ipv4: Cache net in ip_build_and_send_pkt and ip_queue_xmit

Compute net and store it in a variable in the functions
ip_build_and_send_pkt and ip_queue_xmit so that it does not need to be
recomputed next time it is needed.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 10366ee03becc8823ba938d2767e259cdf704a68..a7012f2fa68a9ca9e1c74c3163ec5d29b145fae6 100644 (file)
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -139,6 +139,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, const struct sock *sk,
 {
        struct inet_sock *inet = inet_sk(sk);
        struct rtable *rt = skb_rtable(skb);
+       struct net *net = sock_net(sk);
        struct iphdr *iph;
 
        /* Build the IP header. */
@@ -157,7 +158,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, const struct sock *sk,
                iph->id = 0;
        } else {
                iph->frag_off = 0;
-               __ip_select_ident(sock_net(sk), iph, 1);
+               __ip_select_ident(net, iph, 1);
        }
 
        if (opt && opt->opt.optlen) {
@@ -382,6 +383,7 @@ static void ip_copy_addrs(struct iphdr *iph, const struct flowi4 *fl4)
 int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl)
 {
        struct inet_sock *inet = inet_sk(sk);
+       struct net *net = sock_net(sk);
        struct ip_options_rcu *inet_opt;
        struct flowi4 *fl4;
        struct rtable *rt;
@@ -412,7 +414,7 @@ int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl)
                 * keep trying until route appears or the connection times
                 * itself out.
                 */
-               rt = ip_route_output_ports(sock_net(sk), fl4, sk,
+               rt = ip_route_output_ports(net, fl4, sk,
                                           daddr, inet->inet_saddr,
                                           inet->inet_dport,
                                           inet->inet_sport,
@@ -449,7 +451,7 @@ packet_routed:
                ip_options_build(skb, &inet_opt->opt, inet->inet_daddr, rt, 0);
        }
 
-       ip_select_ident_segs(sock_net(sk), skb, sk,
+       ip_select_ident_segs(net, skb, sk,
                             skb_shinfo(skb)->gso_segs ?: 1);
 
        /* TODO : should we use skb->sk here instead of sk ? */
@@ -462,7 +464,7 @@ packet_routed:
 
 no_route:
        rcu_read_unlock();
-       IP_INC_STATS(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);
+       IP_INC_STATS(net, IPSTATS_MIB_OUTNOROUTES);
        kfree_skb(skb);
        return -EHOSTUNREACH;
 }