diff options
| author | Alexei Starovoitov <ast@kernel.org> | 2021-02-09 19:36:31 -0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-02-11 16:19:20 +0100 |
| commit | 9ed9e9ba2337205311398a312796c213737bac35 (patch) | |
| tree | 361082a8f4e91f8d2891a77168843bdce88a9958 /tools | |
| parent | 406c557edc5bb903db9f6cdd543cfc282c663ad8 (diff) | |
| download | linux-9ed9e9ba2337205311398a312796c213737bac35.tar.bz2 | |
bpf: Count the number of times recursion was prevented
Add per-program counter for number of times recursion prevention mechanism
was triggered and expose it via show_fdinfo and bpf_prog_info.
Teach bpftool to print it.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210210033634.62081-7-alexei.starovoitov@gmail.com
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/bpf/bpftool/prog.c | 4 | ||||
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c index 1fe3ba255bad..f2b915b20546 100644 --- a/tools/bpf/bpftool/prog.c +++ b/tools/bpf/bpftool/prog.c @@ -368,6 +368,8 @@ static void print_prog_header_json(struct bpf_prog_info *info) jsonw_uint_field(json_wtr, "run_time_ns", info->run_time_ns); jsonw_uint_field(json_wtr, "run_cnt", info->run_cnt); } + if (info->recursion_misses) + jsonw_uint_field(json_wtr, "recursion_misses", info->recursion_misses); } static void print_prog_json(struct bpf_prog_info *info, int fd) @@ -446,6 +448,8 @@ static void print_prog_header_plain(struct bpf_prog_info *info) if (info->run_time_ns) printf(" run_time_ns %lld run_cnt %lld", info->run_time_ns, info->run_cnt); + if (info->recursion_misses) + printf(" recursion_misses %lld", info->recursion_misses); printf("\n"); } diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index c001766adcbc..c547ad1ffe43 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -4501,6 +4501,7 @@ struct bpf_prog_info { __aligned_u64 prog_tags; __u64 run_time_ns; __u64 run_cnt; + __u64 recursion_misses; } __attribute__((aligned(8))); struct bpf_map_info { |