Commit 8008aab0 authored Nov 06, 2018 by Arnaldo Carvalho de Melo

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>

parent 382b55db

tools/perf/include/bpf/pid_filter.h

0 → 100644

+21 −0

Original line number	Diff line number	Diff line
		// 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_

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