On Mon, 23.03.15 08:36, Chris Mason (c...@fb.com) wrote: > On Mon, Mar 23, 2015 at 12:57 AM, Lennart Poettering <mzerq...@0pointer.de> > wrote: > >Heya! > > > >So what's the story on recursive btrfs snapshotting and snapshot > >removal? Since a while systemd has now by default creating btrfs > >subvolumes for /var/lib/machines for example. Now, if that code is run > >inside a container, and the container itself already is stored in a > >subvolume we end up with a subvolume inside a subvolume, which > >currently breaks snapshotting and deletion of the outer container > >subvolume. > > > >What's the plan regarding recursive versions of the operations? Any > >plan to add this? We could work around this in userspace, of course, > >but it would not be atomic, and I'd much prefer if the kernel could do > >this on its own! > > Hi Lennart, > > I've got a patch to btrfs-progs that can do the recursive snapshotting, let > me clean it up and submit to Dave. For recursive deletion I think the same > method can be used.
OK, so this means you want this to be solved in userspace, hence in a non-atomic fashion? What precisely will your code do? Enumerate the subvolumes and simply snapshot all subvolumes below the desired path? Or anything smarter? Lennart -- Lennart Poettering, Red Hat -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
