1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
8 #include <linux/kernel.h>
15 #include <sys/types.h>
20 #include <bpf/hashmap.h>
22 #include "json_writer.h"
25 const char * const map_type_name[] = {
26 [BPF_MAP_TYPE_UNSPEC] = "unspec",
27 [BPF_MAP_TYPE_HASH] = "hash",
28 [BPF_MAP_TYPE_ARRAY] = "array",
29 [BPF_MAP_TYPE_PROG_ARRAY] = "prog_array",
30 [BPF_MAP_TYPE_PERF_EVENT_ARRAY] = "perf_event_array",
31 [BPF_MAP_TYPE_PERCPU_HASH] = "percpu_hash",
32 [BPF_MAP_TYPE_PERCPU_ARRAY] = "percpu_array",
33 [BPF_MAP_TYPE_STACK_TRACE] = "stack_trace",
34 [BPF_MAP_TYPE_CGROUP_ARRAY] = "cgroup_array",
35 [BPF_MAP_TYPE_LRU_HASH] = "lru_hash",
36 [BPF_MAP_TYPE_LRU_PERCPU_HASH] = "lru_percpu_hash",
37 [BPF_MAP_TYPE_LPM_TRIE] = "lpm_trie",
38 [BPF_MAP_TYPE_ARRAY_OF_MAPS] = "array_of_maps",
39 [BPF_MAP_TYPE_HASH_OF_MAPS] = "hash_of_maps",
40 [BPF_MAP_TYPE_DEVMAP] = "devmap",
41 [BPF_MAP_TYPE_DEVMAP_HASH] = "devmap_hash",
42 [BPF_MAP_TYPE_SOCKMAP] = "sockmap",
43 [BPF_MAP_TYPE_CPUMAP] = "cpumap",
44 [BPF_MAP_TYPE_XSKMAP] = "xskmap",
45 [BPF_MAP_TYPE_SOCKHASH] = "sockhash",
46 [BPF_MAP_TYPE_CGROUP_STORAGE] = "cgroup_storage",
47 [BPF_MAP_TYPE_REUSEPORT_SOCKARRAY] = "reuseport_sockarray",
48 [BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE] = "percpu_cgroup_storage",
49 [BPF_MAP_TYPE_QUEUE] = "queue",
50 [BPF_MAP_TYPE_STACK] = "stack",
51 [BPF_MAP_TYPE_SK_STORAGE] = "sk_storage",
52 [BPF_MAP_TYPE_STRUCT_OPS] = "struct_ops",
53 [BPF_MAP_TYPE_RINGBUF] = "ringbuf",
54 [BPF_MAP_TYPE_INODE_STORAGE] = "inode_storage",
55 [BPF_MAP_TYPE_TASK_STORAGE] = "task_storage",
56 [BPF_MAP_TYPE_BLOOM_FILTER] = "bloom_filter",
59 const size_t map_type_name_size = ARRAY_SIZE(map_type_name);
61 static struct hashmap *map_table;
63 static bool map_is_per_cpu(__u32 type)
65 return type == BPF_MAP_TYPE_PERCPU_HASH ||
66 type == BPF_MAP_TYPE_PERCPU_ARRAY ||
67 type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
68 type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE;
71 static bool map_is_map_of_maps(__u32 type)
73 return type == BPF_MAP_TYPE_ARRAY_OF_MAPS ||
74 type == BPF_MAP_TYPE_HASH_OF_MAPS;
77 static bool map_is_map_of_progs(__u32 type)
79 return type == BPF_MAP_TYPE_PROG_ARRAY;
82 static int map_type_from_str(const char *type)
86 for (i = 0; i < ARRAY_SIZE(map_type_name); i++)
87 /* Don't allow prefixing in case of possible future shadowing */
88 if (map_type_name[i] && !strcmp(map_type_name[i], type))
93 static void *alloc_value(struct bpf_map_info *info)
95 if (map_is_per_cpu(info->type))
96 return malloc(round_up(info->value_size, 8) *
99 return malloc(info->value_size);
102 static int do_dump_btf(const struct btf_dumper *d,
103 struct bpf_map_info *map_info, void *key,
109 /* start of key-value pair */
110 jsonw_start_object(d->jw);
112 if (map_info->btf_key_type_id) {
113 jsonw_name(d->jw, "key");
115 ret = btf_dumper_type(d, map_info->btf_key_type_id, key);
120 value_id = map_info->btf_vmlinux_value_type_id ?
121 : map_info->btf_value_type_id;
123 if (!map_is_per_cpu(map_info->type)) {
124 jsonw_name(d->jw, "value");
125 ret = btf_dumper_type(d, value_id, value);
127 unsigned int i, n, step;
129 jsonw_name(d->jw, "values");
130 jsonw_start_array(d->jw);
131 n = get_possible_cpus();
132 step = round_up(map_info->value_size, 8);
133 for (i = 0; i < n; i++) {
134 jsonw_start_object(d->jw);
135 jsonw_int_field(d->jw, "cpu", i);
136 jsonw_name(d->jw, "value");
137 ret = btf_dumper_type(d, value_id, value + i * step);
138 jsonw_end_object(d->jw);
142 jsonw_end_array(d->jw);
146 /* end of key-value pair */
147 jsonw_end_object(d->jw);
152 static json_writer_t *get_btf_writer(void)
154 json_writer_t *jw = jsonw_new(stdout);
158 jsonw_pretty(jw, true);
163 static void print_entry_json(struct bpf_map_info *info, unsigned char *key,
164 unsigned char *value, struct btf *btf)
166 jsonw_start_object(json_wtr);
168 if (!map_is_per_cpu(info->type)) {
169 jsonw_name(json_wtr, "key");
170 print_hex_data_json(key, info->key_size);
171 jsonw_name(json_wtr, "value");
172 print_hex_data_json(value, info->value_size);
174 struct btf_dumper d = {
177 .is_plain_text = false,
180 jsonw_name(json_wtr, "formatted");
181 do_dump_btf(&d, info, key, value);
184 unsigned int i, n, step;
186 n = get_possible_cpus();
187 step = round_up(info->value_size, 8);
189 jsonw_name(json_wtr, "key");
190 print_hex_data_json(key, info->key_size);
192 jsonw_name(json_wtr, "values");
193 jsonw_start_array(json_wtr);
194 for (i = 0; i < n; i++) {
195 jsonw_start_object(json_wtr);
197 jsonw_int_field(json_wtr, "cpu", i);
199 jsonw_name(json_wtr, "value");
200 print_hex_data_json(value + i * step,
203 jsonw_end_object(json_wtr);
205 jsonw_end_array(json_wtr);
207 struct btf_dumper d = {
210 .is_plain_text = false,
213 jsonw_name(json_wtr, "formatted");
214 do_dump_btf(&d, info, key, value);
218 jsonw_end_object(json_wtr);
222 print_entry_error_msg(struct bpf_map_info *info, unsigned char *key,
223 const char *error_msg)
225 int msg_size = strlen(error_msg);
226 bool single_line, break_names;
228 break_names = info->key_size > 16 || msg_size > 16;
229 single_line = info->key_size + msg_size <= 24 && !break_names;
231 printf("key:%c", break_names ? '\n' : ' ');
232 fprint_hex(stdout, key, info->key_size, " ");
234 printf(single_line ? " " : "\n");
236 printf("value:%c%s", break_names ? '\n' : ' ', error_msg);
242 print_entry_error(struct bpf_map_info *map_info, void *key, int lookup_errno)
244 /* For prog_array maps or arrays of maps, failure to lookup the value
245 * means there is no entry for that key. Do not print an error message
248 if ((map_is_map_of_maps(map_info->type) ||
249 map_is_map_of_progs(map_info->type)) && lookup_errno == ENOENT)
253 jsonw_start_object(json_wtr); /* entry */
254 jsonw_name(json_wtr, "key");
255 print_hex_data_json(key, map_info->key_size);
256 jsonw_name(json_wtr, "value");
257 jsonw_start_object(json_wtr); /* error */
258 jsonw_string_field(json_wtr, "error", strerror(lookup_errno));
259 jsonw_end_object(json_wtr); /* error */
260 jsonw_end_object(json_wtr); /* entry */
262 const char *msg = NULL;
264 if (lookup_errno == ENOENT)
266 else if (lookup_errno == ENOSPC &&
267 map_info->type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY)
268 msg = "<cannot read>";
270 print_entry_error_msg(map_info, key,
271 msg ? : strerror(lookup_errno));
275 static void print_entry_plain(struct bpf_map_info *info, unsigned char *key,
276 unsigned char *value)
278 if (!map_is_per_cpu(info->type)) {
279 bool single_line, break_names;
281 break_names = info->key_size > 16 || info->value_size > 16;
282 single_line = info->key_size + info->value_size <= 24 &&
285 if (info->key_size) {
286 printf("key:%c", break_names ? '\n' : ' ');
287 fprint_hex(stdout, key, info->key_size, " ");
289 printf(single_line ? " " : "\n");
292 if (info->value_size) {
293 printf("value:%c", break_names ? '\n' : ' ');
294 fprint_hex(stdout, value, info->value_size, " ");
299 unsigned int i, n, step;
301 n = get_possible_cpus();
302 step = round_up(info->value_size, 8);
304 if (info->key_size) {
306 fprint_hex(stdout, key, info->key_size, " ");
309 if (info->value_size) {
310 for (i = 0; i < n; i++) {
311 printf("value (CPU %02d):%c",
312 i, info->value_size > 16 ? '\n' : ' ');
313 fprint_hex(stdout, value + i * step,
314 info->value_size, " ");
321 static char **parse_bytes(char **argv, const char *name, unsigned char *val,
324 unsigned int i = 0, base = 0;
327 if (is_prefix(*argv, "hex")) {
332 while (i < n && argv[i]) {
333 val[i] = strtoul(argv[i], &endptr, base);
335 p_err("error parsing byte: %s", argv[i]);
342 p_err("%s expected %d bytes got %d", name, n, i);
349 /* on per cpu maps we must copy the provided value on all value instances */
350 static void fill_per_cpu_value(struct bpf_map_info *info, void *value)
352 unsigned int i, n, step;
354 if (!map_is_per_cpu(info->type))
357 n = get_possible_cpus();
358 step = round_up(info->value_size, 8);
359 for (i = 1; i < n; i++)
360 memcpy(value + i * step, value, info->value_size);
363 static int parse_elem(char **argv, struct bpf_map_info *info,
364 void *key, void *value, __u32 key_size, __u32 value_size,
365 __u32 *flags, __u32 **value_fd)
370 p_err("did not find %s", key ? "key" : "value");
374 if (is_prefix(*argv, "key")) {
377 p_err("duplicate key");
379 p_err("unnecessary key");
383 argv = parse_bytes(argv + 1, "key", key, key_size);
387 return parse_elem(argv, info, NULL, value, key_size, value_size,
389 } else if (is_prefix(*argv, "value")) {
394 p_err("duplicate value");
396 p_err("unnecessary value");
402 if (map_is_map_of_maps(info->type)) {
405 if (value_size != 4) {
406 p_err("value smaller than 4B for map in map?");
409 if (!argv[0] || !argv[1]) {
410 p_err("not enough value arguments for map in map");
414 fd = map_parse_fd(&argc, &argv);
420 } else if (map_is_map_of_progs(info->type)) {
423 if (value_size != 4) {
424 p_err("value smaller than 4B for map of progs?");
427 if (!argv[0] || !argv[1]) {
428 p_err("not enough value arguments for map of progs");
431 if (is_prefix(*argv, "id"))
432 p_info("Warning: updating program array via MAP_ID, make sure this map is kept open\n"
433 " by some process or pinned otherwise update will be lost");
435 fd = prog_parse_fd(&argc, &argv);
442 argv = parse_bytes(argv, "value", value, value_size);
446 fill_per_cpu_value(info, value);
449 return parse_elem(argv, info, key, NULL, key_size, value_size,
451 } else if (is_prefix(*argv, "any") || is_prefix(*argv, "noexist") ||
452 is_prefix(*argv, "exist")) {
454 p_err("flags specified multiple times: %s", *argv);
458 if (is_prefix(*argv, "any"))
460 else if (is_prefix(*argv, "noexist"))
461 *flags = BPF_NOEXIST;
462 else if (is_prefix(*argv, "exist"))
465 return parse_elem(argv + 1, info, key, value, key_size,
466 value_size, NULL, value_fd);
469 p_err("expected key or value, got: %s", *argv);
473 static void show_map_header_json(struct bpf_map_info *info, json_writer_t *wtr)
475 jsonw_uint_field(wtr, "id", info->id);
476 if (info->type < ARRAY_SIZE(map_type_name))
477 jsonw_string_field(wtr, "type", map_type_name[info->type]);
479 jsonw_uint_field(wtr, "type", info->type);
482 jsonw_string_field(wtr, "name", info->name);
484 jsonw_name(wtr, "flags");
485 jsonw_printf(wtr, "%d", info->map_flags);
488 static int show_map_close_json(int fd, struct bpf_map_info *info)
490 char *memlock, *frozen_str;
493 memlock = get_fdinfo(fd, "memlock");
494 frozen_str = get_fdinfo(fd, "frozen");
496 jsonw_start_object(json_wtr);
498 show_map_header_json(info, json_wtr);
500 print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);
502 jsonw_uint_field(json_wtr, "bytes_key", info->key_size);
503 jsonw_uint_field(json_wtr, "bytes_value", info->value_size);
504 jsonw_uint_field(json_wtr, "max_entries", info->max_entries);
507 jsonw_int_field(json_wtr, "bytes_memlock", atoll(memlock));
510 if (info->type == BPF_MAP_TYPE_PROG_ARRAY) {
511 char *owner_prog_type = get_fdinfo(fd, "owner_prog_type");
512 char *owner_jited = get_fdinfo(fd, "owner_jited");
514 if (owner_prog_type) {
515 unsigned int prog_type = atoi(owner_prog_type);
516 const char *prog_type_str;
518 prog_type_str = libbpf_bpf_prog_type_str(prog_type);
520 jsonw_string_field(json_wtr, "owner_prog_type",
523 jsonw_uint_field(json_wtr, "owner_prog_type",
527 jsonw_bool_field(json_wtr, "owner_jited",
528 !!atoi(owner_jited));
530 free(owner_prog_type);
536 frozen = atoi(frozen_str);
539 jsonw_int_field(json_wtr, "frozen", frozen);
542 jsonw_int_field(json_wtr, "btf_id", info->btf_id);
544 if (!hashmap__empty(map_table)) {
545 struct hashmap_entry *entry;
547 jsonw_name(json_wtr, "pinned");
548 jsonw_start_array(json_wtr);
549 hashmap__for_each_key_entry(map_table, entry,
550 u32_as_hash_field(info->id))
551 jsonw_string(json_wtr, entry->value);
552 jsonw_end_array(json_wtr);
555 emit_obj_refs_json(refs_table, info->id, json_wtr);
557 jsonw_end_object(json_wtr);
562 static void show_map_header_plain(struct bpf_map_info *info)
564 printf("%u: ", info->id);
565 if (info->type < ARRAY_SIZE(map_type_name))
566 printf("%s ", map_type_name[info->type]);
568 printf("type %u ", info->type);
571 printf("name %s ", info->name);
573 printf("flags 0x%x", info->map_flags);
574 print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
578 static int show_map_close_plain(int fd, struct bpf_map_info *info)
580 char *memlock, *frozen_str;
583 memlock = get_fdinfo(fd, "memlock");
584 frozen_str = get_fdinfo(fd, "frozen");
586 show_map_header_plain(info);
587 printf("\tkey %uB value %uB max_entries %u",
588 info->key_size, info->value_size, info->max_entries);
591 printf(" memlock %sB", memlock);
594 if (info->type == BPF_MAP_TYPE_PROG_ARRAY) {
595 char *owner_prog_type = get_fdinfo(fd, "owner_prog_type");
596 char *owner_jited = get_fdinfo(fd, "owner_jited");
598 if (owner_prog_type || owner_jited)
600 if (owner_prog_type) {
601 unsigned int prog_type = atoi(owner_prog_type);
602 const char *prog_type_str;
604 prog_type_str = libbpf_bpf_prog_type_str(prog_type);
606 printf("owner_prog_type %s ", prog_type_str);
608 printf("owner_prog_type %d ", prog_type);
611 printf("owner%s jited",
612 atoi(owner_jited) ? "" : " not");
614 free(owner_prog_type);
619 if (!hashmap__empty(map_table)) {
620 struct hashmap_entry *entry;
622 hashmap__for_each_key_entry(map_table, entry,
623 u32_as_hash_field(info->id))
624 printf("\n\tpinned %s", (char *)entry->value);
628 frozen = atoi(frozen_str);
632 if (info->btf_id || frozen)
636 printf("btf_id %d", info->btf_id);
639 printf("%sfrozen", info->btf_id ? " " : "");
641 emit_obj_refs_plain(refs_table, info->id, "\n\tpids ");
647 static int do_show_subset(int argc, char **argv)
649 struct bpf_map_info info = {};
650 __u32 len = sizeof(info);
655 fds = malloc(sizeof(int));
657 p_err("mem alloc failed");
660 nb_fds = map_parse_fds(&argc, &argv, &fds);
664 if (json_output && nb_fds > 1)
665 jsonw_start_array(json_wtr); /* root array */
666 for (i = 0; i < nb_fds; i++) {
667 err = bpf_obj_get_info_by_fd(fds[i], &info, &len);
669 p_err("can't get map info: %s",
671 for (; i < nb_fds; i++)
677 show_map_close_json(fds[i], &info);
679 show_map_close_plain(fds[i], &info);
683 if (json_output && nb_fds > 1)
684 jsonw_end_array(json_wtr); /* root array */
691 static int do_show(int argc, char **argv)
693 struct bpf_map_info info = {};
694 __u32 len = sizeof(info);
700 map_table = hashmap__new(hash_fn_for_key_as_id,
701 equal_fn_for_key_as_id, NULL);
702 if (IS_ERR(map_table)) {
703 p_err("failed to create hashmap for pinned paths");
706 build_pinned_obj_table(map_table, BPF_OBJ_MAP);
708 build_obj_refs_table(&refs_table, BPF_OBJ_MAP);
711 return do_show_subset(argc, argv);
717 jsonw_start_array(json_wtr);
719 err = bpf_map_get_next_id(id, &id);
723 p_err("can't get next map: %s%s", strerror(errno),
724 errno == EINVAL ? " -- kernel too old?" : "");
728 fd = bpf_map_get_fd_by_id(id);
732 p_err("can't get map by id (%u): %s",
733 id, strerror(errno));
737 err = bpf_obj_get_info_by_fd(fd, &info, &len);
739 p_err("can't get map info: %s", strerror(errno));
745 show_map_close_json(fd, &info);
747 show_map_close_plain(fd, &info);
750 jsonw_end_array(json_wtr);
752 delete_obj_refs_table(refs_table);
755 delete_pinned_obj_table(map_table);
757 return errno == ENOENT ? 0 : -1;
760 static int dump_map_elem(int fd, void *key, void *value,
761 struct bpf_map_info *map_info, struct btf *btf,
762 json_writer_t *btf_wtr)
764 if (bpf_map_lookup_elem(fd, key, value)) {
765 print_entry_error(map_info, key, errno);
770 print_entry_json(map_info, key, value, btf);
772 struct btf_dumper d = {
775 .is_plain_text = true,
778 do_dump_btf(&d, map_info, key, value);
780 print_entry_plain(map_info, key, value);
786 static int maps_have_btf(int *fds, int nb_fds)
788 struct bpf_map_info info = {};
789 __u32 len = sizeof(info);
792 for (i = 0; i < nb_fds; i++) {
793 err = bpf_obj_get_info_by_fd(fds[i], &info, &len);
795 p_err("can't get map info: %s", strerror(errno));
806 static struct btf *btf_vmlinux;
808 static int get_map_kv_btf(const struct bpf_map_info *info, struct btf **btf)
812 if (info->btf_vmlinux_value_type_id) {
814 btf_vmlinux = libbpf_find_kernel_btf();
815 err = libbpf_get_error(btf_vmlinux);
817 p_err("failed to get kernel btf");
822 } else if (info->btf_value_type_id) {
823 *btf = btf__load_from_kernel_by_id(info->btf_id);
824 err = libbpf_get_error(*btf);
826 p_err("failed to get btf");
834 static void free_map_kv_btf(struct btf *btf)
836 if (!libbpf_get_error(btf) && btf != btf_vmlinux)
840 static void free_btf_vmlinux(void)
842 if (!libbpf_get_error(btf_vmlinux))
843 btf__free(btf_vmlinux);
847 map_dump(int fd, struct bpf_map_info *info, json_writer_t *wtr,
850 void *key, *value, *prev_key;
851 unsigned int num_elems = 0;
852 struct btf *btf = NULL;
855 key = malloc(info->key_size);
856 value = alloc_value(info);
857 if (!key || !value) {
858 p_err("mem alloc failed");
866 err = get_map_kv_btf(info, &btf);
872 jsonw_start_object(wtr); /* map object */
873 show_map_header_json(info, wtr);
874 jsonw_name(wtr, "elements");
876 jsonw_start_array(wtr); /* elements */
877 } else if (show_header) {
878 show_map_header_plain(info);
881 if (info->type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY &&
882 info->value_size != 8)
883 p_info("Warning: cannot read values from %s map with value_size != 8",
884 map_type_name[info->type]);
886 err = bpf_map_get_next_key(fd, prev_key, key);
892 if (!dump_map_elem(fd, key, value, info, btf, wtr))
898 jsonw_end_array(wtr); /* elements */
900 jsonw_end_object(wtr); /* map object */
902 printf("Found %u element%s\n", num_elems,
903 num_elems != 1 ? "s" : "");
910 free_map_kv_btf(btf);
915 static int do_dump(int argc, char **argv)
917 json_writer_t *wtr = NULL, *btf_wtr = NULL;
918 struct bpf_map_info info = {};
920 __u32 len = sizeof(info);
927 fds = malloc(sizeof(int));
929 p_err("mem alloc failed");
932 nb_fds = map_parse_fds(&argc, &argv, &fds);
941 do_plain_btf = maps_have_btf(fds, nb_fds);
942 if (do_plain_btf < 0)
946 btf_wtr = get_btf_writer();
949 p_info("failed to create json writer for btf. falling back to plain output");
953 if (wtr && nb_fds > 1)
954 jsonw_start_array(wtr); /* root array */
955 for (i = 0; i < nb_fds; i++) {
956 if (bpf_obj_get_info_by_fd(fds[i], &info, &len)) {
957 p_err("can't get map info: %s", strerror(errno));
960 err = map_dump(fds[i], &info, wtr, nb_fds > 1);
961 if (!wtr && i != nb_fds - 1)
968 if (wtr && nb_fds > 1)
969 jsonw_end_array(wtr); /* root array */
972 jsonw_destroy(&btf_wtr);
974 for (; i < nb_fds; i++)
982 static int alloc_key_value(struct bpf_map_info *info, void **key, void **value)
987 if (info->key_size) {
988 *key = malloc(info->key_size);
990 p_err("key mem alloc failed");
995 if (info->value_size) {
996 *value = alloc_value(info);
998 p_err("value mem alloc failed");
1008 static int do_update(int argc, char **argv)
1010 struct bpf_map_info info = {};
1011 __u32 len = sizeof(info);
1012 __u32 *value_fd = NULL;
1013 __u32 flags = BPF_ANY;
1020 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1024 err = alloc_key_value(&info, &key, &value);
1028 err = parse_elem(argv, &info, key, value, info.key_size,
1029 info.value_size, &flags, &value_fd);
1033 err = bpf_map_update_elem(fd, key, value, flags);
1035 p_err("update failed: %s", strerror(errno));
1046 if (!err && json_output)
1047 jsonw_null(json_wtr);
1051 static void print_key_value(struct bpf_map_info *info, void *key,
1054 json_writer_t *btf_wtr;
1057 if (get_map_kv_btf(info, &btf))
1061 print_entry_json(info, key, value, btf);
1063 /* if here json_wtr wouldn't have been initialised,
1064 * so let's create separate writer for btf
1066 btf_wtr = get_btf_writer();
1068 p_info("failed to create json writer for btf. falling back to plain output");
1071 print_entry_plain(info, key, value);
1073 struct btf_dumper d = {
1076 .is_plain_text = true,
1079 do_dump_btf(&d, info, key, value);
1080 jsonw_destroy(&btf_wtr);
1083 print_entry_plain(info, key, value);
1088 static int do_lookup(int argc, char **argv)
1090 struct bpf_map_info info = {};
1091 __u32 len = sizeof(info);
1099 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1103 err = alloc_key_value(&info, &key, &value);
1107 err = parse_elem(argv, &info, key, NULL, info.key_size, 0, NULL, NULL);
1111 err = bpf_map_lookup_elem(fd, key, value);
1113 if (errno == ENOENT) {
1115 jsonw_null(json_wtr);
1118 fprint_hex(stdout, key, info.key_size, " ");
1119 printf("\n\nNot found\n");
1122 p_err("lookup failed: %s", strerror(errno));
1128 /* here means bpf_map_lookup_elem() succeeded */
1129 print_key_value(&info, key, value);
1139 static int do_getnext(int argc, char **argv)
1141 struct bpf_map_info info = {};
1142 __u32 len = sizeof(info);
1143 void *key, *nextkey;
1150 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1154 key = malloc(info.key_size);
1155 nextkey = malloc(info.key_size);
1156 if (!key || !nextkey) {
1157 p_err("mem alloc failed");
1163 err = parse_elem(argv, &info, key, NULL, info.key_size, 0,
1172 err = bpf_map_get_next_key(fd, key, nextkey);
1174 p_err("can't get next key: %s", strerror(errno));
1179 jsonw_start_object(json_wtr);
1181 jsonw_name(json_wtr, "key");
1182 print_hex_data_json(key, info.key_size);
1184 jsonw_null_field(json_wtr, "key");
1186 jsonw_name(json_wtr, "next_key");
1187 print_hex_data_json(nextkey, info.key_size);
1188 jsonw_end_object(json_wtr);
1192 fprint_hex(stdout, key, info.key_size, " ");
1195 printf("key: None\n");
1197 printf("next key:\n");
1198 fprint_hex(stdout, nextkey, info.key_size, " ");
1210 static int do_delete(int argc, char **argv)
1212 struct bpf_map_info info = {};
1213 __u32 len = sizeof(info);
1221 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1225 key = malloc(info.key_size);
1227 p_err("mem alloc failed");
1232 err = parse_elem(argv, &info, key, NULL, info.key_size, 0, NULL, NULL);
1236 err = bpf_map_delete_elem(fd, key);
1238 p_err("delete failed: %s", strerror(errno));
1244 if (!err && json_output)
1245 jsonw_null(json_wtr);
1249 static int do_pin(int argc, char **argv)
1253 err = do_pin_any(argc, argv, map_parse_fd);
1254 if (!err && json_output)
1255 jsonw_null(json_wtr);
1259 static int do_create(int argc, char **argv)
1261 LIBBPF_OPTS(bpf_map_create_opts, attr);
1262 enum bpf_map_type map_type = BPF_MAP_TYPE_UNSPEC;
1263 __u32 key_size = 0, value_size = 0, max_entries = 0;
1264 const char *map_name = NULL;
1265 const char *pinfile;
1270 pinfile = GET_ARG();
1276 if (is_prefix(*argv, "type")) {
1280 p_err("map type already specified");
1284 map_type = map_type_from_str(*argv);
1285 if ((int)map_type < 0) {
1286 p_err("unrecognized map type: %s", *argv);
1290 } else if (is_prefix(*argv, "name")) {
1292 map_name = GET_ARG();
1293 } else if (is_prefix(*argv, "key")) {
1294 if (parse_u32_arg(&argc, &argv, &key_size,
1297 } else if (is_prefix(*argv, "value")) {
1298 if (parse_u32_arg(&argc, &argv, &value_size,
1301 } else if (is_prefix(*argv, "entries")) {
1302 if (parse_u32_arg(&argc, &argv, &max_entries,
1305 } else if (is_prefix(*argv, "flags")) {
1306 if (parse_u32_arg(&argc, &argv, &attr.map_flags,
1309 } else if (is_prefix(*argv, "dev")) {
1312 if (attr.map_ifindex) {
1313 p_err("offload device already specified");
1317 attr.map_ifindex = if_nametoindex(*argv);
1318 if (!attr.map_ifindex) {
1319 p_err("unrecognized netdevice '%s': %s",
1320 *argv, strerror(errno));
1324 } else if (is_prefix(*argv, "inner_map")) {
1325 struct bpf_map_info info = {};
1326 __u32 len = sizeof(info);
1332 inner_map_fd = map_parse_fd_and_info(&argc, &argv,
1334 if (inner_map_fd < 0)
1336 attr.inner_map_fd = inner_map_fd;
1338 p_err("unknown arg %s", *argv);
1344 p_err("map name not specified");
1348 fd = bpf_map_create(map_type, map_name, key_size, value_size, max_entries, &attr);
1350 p_err("map create failed: %s", strerror(errno));
1354 err = do_pin_fd(fd, pinfile);
1360 jsonw_null(json_wtr);
1363 if (attr.inner_map_fd > 0)
1364 close(attr.inner_map_fd);
1369 static int do_pop_dequeue(int argc, char **argv)
1371 struct bpf_map_info info = {};
1372 __u32 len = sizeof(info);
1380 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1384 err = alloc_key_value(&info, &key, &value);
1388 err = bpf_map_lookup_and_delete_elem(fd, key, value);
1390 if (errno == ENOENT) {
1392 jsonw_null(json_wtr);
1394 printf("Error: empty map\n");
1396 p_err("pop failed: %s", strerror(errno));
1402 print_key_value(&info, key, value);
1412 static int do_freeze(int argc, char **argv)
1419 fd = map_parse_fd(&argc, &argv);
1428 err = bpf_map_freeze(fd);
1431 p_err("failed to freeze map: %s", strerror(errno));
1436 jsonw_null(json_wtr);
1441 static int do_help(int argc, char **argv)
1444 jsonw_null(json_wtr);
1449 "Usage: %1$s %2$s { show | list } [MAP]\n"
1450 " %1$s %2$s create FILE type TYPE key KEY_SIZE value VALUE_SIZE \\\n"
1451 " entries MAX_ENTRIES name NAME [flags FLAGS] \\\n"
1452 " [inner_map MAP] [dev NAME]\n"
1453 " %1$s %2$s dump MAP\n"
1454 " %1$s %2$s update MAP [key DATA] [value VALUE] [UPDATE_FLAGS]\n"
1455 " %1$s %2$s lookup MAP [key DATA]\n"
1456 " %1$s %2$s getnext MAP [key DATA]\n"
1457 " %1$s %2$s delete MAP key DATA\n"
1458 " %1$s %2$s pin MAP FILE\n"
1459 " %1$s %2$s event_pipe MAP [cpu N index M]\n"
1460 " %1$s %2$s peek MAP\n"
1461 " %1$s %2$s push MAP value VALUE\n"
1462 " %1$s %2$s pop MAP\n"
1463 " %1$s %2$s enqueue MAP value VALUE\n"
1464 " %1$s %2$s dequeue MAP\n"
1465 " %1$s %2$s freeze MAP\n"
1468 " " HELP_SPEC_MAP "\n"
1469 " DATA := { [hex] BYTES }\n"
1470 " " HELP_SPEC_PROGRAM "\n"
1471 " VALUE := { DATA | MAP | PROG }\n"
1472 " UPDATE_FLAGS := { any | exist | noexist }\n"
1473 " TYPE := { hash | array | prog_array | perf_event_array | percpu_hash |\n"
1474 " percpu_array | stack_trace | cgroup_array | lru_hash |\n"
1475 " lru_percpu_hash | lpm_trie | array_of_maps | hash_of_maps |\n"
1476 " devmap | devmap_hash | sockmap | cpumap | xskmap | sockhash |\n"
1477 " cgroup_storage | reuseport_sockarray | percpu_cgroup_storage |\n"
1478 " queue | stack | sk_storage | struct_ops | ringbuf | inode_storage |\n"
1479 " task_storage | bloom_filter }\n"
1480 " " HELP_SPEC_OPTIONS " |\n"
1481 " {-f|--bpffs} | {-n|--nomount} }\n"
1483 bin_name, argv[-2]);
1488 static const struct cmd cmds[] = {
1489 { "show", do_show },
1490 { "list", do_show },
1491 { "help", do_help },
1492 { "dump", do_dump },
1493 { "update", do_update },
1494 { "lookup", do_lookup },
1495 { "getnext", do_getnext },
1496 { "delete", do_delete },
1498 { "event_pipe", do_event_pipe },
1499 { "create", do_create },
1500 { "peek", do_lookup },
1501 { "push", do_update },
1502 { "enqueue", do_update },
1503 { "pop", do_pop_dequeue },
1504 { "dequeue", do_pop_dequeue },
1505 { "freeze", do_freeze },
1509 int do_map(int argc, char **argv)
1511 return cmd_select(cmds, argc, argv, do_help);