Re: [PATCH] umount: allow non-root umount of FUSE even if not in fstab

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On Mon, Mar 28, 2011 at 04:23:20PM +0200, Miklos Szeredi wrote:
> On Mon, 2011-03-28 at 16:04 +0200, Petr Uzel wrote:
> > Hi all,
> > 
> > I hacked the following patch with which it is possible to use 
> > "umount $dir" instead of "fusermount -u $dir", which IMHO is an
> > improvement in usability. It seems to work (at least for me), however,
> > I have to admit that I don't like it very much, because:
> > - it complicates umount
> > - duplicates code from fusermount
> 
> And this is not the only one that would have to be duplicated.  The
> mount and umount races that were fixed in fusermount in recently and not
> so recently would also have to be added to util-linux, which would
> actually be a good thing, since in theory they could affect fstab based
> user mounts as well (though that is much more unlikely than with fuse,
> where the user chooses the mountpoint).

Do you mean this commit:

8b3a0c74a15e237eb4b7053774600f0ce3fff403 
Fix race if two "fusermount -u" instances are run in parallel. 

?

> > - should (???) be implemented using umount helpers
> 
> The end goal is to implement permission checking for unprivileged mount
> and umount in the kernel.

OK, that sounds reasonable. Not something I'd have guts to look into,
though :)


Petr

--
Petr Uzel
IRC: ptr_uzl @ freenode

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