diff options
| -rw-r--r-- | kernel/bpf/hashtab.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c index 513d9dfcf4ee..d6110042e0d9 100644 --- a/kernel/bpf/hashtab.c +++ b/kernel/bpf/hashtab.c @@ -11,9 +11,11 @@ * General Public License for more details. */ #include <linux/bpf.h> +#include <linux/btf.h> #include <linux/jhash.h> #include <linux/filter.h> #include <linux/rculist_nulls.h> +#include <uapi/linux/btf.h> #include "percpu_freelist.h" #include "bpf_lru_list.h" #include "map_in_map.h" @@ -1162,6 +1164,44 @@ static void htab_map_free(struct bpf_map *map) kfree(htab); } +static void htab_map_seq_show_elem(struct bpf_map *map, void *key, + struct seq_file *m) +{ + void *value; + + rcu_read_lock(); + + value = htab_map_lookup_elem(map, key); + if (!value) { + rcu_read_unlock(); + return; + } + + btf_type_seq_show(map->btf, map->btf_key_type_id, key, m); + seq_puts(m, ": "); + btf_type_seq_show(map->btf, map->btf_value_type_id, value, m); + seq_puts(m, "\n"); + + rcu_read_unlock(); +} + +static int htab_map_check_btf(const struct bpf_map *map, const struct btf *btf, + u32 btf_key_id, u32 btf_value_id) +{ + const struct btf_type *key_type, *value_type; + u32 key_size, value_size; + + key_type = btf_type_id_size(btf, &btf_key_id, &key_size); + if (!key_type || key_size != map->key_size) + return -EINVAL; + + value_type = btf_type_id_size(btf, &btf_value_id, &value_size); + if (!value_type || value_size != map->value_size) + return -EINVAL; + + return 0; +} + const struct bpf_map_ops htab_map_ops = { .map_alloc_check = htab_map_alloc_check, .map_alloc = htab_map_alloc, @@ -1171,6 +1211,8 @@ const struct bpf_map_ops htab_map_ops = { .map_update_elem = htab_map_update_elem, .map_delete_elem = htab_map_delete_elem, .map_gen_lookup = htab_map_gen_lookup, + .map_seq_show_elem = htab_map_seq_show_elem, + .map_check_btf = htab_map_check_btf, }; const struct bpf_map_ops htab_lru_map_ops = { @@ -1182,6 +1224,8 @@ const struct bpf_map_ops htab_lru_map_ops = { .map_update_elem = htab_lru_map_update_elem, .map_delete_elem = htab_lru_map_delete_elem, .map_gen_lookup = htab_lru_map_gen_lookup, + .map_seq_show_elem = htab_map_seq_show_elem, + .map_check_btf = htab_map_check_btf, }; /* Called from eBPF program */ |