inet: prepare struct net for TCP MIB accounting
This is the same as the first patch in the set, but preparing
the net for TCP_XXX_STATS - save the struct net on the stack
where required and possible.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 7797d52..db3bf9b 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -544,6 +544,7 @@
#ifdef CONFIG_TCP_MD5SIG
struct tcp_md5sig_key *key;
#endif
+ struct net *net;
/* Never send a reset in response to a reset. */
if (th->rst)
@@ -594,7 +595,8 @@
sizeof(struct tcphdr), IPPROTO_TCP, 0);
arg.csumoffset = offsetof(struct tcphdr, check) / 2;
- ip_send_reply(dev_net(skb->dst->dev)->ipv4.tcp_sock, skb,
+ net = dev_net(skb->dst->dev);
+ ip_send_reply(net->ipv4.tcp_sock, skb,
&arg, arg.iov[0].iov_len);
TCP_INC_STATS_BH(TCP_MIB_OUTSEGS);
@@ -619,6 +621,7 @@
];
} rep;
struct ip_reply_arg arg;
+ struct net *net = dev_net(skb->dev);
memset(&rep.th, 0, sizeof(struct tcphdr));
memset(&arg, 0, sizeof(arg));
@@ -668,7 +671,7 @@
if (oif)
arg.bound_dev_if = oif;
- ip_send_reply(dev_net(skb->dev)->ipv4.tcp_sock, skb,
+ ip_send_reply(net->ipv4.tcp_sock, skb,
&arg, arg.iov[0].iov_len);
TCP_INC_STATS_BH(TCP_MIB_OUTSEGS);
@@ -1505,6 +1508,7 @@
struct tcphdr *th;
struct sock *sk;
int ret;
+ struct net *net = dev_net(skb->dev);
if (skb->pkt_type != PACKET_HOST)
goto discard_it;
@@ -1539,7 +1543,7 @@
TCP_SKB_CB(skb)->flags = iph->tos;
TCP_SKB_CB(skb)->sacked = 0;
- sk = __inet_lookup(dev_net(skb->dev), &tcp_hashinfo, iph->saddr,
+ sk = __inet_lookup(net, &tcp_hashinfo, iph->saddr,
th->source, iph->daddr, th->dest, inet_iif(skb));
if (!sk)
goto no_tcp_socket;