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1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2/* Copyright (C) 2017-2018 Netronome Systems, Inc. */
3
4#ifndef _GNU_SOURCE
5#define _GNU_SOURCE
6#endif
7#include <errno.h>
8#include <fcntl.h>
9#include <signal.h>
10#include <stdarg.h>
11#include <stdio.h>
12#include <stdlib.h>
13#include <string.h>
14#include <time.h>
15#include <unistd.h>
16#include <net/if.h>
17#include <sys/ioctl.h>
18#include <sys/types.h>
19#include <sys/stat.h>
20#include <sys/syscall.h>
21#include <dirent.h>
22
23#include <linux/err.h>
24#include <linux/perf_event.h>
25#include <linux/sizes.h>
26
27#include <bpf/bpf.h>
28#include <bpf/btf.h>
29#include <bpf/hashmap.h>
30#include <bpf/libbpf.h>
31#include <bpf/libbpf_internal.h>
32#include <bpf/skel_internal.h>
33
34#include "cfg.h"
35#include "main.h"
36#include "xlated_dumper.h"
37
38#define BPF_METADATA_PREFIX "bpf_metadata_"
39#define BPF_METADATA_PREFIX_LEN (sizeof(BPF_METADATA_PREFIX) - 1)
40
41enum dump_mode {
42 DUMP_JITED,
43 DUMP_XLATED,
44};
45
46static const bool attach_types[] = {
47 [BPF_SK_SKB_STREAM_PARSER] = true,
48 [BPF_SK_SKB_STREAM_VERDICT] = true,
49 [BPF_SK_SKB_VERDICT] = true,
50 [BPF_SK_MSG_VERDICT] = true,
51 [BPF_FLOW_DISSECTOR] = true,
52 [__MAX_BPF_ATTACH_TYPE] = false,
53};
54
55/* Textual representations traditionally used by the program and kept around
56 * for the sake of backwards compatibility.
57 */
58static const char * const attach_type_strings[] = {
59 [BPF_SK_SKB_STREAM_PARSER] = "stream_parser",
60 [BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict",
61 [BPF_SK_SKB_VERDICT] = "skb_verdict",
62 [BPF_SK_MSG_VERDICT] = "msg_verdict",
63 [__MAX_BPF_ATTACH_TYPE] = NULL,
64};
65
66static struct hashmap *prog_table;
67
68static enum bpf_attach_type parse_attach_type(const char *str)
69{
70 enum bpf_attach_type type;
71
72 for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) {
73 if (attach_types[type]) {
74 const char *attach_type_str;
75
76 attach_type_str = libbpf_bpf_attach_type_str(type);
77 if (!strcmp(str, attach_type_str))
78 return type;
79 }
80
81 if (attach_type_strings[type] &&
82 is_prefix(str, attach_type_strings[type]))
83 return type;
84 }
85
86 return __MAX_BPF_ATTACH_TYPE;
87}
88
89static int prep_prog_info(struct bpf_prog_info *const info, enum dump_mode mode,
90 void **info_data, size_t *const info_data_sz)
91{
92 struct bpf_prog_info holder = {};
93 size_t needed = 0;
94 void *ptr;
95
96 if (mode == DUMP_JITED) {
97 holder.jited_prog_len = info->jited_prog_len;
98 needed += info->jited_prog_len;
99 } else {
100 holder.xlated_prog_len = info->xlated_prog_len;
101 needed += info->xlated_prog_len;
102 }
103
104 holder.nr_jited_ksyms = info->nr_jited_ksyms;
105 needed += info->nr_jited_ksyms * sizeof(__u64);
106
107 holder.nr_jited_func_lens = info->nr_jited_func_lens;
108 needed += info->nr_jited_func_lens * sizeof(__u32);
109
110 holder.nr_func_info = info->nr_func_info;
111 holder.func_info_rec_size = info->func_info_rec_size;
112 needed += info->nr_func_info * info->func_info_rec_size;
113
114 holder.nr_line_info = info->nr_line_info;
115 holder.line_info_rec_size = info->line_info_rec_size;
116 needed += info->nr_line_info * info->line_info_rec_size;
117
118 holder.nr_jited_line_info = info->nr_jited_line_info;
119 holder.jited_line_info_rec_size = info->jited_line_info_rec_size;
120 needed += info->nr_jited_line_info * info->jited_line_info_rec_size;
121
122 if (needed > *info_data_sz) {
123 ptr = realloc(*info_data, needed);
124 if (!ptr)
125 return -1;
126
127 *info_data = ptr;
128 *info_data_sz = needed;
129 }
130 ptr = *info_data;
131
132 if (mode == DUMP_JITED) {
133 holder.jited_prog_insns = ptr_to_u64(ptr);
134 ptr += holder.jited_prog_len;
135 } else {
136 holder.xlated_prog_insns = ptr_to_u64(ptr);
137 ptr += holder.xlated_prog_len;
138 }
139
140 holder.jited_ksyms = ptr_to_u64(ptr);
141 ptr += holder.nr_jited_ksyms * sizeof(__u64);
142
143 holder.jited_func_lens = ptr_to_u64(ptr);
144 ptr += holder.nr_jited_func_lens * sizeof(__u32);
145
146 holder.func_info = ptr_to_u64(ptr);
147 ptr += holder.nr_func_info * holder.func_info_rec_size;
148
149 holder.line_info = ptr_to_u64(ptr);
150 ptr += holder.nr_line_info * holder.line_info_rec_size;
151
152 holder.jited_line_info = ptr_to_u64(ptr);
153 ptr += holder.nr_jited_line_info * holder.jited_line_info_rec_size;
154
155 *info = holder;
156 return 0;
157}
158
159static void print_boot_time(__u64 nsecs, char *buf, unsigned int size)
160{
161 struct timespec real_time_ts, boot_time_ts;
162 time_t wallclock_secs;
163 struct tm load_tm;
164
165 buf[--size] = '\0';
166
167 if (clock_gettime(CLOCK_REALTIME, &real_time_ts) ||
168 clock_gettime(CLOCK_BOOTTIME, &boot_time_ts)) {
169 perror("Can't read clocks");
170 snprintf(buf, size, "%llu", nsecs / 1000000000);
171 return;
172 }
173
174 wallclock_secs = (real_time_ts.tv_sec - boot_time_ts.tv_sec) +
175 (real_time_ts.tv_nsec - boot_time_ts.tv_nsec + nsecs) /
176 1000000000;
177
178
179 if (!localtime_r(&wallclock_secs, &load_tm)) {
180 snprintf(buf, size, "%llu", nsecs / 1000000000);
181 return;
182 }
183
184 if (json_output)
185 strftime(buf, size, "%s", &load_tm);
186 else
187 strftime(buf, size, "%FT%T%z", &load_tm);
188}
189
190static void show_prog_maps(int fd, __u32 num_maps)
191{
192 struct bpf_prog_info info = {};
193 __u32 len = sizeof(info);
194 __u32 map_ids[num_maps];
195 unsigned int i;
196 int err;
197
198 info.nr_map_ids = num_maps;
199 info.map_ids = ptr_to_u64(map_ids);
200
201 err = bpf_obj_get_info_by_fd(fd, &info, &len);
202 if (err || !info.nr_map_ids)
203 return;
204
205 if (json_output) {
206 jsonw_name(json_wtr, "map_ids");
207 jsonw_start_array(json_wtr);
208 for (i = 0; i < info.nr_map_ids; i++)
209 jsonw_uint(json_wtr, map_ids[i]);
210 jsonw_end_array(json_wtr);
211 } else {
212 printf(" map_ids ");
213 for (i = 0; i < info.nr_map_ids; i++)
214 printf("%u%s", map_ids[i],
215 i == info.nr_map_ids - 1 ? "" : ",");
216 }
217}
218
219static void *find_metadata(int prog_fd, struct bpf_map_info *map_info)
220{
221 struct bpf_prog_info prog_info;
222 __u32 prog_info_len;
223 __u32 map_info_len;
224 void *value = NULL;
225 __u32 *map_ids;
226 int nr_maps;
227 int key = 0;
228 int map_fd;
229 int ret;
230 __u32 i;
231
232 memset(&prog_info, 0, sizeof(prog_info));
233 prog_info_len = sizeof(prog_info);
234 ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
235 if (ret)
236 return NULL;
237
238 if (!prog_info.nr_map_ids)
239 return NULL;
240
241 map_ids = calloc(prog_info.nr_map_ids, sizeof(__u32));
242 if (!map_ids)
243 return NULL;
244
245 nr_maps = prog_info.nr_map_ids;
246 memset(&prog_info, 0, sizeof(prog_info));
247 prog_info.nr_map_ids = nr_maps;
248 prog_info.map_ids = ptr_to_u64(map_ids);
249 prog_info_len = sizeof(prog_info);
250
251 ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
252 if (ret)
253 goto free_map_ids;
254
255 for (i = 0; i < prog_info.nr_map_ids; i++) {
256 map_fd = bpf_map_get_fd_by_id(map_ids[i]);
257 if (map_fd < 0)
258 goto free_map_ids;
259
260 memset(map_info, 0, sizeof(*map_info));
261 map_info_len = sizeof(*map_info);
262 ret = bpf_obj_get_info_by_fd(map_fd, map_info, &map_info_len);
263 if (ret < 0) {
264 close(map_fd);
265 goto free_map_ids;
266 }
267
268 if (map_info->type != BPF_MAP_TYPE_ARRAY ||
269 map_info->key_size != sizeof(int) ||
270 map_info->max_entries != 1 ||
271 !map_info->btf_value_type_id ||
272 !strstr(map_info->name, ".rodata")) {
273 close(map_fd);
274 continue;
275 }
276
277 value = malloc(map_info->value_size);
278 if (!value) {
279 close(map_fd);
280 goto free_map_ids;
281 }
282
283 if (bpf_map_lookup_elem(map_fd, &key, value)) {
284 close(map_fd);
285 free(value);
286 value = NULL;
287 goto free_map_ids;
288 }
289
290 close(map_fd);
291 break;
292 }
293
294free_map_ids:
295 free(map_ids);
296 return value;
297}
298
299static bool has_metadata_prefix(const char *s)
300{
301 return strncmp(s, BPF_METADATA_PREFIX, BPF_METADATA_PREFIX_LEN) == 0;
302}
303
304static void show_prog_metadata(int fd, __u32 num_maps)
305{
306 const struct btf_type *t_datasec, *t_var;
307 struct bpf_map_info map_info;
308 struct btf_var_secinfo *vsi;
309 bool printed_header = false;
310 unsigned int i, vlen;
311 void *value = NULL;
312 const char *name;
313 struct btf *btf;
314 int err;
315
316 if (!num_maps)
317 return;
318
319 memset(&map_info, 0, sizeof(map_info));
320 value = find_metadata(fd, &map_info);
321 if (!value)
322 return;
323
324 btf = btf__load_from_kernel_by_id(map_info.btf_id);
325 if (!btf)
326 goto out_free;
327
328 t_datasec = btf__type_by_id(btf, map_info.btf_value_type_id);
329 if (!btf_is_datasec(t_datasec))
330 goto out_free;
331
332 vlen = btf_vlen(t_datasec);
333 vsi = btf_var_secinfos(t_datasec);
334
335 /* We don't proceed to check the kinds of the elements of the DATASEC.
336 * The verifier enforces them to be BTF_KIND_VAR.
337 */
338
339 if (json_output) {
340 struct btf_dumper d = {
341 .btf = btf,
342 .jw = json_wtr,
343 .is_plain_text = false,
344 };
345
346 for (i = 0; i < vlen; i++, vsi++) {
347 t_var = btf__type_by_id(btf, vsi->type);
348 name = btf__name_by_offset(btf, t_var->name_off);
349
350 if (!has_metadata_prefix(name))
351 continue;
352
353 if (!printed_header) {
354 jsonw_name(json_wtr, "metadata");
355 jsonw_start_object(json_wtr);
356 printed_header = true;
357 }
358
359 jsonw_name(json_wtr, name + BPF_METADATA_PREFIX_LEN);
360 err = btf_dumper_type(&d, t_var->type, value + vsi->offset);
361 if (err) {
362 p_err("btf dump failed: %d", err);
363 break;
364 }
365 }
366 if (printed_header)
367 jsonw_end_object(json_wtr);
368 } else {
369 json_writer_t *btf_wtr;
370 struct btf_dumper d = {
371 .btf = btf,
372 .is_plain_text = true,
373 };
374
375 for (i = 0; i < vlen; i++, vsi++) {
376 t_var = btf__type_by_id(btf, vsi->type);
377 name = btf__name_by_offset(btf, t_var->name_off);
378
379 if (!has_metadata_prefix(name))
380 continue;
381
382 if (!printed_header) {
383 printf("\tmetadata:");
384
385 btf_wtr = jsonw_new(stdout);
386 if (!btf_wtr) {
387 p_err("jsonw alloc failed");
388 goto out_free;
389 }
390 d.jw = btf_wtr,
391
392 printed_header = true;
393 }
394
395 printf("\n\t\t%s = ", name + BPF_METADATA_PREFIX_LEN);
396
397 jsonw_reset(btf_wtr);
398 err = btf_dumper_type(&d, t_var->type, value + vsi->offset);
399 if (err) {
400 p_err("btf dump failed: %d", err);
401 break;
402 }
403 }
404 if (printed_header)
405 jsonw_destroy(&btf_wtr);
406 }
407
408out_free:
409 btf__free(btf);
410 free(value);
411}
412
413static void print_prog_header_json(struct bpf_prog_info *info, int fd)
414{
415 const char *prog_type_str;
416 char prog_name[MAX_PROG_FULL_NAME];
417
418 jsonw_uint_field(json_wtr, "id", info->id);
419 prog_type_str = libbpf_bpf_prog_type_str(info->type);
420
421 if (prog_type_str)
422 jsonw_string_field(json_wtr, "type", prog_type_str);
423 else
424 jsonw_uint_field(json_wtr, "type", info->type);
425
426 if (*info->name) {
427 get_prog_full_name(info, fd, prog_name, sizeof(prog_name));
428 jsonw_string_field(json_wtr, "name", prog_name);
429 }
430
431 jsonw_name(json_wtr, "tag");
432 jsonw_printf(json_wtr, "\"" BPF_TAG_FMT "\"",
433 info->tag[0], info->tag[1], info->tag[2], info->tag[3],
434 info->tag[4], info->tag[5], info->tag[6], info->tag[7]);
435
436 jsonw_bool_field(json_wtr, "gpl_compatible", info->gpl_compatible);
437 if (info->run_time_ns) {
438 jsonw_uint_field(json_wtr, "run_time_ns", info->run_time_ns);
439 jsonw_uint_field(json_wtr, "run_cnt", info->run_cnt);
440 }
441 if (info->recursion_misses)
442 jsonw_uint_field(json_wtr, "recursion_misses", info->recursion_misses);
443}
444
445static void print_prog_json(struct bpf_prog_info *info, int fd)
446{
447 char *memlock;
448
449 jsonw_start_object(json_wtr);
450 print_prog_header_json(info, fd);
451 print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);
452
453 if (info->load_time) {
454 char buf[32];
455
456 print_boot_time(info->load_time, buf, sizeof(buf));
457
458 /* Piggy back on load_time, since 0 uid is a valid one */
459 jsonw_name(json_wtr, "loaded_at");
460 jsonw_printf(json_wtr, "%s", buf);
461 jsonw_uint_field(json_wtr, "uid", info->created_by_uid);
462 }
463
464 jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len);
465
466 if (info->jited_prog_len) {
467 jsonw_bool_field(json_wtr, "jited", true);
468 jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len);
469 } else {
470 jsonw_bool_field(json_wtr, "jited", false);
471 }
472
473 memlock = get_fdinfo(fd, "memlock");
474 if (memlock)
475 jsonw_int_field(json_wtr, "bytes_memlock", atoll(memlock));
476 free(memlock);
477
478 if (info->nr_map_ids)
479 show_prog_maps(fd, info->nr_map_ids);
480
481 if (info->btf_id)
482 jsonw_int_field(json_wtr, "btf_id", info->btf_id);
483
484 if (!hashmap__empty(prog_table)) {
485 struct hashmap_entry *entry;
486
487 jsonw_name(json_wtr, "pinned");
488 jsonw_start_array(json_wtr);
489 hashmap__for_each_key_entry(prog_table, entry, info->id)
490 jsonw_string(json_wtr, entry->pvalue);
491 jsonw_end_array(json_wtr);
492 }
493
494 emit_obj_refs_json(refs_table, info->id, json_wtr);
495
496 show_prog_metadata(fd, info->nr_map_ids);
497
498 jsonw_end_object(json_wtr);
499}
500
501static void print_prog_header_plain(struct bpf_prog_info *info, int fd)
502{
503 const char *prog_type_str;
504 char prog_name[MAX_PROG_FULL_NAME];
505
506 printf("%u: ", info->id);
507 prog_type_str = libbpf_bpf_prog_type_str(info->type);
508 if (prog_type_str)
509 printf("%s ", prog_type_str);
510 else
511 printf("type %u ", info->type);
512
513 if (*info->name) {
514 get_prog_full_name(info, fd, prog_name, sizeof(prog_name));
515 printf("name %s ", prog_name);
516 }
517
518 printf("tag ");
519 fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");
520 print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
521 printf("%s", info->gpl_compatible ? " gpl" : "");
522 if (info->run_time_ns)
523 printf(" run_time_ns %lld run_cnt %lld",
524 info->run_time_ns, info->run_cnt);
525 if (info->recursion_misses)
526 printf(" recursion_misses %lld", info->recursion_misses);
527 printf("\n");
528}
529
530static void print_prog_plain(struct bpf_prog_info *info, int fd)
531{
532 char *memlock;
533
534 print_prog_header_plain(info, fd);
535
536 if (info->load_time) {
537 char buf[32];
538
539 print_boot_time(info->load_time, buf, sizeof(buf));
540
541 /* Piggy back on load_time, since 0 uid is a valid one */
542 printf("\tloaded_at %s uid %u\n", buf, info->created_by_uid);
543 }
544
545 printf("\txlated %uB", info->xlated_prog_len);
546
547 if (info->jited_prog_len)
548 printf(" jited %uB", info->jited_prog_len);
549 else
550 printf(" not jited");
551
552 memlock = get_fdinfo(fd, "memlock");
553 if (memlock)
554 printf(" memlock %sB", memlock);
555 free(memlock);
556
557 if (info->nr_map_ids)
558 show_prog_maps(fd, info->nr_map_ids);
559
560 if (!hashmap__empty(prog_table)) {
561 struct hashmap_entry *entry;
562
563 hashmap__for_each_key_entry(prog_table, entry, info->id)
564 printf("\n\tpinned %s", (char *)entry->pvalue);
565 }
566
567 if (info->btf_id)
568 printf("\n\tbtf_id %d", info->btf_id);
569
570 emit_obj_refs_plain(refs_table, info->id, "\n\tpids ");
571
572 printf("\n");
573
574 show_prog_metadata(fd, info->nr_map_ids);
575}
576
577static int show_prog(int fd)
578{
579 struct bpf_prog_info info = {};
580 __u32 len = sizeof(info);
581 int err;
582
583 err = bpf_obj_get_info_by_fd(fd, &info, &len);
584 if (err) {
585 p_err("can't get prog info: %s", strerror(errno));
586 return -1;
587 }
588
589 if (json_output)
590 print_prog_json(&info, fd);
591 else
592 print_prog_plain(&info, fd);
593
594 return 0;
595}
596
597static int do_show_subset(int argc, char **argv)
598{
599 int *fds = NULL;
600 int nb_fds, i;
601 int err = -1;
602
603 fds = malloc(sizeof(int));
604 if (!fds) {
605 p_err("mem alloc failed");
606 return -1;
607 }
608 nb_fds = prog_parse_fds(&argc, &argv, &fds);
609 if (nb_fds < 1)
610 goto exit_free;
611
612 if (json_output && nb_fds > 1)
613 jsonw_start_array(json_wtr); /* root array */
614 for (i = 0; i < nb_fds; i++) {
615 err = show_prog(fds[i]);
616 if (err) {
617 for (; i < nb_fds; i++)
618 close(fds[i]);
619 break;
620 }
621 close(fds[i]);
622 }
623 if (json_output && nb_fds > 1)
624 jsonw_end_array(json_wtr); /* root array */
625
626exit_free:
627 free(fds);
628 return err;
629}
630
631static int do_show(int argc, char **argv)
632{
633 __u32 id = 0;
634 int err;
635 int fd;
636
637 if (show_pinned) {
638 prog_table = hashmap__new(hash_fn_for_key_as_id,
639 equal_fn_for_key_as_id, NULL);
640 if (IS_ERR(prog_table)) {
641 p_err("failed to create hashmap for pinned paths");
642 return -1;
643 }
644 build_pinned_obj_table(prog_table, BPF_OBJ_PROG);
645 }
646 build_obj_refs_table(&refs_table, BPF_OBJ_PROG);
647
648 if (argc == 2)
649 return do_show_subset(argc, argv);
650
651 if (argc)
652 return BAD_ARG();
653
654 if (json_output)
655 jsonw_start_array(json_wtr);
656 while (true) {
657 err = bpf_prog_get_next_id(id, &id);
658 if (err) {
659 if (errno == ENOENT) {
660 err = 0;
661 break;
662 }
663 p_err("can't get next program: %s%s", strerror(errno),
664 errno == EINVAL ? " -- kernel too old?" : "");
665 err = -1;
666 break;
667 }
668
669 fd = bpf_prog_get_fd_by_id(id);
670 if (fd < 0) {
671 if (errno == ENOENT)
672 continue;
673 p_err("can't get prog by id (%u): %s",
674 id, strerror(errno));
675 err = -1;
676 break;
677 }
678
679 err = show_prog(fd);
680 close(fd);
681 if (err)
682 break;
683 }
684
685 if (json_output)
686 jsonw_end_array(json_wtr);
687
688 delete_obj_refs_table(refs_table);
689
690 if (show_pinned)
691 delete_pinned_obj_table(prog_table);
692
693 return err;
694}
695
696static int
697prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
698 char *filepath, bool opcodes, bool visual, bool linum)
699{
700 struct bpf_prog_linfo *prog_linfo = NULL;
701 const char *disasm_opt = NULL;
702 struct dump_data dd = {};
703 void *func_info = NULL;
704 struct btf *btf = NULL;
705 char func_sig[1024];
706 unsigned char *buf;
707 __u32 member_len;
708 int fd, err = -1;
709 ssize_t n;
710
711 if (mode == DUMP_JITED) {
712 if (info->jited_prog_len == 0 || !info->jited_prog_insns) {
713 p_info("no instructions returned");
714 return -1;
715 }
716 buf = u64_to_ptr(info->jited_prog_insns);
717 member_len = info->jited_prog_len;
718 } else { /* DUMP_XLATED */
719 if (info->xlated_prog_len == 0 || !info->xlated_prog_insns) {
720 p_err("error retrieving insn dump: kernel.kptr_restrict set?");
721 return -1;
722 }
723 buf = u64_to_ptr(info->xlated_prog_insns);
724 member_len = info->xlated_prog_len;
725 }
726
727 if (info->btf_id) {
728 btf = btf__load_from_kernel_by_id(info->btf_id);
729 if (!btf) {
730 p_err("failed to get btf");
731 return -1;
732 }
733 }
734
735 func_info = u64_to_ptr(info->func_info);
736
737 if (info->nr_line_info) {
738 prog_linfo = bpf_prog_linfo__new(info);
739 if (!prog_linfo)
740 p_info("error in processing bpf_line_info. continue without it.");
741 }
742
743 if (filepath) {
744 fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
745 if (fd < 0) {
746 p_err("can't open file %s: %s", filepath,
747 strerror(errno));
748 goto exit_free;
749 }
750
751 n = write(fd, buf, member_len);
752 close(fd);
753 if (n != (ssize_t)member_len) {
754 p_err("error writing output file: %s",
755 n < 0 ? strerror(errno) : "short write");
756 goto exit_free;
757 }
758
759 if (json_output)
760 jsonw_null(json_wtr);
761 } else if (mode == DUMP_JITED) {
762 const char *name = NULL;
763
764 if (info->ifindex) {
765 name = ifindex_to_arch(info->ifindex, info->netns_dev,
766 info->netns_ino, &disasm_opt);
767 if (!name)
768 goto exit_free;
769 }
770
771 if (info->nr_jited_func_lens && info->jited_func_lens) {
772 struct kernel_sym *sym = NULL;
773 struct bpf_func_info *record;
774 char sym_name[SYM_MAX_NAME];
775 unsigned char *img = buf;
776 __u64 *ksyms = NULL;
777 __u32 *lens;
778 __u32 i;
779 if (info->nr_jited_ksyms) {
780 kernel_syms_load(&dd);
781 ksyms = u64_to_ptr(info->jited_ksyms);
782 }
783
784 if (json_output)
785 jsonw_start_array(json_wtr);
786
787 lens = u64_to_ptr(info->jited_func_lens);
788 for (i = 0; i < info->nr_jited_func_lens; i++) {
789 if (ksyms) {
790 sym = kernel_syms_search(&dd, ksyms[i]);
791 if (sym)
792 sprintf(sym_name, "%s", sym->name);
793 else
794 sprintf(sym_name, "0x%016llx", ksyms[i]);
795 } else {
796 strcpy(sym_name, "unknown");
797 }
798
799 if (func_info) {
800 record = func_info + i * info->func_info_rec_size;
801 btf_dumper_type_only(btf, record->type_id,
802 func_sig,
803 sizeof(func_sig));
804 }
805
806 if (json_output) {
807 jsonw_start_object(json_wtr);
808 if (func_info && func_sig[0] != '\0') {
809 jsonw_name(json_wtr, "proto");
810 jsonw_string(json_wtr, func_sig);
811 }
812 jsonw_name(json_wtr, "name");
813 jsonw_string(json_wtr, sym_name);
814 jsonw_name(json_wtr, "insns");
815 } else {
816 if (func_info && func_sig[0] != '\0')
817 printf("%s:\n", func_sig);
818 printf("%s:\n", sym_name);
819 }
820
821 if (disasm_print_insn(img, lens[i], opcodes,
822 name, disasm_opt, btf,
823 prog_linfo, ksyms[i], i,
824 linum))
825 goto exit_free;
826
827 img += lens[i];
828
829 if (json_output)
830 jsonw_end_object(json_wtr);
831 else
832 printf("\n");
833 }
834
835 if (json_output)
836 jsonw_end_array(json_wtr);
837 } else {
838 if (disasm_print_insn(buf, member_len, opcodes, name,
839 disasm_opt, btf, NULL, 0, 0,
840 false))
841 goto exit_free;
842 }
843 } else if (visual) {
844 if (json_output)
845 jsonw_null(json_wtr);
846 else
847 dump_xlated_cfg(buf, member_len);
848 } else {
849 kernel_syms_load(&dd);
850 dd.nr_jited_ksyms = info->nr_jited_ksyms;
851 dd.jited_ksyms = u64_to_ptr(info->jited_ksyms);
852 dd.btf = btf;
853 dd.func_info = func_info;
854 dd.finfo_rec_size = info->func_info_rec_size;
855 dd.prog_linfo = prog_linfo;
856
857 if (json_output)
858 dump_xlated_json(&dd, buf, member_len, opcodes,
859 linum);
860 else
861 dump_xlated_plain(&dd, buf, member_len, opcodes,
862 linum);
863 kernel_syms_destroy(&dd);
864 }
865
866 err = 0;
867
868exit_free:
869 btf__free(btf);
870 bpf_prog_linfo__free(prog_linfo);
871 return err;
872}
873
874static int do_dump(int argc, char **argv)
875{
876 struct bpf_prog_info info;
877 __u32 info_len = sizeof(info);
878 size_t info_data_sz = 0;
879 void *info_data = NULL;
880 char *filepath = NULL;
881 bool opcodes = false;
882 bool visual = false;
883 enum dump_mode mode;
884 bool linum = false;
885 int nb_fds, i = 0;
886 int *fds = NULL;
887 int err = -1;
888
889 if (is_prefix(*argv, "jited")) {
890 if (disasm_init())
891 return -1;
892 mode = DUMP_JITED;
893 } else if (is_prefix(*argv, "xlated")) {
894 mode = DUMP_XLATED;
895 } else {
896 p_err("expected 'xlated' or 'jited', got: %s", *argv);
897 return -1;
898 }
899 NEXT_ARG();
900
901 if (argc < 2)
902 usage();
903
904 fds = malloc(sizeof(int));
905 if (!fds) {
906 p_err("mem alloc failed");
907 return -1;
908 }
909 nb_fds = prog_parse_fds(&argc, &argv, &fds);
910 if (nb_fds < 1)
911 goto exit_free;
912
913 if (is_prefix(*argv, "file")) {
914 NEXT_ARG();
915 if (!argc) {
916 p_err("expected file path");
917 goto exit_close;
918 }
919 if (nb_fds > 1) {
920 p_err("several programs matched");
921 goto exit_close;
922 }
923
924 filepath = *argv;
925 NEXT_ARG();
926 } else if (is_prefix(*argv, "opcodes")) {
927 opcodes = true;
928 NEXT_ARG();
929 } else if (is_prefix(*argv, "visual")) {
930 if (nb_fds > 1) {
931 p_err("several programs matched");
932 goto exit_close;
933 }
934
935 visual = true;
936 NEXT_ARG();
937 } else if (is_prefix(*argv, "linum")) {
938 linum = true;
939 NEXT_ARG();
940 }
941
942 if (argc) {
943 usage();
944 goto exit_close;
945 }
946
947 if (json_output && nb_fds > 1)
948 jsonw_start_array(json_wtr); /* root array */
949 for (i = 0; i < nb_fds; i++) {
950 memset(&info, 0, sizeof(info));
951
952 err = bpf_obj_get_info_by_fd(fds[i], &info, &info_len);
953 if (err) {
954 p_err("can't get prog info: %s", strerror(errno));
955 break;
956 }
957
958 err = prep_prog_info(&info, mode, &info_data, &info_data_sz);
959 if (err) {
960 p_err("can't grow prog info_data");
961 break;
962 }
963
964 err = bpf_obj_get_info_by_fd(fds[i], &info, &info_len);
965 if (err) {
966 p_err("can't get prog info: %s", strerror(errno));
967 break;
968 }
969
970 if (json_output && nb_fds > 1) {
971 jsonw_start_object(json_wtr); /* prog object */
972 print_prog_header_json(&info, fds[i]);
973 jsonw_name(json_wtr, "insns");
974 } else if (nb_fds > 1) {
975 print_prog_header_plain(&info, fds[i]);
976 }
977
978 err = prog_dump(&info, mode, filepath, opcodes, visual, linum);
979
980 if (json_output && nb_fds > 1)
981 jsonw_end_object(json_wtr); /* prog object */
982 else if (i != nb_fds - 1 && nb_fds > 1)
983 printf("\n");
984
985 if (err)
986 break;
987 close(fds[i]);
988 }
989 if (json_output && nb_fds > 1)
990 jsonw_end_array(json_wtr); /* root array */
991
992exit_close:
993 for (; i < nb_fds; i++)
994 close(fds[i]);
995exit_free:
996 free(info_data);
997 free(fds);
998 return err;
999}
1000
1001static int do_pin(int argc, char **argv)
1002{
1003 int err;
1004
1005 err = do_pin_any(argc, argv, prog_parse_fd);
1006 if (!err && json_output)
1007 jsonw_null(json_wtr);
1008 return err;
1009}
1010
1011struct map_replace {
1012 int idx;
1013 int fd;
1014 char *name;
1015};
1016
1017static int map_replace_compar(const void *p1, const void *p2)
1018{
1019 const struct map_replace *a = p1, *b = p2;
1020
1021 return a->idx - b->idx;
1022}
1023
1024static int parse_attach_detach_args(int argc, char **argv, int *progfd,
1025 enum bpf_attach_type *attach_type,
1026 int *mapfd)
1027{
1028 if (!REQ_ARGS(3))
1029 return -EINVAL;
1030
1031 *progfd = prog_parse_fd(&argc, &argv);
1032 if (*progfd < 0)
1033 return *progfd;
1034
1035 *attach_type = parse_attach_type(*argv);
1036 if (*attach_type == __MAX_BPF_ATTACH_TYPE) {
1037 p_err("invalid attach/detach type");
1038 return -EINVAL;
1039 }
1040
1041 if (*attach_type == BPF_FLOW_DISSECTOR) {
1042 *mapfd = 0;
1043 return 0;
1044 }
1045
1046 NEXT_ARG();
1047 if (!REQ_ARGS(2))
1048 return -EINVAL;
1049
1050 *mapfd = map_parse_fd(&argc, &argv);
1051 if (*mapfd < 0)
1052 return *mapfd;
1053
1054 return 0;
1055}
1056
1057static int do_attach(int argc, char **argv)
1058{
1059 enum bpf_attach_type attach_type;
1060 int err, progfd;
1061 int mapfd;
1062
1063 err = parse_attach_detach_args(argc, argv,
1064 &progfd, &attach_type, &mapfd);
1065 if (err)
1066 return err;
1067
1068 err = bpf_prog_attach(progfd, mapfd, attach_type, 0);
1069 if (err) {
1070 p_err("failed prog attach to map");
1071 return -EINVAL;
1072 }
1073
1074 if (json_output)
1075 jsonw_null(json_wtr);
1076 return 0;
1077}
1078
1079static int do_detach(int argc, char **argv)
1080{
1081 enum bpf_attach_type attach_type;
1082 int err, progfd;
1083 int mapfd;
1084
1085 err = parse_attach_detach_args(argc, argv,
1086 &progfd, &attach_type, &mapfd);
1087 if (err)
1088 return err;
1089
1090 err = bpf_prog_detach2(progfd, mapfd, attach_type);
1091 if (err) {
1092 p_err("failed prog detach from map");
1093 return -EINVAL;
1094 }
1095
1096 if (json_output)
1097 jsonw_null(json_wtr);
1098 return 0;
1099}
1100
1101static int check_single_stdin(char *file_data_in, char *file_ctx_in)
1102{
1103 if (file_data_in && file_ctx_in &&
1104 !strcmp(file_data_in, "-") && !strcmp(file_ctx_in, "-")) {
1105 p_err("cannot use standard input for both data_in and ctx_in");
1106 return -1;
1107 }
1108
1109 return 0;
1110}
1111
1112static int get_run_data(const char *fname, void **data_ptr, unsigned int *size)
1113{
1114 size_t block_size = 256;
1115 size_t buf_size = block_size;
1116 size_t nb_read = 0;
1117 void *tmp;
1118 FILE *f;
1119
1120 if (!fname) {
1121 *data_ptr = NULL;
1122 *size = 0;
1123 return 0;
1124 }
1125
1126 if (!strcmp(fname, "-"))
1127 f = stdin;
1128 else
1129 f = fopen(fname, "r");
1130 if (!f) {
1131 p_err("failed to open %s: %s", fname, strerror(errno));
1132 return -1;
1133 }
1134
1135 *data_ptr = malloc(block_size);
1136 if (!*data_ptr) {
1137 p_err("failed to allocate memory for data_in/ctx_in: %s",
1138 strerror(errno));
1139 goto err_fclose;
1140 }
1141
1142 while ((nb_read += fread(*data_ptr + nb_read, 1, block_size, f))) {
1143 if (feof(f))
1144 break;
1145 if (ferror(f)) {
1146 p_err("failed to read data_in/ctx_in from %s: %s",
1147 fname, strerror(errno));
1148 goto err_free;
1149 }
1150 if (nb_read > buf_size - block_size) {
1151 if (buf_size == UINT32_MAX) {
1152 p_err("data_in/ctx_in is too long (max: %d)",
1153 UINT32_MAX);
1154 goto err_free;
1155 }
1156 /* No space for fread()-ing next chunk; realloc() */
1157 buf_size *= 2;
1158 tmp = realloc(*data_ptr, buf_size);
1159 if (!tmp) {
1160 p_err("failed to reallocate data_in/ctx_in: %s",
1161 strerror(errno));
1162 goto err_free;
1163 }
1164 *data_ptr = tmp;
1165 }
1166 }
1167 if (f != stdin)
1168 fclose(f);
1169
1170 *size = nb_read;
1171 return 0;
1172
1173err_free:
1174 free(*data_ptr);
1175 *data_ptr = NULL;
1176err_fclose:
1177 if (f != stdin)
1178 fclose(f);
1179 return -1;
1180}
1181
1182static void hex_print(void *data, unsigned int size, FILE *f)
1183{
1184 size_t i, j;
1185 char c;
1186
1187 for (i = 0; i < size; i += 16) {
1188 /* Row offset */
1189 fprintf(f, "%07zx\t", i);
1190
1191 /* Hexadecimal values */
1192 for (j = i; j < i + 16 && j < size; j++)
1193 fprintf(f, "%02x%s", *(uint8_t *)(data + j),
1194 j % 2 ? " " : "");
1195 for (; j < i + 16; j++)
1196 fprintf(f, " %s", j % 2 ? " " : "");
1197
1198 /* ASCII values (if relevant), '.' otherwise */
1199 fprintf(f, "| ");
1200 for (j = i; j < i + 16 && j < size; j++) {
1201 c = *(char *)(data + j);
1202 if (c < ' ' || c > '~')
1203 c = '.';
1204 fprintf(f, "%c%s", c, j == i + 7 ? " " : "");
1205 }
1206
1207 fprintf(f, "\n");
1208 }
1209}
1210
1211static int
1212print_run_output(void *data, unsigned int size, const char *fname,
1213 const char *json_key)
1214{
1215 size_t nb_written;
1216 FILE *f;
1217
1218 if (!fname)
1219 return 0;
1220
1221 if (!strcmp(fname, "-")) {
1222 f = stdout;
1223 if (json_output) {
1224 jsonw_name(json_wtr, json_key);
1225 print_data_json(data, size);
1226 } else {
1227 hex_print(data, size, f);
1228 }
1229 return 0;
1230 }
1231
1232 f = fopen(fname, "w");
1233 if (!f) {
1234 p_err("failed to open %s: %s", fname, strerror(errno));
1235 return -1;
1236 }
1237
1238 nb_written = fwrite(data, 1, size, f);
1239 fclose(f);
1240 if (nb_written != size) {
1241 p_err("failed to write output data/ctx: %s", strerror(errno));
1242 return -1;
1243 }
1244
1245 return 0;
1246}
1247
1248static int alloc_run_data(void **data_ptr, unsigned int size_out)
1249{
1250 *data_ptr = calloc(size_out, 1);
1251 if (!*data_ptr) {
1252 p_err("failed to allocate memory for output data/ctx: %s",
1253 strerror(errno));
1254 return -1;
1255 }
1256
1257 return 0;
1258}
1259
1260static int do_run(int argc, char **argv)
1261{
1262 char *data_fname_in = NULL, *data_fname_out = NULL;
1263 char *ctx_fname_in = NULL, *ctx_fname_out = NULL;
1264 const unsigned int default_size = SZ_32K;
1265 void *data_in = NULL, *data_out = NULL;
1266 void *ctx_in = NULL, *ctx_out = NULL;
1267 unsigned int repeat = 1;
1268 int fd, err;
1269 LIBBPF_OPTS(bpf_test_run_opts, test_attr);
1270
1271 if (!REQ_ARGS(4))
1272 return -1;
1273
1274 fd = prog_parse_fd(&argc, &argv);
1275 if (fd < 0)
1276 return -1;
1277
1278 while (argc) {
1279 if (detect_common_prefix(*argv, "data_in", "data_out",
1280 "data_size_out", NULL))
1281 return -1;
1282 if (detect_common_prefix(*argv, "ctx_in", "ctx_out",
1283 "ctx_size_out", NULL))
1284 return -1;
1285
1286 if (is_prefix(*argv, "data_in")) {
1287 NEXT_ARG();
1288 if (!REQ_ARGS(1))
1289 return -1;
1290
1291 data_fname_in = GET_ARG();
1292 if (check_single_stdin(data_fname_in, ctx_fname_in))
1293 return -1;
1294 } else if (is_prefix(*argv, "data_out")) {
1295 NEXT_ARG();
1296 if (!REQ_ARGS(1))
1297 return -1;
1298
1299 data_fname_out = GET_ARG();
1300 } else if (is_prefix(*argv, "data_size_out")) {
1301 char *endptr;
1302
1303 NEXT_ARG();
1304 if (!REQ_ARGS(1))
1305 return -1;
1306
1307 test_attr.data_size_out = strtoul(*argv, &endptr, 0);
1308 if (*endptr) {
1309 p_err("can't parse %s as output data size",
1310 *argv);
1311 return -1;
1312 }
1313 NEXT_ARG();
1314 } else if (is_prefix(*argv, "ctx_in")) {
1315 NEXT_ARG();
1316 if (!REQ_ARGS(1))
1317 return -1;
1318
1319 ctx_fname_in = GET_ARG();
1320 if (check_single_stdin(data_fname_in, ctx_fname_in))
1321 return -1;
1322 } else if (is_prefix(*argv, "ctx_out")) {
1323 NEXT_ARG();
1324 if (!REQ_ARGS(1))
1325 return -1;
1326
1327 ctx_fname_out = GET_ARG();
1328 } else if (is_prefix(*argv, "ctx_size_out")) {
1329 char *endptr;
1330
1331 NEXT_ARG();
1332 if (!REQ_ARGS(1))
1333 return -1;
1334
1335 test_attr.ctx_size_out = strtoul(*argv, &endptr, 0);
1336 if (*endptr) {
1337 p_err("can't parse %s as output context size",
1338 *argv);
1339 return -1;
1340 }
1341 NEXT_ARG();
1342 } else if (is_prefix(*argv, "repeat")) {
1343 char *endptr;
1344
1345 NEXT_ARG();
1346 if (!REQ_ARGS(1))
1347 return -1;
1348
1349 repeat = strtoul(*argv, &endptr, 0);
1350 if (*endptr) {
1351 p_err("can't parse %s as repeat number",
1352 *argv);
1353 return -1;
1354 }
1355 NEXT_ARG();
1356 } else {
1357 p_err("expected no more arguments, 'data_in', 'data_out', 'data_size_out', 'ctx_in', 'ctx_out', 'ctx_size_out' or 'repeat', got: '%s'?",
1358 *argv);
1359 return -1;
1360 }
1361 }
1362
1363 err = get_run_data(data_fname_in, &data_in, &test_attr.data_size_in);
1364 if (err)
1365 return -1;
1366
1367 if (data_in) {
1368 if (!test_attr.data_size_out)
1369 test_attr.data_size_out = default_size;
1370 err = alloc_run_data(&data_out, test_attr.data_size_out);
1371 if (err)
1372 goto free_data_in;
1373 }
1374
1375 err = get_run_data(ctx_fname_in, &ctx_in, &test_attr.ctx_size_in);
1376 if (err)
1377 goto free_data_out;
1378
1379 if (ctx_in) {
1380 if (!test_attr.ctx_size_out)
1381 test_attr.ctx_size_out = default_size;
1382 err = alloc_run_data(&ctx_out, test_attr.ctx_size_out);
1383 if (err)
1384 goto free_ctx_in;
1385 }
1386
1387 test_attr.repeat = repeat;
1388 test_attr.data_in = data_in;
1389 test_attr.data_out = data_out;
1390 test_attr.ctx_in = ctx_in;
1391 test_attr.ctx_out = ctx_out;
1392
1393 err = bpf_prog_test_run_opts(fd, &test_attr);
1394 if (err) {
1395 p_err("failed to run program: %s", strerror(errno));
1396 goto free_ctx_out;
1397 }
1398
1399 err = 0;
1400
1401 if (json_output)
1402 jsonw_start_object(json_wtr); /* root */
1403
1404 /* Do not exit on errors occurring when printing output data/context,
1405 * we still want to print return value and duration for program run.
1406 */
1407 if (test_attr.data_size_out)
1408 err += print_run_output(test_attr.data_out,
1409 test_attr.data_size_out,
1410 data_fname_out, "data_out");
1411 if (test_attr.ctx_size_out)
1412 err += print_run_output(test_attr.ctx_out,
1413 test_attr.ctx_size_out,
1414 ctx_fname_out, "ctx_out");
1415
1416 if (json_output) {
1417 jsonw_uint_field(json_wtr, "retval", test_attr.retval);
1418 jsonw_uint_field(json_wtr, "duration", test_attr.duration);
1419 jsonw_end_object(json_wtr); /* root */
1420 } else {
1421 fprintf(stdout, "Return value: %u, duration%s: %uns\n",
1422 test_attr.retval,
1423 repeat > 1 ? " (average)" : "", test_attr.duration);
1424 }
1425
1426free_ctx_out:
1427 free(ctx_out);
1428free_ctx_in:
1429 free(ctx_in);
1430free_data_out:
1431 free(data_out);
1432free_data_in:
1433 free(data_in);
1434
1435 return err;
1436}
1437
1438static int
1439get_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type,
1440 enum bpf_attach_type *expected_attach_type)
1441{
1442 libbpf_print_fn_t print_backup;
1443 int ret;
1444
1445 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
1446 if (!ret)
1447 return ret;
1448
1449 /* libbpf_prog_type_by_name() failed, let's re-run with debug level */
1450 print_backup = libbpf_set_print(print_all_levels);
1451 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
1452 libbpf_set_print(print_backup);
1453
1454 return ret;
1455}
1456
1457static int
1458auto_attach_program(struct bpf_program *prog, const char *path)
1459{
1460 struct bpf_link *link;
1461 int err;
1462
1463 link = bpf_program__attach(prog);
1464 if (!link) {
1465 p_info("Program %s does not support autoattach, falling back to pinning",
1466 bpf_program__name(prog));
1467 return bpf_obj_pin(bpf_program__fd(prog), path);
1468 }
1469
1470 err = bpf_link__pin(link, path);
1471 bpf_link__destroy(link);
1472 return err;
1473}
1474
1475static int pathname_concat(char *buf, size_t buf_sz, const char *path, const char *name)
1476{
1477 int len;
1478
1479 len = snprintf(buf, buf_sz, "%s/%s", path, name);
1480 if (len < 0)
1481 return -EINVAL;
1482 if ((size_t)len >= buf_sz)
1483 return -ENAMETOOLONG;
1484
1485 return 0;
1486}
1487
1488static int
1489auto_attach_programs(struct bpf_object *obj, const char *path)
1490{
1491 struct bpf_program *prog;
1492 char buf[PATH_MAX];
1493 int err;
1494
1495 bpf_object__for_each_program(prog, obj) {
1496 err = pathname_concat(buf, sizeof(buf), path, bpf_program__name(prog));
1497 if (err)
1498 goto err_unpin_programs;
1499
1500 err = auto_attach_program(prog, buf);
1501 if (err)
1502 goto err_unpin_programs;
1503 }
1504
1505 return 0;
1506
1507err_unpin_programs:
1508 while ((prog = bpf_object__prev_program(obj, prog))) {
1509 if (pathname_concat(buf, sizeof(buf), path, bpf_program__name(prog)))
1510 continue;
1511
1512 bpf_program__unpin(prog, buf);
1513 }
1514
1515 return err;
1516}
1517
1518static int load_with_options(int argc, char **argv, bool first_prog_only)
1519{
1520 enum bpf_prog_type common_prog_type = BPF_PROG_TYPE_UNSPEC;
1521 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts,
1522 .relaxed_maps = relaxed_maps,
1523 );
1524 enum bpf_attach_type expected_attach_type;
1525 struct map_replace *map_replace = NULL;
1526 struct bpf_program *prog = NULL, *pos;
1527 unsigned int old_map_fds = 0;
1528 const char *pinmaps = NULL;
1529 bool auto_attach = false;
1530 struct bpf_object *obj;
1531 struct bpf_map *map;
1532 const char *pinfile;
1533 unsigned int i, j;
1534 __u32 ifindex = 0;
1535 const char *file;
1536 int idx, err;
1537
1538
1539 if (!REQ_ARGS(2))
1540 return -1;
1541 file = GET_ARG();
1542 pinfile = GET_ARG();
1543
1544 while (argc) {
1545 if (is_prefix(*argv, "type")) {
1546 NEXT_ARG();
1547
1548 if (common_prog_type != BPF_PROG_TYPE_UNSPEC) {
1549 p_err("program type already specified");
1550 goto err_free_reuse_maps;
1551 }
1552 if (!REQ_ARGS(1))
1553 goto err_free_reuse_maps;
1554
1555 err = libbpf_prog_type_by_name(*argv, &common_prog_type,
1556 &expected_attach_type);
1557 if (err < 0) {
1558 /* Put a '/' at the end of type to appease libbpf */
1559 char *type = malloc(strlen(*argv) + 2);
1560
1561 if (!type) {
1562 p_err("mem alloc failed");
1563 goto err_free_reuse_maps;
1564 }
1565 *type = 0;
1566 strcat(type, *argv);
1567 strcat(type, "/");
1568
1569 err = get_prog_type_by_name(type, &common_prog_type,
1570 &expected_attach_type);
1571 free(type);
1572 if (err < 0)
1573 goto err_free_reuse_maps;
1574 }
1575
1576 NEXT_ARG();
1577 } else if (is_prefix(*argv, "map")) {
1578 void *new_map_replace;
1579 char *endptr, *name;
1580 int fd;
1581
1582 NEXT_ARG();
1583
1584 if (!REQ_ARGS(4))
1585 goto err_free_reuse_maps;
1586
1587 if (is_prefix(*argv, "idx")) {
1588 NEXT_ARG();
1589
1590 idx = strtoul(*argv, &endptr, 0);
1591 if (*endptr) {
1592 p_err("can't parse %s as IDX", *argv);
1593 goto err_free_reuse_maps;
1594 }
1595 name = NULL;
1596 } else if (is_prefix(*argv, "name")) {
1597 NEXT_ARG();
1598
1599 name = *argv;
1600 idx = -1;
1601 } else {
1602 p_err("expected 'idx' or 'name', got: '%s'?",
1603 *argv);
1604 goto err_free_reuse_maps;
1605 }
1606 NEXT_ARG();
1607
1608 fd = map_parse_fd(&argc, &argv);
1609 if (fd < 0)
1610 goto err_free_reuse_maps;
1611
1612 new_map_replace = libbpf_reallocarray(map_replace,
1613 old_map_fds + 1,
1614 sizeof(*map_replace));
1615 if (!new_map_replace) {
1616 p_err("mem alloc failed");
1617 goto err_free_reuse_maps;
1618 }
1619 map_replace = new_map_replace;
1620
1621 map_replace[old_map_fds].idx = idx;
1622 map_replace[old_map_fds].name = name;
1623 map_replace[old_map_fds].fd = fd;
1624 old_map_fds++;
1625 } else if (is_prefix(*argv, "dev")) {
1626 NEXT_ARG();
1627
1628 if (ifindex) {
1629 p_err("offload device already specified");
1630 goto err_free_reuse_maps;
1631 }
1632 if (!REQ_ARGS(1))
1633 goto err_free_reuse_maps;
1634
1635 ifindex = if_nametoindex(*argv);
1636 if (!ifindex) {
1637 p_err("unrecognized netdevice '%s': %s",
1638 *argv, strerror(errno));
1639 goto err_free_reuse_maps;
1640 }
1641 NEXT_ARG();
1642 } else if (is_prefix(*argv, "pinmaps")) {
1643 NEXT_ARG();
1644
1645 if (!REQ_ARGS(1))
1646 goto err_free_reuse_maps;
1647
1648 pinmaps = GET_ARG();
1649 } else if (is_prefix(*argv, "autoattach")) {
1650 auto_attach = true;
1651 NEXT_ARG();
1652 } else {
1653 p_err("expected no more arguments, 'type', 'map' or 'dev', got: '%s'?",
1654 *argv);
1655 goto err_free_reuse_maps;
1656 }
1657 }
1658
1659 set_max_rlimit();
1660
1661 if (verifier_logs)
1662 /* log_level1 + log_level2 + stats, but not stable UAPI */
1663 open_opts.kernel_log_level = 1 + 2 + 4;
1664
1665 obj = bpf_object__open_file(file, &open_opts);
1666 if (!obj) {
1667 p_err("failed to open object file");
1668 goto err_free_reuse_maps;
1669 }
1670
1671 bpf_object__for_each_program(pos, obj) {
1672 enum bpf_prog_type prog_type = common_prog_type;
1673
1674 if (prog_type == BPF_PROG_TYPE_UNSPEC) {
1675 const char *sec_name = bpf_program__section_name(pos);
1676
1677 err = get_prog_type_by_name(sec_name, &prog_type,
1678 &expected_attach_type);
1679 if (err < 0)
1680 goto err_close_obj;
1681 }
1682
1683 bpf_program__set_ifindex(pos, ifindex);
1684 bpf_program__set_type(pos, prog_type);
1685 bpf_program__set_expected_attach_type(pos, expected_attach_type);
1686 }
1687
1688 qsort(map_replace, old_map_fds, sizeof(*map_replace),
1689 map_replace_compar);
1690
1691 /* After the sort maps by name will be first on the list, because they
1692 * have idx == -1. Resolve them.
1693 */
1694 j = 0;
1695 while (j < old_map_fds && map_replace[j].name) {
1696 i = 0;
1697 bpf_object__for_each_map(map, obj) {
1698 if (!strcmp(bpf_map__name(map), map_replace[j].name)) {
1699 map_replace[j].idx = i;
1700 break;
1701 }
1702 i++;
1703 }
1704 if (map_replace[j].idx == -1) {
1705 p_err("unable to find map '%s'", map_replace[j].name);
1706 goto err_close_obj;
1707 }
1708 j++;
1709 }
1710 /* Resort if any names were resolved */
1711 if (j)
1712 qsort(map_replace, old_map_fds, sizeof(*map_replace),
1713 map_replace_compar);
1714
1715 /* Set ifindex and name reuse */
1716 j = 0;
1717 idx = 0;
1718 bpf_object__for_each_map(map, obj) {
1719 if (bpf_map__type(map) != BPF_MAP_TYPE_PERF_EVENT_ARRAY)
1720 bpf_map__set_ifindex(map, ifindex);
1721
1722 if (j < old_map_fds && idx == map_replace[j].idx) {
1723 err = bpf_map__reuse_fd(map, map_replace[j++].fd);
1724 if (err) {
1725 p_err("unable to set up map reuse: %d", err);
1726 goto err_close_obj;
1727 }
1728
1729 /* Next reuse wants to apply to the same map */
1730 if (j < old_map_fds && map_replace[j].idx == idx) {
1731 p_err("replacement for map idx %d specified more than once",
1732 idx);
1733 goto err_close_obj;
1734 }
1735 }
1736
1737 idx++;
1738 }
1739 if (j < old_map_fds) {
1740 p_err("map idx '%d' not used", map_replace[j].idx);
1741 goto err_close_obj;
1742 }
1743
1744 err = bpf_object__load(obj);
1745 if (err) {
1746 p_err("failed to load object file");
1747 goto err_close_obj;
1748 }
1749
1750 err = mount_bpffs_for_pin(pinfile);
1751 if (err)
1752 goto err_close_obj;
1753
1754 if (first_prog_only) {
1755 prog = bpf_object__next_program(obj, NULL);
1756 if (!prog) {
1757 p_err("object file doesn't contain any bpf program");
1758 goto err_close_obj;
1759 }
1760
1761 if (auto_attach)
1762 err = auto_attach_program(prog, pinfile);
1763 else
1764 err = bpf_obj_pin(bpf_program__fd(prog), pinfile);
1765 if (err) {
1766 p_err("failed to pin program %s",
1767 bpf_program__section_name(prog));
1768 goto err_close_obj;
1769 }
1770 } else {
1771 if (auto_attach)
1772 err = auto_attach_programs(obj, pinfile);
1773 else
1774 err = bpf_object__pin_programs(obj, pinfile);
1775 if (err) {
1776 p_err("failed to pin all programs");
1777 goto err_close_obj;
1778 }
1779 }
1780
1781 if (pinmaps) {
1782 err = bpf_object__pin_maps(obj, pinmaps);
1783 if (err) {
1784 p_err("failed to pin all maps");
1785 goto err_unpin;
1786 }
1787 }
1788
1789 if (json_output)
1790 jsonw_null(json_wtr);
1791
1792 bpf_object__close(obj);
1793 for (i = 0; i < old_map_fds; i++)
1794 close(map_replace[i].fd);
1795 free(map_replace);
1796
1797 return 0;
1798
1799err_unpin:
1800 if (first_prog_only)
1801 unlink(pinfile);
1802 else
1803 bpf_object__unpin_programs(obj, pinfile);
1804err_close_obj:
1805 bpf_object__close(obj);
1806err_free_reuse_maps:
1807 for (i = 0; i < old_map_fds; i++)
1808 close(map_replace[i].fd);
1809 free(map_replace);
1810 return -1;
1811}
1812
1813static int count_open_fds(void)
1814{
1815 DIR *dp = opendir("/proc/self/fd");
1816 struct dirent *de;
1817 int cnt = -3;
1818
1819 if (!dp)
1820 return -1;
1821
1822 while ((de = readdir(dp)))
1823 cnt++;
1824
1825 closedir(dp);
1826 return cnt;
1827}
1828
1829static int try_loader(struct gen_loader_opts *gen)
1830{
1831 struct bpf_load_and_run_opts opts = {};
1832 struct bpf_loader_ctx *ctx;
1833 int ctx_sz = sizeof(*ctx) + 64 * max(sizeof(struct bpf_map_desc),
1834 sizeof(struct bpf_prog_desc));
1835 int log_buf_sz = (1u << 24) - 1;
1836 int err, fds_before, fd_delta;
1837 char *log_buf = NULL;
1838
1839 ctx = alloca(ctx_sz);
1840 memset(ctx, 0, ctx_sz);
1841 ctx->sz = ctx_sz;
1842 if (verifier_logs) {
1843 ctx->log_level = 1 + 2 + 4;
1844 ctx->log_size = log_buf_sz;
1845 log_buf = malloc(log_buf_sz);
1846 if (!log_buf)
1847 return -ENOMEM;
1848 ctx->log_buf = (long) log_buf;
1849 }
1850 opts.ctx = ctx;
1851 opts.data = gen->data;
1852 opts.data_sz = gen->data_sz;
1853 opts.insns = gen->insns;
1854 opts.insns_sz = gen->insns_sz;
1855 fds_before = count_open_fds();
1856 err = bpf_load_and_run(&opts);
1857 fd_delta = count_open_fds() - fds_before;
1858 if (err < 0 || verifier_logs) {
1859 fprintf(stderr, "err %d\n%s\n%s", err, opts.errstr, log_buf);
1860 if (fd_delta && err < 0)
1861 fprintf(stderr, "loader prog leaked %d FDs\n",
1862 fd_delta);
1863 }
1864 free(log_buf);
1865 return err;
1866}
1867
1868static int do_loader(int argc, char **argv)
1869{
1870 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts);
1871 DECLARE_LIBBPF_OPTS(gen_loader_opts, gen);
1872 struct bpf_object *obj;
1873 const char *file;
1874 int err = 0;
1875
1876 if (!REQ_ARGS(1))
1877 return -1;
1878 file = GET_ARG();
1879
1880 if (verifier_logs)
1881 /* log_level1 + log_level2 + stats, but not stable UAPI */
1882 open_opts.kernel_log_level = 1 + 2 + 4;
1883
1884 obj = bpf_object__open_file(file, &open_opts);
1885 if (!obj) {
1886 p_err("failed to open object file");
1887 goto err_close_obj;
1888 }
1889
1890 err = bpf_object__gen_loader(obj, &gen);
1891 if (err)
1892 goto err_close_obj;
1893
1894 err = bpf_object__load(obj);
1895 if (err) {
1896 p_err("failed to load object file");
1897 goto err_close_obj;
1898 }
1899
1900 if (verifier_logs) {
1901 struct dump_data dd = {};
1902
1903 kernel_syms_load(&dd);
1904 dump_xlated_plain(&dd, (void *)gen.insns, gen.insns_sz, false, false);
1905 kernel_syms_destroy(&dd);
1906 }
1907 err = try_loader(&gen);
1908err_close_obj:
1909 bpf_object__close(obj);
1910 return err;
1911}
1912
1913static int do_load(int argc, char **argv)
1914{
1915 if (use_loader)
1916 return do_loader(argc, argv);
1917 return load_with_options(argc, argv, true);
1918}
1919
1920static int do_loadall(int argc, char **argv)
1921{
1922 return load_with_options(argc, argv, false);
1923}
1924
1925#ifdef BPFTOOL_WITHOUT_SKELETONS
1926
1927static int do_profile(int argc, char **argv)
1928{
1929 p_err("bpftool prog profile command is not supported. Please build bpftool with clang >= 10.0.0");
1930 return 0;
1931}
1932
1933#else /* BPFTOOL_WITHOUT_SKELETONS */
1934
1935#include "profiler.skel.h"
1936
1937struct profile_metric {
1938 const char *name;
1939 struct bpf_perf_event_value val;
1940 struct perf_event_attr attr;
1941 bool selected;
1942
1943 /* calculate ratios like instructions per cycle */
1944 const int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */
1945 const char *ratio_desc;
1946 const float ratio_mul;
1947} metrics[] = {
1948 {
1949 .name = "cycles",
1950 .attr = {
1951 .type = PERF_TYPE_HARDWARE,
1952 .config = PERF_COUNT_HW_CPU_CYCLES,
1953 .exclude_user = 1,
1954 },
1955 },
1956 {
1957 .name = "instructions",
1958 .attr = {
1959 .type = PERF_TYPE_HARDWARE,
1960 .config = PERF_COUNT_HW_INSTRUCTIONS,
1961 .exclude_user = 1,
1962 },
1963 .ratio_metric = 1,
1964 .ratio_desc = "insns per cycle",
1965 .ratio_mul = 1.0,
1966 },
1967 {
1968 .name = "l1d_loads",
1969 .attr = {
1970 .type = PERF_TYPE_HW_CACHE,
1971 .config =
1972 PERF_COUNT_HW_CACHE_L1D |
1973 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1974 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
1975 .exclude_user = 1,
1976 },
1977 },
1978 {
1979 .name = "llc_misses",
1980 .attr = {
1981 .type = PERF_TYPE_HW_CACHE,
1982 .config =
1983 PERF_COUNT_HW_CACHE_LL |
1984 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1985 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
1986 .exclude_user = 1
1987 },
1988 .ratio_metric = 2,
1989 .ratio_desc = "LLC misses per million insns",
1990 .ratio_mul = 1e6,
1991 },
1992 {
1993 .name = "itlb_misses",
1994 .attr = {
1995 .type = PERF_TYPE_HW_CACHE,
1996 .config =
1997 PERF_COUNT_HW_CACHE_ITLB |
1998 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1999 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
2000 .exclude_user = 1
2001 },
2002 .ratio_metric = 2,
2003 .ratio_desc = "itlb misses per million insns",
2004 .ratio_mul = 1e6,
2005 },
2006 {
2007 .name = "dtlb_misses",
2008 .attr = {
2009 .type = PERF_TYPE_HW_CACHE,
2010 .config =
2011 PERF_COUNT_HW_CACHE_DTLB |
2012 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
2013 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
2014 .exclude_user = 1
2015 },
2016 .ratio_metric = 2,
2017 .ratio_desc = "dtlb misses per million insns",
2018 .ratio_mul = 1e6,
2019 },
2020};
2021
2022static __u64 profile_total_count;
2023
2024#define MAX_NUM_PROFILE_METRICS 4
2025
2026static int profile_parse_metrics(int argc, char **argv)
2027{
2028 unsigned int metric_cnt;
2029 int selected_cnt = 0;
2030 unsigned int i;
2031
2032 metric_cnt = ARRAY_SIZE(metrics);
2033
2034 while (argc > 0) {
2035 for (i = 0; i < metric_cnt; i++) {
2036 if (is_prefix(argv[0], metrics[i].name)) {
2037 if (!metrics[i].selected)
2038 selected_cnt++;
2039 metrics[i].selected = true;
2040 break;
2041 }
2042 }
2043 if (i == metric_cnt) {
2044 p_err("unknown metric %s", argv[0]);
2045 return -1;
2046 }
2047 NEXT_ARG();
2048 }
2049 if (selected_cnt > MAX_NUM_PROFILE_METRICS) {
2050 p_err("too many (%d) metrics, please specify no more than %d metrics at at time",
2051 selected_cnt, MAX_NUM_PROFILE_METRICS);
2052 return -1;
2053 }
2054 return selected_cnt;
2055}
2056
2057static void profile_read_values(struct profiler_bpf *obj)
2058{
2059 __u32 m, cpu, num_cpu = obj->rodata->num_cpu;
2060 int reading_map_fd, count_map_fd;
2061 __u64 counts[num_cpu];
2062 __u32 key = 0;
2063 int err;
2064
2065 reading_map_fd = bpf_map__fd(obj->maps.accum_readings);
2066 count_map_fd = bpf_map__fd(obj->maps.counts);
2067 if (reading_map_fd < 0 || count_map_fd < 0) {
2068 p_err("failed to get fd for map");
2069 return;
2070 }
2071
2072 err = bpf_map_lookup_elem(count_map_fd, &key, counts);
2073 if (err) {
2074 p_err("failed to read count_map: %s", strerror(errno));
2075 return;
2076 }
2077
2078 profile_total_count = 0;
2079 for (cpu = 0; cpu < num_cpu; cpu++)
2080 profile_total_count += counts[cpu];
2081
2082 for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2083 struct bpf_perf_event_value values[num_cpu];
2084
2085 if (!metrics[m].selected)
2086 continue;
2087
2088 err = bpf_map_lookup_elem(reading_map_fd, &key, values);
2089 if (err) {
2090 p_err("failed to read reading_map: %s",
2091 strerror(errno));
2092 return;
2093 }
2094 for (cpu = 0; cpu < num_cpu; cpu++) {
2095 metrics[m].val.counter += values[cpu].counter;
2096 metrics[m].val.enabled += values[cpu].enabled;
2097 metrics[m].val.running += values[cpu].running;
2098 }
2099 key++;
2100 }
2101}
2102
2103static void profile_print_readings_json(void)
2104{
2105 __u32 m;
2106
2107 jsonw_start_array(json_wtr);
2108 for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2109 if (!metrics[m].selected)
2110 continue;
2111 jsonw_start_object(json_wtr);
2112 jsonw_string_field(json_wtr, "metric", metrics[m].name);
2113 jsonw_lluint_field(json_wtr, "run_cnt", profile_total_count);
2114 jsonw_lluint_field(json_wtr, "value", metrics[m].val.counter);
2115 jsonw_lluint_field(json_wtr, "enabled", metrics[m].val.enabled);
2116 jsonw_lluint_field(json_wtr, "running", metrics[m].val.running);
2117
2118 jsonw_end_object(json_wtr);
2119 }
2120 jsonw_end_array(json_wtr);
2121}
2122
2123static void profile_print_readings_plain(void)
2124{
2125 __u32 m;
2126
2127 printf("\n%18llu %-20s\n", profile_total_count, "run_cnt");
2128 for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2129 struct bpf_perf_event_value *val = &metrics[m].val;
2130 int r;
2131
2132 if (!metrics[m].selected)
2133 continue;
2134 printf("%18llu %-20s", val->counter, metrics[m].name);
2135
2136 r = metrics[m].ratio_metric - 1;
2137 if (r >= 0 && metrics[r].selected &&
2138 metrics[r].val.counter > 0) {
2139 printf("# %8.2f %-30s",
2140 val->counter * metrics[m].ratio_mul /
2141 metrics[r].val.counter,
2142 metrics[m].ratio_desc);
2143 } else {
2144 printf("%-41s", "");
2145 }
2146
2147 if (val->enabled > val->running)
2148 printf("(%4.2f%%)",
2149 val->running * 100.0 / val->enabled);
2150 printf("\n");
2151 }
2152}
2153
2154static void profile_print_readings(void)
2155{
2156 if (json_output)
2157 profile_print_readings_json();
2158 else
2159 profile_print_readings_plain();
2160}
2161
2162static char *profile_target_name(int tgt_fd)
2163{
2164 struct bpf_func_info func_info;
2165 struct bpf_prog_info info = {};
2166 __u32 info_len = sizeof(info);
2167 const struct btf_type *t;
2168 __u32 func_info_rec_size;
2169 struct btf *btf = NULL;
2170 char *name = NULL;
2171 int err;
2172
2173 err = bpf_obj_get_info_by_fd(tgt_fd, &info, &info_len);
2174 if (err) {
2175 p_err("failed to bpf_obj_get_info_by_fd for prog FD %d", tgt_fd);
2176 goto out;
2177 }
2178
2179 if (info.btf_id == 0) {
2180 p_err("prog FD %d doesn't have valid btf", tgt_fd);
2181 goto out;
2182 }
2183
2184 func_info_rec_size = info.func_info_rec_size;
2185 if (info.nr_func_info == 0) {
2186 p_err("bpf_obj_get_info_by_fd for prog FD %d found 0 func_info", tgt_fd);
2187 goto out;
2188 }
2189
2190 memset(&info, 0, sizeof(info));
2191 info.nr_func_info = 1;
2192 info.func_info_rec_size = func_info_rec_size;
2193 info.func_info = ptr_to_u64(&func_info);
2194
2195 err = bpf_obj_get_info_by_fd(tgt_fd, &info, &info_len);
2196 if (err) {
2197 p_err("failed to get func_info for prog FD %d", tgt_fd);
2198 goto out;
2199 }
2200
2201 btf = btf__load_from_kernel_by_id(info.btf_id);
2202 if (!btf) {
2203 p_err("failed to load btf for prog FD %d", tgt_fd);
2204 goto out;
2205 }
2206
2207 t = btf__type_by_id(btf, func_info.type_id);
2208 if (!t) {
2209 p_err("btf %d doesn't have type %d",
2210 info.btf_id, func_info.type_id);
2211 goto out;
2212 }
2213 name = strdup(btf__name_by_offset(btf, t->name_off));
2214out:
2215 btf__free(btf);
2216 return name;
2217}
2218
2219static struct profiler_bpf *profile_obj;
2220static int profile_tgt_fd = -1;
2221static char *profile_tgt_name;
2222static int *profile_perf_events;
2223static int profile_perf_event_cnt;
2224
2225static void profile_close_perf_events(struct profiler_bpf *obj)
2226{
2227 int i;
2228
2229 for (i = profile_perf_event_cnt - 1; i >= 0; i--)
2230 close(profile_perf_events[i]);
2231
2232 free(profile_perf_events);
2233 profile_perf_event_cnt = 0;
2234}
2235
2236static int profile_open_perf_events(struct profiler_bpf *obj)
2237{
2238 unsigned int cpu, m;
2239 int map_fd, pmu_fd;
2240
2241 profile_perf_events = calloc(
2242 sizeof(int), obj->rodata->num_cpu * obj->rodata->num_metric);
2243 if (!profile_perf_events) {
2244 p_err("failed to allocate memory for perf_event array: %s",
2245 strerror(errno));
2246 return -1;
2247 }
2248 map_fd = bpf_map__fd(obj->maps.events);
2249 if (map_fd < 0) {
2250 p_err("failed to get fd for events map");
2251 return -1;
2252 }
2253
2254 for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2255 if (!metrics[m].selected)
2256 continue;
2257 for (cpu = 0; cpu < obj->rodata->num_cpu; cpu++) {
2258 pmu_fd = syscall(__NR_perf_event_open, &metrics[m].attr,
2259 -1/*pid*/, cpu, -1/*group_fd*/, 0);
2260 if (pmu_fd < 0 ||
2261 bpf_map_update_elem(map_fd, &profile_perf_event_cnt,
2262 &pmu_fd, BPF_ANY) ||
2263 ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0)) {
2264 p_err("failed to create event %s on cpu %d",
2265 metrics[m].name, cpu);
2266 return -1;
2267 }
2268 profile_perf_events[profile_perf_event_cnt++] = pmu_fd;
2269 }
2270 }
2271 return 0;
2272}
2273
2274static void profile_print_and_cleanup(void)
2275{
2276 profile_close_perf_events(profile_obj);
2277 profile_read_values(profile_obj);
2278 profile_print_readings();
2279 profiler_bpf__destroy(profile_obj);
2280
2281 close(profile_tgt_fd);
2282 free(profile_tgt_name);
2283}
2284
2285static void int_exit(int signo)
2286{
2287 profile_print_and_cleanup();
2288 exit(0);
2289}
2290
2291static int do_profile(int argc, char **argv)
2292{
2293 int num_metric, num_cpu, err = -1;
2294 struct bpf_program *prog;
2295 unsigned long duration;
2296 char *endptr;
2297
2298 /* we at least need two args for the prog and one metric */
2299 if (!REQ_ARGS(3))
2300 return -EINVAL;
2301
2302 /* parse target fd */
2303 profile_tgt_fd = prog_parse_fd(&argc, &argv);
2304 if (profile_tgt_fd < 0) {
2305 p_err("failed to parse fd");
2306 return -1;
2307 }
2308
2309 /* parse profiling optional duration */
2310 if (argc > 2 && is_prefix(argv[0], "duration")) {
2311 NEXT_ARG();
2312 duration = strtoul(*argv, &endptr, 0);
2313 if (*endptr)
2314 usage();
2315 NEXT_ARG();
2316 } else {
2317 duration = UINT_MAX;
2318 }
2319
2320 num_metric = profile_parse_metrics(argc, argv);
2321 if (num_metric <= 0)
2322 goto out;
2323
2324 num_cpu = libbpf_num_possible_cpus();
2325 if (num_cpu <= 0) {
2326 p_err("failed to identify number of CPUs");
2327 goto out;
2328 }
2329
2330 profile_obj = profiler_bpf__open();
2331 if (!profile_obj) {
2332 p_err("failed to open and/or load BPF object");
2333 goto out;
2334 }
2335
2336 profile_obj->rodata->num_cpu = num_cpu;
2337 profile_obj->rodata->num_metric = num_metric;
2338
2339 /* adjust map sizes */
2340 bpf_map__set_max_entries(profile_obj->maps.events, num_metric * num_cpu);
2341 bpf_map__set_max_entries(profile_obj->maps.fentry_readings, num_metric);
2342 bpf_map__set_max_entries(profile_obj->maps.accum_readings, num_metric);
2343 bpf_map__set_max_entries(profile_obj->maps.counts, 1);
2344
2345 /* change target name */
2346 profile_tgt_name = profile_target_name(profile_tgt_fd);
2347 if (!profile_tgt_name)
2348 goto out;
2349
2350 bpf_object__for_each_program(prog, profile_obj->obj) {
2351 err = bpf_program__set_attach_target(prog, profile_tgt_fd,
2352 profile_tgt_name);
2353 if (err) {
2354 p_err("failed to set attach target\n");
2355 goto out;
2356 }
2357 }
2358
2359 set_max_rlimit();
2360 err = profiler_bpf__load(profile_obj);
2361 if (err) {
2362 p_err("failed to load profile_obj");
2363 goto out;
2364 }
2365
2366 err = profile_open_perf_events(profile_obj);
2367 if (err)
2368 goto out;
2369
2370 err = profiler_bpf__attach(profile_obj);
2371 if (err) {
2372 p_err("failed to attach profile_obj");
2373 goto out;
2374 }
2375 signal(SIGINT, int_exit);
2376
2377 sleep(duration);
2378 profile_print_and_cleanup();
2379 return 0;
2380
2381out:
2382 profile_close_perf_events(profile_obj);
2383 if (profile_obj)
2384 profiler_bpf__destroy(profile_obj);
2385 close(profile_tgt_fd);
2386 free(profile_tgt_name);
2387 return err;
2388}
2389
2390#endif /* BPFTOOL_WITHOUT_SKELETONS */
2391
2392static int do_help(int argc, char **argv)
2393{
2394 if (json_output) {
2395 jsonw_null(json_wtr);
2396 return 0;
2397 }
2398
2399 fprintf(stderr,
2400 "Usage: %1$s %2$s { show | list } [PROG]\n"
2401 " %1$s %2$s dump xlated PROG [{ file FILE | opcodes | visual | linum }]\n"
2402 " %1$s %2$s dump jited PROG [{ file FILE | opcodes | linum }]\n"
2403 " %1$s %2$s pin PROG FILE\n"
2404 " %1$s %2$s { load | loadall } OBJ PATH \\\n"
2405 " [type TYPE] [dev NAME] \\\n"
2406 " [map { idx IDX | name NAME } MAP]\\\n"
2407 " [pinmaps MAP_DIR]\n"
2408 " [autoattach]\n"
2409 " %1$s %2$s attach PROG ATTACH_TYPE [MAP]\n"
2410 " %1$s %2$s detach PROG ATTACH_TYPE [MAP]\n"
2411 " %1$s %2$s run PROG \\\n"
2412 " data_in FILE \\\n"
2413 " [data_out FILE [data_size_out L]] \\\n"
2414 " [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n"
2415 " [repeat N]\n"
2416 " %1$s %2$s profile PROG [duration DURATION] METRICs\n"
2417 " %1$s %2$s tracelog\n"
2418 " %1$s %2$s help\n"
2419 "\n"
2420 " " HELP_SPEC_MAP "\n"
2421 " " HELP_SPEC_PROGRAM "\n"
2422 " TYPE := { socket | kprobe | kretprobe | classifier | action |\n"
2423 " tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n"
2424 " cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n"
2425 " lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n"
2426 " sk_reuseport | flow_dissector | cgroup/sysctl |\n"
2427 " cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"
2428 " cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"
2429 " cgroup/getpeername4 | cgroup/getpeername6 |\n"
2430 " cgroup/getsockname4 | cgroup/getsockname6 | cgroup/sendmsg4 |\n"
2431 " cgroup/sendmsg6 | cgroup/recvmsg4 | cgroup/recvmsg6 |\n"
2432 " cgroup/getsockopt | cgroup/setsockopt | cgroup/sock_release |\n"
2433 " struct_ops | fentry | fexit | freplace | sk_lookup }\n"
2434 " ATTACH_TYPE := { sk_msg_verdict | sk_skb_verdict | sk_skb_stream_verdict |\n"
2435 " sk_skb_stream_parser | flow_dissector }\n"
2436 " METRIC := { cycles | instructions | l1d_loads | llc_misses | itlb_misses | dtlb_misses }\n"
2437 " " HELP_SPEC_OPTIONS " |\n"
2438 " {-f|--bpffs} | {-m|--mapcompat} | {-n|--nomount} |\n"
2439 " {-L|--use-loader} }\n"
2440 "",
2441 bin_name, argv[-2]);
2442
2443 return 0;
2444}
2445
2446static const struct cmd cmds[] = {
2447 { "show", do_show },
2448 { "list", do_show },
2449 { "help", do_help },
2450 { "dump", do_dump },
2451 { "pin", do_pin },
2452 { "load", do_load },
2453 { "loadall", do_loadall },
2454 { "attach", do_attach },
2455 { "detach", do_detach },
2456 { "tracelog", do_tracelog },
2457 { "run", do_run },
2458 { "profile", do_profile },
2459 { 0 }
2460};
2461
2462int do_prog(int argc, char **argv)
2463{
2464 return cmd_select(cmds, argc, argv, do_help);
2465}