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ipv4: Use cork flow in inet_sk_{reselect_saddr,rebuild_header}()

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These two functions must be invoked only when the socket is locked
(because socket identity modifications are made non-atomically).

Therefore we can use the cork flow for output route lookups.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2011-05-06 16:18:04 -07:00
parent 3038eeac02
commit 6e86913810
1 changed files with 7 additions and 5 deletions
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12
net/ipv4/af_inet.c
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@ -1103,7 +1103,7 @@ static int inet_sk_reselect_saddr(struct sock *sk)
struct inet_sock *inet = inet_sk(sk);
__be32 old_saddr = inet->inet_saddr;
__be32 daddr = inet->inet_daddr;
struct flowi4 fl4;
struct flowi4 *fl4;
struct rtable *rt;
__be32 new_saddr;
struct ip_options_rcu *inet_opt;
@ -1114,7 +1114,8 @@ static int inet_sk_reselect_saddr(struct sock *sk)
daddr = inet_opt->opt.faddr;
/* Query new route. */
rt = ip_route_connect(&fl4, daddr, 0, RT_CONN_FLAGS(sk),
fl4 = &inet->cork.fl.u.ip4;
rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk),
sk->sk_bound_dev_if, sk->sk_protocol,
inet->inet_sport, inet->inet_dport, sk, false);
if (IS_ERR(rt))
@ -1122,7 +1123,7 @@ static int inet_sk_reselect_saddr(struct sock *sk)
sk_setup_caps(sk, &rt->dst);
new_saddr = fl4.saddr;
new_saddr = fl4->saddr;
if (new_saddr == old_saddr)
return 0;
@ -1152,7 +1153,7 @@ int inet_sk_rebuild_header(struct sock *sk)
struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0);
__be32 daddr;
struct ip_options_rcu *inet_opt;
struct flowi4 fl4;
struct flowi4 *fl4;
int err;
/* Route is OK, nothing to do. */
@ -1166,7 +1167,8 @@ int inet_sk_rebuild_header(struct sock *sk)
if (inet_opt && inet_opt->opt.srr)
daddr = inet_opt->opt.faddr;
rcu_read_unlock();
rt = ip_route_output_ports(sock_net(sk), &fl4, sk, daddr, inet->inet_saddr,
fl4 = &inet->cork.fl.u.ip4;
rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr,
inet->inet_dport, inet->inet_sport,
sk->sk_protocol, RT_CONN_FLAGS(sk),
sk->sk_bound_dev_if);