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[TCP]: Replace socket with sock for reset sending.

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Replace tcp_socket with tcp_sock. This is more effective (less
derefferences on fast paths). Additionally, the approach is unified to
one used in ICMP.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2008-04-03 14:19:38 -07:00 committed by David S. Miller
parent a4aa834a91
commit 14c0c8e8e0
1 changed files with 6 additions and 4 deletions
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10
net/ipv4/tcp_ipv4.c
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@ -89,7 +89,7 @@ int sysctl_tcp_low_latency __read_mostly;
#define ICMP_MIN_LENGTH 8
/* Socket used for sending RSTs */
static struct socket *tcp_socket __read_mostly;
static struct sock *tcp_sock __read_mostly;
void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
@ -598,7 +598,7 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb)
sizeof(struct tcphdr), IPPROTO_TCP, 0);
arg.csumoffset = offsetof(struct tcphdr, check) / 2;
ip_send_reply(tcp_socket->sk, skb, &arg, arg.iov[0].iov_len);
ip_send_reply(tcp_sock, skb, &arg, arg.iov[0].iov_len);
TCP_INC_STATS_BH(TCP_MIB_OUTSEGS);
TCP_INC_STATS_BH(TCP_MIB_OUTRSTS);
@ -693,7 +693,7 @@ static void tcp_v4_send_ack(struct tcp_timewait_sock *twsk,
if (twsk)
arg.bound_dev_if = twsk->tw_sk.tw_bound_dev_if;
ip_send_reply(tcp_socket->sk, skb, &arg, arg.iov[0].iov_len);
ip_send_reply(tcp_sock, skb, &arg, arg.iov[0].iov_len);
TCP_INC_STATS_BH(TCP_MIB_OUTSEGS);
}
@ -2490,9 +2490,11 @@ struct proto tcp_prot = {
void __init tcp_v4_init(void)
{
if (inet_csk_ctl_sock_create(&tcp_socket, PF_INET, SOCK_RAW,
struct socket *__tcp_socket;
if (inet_csk_ctl_sock_create(&__tcp_socket, PF_INET, SOCK_RAW,
IPPROTO_TCP) < 0)
panic("Failed to create the TCP control socket.\n");
tcp_sock = __tcp_socket->sk;
}
EXPORT_SYMBOL(ipv4_specific);