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authorDaniel Borkmann <daniel@iogearbox.net>2016-06-30 18:24:44 +0300
committerDavid S. Miller <davem@davemloft.net>2016-07-01 23:00:47 +0300
commit113214be7f6c98dd6d0435e4765aea8dea91662c (patch)
tree31d2c41c7af6991401c3aff11e7ade3317b4a614 /include/linux/bpf.h
parent1aacde3d22c42281236155c1ef6d7a5aa32a826b (diff)
downloadlinux-113214be7f6c98dd6d0435e4765aea8dea91662c.tar.xz
bpf: refactor bpf_prog_get and type check into helper
Since bpf_prog_get() and program type check is used in a couple of places, refactor this into a small helper function that we can make use of. Since the non RO prog->aux part is not used in performance critical paths and a program destruction via RCU is rather very unlikley when doing the put, we shouldn't have an issue just doing the bpf_prog_get() + prog->type != type check, but actually not taking the ref at all (due to being in fdget() / fdput() section of the bpf fd) is even cleaner and makes the diff smaller as well, so just go for that. Callsites are changed to make use of the new helper where possible. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/bpf.h')
-rw-r--r--include/linux/bpf.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 749549888b86..b3336b4f5d04 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -218,6 +218,7 @@ void bpf_register_prog_type(struct bpf_prog_type_list *tl);
void bpf_register_map_type(struct bpf_map_type_list *tl);
struct bpf_prog *bpf_prog_get(u32 ufd);
+struct bpf_prog *bpf_prog_get_type(u32 ufd, enum bpf_prog_type type);
struct bpf_prog *bpf_prog_inc(struct bpf_prog *prog);
void bpf_prog_put(struct bpf_prog *prog);
@@ -277,6 +278,12 @@ static inline struct bpf_prog *bpf_prog_get(u32 ufd)
return ERR_PTR(-EOPNOTSUPP);
}
+static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
+ enum bpf_prog_type type)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
static inline void bpf_prog_put(struct bpf_prog *prog)
{
}