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Revision d191d12d

IDd191d12d5f479422e16ed1d12b0222547b29036a

Added by Stefan Weil almost 13 years ago

qcow2: Allow qcow2 disk images with size zero

Images with disk size 0 may be used for
VM snapshots, but not to save normal block data.

It is possible to create such images using
qemu-img, but opening them later fails.

So even "qemu-img info image.qcow2" is not
possible for an image created with
"qemu-img create -f qcow2 image.qcow2 0".

This is fixed here.

Signed-off-by: Stefan Weil <>
Signed-off-by: Anthony Liguori <>

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