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Date: Mon, 21 Jul 2014 11:47:40 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] USB MTP emulation state?
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Stefan Hajnoczi <shajnocz@redhat.com>, qemu-devel <qemu-devel@nongnu.org>

Il 21/07/2014 11:12, Gerd Hoffmann ha scritto:
> On Fr, 2014-07-18 at 15:25 +0200, Paolo Bonzini wrote:
>> I took a quick look at the MTP emulation and the first things I noticed are:
>>
>> * all I/O is synchronous
>> 	>> I guess this is just a limitation of the code
> 
> Correct.
> 
> USB subsystem allows to kick off I/O & return (with the special return
> code USB_RET_ASYNC), then signal completion for the usb packet later,
> using usb_packet_complete().
> 
> usb-storage does this for example.
> 
>> * it doesn't use the -fsdev infrastructure
>> 	>> Perhaps we should rename the "root" property to
>> 	   x-root to identify it as experimental?
>>
>> * it doesn't do writes
>> 	>> No idea if this is a limitation of the protocol
>>
>> Anything we can do before 2.1 is out?
> 
> Given that we are in hard freeze renaming the root property to move it
> into experimental namespace is the only reasonable thing IMO.

Sounds good, thanks!

Paolo