[TCP]: Abstract out all write queue operations.
This allows the write queue implementation to be changed,
for example, to one which allows fast interval searching.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index a9243cf..2ca97b2 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -233,7 +233,7 @@
struct tcp_sock *tp = tcp_sk(sk);
int max_probes;
- if (tp->packets_out || !sk->sk_send_head) {
+ if (tp->packets_out || !tcp_send_head(sk)) {
icsk->icsk_probes_out = 0;
return;
}
@@ -284,7 +284,7 @@
if (!tp->packets_out)
goto out;
- BUG_TRAP(!skb_queue_empty(&sk->sk_write_queue));
+ BUG_TRAP(!tcp_write_queue_empty(sk));
if (!tp->snd_wnd && !sock_flag(sk, SOCK_DEAD) &&
!((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV))) {
@@ -306,7 +306,7 @@
goto out;
}
tcp_enter_loss(sk, 0);
- tcp_retransmit_skb(sk, skb_peek(&sk->sk_write_queue));
+ tcp_retransmit_skb(sk, tcp_write_queue_head(sk));
__sk_dst_reset(sk);
goto out_reset_timer;
}
@@ -341,7 +341,7 @@
tcp_enter_loss(sk, 0);
}
- if (tcp_retransmit_skb(sk, skb_peek(&sk->sk_write_queue)) > 0) {
+ if (tcp_retransmit_skb(sk, tcp_write_queue_head(sk)) > 0) {
/* Retransmission failed because of local congestion,
* do not backoff.
*/
@@ -482,7 +482,7 @@
elapsed = keepalive_time_when(tp);
/* It is alive without keepalive 8) */
- if (tp->packets_out || sk->sk_send_head)
+ if (tp->packets_out || tcp_send_head(sk))
goto resched;
elapsed = tcp_time_stamp - tp->rcv_tstamp;