diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2023-09-20 23:31:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-11-01 01:58:19 +0100 |
| commit | 99bf10e92a3f9faf75275a9c6382bd14680290fb (patch) | |
| tree | 1e984acdee441a0dfdc9360156d8d8cbbab80027 /include | |
| parent | f4381ccf1ed1938e1d551cc1ea8b526292873230 (diff) | |
| download | linux-99bf10e92a3f9faf75275a9c6382bd14680290fb.tar.gz linux-99bf10e92a3f9faf75275a9c6382bd14680290fb.tar.bz2 linux-99bf10e92a3f9faf75275a9c6382bd14680290fb.zip | |
bpf: Add missed value to kprobe perf link info
[ Upstream commit 3acf8ace68230e9558cf916847f1cc9f208abdf1 ]
Add missed value to kprobe attached through perf link info to
hold the stats of missed kprobe handler execution.
The kprobe's missed counter gets incremented when kprobe handler
is not executed due to another kprobe running on the same cpu.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230920213145.1941596-4-jolsa@kernel.org
Stable-dep-of: 4deecdd29cf2 ("bpf: fix unpopulated name_len field in perf_event link info")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/trace_events.h | 6 | ||||
| -rw-r--r-- | include/uapi/linux/bpf.h | 1 |
2 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index cb8bd759e800..9d799777c333 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -765,7 +765,8 @@ struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name); void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp); int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, u32 *fd_type, const char **buf, - u64 *probe_offset, u64 *probe_addr); + u64 *probe_offset, u64 *probe_addr, + unsigned long *missed); int bpf_kprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog); int bpf_uprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog); #else @@ -805,7 +806,7 @@ static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp) static inline int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, u32 *fd_type, const char **buf, u64 *probe_offset, - u64 *probe_addr) + u64 *probe_addr, unsigned long *missed) { return -EOPNOTSUPP; } @@ -880,6 +881,7 @@ extern void perf_kprobe_destroy(struct perf_event *event); extern int bpf_get_kprobe_info(const struct perf_event *event, u32 *fd_type, const char **symbol, u64 *probe_offset, u64 *probe_addr, + unsigned long *missed, bool perf_type_tracepoint); #endif #ifdef CONFIG_UPROBE_EVENTS diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 4bb38409b26a..6ea588d1ae14 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -6562,6 +6562,7 @@ struct bpf_link_info { __u32 name_len; __u32 offset; /* offset from func_name */ __u64 addr; + __u64 missed; } kprobe; /* BPF_PERF_EVENT_KPROBE, BPF_PERF_EVENT_KRETPROBE */ struct { __aligned_u64 tp_name; /* in/out */ |