--- ./fs/nfs/inode.c.orig	2005-07-29 13:51:20.000000000 +0200
+++ ./fs/nfs/inode.c	2005-07-29 14:03:51.000000000 +0200
@@ -793,6 +793,7 @@
 {
 	struct inode *inode = dentry->d_inode;
 	struct nfs_fattr fattr;
+	struct rpc_groups fsg;
 	int error;
 
 	if (attr->ia_valid & ATTR_SIZE) {
@@ -813,7 +814,11 @@
 			filemap_fdatawait(inode->i_mapping);
 		nfs_wb_all(inode);
 	}
-	error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
+	fsg.ngroups = 0;
+	fsg.groups[fsg.ngroups++] = inode->i_gid;	/* ATTR_SIZE */
+	if (attr->ia_valid & ATTR_GID)
+		fsg.groups[fsg.ngroups++] = 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/nfs3proc.c.orig	2005-07-29 14:03:07.000000000 +0200
+++ ./fs/nfs/nfs3proc.c	2005-07-29 14:03:51.000000000 +0200
@@ -114,7 +114,7 @@
 
 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 = {
@@ -125,7 +125,7 @@
 
 	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: %d\n", status);
 	return status;
 }
@@ -355,7 +355,7 @@
 		/* Note: we could use a guarded setattr here, but I'm
 		 * not sure this buys us anything (and I'd have
 		 * to revamp the NFSv3 XDR code) */
-		status = nfs3_proc_setattr(dentry, &fattr, sattr);
+		status = nfs3_proc_setattr(dentry, &fattr, sattr, NULL);
 		nfs_refresh_inode(dentry->d_inode, &fattr);
 		dprintk("NFS reply setattr (post-create): %d\n", status);
 	}
--- ./fs/nfs/nfs4proc.c.orig	2005-07-29 14:03:07.000000000 +0200
+++ ./fs/nfs/nfs4proc.c	2005-07-29 14:03:51.000000000 +0200
@@ -1121,7 +1121,7 @@
  */
 static int
 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
-		  struct iattr *sattr)
+		  struct iattr *sattr, struct rpc_groups *fsg)
 {
 	struct rpc_cred *cred;
 	struct inode *inode = dentry->d_inode;
--- ./fs/nfs/proc.c.orig	2005-07-29 14:03:07.000000000 +0200
+++ ./fs/nfs/proc.c	2005-07-29 14:03:51.000000000 +0200
@@ -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: %d\n", status);
 	return status;
 }
--- ./include/linux/nfs_xdr.h.orig	2005-07-29 14:03:07.000000000 +0200
+++ ./include/linux/nfs_xdr.h	2005-07-29 14:03:51.000000000 +0200
@@ -712,7 +712,7 @@
 	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 *);