Re: [RFC PATCH] file as directory

[Al Viro]

On Wed, May 23, 2007 at 12:09:19PM +0200, Miklos Szeredi wrote:
> Right.  After locking vfsmount_lock, mount_dironfile() should recheck
> if there was a race and bail out.

Owww...  Not pretty, that...
 
> I don't think the filesystem ought to try _creating_ a vfsmount.  I
> imagine, that the fs has already a kernel-internal mounted for this
> kind of stuff, and it just supplies a dentry from that.  The vfsmount
> isn't actually important, but it should be readily available, and it's
> easier to clone from a vfsmount/dentry pair.

I don't get it.  What's the point of that exercise, then?  When do you
create that kernel-internal mount?

> As I said, the superblock should be persistent, so we'll get a stable
> st_dev for multiple mounts.

OK, but then I guess I don't understand the intended use.
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