tcp: Use cork flow in tcp_v4_connect()

Since this is invoked from inet_stream_connect() the socket is locked
and therefore this usage is safe.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index f3d16d8..a712171 100644 (file)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -151,7 +151,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
        struct tcp_sock *tp = tcp_sk(sk);
        __be16 orig_sport, orig_dport;
        __be32 daddr, nexthop;
-       struct flowi4 fl4;
+       struct flowi4 *fl4;
        struct rtable *rt;
        int err;
        struct ip_options_rcu *inet_opt;
@@ -173,7 +173,8 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 
        orig_sport = inet->inet_sport;
        orig_dport = usin->sin_port;
-       rt = ip_route_connect(&fl4, nexthop, inet->inet_saddr,
+       fl4 = &inet->cork.fl.u.ip4;
+       rt = ip_route_connect(fl4, nexthop, inet->inet_saddr,
                              RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
                              IPPROTO_TCP,
                              orig_sport, orig_dport, sk, true);
@@ -190,10 +191,10 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
        }
 
        if (!inet_opt || !inet_opt->opt.srr)
-               daddr = fl4.daddr;
+               daddr = fl4->daddr;
 
        if (!inet->inet_saddr)
-               inet->inet_saddr = fl4.saddr;
+               inet->inet_saddr = fl4->saddr;
        inet->inet_rcv_saddr = inet->inet_saddr;
 
        if (tp->rx_opt.ts_recent_stamp && inet->inet_daddr != daddr) {
@@ -204,7 +205,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
        }
 
        if (tcp_death_row.sysctl_tw_recycle &&
-           !tp->rx_opt.ts_recent_stamp && fl4.daddr == daddr) {
+           !tp->rx_opt.ts_recent_stamp && fl4->daddr == daddr) {
                struct inet_peer *peer = rt_get_peer(rt);
                /*
                 * VJ's idea. We save last timestamp seen from
@@ -240,7 +241,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
        if (err)
                goto failure;
 
-       rt = ip_route_newports(&fl4, rt, orig_sport, orig_dport,
+       rt = ip_route_newports(fl4, rt, orig_sport, orig_dport,
                               inet->inet_sport, inet->inet_dport, sk);
        if (IS_ERR(rt)) {
                err = PTR_ERR(rt);