On 14.03.2016 12:31, Kevin Wolf wrote: > Am 08.03.2016 um 17:34 hat Kevin Wolf geschrieben: >> All users of the block layers are supposed to go through a BlockBackend. >> The .bdrv_create() implementations are such users, so this series >> converts them. >> >> This series (specifically patch 1) will also help with moving the >> writethrough cache implementation from BDS to BB, where it really >> belongs. Once this is moved, it wouldn't be possible to use bdrv_open() >> to use a standalone BDS writethrough any more. >> >> Of course, writethrough doesn't make any sense in .bdrv_create() anyway, >> so while I'm still converting everything to BB where it would keep >> working (because that's the Right Thing), the drivers don't actually >> make use of this fact any more after this series. > > Applied to the block branch.
Now you can't name any BB "image" any more if you want to use e.g.
drive-mirror. Intended?
Example:
$ x86_64-softmmu/qemu-system-x86_64 -drive
if=none,id=image,file=null-co://,driver=raw -qmp stdio
{'execute':'qmp_capabilities'}
{"return": {}}
{'execute':'drive-mirror','arguments':{'device':'image','target':'foo.qcow2','sync':'full','format':'qcow2'}}
Formatting 'foo.qcow2', fmt=qcow2 size=1073741824 encryption=off
cluster_size=65536 lazy_refcounts=off refcount_bits=16
{"error": {"class": "GenericError", "desc": "Device with id 'image'
already exists"}}
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