Commit-ID: 8008aab0962ea68cc00d15e8d7b0637b48837a40 Gitweb: https://git.kernel.org/tip/8008aab0962ea68cc00d15e8d7b0637b48837a40 Author: Arnaldo Carvalho de Melo <a...@redhat.com> AuthorDate: Tue, 6 Nov 2018 15:50:36 -0300 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Wed, 21 Nov 2018 12:00:31 -0300
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.hun...@intel.com> Cc: David Ahern <dsah...@gmail.com> Cc: Jiri Olsa <jo...@kernel.org> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Wang Nan <wangn...@huawei.com> Link: https://lkml.kernel.org/n/tip-9sybmz4vchlbpqwx2am13...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/include/bpf/pid_filter.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) 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_
