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selftests/bpf: Fix pid check in fexit_sleep test

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bpf_get_current_pid_tgid() returns u64, whose upper 32 bits are the same
as userspace getpid() return value.

Signed-off-by: Yucong Sun <sunyucong@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211006185619.364369-13-fallentree@fb.com
This commit is contained in:
Yucong Sun 2021-10-06 11:56:17 -07:00 committed by Andrii Nakryiko
parent 0f4feacc91
commit 5db02dd7f0
1 changed files with 2 additions and 2 deletions
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4
tools/testing/selftests/bpf/progs/fexit_sleep.c
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@ -13,7 +13,7 @@ int fexit_cnt = 0;
SEC("fentry/__x64_sys_nanosleep") SEC("fentry/__x64_sys_nanosleep")
int BPF_PROG(nanosleep_fentry, const struct pt_regs *regs) int BPF_PROG(nanosleep_fentry, const struct pt_regs *regs)
{ {
if ((int)bpf_get_current_pid_tgid() != pid) if (bpf_get_current_pid_tgid() >> 32 != pid)
return 0; return 0;
fentry_cnt++; fentry_cnt++;
@ -23,7 +23,7 @@ int BPF_PROG(nanosleep_fentry, const struct pt_regs *regs)
SEC("fexit/__x64_sys_nanosleep") SEC("fexit/__x64_sys_nanosleep")
int BPF_PROG(nanosleep_fexit, const struct pt_regs *regs, int ret) int BPF_PROG(nanosleep_fexit, const struct pt_regs *regs, int ret)
{ {
if ((int)bpf_get_current_pid_tgid() != pid) if (bpf_get_current_pid_tgid() >> 32 != pid)
return 0; return 0;
fexit_cnt++; fexit_cnt++;