bpf_counter.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __PERF_BPF_COUNTER_H
 3#define __PERF_BPF_COUNTER_H 1
 4
 5struct evsel;
 6struct target;
 7
 8#ifdef HAVE_BPF_SKEL
 9
10typedef int (*bpf_counter_evsel_op)(struct evsel *evsel);
11typedef int (*bpf_counter_evsel_target_op)(struct evsel *evsel,
12					   struct target *target);
13typedef int (*bpf_counter_evsel_install_pe_op)(struct evsel *evsel,
14					       int cpu_map_idx,
15					       int fd);
16
17/* Shared ops between bpf_counter, bpf_counter_cgroup, etc. */
18struct bpf_counter_ops {
19	bpf_counter_evsel_target_op load;
20	bpf_counter_evsel_op enable;
21	bpf_counter_evsel_op disable;
22	bpf_counter_evsel_op read;
23	bpf_counter_evsel_op destroy;
24	bpf_counter_evsel_install_pe_op install_pe;
25};
26
27int bpf_counter__load(struct evsel *evsel, struct target *target);
28int bpf_counter__enable(struct evsel *evsel);
29int bpf_counter__disable(struct evsel *evsel);
30int bpf_counter__read(struct evsel *evsel);
31void bpf_counter__destroy(struct evsel *evsel);
32int bpf_counter__install_pe(struct evsel *evsel, int cpu_map_idx, int fd);
33
34int bperf_trigger_reading(int prog_fd, int cpu);
35void set_max_rlimit(void);
36
37#else /* HAVE_BPF_SKEL */
38
39#include <linux/err.h>
40
41static inline int bpf_counter__load(struct evsel *evsel __maybe_unused,
42				    struct target *target __maybe_unused)
43{
44	return 0;
45}
46
47static inline int bpf_counter__enable(struct evsel *evsel __maybe_unused)
48{
49	return 0;
50}
51
52static inline int bpf_counter__disable(struct evsel *evsel __maybe_unused)
53{
54	return 0;
55}
56
57static inline int bpf_counter__read(struct evsel *evsel __maybe_unused)
58{
59	return -EAGAIN;
60}
61
62static inline void bpf_counter__destroy(struct evsel *evsel __maybe_unused)
63{
64}
65
66static inline int bpf_counter__install_pe(struct evsel *evsel __maybe_unused,
67					  int cpu __maybe_unused,
68					  int fd __maybe_unused)
69{
70	return 0;
71}
72
73#endif /* HAVE_BPF_SKEL */
74
75#endif /* __PERF_BPF_COUNTER_H */