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         echo "${mtu}" > /sys/class/net/${dev}/mtu
  65     fi
  66 }
  67
  68 add_to_bridge()
  69 {
  70     local address=$(xenstore-read "${PRIVATE}/bridge-MAC")
  71     if [ $? -ne 0 -o -z "${address}" ]; then
  72         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge-MAC from xenstore"
  73         exit 1
  74     fi
  75     local bridge=$(xenstore-read "${PRIVATE}/bridge")
  76     if [ $? -ne 0 -o -z "${bridge}" ]; then
  77         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge from xenstore"
  78         exit 1
  79     fi
  80     logger -t scripts-vif "Adding ${dev} to ${bridge} with address ${address}"
  81
  82     ${IP} link set "${dev}" down                        || logger -t scripts-vif "Failed to ip link set ${dev} down"
  83     ${IP} link set "${dev}" arp off                     || logger -t scripts-vif "Failed to ip link set ${dev} arp off"
  84     ${IP} link set "${dev}" multicast off               || logger -t scripts-vif "Failed to ip link set ${dev} multicast off"
  85     ${IP} link set "${dev}" address "${address}"        || logger -t scripts-vif "Failed to ip link set ${dev} address ${address}"
  86     ${IP} addr flush "${dev}"                           || logger -t scripts-vif "Failed to ip addr flush ${dev}"
  87
  88     case $NETWORK_MODE in
  89         bridge)
  90             ${BRCTL} setfd "${bridge}" 0                        || logger -t scripts-vif "Failed to brctl setfd ${bridge} 0"
  91             ${BRCTL} addif "${bridge}" "${dev}"                 || logger -t scripts-vif "Failed to brctl addif ${bridge} ${dev}"
  92             ;;
  93         vswitch)
  94                 local vif_details=$($dump_vif_details $DOMID $DEVID)
  95                 if [ $? -ne 0 -o -z "${vif_details}" ]; then
  96                         logger -t scripts-vif "Failed to retrieve vif details for vswitch"
  97                 fi
  98
  99                 $vsctl add-port $bridge $dev $vif_details
 100             ;;
 101     esac
 102
 103     ${IP} link set "${dev}" up                          || logger -t scripts-vif "Failed to ip link set ${dev} up"
 104 }
 105
 106 remove_from_bridge()
 107 {
 108     case $NETWORK_MODE in
 109         bridge)
 110             # Nothing to do
 111             ;;
 112         vswitch)
 113         $vsctl del-port $bridge $dev
 114             ;;
 115     esac
 116 }
 117
 118 NETWORK_MODE=$(cat /etc/xensource/network.conf)
 119 ACTION=$1
 120 TYPE=$2
 121
 122 case $NETWORK_MODE in
 123     bridge|vswitch) ;;
 124     *)
 125         logger -t scripts-vif "Unknown network mode $NETWORK_MODE"
 126         exit 1
 127         ;;
 128 esac
 129
 130 case ${TYPE} in
 131     vif)
 132         DOMID=`echo ${XENBUS_PATH} | cut -f 3 -d '/'`
 133         DEVID=`echo ${XENBUS_PATH} | cut -f 4 -d '/'`
 134         dev=vif${DOMID}.${DEVID}
 135         ;;
 136     tap)
 137         dev=$INTERFACE
 138         DOMID=`echo ${dev#tap} | cut -f 1 -d '.'`
 139         DEVID=`echo ${dev#tap} | cut -f 2 -d '.'`
 140         ;;
 141     *)
 142         logger -t scripts-vif "unknown interface type ${TYPE}"
 143         exit 1
 144         ;;
 145 esac
 146
 147 XAPI=/xapi/${DOMID}/hotplug/vif/${DEVID}
 148 HOTPLUG=/xapi/${DOMID}/hotplug/vif/${DEVID}
 149 PRIVATE=/xapi/${DOMID}/private/vif/${DEVID}
 150
 151 logger -t scripts-vif "Called as \"$@\" domid:$DOMID devid:$DEVID mode:$NETWORK_MODE"
 152 case "${ACTION}" in
 153 online)
 154         if [ "${TYPE}" = "vif" ] ; then
 155             handle_ethtool rx
 156             handle_ethtool tx
 157             handle_ethtool sg
 158             handle_ethtool tso
 159             handle_ethtool ufo
 160             handle_ethtool gso
 161
 162             handle_mtu
 163             add_to_bridge
 164             handle_promiscuous
 165
 166             xenstore-write "${HOTPLUG}/vif" "${dev}"
 167             xenstore-write "${HOTPLUG}/hotplug" "online"
 168
 169             # xs-xen.pq.hq:91e986b8e49f netback-wait-for-hotplug
 170             xenstore-write "/local/domain/0/backend/vif/${DOMID}/${DEVID}/hotplug-status" "connected"
 171         fi
 172         ;;
 173
 174 add)
 175         if [ "${TYPE}" = "tap" ] ; then
 176             add_to_bridge
 177         fi
 178         ;;
 179
 180 remove)
 181         if [ "${TYPE}" = "vif" ] ;then
 182             xenstore-rm "${HOTPLUG}/hotplug"
 183         fi
 184         logger -t scripts-vif "${dev} has been removed"
 185         remove_from_bridge
 186         ;;
 187 esac