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