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
41 enum dump_mode {
42 DUMP_JITED,
43 DUMP_XLATED,
44 };
45
46 static 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 */
58 static 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
66 static struct hashmap *prog_table;
67
68 static 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
89 static 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
159 static 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
190 static 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_prog_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
219 static 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_prog_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_prog_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_map_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
294 free_map_ids:
295 free(map_ids);
296 return value;
297 }
298
299 static bool has_metadata_prefix(const char *s)
300 {
301 return strncmp(s, BPF_METADATA_PREFIX, BPF_METADATA_PREFIX_LEN) == 0;
302 }
303
304 static 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
408 out_free:
409 btf__free(btf);
410 free(value);
411 }
412
413 static 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
445 static void print_prog_json(struct bpf_prog_info *info, int fd, bool orphaned)
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_bool_field(json_wtr, "orphaned", orphaned);
465 jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len);
466
467 if (info->jited_prog_len) {
468 jsonw_bool_field(json_wtr, "jited", true);
469 jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len);
470 } else {
471 jsonw_bool_field(json_wtr, "jited", false);
472 }
473
474 memlock = get_fdinfo(fd, "memlock");
475 if (memlock)
476 jsonw_int_field(json_wtr, "bytes_memlock", atoll(memlock));
477 free(memlock);
478
479 if (info->nr_map_ids)
480 show_prog_maps(fd, info->nr_map_ids);
481
482 if (info->btf_id)
483 jsonw_int_field(json_wtr, "btf_id", info->btf_id);
484
485 if (!hashmap__empty(prog_table)) {
486 struct hashmap_entry *entry;
487
488 jsonw_name(json_wtr, "pinned");
489 jsonw_start_array(json_wtr);
490 hashmap__for_each_key_entry(prog_table, entry, info->id)
491 jsonw_string(json_wtr, entry->pvalue);
492 jsonw_end_array(json_wtr);
493 }
494
495 emit_obj_refs_json(refs_table, info->id, json_wtr);
496
497 show_prog_metadata(fd, info->nr_map_ids);
498
499 jsonw_end_object(json_wtr);
500 }
501
502 static void print_prog_header_plain(struct bpf_prog_info *info, int fd)
503 {
504 const char *prog_type_str;
505 char prog_name[MAX_PROG_FULL_NAME];
506
507 printf("%u: ", info->id);
508 prog_type_str = libbpf_bpf_prog_type_str(info->type);
509 if (prog_type_str)
510 printf("%s ", prog_type_str);
511 else
512 printf("type %u ", info->type);
513
514 if (*info->name) {
515 get_prog_full_name(info, fd, prog_name, sizeof(prog_name));
516 printf("name %s ", prog_name);
517 }
518
519 printf("tag ");
520 fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");
521 print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
522 printf("%s", info->gpl_compatible ? " gpl" : "");
523 if (info->run_time_ns)
524 printf(" run_time_ns %lld run_cnt %lld",
525 info->run_time_ns, info->run_cnt);
526 if (info->recursion_misses)
527 printf(" recursion_misses %lld", info->recursion_misses);
528 printf("\n");
529 }
530
531 static void print_prog_plain(struct bpf_prog_info *info, int fd, bool orphaned)
532 {
533 char *memlock;
534
535 print_prog_header_plain(info, fd);
536
537 if (info->load_time) {
538 char buf[32];
539
540 print_boot_time(info->load_time, buf, sizeof(buf));
541
542 /* Piggy back on load_time, since 0 uid is a valid one */
543 printf("\tloaded_at %s uid %u\n", buf, info->created_by_uid);
544 }
545
546 printf("\txlated %uB", info->xlated_prog_len);
547
548 if (info->jited_prog_len)
549 printf(" jited %uB", info->jited_prog_len);
550 else
551 printf(" not jited");
552
553 memlock = get_fdinfo(fd, "memlock");
554 if (memlock)
555 printf(" memlock %sB", memlock);
556 free(memlock);
557
558 if (orphaned)
559 printf(" orphaned");
560
561 if (info->nr_map_ids)
562 show_prog_maps(fd, info->nr_map_ids);
563
564 if (!hashmap__empty(prog_table)) {
565 struct hashmap_entry *entry;
566
567 hashmap__for_each_key_entry(prog_table, entry, info->id)
568 printf("\n\tpinned %s", (char *)entry->pvalue);
569 }
570
571 if (info->btf_id)
572 printf("\n\tbtf_id %d", info->btf_id);
573
574 emit_obj_refs_plain(refs_table, info->id, "\n\tpids ");
575
576 printf("\n");
577
578 show_prog_metadata(fd, info->nr_map_ids);
579 }
580
581 static int show_prog(int fd)
582 {
583 struct bpf_prog_info info = {};
584 __u32 len = sizeof(info);
585 int err;
586
587 err = bpf_prog_get_info_by_fd(fd, &info, &len);
588 if (err && err != -ENODEV) {
589 p_err("can't get prog info: %s", strerror(errno));
590 return -1;
591 }
592
593 if (json_output)
594 print_prog_json(&info, fd, err == -ENODEV);
595 else
596 print_prog_plain(&info, fd, err == -ENODEV);
597
598 return 0;
599 }
600
601 static int do_show_subset(int argc, char **argv)
602 {
603 int *fds = NULL;
604 int nb_fds, i;
605 int err = -1;
606
607 fds = malloc(sizeof(int));
608 if (!fds) {
609 p_err("mem alloc failed");
610 return -1;
611 }
612 nb_fds = prog_parse_fds(&argc, &argv, &fds);
613 if (nb_fds < 1)
614 goto exit_free;
615
616 if (json_output && nb_fds > 1)
617 jsonw_start_array(json_wtr); /* root array */
618 for (i = 0; i < nb_fds; i++) {
619 err = show_prog(fds[i]);
620 if (err) {
621 for (; i < nb_fds; i++)
622 close(fds[i]);
623 break;
624 }
625 close(fds[i]);
626 }
627 if (json_output && nb_fds > 1)
628 jsonw_end_array(json_wtr); /* root array */
629
630 exit_free:
631 free(fds);
632 return err;
633 }
634
635 static int do_show(int argc, char **argv)
636 {
637 __u32 id = 0;
638 int err;
639 int fd;
640
641 if (show_pinned) {
642 prog_table = hashmap__new(hash_fn_for_key_as_id,
643 equal_fn_for_key_as_id, NULL);
644 if (IS_ERR(prog_table)) {
645 p_err("failed to create hashmap for pinned paths");
646 return -1;
647 }
648 build_pinned_obj_table(prog_table, BPF_OBJ_PROG);
649 }
650 build_obj_refs_table(&refs_table, BPF_OBJ_PROG);
651
652 if (argc == 2)
653 return do_show_subset(argc, argv);
654
655 if (argc)
656 return BAD_ARG();
657
658 if (json_output)
659 jsonw_start_array(json_wtr);
660 while (true) {
661 err = bpf_prog_get_next_id(id, &id);
662 if (err) {
663 if (errno == ENOENT) {
664 err = 0;
665 break;
666 }
667 p_err("can't get next program: %s%s", strerror(errno),
668 errno == EINVAL ? " -- kernel too old?" : "");
669 err = -1;
670 break;
671 }
672
673 fd = bpf_prog_get_fd_by_id(id);
674 if (fd < 0) {
675 if (errno == ENOENT)
676 continue;
677 p_err("can't get prog by id (%u): %s",
678 id, strerror(errno));
679 err = -1;
680 break;
681 }
682
683 err = show_prog(fd);
684 close(fd);
685 if (err)
686 break;
687 }
688
689 if (json_output)
690 jsonw_end_array(json_wtr);
691
692 delete_obj_refs_table(refs_table);
693
694 if (show_pinned)
695 delete_pinned_obj_table(prog_table);
696
697 return err;
698 }
699
700 static int
701 prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
702 char *filepath, bool opcodes, bool visual, bool linum)
703 {
704 struct bpf_prog_linfo *prog_linfo = NULL;
705 const char *disasm_opt = NULL;
706 struct dump_data dd = {};
707 void *func_info = NULL;
708 struct btf *btf = NULL;
709 char func_sig[1024];
710 unsigned char *buf;
711 __u32 member_len;
712 int fd, err = -1;
713 ssize_t n;
714
715 if (mode == DUMP_JITED) {
716 if (info->jited_prog_len == 0 || !info->jited_prog_insns) {
717 p_info("no instructions returned");
718 return -1;
719 }
720 buf = u64_to_ptr(info->jited_prog_insns);
721 member_len = info->jited_prog_len;
722 } else { /* DUMP_XLATED */
723 if (info->xlated_prog_len == 0 || !info->xlated_prog_insns) {
724 p_err("error retrieving insn dump: kernel.kptr_restrict set?");
725 return -1;
726 }
727 buf = u64_to_ptr(info->xlated_prog_insns);
728 member_len = info->xlated_prog_len;
729 }
730
731 if (info->btf_id) {
732 btf = btf__load_from_kernel_by_id(info->btf_id);
733 if (!btf) {
734 p_err("failed to get btf");
735 return -1;
736 }
737 }
738
739 func_info = u64_to_ptr(info->func_info);
740
741 if (info->nr_line_info) {
742 prog_linfo = bpf_prog_linfo__new(info);
743 if (!prog_linfo)
744 p_info("error in processing bpf_line_info. continue without it.");
745 }
746
747 if (filepath) {
748 fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
749 if (fd < 0) {
750 p_err("can't open file %s: %s", filepath,
751 strerror(errno));
752 goto exit_free;
753 }
754
755 n = write(fd, buf, member_len);
756 close(fd);
757 if (n != (ssize_t)member_len) {
758 p_err("error writing output file: %s",
759 n < 0 ? strerror(errno) : "short write");
760 goto exit_free;
761 }
762
763 if (json_output)
764 jsonw_null(json_wtr);
765 } else if (mode == DUMP_JITED) {
766 const char *name = NULL;
767
768 if (info->ifindex) {
769 name = ifindex_to_arch(info->ifindex, info->netns_dev,
770 info->netns_ino, &disasm_opt);
771 if (!name)
772 goto exit_free;
773 }
774
775 if (info->nr_jited_func_lens && info->jited_func_lens) {
776 struct kernel_sym *sym = NULL;
777 struct bpf_func_info *record;
778 char sym_name[SYM_MAX_NAME];
779 unsigned char *img = buf;
780 __u64 *ksyms = NULL;
781 __u32 *lens;
782 __u32 i;
783 if (info->nr_jited_ksyms) {
784 kernel_syms_load(&dd);
785 ksyms = u64_to_ptr(info->jited_ksyms);
786 }
787
788 if (json_output)
789 jsonw_start_array(json_wtr);
790
791 lens = u64_to_ptr(info->jited_func_lens);
792 for (i = 0; i < info->nr_jited_func_lens; i++) {
793 if (ksyms) {
794 sym = kernel_syms_search(&dd, ksyms[i]);
795 if (sym)
796 sprintf(sym_name, "%s", sym->name);
797 else
798 sprintf(sym_name, "0x%016llx", ksyms[i]);
799 } else {
800 strcpy(sym_name, "unknown");
801 }
802
803 if (func_info) {
804 record = func_info + i * info->func_info_rec_size;
805 btf_dumper_type_only(btf, record->type_id,
806 func_sig,
807 sizeof(func_sig));
808 }
809
810 if (json_output) {
811 jsonw_start_object(json_wtr);
812 if (func_info && func_sig[0] != '\0') {
813 jsonw_name(json_wtr, "proto");
814 jsonw_string(json_wtr, func_sig);
815 }
816 jsonw_name(json_wtr, "name");
817 jsonw_string(json_wtr, sym_name);
818 jsonw_name(json_wtr, "insns");
819 } else {
820 if (func_info && func_sig[0] != '\0')
821 printf("%s:\n", func_sig);
822 printf("%s:\n", sym_name);
823 }
824
825 if (disasm_print_insn(img, lens[i], opcodes,
826 name, disasm_opt, btf,
827 prog_linfo, ksyms[i], i,
828 linum))
829 goto exit_free;
830
831 img += lens[i];
832
833 if (json_output)
834 jsonw_end_object(json_wtr);
835 else
836 printf("\n");
837 }
838
839 if (json_output)
840 jsonw_end_array(json_wtr);
841 } else {
842 if (disasm_print_insn(buf, member_len, opcodes, name,
843 disasm_opt, btf, NULL, 0, 0,
844 false))
845 goto exit_free;
846 }
847 } else {
848 kernel_syms_load(&dd);
849 dd.nr_jited_ksyms = info->nr_jited_ksyms;
850 dd.jited_ksyms = u64_to_ptr(info->jited_ksyms);
851 dd.btf = btf;
852 dd.func_info = func_info;
853 dd.finfo_rec_size = info->func_info_rec_size;
854 dd.prog_linfo = prog_linfo;
855
856 if (json_output)
857 dump_xlated_json(&dd, buf, member_len, opcodes, linum);
858 else if (visual)
859 dump_xlated_cfg(&dd, buf, member_len, opcodes, linum);
860 else
861 dump_xlated_plain(&dd, buf, member_len, opcodes, linum);
862 kernel_syms_destroy(&dd);
863 }
864
865 err = 0;
866
867 exit_free:
868 btf__free(btf);
869 bpf_prog_linfo__free(prog_linfo);
870 return err;
871 }
872
873 static int do_dump(int argc, char **argv)
874 {
875 struct bpf_prog_info info;
876 __u32 info_len = sizeof(info);
877 size_t info_data_sz = 0;
878 void *info_data = NULL;
879 char *filepath = NULL;
880 bool opcodes = false;
881 bool visual = false;
882 enum dump_mode mode;
883 bool linum = false;
884 int nb_fds, i = 0;
885 int *fds = NULL;
886 int err = -1;
887
888 if (is_prefix(*argv, "jited")) {
889 if (disasm_init())
890 return -1;
891 mode = DUMP_JITED;
892 } else if (is_prefix(*argv, "xlated")) {
893 mode = DUMP_XLATED;
894 } else {
895 p_err("expected 'xlated' or 'jited', got: %s", *argv);
896 return -1;
897 }
898 NEXT_ARG();
899
900 if (argc < 2)
901 usage();
902
903 fds = malloc(sizeof(int));
904 if (!fds) {
905 p_err("mem alloc failed");
906 return -1;
907 }
908 nb_fds = prog_parse_fds(&argc, &argv, &fds);
909 if (nb_fds < 1)
910 goto exit_free;
911
912 while (argc) {
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 } else {
941 usage();
942 goto exit_close;
943 }
944 }
945
946 if (filepath && (opcodes || visual || linum)) {
947 p_err("'file' is not compatible with 'opcodes', 'visual', or 'linum'");
948 goto exit_close;
949 }
950 if (json_output && visual) {
951 p_err("'visual' is not compatible with JSON output");
952 goto exit_close;
953 }
954
955 if (json_output && nb_fds > 1)
956 jsonw_start_array(json_wtr); /* root array */
957 for (i = 0; i < nb_fds; i++) {
958 memset(&info, 0, sizeof(info));
959
960 err = bpf_prog_get_info_by_fd(fds[i], &info, &info_len);
961 if (err) {
962 p_err("can't get prog info: %s", strerror(errno));
963 break;
964 }
965
966 err = prep_prog_info(&info, mode, &info_data, &info_data_sz);
967 if (err) {
968 p_err("can't grow prog info_data");
969 break;
970 }
971
972 err = bpf_prog_get_info_by_fd(fds[i], &info, &info_len);
973 if (err) {
974 p_err("can't get prog info: %s", strerror(errno));
975 break;
976 }
977
978 if (json_output && nb_fds > 1) {
979 jsonw_start_object(json_wtr); /* prog object */
980 print_prog_header_json(&info, fds[i]);
981 jsonw_name(json_wtr, "insns");
982 } else if (nb_fds > 1) {
983 print_prog_header_plain(&info, fds[i]);
984 }
985
986 err = prog_dump(&info, mode, filepath, opcodes, visual, linum);
987
988 if (json_output && nb_fds > 1)
989 jsonw_end_object(json_wtr); /* prog object */
990 else if (i != nb_fds - 1 && nb_fds > 1)
991 printf("\n");
992
993 if (err)
994 break;
995 close(fds[i]);
996 }
997 if (json_output && nb_fds > 1)
998 jsonw_end_array(json_wtr); /* root array */
999
1000 exit_close:
1001 for (; i < nb_fds; i++)
1002 close(fds[i]);
1003 exit_free:
1004 free(info_data);
1005 free(fds);
1006 return err;
1007 }
1008
1009 static int do_pin(int argc, char **argv)
1010 {
1011 int err;
1012
1013 err = do_pin_any(argc, argv, prog_parse_fd);
1014 if (!err && json_output)
1015 jsonw_null(json_wtr);
1016 return err;
1017 }
1018
1019 struct map_replace {
1020 int idx;
1021 int fd;
1022 char *name;
1023 };
1024
1025 static int map_replace_compar(const void *p1, const void *p2)
1026 {
1027 const struct map_replace *a = p1, *b = p2;
1028
1029 return a->idx - b->idx;
1030 }
1031
1032 static int parse_attach_detach_args(int argc, char **argv, int *progfd,
1033 enum bpf_attach_type *attach_type,
1034 int *mapfd)
1035 {
1036 if (!REQ_ARGS(3))
1037 return -EINVAL;
1038
1039 *progfd = prog_parse_fd(&argc, &argv);
1040 if (*progfd < 0)
1041 return *progfd;
1042
1043 *attach_type = parse_attach_type(*argv);
1044 if (*attach_type == __MAX_BPF_ATTACH_TYPE) {
1045 p_err("invalid attach/detach type");
1046 return -EINVAL;
1047 }
1048
1049 if (*attach_type == BPF_FLOW_DISSECTOR) {
1050 *mapfd = 0;
1051 return 0;
1052 }
1053
1054 NEXT_ARG();
1055 if (!REQ_ARGS(2))
1056 return -EINVAL;
1057
1058 *mapfd = map_parse_fd(&argc, &argv);
1059 if (*mapfd < 0)
1060 return *mapfd;
1061
1062 return 0;
1063 }
1064
1065 static int do_attach(int argc, char **argv)
1066 {
1067 enum bpf_attach_type attach_type;
1068 int err, progfd;
1069 int mapfd;
1070
1071 err = parse_attach_detach_args(argc, argv,
1072 &progfd, &attach_type, &mapfd);
1073 if (err)
1074 return err;
1075
1076 err = bpf_prog_attach(progfd, mapfd, attach_type, 0);
1077 if (err) {
1078 p_err("failed prog attach to map");
1079 return -EINVAL;
1080 }
1081
1082 if (json_output)
1083 jsonw_null(json_wtr);
1084 return 0;
1085 }
1086
1087 static int do_detach(int argc, char **argv)
1088 {
1089 enum bpf_attach_type attach_type;
1090 int err, progfd;
1091 int mapfd;
1092
1093 err = parse_attach_detach_args(argc, argv,
1094 &progfd, &attach_type, &mapfd);
1095 if (err)
1096 return err;
1097
1098 err = bpf_prog_detach2(progfd, mapfd, attach_type);
1099 if (err) {
1100 p_err("failed prog detach from map");
1101 return -EINVAL;
1102 }
1103
1104 if (json_output)
1105 jsonw_null(json_wtr);
1106 return 0;
1107 }
1108
1109 static int check_single_stdin(char *file_data_in, char *file_ctx_in)
1110 {
1111 if (file_data_in && file_ctx_in &&
1112 !strcmp(file_data_in, "-") && !strcmp(file_ctx_in, "-")) {
1113 p_err("cannot use standard input for both data_in and ctx_in");
1114 return -1;
1115 }
1116
1117 return 0;
1118 }
1119
1120 static int get_run_data(const char *fname, void **data_ptr, unsigned int *size)
1121 {
1122 size_t block_size = 256;
1123 size_t buf_size = block_size;
1124 size_t nb_read = 0;
1125 void *tmp;
1126 FILE *f;
1127
1128 if (!fname) {
1129 *data_ptr = NULL;
1130 *size = 0;
1131 return 0;
1132 }
1133
1134 if (!strcmp(fname, "-"))
1135 f = stdin;
1136 else
1137 f = fopen(fname, "r");
1138 if (!f) {
1139 p_err("failed to open %s: %s", fname, strerror(errno));
1140 return -1;
1141 }
1142
1143 *data_ptr = malloc(block_size);
1144 if (!*data_ptr) {
1145 p_err("failed to allocate memory for data_in/ctx_in: %s",
1146 strerror(errno));
1147 goto err_fclose;
1148 }
1149
1150 while ((nb_read += fread(*data_ptr + nb_read, 1, block_size, f))) {
1151 if (feof(f))
1152 break;
1153 if (ferror(f)) {
1154 p_err("failed to read data_in/ctx_in from %s: %s",
1155 fname, strerror(errno));
1156 goto err_free;
1157 }
1158 if (nb_read > buf_size - block_size) {
1159 if (buf_size == UINT32_MAX) {
1160 p_err("data_in/ctx_in is too long (max: %d)",
1161 UINT32_MAX);
1162 goto err_free;
1163 }
1164 /* No space for fread()-ing next chunk; realloc() */
1165 buf_size *= 2;
1166 tmp = realloc(*data_ptr, buf_size);
1167 if (!tmp) {
1168 p_err("failed to reallocate data_in/ctx_in: %s",
1169 strerror(errno));
1170 goto err_free;
1171 }
1172 *data_ptr = tmp;
1173 }
1174 }
1175 if (f != stdin)
1176 fclose(f);
1177
1178 *size = nb_read;
1179 return 0;
1180
1181 err_free:
1182 free(*data_ptr);
1183 *data_ptr = NULL;
1184 err_fclose:
1185 if (f != stdin)
1186 fclose(f);
1187 return -1;
1188 }
1189
1190 static void hex_print(void *data, unsigned int size, FILE *f)
1191 {
1192 size_t i, j;
1193 char c;
1194
1195 for (i = 0; i < size; i += 16) {
1196 /* Row offset */
1197 fprintf(f, "%07zx\t", i);
1198
1199 /* Hexadecimal values */
1200 for (j = i; j < i + 16 && j < size; j++)
1201 fprintf(f, "%02x%s", *(uint8_t *)(data + j),
1202 j % 2 ? " " : "");
1203 for (; j < i + 16; j++)
1204 fprintf(f, " %s", j % 2 ? " " : "");
1205
1206 /* ASCII values (if relevant), '.' otherwise */
1207 fprintf(f, "| ");
1208 for (j = i; j < i + 16 && j < size; j++) {
1209 c = *(char *)(data + j);
1210 if (c < ' ' || c > '~')
1211 c = '.';
1212 fprintf(f, "%c%s", c, j == i + 7 ? " " : "");
1213 }
1214
1215 fprintf(f, "\n");
1216 }
1217 }
1218
1219 static int
1220 print_run_output(void *data, unsigned int size, const char *fname,
1221 const char *json_key)
1222 {
1223 size_t nb_written;
1224 FILE *f;
1225
1226 if (!fname)
1227 return 0;
1228
1229 if (!strcmp(fname, "-")) {
1230 f = stdout;
1231 if (json_output) {
1232 jsonw_name(json_wtr, json_key);
1233 print_data_json(data, size);
1234 } else {
1235 hex_print(data, size, f);
1236 }
1237 return 0;
1238 }
1239
1240 f = fopen(fname, "w");
1241 if (!f) {
1242 p_err("failed to open %s: %s", fname, strerror(errno));
1243 return -1;
1244 }
1245
1246 nb_written = fwrite(data, 1, size, f);
1247 fclose(f);
1248 if (nb_written != size) {
1249 p_err("failed to write output data/ctx: %s", strerror(errno));
1250 return -1;
1251 }
1252
1253 return 0;
1254 }
1255
1256 static int alloc_run_data(void **data_ptr, unsigned int size_out)
1257 {
1258 *data_ptr = calloc(size_out, 1);
1259 if (!*data_ptr) {
1260 p_err("failed to allocate memory for output data/ctx: %s",
1261 strerror(errno));
1262 return -1;
1263 }
1264
1265 return 0;
1266 }
1267
1268 static int do_run(int argc, char **argv)
1269 {
1270 char *data_fname_in = NULL, *data_fname_out = NULL;
1271 char *ctx_fname_in = NULL, *ctx_fname_out = NULL;
1272 const unsigned int default_size = SZ_32K;
1273 void *data_in = NULL, *data_out = NULL;
1274 void *ctx_in = NULL, *ctx_out = NULL;
1275 unsigned int repeat = 1;
1276 int fd, err;
1277 LIBBPF_OPTS(bpf_test_run_opts, test_attr);
1278
1279 if (!REQ_ARGS(4))
1280 return -1;
1281
1282 fd = prog_parse_fd(&argc, &argv);
1283 if (fd < 0)
1284 return -1;
1285
1286 while (argc) {
1287 if (detect_common_prefix(*argv, "data_in", "data_out",
1288 "data_size_out", NULL))
1289 return -1;
1290 if (detect_common_prefix(*argv, "ctx_in", "ctx_out",
1291 "ctx_size_out", NULL))
1292 return -1;
1293
1294 if (is_prefix(*argv, "data_in")) {
1295 NEXT_ARG();
1296 if (!REQ_ARGS(1))
1297 return -1;
1298
1299 data_fname_in = GET_ARG();
1300 if (check_single_stdin(data_fname_in, ctx_fname_in))
1301 return -1;
1302 } else if (is_prefix(*argv, "data_out")) {
1303 NEXT_ARG();
1304 if (!REQ_ARGS(1))
1305 return -1;
1306
1307 data_fname_out = GET_ARG();
1308 } else if (is_prefix(*argv, "data_size_out")) {
1309 char *endptr;
1310
1311 NEXT_ARG();
1312 if (!REQ_ARGS(1))
1313 return -1;
1314
1315 test_attr.data_size_out = strtoul(*argv, &endptr, 0);
1316 if (*endptr) {
1317 p_err("can't parse %s as output data size",
1318 *argv);
1319 return -1;
1320 }
1321 NEXT_ARG();
1322 } else if (is_prefix(*argv, "ctx_in")) {
1323 NEXT_ARG();
1324 if (!REQ_ARGS(1))
1325 return -1;
1326
1327 ctx_fname_in = GET_ARG();
1328 if (check_single_stdin(data_fname_in, ctx_fname_in))
1329 return -1;
1330 } else if (is_prefix(*argv, "ctx_out")) {
1331 NEXT_ARG();
1332 if (!REQ_ARGS(1))
1333 return -1;
1334
1335 ctx_fname_out = GET_ARG();
1336 } else if (is_prefix(*argv, "ctx_size_out")) {
1337 char *endptr;
1338
1339 NEXT_ARG();
1340 if (!REQ_ARGS(1))
1341 return -1;
1342
1343 test_attr.ctx_size_out = strtoul(*argv, &endptr, 0);
1344 if (*endptr) {
1345 p_err("can't parse %s as output context size",
1346 *argv);
1347 return -1;
1348 }
1349 NEXT_ARG();
1350 } else if (is_prefix(*argv, "repeat")) {
1351 char *endptr;
1352
1353 NEXT_ARG();
1354 if (!REQ_ARGS(1))
1355 return -1;
1356
1357 repeat = strtoul(*argv, &endptr, 0);
1358 if (*endptr) {
1359 p_err("can't parse %s as repeat number",
1360 *argv);
1361 return -1;
1362 }
1363 NEXT_ARG();
1364 } else {
1365 p_err("expected no more arguments, 'data_in', 'data_out', 'data_size_out', 'ctx_in', 'ctx_out', 'ctx_size_out' or 'repeat', got: '%s'?",
1366 *argv);
1367 return -1;
1368 }
1369 }
1370
1371 err = get_run_data(data_fname_in, &data_in, &test_attr.data_size_in);
1372 if (err)
1373 return -1;
1374
1375 if (data_in) {
1376 if (!test_attr.data_size_out)
1377 test_attr.data_size_out = default_size;
1378 err = alloc_run_data(&data_out, test_attr.data_size_out);
1379 if (err)
1380 goto free_data_in;
1381 }
1382
1383 err = get_run_data(ctx_fname_in, &ctx_in, &test_attr.ctx_size_in);
1384 if (err)
1385 goto free_data_out;
1386
1387 if (ctx_in) {
1388 if (!test_attr.ctx_size_out)
1389 test_attr.ctx_size_out = default_size;
1390 err = alloc_run_data(&ctx_out, test_attr.ctx_size_out);
1391 if (err)
1392 goto free_ctx_in;
1393 }
1394
1395 test_attr.repeat = repeat;
1396 test_attr.data_in = data_in;
1397 test_attr.data_out = data_out;
1398 test_attr.ctx_in = ctx_in;
1399 test_attr.ctx_out = ctx_out;
1400
1401 err = bpf_prog_test_run_opts(fd, &test_attr);
1402 if (err) {
1403 p_err("failed to run program: %s", strerror(errno));
1404 goto free_ctx_out;
1405 }
1406
1407 err = 0;
1408
1409 if (json_output)
1410 jsonw_start_object(json_wtr); /* root */
1411
1412 /* Do not exit on errors occurring when printing output data/context,
1413 * we still want to print return value and duration for program run.
1414 */
1415 if (test_attr.data_size_out)
1416 err += print_run_output(test_attr.data_out,
1417 test_attr.data_size_out,
1418 data_fname_out, "data_out");
1419 if (test_attr.ctx_size_out)
1420 err += print_run_output(test_attr.ctx_out,
1421 test_attr.ctx_size_out,
1422 ctx_fname_out, "ctx_out");
1423
1424 if (json_output) {
1425 jsonw_uint_field(json_wtr, "retval", test_attr.retval);
1426 jsonw_uint_field(json_wtr, "duration", test_attr.duration);
1427 jsonw_end_object(json_wtr); /* root */
1428 } else {
1429 fprintf(stdout, "Return value: %u, duration%s: %uns\n",
1430 test_attr.retval,
1431 repeat > 1 ? " (average)" : "", test_attr.duration);
1432 }
1433
1434 free_ctx_out:
1435 free(ctx_out);
1436 free_ctx_in:
1437 free(ctx_in);
1438 free_data_out:
1439 free(data_out);
1440 free_data_in:
1441 free(data_in);
1442
1443 return err;
1444 }
1445
1446 static int
1447 get_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type,
1448 enum bpf_attach_type *expected_attach_type)
1449 {
1450 libbpf_print_fn_t print_backup;
1451 int ret;
1452
1453 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
1454 if (!ret)
1455 return ret;
1456
1457 /* libbpf_prog_type_by_name() failed, let's re-run with debug level */
1458 print_backup = libbpf_set_print(print_all_levels);
1459 ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
1460 libbpf_set_print(print_backup);
1461
1462 return ret;
1463 }
1464
1465 static int
1466 auto_attach_program(struct bpf_program *prog, const char *path)
1467 {
1468 struct bpf_link *link;
1469 int err;
1470
1471 link = bpf_program__attach(prog);
1472 if (!link) {
1473 p_info("Program %s does not support autoattach, falling back to pinning",
1474 bpf_program__name(prog));
1475 return bpf_obj_pin(bpf_program__fd(prog), path);
1476 }
1477
1478 err = bpf_link__pin(link, path);
1479 bpf_link__destroy(link);
1480 return err;
1481 }
1482
1483 static int
1484 auto_attach_programs(struct bpf_object *obj, const char *path)
1485 {
1486 struct bpf_program *prog;
1487 char buf[PATH_MAX];
1488 int err;
1489
1490 bpf_object__for_each_program(prog, obj) {
1491 err = pathname_concat(buf, sizeof(buf), path, bpf_program__name(prog));
1492 if (err)
1493 goto err_unpin_programs;
1494
1495 err = auto_attach_program(prog, buf);
1496 if (err)
1497 goto err_unpin_programs;
1498 }
1499
1500 return 0;
1501
1502 err_unpin_programs:
1503 while ((prog = bpf_object__prev_program(obj, prog))) {
1504 if (pathname_concat(buf, sizeof(buf), path, bpf_program__name(prog)))
1505 continue;
1506
1507 bpf_program__unpin(prog, buf);
1508 }
1509
1510 return err;
1511 }
1512
1513 static int load_with_options(int argc, char **argv, bool first_prog_only)
1514 {
1515 enum bpf_prog_type common_prog_type = BPF_PROG_TYPE_UNSPEC;
1516 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts,
1517 .relaxed_maps = relaxed_maps,
1518 );
1519 enum bpf_attach_type expected_attach_type;
1520 struct map_replace *map_replace = NULL;
1521 struct bpf_program *prog = NULL, *pos;
1522 unsigned int old_map_fds = 0;
1523 const char *pinmaps = NULL;
1524 __u32 xdpmeta_ifindex = 0;
1525 __u32 offload_ifindex = 0;
1526 bool auto_attach = false;
1527 struct bpf_object *obj;
1528 struct bpf_map *map;
1529 const char *pinfile;
1530 unsigned int i, j;
1531 const char *file;
1532 int idx, err;
1533
1534
1535 if (!REQ_ARGS(2))
1536 return -1;
1537 file = GET_ARG();
1538 pinfile = GET_ARG();
1539
1540 while (argc) {
1541 if (is_prefix(*argv, "type")) {
1542 NEXT_ARG();
1543
1544 if (common_prog_type != BPF_PROG_TYPE_UNSPEC) {
1545 p_err("program type already specified");
1546 goto err_free_reuse_maps;
1547 }
1548 if (!REQ_ARGS(1))
1549 goto err_free_reuse_maps;
1550
1551 err = libbpf_prog_type_by_name(*argv, &common_prog_type,
1552 &expected_attach_type);
1553 if (err < 0) {
1554 /* Put a '/' at the end of type to appease libbpf */
1555 char *type = malloc(strlen(*argv) + 2);
1556
1557 if (!type) {
1558 p_err("mem alloc failed");
1559 goto err_free_reuse_maps;
1560 }
1561 *type = 0;
1562 strcat(type, *argv);
1563 strcat(type, "/");
1564
1565 err = get_prog_type_by_name(type, &common_prog_type,
1566 &expected_attach_type);
1567 free(type);
1568 if (err < 0)
1569 goto err_free_reuse_maps;
1570 }
1571
1572 NEXT_ARG();
1573 } else if (is_prefix(*argv, "map")) {
1574 void *new_map_replace;
1575 char *endptr, *name;
1576 int fd;
1577
1578 NEXT_ARG();
1579
1580 if (!REQ_ARGS(4))
1581 goto err_free_reuse_maps;
1582
1583 if (is_prefix(*argv, "idx")) {
1584 NEXT_ARG();
1585
1586 idx = strtoul(*argv, &endptr, 0);
1587 if (*endptr) {
1588 p_err("can't parse %s as IDX", *argv);
1589 goto err_free_reuse_maps;
1590 }
1591 name = NULL;
1592 } else if (is_prefix(*argv, "name")) {
1593 NEXT_ARG();
1594
1595 name = *argv;
1596 idx = -1;
1597 } else {
1598 p_err("expected 'idx' or 'name', got: '%s'?",
1599 *argv);
1600 goto err_free_reuse_maps;
1601 }
1602 NEXT_ARG();
1603
1604 fd = map_parse_fd(&argc, &argv);
1605 if (fd < 0)
1606 goto err_free_reuse_maps;
1607
1608 new_map_replace = libbpf_reallocarray(map_replace,
1609 old_map_fds + 1,
1610 sizeof(*map_replace));
1611 if (!new_map_replace) {
1612 p_err("mem alloc failed");
1613 goto err_free_reuse_maps;
1614 }
1615 map_replace = new_map_replace;
1616
1617 map_replace[old_map_fds].idx = idx;
1618 map_replace[old_map_fds].name = name;
1619 map_replace[old_map_fds].fd = fd;
1620 old_map_fds++;
1621 } else if (is_prefix(*argv, "dev")) {
1622 p_info("Warning: 'bpftool prog load [...] dev <ifname>' syntax is deprecated.\n"
1623 "Going further, please use 'offload_dev <ifname>' to offload program to device.\n"
1624 "For applications using XDP hints only, use 'xdpmeta_dev <ifname>'.");
1625 goto offload_dev;
1626 } else if (is_prefix(*argv, "offload_dev")) {
1627 offload_dev:
1628 NEXT_ARG();
1629
1630 if (offload_ifindex) {
1631 p_err("offload_dev already specified");
1632 goto err_free_reuse_maps;
1633 } else if (xdpmeta_ifindex) {
1634 p_err("xdpmeta_dev and offload_dev are mutually exclusive");
1635 goto err_free_reuse_maps;
1636 }
1637 if (!REQ_ARGS(1))
1638 goto err_free_reuse_maps;
1639
1640 offload_ifindex = if_nametoindex(*argv);
1641 if (!offload_ifindex) {
1642 p_err("unrecognized netdevice '%s': %s",
1643 *argv, strerror(errno));
1644 goto err_free_reuse_maps;
1645 }
1646 NEXT_ARG();
1647 } else if (is_prefix(*argv, "xdpmeta_dev")) {
1648 NEXT_ARG();
1649
1650 if (xdpmeta_ifindex) {
1651 p_err("xdpmeta_dev already specified");
1652 goto err_free_reuse_maps;
1653 } else if (offload_ifindex) {
1654 p_err("xdpmeta_dev and offload_dev are mutually exclusive");
1655 goto err_free_reuse_maps;
1656 }
1657 if (!REQ_ARGS(1))
1658 goto err_free_reuse_maps;
1659
1660 xdpmeta_ifindex = if_nametoindex(*argv);
1661 if (!xdpmeta_ifindex) {
1662 p_err("unrecognized netdevice '%s': %s",
1663 *argv, strerror(errno));
1664 goto err_free_reuse_maps;
1665 }
1666 NEXT_ARG();
1667 } else if (is_prefix(*argv, "pinmaps")) {
1668 NEXT_ARG();
1669
1670 if (!REQ_ARGS(1))
1671 goto err_free_reuse_maps;
1672
1673 pinmaps = GET_ARG();
1674 } else if (is_prefix(*argv, "autoattach")) {
1675 auto_attach = true;
1676 NEXT_ARG();
1677 } else {
1678 p_err("expected no more arguments, 'type', 'map' or 'dev', got: '%s'?",
1679 *argv);
1680 goto err_free_reuse_maps;
1681 }
1682 }
1683
1684 set_max_rlimit();
1685
1686 if (verifier_logs)
1687 /* log_level1 + log_level2 + stats, but not stable UAPI */
1688 open_opts.kernel_log_level = 1 + 2 + 4;
1689
1690 obj = bpf_object__open_file(file, &open_opts);
1691 if (!obj) {
1692 p_err("failed to open object file");
1693 goto err_free_reuse_maps;
1694 }
1695
1696 bpf_object__for_each_program(pos, obj) {
1697 enum bpf_prog_type prog_type = common_prog_type;
1698
1699 if (prog_type == BPF_PROG_TYPE_UNSPEC) {
1700 const char *sec_name = bpf_program__section_name(pos);
1701
1702 err = get_prog_type_by_name(sec_name, &prog_type,
1703 &expected_attach_type);
1704 if (err < 0)
1705 goto err_close_obj;
1706 }
1707
1708 if (prog_type == BPF_PROG_TYPE_XDP && xdpmeta_ifindex) {
1709 bpf_program__set_flags(pos, BPF_F_XDP_DEV_BOUND_ONLY);
1710 bpf_program__set_ifindex(pos, xdpmeta_ifindex);
1711 } else {
1712 bpf_program__set_ifindex(pos, offload_ifindex);
1713 }
1714 if (bpf_program__type(pos) != prog_type)
1715 bpf_program__set_type(pos, prog_type);
1716 bpf_program__set_expected_attach_type(pos, expected_attach_type);
1717 }
1718
1719 qsort(map_replace, old_map_fds, sizeof(*map_replace),
1720 map_replace_compar);
1721
1722 /* After the sort maps by name will be first on the list, because they
1723 * have idx == -1. Resolve them.
1724 */
1725 j = 0;
1726 while (j < old_map_fds && map_replace[j].name) {
1727 i = 0;
1728 bpf_object__for_each_map(map, obj) {
1729 if (!strcmp(bpf_map__name(map), map_replace[j].name)) {
1730 map_replace[j].idx = i;
1731 break;
1732 }
1733 i++;
1734 }
1735 if (map_replace[j].idx == -1) {
1736 p_err("unable to find map '%s'", map_replace[j].name);
1737 goto err_close_obj;
1738 }
1739 j++;
1740 }
1741 /* Resort if any names were resolved */
1742 if (j)
1743 qsort(map_replace, old_map_fds, sizeof(*map_replace),
1744 map_replace_compar);
1745
1746 /* Set ifindex and name reuse */
1747 j = 0;
1748 idx = 0;
1749 bpf_object__for_each_map(map, obj) {
1750 if (bpf_map__type(map) != BPF_MAP_TYPE_PERF_EVENT_ARRAY)
1751 bpf_map__set_ifindex(map, offload_ifindex);
1752
1753 if (j < old_map_fds && idx == map_replace[j].idx) {
1754 err = bpf_map__reuse_fd(map, map_replace[j++].fd);
1755 if (err) {
1756 p_err("unable to set up map reuse: %d", err);
1757 goto err_close_obj;
1758 }
1759
1760 /* Next reuse wants to apply to the same map */
1761 if (j < old_map_fds && map_replace[j].idx == idx) {
1762 p_err("replacement for map idx %d specified more than once",
1763 idx);
1764 goto err_close_obj;
1765 }
1766 }
1767
1768 idx++;
1769 }
1770 if (j < old_map_fds) {
1771 p_err("map idx '%d' not used", map_replace[j].idx);
1772 goto err_close_obj;
1773 }
1774
1775 err = bpf_object__load(obj);
1776 if (err) {
1777 p_err("failed to load object file");
1778 goto err_close_obj;
1779 }
1780
1781 if (first_prog_only)
1782 err = mount_bpffs_for_file(pinfile);
1783 else
1784 err = create_and_mount_bpffs_dir(pinfile);
1785 if (err)
1786 goto err_close_obj;
1787
1788 if (first_prog_only) {
1789 prog = bpf_object__next_program(obj, NULL);
1790 if (!prog) {
1791 p_err("object file doesn't contain any bpf program");
1792 goto err_close_obj;
1793 }
1794
1795 if (auto_attach)
1796 err = auto_attach_program(prog, pinfile);
1797 else
1798 err = bpf_obj_pin(bpf_program__fd(prog), pinfile);
1799 if (err) {
1800 p_err("failed to pin program %s",
1801 bpf_program__section_name(prog));
1802 goto err_close_obj;
1803 }
1804 } else {
1805 if (auto_attach)
1806 err = auto_attach_programs(obj, pinfile);
1807 else
1808 err = bpf_object__pin_programs(obj, pinfile);
1809 if (err) {
1810 p_err("failed to pin all programs");
1811 goto err_close_obj;
1812 }
1813 }
1814
1815 if (pinmaps) {
1816 err = create_and_mount_bpffs_dir(pinmaps);
1817 if (err)
1818 goto err_unpin;
1819
1820 err = bpf_object__pin_maps(obj, pinmaps);
1821 if (err) {
1822 p_err("failed to pin all maps");
1823 goto err_unpin;
1824 }
1825 }
1826
1827 if (json_output)
1828 jsonw_null(json_wtr);
1829
1830 bpf_object__close(obj);
1831 for (i = 0; i < old_map_fds; i++)
1832 close(map_replace[i].fd);
1833 free(map_replace);
1834
1835 return 0;
1836
1837 err_unpin:
1838 if (first_prog_only)
1839 unlink(pinfile);
1840 else
1841 bpf_object__unpin_programs(obj, pinfile);
1842 err_close_obj:
1843 bpf_object__close(obj);
1844 err_free_reuse_maps:
1845 for (i = 0; i < old_map_fds; i++)
1846 close(map_replace[i].fd);
1847 free(map_replace);
1848 return -1;
1849 }
1850
1851 static int count_open_fds(void)
1852 {
1853 DIR *dp = opendir("/proc/self/fd");
1854 struct dirent *de;
1855 int cnt = -3;
1856
1857 if (!dp)
1858 return -1;
1859
1860 while ((de = readdir(dp)))
1861 cnt++;
1862
1863 closedir(dp);
1864 return cnt;
1865 }
1866
1867 static int try_loader(struct gen_loader_opts *gen)
1868 {
1869 struct bpf_load_and_run_opts opts = {};
1870 struct bpf_loader_ctx *ctx;
1871 int ctx_sz = sizeof(*ctx) + 64 * max(sizeof(struct bpf_map_desc),
1872 sizeof(struct bpf_prog_desc));
1873 int log_buf_sz = (1u << 24) - 1;
1874 int err, fds_before, fd_delta;
1875 char *log_buf = NULL;
1876
1877 ctx = alloca(ctx_sz);
1878 memset(ctx, 0, ctx_sz);
1879 ctx->sz = ctx_sz;
1880 if (verifier_logs) {
1881 ctx->log_level = 1 + 2 + 4;
1882 ctx->log_size = log_buf_sz;
1883 log_buf = malloc(log_buf_sz);
1884 if (!log_buf)
1885 return -ENOMEM;
1886 ctx->log_buf = (long) log_buf;
1887 }
1888 opts.ctx = ctx;
1889 opts.data = gen->data;
1890 opts.data_sz = gen->data_sz;
1891 opts.insns = gen->insns;
1892 opts.insns_sz = gen->insns_sz;
1893 fds_before = count_open_fds();
1894 err = bpf_load_and_run(&opts);
1895 fd_delta = count_open_fds() - fds_before;
1896 if (err < 0 || verifier_logs) {
1897 fprintf(stderr, "err %d\n%s\n%s", err, opts.errstr, log_buf);
1898 if (fd_delta && err < 0)
1899 fprintf(stderr, "loader prog leaked %d FDs\n",
1900 fd_delta);
1901 }
1902 free(log_buf);
1903 return err;
1904 }
1905
1906 static int do_loader(int argc, char **argv)
1907 {
1908 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts);
1909 DECLARE_LIBBPF_OPTS(gen_loader_opts, gen);
1910 struct bpf_object *obj;
1911 const char *file;
1912 int err = 0;
1913
1914 if (!REQ_ARGS(1))
1915 return -1;
1916 file = GET_ARG();
1917
1918 if (verifier_logs)
1919 /* log_level1 + log_level2 + stats, but not stable UAPI */
1920 open_opts.kernel_log_level = 1 + 2 + 4;
1921
1922 obj = bpf_object__open_file(file, &open_opts);
1923 if (!obj) {
1924 p_err("failed to open object file");
1925 goto err_close_obj;
1926 }
1927
1928 err = bpf_object__gen_loader(obj, &gen);
1929 if (err)
1930 goto err_close_obj;
1931
1932 err = bpf_object__load(obj);
1933 if (err) {
1934 p_err("failed to load object file");
1935 goto err_close_obj;
1936 }
1937
1938 if (verifier_logs) {
1939 struct dump_data dd = {};
1940
1941 kernel_syms_load(&dd);
1942 dump_xlated_plain(&dd, (void *)gen.insns, gen.insns_sz, false, false);
1943 kernel_syms_destroy(&dd);
1944 }
1945 err = try_loader(&gen);
1946 err_close_obj:
1947 bpf_object__close(obj);
1948 return err;
1949 }
1950
1951 static int do_load(int argc, char **argv)
1952 {
1953 if (use_loader)
1954 return do_loader(argc, argv);
1955 return load_with_options(argc, argv, true);
1956 }
1957
1958 static int do_loadall(int argc, char **argv)
1959 {
1960 return load_with_options(argc, argv, false);
1961 }
1962
1963 #ifdef BPFTOOL_WITHOUT_SKELETONS
1964
1965 static int do_profile(int argc, char **argv)
1966 {
1967 p_err("bpftool prog profile command is not supported. Please build bpftool with clang >= 10.0.0");
1968 return 0;
1969 }
1970
1971 #else /* BPFTOOL_WITHOUT_SKELETONS */
1972
1973 #include "profiler.skel.h"
1974
1975 struct profile_metric {
1976 const char *name;
1977 struct bpf_perf_event_value val;
1978 struct perf_event_attr attr;
1979 bool selected;
1980
1981 /* calculate ratios like instructions per cycle */
1982 const int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */
1983 const char *ratio_desc;
1984 const float ratio_mul;
1985 } metrics[] = {
1986 {
1987 .name = "cycles",
1988 .attr = {
1989 .type = PERF_TYPE_HARDWARE,
1990 .config = PERF_COUNT_HW_CPU_CYCLES,
1991 .exclude_user = 1,
1992 },
1993 },
1994 {
1995 .name = "instructions",
1996 .attr = {
1997 .type = PERF_TYPE_HARDWARE,
1998 .config = PERF_COUNT_HW_INSTRUCTIONS,
1999 .exclude_user = 1,
2000 },
2001 .ratio_metric = 1,
2002 .ratio_desc = "insns per cycle",
2003 .ratio_mul = 1.0,
2004 },
2005 {
2006 .name = "l1d_loads",
2007 .attr = {
2008 .type = PERF_TYPE_HW_CACHE,
2009 .config =
2010 PERF_COUNT_HW_CACHE_L1D |
2011 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
2012 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
2013 .exclude_user = 1,
2014 },
2015 },
2016 {
2017 .name = "llc_misses",
2018 .attr = {
2019 .type = PERF_TYPE_HW_CACHE,
2020 .config =
2021 PERF_COUNT_HW_CACHE_LL |
2022 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
2023 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
2024 .exclude_user = 1
2025 },
2026 .ratio_metric = 2,
2027 .ratio_desc = "LLC misses per million insns",
2028 .ratio_mul = 1e6,
2029 },
2030 {
2031 .name = "itlb_misses",
2032 .attr = {
2033 .type = PERF_TYPE_HW_CACHE,
2034 .config =
2035 PERF_COUNT_HW_CACHE_ITLB |
2036 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
2037 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
2038 .exclude_user = 1
2039 },
2040 .ratio_metric = 2,
2041 .ratio_desc = "itlb misses per million insns",
2042 .ratio_mul = 1e6,
2043 },
2044 {
2045 .name = "dtlb_misses",
2046 .attr = {
2047 .type = PERF_TYPE_HW_CACHE,
2048 .config =
2049 PERF_COUNT_HW_CACHE_DTLB |
2050 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
2051 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
2052 .exclude_user = 1
2053 },
2054 .ratio_metric = 2,
2055 .ratio_desc = "dtlb misses per million insns",
2056 .ratio_mul = 1e6,
2057 },
2058 };
2059
2060 static __u64 profile_total_count;
2061
2062 #define MAX_NUM_PROFILE_METRICS 4
2063
2064 static int profile_parse_metrics(int argc, char **argv)
2065 {
2066 unsigned int metric_cnt;
2067 int selected_cnt = 0;
2068 unsigned int i;
2069
2070 metric_cnt = ARRAY_SIZE(metrics);
2071
2072 while (argc > 0) {
2073 for (i = 0; i < metric_cnt; i++) {
2074 if (is_prefix(argv[0], metrics[i].name)) {
2075 if (!metrics[i].selected)
2076 selected_cnt++;
2077 metrics[i].selected = true;
2078 break;
2079 }
2080 }
2081 if (i == metric_cnt) {
2082 p_err("unknown metric %s", argv[0]);
2083 return -1;
2084 }
2085 NEXT_ARG();
2086 }
2087 if (selected_cnt > MAX_NUM_PROFILE_METRICS) {
2088 p_err("too many (%d) metrics, please specify no more than %d metrics at a time",
2089 selected_cnt, MAX_NUM_PROFILE_METRICS);
2090 return -1;
2091 }
2092 return selected_cnt;
2093 }
2094
2095 static void profile_read_values(struct profiler_bpf *obj)
2096 {
2097 __u32 m, cpu, num_cpu = obj->rodata->num_cpu;
2098 int reading_map_fd, count_map_fd;
2099 __u64 counts[num_cpu];
2100 __u32 key = 0;
2101 int err;
2102
2103 reading_map_fd = bpf_map__fd(obj->maps.accum_readings);
2104 count_map_fd = bpf_map__fd(obj->maps.counts);
2105 if (reading_map_fd < 0 || count_map_fd < 0) {
2106 p_err("failed to get fd for map");
2107 return;
2108 }
2109
2110 err = bpf_map_lookup_elem(count_map_fd, &key, counts);
2111 if (err) {
2112 p_err("failed to read count_map: %s", strerror(errno));
2113 return;
2114 }
2115
2116 profile_total_count = 0;
2117 for (cpu = 0; cpu < num_cpu; cpu++)
2118 profile_total_count += counts[cpu];
2119
2120 for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2121 struct bpf_perf_event_value values[num_cpu];
2122
2123 if (!metrics[m].selected)
2124 continue;
2125
2126 err = bpf_map_lookup_elem(reading_map_fd, &key, values);
2127 if (err) {
2128 p_err("failed to read reading_map: %s",
2129 strerror(errno));
2130 return;
2131 }
2132 for (cpu = 0; cpu < num_cpu; cpu++) {
2133 metrics[m].val.counter += values[cpu].counter;
2134 metrics[m].val.enabled += values[cpu].enabled;
2135 metrics[m].val.running += values[cpu].running;
2136 }
2137 key++;
2138 }
2139 }
2140
2141 static void profile_print_readings_json(void)
2142 {
2143 __u32 m;
2144
2145 jsonw_start_array(json_wtr);
2146 for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2147 if (!metrics[m].selected)
2148 continue;
2149 jsonw_start_object(json_wtr);
2150 jsonw_string_field(json_wtr, "metric", metrics[m].name);
2151 jsonw_lluint_field(json_wtr, "run_cnt", profile_total_count);
2152 jsonw_lluint_field(json_wtr, "value", metrics[m].val.counter);
2153 jsonw_lluint_field(json_wtr, "enabled", metrics[m].val.enabled);
2154 jsonw_lluint_field(json_wtr, "running", metrics[m].val.running);
2155
2156 jsonw_end_object(json_wtr);
2157 }
2158 jsonw_end_array(json_wtr);
2159 }
2160
2161 static void profile_print_readings_plain(void)
2162 {
2163 __u32 m;
2164
2165 printf("\n%18llu %-20s\n", profile_total_count, "run_cnt");
2166 for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2167 struct bpf_perf_event_value *val = &metrics[m].val;
2168 int r;
2169
2170 if (!metrics[m].selected)
2171 continue;
2172 printf("%18llu %-20s", val->counter, metrics[m].name);
2173
2174 r = metrics[m].ratio_metric - 1;
2175 if (r >= 0 && metrics[r].selected &&
2176 metrics[r].val.counter > 0) {
2177 printf("# %8.2f %-30s",
2178 val->counter * metrics[m].ratio_mul /
2179 metrics[r].val.counter,
2180 metrics[m].ratio_desc);
2181 } else {
2182 printf("%-41s", "");
2183 }
2184
2185 if (val->enabled > val->running)
2186 printf("(%4.2f%%)",
2187 val->running * 100.0 / val->enabled);
2188 printf("\n");
2189 }
2190 }
2191
2192 static void profile_print_readings(void)
2193 {
2194 if (json_output)
2195 profile_print_readings_json();
2196 else
2197 profile_print_readings_plain();
2198 }
2199
2200 static char *profile_target_name(int tgt_fd)
2201 {
2202 struct bpf_func_info func_info;
2203 struct bpf_prog_info info = {};
2204 __u32 info_len = sizeof(info);
2205 const struct btf_type *t;
2206 __u32 func_info_rec_size;
2207 struct btf *btf = NULL;
2208 char *name = NULL;
2209 int err;
2210
2211 err = bpf_prog_get_info_by_fd(tgt_fd, &info, &info_len);
2212 if (err) {
2213 p_err("failed to get info for prog FD %d", tgt_fd);
2214 goto out;
2215 }
2216
2217 if (info.btf_id == 0) {
2218 p_err("prog FD %d doesn't have valid btf", tgt_fd);
2219 goto out;
2220 }
2221
2222 func_info_rec_size = info.func_info_rec_size;
2223 if (info.nr_func_info == 0) {
2224 p_err("found 0 func_info for prog FD %d", tgt_fd);
2225 goto out;
2226 }
2227
2228 memset(&info, 0, sizeof(info));
2229 info.nr_func_info = 1;
2230 info.func_info_rec_size = func_info_rec_size;
2231 info.func_info = ptr_to_u64(&func_info);
2232
2233 err = bpf_prog_get_info_by_fd(tgt_fd, &info, &info_len);
2234 if (err) {
2235 p_err("failed to get func_info for prog FD %d", tgt_fd);
2236 goto out;
2237 }
2238
2239 btf = btf__load_from_kernel_by_id(info.btf_id);
2240 if (!btf) {
2241 p_err("failed to load btf for prog FD %d", tgt_fd);
2242 goto out;
2243 }
2244
2245 t = btf__type_by_id(btf, func_info.type_id);
2246 if (!t) {
2247 p_err("btf %d doesn't have type %d",
2248 info.btf_id, func_info.type_id);
2249 goto out;
2250 }
2251 name = strdup(btf__name_by_offset(btf, t->name_off));
2252 out:
2253 btf__free(btf);
2254 return name;
2255 }
2256
2257 static struct profiler_bpf *profile_obj;
2258 static int profile_tgt_fd = -1;
2259 static char *profile_tgt_name;
2260 static int *profile_perf_events;
2261 static int profile_perf_event_cnt;
2262
2263 static void profile_close_perf_events(struct profiler_bpf *obj)
2264 {
2265 int i;
2266
2267 for (i = profile_perf_event_cnt - 1; i >= 0; i--)
2268 close(profile_perf_events[i]);
2269
2270 free(profile_perf_events);
2271 profile_perf_event_cnt = 0;
2272 }
2273
2274 static int profile_open_perf_event(int mid, int cpu, int map_fd)
2275 {
2276 int pmu_fd;
2277
2278 pmu_fd = syscall(__NR_perf_event_open, &metrics[mid].attr,
2279 -1 /*pid*/, cpu, -1 /*group_fd*/, 0);
2280 if (pmu_fd < 0) {
2281 if (errno == ENODEV) {
2282 p_info("cpu %d may be offline, skip %s profiling.",
2283 cpu, metrics[mid].name);
2284 profile_perf_event_cnt++;
2285 return 0;
2286 }
2287 return -1;
2288 }
2289
2290 if (bpf_map_update_elem(map_fd,
2291 &profile_perf_event_cnt,
2292 &pmu_fd, BPF_ANY) ||
2293 ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0)) {
2294 close(pmu_fd);
2295 return -1;
2296 }
2297
2298 profile_perf_events[profile_perf_event_cnt++] = pmu_fd;
2299 return 0;
2300 }
2301
2302 static int profile_open_perf_events(struct profiler_bpf *obj)
2303 {
2304 unsigned int cpu, m;
2305 int map_fd;
2306
2307 profile_perf_events = calloc(
2308 obj->rodata->num_cpu * obj->rodata->num_metric, sizeof(int));
2309 if (!profile_perf_events) {
2310 p_err("failed to allocate memory for perf_event array: %s",
2311 strerror(errno));
2312 return -1;
2313 }
2314 map_fd = bpf_map__fd(obj->maps.events);
2315 if (map_fd < 0) {
2316 p_err("failed to get fd for events map");
2317 return -1;
2318 }
2319
2320 for (m = 0; m < ARRAY_SIZE(metrics); m++) {
2321 if (!metrics[m].selected)
2322 continue;
2323 for (cpu = 0; cpu < obj->rodata->num_cpu; cpu++) {
2324 if (profile_open_perf_event(m, cpu, map_fd)) {
2325 p_err("failed to create event %s on cpu %d",
2326 metrics[m].name, cpu);
2327 return -1;
2328 }
2329 }
2330 }
2331 return 0;
2332 }
2333
2334 static void profile_print_and_cleanup(void)
2335 {
2336 profile_close_perf_events(profile_obj);
2337 profile_read_values(profile_obj);
2338 profile_print_readings();
2339 profiler_bpf__destroy(profile_obj);
2340
2341 close(profile_tgt_fd);
2342 free(profile_tgt_name);
2343 }
2344
2345 static void int_exit(int signo)
2346 {
2347 profile_print_and_cleanup();
2348 exit(0);
2349 }
2350
2351 static int do_profile(int argc, char **argv)
2352 {
2353 int num_metric, num_cpu, err = -1;
2354 struct bpf_program *prog;
2355 unsigned long duration;
2356 char *endptr;
2357
2358 /* we at least need two args for the prog and one metric */
2359 if (!REQ_ARGS(3))
2360 return -EINVAL;
2361
2362 /* parse target fd */
2363 profile_tgt_fd = prog_parse_fd(&argc, &argv);
2364 if (profile_tgt_fd < 0) {
2365 p_err("failed to parse fd");
2366 return -1;
2367 }
2368
2369 /* parse profiling optional duration */
2370 if (argc > 2 && is_prefix(argv[0], "duration")) {
2371 NEXT_ARG();
2372 duration = strtoul(*argv, &endptr, 0);
2373 if (*endptr)
2374 usage();
2375 NEXT_ARG();
2376 } else {
2377 duration = UINT_MAX;
2378 }
2379
2380 num_metric = profile_parse_metrics(argc, argv);
2381 if (num_metric <= 0)
2382 goto out;
2383
2384 num_cpu = libbpf_num_possible_cpus();
2385 if (num_cpu <= 0) {
2386 p_err("failed to identify number of CPUs");
2387 goto out;
2388 }
2389
2390 profile_obj = profiler_bpf__open();
2391 if (!profile_obj) {
2392 p_err("failed to open and/or load BPF object");
2393 goto out;
2394 }
2395
2396 profile_obj->rodata->num_cpu = num_cpu;
2397 profile_obj->rodata->num_metric = num_metric;
2398
2399 /* adjust map sizes */
2400 bpf_map__set_max_entries(profile_obj->maps.events, num_metric * num_cpu);
2401 bpf_map__set_max_entries(profile_obj->maps.fentry_readings, num_metric);
2402 bpf_map__set_max_entries(profile_obj->maps.accum_readings, num_metric);
2403 bpf_map__set_max_entries(profile_obj->maps.counts, 1);
2404
2405 /* change target name */
2406 profile_tgt_name = profile_target_name(profile_tgt_fd);
2407 if (!profile_tgt_name)
2408 goto out;
2409
2410 bpf_object__for_each_program(prog, profile_obj->obj) {
2411 err = bpf_program__set_attach_target(prog, profile_tgt_fd,
2412 profile_tgt_name);
2413 if (err) {
2414 p_err("failed to set attach target\n");
2415 goto out;
2416 }
2417 }
2418
2419 set_max_rlimit();
2420 err = profiler_bpf__load(profile_obj);
2421 if (err) {
2422 p_err("failed to load profile_obj");
2423 goto out;
2424 }
2425
2426 err = profile_open_perf_events(profile_obj);
2427 if (err)
2428 goto out;
2429
2430 err = profiler_bpf__attach(profile_obj);
2431 if (err) {
2432 p_err("failed to attach profile_obj");
2433 goto out;
2434 }
2435 signal(SIGINT, int_exit);
2436
2437 sleep(duration);
2438 profile_print_and_cleanup();
2439 return 0;
2440
2441 out:
2442 profile_close_perf_events(profile_obj);
2443 if (profile_obj)
2444 profiler_bpf__destroy(profile_obj);
2445 close(profile_tgt_fd);
2446 free(profile_tgt_name);
2447 return err;
2448 }
2449
2450 #endif /* BPFTOOL_WITHOUT_SKELETONS */
2451
2452 static int do_help(int argc, char **argv)
2453 {
2454 if (json_output) {
2455 jsonw_null(json_wtr);
2456 return 0;
2457 }
2458
2459 fprintf(stderr,
2460 "Usage: %1$s %2$s { show | list } [PROG]\n"
2461 " %1$s %2$s dump xlated PROG [{ file FILE | [opcodes] [linum] [visual] }]\n"
2462 " %1$s %2$s dump jited PROG [{ file FILE | [opcodes] [linum] }]\n"
2463 " %1$s %2$s pin PROG FILE\n"
2464 " %1$s %2$s { load | loadall } OBJ PATH \\\n"
2465 " [type TYPE] [{ offload_dev | xdpmeta_dev } NAME] \\\n"
2466 " [map { idx IDX | name NAME } MAP]\\\n"
2467 " [pinmaps MAP_DIR]\n"
2468 " [autoattach]\n"
2469 " %1$s %2$s attach PROG ATTACH_TYPE [MAP]\n"
2470 " %1$s %2$s detach PROG ATTACH_TYPE [MAP]\n"
2471 " %1$s %2$s run PROG \\\n"
2472 " data_in FILE \\\n"
2473 " [data_out FILE [data_size_out L]] \\\n"
2474 " [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n"
2475 " [repeat N]\n"
2476 " %1$s %2$s profile PROG [duration DURATION] METRICs\n"
2477 " %1$s %2$s tracelog\n"
2478 " %1$s %2$s help\n"
2479 "\n"
2480 " " HELP_SPEC_MAP "\n"
2481 " " HELP_SPEC_PROGRAM "\n"
2482 " TYPE := { socket | kprobe | kretprobe | classifier | action |\n"
2483 " tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n"
2484 " cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n"
2485 " lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n"
2486 " sk_reuseport | flow_dissector | cgroup/sysctl |\n"
2487 " cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"
2488 " cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"
2489 " cgroup/connect_unix | cgroup/getpeername4 | cgroup/getpeername6 |\n"
2490 " cgroup/getpeername_unix | cgroup/getsockname4 | cgroup/getsockname6 |\n"
2491 " cgroup/getsockname_unix | cgroup/sendmsg4 | cgroup/sendmsg6 |\n"
2492 " cgroup/sendmsg_unix | cgroup/recvmsg4 | cgroup/recvmsg6 | cgroup/recvmsg_unix |\n"
2493 " cgroup/getsockopt | cgroup/setsockopt | cgroup/sock_release |\n"
2494 " struct_ops | fentry | fexit | freplace | sk_lookup }\n"
2495 " ATTACH_TYPE := { sk_msg_verdict | sk_skb_verdict | sk_skb_stream_verdict |\n"
2496 " sk_skb_stream_parser | flow_dissector }\n"
2497 " METRIC := { cycles | instructions | l1d_loads | llc_misses | itlb_misses | dtlb_misses }\n"
2498 " " HELP_SPEC_OPTIONS " |\n"
2499 " {-f|--bpffs} | {-m|--mapcompat} | {-n|--nomount} |\n"
2500 " {-L|--use-loader} }\n"
2501 "",
2502 bin_name, argv[-2]);
2503
2504 return 0;
2505 }
2506
2507 static const struct cmd cmds[] = {
2508 { "show", do_show },
2509 { "list", do_show },
2510 { "help", do_help },
2511 { "dump", do_dump },
2512 { "pin", do_pin },
2513 { "load", do_load },
2514 { "loadall", do_loadall },
2515 { "attach", do_attach },
2516 { "detach", do_detach },
2517 { "tracelog", do_tracelog },
2518 { "run", do_run },
2519 { "profile", do_profile },
2520 { 0 }
2521 };
2522
2523 int do_prog(int argc, char **argv)
2524 {
2525 return cmd_select(cmds, argc, argv, do_help);
2526 }
2527
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