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Diffstat (limited to 'tools/bpf/bpftool/map.c')
-rw-r--r--tools/bpf/bpftool/map.c170
1 files changed, 11 insertions, 159 deletions
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index c5fac8068ba1..3a27d31a1856 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -49,6 +49,7 @@ const char * const map_type_name[] = {
[BPF_MAP_TYPE_STACK] = "stack",
[BPF_MAP_TYPE_SK_STORAGE] = "sk_storage",
[BPF_MAP_TYPE_STRUCT_OPS] = "struct_ops",
+ [BPF_MAP_TYPE_RINGBUF] = "ringbuf",
};
const size_t map_type_name_size = ARRAY_SIZE(map_type_name);
@@ -92,162 +93,6 @@ static void *alloc_value(struct bpf_map_info *info)
return malloc(info->value_size);
}
-static int map_fd_by_name(char *name, int **fds)
-{
- unsigned int id = 0;
- int fd, nb_fds = 0;
- void *tmp;
- int err;
-
- while (true) {
- struct bpf_map_info info = {};
- __u32 len = sizeof(info);
-
- err = bpf_map_get_next_id(id, &id);
- if (err) {
- if (errno != ENOENT) {
- p_err("%s", strerror(errno));
- goto err_close_fds;
- }
- return nb_fds;
- }
-
- fd = bpf_map_get_fd_by_id(id);
- if (fd < 0) {
- p_err("can't get map by id (%u): %s",
- id, strerror(errno));
- goto err_close_fds;
- }
-
- err = bpf_obj_get_info_by_fd(fd, &info, &len);
- if (err) {
- p_err("can't get map info (%u): %s",
- id, strerror(errno));
- goto err_close_fd;
- }
-
- if (strncmp(name, info.name, BPF_OBJ_NAME_LEN)) {
- close(fd);
- continue;
- }
-
- if (nb_fds > 0) {
- tmp = realloc(*fds, (nb_fds + 1) * sizeof(int));
- if (!tmp) {
- p_err("failed to realloc");
- goto err_close_fd;
- }
- *fds = tmp;
- }
- (*fds)[nb_fds++] = fd;
- }
-
-err_close_fd:
- close(fd);
-err_close_fds:
- while (--nb_fds >= 0)
- close((*fds)[nb_fds]);
- return -1;
-}
-
-static int map_parse_fds(int *argc, char ***argv, int **fds)
-{
- if (is_prefix(**argv, "id")) {
- unsigned int id;
- char *endptr;
-
- NEXT_ARGP();
-
- id = strtoul(**argv, &endptr, 0);
- if (*endptr) {
- p_err("can't parse %s as ID", **argv);
- return -1;
- }
- NEXT_ARGP();
-
- (*fds)[0] = bpf_map_get_fd_by_id(id);
- if ((*fds)[0] < 0) {
- p_err("get map by id (%u): %s", id, strerror(errno));
- return -1;
- }
- return 1;
- } else if (is_prefix(**argv, "name")) {
- char *name;
-
- NEXT_ARGP();
-
- name = **argv;
- if (strlen(name) > BPF_OBJ_NAME_LEN - 1) {
- p_err("can't parse name");
- return -1;
- }
- NEXT_ARGP();
-
- return map_fd_by_name(name, fds);
- } else if (is_prefix(**argv, "pinned")) {
- char *path;
-
- NEXT_ARGP();
-
- path = **argv;
- NEXT_ARGP();
-
- (*fds)[0] = open_obj_pinned_any(path, BPF_OBJ_MAP);
- if ((*fds)[0] < 0)
- return -1;
- return 1;
- }
-
- p_err("expected 'id', 'name' or 'pinned', got: '%s'?", **argv);
- return -1;
-}
-
-int map_parse_fd(int *argc, char ***argv)
-{
- int *fds = NULL;
- int nb_fds, fd;
-
- fds = malloc(sizeof(int));
- if (!fds) {
- p_err("mem alloc failed");
- return -1;
- }
- nb_fds = map_parse_fds(argc, argv, &fds);
- if (nb_fds != 1) {
- if (nb_fds > 1) {
- p_err("several maps match this handle");
- while (nb_fds--)
- close(fds[nb_fds]);
- }
- fd = -1;
- goto exit_free;
- }
-
- fd = fds[0];
-exit_free:
- free(fds);
- return fd;
-}
-
-int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len)
-{
- int err;
- int fd;
-
- fd = map_parse_fd(argc, argv);
- if (fd < 0)
- return -1;
-
- err = bpf_obj_get_info_by_fd(fd, info, info_len);
- if (err) {
- p_err("can't get map info: %s", strerror(errno));
- close(fd);
- return err;
- }
-
- return fd;
-}
-
static int do_dump_btf(const struct btf_dumper *d,
struct bpf_map_info *map_info, void *key,
void *value)
@@ -628,7 +473,7 @@ static int show_map_close_json(int fd, struct bpf_map_info *info)
if (owner_prog_type) {
unsigned int prog_type = atoi(owner_prog_type);
- if (prog_type < ARRAY_SIZE(prog_type_name))
+ if (prog_type < prog_type_name_size)
jsonw_string_field(json_wtr, "owner_prog_type",
prog_type_name[prog_type]);
else
@@ -665,6 +510,8 @@ static int show_map_close_json(int fd, struct bpf_map_info *info)
jsonw_end_array(json_wtr);
}
+ emit_obj_refs_json(&refs_table, info->id, json_wtr);
+
jsonw_end_object(json_wtr);
return 0;
@@ -711,7 +558,7 @@ static int show_map_close_plain(int fd, struct bpf_map_info *info)
if (owner_prog_type) {
unsigned int prog_type = atoi(owner_prog_type);
- if (prog_type < ARRAY_SIZE(prog_type_name))
+ if (prog_type < prog_type_name_size)
printf("owner_prog_type %s ",
prog_type_name[prog_type]);
else
@@ -752,6 +599,8 @@ static int show_map_close_plain(int fd, struct bpf_map_info *info)
if (frozen)
printf("%sfrozen", info->btf_id ? " " : "");
+ emit_obj_refs_plain(&refs_table, info->id, "\n\tpids ");
+
printf("\n");
return 0;
}
@@ -810,6 +659,7 @@ static int do_show(int argc, char **argv)
if (show_pinned)
build_pinned_obj_table(&map_table, BPF_OBJ_MAP);
+ build_obj_refs_table(&refs_table, BPF_OBJ_MAP);
if (argc == 2)
return do_show_subset(argc, argv);
@@ -853,6 +703,8 @@ static int do_show(int argc, char **argv)
if (json_output)
jsonw_end_array(json_wtr);
+ delete_obj_refs_table(&refs_table);
+
return errno == ENOENT ? 0 : -1;
}
@@ -1590,7 +1442,7 @@ static int do_help(int argc, char **argv)
" lru_percpu_hash | lpm_trie | array_of_maps | hash_of_maps |\n"
" devmap | devmap_hash | sockmap | cpumap | xskmap | sockhash |\n"
" cgroup_storage | reuseport_sockarray | percpu_cgroup_storage |\n"
- " queue | stack | sk_storage | struct_ops }\n"
+ " queue | stack | sk_storage | struct_ops | ringbuf }\n"
" " HELP_SPEC_OPTIONS "\n"
"",
bin_name, argv[-2]);
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