Re: ??????: [Xen-devel] some questions about the new blktap2 module

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Dec 21, 2009 at 08:10:30PM +0800, fanliang wrote:
> Thank you a lot for your attention . 
> I got the dom0 kernel source code from xensource.com, and I don't know 
> whether it's the same with  pv_ops dom0 source tree .  I'm wondering that how 
> can people use VHD devices under the new blktap2 if he use SUSE11 as dom0 , 
> whose kernel is 2.6.27 .  In my mind,  the new blktap2 module is developed 
> matching with kernel 2.6.18 . For example, blktap2 includes lots header files 
> from  linux-2.6.18. Is this right ? 
> 

pv_ops dom0 changelog is here:
http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=shortlog;h=xen/master

That's the tree xen-unstable automatically fetches/uses.

SLES11 2.6.27 Xen dom0 kernel is forward-ported from 2.6.18-xen. 
I'm not sure if Novell ported blktap2 aswell.

-- Pasi

> 
>  
> 
> -----????????????-----
> ?????????: Pasi Kärkkäinen [mailto:pasik@xxxxxx] 
> ????????????: 2009???12???21??? 17:17
> ?????????: fanliang
> ??????: xen-devel@xxxxxxxxxxxxxxxxxxx; Jeremy Fitzhardinge
> ??????: Re: [Xen-devel] some questions about the new blktap2 module
> 
> On Mon, Dec 21, 2009 at 05:00:56PM +0800, fanliang wrote:
> >    Hi, all:
> >        I have some questions when read the code of the new blktap2 module.
> >    One is  in function tapdisk_vbd_map_device ( ) . In this function , the
> >    userspace proccess tapdisk2 used ioctl like this :
> >         ioctl(ring->fd, BLKTAP_IOCTL_SETMODE, BLKTAP_MODE_INTERPOSE);
> >    From the context , we can get that "ring->fd " is the file handle of the
> >    ring-device  [/dev/xen/blktap-2/blktap[minor] ]  . In the blktap2 driver
> >    codes , I find that blktap_ring_ioctl() didn't implement the
> >    BLKTAP_IOCTL_SETMODE ioctl case . I used xen-unstable code package and
> >    linux-2.6.18-xen-3.4.2 code package.
> >    So my question is :
> >    1,  Is blktap2 code in xen-unstable not match with linux-2.6.18-xen-3.4.2
> >    ?
> >    2,  Any body used VHD disk with blktap2 ?
> > 
> 
> Hello,
> 
> Afaik blktap2 is not yet ready/working on pv_ops dom0 tree (xen-unstable uses 
> pv_ops dom0).
> 
> Jeremy can possibly comment more about the status of blktap2.
> 
> -- Pasi
> 
> 
> 

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