Ok, thanks for the clarification. Bindfs will continue to live on my machines then!
Regards, Alexander On 20 June 2017 at 17:15, Hugo Mills <h...@carfax.org.uk> wrote: > On Tue, Jun 20, 2017 at 04:35:48PM +0200, Alexander Peganz wrote: >> Hello everyone, >> >> I intend to provide different "views" of the data stored on btrfs subvolumes. >> e.g. mount a subvolume in location A rw; and ro in location B while >> also overwriting uids, gids, and permissions. >> In the past I have been using fuse.bindfs for this. Now I'm trying to >> find out if there is a 'native' way to do this in btrfs, and if it >> works by design or by accident (I wouldn't want to rely on something >> that might go away in a newer kernel version). >> >> So here goes: >> Do different uid/gid/... mount options for different subvolumes work? > > No. uid= and gid= mount options don't work at all for btrfs (or on > most other filesystems with their own concept of file ownership). You > can't arbitrarily change the ownership of files like this -- except > for filesystems like FAT, which don't have the concept at all. > >> Or does the first mounted subvolume "win"? > > See above. The options don't do anything. > >> Can a subvolume be mounted more than once (I guess not, but btrfs >> might surprise me)? > > Yes. > >> Is there some completely different way I don't know about to do this >> in btrfs that might not even have anything to do with mount options? > > If you want to do it, it'll _have_ to be done without mount > options, because the options you're proposing to use don't work. > > As far as I know, there's no mount option for this in btrfs (or any > other POSIX filesystem), and there are no plans to implement such a > feature. > >> If there is no magical btrfs way, does fuse.bindfs play nice with >> btrfs or should I be worried? > > We haven't had any complaints about it that I'm aware of. > > Hugo. > > -- > Hugo Mills | I believe that it's closely correlated with the > hugo@... carfax.org.uk | aeroswine coefficient > http://carfax.org.uk/ | > PGP: E2AB1DE4 | Adrian Bridgett -- 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
