标签：qemu tap
qemu-ifup
#! /bin/sh
# Script to bring a network (tap) device for qemu-kvm up
# The idea is to add the tap device to the same bridge
# as we have default routing to.
# in order to be able to find brctl
PATH=$PATH:/sbin:/usr/sbin
ip=$(which ip)
if [ -n "$ip" ]; then
ip link set "$1" up
else
ifconfig "$1" 0.0.0.0 up
fi
brctl=$(which brctl)
if [ ! "$ip" -o ! "$brctl" ]; then
echo "W: $0: not doing any bridge processing: ip or brctl utility not found" >&2
exit 0
fi
switch=$(ip route ls | awk ‘/^default / {
for(i=0;i<NF;i++) { if ($i == "dev") { print $(i+1); next; } }
}‘
)
# only add the interface to default-route bridge if we
# have such interface (with default route) and if that
# interface is actually a bridge.
# It is possible to have several default routes too
for br in $switch; do
if [ -d /sys/class/net/$br/bridge/. ]; then
brctl addif $br "$1"
exit # exit with status of brctl
fi
done
echo "W: $0: no bridge for guest interface found" >&2标签：qemu tap
原文地址：http://btvnlue.blog.51cto.com/9578271/1916455
