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https://github.com/xen-project/xen.git
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Anil Madhavapeddy
973bbebcc3
This makes the script more idempotent if run twice (e.g. from hotplug and udev), since the second time the device will be taken down and not brought up again, leaving the host without networking. Signed-off-by: Anil Madhavapeddy <anil@xensource.com>
153 lines
3.2 KiB
Bash
153 lines
3.2 KiB
Bash
#
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# Copyright (c) 2005 XenSource Ltd.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of version 2.1 of the GNU Lesser General Public
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# License as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# On SuSE it is necessary to run a command before transfering addresses and
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# routes from the physical interface to the virtual. This command creates a
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# variable $HWD_CONFIG_0 that specifies the appropriate configuration for
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# ifup.
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# Gentoo doesn't have ifup/ifdown, so we define appropriate alternatives.
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# Other platforms just use ifup / ifdown directly.
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##
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# preiftransfer
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#
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# @param $1 The current name for the physical device, which is also the name
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# that the virtual device will take once the physical device has
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# been renamed.
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if [ -e /etc/SuSE-release ]
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then
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preiftransfer()
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{
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eval `/sbin/getcfg -d /etc/sysconfig/network/ -f ifcfg- -- $1`
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}
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ifup()
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{
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/sbin/ifup ${HWD_CONFIG_0} $1
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}
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elif ! which ifup >/dev/null 2>/dev/null
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then
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if [ -e /etc/conf.d/net ]
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then
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preiftransfer()
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{
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true
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}
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ifup()
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{
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/etc/init.d/net.$1 start
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}
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ifdown()
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{
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/etc/init.d/net.$1 stop
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}
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else
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preiftransfer()
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{
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true
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}
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ifup()
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{
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false
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}
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ifdown()
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{
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false
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}
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fi
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else
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preiftransfer()
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{
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true
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}
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fi
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first_file()
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{
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t="$1"
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shift
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for file in $@
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do
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if [ "$t" "$file" ]
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then
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echo "$file"
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return
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fi
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done
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}
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find_dhcpd_conf_file()
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{
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first_file -f /etc/dhcp3/dhcpd.conf /etc/dhcpd.conf
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}
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find_dhcpd_init_file()
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{
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first_file -x /etc/init.d/{dhcp3-server,dhcp,dhcpd}
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}
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# configure interfaces which act as pure bridge ports:
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# - make quiet: no arp, no multicast (ipv6 autoconf)
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# - set mac address to fe:ff:ff:ff:ff:ff
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setup_bridge_port() {
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local dev="$1"
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# take interface down ...
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ip link set ${dev} down
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# ... and configure it
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ip link set ${dev} arp off
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ip link set ${dev} multicast off
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ip link set ${dev} addr fe:ff:ff:ff:ff:ff
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ip addr flush ${dev}
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}
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# Usage: create_bridge bridge
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create_bridge () {
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local bridge=$1
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# Don't create the bridge if it already exists.
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if [ ! -e "/sys/class/net/${bridge}/bridge" ]; then
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brctl addbr ${bridge}
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brctl stp ${bridge} off
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brctl setfd ${bridge} 0
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ip link set ${bridge} arp off
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ip link set ${bridge} multicast off
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fi
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ip link set ${bridge} up
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}
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# Usage: add_to_bridge bridge dev
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add_to_bridge () {
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local bridge=$1
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local dev=$2
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# Don't add $dev to $bridge if it's already on a bridge.
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if [ -e "/sys/class/net/${bridge}/brif/${dev}" ]; then
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ip link set ${dev} up || true
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return
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fi
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brctl addif ${bridge} ${dev}
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ip link set ${dev} up
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}
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