With changeset 22885 support was added for setting the MTU in the vif-bridge
script for when a vif interface was set to 'online'. The was not done for the
'add' operation. The 'add' operation was added to the script for when tap
devices were specified (c/s 21944). With the setting of the MTU for the
'online' case was there a reason for omitting the 'add'?
This patch sets the MTU for both 'online' and 'add' in the vif-bridge script.
Signed-off-by: Charles Arnold <carnold@suse.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Avoid applying to the bridge and physical network device.
This should un-break dom0 networking in the old xend-creates-bridge
setup (problem introduced in 22493:937488219719).
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Most versions of netback do not support setting the MAC address. This
means that c/s 937488219719 causes the hotplug script to break for
vifs, even as it fixes the bridge-wrong-MAC-address problem for tap
devices (used for emulated nics).
The mac-setting operation is not necessary for vifs since they are
hardcoded to fe:ff* anyway.
As a band-aid, add "|| true" to the call to ip link, so that this
error does not cause the hotplug operation to fail. There will still
be an error message printed until we can fix this better.
Suggested-by: Ian Campbell <Ian.Campbell@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
If a tap device is not given an explicit MAC address it will generate
one randomly.
The behaviour of the Linux bridge is to pickup the lowest MAC address
of any port for use in for ARP, STP etc. If the tap device's randomly
generated MAC address happens to be the lowest then this can cause all
manner of strange networking glitches in both domain 0 and guests when
the bridge suddenly takes over from the previously used MAC address.
We choose FE:FF:FF:FF:FF:FF as it the numerically largest
non-broadcast address. This ensures that the physical NIC device's
port will have the lowest MAC address and therefore be the one picked
up by the bridge.
vif devices already have a MAC address of FE:FF:FF:FF:FF:FF set by
netback already but there is no harm in forcing it a second time in
the hotplug script.
tap devices are added by the "add" event and therefore we should call
setup_bridge_port then as well as for "online" which is caused by vif
devices.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Charles Arnold
Ian Campbell
Ian Jackson
Keir Fraser