2527 lines · c
1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)2/* Copyright (C) 2017-2018 Netronome Systems, Inc. */3 4#ifndef _GNU_SOURCE5#define _GNU_SOURCE6#endif7#include <errno.h>8#include <fcntl.h>9#include <signal.h>10#include <stdarg.h>11#include <stdio.h>12#include <stdlib.h>13#include <string.h>14#include <time.h>15#include <unistd.h>16#include <net/if.h>17#include <sys/ioctl.h>18#include <sys/types.h>19#include <sys/stat.h>20#include <sys/syscall.h>21#include <dirent.h>22 23#include <linux/err.h>24#include <linux/perf_event.h>25#include <linux/sizes.h>26 27#include <bpf/bpf.h>28#include <bpf/btf.h>29#include <bpf/hashmap.h>30#include <bpf/libbpf.h>31#include <bpf/libbpf_internal.h>32#include <bpf/skel_internal.h>33 34#include "cfg.h"35#include "main.h"36#include "xlated_dumper.h"37 38#define BPF_METADATA_PREFIX "bpf_metadata_"39#define BPF_METADATA_PREFIX_LEN (sizeof(BPF_METADATA_PREFIX) - 1)40 41enum dump_mode {42 DUMP_JITED,43 DUMP_XLATED,44};45 46static const bool attach_types[] = {47 [BPF_SK_SKB_STREAM_PARSER] = true,48 [BPF_SK_SKB_STREAM_VERDICT] = true,49 [BPF_SK_SKB_VERDICT] = true,50 [BPF_SK_MSG_VERDICT] = true,51 [BPF_FLOW_DISSECTOR] = true,52 [__MAX_BPF_ATTACH_TYPE] = false,53};54 55/* Textual representations traditionally used by the program and kept around56 * for the sake of backwards compatibility.57 */58static const char * const attach_type_strings[] = {59 [BPF_SK_SKB_STREAM_PARSER] = "stream_parser",60 [BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict",61 [BPF_SK_SKB_VERDICT] = "skb_verdict",62 [BPF_SK_MSG_VERDICT] = "msg_verdict",63 [__MAX_BPF_ATTACH_TYPE] = NULL,64};65 66static struct hashmap *prog_table;67 68static enum bpf_attach_type parse_attach_type(const char *str)69{70 enum bpf_attach_type type;71 72 for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) {73 if (attach_types[type]) {74 const char *attach_type_str;75 76 attach_type_str = libbpf_bpf_attach_type_str(type);77 if (!strcmp(str, attach_type_str))78 return type;79 }80 81 if (attach_type_strings[type] &&82 is_prefix(str, attach_type_strings[type]))83 return type;84 }85 86 return __MAX_BPF_ATTACH_TYPE;87}88 89static int prep_prog_info(struct bpf_prog_info *const info, enum dump_mode mode,90 void **info_data, size_t *const info_data_sz)91{92 struct bpf_prog_info holder = {};93 size_t needed = 0;94 void *ptr;95 96 if (mode == DUMP_JITED) {97 holder.jited_prog_len = info->jited_prog_len;98 needed += info->jited_prog_len;99 } else {100 holder.xlated_prog_len = info->xlated_prog_len;101 needed += info->xlated_prog_len;102 }103 104 holder.nr_jited_ksyms = info->nr_jited_ksyms;105 needed += info->nr_jited_ksyms * sizeof(__u64);106 107 holder.nr_jited_func_lens = info->nr_jited_func_lens;108 needed += info->nr_jited_func_lens * sizeof(__u32);109 110 holder.nr_func_info = info->nr_func_info;111 holder.func_info_rec_size = info->func_info_rec_size;112 needed += info->nr_func_info * info->func_info_rec_size;113 114 holder.nr_line_info = info->nr_line_info;115 holder.line_info_rec_size = info->line_info_rec_size;116 needed += info->nr_line_info * info->line_info_rec_size;117 118 holder.nr_jited_line_info = info->nr_jited_line_info;119 holder.jited_line_info_rec_size = info->jited_line_info_rec_size;120 needed += info->nr_jited_line_info * info->jited_line_info_rec_size;121 122 if (needed > *info_data_sz) {123 ptr = realloc(*info_data, needed);124 if (!ptr)125 return -1;126 127 *info_data = ptr;128 *info_data_sz = needed;129 }130 ptr = *info_data;131 132 if (mode == DUMP_JITED) {133 holder.jited_prog_insns = ptr_to_u64(ptr);134 ptr += holder.jited_prog_len;135 } else {136 holder.xlated_prog_insns = ptr_to_u64(ptr);137 ptr += holder.xlated_prog_len;138 }139 140 holder.jited_ksyms = ptr_to_u64(ptr);141 ptr += holder.nr_jited_ksyms * sizeof(__u64);142 143 holder.jited_func_lens = ptr_to_u64(ptr);144 ptr += holder.nr_jited_func_lens * sizeof(__u32);145 146 holder.func_info = ptr_to_u64(ptr);147 ptr += holder.nr_func_info * holder.func_info_rec_size;148 149 holder.line_info = ptr_to_u64(ptr);150 ptr += holder.nr_line_info * holder.line_info_rec_size;151 152 holder.jited_line_info = ptr_to_u64(ptr);153 ptr += holder.nr_jited_line_info * holder.jited_line_info_rec_size;154 155 *info = holder;156 return 0;157}158 159static void print_boot_time(__u64 nsecs, char *buf, unsigned int size)160{161 struct timespec real_time_ts, boot_time_ts;162 time_t wallclock_secs;163 struct tm load_tm;164 165 buf[--size] = '\0';166 167 if (clock_gettime(CLOCK_REALTIME, &real_time_ts) ||168 clock_gettime(CLOCK_BOOTTIME, &boot_time_ts)) {169 perror("Can't read clocks");170 snprintf(buf, size, "%llu", nsecs / 1000000000);171 return;172 }173 174 wallclock_secs = (real_time_ts.tv_sec - boot_time_ts.tv_sec) +175 (real_time_ts.tv_nsec - boot_time_ts.tv_nsec + nsecs) /176 1000000000;177 178 179 if (!localtime_r(&wallclock_secs, &load_tm)) {180 snprintf(buf, size, "%llu", nsecs / 1000000000);181 return;182 }183 184 if (json_output)185 strftime(buf, size, "%s", &load_tm);186 else187 strftime(buf, size, "%FT%T%z", &load_tm);188}189 190static void show_prog_maps(int fd, __u32 num_maps)191{192 struct bpf_prog_info info = {};193 __u32 len = sizeof(info);194 __u32 map_ids[num_maps];195 unsigned int i;196 int err;197 198 info.nr_map_ids = num_maps;199 info.map_ids = ptr_to_u64(map_ids);200 201 err = bpf_prog_get_info_by_fd(fd, &info, &len);202 if (err || !info.nr_map_ids)203 return;204 205 if (json_output) {206 jsonw_name(json_wtr, "map_ids");207 jsonw_start_array(json_wtr);208 for (i = 0; i < info.nr_map_ids; i++)209 jsonw_uint(json_wtr, map_ids[i]);210 jsonw_end_array(json_wtr);211 } else {212 printf(" map_ids ");213 for (i = 0; i < info.nr_map_ids; i++)214 printf("%u%s", map_ids[i],215 i == info.nr_map_ids - 1 ? "" : ",");216 }217}218 219static void *find_metadata(int prog_fd, struct bpf_map_info *map_info)220{221 struct bpf_prog_info prog_info;222 __u32 prog_info_len;223 __u32 map_info_len;224 void *value = NULL;225 __u32 *map_ids;226 int nr_maps;227 int key = 0;228 int map_fd;229 int ret;230 __u32 i;231 232 memset(&prog_info, 0, sizeof(prog_info));233 prog_info_len = sizeof(prog_info);234 ret = bpf_prog_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);235 if (ret)236 return NULL;237 238 if (!prog_info.nr_map_ids)239 return NULL;240 241 map_ids = calloc(prog_info.nr_map_ids, sizeof(__u32));242 if (!map_ids)243 return NULL;244 245 nr_maps = prog_info.nr_map_ids;246 memset(&prog_info, 0, sizeof(prog_info));247 prog_info.nr_map_ids = nr_maps;248 prog_info.map_ids = ptr_to_u64(map_ids);249 prog_info_len = sizeof(prog_info);250 251 ret = bpf_prog_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);252 if (ret)253 goto free_map_ids;254 255 for (i = 0; i < prog_info.nr_map_ids; i++) {256 map_fd = bpf_map_get_fd_by_id(map_ids[i]);257 if (map_fd < 0)258 goto free_map_ids;259 260 memset(map_info, 0, sizeof(*map_info));261 map_info_len = sizeof(*map_info);262 ret = bpf_map_get_info_by_fd(map_fd, map_info, &map_info_len);263 if (ret < 0) {264 close(map_fd);265 goto free_map_ids;266 }267 268 if (map_info->type != BPF_MAP_TYPE_ARRAY ||269 map_info->key_size != sizeof(int) ||270 map_info->max_entries != 1 ||271 !map_info->btf_value_type_id ||272 !strstr(map_info->name, ".rodata")) {273 close(map_fd);274 continue;275 }276 277 value = malloc(map_info->value_size);278 if (!value) {279 close(map_fd);280 goto free_map_ids;281 }282 283 if (bpf_map_lookup_elem(map_fd, &key, value)) {284 close(map_fd);285 free(value);286 value = NULL;287 goto free_map_ids;288 }289 290 close(map_fd);291 break;292 }293 294free_map_ids:295 free(map_ids);296 return value;297}298 299static bool has_metadata_prefix(const char *s)300{301 return strncmp(s, BPF_METADATA_PREFIX, BPF_METADATA_PREFIX_LEN) == 0;302}303 304static void show_prog_metadata(int fd, __u32 num_maps)305{306 const struct btf_type *t_datasec, *t_var;307 struct bpf_map_info map_info;308 struct btf_var_secinfo *vsi;309 bool printed_header = false;310 unsigned int i, vlen;311 void *value = NULL;312 const char *name;313 struct btf *btf;314 int err;315 316 if (!num_maps)317 return;318 319 memset(&map_info, 0, sizeof(map_info));320 value = find_metadata(fd, &map_info);321 if (!value)322 return;323 324 btf = btf__load_from_kernel_by_id(map_info.btf_id);325 if (!btf)326 goto out_free;327 328 t_datasec = btf__type_by_id(btf, map_info.btf_value_type_id);329 if (!btf_is_datasec(t_datasec))330 goto out_free;331 332 vlen = btf_vlen(t_datasec);333 vsi = btf_var_secinfos(t_datasec);334 335 /* We don't proceed to check the kinds of the elements of the DATASEC.336 * The verifier enforces them to be BTF_KIND_VAR.337 */338 339 if (json_output) {340 struct btf_dumper d = {341 .btf = btf,342 .jw = json_wtr,343 .is_plain_text = false,344 };345 346 for (i = 0; i < vlen; i++, vsi++) {347 t_var = btf__type_by_id(btf, vsi->type);348 name = btf__name_by_offset(btf, t_var->name_off);349 350 if (!has_metadata_prefix(name))351 continue;352 353 if (!printed_header) {354 jsonw_name(json_wtr, "metadata");355 jsonw_start_object(json_wtr);356 printed_header = true;357 }358 359 jsonw_name(json_wtr, name + BPF_METADATA_PREFIX_LEN);360 err = btf_dumper_type(&d, t_var->type, value + vsi->offset);361 if (err) {362 p_err("btf dump failed: %d", err);363 break;364 }365 }366 if (printed_header)367 jsonw_end_object(json_wtr);368 } else {369 json_writer_t *btf_wtr;370 struct btf_dumper d = {371 .btf = btf,372 .is_plain_text = true,373 };374 375 for (i = 0; i < vlen; i++, vsi++) {376 t_var = btf__type_by_id(btf, vsi->type);377 name = btf__name_by_offset(btf, t_var->name_off);378 379 if (!has_metadata_prefix(name))380 continue;381 382 if (!printed_header) {383 printf("\tmetadata:");384 385 btf_wtr = jsonw_new(stdout);386 if (!btf_wtr) {387 p_err("jsonw alloc failed");388 goto out_free;389 }390 d.jw = btf_wtr,391 392 printed_header = true;393 }394 395 printf("\n\t\t%s = ", name + BPF_METADATA_PREFIX_LEN);396 397 jsonw_reset(btf_wtr);398 err = btf_dumper_type(&d, t_var->type, value + vsi->offset);399 if (err) {400 p_err("btf dump failed: %d", err);401 break;402 }403 }404 if (printed_header)405 jsonw_destroy(&btf_wtr);406 }407 408out_free:409 btf__free(btf);410 free(value);411}412 413static void print_prog_header_json(struct bpf_prog_info *info, int fd)414{415 const char *prog_type_str;416 char prog_name[MAX_PROG_FULL_NAME];417 418 jsonw_uint_field(json_wtr, "id", info->id);419 prog_type_str = libbpf_bpf_prog_type_str(info->type);420 421 if (prog_type_str)422 jsonw_string_field(json_wtr, "type", prog_type_str);423 else424 jsonw_uint_field(json_wtr, "type", info->type);425 426 if (*info->name) {427 get_prog_full_name(info, fd, prog_name, sizeof(prog_name));428 jsonw_string_field(json_wtr, "name", prog_name);429 }430 431 jsonw_name(json_wtr, "tag");432 jsonw_printf(json_wtr, "\"" BPF_TAG_FMT "\"",433 info->tag[0], info->tag[1], info->tag[2], info->tag[3],434 info->tag[4], info->tag[5], info->tag[6], info->tag[7]);435 436 jsonw_bool_field(json_wtr, "gpl_compatible", info->gpl_compatible);437 if (info->run_time_ns) {438 jsonw_uint_field(json_wtr, "run_time_ns", info->run_time_ns);439 jsonw_uint_field(json_wtr, "run_cnt", info->run_cnt);440 }441 if (info->recursion_misses)442 jsonw_uint_field(json_wtr, "recursion_misses", info->recursion_misses);443}444 445static void print_prog_json(struct bpf_prog_info *info, int fd, bool orphaned)446{447 char *memlock;448 449 jsonw_start_object(json_wtr);450 print_prog_header_json(info, fd);451 print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);452 453 if (info->load_time) {454 char buf[32];455 456 print_boot_time(info->load_time, buf, sizeof(buf));457 458 /* Piggy back on load_time, since 0 uid is a valid one */459 jsonw_name(json_wtr, "loaded_at");460 jsonw_printf(json_wtr, "%s", buf);461 jsonw_uint_field(json_wtr, "uid", info->created_by_uid);462 }463 464 jsonw_bool_field(json_wtr, "orphaned", orphaned);465 jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len);466 467 if (info->jited_prog_len) {468 jsonw_bool_field(json_wtr, "jited", true);469 jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len);470 } else {471 jsonw_bool_field(json_wtr, "jited", false);472 }473 474 memlock = get_fdinfo(fd, "memlock");475 if (memlock)476 jsonw_int_field(json_wtr, "bytes_memlock", atoll(memlock));477 free(memlock);478 479 if (info->nr_map_ids)480 show_prog_maps(fd, info->nr_map_ids);481 482 if (info->btf_id)483 jsonw_int_field(json_wtr, "btf_id", info->btf_id);484 485 if (!hashmap__empty(prog_table)) {486 struct hashmap_entry *entry;487 488 jsonw_name(json_wtr, "pinned");489 jsonw_start_array(json_wtr);490 hashmap__for_each_key_entry(prog_table, entry, info->id)491 jsonw_string(json_wtr, entry->pvalue);492 jsonw_end_array(json_wtr);493 }494 495 emit_obj_refs_json(refs_table, info->id, json_wtr);496 497 show_prog_metadata(fd, info->nr_map_ids);498 499 jsonw_end_object(json_wtr);500}501 502static void print_prog_header_plain(struct bpf_prog_info *info, int fd)503{504 const char *prog_type_str;505 char prog_name[MAX_PROG_FULL_NAME];506 507 printf("%u: ", info->id);508 prog_type_str = libbpf_bpf_prog_type_str(info->type);509 if (prog_type_str)510 printf("%s ", prog_type_str);511 else512 printf("type %u ", info->type);513 514 if (*info->name) {515 get_prog_full_name(info, fd, prog_name, sizeof(prog_name));516 printf("name %s ", prog_name);517 }518 519 printf("tag ");520 fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");521 print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);522 printf("%s", info->gpl_compatible ? " gpl" : "");523 if (info->run_time_ns)524 printf(" run_time_ns %lld run_cnt %lld",525 info->run_time_ns, info->run_cnt);526 if (info->recursion_misses)527 printf(" recursion_misses %lld", info->recursion_misses);528 printf("\n");529}530 531static void print_prog_plain(struct bpf_prog_info *info, int fd, bool orphaned)532{533 char *memlock;534 535 print_prog_header_plain(info, fd);536 537 if (info->load_time) {538 char buf[32];539 540 print_boot_time(info->load_time, buf, sizeof(buf));541 542 /* Piggy back on load_time, since 0 uid is a valid one */543 printf("\tloaded_at %s uid %u\n", buf, info->created_by_uid);544 }545 546 printf("\txlated %uB", info->xlated_prog_len);547 548 if (info->jited_prog_len)549 printf(" jited %uB", info->jited_prog_len);550 else551 printf(" not jited");552 553 memlock = get_fdinfo(fd, "memlock");554 if (memlock)555 printf(" memlock %sB", memlock);556 free(memlock);557 558 if (orphaned)559 printf(" orphaned");560 561 if (info->nr_map_ids)562 show_prog_maps(fd, info->nr_map_ids);563 564 if (!hashmap__empty(prog_table)) {565 struct hashmap_entry *entry;566 567 hashmap__for_each_key_entry(prog_table, entry, info->id)568 printf("\n\tpinned %s", (char *)entry->pvalue);569 }570 571 if (info->btf_id)572 printf("\n\tbtf_id %d", info->btf_id);573 574 emit_obj_refs_plain(refs_table, info->id, "\n\tpids ");575 576 printf("\n");577 578 show_prog_metadata(fd, info->nr_map_ids);579}580 581static int show_prog(int fd)582{583 struct bpf_prog_info info = {};584 __u32 len = sizeof(info);585 int err;586 587 err = bpf_prog_get_info_by_fd(fd, &info, &len);588 if (err && err != -ENODEV) {589 p_err("can't get prog info: %s", strerror(errno));590 return -1;591 }592 593 if (json_output)594 print_prog_json(&info, fd, err == -ENODEV);595 else596 print_prog_plain(&info, fd, err == -ENODEV);597 598 return 0;599}600 601static int do_show_subset(int argc, char **argv)602{603 int *fds = NULL;604 int nb_fds, i;605 int err = -1;606 607 fds = malloc(sizeof(int));608 if (!fds) {609 p_err("mem alloc failed");610 return -1;611 }612 nb_fds = prog_parse_fds(&argc, &argv, &fds);613 if (nb_fds < 1)614 goto exit_free;615 616 if (json_output && nb_fds > 1)617 jsonw_start_array(json_wtr); /* root array */618 for (i = 0; i < nb_fds; i++) {619 err = show_prog(fds[i]);620 if (err) {621 for (; i < nb_fds; i++)622 close(fds[i]);623 break;624 }625 close(fds[i]);626 }627 if (json_output && nb_fds > 1)628 jsonw_end_array(json_wtr); /* root array */629 630exit_free:631 free(fds);632 return err;633}634 635static int do_show(int argc, char **argv)636{637 __u32 id = 0;638 int err;639 int fd;640 641 if (show_pinned) {642 prog_table = hashmap__new(hash_fn_for_key_as_id,643 equal_fn_for_key_as_id, NULL);644 if (IS_ERR(prog_table)) {645 p_err("failed to create hashmap for pinned paths");646 return -1;647 }648 build_pinned_obj_table(prog_table, BPF_OBJ_PROG);649 }650 build_obj_refs_table(&refs_table, BPF_OBJ_PROG);651 652 if (argc == 2)653 return do_show_subset(argc, argv);654 655 if (argc)656 return BAD_ARG();657 658 if (json_output)659 jsonw_start_array(json_wtr);660 while (true) {661 err = bpf_prog_get_next_id(id, &id);662 if (err) {663 if (errno == ENOENT) {664 err = 0;665 break;666 }667 p_err("can't get next program: %s%s", strerror(errno),668 errno == EINVAL ? " -- kernel too old?" : "");669 err = -1;670 break;671 }672 673 fd = bpf_prog_get_fd_by_id(id);674 if (fd < 0) {675 if (errno == ENOENT)676 continue;677 p_err("can't get prog by id (%u): %s",678 id, strerror(errno));679 err = -1;680 break;681 }682 683 err = show_prog(fd);684 close(fd);685 if (err)686 break;687 }688 689 if (json_output)690 jsonw_end_array(json_wtr);691 692 delete_obj_refs_table(refs_table);693 694 if (show_pinned)695 delete_pinned_obj_table(prog_table);696 697 return err;698}699 700static int701prog_dump(struct bpf_prog_info *info, enum dump_mode mode,702 char *filepath, bool opcodes, bool visual, bool linum)703{704 struct bpf_prog_linfo *prog_linfo = NULL;705 const char *disasm_opt = NULL;706 struct dump_data dd = {};707 void *func_info = NULL;708 struct btf *btf = NULL;709 char func_sig[1024];710 unsigned char *buf;711 __u32 member_len;712 int fd, err = -1;713 ssize_t n;714 715 if (mode == DUMP_JITED) {716 if (info->jited_prog_len == 0 || !info->jited_prog_insns) {717 p_info("no instructions returned");718 return -1;719 }720 buf = u64_to_ptr(info->jited_prog_insns);721 member_len = info->jited_prog_len;722 } else { /* DUMP_XLATED */723 if (info->xlated_prog_len == 0 || !info->xlated_prog_insns) {724 p_err("error retrieving insn dump: kernel.kptr_restrict set?");725 return -1;726 }727 buf = u64_to_ptr(info->xlated_prog_insns);728 member_len = info->xlated_prog_len;729 }730 731 if (info->btf_id) {732 btf = btf__load_from_kernel_by_id(info->btf_id);733 if (!btf) {734 p_err("failed to get btf");735 return -1;736 }737 }738 739 func_info = u64_to_ptr(info->func_info);740 741 if (info->nr_line_info) {742 prog_linfo = bpf_prog_linfo__new(info);743 if (!prog_linfo)744 p_info("error in processing bpf_line_info. continue without it.");745 }746 747 if (filepath) {748 fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600);749 if (fd < 0) {750 p_err("can't open file %s: %s", filepath,751 strerror(errno));752 goto exit_free;753 }754 755 n = write(fd, buf, member_len);756 close(fd);757 if (n != (ssize_t)member_len) {758 p_err("error writing output file: %s",759 n < 0 ? strerror(errno) : "short write");760 goto exit_free;761 }762 763 if (json_output)764 jsonw_null(json_wtr);765 } else if (mode == DUMP_JITED) {766 const char *name = NULL;767 768 if (info->ifindex) {769 name = ifindex_to_arch(info->ifindex, info->netns_dev,770 info->netns_ino, &disasm_opt);771 if (!name)772 goto exit_free;773 }774 775 if (info->nr_jited_func_lens && info->jited_func_lens) {776 struct kernel_sym *sym = NULL;777 struct bpf_func_info *record;778 char sym_name[SYM_MAX_NAME];779 unsigned char *img = buf;780 __u64 *ksyms = NULL;781 __u32 *lens;782 __u32 i;783 if (info->nr_jited_ksyms) {784 kernel_syms_load(&dd);785 ksyms = u64_to_ptr(info->jited_ksyms);786 }787 788 if (json_output)789 jsonw_start_array(json_wtr);790 791 lens = u64_to_ptr(info->jited_func_lens);792 for (i = 0; i < info->nr_jited_func_lens; i++) {793 if (ksyms) {794 sym = kernel_syms_search(&dd, ksyms[i]);795 if (sym)796 sprintf(sym_name, "%s", sym->name);797 else798 sprintf(sym_name, "0x%016llx", ksyms[i]);799 } else {800 strcpy(sym_name, "unknown");801 }802 803 if (func_info) {804 record = func_info + i * info->func_info_rec_size;805 btf_dumper_type_only(btf, record->type_id,806 func_sig,807 sizeof(func_sig));808 }809 810 if (json_output) {811 jsonw_start_object(json_wtr);812 if (func_info && func_sig[0] != '\0') {813 jsonw_name(json_wtr, "proto");814 jsonw_string(json_wtr, func_sig);815 }816 jsonw_name(json_wtr, "name");817 jsonw_string(json_wtr, sym_name);818 jsonw_name(json_wtr, "insns");819 } else {820 if (func_info && func_sig[0] != '\0')821 printf("%s:\n", func_sig);822 printf("%s:\n", sym_name);823 }824 825 if (disasm_print_insn(img, lens[i], opcodes,826 name, disasm_opt, btf,827 prog_linfo, ksyms[i], i,828 linum))829 goto exit_free;830 831 img += lens[i];832 833 if (json_output)834 jsonw_end_object(json_wtr);835 else836 printf("\n");837 }838 839 if (json_output)840 jsonw_end_array(json_wtr);841 } else {842 if (disasm_print_insn(buf, member_len, opcodes, name,843 disasm_opt, btf, NULL, 0, 0,844 false))845 goto exit_free;846 }847 } else {848 kernel_syms_load(&dd);849 dd.nr_jited_ksyms = info->nr_jited_ksyms;850 dd.jited_ksyms = u64_to_ptr(info->jited_ksyms);851 dd.btf = btf;852 dd.func_info = func_info;853 dd.finfo_rec_size = info->func_info_rec_size;854 dd.prog_linfo = prog_linfo;855 856 if (json_output)857 dump_xlated_json(&dd, buf, member_len, opcodes, linum);858 else if (visual)859 dump_xlated_cfg(&dd, buf, member_len, opcodes, linum);860 else861 dump_xlated_plain(&dd, buf, member_len, opcodes, linum);862 kernel_syms_destroy(&dd);863 }864 865 err = 0;866 867exit_free:868 btf__free(btf);869 bpf_prog_linfo__free(prog_linfo);870 return err;871}872 873static int do_dump(int argc, char **argv)874{875 struct bpf_prog_info info;876 __u32 info_len = sizeof(info);877 size_t info_data_sz = 0;878 void *info_data = NULL;879 char *filepath = NULL;880 bool opcodes = false;881 bool visual = false;882 enum dump_mode mode;883 bool linum = false;884 int nb_fds, i = 0;885 int *fds = NULL;886 int err = -1;887 888 if (is_prefix(*argv, "jited")) {889 if (disasm_init())890 return -1;891 mode = DUMP_JITED;892 } else if (is_prefix(*argv, "xlated")) {893 mode = DUMP_XLATED;894 } else {895 p_err("expected 'xlated' or 'jited', got: %s", *argv);896 return -1;897 }898 NEXT_ARG();899 900 if (argc < 2)901 usage();902 903 fds = malloc(sizeof(int));904 if (!fds) {905 p_err("mem alloc failed");906 return -1;907 }908 nb_fds = prog_parse_fds(&argc, &argv, &fds);909 if (nb_fds < 1)910 goto exit_free;911 912 while (argc) {913 if (is_prefix(*argv, "file")) {914 NEXT_ARG();915 if (!argc) {916 p_err("expected file path");917 goto exit_close;918 }919 if (nb_fds > 1) {920 p_err("several programs matched");921 goto exit_close;922 }923 924 filepath = *argv;925 NEXT_ARG();926 } else if (is_prefix(*argv, "opcodes")) {927 opcodes = true;928 NEXT_ARG();929 } else if (is_prefix(*argv, "visual")) {930 if (nb_fds > 1) {931 p_err("several programs matched");932 goto exit_close;933 }934 935 visual = true;936 NEXT_ARG();937 } else if (is_prefix(*argv, "linum")) {938 linum = true;939 NEXT_ARG();940 } else {941 usage();942 goto exit_close;943 }944 }945 946 if (filepath && (opcodes || visual || linum)) {947 p_err("'file' is not compatible with 'opcodes', 'visual', or 'linum'");948 goto exit_close;949 }950 if (json_output && visual) {951 p_err("'visual' is not compatible with JSON output");952 goto exit_close;953 }954 955 if (json_output && nb_fds > 1)956 jsonw_start_array(json_wtr); /* root array */957 for (i = 0; i < nb_fds; i++) {958 memset(&info, 0, sizeof(info));959 960 err = bpf_prog_get_info_by_fd(fds[i], &info, &info_len);961 if (err) {962 p_err("can't get prog info: %s", strerror(errno));963 break;964 }965 966 err = prep_prog_info(&info, mode, &info_data, &info_data_sz);967 if (err) {968 p_err("can't grow prog info_data");969 break;970 }971 972 err = bpf_prog_get_info_by_fd(fds[i], &info, &info_len);973 if (err) {974 p_err("can't get prog info: %s", strerror(errno));975 break;976 }977 978 if (json_output && nb_fds > 1) {979 jsonw_start_object(json_wtr); /* prog object */980 print_prog_header_json(&info, fds[i]);981 jsonw_name(json_wtr, "insns");982 } else if (nb_fds > 1) {983 print_prog_header_plain(&info, fds[i]);984 }985 986 err = prog_dump(&info, mode, filepath, opcodes, visual, linum);987 988 if (json_output && nb_fds > 1)989 jsonw_end_object(json_wtr); /* prog object */990 else if (i != nb_fds - 1 && nb_fds > 1)991 printf("\n");992 993 if (err)994 break;995 close(fds[i]);996 }997 if (json_output && nb_fds > 1)998 jsonw_end_array(json_wtr); /* root array */999 1000exit_close:1001 for (; i < nb_fds; i++)1002 close(fds[i]);1003exit_free:1004 free(info_data);1005 free(fds);1006 return err;1007}1008 1009static int do_pin(int argc, char **argv)1010{1011 int err;1012 1013 err = do_pin_any(argc, argv, prog_parse_fd);1014 if (!err && json_output)1015 jsonw_null(json_wtr);1016 return err;1017}1018 1019struct map_replace {1020 int idx;1021 int fd;1022 char *name;1023};1024 1025static int map_replace_compar(const void *p1, const void *p2)1026{1027 const struct map_replace *a = p1, *b = p2;1028 1029 return a->idx - b->idx;1030}1031 1032static int parse_attach_detach_args(int argc, char **argv, int *progfd,1033 enum bpf_attach_type *attach_type,1034 int *mapfd)1035{1036 if (!REQ_ARGS(3))1037 return -EINVAL;1038 1039 *progfd = prog_parse_fd(&argc, &argv);1040 if (*progfd < 0)1041 return *progfd;1042 1043 *attach_type = parse_attach_type(*argv);1044 if (*attach_type == __MAX_BPF_ATTACH_TYPE) {1045 p_err("invalid attach/detach type");1046 return -EINVAL;1047 }1048 1049 if (*attach_type == BPF_FLOW_DISSECTOR) {1050 *mapfd = 0;1051 return 0;1052 }1053 1054 NEXT_ARG();1055 if (!REQ_ARGS(2))1056 return -EINVAL;1057 1058 *mapfd = map_parse_fd(&argc, &argv);1059 if (*mapfd < 0)1060 return *mapfd;1061 1062 return 0;1063}1064 1065static int do_attach(int argc, char **argv)1066{1067 enum bpf_attach_type attach_type;1068 int err, progfd;1069 int mapfd;1070 1071 err = parse_attach_detach_args(argc, argv,1072 &progfd, &attach_type, &mapfd);1073 if (err)1074 return err;1075 1076 err = bpf_prog_attach(progfd, mapfd, attach_type, 0);1077 if (err) {1078 p_err("failed prog attach to map");1079 return -EINVAL;1080 }1081 1082 if (json_output)1083 jsonw_null(json_wtr);1084 return 0;1085}1086 1087static int do_detach(int argc, char **argv)1088{1089 enum bpf_attach_type attach_type;1090 int err, progfd;1091 int mapfd;1092 1093 err = parse_attach_detach_args(argc, argv,1094 &progfd, &attach_type, &mapfd);1095 if (err)1096 return err;1097 1098 err = bpf_prog_detach2(progfd, mapfd, attach_type);1099 if (err) {1100 p_err("failed prog detach from map");1101 return -EINVAL;1102 }1103 1104 if (json_output)1105 jsonw_null(json_wtr);1106 return 0;1107}1108 1109static int check_single_stdin(char *file_data_in, char *file_ctx_in)1110{1111 if (file_data_in && file_ctx_in &&1112 !strcmp(file_data_in, "-") && !strcmp(file_ctx_in, "-")) {1113 p_err("cannot use standard input for both data_in and ctx_in");1114 return -1;1115 }1116 1117 return 0;1118}1119 1120static int get_run_data(const char *fname, void **data_ptr, unsigned int *size)1121{1122 size_t block_size = 256;1123 size_t buf_size = block_size;1124 size_t nb_read = 0;1125 void *tmp;1126 FILE *f;1127 1128 if (!fname) {1129 *data_ptr = NULL;1130 *size = 0;1131 return 0;1132 }1133 1134 if (!strcmp(fname, "-"))1135 f = stdin;1136 else1137 f = fopen(fname, "r");1138 if (!f) {1139 p_err("failed to open %s: %s", fname, strerror(errno));1140 return -1;1141 }1142 1143 *data_ptr = malloc(block_size);1144 if (!*data_ptr) {1145 p_err("failed to allocate memory for data_in/ctx_in: %s",1146 strerror(errno));1147 goto err_fclose;1148 }1149 1150 while ((nb_read += fread(*data_ptr + nb_read, 1, block_size, f))) {1151 if (feof(f))1152 break;1153 if (ferror(f)) {1154 p_err("failed to read data_in/ctx_in from %s: %s",1155 fname, strerror(errno));1156 goto err_free;1157 }1158 if (nb_read > buf_size - block_size) {1159 if (buf_size == UINT32_MAX) {1160 p_err("data_in/ctx_in is too long (max: %d)",1161 UINT32_MAX);1162 goto err_free;1163 }1164 /* No space for fread()-ing next chunk; realloc() */1165 buf_size *= 2;1166 tmp = realloc(*data_ptr, buf_size);1167 if (!tmp) {1168 p_err("failed to reallocate data_in/ctx_in: %s",1169 strerror(errno));1170 goto err_free;1171 }1172 *data_ptr = tmp;1173 }1174 }1175 if (f != stdin)1176 fclose(f);1177 1178 *size = nb_read;1179 return 0;1180 1181err_free:1182 free(*data_ptr);1183 *data_ptr = NULL;1184err_fclose:1185 if (f != stdin)1186 fclose(f);1187 return -1;1188}1189 1190static void hex_print(void *data, unsigned int size, FILE *f)1191{1192 size_t i, j;1193 char c;1194 1195 for (i = 0; i < size; i += 16) {1196 /* Row offset */1197 fprintf(f, "%07zx\t", i);1198 1199 /* Hexadecimal values */1200 for (j = i; j < i + 16 && j < size; j++)1201 fprintf(f, "%02x%s", *(uint8_t *)(data + j),1202 j % 2 ? " " : "");1203 for (; j < i + 16; j++)1204 fprintf(f, " %s", j % 2 ? " " : "");1205 1206 /* ASCII values (if relevant), '.' otherwise */1207 fprintf(f, "| ");1208 for (j = i; j < i + 16 && j < size; j++) {1209 c = *(char *)(data + j);1210 if (c < ' ' || c > '~')1211 c = '.';1212 fprintf(f, "%c%s", c, j == i + 7 ? " " : "");1213 }1214 1215 fprintf(f, "\n");1216 }1217}1218 1219static int1220print_run_output(void *data, unsigned int size, const char *fname,1221 const char *json_key)1222{1223 size_t nb_written;1224 FILE *f;1225 1226 if (!fname)1227 return 0;1228 1229 if (!strcmp(fname, "-")) {1230 f = stdout;1231 if (json_output) {1232 jsonw_name(json_wtr, json_key);1233 print_data_json(data, size);1234 } else {1235 hex_print(data, size, f);1236 }1237 return 0;1238 }1239 1240 f = fopen(fname, "w");1241 if (!f) {1242 p_err("failed to open %s: %s", fname, strerror(errno));1243 return -1;1244 }1245 1246 nb_written = fwrite(data, 1, size, f);1247 fclose(f);1248 if (nb_written != size) {1249 p_err("failed to write output data/ctx: %s", strerror(errno));1250 return -1;1251 }1252 1253 return 0;1254}1255 1256static int alloc_run_data(void **data_ptr, unsigned int size_out)1257{1258 *data_ptr = calloc(size_out, 1);1259 if (!*data_ptr) {1260 p_err("failed to allocate memory for output data/ctx: %s",1261 strerror(errno));1262 return -1;1263 }1264 1265 return 0;1266}1267 1268static int do_run(int argc, char **argv)1269{1270 char *data_fname_in = NULL, *data_fname_out = NULL;1271 char *ctx_fname_in = NULL, *ctx_fname_out = NULL;1272 const unsigned int default_size = SZ_32K;1273 void *data_in = NULL, *data_out = NULL;1274 void *ctx_in = NULL, *ctx_out = NULL;1275 unsigned int repeat = 1;1276 int fd, err;1277 LIBBPF_OPTS(bpf_test_run_opts, test_attr);1278 1279 if (!REQ_ARGS(4))1280 return -1;1281 1282 fd = prog_parse_fd(&argc, &argv);1283 if (fd < 0)1284 return -1;1285 1286 while (argc) {1287 if (detect_common_prefix(*argv, "data_in", "data_out",1288 "data_size_out", NULL))1289 return -1;1290 if (detect_common_prefix(*argv, "ctx_in", "ctx_out",1291 "ctx_size_out", NULL))1292 return -1;1293 1294 if (is_prefix(*argv, "data_in")) {1295 NEXT_ARG();1296 if (!REQ_ARGS(1))1297 return -1;1298 1299 data_fname_in = GET_ARG();1300 if (check_single_stdin(data_fname_in, ctx_fname_in))1301 return -1;1302 } else if (is_prefix(*argv, "data_out")) {1303 NEXT_ARG();1304 if (!REQ_ARGS(1))1305 return -1;1306 1307 data_fname_out = GET_ARG();1308 } else if (is_prefix(*argv, "data_size_out")) {1309 char *endptr;1310 1311 NEXT_ARG();1312 if (!REQ_ARGS(1))1313 return -1;1314 1315 test_attr.data_size_out = strtoul(*argv, &endptr, 0);1316 if (*endptr) {1317 p_err("can't parse %s as output data size",1318 *argv);1319 return -1;1320 }1321 NEXT_ARG();1322 } else if (is_prefix(*argv, "ctx_in")) {1323 NEXT_ARG();1324 if (!REQ_ARGS(1))1325 return -1;1326 1327 ctx_fname_in = GET_ARG();1328 if (check_single_stdin(data_fname_in, ctx_fname_in))1329 return -1;1330 } else if (is_prefix(*argv, "ctx_out")) {1331 NEXT_ARG();1332 if (!REQ_ARGS(1))1333 return -1;1334 1335 ctx_fname_out = GET_ARG();1336 } else if (is_prefix(*argv, "ctx_size_out")) {1337 char *endptr;1338 1339 NEXT_ARG();1340 if (!REQ_ARGS(1))1341 return -1;1342 1343 test_attr.ctx_size_out = strtoul(*argv, &endptr, 0);1344 if (*endptr) {1345 p_err("can't parse %s as output context size",1346 *argv);1347 return -1;1348 }1349 NEXT_ARG();1350 } else if (is_prefix(*argv, "repeat")) {1351 char *endptr;1352 1353 NEXT_ARG();1354 if (!REQ_ARGS(1))1355 return -1;1356 1357 repeat = strtoul(*argv, &endptr, 0);1358 if (*endptr) {1359 p_err("can't parse %s as repeat number",1360 *argv);1361 return -1;1362 }1363 NEXT_ARG();1364 } else {1365 p_err("expected no more arguments, 'data_in', 'data_out', 'data_size_out', 'ctx_in', 'ctx_out', 'ctx_size_out' or 'repeat', got: '%s'?",1366 *argv);1367 return -1;1368 }1369 }1370 1371 err = get_run_data(data_fname_in, &data_in, &test_attr.data_size_in);1372 if (err)1373 return -1;1374 1375 if (data_in) {1376 if (!test_attr.data_size_out)1377 test_attr.data_size_out = default_size;1378 err = alloc_run_data(&data_out, test_attr.data_size_out);1379 if (err)1380 goto free_data_in;1381 }1382 1383 err = get_run_data(ctx_fname_in, &ctx_in, &test_attr.ctx_size_in);1384 if (err)1385 goto free_data_out;1386 1387 if (ctx_in) {1388 if (!test_attr.ctx_size_out)1389 test_attr.ctx_size_out = default_size;1390 err = alloc_run_data(&ctx_out, test_attr.ctx_size_out);1391 if (err)1392 goto free_ctx_in;1393 }1394 1395 test_attr.repeat = repeat;1396 test_attr.data_in = data_in;1397 test_attr.data_out = data_out;1398 test_attr.ctx_in = ctx_in;1399 test_attr.ctx_out = ctx_out;1400 1401 err = bpf_prog_test_run_opts(fd, &test_attr);1402 if (err) {1403 p_err("failed to run program: %s", strerror(errno));1404 goto free_ctx_out;1405 }1406 1407 err = 0;1408 1409 if (json_output)1410 jsonw_start_object(json_wtr); /* root */1411 1412 /* Do not exit on errors occurring when printing output data/context,1413 * we still want to print return value and duration for program run.1414 */1415 if (test_attr.data_size_out)1416 err += print_run_output(test_attr.data_out,1417 test_attr.data_size_out,1418 data_fname_out, "data_out");1419 if (test_attr.ctx_size_out)1420 err += print_run_output(test_attr.ctx_out,1421 test_attr.ctx_size_out,1422 ctx_fname_out, "ctx_out");1423 1424 if (json_output) {1425 jsonw_uint_field(json_wtr, "retval", test_attr.retval);1426 jsonw_uint_field(json_wtr, "duration", test_attr.duration);1427 jsonw_end_object(json_wtr); /* root */1428 } else {1429 fprintf(stdout, "Return value: %u, duration%s: %uns\n",1430 test_attr.retval,1431 repeat > 1 ? " (average)" : "", test_attr.duration);1432 }1433 1434free_ctx_out:1435 free(ctx_out);1436free_ctx_in:1437 free(ctx_in);1438free_data_out:1439 free(data_out);1440free_data_in:1441 free(data_in);1442 1443 return err;1444}1445 1446static int1447get_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type,1448 enum bpf_attach_type *expected_attach_type)1449{1450 libbpf_print_fn_t print_backup;1451 int ret;1452 1453 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);1454 if (!ret)1455 return ret;1456 1457 /* libbpf_prog_type_by_name() failed, let's re-run with debug level */1458 print_backup = libbpf_set_print(print_all_levels);1459 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);1460 libbpf_set_print(print_backup);1461 1462 return ret;1463}1464 1465static int1466auto_attach_program(struct bpf_program *prog, const char *path)1467{1468 struct bpf_link *link;1469 int err;1470 1471 link = bpf_program__attach(prog);1472 if (!link) {1473 p_info("Program %s does not support autoattach, falling back to pinning",1474 bpf_program__name(prog));1475 return bpf_obj_pin(bpf_program__fd(prog), path);1476 }1477 1478 err = bpf_link__pin(link, path);1479 bpf_link__destroy(link);1480 return err;1481}1482 1483static int1484auto_attach_programs(struct bpf_object *obj, const char *path)1485{1486 struct bpf_program *prog;1487 char buf[PATH_MAX];1488 int err;1489 1490 bpf_object__for_each_program(prog, obj) {1491 err = pathname_concat(buf, sizeof(buf), path, bpf_program__name(prog));1492 if (err)1493 goto err_unpin_programs;1494 1495 err = auto_attach_program(prog, buf);1496 if (err)1497 goto err_unpin_programs;1498 }1499 1500 return 0;1501 1502err_unpin_programs:1503 while ((prog = bpf_object__prev_program(obj, prog))) {1504 if (pathname_concat(buf, sizeof(buf), path, bpf_program__name(prog)))1505 continue;1506 1507 bpf_program__unpin(prog, buf);1508 }1509 1510 return err;1511}1512 1513static int load_with_options(int argc, char **argv, bool first_prog_only)1514{1515 enum bpf_prog_type common_prog_type = BPF_PROG_TYPE_UNSPEC;1516 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts,1517 .relaxed_maps = relaxed_maps,1518 );1519 enum bpf_attach_type expected_attach_type;1520 struct map_replace *map_replace = NULL;1521 struct bpf_program *prog = NULL, *pos;1522 unsigned int old_map_fds = 0;1523 const char *pinmaps = NULL;1524 __u32 xdpmeta_ifindex = 0;1525 __u32 offload_ifindex = 0;1526 bool auto_attach = false;1527 struct bpf_object *obj;1528 struct bpf_map *map;1529 const char *pinfile;1530 unsigned int i, j;1531 const char *file;1532 int idx, err;1533 1534 1535 if (!REQ_ARGS(2))1536 return -1;1537 file = GET_ARG();1538 pinfile = GET_ARG();1539 1540 while (argc) {1541 if (is_prefix(*argv, "type")) {1542 NEXT_ARG();1543 1544 if (common_prog_type != BPF_PROG_TYPE_UNSPEC) {1545 p_err("program type already specified");1546 goto err_free_reuse_maps;1547 }1548 if (!REQ_ARGS(1))1549 goto err_free_reuse_maps;1550 1551 err = libbpf_prog_type_by_name(*argv, &common_prog_type,1552 &expected_attach_type);1553 if (err < 0) {1554 /* Put a '/' at the end of type to appease libbpf */1555 char *type = malloc(strlen(*argv) + 2);1556 1557 if (!type) {1558 p_err("mem alloc failed");1559 goto err_free_reuse_maps;1560 }1561 *type = 0;1562 strcat(type, *argv);1563 strcat(type, "/");1564 1565 err = get_prog_type_by_name(type, &common_prog_type,1566 &expected_attach_type);1567 free(type);1568 if (err < 0)1569 goto err_free_reuse_maps;1570 }1571 1572 NEXT_ARG();1573 } else if (is_prefix(*argv, "map")) {1574 void *new_map_replace;1575 char *endptr, *name;1576 int fd;1577 1578 NEXT_ARG();1579 1580 if (!REQ_ARGS(4))1581 goto err_free_reuse_maps;1582 1583 if (is_prefix(*argv, "idx")) {1584 NEXT_ARG();1585 1586 idx = strtoul(*argv, &endptr, 0);1587 if (*endptr) {1588 p_err("can't parse %s as IDX", *argv);1589 goto err_free_reuse_maps;1590 }1591 name = NULL;1592 } else if (is_prefix(*argv, "name")) {1593 NEXT_ARG();1594 1595 name = *argv;1596 idx = -1;1597 } else {1598 p_err("expected 'idx' or 'name', got: '%s'?",1599 *argv);1600 goto err_free_reuse_maps;1601 }1602 NEXT_ARG();1603 1604 fd = map_parse_fd(&argc, &argv);1605 if (fd < 0)1606 goto err_free_reuse_maps;1607 1608 new_map_replace = libbpf_reallocarray(map_replace,1609 old_map_fds + 1,1610 sizeof(*map_replace));1611 if (!new_map_replace) {1612 p_err("mem alloc failed");1613 goto err_free_reuse_maps;1614 }1615 map_replace = new_map_replace;1616 1617 map_replace[old_map_fds].idx = idx;1618 map_replace[old_map_fds].name = name;1619 map_replace[old_map_fds].fd = fd;1620 old_map_fds++;1621 } else if (is_prefix(*argv, "dev")) {1622 p_info("Warning: 'bpftool prog load [...] dev <ifname>' syntax is deprecated.\n"1623 "Going further, please use 'offload_dev <ifname>' to offload program to device.\n"1624 "For applications using XDP hints only, use 'xdpmeta_dev <ifname>'.");1625 goto offload_dev;1626 } else if (is_prefix(*argv, "offload_dev")) {1627offload_dev:1628 NEXT_ARG();1629 1630 if (offload_ifindex) {1631 p_err("offload_dev already specified");1632 goto err_free_reuse_maps;1633 } else if (xdpmeta_ifindex) {1634 p_err("xdpmeta_dev and offload_dev are mutually exclusive");1635 goto err_free_reuse_maps;1636 }1637 if (!REQ_ARGS(1))1638 goto err_free_reuse_maps;1639 1640 offload_ifindex = if_nametoindex(*argv);1641 if (!offload_ifindex) {1642 p_err("unrecognized netdevice '%s': %s",1643 *argv, strerror(errno));1644 goto err_free_reuse_maps;1645 }1646 NEXT_ARG();1647 } else if (is_prefix(*argv, "xdpmeta_dev")) {1648 NEXT_ARG();1649 1650 if (xdpmeta_ifindex) {1651 p_err("xdpmeta_dev already specified");1652 goto err_free_reuse_maps;1653 } else if (offload_ifindex) {1654 p_err("xdpmeta_dev and offload_dev are mutually exclusive");1655 goto err_free_reuse_maps;1656 }1657 if (!REQ_ARGS(1))1658 goto err_free_reuse_maps;1659 1660 xdpmeta_ifindex = if_nametoindex(*argv);1661 if (!xdpmeta_ifindex) {1662 p_err("unrecognized netdevice '%s': %s",1663 *argv, strerror(errno));1664 goto err_free_reuse_maps;1665 }1666 NEXT_ARG();1667 } else if (is_prefix(*argv, "pinmaps")) {1668 NEXT_ARG();1669 1670 if (!REQ_ARGS(1))1671 goto err_free_reuse_maps;1672 1673 pinmaps = GET_ARG();1674 } else if (is_prefix(*argv, "autoattach")) {1675 auto_attach = true;1676 NEXT_ARG();1677 } else {1678 p_err("expected no more arguments, 'type', 'map' or 'dev', got: '%s'?",1679 *argv);1680 goto err_free_reuse_maps;1681 }1682 }1683 1684 set_max_rlimit();1685 1686 if (verifier_logs)1687 /* log_level1 + log_level2 + stats, but not stable UAPI */1688 open_opts.kernel_log_level = 1 + 2 + 4;1689 1690 obj = bpf_object__open_file(file, &open_opts);1691 if (!obj) {1692 p_err("failed to open object file");1693 goto err_free_reuse_maps;1694 }1695 1696 bpf_object__for_each_program(pos, obj) {1697 enum bpf_prog_type prog_type = common_prog_type;1698 1699 if (prog_type == BPF_PROG_TYPE_UNSPEC) {1700 const char *sec_name = bpf_program__section_name(pos);1701 1702 err = get_prog_type_by_name(sec_name, &prog_type,1703 &expected_attach_type);1704 if (err < 0)1705 goto err_close_obj;1706 }1707 1708 if (prog_type == BPF_PROG_TYPE_XDP && xdpmeta_ifindex) {1709 bpf_program__set_flags(pos, BPF_F_XDP_DEV_BOUND_ONLY);1710 bpf_program__set_ifindex(pos, xdpmeta_ifindex);1711 } else {1712 bpf_program__set_ifindex(pos, offload_ifindex);1713 }1714 if (bpf_program__type(pos) != prog_type)1715 bpf_program__set_type(pos, prog_type);1716 bpf_program__set_expected_attach_type(pos, expected_attach_type);1717 }1718 1719 qsort(map_replace, old_map_fds, sizeof(*map_replace),1720 map_replace_compar);1721 1722 /* After the sort maps by name will be first on the list, because they1723 * have idx == -1. Resolve them.1724 */1725 j = 0;1726 while (j < old_map_fds && map_replace[j].name) {1727 i = 0;1728 bpf_object__for_each_map(map, obj) {1729 if (!strcmp(bpf_map__name(map), map_replace[j].name)) {1730 map_replace[j].idx = i;1731 break;1732 }1733 i++;1734 }1735 if (map_replace[j].idx == -1) {1736 p_err("unable to find map '%s'", map_replace[j].name);1737 goto err_close_obj;1738 }1739 j++;1740 }1741 /* Resort if any names were resolved */1742 if (j)1743 qsort(map_replace, old_map_fds, sizeof(*map_replace),1744 map_replace_compar);1745 1746 /* Set ifindex and name reuse */1747 j = 0;1748 idx = 0;1749 bpf_object__for_each_map(map, obj) {1750 if (bpf_map__type(map) != BPF_MAP_TYPE_PERF_EVENT_ARRAY)1751 bpf_map__set_ifindex(map, offload_ifindex);1752 1753 if (j < old_map_fds && idx == map_replace[j].idx) {1754 err = bpf_map__reuse_fd(map, map_replace[j++].fd);1755 if (err) {1756 p_err("unable to set up map reuse: %d", err);1757 goto err_close_obj;1758 }1759 1760 /* Next reuse wants to apply to the same map */1761 if (j < old_map_fds && map_replace[j].idx == idx) {1762 p_err("replacement for map idx %d specified more than once",1763 idx);1764 goto err_close_obj;1765 }1766 }1767 1768 idx++;1769 }1770 if (j < old_map_fds) {1771 p_err("map idx '%d' not used", map_replace[j].idx);1772 goto err_close_obj;1773 }1774 1775 err = bpf_object__load(obj);1776 if (err) {1777 p_err("failed to load object file");1778 goto err_close_obj;1779 }1780 1781 if (first_prog_only)1782 err = mount_bpffs_for_file(pinfile);1783 else1784 err = create_and_mount_bpffs_dir(pinfile);1785 if (err)1786 goto err_close_obj;1787 1788 if (first_prog_only) {1789 prog = bpf_object__next_program(obj, NULL);1790 if (!prog) {1791 p_err("object file doesn't contain any bpf program");1792 goto err_close_obj;1793 }1794 1795 if (auto_attach)1796 err = auto_attach_program(prog, pinfile);1797 else1798 err = bpf_obj_pin(bpf_program__fd(prog), pinfile);1799 if (err) {1800 p_err("failed to pin program %s",1801 bpf_program__section_name(prog));1802 goto err_close_obj;1803 }1804 } else {1805 if (auto_attach)1806 err = auto_attach_programs(obj, pinfile);1807 else1808 err = bpf_object__pin_programs(obj, pinfile);1809 if (err) {1810 p_err("failed to pin all programs");1811 goto err_close_obj;1812 }1813 }1814 1815 if (pinmaps) {1816 err = create_and_mount_bpffs_dir(pinmaps);1817 if (err)1818 goto err_unpin;1819 1820 err = bpf_object__pin_maps(obj, pinmaps);1821 if (err) {1822 p_err("failed to pin all maps");1823 goto err_unpin;1824 }1825 }1826 1827 if (json_output)1828 jsonw_null(json_wtr);1829 1830 bpf_object__close(obj);1831 for (i = 0; i < old_map_fds; i++)1832 close(map_replace[i].fd);1833 free(map_replace);1834 1835 return 0;1836 1837err_unpin:1838 if (first_prog_only)1839 unlink(pinfile);1840 else1841 bpf_object__unpin_programs(obj, pinfile);1842err_close_obj:1843 bpf_object__close(obj);1844err_free_reuse_maps:1845 for (i = 0; i < old_map_fds; i++)1846 close(map_replace[i].fd);1847 free(map_replace);1848 return -1;1849}1850 1851static int count_open_fds(void)1852{1853 DIR *dp = opendir("/proc/self/fd");1854 struct dirent *de;1855 int cnt = -3;1856 1857 if (!dp)1858 return -1;1859 1860 while ((de = readdir(dp)))1861 cnt++;1862 1863 closedir(dp);1864 return cnt;1865}1866 1867static int try_loader(struct gen_loader_opts *gen)1868{1869 struct bpf_load_and_run_opts opts = {};1870 struct bpf_loader_ctx *ctx;1871 int ctx_sz = sizeof(*ctx) + 64 * max(sizeof(struct bpf_map_desc),1872 sizeof(struct bpf_prog_desc));1873 int log_buf_sz = (1u << 24) - 1;1874 int err, fds_before, fd_delta;1875 char *log_buf = NULL;1876 1877 ctx = alloca(ctx_sz);1878 memset(ctx, 0, ctx_sz);1879 ctx->sz = ctx_sz;1880 if (verifier_logs) {1881 ctx->log_level = 1 + 2 + 4;1882 ctx->log_size = log_buf_sz;1883 log_buf = malloc(log_buf_sz);1884 if (!log_buf)1885 return -ENOMEM;1886 ctx->log_buf = (long) log_buf;1887 }1888 opts.ctx = ctx;1889 opts.data = gen->data;1890 opts.data_sz = gen->data_sz;1891 opts.insns = gen->insns;1892 opts.insns_sz = gen->insns_sz;1893 fds_before = count_open_fds();1894 err = bpf_load_and_run(&opts);1895 fd_delta = count_open_fds() - fds_before;1896 if (err < 0 || verifier_logs) {1897 fprintf(stderr, "err %d\n%s\n%s", err, opts.errstr, log_buf);1898 if (fd_delta && err < 0)1899 fprintf(stderr, "loader prog leaked %d FDs\n",1900 fd_delta);1901 }1902 free(log_buf);1903 return err;1904}1905 1906static int do_loader(int argc, char **argv)1907{1908 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts);1909 DECLARE_LIBBPF_OPTS(gen_loader_opts, gen);1910 struct bpf_object *obj;1911 const char *file;1912 int err = 0;1913 1914 if (!REQ_ARGS(1))1915 return -1;1916 file = GET_ARG();1917 1918 if (verifier_logs)1919 /* log_level1 + log_level2 + stats, but not stable UAPI */1920 open_opts.kernel_log_level = 1 + 2 + 4;1921 1922 obj = bpf_object__open_file(file, &open_opts);1923 if (!obj) {1924 p_err("failed to open object file");1925 goto err_close_obj;1926 }1927 1928 err = bpf_object__gen_loader(obj, &gen);1929 if (err)1930 goto err_close_obj;1931 1932 err = bpf_object__load(obj);1933 if (err) {1934 p_err("failed to load object file");1935 goto err_close_obj;1936 }1937 1938 if (verifier_logs) {1939 struct dump_data dd = {};1940 1941 kernel_syms_load(&dd);1942 dump_xlated_plain(&dd, (void *)gen.insns, gen.insns_sz, false, false);1943 kernel_syms_destroy(&dd);1944 }1945 err = try_loader(&gen);1946err_close_obj:1947 bpf_object__close(obj);1948 return err;1949}1950 1951static int do_load(int argc, char **argv)1952{1953 if (use_loader)1954 return do_loader(argc, argv);1955 return load_with_options(argc, argv, true);1956}1957 1958static int do_loadall(int argc, char **argv)1959{1960 return load_with_options(argc, argv, false);1961}1962 1963#ifdef BPFTOOL_WITHOUT_SKELETONS1964 1965static int do_profile(int argc, char **argv)1966{1967 p_err("bpftool prog profile command is not supported. Please build bpftool with clang >= 10.0.0");1968 return 0;1969}1970 1971#else /* BPFTOOL_WITHOUT_SKELETONS */1972 1973#include "profiler.skel.h"1974 1975struct profile_metric {1976 const char *name;1977 struct bpf_perf_event_value val;1978 struct perf_event_attr attr;1979 bool selected;1980 1981 /* calculate ratios like instructions per cycle */1982 const int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */1983 const char *ratio_desc;1984 const float ratio_mul;1985} metrics[] = {1986 {1987 .name = "cycles",1988 .attr = {1989 .type = PERF_TYPE_HARDWARE,1990 .config = PERF_COUNT_HW_CPU_CYCLES,1991 .exclude_user = 1,1992 },1993 },1994 {1995 .name = "instructions",1996 .attr = {1997 .type = PERF_TYPE_HARDWARE,1998 .config = PERF_COUNT_HW_INSTRUCTIONS,1999 .exclude_user = 1,2000 },2001 .ratio_metric = 1,2002 .ratio_desc = "insns per cycle",2003 .ratio_mul = 1.0,2004 },2005 {2006 .name = "l1d_loads",2007 .attr = {2008 .type = PERF_TYPE_HW_CACHE,2009 .config =2010 PERF_COUNT_HW_CACHE_L1D |2011 (PERF_COUNT_HW_CACHE_OP_READ << 8) |2012 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),2013 .exclude_user = 1,2014 },2015 },2016 {2017 .name = "llc_misses",2018 .attr = {2019 .type = PERF_TYPE_HW_CACHE,2020 .config =2021 PERF_COUNT_HW_CACHE_LL |2022 (PERF_COUNT_HW_CACHE_OP_READ << 8) |2023 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),2024 .exclude_user = 12025 },2026 .ratio_metric = 2,2027 .ratio_desc = "LLC misses per million insns",2028 .ratio_mul = 1e6,2029 },2030 {2031 .name = "itlb_misses",2032 .attr = {2033 .type = PERF_TYPE_HW_CACHE,2034 .config =2035 PERF_COUNT_HW_CACHE_ITLB |2036 (PERF_COUNT_HW_CACHE_OP_READ << 8) |2037 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),2038 .exclude_user = 12039 },2040 .ratio_metric = 2,2041 .ratio_desc = "itlb misses per million insns",2042 .ratio_mul = 1e6,2043 },2044 {2045 .name = "dtlb_misses",2046 .attr = {2047 .type = PERF_TYPE_HW_CACHE,2048 .config =2049 PERF_COUNT_HW_CACHE_DTLB |2050 (PERF_COUNT_HW_CACHE_OP_READ << 8) |2051 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),2052 .exclude_user = 12053 },2054 .ratio_metric = 2,2055 .ratio_desc = "dtlb misses per million insns",2056 .ratio_mul = 1e6,2057 },2058};2059 2060static __u64 profile_total_count;2061 2062#define MAX_NUM_PROFILE_METRICS 42063 2064static int profile_parse_metrics(int argc, char **argv)2065{2066 unsigned int metric_cnt;2067 int selected_cnt = 0;2068 unsigned int i;2069 2070 metric_cnt = ARRAY_SIZE(metrics);2071 2072 while (argc > 0) {2073 for (i = 0; i < metric_cnt; i++) {2074 if (is_prefix(argv[0], metrics[i].name)) {2075 if (!metrics[i].selected)2076 selected_cnt++;2077 metrics[i].selected = true;2078 break;2079 }2080 }2081 if (i == metric_cnt) {2082 p_err("unknown metric %s", argv[0]);2083 return -1;2084 }2085 NEXT_ARG();2086 }2087 if (selected_cnt > MAX_NUM_PROFILE_METRICS) {2088 p_err("too many (%d) metrics, please specify no more than %d metrics at a time",2089 selected_cnt, MAX_NUM_PROFILE_METRICS);2090 return -1;2091 }2092 return selected_cnt;2093}2094 2095static void profile_read_values(struct profiler_bpf *obj)2096{2097 __u32 m, cpu, num_cpu = obj->rodata->num_cpu;2098 int reading_map_fd, count_map_fd;2099 __u64 counts[num_cpu];2100 __u32 key = 0;2101 int err;2102 2103 reading_map_fd = bpf_map__fd(obj->maps.accum_readings);2104 count_map_fd = bpf_map__fd(obj->maps.counts);2105 if (reading_map_fd < 0 || count_map_fd < 0) {2106 p_err("failed to get fd for map");2107 return;2108 }2109 2110 err = bpf_map_lookup_elem(count_map_fd, &key, counts);2111 if (err) {2112 p_err("failed to read count_map: %s", strerror(errno));2113 return;2114 }2115 2116 profile_total_count = 0;2117 for (cpu = 0; cpu < num_cpu; cpu++)2118 profile_total_count += counts[cpu];2119 2120 for (m = 0; m < ARRAY_SIZE(metrics); m++) {2121 struct bpf_perf_event_value values[num_cpu];2122 2123 if (!metrics[m].selected)2124 continue;2125 2126 err = bpf_map_lookup_elem(reading_map_fd, &key, values);2127 if (err) {2128 p_err("failed to read reading_map: %s",2129 strerror(errno));2130 return;2131 }2132 for (cpu = 0; cpu < num_cpu; cpu++) {2133 metrics[m].val.counter += values[cpu].counter;2134 metrics[m].val.enabled += values[cpu].enabled;2135 metrics[m].val.running += values[cpu].running;2136 }2137 key++;2138 }2139}2140 2141static void profile_print_readings_json(void)2142{2143 __u32 m;2144 2145 jsonw_start_array(json_wtr);2146 for (m = 0; m < ARRAY_SIZE(metrics); m++) {2147 if (!metrics[m].selected)2148 continue;2149 jsonw_start_object(json_wtr);2150 jsonw_string_field(json_wtr, "metric", metrics[m].name);2151 jsonw_lluint_field(json_wtr, "run_cnt", profile_total_count);2152 jsonw_lluint_field(json_wtr, "value", metrics[m].val.counter);2153 jsonw_lluint_field(json_wtr, "enabled", metrics[m].val.enabled);2154 jsonw_lluint_field(json_wtr, "running", metrics[m].val.running);2155 2156 jsonw_end_object(json_wtr);2157 }2158 jsonw_end_array(json_wtr);2159}2160 2161static void profile_print_readings_plain(void)2162{2163 __u32 m;2164 2165 printf("\n%18llu %-20s\n", profile_total_count, "run_cnt");2166 for (m = 0; m < ARRAY_SIZE(metrics); m++) {2167 struct bpf_perf_event_value *val = &metrics[m].val;2168 int r;2169 2170 if (!metrics[m].selected)2171 continue;2172 printf("%18llu %-20s", val->counter, metrics[m].name);2173 2174 r = metrics[m].ratio_metric - 1;2175 if (r >= 0 && metrics[r].selected &&2176 metrics[r].val.counter > 0) {2177 printf("# %8.2f %-30s",2178 val->counter * metrics[m].ratio_mul /2179 metrics[r].val.counter,2180 metrics[m].ratio_desc);2181 } else {2182 printf("%-41s", "");2183 }2184 2185 if (val->enabled > val->running)2186 printf("(%4.2f%%)",2187 val->running * 100.0 / val->enabled);2188 printf("\n");2189 }2190}2191 2192static void profile_print_readings(void)2193{2194 if (json_output)2195 profile_print_readings_json();2196 else2197 profile_print_readings_plain();2198}2199 2200static char *profile_target_name(int tgt_fd)2201{2202 struct bpf_func_info func_info;2203 struct bpf_prog_info info = {};2204 __u32 info_len = sizeof(info);2205 const struct btf_type *t;2206 __u32 func_info_rec_size;2207 struct btf *btf = NULL;2208 char *name = NULL;2209 int err;2210 2211 err = bpf_prog_get_info_by_fd(tgt_fd, &info, &info_len);2212 if (err) {2213 p_err("failed to get info for prog FD %d", tgt_fd);2214 goto out;2215 }2216 2217 if (info.btf_id == 0) {2218 p_err("prog FD %d doesn't have valid btf", tgt_fd);2219 goto out;2220 }2221 2222 func_info_rec_size = info.func_info_rec_size;2223 if (info.nr_func_info == 0) {2224 p_err("found 0 func_info for prog FD %d", tgt_fd);2225 goto out;2226 }2227 2228 memset(&info, 0, sizeof(info));2229 info.nr_func_info = 1;2230 info.func_info_rec_size = func_info_rec_size;2231 info.func_info = ptr_to_u64(&func_info);2232 2233 err = bpf_prog_get_info_by_fd(tgt_fd, &info, &info_len);2234 if (err) {2235 p_err("failed to get func_info for prog FD %d", tgt_fd);2236 goto out;2237 }2238 2239 btf = btf__load_from_kernel_by_id(info.btf_id);2240 if (!btf) {2241 p_err("failed to load btf for prog FD %d", tgt_fd);2242 goto out;2243 }2244 2245 t = btf__type_by_id(btf, func_info.type_id);2246 if (!t) {2247 p_err("btf %d doesn't have type %d",2248 info.btf_id, func_info.type_id);2249 goto out;2250 }2251 name = strdup(btf__name_by_offset(btf, t->name_off));2252out:2253 btf__free(btf);2254 return name;2255}2256 2257static struct profiler_bpf *profile_obj;2258static int profile_tgt_fd = -1;2259static char *profile_tgt_name;2260static int *profile_perf_events;2261static int profile_perf_event_cnt;2262 2263static void profile_close_perf_events(struct profiler_bpf *obj)2264{2265 int i;2266 2267 for (i = profile_perf_event_cnt - 1; i >= 0; i--)2268 close(profile_perf_events[i]);2269 2270 free(profile_perf_events);2271 profile_perf_event_cnt = 0;2272}2273 2274static int profile_open_perf_event(int mid, int cpu, int map_fd)2275{2276 int pmu_fd;2277 2278 pmu_fd = syscall(__NR_perf_event_open, &metrics[mid].attr,2279 -1 /*pid*/, cpu, -1 /*group_fd*/, 0);2280 if (pmu_fd < 0) {2281 if (errno == ENODEV) {2282 p_info("cpu %d may be offline, skip %s profiling.",2283 cpu, metrics[mid].name);2284 profile_perf_event_cnt++;2285 return 0;2286 }2287 return -1;2288 }2289 2290 if (bpf_map_update_elem(map_fd,2291 &profile_perf_event_cnt,2292 &pmu_fd, BPF_ANY) ||2293 ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0)) {2294 close(pmu_fd);2295 return -1;2296 }2297 2298 profile_perf_events[profile_perf_event_cnt++] = pmu_fd;2299 return 0;2300}2301 2302static int profile_open_perf_events(struct profiler_bpf *obj)2303{2304 unsigned int cpu, m;2305 int map_fd;2306 2307 profile_perf_events = calloc(2308 obj->rodata->num_cpu * obj->rodata->num_metric, sizeof(int));2309 if (!profile_perf_events) {2310 p_err("failed to allocate memory for perf_event array: %s",2311 strerror(errno));2312 return -1;2313 }2314 map_fd = bpf_map__fd(obj->maps.events);2315 if (map_fd < 0) {2316 p_err("failed to get fd for events map");2317 return -1;2318 }2319 2320 for (m = 0; m < ARRAY_SIZE(metrics); m++) {2321 if (!metrics[m].selected)2322 continue;2323 for (cpu = 0; cpu < obj->rodata->num_cpu; cpu++) {2324 if (profile_open_perf_event(m, cpu, map_fd)) {2325 p_err("failed to create event %s on cpu %d",2326 metrics[m].name, cpu);2327 return -1;2328 }2329 }2330 }2331 return 0;2332}2333 2334static void profile_print_and_cleanup(void)2335{2336 profile_close_perf_events(profile_obj);2337 profile_read_values(profile_obj);2338 profile_print_readings();2339 profiler_bpf__destroy(profile_obj);2340 2341 close(profile_tgt_fd);2342 free(profile_tgt_name);2343}2344 2345static void int_exit(int signo)2346{2347 profile_print_and_cleanup();2348 exit(0);2349}2350 2351static int do_profile(int argc, char **argv)2352{2353 int num_metric, num_cpu, err = -1;2354 struct bpf_program *prog;2355 unsigned long duration;2356 char *endptr;2357 2358 /* we at least need two args for the prog and one metric */2359 if (!REQ_ARGS(3))2360 return -EINVAL;2361 2362 /* parse target fd */2363 profile_tgt_fd = prog_parse_fd(&argc, &argv);2364 if (profile_tgt_fd < 0) {2365 p_err("failed to parse fd");2366 return -1;2367 }2368 2369 /* parse profiling optional duration */2370 if (argc > 2 && is_prefix(argv[0], "duration")) {2371 NEXT_ARG();2372 duration = strtoul(*argv, &endptr, 0);2373 if (*endptr)2374 usage();2375 NEXT_ARG();2376 } else {2377 duration = UINT_MAX;2378 }2379 2380 num_metric = profile_parse_metrics(argc, argv);2381 if (num_metric <= 0)2382 goto out;2383 2384 num_cpu = libbpf_num_possible_cpus();2385 if (num_cpu <= 0) {2386 p_err("failed to identify number of CPUs");2387 goto out;2388 }2389 2390 profile_obj = profiler_bpf__open();2391 if (!profile_obj) {2392 p_err("failed to open and/or load BPF object");2393 goto out;2394 }2395 2396 profile_obj->rodata->num_cpu = num_cpu;2397 profile_obj->rodata->num_metric = num_metric;2398 2399 /* adjust map sizes */2400 bpf_map__set_max_entries(profile_obj->maps.events, num_metric * num_cpu);2401 bpf_map__set_max_entries(profile_obj->maps.fentry_readings, num_metric);2402 bpf_map__set_max_entries(profile_obj->maps.accum_readings, num_metric);2403 bpf_map__set_max_entries(profile_obj->maps.counts, 1);2404 2405 /* change target name */2406 profile_tgt_name = profile_target_name(profile_tgt_fd);2407 if (!profile_tgt_name)2408 goto out;2409 2410 bpf_object__for_each_program(prog, profile_obj->obj) {2411 err = bpf_program__set_attach_target(prog, profile_tgt_fd,2412 profile_tgt_name);2413 if (err) {2414 p_err("failed to set attach target\n");2415 goto out;2416 }2417 }2418 2419 set_max_rlimit();2420 err = profiler_bpf__load(profile_obj);2421 if (err) {2422 p_err("failed to load profile_obj");2423 goto out;2424 }2425 2426 err = profile_open_perf_events(profile_obj);2427 if (err)2428 goto out;2429 2430 err = profiler_bpf__attach(profile_obj);2431 if (err) {2432 p_err("failed to attach profile_obj");2433 goto out;2434 }2435 signal(SIGINT, int_exit);2436 2437 sleep(duration);2438 profile_print_and_cleanup();2439 return 0;2440 2441out:2442 profile_close_perf_events(profile_obj);2443 if (profile_obj)2444 profiler_bpf__destroy(profile_obj);2445 close(profile_tgt_fd);2446 free(profile_tgt_name);2447 return err;2448}2449 2450#endif /* BPFTOOL_WITHOUT_SKELETONS */2451 2452static int do_help(int argc, char **argv)2453{2454 if (json_output) {2455 jsonw_null(json_wtr);2456 return 0;2457 }2458 2459 fprintf(stderr,2460 "Usage: %1$s %2$s { show | list } [PROG]\n"2461 " %1$s %2$s dump xlated PROG [{ file FILE | [opcodes] [linum] [visual] }]\n"2462 " %1$s %2$s dump jited PROG [{ file FILE | [opcodes] [linum] }]\n"2463 " %1$s %2$s pin PROG FILE\n"2464 " %1$s %2$s { load | loadall } OBJ PATH \\\n"2465 " [type TYPE] [{ offload_dev | xdpmeta_dev } NAME] \\\n"2466 " [map { idx IDX | name NAME } MAP]\\\n"2467 " [pinmaps MAP_DIR]\n"2468 " [autoattach]\n"2469 " %1$s %2$s attach PROG ATTACH_TYPE [MAP]\n"2470 " %1$s %2$s detach PROG ATTACH_TYPE [MAP]\n"2471 " %1$s %2$s run PROG \\\n"2472 " data_in FILE \\\n"2473 " [data_out FILE [data_size_out L]] \\\n"2474 " [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n"2475 " [repeat N]\n"2476 " %1$s %2$s profile PROG [duration DURATION] METRICs\n"2477 " %1$s %2$s tracelog\n"2478 " %1$s %2$s help\n"2479 "\n"2480 " " HELP_SPEC_MAP "\n"2481 " " HELP_SPEC_PROGRAM "\n"2482 " TYPE := { socket | kprobe | kretprobe | classifier | action |\n"2483 " tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n"2484 " cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n"2485 " lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n"2486 " sk_reuseport | flow_dissector | cgroup/sysctl |\n"2487 " cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"2488 " cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"2489 " cgroup/connect_unix | cgroup/getpeername4 | cgroup/getpeername6 |\n"2490 " cgroup/getpeername_unix | cgroup/getsockname4 | cgroup/getsockname6 |\n"2491 " cgroup/getsockname_unix | cgroup/sendmsg4 | cgroup/sendmsg6 |\n"2492 " cgroup/sendmsg_unix | cgroup/recvmsg4 | cgroup/recvmsg6 | cgroup/recvmsg_unix |\n"2493 " cgroup/getsockopt | cgroup/setsockopt | cgroup/sock_release |\n"2494 " struct_ops | fentry | fexit | freplace | sk_lookup }\n"2495 " ATTACH_TYPE := { sk_msg_verdict | sk_skb_verdict | sk_skb_stream_verdict |\n"2496 " sk_skb_stream_parser | flow_dissector }\n"2497 " METRIC := { cycles | instructions | l1d_loads | llc_misses | itlb_misses | dtlb_misses }\n"2498 " " HELP_SPEC_OPTIONS " |\n"2499 " {-f|--bpffs} | {-m|--mapcompat} | {-n|--nomount} |\n"2500 " {-L|--use-loader} }\n"2501 "",2502 bin_name, argv[-2]);2503 2504 return 0;2505}2506 2507static const struct cmd cmds[] = {2508 { "show", do_show },2509 { "list", do_show },2510 { "help", do_help },2511 { "dump", do_dump },2512 { "pin", do_pin },2513 { "load", do_load },2514 { "loadall", do_loadall },2515 { "attach", do_attach },2516 { "detach", do_detach },2517 { "tracelog", do_tracelog },2518 { "run", do_run },2519 { "profile", do_profile },2520 { 0 }2521};2522 2523int do_prog(int argc, char **argv)2524{2525 return cmd_select(cmds, argc, argv, do_help);2526}2527