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 handle_promiscuous()
  29 {
  30     local arg=$(xenstore-read "${PRIVATE}/other-config/promiscuous" 2>/dev/null)
  31     if [ $? -eq 0 -a -n "${arg}" ] ; then
  32         case $NETWORK_MODE in
  33             bridge)
  34                 case "${arg}" in
  35                     true|on) echo 1 > /sys/class/net/${dev}/brport/promisc ;;
  36                     *) echo 0 > /sys/class/net/${dev}/brport/promisc ;;
  37                 esac
  38                 ;;
  39             openvswitch)
  40                 logger -t script-vif "${dev}: Promiscuous ports are not supported via Open vSwitch."
  41                 ;;
  42         esac
  43     fi
  44 }
  45
  46 handle_ethtool()
  47 {
  48     local opt=$1
  49     local arg=$(xenstore-read "${PRIVATE}/other-config/ethtool-${opt}" 2>/dev/null)
  50     if [ $? -eq 0 -a -n "${arg}" ] ; then
  51         case "${arg}" in
  52             true|on)   /sbin/ethtool -K "${dev}" "${opt}" on ;;
  53             false|off) /sbin/ethtool -K "${dev}" "${opt}" off ;;
  54             *) logger -t scripts-vif "Unknown ethtool argument ${opt}=${arg} on ${dev}/${VIFUUID}" ;;
  55         esac
  56     fi
  57 }
  58
  59 handle_mtu()
  60 {
  61     local mtu=$(xenstore-read "${PRIVATE}/MTU" 2>/dev/null)
  62     if [ $? -eq 0 -a -n "${mtu}" ]; then
  63         logger -t scripts-vif "Setting ${dev} MTU ${mtu}"
  64         ${IP} link set "${dev}" mtu ${mtu} || logger -t scripts-vif "Failed to ip link set ${dev} mtu ${mtu}. Error code $?"
  65     fi
  66 }
  67
  68 set_vif_external_id()
  69 {
  70     local key=$1
  71     local value=$2
  72
  73     logger -t scripts-vif "vif${DOMID}.${DEVID} external-ids:\"${key}\"=\"${value}\""
  74
  75     echo "-- set interface vif${DOMID}.${DEVID} external-ids:\"${key}\"=\"${value}\""
  76 }
  77
  78 handle_vswitch_vif_details()
  79 {
  80     local vm=$(xenstore-read "/local/domain/$DOMID/vm" 2>/dev/null)
  81     if [ $? -eq 0 -a -n "${vm}" ] ; then
  82         local vm_uuid=$(xenstore-read "$vm/uuid" 2>/dev/null)
  83     fi
  84     if [ -n "${vm_uuid}" ] ; then
  85         set_vif_external_id "xs-vm-uuid" "${vm_uuid}"
  86     fi
  87
  88     local vif_uuid=$(xenstore-read "${PRIVATE}/vif-uuid" 2>/dev/null)
  89     if [ -n "${vif_uuid}" ] ; then
  90         set_vif_external_id "xs-vif-uuid" "${vif_uuid}"
  91     fi
  92
  93     local vif_details=
  94     local net_uuid=$(xenstore-read "${PRIVATE}/network-uuid" 2>/dev/null)
  95     if [ -n "${net_uuid}" ] ; then
  96         set_vif_external_id "xs-network-uuid" "${net_uuid}"
  97     fi
  98     local address=$(xenstore-read "/local/domain/$DOMID/device/vif/$DEVID/mac" 2>/dev/null)
  99     if [ -n "${address}" ] ; then
 100         set_vif_external_id "attached-mac" "${address}"
 101     fi
 102 }
 103
 104 add_to_bridge()
 105 {
 106     local address=$(xenstore-read "${PRIVATE}/bridge-MAC")
 107     if [ $? -ne 0 -o -z "${address}" ]; then
 108         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge-MAC from xenstore"
 109         exit 1
 110     fi
 111     local bridge=$(xenstore-read "${PRIVATE}/bridge")
 112     if [ $? -ne 0 -o -z "${bridge}" ]; then
 113         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge from xenstore"
 114         exit 1
 115     fi
 116     logger -t scripts-vif "Adding ${dev} to ${bridge} with address ${address}"
 117
 118     ${IP} link set "${dev}" down                        || logger -t scripts-vif "Failed to ip link set ${dev} down"
 119     ${IP} link set "${dev}" arp off                     || logger -t scripts-vif "Failed to ip link set ${dev} arp off"
 120     ${IP} link set "${dev}" multicast off               || logger -t scripts-vif "Failed to ip link set ${dev} multicast off"
 121     ${IP} link set "${dev}" address "${address}"        || logger -t scripts-vif "Failed to ip link set ${dev} address ${address}"
 122     ${IP} addr flush "${dev}"                           || logger -t scripts-vif "Failed to ip addr flush ${dev}"
 123
 124     case $NETWORK_MODE in
 125     bridge)
 126         ${BRCTL} setfd "${bridge}" 0                    || logger -t scripts-vif "Failed to brctl setfd ${bridge} 0"
 127         ${BRCTL} addif "${bridge}" "${dev}"             || logger -t scripts-vif "Failed to brctl addif ${bridge} ${dev}"
 128         ;;
 129     openvswitch)
 130         if [ "$TYPE" = "vif" ] ; then
 131             local vif_details=$(handle_vswitch_vif_details $bridge)
 132         fi
 133
 134         $vsctl --timeout=30 -- --if-exists del-port $dev -- add-port $bridge $dev $vif_details
 135         ;;
 136     esac
 137
 138     ${IP} link set "${dev}" up                          || logger -t scripts-vif "Failed to ip link set ${dev} up"
 139 }
 140
 141 remove_from_bridge()
 142 {
 143     case $NETWORK_MODE in
 144     bridge)
 145         # Nothing to do
 146         ;;
 147     openvswitch)
 148         $vsctl --timeout=30 -- del-port $dev
 149         ;;
 150     esac
 151 }
 152
 153 call_hook_script() {
 154     local domid=$1
 155     local action=$2
 156     # Call the VIF hotplug hook if present
 157     if [ -x /etc/xapi.d/vif-hotplug ]; then
 158         local vm=$(xenstore-read "/local/domain/$domid/vm" 2>/dev/null)
 159         if [ $? -eq 0 -a -n "${vm}" ] ; then
 160             local vm_uuid=$(xenstore-read "$vm/uuid" 2>/dev/null)
 161         fi
 162         if [ -n "${vm_uuid}" ] ; then
 163             logger -t scripts-vif "VM UUID ${vm_uuid}"
 164         fi
 165
 166         local vif_uuid=$(xenstore-read "${PRIVATE}/vif-uuid" 2>/dev/null)
 167         if [ -n "${vif_uuid}" ] ; then
 168             logger -t scripts-vif "VIF UUID ${vif_uuid}"
 169         fi
 170         if [ -n "${vif_uuid}" -a -n "${vm_uuid}" ] ; then
 171             logger -t scripts-vif "Calling VIF hotplug hook for VM ${vm_uuid}, VIF ${vif_uuid}"
 172             /etc/xapi.d/vif-hotplug -action "${action}" -vifuuid "${vif_uuid}" -vmuuid "${vm_uuid}"
 173         fi
 174     fi
 175 }
 176
 177 NETWORK_MODE=$(cat /etc/xensource/network.conf)
 178 ACTION=$1
 179
 180 # Older versions of XenServer do not pass in the type as an argument
 181 if [[ $# -lt 2 ]]; then
 182     TYPE=vif
 183 else
 184     TYPE=$2
 185 fi
 186
 187 case $NETWORK_MODE in
 188     bridge|openvswitch) ;;
 189     vswitch) NETWORK_MODE=openvswitch ;;
 190     *)
 191         logger -t scripts-vif "Unknown network mode $NETWORK_MODE"
 192         exit 1
 193         ;;
 194 esac
 195
 196 case ${TYPE} in
 197     vif)
 198         if [ -z ${XENBUS_PATH} ]; then
 199             DOMID=$3
 200             DEVID=$4
 201         else
 202             DOMID=`echo ${XENBUS_PATH} | cut -f 3 -d '/'`
 203             DEVID=`echo ${XENBUS_PATH} | cut -f 4 -d '/'`
 204         fi
 205         dev=vif${DOMID}.${DEVID}
 206         ;;
 207     tap)
 208         dev=$INTERFACE
 209         DOMID=`echo ${dev#tap} | cut -f 1 -d '.'`
 210         DEVID=`echo ${dev#tap} | cut -f 2 -d '.'`
 211         ;;
 212     *)
 213         logger -t scripts-vif "unknown interface type ${TYPE}"
 214         exit 1
 215         ;;
 216 esac
 217
 218 XAPI=/xapi/${DOMID}/hotplug/vif/${DEVID}
 219 HOTPLUG=/xapi/${DOMID}/hotplug/vif/${DEVID}
 220 PRIVATE=/xapi/${DOMID}/private/vif/${DEVID}
 221
 222 logger -t scripts-vif "Called as \"$@\" domid:$DOMID devid:$DEVID mode:$NETWORK_MODE"
 223 case "${ACTION}" in
 224 online)
 225     if [ "${TYPE}" = "vif" ] ; then
 226         handle_ethtool rx
 227         handle_ethtool tx
 228         handle_ethtool sg
 229         handle_ethtool tso
 230         handle_ethtool ufo
 231         handle_ethtool gso
 232
 233         handle_mtu
 234         add_to_bridge
 235         handle_promiscuous
 236
 237         xenstore-write "${HOTPLUG}/vif" "${dev}"
 238         xenstore-write "${HOTPLUG}/hotplug" "online"
 239
 240         # xs-xen.pq.hq:91e986b8e49f netback-wait-for-hotplug
 241         xenstore-write "/local/domain/0/backend/vif/${DOMID}/${DEVID}/hotplug-status" "connected"
 242         call_hook_script $DOMID "${ACTION}"
 243     fi
 244     ;;
 245
 246 add)
 247     if [ "${TYPE}" = "tap" ] ; then
 248         add_to_bridge
 249     fi
 250     ;;
 251
 252 remove)
 253     if [ "${TYPE}" = "vif" ] ;then
 254         xenstore-rm "${HOTPLUG}/hotplug"
 255         call_hook_script $DOMID "${ACTION}"
 256     fi
 257     logger -t scripts-vif "${dev} has been removed"
 258     remove_from_bridge
 259     ;;
 260
 261 move)
 262     if [ "${TYPE}" = "vif" ] ;then
 263         add_to_bridge
 264     fi
 265 esac