bpf-filter.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef PERF_UTIL_BPF_FILTER_H
 3#define PERF_UTIL_BPF_FILTER_H
 4
 5#include <linux/list.h>
 6
 7#include "bpf_skel/sample-filter.h"
 8#include "util/debug.h"
 9
10struct perf_bpf_filter_expr {
11	struct list_head list;
12	struct list_head groups;
13	enum perf_bpf_filter_op op;
14	int part;
15	enum perf_bpf_filter_term term;
16	unsigned long val;
17};
18
19struct evsel;
20struct target;
21
22/* path in BPF-fs for the pinned program and maps */
23#define PERF_BPF_FILTER_PIN_PATH  "perf_filter"
24
25#ifdef HAVE_BPF_SKEL
26struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(enum perf_bpf_filter_term term,
27						       int part,
28						       enum perf_bpf_filter_op op,
29						       unsigned long val);
30int perf_bpf_filter__parse(struct list_head *expr_head, const char *str);
31int perf_bpf_filter__prepare(struct evsel *evsel, struct target *target);
32int perf_bpf_filter__destroy(struct evsel *evsel);
33u64 perf_bpf_filter__lost_count(struct evsel *evsel);
34int perf_bpf_filter__pin(void);
35int perf_bpf_filter__unpin(void);
36
37#else /* !HAVE_BPF_SKEL */
38
39#include <errno.h>
40
41static inline int perf_bpf_filter__parse(struct list_head *expr_head __maybe_unused,
42					 const char *str __maybe_unused)
43{
44	pr_err("Error: BPF filter is requested but perf is not built with BPF.\n"
45		"\tPlease make sure to build with libbpf and BPF skeleton.\n");
46	return -EOPNOTSUPP;
47}
48static inline int perf_bpf_filter__prepare(struct evsel *evsel __maybe_unused,
49					   struct target *target __maybe_unused)
50{
51	return -EOPNOTSUPP;
52}
53static inline int perf_bpf_filter__destroy(struct evsel *evsel __maybe_unused)
54{
55	return -EOPNOTSUPP;
56}
57static inline u64 perf_bpf_filter__lost_count(struct evsel *evsel __maybe_unused)
58{
59	return 0;
60}
61static inline int perf_bpf_filter__pin(void)
62{
63	return -EOPNOTSUPP;
64}
65static inline int perf_bpf_filter__unpin(void)
66{
67	return -EOPNOTSUPP;
68}
69#endif /* HAVE_BPF_SKEL*/
70#endif /* PERF_UTIL_BPF_FILTER_H */