tools/bpf/bpftool/prog.c

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