Re: snapshots of encrypted directories?

[Ulli Horlacher <framstag@rus.uni-stuttgart.de>]

On Fri 2017-09-15 (12:15), Peter Becker wrote:
> 2017-09-15 12:01 GMT+02:00 Ulli Horlacher <framstag@rus.uni-stuttgart.de>:
> 
> > On Fri 2017-09-15 (06:45), Andrei Borzenkov wrote:
> >
> >> The actual question is - do you need to mount each individual btrfs
> >> subvolume when using encfs?
> >
> > And even worse it goes with ecryptfs: I do not know at all how to mount a
> > snapshot, so that the user has access to it.
> 
> A snapshot is simply a subvolume.
> 
> Get the ID of the snapshot and mount it:
> 
> btrfs subvolume list /btrfs
> mount -o subvolid=<ID> /dev/<DISK> /<MOUNTPOINT_ENCRYPTED>
> 
> Or mount the snapshot directly by path:
> 
> mount -o subvol=/snapshots/home/2015-12-01 /<MOUNTPOINT_ENCRYPTED>
> 
> And then mount enryptfs:
> 
> mount.ecryptfs /<MOUNTPOINT_ENCRYPTED> /<MOUNTPOINT_DECRYPTED>

This only possible by root.
For a user it is not possible to have access for his own snapshots.
Bad.


-- 
Ullrich Horlacher              Server und Virtualisierung
Rechenzentrum TIK         
Universitaet Stuttgart         E-Mail: horlacher@tik.uni-stuttgart.de
Allmandring 30a                Tel:    ++49-711-68565868
70569 Stuttgart (Germany)      WWW:    http://www.tik.uni-stuttgart.de/
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