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Date: Wed, 14 Oct 2009 18:07:55 +0200
From: Gerd Hoffmann <kraxel@redhat.com>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] [PATCH] Pass the drive's readonly attribute to the
	guest OS
References: <4AD5F3BD.2040402@redhat.com> <4AD5F4FB.6040905@redhat.com>
	<4AD5F575.90901@redhat.com>
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To: Naphtali Sprei <nsprei@redhat.com>
Cc: qemu-devel@nongnu.org

On 10/14/09 17:59, Naphtali Sprei wrote:
> Gerd Hoffmann wrote:
>> On 10/14/09 17:52, Naphtali Sprei wrote:
>>> Hi,
>>> as a preliminary step for adding read only flag for the -drive
>>> command, I've added code to pass
>>> the (existing) read only attribute of the drive to the guest OS (if it
>>> bother to ask).
>>>
>>> I've added for virtio and for scsi.
>>
>>> Where is usb ??
>>
>> hw/usb-msd.c
>
> Thanks,
> what I meant is I can't find how can it be specified as a drive interface.

You can use either

   -usbdevice disk:/some/image
   (usb_add in monitor)

or

   -drive if=none,id=pendrive,file=/some/image
   -device usb-storage,drive=pendrive
   (drive_add + device_add in monitor)

cheers,
   Gerd