In a few places on the server, I had to change code that looked like:

   if (rqstp->rq_vers == 3)
       /* NFSv3 behavior */
   else
       /* NFSv2 behavior */

to:

   if (rqstp->rq_vers > 2)
       /* NFSv3 behavior */
   else
       /* NFSv2 behavior */

so that we would get the NFSv3 behavior, not the NFSv2 behavior,
in NFSv4.  This patch collects all changes of this type.

--- old/fs/nfsd/nfsfh.c	Sun Aug 11 22:53:12 2002
+++ new/fs/nfsd/nfsfh.c	Sun Aug 11 22:53:33 2002
@@ -107,7 +107,7 @@ fh_verify(struct svc_rqst *rqstp, struct
 		int fsid = 0;
 
 		error = nfserr_stale;
-		if (rqstp->rq_vers == 3)
+		if (rqstp->rq_vers > 2)
 			error = nfserr_badhandle;
 
 		if (fh->fh_version == 1) {
@@ -171,7 +171,7 @@ fh_verify(struct svc_rqst *rqstp, struct
 		 * Look up the dentry using the NFS file handle.
 		 */
 		error = nfserr_stale;
-		if (rqstp->rq_vers == 3)
+		if (rqstp->rq_vers > 2)
 			error = nfserr_badhandle;
 
 		if (fh->fh_version != 1) {
--- old/fs/nfsd/vfs.c	Thu Aug  1 16:16:20 2002
+++ new/fs/nfsd/vfs.c	Sun Aug 11 22:53:33 2002
@@ -1401,7 +1401,7 @@ nfsd_readdir(struct svc_rqst *rqstp, str
 	eof = !cd.eob;
 
 	if (cd.offset) {
-		if (rqstp->rq_vers == 3)
+		if (rqstp->rq_vers > 2)
 			(void)xdr_encode_hyper(cd.offset, file.f_pos);
 		else
 			*cd.offset = htonl(file.f_pos);