Re: [Qemu-devel] [PATCH v2 1/3] scsi-disk: Allow overriding SCSI INQUIRY removable bit

[Stefan Hajnoczi <stefanha@gmail.com>]

On Tue, Jan 18, 2011 at 12:06 PM, Stefan Hajnoczi <stefanha@gmail.com> wrote:
> On Tue, Jan 18, 2011 at 11:39 AM, Kevin Wolf <kwolf@redhat.com> wrote:
>> Am 18.01.2011 11:10, schrieb Stefan Hajnoczi:
>>> Provide the "removable" qdev property bit to override the SCSI INQUIRY
>>> removable (RMB) bit for non-CDROM devices.  This will be used by USB
>>> Mass Storage Devices, which sometimes have this guest-visible bit set
>>> and sometimes do not.  They therefore requires a means for user
>>> configuration.
>>>
>>> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
>>
>> Should we print an error message when the user tries to make a CD-ROM
>> non-removable instead of silently ignoring the option?
>
> Good point.  I will add a check in scsi_disk_initfn() for v3.

Actually this case is hard to check against.  The removable property
is a boolean that defaults to false.  We can't detect the difference
between default, cleared, or set.

I'm sending out a new version of the patch series that updates
docs/qdev-device-use.txt to describe how the removable property works.

Stefan