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[Xen-changelog] [xen-unstable] tools/hotplug: set mtu from bridge also o

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Subject: [Xen-changelog] [xen-unstable] tools/hotplug: set mtu from bridge also on vif interface
From: Xen patchbot-unstable <patchbot@xxxxxxx>
Date: Wed, 09 Feb 2011 06:50:41 -0800
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# HG changeset patch
# User Olaf Hering <olaf@xxxxxxxxx>
# Date 1297097725 0
# Node ID 005722613063d5a95005b2296979cdcad8eddfc3
# Parent  e4406b9fb06419bb09570a27f6668abeb3ae427f
tools/hotplug: set mtu from bridge also on vif interface

Apply mtu size from bridge interface also in vif interface.
This depends on a kernel change which allows arbitrary mtu sizes until
the frontend driver has connected to the backend driver. Without this
kernel change, the vif mtu size will be limited to 1500 even with this
change to the vif-bridge script.

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Acked-by: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
 tools/hotplug/Linux/vif-bridge |    5 +++++
 1 files changed, 5 insertions(+)

diff -r e4406b9fb064 -r 005722613063 tools/hotplug/Linux/vif-bridge
--- a/tools/hotplug/Linux/vif-bridge    Mon Feb 07 15:04:32 2011 +0000
+++ b/tools/hotplug/Linux/vif-bridge    Mon Feb 07 16:55:25 2011 +0000
@@ -82,6 +82,11 @@ case "$command" in
 case "$command" in
         setup_virtual_bridge_port "$dev"
+        mtu="`ip link show $bridge | awk '/mtu/ { print $5 }'`"
+        if [ -n "$mtu" ] && [ "$mtu" -gt 0 ]
+        then
+                ip link set $dev mtu $mtu || :
+        fi
         add_to_bridge "$bridge" "$dev"

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