Re: [Xen-devel] xen 4.1.1 + 3.0.0-rc5 dom0 + blktap2

[Daniel Stodden <daniel.stodden@xxxxxxxxxx>]

On Tue, 2011-06-28 at 22:32 -0400, Daniel Stodden wrote:
> On Tue, 2011-06-28 at 22:08 -0400, Sébastien Riccio wrote:
> > Hi,
> > 
> > I'm currently trying xen 4.1.1 with the 3.0.0-rc5 (heard that it now 
> > contains the xen code to run as front or back xen domain).
> > 
> > Everything seems to run fine, except that I am trying since a  few hours 
> > to mount a .vhd file in the dom0.
> > 
> > What I tried so far:
> > 
> > to create a blank vhd file (this is working):
> > host# vhd-util create -n /storage/test.vhd -s 20G
> > 
> > Then i try to mount the file in dom0 (as stated in a blktap2 README file)
> > host# tapdisk2 -n vhc:/storage/test.vhd
> 
> tap-ctl create -n vhd:/storage/test.vhd # :)
> 
> As a rule of thumb, there's no excuse to call tapdisk2 on the command
> line. Should actually rather have gone into libexec.
> 
> Daniel
> 
> > it fails, returning:
> > tapdisk2: invalid option -- 'n'
> > usage: tapdisk2 <-u uuid> <-c control socket>
> > 
> > Then i've tried:
> > host# tap-ctl  list
> > 
> > It returns:
> > blktap kernel module not installed

Yeah, we got blk*back* upstream, but not blktap.

You're building from git? Good.

$ git remote add daniel git://xenbits.xensource.com/people/dstodden/linux.git
$ git fetch daniel
$ git merge daniel/blktap/next-2.6.39

There might be a dedicated blktap/next-3.x at some point, but last time
I checked (which was -rc3), it should merge + build just fine.

$ make menuconfig
    drivers -> block -> "blktap userspace devices" -> m

$ ...
$ modprobe blktap

Daniel

> > Then tried too:
> > host# xl block-attach 0 tap:vhd:/storage/test.vhd xvda w 0
> > 
> > It does not complain but nothing happens.
> > 
> > Am I getting something wrong about how to do it ? Does the 3.0.0-rc5 
> > kernel is missing something ?
> > (look like there is no blktap module in the kernel tree, but blkback 
> > that I enabled, don't know if it's the same)
> > 
> > I have no more ideas about what to try next. Any clue ?
> > 
> > Thanks a lot for your help!
> > 
> > Kind regards,
> > Sébastien
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> 
> 



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