Re: NFSv4 fsid=0 export still necessary?

["J. Bruce Fields" <bfields@fieldses.org>]

On Sat, Dec 03, 2011 at 11:51:19AM -0500, Steve Dickson wrote:
> No, the fsid=0 export option is no longer necessary to make v4
> exports compatible with v2/v3 exports. When the fsid option
> is not set, the default root is define as "/" which allows
> the v4 clients to mount the same exports as does the v2/v3 clients.
> 
> Now if you do not what "/" as your default root, you can
> set fsid to something like fsid=/export. This will
> change to default root to the /export directory which
> means your v4 clients will only be able to access exports
> under the /export directory. 

I actually have some old patches that allow you to use an alternate root
for all NFS versions; you'd do something like:

	/exports	*(ro, root)
	/exports/foo	*(rw)
	/exports/bar	*(rw)

and then a v2, v3, or v4 client would mount server:/foo or server:/bar.

But that was just a fun project, it wasn't clear to me whether anyone
wanted it particularly.

Also, that didn't seem like a great user interface.  I'd rather have
something like

	rootpath=/exports
	foo	*(rw)
	bar	*(rw)

Actually, as long as we were doing that I'd rather replace /etc/exports
entirely; maybe do something like

	[nfsd]
		rootpath=/exports
	[export "foo"]
		clients=*
		options=rw
	[exports "bar"]
		clients=*
		options=rw

And also use the same file for other nfsd parameters:

	[nfsd]
		versions=2,3,4,4.1
		threads=8
		rootpath=/exports
	[export "foo"]
		...

I don't know.

--b.