
The qcow2, qcow, and vmdk block drivers are based on coroutines. They have a coroutine mutex which protects internal state. We can convert the .bdrv_is_allocated() function to .bdrv_co_is_allocated() by holding the mutex around the cluster lookup operation. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Read the documentation in qemu-doc.html. Fabrice Bellard.
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