static inline
void __inet6_csk_dst_store(struct sock *sk, struct dst_entry *dst,
- struct in6_addr *daddr, struct in6_addr *saddr)
+ const struct in6_addr *daddr,
+ const struct in6_addr *saddr)
{
__ip6_dst_store(sk, dst, daddr, saddr);
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 flowi6 *fl6)
{
- 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;
- memset(&fl6, 0, sizeof(fl6));
- fl6.flowi6_proto = sk->sk_protocol;
- fl6.daddr = np->daddr;
- fl6.saddr = np->saddr;
- fl6.flowlabel = np->flow_label;
- IP6_ECN_flow_xmit(sk, fl6.flowlabel);
- fl6.flowi6_oif = sk->sk_bound_dev_if;
- fl6.flowi6_mark = sk->sk_mark;
- fl6.fl6_sport = inet->inet_sport;
- fl6.fl6_dport = inet->inet_dport;
- security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
+ memset(fl6, 0, sizeof(*fl6));
+ fl6->flowi6_proto = sk->sk_protocol;
+ fl6->daddr = np->daddr;
+ fl6->saddr = np->saddr;
+ fl6->flowlabel = np->flow_label;
+ IP6_ECN_flow_xmit(sk, fl6->flowlabel);
+ fl6->flowi6_oif = sk->sk_bound_dev_if;
+ fl6->flowi6_mark = sk->sk_mark;
+ fl6->fl6_sport = inet->inet_sport;
+ fl6->fl6_dport = inet->inet_dport;
+ security_sk_classify_flow(sk, flowi6_to_flowi(fl6));
- final_p = fl6_update_dst(&fl6, np->opt, &final);
+ final_p = fl6_update_dst(fl6, np->opt, &final);
dst = __inet6_csk_dst_check(sk, np->dst_cookie);
+ if (!dst) {
+ dst = ip6_dst_lookup_flow(sk, fl6, final_p, false);
- if (dst == NULL) {
- dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
+ if (!IS_ERR(dst))
+ __inet6_csk_dst_store(sk, dst, NULL, NULL);
+ }
+ return dst;
+}
- if (IS_ERR(dst)) {
- sk->sk_err_soft = -PTR_ERR(dst);
- sk->sk_route_caps = 0;
- kfree_skb(skb);
- return PTR_ERR(dst);
- }
+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;
- __inet6_csk_dst_store(sk, dst, NULL, NULL);
+ dst = inet6_csk_route_socket(sk, &fl6);
+ 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();
return res;
}
EXPORT_SYMBOL_GPL(inet6_csk_xmit);
+
+struct dst_entry *inet6_csk_update_pmtu(struct sock *sk, u32 mtu)
+{
+ struct flowi6 fl6;
+ struct dst_entry *dst = inet6_csk_route_socket(sk, &fl6);
+
+ if (IS_ERR(dst))
+ return NULL;
+ dst->ops->update_pmtu(dst, sk, NULL, mtu);
+
+ return inet6_csk_route_socket(sk, &fl6);
+}
+EXPORT_SYMBOL_GPL(inet6_csk_update_pmtu);