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ipv6: Add helper inet6_csk_update_pmtu().

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This is the ipv6 version of inet_csk_update_pmtu().

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2012-07-16 03:44:56 -07:00
parent 80d0a69fc5
commit 35ad9b9cf7
4 changed files with 45 additions and 78 deletions
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49
net/ipv6/inet6_connection_sock.c
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@@ -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);