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