From: Derrick Brashear <shadow@dementia.org>
Date: Fri, 1 Oct 2010 03:57:11 +0000 (-0400)
Subject: exempt instant timeouts from mtu discovery
X-Git-Tag: openafs-devel-1_7_1~1485
X-Git-Url: https://git.openafs.org/?p=openafs.git;a=commitdiff_plain;h=0ecc90f3cd3f5a7c96b3689ab0c5f6a42edc3ed0

exempt instant timeouts from mtu discovery

if we set lastReceiveTime to 0 to hint that no net, honor that here as
"just time out"

Change-Id: Ifb06fad782669649027841e3930ff94600b6c900
Reviewed-on: http://gerrit.openafs.org/2875
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
---

diff --git a/src/rx/rx.c b/src/rx/rx.c
index 73a5d57..9302d42 100644
--- a/src/rx/rx.c
+++ b/src/rx/rx.c
@@ -5980,11 +5980,12 @@ rxi_CheckCall(struct rx_call *call)
     }
     return 0;
 mtuout:
-    if (conn->msgsizeRetryErr && cerror != RX_CALL_TIMEOUT) {
+    if (conn->msgsizeRetryErr && cerror != RX_CALL_TIMEOUT
+	&& call->lastReceiveTime) {
 	int oldMTU = conn->peer->ifMTU;
 
 	/* if we thought we could send more, perhaps things got worse */
-	if (call->conn->peer->maxPacketSize > conn->lastPacketSize)
+	if (conn->peer->maxPacketSize > conn->lastPacketSize)
 	    /* maxpacketsize will be cleared in rxi_SetPeerMtu */
 	    newmtu = MAX(conn->peer->maxPacketSize-RX_IPUDP_SIZE,
 			 conn->lastPacketSize-(128+RX_IPUDP_SIZE));