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