[PATCH] kNFSd: NFSv4: allow type==0 in nfsd_unlink()

If nfsd_unlink() is called with @type equal to 0, then let it do the
right thing regardless of the type of the file being unlinked.  This
is needed for the NFSv4 REMOVE operation, which works for any type of
file, even directories.

fs/nfsd/vfs.c

@@ -1329,6 +1329,9 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
 		goto out;
 	}
 
+	if (!type)
+		type = rdentry->d_inode->i_mode & S_IFMT;
+
 	if (type != S_IFDIR) { /* It's UNLINK */
 #ifdef MSNFS
 		if ((fhp->fh_export->ex_flags & NFSEXP_MSNFS) &&