1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
4 * Copyright (C) 2015, Huawei Inc.
9 #include <linux/compiler.h>
10 #include <linux/err.h>
12 #include <bpf/libbpf.h>
13 #include "probe-event.h"
17 enum bpf_loader_errno {
18 __BPF_LOADER_ERRNO__START = __LIBBPF_ERRNO__START - 100,
19 /* Invalid config string */
20 BPF_LOADER_ERRNO__CONFIG = __BPF_LOADER_ERRNO__START,
21 BPF_LOADER_ERRNO__GROUP, /* Invalid group name */
22 BPF_LOADER_ERRNO__EVENTNAME, /* Event name is missing */
23 BPF_LOADER_ERRNO__INTERNAL, /* BPF loader internal error */
24 BPF_LOADER_ERRNO__COMPILE, /* Error when compiling BPF scriptlet */
25 BPF_LOADER_ERRNO__PROGCONF_TERM,/* Invalid program config term in config string */
26 BPF_LOADER_ERRNO__PROLOGUE, /* Failed to generate prologue */
27 BPF_LOADER_ERRNO__PROLOGUE2BIG, /* Prologue too big for program */
28 BPF_LOADER_ERRNO__PROLOGUEOOB, /* Offset out of bound for prologue */
29 BPF_LOADER_ERRNO__OBJCONF_OPT, /* Invalid object config option */
30 BPF_LOADER_ERRNO__OBJCONF_CONF, /* Config value not set (lost '=')) */
31 BPF_LOADER_ERRNO__OBJCONF_MAP_OPT, /* Invalid object map config option */
32 BPF_LOADER_ERRNO__OBJCONF_MAP_NOTEXIST, /* Target map not exist */
33 BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE, /* Incorrect value type for map */
34 BPF_LOADER_ERRNO__OBJCONF_MAP_TYPE, /* Incorrect map type */
35 BPF_LOADER_ERRNO__OBJCONF_MAP_KEYSIZE, /* Incorrect map key size */
36 BPF_LOADER_ERRNO__OBJCONF_MAP_VALUESIZE,/* Incorrect map value size */
37 BPF_LOADER_ERRNO__OBJCONF_MAP_NOEVT, /* Event not found for map setting */
38 BPF_LOADER_ERRNO__OBJCONF_MAP_MAPSIZE, /* Invalid map size for event setting */
39 BPF_LOADER_ERRNO__OBJCONF_MAP_EVTDIM, /* Event dimension too large */
40 BPF_LOADER_ERRNO__OBJCONF_MAP_EVTINH, /* Doesn't support inherit event */
41 BPF_LOADER_ERRNO__OBJCONF_MAP_EVTTYPE, /* Wrong event type for map */
42 BPF_LOADER_ERRNO__OBJCONF_MAP_IDX2BIG, /* Index too large */
43 __BPF_LOADER_ERRNO__END,
48 struct parse_events_term;
49 #define PERF_BPF_PROBE_GROUP "perf_bpf_probe"
51 typedef int (*bpf_prog_iter_callback_t)(const char *group, const char *event,
54 #ifdef HAVE_LIBBPF_SUPPORT
55 struct bpf_object *bpf__prepare_load(const char *filename, bool source);
56 int bpf__strerror_prepare_load(const char *filename, bool source,
57 int err, char *buf, size_t size);
59 struct bpf_object *bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz,
62 void bpf__clear(void);
64 int bpf__probe(struct bpf_object *obj);
65 int bpf__unprobe(struct bpf_object *obj);
66 int bpf__strerror_probe(struct bpf_object *obj, int err,
67 char *buf, size_t size);
69 int bpf__load(struct bpf_object *obj);
70 int bpf__strerror_load(struct bpf_object *obj, int err,
71 char *buf, size_t size);
72 int bpf__foreach_event(struct bpf_object *obj,
73 bpf_prog_iter_callback_t func, void *arg);
75 int bpf__config_obj(struct bpf_object *obj, struct parse_events_term *term,
76 struct perf_evlist *evlist, int *error_pos);
77 int bpf__strerror_config_obj(struct bpf_object *obj,
78 struct parse_events_term *term,
79 struct perf_evlist *evlist,
80 int *error_pos, int err, char *buf,
82 int bpf__apply_obj_config(void);
83 int bpf__strerror_apply_obj_config(int err, char *buf, size_t size);
85 int bpf__setup_stdout(struct perf_evlist *evlist);
86 struct perf_evsel *bpf__setup_output_event(struct perf_evlist *evlist, const char *name);
87 int bpf__strerror_setup_output_event(struct perf_evlist *evlist, int err, char *buf, size_t size);
91 static inline struct bpf_object *
92 bpf__prepare_load(const char *filename __maybe_unused,
93 bool source __maybe_unused)
95 pr_debug("ERROR: eBPF object loading is disabled during compiling.\n");
96 return ERR_PTR(-ENOTSUP);
99 static inline struct bpf_object *
100 bpf__prepare_load_buffer(void *obj_buf __maybe_unused,
101 size_t obj_buf_sz __maybe_unused)
103 return ERR_PTR(-ENOTSUP);
106 static inline void bpf__clear(void) { }
108 static inline int bpf__probe(struct bpf_object *obj __maybe_unused) { return 0;}
109 static inline int bpf__unprobe(struct bpf_object *obj __maybe_unused) { return 0;}
110 static inline int bpf__load(struct bpf_object *obj __maybe_unused) { return 0; }
113 bpf__foreach_event(struct bpf_object *obj __maybe_unused,
114 bpf_prog_iter_callback_t func __maybe_unused,
115 void *arg __maybe_unused)
121 bpf__config_obj(struct bpf_object *obj __maybe_unused,
122 struct parse_events_term *term __maybe_unused,
123 struct perf_evlist *evlist __maybe_unused,
124 int *error_pos __maybe_unused)
130 bpf__apply_obj_config(void)
136 bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused)
141 static inline struct perf_evsel *
142 bpf__setup_output_event(struct perf_evlist *evlist __maybe_unused, const char *name __maybe_unused)
148 __bpf_strerror(char *buf, size_t size)
153 "ERROR: eBPF object loading is disabled during compiling.\n",
155 buf[size - 1] = '\0';
160 int bpf__strerror_prepare_load(const char *filename __maybe_unused,
161 bool source __maybe_unused,
162 int err __maybe_unused,
163 char *buf, size_t size)
165 return __bpf_strerror(buf, size);
169 bpf__strerror_probe(struct bpf_object *obj __maybe_unused,
170 int err __maybe_unused,
171 char *buf, size_t size)
173 return __bpf_strerror(buf, size);
176 static inline int bpf__strerror_load(struct bpf_object *obj __maybe_unused,
177 int err __maybe_unused,
178 char *buf, size_t size)
180 return __bpf_strerror(buf, size);
184 bpf__strerror_config_obj(struct bpf_object *obj __maybe_unused,
185 struct parse_events_term *term __maybe_unused,
186 struct perf_evlist *evlist __maybe_unused,
187 int *error_pos __maybe_unused,
188 int err __maybe_unused,
189 char *buf, size_t size)
191 return __bpf_strerror(buf, size);
195 bpf__strerror_apply_obj_config(int err __maybe_unused,
196 char *buf, size_t size)
198 return __bpf_strerror(buf, size);
202 bpf__strerror_setup_output_event(struct perf_evlist *evlist __maybe_unused,
203 int err __maybe_unused, char *buf, size_t size)
205 return __bpf_strerror(buf, size);
210 static inline int bpf__strerror_setup_stdout(struct perf_evlist *evlist, int err, char *buf, size_t size)
212 return bpf__strerror_setup_output_event(evlist, err, buf, size);