1 /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
4 * Common eBPF ELF object loading operations.
6 * Copyright (C) 2013-2015 Alexei Starovoitov <ast@kernel.org>
7 * Copyright (C) 2015 Wang Nan <wangnan0@huawei.com>
8 * Copyright (C) 2015 Huawei Inc.
10 #ifndef __LIBBPF_LIBBPF_H
11 #define __LIBBPF_LIBBPF_H
17 #include <sys/types.h> // for size_t
18 #include <linux/bpf.h>
20 #include "libbpf_common.h"
27 __LIBBPF_ERRNO__START
= 4000,
29 /* Something wrong in libelf */
30 LIBBPF_ERRNO__LIBELF
= __LIBBPF_ERRNO__START
,
31 LIBBPF_ERRNO__FORMAT
, /* BPF object format invalid */
32 LIBBPF_ERRNO__KVERSION
, /* Incorrect or no 'version' section */
33 LIBBPF_ERRNO__ENDIAN
, /* Endian mismatch */
34 LIBBPF_ERRNO__INTERNAL
, /* Internal error in libbpf */
35 LIBBPF_ERRNO__RELOC
, /* Relocation failed */
36 LIBBPF_ERRNO__LOAD
, /* Load program failure for unknown reason */
37 LIBBPF_ERRNO__VERIFY
, /* Kernel verifier blocks program loading */
38 LIBBPF_ERRNO__PROG2BIG
, /* Program too big */
39 LIBBPF_ERRNO__KVER
, /* Incorrect kernel version */
40 LIBBPF_ERRNO__PROGTYPE
, /* Kernel doesn't support this program type */
41 LIBBPF_ERRNO__WRNGPID
, /* Wrong pid in netlink message */
42 LIBBPF_ERRNO__INVSEQ
, /* Invalid netlink sequence */
43 LIBBPF_ERRNO__NLPARSE
, /* netlink parsing error */
47 LIBBPF_API
int libbpf_strerror(int err
, char *buf
, size_t size
);
49 enum libbpf_print_level
{
55 typedef int (*libbpf_print_fn_t
)(enum libbpf_print_level level
,
56 const char *, va_list ap
);
58 LIBBPF_API libbpf_print_fn_t
libbpf_set_print(libbpf_print_fn_t fn
);
60 /* Hide internal to user */
63 struct bpf_object_open_attr
{
65 enum bpf_prog_type prog_type
;
68 struct bpf_object_open_opts
{
69 /* size of this struct, for forward/backward compatiblity */
71 /* object name override, if provided:
72 * - for object open from file, this will override setting object
73 * name from file path's base name;
74 * - for object open from memory buffer, this will specify an object
75 * name and will override default "<addr>-<buf-size>" name;
77 const char *object_name
;
78 /* parse map definitions non-strictly, allowing extra attributes/data */
80 /* process CO-RE relocations non-strictly, allowing them to fail */
81 bool relaxed_core_relocs
;
82 /* maps that set the 'pinning' attribute in their definition will have
83 * their pin_path attribute set to a file in this directory, and be
84 * auto-pinned to that path on load; defaults to "/sys/fs/bpf".
86 const char *pin_root_path
;
88 /* Additional kernel config content that augments and overrides
89 * system Kconfig for CONFIG_xxx externs.
93 #define bpf_object_open_opts__last_field kconfig
95 LIBBPF_API
struct bpf_object
*bpf_object__open(const char *path
);
96 LIBBPF_API
struct bpf_object
*
97 bpf_object__open_file(const char *path
, const struct bpf_object_open_opts
*opts
);
98 LIBBPF_API
struct bpf_object
*
99 bpf_object__open_mem(const void *obj_buf
, size_t obj_buf_sz
,
100 const struct bpf_object_open_opts
*opts
);
102 /* deprecated bpf_object__open variants */
103 LIBBPF_API
struct bpf_object
*
104 bpf_object__open_buffer(const void *obj_buf
, size_t obj_buf_sz
,
106 LIBBPF_API
struct bpf_object
*
107 bpf_object__open_xattr(struct bpf_object_open_attr
*attr
);
109 enum libbpf_pin_type
{
111 /* PIN_BY_NAME: pin maps by name (in /sys/fs/bpf by default) */
115 /* pin_maps and unpin_maps can both be called with a NULL path, in which case
116 * they will use the pin_path attribute of each map (and ignore all maps that
117 * don't have a pin_path set).
119 LIBBPF_API
int bpf_object__pin_maps(struct bpf_object
*obj
, const char *path
);
120 LIBBPF_API
int bpf_object__unpin_maps(struct bpf_object
*obj
,
122 LIBBPF_API
int bpf_object__pin_programs(struct bpf_object
*obj
,
124 LIBBPF_API
int bpf_object__unpin_programs(struct bpf_object
*obj
,
126 LIBBPF_API
int bpf_object__pin(struct bpf_object
*object
, const char *path
);
127 LIBBPF_API
void bpf_object__close(struct bpf_object
*object
);
129 struct bpf_object_load_attr
{
130 struct bpf_object
*obj
;
132 const char *target_btf_path
;
135 /* Load/unload object into/from kernel */
136 LIBBPF_API
int bpf_object__load(struct bpf_object
*obj
);
137 LIBBPF_API
int bpf_object__load_xattr(struct bpf_object_load_attr
*attr
);
138 LIBBPF_API
int bpf_object__unload(struct bpf_object
*obj
);
140 LIBBPF_API
const char *bpf_object__name(const struct bpf_object
*obj
);
141 LIBBPF_API
unsigned int bpf_object__kversion(const struct bpf_object
*obj
);
144 LIBBPF_API
struct btf
*bpf_object__btf(const struct bpf_object
*obj
);
145 LIBBPF_API
int bpf_object__btf_fd(const struct bpf_object
*obj
);
147 LIBBPF_API
struct bpf_program
*
148 bpf_object__find_program_by_title(const struct bpf_object
*obj
,
150 LIBBPF_API
struct bpf_program
*
151 bpf_object__find_program_by_name(const struct bpf_object
*obj
,
154 LIBBPF_API
struct bpf_object
*bpf_object__next(struct bpf_object
*prev
);
155 #define bpf_object__for_each_safe(pos, tmp) \
156 for ((pos) = bpf_object__next(NULL), \
157 (tmp) = bpf_object__next(pos); \
159 (pos) = (tmp), (tmp) = bpf_object__next(tmp))
161 typedef void (*bpf_object_clear_priv_t
)(struct bpf_object
*, void *);
162 LIBBPF_API
int bpf_object__set_priv(struct bpf_object
*obj
, void *priv
,
163 bpf_object_clear_priv_t clear_priv
);
164 LIBBPF_API
void *bpf_object__priv(const struct bpf_object
*prog
);
167 libbpf_prog_type_by_name(const char *name
, enum bpf_prog_type
*prog_type
,
168 enum bpf_attach_type
*expected_attach_type
);
169 LIBBPF_API
int libbpf_attach_type_by_name(const char *name
,
170 enum bpf_attach_type
*attach_type
);
171 LIBBPF_API
int libbpf_find_vmlinux_btf_id(const char *name
,
172 enum bpf_attach_type attach_type
);
174 /* Accessors of bpf_program */
176 LIBBPF_API
struct bpf_program
*bpf_program__next(struct bpf_program
*prog
,
177 const struct bpf_object
*obj
);
179 #define bpf_object__for_each_program(pos, obj) \
180 for ((pos) = bpf_program__next(NULL, (obj)); \
182 (pos) = bpf_program__next((pos), (obj)))
184 LIBBPF_API
struct bpf_program
*bpf_program__prev(struct bpf_program
*prog
,
185 const struct bpf_object
*obj
);
187 typedef void (*bpf_program_clear_priv_t
)(struct bpf_program
*, void *);
189 LIBBPF_API
int bpf_program__set_priv(struct bpf_program
*prog
, void *priv
,
190 bpf_program_clear_priv_t clear_priv
);
192 LIBBPF_API
void *bpf_program__priv(const struct bpf_program
*prog
);
193 LIBBPF_API
void bpf_program__set_ifindex(struct bpf_program
*prog
,
196 LIBBPF_API
const char *bpf_program__name(const struct bpf_program
*prog
);
197 LIBBPF_API
const char *bpf_program__title(const struct bpf_program
*prog
,
200 /* returns program size in bytes */
201 LIBBPF_API
size_t bpf_program__size(const struct bpf_program
*prog
);
203 LIBBPF_API
int bpf_program__load(struct bpf_program
*prog
, char *license
,
205 LIBBPF_API
int bpf_program__fd(const struct bpf_program
*prog
);
206 LIBBPF_API
int bpf_program__pin_instance(struct bpf_program
*prog
,
209 LIBBPF_API
int bpf_program__unpin_instance(struct bpf_program
*prog
,
212 LIBBPF_API
int bpf_program__pin(struct bpf_program
*prog
, const char *path
);
213 LIBBPF_API
int bpf_program__unpin(struct bpf_program
*prog
, const char *path
);
214 LIBBPF_API
void bpf_program__unload(struct bpf_program
*prog
);
218 LIBBPF_API
void bpf_link__disconnect(struct bpf_link
*link
);
219 LIBBPF_API
int bpf_link__destroy(struct bpf_link
*link
);
221 LIBBPF_API
struct bpf_link
*
222 bpf_program__attach(struct bpf_program
*prog
);
223 LIBBPF_API
struct bpf_link
*
224 bpf_program__attach_perf_event(struct bpf_program
*prog
, int pfd
);
225 LIBBPF_API
struct bpf_link
*
226 bpf_program__attach_kprobe(struct bpf_program
*prog
, bool retprobe
,
227 const char *func_name
);
228 LIBBPF_API
struct bpf_link
*
229 bpf_program__attach_uprobe(struct bpf_program
*prog
, bool retprobe
,
230 pid_t pid
, const char *binary_path
,
232 LIBBPF_API
struct bpf_link
*
233 bpf_program__attach_tracepoint(struct bpf_program
*prog
,
234 const char *tp_category
,
235 const char *tp_name
);
236 LIBBPF_API
struct bpf_link
*
237 bpf_program__attach_raw_tracepoint(struct bpf_program
*prog
,
238 const char *tp_name
);
240 LIBBPF_API
struct bpf_link
*
241 bpf_program__attach_trace(struct bpf_program
*prog
);
245 * Libbpf allows callers to adjust BPF programs before being loaded
246 * into kernel. One program in an object file can be transformed into
247 * multiple variants to be attached to different hooks.
249 * bpf_program_prep_t, bpf_program__set_prep and bpf_program__nth_fd
250 * form an API for this purpose.
252 * - bpf_program_prep_t:
253 * Defines a 'preprocessor', which is a caller defined function
254 * passed to libbpf through bpf_program__set_prep(), and will be
255 * called before program is loaded. The processor should adjust
256 * the program one time for each instance according to the instance id
259 * - bpf_program__set_prep:
260 * Attaches a preprocessor to a BPF program. The number of instances
261 * that should be created is also passed through this function.
263 * - bpf_program__nth_fd:
264 * After the program is loaded, get resulting FD of a given instance
265 * of the BPF program.
267 * If bpf_program__set_prep() is not used, the program would be loaded
268 * without adjustment during bpf_object__load(). The program has only
269 * one instance. In this case bpf_program__fd(prog) is equal to
270 * bpf_program__nth_fd(prog, 0).
273 struct bpf_prog_prep_result
{
275 * If not NULL, load new instruction array.
276 * If set to NULL, don't load this instance.
278 struct bpf_insn
*new_insn_ptr
;
281 /* If not NULL, result FD is written to it. */
286 * Parameters of bpf_program_prep_t:
287 * - prog: The bpf_program being loaded.
288 * - n: Index of instance being generated.
289 * - insns: BPF instructions array.
290 * - insns_cnt:Number of instructions in insns.
291 * - res: Output parameter, result of transformation.
294 * - Zero: pre-processing success.
295 * - Non-zero: pre-processing error, stop loading.
297 typedef int (*bpf_program_prep_t
)(struct bpf_program
*prog
, int n
,
298 struct bpf_insn
*insns
, int insns_cnt
,
299 struct bpf_prog_prep_result
*res
);
301 LIBBPF_API
int bpf_program__set_prep(struct bpf_program
*prog
, int nr_instance
,
302 bpf_program_prep_t prep
);
304 LIBBPF_API
int bpf_program__nth_fd(const struct bpf_program
*prog
, int n
);
307 * Adjust type of BPF program. Default is kprobe.
309 LIBBPF_API
int bpf_program__set_socket_filter(struct bpf_program
*prog
);
310 LIBBPF_API
int bpf_program__set_tracepoint(struct bpf_program
*prog
);
311 LIBBPF_API
int bpf_program__set_raw_tracepoint(struct bpf_program
*prog
);
312 LIBBPF_API
int bpf_program__set_kprobe(struct bpf_program
*prog
);
313 LIBBPF_API
int bpf_program__set_sched_cls(struct bpf_program
*prog
);
314 LIBBPF_API
int bpf_program__set_sched_act(struct bpf_program
*prog
);
315 LIBBPF_API
int bpf_program__set_xdp(struct bpf_program
*prog
);
316 LIBBPF_API
int bpf_program__set_perf_event(struct bpf_program
*prog
);
317 LIBBPF_API
int bpf_program__set_tracing(struct bpf_program
*prog
);
319 LIBBPF_API
enum bpf_prog_type
bpf_program__get_type(struct bpf_program
*prog
);
320 LIBBPF_API
void bpf_program__set_type(struct bpf_program
*prog
,
321 enum bpf_prog_type type
);
323 LIBBPF_API
enum bpf_attach_type
324 bpf_program__get_expected_attach_type(struct bpf_program
*prog
);
326 bpf_program__set_expected_attach_type(struct bpf_program
*prog
,
327 enum bpf_attach_type type
);
329 LIBBPF_API
bool bpf_program__is_socket_filter(const struct bpf_program
*prog
);
330 LIBBPF_API
bool bpf_program__is_tracepoint(const struct bpf_program
*prog
);
331 LIBBPF_API
bool bpf_program__is_raw_tracepoint(const struct bpf_program
*prog
);
332 LIBBPF_API
bool bpf_program__is_kprobe(const struct bpf_program
*prog
);
333 LIBBPF_API
bool bpf_program__is_sched_cls(const struct bpf_program
*prog
);
334 LIBBPF_API
bool bpf_program__is_sched_act(const struct bpf_program
*prog
);
335 LIBBPF_API
bool bpf_program__is_xdp(const struct bpf_program
*prog
);
336 LIBBPF_API
bool bpf_program__is_perf_event(const struct bpf_program
*prog
);
337 LIBBPF_API
bool bpf_program__is_tracing(const struct bpf_program
*prog
);
340 * No need for __attribute__((packed)), all members of 'bpf_map_def'
341 * are all aligned. In addition, using __attribute__((packed))
342 * would trigger a -Wpacked warning message, and lead to an error
347 unsigned int key_size
;
348 unsigned int value_size
;
349 unsigned int max_entries
;
350 unsigned int map_flags
;
354 * The 'struct bpf_map' in include/linux/bpf.h is internal to the kernel,
355 * so no need to worry about a name clash.
358 LIBBPF_API
struct bpf_map
*
359 bpf_object__find_map_by_name(const struct bpf_object
*obj
, const char *name
);
362 bpf_object__find_map_fd_by_name(const struct bpf_object
*obj
, const char *name
);
365 * Get bpf_map through the offset of corresponding struct bpf_map_def
366 * in the BPF object file.
368 LIBBPF_API
struct bpf_map
*
369 bpf_object__find_map_by_offset(struct bpf_object
*obj
, size_t offset
);
371 LIBBPF_API
struct bpf_map
*
372 bpf_map__next(const struct bpf_map
*map
, const struct bpf_object
*obj
);
373 #define bpf_object__for_each_map(pos, obj) \
374 for ((pos) = bpf_map__next(NULL, (obj)); \
376 (pos) = bpf_map__next((pos), (obj)))
377 #define bpf_map__for_each bpf_object__for_each_map
379 LIBBPF_API
struct bpf_map
*
380 bpf_map__prev(const struct bpf_map
*map
, const struct bpf_object
*obj
);
382 LIBBPF_API
int bpf_map__fd(const struct bpf_map
*map
);
383 LIBBPF_API
const struct bpf_map_def
*bpf_map__def(const struct bpf_map
*map
);
384 LIBBPF_API
const char *bpf_map__name(const struct bpf_map
*map
);
385 LIBBPF_API __u32
bpf_map__btf_key_type_id(const struct bpf_map
*map
);
386 LIBBPF_API __u32
bpf_map__btf_value_type_id(const struct bpf_map
*map
);
388 typedef void (*bpf_map_clear_priv_t
)(struct bpf_map
*, void *);
389 LIBBPF_API
int bpf_map__set_priv(struct bpf_map
*map
, void *priv
,
390 bpf_map_clear_priv_t clear_priv
);
391 LIBBPF_API
void *bpf_map__priv(const struct bpf_map
*map
);
392 LIBBPF_API
int bpf_map__reuse_fd(struct bpf_map
*map
, int fd
);
393 LIBBPF_API
int bpf_map__resize(struct bpf_map
*map
, __u32 max_entries
);
394 LIBBPF_API
bool bpf_map__is_offload_neutral(const struct bpf_map
*map
);
395 LIBBPF_API
bool bpf_map__is_internal(const struct bpf_map
*map
);
396 LIBBPF_API
void bpf_map__set_ifindex(struct bpf_map
*map
, __u32 ifindex
);
397 LIBBPF_API
int bpf_map__set_pin_path(struct bpf_map
*map
, const char *path
);
398 LIBBPF_API
const char *bpf_map__get_pin_path(const struct bpf_map
*map
);
399 LIBBPF_API
bool bpf_map__is_pinned(const struct bpf_map
*map
);
400 LIBBPF_API
int bpf_map__pin(struct bpf_map
*map
, const char *path
);
401 LIBBPF_API
int bpf_map__unpin(struct bpf_map
*map
, const char *path
);
403 LIBBPF_API
int bpf_map__set_inner_map_fd(struct bpf_map
*map
, int fd
);
405 LIBBPF_API
long libbpf_get_error(const void *ptr
);
407 struct bpf_prog_load_attr
{
409 enum bpf_prog_type prog_type
;
410 enum bpf_attach_type expected_attach_type
;
416 LIBBPF_API
int bpf_prog_load_xattr(const struct bpf_prog_load_attr
*attr
,
417 struct bpf_object
**pobj
, int *prog_fd
);
418 LIBBPF_API
int bpf_prog_load(const char *file
, enum bpf_prog_type type
,
419 struct bpf_object
**pobj
, int *prog_fd
);
421 struct xdp_link_info
{
429 LIBBPF_API
int bpf_set_link_xdp_fd(int ifindex
, int fd
, __u32 flags
);
430 LIBBPF_API
int bpf_get_link_xdp_id(int ifindex
, __u32
*prog_id
, __u32 flags
);
431 LIBBPF_API
int bpf_get_link_xdp_info(int ifindex
, struct xdp_link_info
*info
,
432 size_t info_size
, __u32 flags
);
436 typedef void (*perf_buffer_sample_fn
)(void *ctx
, int cpu
,
437 void *data
, __u32 size
);
438 typedef void (*perf_buffer_lost_fn
)(void *ctx
, int cpu
, __u64 cnt
);
440 /* common use perf buffer options */
441 struct perf_buffer_opts
{
442 /* if specified, sample_cb is called for each sample */
443 perf_buffer_sample_fn sample_cb
;
444 /* if specified, lost_cb is called for each batch of lost samples */
445 perf_buffer_lost_fn lost_cb
;
446 /* ctx is provided to sample_cb and lost_cb */
450 LIBBPF_API
struct perf_buffer
*
451 perf_buffer__new(int map_fd
, size_t page_cnt
,
452 const struct perf_buffer_opts
*opts
);
454 enum bpf_perf_event_ret
{
455 LIBBPF_PERF_EVENT_DONE
= 0,
456 LIBBPF_PERF_EVENT_ERROR
= -1,
457 LIBBPF_PERF_EVENT_CONT
= -2,
460 struct perf_event_header
;
462 typedef enum bpf_perf_event_ret
463 (*perf_buffer_event_fn
)(void *ctx
, int cpu
, struct perf_event_header
*event
);
465 /* raw perf buffer options, giving most power and control */
466 struct perf_buffer_raw_opts
{
467 /* perf event attrs passed directly into perf_event_open() */
468 struct perf_event_attr
*attr
;
469 /* raw event callback */
470 perf_buffer_event_fn event_cb
;
471 /* ctx is provided to event_cb */
473 /* if cpu_cnt == 0, open all on all possible CPUs (up to the number of
474 * max_entries of given PERF_EVENT_ARRAY map)
477 /* if cpu_cnt > 0, cpus is an array of CPUs to open ring buffers on */
479 /* if cpu_cnt > 0, map_keys specify map keys to set per-CPU FDs for */
483 LIBBPF_API
struct perf_buffer
*
484 perf_buffer__new_raw(int map_fd
, size_t page_cnt
,
485 const struct perf_buffer_raw_opts
*opts
);
487 LIBBPF_API
void perf_buffer__free(struct perf_buffer
*pb
);
488 LIBBPF_API
int perf_buffer__poll(struct perf_buffer
*pb
, int timeout_ms
);
490 typedef enum bpf_perf_event_ret
491 (*bpf_perf_event_print_t
)(struct perf_event_header
*hdr
,
493 LIBBPF_API
enum bpf_perf_event_ret
494 bpf_perf_event_read_simple(void *mmap_mem
, size_t mmap_size
, size_t page_size
,
495 void **copy_mem
, size_t *copy_size
,
496 bpf_perf_event_print_t fn
, void *private_data
);
498 struct bpf_prog_linfo
;
499 struct bpf_prog_info
;
501 LIBBPF_API
void bpf_prog_linfo__free(struct bpf_prog_linfo
*prog_linfo
);
502 LIBBPF_API
struct bpf_prog_linfo
*
503 bpf_prog_linfo__new(const struct bpf_prog_info
*info
);
504 LIBBPF_API
const struct bpf_line_info
*
505 bpf_prog_linfo__lfind_addr_func(const struct bpf_prog_linfo
*prog_linfo
,
506 __u64 addr
, __u32 func_idx
, __u32 nr_skip
);
507 LIBBPF_API
const struct bpf_line_info
*
508 bpf_prog_linfo__lfind(const struct bpf_prog_linfo
*prog_linfo
,
509 __u32 insn_off
, __u32 nr_skip
);
512 * Probe for supported system features
514 * Note that running many of these probes in a short amount of time can cause
515 * the kernel to reach the maximal size of lockable memory allowed for the
516 * user, causing subsequent probes to fail. In this case, the caller may want
517 * to adjust that limit with setrlimit().
519 LIBBPF_API
bool bpf_probe_prog_type(enum bpf_prog_type prog_type
,
521 LIBBPF_API
bool bpf_probe_map_type(enum bpf_map_type map_type
, __u32 ifindex
);
522 LIBBPF_API
bool bpf_probe_helper(enum bpf_func_id id
,
523 enum bpf_prog_type prog_type
, __u32 ifindex
);
526 * Get bpf_prog_info in continuous memory
528 * struct bpf_prog_info has multiple arrays. The user has option to choose
529 * arrays to fetch from kernel. The following APIs provide an uniform way to
530 * fetch these data. All arrays in bpf_prog_info are stored in a single
531 * continuous memory region. This makes it easy to store the info in a
534 * Before writing bpf_prog_info_linear to files, it is necessary to
535 * translate pointers in bpf_prog_info to offsets. Helper functions
536 * bpf_program__bpil_addr_to_offs() and bpf_program__bpil_offs_to_addr()
537 * are introduced to switch between pointers and offsets.
540 * # To fetch map_ids and prog_tags:
541 * __u64 arrays = (1UL << BPF_PROG_INFO_MAP_IDS) |
542 * (1UL << BPF_PROG_INFO_PROG_TAGS);
543 * struct bpf_prog_info_linear *info_linear =
544 * bpf_program__get_prog_info_linear(fd, arrays);
546 * # To save data in file
547 * bpf_program__bpil_addr_to_offs(info_linear);
548 * write(f, info_linear, sizeof(*info_linear) + info_linear->data_len);
550 * # To read data from file
551 * read(f, info_linear, <proper_size>);
552 * bpf_program__bpil_offs_to_addr(info_linear);
554 enum bpf_prog_info_array
{
555 BPF_PROG_INFO_FIRST_ARRAY
= 0,
556 BPF_PROG_INFO_JITED_INSNS
= 0,
557 BPF_PROG_INFO_XLATED_INSNS
,
558 BPF_PROG_INFO_MAP_IDS
,
559 BPF_PROG_INFO_JITED_KSYMS
,
560 BPF_PROG_INFO_JITED_FUNC_LENS
,
561 BPF_PROG_INFO_FUNC_INFO
,
562 BPF_PROG_INFO_LINE_INFO
,
563 BPF_PROG_INFO_JITED_LINE_INFO
,
564 BPF_PROG_INFO_PROG_TAGS
,
565 BPF_PROG_INFO_LAST_ARRAY
,
568 struct bpf_prog_info_linear
{
569 /* size of struct bpf_prog_info, when the tool is compiled */
571 /* total bytes allocated for data, round up to 8 bytes */
573 /* which arrays are included in data */
575 struct bpf_prog_info info
;
579 LIBBPF_API
struct bpf_prog_info_linear
*
580 bpf_program__get_prog_info_linear(int fd
, __u64 arrays
);
583 bpf_program__bpil_addr_to_offs(struct bpf_prog_info_linear
*info_linear
);
586 bpf_program__bpil_offs_to_addr(struct bpf_prog_info_linear
*info_linear
);
589 * A helper function to get the number of possible CPUs before looking up
590 * per-CPU maps. Negative errno is returned on failure.
594 * int ncpus = libbpf_num_possible_cpus();
598 * long values[ncpus];
599 * bpf_map_lookup_elem(per_cpu_map_fd, key, values);
602 LIBBPF_API
int libbpf_num_possible_cpus(void);
604 struct bpf_map_skeleton
{
606 struct bpf_map
**map
;
610 struct bpf_prog_skeleton
{
612 struct bpf_program
**prog
;
613 struct bpf_link
**link
;
616 struct bpf_object_skeleton
{
617 size_t sz
; /* size of this struct, for forward/backward compatibility */
623 struct bpf_object
**obj
;
626 int map_skel_sz
; /* sizeof(struct bpf_skeleton_map) */
627 struct bpf_map_skeleton
*maps
;
630 int prog_skel_sz
; /* sizeof(struct bpf_skeleton_prog) */
631 struct bpf_prog_skeleton
*progs
;
635 bpf_object__open_skeleton(struct bpf_object_skeleton
*s
,
636 const struct bpf_object_open_opts
*opts
);
637 LIBBPF_API
int bpf_object__load_skeleton(struct bpf_object_skeleton
*s
);
638 LIBBPF_API
int bpf_object__attach_skeleton(struct bpf_object_skeleton
*s
);
639 LIBBPF_API
void bpf_object__detach_skeleton(struct bpf_object_skeleton
*s
);
640 LIBBPF_API
void bpf_object__destroy_skeleton(struct bpf_object_skeleton
*s
);
642 enum libbpf_tristate
{
652 #endif /* __LIBBPF_LIBBPF_H */