dadcfc334d
That parameter will be used later to request memory from qmemman just before loading savefile to memory, so it should match the real need. Do not allow values smaller than 400, to prevent storing some erroneous values. Fixes qubesos/qubes-issues#973
74 lines
2.0 KiB
Bash
Executable File
74 lines
2.0 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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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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bsdtar -cSf saved-cows.tar volatile.img
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echo "DVM savefile created successfully."
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