Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 05/28] perf bpf: Add simple pid_filter class accessible to BPF proggies | Date | Thu, 22 Nov 2018 00:35:48 -0300 |
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From: Arnaldo Carvalho de Melo <acme@redhat.com>
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> --- tools/perf/include/bpf/pid_filter.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 tools/perf/include/bpf/pid_filter.h
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_ -- 2.14.5
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