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49 lines
1.5 KiB
49 lines
1.5 KiB
#!/bin/sh
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#
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# This file should be places in pre-mount directory in dracut's initramfs
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#
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echo "Qubes initramfs script here:"
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if [ -e /dev/mapper/dmroot ] ; then
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die "Qubes: FATAL error: /dev/mapper/dmroot already exists?!"
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fi
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modprobe xenblk || modprobe xen-blkfront || echo "Qubes: Cannot load Xen Block Frontend..."
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echo "Waiting for /dev/xvda* devices..."
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while ! [ -e /dev/xvda ]; do sleep 0.1; done
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if [ `cat /sys/block/xvda/ro` = 1 ] ; then
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echo "Qubes: Doing COW setup for AppVM..."
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while ! [ -e /dev/xvdc ]; do sleep 0.1; done
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VOLATILE_SIZE=$(sfdisk -s /dev/xvdc)
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ROOT_SIZE=$(sfdisk -s /dev/xvda) # kbytes
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SWAP_SIZE=1024 # kbytes
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if [ $VOLATILE_SIZE -lt $(($ROOT_SIZE + $SWAP_SIZE)) ]; then
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ROOT_SIZE=$(($VOLATILE_SIZE - $SWAP_SIZE))
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fi
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sfdisk -q --unit B /dev/xvdc >/dev/null <<EOF
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0,$SWAP_SIZE,S
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,$ROOT_SIZE,L
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EOF
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if [ $? -ne 0 ]; then
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echo "Qubes: failed to setup partitions on volatile device"
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exit 1
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fi
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while ! [ -e /dev/xvdc1 ]; do sleep 0.1; done
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mkswap /dev/xvdc1
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while ! [ -e /dev/xvdc2 ]; do sleep 0.1; done
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echo "0 `cat /sys/block/xvda/size` snapshot /dev/xvda /dev/xvdc2 N 16" | \
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dmsetup --noudevsync create dmroot || { echo "Qubes: FATAL: cannot create dmroot!"; }
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echo Qubes: done.
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else
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echo "Qubes: Doing R/W setup for TemplateVM..."
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echo "0 `cat /sys/block/xvda/size` linear /dev/xvda 0" | \
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dmsetup --noudevsync create dmroot || { echo "Qubes: FATAL: cannot create dmroot!"; exit 1; }
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echo Qubes: done.
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fi
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dmsetup mknodes dmroot
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