Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1699 commits)
  bnx2/bnx2x: Unsupported Ethtool operations should return -EINVAL.
  vlan: Calling vlan_hwaccel_do_receive() is always valid.
  tproxy: use the interface primary IP address as a default value for --on-ip
  tproxy: added IPv6 support to the socket match
  cxgb3: function namespace cleanup
  tproxy: added IPv6 support to the TPROXY target
  tproxy: added IPv6 socket lookup function to nf_tproxy_core
  be2net: Changes to use only priority codes allowed by f/w
  tproxy: allow non-local binds of IPv6 sockets if IP_TRANSPARENT is enabled
  tproxy: added tproxy sockopt interface in the IPV6 layer
  tproxy: added udp6_lib_lookup function
  tproxy: added const specifiers to udp lookup functions
  tproxy: split off ipv6 defragmentation to a separate module
  l2tp: small cleanup
  nf_nat: restrict ICMP translation for embedded header
  can: mcp251x: fix generation of error frames
  can: mcp251x: fix endless loop in interrupt handler if CANINTF_MERRF is set
  can-raw: add msg_flags to distinguish local traffic
  9p: client code cleanup
  rds: make local functions/variables static
  ...

Fix up conflicts in net/core/dev.c, drivers/net/pcmcia/smc91c92_cs.c and
drivers/net/wireless/ath/ath9k/debug.c as per David

1 files changed, 18 insertions, 13 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index de3bd845858..05b1ecf3676 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -224,16 +224,10 @@ void tcp_select_initial_window(int __space, __u32 mss,
 		}
 	}
 
-	/* Set initial window to value enough for senders,
-	 * following RFC2414. Senders, not following this RFC,
-	 * will be satisfied with 2.
-	 */
+	/* Set initial window to value enough for senders, following RFC5681. */
 	if (mss > (1 << *rcv_wscale)) {
-		int init_cwnd = 4;
-		if (mss > 1460 * 3)
-			init_cwnd = 2;
-		else if (mss > 1460)
-			init_cwnd = 3;
+		int init_cwnd = rfc3390_bytes_to_packets(mss);
+
 		/* when initializing use the value from init_rcv_wnd
 		 * rather than the default from above
 		 */
@@ -1376,9 +1370,9 @@ static inline int tcp_nagle_check(const struct tcp_sock *tp,
 				  const struct sk_buff *skb,
 				  unsigned mss_now, int nonagle)
 {
-	return (skb->len < mss_now &&
+	return skb->len < mss_now &&
 		((nonagle & TCP_NAGLE_CORK) ||
-		 (!nonagle && tp->packets_out && tcp_minshall_check(tp))));
+		 (!nonagle && tp->packets_out && tcp_minshall_check(tp)));
 }
 
 /* Return non-zero if the Nagle test allows this packet to be
@@ -1449,10 +1443,10 @@ int tcp_may_send_now(struct sock *sk)
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct sk_buff *skb = tcp_send_head(sk);
 
-	return (skb &&
+	return skb &&
 		tcp_snd_test(sk, skb, tcp_current_mss(sk),
 			     (tcp_skb_is_last(sk, skb) ?
-			      tp->nonagle : TCP_NAGLE_PUSH)));
+			      tp->nonagle : TCP_NAGLE_PUSH));
 }
 
 /* Trim TSO SKB to LEN bytes, put the remaining data into a new packet
@@ -2429,6 +2423,12 @@ struct sk_buff *tcp_make_synack(struct sock *sk, struct dst_entry *dst,
 		__u8 rcv_wscale;
 		/* Set this up on the first call only */
 		req->window_clamp = tp->window_clamp ? : dst_metric(dst, RTAX_WINDOW);
+
+		/* limit the window selection if the user enforce a smaller rx buffer */
+		if (sk->sk_userlocks & SOCK_RCVBUF_LOCK &&
+		    (req->window_clamp > tcp_full_space(sk) || req->window_clamp == 0))
+			req->window_clamp = tcp_full_space(sk);
+
 		/* tcp_full_space because it is guaranteed to be the first packet */
 		tcp_select_initial_window(tcp_full_space(sk),
 			mss - (ireq->tstamp_ok ? TCPOLEN_TSTAMP_ALIGNED : 0),
@@ -2555,6 +2555,11 @@ static void tcp_connect_init(struct sock *sk)
 
 	tcp_initialize_rcv_mss(sk);
 
+	/* limit the window selection if the user enforce a smaller rx buffer */
+	if (sk->sk_userlocks & SOCK_RCVBUF_LOCK &&
+	    (tp->window_clamp > tcp_full_space(sk) || tp->window_clamp == 0))
+		tp->window_clamp = tcp_full_space(sk);
+
 	tcp_select_initial_window(tcp_full_space(sk),
 				  tp->advmss - (tp->rx_opt.ts_recent_stamp ? tp->tcp_header_len - sizeof(struct tcphdr) : 0),
 				  &tp->rcv_wnd,