Linux-kselftest-mirror July 2023

linux-kselftest-mirror@lists.linaro.org

201 participants
283 discussions

[PATCH v2 00/13] nolibc: add part2 of support for rv32

by Zhangjin Wu

Hi, all Thanks very much for your review suggestions of the v1 series [1], we just sent out the generic part1 [2], and here is the part2 of the whole v2 revision. Changes from v1 -> v2: * Don't emulate the return values in the new syscalls path, fix up or support the new syscalls in the side of the related test cases (1-3) selftests/nolibc: remove gettimeofday_bad1/2 completely selftests/nolibc: support two errnos with EXPECT_SYSER2() selftests/nolibc: waitpid_min: add waitid syscall support (Review suggestions from Willy and Thomas) * Fix up new failure of the state_timestamps test case (4, new) tools/nolibc: add missing nanoseconds support for __NR_statx (Fixes for the commit a89c937d781a ("tools/nolibc: support nanoseconds in stat()") * Add new waitstatus macros as a standalone patch for the waitid support (5) tools/nolibc: add more wait status related types (Split and Cleanup for the waitid syscall based sys_wait4) * Pure 64bit lseek and time64 select/poll/gettimeofday support (6-11) tools/nolibc: add pure 64bit off_t, time_t and blkcnt_t tools/nolibc: sys_lseek: add pure 64bit lseek tools/nolibc: add pure 64bit time structs tools/nolibc: sys_select: add pure 64bit select tools/nolibc: sys_poll: add pure 64bit poll tools/nolibc: sys_gettimeofday: add pure 64bit gettimeofday (Review suggestions from Arnd, Thomas and Willy, time32 variants have been removed completely and some fixups) * waitid syscall support cleanup (12) tools/nolibc: sys_wait4: add waitid syscall support (Sync with the waitstatus macros update and Removal of emulated code) * rv32 nolibc-test support, commit message update (13) selftests/nolibc: riscv: customize makefile for rv32 (Review suggestions from Thomas, explain more about the change logic in commit message) Best regards, Zhangjin --- [1]: https://lore.kernel.org/linux-riscv/20230529113143.GB2762@1wt.eu/T/#t [2]: https://lore.kernel.org/linux-riscv/cover.1685362482.git.falcon@tinylab.org/ Zhangjin Wu (13): selftests/nolibc: remove gettimeofday_bad1/2 completely selftests/nolibc: support two errnos with EXPECT_SYSER2() selftests/nolibc: waitpid_min: add waitid syscall support tools/nolibc: add missing nanoseconds support for __NR_statx tools/nolibc: add more wait status related types tools/nolibc: add pure 64bit off_t, time_t and blkcnt_t tools/nolibc: sys_lseek: add pure 64bit lseek tools/nolibc: add pure 64bit time structs tools/nolibc: sys_select: add pure 64bit select tools/nolibc: sys_poll: add pure 64bit poll tools/nolibc: sys_gettimeofday: add pure 64bit gettimeofday tools/nolibc: sys_wait4: add waitid syscall support selftests/nolibc: riscv: customize makefile for rv32 tools/include/nolibc/arch-aarch64.h | 3 - tools/include/nolibc/arch-loongarch.h | 3 - tools/include/nolibc/arch-riscv.h | 3 - tools/include/nolibc/std.h | 28 ++-- tools/include/nolibc/sys.h | 134 +++++++++++++++---- tools/include/nolibc/types.h | 58 +++++++- tools/testing/selftests/nolibc/Makefile | 11 +- tools/testing/selftests/nolibc/nolibc-test.c | 20 +-- 8 files changed, 202 insertions(+), 58 deletions(-) -- 2.25.1

1 year, 5 months

[PATCH 0/2] v3: F_OFD_GETLK extension to read lock info

by Stas Sergeev

This extension allows to use F_UNLCK on query, which currently returns EINVAL. Instead it can be used to query the locks on a particular fd - something that is not currently possible. The basic idea is that on F_OFD_GETLK, F_UNLCK would "conflict" with (or query) any types of the lock on the same fd, and ignore any locks on other fds. Use-cases: 1. CRIU-alike scenario when you want to read the locking info from an fd for the later reconstruction. This can now be done by setting l_start and l_len to 0 to cover entire file range, and do F_OFD_GETLK. In the loop you need to advance l_start past the returned lock ranges, to eventually collect all locked ranges. 2. Implementing the lock checking/enforcing policy. Say you want to implement an "auditor" module in your program, that checks that the I/O is done only after the proper locking is applied on a file region. In this case you need to know if the particular region is locked on that fd, and if so - with what type of the lock. If you would do that currently (without this extension) then you can only check for the write locks, and for that you need to probe the lock on your fd and then open the same file via another fd and probe there. That way you can identify the write lock on a particular fd, but such trick is non-atomic and complex. As for finding out the read lock on a particular fd - impossible. This extension allows to do such queries without any extra efforts. 3. Implementing the mandatory locking policy. Suppose you want to make a policy where the write lock inhibits any unlocked readers and writers. Currently you need to check if the write lock is present on some other fd, and if it is not there - allow the I/O operation. But because the write lock can appear at any moment, you need to do that under some global lock, which can be released only when the I/O operation is finished. With the proposed extension you can instead just check the write lock on your own fd first, and if it is there - allow the I/O operation on that fd without using any global lock. Only if there is no write lock on this fd, then you need to take global lock and check for a write lock on other fds. The second patch adds a test-case for OFD locks. It tests both the generic things and the proposed extension. The third patch is a proposed man page update for fcntl(2) (not for the linux source tree) Changes in v3: - Move selftest to selftests/filelock Changes in v2: - Dropped the l_pid extension patch and updated test-case accordingly. Stas Sergeev (2): fs/locks: F_UNLCK extension for F_OFD_GETLK selftests: add OFD lock tests fs/locks.c | 23 +++- tools/testing/selftests/filelock/Makefile | 5 + tools/testing/selftests/filelock/ofdlocks.c | 132 ++++++++++++++++++++ 3 files changed, 157 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/filelock/Makefile create mode 100644 tools/testing/selftests/filelock/ofdlocks.c CC: Jeff Layton <jlayton(a)kernel.org> CC: Chuck Lever <chuck.lever(a)oracle.com> CC: Alexander Viro <viro(a)zeniv.linux.org.uk> CC: Christian Brauner <brauner(a)kernel.org> CC: linux-fsdevel(a)vger.kernel.org CC: linux-kernel(a)vger.kernel.org CC: Shuah Khan <shuah(a)kernel.org> CC: linux-kselftest(a)vger.kernel.org CC: linux-api(a)vger.kernel.org -- 2.39.2

1 year, 5 months

[PATCH -next] selftests/ptrace: Fix Test terminated by timeout in ptrace_attach

by limin

That is an open issue Bernd Edlinger wrote the test case in anticipation that all of patch series got accepted,but the last patch was not picked up for inclusion in the linux kernel. How to reproduce warning: $ make -C tools/testing/selftests TARGETS=ptrace run_tests Example vmaccess from 6.1.0-next source tree run fail on bare metal RUN global.attach ... attach: Test terminated by timeout FAIL global.attach Link:https://lore.kernel.org/all/AM8PR10MB4708E6FF0E155261455064C2E4209@AM8… Fixes: 2de4e82318c7 ("selftests/ptrace: add test cases for dead-locks") Signed-off-by: limin <limin100(a)huawei.com> --- tools/testing/selftests/ptrace/vmaccess.c | 37 ++++++++--------------- 1 file changed, 13 insertions(+), 24 deletions(-) diff --git a/tools/testing/selftests/ptrace/vmaccess.c b/tools/testing/selftests/ptrace/vmaccess.c index 4db327b44586..751a41f1163c 100644 --- a/tools/testing/selftests/ptrace/vmaccess.c +++ b/tools/testing/selftests/ptrace/vmaccess.c @@ -45,42 +45,31 @@ TEST(vmaccess) TEST(attach) { - int s, k, pid = fork(); + int k; + int s; + pid_t pid = fork(); if (!pid) { - pthread_t pt; - - pthread_create(&pt, NULL, thread, NULL); - pthread_join(pt, NULL); + ptrace(PTRACE_TRACEME, 0, NULL, NULL); execlp("sleep", "sleep", "2", NULL); } sleep(1); k = ptrace(PTRACE_ATTACH, pid, 0L, 0L); - ASSERT_EQ(errno, EAGAIN); + printf("k1:%d\n", k); + ASSERT_EQ(k, -1); + waitpid(pid, &s, WNOHANG); ASSERT_EQ(k, -1); - k = waitpid(-1, &s, WNOHANG); - ASSERT_NE(k, -1); ASSERT_NE(k, 0); ASSERT_NE(k, pid); - ASSERT_EQ(WIFEXITED(s), 1); - ASSERT_EQ(WEXITSTATUS(s), 0); - sleep(1); - k = ptrace(PTRACE_ATTACH, pid, 0L, 0L); - ASSERT_EQ(k, 0); - k = waitpid(-1, &s, 0); - ASSERT_EQ(k, pid); + if (WIFEXITED(s)) + ASSERT_EQ(WEXITSTATUS(s), 0); + if (WIFSTOPPED(s)) + ASSERT_EQ(WSTOPSIG(s), SIGTRAP); ASSERT_EQ(WIFSTOPPED(s), 1); - ASSERT_EQ(WSTOPSIG(s), SIGSTOP); - k = ptrace(PTRACE_DETACH, pid, 0L, 0L); - ASSERT_EQ(k, 0); - k = waitpid(-1, &s, 0); - ASSERT_EQ(k, pid); - ASSERT_EQ(WIFEXITED(s), 1); - ASSERT_EQ(WEXITSTATUS(s), 0); - k = waitpid(-1, NULL, 0); + sleep(1); + ptrace(PTRACE_CONT, pid, NULL, NULL); ASSERT_EQ(k, -1); - ASSERT_EQ(errno, ECHILD); } TEST_HARNESS_MAIN -- 2.33.0

1 year, 5 months

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Linux-kselftest-mirror July 2023