--- ./fs/nfs/inode.c.orig	2005-02-05 12:46:35.000000000 +0100
+++ ./fs/nfs/inode.c	2005-02-05 12:54:52.000000000 +0100
@@ -730,6 +730,7 @@
 {
 	struct inode *inode = dentry->d_inode;
 	struct nfs_fattr fattr;
+	struct rpc_groups fsg;
 	int error;
 
 	if (attr->ia_valid & ATTR_SIZE) {
@@ -750,7 +751,12 @@
 			filemap_fdatawait(inode->i_mapping);
 		nfs_wb_all(inode);
 	}
-	error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
+	fsg.ngroups = 0;
+	if (attr->ia_valid & ATTR_GID) {
+		fsg.ngroups = 1;
+		fsg.groups[0] = attr->ia_gid;
+	}
+	error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr, &fsg);
 	if (error == 0) {
 		nfs_refresh_inode(inode, &fattr);
 		if ((attr->ia_valid & ATTR_MODE) != 0) {
--- ./fs/nfs/proc.c.orig	2005-02-05 12:46:35.000000000 +0100
+++ ./fs/nfs/proc.c	2005-02-05 12:46:57.000000000 +0100
@@ -129,7 +129,7 @@
 
 static int
 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
-		 struct iattr *sattr)
+		 struct iattr *sattr, struct rpc_groups *fsg)
 {
 	struct inode *inode = dentry->d_inode;
 	struct nfs_sattrargs	arg = {
@@ -140,7 +140,7 @@
 
 	dprintk("NFS call  setattr\n");
 	fattr->valid = 0;
-	status = nfs2_rpc(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr);
+	status = nfs2_rpc(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, fsg);
 	dprintk("NFS reply setattr\n");
 	return status;
 }
--- ./fs/nfs/nfs3proc.c.orig	2005-02-05 12:46:35.000000000 +0100
+++ ./fs/nfs/nfs3proc.c	2005-02-05 12:46:57.000000000 +0100
@@ -113,7 +113,7 @@
 
 static int
 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
-			struct iattr *sattr)
+			struct iattr *sattr, struct rpc_groups *fsg)
 {
 	struct inode *inode = dentry->d_inode;
 	struct nfs3_sattrargs	arg = {
@@ -124,7 +124,7 @@
 
 	dprintk("NFS call  setattr\n");
 	fattr->valid = 0;
-	status = nfs3_rpc(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr);
+	status = nfs3_rpc(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr, fsg);
 	dprintk("NFS reply setattr\n");
 	return status;
 }
--- ./fs/nfs/nfs4proc.c.orig	2005-02-05 12:46:35.000000000 +0100
+++ ./fs/nfs/nfs4proc.c	2005-02-05 12:46:57.000000000 +0100
@@ -1008,7 +1008,7 @@
  */
 static int
 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
-		  struct iattr *sattr)
+		  struct iattr *sattr, struct rpc_groups *fsg)
 {
 	struct inode *		inode = dentry->d_inode;
 	int			size_change = sattr->ia_valid & ATTR_SIZE;
--- ./include/linux/nfs_xdr.h.orig	2005-02-05 12:46:35.000000000 +0100
+++ ./include/linux/nfs_xdr.h	2005-02-05 12:46:57.000000000 +0100
@@ -672,7 +672,7 @@
 	int	(*getattr) (struct nfs_server *, struct nfs_fh *,
 			    struct nfs_fattr *);
 	int	(*setattr) (struct dentry *, struct nfs_fattr *,
-			    struct iattr *);
+			    struct iattr *, struct rpc_groups *);
 	int	(*lookup)  (struct inode *, struct qstr *, struct nfs_fh *,
 			    struct nfs_fattr *, struct rpc_groups *);
 	int	(*access)  (struct inode *, struct nfs_access_entry *);