#!/bin/sh # Copyright (C) 2009 Citrix Systems Inc. # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. # Script to write information about the guest to XenStore. # # Information collected (if --memory NOT passed in): # - Distribution name # - Distribution version (major and minor) # - Kernel version (uname) # - IP addresses (IPv4 & IPv6) for each Ethernet interface # # Additional information collected (if --memory IS passed in): # - memtotal # - memfree # # Memory stats are separated out because they change all the time # and so we may not want to update them as frequently LANG="C" export LANG XE_LINUX_DISTRIBUTION_CACHE=/var/cache/xe-linux-distribution XS_CACHE=/var/cache/xenstore IPADDR_RE="\([[:digit:]]\{1,3\}\.\)\{3\}[[:digit:]]\{1,3\}" IPADDR6_RE="[[:xdigit:]:.]*" export PATH=/usr/sbin:/usr/bin:/sbin:/bin XENSTORE=${XENSTORE:-xenstore} XENSTORE_UPDATED=0 # Force to use xenbus communication mode export XS_OPEN_XENBUSONLY=yes # parse command line opts MEMORY_MODE=0 # do not update memory stats while [ $# -ge 1 ] ; do if [ "$1" = "--memory" ] ; then MEMORY_MODE=1 # update only memory stats fi shift done xenstore_write_cached() { key="$1" newval="$2" cache=$XS_CACHE/$key if [ -f $cache ] ; then # cache exists oldval=$(cat "$cache") if [ "$oldval" = "$newval" ] ; then # value unchanged return 0 fi else # cache does not exist if [ -e $cache ] ; then # something (directory?) in its way rm -rf $cache fi fi # try to write and update cache if successful if $XENSTORE-write "$key" "$newval" ; then mkdir -p $(dirname "$cache") echo -n "$newval" > "$cache" XENSTORE_UPDATED=1 return 0 fi return 1 } # If we detect a domain change then delete our cache and force a refresh domid=$(xenstore-read "domid") cache=$XS_CACHE/unique-domain-id newval=$(xenstore-read "/local/domain/${domid}/unique-domain-id") if [ -e $cache ]; then oldval=$(cat "$cache") if [ "$oldval" != "$newval" ]; then # domain changed rm -rf $XS_CACHE fi fi mkdir -p $XS_CACHE echo -n "$newval" > "$cache" xenstore_rm_cached() { key="$1" cache=$XS_CACHE/$key if [ ! -e $cache ] ; then return 1 fi # try to write and update cache if successful if $XENSTORE-rm "$key" ; then rm -rf "$cache" XENSTORE_UPDATED=1 return 0 fi return 1 } xenstore_list_interfaces_cached() { topdir=$XS_CACHE/attr if [ -d $topdir ] ; then cd $topdir for dir in * ; do [ -f $dir/ip ] && echo $dir done fi } if [ $MEMORY_MODE -eq 1 ] ; then # Update the memory information eval $(cat /proc/meminfo | \ sed -n -e 's/MemTotal\: *\([0-9]*\)[^$]*/memtotal=\1/gp;' \ -e 's/MemFree\: *\([0-9]*\)[^$]*/memfree=\1/gp;') xenstore_write_cached "data/meminfo_total" "${memtotal}" xenstore_write_cached "data/meminfo_free" "${memfree}" fi # e.g. # $ ip addr show # 1: lo: mtu 16436 qdisc noqueue # link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 # inet 127.0.0.1/8 scope host lo # inet6 ::1/128 scope host # valid_lft forever preferred_lft forever # 2: eth0: mtu 1500 qdisc pfifo_fast qlen 1000 # link/ether 00:13:20:95:e8:74 brd ff:ff:ff:ff:ff:ff # inet 172.31.0.57/20 brd 172.31.15.255 scope global eth0 # inet6 fe80::213:20ff:fe95:e874/64 scope link # valid_lft forever preferred_lft forever # 3: sit0: mtu 1480 qdisc noop # link/sit 0.0.0.0 brd 0.0.0.0 #eval $(ip addr show | \ # sed -n -e 's/^[[:digit:]]*: \([a-z0-9]*\): .*/ifs="\$ifs \1"; current="\1"; /gp;' \ # -e 's/^[[:space:]]\{4\}inet \('${IPADDR_RE}'\)\/.*/eval inet_\${current}="\1"; /gp;') # e.g. # eth0 Link encap:Ethernet HWaddr 00:13:20:95:E8:74 # inet addr:172.31.0.57 Bcast:172.31.15.255 Mask:255.255.240.0 # inet6 addr: fe80::213:20ff:fe95:e874/64 Scope:Link # UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 # RX packets:98001128 errors:0 dropped:0 overruns:0 frame:0 # TX packets:87728920 errors:0 dropped:0 overruns:0 carrier:0 # collisions:0 txqueuelen:1000 # RX bytes:35864034092 (33.4 GiB) TX bytes:27544025180 (25.6 GiB) # Interrupt:177 # # lo Link encap:Local Loopback # inet addr:127.0.0.1 Mask:255.0.0.0 # inet6 addr: ::1/128 Scope:Host # UP LOOPBACK RUNNING MTU:16436 Metric:1 # RX packets:32928 errors:0 dropped:0 overruns:0 frame:0 # TX packets:32928 errors:0 dropped:0 overruns:0 carrier:0 # collisions:0 txqueuelen:0 # RX bytes:3604609 (3.4 MiB) TX bytes:3604609 (3.4 MiB) ifs=`/sbin/ifconfig | sed -n -e 's/^\([a-z0-9]\+\).*/name \1/p' \ -e 's/.*inet addr:\('$IPADDR_RE'\) .*/ipv4 \1/p' \ -e 's+.*inet6 addr: \('$IPADDR6_RE'\)/.*+ipv6 \1+p' | \ while read tag value; do case "${tag}" in name) case "${value}" in eth*) if="${value}" xenstore_rm_cached "attr/${if}" echo "${if}" ind=0;; *) unset if;; esac;; ipv4) [ -n "${if}" ] && xenstore_write_cached "attr/${if}/ip" "${value}";; ipv6) if [ -n "${if}" ]; then xenstore_write_cached "attr/${if}/ipv6/${ind}/addr" "${value}" ind=$((ind+1)) fi;; esac done` # remove any interfaces that have been unplugged or downed for at in $(xenstore_list_interfaces_cached) ; do for if in $ifs ; do [ "${if}" = "${at}" ] && continue 2 done xenstore_rm_cached "attr/${at}" done # distro if [ -f ${XE_LINUX_DISTRIBUTION_CACHE} ] ; then . ${XE_LINUX_DISTRIBUTION_CACHE} for key in os_name os_majorver os_minorver os_uname os_distro ; do new=$(eval echo \${${key}}) [ -n "${new}" ] && xenstore_write_cached "data/${key}" "${new}" done fi # whether I support ballooning or not xenstore_write_cached "control/feature-balloon" "1" # build time addons xenstore_write_cached "attr/PVAddons/MajorVersion" "6" xenstore_write_cached "attr/PVAddons/MinorVersion" "2" xenstore_write_cached "attr/PVAddons/MicroVersion" "0" xenstore_write_cached "attr/PVAddons/BuildVersion" "70442" xenstore_write_cached "attr/PVAddons/Installed" "1" # update xenstore if necessary if [ $XENSTORE_UPDATED -eq 1 ] ; then xenstore_write_cached "data/updated" "$(date)" fi