On Thu, 08/28 16:23, Eric Blake wrote:
> On 08/27/2014 11:53 PM, Fam Zheng wrote:
> > This is an analogue to Linux null_blk. It can be used for testing block
> > device emulation and general block layer functionalities such as
> > coroutines and throttling, where disk IO is not necessary or wanted.
> >
> > Use null:// for AIO version, and null-co:// for coroutine version.
> >
> > Signed-off-by: Fam Zheng <f...@redhat.com>
> >
> > ---
>
> > +++ b/qapi/block-core.json
> > @@ -1150,7 +1150,8 @@
> > 'data': [ 'archipelago', 'file', 'host_device', 'host_cdrom',
> > 'host_floppy',
> > 'http', 'https', 'ftp', 'ftps', 'tftp', 'vvfat', 'blkdebug',
> > 'blkverify', 'bochs', 'cloop', 'cow', 'dmg', 'parallels',
> > 'qcow',
> > - 'qcow2', 'qed', 'raw', 'vdi', 'vhdx', 'vmdk', 'vpc', 'quorum'
> > ] }
> > + 'qcow2', 'qed', 'raw', 'vdi', 'vhdx', 'vmdk', 'vpc', 'quorum',
> > + 'null' ] }
>
> As mentioned elsewhere, you probably want 'null' AND 'null-co'. Bummer
> that this list is mostly alphabetical, but that 'quorum' and 'null' are
> out of order.
I'll add null-co to the list. But this list is a bit far from alphabetical:
archipelago, ..., vvfat, blkdebug,...
>
> >
> > ##
> > # @BlockdevOptionsBase
> > @@ -1203,6 +1204,19 @@
> > 'data': { 'filename': 'str' } }
> >
> > ##
> > +# @BlockdevOptionsNull
> > +#
> > +# Driver specific block device options for the null backend.
> > +#
> > +# @size: size of the device in bytes.
>
> missing an #optional marker
Will add.
Thanks,
Fam
