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69d262a9 WN |
1 | /* |
2 | * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com> | |
3 | * Copyright (C) 2015, Huawei Inc. | |
4 | */ | |
5 | #ifndef __BPF_LOADER_H | |
6 | #define __BPF_LOADER_H | |
7 | ||
8 | #include <linux/compiler.h> | |
9 | #include <linux/err.h> | |
10 | #include <string.h> | |
d3e0ce39 | 11 | #include <bpf/libbpf.h> |
4edf30e3 | 12 | #include "probe-event.h" |
066dacbf | 13 | #include "evlist.h" |
69d262a9 WN |
14 | #include "debug.h" |
15 | ||
d3e0ce39 WN |
16 | enum bpf_loader_errno { |
17 | __BPF_LOADER_ERRNO__START = __LIBBPF_ERRNO__START - 100, | |
18 | /* Invalid config string */ | |
19 | BPF_LOADER_ERRNO__CONFIG = __BPF_LOADER_ERRNO__START, | |
20 | BPF_LOADER_ERRNO__GROUP, /* Invalid group name */ | |
21 | BPF_LOADER_ERRNO__EVENTNAME, /* Event name is missing */ | |
22 | BPF_LOADER_ERRNO__INTERNAL, /* BPF loader internal error */ | |
23 | BPF_LOADER_ERRNO__COMPILE, /* Error when compiling BPF scriptlet */ | |
0bb93490 | 24 | BPF_LOADER_ERRNO__PROGCONF_TERM,/* Invalid program config term in config string */ |
bfc077b4 HK |
25 | BPF_LOADER_ERRNO__PROLOGUE, /* Failed to generate prologue */ |
26 | BPF_LOADER_ERRNO__PROLOGUE2BIG, /* Prologue too big for program */ | |
27 | BPF_LOADER_ERRNO__PROLOGUEOOB, /* Offset out of bound for prologue */ | |
066dacbf WN |
28 | BPF_LOADER_ERRNO__OBJCONF_OPT, /* Invalid object config option */ |
29 | BPF_LOADER_ERRNO__OBJCONF_CONF, /* Config value not set (lost '=')) */ | |
30 | BPF_LOADER_ERRNO__OBJCONF_MAP_OPT, /* Invalid object map config option */ | |
31 | BPF_LOADER_ERRNO__OBJCONF_MAP_NOTEXIST, /* Target map not exist */ | |
32 | BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE, /* Incorrect value type for map */ | |
33 | BPF_LOADER_ERRNO__OBJCONF_MAP_TYPE, /* Incorrect map type */ | |
34 | BPF_LOADER_ERRNO__OBJCONF_MAP_KEYSIZE, /* Incorrect map key size */ | |
35 | BPF_LOADER_ERRNO__OBJCONF_MAP_VALUESIZE,/* Incorrect map value size */ | |
d3e0ce39 WN |
36 | __BPF_LOADER_ERRNO__END, |
37 | }; | |
38 | ||
69d262a9 | 39 | struct bpf_object; |
066dacbf | 40 | struct parse_events_term; |
aa3abf30 | 41 | #define PERF_BPF_PROBE_GROUP "perf_bpf_probe" |
69d262a9 | 42 | |
4edf30e3 WN |
43 | typedef int (*bpf_prog_iter_callback_t)(struct probe_trace_event *tev, |
44 | int fd, void *arg); | |
45 | ||
69d262a9 | 46 | #ifdef HAVE_LIBBPF_SUPPORT |
d509db04 | 47 | struct bpf_object *bpf__prepare_load(const char *filename, bool source); |
d3e0ce39 WN |
48 | int bpf__strerror_prepare_load(const char *filename, bool source, |
49 | int err, char *buf, size_t size); | |
69d262a9 | 50 | |
ba1fae43 WN |
51 | struct bpf_object *bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz, |
52 | const char *name); | |
53 | ||
69d262a9 | 54 | void bpf__clear(void); |
aa3abf30 WN |
55 | |
56 | int bpf__probe(struct bpf_object *obj); | |
57 | int bpf__unprobe(struct bpf_object *obj); | |
58 | int bpf__strerror_probe(struct bpf_object *obj, int err, | |
59 | char *buf, size_t size); | |
60 | ||
1e5e3ee8 WN |
61 | int bpf__load(struct bpf_object *obj); |
62 | int bpf__strerror_load(struct bpf_object *obj, int err, | |
63 | char *buf, size_t size); | |
4edf30e3 WN |
64 | int bpf__foreach_tev(struct bpf_object *obj, |
65 | bpf_prog_iter_callback_t func, void *arg); | |
066dacbf WN |
66 | |
67 | int bpf__config_obj(struct bpf_object *obj, struct parse_events_term *term, | |
68 | struct perf_evlist *evlist, int *error_pos); | |
69 | int bpf__strerror_config_obj(struct bpf_object *obj, | |
70 | struct parse_events_term *term, | |
71 | struct perf_evlist *evlist, | |
72 | int *error_pos, int err, char *buf, | |
73 | size_t size); | |
8690a2a7 WN |
74 | int bpf__apply_obj_config(void); |
75 | int bpf__strerror_apply_obj_config(int err, char *buf, size_t size); | |
69d262a9 WN |
76 | #else |
77 | static inline struct bpf_object * | |
d509db04 WN |
78 | bpf__prepare_load(const char *filename __maybe_unused, |
79 | bool source __maybe_unused) | |
69d262a9 WN |
80 | { |
81 | pr_debug("ERROR: eBPF object loading is disabled during compiling.\n"); | |
82 | return ERR_PTR(-ENOTSUP); | |
83 | } | |
84 | ||
ba1fae43 WN |
85 | static inline struct bpf_object * |
86 | bpf__prepare_load_buffer(void *obj_buf __maybe_unused, | |
87 | size_t obj_buf_sz __maybe_unused) | |
88 | { | |
89 | return ERR_PTR(-ENOTSUP); | |
90 | } | |
91 | ||
69d262a9 | 92 | static inline void bpf__clear(void) { } |
aa3abf30 WN |
93 | |
94 | static inline int bpf__probe(struct bpf_object *obj __maybe_unused) { return 0;} | |
95 | static inline int bpf__unprobe(struct bpf_object *obj __maybe_unused) { return 0;} | |
1e5e3ee8 | 96 | static inline int bpf__load(struct bpf_object *obj __maybe_unused) { return 0; } |
aa3abf30 | 97 | |
4edf30e3 WN |
98 | static inline int |
99 | bpf__foreach_tev(struct bpf_object *obj __maybe_unused, | |
100 | bpf_prog_iter_callback_t func __maybe_unused, | |
101 | void *arg __maybe_unused) | |
102 | { | |
103 | return 0; | |
104 | } | |
105 | ||
066dacbf WN |
106 | static inline int |
107 | bpf__config_obj(struct bpf_object *obj __maybe_unused, | |
108 | struct parse_events_term *term __maybe_unused, | |
109 | struct perf_evlist *evlist __maybe_unused, | |
110 | int *error_pos __maybe_unused) | |
111 | { | |
112 | return 0; | |
113 | } | |
114 | ||
8690a2a7 WN |
115 | static inline int |
116 | bpf__apply_obj_config(void) | |
117 | { | |
118 | return 0; | |
119 | } | |
120 | ||
aa3abf30 WN |
121 | static inline int |
122 | __bpf_strerror(char *buf, size_t size) | |
123 | { | |
124 | if (!size) | |
125 | return 0; | |
126 | strncpy(buf, | |
127 | "ERROR: eBPF object loading is disabled during compiling.\n", | |
128 | size); | |
129 | buf[size - 1] = '\0'; | |
130 | return 0; | |
131 | } | |
132 | ||
d3e0ce39 WN |
133 | static inline |
134 | int bpf__strerror_prepare_load(const char *filename __maybe_unused, | |
135 | bool source __maybe_unused, | |
136 | int err __maybe_unused, | |
137 | char *buf, size_t size) | |
138 | { | |
139 | return __bpf_strerror(buf, size); | |
140 | } | |
141 | ||
aa3abf30 WN |
142 | static inline int |
143 | bpf__strerror_probe(struct bpf_object *obj __maybe_unused, | |
144 | int err __maybe_unused, | |
145 | char *buf, size_t size) | |
146 | { | |
147 | return __bpf_strerror(buf, size); | |
148 | } | |
1e5e3ee8 WN |
149 | |
150 | static inline int bpf__strerror_load(struct bpf_object *obj __maybe_unused, | |
151 | int err __maybe_unused, | |
152 | char *buf, size_t size) | |
153 | { | |
154 | return __bpf_strerror(buf, size); | |
155 | } | |
066dacbf WN |
156 | |
157 | static inline int | |
158 | bpf__strerror_config_obj(struct bpf_object *obj __maybe_unused, | |
159 | struct parse_events_term *term __maybe_unused, | |
160 | struct perf_evlist *evlist __maybe_unused, | |
161 | int *error_pos __maybe_unused, | |
162 | int err __maybe_unused, | |
163 | char *buf, size_t size) | |
164 | { | |
165 | return __bpf_strerror(buf, size); | |
166 | } | |
8690a2a7 WN |
167 | |
168 | static inline int | |
169 | bpf__strerror_apply_obj_config(int err __maybe_unused, | |
170 | char *buf, size_t size) | |
171 | { | |
172 | return __bpf_strerror(buf, size); | |
173 | } | |
69d262a9 WN |
174 | #endif |
175 | #endif |