From aa4f5fbcaaf8a41bce44a97ef4e2a05c8170eb95 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Wed, 20 Sep 2023 23:31:41 +0200 Subject: bpftool: Display missed count for kprobe_multi link Adding 'missed' field to display missed counts for kprobes attached by kprobe multi link, like: # bpftool link 5: kprobe_multi prog 76 kprobe.multi func_cnt 1 missed 1 addr func [module] ffffffffa039c030 fp3_test [fprobe_test] # bpftool link -jp [{ "id": 5, "type": "kprobe_multi", "prog_id": 76, "retprobe": false, "func_cnt": 1, "missed": 1, "funcs": [{ "addr": 18446744072102723632, "func": "fp3_test", "module": "fprobe_test" } ] } ] Signed-off-by: Jiri Olsa Signed-off-by: Andrii Nakryiko Reviewed-by: Quentin Monnet Link: https://lore.kernel.org/bpf/20230920213145.1941596-6-jolsa@kernel.org --- src/link.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/link.c b/src/link.c index 2e5c231..d15d74c 100644 --- a/src/link.c +++ b/src/link.c @@ -265,6 +265,7 @@ show_kprobe_multi_json(struct bpf_link_info *info, json_writer_t *wtr) jsonw_bool_field(json_wtr, "retprobe", info->kprobe_multi.flags & BPF_F_KPROBE_MULTI_RETURN); jsonw_uint_field(json_wtr, "func_cnt", info->kprobe_multi.count); + jsonw_uint_field(json_wtr, "missed", info->kprobe_multi.missed); jsonw_name(json_wtr, "funcs"); jsonw_start_array(json_wtr); addrs = u64_to_ptr(info->kprobe_multi.addrs); @@ -641,6 +642,8 @@ static void show_kprobe_multi_plain(struct bpf_link_info *info) else printf("\n\tkprobe.multi "); printf("func_cnt %u ", info->kprobe_multi.count); + if (info->kprobe_multi.missed) + printf("missed %llu ", info->kprobe_multi.missed); addrs = (__u64 *)u64_to_ptr(info->kprobe_multi.addrs); qsort(addrs, info->kprobe_multi.count, sizeof(__u64), cmp_u64); -- cgit v1.2.3