tools/bpf/bpftool/prog.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
   3
   4 #define _GNU_SOURCE
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <signal.h>
   8 #include <stdarg.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <time.h>
  13 #include <unistd.h>
  14 #include <net/if.h>
  15 #include <sys/ioctl.h>
  16 #include <sys/types.h>
  17 #include <sys/stat.h>
  18 #include <sys/syscall.h>
  19 #include <dirent.h>
  20
  21 #include <linux/err.h>
  22 #include <linux/perf_event.h>
  23 #include <linux/sizes.h>
  24
  25 #include <bpf/bpf.h>
  26 #include <bpf/btf.h>
  27 #include <bpf/libbpf.h>
  28 #include <bpf/bpf_gen_internal.h>
  29 #include <bpf/skel_internal.h>
  30
  31 #include "cfg.h"
  32 #include "main.h"
  33 #include "xlated_dumper.h"
  34
  35 #define BPF_METADATA_PREFIX "bpf_metadata_"
  36 #define BPF_METADATA_PREFIX_LEN (sizeof(BPF_METADATA_PREFIX) - 1)
  37
  38 const char * const prog_type_name[] = {
  39         [BPF_PROG_TYPE_UNSPEC]                  = "unspec",
  40         [BPF_PROG_TYPE_SOCKET_FILTER]           = "socket_filter",
  41         [BPF_PROG_TYPE_KPROBE]                  = "kprobe",
  42         [BPF_PROG_TYPE_SCHED_CLS]               = "sched_cls",
  43         [BPF_PROG_TYPE_SCHED_ACT]               = "sched_act",
  44         [BPF_PROG_TYPE_TRACEPOINT]              = "tracepoint",
  45         [BPF_PROG_TYPE_XDP]                     = "xdp",
  46         [BPF_PROG_TYPE_PERF_EVENT]              = "perf_event",
  47         [BPF_PROG_TYPE_CGROUP_SKB]              = "cgroup_skb",
  48         [BPF_PROG_TYPE_CGROUP_SOCK]             = "cgroup_sock",
  49         [BPF_PROG_TYPE_LWT_IN]                  = "lwt_in",
  50         [BPF_PROG_TYPE_LWT_OUT]                 = "lwt_out",
  51         [BPF_PROG_TYPE_LWT_XMIT]                = "lwt_xmit",
  52         [BPF_PROG_TYPE_SOCK_OPS]                = "sock_ops",
  53         [BPF_PROG_TYPE_SK_SKB]                  = "sk_skb",
  54         [BPF_PROG_TYPE_CGROUP_DEVICE]           = "cgroup_device",
  55         [BPF_PROG_TYPE_SK_MSG]                  = "sk_msg",
  56         [BPF_PROG_TYPE_RAW_TRACEPOINT]          = "raw_tracepoint",
  57         [BPF_PROG_TYPE_CGROUP_SOCK_ADDR]        = "cgroup_sock_addr",
  58         [BPF_PROG_TYPE_LWT_SEG6LOCAL]           = "lwt_seg6local",
  59         [BPF_PROG_TYPE_LIRC_MODE2]              = "lirc_mode2",
  60         [BPF_PROG_TYPE_SK_REUSEPORT]            = "sk_reuseport",
  61         [BPF_PROG_TYPE_FLOW_DISSECTOR]          = "flow_dissector",
  62         [BPF_PROG_TYPE_CGROUP_SYSCTL]           = "cgroup_sysctl",
  63         [BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE] = "raw_tracepoint_writable",
  64         [BPF_PROG_TYPE_CGROUP_SOCKOPT]          = "cgroup_sockopt",
  65         [BPF_PROG_TYPE_TRACING]                 = "tracing",
  66         [BPF_PROG_TYPE_STRUCT_OPS]              = "struct_ops",
  67         [BPF_PROG_TYPE_EXT]                     = "ext",
  68         [BPF_PROG_TYPE_LSM]                     = "lsm",
  69         [BPF_PROG_TYPE_SK_LOOKUP]               = "sk_lookup",
  70 };
  71
  72 const size_t prog_type_name_size = ARRAY_SIZE(prog_type_name);
  73
  74 enum dump_mode {
  75         DUMP_JITED,
  76         DUMP_XLATED,
  77 };
  78
  79 static const char * const attach_type_strings[] = {
  80         [BPF_SK_SKB_STREAM_PARSER] = "stream_parser",
  81         [BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict",
  82         [BPF_SK_SKB_VERDICT] = "skb_verdict",
  83         [BPF_SK_MSG_VERDICT] = "msg_verdict",
  84         [BPF_FLOW_DISSECTOR] = "flow_dissector",
  85         [__MAX_BPF_ATTACH_TYPE] = NULL,
  86 };
  87
  88 static enum bpf_attach_type parse_attach_type(const char *str)
  89 {
  90         enum bpf_attach_type type;
  91
  92         for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) {
  93                 if (attach_type_strings[type] &&
  94                     is_prefix(str, attach_type_strings[type]))
  95                         return type;
  96         }
  97
  98         return __MAX_BPF_ATTACH_TYPE;
  99 }
 100
 101 static void print_boot_time(__u64 nsecs, char *buf, unsigned int size)
 102 {
 103         struct timespec real_time_ts, boot_time_ts;
 104         time_t wallclock_secs;
 105         struct tm load_tm;
 106
 107         buf[--size] = '\0';
 108
 109         if (clock_gettime(CLOCK_REALTIME, &real_time_ts) ||
 110             clock_gettime(CLOCK_BOOTTIME, &boot_time_ts)) {
 111                 perror("Can't read clocks");
 112                 snprintf(buf, size, "%llu", nsecs / 1000000000);
 113                 return;
 114         }
 115
 116         wallclock_secs = (real_time_ts.tv_sec - boot_time_ts.tv_sec) +
 117                 (real_time_ts.tv_nsec - boot_time_ts.tv_nsec + nsecs) /
 118                 1000000000;
 119
 120
 121         if (!localtime_r(&wallclock_secs, &load_tm)) {
 122                 snprintf(buf, size, "%llu", nsecs / 1000000000);
 123                 return;
 124         }
 125
 126         if (json_output)
 127                 strftime(buf, size, "%s", &load_tm);
 128         else
 129                 strftime(buf, size, "%FT%T%z", &load_tm);
 130 }
 131
 132 static void show_prog_maps(int fd, __u32 num_maps)
 133 {
 134         struct bpf_prog_info info = {};
 135         __u32 len = sizeof(info);
 136         __u32 map_ids[num_maps];
 137         unsigned int i;
 138         int err;
 139
 140         info.nr_map_ids = num_maps;
 141         info.map_ids = ptr_to_u64(map_ids);
 142
 143         err = bpf_obj_get_info_by_fd(fd, &info, &len);
 144         if (err || !info.nr_map_ids)
 145                 return;
 146
 147         if (json_output) {
 148                 jsonw_name(json_wtr, "map_ids");
 149                 jsonw_start_array(json_wtr);
 150                 for (i = 0; i < info.nr_map_ids; i++)
 151                         jsonw_uint(json_wtr, map_ids[i]);
 152                 jsonw_end_array(json_wtr);
 153         } else {
 154                 printf("  map_ids ");
 155                 for (i = 0; i < info.nr_map_ids; i++)
 156                         printf("%u%s", map_ids[i],
 157                                i == info.nr_map_ids - 1 ? "" : ",");
 158         }
 159 }
 160
 161 static void *find_metadata(int prog_fd, struct bpf_map_info *map_info)
 162 {
 163         struct bpf_prog_info prog_info;
 164         __u32 prog_info_len;
 165         __u32 map_info_len;
 166         void *value = NULL;
 167         __u32 *map_ids;
 168         int nr_maps;
 169         int key = 0;
 170         int map_fd;
 171         int ret;
 172         __u32 i;
 173
 174         memset(&prog_info, 0, sizeof(prog_info));
 175         prog_info_len = sizeof(prog_info);
 176         ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
 177         if (ret)
 178                 return NULL;
 179
 180         if (!prog_info.nr_map_ids)
 181                 return NULL;
 182
 183         map_ids = calloc(prog_info.nr_map_ids, sizeof(__u32));
 184         if (!map_ids)
 185                 return NULL;
 186
 187         nr_maps = prog_info.nr_map_ids;
 188         memset(&prog_info, 0, sizeof(prog_info));
 189         prog_info.nr_map_ids = nr_maps;
 190         prog_info.map_ids = ptr_to_u64(map_ids);
 191         prog_info_len = sizeof(prog_info);
 192
 193         ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
 194         if (ret)
 195                 goto free_map_ids;
 196
 197         for (i = 0; i < prog_info.nr_map_ids; i++) {
 198                 map_fd = bpf_map_get_fd_by_id(map_ids[i]);
 199                 if (map_fd < 0)
 200                         goto free_map_ids;
 201
 202                 memset(map_info, 0, sizeof(*map_info));
 203                 map_info_len = sizeof(*map_info);
 204                 ret = bpf_obj_get_info_by_fd(map_fd, map_info, &map_info_len);
 205                 if (ret < 0) {
 206                         close(map_fd);
 207                         goto free_map_ids;
 208                 }
 209
 210                 if (map_info->type != BPF_MAP_TYPE_ARRAY ||
 211                     map_info->key_size != sizeof(int) ||
 212                     map_info->max_entries != 1 ||
 213                     !map_info->btf_value_type_id ||
 214                     !strstr(map_info->name, ".rodata")) {
 215                         close(map_fd);
 216                         continue;
 217                 }
 218
 219                 value = malloc(map_info->value_size);
 220                 if (!value) {
 221                         close(map_fd);
 222                         goto free_map_ids;
 223                 }
 224
 225                 if (bpf_map_lookup_elem(map_fd, &key, value)) {
 226                         close(map_fd);
 227                         free(value);
 228                         value = NULL;
 229                         goto free_map_ids;
 230                 }
 231
 232                 close(map_fd);
 233                 break;
 234         }
 235
 236 free_map_ids:
 237         free(map_ids);
 238         return value;
 239 }
 240
 241 static bool has_metadata_prefix(const char *s)
 242 {
 243         return strncmp(s, BPF_METADATA_PREFIX, BPF_METADATA_PREFIX_LEN) == 0;
 244 }
 245
 246 static void show_prog_metadata(int fd, __u32 num_maps)
 247 {
 248         const struct btf_type *t_datasec, *t_var;
 249         struct bpf_map_info map_info;
 250         struct btf_var_secinfo *vsi;
 251         bool printed_header = false;
 252         unsigned int i, vlen;
 253         void *value = NULL;
 254         const char *name;
 255         struct btf *btf;
 256         int err;
 257
 258         if (!num_maps)
 259                 return;
 260
 261         memset(&map_info, 0, sizeof(map_info));
 262         value = find_metadata(fd, &map_info);
 263         if (!value)
 264                 return;
 265
 266         btf = btf__load_from_kernel_by_id(map_info.btf_id);
 267         if (libbpf_get_error(btf))
 268                 goto out_free;
 269
 270         t_datasec = btf__type_by_id(btf, map_info.btf_value_type_id);
 271         if (!btf_is_datasec(t_datasec))
 272                 goto out_free;
 273
 274         vlen = btf_vlen(t_datasec);
 275         vsi = btf_var_secinfos(t_datasec);
 276
 277         /* We don't proceed to check the kinds of the elements of the DATASEC.
 278          * The verifier enforces them to be BTF_KIND_VAR.
 279          */
 280
 281         if (json_output) {
 282                 struct btf_dumper d = {
 283                         .btf = btf,
 284                         .jw = json_wtr,
 285                         .is_plain_text = false,
 286                 };
 287
 288                 for (i = 0; i < vlen; i++, vsi++) {
 289                         t_var = btf__type_by_id(btf, vsi->type);
 290                         name = btf__name_by_offset(btf, t_var->name_off);
 291
 292                         if (!has_metadata_prefix(name))
 293                                 continue;
 294
 295                         if (!printed_header) {
 296                                 jsonw_name(json_wtr, "metadata");
 297                                 jsonw_start_object(json_wtr);
 298                                 printed_header = true;
 299                         }
 300
 301                         jsonw_name(json_wtr, name + BPF_METADATA_PREFIX_LEN);
 302                         err = btf_dumper_type(&d, t_var->type, value + vsi->offset);
 303                         if (err) {
 304                                 p_err("btf dump failed: %d", err);
 305                                 break;
 306                         }
 307                 }
 308                 if (printed_header)
 309                         jsonw_end_object(json_wtr);
 310         } else {
 311                 json_writer_t *btf_wtr;
 312                 struct btf_dumper d = {
 313                         .btf = btf,
 314                         .is_plain_text = true,
 315                 };
 316
 317                 for (i = 0; i < vlen; i++, vsi++) {
 318                         t_var = btf__type_by_id(btf, vsi->type);
 319                         name = btf__name_by_offset(btf, t_var->name_off);
 320
 321                         if (!has_metadata_prefix(name))
 322                                 continue;
 323
 324                         if (!printed_header) {
 325                                 printf("\tmetadata:");
 326
 327                                 btf_wtr = jsonw_new(stdout);
 328                                 if (!btf_wtr) {
 329                                         p_err("jsonw alloc failed");
 330                                         goto out_free;
 331                                 }
 332                                 d.jw = btf_wtr,
 333
 334                                 printed_header = true;
 335                         }
 336
 337                         printf("\n\t\t%s = ", name + BPF_METADATA_PREFIX_LEN);
 338
 339                         jsonw_reset(btf_wtr);
 340                         err = btf_dumper_type(&d, t_var->type, value + vsi->offset);
 341                         if (err) {
 342                                 p_err("btf dump failed: %d", err);
 343                                 break;
 344                         }
 345                 }
 346                 if (printed_header)
 347                         jsonw_destroy(&btf_wtr);
 348         }
 349
 350 out_free:
 351         btf__free(btf);
 352         free(value);
 353 }
 354
 355 static void print_prog_header_json(struct bpf_prog_info *info)
 356 {
 357         jsonw_uint_field(json_wtr, "id", info->id);
 358         if (info->type < ARRAY_SIZE(prog_type_name))
 359                 jsonw_string_field(json_wtr, "type",
 360                                    prog_type_name[info->type]);
 361         else
 362                 jsonw_uint_field(json_wtr, "type", info->type);
 363
 364         if (*info->name)
 365                 jsonw_string_field(json_wtr, "name", info->name);
 366
 367         jsonw_name(json_wtr, "tag");
 368         jsonw_printf(json_wtr, "\"" BPF_TAG_FMT "\"",
 369                      info->tag[0], info->tag[1], info->tag[2], info->tag[3],
 370                      info->tag[4], info->tag[5], info->tag[6], info->tag[7]);
 371
 372         jsonw_bool_field(json_wtr, "gpl_compatible", info->gpl_compatible);
 373         if (info->run_time_ns) {
 374                 jsonw_uint_field(json_wtr, "run_time_ns", info->run_time_ns);
 375                 jsonw_uint_field(json_wtr, "run_cnt", info->run_cnt);
 376         }
 377         if (info->recursion_misses)
 378                 jsonw_uint_field(json_wtr, "recursion_misses", info->recursion_misses);
 379 }
 380
 381 static void print_prog_json(struct bpf_prog_info *info, int fd)
 382 {
 383         char *memlock;
 384
 385         jsonw_start_object(json_wtr);
 386         print_prog_header_json(info);
 387         print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);
 388
 389         if (info->load_time) {
 390                 char buf[32];
 391
 392                 print_boot_time(info->load_time, buf, sizeof(buf));
 393
 394                 /* Piggy back on load_time, since 0 uid is a valid one */
 395                 jsonw_name(json_wtr, "loaded_at");
 396                 jsonw_printf(json_wtr, "%s", buf);
 397                 jsonw_uint_field(json_wtr, "uid", info->created_by_uid);
 398         }
 399
 400         jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len);
 401
 402         if (info->jited_prog_len) {
 403                 jsonw_bool_field(json_wtr, "jited", true);
 404                 jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len);
 405         } else {
 406                 jsonw_bool_field(json_wtr, "jited", false);
 407         }
 408
 409         memlock = get_fdinfo(fd, "memlock");
 410         if (memlock)
 411                 jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
 412         free(memlock);
 413
 414         if (info->nr_map_ids)
 415                 show_prog_maps(fd, info->nr_map_ids);
 416
 417         if (info->btf_id)
 418                 jsonw_int_field(json_wtr, "btf_id", info->btf_id);
 419
 420         if (!hash_empty(prog_table.table)) {
 421                 struct pinned_obj *obj;
 422
 423                 jsonw_name(json_wtr, "pinned");
 424                 jsonw_start_array(json_wtr);
 425                 hash_for_each_possible(prog_table.table, obj, hash, info->id) {
 426                         if (obj->id == info->id)
 427                                 jsonw_string(json_wtr, obj->path);
 428                 }
 429                 jsonw_end_array(json_wtr);
 430         }
 431
 432         emit_obj_refs_json(&refs_table, info->id, json_wtr);
 433
 434         show_prog_metadata(fd, info->nr_map_ids);
 435
 436         jsonw_end_object(json_wtr);
 437 }
 438
 439 static void print_prog_header_plain(struct bpf_prog_info *info)
 440 {
 441         printf("%u: ", info->id);
 442         if (info->type < ARRAY_SIZE(prog_type_name))
 443                 printf("%s  ", prog_type_name[info->type]);
 444         else
 445                 printf("type %u  ", info->type);
 446
 447         if (*info->name)
 448                 printf("name %s  ", info->name);
 449
 450         printf("tag ");
 451         fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");
 452         print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
 453         printf("%s", info->gpl_compatible ? "  gpl" : "");
 454         if (info->run_time_ns)
 455                 printf(" run_time_ns %lld run_cnt %lld",
 456                        info->run_time_ns, info->run_cnt);
 457         if (info->recursion_misses)
 458                 printf(" recursion_misses %lld", info->recursion_misses);
 459         printf("\n");
 460 }
 461
 462 static void print_prog_plain(struct bpf_prog_info *info, int fd)
 463 {
 464         char *memlock;
 465
 466         print_prog_header_plain(info);
 467
 468         if (info->load_time) {
 469                 char buf[32];
 470
 471                 print_boot_time(info->load_time, buf, sizeof(buf));
 472
 473                 /* Piggy back on load_time, since 0 uid is a valid one */
 474                 printf("\tloaded_at %s  uid %u\n", buf, info->created_by_uid);
 475         }
 476
 477         printf("\txlated %uB", info->xlated_prog_len);
 478
 479         if (info->jited_prog_len)
 480                 printf("  jited %uB", info->jited_prog_len);
 481         else
 482                 printf("  not jited");
 483
 484         memlock = get_fdinfo(fd, "memlock");
 485         if (memlock)
 486                 printf("  memlock %sB", memlock);
 487         free(memlock);
 488
 489         if (info->nr_map_ids)
 490                 show_prog_maps(fd, info->nr_map_ids);
 491
 492         if (!hash_empty(prog_table.table)) {
 493                 struct pinned_obj *obj;
 494
 495                 hash_for_each_possible(prog_table.table, obj, hash, info->id) {
 496                         if (obj->id == info->id)
 497                                 printf("\n\tpinned %s", obj->path);
 498                 }
 499         }
 500
 501         if (info->btf_id)
 502                 printf("\n\tbtf_id %d", info->btf_id);
 503
 504         emit_obj_refs_plain(&refs_table, info->id, "\n\tpids ");
 505
 506         printf("\n");
 507
 508         show_prog_metadata(fd, info->nr_map_ids);
 509 }
 510
 511 static int show_prog(int fd)
 512 {
 513         struct bpf_prog_info info = {};
 514         __u32 len = sizeof(info);
 515         int err;
 516
 517         err = bpf_obj_get_info_by_fd(fd, &info, &len);
 518         if (err) {
 519                 p_err("can't get prog info: %s", strerror(errno));
 520                 return -1;
 521         }
 522
 523         if (json_output)
 524                 print_prog_json(&info, fd);
 525         else
 526                 print_prog_plain(&info, fd);
 527
 528         return 0;
 529 }
 530
 531 static int do_show_subset(int argc, char **argv)
 532 {
 533         int *fds = NULL;
 534         int nb_fds, i;
 535         int err = -1;
 536
 537         fds = malloc(sizeof(int));
 538         if (!fds) {
 539                 p_err("mem alloc failed");
 540                 return -1;
 541         }
 542         nb_fds = prog_parse_fds(&argc, &argv, &fds);
 543         if (nb_fds < 1)
 544                 goto exit_free;
 545
 546         if (json_output && nb_fds > 1)
 547                 jsonw_start_array(json_wtr);    /* root array */
 548         for (i = 0; i < nb_fds; i++) {
 549                 err = show_prog(fds[i]);
 550                 if (err) {
 551                         for (; i < nb_fds; i++)
 552                                 close(fds[i]);
 553                         break;
 554                 }
 555                 close(fds[i]);
 556         }
 557         if (json_output && nb_fds > 1)
 558                 jsonw_end_array(json_wtr);      /* root array */
 559
 560 exit_free:
 561         free(fds);
 562         return err;
 563 }
 564
 565 static int do_show(int argc, char **argv)
 566 {
 567         __u32 id = 0;
 568         int err;
 569         int fd;
 570
 571         if (show_pinned)
 572                 build_pinned_obj_table(&prog_table, BPF_OBJ_PROG);
 573         build_obj_refs_table(&refs_table, BPF_OBJ_PROG);
 574
 575         if (argc == 2)
 576                 return do_show_subset(argc, argv);
 577
 578         if (argc)
 579                 return BAD_ARG();
 580
 581         if (json_output)
 582                 jsonw_start_array(json_wtr);
 583         while (true) {
 584                 err = bpf_prog_get_next_id(id, &id);
 585                 if (err) {
 586                         if (errno == ENOENT) {
 587                                 err = 0;
 588                                 break;
 589                         }
 590                         p_err("can't get next program: %s%s", strerror(errno),
 591                               errno == EINVAL ? " -- kernel too old?" : "");
 592                         err = -1;
 593                         break;
 594                 }
 595
 596                 fd = bpf_prog_get_fd_by_id(id);
 597                 if (fd < 0) {
 598                         if (errno == ENOENT)
 599                                 continue;
 600                         p_err("can't get prog by id (%u): %s",
 601                               id, strerror(errno));
 602                         err = -1;
 603                         break;
 604                 }
 605
 606                 err = show_prog(fd);
 607                 close(fd);
 608                 if (err)
 609                         break;
 610         }
 611
 612         if (json_output)
 613                 jsonw_end_array(json_wtr);
 614
 615         delete_obj_refs_table(&refs_table);
 616
 617         return err;
 618 }
 619
 620 static int
 621 prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
 622           char *filepath, bool opcodes, bool visual, bool linum)
 623 {
 624         struct bpf_prog_linfo *prog_linfo = NULL;
 625         const char *disasm_opt = NULL;
 626         struct dump_data dd = {};
 627         void *func_info = NULL;
 628         struct btf *btf = NULL;
 629         char func_sig[1024];
 630         unsigned char *buf;
 631         __u32 member_len;
 632         int fd, err = -1;
 633         ssize_t n;
 634
 635         if (mode == DUMP_JITED) {
 636                 if (info->jited_prog_len == 0 || !info->jited_prog_insns) {
 637                         p_info("no instructions returned");
 638                         return -1;
 639                 }
 640                 buf = u64_to_ptr(info->jited_prog_insns);
 641                 member_len = info->jited_prog_len;
 642         } else {        /* DUMP_XLATED */
 643                 if (info->xlated_prog_len == 0 || !info->xlated_prog_insns) {
 644                         p_err("error retrieving insn dump: kernel.kptr_restrict set?");
 645                         return -1;
 646                 }
 647                 buf = u64_to_ptr(info->xlated_prog_insns);
 648                 member_len = info->xlated_prog_len;
 649         }
 650
 651         if (info->btf_id) {
 652                 btf = btf__load_from_kernel_by_id(info->btf_id);
 653                 if (libbpf_get_error(btf)) {
 654                         p_err("failed to get btf");
 655                         return -1;
 656                 }
 657         }
 658
 659         func_info = u64_to_ptr(info->func_info);
 660
 661         if (info->nr_line_info) {
 662                 prog_linfo = bpf_prog_linfo__new(info);
 663                 if (!prog_linfo)
 664                         p_info("error in processing bpf_line_info.  continue without it.");
 665         }
 666
 667         if (filepath) {
 668                 fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
 669                 if (fd < 0) {
 670                         p_err("can't open file %s: %s", filepath,
 671                               strerror(errno));
 672                         goto exit_free;
 673                 }
 674
 675                 n = write(fd, buf, member_len);
 676                 close(fd);
 677                 if (n != (ssize_t)member_len) {
 678                         p_err("error writing output file: %s",
 679                               n < 0 ? strerror(errno) : "short write");
 680                         goto exit_free;
 681                 }
 682
 683                 if (json_output)
 684                         jsonw_null(json_wtr);
 685         } else if (mode == DUMP_JITED) {
 686                 const char *name = NULL;
 687
 688                 if (info->ifindex) {
 689                         name = ifindex_to_bfd_params(info->ifindex,
 690                                                      info->netns_dev,
 691                                                      info->netns_ino,
 692                                                      &disasm_opt);
 693                         if (!name)
 694                                 goto exit_free;
 695                 }
 696
 697                 if (info->nr_jited_func_lens && info->jited_func_lens) {
 698                         struct kernel_sym *sym = NULL;
 699                         struct bpf_func_info *record;
 700                         char sym_name[SYM_MAX_NAME];
 701                         unsigned char *img = buf;
 702                         __u64 *ksyms = NULL;
 703                         __u32 *lens;
 704                         __u32 i;
 705                         if (info->nr_jited_ksyms) {
 706                                 kernel_syms_load(&dd);
 707                                 ksyms = u64_to_ptr(info->jited_ksyms);
 708                         }
 709
 710                         if (json_output)
 711                                 jsonw_start_array(json_wtr);
 712
 713                         lens = u64_to_ptr(info->jited_func_lens);
 714                         for (i = 0; i < info->nr_jited_func_lens; i++) {
 715                                 if (ksyms) {
 716                                         sym = kernel_syms_search(&dd, ksyms[i]);
 717                                         if (sym)
 718                                                 sprintf(sym_name, "%s", sym->name);
 719                                         else
 720                                                 sprintf(sym_name, "0x%016llx", ksyms[i]);
 721                                 } else {
 722                                         strcpy(sym_name, "unknown");
 723                                 }
 724
 725                                 if (func_info) {
 726                                         record = func_info + i * info->func_info_rec_size;
 727                                         btf_dumper_type_only(btf, record->type_id,
 728                                                              func_sig,
 729                                                              sizeof(func_sig));
 730                                 }
 731
 732                                 if (json_output) {
 733                                         jsonw_start_object(json_wtr);
 734                                         if (func_info && func_sig[0] != '\0') {
 735                                                 jsonw_name(json_wtr, "proto");
 736                                                 jsonw_string(json_wtr, func_sig);
 737                                         }
 738                                         jsonw_name(json_wtr, "name");
 739                                         jsonw_string(json_wtr, sym_name);
 740                                         jsonw_name(json_wtr, "insns");
 741                                 } else {
 742                                         if (func_info && func_sig[0] != '\0')
 743                                                 printf("%s:\n", func_sig);
 744                                         printf("%s:\n", sym_name);
 745                                 }
 746
 747                                 disasm_print_insn(img, lens[i], opcodes,
 748                                                   name, disasm_opt, btf,
 749                                                   prog_linfo, ksyms[i], i,
 750                                                   linum);
 751
 752                                 img += lens[i];
 753
 754                                 if (json_output)
 755                                         jsonw_end_object(json_wtr);
 756                                 else
 757                                         printf("\n");
 758                         }
 759
 760                         if (json_output)
 761                                 jsonw_end_array(json_wtr);
 762                 } else {
 763                         disasm_print_insn(buf, member_len, opcodes, name,
 764                                           disasm_opt, btf, NULL, 0, 0, false);
 765                 }
 766         } else if (visual) {
 767                 if (json_output)
 768                         jsonw_null(json_wtr);
 769                 else
 770                         dump_xlated_cfg(buf, member_len);
 771         } else {
 772                 kernel_syms_load(&dd);
 773                 dd.nr_jited_ksyms = info->nr_jited_ksyms;
 774                 dd.jited_ksyms = u64_to_ptr(info->jited_ksyms);
 775                 dd.btf = btf;
 776                 dd.func_info = func_info;
 777                 dd.finfo_rec_size = info->func_info_rec_size;
 778                 dd.prog_linfo = prog_linfo;
 779
 780                 if (json_output)
 781                         dump_xlated_json(&dd, buf, member_len, opcodes,
 782                                          linum);
 783                 else
 784                         dump_xlated_plain(&dd, buf, member_len, opcodes,
 785                                           linum);
 786                 kernel_syms_destroy(&dd);
 787         }
 788
 789         err = 0;
 790
 791 exit_free:
 792         btf__free(btf);
 793         bpf_prog_linfo__free(prog_linfo);
 794         return err;
 795 }
 796
 797 static int do_dump(int argc, char **argv)
 798 {
 799         struct bpf_prog_info_linear *info_linear;
 800         char *filepath = NULL;
 801         bool opcodes = false;
 802         bool visual = false;
 803         enum dump_mode mode;
 804         bool linum = false;
 805         int *fds = NULL;
 806         int nb_fds, i = 0;
 807         int err = -1;
 808         __u64 arrays;
 809
 810         if (is_prefix(*argv, "jited")) {
 811                 if (disasm_init())
 812                         return -1;
 813                 mode = DUMP_JITED;
 814         } else if (is_prefix(*argv, "xlated")) {
 815                 mode = DUMP_XLATED;
 816         } else {
 817                 p_err("expected 'xlated' or 'jited', got: %s", *argv);
 818                 return -1;
 819         }
 820         NEXT_ARG();
 821
 822         if (argc < 2)
 823                 usage();
 824
 825         fds = malloc(sizeof(int));
 826         if (!fds) {
 827                 p_err("mem alloc failed");
 828                 return -1;
 829         }
 830         nb_fds = prog_parse_fds(&argc, &argv, &fds);
 831         if (nb_fds < 1)
 832                 goto exit_free;
 833
 834         if (is_prefix(*argv, "file")) {
 835                 NEXT_ARG();
 836                 if (!argc) {
 837                         p_err("expected file path");
 838                         goto exit_close;
 839                 }
 840                 if (nb_fds > 1) {
 841                         p_err("several programs matched");
 842                         goto exit_close;
 843                 }
 844
 845                 filepath = *argv;
 846                 NEXT_ARG();
 847         } else if (is_prefix(*argv, "opcodes")) {
 848                 opcodes = true;
 849                 NEXT_ARG();
 850         } else if (is_prefix(*argv, "visual")) {
 851                 if (nb_fds > 1) {
 852                         p_err("several programs matched");
 853                         goto exit_close;
 854                 }
 855
 856                 visual = true;
 857                 NEXT_ARG();
 858         } else if (is_prefix(*argv, "linum")) {
 859                 linum = true;
 860                 NEXT_ARG();
 861         }
 862
 863         if (argc) {
 864                 usage();
 865                 goto exit_close;
 866         }
 867
 868         if (mode == DUMP_JITED)
 869                 arrays = 1UL << BPF_PROG_INFO_JITED_INSNS;
 870         else
 871                 arrays = 1UL << BPF_PROG_INFO_XLATED_INSNS;
 872
 873         arrays |= 1UL << BPF_PROG_INFO_JITED_KSYMS;
 874         arrays |= 1UL << BPF_PROG_INFO_JITED_FUNC_LENS;
 875         arrays |= 1UL << BPF_PROG_INFO_FUNC_INFO;
 876         arrays |= 1UL << BPF_PROG_INFO_LINE_INFO;
 877         arrays |= 1UL << BPF_PROG_INFO_JITED_LINE_INFO;
 878
 879         if (json_output && nb_fds > 1)
 880                 jsonw_start_array(json_wtr);    /* root array */
 881         for (i = 0; i < nb_fds; i++) {
 882                 info_linear = bpf_program__get_prog_info_linear(fds[i], arrays);
 883                 if (IS_ERR_OR_NULL(info_linear)) {
 884                         p_err("can't get prog info: %s", strerror(errno));
 885                         break;
 886                 }
 887
 888                 if (json_output && nb_fds > 1) {
 889                         jsonw_start_object(json_wtr);   /* prog object */
 890                         print_prog_header_json(&info_linear->info);
 891                         jsonw_name(json_wtr, "insns");
 892                 } else if (nb_fds > 1) {
 893                         print_prog_header_plain(&info_linear->info);
 894                 }
 895
 896                 err = prog_dump(&info_linear->info, mode, filepath, opcodes,
 897                                 visual, linum);
 898
 899                 if (json_output && nb_fds > 1)
 900                         jsonw_end_object(json_wtr);     /* prog object */
 901                 else if (i != nb_fds - 1 && nb_fds > 1)
 902                         printf("\n");
 903
 904                 free(info_linear);
 905                 if (err)
 906                         break;
 907                 close(fds[i]);
 908         }
 909         if (json_output && nb_fds > 1)
 910                 jsonw_end_array(json_wtr);      /* root array */
 911
 912 exit_close:
 913         for (; i < nb_fds; i++)
 914                 close(fds[i]);
 915 exit_free:
 916         free(fds);
 917         return err;
 918 }
 919
 920 static int do_pin(int argc, char **argv)
 921 {
 922         int err;
 923
 924         err = do_pin_any(argc, argv, prog_parse_fd);
 925         if (!err && json_output)
 926                 jsonw_null(json_wtr);
 927         return err;
 928 }
 929
 930 struct map_replace {
 931         int idx;
 932         int fd;
 933         char *name;
 934 };
 935
 936 static int map_replace_compar(const void *p1, const void *p2)
 937 {
 938         const struct map_replace *a = p1, *b = p2;
 939
 940         return a->idx - b->idx;
 941 }
 942
 943 static int parse_attach_detach_args(int argc, char **argv, int *progfd,
 944                                     enum bpf_attach_type *attach_type,
 945                                     int *mapfd)
 946 {
 947         if (!REQ_ARGS(3))
 948                 return -EINVAL;
 949
 950         *progfd = prog_parse_fd(&argc, &argv);
 951         if (*progfd < 0)
 952                 return *progfd;
 953
 954         *attach_type = parse_attach_type(*argv);
 955         if (*attach_type == __MAX_BPF_ATTACH_TYPE) {
 956                 p_err("invalid attach/detach type");
 957                 return -EINVAL;
 958         }
 959
 960         if (*attach_type == BPF_FLOW_DISSECTOR) {
 961                 *mapfd = 0;
 962                 return 0;
 963         }
 964
 965         NEXT_ARG();
 966         if (!REQ_ARGS(2))
 967                 return -EINVAL;
 968
 969         *mapfd = map_parse_fd(&argc, &argv);
 970         if (*mapfd < 0)
 971                 return *mapfd;
 972
 973         return 0;
 974 }
 975
 976 static int do_attach(int argc, char **argv)
 977 {
 978         enum bpf_attach_type attach_type;
 979         int err, progfd;
 980         int mapfd;
 981
 982         err = parse_attach_detach_args(argc, argv,
 983                                        &progfd, &attach_type, &mapfd);
 984         if (err)
 985                 return err;
 986
 987         err = bpf_prog_attach(progfd, mapfd, attach_type, 0);
 988         if (err) {
 989                 p_err("failed prog attach to map");
 990                 return -EINVAL;
 991         }
 992
 993         if (json_output)
 994                 jsonw_null(json_wtr);
 995         return 0;
 996 }
 997
 998 static int do_detach(int argc, char **argv)
 999 {
1000         enum bpf_attach_type attach_type;
1001         int err, progfd;
1002         int mapfd;
1003
1004         err = parse_attach_detach_args(argc, argv,
1005                                        &progfd, &attach_type, &mapfd);
1006         if (err)
1007                 return err;
1008
1009         err = bpf_prog_detach2(progfd, mapfd, attach_type);
1010         if (err) {
1011                 p_err("failed prog detach from map");
1012                 return -EINVAL;
1013         }
1014
1015         if (json_output)
1016                 jsonw_null(json_wtr);
1017         return 0;
1018 }
1019
1020 static int check_single_stdin(char *file_data_in, char *file_ctx_in)
1021 {
1022         if (file_data_in && file_ctx_in &&
1023             !strcmp(file_data_in, "-") && !strcmp(file_ctx_in, "-")) {
1024                 p_err("cannot use standard input for both data_in and ctx_in");
1025                 return -1;
1026         }
1027
1028         return 0;
1029 }
1030
1031 static int get_run_data(const char *fname, void **data_ptr, unsigned int *size)
1032 {
1033         size_t block_size = 256;
1034         size_t buf_size = block_size;
1035         size_t nb_read = 0;
1036         void *tmp;
1037         FILE *f;
1038
1039         if (!fname) {
1040                 *data_ptr = NULL;
1041                 *size = 0;
1042                 return 0;
1043         }
1044
1045         if (!strcmp(fname, "-"))
1046                 f = stdin;
1047         else
1048                 f = fopen(fname, "r");
1049         if (!f) {
1050                 p_err("failed to open %s: %s", fname, strerror(errno));
1051                 return -1;
1052         }
1053
1054         *data_ptr = malloc(block_size);
1055         if (!*data_ptr) {
1056                 p_err("failed to allocate memory for data_in/ctx_in: %s",
1057                       strerror(errno));
1058                 goto err_fclose;
1059         }
1060
1061         while ((nb_read += fread(*data_ptr + nb_read, 1, block_size, f))) {
1062                 if (feof(f))
1063                         break;
1064                 if (ferror(f)) {
1065                         p_err("failed to read data_in/ctx_in from %s: %s",
1066                               fname, strerror(errno));
1067                         goto err_free;
1068                 }
1069                 if (nb_read > buf_size - block_size) {
1070                         if (buf_size == UINT32_MAX) {
1071                                 p_err("data_in/ctx_in is too long (max: %d)",
1072                                       UINT32_MAX);
1073                                 goto err_free;
1074                         }
1075                         /* No space for fread()-ing next chunk; realloc() */
1076                         buf_size *= 2;
1077                         tmp = realloc(*data_ptr, buf_size);
1078                         if (!tmp) {
1079                                 p_err("failed to reallocate data_in/ctx_in: %s",
1080                                       strerror(errno));
1081                                 goto err_free;
1082                         }
1083                         *data_ptr = tmp;
1084                 }
1085         }
1086         if (f != stdin)
1087                 fclose(f);
1088
1089         *size = nb_read;
1090         return 0;
1091
1092 err_free:
1093         free(*data_ptr);
1094         *data_ptr = NULL;
1095 err_fclose:
1096         if (f != stdin)
1097                 fclose(f);
1098         return -1;
1099 }
1100
1101 static void hex_print(void *data, unsigned int size, FILE *f)
1102 {
1103         size_t i, j;
1104         char c;
1105
1106         for (i = 0; i < size; i += 16) {
1107                 /* Row offset */
1108                 fprintf(f, "%07zx\t", i);
1109
1110                 /* Hexadecimal values */
1111                 for (j = i; j < i + 16 && j < size; j++)
1112                         fprintf(f, "%02x%s", *(uint8_t *)(data + j),
1113                                 j % 2 ? " " : "");
1114                 for (; j < i + 16; j++)
1115                         fprintf(f, "  %s", j % 2 ? " " : "");
1116
1117                 /* ASCII values (if relevant), '.' otherwise */
1118                 fprintf(f, "| ");
1119                 for (j = i; j < i + 16 && j < size; j++) {
1120                         c = *(char *)(data + j);
1121                         if (c < ' ' || c > '~')
1122                                 c = '.';
1123                         fprintf(f, "%c%s", c, j == i + 7 ? " " : "");
1124                 }
1125
1126                 fprintf(f, "\n");
1127         }
1128 }
1129
1130 static int
1131 print_run_output(void *data, unsigned int size, const char *fname,
1132                  const char *json_key)
1133 {
1134         size_t nb_written;
1135         FILE *f;
1136
1137         if (!fname)
1138                 return 0;
1139
1140         if (!strcmp(fname, "-")) {
1141                 f = stdout;
1142                 if (json_output) {
1143                         jsonw_name(json_wtr, json_key);
1144                         print_data_json(data, size);
1145                 } else {
1146                         hex_print(data, size, f);
1147                 }
1148                 return 0;
1149         }
1150
1151         f = fopen(fname, "w");
1152         if (!f) {
1153                 p_err("failed to open %s: %s", fname, strerror(errno));
1154                 return -1;
1155         }
1156
1157         nb_written = fwrite(data, 1, size, f);
1158         fclose(f);
1159         if (nb_written != size) {
1160                 p_err("failed to write output data/ctx: %s", strerror(errno));
1161                 return -1;
1162         }
1163
1164         return 0;
1165 }
1166
1167 static int alloc_run_data(void **data_ptr, unsigned int size_out)
1168 {
1169         *data_ptr = calloc(size_out, 1);
1170         if (!*data_ptr) {
1171                 p_err("failed to allocate memory for output data/ctx: %s",
1172                       strerror(errno));
1173                 return -1;
1174         }
1175
1176         return 0;
1177 }
1178
1179 static int do_run(int argc, char **argv)
1180 {
1181         char *data_fname_in = NULL, *data_fname_out = NULL;
1182         char *ctx_fname_in = NULL, *ctx_fname_out = NULL;
1183         struct bpf_prog_test_run_attr test_attr = {0};
1184         const unsigned int default_size = SZ_32K;
1185         void *data_in = NULL, *data_out = NULL;
1186         void *ctx_in = NULL, *ctx_out = NULL;
1187         unsigned int repeat = 1;
1188         int fd, err;
1189
1190         if (!REQ_ARGS(4))
1191                 return -1;
1192
1193         fd = prog_parse_fd(&argc, &argv);
1194         if (fd < 0)
1195                 return -1;
1196
1197         while (argc) {
1198                 if (detect_common_prefix(*argv, "data_in", "data_out",
1199                                          "data_size_out", NULL))
1200                         return -1;
1201                 if (detect_common_prefix(*argv, "ctx_in", "ctx_out",
1202                                          "ctx_size_out", NULL))
1203                         return -1;
1204
1205                 if (is_prefix(*argv, "data_in")) {
1206                         NEXT_ARG();
1207                         if (!REQ_ARGS(1))
1208                                 return -1;
1209
1210                         data_fname_in = GET_ARG();
1211                         if (check_single_stdin(data_fname_in, ctx_fname_in))
1212                                 return -1;
1213                 } else if (is_prefix(*argv, "data_out")) {
1214                         NEXT_ARG();
1215                         if (!REQ_ARGS(1))
1216                                 return -1;
1217
1218                         data_fname_out = GET_ARG();
1219                 } else if (is_prefix(*argv, "data_size_out")) {
1220                         char *endptr;
1221
1222                         NEXT_ARG();
1223                         if (!REQ_ARGS(1))
1224                                 return -1;
1225
1226                         test_attr.data_size_out = strtoul(*argv, &endptr, 0);
1227                         if (*endptr) {
1228                                 p_err("can't parse %s as output data size",
1229                                       *argv);
1230                                 return -1;
1231                         }
1232                         NEXT_ARG();
1233                 } else if (is_prefix(*argv, "ctx_in")) {
1234                         NEXT_ARG();
1235                         if (!REQ_ARGS(1))
1236                                 return -1;
1237
1238                         ctx_fname_in = GET_ARG();
1239                         if (check_single_stdin(data_fname_in, ctx_fname_in))
1240                                 return -1;
1241                 } else if (is_prefix(*argv, "ctx_out")) {
1242                         NEXT_ARG();
1243                         if (!REQ_ARGS(1))
1244                                 return -1;
1245
1246                         ctx_fname_out = GET_ARG();
1247                 } else if (is_prefix(*argv, "ctx_size_out")) {
1248                         char *endptr;
1249
1250                         NEXT_ARG();
1251                         if (!REQ_ARGS(1))
1252                                 return -1;
1253
1254                         test_attr.ctx_size_out = strtoul(*argv, &endptr, 0);
1255                         if (*endptr) {
1256                                 p_err("can't parse %s as output context size",
1257                                       *argv);
1258                                 return -1;
1259                         }
1260                         NEXT_ARG();
1261                 } else if (is_prefix(*argv, "repeat")) {
1262                         char *endptr;
1263
1264                         NEXT_ARG();
1265                         if (!REQ_ARGS(1))
1266                                 return -1;
1267
1268                         repeat = strtoul(*argv, &endptr, 0);
1269                         if (*endptr) {
1270                                 p_err("can't parse %s as repeat number",
1271                                       *argv);
1272                                 return -1;
1273                         }
1274                         NEXT_ARG();
1275                 } else {
1276                         p_err("expected no more arguments, 'data_in', 'data_out', 'data_size_out', 'ctx_in', 'ctx_out', 'ctx_size_out' or 'repeat', got: '%s'?",
1277                               *argv);
1278                         return -1;
1279                 }
1280         }
1281
1282         err = get_run_data(data_fname_in, &data_in, &test_attr.data_size_in);
1283         if (err)
1284                 return -1;
1285
1286         if (data_in) {
1287                 if (!test_attr.data_size_out)
1288                         test_attr.data_size_out = default_size;
1289                 err = alloc_run_data(&data_out, test_attr.data_size_out);
1290                 if (err)
1291                         goto free_data_in;
1292         }
1293
1294         err = get_run_data(ctx_fname_in, &ctx_in, &test_attr.ctx_size_in);
1295         if (err)
1296                 goto free_data_out;
1297
1298         if (ctx_in) {
1299                 if (!test_attr.ctx_size_out)
1300                         test_attr.ctx_size_out = default_size;
1301                 err = alloc_run_data(&ctx_out, test_attr.ctx_size_out);
1302                 if (err)
1303                         goto free_ctx_in;
1304         }
1305
1306         test_attr.prog_fd       = fd;
1307         test_attr.repeat        = repeat;
1308         test_attr.data_in       = data_in;
1309         test_attr.data_out      = data_out;
1310         test_attr.ctx_in        = ctx_in;
1311         test_attr.ctx_out       = ctx_out;
1312
1313         err = bpf_prog_test_run_xattr(&test_attr);
1314         if (err) {
1315                 p_err("failed to run program: %s", strerror(errno));
1316                 goto free_ctx_out;
1317         }
1318
1319         err = 0;
1320
1321         if (json_output)
1322                 jsonw_start_object(json_wtr);   /* root */
1323
1324         /* Do not exit on errors occurring when printing output data/context,
1325          * we still want to print return value and duration for program run.
1326          */
1327         if (test_attr.data_size_out)
1328                 err += print_run_output(test_attr.data_out,
1329                                         test_attr.data_size_out,
1330                                         data_fname_out, "data_out");
1331         if (test_attr.ctx_size_out)
1332                 err += print_run_output(test_attr.ctx_out,
1333                                         test_attr.ctx_size_out,
1334                                         ctx_fname_out, "ctx_out");
1335
1336         if (json_output) {
1337                 jsonw_uint_field(json_wtr, "retval", test_attr.retval);
1338                 jsonw_uint_field(json_wtr, "duration", test_attr.duration);
1339                 jsonw_end_object(json_wtr);     /* root */
1340         } else {
1341                 fprintf(stdout, "Return value: %u, duration%s: %uns\n",
1342                         test_attr.retval,
1343                         repeat > 1 ? " (average)" : "", test_attr.duration);
1344         }
1345
1346 free_ctx_out:
1347         free(ctx_out);
1348 free_ctx_in:
1349         free(ctx_in);
1350 free_data_out:
1351         free(data_out);
1352 free_data_in:
1353         free(data_in);
1354
1355         return err;
1356 }
1357
1358 static int
1359 get_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type,
1360                       enum bpf_attach_type *expected_attach_type)
1361 {
1362         libbpf_print_fn_t print_backup;
1363         int ret;
1364
1365         ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
1366         if (!ret)
1367                 return ret;
1368
1369         /* libbpf_prog_type_by_name() failed, let's re-run with debug level */
1370         print_backup = libbpf_set_print(print_all_levels);
1371         ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
1372         libbpf_set_print(print_backup);
1373
1374         return ret;
1375 }
1376
1377 static int load_with_options(int argc, char **argv, bool first_prog_only)
1378 {
1379         enum bpf_prog_type common_prog_type = BPF_PROG_TYPE_UNSPEC;
1380         DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts,
1381                 .relaxed_maps = relaxed_maps,
1382         );
1383         struct bpf_object_load_attr load_attr = { 0 };
1384         enum bpf_attach_type expected_attach_type;
1385         struct map_replace *map_replace = NULL;
1386         struct bpf_program *prog = NULL, *pos;
1387         unsigned int old_map_fds = 0;
1388         const char *pinmaps = NULL;
1389         struct bpf_object *obj;
1390         struct bpf_map *map;
1391         const char *pinfile;
1392         unsigned int i, j;
1393         __u32 ifindex = 0;
1394         const char *file;
1395         int idx, err;
1396
1397
1398         if (!REQ_ARGS(2))
1399                 return -1;
1400         file = GET_ARG();
1401         pinfile = GET_ARG();
1402
1403         while (argc) {
1404                 if (is_prefix(*argv, "type")) {
1405                         char *type;
1406
1407                         NEXT_ARG();
1408
1409                         if (common_prog_type != BPF_PROG_TYPE_UNSPEC) {
1410                                 p_err("program type already specified");
1411                                 goto err_free_reuse_maps;
1412                         }
1413                         if (!REQ_ARGS(1))
1414                                 goto err_free_reuse_maps;
1415
1416                         /* Put a '/' at the end of type to appease libbpf */
1417                         type = malloc(strlen(*argv) + 2);
1418                         if (!type) {
1419                                 p_err("mem alloc failed");
1420                                 goto err_free_reuse_maps;
1421                         }
1422                         *type = 0;
1423                         strcat(type, *argv);
1424                         strcat(type, "/");
1425
1426                         err = get_prog_type_by_name(type, &common_prog_type,
1427                                                     &expected_attach_type);
1428                         free(type);
1429                         if (err < 0)
1430                                 goto err_free_reuse_maps;
1431
1432                         NEXT_ARG();
1433                 } else if (is_prefix(*argv, "map")) {
1434                         void *new_map_replace;
1435                         char *endptr, *name;
1436                         int fd;
1437
1438                         NEXT_ARG();
1439
1440                         if (!REQ_ARGS(4))
1441                                 goto err_free_reuse_maps;
1442
1443                         if (is_prefix(*argv, "idx")) {
1444                                 NEXT_ARG();
1445
1446                                 idx = strtoul(*argv, &endptr, 0);
1447                                 if (*endptr) {
1448                                         p_err("can't parse %s as IDX", *argv);
1449                                         goto err_free_reuse_maps;
1450                                 }
1451                                 name = NULL;
1452                         } else if (is_prefix(*argv, "name")) {
1453                                 NEXT_ARG();
1454
1455                                 name = *argv;
1456                                 idx = -1;
1457                         } else {
1458                                 p_err("expected 'idx' or 'name', got: '%s'?",
1459                                       *argv);
1460                                 goto err_free_reuse_maps;
1461                         }
1462                         NEXT_ARG();
1463
1464                         fd = map_parse_fd(&argc, &argv);
1465                         if (fd < 0)
1466                                 goto err_free_reuse_maps;
1467
1468                         new_map_replace = reallocarray(map_replace,
1469                                                        old_map_fds + 1,
1470                                                        sizeof(*map_replace));
1471                         if (!new_map_replace) {
1472                                 p_err("mem alloc failed");
1473                                 goto err_free_reuse_maps;
1474                         }
1475                         map_replace = new_map_replace;
1476
1477                         map_replace[old_map_fds].idx = idx;
1478                         map_replace[old_map_fds].name = name;
1479                         map_replace[old_map_fds].fd = fd;
1480                         old_map_fds++;
1481                 } else if (is_prefix(*argv, "dev")) {
1482                         NEXT_ARG();
1483
1484                         if (ifindex) {
1485                                 p_err("offload device already specified");
1486                                 goto err_free_reuse_maps;
1487                         }
1488                         if (!REQ_ARGS(1))
1489                                 goto err_free_reuse_maps;
1490
1491                         ifindex = if_nametoindex(*argv);
1492                         if (!ifindex) {
1493                                 p_err("unrecognized netdevice '%s': %s",
1494                                       *argv, strerror(errno));
1495                                 goto err_free_reuse_maps;
1496                         }
1497                         NEXT_ARG();
1498                 } else if (is_prefix(*argv, "pinmaps")) {
1499                         NEXT_ARG();
1500
1501                         if (!REQ_ARGS(1))
1502                                 goto err_free_reuse_maps;
1503
1504                         pinmaps = GET_ARG();
1505                 } else {
1506                         p_err("expected no more arguments, 'type', 'map' or 'dev', got: '%s'?",
1507                               *argv);
1508                         goto err_free_reuse_maps;
1509                 }
1510         }
1511
1512         set_max_rlimit();
1513
1514         obj = bpf_object__open_file(file, &open_opts);
1515         if (libbpf_get_error(obj)) {
1516                 p_err("failed to open object file");
1517                 goto err_free_reuse_maps;
1518         }
1519
1520         bpf_object__for_each_program(pos, obj) {
1521                 enum bpf_prog_type prog_type = common_prog_type;
1522
1523                 if (prog_type == BPF_PROG_TYPE_UNSPEC) {
1524                         const char *sec_name = bpf_program__section_name(pos);
1525
1526                         err = get_prog_type_by_name(sec_name, &prog_type,
1527                                                     &expected_attach_type);
1528                         if (err < 0)
1529                                 goto err_close_obj;
1530                 }
1531
1532                 bpf_program__set_ifindex(pos, ifindex);
1533                 bpf_program__set_type(pos, prog_type);
1534                 bpf_program__set_expected_attach_type(pos, expected_attach_type);
1535         }
1536
1537         qsort(map_replace, old_map_fds, sizeof(*map_replace),
1538               map_replace_compar);
1539
1540         /* After the sort maps by name will be first on the list, because they
1541          * have idx == -1.  Resolve them.
1542          */
1543         j = 0;
1544         while (j < old_map_fds && map_replace[j].name) {
1545                 i = 0;
1546                 bpf_object__for_each_map(map, obj) {
1547                         if (!strcmp(bpf_map__name(map), map_replace[j].name)) {
1548                                 map_replace[j].idx = i;
1549                                 break;
1550                         }
1551                         i++;
1552                 }
1553                 if (map_replace[j].idx == -1) {
1554                         p_err("unable to find map '%s'", map_replace[j].name);
1555                         goto err_close_obj;
1556                 }
1557                 j++;
1558         }
1559         /* Resort if any names were resolved */
1560         if (j)
1561                 qsort(map_replace, old_map_fds, sizeof(*map_replace),
1562                       map_replace_compar);
1563
1564         /* Set ifindex and name reuse */
1565         j = 0;
1566         idx = 0;
1567         bpf_object__for_each_map(map, obj) {
1568                 if (!bpf_map__is_offload_neutral(map))
1569                         bpf_map__set_ifindex(map, ifindex);
1570
1571                 if (j < old_map_fds && idx == map_replace[j].idx) {
1572                         err = bpf_map__reuse_fd(map, map_replace[j++].fd);
1573                         if (err) {
1574                                 p_err("unable to set up map reuse: %d", err);
1575                                 goto err_close_obj;
1576                         }
1577
1578                         /* Next reuse wants to apply to the same map */
1579                         if (j < old_map_fds && map_replace[j].idx == idx) {
1580                                 p_err("replacement for map idx %d specified more than once",
1581                                       idx);
1582                                 goto err_close_obj;
1583                         }
1584                 }
1585
1586                 idx++;
1587         }
1588         if (j < old_map_fds) {
1589                 p_err("map idx '%d' not used", map_replace[j].idx);
1590                 goto err_close_obj;
1591         }
1592
1593         load_attr.obj = obj;
1594         if (verifier_logs)
1595                 /* log_level1 + log_level2 + stats, but not stable UAPI */
1596                 load_attr.log_level = 1 + 2 + 4;
1597
1598         err = bpf_object__load_xattr(&load_attr);
1599         if (err) {
1600                 p_err("failed to load object file");
1601                 goto err_close_obj;
1602         }
1603
1604         err = mount_bpffs_for_pin(pinfile);
1605         if (err)
1606                 goto err_close_obj;
1607
1608         if (first_prog_only) {
1609                 prog = bpf_program__next(NULL, obj);
1610                 if (!prog) {
1611                         p_err("object file doesn't contain any bpf program");
1612                         goto err_close_obj;
1613                 }
1614
1615                 err = bpf_obj_pin(bpf_program__fd(prog), pinfile);
1616                 if (err) {
1617                         p_err("failed to pin program %s",
1618                               bpf_program__section_name(prog));
1619                         goto err_close_obj;
1620                 }
1621         } else {
1622                 err = bpf_object__pin_programs(obj, pinfile);
1623                 if (err) {
1624                         p_err("failed to pin all programs");
1625                         goto err_close_obj;
1626                 }
1627         }
1628
1629         if (pinmaps) {
1630                 err = bpf_object__pin_maps(obj, pinmaps);
1631                 if (err) {
1632                         p_err("failed to pin all maps");
1633                         goto err_unpin;
1634                 }
1635         }
1636
1637         if (json_output)
1638                 jsonw_null(json_wtr);
1639
1640         bpf_object__close(obj);
1641         for (i = 0; i < old_map_fds; i++)
1642                 close(map_replace[i].fd);
1643         free(map_replace);
1644
1645         return 0;
1646
1647 err_unpin:
1648         if (first_prog_only)
1649                 unlink(pinfile);
1650         else
1651                 bpf_object__unpin_programs(obj, pinfile);
1652 err_close_obj:
1653         bpf_object__close(obj);
1654 err_free_reuse_maps:
1655         for (i = 0; i < old_map_fds; i++)
1656                 close(map_replace[i].fd);
1657         free(map_replace);
1658         return -1;
1659 }
1660
1661 static int count_open_fds(void)
1662 {
1663         DIR *dp = opendir("/proc/self/fd");
1664         struct dirent *de;
1665         int cnt = -3;
1666
1667         if (!dp)
1668                 return -1;
1669
1670         while ((de = readdir(dp)))
1671                 cnt++;
1672
1673         closedir(dp);
1674         return cnt;
1675 }
1676
1677 static int try_loader(struct gen_loader_opts *gen)
1678 {
1679         struct bpf_load_and_run_opts opts = {};
1680         struct bpf_loader_ctx *ctx;
1681         int ctx_sz = sizeof(*ctx) + 64 * max(sizeof(struct bpf_map_desc),
1682                                              sizeof(struct bpf_prog_desc));
1683         int log_buf_sz = (1u << 24) - 1;
1684         int err, fds_before, fd_delta;
1685         char *log_buf;
1686
1687         ctx = alloca(ctx_sz);
1688         memset(ctx, 0, ctx_sz);
1689         ctx->sz = ctx_sz;
1690         ctx->log_level = 1;
1691         ctx->log_size = log_buf_sz;
1692         log_buf = malloc(log_buf_sz);
1693         if (!log_buf)
1694                 return -ENOMEM;
1695         ctx->log_buf = (long) log_buf;
1696         opts.ctx = ctx;
1697         opts.data = gen->data;
1698         opts.data_sz = gen->data_sz;
1699         opts.insns = gen->insns;
1700         opts.insns_sz = gen->insns_sz;
1701         fds_before = count_open_fds();
1702         err = bpf_load_and_run(&opts);
1703         fd_delta = count_open_fds() - fds_before;
1704         if (err < 0) {
1705                 fprintf(stderr, "err %d\n%s\n%s", err, opts.errstr, log_buf);
1706                 if (fd_delta)
1707                         fprintf(stderr, "loader prog leaked %d FDs\n",
1708                                 fd_delta);
1709         }
1710         free(log_buf);
1711         return err;
1712 }
1713
1714 static int do_loader(int argc, char **argv)
1715 {
1716         DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts);
1717         DECLARE_LIBBPF_OPTS(gen_loader_opts, gen);
1718         struct bpf_object_load_attr load_attr = {};
1719         struct bpf_object *obj;
1720         const char *file;
1721         int err = 0;
1722
1723         if (!REQ_ARGS(1))
1724                 return -1;
1725         file = GET_ARG();
1726
1727         obj = bpf_object__open_file(file, &open_opts);
1728         if (libbpf_get_error(obj)) {
1729                 p_err("failed to open object file");
1730                 goto err_close_obj;
1731         }
1732
1733         err = bpf_object__gen_loader(obj, &gen);
1734         if (err)
1735                 goto err_close_obj;
1736
1737         load_attr.obj = obj;
1738         if (verifier_logs)
1739                 /* log_level1 + log_level2 + stats, but not stable UAPI */
1740                 load_attr.log_level = 1 + 2 + 4;
1741
1742         err = bpf_object__load_xattr(&load_attr);
1743         if (err) {
1744                 p_err("failed to load object file");
1745                 goto err_close_obj;
1746         }
1747
1748         if (verifier_logs) {
1749                 struct dump_data dd = {};
1750
1751                 kernel_syms_load(&dd);
1752                 dump_xlated_plain(&dd, (void *)gen.insns, gen.insns_sz, false, false);
1753                 kernel_syms_destroy(&dd);
1754         }
1755         err = try_loader(&gen);
1756 err_close_obj:
1757         bpf_object__close(obj);
1758         return err;
1759 }
1760
1761 static int do_load(int argc, char **argv)
1762 {
1763         if (use_loader)
1764                 return do_loader(argc, argv);
1765         return load_with_options(argc, argv, true);
1766 }
1767
1768 static int do_loadall(int argc, char **argv)
1769 {
1770         return load_with_options(argc, argv, false);
1771 }
1772
1773 #ifdef BPFTOOL_WITHOUT_SKELETONS
1774
1775 static int do_profile(int argc, char **argv)
1776 {
1777         p_err("bpftool prog profile command is not supported. Please build bpftool with clang >= 10.0.0");
1778         return 0;
1779 }
1780
1781 #else /* BPFTOOL_WITHOUT_SKELETONS */
1782
1783 #include "profiler.skel.h"
1784
1785 struct profile_metric {
1786         const char *name;
1787         struct bpf_perf_event_value val;
1788         struct perf_event_attr attr;
1789         bool selected;
1790
1791         /* calculate ratios like instructions per cycle */
1792         const int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */
1793         const char *ratio_desc;
1794         const float ratio_mul;
1795 } metrics[] = {
1796         {
1797                 .name = "cycles",
1798                 .attr = {
1799                         .type = PERF_TYPE_HARDWARE,
1800                         .config = PERF_COUNT_HW_CPU_CYCLES,
1801                         .exclude_user = 1,
1802                 },
1803         },
1804         {
1805                 .name = "instructions",
1806                 .attr = {
1807                         .type = PERF_TYPE_HARDWARE,
1808                         .config = PERF_COUNT_HW_INSTRUCTIONS,
1809                         .exclude_user = 1,
1810                 },
1811                 .ratio_metric = 1,
1812                 .ratio_desc = "insns per cycle",
1813                 .ratio_mul = 1.0,
1814         },
1815         {
1816                 .name = "l1d_loads",
1817                 .attr = {
1818                         .type = PERF_TYPE_HW_CACHE,
1819                         .config =
1820                                 PERF_COUNT_HW_CACHE_L1D |
1821                                 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1822                                 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
1823                         .exclude_user = 1,
1824                 },
1825         },
1826         {
1827                 .name = "llc_misses",
1828                 .attr = {
1829                         .type = PERF_TYPE_HW_CACHE,
1830                         .config =
1831                                 PERF_COUNT_HW_CACHE_LL |
1832                                 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1833                                 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
1834                         .exclude_user = 1
1835                 },
1836                 .ratio_metric = 2,
1837                 .ratio_desc = "LLC misses per million insns",
1838                 .ratio_mul = 1e6,
1839         },
1840         {
1841                 .name = "itlb_misses",
1842                 .attr = {
1843                         .type = PERF_TYPE_HW_CACHE,
1844                         .config =
1845                                 PERF_COUNT_HW_CACHE_ITLB |
1846                                 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1847                                 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
1848                         .exclude_user = 1
1849                 },
1850                 .ratio_metric = 2,
1851                 .ratio_desc = "itlb misses per million insns",
1852                 .ratio_mul = 1e6,
1853         },
1854         {
1855                 .name = "dtlb_misses",
1856                 .attr = {
1857                         .type = PERF_TYPE_HW_CACHE,
1858                         .config =
1859                                 PERF_COUNT_HW_CACHE_DTLB |
1860                                 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1861                                 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
1862                         .exclude_user = 1
1863                 },
1864                 .ratio_metric = 2,
1865                 .ratio_desc = "dtlb misses per million insns",
1866                 .ratio_mul = 1e6,
1867         },
1868 };
1869
1870 static __u64 profile_total_count;
1871
1872 #define MAX_NUM_PROFILE_METRICS 4
1873
1874 static int profile_parse_metrics(int argc, char **argv)
1875 {
1876         unsigned int metric_cnt;
1877         int selected_cnt = 0;
1878         unsigned int i;
1879
1880         metric_cnt = sizeof(metrics) / sizeof(struct profile_metric);
1881
1882         while (argc > 0) {
1883                 for (i = 0; i < metric_cnt; i++) {
1884                         if (is_prefix(argv[0], metrics[i].name)) {
1885                                 if (!metrics[i].selected)
1886                                         selected_cnt++;
1887                                 metrics[i].selected = true;
1888                                 break;
1889                         }
1890                 }
1891                 if (i == metric_cnt) {
1892                         p_err("unknown metric %s", argv[0]);
1893                         return -1;
1894                 }
1895                 NEXT_ARG();
1896         }
1897         if (selected_cnt > MAX_NUM_PROFILE_METRICS) {
1898                 p_err("too many (%d) metrics, please specify no more than %d metrics at at time",
1899                       selected_cnt, MAX_NUM_PROFILE_METRICS);
1900                 return -1;
1901         }
1902         return selected_cnt;
1903 }
1904
1905 static void profile_read_values(struct profiler_bpf *obj)
1906 {
1907         __u32 m, cpu, num_cpu = obj->rodata->num_cpu;
1908         int reading_map_fd, count_map_fd;
1909         __u64 counts[num_cpu];
1910         __u32 key = 0;
1911         int err;
1912
1913         reading_map_fd = bpf_map__fd(obj->maps.accum_readings);
1914         count_map_fd = bpf_map__fd(obj->maps.counts);
1915         if (reading_map_fd < 0 || count_map_fd < 0) {
1916                 p_err("failed to get fd for map");
1917                 return;
1918         }
1919
1920         err = bpf_map_lookup_elem(count_map_fd, &key, counts);
1921         if (err) {
1922                 p_err("failed to read count_map: %s", strerror(errno));
1923                 return;
1924         }
1925
1926         profile_total_count = 0;
1927         for (cpu = 0; cpu < num_cpu; cpu++)
1928                 profile_total_count += counts[cpu];
1929
1930         for (m = 0; m < ARRAY_SIZE(metrics); m++) {
1931                 struct bpf_perf_event_value values[num_cpu];
1932
1933                 if (!metrics[m].selected)
1934                         continue;
1935
1936                 err = bpf_map_lookup_elem(reading_map_fd, &key, values);
1937                 if (err) {
1938                         p_err("failed to read reading_map: %s",
1939                               strerror(errno));
1940                         return;
1941                 }
1942                 for (cpu = 0; cpu < num_cpu; cpu++) {
1943                         metrics[m].val.counter += values[cpu].counter;
1944                         metrics[m].val.enabled += values[cpu].enabled;
1945                         metrics[m].val.running += values[cpu].running;
1946                 }
1947                 key++;
1948         }
1949 }
1950
1951 static void profile_print_readings_json(void)
1952 {
1953         __u32 m;
1954
1955         jsonw_start_array(json_wtr);
1956         for (m = 0; m < ARRAY_SIZE(metrics); m++) {
1957                 if (!metrics[m].selected)
1958                         continue;
1959                 jsonw_start_object(json_wtr);
1960                 jsonw_string_field(json_wtr, "metric", metrics[m].name);
1961                 jsonw_lluint_field(json_wtr, "run_cnt", profile_total_count);
1962                 jsonw_lluint_field(json_wtr, "value", metrics[m].val.counter);
1963                 jsonw_lluint_field(json_wtr, "enabled", metrics[m].val.enabled);
1964                 jsonw_lluint_field(json_wtr, "running", metrics[m].val.running);
1965
1966                 jsonw_end_object(json_wtr);
1967         }
1968         jsonw_end_array(json_wtr);
1969 }
1970
1971 static void profile_print_readings_plain(void)
1972 {
1973         __u32 m;
1974
1975         printf("\n%18llu %-20s\n", profile_total_count, "run_cnt");
1976         for (m = 0; m < ARRAY_SIZE(metrics); m++) {
1977                 struct bpf_perf_event_value *val = &metrics[m].val;
1978                 int r;
1979
1980                 if (!metrics[m].selected)
1981                         continue;
1982                 printf("%18llu %-20s", val->counter, metrics[m].name);
1983
1984                 r = metrics[m].ratio_metric - 1;
1985                 if (r >= 0 && metrics[r].selected &&
1986                     metrics[r].val.counter > 0) {
1987                         printf("# %8.2f %-30s",
1988                                val->counter * metrics[m].ratio_mul /
1989                                metrics[r].val.counter,
1990                                metrics[m].ratio_desc);
1991                 } else {
1992                         printf("%-41s", "");
1993                 }
1994
1995                 if (val->enabled > val->running)
1996                         printf("(%4.2f%%)",
1997                                val->running * 100.0 / val->enabled);
1998                 printf("\n");
1999         }
2000 }
2001
2002 static void profile_print_readings(void)
2003 {
2004         if (json_output)
2005                 profile_print_readings_json();
2006         else
2007                 profile_print_readings_plain();
2008 }
2009
2010 static char *profile_target_name(int tgt_fd)
2011 {
2012         struct bpf_prog_info_linear *info_linear;
2013         struct bpf_func_info *func_info;
2014         const struct btf_type *t;
2015         struct btf *btf = NULL;
2016         char *name = NULL;
2017
2018         info_linear = bpf_program__get_prog_info_linear(
2019                 tgt_fd, 1UL << BPF_PROG_INFO_FUNC_INFO);
2020         if (IS_ERR_OR_NULL(info_linear)) {
2021                 p_err("failed to get info_linear for prog FD %d", tgt_fd);
2022                 return NULL;
2023         }
2024
2025         if (info_linear->info.btf_id == 0) {
2026                 p_err("prog FD %d doesn't have valid btf", tgt_fd);
2027                 goto out;
2028         }
2029
2030         btf = btf__load_from_kernel_by_id(info_linear->info.btf_id);
2031         if (libbpf_get_error(btf)) {
2032                 p_err("failed to load btf for prog FD %d", tgt_fd);
2033                 goto out;
2034         }
2035
2036         func_info = u64_to_ptr(info_linear->info.func_info);
2037         t = btf__type_by_id(btf, func_info[0].type_id);
2038         if (!t) {
2039                 p_err("btf %d doesn't have type %d",
2040                       info_linear->info.btf_id, func_info[0].type_id);
2041                 goto out;
2042         }
2043         name = strdup(btf__name_by_offset(btf, t->name_off));
2044 out:
2045         btf__free(btf);
2046         free(info_linear);
2047         return name;
2048 }
2049
2050 static struct profiler_bpf *profile_obj;
2051 static int profile_tgt_fd = -1;
2052 static char *profile_tgt_name;
2053 static int *profile_perf_events;
2054 static int profile_perf_event_cnt;
2055
2056 static void profile_close_perf_events(struct profiler_bpf *obj)
2057 {
2058         int i;
2059
2060         for (i = profile_perf_event_cnt - 1; i >= 0; i--)
2061                 close(profile_perf_events[i]);
2062
2063         free(profile_perf_events);
2064         profile_perf_event_cnt = 0;
2065 }
2066
2067 static int profile_open_perf_events(struct profiler_bpf *obj)
2068 {
2069         unsigned int cpu, m;
2070         int map_fd, pmu_fd;
2071
2072         profile_perf_events = calloc(
2073                 sizeof(int), obj->rodata->num_cpu * obj->rodata->num_metric);
2074         if (!profile_perf_events) {
2075                 p_err("failed to allocate memory for perf_event array: %s",
2076                       strerror(errno));
2077                 return -1;
2078         }
2079         map_fd = bpf_map__fd(obj->maps.events);
2080         if (map_fd < 0) {
2081                 p_err("failed to get fd for events map");
2082                 return -1;
2083         }
2084
2085         for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2086                 if (!metrics[m].selected)
2087                         continue;
2088                 for (cpu = 0; cpu < obj->rodata->num_cpu; cpu++) {
2089                         pmu_fd = syscall(__NR_perf_event_open, &metrics[m].attr,
2090                                          -1/*pid*/, cpu, -1/*group_fd*/, 0);
2091                         if (pmu_fd < 0 ||
2092                             bpf_map_update_elem(map_fd, &profile_perf_event_cnt,
2093                                                 &pmu_fd, BPF_ANY) ||
2094                             ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0)) {
2095                                 p_err("failed to create event %s on cpu %d",
2096                                       metrics[m].name, cpu);
2097                                 return -1;
2098                         }
2099                         profile_perf_events[profile_perf_event_cnt++] = pmu_fd;
2100                 }
2101         }
2102         return 0;
2103 }
2104
2105 static void profile_print_and_cleanup(void)
2106 {
2107         profile_close_perf_events(profile_obj);
2108         profile_read_values(profile_obj);
2109         profile_print_readings();
2110         profiler_bpf__destroy(profile_obj);
2111
2112         close(profile_tgt_fd);
2113         free(profile_tgt_name);
2114 }
2115
2116 static void int_exit(int signo)
2117 {
2118         profile_print_and_cleanup();
2119         exit(0);
2120 }
2121
2122 static int do_profile(int argc, char **argv)
2123 {
2124         int num_metric, num_cpu, err = -1;
2125         struct bpf_program *prog;
2126         unsigned long duration;
2127         char *endptr;
2128
2129         /* we at least need two args for the prog and one metric */
2130         if (!REQ_ARGS(3))
2131                 return -EINVAL;
2132
2133         /* parse target fd */
2134         profile_tgt_fd = prog_parse_fd(&argc, &argv);
2135         if (profile_tgt_fd < 0) {
2136                 p_err("failed to parse fd");
2137                 return -1;
2138         }
2139
2140         /* parse profiling optional duration */
2141         if (argc > 2 && is_prefix(argv[0], "duration")) {
2142                 NEXT_ARG();
2143                 duration = strtoul(*argv, &endptr, 0);
2144                 if (*endptr)
2145                         usage();
2146                 NEXT_ARG();
2147         } else {
2148                 duration = UINT_MAX;
2149         }
2150
2151         num_metric = profile_parse_metrics(argc, argv);
2152         if (num_metric <= 0)
2153                 goto out;
2154
2155         num_cpu = libbpf_num_possible_cpus();
2156         if (num_cpu <= 0) {
2157                 p_err("failed to identify number of CPUs");
2158                 goto out;
2159         }
2160
2161         profile_obj = profiler_bpf__open();
2162         if (!profile_obj) {
2163                 p_err("failed to open and/or load BPF object");
2164                 goto out;
2165         }
2166
2167         profile_obj->rodata->num_cpu = num_cpu;
2168         profile_obj->rodata->num_metric = num_metric;
2169
2170         /* adjust map sizes */
2171         bpf_map__resize(profile_obj->maps.events, num_metric * num_cpu);
2172         bpf_map__resize(profile_obj->maps.fentry_readings, num_metric);
2173         bpf_map__resize(profile_obj->maps.accum_readings, num_metric);
2174         bpf_map__resize(profile_obj->maps.counts, 1);
2175
2176         /* change target name */
2177         profile_tgt_name = profile_target_name(profile_tgt_fd);
2178         if (!profile_tgt_name)
2179                 goto out;
2180
2181         bpf_object__for_each_program(prog, profile_obj->obj) {
2182                 err = bpf_program__set_attach_target(prog, profile_tgt_fd,
2183                                                      profile_tgt_name);
2184                 if (err) {
2185                         p_err("failed to set attach target\n");
2186                         goto out;
2187                 }
2188         }
2189
2190         set_max_rlimit();
2191         err = profiler_bpf__load(profile_obj);
2192         if (err) {
2193                 p_err("failed to load profile_obj");
2194                 goto out;
2195         }
2196
2197         err = profile_open_perf_events(profile_obj);
2198         if (err)
2199                 goto out;
2200
2201         err = profiler_bpf__attach(profile_obj);
2202         if (err) {
2203                 p_err("failed to attach profile_obj");
2204                 goto out;
2205         }
2206         signal(SIGINT, int_exit);
2207
2208         sleep(duration);
2209         profile_print_and_cleanup();
2210         return 0;
2211
2212 out:
2213         profile_close_perf_events(profile_obj);
2214         if (profile_obj)
2215                 profiler_bpf__destroy(profile_obj);
2216         close(profile_tgt_fd);
2217         free(profile_tgt_name);
2218         return err;
2219 }
2220
2221 #endif /* BPFTOOL_WITHOUT_SKELETONS */
2222
2223 static int do_help(int argc, char **argv)
2224 {
2225         if (json_output) {
2226                 jsonw_null(json_wtr);
2227                 return 0;
2228         }
2229
2230         fprintf(stderr,
2231                 "Usage: %1$s %2$s { show | list } [PROG]\n"
2232                 "       %1$s %2$s dump xlated PROG [{ file FILE | opcodes | visual | linum }]\n"
2233                 "       %1$s %2$s dump jited  PROG [{ file FILE | opcodes | linum }]\n"
2234                 "       %1$s %2$s pin   PROG FILE\n"
2235                 "       %1$s %2$s { load | loadall } OBJ  PATH \\\n"
2236                 "                         [type TYPE] [dev NAME] \\\n"
2237                 "                         [map { idx IDX | name NAME } MAP]\\\n"
2238                 "                         [pinmaps MAP_DIR]\n"
2239                 "       %1$s %2$s attach PROG ATTACH_TYPE [MAP]\n"
2240                 "       %1$s %2$s detach PROG ATTACH_TYPE [MAP]\n"
2241                 "       %1$s %2$s run PROG \\\n"
2242                 "                         data_in FILE \\\n"
2243                 "                         [data_out FILE [data_size_out L]] \\\n"
2244                 "                         [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n"
2245                 "                         [repeat N]\n"
2246                 "       %1$s %2$s profile PROG [duration DURATION] METRICs\n"
2247                 "       %1$s %2$s tracelog\n"
2248                 "       %1$s %2$s help\n"
2249                 "\n"
2250                 "       " HELP_SPEC_MAP "\n"
2251                 "       " HELP_SPEC_PROGRAM "\n"
2252                 "       TYPE := { socket | kprobe | kretprobe | classifier | action |\n"
2253                 "                 tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n"
2254                 "                 cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n"
2255                 "                 lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n"
2256                 "                 sk_reuseport | flow_dissector | cgroup/sysctl |\n"
2257                 "                 cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"
2258                 "                 cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"
2259                 "                 cgroup/getpeername4 | cgroup/getpeername6 |\n"
2260                 "                 cgroup/getsockname4 | cgroup/getsockname6 | cgroup/sendmsg4 |\n"
2261                 "                 cgroup/sendmsg6 | cgroup/recvmsg4 | cgroup/recvmsg6 |\n"
2262                 "                 cgroup/getsockopt | cgroup/setsockopt | cgroup/sock_release |\n"
2263                 "                 struct_ops | fentry | fexit | freplace | sk_lookup }\n"
2264                 "       ATTACH_TYPE := { msg_verdict | skb_verdict | stream_verdict |\n"
2265                 "                        stream_parser | flow_dissector }\n"
2266                 "       METRIC := { cycles | instructions | l1d_loads | llc_misses | itlb_misses | dtlb_misses }\n"
2267                 "       " HELP_SPEC_OPTIONS " |\n"
2268                 "                    {-f|--bpffs} | {-m|--mapcompat} | {-n|--nomount} |\n"
2269                 "                    {-L|--use-loader} }\n"
2270                 "",
2271                 bin_name, argv[-2]);
2272
2273         return 0;
2274 }
2275
2276 static const struct cmd cmds[] = {
2277         { "show",       do_show },
2278         { "list",       do_show },
2279         { "help",       do_help },
2280         { "dump",       do_dump },
2281         { "pin",        do_pin },
2282         { "load",       do_load },
2283         { "loadall",    do_loadall },
2284         { "attach",     do_attach },
2285         { "detach",     do_detach },
2286         { "tracelog",   do_tracelog },
2287         { "run",        do_run },
2288         { "profile",    do_profile },
2289         { 0 }
2290 };
2291
2292 int do_prog(int argc, char **argv)
2293 {
2294         return cmd_select(cmds, argc, argv, do_help);
2295 }