8ff9cbe299
As described in QubesOS/qubes-issues#3758, a VM may fail to start if the volume is large. This because the whole volume is read to ensure it's empty (=all zeros). This changes limits the check to the first 1 GiB of the private volume. As additional safety, a scan with blkid is done. Fixes https://github.com/QubesOS/qubes-issues/issues/3758
41 lines
1.4 KiB
Bash
Executable File
41 lines
1.4 KiB
Bash
Executable File
#!/bin/sh
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set -e
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dev=/dev/xvdb
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max_size=1073741824 # check at most 1 GiB
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if [ -e "$dev" ] ; then
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# The private /dev/xvdb device is present.
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# check if private.img (xvdb) is empty - all zeros
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private_size=$(( $(blockdev --getsz "$dev") * 512))
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if [ $private_size -gt $max_size ]; then
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private_size=$max_size
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fi
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if cmp --bytes $private_size "$dev" /dev/zero >/dev/null && { blkid -p "$dev" >/dev/null; [ $? -eq 2 ]; }; then
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# the device is empty, create filesystem
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echo "Virgin boot of the VM: creating private.img filesystem on $dev" >&2
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if ! content=$(mkfs.ext4 -m 0 -q "$dev" 2>&1) ; then
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echo "Virgin boot of the VM: creation of private.img on $dev failed:" >&2
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echo "$content" >&2
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echo "Virgin boot of the VM: aborting" >&2
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exit 1
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fi
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if ! content=$(tune2fs -m 0 "$dev" 2>&1) ; then
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echo "Virgin boot of the VM: marking free space on $dev as usable failed:" >&2
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echo "$content" >&2
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echo "Virgin boot of the VM: aborting" >&2
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exit 1
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fi
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fi
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echo "Private device management: checking $dev" >&2
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if content=$(fsck.ext4 -p "$dev" 2>&1) ; then
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echo "Private device management: fsck.ext4 of $dev succeeded" >&2
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else
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echo "Private device management: fsck.ext4 $dev failed:" >&2
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echo "$content" >&2
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fi
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fi
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