82 lines
2.2 KiB
Bash
Executable File
82 lines
2.2 KiB
Bash
Executable File
#!/bin/bash
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set -o pipefail
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get_encoded_script()
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{
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ENCODED_SCRIPT=`
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if [ "$1" == "vm-default" ]; then
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echo /usr/lib/qubes/dispvm-prerun.sh
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else
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cat "$1"
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fi | base64 -w0` || exit 1
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}
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if [ $# != 2 -a $# != 3 ] ; then
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echo "usage: $0 domainname savefile_to_be_created [preload script]" >&2
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exit 1
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fi
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export PATH=$PATH:/sbin:/usr/sbin
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if [ $# = 3 ] ; then
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get_encoded_script $3
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fi
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VMDIR=/var/lib/qubes/appvms/$1
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if ! [ -d $VMDIR ] ; then
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echo "$VMDIR does not exist ?" >&2
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exit 1
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fi
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if ! qvm-start $1 --dvm ; then
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exit 1
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fi
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ID=`virsh -c xen:/// domid $1`
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echo "Waiting for DVM $1 ..." >&2
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if [ -n "$ENCODED_SCRIPT" ] ; then
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qubesdb-write -d $1 /qubes-save-script "$ENCODED_SCRIPT"
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fi
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#set -x
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qubesdb-write -d $1 /qubes-save-request 1
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qubesdb-watch -d $1 /qubes-used-mem
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qubesdb-read -d $1 /qubes-gateway | \
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cut -d . -f 3 | tr -d "\n" > $VMDIR/netvm-id.txt
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kill `cat /var/run/qubes/guid-running.$ID`
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# FIXME: get connection URI from core scripts
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virsh -c xen:/// detach-disk $1 xvdb
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MEM=$(qubesdb-read -d $1 /qubes-used-mem | grep '^[0-9]\+$' | head -n 1)
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echo "DVM boot complete, memory used=$MEM. Saving image..." >&2
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QMEMMAN_STOP=/var/run/qubes/do-not-membalance
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touch $QMEMMAN_STOP
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virsh -c xen:/// setmem $1 $MEM
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# Add some safety margin
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virsh -c xen:/// setmaxmem $1 $[ $MEM + 1024 ]
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# Stop qubesdb daemon now, so VM can restart it later
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kill `cat /var/run/qubes/qubesdb.$1.pid`
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sleep 1
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touch $2
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if ! virsh -c xen:/// save $1 $2; then
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rm -f $QMEMMAN_STOP
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qvm-kill $1
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exit 1
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fi
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rm -f $QMEMMAN_STOP
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# Do not allow smaller allocation than 400MB. If that small number comes from
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# an error, it would prevent further savefile regeneration (because VM would
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# not start with too little memory). Also 'maxmem' depends on 'memory', so
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# 400MB is sane compromise.
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if [ "$MEM" -lt 409600 ]; then
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qvm-prefs -s $1 memory 400
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else
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qvm-prefs -s $1 memory $[ $MEM / 1024 ]
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fi
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ln -snf $VMDIR /var/lib/qubes/dvmdata/vmdir
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cd $VMDIR
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fstype=`df --output=fstype $VMDIR | tail -n 1`
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if [ "$fstype" = "tmpfs" ]; then
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# bsdtar doesn't work on tmpfs because FS_IOC_FIEMAP ioctl isn't supported
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# there
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tar -cSf saved-cows.tar volatile.img
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else
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bsdtar -cSf saved-cows.tar volatile.img
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fi
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echo "DVM savefile created successfully."
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