1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */ 3 4 #define _GNU_SOURCE 5 #include <errno.h> 6 #include <fcntl.h> 7 #include <signal.h> 8 #include <stdarg.h> 9 #include <stdio.h> 10 #include <stdlib.h> 11 #include <string.h> 12 #include <time.h> 13 #include <unistd.h> 14 #include <net/if.h> 15 #include <sys/ioctl.h> 16 #include <sys/types.h> 17 #include <sys/stat.h> 18 #include <sys/syscall.h> 19 #include <dirent.h> 20 21 #include <linux/err.h> 22 #include <linux/perf_event.h> 23 #include <linux/sizes.h> 24 25 #include <bpf/bpf.h> 26 #include <bpf/btf.h> 27 #include <bpf/hashmap.h> 28 #include <bpf/libbpf.h> 29 #include <bpf/skel_internal.h> 30 31 #include "cfg.h" 32 #include "main.h" 33 #include "xlated_dumper.h" 34 35 #define BPF_METADATA_PREFIX "bpf_metadata_" 36 #define BPF_METADATA_PREFIX_LEN (sizeof(BPF_METADATA_PREFIX) - 1) 37 38 const char * const prog_type_name[] = { 39 [BPF_PROG_TYPE_UNSPEC] = "unspec", 40 [BPF_PROG_TYPE_SOCKET_FILTER] = "socket_filter", 41 [BPF_PROG_TYPE_KPROBE] = "kprobe", 42 [BPF_PROG_TYPE_SCHED_CLS] = "sched_cls", 43 [BPF_PROG_TYPE_SCHED_ACT] = "sched_act", 44 [BPF_PROG_TYPE_TRACEPOINT] = "tracepoint", 45 [BPF_PROG_TYPE_XDP] = "xdp", 46 [BPF_PROG_TYPE_PERF_EVENT] = "perf_event", 47 [BPF_PROG_TYPE_CGROUP_SKB] = "cgroup_skb", 48 [BPF_PROG_TYPE_CGROUP_SOCK] = "cgroup_sock", 49 [BPF_PROG_TYPE_LWT_IN] = "lwt_in", 50 [BPF_PROG_TYPE_LWT_OUT] = "lwt_out", 51 [BPF_PROG_TYPE_LWT_XMIT] = "lwt_xmit", 52 [BPF_PROG_TYPE_SOCK_OPS] = "sock_ops", 53 [BPF_PROG_TYPE_SK_SKB] = "sk_skb", 54 [BPF_PROG_TYPE_CGROUP_DEVICE] = "cgroup_device", 55 [BPF_PROG_TYPE_SK_MSG] = "sk_msg", 56 [BPF_PROG_TYPE_RAW_TRACEPOINT] = "raw_tracepoint", 57 [BPF_PROG_TYPE_CGROUP_SOCK_ADDR] = "cgroup_sock_addr", 58 [BPF_PROG_TYPE_LWT_SEG6LOCAL] = "lwt_seg6local", 59 [BPF_PROG_TYPE_LIRC_MODE2] = "lirc_mode2", 60 [BPF_PROG_TYPE_SK_REUSEPORT] = "sk_reuseport", 61 [BPF_PROG_TYPE_FLOW_DISSECTOR] = "flow_dissector", 62 [BPF_PROG_TYPE_CGROUP_SYSCTL] = "cgroup_sysctl", 63 [BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE] = "raw_tracepoint_writable", 64 [BPF_PROG_TYPE_CGROUP_SOCKOPT] = "cgroup_sockopt", 65 [BPF_PROG_TYPE_TRACING] = "tracing", 66 [BPF_PROG_TYPE_STRUCT_OPS] = "struct_ops", 67 [BPF_PROG_TYPE_EXT] = "ext", 68 [BPF_PROG_TYPE_LSM] = "lsm", 69 [BPF_PROG_TYPE_SK_LOOKUP] = "sk_lookup", 70 }; 71 72 const size_t prog_type_name_size = ARRAY_SIZE(prog_type_name); 73 74 enum dump_mode { 75 DUMP_JITED, 76 DUMP_XLATED, 77 }; 78 79 static const char * const attach_type_strings[] = { 80 [BPF_SK_SKB_STREAM_PARSER] = "stream_parser", 81 [BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict", 82 [BPF_SK_SKB_VERDICT] = "skb_verdict", 83 [BPF_SK_MSG_VERDICT] = "msg_verdict", 84 [BPF_FLOW_DISSECTOR] = "flow_dissector", 85 [__MAX_BPF_ATTACH_TYPE] = NULL, 86 }; 87 88 static struct hashmap *prog_table; 89 90 static enum bpf_attach_type parse_attach_type(const char *str) 91 { 92 enum bpf_attach_type type; 93 94 for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) { 95 if (attach_type_strings[type] && 96 is_prefix(str, attach_type_strings[type])) 97 return type; 98 } 99 100 return __MAX_BPF_ATTACH_TYPE; 101 } 102 103 static int prep_prog_info(struct bpf_prog_info *const info, enum dump_mode mode, 104 void **info_data, size_t *const info_data_sz) 105 { 106 struct bpf_prog_info holder = {}; 107 size_t needed = 0; 108 void *ptr; 109 110 if (mode == DUMP_JITED) { 111 holder.jited_prog_len = info->jited_prog_len; 112 needed += info->jited_prog_len; 113 } else { 114 holder.xlated_prog_len = info->xlated_prog_len; 115 needed += info->xlated_prog_len; 116 } 117 118 holder.nr_jited_ksyms = info->nr_jited_ksyms; 119 needed += info->nr_jited_ksyms * sizeof(__u64); 120 121 holder.nr_jited_func_lens = info->nr_jited_func_lens; 122 needed += info->nr_jited_func_lens * sizeof(__u32); 123 124 holder.nr_func_info = info->nr_func_info; 125 holder.func_info_rec_size = info->func_info_rec_size; 126 needed += info->nr_func_info * info->func_info_rec_size; 127 128 holder.nr_line_info = info->nr_line_info; 129 holder.line_info_rec_size = info->line_info_rec_size; 130 needed += info->nr_line_info * info->line_info_rec_size; 131 132 holder.nr_jited_line_info = info->nr_jited_line_info; 133 holder.jited_line_info_rec_size = info->jited_line_info_rec_size; 134 needed += info->nr_jited_line_info * info->jited_line_info_rec_size; 135 136 if (needed > *info_data_sz) { 137 ptr = realloc(*info_data, needed); 138 if (!ptr) 139 return -1; 140 141 *info_data = ptr; 142 *info_data_sz = needed; 143 } 144 ptr = *info_data; 145 146 if (mode == DUMP_JITED) { 147 holder.jited_prog_insns = ptr_to_u64(ptr); 148 ptr += holder.jited_prog_len; 149 } else { 150 holder.xlated_prog_insns = ptr_to_u64(ptr); 151 ptr += holder.xlated_prog_len; 152 } 153 154 holder.jited_ksyms = ptr_to_u64(ptr); 155 ptr += holder.nr_jited_ksyms * sizeof(__u64); 156 157 holder.jited_func_lens = ptr_to_u64(ptr); 158 ptr += holder.nr_jited_func_lens * sizeof(__u32); 159 160 holder.func_info = ptr_to_u64(ptr); 161 ptr += holder.nr_func_info * holder.func_info_rec_size; 162 163 holder.line_info = ptr_to_u64(ptr); 164 ptr += holder.nr_line_info * holder.line_info_rec_size; 165 166 holder.jited_line_info = ptr_to_u64(ptr); 167 ptr += holder.nr_jited_line_info * holder.jited_line_info_rec_size; 168 169 *info = holder; 170 return 0; 171 } 172 173 static void print_boot_time(__u64 nsecs, char *buf, unsigned int size) 174 { 175 struct timespec real_time_ts, boot_time_ts; 176 time_t wallclock_secs; 177 struct tm load_tm; 178 179 buf[--size] = '\0'; 180 181 if (clock_gettime(CLOCK_REALTIME, &real_time_ts) || 182 clock_gettime(CLOCK_BOOTTIME, &boot_time_ts)) { 183 perror("Can't read clocks"); 184 snprintf(buf, size, "%llu", nsecs / 1000000000); 185 return; 186 } 187 188 wallclock_secs = (real_time_ts.tv_sec - boot_time_ts.tv_sec) + 189 (real_time_ts.tv_nsec - boot_time_ts.tv_nsec + nsecs) / 190 1000000000; 191 192 193 if (!localtime_r(&wallclock_secs, &load_tm)) { 194 snprintf(buf, size, "%llu", nsecs / 1000000000); 195 return; 196 } 197 198 if (json_output) 199 strftime(buf, size, "%s", &load_tm); 200 else 201 strftime(buf, size, "%FT%T%z", &load_tm); 202 } 203 204 static void show_prog_maps(int fd, __u32 num_maps) 205 { 206 struct bpf_prog_info info = {}; 207 __u32 len = sizeof(info); 208 __u32 map_ids[num_maps]; 209 unsigned int i; 210 int err; 211 212 info.nr_map_ids = num_maps; 213 info.map_ids = ptr_to_u64(map_ids); 214 215 err = bpf_obj_get_info_by_fd(fd, &info, &len); 216 if (err || !info.nr_map_ids) 217 return; 218 219 if (json_output) { 220 jsonw_name(json_wtr, "map_ids"); 221 jsonw_start_array(json_wtr); 222 for (i = 0; i < info.nr_map_ids; i++) 223 jsonw_uint(json_wtr, map_ids[i]); 224 jsonw_end_array(json_wtr); 225 } else { 226 printf(" map_ids "); 227 for (i = 0; i < info.nr_map_ids; i++) 228 printf("%u%s", map_ids[i], 229 i == info.nr_map_ids - 1 ? "" : ","); 230 } 231 } 232 233 static void *find_metadata(int prog_fd, struct bpf_map_info *map_info) 234 { 235 struct bpf_prog_info prog_info; 236 __u32 prog_info_len; 237 __u32 map_info_len; 238 void *value = NULL; 239 __u32 *map_ids; 240 int nr_maps; 241 int key = 0; 242 int map_fd; 243 int ret; 244 __u32 i; 245 246 memset(&prog_info, 0, sizeof(prog_info)); 247 prog_info_len = sizeof(prog_info); 248 ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len); 249 if (ret) 250 return NULL; 251 252 if (!prog_info.nr_map_ids) 253 return NULL; 254 255 map_ids = calloc(prog_info.nr_map_ids, sizeof(__u32)); 256 if (!map_ids) 257 return NULL; 258 259 nr_maps = prog_info.nr_map_ids; 260 memset(&prog_info, 0, sizeof(prog_info)); 261 prog_info.nr_map_ids = nr_maps; 262 prog_info.map_ids = ptr_to_u64(map_ids); 263 prog_info_len = sizeof(prog_info); 264 265 ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len); 266 if (ret) 267 goto free_map_ids; 268 269 for (i = 0; i < prog_info.nr_map_ids; i++) { 270 map_fd = bpf_map_get_fd_by_id(map_ids[i]); 271 if (map_fd < 0) 272 goto free_map_ids; 273 274 memset(map_info, 0, sizeof(*map_info)); 275 map_info_len = sizeof(*map_info); 276 ret = bpf_obj_get_info_by_fd(map_fd, map_info, &map_info_len); 277 if (ret < 0) { 278 close(map_fd); 279 goto free_map_ids; 280 } 281 282 if (map_info->type != BPF_MAP_TYPE_ARRAY || 283 map_info->key_size != sizeof(int) || 284 map_info->max_entries != 1 || 285 !map_info->btf_value_type_id || 286 !strstr(map_info->name, ".rodata")) { 287 close(map_fd); 288 continue; 289 } 290 291 value = malloc(map_info->value_size); 292 if (!value) { 293 close(map_fd); 294 goto free_map_ids; 295 } 296 297 if (bpf_map_lookup_elem(map_fd, &key, value)) { 298 close(map_fd); 299 free(value); 300 value = NULL; 301 goto free_map_ids; 302 } 303 304 close(map_fd); 305 break; 306 } 307 308 free_map_ids: 309 free(map_ids); 310 return value; 311 } 312 313 static bool has_metadata_prefix(const char *s) 314 { 315 return strncmp(s, BPF_METADATA_PREFIX, BPF_METADATA_PREFIX_LEN) == 0; 316 } 317 318 static void show_prog_metadata(int fd, __u32 num_maps) 319 { 320 const struct btf_type *t_datasec, *t_var; 321 struct bpf_map_info map_info; 322 struct btf_var_secinfo *vsi; 323 bool printed_header = false; 324 unsigned int i, vlen; 325 void *value = NULL; 326 const char *name; 327 struct btf *btf; 328 int err; 329 330 if (!num_maps) 331 return; 332 333 memset(&map_info, 0, sizeof(map_info)); 334 value = find_metadata(fd, &map_info); 335 if (!value) 336 return; 337 338 btf = btf__load_from_kernel_by_id(map_info.btf_id); 339 if (libbpf_get_error(btf)) 340 goto out_free; 341 342 t_datasec = btf__type_by_id(btf, map_info.btf_value_type_id); 343 if (!btf_is_datasec(t_datasec)) 344 goto out_free; 345 346 vlen = btf_vlen(t_datasec); 347 vsi = btf_var_secinfos(t_datasec); 348 349 /* We don't proceed to check the kinds of the elements of the DATASEC. 350 * The verifier enforces them to be BTF_KIND_VAR. 351 */ 352 353 if (json_output) { 354 struct btf_dumper d = { 355 .btf = btf, 356 .jw = json_wtr, 357 .is_plain_text = false, 358 }; 359 360 for (i = 0; i < vlen; i++, vsi++) { 361 t_var = btf__type_by_id(btf, vsi->type); 362 name = btf__name_by_offset(btf, t_var->name_off); 363 364 if (!has_metadata_prefix(name)) 365 continue; 366 367 if (!printed_header) { 368 jsonw_name(json_wtr, "metadata"); 369 jsonw_start_object(json_wtr); 370 printed_header = true; 371 } 372 373 jsonw_name(json_wtr, name + BPF_METADATA_PREFIX_LEN); 374 err = btf_dumper_type(&d, t_var->type, value + vsi->offset); 375 if (err) { 376 p_err("btf dump failed: %d", err); 377 break; 378 } 379 } 380 if (printed_header) 381 jsonw_end_object(json_wtr); 382 } else { 383 json_writer_t *btf_wtr; 384 struct btf_dumper d = { 385 .btf = btf, 386 .is_plain_text = true, 387 }; 388 389 for (i = 0; i < vlen; i++, vsi++) { 390 t_var = btf__type_by_id(btf, vsi->type); 391 name = btf__name_by_offset(btf, t_var->name_off); 392 393 if (!has_metadata_prefix(name)) 394 continue; 395 396 if (!printed_header) { 397 printf("\tmetadata:"); 398 399 btf_wtr = jsonw_new(stdout); 400 if (!btf_wtr) { 401 p_err("jsonw alloc failed"); 402 goto out_free; 403 } 404 d.jw = btf_wtr, 405 406 printed_header = true; 407 } 408 409 printf("\n\t\t%s = ", name + BPF_METADATA_PREFIX_LEN); 410 411 jsonw_reset(btf_wtr); 412 err = btf_dumper_type(&d, t_var->type, value + vsi->offset); 413 if (err) { 414 p_err("btf dump failed: %d", err); 415 break; 416 } 417 } 418 if (printed_header) 419 jsonw_destroy(&btf_wtr); 420 } 421 422 out_free: 423 btf__free(btf); 424 free(value); 425 } 426 427 static void print_prog_header_json(struct bpf_prog_info *info, int fd) 428 { 429 char prog_name[MAX_PROG_FULL_NAME]; 430 431 jsonw_uint_field(json_wtr, "id", info->id); 432 if (info->type < ARRAY_SIZE(prog_type_name)) 433 jsonw_string_field(json_wtr, "type", 434 prog_type_name[info->type]); 435 else 436 jsonw_uint_field(json_wtr, "type", info->type); 437 438 if (*info->name) { 439 get_prog_full_name(info, fd, prog_name, sizeof(prog_name)); 440 jsonw_string_field(json_wtr, "name", prog_name); 441 } 442 443 jsonw_name(json_wtr, "tag"); 444 jsonw_printf(json_wtr, "\"" BPF_TAG_FMT "\"", 445 info->tag[0], info->tag[1], info->tag[2], info->tag[3], 446 info->tag[4], info->tag[5], info->tag[6], info->tag[7]); 447 448 jsonw_bool_field(json_wtr, "gpl_compatible", info->gpl_compatible); 449 if (info->run_time_ns) { 450 jsonw_uint_field(json_wtr, "run_time_ns", info->run_time_ns); 451 jsonw_uint_field(json_wtr, "run_cnt", info->run_cnt); 452 } 453 if (info->recursion_misses) 454 jsonw_uint_field(json_wtr, "recursion_misses", info->recursion_misses); 455 } 456 457 static void print_prog_json(struct bpf_prog_info *info, int fd) 458 { 459 char *memlock; 460 461 jsonw_start_object(json_wtr); 462 print_prog_header_json(info, fd); 463 print_dev_json(info->ifindex, info->netns_dev, info->netns_ino); 464 465 if (info->load_time) { 466 char buf[32]; 467 468 print_boot_time(info->load_time, buf, sizeof(buf)); 469 470 /* Piggy back on load_time, since 0 uid is a valid one */ 471 jsonw_name(json_wtr, "loaded_at"); 472 jsonw_printf(json_wtr, "%s", buf); 473 jsonw_uint_field(json_wtr, "uid", info->created_by_uid); 474 } 475 476 jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len); 477 478 if (info->jited_prog_len) { 479 jsonw_bool_field(json_wtr, "jited", true); 480 jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len); 481 } else { 482 jsonw_bool_field(json_wtr, "jited", false); 483 } 484 485 memlock = get_fdinfo(fd, "memlock"); 486 if (memlock) 487 jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock)); 488 free(memlock); 489 490 if (info->nr_map_ids) 491 show_prog_maps(fd, info->nr_map_ids); 492 493 if (info->btf_id) 494 jsonw_int_field(json_wtr, "btf_id", info->btf_id); 495 496 if (!hashmap__empty(prog_table)) { 497 struct hashmap_entry *entry; 498 499 jsonw_name(json_wtr, "pinned"); 500 jsonw_start_array(json_wtr); 501 hashmap__for_each_key_entry(prog_table, entry, 502 u32_as_hash_field(info->id)) 503 jsonw_string(json_wtr, entry->value); 504 jsonw_end_array(json_wtr); 505 } 506 507 emit_obj_refs_json(refs_table, info->id, json_wtr); 508 509 show_prog_metadata(fd, info->nr_map_ids); 510 511 jsonw_end_object(json_wtr); 512 } 513 514 static void print_prog_header_plain(struct bpf_prog_info *info, int fd) 515 { 516 char prog_name[MAX_PROG_FULL_NAME]; 517 518 printf("%u: ", info->id); 519 if (info->type < ARRAY_SIZE(prog_type_name)) 520 printf("%s ", prog_type_name[info->type]); 521 else 522 printf("type %u ", info->type); 523 524 if (*info->name) { 525 get_prog_full_name(info, fd, prog_name, sizeof(prog_name)); 526 printf("name %s ", prog_name); 527 } 528 529 printf("tag "); 530 fprint_hex(stdout, info->tag, BPF_TAG_SIZE, ""); 531 print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino); 532 printf("%s", info->gpl_compatible ? " gpl" : ""); 533 if (info->run_time_ns) 534 printf(" run_time_ns %lld run_cnt %lld", 535 info->run_time_ns, info->run_cnt); 536 if (info->recursion_misses) 537 printf(" recursion_misses %lld", info->recursion_misses); 538 printf("\n"); 539 } 540 541 static void print_prog_plain(struct bpf_prog_info *info, int fd) 542 { 543 char *memlock; 544 545 print_prog_header_plain(info, fd); 546 547 if (info->load_time) { 548 char buf[32]; 549 550 print_boot_time(info->load_time, buf, sizeof(buf)); 551 552 /* Piggy back on load_time, since 0 uid is a valid one */ 553 printf("\tloaded_at %s uid %u\n", buf, info->created_by_uid); 554 } 555 556 printf("\txlated %uB", info->xlated_prog_len); 557 558 if (info->jited_prog_len) 559 printf(" jited %uB", info->jited_prog_len); 560 else 561 printf(" not jited"); 562 563 memlock = get_fdinfo(fd, "memlock"); 564 if (memlock) 565 printf(" memlock %sB", memlock); 566 free(memlock); 567 568 if (info->nr_map_ids) 569 show_prog_maps(fd, info->nr_map_ids); 570 571 if (!hashmap__empty(prog_table)) { 572 struct hashmap_entry *entry; 573 574 hashmap__for_each_key_entry(prog_table, entry, 575 u32_as_hash_field(info->id)) 576 printf("\n\tpinned %s", (char *)entry->value); 577 } 578 579 if (info->btf_id) 580 printf("\n\tbtf_id %d", info->btf_id); 581 582 emit_obj_refs_plain(refs_table, info->id, "\n\tpids "); 583 584 printf("\n"); 585 586 show_prog_metadata(fd, info->nr_map_ids); 587 } 588 589 static int show_prog(int fd) 590 { 591 struct bpf_prog_info info = {}; 592 __u32 len = sizeof(info); 593 int err; 594 595 err = bpf_obj_get_info_by_fd(fd, &info, &len); 596 if (err) { 597 p_err("can't get prog info: %s", strerror(errno)); 598 return -1; 599 } 600 601 if (json_output) 602 print_prog_json(&info, fd); 603 else 604 print_prog_plain(&info, fd); 605 606 return 0; 607 } 608 609 static int do_show_subset(int argc, char **argv) 610 { 611 int *fds = NULL; 612 int nb_fds, i; 613 int err = -1; 614 615 fds = malloc(sizeof(int)); 616 if (!fds) { 617 p_err("mem alloc failed"); 618 return -1; 619 } 620 nb_fds = prog_parse_fds(&argc, &argv, &fds); 621 if (nb_fds < 1) 622 goto exit_free; 623 624 if (json_output && nb_fds > 1) 625 jsonw_start_array(json_wtr); /* root array */ 626 for (i = 0; i < nb_fds; i++) { 627 err = show_prog(fds[i]); 628 if (err) { 629 for (; i < nb_fds; i++) 630 close(fds[i]); 631 break; 632 } 633 close(fds[i]); 634 } 635 if (json_output && nb_fds > 1) 636 jsonw_end_array(json_wtr); /* root array */ 637 638 exit_free: 639 free(fds); 640 return err; 641 } 642 643 static int do_show(int argc, char **argv) 644 { 645 __u32 id = 0; 646 int err; 647 int fd; 648 649 if (show_pinned) { 650 prog_table = hashmap__new(hash_fn_for_key_as_id, 651 equal_fn_for_key_as_id, NULL); 652 if (IS_ERR(prog_table)) { 653 p_err("failed to create hashmap for pinned paths"); 654 return -1; 655 } 656 build_pinned_obj_table(prog_table, BPF_OBJ_PROG); 657 } 658 build_obj_refs_table(&refs_table, BPF_OBJ_PROG); 659 660 if (argc == 2) 661 return do_show_subset(argc, argv); 662 663 if (argc) 664 return BAD_ARG(); 665 666 if (json_output) 667 jsonw_start_array(json_wtr); 668 while (true) { 669 err = bpf_prog_get_next_id(id, &id); 670 if (err) { 671 if (errno == ENOENT) { 672 err = 0; 673 break; 674 } 675 p_err("can't get next program: %s%s", strerror(errno), 676 errno == EINVAL ? " -- kernel too old?" : ""); 677 err = -1; 678 break; 679 } 680 681 fd = bpf_prog_get_fd_by_id(id); 682 if (fd < 0) { 683 if (errno == ENOENT) 684 continue; 685 p_err("can't get prog by id (%u): %s", 686 id, strerror(errno)); 687 err = -1; 688 break; 689 } 690 691 err = show_prog(fd); 692 close(fd); 693 if (err) 694 break; 695 } 696 697 if (json_output) 698 jsonw_end_array(json_wtr); 699 700 delete_obj_refs_table(refs_table); 701 702 if (show_pinned) 703 delete_pinned_obj_table(prog_table); 704 705 return err; 706 } 707 708 static int 709 prog_dump(struct bpf_prog_info *info, enum dump_mode mode, 710 char *filepath, bool opcodes, bool visual, bool linum) 711 { 712 struct bpf_prog_linfo *prog_linfo = NULL; 713 const char *disasm_opt = NULL; 714 struct dump_data dd = {}; 715 void *func_info = NULL; 716 struct btf *btf = NULL; 717 char func_sig[1024]; 718 unsigned char *buf; 719 __u32 member_len; 720 int fd, err = -1; 721 ssize_t n; 722 723 if (mode == DUMP_JITED) { 724 if (info->jited_prog_len == 0 || !info->jited_prog_insns) { 725 p_info("no instructions returned"); 726 return -1; 727 } 728 buf = u64_to_ptr(info->jited_prog_insns); 729 member_len = info->jited_prog_len; 730 } else { /* DUMP_XLATED */ 731 if (info->xlated_prog_len == 0 || !info->xlated_prog_insns) { 732 p_err("error retrieving insn dump: kernel.kptr_restrict set?"); 733 return -1; 734 } 735 buf = u64_to_ptr(info->xlated_prog_insns); 736 member_len = info->xlated_prog_len; 737 } 738 739 if (info->btf_id) { 740 btf = btf__load_from_kernel_by_id(info->btf_id); 741 if (libbpf_get_error(btf)) { 742 p_err("failed to get btf"); 743 return -1; 744 } 745 } 746 747 func_info = u64_to_ptr(info->func_info); 748 749 if (info->nr_line_info) { 750 prog_linfo = bpf_prog_linfo__new(info); 751 if (!prog_linfo) 752 p_info("error in processing bpf_line_info. continue without it."); 753 } 754 755 if (filepath) { 756 fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600); 757 if (fd < 0) { 758 p_err("can't open file %s: %s", filepath, 759 strerror(errno)); 760 goto exit_free; 761 } 762 763 n = write(fd, buf, member_len); 764 close(fd); 765 if (n != (ssize_t)member_len) { 766 p_err("error writing output file: %s", 767 n < 0 ? strerror(errno) : "short write"); 768 goto exit_free; 769 } 770 771 if (json_output) 772 jsonw_null(json_wtr); 773 } else if (mode == DUMP_JITED) { 774 const char *name = NULL; 775 776 if (info->ifindex) { 777 name = ifindex_to_bfd_params(info->ifindex, 778 info->netns_dev, 779 info->netns_ino, 780 &disasm_opt); 781 if (!name) 782 goto exit_free; 783 } 784 785 if (info->nr_jited_func_lens && info->jited_func_lens) { 786 struct kernel_sym *sym = NULL; 787 struct bpf_func_info *record; 788 char sym_name[SYM_MAX_NAME]; 789 unsigned char *img = buf; 790 __u64 *ksyms = NULL; 791 __u32 *lens; 792 __u32 i; 793 if (info->nr_jited_ksyms) { 794 kernel_syms_load(&dd); 795 ksyms = u64_to_ptr(info->jited_ksyms); 796 } 797 798 if (json_output) 799 jsonw_start_array(json_wtr); 800 801 lens = u64_to_ptr(info->jited_func_lens); 802 for (i = 0; i < info->nr_jited_func_lens; i++) { 803 if (ksyms) { 804 sym = kernel_syms_search(&dd, ksyms[i]); 805 if (sym) 806 sprintf(sym_name, "%s", sym->name); 807 else 808 sprintf(sym_name, "0x%016llx", ksyms[i]); 809 } else { 810 strcpy(sym_name, "unknown"); 811 } 812 813 if (func_info) { 814 record = func_info + i * info->func_info_rec_size; 815 btf_dumper_type_only(btf, record->type_id, 816 func_sig, 817 sizeof(func_sig)); 818 } 819 820 if (json_output) { 821 jsonw_start_object(json_wtr); 822 if (func_info && func_sig[0] != '\0') { 823 jsonw_name(json_wtr, "proto"); 824 jsonw_string(json_wtr, func_sig); 825 } 826 jsonw_name(json_wtr, "name"); 827 jsonw_string(json_wtr, sym_name); 828 jsonw_name(json_wtr, "insns"); 829 } else { 830 if (func_info && func_sig[0] != '\0') 831 printf("%s:\n", func_sig); 832 printf("%s:\n", sym_name); 833 } 834 835 disasm_print_insn(img, lens[i], opcodes, 836 name, disasm_opt, btf, 837 prog_linfo, ksyms[i], i, 838 linum); 839 840 img += lens[i]; 841 842 if (json_output) 843 jsonw_end_object(json_wtr); 844 else 845 printf("\n"); 846 } 847 848 if (json_output) 849 jsonw_end_array(json_wtr); 850 } else { 851 disasm_print_insn(buf, member_len, opcodes, name, 852 disasm_opt, btf, NULL, 0, 0, false); 853 } 854 } else if (visual) { 855 if (json_output) 856 jsonw_null(json_wtr); 857 else 858 dump_xlated_cfg(buf, member_len); 859 } else { 860 kernel_syms_load(&dd); 861 dd.nr_jited_ksyms = info->nr_jited_ksyms; 862 dd.jited_ksyms = u64_to_ptr(info->jited_ksyms); 863 dd.btf = btf; 864 dd.func_info = func_info; 865 dd.finfo_rec_size = info->func_info_rec_size; 866 dd.prog_linfo = prog_linfo; 867 868 if (json_output) 869 dump_xlated_json(&dd, buf, member_len, opcodes, 870 linum); 871 else 872 dump_xlated_plain(&dd, buf, member_len, opcodes, 873 linum); 874 kernel_syms_destroy(&dd); 875 } 876 877 err = 0; 878 879 exit_free: 880 btf__free(btf); 881 bpf_prog_linfo__free(prog_linfo); 882 return err; 883 } 884 885 static int do_dump(int argc, char **argv) 886 { 887 struct bpf_prog_info info; 888 __u32 info_len = sizeof(info); 889 size_t info_data_sz = 0; 890 void *info_data = NULL; 891 char *filepath = NULL; 892 bool opcodes = false; 893 bool visual = false; 894 enum dump_mode mode; 895 bool linum = false; 896 int nb_fds, i = 0; 897 int *fds = NULL; 898 int err = -1; 899 900 if (is_prefix(*argv, "jited")) { 901 if (disasm_init()) 902 return -1; 903 mode = DUMP_JITED; 904 } else if (is_prefix(*argv, "xlated")) { 905 mode = DUMP_XLATED; 906 } else { 907 p_err("expected 'xlated' or 'jited', got: %s", *argv); 908 return -1; 909 } 910 NEXT_ARG(); 911 912 if (argc < 2) 913 usage(); 914 915 fds = malloc(sizeof(int)); 916 if (!fds) { 917 p_err("mem alloc failed"); 918 return -1; 919 } 920 nb_fds = prog_parse_fds(&argc, &argv, &fds); 921 if (nb_fds < 1) 922 goto exit_free; 923 924 if (is_prefix(*argv, "file")) { 925 NEXT_ARG(); 926 if (!argc) { 927 p_err("expected file path"); 928 goto exit_close; 929 } 930 if (nb_fds > 1) { 931 p_err("several programs matched"); 932 goto exit_close; 933 } 934 935 filepath = *argv; 936 NEXT_ARG(); 937 } else if (is_prefix(*argv, "opcodes")) { 938 opcodes = true; 939 NEXT_ARG(); 940 } else if (is_prefix(*argv, "visual")) { 941 if (nb_fds > 1) { 942 p_err("several programs matched"); 943 goto exit_close; 944 } 945 946 visual = true; 947 NEXT_ARG(); 948 } else if (is_prefix(*argv, "linum")) { 949 linum = true; 950 NEXT_ARG(); 951 } 952 953 if (argc) { 954 usage(); 955 goto exit_close; 956 } 957 958 if (json_output && nb_fds > 1) 959 jsonw_start_array(json_wtr); /* root array */ 960 for (i = 0; i < nb_fds; i++) { 961 memset(&info, 0, sizeof(info)); 962 963 err = bpf_obj_get_info_by_fd(fds[i], &info, &info_len); 964 if (err) { 965 p_err("can't get prog info: %s", strerror(errno)); 966 break; 967 } 968 969 err = prep_prog_info(&info, mode, &info_data, &info_data_sz); 970 if (err) { 971 p_err("can't grow prog info_data"); 972 break; 973 } 974 975 err = bpf_obj_get_info_by_fd(fds[i], &info, &info_len); 976 if (err) { 977 p_err("can't get prog info: %s", strerror(errno)); 978 break; 979 } 980 981 if (json_output && nb_fds > 1) { 982 jsonw_start_object(json_wtr); /* prog object */ 983 print_prog_header_json(&info, fds[i]); 984 jsonw_name(json_wtr, "insns"); 985 } else if (nb_fds > 1) { 986 print_prog_header_plain(&info, fds[i]); 987 } 988 989 err = prog_dump(&info, mode, filepath, opcodes, visual, linum); 990 991 if (json_output && nb_fds > 1) 992 jsonw_end_object(json_wtr); /* prog object */ 993 else if (i != nb_fds - 1 && nb_fds > 1) 994 printf("\n"); 995 996 if (err) 997 break; 998 close(fds[i]); 999 } 1000 if (json_output && nb_fds > 1) 1001 jsonw_end_array(json_wtr); /* root array */ 1002 1003 exit_close: 1004 for (; i < nb_fds; i++) 1005 close(fds[i]); 1006 exit_free: 1007 free(info_data); 1008 free(fds); 1009 return err; 1010 } 1011 1012 static int do_pin(int argc, char **argv) 1013 { 1014 int err; 1015 1016 err = do_pin_any(argc, argv, prog_parse_fd); 1017 if (!err && json_output) 1018 jsonw_null(json_wtr); 1019 return err; 1020 } 1021 1022 struct map_replace { 1023 int idx; 1024 int fd; 1025 char *name; 1026 }; 1027 1028 static int map_replace_compar(const void *p1, const void *p2) 1029 { 1030 const struct map_replace *a = p1, *b = p2; 1031 1032 return a->idx - b->idx; 1033 } 1034 1035 static int parse_attach_detach_args(int argc, char **argv, int *progfd, 1036 enum bpf_attach_type *attach_type, 1037 int *mapfd) 1038 { 1039 if (!REQ_ARGS(3)) 1040 return -EINVAL; 1041 1042 *progfd = prog_parse_fd(&argc, &argv); 1043 if (*progfd < 0) 1044 return *progfd; 1045 1046 *attach_type = parse_attach_type(*argv); 1047 if (*attach_type == __MAX_BPF_ATTACH_TYPE) { 1048 p_err("invalid attach/detach type"); 1049 return -EINVAL; 1050 } 1051 1052 if (*attach_type == BPF_FLOW_DISSECTOR) { 1053 *mapfd = 0; 1054 return 0; 1055 } 1056 1057 NEXT_ARG(); 1058 if (!REQ_ARGS(2)) 1059 return -EINVAL; 1060 1061 *mapfd = map_parse_fd(&argc, &argv); 1062 if (*mapfd < 0) 1063 return *mapfd; 1064 1065 return 0; 1066 } 1067 1068 static int do_attach(int argc, char **argv) 1069 { 1070 enum bpf_attach_type attach_type; 1071 int err, progfd; 1072 int mapfd; 1073 1074 err = parse_attach_detach_args(argc, argv, 1075 &progfd, &attach_type, &mapfd); 1076 if (err) 1077 return err; 1078 1079 err = bpf_prog_attach(progfd, mapfd, attach_type, 0); 1080 if (err) { 1081 p_err("failed prog attach to map"); 1082 return -EINVAL; 1083 } 1084 1085 if (json_output) 1086 jsonw_null(json_wtr); 1087 return 0; 1088 } 1089 1090 static int do_detach(int argc, char **argv) 1091 { 1092 enum bpf_attach_type attach_type; 1093 int err, progfd; 1094 int mapfd; 1095 1096 err = parse_attach_detach_args(argc, argv, 1097 &progfd, &attach_type, &mapfd); 1098 if (err) 1099 return err; 1100 1101 err = bpf_prog_detach2(progfd, mapfd, attach_type); 1102 if (err) { 1103 p_err("failed prog detach from map"); 1104 return -EINVAL; 1105 } 1106 1107 if (json_output) 1108 jsonw_null(json_wtr); 1109 return 0; 1110 } 1111 1112 static int check_single_stdin(char *file_data_in, char *file_ctx_in) 1113 { 1114 if (file_data_in && file_ctx_in && 1115 !strcmp(file_data_in, "-") && !strcmp(file_ctx_in, "-")) { 1116 p_err("cannot use standard input for both data_in and ctx_in"); 1117 return -1; 1118 } 1119 1120 return 0; 1121 } 1122 1123 static int get_run_data(const char *fname, void **data_ptr, unsigned int *size) 1124 { 1125 size_t block_size = 256; 1126 size_t buf_size = block_size; 1127 size_t nb_read = 0; 1128 void *tmp; 1129 FILE *f; 1130 1131 if (!fname) { 1132 *data_ptr = NULL; 1133 *size = 0; 1134 return 0; 1135 } 1136 1137 if (!strcmp(fname, "-")) 1138 f = stdin; 1139 else 1140 f = fopen(fname, "r"); 1141 if (!f) { 1142 p_err("failed to open %s: %s", fname, strerror(errno)); 1143 return -1; 1144 } 1145 1146 *data_ptr = malloc(block_size); 1147 if (!*data_ptr) { 1148 p_err("failed to allocate memory for data_in/ctx_in: %s", 1149 strerror(errno)); 1150 goto err_fclose; 1151 } 1152 1153 while ((nb_read += fread(*data_ptr + nb_read, 1, block_size, f))) { 1154 if (feof(f)) 1155 break; 1156 if (ferror(f)) { 1157 p_err("failed to read data_in/ctx_in from %s: %s", 1158 fname, strerror(errno)); 1159 goto err_free; 1160 } 1161 if (nb_read > buf_size - block_size) { 1162 if (buf_size == UINT32_MAX) { 1163 p_err("data_in/ctx_in is too long (max: %d)", 1164 UINT32_MAX); 1165 goto err_free; 1166 } 1167 /* No space for fread()-ing next chunk; realloc() */ 1168 buf_size *= 2; 1169 tmp = realloc(*data_ptr, buf_size); 1170 if (!tmp) { 1171 p_err("failed to reallocate data_in/ctx_in: %s", 1172 strerror(errno)); 1173 goto err_free; 1174 } 1175 *data_ptr = tmp; 1176 } 1177 } 1178 if (f != stdin) 1179 fclose(f); 1180 1181 *size = nb_read; 1182 return 0; 1183 1184 err_free: 1185 free(*data_ptr); 1186 *data_ptr = NULL; 1187 err_fclose: 1188 if (f != stdin) 1189 fclose(f); 1190 return -1; 1191 } 1192 1193 static void hex_print(void *data, unsigned int size, FILE *f) 1194 { 1195 size_t i, j; 1196 char c; 1197 1198 for (i = 0; i < size; i += 16) { 1199 /* Row offset */ 1200 fprintf(f, "%07zx\t", i); 1201 1202 /* Hexadecimal values */ 1203 for (j = i; j < i + 16 && j < size; j++) 1204 fprintf(f, "%02x%s", *(uint8_t *)(data + j), 1205 j % 2 ? " " : ""); 1206 for (; j < i + 16; j++) 1207 fprintf(f, " %s", j % 2 ? " " : ""); 1208 1209 /* ASCII values (if relevant), '.' otherwise */ 1210 fprintf(f, "| "); 1211 for (j = i; j < i + 16 && j < size; j++) { 1212 c = *(char *)(data + j); 1213 if (c < ' ' || c > '~') 1214 c = '.'; 1215 fprintf(f, "%c%s", c, j == i + 7 ? " " : ""); 1216 } 1217 1218 fprintf(f, "\n"); 1219 } 1220 } 1221 1222 static int 1223 print_run_output(void *data, unsigned int size, const char *fname, 1224 const char *json_key) 1225 { 1226 size_t nb_written; 1227 FILE *f; 1228 1229 if (!fname) 1230 return 0; 1231 1232 if (!strcmp(fname, "-")) { 1233 f = stdout; 1234 if (json_output) { 1235 jsonw_name(json_wtr, json_key); 1236 print_data_json(data, size); 1237 } else { 1238 hex_print(data, size, f); 1239 } 1240 return 0; 1241 } 1242 1243 f = fopen(fname, "w"); 1244 if (!f) { 1245 p_err("failed to open %s: %s", fname, strerror(errno)); 1246 return -1; 1247 } 1248 1249 nb_written = fwrite(data, 1, size, f); 1250 fclose(f); 1251 if (nb_written != size) { 1252 p_err("failed to write output data/ctx: %s", strerror(errno)); 1253 return -1; 1254 } 1255 1256 return 0; 1257 } 1258 1259 static int alloc_run_data(void **data_ptr, unsigned int size_out) 1260 { 1261 *data_ptr = calloc(size_out, 1); 1262 if (!*data_ptr) { 1263 p_err("failed to allocate memory for output data/ctx: %s", 1264 strerror(errno)); 1265 return -1; 1266 } 1267 1268 return 0; 1269 } 1270 1271 static int do_run(int argc, char **argv) 1272 { 1273 char *data_fname_in = NULL, *data_fname_out = NULL; 1274 char *ctx_fname_in = NULL, *ctx_fname_out = NULL; 1275 struct bpf_prog_test_run_attr test_attr = {0}; 1276 const unsigned int default_size = SZ_32K; 1277 void *data_in = NULL, *data_out = NULL; 1278 void *ctx_in = NULL, *ctx_out = NULL; 1279 unsigned int repeat = 1; 1280 int fd, err; 1281 1282 if (!REQ_ARGS(4)) 1283 return -1; 1284 1285 fd = prog_parse_fd(&argc, &argv); 1286 if (fd < 0) 1287 return -1; 1288 1289 while (argc) { 1290 if (detect_common_prefix(*argv, "data_in", "data_out", 1291 "data_size_out", NULL)) 1292 return -1; 1293 if (detect_common_prefix(*argv, "ctx_in", "ctx_out", 1294 "ctx_size_out", NULL)) 1295 return -1; 1296 1297 if (is_prefix(*argv, "data_in")) { 1298 NEXT_ARG(); 1299 if (!REQ_ARGS(1)) 1300 return -1; 1301 1302 data_fname_in = GET_ARG(); 1303 if (check_single_stdin(data_fname_in, ctx_fname_in)) 1304 return -1; 1305 } else if (is_prefix(*argv, "data_out")) { 1306 NEXT_ARG(); 1307 if (!REQ_ARGS(1)) 1308 return -1; 1309 1310 data_fname_out = GET_ARG(); 1311 } else if (is_prefix(*argv, "data_size_out")) { 1312 char *endptr; 1313 1314 NEXT_ARG(); 1315 if (!REQ_ARGS(1)) 1316 return -1; 1317 1318 test_attr.data_size_out = strtoul(*argv, &endptr, 0); 1319 if (*endptr) { 1320 p_err("can't parse %s as output data size", 1321 *argv); 1322 return -1; 1323 } 1324 NEXT_ARG(); 1325 } else if (is_prefix(*argv, "ctx_in")) { 1326 NEXT_ARG(); 1327 if (!REQ_ARGS(1)) 1328 return -1; 1329 1330 ctx_fname_in = GET_ARG(); 1331 if (check_single_stdin(data_fname_in, ctx_fname_in)) 1332 return -1; 1333 } else if (is_prefix(*argv, "ctx_out")) { 1334 NEXT_ARG(); 1335 if (!REQ_ARGS(1)) 1336 return -1; 1337 1338 ctx_fname_out = GET_ARG(); 1339 } else if (is_prefix(*argv, "ctx_size_out")) { 1340 char *endptr; 1341 1342 NEXT_ARG(); 1343 if (!REQ_ARGS(1)) 1344 return -1; 1345 1346 test_attr.ctx_size_out = strtoul(*argv, &endptr, 0); 1347 if (*endptr) { 1348 p_err("can't parse %s as output context size", 1349 *argv); 1350 return -1; 1351 } 1352 NEXT_ARG(); 1353 } else if (is_prefix(*argv, "repeat")) { 1354 char *endptr; 1355 1356 NEXT_ARG(); 1357 if (!REQ_ARGS(1)) 1358 return -1; 1359 1360 repeat = strtoul(*argv, &endptr, 0); 1361 if (*endptr) { 1362 p_err("can't parse %s as repeat number", 1363 *argv); 1364 return -1; 1365 } 1366 NEXT_ARG(); 1367 } else { 1368 p_err("expected no more arguments, 'data_in', 'data_out', 'data_size_out', 'ctx_in', 'ctx_out', 'ctx_size_out' or 'repeat', got: '%s'?", 1369 *argv); 1370 return -1; 1371 } 1372 } 1373 1374 err = get_run_data(data_fname_in, &data_in, &test_attr.data_size_in); 1375 if (err) 1376 return -1; 1377 1378 if (data_in) { 1379 if (!test_attr.data_size_out) 1380 test_attr.data_size_out = default_size; 1381 err = alloc_run_data(&data_out, test_attr.data_size_out); 1382 if (err) 1383 goto free_data_in; 1384 } 1385 1386 err = get_run_data(ctx_fname_in, &ctx_in, &test_attr.ctx_size_in); 1387 if (err) 1388 goto free_data_out; 1389 1390 if (ctx_in) { 1391 if (!test_attr.ctx_size_out) 1392 test_attr.ctx_size_out = default_size; 1393 err = alloc_run_data(&ctx_out, test_attr.ctx_size_out); 1394 if (err) 1395 goto free_ctx_in; 1396 } 1397 1398 test_attr.prog_fd = fd; 1399 test_attr.repeat = repeat; 1400 test_attr.data_in = data_in; 1401 test_attr.data_out = data_out; 1402 test_attr.ctx_in = ctx_in; 1403 test_attr.ctx_out = ctx_out; 1404 1405 err = bpf_prog_test_run_xattr(&test_attr); 1406 if (err) { 1407 p_err("failed to run program: %s", strerror(errno)); 1408 goto free_ctx_out; 1409 } 1410 1411 err = 0; 1412 1413 if (json_output) 1414 jsonw_start_object(json_wtr); /* root */ 1415 1416 /* Do not exit on errors occurring when printing output data/context, 1417 * we still want to print return value and duration for program run. 1418 */ 1419 if (test_attr.data_size_out) 1420 err += print_run_output(test_attr.data_out, 1421 test_attr.data_size_out, 1422 data_fname_out, "data_out"); 1423 if (test_attr.ctx_size_out) 1424 err += print_run_output(test_attr.ctx_out, 1425 test_attr.ctx_size_out, 1426 ctx_fname_out, "ctx_out"); 1427 1428 if (json_output) { 1429 jsonw_uint_field(json_wtr, "retval", test_attr.retval); 1430 jsonw_uint_field(json_wtr, "duration", test_attr.duration); 1431 jsonw_end_object(json_wtr); /* root */ 1432 } else { 1433 fprintf(stdout, "Return value: %u, duration%s: %uns\n", 1434 test_attr.retval, 1435 repeat > 1 ? " (average)" : "", test_attr.duration); 1436 } 1437 1438 free_ctx_out: 1439 free(ctx_out); 1440 free_ctx_in: 1441 free(ctx_in); 1442 free_data_out: 1443 free(data_out); 1444 free_data_in: 1445 free(data_in); 1446 1447 return err; 1448 } 1449 1450 static int 1451 get_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type, 1452 enum bpf_attach_type *expected_attach_type) 1453 { 1454 libbpf_print_fn_t print_backup; 1455 int ret; 1456 1457 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type); 1458 if (!ret) 1459 return ret; 1460 1461 /* libbpf_prog_type_by_name() failed, let's re-run with debug level */ 1462 print_backup = libbpf_set_print(print_all_levels); 1463 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type); 1464 libbpf_set_print(print_backup); 1465 1466 return ret; 1467 } 1468 1469 static int load_with_options(int argc, char **argv, bool first_prog_only) 1470 { 1471 enum bpf_prog_type common_prog_type = BPF_PROG_TYPE_UNSPEC; 1472 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts, 1473 .relaxed_maps = relaxed_maps, 1474 ); 1475 enum bpf_attach_type expected_attach_type; 1476 struct map_replace *map_replace = NULL; 1477 struct bpf_program *prog = NULL, *pos; 1478 unsigned int old_map_fds = 0; 1479 const char *pinmaps = NULL; 1480 struct bpf_object *obj; 1481 struct bpf_map *map; 1482 const char *pinfile; 1483 unsigned int i, j; 1484 __u32 ifindex = 0; 1485 const char *file; 1486 int idx, err; 1487 1488 1489 if (!REQ_ARGS(2)) 1490 return -1; 1491 file = GET_ARG(); 1492 pinfile = GET_ARG(); 1493 1494 while (argc) { 1495 if (is_prefix(*argv, "type")) { 1496 NEXT_ARG(); 1497 1498 if (common_prog_type != BPF_PROG_TYPE_UNSPEC) { 1499 p_err("program type already specified"); 1500 goto err_free_reuse_maps; 1501 } 1502 if (!REQ_ARGS(1)) 1503 goto err_free_reuse_maps; 1504 1505 err = libbpf_prog_type_by_name(*argv, &common_prog_type, 1506 &expected_attach_type); 1507 if (err < 0) { 1508 /* Put a '/' at the end of type to appease libbpf */ 1509 char *type = malloc(strlen(*argv) + 2); 1510 1511 if (!type) { 1512 p_err("mem alloc failed"); 1513 goto err_free_reuse_maps; 1514 } 1515 *type = 0; 1516 strcat(type, *argv); 1517 strcat(type, "/"); 1518 1519 err = get_prog_type_by_name(type, &common_prog_type, 1520 &expected_attach_type); 1521 free(type); 1522 if (err < 0) 1523 goto err_free_reuse_maps; 1524 } 1525 1526 NEXT_ARG(); 1527 } else if (is_prefix(*argv, "map")) { 1528 void *new_map_replace; 1529 char *endptr, *name; 1530 int fd; 1531 1532 NEXT_ARG(); 1533 1534 if (!REQ_ARGS(4)) 1535 goto err_free_reuse_maps; 1536 1537 if (is_prefix(*argv, "idx")) { 1538 NEXT_ARG(); 1539 1540 idx = strtoul(*argv, &endptr, 0); 1541 if (*endptr) { 1542 p_err("can't parse %s as IDX", *argv); 1543 goto err_free_reuse_maps; 1544 } 1545 name = NULL; 1546 } else if (is_prefix(*argv, "name")) { 1547 NEXT_ARG(); 1548 1549 name = *argv; 1550 idx = -1; 1551 } else { 1552 p_err("expected 'idx' or 'name', got: '%s'?", 1553 *argv); 1554 goto err_free_reuse_maps; 1555 } 1556 NEXT_ARG(); 1557 1558 fd = map_parse_fd(&argc, &argv); 1559 if (fd < 0) 1560 goto err_free_reuse_maps; 1561 1562 new_map_replace = reallocarray(map_replace, 1563 old_map_fds + 1, 1564 sizeof(*map_replace)); 1565 if (!new_map_replace) { 1566 p_err("mem alloc failed"); 1567 goto err_free_reuse_maps; 1568 } 1569 map_replace = new_map_replace; 1570 1571 map_replace[old_map_fds].idx = idx; 1572 map_replace[old_map_fds].name = name; 1573 map_replace[old_map_fds].fd = fd; 1574 old_map_fds++; 1575 } else if (is_prefix(*argv, "dev")) { 1576 NEXT_ARG(); 1577 1578 if (ifindex) { 1579 p_err("offload device already specified"); 1580 goto err_free_reuse_maps; 1581 } 1582 if (!REQ_ARGS(1)) 1583 goto err_free_reuse_maps; 1584 1585 ifindex = if_nametoindex(*argv); 1586 if (!ifindex) { 1587 p_err("unrecognized netdevice '%s': %s", 1588 *argv, strerror(errno)); 1589 goto err_free_reuse_maps; 1590 } 1591 NEXT_ARG(); 1592 } else if (is_prefix(*argv, "pinmaps")) { 1593 NEXT_ARG(); 1594 1595 if (!REQ_ARGS(1)) 1596 goto err_free_reuse_maps; 1597 1598 pinmaps = GET_ARG(); 1599 } else { 1600 p_err("expected no more arguments, 'type', 'map' or 'dev', got: '%s'?", 1601 *argv); 1602 goto err_free_reuse_maps; 1603 } 1604 } 1605 1606 set_max_rlimit(); 1607 1608 if (verifier_logs) 1609 /* log_level1 + log_level2 + stats, but not stable UAPI */ 1610 open_opts.kernel_log_level = 1 + 2 + 4; 1611 1612 obj = bpf_object__open_file(file, &open_opts); 1613 if (libbpf_get_error(obj)) { 1614 p_err("failed to open object file"); 1615 goto err_free_reuse_maps; 1616 } 1617 1618 bpf_object__for_each_program(pos, obj) { 1619 enum bpf_prog_type prog_type = common_prog_type; 1620 1621 if (prog_type == BPF_PROG_TYPE_UNSPEC) { 1622 const char *sec_name = bpf_program__section_name(pos); 1623 1624 err = get_prog_type_by_name(sec_name, &prog_type, 1625 &expected_attach_type); 1626 if (err < 0) 1627 goto err_close_obj; 1628 } 1629 1630 bpf_program__set_ifindex(pos, ifindex); 1631 bpf_program__set_type(pos, prog_type); 1632 bpf_program__set_expected_attach_type(pos, expected_attach_type); 1633 } 1634 1635 qsort(map_replace, old_map_fds, sizeof(*map_replace), 1636 map_replace_compar); 1637 1638 /* After the sort maps by name will be first on the list, because they 1639 * have idx == -1. Resolve them. 1640 */ 1641 j = 0; 1642 while (j < old_map_fds && map_replace[j].name) { 1643 i = 0; 1644 bpf_object__for_each_map(map, obj) { 1645 if (!strcmp(bpf_map__name(map), map_replace[j].name)) { 1646 map_replace[j].idx = i; 1647 break; 1648 } 1649 i++; 1650 } 1651 if (map_replace[j].idx == -1) { 1652 p_err("unable to find map '%s'", map_replace[j].name); 1653 goto err_close_obj; 1654 } 1655 j++; 1656 } 1657 /* Resort if any names were resolved */ 1658 if (j) 1659 qsort(map_replace, old_map_fds, sizeof(*map_replace), 1660 map_replace_compar); 1661 1662 /* Set ifindex and name reuse */ 1663 j = 0; 1664 idx = 0; 1665 bpf_object__for_each_map(map, obj) { 1666 if (bpf_map__type(map) != BPF_MAP_TYPE_PERF_EVENT_ARRAY) 1667 bpf_map__set_ifindex(map, ifindex); 1668 1669 if (j < old_map_fds && idx == map_replace[j].idx) { 1670 err = bpf_map__reuse_fd(map, map_replace[j++].fd); 1671 if (err) { 1672 p_err("unable to set up map reuse: %d", err); 1673 goto err_close_obj; 1674 } 1675 1676 /* Next reuse wants to apply to the same map */ 1677 if (j < old_map_fds && map_replace[j].idx == idx) { 1678 p_err("replacement for map idx %d specified more than once", 1679 idx); 1680 goto err_close_obj; 1681 } 1682 } 1683 1684 idx++; 1685 } 1686 if (j < old_map_fds) { 1687 p_err("map idx '%d' not used", map_replace[j].idx); 1688 goto err_close_obj; 1689 } 1690 1691 err = bpf_object__load(obj); 1692 if (err) { 1693 p_err("failed to load object file"); 1694 goto err_close_obj; 1695 } 1696 1697 err = mount_bpffs_for_pin(pinfile); 1698 if (err) 1699 goto err_close_obj; 1700 1701 if (first_prog_only) { 1702 prog = bpf_object__next_program(obj, NULL); 1703 if (!prog) { 1704 p_err("object file doesn't contain any bpf program"); 1705 goto err_close_obj; 1706 } 1707 1708 err = bpf_obj_pin(bpf_program__fd(prog), pinfile); 1709 if (err) { 1710 p_err("failed to pin program %s", 1711 bpf_program__section_name(prog)); 1712 goto err_close_obj; 1713 } 1714 } else { 1715 err = bpf_object__pin_programs(obj, pinfile); 1716 if (err) { 1717 p_err("failed to pin all programs"); 1718 goto err_close_obj; 1719 } 1720 } 1721 1722 if (pinmaps) { 1723 err = bpf_object__pin_maps(obj, pinmaps); 1724 if (err) { 1725 p_err("failed to pin all maps"); 1726 goto err_unpin; 1727 } 1728 } 1729 1730 if (json_output) 1731 jsonw_null(json_wtr); 1732 1733 bpf_object__close(obj); 1734 for (i = 0; i < old_map_fds; i++) 1735 close(map_replace[i].fd); 1736 free(map_replace); 1737 1738 return 0; 1739 1740 err_unpin: 1741 if (first_prog_only) 1742 unlink(pinfile); 1743 else 1744 bpf_object__unpin_programs(obj, pinfile); 1745 err_close_obj: 1746 if (!legacy_libbpf) { 1747 p_info("Warning: bpftool is now running in libbpf strict mode and has more stringent requirements about BPF programs.\n" 1748 "If it used to work for this object file but now doesn't, see --legacy option for more details.\n"); 1749 } 1750 1751 bpf_object__close(obj); 1752 err_free_reuse_maps: 1753 for (i = 0; i < old_map_fds; i++) 1754 close(map_replace[i].fd); 1755 free(map_replace); 1756 return -1; 1757 } 1758 1759 static int count_open_fds(void) 1760 { 1761 DIR *dp = opendir("/proc/self/fd"); 1762 struct dirent *de; 1763 int cnt = -3; 1764 1765 if (!dp) 1766 return -1; 1767 1768 while ((de = readdir(dp))) 1769 cnt++; 1770 1771 closedir(dp); 1772 return cnt; 1773 } 1774 1775 static int try_loader(struct gen_loader_opts *gen) 1776 { 1777 struct bpf_load_and_run_opts opts = {}; 1778 struct bpf_loader_ctx *ctx; 1779 int ctx_sz = sizeof(*ctx) + 64 * max(sizeof(struct bpf_map_desc), 1780 sizeof(struct bpf_prog_desc)); 1781 int log_buf_sz = (1u << 24) - 1; 1782 int err, fds_before, fd_delta; 1783 char *log_buf = NULL; 1784 1785 ctx = alloca(ctx_sz); 1786 memset(ctx, 0, ctx_sz); 1787 ctx->sz = ctx_sz; 1788 if (verifier_logs) { 1789 ctx->log_level = 1 + 2 + 4; 1790 ctx->log_size = log_buf_sz; 1791 log_buf = malloc(log_buf_sz); 1792 if (!log_buf) 1793 return -ENOMEM; 1794 ctx->log_buf = (long) log_buf; 1795 } 1796 opts.ctx = ctx; 1797 opts.data = gen->data; 1798 opts.data_sz = gen->data_sz; 1799 opts.insns = gen->insns; 1800 opts.insns_sz = gen->insns_sz; 1801 fds_before = count_open_fds(); 1802 err = bpf_load_and_run(&opts); 1803 fd_delta = count_open_fds() - fds_before; 1804 if (err < 0 || verifier_logs) { 1805 fprintf(stderr, "err %d\n%s\n%s", err, opts.errstr, log_buf); 1806 if (fd_delta && err < 0) 1807 fprintf(stderr, "loader prog leaked %d FDs\n", 1808 fd_delta); 1809 } 1810 free(log_buf); 1811 return err; 1812 } 1813 1814 static int do_loader(int argc, char **argv) 1815 { 1816 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts); 1817 DECLARE_LIBBPF_OPTS(gen_loader_opts, gen); 1818 struct bpf_object *obj; 1819 const char *file; 1820 int err = 0; 1821 1822 if (!REQ_ARGS(1)) 1823 return -1; 1824 file = GET_ARG(); 1825 1826 if (verifier_logs) 1827 /* log_level1 + log_level2 + stats, but not stable UAPI */ 1828 open_opts.kernel_log_level = 1 + 2 + 4; 1829 1830 obj = bpf_object__open_file(file, &open_opts); 1831 if (libbpf_get_error(obj)) { 1832 p_err("failed to open object file"); 1833 goto err_close_obj; 1834 } 1835 1836 err = bpf_object__gen_loader(obj, &gen); 1837 if (err) 1838 goto err_close_obj; 1839 1840 err = bpf_object__load(obj); 1841 if (err) { 1842 p_err("failed to load object file"); 1843 goto err_close_obj; 1844 } 1845 1846 if (verifier_logs) { 1847 struct dump_data dd = {}; 1848 1849 kernel_syms_load(&dd); 1850 dump_xlated_plain(&dd, (void *)gen.insns, gen.insns_sz, false, false); 1851 kernel_syms_destroy(&dd); 1852 } 1853 err = try_loader(&gen); 1854 err_close_obj: 1855 bpf_object__close(obj); 1856 return err; 1857 } 1858 1859 static int do_load(int argc, char **argv) 1860 { 1861 if (use_loader) 1862 return do_loader(argc, argv); 1863 return load_with_options(argc, argv, true); 1864 } 1865 1866 static int do_loadall(int argc, char **argv) 1867 { 1868 return load_with_options(argc, argv, false); 1869 } 1870 1871 #ifdef BPFTOOL_WITHOUT_SKELETONS 1872 1873 static int do_profile(int argc, char **argv) 1874 { 1875 p_err("bpftool prog profile command is not supported. Please build bpftool with clang >= 10.0.0"); 1876 return 0; 1877 } 1878 1879 #else /* BPFTOOL_WITHOUT_SKELETONS */ 1880 1881 #include "profiler.skel.h" 1882 1883 struct profile_metric { 1884 const char *name; 1885 struct bpf_perf_event_value val; 1886 struct perf_event_attr attr; 1887 bool selected; 1888 1889 /* calculate ratios like instructions per cycle */ 1890 const int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */ 1891 const char *ratio_desc; 1892 const float ratio_mul; 1893 } metrics[] = { 1894 { 1895 .name = "cycles", 1896 .attr = { 1897 .type = PERF_TYPE_HARDWARE, 1898 .config = PERF_COUNT_HW_CPU_CYCLES, 1899 .exclude_user = 1, 1900 }, 1901 }, 1902 { 1903 .name = "instructions", 1904 .attr = { 1905 .type = PERF_TYPE_HARDWARE, 1906 .config = PERF_COUNT_HW_INSTRUCTIONS, 1907 .exclude_user = 1, 1908 }, 1909 .ratio_metric = 1, 1910 .ratio_desc = "insns per cycle", 1911 .ratio_mul = 1.0, 1912 }, 1913 { 1914 .name = "l1d_loads", 1915 .attr = { 1916 .type = PERF_TYPE_HW_CACHE, 1917 .config = 1918 PERF_COUNT_HW_CACHE_L1D | 1919 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1920 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16), 1921 .exclude_user = 1, 1922 }, 1923 }, 1924 { 1925 .name = "llc_misses", 1926 .attr = { 1927 .type = PERF_TYPE_HW_CACHE, 1928 .config = 1929 PERF_COUNT_HW_CACHE_LL | 1930 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1931 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16), 1932 .exclude_user = 1 1933 }, 1934 .ratio_metric = 2, 1935 .ratio_desc = "LLC misses per million insns", 1936 .ratio_mul = 1e6, 1937 }, 1938 { 1939 .name = "itlb_misses", 1940 .attr = { 1941 .type = PERF_TYPE_HW_CACHE, 1942 .config = 1943 PERF_COUNT_HW_CACHE_ITLB | 1944 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1945 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16), 1946 .exclude_user = 1 1947 }, 1948 .ratio_metric = 2, 1949 .ratio_desc = "itlb misses per million insns", 1950 .ratio_mul = 1e6, 1951 }, 1952 { 1953 .name = "dtlb_misses", 1954 .attr = { 1955 .type = PERF_TYPE_HW_CACHE, 1956 .config = 1957 PERF_COUNT_HW_CACHE_DTLB | 1958 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1959 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16), 1960 .exclude_user = 1 1961 }, 1962 .ratio_metric = 2, 1963 .ratio_desc = "dtlb misses per million insns", 1964 .ratio_mul = 1e6, 1965 }, 1966 }; 1967 1968 static __u64 profile_total_count; 1969 1970 #define MAX_NUM_PROFILE_METRICS 4 1971 1972 static int profile_parse_metrics(int argc, char **argv) 1973 { 1974 unsigned int metric_cnt; 1975 int selected_cnt = 0; 1976 unsigned int i; 1977 1978 metric_cnt = sizeof(metrics) / sizeof(struct profile_metric); 1979 1980 while (argc > 0) { 1981 for (i = 0; i < metric_cnt; i++) { 1982 if (is_prefix(argv[0], metrics[i].name)) { 1983 if (!metrics[i].selected) 1984 selected_cnt++; 1985 metrics[i].selected = true; 1986 break; 1987 } 1988 } 1989 if (i == metric_cnt) { 1990 p_err("unknown metric %s", argv[0]); 1991 return -1; 1992 } 1993 NEXT_ARG(); 1994 } 1995 if (selected_cnt > MAX_NUM_PROFILE_METRICS) { 1996 p_err("too many (%d) metrics, please specify no more than %d metrics at at time", 1997 selected_cnt, MAX_NUM_PROFILE_METRICS); 1998 return -1; 1999 } 2000 return selected_cnt; 2001 } 2002 2003 static void profile_read_values(struct profiler_bpf *obj) 2004 { 2005 __u32 m, cpu, num_cpu = obj->rodata->num_cpu; 2006 int reading_map_fd, count_map_fd; 2007 __u64 counts[num_cpu]; 2008 __u32 key = 0; 2009 int err; 2010 2011 reading_map_fd = bpf_map__fd(obj->maps.accum_readings); 2012 count_map_fd = bpf_map__fd(obj->maps.counts); 2013 if (reading_map_fd < 0 || count_map_fd < 0) { 2014 p_err("failed to get fd for map"); 2015 return; 2016 } 2017 2018 err = bpf_map_lookup_elem(count_map_fd, &key, counts); 2019 if (err) { 2020 p_err("failed to read count_map: %s", strerror(errno)); 2021 return; 2022 } 2023 2024 profile_total_count = 0; 2025 for (cpu = 0; cpu < num_cpu; cpu++) 2026 profile_total_count += counts[cpu]; 2027 2028 for (m = 0; m < ARRAY_SIZE(metrics); m++) { 2029 struct bpf_perf_event_value values[num_cpu]; 2030 2031 if (!metrics[m].selected) 2032 continue; 2033 2034 err = bpf_map_lookup_elem(reading_map_fd, &key, values); 2035 if (err) { 2036 p_err("failed to read reading_map: %s", 2037 strerror(errno)); 2038 return; 2039 } 2040 for (cpu = 0; cpu < num_cpu; cpu++) { 2041 metrics[m].val.counter += values[cpu].counter; 2042 metrics[m].val.enabled += values[cpu].enabled; 2043 metrics[m].val.running += values[cpu].running; 2044 } 2045 key++; 2046 } 2047 } 2048 2049 static void profile_print_readings_json(void) 2050 { 2051 __u32 m; 2052 2053 jsonw_start_array(json_wtr); 2054 for (m = 0; m < ARRAY_SIZE(metrics); m++) { 2055 if (!metrics[m].selected) 2056 continue; 2057 jsonw_start_object(json_wtr); 2058 jsonw_string_field(json_wtr, "metric", metrics[m].name); 2059 jsonw_lluint_field(json_wtr, "run_cnt", profile_total_count); 2060 jsonw_lluint_field(json_wtr, "value", metrics[m].val.counter); 2061 jsonw_lluint_field(json_wtr, "enabled", metrics[m].val.enabled); 2062 jsonw_lluint_field(json_wtr, "running", metrics[m].val.running); 2063 2064 jsonw_end_object(json_wtr); 2065 } 2066 jsonw_end_array(json_wtr); 2067 } 2068 2069 static void profile_print_readings_plain(void) 2070 { 2071 __u32 m; 2072 2073 printf("\n%18llu %-20s\n", profile_total_count, "run_cnt"); 2074 for (m = 0; m < ARRAY_SIZE(metrics); m++) { 2075 struct bpf_perf_event_value *val = &metrics[m].val; 2076 int r; 2077 2078 if (!metrics[m].selected) 2079 continue; 2080 printf("%18llu %-20s", val->counter, metrics[m].name); 2081 2082 r = metrics[m].ratio_metric - 1; 2083 if (r >= 0 && metrics[r].selected && 2084 metrics[r].val.counter > 0) { 2085 printf("# %8.2f %-30s", 2086 val->counter * metrics[m].ratio_mul / 2087 metrics[r].val.counter, 2088 metrics[m].ratio_desc); 2089 } else { 2090 printf("%-41s", ""); 2091 } 2092 2093 if (val->enabled > val->running) 2094 printf("(%4.2f%%)", 2095 val->running * 100.0 / val->enabled); 2096 printf("\n"); 2097 } 2098 } 2099 2100 static void profile_print_readings(void) 2101 { 2102 if (json_output) 2103 profile_print_readings_json(); 2104 else 2105 profile_print_readings_plain(); 2106 } 2107 2108 static char *profile_target_name(int tgt_fd) 2109 { 2110 struct bpf_func_info func_info; 2111 struct bpf_prog_info info = {}; 2112 __u32 info_len = sizeof(info); 2113 const struct btf_type *t; 2114 __u32 func_info_rec_size; 2115 struct btf *btf = NULL; 2116 char *name = NULL; 2117 int err; 2118 2119 err = bpf_obj_get_info_by_fd(tgt_fd, &info, &info_len); 2120 if (err) { 2121 p_err("failed to bpf_obj_get_info_by_fd for prog FD %d", tgt_fd); 2122 goto out; 2123 } 2124 2125 if (info.btf_id == 0) { 2126 p_err("prog FD %d doesn't have valid btf", tgt_fd); 2127 goto out; 2128 } 2129 2130 func_info_rec_size = info.func_info_rec_size; 2131 if (info.nr_func_info == 0) { 2132 p_err("bpf_obj_get_info_by_fd for prog FD %d found 0 func_info", tgt_fd); 2133 goto out; 2134 } 2135 2136 memset(&info, 0, sizeof(info)); 2137 info.nr_func_info = 1; 2138 info.func_info_rec_size = func_info_rec_size; 2139 info.func_info = ptr_to_u64(&func_info); 2140 2141 err = bpf_obj_get_info_by_fd(tgt_fd, &info, &info_len); 2142 if (err) { 2143 p_err("failed to get func_info for prog FD %d", tgt_fd); 2144 goto out; 2145 } 2146 2147 btf = btf__load_from_kernel_by_id(info.btf_id); 2148 if (libbpf_get_error(btf)) { 2149 p_err("failed to load btf for prog FD %d", tgt_fd); 2150 goto out; 2151 } 2152 2153 t = btf__type_by_id(btf, func_info.type_id); 2154 if (!t) { 2155 p_err("btf %d doesn't have type %d", 2156 info.btf_id, func_info.type_id); 2157 goto out; 2158 } 2159 name = strdup(btf__name_by_offset(btf, t->name_off)); 2160 out: 2161 btf__free(btf); 2162 return name; 2163 } 2164 2165 static struct profiler_bpf *profile_obj; 2166 static int profile_tgt_fd = -1; 2167 static char *profile_tgt_name; 2168 static int *profile_perf_events; 2169 static int profile_perf_event_cnt; 2170 2171 static void profile_close_perf_events(struct profiler_bpf *obj) 2172 { 2173 int i; 2174 2175 for (i = profile_perf_event_cnt - 1; i >= 0; i--) 2176 close(profile_perf_events[i]); 2177 2178 free(profile_perf_events); 2179 profile_perf_event_cnt = 0; 2180 } 2181 2182 static int profile_open_perf_events(struct profiler_bpf *obj) 2183 { 2184 unsigned int cpu, m; 2185 int map_fd, pmu_fd; 2186 2187 profile_perf_events = calloc( 2188 sizeof(int), obj->rodata->num_cpu * obj->rodata->num_metric); 2189 if (!profile_perf_events) { 2190 p_err("failed to allocate memory for perf_event array: %s", 2191 strerror(errno)); 2192 return -1; 2193 } 2194 map_fd = bpf_map__fd(obj->maps.events); 2195 if (map_fd < 0) { 2196 p_err("failed to get fd for events map"); 2197 return -1; 2198 } 2199 2200 for (m = 0; m < ARRAY_SIZE(metrics); m++) { 2201 if (!metrics[m].selected) 2202 continue; 2203 for (cpu = 0; cpu < obj->rodata->num_cpu; cpu++) { 2204 pmu_fd = syscall(__NR_perf_event_open, &metrics[m].attr, 2205 -1/*pid*/, cpu, -1/*group_fd*/, 0); 2206 if (pmu_fd < 0 || 2207 bpf_map_update_elem(map_fd, &profile_perf_event_cnt, 2208 &pmu_fd, BPF_ANY) || 2209 ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0)) { 2210 p_err("failed to create event %s on cpu %d", 2211 metrics[m].name, cpu); 2212 return -1; 2213 } 2214 profile_perf_events[profile_perf_event_cnt++] = pmu_fd; 2215 } 2216 } 2217 return 0; 2218 } 2219 2220 static void profile_print_and_cleanup(void) 2221 { 2222 profile_close_perf_events(profile_obj); 2223 profile_read_values(profile_obj); 2224 profile_print_readings(); 2225 profiler_bpf__destroy(profile_obj); 2226 2227 close(profile_tgt_fd); 2228 free(profile_tgt_name); 2229 } 2230 2231 static void int_exit(int signo) 2232 { 2233 profile_print_and_cleanup(); 2234 exit(0); 2235 } 2236 2237 static int do_profile(int argc, char **argv) 2238 { 2239 int num_metric, num_cpu, err = -1; 2240 struct bpf_program *prog; 2241 unsigned long duration; 2242 char *endptr; 2243 2244 /* we at least need two args for the prog and one metric */ 2245 if (!REQ_ARGS(3)) 2246 return -EINVAL; 2247 2248 /* parse target fd */ 2249 profile_tgt_fd = prog_parse_fd(&argc, &argv); 2250 if (profile_tgt_fd < 0) { 2251 p_err("failed to parse fd"); 2252 return -1; 2253 } 2254 2255 /* parse profiling optional duration */ 2256 if (argc > 2 && is_prefix(argv[0], "duration")) { 2257 NEXT_ARG(); 2258 duration = strtoul(*argv, &endptr, 0); 2259 if (*endptr) 2260 usage(); 2261 NEXT_ARG(); 2262 } else { 2263 duration = UINT_MAX; 2264 } 2265 2266 num_metric = profile_parse_metrics(argc, argv); 2267 if (num_metric <= 0) 2268 goto out; 2269 2270 num_cpu = libbpf_num_possible_cpus(); 2271 if (num_cpu <= 0) { 2272 p_err("failed to identify number of CPUs"); 2273 goto out; 2274 } 2275 2276 profile_obj = profiler_bpf__open(); 2277 if (!profile_obj) { 2278 p_err("failed to open and/or load BPF object"); 2279 goto out; 2280 } 2281 2282 profile_obj->rodata->num_cpu = num_cpu; 2283 profile_obj->rodata->num_metric = num_metric; 2284 2285 /* adjust map sizes */ 2286 bpf_map__resize(profile_obj->maps.events, num_metric * num_cpu); 2287 bpf_map__resize(profile_obj->maps.fentry_readings, num_metric); 2288 bpf_map__resize(profile_obj->maps.accum_readings, num_metric); 2289 bpf_map__resize(profile_obj->maps.counts, 1); 2290 2291 /* change target name */ 2292 profile_tgt_name = profile_target_name(profile_tgt_fd); 2293 if (!profile_tgt_name) 2294 goto out; 2295 2296 bpf_object__for_each_program(prog, profile_obj->obj) { 2297 err = bpf_program__set_attach_target(prog, profile_tgt_fd, 2298 profile_tgt_name); 2299 if (err) { 2300 p_err("failed to set attach target\n"); 2301 goto out; 2302 } 2303 } 2304 2305 set_max_rlimit(); 2306 err = profiler_bpf__load(profile_obj); 2307 if (err) { 2308 p_err("failed to load profile_obj"); 2309 goto out; 2310 } 2311 2312 err = profile_open_perf_events(profile_obj); 2313 if (err) 2314 goto out; 2315 2316 err = profiler_bpf__attach(profile_obj); 2317 if (err) { 2318 p_err("failed to attach profile_obj"); 2319 goto out; 2320 } 2321 signal(SIGINT, int_exit); 2322 2323 sleep(duration); 2324 profile_print_and_cleanup(); 2325 return 0; 2326 2327 out: 2328 profile_close_perf_events(profile_obj); 2329 if (profile_obj) 2330 profiler_bpf__destroy(profile_obj); 2331 close(profile_tgt_fd); 2332 free(profile_tgt_name); 2333 return err; 2334 } 2335 2336 #endif /* BPFTOOL_WITHOUT_SKELETONS */ 2337 2338 static int do_help(int argc, char **argv) 2339 { 2340 if (json_output) { 2341 jsonw_null(json_wtr); 2342 return 0; 2343 } 2344 2345 fprintf(stderr, 2346 "Usage: %1$s %2$s { show | list } [PROG]\n" 2347 " %1$s %2$s dump xlated PROG [{ file FILE | opcodes | visual | linum }]\n" 2348 " %1$s %2$s dump jited PROG [{ file FILE | opcodes | linum }]\n" 2349 " %1$s %2$s pin PROG FILE\n" 2350 " %1$s %2$s { load | loadall } OBJ PATH \\\n" 2351 " [type TYPE] [dev NAME] \\\n" 2352 " [map { idx IDX | name NAME } MAP]\\\n" 2353 " [pinmaps MAP_DIR]\n" 2354 " %1$s %2$s attach PROG ATTACH_TYPE [MAP]\n" 2355 " %1$s %2$s detach PROG ATTACH_TYPE [MAP]\n" 2356 " %1$s %2$s run PROG \\\n" 2357 " data_in FILE \\\n" 2358 " [data_out FILE [data_size_out L]] \\\n" 2359 " [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n" 2360 " [repeat N]\n" 2361 " %1$s %2$s profile PROG [duration DURATION] METRICs\n" 2362 " %1$s %2$s tracelog\n" 2363 " %1$s %2$s help\n" 2364 "\n" 2365 " " HELP_SPEC_MAP "\n" 2366 " " HELP_SPEC_PROGRAM "\n" 2367 " TYPE := { socket | kprobe | kretprobe | classifier | action |\n" 2368 " tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n" 2369 " cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n" 2370 " lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n" 2371 " sk_reuseport | flow_dissector | cgroup/sysctl |\n" 2372 " cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n" 2373 " cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n" 2374 " cgroup/getpeername4 | cgroup/getpeername6 |\n" 2375 " cgroup/getsockname4 | cgroup/getsockname6 | cgroup/sendmsg4 |\n" 2376 " cgroup/sendmsg6 | cgroup/recvmsg4 | cgroup/recvmsg6 |\n" 2377 " cgroup/getsockopt | cgroup/setsockopt | cgroup/sock_release |\n" 2378 " struct_ops | fentry | fexit | freplace | sk_lookup }\n" 2379 " ATTACH_TYPE := { msg_verdict | skb_verdict | stream_verdict |\n" 2380 " stream_parser | flow_dissector }\n" 2381 " METRIC := { cycles | instructions | l1d_loads | llc_misses | itlb_misses | dtlb_misses }\n" 2382 " " HELP_SPEC_OPTIONS " |\n" 2383 " {-f|--bpffs} | {-m|--mapcompat} | {-n|--nomount} |\n" 2384 " {-L|--use-loader} }\n" 2385 "", 2386 bin_name, argv[-2]); 2387 2388 return 0; 2389 } 2390 2391 static const struct cmd cmds[] = { 2392 { "show", do_show }, 2393 { "list", do_show }, 2394 { "help", do_help }, 2395 { "dump", do_dump }, 2396 { "pin", do_pin }, 2397 { "load", do_load }, 2398 { "loadall", do_loadall }, 2399 { "attach", do_attach }, 2400 { "detach", do_detach }, 2401 { "tracelog", do_tracelog }, 2402 { "run", do_run }, 2403 { "profile", do_profile }, 2404 { 0 } 2405 }; 2406 2407 int do_prog(int argc, char **argv) 2408 { 2409 return cmd_select(cmds, argc, argv, do_help); 2410 } 2411