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bpf: Move owner type, jited info into array auxiliary data

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We're going to extend this with further information which is only
relevant for prog array at this point. Given this info is not used
in critical path, move it into its own structure such that the main
array map structure can be kept on diet.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/b9ddccdb0f6f7026489ee955f16c96381e1e7238.1574452833.git.daniel@iogearbox.net
This commit is contained in:
Daniel Borkmann 2019-11-22 21:07:56 +01:00 • committed by Alexei Starovoitov
parent 6332be04c0
commit 2beee5f574
5 changed files with 54 additions and 28 deletions
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32
kernel/bpf/arraymap.c
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@ -671,10 +671,38 @@ static void prog_array_map_seq_show_elem(struct bpf_map *map, void *key,
rcu_read_unlock();
}
static struct bpf_map *prog_array_map_alloc(union bpf_attr *attr)
{
struct bpf_array_aux *aux;
struct bpf_map *map;
aux = kzalloc(sizeof(*aux), GFP_KERNEL);
if (!aux)
return ERR_PTR(-ENOMEM);
map = array_map_alloc(attr);
if (IS_ERR(map)) {
kfree(aux);
return map;
}
container_of(map, struct bpf_array, map)->aux = aux;
return map;
}
static void prog_array_map_free(struct bpf_map *map)
{
struct bpf_array_aux *aux;
aux = container_of(map, struct bpf_array, map)->aux;
kfree(aux);
fd_array_map_free(map);
}
const struct bpf_map_ops prog_array_map_ops = {
.map_alloc_check = fd_array_map_alloc_check,
.map_alloc = array_map_alloc,
.map_free = fd_array_map_free,
.map_alloc = prog_array_map_alloc,
.map_free = prog_array_map_free,
.map_get_next_key = array_map_get_next_key,
.map_lookup_elem = fd_array_map_lookup_elem,
.map_delete_elem = fd_array_map_delete_elem,