RFC: should automounted file systems be exportable?

[Edward Tomasz Napierała]

On 0511T2217, Rick Macklem wrote:
> A recent bug was reported related to mountd and the
> "automounted" flag.
> 
> Loosely related to this is the question...
> Should automounted file systems be exportable?
> 
> I haven't tested it, but I suspect that it would be
> broken and the NFS server will reply NFSERR_STALE
> after the file system has been dismounted.
> 
> So, should I patch mountd so that it won't export
> automounted file systems?

Exporting an automounted filesystem doesn't seem to make much sense,
I agree, but I'm not sure if adding code to prevent it is such
a good idea.  If the user asks for it, by putting it into exports(5),
it's his fault; the only thing this code could add would be a more
friendly error message.