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| author |   Daniel Borkmann <daniel@iogearbox.net> | 2019-11-22 21:07:56 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2019-11-24 17:04:11 -0800 |
| commit | 2beee5f57441413b64a9c2bd657e17beabb98d1c (patch) | |
| tree | 8ad85ac286a4c8a435ac2b83204f610b4e8e2cfa /kernel/bpf/arraymap.c | |
| parent | bpf: Move bpf_free_used_maps into sleepable section (diff) | |
| download | linux-dev-2beee5f57441413b64a9c2bd657e17beabb98d1c.tar.xz linux-dev-2beee5f57441413b64a9c2bd657e17beabb98d1c.zip | |
bpf: Move owner type, jited info into array auxiliary data
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
Diffstat (limited to 'kernel/bpf/arraymap.c')
| -rw-r--r-- | kernel/bpf/arraymap.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c index 633c8c701ff6..57da950ee55b 100644 --- a/kernel/bpf/arraymap.c +++ b/kernel/bpf/arraymap.c @@ -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, |