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Re: [Qemu-devel] virtio block device and sysfs
From: |
john cooper |
Subject: |
Re: [Qemu-devel] virtio block device and sysfs |
Date: |
Thu, 22 Apr 2010 16:48:26 -0400 |
User-agent: |
Thunderbird 2.0.0.9 (X11/20071115) |
Marc Haber wrote:
> Hi,
>
> On Mon, Mar 22, 2010 at 10:22:14AM -0400, john cooper wrote:
>> Marc Haber wrote:
>>> It the serial "number" can be alphanumeric, that would be great to have.
>> It is simply a string of 20 characters, which AFAICT has
>> its roots in the ATA S/N convention along with many other
>> puzzling present day evils.
>
> That would be enough for my purposes, but more would be acceptable as
> well.
Internally the s/n string is currently limited to 20 bytes.
>> All that said, I like the alternate choice of adding a
>> special virtio request far better. It is actually simpler
>> (and more maintainable IMO) than going through the
>> gyrations of stuffing the S/N data through PCI config
>> space.
>
> Whatever is more easily implemented ;) How would a Windows
> installation see the label then?
Unknown at this point. That was part of my earlier motivation
to package up this information as an ATA_IDENTIFY command which
AFAIK is digestible by windows.
> Has my wish made its way on the official wishlist and/or roadmap?
I submitted a virtio-based patch a few weeks ago. I'd been
waiting for a reply from you concerning the /sys support
you'd mentioned. If that plan has fallen by the wayside
I'll forward a more robust ioctl patch to Rusty so we can
tie this off.
-john
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