Re: [Qemu-devel] [PATCH for-2.6 v2 04/10] fdc: add default drive type option

[Eric Blake <eblake@redhat.com>]

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On 12/07/2015 04:34 PM, John Snow wrote:
> This patch adds a new explicit Floppy Drive Type option. The existing
> behavior in QEMU is to automatically guess a drive type based on the
> media inserted, or if a diskette is not present, arbitrarily assign one.
> 
> This behavior can be described as "auto." This patch adds explicit
> behaviors: 120, 144, 288, auto, and none. The new "auto" behavior
> is intended to mimick current behavior, while the other types pick

s/mimick/mimic/ (one of those weird 'ic' verbs where the 'k' is
necessary in past tense but not present tense)

> one explicitly.
> 
> In a future patch, the goal is to change the FDC's default drive type
> from auto (falling back to 1.44MB) to auto (falling back to 2.88MB).
> 
> In order to allow users to obtain the old behaviors, though, a mechanism
> for specifying the exact type of drive we want is needed.
> 
> This patch adds the properties, but it is not acted on yet in favor of
> making those changes a little more explicitly clear in standalone patches
> later in this patch set.
> 
> Signed-off-by: John Snow <jsnow@redhat.com>
> ---

> +++ b/qapi/block.json
> @@ -40,6 +40,22 @@
>    'data': ['auto', 'none', 'lba', 'large', 'rechs']}
>  
>  ##
> +# @FloppyDriveType
> +#
> +# Type of Floppy drive to be emulated by the Floppy Disk Controller.
> +#
> +# @144:  1.44MB 3.5" drive
> +# @288:  2.88MB 3.5" drive
> +# @120:  1.5MB 5.25" drive

Names start with a digit - not the prettiest, but also not the first
instance, so qapi handles it just fine.  And I don't have any
suggestions for a better yet still concise name.

> +# @none: No drive connected
> +# @auto: Automatically determined by inserted media at boot
> +#
> +# Since: 2.6
> +##
> +{ 'enum': 'FloppyDriveType',
> +  'data': ['144', '288', '120', 'none', 'auto']}

Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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