X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=net%2Fipv4%2Ftcp_input.c;h=6e46b4c0f28cd4e3a22e5267e4fd2076240e4820;hb=68528f09980a60c8df046d16336333cac4fc0c32;hp=19c449f62672d7cf41f03a65f6d6dbc0cc3b3c04;hpb=256ae6a720618cbbfacc5e62ea1fe7c129d1b644;p=linux-2.6-omap-h63xx.git

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 19c449f6267..6e46b4c0f28 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1367,7 +1367,7 @@ static struct sk_buff *tcp_sacktag_walk(struct sk_buff *skb, struct sock *sk,
  * a normal way
  */
 static struct sk_buff *tcp_sacktag_skip(struct sk_buff *skb, struct sock *sk,
-					u32 skip_to_seq)
+					u32 skip_to_seq, int *fack_count)
 {
 	tcp_for_write_queue_from(skb, sk) {
 		if (skb == tcp_send_head(sk))
@@ -1375,6 +1375,8 @@ static struct sk_buff *tcp_sacktag_skip(struct sk_buff *skb, struct sock *sk,
 
 		if (!before(TCP_SKB_CB(skb)->end_seq, skip_to_seq))
 			break;
+
+		*fack_count += tcp_skb_pcount(skb);
 	}
 	return skb;
 }
@@ -1390,7 +1392,7 @@ static struct sk_buff *tcp_maybe_skipping_dsack(struct sk_buff *skb,
 		return skb;
 
 	if (before(next_dup->start_seq, skip_to_seq)) {
-		skb = tcp_sacktag_skip(skb, sk, next_dup->start_seq);
+		skb = tcp_sacktag_skip(skb, sk, next_dup->start_seq, fack_count);
 		tcp_sacktag_walk(skb, sk, NULL,
 				 next_dup->start_seq, next_dup->end_seq,
 				 1, fack_count, reord, flag);
@@ -1537,7 +1539,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 
 			/* Head todo? */
 			if (before(start_seq, cache->start_seq)) {
-				skb = tcp_sacktag_skip(skb, sk, start_seq);
+				skb = tcp_sacktag_skip(skb, sk, start_seq,
+						       &fack_count);
 				skb = tcp_sacktag_walk(skb, sk, next_dup,
 						       start_seq,
 						       cache->start_seq,
@@ -1565,7 +1568,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 				goto walk;
 			}
 
-			skb = tcp_sacktag_skip(skb, sk, cache->end_seq);
+			skb = tcp_sacktag_skip(skb, sk, cache->end_seq,
+					       &fack_count);
 			/* Check overlap against next cached too (past this one already) */
 			cache++;
 			continue;
@@ -1577,7 +1581,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 				break;
 			fack_count = tp->fackets_out;
 		}
-		skb = tcp_sacktag_skip(skb, sk, start_seq);
+		skb = tcp_sacktag_skip(skb, sk, start_seq, &fack_count);
 
 walk:
 		skb = tcp_sacktag_walk(skb, sk, next_dup, start_seq, end_seq,
@@ -3557,7 +3561,7 @@ static void tcp_fin(struct sk_buff *skb, struct sock *sk, struct tcphdr *th)
 		 * cases we should never reach this piece of code.
 		 */
 		printk(KERN_ERR "%s: Impossible, sk->sk_state=%d\n",
-		       __FUNCTION__, sk->sk_state);
+		       __func__, sk->sk_state);
 		break;
 	}
 
@@ -4447,6 +4451,49 @@ static void tcp_urg(struct sock *sk, struct sk_buff *skb, struct tcphdr *th)
 	}
 }
 
+static int tcp_defer_accept_check(struct sock *sk)
+{
+	struct tcp_sock *tp = tcp_sk(sk);
+
+	if (tp->defer_tcp_accept.request) {
+		int queued_data =  tp->rcv_nxt - tp->copied_seq;
+		int hasfin =  !skb_queue_empty(&sk->sk_receive_queue) ?
+			tcp_hdr((struct sk_buff *)
+				sk->sk_receive_queue.prev)->fin : 0;
+
+		if (queued_data && hasfin)
+			queued_data--;
+
+		if (queued_data &&
+		    tp->defer_tcp_accept.listen_sk->sk_state == TCP_LISTEN) {
+			if (sock_flag(sk, SOCK_KEEPOPEN)) {
+				inet_csk_reset_keepalive_timer(sk,
+							       keepalive_time_when(tp));
+			} else {
+				inet_csk_delete_keepalive_timer(sk);
+			}
+
+			inet_csk_reqsk_queue_add(
+				tp->defer_tcp_accept.listen_sk,
+				tp->defer_tcp_accept.request,
+				sk);
+
+			tp->defer_tcp_accept.listen_sk->sk_data_ready(
+				tp->defer_tcp_accept.listen_sk, 0);
+
+			sock_put(tp->defer_tcp_accept.listen_sk);
+			sock_put(sk);
+			tp->defer_tcp_accept.listen_sk = NULL;
+			tp->defer_tcp_accept.request = NULL;
+		} else if (hasfin ||
+			   tp->defer_tcp_accept.listen_sk->sk_state != TCP_LISTEN) {
+			tcp_reset(sk);
+			return -1;
+		}
+	}
+	return 0;
+}
+
 static int tcp_copy_to_iovec(struct sock *sk, struct sk_buff *skb, int hlen)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
@@ -4807,6 +4854,9 @@ step5:
 
 	tcp_data_snd_check(sk);
 	tcp_ack_snd_check(sk);
+
+	if (tcp_defer_accept_check(sk))
+		return -1;
 	return 0;
 
 csum_error:
@@ -5326,6 +5376,7 @@ discard:
 
 EXPORT_SYMBOL(sysctl_tcp_ecn);
 EXPORT_SYMBOL(sysctl_tcp_reordering);
+EXPORT_SYMBOL(sysctl_tcp_adv_win_scale);
 EXPORT_SYMBOL(tcp_parse_options);
 EXPORT_SYMBOL(tcp_rcv_established);
 EXPORT_SYMBOL(tcp_rcv_state_process);