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net: Add ->neigh_lookup() operation to dst_ops

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In the future dst entries will be neigh-less.  In that environment we
need to have an easy transition point for current users of
dst->neighbour outside of the packet output fast path.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2011-07-18 00:40:17 -07:00
parent 69cce1d140
commit d3aaeb38c4
8 changed files with 52 additions and 16 deletions
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include/net/arp.h
-9
View File
@@ -38,15 +38,6 @@ static inline struct neighbour *__ipv4_neigh_lookup(struct neigh_table *tbl, str
return n;
}
static inline struct neighbour *ipv4_neigh_lookup(struct neigh_table *tbl, struct net_device *dev, const __be32 *pkey)
{
struct neighbour *n = __ipv4_neigh_lookup(tbl, dev,
*(__force u32 *)pkey);
if (n)
return n;
return neigh_create(tbl, pkey, dev);
}
extern void arp_init(void);
extern int arp_find(unsigned char *haddr, struct sk_buff *skb);
extern int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg);
include/net/dst.h
+5
View File
@@ -387,6 +387,11 @@ static inline void dst_confirm(struct dst_entry *dst)
}
}
static inline struct neighbour *dst_neigh_lookup(const struct dst_entry *dst, const void *daddr)
{
return dst->ops->neigh_lookup(dst, daddr);
}
static inline void dst_link_failure(struct sk_buff *skb)
{
struct dst_entry *dst = skb_dst(skb);
include/net/dst_ops.h
+1
View File
@@ -26,6 +26,7 @@ struct dst_ops {
void (*link_failure)(struct sk_buff *);
void (*update_pmtu)(struct dst_entry *dst, u32 mtu);
int (*local_out)(struct sk_buff *skb);
struct neighbour * (*neigh_lookup)(const struct dst_entry *dst, const void *daddr);
struct kmem_cache *kmem_cachep;