diff options
| author | Arnaldo Carvalho de Melo <[email protected]> | 2024-09-06 15:37:43 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2024-09-09 19:16:26 -0300 |
| commit | c1632cc5ed386cc8d85693ef578a106f4fb1932c (patch) | |
| tree | 40c2c51e5a59c387382c63f520918fd42683e768 | |
| parent | 003265bb6f028d7bcd7cbd92d6ba2b4e26382796 (diff) | |
perf trace augmented_syscalls.bpf: Move the renameat aumenter to renameat2, temporarily
While trying to shape Howard Chu's generic BPF augmenter transition into
the codebase I got stuck with the renameat2 syscall.
Until I noticed that the attempt at reusing augmenters were making it
use the 'openat' syscall augmenter, that collect just one string syscall
arg, for the 'renameat2' syscall, that takes two strings.
So, for the moment, just to help in this transition period, since
'renameat2' is what is used these days in the 'mv' utility, just make
the BPF collector be associated with the more widely used syscall,
hopefully the transition to Howard's generic BPF augmenter will cure
this, so get this out of the way for now!
So now we still have that odd "reuse", but for something we're not
testing so won't get in the way anymore:
root@number:~# rm -f 987654 ; touch 123456 ; perf trace -vv -e rename* mv 123456 987654 |& grep renameat
Reusing "openat" BPF sys_enter augmenter for "renameat"
0.000 ( 0.079 ms): mv/1158612 renameat2(olddfd: CWD, oldname: "123456", newdfd: CWD, newname: "987654", flags: NOREPLACE) = 0
root@number:~#
Reviewed-by: Ian Rogers <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Howard Chu <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: https://lore.kernel.org/lkml/CAP-5=fXjGYs=tpBgETK-P9U-CuXssytk9pSnTXpfphrmmOydWA@mail.gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c b/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c index 0acbd74e8c76..0f9bd2690d4e 100644 --- a/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c +++ b/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c @@ -260,8 +260,8 @@ int sys_enter_rename(struct syscall_enter_args *args) return augmented__output(args, augmented_args, len); } -SEC("tp/syscalls/sys_enter_renameat") -int sys_enter_renameat(struct syscall_enter_args *args) +SEC("tp/syscalls/sys_enter_renameat2") +int sys_enter_renameat2(struct syscall_enter_args *args) { struct augmented_args_payload *augmented_args = augmented_args_payload(); const void *oldpath_arg = (const void *)args->args[1], |