missing files in readdir(3) on NFS export of ZFS volume (since v28?)

[Rick Macklem]

> Hello,
> 
> I'm running a 9-current server as compiled on Sat Mar 5 02:17:14
> CET 2011.
> 
> Since I upgraded to ZFS v28 I noticed missing files from NFS. The
> files are still accessible through NFS but they don't show up on a
> readdir(3).
> 
Oh, I forgot to mention that the business related to VFS_VGET() only
applies to ReaddirPlus. If your client is using regular Readdir, then
I have no idea what it might be? (Assuming that is setting its file
system type to "zfs" so that the cookies don't have to be monotonically
increasing values.

rick