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netfilter: bridge: reduce nf_bridge_info to 32 bytes again

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We can use union for most of the temporary cruft (original ipv4/ipv6
address, source mac, physoutdev) since they're used during different
stages of br netfilter traversal.

Also get rid of the last two ->mask users.

Shrinks struct from 48 to 32 on 64bit arch.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal
2015-07-23 16:21:30 +02:00
committed by Pablo Neira Ayuso
parent d7ee351904
commit 72b1e5e4ca
6 changed files with 33 additions and 28 deletions
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19
include/linux/skbuff.h
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@@ -173,17 +173,24 @@ struct nf_bridge_info {
BRNF_PROTO_8021Q,
BRNF_PROTO_PPPOE
} orig_proto:8;
bool pkt_otherhost;
u8 pkt_otherhost:1;
u8 in_prerouting:1;
u8 bridged_dnat:1;
__u16 frag_max_size;
unsigned int mask;
struct net_device *physindev;
union {
struct net_device *physoutdev;
char neigh_header[8];
};
union {
/* prerouting: detect dnat in orig/reply direction */
__be32 ipv4_daddr;
struct in6_addr ipv6_daddr;
/* after prerouting + nat detected: store original source
* mac since neigh resolution overwrites it, only used while
* skb is out in neigh layer.
*/
char neigh_header[8];
/* always valid & non-NULL from FORWARD on, for physdev match */
struct net_device *physoutdev;
};
};
#endif