[PATCHv2 bpf-next 1/9] bpf: Count stats for kprobe_multi programs

[Jiri Olsa <jolsa@xxxxxxxxxx>]

Adding support to gather missed stats for kprobe_multi
programs due to bpf_prog_active protection.

Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
 kernel/trace/bpf_trace.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index a7264b2c17ad..279a3d370812 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -2710,6 +2710,7 @@ kprobe_multi_link_prog_run(struct bpf_kprobe_multi_link *link,
 	int err;
 
 	if (unlikely(__this_cpu_inc_return(bpf_prog_active) != 1)) {
+		bpf_prog_inc_misses_counter(link->link.prog);
 		err = 0;
 		goto out;
 	}
-- 
2.41.0