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bpf: btf: Rename btf_key_id and btf_value_id in bpf_map_info 

In "struct bpf_map_info", the name "btf_id", "btf_key_id" and "btf_value_id"
could cause confusion because the "id" of "btf_id" means the BPF obj id
given to the BTF object while
"btf_key_id" and "btf_value_id" means the BTF type id within
that BTF object.

To make it clear, btf_key_id and btf_value_id are
renamed to btf_key_type_id and btf_value_type_id.

Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Martin KaFai Lau 2018-05-22 14:57:21 -07:00 committed by Daniel Borkmann
parent aea2f7b891
commit 9b2cf328b2
4 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/bpf.h
View File

@ -69,8 +69,8 @@ struct bpf_map {
u32 pages;
u32 id;
int numa_node;
u32 btf_key_id;
u32 btf_value_id;
u32 btf_key_type_id;
u32 btf_value_type_id;
struct btf *btf;
bool unpriv_array;
/* 55 bytes hole */

8
include/uapi/linux/bpf.h
View File

@ -284,8 +284,8 @@ union bpf_attr {
char map_name[BPF_OBJ_NAME_LEN];
__u32 map_ifindex; /* ifindex of netdev to create on */
__u32 btf_fd; /* fd pointing to a BTF type data */
__u32 btf_key_id; /* BTF type_id of the key */
__u32 btf_value_id; /* BTF type_id of the value */
__u32 btf_key_type_id; /* BTF type_id of the key */
__u32 btf_value_type_id; /* BTF type_id of the value */
};
struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
@ -2219,8 +2219,8 @@ struct bpf_map_info {
__u64 netns_dev;
__u64 netns_ino;
__u32 btf_id;
__u32 btf_key_id;
__u32 btf_value_id;
__u32 btf_key_type_id;
__u32 btf_value_type_id;
} __attribute__((aligned(8)));
struct bpf_btf_info {

2
kernel/bpf/arraymap.c
View File

@ -352,7 +352,7 @@ static void array_map_seq_show_elem(struct bpf_map *map, void *key,
}
seq_printf(m, "%u: ", *(u32 *)key);
btf_type_seq_show(map->btf, map->btf_value_id, value, m);
btf_type_seq_show(map->btf, map->btf_value_type_id, value, m);
seq_puts(m, "\n");
rcu_read_unlock();

18
kernel/bpf/syscall.c
View File

@ -422,7 +422,7 @@ static int bpf_obj_name_cpy(char *dst, const char *src)
return 0;
}
#define BPF_MAP_CREATE_LAST_FIELD btf_value_id
#define BPF_MAP_CREATE_LAST_FIELD btf_value_type_id
/* called via syscall */
static int map_create(union bpf_attr *attr)
{
@ -457,10 +457,10 @@ static int map_create(union bpf_attr *attr)
atomic_set(&map->usercnt, 1);
if (bpf_map_support_seq_show(map) &&
(attr->btf_key_id || attr->btf_value_id)) {
(attr->btf_key_type_id || attr->btf_value_type_id)) {
struct btf *btf;
if (!attr->btf_key_id || !attr->btf_value_id) {
if (!attr->btf_key_type_id || !attr->btf_value_type_id) {
err = -EINVAL;
goto free_map_nouncharge;
}
@ -471,16 +471,16 @@ static int map_create(union bpf_attr *attr)
goto free_map_nouncharge;
}
err = map->ops->map_check_btf(map, btf, attr->btf_key_id,
attr->btf_value_id);
err = map->ops->map_check_btf(map, btf, attr->btf_key_type_id,
attr->btf_value_type_id);
if (err) {
btf_put(btf);
goto free_map_nouncharge;
}
map->btf = btf;
map->btf_key_id = attr->btf_key_id;
map->btf_value_id = attr->btf_value_id;
map->btf_key_type_id = attr->btf_key_type_id;
map->btf_value_type_id = attr->btf_value_type_id;
}
err = security_bpf_map_alloc(map);
@ -2013,8 +2013,8 @@ static int bpf_map_get_info_by_fd(struct bpf_map *map,
if (map->btf) {
info.btf_id = btf_id(map->btf);
info.btf_key_id = map->btf_key_id;
info.btf_value_id = map->btf_value_id;
info.btf_key_type_id = map->btf_key_type_id;
info.btf_value_type_id = map->btf_value_type_id;
}
if (bpf_map_is_dev_bound(map)) {