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#!/bin/sh
echo 'config qemu network with bridge for ' $*
# If bridge is not specified, try device with default route.
bridge=$2
if [ -z "$bridge" ]; then
bridge=$(ip route list | awk '/^default / { print $NF }')
fi
# Exit if $bridge is not a bridge. Exit with 0 status
# so qemu-dm process is not terminated. No networking in
# vm is bad but not catastrophic. The vm could still run
# cpu and disk IO workloads.
# Include an useful error message in qemu-dm log file.
if [ ! -e "/sys/class/net/${bridge}/bridge" ]
then
echo "WARNING! ${bridge} is not a bridge. qemu-ifup exiting. VM may not have a functioning networking stack."
exit 0
fi
ifconfig $1 0.0.0.0 up
brctl addif $bridge $1 || true
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