mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-29 05:44:11 +00:00
Code Issues Releases Wiki Activity

selftests/bpf: Use nanosleep() syscall instead of sleep() in get_cgroup_id

Browse source 
Glibc's sleep() switched to clock_nanosleep() from nanosleep(), and thus
syscalls:sys_enter_nanosleep tracepoint is not hitting which is causing
testcase failure. Instead of depending on glibc sleep(), call nanosleep()
systemcall directly.

Before:

  # ./get_cgroup_id_user
  ...
  main:FAIL:compare_cgroup_id kern cgid 0 user cgid 483

After:

  # ./get_cgroup_id_user
  ...
  main:PASS:compare_cgroup_id

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210316153048.136447-1-ravi.bangoria@linux.ibm.com
This commit is contained in:
Ravi Bangoria 2021-03-16 21:00:48 +05:30 committed by Daniel Borkmann
parent ebda107e5f
commit 56901d483b
1 changed files with 5 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
tools/testing/selftests/bpf/get_cgroup_id_user.c
View file

@ -57,6 +57,10 @@ int main(int argc, char **argv)
__u32 key = 0, pid;
int exit_code = 1;
char buf[256];
const struct timespec req = {
.tv_sec = 1,
.tv_nsec = 0,
};
cgroup_fd = cgroup_setup_and_join(TEST_CGROUP);
if (CHECK(cgroup_fd < 0, "cgroup_setup_and_join", "err %d errno %d\n", cgroup_fd, errno))
@ -115,7 +119,7 @@ int main(int argc, char **argv)
goto close_pmu;
/* trigger some syscalls */
sleep(1);
syscall(__NR_nanosleep, &req, NULL);
err = bpf_map_lookup_elem(cgidmap_fd, &key, &kcgid);
if (CHECK(err, "bpf_map_lookup_elem", "err %d errno %d\n", err, errno))