Am 29.11.2013 um 21:41 hat Max Reitz geschrieben: > Leaving the backing file open although it is not needed anymore can > cause problems if it is opened through a block driver which allows > exclusive access only and if the create function of the block driver > used for the top image (the one being created) tries to close and reopen > the image file (which will include opening the backing file a second > time). > > In particular, this will happen with a backing file opened through > qemu-nbd and using qcow2 as the top image file format (which reopens the > image to flush it to disk). > > Signed-off-by: Max Reitz <mre...@redhat.com> > --- > v2: > - Minimizing the changes prevents introducing a leak of the > BlockDriverState in case of an error in bdrv_open() (thanks, Kevin).
Reviewed-by: Kevin Wolf <kw...@redhat.com>
