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>
21 #include "json_writer.h"
24 const char * const map_type_name[] = {
25 [BPF_MAP_TYPE_UNSPEC] = "unspec",
26 [BPF_MAP_TYPE_HASH] = "hash",
27 [BPF_MAP_TYPE_ARRAY] = "array",
28 [BPF_MAP_TYPE_PROG_ARRAY] = "prog_array",
29 [BPF_MAP_TYPE_PERF_EVENT_ARRAY] = "perf_event_array",
30 [BPF_MAP_TYPE_PERCPU_HASH] = "percpu_hash",
31 [BPF_MAP_TYPE_PERCPU_ARRAY] = "percpu_array",
32 [BPF_MAP_TYPE_STACK_TRACE] = "stack_trace",
33 [BPF_MAP_TYPE_CGROUP_ARRAY] = "cgroup_array",
34 [BPF_MAP_TYPE_LRU_HASH] = "lru_hash",
35 [BPF_MAP_TYPE_LRU_PERCPU_HASH] = "lru_percpu_hash",
36 [BPF_MAP_TYPE_LPM_TRIE] = "lpm_trie",
37 [BPF_MAP_TYPE_ARRAY_OF_MAPS] = "array_of_maps",
38 [BPF_MAP_TYPE_HASH_OF_MAPS] = "hash_of_maps",
39 [BPF_MAP_TYPE_DEVMAP] = "devmap",
40 [BPF_MAP_TYPE_DEVMAP_HASH] = "devmap_hash",
41 [BPF_MAP_TYPE_SOCKMAP] = "sockmap",
42 [BPF_MAP_TYPE_CPUMAP] = "cpumap",
43 [BPF_MAP_TYPE_XSKMAP] = "xskmap",
44 [BPF_MAP_TYPE_SOCKHASH] = "sockhash",
45 [BPF_MAP_TYPE_CGROUP_STORAGE] = "cgroup_storage",
46 [BPF_MAP_TYPE_REUSEPORT_SOCKARRAY] = "reuseport_sockarray",
47 [BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE] = "percpu_cgroup_storage",
48 [BPF_MAP_TYPE_QUEUE] = "queue",
49 [BPF_MAP_TYPE_STACK] = "stack",
50 [BPF_MAP_TYPE_SK_STORAGE] = "sk_storage",
51 [BPF_MAP_TYPE_STRUCT_OPS] = "struct_ops",
52 [BPF_MAP_TYPE_RINGBUF] = "ringbuf",
53 [BPF_MAP_TYPE_INODE_STORAGE] = "inode_storage",
54 [BPF_MAP_TYPE_TASK_STORAGE] = "task_storage",
57 const size_t map_type_name_size = ARRAY_SIZE(map_type_name);
59 static bool map_is_per_cpu(__u32 type)
61 return type == BPF_MAP_TYPE_PERCPU_HASH ||
62 type == BPF_MAP_TYPE_PERCPU_ARRAY ||
63 type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
64 type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE;
67 static bool map_is_map_of_maps(__u32 type)
69 return type == BPF_MAP_TYPE_ARRAY_OF_MAPS ||
70 type == BPF_MAP_TYPE_HASH_OF_MAPS;
73 static bool map_is_map_of_progs(__u32 type)
75 return type == BPF_MAP_TYPE_PROG_ARRAY;
78 static int map_type_from_str(const char *type)
82 for (i = 0; i < ARRAY_SIZE(map_type_name); i++)
83 /* Don't allow prefixing in case of possible future shadowing */
84 if (map_type_name[i] && !strcmp(map_type_name[i], type))
89 static void *alloc_value(struct bpf_map_info *info)
91 if (map_is_per_cpu(info->type))
92 return malloc(round_up(info->value_size, 8) *
95 return malloc(info->value_size);
98 static int do_dump_btf(const struct btf_dumper *d,
99 struct bpf_map_info *map_info, void *key,
105 /* start of key-value pair */
106 jsonw_start_object(d->jw);
108 if (map_info->btf_key_type_id) {
109 jsonw_name(d->jw, "key");
111 ret = btf_dumper_type(d, map_info->btf_key_type_id, key);
116 value_id = map_info->btf_vmlinux_value_type_id ?
117 : map_info->btf_value_type_id;
119 if (!map_is_per_cpu(map_info->type)) {
120 jsonw_name(d->jw, "value");
121 ret = btf_dumper_type(d, value_id, value);
123 unsigned int i, n, step;
125 jsonw_name(d->jw, "values");
126 jsonw_start_array(d->jw);
127 n = get_possible_cpus();
128 step = round_up(map_info->value_size, 8);
129 for (i = 0; i < n; i++) {
130 jsonw_start_object(d->jw);
131 jsonw_int_field(d->jw, "cpu", i);
132 jsonw_name(d->jw, "value");
133 ret = btf_dumper_type(d, value_id, value + i * step);
134 jsonw_end_object(d->jw);
138 jsonw_end_array(d->jw);
142 /* end of key-value pair */
143 jsonw_end_object(d->jw);
148 static json_writer_t *get_btf_writer(void)
150 json_writer_t *jw = jsonw_new(stdout);
154 jsonw_pretty(jw, true);
159 static void print_entry_json(struct bpf_map_info *info, unsigned char *key,
160 unsigned char *value, struct btf *btf)
162 jsonw_start_object(json_wtr);
164 if (!map_is_per_cpu(info->type)) {
165 jsonw_name(json_wtr, "key");
166 print_hex_data_json(key, info->key_size);
167 jsonw_name(json_wtr, "value");
168 print_hex_data_json(value, info->value_size);
170 struct btf_dumper d = {
173 .is_plain_text = false,
176 jsonw_name(json_wtr, "formatted");
177 do_dump_btf(&d, info, key, value);
180 unsigned int i, n, step;
182 n = get_possible_cpus();
183 step = round_up(info->value_size, 8);
185 jsonw_name(json_wtr, "key");
186 print_hex_data_json(key, info->key_size);
188 jsonw_name(json_wtr, "values");
189 jsonw_start_array(json_wtr);
190 for (i = 0; i < n; i++) {
191 jsonw_start_object(json_wtr);
193 jsonw_int_field(json_wtr, "cpu", i);
195 jsonw_name(json_wtr, "value");
196 print_hex_data_json(value + i * step,
199 jsonw_end_object(json_wtr);
201 jsonw_end_array(json_wtr);
203 struct btf_dumper d = {
206 .is_plain_text = false,
209 jsonw_name(json_wtr, "formatted");
210 do_dump_btf(&d, info, key, value);
214 jsonw_end_object(json_wtr);
218 print_entry_error_msg(struct bpf_map_info *info, unsigned char *key,
219 const char *error_msg)
221 int msg_size = strlen(error_msg);
222 bool single_line, break_names;
224 break_names = info->key_size > 16 || msg_size > 16;
225 single_line = info->key_size + msg_size <= 24 && !break_names;
227 printf("key:%c", break_names ? '\n' : ' ');
228 fprint_hex(stdout, key, info->key_size, " ");
230 printf(single_line ? " " : "\n");
232 printf("value:%c%s", break_names ? '\n' : ' ', error_msg);
238 print_entry_error(struct bpf_map_info *map_info, void *key, int lookup_errno)
240 /* For prog_array maps or arrays of maps, failure to lookup the value
241 * means there is no entry for that key. Do not print an error message
244 if ((map_is_map_of_maps(map_info->type) ||
245 map_is_map_of_progs(map_info->type)) && lookup_errno == ENOENT)
249 jsonw_start_object(json_wtr); /* entry */
250 jsonw_name(json_wtr, "key");
251 print_hex_data_json(key, map_info->key_size);
252 jsonw_name(json_wtr, "value");
253 jsonw_start_object(json_wtr); /* error */
254 jsonw_string_field(json_wtr, "error", strerror(lookup_errno));
255 jsonw_end_object(json_wtr); /* error */
256 jsonw_end_object(json_wtr); /* entry */
258 const char *msg = NULL;
260 if (lookup_errno == ENOENT)
262 else if (lookup_errno == ENOSPC &&
263 map_info->type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY)
264 msg = "<cannot read>";
266 print_entry_error_msg(map_info, key,
267 msg ? : strerror(lookup_errno));
271 static void print_entry_plain(struct bpf_map_info *info, unsigned char *key,
272 unsigned char *value)
274 if (!map_is_per_cpu(info->type)) {
275 bool single_line, break_names;
277 break_names = info->key_size > 16 || info->value_size > 16;
278 single_line = info->key_size + info->value_size <= 24 &&
281 if (info->key_size) {
282 printf("key:%c", break_names ? '\n' : ' ');
283 fprint_hex(stdout, key, info->key_size, " ");
285 printf(single_line ? " " : "\n");
288 if (info->value_size) {
289 printf("value:%c", break_names ? '\n' : ' ');
290 fprint_hex(stdout, value, info->value_size, " ");
295 unsigned int i, n, step;
297 n = get_possible_cpus();
298 step = round_up(info->value_size, 8);
300 if (info->key_size) {
302 fprint_hex(stdout, key, info->key_size, " ");
305 if (info->value_size) {
306 for (i = 0; i < n; i++) {
307 printf("value (CPU %02d):%c",
308 i, info->value_size > 16 ? '\n' : ' ');
309 fprint_hex(stdout, value + i * step,
310 info->value_size, " ");
317 static char **parse_bytes(char **argv, const char *name, unsigned char *val,
320 unsigned int i = 0, base = 0;
323 if (is_prefix(*argv, "hex")) {
328 while (i < n && argv[i]) {
329 val[i] = strtoul(argv[i], &endptr, base);
331 p_err("error parsing byte: %s", argv[i]);
338 p_err("%s expected %d bytes got %d", name, n, i);
345 /* on per cpu maps we must copy the provided value on all value instances */
346 static void fill_per_cpu_value(struct bpf_map_info *info, void *value)
348 unsigned int i, n, step;
350 if (!map_is_per_cpu(info->type))
353 n = get_possible_cpus();
354 step = round_up(info->value_size, 8);
355 for (i = 1; i < n; i++)
356 memcpy(value + i * step, value, info->value_size);
359 static int parse_elem(char **argv, struct bpf_map_info *info,
360 void *key, void *value, __u32 key_size, __u32 value_size,
361 __u32 *flags, __u32 **value_fd)
366 p_err("did not find %s", key ? "key" : "value");
370 if (is_prefix(*argv, "key")) {
373 p_err("duplicate key");
375 p_err("unnecessary key");
379 argv = parse_bytes(argv + 1, "key", key, key_size);
383 return parse_elem(argv, info, NULL, value, key_size, value_size,
385 } else if (is_prefix(*argv, "value")) {
390 p_err("duplicate value");
392 p_err("unnecessary value");
398 if (map_is_map_of_maps(info->type)) {
401 if (value_size != 4) {
402 p_err("value smaller than 4B for map in map?");
405 if (!argv[0] || !argv[1]) {
406 p_err("not enough value arguments for map in map");
410 fd = map_parse_fd(&argc, &argv);
416 } else if (map_is_map_of_progs(info->type)) {
419 if (value_size != 4) {
420 p_err("value smaller than 4B for map of progs?");
423 if (!argv[0] || !argv[1]) {
424 p_err("not enough value arguments for map of progs");
427 if (is_prefix(*argv, "id"))
428 p_info("Warning: updating program array via MAP_ID, make sure this map is kept open\n"
429 " by some process or pinned otherwise update will be lost");
431 fd = prog_parse_fd(&argc, &argv);
438 argv = parse_bytes(argv, "value", value, value_size);
442 fill_per_cpu_value(info, value);
445 return parse_elem(argv, info, key, NULL, key_size, value_size,
447 } else if (is_prefix(*argv, "any") || is_prefix(*argv, "noexist") ||
448 is_prefix(*argv, "exist")) {
450 p_err("flags specified multiple times: %s", *argv);
454 if (is_prefix(*argv, "any"))
456 else if (is_prefix(*argv, "noexist"))
457 *flags = BPF_NOEXIST;
458 else if (is_prefix(*argv, "exist"))
461 return parse_elem(argv + 1, info, key, value, key_size,
462 value_size, NULL, value_fd);
465 p_err("expected key or value, got: %s", *argv);
469 static void show_map_header_json(struct bpf_map_info *info, json_writer_t *wtr)
471 jsonw_uint_field(wtr, "id", info->id);
472 if (info->type < ARRAY_SIZE(map_type_name))
473 jsonw_string_field(wtr, "type", map_type_name[info->type]);
475 jsonw_uint_field(wtr, "type", info->type);
478 jsonw_string_field(wtr, "name", info->name);
480 jsonw_name(wtr, "flags");
481 jsonw_printf(wtr, "%d", info->map_flags);
484 static int show_map_close_json(int fd, struct bpf_map_info *info)
486 char *memlock, *frozen_str;
489 memlock = get_fdinfo(fd, "memlock");
490 frozen_str = get_fdinfo(fd, "frozen");
492 jsonw_start_object(json_wtr);
494 show_map_header_json(info, json_wtr);
496 print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);
498 jsonw_uint_field(json_wtr, "bytes_key", info->key_size);
499 jsonw_uint_field(json_wtr, "bytes_value", info->value_size);
500 jsonw_uint_field(json_wtr, "max_entries", info->max_entries);
503 jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
506 if (info->type == BPF_MAP_TYPE_PROG_ARRAY) {
507 char *owner_prog_type = get_fdinfo(fd, "owner_prog_type");
508 char *owner_jited = get_fdinfo(fd, "owner_jited");
510 if (owner_prog_type) {
511 unsigned int prog_type = atoi(owner_prog_type);
513 if (prog_type < prog_type_name_size)
514 jsonw_string_field(json_wtr, "owner_prog_type",
515 prog_type_name[prog_type]);
517 jsonw_uint_field(json_wtr, "owner_prog_type",
521 jsonw_bool_field(json_wtr, "owner_jited",
522 !!atoi(owner_jited));
524 free(owner_prog_type);
530 frozen = atoi(frozen_str);
533 jsonw_int_field(json_wtr, "frozen", frozen);
536 jsonw_int_field(json_wtr, "btf_id", info->btf_id);
538 if (!hash_empty(map_table.table)) {
539 struct pinned_obj *obj;
541 jsonw_name(json_wtr, "pinned");
542 jsonw_start_array(json_wtr);
543 hash_for_each_possible(map_table.table, obj, hash, info->id) {
544 if (obj->id == info->id)
545 jsonw_string(json_wtr, obj->path);
547 jsonw_end_array(json_wtr);
550 emit_obj_refs_json(&refs_table, info->id, json_wtr);
552 jsonw_end_object(json_wtr);
557 static void show_map_header_plain(struct bpf_map_info *info)
559 printf("%u: ", info->id);
560 if (info->type < ARRAY_SIZE(map_type_name))
561 printf("%s ", map_type_name[info->type]);
563 printf("type %u ", info->type);
566 printf("name %s ", info->name);
568 printf("flags 0x%x", info->map_flags);
569 print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
573 static int show_map_close_plain(int fd, struct bpf_map_info *info)
575 char *memlock, *frozen_str;
578 memlock = get_fdinfo(fd, "memlock");
579 frozen_str = get_fdinfo(fd, "frozen");
581 show_map_header_plain(info);
582 printf("\tkey %uB value %uB max_entries %u",
583 info->key_size, info->value_size, info->max_entries);
586 printf(" memlock %sB", memlock);
589 if (info->type == BPF_MAP_TYPE_PROG_ARRAY) {
590 char *owner_prog_type = get_fdinfo(fd, "owner_prog_type");
591 char *owner_jited = get_fdinfo(fd, "owner_jited");
593 if (owner_prog_type || owner_jited)
595 if (owner_prog_type) {
596 unsigned int prog_type = atoi(owner_prog_type);
598 if (prog_type < prog_type_name_size)
599 printf("owner_prog_type %s ",
600 prog_type_name[prog_type]);
602 printf("owner_prog_type %d ", prog_type);
605 printf("owner%s jited",
606 atoi(owner_jited) ? "" : " not");
608 free(owner_prog_type);
613 if (!hash_empty(map_table.table)) {
614 struct pinned_obj *obj;
616 hash_for_each_possible(map_table.table, obj, hash, info->id) {
617 if (obj->id == info->id)
618 printf("\n\tpinned %s", obj->path);
624 frozen = atoi(frozen_str);
628 if (!info->btf_id && !frozen)
634 printf("btf_id %d", info->btf_id);
637 printf("%sfrozen", info->btf_id ? " " : "");
639 emit_obj_refs_plain(&refs_table, info->id, "\n\tpids ");
645 static int do_show_subset(int argc, char **argv)
647 struct bpf_map_info info = {};
648 __u32 len = sizeof(info);
653 fds = malloc(sizeof(int));
655 p_err("mem alloc failed");
658 nb_fds = map_parse_fds(&argc, &argv, &fds);
662 if (json_output && nb_fds > 1)
663 jsonw_start_array(json_wtr); /* root array */
664 for (i = 0; i < nb_fds; i++) {
665 err = bpf_obj_get_info_by_fd(fds[i], &info, &len);
667 p_err("can't get map info: %s",
669 for (; i < nb_fds; i++)
675 show_map_close_json(fds[i], &info);
677 show_map_close_plain(fds[i], &info);
681 if (json_output && nb_fds > 1)
682 jsonw_end_array(json_wtr); /* root array */
689 static int do_show(int argc, char **argv)
691 struct bpf_map_info info = {};
692 __u32 len = sizeof(info);
698 build_pinned_obj_table(&map_table, BPF_OBJ_MAP);
699 build_obj_refs_table(&refs_table, BPF_OBJ_MAP);
702 return do_show_subset(argc, argv);
708 jsonw_start_array(json_wtr);
710 err = bpf_map_get_next_id(id, &id);
714 p_err("can't get next map: %s%s", strerror(errno),
715 errno == EINVAL ? " -- kernel too old?" : "");
719 fd = bpf_map_get_fd_by_id(id);
723 p_err("can't get map by id (%u): %s",
724 id, strerror(errno));
728 err = bpf_obj_get_info_by_fd(fd, &info, &len);
730 p_err("can't get map info: %s", strerror(errno));
736 show_map_close_json(fd, &info);
738 show_map_close_plain(fd, &info);
741 jsonw_end_array(json_wtr);
743 delete_obj_refs_table(&refs_table);
745 return errno == ENOENT ? 0 : -1;
748 static int dump_map_elem(int fd, void *key, void *value,
749 struct bpf_map_info *map_info, struct btf *btf,
750 json_writer_t *btf_wtr)
752 if (bpf_map_lookup_elem(fd, key, value)) {
753 print_entry_error(map_info, key, errno);
758 print_entry_json(map_info, key, value, btf);
760 struct btf_dumper d = {
763 .is_plain_text = true,
766 do_dump_btf(&d, map_info, key, value);
768 print_entry_plain(map_info, key, value);
774 static int maps_have_btf(int *fds, int nb_fds)
776 struct bpf_map_info info = {};
777 __u32 len = sizeof(info);
780 for (i = 0; i < nb_fds; i++) {
781 err = bpf_obj_get_info_by_fd(fds[i], &info, &len);
783 p_err("can't get map info: %s", strerror(errno));
794 static struct btf *btf_vmlinux;
796 static struct btf *get_map_kv_btf(const struct bpf_map_info *info)
798 struct btf *btf = NULL;
800 if (info->btf_vmlinux_value_type_id) {
802 btf_vmlinux = libbpf_find_kernel_btf();
803 if (IS_ERR(btf_vmlinux))
804 p_err("failed to get kernel btf");
807 } else if (info->btf_value_type_id) {
810 err = btf__get_from_id(info->btf_id, &btf);
812 p_err("failed to get btf");
813 btf = err ? ERR_PTR(err) : ERR_PTR(-ESRCH);
820 static void free_map_kv_btf(struct btf *btf)
822 if (!IS_ERR(btf) && btf != btf_vmlinux)
826 static void free_btf_vmlinux(void)
828 if (!IS_ERR(btf_vmlinux))
829 btf__free(btf_vmlinux);
833 map_dump(int fd, struct bpf_map_info *info, json_writer_t *wtr,
836 void *key, *value, *prev_key;
837 unsigned int num_elems = 0;
838 struct btf *btf = NULL;
841 key = malloc(info->key_size);
842 value = alloc_value(info);
843 if (!key || !value) {
844 p_err("mem alloc failed");
852 btf = get_map_kv_btf(info);
859 jsonw_start_object(wtr); /* map object */
860 show_map_header_json(info, wtr);
861 jsonw_name(wtr, "elements");
863 jsonw_start_array(wtr); /* elements */
864 } else if (show_header) {
865 show_map_header_plain(info);
868 if (info->type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY &&
869 info->value_size != 8)
870 p_info("Warning: cannot read values from %s map with value_size != 8",
871 map_type_name[info->type]);
873 err = bpf_map_get_next_key(fd, prev_key, key);
879 if (!dump_map_elem(fd, key, value, info, btf, wtr))
885 jsonw_end_array(wtr); /* elements */
887 jsonw_end_object(wtr); /* map object */
889 printf("Found %u element%s\n", num_elems,
890 num_elems != 1 ? "s" : "");
897 free_map_kv_btf(btf);
902 static int do_dump(int argc, char **argv)
904 json_writer_t *wtr = NULL, *btf_wtr = NULL;
905 struct bpf_map_info info = {};
907 __u32 len = sizeof(info);
914 fds = malloc(sizeof(int));
916 p_err("mem alloc failed");
919 nb_fds = map_parse_fds(&argc, &argv, &fds);
928 do_plain_btf = maps_have_btf(fds, nb_fds);
929 if (do_plain_btf < 0)
933 btf_wtr = get_btf_writer();
936 p_info("failed to create json writer for btf. falling back to plain output");
940 if (wtr && nb_fds > 1)
941 jsonw_start_array(wtr); /* root array */
942 for (i = 0; i < nb_fds; i++) {
943 if (bpf_obj_get_info_by_fd(fds[i], &info, &len)) {
944 p_err("can't get map info: %s", strerror(errno));
947 err = map_dump(fds[i], &info, wtr, nb_fds > 1);
948 if (!wtr && i != nb_fds - 1)
955 if (wtr && nb_fds > 1)
956 jsonw_end_array(wtr); /* root array */
959 jsonw_destroy(&btf_wtr);
961 for (; i < nb_fds; i++)
969 static int alloc_key_value(struct bpf_map_info *info, void **key, void **value)
974 if (info->key_size) {
975 *key = malloc(info->key_size);
977 p_err("key mem alloc failed");
982 if (info->value_size) {
983 *value = alloc_value(info);
985 p_err("value mem alloc failed");
995 static int do_update(int argc, char **argv)
997 struct bpf_map_info info = {};
998 __u32 len = sizeof(info);
999 __u32 *value_fd = NULL;
1000 __u32 flags = BPF_ANY;
1007 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1011 err = alloc_key_value(&info, &key, &value);
1015 err = parse_elem(argv, &info, key, value, info.key_size,
1016 info.value_size, &flags, &value_fd);
1020 err = bpf_map_update_elem(fd, key, value, flags);
1022 p_err("update failed: %s", strerror(errno));
1033 if (!err && json_output)
1034 jsonw_null(json_wtr);
1038 static void print_key_value(struct bpf_map_info *info, void *key,
1041 json_writer_t *btf_wtr;
1042 struct btf *btf = NULL;
1045 err = btf__get_from_id(info->btf_id, &btf);
1047 p_err("failed to get btf");
1052 print_entry_json(info, key, value, btf);
1054 /* if here json_wtr wouldn't have been initialised,
1055 * so let's create separate writer for btf
1057 btf_wtr = get_btf_writer();
1059 p_info("failed to create json writer for btf. falling back to plain output");
1062 print_entry_plain(info, key, value);
1064 struct btf_dumper d = {
1067 .is_plain_text = true,
1070 do_dump_btf(&d, info, key, value);
1071 jsonw_destroy(&btf_wtr);
1074 print_entry_plain(info, key, value);
1079 static int do_lookup(int argc, char **argv)
1081 struct bpf_map_info info = {};
1082 __u32 len = sizeof(info);
1090 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1094 err = alloc_key_value(&info, &key, &value);
1098 err = parse_elem(argv, &info, key, NULL, info.key_size, 0, NULL, NULL);
1102 err = bpf_map_lookup_elem(fd, key, value);
1104 if (errno == ENOENT) {
1106 jsonw_null(json_wtr);
1109 fprint_hex(stdout, key, info.key_size, " ");
1110 printf("\n\nNot found\n");
1113 p_err("lookup failed: %s", strerror(errno));
1119 /* here means bpf_map_lookup_elem() succeeded */
1120 print_key_value(&info, key, value);
1130 static int do_getnext(int argc, char **argv)
1132 struct bpf_map_info info = {};
1133 __u32 len = sizeof(info);
1134 void *key, *nextkey;
1141 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1145 key = malloc(info.key_size);
1146 nextkey = malloc(info.key_size);
1147 if (!key || !nextkey) {
1148 p_err("mem alloc failed");
1154 err = parse_elem(argv, &info, key, NULL, info.key_size, 0,
1163 err = bpf_map_get_next_key(fd, key, nextkey);
1165 p_err("can't get next key: %s", strerror(errno));
1170 jsonw_start_object(json_wtr);
1172 jsonw_name(json_wtr, "key");
1173 print_hex_data_json(key, info.key_size);
1175 jsonw_null_field(json_wtr, "key");
1177 jsonw_name(json_wtr, "next_key");
1178 print_hex_data_json(nextkey, info.key_size);
1179 jsonw_end_object(json_wtr);
1183 fprint_hex(stdout, key, info.key_size, " ");
1186 printf("key: None\n");
1188 printf("next key:\n");
1189 fprint_hex(stdout, nextkey, info.key_size, " ");
1201 static int do_delete(int argc, char **argv)
1203 struct bpf_map_info info = {};
1204 __u32 len = sizeof(info);
1212 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1216 key = malloc(info.key_size);
1218 p_err("mem alloc failed");
1223 err = parse_elem(argv, &info, key, NULL, info.key_size, 0, NULL, NULL);
1227 err = bpf_map_delete_elem(fd, key);
1229 p_err("delete failed: %s", strerror(errno));
1235 if (!err && json_output)
1236 jsonw_null(json_wtr);
1240 static int do_pin(int argc, char **argv)
1244 err = do_pin_any(argc, argv, map_parse_fd);
1245 if (!err && json_output)
1246 jsonw_null(json_wtr);
1250 static int do_create(int argc, char **argv)
1252 struct bpf_create_map_attr attr = { NULL, };
1253 const char *pinfile;
1258 pinfile = GET_ARG();
1264 if (is_prefix(*argv, "type")) {
1267 if (attr.map_type) {
1268 p_err("map type already specified");
1272 attr.map_type = map_type_from_str(*argv);
1273 if ((int)attr.map_type < 0) {
1274 p_err("unrecognized map type: %s", *argv);
1278 } else if (is_prefix(*argv, "name")) {
1280 attr.name = GET_ARG();
1281 } else if (is_prefix(*argv, "key")) {
1282 if (parse_u32_arg(&argc, &argv, &attr.key_size,
1285 } else if (is_prefix(*argv, "value")) {
1286 if (parse_u32_arg(&argc, &argv, &attr.value_size,
1289 } else if (is_prefix(*argv, "entries")) {
1290 if (parse_u32_arg(&argc, &argv, &attr.max_entries,
1293 } else if (is_prefix(*argv, "flags")) {
1294 if (parse_u32_arg(&argc, &argv, &attr.map_flags,
1297 } else if (is_prefix(*argv, "dev")) {
1300 if (attr.map_ifindex) {
1301 p_err("offload device already specified");
1305 attr.map_ifindex = if_nametoindex(*argv);
1306 if (!attr.map_ifindex) {
1307 p_err("unrecognized netdevice '%s': %s",
1308 *argv, strerror(errno));
1312 } else if (is_prefix(*argv, "inner_map")) {
1313 struct bpf_map_info info = {};
1314 __u32 len = sizeof(info);
1320 inner_map_fd = map_parse_fd_and_info(&argc, &argv,
1322 if (inner_map_fd < 0)
1324 attr.inner_map_fd = inner_map_fd;
1326 p_err("unknown arg %s", *argv);
1332 p_err("map name not specified");
1338 fd = bpf_create_map_xattr(&attr);
1340 p_err("map create failed: %s", strerror(errno));
1344 err = do_pin_fd(fd, pinfile);
1350 jsonw_null(json_wtr);
1353 if (attr.inner_map_fd > 0)
1354 close(attr.inner_map_fd);
1359 static int do_pop_dequeue(int argc, char **argv)
1361 struct bpf_map_info info = {};
1362 __u32 len = sizeof(info);
1370 fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
1374 err = alloc_key_value(&info, &key, &value);
1378 err = bpf_map_lookup_and_delete_elem(fd, key, value);
1380 if (errno == ENOENT) {
1382 jsonw_null(json_wtr);
1384 printf("Error: empty map\n");
1386 p_err("pop failed: %s", strerror(errno));
1392 print_key_value(&info, key, value);
1402 static int do_freeze(int argc, char **argv)
1409 fd = map_parse_fd(&argc, &argv);
1418 err = bpf_map_freeze(fd);
1421 p_err("failed to freeze map: %s", strerror(errno));
1426 jsonw_null(json_wtr);
1431 static int do_help(int argc, char **argv)
1434 jsonw_null(json_wtr);
1439 "Usage: %1$s %2$s { show | list } [MAP]\n"
1440 " %1$s %2$s create FILE type TYPE key KEY_SIZE value VALUE_SIZE \\\n"
1441 " entries MAX_ENTRIES name NAME [flags FLAGS] \\\n"
1442 " [inner_map MAP] [dev NAME]\n"
1443 " %1$s %2$s dump MAP\n"
1444 " %1$s %2$s update MAP [key DATA] [value VALUE] [UPDATE_FLAGS]\n"
1445 " %1$s %2$s lookup MAP [key DATA]\n"
1446 " %1$s %2$s getnext MAP [key DATA]\n"
1447 " %1$s %2$s delete MAP key DATA\n"
1448 " %1$s %2$s pin MAP FILE\n"
1449 " %1$s %2$s event_pipe MAP [cpu N index M]\n"
1450 " %1$s %2$s peek MAP\n"
1451 " %1$s %2$s push MAP value VALUE\n"
1452 " %1$s %2$s pop MAP\n"
1453 " %1$s %2$s enqueue MAP value VALUE\n"
1454 " %1$s %2$s dequeue MAP\n"
1455 " %1$s %2$s freeze MAP\n"
1458 " " HELP_SPEC_MAP "\n"
1459 " DATA := { [hex] BYTES }\n"
1460 " " HELP_SPEC_PROGRAM "\n"
1461 " VALUE := { DATA | MAP | PROG }\n"
1462 " UPDATE_FLAGS := { any | exist | noexist }\n"
1463 " TYPE := { hash | array | prog_array | perf_event_array | percpu_hash |\n"
1464 " percpu_array | stack_trace | cgroup_array | lru_hash |\n"
1465 " lru_percpu_hash | lpm_trie | array_of_maps | hash_of_maps |\n"
1466 " devmap | devmap_hash | sockmap | cpumap | xskmap | sockhash |\n"
1467 " cgroup_storage | reuseport_sockarray | percpu_cgroup_storage |\n"
1468 " queue | stack | sk_storage | struct_ops | ringbuf | inode_storage |\n"
1470 " " HELP_SPEC_OPTIONS "\n"
1472 bin_name, argv[-2]);
1477 static const struct cmd cmds[] = {
1478 { "show", do_show },
1479 { "list", do_show },
1480 { "help", do_help },
1481 { "dump", do_dump },
1482 { "update", do_update },
1483 { "lookup", do_lookup },
1484 { "getnext", do_getnext },
1485 { "delete", do_delete },
1487 { "event_pipe", do_event_pipe },
1488 { "create", do_create },
1489 { "peek", do_lookup },
1490 { "push", do_update },
1491 { "enqueue", do_update },
1492 { "pop", do_pop_dequeue },
1493 { "dequeue", do_pop_dequeue },
1494 { "freeze", do_freeze },
1498 int do_map(int argc, char **argv)
1500 return cmd_select(cmds, argc, argv, do_help);