Re: [PATCH v0 RFC 0/2] xl/libxl support for PVUSB

[Simon Cao <caobosimon@gmail.com>]

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Hi,

I was working on the work. But I was busing preparing some job interviews
in the last three months, sorry for this long delay. I will update my
progress in a few days.

Thanks!

Bo Cao

On Mon, Nov 10, 2014 at 4:37 PM, Chun Yan Liu <cyliu@suse.com> wrote:

> Is there any progress on this work? I didn't see new version after this.
> Anyone knows the status?
>
> Thanks,
> Chunyan
>
> >>> On 8/11/2014 at 04:23 AM, in message
> <1407702234-22309-1-git-send-email-caobosimon@gmail.com>, Bo Cao
> <caobosimon@gmail.com> wrote:
> > Finally I have a workable version xl/libxl support for PVUSB. Most of
> > its commands work property now, but there are still some probelm to be
> > solved.
> > Please take a loot and give me some advices.
> >
> > == What have been implemented ? ==
> > I have implemented libxl functions for PVUSB in libxl_usb.c. It mainly
> > consists of two part:
> > usbctrl_add/remove/list and usb_add/remove/list in which usbctrl denote
> usb
> > controller in which
> > usd device can be plugged in. I don't use "ao_dev" in
> > libxl_deivce_usbctrl_add since we don't need to
> > execute hotplug script for usbctrl and without "ao_dev", adding default
> > usbctrl for usb device
> > would be easier.
> >
> > For the cammands to manipulate usb device such as "xl usb-attach" and "xl
> > usb-detach", this patch now only
> > support to specify usb devices by their interface in sysfs. Using this
> > interface, we can read usb device
> > information through sysfs and bind/unbind usb device. (The support for
> > mapping the "lsusb" bus:addr to the
> > sysfs usb interface will come later).
> >
> > == What needs to do next ? ==
> > There are two main problems to be solved.
> >
> > 1.  PVUSB Options in VM Guest's Configuration File
> >     The interface in VM Guest's configuration file to add usb device is:
> > "usb=[interface="1-1"]".
> > But the problem is now is that after the default usbctrl is added, the
> state
> > of usbctrl is "2", e,g, "XenbusStateInitWait",
> > waiting for xen-usbfront to connect. The xen-usbfront in VM Guest isn't
> > loaded. Therefore, "sysfs_intf_write"
> > will report error. Does anyone have any clue how to solve this?
> >
> > 2. sysfs_intf_write
> >     In the process of "xl usb-attach domid intf=1-1", after writing
> "1-1" to
> > Xenstore entry, we need to
> > bind the controller of this usb device to usbback driver so that it can
> be
> > used by VM Guest. For exampele,
> > for usb device "1-1", it's controller interface maybe "1-1:1.0", and we
> > write this value to "/sys/bus/usb/driver/usbback/bind".
> > But for some devices, they have two controllers, for example "1-1:1.0"
> and
> > "1-1:1.1". I think this means it has two functions,
> > such as usbhid and usb-storage. So in this case, we bind the two
> controller
> > to usbback?
> >
> > ========
> > There maybe some errors or bugs in the codes. Feel free to tell me.
> >
> > Cheers,
> >
> > - Simon
> >
> > ---
> > CC: George Dunlap <george.dunlap@eu.citrix.com>
> > CC: Ian Jackson <ian.jackson@citrix.com>
> > CC: Ian Campbell <ian.campbell@citrix.com>
> > CC: Pasi Kärkkäinen <pasik@iki.fi>
> > CC: Lars Kurth <lars.kurth@citrix.com>
> >
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
> >
>
>

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