From: Vlad Yasevich <vladislav.yasevich@hp.com>
Date: Fri, 11 Jan 2008 15:12:56 +0000 (-0500)
Subject: [SCTP]: Do not increase rwnd when reading partial notification.
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0eca8fee0ce3fa0962ac98ab30c10995754a3195;p=deliverable%2Flinux.git

[SCTP]: Do not increase rwnd when reading partial notification.

When a user reads a partial notification message, do not
update rwnd since notifications must not be counted towards
receive window.

Tested-by: Oliver Roll <mail@oliroll.de>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
---

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 401dac618406..894c278c8cdc 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -1911,7 +1911,8 @@ SCTP_STATIC int sctp_recvmsg(struct kiocb *iocb, struct sock *sk,
 		 * rwnd by that amount. If all the data in the skb is read,
 		 * rwnd is updated when the event is freed.
 		 */
-		sctp_assoc_rwnd_increase(event->asoc, copied);
+		if (!sctp_ulpevent_is_notification(event))
+			sctp_assoc_rwnd_increase(event->asoc, copied);
 		goto out;
 	} else if ((event->msg_flags & MSG_NOTIFICATION) ||
 		   (event->msg_flags & MSG_EOR))