diff options
| author | Alexei Starovoitov | 2020-05-01 10:36:32 -0700 |
|---|---|---|
| committer | Alexei Starovoitov | 2020-05-01 10:37:34 -0700 |
| commit | 3dbb5b5040c396274a253b607289748f39a680a0 (patch) | |
| tree | 6b010c99c159d08a48680e709ca37e3fe3e17971 /tools/include | |
| parent | c321022244708aec4675de4f032ef1ba9ff0c640 (diff) | |
| parent | 31a9f7fe93378ab587d758d5b2e96a237caa7b8c (diff) | |
Merge branch 'bpf_enable_stats'
Song Liu says:
====================
run_time_ns is a useful stats for BPF programs. However, it is gated by
sysctl kernel.bpf_stats_enabled. When multiple user space tools are
toggling kernl.bpf_stats_enabled at the same time, they may confuse each
other.
Solve this problem with a new BPF command BPF_ENABLE_STATS.
Changes v8 => v9:
1. Clean up in selftest (Andrii).
2. Not using static variable in test program (Andrii).
Changes v7 => v8:
1. Change name BPF_STATS_RUNTIME_CNT => BPF_STATS_RUN_TIME (Alexei).
2. Add CHECK_ATTR to bpf_enable_stats() (Alexei).
3. Rebase (Andrii).
4. Simplfy the selftest (Alexei).
Changes v6 => v7:
1. Add test to verify run_cnt matches count measured by the program.
Changes v5 => v6:
1. Simplify test program (Yonghong).
2. Rebase (with some conflicts).
Changes v4 => v5:
1. Use memset to zero bpf_attr in bpf_enable_stats() (Andrii).
Changes v3 => v4:
1. Add libbpf support and selftest;
2. Avoid cleaning trailing space.
Changes v2 => v3:
1. Rename the command to BPF_ENABLE_STATS, and make it extendible.
2. fix commit log;
3. remove unnecessary headers.
====================
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 0eccafae55bb..705e4822f997 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -115,6 +115,7 @@ enum bpf_cmd { BPF_LINK_UPDATE, BPF_LINK_GET_FD_BY_ID, BPF_LINK_GET_NEXT_ID, + BPF_ENABLE_STATS, }; enum bpf_map_type { @@ -390,6 +391,12 @@ enum { */ #define BPF_F_QUERY_EFFECTIVE (1U << 0) +/* type for BPF_ENABLE_STATS */ +enum bpf_stats_type { + /* enabled run_time_ns and run_cnt */ + BPF_STATS_RUN_TIME = 0, +}; + enum bpf_stack_build_id_status { /* user space need an empty entry to identify end of a trace */ BPF_STACK_BUILD_ID_EMPTY = 0, @@ -601,6 +608,10 @@ union bpf_attr { __u32 old_prog_fd; } link_update; + struct { /* struct used by BPF_ENABLE_STATS command */ + __u32 type; + } enable_stats; + } __attribute__((aligned(8))); /* The description below is an attempt at providing documentation to eBPF |