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[PATCH bpf-next/net v3 0/5] bpf: Add mptcp_subflow bpf_iter support

by Matthieu Baerts (NGI0)

Here is a series from Geliang, adding mptcp_subflow bpf_iter support. We are working on extending MPTCP with BPF, e.g. to control the path manager -- in charge of the creation, deletion, and announcements of subflows (paths) -- and the packet scheduler -- in charge of selecting which available path the next data will be sent to. These extensions need to iterate over the list of subflows attached to an MPTCP connection, and do some specific actions via some new kfunc that will be added later on. This preparation work is split in different patches: - Patch 1: register some "basic" MPTCP kfunc. - Patch 2: add mptcp_subflow bpf_iter support. Note that previous versions of this single patch have already been shared to the BPF mailing list. The changelog has been kept with a comment, but the version number has been reset to avoid confusions. - Patch 3: add more MPTCP endpoints in the selftests, in order to create more than 2 subflows. - Patch 4: add a very simple test validating mptcp_subflow bpf_iter support. This test could be written without the new bpf_iter, but it is there only to make sure this specific feature works as expected. - Patch 5: a small fix to drop an unused parameter in the selftests. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Changes in v3: - Previous patches 1, 2 and 5 were no longer needed. (Martin) - Patch 2: Switch to 'struct sock' and drop unneeded checks. (Martin) - Patch 4: Adapt the test accordingly. - Patch 5: New small fix for the selftests. - Examples and questions for BPF maintainers have been added in Patch 2. - Link to v2: https://lore.kernel.org/r/20241219-bpf-next-net-mptcp-bpf_iter-subflows-v2-… Changes in v2: - Patches 1-2: new ones. - Patch 3: remove two kfunc, more restrictions. (Martin) - Patch 4: add BUILD_BUG_ON(), more restrictions. (Martin) - Patch 7: adaptations due to modifications in patches 1-4. - Link to v1: https://lore.kernel.org/r/20241108-bpf-next-net-mptcp-bpf_iter-subflows-v1-… --- Geliang Tang (5): bpf: Register mptcp common kfunc set bpf: Add mptcp_subflow bpf_iter selftests/bpf: More endpoints for endpoint_init selftests/bpf: Add mptcp_subflow bpf_iter subtest selftests/bpf: Drop cgroup_fd of run_mptcpify net/mptcp/bpf.c | 87 +++++++++++++- tools/testing/selftests/bpf/bpf_experimental.h | 8 ++ tools/testing/selftests/bpf/prog_tests/mptcp.c | 133 +++++++++++++++++++-- tools/testing/selftests/bpf/progs/mptcp_bpf.h | 4 + .../testing/selftests/bpf/progs/mptcp_bpf_iters.c | 59 +++++++++ 5 files changed, 282 insertions(+), 9 deletions(-) --- base-commit: dad704ebe38642cd405e15b9c51263356391355c change-id: 20241108-bpf-next-net-mptcp-bpf_iter-subflows-027f6d87770e Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

1 week, 5 days

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[PATCH 0/9] tools/nolibc: split out more headers

by Thomas Weißschuh

Split out all headers which are used by nolibc-test.c. This makes it easier to port existing applications to nolibc. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- Thomas Weißschuh (9): tools/nolibc: move ioctl() to sys/ioctl.h tools/nolibc: move mount() to sys/mount.h tools/nolibc: move prctl() to sys/prctl.h tools/nolibc: move reboot() to sys/reboot.h tools/nolibc: move getrlimit() and friends to sys/resource.h tools/nolibc: move makedev() and friends to sys/sysmacros.h tools/nolibc: move uname() and friends to sys/utsname.h tools/nolibc: move NULL and offsetof() to sys/stddef.h selftests/nolibc: drop include guards around standard headers tools/include/nolibc/Makefile | 8 ++ tools/include/nolibc/nolibc.h | 7 ++ tools/include/nolibc/std.h | 6 +- tools/include/nolibc/stddef.h | 24 +++++ tools/include/nolibc/sys.h | 136 --------------------------- tools/include/nolibc/sys/ioctl.h | 29 ++++++ tools/include/nolibc/sys/mount.h | 37 ++++++++ tools/include/nolibc/sys/prctl.h | 36 +++++++ tools/include/nolibc/sys/reboot.h | 34 +++++++ tools/include/nolibc/sys/resource.h | 53 +++++++++++ tools/include/nolibc/sys/sysmacros.h | 20 ++++ tools/include/nolibc/sys/utsname.h | 42 +++++++++ tools/include/nolibc/types.h | 11 --- tools/testing/selftests/nolibc/nolibc-test.c | 5 - 14 files changed, 291 insertions(+), 157 deletions(-) --- base-commit: 6a25f787912a73613f12e7eefbebd72ee3d43f85 change-id: 20250515-nolibc-sys-31a4fd76d897 Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

1 week, 5 days

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[PATCH v2] selftests: filesystems: fix "memebers" typo in mount-notify

by Hendrik Hamerlinck

Corrects a spelling mistake "memebers" instead of "members" in tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c Signed-off-by: Hendrik Hamerlinck <hendrik.hamerlinck(a)hammernet.be> --- Changes since v1: Improved commit message to be consistent with other commit messages. .../selftests/filesystems/mount-notify/mount-notify_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c index 59a71f22fb11..af2b61224a61 100644 --- a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c +++ b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c @@ -230,7 +230,7 @@ static void verify_mount_ids(struct __test_metadata *const _metadata, } } } - // Check that all list1 memebers can be found in list2. Together with + // Check that all list1 members can be found in list2. Together with // the above it means that the list1 and list2 represent the same sets. for (i = 0; i < num; i++) { for (j = 0; j < num; j++) { -- 2.43.0

1 week, 5 days

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[PATCH v2] selftests: ir_decoder: Convert header comment to proper multi-line block

by Abdelrahman Fekry

v2- fixed multiple trailing whitespace errors and the Signed-off-by mismatch The test file for the IR decoder used single-line comments at the top to document its purpose and licensing, which is inconsistent with the style used throughout the Linux kernel. In this patch i converted the file header to a proper multi-line comment block (/*) that aligns with standard kernel practices. This improves readability, consistency across selftests, and ensures the license and documentation are clearly visible in a familiar format. No functional changes have been made. Signed-off-by: Abdelrahman Fekry <abdelrahmanfekry375(a)gmail.com> --- tools/testing/selftests/ir/ir_loopback.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/ir/ir_loopback.c b/tools/testing/selftests/ir/ir_loopback.c index f4a15cbdd5ea..c94faa975630 100644 --- a/tools/testing/selftests/ir/ir_loopback.c +++ b/tools/testing/selftests/ir/ir_loopback.c @@ -1,14 +1,17 @@ // SPDX-License-Identifier: GPL-2.0 -// test ir decoder -// -// Copyright (C) 2018 Sean Young <sean(a)mess.org> - -// When sending LIRC_MODE_SCANCODE, the IR will be encoded. rc-loopback -// will send this IR to the receiver side, where we try to read the decoded -// IR. Decoding happens in a separate kernel thread, so we will need to -// wait until that is scheduled, hence we use poll to check for read -// readiness. - +/* Copyright (C) 2018 Sean Young <sean(a)mess.org> + * + * Selftest for IR decoder + * + * + * When sending LIRC_MODE_SCANCODE, the IR will be encoded. + * rc-loopback will send this IR to the receiver side, + * where we try to read the decoded IR. + * Decoding happens in a separate kernel thread, + * so we will need to wait until that is scheduled, + * hence we use poll to check for read + * readiness. + */ #include <linux/lirc.h> #include <errno.h> #include <stdio.h> -- 2.25.1

1 week, 5 days

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[PATCH v2] selftests: size: fix grammar and align output formatting

by Abdelrahman Fekry

This is v2 of the patch. The Signed-off-by line mismatch reported by checkpatch has been fixed. Improve the grammar in the test name by changing "get runtime memory use" to "get runtime memory usage". Also adjust spacing in output lines ("Total:", "Free:", etc.) to ensure consistent alignment and readability. Signed-off-by: Abdelrahman Fekry <abdelrahmanfekry375(a)gmail.com> --- tools/testing/selftests/size/get_size.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/size/get_size.c b/tools/testing/selftests/size/get_size.c index 2980b1a63366..d5b67c073d8e 100644 --- a/tools/testing/selftests/size/get_size.c +++ b/tools/testing/selftests/size/get_size.c @@ -86,7 +86,7 @@ void _start(void) int ccode; struct sysinfo info; unsigned long used; - static const char *test_name = " get runtime memory use\n"; + static const char *test_name = " get runtime memory usage\n"; print("TAP version 13\n"); print("# Testing system size.\n"); @@ -105,8 +105,8 @@ void _start(void) used = info.totalram - info.freeram - info.bufferram; print("# System runtime memory report (units in Kilobytes):\n"); print(" ---\n"); - print_k_value(" Total: ", info.totalram, info.mem_unit); - print_k_value(" Free: ", info.freeram, info.mem_unit); + print_k_value(" Total : ", info.totalram, info.mem_unit); + print_k_value(" Free : ", info.freeram, info.mem_unit); print_k_value(" Buffer: ", info.bufferram, info.mem_unit); print_k_value(" In use: ", used, info.mem_unit); print(" ...\n"); -- 2.25.1

1 week, 5 days

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[PATCH v2] selftests: acct: fix grammar and clarify output messages - Fixed email case mismatch in Signed-off-by

by Abdelrahman Fekry

This patch improves the clarity and grammar of output messages in the acct() selftest. Minor changes were made to user-facing strings and comments to make them easier to understand and more consistent with the kselftest style. Changes include: - Fixing grammar in printed messages and comments. - Rewording error and success outputs for clarity and professionalism. - Making the "root check" message more direct. These updates improve readability without affecting test logic or behavior. Signed-off-by: Abdelrahman Fekry <abdelrahmanfekry375(a)gmail.com> --- tools/testing/selftests/acct/acct_syscall.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/acct/acct_syscall.c b/tools/testing/selftests/acct/acct_syscall.c index 87c044fb9293..2c120a527574 100644 --- a/tools/testing/selftests/acct/acct_syscall.c +++ b/tools/testing/selftests/acct/acct_syscall.c @@ -22,9 +22,9 @@ int main(void) ksft_print_header(); ksft_set_plan(1); - // Check if test is run a root + // Check if test is run as root if (geteuid()) { - ksft_exit_skip("This test needs root to run!\n"); + ksft_exit_skip("This test must be run as root!\n"); return 1; } @@ -52,7 +52,7 @@ int main(void) child_pid = fork(); if (child_pid < 0) { - ksft_test_result_error("Creating a child process to log failed\n"); + ksft_test_result_error("Failed to create child process for logging\n"); acct(NULL); return 1; } else if (child_pid > 0) { -- 2.25.1

1 week, 5 days

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[PATCH 1/1] Fix typo in cpu-on-off-test selftest script:

by Jihed Chaibi

Fix typo in hotplaggable_offline_cpus function name: "hotplaggable" is replaced by "hotpluggable" Signed-off-by: Jihed Chaibi <jihed.chaibi.dev(a)gmail.com> --- tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh b/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh index d5dc7e0dc..6232a46ca 100755 --- a/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh +++ b/tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh @@ -67,7 +67,7 @@ hotpluggable_cpus() done } -hotplaggable_offline_cpus() +hotpluggable_offline_cpus() { hotpluggable_cpus 0 } @@ -151,7 +151,7 @@ offline_cpu_expect_fail() online_all_hot_pluggable_cpus() { - for cpu in `hotplaggable_offline_cpus`; do + for cpu in `hotpluggable_offline_cpus`; do online_cpu_expect_success $cpu done } -- 2.39.5

1 week, 5 days

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[PATCH] selftests: cachestat: add mmap test and /proc/cpuinfo test case

by Suresh K C

From: Suresh K C <suresh.k.chandrappa(a)gmail.com> This patch adds a new test case to validate cachestat behavior with memory-mapped files using mmap(). The test ensures that pages are properly cached when accessed via mmap and verifies the expected number of cached pages. Additionally, a test case for /proc/cpuinfo has been added to observe how cachestat handles virtual files under /proc. This helps improve coverage of edge cases involving pseudo-filesystems Signed-off-by: Suresh K C <suresh.k.chandrappa(a)gmail.com> --- .../selftests/cachestat/test_cachestat.c | 69 ++++++++++++++++++- 1 file changed, 67 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c index 632ab44737ec..81e7f6dd2279 100644 --- a/tools/testing/selftests/cachestat/test_cachestat.c +++ b/tools/testing/selftests/cachestat/test_cachestat.c @@ -22,7 +22,7 @@ static const char * const dev_files[] = { "/dev/zero", "/dev/null", "/dev/urandom", - "/proc/version", "/proc" + "/proc/version","/proc/cpuinfo","/proc" }; void print_cachestat(struct cachestat *cs) @@ -202,6 +202,65 @@ static int test_cachestat(const char *filename, bool write_random, bool create, return ret; } +bool test_cachestat_mmap(void){ + + size_t PS = sysconf(_SC_PAGESIZE); + size_t filesize = PS * 512 * 2;; + int syscall_ret; + size_t compute_len = PS * 512; + struct cachestat_range cs_range = { PS, compute_len }; + char *filename = "tmpshmcstat"; + unsigned long num_pages = compute_len / PS; + struct cachestat cs; + bool ret = true; + int fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0666); + if (fd < 0) { + ksft_print_msg("Unable to create mmap file.\n"); + ret = false; + goto out; + } + if (ftruncate(fd, filesize)) { + ksft_print_msg("Unable to truncate mmap file.\n"); + ret = false; + goto close_fd; + } + if (!write_exactly(fd, filesize)) { + ksft_print_msg("Unable to write to mmap file.\n"); + ret = false; + goto close_fd; + } + char *map = mmap(NULL, filesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); + if (map == MAP_FAILED) { + ksft_print_msg("mmap failed.\n"); + ret = false; + goto close_fd; + } + + for (int i = 0; i < filesize; i++) { + map[i] = 'A'; + } + map[filesize - 1] = 'X'; + + syscall_ret = syscall(__NR_cachestat, fd, &cs_range, &cs, 0); + + if (syscall_ret) { + ksft_print_msg("Cachestat returned non-zero.\n"); + ret = false; + } else { + print_cachestat(&cs); + if (cs.nr_cache + cs.nr_evicted != num_pages) { + ksft_print_msg("Total number of cached and evicted pages is off.\n"); + ret = false; + } + } + +close_fd: + close(fd); + unlink(filename); +out: + return ret; +} + bool test_cachestat_shmem(void) { size_t PS = sysconf(_SC_PAGESIZE); @@ -274,7 +333,7 @@ int main(void) ret = 1; } - for (int i = 0; i < 5; i++) { + for (int i = 0; i < 6; i++) { const char *dev_filename = dev_files[i]; if (test_cachestat(dev_filename, false, false, false, @@ -315,5 +374,11 @@ int main(void) ret = 1; } + if (test_cachestat_mmap()) + ksft_test_result_pass("cachestat works with a mmap file\n"); + else { + ksft_test_result_fail("cachestat fails with a mmap file\n"); + ret = 1; + } return ret; } -- 2.43.0

1 week, 6 days

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[PATCH] [PATCH] Change pidns to pid namespace

by rodgepritesh＠gmail.com

From: Pritesh Rodge <rodgepritesh(a)gmail.com> Changed a comment in memfd_test.c , Unabbreviated pidns to pid namespace for better understanding . Signed-off-by: Pritesh Rodge <rodgepritesh(a)gmail.com> --- tools/testing/selftests/memfd/memfd_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c index 5b993924cc3f..4e4c46246a4e 100644 --- a/tools/testing/selftests/memfd/memfd_test.c +++ b/tools/testing/selftests/memfd/memfd_test.c @@ -1359,7 +1359,7 @@ static int sysctl_nested_child(void *arg) printf("%s nested sysctl 0\n", memfd_str); sysctl_assert_write("0"); - /* A further nested pidns works the same. */ + /* A further nested pid-namespace works the same. */ pid = spawn_thread(CLONE_NEWPID, sysctl_simple_child, NULL); join_thread(pid); -- 2.43.0

1 week, 6 days

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[PATCH bpf-next v3 0/8] selftests/bpf: Test sockmap/sockhash redirection

by Michal Luczaj

John, this revision introduces one more patch: "selftests/bpf: Introduce verdict programs for sockmap_redir". I've kept you cross-series Acked-by. I hope it's ok. Jiayuan, I haven't heard back from you regarding [*], so I've kept things unchanged for now. Please let me know what you think. [*] https://lore.kernel.org/bpf/66bf942f-dfdb-4ce9-bd95-8b734e7afa53@rbox.co/ -- The idea behind this series is to comprehensively test the BPF redirection: BPF_MAP_TYPE_SOCKMAP, BPF_MAP_TYPE_SOCKHASH x sk_msg-to-egress, sk_msg-to-ingress, sk_skb-to-egress, sk_skb-to-ingress x AF_INET, SOCK_STREAM, AF_INET6, SOCK_STREAM, AF_INET, SOCK_DGRAM, AF_INET6, SOCK_DGRAM, AF_UNIX, SOCK_STREAM, AF_UNIX, SOCK_DGRAM, AF_VSOCK, SOCK_STREAM, AF_VSOCK, SOCK_SEQPACKET New module is introduced, sockmap_redir: all supported and unsupported redirect combinations are tested for success and failure respectively. Code is pretty much stolen/adapted from Jakub Sitnicki's sockmap_redir_matrix.c [1]. Usage: $ cd tools/testing/selftests/bpf $ make $ sudo ./test_progs -t sockmap_redir ... Summary: 1/576 PASSED, 0 SKIPPED, 0 FAILED [1]: https://github.com/jsitnicki/sockmap-redir-matrix/blob/main/sockmap_redir_m… Changes in v3: - Drop unrelated changes; sockmap_listen, test_sockmap_listen, doc - Collect tags [Jakub, John] - Introduce BPF verdict programs especially for sockmap_redir [Jiayuan] - Link to v2: https://lore.kernel.org/r/20250411-selftests-sockmap-redir-v2-0-5f9b018d670… Changes in v2: - Verify that the unsupported redirect combos do fail [Jakub] - Dedup tests in sockmap_listen - Cosmetic changes and code reordering - Link to v1: https://lore.kernel.org/bpf/42939687-20f9-4a45-b7c2-342a0e11a014@rbox.co/ Suggested-by: Jakub Sitnicki <jakub(a)cloudflare.com> Signed-off-by: Michal Luczaj <mhal(a)rbox.co> --- Michal Luczaj (8): selftests/bpf: Support af_unix SOCK_DGRAM socket pair creation selftests/bpf: Add socket_kind_to_str() to socket_helpers selftests/bpf: Add u32()/u64() to sockmap_helpers selftests/bpf: Introduce verdict programs for sockmap_redir selftests/bpf: Add selftest for sockmap/hashmap redirection selftests/bpf: sockmap_listen cleanup: Drop af_vsock redir tests selftests/bpf: sockmap_listen cleanup: Drop af_unix redir tests selftests/bpf: sockmap_listen cleanup: Drop af_inet SOCK_DGRAM redir tests .../selftests/bpf/prog_tests/socket_helpers.h | 84 +++- .../selftests/bpf/prog_tests/sockmap_helpers.h | 25 +- .../selftests/bpf/prog_tests/sockmap_listen.c | 457 -------------------- .../selftests/bpf/prog_tests/sockmap_redir.c | 465 +++++++++++++++++++++ .../selftests/bpf/progs/test_sockmap_redir.c | 68 +++ 5 files changed, 623 insertions(+), 476 deletions(-) --- base-commit: d0445d7dd3fd9b15af7564c38d7aa3cbc29778ee change-id: 20240922-selftests-sockmap-redir-5d839396c75e Best regards, -- Michal Luczaj <mhal(a)rbox.co>

1 week, 6 days

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