1 files changed, 46 insertions, 17 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 97e5fb765265..61fac4cabc78 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -73,7 +73,7 @@ int inet_csk_bind_conflict(const struct sock *sk,
                      !sk2->sk_bound_dev_if ||
                      sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) {
                         if (!reuse || !sk2->sk_reuse ||
-                            ((1 << sk2->sk_state) & (TCPF_LISTEN | TCPF_CLOSE))) {
+                            sk2->sk_state == TCP_LISTEN) {
                                 const __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2);
                                 if (!sk2_rcv_saddr || !sk_rcv_saddr(sk) ||
                                     sk2_rcv_saddr == sk_rcv_saddr(sk))
@@ -122,8 +122,7 @@ again:
                                             (tb->num_owners < smallest_size || smallest_size == -1)) {
                                                 smallest_size = tb->num_owners;
                                                 smallest_rover = rover;
-                                                if (atomic_read(&hashinfo->bsockets) > (high - low) + 1 &&
-                                                    !inet_csk(sk)->icsk_af_ops->bind_conflict(sk, tb)) {
+                                                if (atomic_read(&hashinfo->bsockets) > (high - low) + 1) {
                                                         spin_unlock(&head->lock);
                                                         snum = smallest_rover;
                                                         goto have_snum;
@@ -351,27 +350,24 @@ void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long len)
 EXPORT_SYMBOL(inet_csk_reset_keepalive_timer);
 
 struct dst_entry *inet_csk_route_req(struct sock *sk,
+                                     struct flowi4 *fl4,
                                      const struct request_sock *req)
 {
         struct rtable *rt;
         const struct inet_request_sock *ireq = inet_rsk(req);
-        struct ip_options *opt = inet_rsk(req)->opt;
-        struct flowi fl = { .oif = sk->sk_bound_dev_if,
-                            .mark = sk->sk_mark,
-                            .fl4_dst = ((opt && opt->srr) ?
-                                          opt->faddr : ireq->rmt_addr),
-                            .fl4_src = ireq->loc_addr,
-                            .fl4_tos = RT_CONN_FLAGS(sk),
-                            .proto = sk->sk_protocol,
-                            .flags = inet_sk_flowi_flags(sk),
-                            .fl_ip_sport = inet_sk(sk)->inet_sport,
-                            .fl_ip_dport = ireq->rmt_port };
+        struct ip_options_rcu *opt = inet_rsk(req)->opt;
         struct net *net = sock_net(sk);
 
-        security_req_classify_flow(req, &fl);
-        if (ip_route_output_flow(net, &rt, &fl, sk, 0))
+        flowi4_init_output(fl4, sk->sk_bound_dev_if, sk->sk_mark,
+                           RT_CONN_FLAGS(sk), RT_SCOPE_UNIVERSE,
+                           sk->sk_protocol, inet_sk_flowi_flags(sk),
+                           (opt && opt->opt.srr) ? opt->opt.faddr : ireq->rmt_addr,
+                           ireq->loc_addr, ireq->rmt_port, inet_sk(sk)->inet_sport);
+        security_req_classify_flow(req, flowi4_to_flowi(fl4));
+        rt = ip_route_output_flow(net, fl4, sk);
+        if (IS_ERR(rt))
                 goto no_route;
-        if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
+        if (opt && opt->opt.is_strictroute && fl4->daddr != rt->rt_gateway)
                 goto route_err;
         return &rt->dst;
 
@@ -383,6 +379,39 @@ no_route:
 }
 EXPORT_SYMBOL_GPL(inet_csk_route_req);
 
+struct dst_entry *inet_csk_route_child_sock(struct sock *sk,
+                                            struct sock *newsk,
+                                            const struct request_sock *req)
+{
+        const struct inet_request_sock *ireq = inet_rsk(req);
+        struct inet_sock *newinet = inet_sk(newsk);
+        struct ip_options_rcu *opt = ireq->opt;
+        struct net *net = sock_net(sk);
+        struct flowi4 *fl4;
+        struct rtable *rt;
+
+        fl4 = &newinet->cork.fl.u.ip4;
+        flowi4_init_output(fl4, sk->sk_bound_dev_if, sk->sk_mark,
+                           RT_CONN_FLAGS(sk), RT_SCOPE_UNIVERSE,
+                           sk->sk_protocol, inet_sk_flowi_flags(sk),
+                           (opt && opt->opt.srr) ? opt->opt.faddr : ireq->rmt_addr,
+                           ireq->loc_addr, ireq->rmt_port, inet_sk(sk)->inet_sport);
+        security_req_classify_flow(req, flowi4_to_flowi(fl4));
+        rt = ip_route_output_flow(net, fl4, sk);
+        if (IS_ERR(rt))
+                goto no_route;
+        if (opt && opt->opt.is_strictroute && fl4->daddr != rt->rt_gateway)
+                goto route_err;
+        return &rt->dst;
+
+route_err:
+        ip_rt_put(rt);
+no_route:
+        IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
+        return NULL;
+}
+EXPORT_SYMBOL_GPL(inet_csk_route_child_sock);
+
 static inline u32 inet_synq_hash(const __be32 raddr, const __be16 rport,
                                  const u32 rnd, const u32 synq_hsize)
 {