On Tue, Oct 06, 2015 at 10:09:26AM -0700, Mark Fasheh wrote:
> On Tue, Oct 06, 2015 at 10:25:52AM +0200, David Sterba wrote:
> > On Thu, Oct 01, 2015 at 02:30:47PM -0700, Mark Fasheh wrote:
> > > At the moment, userspace has no way of knowing when a snapshot is finally
> > > removed. This has become a problem when writing tests for btrfs,
> > >
> > > http://article.gmane.org/gmane.comp.file-systems.fstests/1239/
> >
> > In the meantime the command 'btrfs subvolume sync /path id' has been
> > implemented which does what you need, without the new ioctl.
>
> Ahh ok I didn't see that I'll take a look, thanks.
Hmm this isn't working for me, am I doing anything wrong?
mkfs.btrfs -f /dev/vdb1
mount -t btrfs /dev/vdb1 /btrfs/
cd /btrfs/
btrfs quota enable /btrfs
btrfs su create sub1
cp -a /boot/* sub1/
btrfs su create sub2
cp -a /boot/* sub2
btrfs su de sub1 -c
btrfs su sy /btrfs/
cd /
umount /btrfs
btrfsck --qgroup-report /dev/vdb1
The output of btrfsck (and btrfs-debug-tree) will show the subvolume still
existing on disk. I tried '-c' and '-C' with the 'btrfs su de' command and
neither made a difference.
This is on btrfs-progs v4.2.2+20151005.
Thanks,
--Mark
--
Mark Fasheh
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