[NET]: Introduce inet_connection_sock

This creates struct inet_connection_sock, moving members out of struct
tcp_sock that are shareable with other INET connection oriented
protocols, such as DCCP, that in my private tree already uses most of
these members.

The functions that operate on these members were renamed, using a
inet_csk_ prefix while not being moved yet to a new file, so as to
ease the review of these changes.

Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 10 deletions

diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index 60c6a797cc5..5f4c74f45e8 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -48,8 +48,9 @@ static struct sock *tcpnl;
 static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
 			int ext, u32 pid, u32 seq, u16 nlmsg_flags)
 {
-	struct inet_sock *inet = inet_sk(sk);
+	const struct inet_sock *inet = inet_sk(sk);
 	struct tcp_sock *tp = tcp_sk(sk);
+	const struct inet_connection_sock *icsk = inet_csk(sk);
 	struct tcpdiagmsg *r;
 	struct nlmsghdr  *nlh;
 	struct tcp_info  *info = NULL;
@@ -129,14 +130,14 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
 
 #define EXPIRES_IN_MS(tmo)  ((tmo-jiffies)*1000+HZ-1)/HZ
 
-	if (tp->pending == TCP_TIME_RETRANS) {
+	if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
 		r->tcpdiag_timer = 1;
-		r->tcpdiag_retrans = tp->retransmits;
-		r->tcpdiag_expires = EXPIRES_IN_MS(tp->timeout);
-	} else if (tp->pending == TCP_TIME_PROBE0) {
+		r->tcpdiag_retrans = icsk->icsk_retransmits;
+		r->tcpdiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
+	} else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
 		r->tcpdiag_timer = 4;
 		r->tcpdiag_retrans = tp->probes_out;
-		r->tcpdiag_expires = EXPIRES_IN_MS(tp->timeout);
+		r->tcpdiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
 	} else if (timer_pending(&sk->sk_timer)) {
 		r->tcpdiag_timer = 2;
 		r->tcpdiag_retrans = tp->probes_out;
@@ -497,7 +498,7 @@ static int tcpdiag_dump_reqs(struct sk_buff *skb, struct sock *sk,
 {
 	struct tcpdiag_entry entry;
 	struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
-	struct tcp_sock *tp = tcp_sk(sk);
+	struct inet_connection_sock *icsk = inet_csk(sk);
 	struct listen_sock *lopt;
 	struct rtattr *bc = NULL;
 	struct inet_sock *inet = inet_sk(sk);
@@ -513,9 +514,9 @@ static int tcpdiag_dump_reqs(struct sk_buff *skb, struct sock *sk,
 
 	entry.family = sk->sk_family;
 
-	read_lock_bh(&tp->accept_queue.syn_wait_lock);
+	read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
 
-	lopt = tp->accept_queue.listen_opt;
+	lopt = icsk->icsk_accept_queue.listen_opt;
 	if (!lopt || !lopt->qlen)
 		goto out;
 
@@ -572,7 +573,7 @@ static int tcpdiag_dump_reqs(struct sk_buff *skb, struct sock *sk,
 	}
 
 out:
-	read_unlock_bh(&tp->accept_queue.syn_wait_lock);
+	read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
 
 	return err;
 }