ext2fs and NFS

Craig Rodrigues rodrigc at crodrigues.org
Tue Jun 13 03:30:06 UTC 2006

On Wed, Oct 26, 2005 at 10:39:08PM +0000, Bob Hepple wrote:
> I need to export an ext2fs file system mounted@/mnt/guest - it's a
> removable IDE disc that I carry to & from my linux system at work...
> "mount" shows:
> /dev/ad2s1 on /mnt/guest (ext2fs, local)
> So, I put an entry into /etc/exports:
> /mnt/guest -alldirs -network -mask
> and then:
> kill -s HUP `cat /var/run/mountd.pid`
> "showmount localhost" shows nothing and in /var/log/messages I have:
> Oct 27 11:36:01 raita kernel: ext2fs doesn't support the old mount syscall
> Oct 27 11:36:01 raita mountd[417]: can't export /mnt/guest
> Oct 27 11:36:01 raita mountd[417]: bad exports list line /mnt/guest -network -mask
> ... so there's really no way to NFS export an ext2fs file system???


The mountd program in FreeBSD previously had some hard-coded restrictions
on which filesystems it could export (ufs, msdosfs, cd9660, and ntfs).

I converted the mountd program to use the nmount() syscall, and removed
the hardcoded restrictions on what filesystems can be NFS exported.
As long as the underlying filesystem supports NFS exporting, it should
work.  It should now work for ext2fs.

If you cvsup to RELENG_6 or HEAD, you can get my changes, and if
you can try them out and let me know if you have any problems, I would
appreciate it.

Craig Rodrigues        
rodrigc at crodrigues.org

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