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1// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
2
3/*
4 * common eBPF ELF operations.
5 *
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.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation;
13 * version 2.1 of the License (not later!)
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this program; if not, see <http://www.gnu.org/licenses>
22 */
23
24#include <stdlib.h>
25#include <string.h>
26#include <memory.h>
27#include <unistd.h>
28#include <asm/unistd.h>
29#include <errno.h>
30#include <linux/bpf.h>
31#include "bpf.h"
32#include "libbpf.h"
33#include "libbpf_internal.h"
34
35/* make sure libbpf doesn't use kernel-only integer typedefs */
36#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
37
38/*
39 * When building perf, unistd.h is overridden. __NR_bpf is
40 * required to be defined explicitly.
41 */
42#ifndef __NR_bpf
43# if defined(__i386__)
44# define __NR_bpf 357
45# elif defined(__x86_64__)
46# define __NR_bpf 321
47# elif defined(__aarch64__)
48# define __NR_bpf 280
49# elif defined(__sparc__)
50# define __NR_bpf 349
51# elif defined(__s390__)
52# define __NR_bpf 351
53# elif defined(__arc__)
54# define __NR_bpf 280
55# else
56# error __NR_bpf not defined. libbpf does not support your arch.
57# endif
58#endif
59
60static inline __u64 ptr_to_u64(const void *ptr)
61{
62 return (__u64) (unsigned long) ptr;
63}
64
65static inline int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr,
66 unsigned int size)
67{
68 return syscall(__NR_bpf, cmd, attr, size);
69}
70
71static inline int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size)
72{
73 int fd;
74
75 do {
76 fd = sys_bpf(BPF_PROG_LOAD, attr, size);
77 } while (fd < 0 && errno == EAGAIN);
78
79 return fd;
80}
81
82int bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr)
83{
84 union bpf_attr attr;
85
86 memset(&attr, '\0', sizeof(attr));
87
88 attr.map_type = create_attr->map_type;
89 attr.key_size = create_attr->key_size;
90 attr.value_size = create_attr->value_size;
91 attr.max_entries = create_attr->max_entries;
92 attr.map_flags = create_attr->map_flags;
93 if (create_attr->name)
94 memcpy(attr.map_name, create_attr->name,
95 min(strlen(create_attr->name), BPF_OBJ_NAME_LEN - 1));
96 attr.numa_node = create_attr->numa_node;
97 attr.btf_fd = create_attr->btf_fd;
98 attr.btf_key_type_id = create_attr->btf_key_type_id;
99 attr.btf_value_type_id = create_attr->btf_value_type_id;
100 attr.map_ifindex = create_attr->map_ifindex;
101 if (attr.map_type == BPF_MAP_TYPE_STRUCT_OPS)
102 attr.btf_vmlinux_value_type_id =
103 create_attr->btf_vmlinux_value_type_id;
104 else
105 attr.inner_map_fd = create_attr->inner_map_fd;
106
107 return sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
108}
109
110int bpf_create_map_node(enum bpf_map_type map_type, const char *name,
111 int key_size, int value_size, int max_entries,
112 __u32 map_flags, int node)
113{
114 struct bpf_create_map_attr map_attr = {};
115
116 map_attr.name = name;
117 map_attr.map_type = map_type;
118 map_attr.map_flags = map_flags;
119 map_attr.key_size = key_size;
120 map_attr.value_size = value_size;
121 map_attr.max_entries = max_entries;
122 if (node >= 0) {
123 map_attr.numa_node = node;
124 map_attr.map_flags |= BPF_F_NUMA_NODE;
125 }
126
127 return bpf_create_map_xattr(&map_attr);
128}
129
130int bpf_create_map(enum bpf_map_type map_type, int key_size,
131 int value_size, int max_entries, __u32 map_flags)
132{
133 struct bpf_create_map_attr map_attr = {};
134
135 map_attr.map_type = map_type;
136 map_attr.map_flags = map_flags;
137 map_attr.key_size = key_size;
138 map_attr.value_size = value_size;
139 map_attr.max_entries = max_entries;
140
141 return bpf_create_map_xattr(&map_attr);
142}
143
144int bpf_create_map_name(enum bpf_map_type map_type, const char *name,
145 int key_size, int value_size, int max_entries,
146 __u32 map_flags)
147{
148 struct bpf_create_map_attr map_attr = {};
149
150 map_attr.name = name;
151 map_attr.map_type = map_type;
152 map_attr.map_flags = map_flags;
153 map_attr.key_size = key_size;
154 map_attr.value_size = value_size;
155 map_attr.max_entries = max_entries;
156
157 return bpf_create_map_xattr(&map_attr);
158}
159
160int bpf_create_map_in_map_node(enum bpf_map_type map_type, const char *name,
161 int key_size, int inner_map_fd, int max_entries,
162 __u32 map_flags, int node)
163{
164 union bpf_attr attr;
165
166 memset(&attr, '\0', sizeof(attr));
167
168 attr.map_type = map_type;
169 attr.key_size = key_size;
170 attr.value_size = 4;
171 attr.inner_map_fd = inner_map_fd;
172 attr.max_entries = max_entries;
173 attr.map_flags = map_flags;
174 if (name)
175 memcpy(attr.map_name, name,
176 min(strlen(name), BPF_OBJ_NAME_LEN - 1));
177
178 if (node >= 0) {
179 attr.map_flags |= BPF_F_NUMA_NODE;
180 attr.numa_node = node;
181 }
182
183 return sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
184}
185
186int bpf_create_map_in_map(enum bpf_map_type map_type, const char *name,
187 int key_size, int inner_map_fd, int max_entries,
188 __u32 map_flags)
189{
190 return bpf_create_map_in_map_node(map_type, name, key_size,
191 inner_map_fd, max_entries, map_flags,
192 -1);
193}
194
195static void *
196alloc_zero_tailing_info(const void *orecord, __u32 cnt,
197 __u32 actual_rec_size, __u32 expected_rec_size)
198{
199 __u64 info_len = (__u64)actual_rec_size * cnt;
200 void *info, *nrecord;
201 int i;
202
203 info = malloc(info_len);
204 if (!info)
205 return NULL;
206
207 /* zero out bytes kernel does not understand */
208 nrecord = info;
209 for (i = 0; i < cnt; i++) {
210 memcpy(nrecord, orecord, expected_rec_size);
211 memset(nrecord + expected_rec_size, 0,
212 actual_rec_size - expected_rec_size);
213 orecord += actual_rec_size;
214 nrecord += actual_rec_size;
215 }
216
217 return info;
218}
219
220int bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
221 char *log_buf, size_t log_buf_sz)
222{
223 void *finfo = NULL, *linfo = NULL;
224 union bpf_attr attr;
225 __u32 log_level;
226 int fd;
227
228 if (!load_attr || !log_buf != !log_buf_sz)
229 return -EINVAL;
230
231 log_level = load_attr->log_level;
232 if (log_level > (4 | 2 | 1) || (log_level && !log_buf))
233 return -EINVAL;
234
235 memset(&attr, 0, sizeof(attr));
236 attr.prog_type = load_attr->prog_type;
237 attr.expected_attach_type = load_attr->expected_attach_type;
238 if (attr.prog_type == BPF_PROG_TYPE_STRUCT_OPS ||
239 attr.prog_type == BPF_PROG_TYPE_LSM) {
240 attr.attach_btf_id = load_attr->attach_btf_id;
241 } else if (attr.prog_type == BPF_PROG_TYPE_TRACING ||
242 attr.prog_type == BPF_PROG_TYPE_EXT) {
243 attr.attach_btf_id = load_attr->attach_btf_id;
244 attr.attach_prog_fd = load_attr->attach_prog_fd;
245 } else {
246 attr.prog_ifindex = load_attr->prog_ifindex;
247 attr.kern_version = load_attr->kern_version;
248 }
249 attr.insn_cnt = (__u32)load_attr->insns_cnt;
250 attr.insns = ptr_to_u64(load_attr->insns);
251 attr.license = ptr_to_u64(load_attr->license);
252
253 attr.log_level = log_level;
254 if (log_level) {
255 attr.log_buf = ptr_to_u64(log_buf);
256 attr.log_size = log_buf_sz;
257 } else {
258 attr.log_buf = ptr_to_u64(NULL);
259 attr.log_size = 0;
260 }
261
262 attr.prog_btf_fd = load_attr->prog_btf_fd;
263 attr.func_info_rec_size = load_attr->func_info_rec_size;
264 attr.func_info_cnt = load_attr->func_info_cnt;
265 attr.func_info = ptr_to_u64(load_attr->func_info);
266 attr.line_info_rec_size = load_attr->line_info_rec_size;
267 attr.line_info_cnt = load_attr->line_info_cnt;
268 attr.line_info = ptr_to_u64(load_attr->line_info);
269 if (load_attr->name)
270 memcpy(attr.prog_name, load_attr->name,
271 min(strlen(load_attr->name), BPF_OBJ_NAME_LEN - 1));
272 attr.prog_flags = load_attr->prog_flags;
273
274 fd = sys_bpf_prog_load(&attr, sizeof(attr));
275 if (fd >= 0)
276 return fd;
277
278 /* After bpf_prog_load, the kernel may modify certain attributes
279 * to give user space a hint how to deal with loading failure.
280 * Check to see whether we can make some changes and load again.
281 */
282 while (errno == E2BIG && (!finfo || !linfo)) {
283 if (!finfo && attr.func_info_cnt &&
284 attr.func_info_rec_size < load_attr->func_info_rec_size) {
285 /* try with corrected func info records */
286 finfo = alloc_zero_tailing_info(load_attr->func_info,
287 load_attr->func_info_cnt,
288 load_attr->func_info_rec_size,
289 attr.func_info_rec_size);
290 if (!finfo)
291 goto done;
292
293 attr.func_info = ptr_to_u64(finfo);
294 attr.func_info_rec_size = load_attr->func_info_rec_size;
295 } else if (!linfo && attr.line_info_cnt &&
296 attr.line_info_rec_size <
297 load_attr->line_info_rec_size) {
298 linfo = alloc_zero_tailing_info(load_attr->line_info,
299 load_attr->line_info_cnt,
300 load_attr->line_info_rec_size,
301 attr.line_info_rec_size);
302 if (!linfo)
303 goto done;
304
305 attr.line_info = ptr_to_u64(linfo);
306 attr.line_info_rec_size = load_attr->line_info_rec_size;
307 } else {
308 break;
309 }
310
311 fd = sys_bpf_prog_load(&attr, sizeof(attr));
312
313 if (fd >= 0)
314 goto done;
315 }
316
317 if (log_level || !log_buf)
318 goto done;
319
320 /* Try again with log */
321 attr.log_buf = ptr_to_u64(log_buf);
322 attr.log_size = log_buf_sz;
323 attr.log_level = 1;
324 log_buf[0] = 0;
325 fd = sys_bpf_prog_load(&attr, sizeof(attr));
326done:
327 free(finfo);
328 free(linfo);
329 return fd;
330}
331
332int bpf_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
333 size_t insns_cnt, const char *license,
334 __u32 kern_version, char *log_buf,
335 size_t log_buf_sz)
336{
337 struct bpf_load_program_attr load_attr;
338
339 memset(&load_attr, 0, sizeof(struct bpf_load_program_attr));
340 load_attr.prog_type = type;
341 load_attr.expected_attach_type = 0;
342 load_attr.name = NULL;
343 load_attr.insns = insns;
344 load_attr.insns_cnt = insns_cnt;
345 load_attr.license = license;
346 load_attr.kern_version = kern_version;
347
348 return bpf_load_program_xattr(&load_attr, log_buf, log_buf_sz);
349}
350
351int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns,
352 size_t insns_cnt, __u32 prog_flags, const char *license,
353 __u32 kern_version, char *log_buf, size_t log_buf_sz,
354 int log_level)
355{
356 union bpf_attr attr;
357
358 memset(&attr, 0, sizeof(attr));
359 attr.prog_type = type;
360 attr.insn_cnt = (__u32)insns_cnt;
361 attr.insns = ptr_to_u64(insns);
362 attr.license = ptr_to_u64(license);
363 attr.log_buf = ptr_to_u64(log_buf);
364 attr.log_size = log_buf_sz;
365 attr.log_level = log_level;
366 log_buf[0] = 0;
367 attr.kern_version = kern_version;
368 attr.prog_flags = prog_flags;
369
370 return sys_bpf_prog_load(&attr, sizeof(attr));
371}
372
373int bpf_map_update_elem(int fd, const void *key, const void *value,
374 __u64 flags)
375{
376 union bpf_attr attr;
377
378 memset(&attr, 0, sizeof(attr));
379 attr.map_fd = fd;
380 attr.key = ptr_to_u64(key);
381 attr.value = ptr_to_u64(value);
382 attr.flags = flags;
383
384 return sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
385}
386
387int bpf_map_lookup_elem(int fd, const void *key, void *value)
388{
389 union bpf_attr attr;
390
391 memset(&attr, 0, sizeof(attr));
392 attr.map_fd = fd;
393 attr.key = ptr_to_u64(key);
394 attr.value = ptr_to_u64(value);
395
396 return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
397}
398
399int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags)
400{
401 union bpf_attr attr;
402
403 memset(&attr, 0, sizeof(attr));
404 attr.map_fd = fd;
405 attr.key = ptr_to_u64(key);
406 attr.value = ptr_to_u64(value);
407 attr.flags = flags;
408
409 return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
410}
411
412int bpf_map_lookup_and_delete_elem(int fd, const void *key, void *value)
413{
414 union bpf_attr attr;
415
416 memset(&attr, 0, sizeof(attr));
417 attr.map_fd = fd;
418 attr.key = ptr_to_u64(key);
419 attr.value = ptr_to_u64(value);
420
421 return sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, sizeof(attr));
422}
423
424int bpf_map_delete_elem(int fd, const void *key)
425{
426 union bpf_attr attr;
427
428 memset(&attr, 0, sizeof(attr));
429 attr.map_fd = fd;
430 attr.key = ptr_to_u64(key);
431
432 return sys_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
433}
434
435int bpf_map_get_next_key(int fd, const void *key, void *next_key)
436{
437 union bpf_attr attr;
438
439 memset(&attr, 0, sizeof(attr));
440 attr.map_fd = fd;
441 attr.key = ptr_to_u64(key);
442 attr.next_key = ptr_to_u64(next_key);
443
444 return sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr));
445}
446
447int bpf_map_freeze(int fd)
448{
449 union bpf_attr attr;
450
451 memset(&attr, 0, sizeof(attr));
452 attr.map_fd = fd;
453
454 return sys_bpf(BPF_MAP_FREEZE, &attr, sizeof(attr));
455}
456
457static int bpf_map_batch_common(int cmd, int fd, void *in_batch,
458 void *out_batch, void *keys, void *values,
459 __u32 *count,
460 const struct bpf_map_batch_opts *opts)
461{
462 union bpf_attr attr;
463 int ret;
464
465 if (!OPTS_VALID(opts, bpf_map_batch_opts))
466 return -EINVAL;
467
468 memset(&attr, 0, sizeof(attr));
469 attr.batch.map_fd = fd;
470 attr.batch.in_batch = ptr_to_u64(in_batch);
471 attr.batch.out_batch = ptr_to_u64(out_batch);
472 attr.batch.keys = ptr_to_u64(keys);
473 attr.batch.values = ptr_to_u64(values);
474 attr.batch.count = *count;
475 attr.batch.elem_flags = OPTS_GET(opts, elem_flags, 0);
476 attr.batch.flags = OPTS_GET(opts, flags, 0);
477
478 ret = sys_bpf(cmd, &attr, sizeof(attr));
479 *count = attr.batch.count;
480
481 return ret;
482}
483
484int bpf_map_delete_batch(int fd, void *keys, __u32 *count,
485 const struct bpf_map_batch_opts *opts)
486{
487 return bpf_map_batch_common(BPF_MAP_DELETE_BATCH, fd, NULL,
488 NULL, keys, NULL, count, opts);
489}
490
491int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch, void *keys,
492 void *values, __u32 *count,
493 const struct bpf_map_batch_opts *opts)
494{
495 return bpf_map_batch_common(BPF_MAP_LOOKUP_BATCH, fd, in_batch,
496 out_batch, keys, values, count, opts);
497}
498
499int bpf_map_lookup_and_delete_batch(int fd, void *in_batch, void *out_batch,
500 void *keys, void *values, __u32 *count,
501 const struct bpf_map_batch_opts *opts)
502{
503 return bpf_map_batch_common(BPF_MAP_LOOKUP_AND_DELETE_BATCH,
504 fd, in_batch, out_batch, keys, values,
505 count, opts);
506}
507
508int bpf_map_update_batch(int fd, void *keys, void *values, __u32 *count,
509 const struct bpf_map_batch_opts *opts)
510{
511 return bpf_map_batch_common(BPF_MAP_UPDATE_BATCH, fd, NULL, NULL,
512 keys, values, count, opts);
513}
514
515int bpf_obj_pin(int fd, const char *pathname)
516{
517 union bpf_attr attr;
518
519 memset(&attr, 0, sizeof(attr));
520 attr.pathname = ptr_to_u64((void *)pathname);
521 attr.bpf_fd = fd;
522
523 return sys_bpf(BPF_OBJ_PIN, &attr, sizeof(attr));
524}
525
526int bpf_obj_get(const char *pathname)
527{
528 union bpf_attr attr;
529
530 memset(&attr, 0, sizeof(attr));
531 attr.pathname = ptr_to_u64((void *)pathname);
532
533 return sys_bpf(BPF_OBJ_GET, &attr, sizeof(attr));
534}
535
536int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type,
537 unsigned int flags)
538{
539 DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opts,
540 .flags = flags,
541 );
542
543 return bpf_prog_attach_xattr(prog_fd, target_fd, type, &opts);
544}
545
546int bpf_prog_attach_xattr(int prog_fd, int target_fd,
547 enum bpf_attach_type type,
548 const struct bpf_prog_attach_opts *opts)
549{
550 union bpf_attr attr;
551
552 if (!OPTS_VALID(opts, bpf_prog_attach_opts))
553 return -EINVAL;
554
555 memset(&attr, 0, sizeof(attr));
556 attr.target_fd = target_fd;
557 attr.attach_bpf_fd = prog_fd;
558 attr.attach_type = type;
559 attr.attach_flags = OPTS_GET(opts, flags, 0);
560 attr.replace_bpf_fd = OPTS_GET(opts, replace_prog_fd, 0);
561
562 return sys_bpf(BPF_PROG_ATTACH, &attr, sizeof(attr));
563}
564
565int bpf_prog_detach(int target_fd, enum bpf_attach_type type)
566{
567 union bpf_attr attr;
568
569 memset(&attr, 0, sizeof(attr));
570 attr.target_fd = target_fd;
571 attr.attach_type = type;
572
573 return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
574}
575
576int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type)
577{
578 union bpf_attr attr;
579
580 memset(&attr, 0, sizeof(attr));
581 attr.target_fd = target_fd;
582 attr.attach_bpf_fd = prog_fd;
583 attr.attach_type = type;
584
585 return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
586}
587
588int bpf_link_create(int prog_fd, int target_fd,
589 enum bpf_attach_type attach_type,
590 const struct bpf_link_create_opts *opts)
591{
592 union bpf_attr attr;
593
594 if (!OPTS_VALID(opts, bpf_link_create_opts))
595 return -EINVAL;
596
597 memset(&attr, 0, sizeof(attr));
598 attr.link_create.prog_fd = prog_fd;
599 attr.link_create.target_fd = target_fd;
600 attr.link_create.attach_type = attach_type;
601 attr.link_create.flags = OPTS_GET(opts, flags, 0);
602 attr.link_create.iter_info =
603 ptr_to_u64(OPTS_GET(opts, iter_info, (void *)0));
604 attr.link_create.iter_info_len = OPTS_GET(opts, iter_info_len, 0);
605
606 return sys_bpf(BPF_LINK_CREATE, &attr, sizeof(attr));
607}
608
609int bpf_link_detach(int link_fd)
610{
611 union bpf_attr attr;
612
613 memset(&attr, 0, sizeof(attr));
614 attr.link_detach.link_fd = link_fd;
615
616 return sys_bpf(BPF_LINK_DETACH, &attr, sizeof(attr));
617}
618
619int bpf_link_update(int link_fd, int new_prog_fd,
620 const struct bpf_link_update_opts *opts)
621{
622 union bpf_attr attr;
623
624 if (!OPTS_VALID(opts, bpf_link_update_opts))
625 return -EINVAL;
626
627 memset(&attr, 0, sizeof(attr));
628 attr.link_update.link_fd = link_fd;
629 attr.link_update.new_prog_fd = new_prog_fd;
630 attr.link_update.flags = OPTS_GET(opts, flags, 0);
631 attr.link_update.old_prog_fd = OPTS_GET(opts, old_prog_fd, 0);
632
633 return sys_bpf(BPF_LINK_UPDATE, &attr, sizeof(attr));
634}
635
636int bpf_iter_create(int link_fd)
637{
638 union bpf_attr attr;
639
640 memset(&attr, 0, sizeof(attr));
641 attr.iter_create.link_fd = link_fd;
642
643 return sys_bpf(BPF_ITER_CREATE, &attr, sizeof(attr));
644}
645
646int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
647 __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt)
648{
649 union bpf_attr attr;
650 int ret;
651
652 memset(&attr, 0, sizeof(attr));
653 attr.query.target_fd = target_fd;
654 attr.query.attach_type = type;
655 attr.query.query_flags = query_flags;
656 attr.query.prog_cnt = *prog_cnt;
657 attr.query.prog_ids = ptr_to_u64(prog_ids);
658
659 ret = sys_bpf(BPF_PROG_QUERY, &attr, sizeof(attr));
660 if (attach_flags)
661 *attach_flags = attr.query.attach_flags;
662 *prog_cnt = attr.query.prog_cnt;
663 return ret;
664}
665
666int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
667 void *data_out, __u32 *size_out, __u32 *retval,
668 __u32 *duration)
669{
670 union bpf_attr attr;
671 int ret;
672
673 memset(&attr, 0, sizeof(attr));
674 attr.test.prog_fd = prog_fd;
675 attr.test.data_in = ptr_to_u64(data);
676 attr.test.data_out = ptr_to_u64(data_out);
677 attr.test.data_size_in = size;
678 attr.test.repeat = repeat;
679
680 ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
681 if (size_out)
682 *size_out = attr.test.data_size_out;
683 if (retval)
684 *retval = attr.test.retval;
685 if (duration)
686 *duration = attr.test.duration;
687 return ret;
688}
689
690int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
691{
692 union bpf_attr attr;
693 int ret;
694
695 if (!test_attr->data_out && test_attr->data_size_out > 0)
696 return -EINVAL;
697
698 memset(&attr, 0, sizeof(attr));
699 attr.test.prog_fd = test_attr->prog_fd;
700 attr.test.data_in = ptr_to_u64(test_attr->data_in);
701 attr.test.data_out = ptr_to_u64(test_attr->data_out);
702 attr.test.data_size_in = test_attr->data_size_in;
703 attr.test.data_size_out = test_attr->data_size_out;
704 attr.test.ctx_in = ptr_to_u64(test_attr->ctx_in);
705 attr.test.ctx_out = ptr_to_u64(test_attr->ctx_out);
706 attr.test.ctx_size_in = test_attr->ctx_size_in;
707 attr.test.ctx_size_out = test_attr->ctx_size_out;
708 attr.test.repeat = test_attr->repeat;
709
710 ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
711 test_attr->data_size_out = attr.test.data_size_out;
712 test_attr->ctx_size_out = attr.test.ctx_size_out;
713 test_attr->retval = attr.test.retval;
714 test_attr->duration = attr.test.duration;
715 return ret;
716}
717
718static int bpf_obj_get_next_id(__u32 start_id, __u32 *next_id, int cmd)
719{
720 union bpf_attr attr;
721 int err;
722
723 memset(&attr, 0, sizeof(attr));
724 attr.start_id = start_id;
725
726 err = sys_bpf(cmd, &attr, sizeof(attr));
727 if (!err)
728 *next_id = attr.next_id;
729
730 return err;
731}
732
733int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id)
734{
735 return bpf_obj_get_next_id(start_id, next_id, BPF_PROG_GET_NEXT_ID);
736}
737
738int bpf_map_get_next_id(__u32 start_id, __u32 *next_id)
739{
740 return bpf_obj_get_next_id(start_id, next_id, BPF_MAP_GET_NEXT_ID);
741}
742
743int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id)
744{
745 return bpf_obj_get_next_id(start_id, next_id, BPF_BTF_GET_NEXT_ID);
746}
747
748int bpf_link_get_next_id(__u32 start_id, __u32 *next_id)
749{
750 return bpf_obj_get_next_id(start_id, next_id, BPF_LINK_GET_NEXT_ID);
751}
752
753int bpf_prog_get_fd_by_id(__u32 id)
754{
755 union bpf_attr attr;
756
757 memset(&attr, 0, sizeof(attr));
758 attr.prog_id = id;
759
760 return sys_bpf(BPF_PROG_GET_FD_BY_ID, &attr, sizeof(attr));
761}
762
763int bpf_map_get_fd_by_id(__u32 id)
764{
765 union bpf_attr attr;
766
767 memset(&attr, 0, sizeof(attr));
768 attr.map_id = id;
769
770 return sys_bpf(BPF_MAP_GET_FD_BY_ID, &attr, sizeof(attr));
771}
772
773int bpf_btf_get_fd_by_id(__u32 id)
774{
775 union bpf_attr attr;
776
777 memset(&attr, 0, sizeof(attr));
778 attr.btf_id = id;
779
780 return sys_bpf(BPF_BTF_GET_FD_BY_ID, &attr, sizeof(attr));
781}
782
783int bpf_link_get_fd_by_id(__u32 id)
784{
785 union bpf_attr attr;
786
787 memset(&attr, 0, sizeof(attr));
788 attr.link_id = id;
789
790 return sys_bpf(BPF_LINK_GET_FD_BY_ID, &attr, sizeof(attr));
791}
792
793int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len)
794{
795 union bpf_attr attr;
796 int err;
797
798 memset(&attr, 0, sizeof(attr));
799 attr.info.bpf_fd = bpf_fd;
800 attr.info.info_len = *info_len;
801 attr.info.info = ptr_to_u64(info);
802
803 err = sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
804 if (!err)
805 *info_len = attr.info.info_len;
806
807 return err;
808}
809
810int bpf_raw_tracepoint_open(const char *name, int prog_fd)
811{
812 union bpf_attr attr;
813
814 memset(&attr, 0, sizeof(attr));
815 attr.raw_tracepoint.name = ptr_to_u64(name);
816 attr.raw_tracepoint.prog_fd = prog_fd;
817
818 return sys_bpf(BPF_RAW_TRACEPOINT_OPEN, &attr, sizeof(attr));
819}
820
821int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf, __u32 log_buf_size,
822 bool do_log)
823{
824 union bpf_attr attr = {};
825 int fd;
826
827 attr.btf = ptr_to_u64(btf);
828 attr.btf_size = btf_size;
829
830retry:
831 if (do_log && log_buf && log_buf_size) {
832 attr.btf_log_level = 1;
833 attr.btf_log_size = log_buf_size;
834 attr.btf_log_buf = ptr_to_u64(log_buf);
835 }
836
837 fd = sys_bpf(BPF_BTF_LOAD, &attr, sizeof(attr));
838 if (fd == -1 && !do_log && log_buf && log_buf_size) {
839 do_log = true;
840 goto retry;
841 }
842
843 return fd;
844}
845
846int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
847 __u32 *prog_id, __u32 *fd_type, __u64 *probe_offset,
848 __u64 *probe_addr)
849{
850 union bpf_attr attr = {};
851 int err;
852
853 attr.task_fd_query.pid = pid;
854 attr.task_fd_query.fd = fd;
855 attr.task_fd_query.flags = flags;
856 attr.task_fd_query.buf = ptr_to_u64(buf);
857 attr.task_fd_query.buf_len = *buf_len;
858
859 err = sys_bpf(BPF_TASK_FD_QUERY, &attr, sizeof(attr));
860 *buf_len = attr.task_fd_query.buf_len;
861 *prog_id = attr.task_fd_query.prog_id;
862 *fd_type = attr.task_fd_query.fd_type;
863 *probe_offset = attr.task_fd_query.probe_offset;
864 *probe_addr = attr.task_fd_query.probe_addr;
865
866 return err;
867}
868
869int bpf_enable_stats(enum bpf_stats_type type)
870{
871 union bpf_attr attr;
872
873 memset(&attr, 0, sizeof(attr));
874 attr.enable_stats.type = type;
875
876 return sys_bpf(BPF_ENABLE_STATS, &attr, sizeof(attr));
877}