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From: Jiri Olsa <jolsa@kernel.org>
To: Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Andrii Nakryiko <andrii@kernel.org>
Cc: Song Liu <song@kernel.org>,
	bpf@vger.kernel.org,
	Martin KaFai Lau <kafai@fb.com>,
	Song Liu <songliubraving@fb.com>,
	Yonghong Song <yhs@fb.com>,
	John Fastabend <john.fastabend@gmail.com>,
	KP Singh <kpsingh@chromium.org>,
	Stanislav Fomichev <sdf@google.com>,
	Hao Luo <haoluo@google.com>,
	Hou Tao <houtao1@huawei.com>,
	Daniel Xu <dxu@dxuuu.xyz>
Subject: [PATCHv3 bpf-next 1/9] bpf: Count stats for kprobe_multi programs
Date: Wed, 20 Sep 2023 23:31:37 +0200
Message-ID: <20230920213145.1941596-2-jolsa@kernel.org>
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Adding support to gather missed stats for kprobe_multi
programs due to bpf_prog_active protection.

Reviewed-and-tested-by: Song Liu <song@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 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