mirror of
https://github.com/xen-project/xen.git
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Paul Durrant
70fea87a3a
Remove duplication of 'ip link set dev'. It is perfectly fine to call it
even if the device has already been added to the bridge.
NOTE: This patch also adds code to write a debug log entry if the device
was already on the bridge.
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Acked-by: Wei Liu <wl@xen.org>
154 lines
3.4 KiB
Bash
154 lines
3.4 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, see <http://www.gnu.org/licenses/>.
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#
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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 ! which ifup >/dev/null 2>/dev/null
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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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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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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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find_dhcpd_arg_file()
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{
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first_file -f /etc/sysconfig/dhcpd /etc/defaults/dhcp /etc/default/dhcp3-server
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}
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# configure interfaces which act as pure bridge ports:
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_setup_bridge_port() {
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local dev="$1"
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local virtual="$2"
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# take interface down ...
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ip link set dev ${dev} down
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if [ $virtual -ne 0 ] ; then
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# Initialise a dummy MAC address. We choose the numerically
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# largest non-broadcast address to prevent the address getting
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# stolen by an Ethernet bridge for STP purposes.
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# (FE:FF:FF:FF:FF:FF)
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ip link set dev ${dev} address fe:ff:ff:ff:ff:ff || true
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fi
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# ... and configure it
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ip address flush dev ${dev}
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}
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setup_physical_bridge_port() {
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_setup_bridge_port $1 0
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}
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setup_virtual_bridge_port() {
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_setup_bridge_port $1 1
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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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if which brctl >&/dev/null; 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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else
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ip link add name ${bridge} type bridge stp_state 0 forward_delay 0
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fi
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fi
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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 $bridge if it's already on the bridge.
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if [ ! -e "/sys/class/net/${bridge}/brif/${dev}" ]; then
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log debug "adding $dev to bridge $bridge"
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if which brctl >&/dev/null; then
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brctl addif ${bridge} ${dev}
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else
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ip link set ${dev} master ${bridge}
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fi
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else
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log debug "$dev already on bridge $bridge"
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fi
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ip link set dev ${dev} up
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}
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# Usage: set_mtu bridge dev
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set_mtu () {
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local bridge=$1
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local dev=$2
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mtu="`ip link show dev ${bridge}| awk '/mtu/ { print $5 }'`"
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if [ -n "$mtu" ] && [ "$mtu" -gt 0 ]
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then
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ip link set dev ${dev} mtu $mtu || :
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fi
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}
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