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bpf: pass struct btf pointer to the map_check_btf() callback

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If key_type or value_type are of non-trivial data types
(e.g. structure or typedef), it's not possible to check them without
the additional information, which can't be obtained without a pointer
to the btf structure.

So, let's pass btf pointer to the map_check_btf() callbacks.

Signed-off-by: Roman Gushchin <guro@fb.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Roman Gushchin
2018-12-10 15:43:00 -08:00
committed by Alexei Starovoitov
parent a0517a0f7e
commit 1b2b234b13
4 changed files with 7 additions and 1 deletions
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3
kernel/bpf/syscall.c
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@@ -456,6 +456,7 @@ static int bpf_obj_name_cpy(char *dst, const char *src)
}
int map_check_no_btf(const struct bpf_map *map,
const struct btf *btf,
const struct btf_type *key_type,
const struct btf_type *value_type)
{
@@ -478,7 +479,7 @@ static int map_check_btf(const struct bpf_map *map, const struct btf *btf,
return -EINVAL;
if (map->ops->map_check_btf)
ret = map->ops->map_check_btf(map, key_type, value_type);
ret = map->ops->map_check_btf(map, btf, key_type, value_type);
return ret;
}