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