summaryrefslogtreecommitdiff
path: root/include/net/dst_metadata.h
diff options
context:
space:
mode:
authorJakub Kicinski <jakub.kicinski@netronome.com>2017-10-09 20:30:14 +0300
committerDavid S. Miller <davem@davemloft.net>2017-10-10 22:30:16 +0300
commitd66f2b91f95b56e31772b9faa0d036cd2e53cb02 (patch)
tree7443577f00bc649d464047dba4b3ece5fa0fb7e2 /include/net/dst_metadata.h
parentc9c35995bcf812ee8136f634c25bc6ccc3021d4c (diff)
downloadlinux-d66f2b91f95b56e31772b9faa0d036cd2e53cb02.tar.xz
bpf: don't rely on the verifier lock for metadata_dst allocation
bpf_skb_set_tunnel_*() functions require allocation of per-cpu metadata_dst. The allocation happens upon verification of the first program using those helpers. In preparation for removing the verifier lock, use cmpxchg() to make sure we only allocate the metadata_dsts once. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/dst_metadata.h')
-rw-r--r--include/net/dst_metadata.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/dst_metadata.h b/include/net/dst_metadata.h
index 9fba2ebf6dda..87a0bb8d449f 100644
--- a/include/net/dst_metadata.h
+++ b/include/net/dst_metadata.h
@@ -87,6 +87,7 @@ static inline int skb_metadata_dst_cmp(const struct sk_buff *skb_a,
void metadata_dst_free(struct metadata_dst *);
struct metadata_dst *metadata_dst_alloc(u8 optslen, enum metadata_type type,
gfp_t flags);
+void metadata_dst_free_percpu(struct metadata_dst __percpu *md_dst);
struct metadata_dst __percpu *
metadata_dst_alloc_percpu(u8 optslen, enum metadata_type type, gfp_t flags);