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1bc38b8f | 1 | // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) |
6061a3d6 | 2 | |
e3ed2fef WN |
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. | |
203d1cac WN |
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> | |
e3ed2fef WN |
22 | */ |
23 | ||
24 | #include <stdlib.h> | |
1ad9cbb8 | 25 | #include <string.h> |
e3ed2fef WN |
26 | #include <memory.h> |
27 | #include <unistd.h> | |
28 | #include <asm/unistd.h> | |
d7fe74f9 | 29 | #include <errno.h> |
e3ed2fef | 30 | #include <linux/bpf.h> |
e542f2c4 | 31 | #include <linux/filter.h> |
04b6de64 | 32 | #include <linux/kernel.h> |
d10ef2b8 | 33 | #include <limits.h> |
e542f2c4 | 34 | #include <sys/resource.h> |
e3ed2fef | 35 | #include "bpf.h" |
949abbe8 | 36 | #include "libbpf.h" |
d7fe74f9 | 37 | #include "libbpf_internal.h" |
e3ed2fef WN |
38 | |
39 | /* | |
03671057 | 40 | * When building perf, unistd.h is overridden. __NR_bpf is |
8f9e05fb | 41 | * required to be defined explicitly. |
e3ed2fef WN |
42 | */ |
43 | #ifndef __NR_bpf | |
44 | # if defined(__i386__) | |
45 | # define __NR_bpf 357 | |
46 | # elif defined(__x86_64__) | |
47 | # define __NR_bpf 321 | |
48 | # elif defined(__aarch64__) | |
49 | # define __NR_bpf 280 | |
b0c47807 DM |
50 | # elif defined(__sparc__) |
51 | # define __NR_bpf 349 | |
bad1926d DB |
52 | # elif defined(__s390__) |
53 | # define __NR_bpf 351 | |
ca31ca82 VG |
54 | # elif defined(__arc__) |
55 | # define __NR_bpf 280 | |
e32cb12f TY |
56 | # elif defined(__mips__) && defined(_ABIO32) |
57 | # define __NR_bpf 4355 | |
58 | # elif defined(__mips__) && defined(_ABIN32) | |
59 | # define __NR_bpf 6319 | |
60 | # elif defined(__mips__) && defined(_ABI64) | |
61 | # define __NR_bpf 5315 | |
e3ed2fef WN |
62 | # else |
63 | # error __NR_bpf not defined. libbpf does not support your arch. | |
64 | # endif | |
65 | #endif | |
66 | ||
cdc6a4ba | 67 | static inline __u64 ptr_to_u64(const void *ptr) |
7bf98369 WN |
68 | { |
69 | return (__u64) (unsigned long) ptr; | |
70 | } | |
71 | ||
cdc6a4ba MS |
72 | static inline int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr, |
73 | unsigned int size) | |
e3ed2fef WN |
74 | { |
75 | return syscall(__NR_bpf, cmd, attr, size); | |
76 | } | |
77 | ||
549a6323 KKD |
78 | static inline int sys_bpf_fd(enum bpf_cmd cmd, union bpf_attr *attr, |
79 | unsigned int size) | |
80 | { | |
81 | int fd; | |
82 | ||
83 | fd = sys_bpf(cmd, attr, size); | |
84 | return ensure_good_fd(fd); | |
85 | } | |
86 | ||
1f235777 | 87 | int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int attempts) |
86edaed3 LB |
88 | { |
89 | int fd; | |
90 | ||
91 | do { | |
549a6323 | 92 | fd = sys_bpf_fd(BPF_PROG_LOAD, attr, size); |
45493cba | 93 | } while (fd < 0 && errno == EAGAIN && --attempts > 0); |
86edaed3 LB |
94 | |
95 | return fd; | |
96 | } | |
97 | ||
e542f2c4 AN |
98 | /* Probe whether kernel switched from memlock-based (RLIMIT_MEMLOCK) to |
99 | * memcg-based memory accounting for BPF maps and progs. This was done in [0]. | |
100 | * We use the support for bpf_ktime_get_coarse_ns() helper, which was added in | |
101 | * the same 5.11 Linux release ([1]), to detect memcg-based accounting for BPF. | |
102 | * | |
103 | * [0] https://lore.kernel.org/bpf/20201201215900.3569844-1-guro@fb.com/ | |
104 | * [1] d05512618056 ("bpf: Add bpf_ktime_get_coarse_ns helper") | |
105 | */ | |
d17aff80 | 106 | int probe_memcg_account(void) |
e542f2c4 | 107 | { |
813847a3 | 108 | const size_t attr_sz = offsetofend(union bpf_attr, attach_btf_obj_fd); |
e542f2c4 AN |
109 | struct bpf_insn insns[] = { |
110 | BPF_EMIT_CALL(BPF_FUNC_ktime_get_coarse_ns), | |
111 | BPF_EXIT_INSN(), | |
112 | }; | |
04b6de64 | 113 | size_t insn_cnt = ARRAY_SIZE(insns); |
e542f2c4 AN |
114 | union bpf_attr attr; |
115 | int prog_fd; | |
116 | ||
117 | /* attempt loading freplace trying to use custom BTF */ | |
813847a3 | 118 | memset(&attr, 0, attr_sz); |
e542f2c4 AN |
119 | attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER; |
120 | attr.insns = ptr_to_u64(insns); | |
121 | attr.insn_cnt = insn_cnt; | |
122 | attr.license = ptr_to_u64("GPL"); | |
123 | ||
813847a3 | 124 | prog_fd = sys_bpf_fd(BPF_PROG_LOAD, &attr, attr_sz); |
e542f2c4 AN |
125 | if (prog_fd >= 0) { |
126 | close(prog_fd); | |
127 | return 1; | |
128 | } | |
129 | return 0; | |
130 | } | |
131 | ||
132 | static bool memlock_bumped; | |
133 | static rlim_t memlock_rlim = RLIM_INFINITY; | |
134 | ||
135 | int libbpf_set_memlock_rlim(size_t memlock_bytes) | |
136 | { | |
137 | if (memlock_bumped) | |
138 | return libbpf_err(-EBUSY); | |
139 | ||
140 | memlock_rlim = memlock_bytes; | |
141 | return 0; | |
142 | } | |
143 | ||
144 | int bump_rlimit_memlock(void) | |
145 | { | |
146 | struct rlimit rlim; | |
147 | ||
e542f2c4 | 148 | /* if kernel supports memcg-based accounting, skip bumping RLIMIT_MEMLOCK */ |
d17aff80 | 149 | if (memlock_bumped || kernel_supports(NULL, FEAT_MEMCG_ACCOUNT)) |
e542f2c4 AN |
150 | return 0; |
151 | ||
152 | memlock_bumped = true; | |
153 | ||
154 | /* zero memlock_rlim_max disables auto-bumping RLIMIT_MEMLOCK */ | |
155 | if (memlock_rlim == 0) | |
156 | return 0; | |
157 | ||
158 | rlim.rlim_cur = rlim.rlim_max = memlock_rlim; | |
159 | if (setrlimit(RLIMIT_MEMLOCK, &rlim)) | |
160 | return -errno; | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
992c4225 AN |
165 | int bpf_map_create(enum bpf_map_type map_type, |
166 | const char *map_name, | |
167 | __u32 key_size, | |
168 | __u32 value_size, | |
169 | __u32 max_entries, | |
170 | const struct bpf_map_create_opts *opts) | |
e3ed2fef | 171 | { |
d17aff80 | 172 | const size_t attr_sz = offsetofend(union bpf_attr, map_extra); |
e3ed2fef | 173 | union bpf_attr attr; |
f12b6543 | 174 | int fd; |
e3ed2fef | 175 | |
e542f2c4 AN |
176 | bump_rlimit_memlock(); |
177 | ||
992c4225 AN |
178 | memset(&attr, 0, attr_sz); |
179 | ||
180 | if (!OPTS_VALID(opts, bpf_map_create_opts)) | |
181 | return libbpf_err(-EINVAL); | |
182 | ||
183 | attr.map_type = map_type; | |
d17aff80 | 184 | if (map_name && kernel_supports(NULL, FEAT_PROG_NAME)) |
9fc205b4 | 185 | libbpf_strlcpy(attr.map_name, map_name, sizeof(attr.map_name)); |
992c4225 AN |
186 | attr.key_size = key_size; |
187 | attr.value_size = value_size; | |
188 | attr.max_entries = max_entries; | |
189 | ||
190 | attr.btf_fd = OPTS_GET(opts, btf_fd, 0); | |
191 | attr.btf_key_type_id = OPTS_GET(opts, btf_key_type_id, 0); | |
192 | attr.btf_value_type_id = OPTS_GET(opts, btf_value_type_id, 0); | |
193 | attr.btf_vmlinux_value_type_id = OPTS_GET(opts, btf_vmlinux_value_type_id, 0); | |
194 | ||
195 | attr.inner_map_fd = OPTS_GET(opts, inner_map_fd, 0); | |
196 | attr.map_flags = OPTS_GET(opts, map_flags, 0); | |
197 | attr.map_extra = OPTS_GET(opts, map_extra, 0); | |
198 | attr.numa_node = OPTS_GET(opts, numa_node, 0); | |
199 | attr.map_ifindex = OPTS_GET(opts, map_ifindex, 0); | |
8a138aed | 200 | |
992c4225 | 201 | fd = sys_bpf_fd(BPF_MAP_CREATE, &attr, attr_sz); |
f12b6543 | 202 | return libbpf_err_errno(fd); |
8a138aed | 203 | } |
88cda1c9 | 204 | |
3d650141 MKL |
205 | static void * |
206 | alloc_zero_tailing_info(const void *orecord, __u32 cnt, | |
207 | __u32 actual_rec_size, __u32 expected_rec_size) | |
208 | { | |
4ee11356 | 209 | __u64 info_len = (__u64)actual_rec_size * cnt; |
3d650141 MKL |
210 | void *info, *nrecord; |
211 | int i; | |
212 | ||
213 | info = malloc(info_len); | |
214 | if (!info) | |
215 | return NULL; | |
216 | ||
217 | /* zero out bytes kernel does not understand */ | |
218 | nrecord = info; | |
219 | for (i = 0; i < cnt; i++) { | |
220 | memcpy(nrecord, orecord, expected_rec_size); | |
221 | memset(nrecord + expected_rec_size, 0, | |
222 | actual_rec_size - expected_rec_size); | |
223 | orecord += actual_rec_size; | |
224 | nrecord += actual_rec_size; | |
225 | } | |
226 | ||
227 | return info; | |
228 | } | |
229 | ||
765a3413 AN |
230 | int bpf_prog_load(enum bpf_prog_type prog_type, |
231 | const char *prog_name, const char *license, | |
232 | const struct bpf_insn *insns, size_t insn_cnt, | |
94e55c0f | 233 | struct bpf_prog_load_opts *opts) |
7bf98369 | 234 | { |
d17aff80 | 235 | const size_t attr_sz = offsetofend(union bpf_attr, log_true_size); |
3d650141 | 236 | void *finfo = NULL, *linfo = NULL; |
d10ef2b8 AN |
237 | const char *func_info, *line_info; |
238 | __u32 log_size, log_level, attach_prog_fd, attach_btf_obj_fd; | |
239 | __u32 func_info_rec_size, line_info_rec_size; | |
240 | int fd, attempts; | |
7bf98369 | 241 | union bpf_attr attr; |
d10ef2b8 | 242 | char *log_buf; |
d7be143b | 243 | |
e542f2c4 AN |
244 | bump_rlimit_memlock(); |
245 | ||
d10ef2b8 | 246 | if (!OPTS_VALID(opts, bpf_prog_load_opts)) |
f12b6543 | 247 | return libbpf_err(-EINVAL); |
a4021a35 | 248 | |
d10ef2b8 AN |
249 | attempts = OPTS_GET(opts, attempts, 0); |
250 | if (attempts < 0) | |
f12b6543 | 251 | return libbpf_err(-EINVAL); |
d10ef2b8 AN |
252 | if (attempts == 0) |
253 | attempts = PROG_LOAD_ATTEMPTS; | |
d7be143b | 254 | |
813847a3 | 255 | memset(&attr, 0, attr_sz); |
6aef10a4 | 256 | |
d10ef2b8 AN |
257 | attr.prog_type = prog_type; |
258 | attr.expected_attach_type = OPTS_GET(opts, expected_attach_type, 0); | |
6aef10a4 | 259 | |
d10ef2b8 AN |
260 | attr.prog_btf_fd = OPTS_GET(opts, prog_btf_fd, 0); |
261 | attr.prog_flags = OPTS_GET(opts, prog_flags, 0); | |
262 | attr.prog_ifindex = OPTS_GET(opts, prog_ifindex, 0); | |
263 | attr.kern_version = OPTS_GET(opts, kern_version, 0); | |
6aef10a4 | 264 | |
d17aff80 | 265 | if (prog_name && kernel_supports(NULL, FEAT_PROG_NAME)) |
9fc205b4 | 266 | libbpf_strlcpy(attr.prog_name, prog_name, sizeof(attr.prog_name)); |
d10ef2b8 | 267 | attr.license = ptr_to_u64(license); |
a4021a35 | 268 | |
d10ef2b8 AN |
269 | if (insn_cnt > UINT_MAX) |
270 | return libbpf_err(-E2BIG); | |
271 | ||
272 | attr.insns = ptr_to_u64(insns); | |
273 | attr.insn_cnt = (__u32)insn_cnt; | |
274 | ||
275 | attach_prog_fd = OPTS_GET(opts, attach_prog_fd, 0); | |
276 | attach_btf_obj_fd = OPTS_GET(opts, attach_btf_obj_fd, 0); | |
277 | ||
278 | if (attach_prog_fd && attach_btf_obj_fd) | |
279 | return libbpf_err(-EINVAL); | |
280 | ||
281 | attr.attach_btf_id = OPTS_GET(opts, attach_btf_id, 0); | |
282 | if (attach_prog_fd) | |
283 | attr.attach_prog_fd = attach_prog_fd; | |
284 | else | |
285 | attr.attach_btf_obj_fd = attach_btf_obj_fd; | |
a4021a35 | 286 | |
d10ef2b8 AN |
287 | log_buf = OPTS_GET(opts, log_buf, NULL); |
288 | log_size = OPTS_GET(opts, log_size, 0); | |
289 | log_level = OPTS_GET(opts, log_level, 0); | |
6aef10a4 | 290 | |
d10ef2b8 AN |
291 | if (!!log_buf != !!log_size) |
292 | return libbpf_err(-EINVAL); | |
6aef10a4 | 293 | |
d10ef2b8 AN |
294 | func_info_rec_size = OPTS_GET(opts, func_info_rec_size, 0); |
295 | func_info = OPTS_GET(opts, func_info, NULL); | |
296 | attr.func_info_rec_size = func_info_rec_size; | |
297 | attr.func_info = ptr_to_u64(func_info); | |
298 | attr.func_info_cnt = OPTS_GET(opts, func_info_cnt, 0); | |
7bf98369 | 299 | |
d10ef2b8 AN |
300 | line_info_rec_size = OPTS_GET(opts, line_info_rec_size, 0); |
301 | line_info = OPTS_GET(opts, line_info, NULL); | |
302 | attr.line_info_rec_size = line_info_rec_size; | |
303 | attr.line_info = ptr_to_u64(line_info); | |
304 | attr.line_info_cnt = OPTS_GET(opts, line_info_cnt, 0); | |
6aef10a4 | 305 | |
d10ef2b8 | 306 | attr.fd_array = ptr_to_u64(OPTS_GET(opts, fd_array, NULL)); |
7bf98369 | 307 | |
4cf23a3c AN |
308 | if (log_level) { |
309 | attr.log_buf = ptr_to_u64(log_buf); | |
310 | attr.log_size = log_size; | |
311 | attr.log_level = log_level; | |
312 | } | |
313 | ||
813847a3 | 314 | fd = sys_bpf_prog_load(&attr, attr_sz, attempts); |
94e55c0f | 315 | OPTS_SET(opts, log_true_size, attr.log_true_size); |
f0187f0b | 316 | if (fd >= 0) |
7bf98369 WN |
317 | return fd; |
318 | ||
2993e051 YS |
319 | /* After bpf_prog_load, the kernel may modify certain attributes |
320 | * to give user space a hint how to deal with loading failure. | |
321 | * Check to see whether we can make some changes and load again. | |
322 | */ | |
3d650141 MKL |
323 | while (errno == E2BIG && (!finfo || !linfo)) { |
324 | if (!finfo && attr.func_info_cnt && | |
d10ef2b8 | 325 | attr.func_info_rec_size < func_info_rec_size) { |
3d650141 | 326 | /* try with corrected func info records */ |
d10ef2b8 AN |
327 | finfo = alloc_zero_tailing_info(func_info, |
328 | attr.func_info_cnt, | |
329 | func_info_rec_size, | |
3d650141 | 330 | attr.func_info_rec_size); |
f12b6543 AN |
331 | if (!finfo) { |
332 | errno = E2BIG; | |
3d650141 | 333 | goto done; |
f12b6543 | 334 | } |
3d650141 MKL |
335 | |
336 | attr.func_info = ptr_to_u64(finfo); | |
d10ef2b8 | 337 | attr.func_info_rec_size = func_info_rec_size; |
3d650141 | 338 | } else if (!linfo && attr.line_info_cnt && |
d10ef2b8 AN |
339 | attr.line_info_rec_size < line_info_rec_size) { |
340 | linfo = alloc_zero_tailing_info(line_info, | |
341 | attr.line_info_cnt, | |
342 | line_info_rec_size, | |
3d650141 | 343 | attr.line_info_rec_size); |
f12b6543 AN |
344 | if (!linfo) { |
345 | errno = E2BIG; | |
3d650141 | 346 | goto done; |
f12b6543 | 347 | } |
3d650141 MKL |
348 | |
349 | attr.line_info = ptr_to_u64(linfo); | |
d10ef2b8 | 350 | attr.line_info_rec_size = line_info_rec_size; |
3d650141 MKL |
351 | } else { |
352 | break; | |
2993e051 YS |
353 | } |
354 | ||
813847a3 | 355 | fd = sys_bpf_prog_load(&attr, attr_sz, attempts); |
94e55c0f | 356 | OPTS_SET(opts, log_true_size, attr.log_true_size); |
f0187f0b | 357 | if (fd >= 0) |
2993e051 YS |
358 | goto done; |
359 | } | |
360 | ||
4cf23a3c AN |
361 | if (log_level == 0 && log_buf) { |
362 | /* log_level == 0 with non-NULL log_buf requires retrying on error | |
363 | * with log_level == 1 and log_buf/log_buf_size set, to get details of | |
364 | * failure | |
365 | */ | |
366 | attr.log_buf = ptr_to_u64(log_buf); | |
367 | attr.log_size = log_size; | |
368 | attr.log_level = 1; | |
6aef10a4 | 369 | |
813847a3 | 370 | fd = sys_bpf_prog_load(&attr, attr_sz, attempts); |
94e55c0f | 371 | OPTS_SET(opts, log_true_size, attr.log_true_size); |
4cf23a3c | 372 | } |
2993e051 | 373 | done: |
f12b6543 | 374 | /* free() doesn't affect errno, so we don't need to restore it */ |
2993e051 | 375 | free(finfo); |
3d650141 | 376 | free(linfo); |
f12b6543 | 377 | return libbpf_err_errno(fd); |
7bf98369 | 378 | } |
43798bf3 | 379 | |
10ecc728 | 380 | int bpf_map_update_elem(int fd, const void *key, const void *value, |
83d994d0 | 381 | __u64 flags) |
43798bf3 | 382 | { |
813847a3 | 383 | const size_t attr_sz = offsetofend(union bpf_attr, flags); |
43798bf3 | 384 | union bpf_attr attr; |
f12b6543 | 385 | int ret; |
43798bf3 | 386 | |
813847a3 | 387 | memset(&attr, 0, attr_sz); |
43798bf3 HK |
388 | attr.map_fd = fd; |
389 | attr.key = ptr_to_u64(key); | |
390 | attr.value = ptr_to_u64(value); | |
391 | attr.flags = flags; | |
392 | ||
813847a3 | 393 | ret = sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, attr_sz); |
f12b6543 | 394 | return libbpf_err_errno(ret); |
43798bf3 | 395 | } |
9742da01 | 396 | |
e5ff7c40 | 397 | int bpf_map_lookup_elem(int fd, const void *key, void *value) |
9742da01 | 398 | { |
813847a3 | 399 | const size_t attr_sz = offsetofend(union bpf_attr, flags); |
9742da01 | 400 | union bpf_attr attr; |
f12b6543 | 401 | int ret; |
9742da01 | 402 | |
813847a3 | 403 | memset(&attr, 0, attr_sz); |
9742da01 WN |
404 | attr.map_fd = fd; |
405 | attr.key = ptr_to_u64(key); | |
406 | attr.value = ptr_to_u64(value); | |
407 | ||
813847a3 | 408 | ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, attr_sz); |
f12b6543 | 409 | return libbpf_err_errno(ret); |
9742da01 WN |
410 | } |
411 | ||
df5d22fa AS |
412 | int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags) |
413 | { | |
813847a3 | 414 | const size_t attr_sz = offsetofend(union bpf_attr, flags); |
df5d22fa | 415 | union bpf_attr attr; |
f12b6543 | 416 | int ret; |
df5d22fa | 417 | |
813847a3 | 418 | memset(&attr, 0, attr_sz); |
df5d22fa AS |
419 | attr.map_fd = fd; |
420 | attr.key = ptr_to_u64(key); | |
421 | attr.value = ptr_to_u64(value); | |
422 | attr.flags = flags; | |
423 | ||
813847a3 | 424 | ret = sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, attr_sz); |
f12b6543 | 425 | return libbpf_err_errno(ret); |
df5d22fa AS |
426 | } |
427 | ||
43b987d2 MV |
428 | int bpf_map_lookup_and_delete_elem(int fd, const void *key, void *value) |
429 | { | |
813847a3 | 430 | const size_t attr_sz = offsetofend(union bpf_attr, flags); |
43b987d2 | 431 | union bpf_attr attr; |
f12b6543 | 432 | int ret; |
43b987d2 | 433 | |
813847a3 | 434 | memset(&attr, 0, attr_sz); |
43b987d2 MV |
435 | attr.map_fd = fd; |
436 | attr.key = ptr_to_u64(key); | |
437 | attr.value = ptr_to_u64(value); | |
438 | ||
813847a3 | 439 | ret = sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, attr_sz); |
f12b6543 | 440 | return libbpf_err_errno(ret); |
43b987d2 MV |
441 | } |
442 | ||
d59b9f2d DS |
443 | int bpf_map_lookup_and_delete_elem_flags(int fd, const void *key, void *value, __u64 flags) |
444 | { | |
813847a3 | 445 | const size_t attr_sz = offsetofend(union bpf_attr, flags); |
d59b9f2d | 446 | union bpf_attr attr; |
64165ddf | 447 | int ret; |
d59b9f2d | 448 | |
813847a3 | 449 | memset(&attr, 0, attr_sz); |
d59b9f2d DS |
450 | attr.map_fd = fd; |
451 | attr.key = ptr_to_u64(key); | |
452 | attr.value = ptr_to_u64(value); | |
453 | attr.flags = flags; | |
454 | ||
813847a3 | 455 | ret = sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, attr_sz); |
64165ddf | 456 | return libbpf_err_errno(ret); |
d59b9f2d DS |
457 | } |
458 | ||
e58383b8 | 459 | int bpf_map_delete_elem(int fd, const void *key) |
9742da01 | 460 | { |
813847a3 | 461 | const size_t attr_sz = offsetofend(union bpf_attr, flags); |
9742da01 | 462 | union bpf_attr attr; |
f12b6543 | 463 | int ret; |
9742da01 | 464 | |
813847a3 | 465 | memset(&attr, 0, attr_sz); |
9742da01 WN |
466 | attr.map_fd = fd; |
467 | attr.key = ptr_to_u64(key); | |
468 | ||
813847a3 | 469 | ret = sys_bpf(BPF_MAP_DELETE_ELEM, &attr, attr_sz); |
f12b6543 | 470 | return libbpf_err_errno(ret); |
9742da01 WN |
471 | } |
472 | ||
737d0646 AN |
473 | int bpf_map_delete_elem_flags(int fd, const void *key, __u64 flags) |
474 | { | |
813847a3 | 475 | const size_t attr_sz = offsetofend(union bpf_attr, flags); |
737d0646 AN |
476 | union bpf_attr attr; |
477 | int ret; | |
478 | ||
813847a3 | 479 | memset(&attr, 0, attr_sz); |
737d0646 AN |
480 | attr.map_fd = fd; |
481 | attr.key = ptr_to_u64(key); | |
482 | attr.flags = flags; | |
483 | ||
813847a3 | 484 | ret = sys_bpf(BPF_MAP_DELETE_ELEM, &attr, attr_sz); |
737d0646 AN |
485 | return libbpf_err_errno(ret); |
486 | } | |
487 | ||
5f155c25 | 488 | int bpf_map_get_next_key(int fd, const void *key, void *next_key) |
9742da01 | 489 | { |
813847a3 | 490 | const size_t attr_sz = offsetofend(union bpf_attr, next_key); |
9742da01 | 491 | union bpf_attr attr; |
f12b6543 | 492 | int ret; |
9742da01 | 493 | |
813847a3 | 494 | memset(&attr, 0, attr_sz); |
9742da01 WN |
495 | attr.map_fd = fd; |
496 | attr.key = ptr_to_u64(key); | |
497 | attr.next_key = ptr_to_u64(next_key); | |
498 | ||
813847a3 | 499 | ret = sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, attr_sz); |
f12b6543 | 500 | return libbpf_err_errno(ret); |
9742da01 WN |
501 | } |
502 | ||
d859900c DB |
503 | int bpf_map_freeze(int fd) |
504 | { | |
813847a3 | 505 | const size_t attr_sz = offsetofend(union bpf_attr, map_fd); |
d859900c | 506 | union bpf_attr attr; |
f12b6543 | 507 | int ret; |
d859900c | 508 | |
813847a3 | 509 | memset(&attr, 0, attr_sz); |
d859900c DB |
510 | attr.map_fd = fd; |
511 | ||
813847a3 | 512 | ret = sys_bpf(BPF_MAP_FREEZE, &attr, attr_sz); |
f12b6543 | 513 | return libbpf_err_errno(ret); |
d859900c DB |
514 | } |
515 | ||
2ab3d86e YS |
516 | static int bpf_map_batch_common(int cmd, int fd, void *in_batch, |
517 | void *out_batch, void *keys, void *values, | |
518 | __u32 *count, | |
519 | const struct bpf_map_batch_opts *opts) | |
520 | { | |
813847a3 | 521 | const size_t attr_sz = offsetofend(union bpf_attr, batch); |
858e284f | 522 | union bpf_attr attr; |
2ab3d86e YS |
523 | int ret; |
524 | ||
525 | if (!OPTS_VALID(opts, bpf_map_batch_opts)) | |
f12b6543 | 526 | return libbpf_err(-EINVAL); |
2ab3d86e | 527 | |
813847a3 | 528 | memset(&attr, 0, attr_sz); |
2ab3d86e YS |
529 | attr.batch.map_fd = fd; |
530 | attr.batch.in_batch = ptr_to_u64(in_batch); | |
531 | attr.batch.out_batch = ptr_to_u64(out_batch); | |
532 | attr.batch.keys = ptr_to_u64(keys); | |
533 | attr.batch.values = ptr_to_u64(values); | |
534 | attr.batch.count = *count; | |
535 | attr.batch.elem_flags = OPTS_GET(opts, elem_flags, 0); | |
536 | attr.batch.flags = OPTS_GET(opts, flags, 0); | |
537 | ||
813847a3 | 538 | ret = sys_bpf(cmd, &attr, attr_sz); |
2ab3d86e YS |
539 | *count = attr.batch.count; |
540 | ||
f12b6543 | 541 | return libbpf_err_errno(ret); |
2ab3d86e YS |
542 | } |
543 | ||
e59618f0 | 544 | int bpf_map_delete_batch(int fd, const void *keys, __u32 *count, |
2ab3d86e YS |
545 | const struct bpf_map_batch_opts *opts) |
546 | { | |
547 | return bpf_map_batch_common(BPF_MAP_DELETE_BATCH, fd, NULL, | |
e59618f0 | 548 | NULL, (void *)keys, NULL, count, opts); |
2ab3d86e YS |
549 | } |
550 | ||
551 | int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch, void *keys, | |
552 | void *values, __u32 *count, | |
553 | const struct bpf_map_batch_opts *opts) | |
554 | { | |
555 | return bpf_map_batch_common(BPF_MAP_LOOKUP_BATCH, fd, in_batch, | |
556 | out_batch, keys, values, count, opts); | |
557 | } | |
558 | ||
559 | int bpf_map_lookup_and_delete_batch(int fd, void *in_batch, void *out_batch, | |
560 | void *keys, void *values, __u32 *count, | |
561 | const struct bpf_map_batch_opts *opts) | |
562 | { | |
563 | return bpf_map_batch_common(BPF_MAP_LOOKUP_AND_DELETE_BATCH, | |
564 | fd, in_batch, out_batch, keys, values, | |
565 | count, opts); | |
566 | } | |
567 | ||
e59618f0 | 568 | int bpf_map_update_batch(int fd, const void *keys, const void *values, __u32 *count, |
2ab3d86e YS |
569 | const struct bpf_map_batch_opts *opts) |
570 | { | |
571 | return bpf_map_batch_common(BPF_MAP_UPDATE_BATCH, fd, NULL, NULL, | |
e59618f0 | 572 | (void *)keys, (void *)values, count, opts); |
2ab3d86e YS |
573 | } |
574 | ||
f1674dc7 | 575 | int bpf_obj_pin_opts(int fd, const char *pathname, const struct bpf_obj_pin_opts *opts) |
9742da01 | 576 | { |
f1674dc7 | 577 | const size_t attr_sz = offsetofend(union bpf_attr, path_fd); |
9742da01 | 578 | union bpf_attr attr; |
f12b6543 | 579 | int ret; |
9742da01 | 580 | |
f1674dc7 AN |
581 | if (!OPTS_VALID(opts, bpf_obj_pin_opts)) |
582 | return libbpf_err(-EINVAL); | |
583 | ||
813847a3 | 584 | memset(&attr, 0, attr_sz); |
f1674dc7 | 585 | attr.path_fd = OPTS_GET(opts, path_fd, 0); |
9742da01 | 586 | attr.pathname = ptr_to_u64((void *)pathname); |
f1674dc7 | 587 | attr.file_flags = OPTS_GET(opts, file_flags, 0); |
9742da01 WN |
588 | attr.bpf_fd = fd; |
589 | ||
813847a3 | 590 | ret = sys_bpf(BPF_OBJ_PIN, &attr, attr_sz); |
f12b6543 | 591 | return libbpf_err_errno(ret); |
9742da01 WN |
592 | } |
593 | ||
f1674dc7 AN |
594 | int bpf_obj_pin(int fd, const char *pathname) |
595 | { | |
596 | return bpf_obj_pin_opts(fd, pathname, NULL); | |
597 | } | |
598 | ||
9742da01 | 599 | int bpf_obj_get(const char *pathname) |
395fc4fa JB |
600 | { |
601 | return bpf_obj_get_opts(pathname, NULL); | |
602 | } | |
603 | ||
604 | int bpf_obj_get_opts(const char *pathname, const struct bpf_obj_get_opts *opts) | |
9742da01 | 605 | { |
f1674dc7 | 606 | const size_t attr_sz = offsetofend(union bpf_attr, path_fd); |
9742da01 | 607 | union bpf_attr attr; |
f12b6543 | 608 | int fd; |
9742da01 | 609 | |
395fc4fa JB |
610 | if (!OPTS_VALID(opts, bpf_obj_get_opts)) |
611 | return libbpf_err(-EINVAL); | |
612 | ||
813847a3 | 613 | memset(&attr, 0, attr_sz); |
f1674dc7 | 614 | attr.path_fd = OPTS_GET(opts, path_fd, 0); |
9742da01 | 615 | attr.pathname = ptr_to_u64((void *)pathname); |
395fc4fa | 616 | attr.file_flags = OPTS_GET(opts, file_flags, 0); |
9742da01 | 617 | |
813847a3 | 618 | fd = sys_bpf_fd(BPF_OBJ_GET, &attr, attr_sz); |
f12b6543 | 619 | return libbpf_err_errno(fd); |
9742da01 | 620 | } |
5dc880de | 621 | |
464bc0fd JF |
622 | int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type, |
623 | unsigned int flags) | |
cdbee383 AI |
624 | { |
625 | DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opts, | |
626 | .flags = flags, | |
627 | ); | |
628 | ||
d6c9c24e | 629 | return bpf_prog_attach_opts(prog_fd, target_fd, type, &opts); |
cdbee383 AI |
630 | } |
631 | ||
fe20ce3a DB |
632 | int bpf_prog_attach_opts(int prog_fd, int target, enum bpf_attach_type type, |
633 | const struct bpf_prog_attach_opts *opts) | |
5dc880de | 634 | { |
fe20ce3a DB |
635 | const size_t attr_sz = offsetofend(union bpf_attr, expected_revision); |
636 | __u32 relative_id, flags; | |
637 | int ret, relative_fd; | |
5dc880de JS |
638 | union bpf_attr attr; |
639 | ||
cdbee383 | 640 | if (!OPTS_VALID(opts, bpf_prog_attach_opts)) |
f12b6543 | 641 | return libbpf_err(-EINVAL); |
cdbee383 | 642 | |
fe20ce3a DB |
643 | relative_id = OPTS_GET(opts, relative_id, 0); |
644 | relative_fd = OPTS_GET(opts, relative_fd, 0); | |
645 | flags = OPTS_GET(opts, flags, 0); | |
646 | ||
647 | /* validate we don't have unexpected combinations of non-zero fields */ | |
648 | if (relative_fd && relative_id) | |
649 | return libbpf_err(-EINVAL); | |
650 | ||
813847a3 | 651 | memset(&attr, 0, attr_sz); |
fe20ce3a DB |
652 | attr.target_fd = target; |
653 | attr.attach_bpf_fd = prog_fd; | |
654 | attr.attach_type = type; | |
655 | attr.replace_bpf_fd = OPTS_GET(opts, replace_fd, 0); | |
656 | attr.expected_revision = OPTS_GET(opts, expected_revision, 0); | |
657 | ||
658 | if (relative_id) { | |
659 | attr.attach_flags = flags | BPF_F_ID; | |
660 | attr.relative_id = relative_id; | |
661 | } else { | |
662 | attr.attach_flags = flags; | |
663 | attr.relative_fd = relative_fd; | |
664 | } | |
5dc880de | 665 | |
813847a3 | 666 | ret = sys_bpf(BPF_PROG_ATTACH, &attr, attr_sz); |
f12b6543 | 667 | return libbpf_err_errno(ret); |
5dc880de JS |
668 | } |
669 | ||
fe20ce3a DB |
670 | int bpf_prog_detach_opts(int prog_fd, int target, enum bpf_attach_type type, |
671 | const struct bpf_prog_detach_opts *opts) | |
5dc880de | 672 | { |
fe20ce3a DB |
673 | const size_t attr_sz = offsetofend(union bpf_attr, expected_revision); |
674 | __u32 relative_id, flags; | |
675 | int ret, relative_fd; | |
5dc880de | 676 | union bpf_attr attr; |
fe20ce3a DB |
677 | |
678 | if (!OPTS_VALID(opts, bpf_prog_detach_opts)) | |
679 | return libbpf_err(-EINVAL); | |
680 | ||
681 | relative_id = OPTS_GET(opts, relative_id, 0); | |
682 | relative_fd = OPTS_GET(opts, relative_fd, 0); | |
683 | flags = OPTS_GET(opts, flags, 0); | |
684 | ||
685 | /* validate we don't have unexpected combinations of non-zero fields */ | |
686 | if (relative_fd && relative_id) | |
687 | return libbpf_err(-EINVAL); | |
5dc880de | 688 | |
813847a3 | 689 | memset(&attr, 0, attr_sz); |
fe20ce3a DB |
690 | attr.target_fd = target; |
691 | attr.attach_bpf_fd = prog_fd; | |
692 | attr.attach_type = type; | |
693 | attr.expected_revision = OPTS_GET(opts, expected_revision, 0); | |
694 | ||
695 | if (relative_id) { | |
696 | attr.attach_flags = flags | BPF_F_ID; | |
697 | attr.relative_id = relative_id; | |
698 | } else { | |
699 | attr.attach_flags = flags; | |
700 | attr.relative_fd = relative_fd; | |
701 | } | |
5dc880de | 702 | |
813847a3 | 703 | ret = sys_bpf(BPF_PROG_DETACH, &attr, attr_sz); |
f12b6543 | 704 | return libbpf_err_errno(ret); |
5dc880de | 705 | } |
30848873 | 706 | |
fe20ce3a | 707 | int bpf_prog_detach(int target_fd, enum bpf_attach_type type) |
244d20ef | 708 | { |
fe20ce3a DB |
709 | return bpf_prog_detach_opts(0, target_fd, type, NULL); |
710 | } | |
244d20ef | 711 | |
fe20ce3a DB |
712 | int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type) |
713 | { | |
714 | return bpf_prog_detach_opts(prog_fd, target_fd, type, NULL); | |
244d20ef AS |
715 | } |
716 | ||
cc4f864b AN |
717 | int bpf_link_create(int prog_fd, int target_fd, |
718 | enum bpf_attach_type attach_type, | |
719 | const struct bpf_link_create_opts *opts) | |
720 | { | |
813847a3 | 721 | const size_t attr_sz = offsetofend(union bpf_attr, link_create); |
55cc3768 DB |
722 | __u32 target_btf_id, iter_info_len, relative_id; |
723 | int fd, err, relative_fd; | |
cc4f864b AN |
724 | union bpf_attr attr; |
725 | ||
726 | if (!OPTS_VALID(opts, bpf_link_create_opts)) | |
f12b6543 | 727 | return libbpf_err(-EINVAL); |
cc4f864b | 728 | |
a5359091 THJ |
729 | iter_info_len = OPTS_GET(opts, iter_info_len, 0); |
730 | target_btf_id = OPTS_GET(opts, target_btf_id, 0); | |
731 | ||
3ec84f4b AN |
732 | /* validate we don't have unexpected combinations of non-zero fields */ |
733 | if (iter_info_len || target_btf_id) { | |
734 | if (iter_info_len && target_btf_id) | |
735 | return libbpf_err(-EINVAL); | |
736 | if (!OPTS_ZEROED(opts, target_btf_id)) | |
737 | return libbpf_err(-EINVAL); | |
738 | } | |
a5359091 | 739 | |
813847a3 | 740 | memset(&attr, 0, attr_sz); |
cc4f864b AN |
741 | attr.link_create.prog_fd = prog_fd; |
742 | attr.link_create.target_fd = target_fd; | |
743 | attr.link_create.attach_type = attach_type; | |
cd31039a | 744 | attr.link_create.flags = OPTS_GET(opts, flags, 0); |
a5359091 | 745 | |
3ec84f4b | 746 | if (target_btf_id) { |
a5359091 | 747 | attr.link_create.target_btf_id = target_btf_id; |
3ec84f4b | 748 | goto proceed; |
a5359091 | 749 | } |
cc4f864b | 750 | |
3ec84f4b AN |
751 | switch (attach_type) { |
752 | case BPF_TRACE_ITER: | |
753 | attr.link_create.iter_info = ptr_to_u64(OPTS_GET(opts, iter_info, (void *)0)); | |
754 | attr.link_create.iter_info_len = iter_info_len; | |
755 | break; | |
756 | case BPF_PERF_EVENT: | |
757 | attr.link_create.perf_event.bpf_cookie = OPTS_GET(opts, perf_event.bpf_cookie, 0); | |
758 | if (!OPTS_ZEROED(opts, perf_event)) | |
759 | return libbpf_err(-EINVAL); | |
5117c26e JO |
760 | break; |
761 | case BPF_TRACE_KPROBE_MULTI: | |
762 | attr.link_create.kprobe_multi.flags = OPTS_GET(opts, kprobe_multi.flags, 0); | |
763 | attr.link_create.kprobe_multi.cnt = OPTS_GET(opts, kprobe_multi.cnt, 0); | |
764 | attr.link_create.kprobe_multi.syms = ptr_to_u64(OPTS_GET(opts, kprobe_multi.syms, 0)); | |
765 | attr.link_create.kprobe_multi.addrs = ptr_to_u64(OPTS_GET(opts, kprobe_multi.addrs, 0)); | |
766 | attr.link_create.kprobe_multi.cookies = ptr_to_u64(OPTS_GET(opts, kprobe_multi.cookies, 0)); | |
767 | if (!OPTS_ZEROED(opts, kprobe_multi)) | |
768 | return libbpf_err(-EINVAL); | |
3ec84f4b | 769 | break; |
5054a303 JO |
770 | case BPF_TRACE_UPROBE_MULTI: |
771 | attr.link_create.uprobe_multi.flags = OPTS_GET(opts, uprobe_multi.flags, 0); | |
772 | attr.link_create.uprobe_multi.cnt = OPTS_GET(opts, uprobe_multi.cnt, 0); | |
773 | attr.link_create.uprobe_multi.path = ptr_to_u64(OPTS_GET(opts, uprobe_multi.path, 0)); | |
774 | attr.link_create.uprobe_multi.offsets = ptr_to_u64(OPTS_GET(opts, uprobe_multi.offsets, 0)); | |
775 | attr.link_create.uprobe_multi.ref_ctr_offsets = ptr_to_u64(OPTS_GET(opts, uprobe_multi.ref_ctr_offsets, 0)); | |
776 | attr.link_create.uprobe_multi.cookies = ptr_to_u64(OPTS_GET(opts, uprobe_multi.cookies, 0)); | |
777 | attr.link_create.uprobe_multi.pid = OPTS_GET(opts, uprobe_multi.pid, 0); | |
778 | if (!OPTS_ZEROED(opts, uprobe_multi)) | |
779 | return libbpf_err(-EINVAL); | |
780 | break; | |
129b9c5e KFL |
781 | case BPF_TRACE_FENTRY: |
782 | case BPF_TRACE_FEXIT: | |
783 | case BPF_MODIFY_RETURN: | |
784 | case BPF_LSM_MAC: | |
785 | attr.link_create.tracing.cookie = OPTS_GET(opts, tracing.cookie, 0); | |
786 | if (!OPTS_ZEROED(opts, tracing)) | |
787 | return libbpf_err(-EINVAL); | |
788 | break; | |
52364abb FW |
789 | case BPF_NETFILTER: |
790 | attr.link_create.netfilter.pf = OPTS_GET(opts, netfilter.pf, 0); | |
791 | attr.link_create.netfilter.hooknum = OPTS_GET(opts, netfilter.hooknum, 0); | |
792 | attr.link_create.netfilter.priority = OPTS_GET(opts, netfilter.priority, 0); | |
793 | attr.link_create.netfilter.flags = OPTS_GET(opts, netfilter.flags, 0); | |
794 | if (!OPTS_ZEROED(opts, netfilter)) | |
795 | return libbpf_err(-EINVAL); | |
796 | break; | |
55cc3768 DB |
797 | case BPF_TCX_INGRESS: |
798 | case BPF_TCX_EGRESS: | |
799 | relative_fd = OPTS_GET(opts, tcx.relative_fd, 0); | |
800 | relative_id = OPTS_GET(opts, tcx.relative_id, 0); | |
801 | if (relative_fd && relative_id) | |
802 | return libbpf_err(-EINVAL); | |
803 | if (relative_id) { | |
804 | attr.link_create.tcx.relative_id = relative_id; | |
805 | attr.link_create.flags |= BPF_F_ID; | |
806 | } else { | |
807 | attr.link_create.tcx.relative_fd = relative_fd; | |
808 | } | |
809 | attr.link_create.tcx.expected_revision = OPTS_GET(opts, tcx.expected_revision, 0); | |
810 | if (!OPTS_ZEROED(opts, tcx)) | |
811 | return libbpf_err(-EINVAL); | |
812 | break; | |
05c31b4a DB |
813 | case BPF_NETKIT_PRIMARY: |
814 | case BPF_NETKIT_PEER: | |
815 | relative_fd = OPTS_GET(opts, netkit.relative_fd, 0); | |
816 | relative_id = OPTS_GET(opts, netkit.relative_id, 0); | |
817 | if (relative_fd && relative_id) | |
818 | return libbpf_err(-EINVAL); | |
819 | if (relative_id) { | |
820 | attr.link_create.netkit.relative_id = relative_id; | |
821 | attr.link_create.flags |= BPF_F_ID; | |
822 | } else { | |
823 | attr.link_create.netkit.relative_fd = relative_fd; | |
824 | } | |
825 | attr.link_create.netkit.expected_revision = OPTS_GET(opts, netkit.expected_revision, 0); | |
826 | if (!OPTS_ZEROED(opts, netkit)) | |
827 | return libbpf_err(-EINVAL); | |
828 | break; | |
3ec84f4b AN |
829 | default: |
830 | if (!OPTS_ZEROED(opts, flags)) | |
831 | return libbpf_err(-EINVAL); | |
832 | break; | |
833 | } | |
834 | proceed: | |
813847a3 | 835 | fd = sys_bpf_fd(BPF_LINK_CREATE, &attr, attr_sz); |
8462e0b4 AN |
836 | if (fd >= 0) |
837 | return fd; | |
838 | /* we'll get EINVAL if LINK_CREATE doesn't support attaching fentry | |
839 | * and other similar programs | |
840 | */ | |
841 | err = -errno; | |
842 | if (err != -EINVAL) | |
843 | return libbpf_err(err); | |
844 | ||
845 | /* if user used features not supported by | |
846 | * BPF_RAW_TRACEPOINT_OPEN command, then just give up immediately | |
847 | */ | |
848 | if (attr.link_create.target_fd || attr.link_create.target_btf_id) | |
849 | return libbpf_err(err); | |
850 | if (!OPTS_ZEROED(opts, sz)) | |
851 | return libbpf_err(err); | |
852 | ||
853 | /* otherwise, for few select kinds of programs that can be | |
854 | * attached using BPF_RAW_TRACEPOINT_OPEN command, try that as | |
855 | * a fallback for older kernels | |
856 | */ | |
857 | switch (attach_type) { | |
858 | case BPF_TRACE_RAW_TP: | |
859 | case BPF_LSM_MAC: | |
860 | case BPF_TRACE_FENTRY: | |
861 | case BPF_TRACE_FEXIT: | |
862 | case BPF_MODIFY_RETURN: | |
863 | return bpf_raw_tracepoint_open(NULL, prog_fd); | |
864 | default: | |
865 | return libbpf_err(err); | |
866 | } | |
cc4f864b AN |
867 | } |
868 | ||
2e49527e AN |
869 | int bpf_link_detach(int link_fd) |
870 | { | |
813847a3 | 871 | const size_t attr_sz = offsetofend(union bpf_attr, link_detach); |
2e49527e | 872 | union bpf_attr attr; |
f12b6543 | 873 | int ret; |
2e49527e | 874 | |
813847a3 | 875 | memset(&attr, 0, attr_sz); |
2e49527e AN |
876 | attr.link_detach.link_fd = link_fd; |
877 | ||
813847a3 | 878 | ret = sys_bpf(BPF_LINK_DETACH, &attr, attr_sz); |
f12b6543 | 879 | return libbpf_err_errno(ret); |
2e49527e AN |
880 | } |
881 | ||
cc4f864b AN |
882 | int bpf_link_update(int link_fd, int new_prog_fd, |
883 | const struct bpf_link_update_opts *opts) | |
884 | { | |
813847a3 | 885 | const size_t attr_sz = offsetofend(union bpf_attr, link_update); |
cc4f864b | 886 | union bpf_attr attr; |
f12b6543 | 887 | int ret; |
cc4f864b AN |
888 | |
889 | if (!OPTS_VALID(opts, bpf_link_update_opts)) | |
f12b6543 | 890 | return libbpf_err(-EINVAL); |
cc4f864b | 891 | |
912dd4b0 KFL |
892 | if (OPTS_GET(opts, old_prog_fd, 0) && OPTS_GET(opts, old_map_fd, 0)) |
893 | return libbpf_err(-EINVAL); | |
894 | ||
813847a3 | 895 | memset(&attr, 0, attr_sz); |
cc4f864b AN |
896 | attr.link_update.link_fd = link_fd; |
897 | attr.link_update.new_prog_fd = new_prog_fd; | |
898 | attr.link_update.flags = OPTS_GET(opts, flags, 0); | |
912dd4b0 KFL |
899 | if (OPTS_GET(opts, old_prog_fd, 0)) |
900 | attr.link_update.old_prog_fd = OPTS_GET(opts, old_prog_fd, 0); | |
901 | else if (OPTS_GET(opts, old_map_fd, 0)) | |
902 | attr.link_update.old_map_fd = OPTS_GET(opts, old_map_fd, 0); | |
cc4f864b | 903 | |
813847a3 | 904 | ret = sys_bpf(BPF_LINK_UPDATE, &attr, attr_sz); |
f12b6543 | 905 | return libbpf_err_errno(ret); |
cc4f864b AN |
906 | } |
907 | ||
c09add2f YS |
908 | int bpf_iter_create(int link_fd) |
909 | { | |
813847a3 | 910 | const size_t attr_sz = offsetofend(union bpf_attr, iter_create); |
c09add2f | 911 | union bpf_attr attr; |
f12b6543 | 912 | int fd; |
c09add2f | 913 | |
813847a3 | 914 | memset(&attr, 0, attr_sz); |
c09add2f YS |
915 | attr.iter_create.link_fd = link_fd; |
916 | ||
813847a3 | 917 | fd = sys_bpf_fd(BPF_ITER_CREATE, &attr, attr_sz); |
f12b6543 | 918 | return libbpf_err_errno(fd); |
c09add2f YS |
919 | } |
920 | ||
fe20ce3a | 921 | int bpf_prog_query_opts(int target, enum bpf_attach_type type, |
a4b2f3cf | 922 | struct bpf_prog_query_opts *opts) |
5d0cbf9b | 923 | { |
813847a3 | 924 | const size_t attr_sz = offsetofend(union bpf_attr, query); |
5d0cbf9b AS |
925 | union bpf_attr attr; |
926 | int ret; | |
927 | ||
a4b2f3cf SF |
928 | if (!OPTS_VALID(opts, bpf_prog_query_opts)) |
929 | return libbpf_err(-EINVAL); | |
930 | ||
813847a3 | 931 | memset(&attr, 0, attr_sz); |
fe20ce3a DB |
932 | attr.query.target_fd = target; |
933 | attr.query.attach_type = type; | |
934 | attr.query.query_flags = OPTS_GET(opts, query_flags, 0); | |
935 | attr.query.count = OPTS_GET(opts, count, 0); | |
936 | attr.query.prog_ids = ptr_to_u64(OPTS_GET(opts, prog_ids, NULL)); | |
937 | attr.query.link_ids = ptr_to_u64(OPTS_GET(opts, link_ids, NULL)); | |
938 | attr.query.prog_attach_flags = ptr_to_u64(OPTS_GET(opts, prog_attach_flags, NULL)); | |
939 | attr.query.link_attach_flags = ptr_to_u64(OPTS_GET(opts, link_attach_flags, NULL)); | |
5d0cbf9b | 940 | |
813847a3 | 941 | ret = sys_bpf(BPF_PROG_QUERY, &attr, attr_sz); |
f12b6543 | 942 | |
a4b2f3cf | 943 | OPTS_SET(opts, attach_flags, attr.query.attach_flags); |
fe20ce3a DB |
944 | OPTS_SET(opts, revision, attr.query.revision); |
945 | OPTS_SET(opts, count, attr.query.count); | |
a4b2f3cf SF |
946 | |
947 | return libbpf_err_errno(ret); | |
948 | } | |
949 | ||
950 | int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags, | |
951 | __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt) | |
952 | { | |
953 | LIBBPF_OPTS(bpf_prog_query_opts, opts); | |
954 | int ret; | |
955 | ||
956 | opts.query_flags = query_flags; | |
957 | opts.prog_ids = prog_ids; | |
958 | opts.prog_cnt = *prog_cnt; | |
959 | ||
960 | ret = bpf_prog_query_opts(target_fd, type, &opts); | |
961 | ||
5d0cbf9b | 962 | if (attach_flags) |
a4b2f3cf SF |
963 | *attach_flags = opts.attach_flags; |
964 | *prog_cnt = opts.prog_cnt; | |
f12b6543 AN |
965 | |
966 | return libbpf_err_errno(ret); | |
5d0cbf9b AS |
967 | } |
968 | ||
88f7fe72 SL |
969 | int bpf_prog_test_run_opts(int prog_fd, struct bpf_test_run_opts *opts) |
970 | { | |
813847a3 | 971 | const size_t attr_sz = offsetofend(union bpf_attr, test); |
88f7fe72 SL |
972 | union bpf_attr attr; |
973 | int ret; | |
974 | ||
975 | if (!OPTS_VALID(opts, bpf_test_run_opts)) | |
f12b6543 | 976 | return libbpf_err(-EINVAL); |
88f7fe72 | 977 | |
813847a3 | 978 | memset(&attr, 0, attr_sz); |
88f7fe72 | 979 | attr.test.prog_fd = prog_fd; |
24592ad1 | 980 | attr.test.batch_size = OPTS_GET(opts, batch_size, 0); |
88f7fe72 SL |
981 | attr.test.cpu = OPTS_GET(opts, cpu, 0); |
982 | attr.test.flags = OPTS_GET(opts, flags, 0); | |
983 | attr.test.repeat = OPTS_GET(opts, repeat, 0); | |
984 | attr.test.duration = OPTS_GET(opts, duration, 0); | |
985 | attr.test.ctx_size_in = OPTS_GET(opts, ctx_size_in, 0); | |
986 | attr.test.ctx_size_out = OPTS_GET(opts, ctx_size_out, 0); | |
987 | attr.test.data_size_in = OPTS_GET(opts, data_size_in, 0); | |
988 | attr.test.data_size_out = OPTS_GET(opts, data_size_out, 0); | |
989 | attr.test.ctx_in = ptr_to_u64(OPTS_GET(opts, ctx_in, NULL)); | |
990 | attr.test.ctx_out = ptr_to_u64(OPTS_GET(opts, ctx_out, NULL)); | |
991 | attr.test.data_in = ptr_to_u64(OPTS_GET(opts, data_in, NULL)); | |
992 | attr.test.data_out = ptr_to_u64(OPTS_GET(opts, data_out, NULL)); | |
993 | ||
813847a3 | 994 | ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, attr_sz); |
f12b6543 | 995 | |
88f7fe72 SL |
996 | OPTS_SET(opts, data_size_out, attr.test.data_size_out); |
997 | OPTS_SET(opts, ctx_size_out, attr.test.ctx_size_out); | |
998 | OPTS_SET(opts, duration, attr.test.duration); | |
999 | OPTS_SET(opts, retval, attr.test.retval); | |
f12b6543 AN |
1000 | |
1001 | return libbpf_err_errno(ret); | |
88f7fe72 SL |
1002 | } |
1003 | ||
a6e130c4 | 1004 | static int bpf_obj_get_next_id(__u32 start_id, __u32 *next_id, int cmd) |
95b9afd3 | 1005 | { |
813847a3 | 1006 | const size_t attr_sz = offsetofend(union bpf_attr, open_flags); |
95b9afd3 MKL |
1007 | union bpf_attr attr; |
1008 | int err; | |
1009 | ||
813847a3 | 1010 | memset(&attr, 0, attr_sz); |
95b9afd3 MKL |
1011 | attr.start_id = start_id; |
1012 | ||
813847a3 | 1013 | err = sys_bpf(cmd, &attr, attr_sz); |
95b9afd3 MKL |
1014 | if (!err) |
1015 | *next_id = attr.next_id; | |
1016 | ||
f12b6543 | 1017 | return libbpf_err_errno(err); |
95b9afd3 MKL |
1018 | } |
1019 | ||
a6e130c4 | 1020 | int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id) |
95b9afd3 | 1021 | { |
a6e130c4 QM |
1022 | return bpf_obj_get_next_id(start_id, next_id, BPF_PROG_GET_NEXT_ID); |
1023 | } | |
95b9afd3 | 1024 | |
a6e130c4 QM |
1025 | int bpf_map_get_next_id(__u32 start_id, __u32 *next_id) |
1026 | { | |
1027 | return bpf_obj_get_next_id(start_id, next_id, BPF_MAP_GET_NEXT_ID); | |
95b9afd3 MKL |
1028 | } |
1029 | ||
09d7c2e3 QM |
1030 | int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id) |
1031 | { | |
1032 | return bpf_obj_get_next_id(start_id, next_id, BPF_BTF_GET_NEXT_ID); | |
1033 | } | |
1034 | ||
0dbc8668 AN |
1035 | int bpf_link_get_next_id(__u32 start_id, __u32 *next_id) |
1036 | { | |
1037 | return bpf_obj_get_next_id(start_id, next_id, BPF_LINK_GET_NEXT_ID); | |
1038 | } | |
1039 | ||
8f13f168 RS |
1040 | int bpf_prog_get_fd_by_id_opts(__u32 id, |
1041 | const struct bpf_get_fd_by_id_opts *opts) | |
95b9afd3 | 1042 | { |
813847a3 | 1043 | const size_t attr_sz = offsetofend(union bpf_attr, open_flags); |
95b9afd3 | 1044 | union bpf_attr attr; |
f12b6543 | 1045 | int fd; |
95b9afd3 | 1046 | |
8f13f168 RS |
1047 | if (!OPTS_VALID(opts, bpf_get_fd_by_id_opts)) |
1048 | return libbpf_err(-EINVAL); | |
1049 | ||
813847a3 | 1050 | memset(&attr, 0, attr_sz); |
95b9afd3 | 1051 | attr.prog_id = id; |
8f13f168 | 1052 | attr.open_flags = OPTS_GET(opts, open_flags, 0); |
95b9afd3 | 1053 | |
813847a3 | 1054 | fd = sys_bpf_fd(BPF_PROG_GET_FD_BY_ID, &attr, attr_sz); |
f12b6543 | 1055 | return libbpf_err_errno(fd); |
95b9afd3 MKL |
1056 | } |
1057 | ||
8f13f168 RS |
1058 | int bpf_prog_get_fd_by_id(__u32 id) |
1059 | { | |
1060 | return bpf_prog_get_fd_by_id_opts(id, NULL); | |
1061 | } | |
1062 | ||
243e3005 RS |
1063 | int bpf_map_get_fd_by_id_opts(__u32 id, |
1064 | const struct bpf_get_fd_by_id_opts *opts) | |
95b9afd3 | 1065 | { |
813847a3 | 1066 | const size_t attr_sz = offsetofend(union bpf_attr, open_flags); |
95b9afd3 | 1067 | union bpf_attr attr; |
f12b6543 | 1068 | int fd; |
95b9afd3 | 1069 | |
243e3005 RS |
1070 | if (!OPTS_VALID(opts, bpf_get_fd_by_id_opts)) |
1071 | return libbpf_err(-EINVAL); | |
1072 | ||
813847a3 | 1073 | memset(&attr, 0, attr_sz); |
95b9afd3 | 1074 | attr.map_id = id; |
243e3005 | 1075 | attr.open_flags = OPTS_GET(opts, open_flags, 0); |
95b9afd3 | 1076 | |
813847a3 | 1077 | fd = sys_bpf_fd(BPF_MAP_GET_FD_BY_ID, &attr, attr_sz); |
f12b6543 | 1078 | return libbpf_err_errno(fd); |
95b9afd3 MKL |
1079 | } |
1080 | ||
243e3005 RS |
1081 | int bpf_map_get_fd_by_id(__u32 id) |
1082 | { | |
1083 | return bpf_map_get_fd_by_id_opts(id, NULL); | |
1084 | } | |
1085 | ||
2ce7cbf2 RS |
1086 | int bpf_btf_get_fd_by_id_opts(__u32 id, |
1087 | const struct bpf_get_fd_by_id_opts *opts) | |
cd8b8928 | 1088 | { |
813847a3 | 1089 | const size_t attr_sz = offsetofend(union bpf_attr, open_flags); |
cd8b8928 | 1090 | union bpf_attr attr; |
f12b6543 | 1091 | int fd; |
cd8b8928 | 1092 | |
2ce7cbf2 RS |
1093 | if (!OPTS_VALID(opts, bpf_get_fd_by_id_opts)) |
1094 | return libbpf_err(-EINVAL); | |
1095 | ||
813847a3 | 1096 | memset(&attr, 0, attr_sz); |
cd8b8928 | 1097 | attr.btf_id = id; |
2ce7cbf2 | 1098 | attr.open_flags = OPTS_GET(opts, open_flags, 0); |
cd8b8928 | 1099 | |
813847a3 | 1100 | fd = sys_bpf_fd(BPF_BTF_GET_FD_BY_ID, &attr, attr_sz); |
f12b6543 | 1101 | return libbpf_err_errno(fd); |
cd8b8928 MKL |
1102 | } |
1103 | ||
2ce7cbf2 RS |
1104 | int bpf_btf_get_fd_by_id(__u32 id) |
1105 | { | |
1106 | return bpf_btf_get_fd_by_id_opts(id, NULL); | |
1107 | } | |
1108 | ||
97c8f9dd RS |
1109 | int bpf_link_get_fd_by_id_opts(__u32 id, |
1110 | const struct bpf_get_fd_by_id_opts *opts) | |
0dbc8668 | 1111 | { |
813847a3 | 1112 | const size_t attr_sz = offsetofend(union bpf_attr, open_flags); |
0dbc8668 | 1113 | union bpf_attr attr; |
f12b6543 | 1114 | int fd; |
0dbc8668 | 1115 | |
97c8f9dd RS |
1116 | if (!OPTS_VALID(opts, bpf_get_fd_by_id_opts)) |
1117 | return libbpf_err(-EINVAL); | |
1118 | ||
813847a3 | 1119 | memset(&attr, 0, attr_sz); |
0dbc8668 | 1120 | attr.link_id = id; |
97c8f9dd | 1121 | attr.open_flags = OPTS_GET(opts, open_flags, 0); |
0dbc8668 | 1122 | |
813847a3 | 1123 | fd = sys_bpf_fd(BPF_LINK_GET_FD_BY_ID, &attr, attr_sz); |
f12b6543 | 1124 | return libbpf_err_errno(fd); |
0dbc8668 AN |
1125 | } |
1126 | ||
97c8f9dd RS |
1127 | int bpf_link_get_fd_by_id(__u32 id) |
1128 | { | |
1129 | return bpf_link_get_fd_by_id_opts(id, NULL); | |
1130 | } | |
1131 | ||
0dbc8668 | 1132 | int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len) |
95b9afd3 | 1133 | { |
813847a3 | 1134 | const size_t attr_sz = offsetofend(union bpf_attr, info); |
95b9afd3 MKL |
1135 | union bpf_attr attr; |
1136 | int err; | |
1137 | ||
813847a3 | 1138 | memset(&attr, 0, attr_sz); |
0dbc8668 | 1139 | attr.info.bpf_fd = bpf_fd; |
95b9afd3 MKL |
1140 | attr.info.info_len = *info_len; |
1141 | attr.info.info = ptr_to_u64(info); | |
1142 | ||
813847a3 | 1143 | err = sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, attr_sz); |
95b9afd3 MKL |
1144 | if (!err) |
1145 | *info_len = attr.info.info_len; | |
f12b6543 | 1146 | return libbpf_err_errno(err); |
95b9afd3 | 1147 | } |
949abbe8 | 1148 | |
55a9ed0e IL |
1149 | int bpf_prog_get_info_by_fd(int prog_fd, struct bpf_prog_info *info, __u32 *info_len) |
1150 | { | |
1151 | return bpf_obj_get_info_by_fd(prog_fd, info, info_len); | |
1152 | } | |
1153 | ||
1154 | int bpf_map_get_info_by_fd(int map_fd, struct bpf_map_info *info, __u32 *info_len) | |
1155 | { | |
1156 | return bpf_obj_get_info_by_fd(map_fd, info, info_len); | |
1157 | } | |
1158 | ||
1159 | int bpf_btf_get_info_by_fd(int btf_fd, struct bpf_btf_info *info, __u32 *info_len) | |
1160 | { | |
1161 | return bpf_obj_get_info_by_fd(btf_fd, info, info_len); | |
1162 | } | |
1163 | ||
1164 | int bpf_link_get_info_by_fd(int link_fd, struct bpf_link_info *info, __u32 *info_len) | |
1165 | { | |
1166 | return bpf_obj_get_info_by_fd(link_fd, info, info_len); | |
1167 | } | |
1168 | ||
a0fe3e57 AS |
1169 | int bpf_raw_tracepoint_open(const char *name, int prog_fd) |
1170 | { | |
813847a3 | 1171 | const size_t attr_sz = offsetofend(union bpf_attr, raw_tracepoint); |
a0fe3e57 | 1172 | union bpf_attr attr; |
f12b6543 | 1173 | int fd; |
a0fe3e57 | 1174 | |
813847a3 | 1175 | memset(&attr, 0, attr_sz); |
a0fe3e57 AS |
1176 | attr.raw_tracepoint.name = ptr_to_u64(name); |
1177 | attr.raw_tracepoint.prog_fd = prog_fd; | |
1178 | ||
813847a3 | 1179 | fd = sys_bpf_fd(BPF_RAW_TRACEPOINT_OPEN, &attr, attr_sz); |
f12b6543 | 1180 | return libbpf_err_errno(fd); |
a0fe3e57 AS |
1181 | } |
1182 | ||
097d8002 | 1183 | int bpf_btf_load(const void *btf_data, size_t btf_size, struct bpf_btf_load_opts *opts) |
8a138aed | 1184 | { |
d17aff80 | 1185 | const size_t attr_sz = offsetofend(union bpf_attr, btf_log_true_size); |
0ed08d67 AN |
1186 | union bpf_attr attr; |
1187 | char *log_buf; | |
1188 | size_t log_size; | |
1189 | __u32 log_level; | |
8a138aed MKL |
1190 | int fd; |
1191 | ||
e542f2c4 AN |
1192 | bump_rlimit_memlock(); |
1193 | ||
0ed08d67 AN |
1194 | memset(&attr, 0, attr_sz); |
1195 | ||
1196 | if (!OPTS_VALID(opts, bpf_btf_load_opts)) | |
1197 | return libbpf_err(-EINVAL); | |
1198 | ||
1199 | log_buf = OPTS_GET(opts, log_buf, NULL); | |
1200 | log_size = OPTS_GET(opts, log_size, 0); | |
1201 | log_level = OPTS_GET(opts, log_level, 0); | |
1202 | ||
1203 | if (log_size > UINT_MAX) | |
1204 | return libbpf_err(-EINVAL); | |
1205 | if (log_size && !log_buf) | |
1206 | return libbpf_err(-EINVAL); | |
1207 | ||
1208 | attr.btf = ptr_to_u64(btf_data); | |
8a138aed | 1209 | attr.btf_size = btf_size; |
0ed08d67 AN |
1210 | /* log_level == 0 and log_buf != NULL means "try loading without |
1211 | * log_buf, but retry with log_buf and log_level=1 on error", which is | |
1212 | * consistent across low-level and high-level BTF and program loading | |
1213 | * APIs within libbpf and provides a sensible behavior in practice | |
1214 | */ | |
1215 | if (log_level) { | |
1216 | attr.btf_log_buf = ptr_to_u64(log_buf); | |
1217 | attr.btf_log_size = (__u32)log_size; | |
1218 | attr.btf_log_level = log_level; | |
1219 | } | |
8a138aed | 1220 | |
0ed08d67 AN |
1221 | fd = sys_bpf_fd(BPF_BTF_LOAD, &attr, attr_sz); |
1222 | if (fd < 0 && log_buf && log_level == 0) { | |
8a138aed | 1223 | attr.btf_log_buf = ptr_to_u64(log_buf); |
0ed08d67 AN |
1224 | attr.btf_log_size = (__u32)log_size; |
1225 | attr.btf_log_level = 1; | |
1226 | fd = sys_bpf_fd(BPF_BTF_LOAD, &attr, attr_sz); | |
8a138aed | 1227 | } |
097d8002 AN |
1228 | |
1229 | OPTS_SET(opts, log_true_size, attr.btf_log_true_size); | |
0ed08d67 AN |
1230 | return libbpf_err_errno(fd); |
1231 | } | |
1232 | ||
30687ad9 YS |
1233 | int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len, |
1234 | __u32 *prog_id, __u32 *fd_type, __u64 *probe_offset, | |
1235 | __u64 *probe_addr) | |
1236 | { | |
813847a3 AN |
1237 | const size_t attr_sz = offsetofend(union bpf_attr, task_fd_query); |
1238 | union bpf_attr attr; | |
30687ad9 YS |
1239 | int err; |
1240 | ||
813847a3 | 1241 | memset(&attr, 0, attr_sz); |
30687ad9 YS |
1242 | attr.task_fd_query.pid = pid; |
1243 | attr.task_fd_query.fd = fd; | |
1244 | attr.task_fd_query.flags = flags; | |
1245 | attr.task_fd_query.buf = ptr_to_u64(buf); | |
1246 | attr.task_fd_query.buf_len = *buf_len; | |
1247 | ||
813847a3 | 1248 | err = sys_bpf(BPF_TASK_FD_QUERY, &attr, attr_sz); |
f12b6543 | 1249 | |
30687ad9 YS |
1250 | *buf_len = attr.task_fd_query.buf_len; |
1251 | *prog_id = attr.task_fd_query.prog_id; | |
1252 | *fd_type = attr.task_fd_query.fd_type; | |
1253 | *probe_offset = attr.task_fd_query.probe_offset; | |
1254 | *probe_addr = attr.task_fd_query.probe_addr; | |
1255 | ||
f12b6543 | 1256 | return libbpf_err_errno(err); |
30687ad9 | 1257 | } |
0bee1067 SL |
1258 | |
1259 | int bpf_enable_stats(enum bpf_stats_type type) | |
1260 | { | |
813847a3 | 1261 | const size_t attr_sz = offsetofend(union bpf_attr, enable_stats); |
0bee1067 | 1262 | union bpf_attr attr; |
f12b6543 | 1263 | int fd; |
0bee1067 | 1264 | |
813847a3 | 1265 | memset(&attr, 0, attr_sz); |
0bee1067 SL |
1266 | attr.enable_stats.type = type; |
1267 | ||
813847a3 | 1268 | fd = sys_bpf_fd(BPF_ENABLE_STATS, &attr, attr_sz); |
f12b6543 | 1269 | return libbpf_err_errno(fd); |
0bee1067 | 1270 | } |
5d23328d YZ |
1271 | |
1272 | int bpf_prog_bind_map(int prog_fd, int map_fd, | |
1273 | const struct bpf_prog_bind_opts *opts) | |
1274 | { | |
813847a3 | 1275 | const size_t attr_sz = offsetofend(union bpf_attr, prog_bind_map); |
5d23328d | 1276 | union bpf_attr attr; |
f12b6543 | 1277 | int ret; |
5d23328d YZ |
1278 | |
1279 | if (!OPTS_VALID(opts, bpf_prog_bind_opts)) | |
f12b6543 | 1280 | return libbpf_err(-EINVAL); |
5d23328d | 1281 | |
813847a3 | 1282 | memset(&attr, 0, attr_sz); |
5d23328d YZ |
1283 | attr.prog_bind_map.prog_fd = prog_fd; |
1284 | attr.prog_bind_map.map_fd = map_fd; | |
1285 | attr.prog_bind_map.flags = OPTS_GET(opts, flags, 0); | |
1286 | ||
813847a3 | 1287 | ret = sys_bpf(BPF_PROG_BIND_MAP, &attr, attr_sz); |
f12b6543 | 1288 | return libbpf_err_errno(ret); |
5d23328d | 1289 | } |