June 2022 - Linux-kselftest-mirror

[PATCH MANUALSEL 5.15 2/3] selftests: KVM: Handle compiler optimizations in ucall

by Sasha Levin

From: Raghavendra Rao Ananta <rananta(a)google.com> [ Upstream commit 9e2f6498efbbc880d7caa7935839e682b64fe5a6 ] The selftests, when built with newer versions of clang, is found to have over optimized guests' ucall() function, and eliminating the stores for uc.cmd (perhaps due to no immediate readers). This resulted in the userspace side always reading a value of '0', and causing multiple test failures. As a result, prevent the compiler from optimizing the stores in ucall() with WRITE_ONCE(). Suggested-by: Ricardo Koller <ricarkol(a)google.com> Suggested-by: Reiji Watanabe <reijiw(a)google.com> Signed-off-by: Raghavendra Rao Ananta <rananta(a)google.com> Message-Id: <20220615185706.1099208-1-rananta(a)google.com> Reviewed-by: Andrew Jones <drjones(a)redhat.com> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/kvm/lib/aarch64/ucall.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/kvm/lib/aarch64/ucall.c b/tools/testing/selftests/kvm/lib/aarch64/ucall.c index e0b0164e9af8..be1d9728c4ce 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/ucall.c +++ b/tools/testing/selftests/kvm/lib/aarch64/ucall.c @@ -73,20 +73,19 @@ void ucall_uninit(struct kvm_vm *vm) void ucall(uint64_t cmd, int nargs, ...) { - struct ucall uc = { - .cmd = cmd, - }; + struct ucall uc = {}; va_list va; int i; + WRITE_ONCE(uc.cmd, cmd); nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS; va_start(va, nargs); for (i = 0; i < nargs; ++i) - uc.args[i] = va_arg(va, uint64_t); + WRITE_ONCE(uc.args[i], va_arg(va, uint64_t)); va_end(va); - *ucall_exit_mmio_addr = (vm_vaddr_t)&uc; + WRITE_ONCE(*ucall_exit_mmio_addr, (vm_vaddr_t)&uc); } uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc) -- 2.35.1

3 years

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[PATCH MANUALSEL 5.18 2/3] selftests: KVM: Handle compiler optimizations in ucall

by Sasha Levin

From: Raghavendra Rao Ananta <rananta(a)google.com> [ Upstream commit 9e2f6498efbbc880d7caa7935839e682b64fe5a6 ] The selftests, when built with newer versions of clang, is found to have over optimized guests' ucall() function, and eliminating the stores for uc.cmd (perhaps due to no immediate readers). This resulted in the userspace side always reading a value of '0', and causing multiple test failures. As a result, prevent the compiler from optimizing the stores in ucall() with WRITE_ONCE(). Suggested-by: Ricardo Koller <ricarkol(a)google.com> Suggested-by: Reiji Watanabe <reijiw(a)google.com> Signed-off-by: Raghavendra Rao Ananta <rananta(a)google.com> Message-Id: <20220615185706.1099208-1-rananta(a)google.com> Reviewed-by: Andrew Jones <drjones(a)redhat.com> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/kvm/lib/aarch64/ucall.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/kvm/lib/aarch64/ucall.c b/tools/testing/selftests/kvm/lib/aarch64/ucall.c index e0b0164e9af8..be1d9728c4ce 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/ucall.c +++ b/tools/testing/selftests/kvm/lib/aarch64/ucall.c @@ -73,20 +73,19 @@ void ucall_uninit(struct kvm_vm *vm) void ucall(uint64_t cmd, int nargs, ...) { - struct ucall uc = { - .cmd = cmd, - }; + struct ucall uc = {}; va_list va; int i; + WRITE_ONCE(uc.cmd, cmd); nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS; va_start(va, nargs); for (i = 0; i < nargs; ++i) - uc.args[i] = va_arg(va, uint64_t); + WRITE_ONCE(uc.args[i], va_arg(va, uint64_t)); va_end(va); - *ucall_exit_mmio_addr = (vm_vaddr_t)&uc; + WRITE_ONCE(*ucall_exit_mmio_addr, (vm_vaddr_t)&uc); } uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc) -- 2.35.1

3 years

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[PATCH v14 3/4] selftests/ftrace: Add testcases for objtrace

by Jeff Xie

Add a series of testcases to illustrate correct and incorrect usage of objtrace trigger. Cc: Shuah Khan <shuah(a)kernel.org> Cc: linux-kselftest(a)vger.kernel.org Signed-off-by: Jeff Xie <xiehuan09(a)gmail.com> Tested-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Acked-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> --- .../ftrace/test.d/trigger/trigger-objtrace.tc | 41 +++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc new file mode 100644 index 000000000000..d894442b6a30 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc @@ -0,0 +1,41 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: event trigger - test objtrace-trigger +# requires: kprobe_events "objtrace":README + +fail() { #msg + echo $1 + exit_fail +} + +echo 'p bio_add_page arg1=$arg1 arg2=$arg2' > kprobe_events + +FEATURE=`grep objtrace events/kprobes/p_bio_add_page_0/trigger` +if [ -z "$FEATURE" ]; then + echo "objtrace trigger is not supported" + exit_unsupported +fi + +echo "Test objtrace trigger" +echo 'objtrace:add:arg1,0x28:u32:1 if comm == "cat"' > \ + events/kprobes/p_bio_add_page_0/trigger +if [ -z $? ]; then + fail "objtrace trigger syntax error" +fi + +echo "Test objtrace semantic errors" + +# Being lack of objtrace command +! echo 'objtrace:arg1,0x28:u32:1' > events/kprobes/p_bio_add_page_0/trigger +# Bad parameter name +! echo 'objtrace:add:argx:u32:1' > events/kprobes/p_bio_add_page_0/trigger +# The parameter existed on event +! echo 'objtrace:add:arg2:u32:1' > events/kprobes/p_bio_add_page_0/trigger + +echo "reset objtrace trigger" + +echo '!objtrace:add:arg1,0x28:u32' > \ + events/kprobes/p_bio_add_page_0/trigger +echo '-:p_bio_add_page_0' >> ./kprobe_events + +exit 0 -- 2.25.1

3 years

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[PATCH] Documentation: kunit: eliminate code-block warnings

by Randy Dunlap

Fix Sphinx complaints about code-block directive missing an argument. For start.rst, add "none" since that is already heavily used in that file. For run_wrapper.rst, use the simpler "::" literal block instead. dev-tools/kunit/start.rst:83: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:17: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:23: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:31: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:51: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:57: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:78: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:85: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:109: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:116: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:124: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:139: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. dev-tools/kunit/run_wrapper.rst:162: WARNING: Error in "code-block" directive: 1 argument(s) required, 0 supplied. Fixes: c48b9ef1f794 ("Documentation: KUnit: Rewrite getting started") Fixes: 46201d47d6c4 ("Documentation: kunit: Reorganize documentation related to running tests") Signed-off-by: Randy Dunlap <rdunlap(a)infradead.org> Cc: Brendan Higgins <brendanhiggins(a)google.com> Cc: linux-kselftest(a)vger.kernel.org Cc: kunit-dev(a)googlegroups.com Cc: Jonathan Corbet <corbet(a)lwn.net> Cc: linux-doc(a)vger.kernel.org Cc: Harinder Singh <sharinder(a)google.com> Cc: Tim Bird <tim.bird(a)sony.com> --- Documentation/dev-tools/kunit/run_wrapper.rst | 24 ++++++++-------- Documentation/dev-tools/kunit/start.rst | 2 - 2 files changed, 13 insertions(+), 13 deletions(-) --- linux-next-20220331.orig/Documentation/dev-tools/kunit/run_wrapper.rst +++ linux-next-20220331/Documentation/dev-tools/kunit/run_wrapper.rst @@ -14,13 +14,13 @@ tests, and formats the test results. Run command: -.. code-block:: +:: ./tools/testing/kunit/kunit.py run We should see the following: -.. code-block:: +:: Generating .config... Building KUnit kernel... @@ -28,7 +28,7 @@ We should see the following: We may want to use the following options: -.. code-block:: +:: ./tools/testing/kunit/kunit.py run --timeout=30 --jobs=`nproc --all @@ -48,13 +48,13 @@ test configs for certain subsystems. To use a different ``.kunitconfig`` file (such as one provided to test a particular subsystem), pass it as an option: -.. code-block:: +:: ./tools/testing/kunit/kunit.py run --kunitconfig=fs/ext4/.kunitconfig To view kunit_tool flags (optional command-line arguments), run: -.. code-block:: +:: ./tools/testing/kunit/kunit.py run --help @@ -75,14 +75,14 @@ certain code blocks, arch configs and so To create a ``.kunitconfig``, using the KUnit ``defconfig``: -.. code-block:: +:: cd $PATH_TO_LINUX_REPO cp tools/testing/kunit/configs/default.config .kunit/.kunitconfig We can then add any other Kconfig options. For example: -.. code-block:: +:: CONFIG_LIST_KUNIT_TEST=y @@ -106,14 +106,14 @@ can run part of the KUnit build process When running kunit_tool, from a ``.kunitconfig``, we can generate a ``.config`` by using the ``config`` argument: -.. code-block:: +:: ./tools/testing/kunit/kunit.py config To build a KUnit kernel from the current ``.config``, we can use the ``build`` argument: -.. code-block:: +:: ./tools/testing/kunit/kunit.py build @@ -121,7 +121,7 @@ If we already have built UML kernel with can run the kernel, and display the test results with the ``exec`` argument: -.. code-block:: +:: ./tools/testing/kunit/kunit.py exec @@ -136,7 +136,7 @@ format. When running tests, kunit_tool p a summary. To see the raw test results in TAP format, we can pass the ``--raw_output`` argument: -.. code-block:: +:: ./tools/testing/kunit/kunit.py run --raw_output @@ -159,7 +159,7 @@ By passing a bash style glob filter to t commands, we can run a subset of the tests built into a kernel . For example: if we only want to run KUnit resource tests, use: -.. code-block:: +:: ./tools/testing/kunit/kunit.py run 'kunit-resource*' --- linux-next-20220331.orig/Documentation/dev-tools/kunit/start.rst +++ linux-next-20220331/Documentation/dev-tools/kunit/start.rst @@ -80,7 +80,7 @@ Running Tests (KUnit Wrapper) If everything worked correctly, you should see the following: -.. code-block:: +.. code-block:: none Generating .config ... Building KUnit Kernel ...

3 years

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THIS IS VERY CONFIDENTIAL

by Steve Dibenedetto

Hello, My name is Steve Dibenedetto. I apologize to have contacted you this way without a direct relationship. There is an opportunity to collaborate with me in the sourcing of some materials needed by our company for production of the different medicines we are researching. I'm aware that this might be totally outside your professional specialization, but it will be a great source for generating extra revenue. I discovered a manufacturer who can supply us at a lower rate than our company's previous purchases. I will give you more specific details when/if I receive feedback from you showing interest. Warm Regards Steve Dibenedetto Production & Control Manager, Green Field Laboratories Gothic House, Barker Gate, Nottingham, NG1 1JU, United Kingdom.

3 years

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Prawne zabezpieczenie firmy

by Maciej Kielar

Dzień dobry, czy są Państwo otwarci na rozmowe o współpracy z nasza Kancelarią? Obsługujemy firmy z województwa pomorskiego w zakresie kompleksowego wsparcia prawnego w rozszerzonym zakresie. Dzięki wieloletniej praktyce i współpracy z działalnościami Państwa formatu jestem w stanie wypracować korzystne rozwiązania pod względem podatkowym i organizacyjnym. Możemy się spotkać bądź porozmawiać telefonicznie? Pozdrawiam, Mec. Maciej Kielar

3 years

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[PATCH] selftests/drivers/gpu: Add error messages to drm_mm.sh

by Gautam Menghani

Add error messages when the module test-drm_mm is not found or could not be removed to make tests output more readable. Signed-off-by: Gautam Menghani <gautammenghani201(a)gmail.com> --- tools/testing/selftests/drivers/gpu/drm_mm.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/drivers/gpu/drm_mm.sh b/tools/testing/selftests/drivers/gpu/drm_mm.sh index b789dc8257e6..09c76cd7661d 100755 --- a/tools/testing/selftests/drivers/gpu/drm_mm.sh +++ b/tools/testing/selftests/drivers/gpu/drm_mm.sh @@ -3,7 +3,7 @@ # Runs API tests for struct drm_mm (DRM range manager) if ! /sbin/modprobe -n -q test-drm_mm; then - echo "drivers/gpu/drm_mm: [skip]" + echo "drivers/gpu/drm_mm: module test-drm_mm is not found in /lib/modules/`uname -r` [skip]" exit 77 fi @@ -11,6 +11,6 @@ if /sbin/modprobe -q test-drm_mm; then /sbin/modprobe -q -r test-drm_mm echo "drivers/gpu/drm_mm: ok" else - echo "drivers/gpu/drm_mm: [FAIL]" + echo "drivers/gpu/drm_mm: module test-drm_mm could not be removed [FAIL]" exit 1 fi -- 2.36.1

3 years

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[PATCH bpf-next v2] selftests/bpf: Use bpf_tcp_helpers.h together with vmlinux.h

by Jörn-Thorben Hinz

Hello there, sending a v2 to follow changes now available in master. Should have delayed the first submission. I’m looking for and am happy about feedback with this patch. It enables the usage of bpf_tcp_helpers.h together with vmlinux.h, as briefly discussed here[1]. This makes bpf_tcp_helpers.h reusable for other or external CC implementations that want to use vmlinux.h. After the merge of 6dc7a0baf1a7 ("selftests/bpf: Fix rare segfault in sock_fields prog test"), the below should be observable in the CI: There is currently one failing prog test with this patch: sock_fields. After including vmlinux.h there (for struct tcp_sock), it fails on skeleton-load when verifying egress_read_sock_fields(), around the call of is_loopback6(): ; return !a6[0] && !a6[1] && !a6[2] && a6[3] == bpf_htonl(1); 22: (56) if w2 != 0x0 goto pc-6 ; R2_w=P0 23: (b7) r3 = 28 ; R3_w=P28 24: (bf) r2 = r1 ; R1_w=sock_common(off=0,imm=0) R2_w=sock_common(off=0,imm=0) 25: (0f) r2 += r3 R2 pointer arithmetic on sock_common prohibited Was able to observe this with Clang 13, 14 and trunk/15 (ff5301dde981) and kernel/bpf-next at d4609a5d8c70 so far. The instructions generated for (the inlined call of) is_loopback6() are actually different here after switching to vmlinux.h. I’m still unsure why this is happening. [1] https://lore.kernel.org/bpf/20220614104452.3370148-4-jthinz@mailbox.tu-berl… Patch description: Remove type declarations from bpf_tcp_helpers.h. Modify files using this header accordingly and provide defines that where previously available from the UAPI headers. Also, include bpf_tracing.h or bpf_tracing_net.h instead of bpf_tcp_helpers.h where those are more appropriate. bpf_tcp_helpers.h moves to progs/, the same place as other headers to be included by BPF programs but not by userspace programs. v2: - Rebase on master for recently merged 6e945d57cc9f, 0735627d78ca, and 6dc7a0baf1a7 - Use bpf_tcp_helpers.h + vmlinux.h in recently added tcp_ca_* tests - Avoid redefinition of struct dctcp when it's compiled in Signed-off-by: Jörn-Thorben Hinz <jthinz(a)mailbox.tu-berlin.de> --- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 241 ------------------ tools/testing/selftests/bpf/progs/bpf_cubic.c | 9 +- tools/testing/selftests/bpf/progs/bpf_dctcp.c | 10 +- .../selftests/bpf/progs/bpf_dctcp_release.c | 9 +- .../selftests/bpf/progs/bpf_tc_helpers.h | 7 + .../selftests/bpf/progs/bpf_tcp_helpers.h | 85 ++++++ .../selftests/bpf/progs/bpf_tcp_nogpl.c | 5 +- .../selftests/bpf/progs/bpf_tracing_net.h | 8 + .../bpf/progs/kfunc_call_test_subprog.c | 5 +- .../testing/selftests/bpf/progs/mptcp_sock.c | 7 +- .../selftests/bpf/progs/sockopt_qos_to_cc.c | 7 +- .../bpf/progs/tcp_ca_incompl_cong_ops.c | 7 +- .../bpf/progs/tcp_ca_write_sk_pacing.c | 9 +- .../bpf/progs/test_btf_skc_cls_ingress.c | 14 +- .../selftests/bpf/progs/test_sock_fields.c | 6 +- .../selftests/bpf/progs/test_tcpbpf_kern.c | 23 +- tools/testing/selftests/bpf/progs/timer.c | 2 +- tools/testing/selftests/bpf/progs/timer_mim.c | 2 +- .../selftests/bpf/progs/timer_mim_reject.c | 2 +- 19 files changed, 143 insertions(+), 315 deletions(-) delete mode 100644 tools/testing/selftests/bpf/bpf_tcp_helpers.h create mode 100644 tools/testing/selftests/bpf/progs/bpf_tc_helpers.h create mode 100644 tools/testing/selftests/bpf/progs/bpf_tcp_helpers.h diff --git a/tools/testing/selftests/bpf/bpf_tcp_helpers.h b/tools/testing/selftests/bpf/bpf_tcp_helpers.h deleted file mode 100644 index 82a7c9de95f9..000000000000 --- a/tools/testing/selftests/bpf/bpf_tcp_helpers.h +++ /dev/null @@ -1,241 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef __BPF_TCP_HELPERS_H -#define __BPF_TCP_HELPERS_H - -#include <stdbool.h> -#include <linux/types.h> -#include <bpf/bpf_helpers.h> -#include <bpf/bpf_core_read.h> -#include <bpf/bpf_tracing.h> - -#define BPF_STRUCT_OPS(name, args...) \ -SEC("struct_ops/"#name) \ -BPF_PROG(name, args) - -#ifndef SOL_TCP -#define SOL_TCP 6 -#endif - -#ifndef TCP_CA_NAME_MAX -#define TCP_CA_NAME_MAX 16 -#endif - -#define tcp_jiffies32 ((__u32)bpf_jiffies64()) - -struct sock_common { - unsigned char skc_state; - __u16 skc_num; -} __attribute__((preserve_access_index)); - -enum sk_pacing { - SK_PACING_NONE = 0, - SK_PACING_NEEDED = 1, - SK_PACING_FQ = 2, -}; - -struct sock { - struct sock_common __sk_common; -#define sk_state __sk_common.skc_state - unsigned long sk_pacing_rate; - __u32 sk_pacing_status; /* see enum sk_pacing */ -} __attribute__((preserve_access_index)); - -struct inet_sock { - struct sock sk; -} __attribute__((preserve_access_index)); - -struct inet_connection_sock { - struct inet_sock icsk_inet; - __u8 icsk_ca_state:6, - icsk_ca_setsockopt:1, - icsk_ca_dst_locked:1; - struct { - __u8 pending; - } icsk_ack; - __u64 icsk_ca_priv[104 / sizeof(__u64)]; -} __attribute__((preserve_access_index)); - -struct request_sock { - struct sock_common __req_common; -} __attribute__((preserve_access_index)); - -struct tcp_sock { - struct inet_connection_sock inet_conn; - - __u32 rcv_nxt; - __u32 snd_nxt; - __u32 snd_una; - __u32 window_clamp; - __u8 ecn_flags; - __u32 delivered; - __u32 delivered_ce; - __u32 snd_cwnd; - __u32 snd_cwnd_cnt; - __u32 snd_cwnd_clamp; - __u32 snd_ssthresh; - __u8 syn_data:1, /* SYN includes data */ - syn_fastopen:1, /* SYN includes Fast Open option */ - syn_fastopen_exp:1,/* SYN includes Fast Open exp. option */ - syn_fastopen_ch:1, /* Active TFO re-enabling probe */ - syn_data_acked:1,/* data in SYN is acked by SYN-ACK */ - save_syn:1, /* Save headers of SYN packet */ - is_cwnd_limited:1,/* forward progress limited by snd_cwnd? */ - syn_smc:1; /* SYN includes SMC */ - __u32 max_packets_out; - __u32 lsndtime; - __u32 prior_cwnd; - __u64 tcp_mstamp; /* most recent packet received/sent */ - bool is_mptcp; -} __attribute__((preserve_access_index)); - -static __always_inline struct inet_connection_sock *inet_csk(const struct sock *sk) -{ - return (struct inet_connection_sock *)sk; -} - -static __always_inline void *inet_csk_ca(const struct sock *sk) -{ - return (void *)inet_csk(sk)->icsk_ca_priv; -} - -static __always_inline struct tcp_sock *tcp_sk(const struct sock *sk) -{ - return (struct tcp_sock *)sk; -} - -static __always_inline bool before(__u32 seq1, __u32 seq2) -{ - return (__s32)(seq1-seq2) < 0; -} -#define after(seq2, seq1) before(seq1, seq2) - -#define TCP_ECN_OK 1 -#define TCP_ECN_QUEUE_CWR 2 -#define TCP_ECN_DEMAND_CWR 4 -#define TCP_ECN_SEEN 8 - -enum inet_csk_ack_state_t { - ICSK_ACK_SCHED = 1, - ICSK_ACK_TIMER = 2, - ICSK_ACK_PUSHED = 4, - ICSK_ACK_PUSHED2 = 8, - ICSK_ACK_NOW = 16 /* Send the next ACK immediately (once) */ -}; - -enum tcp_ca_event { - CA_EVENT_TX_START = 0, - CA_EVENT_CWND_RESTART = 1, - CA_EVENT_COMPLETE_CWR = 2, - CA_EVENT_LOSS = 3, - CA_EVENT_ECN_NO_CE = 4, - CA_EVENT_ECN_IS_CE = 5, -}; - -struct ack_sample { - __u32 pkts_acked; - __s32 rtt_us; - __u32 in_flight; -} __attribute__((preserve_access_index)); - -struct rate_sample { - __u64 prior_mstamp; /* starting timestamp for interval */ - __u32 prior_delivered; /* tp->delivered at "prior_mstamp" */ - __s32 delivered; /* number of packets delivered over interval */ - long interval_us; /* time for tp->delivered to incr "delivered" */ - __u32 snd_interval_us; /* snd interval for delivered packets */ - __u32 rcv_interval_us; /* rcv interval for delivered packets */ - long rtt_us; /* RTT of last (S)ACKed packet (or -1) */ - int losses; /* number of packets marked lost upon ACK */ - __u32 acked_sacked; /* number of packets newly (S)ACKed upon ACK */ - __u32 prior_in_flight; /* in flight before this ACK */ - bool is_app_limited; /* is sample from packet with bubble in pipe? */ - bool is_retrans; /* is sample from retransmission? */ - bool is_ack_delayed; /* is this (likely) a delayed ACK? */ -} __attribute__((preserve_access_index)); - -#define TCP_CA_NAME_MAX 16 -#define TCP_CONG_NEEDS_ECN 0x2 - -struct tcp_congestion_ops { - char name[TCP_CA_NAME_MAX]; - __u32 flags; - - /* initialize private data (optional) */ - void (*init)(struct sock *sk); - /* cleanup private data (optional) */ - void (*release)(struct sock *sk); - - /* return slow start threshold (required) */ - __u32 (*ssthresh)(struct sock *sk); - /* do new cwnd calculation (required) */ - void (*cong_avoid)(struct sock *sk, __u32 ack, __u32 acked); - /* call before changing ca_state (optional) */ - void (*set_state)(struct sock *sk, __u8 new_state); - /* call when cwnd event occurs (optional) */ - void (*cwnd_event)(struct sock *sk, enum tcp_ca_event ev); - /* call when ack arrives (optional) */ - void (*in_ack_event)(struct sock *sk, __u32 flags); - /* new value of cwnd after loss (required) */ - __u32 (*undo_cwnd)(struct sock *sk); - /* hook for packet ack accounting (optional) */ - void (*pkts_acked)(struct sock *sk, const struct ack_sample *sample); - /* override sysctl_tcp_min_tso_segs */ - __u32 (*min_tso_segs)(struct sock *sk); - /* returns the multiplier used in tcp_sndbuf_expand (optional) */ - __u32 (*sndbuf_expand)(struct sock *sk); - /* call when packets are delivered to update cwnd and pacing rate, - * after all the ca_state processing. (optional) - */ - void (*cong_control)(struct sock *sk, const struct rate_sample *rs); - void *owner; -}; - -#define min(a, b) ((a) < (b) ? (a) : (b)) -#define max(a, b) ((a) > (b) ? (a) : (b)) -#define min_not_zero(x, y) ({ \ - typeof(x) __x = (x); \ - typeof(y) __y = (y); \ - __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); }) - -static __always_inline bool tcp_in_slow_start(const struct tcp_sock *tp) -{ - return tp->snd_cwnd < tp->snd_ssthresh; -} - -static __always_inline bool tcp_is_cwnd_limited(const struct sock *sk) -{ - const struct tcp_sock *tp = tcp_sk(sk); - - /* If in slow start, ensure cwnd grows to twice what was ACKed. */ - if (tcp_in_slow_start(tp)) - return tp->snd_cwnd < 2 * tp->max_packets_out; - - return !!BPF_CORE_READ_BITFIELD(tp, is_cwnd_limited); -} - -static __always_inline bool tcp_cc_eq(const char *a, const char *b) -{ - int i; - - for (i = 0; i < TCP_CA_NAME_MAX; i++) { - if (a[i] != b[i]) - return false; - if (!a[i]) - break; - } - - return true; -} - -extern __u32 tcp_slow_start(struct tcp_sock *tp, __u32 acked) __ksym; -extern void tcp_cong_avoid_ai(struct tcp_sock *tp, __u32 w, __u32 acked) __ksym; - -struct mptcp_sock { - struct inet_connection_sock sk; - - __u32 token; - struct sock *first; - char ca_name[TCP_CA_NAME_MAX]; -} __attribute__((preserve_access_index)); - -#endif diff --git a/tools/testing/selftests/bpf/progs/bpf_cubic.c b/tools/testing/selftests/bpf/progs/bpf_cubic.c index d9660e7200e2..7759b61be912 100644 --- a/tools/testing/selftests/bpf/progs/bpf_cubic.c +++ b/tools/testing/selftests/bpf/progs/bpf_cubic.c @@ -14,9 +14,12 @@ * "ca->ack_cnt / delta" operation. */ -#include <linux/bpf.h> -#include <linux/stddef.h> -#include <linux/tcp.h> +#define bictcp bictcp___not_used +#include "vmlinux.h" +#undef bictcp + +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> #include "bpf_tcp_helpers.h" char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_dctcp.c b/tools/testing/selftests/bpf/progs/bpf_dctcp.c index 9573be6122be..bd410316b09c 100644 --- a/tools/testing/selftests/bpf/progs/bpf_dctcp.c +++ b/tools/testing/selftests/bpf/progs/bpf_dctcp.c @@ -6,14 +6,14 @@ * the kernel BPF logic. */ -#include <stddef.h> -#include <linux/bpf.h> -#include <linux/types.h> -#include <linux/stddef.h> -#include <linux/tcp.h> +#define dctcp dctcp___not_used +#include "vmlinux.h" +#undef dctcp + #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> #include "bpf_tcp_helpers.h" +#include "bpf_tracing_net.h" char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_dctcp_release.c b/tools/testing/selftests/bpf/progs/bpf_dctcp_release.c index d836f7c372f0..895dd3a3e2b9 100644 --- a/tools/testing/selftests/bpf/progs/bpf_dctcp_release.c +++ b/tools/testing/selftests/bpf/progs/bpf_dctcp_release.c @@ -1,14 +1,11 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2021 Facebook */ -#include <stddef.h> -#include <linux/bpf.h> -#include <linux/types.h> -#include <linux/stddef.h> -#include <linux/tcp.h> +#include "vmlinux.h" + #include <bpf/bpf_helpers.h> -#include <bpf/bpf_tracing.h> #include "bpf_tcp_helpers.h" +#include "bpf_tracing_net.h" char _license[] SEC("license") = "GPL"; const char cubic[] = "cubic"; diff --git a/tools/testing/selftests/bpf/progs/bpf_tc_helpers.h b/tools/testing/selftests/bpf/progs/bpf_tc_helpers.h new file mode 100644 index 000000000000..fef72cba6298 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_tc_helpers.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __BPF_TC_HELPERS_H +#define __BPF_TC_HELPERS_H + +#define TC_ACT_OK 0 + +#endif diff --git a/tools/testing/selftests/bpf/progs/bpf_tcp_helpers.h b/tools/testing/selftests/bpf/progs/bpf_tcp_helpers.h new file mode 100644 index 000000000000..a8659fed2c18 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_tcp_helpers.h @@ -0,0 +1,85 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __BPF_TCP_HELPERS_H +#define __BPF_TCP_HELPERS_H + +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_core_read.h> +#include <bpf/bpf_tracing.h> + +#include "bpf_tracing_net.h" + +#define BPF_STRUCT_OPS(name, args...) \ +SEC("struct_ops/"#name) \ +BPF_PROG(name, args) + +#define tcp_jiffies32 ((__u32)bpf_jiffies64()) + +static __always_inline struct inet_connection_sock *inet_csk(const struct sock *sk) +{ + return (struct inet_connection_sock *)sk; +} + +static __always_inline void *inet_csk_ca(const struct sock *sk) +{ + return (void *)inet_csk(sk)->icsk_ca_priv; +} + +static __always_inline struct tcp_sock *tcp_sk(const struct sock *sk) +{ + return (struct tcp_sock *)sk; +} + +static __always_inline bool before(__u32 seq1, __u32 seq2) +{ + return (__s32)(seq1-seq2) < 0; +} +#define after(seq2, seq1) before(seq1, seq2) + +#define TCP_ECN_OK 1 +#define TCP_ECN_QUEUE_CWR 2 +#define TCP_ECN_DEMAND_CWR 4 +#define TCP_ECN_SEEN 8 + +#define TCP_CONG_NEEDS_ECN 0x2 + +#define min(a, b) ((a) < (b) ? (a) : (b)) +#define max(a, b) ((a) > (b) ? (a) : (b)) +#define min_not_zero(x, y) ({ \ + typeof(x) __x = (x); \ + typeof(y) __y = (y); \ + __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); }) + +static __always_inline bool tcp_in_slow_start(const struct tcp_sock *tp) +{ + return tp->snd_cwnd < tp->snd_ssthresh; +} + +static __always_inline bool tcp_is_cwnd_limited(const struct sock *sk) +{ + const struct tcp_sock *tp = tcp_sk(sk); + + /* If in slow start, ensure cwnd grows to twice what was ACKed. */ + if (tcp_in_slow_start(tp)) + return tp->snd_cwnd < 2 * tp->max_packets_out; + + return !!BPF_CORE_READ_BITFIELD(tp, is_cwnd_limited); +} + +static __always_inline bool tcp_cc_eq(const char *a, const char *b) +{ + int i; + + for (i = 0; i < TCP_CA_NAME_MAX; i++) { + if (a[i] != b[i]) + return false; + if (!a[i]) + break; + } + + return true; +} + +extern __u32 tcp_slow_start(struct tcp_sock *tp, __u32 acked) __ksym; +extern void tcp_cong_avoid_ai(struct tcp_sock *tp, __u32 w, __u32 acked) __ksym; + +#endif diff --git a/tools/testing/selftests/bpf/progs/bpf_tcp_nogpl.c b/tools/testing/selftests/bpf/progs/bpf_tcp_nogpl.c index 2ecd833dcd41..3734d49ccba9 100644 --- a/tools/testing/selftests/bpf/progs/bpf_tcp_nogpl.c +++ b/tools/testing/selftests/bpf/progs/bpf_tcp_nogpl.c @@ -1,9 +1,8 @@ // SPDX-License-Identifier: GPL-2.0 -#include <linux/bpf.h> -#include <linux/types.h> +#include "vmlinux.h" + #include <bpf/bpf_helpers.h> -#include <bpf/bpf_tracing.h> #include "bpf_tcp_helpers.h" char _license[] SEC("license") = "X"; diff --git a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h index 1c1289ba5fc5..f06410392efc 100644 --- a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h +++ b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h @@ -2,16 +2,24 @@ #ifndef __BPF_TRACING_NET_H__ #define __BPF_TRACING_NET_H__ +#define ETH_P_IPV6 0x86DD + #define AF_INET 2 #define AF_INET6 10 +#define SOL_IPV6 41 +#define IPV6_TCLASS 67 + #define SOL_SOCKET 1 #define SO_SNDBUF 7 #define __SO_ACCEPTCON (1 << 16) #define SOL_TCP 6 +#define TCP_WINDOW_CLAMP 10 #define TCP_CONGESTION 13 #define TCP_CA_NAME_MAX 16 +#define TCP_SAVE_SYN 27 +#define TCP_SAVED_SYN 28 #define ICSK_TIME_RETRANS 1 #define ICSK_TIME_PROBE0 3 diff --git a/tools/testing/selftests/bpf/progs/kfunc_call_test_subprog.c b/tools/testing/selftests/bpf/progs/kfunc_call_test_subprog.c index c1fdecabeabf..ce34ac85a378 100644 --- a/tools/testing/selftests/bpf/progs/kfunc_call_test_subprog.c +++ b/tools/testing/selftests/bpf/progs/kfunc_call_test_subprog.c @@ -1,8 +1,9 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2021 Facebook */ -#include <linux/bpf.h> +#include "vmlinux.h" + #include <bpf/bpf_helpers.h> -#include "bpf_tcp_helpers.h" +#include "bpf_tracing_net.h" extern const int bpf_prog_active __ksym; extern __u64 bpf_kfunc_call_test1(struct sock *sk, __u32 a, __u64 b, diff --git a/tools/testing/selftests/bpf/progs/mptcp_sock.c b/tools/testing/selftests/bpf/progs/mptcp_sock.c index 91a0d7eff2ac..b7a861b948b3 100644 --- a/tools/testing/selftests/bpf/progs/mptcp_sock.c +++ b/tools/testing/selftests/bpf/progs/mptcp_sock.c @@ -2,9 +2,12 @@ /* Copyright (c) 2020, Tessares SA. */ /* Copyright (c) 2022, SUSE. */ -#include <linux/bpf.h> +#include "vmlinux.h" + +#include <bpf/bpf_core_read.h> #include <bpf/bpf_helpers.h> -#include "bpf_tcp_helpers.h" +#include <bpf/bpf_tracing.h> +#include "bpf_tracing_net.h" char _license[] SEC("license") = "GPL"; __u32 token = 0; diff --git a/tools/testing/selftests/bpf/progs/sockopt_qos_to_cc.c b/tools/testing/selftests/bpf/progs/sockopt_qos_to_cc.c index 1bce83b6e3a7..ca712362cfe7 100644 --- a/tools/testing/selftests/bpf/progs/sockopt_qos_to_cc.c +++ b/tools/testing/selftests/bpf/progs/sockopt_qos_to_cc.c @@ -1,11 +1,10 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2021 Facebook */ -#include <string.h> -#include <linux/tcp.h> -#include <netinet/in.h> -#include <linux/bpf.h> +#include "vmlinux.h" + #include <bpf/bpf_helpers.h> #include "bpf_tcp_helpers.h" +#include "bpf_tracing_net.h" char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/tcp_ca_incompl_cong_ops.c b/tools/testing/selftests/bpf/progs/tcp_ca_incompl_cong_ops.c index 7bb872fb22dd..e3e523dc2822 100644 --- a/tools/testing/selftests/bpf/progs/tcp_ca_incompl_cong_ops.c +++ b/tools/testing/selftests/bpf/progs/tcp_ca_incompl_cong_ops.c @@ -2,16 +2,13 @@ #include "vmlinux.h" +#include "bpf_tcp_helpers.h" + #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> char _license[] SEC("license") = "GPL"; -static inline struct tcp_sock *tcp_sk(const struct sock *sk) -{ - return (struct tcp_sock *)sk; -} - SEC("struct_ops/incompl_cong_ops_ssthresh") __u32 BPF_PROG(incompl_cong_ops_ssthresh, struct sock *sk) { diff --git a/tools/testing/selftests/bpf/progs/tcp_ca_write_sk_pacing.c b/tools/testing/selftests/bpf/progs/tcp_ca_write_sk_pacing.c index 43447704cf0e..dfd01deb1ed7 100644 --- a/tools/testing/selftests/bpf/progs/tcp_ca_write_sk_pacing.c +++ b/tools/testing/selftests/bpf/progs/tcp_ca_write_sk_pacing.c @@ -2,6 +2,8 @@ #include "vmlinux.h" +#include "bpf_tcp_helpers.h" + #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> @@ -9,13 +11,6 @@ char _license[] SEC("license") = "GPL"; #define USEC_PER_SEC 1000000UL -#define min(a, b) ((a) < (b) ? (a) : (b)) - -static inline struct tcp_sock *tcp_sk(const struct sock *sk) -{ - return (struct tcp_sock *)sk; -} - SEC("struct_ops/write_sk_pacing_init") void BPF_PROG(write_sk_pacing_init, struct sock *sk) { diff --git a/tools/testing/selftests/bpf/progs/test_btf_skc_cls_ingress.c b/tools/testing/selftests/bpf/progs/test_btf_skc_cls_ingress.c index e2bea4da194b..72c20d40468b 100644 --- a/tools/testing/selftests/bpf/progs/test_btf_skc_cls_ingress.c +++ b/tools/testing/selftests/bpf/progs/test_btf_skc_cls_ingress.c @@ -1,19 +1,13 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2020 Facebook */ -#include <string.h> -#include <errno.h> -#include <netinet/in.h> -#include <linux/stddef.h> -#include <linux/bpf.h> -#include <linux/ipv6.h> -#include <linux/tcp.h> -#include <linux/if_ether.h> -#include <linux/pkt_cls.h> +#include "vmlinux.h" +#include <errno.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> -#include "bpf_tcp_helpers.h" +#include "bpf_tc_helpers.h" +#include "bpf_tracing_net.h" struct sockaddr_in6 srv_sa6 = {}; __u16 listen_tp_sport = 0; diff --git a/tools/testing/selftests/bpf/progs/test_sock_fields.c b/tools/testing/selftests/bpf/progs/test_sock_fields.c index 9f4b8f9f1181..d9ee861061aa 100644 --- a/tools/testing/selftests/bpf/progs/test_sock_fields.c +++ b/tools/testing/selftests/bpf/progs/test_sock_fields.c @@ -1,13 +1,11 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2019 Facebook */ -#include <linux/bpf.h> -#include <netinet/in.h> -#include <stdbool.h> +#include "vmlinux.h" #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> -#include "bpf_tcp_helpers.h" +#include "bpf_tracing_net.h" enum bpf_linum_array_idx { EGRESS_LINUM_IDX, diff --git a/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c b/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c index 3ded05280757..5315a1ec06a2 100644 --- a/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c +++ b/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c @@ -1,30 +1,13 @@ // SPDX-License-Identifier: GPL-2.0 -#include <stddef.h> -#include <string.h> -#include <netinet/in.h> -#include <linux/bpf.h> -#include <linux/if_ether.h> -#include <linux/if_packet.h> -#include <linux/ip.h> -#include <linux/ipv6.h> -#include <linux/types.h> -#include <linux/socket.h> -#include <linux/tcp.h> +#include "vmlinux.h" + #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> -#include "bpf_tcp_helpers.h" +#include "bpf_tracing_net.h" #include "test_tcpbpf.h" struct tcpbpf_globals global = {}; -/** - * SOL_TCP is defined in <netinet/tcp.h> while - * TCP_SAVED_SYN is defined in already included <linux/tcp.h> - */ -#ifndef SOL_TCP -#define SOL_TCP 6 -#endif - static __always_inline int get_tp_window_clamp(struct bpf_sock_ops *skops) { struct bpf_sock *sk; diff --git a/tools/testing/selftests/bpf/progs/timer.c b/tools/testing/selftests/bpf/progs/timer.c index 5f5309791649..c2aa74aef4e0 100644 --- a/tools/testing/selftests/bpf/progs/timer.c +++ b/tools/testing/selftests/bpf/progs/timer.c @@ -4,7 +4,7 @@ #include <time.h> #include <errno.h> #include <bpf/bpf_helpers.h> -#include "bpf_tcp_helpers.h" +#include <bpf/bpf_tracing.h> char _license[] SEC("license") = "GPL"; struct hmap_elem { diff --git a/tools/testing/selftests/bpf/progs/timer_mim.c b/tools/testing/selftests/bpf/progs/timer_mim.c index 2fee7ab105ef..50ebc3f68522 100644 --- a/tools/testing/selftests/bpf/progs/timer_mim.c +++ b/tools/testing/selftests/bpf/progs/timer_mim.c @@ -4,7 +4,7 @@ #include <time.h> #include <errno.h> #include <bpf/bpf_helpers.h> -#include "bpf_tcp_helpers.h" +#include <bpf/bpf_tracing.h> char _license[] SEC("license") = "GPL"; struct hmap_elem { diff --git a/tools/testing/selftests/bpf/progs/timer_mim_reject.c b/tools/testing/selftests/bpf/progs/timer_mim_reject.c index 5d648e3d8a41..dd3f1ed6d6e6 100644 --- a/tools/testing/selftests/bpf/progs/timer_mim_reject.c +++ b/tools/testing/selftests/bpf/progs/timer_mim_reject.c @@ -4,7 +4,7 @@ #include <time.h> #include <errno.h> #include <bpf/bpf_helpers.h> -#include "bpf_tcp_helpers.h" +#include <bpf/bpf_tracing.h> char _license[] SEC("license") = "GPL"; struct hmap_elem { -- 2.30.2

3 years

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Re: [PATCH v4] kselftests/damon: add support for cases where debugfs cannot be read

by Gautam Menghani

Cc'ing everyone as I forgot to group reply before. Also, I have included the example outputs in this reply. On Tue, Jun 28, 2022 at 12:12:15AM +0530, Gautam Menghani wrote: > On Mon, Jun 27, 2022 at 11:00:18AM -0600, Shuah Khan wrote: > > On 6/25/22 2:03 PM, SeongJae Park wrote: > > > Hi Gautam, > > > > > > On Sun, 26 Jun 2022 01:22:45 +0530 Gautam <gautammenghani201(a)gmail.com> wrote: > > > > > > > The kernel is in lockdown mode when secureboot is enabled and hence > > > > debugfs cannot be used. Add support for this and other general cases > > > > where debugfs cannot be read and communicate the same to the user before > > > > running tests. > > > > > > > > Signed-off-by: Gautam <gautammenghani201(a)gmail.com> > > > > > > Reviewed-by: SeongJae Park <sj(a)kernel.org> > > > > > > > > > Thanks, > > > SJ > > > > > > > --- > > > > Changes in v2: > > > > 1. Modify the error message to account for general cases. > > > > 2. Change the return code so that the test is skipped. > > > > > > > > Changes in v3: > > > > 1. Change the name of variable holding the error message. > > > > > > > > Changes in v4: > > > > 1. Correct the mode of the source file. > > > > > > > > tools/testing/selftests/damon/_chk_dependency.sh | 10 ++++++++++ > > > > 1 file changed, 10 insertions(+) > > > > > > > > diff --git a/tools/testing/selftests/damon/_chk_dependency.sh b/tools/testing/selftests/damon/_chk_dependency.sh > > > > index 0189db81550b..0328ac0b5a5e 100644 > > > > --- a/tools/testing/selftests/damon/_chk_dependency.sh > > > > +++ b/tools/testing/selftests/damon/_chk_dependency.sh > > > > @@ -26,3 +26,13 @@ do > > > > exit 1 > > > > fi > > > > done > > > > + > > > > +permission_error="Operation not permitted" > > > > +for f in attrs target_ids monitor_on > > > > +do > > > > + status=$( cat "$DBGFS/$f" 2>&1 ) > > > > + if [ "${status#*$permission_error}" != "$status" ]; then > > > > + echo "Permission for reading $DBGFS/$f denied; maybe secureboot enabled?" > > > > btw - does this run as a regular user or does it need root privilege? > > If so add a test for that and skip with a message. > > Yes this condition is reachable only with root user. If damon tests are run > as regular user, the root check condition already skips the tests. > > Tests output as regular user: > +TAP version 13 > +1..6 > +# selftests: damon: debugfs_attrs.sh > +# Run as root > +ok 1 selftests: damon: debugfs_attrs.sh # SKIP > +# selftests: damon: debugfs_schemes.sh > +# Run as root > > Tests output as root user: > +TAP version 13 > +1..6 > +# selftests: damon: debugfs_attrs.sh > +# Permission for reading /sys/kernel/debug/damon/attrs denied; maybe secureboot enabled? > +ok 1 selftests: damon: debugfs_attrs.sh # SKIP > +# selftests: damon: debugfs_schemes.sh > +# Permission for reading /sys/kernel/debug/damon/attrs denied; maybe secureboot enabled? > > Is any change needed in this patch? > > > > > + exit $ksft_skip > > > > + fi > > > > +done > > > > -- > > > > 2.36.1 > > > > > thanks, > > -- Shuah

3 years

1
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[PATCH AUTOSEL 5.15 11/41] selftests: vm: Fix resource leak when return error

by Sasha Levin

From: Ding Xiang <dingxiang(a)cmss.chinamobile.com> [ Upstream commit 3084a4ec7f9bb1ec90036cfd01b1abadc5dd4fb2 ] When return on an error path, file handle need to be closed to prevent resource leak Signed-off-by: Ding Xiang <dingxiang(a)cmss.chinamobile.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/vm/ksm_tests.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/vm/ksm_tests.c b/tools/testing/selftests/vm/ksm_tests.c index b61dcdb44c5b..b31f7a17d92a 100644 --- a/tools/testing/selftests/vm/ksm_tests.c +++ b/tools/testing/selftests/vm/ksm_tests.c @@ -48,6 +48,7 @@ static int ksm_write_sysfs(const char *file_path, unsigned long val) } if (fprintf(f, "%lu", val) < 0) { perror("fprintf"); + fclose(f); return 1; } fclose(f); @@ -66,6 +67,7 @@ static int ksm_read_sysfs(const char *file_path, unsigned long *val) } if (fscanf(f, "%lu", val) != 1) { perror("fscanf"); + fclose(f); return 1; } fclose(f); -- 2.35.1

3 years

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