[libvirt] [PATCH] storage: recognize gluster as networked file

Martin Kletzander mkletzan at redhat.com
Tue Nov 5 16:03:07 UTC 2013


On Tue, Nov 05, 2013 at 08:42:08AM -0700, Eric Blake wrote:
> On 11/05/2013 01:13 AM, Martin Kletzander wrote:
> > On Mon, Nov 04, 2013 at 02:30:50PM -0700, Eric Blake wrote:
> >> A qcow2 file with a backing file of 'gluster://host/vol/file' should
> >> not try to look for a directory named './gluster:/' in the file system.
> >>
> >> * src/util/virstoragefile.c (virBackingStoreIsFile): Broaden check
> >> to include all protocols.
> >>
> >> Signed-off-by: Eric Blake <eblake at redhat.com>
> >> ---
> >>
> 
> >> +    /* Reject anything that looks like a protocol (such as nbd: or
> >> +     * rbd:); if someone really does want a relative file name that
> >> +     * includes ':', they can always prefix './'.  */
> > 
> > This makes complete sense, I just can't figure out how qemu treats
> > this because when I tried it on upstream now, it ended up with a
> > segfault :)
> 
> A qemu segfault?  Can you post the reproduction recipe?
> 

I tried my first thing and it crashed.  This is enough:

qemu-img create -f qcow2 -o backing_file=gluster://test1.qcow2,backing_fmt=qcow2 test.qcow2 1M
qemu-img convert -f qcow2 -O raw test.qcow2 output.img

I just haven't had the time to check why and where it segfaults...

Martin
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