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authorDavid S. Miller <davem@davemloft.net>2012-07-16 03:44:56 -0700
committerDavid S. Miller <davem@davemloft.net>2012-07-16 03:44:56 -0700
commit35ad9b9cf7d8a2e6259a0d24022e910adb6f3489 (patch)
treed9772467e072f3f1d142aa0ce2fc56ef69c57cb7 /net/ipv6/inet6_connection_sock.c
parent80d0a69fc57715dc9080c0567df1ed911b78abea (diff)
ipv6: Add helper inet6_csk_update_pmtu().
This is the ipv6 version of inet_csk_update_pmtu(). Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/inet6_connection_sock.c')
-rw-r--r--net/ipv6/inet6_connection_sock.c49
1 files changed, 35 insertions, 14 deletions
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index bceb14450a1..62539a4b2dc 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -203,15 +203,13 @@ struct dst_entry *__inet6_csk_dst_check(struct sock *sk, u32 cookie)
return dst;
}
-int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
+static struct dst_entry *inet6_csk_route_socket(struct sock *sk)
{
- struct sock *sk = skb->sk;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
- struct flowi6 fl6;
- struct dst_entry *dst;
struct in6_addr *final_p, final;
- int res;
+ struct dst_entry *dst;
+ struct flowi6 fl6;
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_proto = sk->sk_protocol;
@@ -228,18 +226,29 @@ int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
final_p = fl6_update_dst(&fl6, np->opt, &final);
dst = __inet6_csk_dst_check(sk, np->dst_cookie);
-
- if (dst == NULL) {
+ if (!dst) {
dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
- if (IS_ERR(dst)) {
- sk->sk_err_soft = -PTR_ERR(dst);
- sk->sk_route_caps = 0;
- kfree_skb(skb);
- return PTR_ERR(dst);
- }
+ if (!IS_ERR(dst))
+ __inet6_csk_dst_store(sk, dst, NULL, NULL);
+ }
+ return dst;
+}
- __inet6_csk_dst_store(sk, dst, NULL, NULL);
+int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
+{
+ struct sock *sk = skb->sk;
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct flowi6 fl6;
+ struct dst_entry *dst;
+ int res;
+
+ dst = inet6_csk_route_socket(sk);
+ if (IS_ERR(dst)) {
+ sk->sk_err_soft = -PTR_ERR(dst);
+ sk->sk_route_caps = 0;
+ kfree_skb(skb);
+ return PTR_ERR(dst);
}
rcu_read_lock();
@@ -253,3 +262,15 @@ int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
return res;
}
EXPORT_SYMBOL_GPL(inet6_csk_xmit);
+
+struct dst_entry *inet6_csk_update_pmtu(struct sock *sk, u32 mtu)
+{
+ struct dst_entry *dst = inet6_csk_route_socket(sk);
+
+ if (IS_ERR(dst))
+ return NULL;
+ dst->ops->update_pmtu(dst, mtu);
+
+ return inet6_csk_route_socket(sk);
+}
+EXPORT_SYMBOL_GPL(inet6_csk_update_pmtu);