[Libguestfs] missing btrfs subvol support

[Pino Toscano]

On Friday 17 October 2014 11:25:03 Olaf Hering wrote:
> On Thu, Oct 16, Olaf Hering wrote:
> > I can probably add a check somewhere to catch the whatever=="@". A
> > better fix would be to check if a given subvolume is for the entire
> > partition.
> 
> So after talking to David Sterba there is no way to tell if a given
> subvolume is for the entire partition.
> Also my attempt to "fix" it by using the -o option is unreliable.
> 
> Richard, so what should be done with the root-partition-listed-twice
> issue mentioned in the URL above? Just check for a plain '@', assume
> thats the entire thing, and skip it to not set is_root=1?

Is '@' a particular marker for this situation? Or, from what I get, 
there can be any label for this?

> The other bug is that mounting subvolumes in such setup fails anyway
> because the subvol= argument lacks the absolute path. It was suggested
> to use the "subvolume list" option -a and tweak the resulting list.
> There is a <FS_TREE> prefix, which shouldnt be there according to
> David.

Do you have a way to reproduce the above situation (and possibly the 
root-partition-listed-twice situation too)? I'm not too familiar with 
btrfs yet, and my couple of simple installation of the latest beta of 
openSUSE 13.2 didn't get me that.

Thanks,
-- 
Pino Toscano