[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Xen-devel] Virtualization project idea
- To: Pasi Kärkkäinen <pasik@xxxxxx>
- From: Dhananjay Goel <dhananjaygoel123@xxxxxxxxx>
- Date: Fri, 27 Aug 2010 14:55:40 +0530
- Cc: David Markey <admin@xxxxxxxxxxx>, James Harper <james.harper@xxxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 27 Aug 2010 02:26:47 -0700
- Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; b=qCjPWfkzxodO37F3Pxz6GKLsQKbgZmI3L579IrGGPevFJoeiU5Q/kNwvOPzuhTfdDo yNNWZE0C1xl+QU9FnMzhjogtwjom4+e0shj/1OkSvgucv4Qx+kfZRF1WffA14aJnz68M S1JMS5GoxPxkH4zHnYZ8l9IeQW0EeSZ+9IWjo=
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
Would USB over IP not be helpful here?
>
USB over IP is just another way of doing direct USB passthru,
it doesn't really allow sharing the devices.
--Consider a use case: You are using your mobile for browsing internet on PC. Your mobile device
acts a usb modem for the host machine. That can not be used in guest for internet connectivity simuntaneously. You need to connect/disconnect every time to access internet whereas it would have been seamless internet connectivity.
Thanks, Dhananjay
On Fri, Aug 27, 2010 at 2:53 PM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
On Fri, Aug 27, 2010 at 10:20:44AM +0100, David Markey wrote:
> Would USB over IP not be helpful here?
>
USB over IP is just another way of doing direct USB passthru,
it doesn't really allow sharing the devices.
-- Pasi
>
> On 27 August 2010 10:19, Pasi Kärkkäinen <[1] pasik@xxxxxx> wrote:
>
> On Fri, Aug 27, 2010 at 02:45:12PM +0530, Dhananjay Goel wrote:
> > No, that's not possible with pvusb. pvusb is for direct passthru to
> > one/single vm.
> > You'd need some filesystem share (cifs/nfs/whatnot) to make such
> sharing
> > possible.
> > Comments: Is it possible to share USB keyboard, USB mouse, USB
> modem, etc
> > across VMs i.e host and guest(s)? If we connect USB keyboard, is it
> > possible to use it in guests?
> >
>
> This is implemented in XCI (Xen Client Initiative), and there has been
> some discussions how to get it traditional Xen, to help Xen VGA
> Passthrough usage.
>
> > Also, is it possible for us to modify the device driver of USB 2.0
> so that
> > all USB 2.0 devices are visible and can be used across all VMs?
> Please
> > suggest.
> >
>
> This won't be straight forward. Think about USB memory/flash stick.
> If every VM sees it, and simultaneously writes to it, the filesystem
> in it will get corrupted immediately!
>
> USB Passthru cannot be used to 'share' devices, it's for giving
> one/single VM
> direct access to the device.
>
> -- Pasi
>
> > Thanks,
> > Dhananjay
> >
> > On Fri, Aug 27, 2010 at 2:16 PM, Pasi Kärkkäinen
> <[1][3] pasik@xxxxxx> wrote:
> >
> > On Fri, Aug 27, 2010 at 01:37:49PM +0530, Dhananjay Goel wrote:
> > > Hi James/Pasi,
> > > I had a look at
> > > But I'm not sure if it supports sharing USB devices across
> VMs
> > (host and
> > > guest) i.e. if I plug in a flash drive then it would detect
> in both
> > host
> > > and guest and I'd be able edit files from all VMs rather
> than
> > mounting and
> > > unmounting everytime from 1 VM to other.
> > > Please let me know your thoughts on it.
> > >
> >
> > No, that's not possible with pvusb. pvusb is for direct passthru
> to
> > one/single vm.
> > You'd need some filesystem share (cifs/nfs/whatnot) to make such
> sharing
> > possible.
> >
> > -- Pasi
> > > Thanks,
> > > Dhananjay
> > >
> > > On Fri, Aug 27, 2010 at 4:28 AM, James Harper
> > > <[2][3][5] james.harper@xxxxxxxxxxxxxxxx> wrote:
> > >
> > > > Hi there!
> > > >
> > > > First I'd like to say that XEN plaform is really cool
> and
> > awesome.
> > > >
> > > > I'm an engineering student and is searching for a
> feasible
> > project in
> > > > virtualization. I'd like to know if its possible to
> share USB
> > devices
> > > (flash
> > > > drive, hard disk, mouse, keyboards etc) across guests
> and host
> > (VMs).
> > > Also, do
> > > > you have any idea to extend it? Or any innovative idea
> so that
> > we can
> > > > implement it.
> > > >
> > > > I'd appreciate any help. Thanks in advance.
> > > >
> > >
> > > Further to what Pasi said, I have partially ported the
> backend
> > interface
> > > and can hand you the code if you want. It's probable a bit
> stale
> > vs the
> > > current kernels and leaks memory under some circumstances
> but is
> > > probably better than starting from scratch.
> > > James
> > >
> > > References
> > >
> > > Visible links
> > > 2. mailto:[5][7]james.harper@xxxxxxxxxxxxxxxx
> >
> > References
> >
> > Visible links
> > 1. mailto:[8]pasik@xxxxxx
> > 2. [9]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
> > 3. mailto:[10]james.harper@xxxxxxxxxxxxxxxx
> > 4. [11]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
> > 5. mailto:[12]james.harper@xxxxxxxxxxxxxxxx
>
> _______________________________________________
> Xen-devel mailing list
> [13]Xen-devel@xxxxxxxxxxxxxxxxxxx
> [14]http://lists.xensource.com/xen-devel
> 2. http://wiki.xensource.com/xenwiki/XenVGAPassthrough
> 3. mailto:pasik@xxxxxx
> 8. mailto:pasik@xxxxxx
> 9. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
> 10. mailto:james.harper@xxxxxxxxxxxxxxxx
> 11. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
> 12. mailto:james.harper@xxxxxxxxxxxxxxxx
> 13. mailto:Xen-devel@xxxxxxxxxxxxxxxxxxx
> 14. http://lists.xensource.com/xen-devel
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
