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
  28 # XAPI before build 29381 (approximately) did not provide some of the
  29 # data in XenStore that we rely on.
  30 . /etc/xensource-inventory
  31 if test "$PRODUCT_VERSION" = "5.5.0" || test "${BUILD_NUMBER%p}" -le 26131
  32 then
  33     xs550=true
  34 else
  35     xs550=false
  36 fi
  37
  38 handle_promiscuous()
  39 {
  40     local arg=$(xenstore-read "${PRIVATE}/other-config/promiscuous" 2>/dev/null)
  41     if [ $? -eq 0 -a -n "${arg}" ] ; then
  42         case $NETWORK_MODE in
  43             bridge)
  44                 case "${arg}" in
  45                     true|on) echo 1 > /sys/class/net/${dev}/brport/promisc ;;
  46                     *) echo 0 > /sys/class/net/${dev}/brport/promisc ;;
  47                 esac
  48                 ;;
  49             vswitch)
  50                 logger -t script-vif "${dev}: Promiscuous ports are not supported via vSwitch."
  51                 ;;
  52         esac
  53     fi
  54 }
  55
  56 handle_ethtool()
  57 {
  58     local opt=$1
  59     local arg=$(xenstore-read "${PRIVATE}/other-config/ethtool-${opt}" 2>/dev/null)
  60     if [ $? -eq 0 -a -n "${arg}" ] ; then
  61         case "${arg}" in
  62             true|on)   /sbin/ethtool -K "${dev}" "${opt}" on ;;
  63             false|off) /sbin/ethtool -K "${dev}" "${opt}" off ;;
  64             *) logger -t scripts-vif "Unknown ethtool argument ${opt}=${arg} on ${dev}/${VIFUUID}" ;;
  65         esac
  66     fi
  67 }
  68
  69 handle_mtu()
  70 {
  71     local mtu=$(xenstore-read "${PRIVATE}/MTU" 2>/dev/null)
  72     if [ $? -eq 0 -a -n "${mtu}" ]; then
  73         logger -t scripts-vif "Setting ${dev} MTU ${mtu}"
  74         ${IP} link set "${dev}" mtu ${mtu} || logger -t scripts-vif "Failed to ip link set ${dev} mtu ${mtu}. Error code $?"
  75     fi
  76 }
  77
  78 set_vif_external_id()
  79 {
  80     local key=$1
  81     local value=$2
  82
  83     logger -t scripts-vif "vif${DOMID}.${DEVID} external-ids:\"${key}\"=\"${value}\""
  84
  85     echo "-- set interface vif${DOMID}.${DEVID} external-ids:\"${key}\"=\"${value}\""
  86 }
  87
  88 handle_vswitch_vif_details()
  89 {
  90     local vm=$(xenstore-read "/local/domain/$DOMID/vm" 2>/dev/null)
  91     if [ $? -eq 0 -a -n "${vm}" ] ; then
  92         local vm_uuid=$(xenstore-read "$vm/uuid" 2>/dev/null)
  93     fi
  94     if [ -n "${vm_uuid}" ] ; then
  95         set_vif_external_id "vm-uuid" "${vm_uuid}"
  96     fi
  97
  98     local vif_uuid=$(xenstore-read "${PRIVATE}/vif-uuid" 2>/dev/null)
  99     if $xs550 && [ -z "${vif_uuid}" ] && [ -n "${vm_uuid}" ]; then
 100         vif_uuid=$(xe vif-list --minimal vm-uuid="${vm_uuid}" device=$DEVID)
 101     fi
 102     if [ -n "${vif_uuid}" ] ; then
 103         set_vif_external_id "vif-uuid" "${vif_uuid}"
 104     fi
 105
 106     local vif_details=
 107     local net_uuid=$(xenstore-read "${PRIVATE}/network-uuid" 2>/dev/null)
 108     if $xs550 && [ -z "${net_uuid}" ] && [ -n "${vif_uuid}" ]; then
 109         net_uuid=$(xe vif-param-get uuid="${vif_uuid}" param-name=network-uuid)
 110     fi
 111     if [ -n "${net_uuid}" ] ; then
 112         set_vif_external_id "network-uuid" "${net_uuid}"
 113     fi
 114
 115     local address=$(xenstore-read "/local/domain/$DOMID/device/vif/$DEVID/mac" 2>/dev/null)
 116     if [ -n "${address}" ] ; then
 117         set_vif_external_id "vif-mac" "${address}"
 118     fi
 119 }
 120
 121 xs550_set_internal_network_uuid()
 122 {
 123     if $xs550; then
 124         # vNetManager needs to know the network UUID(s) associated with each
 125         # datapath.  Normally interface-reconfigure adds them, but XAPI does
 126         # not use interface-reconfigure for internal networks. Instead, XAPI
 127         # calls the addbr ioctl internally, so we have to do it here instead
 128         # for internal networks.  This is only acceptable because xapi is lazy
 129         # about creating internal networks: it only creates one just before it
 130         # adds the first vif to it.  There may still be a brief delay between
 131         # the initial ovs-vswitchd connection to vNetManager and setting this
 132         # configuration variable, but vNetManager can tolerate that.
 133         local bridge=$1
 134         local net_uuid=$(xenstore-read "${PRIVATE}/network-uuid" 2>/dev/null)
 135         if [ -n "${net_uuid}" ] ; then
 136             logger -t scripts-vif "${bridge} network-uuids ${net_uuid}"
 137             echo "-- br-set-external-id $bridge network-uuids ${net_uuid}"
 138         fi
 139     fi
 140 }
 141
 142 add_to_bridge()
 143 {
 144     local address=$(xenstore-read "${PRIVATE}/bridge-MAC")
 145     if [ $? -ne 0 -o -z "${address}" ]; then
 146         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge-MAC from xenstore"
 147         exit 1
 148     fi
 149     local bridge=$(xenstore-read "${PRIVATE}/bridge")
 150     if [ $? -ne 0 -o -z "${bridge}" ]; then
 151         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge from xenstore"
 152         exit 1
 153     fi
 154     logger -t scripts-vif "Adding ${dev} to ${bridge} with address ${address}"
 155
 156     ${IP} link set "${dev}" down                        || logger -t scripts-vif "Failed to ip link set ${dev} down"
 157     ${IP} link set "${dev}" arp off                     || logger -t scripts-vif "Failed to ip link set ${dev} arp off"
 158     ${IP} link set "${dev}" multicast off               || logger -t scripts-vif "Failed to ip link set ${dev} multicast off"
 159     ${IP} link set "${dev}" address "${address}"        || logger -t scripts-vif "Failed to ip link set ${dev} address ${address}"
 160     ${IP} addr flush "${dev}"                           || logger -t scripts-vif "Failed to ip addr flush ${dev}"
 161
 162     case $NETWORK_MODE in
 163         bridge)
 164             ${BRCTL} setfd "${bridge}" 0                        || logger -t scripts-vif "Failed to brctl setfd ${bridge} 0"
 165             ${BRCTL} addif "${bridge}" "${dev}"                 || logger -t scripts-vif "Failed to brctl addif ${bridge} ${dev}"
 166             ;;
 167         vswitch)
 168             if [ "$TYPE" = "vif" ] ; then
 169                 local vif_details=$(handle_vswitch_vif_details)
 170             fi
 171
 172             $vsctl -- --if-exists del-port $dev -- add-port $bridge $dev $vif_details $(xs550_set_internal_network_uuid $bridge)
 173             ;;
 174     esac
 175
 176     ${IP} link set "${dev}" up                          || logger -t scripts-vif "Failed to ip link set ${dev} up"
 177 }
 178
 179 remove_from_bridge()
 180 {
 181     case $NETWORK_MODE in
 182         bridge)
 183             # Nothing to do
 184             ;;
 185         vswitch)
 186             # If ovs-brcompatd is running, it might already have deleted the
 187             # port.  Use --if-exists to suppress the error that would otherwise
 188             # arise in that case.
 189             $vsctl -- --if-exists del-port $dev
 190             ;;
 191     esac
 192 }
 193
 194 NETWORK_MODE=$(cat /etc/xensource/network.conf)
 195 ACTION=$1
 196
 197 # Older versions of XenServer do not pass in the type as an argument
 198 if [[ $# -lt 2 ]]; then
 199     TYPE=vif
 200 else
 201     TYPE=$2
 202 fi
 203
 204 case $NETWORK_MODE in
 205     bridge|vswitch) ;;
 206     *)
 207         logger -t scripts-vif "Unknown network mode $NETWORK_MODE"
 208         exit 1
 209         ;;
 210 esac
 211
 212 case ${TYPE} in
 213     vif)
 214         DOMID=`echo ${XENBUS_PATH} | cut -f 3 -d '/'`
 215         DEVID=`echo ${XENBUS_PATH} | cut -f 4 -d '/'`
 216         dev=vif${DOMID}.${DEVID}
 217         ;;
 218     tap)
 219         dev=$INTERFACE
 220         DOMID=`echo ${dev#tap} | cut -f 1 -d '.'`
 221         DEVID=`echo ${dev#tap} | cut -f 2 -d '.'`
 222         ;;
 223     *)
 224         logger -t scripts-vif "unknown interface type ${TYPE}"
 225         exit 1
 226         ;;
 227 esac
 228
 229 XAPI=/xapi/${DOMID}/hotplug/vif/${DEVID}
 230 HOTPLUG=/xapi/${DOMID}/hotplug/vif/${DEVID}
 231 PRIVATE=/xapi/${DOMID}/private/vif/${DEVID}
 232
 233 logger -t scripts-vif "Called as \"$@\" domid:$DOMID devid:$DEVID mode:$NETWORK_MODE"
 234 case "${ACTION}" in
 235 online)
 236         if [ "${TYPE}" = "vif" ] ; then
 237             handle_ethtool rx
 238             handle_ethtool tx
 239             handle_ethtool sg
 240             handle_ethtool tso
 241             handle_ethtool ufo
 242             handle_ethtool gso
 243
 244             handle_mtu
 245             add_to_bridge
 246             handle_promiscuous
 247
 248             xenstore-write "${HOTPLUG}/vif" "${dev}"
 249             xenstore-write "${HOTPLUG}/hotplug" "online"
 250
 251             # xs-xen.pq.hq:91e986b8e49f netback-wait-for-hotplug
 252             xenstore-write "/local/domain/0/backend/vif/${DOMID}/${DEVID}/hotplug-status" "connected"
 253         fi
 254         ;;
 255
 256 add)
 257         if [ "${TYPE}" = "tap" ] ; then
 258             add_to_bridge
 259         fi
 260         ;;
 261
 262 remove)
 263         if [ "${TYPE}" = "vif" ] ;then
 264             xenstore-rm "${HOTPLUG}/hotplug"
 265         fi
 266         logger -t scripts-vif "${dev} has been removed"
 267         remove_from_bridge
 268         ;;
 269 esac