Bug#653630: /sbin/mount.nfs: Re: nfs-common: Only root can unmount, nautilus badly confused

[Pavel Yakunin <pyakunin@gmail.com>]

I've tried:

- /run/mount/utab is empty even when my NFS share is mounted by user.
- corresponding entry in /etc/mtab is "liveserv:/mnt/library/ 
/mnt/library nfs 
rw,relatime,vers=3,rsize=262144,wsize=262144,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.1.104,mountvers=3,mountport=46570,mountproto=udp,local_lock=none,addr=192.168.1.104 
0 0" and it's indifferent to the trailing slash in /etc/fstab. But if 
there is no trailing slash in the fstab, another error message accurs 
"umount: /mnt/library mount disagrees with the fstab" (in this  case 
fstab and mtab entries are different).


> - if you mount a filesystem with the "user" option, the user who
>    mounted it will be written to /run/mount/utab.  While I've not
>    tested this for NFS, it's certainly the case for all other mounts.
>
> - when umounting a filesystem, the content of /etc/fstab should be
>    irrelevant.  The information needed is in /etc/mtab (/proc/mounts)
>    and /run/mount/utab.  If the NFS mount helpers are using fstab
>    during umount, I think that's a separate bug in its own right.
>
> - the trailing / may be an issue.  Does the entry (if any) in
>    /run/mount/utab match this?  Does adding a trailing / to the
>    umount command affect things?
>
> Regards,
> Roger