xenserver/etc_xensource_scripts_vif

   1 #!/bin/sh
   2
   3 # Copyright (C) 2008,2009 Citrix Systems, Inc. All rights reserved.
   4 # Copyright (C) 2009 Nicira Networks, Inc.
   5
   6 # CA-23900: Warning: when VIFs are added to windows guests with PV drivers the backend vif device is registered,
   7 # unregistered and then registered again. This causes the udev event to fire twice and this script runs twice.
   8 # Since the first invocation of the script races with the device unregistration, spurious errors are possible
   9 # which will be logged but are safe to ignore since the second script invocation should complete the operation.
  10 # Note that each script invocation is run synchronously from udev and so the scripts don't race with each other.
  11
  12 # Keep other-config/ keys in sync with device.ml:vif_udev_keys
  13
  14 cfg_mod="/usr/bin/ovs-cfg-mod"
  15 vsctl="/usr/bin/ovs-vsctl"
  16 dump_vif_details="/usr/share/vswitch/scripts/dump-vif-details"
  17 service="/sbin/service"
  18 IP="/sbin/ip"
  19
  20 handle_promiscuous()
  21 {
  22     local arg=$(xenstore-read "${PRIVATE}/other-config/promiscuous" 2>/dev/null)
  23     if [ $? -eq 0 -a -n "${arg}" ] ; then
  24         case "${arg}" in
  25             true|on) logger -t script-vif "${dev}: Promiscuous ports are not supported via vSwitch." ;;
  26             *) ;;
  27         esac
  28     fi
  29 }
  30
  31 handle_ethtool()
  32 {
  33     local opt=$1
  34     local arg=$(xenstore-read "${PRIVATE}/other-config/ethtool-${opt}" 2>/dev/null)
  35     if [ $? -eq 0 -a -n "${arg}" ] ; then
  36         case "${arg}" in
  37             true|on)   /sbin/ethtool -K "${dev}" "${opt}" on ;;
  38             false|off) /sbin/ethtool -K "${dev}" "${opt}" off ;;
  39             *) logger -t scripts-vif "Unknown ethtool argument ${opt}=${arg} on ${dev}/${VIFUUID}" ;;
  40         esac
  41     fi
  42 }
  43
  44 handle_mtu()
  45 {
  46     local mtu=$(xenstore-read "${PRIVATE}/MTU" 2>/dev/null)
  47     if [ $? -eq 0 -a -n "${mtu}" ]; then
  48         echo "${mtu}" > /sys/class/net/${dev}/mtu
  49     fi
  50 }
  51
  52 handle_vif_details()
  53 {
  54     local vif_details=
  55     local net_uuid=$(xenstore-read "${PRIVATE}/network-uuid" 2>/dev/null)
  56     if [ -n "${net_uuid}" ] ; then
  57         vif_details="$vif_details --add=port.${dev}.net-uuid=${net_uuid}"
  58     fi
  59
  60     local address=$(xenstore-read "/local/domain/$DOMID/device/vif/$DEVID/mac" 2>/dev/null)
  61     if [ -n "${address}" ] ; then
  62         vif_details="$vif_details --add=port.${dev}.vif-mac=${address}"
  63     fi
  64
  65     local vif_uuid=$(xenstore-read "${PRIVATE}/vif-uuid" 2>/dev/null)
  66     if [ -n "${vif_uuid}" ] ; then
  67         vif_details="$vif_details --add=port.${dev}.vif-uuid=${vif_uuid}"
  68     fi
  69
  70     local vm=$(xenstore-read "/local/domain/$DOMID/vm" 2>/dev/null)
  71     if [ $? -eq 0 -a -n "${vm}" ] ; then
  72         local vm_uuid=$(xenstore-read "$vm/uuid" 2>/dev/null)
  73     fi
  74     if [ -n "${vm_uuid}" ] ; then
  75         vif_details="$vif_details --add=port.${dev}.vm-uuid=${vm_uuid}"
  76     fi
  77     echo ${vif_details}
  78 }
  79
  80 add_to_bridge()
  81 {
  82     local address=$(xenstore-read "${PRIVATE}/bridge-MAC")
  83     if [ $? -ne 0 -o -z "${address}" ]; then
  84         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge-MAC from xenstore"
  85         exit 1
  86     fi
  87     local bridge=$(xenstore-read "${PRIVATE}/bridge")
  88     if [ $? -ne 0 -o -z "${bridge}" ]; then
  89         logger -t scripts-vif "Failed to read ${PRIVATE}/bridge from xenstore"
  90         exit 1
  91     fi
  92     logger -t scripts-vif "Adding ${dev} to ${bridge} with address ${address}"
  93
  94     local VLAN_ID=$($vsctl br-to-vlan $bridge)
  95     local vid=
  96     if [ "$VLAN_ID" -ne 0 ] ; then
  97         bridge=$($vsctl br-to-parent $bridge)
  98         vid="--add=vlan.${dev}.tag=${VLAN_ID}"
  99     fi
 100
 101     if [ "$type" = "vif" ] ; then
 102         local vif_details=$(handle_vif_details)
 103     fi
 104
 105     ${IP} link set "${dev}" down                        || logger -t scripts-vif "Failed to ip link set ${dev} down"
 106     ${IP} link set "${dev}" arp off                     || logger -t scripts-vif "Failed to ip link set ${dev} arp off"
 107     ${IP} link set "${dev}" multicast off               || logger -t scripts-vif "Failed to ip link set ${dev} multicast off"
 108     ${IP} link set "${dev}" address "${address}"        || logger -t scripts-vif "Failed to ip link set ${dev} address ${address}"
 109     ${IP} addr flush "${dev}"                           || logger -t scripts-vif "Failed to ip addr flush ${dev}"
 110
 111     $cfg_mod -F /etc/ovs-vswitchd.conf \
 112         --del-match="bridge.*.port=${dev}" \
 113         --del-match="vlan.${dev}.[!0-9]*" \
 114         --del-match="port.${dev}.[!0-9]*" \
 115         --add="bridge.$bridge.port=${dev}" \
 116         $vid $vif_details -c
 117     $service vswitch reload
 118
 119     ${IP} link set "${dev}" up                          || logger -t scripts-vif "Failed to ip link set ${dev} up"
 120 }
 121
 122 type=$2
 123
 124 case ${type} in
 125     vif)
 126         DOMID=`echo ${XENBUS_PATH} | cut -f 3 -d '/'`
 127         DEVID=`echo ${XENBUS_PATH} | cut -f 4 -d '/'`
 128         dev=vif${DOMID}.${DEVID}
 129         ;;
 130     tap)
 131         dev=$INTERFACE
 132         DOMID=`echo ${dev#tap} | cut -f 1 -d '.'`
 133         DEVID=`echo ${dev#tap} | cut -f 2 -d '.'`
 134         ;;
 135     *)
 136         logger -t scripts-vif "unknown interface type ${type}"
 137         exit 1
 138         ;;
 139 esac
 140
 141 XAPI=/xapi/${DOMID}/hotplug/vif/${DEVID}
 142 HOTPLUG=/xapi/${DOMID}/hotplug/vif/${DEVID}
 143 PRIVATE=/xapi/${DOMID}/private/vif/${DEVID}
 144
 145 echo Called as "$@" "$DOMID" "$DEVID" | logger -t scripts-vif
 146 case "$1" in
 147 online)
 148         if [ "${type}" = "vif" ] ; then
 149             handle_ethtool rx
 150             handle_ethtool tx
 151             handle_ethtool sg
 152             handle_ethtool tso
 153             handle_ethtool ufo
 154             handle_ethtool gso
 155
 156             handle_mtu
 157             add_to_bridge
 158             handle_promiscuous
 159
 160             xenstore-write "${HOTPLUG}/vif" "${dev}"
 161             xenstore-write "${HOTPLUG}/hotplug" "online"
 162
 163             # xs-xen.pq.hq:91e986b8e49f netback-wait-for-hotplug
 164             xenstore-write "/local/domain/0/backend/vif/${DOMID}/${DEVID}/hotplug-status" "connected"
 165         fi
 166         ;;
 167
 168 add)
 169         if [ "${type}" = "tap" ] ; then
 170             add_to_bridge
 171         fi
 172         ;;
 173
 174 remove)
 175         if [ "${type}" = "vif" ] ;then
 176             xenstore-rm "${HOTPLUG}/hotplug"
 177         fi
 178         logger -t scripts-vif "${dev} has been removed"
 179         $cfg_mod -vANY:console:emer -F /etc/ovs-vswitchd.conf \
 180             --del-match="bridge.*.port=${dev}" \
 181             --del-match="vlan.${dev}.[!0-9]*" \
 182             --del-match="port.${dev}.[!0-9]*" -c
 183         $service vswitch reload
 184         ;;
 185 esac