diff -ru aa/fs/nfs/dir.c b/fs/nfs/dir.c
--- aa/fs/nfs/dir.c	2005-06-12 18:18:39.000000000 +0200
+++ b/fs/nfs/dir.c	2005-06-12 18:19:36.000000000 +0200
@@ -590,6 +590,7 @@
 	struct nfs_fh fhandle;
 	struct nfs_fattr fattr;
 	unsigned long verifier;
+	struct rpc_groups fsg;
 
 	parent = dget_parent(dentry);
 	lock_kernel();
@@ -623,7 +624,9 @@
 		goto out_bad;
 
 	verifier = nfs_save_change_attribute(dir);
-	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr);
+	fsg.ngroups = 1;
+	fsg.groups[0] = dir->i_gid;
+	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr, &fsg);
 	if (error)
 		goto out_bad;
 	if (nfs_compare_fh(NFS_FH(inode), &fhandle))
@@ -717,6 +720,7 @@
 	int error;
 	struct nfs_fh fhandle;
 	struct nfs_fattr fattr;
+	struct rpc_groups fsg;
 
 	dfprintk(VFS, "NFS: lookup(%s/%s)\n",
 		dentry->d_parent->d_name.name, dentry->d_name.name);
@@ -740,7 +744,9 @@
 	if (nfs_is_exclusive_create(dir, nd))
 		goto no_entry;
 
-	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr);
+	fsg.ngroups = 1;
+	fsg.groups[0] = dir->i_gid;
+	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr, &fsg);
 	if (error == -ENOENT)
 		goto no_entry;
 	if (error < 0) {
@@ -956,7 +962,7 @@
  * Code common to create, mkdir, and mknod.
  */
 int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle,
-				struct nfs_fattr *fattr)
+				struct nfs_fattr *fattr, struct rpc_groups *fsg)
 {
 	struct inode *inode;
 	int error = -EACCES;
@@ -966,7 +972,7 @@
 		return 0;
 	if (fhandle->size == 0) {
 		struct inode *dir = dentry->d_parent->d_inode;
-		error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);
+		error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, fsg);
 		if (error)
 			goto out_err;
 	}
@@ -1034,6 +1040,7 @@
 {
 	struct iattr attr;
 	int status;
+	struct rpc_groups fsg = { 1, { dir->i_gid } };
 
 	dfprintk(VFS, "NFS: mknod(%s/%ld, %s\n", dir->i_sb->s_id,
 		dir->i_ino, dentry->d_name.name);
@@ -1046,7 +1053,7 @@
 
 	lock_kernel();
 	nfs_begin_data_update(dir);
-	status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev);
+	status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev, &fsg);
 	nfs_end_data_update(dir);
 	if (status != 0)
 		goto out_err;
@@ -1067,6 +1074,7 @@
 {
 	struct iattr attr;
 	int error;
+	struct rpc_groups fsg = { 1, { dir->i_gid } };
 
 	dfprintk(VFS, "NFS: mkdir(%s/%ld, %s\n", dir->i_sb->s_id,
 		dir->i_ino, dentry->d_name.name);
@@ -1076,7 +1084,7 @@
 
 	lock_kernel();
 	nfs_begin_data_update(dir);
-	error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr);
+	error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr, &fsg);
 	nfs_end_data_update(dir);
 	if (error != 0)
 		goto out_err;
@@ -1267,6 +1275,7 @@
 	struct nfs_fh sym_fh;
 	struct qstr qsymname;
 	int error;
+	struct rpc_groups fsg = { 1, { dir->i_gid } };
 
 	dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s)\n", dir->i_sb->s_id,
 		dir->i_ino, dentry->d_name.name, symname);
@@ -1292,7 +1301,7 @@
 					  &attr, &sym_fh, &sym_attr);
 	nfs_end_data_update(dir);
 	if (!error) {
-		error = nfs_instantiate(dentry, &sym_fh, &sym_attr);
+		error = nfs_instantiate(dentry, &sym_fh, &sym_attr, &fsg);
 	} else {
 		if (error == -EEXIST)
 			printk("nfs_proc_symlink: %s/%s already exists??\n",
diff -ru aa/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
--- aa/fs/nfs/nfs3proc.c	2005-06-12 18:18:40.000000000 +0200
+++ b/fs/nfs/nfs3proc.c	2005-06-12 18:19:33.000000000 +0200
@@ -131,7 +131,8 @@
 
 static int
 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
-		 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+		 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
+		 struct rpc_groups *fsg)
 {
 	struct nfs_fattr	dir_attr;
 	struct nfs3_diropargs	arg = {
@@ -149,7 +150,7 @@
 	dprintk("NFS call  lookup %s\n", name->name);
 	dir_attr.valid = 0;
 	fattr->valid = 0;
-	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res, fsg);
 	if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR))
 		status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_GETATTR,
 				  fhandle, fattr);
@@ -333,7 +334,7 @@
 	}
 
 	if (status == 0)
-		status = nfs_instantiate(dentry, &fhandle, &fattr);
+		status = nfs_instantiate(dentry, &fhandle, &fattr, fsg);
 	if (status != 0)
 		goto out;
 
@@ -503,7 +504,8 @@
 }
 
 static int
-nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
+nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
+		struct rpc_groups *fsg)
 {
 	struct nfs_fh fhandle;
 	struct nfs_fattr fattr, dir_attr;
@@ -523,10 +525,10 @@
 	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 	dir_attr.valid = 0;
 	fattr.valid = 0;
-	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, fsg);
 	nfs_refresh_inode(dir, &dir_attr);
 	if (status == 0)
-		status = nfs_instantiate(dentry, &fhandle, &fattr);
+		status = nfs_instantiate(dentry, &fhandle, &fattr, fsg);
 	dprintk("NFS reply mkdir: %d\n", status);
 	return status;
 }
@@ -600,7 +602,7 @@
 
 static int
 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
-		dev_t rdev)
+		dev_t rdev, struct rpc_groups *fsg)
 {
 	struct nfs_fh fh;
 	struct nfs_fattr fattr, dir_attr;
@@ -630,10 +632,10 @@
 			MAJOR(rdev), MINOR(rdev));
 	dir_attr.valid = 0;
 	fattr.valid = 0;
-	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, fsg);
 	nfs_refresh_inode(dir, &dir_attr);
 	if (status == 0)
-		status = nfs_instantiate(dentry, &fh, &fattr);
+		status = nfs_instantiate(dentry, &fh, &fattr, fsg);
 	dprintk("NFS reply mknod: %d\n", status);
 	return status;
 }
diff -ru aa/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
--- aa/fs/nfs/nfs4proc.c	2005-06-12 18:18:40.000000000 +0200
+++ b/fs/nfs/nfs4proc.c	2005-06-12 18:19:33.000000000 +0200
@@ -1189,7 +1189,9 @@
 	return status;
 }
 
-static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
+		struct nfs_fh *fhandle, struct nfs_fattr *fattr,
+		struct rpc_groups *fsg)
 {
 	struct nfs4_exception exception = { };
 	int err;
@@ -1693,13 +1695,13 @@
 	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 	if (!status) {
 		update_changeattr(dir, &res.dir_cinfo);
-		status = nfs_instantiate(dentry, &fhandle, &fattr);
+		status = nfs_instantiate(dentry, &fhandle, &fattr, NULL);
 	}
 	return status;
 }
 
 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
-		struct iattr *sattr)
+		struct iattr *sattr, struct rpc_groups *fsg)
 {
 	struct nfs4_exception exception = { };
 	int err;
@@ -1803,13 +1805,13 @@
 	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 	if (status == 0) {
 		update_changeattr(dir, &res.dir_cinfo);
-		status = nfs_instantiate(dentry, &fh, &fattr);
+		status = nfs_instantiate(dentry, &fh, &fattr, NULL);
 	}
 	return status;
 }
 
 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
-		struct iattr *sattr, dev_t rdev)
+		struct iattr *sattr, dev_t rdev, struct rpc_groups *fsg)
 {
 	struct nfs4_exception exception = { };
 	int err;
diff -ru aa/fs/nfs/proc.c b/fs/nfs/proc.c
--- aa/fs/nfs/proc.c	2005-06-12 18:18:40.000000000 +0200
+++ b/fs/nfs/proc.c	2005-06-12 18:19:33.000000000 +0200
@@ -147,7 +147,8 @@
 
 static int
 nfs_proc_lookup(struct inode *dir, struct qstr *name,
-		struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+		struct nfs_fh *fhandle, struct nfs_fattr *fattr,
+		struct rpc_groups *fsg)
 {
 	struct nfs_diropargs	arg = {
 		.fh		= NFS_FH(dir),
@@ -162,7 +163,7 @@
 
 	dprintk("NFS call  lookup %s\n", name->name);
 	fattr->valid = 0;
-	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res);
+	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, fsg);
 	dprintk("NFS reply lookup: %d\n", status);
 	return status;
 }
@@ -251,7 +252,7 @@
 	dprintk("NFS call  create %s\n", dentry->d_name.name);
 	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, fsg);
 	if (status == 0)
-		status = nfs_instantiate(dentry, &fhandle, &fattr);
+		status = nfs_instantiate(dentry, &fhandle, &fattr, fsg);
 	dprintk("NFS reply create: %d\n", status);
 	return status;
 }
@@ -261,7 +262,7 @@
  */
 static int
 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
-	       dev_t rdev)
+	       dev_t rdev, struct rpc_groups *fsg)
 {
 	struct nfs_fh fhandle;
 	struct nfs_fattr fattr;
@@ -289,15 +290,15 @@
 	}
 
 	fattr.valid = 0;
-	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res);
+	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, fsg);
 
 	if (status == -EINVAL && S_ISFIFO(mode)) {
 		sattr->ia_mode = mode;
 		fattr.valid = 0;
-		status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res);
+		status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, fsg);
 	}
 	if (status == 0)
-		status = nfs_instantiate(dentry, &fhandle, &fattr);
+		status = nfs_instantiate(dentry, &fhandle, &fattr, fsg);
 	dprintk("NFS reply mknod: %d\n", status);
 	return status;
 }
@@ -408,7 +409,8 @@
 }
 
 static int
-nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
+nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
+	       struct rpc_groups *fsg)
 {
 	struct nfs_fh fhandle;
 	struct nfs_fattr fattr;
@@ -426,9 +428,9 @@
 
 	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 	fattr.valid = 0;
-	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res);
+	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, fsg);
 	if (status == 0)
-		status = nfs_instantiate(dentry, &fhandle, &fattr);
+		status = nfs_instantiate(dentry, &fhandle, &fattr, fsg);
 	dprintk("NFS reply mkdir: %d\n", status);
 	return status;
 }
diff -ru aa/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
--- aa/include/linux/nfs_fs.h	2005-06-12 18:18:40.000000000 +0200
+++ b/include/linux/nfs_fs.h	2005-06-12 18:19:25.000000000 +0200
@@ -345,7 +345,8 @@
 extern struct file_operations nfs_dir_operations;
 extern struct dentry_operations nfs_dentry_operations;
 
-extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
+extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh,
+			   struct nfs_fattr *fattr, struct rpc_groups *fsg);
 
 /*
  * linux/fs/nfs/symlink.c
diff -ru aa/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
--- aa/include/linux/nfs_xdr.h	2005-06-12 18:18:40.000000000 +0200
+++ b/include/linux/nfs_xdr.h	2005-06-12 18:19:33.000000000 +0200
@@ -674,8 +674,8 @@
 			    struct nfs_fattr *);
 	int	(*setattr) (struct dentry *, struct nfs_fattr *,
 			    struct iattr *);
-	int	(*lookup)  (struct inode *, struct qstr *,
-			    struct nfs_fh *, struct nfs_fattr *);
+	int	(*lookup)  (struct inode *, struct qstr *, struct nfs_fh *,
+			    struct nfs_fattr *, struct rpc_groups *);
 	int	(*access)  (struct inode *, struct nfs_access_entry *);
 	int	(*readlink)(struct inode *, struct page *, unsigned int,
 			    unsigned int);
@@ -694,12 +694,13 @@
 	int	(*symlink) (struct inode *, struct qstr *, struct qstr *,
 			    struct iattr *, struct nfs_fh *,
 			    struct nfs_fattr *);
-	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *);
+	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *,
+			    struct rpc_groups *);
 	int	(*rmdir)   (struct inode *, struct qstr *);
 	int	(*readdir) (struct dentry *, struct rpc_cred *,
 			    u64, struct page *, unsigned int, int);
 	int	(*mknod)   (struct inode *, struct dentry *, struct iattr *,
-			    dev_t);
+			    dev_t, struct rpc_groups *);
 	int	(*statfs)  (struct nfs_server *, struct nfs_fh *,
 			    struct nfs_fsstat *);
 	int	(*fsinfo)  (struct nfs_server *, struct nfs_fh *,