 100644 include/kunit/of.h create mode 100644 include/kunit/platform_device.h create mode 100644 lib/kunit/platform-test.c create mode 100644 lib/kunit/platform.c base-commit: 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0 -- https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/ https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git

8 months, 3 weeks

3
33
0 0

[PATCH v3] selftests: sched_ext: Add sched_ext as proper selftest target

by Björn Töpel

From: Björn Töpel <bjorn(a)rivosinc.com> The sched_ext selftests is missing proper cross-compilation support, a proper target entry, and out-of-tree build support. When building the kselftest suite, e.g.: make ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu- \ TARGETS=sched_ext SKIP_TARGETS="" O=/output/foo \ -C tools/testing/selftests install or: make ARCH=arm64 LLVM=1 TARGETS=sched_ext SKIP_TARGETS="" \ O=/output/foo -C tools/testing/selftests install The expectation is that the sched_ext is included, cross-built, the correct toolchain is picked up, and placed into /output/foo. In contrast to the BPF selftests, the sched_ext suite does not use bpftool at test run-time, so it is sufficient to build bpftool for the build host only. Add ARCH, CROSS_COMPILE, OUTPUT, and TARGETS support to the sched_ext selftest. Also, remove some variables that were unused by the Makefile. Signed-off-by: Björn Töpel <bjorn(a)rivosinc.com> --- v3: * Always build a build host version of bpftool (Mark) * Make sure LLVM style "ARCH only" cross-build works (Mark) v2: * Removed the duplicated LLVM prefix parsing (David) * Made sure make clean didn't do a complete mess (David) * Added sched_ext to default skip (Shuah) --- tools/testing/selftests/Makefile | 9 +-- tools/testing/selftests/sched_ext/Makefile | 73 ++++++++++------------ 2 files changed, 38 insertions(+), 44 deletions(-) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..363d031a16f7 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -88,6 +88,7 @@ TARGETS += rlimits TARGETS += rseq TARGETS += rtc TARGETS += rust +TARGETS += sched_ext TARGETS += seccomp TARGETS += sgx TARGETS += sigaltstack @@ -129,10 +130,10 @@ ifeq ($(filter net/lib,$(TARGETS)),) endif endif -# User can optionally provide a TARGETS skiplist. By default we skip -# BPF since it has cutting edge build time dependencies which require -# more effort to install. -SKIP_TARGETS ?= bpf +# User can optionally provide a TARGETS skiplist. By default we skip +# targets using BPF since it has cutting edge build time dependencies +# which require more effort to install. +SKIP_TARGETS ?= bpf sched_ext ifneq ($(SKIP_TARGETS),) TMP := $(filter-out $(SKIP_TARGETS), $(TARGETS)) override TARGETS := $(TMP) diff --git a/tools/testing/selftests/sched_ext/Makefile b/tools/testing/selftests/sched_ext/Makefile index 0754a2c110a1..06ae9c107049 100644 --- a/tools/testing/selftests/sched_ext/Makefile +++ b/tools/testing/selftests/sched_ext/Makefile @@ -3,24 +3,13 @@ include ../../../build/Build.include include ../../../scripts/Makefile.arch include ../../../scripts/Makefile.include + +TEST_GEN_PROGS := runner + +# override lib.mk's default rules +OVERRIDE_TARGETS := 1 include ../lib.mk -ifneq ($(LLVM),) -ifneq ($(filter %/,$(LLVM)),) -LLVM_PREFIX := $(LLVM) -else ifneq ($(filter -%,$(LLVM)),) -LLVM_SUFFIX := $(LLVM) -endif - -CC := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) $(CLANG_FLAGS) -fintegrated-as -else -CC := gcc -endif # LLVM - -ifneq ($(CROSS_COMPILE),) -$(error CROSS_COMPILE not supported for scx selftests) -endif # CROSS_COMPILE - CURDIR := $(abspath .) REPOROOT := $(abspath ../../../..) TOOLSDIR := $(REPOROOT)/tools @@ -34,18 +23,23 @@ GENHDR := $(GENDIR)/autoconf.h SCXTOOLSDIR := $(TOOLSDIR)/sched_ext SCXTOOLSINCDIR := $(TOOLSDIR)/sched_ext/include -OUTPUT_DIR := $(CURDIR)/build +OUTPUT_DIR := $(OUTPUT)/build OBJ_DIR := $(OUTPUT_DIR)/obj INCLUDE_DIR := $(OUTPUT_DIR)/include BPFOBJ_DIR := $(OBJ_DIR)/libbpf SCXOBJ_DIR := $(OBJ_DIR)/sched_ext BPFOBJ := $(BPFOBJ_DIR)/libbpf.a LIBBPF_OUTPUT := $(OBJ_DIR)/libbpf/libbpf.a -DEFAULT_BPFTOOL := $(OUTPUT_DIR)/sbin/bpftool -HOST_BUILD_DIR := $(OBJ_DIR) -HOST_OUTPUT_DIR := $(OUTPUT_DIR) -VMLINUX_BTF_PATHS ?= ../../../../vmlinux \ +DEFAULT_BPFTOOL := $(OUTPUT_DIR)/host/sbin/bpftool +HOST_OBJ_DIR := $(OBJ_DIR)/host/bpftool +HOST_LIBBPF_OUTPUT := $(OBJ_DIR)/host/libbpf/ +HOST_LIBBPF_DESTDIR := $(OUTPUT_DIR)/host/ +HOST_DESTDIR := $(OUTPUT_DIR)/host/ + +VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ + $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ + ../../../../vmlinux \ /sys/kernel/btf/vmlinux \ /boot/vmlinux-$(shell uname -r) VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) @@ -80,17 +74,23 @@ IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \ # Use '-idirafter': Don't interfere with include mechanics except where the # build would have failed anyways. define get_sys_includes -$(shell $(1) -v -E - </dev/null 2>&1 \ +$(shell $(1) $(2) -v -E - </dev/null 2>&1 \ | sed -n '/<...> search starts here:/,/End of search list./{ s| $/.*$|-idirafter \1|p }') \ -$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') +$(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') endef +ifneq ($(CROSS_COMPILE),) +CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%)) +endif + +CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH)) + BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) \ $(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) \ -I$(CURDIR)/include -I$(CURDIR)/include/bpf-compat \ -I$(INCLUDE_DIR) -I$(APIDIR) -I$(SCXTOOLSINCDIR) \ -I$(REPOROOT)/include \ - $(call get_sys_includes,$(CLANG)) \ + $(CLANG_SYS_INCLUDES) \ -Wall -Wno-compare-distinct-pointer-types \ -Wno-incompatible-function-pointer-types \ -O2 -mcpu=v3 @@ -98,7 +98,7 @@ BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) \ # sort removes libbpf duplicates when not cross-building MAKE_DIRS := $(sort $(OBJ_DIR)/libbpf $(OBJ_DIR)/libbpf \ $(OBJ_DIR)/bpftool $(OBJ_DIR)/resolve_btfids \ - $(INCLUDE_DIR) $(SCXOBJ_DIR)) + $(HOST_OBJ_DIR) $(INCLUDE_DIR) $(SCXOBJ_DIR)) $(MAKE_DIRS): $(call msg,MKDIR,,$@) @@ -108,18 +108,19 @@ $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ $(APIDIR)/linux/bpf.h \ | $(OBJ_DIR)/libbpf $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(OBJ_DIR)/libbpf/ \ + ARCH=$(ARCH) CC="$(CC)" CROSS_COMPILE=$(CROSS_COMPILE) \ EXTRA_CFLAGS='-g -O0 -fPIC' \ DESTDIR=$(OUTPUT_DIR) prefix= all install_headers $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ - $(LIBBPF_OUTPUT) | $(OBJ_DIR)/bpftool + $(LIBBPF_OUTPUT) | $(HOST_OBJ_DIR) $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \ EXTRA_CFLAGS='-g -O0' \ - OUTPUT=$(OBJ_DIR)/bpftool/ \ - LIBBPF_OUTPUT=$(OBJ_DIR)/libbpf/ \ - LIBBPF_DESTDIR=$(OUTPUT_DIR)/ \ - prefix= DESTDIR=$(OUTPUT_DIR)/ install-bin + OUTPUT=$(HOST_OBJ_DIR)/ \ + LIBBPF_OUTPUT=$(HOST_LIBBPF_OUTPUT) \ + LIBBPF_DESTDIR=$(HOST_LIBBPF_DESTDIR) \ + prefix= DESTDIR=$(HOST_DESTDIR) install-bin $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR) ifeq ($(VMLINUX_H),) @@ -150,9 +151,7 @@ $(INCLUDE_DIR)/%.bpf.skel.h: $(SCXOBJ_DIR)/%.bpf.o $(INCLUDE_DIR)/vmlinux.h $(BP override define CLEAN rm -rf $(OUTPUT_DIR) - rm -f *.o *.bpf.o *.bpf.skel.h *.bpf.subskel.h rm -f $(TEST_GEN_PROGS) - rm -f runner endef # Every testcase takes all of the BPF progs are dependencies by default. This @@ -196,21 +195,15 @@ $(SCXOBJ_DIR)/runner.o: runner.c | $(SCXOBJ_DIR) # function doesn't support using implicit rules otherwise. $(testcase-targets): $(SCXOBJ_DIR)/%.o: %.c $(SCXOBJ_DIR)/runner.o $(all_test_bpfprogs) | $(SCXOBJ_DIR) $(eval test=$(patsubst %.o,%.c,$(notdir $@))) - $(CC) $(CFLAGS) -c $< -o $@ $(SCXOBJ_DIR)/runner.o + $(CC) $(CFLAGS) -c $< -o $@ $(SCXOBJ_DIR)/util.o: util.c | $(SCXOBJ_DIR) $(CC) $(CFLAGS) -c $< -o $@ -runner: $(SCXOBJ_DIR)/runner.o $(SCXOBJ_DIR)/util.o $(BPFOBJ) $(testcase-targets) +$(OUTPUT)/runner: $(SCXOBJ_DIR)/runner.o $(SCXOBJ_DIR)/util.o $(BPFOBJ) $(testcase-targets) @echo "$(testcase-targets)" $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) -TEST_GEN_PROGS := runner - -all: runner - -.PHONY: all clean help - .DEFAULT_GOAL := all .DELETE_ON_ERROR: base-commit: 87d6aab2389e5ce0197d8257d5f8ee965a67c4cd -- 2.43.0

8 months, 3 weeks

5
4
0 0

[PATCH v5 0/4] selftests: kvm: s390: Add ucontrol memory selftests

by Christoph Schlameuss

This patch series adds a some not yet picked selftests to the kvm s390x selftest suite. The additional test cases are covering: * Assert KVM_EXIT_S390_UCONTROL exit on not mapped memory access * Assert functionality of storage keys in ucontrol VM * Assert that memory region operations are rejected for ucontrol VMs Running the test cases requires sys_admin capabilities to start the ucontrol VM. This can be achieved by running as root or with a command like: sudo setpriv --reuid nobody --inh-caps -all,+sys_admin \ --ambient-caps -all,+sys_admin --bounding-set -all,+sys_admin \ ./ucontrol_test --- The patches in this series have been part of the previous patch series. The test cases added here do depend on the fixture added in the earlier patches. From v5 PATCH 7-9 the segment and page table generation has been removed and DAT has been disabled. Since DAT is not necessary to validate the KVM code. https://lore.kernel.org/kvm/20240807154512.316936-1-schlameuss@linux.ibm.co… v5: - rebased to current upstream master - corrected assertion on 0x00 to 0 - reworded fixup commit so that it can be merged on top of current upstream v4: - fix whitespaces in pointer function arguments (thanks Claudio) - fix whitespaces in comments (thanks Janosch) v3: - fix skey assertion (thanks Claudio) - introduce a wrapper around UCAS map and unmap ioctls to improve readability (Claudio) - add an displacement to accessed memory to assert translation intercepts actually point to segments to the uc_map_unmap test - add an misaligned failing mapping try to the uc_map_unmap test v2: - Reenable KSS intercept and handle it within skey test. - Modify the checked register between storing (sske) and reading (iske) it within the test program to make sure the. - Add an additional state assertion in the end of uc_skey - Fix some typos and white spaces. v1: - Remove segment and page table generation and disable DAT. This is not necessary to validate the KVM code. Christoph Schlameuss (4): selftests: kvm: s390: Add uc_map_unmap VM test case selftests: kvm: s390: Add uc_skey VM test case selftests: kvm: s390: Verify reject memory region operations for ucontrol VMs selftests: kvm: s390: Fix whitespace confusion in ucontrol test .../selftests/kvm/s390x/ucontrol_test.c | 262 +++++++++++++++++- 1 file changed, 257 insertions(+), 5 deletions(-) base-commit: 87d6aab2389e5ce0197d8257d5f8ee965a67c4cd -- 2.46.2

8 months, 3 weeks

2
8
0 0

[PATCH] selftest: hid: add the missing tests directory

by Yun Lu

Commit 160c826b4dd0 ("selftest: hid: add missing run-hid-tools-tests.sh") has added the run-hid-tools-tests.sh script for it to be installed, but I forgot to add the tests directory together. In fact, the run-hid-tools-tests.sh script uses the scripts in the tests directory to run tests. The tests directory also needs to be added to be installed. Fixes: ffb85d5c9e80 ("selftests: hid: import hid-tools hid-core tests") Cc: stable(a)vger.kernel.org Signed-off-by: Yun Lu <luyun(a)kylinos.cn> --- tools/testing/selftests/hid/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile index 38ae31bb07b5..662209f5fabc 100644 --- a/tools/testing/selftests/hid/Makefile +++ b/tools/testing/selftests/hid/Makefile @@ -18,6 +18,7 @@ TEST_PROGS += hid-usb_crash.sh TEST_PROGS += hid-wacom.sh TEST_FILES := run-hid-tools-tests.sh +TEST_FILES += tests CXX ?= $(CROSS_COMPILE)g++ -- 2.27.0

8 months, 3 weeks

3
2
0 0

kselftest/fixes kselftest-seccomp: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

by kernelci.org bot

kselftest/fixes kselftest-seccomp: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-seccomp Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 34d5b600172b846161e507bdce132c98d9cc9701 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6705c93503f7c09e74c86855 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-seccomp.login: https://kernelci.org/test/case/id/6705c93503f7c09e74c86856 new failure (last pass: v6.12-rc1-5-g45a8897db67d4)

8 months, 3 weeks

1
0
0 0

kselftest/fixes kselftest-cpufreq: 4 runs, 3 regressions (linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

by kernelci.org bot

kselftest/fixes kselftest-cpufreq: 4 runs, 3 regressions (linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 sun50i-h5-lib...ch-all-h3-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-cpufreq Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 34d5b600172b846161e507bdce132c98d9cc9701 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6705caba4e0aebd8f2c8685d Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/6705caba4e0aebd8f2c8685e new failure (last pass: v6.12-rc1-5-g45a8897db67d4) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6705cbeeebba5fb735c86855 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/6705cbeeebba5fb735c86856 new failure (last pass: v6.12-rc1-5-g45a8897db67d4) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ sun50i-h5-lib...ch-all-h3-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6705c966be664b4cfcc86855 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/6705c966be664b4cfcc86856 new failure (last pass: v6.12-rc1-5-g45a8897db67d4)

8 months, 3 weeks

1
0
0 0

kselftest/fixes kselftest-lib: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

by kernelci.org bot

kselftest/fixes kselftest-lib: 2 runs, 1 regressions (linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/fixes/kernel/linux_kselftest… Test: kselftest-lib Tree: kselftest Branch: fixes Describe: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 34d5b600172b846161e507bdce132c98d9cc9701 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+-------------+----------+---------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-12 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6705ca86b150574743c86855 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-12 (aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… HTML log: https://storage.kernelci.org//kselftest/fixes/linux_kselftest-fixes-6.12-rc… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lib.login: https://kernelci.org/test/case/id/6705ca86b150574743c86856 new failure (last pass: v6.12-rc1-5-g45a8897db67d4)

8 months, 3 weeks

1
0
0 0

kselftest/fixes build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b)

by kernelci.org bot

kselftest/fixes build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b) Full Build Summary: https://kernelci.org/build/kselftest/branch/fixes/kernel/linux_kselftest-fi… Tree: kselftest Branch: fixes Git Describe: linux_kselftest-fixes-6.12-rc2-4-g34d5b600172b Git Commit: 34d5b600172b846161e507bdce132c98d9cc9701 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

8 months, 3 weeks

1
0
0 0

[PATCH net-next 0/5] selftests: mlxsw: Stabilize RED tests

by Petr Machata

Tweak the mlxsw-specific RED selftests to increase stability on Spectrum-3 and Spectrum-4 machines. Petr Machata (5): selftests: mlxsw: sch_red_ets: Increase required backlog selftests: mlxsw: sch_red_core: Increase backlog size tolerance selftests: mlxsw: sch_red_core: Sleep before querying queue depth selftests: mlxsw: sch_red_core: Send more packets for drop tests selftests: mlxsw: sch_red_core: Lower TBF rate .../drivers/net/mlxsw/sch_red_core.sh | 28 +++++++++++-------- .../drivers/net/mlxsw/sch_red_ets.sh | 8 +++--- 2 files changed, 20 insertions(+), 16 deletions(-) -- 2.45.0

8 months, 3 weeks

2
6
0 0

[PATCH v2] selftests: vDSO: Explicitly include sched.h

by Yu Liao

The previous commit introduced the use of CLONE_NEWTIME without including <sched.h> which contains its definition. Add an explicit include of <sched.h> to ensure that CLONE_NEWTIME is correctly defined before it is used. Fixes: 2aec90036dcd ("selftests: vDSO: ensure vgetrandom works in a time namespace") Signed-off-by: Yu Liao <liaoyu15(a)huawei.com> --- Changes in v2: - Include <sched.h> instead of <linux/sched.h> v1: https://lore.kernel.org/all/20240919111841.20226-1-liaoyu15@huawei.com/ tools/testing/selftests/vDSO/vdso_test_getrandom.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/vDSO/vdso_test_getrandom.c b/tools/testing/selftests/vDSO/vdso_test_getrandom.c index 72a1d9b43a84..ddf37e3ab18b 100644 --- a/tools/testing/selftests/vDSO/vdso_test_getrandom.c +++ b/tools/testing/selftests/vDSO/vdso_test_getrandom.c @@ -11,6 +11,7 @@ #include <string.h> #include <time.h> #include <unistd.h> +#include <sched.h> #include <signal.h> #include <sys/auxv.h> #include <sys/mman.h> -- 2.33.0

8 months, 3 weeks

2
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[PATCH kselftest 0/3] getrandom & chacha cleanups

by Jason A. Donenfeld

Hi Shuah, I've now read your email several times trying to figure out what you meant and what your objections are. This series is my best attempt at trying to satisfy that. But my understanding still has a lot of question marks, so I may have missed your point here. Nonetheless, maybe this moves things forward a bit. Jason Cc: Shuah Khan <skhan(a)linuxfoundation.org> Cc: Greg KH <greg(a)kroah.com> Jason A. Donenfeld (3): selftests: vDSO: condition chacha build on chacha implementation selftests: vDSO: unconditionally build getrandom test selftests: vDSO: improve getrandom and chacha error messages tools/testing/selftests/vDSO/Makefile | 4 +- .../testing/selftests/vDSO/vdso_test_chacha.c | 27 ++++--- .../selftests/vDSO/vdso_test_getrandom.c | 75 ++++++++----------- 3 files changed, 52 insertions(+), 54 deletions(-) -- 2.46.0

8 months, 3 weeks

3
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[PATCH v4 0/2] Exposing nice CPU usage to userspace

by Joshua Hahn

Changes in v4 - Removed unnecessary forking from selftest. - Style changes in rstat.c (fallthrough & indents) - Fixed a selftest bug that raised false negatives, caused by cputime_adjust sometimes adjusting utime below ntime. - Reworded cover letter for clarity & motivation Changes in v3 - Signed-off-by & renamed subject for clarity. Changes in v2 - Edited commit messages for clarity. Niced CPU usage is a metric reported in host-level /proc/stat, but is not currently reported in cgroup-level statistics. Thus, even if one can observe that a fracion of the host's CPU time is spent on (non-)nice tasks, the distribution of the CPU usage across cgroups is not readily available to the user. This patch introduces cgroup-level niced CPU utilization to cpu.stat. Exposing this metric will allow users to accurately probe the niced CPU metric for each workload, and make more informed decisions when directing higher priority tasks. For instance, service routers will be able to probe cgroups in the host to determine CPU time spent on niced processes in each cgroup, and direct more traffic to cgroups with lower non-nice CPU utilization. Signed-off-by Joshua Hahn <joshua.hahnjy(a)gmail.com> Joshua Hahn (2): Tracking cgroup-level niced CPU time Selftests for niced CPU statistics include/linux/cgroup-defs.h | 1 + kernel/cgroup/rstat.c | 19 ++++-- tools/testing/selftests/cgroup/test_cpu.c | 75 +++++++++++++++++++++++ 3 files changed, 90 insertions(+), 5 deletions(-) -- 2.43.5

8 months, 3 weeks

2
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[PATCH bpf] selftests/bpf: add missing header include for htons

by Alexis Lothoré (eBPF Foundation)

Including the network_helpers.h header in tests can lead to the following build error: ./network_helpers.h: In function ‘csum_tcpudp_magic’: ./network_helpers.h:116:14: error: implicit declaration of function \ ‘htons’ [-Werror=implicit-function-declaration] 116 | s += htons(proto + len); The error is avoided in many cases thanks to some other headers included earlier and bringing in arpa/inet.h (ie: test_progs.h). Make sure that test_progs build success does not depend on header ordering by adding the missing header include in network_helpers.h Fixes: f6642de0c3e9 ("selftests/bpf: Add csum helpers") Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore(a)bootlin.com> --- tools/testing/selftests/bpf/network_helpers.h | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h index c72c16e1aff825439896b38e59962ffafe92dc71..5764155b6d25188ed38e828e1e4a8a08f8a83934 100644 --- a/tools/testing/selftests/bpf/network_helpers.h +++ b/tools/testing/selftests/bpf/network_helpers.h @@ -1,6 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0 */ #ifndef __NETWORK_HELPERS_H #define __NETWORK_HELPERS_H +#include <arpa/inet.h> #include <sys/socket.h> #include <sys/types.h> #include <linux/types.h> --- base-commit: 67a7c7b656cfc10a7280f71641fb9e88726e8a5d change-id: 20241008-network_helpers_fix-bbb7d1589930 Best regards, -- Alexis Lothoré, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

8 months, 3 weeks

2
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[PATCH] selftests: make kselftest-clean remove libynl outputs

by Greg Thelen

Starting with 6.12 commit 85585b4bc8d8 ("selftests: add ncdevmem, netcat for devmem TCP") kselftest-all creates additional outputs that kselftest-clean does not cleanup: $ make defconfig $ make kselftest-all $ make kselftest-clean $ git clean -ndxf | grep tools/net Would remove tools/net/ynl/lib/__pycache__/ Would remove tools/net/ynl/lib/ynl.a Would remove tools/net/ynl/lib/ynl.d Would remove tools/net/ynl/lib/ynl.o Make kselftest-clean remove the newly added net/ynl outputs. Fixes: 85585b4bc8d8 ("selftests: add ncdevmem, netcat for devmem TCP") Signed-off-by: Greg Thelen <gthelen(a)google.com> --- tools/testing/selftests/net/ynl.mk | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/net/ynl.mk b/tools/testing/selftests/net/ynl.mk index 59cb26cf3f73..1ef24119def0 100644 --- a/tools/testing/selftests/net/ynl.mk +++ b/tools/testing/selftests/net/ynl.mk @@ -19,3 +19,7 @@ $(YNL_OUTPUTS): CFLAGS += \ $(OUTPUT)/libynl.a: $(Q)$(MAKE) -C $(top_srcdir)/tools/net/ynl GENS="$(YNL_GENS)" libynl.a $(Q)cp $(top_srcdir)/tools/net/ynl/libynl.a $(OUTPUT)/libynl.a + +EXTRA_CLEAN += \ + $(top_srcdir)/tools/net/ynl/lib/__pycache__ \ + $(top_srcdir)/tools/net/ynl/lib/*.[ado] -- 2.47.0.rc0.187.ge670bccf7e-goog

8 months, 3 weeks

5
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[PATCH net v2 0/3] selftests: net: add missing gitignore and EXTRA_CLEAN entries.

by Javier Carrasco

This series is a cherry-pick on top of v6.12-rc1 from the one I sent for selftests with other patches that were not net-related: https://lore.kernel.org/all/20240925-selftests-gitignore-v3-0-9db896474170@… The patches have not been modified, and the Reviewed-by tags have been kept. Signed-off-by: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> --- Changes in v2: - rebase to net/main and solve conflicts in rds/Makefile - Tag series for net. - Link to v1: https://lore.kernel.org/r/20240930-net-selftests-gitignore-v1-0-65225a85594… --- Javier Carrasco (3): selftests: net: add msg_oob to gitignore selftests: net: rds: add include.sh to EXTRA_CLEAN selftests: net: rds: add gitignore file for include.sh tools/testing/selftests/net/.gitignore | 1 + tools/testing/selftests/net/rds/.gitignore | 1 + tools/testing/selftests/net/rds/Makefile | 2 +- 3 files changed, 3 insertions(+), 1 deletion(-) --- base-commit: 9234a2549cb6ac038bec36cc7c084218e9575513 change-id: 20240930-net-selftests-gitignore-18b844f29391 Best regards, -- Javier Carrasco <javier.carrasco.cruz(a)gmail.com>

8 months, 3 weeks

2
4
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[PATCH net-next v20 11/14] mm: page_frag: add testing for the newly added prepare API

by Yunsheng Lin

Add testing for the newly added prepare API, for both aligned and non-aligned API, also probe API is also tested along with prepare API. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- .../selftests/mm/page_frag/page_frag_test.c | 66 +++++++++++++++++-- tools/testing/selftests/mm/run_vmtests.sh | 4 ++ tools/testing/selftests/mm/test_page_frag.sh | 31 +++++++++ 3 files changed, 96 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 36543a129e40..567bcc6a181e 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -29,6 +29,10 @@ static bool test_align; module_param(test_align, bool, 0); MODULE_PARM_DESC(test_align, "use align API for testing"); +static bool test_prepare; +module_param(test_prepare, bool, 0); +MODULE_PARM_DESC(test_prepare, "use prepare API for testing"); + static int test_alloc_len = 2048; module_param(test_alloc_len, int, 0); MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); @@ -68,6 +72,18 @@ static int page_frag_pop_thread(void *arg) return 0; } +static void frag_frag_test_commit(struct page_frag_cache *nc, + struct page_frag *prepare_pfrag, + struct page_frag *probe_pfrag, + unsigned int used_sz) +{ + WARN_ON_ONCE(prepare_pfrag->page != probe_pfrag->page || + prepare_pfrag->offset != probe_pfrag->offset || + prepare_pfrag->size != probe_pfrag->size); + + page_frag_commit(nc, prepare_pfrag, used_sz); +} + static int page_frag_push_thread(void *arg) { struct ptr_ring *ring = arg; @@ -80,13 +96,52 @@ static int page_frag_push_thread(void *arg) int ret; if (test_align) { - va = page_frag_alloc_align(&test_nc, test_alloc_len, - GFP_KERNEL, SMP_CACHE_BYTES); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare_align(&test_nc, + test_alloc_len, + &prepare_frag, + GFP_KERNEL, + SMP_CACHE_BYTES); + + probe_va = __page_frag_alloc_refill_probe_align(&test_nc, + test_alloc_len, + &probe_frag, + -SMP_CACHE_BYTES); + WARN_ON_ONCE(va != probe_va); + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc_align(&test_nc, + test_alloc_len, + GFP_KERNEL, + SMP_CACHE_BYTES); + } WARN_ONCE((unsigned long)va & (SMP_CACHE_BYTES - 1), "unaligned va returned\n"); } else { - va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare(&test_nc, test_alloc_len, + &prepare_frag, GFP_KERNEL); + + probe_va = page_frag_alloc_refill_probe(&test_nc, test_alloc_len, + &probe_frag); + + WARN_ON_ONCE(va != probe_va); + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } } if (!va) @@ -152,8 +207,9 @@ static int __init page_frag_test_init(void) test_pushed, test_popped); duration = (u64)ktime_us_delta(ktime_get(), start); - pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, - test_align ? "aligned" : "non-aligned", duration); + pr_info("%d of iterations for %s %s API testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", + test_prepare ? "prepare" : "alloc", duration); ptr_ring_cleanup(&ptr_ring, NULL); page_frag_cache_drain(&test_nc); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 2c5394584af4..f6ff9080a6f2 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -464,6 +464,10 @@ CATEGORY="page_frag" run_test ./test_page_frag.sh aligned CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned_prepare + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned_prepare + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh index d750d910c899..71c3531fa38e 100755 --- a/tools/testing/selftests/mm/test_page_frag.sh +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -36,6 +36,8 @@ ksft_skip=4 SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" +NONALIGNED_PREPARE_PARAM="$NONALIGNED_PARAM test_prepare=1" +ALIGNED_PREPARE_PARAM="$ALIGNED_PARAM test_prepare=1" check_test_requirements() { @@ -74,6 +76,24 @@ run_aligned_check() echo "Check the kernel ring buffer to see the summary." } +run_nonaligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast nonaligned prepare API is." + + insmod $DRIVER $NONALIGNED_PREPARE_PARAM > /dev/null 2>&1 + echo "Done." + echo "Ccheck the kernel ring buffer to see the summary." +} + +run_aligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast aligned prepare API is." + + insmod $DRIVER $ALIGNED_PREPARE_PARAM > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + run_smoke_check() { echo "Run smoke test." @@ -86,6 +106,7 @@ run_smoke_check() usage() { echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "[ aligned_prepare ] | [ nonaligned_prepare ] | " echo "manual parameters" echo echo "Valid tests and parameters:" @@ -106,6 +127,12 @@ usage() echo "# Performance testing for aligned alloc API" echo "$0 aligned" echo + echo "# Performance testing for nonaligned prepare API" + echo "$0 nonaligned_prepare" + echo + echo "# Performance testing for aligned prepare API" + echo "$0 aligned_prepare" + echo exit 0 } @@ -159,6 +186,10 @@ function run_test() run_nonaligned_check elif [[ "$1" = "aligned" ]]; then run_aligned_check + elif [[ "$1" = "nonaligned_prepare" ]]; then + run_nonaligned_prepare_check + elif [[ "$1" = "aligned_prepare" ]]; then + run_aligned_prepare_check else run_manual_check $@ fi -- 2.33.0

8 months, 3 weeks

1
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[PATCH net-next v20 04/14] mm: page_frag: avoid caller accessing 'page_frag_cache' directly

by Yunsheng Lin

Use appropriate frag_page API instead of caller accessing 'page_frag_cache' directly. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> Acked-by: Chuck Lever <chuck.lever(a)oracle.com> --- drivers/vhost/net.c | 2 +- include/linux/page_frag_cache.h | 10 ++++++++++ net/core/skbuff.c | 6 +++--- net/rxrpc/conn_object.c | 4 +--- net/rxrpc/local_object.c | 4 +--- net/sunrpc/svcsock.c | 6 ++---- tools/testing/selftests/mm/page_frag/page_frag_test.c | 2 +- 7 files changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index f16279351db5..9ad37c012189 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1325,7 +1325,7 @@ static int vhost_net_open(struct inode *inode, struct file *f) vqs[VHOST_NET_VQ_RX]); f->private_data = n; - n->pf_cache.va = NULL; + page_frag_cache_init(&n->pf_cache); return 0; } diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h index 67ac8626ed9b..0a52f7a179c8 100644 --- a/include/linux/page_frag_cache.h +++ b/include/linux/page_frag_cache.h @@ -7,6 +7,16 @@ #include <linux/mm_types_task.h> #include <linux/types.h> +static inline void page_frag_cache_init(struct page_frag_cache *nc) +{ + nc->va = NULL; +} + +static inline bool page_frag_cache_is_pfmemalloc(struct page_frag_cache *nc) +{ + return !!nc->pfmemalloc; +} + void page_frag_cache_drain(struct page_frag_cache *nc); void __page_frag_cache_drain(struct page *page, unsigned int count); void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 74149dc4ee31..ca01880c7ad0 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -753,14 +753,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (in_hardirq() || irqs_disabled()) { nc = this_cpu_ptr(&netdev_alloc_cache); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); } else { local_bh_disable(); local_lock_nested_bh(&napi_alloc_cache.bh_lock); nc = this_cpu_ptr(&napi_alloc_cache.page); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); local_unlock_nested_bh(&napi_alloc_cache.bh_lock); local_bh_enable(); @@ -850,7 +850,7 @@ struct sk_buff *napi_alloc_skb(struct napi_struct *napi, unsigned int len) len = SKB_HEAD_ALIGN(len); data = page_frag_alloc(&nc->page, len, gfp_mask); - pfmemalloc = nc->page.pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(&nc->page); } local_unlock_nested_bh(&napi_alloc_cache.bh_lock); diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 1539d315afe7..694c4df7a1a3 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -337,9 +337,7 @@ static void rxrpc_clean_up_connection(struct work_struct *work) */ rxrpc_purge_queue(&conn->rx_queue); - if (conn->tx_data_alloc.va) - __page_frag_cache_drain(virt_to_page(conn->tx_data_alloc.va), - conn->tx_data_alloc.pagecnt_bias); + page_frag_cache_drain(&conn->tx_data_alloc); call_rcu(&conn->rcu, rxrpc_rcu_free_connection); } diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index 504453c688d7..a8cffe47cf01 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -452,9 +452,7 @@ void rxrpc_destroy_local(struct rxrpc_local *local) #endif rxrpc_purge_queue(&local->rx_queue); rxrpc_purge_client_connections(local); - if (local->tx_alloc.va) - __page_frag_cache_drain(virt_to_page(local->tx_alloc.va), - local->tx_alloc.pagecnt_bias); + page_frag_cache_drain(&local->tx_alloc); } /* diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 825ec5357691..b785425c3315 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1608,7 +1608,6 @@ static void svc_tcp_sock_detach(struct svc_xprt *xprt) static void svc_sock_free(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct page_frag_cache *pfc = &svsk->sk_frag_cache; struct socket *sock = svsk->sk_sock; trace_svcsock_free(svsk, sock); @@ -1618,8 +1617,7 @@ static void svc_sock_free(struct svc_xprt *xprt) sockfd_put(sock); else sock_release(sock); - if (pfc->va) - __page_frag_cache_drain(virt_to_head_page(pfc->va), - pfc->pagecnt_bias); + + page_frag_cache_drain(&svsk->sk_frag_cache); kfree(svsk); } diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index fdf204550c9a..36543a129e40 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -117,7 +117,7 @@ static int __init page_frag_test_init(void) u64 duration; int ret; - test_nc.va = NULL; + page_frag_cache_init(&test_nc); atomic_set(&nthreads, 2); init_completion(&wait); -- 2.33.0

8 months, 3 weeks

1
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[PATCH net-next v20 02/14] mm: move the page fragment allocator from page_alloc into its own file

by Yunsheng Lin

Inspired by [1], move the page fragment allocator from page_alloc into its own c file and header file, as we are about to make more change for it to replace another page_frag implementation in sock.c As this patchset is going to replace 'struct page_frag' with 'struct page_frag_cache' in sched.h, including page_frag_cache.h in sched.h has a compiler error caused by interdependence between mm_types.h and mm.h for asm-offsets.c, see [2]. So avoid the compiler error by moving 'struct page_frag_cache' to mm_types_task.h as suggested by Alexander, see [3]. 1. https://lore.kernel.org/all/20230411160902.4134381-3-dhowells@redhat.com/ 2. https://lore.kernel.org/all/15623dac-9358-4597-b3ee-3694a5956920@gmail.com/ 3. https://lore.kernel.org/all/CAKgT0UdH1yD=LSCXFJ=YM_aiA4OomD-2wXykO42bizaWMt… CC: David Howells <dhowells(a)redhat.com> CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Acked-by: Andrew Morton <akpm(a)linux-foundation.org> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- include/linux/gfp.h | 22 --- include/linux/mm_types.h | 18 --- include/linux/mm_types_task.h | 18 +++ include/linux/page_frag_cache.h | 31 ++++ include/linux/skbuff.h | 1 + mm/Makefile | 1 + mm/page_alloc.c | 136 ---------------- mm/page_frag_cache.c | 145 ++++++++++++++++++ .../selftests/mm/page_frag/page_frag_test.c | 2 +- 9 files changed, 197 insertions(+), 177 deletions(-) create mode 100644 include/linux/page_frag_cache.h create mode 100644 mm/page_frag_cache.c diff --git a/include/linux/gfp.h b/include/linux/gfp.h index a951de920e20..a0a6d25f883f 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -371,28 +371,6 @@ __meminit void *alloc_pages_exact_nid_noprof(int nid, size_t size, gfp_t gfp_mas extern void __free_pages(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order); -struct page_frag_cache; -void page_frag_cache_drain(struct page_frag_cache *nc); -extern void __page_frag_cache_drain(struct page *page, unsigned int count); -void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, - gfp_t gfp_mask, unsigned int align_mask); - -static inline void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align) -{ - WARN_ON_ONCE(!is_power_of_2(align)); - return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); -} - -static inline void *page_frag_alloc(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask) -{ - return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); -} - -extern void page_frag_free(void *addr); - #define __free_page(page) __free_pages((page), 0) #define free_page(addr) free_pages((addr), 0) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 6e3bdf8e38bc..92314ef2d978 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -521,9 +521,6 @@ static_assert(sizeof(struct ptdesc) <= sizeof(struct page)); */ #define STRUCT_PAGE_MAX_SHIFT (order_base_2(sizeof(struct page))) -#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) -#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) - /* * page_private can be used on tail pages. However, PagePrivate is only * checked by the VM on the head page. So page_private on the tail pages @@ -542,21 +539,6 @@ static inline void *folio_get_private(struct folio *folio) return folio->private; } -struct page_frag_cache { - void * va; -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - __u16 offset; - __u16 size; -#else - __u32 offset; -#endif - /* we maintain a pagecount bias, so that we dont dirty cache line - * containing page->_refcount every time we allocate a fragment. - */ - unsigned int pagecnt_bias; - bool pfmemalloc; -}; - typedef unsigned long vm_flags_t; /* diff --git a/include/linux/mm_types_task.h b/include/linux/mm_types_task.h index bff5706b76e1..0ac6daebdd5c 100644 --- a/include/linux/mm_types_task.h +++ b/include/linux/mm_types_task.h @@ -8,6 +8,7 @@ * (These are defined separately to decouple sched.h from mm_types.h as much as possible.) */ +#include <linux/align.h> #include <linux/types.h> #include <asm/page.h> @@ -43,6 +44,23 @@ struct page_frag { #endif }; +#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) +#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) +struct page_frag_cache { + void *va; +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + __u16 offset; + __u16 size; +#else + __u32 offset; +#endif + /* we maintain a pagecount bias, so that we dont dirty cache line + * containing page->_refcount every time we allocate a fragment. + */ + unsigned int pagecnt_bias; + bool pfmemalloc; +}; + /* Track pages that require TLB flushes */ struct tlbflush_unmap_batch { #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h new file mode 100644 index 000000000000..67ac8626ed9b --- /dev/null +++ b/include/linux/page_frag_cache.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_PAGE_FRAG_CACHE_H +#define _LINUX_PAGE_FRAG_CACHE_H + +#include <linux/log2.h> +#include <linux/mm_types_task.h> +#include <linux/types.h> + +void page_frag_cache_drain(struct page_frag_cache *nc); +void __page_frag_cache_drain(struct page *page, unsigned int count); +void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, + gfp_t gfp_mask, unsigned int align_mask); + +static inline void *page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align) +{ + WARN_ON_ONCE(!is_power_of_2(align)); + return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); +} + +static inline void *page_frag_alloc(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask) +{ + return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); +} + +void page_frag_free(void *addr); + +#endif diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 39f1d16f3628..560e2b49f98b 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -31,6 +31,7 @@ #include <linux/in6.h> #include <linux/if_packet.h> #include <linux/llist.h> +#include <linux/page_frag_cache.h> #include <net/flow.h> #if IS_ENABLED(CONFIG_NF_CONNTRACK) #include <linux/netfilter/nf_conntrack_common.h> diff --git a/mm/Makefile b/mm/Makefile index d5639b036166..dba52bb0da8a 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -65,6 +65,7 @@ page-alloc-$(CONFIG_SHUFFLE_PAGE_ALLOCATOR) += shuffle.o memory-hotplug-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o obj-y += page-alloc.o +obj-y += page_frag_cache.o obj-y += init-mm.o obj-y += memblock.o obj-y += $(memory-hotplug-y) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8afab64814dc..6ca2abce857b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4836,142 +4836,6 @@ void free_pages(unsigned long addr, unsigned int order) EXPORT_SYMBOL(free_pages); -/* - * Page Fragment: - * An arbitrary-length arbitrary-offset area of memory which resides - * within a 0 or higher order page. Multiple fragments within that page - * are individually refcounted, in the page's reference counter. - * - * The page_frag functions below provide a simple allocation framework for - * page fragments. This is used by the network stack and network device - * drivers to provide a backing region of memory for use as either an - * sk_buff->head, or to be used in the "frags" portion of skb_shared_info. - */ -static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, - gfp_t gfp_mask) -{ - struct page *page = NULL; - gfp_t gfp = gfp_mask; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | - __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; - page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, - PAGE_FRAG_CACHE_MAX_ORDER); - nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; -#endif - if (unlikely(!page)) - page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); - - nc->va = page ? page_address(page) : NULL; - - return page; -} - -void page_frag_cache_drain(struct page_frag_cache *nc) -{ - if (!nc->va) - return; - - __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); - nc->va = NULL; -} -EXPORT_SYMBOL(page_frag_cache_drain); - -void __page_frag_cache_drain(struct page *page, unsigned int count) -{ - VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); - - if (page_ref_sub_and_test(page, count)) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(__page_frag_cache_drain); - -void *__page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask) -{ - unsigned int size = PAGE_SIZE; - struct page *page; - int offset; - - if (unlikely(!nc->va)) { -refill: - page = __page_frag_cache_refill(nc, gfp_mask); - if (!page) - return NULL; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* Even if we own the page, we do not use atomic_set(). - * This would break get_page_unless_zero() users. - */ - page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); - - /* reset page count bias and offset to start of new frag */ - nc->pfmemalloc = page_is_pfmemalloc(page); - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - nc->offset = size; - } - - offset = nc->offset - fragsz; - if (unlikely(offset < 0)) { - page = virt_to_page(nc->va); - - if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) - goto refill; - - if (unlikely(nc->pfmemalloc)) { - free_unref_page(page, compound_order(page)); - goto refill; - } - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* OK, page count is 0, we can safely set it */ - set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); - - /* reset page count bias and offset to start of new frag */ - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - offset = size - fragsz; - if (unlikely(offset < 0)) { - /* - * The caller is trying to allocate a fragment - * with fragsz > PAGE_SIZE but the cache isn't big - * enough to satisfy the request, this may - * happen in low memory conditions. - * We don't release the cache page because - * it could make memory pressure worse - * so we simply return NULL here. - */ - return NULL; - } - } - - nc->pagecnt_bias--; - offset &= align_mask; - nc->offset = offset; - - return nc->va + offset; -} -EXPORT_SYMBOL(__page_frag_alloc_align); - -/* - * Frees a page fragment allocated out of either a compound or order 0 page. - */ -void page_frag_free(void *addr) -{ - struct page *page = virt_to_head_page(addr); - - if (unlikely(put_page_testzero(page))) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(page_frag_free); - static void *make_alloc_exact(unsigned long addr, unsigned int order, size_t size) { diff --git a/mm/page_frag_cache.c b/mm/page_frag_cache.c new file mode 100644 index 000000000000..609a485cd02a --- /dev/null +++ b/mm/page_frag_cache.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Page fragment allocator + * + * Page Fragment: + * An arbitrary-length arbitrary-offset area of memory which resides within a + * 0 or higher order page. Multiple fragments within that page are + * individually refcounted, in the page's reference counter. + * + * The page_frag functions provide a simple allocation framework for page + * fragments. This is used by the network stack and network device drivers to + * provide a backing region of memory for use as either an sk_buff->head, or to + * be used in the "frags" portion of skb_shared_info. + */ + +#include <linux/export.h> +#include <linux/gfp_types.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/page_frag_cache.h> +#include "internal.h" + +static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, + gfp_t gfp_mask) +{ + struct page *page = NULL; + gfp_t gfp = gfp_mask; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | + __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; + page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, + PAGE_FRAG_CACHE_MAX_ORDER); + nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; +#endif + if (unlikely(!page)) + page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); + + nc->va = page ? page_address(page) : NULL; + + return page; +} + +void page_frag_cache_drain(struct page_frag_cache *nc) +{ + if (!nc->va) + return; + + __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); + nc->va = NULL; +} +EXPORT_SYMBOL(page_frag_cache_drain); + +void __page_frag_cache_drain(struct page *page, unsigned int count) +{ + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + + if (page_ref_sub_and_test(page, count)) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(__page_frag_cache_drain); + +void *__page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask) +{ + unsigned int size = PAGE_SIZE; + struct page *page; + int offset; + + if (unlikely(!nc->va)) { +refill: + page = __page_frag_cache_refill(nc, gfp_mask); + if (!page) + return NULL; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* Even if we own the page, we do not use atomic_set(). + * This would break get_page_unless_zero() users. + */ + page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); + + /* reset page count bias and offset to start of new frag */ + nc->pfmemalloc = page_is_pfmemalloc(page); + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + nc->offset = size; + } + + offset = nc->offset - fragsz; + if (unlikely(offset < 0)) { + page = virt_to_page(nc->va); + + if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) + goto refill; + + if (unlikely(nc->pfmemalloc)) { + free_unref_page(page, compound_order(page)); + goto refill; + } + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* OK, page count is 0, we can safely set it */ + set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); + + /* reset page count bias and offset to start of new frag */ + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + offset = size - fragsz; + if (unlikely(offset < 0)) { + /* + * The caller is trying to allocate a fragment + * with fragsz > PAGE_SIZE but the cache isn't big + * enough to satisfy the request, this may + * happen in low memory conditions. + * We don't release the cache page because + * it could make memory pressure worse + * so we simply return NULL here. + */ + return NULL; + } + } + + nc->pagecnt_bias--; + offset &= align_mask; + nc->offset = offset; + + return nc->va + offset; +} +EXPORT_SYMBOL(__page_frag_alloc_align); + +/* + * Frees a page fragment allocated out of either a compound or order 0 page. + */ +void page_frag_free(void *addr) +{ + struct page *page = virt_to_head_page(addr); + + if (unlikely(put_page_testzero(page))) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(page_frag_free); diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index eeb2b6bc681a..fdf204550c9a 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -6,12 +6,12 @@ * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> */ -#include <linux/mm.h> #include <linux/module.h> #include <linux/cpumask.h> #include <linux/completion.h> #include <linux/ptr_ring.h> #include <linux/kthread.h> +#include <linux/page_frag_cache.h> static struct ptr_ring ptr_ring; static int nr_objs = 512; -- 2.33.0

8 months, 3 weeks

1
0
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[RESEND PATCH v4] list: test: Check the size of every lists for list_cut_position*()

by I Hsin Cheng

Check the total number of elements in both resultant lists are correct within list_cut_position*(). Previously, only the first list's size was checked. wo additional elements in the second list would not have been caught. Signed-off-by: I Hsin Cheng <richard120310(a)gmail.com> --- change in v4: Amend the description of commit message, make it less confusing and focus on the correct check which is performed now. lib/list-test.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/list-test.c b/lib/list-test.c index 37cbc33e9fdb..b4b3810c71d0 100644 --- a/lib/list-test.c +++ b/lib/list-test.c @@ -408,6 +408,8 @@ static void list_test_list_cut_position(struct kunit *test) KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); i++; } + + KUNIT_EXPECT_EQ(test, i, 3); } static void list_test_list_cut_before(struct kunit *test) @@ -436,6 +438,8 @@ static void list_test_list_cut_before(struct kunit *test) KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); i++; } + + KUNIT_EXPECT_EQ(test, i, 3); } static void list_test_list_splice(struct kunit *test) -- 2.43.0

8 months, 3 weeks

2
1
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[RESEND PATCH v4] list: test: Check the size of every lists for list_cut_position*()

by I Hsin Cheng

Check the total number of elements in both resultant lists are correct within list_cut_position*(). Previously, only the first list's size was checked. so additional elements in the second list would not have been caught. Signed-off-by: I Hsin Cheng <richard120310(a)gmail.com> --- change in v4: Amend the description of commit message, make it less confusing and focus on the correct check which is performed now. lib/list-test.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/list-test.c b/lib/list-test.c index 37cbc33e9fdb..b4b3810c71d0 100644 --- a/lib/list-test.c +++ b/lib/list-test.c @@ -408,6 +408,8 @@ static void list_test_list_cut_position(struct kunit *test) KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); i++; } + + KUNIT_EXPECT_EQ(test, i, 3); } static void list_test_list_cut_before(struct kunit *test) @@ -436,6 +438,8 @@ static void list_test_list_cut_before(struct kunit *test) KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); i++; } + + KUNIT_EXPECT_EQ(test, i, 3); } static void list_test_list_splice(struct kunit *test) -- 2.43.0

8 months, 3 weeks

1
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[PATCH 00/33] riscv control-flow integrity for usermode

by Deepak Gupta

v5 for cpu assisted riscv user mode control flow integrity. zicfiss and zicfilp [1] are ratified riscv CPU extensions. Changes in this version are - rebased on v6.12-rc1 - Fixed schema related issues in device tree file - Fixed some of the documentation related issues in zicfilp/ss.rst (style issues and added index) - added `SHADOW_STACK_SET_MARKER` so that implementation can define base of shadow stack. - Fixed warnings on definitions added in usercfi.h when CONFIG_RISCV_USER_CFI is not selected. - Adopted context header based signal handling as proposed by Andy Chiu - Added support for enabling kernel mode access to shadow stack using FWFT [4] v4 [3] and v3 [2] are earlier versions of patch series. To get more information on kernel interactions with respect to zicfilp and zicfiss, patch series adds documentation for `zicfilp` and `zicfiss` Documentation/arch/riscv/zicfiss.rst Documentation/arch/riscv/zicfilp.rst How to test this series ======================= Toolchain --------- $ git clone git@github.com:sifive/riscv-gnu-toolchain.git -b cfi-dev $ riscv-gnu-toolchain/configure --prefix=<path-to-where-to-build> --with-arch=rv64gc_zicfilp_zicfiss --enable-linux --disable-gdb --with-extra-multilib-test="rv64gc_zicfilp_zicfiss-lp64d:-static" $ make -j$(nproc) Qemu ---- $ git clone git@github.com:deepak0414/qemu.git -b zicfilp_zicfiss_ratified_master_july11 $ cd qemu $ mkdir build $ cd build $ ../configure --target-list=riscv64-softmmu $ make -j$(nproc) Opensbi ------- $ git clone git@github.com:deepak0414/opensbi.git -b v6_cfi_spec_split_opensbi $ make CROSS_COMPILE=<your riscv toolchain> -j$(nproc) PLATFORM=generic Linux ----- Running defconfig is fine. CFI is enabled by default if the toolchain supports it. $ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc) defconfig $ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc) Running ------- Modify your qemu command to have: -bios <path-to-cfi-opensbi>/build/platform/generic/firmware/fw_dynamic.bin -cpu rv64,zicfilp=true,zicfiss=true,zimop=true,zcmop=true vDSO related Opens (in the flux) ================================= I am listing these opens for laying out plan and what to expect in future patch sets. And of course for the sake of discussion. Shadow stack and landing pad enabling in vDSO ---------------------------------------------- vDSO must have shadow stack and landing pad support compiled in for task to have shadow stack and landing pad support. This patch series doesn't enable that (yet). Enabling shadow stack support in vDSO should be straight forward (intend to do that in next versions of patch set). Enabling landing pad support in vDSO requires some collaboration with toolchain folks to follow a single label scheme for all object binaries. This is necessary to ensure that all indirect call-sites are setting correct label and target landing pads are decorated with same label scheme. How many vDSOs --------------- Shadow stack instructions are carved out of zimop (may be operations) and if CPU doesn't implement zimop, they're illegal instructions. Kernel could be running on a CPU which may or may not implement zimop. And thus kernel will have to carry 2 different vDSOs and expose the appropriate one depending on whether CPU implements zimop or not. [1] - https://github.com/riscv/riscv-cfi [2] - https://lore.kernel.org/lkml/20240403234054.2020347-1-debug@rivosinc.com/ [3] - https://lore.kernel.org/all/20240912231650.3740732-1-debug@rivosinc.com/ [4] - https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-firmware… --- changelog --------- v4 -- - rebased on 6.11-rc6 - envcfg: Converged with Samuel Holland's patches for envcfg management on per- thread basis. - vma_is_shadow_stack is renamed to is_vma_shadow_stack - picked up Mark Brown's `ARCH_HAS_USER_SHADOW_STACK` patch - signal context: using extended context management to maintain compatibility. - fixed `-Wmissing-prototypes` compiler warnings for prctl functions - Documentation fixes and amending typos. v3 -- envcfg: logic to pick up base envcfg had a bug where `ENVCFG_CBZE` could have been picked on per task basis, even though CPU didn't implement it. Fixed in this series. dt-bindings: As suggested, split into separate commit. fixed the messaging that spec is in public review arch_is_shadow_stack change: arch_is_shadow_stack changed to vma_is_shadow_stack hwprobe: zicfiss / zicfilp if present will get enumerated in hwprobe selftests: As suggested, added object and binary filenames to .gitignore Selftest binary anyways need to be compiled with cfi enabled compiler which will make sure that landing pad and shadow stack are enabled. Thus removed separate enable/disable tests. Cleaned up tests a bit. v2 -- - Using config `CONFIG_RISCV_USER_CFI`, kernel support for riscv control flow integrity for user mode programs can be compiled in the kernel. - Enabling of control flow integrity for user programs is left to user runtime - This patch series introduces arch agnostic `prctls` to enable shadow stack and indirect branch tracking. And implements them on riscv. Signed-off-by: Deepak Gupta <debug(a)rivosinc.com> --- Andy Chiu (1): riscv: signal: abstract header saving for setup_sigcontext Clément Léger (1): riscv: Add Firmware Feature SBI extensions definitions Deepak Gupta (26): mm: helper `is_shadow_stack_vma` to check shadow stack vma riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv riscv: zicfilp / zicfiss in dt-bindings (extensions.yaml) riscv: zicfiss / zicfilp enumeration riscv: zicfiss / zicfilp extension csr and bit definitions riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE riscv mm: manufacture shadow stack pte riscv mmu: teach pte_mkwrite to manufacture shadow stack PTEs riscv mmu: write protect and shadow stack riscv/mm: Implement map_shadow_stack() syscall riscv/shstk: If needed allocate a new shadow stack on clone prctl: arch-agnostic prctl for indirect branch tracking riscv: Implements arch agnostic shadow stack prctls riscv: Implements arch agnostic indirect branch tracking prctls riscv/traps: Introduce software check exception riscv signal: save and restore of shadow stack for signal riscv/kernel: update __show_regs to print shadow stack register riscv/ptrace: riscv cfi status and state via ptrace and in core files riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe riscv: enable kernel access to shadow stack memory via FWFT sbi call riscv: kernel command line option to opt out of user cfi riscv: create a config for shadow stack and landing pad instr support riscv: Documentation for landing pad / indirect branch tracking riscv: Documentation for shadow stack on riscv kselftest/riscv: kselftest for user mode cfi Mark Brown (2): mm: Introduce ARCH_HAS_USER_SHADOW_STACK prctl: arch-agnostic prctl for shadow stack Samuel Holland (3): riscv: Enable cbo.zero only when all harts support Zicboz riscv: Add support for per-thread envcfg CSR values riscv: Call riscv_user_isa_enable() only on the boot hart Documentation/arch/riscv/index.rst | 2 + Documentation/arch/riscv/zicfilp.rst | 115 +++++ Documentation/arch/riscv/zicfiss.rst | 176 +++++++ .../devicetree/bindings/riscv/extensions.yaml | 14 + arch/riscv/Kconfig | 20 + arch/riscv/include/asm/asm-prototypes.h | 1 + arch/riscv/include/asm/cpufeature.h | 15 +- arch/riscv/include/asm/csr.h | 16 + arch/riscv/include/asm/entry-common.h | 2 + arch/riscv/include/asm/hwcap.h | 2 + arch/riscv/include/asm/mman.h | 24 + arch/riscv/include/asm/pgtable.h | 30 +- arch/riscv/include/asm/processor.h | 2 + arch/riscv/include/asm/sbi.h | 27 ++ arch/riscv/include/asm/switch_to.h | 8 + arch/riscv/include/asm/thread_info.h | 4 + arch/riscv/include/asm/usercfi.h | 89 ++++ arch/riscv/include/uapi/asm/hwprobe.h | 2 + arch/riscv/include/uapi/asm/ptrace.h | 22 + arch/riscv/include/uapi/asm/sigcontext.h | 1 + arch/riscv/kernel/Makefile | 2 + arch/riscv/kernel/asm-offsets.c | 8 + arch/riscv/kernel/cpufeature.c | 13 +- arch/riscv/kernel/entry.S | 31 +- arch/riscv/kernel/head.S | 12 + arch/riscv/kernel/process.c | 31 +- arch/riscv/kernel/ptrace.c | 83 ++++ arch/riscv/kernel/signal.c | 140 +++++- arch/riscv/kernel/smpboot.c | 2 - arch/riscv/kernel/suspend.c | 4 +- arch/riscv/kernel/sys_hwprobe.c | 2 + arch/riscv/kernel/sys_riscv.c | 10 + arch/riscv/kernel/traps.c | 42 ++ arch/riscv/kernel/usercfi.c | 526 +++++++++++++++++++++ arch/riscv/mm/init.c | 2 +- arch/riscv/mm/pgtable.c | 17 + arch/x86/Kconfig | 1 + fs/proc/task_mmu.c | 2 +- include/linux/cpu.h | 4 + include/linux/mm.h | 5 +- include/uapi/asm-generic/mman.h | 4 + include/uapi/linux/elf.h | 1 + include/uapi/linux/prctl.h | 48 ++ kernel/sys.c | 60 +++ mm/Kconfig | 6 + mm/gup.c | 2 +- mm/mmap.c | 1 + mm/vma.h | 10 +- tools/testing/selftests/riscv/Makefile | 2 +- tools/testing/selftests/riscv/cfi/.gitignore | 3 + tools/testing/selftests/riscv/cfi/Makefile | 10 + tools/testing/selftests/riscv/cfi/cfi_rv_test.h | 83 ++++ tools/testing/selftests/riscv/cfi/riscv_cfi_test.c | 82 ++++ tools/testing/selftests/riscv/cfi/shadowstack.c | 362 ++++++++++++++ tools/testing/selftests/riscv/cfi/shadowstack.h | 37 ++ 55 files changed, 2178 insertions(+), 42 deletions(-) --- base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc change-id: 20240930-v5_user_cfi_series-3dc332f8f5b2 -- - debug

8 months, 3 weeks

7
48
0 0

[PATCH] selftests: vDSO: fix compile error for vdso_test_getrandom

by Yu Liao

When building selftests/vDSO: $ make -C tools/testing/selftests TARGETS=vDSO I hit the following compilation error: vdso_test_getrandom.c:260:17: error: 'CLONE_NEWTIME' undeclared (first use in this function); did you mean 'CLONE_NEWIPC'? 260 | assert(unshare(CLONE_NEWTIME) == 0); | ^~~~~~~~~~~~~ CLONE_NEWTIME is defined in linux/sched.h, so fix this by including <linux/sched.h>. Fixes: 2aec90036dcd ("selftests: vDSO: ensure vgetrandom works in a time namespace") Signed-off-by: Yu Liao <liaoyu15(a)huawei.com> --- tools/testing/selftests/vDSO/vdso_test_getrandom.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/vDSO/vdso_test_getrandom.c b/tools/testing/selftests/vDSO/vdso_test_getrandom.c index 72a1d9b43a84..84f2bbb2d5e0 100644 --- a/tools/testing/selftests/vDSO/vdso_test_getrandom.c +++ b/tools/testing/selftests/vDSO/vdso_test_getrandom.c @@ -19,6 +19,7 @@ #include <sys/ptrace.h> #include <sys/wait.h> #include <sys/types.h> +#include <linux/sched.h> #include <linux/random.h> #include <linux/compiler.h> #include <linux/ptrace.h> -- 2.33.0

8 months, 3 weeks

4
8
0 0

[PATCH] selftests/bpf: Add __init and __exit to the functions bpf_test_no_cfi_init()/bpf_test_no_cfi_exit()

by Yaxiong Tian

From: Yaxiong Tian <iambestgod(a)outlook.com> To save some running memory,Add __init and __exit to the module load/unload functions. Signed-off-by: Yaxiong Tian <tianyaxiong(a)kylinos.cn> --- tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c b/tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c index 948eb3962732..aa571ab3c6c6 100644 --- a/tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c +++ b/tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c @@ -56,7 +56,7 @@ static struct bpf_struct_ops test_no_cif_ops = { .owner = THIS_MODULE, }; -static int bpf_test_no_cfi_init(void) +static int __init bpf_test_no_cfi_init(void) { int ret; @@ -71,7 +71,7 @@ static int bpf_test_no_cfi_init(void) return ret; } -static void bpf_test_no_cfi_exit(void) +static void __exit bpf_test_no_cfi_exit(void) { } -- 2.34.1

8 months, 3 weeks

2
2
0 0

[PATCH v2] selftests: sched_ext: Add sched_ext as proper selftest target

by Björn Töpel

From: Björn Töpel <bjorn(a)rivosinc.com> The sched_ext selftests is missing proper cross-compilation support, a proper target entry, and out-of-tree build support. When building the kselftest suite, e.g.: make ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu- \ SKIP_TARGETS="" O=/output/foo -C tools/testing/selftests install The expectation is that the sched_ext is included, cross-built, and placed into /output/foo. Add CROSS_COMPILE, OUTPUT, and TARGETS support to the sched_ext selftest. Also, remove some variables that were unused by the Makefile. Signed-off-by: Björn Töpel <bjorn(a)rivosinc.com> --- v2: * Removed the duplicated LLVM prefix parsing (David) * Made sure make clean didn't do a complete mess (David) * Added sched_ext to default skip (Shuah) --- tools/testing/selftests/Makefile | 9 +-- tools/testing/selftests/sched_ext/Makefile | 80 +++++++++++----------- 2 files changed, 45 insertions(+), 44 deletions(-) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..363d031a16f7 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -88,6 +88,7 @@ TARGETS += rlimits TARGETS += rseq TARGETS += rtc TARGETS += rust +TARGETS += sched_ext TARGETS += seccomp TARGETS += sgx TARGETS += sigaltstack @@ -129,10 +130,10 @@ ifeq ($(filter net/lib,$(TARGETS)),) endif endif -# User can optionally provide a TARGETS skiplist. By default we skip -# BPF since it has cutting edge build time dependencies which require -# more effort to install. -SKIP_TARGETS ?= bpf +# User can optionally provide a TARGETS skiplist. By default we skip +# targets using BPF since it has cutting edge build time dependencies +# which require more effort to install. +SKIP_TARGETS ?= bpf sched_ext ifneq ($(SKIP_TARGETS),) TMP := $(filter-out $(SKIP_TARGETS), $(TARGETS)) override TARGETS := $(TMP) diff --git a/tools/testing/selftests/sched_ext/Makefile b/tools/testing/selftests/sched_ext/Makefile index 0754a2c110a1..acab9732b23e 100644 --- a/tools/testing/selftests/sched_ext/Makefile +++ b/tools/testing/selftests/sched_ext/Makefile @@ -3,24 +3,13 @@ include ../../../build/Build.include include ../../../scripts/Makefile.arch include ../../../scripts/Makefile.include + +TEST_GEN_PROGS := runner + +# override lib.mk's default rules +OVERRIDE_TARGETS := 1 include ../lib.mk -ifneq ($(LLVM),) -ifneq ($(filter %/,$(LLVM)),) -LLVM_PREFIX := $(LLVM) -else ifneq ($(filter -%,$(LLVM)),) -LLVM_SUFFIX := $(LLVM) -endif - -CC := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) $(CLANG_FLAGS) -fintegrated-as -else -CC := gcc -endif # LLVM - -ifneq ($(CROSS_COMPILE),) -$(error CROSS_COMPILE not supported for scx selftests) -endif # CROSS_COMPILE - CURDIR := $(abspath .) REPOROOT := $(abspath ../../../..) TOOLSDIR := $(REPOROOT)/tools @@ -34,18 +23,31 @@ GENHDR := $(GENDIR)/autoconf.h SCXTOOLSDIR := $(TOOLSDIR)/sched_ext SCXTOOLSINCDIR := $(TOOLSDIR)/sched_ext/include -OUTPUT_DIR := $(CURDIR)/build +OUTPUT_DIR := $(OUTPUT)/build OBJ_DIR := $(OUTPUT_DIR)/obj INCLUDE_DIR := $(OUTPUT_DIR)/include BPFOBJ_DIR := $(OBJ_DIR)/libbpf SCXOBJ_DIR := $(OBJ_DIR)/sched_ext BPFOBJ := $(BPFOBJ_DIR)/libbpf.a LIBBPF_OUTPUT := $(OBJ_DIR)/libbpf/libbpf.a -DEFAULT_BPFTOOL := $(OUTPUT_DIR)/sbin/bpftool -HOST_BUILD_DIR := $(OBJ_DIR) -HOST_OUTPUT_DIR := $(OUTPUT_DIR) -VMLINUX_BTF_PATHS ?= ../../../../vmlinux \ +ifneq ($(CROSS_COMPILE),) +DEFAULT_BPFTOOL := $(OUTPUT_DIR)/host/sbin/bpftool +HOST_OBJ_DIR := $(OBJ_DIR)/host/bpftool +HOST_LIBBPF_OUTPUT := $(OBJ_DIR)/host/libbpf/ +HOST_LIBBPF_DESTDIR := $(OUTPUT_DIR)/host/ +HOST_DESTDIR := $(OUTPUT_DIR)/host/ +else +DEFAULT_BPFTOOL := $(OUTPUT_DIR)/sbin/bpftool +HOST_OBJ_DIR := $(OBJ_DIR)/bpftool +HOST_LIBBPF_OUTPUT := $(OBJ_DIR)/libbpf/ +HOST_LIBBPF_DESTDIR := $(OUTPUT_DIR)/ +HOST_DESTDIR := $(OUTPUT_DIR)/ +endif + +VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ + $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ + ../../../../vmlinux \ /sys/kernel/btf/vmlinux \ /boot/vmlinux-$(shell uname -r) VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) @@ -80,17 +82,23 @@ IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \ # Use '-idirafter': Don't interfere with include mechanics except where the # build would have failed anyways. define get_sys_includes -$(shell $(1) -v -E - </dev/null 2>&1 \ +$(shell $(1) $(2) -v -E - </dev/null 2>&1 \ | sed -n '/<...> search starts here:/,/End of search list./{ s| $/.*$|-idirafter \1|p }') \ -$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') +$(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') endef +ifneq ($(CROSS_COMPILE),) +CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%)) +endif + +CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH)) + BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) \ $(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) \ -I$(CURDIR)/include -I$(CURDIR)/include/bpf-compat \ -I$(INCLUDE_DIR) -I$(APIDIR) -I$(SCXTOOLSINCDIR) \ -I$(REPOROOT)/include \ - $(call get_sys_includes,$(CLANG)) \ + $(CLANG_SYS_INCLUDES) \ -Wall -Wno-compare-distinct-pointer-types \ -Wno-incompatible-function-pointer-types \ -O2 -mcpu=v3 @@ -98,7 +106,7 @@ BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) \ # sort removes libbpf duplicates when not cross-building MAKE_DIRS := $(sort $(OBJ_DIR)/libbpf $(OBJ_DIR)/libbpf \ $(OBJ_DIR)/bpftool $(OBJ_DIR)/resolve_btfids \ - $(INCLUDE_DIR) $(SCXOBJ_DIR)) + $(HOST_OBJ_DIR) $(INCLUDE_DIR) $(SCXOBJ_DIR)) $(MAKE_DIRS): $(call msg,MKDIR,,$@) @@ -112,14 +120,14 @@ $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ DESTDIR=$(OUTPUT_DIR) prefix= all install_headers $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ - $(LIBBPF_OUTPUT) | $(OBJ_DIR)/bpftool + $(LIBBPF_OUTPUT) | $(HOST_OBJ_DIR) $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \ EXTRA_CFLAGS='-g -O0' \ - OUTPUT=$(OBJ_DIR)/bpftool/ \ - LIBBPF_OUTPUT=$(OBJ_DIR)/libbpf/ \ - LIBBPF_DESTDIR=$(OUTPUT_DIR)/ \ - prefix= DESTDIR=$(OUTPUT_DIR)/ install-bin + OUTPUT=$(HOST_OBJ_DIR)/ \ + LIBBPF_OUTPUT=$(HOST_LIBBPF_OUTPUT) \ + LIBBPF_DESTDIR=$(HOST_LIBBPF_DESTDIR) \ + prefix= DESTDIR=$(HOST_DESTDIR) install-bin $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR) ifeq ($(VMLINUX_H),) @@ -150,9 +158,7 @@ $(INCLUDE_DIR)/%.bpf.skel.h: $(SCXOBJ_DIR)/%.bpf.o $(INCLUDE_DIR)/vmlinux.h $(BP override define CLEAN rm -rf $(OUTPUT_DIR) - rm -f *.o *.bpf.o *.bpf.skel.h *.bpf.subskel.h rm -f $(TEST_GEN_PROGS) - rm -f runner endef # Every testcase takes all of the BPF progs are dependencies by default. This @@ -196,21 +202,15 @@ $(SCXOBJ_DIR)/runner.o: runner.c | $(SCXOBJ_DIR) # function doesn't support using implicit rules otherwise. $(testcase-targets): $(SCXOBJ_DIR)/%.o: %.c $(SCXOBJ_DIR)/runner.o $(all_test_bpfprogs) | $(SCXOBJ_DIR) $(eval test=$(patsubst %.o,%.c,$(notdir $@))) - $(CC) $(CFLAGS) -c $< -o $@ $(SCXOBJ_DIR)/runner.o + $(CC) $(CFLAGS) -c $< -o $@ $(SCXOBJ_DIR)/util.o: util.c | $(SCXOBJ_DIR) $(CC) $(CFLAGS) -c $< -o $@ -runner: $(SCXOBJ_DIR)/runner.o $(SCXOBJ_DIR)/util.o $(BPFOBJ) $(testcase-targets) +$(OUTPUT)/runner: $(SCXOBJ_DIR)/runner.o $(SCXOBJ_DIR)/util.o $(BPFOBJ) $(testcase-targets) @echo "$(testcase-targets)" $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) -TEST_GEN_PROGS := runner - -all: runner - -.PHONY: all clean help - .DEFAULT_GOAL := all .DELETE_ON_ERROR: base-commit: 8cf0b93919e13d1e8d4466eb4080a4c4d9d66d7b -- 2.43.0

8 months, 3 weeks

2
7
0 0

[PATCH v4] Kunit to check the longest symbol length

by Sergio González Collado

The longest length of a symbol (KSYM_NAME_LEN) was increased to 512 in the reference [1]. This patch adds a kunit test to check the longest symbol length. This test can also help other efforts for longer symbol lenght, like [2]. [1] https://lore.kernel.org/lkml/20220802015052.10452-6-ojeda@kernel.org/ [2] https://lore.kernel.org/lkml/20240605032120.3179157-1-song@kernel.org/ Tested-by: Martin Rodriguez Reboredo <yakoyoku(a)gmail.com> Signed-off-by: Sergio González Collado <sergio.collado(a)gmail.com> --- V1 -> V2: corrected CI tests. Added fix proposed at [3] [3] https://lore.kernel.org/lkml/Y9ES4UKl%2F+DtvAVS@gmail.com/T/#m3ef0e12bb834d… --- V2 -> V3: updated base and added MODULE_DESCRIPTION() and MODULE_AUTHOR() --- V3 -> V4: add x86 mantainers, add new reference. --- arch/x86/tools/insn_decoder_test.c | 3 +- lib/Kconfig.debug | 9 +++ lib/Makefile | 2 + lib/longest_symbol_kunit.c | 124 +++++++++++++++++++++++++++++ 4 files changed, 137 insertions(+), 1 deletion(-) create mode 100644 lib/longest_symbol_kunit.c diff --git a/arch/x86/tools/insn_decoder_test.c b/arch/x86/tools/insn_decoder_test.c index 472540aeabc2..3bde35ea4188 100644 --- a/arch/x86/tools/insn_decoder_test.c +++ b/arch/x86/tools/insn_decoder_test.c @@ -10,6 +10,7 @@ #include <assert.h> #include <unistd.h> #include <stdarg.h> +#include <linux/kallsysms.h> #define unlikely(cond) (cond) @@ -106,7 +107,7 @@ static void parse_args(int argc, char **argv) } } -#define BUFSIZE 256 +#define BUFSIZE (256 + KSYM_NAME_LEN) int main(int argc, char **argv) { diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index bc8faa4509e1..09015e7e07f3 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2805,6 +2805,15 @@ config FORTIFY_KUNIT_TEST by the str*() and mem*() family of functions. For testing runtime traps of FORTIFY_SOURCE, see LKDTM's "FORTIFY_*" tests. +config LONGEST_SYM_KUNIT_TEST + tristate "Test the longest symbol possible" if !KUNIT_ALL_TESTS + depends on KUNIT && KPROBES + default KUNIT_ALL_TESTS + help + Tests the longest symbol possible + + If unsure, say N. + config HW_BREAKPOINT_KUNIT_TEST bool "Test hw_breakpoint constraints accounting" if !KUNIT_ALL_TESTS depends on HAVE_HW_BREAKPOINT diff --git a/lib/Makefile b/lib/Makefile index 773adf88af41..fc878e716825 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -389,6 +389,8 @@ CFLAGS_fortify_kunit.o += $(DISABLE_STRUCTLEAK_PLUGIN) obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o obj-$(CONFIG_USERCOPY_KUNIT_TEST) += usercopy_kunit.o +obj-$(CONFIG_LONGEST_SYM_KUNIT_TEST) += longest_symbol_kunit.o +CFLAGS_longest_symbol_kunit.o += $(call cc-disable-warning, missing-prototypes) obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o diff --git a/lib/longest_symbol_kunit.c b/lib/longest_symbol_kunit.c new file mode 100644 index 000000000000..557ad6eae56c --- /dev/null +++ b/lib/longest_symbol_kunit.c @@ -0,0 +1,124 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Test the longest symbol length. Execute with: + * ./tools/testing/kunit/kunit.py run longest-symbol + * --arch=x86_64 --kconfig_add CONFIG_KPROBES=y --kconfig_add CONFIG_MODULES=y + * --kconfig_add CONFIG_RETPOLINE=n + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <kunit/test.h> +#include <linux/stringify.h> +#include <linux/kprobes.h> +#include <linux/kallsyms.h> + +#define DI(name) s##name##name +#define DDI(name) DI(n##name##name) +#define DDDI(name) DDI(n##name##name) +#define DDDDI(name) DDDI(n##name##name) +#define DDDDDI(name) DDDDI(n##name##name) + +#define PLUS1(name) __PASTE(name, e) + +/*Generate a symbol whose name length is 511 */ +#define LONGEST_SYM_NAME DDDDDI(g1h2i3j4k5l6m7n) + +/*Generate a symbol whose name length is 512 */ +#define LONGEST_SYM_NAME_PLUS1 PLUS1(LONGEST_SYM_NAME) + +#define RETURN_LONGEST_SYM 0xAAAAA +#define RETURN_LONGEST_SYM_PLUS1 0x55555 + +noinline int LONGEST_SYM_NAME(void); +noinline int LONGEST_SYM_NAME(void) +{ + return RETURN_LONGEST_SYM; +} + +noinline int LONGEST_SYM_NAME_PLUS1(void); +noinline int LONGEST_SYM_NAME_PLUS1(void) +{ + return RETURN_LONGEST_SYM_PLUS1; +} + +_Static_assert(sizeof(__stringify(LONGEST_SYM_NAME)) == KSYM_NAME_LEN, +"Incorrect symbol length found. Expected KSYM_NAME_LEN: " +__stringify(KSYM_NAME) ", but found: " +__stringify(sizeof(LONGEST_SYM_NAME))); + +static void test_longest_symbol(struct kunit *test) +{ + KUNIT_EXPECT_EQ(test, RETURN_LONGEST_SYM, LONGEST_SYM_NAME()); +}; + +static void test_longest_symbol_kallsyms(struct kunit *test) +{ + unsigned long (*kallsyms_lookup_name)(const char *name); + static int (*longest_sym)(void); + + struct kprobe kp = { + .symbol_name = "kallsyms_lookup_name", + }; + + if (register_kprobe(&kp) < 0) { + pr_info("%s: kprobe not registered\n", __func__); + KUNIT_FAIL(test, "test_longest_symbol kallsysms: kprobe not registered\n"); + return; + } + + kunit_warn(test, "test_longest_symbol kallsyms: kprobe registered\n"); + kallsyms_lookup_name = (unsigned long (*)(const char *name))kp.addr; + unregister_kprobe(&kp); + + longest_sym = + (void *) kallsyms_lookup_name(__stringify(LONGEST_SYM_NAME)); + KUNIT_EXPECT_EQ(test, RETURN_LONGEST_SYM, longest_sym()); +}; + +static void test_longest_symbol_plus1(struct kunit *test) +{ + KUNIT_EXPECT_EQ(test, RETURN_LONGEST_SYM_PLUS1, LONGEST_SYM_NAME_PLUS1()); +}; + +static void test_longest_symbol_plus1_kallsyms(struct kunit *test) +{ + unsigned long (*kallsyms_lookup_name)(const char *name); + static int (*longest_sym_plus1)(void); + + struct kprobe kp = { + .symbol_name = "kallsyms_lookup_name", + }; + + if (register_kprobe(&kp) < 0) { + pr_info("%s: kprobe not registered\n", __func__); + KUNIT_FAIL(test, "test_longest_symbol kallsysms: kprobe not registered\n"); + return; + } + + kunit_warn(test, "test_longest_symbol_plus1 kallsyms: kprobe registered\n"); + kallsyms_lookup_name = (unsigned long (*)(const char *name))kp.addr; + unregister_kprobe(&kp); + + longest_sym_plus1 = + (void *) kallsyms_lookup_name(__stringify(LONGEST_SYM_NAME_PLUS1)); + KUNIT_EXPECT_NULL(test, longest_sym_plus1); +}; + +static struct kunit_case longest_symbol_test_cases[] = { + KUNIT_CASE(test_longest_symbol), + KUNIT_CASE(test_longest_symbol_kallsyms), + KUNIT_CASE(test_longest_symbol_plus1), + KUNIT_CASE(test_longest_symbol_plus1_kallsyms), + {} +}; + +static struct kunit_suite longest_symbol_test_suite = { + .name = "longest-symbol", + .test_cases = longest_symbol_test_cases, +}; +kunit_test_suite(longest_symbol_test_suite); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Test the longest symbol length"); +MODULE_AUTHOR("Sergio González Collado"); base-commit: abf2050f51fdca0fd146388f83cddd95a57a008d -- 2.39.2

8 months, 3 weeks

2
1
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[RESEND PATCH v3] list: test: Mending tests for list_cut_position()

by I Hsin Cheng

Mending test for list_cut_position*() for the missing check of integer "i" after the second loop. The variable should be checked for second time to make sure both lists after the cut operation are formed as expected. Signed-off-by: I Hsin Cheng <richard120310(a)gmail.com> --- lib/list-test.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/list-test.c b/lib/list-test.c index 37cbc33e9fdb..b4b3810c71d0 100644 --- a/lib/list-test.c +++ b/lib/list-test.c @@ -408,6 +408,8 @@ static void list_test_list_cut_position(struct kunit *test) KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); i++; } + + KUNIT_EXPECT_EQ(test, i, 3); } static void list_test_list_cut_before(struct kunit *test) @@ -436,6 +438,8 @@ static void list_test_list_cut_before(struct kunit *test) KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); i++; } + + KUNIT_EXPECT_EQ(test, i, 3); } static void list_test_list_splice(struct kunit *test) -- 2.43.0

8 months, 3 weeks

3
3
0 0

[ lists.linaro.org ] WARNING on 10/7/2024 5:10:52 p.m. The “linux-kselftest-mirror@lists.linaro.org” email account is nearly full.

by cPanel on lists.linaro.org

8 months, 3 weeks

1
0
0 0

[PATCH v2 0/1] update mseal.rst

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)chromium.org> Pedro Falcato's optimization [1] for checking sealed VMAs, which replaces the can_modify_mm() function with an in-loop check, necessitates an update to the mseal.rst documentation to reflect this change. Furthermore, the document has received offline comments regarding the code sample and suggestions for sentence clarification to enhance reader comprehension. [1] https://lore.kernel.org/linux-mm/20240817-mseal-depessimize-v3-0-d8d2e037df… History: V2: update according to Randy Dunlap's comments. V1: initial version https://lore.kernel.org/all/20240927185211.729207-1-jeffxu@chromium.org/ Jeff Xu (1): mseal: update mseal.rst Documentation/userspace-api/mseal.rst | 304 ++++++++++++-------------- 1 file changed, 144 insertions(+), 160 deletions(-) -- 2.46.1.824.gd892dcdcdd-goog

8 months, 3 weeks

4
9
0 0

[PATCH v6 0/2] Add test to distinguish between thread's signal mask and ucontext_t

by Dev Jain

This patch series is motivated by the following observation: Raise a signal, jump to signal handler. The ucontext_t structure dumped by kernel to userspace has a uc_sigmask field having the mask of blocked signals. If you run a fresh minimalistic program doing this, this field is empty, even if you block some signals while registering the handler with sigaction(). Here is what the man-pages have to say: sigaction(2): "sa_mask specifies a mask of signals which should be blocked (i.e., added to the signal mask of the thread in which the signal handler is invoked) during execution of the signal handler. In addition, the signal which triggered the handler will be blocked, unless the SA_NODEFER flag is used." signal(7): Under "Execution of signal handlers", (1.3) implies: "The thread's current signal mask is accessible via the ucontext_t object that is pointed to by the third argument of the signal handler." But, (1.4) states: "Any signals specified in act->sa_mask when registering the handler with sigprocmask(2) are added to the thread's signal mask. The signal being delivered is also added to the signal mask, unless SA_NODEFER was specified when registering the handler. These signals are thus blocked while the handler executes." There clearly is no distinction being made in the man pages between "Thread's signal mask" and ucontext_t; this logically should imply that a signal blocked by populating struct sigaction should be visible in ucontext_t. Here is what the kernel code does (for Aarch64): do_signal() -> handle_signal() -> sigmask_to_save(), which returns &current->blocked, is passed to setup_rt_frame() -> setup_sigframe() -> __copy_to_user(). Hence, &current->blocked is copied to ucontext_t exposed to userspace. Returning back to handle_signal(), signal_setup_done() -> signal_delivered() -> sigorsets() and set_current_blocked() are responsible for using information from struct ksignal ksig, which was populated through the sigaction() system call in kernel/signal.c: copy_from_user(&new_sa.sa, act, sizeof(new_sa.sa)), to update &current->blocked; hence, the set of blocked signals for the current thread is updated AFTER the kernel dumps ucontext_t to userspace. Assuming that the above is indeed the intended behaviour, because it semantically makes sense, since the signals blocked using sigaction() remain blocked only till the execution of the handler, and not in the context present before jumping to the handler (but nothing can be confirmed from the man-pages), the series introduces a test for mangling with uc_sigmask. I will send a separate series to fix the man-pages. The proposed selftest has been tested out on Aarch32, Aarch64 and x86_64. v5->v6: - Drop renaming of sas.c - Include the explanation from the cover letter in the changelog for the second patch v4->v5: - Remove a redundant print statement v3->v4: - Allocate sigsets as automatic variables to avoid malloc() v2->v3: - ucontext describes current state -> ucontext describes interrupted context - Add a comment for blockage of USR2 even after return from handler - Describe blockage of signals in a better way v1->v2: - Replace all occurrences of SIGPIPE with SIGSEGV - Fixed a mismatch between code comment and ksft log - Add a testcase: Raise the same signal again; it must not be queued - Remove unneeded <assert.h>, <unistd.h> - Give a detailed test description in the comments; also describe the exact meaning of delivered and blocked - Handle errors for all libc functions/syscalls - Mention tests in Makefile and .gitignore in alphabetical order v1: - https://lore.kernel.org/all/20240607122319.768640-1-dev.jain@arm.com/ Dev Jain (2): selftests: Rename sigaltstack to generic signal selftests: Add a test mangling with uc_sigmask tools/testing/selftests/Makefile | 2 +- .../{sigaltstack => signal}/.gitignore | 1 + .../{sigaltstack => signal}/Makefile | 3 +- .../current_stack_pointer.h | 0 .../selftests/signal/mangle_uc_sigmask.c | 184 ++++++++++++++++++ .../selftests/{sigaltstack => signal}/sas.c | 0 6 files changed, 188 insertions(+), 2 deletions(-) rename tools/testing/selftests/{sigaltstack => signal}/.gitignore (70%) rename tools/testing/selftests/{sigaltstack => signal}/Makefile (56%) rename tools/testing/selftests/{sigaltstack => signal}/current_stack_pointer.h (100%) create mode 100644 tools/testing/selftests/signal/mangle_uc_sigmask.c rename tools/testing/selftests/{sigaltstack => signal}/sas.c (100%) -- 2.30.2

8 months, 3 weeks

3
16
0 0

[PATCH 0/3] debugobjects: Add hlist_cut_number() and use it to optimize code

by Zhen Lei

Zhen Lei (3): list: add hlist_cut_number() list: test: Add a test for hlist_cut_number() debugobjects: Use hlist_cut_number() to optimize performance and improve readability include/linux/list.h | 44 +++++++++++++++++ lib/debugobjects.c | 115 ++++++++++++++++++------------------------- lib/list-test.c | 51 +++++++++++++++++++ 3 files changed, 143 insertions(+), 67 deletions(-) -- 2.34.1

8 months, 4 weeks

4
11
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Testing Quality Call notes - 2024-11-03

by Laura Nao

Hello, KernelCI is hosting a bi-weekly call on Thursday to discuss improvements to existing upstream tests, the development of new tests to increase kernel testing coverage, and the enablement of these tests in KernelCI. Below is a list of the tests the community has been working on and their latest status updates, as discussed in the last meeting held on 2024-11-03: *Missing devices kselftest* - Proposing new kselftest to report devices that go missing in the system (v2): https://lore.kernel.org/all/20240928-kselftest-dev-exist-v2-1-fab07de6b80b@… - Sent v2 addressing feedback received on the RFCv1 and during the session at LPC 2024: https://www.youtube.com/live/kcr8NXEbzcg?si=QWBvJAOjj7tg264o&t=11283 *Boot time test* - RFC: https://lore.kernel.org/all/20240725110622.96301-1-laura.nao@collabora.com/… - Discussed proposal at LPC2024: https://www.youtube.com/live/8XQwzUZxLK4?feature=shared&t=16944 - Planning on preparing v2, based on feedback received in the session - Suggestions for improvements and additional features include: exploring bootloader tracing via pre-filled ftrace buffers, adding support for specifying variance values on a per-event basis, investigating the use of ftrace histograms for initcalls *Device testing documentation* - Patch: https://lore.kernel.org/all/20241001-kselftest-device-docs-v1-1-be28b70dd85… - Submitted documentation on device testing, detailing the types of kselftests available, their requirements, and the coverage they provide. The goal is to guide users in selecting the appropriate tests for their devices. *GPIO test* - RFC: https://lore.kernel.org/all/20240909-kselftest-gpio-set-get-config-v1-0-16a… - Proposed a new kselftest to verify the GPIO driver functionality. The test uses a YAML-based test plan that specifies the configurations to be checked. It sets each pin configuration and retrieves it to ensure they match. Currently, the test only verifies bias settings, but it can be easily extended to cover additional pin configurations. Please reply to this thread if you'd like to join the call or discuss any of the topics further. We look forward to collaborating with the community to improve upstream tests and expand coverage to more areas of interest within the kernel. Best regards, Laura Nao

8 months, 4 weeks

1
0
0 0

[PATCH v3] lib: math: Move kunit tests into tests/ subdir

by Luis Felipe Hernandez

This patch is a follow-up task from a discussion stemming from point 3 in a recent patch introducing the int_pow kunit test [1] and documentation regarding kunit test style and nomenclature [2]. Colocate all kunit test suites in lib/math/tests/ and follow recommended naming convention for files <suite>_kunit.c and kconfig entries CONFIG_<name>_KUNIT_TEST. Link: https://lore.kernel.org/all/CABVgOS=-vh5TqHFCq_jo=ffq8v_nGgr6JsPnOZag3e6+19… [1] Link: https://docs.kernel.org/dev-tools/kunit/style.html [2] Signed-off-by: Luis Felipe Hernandez <luis.hernandez093(a)gmail.com> --- Changes in v2: Fix cc recipient list inclusion in cover letter Changes in v3: Update mul_u64_u64_div_u64_kunit.c path in comment describing shell script --- arch/m68k/configs/amiga_defconfig | 2 +- arch/m68k/configs/apollo_defconfig | 2 +- arch/m68k/configs/atari_defconfig | 2 +- arch/m68k/configs/bvme6000_defconfig | 2 +- arch/m68k/configs/hp300_defconfig | 2 +- arch/m68k/configs/mac_defconfig | 2 +- arch/m68k/configs/multi_defconfig | 2 +- arch/m68k/configs/mvme147_defconfig | 2 +- arch/m68k/configs/mvme16x_defconfig | 2 +- arch/m68k/configs/q40_defconfig | 2 +- arch/m68k/configs/sun3_defconfig | 2 +- arch/m68k/configs/sun3x_defconfig | 2 +- arch/powerpc/configs/ppc64_defconfig | 2 +- lib/Kconfig.debug | 6 +++--- lib/math/Makefile | 5 +---- lib/math/tests/Makefile | 5 ++++- lib/math/{test_div64.c => tests/div64_kunit.c} | 0 .../mul_u64_u64_div_u64_kunit.c} | 2 +- lib/math/{rational-test.c => tests/rational_kunit.c} | 0 19 files changed, 22 insertions(+), 22 deletions(-) rename lib/math/{test_div64.c => tests/div64_kunit.c} (100%) rename lib/math/{test_mul_u64_u64_div_u64.c => tests/mul_u64_u64_div_u64_kunit.c} (98%) rename lib/math/{rational-test.c => tests/rational_kunit.c} (100%) diff --git a/arch/m68k/configs/amiga_defconfig b/arch/m68k/configs/amiga_defconfig index d01dc47d52ea..7ba9311c084c 100644 --- a/arch/m68k/configs/amiga_defconfig +++ b/arch/m68k/configs/amiga_defconfig @@ -619,7 +619,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/apollo_defconfig b/arch/m68k/configs/apollo_defconfig index 46808e581d7b..273fe4032b85 100644 --- a/arch/m68k/configs/apollo_defconfig +++ b/arch/m68k/configs/apollo_defconfig @@ -576,7 +576,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/atari_defconfig b/arch/m68k/configs/atari_defconfig index 4469a7839c9d..9976cda99fc1 100644 --- a/arch/m68k/configs/atari_defconfig +++ b/arch/m68k/configs/atari_defconfig @@ -596,7 +596,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/bvme6000_defconfig b/arch/m68k/configs/bvme6000_defconfig index c0719322c028..f59082c8fe06 100644 --- a/arch/m68k/configs/bvme6000_defconfig +++ b/arch/m68k/configs/bvme6000_defconfig @@ -568,7 +568,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/hp300_defconfig b/arch/m68k/configs/hp300_defconfig index 8d429e63f8f2..6db3556da9ac 100644 --- a/arch/m68k/configs/hp300_defconfig +++ b/arch/m68k/configs/hp300_defconfig @@ -578,7 +578,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/mac_defconfig b/arch/m68k/configs/mac_defconfig index bafd33da27c1..25c06b5c83ee 100644 --- a/arch/m68k/configs/mac_defconfig +++ b/arch/m68k/configs/mac_defconfig @@ -595,7 +595,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/multi_defconfig b/arch/m68k/configs/multi_defconfig index 6f5ca3f85ea1..35e57e0ee139 100644 --- a/arch/m68k/configs/multi_defconfig +++ b/arch/m68k/configs/multi_defconfig @@ -681,7 +681,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/mvme147_defconfig b/arch/m68k/configs/mvme147_defconfig index d16b328c7136..d253b686119a 100644 --- a/arch/m68k/configs/mvme147_defconfig +++ b/arch/m68k/configs/mvme147_defconfig @@ -567,7 +567,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/mvme16x_defconfig b/arch/m68k/configs/mvme16x_defconfig index 80f6c15a5ed5..62bc6ad63783 100644 --- a/arch/m68k/configs/mvme16x_defconfig +++ b/arch/m68k/configs/mvme16x_defconfig @@ -568,7 +568,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/q40_defconfig b/arch/m68k/configs/q40_defconfig index 0e81589f0ee2..caba39c61bac 100644 --- a/arch/m68k/configs/q40_defconfig +++ b/arch/m68k/configs/q40_defconfig @@ -585,7 +585,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/sun3_defconfig b/arch/m68k/configs/sun3_defconfig index 8cd785290339..a348f645ed55 100644 --- a/arch/m68k/configs/sun3_defconfig +++ b/arch/m68k/configs/sun3_defconfig @@ -565,7 +565,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/sun3x_defconfig b/arch/m68k/configs/sun3x_defconfig index 78035369f60f..f8b3cfc3275b 100644 --- a/arch/m68k/configs/sun3x_defconfig +++ b/arch/m68k/configs/sun3x_defconfig @@ -566,7 +566,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig index a5e3e7f97f4d..f1f21765c0c1 100644 --- a/arch/powerpc/configs/ppc64_defconfig +++ b/arch/powerpc/configs/ppc64_defconfig @@ -435,7 +435,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_LKDTM=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_BACKTRACE_SELF_TEST=m CONFIG_TEST_REF_TRACKER=m CONFIG_RBTREE_TEST=m diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7315f643817a..0d6c979f0bfd 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2296,7 +2296,7 @@ config TEST_SORT If unsure, say N. -config TEST_DIV64 +config DIV64_KUNIT_TEST tristate "64bit/32bit division and modulo test" depends on DEBUG_KERNEL || m help @@ -2306,7 +2306,7 @@ config TEST_DIV64 If unsure, say N. -config TEST_MULDIV64 +config MULDIV64_KUNIT_TEST tristate "mul_u64_u64_div_u64() test" depends on DEBUG_KERNEL || m help @@ -3089,7 +3089,7 @@ endmenu # "Rust" endmenu # Kernel hacking -config INT_POW_TEST +config INT_POW_KUNIT_TEST tristate "Integer exponentiation (int_pow) test" if !KUNIT_ALL_TESTS depends on KUNIT default KUNIT_ALL_TESTS diff --git a/lib/math/Makefile b/lib/math/Makefile index 3ef11305f8d2..1c489501ff57 100644 --- a/lib/math/Makefile +++ b/lib/math/Makefile @@ -5,7 +5,4 @@ obj-$(CONFIG_CORDIC) += cordic.o obj-$(CONFIG_PRIME_NUMBERS) += prime_numbers.o obj-$(CONFIG_RATIONAL) += rational.o -obj-$(CONFIG_INT_POW_TEST) += tests/int_pow_kunit.o -obj-$(CONFIG_TEST_DIV64) += test_div64.o -obj-$(CONFIG_TEST_MULDIV64) += test_mul_u64_u64_div_u64.o -obj-$(CONFIG_RATIONAL_KUNIT_TEST) += rational-test.o +obj-y += tests/ diff --git a/lib/math/tests/Makefile b/lib/math/tests/Makefile index 6a169123320a..f9a0a0e6b73a 100644 --- a/lib/math/tests/Makefile +++ b/lib/math/tests/Makefile @@ -1,3 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only -obj-$(CONFIG_INT_POW_TEST) += int_pow_kunit.o +obj-$(CONFIG_DIV64_KUNIT_TEST) += div64_kunit.o +obj-$(CONFIG_INT_POW_KUNIT_TEST) += int_pow_kunit.o +obj-$(CONFIG_MULDIV64_KUNIT_TEST) += mul_u64_u64_div_u64_kunit.o +obj-$(CONFIG_RATIONAL_KUNIT_TEST) += rational_kunit.o diff --git a/lib/math/test_div64.c b/lib/math/tests/div64_kunit.c similarity index 100% rename from lib/math/test_div64.c rename to lib/math/tests/div64_kunit.c diff --git a/lib/math/test_mul_u64_u64_div_u64.c b/lib/math/tests/mul_u64_u64_div_u64_kunit.c similarity index 98% rename from lib/math/test_mul_u64_u64_div_u64.c rename to lib/math/tests/mul_u64_u64_div_u64_kunit.c index 58d058de4e73..f61f571a0a2e 100644 --- a/lib/math/test_mul_u64_u64_div_u64.c +++ b/lib/math/tests/mul_u64_u64_div_u64_kunit.c @@ -49,7 +49,7 @@ static test_params test_values[] = { * * #!/bin/sh * sed -ne 's/^{ \+$.*$, \+$.*$, \+$.*$, \+$.*$ },$/\1 \2 \3 \4/p' \ - * lib/math/test_mul_u64_u64_div_u64.c | + * lib/math/tests/mul_u64_u64_div_u64_kunit.c | * while read a b c r; do * expected=$( printf "obase=16; ibase=16; %X * %X / %X\n" $a $b $c | bc ) * given=$( printf "%X\n" $r ) diff --git a/lib/math/rational-test.c b/lib/math/tests/rational_kunit.c similarity index 100% rename from lib/math/rational-test.c rename to lib/math/tests/rational_kunit.c -- 2.46.2

8 months, 4 weeks

2
1
0 0

[PATCH v14 0/5] KVM: arm64: Provide guest support for GCS

by Mark Brown

The arm64 Guarded Control Stack (GCS) feature provides support for hardware protected stacks of return addresses, intended to provide hardening against return oriented programming (ROP) attacks and to make it easier to gather call stacks for applications such as profiling. When GCS is active a secondary stack called the Guarded Control Stack is maintained, protected with a memory attribute which means that it can only be written with specific GCS operations. The current GCS pointer can not be directly written to by userspace. When a BL is executed the value stored in LR is also pushed onto the GCS, and when a RET is executed the top of the GCS is popped and compared to LR with a fault being raised if the values do not match. GCS operations may only be performed on GCS pages, a data abort is generated if they are not. The combination of hardware enforcement and lack of extra instructions in the function entry and exit paths should result in something which has less overhead and is more difficult to attack than a purely software implementation like clang's shadow stacks. This series implements support for managing GCS for KVM guests, it also includes a fix for S1PIE which has also been sent separately as this feature is a dependency for GCS. It is based on: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/gcs Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v14: - Rebase onto arm64/for-next/gcs which includes all the non-KVM support. - Manage the fine grained traps for GCS instructions. - Manage PSTATE.EXLOCK when delivering exceptions to KVM guests. - Link to v13: https://lore.kernel.org/r/20241001-arm64-gcs-v13-0-222b78d87eee@kernel.org Changes in v13: - Rebase onto v6.12-rc1. - Allocate VM_HIGH_ARCH_6 since protection keys used all the existing bits. - Implement mm_release() and free transparently allocated GCSs there. - Use bit 32 of AT_HWCAP for GCS due to AT_HWCAP2 being filled. - Since we now only set GCSCRE0_EL1 on change ensure that it is initialised with GCSPR_EL0 accessible to EL0. - Fix OOM handling on thread copy. - Link to v12: https://lore.kernel.org/r/20240829-arm64-gcs-v12-0-42fec947436a@kernel.org Changes in v12: - Clarify and simplify the signal handling code so we work with the register state. - When checking for write aborts to shadow stack pages ensure the fault is a data abort. - Depend on !UPROBES. - Comment cleanups. - Link to v11: https://lore.kernel.org/r/20240822-arm64-gcs-v11-0-41b81947ecb5@kernel.org Changes in v11: - Remove the dependency on the addition of clone3() support for shadow stacks, rebasing onto v6.11-rc3. - Make ID_AA64PFR1_EL1.GCS writeable in KVM. - Hide GCS registers when GCS is not enabled for KVM guests. - Require HCRX_EL2.GCSEn if booting at EL1. - Require that GCSCR_EL1 and GCSCRE0_EL1 be initialised regardless of if we boot at EL2 or EL1. - Remove some stray use of bit 63 in signal cap tokens. - Warn if we see a GCS with VM_SHARED. - Remove rdundant check for VM_WRITE in fault handling. - Cleanups and clarifications in the ABI document. - Clean up and improve documentation of some sync placement. - Only set the EL0 GCS mode if it's actually changed. - Various minor fixes and tweaks. - Link to v10: https://lore.kernel.org/r/20240801-arm64-gcs-v10-0-699e2bd2190b@kernel.org Changes in v10: - Fix issues with THP. - Tighten up requirements for initialising GCSCR*. - Only generate GCS signal frames for threads using GCS. - Only context switch EL1 GCS registers if S1PIE is enabled. - Move context switch of GCSCRE0_EL1 to EL0 context switch. - Make GCS registers unconditionally visible to userspace. - Use FHU infrastructure. - Don't change writability of ID_AA64PFR1_EL1 for KVM. - Remove unused arguments from alloc_gcs(). - Typo fixes. - Link to v9: https://lore.kernel.org/r/20240625-arm64-gcs-v9-0-0f634469b8f0@kernel.org Changes in v9: - Rebase onto v6.10-rc3. - Restructure and clarify memory management fault handling. - Fix up basic-gcs for the latest clone3() changes. - Convert to newly merged KVM ID register based feature configuration. - Fixes for NV traps. - Link to v8: https://lore.kernel.org/r/20240203-arm64-gcs-v8-0-c9fec77673ef@kernel.org Changes in v8: - Invalidate signal cap token on stack when consuming. - Typo and other trivial fixes. - Don't try to use process_vm_write() on GCS, it intentionally does not work. - Fix leak of thread GCSs. - Rebase onto latest clone3() series. - Link to v7: https://lore.kernel.org/r/20231122-arm64-gcs-v7-0-201c483bd775@kernel.org Changes in v7: - Rebase onto v6.7-rc2 via the clone3() patch series. - Change the token used to cap the stack during signal handling to be compatible with GCSPOPM. - Fix flags for new page types. - Fold in support for clone3(). - Replace copy_to_user_gcs() with put_user_gcs(). - Link to v6: https://lore.kernel.org/r/20231009-arm64-gcs-v6-0-78e55deaa4dd@kernel.org Changes in v6: - Rebase onto v6.6-rc3. - Add some more gcsb_dsync() barriers following spec clarifications. - Due to ongoing discussion around clone()/clone3() I've not updated anything there, the behaviour is the same as on previous versions. - Link to v5: https://lore.kernel.org/r/20230822-arm64-gcs-v5-0-9ef181dd6324@kernel.org Changes in v5: - Don't map any permissions for user GCSs, we always use EL0 accessors or use a separate mapping of the page. - Reduce the standard size of the GCS to RLIMIT_STACK/2. - Enforce a PAGE_SIZE alignment requirement on map_shadow_stack(). - Clarifications and fixes to documentation. - More tests. - Link to v4: https://lore.kernel.org/r/20230807-arm64-gcs-v4-0-68cfa37f9069@kernel.org Changes in v4: - Implement flags for map_shadow_stack() allowing the cap and end of stack marker to be enabled independently or not at all. - Relax size and alignment requirements for map_shadow_stack(). - Add more blurb explaining the advantages of hardware enforcement. - Link to v3: https://lore.kernel.org/r/20230731-arm64-gcs-v3-0-cddf9f980d98@kernel.org Changes in v3: - Rebase onto v6.5-rc4. - Add a GCS barrier on context switch. - Add a GCS stress test. - Link to v2: https://lore.kernel.org/r/20230724-arm64-gcs-v2-0-dc2c1d44c2eb@kernel.org Changes in v2: - Rebase onto v6.5-rc3. - Rework prctl() interface to allow each bit to be locked independently. - map_shadow_stack() now places the cap token based on the size requested by the caller not the actual space allocated. - Mode changes other than enable via ptrace are now supported. - Expand test coverage. - Various smaller fixes and adjustments. - Link to v1: https://lore.kernel.org/r/20230716-arm64-gcs-v1-0-bf567f93bba6@kernel.org --- Mark Brown (5): KVM: arm64: Expose S1PIE to guests arm64/gcs: Ensure FGTs for EL1 GCS instructions are disabled KVM: arm64: Manage GCS access and registers for guests KVM: arm64: Set PSTATE.EXLOCK when entering an exception KVM: selftests: arm64: Add GCS registers to get-reg-list arch/arm64/include/asm/el2_setup.h | 7 ++++- arch/arm64/include/asm/kvm_host.h | 12 ++++++++ arch/arm64/include/asm/vncr_mapping.h | 2 ++ arch/arm64/include/uapi/asm/ptrace.h | 2 ++ arch/arm64/kvm/hyp/exception.c | 10 +++++++ arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 31 +++++++++++++++++++ arch/arm64/kvm/sys_regs.c | 35 ++++++++++++++++++++-- tools/testing/selftests/kvm/aarch64/get-reg-list.c | 28 +++++++++++++++++ 8 files changed, 124 insertions(+), 3 deletions(-) --- base-commit: ed4983d2da8c3b66ac6d048beb242916bec83522 change-id: 20230303-arm64-gcs-e311ab0d8729 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months, 4 weeks

2
15
0 0

[PATCH] selftests: Do not skip BPF selftests by default

by Björn Töpel

From: Björn Töpel <bjorn(a)rivosinc.com> This effectively is a revert of commit 7a6eb7c34a78 ("selftests: Skip BPF seftests by default"). At the time when this was added, BPF had "build time dependencies on cutting edge versions". Since then a number of BPF capable tests has been included in net, hid, sched_ext. There is no reason not to include BPF by default in the build. Remove BPF from the selftests skiplist. Signed-off-by: Björn Töpel <bjorn(a)rivosinc.com> --- tools/testing/selftests/Makefile | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..88f59a5fef96 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -129,10 +129,8 @@ ifeq ($(filter net/lib,$(TARGETS)),) endif endif -# User can optionally provide a TARGETS skiplist. By default we skip -# BPF since it has cutting edge build time dependencies which require -# more effort to install. -SKIP_TARGETS ?= bpf +# User can optionally provide a TARGETS skiplist. +SKIP_TARGETS ?= ifneq ($(SKIP_TARGETS),) TMP := $(filter-out $(SKIP_TARGETS), $(TARGETS)) override TARGETS := $(TMP) base-commit: 0c559323bbaabee7346c12e74b497e283aaafef5 -- 2.43.0

9 months

3
6
0 0

[GIT PULL] Kselftest fixes update for Linux 6.12-rc2

by Shuah Khan

Hi Linus, Please pull this kselftest fixes update for Linux 6.12-rc2. This kselftest fixes update for Linux 6.12-rc2 consists of fixes to build warnings, install scripts, run-time error path, and git status cleanups to tests: -- devices/probe: fix for Python3 regex string syntax warnings -- clone3: removing unused macro from clone3_cap_checkpoint_restore() -- vDSO: fix to align getrandom states to cache line -- core and exec: add missing executables to .gitignore files -- rtc: change to skip test if /dev/rtc0 can't be accessed -- timers/posix: fix warn_unused_result result in __fatal_error() -- breakpoints: fix to detect suspend successful condition correctly -- hid: fix to install required dependencies to run the test diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit 9852d85ec9d492ebef56dc5f229416c925758edc: Linux 6.12-rc1 (2024-09-29 15:06:19 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux_kselftest-fixes-6.12-rc2 for you to fetch changes up to c66be905cda24fb782b91053b196bd2e966f95b7: selftests: breakpoints: use remaining time to check if suspend succeed (2024-10-02 14:37:30 -0600) ---------------------------------------------------------------- linux_kselftest-fixes-6.12-rc2 This kselftest fixes update for Linux 6.12-rc2 consists of fixes to build warnings, install scripts, run-time error path, and git status cleanups to tests: -- devices/probe: fix for Python3 regex string syntax warnings -- clone3: removing unused macro from clone3_cap_checkpoint_restore() -- vDSO: fix to align getrandom states to cache line -- core and exec: add missing executables to .gitignore files -- rtc: change to skip test if /dev/rtc0 can't be accessed -- timers/posix: fix warn_unused_result result in __fatal_error() -- breakpoints: fix to detect suspend successful condition correctly -- hid: fix to install required dependencies to run the test ---------------------------------------------------------------- Alessandro Zanni (1): kselftest/devices/probe: Fix SyntaxWarning in regex strings for Python3 Ba Jing (1): clone3: clone3_cap_checkpoint_restore: remove unused MAX_PID_NS_LEVEL macro Jason A. Donenfeld (1): selftests: vDSO: align getrandom states to cache line Javier Carrasco (2): selftests: core: add unshare_test to gitignore selftests: exec: update gitignore for load_address Joseph Jang (1): selftest: rtc: Check if could access /dev/rtc0 before testing Shuah Khan (1): selftests:timers: posix_timers: Fix warn_unused_result in __fatal_error() Yifei Liu (1): selftests: breakpoints: use remaining time to check if suspend succeed Yun Lu (1): selftest: hid: add missing run-hid-tools-tests.sh .../testing/selftests/breakpoints/step_after_suspend_test.c | 5 ++++- .../testing/selftests/clone3/clone3_cap_checkpoint_restore.c | 2 -- tools/testing/selftests/core/.gitignore | 1 + .../selftests/devices/probe/test_discoverable_devices.py | 4 ++-- tools/testing/selftests/exec/.gitignore | 3 ++- tools/testing/selftests/hid/Makefile | 2 ++ tools/testing/selftests/rtc/rtctest.c | 11 ++++++++++- tools/testing/selftests/timers/posix_timers.c | 12 ++++++++---- tools/testing/selftests/vDSO/vdso_test_getrandom.c | 8 +++++--- 9 files changed, 34 insertions(+), 14 deletions(-) ----------------------------------------------------------------

9 months

2
1
0 0

[PATCH net-next v2 0/2] selftests: net: ioam: add tunsrc support

by Justin Iurman

v2: - v1 missed the merge window, so while we're at it... - split changes into two patches instead of one for readability (#1 removes the ioam selftests, #2 adds the updated ioam selftests) TL;DR This patch comes from a discussion we had with Jakub and Paolo on aligning the ioam selftests with its new "tunsrc" feature. This patch updates the IOAM selftests to support the new "tunsrc" feature of IOAM. As a consequence, some changes were required. For example, the IPv6 header must be accessed to check some fields (i.e., the source address for the "tunsrc" feature), which is not possible AFAIK with IPv6 raw sockets. The latter is currently used with IPV6_RECVHOPOPTS and was introduced by commit 187bbb6968af ("selftests: ioam: refactoring to align with the fix") to fix an issue. But, we really need packet sockets actually... which is one of the changes in this patch (see the description of the topology at the top of ioam6.sh for explanations). Another change is that all IPv6 addresses used in the topology are now based on the documentation prefix (2001:db8::/32). Also, the tests have been improved and there are now many more of them. Overall, the script is more robust. Justin Iurman (2): selftests: net: remove ioam tests selftests: net: add new ioam tests tools/testing/selftests/net/ioam6.sh | 1832 +++++++++++++++----- tools/testing/selftests/net/ioam6_parser.c | 1087 ++++++++---- 2 files changed, 2129 insertions(+), 790 deletions(-) -- 2.34.1

9 months

2
3
0 0

[PATCH net-next] selftest/ptp: update ptp selftest to exercise the gettimex options

by Mahesh Bandewar

With the inclusion of commit c259acab839e ("ptp/ioctl: support MONOTONIC{,_RAW} timestamps for PTP_SYS_OFFSET_EXTENDED") clock_gettime() now allows retrieval of pre/post timestamps for CLOCK_MONOTONIC and CLOCK_MONOTONIC_RAW timebases along with the previously supported CLOCK_REALTIME. This patch adds a command line option 'y' to the testptp program to choose one of the allowed timebases [realtime aka system, monotonic, and monotonic-raw). Signed-off-by: Mahesh Bandewar <maheshb(a)google.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Richard Cochran <richardcochran(a)gmail.com> Cc: "David S. Miller" <davem(a)davemloft.net> Cc: Jakub Kicinski <kuba(a)kernel.org> --- tools/testing/selftests/ptp/testptp.c | 62 ++++++++++++++++++++++++--- 1 file changed, 57 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/ptp/testptp.c b/tools/testing/selftests/ptp/testptp.c index 011252fe238c..58064151f2c8 100644 --- a/tools/testing/selftests/ptp/testptp.c +++ b/tools/testing/selftests/ptp/testptp.c @@ -146,6 +146,7 @@ static void usage(char *progname) " -T val set the ptp clock time to 'val' seconds\n" " -x val get an extended ptp clock time with the desired number of samples (up to %d)\n" " -X get a ptp clock cross timestamp\n" + " -y val pre/post tstamp timebase to use {realtime|monotonic|monotonic-raw}\n" " -z test combinations of rising/falling external time stamp flags\n", progname, PTP_MAX_SAMPLES); } @@ -189,6 +190,7 @@ int main(int argc, char *argv[]) int seconds = 0; int settime = 0; int channel = -1; + clockid_t ext_clockid = CLOCK_REALTIME; int64_t t1, t2, tp; int64_t interval, offset; @@ -198,7 +200,7 @@ int main(int argc, char *argv[]) progname = strrchr(argv[0], '/'); progname = progname ? 1+progname : argv[0]; - while (EOF != (c = getopt(argc, argv, "cd:e:f:F:ghH:i:k:lL:n:o:p:P:sSt:T:w:x:Xz"))) { + while (EOF != (c = getopt(argc, argv, "cd:e:f:F:ghH:i:k:lL:n:o:p:P:sSt:T:w:x:Xy:z"))) { switch (c) { case 'c': capabilities = 1; @@ -278,6 +280,21 @@ int main(int argc, char *argv[]) case 'X': getcross = 1; break; + case 'y': + if (!strcasecmp(optarg, "realtime")) + ext_clockid = CLOCK_REALTIME; + else if (!strcasecmp(optarg, "monotonic")) + ext_clockid = CLOCK_MONOTONIC; + else if (!strcasecmp(optarg, "monotonic-raw")) + ext_clockid = CLOCK_MONOTONIC_RAW; + else { + fprintf(stderr, + "type needs to be realtime, monotonic or monotonic-raw; was given %s\n", + optarg); + return -1; + } + break; + case 'z': flagtest = 1; break; @@ -566,6 +583,7 @@ int main(int argc, char *argv[]) } soe->n_samples = getextended; + soe->clockid = ext_clockid; if (ioctl(fd, PTP_SYS_OFFSET_EXTENDED, soe)) { perror("PTP_SYS_OFFSET_EXTENDED"); @@ -574,12 +592,46 @@ int main(int argc, char *argv[]) getextended); for (i = 0; i < getextended; i++) { - printf("sample #%2d: system time before: %lld.%09u\n", - i, soe->ts[i][0].sec, soe->ts[i][0].nsec); + switch (ext_clockid) { + case CLOCK_REALTIME: + printf("sample #%2d: real time before: %lld.%09u\n", + i, soe->ts[i][0].sec, + soe->ts[i][0].nsec); + break; + case CLOCK_MONOTONIC: + printf("sample #%2d: monotonic time before: %lld.%09u\n", + i, soe->ts[i][0].sec, + soe->ts[i][0].nsec); + break; + case CLOCK_MONOTONIC_RAW: + printf("sample #%2d: monotonic-raw time before: %lld.%09u\n", + i, soe->ts[i][0].sec, + soe->ts[i][0].nsec); + break; + default: + break; + } printf(" phc time: %lld.%09u\n", soe->ts[i][1].sec, soe->ts[i][1].nsec); - printf(" system time after: %lld.%09u\n", - soe->ts[i][2].sec, soe->ts[i][2].nsec); + switch (ext_clockid) { + case CLOCK_REALTIME: + printf(" real time after: %lld.%09u\n", + soe->ts[i][2].sec, + soe->ts[i][2].nsec); + break; + case CLOCK_MONOTONIC: + printf(" monotonic time after: %lld.%09u\n", + soe->ts[i][2].sec, + soe->ts[i][2].nsec); + break; + case CLOCK_MONOTONIC_RAW: + printf(" monotonic-raw time after: %lld.%09u\n", + soe->ts[i][2].sec, + soe->ts[i][2].nsec); + break; + default: + break; + } } } -- 2.46.1.824.gd892dcdcdd-goog

9 months

3
2
0 0

[PATCH net v5] selftests: net: no_forwarding: fix VID for $swp2 in one_bridge_two_pvids() test

by Kacper Ludwinski

Currently, the second bridge command overwrites the first one. Fix this by adding this VID to the interface behind $swp2. The one_bridge_two_pvids() test intends to check that there is no leakage of traffic between bridge ports which have a single VLAN - the PVID VLAN. Because of a typo, port $swp1 is configured with a PVID twice (second command overwrites first), and $swp2 isn't configured at all (and since the bridge vlan_default_pvid property is set to 0, this port will not have a PVID at all, so it will drop all untagged and priority-tagged traffic). So, instead of testing the configuration that was intended, we are testing a different one, where one port has PVID 2 and the other has no PVID. This incorrect version of the test should also pass, but is ineffective for its purpose, so fix the typo. This typo has an impact on results of the test, potentially leading to wrong conclusions regarding the functionality of a network device. The tests results: TEST: Switch ports in VLAN-aware bridge with different PVIDs: Unicast non-IP untagged [ OK ] Multicast non-IP untagged [ OK ] Broadcast non-IP untagged [ OK ] Unicast IPv4 untagged [ OK ] Multicast IPv4 untagged [ OK ] Unicast IPv6 untagged [ OK ] Multicast IPv6 untagged [ OK ] Unicast non-IP VID 1 [ OK ] Multicast non-IP VID 1 [ OK ] Broadcast non-IP VID 1 [ OK ] Unicast IPv4 VID 1 [ OK ] Multicast IPv4 VID 1 [ OK ] Unicast IPv6 VID 1 [ OK ] Multicast IPv6 VID 1 [ OK ] Unicast non-IP VID 4094 [ OK ] Multicast non-IP VID 4094 [ OK ] Broadcast non-IP VID 4094 [ OK ] Unicast IPv4 VID 4094 [ OK ] Multicast IPv4 VID 4094 [ OK ] Unicast IPv6 VID 4094 [ OK ] Multicast IPv6 VID 4094 [ OK ] Fixes: 476a4f05d9b8 ("selftests: forwarding: add a no_forwarding.sh test") Reviewed-by: Hangbin Liu <liuhangbin(a)gmail.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Kacper Ludwinski <kac.ludwinski(a)icloud.com> --- tools/testing/selftests/net/forwarding/no_forwarding.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) v5: - Add test results impacted by the changes - Fix typo in commit message v4: - Add revision history od this patch - Add "Reviewed-by:" - Limit number of characters in commit to 80 - Add impact explanation to commit message - Link: https://lore.kernel.org/linux-kselftest/20240930063543.94247-1-kac.ludwinsk… v3: - Edit commit message - Add missing Signed-off-by - Link: https://lore.kernel.org/linux-kselftest/20240927112824.339-1-kac.ludwinski@… v2: - Add missing CCs - Fix typo in commit message - Add target name - Link: https://lore.kernel.org/linux-kselftest/fQknN_r6POzmrp8UVjyA3cknLnB1HB9I_jf… v1: - Link: https://lore.kernel.org/linux-kselftest/20240925050539.1906-1-kacper@ludwin… diff --git a/tools/testing/selftests/net/forwarding/no_forwarding.sh b/tools/testing/selftests/net/forwarding/no_forwarding.sh index 9e677aa64a06..694ece9ba3a7 100755 --- a/tools/testing/selftests/net/forwarding/no_forwarding.sh +++ b/tools/testing/selftests/net/forwarding/no_forwarding.sh @@ -202,7 +202,7 @@ one_bridge_two_pvids() ip link set $swp2 master br0 bridge vlan add dev $swp1 vid 1 pvid untagged - bridge vlan add dev $swp1 vid 2 pvid untagged + bridge vlan add dev $swp2 vid 2 pvid untagged run_test "Switch ports in VLAN-aware bridge with different PVIDs" -- 2.43.0

9 months

2
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[PATCH V2 00/13] selftests/resctrl: Support diverse platforms with MBM and MBA tests

by Reinette Chatre

Changes since V1: - V1: https://lore.kernel.org/cover.1724970211.git.reinette.chatre@intel.com/ - V2 contains the same general solutions to stated problem as V1 but these are now preceded by more fixes (patches 1 to 5) and improved robustness (patches 6 to 9) to existing tests before the series gets back to solving the original problem with more confidence in patches 10 to 13. - The posibility of making "memflush = false" for CMT test was discussed during V1. Modifying this setting does not have a significant impact on the observed results that are already well within acceptable range and this version thus keeps original default. If performance was a goal it may be possible to do further experimentation where "memflush = false" could eliminate the need for the sleep(1) within the test wrapper, but improving the performance is not a goal of this work. - (New) Support what seems to be unintended ability for user space to provide parameters to "fill_buf" by making the parsing robust and only support changing parameters that are supported to be changed. Drop support for "write" operation since it has never been measured. - (New) Improve wraparound handling. (Ilpo) - (New) A couple of new fixes addressing issues discovered during development. - (Change from V1) To support fill_buf parameters provided by user space as well as test specific fill_buf parameters struct fill_buf_param is no longer just a member of struct resctrl_val_param, instead there could be at most two instances of struct fill_buf_param, the immutable parameters provided by user space and the parameters used by individual tests. (Ilpo) - Please see individual patches for detailed changes. V1 cover: The resctrl selftests for Memory Bandwidth Allocation (MBA) and Memory Bandwidth Monitoring (MBM) are failing on some (for example [1]) Emerald Rapids systems. The test failures result from the following two properties of these systems: 1) Emerald Rapids systems can have up to 320MB L3 cache. The resctrl MBA and MBM selftests measure memory traffic for which a hardcoded 250MB buffer has been sufficient so far. On platforms with L3 cache larger than the buffer, the buffer fits in the L3 cache and thus no/very little memory traffic is generated during the "memory bandwidth" tests. 2) Some platform features, for example RAS features or memory performance features that generate memory traffic may drive accesses that are counted differently by performance counters and MBM respectively, for instance generating "overhead" traffic which is not counted against any specific RMID. Until now these counting differences have always been "in the noise". On Emerald Rapids systems the maximum MBA throttling (10% memory bandwidth) throttles memory bandwidth to where memory accesses by these other platform features push the memory bandwidth difference between memory controller performance counters and resctrl (MBM) beyond the tests' hardcoded tolerance. Make the tests more robust against platform variations: 1) Let the buffer used by memory bandwidth tests be guided by the size of the L3 cache. 2) Larger buffers require longer initialization time before the buffer can be used to measurement. Rework the tests to ensure that buffer initialization is complete before measurements start. 3) Do not compare performance counters and MBM measurements at low bandwidth. The value of "low" is hardcoded to 750MiB based on measurements on Emerald Rapids, Sapphire Rapids, and Ice Lake systems. This limit is not applicable to AMD systems since it only applies to the MBA and MBM tests that are isolated to Intel. [1] https://ark.intel.com/content/www/us/en/ark/products/237261/intel-xeon-plat… Reinette Chatre (13): selftests/resctrl: Make functions only used in same file static selftests/resctrl: Print accurate buffer size as part of MBM results selftests/resctrl: Fix memory overflow due to unhandled wraparound selftests/resctrl: Protect against array overrun during iMC config parsing selftests/resctrl: Make wraparound handling obvious selftests/resctrl: Remove "once" parameter required to be false selftests/resctrl: Only support measured read operation selftests/resctrl: Remove unused measurement code selftests/resctrl: Make benchmark parameter passing robust selftests/resctrl: Ensure measurements skip initialization of default benchmark selftests/resctrl: Use cache size to determine "fill_buf" buffer size selftests/resctrl: Do not compare performance counters and resctrl at low bandwidth selftests/resctrl: Keep results from first test run tools/testing/selftests/resctrl/cmt_test.c | 37 +- tools/testing/selftests/resctrl/fill_buf.c | 40 +- tools/testing/selftests/resctrl/mba_test.c | 52 +- tools/testing/selftests/resctrl/mbm_test.c | 38 +- tools/testing/selftests/resctrl/resctrl.h | 73 ++- .../testing/selftests/resctrl/resctrl_tests.c | 95 +++- tools/testing/selftests/resctrl/resctrl_val.c | 445 +++++------------- tools/testing/selftests/resctrl/resctrlfs.c | 17 - 8 files changed, 339 insertions(+), 458 deletions(-) -- 2.46.0

9 months

2
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kselftest/next build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc1-3-gedd435390c554)

by kernelci.org bot

kselftest/next build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc1-3-gedd435390c554) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/v6.12-rc1-3-gedd435… Tree: kselftest Branch: next Git Describe: v6.12-rc1-3-gedd435390c554 Git Commit: edd435390c5542af4634a8ed8f3b0bdb34ea4987 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

9 months

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[PATCH v2] lib/crc16_kunit.c: add KUnit tests for crc16

by Vinicius Peixoto

Add Kunit tests for the kernel's implementation of the standard CRC-16 algorithm (<linux/crc16.h>). The test data consists of 100 randomly-generated test cases, validated against a naive CRC-16 implementation. This test follows roughly the same logic as lib/crc32test.c, but without the performance measurements. Signed-off-by: Vinicius Peixoto <vpeixoto(a)lkcamp.dev> Co-developed-by: Enzo Bertoloti <ebertoloti(a)lkcamp.dev> Signed-off-by: Enzo Bertoloti <ebertoloti(a)lkcamp.dev> Co-developed-by: Fabricio Gasperin <fgasperin(a)lkcamp.dev> Signed-off-by: Fabricio Gasperin <fgasperin(a)lkcamp.dev> Suggested-by: David Laight <David.Laight(a)ACULAB.COM> --- Hi all, This patch was developed during a hackathon organized by LKCAMP [1], with the objective of writing KUnit tests, both to introduce people to the kernel development process and to learn about different subsystems (with the positive side effect of improving the kernel test coverage, of course). We noticed there were tests for CRC32 in lib/crc32test.c and thought it would be nice to have something similar for CRC16, since it seems to be widely used in network drivers (as well as in some ext4 code). We would really appreciate any feedback/suggestions on how to improve this. Thanks! :-) Link to v1: https://lore.kernel.org/linux-kselftest/20240922232643.535329-1-vpeixoto@lk… Changes in v2 (suggested by David Laight): - Use the PRNG from include/linux/prandom.h to generate pseudorandom data/test cases instead of having them hardcoded as large static arrays - Add a naive CRC16 implementation used to validate the kernel's implementation (instead of having the test case results be hard-coded) [1] https://lkcamp.dev/about --- lib/Kconfig.debug | 9 +++ lib/Makefile | 1 + lib/crc16_kunit.c | 165 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 175 insertions(+) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7315f643817ae1021f1e4b3dd27b424f49e3f761..f9617e3054948ce43090f524dc67650e9549cee8 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2850,6 +2850,15 @@ config USERCOPY_KUNIT_TEST on the copy_to/from_user infrastructure, making sure basic user/kernel boundary testing is working. +config CRC16_KUNIT_TEST + tristate "KUnit tests for CRC16" + depends on KUNIT + default KUNIT_ALL_TESTS + select CRC16 + help + Enable this option to run unit tests for the kernel's CRC16 + implementation (<linux/crc16.h>). + config TEST_UDELAY tristate "udelay test driver" help diff --git a/lib/Makefile b/lib/Makefile index 773adf88af41665b2419202e5427e0513c6becae..1faed6414a85fd366b4966a00e8ba231d7546e14 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -389,6 +389,7 @@ CFLAGS_fortify_kunit.o += $(DISABLE_STRUCTLEAK_PLUGIN) obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o obj-$(CONFIG_USERCOPY_KUNIT_TEST) += usercopy_kunit.o +obj-$(CONFIG_CRC16_KUNIT_TEST) += crc16_kunit.o obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o diff --git a/lib/crc16_kunit.c b/lib/crc16_kunit.c new file mode 100644 index 0000000000000000000000000000000000000000..7a79989815c451a21210d463729436fcc620d6b3 --- /dev/null +++ b/lib/crc16_kunit.c @@ -0,0 +1,165 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnits tests for CRC16. + * + * Copyright (C) 2024, LKCAMP + * Author: Vinicius Peixoto <vpeixoto(a)lkcamp.dev> + * Author: Fabricio Gasperin <fgasperin(a)lkcamp.dev> + * Author: Enzo Bertoloti <ebertoloti(a)lkcamp.dev> + */ +#include <kunit/test.h> +#include <linux/crc16.h> +#include <linux/prandom.h> + +#define CRC16_KUNIT_DATA_SIZE 4096 +#define CRC16_KUNIT_TEST_SIZE 100 +#define CRC16_KUNIT_SEED 0x12345678 + +/** + * struct crc16_test - CRC16 test data + * @crc: initial input value to CRC16 + * @start: Start index within the data buffer + * @length: Length of the data + * @crc16: Expected CRC16 value for the test + */ +static struct crc16_test { + u16 crc; + u16 start; + u16 length; +} tests[CRC16_KUNIT_TEST_SIZE]; + +u8 data[CRC16_KUNIT_DATA_SIZE]; + + +/* Naive implementation of CRC16 for validation purposes */ +static inline u16 _crc16_naive_byte(u16 crc, u8 data) +{ + u8 i = 0; + + crc ^= (u16) data; + for (i = 0; i < 8; i++) { + if (crc & 0x01) + crc = (crc >> 1) ^ 0xa001; + else + crc = crc >> 1; + } + + return crc; +} + + +static inline u16 _crc16_naive(u16 crc, u8 *buffer, size_t len) +{ + while (len--) + crc = _crc16_naive_byte(crc, *buffer++); + return crc; +} + + +/* Small helper for generating pseudorandom 16-bit data */ +static inline u16 _rand16(void) +{ + static u32 rand = CRC16_KUNIT_SEED; + + rand = next_pseudo_random32(rand); + return rand & 0xFFFF; +} + + +static int crc16_init_test_data(struct kunit_suite *suite) +{ + size_t i; + + /* Fill the data buffer with random bytes */ + for (i = 0; i < CRC16_KUNIT_DATA_SIZE; i++) + data[i] = _rand16() & 0xFF; + + /* Generate random test data while ensuring the random + * start + length values won't overflow the 4096-byte + * buffer (0x7FF * 2 = 0xFFE < 0x1000) + */ + for (size_t i = 0; i < CRC16_KUNIT_TEST_SIZE; i++) { + tests[i].crc = _rand16(); + tests[i].start = _rand16() & 0x7FF; + tests[i].length = _rand16() & 0x7FF; + } + + return 0; +} + +/** + * crc16_test_empty - Test crc16 with empty data + * + * Test crc16 with empty data, the result should be the same as the initial crc + */ +static void crc16_test_empty(struct kunit *test) +{ + u16 crc; + + crc = crc16(0x00, data, 0); + KUNIT_EXPECT_EQ(test, crc, 0); + crc = crc16(0xFF, data, 0); + KUNIT_EXPECT_EQ(test, crc, 0xFF); +} + +/** + * crc16_test_correctness - Test crc16 + * + * Test crc16 against a naive implementation + */ +static void crc16_test_correctness(struct kunit *test) +{ + size_t i; + u16 crc, crc_naive; + + for (i = 0; i < CRC16_KUNIT_TEST_SIZE; i++) { + crc = crc16(tests[i].crc, data + tests[i].start, + tests[i].length); + crc_naive = _crc16_naive(tests[i].crc, data + tests[i].start, + tests[i].length); + KUNIT_EXPECT_EQ(test, crc, crc_naive); + } +} + + +/** + * crc16_test_combine - Test split crc16 calculations + * + * Test crc16 with data split in two parts, the result should be the same as + * crc16 with the data combined + */ +static void crc16_test_combine(struct kunit *test) +{ + size_t i, j; + u16 crc, crc_naive; + + for (i = 0; i < CRC16_KUNIT_TEST_SIZE; i++) { + crc_naive = crc16(tests[i].crc, data + tests[i].start, tests[i].length); + for (j = 0; j < tests[i].length; j++) { + crc = crc16(tests[i].crc, data + tests[i].start, j); + crc = crc16(crc, data + tests[i].start + j, tests[i].length - j); + KUNIT_EXPECT_EQ(test, crc, crc_naive); + } + } +} + + +static struct kunit_case crc16_test_cases[] = { + KUNIT_CASE(crc16_test_empty), + KUNIT_CASE(crc16_test_combine), + KUNIT_CASE(crc16_test_correctness), + {}, +}; + +static struct kunit_suite crc16_test_suite = { + .name = "crc16", + .test_cases = crc16_test_cases, + .suite_init = crc16_init_test_data, +}; +kunit_test_suite(crc16_test_suite); + +MODULE_AUTHOR("Fabricio Gasperin <fgasperin(a)lkcamp.dev>"); +MODULE_AUTHOR("Vinicius Peixoto <vpeixoto(a)lkcamp.dev>"); +MODULE_AUTHOR("Enzo Bertoloti <ebertoloti(a)lkcamp.dev>"); +MODULE_DESCRIPTION("Unit tests for crc16"); +MODULE_LICENSE("GPL"); --- base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc change-id: 20241003-crc16-kunit-127a4dc2b72c Best regards, -- Vinicius Peixoto <vpeixoto(a)lkcamp.dev>

9 months

2
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[PATCH] docs: dev-tools: Add documentation for the device focused kselftests

by Nícolas F. R. A. Prado

Add documentation for the kselftests focused on testing devices and point to it from the kselftest documentation. There are multiple tests in this category so the aim of this page is to make it clear when to run each test. Signed-off-by: Nícolas F. R. A. Prado <nfraprado(a)collabora.com> --- This patch depends on patch "kselftest: devices: Add test to detect missing devices" [1], since this patch documents that test. [1] https://lore.kernel.org/all/20240928-kselftest-dev-exist-v2-1-fab07de6b80b@… --- Documentation/dev-tools/kselftest.rst | 9 ++++++ Documentation/dev-tools/testing-devices.rst | 47 +++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+) diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst index f3766e326d1e..fdb1df86783a 100644 --- a/Documentation/dev-tools/kselftest.rst +++ b/Documentation/dev-tools/kselftest.rst @@ -31,6 +31,15 @@ kselftest runs as a userspace process. Tests that can be written/run in userspace may wish to use the `Test Harness`_. Tests that need to be run in kernel space may wish to use a `Test Module`_. +Documentation on the tests +========================== + +For documentation on the kselftests themselves, see: + +.. toctree:: + + testing-devices + Running the selftests (hotplug tests are run in limited mode) ============================================================= diff --git a/Documentation/dev-tools/testing-devices.rst b/Documentation/dev-tools/testing-devices.rst new file mode 100644 index 000000000000..ab26adb99051 --- /dev/null +++ b/Documentation/dev-tools/testing-devices.rst @@ -0,0 +1,47 @@ +.. SPDX-License-Identifier: GPL-2.0 +.. Copyright (c) 2024 Collabora Ltd + +============================= +Device testing with kselftest +============================= + + +There are a few different kselftests available for testing devices generically, +with some overlap in coverage and different requirements. This document aims to +give an overview of each one. + +Note: Paths in this document are relative to the kselftest folder +(``tools/testing/selftests``). + +Device oriented kselftests: + +* Devicetree (``dt``) + + * **Coverage**: Probe status for devices described in Devicetree + * **Requirements**: None + +* Error logs (``devices/error_logs``) + + * **Coverage**: Error (or more critical) log messages presence coming from any + device + * **Requirements**: None + +* Discoverable bus (``devices/probe``) + + * **Coverage**: Presence and probe status of USB or PCI devices that have been + described in the reference file + * **Requirements**: Manually describe the devices that should be tested in a + YAML reference file (see ``devices/probe/boards/google,spherion.yaml`` for + an example) + +* Exist (``devices/exist``) + + * **Coverage**: Presence of all devices + * **Requirements**: Generate the reference (see ``devices/exist/README.rst`` + for details) on a known-good kernel + +Therefore, the suggestion is to enable the error log and devicetree tests on all +(DT-based) platforms, since they don't have any requirements. Then to greatly +improve coverage, generate the reference for each platform and enable the exist +test. The discoverable bus test can be used to verify the probe status of +specific USB or PCI devices, but is probably not worth it for most cases. --- base-commit: cea5425829f77e476b03702426f6b3701299b925 change-id: 20241001-kselftest-device-docs-6c8a411109b5 Best regards, -- Nícolas F. R. A. Prado <nfraprado(a)collabora.com>

9 months

3
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[PATCH] selftests: sched_ext: Add sched_ext as proper selftest target

by Björn Töpel

From: Björn Töpel <bjorn(a)rivosinc.com> The sched_ext selftests is missing proper cross-compilation support, a proper target entry, and out-of-tree build support. When building the kselftest suite, e.g.: make ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu- \ SKIP_TARGETS="" O=/output/foo -C tools/testing/selftests install The expectation is that the sched_ext is included, cross-built, and placed into /output/foo. Add CROSS_COMPILE, OUTPUT, and TARGETS support to the sched_ext selftest. Signed-off-by: Björn Töpel <bjorn(a)rivosinc.com> --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/sched_ext/Makefile | 59 +++++++++++++++------- 2 files changed, 41 insertions(+), 19 deletions(-) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..20ee8a0b795c 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -88,6 +88,7 @@ TARGETS += rlimits TARGETS += rseq TARGETS += rtc TARGETS += rust +TARGETS += sched_ext TARGETS += seccomp TARGETS += sgx TARGETS += sigaltstack diff --git a/tools/testing/selftests/sched_ext/Makefile b/tools/testing/selftests/sched_ext/Makefile index 0754a2c110a1..66467a99184d 100644 --- a/tools/testing/selftests/sched_ext/Makefile +++ b/tools/testing/selftests/sched_ext/Makefile @@ -13,14 +13,8 @@ LLVM_SUFFIX := $(LLVM) endif CC := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) $(CLANG_FLAGS) -fintegrated-as -else -CC := gcc endif # LLVM -ifneq ($(CROSS_COMPILE),) -$(error CROSS_COMPILE not supported for scx selftests) -endif # CROSS_COMPILE - CURDIR := $(abspath .) REPOROOT := $(abspath ../../../..) TOOLSDIR := $(REPOROOT)/tools @@ -34,18 +28,39 @@ GENHDR := $(GENDIR)/autoconf.h SCXTOOLSDIR := $(TOOLSDIR)/sched_ext SCXTOOLSINCDIR := $(TOOLSDIR)/sched_ext/include -OUTPUT_DIR := $(CURDIR)/build +ifeq (,$(OUTPUT)) +OUTPUT := $(CURDIR)/build +RUNNER_DIR := $(CURDIR) +else +OUTPUT_DIR := $(OUTPUT) +RUNNER_DIR := $(OUTPUT) +endif OBJ_DIR := $(OUTPUT_DIR)/obj INCLUDE_DIR := $(OUTPUT_DIR)/include BPFOBJ_DIR := $(OBJ_DIR)/libbpf SCXOBJ_DIR := $(OBJ_DIR)/sched_ext BPFOBJ := $(BPFOBJ_DIR)/libbpf.a LIBBPF_OUTPUT := $(OBJ_DIR)/libbpf/libbpf.a -DEFAULT_BPFTOOL := $(OUTPUT_DIR)/sbin/bpftool HOST_BUILD_DIR := $(OBJ_DIR) HOST_OUTPUT_DIR := $(OUTPUT_DIR) -VMLINUX_BTF_PATHS ?= ../../../../vmlinux \ +ifneq ($(CROSS_COMPILE),) +DEFAULT_BPFTOOL := $(OUTPUT_DIR)/host/sbin/bpftool +HOST_OBJ_DIR := $(OBJ_DIR)/host/bpftool +HOST_LIBBPF_OUTPUT := $(OBJ_DIR)/host/libbpf/ +HOST_LIBBPF_DESTDIR := $(OUTPUT_DIR)/host/ +HOST_DESTDIR := $(OUTPUT_DIR)/host/ +else +DEFAULT_BPFTOOL := $(OUTPUT_DIR)/sbin/bpftool +HOST_OBJ_DIR := $(OBJ_DIR)/bpftool +HOST_LIBBPF_OUTPUT := $(OBJ_DIR)/libbpf/ +HOST_LIBBPF_DESTDIR := $(OUTPUT_DIR)/ +HOST_DESTDIR := $(OUTPUT_DIR)/ +endif + +VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ + $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ + ../../../../vmlinux \ /sys/kernel/btf/vmlinux \ /boot/vmlinux-$(shell uname -r) VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) @@ -80,17 +95,23 @@ IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \ # Use '-idirafter': Don't interfere with include mechanics except where the # build would have failed anyways. define get_sys_includes -$(shell $(1) -v -E - </dev/null 2>&1 \ +$(shell $(1) $(2) -v -E - </dev/null 2>&1 \ | sed -n '/<...> search starts here:/,/End of search list./{ s| $/.*$|-idirafter \1|p }') \ -$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') +$(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') endef +ifneq ($(CROSS_COMPILE),) +CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%)) +endif + +CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH)) + BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) \ $(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) \ -I$(CURDIR)/include -I$(CURDIR)/include/bpf-compat \ -I$(INCLUDE_DIR) -I$(APIDIR) -I$(SCXTOOLSINCDIR) \ -I$(REPOROOT)/include \ - $(call get_sys_includes,$(CLANG)) \ + $(CLANG_SYS_INCLUDES) \ -Wall -Wno-compare-distinct-pointer-types \ -Wno-incompatible-function-pointer-types \ -O2 -mcpu=v3 @@ -98,7 +119,7 @@ BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) \ # sort removes libbpf duplicates when not cross-building MAKE_DIRS := $(sort $(OBJ_DIR)/libbpf $(OBJ_DIR)/libbpf \ $(OBJ_DIR)/bpftool $(OBJ_DIR)/resolve_btfids \ - $(INCLUDE_DIR) $(SCXOBJ_DIR)) + $(HOST_OBJ_DIR) $(INCLUDE_DIR) $(SCXOBJ_DIR)) $(MAKE_DIRS): $(call msg,MKDIR,,$@) @@ -112,14 +133,14 @@ $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ DESTDIR=$(OUTPUT_DIR) prefix= all install_headers $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ - $(LIBBPF_OUTPUT) | $(OBJ_DIR)/bpftool + $(LIBBPF_OUTPUT) | $(HOST_OBJ_DIR) $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \ EXTRA_CFLAGS='-g -O0' \ - OUTPUT=$(OBJ_DIR)/bpftool/ \ - LIBBPF_OUTPUT=$(OBJ_DIR)/libbpf/ \ - LIBBPF_DESTDIR=$(OUTPUT_DIR)/ \ - prefix= DESTDIR=$(OUTPUT_DIR)/ install-bin + OUTPUT=$(HOST_OBJ_DIR)/ \ + LIBBPF_OUTPUT=$(HOST_LIBBPF_OUTPUT) \ + LIBBPF_DESTDIR=$(HOST_LIBBPF_DESTDIR) \ + prefix= DESTDIR=$(HOST_DESTDIR) install-bin $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR) ifeq ($(VMLINUX_H),) @@ -203,7 +224,7 @@ $(SCXOBJ_DIR)/util.o: util.c | $(SCXOBJ_DIR) runner: $(SCXOBJ_DIR)/runner.o $(SCXOBJ_DIR)/util.o $(BPFOBJ) $(testcase-targets) @echo "$(testcase-targets)" - $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) + $(CC) $(CFLAGS) -o $(RUNNER_DIR)/$@ $^ $(LDFLAGS) TEST_GEN_PROGS := runner base-commit: 0c559323bbaabee7346c12e74b497e283aaafef5 -- 2.43.0

9 months

3
3
0 0

[PATCH v5 0/3] tracing: Support poll on event hist file

by Masami Hiramatsu (Google)

Hi, Here is the v5 patch to support polling on event 'hist' file. The previous version is here; https://lore.kernel.org/all/172377544331.67914.7474878424159759789.stgit@de… This version just update the comment in poll.c and add Shuah's Reviewed-by. Background ---------- There has been interest in allowing user programs to monitor kernel events in real time. Ftrace provides `trace_pipe` interface to wait on events in the ring buffer, but it is needed to wait until filling up a page with events in the ring buffer. We can also peek the `trace` file periodically, but that is inefficient way to monitor a randomely happening event. Overview -------- This patch set allows user to `poll`(or `select`, `epoll`) on event histogram interface. As you know each event has its own `hist` file which shows histograms generated by trigger action. So user can set a new hist trigger on any event you want to monitor, and poll on the `hist` file until it is updated. There are 2 poll events are supported, POLLIN and POLLPRI. POLLIN means that there are any readable update on `hist` file and this event will be flashed only when you call read(). So, this is useful if you want to read the histogram periodically. The other POLLPRI event is for monitoring trace event. Like the POLLIN, this will be returned when the histogram is updated, but you don't need to read() the file and use poll() again. Note that this waits for histogram update (not event arrival), thus you must set a histogram on the event at first. Usage ----- Here is an example usage: ---- TRACEFS=/sys/kernel/tracing EVENT=$TRACEFS/events/sched/sched_process_free # setup histogram trigger and enable event echo "hist:key=comm" >> $EVENT/trigger echo 1 > $EVENT/enable # Wait for update poll pri $EVENT/hist # Event arrived. echo "process free event is comming" tail $TRACEFS/trace ---- The 'poll' command is in the selftest patch. You can take this series also from here; https://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git/log/?h=t… Thank you, --- Masami Hiramatsu (Google) (3): tracing/hist: Add poll(POLLIN) support on hist file tracing/hist: Support POLLPRI event for poll on histogram selftests/tracing: Add hist poll() support test include/linux/trace_events.h | 5 + kernel/trace/trace_events.c | 18 ++++ kernel/trace/trace_events_hist.c | 101 +++++++++++++++++++- tools/testing/selftests/ftrace/Makefile | 2 tools/testing/selftests/ftrace/poll.c | 74 +++++++++++++++ .../ftrace/test.d/trigger/trigger-hist-poll.tc | 74 +++++++++++++++ 6 files changed, 271 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/ftrace/poll.c create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-poll.tc -- Masami Hiramatsu (Google) <mhiramat(a)kernel.org>

9 months

2
4
0 0

[PATCH AUTOSEL 6.6 01/58] selftests/bpf: Fix ARG_PTR_TO_LONG {half-,}uninitialized test

by Sasha Levin

From: Daniel Borkmann <daniel(a)iogearbox.net> [ Upstream commit b8e188f023e07a733b47d5865311ade51878fe40 ] The assumption of 'in privileged mode reads from uninitialized stack locations are permitted' is not quite correct since the verifier was probing for read access rather than write access. Both tests need to be annotated as __success for privileged and unprivileged. Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Acked-by: Andrii Nakryiko <andrii(a)kernel.org> Link: https://lore.kernel.org/r/20240913191754.13290-6-daniel@iogearbox.net Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/progs/verifier_int_ptr.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/verifier_int_ptr.c b/tools/testing/selftests/bpf/progs/verifier_int_ptr.c index 589e8270de462..d873da71f1436 100644 --- a/tools/testing/selftests/bpf/progs/verifier_int_ptr.c +++ b/tools/testing/selftests/bpf/progs/verifier_int_ptr.c @@ -8,7 +8,6 @@ SEC("socket") __description("ARG_PTR_TO_LONG uninitialized") __success -__failure_unpriv __msg_unpriv("invalid indirect read from stack R4 off -16+0 size 8") __naked void arg_ptr_to_long_uninitialized(void) { asm volatile (" \ @@ -36,9 +35,7 @@ __naked void arg_ptr_to_long_uninitialized(void) SEC("socket") __description("ARG_PTR_TO_LONG half-uninitialized") -/* in privileged mode reads from uninitialized stack locations are permitted */ -__success __failure_unpriv -__msg_unpriv("invalid indirect read from stack R4 off -16+4 size 8") +__success __retval(0) __naked void ptr_to_long_half_uninitialized(void) { -- 2.43.0

9 months

1
0
0 0

[PATCH AUTOSEL 6.10 02/70] selftests/bpf: Fix ARG_PTR_TO_LONG {half-,}uninitialized test

by Sasha Levin

From: Daniel Borkmann <daniel(a)iogearbox.net> [ Upstream commit b8e188f023e07a733b47d5865311ade51878fe40 ] The assumption of 'in privileged mode reads from uninitialized stack locations are permitted' is not quite correct since the verifier was probing for read access rather than write access. Both tests need to be annotated as __success for privileged and unprivileged. Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Acked-by: Andrii Nakryiko <andrii(a)kernel.org> Link: https://lore.kernel.org/r/20240913191754.13290-6-daniel@iogearbox.net Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/progs/verifier_int_ptr.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/verifier_int_ptr.c b/tools/testing/selftests/bpf/progs/verifier_int_ptr.c index 9fc3fae5cd833..87206803c0255 100644 --- a/tools/testing/selftests/bpf/progs/verifier_int_ptr.c +++ b/tools/testing/selftests/bpf/progs/verifier_int_ptr.c @@ -8,7 +8,6 @@ SEC("socket") __description("ARG_PTR_TO_LONG uninitialized") __success -__failure_unpriv __msg_unpriv("invalid indirect read from stack R4 off -16+0 size 8") __naked void arg_ptr_to_long_uninitialized(void) { asm volatile (" \ @@ -36,9 +35,7 @@ __naked void arg_ptr_to_long_uninitialized(void) SEC("socket") __description("ARG_PTR_TO_LONG half-uninitialized") -/* in privileged mode reads from uninitialized stack locations are permitted */ -__success __failure_unpriv -__msg_unpriv("invalid indirect read from stack R4 off -16+4 size 8") +__success __retval(0) __naked void ptr_to_long_half_uninitialized(void) { -- 2.43.0

9 months

1
0
0 0

[PATCH AUTOSEL 6.11 02/76] selftests/bpf: Fix ARG_PTR_TO_LONG {half-,}uninitialized test

by Sasha Levin

From: Daniel Borkmann <daniel(a)iogearbox.net> [ Upstream commit b8e188f023e07a733b47d5865311ade51878fe40 ] The assumption of 'in privileged mode reads from uninitialized stack locations are permitted' is not quite correct since the verifier was probing for read access rather than write access. Both tests need to be annotated as __success for privileged and unprivileged. Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Acked-by: Andrii Nakryiko <andrii(a)kernel.org> Link: https://lore.kernel.org/r/20240913191754.13290-6-daniel@iogearbox.net Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/progs/verifier_int_ptr.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/verifier_int_ptr.c b/tools/testing/selftests/bpf/progs/verifier_int_ptr.c index 9fc3fae5cd833..87206803c0255 100644 --- a/tools/testing/selftests/bpf/progs/verifier_int_ptr.c +++ b/tools/testing/selftests/bpf/progs/verifier_int_ptr.c @@ -8,7 +8,6 @@ SEC("socket") __description("ARG_PTR_TO_LONG uninitialized") __success -__failure_unpriv __msg_unpriv("invalid indirect read from stack R4 off -16+0 size 8") __naked void arg_ptr_to_long_uninitialized(void) { asm volatile (" \ @@ -36,9 +35,7 @@ __naked void arg_ptr_to_long_uninitialized(void) SEC("socket") __description("ARG_PTR_TO_LONG half-uninitialized") -/* in privileged mode reads from uninitialized stack locations are permitted */ -__success __failure_unpriv -__msg_unpriv("invalid indirect read from stack R4 off -16+4 size 8") +__success __retval(0) __naked void ptr_to_long_half_uninitialized(void) { -- 2.43.0

9 months

1
0
0 0

[PATCH 0/3] KVM: x86: Fix Intel PT Host/Guest mode when host tracing also

by Adrian Hunter

Hi There is a long-standing problem whereby running Intel PT on host and guest in Host/Guest mode, causes VM-Entry failure. The motivation for this patch set is to provide a fix for stable kernels prior to the advent of the "Mediated Passthrough vPMU" patch set: https://lore.kernel.org/kvm/20240801045907.4010984-1-mizhang@google.com/ which would render a large part of the fix unnecessary but likely not be suitable for backport to stable due to its size and complexity. Ideally, this patch set would be applied before "Mediated Passthrough vPMU" Note that the fix does not conflict with "Mediated Passthrough vPMU", it is just that "Mediated Passthrough vPMU" will make the code to stop and restart Intel PT unnecessary. Adrian Hunter (3): KVM: x86: Fix Intel PT IA32_RTIT_CTL MSR validation KVM: x86: Fix Intel PT Host/Guest mode when host tracing also KVM: selftests: Add guest Intel PT test arch/x86/events/intel/pt.c | 131 ++++++- arch/x86/events/intel/pt.h | 10 + arch/x86/include/asm/intel_pt.h | 4 + arch/x86/kvm/vmx/vmx.c | 26 +- arch/x86/kvm/vmx/vmx.h | 1 - tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/include/x86_64/processor.h | 1 + tools/testing/selftests/kvm/x86_64/intel_pt.c | 381 +++++++++++++++++++++ 8 files changed, 532 insertions(+), 23 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/intel_pt.c base-commit: d45aab436cf06544abeeffc607110f559a3af3b4 Regards Adrian

9 months

2
6
0 0

[PATCH 0/3] selftests: net: add missing gitignore and EXTRA_CLEAN entries.

by Javier Carrasco

This series is a cherry-pick on top of v6.12-rc1 from the one I sent for selftests with other patches that were not net-related: https://lore.kernel.org/all/20240925-selftests-gitignore-v3-0-9db896474170@… The patches have not been modified, and the Reviewed-by tags have been kept. Signed-off-by: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> --- Javier Carrasco (3): selftests: net: add msg_oob to gitignore selftests: net: rds: add include.sh to EXTRA_CLEAN selftests: net: rds: add gitignore file for include.sh tools/testing/selftests/net/.gitignore | 1 + tools/testing/selftests/net/rds/.gitignore | 1 + tools/testing/selftests/net/rds/Makefile | 2 +- 3 files changed, 3 insertions(+), 1 deletion(-) --- base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc change-id: 20240930-net-selftests-gitignore-18b844f29391 Best regards, -- Javier Carrasco <javier.carrasco.cruz(a)gmail.com>

9 months

2
4
0 0

[PATCH HID v3 0/9] HID: bpf: add a new hook to control hid-generic

by Benjamin Tissoires

This is a slight change from the fundamentals of HID-BPF. In theory, HID-BPF is abstract to the kernel itself, and makes only changes at the HID level (through report descriptors or events emitted to/from the device). However, we have seen a few use cases where HID-BPF might interact with the running kernel when the target device is already handled by a specific device. For example, the XP-Pen/Huion/UC-Logic tablets are handled by hid-uclogic but this driver is also doing a report descriptor fixup without checking if the device has already been fixed by HID-BPF. In the same way, another recent example[0] was when a cheap foot pedal is used and tricks iPhones and Windows machines by presenting itself as a known Apple wireless keyboard. The problem is that this fake keyboard is not presenting a compatible report descriptor and hid-core merges all device nodes together making libinput ignore the keyboard part for historical reasons. This series aims at tackling this problem: - first, we promote hid_bpf_report_descriptor_fixup to be called before any driver is even matched for the device - then we allow hdev->quirks to be written during report_fixup and add a new quirk to force hid-core to ignore any non hid-generic driver. Basically, it means that when we insert a BPF program to fix a device, we can force hid-generic to handle the device, and thus preventing any other kernel driver to tamper with our device. This branch is on top of the for-6.12/upstream-fixes branch of hid.git. [0] https://gitlab.freedesktop.org/libinput/libinput/-/issues/1014 Signed-off-by: Benjamin Tissoires <bentiss(a)kernel.org> --- Changes in v3: - dropped the last 2 patches with hid-input control, as I'm not 100% sure of it - changed the first patch to avoid a double free on cleanup of a device when a HID-BPF program was attached - kept Peter's rev-by for all but patches 1 and 6 - Link to v2: https://lore.kernel.org/r/20240910-hid-bpf-hid-generic-v2-0-083dfc189e97@ke… Changes in v2: - Refactored the API to not use a new hook but hid_bpf_rdesc_fixup instead - Some cleanups in hid-core.c probe() device to not kmemdup multiple time the report descriptor when it's not required - I'm still not 100% sure the HID_QUIRK_IGNORE_HIDINPUT is that required, but I can not think of anything else at the moment to temporary disable any driver input device. - Link to v1: https://lore.kernel.org/r/20240903-hid-bpf-hid-generic-v1-0-9511a565b2da@ke… --- Benjamin Tissoires (9): HID: bpf: move HID-BPF report descriptor fixup earlier HID: core: save one kmemdup during .probe() HID: core: remove one more kmemdup on .probe() HID: bpf: allow write access to quirks field in struct hid_device selftests/hid: add dependency on hid_common.h selftests/hid: cleanup C tests by adding a common struct uhid_device selftests/hid: allow to parametrize bus/vid/pid/rdesc on the test device HID: add per device quirk to force bind to hid-generic selftests/hid: add test for assigning a given device to hid-generic drivers/hid/bpf/hid_bpf_dispatch.c | 9 +- drivers/hid/bpf/hid_bpf_struct_ops.c | 1 + drivers/hid/hid-core.c | 84 +++++++++--- drivers/hid/hid-generic.c | 3 + include/linux/hid.h | 20 +-- include/linux/hid_bpf.h | 11 +- tools/testing/selftests/hid/Makefile | 2 +- tools/testing/selftests/hid/hid_bpf.c | 151 ++++++++++++++------- tools/testing/selftests/hid/hid_common.h | 112 ++++++++++----- tools/testing/selftests/hid/hidraw.c | 36 ++--- tools/testing/selftests/hid/progs/hid.c | 12 ++ .../testing/selftests/hid/progs/hid_bpf_helpers.h | 6 +- 12 files changed, 296 insertions(+), 151 deletions(-) --- base-commit: acd5f76fd5292c91628e04da83e8b78c986cfa2b change-id: 20240829-hid-bpf-hid-generic-61579f5b5945 Best regards, -- Benjamin Tissoires <bentiss(a)kernel.org>

9 months

2
11
0 0

[PATCH bpf-next] selftests, bpf: Skip MPLS test_tc_tunnel tests if MPLS is unavailable

by Simon Horman

If MPLS is not available in the kernel then skip MPLS tests. This avoids the test failing in situations where the test is not supported by the underlying kernel. In the case where all tests are run, just skip over the MPLS tests without altering the exit code of the overall test run - there is only one exit code in this scenario. In the case where a single test is run, exit with KSFT_SKIP (4). In both cases log an informative message. Signed-off-by: Simon Horman <horms(a)kernel.org> --- tools/testing/selftests/bpf/test_tc_tunnel.sh | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/test_tc_tunnel.sh b/tools/testing/selftests/bpf/test_tc_tunnel.sh index 7989ec608454..71cddabc4ade 100755 --- a/tools/testing/selftests/bpf/test_tc_tunnel.sh +++ b/tools/testing/selftests/bpf/test_tc_tunnel.sh @@ -102,6 +102,20 @@ wait_for_port() { return 1 } +skip_mac() { + if [ "$1" = "mpls" ]; then + modprobe mpls_iptunnel || true + modprobe mpls_gso || true + + if [ ! -e /proc/sys/net/mpls/platform_labels ]; then + echo -e "skip: mpls tunnel not supported by kernel\n" + return # true + fi + fi + + false +} + set -e # no arguments: automated test, run all @@ -125,6 +139,8 @@ if [[ "$#" -eq "0" ]]; then $0 ipv6 ip6vxlan eth 2000 for mac in none mpls eth ; do + ! skip_mac "$mac" || continue + echo "ip gre $mac" $0 ipv4 gre $mac 100 @@ -193,6 +209,10 @@ readonly tuntype=$2 readonly mac=$3 readonly datalen=$4 +if skip_mac "$mac"; then + exit 4 # KSFT_SKIP=4 +fi + echo "encap ${addr1} to ${addr2}, type ${tuntype}, mac ${mac} len ${datalen}" trap cleanup EXIT @@ -278,8 +298,6 @@ elif [[ "$tuntype" =~ (gre|vxlan) && "$mac" == "eth" ]]; then awk '/ether/ { print $2 }') ip netns exec "${ns2}" ip link set testtun0 address $ethaddr elif [[ "$mac" == "mpls" ]]; then - modprobe mpls_iptunnel ||true - modprobe mpls_gso ||true ip netns exec "${ns2}" sysctl -qw net.mpls.platform_labels=65536 ip netns exec "${ns2}" ip -f mpls route add 1000 dev lo ip netns exec "${ns2}" ip link set lo up

9 months

2
2
0 0

[PATCH bpf-next v2] selftests/bpf: convert test_xdp_features.sh to test_progs

by Alexis Lothoré (eBPF Foundation)

test_xdp_features.sh is a shell script allowing to test that xdp features advertised by an interface are indeed delivered. The test works by starting two instance of the same program, both attaching specific xdp programs to each side of a veth link, and then make those programs manage packets and collect stats to check whether tested XDP feature is indeed delivered or not. However this test is not integrated in test_progs framework and so can not run automatically in CI. Rewrite test_xdp_features to integrate it in test_progs so it can run automatically in CI. The main changes brought by the rewrite are the following: - instead of running to separated processes (each one managing either the tester veth or the DUT vet), run a single process - slightly change testing direction (v0 is the tester in local namespace, v1 is the Device Under Test in remote namespace) - group all tests previously managed by test_xdp_features as subtests (one per tested XDP feature). As a consequence, run only once some steps instead of once per subtest (eg: starting/stopping the udp server). On the contrary, make sure that each subtest properly cleans up its state (ie detach xdp programs, reset test stats, etc) - since there is now a single process, get rid of the "control" tcp channel used to configure DUT. Configuring the DUT now only consists in switching to DUT network namespace and run the relevant commands - since there is no more control channel, get rid of TLVs, keep only the CMD_ECHO packet type, and set it as a magic - simplify network setup: use only ipv6 instead of both ipv4 and ipv6, force static neighbours instead of waiting for autoconfiguration, do not force gro (fetch xdp features only once xdp programs are loaded instead) The existing XDP programs are reused, with some minor changes: - tester and dut stats maps are converted to global variables for easier usage - programs do not use TLV struct anymore but the magic replacing the echo command - avoid to accidentally make tests pass: drop packets instead of forwarding them to userspace when they do not match the expected payload - make sure to perform host <-> network endianness conversion on constants rather than packet parts Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore(a)bootlin.com> --- Changes in v2: - fix endianness management in userspace packet parsing (call htonl on constant rather than packet part) The xdp_features rewrite has been tested in a x86_64 qemu environment on my machine and in CI. In my environment, the test takes a bit less than 2s to execute. # ./test_progs -a xdp_features #561/1 xdp_features/XDP_PASS:OK #561/2 xdp_features/XDP_DROP:OK #561/3 xdp_features/XDP_ABORTED:OK #561/4 xdp_features/XDP_TX:OK #561/5 xdp_features/XDP_REDIRECT:OK #561/6 xdp_features/XDP_NDO_XMIT:OK #561 xdp_features:OK Summary: 1/6 PASSED, 0 SKIPPED, 0 FAILED --- tools/testing/selftests/bpf/.gitignore | 1 - tools/testing/selftests/bpf/Makefile | 10 +- .../selftests/bpf/prog_tests/xdp_features.c | 446 +++++++++++++ tools/testing/selftests/bpf/progs/xdp_features.c | 49 +- tools/testing/selftests/bpf/test_xdp_features.sh | 107 --- tools/testing/selftests/bpf/xdp_features.c | 718 --------------------- tools/testing/selftests/bpf/xdp_features.h | 17 +- 7 files changed, 462 insertions(+), 886 deletions(-) diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore index e6533b3400de..93bf35213042 100644 --- a/tools/testing/selftests/bpf/.gitignore +++ b/tools/testing/selftests/bpf/.gitignore @@ -48,4 +48,3 @@ xskxceiver xdp_redirect_multi xdp_synproxy xdp_hw_metadata -xdp_features diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 04716a5e43f1..db4a802c3e06 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -145,8 +145,7 @@ TEST_PROGS := test_kmod.sh \ test_bpftool.sh \ test_bpftool_metadata.sh \ test_doc_build.sh \ - test_xsk.sh \ - test_xdp_features.sh + test_xsk.sh TEST_PROGS_EXTENDED := with_addr.sh \ with_tunnels.sh ima_setup.sh verify_sig_setup.sh \ @@ -157,7 +156,7 @@ TEST_GEN_PROGS_EXTENDED = \ flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \ test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \ xskxceiver xdp_redirect_multi xdp_synproxy veristat xdp_hw_metadata \ - xdp_features bpf_test_no_cfi.ko + bpf_test_no_cfi.ko TEST_GEN_FILES += liburandom_read.so urandom_read sign-file uprobe_multi @@ -519,7 +518,6 @@ test_subskeleton_lib.skel.h-deps := test_subskeleton_lib2.bpf.o test_subskeleton test_usdt.skel.h-deps := test_usdt.bpf.o test_usdt_multispec.bpf.o xsk_xdp_progs.skel.h-deps := xsk_xdp_progs.bpf.o xdp_hw_metadata.skel.h-deps := xdp_hw_metadata.bpf.o -xdp_features.skel.h-deps := xdp_features.bpf.o LINKED_BPF_OBJS := $(foreach skel,$(LINKED_SKELS),$($(skel)-deps)) LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.c,$(LINKED_BPF_OBJS)) @@ -787,10 +785,6 @@ $(OUTPUT)/xdp_hw_metadata: xdp_hw_metadata.c $(OUTPUT)/network_helpers.o $(OUTPU $(call msg,BINARY,,$@) $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@ -$(OUTPUT)/xdp_features: xdp_features.c $(OUTPUT)/network_helpers.o $(OUTPUT)/xdp_features.skel.h | $(OUTPUT) - $(call msg,BINARY,,$@) - $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@ - # Make sure we are able to include and link libbpf against c++. $(OUTPUT)/test_cpp: test_cpp.cpp $(OUTPUT)/test_core_extern.skel.h $(BPFOBJ) $(call msg,CXX,,$@) diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_features.c b/tools/testing/selftests/bpf/prog_tests/xdp_features.c new file mode 100644 index 000000000000..bcb36a2d2767 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/xdp_features.c @@ -0,0 +1,446 @@ +// SPDX-License-Identifier: GPL-2.0 + +/** + * Test XDP features + * + * Sets up a veth pair, and for each xdp feature under test: + * - asks the tested interface its xdp capabilities through bpf_xdp_query + * - attach and run some specific programs on both interfaces to check if + * announced capability is respected + */ +#include <pthread.h> +#include <linux/if_link.h> +#include <linux/netdev.h> +#include <linux/if_link.h> +#include <sys/socket.h> +#include "test_progs.h" +#include "network_helpers.h" +#include "xdp_features.skel.h" +#include "xdp_features.h" + +#define TESTER_VETH "v0" +#define TESTER_MAC "00:11:22:33:44:55" +#define TESTER_VETH_IPV6 "2001:db8::1" +#define DUT_NS "xdp_features_ns" +#define DUT_VETH "v1" +#define DUT_MAC "aa:bb:cc:dd:ee:ff" +#define DUT_VETH_IPV6 "2001:db8::11" +#define IP6_MASK 64 +#define LOOP_DELAY_US 10000 +#define TEST_NAME_MAX_LEN 32 +#define TEST_PACKET_COUNT 10 + +struct test_data { + struct xdp_features *skel; + pthread_t dut_echo_thread; + int echo_server_sock; + int tester_ifindex; + int dut_ifindex; + struct sockaddr_storage tester_addr; + struct sockaddr_storage dut_addr; + bool quit_dut_echo_thread; +}; + +static void *run_dut_echo_thread(void *arg) +{ + struct test_data *t = (struct test_data *)arg; + __u32 magic; + + while (!t->quit_dut_echo_thread) { + struct sockaddr_storage addr; + socklen_t addrlen; + size_t n; + + n = recvfrom(t->echo_server_sock, &magic, sizeof(magic), + MSG_WAITALL, (struct sockaddr *)&addr, &addrlen); + if (n != sizeof(magic)) { + usleep(LOOP_DELAY_US); + continue; + } + + if (magic != htonl(CMD_ECHO)) + continue; + + /* Answer echo command with the very same message */ + sendto(t->echo_server_sock, &magic, sizeof(magic), + MSG_NOSIGNAL | MSG_CONFIRM, (struct sockaddr *)&addr, + addrlen); + } + pthread_exit(NULL); +} + +static int dut_start_echo_server(struct test_data *t) +{ + struct nstoken *token; + int err = 0, flags; + + token = open_netns(DUT_NS); + if (!ASSERT_OK_PTR(token, "open dut ns")) + return -EINVAL; + + t->echo_server_sock = + start_server(AF_INET6, SOCK_DGRAM, NULL, DUT_ECHO_PORT, 0); + if (!ASSERT_OK_FD(t->echo_server_sock, "start dut echo server")) { + err = t->echo_server_sock; + goto restore_ns; + } + + flags = fcntl(t->echo_server_sock, F_GETFL, 0); + err = fcntl(t->echo_server_sock, F_SETFL, flags | O_NONBLOCK); + if (!ASSERT_OK(err, "set non-blocking socket")) + goto close_server; + + err = pthread_create(&t->dut_echo_thread, NULL, run_dut_echo_thread, t); + if (!ASSERT_OK(err, "start dut echo thread")) + goto close_server; + + close_netns(token); + return 0; + +close_server: + close(t->echo_server_sock); +restore_ns: + close_netns(token); + return err; +} + +static void dut_stop_echo_server(struct test_data *t) +{ + struct nstoken *token; + + token = open_netns(DUT_NS); + if (!ASSERT_OK_PTR(token, "open dut ns")) + return; + + t->quit_dut_echo_thread = true; + pthread_join(t->dut_echo_thread, NULL); + + close(t->echo_server_sock); + close_netns(token); +} + +static int dut_attach_xdp_prog(struct test_data *t, int flags, + enum netdev_xdp_act drv_feature, + enum xdp_action action) +{ + struct bpf_program *prog; + unsigned int key = 0; + int err, fd = 0; + + if (drv_feature == NETDEV_XDP_ACT_NDO_XMIT) { + struct bpf_devmap_val entry = { .ifindex = t->dut_ifindex }; + + err = bpf_map__update_elem(t->skel->maps.dev_map, &key, + sizeof(key), &entry, sizeof(entry), + 0); + if (!ASSERT_OK(err, "update dev map")) + return err; + + fd = bpf_program__fd(t->skel->progs.xdp_do_redirect_cpumap); + action = XDP_REDIRECT; + } + + switch (action) { + case XDP_TX: + prog = t->skel->progs.xdp_do_tx; + break; + case XDP_DROP: + prog = t->skel->progs.xdp_do_drop; + break; + case XDP_ABORTED: + prog = t->skel->progs.xdp_do_aborted; + break; + case XDP_PASS: + prog = t->skel->progs.xdp_do_pass; + break; + case XDP_REDIRECT: { + struct bpf_cpumap_val entry = { + .qsize = 4096, + .bpf_prog.fd = fd, + }; + + err = bpf_map__update_elem(t->skel->maps.cpu_map, &key, + sizeof(key), &entry, sizeof(entry), + 0); + if (!ASSERT_OK(err, "update cpu map")) + return err; + + prog = t->skel->progs.xdp_do_redirect; + break; + } + default: + return -ENOTSUP; + } + + err = bpf_xdp_attach(t->dut_ifindex, bpf_program__fd(prog), flags, + NULL); + ASSERT_OK(err, "attach xdp prog to dut"); + return err; +} + +static int dut_start_test(struct test_data *t, enum netdev_xdp_act drv_feature, + enum xdp_action action) +{ + int flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE; + struct nstoken *token = open_netns(DUT_NS); + int err; + + if (!ASSERT_OK_PTR(token, "open dut ns")) + return -EINVAL; + + err = dut_attach_xdp_prog(t, flags, drv_feature, action); + ASSERT_OK(err, "attach xdp program to dut"); + close_netns(token); + + return err; +} + +static void dut_stop_test(struct test_data *t) +{ + int flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE; + struct nstoken *token = open_netns(DUT_NS); + + if (!ASSERT_OK_PTR(token, "open dut ns")) + return; + + bpf_xdp_detach(t->dut_ifindex, flags, NULL); + close_netns(token); +} + +static int dut_get_xdp_features(struct test_data *t, __u64 *xdp_features) +{ + struct nstoken *token = open_netns(DUT_NS); + int err; + + if (!ASSERT_OK_PTR(token, "open dut ns")) + return -EINVAL; + + LIBBPF_OPTS(bpf_xdp_query_opts, opts); + err = bpf_xdp_query(t->dut_ifindex, XDP_FLAGS_DRV_MODE, &opts); + close_netns(token); + + if (ASSERT_OK(err, "get dut interface xdp features")) + *xdp_features = opts.feature_flags; + + return err; +} + +static int send_echo_msg(struct test_data *t) +{ + __u32 magic = htonl(CMD_ECHO); + int sockfd, n; + + sockfd = socket(AF_INET6, SOCK_DGRAM, 0); + if (!ASSERT_OK_FD(sockfd, "open tester socket")) + return sockfd; + + n = sendto(sockfd, &magic, sizeof(magic), MSG_NOSIGNAL | MSG_CONFIRM, + (struct sockaddr *)&t->dut_addr, + sizeof(struct sockaddr_storage)); + close(sockfd); + + return n == sizeof(magic) ? 0 : -EINVAL; +} + +static bool tester_collect_detected_cap(struct test_data *t, + enum netdev_xdp_act drv_feature, + enum xdp_action action) +{ + if (!t->skel->bss->dut_stats) + return false; + + if (drv_feature == NETDEV_XDP_ACT_NDO_XMIT) + return t->skel->bss->tester_stats > 0; + + switch (action) { + case XDP_PASS: + case XDP_TX: + case XDP_REDIRECT: + return t->skel->bss->tester_stats > 0; + case XDP_DROP: + case XDP_ABORTED: + return t->skel->bss->tester_stats == 0; + default: + break; + } + + return false; +} + +static void reset_test_stats(struct test_data *t, + struct sockaddr_storage *tester_addr, + struct sockaddr_storage *dut_addr) +{ + t->skel->bss->tester_stats = 0; + t->skel->bss->dut_stats = 0; +} + +static int setup_network(struct test_data *t) +{ + struct nstoken *token; + int err; + + err = make_sockaddr(AF_INET6, DUT_VETH_IPV6, DUT_ECHO_PORT, + &t->dut_addr, NULL); + if (!ASSERT_OK(err, "dut data addr")) + return -1; + + err = make_sockaddr(AF_INET6, TESTER_VETH_IPV6, 0, &t->tester_addr, + NULL); + if (!ASSERT_OK(err, "tester addr")) + return -1; + + /* Create interfaces and testing namespace */ + SYS(fail, "ip netns add %s", DUT_NS); + SYS(cleanup_ns, + "ip link add %s address %s type veth peer name %s netns %s address %s", + TESTER_VETH, TESTER_MAC, DUT_VETH, DUT_NS, DUT_MAC); + + /* Configure tester side in local namespace */ + SYS(cleanup_interfaces, "ip a add %s/%d nodad dev %s", TESTER_VETH_IPV6, + IP6_MASK, TESTER_VETH); + SYS(cleanup_interfaces, "ip link set %s up", TESTER_VETH); + SYS(cleanup_interfaces, + "ethtool -K %s tx-checksumming off > /dev/null 2>&1", TESTER_VETH); + SYS(cleanup_interfaces, "ip neigh add %s dev %s lladdr %s", + DUT_VETH_IPV6, TESTER_VETH, DUT_MAC); + t->tester_ifindex = if_nametoindex(TESTER_VETH); + if (!ASSERT_NEQ(t->tester_ifindex, 0, + "get tester veth interface index")) + goto cleanup_interfaces; + + /* Configure dut side in remote namespace */ + token = open_netns(DUT_NS); + if (!ASSERT_OK_PTR(token, "switch to dut ns")) + goto cleanup_interfaces; + SYS(restore_ns, "ip link set %s up", DUT_VETH); + SYS(restore_ns, "ip a add %s/%d nodad dev %s", DUT_VETH_IPV6, IP6_MASK, + DUT_VETH); + SYS(restore_ns, "ethtool -K %s tx-checksumming off > /dev/null 2>&1", + DUT_VETH); + SYS(restore_ns, "ip neigh add %s dev %s lladdr %s", TESTER_VETH_IPV6, + DUT_VETH, TESTER_MAC); + t->dut_ifindex = if_nametoindex(DUT_VETH); + if (!ASSERT_NEQ(t->dut_ifindex, 0, "get dut veth interface index")) + goto restore_ns; + close_netns(token); + + return 0; + +restore_ns: + close_netns(token); +cleanup_interfaces: + SYS_NOFAIL("ip link del %s", TESTER_VETH); +cleanup_ns: + SYS_NOFAIL("ip netns del %s", DUT_NS); +fail: + return 1; +} + +static void cleanup_network(void) +{ + SYS_NOFAIL("ip netns del %s", DUT_NS); + SYS_NOFAIL("ip link del %s", TESTER_VETH); +} + +static int tester_run(char *name, struct test_data *t, + enum netdev_xdp_act drv_feature, enum xdp_action action) +{ + int flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE; + unsigned long long advertised_feature; + + char test_name[TEST_NAME_MAX_LEN]; + struct bpf_program *prog; + int i, err = -EINVAL; + bool detected_cap; + + if (drv_feature == NETDEV_XDP_ACT_NDO_XMIT || action == XDP_TX) + prog = t->skel->progs.xdp_tester_check_tx; + else + prog = t->skel->progs.xdp_tester_check_rx; + + err = bpf_xdp_attach(t->tester_ifindex, bpf_program__fd(prog), flags, + NULL); + if (!ASSERT_OK(err, "attach xdp program to tester")) + goto out; + + err = dut_start_test(t, drv_feature, action); + if (!ASSERT_OK(err, "send CMD_START to DUT")) + goto out; + + err = dut_get_xdp_features(t, &advertised_feature); + if (!ASSERT_OK(err, "get tester XDP capabilities")) + goto out; + + for (i = 0; i < TEST_PACKET_COUNT; i++) { + err = send_echo_msg(t); + if (!ASSERT_OK(err, "send echo message")) + goto out; + + usleep(LOOP_DELAY_US); + } + dut_stop_test(t); + + detected_cap = tester_collect_detected_cap(t, drv_feature, action); + + snprintf(test_name, TEST_NAME_MAX_LEN, "%s advertised capabilities", + name); + ASSERT_EQ(advertised_feature & drv_feature, drv_feature, test_name); + snprintf(test_name, TEST_NAME_MAX_LEN, "%s detected capabilities", + name); + ASSERT_TRUE(detected_cap, test_name); +out: + reset_test_stats(t, &t->tester_addr, &t->dut_addr); + bpf_xdp_detach(t->tester_ifindex, flags, NULL); + return err < 0 ? err : 0; +} + +void serial_test_xdp_features(void) +{ + struct test_data t = { 0 }; + + if (!ASSERT_OK(setup_network(&t), "setup network")) + return; + + t.skel = xdp_features__open(); + if (!ASSERT_OK_PTR(t.skel, "open skel")) + goto cleanup_network; + t.skel->rodata->tester_addr = + ((struct sockaddr_in6 *)&t.tester_addr)->sin6_addr; + t.skel->rodata->dut_addr = + ((struct sockaddr_in6 *)&t.dut_addr)->sin6_addr; + if (!ASSERT_OK(xdp_features__load(t.skel), "load progs")) + goto cleanup_progs; + if (!ASSERT_OK(xdp_features__attach(t.skel), "attach progs")) + goto cleanup_progs; + + if (!ASSERT_OK(dut_start_echo_server(&t), "start DUT main thread")) + goto cleanup_progs; + + if (test__start_subtest("XDP_PASS")) + tester_run("XDP_PASS", &t, NETDEV_XDP_ACT_BASIC, XDP_PASS); + + if (test__start_subtest("XDP_DROP")) + tester_run("XDP_DROP", &t, NETDEV_XDP_ACT_BASIC, XDP_DROP); + + if (test__start_subtest("XDP_ABORTED")) + tester_run("XDP_ABORTED", &t, NETDEV_XDP_ACT_BASIC, + XDP_ABORTED); + + if (test__start_subtest("XDP_TX")) + tester_run("XDP_TX", &t, NETDEV_XDP_ACT_BASIC, XDP_TX); + + if (test__start_subtest("XDP_REDIRECT")) + tester_run("XDP_REDIRECT", &t, NETDEV_XDP_ACT_REDIRECT, + XDP_REDIRECT); + + if (test__start_subtest("XDP_NDO_XMIT")) + tester_run("XDP_NDO_XMIT", &t, NETDEV_XDP_ACT_NDO_XMIT, 0); + + dut_stop_echo_server(&t); + +cleanup_progs: + xdp_features__destroy(t.skel); +cleanup_network: + cleanup_network(); +} diff --git a/tools/testing/selftests/bpf/progs/xdp_features.c b/tools/testing/selftests/bpf/progs/xdp_features.c index 67424084a38a..acfadd711921 100644 --- a/tools/testing/selftests/bpf/progs/xdp_features.c +++ b/tools/testing/selftests/bpf/progs/xdp_features.c @@ -30,19 +30,9 @@ struct xdp_cpumap_stats { unsigned int drop; }; -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __type(key, __u32); - __type(value, __u32); - __uint(max_entries, 1); -} stats SEC(".maps"); +__u32 tester_stats; +__u32 dut_stats; -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __type(key, __u32); - __type(value, __u32); - __uint(max_entries, 1); -} dut_stats SEC(".maps"); struct { __uint(type, BPF_MAP_TYPE_CPUMAP); @@ -67,7 +57,7 @@ xdp_process_echo_packet(struct xdp_md *xdp, bool dut) void *data_end = (void *)(long)xdp->data_end; void *data = (void *)(long)xdp->data; struct ethhdr *eh = data; - struct tlv_hdr *tlv; + __u32 *magic; struct udphdr *uh; __be16 port; @@ -124,28 +114,23 @@ xdp_process_echo_packet(struct xdp_md *xdp, bool dut) if (port != bpf_htons(DUT_ECHO_PORT)) return -EINVAL; - tlv = (struct tlv_hdr *)(uh + 1); - if (tlv + 1 > data_end) + magic = (__u32 *)(uh + 1); + if (magic + 1 > data_end) return -EINVAL; - return bpf_htons(tlv->type) == CMD_ECHO ? 0 : -EINVAL; + return *magic == bpf_htonl(CMD_ECHO) ? 0 : -EINVAL; } static __always_inline int xdp_update_stats(struct xdp_md *xdp, bool tx, bool dut) { - __u32 *val, key = 0; - if (xdp_process_echo_packet(xdp, tx)) return -EINVAL; if (dut) - val = bpf_map_lookup_elem(&dut_stats, &key); + __sync_add_and_fetch(&dut_stats, 1); else - val = bpf_map_lookup_elem(&stats, &key); - - if (val) - __sync_add_and_fetch(val, 1); + __sync_add_and_fetch(&tester_stats, 1); return 0; } @@ -204,7 +189,7 @@ int xdp_do_tx(struct xdp_md *xdp) __u8 tmp_mac[ETH_ALEN]; if (xdp_update_stats(xdp, true, true)) - return XDP_PASS; + return XDP_DROP; __builtin_memcpy(tmp_mac, eh->h_source, ETH_ALEN); __builtin_memcpy(eh->h_source, eh->h_dest, ETH_ALEN); @@ -217,7 +202,7 @@ SEC("xdp") int xdp_do_redirect(struct xdp_md *xdp) { if (xdp_process_echo_packet(xdp, true)) - return XDP_PASS; + return XDP_DROP; return bpf_redirect_map(&cpu_map, 0, 0); } @@ -226,11 +211,7 @@ SEC("tp_btf/xdp_exception") int BPF_PROG(xdp_exception, const struct net_device *dev, const struct bpf_prog *xdp, __u32 act) { - __u32 *val, key = 0; - - val = bpf_map_lookup_elem(&dut_stats, &key); - if (val) - __sync_add_and_fetch(val, 1); + __sync_add_and_fetch(&dut_stats, 1); return 0; } @@ -239,11 +220,7 @@ SEC("tp_btf/xdp_cpumap_kthread") int BPF_PROG(tp_xdp_cpumap_kthread, int map_id, unsigned int processed, unsigned int drops, int sched, struct xdp_cpumap_stats *xdp_stats) { - __u32 *val, key = 0; - - val = bpf_map_lookup_elem(&dut_stats, &key); - if (val) - __sync_add_and_fetch(val, 1); + __sync_add_and_fetch(&dut_stats, 1); return 0; } @@ -256,7 +233,7 @@ int xdp_do_redirect_cpumap(struct xdp_md *xdp) __u8 tmp_mac[ETH_ALEN]; if (xdp_process_echo_packet(xdp, true)) - return XDP_PASS; + return XDP_DROP; __builtin_memcpy(tmp_mac, eh->h_source, ETH_ALEN); __builtin_memcpy(eh->h_source, eh->h_dest, ETH_ALEN); diff --git a/tools/testing/selftests/bpf/test_xdp_features.sh b/tools/testing/selftests/bpf/test_xdp_features.sh deleted file mode 100755 index 0aa71c4455c0..000000000000 --- a/tools/testing/selftests/bpf/test_xdp_features.sh +++ /dev/null @@ -1,107 +0,0 @@ -#!/bin/bash -# SPDX-License-Identifier: GPL-2.0 - -readonly NS="ns1-$(mktemp -u XXXXXX)" -readonly V0_IP4=10.10.0.11 -readonly V1_IP4=10.10.0.1 -readonly V0_IP6=2001:db8::11 -readonly V1_IP6=2001:db8::1 - -ret=1 - -setup() { - { - ip netns add ${NS} - - ip link add v1 type veth peer name v0 netns ${NS} - - ip link set v1 up - ip addr add $V1_IP4/24 dev v1 - ip addr add $V1_IP6/64 nodad dev v1 - ip -n ${NS} link set dev v0 up - ip -n ${NS} addr add $V0_IP4/24 dev v0 - ip -n ${NS} addr add $V0_IP6/64 nodad dev v0 - - # Enable XDP mode and disable checksum offload - ethtool -K v1 gro on - ethtool -K v1 tx-checksumming off - ip netns exec ${NS} ethtool -K v0 gro on - ip netns exec ${NS} ethtool -K v0 tx-checksumming off - } > /dev/null 2>&1 -} - -cleanup() { - ip link del v1 2> /dev/null - ip netns del ${NS} 2> /dev/null - [ "$(pidof xdp_features)" = "" ] || kill $(pidof xdp_features) 2> /dev/null -} - -wait_for_dut_server() { - while sleep 1; do - ss -tlp | grep -q xdp_features - [ $? -eq 0 ] && break - done -} - -test_xdp_features() { - setup - - ## XDP_PASS - ./xdp_features -f XDP_PASS -D $V1_IP6 -T $V0_IP6 v1 & - wait_for_dut_server - ip netns exec ${NS} ./xdp_features -t -f XDP_PASS \ - -D $V1_IP6 -C $V1_IP6 \ - -T $V0_IP6 v0 - [ $? -ne 0 ] && exit - - ## XDP_DROP - ./xdp_features -f XDP_DROP -D ::ffff:$V1_IP4 -T ::ffff:$V0_IP4 v1 & - wait_for_dut_server - ip netns exec ${NS} ./xdp_features -t -f XDP_DROP \ - -D ::ffff:$V1_IP4 \ - -C ::ffff:$V1_IP4 \ - -T ::ffff:$V0_IP4 v0 - [ $? -ne 0 ] && exit - - ## XDP_ABORTED - ./xdp_features -f XDP_ABORTED -D $V1_IP6 -T $V0_IP6 v1 & - wait_for_dut_server - ip netns exec ${NS} ./xdp_features -t -f XDP_ABORTED \ - -D $V1_IP6 -C $V1_IP6 \ - -T $V0_IP6 v0 - [ $? -ne 0 ] && exit - - ## XDP_TX - ./xdp_features -f XDP_TX -D ::ffff:$V1_IP4 -T ::ffff:$V0_IP4 v1 & - wait_for_dut_server - ip netns exec ${NS} ./xdp_features -t -f XDP_TX \ - -D ::ffff:$V1_IP4 \ - -C ::ffff:$V1_IP4 \ - -T ::ffff:$V0_IP4 v0 - [ $? -ne 0 ] && exit - - ## XDP_REDIRECT - ./xdp_features -f XDP_REDIRECT -D $V1_IP6 -T $V0_IP6 v1 & - wait_for_dut_server - ip netns exec ${NS} ./xdp_features -t -f XDP_REDIRECT \ - -D $V1_IP6 -C $V1_IP6 \ - -T $V0_IP6 v0 - [ $? -ne 0 ] && exit - - ## XDP_NDO_XMIT - ./xdp_features -f XDP_NDO_XMIT -D ::ffff:$V1_IP4 -T ::ffff:$V0_IP4 v1 & - wait_for_dut_server - ip netns exec ${NS} ./xdp_features -t -f XDP_NDO_XMIT \ - -D ::ffff:$V1_IP4 \ - -C ::ffff:$V1_IP4 \ - -T ::ffff:$V0_IP4 v0 - ret=$? - cleanup -} - -set -e -trap cleanup 2 3 6 9 - -test_xdp_features - -exit $ret diff --git a/tools/testing/selftests/bpf/xdp_features.c b/tools/testing/selftests/bpf/xdp_features.c deleted file mode 100644 index 595c79141cf3..000000000000 --- a/tools/testing/selftests/bpf/xdp_features.c +++ /dev/null @@ -1,718 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <uapi/linux/bpf.h> -#include <uapi/linux/netdev.h> -#include <linux/if_link.h> -#include <signal.h> -#include <argp.h> -#include <net/if.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <netinet/tcp.h> -#include <unistd.h> -#include <arpa/inet.h> -#include <bpf/bpf.h> -#include <bpf/libbpf.h> -#include <pthread.h> - -#include <network_helpers.h> - -#include "xdp_features.skel.h" -#include "xdp_features.h" - -#define RED(str) "\033[0;31m" str "\033[0m" -#define GREEN(str) "\033[0;32m" str "\033[0m" -#define YELLOW(str) "\033[0;33m" str "\033[0m" - -static struct env { - bool verbosity; - char ifname[IF_NAMESIZE]; - int ifindex; - bool is_tester; - struct { - enum netdev_xdp_act drv_feature; - enum xdp_action action; - } feature; - struct sockaddr_storage dut_ctrl_addr; - struct sockaddr_storage dut_addr; - struct sockaddr_storage tester_addr; -} env; - -#define BUFSIZE 128 - -void test__fail(void) { /* for network_helpers.c */ } - -static int libbpf_print_fn(enum libbpf_print_level level, - const char *format, va_list args) -{ - if (level == LIBBPF_DEBUG && !env.verbosity) - return 0; - return vfprintf(stderr, format, args); -} - -static volatile bool exiting; - -static void sig_handler(int sig) -{ - exiting = true; -} - -const char *argp_program_version = "xdp-features 0.0"; -const char argp_program_doc[] = -"XDP features detection application.\n" -"\n" -"XDP features application checks the XDP advertised features match detected ones.\n" -"\n" -"USAGE: ./xdp-features [-vt] [-f <xdp-feature>] [-D <dut-data-ip>] [-T <tester-data-ip>] [-C <dut-ctrl-ip>] <iface-name>\n" -"\n" -"dut-data-ip, tester-data-ip, dut-ctrl-ip: IPv6 or IPv4-mapped-IPv6 addresses;\n" -"\n" -"XDP features\n:" -"- XDP_PASS\n" -"- XDP_DROP\n" -"- XDP_ABORTED\n" -"- XDP_REDIRECT\n" -"- XDP_NDO_XMIT\n" -"- XDP_TX\n"; - -static const struct argp_option opts[] = { - { "verbose", 'v', NULL, 0, "Verbose debug output" }, - { "tester", 't', NULL, 0, "Tester mode" }, - { "feature", 'f', "XDP-FEATURE", 0, "XDP feature to test" }, - { "dut_data_ip", 'D', "DUT-DATA-IP", 0, "DUT IP data channel" }, - { "dut_ctrl_ip", 'C', "DUT-CTRL-IP", 0, "DUT IP control channel" }, - { "tester_data_ip", 'T', "TESTER-DATA-IP", 0, "Tester IP data channel" }, - {}, -}; - -static int get_xdp_feature(const char *arg) -{ - if (!strcmp(arg, "XDP_PASS")) { - env.feature.action = XDP_PASS; - env.feature.drv_feature = NETDEV_XDP_ACT_BASIC; - } else if (!strcmp(arg, "XDP_DROP")) { - env.feature.drv_feature = NETDEV_XDP_ACT_BASIC; - env.feature.action = XDP_DROP; - } else if (!strcmp(arg, "XDP_ABORTED")) { - env.feature.drv_feature = NETDEV_XDP_ACT_BASIC; - env.feature.action = XDP_ABORTED; - } else if (!strcmp(arg, "XDP_TX")) { - env.feature.drv_feature = NETDEV_XDP_ACT_BASIC; - env.feature.action = XDP_TX; - } else if (!strcmp(arg, "XDP_REDIRECT")) { - env.feature.drv_feature = NETDEV_XDP_ACT_REDIRECT; - env.feature.action = XDP_REDIRECT; - } else if (!strcmp(arg, "XDP_NDO_XMIT")) { - env.feature.drv_feature = NETDEV_XDP_ACT_NDO_XMIT; - } else { - return -EINVAL; - } - - return 0; -} - -static char *get_xdp_feature_str(void) -{ - switch (env.feature.action) { - case XDP_PASS: - return YELLOW("XDP_PASS"); - case XDP_DROP: - return YELLOW("XDP_DROP"); - case XDP_ABORTED: - return YELLOW("XDP_ABORTED"); - case XDP_TX: - return YELLOW("XDP_TX"); - case XDP_REDIRECT: - return YELLOW("XDP_REDIRECT"); - default: - break; - } - - if (env.feature.drv_feature == NETDEV_XDP_ACT_NDO_XMIT) - return YELLOW("XDP_NDO_XMIT"); - - return ""; -} - -static error_t parse_arg(int key, char *arg, struct argp_state *state) -{ - switch (key) { - case 'v': - env.verbosity = true; - break; - case 't': - env.is_tester = true; - break; - case 'f': - if (get_xdp_feature(arg) < 0) { - fprintf(stderr, "Invalid xdp feature: %s\n", arg); - argp_usage(state); - return ARGP_ERR_UNKNOWN; - } - break; - case 'D': - if (make_sockaddr(AF_INET6, arg, DUT_ECHO_PORT, - &env.dut_addr, NULL)) { - fprintf(stderr, - "Invalid address assigned to the Device Under Test: %s\n", - arg); - return ARGP_ERR_UNKNOWN; - } - break; - case 'C': - if (make_sockaddr(AF_INET6, arg, DUT_CTRL_PORT, - &env.dut_ctrl_addr, NULL)) { - fprintf(stderr, - "Invalid address assigned to the Device Under Test: %s\n", - arg); - return ARGP_ERR_UNKNOWN; - } - break; - case 'T': - if (make_sockaddr(AF_INET6, arg, 0, &env.tester_addr, NULL)) { - fprintf(stderr, - "Invalid address assigned to the Tester device: %s\n", - arg); - return ARGP_ERR_UNKNOWN; - } - break; - case ARGP_KEY_ARG: - errno = 0; - if (strlen(arg) >= IF_NAMESIZE) { - fprintf(stderr, "Invalid device name: %s\n", arg); - argp_usage(state); - return ARGP_ERR_UNKNOWN; - } - - env.ifindex = if_nametoindex(arg); - if (!env.ifindex) - env.ifindex = strtoul(arg, NULL, 0); - if (!env.ifindex || !if_indextoname(env.ifindex, env.ifname)) { - fprintf(stderr, - "Bad interface index or name (%d): %s\n", - errno, strerror(errno)); - argp_usage(state); - return ARGP_ERR_UNKNOWN; - } - break; - default: - return ARGP_ERR_UNKNOWN; - } - - return 0; -} - -static const struct argp argp = { - .options = opts, - .parser = parse_arg, - .doc = argp_program_doc, -}; - -static void set_env_default(void) -{ - env.feature.drv_feature = NETDEV_XDP_ACT_NDO_XMIT; - env.feature.action = -EINVAL; - env.ifindex = -ENODEV; - strcpy(env.ifname, "unknown"); - make_sockaddr(AF_INET6, "::ffff:127.0.0.1", DUT_CTRL_PORT, - &env.dut_ctrl_addr, NULL); - make_sockaddr(AF_INET6, "::ffff:127.0.0.1", DUT_ECHO_PORT, - &env.dut_addr, NULL); - make_sockaddr(AF_INET6, "::ffff:127.0.0.1", 0, &env.tester_addr, NULL); -} - -static void *dut_echo_thread(void *arg) -{ - unsigned char buf[sizeof(struct tlv_hdr)]; - int sockfd = *(int *)arg; - - while (!exiting) { - struct tlv_hdr *tlv = (struct tlv_hdr *)buf; - struct sockaddr_storage addr; - socklen_t addrlen; - size_t n; - - n = recvfrom(sockfd, buf, sizeof(buf), MSG_WAITALL, - (struct sockaddr *)&addr, &addrlen); - if (n != ntohs(tlv->len)) - continue; - - if (ntohs(tlv->type) != CMD_ECHO) - continue; - - sendto(sockfd, buf, sizeof(buf), MSG_NOSIGNAL | MSG_CONFIRM, - (struct sockaddr *)&addr, addrlen); - } - - pthread_exit((void *)0); - close(sockfd); - - return NULL; -} - -static int dut_run_echo_thread(pthread_t *t, int *sockfd) -{ - int err; - - sockfd = start_reuseport_server(AF_INET6, SOCK_DGRAM, NULL, - DUT_ECHO_PORT, 0, 1); - if (!sockfd) { - fprintf(stderr, - "Failed creating data UDP socket on device %s\n", - env.ifname); - return -errno; - } - - /* start echo channel */ - err = pthread_create(t, NULL, dut_echo_thread, sockfd); - if (err) { - fprintf(stderr, - "Failed creating data UDP thread on device %s: %s\n", - env.ifname, strerror(-err)); - free_fds(sockfd, 1); - return -EINVAL; - } - - return 0; -} - -static int dut_attach_xdp_prog(struct xdp_features *skel, int flags) -{ - enum xdp_action action = env.feature.action; - struct bpf_program *prog; - unsigned int key = 0; - int err, fd = 0; - - if (env.feature.drv_feature == NETDEV_XDP_ACT_NDO_XMIT) { - struct bpf_devmap_val entry = { - .ifindex = env.ifindex, - }; - - err = bpf_map__update_elem(skel->maps.dev_map, - &key, sizeof(key), - &entry, sizeof(entry), 0); - if (err < 0) - return err; - - fd = bpf_program__fd(skel->progs.xdp_do_redirect_cpumap); - action = XDP_REDIRECT; - } - - switch (action) { - case XDP_TX: - prog = skel->progs.xdp_do_tx; - break; - case XDP_DROP: - prog = skel->progs.xdp_do_drop; - break; - case XDP_ABORTED: - prog = skel->progs.xdp_do_aborted; - break; - case XDP_PASS: - prog = skel->progs.xdp_do_pass; - break; - case XDP_REDIRECT: { - struct bpf_cpumap_val entry = { - .qsize = 2048, - .bpf_prog.fd = fd, - }; - - err = bpf_map__update_elem(skel->maps.cpu_map, - &key, sizeof(key), - &entry, sizeof(entry), 0); - if (err < 0) - return err; - - prog = skel->progs.xdp_do_redirect; - break; - } - default: - return -EINVAL; - } - - err = bpf_xdp_attach(env.ifindex, bpf_program__fd(prog), flags, NULL); - if (err) - fprintf(stderr, "Failed attaching XDP program to device %s\n", - env.ifname); - return err; -} - -static int recv_msg(int sockfd, void *buf, size_t bufsize, void *val, - size_t val_size) -{ - struct tlv_hdr *tlv = (struct tlv_hdr *)buf; - size_t len; - - len = recv(sockfd, buf, bufsize, 0); - if (len != ntohs(tlv->len) || len < sizeof(*tlv)) - return -EINVAL; - - if (val) { - len -= sizeof(*tlv); - if (len > val_size) - return -ENOMEM; - - memcpy(val, tlv->data, len); - } - - return 0; -} - -static int dut_run(struct xdp_features *skel) -{ - int flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE; - int state, err = 0, *sockfd, ctrl_sockfd, echo_sockfd; - struct sockaddr_storage ctrl_addr; - pthread_t dut_thread = 0; - socklen_t addrlen; - - sockfd = start_reuseport_server(AF_INET6, SOCK_STREAM, NULL, - DUT_CTRL_PORT, 0, 1); - if (!sockfd) { - fprintf(stderr, - "Failed creating control socket on device %s\n", env.ifname); - return -errno; - } - - ctrl_sockfd = accept(*sockfd, (struct sockaddr *)&ctrl_addr, &addrlen); - if (ctrl_sockfd < 0) { - fprintf(stderr, - "Failed accepting connections on device %s control socket\n", - env.ifname); - free_fds(sockfd, 1); - return -errno; - } - - /* CTRL loop */ - while (!exiting) { - unsigned char buf[BUFSIZE] = {}; - struct tlv_hdr *tlv = (struct tlv_hdr *)buf; - - err = recv_msg(ctrl_sockfd, buf, BUFSIZE, NULL, 0); - if (err) - continue; - - switch (ntohs(tlv->type)) { - case CMD_START: { - if (state == CMD_START) - continue; - - state = CMD_START; - /* Load the XDP program on the DUT */ - err = dut_attach_xdp_prog(skel, flags); - if (err) - goto out; - - err = dut_run_echo_thread(&dut_thread, &echo_sockfd); - if (err < 0) - goto out; - - tlv->type = htons(CMD_ACK); - tlv->len = htons(sizeof(*tlv)); - err = send(ctrl_sockfd, buf, sizeof(*tlv), 0); - if (err < 0) - goto end_thread; - break; - } - case CMD_STOP: - if (state != CMD_START) - break; - - state = CMD_STOP; - - exiting = true; - bpf_xdp_detach(env.ifindex, flags, NULL); - - tlv->type = htons(CMD_ACK); - tlv->len = htons(sizeof(*tlv)); - err = send(ctrl_sockfd, buf, sizeof(*tlv), 0); - goto end_thread; - case CMD_GET_XDP_CAP: { - LIBBPF_OPTS(bpf_xdp_query_opts, opts); - unsigned long long val; - size_t n; - - err = bpf_xdp_query(env.ifindex, XDP_FLAGS_DRV_MODE, - &opts); - if (err) { - fprintf(stderr, - "Failed querying XDP cap for device %s\n", - env.ifname); - goto end_thread; - } - - tlv->type = htons(CMD_ACK); - n = sizeof(*tlv) + sizeof(opts.feature_flags); - tlv->len = htons(n); - - val = htobe64(opts.feature_flags); - memcpy(tlv->data, &val, sizeof(val)); - - err = send(ctrl_sockfd, buf, n, 0); - if (err < 0) - goto end_thread; - break; - } - case CMD_GET_STATS: { - unsigned int key = 0, val; - size_t n; - - err = bpf_map__lookup_elem(skel->maps.dut_stats, - &key, sizeof(key), - &val, sizeof(val), 0); - if (err) { - fprintf(stderr, - "bpf_map_lookup_elem failed (%d)\n", err); - goto end_thread; - } - - tlv->type = htons(CMD_ACK); - n = sizeof(*tlv) + sizeof(val); - tlv->len = htons(n); - - val = htonl(val); - memcpy(tlv->data, &val, sizeof(val)); - - err = send(ctrl_sockfd, buf, n, 0); - if (err < 0) - goto end_thread; - break; - } - default: - break; - } - } - -end_thread: - pthread_join(dut_thread, NULL); -out: - bpf_xdp_detach(env.ifindex, flags, NULL); - close(ctrl_sockfd); - free_fds(sockfd, 1); - - return err; -} - -static bool tester_collect_detected_cap(struct xdp_features *skel, - unsigned int dut_stats) -{ - unsigned int err, key = 0, val; - - if (!dut_stats) - return false; - - err = bpf_map__lookup_elem(skel->maps.stats, &key, sizeof(key), - &val, sizeof(val), 0); - if (err) { - fprintf(stderr, "bpf_map_lookup_elem failed (%d)\n", err); - return false; - } - - switch (env.feature.action) { - case XDP_PASS: - case XDP_TX: - case XDP_REDIRECT: - return val > 0; - case XDP_DROP: - case XDP_ABORTED: - return val == 0; - default: - break; - } - - if (env.feature.drv_feature == NETDEV_XDP_ACT_NDO_XMIT) - return val > 0; - - return false; -} - -static int send_and_recv_msg(int sockfd, enum test_commands cmd, void *val, - size_t val_size) -{ - unsigned char buf[BUFSIZE] = {}; - struct tlv_hdr *tlv = (struct tlv_hdr *)buf; - int err; - - tlv->type = htons(cmd); - tlv->len = htons(sizeof(*tlv)); - - err = send(sockfd, buf, sizeof(*tlv), 0); - if (err < 0) - return err; - - err = recv_msg(sockfd, buf, BUFSIZE, val, val_size); - if (err < 0) - return err; - - return ntohs(tlv->type) == CMD_ACK ? 0 : -EINVAL; -} - -static int send_echo_msg(void) -{ - unsigned char buf[sizeof(struct tlv_hdr)]; - struct tlv_hdr *tlv = (struct tlv_hdr *)buf; - int sockfd, n; - - sockfd = socket(AF_INET6, SOCK_DGRAM, 0); - if (sockfd < 0) { - fprintf(stderr, - "Failed creating data UDP socket on device %s\n", - env.ifname); - return -errno; - } - - tlv->type = htons(CMD_ECHO); - tlv->len = htons(sizeof(*tlv)); - - n = sendto(sockfd, buf, sizeof(*tlv), MSG_NOSIGNAL | MSG_CONFIRM, - (struct sockaddr *)&env.dut_addr, sizeof(env.dut_addr)); - close(sockfd); - - return n == ntohs(tlv->len) ? 0 : -EINVAL; -} - -static int tester_run(struct xdp_features *skel) -{ - int flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE; - unsigned long long advertised_feature; - struct bpf_program *prog; - unsigned int stats; - int i, err, sockfd; - bool detected_cap; - - sockfd = socket(AF_INET6, SOCK_STREAM, 0); - if (sockfd < 0) { - fprintf(stderr, - "Failed creating tester service control socket\n"); - return -errno; - } - - if (settimeo(sockfd, 1000) < 0) - return -EINVAL; - - err = connect(sockfd, (struct sockaddr *)&env.dut_ctrl_addr, - sizeof(env.dut_ctrl_addr)); - if (err) { - fprintf(stderr, - "Failed connecting to the Device Under Test control socket\n"); - return -errno; - } - - err = send_and_recv_msg(sockfd, CMD_GET_XDP_CAP, &advertised_feature, - sizeof(advertised_feature)); - if (err < 0) { - close(sockfd); - return err; - } - - advertised_feature = be64toh(advertised_feature); - - if (env.feature.drv_feature == NETDEV_XDP_ACT_NDO_XMIT || - env.feature.action == XDP_TX) - prog = skel->progs.xdp_tester_check_tx; - else - prog = skel->progs.xdp_tester_check_rx; - - err = bpf_xdp_attach(env.ifindex, bpf_program__fd(prog), flags, NULL); - if (err) { - fprintf(stderr, "Failed attaching XDP program to device %s\n", - env.ifname); - goto out; - } - - err = send_and_recv_msg(sockfd, CMD_START, NULL, 0); - if (err) - goto out; - - for (i = 0; i < 10 && !exiting; i++) { - err = send_echo_msg(); - if (err < 0) - goto out; - - sleep(1); - } - - err = send_and_recv_msg(sockfd, CMD_GET_STATS, &stats, sizeof(stats)); - if (err) - goto out; - - /* stop the test */ - err = send_and_recv_msg(sockfd, CMD_STOP, NULL, 0); - /* send a new echo message to wake echo thread of the dut */ - send_echo_msg(); - - detected_cap = tester_collect_detected_cap(skel, ntohl(stats)); - - fprintf(stdout, "Feature %s: [%s][%s]\n", get_xdp_feature_str(), - detected_cap ? GREEN("DETECTED") : RED("NOT DETECTED"), - env.feature.drv_feature & advertised_feature ? GREEN("ADVERTISED") - : RED("NOT ADVERTISED")); -out: - bpf_xdp_detach(env.ifindex, flags, NULL); - close(sockfd); - return err < 0 ? err : 0; -} - -int main(int argc, char **argv) -{ - struct xdp_features *skel; - int err; - - libbpf_set_strict_mode(LIBBPF_STRICT_ALL); - libbpf_set_print(libbpf_print_fn); - - signal(SIGINT, sig_handler); - signal(SIGTERM, sig_handler); - - set_env_default(); - - /* Parse command line arguments */ - err = argp_parse(&argp, argc, argv, 0, NULL, NULL); - if (err) - return err; - - if (env.ifindex < 0) { - fprintf(stderr, "Invalid device name %s\n", env.ifname); - return -ENODEV; - } - - /* Load and verify BPF application */ - skel = xdp_features__open(); - if (!skel) { - fprintf(stderr, "Failed to open and load BPF skeleton\n"); - return -EINVAL; - } - - skel->rodata->tester_addr = - ((struct sockaddr_in6 *)&env.tester_addr)->sin6_addr; - skel->rodata->dut_addr = - ((struct sockaddr_in6 *)&env.dut_addr)->sin6_addr; - - /* Load & verify BPF programs */ - err = xdp_features__load(skel); - if (err) { - fprintf(stderr, "Failed to load and verify BPF skeleton\n"); - goto cleanup; - } - - err = xdp_features__attach(skel); - if (err) { - fprintf(stderr, "Failed to attach BPF skeleton\n"); - goto cleanup; - } - - if (env.is_tester) { - /* Tester */ - fprintf(stdout, "Starting tester service on device %s\n", - env.ifname); - err = tester_run(skel); - } else { - /* DUT */ - fprintf(stdout, "Starting test on device %s\n", env.ifname); - err = dut_run(skel); - } - -cleanup: - xdp_features__destroy(skel); - - return err < 0 ? -err : 0; -} diff --git a/tools/testing/selftests/bpf/xdp_features.h b/tools/testing/selftests/bpf/xdp_features.h index 2670c541713b..2fa7a2e156c7 100644 --- a/tools/testing/selftests/bpf/xdp_features.h +++ b/tools/testing/selftests/bpf/xdp_features.h @@ -1,20 +1,5 @@ /* SPDX-License-Identifier: GPL-2.0 */ -/* test commands */ -enum test_commands { - CMD_STOP, /* CMD */ - CMD_START, /* CMD */ - CMD_ECHO, /* CMD */ - CMD_ACK, /* CMD + data */ - CMD_GET_XDP_CAP, /* CMD */ - CMD_GET_STATS, /* CMD */ -}; +#define CMD_ECHO 0x4543484F /* 4 bytes magic */ -#define DUT_CTRL_PORT 12345 #define DUT_ECHO_PORT 12346 - -struct tlv_hdr { - __be16 type; - __be16 len; - __u8 data[]; -}; --- base-commit: b9a1776000bbc3b794a398e1ef8bec3dd6ed57ab change-id: 20240730-convert_xdp_tests-ccd66bfe33db Best regards, -- Alexis Lothoré, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

9 months

6
12
0 0

[PATCH bpf-next v4 0/2] Support eliding map lookup nullness

by Daniel Xu

This patch allows progs to elide a null check on statically known map lookup keys. In other words, if the verifier can statically prove that the lookup will be in-bounds, allow the prog to drop the null check. This is useful for two reasons: 1. Large numbers of nullness checks (especially when they cannot fail) unnecessarily pushes prog towards BPF_COMPLEXITY_LIMIT_JMP_SEQ. 2. It forms a tighter contract between programmer and verifier. For (1), bpftrace is starting to make heavier use of percpu scratch maps. As a result, for user scripts with large number of unrolled loops, we are starting to hit jump complexity verification errors. These percpu lookups cannot fail anyways, as we only use static key values. Eliding nullness probably results in less work for verifier as well. For (2), percpu scratch maps are often used as a larger stack, as the currrent stack is limited to 512 bytes. In these situations, it is desirable for the programmer to express: "this lookup should never fail, and if it does, it means I messed up the code". By omitting the null check, the programmer can "ask" the verifier to double check the logic. Changes in v4: * Only allow for CAP_BPF * Add test for stack growing upwards * Improve comment about stack growing upwards Changes in v3: * Check if stack is (erroneously) growing upwards * Mention in commit message why existing tests needed change Changes in v2: * Added a check for when R2 is not a ptr to stack * Added a check for when stack is uninitialized (no stack slot yet) * Updated existing tests to account for null elision * Added test case for when R2 can be both const and non-const Daniel Xu (2): bpf: verifier: Support eliding map lookup nullness bpf: selftests: verifier: Add nullness elision tests kernel/bpf/verifier.c | 73 ++++++- tools/testing/selftests/bpf/progs/iters.c | 14 +- .../selftests/bpf/progs/map_kptr_fail.c | 2 +- .../bpf/progs/verifier_array_access.c | 183 ++++++++++++++++++ .../selftests/bpf/progs/verifier_map_in_map.c | 2 +- .../testing/selftests/bpf/verifier/map_kptr.c | 2 +- 6 files changed, 265 insertions(+), 11 deletions(-) -- 2.46.0

9 months

2
3
0 0

[PATCH] selftests: Makefile: create OUTPUT dir

by Anders Roxell

When cross building kselftest out-of-tree the following issue can be seen: [...] make[4]: Entering directory '/src/kernel/linux/tools/testing/selftests/net/lib' CC csum /usr/lib/gcc-cross/aarch64-linux-gnu/13/../../../../aarch64-linux-gnu/bin/ld: cannot open output file /tmp/build/kselftest/net/lib/csum: No such file or directory collect2: error: ld returned 1 exit status [...] Create the output build directory before building the targets, solves this issue with building 'net/lib/csum'. Suggested-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org> --- tools/testing/selftests/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..05c143bcff6a 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -261,6 +261,7 @@ ifdef INSTALL_PATH @ret=1; \ for TARGET in $(TARGETS) $(INSTALL_DEP_TARGETS); do \ BUILD_TARGET=$$BUILD/$$TARGET; \ + mkdir -p $$BUILD_TARGET; \ $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET install \ INSTALL_PATH=$(INSTALL_PATH)/$$TARGET \ SRC_PATH=$(shell readlink -e $$(pwd)) \ -- 2.45.2

9 months

3
5
0 0

[PATCH net-next] selftests: net: csum: Clean up recv_verify_packet_ipv6

by Sean Anderson

Rename ip_len to payload_len since the length in this case refers only to the payload, and not the entire IP packet like for IPv4. While we're at it, just use the variable directly when calling recv_verify_packet_udp/tcp. Signed-off-by: Sean Anderson <sean.anderson(a)linux.dev> --- tools/testing/selftests/net/lib/csum.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/tools/testing/selftests/net/lib/csum.c b/tools/testing/selftests/net/lib/csum.c index e0a34e5e8dd5..27437590eeb5 100644 --- a/tools/testing/selftests/net/lib/csum.c +++ b/tools/testing/selftests/net/lib/csum.c @@ -675,22 +675,20 @@ static int recv_verify_packet_ipv6(void *nh, int len) { struct ipv6hdr *ip6h = nh; uint16_t proto = cfg_encap ? IPPROTO_UDP : cfg_proto; - uint16_t ip_len; + uint16_t payload_len; if (len < sizeof(*ip6h) || ip6h->nexthdr != proto) return -1; - ip_len = ntohs(ip6h->payload_len); - if (ip_len > len - sizeof(*ip6h)) + payload_len = ntohs(ip6h->payload_len); + if (payload_len > len - sizeof(*ip6h)) return -1; - len = ip_len; iph_addr_p = &ip6h->saddr; - if (proto == IPPROTO_TCP) - return recv_verify_packet_tcp(ip6h + 1, len); + return recv_verify_packet_tcp(ip6h + 1, payload_len); else - return recv_verify_packet_udp(ip6h + 1, len); + return recv_verify_packet_udp(ip6h + 1, payload_len); } /* return whether auxdata includes TP_STATUS_CSUM_VALID */ -- 2.35.1.1320.gc452695387.dirty

9 months

3
4
0 0

[PATCH net-next] selftests: mlxsw: rtnetlink: Use devlink_reload() API

by Petr Machata

From: Amit Cohen <amcohen(a)nvidia.com> The test runs "devlink reload" explicitly. Instead, it is better to use devlink_reload() which waits for udev events to be processed. Do not sleep after reload, as devlink_reload() blocks until all the netdevs are renamed. Signed-off-by: Amit Cohen <amcohen(a)nvidia.com> Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> Signed-off-by: Petr Machata <petrm(a)nvidia.com> --- tools/testing/selftests/drivers/net/mlxsw/rtnetlink.sh | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/drivers/net/mlxsw/rtnetlink.sh b/tools/testing/selftests/drivers/net/mlxsw/rtnetlink.sh index 893a693ad805..45a569618424 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/rtnetlink.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/rtnetlink.sh @@ -186,10 +186,7 @@ bridge_vlan_flags_test() # If we did not handle references correctly, then this should produce a # trace - devlink dev reload "$DEVLINK_DEV" - - # Allow netdevices to be re-created following the reload - sleep 20 + devlink_reload log_test "bridge vlan flags" } @@ -923,12 +920,9 @@ devlink_reload_test() # devlink reload can be performed without errors RET=0 - devlink dev reload "$DEVLINK_DEV" - check_err $? "devlink reload failed" + devlink_reload log_test "devlink reload - last test" - - sleep 20 } trap cleanup EXIT -- 2.45.0

9 months

2
1
0 0

[PATCH] selftests/vdso: Add linux/sched.h to fix CLONE_NEWTIME build error

by SurajSonawane2415

Fix build error in vdso_test_getrandom.c due to missing CLONE_NEWTIME. Include linux/sched.h to define CLONE_NEWTIME. Ensure successful compilation by resolving the missing header issue. Signed-off-by: SurajSonawane2415 <surajsonawane0215(a)gmail.com> --- tools/testing/selftests/vDSO/vdso_test_getrandom.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/vDSO/vdso_test_getrandom.c b/tools/testing/selftests/vDSO/vdso_test_getrandom.c index 72a1d9b43..3f2a4dbf8 100644 --- a/tools/testing/selftests/vDSO/vdso_test_getrandom.c +++ b/tools/testing/selftests/vDSO/vdso_test_getrandom.c @@ -22,6 +22,7 @@ #include <linux/random.h> #include <linux/compiler.h> #include <linux/ptrace.h> +#include <linux/sched.h> #include "../kselftest.h" #include "parse_vdso.h" -- 2.34.1

9 months

3
4
0 0

[RFC] MAINTAINERS: split kselftest entry into 'framework' and 'all'

by Jakub Kicinski

The testing effort is increasing throughout the community. The tests are generally merged into the subsystem trees, and are of relatively narrow interest. The patch volume on linux-kselftest(a)vger.kernel.org makes it hard to follow the changes to the framework, and discuss proposals. Create a new ML for "all" of kselftests (tests and framework), replacing the old list. Use the old list for framework changes only. It would cause less churn to create a ML for just the framework, but I prefer to use the shorter name for the list which has much more practical use. Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- Posting as an RFC because we need to create the new ML. CC: shuah(a)kernel.org CC: linux-kselftest(a)vger.kernel.org CC: workflows(a)vger.kernel.org --- MAINTAINERS | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index c27f3190737f..9a03dc1c8974 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12401,6 +12401,18 @@ S: Maintained Q: https://patchwork.kernel.org/project/linux-kselftest/list/ T: git git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git F: Documentation/dev-tools/kselftest* +F: tools/testing/selftests/kselftest/ +F: tools/testing/selftests/lib/ +F: tools/testing/selftests/lib.mk +F: tools/testing/selftests/Makefile +F: tools/testing/selftests/*.sh +F: tools/testing/selftests/*.h + +KERNEL SELFTEST TESTS +M: Shuah Khan <shuah(a)kernel.org> +M: Shuah Khan <skhan(a)linuxfoundation.org> +L: linux-kselftest-all(a)vger.kernel.org +S: Maintained F: tools/testing/selftests/ KERNEL SMB3 SERVER (KSMBD) -- 2.46.2

9 months

3
3
0 0

[PATCH RFT v9 0/8] fork: Support shadow stacks in clone3()

by Mark Brown

The kernel has recently added support for shadow stacks, currently x86 only using their CET feature but both arm64 and RISC-V have equivalent features (GCS and Zicfiss respectively), I am actively working on GCS[1]. With shadow stacks the hardware maintains an additional stack containing only the return addresses for branch instructions which is not generally writeable by userspace and ensures that any returns are to the recorded addresses. This provides some protection against ROP attacks and making it easier to collect call stacks. These shadow stacks are allocated in the address space of the userspace process. Our API for shadow stacks does not currently offer userspace any flexiblity for managing the allocation of shadow stacks for newly created threads, instead the kernel allocates a new shadow stack with the same size as the normal stack whenever a thread is created with the feature enabled. The stacks allocated in this way are freed by the kernel when the thread exits or shadow stacks are disabled for the thread. This lack of flexibility and control isn't ideal, in the vast majority of cases the shadow stack will be over allocated and the implicit allocation and deallocation is not consistent with other interfaces. As far as I can tell the interface is done in this manner mainly because the shadow stack patches were in development since before clone3() was implemented. Since clone3() is readily extensible let's add support for specifying a shadow stack when creating a new thread or process in a similar manner to how the normal stack is specified, keeping the current implicit allocation behaviour if one is not specified either with clone3() or through the use of clone(). The user must provide a shadow stack address and size, this must point to memory mapped for use as a shadow stackby map_shadow_stack() with a shadow stack token at the top of the stack. Please note that the x86 portions of this code are build tested only, I don't appear to have a system that can run CET avaible to me, I have done testing with an integration into my pending work for GCS. There is some possibility that the arm64 implementation may require the use of clone3() and explicit userspace allocation of shadow stacks, this is still under discussion. Please further note that the token consumption done by clone3() is not currently implemented in an atomic fashion, Rick indicated that he would look into fixing this if people are OK with the implementation. A new architecture feature Kconfig option for shadow stacks is added as here, this was suggested as part of the review comments for the arm64 GCS series and since we need to detect if shadow stacks are supported it seemed sensible to roll it in here. [1] https://lore.kernel.org/r/20231009-arm64-gcs-v6-0-78e55deaa4dd@kernel.org/ Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v9: - Pull token validation earlier and report problems with an error return to parent rather than signal delivery to the child. - Verify that the top of the supplied shadow stack is VM_SHADOW_STACK. - Rework token validation to only do the page mapping once. - Drop no longer needed support for testing for signals in selftest. - Fix typo in comments. - Link to v8: https://lore.kernel.org/r/20240808-clone3-shadow-stack-v8-0-0acf37caf14c@ke… Changes in v8: - Fix token verification with user specified shadow stack. - Don't track user managed shadow stacks for child processes. - Link to v7: https://lore.kernel.org/r/20240731-clone3-shadow-stack-v7-0-a9532eebfb1d@ke… Changes in v7: - Rebase onto v6.11-rc1. - Typo fixes. - Link to v6: https://lore.kernel.org/r/20240623-clone3-shadow-stack-v6-0-9ee7783b1fb9@ke… Changes in v6: - Rebase onto v6.10-rc3. - Ensure we don't try to free the parent shadow stack in error paths of x86 arch code. - Spelling fixes in userspace API document. - Additional cleanups and improvements to the clone3() tests to support the shadow stack tests. - Link to v5: https://lore.kernel.org/r/20240203-clone3-shadow-stack-v5-0-322c69598e4b@ke… Changes in v5: - Rebase onto v6.8-rc2. - Rework ABI to have the user allocate the shadow stack memory with map_shadow_stack() and a token. - Force inlining of the x86 shadow stack enablement. - Move shadow stack enablement out into a shared header for reuse by other tests. - Link to v4: https://lore.kernel.org/r/20231128-clone3-shadow-stack-v4-0-8b28ffe4f676@ke… Changes in v4: - Formatting changes. - Use a define for minimum shadow stack size and move some basic validation to fork.c. - Link to v3: https://lore.kernel.org/r/20231120-clone3-shadow-stack-v3-0-a7b8ed3e2acc@ke… Changes in v3: - Rebase onto v6.7-rc2. - Remove stale shadow_stack in internal kargs. - If a shadow stack is specified unconditionally use it regardless of CLONE_ parameters. - Force enable shadow stacks in the selftest. - Update changelogs for RISC-V feature rename. - Link to v2: https://lore.kernel.org/r/20231114-clone3-shadow-stack-v2-0-b613f8681155@ke… Changes in v2: - Rebase onto v6.7-rc1. - Remove ability to provide preallocated shadow stack, just specify the desired size. - Link to v1: https://lore.kernel.org/r/20231023-clone3-shadow-stack-v1-0-d867d0b5d4d0@ke… --- Mark Brown (8): Documentation: userspace-api: Add shadow stack API documentation selftests: Provide helper header for shadow stack testing mm: Introduce ARCH_HAS_USER_SHADOW_STACK fork: Add shadow stack support to clone3() selftests/clone3: Remove redundant flushes of output streams selftests/clone3: Factor more of main loop into test_clone3() selftests/clone3: Allow tests to flag if -E2BIG is a valid error code selftests/clone3: Test shadow stack support Documentation/userspace-api/index.rst | 1 + Documentation/userspace-api/shadow_stack.rst | 41 ++++ arch/x86/Kconfig | 1 + arch/x86/include/asm/shstk.h | 11 +- arch/x86/kernel/process.c | 2 +- arch/x86/kernel/shstk.c | 103 +++++++--- fs/proc/task_mmu.c | 2 +- include/linux/mm.h | 2 +- include/linux/sched/task.h | 18 ++ include/uapi/linux/sched.h | 13 +- kernel/fork.c | 114 +++++++++-- mm/Kconfig | 6 + tools/testing/selftests/clone3/clone3.c | 230 ++++++++++++++++++---- tools/testing/selftests/clone3/clone3_selftests.h | 40 +++- tools/testing/selftests/ksft_shstk.h | 63 ++++++ 15 files changed, 560 insertions(+), 87 deletions(-) --- base-commit: 8400291e289ee6b2bf9779ff1c83a291501f017b change-id: 20231019-clone3-shadow-stack-15d40d2bf536 Best regards, -- Mark Brown <broonie(a)kernel.org>

9 months

5
27
0 0

[PATCH v2] lib: math: Move kunit tests into tests/ subdir

by Luis Felipe Hernandez

This patch is a follow-up task from a discussion stemming from point 3 in a recent patch introducing the int_pow kunit test [1] and documentation regarding kunit test style and nomenclature [2]. Colocate all kunit test suites in lib/math/tests/ and follow recommended naming convention for files <suite>_kunit.c and kconfig entries CONFIG_<name>_KUNIT_TEST. Link: https://lore.kernel.org/all/CABVgOS=-vh5TqHFCq_jo=ffq8v_nGgr6JsPnOZag3e6+19… [1] Link: https://docs.kernel.org/dev-tools/kunit/style.html [2] Signed-off-by: Luis Felipe Hernandez <luis.hernandez093(a)gmail.com> --- Changes in v2: Fix cc recipient list inclusion in cover letter --- arch/m68k/configs/amiga_defconfig | 2 +- arch/m68k/configs/apollo_defconfig | 2 +- arch/m68k/configs/atari_defconfig | 2 +- arch/m68k/configs/bvme6000_defconfig | 2 +- arch/m68k/configs/hp300_defconfig | 2 +- arch/m68k/configs/mac_defconfig | 2 +- arch/m68k/configs/multi_defconfig | 2 +- arch/m68k/configs/mvme147_defconfig | 2 +- arch/m68k/configs/mvme16x_defconfig | 2 +- arch/m68k/configs/q40_defconfig | 2 +- arch/m68k/configs/sun3_defconfig | 2 +- arch/m68k/configs/sun3x_defconfig | 2 +- arch/powerpc/configs/ppc64_defconfig | 2 +- lib/Kconfig.debug | 6 +++--- lib/math/Makefile | 5 +---- lib/math/tests/Makefile | 5 ++++- lib/math/{test_div64.c => tests/div64_kunit.c} | 0 .../mul_u64_u64_div_u64_kunit.c} | 0 lib/math/{rational-test.c => tests/rational_kunit.c} | 0 19 files changed, 21 insertions(+), 21 deletions(-) rename lib/math/{test_div64.c => tests/div64_kunit.c} (100%) rename lib/math/{test_mul_u64_u64_div_u64.c => tests/mul_u64_u64_div_u64_kunit.c} (100%) rename lib/math/{rational-test.c => tests/rational_kunit.c} (100%) diff --git a/arch/m68k/configs/amiga_defconfig b/arch/m68k/configs/amiga_defconfig index d01dc47d52ea..7ba9311c084c 100644 --- a/arch/m68k/configs/amiga_defconfig +++ b/arch/m68k/configs/amiga_defconfig @@ -619,7 +619,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/apollo_defconfig b/arch/m68k/configs/apollo_defconfig index 46808e581d7b..273fe4032b85 100644 --- a/arch/m68k/configs/apollo_defconfig +++ b/arch/m68k/configs/apollo_defconfig @@ -576,7 +576,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/atari_defconfig b/arch/m68k/configs/atari_defconfig index 4469a7839c9d..9976cda99fc1 100644 --- a/arch/m68k/configs/atari_defconfig +++ b/arch/m68k/configs/atari_defconfig @@ -596,7 +596,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/bvme6000_defconfig b/arch/m68k/configs/bvme6000_defconfig index c0719322c028..f59082c8fe06 100644 --- a/arch/m68k/configs/bvme6000_defconfig +++ b/arch/m68k/configs/bvme6000_defconfig @@ -568,7 +568,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/hp300_defconfig b/arch/m68k/configs/hp300_defconfig index 8d429e63f8f2..6db3556da9ac 100644 --- a/arch/m68k/configs/hp300_defconfig +++ b/arch/m68k/configs/hp300_defconfig @@ -578,7 +578,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/mac_defconfig b/arch/m68k/configs/mac_defconfig index bafd33da27c1..25c06b5c83ee 100644 --- a/arch/m68k/configs/mac_defconfig +++ b/arch/m68k/configs/mac_defconfig @@ -595,7 +595,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/multi_defconfig b/arch/m68k/configs/multi_defconfig index 6f5ca3f85ea1..35e57e0ee139 100644 --- a/arch/m68k/configs/multi_defconfig +++ b/arch/m68k/configs/multi_defconfig @@ -681,7 +681,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/mvme147_defconfig b/arch/m68k/configs/mvme147_defconfig index d16b328c7136..d253b686119a 100644 --- a/arch/m68k/configs/mvme147_defconfig +++ b/arch/m68k/configs/mvme147_defconfig @@ -567,7 +567,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/mvme16x_defconfig b/arch/m68k/configs/mvme16x_defconfig index 80f6c15a5ed5..62bc6ad63783 100644 --- a/arch/m68k/configs/mvme16x_defconfig +++ b/arch/m68k/configs/mvme16x_defconfig @@ -568,7 +568,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/q40_defconfig b/arch/m68k/configs/q40_defconfig index 0e81589f0ee2..caba39c61bac 100644 --- a/arch/m68k/configs/q40_defconfig +++ b/arch/m68k/configs/q40_defconfig @@ -585,7 +585,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/sun3_defconfig b/arch/m68k/configs/sun3_defconfig index 8cd785290339..a348f645ed55 100644 --- a/arch/m68k/configs/sun3_defconfig +++ b/arch/m68k/configs/sun3_defconfig @@ -565,7 +565,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/m68k/configs/sun3x_defconfig b/arch/m68k/configs/sun3x_defconfig index 78035369f60f..f8b3cfc3275b 100644 --- a/arch/m68k/configs/sun3x_defconfig +++ b/arch/m68k/configs/sun3x_defconfig @@ -566,7 +566,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_TEST_DHRY=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_REED_SOLOMON_TEST=m CONFIG_ATOMIC64_SELFTEST=m CONFIG_ASYNC_RAID6_TEST=m diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig index a5e3e7f97f4d..f1f21765c0c1 100644 --- a/arch/powerpc/configs/ppc64_defconfig +++ b/arch/powerpc/configs/ppc64_defconfig @@ -435,7 +435,7 @@ CONFIG_KUNIT=m CONFIG_KUNIT_ALL_TESTS=m CONFIG_LKDTM=m CONFIG_TEST_MIN_HEAP=m -CONFIG_TEST_DIV64=m +CONFIG_DIV64_KUNIT_TEST=m CONFIG_BACKTRACE_SELF_TEST=m CONFIG_TEST_REF_TRACKER=m CONFIG_RBTREE_TEST=m diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index bc8faa4509e1..49807e18b0fc 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2281,7 +2281,7 @@ config TEST_SORT If unsure, say N. -config TEST_DIV64 +config DIV64_KUNIT_TEST tristate "64bit/32bit division and modulo test" depends on DEBUG_KERNEL || m help @@ -2291,7 +2291,7 @@ config TEST_DIV64 If unsure, say N. -config TEST_MULDIV64 +config MULDIV64_KUNIT_TEST tristate "mul_u64_u64_div_u64() test" depends on DEBUG_KERNEL || m help @@ -3074,7 +3074,7 @@ endmenu # "Rust" endmenu # Kernel hacking -config INT_POW_TEST +config INT_POW_KUNIT_TEST tristate "Integer exponentiation (int_pow) test" if !KUNIT_ALL_TESTS depends on KUNIT default KUNIT_ALL_TESTS diff --git a/lib/math/Makefile b/lib/math/Makefile index 3ef11305f8d2..1c489501ff57 100644 --- a/lib/math/Makefile +++ b/lib/math/Makefile @@ -5,7 +5,4 @@ obj-$(CONFIG_CORDIC) += cordic.o obj-$(CONFIG_PRIME_NUMBERS) += prime_numbers.o obj-$(CONFIG_RATIONAL) += rational.o -obj-$(CONFIG_INT_POW_TEST) += tests/int_pow_kunit.o -obj-$(CONFIG_TEST_DIV64) += test_div64.o -obj-$(CONFIG_TEST_MULDIV64) += test_mul_u64_u64_div_u64.o -obj-$(CONFIG_RATIONAL_KUNIT_TEST) += rational-test.o +obj-y += tests/ diff --git a/lib/math/tests/Makefile b/lib/math/tests/Makefile index 6a169123320a..f9a0a0e6b73a 100644 --- a/lib/math/tests/Makefile +++ b/lib/math/tests/Makefile @@ -1,3 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only -obj-$(CONFIG_INT_POW_TEST) += int_pow_kunit.o +obj-$(CONFIG_DIV64_KUNIT_TEST) += div64_kunit.o +obj-$(CONFIG_INT_POW_KUNIT_TEST) += int_pow_kunit.o +obj-$(CONFIG_MULDIV64_KUNIT_TEST) += mul_u64_u64_div_u64_kunit.o +obj-$(CONFIG_RATIONAL_KUNIT_TEST) += rational_kunit.o diff --git a/lib/math/test_div64.c b/lib/math/tests/div64_kunit.c similarity index 100% rename from lib/math/test_div64.c rename to lib/math/tests/div64_kunit.c diff --git a/lib/math/test_mul_u64_u64_div_u64.c b/lib/math/tests/mul_u64_u64_div_u64_kunit.c similarity index 100% rename from lib/math/test_mul_u64_u64_div_u64.c rename to lib/math/tests/mul_u64_u64_div_u64_kunit.c diff --git a/lib/math/rational-test.c b/lib/math/tests/rational_kunit.c similarity index 100% rename from lib/math/rational-test.c rename to lib/math/tests/rational_kunit.c -- 2.46.1

9 months

3
2
0 0

[RFC PATCH v2 0/5] Add support for the Bus Lock Threshold

by Manali Shukla

Misbehaving guests can cause bus locks to degrade the performance of a system. Non-WB (write-back) and misaligned locked RMW (read-modify-write) instructions are referred to as "bus locks" and require system wide synchronization among all processors to guarantee the atomicity. The bus locks can impose notable performance penalties for all processors within the system. Support for the Bus Lock Threshold is indicated by CPUID Fn8000_000A_EDX[29] BusLockThreshold=1, the VMCB provides a Bus Lock Threshold enable bit and an unsigned 16-bit Bus Lock Threshold count. VMCB intercept bit VMCB Offset Bits Function 14h 5 Intercept bus lock operations Bus lock threshold count VMCB Offset Bits Function 120h 15:0 Bus lock counter During VMRUN, the bus lock threshold count is fetched and stored in an internal count register. Prior to executing a bus lock within the guest, the processor verifies the count in the bus lock register. If the count is greater than zero, the processor executes the bus lock, reducing the count. However, if the count is zero, the bus lock operation is not performed, and instead, a Bus Lock Threshold #VMEXIT is triggered to transfer control to the Virtual Machine Monitor (VMM). A Bus Lock Threshold #VMEXIT is reported to the VMM with VMEXIT code 0xA5h, VMEXIT_BUSLOCK. EXITINFO1 and EXITINFO2 are set to 0 on a VMEXIT_BUSLOCK. On a #VMEXIT, the processor writes the current value of the Bus Lock Threshold Counter to the VMCB. More details about the Bus Lock Threshold feature can be found in AMD APM [1]. v1 -> v2 - Incorporated misc review comments from Sean. - Removed bus_lock_counter module parameter. - Set the value of bus_lock_counter to zero by default and reload the value by 1 in bus lock exit handler. - Add documentation for the behavioral difference for KVM_EXIT_BUS_LOCK. - Improved selftest for buslock to work on SVM and VMX. - Rewrite the commit messages. Patches are prepared on kvm-next/next (0cdcc99eeaed) Testing done: - Added a selftest for the Bus Lock Threshold functionality. - The bus lock threshold selftest has been tested on both Intel and AMD platforms. - Tested the Bus Lock Threshold functionality on SEV and SEV-ES guests. - Tested the Bus Lock Threshold functionality on nested guests. v1: https://lore.kernel.org/kvm/20240709175145.9986-4-manali.shukla@amd.com/T/ [1]: AMD64 Architecture Programmer's Manual Pub. 24593, April 2024, Vol 2, 15.14.5 Bus Lock Threshold. https://bugzilla.kernel.org/attachment.cgi?id=306250 Manali Shukla (3): x86/cpu: Add virt tag in /proc/cpuinfo x86/cpufeatures: Add CPUID feature bit for the Bus Lock Threshold KVM: X86: Add documentation about behavioral difference for KVM_EXIT_BUS_LOCK Nikunj A Dadhania (2): KVM: SVM: Enable Bus lock threshold exit KVM: selftests: Add bus lock exit test Documentation/virt/kvm/api.rst | 5 + arch/x86/include/asm/cpufeature.h | 1 + arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/svm.h | 5 +- arch/x86/include/uapi/asm/svm.h | 2 + arch/x86/kernel/cpu/mkcapflags.sh | 3 + arch/x86/kernel/cpu/proc.c | 5 + arch/x86/kvm/svm/nested.c | 12 ++ arch/x86/kvm/svm/svm.c | 29 ++++ tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/x86_64/kvm_buslock_test.c | 130 ++++++++++++++++++ 11 files changed, 193 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/kvm/x86_64/kvm_buslock_test.c base-commit: 0cdcc99eeaedf2422c80d75760293fdbb476cec1 -- 2.34.1

9 months

3
9
0 0

[PATCH v2] selftest: remoteproc: Add basic test for start/stop sequence

by Wasim Nazir

This test includes: 1) Start/stop test for each rproc instance sequencially 2) Start/stop test for all rproc instances concurrently Changes in v2: - Update commit message - Addressed start/stop flow Signed-off-by: Wasim Nazir <quic_wasimn(a)quicinc.com> diff --git a/MAINTAINERS b/MAINTAINERS index a77770cd96b8..02ebad5ae790 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19596,6 +19596,7 @@ F: Documentation/staging/remoteproc.rst F: drivers/remoteproc/ F: include/linux/remoteproc.h F: include/linux/remoteproc/ +F: tools/testing/selftests/remoteproc/ REMOTE PROCESSOR MESSAGING (RPMSG) SUBSYSTEM M: Bjorn Andersson <andersson(a)kernel.org> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..0c8a0f427d01 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -82,6 +82,7 @@ TARGETS += proc TARGETS += pstore TARGETS += ptrace TARGETS += openat2 +TARGETS += remoteproc TARGETS += resctrl TARGETS += riscv TARGETS += rlimits diff --git a/tools/testing/selftests/remoteproc/Makefile b/tools/testing/selftests/remoteproc/Makefile new file mode 100644 index 000000000000..a84b3934fd36 --- /dev/null +++ b/tools/testing/selftests/remoteproc/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 +TEST_PROGS := remoteproc_test.sh + +include ../lib.mk diff --git a/tools/testing/selftests/remoteproc/config b/tools/testing/selftests/remoteproc/config new file mode 100644 index 000000000000..a5c237d2f3b4 --- /dev/null +++ b/tools/testing/selftests/remoteproc/config @@ -0,0 +1 @@ +CONFIG_REMOTEPROC=y diff --git a/tools/testing/selftests/remoteproc/remoteproc_test.sh b/tools/testing/selftests/remoteproc/remoteproc_test.sh new file mode 100644 index 000000000000..589368285307 --- /dev/null +++ b/tools/testing/selftests/remoteproc/remoteproc_test.sh @@ -0,0 +1,134 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved. +# + +DIR="$(dirname $(readlink -f "$0"))" + +KTAP_HELPERS="${DIR}/../kselftest/ktap_helpers.sh" +if [ -e "$KTAP_HELPERS" ]; then + . "$KTAP_HELPERS" +else + echo -n "1..0 # SKIP $KTAP_HELPERS file not found" + exit 4 +fi + +RPROC_SYS=/sys/class/remoteproc +RPROC_SEQ_SLEEP=5 +rproc_instances= +# Declare an array to save initial states of each instance +org_instance_to_state="" +num_tests=0 +test_err=0 + +check_error() { + if [ $? -ne 0 ]; then + test_err=$((test_err+1)) + ktap_print_msg "$@" + fi +} + +rproc_stop_instances() { + for instance in ${rproc_instances}; do + rproc=${RPROC_SYS}/$instance + rproc_name=$(cat $rproc/name) + rproc_state=$(cat $rproc/state) + + echo stop > "$rproc/state" + check_error "$rproc_name state-stop failed at state $rproc_state" + done + sleep ${RPROC_SEQ_SLEEP} +} + +rproc_start_instances() { + for instance in ${rproc_instances}; do + rproc=${RPROC_SYS}/$instance + rproc_name=$(cat $rproc/name) + rproc_state=$(cat $rproc/state) + + echo start > "$rproc/state" + check_error "$rproc_name state-start failed at state $rproc_state" + done + sleep ${RPROC_SEQ_SLEEP} +} + +rproc_seq_test_instance_one() { + instance=$1 + rproc=${RPROC_SYS}/$instance + rproc_name=$(cat $rproc/name) + rproc_state=$(cat $rproc/state) + ktap_print_msg "Testing rproc sequence for $rproc_name" + + # Reset test_err value + test_err=0 + + # Begin start/stop sequence + echo start > "$rproc/state" + check_error "$rproc_name state-start failed at state $rproc_state" + + sleep ${RPROC_SEQ_SLEEP} + + echo stop > "$rproc/state" + check_error "$rproc_name state-stop failed at state $rproc_state" + + if [ $test_err -ne 0 ]; then + ktap_test_fail "$rproc_name" + else + ktap_test_pass "$rproc_name" + fi +} + +rproc_seq_test_instances_concurrently() { + # Reset test_err value + test_err=0 + + rproc_start_instances + + rproc_stop_instances + + if [ $test_err -ne 0 ]; then + ktap_test_fail "for any of $rproc_instances" + else + ktap_test_pass "for all $rproc_instances" + fi +} + +ktap_print_header + +if [ ! -d "${RPROC_SYS}" ]; then + ktap_skip_all "${RPROC_SYS} doesn't exist." + exit "${KSFT_SKIP}" +fi + +rproc_instances=$(find ${RPROC_SYS}/remoteproc* -maxdepth 1 -exec basename {} \;) +num_tests=$(echo ${rproc_instances} | wc -w) +if [ "${num_tests}" -eq 0 ]; then + ktap_skip_all "${RPROC_SYS}/remoteproc* doesn't exist." + exit "${KSFT_SKIP}" +fi + +# Total tests will be: +# 1) Seq tests for each instance sequencially +# 2) Seq tests for all instances concurrently +num_tests=$((num_tests+1)) + +ktap_set_plan "${num_tests}" + +# Stop all instances +rproc_stop_instances + +# Test 1 +ktap_print_msg "Testing rproc start/stop sequence for each instance sequencially" +for instance in ${rproc_instances}; do + rproc_seq_test_instance_one $instance +done + +# Test 2 +ktap_print_msg "Testing rproc start/stop sequence for all instances concurrently" +rproc_seq_test_instances_concurrently + +# Restore all instances +rproc_start_instances + +ktap_finished -- 2.46.1

9 months

2
2
0 0

[PATCH] selftests/net: Add missing va_end.

by zhangjiao2

From: zhang jiao <zhangjiao2(a)cmss.chinamobile.com> There is no va_end after va_copy, just add it. Signed-off-by: zhang jiao <zhangjiao2(a)cmss.chinamobile.com> --- tools/testing/selftests/net/tcp_ao/lib/aolib.h | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/net/tcp_ao/lib/aolib.h b/tools/testing/selftests/net/tcp_ao/lib/aolib.h index db44e77428dd..5db2f65cddc4 100644 --- a/tools/testing/selftests/net/tcp_ao/lib/aolib.h +++ b/tools/testing/selftests/net/tcp_ao/lib/aolib.h @@ -46,6 +46,7 @@ static inline char *test_snprintf(const char *fmt, va_list vargs) va_copy(tmp, vargs); n = vsnprintf(ret, size, fmt, tmp); + va_end(tmp); if (n < 0) return NULL; -- 2.33.0

9 months

3
2
0 0

[PATCH v3 0/1] Add KUnit tests for llist

by Artur Alves

Hi all, This is part of a hackathon organized by LKCAMP[1], focused on writing tests using KUnit. We reached out a while ago asking for advice on what would be a useful contribution[2] and ended up choosing data structures that did not yet have tests. This patch adds tests for the llist data structure, defined in include/linux/llist.h, and is inspired by the KUnit tests for the doubly linked list in lib/list-test.c[3]. It is important to note that this patch depends on the patch referenced in [4], as it utilizes the newly created lib/tests/ subdirectory. [1] https://lkcamp.dev/about/ [2] https://lore.kernel.org/all/Zktnt7rjKryTh9-N@arch/ [3] https://elixir.bootlin.com/linux/latest/source/lib/list-test.c [4] https://lore.kernel.org/all/20240720181025.work.002-kees@kernel.org/ --- Changes in v3: - Resolved checkpatch warnings: - Renamed tests for macros starting with 'for_each' - Removed link from commit message - Replaced hardcoded constants with ENTRIES_SIZE - Updated initialization of llist_node array - Fixed typos - Update Kconfig.debug message for llist_kunit Changes in v2: - Add MODULE_DESCRIPTION() - Move the tests from lib/llist_kunit.c to lib/tests/llist_kunit.c - Change the license from "GPL v2" to "GPL" Artur Alves (1): lib/llist_kunit.c: add KUnit tests for llist lib/Kconfig.debug | 11 ++ lib/tests/Makefile | 1 + lib/tests/llist_kunit.c | 358 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 370 insertions(+) create mode 100644 lib/tests/llist_kunit.c -- 2.46.0

9 months

5
10
0 0

[PATCH slab hotfixes 0/2] slub kunit tests fixes for 6.12

by Vlastimil Babka

The SLUB changes for 6.12 included new kunit tests that resulted in noisy warnings, which we normally suppress, and a boot lockup in some configurations in case the kunit tests are built-in. The warnings are addressed in Patch 1. The lockups I couldn't reproduce, but inspecting boot initialization order makes me suspect the tests (which call few RCU operations) are being executed a bit too early before RCU finishes initialization. Moving the exection later seems to do the trick, so I'd like to ask kunit folks to ack this change (Patch 2). If RCU folks have any insights, it would be welcome too. So these are now fixes for 4e1c44b3db79 ("kunit, slub: add test_kfree_rcu() and test_leak_destroy()") Once sent as a full patch, I also want to include comment fixes from Ulad for kvfree_rcu_queue_batch(): https://lore.kernel.org/all/CA%2BKHdyV%3D0dpJX_v_tcuTQ-_ree-Yb9ch3F_HqfT4Yn… The plan is to take the fixes via slab tree for a 6.12 rcX. Signed-off-by: Vlastimil Babka <vbabka(a)suse.cz> --- Vlastimil Babka (2): mm, slab: suppress warnings in test_leak_destroy kunit test kunit: move call to kunit_run_all_tests() after rcu_end_inkernel_boot() init/main.c | 4 ++-- lib/slub_kunit.c | 4 ++-- mm/slab.h | 6 ++++++ mm/slab_common.c | 5 +++-- mm/slub.c | 5 +++-- 5 files changed, 16 insertions(+), 8 deletions(-) --- base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc change-id: 20240930-b4-slub-kunit-fix-6fba4d1c1742 Best regards, -- Vlastimil Babka <vbabka(a)suse.cz>

9 months

3
5
0 0

[PATCH] Revert "list: test: fix tests for list_cut_position()"

by Guenter Roeck

This reverts commit e620799c414a035dea1208bcb51c869744931dbb. The commit introduces unit test failures. Expected cur == &entries[i], but cur == 0000037fffadfd80 &entries[i] == 0000037fffadfd60 # list_test_list_cut_position: pass:0 fail:1 skip:0 total:1 not ok 21 list_test_list_cut_position # list_test_list_cut_before: EXPECTATION FAILED at lib/list-test.c:444 Expected cur == &entries[i], but cur == 0000037fffa9fd70 &entries[i] == 0000037fffa9fd60 # list_test_list_cut_before: EXPECTATION FAILED at lib/list-test.c:444 Expected cur == &entries[i], but cur == 0000037fffa9fd80 &entries[i] == 0000037fffa9fd70 Revert it. Fixes: e620799c414a ("list: test: fix tests for list_cut_position()") Cc: I Hsin Cheng <richard120310(a)gmail.com> Cc: David Gow <davidgow(a)google.com> Cc: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Guenter Roeck <linux(a)roeck-us.net> --- lib/list-test.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/lib/list-test.c b/lib/list-test.c index 4f3dc75baec1..e207c4c98d70 100644 --- a/lib/list-test.c +++ b/lib/list-test.c @@ -408,13 +408,10 @@ static void list_test_list_cut_position(struct kunit *test) KUNIT_EXPECT_EQ(test, i, 2); - i = 0; list_for_each(cur, &list1) { KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); i++; } - - KUNIT_EXPECT_EQ(test, i, 1); } static void list_test_list_cut_before(struct kunit *test) @@ -439,13 +436,10 @@ static void list_test_list_cut_before(struct kunit *test) KUNIT_EXPECT_EQ(test, i, 1); - i = 0; list_for_each(cur, &list1) { KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); i++; } - - KUNIT_EXPECT_EQ(test, i, 2); } static void list_test_list_splice(struct kunit *test) -- 2.45.2

9 months

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Re: [PATCH 6.6 000/538] 6.6.54-rc1 review

by Naresh Kamboju

On Wed, 2 Oct 2024 at 19:56, Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> wrote: > > This is the start of the stable review cycle for the 6.6.54 release. > There are 538 patches in this series, all will be posted as a response > to this one. If anyone has any issues with these being applied, please > let me know. > > Responses should be made by Fri, 04 Oct 2024 12:56:13 +0000. > Anything received after that time might be too late. > > The whole patch series can be found in one patch at: > https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.54-rc1… > or in the git tree and branch at: > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y > and the diffstat can be found below. > > thanks, > > greg k-h As other reported selftests bpf build failed, libbpf.c: In function 'bpf_object__create_map': libbpf.c:5215:50: error: 'BPF_F_VTYPE_BTF_OBJ_FD' undeclared (first use in this function) 5215 | create_attr.map_flags |= BPF_F_VTYPE_BTF_OBJ_FD; | ^~~~~~~~~~~~~~~~~~~~~~ libbpf.c:5215:50: note: each undeclared identifier is reported only once for each function it appears in due to commit, 9e926acda0c2e libbpf: Find correct module BTFs for struct_ops maps and progs. Build log: ------- - https://storage.tuxsuite.com/public/linaro/lkft/builds/2msz2dGbiCYZjR2hPFlN… Reported-by: Linux Kernel Functional Testing <lkft(a)linaro.org> ## Build * kernel: 6.6.54-rc1 * git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git * git commit: 1bbd78667e8e467cac0a2bc31d183b9d9983f448 * git describe: v6.6.53-539-g1bbd78667e8e * test details: https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.5… ## Test Regressions (compared to v6.6.51-145-g3ecfbb62e37a) ## Metric Regressions (compared to v6.6.51-145-g3ecfbb62e37a) ## Test Fixes (compared to v6.6.51-145-g3ecfbb62e37a) ## Metric Fixes (compared to v6.6.51-145-g3ecfbb62e37a) ## Test result summary total: 170988, pass: 150287, fail: 1587, skip: 18917, xfail: 197 ## Build Summary * arc: 5 total, 5 passed, 0 failed * arm: 129 total, 129 passed, 0 failed * arm64: 41 total, 41 passed, 0 failed * i386: 28 total, 26 passed, 2 failed * mips: 26 total, 25 passed, 1 failed * parisc: 4 total, 4 passed, 0 failed * powerpc: 36 total, 35 passed, 1 failed * riscv: 10 total, 10 passed, 0 failed * s390: 14 total, 13 passed, 1 failed * sh: 10 total, 10 passed, 0 failed * sparc: 7 total, 7 passed, 0 failed * x86_64: 33 total, 33 passed, 0 failed ## Test suites summary * boot * commands * kselftest-arm64 * kselftest-breakpoints * kselftest-capabilities * kselftest-cgroup * kselftest-clone3 * kselftest-core * kselftest-cpu-hotplug * kselftest-cpufreq * kselftest-efivarfs * kselftest-exec * kselftest-filesystems * kselftest-filesystems-binderfs * kselftest-filesystems-epoll * kselftest-firmware * kselftest-fpu * kselftest-ftrace * kselftest-futex * kselftest-gpio * kselftest-intel_pstate * kselftest-ipc * kselftest-kcmp * kselftest-kvm * kselftest-livepatch * kselftest-membarrier * kselftest-memfd * kselftest-mincore * kselftest-mqueue * kselftest-net * kselftest-net-mptcp * kselftest-openat2 * kselftest-ptrace * kselftest-rseq * kselftest-rtc * kselftest-seccomp * kselftest-sigaltstack * kselftest-size * kselftest-tc-testing * kselftest-timers * kselftest-tmpfs * kselftest-tpm2 * kselftest-user_events * kselftest-vDSO * kselftest-watchdog * kselftest-x86 * kunit * kvm-unit-tests * libgpiod * libhugetlbfs * log-parser-boot * log-parser-test * ltp-commands * ltp-containers * ltp-controllers * ltp-cpuhotplug * ltp-crypto * ltp-cve * ltp-dio * ltp-fcntl-locktests * ltp-fs * ltp-fs_bind * ltp-fs_perms_simple * ltp-hugetlb * ltp-ipc * ltp-math * ltp-mm * ltp-nptl * ltp-pty * ltp-sched * ltp-smoke * ltp-syscalls * ltp-tracing * perf * rcutorture -- Linaro LKFT https://lkft.linaro.org

9 months

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kselftest/fixes build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc1-9-gc66be905cda24)

by kernelci.org bot

kselftest/fixes build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc1-9-gc66be905cda24) Full Build Summary: https://kernelci.org/build/kselftest/branch/fixes/kernel/v6.12-rc1-9-gc66be… Tree: kselftest Branch: fixes Git Describe: v6.12-rc1-9-gc66be905cda24 Git Commit: c66be905cda24fb782b91053b196bd2e966f95b7 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

9 months

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[PATCH net v4 0/2] bpf: devmap: provide rxq after redirect

by Florian Kauer

rxq contains a pointer to the device from where the redirect happened. Currently, the BPF program that was executed after a redirect via BPF_MAP_TYPE_DEVMAP* does not have it set. Add bugfix and related selftest. Signed-off-by: Florian Kauer <florian.kauer(a)linutronix.de> --- Changes in v4: - return -> goto out_close, thanks Toke - Link to v3: https://lore.kernel.org/r/20240909-devel-koalo-fix-ingress-ifindex-v3-0-662… Changes in v3: - initialize skel to NULL, thanks Stanislav - Link to v2: https://lore.kernel.org/r/20240906-devel-koalo-fix-ingress-ifindex-v2-0-4ca… Changes in v2: - changed fixes tag - added selftest - Link to v1: https://lore.kernel.org/r/20240905-devel-koalo-fix-ingress-ifindex-v1-1-d12… --- Florian Kauer (2): bpf: devmap: provide rxq after redirect bpf: selftests: send packet to devmap redirect XDP kernel/bpf/devmap.c | 11 +- .../selftests/bpf/prog_tests/xdp_devmap_attach.c | 114 +++++++++++++++++++-- 2 files changed, 115 insertions(+), 10 deletions(-) --- base-commit: 8e69c96df771ab469cec278edb47009351de4da6 change-id: 20240905-devel-koalo-fix-ingress-ifindex-b9293d471db6 Best regards, -- Florian Kauer <florian.kauer(a)linutronix.de>

9 months

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[PATCH v5 v6.11 v5.15 v5.4 v4.19 1/1] selftests: breakpoints: use remaining time to check if suspend succeed

by Yifei Liu

step_after_suspend_test fails with device busy error while writing to /sys/power/state to start suspend. The test believes it failed to enter suspend state with $ sudo ./step_after_suspend_test TAP version 13 Bail out! Failed to enter Suspend state However, in the kernel message, I indeed see the system get suspended and then wake up later. [611172.033108] PM: suspend entry (s2idle) [611172.044940] Filesystems sync: 0.006 seconds [611172.052254] Freezing user space processes [611172.059319] Freezing user space processes completed (elapsed 0.001 seconds) [611172.067920] OOM killer disabled. [611172.072465] Freezing remaining freezable tasks [611172.080332] Freezing remaining freezable tasks completed (elapsed 0.001 seconds) [611172.089724] printk: Suspending console(s) (use no_console_suspend to debug) [611172.117126] serial 00:03: disabled some other hardware get reconnected [611203.136277] OOM killer enabled. [611203.140637] Restarting tasks ... [611203.141135] usb 1-8.1: USB disconnect, device number 7 [611203.141755] done. [611203.155268] random: crng reseeded on system resumption [611203.162059] PM: suspend exit After investigation, I noticed that for the code block if (write(power_state_fd, "mem", strlen("mem")) != strlen("mem")) ksft_exit_fail_msg("Failed to enter Suspend state\n"); The write will return -1 and errno is set to 16 (device busy). It should be caused by the write function is not successfully returned before the system suspend and the return value get messed when waking up. As a result, It may be better to check the time passed of those few instructions to determine whether the suspend is executed correctly for it is pretty hard to execute those few lines for 5 seconds. The timer to wake up the system is set to expire after 5 seconds and no re-arm. If the timer remaining time is 0 second and 0 nano secomd, it means the timer expired and wake the system up. Otherwise, the system could be considered to enter the suspend state failed if there is any remaining time. After appling this patch, the test would not fail for it believes the system does not go to suspend by mistake. It now could continue to the rest part of the test after suspend. Fixes: bfd092b8c272 ("selftests: breakpoint: add step_after_suspend_test") Reported-by: Sinadin Shan <sinadin.shan(a)oracle.com> Signed-off-by: Yifei Liu <yifei.l.liu(a)oracle.com> --- v4->v5: Remove the above quotes in the first part. remove the incorrect format which could confuse the git. --- .../testing/selftests/breakpoints/step_after_suspend_test.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/breakpoints/step_after_suspend_test.c b/tools/testing/selftests/breakpoints/step_after_suspend_test.c index dfec31fb9b30d..8d275f03e977f 100644 --- a/tools/testing/selftests/breakpoints/step_after_suspend_test.c +++ b/tools/testing/selftests/breakpoints/step_after_suspend_test.c @@ -152,7 +152,10 @@ void suspend(void) if (err < 0) ksft_exit_fail_msg("timerfd_settime() failed\n"); - if (write(power_state_fd, "mem", strlen("mem")) != strlen("mem")) + system("(echo mem > /sys/power/state) 2> /dev/null"); + + timerfd_gettime(timerfd, &spec); + if (spec.it_value.tv_sec != 0 || spec.it_value.tv_nsec != 0) ksft_exit_fail_msg("Failed to enter Suspend state\n"); close(timerfd); -- 2.46.0

9 months

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[PATCH v3] kselftest/devices/probe: Fix SyntaxWarning in regex strings for Python3

by Alessandro Zanni

Insert raw strings to prevent Python3 from interpreting string literals as Unicode strings and "\d" as invalid escaped sequence. Fix the warnings: tools/testing/selftests/devices/probe/test_discoverable_devices.py:48: SyntaxWarning: invalid escape sequence '\d' usb_controller_sysfs_dir = "usb[\d]+" tools/testing/selftests/devices/probe/test_discoverable_devices.py: 94: SyntaxWarning: invalid escape sequence '\d' re_usb_version = re.compile("PRODUCT=.*/(\d)/.*") Fixes: dacf1d7a78bf ("kselftest: Add test to verify probe of devices from discoverable buses") Reviewed-by: Nícolas F. R. A. Prado <nfraprado(a)collabora.com> Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- Notes: v3: Reduce changelog lines lengthy, add warning messages v2: Imperative mode description, add previous commit tag fix .../selftests/devices/probe/test_discoverable_devices.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/devices/probe/test_discoverable_devices.py b/tools/testing/selftests/devices/probe/test_discoverable_devices.py index d94a74b8a054..d7a2bb91c807 100755 --- a/tools/testing/selftests/devices/probe/test_discoverable_devices.py +++ b/tools/testing/selftests/devices/probe/test_discoverable_devices.py @@ -45,7 +45,7 @@ def find_pci_controller_dirs(): def find_usb_controller_dirs(): - usb_controller_sysfs_dir = "usb[\d]+" + usb_controller_sysfs_dir = r"usb[\d]+" dir_regex = re.compile(usb_controller_sysfs_dir) for d in os.scandir(sysfs_usb_devices): @@ -91,7 +91,7 @@ def get_acpi_uid(sysfs_dev_dir): def get_usb_version(sysfs_dev_dir): - re_usb_version = re.compile("PRODUCT=.*/(\d)/.*") + re_usb_version = re.compile(r"PRODUCT=.*/(\d)/.*") with open(os.path.join(sysfs_dev_dir, "uevent")) as f: return int(re_usb_version.search(f.read()).group(1)) -- 2.43.0

9 months

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[PATCH v4 0/3] selftests: livepatch: test livepatching a kprobed function

by Michael Vetter

Thanks to Miroslav, Petr and Marcos for the reviews! V4: Use variable for /sys/kernel/debug. Be consistent with "" around variables. Fix path in commit message to /sys/kernel/debug/kprobes/enabled. V3: Save and restore kprobe state also when test fails, by integrating it into setup_config() and cleanup(). Rename SYSFS variables in a more logical way. Sort test modules in alphabetical order. Rename module description. V2: Save and restore kprobe state. Michael Vetter (3): selftests: livepatch: rename KLP_SYSFS_DIR to SYSFS_KLP_DIR selftests: livepatch: save and restore kprobe state selftests: livepatch: test livepatching a kprobed function tools/testing/selftests/livepatch/Makefile | 3 +- .../testing/selftests/livepatch/functions.sh | 19 ++++-- .../selftests/livepatch/test-kprobe.sh | 62 +++++++++++++++++++ .../selftests/livepatch/test_modules/Makefile | 3 +- .../livepatch/test_modules/test_klp_kprobe.c | 38 ++++++++++++ 5 files changed, 117 insertions(+), 8 deletions(-) create mode 100755 tools/testing/selftests/livepatch/test-kprobe.sh create mode 100644 tools/testing/selftests/livepatch/test_modules/test_klp_kprobe.c -- 2.46.1

9 months

3
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[PATCH slab hotfixes v2 0/2] slub kunit tests fixes for 6.12

by Vlastimil Babka

The SLUB changes for 6.12 included new kunit tests that resulted in noisy warnings, which we normally suppress, and a boot lockup in some configurations in case the kunit tests are built-in. The warnings are addressed in Patch 1. The lockups I couldn't reproduce, but inspecting boot initialization order makes me suspect the test_kfree_rcu() calling kfree_rcu() which is too early before RCU finishes initialization. Moving the exection later was tried but broke tests marking their code as __init so Patch 2 skips the test when the slub kunit tests are built-in. So these are now fixes for 4e1c44b3db79 ("kunit, slub: add test_kfree_rcu() and test_leak_destroy()") The plan is to take the fixes via slab tree for a 6.12 rcX. Signed-off-by: Vlastimil Babka <vbabka(a)suse.cz> --- Changes in v2: - patch 2 skips the test when built-in instead of moving kunit execution later - Link to v1: https://lore.kernel.org/r/20240930-b4-slub-kunit-fix-v1-0-32ca9dbbbc11@suse… --- Vlastimil Babka (2): mm, slab: suppress warnings in test_leak_destroy kunit test slub/kunit: skip test_kfree_rcu when the slub kunit test is built-in lib/slub_kunit.c | 18 ++++++++++++------ mm/slab.h | 6 ++++++ mm/slab_common.c | 5 +++-- mm/slub.c | 5 +++-- 4 files changed, 24 insertions(+), 10 deletions(-) --- base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc change-id: 20240930-b4-slub-kunit-fix-6fba4d1c1742 Best regards, -- Vlastimil Babka <vbabka(a)suse.cz>

9 months

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[PATCH RFC v3 0/2] mm: Introduce ADDR_LIMIT_47BIT personality flag

by Charlie Jenkins

Some applications rely on placing data in free bits addresses allocated by mmap. Various architectures (eg. x86, arm64, powerpc) restrict the address returned by mmap to be less than the 48-bit address space, unless the hint address uses more than 47 bits (the 48th bit is reserved for the kernel address space). The riscv architecture needs a way to similarly restrict the virtual address space. On the riscv port of OpenJDK an error is thrown if attempted to run on the 57-bit address space, called sv57 [1]. golang has a comment that sv57 support is not complete, but there are some workarounds to get it to mostly work [2]. These applications work on x86 because x86 does an implicit 47-bit restriction of mmap() address that contain a hint address that is less than 48 bits. Instead of implicitly restricting the address space on riscv (or any current/future architecture), provide a flag to the personality syscall that can be used to ensure an application works in any arbitrary VA space. A similar feature has already been implemented by the personality syscall in ADDR_LIMIT_32BIT. This flag will also allow seemless compatibility between all architectures, so applications like Go and OpenJDK that use bits in a virtual address can request the exact number of bits they need in a generic way. The flag can be checked inside of vm_unmapped_area() so that this flag does not have to be handled individually by each architecture. Link: https://github.com/openjdk/jdk/blob/f080b4bb8a75284db1b6037f8c00ef3b1ef1add… [1] Link: https://github.com/golang/go/blob/9e8ea567c838574a0f14538c0bbbd83c3215aa55/… [2] To: Arnd Bergmann <arnd(a)arndb.de> To: Richard Henderson <richard.henderson(a)linaro.org> To: Ivan Kokshaysky <ink(a)jurassic.park.msu.ru> To: Matt Turner <mattst88(a)gmail.com> To: Vineet Gupta <vgupta(a)kernel.org> To: Russell King <linux(a)armlinux.org.uk> To: Guo Ren <guoren(a)kernel.org> To: Huacai Chen <chenhuacai(a)kernel.org> To: WANG Xuerui <kernel(a)xen0n.name> To: Thomas Bogendoerfer <tsbogend(a)alpha.franken.de> To: James E.J. Bottomley <James.Bottomley(a)HansenPartnership.com> To: Helge Deller <deller(a)gmx.de> To: Michael Ellerman <mpe(a)ellerman.id.au> To: Nicholas Piggin <npiggin(a)gmail.com> To: Christophe Leroy <christophe.leroy(a)csgroup.eu> To: Naveen N Rao <naveen(a)kernel.org> To: Alexander Gordeev <agordeev(a)linux.ibm.com> To: Gerald Schaefer <gerald.schaefer(a)linux.ibm.com> To: Heiko Carstens <hca(a)linux.ibm.com> To: Vasily Gorbik <gor(a)linux.ibm.com> To: Christian Borntraeger <borntraeger(a)linux.ibm.com> To: Sven Schnelle <svens(a)linux.ibm.com> To: Yoshinori Sato <ysato(a)users.sourceforge.jp> To: Rich Felker <dalias(a)libc.org> To: John Paul Adrian Glaubitz <glaubitz(a)physik.fu-berlin.de> To: David S. Miller <davem(a)davemloft.net> To: Andreas Larsson <andreas(a)gaisler.com> To: Thomas Gleixner <tglx(a)linutronix.de> To: Ingo Molnar <mingo(a)redhat.com> To: Borislav Petkov <bp(a)alien8.de> To: Dave Hansen <dave.hansen(a)linux.intel.com> To: x86(a)kernel.org To: H. Peter Anvin <hpa(a)zytor.com> To: Andy Lutomirski <luto(a)kernel.org> To: Peter Zijlstra <peterz(a)infradead.org> To: Muchun Song <muchun.song(a)linux.dev> To: Andrew Morton <akpm(a)linux-foundation.org> To: Liam R. Howlett <Liam.Howlett(a)oracle.com> To: Vlastimil Babka <vbabka(a)suse.cz> To: Lorenzo Stoakes <lorenzo.stoakes(a)oracle.com> To: Shuah Khan <shuah(a)kernel.org> To: Christoph Hellwig <hch(a)infradead.org> To: Michal Hocko <mhocko(a)suse.com> To: "Kirill A. Shutemov" <kirill(a)shutemov.name> To: Chris Torek <chris.torek(a)gmail.com> Cc: linux-arch(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Cc: linux-alpha(a)vger.kernel.org Cc: linux-snps-arc(a)lists.infradead.org Cc: linux-arm-kernel(a)lists.infradead.org Cc: linux-csky(a)vger.kernel.org Cc: loongarch(a)lists.linux.dev Cc: linux-mips(a)vger.kernel.org Cc: linux-parisc(a)vger.kernel.org Cc: linuxppc-dev(a)lists.ozlabs.org Cc: linux-s390(a)vger.kernel.org Cc: linux-sh(a)vger.kernel.org Cc: sparclinux(a)vger.kernel.org Cc: linux-mm(a)kvack.org Cc: linux-kselftest(a)vger.kernel.org Cc: linux-abi-devel(a)lists.sourceforge.net Signed-off-by: Charlie Jenkins <charlie(a)rivosinc.com> Changes in v2: - Added much greater detail to cover letter - Removed all code that touched architecture specific code and was able to factor this out into all generic functions, except for flags that needed to be added to vm_unmapped_area_info - Made this an RFC since I have only tested it on riscv and x86 - Link to v1: https://lore.kernel.org/r/20240827-patches-below_hint_mmap-v1-0-46ff2eb9022… Changes in v3: - Use a personality flag instead of an mmap flag - Link to v2: https://lore.kernel.org/r/20240829-patches-below_hint_mmap-v2-0-638a28d9eae… --- Charlie Jenkins (2): mm: Add personality flag to limit address to 47 bits selftests/mm: Create ADDR_LIMIT_47BIT test include/uapi/linux/personality.h | 1 + mm/mmap.c | 3 ++ tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/map_47bit_personality.c | 34 ++++++++++++++++++++++ 5 files changed, 40 insertions(+) --- base-commit: 5be63fc19fcaa4c236b307420483578a56986a37 change-id: 20240827-patches-below_hint_mmap-b13d79ae1c55 -- - Charlie

9 months

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[PATCH v3 1/2] exec: fix up /proc/pid/comm in the execveat(AT_EMPTY_PATH) case

by Tycho Andersen

From: Tycho Andersen <tandersen(a)netflix.com> Zbigniew mentioned at Linux Plumber's that systemd is interested in switching to execveat() for service execution, but can't, because the contents of /proc/pid/comm are the file descriptor which was used, instead of the path to the binary. This makes the output of tools like top and ps useless, especially in a world where most fds are opened CLOEXEC so the number is truly meaningless. Change exec path to fix up /proc/pid/comm in the case where we have allocated one of these synthetic paths in bprm_init(). This way the actual exec machinery is unchanged, but cosmetically the comm looks reasonable to admins investigating things. Signed-off-by: Tycho Andersen <tandersen(a)netflix.com> Suggested-by: Zbigniew Jędrzejewski-Szmek <zbyszek(a)in.waw.pl> CC: Aleksa Sarai <cyphar(a)cyphar.com> Link: https://github.com/uapi-group/kernel-features#set-comm-field-before-exec --- v2: * drop the flag, everyone :) * change the rendered value to f_path.dentry->d_name.name instead of argv[0], Eric v3: * fix up subject line, Eric --- fs/exec.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/fs/exec.c b/fs/exec.c index dad402d55681..9520359a8dcc 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1416,7 +1416,18 @@ int begin_new_exec(struct linux_binprm * bprm) set_dumpable(current->mm, SUID_DUMP_USER); perf_event_exec(); - __set_task_comm(me, kbasename(bprm->filename), true); + + /* + * If fdpath was set, execveat() made up a path that will + * probably not be useful to admins running ps or similar. + * Let's fix it up to be something reasonable. + */ + if (bprm->fdpath) { + BUILD_BUG_ON(TASK_COMM_LEN > DNAME_INLINE_LEN); + __set_task_comm(me, bprm->file->f_path.dentry->d_name.name, true); + } else { + __set_task_comm(me, kbasename(bprm->filename), true); + } /* An exec changes our domain. We are no longer part of the thread group */ base-commit: baeb9a7d8b60b021d907127509c44507539c15e5 -- 2.34.1

9 months

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[PATCH RFC v4 0/9] tun: Introduce virtio-net hashing feature

by Akihiko Odaki

virtio-net have two usage of hashes: one is RSS and another is hash reporting. Conventionally the hash calculation was done by the VMM. However, computing the hash after the queue was chosen defeats the purpose of RSS. Another approach is to use eBPF steering program. This approach has another downside: it cannot report the calculated hash due to the restrictive nature of eBPF. Introduce the code to compute hashes to the kernel in order to overcome thse challenges. An alternative solution is to extend the eBPF steering program so that it will be able to report to the userspace, but it is based on context rewrites, which is in feature freeze. We can adopt kfuncs, but they will not be UAPIs. We opt to ioctl to align with other relevant UAPIs (KVM and vhost_net). The patches for QEMU to use this new feature was submitted as RFC and is available at: https://patchew.org/QEMU/20240915-hash-v3-0-79cb08d28647@daynix.com/ This work was presented at LPC 2024: https://lpc.events/event/18/contributions/1963/ V1 -> V2: Changed to introduce a new BPF program type. Signed-off-by: Akihiko Odaki <akihiko.odaki(a)daynix.com> --- Changes in v4: - Moved tun_vnet_hash_ext to if_tun.h. - Renamed virtio_net_toeplitz() to virtio_net_toeplitz_calc(). - Replaced htons() with cpu_to_be16(). - Changed virtio_net_hash_rss() to return void. - Reordered variable declarations in virtio_net_hash_rss(). - Removed virtio_net_hdr_v1_hash_from_skb(). - Updated messages of "tap: Pad virtio header with zero" and "tun: Pad virtio header with zero". - Fixed vnet_hash allocation size. - Ensured to free vnet_hash when destructing tun_struct. - Link to v3: https://lore.kernel.org/r/20240915-rss-v3-0-c630015db082@daynix.com Changes in v3: - Reverted back to add ioctl. - Split patch "tun: Introduce virtio-net hashing feature" into "tun: Introduce virtio-net hash reporting feature" and "tun: Introduce virtio-net RSS". - Changed to reuse hash values computed for automq instead of performing RSS hashing when hash reporting is requested but RSS is not. - Extracted relevant data from struct tun_struct to keep it minimal. - Added kernel-doc. - Changed to allow calling TUNGETVNETHASHCAP before TUNSETIFF. - Initialized num_buffers with 1. - Added a test case for unclassified packets. - Fixed error handling in tests. - Changed tests to verify that the queue index will not overflow. - Rebased. - Link to v2: https://lore.kernel.org/r/20231015141644.260646-1-akihiko.odaki@daynix.com --- Akihiko Odaki (9): skbuff: Introduce SKB_EXT_TUN_VNET_HASH virtio_net: Add functions for hashing net: flow_dissector: Export flow_keys_dissector_symmetric tap: Pad virtio header with zero tun: Pad virtio header with zero tun: Introduce virtio-net hash reporting feature tun: Introduce virtio-net RSS selftest: tun: Add tests for virtio-net hashing vhost/net: Support VIRTIO_NET_F_HASH_REPORT Documentation/networking/tuntap.rst | 7 + drivers/net/Kconfig | 1 + drivers/net/tap.c | 2 +- drivers/net/tun.c | 255 ++++++++++++-- drivers/vhost/net.c | 16 +- include/linux/if_tun.h | 5 + include/linux/skbuff.h | 3 + include/linux/virtio_net.h | 174 +++++++++ include/net/flow_dissector.h | 1 + include/uapi/linux/if_tun.h | 71 ++++ net/core/flow_dissector.c | 3 +- net/core/skbuff.c | 4 + tools/testing/selftests/net/Makefile | 2 +- tools/testing/selftests/net/tun.c | 666 ++++++++++++++++++++++++++++++++++- 14 files changed, 1170 insertions(+), 40 deletions(-) --- base-commit: 752ebcbe87aceeb6334e846a466116197711a982 change-id: 20240403-rss-e737d89efa77 Best regards, -- Akihiko Odaki <akihiko.odaki(a)daynix.com>

9 months

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[PATCH bpf-next v3 0/2] Support eliding map lookup nullness

by Daniel Xu

This patch allows progs to elide a null check on statically known map lookup keys. In other words, if the verifier can statically prove that the lookup will be in-bounds, allow the prog to drop the null check. This is useful for two reasons: 1. Large numbers of nullness checks (especially when they cannot fail) unnecessarily pushes prog towards BPF_COMPLEXITY_LIMIT_JMP_SEQ. 2. It forms a tighter contract between programmer and verifier. For (1), bpftrace is starting to make heavier use of percpu scratch maps. As a result, for user scripts with large number of unrolled loops, we are starting to hit jump complexity verification errors. These percpu lookups cannot fail anyways, as we only use static key values. Eliding nullness probably results in less work for verifier as well. For (2), percpu scratch maps are often used as a larger stack, as the currrent stack is limited to 512 bytes. In these situations, it is desirable for the programmer to express: "this lookup should never fail, and if it does, it means I messed up the code". By omitting the null check, the programmer can "ask" the verifier to double check the logic. Changes in v3: * Check if stack is (erroneously) growing upwards * Mention in commit message why existing tests needed change Changes in v2: * Added a check for when R2 is not a ptr to stack * Added a check for when stack is uninitialized (no stack slot yet) * Updated existing tests to account for null elision * Added test case for when R2 can be both const and non-const Daniel Xu (2): bpf: verifier: Support eliding map lookup nullness bpf: selftests: verifier: Add nullness elision tests kernel/bpf/verifier.c | 67 ++++++- tools/testing/selftests/bpf/progs/iters.c | 14 +- .../selftests/bpf/progs/map_kptr_fail.c | 2 +- .../bpf/progs/verifier_array_access.c | 166 ++++++++++++++++++ .../selftests/bpf/progs/verifier_map_in_map.c | 2 +- .../testing/selftests/bpf/verifier/map_kptr.c | 2 +- 6 files changed, 242 insertions(+), 11 deletions(-) -- 2.46.0

9 months

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kselftest/fixes build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc1-7-g160c826b4dd0d)

by kernelci.org bot

kselftest/fixes build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc1-7-g160c826b4dd0d) Full Build Summary: https://kernelci.org/build/kselftest/branch/fixes/kernel/v6.12-rc1-7-g160c8… Tree: kselftest Branch: fixes Git Describe: v6.12-rc1-7-g160c826b4dd0d Git Commit: 160c826b4dd0d570f0f51cf002cb49bda807e9f5 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches --- For more info write to <info(a)kernelci.org>

9 months

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[PATCH v3 0/2] Exposing nice CPU usage to userspace

by Joshua Hahn

From: Joshua Hahn <joshua.hahn6(a)gmail.com> v2 -> v3: Signed-off-by & renamed subject for clarity. v1 -> v2: Edited commit messages for clarity. Niced CPU usage is a metric reported in host-level /prot/stat, but is not reported in cgroup-level statistics in cpu.stat. However, when a host contains multiple tasks across different workloads, it becomes difficult to gauge how much of the task is being spent on niced processes based on /proc/stat alone, since host-level metrics do not provide this cgroup-level granularity. Exposing this metric will allow users to accurately probe the niced CPU metric for each workload, and make more informed decisions when directing higher priority tasks. Joshua Hahn (2): Tracking cgroup-level niced CPU time Selftests for niced CPU statistics include/linux/cgroup-defs.h | 1 + kernel/cgroup/rstat.c | 16 ++++- tools/testing/selftests/cgroup/test_cpu.c | 72 +++++++++++++++++++++++ 3 files changed, 86 insertions(+), 3 deletions(-) -- 2.43.5

9 months

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[PATCH] KVM: selftests: Fix build on architectures other than x86_64

by Mark Brown

The recent addition of support for testing with the x86 specific quirk KVM_X86_QUIRK_SLOT_ZAP_ALL disabled in the generic memslot tests broke the build of the KVM selftests for all other architectures: In file included from include/kvm_util.h:8, from include/memstress.h:13, from memslot_modification_stress_test.c:21: memslot_modification_stress_test.c: In function ‘main’: memslot_modification_stress_test.c:176:38: error: ‘KVM_X86_QUIRK_SLOT_ZAP_ALL’ undeclared (first use in this function) 176 | KVM_X86_QUIRK_SLOT_ZAP_ALL); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ Add __x86_64__ guard defines to avoid building the relevant code on other architectures. Fixes: 61de4c34b51c ("KVM: selftests: Test memslot move in memslot_perf_test with quirk disabled") Fixes: 218f6415004a ("KVM: selftests: Allow slot modification stress test with quirk disabled") Reported-by: Aishwarya TCV <aishwarya.tcv(a)arm.com> Signed-off-by: Mark Brown <broonie(a)kernel.org> --- This is obviously disruptive for testing of KVM changes on non-x86 architectures. --- tools/testing/selftests/kvm/memslot_modification_stress_test.c | 2 ++ tools/testing/selftests/kvm/memslot_perf_test.c | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c index e3343f0df9e1..c81a84990eab 100644 --- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c +++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c @@ -169,12 +169,14 @@ int main(int argc, char *argv[]) case 'i': p.nr_iterations = atoi_positive("Number of iterations", optarg); break; +#ifdef __x86_64__ case 'q': p.disable_slot_zap_quirk = true; TEST_REQUIRE(kvm_check_cap(KVM_CAP_DISABLE_QUIRKS2) & KVM_X86_QUIRK_SLOT_ZAP_ALL); break; +#endif case 'h': default: help(argv[0]); diff --git a/tools/testing/selftests/kvm/memslot_perf_test.c b/tools/testing/selftests/kvm/memslot_perf_test.c index 893366982f77..989ffe0d047f 100644 --- a/tools/testing/selftests/kvm/memslot_perf_test.c +++ b/tools/testing/selftests/kvm/memslot_perf_test.c @@ -113,7 +113,9 @@ static_assert(ATOMIC_BOOL_LOCK_FREE == 2, "atomic bool is not lockless"); static sem_t vcpu_ready; static bool map_unmap_verify; +#ifdef __x86_64__ static bool disable_slot_zap_quirk; +#endif static bool verbose; #define pr_info_v(...) \ @@ -579,8 +581,10 @@ static bool test_memslot_move_prepare(struct vm_data *data, uint32_t guest_page_size = data->vm->page_size; uint64_t movesrcgpa, movetestgpa; +#ifdef __x86_64__ if (disable_slot_zap_quirk) vm_enable_cap(data->vm, KVM_CAP_DISABLE_QUIRKS2, KVM_X86_QUIRK_SLOT_ZAP_ALL); +#endif movesrcgpa = vm_slot2gpa(data, data->nslots - 1); @@ -971,11 +975,13 @@ static bool parse_args(int argc, char *argv[], case 'd': map_unmap_verify = true; break; +#ifdef __x86_64__ case 'q': disable_slot_zap_quirk = true; TEST_REQUIRE(kvm_check_cap(KVM_CAP_DISABLE_QUIRKS2) & KVM_X86_QUIRK_SLOT_ZAP_ALL); break; +#endif case 's': targs->nslots = atoi_paranoid(optarg); if (targs->nslots <= 1 && targs->nslots != -1) { --- base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc change-id: 20240930-kvm-build-breakage-a542f46d78f9 Best regards, -- Mark Brown <broonie(a)kernel.org>

9 months

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[PATCH] selftest: hid: add missing run-hid-tools-tests.sh

by Yun Lu

The HID test cases actually run tests using the run-hid-tools-tests.sh script. However, if installed with "make install", the run-hid-tools-tests.sh script will not be copied over, resulting in the following error message. make -C tools/testing/selftests/ TARGETS=hid install \ INSTALL_PATH=$KSFT_INSTALL_PATH cd $KSFT_INSTALL_PATH ./run_kselftest.sh -c hid selftests: hid: hid-core.sh bash: ./run-hid-tools-tests.sh: No such file or directory So add the run-hid-tools-tests.sh script to the TEST_FILES in the Makefile. Signed-off-by: Yun Lu <luyun(a)kylinos.cn> --- tools/testing/selftests/hid/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile index 72be55ac4bdf..38ae31bb07b5 100644 --- a/tools/testing/selftests/hid/Makefile +++ b/tools/testing/selftests/hid/Makefile @@ -17,6 +17,8 @@ TEST_PROGS += hid-tablet.sh TEST_PROGS += hid-usb_crash.sh TEST_PROGS += hid-wacom.sh +TEST_FILES := run-hid-tools-tests.sh + CXX ?= $(CROSS_COMPILE)g++ HOSTPKG_CONFIG := pkg-config -- 2.27.0

9 months

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[PATCH] selftests: vDSO: align getrandom states to cache line

by Jason A. Donenfeld

This prevents false sharing, which makes a large difference on machines with several NUMA nodes, such as on a dual socket Intel(R) Xeon(R) Gold 6338 CPU @ 2.00GHz, where the "bench-multi" test goes from 2.7s down to 1.9s. While this is just test code, it also forms the basis of how folks will wind up implementing this in libraries, so we should implement this simple cache alignment improvement here. Suggested-by: Florian Weimer <fweimer(a)redhat.com> Cc: Adhemerval Zanella <adhemerval.zanella(a)linaro.org> Signed-off-by: Jason A. Donenfeld <Jason(a)zx2c4.com> --- tools/testing/selftests/vDSO/vdso_test_getrandom.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/vDSO/vdso_test_getrandom.c b/tools/testing/selftests/vDSO/vdso_test_getrandom.c index 72a1d9b43a84..e5e83dbec589 100644 --- a/tools/testing/selftests/vDSO/vdso_test_getrandom.c +++ b/tools/testing/selftests/vDSO/vdso_test_getrandom.c @@ -59,10 +59,12 @@ static void *vgetrandom_get_state(void) size_t page_size = getpagesize(); size_t new_cap; size_t alloc_size, num = sysconf(_SC_NPROCESSORS_ONLN); /* Just a decent heuristic. */ + size_t state_size_aligned, cache_line_size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE) ?: 1; void *new_block, *new_states; - alloc_size = (num * vgrnd.params.size_of_opaque_state + page_size - 1) & (~(page_size - 1)); - num = (page_size / vgrnd.params.size_of_opaque_state) * (alloc_size / page_size); + state_size_aligned = (vgrnd.params.size_of_opaque_state + cache_line_size - 1) & (~(cache_line_size - 1)); + alloc_size = (num * state_size_aligned + page_size - 1) & (~(page_size - 1)); + num = (page_size / state_size_aligned) * (alloc_size / page_size); new_block = mmap(0, alloc_size, vgrnd.params.mmap_prot, vgrnd.params.mmap_flags, -1, 0); if (new_block == MAP_FAILED) goto out; @@ -78,7 +80,7 @@ static void *vgetrandom_get_state(void) if (((uintptr_t)new_block & (page_size - 1)) + vgrnd.params.size_of_opaque_state > page_size) new_block = (void *)(((uintptr_t)new_block + page_size - 1) & (~(page_size - 1))); vgrnd.states[i] = new_block; - new_block += vgrnd.params.size_of_opaque_state; + new_block += state_size_aligned; } vgrnd.len = num; goto success; -- 2.46.0

9 months

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[RFC PATCH 0/3] introduce PIDFD_SELF

by Lorenzo Stoakes

If you wish to utilise a pidfd interface to refer to the current process (from the point of view of userland - from the kernel point of view - the thread group leader), it is rather cumbersome, requiring something like: int pidfd = pidfd_open(getpid(), 0); ... close(pidfd); Or the equivalent call opening /proc/self. It is more convenient to use a sentinel value to indicate to an interface that accepts a pidfd that we simply wish to refer to the current process. This series introduces such a sentinel, PIDFD_SELF, which can be passed as the pidfd in this instance rather than having to establish a dummy fd for this purpose. The only pidfd interface where this is particularly useful is process_madvise(), which provides the motivation for this series. However, as this is a general interface, we ensure that all pidfd interfaces can handle this correctly. We ensure that pidfd_send_signal() and pidfd_getfd() work correctly, and assert as much in selftests. All other interfaces except setns() will work implicitly with this new interface, however it doesn't make sense to test waitid(P_PIDFD, ...) as waiting on ourselves is a blocking operation. In the case of setns() we explicitly disallow use of PIDFD_SELF as it doesn't make sense to obtain the namespaces of our own process, and it would require work to implement this functionality there that would be of no use. We also do not provide the ability to utilise PIDFD_SELF in ordinary fd operations such as open() or poll(), as this would require extensive work and be of no real use. Lorenzo Stoakes (3): pidfd: refactor pidfd_get_pid/to_pid() and de-duplicate pid lookup pidfd: add PIDFD_SELF sentinel to refer to own process selftests: pidfd: add tests for PIDFD_SELF include/linux/pid.h | 43 +++++++++++- include/uapi/linux/pidfd.h | 3 + kernel/exit.c | 3 +- kernel/nsproxy.c | 1 + kernel/pid.c | 70 +++++++++++++------ kernel/signal.c | 26 ++----- tools/testing/selftests/pidfd/pidfd.h | 5 ++ .../selftests/pidfd/pidfd_getfd_test.c | 38 ++++++++++ .../selftests/pidfd/pidfd_setns_test.c | 6 ++ tools/testing/selftests/pidfd/pidfd_test.c | 13 ++++ 10 files changed, 165 insertions(+), 43 deletions(-) -- 2.46.2

9 months

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Re: [PATCH v2 1/2] exec: add a flag for "reasonable" execveat() comm

by Eric W. Biederman

"Eric W. Biederman" <ebiederm(a)xmission.com> writes: > Kees Cook <kees(a)kernel.org> writes: >> I'm not super comfortable doing this regardless of bprm->fdpath; that >> seems like too many cases getting changed. Can we just leave it as >> depending on bprm->fdpath? I was recommending that because I did not expect that there was any widespread usage of aliasing of binary names using symlinks. I realized today that on debian there are many aliases of binaries created with the /etc/alternatives mechanism. So there is much wider exposure to problems than I would have supposed. So I remove any objections to making the new code conditional on bprm->fdpath. Eric

9 months

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[PATCH net v4] selftests: net: no_forwarding: fix VID for $swp2 in one_bridge_two_pvids() test

by Kacper Ludwinski

Currently, the second bridge command overwrites the first one. Fix this by adding this VID to the interface behind $swp2. The one_bridge_two_pvids() test intends to check that there is no leakage of traffic between bridge ports which have a single VLAN - the PVID VLAN. Because of a typo, port $swp1 is configured with a PVID twice (second command overwrites first), and $swp2 isn't configured at all (and since the bridge vlan_default_pvid property is set to 0, this port will not have a PVID at all, so it will drop all untagged and priority-tagged traffic). So, instead of testing the configuration that was intended, we are testing a different one, where one port has PVID 2 and the other has no PVID. This incorrect version of the test should also pass, but is ineffective for its purpose, so fix the typo. This typo has an impact on results of the test results, potentially leading to wrong conclusions regarding the functionality of a network device. Fixes: 476a4f05d9b8 ("selftests: forwarding: add a no_forwarding.sh test") Reviewed-by: Hangbin Liu <liuhangbin(a)gmail.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Kacper Ludwinski <kac.ludwinski(a)icloud.com> --- tools/testing/selftests/net/forwarding/no_forwarding.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) v4: - Add revision history od this patch - Add "Reviewed-by:" - Limit number of characters in commit to 80 - Add impact explanation to commit message v3: - Edit commit message - Add missing Signed-off-by - Link: https://lore.kernel.org/linux-kselftest/20240927112824.339-1-kac.ludwinski@… v2: - Add missing CCs - Fix typo in commit message - Add target name - Link: https://lore.kernel.org/linux-kselftest/fQknN_r6POzmrp8UVjyA3cknLnB1HB9I_jf… v1: - Link: https://lore.kernel.org/linux-kselftest/20240925050539.1906-1-kacper@ludwin… diff --git a/tools/testing/selftests/net/forwarding/no_forwarding.sh b/tools/testing/selftests/net/forwarding/no_forwarding.sh index 9e677aa64a06..694ece9ba3a7 100755 --- a/tools/testing/selftests/net/forwarding/no_forwarding.sh +++ b/tools/testing/selftests/net/forwarding/no_forwarding.sh @@ -202,7 +202,7 @@ one_bridge_two_pvids() ip link set $swp2 master br0 bridge vlan add dev $swp1 vid 1 pvid untagged - bridge vlan add dev $swp1 vid 2 pvid untagged + bridge vlan add dev $swp2 vid 2 pvid untagged run_test "Switch ports in VLAN-aware bridge with different PVIDs" -- 2.43.0

9 months

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[PATCH v1 0/2] selftests/mm: hugetlb_fault_after_madv improvements

by David Hildenbrand

Mario brought to my attention that the hugetlb_fault_after_madv test is currently always skipped on s390x. Let's adjust the test to be independent of the default hugetlb page size and while at it, also improve the test output. Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Mario Casquero <mcasquer(a)redhat.com> Cc: Breno Leitao <leitao(a)debian.org> David Hildenbrand (2): selftests/mm: hugetlb_fault_after_madv: use default hguetlb page size selftests/mm: hugetlb_fault_after_madv: improve test output .../selftests/mm/hugetlb_fault_after_madv.c | 48 ++++++++++++++++--- 1 file changed, 42 insertions(+), 6 deletions(-) -- 2.46.1

9 months

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[PATCH v2] selftests/proc: Add test to check unmapped process

by Siddharth Menon

Introduce test 'test_proc_pid_mem' to address the issue in the TODO. Check if VMsize is 0 to determine whether the process has been unmapped. The child process cannot signal the parent that it has unmapped itself, as it no longer exists. This includes unmapping the text segment, preventing the child from proceeding to the next instruction. Signed-off-by: Siddharth Menon <simeddon(a)gmail.com> --- v1->v2: Removed redundant parenthesis, fixed other checkpatch warnings. Revised commit message based on feedback. tools/testing/selftests/proc/proc-empty-vm.c | 56 +++++++++++++++++--- 1 file changed, 50 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/proc/proc-empty-vm.c b/tools/testing/selftests/proc/proc-empty-vm.c index b3f898aab4ab..bfb7f8823529 100644 --- a/tools/testing/selftests/proc/proc-empty-vm.c +++ b/tools/testing/selftests/proc/proc-empty-vm.c @@ -213,6 +213,53 @@ static void vsyscall(void) } #endif +static int test_proc_pid_mem(pid_t pid) +{ + char buf[4096]; + char *line; + int vm_size = -1; + + snprintf(buf, sizeof(buf), "/proc/%d/status", pid); + int fd = open(buf, O_RDONLY); + + if (fd == -1) { + if (errno == ENOENT) + /* Process does not exist */ + return EXIT_SUCCESS; + + perror("open /proc/[pid]/status"); + return EXIT_FAILURE; + } + + ssize_t rv = read(fd, buf, sizeof(buf) - 1); + + if (rv == -1) { + perror("read"); + close(fd); + return EXIT_FAILURE; + } + buf[rv] = '\0'; + + line = strtok(buf, "\n"); + while (line != NULL) { + /* Check for VmSize */ + if (strncmp(line, "VmSize:", 7) == 0) { + if (sscanf(line, "VmSize: %d", &vm_size) == 1) + break; + perror("Failed to parse VmSize.\n"); + } + line = strtok(NULL, "\n"); + } + + close(fd); + + /* Check if VmSize is 0 */ + if (vm_size == 0) + return EXIT_SUCCESS; + + return EXIT_FAILURE; +} + static int test_proc_pid_maps(pid_t pid) { char buf[4096]; @@ -500,14 +547,11 @@ int main(void) #endif return EXIT_FAILURE; } else { - /* - * TODO find reliable way to signal parent that munmap(2) completed. - * Child can't do it directly because it effectively doesn't exist - * anymore. Looking at child's VM files isn't 100% reliable either: - * due to a bug they may not become empty or empty-like. - */ sleep(1); + if (rv == EXIT_SUCCESS) + rv = test_proc_pid_mem(pid); + if (rv == EXIT_SUCCESS) { rv = test_proc_pid_maps(pid); } -- 2.39.5

9 months

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[PATCH net-next v19 11/14] mm: page_frag: add testing for the newly added prepare API

by Yunsheng Lin

Add testing for the newly added prepare API, for both aligned and non-aligned API, also probe API is also tested along with prepare API. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- .../selftests/mm/page_frag/page_frag_test.c | 66 +++++++++++++++++-- tools/testing/selftests/mm/run_vmtests.sh | 4 ++ tools/testing/selftests/mm/test_page_frag.sh | 31 +++++++++ 3 files changed, 96 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 36543a129e40..567bcc6a181e 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -29,6 +29,10 @@ static bool test_align; module_param(test_align, bool, 0); MODULE_PARM_DESC(test_align, "use align API for testing"); +static bool test_prepare; +module_param(test_prepare, bool, 0); +MODULE_PARM_DESC(test_prepare, "use prepare API for testing"); + static int test_alloc_len = 2048; module_param(test_alloc_len, int, 0); MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); @@ -68,6 +72,18 @@ static int page_frag_pop_thread(void *arg) return 0; } +static void frag_frag_test_commit(struct page_frag_cache *nc, + struct page_frag *prepare_pfrag, + struct page_frag *probe_pfrag, + unsigned int used_sz) +{ + WARN_ON_ONCE(prepare_pfrag->page != probe_pfrag->page || + prepare_pfrag->offset != probe_pfrag->offset || + prepare_pfrag->size != probe_pfrag->size); + + page_frag_commit(nc, prepare_pfrag, used_sz); +} + static int page_frag_push_thread(void *arg) { struct ptr_ring *ring = arg; @@ -80,13 +96,52 @@ static int page_frag_push_thread(void *arg) int ret; if (test_align) { - va = page_frag_alloc_align(&test_nc, test_alloc_len, - GFP_KERNEL, SMP_CACHE_BYTES); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare_align(&test_nc, + test_alloc_len, + &prepare_frag, + GFP_KERNEL, + SMP_CACHE_BYTES); + + probe_va = __page_frag_alloc_refill_probe_align(&test_nc, + test_alloc_len, + &probe_frag, + -SMP_CACHE_BYTES); + WARN_ON_ONCE(va != probe_va); + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc_align(&test_nc, + test_alloc_len, + GFP_KERNEL, + SMP_CACHE_BYTES); + } WARN_ONCE((unsigned long)va & (SMP_CACHE_BYTES - 1), "unaligned va returned\n"); } else { - va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare(&test_nc, test_alloc_len, + &prepare_frag, GFP_KERNEL); + + probe_va = page_frag_alloc_refill_probe(&test_nc, test_alloc_len, + &probe_frag); + + WARN_ON_ONCE(va != probe_va); + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } } if (!va) @@ -152,8 +207,9 @@ static int __init page_frag_test_init(void) test_pushed, test_popped); duration = (u64)ktime_us_delta(ktime_get(), start); - pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, - test_align ? "aligned" : "non-aligned", duration); + pr_info("%d of iterations for %s %s API testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", + test_prepare ? "prepare" : "alloc", duration); ptr_ring_cleanup(&ptr_ring, NULL); page_frag_cache_drain(&test_nc); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 2c5394584af4..f6ff9080a6f2 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -464,6 +464,10 @@ CATEGORY="page_frag" run_test ./test_page_frag.sh aligned CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned_prepare + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned_prepare + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh index d750d910c899..71c3531fa38e 100755 --- a/tools/testing/selftests/mm/test_page_frag.sh +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -36,6 +36,8 @@ ksft_skip=4 SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" +NONALIGNED_PREPARE_PARAM="$NONALIGNED_PARAM test_prepare=1" +ALIGNED_PREPARE_PARAM="$ALIGNED_PARAM test_prepare=1" check_test_requirements() { @@ -74,6 +76,24 @@ run_aligned_check() echo "Check the kernel ring buffer to see the summary." } +run_nonaligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast nonaligned prepare API is." + + insmod $DRIVER $NONALIGNED_PREPARE_PARAM > /dev/null 2>&1 + echo "Done." + echo "Ccheck the kernel ring buffer to see the summary." +} + +run_aligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast aligned prepare API is." + + insmod $DRIVER $ALIGNED_PREPARE_PARAM > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + run_smoke_check() { echo "Run smoke test." @@ -86,6 +106,7 @@ run_smoke_check() usage() { echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "[ aligned_prepare ] | [ nonaligned_prepare ] | " echo "manual parameters" echo echo "Valid tests and parameters:" @@ -106,6 +127,12 @@ usage() echo "# Performance testing for aligned alloc API" echo "$0 aligned" echo + echo "# Performance testing for nonaligned prepare API" + echo "$0 nonaligned_prepare" + echo + echo "# Performance testing for aligned prepare API" + echo "$0 aligned_prepare" + echo exit 0 } @@ -159,6 +186,10 @@ function run_test() run_nonaligned_check elif [[ "$1" = "aligned" ]]; then run_aligned_check + elif [[ "$1" = "nonaligned_prepare" ]]; then + run_nonaligned_prepare_check + elif [[ "$1" = "aligned_prepare" ]]; then + run_aligned_prepare_check else run_manual_check $@ fi -- 2.34.1

9 months

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[PATCH net-next v19 04/14] mm: page_frag: avoid caller accessing 'page_frag_cache' directly

by Yunsheng Lin

Use appropriate frag_page API instead of caller accessing 'page_frag_cache' directly. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> Acked-by: Chuck Lever <chuck.lever(a)oracle.com> --- drivers/vhost/net.c | 2 +- include/linux/page_frag_cache.h | 10 ++++++++++ net/core/skbuff.c | 6 +++--- net/rxrpc/conn_object.c | 4 +--- net/rxrpc/local_object.c | 4 +--- net/sunrpc/svcsock.c | 6 ++---- tools/testing/selftests/mm/page_frag/page_frag_test.c | 2 +- 7 files changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index f16279351db5..9ad37c012189 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1325,7 +1325,7 @@ static int vhost_net_open(struct inode *inode, struct file *f) vqs[VHOST_NET_VQ_RX]); f->private_data = n; - n->pf_cache.va = NULL; + page_frag_cache_init(&n->pf_cache); return 0; } diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h index 67ac8626ed9b..0a52f7a179c8 100644 --- a/include/linux/page_frag_cache.h +++ b/include/linux/page_frag_cache.h @@ -7,6 +7,16 @@ #include <linux/mm_types_task.h> #include <linux/types.h> +static inline void page_frag_cache_init(struct page_frag_cache *nc) +{ + nc->va = NULL; +} + +static inline bool page_frag_cache_is_pfmemalloc(struct page_frag_cache *nc) +{ + return !!nc->pfmemalloc; +} + void page_frag_cache_drain(struct page_frag_cache *nc); void __page_frag_cache_drain(struct page *page, unsigned int count); void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 74149dc4ee31..ca01880c7ad0 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -753,14 +753,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (in_hardirq() || irqs_disabled()) { nc = this_cpu_ptr(&netdev_alloc_cache); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); } else { local_bh_disable(); local_lock_nested_bh(&napi_alloc_cache.bh_lock); nc = this_cpu_ptr(&napi_alloc_cache.page); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); local_unlock_nested_bh(&napi_alloc_cache.bh_lock); local_bh_enable(); @@ -850,7 +850,7 @@ struct sk_buff *napi_alloc_skb(struct napi_struct *napi, unsigned int len) len = SKB_HEAD_ALIGN(len); data = page_frag_alloc(&nc->page, len, gfp_mask); - pfmemalloc = nc->page.pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(&nc->page); } local_unlock_nested_bh(&napi_alloc_cache.bh_lock); diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 1539d315afe7..694c4df7a1a3 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -337,9 +337,7 @@ static void rxrpc_clean_up_connection(struct work_struct *work) */ rxrpc_purge_queue(&conn->rx_queue); - if (conn->tx_data_alloc.va) - __page_frag_cache_drain(virt_to_page(conn->tx_data_alloc.va), - conn->tx_data_alloc.pagecnt_bias); + page_frag_cache_drain(&conn->tx_data_alloc); call_rcu(&conn->rcu, rxrpc_rcu_free_connection); } diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index 504453c688d7..a8cffe47cf01 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -452,9 +452,7 @@ void rxrpc_destroy_local(struct rxrpc_local *local) #endif rxrpc_purge_queue(&local->rx_queue); rxrpc_purge_client_connections(local); - if (local->tx_alloc.va) - __page_frag_cache_drain(virt_to_page(local->tx_alloc.va), - local->tx_alloc.pagecnt_bias); + page_frag_cache_drain(&local->tx_alloc); } /* diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 825ec5357691..b785425c3315 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1608,7 +1608,6 @@ static void svc_tcp_sock_detach(struct svc_xprt *xprt) static void svc_sock_free(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct page_frag_cache *pfc = &svsk->sk_frag_cache; struct socket *sock = svsk->sk_sock; trace_svcsock_free(svsk, sock); @@ -1618,8 +1617,7 @@ static void svc_sock_free(struct svc_xprt *xprt) sockfd_put(sock); else sock_release(sock); - if (pfc->va) - __page_frag_cache_drain(virt_to_head_page(pfc->va), - pfc->pagecnt_bias); + + page_frag_cache_drain(&svsk->sk_frag_cache); kfree(svsk); } diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index fdf204550c9a..36543a129e40 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -117,7 +117,7 @@ static int __init page_frag_test_init(void) u64 duration; int ret; - test_nc.va = NULL; + page_frag_cache_init(&test_nc); atomic_set(&nthreads, 2); init_completion(&wait); -- 2.34.1

9 months

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[PATCH net-next v19 02/14] mm: move the page fragment allocator from page_alloc into its own file

by Yunsheng Lin

Inspired by [1], move the page fragment allocator from page_alloc into its own c file and header file, as we are about to make more change for it to replace another page_frag implementation in sock.c As this patchset is going to replace 'struct page_frag' with 'struct page_frag_cache' in sched.h, including page_frag_cache.h in sched.h has a compiler error caused by interdependence between mm_types.h and mm.h for asm-offsets.c, see [2]. So avoid the compiler error by moving 'struct page_frag_cache' to mm_types_task.h as suggested by Alexander, see [3]. 1. https://lore.kernel.org/all/20230411160902.4134381-3-dhowells@redhat.com/ 2. https://lore.kernel.org/all/15623dac-9358-4597-b3ee-3694a5956920@gmail.com/ 3. https://lore.kernel.org/all/CAKgT0UdH1yD=LSCXFJ=YM_aiA4OomD-2wXykO42bizaWMt… CC: David Howells <dhowells(a)redhat.com> CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Acked-by: Andrew Morton <akpm(a)linux-foundation.org> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- include/linux/gfp.h | 22 --- include/linux/mm_types.h | 18 --- include/linux/mm_types_task.h | 18 +++ include/linux/page_frag_cache.h | 31 ++++ include/linux/skbuff.h | 1 + mm/Makefile | 1 + mm/page_alloc.c | 136 ---------------- mm/page_frag_cache.c | 145 ++++++++++++++++++ .../selftests/mm/page_frag/page_frag_test.c | 2 +- 9 files changed, 197 insertions(+), 177 deletions(-) create mode 100644 include/linux/page_frag_cache.h create mode 100644 mm/page_frag_cache.c diff --git a/include/linux/gfp.h b/include/linux/gfp.h index a951de920e20..a0a6d25f883f 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -371,28 +371,6 @@ __meminit void *alloc_pages_exact_nid_noprof(int nid, size_t size, gfp_t gfp_mas extern void __free_pages(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order); -struct page_frag_cache; -void page_frag_cache_drain(struct page_frag_cache *nc); -extern void __page_frag_cache_drain(struct page *page, unsigned int count); -void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, - gfp_t gfp_mask, unsigned int align_mask); - -static inline void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align) -{ - WARN_ON_ONCE(!is_power_of_2(align)); - return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); -} - -static inline void *page_frag_alloc(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask) -{ - return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); -} - -extern void page_frag_free(void *addr); - #define __free_page(page) __free_pages((page), 0) #define free_page(addr) free_pages((addr), 0) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 6e3bdf8e38bc..92314ef2d978 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -521,9 +521,6 @@ static_assert(sizeof(struct ptdesc) <= sizeof(struct page)); */ #define STRUCT_PAGE_MAX_SHIFT (order_base_2(sizeof(struct page))) -#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) -#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) - /* * page_private can be used on tail pages. However, PagePrivate is only * checked by the VM on the head page. So page_private on the tail pages @@ -542,21 +539,6 @@ static inline void *folio_get_private(struct folio *folio) return folio->private; } -struct page_frag_cache { - void * va; -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - __u16 offset; - __u16 size; -#else - __u32 offset; -#endif - /* we maintain a pagecount bias, so that we dont dirty cache line - * containing page->_refcount every time we allocate a fragment. - */ - unsigned int pagecnt_bias; - bool pfmemalloc; -}; - typedef unsigned long vm_flags_t; /* diff --git a/include/linux/mm_types_task.h b/include/linux/mm_types_task.h index bff5706b76e1..0ac6daebdd5c 100644 --- a/include/linux/mm_types_task.h +++ b/include/linux/mm_types_task.h @@ -8,6 +8,7 @@ * (These are defined separately to decouple sched.h from mm_types.h as much as possible.) */ +#include <linux/align.h> #include <linux/types.h> #include <asm/page.h> @@ -43,6 +44,23 @@ struct page_frag { #endif }; +#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) +#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) +struct page_frag_cache { + void *va; +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + __u16 offset; + __u16 size; +#else + __u32 offset; +#endif + /* we maintain a pagecount bias, so that we dont dirty cache line + * containing page->_refcount every time we allocate a fragment. + */ + unsigned int pagecnt_bias; + bool pfmemalloc; +}; + /* Track pages that require TLB flushes */ struct tlbflush_unmap_batch { #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h new file mode 100644 index 000000000000..67ac8626ed9b --- /dev/null +++ b/include/linux/page_frag_cache.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_PAGE_FRAG_CACHE_H +#define _LINUX_PAGE_FRAG_CACHE_H + +#include <linux/log2.h> +#include <linux/mm_types_task.h> +#include <linux/types.h> + +void page_frag_cache_drain(struct page_frag_cache *nc); +void __page_frag_cache_drain(struct page *page, unsigned int count); +void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, + gfp_t gfp_mask, unsigned int align_mask); + +static inline void *page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align) +{ + WARN_ON_ONCE(!is_power_of_2(align)); + return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); +} + +static inline void *page_frag_alloc(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask) +{ + return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); +} + +void page_frag_free(void *addr); + +#endif diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 39f1d16f3628..560e2b49f98b 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -31,6 +31,7 @@ #include <linux/in6.h> #include <linux/if_packet.h> #include <linux/llist.h> +#include <linux/page_frag_cache.h> #include <net/flow.h> #if IS_ENABLED(CONFIG_NF_CONNTRACK) #include <linux/netfilter/nf_conntrack_common.h> diff --git a/mm/Makefile b/mm/Makefile index d5639b036166..dba52bb0da8a 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -65,6 +65,7 @@ page-alloc-$(CONFIG_SHUFFLE_PAGE_ALLOCATOR) += shuffle.o memory-hotplug-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o obj-y += page-alloc.o +obj-y += page_frag_cache.o obj-y += init-mm.o obj-y += memblock.o obj-y += $(memory-hotplug-y) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8afab64814dc..6ca2abce857b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4836,142 +4836,6 @@ void free_pages(unsigned long addr, unsigned int order) EXPORT_SYMBOL(free_pages); -/* - * Page Fragment: - * An arbitrary-length arbitrary-offset area of memory which resides - * within a 0 or higher order page. Multiple fragments within that page - * are individually refcounted, in the page's reference counter. - * - * The page_frag functions below provide a simple allocation framework for - * page fragments. This is used by the network stack and network device - * drivers to provide a backing region of memory for use as either an - * sk_buff->head, or to be used in the "frags" portion of skb_shared_info. - */ -static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, - gfp_t gfp_mask) -{ - struct page *page = NULL; - gfp_t gfp = gfp_mask; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | - __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; - page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, - PAGE_FRAG_CACHE_MAX_ORDER); - nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; -#endif - if (unlikely(!page)) - page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); - - nc->va = page ? page_address(page) : NULL; - - return page; -} - -void page_frag_cache_drain(struct page_frag_cache *nc) -{ - if (!nc->va) - return; - - __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); - nc->va = NULL; -} -EXPORT_SYMBOL(page_frag_cache_drain); - -void __page_frag_cache_drain(struct page *page, unsigned int count) -{ - VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); - - if (page_ref_sub_and_test(page, count)) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(__page_frag_cache_drain); - -void *__page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask) -{ - unsigned int size = PAGE_SIZE; - struct page *page; - int offset; - - if (unlikely(!nc->va)) { -refill: - page = __page_frag_cache_refill(nc, gfp_mask); - if (!page) - return NULL; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* Even if we own the page, we do not use atomic_set(). - * This would break get_page_unless_zero() users. - */ - page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); - - /* reset page count bias and offset to start of new frag */ - nc->pfmemalloc = page_is_pfmemalloc(page); - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - nc->offset = size; - } - - offset = nc->offset - fragsz; - if (unlikely(offset < 0)) { - page = virt_to_page(nc->va); - - if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) - goto refill; - - if (unlikely(nc->pfmemalloc)) { - free_unref_page(page, compound_order(page)); - goto refill; - } - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* OK, page count is 0, we can safely set it */ - set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); - - /* reset page count bias and offset to start of new frag */ - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - offset = size - fragsz; - if (unlikely(offset < 0)) { - /* - * The caller is trying to allocate a fragment - * with fragsz > PAGE_SIZE but the cache isn't big - * enough to satisfy the request, this may - * happen in low memory conditions. - * We don't release the cache page because - * it could make memory pressure worse - * so we simply return NULL here. - */ - return NULL; - } - } - - nc->pagecnt_bias--; - offset &= align_mask; - nc->offset = offset; - - return nc->va + offset; -} -EXPORT_SYMBOL(__page_frag_alloc_align); - -/* - * Frees a page fragment allocated out of either a compound or order 0 page. - */ -void page_frag_free(void *addr) -{ - struct page *page = virt_to_head_page(addr); - - if (unlikely(put_page_testzero(page))) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(page_frag_free); - static void *make_alloc_exact(unsigned long addr, unsigned int order, size_t size) { diff --git a/mm/page_frag_cache.c b/mm/page_frag_cache.c new file mode 100644 index 000000000000..609a485cd02a --- /dev/null +++ b/mm/page_frag_cache.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Page fragment allocator + * + * Page Fragment: + * An arbitrary-length arbitrary-offset area of memory which resides within a + * 0 or higher order page. Multiple fragments within that page are + * individually refcounted, in the page's reference counter. + * + * The page_frag functions provide a simple allocation framework for page + * fragments. This is used by the network stack and network device drivers to + * provide a backing region of memory for use as either an sk_buff->head, or to + * be used in the "frags" portion of skb_shared_info. + */ + +#include <linux/export.h> +#include <linux/gfp_types.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/page_frag_cache.h> +#include "internal.h" + +static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, + gfp_t gfp_mask) +{ + struct page *page = NULL; + gfp_t gfp = gfp_mask; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | + __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; + page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, + PAGE_FRAG_CACHE_MAX_ORDER); + nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; +#endif + if (unlikely(!page)) + page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); + + nc->va = page ? page_address(page) : NULL; + + return page; +} + +void page_frag_cache_drain(struct page_frag_cache *nc) +{ + if (!nc->va) + return; + + __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); + nc->va = NULL; +} +EXPORT_SYMBOL(page_frag_cache_drain); + +void __page_frag_cache_drain(struct page *page, unsigned int count) +{ + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + + if (page_ref_sub_and_test(page, count)) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(__page_frag_cache_drain); + +void *__page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask) +{ + unsigned int size = PAGE_SIZE; + struct page *page; + int offset; + + if (unlikely(!nc->va)) { +refill: + page = __page_frag_cache_refill(nc, gfp_mask); + if (!page) + return NULL; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* Even if we own the page, we do not use atomic_set(). + * This would break get_page_unless_zero() users. + */ + page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); + + /* reset page count bias and offset to start of new frag */ + nc->pfmemalloc = page_is_pfmemalloc(page); + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + nc->offset = size; + } + + offset = nc->offset - fragsz; + if (unlikely(offset < 0)) { + page = virt_to_page(nc->va); + + if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) + goto refill; + + if (unlikely(nc->pfmemalloc)) { + free_unref_page(page, compound_order(page)); + goto refill; + } + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* OK, page count is 0, we can safely set it */ + set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); + + /* reset page count bias and offset to start of new frag */ + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + offset = size - fragsz; + if (unlikely(offset < 0)) { + /* + * The caller is trying to allocate a fragment + * with fragsz > PAGE_SIZE but the cache isn't big + * enough to satisfy the request, this may + * happen in low memory conditions. + * We don't release the cache page because + * it could make memory pressure worse + * so we simply return NULL here. + */ + return NULL; + } + } + + nc->pagecnt_bias--; + offset &= align_mask; + nc->offset = offset; + + return nc->va + offset; +} +EXPORT_SYMBOL(__page_frag_alloc_align); + +/* + * Frees a page fragment allocated out of either a compound or order 0 page. + */ +void page_frag_free(void *addr) +{ + struct page *page = virt_to_head_page(addr); + + if (unlikely(put_page_testzero(page))) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(page_frag_free); diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index eeb2b6bc681a..fdf204550c9a 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -6,12 +6,12 @@ * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> */ -#include <linux/mm.h> #include <linux/module.h> #include <linux/cpumask.h> #include <linux/completion.h> #include <linux/ptr_ring.h> #include <linux/kthread.h> +#include <linux/page_frag_cache.h> static struct ptr_ring ptr_ring; static int nr_objs = 512; -- 2.34.1

9 months

1
0
0 0

[PATCH net-next v19 01/14] mm: page_frag: add a test module for page_frag

by Yunsheng Lin

The testing is done by ensuring that the fragment allocated from a frag_frag_cache instance is pushed into a ptr_ring instance in a kthread binded to a specified cpu, and a kthread binded to a specified cpu will pop the fragment from the ptr_ring and free the fragment. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- tools/testing/selftests/mm/Makefile | 3 + tools/testing/selftests/mm/page_frag/Makefile | 18 ++ .../selftests/mm/page_frag/page_frag_test.c | 173 ++++++++++++++++++ tools/testing/selftests/mm/run_vmtests.sh | 8 + tools/testing/selftests/mm/test_page_frag.sh | 171 +++++++++++++++++ 5 files changed, 373 insertions(+) create mode 100644 tools/testing/selftests/mm/page_frag/Makefile create mode 100644 tools/testing/selftests/mm/page_frag/page_frag_test.c create mode 100755 tools/testing/selftests/mm/test_page_frag.sh diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index 02e1204971b0..acec529baaca 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -36,6 +36,8 @@ MAKEFLAGS += --no-builtin-rules CFLAGS = -Wall -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES) LDLIBS = -lrt -lpthread -lm +TEST_GEN_MODS_DIR := page_frag + TEST_GEN_FILES = cow TEST_GEN_FILES += compaction_test TEST_GEN_FILES += gup_longterm @@ -126,6 +128,7 @@ TEST_FILES += test_hmm.sh TEST_FILES += va_high_addr_switch.sh TEST_FILES += charge_reserved_hugetlb.sh TEST_FILES += hugetlb_reparenting_test.sh +TEST_FILES += test_page_frag.sh # required by charge_reserved_hugetlb.sh TEST_FILES += write_hugetlb_memory.sh diff --git a/tools/testing/selftests/mm/page_frag/Makefile b/tools/testing/selftests/mm/page_frag/Makefile new file mode 100644 index 000000000000..58dda74d50a3 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/Makefile @@ -0,0 +1,18 @@ +PAGE_FRAG_TEST_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST))))) +KDIR ?= $(abspath $(PAGE_FRAG_TEST_DIR)/../../../../..) + +ifeq ($(V),1) +Q = +else +Q = @ +endif + +MODULES = page_frag_test.ko + +obj-m += page_frag_test.o + +all: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) modules + +clean: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) clean diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c new file mode 100644 index 000000000000..eeb2b6bc681a --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Test module for page_frag cache + * + * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> + */ + +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/cpumask.h> +#include <linux/completion.h> +#include <linux/ptr_ring.h> +#include <linux/kthread.h> + +static struct ptr_ring ptr_ring; +static int nr_objs = 512; +static atomic_t nthreads; +static struct completion wait; +static struct page_frag_cache test_nc; +static int test_popped; +static int test_pushed; + +static int nr_test = 2000000; +module_param(nr_test, int, 0); +MODULE_PARM_DESC(nr_test, "number of iterations to test"); + +static bool test_align; +module_param(test_align, bool, 0); +MODULE_PARM_DESC(test_align, "use align API for testing"); + +static int test_alloc_len = 2048; +module_param(test_alloc_len, int, 0); +MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); + +static int test_push_cpu; +module_param(test_push_cpu, int, 0); +MODULE_PARM_DESC(test_push_cpu, "test cpu for pushing fragment"); + +static int test_pop_cpu; +module_param(test_pop_cpu, int, 0); +MODULE_PARM_DESC(test_pop_cpu, "test cpu for popping fragment"); + +static int page_frag_pop_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag pop test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_popped < nr_test) { + void *obj = __ptr_ring_consume(ring); + + if (obj) { + test_popped++; + page_frag_free(obj); + } else { + cond_resched(); + } + } + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + pr_info("page_frag pop test thread exits on cpu %d\n", + smp_processor_id()); + + return 0; +} + +static int page_frag_push_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag push test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_pushed < nr_test) { + void *va; + int ret; + + if (test_align) { + va = page_frag_alloc_align(&test_nc, test_alloc_len, + GFP_KERNEL, SMP_CACHE_BYTES); + + WARN_ONCE((unsigned long)va & (SMP_CACHE_BYTES - 1), + "unaligned va returned\n"); + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } + + if (!va) + continue; + + ret = __ptr_ring_produce(ring, va); + if (ret) { + page_frag_free(va); + cond_resched(); + } else { + test_pushed++; + } + } + + pr_info("page_frag push test thread exits on cpu %d\n", + smp_processor_id()); + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + return 0; +} + +static int __init page_frag_test_init(void) +{ + struct task_struct *tsk_push, *tsk_pop; + ktime_t start; + u64 duration; + int ret; + + test_nc.va = NULL; + atomic_set(&nthreads, 2); + init_completion(&wait); + + if (test_alloc_len > PAGE_SIZE || test_alloc_len <= 0 || + !cpu_active(test_push_cpu) || !cpu_active(test_pop_cpu)) + return -EINVAL; + + ret = ptr_ring_init(&ptr_ring, nr_objs, GFP_KERNEL); + if (ret) + return ret; + + tsk_push = kthread_create_on_cpu(page_frag_push_thread, &ptr_ring, + test_push_cpu, "page_frag_push"); + if (IS_ERR(tsk_push)) + return PTR_ERR(tsk_push); + + tsk_pop = kthread_create_on_cpu(page_frag_pop_thread, &ptr_ring, + test_pop_cpu, "page_frag_pop"); + if (IS_ERR(tsk_pop)) { + kthread_stop(tsk_push); + return PTR_ERR(tsk_pop); + } + + start = ktime_get(); + wake_up_process(tsk_push); + wake_up_process(tsk_pop); + + pr_info("waiting for test to complete\n"); + + while (!wait_for_completion_timeout(&wait, msecs_to_jiffies(10000))) + pr_info("page_frag_test progress: pushed = %d, popped = %d\n", + test_pushed, test_popped); + + duration = (u64)ktime_us_delta(ktime_get(), start); + pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", duration); + + ptr_ring_cleanup(&ptr_ring, NULL); + page_frag_cache_drain(&test_nc); + + return -EAGAIN; +} + +static void __exit page_frag_test_exit(void) +{ +} + +module_init(page_frag_test_init); +module_exit(page_frag_test_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Yunsheng Lin <linyunsheng(a)huawei.com>"); +MODULE_DESCRIPTION("Test module for page_frag"); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index c5797ad1d37b..2c5394584af4 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -75,6 +75,8 @@ separated by spaces: read-only VMAs - mdwe test prctl(PR_SET_MDWE, ...) +- page_frag + test handling of page fragment allocation and freeing example: ./run_vmtests.sh -t "hmm mmap ksm" EOF @@ -456,6 +458,12 @@ CATEGORY="mkdirty" run_test ./mkdirty CATEGORY="mdwe" run_test ./mdwe_test +CATEGORY="page_frag" run_test ./test_page_frag.sh smoke + +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh new file mode 100755 index 000000000000..d750d910c899 --- /dev/null +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -0,0 +1,171 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> +# Copyright (C) 2018 Uladzislau Rezki (Sony) <urezki(a)gmail.com> +# +# This is a test script for the kernel test driver to test the +# correctness and performance of page_frag's implementation. +# Therefore it is just a kernel module loader. You can specify +# and pass different parameters in order to: +# a) analyse performance of page fragment allocations; +# b) stressing and stability check of page_frag subsystem. + +DRIVER="./page_frag/page_frag_test.ko" +CPU_LIST=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) +TEST_CPU_0=$(echo $CPU_LIST | awk '{print $1}') + +if [ $(echo $CPU_LIST | wc -w) -gt 1 ]; then + TEST_CPU_1=$(echo $CPU_LIST | awk '{print $2}') + NR_TEST=100000000 +else + TEST_CPU_1=$TEST_CPU_0 + NR_TEST=1000000 +fi + +# 1 if fails +exitcode=1 + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +# +# Static templates for testing of page_frag APIs. +# Also it is possible to pass any supported parameters manually. +# +SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" +NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" +ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" + +check_test_requirements() +{ + uid=$(id -u) + if [ $uid -ne 0 ]; then + echo "$0: Must be run as root" + exit $ksft_skip + fi + + if ! which insmod > /dev/null 2>&1; then + echo "$0: You need insmod installed" + exit $ksft_skip + fi + + if [ ! -f $DRIVER ]; then + echo "$0: You need to compile page_frag_test module" + exit $ksft_skip + fi +} + +run_nonaligned_check() +{ + echo "Run performance tests to evaluate how fast nonaligned alloc API is." + + insmod $DRIVER $NONALIGNED_PARAM > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +run_aligned_check() +{ + echo "Run performance tests to evaluate how fast aligned alloc API is." + + insmod $DRIVER $ALIGNED_PARAM > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +run_smoke_check() +{ + echo "Run smoke test." + + insmod $DRIVER $SMOKE_PARAM > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +usage() +{ + echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "manual parameters" + echo + echo "Valid tests and parameters:" + echo + modinfo $DRIVER + echo + echo "Example usage:" + echo + echo "# Shows help message" + echo "$0" + echo + echo "# Smoke testing" + echo "$0 smoke" + echo + echo "# Performance testing for nonaligned alloc API" + echo "$0 nonaligned" + echo + echo "# Performance testing for aligned alloc API" + echo "$0 aligned" + echo + exit 0 +} + +function validate_passed_args() +{ + VALID_ARGS=`modinfo $DRIVER | awk '/parm:/ {print $2}' | sed 's/:.*//'` + + # + # Something has been passed, check it. + # + for passed_arg in $@; do + key=${passed_arg//=*/} + valid=0 + + for valid_arg in $VALID_ARGS; do + if [[ $key = $valid_arg ]]; then + valid=1 + break + fi + done + + if [[ $valid -ne 1 ]]; then + echo "Error: key is not correct: ${key}" + exit $exitcode + fi + done +} + +function run_manual_check() +{ + # + # Validate passed parameters. If there is wrong one, + # the script exists and does not execute further. + # + validate_passed_args $@ + + echo "Run the test with following parameters: $@" + insmod $DRIVER $@ > /dev/null 2>&1 + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +function run_test() +{ + if [ $# -eq 0 ]; then + usage + else + if [[ "$1" = "smoke" ]]; then + run_smoke_check + elif [[ "$1" = "nonaligned" ]]; then + run_nonaligned_check + elif [[ "$1" = "aligned" ]]; then + run_aligned_check + else + run_manual_check $@ + fi + fi +} + +check_test_requirements +run_test $@ + +exit 0 -- 2.34.1

9 months

1
0
0 0

[PATCH bpf-next/net v7 0/3] selftests/bpf: new MPTCP subflow subtest

by Matthieu Baerts (NGI0)

In this series from Geliang, modifying MPTCP BPF selftests, we have: - A new MPTCP subflow BPF program setting socket options per subflow: it looks better to have this old test program in the BPF selftests to track regressions and to serve as example. Note: Nicolas is no longer working at Tessares, but he did this work while working for them, and his email address is no longer available. - A new hook in the same BPF program to do the verification step. - A new MPTCP BPF subtest validating the new BPF program added in the first patch, with the help of the new hook added in the second patch. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Changes in v7: - Patch 2/3: use 'can_loop' instead of 'cond_break'. (Martin) - Patch 3/3: use bpf_program__attach_cgroup(). (Martin) - Link to v6: https://lore.kernel.org/r/20240911-upstream-bpf-next-20240506-mptcp-subflow… Changes in v6: - Patch 3/3: use usleep() instead of sleep() - Series: rebased on top of bpf-next/net - Link to v5: https://lore.kernel.org/r/20240910-upstream-bpf-next-20240506-mptcp-subflow… Changes in v5: - See the individual changelog for more details about them - Patch 1/3: set TCP on the 2nd subflow - Patch 2/3: new - Patch 3/3: use the BPF program from patch 2/3 to do the validation instead of using ss. - Series: rebased on top of bpf-next/net - Link to v4: https://lore.kernel.org/r/20240805-upstream-bpf-next-20240506-mptcp-subflow… Changes in v4: - Drop former patch 2/3: MPTCP's pm_nl_ctl requires a new header file: - I will check later if it is possible to avoid having duplicated header files in tools/include/uapi, but no need to block this series for that. Patch 2/3 can be added later if needed. - Patch 2/2: skip the test if 'ip mptcp' is not available. - Link to v3: https://lore.kernel.org/r/20240703-upstream-bpf-next-20240506-mptcp-subflow… Changes in v3: - Sorry for the delay between v2 and v3, this series was conflicting with the "add netns helpers", but it looks like it is on hold: https://lore.kernel.org/cover.1715821541.git.tanggeliang@kylinos.cn - Patch 1/3 includes "bpf_tracing_net.h", introduced in between. - New patch 2/3: "selftests/bpf: Add mptcp pm_nl_ctl link". - Patch 3/3: use the tool introduced in patch 2/3 + SYS_NOFAIL() helper. - Link to v2: https://lore.kernel.org/r/20240509-upstream-bpf-next-20240506-mptcp-subflow… Changes in v2: - Previous patches 1/4 and 2/4 have been dropped from this series: - 1/4: "selftests/bpf: Handle SIGINT when creating netns": - A new version, more generic and no longer specific to MPTCP BPF selftest will be sent later, as part of a new series. (Alexei) - 2/4: "selftests/bpf: Add RUN_MPTCP_TEST macro": - Removed, not to hide helper functions in macros. (Alexei) - The commit message of patch 1/2 has been clarified to avoid some possible confusions spot by Alexei. - Link to v1: https://lore.kernel.org/r/20240507-upstream-bpf-next-20240506-mptcp-subflow… --- Geliang Tang (2): selftests/bpf: Add getsockopt to inspect mptcp subflow selftests/bpf: Add mptcp subflow subtest Nicolas Rybowski (1): selftests/bpf: Add mptcp subflow example MAINTAINERS | 2 +- tools/testing/selftests/bpf/prog_tests/mptcp.c | 121 ++++++++++++++++++++ tools/testing/selftests/bpf/progs/mptcp_bpf.h | 42 +++++++ tools/testing/selftests/bpf/progs/mptcp_subflow.c | 128 ++++++++++++++++++++++ 4 files changed, 292 insertions(+), 1 deletion(-) --- base-commit: 151ac45348afc5b56baa584c7cd4876addf461ff change-id: 20240506-upstream-bpf-next-20240506-mptcp-subflow-test-faef6654bfa3 Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

9 months

2
4
0 0

[PATCH net-next 0/3] net-timestamp: add some trivial

by Jason Xing

From: Jason Xing <kernelxing(a)tencent.com> When reading through the whole feature, I feel we can do these things to make it more robust. They are trivial changes, not big ones. Jason Xing (3): net-timestamp: add strict check when setting tx flags net-timestamp: add OPT_ID_TCP test in selftests net-timestamp: namespacify the sysctl_tstamp_allow_data include/net/netns/core.h | 1 + include/net/sock.h | 2 -- net/core/net_namespace.c | 1 + net/core/skbuff.c | 2 +- net/core/sock.c | 4 ++++ net/core/sysctl_net_core.c | 18 +++++++++--------- tools/testing/selftests/net/txtimestamp.c | 6 ++++++ 7 files changed, 22 insertions(+), 12 deletions(-) -- 2.37.3

9 months

3
19
0 0

[PATCH v3 00/19] random: Resolve circular include dependency and include <linux/percpu.h>

by Uros Bizjak

There were several attempts to resolve circular include dependency after the addition of percpu.h: 1c9df907da83 ("random: fix circular include dependency on arm64 after addition of percpu.h"), c0842fbc1b18 ("random32: move the pseudo-random 32-bit definitions to prandom.h") and finally d9f29deb7fe8 ("prandom: Remove unused include") that completely removes the inclusion of <linux/percpu.h>. Due to legacy reasons, <linux/random.h> includes <linux/prandom.h>, but with the commit entry remark: --quote-- A further cleanup step would be to remove this from <linux/random.h> entirely, and make people who use the prandom infrastructure include just the new header file. That's a bit of a churn patch, but grepping for "prandom_" and "next_pseudo_random32" "struct rnd_state" should catch most users. But it turns out that that nice cleanup step is fairly painful, because a _lot_ of code currently seems to depend on the implicit include of <linux/random.h>, which can currently come in a lot of ways, including such fairly core headfers as <linux/net.h>. So the "nice cleanup" part may or may never happen. --/quote-- We would like to include <linux/percpu.h> in <linux/prandom.h>. In [1] we would like to repurpose __percpu tag as a named address space qualifier, where __percpu macro uses defines from <linux/percpu.h>. The major roadblock to inclusion of <linux/percpu.h> is the above mentioned legacy inclusion of <linux/prandom.h> in <linux/random.h> that causes circular include dependency that prevents <linux/percpu.h> inclusion. This patch series is the "nice cleanup" part that: a) Substitutes the inclusion of <linux/random.h> with the inclusion of <linux/prandom.h> where needed (patches 1 - 17). b) Removes legacy inclusion of <linux/prandom.h> from <linux/random.h> (patch 18). c) Includes <linux/percpu.h> in <linux/prandom.h> (patch 19). The whole series was tested by compiling the kernel for x86_64 allconfig and some popular architectures, namely arm64 defconfig, powerpc defconfig and loongarch defconfig. [1] https://lore.kernel.org/lkml/20240812115945.484051-4-ubizjak@gmail.com/ Cc: Dave Hansen <dave.hansen(a)linux.intel.com> Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: Jani Nikula <jani.nikula(a)linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen(a)linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi(a)intel.com> Cc: Tvrtko Ursulin <tursulin(a)ursulin.net> Cc: David Airlie <airlied(a)gmail.com> Cc: Daniel Vetter <daniel(a)ffwll.ch> Cc: Maarten Lankhorst <maarten.lankhorst(a)linux.intel.com> Cc: Maxime Ripard <mripard(a)kernel.org> Cc: Thomas Zimmermann <tzimmermann(a)suse.de> Cc: Hans Verkuil <hverkuil(a)xs4all.nl> Cc: Mauro Carvalho Chehab <mchehab(a)kernel.org> Cc: Miquel Raynal <miquel.raynal(a)bootlin.com> Cc: Richard Weinberger <richard(a)nod.at> Cc: Vignesh Raghavendra <vigneshr(a)ti.com> Cc: Eric Biggers <ebiggers(a)kernel.org> Cc: "Theodore Y. Ts'o" <tytso(a)mit.edu> Cc: Jaegeuk Kim <jaegeuk(a)kernel.org> Cc: "Jason A. Donenfeld" <Jason(a)zx2c4.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Hannes Reinecke <hare(a)suse.de> Cc: "James E.J. Bottomley" <James.Bottomley(a)HansenPartnership.com> Cc: "Martin K. Petersen" <martin.petersen(a)oracle.com> Cc: Alexei Starovoitov <ast(a)kernel.org> Cc: Daniel Borkmann <daniel(a)iogearbox.net> Cc: John Fastabend <john.fastabend(a)gmail.com> Cc: Andrii Nakryiko <andrii(a)kernel.org> Cc: Martin KaFai Lau <martin.lau(a)linux.dev> Cc: Eduard Zingerman <eddyz87(a)gmail.com> Cc: Song Liu <song(a)kernel.org> Cc: Yonghong Song <yonghong.song(a)linux.dev> Cc: KP Singh <kpsingh(a)kernel.org> Cc: Stanislav Fomichev <sdf(a)fomichev.me> Cc: Hao Luo <haoluo(a)google.com> Cc: Jiri Olsa <jolsa(a)kernel.org> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Rae Moar <rmoar(a)google.com> Cc: "David S. Miller" <davem(a)davemloft.net> Cc: Eric Dumazet <edumazet(a)google.com> Cc: Jakub Kicinski <kuba(a)kernel.org> Cc: Paolo Abeni <pabeni(a)redhat.com> Cc: Jiri Pirko <jiri(a)resnulli.us> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Steven Rostedt <rostedt(a)goodmis.org> Cc: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> Cc: Rasmus Villemoes <linux(a)rasmusvillemoes.dk> Cc: Sergey Senozhatsky <senozhatsky(a)chromium.org> Cc: Stephen Hemminger <stephen(a)networkplumber.org> Cc: Jamal Hadi Salim <jhs(a)mojatatu.com> Cc: Cong Wang <xiyou.wangcong(a)gmail.com> Cc: Kent Overstreet <kent.overstreet(a)linux.dev> --- v2: - Reword commit messages to mention the removal of legacy inclusion of <linux/prandom.h> from <linux/random.h> - Add missing substitution in crypto/testmgr.c (reported by kernel test robot) - Add Acked-by: tags. v3: - Update to linux 6.12rc1. - Add more Acked-by: tags. Uros Bizjak (19): x86/kaslr: Include <linux/prandom.h> instead of <linux/random.h> crypto: testmgr: Include <linux/prandom.h> instead of <linux/random.h> drm/i915/selftests: Include <linux/prandom.h> instead of <linux/random.h> drm/lib: Include <linux/prandom.h> instead of <linux/random.h> media: vivid: Include <linux/prandom.h> in vivid-vid-cap.c mtd: tests: Include <linux/prandom.h> instead of <linux/random.h> fscrypt: Include <linux/once.h> in fs/crypto/keyring.c scsi: libfcoe: Include <linux/prandom.h> instead of <linux/random.h> bpf: Include <linux/prandom.h> instead of <linux/random.h> lib/interval_tree_test.c: Include <linux/prandom.h> instead of <linux/random.h> kunit: string-stream-test: Include <linux/prandom.h> random32: Include <linux/prandom.h> instead of <linux/random.h> lib/rbtree-test: Include <linux/prandom.h> instead of <linux/random.h> bpf/tests: Include <linux/prandom.h> instead of <linux/random.h> lib/test_parman: Include <linux/prandom.h> instead of <linux/random.h> lib/test_scanf: Include <linux/prandom.h> instead of <linux/random.h> netem: Include <linux/prandom.h> in sch_netem.c random: Do not include <linux/prandom.h> in <linux/random.h> prandom: Include <linux/percpu.h> in <linux/prandom.h> arch/x86/mm/kaslr.c | 2 +- crypto/testmgr.c | 2 +- drivers/gpu/drm/i915/selftests/i915_gem.c | 2 +- drivers/gpu/drm/i915/selftests/i915_random.h | 2 +- drivers/gpu/drm/i915/selftests/scatterlist.c | 2 +- drivers/gpu/drm/lib/drm_random.h | 2 +- drivers/media/test-drivers/vivid/vivid-vid-cap.c | 1 + drivers/mtd/tests/oobtest.c | 2 +- drivers/mtd/tests/pagetest.c | 2 +- drivers/mtd/tests/subpagetest.c | 2 +- fs/crypto/keyring.c | 1 + include/linux/prandom.h | 1 + include/linux/random.h | 7 ------- include/scsi/libfcoe.h | 2 +- kernel/bpf/core.c | 2 +- lib/interval_tree_test.c | 2 +- lib/kunit/string-stream-test.c | 1 + lib/random32.c | 2 +- lib/rbtree_test.c | 2 +- lib/test_bpf.c | 2 +- lib/test_parman.c | 2 +- lib/test_scanf.c | 2 +- net/sched/sch_netem.c | 1 + 23 files changed, 22 insertions(+), 24 deletions(-) -- 2.46.2

9 months

4
22
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