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 struct btf *btf = NULL; 253 unsigned int i, vlen; 254 void *value = NULL; 255 const char *name; 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 err = btf__get_from_id(map_info.btf_id, &btf); 267 if (err || !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 && btf__get_from_id(info->btf_id, &btf)) { 650 p_err("failed to get btf"); 651 return -1; 652 } 653 654 func_info = u64_to_ptr(info->func_info); 655 656 if (info->nr_line_info) { 657 prog_linfo = bpf_prog_linfo__new(info); 658 if (!prog_linfo) 659 p_info("error in processing bpf_line_info. continue without it."); 660 } 661 662 if (filepath) { 663 fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600); 664 if (fd < 0) { 665 p_err("can't open file %s: %s", filepath, 666 strerror(errno)); 667 return -1; 668 } 669 670 n = write(fd, buf, member_len); 671 close(fd); 672 if (n != (ssize_t)member_len) { 673 p_err("error writing output file: %s", 674 n < 0 ? strerror(errno) : "short write"); 675 return -1; 676 } 677 678 if (json_output) 679 jsonw_null(json_wtr); 680 } else if (mode == DUMP_JITED) { 681 const char *name = NULL; 682 683 if (info->ifindex) { 684 name = ifindex_to_bfd_params(info->ifindex, 685 info->netns_dev, 686 info->netns_ino, 687 &disasm_opt); 688 if (!name) 689 return -1; 690 } 691 692 if (info->nr_jited_func_lens && info->jited_func_lens) { 693 struct kernel_sym *sym = NULL; 694 struct bpf_func_info *record; 695 char sym_name[SYM_MAX_NAME]; 696 unsigned char *img = buf; 697 __u64 *ksyms = NULL; 698 __u32 *lens; 699 __u32 i; 700 if (info->nr_jited_ksyms) { 701 kernel_syms_load(&dd); 702 ksyms = u64_to_ptr(info->jited_ksyms); 703 } 704 705 if (json_output) 706 jsonw_start_array(json_wtr); 707 708 lens = u64_to_ptr(info->jited_func_lens); 709 for (i = 0; i < info->nr_jited_func_lens; i++) { 710 if (ksyms) { 711 sym = kernel_syms_search(&dd, ksyms[i]); 712 if (sym) 713 sprintf(sym_name, "%s", sym->name); 714 else 715 sprintf(sym_name, "0x%016llx", ksyms[i]); 716 } else { 717 strcpy(sym_name, "unknown"); 718 } 719 720 if (func_info) { 721 record = func_info + i * info->func_info_rec_size; 722 btf_dumper_type_only(btf, record->type_id, 723 func_sig, 724 sizeof(func_sig)); 725 } 726 727 if (json_output) { 728 jsonw_start_object(json_wtr); 729 if (func_info && func_sig[0] != '\0') { 730 jsonw_name(json_wtr, "proto"); 731 jsonw_string(json_wtr, func_sig); 732 } 733 jsonw_name(json_wtr, "name"); 734 jsonw_string(json_wtr, sym_name); 735 jsonw_name(json_wtr, "insns"); 736 } else { 737 if (func_info && func_sig[0] != '\0') 738 printf("%s:\n", func_sig); 739 printf("%s:\n", sym_name); 740 } 741 742 disasm_print_insn(img, lens[i], opcodes, 743 name, disasm_opt, btf, 744 prog_linfo, ksyms[i], i, 745 linum); 746 747 img += lens[i]; 748 749 if (json_output) 750 jsonw_end_object(json_wtr); 751 else 752 printf("\n"); 753 } 754 755 if (json_output) 756 jsonw_end_array(json_wtr); 757 } else { 758 disasm_print_insn(buf, member_len, opcodes, name, 759 disasm_opt, btf, NULL, 0, 0, false); 760 } 761 } else if (visual) { 762 if (json_output) 763 jsonw_null(json_wtr); 764 else 765 dump_xlated_cfg(buf, member_len); 766 } else { 767 kernel_syms_load(&dd); 768 dd.nr_jited_ksyms = info->nr_jited_ksyms; 769 dd.jited_ksyms = u64_to_ptr(info->jited_ksyms); 770 dd.btf = btf; 771 dd.func_info = func_info; 772 dd.finfo_rec_size = info->func_info_rec_size; 773 dd.prog_linfo = prog_linfo; 774 775 if (json_output) 776 dump_xlated_json(&dd, buf, member_len, opcodes, 777 linum); 778 else 779 dump_xlated_plain(&dd, buf, member_len, opcodes, 780 linum); 781 kernel_syms_destroy(&dd); 782 } 783 784 return 0; 785 } 786 787 static int do_dump(int argc, char **argv) 788 { 789 struct bpf_prog_info_linear *info_linear; 790 char *filepath = NULL; 791 bool opcodes = false; 792 bool visual = false; 793 enum dump_mode mode; 794 bool linum = false; 795 int *fds = NULL; 796 int nb_fds, i = 0; 797 int err = -1; 798 __u64 arrays; 799 800 if (is_prefix(*argv, "jited")) { 801 if (disasm_init()) 802 return -1; 803 mode = DUMP_JITED; 804 } else if (is_prefix(*argv, "xlated")) { 805 mode = DUMP_XLATED; 806 } else { 807 p_err("expected 'xlated' or 'jited', got: %s", *argv); 808 return -1; 809 } 810 NEXT_ARG(); 811 812 if (argc < 2) 813 usage(); 814 815 fds = malloc(sizeof(int)); 816 if (!fds) { 817 p_err("mem alloc failed"); 818 return -1; 819 } 820 nb_fds = prog_parse_fds(&argc, &argv, &fds); 821 if (nb_fds < 1) 822 goto exit_free; 823 824 if (is_prefix(*argv, "file")) { 825 NEXT_ARG(); 826 if (!argc) { 827 p_err("expected file path"); 828 goto exit_close; 829 } 830 if (nb_fds > 1) { 831 p_err("several programs matched"); 832 goto exit_close; 833 } 834 835 filepath = *argv; 836 NEXT_ARG(); 837 } else if (is_prefix(*argv, "opcodes")) { 838 opcodes = true; 839 NEXT_ARG(); 840 } else if (is_prefix(*argv, "visual")) { 841 if (nb_fds > 1) { 842 p_err("several programs matched"); 843 goto exit_close; 844 } 845 846 visual = true; 847 NEXT_ARG(); 848 } else if (is_prefix(*argv, "linum")) { 849 linum = true; 850 NEXT_ARG(); 851 } 852 853 if (argc) { 854 usage(); 855 goto exit_close; 856 } 857 858 if (mode == DUMP_JITED) 859 arrays = 1UL << BPF_PROG_INFO_JITED_INSNS; 860 else 861 arrays = 1UL << BPF_PROG_INFO_XLATED_INSNS; 862 863 arrays |= 1UL << BPF_PROG_INFO_JITED_KSYMS; 864 arrays |= 1UL << BPF_PROG_INFO_JITED_FUNC_LENS; 865 arrays |= 1UL << BPF_PROG_INFO_FUNC_INFO; 866 arrays |= 1UL << BPF_PROG_INFO_LINE_INFO; 867 arrays |= 1UL << BPF_PROG_INFO_JITED_LINE_INFO; 868 869 if (json_output && nb_fds > 1) 870 jsonw_start_array(json_wtr); /* root array */ 871 for (i = 0; i < nb_fds; i++) { 872 info_linear = bpf_program__get_prog_info_linear(fds[i], arrays); 873 if (IS_ERR_OR_NULL(info_linear)) { 874 p_err("can't get prog info: %s", strerror(errno)); 875 break; 876 } 877 878 if (json_output && nb_fds > 1) { 879 jsonw_start_object(json_wtr); /* prog object */ 880 print_prog_header_json(&info_linear->info); 881 jsonw_name(json_wtr, "insns"); 882 } else if (nb_fds > 1) { 883 print_prog_header_plain(&info_linear->info); 884 } 885 886 err = prog_dump(&info_linear->info, mode, filepath, opcodes, 887 visual, linum); 888 889 if (json_output && nb_fds > 1) 890 jsonw_end_object(json_wtr); /* prog object */ 891 else if (i != nb_fds - 1 && nb_fds > 1) 892 printf("\n"); 893 894 free(info_linear); 895 if (err) 896 break; 897 close(fds[i]); 898 } 899 if (json_output && nb_fds > 1) 900 jsonw_end_array(json_wtr); /* root array */ 901 902 exit_close: 903 for (; i < nb_fds; i++) 904 close(fds[i]); 905 exit_free: 906 free(fds); 907 return err; 908 } 909 910 static int do_pin(int argc, char **argv) 911 { 912 int err; 913 914 err = do_pin_any(argc, argv, prog_parse_fd); 915 if (!err && json_output) 916 jsonw_null(json_wtr); 917 return err; 918 } 919 920 struct map_replace { 921 int idx; 922 int fd; 923 char *name; 924 }; 925 926 static int map_replace_compar(const void *p1, const void *p2) 927 { 928 const struct map_replace *a = p1, *b = p2; 929 930 return a->idx - b->idx; 931 } 932 933 static int parse_attach_detach_args(int argc, char **argv, int *progfd, 934 enum bpf_attach_type *attach_type, 935 int *mapfd) 936 { 937 if (!REQ_ARGS(3)) 938 return -EINVAL; 939 940 *progfd = prog_parse_fd(&argc, &argv); 941 if (*progfd < 0) 942 return *progfd; 943 944 *attach_type = parse_attach_type(*argv); 945 if (*attach_type == __MAX_BPF_ATTACH_TYPE) { 946 p_err("invalid attach/detach type"); 947 return -EINVAL; 948 } 949 950 if (*attach_type == BPF_FLOW_DISSECTOR) { 951 *mapfd = 0; 952 return 0; 953 } 954 955 NEXT_ARG(); 956 if (!REQ_ARGS(2)) 957 return -EINVAL; 958 959 *mapfd = map_parse_fd(&argc, &argv); 960 if (*mapfd < 0) 961 return *mapfd; 962 963 return 0; 964 } 965 966 static int do_attach(int argc, char **argv) 967 { 968 enum bpf_attach_type attach_type; 969 int err, progfd; 970 int mapfd; 971 972 err = parse_attach_detach_args(argc, argv, 973 &progfd, &attach_type, &mapfd); 974 if (err) 975 return err; 976 977 err = bpf_prog_attach(progfd, mapfd, attach_type, 0); 978 if (err) { 979 p_err("failed prog attach to map"); 980 return -EINVAL; 981 } 982 983 if (json_output) 984 jsonw_null(json_wtr); 985 return 0; 986 } 987 988 static int do_detach(int argc, char **argv) 989 { 990 enum bpf_attach_type attach_type; 991 int err, progfd; 992 int mapfd; 993 994 err = parse_attach_detach_args(argc, argv, 995 &progfd, &attach_type, &mapfd); 996 if (err) 997 return err; 998 999 err = bpf_prog_detach2(progfd, mapfd, attach_type); 1000 if (err) { 1001 p_err("failed prog detach from map"); 1002 return -EINVAL; 1003 } 1004 1005 if (json_output) 1006 jsonw_null(json_wtr); 1007 return 0; 1008 } 1009 1010 static int check_single_stdin(char *file_data_in, char *file_ctx_in) 1011 { 1012 if (file_data_in && file_ctx_in && 1013 !strcmp(file_data_in, "-") && !strcmp(file_ctx_in, "-")) { 1014 p_err("cannot use standard input for both data_in and ctx_in"); 1015 return -1; 1016 } 1017 1018 return 0; 1019 } 1020 1021 static int get_run_data(const char *fname, void **data_ptr, unsigned int *size) 1022 { 1023 size_t block_size = 256; 1024 size_t buf_size = block_size; 1025 size_t nb_read = 0; 1026 void *tmp; 1027 FILE *f; 1028 1029 if (!fname) { 1030 *data_ptr = NULL; 1031 *size = 0; 1032 return 0; 1033 } 1034 1035 if (!strcmp(fname, "-")) 1036 f = stdin; 1037 else 1038 f = fopen(fname, "r"); 1039 if (!f) { 1040 p_err("failed to open %s: %s", fname, strerror(errno)); 1041 return -1; 1042 } 1043 1044 *data_ptr = malloc(block_size); 1045 if (!*data_ptr) { 1046 p_err("failed to allocate memory for data_in/ctx_in: %s", 1047 strerror(errno)); 1048 goto err_fclose; 1049 } 1050 1051 while ((nb_read += fread(*data_ptr + nb_read, 1, block_size, f))) { 1052 if (feof(f)) 1053 break; 1054 if (ferror(f)) { 1055 p_err("failed to read data_in/ctx_in from %s: %s", 1056 fname, strerror(errno)); 1057 goto err_free; 1058 } 1059 if (nb_read > buf_size - block_size) { 1060 if (buf_size == UINT32_MAX) { 1061 p_err("data_in/ctx_in is too long (max: %d)", 1062 UINT32_MAX); 1063 goto err_free; 1064 } 1065 /* No space for fread()-ing next chunk; realloc() */ 1066 buf_size *= 2; 1067 tmp = realloc(*data_ptr, buf_size); 1068 if (!tmp) { 1069 p_err("failed to reallocate data_in/ctx_in: %s", 1070 strerror(errno)); 1071 goto err_free; 1072 } 1073 *data_ptr = tmp; 1074 } 1075 } 1076 if (f != stdin) 1077 fclose(f); 1078 1079 *size = nb_read; 1080 return 0; 1081 1082 err_free: 1083 free(*data_ptr); 1084 *data_ptr = NULL; 1085 err_fclose: 1086 if (f != stdin) 1087 fclose(f); 1088 return -1; 1089 } 1090 1091 static void hex_print(void *data, unsigned int size, FILE *f) 1092 { 1093 size_t i, j; 1094 char c; 1095 1096 for (i = 0; i < size; i += 16) { 1097 /* Row offset */ 1098 fprintf(f, "%07zx\t", i); 1099 1100 /* Hexadecimal values */ 1101 for (j = i; j < i + 16 && j < size; j++) 1102 fprintf(f, "%02x%s", *(uint8_t *)(data + j), 1103 j % 2 ? " " : ""); 1104 for (; j < i + 16; j++) 1105 fprintf(f, " %s", j % 2 ? " " : ""); 1106 1107 /* ASCII values (if relevant), '.' otherwise */ 1108 fprintf(f, "| "); 1109 for (j = i; j < i + 16 && j < size; j++) { 1110 c = *(char *)(data + j); 1111 if (c < ' ' || c > '~') 1112 c = '.'; 1113 fprintf(f, "%c%s", c, j == i + 7 ? " " : ""); 1114 } 1115 1116 fprintf(f, "\n"); 1117 } 1118 } 1119 1120 static int 1121 print_run_output(void *data, unsigned int size, const char *fname, 1122 const char *json_key) 1123 { 1124 size_t nb_written; 1125 FILE *f; 1126 1127 if (!fname) 1128 return 0; 1129 1130 if (!strcmp(fname, "-")) { 1131 f = stdout; 1132 if (json_output) { 1133 jsonw_name(json_wtr, json_key); 1134 print_data_json(data, size); 1135 } else { 1136 hex_print(data, size, f); 1137 } 1138 return 0; 1139 } 1140 1141 f = fopen(fname, "w"); 1142 if (!f) { 1143 p_err("failed to open %s: %s", fname, strerror(errno)); 1144 return -1; 1145 } 1146 1147 nb_written = fwrite(data, 1, size, f); 1148 fclose(f); 1149 if (nb_written != size) { 1150 p_err("failed to write output data/ctx: %s", strerror(errno)); 1151 return -1; 1152 } 1153 1154 return 0; 1155 } 1156 1157 static int alloc_run_data(void **data_ptr, unsigned int size_out) 1158 { 1159 *data_ptr = calloc(size_out, 1); 1160 if (!*data_ptr) { 1161 p_err("failed to allocate memory for output data/ctx: %s", 1162 strerror(errno)); 1163 return -1; 1164 } 1165 1166 return 0; 1167 } 1168 1169 static int do_run(int argc, char **argv) 1170 { 1171 char *data_fname_in = NULL, *data_fname_out = NULL; 1172 char *ctx_fname_in = NULL, *ctx_fname_out = NULL; 1173 struct bpf_prog_test_run_attr test_attr = {0}; 1174 const unsigned int default_size = SZ_32K; 1175 void *data_in = NULL, *data_out = NULL; 1176 void *ctx_in = NULL, *ctx_out = NULL; 1177 unsigned int repeat = 1; 1178 int fd, err; 1179 1180 if (!REQ_ARGS(4)) 1181 return -1; 1182 1183 fd = prog_parse_fd(&argc, &argv); 1184 if (fd < 0) 1185 return -1; 1186 1187 while (argc) { 1188 if (detect_common_prefix(*argv, "data_in", "data_out", 1189 "data_size_out", NULL)) 1190 return -1; 1191 if (detect_common_prefix(*argv, "ctx_in", "ctx_out", 1192 "ctx_size_out", NULL)) 1193 return -1; 1194 1195 if (is_prefix(*argv, "data_in")) { 1196 NEXT_ARG(); 1197 if (!REQ_ARGS(1)) 1198 return -1; 1199 1200 data_fname_in = GET_ARG(); 1201 if (check_single_stdin(data_fname_in, ctx_fname_in)) 1202 return -1; 1203 } else if (is_prefix(*argv, "data_out")) { 1204 NEXT_ARG(); 1205 if (!REQ_ARGS(1)) 1206 return -1; 1207 1208 data_fname_out = GET_ARG(); 1209 } else if (is_prefix(*argv, "data_size_out")) { 1210 char *endptr; 1211 1212 NEXT_ARG(); 1213 if (!REQ_ARGS(1)) 1214 return -1; 1215 1216 test_attr.data_size_out = strtoul(*argv, &endptr, 0); 1217 if (*endptr) { 1218 p_err("can't parse %s as output data size", 1219 *argv); 1220 return -1; 1221 } 1222 NEXT_ARG(); 1223 } else if (is_prefix(*argv, "ctx_in")) { 1224 NEXT_ARG(); 1225 if (!REQ_ARGS(1)) 1226 return -1; 1227 1228 ctx_fname_in = GET_ARG(); 1229 if (check_single_stdin(data_fname_in, ctx_fname_in)) 1230 return -1; 1231 } else if (is_prefix(*argv, "ctx_out")) { 1232 NEXT_ARG(); 1233 if (!REQ_ARGS(1)) 1234 return -1; 1235 1236 ctx_fname_out = GET_ARG(); 1237 } else if (is_prefix(*argv, "ctx_size_out")) { 1238 char *endptr; 1239 1240 NEXT_ARG(); 1241 if (!REQ_ARGS(1)) 1242 return -1; 1243 1244 test_attr.ctx_size_out = strtoul(*argv, &endptr, 0); 1245 if (*endptr) { 1246 p_err("can't parse %s as output context size", 1247 *argv); 1248 return -1; 1249 } 1250 NEXT_ARG(); 1251 } else if (is_prefix(*argv, "repeat")) { 1252 char *endptr; 1253 1254 NEXT_ARG(); 1255 if (!REQ_ARGS(1)) 1256 return -1; 1257 1258 repeat = strtoul(*argv, &endptr, 0); 1259 if (*endptr) { 1260 p_err("can't parse %s as repeat number", 1261 *argv); 1262 return -1; 1263 } 1264 NEXT_ARG(); 1265 } else { 1266 p_err("expected no more arguments, 'data_in', 'data_out', 'data_size_out', 'ctx_in', 'ctx_out', 'ctx_size_out' or 'repeat', got: '%s'?", 1267 *argv); 1268 return -1; 1269 } 1270 } 1271 1272 err = get_run_data(data_fname_in, &data_in, &test_attr.data_size_in); 1273 if (err) 1274 return -1; 1275 1276 if (data_in) { 1277 if (!test_attr.data_size_out) 1278 test_attr.data_size_out = default_size; 1279 err = alloc_run_data(&data_out, test_attr.data_size_out); 1280 if (err) 1281 goto free_data_in; 1282 } 1283 1284 err = get_run_data(ctx_fname_in, &ctx_in, &test_attr.ctx_size_in); 1285 if (err) 1286 goto free_data_out; 1287 1288 if (ctx_in) { 1289 if (!test_attr.ctx_size_out) 1290 test_attr.ctx_size_out = default_size; 1291 err = alloc_run_data(&ctx_out, test_attr.ctx_size_out); 1292 if (err) 1293 goto free_ctx_in; 1294 } 1295 1296 test_attr.prog_fd = fd; 1297 test_attr.repeat = repeat; 1298 test_attr.data_in = data_in; 1299 test_attr.data_out = data_out; 1300 test_attr.ctx_in = ctx_in; 1301 test_attr.ctx_out = ctx_out; 1302 1303 err = bpf_prog_test_run_xattr(&test_attr); 1304 if (err) { 1305 p_err("failed to run program: %s", strerror(errno)); 1306 goto free_ctx_out; 1307 } 1308 1309 err = 0; 1310 1311 if (json_output) 1312 jsonw_start_object(json_wtr); /* root */ 1313 1314 /* Do not exit on errors occurring when printing output data/context, 1315 * we still want to print return value and duration for program run. 1316 */ 1317 if (test_attr.data_size_out) 1318 err += print_run_output(test_attr.data_out, 1319 test_attr.data_size_out, 1320 data_fname_out, "data_out"); 1321 if (test_attr.ctx_size_out) 1322 err += print_run_output(test_attr.ctx_out, 1323 test_attr.ctx_size_out, 1324 ctx_fname_out, "ctx_out"); 1325 1326 if (json_output) { 1327 jsonw_uint_field(json_wtr, "retval", test_attr.retval); 1328 jsonw_uint_field(json_wtr, "duration", test_attr.duration); 1329 jsonw_end_object(json_wtr); /* root */ 1330 } else { 1331 fprintf(stdout, "Return value: %u, duration%s: %uns\n", 1332 test_attr.retval, 1333 repeat > 1 ? " (average)" : "", test_attr.duration); 1334 } 1335 1336 free_ctx_out: 1337 free(ctx_out); 1338 free_ctx_in: 1339 free(ctx_in); 1340 free_data_out: 1341 free(data_out); 1342 free_data_in: 1343 free(data_in); 1344 1345 return err; 1346 } 1347 1348 static int 1349 get_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type, 1350 enum bpf_attach_type *expected_attach_type) 1351 { 1352 libbpf_print_fn_t print_backup; 1353 int ret; 1354 1355 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type); 1356 if (!ret) 1357 return ret; 1358 1359 /* libbpf_prog_type_by_name() failed, let's re-run with debug level */ 1360 print_backup = libbpf_set_print(print_all_levels); 1361 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type); 1362 libbpf_set_print(print_backup); 1363 1364 return ret; 1365 } 1366 1367 static int load_with_options(int argc, char **argv, bool first_prog_only) 1368 { 1369 enum bpf_prog_type common_prog_type = BPF_PROG_TYPE_UNSPEC; 1370 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts, 1371 .relaxed_maps = relaxed_maps, 1372 ); 1373 struct bpf_object_load_attr load_attr = { 0 }; 1374 enum bpf_attach_type expected_attach_type; 1375 struct map_replace *map_replace = NULL; 1376 struct bpf_program *prog = NULL, *pos; 1377 unsigned int old_map_fds = 0; 1378 const char *pinmaps = NULL; 1379 struct bpf_object *obj; 1380 struct bpf_map *map; 1381 const char *pinfile; 1382 unsigned int i, j; 1383 __u32 ifindex = 0; 1384 const char *file; 1385 int idx, err; 1386 1387 1388 if (!REQ_ARGS(2)) 1389 return -1; 1390 file = GET_ARG(); 1391 pinfile = GET_ARG(); 1392 1393 while (argc) { 1394 if (is_prefix(*argv, "type")) { 1395 char *type; 1396 1397 NEXT_ARG(); 1398 1399 if (common_prog_type != BPF_PROG_TYPE_UNSPEC) { 1400 p_err("program type already specified"); 1401 goto err_free_reuse_maps; 1402 } 1403 if (!REQ_ARGS(1)) 1404 goto err_free_reuse_maps; 1405 1406 /* Put a '/' at the end of type to appease libbpf */ 1407 type = malloc(strlen(*argv) + 2); 1408 if (!type) { 1409 p_err("mem alloc failed"); 1410 goto err_free_reuse_maps; 1411 } 1412 *type = 0; 1413 strcat(type, *argv); 1414 strcat(type, "/"); 1415 1416 err = get_prog_type_by_name(type, &common_prog_type, 1417 &expected_attach_type); 1418 free(type); 1419 if (err < 0) 1420 goto err_free_reuse_maps; 1421 1422 NEXT_ARG(); 1423 } else if (is_prefix(*argv, "map")) { 1424 void *new_map_replace; 1425 char *endptr, *name; 1426 int fd; 1427 1428 NEXT_ARG(); 1429 1430 if (!REQ_ARGS(4)) 1431 goto err_free_reuse_maps; 1432 1433 if (is_prefix(*argv, "idx")) { 1434 NEXT_ARG(); 1435 1436 idx = strtoul(*argv, &endptr, 0); 1437 if (*endptr) { 1438 p_err("can't parse %s as IDX", *argv); 1439 goto err_free_reuse_maps; 1440 } 1441 name = NULL; 1442 } else if (is_prefix(*argv, "name")) { 1443 NEXT_ARG(); 1444 1445 name = *argv; 1446 idx = -1; 1447 } else { 1448 p_err("expected 'idx' or 'name', got: '%s'?", 1449 *argv); 1450 goto err_free_reuse_maps; 1451 } 1452 NEXT_ARG(); 1453 1454 fd = map_parse_fd(&argc, &argv); 1455 if (fd < 0) 1456 goto err_free_reuse_maps; 1457 1458 new_map_replace = reallocarray(map_replace, 1459 old_map_fds + 1, 1460 sizeof(*map_replace)); 1461 if (!new_map_replace) { 1462 p_err("mem alloc failed"); 1463 goto err_free_reuse_maps; 1464 } 1465 map_replace = new_map_replace; 1466 1467 map_replace[old_map_fds].idx = idx; 1468 map_replace[old_map_fds].name = name; 1469 map_replace[old_map_fds].fd = fd; 1470 old_map_fds++; 1471 } else if (is_prefix(*argv, "dev")) { 1472 NEXT_ARG(); 1473 1474 if (ifindex) { 1475 p_err("offload device already specified"); 1476 goto err_free_reuse_maps; 1477 } 1478 if (!REQ_ARGS(1)) 1479 goto err_free_reuse_maps; 1480 1481 ifindex = if_nametoindex(*argv); 1482 if (!ifindex) { 1483 p_err("unrecognized netdevice '%s': %s", 1484 *argv, strerror(errno)); 1485 goto err_free_reuse_maps; 1486 } 1487 NEXT_ARG(); 1488 } else if (is_prefix(*argv, "pinmaps")) { 1489 NEXT_ARG(); 1490 1491 if (!REQ_ARGS(1)) 1492 goto err_free_reuse_maps; 1493 1494 pinmaps = GET_ARG(); 1495 } else { 1496 p_err("expected no more arguments, 'type', 'map' or 'dev', got: '%s'?", 1497 *argv); 1498 goto err_free_reuse_maps; 1499 } 1500 } 1501 1502 set_max_rlimit(); 1503 1504 obj = bpf_object__open_file(file, &open_opts); 1505 if (libbpf_get_error(obj)) { 1506 p_err("failed to open object file"); 1507 goto err_free_reuse_maps; 1508 } 1509 1510 bpf_object__for_each_program(pos, obj) { 1511 enum bpf_prog_type prog_type = common_prog_type; 1512 1513 if (prog_type == BPF_PROG_TYPE_UNSPEC) { 1514 const char *sec_name = bpf_program__section_name(pos); 1515 1516 err = get_prog_type_by_name(sec_name, &prog_type, 1517 &expected_attach_type); 1518 if (err < 0) 1519 goto err_close_obj; 1520 } 1521 1522 bpf_program__set_ifindex(pos, ifindex); 1523 bpf_program__set_type(pos, prog_type); 1524 bpf_program__set_expected_attach_type(pos, expected_attach_type); 1525 } 1526 1527 qsort(map_replace, old_map_fds, sizeof(*map_replace), 1528 map_replace_compar); 1529 1530 /* After the sort maps by name will be first on the list, because they 1531 * have idx == -1. Resolve them. 1532 */ 1533 j = 0; 1534 while (j < old_map_fds && map_replace[j].name) { 1535 i = 0; 1536 bpf_object__for_each_map(map, obj) { 1537 if (!strcmp(bpf_map__name(map), map_replace[j].name)) { 1538 map_replace[j].idx = i; 1539 break; 1540 } 1541 i++; 1542 } 1543 if (map_replace[j].idx == -1) { 1544 p_err("unable to find map '%s'", map_replace[j].name); 1545 goto err_close_obj; 1546 } 1547 j++; 1548 } 1549 /* Resort if any names were resolved */ 1550 if (j) 1551 qsort(map_replace, old_map_fds, sizeof(*map_replace), 1552 map_replace_compar); 1553 1554 /* Set ifindex and name reuse */ 1555 j = 0; 1556 idx = 0; 1557 bpf_object__for_each_map(map, obj) { 1558 if (!bpf_map__is_offload_neutral(map)) 1559 bpf_map__set_ifindex(map, ifindex); 1560 1561 if (j < old_map_fds && idx == map_replace[j].idx) { 1562 err = bpf_map__reuse_fd(map, map_replace[j++].fd); 1563 if (err) { 1564 p_err("unable to set up map reuse: %d", err); 1565 goto err_close_obj; 1566 } 1567 1568 /* Next reuse wants to apply to the same map */ 1569 if (j < old_map_fds && map_replace[j].idx == idx) { 1570 p_err("replacement for map idx %d specified more than once", 1571 idx); 1572 goto err_close_obj; 1573 } 1574 } 1575 1576 idx++; 1577 } 1578 if (j < old_map_fds) { 1579 p_err("map idx '%d' not used", map_replace[j].idx); 1580 goto err_close_obj; 1581 } 1582 1583 load_attr.obj = obj; 1584 if (verifier_logs) 1585 /* log_level1 + log_level2 + stats, but not stable UAPI */ 1586 load_attr.log_level = 1 + 2 + 4; 1587 1588 err = bpf_object__load_xattr(&load_attr); 1589 if (err) { 1590 p_err("failed to load object file"); 1591 goto err_close_obj; 1592 } 1593 1594 err = mount_bpffs_for_pin(pinfile); 1595 if (err) 1596 goto err_close_obj; 1597 1598 if (first_prog_only) { 1599 prog = bpf_program__next(NULL, obj); 1600 if (!prog) { 1601 p_err("object file doesn't contain any bpf program"); 1602 goto err_close_obj; 1603 } 1604 1605 err = bpf_obj_pin(bpf_program__fd(prog), pinfile); 1606 if (err) { 1607 p_err("failed to pin program %s", 1608 bpf_program__section_name(prog)); 1609 goto err_close_obj; 1610 } 1611 } else { 1612 err = bpf_object__pin_programs(obj, pinfile); 1613 if (err) { 1614 p_err("failed to pin all programs"); 1615 goto err_close_obj; 1616 } 1617 } 1618 1619 if (pinmaps) { 1620 err = bpf_object__pin_maps(obj, pinmaps); 1621 if (err) { 1622 p_err("failed to pin all maps"); 1623 goto err_unpin; 1624 } 1625 } 1626 1627 if (json_output) 1628 jsonw_null(json_wtr); 1629 1630 bpf_object__close(obj); 1631 for (i = 0; i < old_map_fds; i++) 1632 close(map_replace[i].fd); 1633 free(map_replace); 1634 1635 return 0; 1636 1637 err_unpin: 1638 if (first_prog_only) 1639 unlink(pinfile); 1640 else 1641 bpf_object__unpin_programs(obj, pinfile); 1642 err_close_obj: 1643 bpf_object__close(obj); 1644 err_free_reuse_maps: 1645 for (i = 0; i < old_map_fds; i++) 1646 close(map_replace[i].fd); 1647 free(map_replace); 1648 return -1; 1649 } 1650 1651 static int count_open_fds(void) 1652 { 1653 DIR *dp = opendir("/proc/self/fd"); 1654 struct dirent *de; 1655 int cnt = -3; 1656 1657 if (!dp) 1658 return -1; 1659 1660 while ((de = readdir(dp))) 1661 cnt++; 1662 1663 closedir(dp); 1664 return cnt; 1665 } 1666 1667 static int try_loader(struct gen_loader_opts *gen) 1668 { 1669 struct bpf_load_and_run_opts opts = {}; 1670 struct bpf_loader_ctx *ctx; 1671 int ctx_sz = sizeof(*ctx) + 64 * max(sizeof(struct bpf_map_desc), 1672 sizeof(struct bpf_prog_desc)); 1673 int log_buf_sz = (1u << 24) - 1; 1674 int err, fds_before, fd_delta; 1675 char *log_buf; 1676 1677 ctx = alloca(ctx_sz); 1678 memset(ctx, 0, ctx_sz); 1679 ctx->sz = ctx_sz; 1680 ctx->log_level = 1; 1681 ctx->log_size = log_buf_sz; 1682 log_buf = malloc(log_buf_sz); 1683 if (!log_buf) 1684 return -ENOMEM; 1685 ctx->log_buf = (long) log_buf; 1686 opts.ctx = ctx; 1687 opts.data = gen->data; 1688 opts.data_sz = gen->data_sz; 1689 opts.insns = gen->insns; 1690 opts.insns_sz = gen->insns_sz; 1691 fds_before = count_open_fds(); 1692 err = bpf_load_and_run(&opts); 1693 fd_delta = count_open_fds() - fds_before; 1694 if (err < 0) { 1695 fprintf(stderr, "err %d\n%s\n%s", err, opts.errstr, log_buf); 1696 if (fd_delta) 1697 fprintf(stderr, "loader prog leaked %d FDs\n", 1698 fd_delta); 1699 } 1700 free(log_buf); 1701 return err; 1702 } 1703 1704 static int do_loader(int argc, char **argv) 1705 { 1706 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts); 1707 DECLARE_LIBBPF_OPTS(gen_loader_opts, gen); 1708 struct bpf_object_load_attr load_attr = {}; 1709 struct bpf_object *obj; 1710 const char *file; 1711 int err = 0; 1712 1713 if (!REQ_ARGS(1)) 1714 return -1; 1715 file = GET_ARG(); 1716 1717 obj = bpf_object__open_file(file, &open_opts); 1718 if (libbpf_get_error(obj)) { 1719 p_err("failed to open object file"); 1720 goto err_close_obj; 1721 } 1722 1723 err = bpf_object__gen_loader(obj, &gen); 1724 if (err) 1725 goto err_close_obj; 1726 1727 load_attr.obj = obj; 1728 if (verifier_logs) 1729 /* log_level1 + log_level2 + stats, but not stable UAPI */ 1730 load_attr.log_level = 1 + 2 + 4; 1731 1732 err = bpf_object__load_xattr(&load_attr); 1733 if (err) { 1734 p_err("failed to load object file"); 1735 goto err_close_obj; 1736 } 1737 1738 if (verifier_logs) { 1739 struct dump_data dd = {}; 1740 1741 kernel_syms_load(&dd); 1742 dump_xlated_plain(&dd, (void *)gen.insns, gen.insns_sz, false, false); 1743 kernel_syms_destroy(&dd); 1744 } 1745 err = try_loader(&gen); 1746 err_close_obj: 1747 bpf_object__close(obj); 1748 return err; 1749 } 1750 1751 static int do_load(int argc, char **argv) 1752 { 1753 if (use_loader) 1754 return do_loader(argc, argv); 1755 return load_with_options(argc, argv, true); 1756 } 1757 1758 static int do_loadall(int argc, char **argv) 1759 { 1760 return load_with_options(argc, argv, false); 1761 } 1762 1763 #ifdef BPFTOOL_WITHOUT_SKELETONS 1764 1765 static int do_profile(int argc, char **argv) 1766 { 1767 p_err("bpftool prog profile command is not supported. Please build bpftool with clang >= 10.0.0"); 1768 return 0; 1769 } 1770 1771 #else /* BPFTOOL_WITHOUT_SKELETONS */ 1772 1773 #include "profiler.skel.h" 1774 1775 struct profile_metric { 1776 const char *name; 1777 struct bpf_perf_event_value val; 1778 struct perf_event_attr attr; 1779 bool selected; 1780 1781 /* calculate ratios like instructions per cycle */ 1782 const int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */ 1783 const char *ratio_desc; 1784 const float ratio_mul; 1785 } metrics[] = { 1786 { 1787 .name = "cycles", 1788 .attr = { 1789 .type = PERF_TYPE_HARDWARE, 1790 .config = PERF_COUNT_HW_CPU_CYCLES, 1791 .exclude_user = 1, 1792 }, 1793 }, 1794 { 1795 .name = "instructions", 1796 .attr = { 1797 .type = PERF_TYPE_HARDWARE, 1798 .config = PERF_COUNT_HW_INSTRUCTIONS, 1799 .exclude_user = 1, 1800 }, 1801 .ratio_metric = 1, 1802 .ratio_desc = "insns per cycle", 1803 .ratio_mul = 1.0, 1804 }, 1805 { 1806 .name = "l1d_loads", 1807 .attr = { 1808 .type = PERF_TYPE_HW_CACHE, 1809 .config = 1810 PERF_COUNT_HW_CACHE_L1D | 1811 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1812 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16), 1813 .exclude_user = 1, 1814 }, 1815 }, 1816 { 1817 .name = "llc_misses", 1818 .attr = { 1819 .type = PERF_TYPE_HW_CACHE, 1820 .config = 1821 PERF_COUNT_HW_CACHE_LL | 1822 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1823 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16), 1824 .exclude_user = 1 1825 }, 1826 .ratio_metric = 2, 1827 .ratio_desc = "LLC misses per million insns", 1828 .ratio_mul = 1e6, 1829 }, 1830 { 1831 .name = "itlb_misses", 1832 .attr = { 1833 .type = PERF_TYPE_HW_CACHE, 1834 .config = 1835 PERF_COUNT_HW_CACHE_ITLB | 1836 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1837 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16), 1838 .exclude_user = 1 1839 }, 1840 .ratio_metric = 2, 1841 .ratio_desc = "itlb misses per million insns", 1842 .ratio_mul = 1e6, 1843 }, 1844 { 1845 .name = "dtlb_misses", 1846 .attr = { 1847 .type = PERF_TYPE_HW_CACHE, 1848 .config = 1849 PERF_COUNT_HW_CACHE_DTLB | 1850 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1851 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16), 1852 .exclude_user = 1 1853 }, 1854 .ratio_metric = 2, 1855 .ratio_desc = "dtlb misses per million insns", 1856 .ratio_mul = 1e6, 1857 }, 1858 }; 1859 1860 static __u64 profile_total_count; 1861 1862 #define MAX_NUM_PROFILE_METRICS 4 1863 1864 static int profile_parse_metrics(int argc, char **argv) 1865 { 1866 unsigned int metric_cnt; 1867 int selected_cnt = 0; 1868 unsigned int i; 1869 1870 metric_cnt = sizeof(metrics) / sizeof(struct profile_metric); 1871 1872 while (argc > 0) { 1873 for (i = 0; i < metric_cnt; i++) { 1874 if (is_prefix(argv[0], metrics[i].name)) { 1875 if (!metrics[i].selected) 1876 selected_cnt++; 1877 metrics[i].selected = true; 1878 break; 1879 } 1880 } 1881 if (i == metric_cnt) { 1882 p_err("unknown metric %s", argv[0]); 1883 return -1; 1884 } 1885 NEXT_ARG(); 1886 } 1887 if (selected_cnt > MAX_NUM_PROFILE_METRICS) { 1888 p_err("too many (%d) metrics, please specify no more than %d metrics at at time", 1889 selected_cnt, MAX_NUM_PROFILE_METRICS); 1890 return -1; 1891 } 1892 return selected_cnt; 1893 } 1894 1895 static void profile_read_values(struct profiler_bpf *obj) 1896 { 1897 __u32 m, cpu, num_cpu = obj->rodata->num_cpu; 1898 int reading_map_fd, count_map_fd; 1899 __u64 counts[num_cpu]; 1900 __u32 key = 0; 1901 int err; 1902 1903 reading_map_fd = bpf_map__fd(obj->maps.accum_readings); 1904 count_map_fd = bpf_map__fd(obj->maps.counts); 1905 if (reading_map_fd < 0 || count_map_fd < 0) { 1906 p_err("failed to get fd for map"); 1907 return; 1908 } 1909 1910 err = bpf_map_lookup_elem(count_map_fd, &key, counts); 1911 if (err) { 1912 p_err("failed to read count_map: %s", strerror(errno)); 1913 return; 1914 } 1915 1916 profile_total_count = 0; 1917 for (cpu = 0; cpu < num_cpu; cpu++) 1918 profile_total_count += counts[cpu]; 1919 1920 for (m = 0; m < ARRAY_SIZE(metrics); m++) { 1921 struct bpf_perf_event_value values[num_cpu]; 1922 1923 if (!metrics[m].selected) 1924 continue; 1925 1926 err = bpf_map_lookup_elem(reading_map_fd, &key, values); 1927 if (err) { 1928 p_err("failed to read reading_map: %s", 1929 strerror(errno)); 1930 return; 1931 } 1932 for (cpu = 0; cpu < num_cpu; cpu++) { 1933 metrics[m].val.counter += values[cpu].counter; 1934 metrics[m].val.enabled += values[cpu].enabled; 1935 metrics[m].val.running += values[cpu].running; 1936 } 1937 key++; 1938 } 1939 } 1940 1941 static void profile_print_readings_json(void) 1942 { 1943 __u32 m; 1944 1945 jsonw_start_array(json_wtr); 1946 for (m = 0; m < ARRAY_SIZE(metrics); m++) { 1947 if (!metrics[m].selected) 1948 continue; 1949 jsonw_start_object(json_wtr); 1950 jsonw_string_field(json_wtr, "metric", metrics[m].name); 1951 jsonw_lluint_field(json_wtr, "run_cnt", profile_total_count); 1952 jsonw_lluint_field(json_wtr, "value", metrics[m].val.counter); 1953 jsonw_lluint_field(json_wtr, "enabled", metrics[m].val.enabled); 1954 jsonw_lluint_field(json_wtr, "running", metrics[m].val.running); 1955 1956 jsonw_end_object(json_wtr); 1957 } 1958 jsonw_end_array(json_wtr); 1959 } 1960 1961 static void profile_print_readings_plain(void) 1962 { 1963 __u32 m; 1964 1965 printf("\n%18llu %-20s\n", profile_total_count, "run_cnt"); 1966 for (m = 0; m < ARRAY_SIZE(metrics); m++) { 1967 struct bpf_perf_event_value *val = &metrics[m].val; 1968 int r; 1969 1970 if (!metrics[m].selected) 1971 continue; 1972 printf("%18llu %-20s", val->counter, metrics[m].name); 1973 1974 r = metrics[m].ratio_metric - 1; 1975 if (r >= 0 && metrics[r].selected && 1976 metrics[r].val.counter > 0) { 1977 printf("# %8.2f %-30s", 1978 val->counter * metrics[m].ratio_mul / 1979 metrics[r].val.counter, 1980 metrics[m].ratio_desc); 1981 } else { 1982 printf("%-41s", ""); 1983 } 1984 1985 if (val->enabled > val->running) 1986 printf("(%4.2f%%)", 1987 val->running * 100.0 / val->enabled); 1988 printf("\n"); 1989 } 1990 } 1991 1992 static void profile_print_readings(void) 1993 { 1994 if (json_output) 1995 profile_print_readings_json(); 1996 else 1997 profile_print_readings_plain(); 1998 } 1999 2000 static char *profile_target_name(int tgt_fd) 2001 { 2002 struct bpf_prog_info_linear *info_linear; 2003 struct bpf_func_info *func_info; 2004 const struct btf_type *t; 2005 char *name = NULL; 2006 struct btf *btf; 2007 2008 info_linear = bpf_program__get_prog_info_linear( 2009 tgt_fd, 1UL << BPF_PROG_INFO_FUNC_INFO); 2010 if (IS_ERR_OR_NULL(info_linear)) { 2011 p_err("failed to get info_linear for prog FD %d", tgt_fd); 2012 return NULL; 2013 } 2014 2015 if (info_linear->info.btf_id == 0 || 2016 btf__get_from_id(info_linear->info.btf_id, &btf)) { 2017 p_err("prog FD %d doesn't have valid btf", tgt_fd); 2018 goto out; 2019 } 2020 2021 func_info = u64_to_ptr(info_linear->info.func_info); 2022 t = btf__type_by_id(btf, func_info[0].type_id); 2023 if (!t) { 2024 p_err("btf %d doesn't have type %d", 2025 info_linear->info.btf_id, func_info[0].type_id); 2026 goto out; 2027 } 2028 name = strdup(btf__name_by_offset(btf, t->name_off)); 2029 out: 2030 free(info_linear); 2031 return name; 2032 } 2033 2034 static struct profiler_bpf *profile_obj; 2035 static int profile_tgt_fd = -1; 2036 static char *profile_tgt_name; 2037 static int *profile_perf_events; 2038 static int profile_perf_event_cnt; 2039 2040 static void profile_close_perf_events(struct profiler_bpf *obj) 2041 { 2042 int i; 2043 2044 for (i = profile_perf_event_cnt - 1; i >= 0; i--) 2045 close(profile_perf_events[i]); 2046 2047 free(profile_perf_events); 2048 profile_perf_event_cnt = 0; 2049 } 2050 2051 static int profile_open_perf_events(struct profiler_bpf *obj) 2052 { 2053 unsigned int cpu, m; 2054 int map_fd, pmu_fd; 2055 2056 profile_perf_events = calloc( 2057 sizeof(int), obj->rodata->num_cpu * obj->rodata->num_metric); 2058 if (!profile_perf_events) { 2059 p_err("failed to allocate memory for perf_event array: %s", 2060 strerror(errno)); 2061 return -1; 2062 } 2063 map_fd = bpf_map__fd(obj->maps.events); 2064 if (map_fd < 0) { 2065 p_err("failed to get fd for events map"); 2066 return -1; 2067 } 2068 2069 for (m = 0; m < ARRAY_SIZE(metrics); m++) { 2070 if (!metrics[m].selected) 2071 continue; 2072 for (cpu = 0; cpu < obj->rodata->num_cpu; cpu++) { 2073 pmu_fd = syscall(__NR_perf_event_open, &metrics[m].attr, 2074 -1/*pid*/, cpu, -1/*group_fd*/, 0); 2075 if (pmu_fd < 0 || 2076 bpf_map_update_elem(map_fd, &profile_perf_event_cnt, 2077 &pmu_fd, BPF_ANY) || 2078 ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0)) { 2079 p_err("failed to create event %s on cpu %d", 2080 metrics[m].name, cpu); 2081 return -1; 2082 } 2083 profile_perf_events[profile_perf_event_cnt++] = pmu_fd; 2084 } 2085 } 2086 return 0; 2087 } 2088 2089 static void profile_print_and_cleanup(void) 2090 { 2091 profile_close_perf_events(profile_obj); 2092 profile_read_values(profile_obj); 2093 profile_print_readings(); 2094 profiler_bpf__destroy(profile_obj); 2095 2096 close(profile_tgt_fd); 2097 free(profile_tgt_name); 2098 } 2099 2100 static void int_exit(int signo) 2101 { 2102 profile_print_and_cleanup(); 2103 exit(0); 2104 } 2105 2106 static int do_profile(int argc, char **argv) 2107 { 2108 int num_metric, num_cpu, err = -1; 2109 struct bpf_program *prog; 2110 unsigned long duration; 2111 char *endptr; 2112 2113 /* we at least need two args for the prog and one metric */ 2114 if (!REQ_ARGS(3)) 2115 return -EINVAL; 2116 2117 /* parse target fd */ 2118 profile_tgt_fd = prog_parse_fd(&argc, &argv); 2119 if (profile_tgt_fd < 0) { 2120 p_err("failed to parse fd"); 2121 return -1; 2122 } 2123 2124 /* parse profiling optional duration */ 2125 if (argc > 2 && is_prefix(argv[0], "duration")) { 2126 NEXT_ARG(); 2127 duration = strtoul(*argv, &endptr, 0); 2128 if (*endptr) 2129 usage(); 2130 NEXT_ARG(); 2131 } else { 2132 duration = UINT_MAX; 2133 } 2134 2135 num_metric = profile_parse_metrics(argc, argv); 2136 if (num_metric <= 0) 2137 goto out; 2138 2139 num_cpu = libbpf_num_possible_cpus(); 2140 if (num_cpu <= 0) { 2141 p_err("failed to identify number of CPUs"); 2142 goto out; 2143 } 2144 2145 profile_obj = profiler_bpf__open(); 2146 if (!profile_obj) { 2147 p_err("failed to open and/or load BPF object"); 2148 goto out; 2149 } 2150 2151 profile_obj->rodata->num_cpu = num_cpu; 2152 profile_obj->rodata->num_metric = num_metric; 2153 2154 /* adjust map sizes */ 2155 bpf_map__resize(profile_obj->maps.events, num_metric * num_cpu); 2156 bpf_map__resize(profile_obj->maps.fentry_readings, num_metric); 2157 bpf_map__resize(profile_obj->maps.accum_readings, num_metric); 2158 bpf_map__resize(profile_obj->maps.counts, 1); 2159 2160 /* change target name */ 2161 profile_tgt_name = profile_target_name(profile_tgt_fd); 2162 if (!profile_tgt_name) 2163 goto out; 2164 2165 bpf_object__for_each_program(prog, profile_obj->obj) { 2166 err = bpf_program__set_attach_target(prog, profile_tgt_fd, 2167 profile_tgt_name); 2168 if (err) { 2169 p_err("failed to set attach target\n"); 2170 goto out; 2171 } 2172 } 2173 2174 set_max_rlimit(); 2175 err = profiler_bpf__load(profile_obj); 2176 if (err) { 2177 p_err("failed to load profile_obj"); 2178 goto out; 2179 } 2180 2181 err = profile_open_perf_events(profile_obj); 2182 if (err) 2183 goto out; 2184 2185 err = profiler_bpf__attach(profile_obj); 2186 if (err) { 2187 p_err("failed to attach profile_obj"); 2188 goto out; 2189 } 2190 signal(SIGINT, int_exit); 2191 2192 sleep(duration); 2193 profile_print_and_cleanup(); 2194 return 0; 2195 2196 out: 2197 profile_close_perf_events(profile_obj); 2198 if (profile_obj) 2199 profiler_bpf__destroy(profile_obj); 2200 close(profile_tgt_fd); 2201 free(profile_tgt_name); 2202 return err; 2203 } 2204 2205 #endif /* BPFTOOL_WITHOUT_SKELETONS */ 2206 2207 static int do_help(int argc, char **argv) 2208 { 2209 if (json_output) { 2210 jsonw_null(json_wtr); 2211 return 0; 2212 } 2213 2214 fprintf(stderr, 2215 "Usage: %1$s %2$s { show | list } [PROG]\n" 2216 " %1$s %2$s dump xlated PROG [{ file FILE | opcodes | visual | linum }]\n" 2217 " %1$s %2$s dump jited PROG [{ file FILE | opcodes | linum }]\n" 2218 " %1$s %2$s pin PROG FILE\n" 2219 " %1$s %2$s { load | loadall } OBJ PATH \\\n" 2220 " [type TYPE] [dev NAME] \\\n" 2221 " [map { idx IDX | name NAME } MAP]\\\n" 2222 " [pinmaps MAP_DIR]\n" 2223 " %1$s %2$s attach PROG ATTACH_TYPE [MAP]\n" 2224 " %1$s %2$s detach PROG ATTACH_TYPE [MAP]\n" 2225 " %1$s %2$s run PROG \\\n" 2226 " data_in FILE \\\n" 2227 " [data_out FILE [data_size_out L]] \\\n" 2228 " [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n" 2229 " [repeat N]\n" 2230 " %1$s %2$s profile PROG [duration DURATION] METRICs\n" 2231 " %1$s %2$s tracelog\n" 2232 " %1$s %2$s help\n" 2233 "\n" 2234 " " HELP_SPEC_MAP "\n" 2235 " " HELP_SPEC_PROGRAM "\n" 2236 " TYPE := { socket | kprobe | kretprobe | classifier | action |\n" 2237 " tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n" 2238 " cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n" 2239 " lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n" 2240 " sk_reuseport | flow_dissector | cgroup/sysctl |\n" 2241 " cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n" 2242 " cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n" 2243 " cgroup/getpeername4 | cgroup/getpeername6 |\n" 2244 " cgroup/getsockname4 | cgroup/getsockname6 | cgroup/sendmsg4 |\n" 2245 " cgroup/sendmsg6 | cgroup/recvmsg4 | cgroup/recvmsg6 |\n" 2246 " cgroup/getsockopt | cgroup/setsockopt | cgroup/sock_release |\n" 2247 " struct_ops | fentry | fexit | freplace | sk_lookup }\n" 2248 " ATTACH_TYPE := { msg_verdict | stream_verdict | stream_parser |\n" 2249 " flow_dissector }\n" 2250 " METRIC := { cycles | instructions | l1d_loads | llc_misses | itlb_misses | dtlb_misses }\n" 2251 " " HELP_SPEC_OPTIONS "\n" 2252 "", 2253 bin_name, argv[-2]); 2254 2255 return 0; 2256 } 2257 2258 static const struct cmd cmds[] = { 2259 { "show", do_show }, 2260 { "list", do_show }, 2261 { "help", do_help }, 2262 { "dump", do_dump }, 2263 { "pin", do_pin }, 2264 { "load", do_load }, 2265 { "loadall", do_loadall }, 2266 { "attach", do_attach }, 2267 { "detach", do_detach }, 2268 { "tracelog", do_tracelog }, 2269 { "run", do_run }, 2270 { "profile", do_profile }, 2271 { 0 } 2272 }; 2273 2274 int do_prog(int argc, char **argv) 2275 { 2276 return cmd_select(cmds, argc, argv, do_help); 2277 } 2278