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authorHerbert Xu <herbert@gondor.apana.org.au>2006-07-30 23:19:33 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-08-02 16:38:14 -0400
commit497c615abad7ee81994dd592194535aea2aad617 (patch)
tree86bb23e49071ea1bc867232d576b2d4ece31eb4d /include/net/ip6_route.h
parent679e898a4742d4a4a47430b67fd68a789a73dcfd (diff)
[IPV6]: Audit all ip6_dst_lookup/ip6_dst_store calls
The current users of ip6_dst_lookup can be divided into two classes: 1) The caller holds no locks and is in user-context (UDP). 2) The caller does not want to lookup the dst cache at all. The second class covers everyone except UDP because most people do the cache lookup directly before calling ip6_dst_lookup. This patch adds ip6_sk_dst_lookup for the first class. Similarly ip6_dst_store users can be divded into those that need to take the socket dst lock and those that don't. This patch adds __ip6_dst_store for those (everyone except UDP/datagram) that don't need an extra lock. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip6_route.h')
-rw-r--r--include/net/ip6_route.h12
1 files changed, 9 insertions, 3 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index ab29dafb1a6a..96b0e66406ec 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -139,16 +139,22 @@ extern rwlock_t rt6_lock;
139/* 139/*
140 * Store a destination cache entry in a socket 140 * Store a destination cache entry in a socket
141 */ 141 */
142static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, 142static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
143 struct in6_addr *daddr) 143 struct in6_addr *daddr)
144{ 144{
145 struct ipv6_pinfo *np = inet6_sk(sk); 145 struct ipv6_pinfo *np = inet6_sk(sk);
146 struct rt6_info *rt = (struct rt6_info *) dst; 146 struct rt6_info *rt = (struct rt6_info *) dst;
147 147
148 write_lock(&sk->sk_dst_lock);
149 sk_setup_caps(sk, dst); 148 sk_setup_caps(sk, dst);
150 np->daddr_cache = daddr; 149 np->daddr_cache = daddr;
151 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; 150 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
151}
152
153static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
154 struct in6_addr *daddr)
155{
156 write_lock(&sk->sk_dst_lock);
157 __ip6_dst_store(sk, dst, daddr);
152 write_unlock(&sk->sk_dst_lock); 158 write_unlock(&sk->sk_dst_lock);
153} 159}
154 160