kern/43605: tmpfs file handles are broken

[pooka%iki.fi@localhost]

>Number:         43605
>Category:       kern
>Synopsis:       tmpfs file handles are broken
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jul 12 20:55:00 +0000 2010
>Originator:     Antti Kantee
>Release:        
>Organization:
>Environment:
>Description:
fhopen() fails with EINVAL on tmpfs (internally speaking, VFS_FHTOVP):

        if (tfh.tf_id >= tmp->tm_nodes_max)
                return EINVAL;

Seems like this was broken ~2.5years ago.   ... nobody noticing this
is funny, considering the fuss there was with the "critical"
importance of nfs export capability in tmpfs.
>How-To-Repeat:
i'll add an atf test soon (it's blocking on an infrastructure issue)
>Fix: