tools/lib/bpf/bpf.c

   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
  60 static inline __u64 ptr_to_u64(const void *ptr)
  61 {
  62         return (__u64) (unsigned long) ptr;
  63 }
  64
  65 static 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
  71 static 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
  82 int 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
 110 int 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
 130 int 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
 144 int 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
 160 int 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
 186 int 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
 195 static void *
 196 alloc_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
 220 int 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.attach_btf_id = load_attr->attach_btf_id;
 240         } else if (attr.prog_type == BPF_PROG_TYPE_TRACING ||
 241                    attr.prog_type == BPF_PROG_TYPE_EXT) {
 242                 attr.attach_btf_id = load_attr->attach_btf_id;
 243                 attr.attach_prog_fd = load_attr->attach_prog_fd;
 244         } else {
 245                 attr.prog_ifindex = load_attr->prog_ifindex;
 246                 attr.kern_version = load_attr->kern_version;
 247         }
 248         attr.insn_cnt = (__u32)load_attr->insns_cnt;
 249         attr.insns = ptr_to_u64(load_attr->insns);
 250         attr.license = ptr_to_u64(load_attr->license);
 251
 252         attr.log_level = log_level;
 253         if (log_level) {
 254                 attr.log_buf = ptr_to_u64(log_buf);
 255                 attr.log_size = log_buf_sz;
 256         } else {
 257                 attr.log_buf = ptr_to_u64(NULL);
 258                 attr.log_size = 0;
 259         }
 260
 261         attr.prog_btf_fd = load_attr->prog_btf_fd;
 262         attr.func_info_rec_size = load_attr->func_info_rec_size;
 263         attr.func_info_cnt = load_attr->func_info_cnt;
 264         attr.func_info = ptr_to_u64(load_attr->func_info);
 265         attr.line_info_rec_size = load_attr->line_info_rec_size;
 266         attr.line_info_cnt = load_attr->line_info_cnt;
 267         attr.line_info = ptr_to_u64(load_attr->line_info);
 268         if (load_attr->name)
 269                 memcpy(attr.prog_name, load_attr->name,
 270                        min(strlen(load_attr->name), BPF_OBJ_NAME_LEN - 1));
 271         attr.prog_flags = load_attr->prog_flags;
 272
 273         fd = sys_bpf_prog_load(&attr, sizeof(attr));
 274         if (fd >= 0)
 275                 return fd;
 276
 277         /* After bpf_prog_load, the kernel may modify certain attributes
 278          * to give user space a hint how to deal with loading failure.
 279          * Check to see whether we can make some changes and load again.
 280          */
 281         while (errno == E2BIG && (!finfo || !linfo)) {
 282                 if (!finfo && attr.func_info_cnt &&
 283                     attr.func_info_rec_size < load_attr->func_info_rec_size) {
 284                         /* try with corrected func info records */
 285                         finfo = alloc_zero_tailing_info(load_attr->func_info,
 286                                                         load_attr->func_info_cnt,
 287                                                         load_attr->func_info_rec_size,
 288                                                         attr.func_info_rec_size);
 289                         if (!finfo)
 290                                 goto done;
 291
 292                         attr.func_info = ptr_to_u64(finfo);
 293                         attr.func_info_rec_size = load_attr->func_info_rec_size;
 294                 } else if (!linfo && attr.line_info_cnt &&
 295                            attr.line_info_rec_size <
 296                            load_attr->line_info_rec_size) {
 297                         linfo = alloc_zero_tailing_info(load_attr->line_info,
 298                                                         load_attr->line_info_cnt,
 299                                                         load_attr->line_info_rec_size,
 300                                                         attr.line_info_rec_size);
 301                         if (!linfo)
 302                                 goto done;
 303
 304                         attr.line_info = ptr_to_u64(linfo);
 305                         attr.line_info_rec_size = load_attr->line_info_rec_size;
 306                 } else {
 307                         break;
 308                 }
 309
 310                 fd = sys_bpf_prog_load(&attr, sizeof(attr));
 311
 312                 if (fd >= 0)
 313                         goto done;
 314         }
 315
 316         if (log_level || !log_buf)
 317                 goto done;
 318
 319         /* Try again with log */
 320         attr.log_buf = ptr_to_u64(log_buf);
 321         attr.log_size = log_buf_sz;
 322         attr.log_level = 1;
 323         log_buf[0] = 0;
 324         fd = sys_bpf_prog_load(&attr, sizeof(attr));
 325 done:
 326         free(finfo);
 327         free(linfo);
 328         return fd;
 329 }
 330
 331 int bpf_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
 332                      size_t insns_cnt, const char *license,
 333                      __u32 kern_version, char *log_buf,
 334                      size_t log_buf_sz)
 335 {
 336         struct bpf_load_program_attr load_attr;
 337
 338         memset(&load_attr, 0, sizeof(struct bpf_load_program_attr));
 339         load_attr.prog_type = type;
 340         load_attr.expected_attach_type = 0;
 341         load_attr.name = NULL;
 342         load_attr.insns = insns;
 343         load_attr.insns_cnt = insns_cnt;
 344         load_attr.license = license;
 345         load_attr.kern_version = kern_version;
 346
 347         return bpf_load_program_xattr(&load_attr, log_buf, log_buf_sz);
 348 }
 349
 350 int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns,
 351                        size_t insns_cnt, __u32 prog_flags, const char *license,
 352                        __u32 kern_version, char *log_buf, size_t log_buf_sz,
 353                        int log_level)
 354 {
 355         union bpf_attr attr;
 356
 357         memset(&attr, 0, sizeof(attr));
 358         attr.prog_type = type;
 359         attr.insn_cnt = (__u32)insns_cnt;
 360         attr.insns = ptr_to_u64(insns);
 361         attr.license = ptr_to_u64(license);
 362         attr.log_buf = ptr_to_u64(log_buf);
 363         attr.log_size = log_buf_sz;
 364         attr.log_level = log_level;
 365         log_buf[0] = 0;
 366         attr.kern_version = kern_version;
 367         attr.prog_flags = prog_flags;
 368
 369         return sys_bpf_prog_load(&attr, sizeof(attr));
 370 }
 371
 372 int bpf_map_update_elem(int fd, const void *key, const void *value,
 373                         __u64 flags)
 374 {
 375         union bpf_attr attr;
 376
 377         memset(&attr, 0, sizeof(attr));
 378         attr.map_fd = fd;
 379         attr.key = ptr_to_u64(key);
 380         attr.value = ptr_to_u64(value);
 381         attr.flags = flags;
 382
 383         return sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
 384 }
 385
 386 int bpf_map_lookup_elem(int fd, const void *key, void *value)
 387 {
 388         union bpf_attr attr;
 389
 390         memset(&attr, 0, sizeof(attr));
 391         attr.map_fd = fd;
 392         attr.key = ptr_to_u64(key);
 393         attr.value = ptr_to_u64(value);
 394
 395         return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
 396 }
 397
 398 int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, __u64 flags)
 399 {
 400         union bpf_attr attr;
 401
 402         memset(&attr, 0, sizeof(attr));
 403         attr.map_fd = fd;
 404         attr.key = ptr_to_u64(key);
 405         attr.value = ptr_to_u64(value);
 406         attr.flags = flags;
 407
 408         return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
 409 }
 410
 411 int bpf_map_lookup_and_delete_elem(int fd, const void *key, void *value)
 412 {
 413         union bpf_attr attr;
 414
 415         memset(&attr, 0, sizeof(attr));
 416         attr.map_fd = fd;
 417         attr.key = ptr_to_u64(key);
 418         attr.value = ptr_to_u64(value);
 419
 420         return sys_bpf(BPF_MAP_LOOKUP_AND_DELETE_ELEM, &attr, sizeof(attr));
 421 }
 422
 423 int bpf_map_delete_elem(int fd, const void *key)
 424 {
 425         union bpf_attr attr;
 426
 427         memset(&attr, 0, sizeof(attr));
 428         attr.map_fd = fd;
 429         attr.key = ptr_to_u64(key);
 430
 431         return sys_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
 432 }
 433
 434 int bpf_map_get_next_key(int fd, const void *key, void *next_key)
 435 {
 436         union bpf_attr attr;
 437
 438         memset(&attr, 0, sizeof(attr));
 439         attr.map_fd = fd;
 440         attr.key = ptr_to_u64(key);
 441         attr.next_key = ptr_to_u64(next_key);
 442
 443         return sys_bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr));
 444 }
 445
 446 int bpf_map_freeze(int fd)
 447 {
 448         union bpf_attr attr;
 449
 450         memset(&attr, 0, sizeof(attr));
 451         attr.map_fd = fd;
 452
 453         return sys_bpf(BPF_MAP_FREEZE, &attr, sizeof(attr));
 454 }
 455
 456 static int bpf_map_batch_common(int cmd, int fd, void  *in_batch,
 457                                 void *out_batch, void *keys, void *values,
 458                                 __u32 *count,
 459                                 const struct bpf_map_batch_opts *opts)
 460 {
 461         union bpf_attr attr;
 462         int ret;
 463
 464         if (!OPTS_VALID(opts, bpf_map_batch_opts))
 465                 return -EINVAL;
 466
 467         memset(&attr, 0, sizeof(attr));
 468         attr.batch.map_fd = fd;
 469         attr.batch.in_batch = ptr_to_u64(in_batch);
 470         attr.batch.out_batch = ptr_to_u64(out_batch);
 471         attr.batch.keys = ptr_to_u64(keys);
 472         attr.batch.values = ptr_to_u64(values);
 473         attr.batch.count = *count;
 474         attr.batch.elem_flags  = OPTS_GET(opts, elem_flags, 0);
 475         attr.batch.flags = OPTS_GET(opts, flags, 0);
 476
 477         ret = sys_bpf(cmd, &attr, sizeof(attr));
 478         *count = attr.batch.count;
 479
 480         return ret;
 481 }
 482
 483 int bpf_map_delete_batch(int fd, void *keys, __u32 *count,
 484                          const struct bpf_map_batch_opts *opts)
 485 {
 486         return bpf_map_batch_common(BPF_MAP_DELETE_BATCH, fd, NULL,
 487                                     NULL, keys, NULL, count, opts);
 488 }
 489
 490 int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch, void *keys,
 491                          void *values, __u32 *count,
 492                          const struct bpf_map_batch_opts *opts)
 493 {
 494         return bpf_map_batch_common(BPF_MAP_LOOKUP_BATCH, fd, in_batch,
 495                                     out_batch, keys, values, count, opts);
 496 }
 497
 498 int bpf_map_lookup_and_delete_batch(int fd, void *in_batch, void *out_batch,
 499                                     void *keys, void *values, __u32 *count,
 500                                     const struct bpf_map_batch_opts *opts)
 501 {
 502         return bpf_map_batch_common(BPF_MAP_LOOKUP_AND_DELETE_BATCH,
 503                                     fd, in_batch, out_batch, keys, values,
 504                                     count, opts);
 505 }
 506
 507 int bpf_map_update_batch(int fd, void *keys, void *values, __u32 *count,
 508                          const struct bpf_map_batch_opts *opts)
 509 {
 510         return bpf_map_batch_common(BPF_MAP_UPDATE_BATCH, fd, NULL, NULL,
 511                                     keys, values, count, opts);
 512 }
 513
 514 int bpf_obj_pin(int fd, const char *pathname)
 515 {
 516         union bpf_attr attr;
 517
 518         memset(&attr, 0, sizeof(attr));
 519         attr.pathname = ptr_to_u64((void *)pathname);
 520         attr.bpf_fd = fd;
 521
 522         return sys_bpf(BPF_OBJ_PIN, &attr, sizeof(attr));
 523 }
 524
 525 int bpf_obj_get(const char *pathname)
 526 {
 527         union bpf_attr attr;
 528
 529         memset(&attr, 0, sizeof(attr));
 530         attr.pathname = ptr_to_u64((void *)pathname);
 531
 532         return sys_bpf(BPF_OBJ_GET, &attr, sizeof(attr));
 533 }
 534
 535 int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type,
 536                     unsigned int flags)
 537 {
 538         DECLARE_LIBBPF_OPTS(bpf_prog_attach_opts, opts,
 539                 .flags = flags,
 540         );
 541
 542         return bpf_prog_attach_xattr(prog_fd, target_fd, type, &opts);
 543 }
 544
 545 int bpf_prog_attach_xattr(int prog_fd, int target_fd,
 546                           enum bpf_attach_type type,
 547                           const struct bpf_prog_attach_opts *opts)
 548 {
 549         union bpf_attr attr;
 550
 551         if (!OPTS_VALID(opts, bpf_prog_attach_opts))
 552                 return -EINVAL;
 553
 554         memset(&attr, 0, sizeof(attr));
 555         attr.target_fd     = target_fd;
 556         attr.attach_bpf_fd = prog_fd;
 557         attr.attach_type   = type;
 558         attr.attach_flags  = OPTS_GET(opts, flags, 0);
 559         attr.replace_bpf_fd = OPTS_GET(opts, replace_prog_fd, 0);
 560
 561         return sys_bpf(BPF_PROG_ATTACH, &attr, sizeof(attr));
 562 }
 563
 564 int bpf_prog_detach(int target_fd, enum bpf_attach_type type)
 565 {
 566         union bpf_attr attr;
 567
 568         memset(&attr, 0, sizeof(attr));
 569         attr.target_fd   = target_fd;
 570         attr.attach_type = type;
 571
 572         return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
 573 }
 574
 575 int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type)
 576 {
 577         union bpf_attr attr;
 578
 579         memset(&attr, 0, sizeof(attr));
 580         attr.target_fd   = target_fd;
 581         attr.attach_bpf_fd = prog_fd;
 582         attr.attach_type = type;
 583
 584         return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));
 585 }
 586
 587 int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
 588                    __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt)
 589 {
 590         union bpf_attr attr;
 591         int ret;
 592
 593         memset(&attr, 0, sizeof(attr));
 594         attr.query.target_fd    = target_fd;
 595         attr.query.attach_type  = type;
 596         attr.query.query_flags  = query_flags;
 597         attr.query.prog_cnt     = *prog_cnt;
 598         attr.query.prog_ids     = ptr_to_u64(prog_ids);
 599
 600         ret = sys_bpf(BPF_PROG_QUERY, &attr, sizeof(attr));
 601         if (attach_flags)
 602                 *attach_flags = attr.query.attach_flags;
 603         *prog_cnt = attr.query.prog_cnt;
 604         return ret;
 605 }
 606
 607 int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
 608                       void *data_out, __u32 *size_out, __u32 *retval,
 609                       __u32 *duration)
 610 {
 611         union bpf_attr attr;
 612         int ret;
 613
 614         memset(&attr, 0, sizeof(attr));
 615         attr.test.prog_fd = prog_fd;
 616         attr.test.data_in = ptr_to_u64(data);
 617         attr.test.data_out = ptr_to_u64(data_out);
 618         attr.test.data_size_in = size;
 619         attr.test.repeat = repeat;
 620
 621         ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
 622         if (size_out)
 623                 *size_out = attr.test.data_size_out;
 624         if (retval)
 625                 *retval = attr.test.retval;
 626         if (duration)
 627                 *duration = attr.test.duration;
 628         return ret;
 629 }
 630
 631 int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
 632 {
 633         union bpf_attr attr;
 634         int ret;
 635
 636         if (!test_attr->data_out && test_attr->data_size_out > 0)
 637                 return -EINVAL;
 638
 639         memset(&attr, 0, sizeof(attr));
 640         attr.test.prog_fd = test_attr->prog_fd;
 641         attr.test.data_in = ptr_to_u64(test_attr->data_in);
 642         attr.test.data_out = ptr_to_u64(test_attr->data_out);
 643         attr.test.data_size_in = test_attr->data_size_in;
 644         attr.test.data_size_out = test_attr->data_size_out;
 645         attr.test.ctx_in = ptr_to_u64(test_attr->ctx_in);
 646         attr.test.ctx_out = ptr_to_u64(test_attr->ctx_out);
 647         attr.test.ctx_size_in = test_attr->ctx_size_in;
 648         attr.test.ctx_size_out = test_attr->ctx_size_out;
 649         attr.test.repeat = test_attr->repeat;
 650
 651         ret = sys_bpf(BPF_PROG_TEST_RUN, &attr, sizeof(attr));
 652         test_attr->data_size_out = attr.test.data_size_out;
 653         test_attr->ctx_size_out = attr.test.ctx_size_out;
 654         test_attr->retval = attr.test.retval;
 655         test_attr->duration = attr.test.duration;
 656         return ret;
 657 }
 658
 659 static int bpf_obj_get_next_id(__u32 start_id, __u32 *next_id, int cmd)
 660 {
 661         union bpf_attr attr;
 662         int err;
 663
 664         memset(&attr, 0, sizeof(attr));
 665         attr.start_id = start_id;
 666
 667         err = sys_bpf(cmd, &attr, sizeof(attr));
 668         if (!err)
 669                 *next_id = attr.next_id;
 670
 671         return err;
 672 }
 673
 674 int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id)
 675 {
 676         return bpf_obj_get_next_id(start_id, next_id, BPF_PROG_GET_NEXT_ID);
 677 }
 678
 679 int bpf_map_get_next_id(__u32 start_id, __u32 *next_id)
 680 {
 681         return bpf_obj_get_next_id(start_id, next_id, BPF_MAP_GET_NEXT_ID);
 682 }
 683
 684 int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id)
 685 {
 686         return bpf_obj_get_next_id(start_id, next_id, BPF_BTF_GET_NEXT_ID);
 687 }
 688
 689 int bpf_prog_get_fd_by_id(__u32 id)
 690 {
 691         union bpf_attr attr;
 692
 693         memset(&attr, 0, sizeof(attr));
 694         attr.prog_id = id;
 695
 696         return sys_bpf(BPF_PROG_GET_FD_BY_ID, &attr, sizeof(attr));
 697 }
 698
 699 int bpf_map_get_fd_by_id(__u32 id)
 700 {
 701         union bpf_attr attr;
 702
 703         memset(&attr, 0, sizeof(attr));
 704         attr.map_id = id;
 705
 706         return sys_bpf(BPF_MAP_GET_FD_BY_ID, &attr, sizeof(attr));
 707 }
 708
 709 int bpf_btf_get_fd_by_id(__u32 id)
 710 {
 711         union bpf_attr attr;
 712
 713         memset(&attr, 0, sizeof(attr));
 714         attr.btf_id = id;
 715
 716         return sys_bpf(BPF_BTF_GET_FD_BY_ID, &attr, sizeof(attr));
 717 }
 718
 719 int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len)
 720 {
 721         union bpf_attr attr;
 722         int err;
 723
 724         memset(&attr, 0, sizeof(attr));
 725         attr.info.bpf_fd = prog_fd;
 726         attr.info.info_len = *info_len;
 727         attr.info.info = ptr_to_u64(info);
 728
 729         err = sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
 730         if (!err)
 731                 *info_len = attr.info.info_len;
 732
 733         return err;
 734 }
 735
 736 int bpf_raw_tracepoint_open(const char *name, int prog_fd)
 737 {
 738         union bpf_attr attr;
 739
 740         memset(&attr, 0, sizeof(attr));
 741         attr.raw_tracepoint.name = ptr_to_u64(name);
 742         attr.raw_tracepoint.prog_fd = prog_fd;
 743
 744         return sys_bpf(BPF_RAW_TRACEPOINT_OPEN, &attr, sizeof(attr));
 745 }
 746
 747 int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf, __u32 log_buf_size,
 748                  bool do_log)
 749 {
 750         union bpf_attr attr = {};
 751         int fd;
 752
 753         attr.btf = ptr_to_u64(btf);
 754         attr.btf_size = btf_size;
 755
 756 retry:
 757         if (do_log && log_buf && log_buf_size) {
 758                 attr.btf_log_level = 1;
 759                 attr.btf_log_size = log_buf_size;
 760                 attr.btf_log_buf = ptr_to_u64(log_buf);
 761         }
 762
 763         fd = sys_bpf(BPF_BTF_LOAD, &attr, sizeof(attr));
 764         if (fd == -1 && !do_log && log_buf && log_buf_size) {
 765                 do_log = true;
 766                 goto retry;
 767         }
 768
 769         return fd;
 770 }
 771
 772 int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
 773                       __u32 *prog_id, __u32 *fd_type, __u64 *probe_offset,
 774                       __u64 *probe_addr)
 775 {
 776         union bpf_attr attr = {};
 777         int err;
 778
 779         attr.task_fd_query.pid = pid;
 780         attr.task_fd_query.fd = fd;
 781         attr.task_fd_query.flags = flags;
 782         attr.task_fd_query.buf = ptr_to_u64(buf);
 783         attr.task_fd_query.buf_len = *buf_len;
 784
 785         err = sys_bpf(BPF_TASK_FD_QUERY, &attr, sizeof(attr));
 786         *buf_len = attr.task_fd_query.buf_len;
 787         *prog_id = attr.task_fd_query.prog_id;
 788         *fd_type = attr.task_fd_query.fd_type;
 789         *probe_offset = attr.task_fd_query.probe_offset;
 790         *probe_addr = attr.task_fd_query.probe_addr;
 791
 792         return err;
 793 }