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From: Andreas Dilger <adilger@turbolinux.com>
Message-Id: <200103140519.f2E5JD606622@webber.adilger.int>
Subject: Re: (struct dentry *)->vfsmnt;
In-Reply-To: <Pine.GSO.4.21.0103140010050.2506-100000@weyl.math.psu.edu> from
 Alexander Viro at "Mar 14, 2001 00:11:06 am"
To: Alexander Viro <viro@math.psu.edu>
Date: Tue, 13 Mar 2001 22:19:13 -0700 (MST)
CC: Linux kernel development list <linux-kernel@vger.kernel.org>,
        Linux FS development list <linux-fsdevel@vger.kernel.org>
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Al writes:
> > How about the first one?  The one that calls the "read_super" method.
> > AFAICT, only the first mount calls down to the FS anyways (the rest
> > is VFS internal).
> 
> And what should that be after
> 
> mount -t ext2 /dev/sda1 /mnt
> mount --bind /mnt /tmp/foo
> umount /mnt

Yes, I know you _can_ do all sorts of tricks like this, but most people
don't really do it.  In any case, I would be happy if I could even get
"/mnt" from the first mount.  If it comes to the point where I can get
that, then I will start to worry about "mount --bind".

This is to store in the ext2 on-disk superblock, which is currently always
(from dumpe2fs -h /dev/hdX):

Last mounted on:          <not available>

To be able to put _something_ there will suit my needs.

Cheers, Andreas
-- 
Andreas Dilger  \ "If a man ate a pound of pasta and a pound of antipasto,
                 \  would they cancel out, leaving him still hungry?"
http://www-mddsp.enel.ucalgary.ca/People/adilger/               -- Dogbert
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