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

[PATCH][next] bpf, selftests: Fix spelling mistake "tained" -> "tainted"

by Colin Ian King

There appears to be a spelling mistake in a bpf test message. Fix it. Signed-off-by: Colin Ian King <colin.i.king(a)gmail.com> --- tools/testing/selftests/bpf/verifier/value_ptr_arith.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/verifier/value_ptr_arith.c b/tools/testing/selftests/bpf/verifier/value_ptr_arith.c index 4d347bc53aa2..359f3e8f8b60 100644 --- a/tools/testing/selftests/bpf/verifier/value_ptr_arith.c +++ b/tools/testing/selftests/bpf/verifier/value_ptr_arith.c @@ -1078,7 +1078,7 @@ .errstr_unpriv = "R0 pointer -= pointer prohibited", }, { - "map access: trying to leak tained dst reg", + "map access: trying to leak tainted dst reg", .insns = { BPF_MOV64_IMM(BPF_REG_0, 0), BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), -- 2.33.1

3 years, 11 months

2
1
0 0

[PATCH 1/2] kselftest: signal all child processes

by Li Zhijian

We have some many cases that will create child process as well, such as pidfd_wait. Previously, we will signal/kill the parent process when it is time out, but this signal will not be sent to its child process. In such case, if child process doesn't terminate itself, ksefltest framework will hang forever. below ps tree show the situation when ksefltest is blocking: root 1172 0.0 0.0 5996 2500 ? S 07:03 0:00 \_ /bin/bash /lkp/lkp/src/tests/kernel-selftests root 1216 0.0 0.0 4392 1976 ? S 07:03 0:00 \_ make run_tests -C pidfd root 1218 0.0 0.0 2396 1652 ? S 07:03 0:00 \_ /bin/sh -c BASE_DIR="/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests"; . /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/kselftest/runner.sh; if [ "X" != "X" ]; then per_test_logging=1; fi; run_many /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_fdinfo_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_open_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_poll_test /usr/src/perf_selftests-x86_64-rhel- 8. root 12491 0.0 0.0 2396 132 ? S 07:03 0:00 \_ /bin/sh -c BASE_DIR="/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests"; . /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/kselftest/runner.sh; if [ "X" != "X" ]; then per_test_logging=1; fi; run_many /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_fdinfo_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_open_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_poll_test /usr/src/perf_selftests-x86_64-r he root 12492 0.0 0.0 2396 132 ? S 07:03 0:00 \_ /bin/sh -c BASE_DIR="/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests"; . /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/kselftest/runner.sh; if [ "X" != "X" ]; then per_test_logging=1; fi; run_many /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_fdinfo_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_open_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_poll_test /usr/src/perf_selftests-x86_ 64 root 12493 0.0 0.0 2396 132 ? S 07:03 0:00 \_ /bin/sh -c BASE_DIR="/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests"; . /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/kselftest/runner.sh; if [ "X" != "X" ]; then per_test_logging=1; fi; run_many /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_fdinfo_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_open_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_poll_test /usr/src/perf_selftests- x8 root 12496 0.0 0.0 2396 132 ? S 07:03 0:00 \_ /bin/sh -c BASE_DIR="/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests"; . /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/kselftest/runner.sh; if [ "X" != "X" ]; then per_test_logging=1; fi; run_many /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_fdinfo_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_open_test /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/pidfd/pidfd_poll_test /usr/src/perf_selfte st root 12498 0.0 0.0 10564 6116 ? S 07:03 0:00 \_ perl /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-519d81956ee277b4419c723adfb154603c2565ba/tools/testing/selftests/kselftest/prefix.pl root 12503 0.0 0.0 2452 112 ? T 07:03 0:00 ./pidfd_wait root 12621 0.0 0.0 2372 1600 ? SLs 07:04 0:00 /usr/sbin/watchdog root 19438 0.0 0.0 992 60 ? Ss 07:39 0:00 /lkp/lkp/src/bin/event/wakeup activate-monitor Here we group all its child processes so that kill() can signal all of them in timeout. CC: Kees Cook <keescook(a)chromium.org> CC: Andy Lutomirski <luto(a)amacapital.net> CC: Will Drewry <wad(a)chromium.org> CC: Shuah Khan <shuah(a)kernel.org> CC: Christian Brauner <christian(a)brauner.io> CC: Philip Li <philip.li(a)intel.com> Suggested-by: yang xu <xuyang2018.jy(a)cn.fujitsu.com> Signed-off-by: Li Zhijian <lizhijian(a)cn.fujitsu.com> --- tools/testing/selftests/kselftest_harness.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index ae0f0f33b2a6..c7251396e7ee 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -875,7 +875,8 @@ static void __timeout_handler(int sig, siginfo_t *info, void *ucontext) } t->timed_out = true; - kill(t->pid, SIGKILL); + // signal process group + kill(-(t->pid), SIGKILL); } void __wait_for_test(struct __test_metadata *t) @@ -985,6 +986,7 @@ void __run_test(struct __fixture_metadata *f, ksft_print_msg("ERROR SPAWNING TEST CHILD\n"); t->passed = 0; } else if (t->pid == 0) { + setpgrp(); t->fn(t, variant); if (t->skip) _exit(255); -- 2.33.0

3 years, 11 months

4
9
0 0

[PATCH v4 0/7] Documentation: KUnit: Rework KUnit documentation

by Harinder Singh

The KUnit documentation was not very organized. There was little information related to KUnit architecture and the importance of unit testing. Add some new pages, expand and reorganize the existing documentation. Reword pages to make information and style more consistent. Changes since v3: https://lore.kernel.org/linux-kselftest/20211210052812.1998578-1-sharinder@… --Reworded sentences as per comments --Replaced Elixir links with kernel.org links or kernel-doc references Changes since v2: https://lore.kernel.org/linux-kselftest/20211207054019.1455054-1-sharinder@… --Reworded sentences as per comments --Expanded the explaination in usage.rst for accessing the current test example --Standardized on US english in style.rst Changes since v1: https://lore.kernel.org/linux-kselftest/20211203042437.740255-1-sharinder@g… --Fixed spelling mistakes --Restored paragraph about kunit_tool introduction --Added note about CONFIG_KUNIT_ALL_TESTS (Thanks Tim Bird for review comments) -- Miscellaneous changes Harinder Singh (7): Documentation: KUnit: Rewrite main page Documentation: KUnit: Rewrite getting started Documentation: KUnit: Added KUnit Architecture Documentation: kunit: Reorganize documentation related to running tests Documentation: KUnit: Rework writing page to focus on writing tests Documentation: KUnit: Restyle Test Style and Nomenclature page Documentation: KUnit: Restyled Frequently Asked Questions .../dev-tools/kunit/architecture.rst | 204 +++++++ Documentation/dev-tools/kunit/faq.rst | 73 ++- Documentation/dev-tools/kunit/index.rst | 172 +++--- .../kunit/kunit_suitememorydiagram.png | Bin 0 -> 24174 bytes Documentation/dev-tools/kunit/run_manual.rst | 57 ++ Documentation/dev-tools/kunit/run_wrapper.rst | 247 ++++++++ Documentation/dev-tools/kunit/start.rst | 198 +++--- Documentation/dev-tools/kunit/style.rst | 105 ++-- Documentation/dev-tools/kunit/usage.rst | 578 ++++++++---------- 9 files changed, 1047 insertions(+), 587 deletions(-) create mode 100644 Documentation/dev-tools/kunit/architecture.rst create mode 100644 Documentation/dev-tools/kunit/kunit_suitememorydiagram.png create mode 100644 Documentation/dev-tools/kunit/run_manual.rst create mode 100644 Documentation/dev-tools/kunit/run_wrapper.rst base-commit: 4c388a8e740d3235a194f330c8ef327deef710f6 -- 2.34.1.173.g76aa8bc2d0-goog

3 years, 11 months

4
12
0 0

[PATCH v5 0/7] Documentation: KUnit: Rework KUnit documentation

by Harinder Singh

The KUnit documentation was not very organized. There was little information related to KUnit architecture and the importance of unit testing. Add some new pages, expand and reorganize the existing documentation. Reword pages to make information and style more consistent. Changes since v4: https://lore.kernel.org/linux-kselftest/20211216055958.634097-1-sharinder@g… -- Replaced kunit_suitememorydiagram.png with kunit_suitememorydiagram.svg Changes since v3: https://lore.kernel.org/linux-kselftest/20211210052812.1998578-1-sharinder@… --Reworded sentences as per comments --Replaced Elixir links with kernel.org links or kernel-doc references Changes since v2: https://lore.kernel.org/linux-kselftest/20211207054019.1455054-1-sharinder@… --Reworded sentences as per comments --Expanded the explaination in usage.rst for accessing the current test example --Standardized on US english in style.rst Changes since v1: https://lore.kernel.org/linux-kselftest/20211203042437.740255-1-sharinder@g… --Fixed spelling mistakes --Restored paragraph about kunit_tool introduction --Added note about CONFIG_KUNIT_ALL_TESTS (Thanks Tim Bird for review comments) -- Miscellaneous changes Harinder Singh (7): Documentation: KUnit: Rewrite main page Documentation: KUnit: Rewrite getting started Documentation: KUnit: Added KUnit Architecture Documentation: kunit: Reorganize documentation related to running tests Documentation: KUnit: Rework writing page to focus on writing tests Documentation: KUnit: Restyle Test Style and Nomenclature page Documentation: KUnit: Restyled Frequently Asked Questions .../dev-tools/kunit/architecture.rst | 204 +++++++ Documentation/dev-tools/kunit/faq.rst | 73 ++- Documentation/dev-tools/kunit/index.rst | 172 +++--- Documentation/dev-tools/kunit/run_manual.rst | 57 ++ Documentation/dev-tools/kunit/run_wrapper.rst | 247 ++++++++ Documentation/dev-tools/kunit/start.rst | 198 +++--- Documentation/dev-tools/kunit/style.rst | 105 ++-- Documentation/dev-tools/kunit/usage.rst | 578 ++++++++---------- 8 files changed, 1047 insertions(+), 587 deletions(-) create mode 100644 Documentation/dev-tools/kunit/architecture.rst create mode 100644 Documentation/dev-tools/kunit/run_manual.rst create mode 100644 Documentation/dev-tools/kunit/run_wrapper.rst base-commit: 4c388a8e740d3235a194f330c8ef327deef710f6 -- 2.34.1.173.g76aa8bc2d0-goog

3 years, 11 months

1
8
0 0

[PATCH] selftests/bpf: remove ARRAY_SIZE defines from tests

by Shuah Khan

ARRAY_SIZE is defined in multiple test files. Remove the definitions and include header file for the define instead. Remove ARRAY_SIZE define and add include bpf_util.h to bring in the define. Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> --- tools/testing/selftests/bpf/progs/netif_receive_skb.c | 5 +---- tools/testing/selftests/bpf/progs/profiler.inc.h | 5 +---- tools/testing/selftests/bpf/progs/test_sysctl_loop1.c | 5 +---- tools/testing/selftests/bpf/progs/test_sysctl_loop2.c | 4 +--- tools/testing/selftests/bpf/progs/test_sysctl_prog.c | 5 +---- 5 files changed, 5 insertions(+), 19 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/netif_receive_skb.c b/tools/testing/selftests/bpf/progs/netif_receive_skb.c index 1d8918dfbd3f..7a5ebd330689 100644 --- a/tools/testing/selftests/bpf/progs/netif_receive_skb.c +++ b/tools/testing/selftests/bpf/progs/netif_receive_skb.c @@ -5,6 +5,7 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> #include <bpf/bpf_core_read.h> +#include <bpf/bpf_util.h> #include <errno.h> @@ -23,10 +24,6 @@ bool skip = false; #define BADPTR 0 #endif -#ifndef ARRAY_SIZE -#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) -#endif - struct { __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); __uint(max_entries, 1); diff --git a/tools/testing/selftests/bpf/progs/profiler.inc.h b/tools/testing/selftests/bpf/progs/profiler.inc.h index 4896fdf816f7..aad30994ecd7 100644 --- a/tools/testing/selftests/bpf/progs/profiler.inc.h +++ b/tools/testing/selftests/bpf/progs/profiler.inc.h @@ -4,6 +4,7 @@ #include <bpf/bpf_core_read.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> +#include <bpf/bpf_util.h> #include "profiler.h" @@ -132,10 +133,6 @@ struct { __uint(max_entries, 16); } disallowed_exec_inodes SEC(".maps"); -#ifndef ARRAY_SIZE -#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0])) -#endif - static INLINE bool IS_ERR(const void* ptr) { return IS_ERR_VALUE((unsigned long)ptr); diff --git a/tools/testing/selftests/bpf/progs/test_sysctl_loop1.c b/tools/testing/selftests/bpf/progs/test_sysctl_loop1.c index 553a282d816a..c7c512e0af79 100644 --- a/tools/testing/selftests/bpf/progs/test_sysctl_loop1.c +++ b/tools/testing/selftests/bpf/progs/test_sysctl_loop1.c @@ -8,10 +8,7 @@ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> - -#ifndef ARRAY_SIZE -#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) -#endif +#include <bpf/bpf_util.h> /* tcp_mem sysctl has only 3 ints, but this test is doing TCP_MEM_LOOPS */ #define TCP_MEM_LOOPS 28 /* because 30 doesn't fit into 512 bytes of stack */ diff --git a/tools/testing/selftests/bpf/progs/test_sysctl_loop2.c b/tools/testing/selftests/bpf/progs/test_sysctl_loop2.c index 2b64bc563a12..57cda15d0032 100644 --- a/tools/testing/selftests/bpf/progs/test_sysctl_loop2.c +++ b/tools/testing/selftests/bpf/progs/test_sysctl_loop2.c @@ -8,10 +8,8 @@ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> +#include <bpf/bpf_util.h> -#ifndef ARRAY_SIZE -#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) -#endif /* tcp_mem sysctl has only 3 ints, but this test is doing TCP_MEM_LOOPS */ #define TCP_MEM_LOOPS 20 /* because 30 doesn't fit into 512 bytes of stack */ diff --git a/tools/testing/selftests/bpf/progs/test_sysctl_prog.c b/tools/testing/selftests/bpf/progs/test_sysctl_prog.c index 5489823c83fc..6047c39eb457 100644 --- a/tools/testing/selftests/bpf/progs/test_sysctl_prog.c +++ b/tools/testing/selftests/bpf/progs/test_sysctl_prog.c @@ -8,6 +8,7 @@ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> +#include <bpf/bpf_util.h> /* Max supported length of a string with unsigned long in base 10 (pow2 - 1). */ #define MAX_ULONG_STR_LEN 0xF @@ -15,10 +16,6 @@ /* Max supported length of sysctl value string (pow2). */ #define MAX_VALUE_STR_LEN 0x40 -#ifndef ARRAY_SIZE -#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) -#endif - const char tcp_mem_name[] = "net/ipv4/tcp_mem"; static __always_inline int is_tcp_mem(struct bpf_sysctl *ctx) { -- 2.32.0

3 years, 11 months

3
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[PATCH v3] selftests/kselftest/runner.sh: Pass optional command parameters in environment

by Cristian Marussi

Some testcases allow for optional commandline parameters but as of now there is now way to provide such arguments to the runner script. Add support to retrieve such optional command parameters fron environment variables named so as to include the all-uppercase test executable name, sanitized substituting any non-acceptable varname characters with "_", following the pattern: KSELFTEST_<UPPERCASE_SANITIZED_TEST_NAME>_ARGS="options" Optional command parameters support is not available if 'tr' is not installed on the test system. Signed-off-by: Cristian Marussi <cristian.marussi(a)arm.com> --- v2 --> v3 - improved varname sanitation v1 --> v2 - using env vars instead of settings file - added missing varname sanitation Used to configure tests as in: rtctest --> KSELFTEST_RTCTEST_ARGS="/dev/rtc1" cpu-on-off-test.sh --> KSELFTEST_CPU_ON_OFF_TEST_SH_ARGS="-a -p 10" --- tools/testing/selftests/kselftest/runner.sh | 30 ++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kselftest/runner.sh b/tools/testing/selftests/kselftest/runner.sh index a9ba782d8ca0..294619ade49f 100644 --- a/tools/testing/selftests/kselftest/runner.sh +++ b/tools/testing/selftests/kselftest/runner.sh @@ -18,6 +18,8 @@ if [ -z "$BASE_DIR" ]; then exit 1 fi +TR_CMD=$(command -v tr) + # If Perl is unavailable, we must fall back to line-at-a-time prefixing # with sed instead of unbuffered output. tap_prefix() @@ -49,6 +51,31 @@ run_one() # Reset any "settings"-file variables. export kselftest_timeout="$kselftest_default_timeout" + + # Safe default if tr not available + kselftest_cmd_args_ref="KSELFTEST_ARGS" + + # Optional arguments for this command, possibly defined as an + # environment variable built using the test executable in all + # uppercase and sanitized substituting non acceptable shell + # variable name characters with "_" as in: + # + # KSELFTEST_<UPPERCASE_SANITIZED_TESTNAME>_ARGS="<options>" + # + # e.g. + # + # rtctest --> KSELFTEST_RTCTEST_ARGS="/dev/rtc1" + # + # cpu-on-off-test.sh --> KSELFTEST_CPU_ON_OFF_TEST_SH_ARGS="-a -p 10" + # + if [ -n "$TR_CMD" ]; then + BASENAME_SANITIZED=$(echo "$BASENAME_TEST" | \ + $TR_CMD -d "[:blank:][:cntrl:]" | \ + $TR_CMD -c "[:alnum:]_" "_" | \ + $TR_CMD [:lower:] [:upper:]) + kselftest_cmd_args_ref="KSELFTEST_${BASENAME_SANITIZED}_ARGS" + fi + # Load per-test-directory kselftest "settings" file. settings="$BASE_DIR/$DIR/settings" if [ -r "$settings" ] ; then @@ -69,7 +96,8 @@ run_one() echo "# Warning: file $TEST is missing!" echo "not ok $test_num $TEST_HDR_MSG" else - cmd="./$BASENAME_TEST" + eval kselftest_cmd_args="\$${kselftest_cmd_args_ref:-}" + cmd="./$BASENAME_TEST $kselftest_cmd_args" if [ ! -x "$TEST" ]; then echo "# Warning: file $TEST is not executable" -- 2.17.1

3 years, 11 months

1
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[PATCH v2 0/2] livepatch: Allow user to specify functions to search for on a stack

by Miroslav Benes

livepatch's consistency model requires that no live patched function must be found on any task's stack during a transition process after a live patch is applied. It is achieved by walking through stacks of all blocked tasks. The user might also want to define more functions to search for without them being patched at all. It may either help with preparing a live patch, which would otherwise require adding more functions just to achieve the consistency, or it can be used to overcome deficiencies the stack checking inherently has. Consider the following example, in which GCC may optimize function parent() so that a part of it is moved to a different section (child.cold()) and parent() jumps to it. If both parent() and child2() are to patching targets, things can break easily if a task sleeps in child.cold() and new patched child2() changes ABI. parent() is not found on the stack, child.cold() jumps back to parent() eventually and new child2() is called. parent(): /* to-be-patched */ ... jmp child.cold() /* cannot be patched */ ... schedule() ... jmp <back> ... call child2() /* to-be-patched */ ... The patch set adds a new API which allows the user to specify such functions. v1: https://lore.kernel.org/all/20211119090327.12811-1-mbenes@suse.cz/ Changes: -------- v2: - no separate klp_funcs, stack_only attribute is defined - tests rewritten Miroslav Benes (2): livepatch: Allow user to specify functions to search for on a stack selftests/livepatch: Test of the API for specifying functions to search for on a stack include/linux/livepatch.h | 3 + kernel/livepatch/core.c | 28 ++- kernel/livepatch/patch.c | 6 + kernel/livepatch/transition.c | 5 +- lib/livepatch/Makefile | 5 +- lib/livepatch/test_klp_func_stack_only_demo.c | 66 ++++++++ .../test_klp_func_stack_only_demo2.c | 61 +++++++ lib/livepatch/test_klp_func_stack_only_mod.c | 70 ++++++++ tools/testing/selftests/livepatch/Makefile | 3 +- .../livepatch/test-func-stack-only.sh | 159 ++++++++++++++++++ 10 files changed, 402 insertions(+), 4 deletions(-) create mode 100644 lib/livepatch/test_klp_func_stack_only_demo.c create mode 100644 lib/livepatch/test_klp_func_stack_only_demo2.c create mode 100644 lib/livepatch/test_klp_func_stack_only_mod.c create mode 100755 tools/testing/selftests/livepatch/test-func-stack-only.sh -- 2.34.1

3 years, 11 months

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[PATCH v2 0/7] Documentation: KUnit: Rework KUnit documentation

by Harinder Singh

The KUnit documentation was not very organized. There was little information related to KUnit architecture and the importance of unit testing. Add some new pages, expand and reorganize the existing documentation. Reword pages to make information and style more consistent. Changes since v1: https://lore.kernel.org/linux-kselftest/20211203042437.740255-1-sharinder@g… --Fixed spelling mistakes --Restored paragraph about kunit_tool introduction --Added note about CONFIG_KUNIT_ALL_TESTS (Thanks Tim Bird for review comments) -- Miscellaneous changes Harinder Singh (7): Documentation: KUnit: Rewrite main page Documentation: KUnit: Rewrite getting started Documentation: KUnit: Added KUnit Architecture Documentation: kunit: Reorganize documentation related to running tests Documentation: KUnit: Rework writing page to focus on writing tests Documentation: KUnit: Restyle Test Style and Nomenclature page Documentation: KUnit: Restyled Frequently Asked Questions .../dev-tools/kunit/architecture.rst | 206 +++++++ Documentation/dev-tools/kunit/faq.rst | 73 ++- Documentation/dev-tools/kunit/index.rst | 172 +++--- .../kunit/kunit_suitememorydiagram.png | Bin 0 -> 24174 bytes Documentation/dev-tools/kunit/run_manual.rst | 57 ++ Documentation/dev-tools/kunit/run_wrapper.rst | 247 ++++++++ Documentation/dev-tools/kunit/start.rst | 198 +++--- Documentation/dev-tools/kunit/style.rst | 101 ++-- Documentation/dev-tools/kunit/usage.rst | 570 ++++++++---------- 9 files changed, 1039 insertions(+), 585 deletions(-) create mode 100644 Documentation/dev-tools/kunit/architecture.rst create mode 100644 Documentation/dev-tools/kunit/kunit_suitememorydiagram.png create mode 100644 Documentation/dev-tools/kunit/run_manual.rst create mode 100644 Documentation/dev-tools/kunit/run_wrapper.rst base-commit: 4c388a8e740d3235a194f330c8ef327deef710f6 -- 2.34.1.400.ga245620fadb-goog

3 years, 11 months

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[PATCH v3 0/7] Documentation: KUnit: Rework KUnit documentation

by Harinder Singh

The KUnit documentation was not very organized. There was little information related to KUnit architecture and the importance of unit testing. Add some new pages, expand and reorganize the existing documentation. Reword pages to make information and style more consistent. Changes since v2: https://lore.kernel.org/linux-kselftest/20211207054019.1455054-1-sharinder@… --Reworded sentences as per comments --Expanded the explaination in usage.rst for accessing the current test example --Standardized on US english in style.rst Changes since v1: https://lore.kernel.org/linux-kselftest/20211203042437.740255-1-sharinder@g… --Fixed spelling mistakes --Restored paragraph about kunit_tool introduction --Added note about CONFIG_KUNIT_ALL_TESTS (Thanks Tim Bird for review comments) -- Miscellaneous changes Harinder Singh (7): Documentation: KUnit: Rewrite main page Documentation: KUnit: Rewrite getting started Documentation: KUnit: Added KUnit Architecture Documentation: kunit: Reorganize documentation related to running tests Documentation: KUnit: Rework writing page to focus on writing tests Documentation: KUnit: Restyle Test Style and Nomenclature page Documentation: KUnit: Restyled Frequently Asked Questions .../dev-tools/kunit/architecture.rst | 206 +++++++ Documentation/dev-tools/kunit/faq.rst | 73 ++- Documentation/dev-tools/kunit/index.rst | 172 +++--- .../kunit/kunit_suitememorydiagram.png | Bin 0 -> 24174 bytes Documentation/dev-tools/kunit/run_manual.rst | 57 ++ Documentation/dev-tools/kunit/run_wrapper.rst | 247 ++++++++ Documentation/dev-tools/kunit/start.rst | 198 +++--- Documentation/dev-tools/kunit/style.rst | 105 ++-- Documentation/dev-tools/kunit/usage.rst | 578 ++++++++---------- 9 files changed, 1049 insertions(+), 587 deletions(-) create mode 100644 Documentation/dev-tools/kunit/architecture.rst create mode 100644 Documentation/dev-tools/kunit/kunit_suitememorydiagram.png create mode 100644 Documentation/dev-tools/kunit/run_manual.rst create mode 100644 Documentation/dev-tools/kunit/run_wrapper.rst base-commit: 4c388a8e740d3235a194f330c8ef327deef710f6 -- 2.34.1.173.g76aa8bc2d0-goog

3 years, 11 months

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[PATCH v3] kunit: tool: Default --jobs to number of CPUs

by Daniel Latypov

From: David Gow <davidgow(a)google.com> The --jobs parameter for kunit_tool currently defaults to 8 CPUs, regardless of the number available. For systems with significantly more (or less), this is not as efficient. Instead, default --jobs to the number of CPUs available to the process: while there are as many superstitions as to exactly what the ideal jobs:CPU ratio is, this seems sufficiently sensible to me. A new helper function to get the default number of jobs is added: get_default_jobs() -- this is used in kunit_tool_test instead of a hardcoded value, or an explicit call to len(os.sched_getaffinity()), so should be more flexible if this needs to change in the future. Signed-off-by: David Gow <davidgow(a)google.com> Signed-off-by: Daniel Latypov <dlatypov(a)google.com> Reviewed-by: Daniel Latypov <dlatypov(a)google.com> Reviewed-by: Brendan Higgins <brendanhiggins(a)google.com> --- Changes since v2: - Rebased by Daniel Latypov onto linxu-kselftest kunit branch. There was a trivial conflict in kunit_tool_test.py. Changes since v1: https://lore.kernel.org/linux-kselftest/20211211084928.410669-1-davidgow@go… - Use len(os.sched_getaffinity()) instead of os.cpu_count(), which gives the number of available processors (to this process), rather than the total. - Fix kunit_tool_test.py, which had 8 jobs hardcoded in a couple of places. - Thanks to Daniel Latypov for these suggestions. --- tools/testing/kunit/kunit.py | 5 ++++- tools/testing/kunit/kunit_tool_test.py | 5 +++-- 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py index f1be71811369..7a706f96f68d 100755 --- a/tools/testing/kunit/kunit.py +++ b/tools/testing/kunit/kunit.py @@ -282,6 +282,9 @@ def massage_argv(argv: Sequence[str]) -> Sequence[str]: return f'{arg}={pseudo_bool_flag_defaults[arg]}' return list(map(massage_arg, argv)) +def get_default_jobs() -> int: + return len(os.sched_getaffinity(0)) + def add_common_opts(parser) -> None: parser.add_argument('--build_dir', help='As in the make command, it specifies the build ' @@ -332,7 +335,7 @@ def add_build_opts(parser) -> None: parser.add_argument('--jobs', help='As in the make command, "Specifies the number of ' 'jobs (commands) to run simultaneously."', - type=int, default=8, metavar='jobs') + type=int, default=get_default_jobs(), metavar='jobs') def add_exec_opts(parser) -> None: parser.add_argument('--timeout', diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py index b80e333a20cb..352369dffbd9 100755 --- a/tools/testing/kunit/kunit_tool_test.py +++ b/tools/testing/kunit/kunit_tool_test.py @@ -527,7 +527,7 @@ class KUnitMainTest(unittest.TestCase): def test_build_passes_args_pass(self): kunit.main(['build'], self.linux_source_mock) self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1) - self.linux_source_mock.build_kernel.assert_called_once_with(False, 8, '.kunit', None) + self.linux_source_mock.build_kernel.assert_called_once_with(False, kunit.get_default_jobs(), '.kunit', None) self.assertEqual(self.linux_source_mock.run_kernel.call_count, 0) def test_exec_passes_args_pass(self): @@ -633,8 +633,9 @@ class KUnitMainTest(unittest.TestCase): def test_build_builddir(self): build_dir = '.kunit' + jobs = kunit.get_default_jobs() kunit.main(['build', '--build_dir', build_dir], self.linux_source_mock) - self.linux_source_mock.build_kernel.assert_called_once_with(False, 8, build_dir, None) + self.linux_source_mock.build_kernel.assert_called_once_with(False, jobs, build_dir, None) def test_exec_builddir(self): build_dir = '.kunit' base-commit: 1ee2ba89bea86d6389509e426583b49ac19b86f2 -- 2.34.1.173.g76aa8bc2d0-goog

3 years, 11 months

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