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 <stdarg.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <time.h>
  12 #include <unistd.h>
  13 #include <net/if.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16
  17 #include <linux/err.h>
  18 #include <linux/sizes.h>
  19
  20 #include <bpf.h>
  21 #include <btf.h>
  22 #include <libbpf.h>
  23
  24 #include "cfg.h"
  25 #include "main.h"
  26 #include "xlated_dumper.h"
  27
  28 static const char * const attach_type_strings[] = {
  29         [BPF_SK_SKB_STREAM_PARSER] = "stream_parser",
  30         [BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict",
  31         [BPF_SK_MSG_VERDICT] = "msg_verdict",
  32         [BPF_FLOW_DISSECTOR] = "flow_dissector",
  33         [__MAX_BPF_ATTACH_TYPE] = NULL,
  34 };
  35
  36 static enum bpf_attach_type parse_attach_type(const char *str)
  37 {
  38         enum bpf_attach_type type;
  39
  40         for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) {
  41                 if (attach_type_strings[type] &&
  42                     is_prefix(str, attach_type_strings[type]))
  43                         return type;
  44         }
  45
  46         return __MAX_BPF_ATTACH_TYPE;
  47 }
  48
  49 static void print_boot_time(__u64 nsecs, char *buf, unsigned int size)
  50 {
  51         struct timespec real_time_ts, boot_time_ts;
  52         time_t wallclock_secs;
  53         struct tm load_tm;
  54
  55         buf[--size] = '\0';
  56
  57         if (clock_gettime(CLOCK_REALTIME, &real_time_ts) ||
  58             clock_gettime(CLOCK_BOOTTIME, &boot_time_ts)) {
  59                 perror("Can't read clocks");
  60                 snprintf(buf, size, "%llu", nsecs / 1000000000);
  61                 return;
  62         }
  63
  64         wallclock_secs = (real_time_ts.tv_sec - boot_time_ts.tv_sec) +
  65                 (real_time_ts.tv_nsec - boot_time_ts.tv_nsec + nsecs) /
  66                 1000000000;
  67
  68
  69         if (!localtime_r(&wallclock_secs, &load_tm)) {
  70                 snprintf(buf, size, "%llu", nsecs / 1000000000);
  71                 return;
  72         }
  73
  74         if (json_output)
  75                 strftime(buf, size, "%s", &load_tm);
  76         else
  77                 strftime(buf, size, "%FT%T%z", &load_tm);
  78 }
  79
  80 static int prog_fd_by_tag(unsigned char *tag)
  81 {
  82         unsigned int id = 0;
  83         int err;
  84         int fd;
  85
  86         while (true) {
  87                 struct bpf_prog_info info = {};
  88                 __u32 len = sizeof(info);
  89
  90                 err = bpf_prog_get_next_id(id, &id);
  91                 if (err) {
  92                         p_err("%s", strerror(errno));
  93                         return -1;
  94                 }
  95
  96                 fd = bpf_prog_get_fd_by_id(id);
  97                 if (fd < 0) {
  98                         p_err("can't get prog by id (%u): %s",
  99                               id, strerror(errno));
 100                         return -1;
 101                 }
 102
 103                 err = bpf_obj_get_info_by_fd(fd, &info, &len);
 104                 if (err) {
 105                         p_err("can't get prog info (%u): %s",
 106                               id, strerror(errno));
 107                         close(fd);
 108                         return -1;
 109                 }
 110
 111                 if (!memcmp(tag, info.tag, BPF_TAG_SIZE))
 112                         return fd;
 113
 114                 close(fd);
 115         }
 116 }
 117
 118 int prog_parse_fd(int *argc, char ***argv)
 119 {
 120         int fd;
 121
 122         if (is_prefix(**argv, "id")) {
 123                 unsigned int id;
 124                 char *endptr;
 125
 126                 NEXT_ARGP();
 127
 128                 id = strtoul(**argv, &endptr, 0);
 129                 if (*endptr) {
 130                         p_err("can't parse %s as ID", **argv);
 131                         return -1;
 132                 }
 133                 NEXT_ARGP();
 134
 135                 fd = bpf_prog_get_fd_by_id(id);
 136                 if (fd < 0)
 137                         p_err("get by id (%u): %s", id, strerror(errno));
 138                 return fd;
 139         } else if (is_prefix(**argv, "tag")) {
 140                 unsigned char tag[BPF_TAG_SIZE];
 141
 142                 NEXT_ARGP();
 143
 144                 if (sscanf(**argv, BPF_TAG_FMT, tag, tag + 1, tag + 2,
 145                            tag + 3, tag + 4, tag + 5, tag + 6, tag + 7)
 146                     != BPF_TAG_SIZE) {
 147                         p_err("can't parse tag");
 148                         return -1;
 149                 }
 150                 NEXT_ARGP();
 151
 152                 return prog_fd_by_tag(tag);
 153         } else if (is_prefix(**argv, "pinned")) {
 154                 char *path;
 155
 156                 NEXT_ARGP();
 157
 158                 path = **argv;
 159                 NEXT_ARGP();
 160
 161                 return open_obj_pinned_any(path, BPF_OBJ_PROG);
 162         }
 163
 164         p_err("expected 'id', 'tag' or 'pinned', got: '%s'?", **argv);
 165         return -1;
 166 }
 167
 168 static void show_prog_maps(int fd, u32 num_maps)
 169 {
 170         struct bpf_prog_info info = {};
 171         __u32 len = sizeof(info);
 172         __u32 map_ids[num_maps];
 173         unsigned int i;
 174         int err;
 175
 176         info.nr_map_ids = num_maps;
 177         info.map_ids = ptr_to_u64(map_ids);
 178
 179         err = bpf_obj_get_info_by_fd(fd, &info, &len);
 180         if (err || !info.nr_map_ids)
 181                 return;
 182
 183         if (json_output) {
 184                 jsonw_name(json_wtr, "map_ids");
 185                 jsonw_start_array(json_wtr);
 186                 for (i = 0; i < info.nr_map_ids; i++)
 187                         jsonw_uint(json_wtr, map_ids[i]);
 188                 jsonw_end_array(json_wtr);
 189         } else {
 190                 printf("  map_ids ");
 191                 for (i = 0; i < info.nr_map_ids; i++)
 192                         printf("%u%s", map_ids[i],
 193                                i == info.nr_map_ids - 1 ? "" : ",");
 194         }
 195 }
 196
 197 static void print_prog_json(struct bpf_prog_info *info, int fd)
 198 {
 199         char *memlock;
 200
 201         jsonw_start_object(json_wtr);
 202         jsonw_uint_field(json_wtr, "id", info->id);
 203         if (info->type < ARRAY_SIZE(prog_type_name))
 204                 jsonw_string_field(json_wtr, "type",
 205                                    prog_type_name[info->type]);
 206         else
 207                 jsonw_uint_field(json_wtr, "type", info->type);
 208
 209         if (*info->name)
 210                 jsonw_string_field(json_wtr, "name", info->name);
 211
 212         jsonw_name(json_wtr, "tag");
 213         jsonw_printf(json_wtr, "\"" BPF_TAG_FMT "\"",
 214                      info->tag[0], info->tag[1], info->tag[2], info->tag[3],
 215                      info->tag[4], info->tag[5], info->tag[6], info->tag[7]);
 216
 217         jsonw_bool_field(json_wtr, "gpl_compatible", info->gpl_compatible);
 218         if (info->run_time_ns) {
 219                 jsonw_uint_field(json_wtr, "run_time_ns", info->run_time_ns);
 220                 jsonw_uint_field(json_wtr, "run_cnt", info->run_cnt);
 221         }
 222
 223         print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);
 224
 225         if (info->load_time) {
 226                 char buf[32];
 227
 228                 print_boot_time(info->load_time, buf, sizeof(buf));
 229
 230                 /* Piggy back on load_time, since 0 uid is a valid one */
 231                 jsonw_name(json_wtr, "loaded_at");
 232                 jsonw_printf(json_wtr, "%s", buf);
 233                 jsonw_uint_field(json_wtr, "uid", info->created_by_uid);
 234         }
 235
 236         jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len);
 237
 238         if (info->jited_prog_len) {
 239                 jsonw_bool_field(json_wtr, "jited", true);
 240                 jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len);
 241         } else {
 242                 jsonw_bool_field(json_wtr, "jited", false);
 243         }
 244
 245         memlock = get_fdinfo(fd, "memlock");
 246         if (memlock)
 247                 jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
 248         free(memlock);
 249
 250         if (info->nr_map_ids)
 251                 show_prog_maps(fd, info->nr_map_ids);
 252
 253         if (info->btf_id)
 254                 jsonw_int_field(json_wtr, "btf_id", info->btf_id);
 255
 256         if (!hash_empty(prog_table.table)) {
 257                 struct pinned_obj *obj;
 258
 259                 jsonw_name(json_wtr, "pinned");
 260                 jsonw_start_array(json_wtr);
 261                 hash_for_each_possible(prog_table.table, obj, hash, info->id) {
 262                         if (obj->id == info->id)
 263                                 jsonw_string(json_wtr, obj->path);
 264                 }
 265                 jsonw_end_array(json_wtr);
 266         }
 267
 268         jsonw_end_object(json_wtr);
 269 }
 270
 271 static void print_prog_plain(struct bpf_prog_info *info, int fd)
 272 {
 273         char *memlock;
 274
 275         printf("%u: ", info->id);
 276         if (info->type < ARRAY_SIZE(prog_type_name))
 277                 printf("%s  ", prog_type_name[info->type]);
 278         else
 279                 printf("type %u  ", info->type);
 280
 281         if (*info->name)
 282                 printf("name %s  ", info->name);
 283
 284         printf("tag ");
 285         fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");
 286         print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
 287         printf("%s", info->gpl_compatible ? "  gpl" : "");
 288         if (info->run_time_ns)
 289                 printf(" run_time_ns %lld run_cnt %lld",
 290                        info->run_time_ns, info->run_cnt);
 291         printf("\n");
 292
 293         if (info->load_time) {
 294                 char buf[32];
 295
 296                 print_boot_time(info->load_time, buf, sizeof(buf));
 297
 298                 /* Piggy back on load_time, since 0 uid is a valid one */
 299                 printf("\tloaded_at %s  uid %u\n", buf, info->created_by_uid);
 300         }
 301
 302         printf("\txlated %uB", info->xlated_prog_len);
 303
 304         if (info->jited_prog_len)
 305                 printf("  jited %uB", info->jited_prog_len);
 306         else
 307                 printf("  not jited");
 308
 309         memlock = get_fdinfo(fd, "memlock");
 310         if (memlock)
 311                 printf("  memlock %sB", memlock);
 312         free(memlock);
 313
 314         if (info->nr_map_ids)
 315                 show_prog_maps(fd, info->nr_map_ids);
 316
 317         if (!hash_empty(prog_table.table)) {
 318                 struct pinned_obj *obj;
 319
 320                 hash_for_each_possible(prog_table.table, obj, hash, info->id) {
 321                         if (obj->id == info->id)
 322                                 printf("\n\tpinned %s", obj->path);
 323                 }
 324         }
 325
 326         if (info->btf_id)
 327                 printf("\n\tbtf_id %d", info->btf_id);
 328
 329         printf("\n");
 330 }
 331
 332 static int show_prog(int fd)
 333 {
 334         struct bpf_prog_info info = {};
 335         __u32 len = sizeof(info);
 336         int err;
 337
 338         err = bpf_obj_get_info_by_fd(fd, &info, &len);
 339         if (err) {
 340                 p_err("can't get prog info: %s", strerror(errno));
 341                 return -1;
 342         }
 343
 344         if (json_output)
 345                 print_prog_json(&info, fd);
 346         else
 347                 print_prog_plain(&info, fd);
 348
 349         return 0;
 350 }
 351
 352 static int do_show(int argc, char **argv)
 353 {
 354         __u32 id = 0;
 355         int err;
 356         int fd;
 357
 358         if (show_pinned)
 359                 build_pinned_obj_table(&prog_table, BPF_OBJ_PROG);
 360
 361         if (argc == 2) {
 362                 fd = prog_parse_fd(&argc, &argv);
 363                 if (fd < 0)
 364                         return -1;
 365
 366                 return show_prog(fd);
 367         }
 368
 369         if (argc)
 370                 return BAD_ARG();
 371
 372         if (json_output)
 373                 jsonw_start_array(json_wtr);
 374         while (true) {
 375                 err = bpf_prog_get_next_id(id, &id);
 376                 if (err) {
 377                         if (errno == ENOENT) {
 378                                 err = 0;
 379                                 break;
 380                         }
 381                         p_err("can't get next program: %s%s", strerror(errno),
 382                               errno == EINVAL ? " -- kernel too old?" : "");
 383                         err = -1;
 384                         break;
 385                 }
 386
 387                 fd = bpf_prog_get_fd_by_id(id);
 388                 if (fd < 0) {
 389                         if (errno == ENOENT)
 390                                 continue;
 391                         p_err("can't get prog by id (%u): %s",
 392                               id, strerror(errno));
 393                         err = -1;
 394                         break;
 395                 }
 396
 397                 err = show_prog(fd);
 398                 close(fd);
 399                 if (err)
 400                         break;
 401         }
 402
 403         if (json_output)
 404                 jsonw_end_array(json_wtr);
 405
 406         return err;
 407 }
 408
 409 static int do_dump(int argc, char **argv)
 410 {
 411         struct bpf_prog_info_linear *info_linear;
 412         struct bpf_prog_linfo *prog_linfo = NULL;
 413         enum {DUMP_JITED, DUMP_XLATED} mode;
 414         const char *disasm_opt = NULL;
 415         struct bpf_prog_info *info;
 416         struct dump_data dd = {};
 417         void *func_info = NULL;
 418         struct btf *btf = NULL;
 419         char *filepath = NULL;
 420         bool opcodes = false;
 421         bool visual = false;
 422         char func_sig[1024];
 423         unsigned char *buf;
 424         bool linum = false;
 425         __u32 member_len;
 426         __u64 arrays;
 427         ssize_t n;
 428         int fd;
 429
 430         if (is_prefix(*argv, "jited")) {
 431                 if (disasm_init())
 432                         return -1;
 433                 mode = DUMP_JITED;
 434         } else if (is_prefix(*argv, "xlated")) {
 435                 mode = DUMP_XLATED;
 436         } else {
 437                 p_err("expected 'xlated' or 'jited', got: %s", *argv);
 438                 return -1;
 439         }
 440         NEXT_ARG();
 441
 442         if (argc < 2)
 443                 usage();
 444
 445         fd = prog_parse_fd(&argc, &argv);
 446         if (fd < 0)
 447                 return -1;
 448
 449         if (is_prefix(*argv, "file")) {
 450                 NEXT_ARG();
 451                 if (!argc) {
 452                         p_err("expected file path");
 453                         return -1;
 454                 }
 455
 456                 filepath = *argv;
 457                 NEXT_ARG();
 458         } else if (is_prefix(*argv, "opcodes")) {
 459                 opcodes = true;
 460                 NEXT_ARG();
 461         } else if (is_prefix(*argv, "visual")) {
 462                 visual = true;
 463                 NEXT_ARG();
 464         } else if (is_prefix(*argv, "linum")) {
 465                 linum = true;
 466                 NEXT_ARG();
 467         }
 468
 469         if (argc) {
 470                 usage();
 471                 return -1;
 472         }
 473
 474         if (mode == DUMP_JITED)
 475                 arrays = 1UL << BPF_PROG_INFO_JITED_INSNS;
 476         else
 477                 arrays = 1UL << BPF_PROG_INFO_XLATED_INSNS;
 478
 479         arrays |= 1UL << BPF_PROG_INFO_JITED_KSYMS;
 480         arrays |= 1UL << BPF_PROG_INFO_JITED_FUNC_LENS;
 481         arrays |= 1UL << BPF_PROG_INFO_FUNC_INFO;
 482         arrays |= 1UL << BPF_PROG_INFO_LINE_INFO;
 483         arrays |= 1UL << BPF_PROG_INFO_JITED_LINE_INFO;
 484
 485         info_linear = bpf_program__get_prog_info_linear(fd, arrays);
 486         close(fd);
 487         if (IS_ERR_OR_NULL(info_linear)) {
 488                 p_err("can't get prog info: %s", strerror(errno));
 489                 return -1;
 490         }
 491
 492         info = &info_linear->info;
 493         if (mode == DUMP_JITED) {
 494                 if (info->jited_prog_len == 0) {
 495                         p_info("no instructions returned");
 496                         goto err_free;
 497                 }
 498                 buf = (unsigned char *)(info->jited_prog_insns);
 499                 member_len = info->jited_prog_len;
 500         } else {        /* DUMP_XLATED */
 501                 if (info->xlated_prog_len == 0) {
 502                         p_err("error retrieving insn dump: kernel.kptr_restrict set?");
 503                         goto err_free;
 504                 }
 505                 buf = (unsigned char *)info->xlated_prog_insns;
 506                 member_len = info->xlated_prog_len;
 507         }
 508
 509         if (info->btf_id && btf__get_from_id(info->btf_id, &btf)) {
 510                 p_err("failed to get btf");
 511                 goto err_free;
 512         }
 513
 514         func_info = (void *)info->func_info;
 515
 516         if (info->nr_line_info) {
 517                 prog_linfo = bpf_prog_linfo__new(info);
 518                 if (!prog_linfo)
 519                         p_info("error in processing bpf_line_info.  continue without it.");
 520         }
 521
 522         if (filepath) {
 523                 fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
 524                 if (fd < 0) {
 525                         p_err("can't open file %s: %s", filepath,
 526                               strerror(errno));
 527                         goto err_free;
 528                 }
 529
 530                 n = write(fd, buf, member_len);
 531                 close(fd);
 532                 if (n != member_len) {
 533                         p_err("error writing output file: %s",
 534                               n < 0 ? strerror(errno) : "short write");
 535                         goto err_free;
 536                 }
 537
 538                 if (json_output)
 539                         jsonw_null(json_wtr);
 540         } else if (mode == DUMP_JITED) {
 541                 const char *name = NULL;
 542
 543                 if (info->ifindex) {
 544                         name = ifindex_to_bfd_params(info->ifindex,
 545                                                      info->netns_dev,
 546                                                      info->netns_ino,
 547                                                      &disasm_opt);
 548                         if (!name)
 549                                 goto err_free;
 550                 }
 551
 552                 if (info->nr_jited_func_lens && info->jited_func_lens) {
 553                         struct kernel_sym *sym = NULL;
 554                         struct bpf_func_info *record;
 555                         char sym_name[SYM_MAX_NAME];
 556                         unsigned char *img = buf;
 557                         __u64 *ksyms = NULL;
 558                         __u32 *lens;
 559                         __u32 i;
 560                         if (info->nr_jited_ksyms) {
 561                                 kernel_syms_load(&dd);
 562                                 ksyms = (__u64 *) info->jited_ksyms;
 563                         }
 564
 565                         if (json_output)
 566                                 jsonw_start_array(json_wtr);
 567
 568                         lens = (__u32 *) info->jited_func_lens;
 569                         for (i = 0; i < info->nr_jited_func_lens; i++) {
 570                                 if (ksyms) {
 571                                         sym = kernel_syms_search(&dd, ksyms[i]);
 572                                         if (sym)
 573                                                 sprintf(sym_name, "%s", sym->name);
 574                                         else
 575                                                 sprintf(sym_name, "0x%016llx", ksyms[i]);
 576                                 } else {
 577                                         strcpy(sym_name, "unknown");
 578                                 }
 579
 580                                 if (func_info) {
 581                                         record = func_info + i * info->func_info_rec_size;
 582                                         btf_dumper_type_only(btf, record->type_id,
 583                                                              func_sig,
 584                                                              sizeof(func_sig));
 585                                 }
 586
 587                                 if (json_output) {
 588                                         jsonw_start_object(json_wtr);
 589                                         if (func_info && func_sig[0] != '\0') {
 590                                                 jsonw_name(json_wtr, "proto");
 591                                                 jsonw_string(json_wtr, func_sig);
 592                                         }
 593                                         jsonw_name(json_wtr, "name");
 594                                         jsonw_string(json_wtr, sym_name);
 595                                         jsonw_name(json_wtr, "insns");
 596                                 } else {
 597                                         if (func_info && func_sig[0] != '\0')
 598                                                 printf("%s:\n", func_sig);
 599                                         printf("%s:\n", sym_name);
 600                                 }
 601
 602                                 disasm_print_insn(img, lens[i], opcodes,
 603                                                   name, disasm_opt, btf,
 604                                                   prog_linfo, ksyms[i], i,
 605                                                   linum);
 606
 607                                 img += lens[i];
 608
 609                                 if (json_output)
 610                                         jsonw_end_object(json_wtr);
 611                                 else
 612                                         printf("\n");
 613                         }
 614
 615                         if (json_output)
 616                                 jsonw_end_array(json_wtr);
 617                 } else {
 618                         disasm_print_insn(buf, member_len, opcodes, name,
 619                                           disasm_opt, btf, NULL, 0, 0, false);
 620                 }
 621         } else if (visual) {
 622                 if (json_output)
 623                         jsonw_null(json_wtr);
 624                 else
 625                         dump_xlated_cfg(buf, member_len);
 626         } else {
 627                 kernel_syms_load(&dd);
 628                 dd.nr_jited_ksyms = info->nr_jited_ksyms;
 629                 dd.jited_ksyms = (__u64 *) info->jited_ksyms;
 630                 dd.btf = btf;
 631                 dd.func_info = func_info;
 632                 dd.finfo_rec_size = info->func_info_rec_size;
 633                 dd.prog_linfo = prog_linfo;
 634
 635                 if (json_output)
 636                         dump_xlated_json(&dd, buf, member_len, opcodes,
 637                                          linum);
 638                 else
 639                         dump_xlated_plain(&dd, buf, member_len, opcodes,
 640                                           linum);
 641                 kernel_syms_destroy(&dd);
 642         }
 643
 644         free(info_linear);
 645         return 0;
 646
 647 err_free:
 648         free(info_linear);
 649         return -1;
 650 }
 651
 652 static int do_pin(int argc, char **argv)
 653 {
 654         int err;
 655
 656         err = do_pin_any(argc, argv, bpf_prog_get_fd_by_id);
 657         if (!err && json_output)
 658                 jsonw_null(json_wtr);
 659         return err;
 660 }
 661
 662 struct map_replace {
 663         int idx;
 664         int fd;
 665         char *name;
 666 };
 667
 668 static int map_replace_compar(const void *p1, const void *p2)
 669 {
 670         const struct map_replace *a = p1, *b = p2;
 671
 672         return a->idx - b->idx;
 673 }
 674
 675 static int parse_attach_detach_args(int argc, char **argv, int *progfd,
 676                                     enum bpf_attach_type *attach_type,
 677                                     int *mapfd)
 678 {
 679         if (!REQ_ARGS(3))
 680                 return -EINVAL;
 681
 682         *progfd = prog_parse_fd(&argc, &argv);
 683         if (*progfd < 0)
 684                 return *progfd;
 685
 686         *attach_type = parse_attach_type(*argv);
 687         if (*attach_type == __MAX_BPF_ATTACH_TYPE) {
 688                 p_err("invalid attach/detach type");
 689                 return -EINVAL;
 690         }
 691
 692         if (*attach_type == BPF_FLOW_DISSECTOR) {
 693                 *mapfd = -1;
 694                 return 0;
 695         }
 696
 697         NEXT_ARG();
 698         if (!REQ_ARGS(2))
 699                 return -EINVAL;
 700
 701         *mapfd = map_parse_fd(&argc, &argv);
 702         if (*mapfd < 0)
 703                 return *mapfd;
 704
 705         return 0;
 706 }
 707
 708 static int do_attach(int argc, char **argv)
 709 {
 710         enum bpf_attach_type attach_type;
 711         int err, progfd;
 712         int mapfd;
 713
 714         err = parse_attach_detach_args(argc, argv,
 715                                        &progfd, &attach_type, &mapfd);
 716         if (err)
 717                 return err;
 718
 719         err = bpf_prog_attach(progfd, mapfd, attach_type, 0);
 720         if (err) {
 721                 p_err("failed prog attach to map");
 722                 return -EINVAL;
 723         }
 724
 725         if (json_output)
 726                 jsonw_null(json_wtr);
 727         return 0;
 728 }
 729
 730 static int do_detach(int argc, char **argv)
 731 {
 732         enum bpf_attach_type attach_type;
 733         int err, progfd;
 734         int mapfd;
 735
 736         err = parse_attach_detach_args(argc, argv,
 737                                        &progfd, &attach_type, &mapfd);
 738         if (err)
 739                 return err;
 740
 741         err = bpf_prog_detach2(progfd, mapfd, attach_type);
 742         if (err) {
 743                 p_err("failed prog detach from map");
 744                 return -EINVAL;
 745         }
 746
 747         if (json_output)
 748                 jsonw_null(json_wtr);
 749         return 0;
 750 }
 751
 752 static int check_single_stdin(char *file_data_in, char *file_ctx_in)
 753 {
 754         if (file_data_in && file_ctx_in &&
 755             !strcmp(file_data_in, "-") && !strcmp(file_ctx_in, "-")) {
 756                 p_err("cannot use standard input for both data_in and ctx_in");
 757                 return -1;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int get_run_data(const char *fname, void **data_ptr, unsigned int *size)
 764 {
 765         size_t block_size = 256;
 766         size_t buf_size = block_size;
 767         size_t nb_read = 0;
 768         void *tmp;
 769         FILE *f;
 770
 771         if (!fname) {
 772                 *data_ptr = NULL;
 773                 *size = 0;
 774                 return 0;
 775         }
 776
 777         if (!strcmp(fname, "-"))
 778                 f = stdin;
 779         else
 780                 f = fopen(fname, "r");
 781         if (!f) {
 782                 p_err("failed to open %s: %s", fname, strerror(errno));
 783                 return -1;
 784         }
 785
 786         *data_ptr = malloc(block_size);
 787         if (!*data_ptr) {
 788                 p_err("failed to allocate memory for data_in/ctx_in: %s",
 789                       strerror(errno));
 790                 goto err_fclose;
 791         }
 792
 793         while ((nb_read += fread(*data_ptr + nb_read, 1, block_size, f))) {
 794                 if (feof(f))
 795                         break;
 796                 if (ferror(f)) {
 797                         p_err("failed to read data_in/ctx_in from %s: %s",
 798                               fname, strerror(errno));
 799                         goto err_free;
 800                 }
 801                 if (nb_read > buf_size - block_size) {
 802                         if (buf_size == UINT32_MAX) {
 803                                 p_err("data_in/ctx_in is too long (max: %d)",
 804                                       UINT32_MAX);
 805                                 goto err_free;
 806                         }
 807                         /* No space for fread()-ing next chunk; realloc() */
 808                         buf_size *= 2;
 809                         tmp = realloc(*data_ptr, buf_size);
 810                         if (!tmp) {
 811                                 p_err("failed to reallocate data_in/ctx_in: %s",
 812                                       strerror(errno));
 813                                 goto err_free;
 814                         }
 815                         *data_ptr = tmp;
 816                 }
 817         }
 818         if (f != stdin)
 819                 fclose(f);
 820
 821         *size = nb_read;
 822         return 0;
 823
 824 err_free:
 825         free(*data_ptr);
 826         *data_ptr = NULL;
 827 err_fclose:
 828         if (f != stdin)
 829                 fclose(f);
 830         return -1;
 831 }
 832
 833 static void hex_print(void *data, unsigned int size, FILE *f)
 834 {
 835         size_t i, j;
 836         char c;
 837
 838         for (i = 0; i < size; i += 16) {
 839                 /* Row offset */
 840                 fprintf(f, "%07zx\t", i);
 841
 842                 /* Hexadecimal values */
 843                 for (j = i; j < i + 16 && j < size; j++)
 844                         fprintf(f, "%02x%s", *(uint8_t *)(data + j),
 845                                 j % 2 ? " " : "");
 846                 for (; j < i + 16; j++)
 847                         fprintf(f, "  %s", j % 2 ? " " : "");
 848
 849                 /* ASCII values (if relevant), '.' otherwise */
 850                 fprintf(f, "| ");
 851                 for (j = i; j < i + 16 && j < size; j++) {
 852                         c = *(char *)(data + j);
 853                         if (c < ' ' || c > '~')
 854                                 c = '.';
 855                         fprintf(f, "%c%s", c, j == i + 7 ? " " : "");
 856                 }
 857
 858                 fprintf(f, "\n");
 859         }
 860 }
 861
 862 static int
 863 print_run_output(void *data, unsigned int size, const char *fname,
 864                  const char *json_key)
 865 {
 866         size_t nb_written;
 867         FILE *f;
 868
 869         if (!fname)
 870                 return 0;
 871
 872         if (!strcmp(fname, "-")) {
 873                 f = stdout;
 874                 if (json_output) {
 875                         jsonw_name(json_wtr, json_key);
 876                         print_data_json(data, size);
 877                 } else {
 878                         hex_print(data, size, f);
 879                 }
 880                 return 0;
 881         }
 882
 883         f = fopen(fname, "w");
 884         if (!f) {
 885                 p_err("failed to open %s: %s", fname, strerror(errno));
 886                 return -1;
 887         }
 888
 889         nb_written = fwrite(data, 1, size, f);
 890         fclose(f);
 891         if (nb_written != size) {
 892                 p_err("failed to write output data/ctx: %s", strerror(errno));
 893                 return -1;
 894         }
 895
 896         return 0;
 897 }
 898
 899 static int alloc_run_data(void **data_ptr, unsigned int size_out)
 900 {
 901         *data_ptr = calloc(size_out, 1);
 902         if (!*data_ptr) {
 903                 p_err("failed to allocate memory for output data/ctx: %s",
 904                       strerror(errno));
 905                 return -1;
 906         }
 907
 908         return 0;
 909 }
 910
 911 static int do_run(int argc, char **argv)
 912 {
 913         char *data_fname_in = NULL, *data_fname_out = NULL;
 914         char *ctx_fname_in = NULL, *ctx_fname_out = NULL;
 915         struct bpf_prog_test_run_attr test_attr = {0};
 916         const unsigned int default_size = SZ_32K;
 917         void *data_in = NULL, *data_out = NULL;
 918         void *ctx_in = NULL, *ctx_out = NULL;
 919         unsigned int repeat = 1;
 920         int fd, err;
 921
 922         if (!REQ_ARGS(4))
 923                 return -1;
 924
 925         fd = prog_parse_fd(&argc, &argv);
 926         if (fd < 0)
 927                 return -1;
 928
 929         while (argc) {
 930                 if (detect_common_prefix(*argv, "data_in", "data_out",
 931                                          "data_size_out", NULL))
 932                         return -1;
 933                 if (detect_common_prefix(*argv, "ctx_in", "ctx_out",
 934                                          "ctx_size_out", NULL))
 935                         return -1;
 936
 937                 if (is_prefix(*argv, "data_in")) {
 938                         NEXT_ARG();
 939                         if (!REQ_ARGS(1))
 940                                 return -1;
 941
 942                         data_fname_in = GET_ARG();
 943                         if (check_single_stdin(data_fname_in, ctx_fname_in))
 944                                 return -1;
 945                 } else if (is_prefix(*argv, "data_out")) {
 946                         NEXT_ARG();
 947                         if (!REQ_ARGS(1))
 948                                 return -1;
 949
 950                         data_fname_out = GET_ARG();
 951                 } else if (is_prefix(*argv, "data_size_out")) {
 952                         char *endptr;
 953
 954                         NEXT_ARG();
 955                         if (!REQ_ARGS(1))
 956                                 return -1;
 957
 958                         test_attr.data_size_out = strtoul(*argv, &endptr, 0);
 959                         if (*endptr) {
 960                                 p_err("can't parse %s as output data size",
 961                                       *argv);
 962                                 return -1;
 963                         }
 964                         NEXT_ARG();
 965                 } else if (is_prefix(*argv, "ctx_in")) {
 966                         NEXT_ARG();
 967                         if (!REQ_ARGS(1))
 968                                 return -1;
 969
 970                         ctx_fname_in = GET_ARG();
 971                         if (check_single_stdin(data_fname_in, ctx_fname_in))
 972                                 return -1;
 973                 } else if (is_prefix(*argv, "ctx_out")) {
 974                         NEXT_ARG();
 975                         if (!REQ_ARGS(1))
 976                                 return -1;
 977
 978                         ctx_fname_out = GET_ARG();
 979                 } else if (is_prefix(*argv, "ctx_size_out")) {
 980                         char *endptr;
 981
 982                         NEXT_ARG();
 983                         if (!REQ_ARGS(1))
 984                                 return -1;
 985
 986                         test_attr.ctx_size_out = strtoul(*argv, &endptr, 0);
 987                         if (*endptr) {
 988                                 p_err("can't parse %s as output context size",
 989                                       *argv);
 990                                 return -1;
 991                         }
 992                         NEXT_ARG();
 993                 } else if (is_prefix(*argv, "repeat")) {
 994                         char *endptr;
 995
 996                         NEXT_ARG();
 997                         if (!REQ_ARGS(1))
 998                                 return -1;
 999
1000                         repeat = strtoul(*argv, &endptr, 0);
1001                         if (*endptr) {
1002                                 p_err("can't parse %s as repeat number",
1003                                       *argv);
1004                                 return -1;
1005                         }
1006                         NEXT_ARG();
1007                 } else {
1008                         p_err("expected no more arguments, 'data_in', 'data_out', 'data_size_out', 'ctx_in', 'ctx_out', 'ctx_size_out' or 'repeat', got: '%s'?",
1009                               *argv);
1010                         return -1;
1011                 }
1012         }
1013
1014         err = get_run_data(data_fname_in, &data_in, &test_attr.data_size_in);
1015         if (err)
1016                 return -1;
1017
1018         if (data_in) {
1019                 if (!test_attr.data_size_out)
1020                         test_attr.data_size_out = default_size;
1021                 err = alloc_run_data(&data_out, test_attr.data_size_out);
1022                 if (err)
1023                         goto free_data_in;
1024         }
1025
1026         err = get_run_data(ctx_fname_in, &ctx_in, &test_attr.ctx_size_in);
1027         if (err)
1028                 goto free_data_out;
1029
1030         if (ctx_in) {
1031                 if (!test_attr.ctx_size_out)
1032                         test_attr.ctx_size_out = default_size;
1033                 err = alloc_run_data(&ctx_out, test_attr.ctx_size_out);
1034                 if (err)
1035                         goto free_ctx_in;
1036         }
1037
1038         test_attr.prog_fd       = fd;
1039         test_attr.repeat        = repeat;
1040         test_attr.data_in       = data_in;
1041         test_attr.data_out      = data_out;
1042         test_attr.ctx_in        = ctx_in;
1043         test_attr.ctx_out       = ctx_out;
1044
1045         err = bpf_prog_test_run_xattr(&test_attr);
1046         if (err) {
1047                 p_err("failed to run program: %s", strerror(errno));
1048                 goto free_ctx_out;
1049         }
1050
1051         err = 0;
1052
1053         if (json_output)
1054                 jsonw_start_object(json_wtr);   /* root */
1055
1056         /* Do not exit on errors occurring when printing output data/context,
1057          * we still want to print return value and duration for program run.
1058          */
1059         if (test_attr.data_size_out)
1060                 err += print_run_output(test_attr.data_out,
1061                                         test_attr.data_size_out,
1062                                         data_fname_out, "data_out");
1063         if (test_attr.ctx_size_out)
1064                 err += print_run_output(test_attr.ctx_out,
1065                                         test_attr.ctx_size_out,
1066                                         ctx_fname_out, "ctx_out");
1067
1068         if (json_output) {
1069                 jsonw_uint_field(json_wtr, "retval", test_attr.retval);
1070                 jsonw_uint_field(json_wtr, "duration", test_attr.duration);
1071                 jsonw_end_object(json_wtr);     /* root */
1072         } else {
1073                 fprintf(stdout, "Return value: %u, duration%s: %uns\n",
1074                         test_attr.retval,
1075                         repeat > 1 ? " (average)" : "", test_attr.duration);
1076         }
1077
1078 free_ctx_out:
1079         free(ctx_out);
1080 free_ctx_in:
1081         free(ctx_in);
1082 free_data_out:
1083         free(data_out);
1084 free_data_in:
1085         free(data_in);
1086
1087         return err;
1088 }
1089
1090 static int load_with_options(int argc, char **argv, bool first_prog_only)
1091 {
1092         struct bpf_object_load_attr load_attr = { 0 };
1093         struct bpf_object_open_attr open_attr = {
1094                 .prog_type = BPF_PROG_TYPE_UNSPEC,
1095         };
1096         enum bpf_attach_type expected_attach_type;
1097         struct map_replace *map_replace = NULL;
1098         struct bpf_program *prog = NULL, *pos;
1099         unsigned int old_map_fds = 0;
1100         const char *pinmaps = NULL;
1101         struct bpf_object *obj;
1102         struct bpf_map *map;
1103         const char *pinfile;
1104         unsigned int i, j;
1105         __u32 ifindex = 0;
1106         int idx, err;
1107
1108         if (!REQ_ARGS(2))
1109                 return -1;
1110         open_attr.file = GET_ARG();
1111         pinfile = GET_ARG();
1112
1113         while (argc) {
1114                 if (is_prefix(*argv, "type")) {
1115                         char *type;
1116
1117                         NEXT_ARG();
1118
1119                         if (open_attr.prog_type != BPF_PROG_TYPE_UNSPEC) {
1120                                 p_err("program type already specified");
1121                                 goto err_free_reuse_maps;
1122                         }
1123                         if (!REQ_ARGS(1))
1124                                 goto err_free_reuse_maps;
1125
1126                         /* Put a '/' at the end of type to appease libbpf */
1127                         type = malloc(strlen(*argv) + 2);
1128                         if (!type) {
1129                                 p_err("mem alloc failed");
1130                                 goto err_free_reuse_maps;
1131                         }
1132                         *type = 0;
1133                         strcat(type, *argv);
1134                         strcat(type, "/");
1135
1136                         err = libbpf_prog_type_by_name(type,
1137                                                        &open_attr.prog_type,
1138                                                        &expected_attach_type);
1139                         free(type);
1140                         if (err < 0)
1141                                 goto err_free_reuse_maps;
1142
1143                         NEXT_ARG();
1144                 } else if (is_prefix(*argv, "map")) {
1145                         void *new_map_replace;
1146                         char *endptr, *name;
1147                         int fd;
1148
1149                         NEXT_ARG();
1150
1151                         if (!REQ_ARGS(4))
1152                                 goto err_free_reuse_maps;
1153
1154                         if (is_prefix(*argv, "idx")) {
1155                                 NEXT_ARG();
1156
1157                                 idx = strtoul(*argv, &endptr, 0);
1158                                 if (*endptr) {
1159                                         p_err("can't parse %s as IDX", *argv);
1160                                         goto err_free_reuse_maps;
1161                                 }
1162                                 name = NULL;
1163                         } else if (is_prefix(*argv, "name")) {
1164                                 NEXT_ARG();
1165
1166                                 name = *argv;
1167                                 idx = -1;
1168                         } else {
1169                                 p_err("expected 'idx' or 'name', got: '%s'?",
1170                                       *argv);
1171                                 goto err_free_reuse_maps;
1172                         }
1173                         NEXT_ARG();
1174
1175                         fd = map_parse_fd(&argc, &argv);
1176                         if (fd < 0)
1177                                 goto err_free_reuse_maps;
1178
1179                         new_map_replace = reallocarray(map_replace,
1180                                                        old_map_fds + 1,
1181                                                        sizeof(*map_replace));
1182                         if (!new_map_replace) {
1183                                 p_err("mem alloc failed");
1184                                 goto err_free_reuse_maps;
1185                         }
1186                         map_replace = new_map_replace;
1187
1188                         map_replace[old_map_fds].idx = idx;
1189                         map_replace[old_map_fds].name = name;
1190                         map_replace[old_map_fds].fd = fd;
1191                         old_map_fds++;
1192                 } else if (is_prefix(*argv, "dev")) {
1193                         NEXT_ARG();
1194
1195                         if (ifindex) {
1196                                 p_err("offload device already specified");
1197                                 goto err_free_reuse_maps;
1198                         }
1199                         if (!REQ_ARGS(1))
1200                                 goto err_free_reuse_maps;
1201
1202                         ifindex = if_nametoindex(*argv);
1203                         if (!ifindex) {
1204                                 p_err("unrecognized netdevice '%s': %s",
1205                                       *argv, strerror(errno));
1206                                 goto err_free_reuse_maps;
1207                         }
1208                         NEXT_ARG();
1209                 } else if (is_prefix(*argv, "pinmaps")) {
1210                         NEXT_ARG();
1211
1212                         if (!REQ_ARGS(1))
1213                                 goto err_free_reuse_maps;
1214
1215                         pinmaps = GET_ARG();
1216                 } else {
1217                         p_err("expected no more arguments, 'type', 'map' or 'dev', got: '%s'?",
1218                               *argv);
1219                         goto err_free_reuse_maps;
1220                 }
1221         }
1222
1223         set_max_rlimit();
1224
1225         obj = __bpf_object__open_xattr(&open_attr, bpf_flags);
1226         if (IS_ERR_OR_NULL(obj)) {
1227                 p_err("failed to open object file");
1228                 goto err_free_reuse_maps;
1229         }
1230
1231         bpf_object__for_each_program(pos, obj) {
1232                 enum bpf_prog_type prog_type = open_attr.prog_type;
1233
1234                 if (open_attr.prog_type == BPF_PROG_TYPE_UNSPEC) {
1235                         const char *sec_name = bpf_program__title(pos, false);
1236
1237                         err = libbpf_prog_type_by_name(sec_name, &prog_type,
1238                                                        &expected_attach_type);
1239                         if (err < 0)
1240                                 goto err_close_obj;
1241                 }
1242
1243                 bpf_program__set_ifindex(pos, ifindex);
1244                 bpf_program__set_type(pos, prog_type);
1245                 bpf_program__set_expected_attach_type(pos, expected_attach_type);
1246         }
1247
1248         qsort(map_replace, old_map_fds, sizeof(*map_replace),
1249               map_replace_compar);
1250
1251         /* After the sort maps by name will be first on the list, because they
1252          * have idx == -1.  Resolve them.
1253          */
1254         j = 0;
1255         while (j < old_map_fds && map_replace[j].name) {
1256                 i = 0;
1257                 bpf_object__for_each_map(map, obj) {
1258                         if (!strcmp(bpf_map__name(map), map_replace[j].name)) {
1259                                 map_replace[j].idx = i;
1260                                 break;
1261                         }
1262                         i++;
1263                 }
1264                 if (map_replace[j].idx == -1) {
1265                         p_err("unable to find map '%s'", map_replace[j].name);
1266                         goto err_close_obj;
1267                 }
1268                 j++;
1269         }
1270         /* Resort if any names were resolved */
1271         if (j)
1272                 qsort(map_replace, old_map_fds, sizeof(*map_replace),
1273                       map_replace_compar);
1274
1275         /* Set ifindex and name reuse */
1276         j = 0;
1277         idx = 0;
1278         bpf_object__for_each_map(map, obj) {
1279                 if (!bpf_map__is_offload_neutral(map))
1280                         bpf_map__set_ifindex(map, ifindex);
1281
1282                 if (j < old_map_fds && idx == map_replace[j].idx) {
1283                         err = bpf_map__reuse_fd(map, map_replace[j++].fd);
1284                         if (err) {
1285                                 p_err("unable to set up map reuse: %d", err);
1286                                 goto err_close_obj;
1287                         }
1288
1289                         /* Next reuse wants to apply to the same map */
1290                         if (j < old_map_fds && map_replace[j].idx == idx) {
1291                                 p_err("replacement for map idx %d specified more than once",
1292                                       idx);
1293                                 goto err_close_obj;
1294                         }
1295                 }
1296
1297                 idx++;
1298         }
1299         if (j < old_map_fds) {
1300                 p_err("map idx '%d' not used", map_replace[j].idx);
1301                 goto err_close_obj;
1302         }
1303
1304         load_attr.obj = obj;
1305         if (verifier_logs)
1306                 /* log_level1 + log_level2 + stats, but not stable UAPI */
1307                 load_attr.log_level = 1 + 2 + 4;
1308
1309         err = bpf_object__load_xattr(&load_attr);
1310         if (err) {
1311                 p_err("failed to load object file");
1312                 goto err_close_obj;
1313         }
1314
1315         err = mount_bpffs_for_pin(pinfile);
1316         if (err)
1317                 goto err_close_obj;
1318
1319         if (first_prog_only) {
1320                 prog = bpf_program__next(NULL, obj);
1321                 if (!prog) {
1322                         p_err("object file doesn't contain any bpf program");
1323                         goto err_close_obj;
1324                 }
1325
1326                 err = bpf_obj_pin(bpf_program__fd(prog), pinfile);
1327                 if (err) {
1328                         p_err("failed to pin program %s",
1329                               bpf_program__title(prog, false));
1330                         goto err_close_obj;
1331                 }
1332         } else {
1333                 err = bpf_object__pin_programs(obj, pinfile);
1334                 if (err) {
1335                         p_err("failed to pin all programs");
1336                         goto err_close_obj;
1337                 }
1338         }
1339
1340         if (pinmaps) {
1341                 err = bpf_object__pin_maps(obj, pinmaps);
1342                 if (err) {
1343                         p_err("failed to pin all maps");
1344                         goto err_unpin;
1345                 }
1346         }
1347
1348         if (json_output)
1349                 jsonw_null(json_wtr);
1350
1351         bpf_object__close(obj);
1352         for (i = 0; i < old_map_fds; i++)
1353                 close(map_replace[i].fd);
1354         free(map_replace);
1355
1356         return 0;
1357
1358 err_unpin:
1359         if (first_prog_only)
1360                 unlink(pinfile);
1361         else
1362                 bpf_object__unpin_programs(obj, pinfile);
1363 err_close_obj:
1364         bpf_object__close(obj);
1365 err_free_reuse_maps:
1366         for (i = 0; i < old_map_fds; i++)
1367                 close(map_replace[i].fd);
1368         free(map_replace);
1369         return -1;
1370 }
1371
1372 static int do_load(int argc, char **argv)
1373 {
1374         return load_with_options(argc, argv, true);
1375 }
1376
1377 static int do_loadall(int argc, char **argv)
1378 {
1379         return load_with_options(argc, argv, false);
1380 }
1381
1382 static int do_help(int argc, char **argv)
1383 {
1384         if (json_output) {
1385                 jsonw_null(json_wtr);
1386                 return 0;
1387         }
1388
1389         fprintf(stderr,
1390                 "Usage: %s %s { show | list } [PROG]\n"
1391                 "       %s %s dump xlated PROG [{ file FILE | opcodes | visual | linum }]\n"
1392                 "       %s %s dump jited  PROG [{ file FILE | opcodes | linum }]\n"
1393                 "       %s %s pin   PROG FILE\n"
1394                 "       %s %s { load | loadall } OBJ  PATH \\\n"
1395                 "                         [type TYPE] [dev NAME] \\\n"
1396                 "                         [map { idx IDX | name NAME } MAP]\\\n"
1397                 "                         [pinmaps MAP_DIR]\n"
1398                 "       %s %s attach PROG ATTACH_TYPE [MAP]\n"
1399                 "       %s %s detach PROG ATTACH_TYPE [MAP]\n"
1400                 "       %s %s run PROG \\\n"
1401                 "                         data_in FILE \\\n"
1402                 "                         [data_out FILE [data_size_out L]] \\\n"
1403                 "                         [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n"
1404                 "                         [repeat N]\n"
1405                 "       %s %s tracelog\n"
1406                 "       %s %s help\n"
1407                 "\n"
1408                 "       " HELP_SPEC_MAP "\n"
1409                 "       " HELP_SPEC_PROGRAM "\n"
1410                 "       TYPE := { socket | kprobe | kretprobe | classifier | action |\n"
1411                 "                 tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n"
1412                 "                 cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n"
1413                 "                 lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n"
1414                 "                 sk_reuseport | flow_dissector | cgroup/sysctl |\n"
1415                 "                 cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"
1416                 "                 cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"
1417                 "                 cgroup/sendmsg4 | cgroup/sendmsg6 | cgroup/recvmsg4 |\n"
1418                 "                 cgroup/recvmsg6 | cgroup/getsockopt |\n"
1419                 "                 cgroup/setsockopt }\n"
1420                 "       ATTACH_TYPE := { msg_verdict | stream_verdict | stream_parser |\n"
1421                 "                        flow_dissector }\n"
1422                 "       " HELP_SPEC_OPTIONS "\n"
1423                 "",
1424                 bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
1425                 bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
1426                 bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
1427                 bin_name, argv[-2]);
1428
1429         return 0;
1430 }
1431
1432 static const struct cmd cmds[] = {
1433         { "show",       do_show },
1434         { "list",       do_show },
1435         { "help",       do_help },
1436         { "dump",       do_dump },
1437         { "pin",        do_pin },
1438         { "load",       do_load },
1439         { "loadall",    do_loadall },
1440         { "attach",     do_attach },
1441         { "detach",     do_detach },
1442         { "tracelog",   do_tracelog },
1443         { "run",        do_run },
1444         { 0 }
1445 };
1446
1447 int do_prog(int argc, char **argv)
1448 {
1449         return cmd_select(cmds, argc, argv, do_help);
1450 }