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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-11-06 15:50:36 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-11-21 12:00:31 -0300 |
| commit | 8008aab0962ea68cc00d15e8d7b0637b48837a40 (patch) | |
| tree | d48b4793cf351867fbf1a21a2ef397af9039c4b7 /tools | |
| parent | 382b55dbef6b68e3fef2fd8a438fbaff57695308 (diff) | |
| download | linux-8008aab0962ea68cc00d15e8d7b0637b48837a40.tar.bz2 | |
perf bpf: Add simple pid_filter class accessible to BPF proggies
Will be used in the augmented_raw_syscalls.c to implement 'perf trace
--filter-pids'.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-9sybmz4vchlbpqwx2am13h9e@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/include/bpf/pid_filter.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tools/perf/include/bpf/pid_filter.h b/tools/perf/include/bpf/pid_filter.h new file mode 100644 index 000000000000..6e61c4bdf548 --- /dev/null +++ b/tools/perf/include/bpf/pid_filter.h @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: LGPL-2.1 + +#ifndef _PERF_BPF_PID_FILTER_ +#define _PERF_BPF_PID_FILTER_ + +#include <bpf.h> + +#define pid_filter(name) pid_map(name, bool) + +static int pid_filter__add(struct bpf_map *pids, pid_t pid) +{ + bool value = true; + return bpf_map_update_elem(pids, &pid, &value, BPF_NOEXIST); +} + +static bool pid_filter__has(struct bpf_map *pids, pid_t pid) +{ + return bpf_map_lookup_elem(pids, &pid) != NULL; +} + +#endif // _PERF_BPF_PID_FILTER_ |