COMMAND
	    NFS
SYSTEMS AFFECTED
	    Those runnng NetApp NFS
PROBLEM
	    Dmitry Kohmanyuk  posted following.   It's only relevant to  those
	    using NetApp NFS  file servers.   There are 2  versions of NFS  in
	    town, v2 and v3.  In  v3, one of things introduced was  ability to
	    read names of files in directory with stat(2)ing them at the  same
	    time; the procedure name is readdirplus.  It can be used to  speed
	    up programs like ls(1).
	    Apparently, NFS code in FreeBSD 2.2 (derived from 4.4BSD code,  so
	    perhaps this  applies to  all of  modern BSD  systems here)  allow
	    client to specify this in mount options without using NFS v3. This
	    meaningless set of options panics NetApp file server.
SOLUTION
	    The following  simple patch  for /usr/src/sys/nfs/nfs_bio.c  fixes
	    this problem.
	
	    --- nfs_bio.c.ok        Wed Nov  5 20:11:17 1997
	    +++ nfs_bio.c   Wed Nov  5 20:14:06 1997
	    @@ -1031,6 +1031,8 @@
	                case VDIR:
	                    nfsstats.readdir_bios++;
	                    uiop->uio_offset = ((u_quad_t)bp->b_lblkno) * NFS_DIRBLKSIZ;
	    +               if (!(nmp->nm_flag & NFSMNT_NFSV3))
	    +                       nmp->nm_flag &= ~NFSMNT_RDIRPLUS;       /* [email protected] */
	                    if (nmp->nm_flag & NFSMNT_RDIRPLUS) {
	                            error = nfs_readdirplusrpc(vp, uiop, cr);
	                            if (error == NFSERR_NOTSUPP)