Bug 507964 - mount -a tries to mount mounted fuse filesystem
mount -a tries to mount mounted fuse filesystem
Product: Fedora
Classification: Fedora
Component: fuse (Show other bugs)
All Linux
low Severity low
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Assigned To: Peter Lemenkov
Fedora Extras Quality Assurance
Depends On:
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Reported: 2009-06-24 17:03 EDT by Osipov Oleg
Modified: 2010-10-27 06:56 EDT (History)
5 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2010-10-27 06:49:14 EDT
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Description Osipov Oleg 2009-06-24 17:03:36 EDT
Description of problem:
"mount-a" tries to mount already mounted fuse filesystem.

Version-Release number of selected component (if applicable):
==begin cut==
$ mount --version
mount from util-linux-ng 2.14.2 (with libblkid and selinux support)
==end cut====

How reproducible:

Steps to Reproduce:
1. install bindfs or some other fuse-based filesystem (sshfs, etc)
2. Add new mountpoint to /etc/fstab:
==begin cut==
bindfs#/srv/ftp/pub/music_cp1251_hide   /srv/ftp/pub/music_cp1251       fuse    ro,nosuid,nodev,allow_other,default_permissions,user=legolegs,group=users 0 0
==end cut====
3. [root@localhost] # mount -a
4. [root@localhost] # mount -a
Yes, run twice or more. Or reboot: during boot filesystems mounts twice - after loading kernel and after starting up network (i mean /etc/rc.d/init.d/netfs).

Actual results:
First "mount -a" work normally. Second prints error message:
==begin cut==
fuse: mountpoint is not empty
fuse: if you are sure this is safe, use the 'nonempty' mount option
==end cut====

Expected results:
First "mount -a" should mount new mountpoint normally. Second should notice all mouned filesystems and do nothing.

Additional info:
Some fuse silesystems (convmvfs for example) allow both fstab sintax:

somefuse#/from /mnt/to fuse defaults 0 0


somefuse /mnt/to fuse src_dir=/from 0 0

"mount -a" properly work only with second variant.
Comment 1 Penelope Fudd 2009-07-29 14:46:45 EDT
I'm also experiencing a problem with sshfs.  To add an entry to /etc/fstab, my usual procedure is to mount the directory manually, and then copy the entry from /etc/mtab to /etc/fstab.  In the case of sshfs, it doesn't work.  If I edit the fstab entry to be like this:

sshfs#server: /mnt/server fuse rw,nosuid,nodev,max_read=65536 0 0

then I can mount it, but the mtab entry looks like this:

server: /mnt/server fuse.sshfs rw,nosuid,nodev,max_read=65536 0 0

It seems that if the fstab entry doesn't look like the mtab entry, then mount -a will try to mount it again.

See also https://bugs.launchpad.net/ubuntu/+source/sshfs-fuse/+bug/243298
Comment 2 Karel Zak 2009-07-29 16:07:29 EDT
(In reply to comment #1)
> It seems that if the fstab entry doesn't look like the mtab entry, then mount
> -a will try to mount it again.

 Sure. mount(8) uses fsname+mountpoint pair to compare fstab with mtab.

> See also https://bugs.launchpad.net/ubuntu/+source/sshfs-fuse/+bug/243298  

 I see. The /sbin/mount.fuse helper has to write correct information to mtab. This is not a bug in [u]mount(8).
Comment 3 Bug Zapper 2010-04-27 11:14:08 EDT
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Approximately 30 (thirty) days from now Fedora will stop maintaining
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Comment 4 Bug Zapper 2010-07-30 06:41:22 EDT
This bug appears to have been reported against 'rawhide' during the Fedora 14 development cycle.
Changing version to '14'.

More information and reason for this action is here:
Comment 5 Peter Lemenkov 2010-10-27 06:49:14 EDT
it seems that it was finally fixed - I tried to add the following line into /etc/fstab

petro@localhost: /home/petro/fuse/sshfs/localhost fuse.sshfs users,rw,nosuid,nodev,max_read=65536,user=petro 0 0

and it does appears in /etc/fstab as is.  Also typing mount -a several times also works.

P.S. F-14, fuse-2.8.4-1.fc14.i686

Feel free to reopen this ticket again if problem still exists.

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