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 #include <dirent.h>
  20
  21 #include <linux/err.h>
  22 #include <linux/perf_event.h>
  23 #include <linux/sizes.h>
  24
  25 #include <bpf/bpf.h>
  26 #include <bpf/btf.h>
  27 #include <bpf/libbpf.h>
  28 #include <bpf/bpf_gen_internal.h>
  29 #include <bpf/skel_internal.h>
  30
  31 #include "cfg.h"
  32 #include "main.h"
  33 #include "xlated_dumper.h"
  34
  35 #define BPF_METADATA_PREFIX "bpf_metadata_"
  36 #define BPF_METADATA_PREFIX_LEN (sizeof(BPF_METADATA_PREFIX) - 1)
  37
  38 const char * const prog_type_name[] = {
  39         [BPF_PROG_TYPE_UNSPEC]                  = "unspec",
  40         [BPF_PROG_TYPE_SOCKET_FILTER]           = "socket_filter",
  41         [BPF_PROG_TYPE_KPROBE]                  = "kprobe",
  42         [BPF_PROG_TYPE_SCHED_CLS]               = "sched_cls",
  43         [BPF_PROG_TYPE_SCHED_ACT]               = "sched_act",
  44         [BPF_PROG_TYPE_TRACEPOINT]              = "tracepoint",
  45         [BPF_PROG_TYPE_XDP]                     = "xdp",
  46         [BPF_PROG_TYPE_PERF_EVENT]              = "perf_event",
  47         [BPF_PROG_TYPE_CGROUP_SKB]              = "cgroup_skb",
  48         [BPF_PROG_TYPE_CGROUP_SOCK]             = "cgroup_sock",
  49         [BPF_PROG_TYPE_LWT_IN]                  = "lwt_in",
  50         [BPF_PROG_TYPE_LWT_OUT]                 = "lwt_out",
  51         [BPF_PROG_TYPE_LWT_XMIT]                = "lwt_xmit",
  52         [BPF_PROG_TYPE_SOCK_OPS]                = "sock_ops",
  53         [BPF_PROG_TYPE_SK_SKB]                  = "sk_skb",
  54         [BPF_PROG_TYPE_CGROUP_DEVICE]           = "cgroup_device",
  55         [BPF_PROG_TYPE_SK_MSG]                  = "sk_msg",
  56         [BPF_PROG_TYPE_RAW_TRACEPOINT]          = "raw_tracepoint",
  57         [BPF_PROG_TYPE_CGROUP_SOCK_ADDR]        = "cgroup_sock_addr",
  58         [BPF_PROG_TYPE_LWT_SEG6LOCAL]           = "lwt_seg6local",
  59         [BPF_PROG_TYPE_LIRC_MODE2]              = "lirc_mode2",
  60         [BPF_PROG_TYPE_SK_REUSEPORT]            = "sk_reuseport",
  61         [BPF_PROG_TYPE_FLOW_DISSECTOR]          = "flow_dissector",
  62         [BPF_PROG_TYPE_CGROUP_SYSCTL]           = "cgroup_sysctl",
  63         [BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE] = "raw_tracepoint_writable",
  64         [BPF_PROG_TYPE_CGROUP_SOCKOPT]          = "cgroup_sockopt",
  65         [BPF_PROG_TYPE_TRACING]                 = "tracing",
  66         [BPF_PROG_TYPE_STRUCT_OPS]              = "struct_ops",
  67         [BPF_PROG_TYPE_EXT]                     = "ext",
  68         [BPF_PROG_TYPE_LSM]                     = "lsm",
  69         [BPF_PROG_TYPE_SK_LOOKUP]               = "sk_lookup",
  70 };
  71
  72 const size_t prog_type_name_size = ARRAY_SIZE(prog_type_name);
  73
  74 enum dump_mode {
  75         DUMP_JITED,
  76         DUMP_XLATED,
  77 };
  78
  79 static const char * const attach_type_strings[] = {
  80         [BPF_SK_SKB_STREAM_PARSER] = "stream_parser",
  81         [BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict",
  82         [BPF_SK_SKB_VERDICT] = "skb_verdict",
  83         [BPF_SK_MSG_VERDICT] = "msg_verdict",
  84         [BPF_FLOW_DISSECTOR] = "flow_dissector",
  85         [__MAX_BPF_ATTACH_TYPE] = NULL,
  86 };
  87
  88 static enum bpf_attach_type parse_attach_type(const char *str)
  89 {
  90         enum bpf_attach_type type;
  91
  92         for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) {
  93                 if (attach_type_strings[type] &&
  94                     is_prefix(str, attach_type_strings[type]))
  95                         return type;
  96         }
  97
  98         return __MAX_BPF_ATTACH_TYPE;
  99 }
 100
 101 static void print_boot_time(__u64 nsecs, char *buf, unsigned int size)
 102 {
 103         struct timespec real_time_ts, boot_time_ts;
 104         time_t wallclock_secs;
 105         struct tm load_tm;
 106
 107         buf[--size] = '\0';
 108
 109         if (clock_gettime(CLOCK_REALTIME, &real_time_ts) ||
 110             clock_gettime(CLOCK_BOOTTIME, &boot_time_ts)) {
 111                 perror("Can't read clocks");
 112                 snprintf(buf, size, "%llu", nsecs / 1000000000);
 113                 return;
 114         }
 115
 116         wallclock_secs = (real_time_ts.tv_sec - boot_time_ts.tv_sec) +
 117                 (real_time_ts.tv_nsec - boot_time_ts.tv_nsec + nsecs) /
 118                 1000000000;
 119
 120
 121         if (!localtime_r(&wallclock_secs, &load_tm)) {
 122                 snprintf(buf, size, "%llu", nsecs / 1000000000);
 123                 return;
 124         }
 125
 126         if (json_output)
 127                 strftime(buf, size, "%s", &load_tm);
 128         else
 129                 strftime(buf, size, "%FT%T%z", &load_tm);
 130 }
 131
 132 static void show_prog_maps(int fd, __u32 num_maps)
 133 {
 134         struct bpf_prog_info info = {};
 135         __u32 len = sizeof(info);
 136         __u32 map_ids[num_maps];
 137         unsigned int i;
 138         int err;
 139
 140         info.nr_map_ids = num_maps;
 141         info.map_ids = ptr_to_u64(map_ids);
 142
 143         err = bpf_obj_get_info_by_fd(fd, &info, &len);
 144         if (err || !info.nr_map_ids)
 145                 return;
 146
 147         if (json_output) {
 148                 jsonw_name(json_wtr, "map_ids");
 149                 jsonw_start_array(json_wtr);
 150                 for (i = 0; i < info.nr_map_ids; i++)
 151                         jsonw_uint(json_wtr, map_ids[i]);
 152                 jsonw_end_array(json_wtr);
 153         } else {
 154                 printf("  map_ids ");
 155                 for (i = 0; i < info.nr_map_ids; i++)
 156                         printf("%u%s", map_ids[i],
 157                                i == info.nr_map_ids - 1 ? "" : ",");
 158         }
 159 }
 160
 161 static void *find_metadata(int prog_fd, struct bpf_map_info *map_info)
 162 {
 163         struct bpf_prog_info prog_info;
 164         __u32 prog_info_len;
 165         __u32 map_info_len;
 166         void *value = NULL;
 167         __u32 *map_ids;
 168         int nr_maps;
 169         int key = 0;
 170         int map_fd;
 171         int ret;
 172         __u32 i;
 173
 174         memset(&prog_info, 0, sizeof(prog_info));
 175         prog_info_len = sizeof(prog_info);
 176         ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
 177         if (ret)
 178                 return NULL;
 179
 180         if (!prog_info.nr_map_ids)
 181                 return NULL;
 182
 183         map_ids = calloc(prog_info.nr_map_ids, sizeof(__u32));
 184         if (!map_ids)
 185                 return NULL;
 186
 187         nr_maps = prog_info.nr_map_ids;
 188         memset(&prog_info, 0, sizeof(prog_info));
 189         prog_info.nr_map_ids = nr_maps;
 190         prog_info.map_ids = ptr_to_u64(map_ids);
 191         prog_info_len = sizeof(prog_info);
 192
 193         ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
 194         if (ret)
 195                 goto free_map_ids;
 196
 197         for (i = 0; i < prog_info.nr_map_ids; i++) {
 198                 map_fd = bpf_map_get_fd_by_id(map_ids[i]);
 199                 if (map_fd < 0)
 200                         goto free_map_ids;
 201
 202                 memset(map_info, 0, sizeof(*map_info));
 203                 map_info_len = sizeof(*map_info);
 204                 ret = bpf_obj_get_info_by_fd(map_fd, map_info, &map_info_len);
 205                 if (ret < 0) {
 206                         close(map_fd);
 207                         goto free_map_ids;
 208                 }
 209
 210                 if (map_info->type != BPF_MAP_TYPE_ARRAY ||
 211                     map_info->key_size != sizeof(int) ||
 212                     map_info->max_entries != 1 ||
 213                     !map_info->btf_value_type_id ||
 214                     !strstr(map_info->name, ".rodata")) {
 215                         close(map_fd);
 216                         continue;
 217                 }
 218
 219                 value = malloc(map_info->value_size);
 220                 if (!value) {
 221                         close(map_fd);
 222                         goto free_map_ids;
 223                 }
 224
 225                 if (bpf_map_lookup_elem(map_fd, &key, value)) {
 226                         close(map_fd);
 227                         free(value);
 228                         value = NULL;
 229                         goto free_map_ids;
 230                 }
 231
 232                 close(map_fd);
 233                 break;
 234         }
 235
 236 free_map_ids:
 237         free(map_ids);
 238         return value;
 239 }
 240
 241 static bool has_metadata_prefix(const char *s)
 242 {
 243         return strncmp(s, BPF_METADATA_PREFIX, BPF_METADATA_PREFIX_LEN) == 0;
 244 }
 245
 246 static void show_prog_metadata(int fd, __u32 num_maps)
 247 {
 248         const struct btf_type *t_datasec, *t_var;
 249         struct bpf_map_info map_info;
 250         struct btf_var_secinfo *vsi;
 251         bool printed_header = false;
 252         unsigned int i, vlen;
 253         void *value = NULL;
 254         const char *name;
 255         struct btf *btf;
 256         int err;
 257
 258         if (!num_maps)
 259                 return;
 260
 261         memset(&map_info, 0, sizeof(map_info));
 262         value = find_metadata(fd, &map_info);
 263         if (!value)
 264                 return;
 265
 266         btf = btf__load_from_kernel_by_id(map_info.btf_id);
 267         if (libbpf_get_error(btf))
 268                 goto out_free;
 269
 270         t_datasec = btf__type_by_id(btf, map_info.btf_value_type_id);
 271         if (!btf_is_datasec(t_datasec))
 272                 goto out_free;
 273
 274         vlen = btf_vlen(t_datasec);
 275         vsi = btf_var_secinfos(t_datasec);
 276
 277         /* We don't proceed to check the kinds of the elements of the DATASEC.
 278          * The verifier enforces them to be BTF_KIND_VAR.
 279          */
 280
 281         if (json_output) {
 282                 struct btf_dumper d = {
 283                         .btf = btf,
 284                         .jw = json_wtr,
 285                         .is_plain_text = false,
 286                 };
 287
 288                 for (i = 0; i < vlen; i++, vsi++) {
 289                         t_var = btf__type_by_id(btf, vsi->type);
 290                         name = btf__name_by_offset(btf, t_var->name_off);
 291
 292                         if (!has_metadata_prefix(name))
 293                                 continue;
 294
 295                         if (!printed_header) {
 296                                 jsonw_name(json_wtr, "metadata");
 297                                 jsonw_start_object(json_wtr);
 298                                 printed_header = true;
 299                         }
 300
 301                         jsonw_name(json_wtr, name + BPF_METADATA_PREFIX_LEN);
 302                         err = btf_dumper_type(&d, t_var->type, value + vsi->offset);
 303                         if (err) {
 304                                 p_err("btf dump failed: %d", err);
 305                                 break;
 306                         }
 307                 }
 308                 if (printed_header)
 309                         jsonw_end_object(json_wtr);
 310         } else {
 311                 json_writer_t *btf_wtr = jsonw_new(stdout);
 312                 struct btf_dumper d = {
 313                         .btf = btf,
 314                         .jw = btf_wtr,
 315                         .is_plain_text = true,
 316                 };
 317
 318                 if (!btf_wtr) {
 319                         p_err("jsonw alloc failed");
 320                         goto out_free;
 321                 }
 322
 323                 for (i = 0; i < vlen; i++, vsi++) {
 324                         t_var = btf__type_by_id(btf, vsi->type);
 325                         name = btf__name_by_offset(btf, t_var->name_off);
 326
 327                         if (!has_metadata_prefix(name))
 328                                 continue;
 329
 330                         if (!printed_header) {
 331                                 printf("\tmetadata:");
 332                                 printed_header = true;
 333                         }
 334
 335                         printf("\n\t\t%s = ", name + BPF_METADATA_PREFIX_LEN);
 336
 337                         jsonw_reset(btf_wtr);
 338                         err = btf_dumper_type(&d, t_var->type, value + vsi->offset);
 339                         if (err) {
 340                                 p_err("btf dump failed: %d", err);
 341                                 break;
 342                         }
 343                 }
 344                 if (printed_header)
 345                         jsonw_destroy(&btf_wtr);
 346         }
 347
 348 out_free:
 349         btf__free(btf);
 350         free(value);
 351 }
 352
 353 static void print_prog_header_json(struct bpf_prog_info *info)
 354 {
 355         jsonw_uint_field(json_wtr, "id", info->id);
 356         if (info->type < ARRAY_SIZE(prog_type_name))
 357                 jsonw_string_field(json_wtr, "type",
 358                                    prog_type_name[info->type]);
 359         else
 360                 jsonw_uint_field(json_wtr, "type", info->type);
 361
 362         if (*info->name)
 363                 jsonw_string_field(json_wtr, "name", info->name);
 364
 365         jsonw_name(json_wtr, "tag");
 366         jsonw_printf(json_wtr, "\"" BPF_TAG_FMT "\"",
 367                      info->tag[0], info->tag[1], info->tag[2], info->tag[3],
 368                      info->tag[4], info->tag[5], info->tag[6], info->tag[7]);
 369
 370         jsonw_bool_field(json_wtr, "gpl_compatible", info->gpl_compatible);
 371         if (info->run_time_ns) {
 372                 jsonw_uint_field(json_wtr, "run_time_ns", info->run_time_ns);
 373                 jsonw_uint_field(json_wtr, "run_cnt", info->run_cnt);
 374         }
 375         if (info->recursion_misses)
 376                 jsonw_uint_field(json_wtr, "recursion_misses", info->recursion_misses);
 377 }
 378
 379 static void print_prog_json(struct bpf_prog_info *info, int fd)
 380 {
 381         char *memlock;
 382
 383         jsonw_start_object(json_wtr);
 384         print_prog_header_json(info);
 385         print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);
 386
 387         if (info->load_time) {
 388                 char buf[32];
 389
 390                 print_boot_time(info->load_time, buf, sizeof(buf));
 391
 392                 /* Piggy back on load_time, since 0 uid is a valid one */
 393                 jsonw_name(json_wtr, "loaded_at");
 394                 jsonw_printf(json_wtr, "%s", buf);
 395                 jsonw_uint_field(json_wtr, "uid", info->created_by_uid);
 396         }
 397
 398         jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len);
 399
 400         if (info->jited_prog_len) {
 401                 jsonw_bool_field(json_wtr, "jited", true);
 402                 jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len);
 403         } else {
 404                 jsonw_bool_field(json_wtr, "jited", false);
 405         }
 406
 407         memlock = get_fdinfo(fd, "memlock");
 408         if (memlock)
 409                 jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
 410         free(memlock);
 411
 412         if (info->nr_map_ids)
 413                 show_prog_maps(fd, info->nr_map_ids);
 414
 415         if (info->btf_id)
 416                 jsonw_int_field(json_wtr, "btf_id", info->btf_id);
 417
 418         if (!hash_empty(prog_table.table)) {
 419                 struct pinned_obj *obj;
 420
 421                 jsonw_name(json_wtr, "pinned");
 422                 jsonw_start_array(json_wtr);
 423                 hash_for_each_possible(prog_table.table, obj, hash, info->id) {
 424                         if (obj->id == info->id)
 425                                 jsonw_string(json_wtr, obj->path);
 426                 }
 427                 jsonw_end_array(json_wtr);
 428         }
 429
 430         emit_obj_refs_json(&refs_table, info->id, json_wtr);
 431
 432         show_prog_metadata(fd, info->nr_map_ids);
 433
 434         jsonw_end_object(json_wtr);
 435 }
 436
 437 static void print_prog_header_plain(struct bpf_prog_info *info)
 438 {
 439         printf("%u: ", info->id);
 440         if (info->type < ARRAY_SIZE(prog_type_name))
 441                 printf("%s  ", prog_type_name[info->type]);
 442         else
 443                 printf("type %u  ", info->type);
 444
 445         if (*info->name)
 446                 printf("name %s  ", info->name);
 447
 448         printf("tag ");
 449         fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");
 450         print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
 451         printf("%s", info->gpl_compatible ? "  gpl" : "");
 452         if (info->run_time_ns)
 453                 printf(" run_time_ns %lld run_cnt %lld",
 454                        info->run_time_ns, info->run_cnt);
 455         if (info->recursion_misses)
 456                 printf(" recursion_misses %lld", info->recursion_misses);
 457         printf("\n");
 458 }
 459
 460 static void print_prog_plain(struct bpf_prog_info *info, int fd)
 461 {
 462         char *memlock;
 463
 464         print_prog_header_plain(info);
 465
 466         if (info->load_time) {
 467                 char buf[32];
 468
 469                 print_boot_time(info->load_time, buf, sizeof(buf));
 470
 471                 /* Piggy back on load_time, since 0 uid is a valid one */
 472                 printf("\tloaded_at %s  uid %u\n", buf, info->created_by_uid);
 473         }
 474
 475         printf("\txlated %uB", info->xlated_prog_len);
 476
 477         if (info->jited_prog_len)
 478                 printf("  jited %uB", info->jited_prog_len);
 479         else
 480                 printf("  not jited");
 481
 482         memlock = get_fdinfo(fd, "memlock");
 483         if (memlock)
 484                 printf("  memlock %sB", memlock);
 485         free(memlock);
 486
 487         if (info->nr_map_ids)
 488                 show_prog_maps(fd, info->nr_map_ids);
 489
 490         if (!hash_empty(prog_table.table)) {
 491                 struct pinned_obj *obj;
 492
 493                 hash_for_each_possible(prog_table.table, obj, hash, info->id) {
 494                         if (obj->id == info->id)
 495                                 printf("\n\tpinned %s", obj->path);
 496                 }
 497         }
 498
 499         if (info->btf_id)
 500                 printf("\n\tbtf_id %d", info->btf_id);
 501
 502         emit_obj_refs_plain(&refs_table, info->id, "\n\tpids ");
 503
 504         printf("\n");
 505
 506         show_prog_metadata(fd, info->nr_map_ids);
 507 }
 508
 509 static int show_prog(int fd)
 510 {
 511         struct bpf_prog_info info = {};
 512         __u32 len = sizeof(info);
 513         int err;
 514
 515         err = bpf_obj_get_info_by_fd(fd, &info, &len);
 516         if (err) {
 517                 p_err("can't get prog info: %s", strerror(errno));
 518                 return -1;
 519         }
 520
 521         if (json_output)
 522                 print_prog_json(&info, fd);
 523         else
 524                 print_prog_plain(&info, fd);
 525
 526         return 0;
 527 }
 528
 529 static int do_show_subset(int argc, char **argv)
 530 {
 531         int *fds = NULL;
 532         int nb_fds, i;
 533         int err = -1;
 534
 535         fds = malloc(sizeof(int));
 536         if (!fds) {
 537                 p_err("mem alloc failed");
 538                 return -1;
 539         }
 540         nb_fds = prog_parse_fds(&argc, &argv, &fds);
 541         if (nb_fds < 1)
 542                 goto exit_free;
 543
 544         if (json_output && nb_fds > 1)
 545                 jsonw_start_array(json_wtr);    /* root array */
 546         for (i = 0; i < nb_fds; i++) {
 547                 err = show_prog(fds[i]);
 548                 if (err) {
 549                         for (; i < nb_fds; i++)
 550                                 close(fds[i]);
 551                         break;
 552                 }
 553                 close(fds[i]);
 554         }
 555         if (json_output && nb_fds > 1)
 556                 jsonw_end_array(json_wtr);      /* root array */
 557
 558 exit_free:
 559         free(fds);
 560         return err;
 561 }
 562
 563 static int do_show(int argc, char **argv)
 564 {
 565         __u32 id = 0;
 566         int err;
 567         int fd;
 568
 569         if (show_pinned)
 570                 build_pinned_obj_table(&prog_table, BPF_OBJ_PROG);
 571         build_obj_refs_table(&refs_table, BPF_OBJ_PROG);
 572
 573         if (argc == 2)
 574                 return do_show_subset(argc, argv);
 575
 576         if (argc)
 577                 return BAD_ARG();
 578
 579         if (json_output)
 580                 jsonw_start_array(json_wtr);
 581         while (true) {
 582                 err = bpf_prog_get_next_id(id, &id);
 583                 if (err) {
 584                         if (errno == ENOENT) {
 585                                 err = 0;
 586                                 break;
 587                         }
 588                         p_err("can't get next program: %s%s", strerror(errno),
 589                               errno == EINVAL ? " -- kernel too old?" : "");
 590                         err = -1;
 591                         break;
 592                 }
 593
 594                 fd = bpf_prog_get_fd_by_id(id);
 595                 if (fd < 0) {
 596                         if (errno == ENOENT)
 597                                 continue;
 598                         p_err("can't get prog by id (%u): %s",
 599                               id, strerror(errno));
 600                         err = -1;
 601                         break;
 602                 }
 603
 604                 err = show_prog(fd);
 605                 close(fd);
 606                 if (err)
 607                         break;
 608         }
 609
 610         if (json_output)
 611                 jsonw_end_array(json_wtr);
 612
 613         delete_obj_refs_table(&refs_table);
 614
 615         return err;
 616 }
 617
 618 static int
 619 prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
 620           char *filepath, bool opcodes, bool visual, bool linum)
 621 {
 622         struct bpf_prog_linfo *prog_linfo = NULL;
 623         const char *disasm_opt = NULL;
 624         struct dump_data dd = {};
 625         void *func_info = NULL;
 626         struct btf *btf = NULL;
 627         char func_sig[1024];
 628         unsigned char *buf;
 629         __u32 member_len;
 630         ssize_t n;
 631         int fd;
 632
 633         if (mode == DUMP_JITED) {
 634                 if (info->jited_prog_len == 0 || !info->jited_prog_insns) {
 635                         p_info("no instructions returned");
 636                         return -1;
 637                 }
 638                 buf = u64_to_ptr(info->jited_prog_insns);
 639                 member_len = info->jited_prog_len;
 640         } else {        /* DUMP_XLATED */
 641                 if (info->xlated_prog_len == 0 || !info->xlated_prog_insns) {
 642                         p_err("error retrieving insn dump: kernel.kptr_restrict set?");
 643                         return -1;
 644                 }
 645                 buf = u64_to_ptr(info->xlated_prog_insns);
 646                 member_len = info->xlated_prog_len;
 647         }
 648
 649         if (info->btf_id) {
 650                 btf = btf__load_from_kernel_by_id(info->btf_id);
 651                 if (libbpf_get_error(btf)) {
 652                         p_err("failed to get btf");
 653                         return -1;
 654                 }
 655         }
 656
 657         func_info = u64_to_ptr(info->func_info);
 658
 659         if (info->nr_line_info) {
 660                 prog_linfo = bpf_prog_linfo__new(info);
 661                 if (!prog_linfo)
 662                         p_info("error in processing bpf_line_info.  continue without it.");
 663         }
 664
 665         if (filepath) {
 666                 fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
 667                 if (fd < 0) {
 668                         p_err("can't open file %s: %s", filepath,
 669                               strerror(errno));
 670                         return -1;
 671                 }
 672
 673                 n = write(fd, buf, member_len);
 674                 close(fd);
 675                 if (n != (ssize_t)member_len) {
 676                         p_err("error writing output file: %s",
 677                               n < 0 ? strerror(errno) : "short write");
 678                         return -1;
 679                 }
 680
 681                 if (json_output)
 682                         jsonw_null(json_wtr);
 683         } else if (mode == DUMP_JITED) {
 684                 const char *name = NULL;
 685
 686                 if (info->ifindex) {
 687                         name = ifindex_to_bfd_params(info->ifindex,
 688                                                      info->netns_dev,
 689                                                      info->netns_ino,
 690                                                      &disasm_opt);
 691                         if (!name)
 692                                 return -1;
 693                 }
 694
 695                 if (info->nr_jited_func_lens && info->jited_func_lens) {
 696                         struct kernel_sym *sym = NULL;
 697                         struct bpf_func_info *record;
 698                         char sym_name[SYM_MAX_NAME];
 699                         unsigned char *img = buf;
 700                         __u64 *ksyms = NULL;
 701                         __u32 *lens;
 702                         __u32 i;
 703                         if (info->nr_jited_ksyms) {
 704                                 kernel_syms_load(&dd);
 705                                 ksyms = u64_to_ptr(info->jited_ksyms);
 706                         }
 707
 708                         if (json_output)
 709                                 jsonw_start_array(json_wtr);
 710
 711                         lens = u64_to_ptr(info->jited_func_lens);
 712                         for (i = 0; i < info->nr_jited_func_lens; i++) {
 713                                 if (ksyms) {
 714                                         sym = kernel_syms_search(&dd, ksyms[i]);
 715                                         if (sym)
 716                                                 sprintf(sym_name, "%s", sym->name);
 717                                         else
 718                                                 sprintf(sym_name, "0x%016llx", ksyms[i]);
 719                                 } else {
 720                                         strcpy(sym_name, "unknown");
 721                                 }
 722
 723                                 if (func_info) {
 724                                         record = func_info + i * info->func_info_rec_size;
 725                                         btf_dumper_type_only(btf, record->type_id,
 726                                                              func_sig,
 727                                                              sizeof(func_sig));
 728                                 }
 729
 730                                 if (json_output) {
 731                                         jsonw_start_object(json_wtr);
 732                                         if (func_info && func_sig[0] != '\0') {
 733                                                 jsonw_name(json_wtr, "proto");
 734                                                 jsonw_string(json_wtr, func_sig);
 735                                         }
 736                                         jsonw_name(json_wtr, "name");
 737                                         jsonw_string(json_wtr, sym_name);
 738                                         jsonw_name(json_wtr, "insns");
 739                                 } else {
 740                                         if (func_info && func_sig[0] != '\0')
 741                                                 printf("%s:\n", func_sig);
 742                                         printf("%s:\n", sym_name);
 743                                 }
 744
 745                                 disasm_print_insn(img, lens[i], opcodes,
 746                                                   name, disasm_opt, btf,
 747                                                   prog_linfo, ksyms[i], i,
 748                                                   linum);
 749
 750                                 img += lens[i];
 751
 752                                 if (json_output)
 753                                         jsonw_end_object(json_wtr);
 754                                 else
 755                                         printf("\n");
 756                         }
 757
 758                         if (json_output)
 759                                 jsonw_end_array(json_wtr);
 760                 } else {
 761                         disasm_print_insn(buf, member_len, opcodes, name,
 762                                           disasm_opt, btf, NULL, 0, 0, false);
 763                 }
 764         } else if (visual) {
 765                 if (json_output)
 766                         jsonw_null(json_wtr);
 767                 else
 768                         dump_xlated_cfg(buf, member_len);
 769         } else {
 770                 kernel_syms_load(&dd);
 771                 dd.nr_jited_ksyms = info->nr_jited_ksyms;
 772                 dd.jited_ksyms = u64_to_ptr(info->jited_ksyms);
 773                 dd.btf = btf;
 774                 dd.func_info = func_info;
 775                 dd.finfo_rec_size = info->func_info_rec_size;
 776                 dd.prog_linfo = prog_linfo;
 777
 778                 if (json_output)
 779                         dump_xlated_json(&dd, buf, member_len, opcodes,
 780                                          linum);
 781                 else
 782                         dump_xlated_plain(&dd, buf, member_len, opcodes,
 783                                           linum);
 784                 kernel_syms_destroy(&dd);
 785         }
 786
 787         btf__free(btf);
 788
 789         return 0;
 790 }
 791
 792 static int do_dump(int argc, char **argv)
 793 {
 794         struct bpf_prog_info_linear *info_linear;
 795         char *filepath = NULL;
 796         bool opcodes = false;
 797         bool visual = false;
 798         enum dump_mode mode;
 799         bool linum = false;
 800         int *fds = NULL;
 801         int nb_fds, i = 0;
 802         int err = -1;
 803         __u64 arrays;
 804
 805         if (is_prefix(*argv, "jited")) {
 806                 if (disasm_init())
 807                         return -1;
 808                 mode = DUMP_JITED;
 809         } else if (is_prefix(*argv, "xlated")) {
 810                 mode = DUMP_XLATED;
 811         } else {
 812                 p_err("expected 'xlated' or 'jited', got: %s", *argv);
 813                 return -1;
 814         }
 815         NEXT_ARG();
 816
 817         if (argc < 2)
 818                 usage();
 819
 820         fds = malloc(sizeof(int));
 821         if (!fds) {
 822                 p_err("mem alloc failed");
 823                 return -1;
 824         }
 825         nb_fds = prog_parse_fds(&argc, &argv, &fds);
 826         if (nb_fds < 1)
 827                 goto exit_free;
 828
 829         if (is_prefix(*argv, "file")) {
 830                 NEXT_ARG();
 831                 if (!argc) {
 832                         p_err("expected file path");
 833                         goto exit_close;
 834                 }
 835                 if (nb_fds > 1) {
 836                         p_err("several programs matched");
 837                         goto exit_close;
 838                 }
 839
 840                 filepath = *argv;
 841                 NEXT_ARG();
 842         } else if (is_prefix(*argv, "opcodes")) {
 843                 opcodes = true;
 844                 NEXT_ARG();
 845         } else if (is_prefix(*argv, "visual")) {
 846                 if (nb_fds > 1) {
 847                         p_err("several programs matched");
 848                         goto exit_close;
 849                 }
 850
 851                 visual = true;
 852                 NEXT_ARG();
 853         } else if (is_prefix(*argv, "linum")) {
 854                 linum = true;
 855                 NEXT_ARG();
 856         }
 857
 858         if (argc) {
 859                 usage();
 860                 goto exit_close;
 861         }
 862
 863         if (mode == DUMP_JITED)
 864                 arrays = 1UL << BPF_PROG_INFO_JITED_INSNS;
 865         else
 866                 arrays = 1UL << BPF_PROG_INFO_XLATED_INSNS;
 867
 868         arrays |= 1UL << BPF_PROG_INFO_JITED_KSYMS;
 869         arrays |= 1UL << BPF_PROG_INFO_JITED_FUNC_LENS;
 870         arrays |= 1UL << BPF_PROG_INFO_FUNC_INFO;
 871         arrays |= 1UL << BPF_PROG_INFO_LINE_INFO;
 872         arrays |= 1UL << BPF_PROG_INFO_JITED_LINE_INFO;
 873
 874         if (json_output && nb_fds > 1)
 875                 jsonw_start_array(json_wtr);    /* root array */
 876         for (i = 0; i < nb_fds; i++) {
 877                 info_linear = bpf_program__get_prog_info_linear(fds[i], arrays);
 878                 if (IS_ERR_OR_NULL(info_linear)) {
 879                         p_err("can't get prog info: %s", strerror(errno));
 880                         break;
 881                 }
 882
 883                 if (json_output && nb_fds > 1) {
 884                         jsonw_start_object(json_wtr);   /* prog object */
 885                         print_prog_header_json(&info_linear->info);
 886                         jsonw_name(json_wtr, "insns");
 887                 } else if (nb_fds > 1) {
 888                         print_prog_header_plain(&info_linear->info);
 889                 }
 890
 891                 err = prog_dump(&info_linear->info, mode, filepath, opcodes,
 892                                 visual, linum);
 893
 894                 if (json_output && nb_fds > 1)
 895                         jsonw_end_object(json_wtr);     /* prog object */
 896                 else if (i != nb_fds - 1 && nb_fds > 1)
 897                         printf("\n");
 898
 899                 free(info_linear);
 900                 if (err)
 901                         break;
 902                 close(fds[i]);
 903         }
 904         if (json_output && nb_fds > 1)
 905                 jsonw_end_array(json_wtr);      /* root array */
 906
 907 exit_close:
 908         for (; i < nb_fds; i++)
 909                 close(fds[i]);
 910 exit_free:
 911         free(fds);
 912         return err;
 913 }
 914
 915 static int do_pin(int argc, char **argv)
 916 {
 917         int err;
 918
 919         err = do_pin_any(argc, argv, prog_parse_fd);
 920         if (!err && json_output)
 921                 jsonw_null(json_wtr);
 922         return err;
 923 }
 924
 925 struct map_replace {
 926         int idx;
 927         int fd;
 928         char *name;
 929 };
 930
 931 static int map_replace_compar(const void *p1, const void *p2)
 932 {
 933         const struct map_replace *a = p1, *b = p2;
 934
 935         return a->idx - b->idx;
 936 }
 937
 938 static int parse_attach_detach_args(int argc, char **argv, int *progfd,
 939                                     enum bpf_attach_type *attach_type,
 940                                     int *mapfd)
 941 {
 942         if (!REQ_ARGS(3))
 943                 return -EINVAL;
 944
 945         *progfd = prog_parse_fd(&argc, &argv);
 946         if (*progfd < 0)
 947                 return *progfd;
 948
 949         *attach_type = parse_attach_type(*argv);
 950         if (*attach_type == __MAX_BPF_ATTACH_TYPE) {
 951                 p_err("invalid attach/detach type");
 952                 return -EINVAL;
 953         }
 954
 955         if (*attach_type == BPF_FLOW_DISSECTOR) {
 956                 *mapfd = 0;
 957                 return 0;
 958         }
 959
 960         NEXT_ARG();
 961         if (!REQ_ARGS(2))
 962                 return -EINVAL;
 963
 964         *mapfd = map_parse_fd(&argc, &argv);
 965         if (*mapfd < 0)
 966                 return *mapfd;
 967
 968         return 0;
 969 }
 970
 971 static int do_attach(int argc, char **argv)
 972 {
 973         enum bpf_attach_type attach_type;
 974         int err, progfd;
 975         int mapfd;
 976
 977         err = parse_attach_detach_args(argc, argv,
 978                                        &progfd, &attach_type, &mapfd);
 979         if (err)
 980                 return err;
 981
 982         err = bpf_prog_attach(progfd, mapfd, attach_type, 0);
 983         if (err) {
 984                 p_err("failed prog attach to map");
 985                 return -EINVAL;
 986         }
 987
 988         if (json_output)
 989                 jsonw_null(json_wtr);
 990         return 0;
 991 }
 992
 993 static int do_detach(int argc, char **argv)
 994 {
 995         enum bpf_attach_type attach_type;
 996         int err, progfd;
 997         int mapfd;
 998
 999         err = parse_attach_detach_args(argc, argv,
1000                                        &progfd, &attach_type, &mapfd);
1001         if (err)
1002                 return err;
1003
1004         err = bpf_prog_detach2(progfd, mapfd, attach_type);
1005         if (err) {
1006                 p_err("failed prog detach from map");
1007                 return -EINVAL;
1008         }
1009
1010         if (json_output)
1011                 jsonw_null(json_wtr);
1012         return 0;
1013 }
1014
1015 static int check_single_stdin(char *file_data_in, char *file_ctx_in)
1016 {
1017         if (file_data_in && file_ctx_in &&
1018             !strcmp(file_data_in, "-") && !strcmp(file_ctx_in, "-")) {
1019                 p_err("cannot use standard input for both data_in and ctx_in");
1020                 return -1;
1021         }
1022
1023         return 0;
1024 }
1025
1026 static int get_run_data(const char *fname, void **data_ptr, unsigned int *size)
1027 {
1028         size_t block_size = 256;
1029         size_t buf_size = block_size;
1030         size_t nb_read = 0;
1031         void *tmp;
1032         FILE *f;
1033
1034         if (!fname) {
1035                 *data_ptr = NULL;
1036                 *size = 0;
1037                 return 0;
1038         }
1039
1040         if (!strcmp(fname, "-"))
1041                 f = stdin;
1042         else
1043                 f = fopen(fname, "r");
1044         if (!f) {
1045                 p_err("failed to open %s: %s", fname, strerror(errno));
1046                 return -1;
1047         }
1048
1049         *data_ptr = malloc(block_size);
1050         if (!*data_ptr) {
1051                 p_err("failed to allocate memory for data_in/ctx_in: %s",
1052                       strerror(errno));
1053                 goto err_fclose;
1054         }
1055
1056         while ((nb_read += fread(*data_ptr + nb_read, 1, block_size, f))) {
1057                 if (feof(f))
1058                         break;
1059                 if (ferror(f)) {
1060                         p_err("failed to read data_in/ctx_in from %s: %s",
1061                               fname, strerror(errno));
1062                         goto err_free;
1063                 }
1064                 if (nb_read > buf_size - block_size) {
1065                         if (buf_size == UINT32_MAX) {
1066                                 p_err("data_in/ctx_in is too long (max: %d)",
1067                                       UINT32_MAX);
1068                                 goto err_free;
1069                         }
1070                         /* No space for fread()-ing next chunk; realloc() */
1071                         buf_size *= 2;
1072                         tmp = realloc(*data_ptr, buf_size);
1073                         if (!tmp) {
1074                                 p_err("failed to reallocate data_in/ctx_in: %s",
1075                                       strerror(errno));
1076                                 goto err_free;
1077                         }
1078                         *data_ptr = tmp;
1079                 }
1080         }
1081         if (f != stdin)
1082                 fclose(f);
1083
1084         *size = nb_read;
1085         return 0;
1086
1087 err_free:
1088         free(*data_ptr);
1089         *data_ptr = NULL;
1090 err_fclose:
1091         if (f != stdin)
1092                 fclose(f);
1093         return -1;
1094 }
1095
1096 static void hex_print(void *data, unsigned int size, FILE *f)
1097 {
1098         size_t i, j;
1099         char c;
1100
1101         for (i = 0; i < size; i += 16) {
1102                 /* Row offset */
1103                 fprintf(f, "%07zx\t", i);
1104
1105                 /* Hexadecimal values */
1106                 for (j = i; j < i + 16 && j < size; j++)
1107                         fprintf(f, "%02x%s", *(uint8_t *)(data + j),
1108                                 j % 2 ? " " : "");
1109                 for (; j < i + 16; j++)
1110                         fprintf(f, "  %s", j % 2 ? " " : "");
1111
1112                 /* ASCII values (if relevant), '.' otherwise */
1113                 fprintf(f, "| ");
1114                 for (j = i; j < i + 16 && j < size; j++) {
1115                         c = *(char *)(data + j);
1116                         if (c < ' ' || c > '~')
1117                                 c = '.';
1118                         fprintf(f, "%c%s", c, j == i + 7 ? " " : "");
1119                 }
1120
1121                 fprintf(f, "\n");
1122         }
1123 }
1124
1125 static int
1126 print_run_output(void *data, unsigned int size, const char *fname,
1127                  const char *json_key)
1128 {
1129         size_t nb_written;
1130         FILE *f;
1131
1132         if (!fname)
1133                 return 0;
1134
1135         if (!strcmp(fname, "-")) {
1136                 f = stdout;
1137                 if (json_output) {
1138                         jsonw_name(json_wtr, json_key);
1139                         print_data_json(data, size);
1140                 } else {
1141                         hex_print(data, size, f);
1142                 }
1143                 return 0;
1144         }
1145
1146         f = fopen(fname, "w");
1147         if (!f) {
1148                 p_err("failed to open %s: %s", fname, strerror(errno));
1149                 return -1;
1150         }
1151
1152         nb_written = fwrite(data, 1, size, f);
1153         fclose(f);
1154         if (nb_written != size) {
1155                 p_err("failed to write output data/ctx: %s", strerror(errno));
1156                 return -1;
1157         }
1158
1159         return 0;
1160 }
1161
1162 static int alloc_run_data(void **data_ptr, unsigned int size_out)
1163 {
1164         *data_ptr = calloc(size_out, 1);
1165         if (!*data_ptr) {
1166                 p_err("failed to allocate memory for output data/ctx: %s",
1167                       strerror(errno));
1168                 return -1;
1169         }
1170
1171         return 0;
1172 }
1173
1174 static int do_run(int argc, char **argv)
1175 {
1176         char *data_fname_in = NULL, *data_fname_out = NULL;
1177         char *ctx_fname_in = NULL, *ctx_fname_out = NULL;
1178         struct bpf_prog_test_run_attr test_attr = {0};
1179         const unsigned int default_size = SZ_32K;
1180         void *data_in = NULL, *data_out = NULL;
1181         void *ctx_in = NULL, *ctx_out = NULL;
1182         unsigned int repeat = 1;
1183         int fd, err;
1184
1185         if (!REQ_ARGS(4))
1186                 return -1;
1187
1188         fd = prog_parse_fd(&argc, &argv);
1189         if (fd < 0)
1190                 return -1;
1191
1192         while (argc) {
1193                 if (detect_common_prefix(*argv, "data_in", "data_out",
1194                                          "data_size_out", NULL))
1195                         return -1;
1196                 if (detect_common_prefix(*argv, "ctx_in", "ctx_out",
1197                                          "ctx_size_out", NULL))
1198                         return -1;
1199
1200                 if (is_prefix(*argv, "data_in")) {
1201                         NEXT_ARG();
1202                         if (!REQ_ARGS(1))
1203                                 return -1;
1204
1205                         data_fname_in = GET_ARG();
1206                         if (check_single_stdin(data_fname_in, ctx_fname_in))
1207                                 return -1;
1208                 } else if (is_prefix(*argv, "data_out")) {
1209                         NEXT_ARG();
1210                         if (!REQ_ARGS(1))
1211                                 return -1;
1212
1213                         data_fname_out = GET_ARG();
1214                 } else if (is_prefix(*argv, "data_size_out")) {
1215                         char *endptr;
1216
1217                         NEXT_ARG();
1218                         if (!REQ_ARGS(1))
1219                                 return -1;
1220
1221                         test_attr.data_size_out = strtoul(*argv, &endptr, 0);
1222                         if (*endptr) {
1223                                 p_err("can't parse %s as output data size",
1224                                       *argv);
1225                                 return -1;
1226                         }
1227                         NEXT_ARG();
1228                 } else if (is_prefix(*argv, "ctx_in")) {
1229                         NEXT_ARG();
1230                         if (!REQ_ARGS(1))
1231                                 return -1;
1232
1233                         ctx_fname_in = GET_ARG();
1234                         if (check_single_stdin(data_fname_in, ctx_fname_in))
1235                                 return -1;
1236                 } else if (is_prefix(*argv, "ctx_out")) {
1237                         NEXT_ARG();
1238                         if (!REQ_ARGS(1))
1239                                 return -1;
1240
1241                         ctx_fname_out = GET_ARG();
1242                 } else if (is_prefix(*argv, "ctx_size_out")) {
1243                         char *endptr;
1244
1245                         NEXT_ARG();
1246                         if (!REQ_ARGS(1))
1247                                 return -1;
1248
1249                         test_attr.ctx_size_out = strtoul(*argv, &endptr, 0);
1250                         if (*endptr) {
1251                                 p_err("can't parse %s as output context size",
1252                                       *argv);
1253                                 return -1;
1254                         }
1255                         NEXT_ARG();
1256                 } else if (is_prefix(*argv, "repeat")) {
1257                         char *endptr;
1258
1259                         NEXT_ARG();
1260                         if (!REQ_ARGS(1))
1261                                 return -1;
1262
1263                         repeat = strtoul(*argv, &endptr, 0);
1264                         if (*endptr) {
1265                                 p_err("can't parse %s as repeat number",
1266                                       *argv);
1267                                 return -1;
1268                         }
1269                         NEXT_ARG();
1270                 } else {
1271                         p_err("expected no more arguments, 'data_in', 'data_out', 'data_size_out', 'ctx_in', 'ctx_out', 'ctx_size_out' or 'repeat', got: '%s'?",
1272                               *argv);
1273                         return -1;
1274                 }
1275         }
1276
1277         err = get_run_data(data_fname_in, &data_in, &test_attr.data_size_in);
1278         if (err)
1279                 return -1;
1280
1281         if (data_in) {
1282                 if (!test_attr.data_size_out)
1283                         test_attr.data_size_out = default_size;
1284                 err = alloc_run_data(&data_out, test_attr.data_size_out);
1285                 if (err)
1286                         goto free_data_in;
1287         }
1288
1289         err = get_run_data(ctx_fname_in, &ctx_in, &test_attr.ctx_size_in);
1290         if (err)
1291                 goto free_data_out;
1292
1293         if (ctx_in) {
1294                 if (!test_attr.ctx_size_out)
1295                         test_attr.ctx_size_out = default_size;
1296                 err = alloc_run_data(&ctx_out, test_attr.ctx_size_out);
1297                 if (err)
1298                         goto free_ctx_in;
1299         }
1300
1301         test_attr.prog_fd       = fd;
1302         test_attr.repeat        = repeat;
1303         test_attr.data_in       = data_in;
1304         test_attr.data_out      = data_out;
1305         test_attr.ctx_in        = ctx_in;
1306         test_attr.ctx_out       = ctx_out;
1307
1308         err = bpf_prog_test_run_xattr(&test_attr);
1309         if (err) {
1310                 p_err("failed to run program: %s", strerror(errno));
1311                 goto free_ctx_out;
1312         }
1313
1314         err = 0;
1315
1316         if (json_output)
1317                 jsonw_start_object(json_wtr);   /* root */
1318
1319         /* Do not exit on errors occurring when printing output data/context,
1320          * we still want to print return value and duration for program run.
1321          */
1322         if (test_attr.data_size_out)
1323                 err += print_run_output(test_attr.data_out,
1324                                         test_attr.data_size_out,
1325                                         data_fname_out, "data_out");
1326         if (test_attr.ctx_size_out)
1327                 err += print_run_output(test_attr.ctx_out,
1328                                         test_attr.ctx_size_out,
1329                                         ctx_fname_out, "ctx_out");
1330
1331         if (json_output) {
1332                 jsonw_uint_field(json_wtr, "retval", test_attr.retval);
1333                 jsonw_uint_field(json_wtr, "duration", test_attr.duration);
1334                 jsonw_end_object(json_wtr);     /* root */
1335         } else {
1336                 fprintf(stdout, "Return value: %u, duration%s: %uns\n",
1337                         test_attr.retval,
1338                         repeat > 1 ? " (average)" : "", test_attr.duration);
1339         }
1340
1341 free_ctx_out:
1342         free(ctx_out);
1343 free_ctx_in:
1344         free(ctx_in);
1345 free_data_out:
1346         free(data_out);
1347 free_data_in:
1348         free(data_in);
1349
1350         return err;
1351 }
1352
1353 static int
1354 get_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type,
1355                       enum bpf_attach_type *expected_attach_type)
1356 {
1357         libbpf_print_fn_t print_backup;
1358         int ret;
1359
1360         ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
1361         if (!ret)
1362                 return ret;
1363
1364         /* libbpf_prog_type_by_name() failed, let's re-run with debug level */
1365         print_backup = libbpf_set_print(print_all_levels);
1366         ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
1367         libbpf_set_print(print_backup);
1368
1369         return ret;
1370 }
1371
1372 static int load_with_options(int argc, char **argv, bool first_prog_only)
1373 {
1374         enum bpf_prog_type common_prog_type = BPF_PROG_TYPE_UNSPEC;
1375         DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts,
1376                 .relaxed_maps = relaxed_maps,
1377         );
1378         struct bpf_object_load_attr load_attr = { 0 };
1379         enum bpf_attach_type expected_attach_type;
1380         struct map_replace *map_replace = NULL;
1381         struct bpf_program *prog = NULL, *pos;
1382         unsigned int old_map_fds = 0;
1383         const char *pinmaps = NULL;
1384         struct bpf_object *obj;
1385         struct bpf_map *map;
1386         const char *pinfile;
1387         unsigned int i, j;
1388         __u32 ifindex = 0;
1389         const char *file;
1390         int idx, err;
1391
1392
1393         if (!REQ_ARGS(2))
1394                 return -1;
1395         file = GET_ARG();
1396         pinfile = GET_ARG();
1397
1398         while (argc) {
1399                 if (is_prefix(*argv, "type")) {
1400                         char *type;
1401
1402                         NEXT_ARG();
1403
1404                         if (common_prog_type != BPF_PROG_TYPE_UNSPEC) {
1405                                 p_err("program type already specified");
1406                                 goto err_free_reuse_maps;
1407                         }
1408                         if (!REQ_ARGS(1))
1409                                 goto err_free_reuse_maps;
1410
1411                         /* Put a '/' at the end of type to appease libbpf */
1412                         type = malloc(strlen(*argv) + 2);
1413                         if (!type) {
1414                                 p_err("mem alloc failed");
1415                                 goto err_free_reuse_maps;
1416                         }
1417                         *type = 0;
1418                         strcat(type, *argv);
1419                         strcat(type, "/");
1420
1421                         err = get_prog_type_by_name(type, &common_prog_type,
1422                                                     &expected_attach_type);
1423                         free(type);
1424                         if (err < 0)
1425                                 goto err_free_reuse_maps;
1426
1427                         NEXT_ARG();
1428                 } else if (is_prefix(*argv, "map")) {
1429                         void *new_map_replace;
1430                         char *endptr, *name;
1431                         int fd;
1432
1433                         NEXT_ARG();
1434
1435                         if (!REQ_ARGS(4))
1436                                 goto err_free_reuse_maps;
1437
1438                         if (is_prefix(*argv, "idx")) {
1439                                 NEXT_ARG();
1440
1441                                 idx = strtoul(*argv, &endptr, 0);
1442                                 if (*endptr) {
1443                                         p_err("can't parse %s as IDX", *argv);
1444                                         goto err_free_reuse_maps;
1445                                 }
1446                                 name = NULL;
1447                         } else if (is_prefix(*argv, "name")) {
1448                                 NEXT_ARG();
1449
1450                                 name = *argv;
1451                                 idx = -1;
1452                         } else {
1453                                 p_err("expected 'idx' or 'name', got: '%s'?",
1454                                       *argv);
1455                                 goto err_free_reuse_maps;
1456                         }
1457                         NEXT_ARG();
1458
1459                         fd = map_parse_fd(&argc, &argv);
1460                         if (fd < 0)
1461                                 goto err_free_reuse_maps;
1462
1463                         new_map_replace = reallocarray(map_replace,
1464                                                        old_map_fds + 1,
1465                                                        sizeof(*map_replace));
1466                         if (!new_map_replace) {
1467                                 p_err("mem alloc failed");
1468                                 goto err_free_reuse_maps;
1469                         }
1470                         map_replace = new_map_replace;
1471
1472                         map_replace[old_map_fds].idx = idx;
1473                         map_replace[old_map_fds].name = name;
1474                         map_replace[old_map_fds].fd = fd;
1475                         old_map_fds++;
1476                 } else if (is_prefix(*argv, "dev")) {
1477                         NEXT_ARG();
1478
1479                         if (ifindex) {
1480                                 p_err("offload device already specified");
1481                                 goto err_free_reuse_maps;
1482                         }
1483                         if (!REQ_ARGS(1))
1484                                 goto err_free_reuse_maps;
1485
1486                         ifindex = if_nametoindex(*argv);
1487                         if (!ifindex) {
1488                                 p_err("unrecognized netdevice '%s': %s",
1489                                       *argv, strerror(errno));
1490                                 goto err_free_reuse_maps;
1491                         }
1492                         NEXT_ARG();
1493                 } else if (is_prefix(*argv, "pinmaps")) {
1494                         NEXT_ARG();
1495
1496                         if (!REQ_ARGS(1))
1497                                 goto err_free_reuse_maps;
1498
1499                         pinmaps = GET_ARG();
1500                 } else {
1501                         p_err("expected no more arguments, 'type', 'map' or 'dev', got: '%s'?",
1502                               *argv);
1503                         goto err_free_reuse_maps;
1504                 }
1505         }
1506
1507         set_max_rlimit();
1508
1509         obj = bpf_object__open_file(file, &open_opts);
1510         if (libbpf_get_error(obj)) {
1511                 p_err("failed to open object file");
1512                 goto err_free_reuse_maps;
1513         }
1514
1515         bpf_object__for_each_program(pos, obj) {
1516                 enum bpf_prog_type prog_type = common_prog_type;
1517
1518                 if (prog_type == BPF_PROG_TYPE_UNSPEC) {
1519                         const char *sec_name = bpf_program__section_name(pos);
1520
1521                         err = get_prog_type_by_name(sec_name, &prog_type,
1522                                                     &expected_attach_type);
1523                         if (err < 0)
1524                                 goto err_close_obj;
1525                 }
1526
1527                 bpf_program__set_ifindex(pos, ifindex);
1528                 bpf_program__set_type(pos, prog_type);
1529                 bpf_program__set_expected_attach_type(pos, expected_attach_type);
1530         }
1531
1532         qsort(map_replace, old_map_fds, sizeof(*map_replace),
1533               map_replace_compar);
1534
1535         /* After the sort maps by name will be first on the list, because they
1536          * have idx == -1.  Resolve them.
1537          */
1538         j = 0;
1539         while (j < old_map_fds && map_replace[j].name) {
1540                 i = 0;
1541                 bpf_object__for_each_map(map, obj) {
1542                         if (!strcmp(bpf_map__name(map), map_replace[j].name)) {
1543                                 map_replace[j].idx = i;
1544                                 break;
1545                         }
1546                         i++;
1547                 }
1548                 if (map_replace[j].idx == -1) {
1549                         p_err("unable to find map '%s'", map_replace[j].name);
1550                         goto err_close_obj;
1551                 }
1552                 j++;
1553         }
1554         /* Resort if any names were resolved */
1555         if (j)
1556                 qsort(map_replace, old_map_fds, sizeof(*map_replace),
1557                       map_replace_compar);
1558
1559         /* Set ifindex and name reuse */
1560         j = 0;
1561         idx = 0;
1562         bpf_object__for_each_map(map, obj) {
1563                 if (!bpf_map__is_offload_neutral(map))
1564                         bpf_map__set_ifindex(map, ifindex);
1565
1566                 if (j < old_map_fds && idx == map_replace[j].idx) {
1567                         err = bpf_map__reuse_fd(map, map_replace[j++].fd);
1568                         if (err) {
1569                                 p_err("unable to set up map reuse: %d", err);
1570                                 goto err_close_obj;
1571                         }
1572
1573                         /* Next reuse wants to apply to the same map */
1574                         if (j < old_map_fds && map_replace[j].idx == idx) {
1575                                 p_err("replacement for map idx %d specified more than once",
1576                                       idx);
1577                                 goto err_close_obj;
1578                         }
1579                 }
1580
1581                 idx++;
1582         }
1583         if (j < old_map_fds) {
1584                 p_err("map idx '%d' not used", map_replace[j].idx);
1585                 goto err_close_obj;
1586         }
1587
1588         load_attr.obj = obj;
1589         if (verifier_logs)
1590                 /* log_level1 + log_level2 + stats, but not stable UAPI */
1591                 load_attr.log_level = 1 + 2 + 4;
1592
1593         err = bpf_object__load_xattr(&load_attr);
1594         if (err) {
1595                 p_err("failed to load object file");
1596                 goto err_close_obj;
1597         }
1598
1599         err = mount_bpffs_for_pin(pinfile);
1600         if (err)
1601                 goto err_close_obj;
1602
1603         if (first_prog_only) {
1604                 prog = bpf_program__next(NULL, obj);
1605                 if (!prog) {
1606                         p_err("object file doesn't contain any bpf program");
1607                         goto err_close_obj;
1608                 }
1609
1610                 err = bpf_obj_pin(bpf_program__fd(prog), pinfile);
1611                 if (err) {
1612                         p_err("failed to pin program %s",
1613                               bpf_program__section_name(prog));
1614                         goto err_close_obj;
1615                 }
1616         } else {
1617                 err = bpf_object__pin_programs(obj, pinfile);
1618                 if (err) {
1619                         p_err("failed to pin all programs");
1620                         goto err_close_obj;
1621                 }
1622         }
1623
1624         if (pinmaps) {
1625                 err = bpf_object__pin_maps(obj, pinmaps);
1626                 if (err) {
1627                         p_err("failed to pin all maps");
1628                         goto err_unpin;
1629                 }
1630         }
1631
1632         if (json_output)
1633                 jsonw_null(json_wtr);
1634
1635         bpf_object__close(obj);
1636         for (i = 0; i < old_map_fds; i++)
1637                 close(map_replace[i].fd);
1638         free(map_replace);
1639
1640         return 0;
1641
1642 err_unpin:
1643         if (first_prog_only)
1644                 unlink(pinfile);
1645         else
1646                 bpf_object__unpin_programs(obj, pinfile);
1647 err_close_obj:
1648         bpf_object__close(obj);
1649 err_free_reuse_maps:
1650         for (i = 0; i < old_map_fds; i++)
1651                 close(map_replace[i].fd);
1652         free(map_replace);
1653         return -1;
1654 }
1655
1656 static int count_open_fds(void)
1657 {
1658         DIR *dp = opendir("/proc/self/fd");
1659         struct dirent *de;
1660         int cnt = -3;
1661
1662         if (!dp)
1663                 return -1;
1664
1665         while ((de = readdir(dp)))
1666                 cnt++;
1667
1668         closedir(dp);
1669         return cnt;
1670 }
1671
1672 static int try_loader(struct gen_loader_opts *gen)
1673 {
1674         struct bpf_load_and_run_opts opts = {};
1675         struct bpf_loader_ctx *ctx;
1676         int ctx_sz = sizeof(*ctx) + 64 * max(sizeof(struct bpf_map_desc),
1677                                              sizeof(struct bpf_prog_desc));
1678         int log_buf_sz = (1u << 24) - 1;
1679         int err, fds_before, fd_delta;
1680         char *log_buf;
1681
1682         ctx = alloca(ctx_sz);
1683         memset(ctx, 0, ctx_sz);
1684         ctx->sz = ctx_sz;
1685         ctx->log_level = 1;
1686         ctx->log_size = log_buf_sz;
1687         log_buf = malloc(log_buf_sz);
1688         if (!log_buf)
1689                 return -ENOMEM;
1690         ctx->log_buf = (long) log_buf;
1691         opts.ctx = ctx;
1692         opts.data = gen->data;
1693         opts.data_sz = gen->data_sz;
1694         opts.insns = gen->insns;
1695         opts.insns_sz = gen->insns_sz;
1696         fds_before = count_open_fds();
1697         err = bpf_load_and_run(&opts);
1698         fd_delta = count_open_fds() - fds_before;
1699         if (err < 0) {
1700                 fprintf(stderr, "err %d\n%s\n%s", err, opts.errstr, log_buf);
1701                 if (fd_delta)
1702                         fprintf(stderr, "loader prog leaked %d FDs\n",
1703                                 fd_delta);
1704         }
1705         free(log_buf);
1706         return err;
1707 }
1708
1709 static int do_loader(int argc, char **argv)
1710 {
1711         DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts);
1712         DECLARE_LIBBPF_OPTS(gen_loader_opts, gen);
1713         struct bpf_object_load_attr load_attr = {};
1714         struct bpf_object *obj;
1715         const char *file;
1716         int err = 0;
1717
1718         if (!REQ_ARGS(1))
1719                 return -1;
1720         file = GET_ARG();
1721
1722         obj = bpf_object__open_file(file, &open_opts);
1723         if (libbpf_get_error(obj)) {
1724                 p_err("failed to open object file");
1725                 goto err_close_obj;
1726         }
1727
1728         err = bpf_object__gen_loader(obj, &gen);
1729         if (err)
1730                 goto err_close_obj;
1731
1732         load_attr.obj = obj;
1733         if (verifier_logs)
1734                 /* log_level1 + log_level2 + stats, but not stable UAPI */
1735                 load_attr.log_level = 1 + 2 + 4;
1736
1737         err = bpf_object__load_xattr(&load_attr);
1738         if (err) {
1739                 p_err("failed to load object file");
1740                 goto err_close_obj;
1741         }
1742
1743         if (verifier_logs) {
1744                 struct dump_data dd = {};
1745
1746                 kernel_syms_load(&dd);
1747                 dump_xlated_plain(&dd, (void *)gen.insns, gen.insns_sz, false, false);
1748                 kernel_syms_destroy(&dd);
1749         }
1750         err = try_loader(&gen);
1751 err_close_obj:
1752         bpf_object__close(obj);
1753         return err;
1754 }
1755
1756 static int do_load(int argc, char **argv)
1757 {
1758         if (use_loader)
1759                 return do_loader(argc, argv);
1760         return load_with_options(argc, argv, true);
1761 }
1762
1763 static int do_loadall(int argc, char **argv)
1764 {
1765         return load_with_options(argc, argv, false);
1766 }
1767
1768 #ifdef BPFTOOL_WITHOUT_SKELETONS
1769
1770 static int do_profile(int argc, char **argv)
1771 {
1772         p_err("bpftool prog profile command is not supported. Please build bpftool with clang >= 10.0.0");
1773         return 0;
1774 }
1775
1776 #else /* BPFTOOL_WITHOUT_SKELETONS */
1777
1778 #include "profiler.skel.h"
1779
1780 struct profile_metric {
1781         const char *name;
1782         struct bpf_perf_event_value val;
1783         struct perf_event_attr attr;
1784         bool selected;
1785
1786         /* calculate ratios like instructions per cycle */
1787         const int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */
1788         const char *ratio_desc;
1789         const float ratio_mul;
1790 } metrics[] = {
1791         {
1792                 .name = "cycles",
1793                 .attr = {
1794                         .type = PERF_TYPE_HARDWARE,
1795                         .config = PERF_COUNT_HW_CPU_CYCLES,
1796                         .exclude_user = 1,
1797                 },
1798         },
1799         {
1800                 .name = "instructions",
1801                 .attr = {
1802                         .type = PERF_TYPE_HARDWARE,
1803                         .config = PERF_COUNT_HW_INSTRUCTIONS,
1804                         .exclude_user = 1,
1805                 },
1806                 .ratio_metric = 1,
1807                 .ratio_desc = "insns per cycle",
1808                 .ratio_mul = 1.0,
1809         },
1810         {
1811                 .name = "l1d_loads",
1812                 .attr = {
1813                         .type = PERF_TYPE_HW_CACHE,
1814                         .config =
1815                                 PERF_COUNT_HW_CACHE_L1D |
1816                                 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1817                                 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
1818                         .exclude_user = 1,
1819                 },
1820         },
1821         {
1822                 .name = "llc_misses",
1823                 .attr = {
1824                         .type = PERF_TYPE_HW_CACHE,
1825                         .config =
1826                                 PERF_COUNT_HW_CACHE_LL |
1827                                 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1828                                 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
1829                         .exclude_user = 1
1830                 },
1831                 .ratio_metric = 2,
1832                 .ratio_desc = "LLC misses per million insns",
1833                 .ratio_mul = 1e6,
1834         },
1835         {
1836                 .name = "itlb_misses",
1837                 .attr = {
1838                         .type = PERF_TYPE_HW_CACHE,
1839                         .config =
1840                                 PERF_COUNT_HW_CACHE_ITLB |
1841                                 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1842                                 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
1843                         .exclude_user = 1
1844                 },
1845                 .ratio_metric = 2,
1846                 .ratio_desc = "itlb misses per million insns",
1847                 .ratio_mul = 1e6,
1848         },
1849         {
1850                 .name = "dtlb_misses",
1851                 .attr = {
1852                         .type = PERF_TYPE_HW_CACHE,
1853                         .config =
1854                                 PERF_COUNT_HW_CACHE_DTLB |
1855                                 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1856                                 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
1857                         .exclude_user = 1
1858                 },
1859                 .ratio_metric = 2,
1860                 .ratio_desc = "dtlb misses per million insns",
1861                 .ratio_mul = 1e6,
1862         },
1863 };
1864
1865 static __u64 profile_total_count;
1866
1867 #define MAX_NUM_PROFILE_METRICS 4
1868
1869 static int profile_parse_metrics(int argc, char **argv)
1870 {
1871         unsigned int metric_cnt;
1872         int selected_cnt = 0;
1873         unsigned int i;
1874
1875         metric_cnt = sizeof(metrics) / sizeof(struct profile_metric);
1876
1877         while (argc > 0) {
1878                 for (i = 0; i < metric_cnt; i++) {
1879                         if (is_prefix(argv[0], metrics[i].name)) {
1880                                 if (!metrics[i].selected)
1881                                         selected_cnt++;
1882                                 metrics[i].selected = true;
1883                                 break;
1884                         }
1885                 }
1886                 if (i == metric_cnt) {
1887                         p_err("unknown metric %s", argv[0]);
1888                         return -1;
1889                 }
1890                 NEXT_ARG();
1891         }
1892         if (selected_cnt > MAX_NUM_PROFILE_METRICS) {
1893                 p_err("too many (%d) metrics, please specify no more than %d metrics at at time",
1894                       selected_cnt, MAX_NUM_PROFILE_METRICS);
1895                 return -1;
1896         }
1897         return selected_cnt;
1898 }
1899
1900 static void profile_read_values(struct profiler_bpf *obj)
1901 {
1902         __u32 m, cpu, num_cpu = obj->rodata->num_cpu;
1903         int reading_map_fd, count_map_fd;
1904         __u64 counts[num_cpu];
1905         __u32 key = 0;
1906         int err;
1907
1908         reading_map_fd = bpf_map__fd(obj->maps.accum_readings);
1909         count_map_fd = bpf_map__fd(obj->maps.counts);
1910         if (reading_map_fd < 0 || count_map_fd < 0) {
1911                 p_err("failed to get fd for map");
1912                 return;
1913         }
1914
1915         err = bpf_map_lookup_elem(count_map_fd, &key, counts);
1916         if (err) {
1917                 p_err("failed to read count_map: %s", strerror(errno));
1918                 return;
1919         }
1920
1921         profile_total_count = 0;
1922         for (cpu = 0; cpu < num_cpu; cpu++)
1923                 profile_total_count += counts[cpu];
1924
1925         for (m = 0; m < ARRAY_SIZE(metrics); m++) {
1926                 struct bpf_perf_event_value values[num_cpu];
1927
1928                 if (!metrics[m].selected)
1929                         continue;
1930
1931                 err = bpf_map_lookup_elem(reading_map_fd, &key, values);
1932                 if (err) {
1933                         p_err("failed to read reading_map: %s",
1934                               strerror(errno));
1935                         return;
1936                 }
1937                 for (cpu = 0; cpu < num_cpu; cpu++) {
1938                         metrics[m].val.counter += values[cpu].counter;
1939                         metrics[m].val.enabled += values[cpu].enabled;
1940                         metrics[m].val.running += values[cpu].running;
1941                 }
1942                 key++;
1943         }
1944 }
1945
1946 static void profile_print_readings_json(void)
1947 {
1948         __u32 m;
1949
1950         jsonw_start_array(json_wtr);
1951         for (m = 0; m < ARRAY_SIZE(metrics); m++) {
1952                 if (!metrics[m].selected)
1953                         continue;
1954                 jsonw_start_object(json_wtr);
1955                 jsonw_string_field(json_wtr, "metric", metrics[m].name);
1956                 jsonw_lluint_field(json_wtr, "run_cnt", profile_total_count);
1957                 jsonw_lluint_field(json_wtr, "value", metrics[m].val.counter);
1958                 jsonw_lluint_field(json_wtr, "enabled", metrics[m].val.enabled);
1959                 jsonw_lluint_field(json_wtr, "running", metrics[m].val.running);
1960
1961                 jsonw_end_object(json_wtr);
1962         }
1963         jsonw_end_array(json_wtr);
1964 }
1965
1966 static void profile_print_readings_plain(void)
1967 {
1968         __u32 m;
1969
1970         printf("\n%18llu %-20s\n", profile_total_count, "run_cnt");
1971         for (m = 0; m < ARRAY_SIZE(metrics); m++) {
1972                 struct bpf_perf_event_value *val = &metrics[m].val;
1973                 int r;
1974
1975                 if (!metrics[m].selected)
1976                         continue;
1977                 printf("%18llu %-20s", val->counter, metrics[m].name);
1978
1979                 r = metrics[m].ratio_metric - 1;
1980                 if (r >= 0 && metrics[r].selected &&
1981                     metrics[r].val.counter > 0) {
1982                         printf("# %8.2f %-30s",
1983                                val->counter * metrics[m].ratio_mul /
1984                                metrics[r].val.counter,
1985                                metrics[m].ratio_desc);
1986                 } else {
1987                         printf("%-41s", "");
1988                 }
1989
1990                 if (val->enabled > val->running)
1991                         printf("(%4.2f%%)",
1992                                val->running * 100.0 / val->enabled);
1993                 printf("\n");
1994         }
1995 }
1996
1997 static void profile_print_readings(void)
1998 {
1999         if (json_output)
2000                 profile_print_readings_json();
2001         else
2002                 profile_print_readings_plain();
2003 }
2004
2005 static char *profile_target_name(int tgt_fd)
2006 {
2007         struct bpf_prog_info_linear *info_linear;
2008         struct bpf_func_info *func_info;
2009         const struct btf_type *t;
2010         struct btf *btf = NULL;
2011         char *name = NULL;
2012
2013         info_linear = bpf_program__get_prog_info_linear(
2014                 tgt_fd, 1UL << BPF_PROG_INFO_FUNC_INFO);
2015         if (IS_ERR_OR_NULL(info_linear)) {
2016                 p_err("failed to get info_linear for prog FD %d", tgt_fd);
2017                 return NULL;
2018         }
2019
2020         if (info_linear->info.btf_id == 0) {
2021                 p_err("prog FD %d doesn't have valid btf", tgt_fd);
2022                 goto out;
2023         }
2024
2025         btf = btf__load_from_kernel_by_id(info_linear->info.btf_id);
2026         if (libbpf_get_error(btf)) {
2027                 p_err("failed to load btf for prog FD %d", tgt_fd);
2028                 goto out;
2029         }
2030
2031         func_info = u64_to_ptr(info_linear->info.func_info);
2032         t = btf__type_by_id(btf, func_info[0].type_id);
2033         if (!t) {
2034                 p_err("btf %d doesn't have type %d",
2035                       info_linear->info.btf_id, func_info[0].type_id);
2036                 goto out;
2037         }
2038         name = strdup(btf__name_by_offset(btf, t->name_off));
2039 out:
2040         btf__free(btf);
2041         free(info_linear);
2042         return name;
2043 }
2044
2045 static struct profiler_bpf *profile_obj;
2046 static int profile_tgt_fd = -1;
2047 static char *profile_tgt_name;
2048 static int *profile_perf_events;
2049 static int profile_perf_event_cnt;
2050
2051 static void profile_close_perf_events(struct profiler_bpf *obj)
2052 {
2053         int i;
2054
2055         for (i = profile_perf_event_cnt - 1; i >= 0; i--)
2056                 close(profile_perf_events[i]);
2057
2058         free(profile_perf_events);
2059         profile_perf_event_cnt = 0;
2060 }
2061
2062 static int profile_open_perf_events(struct profiler_bpf *obj)
2063 {
2064         unsigned int cpu, m;
2065         int map_fd, pmu_fd;
2066
2067         profile_perf_events = calloc(
2068                 sizeof(int), obj->rodata->num_cpu * obj->rodata->num_metric);
2069         if (!profile_perf_events) {
2070                 p_err("failed to allocate memory for perf_event array: %s",
2071                       strerror(errno));
2072                 return -1;
2073         }
2074         map_fd = bpf_map__fd(obj->maps.events);
2075         if (map_fd < 0) {
2076                 p_err("failed to get fd for events map");
2077                 return -1;
2078         }
2079
2080         for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2081                 if (!metrics[m].selected)
2082                         continue;
2083                 for (cpu = 0; cpu < obj->rodata->num_cpu; cpu++) {
2084                         pmu_fd = syscall(__NR_perf_event_open, &metrics[m].attr,
2085                                          -1/*pid*/, cpu, -1/*group_fd*/, 0);
2086                         if (pmu_fd < 0 ||
2087                             bpf_map_update_elem(map_fd, &profile_perf_event_cnt,
2088                                                 &pmu_fd, BPF_ANY) ||
2089                             ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0)) {
2090                                 p_err("failed to create event %s on cpu %d",
2091                                       metrics[m].name, cpu);
2092                                 return -1;
2093                         }
2094                         profile_perf_events[profile_perf_event_cnt++] = pmu_fd;
2095                 }
2096         }
2097         return 0;
2098 }
2099
2100 static void profile_print_and_cleanup(void)
2101 {
2102         profile_close_perf_events(profile_obj);
2103         profile_read_values(profile_obj);
2104         profile_print_readings();
2105         profiler_bpf__destroy(profile_obj);
2106
2107         close(profile_tgt_fd);
2108         free(profile_tgt_name);
2109 }
2110
2111 static void int_exit(int signo)
2112 {
2113         profile_print_and_cleanup();
2114         exit(0);
2115 }
2116
2117 static int do_profile(int argc, char **argv)
2118 {
2119         int num_metric, num_cpu, err = -1;
2120         struct bpf_program *prog;
2121         unsigned long duration;
2122         char *endptr;
2123
2124         /* we at least need two args for the prog and one metric */
2125         if (!REQ_ARGS(3))
2126                 return -EINVAL;
2127
2128         /* parse target fd */
2129         profile_tgt_fd = prog_parse_fd(&argc, &argv);
2130         if (profile_tgt_fd < 0) {
2131                 p_err("failed to parse fd");
2132                 return -1;
2133         }
2134
2135         /* parse profiling optional duration */
2136         if (argc > 2 && is_prefix(argv[0], "duration")) {
2137                 NEXT_ARG();
2138                 duration = strtoul(*argv, &endptr, 0);
2139                 if (*endptr)
2140                         usage();
2141                 NEXT_ARG();
2142         } else {
2143                 duration = UINT_MAX;
2144         }
2145
2146         num_metric = profile_parse_metrics(argc, argv);
2147         if (num_metric <= 0)
2148                 goto out;
2149
2150         num_cpu = libbpf_num_possible_cpus();
2151         if (num_cpu <= 0) {
2152                 p_err("failed to identify number of CPUs");
2153                 goto out;
2154         }
2155
2156         profile_obj = profiler_bpf__open();
2157         if (!profile_obj) {
2158                 p_err("failed to open and/or load BPF object");
2159                 goto out;
2160         }
2161
2162         profile_obj->rodata->num_cpu = num_cpu;
2163         profile_obj->rodata->num_metric = num_metric;
2164
2165         /* adjust map sizes */
2166         bpf_map__resize(profile_obj->maps.events, num_metric * num_cpu);
2167         bpf_map__resize(profile_obj->maps.fentry_readings, num_metric);
2168         bpf_map__resize(profile_obj->maps.accum_readings, num_metric);
2169         bpf_map__resize(profile_obj->maps.counts, 1);
2170
2171         /* change target name */
2172         profile_tgt_name = profile_target_name(profile_tgt_fd);
2173         if (!profile_tgt_name)
2174                 goto out;
2175
2176         bpf_object__for_each_program(prog, profile_obj->obj) {
2177                 err = bpf_program__set_attach_target(prog, profile_tgt_fd,
2178                                                      profile_tgt_name);
2179                 if (err) {
2180                         p_err("failed to set attach target\n");
2181                         goto out;
2182                 }
2183         }
2184
2185         set_max_rlimit();
2186         err = profiler_bpf__load(profile_obj);
2187         if (err) {
2188                 p_err("failed to load profile_obj");
2189                 goto out;
2190         }
2191
2192         err = profile_open_perf_events(profile_obj);
2193         if (err)
2194                 goto out;
2195
2196         err = profiler_bpf__attach(profile_obj);
2197         if (err) {
2198                 p_err("failed to attach profile_obj");
2199                 goto out;
2200         }
2201         signal(SIGINT, int_exit);
2202
2203         sleep(duration);
2204         profile_print_and_cleanup();
2205         return 0;
2206
2207 out:
2208         profile_close_perf_events(profile_obj);
2209         if (profile_obj)
2210                 profiler_bpf__destroy(profile_obj);
2211         close(profile_tgt_fd);
2212         free(profile_tgt_name);
2213         return err;
2214 }
2215
2216 #endif /* BPFTOOL_WITHOUT_SKELETONS */
2217
2218 static int do_help(int argc, char **argv)
2219 {
2220         if (json_output) {
2221                 jsonw_null(json_wtr);
2222                 return 0;
2223         }
2224
2225         fprintf(stderr,
2226                 "Usage: %1$s %2$s { show | list } [PROG]\n"
2227                 "       %1$s %2$s dump xlated PROG [{ file FILE | opcodes | visual | linum }]\n"
2228                 "       %1$s %2$s dump jited  PROG [{ file FILE | opcodes | linum }]\n"
2229                 "       %1$s %2$s pin   PROG FILE\n"
2230                 "       %1$s %2$s { load | loadall } OBJ  PATH \\\n"
2231                 "                         [type TYPE] [dev NAME] \\\n"
2232                 "                         [map { idx IDX | name NAME } MAP]\\\n"
2233                 "                         [pinmaps MAP_DIR]\n"
2234                 "       %1$s %2$s attach PROG ATTACH_TYPE [MAP]\n"
2235                 "       %1$s %2$s detach PROG ATTACH_TYPE [MAP]\n"
2236                 "       %1$s %2$s run PROG \\\n"
2237                 "                         data_in FILE \\\n"
2238                 "                         [data_out FILE [data_size_out L]] \\\n"
2239                 "                         [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n"
2240                 "                         [repeat N]\n"
2241                 "       %1$s %2$s profile PROG [duration DURATION] METRICs\n"
2242                 "       %1$s %2$s tracelog\n"
2243                 "       %1$s %2$s help\n"
2244                 "\n"
2245                 "       " HELP_SPEC_MAP "\n"
2246                 "       " HELP_SPEC_PROGRAM "\n"
2247                 "       TYPE := { socket | kprobe | kretprobe | classifier | action |\n"
2248                 "                 tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n"
2249                 "                 cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n"
2250                 "                 lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n"
2251                 "                 sk_reuseport | flow_dissector | cgroup/sysctl |\n"
2252                 "                 cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"
2253                 "                 cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"
2254                 "                 cgroup/getpeername4 | cgroup/getpeername6 |\n"
2255                 "                 cgroup/getsockname4 | cgroup/getsockname6 | cgroup/sendmsg4 |\n"
2256                 "                 cgroup/sendmsg6 | cgroup/recvmsg4 | cgroup/recvmsg6 |\n"
2257                 "                 cgroup/getsockopt | cgroup/setsockopt | cgroup/sock_release |\n"
2258                 "                 struct_ops | fentry | fexit | freplace | sk_lookup }\n"
2259                 "       ATTACH_TYPE := { msg_verdict | skb_verdict | stream_verdict |\n"
2260                 "                        stream_parser | flow_dissector }\n"
2261                 "       METRIC := { cycles | instructions | l1d_loads | llc_misses | itlb_misses | dtlb_misses }\n"
2262                 "       " HELP_SPEC_OPTIONS " |\n"
2263                 "                    {-f|--bpffs} | {-m|--mapcompat} | {-n|--nomount} |\n"
2264                 "                    {-L|--use-loader} }\n"
2265                 "",
2266                 bin_name, argv[-2]);
2267
2268         return 0;
2269 }
2270
2271 static const struct cmd cmds[] = {
2272         { "show",       do_show },
2273         { "list",       do_show },
2274         { "help",       do_help },
2275         { "dump",       do_dump },
2276         { "pin",        do_pin },
2277         { "load",       do_load },
2278         { "loadall",    do_loadall },
2279         { "attach",     do_attach },
2280         { "detach",     do_detach },
2281         { "tracelog",   do_tracelog },
2282         { "run",        do_run },
2283         { "profile",    do_profile },
2284         { 0 }
2285 };
2286
2287 int do_prog(int argc, char **argv)
2288 {
2289         return cmd_select(cmds, argc, argv, do_help);
2290 }