xenserver/etc_xensource_scripts_vif

   1 #!/bin/sh
   2
   3 # Copyright (C) 2008,2009 Citrix Systems, Inc.
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU Lesser General Public License as published
   7 # by the Free Software Foundation; version 2.1 only. with the special
   8 # exception on linking described in file LICENSE.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU Lesser General Public License for more details.
  14
  15 # CA-23900: Warning: when VIFs are added to windows guests with PV drivers the backend vif device is registered,
  16 # unregistered and then registered again. This causes the udev event to fire twice and this script runs twice.
  17 # Since the first invocation of the script races with the device unregistration, spurious errors are possible
  18 # which will be logged but are safe to ignore since the second script invocation should complete the operation.
  19 # Note that each script invocation is run synchronously from udev and so the scripts don't race with each other.
  20
  21 # Keep other-config/ keys in sync with device.ml:vif_udev_keys
  22
  23 BRCTL="/usr/sbin/brctl"
  24 IP="/sbin/ip"
  25
  26 vsctl="/usr/bin/ovs-vsctl"
  27 dump_vif_details="/usr/share/vswitch/scripts/dump-vif-details"
  28
  29 handle_promiscuous()
  30 {
  31     local arg=$(xenstore-read "${PRIVATE}/other-config/promiscuous" 2>/dev/null)
  32     if [ $? -eq 0 -a -n "${arg}" ] ; then
  33         case $NETWORK_MODE in
  34             bridge)
  35                 case "${arg}" in
  36                     true|on) echo 1 > /sys/class/net/${dev}/brport/promisc ;;
  37                     *) echo 0 > /sys/class/net/${dev}/brport/promisc ;;
  38                 esac
  39                 ;;
  40             vswitch)
  41                 logger -t script-vif "${dev}: Promiscuous ports are not supported via vSwitch."
  42                 ;;
  43         esac
  44     fi
  45 }
  46
  47 handle_ethtool()
  48 {
  49     local opt=$1
  50     local arg=$(xenstore-read "${PRIVATE}/other-config/ethtool-${opt}" 2>/dev/null)
  51     if [ $? -eq 0 -a -n "${arg}" ] ; then
  52         case "${arg}" in
  53             true|on)   /sbin/ethtool -K "${dev}" "${opt}" on ;;
  54             false|off) /sbin/ethtool -K "${dev}" "${opt}" off ;;
  55             *) logger -t scripts-vif "Unknown ethtool argument ${opt}=${arg} on ${dev}/${VIFUUID}" ;;
  56         esac
  57     fi
  58 }
  59
  60 handle_mtu()
  61 {
  62     local mtu=$(xenstore-read "${PRIVATE}/MTU" 2>/dev/null)
  63     if [ $? -eq 0 -a -n "${mtu}" ]; then
  64         logger -t scripts-vif "Setting ${dev} MTU ${mtu}"
  65         ${IP} link set "${dev}" mtu ${mtu} || logger -t scripts-vif "Failed to ip link set ${dev} mtu ${mtu}. Error code $?"
  66     fi
  67 }
  68
  69 set_vif_external_id()
  70 {
  71     local key=$1
  72     local value=$2
  73
  74     logger -t scripts-vif "vif${DOMID}.${DEVID} external-ids:\"${key}\"=\"${value}\""
  75
  76     echo "-- set interface vif${DOMID}.${DEVID} external-ids:\"${key}\"=\"${value}\""
  77 }
  78
  79 handle_vswitch_vif_details()
  80 {
  81     local vif_details=
  82     local net_uuid=$(xenstore-read "${PRIVATE}/network-uuid" 2>/dev/null)
  83     if [ -n "${net_uuid}" ] ; then
  84         set_vif_external_id "xs-network-uuid" "${net_uuid}"
  85     fi
  86
  87     local address=$(xenstore-read "/local/domain/$DOMID/device/vif/$DEVID/mac" 2>/dev/null)
  88     if [ -n "${address}" ] ; then
  89         set_vif_external_id "xs-vif-mac" "${address}"
  90     fi
  91
  92     local vif_uuid=$(xenstore-read "${PRIVATE}/vif-uuid" 2>/dev/null)
  93     if [ -n "${vif_uuid}" ] ; then
  94         set_vif_external_id "xs-vif-uuid" "${vif_uuid}"
  95     fi
  96
  97     local vm=$(xenstore-read "/local/domain/$DOMID/vm" 2>/dev/null)
  98     if [ $? -eq 0 -a -n "${vm}" ] ; then
  99         local vm_uuid=$(xenstore-read "$vm/uuid" 2>/dev/null)
 100     fi
 101     if [ -n "${vm_uuid}" ] ; then
 102         set_vif_external_id "xs-vm-uuid" "${vm_uuid}"
 103     fi
 104 }
 105
 106 add_to_bridge()
 107 {
 108     local address=$(xenstore-read "${PRIVATE}/bridge-MAC")
 109     if [ $? -ne 0 -o -z "${address}" ]; then
 110         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge-MAC from xenstore"
 111         exit 1
 112     fi
 113     local bridge=$(xenstore-read "${PRIVATE}/bridge")
 114     if [ $? -ne 0 -o -z "${bridge}" ]; then
 115         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge from xenstore"
 116         exit 1
 117     fi
 118     logger -t scripts-vif "Adding ${dev} to ${bridge} with address ${address}"
 119
 120     ${IP} link set "${dev}" down                        || logger -t scripts-vif "Failed to ip link set ${dev} down"
 121     ${IP} link set "${dev}" arp off                     || logger -t scripts-vif "Failed to ip link set ${dev} arp off"
 122     ${IP} link set "${dev}" multicast off               || logger -t scripts-vif "Failed to ip link set ${dev} multicast off"
 123     ${IP} link set "${dev}" address "${address}"        || logger -t scripts-vif "Failed to ip link set ${dev} address ${address}"
 124     ${IP} addr flush "${dev}"                           || logger -t scripts-vif "Failed to ip addr flush ${dev}"
 125
 126     case $NETWORK_MODE in
 127         bridge)
 128             ${BRCTL} setfd "${bridge}" 0                        || logger -t scripts-vif "Failed to brctl setfd ${bridge} 0"
 129             ${BRCTL} addif "${bridge}" "${dev}"                 || logger -t scripts-vif "Failed to brctl addif ${bridge} ${dev}"
 130             ;;
 131         vswitch)
 132             if [ "$TYPE" = "vif" ] ; then
 133                 local vif_details=$(handle_vswitch_vif_details)
 134             fi
 135
 136             $vsctl -- --if-exists del-port $dev -- add-port $bridge $dev $vif_details
 137             ;;
 138     esac
 139
 140     ${IP} link set "${dev}" up                          || logger -t scripts-vif "Failed to ip link set ${dev} up"
 141 }
 142
 143 remove_from_bridge()
 144 {
 145     case $NETWORK_MODE in
 146         bridge)
 147             # Nothing to do
 148             ;;
 149         vswitch)
 150             $vsctl del-port $bridge $dev
 151             ;;
 152     esac
 153 }
 154
 155 NETWORK_MODE=$(cat /etc/xensource/network.conf)
 156 ACTION=$1
 157
 158 # Older versions of XenServer do not pass in the type as an argument
 159 if [[ $# -lt 2 ]]; then
 160     TYPE=vif
 161 else
 162     TYPE=$2
 163 fi
 164
 165 case $NETWORK_MODE in
 166     bridge|vswitch) ;;
 167     *)
 168         logger -t scripts-vif "Unknown network mode $NETWORK_MODE"
 169         exit 1
 170         ;;
 171 esac
 172
 173 case ${TYPE} in
 174     vif)
 175         DOMID=`echo ${XENBUS_PATH} | cut -f 3 -d '/'`
 176         DEVID=`echo ${XENBUS_PATH} | cut -f 4 -d '/'`
 177         dev=vif${DOMID}.${DEVID}
 178         ;;
 179     tap)
 180         dev=$INTERFACE
 181         DOMID=`echo ${dev#tap} | cut -f 1 -d '.'`
 182         DEVID=`echo ${dev#tap} | cut -f 2 -d '.'`
 183         ;;
 184     *)
 185         logger -t scripts-vif "unknown interface type ${TYPE}"
 186         exit 1
 187         ;;
 188 esac
 189
 190 XAPI=/xapi/${DOMID}/hotplug/vif/${DEVID}
 191 HOTPLUG=/xapi/${DOMID}/hotplug/vif/${DEVID}
 192 PRIVATE=/xapi/${DOMID}/private/vif/${DEVID}
 193
 194 logger -t scripts-vif "Called as \"$@\" domid:$DOMID devid:$DEVID mode:$NETWORK_MODE"
 195 case "${ACTION}" in
 196 online)
 197         if [ "${TYPE}" = "vif" ] ; then
 198             handle_ethtool rx
 199             handle_ethtool tx
 200             handle_ethtool sg
 201             handle_ethtool tso
 202             handle_ethtool ufo
 203             handle_ethtool gso
 204
 205             handle_mtu
 206             add_to_bridge
 207             handle_promiscuous
 208
 209             xenstore-write "${HOTPLUG}/vif" "${dev}"
 210             xenstore-write "${HOTPLUG}/hotplug" "online"
 211
 212             # xs-xen.pq.hq:91e986b8e49f netback-wait-for-hotplug
 213             xenstore-write "/local/domain/0/backend/vif/${DOMID}/${DEVID}/hotplug-status" "connected"
 214         fi
 215         ;;
 216
 217 add)
 218         if [ "${TYPE}" = "tap" ] ; then
 219             add_to_bridge
 220         fi
 221         ;;
 222
 223 remove)
 224         if [ "${TYPE}" = "vif" ] ;then
 225             xenstore-rm "${HOTPLUG}/hotplug"
 226         fi
 227         logger -t scripts-vif "${dev} has been removed"
 228         remove_from_bridge
 229         ;;
 230 esac