tools/bpf/bpftool/map.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
   3
   4 #include <assert.h>
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <linux/err.h>
   8 #include <linux/kernel.h>
   9 #include <net/if.h>
  10 #include <stdbool.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <unistd.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17
  18 #include <bpf/bpf.h>
  19 #include <bpf/btf.h>
  20
  21 #include "json_writer.h"
  22 #include "main.h"
  23
  24 const char * const map_type_name[] = {
  25         [BPF_MAP_TYPE_UNSPEC]                   = "unspec",
  26         [BPF_MAP_TYPE_HASH]                     = "hash",
  27         [BPF_MAP_TYPE_ARRAY]                    = "array",
  28         [BPF_MAP_TYPE_PROG_ARRAY]               = "prog_array",
  29         [BPF_MAP_TYPE_PERF_EVENT_ARRAY]         = "perf_event_array",
  30         [BPF_MAP_TYPE_PERCPU_HASH]              = "percpu_hash",
  31         [BPF_MAP_TYPE_PERCPU_ARRAY]             = "percpu_array",
  32         [BPF_MAP_TYPE_STACK_TRACE]              = "stack_trace",
  33         [BPF_MAP_TYPE_CGROUP_ARRAY]             = "cgroup_array",
  34         [BPF_MAP_TYPE_LRU_HASH]                 = "lru_hash",
  35         [BPF_MAP_TYPE_LRU_PERCPU_HASH]          = "lru_percpu_hash",
  36         [BPF_MAP_TYPE_LPM_TRIE]                 = "lpm_trie",
  37         [BPF_MAP_TYPE_ARRAY_OF_MAPS]            = "array_of_maps",
  38         [BPF_MAP_TYPE_HASH_OF_MAPS]             = "hash_of_maps",
  39         [BPF_MAP_TYPE_DEVMAP]                   = "devmap",
  40         [BPF_MAP_TYPE_DEVMAP_HASH]              = "devmap_hash",
  41         [BPF_MAP_TYPE_SOCKMAP]                  = "sockmap",
  42         [BPF_MAP_TYPE_CPUMAP]                   = "cpumap",
  43         [BPF_MAP_TYPE_XSKMAP]                   = "xskmap",
  44         [BPF_MAP_TYPE_SOCKHASH]                 = "sockhash",
  45         [BPF_MAP_TYPE_CGROUP_STORAGE]           = "cgroup_storage",
  46         [BPF_MAP_TYPE_REUSEPORT_SOCKARRAY]      = "reuseport_sockarray",
  47         [BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE]    = "percpu_cgroup_storage",
  48         [BPF_MAP_TYPE_QUEUE]                    = "queue",
  49         [BPF_MAP_TYPE_STACK]                    = "stack",
  50         [BPF_MAP_TYPE_SK_STORAGE]               = "sk_storage",
  51         [BPF_MAP_TYPE_STRUCT_OPS]               = "struct_ops",
  52         [BPF_MAP_TYPE_RINGBUF]                  = "ringbuf",
  53         [BPF_MAP_TYPE_INODE_STORAGE]            = "inode_storage",
  54 };
  55
  56 const size_t map_type_name_size = ARRAY_SIZE(map_type_name);
  57
  58 static bool map_is_per_cpu(__u32 type)
  59 {
  60         return type == BPF_MAP_TYPE_PERCPU_HASH ||
  61                type == BPF_MAP_TYPE_PERCPU_ARRAY ||
  62                type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
  63                type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE;
  64 }
  65
  66 static bool map_is_map_of_maps(__u32 type)
  67 {
  68         return type == BPF_MAP_TYPE_ARRAY_OF_MAPS ||
  69                type == BPF_MAP_TYPE_HASH_OF_MAPS;
  70 }
  71
  72 static bool map_is_map_of_progs(__u32 type)
  73 {
  74         return type == BPF_MAP_TYPE_PROG_ARRAY;
  75 }
  76
  77 static int map_type_from_str(const char *type)
  78 {
  79         unsigned int i;
  80
  81         for (i = 0; i < ARRAY_SIZE(map_type_name); i++)
  82                 /* Don't allow prefixing in case of possible future shadowing */
  83                 if (map_type_name[i] && !strcmp(map_type_name[i], type))
  84                         return i;
  85         return -1;
  86 }
  87
  88 static void *alloc_value(struct bpf_map_info *info)
  89 {
  90         if (map_is_per_cpu(info->type))
  91                 return malloc(round_up(info->value_size, 8) *
  92                               get_possible_cpus());
  93         else
  94                 return malloc(info->value_size);
  95 }
  96
  97 static int do_dump_btf(const struct btf_dumper *d,
  98                        struct bpf_map_info *map_info, void *key,
  99                        void *value)
 100 {
 101         __u32 value_id;
 102         int ret = 0;
 103
 104         /* start of key-value pair */
 105         jsonw_start_object(d->jw);
 106
 107         if (map_info->btf_key_type_id) {
 108                 jsonw_name(d->jw, "key");
 109
 110                 ret = btf_dumper_type(d, map_info->btf_key_type_id, key);
 111                 if (ret)
 112                         goto err_end_obj;
 113         }
 114
 115         value_id = map_info->btf_vmlinux_value_type_id ?
 116                 : map_info->btf_value_type_id;
 117
 118         if (!map_is_per_cpu(map_info->type)) {
 119                 jsonw_name(d->jw, "value");
 120                 ret = btf_dumper_type(d, value_id, value);
 121         } else {
 122                 unsigned int i, n, step;
 123
 124                 jsonw_name(d->jw, "values");
 125                 jsonw_start_array(d->jw);
 126                 n = get_possible_cpus();
 127                 step = round_up(map_info->value_size, 8);
 128                 for (i = 0; i < n; i++) {
 129                         jsonw_start_object(d->jw);
 130                         jsonw_int_field(d->jw, "cpu", i);
 131                         jsonw_name(d->jw, "value");
 132                         ret = btf_dumper_type(d, value_id, value + i * step);
 133                         jsonw_end_object(d->jw);
 134                         if (ret)
 135                                 break;
 136                 }
 137                 jsonw_end_array(d->jw);
 138         }
 139
 140 err_end_obj:
 141         /* end of key-value pair */
 142         jsonw_end_object(d->jw);
 143
 144         return ret;
 145 }
 146
 147 static json_writer_t *get_btf_writer(void)
 148 {
 149         json_writer_t *jw = jsonw_new(stdout);
 150
 151         if (!jw)
 152                 return NULL;
 153         jsonw_pretty(jw, true);
 154
 155         return jw;
 156 }
 157
 158 static void print_entry_json(struct bpf_map_info *info, unsigned char *key,
 159                              unsigned char *value, struct btf *btf)
 160 {
 161         jsonw_start_object(json_wtr);
 162
 163         if (!map_is_per_cpu(info->type)) {
 164                 jsonw_name(json_wtr, "key");
 165                 print_hex_data_json(key, info->key_size);
 166                 jsonw_name(json_wtr, "value");
 167                 print_hex_data_json(value, info->value_size);
 168                 if (btf) {
 169                         struct btf_dumper d = {
 170                                 .btf = btf,
 171                                 .jw = json_wtr,
 172                                 .is_plain_text = false,
 173                         };
 174
 175                         jsonw_name(json_wtr, "formatted");
 176                         do_dump_btf(&d, info, key, value);
 177                 }
 178         } else {
 179                 unsigned int i, n, step;
 180
 181                 n = get_possible_cpus();
 182                 step = round_up(info->value_size, 8);
 183
 184                 jsonw_name(json_wtr, "key");
 185                 print_hex_data_json(key, info->key_size);
 186
 187                 jsonw_name(json_wtr, "values");
 188                 jsonw_start_array(json_wtr);
 189                 for (i = 0; i < n; i++) {
 190                         jsonw_start_object(json_wtr);
 191
 192                         jsonw_int_field(json_wtr, "cpu", i);
 193
 194                         jsonw_name(json_wtr, "value");
 195                         print_hex_data_json(value + i * step,
 196                                             info->value_size);
 197
 198                         jsonw_end_object(json_wtr);
 199                 }
 200                 jsonw_end_array(json_wtr);
 201                 if (btf) {
 202                         struct btf_dumper d = {
 203                                 .btf = btf,
 204                                 .jw = json_wtr,
 205                                 .is_plain_text = false,
 206                         };
 207
 208                         jsonw_name(json_wtr, "formatted");
 209                         do_dump_btf(&d, info, key, value);
 210                 }
 211         }
 212
 213         jsonw_end_object(json_wtr);
 214 }
 215
 216 static void
 217 print_entry_error_msg(struct bpf_map_info *info, unsigned char *key,
 218                       const char *error_msg)
 219 {
 220         int msg_size = strlen(error_msg);
 221         bool single_line, break_names;
 222
 223         break_names = info->key_size > 16 || msg_size > 16;
 224         single_line = info->key_size + msg_size <= 24 && !break_names;
 225
 226         printf("key:%c", break_names ? '\n' : ' ');
 227         fprint_hex(stdout, key, info->key_size, " ");
 228
 229         printf(single_line ? "  " : "\n");
 230
 231         printf("value:%c%s", break_names ? '\n' : ' ', error_msg);
 232
 233         printf("\n");
 234 }
 235
 236 static void
 237 print_entry_error(struct bpf_map_info *map_info, void *key, int lookup_errno)
 238 {
 239         /* For prog_array maps or arrays of maps, failure to lookup the value
 240          * means there is no entry for that key. Do not print an error message
 241          * in that case.
 242          */
 243         if ((map_is_map_of_maps(map_info->type) ||
 244              map_is_map_of_progs(map_info->type)) && lookup_errno == ENOENT)
 245                 return;
 246
 247         if (json_output) {
 248                 jsonw_start_object(json_wtr);   /* entry */
 249                 jsonw_name(json_wtr, "key");
 250                 print_hex_data_json(key, map_info->key_size);
 251                 jsonw_name(json_wtr, "value");
 252                 jsonw_start_object(json_wtr);   /* error */
 253                 jsonw_string_field(json_wtr, "error", strerror(lookup_errno));
 254                 jsonw_end_object(json_wtr);     /* error */
 255                 jsonw_end_object(json_wtr);     /* entry */
 256         } else {
 257                 const char *msg = NULL;
 258
 259                 if (lookup_errno == ENOENT)
 260                         msg = "<no entry>";
 261                 else if (lookup_errno == ENOSPC &&
 262                          map_info->type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY)
 263                         msg = "<cannot read>";
 264
 265                 print_entry_error_msg(map_info, key,
 266                                       msg ? : strerror(lookup_errno));
 267         }
 268 }
 269
 270 static void print_entry_plain(struct bpf_map_info *info, unsigned char *key,
 271                               unsigned char *value)
 272 {
 273         if (!map_is_per_cpu(info->type)) {
 274                 bool single_line, break_names;
 275
 276                 break_names = info->key_size > 16 || info->value_size > 16;
 277                 single_line = info->key_size + info->value_size <= 24 &&
 278                         !break_names;
 279
 280                 if (info->key_size) {
 281                         printf("key:%c", break_names ? '\n' : ' ');
 282                         fprint_hex(stdout, key, info->key_size, " ");
 283
 284                         printf(single_line ? "  " : "\n");
 285                 }
 286
 287                 if (info->value_size) {
 288                         printf("value:%c", break_names ? '\n' : ' ');
 289                         fprint_hex(stdout, value, info->value_size, " ");
 290                 }
 291
 292                 printf("\n");
 293         } else {
 294                 unsigned int i, n, step;
 295
 296                 n = get_possible_cpus();
 297                 step = round_up(info->value_size, 8);
 298
 299                 if (info->key_size) {
 300                         printf("key:\n");
 301                         fprint_hex(stdout, key, info->key_size, " ");
 302                         printf("\n");
 303                 }
 304                 if (info->value_size) {
 305                         for (i = 0; i < n; i++) {
 306                                 printf("value (CPU %02d):%c",
 307                                        i, info->value_size > 16 ? '\n' : ' ');
 308                                 fprint_hex(stdout, value + i * step,
 309                                            info->value_size, " ");
 310                                 printf("\n");
 311                         }
 312                 }
 313         }
 314 }
 315
 316 static char **parse_bytes(char **argv, const char *name, unsigned char *val,
 317                           unsigned int n)
 318 {
 319         unsigned int i = 0, base = 0;
 320         char *endptr;
 321
 322         if (is_prefix(*argv, "hex")) {
 323                 base = 16;
 324                 argv++;
 325         }
 326
 327         while (i < n && argv[i]) {
 328                 val[i] = strtoul(argv[i], &endptr, base);
 329                 if (*endptr) {
 330                         p_err("error parsing byte: %s", argv[i]);
 331                         return NULL;
 332                 }
 333                 i++;
 334         }
 335
 336         if (i != n) {
 337                 p_err("%s expected %d bytes got %d", name, n, i);
 338                 return NULL;
 339         }
 340
 341         return argv + i;
 342 }
 343
 344 /* on per cpu maps we must copy the provided value on all value instances */
 345 static void fill_per_cpu_value(struct bpf_map_info *info, void *value)
 346 {
 347         unsigned int i, n, step;
 348
 349         if (!map_is_per_cpu(info->type))
 350                 return;
 351
 352         n = get_possible_cpus();
 353         step = round_up(info->value_size, 8);
 354         for (i = 1; i < n; i++)
 355                 memcpy(value + i * step, value, info->value_size);
 356 }
 357
 358 static int parse_elem(char **argv, struct bpf_map_info *info,
 359                       void *key, void *value, __u32 key_size, __u32 value_size,
 360                       __u32 *flags, __u32 **value_fd)
 361 {
 362         if (!*argv) {
 363                 if (!key && !value)
 364                         return 0;
 365                 p_err("did not find %s", key ? "key" : "value");
 366                 return -1;
 367         }
 368
 369         if (is_prefix(*argv, "key")) {
 370                 if (!key) {
 371                         if (key_size)
 372                                 p_err("duplicate key");
 373                         else
 374                                 p_err("unnecessary key");
 375                         return -1;
 376                 }
 377
 378                 argv = parse_bytes(argv + 1, "key", key, key_size);
 379                 if (!argv)
 380                         return -1;
 381
 382                 return parse_elem(argv, info, NULL, value, key_size, value_size,
 383                                   flags, value_fd);
 384         } else if (is_prefix(*argv, "value")) {
 385                 int fd;
 386
 387                 if (!value) {
 388                         if (value_size)
 389                                 p_err("duplicate value");
 390                         else
 391                                 p_err("unnecessary value");
 392                         return -1;
 393                 }
 394
 395                 argv++;
 396
 397                 if (map_is_map_of_maps(info->type)) {
 398                         int argc = 2;
 399
 400                         if (value_size != 4) {
 401                                 p_err("value smaller than 4B for map in map?");
 402                                 return -1;
 403                         }
 404                         if (!argv[0] || !argv[1]) {
 405                                 p_err("not enough value arguments for map in map");
 406                                 return -1;
 407                         }
 408
 409                         fd = map_parse_fd(&argc, &argv);
 410                         if (fd < 0)
 411                                 return -1;
 412
 413                         *value_fd = value;
 414                         **value_fd = fd;
 415                 } else if (map_is_map_of_progs(info->type)) {
 416                         int argc = 2;
 417
 418                         if (value_size != 4) {
 419                                 p_err("value smaller than 4B for map of progs?");
 420                                 return -1;
 421                         }
 422                         if (!argv[0] || !argv[1]) {
 423                                 p_err("not enough value arguments for map of progs");
 424                                 return -1;
 425                         }
 426                         if (is_prefix(*argv, "id"))
 427                                 p_info("Warning: updating program array via MAP_ID, make sure this map is kept open\n"
 428                                        "         by some process or pinned otherwise update will be lost");
 429
 430                         fd = prog_parse_fd(&argc, &argv);
 431                         if (fd < 0)
 432                                 return -1;
 433
 434                         *value_fd = value;
 435                         **value_fd = fd;
 436                 } else {
 437                         argv = parse_bytes(argv, "value", value, value_size);
 438                         if (!argv)
 439                                 return -1;
 440
 441                         fill_per_cpu_value(info, value);
 442                 }
 443
 444                 return parse_elem(argv, info, key, NULL, key_size, value_size,
 445                                   flags, NULL);
 446         } else if (is_prefix(*argv, "any") || is_prefix(*argv, "noexist") ||
 447                    is_prefix(*argv, "exist")) {
 448                 if (!flags) {
 449                         p_err("flags specified multiple times: %s", *argv);
 450                         return -1;
 451                 }
 452
 453                 if (is_prefix(*argv, "any"))
 454                         *flags = BPF_ANY;
 455                 else if (is_prefix(*argv, "noexist"))
 456                         *flags = BPF_NOEXIST;
 457                 else if (is_prefix(*argv, "exist"))
 458                         *flags = BPF_EXIST;
 459
 460                 return parse_elem(argv + 1, info, key, value, key_size,
 461                                   value_size, NULL, value_fd);
 462         }
 463
 464         p_err("expected key or value, got: %s", *argv);
 465         return -1;
 466 }
 467
 468 static void show_map_header_json(struct bpf_map_info *info, json_writer_t *wtr)
 469 {
 470         jsonw_uint_field(wtr, "id", info->id);
 471         if (info->type < ARRAY_SIZE(map_type_name))
 472                 jsonw_string_field(wtr, "type", map_type_name[info->type]);
 473         else
 474                 jsonw_uint_field(wtr, "type", info->type);
 475
 476         if (*info->name)
 477                 jsonw_string_field(wtr, "name", info->name);
 478
 479         jsonw_name(wtr, "flags");
 480         jsonw_printf(wtr, "%d", info->map_flags);
 481 }
 482
 483 static int show_map_close_json(int fd, struct bpf_map_info *info)
 484 {
 485         char *memlock, *frozen_str;
 486         int frozen = 0;
 487
 488         memlock = get_fdinfo(fd, "memlock");
 489         frozen_str = get_fdinfo(fd, "frozen");
 490
 491         jsonw_start_object(json_wtr);
 492
 493         show_map_header_json(info, json_wtr);
 494
 495         print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);
 496
 497         jsonw_uint_field(json_wtr, "bytes_key", info->key_size);
 498         jsonw_uint_field(json_wtr, "bytes_value", info->value_size);
 499         jsonw_uint_field(json_wtr, "max_entries", info->max_entries);
 500
 501         if (memlock)
 502                 jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
 503         free(memlock);
 504
 505         if (info->type == BPF_MAP_TYPE_PROG_ARRAY) {
 506                 char *owner_prog_type = get_fdinfo(fd, "owner_prog_type");
 507                 char *owner_jited = get_fdinfo(fd, "owner_jited");
 508
 509                 if (owner_prog_type) {
 510                         unsigned int prog_type = atoi(owner_prog_type);
 511
 512                         if (prog_type < prog_type_name_size)
 513                                 jsonw_string_field(json_wtr, "owner_prog_type",
 514                                                    prog_type_name[prog_type]);
 515                         else
 516                                 jsonw_uint_field(json_wtr, "owner_prog_type",
 517                                                  prog_type);
 518                 }
 519                 if (owner_jited)
 520                         jsonw_bool_field(json_wtr, "owner_jited",
 521                                          !!atoi(owner_jited));
 522
 523                 free(owner_prog_type);
 524                 free(owner_jited);
 525         }
 526         close(fd);
 527
 528         if (frozen_str) {
 529                 frozen = atoi(frozen_str);
 530                 free(frozen_str);
 531         }
 532         jsonw_int_field(json_wtr, "frozen", frozen);
 533
 534         if (info->btf_id)
 535                 jsonw_int_field(json_wtr, "btf_id", info->btf_id);
 536
 537         if (!hash_empty(map_table.table)) {
 538                 struct pinned_obj *obj;
 539
 540                 jsonw_name(json_wtr, "pinned");
 541                 jsonw_start_array(json_wtr);
 542                 hash_for_each_possible(map_table.table, obj, hash, info->id) {
 543                         if (obj->id == info->id)
 544                                 jsonw_string(json_wtr, obj->path);
 545                 }
 546                 jsonw_end_array(json_wtr);
 547         }
 548
 549         emit_obj_refs_json(&refs_table, info->id, json_wtr);
 550
 551         jsonw_end_object(json_wtr);
 552
 553         return 0;
 554 }
 555
 556 static void show_map_header_plain(struct bpf_map_info *info)
 557 {
 558         printf("%u: ", info->id);
 559         if (info->type < ARRAY_SIZE(map_type_name))
 560                 printf("%s  ", map_type_name[info->type]);
 561         else
 562                 printf("type %u  ", info->type);
 563
 564         if (*info->name)
 565                 printf("name %s  ", info->name);
 566
 567         printf("flags 0x%x", info->map_flags);
 568         print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
 569         printf("\n");
 570 }
 571
 572 static int show_map_close_plain(int fd, struct bpf_map_info *info)
 573 {
 574         char *memlock, *frozen_str;
 575         int frozen = 0;
 576
 577         memlock = get_fdinfo(fd, "memlock");
 578         frozen_str = get_fdinfo(fd, "frozen");
 579
 580         show_map_header_plain(info);
 581         printf("\tkey %uB  value %uB  max_entries %u",
 582                info->key_size, info->value_size, info->max_entries);
 583
 584         if (memlock)
 585                 printf("  memlock %sB", memlock);
 586         free(memlock);
 587
 588         if (info->type == BPF_MAP_TYPE_PROG_ARRAY) {
 589                 char *owner_prog_type = get_fdinfo(fd, "owner_prog_type");
 590                 char *owner_jited = get_fdinfo(fd, "owner_jited");
 591
 592                 if (owner_prog_type || owner_jited)
 593                         printf("\n\t");
 594                 if (owner_prog_type) {
 595                         unsigned int prog_type = atoi(owner_prog_type);
 596
 597                         if (prog_type < prog_type_name_size)
 598                                 printf("owner_prog_type %s  ",
 599                                        prog_type_name[prog_type]);
 600                         else
 601                                 printf("owner_prog_type %d  ", prog_type);
 602                 }
 603                 if (owner_jited)
 604                         printf("owner%s jited",
 605                                atoi(owner_jited) ? "" : " not");
 606
 607                 free(owner_prog_type);
 608                 free(owner_jited);
 609         }
 610         close(fd);
 611
 612         if (!hash_empty(map_table.table)) {
 613                 struct pinned_obj *obj;
 614
 615                 hash_for_each_possible(map_table.table, obj, hash, info->id) {
 616                         if (obj->id == info->id)
 617                                 printf("\n\tpinned %s", obj->path);
 618                 }
 619         }
 620         printf("\n");
 621
 622         if (frozen_str) {
 623                 frozen = atoi(frozen_str);
 624                 free(frozen_str);
 625         }
 626
 627         if (!info->btf_id && !frozen)
 628                 return 0;
 629
 630         printf("\t");
 631
 632         if (info->btf_id)
 633                 printf("btf_id %d", info->btf_id);
 634
 635         if (frozen)
 636                 printf("%sfrozen", info->btf_id ? "  " : "");
 637
 638         emit_obj_refs_plain(&refs_table, info->id, "\n\tpids ");
 639
 640         printf("\n");
 641         return 0;
 642 }
 643
 644 static int do_show_subset(int argc, char **argv)
 645 {
 646         struct bpf_map_info info = {};
 647         __u32 len = sizeof(info);
 648         int *fds = NULL;
 649         int nb_fds, i;
 650         int err = -1;
 651
 652         fds = malloc(sizeof(int));
 653         if (!fds) {
 654                 p_err("mem alloc failed");
 655                 return -1;
 656         }
 657         nb_fds = map_parse_fds(&argc, &argv, &fds);
 658         if (nb_fds < 1)
 659                 goto exit_free;
 660
 661         if (json_output && nb_fds > 1)
 662                 jsonw_start_array(json_wtr);    /* root array */
 663         for (i = 0; i < nb_fds; i++) {
 664                 err = bpf_obj_get_info_by_fd(fds[i], &info, &len);
 665                 if (err) {
 666                         p_err("can't get map info: %s",
 667                               strerror(errno));
 668                         for (; i < nb_fds; i++)
 669                                 close(fds[i]);
 670                         break;
 671                 }
 672
 673                 if (json_output)
 674                         show_map_close_json(fds[i], &info);
 675                 else
 676                         show_map_close_plain(fds[i], &info);
 677
 678                 close(fds[i]);
 679         }
 680         if (json_output && nb_fds > 1)
 681                 jsonw_end_array(json_wtr);      /* root array */
 682
 683 exit_free:
 684         free(fds);
 685         return err;
 686 }
 687
 688 static int do_show(int argc, char **argv)
 689 {
 690         struct bpf_map_info info = {};
 691         __u32 len = sizeof(info);
 692         __u32 id = 0;
 693         int err;
 694         int fd;
 695
 696         if (show_pinned)
 697                 build_pinned_obj_table(&map_table, BPF_OBJ_MAP);
 698         build_obj_refs_table(&refs_table, BPF_OBJ_MAP);
 699
 700         if (argc == 2)
 701                 return do_show_subset(argc, argv);
 702
 703         if (argc)
 704                 return BAD_ARG();
 705
 706         if (json_output)
 707                 jsonw_start_array(json_wtr);
 708         while (true) {
 709                 err = bpf_map_get_next_id(id, &id);
 710                 if (err) {
 711                         if (errno == ENOENT)
 712                                 break;
 713                         p_err("can't get next map: %s%s", strerror(errno),
 714                               errno == EINVAL ? " -- kernel too old?" : "");
 715                         break;
 716                 }
 717
 718                 fd = bpf_map_get_fd_by_id(id);
 719                 if (fd < 0) {
 720                         if (errno == ENOENT)
 721                                 continue;
 722                         p_err("can't get map by id (%u): %s",
 723                               id, strerror(errno));
 724                         break;
 725                 }
 726
 727                 err = bpf_obj_get_info_by_fd(fd, &info, &len);
 728                 if (err) {
 729                         p_err("can't get map info: %s", strerror(errno));
 730                         close(fd);
 731                         break;
 732                 }
 733
 734                 if (json_output)
 735                         show_map_close_json(fd, &info);
 736                 else
 737                         show_map_close_plain(fd, &info);
 738         }
 739         if (json_output)
 740                 jsonw_end_array(json_wtr);
 741
 742         delete_obj_refs_table(&refs_table);
 743
 744         return errno == ENOENT ? 0 : -1;
 745 }
 746
 747 static int dump_map_elem(int fd, void *key, void *value,
 748                          struct bpf_map_info *map_info, struct btf *btf,
 749                          json_writer_t *btf_wtr)
 750 {
 751         if (bpf_map_lookup_elem(fd, key, value)) {
 752                 print_entry_error(map_info, key, errno);
 753                 return -1;
 754         }
 755
 756         if (json_output) {
 757                 print_entry_json(map_info, key, value, btf);
 758         } else if (btf) {
 759                 struct btf_dumper d = {
 760                         .btf = btf,
 761                         .jw = btf_wtr,
 762                         .is_plain_text = true,
 763                 };
 764
 765                 do_dump_btf(&d, map_info, key, value);
 766         } else {
 767                 print_entry_plain(map_info, key, value);
 768         }
 769
 770         return 0;
 771 }
 772
 773 static int maps_have_btf(int *fds, int nb_fds)
 774 {
 775         struct bpf_map_info info = {};
 776         __u32 len = sizeof(info);
 777         int err, i;
 778
 779         for (i = 0; i < nb_fds; i++) {
 780                 err = bpf_obj_get_info_by_fd(fds[i], &info, &len);
 781                 if (err) {
 782                         p_err("can't get map info: %s", strerror(errno));
 783                         return -1;
 784                 }
 785
 786                 if (!info.btf_id)
 787                         return 0;
 788         }
 789
 790         return 1;
 791 }
 792
 793 static struct btf *btf_vmlinux;
 794
 795 static struct btf *get_map_kv_btf(const struct bpf_map_info *info)
 796 {
 797         struct btf *btf = NULL;
 798
 799         if (info->btf_vmlinux_value_type_id) {
 800                 if (!btf_vmlinux) {
 801                         btf_vmlinux = libbpf_find_kernel_btf();
 802                         if (IS_ERR(btf_vmlinux))
 803                                 p_err("failed to get kernel btf");
 804                 }
 805                 return btf_vmlinux;
 806         } else if (info->btf_value_type_id) {
 807                 int err;
 808
 809                 err = btf__get_from_id(info->btf_id, &btf);
 810                 if (err || !btf) {
 811                         p_err("failed to get btf");
 812                         btf = err ? ERR_PTR(err) : ERR_PTR(-ESRCH);
 813                 }
 814         }
 815
 816         return btf;
 817 }
 818
 819 static void free_map_kv_btf(struct btf *btf)
 820 {
 821         if (!IS_ERR(btf) && btf != btf_vmlinux)
 822                 btf__free(btf);
 823 }
 824
 825 static void free_btf_vmlinux(void)
 826 {
 827         if (!IS_ERR(btf_vmlinux))
 828                 btf__free(btf_vmlinux);
 829 }
 830
 831 static int
 832 map_dump(int fd, struct bpf_map_info *info, json_writer_t *wtr,
 833          bool show_header)
 834 {
 835         void *key, *value, *prev_key;
 836         unsigned int num_elems = 0;
 837         struct btf *btf = NULL;
 838         int err;
 839
 840         key = malloc(info->key_size);
 841         value = alloc_value(info);
 842         if (!key || !value) {
 843                 p_err("mem alloc failed");
 844                 err = -1;
 845                 goto exit_free;
 846         }
 847
 848         prev_key = NULL;
 849
 850         if (wtr) {
 851                 btf = get_map_kv_btf(info);
 852                 if (IS_ERR(btf)) {
 853                         err = PTR_ERR(btf);
 854                         goto exit_free;
 855                 }
 856
 857                 if (show_header) {
 858                         jsonw_start_object(wtr);        /* map object */
 859                         show_map_header_json(info, wtr);
 860                         jsonw_name(wtr, "elements");
 861                 }
 862                 jsonw_start_array(wtr);         /* elements */
 863         } else if (show_header) {
 864                 show_map_header_plain(info);
 865         }
 866
 867         if (info->type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY &&
 868             info->value_size != 8)
 869                 p_info("Warning: cannot read values from %s map with value_size != 8",
 870                        map_type_name[info->type]);
 871         while (true) {
 872                 err = bpf_map_get_next_key(fd, prev_key, key);
 873                 if (err) {
 874                         if (errno == ENOENT)
 875                                 err = 0;
 876                         break;
 877                 }
 878                 if (!dump_map_elem(fd, key, value, info, btf, wtr))
 879                         num_elems++;
 880                 prev_key = key;
 881         }
 882
 883         if (wtr) {
 884                 jsonw_end_array(wtr);   /* elements */
 885                 if (show_header)
 886                         jsonw_end_object(wtr);  /* map object */
 887         } else {
 888                 printf("Found %u element%s\n", num_elems,
 889                        num_elems != 1 ? "s" : "");
 890         }
 891
 892 exit_free:
 893         free(key);
 894         free(value);
 895         close(fd);
 896         free_map_kv_btf(btf);
 897
 898         return err;
 899 }
 900
 901 static int do_dump(int argc, char **argv)
 902 {
 903         json_writer_t *wtr = NULL, *btf_wtr = NULL;
 904         struct bpf_map_info info = {};
 905         int nb_fds, i = 0;
 906         __u32 len = sizeof(info);
 907         int *fds = NULL;
 908         int err = -1;
 909
 910         if (argc != 2)
 911                 usage();
 912
 913         fds = malloc(sizeof(int));
 914         if (!fds) {
 915                 p_err("mem alloc failed");
 916                 return -1;
 917         }
 918         nb_fds = map_parse_fds(&argc, &argv, &fds);
 919         if (nb_fds < 1)
 920                 goto exit_free;
 921
 922         if (json_output) {
 923                 wtr = json_wtr;
 924         } else {
 925                 int do_plain_btf;
 926
 927                 do_plain_btf = maps_have_btf(fds, nb_fds);
 928                 if (do_plain_btf < 0)
 929                         goto exit_close;
 930
 931                 if (do_plain_btf) {
 932                         btf_wtr = get_btf_writer();
 933                         wtr = btf_wtr;
 934                         if (!btf_wtr)
 935                                 p_info("failed to create json writer for btf. falling back to plain output");
 936                 }
 937         }
 938
 939         if (wtr && nb_fds > 1)
 940                 jsonw_start_array(wtr); /* root array */
 941         for (i = 0; i < nb_fds; i++) {
 942                 if (bpf_obj_get_info_by_fd(fds[i], &info, &len)) {
 943                         p_err("can't get map info: %s", strerror(errno));
 944                         break;
 945                 }
 946                 err = map_dump(fds[i], &info, wtr, nb_fds > 1);
 947                 if (!wtr && i != nb_fds - 1)
 948                         printf("\n");
 949
 950                 if (err)
 951                         break;
 952                 close(fds[i]);
 953         }
 954         if (wtr && nb_fds > 1)
 955                 jsonw_end_array(wtr);   /* root array */
 956
 957         if (btf_wtr)
 958                 jsonw_destroy(&btf_wtr);
 959 exit_close:
 960         for (; i < nb_fds; i++)
 961                 close(fds[i]);
 962 exit_free:
 963         free(fds);
 964         free_btf_vmlinux();
 965         return err;
 966 }
 967
 968 static int alloc_key_value(struct bpf_map_info *info, void **key, void **value)
 969 {
 970         *key = NULL;
 971         *value = NULL;
 972
 973         if (info->key_size) {
 974                 *key = malloc(info->key_size);
 975                 if (!*key) {
 976                         p_err("key mem alloc failed");
 977                         return -1;
 978                 }
 979         }
 980
 981         if (info->value_size) {
 982                 *value = alloc_value(info);
 983                 if (!*value) {
 984                         p_err("value mem alloc failed");
 985                         free(*key);
 986                         *key = NULL;
 987                         return -1;
 988                 }
 989         }
 990
 991         return 0;
 992 }
 993
 994 static int do_update(int argc, char **argv)
 995 {
 996         struct bpf_map_info info = {};
 997         __u32 len = sizeof(info);
 998         __u32 *value_fd = NULL;
 999         __u32 flags = BPF_ANY;
1000         void *key, *value;
1001         int fd, err;
1002
1003         if (argc < 2)
1004                 usage();
1005
1006         fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1007         if (fd < 0)
1008                 return -1;
1009
1010         err = alloc_key_value(&info, &key, &value);
1011         if (err)
1012                 goto exit_free;
1013
1014         err = parse_elem(argv, &info, key, value, info.key_size,
1015                          info.value_size, &flags, &value_fd);
1016         if (err)
1017                 goto exit_free;
1018
1019         err = bpf_map_update_elem(fd, key, value, flags);
1020         if (err) {
1021                 p_err("update failed: %s", strerror(errno));
1022                 goto exit_free;
1023         }
1024
1025 exit_free:
1026         if (value_fd)
1027                 close(*value_fd);
1028         free(key);
1029         free(value);
1030         close(fd);
1031
1032         if (!err && json_output)
1033                 jsonw_null(json_wtr);
1034         return err;
1035 }
1036
1037 static void print_key_value(struct bpf_map_info *info, void *key,
1038                             void *value)
1039 {
1040         json_writer_t *btf_wtr;
1041         struct btf *btf = NULL;
1042         int err;
1043
1044         err = btf__get_from_id(info->btf_id, &btf);
1045         if (err) {
1046                 p_err("failed to get btf");
1047                 return;
1048         }
1049
1050         if (json_output) {
1051                 print_entry_json(info, key, value, btf);
1052         } else if (btf) {
1053                 /* if here json_wtr wouldn't have been initialised,
1054                  * so let's create separate writer for btf
1055                  */
1056                 btf_wtr = get_btf_writer();
1057                 if (!btf_wtr) {
1058                         p_info("failed to create json writer for btf. falling back to plain output");
1059                         btf__free(btf);
1060                         btf = NULL;
1061                         print_entry_plain(info, key, value);
1062                 } else {
1063                         struct btf_dumper d = {
1064                                 .btf = btf,
1065                                 .jw = btf_wtr,
1066                                 .is_plain_text = true,
1067                         };
1068
1069                         do_dump_btf(&d, info, key, value);
1070                         jsonw_destroy(&btf_wtr);
1071                 }
1072         } else {
1073                 print_entry_plain(info, key, value);
1074         }
1075         btf__free(btf);
1076 }
1077
1078 static int do_lookup(int argc, char **argv)
1079 {
1080         struct bpf_map_info info = {};
1081         __u32 len = sizeof(info);
1082         void *key, *value;
1083         int err;
1084         int fd;
1085
1086         if (argc < 2)
1087                 usage();
1088
1089         fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1090         if (fd < 0)
1091                 return -1;
1092
1093         err = alloc_key_value(&info, &key, &value);
1094         if (err)
1095                 goto exit_free;
1096
1097         err = parse_elem(argv, &info, key, NULL, info.key_size, 0, NULL, NULL);
1098         if (err)
1099                 goto exit_free;
1100
1101         err = bpf_map_lookup_elem(fd, key, value);
1102         if (err) {
1103                 if (errno == ENOENT) {
1104                         if (json_output) {
1105                                 jsonw_null(json_wtr);
1106                         } else {
1107                                 printf("key:\n");
1108                                 fprint_hex(stdout, key, info.key_size, " ");
1109                                 printf("\n\nNot found\n");
1110                         }
1111                 } else {
1112                         p_err("lookup failed: %s", strerror(errno));
1113                 }
1114
1115                 goto exit_free;
1116         }
1117
1118         /* here means bpf_map_lookup_elem() succeeded */
1119         print_key_value(&info, key, value);
1120
1121 exit_free:
1122         free(key);
1123         free(value);
1124         close(fd);
1125
1126         return err;
1127 }
1128
1129 static int do_getnext(int argc, char **argv)
1130 {
1131         struct bpf_map_info info = {};
1132         __u32 len = sizeof(info);
1133         void *key, *nextkey;
1134         int err;
1135         int fd;
1136
1137         if (argc < 2)
1138                 usage();
1139
1140         fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1141         if (fd < 0)
1142                 return -1;
1143
1144         key = malloc(info.key_size);
1145         nextkey = malloc(info.key_size);
1146         if (!key || !nextkey) {
1147                 p_err("mem alloc failed");
1148                 err = -1;
1149                 goto exit_free;
1150         }
1151
1152         if (argc) {
1153                 err = parse_elem(argv, &info, key, NULL, info.key_size, 0,
1154                                  NULL, NULL);
1155                 if (err)
1156                         goto exit_free;
1157         } else {
1158                 free(key);
1159                 key = NULL;
1160         }
1161
1162         err = bpf_map_get_next_key(fd, key, nextkey);
1163         if (err) {
1164                 p_err("can't get next key: %s", strerror(errno));
1165                 goto exit_free;
1166         }
1167
1168         if (json_output) {
1169                 jsonw_start_object(json_wtr);
1170                 if (key) {
1171                         jsonw_name(json_wtr, "key");
1172                         print_hex_data_json(key, info.key_size);
1173                 } else {
1174                         jsonw_null_field(json_wtr, "key");
1175                 }
1176                 jsonw_name(json_wtr, "next_key");
1177                 print_hex_data_json(nextkey, info.key_size);
1178                 jsonw_end_object(json_wtr);
1179         } else {
1180                 if (key) {
1181                         printf("key:\n");
1182                         fprint_hex(stdout, key, info.key_size, " ");
1183                         printf("\n");
1184                 } else {
1185                         printf("key: None\n");
1186                 }
1187                 printf("next key:\n");
1188                 fprint_hex(stdout, nextkey, info.key_size, " ");
1189                 printf("\n");
1190         }
1191
1192 exit_free:
1193         free(nextkey);
1194         free(key);
1195         close(fd);
1196
1197         return err;
1198 }
1199
1200 static int do_delete(int argc, char **argv)
1201 {
1202         struct bpf_map_info info = {};
1203         __u32 len = sizeof(info);
1204         void *key;
1205         int err;
1206         int fd;
1207
1208         if (argc < 2)
1209                 usage();
1210
1211         fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1212         if (fd < 0)
1213                 return -1;
1214
1215         key = malloc(info.key_size);
1216         if (!key) {
1217                 p_err("mem alloc failed");
1218                 err = -1;
1219                 goto exit_free;
1220         }
1221
1222         err = parse_elem(argv, &info, key, NULL, info.key_size, 0, NULL, NULL);
1223         if (err)
1224                 goto exit_free;
1225
1226         err = bpf_map_delete_elem(fd, key);
1227         if (err)
1228                 p_err("delete failed: %s", strerror(errno));
1229
1230 exit_free:
1231         free(key);
1232         close(fd);
1233
1234         if (!err && json_output)
1235                 jsonw_null(json_wtr);
1236         return err;
1237 }
1238
1239 static int do_pin(int argc, char **argv)
1240 {
1241         int err;
1242
1243         err = do_pin_any(argc, argv, map_parse_fd);
1244         if (!err && json_output)
1245                 jsonw_null(json_wtr);
1246         return err;
1247 }
1248
1249 static int do_create(int argc, char **argv)
1250 {
1251         struct bpf_create_map_attr attr = { NULL, };
1252         const char *pinfile;
1253         int err = -1, fd;
1254
1255         if (!REQ_ARGS(7))
1256                 return -1;
1257         pinfile = GET_ARG();
1258
1259         while (argc) {
1260                 if (!REQ_ARGS(2))
1261                         return -1;
1262
1263                 if (is_prefix(*argv, "type")) {
1264                         NEXT_ARG();
1265
1266                         if (attr.map_type) {
1267                                 p_err("map type already specified");
1268                                 goto exit;
1269                         }
1270
1271                         attr.map_type = map_type_from_str(*argv);
1272                         if ((int)attr.map_type < 0) {
1273                                 p_err("unrecognized map type: %s", *argv);
1274                                 goto exit;
1275                         }
1276                         NEXT_ARG();
1277                 } else if (is_prefix(*argv, "name")) {
1278                         NEXT_ARG();
1279                         attr.name = GET_ARG();
1280                 } else if (is_prefix(*argv, "key")) {
1281                         if (parse_u32_arg(&argc, &argv, &attr.key_size,
1282                                           "key size"))
1283                                 goto exit;
1284                 } else if (is_prefix(*argv, "value")) {
1285                         if (parse_u32_arg(&argc, &argv, &attr.value_size,
1286                                           "value size"))
1287                                 goto exit;
1288                 } else if (is_prefix(*argv, "entries")) {
1289                         if (parse_u32_arg(&argc, &argv, &attr.max_entries,
1290                                           "max entries"))
1291                                 goto exit;
1292                 } else if (is_prefix(*argv, "flags")) {
1293                         if (parse_u32_arg(&argc, &argv, &attr.map_flags,
1294                                           "flags"))
1295                                 goto exit;
1296                 } else if (is_prefix(*argv, "dev")) {
1297                         NEXT_ARG();
1298
1299                         if (attr.map_ifindex) {
1300                                 p_err("offload device already specified");
1301                                 goto exit;
1302                         }
1303
1304                         attr.map_ifindex = if_nametoindex(*argv);
1305                         if (!attr.map_ifindex) {
1306                                 p_err("unrecognized netdevice '%s': %s",
1307                                       *argv, strerror(errno));
1308                                 goto exit;
1309                         }
1310                         NEXT_ARG();
1311                 } else if (is_prefix(*argv, "inner_map")) {
1312                         struct bpf_map_info info = {};
1313                         __u32 len = sizeof(info);
1314                         int inner_map_fd;
1315
1316                         NEXT_ARG();
1317                         if (!REQ_ARGS(2))
1318                                 usage();
1319                         inner_map_fd = map_parse_fd_and_info(&argc, &argv,
1320                                                              &info, &len);
1321                         if (inner_map_fd < 0)
1322                                 return -1;
1323                         attr.inner_map_fd = inner_map_fd;
1324                 } else {
1325                         p_err("unknown arg %s", *argv);
1326                         goto exit;
1327                 }
1328         }
1329
1330         if (!attr.name) {
1331                 p_err("map name not specified");
1332                 goto exit;
1333         }
1334
1335         set_max_rlimit();
1336
1337         fd = bpf_create_map_xattr(&attr);
1338         if (fd < 0) {
1339                 p_err("map create failed: %s", strerror(errno));
1340                 goto exit;
1341         }
1342
1343         err = do_pin_fd(fd, pinfile);
1344         close(fd);
1345         if (err)
1346                 goto exit;
1347
1348         if (json_output)
1349                 jsonw_null(json_wtr);
1350
1351 exit:
1352         if (attr.inner_map_fd > 0)
1353                 close(attr.inner_map_fd);
1354
1355         return err;
1356 }
1357
1358 static int do_pop_dequeue(int argc, char **argv)
1359 {
1360         struct bpf_map_info info = {};
1361         __u32 len = sizeof(info);
1362         void *key, *value;
1363         int err;
1364         int fd;
1365
1366         if (argc < 2)
1367                 usage();
1368
1369         fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1370         if (fd < 0)
1371                 return -1;
1372
1373         err = alloc_key_value(&info, &key, &value);
1374         if (err)
1375                 goto exit_free;
1376
1377         err = bpf_map_lookup_and_delete_elem(fd, key, value);
1378         if (err) {
1379                 if (errno == ENOENT) {
1380                         if (json_output)
1381                                 jsonw_null(json_wtr);
1382                         else
1383                                 printf("Error: empty map\n");
1384                 } else {
1385                         p_err("pop failed: %s", strerror(errno));
1386                 }
1387
1388                 goto exit_free;
1389         }
1390
1391         print_key_value(&info, key, value);
1392
1393 exit_free:
1394         free(key);
1395         free(value);
1396         close(fd);
1397
1398         return err;
1399 }
1400
1401 static int do_freeze(int argc, char **argv)
1402 {
1403         int err, fd;
1404
1405         if (!REQ_ARGS(2))
1406                 return -1;
1407
1408         fd = map_parse_fd(&argc, &argv);
1409         if (fd < 0)
1410                 return -1;
1411
1412         if (argc) {
1413                 close(fd);
1414                 return BAD_ARG();
1415         }
1416
1417         err = bpf_map_freeze(fd);
1418         close(fd);
1419         if (err) {
1420                 p_err("failed to freeze map: %s", strerror(errno));
1421                 return err;
1422         }
1423
1424         if (json_output)
1425                 jsonw_null(json_wtr);
1426
1427         return 0;
1428 }
1429
1430 static int do_help(int argc, char **argv)
1431 {
1432         if (json_output) {
1433                 jsonw_null(json_wtr);
1434                 return 0;
1435         }
1436
1437         fprintf(stderr,
1438                 "Usage: %1$s %2$s { show | list }   [MAP]\n"
1439                 "       %1$s %2$s create     FILE type TYPE key KEY_SIZE value VALUE_SIZE \\\n"
1440                 "                                  entries MAX_ENTRIES name NAME [flags FLAGS] \\\n"
1441                 "                                  [inner_map MAP] [dev NAME]\n"
1442                 "       %1$s %2$s dump       MAP\n"
1443                 "       %1$s %2$s update     MAP [key DATA] [value VALUE] [UPDATE_FLAGS]\n"
1444                 "       %1$s %2$s lookup     MAP [key DATA]\n"
1445                 "       %1$s %2$s getnext    MAP [key DATA]\n"
1446                 "       %1$s %2$s delete     MAP  key DATA\n"
1447                 "       %1$s %2$s pin        MAP  FILE\n"
1448                 "       %1$s %2$s event_pipe MAP [cpu N index M]\n"
1449                 "       %1$s %2$s peek       MAP\n"
1450                 "       %1$s %2$s push       MAP value VALUE\n"
1451                 "       %1$s %2$s pop        MAP\n"
1452                 "       %1$s %2$s enqueue    MAP value VALUE\n"
1453                 "       %1$s %2$s dequeue    MAP\n"
1454                 "       %1$s %2$s freeze     MAP\n"
1455                 "       %1$s %2$s help\n"
1456                 "\n"
1457                 "       " HELP_SPEC_MAP "\n"
1458                 "       DATA := { [hex] BYTES }\n"
1459                 "       " HELP_SPEC_PROGRAM "\n"
1460                 "       VALUE := { DATA | MAP | PROG }\n"
1461                 "       UPDATE_FLAGS := { any | exist | noexist }\n"
1462                 "       TYPE := { hash | array | prog_array | perf_event_array | percpu_hash |\n"
1463                 "                 percpu_array | stack_trace | cgroup_array | lru_hash |\n"
1464                 "                 lru_percpu_hash | lpm_trie | array_of_maps | hash_of_maps |\n"
1465                 "                 devmap | devmap_hash | sockmap | cpumap | xskmap | sockhash |\n"
1466                 "                 cgroup_storage | reuseport_sockarray | percpu_cgroup_storage |\n"
1467                 "                 queue | stack | sk_storage | struct_ops | ringbuf | inode_storage }\n"
1468                 "       " HELP_SPEC_OPTIONS "\n"
1469                 "",
1470                 bin_name, argv[-2]);
1471
1472         return 0;
1473 }
1474
1475 static const struct cmd cmds[] = {
1476         { "show",       do_show },
1477         { "list",       do_show },
1478         { "help",       do_help },
1479         { "dump",       do_dump },
1480         { "update",     do_update },
1481         { "lookup",     do_lookup },
1482         { "getnext",    do_getnext },
1483         { "delete",     do_delete },
1484         { "pin",        do_pin },
1485         { "event_pipe", do_event_pipe },
1486         { "create",     do_create },
1487         { "peek",       do_lookup },
1488         { "push",       do_update },
1489         { "enqueue",    do_update },
1490         { "pop",        do_pop_dequeue },
1491         { "dequeue",    do_pop_dequeue },
1492         { "freeze",     do_freeze },
1493         { 0 }
1494 };
1495
1496 int do_map(int argc, char **argv)
1497 {
1498         return cmd_select(cmds, argc, argv, do_help);
1499 }