e2f3446f22
Apparently it doesn't work with some kernels - saved domain still needs original memory amount to restore successfully. This happens at least on 3.12.14 kernel. Because qfile-daemon-dvm always requests 400MB from qmemman, this change should harm anyone - in any case DispVM needs 400MB free memory to start. Note that "xl mem-set" line is still there, which makes savefile somehow smaller (so faster restore).
65 lines
1.6 KiB
Bash
Executable File
65 lines
1.6 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: $0 domainname savefile_to_be_created [preload script]
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exit 1
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fi
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export PATH=$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 ?
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exit 1
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fi
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if ! qvm-start $1 --no-guid --dvm ; then
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exit 1
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fi
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ID=`xl domid $1`
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if [ "$ID" = "" ] ; then
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echo cannot get domain id
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exit 1
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fi
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echo "Waiting for DVM domainid=$ID ..."
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if [ -n "$ENCODED_SCRIPT" ] ; then
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xenstore-write /local/domain/$ID/qubes-save-script "$ENCODED_SCRIPT"
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fi
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#set -x
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xenstore-write /local/domain/$ID/qubes-save-request 1
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xenstore-watch-qubes /local/domain/$ID/device/qubes-used-mem
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xenstore-read /local/domain/$ID/qubes-gateway | \
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cut -d . -f 3 | tr -d "\n" > $VMDIR/netvm-id.txt
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xl block-detach $1 xvdb
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MEM=$(xenstore-read /local/domain/$ID/device/qubes-used-mem)
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echo "DVM boot complete, memory used=$MEM. Saving image..."
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QMEMMAN_STOP=/var/run/qubes/do-not-membalance
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touch $QMEMMAN_STOP
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xl mem-set $1 $(($MEM/1000))
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sleep 1
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touch $2
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if ! xl save $1 $2 $VMDIR/$1.conf; 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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cd $VMDIR
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# Apparently baloon driver isn't effective enough on some kernels - xl
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# restore still needs initial memory amount
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#sed -i -e "s/^memory.*/memory = $((MEM/1000))/" dvm.conf
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tar -Scvf saved-cows.tar volatile.img
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echo "DVM savefile created successfully."
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