diff options
| author | Tao Chen <chen.dylane@linux.dev> | 2025-07-02 23:39:58 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2025-07-03 19:29:42 -0700 |
| commit | da7e9c0a7fbc5b8552575db16c991e82b7c5fa5c (patch) | |
| tree | 206550d1c85616f77ea29c2298577e71a46e413b | |
| parent | b4dfe26fbf56f7b3e50764268e14b73f1632bfc0 (diff) | |
bpf: Add show_fdinfo for kprobe_multi
Show kprobe_multi link info with fdinfo, the info as follows:
link_type: kprobe_multi
link_id: 1
prog_tag: a69740b9746f7da8
prog_id: 21
kprobe_cnt: 8
missed: 0
cookie func
1 bpf_fentry_test1+0x0/0x20
7 bpf_fentry_test2+0x0/0x20
2 bpf_fentry_test3+0x0/0x20
3 bpf_fentry_test4+0x0/0x20
4 bpf_fentry_test5+0x0/0x20
5 bpf_fentry_test6+0x0/0x20
6 bpf_fentry_test7+0x0/0x20
8 bpf_fentry_test8+0x0/0x10
Signed-off-by: Tao Chen <chen.dylane@linux.dev>
Link: https://lore.kernel.org/r/20250702153958.639852-3-chen.dylane@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| -rw-r--r-- | kernel/trace/bpf_trace.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index b2737642c42a..e7f97a9a8bbd 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -2619,10 +2619,37 @@ static int bpf_kprobe_multi_link_fill_link_info(const struct bpf_link *link, return err; } +#ifdef CONFIG_PROC_FS +static void bpf_kprobe_multi_show_fdinfo(const struct bpf_link *link, + struct seq_file *seq) +{ + struct bpf_kprobe_multi_link *kmulti_link; + + kmulti_link = container_of(link, struct bpf_kprobe_multi_link, link); + + seq_printf(seq, + "kprobe_cnt:\t%u\n" + "missed:\t%lu\n", + kmulti_link->cnt, + kmulti_link->fp.nmissed); + + seq_printf(seq, "%s\t %s\n", "cookie", "func"); + for (int i = 0; i < kmulti_link->cnt; i++) { + seq_printf(seq, + "%llu\t %pS\n", + kmulti_link->cookies[i], + (void *)kmulti_link->addrs[i]); + } +} +#endif + static const struct bpf_link_ops bpf_kprobe_multi_link_lops = { .release = bpf_kprobe_multi_link_release, .dealloc_deferred = bpf_kprobe_multi_link_dealloc, .fill_link_info = bpf_kprobe_multi_link_fill_link_info, +#ifdef CONFIG_PROC_FS + .show_fdinfo = bpf_kprobe_multi_show_fdinfo, +#endif }; static void bpf_kprobe_multi_cookie_swap(void *a, void *b, int size, const void *priv) |