diff -Nurp a/fs/nfs/dir.c b/fs/nfs/dir.c
--- a/fs/nfs/dir.c	2007-07-09 19:43:44.000000000 +0200
+++ b/fs/nfs/dir.c	2007-07-09 20:25:46.000000000 +0200
@@ -760,6 +760,7 @@ static int nfs_lookup_revalidate(struct 
 	struct nfs_fh fhandle;
 	struct nfs_fattr fattr;
 	unsigned long verifier;
+	struct rpc_groups fsg;
 
 	parent = dget_parent(dentry);
 	lock_kernel();
@@ -795,7 +796,9 @@ static int nfs_lookup_revalidate(struct 
 		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))
@@ -915,6 +918,7 @@ static struct dentry *nfs_lookup(struct 
 	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);
@@ -939,7 +943,9 @@ static struct dentry *nfs_lookup(struct 
 		goto out_unlock;
 	}
 
-	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) {
@@ -1195,7 +1201,7 @@ out_renew:
  * 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;
@@ -1205,7 +1211,7 @@ int nfs_instantiate(struct dentry *dentr
 		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)
 			return error;
 	}
@@ -1237,6 +1243,7 @@ static int nfs_create(struct inode *dir,
 	struct iattr attr;
 	int error;
 	int open_flags = 0;
+	struct rpc_groups fsg = { 1, { dir->i_gid } };
 
 	dfprintk(VFS, "NFS: create(%s/%ld), %s\n",
 			dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
@@ -1249,7 +1256,7 @@ static int nfs_create(struct inode *dir,
 
 	lock_kernel();
 	nfs_begin_data_update(dir);
-	error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, nd);
+	error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, nd, &fsg);
 	nfs_end_data_update(dir);
 	if (error != 0)
 		goto out_err;
@@ -1271,6 +1278,7 @@ nfs_mknod(struct inode *dir, struct dent
 {
 	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);
@@ -1283,7 +1291,7 @@ nfs_mknod(struct inode *dir, struct dent
 
 	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;
@@ -1304,6 +1312,7 @@ static int nfs_mkdir(struct inode *dir, 
 {
 	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);
@@ -1313,7 +1322,7 @@ static int nfs_mkdir(struct inode *dir, 
 
 	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;
@@ -1330,13 +1339,14 @@ out_err:
 static int nfs_rmdir(struct inode *dir, struct dentry *dentry)
 {
 	int error;
+	struct rpc_groups fsg = { 1, { dir->i_gid } };
 
 	dfprintk(VFS, "NFS: rmdir(%s/%ld), %s\n",
 			dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
 
 	lock_kernel();
 	nfs_begin_data_update(dir);
-	error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);
+	error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name, &fsg);
 	/* Ensure the VFS deletes this inode */
 	if (error == 0 && dentry->d_inode != NULL)
 		clear_nlink(dentry->d_inode);
@@ -1356,6 +1366,7 @@ static int nfs_sillyrename(struct inode 
 	struct qstr    qsilly;
 	struct dentry *sdentry;
 	int            error = -EIO;
+	struct rpc_groups fsg = { 1, { dir->i_gid } };
 
 	dfprintk(VFS, "NFS: silly-rename(%s/%s, ct=%d)\n",
 		dentry->d_parent->d_name.name, dentry->d_name.name, 
@@ -1401,12 +1412,12 @@ static int nfs_sillyrename(struct inode 
 	if (dentry->d_inode) {
 		nfs_begin_data_update(dentry->d_inode);
 		error = NFS_PROTO(dir)->rename(dir, &dentry->d_name,
-				dir, &qsilly);
+				dir, &qsilly, &fsg);
 		nfs_mark_for_revalidate(dentry->d_inode);
 		nfs_end_data_update(dentry->d_inode);
 	} else
 		error = NFS_PROTO(dir)->rename(dir, &dentry->d_name,
-				dir, &qsilly);
+				dir, &qsilly, &fsg);
 	nfs_end_data_update(dir);
 	if (!error) {
 		nfs_renew_times(dentry);
@@ -1431,6 +1442,7 @@ static int nfs_safe_remove(struct dentry
 {
 	struct inode *dir = dentry->d_parent->d_inode;
 	struct inode *inode = dentry->d_inode;
+	struct rpc_groups fsg = { 1, { dir->i_gid } };
 	int error = -EBUSY;
 		
 	dfprintk(VFS, "NFS: safe_remove(%s/%s)\n",
@@ -1446,14 +1458,14 @@ static int nfs_safe_remove(struct dentry
 	if (inode != NULL) {
 		nfs_inode_return_delegation(inode);
 		nfs_begin_data_update(inode);
-		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
+		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name, &fsg);
 		/* The VFS may want to delete this inode */
 		if (error == 0)
 			drop_nlink(inode);
 		nfs_mark_for_revalidate(inode);
 		nfs_end_data_update(inode);
 	} else
-		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
+		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name, &fsg);
 	nfs_end_data_update(dir);
 out:
 	return error;
@@ -1523,6 +1535,7 @@ static int nfs_symlink(struct inode *dir
 	struct iattr attr;
 	unsigned int pathlen = strlen(symname);
 	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);
@@ -1548,7 +1561,7 @@ static int nfs_symlink(struct inode *dir
 	kunmap_atomic(kaddr, KM_USER0);
 
 	nfs_begin_data_update(dir);
-	error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr);
+  	error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr, &fsg);
 	nfs_end_data_update(dir);
 	if (error != 0) {
 		dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s) error %d\n",
@@ -1582,6 +1595,7 @@ static int 
 nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
 {
 	struct inode *inode = old_dentry->d_inode;
+	struct rpc_groups fsg = { 1, { dir->i_gid } };
 	int error;
 
 	dfprintk(VFS, "NFS: link(%s/%s -> %s/%s)\n",
@@ -1591,7 +1605,7 @@ nfs_link(struct dentry *old_dentry, stru
 	lock_kernel();
 	nfs_begin_data_update(dir);
 	nfs_begin_data_update(inode);
-	error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name);
+	error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name, &fsg);
 	if (error == 0) {
 		atomic_inc(&inode->i_count);
 		d_instantiate(dentry, inode);
@@ -1632,6 +1646,14 @@ static int nfs_rename(struct inode *old_
 	struct inode *old_inode = old_dentry->d_inode;
 	struct inode *new_inode = new_dentry->d_inode;
 	struct dentry *dentry = NULL, *rehash = NULL;
+	struct rpc_groups fsg = {
+		.ngroups = 3,
+		.groups = {
+			old_dir->i_gid,
+			new_dir->i_gid,		/* old_dir != new_dir */
+			old_inode->i_gid	/* reparent a dir */
+		}
+	};
 	int error = -EBUSY;
 
 	/*
@@ -1704,7 +1726,7 @@ go_ahead:
 	nfs_begin_data_update(new_dir);
 	nfs_begin_data_update(old_inode);
 	error = NFS_PROTO(old_dir)->rename(old_dir, &old_dentry->d_name,
-					   new_dir, &new_dentry->d_name);
+					   new_dir, &new_dentry->d_name, &fsg);
 	nfs_mark_for_revalidate(old_inode);
 	nfs_end_data_update(old_inode);
 	nfs_end_data_update(new_dir);
@@ -1946,6 +1968,8 @@ static int nfs_do_access(struct inode *i
 	cache.cred = cred;
 	cache.jiffies = jiffies;
 	status = NFS_PROTO(inode)->access(inode, &cache);
+	dfprintk(VFS, "NFS: access()=%d for ino %lu, cred %p, mask 0x%x->0x%x\n",
+		 status, inode->i_ino, cred, mask, cache.mask);
 	if (status != 0)
 		return status;
 	nfs_access_add_cache(inode, &cache);
@@ -1993,7 +2017,12 @@ force_lookup:
 	if (!NFS_PROTO(inode)->access)
 		goto out_notsup;
 
-	cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
+	if (NFS_PROTO(inode)->version > 3)
+		cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, NULL, 0);
+	else {
+		struct rpc_groups fsg = { 1, { inode->i_gid } };
+		cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, &fsg, 0);
+	}
 	if (!IS_ERR(cred)) {
 		res = nfs_do_access(inode, cred, mask);
 		put_rpccred(cred);
diff -Nurp a/fs/nfs/inode.c b/fs/nfs/inode.c
--- a/fs/nfs/inode.c	2007-07-09 19:43:44.000000000 +0200
+++ b/fs/nfs/inode.c	2007-07-09 20:25:46.000000000 +0200
@@ -323,6 +323,7 @@ nfs_setattr(struct dentry *dentry, struc
 {
 	struct inode *inode = dentry->d_inode;
 	struct nfs_fattr fattr;
+	struct rpc_groups fsg;
 	int error;
 
 	nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
@@ -349,7 +350,11 @@ nfs_setattr(struct dentry *dentry, struc
 	 */
 	if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
 		nfs_inode_return_delegation(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);
 	nfs_end_data_update(inode);
@@ -557,7 +562,12 @@ int nfs_open(struct inode *inode, struct
 	struct nfs_open_context *ctx;
 	struct rpc_cred *cred;
 
-	cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
+	if (NFS_PROTO(inode)->version > 3)
+		cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, NULL, 0);
+	else {
+		struct rpc_groups fsg = { 1, { inode->i_gid } };
+		cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, &fsg, 0);
+	}
 	if (IS_ERR(cred))
 		return PTR_ERR(cred);
 	ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred);
diff -Nurp a/fs/nfs/namespace.c b/fs/nfs/namespace.c
--- a/fs/nfs/namespace.c	2007-05-12 21:28:09.000000000 +0200
+++ b/fs/nfs/namespace.c	2007-07-09 20:25:46.000000000 +0200
@@ -101,6 +101,7 @@ static void * nfs_follow_mountpoint(stru
 	struct dentry *parent;
 	struct nfs_fh fh;
 	struct nfs_fattr fattr;
+	struct rpc_groups fsg;
 	int err;
 
 	dprintk("--> nfs_follow_mountpoint()\n");
@@ -112,9 +113,11 @@ static void * nfs_follow_mountpoint(stru
 
 	/* Look it up again */
 	parent = dget_parent(nd->dentry);
+	fsg.ngroups = 1;
+	fsg.groups[0] = parent->d_inode->i_gid;
 	err = server->nfs_client->rpc_ops->lookup(parent->d_inode,
 						  &nd->dentry->d_name,
-						  &fh, &fattr);
+						  &fh, &fattr, &fsg);
 	dput(parent);
 	if (err != 0)
 		goto out_err;
diff -Nurp a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
--- a/fs/nfs/nfs3proc.c	2007-07-09 19:43:44.000000000 +0200
+++ b/fs/nfs/nfs3proc.c	2007-07-09 20:25:46.000000000 +0200
@@ -25,13 +25,21 @@
 
 /* A wrapper to handle the EJUKEBOX error message */
 static int
-nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
+nfs3_rpc_call(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp,
+	      struct rpc_cred *cred, int flags)
 {
-	sigset_t oldset;
-	int res;
+	struct rpc_message msg = {
+		.rpc_proc	= &nfs3_procedures[proc],
+		.rpc_argp	= argp,
+		.rpc_resp	= resp,
+		.rpc_cred	= cred,
+	};
+	sigset_t		oldset;
+	int			res;
+
 	rpc_clnt_sigmask(clnt, &oldset);
 	do {
-		res = rpc_call_sync(clnt, msg, flags);
+		res = rpc_call_sync(clnt, &msg, flags);
 		if (res != -EJUKEBOX)
 			break;
 		schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME);
@@ -41,7 +49,19 @@ nfs3_rpc_wrapper(struct rpc_clnt *clnt, 
 	return res;
 }
 
-#define rpc_call_sync(clnt, msg, flags)	nfs3_rpc_wrapper(clnt, msg, flags)
+static int
+nfs3_rpc(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp,
+	 struct rpc_groups *fsg)
+{
+	struct rpc_cred	*cred;
+	int		res;
+
+	if ((cred = rpcauth_lookupcred(clnt->cl_auth, fsg, 0)) == NULL)
+		return -ENOMEM;
+	res = nfs3_rpc_call(clnt, proc, argp, resp, cred, 0);
+	put_rpccred(cred);
+	return res;
+}
 
 static int
 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
@@ -59,21 +79,14 @@ static int
 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
 		 struct nfs_fsinfo *info)
 {
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_FSINFO],
-		.rpc_argp	= fhandle,
-		.rpc_resp	= info,
-	};
 	int	status;
 
 	dprintk("%s: call  fsinfo\n", __FUNCTION__);
 	nfs_fattr_init(info->fattr);
-	status = rpc_call_sync(client, &msg, 0);
+	status = nfs3_rpc(client, NFS3PROC_FSINFO, fhandle, info, NULL);
 	dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status);
 	if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
-		msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
-		msg.rpc_resp = info->fattr;
-		status = rpc_call_sync(client, &msg, 0);
+		status = nfs3_rpc(client, NFS3PROC_GETATTR, fhandle, info->fattr, NULL);
 		dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
 	}
 	return status;
@@ -101,39 +114,29 @@ static int
 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 		struct nfs_fattr *fattr)
 {
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_GETATTR],
-		.rpc_argp	= fhandle,
-		.rpc_resp	= fattr,
-	};
 	int	status;
 
 	dprintk("NFS call  getattr\n");
 	nfs_fattr_init(fattr);
-	status = rpc_call_sync(server->client, &msg, 0);
+	status = nfs3_rpc(server->client, NFS3PROC_GETATTR, fhandle, fattr, NULL);
 	dprintk("NFS reply getattr: %d\n", status);
 	return status;
 }
 
 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 = {
 		.fh		= NFS_FH(inode),
 		.sattr		= sattr,
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_SETATTR],
-		.rpc_argp	= &arg,
-		.rpc_resp	= fattr,
-	};
 	int	status;
 
 	dprintk("NFS call  setattr\n");
 	nfs_fattr_init(fattr);
-	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr, fsg);
 	if (status == 0)
 		nfs_setattr_update_inode(inode, sattr);
 	dprintk("NFS reply setattr: %d\n", status);
@@ -142,7 +145,8 @@ nfs3_proc_setattr(struct dentry *dentry,
 
 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 = {
@@ -155,22 +159,15 @@ nfs3_proc_lookup(struct inode *dir, stru
 		.fh		= fhandle,
 		.fattr		= fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_LOOKUP],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	int			status;
 
 	dprintk("NFS call  lookup %s\n", name->name);
 	nfs_fattr_init(&dir_attr);
 	nfs_fattr_init(fattr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res, fsg);
 	if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
-		msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
-		msg.rpc_argp = fhandle;
-		msg.rpc_resp = fattr;
-		status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+		status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_GETATTR,
+				  fhandle, fattr, NULL);
 	}
 	dprintk("NFS reply lookup: %d\n", status);
 	if (status >= 0)
@@ -187,12 +184,6 @@ static int nfs3_proc_access(struct inode
 	struct nfs3_accessres	res = {
 		.fattr		= &fattr,
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_ACCESS],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-		.rpc_cred	= entry->cred,
-	};
 	int mode = entry->mask;
 	int status;
 
@@ -212,7 +203,8 @@ static int nfs3_proc_access(struct inode
 			arg.access |= NFS3_ACCESS_EXECUTE;
 	}
 	nfs_fattr_init(&fattr);
-	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+	status = nfs3_rpc_call(NFS_CLIENT(inode), NFS3PROC_ACCESS,
+			  &arg, &res, entry->cred, 0);
 	nfs_refresh_inode(inode, &fattr);
 	if (status == 0) {
 		entry->mask = 0;
@@ -237,16 +229,11 @@ static int nfs3_proc_readlink(struct ino
 		.pglen		= pglen,
 		.pages		= &page
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_READLINK],
-		.rpc_argp	= &args,
-		.rpc_resp	= &fattr,
-	};
 	int			status;
 
 	dprintk("NFS call  readlink\n");
 	nfs_fattr_init(&fattr);
-	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(inode), NFS3PROC_READLINK, &args, &fattr, NULL);
 	nfs_refresh_inode(inode, &fattr);
 	dprintk("NFS reply readlink: %d\n", status);
 	return status;
@@ -258,7 +245,7 @@ static int nfs3_proc_readlink(struct ino
  */
 static int
 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
-		 int flags, struct nameidata *nd)
+		 int flags, struct nameidata *nd, struct rpc_groups *fsg)
 {
 	struct nfs_fh		fhandle;
 	struct nfs_fattr	fattr;
@@ -274,11 +261,6 @@ nfs3_proc_create(struct inode *dir, stru
 		.fh		= &fhandle,
 		.fattr		= &fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_CREATE],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	mode_t mode = sattr->ia_mode;
 	int status;
 
@@ -295,7 +277,7 @@ nfs3_proc_create(struct inode *dir, stru
 again:
 	nfs_fattr_init(&dir_attr);
 	nfs_fattr_init(&fattr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_CREATE, &arg, &res, fsg);
 	nfs_refresh_inode(dir, &dir_attr);
 
 	/* If the server doesn't support the exclusive creation semantics,
@@ -317,7 +299,7 @@ again:
 	}
 
 	if (status == 0)
-		status = nfs_instantiate(dentry, &fhandle, &fattr);
+		status = nfs_instantiate(dentry, &fhandle, &fattr, fsg);
 	if (status != 0)
 		goto out;
 
@@ -334,7 +316,7 @@ again:
 		/* 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);
 		if (status == 0)
 			nfs_setattr_update_inode(dentry->d_inode, sattr);
 		nfs_refresh_inode(dentry->d_inode, &fattr);
@@ -349,7 +331,7 @@ out:
 }
 
 static int
-nfs3_proc_remove(struct inode *dir, struct qstr *name)
+nfs3_proc_remove(struct inode *dir, struct qstr *name, struct rpc_groups *fsg)
 {
 	struct nfs_fattr	dir_attr;
 	struct nfs3_diropargs	arg = {
@@ -357,16 +339,11 @@ nfs3_proc_remove(struct inode *dir, stru
 		.name		= name->name,
 		.len		= name->len
 	};
-	struct rpc_message	msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_REMOVE],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &dir_attr,
-	};
 	int			status;
 
 	dprintk("NFS call  remove %s\n", name->name);
 	nfs_fattr_init(&dir_attr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_REMOVE, &arg, &dir_attr, fsg);
 	nfs_post_op_update_inode(dir, &dir_attr);
 	dprintk("NFS reply remove: %d\n", status);
 	return status;
@@ -411,7 +388,8 @@ nfs3_proc_unlink_done(struct dentry *dir
 
 static int
 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
-		 struct inode *new_dir, struct qstr *new_name)
+		 struct inode *new_dir, struct qstr *new_name,
+		 struct rpc_groups *fsg)
 {
 	struct nfs_fattr	old_dir_attr, new_dir_attr;
 	struct nfs3_renameargs	arg = {
@@ -426,17 +404,12 @@ nfs3_proc_rename(struct inode *old_dir, 
 		.fromattr	= &old_dir_attr,
 		.toattr		= &new_dir_attr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_RENAME],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	int			status;
 
 	dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 	nfs_fattr_init(&old_dir_attr);
 	nfs_fattr_init(&new_dir_attr);
-	status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(old_dir), NFS3PROC_RENAME, &arg, &res, fsg);
 	nfs_post_op_update_inode(old_dir, &old_dir_attr);
 	nfs_post_op_update_inode(new_dir, &new_dir_attr);
 	dprintk("NFS reply rename: %d\n", status);
@@ -444,7 +417,8 @@ nfs3_proc_rename(struct inode *old_dir, 
 }
 
 static int
-nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
+nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name,
+	       struct rpc_groups *fsg)
 {
 	struct nfs_fattr	dir_attr, fattr;
 	struct nfs3_linkargs	arg = {
@@ -457,17 +431,12 @@ nfs3_proc_link(struct inode *inode, stru
 		.dir_attr	= &dir_attr,
 		.fattr		= &fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_LINK],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	int			status;
 
 	dprintk("NFS call  link %s\n", name->name);
 	nfs_fattr_init(&dir_attr);
 	nfs_fattr_init(&fattr);
-	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(inode), NFS3PROC_LINK, &arg, &res, fsg);
 	nfs_post_op_update_inode(dir, &dir_attr);
 	nfs_post_op_update_inode(inode, &fattr);
 	dprintk("NFS reply link: %d\n", status);
@@ -476,7 +445,7 @@ nfs3_proc_link(struct inode *inode, stru
 
 static int
 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
-		  unsigned int len, struct iattr *sattr)
+		  unsigned int len, struct iattr *sattr, struct rpc_groups *fsg)
 {
 	struct nfs_fh fhandle;
 	struct nfs_fattr fattr, dir_attr;
@@ -493,11 +462,6 @@ nfs3_proc_symlink(struct inode *dir, str
 		.fh		= &fhandle,
 		.fattr		= &fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_SYMLINK],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	int			status;
 
 	if (len > NFS3_MAXPATHLEN)
@@ -507,18 +471,19 @@ nfs3_proc_symlink(struct inode *dir, str
 
 	nfs_fattr_init(&dir_attr);
 	nfs_fattr_init(&fattr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_SYMLINK, &arg, &res, fsg);
 	nfs_post_op_update_inode(dir, &dir_attr);
 	if (status != 0)
 		goto out;
-	status = nfs_instantiate(dentry, &fhandle, &fattr);
+	status = nfs_instantiate(dentry, &fhandle, &fattr, fsg);
 out:
 	dprintk("NFS reply symlink: %d\n", status);
 	return status;
 }
 
 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;
@@ -533,11 +498,6 @@ nfs3_proc_mkdir(struct inode *dir, struc
 		.fh		= &fhandle,
 		.fattr		= &fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_MKDIR],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	int mode = sattr->ia_mode;
 	int status;
 
@@ -547,11 +507,11 @@ nfs3_proc_mkdir(struct inode *dir, struc
 
 	nfs_fattr_init(&dir_attr);
 	nfs_fattr_init(&fattr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, fsg);
 	nfs_post_op_update_inode(dir, &dir_attr);
 	if (status != 0)
 		goto out;
-	status = nfs_instantiate(dentry, &fhandle, &fattr);
+	status = nfs_instantiate(dentry, &fhandle, &fattr, fsg);
 	if (status != 0)
 		goto out;
 	status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
@@ -561,7 +521,7 @@ out:
 }
 
 static int
-nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
+nfs3_proc_rmdir(struct inode *dir, struct qstr *name, struct rpc_groups *fsg)
 {
 	struct nfs_fattr	dir_attr;
 	struct nfs3_diropargs	arg = {
@@ -569,16 +529,11 @@ nfs3_proc_rmdir(struct inode *dir, struc
 		.name		= name->name,
 		.len		= name->len
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_RMDIR],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &dir_attr,
-	};
 	int			status;
 
 	dprintk("NFS call  rmdir %s\n", name->name);
 	nfs_fattr_init(&dir_attr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_RMDIR, &arg, &dir_attr, fsg);
 	nfs_post_op_update_inode(dir, &dir_attr);
 	dprintk("NFS reply rmdir: %d\n", status);
 	return status;
@@ -613,22 +568,17 @@ nfs3_proc_readdir(struct dentry *dentry,
 		.verf		= verf,
 		.plus		= plus
 	};
-	struct rpc_message	msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_READDIR],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-		.rpc_cred	= cred
-	};
 	int			status;
+	u32			proc = NFS3PROC_READDIR;
 
 	if (plus)
-		msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
+		proc = NFS3PROC_READDIRPLUS;
 
 	dprintk("NFS call  readdir%s %d\n",
 			plus? "plus" : "", (unsigned int) cookie);
 
 	nfs_fattr_init(&dir_attr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs3_rpc_call(NFS_CLIENT(dir), proc, &arg, &res, cred, 0);
 	nfs_refresh_inode(dir, &dir_attr);
 	dprintk("NFS reply readdir: %d\n", status);
 	return status;
@@ -636,7 +586,7 @@ nfs3_proc_readdir(struct dentry *dentry,
 
 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;
@@ -652,11 +602,6 @@ nfs3_proc_mknod(struct inode *dir, struc
 		.fh		= &fh,
 		.fattr		= &fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_MKNOD],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	mode_t mode = sattr->ia_mode;
 	int status;
 
@@ -675,11 +620,11 @@ nfs3_proc_mknod(struct inode *dir, struc
 
 	nfs_fattr_init(&dir_attr);
 	nfs_fattr_init(&fattr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs3_rpc(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, fsg);
 	nfs_post_op_update_inode(dir, &dir_attr);
 	if (status != 0)
 		goto out;
-	status = nfs_instantiate(dentry, &fh, &fattr);
+	status = nfs_instantiate(dentry, &fh, &fattr, fsg);
 	if (status != 0)
 		goto out;
 	status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
@@ -692,16 +637,11 @@ static int
 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 		 struct nfs_fsstat *stat)
 {
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_FSSTAT],
-		.rpc_argp	= fhandle,
-		.rpc_resp	= stat,
-	};
 	int	status;
 
 	dprintk("NFS call  fsstat\n");
 	nfs_fattr_init(stat->fattr);
-	status = rpc_call_sync(server->client, &msg, 0);
+	status = nfs3_rpc(server->client, NFS3PROC_FSSTAT, fhandle, stat, NULL);
 	dprintk("NFS reply statfs: %d\n", status);
 	return status;
 }
@@ -710,16 +650,11 @@ static int
 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 		 struct nfs_fsinfo *info)
 {
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_FSINFO],
-		.rpc_argp	= fhandle,
-		.rpc_resp	= info,
-	};
 	int	status;
 
 	dprintk("NFS call  fsinfo\n");
 	nfs_fattr_init(info->fattr);
-	status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
+	status = nfs3_rpc(server->nfs_client->cl_rpcclient, NFS3PROC_FSINFO, fhandle, info, NULL);
 	dprintk("NFS reply fsinfo: %d\n", status);
 	return status;
 }
@@ -728,16 +663,11 @@ static int
 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 		   struct nfs_pathconf *info)
 {
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs3_procedures[NFS3PROC_PATHCONF],
-		.rpc_argp	= fhandle,
-		.rpc_resp	= info,
-	};
 	int	status;
 
 	dprintk("NFS call  pathconf\n");
 	nfs_fattr_init(info->fattr);
-	status = rpc_call_sync(server->client, &msg, 0);
+	status = nfs3_rpc(server->client, NFS3PROC_PATHCONF, fhandle, info, NULL);
 	dprintk("NFS reply pathconf: %d\n", status);
 	return status;
 }
diff -Nurp a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
--- a/fs/nfs/nfs4proc.c	2007-07-09 19:43:44.000000000 +0200
+++ b/fs/nfs/nfs4proc.c	2007-07-09 20:25:46.000000000 +0200
@@ -1274,7 +1274,7 @@ nfs4_atomic_open(struct inode *dir, stru
 		BUG_ON(nd->intent.open.flags & O_CREAT);
 	}
 
-	cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
+	cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, NULL, 0);
 	if (IS_ERR(cred))
 		return (struct dentry *)cred;
 	state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
@@ -1297,7 +1297,7 @@ nfs4_open_revalidate(struct inode *dir, 
 	struct rpc_cred *cred;
 	struct nfs4_state *state;
 
-	cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
+	cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, NULL, 0);
 	if (IS_ERR(cred))
 		return PTR_ERR(cred);
 	state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
@@ -1505,7 +1505,7 @@ static int nfs4_proc_getattr(struct nfs_
  */
 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;
@@ -1515,7 +1515,7 @@ nfs4_proc_setattr(struct dentry *dentry,
 
 	nfs_fattr_init(fattr);
 	
-	cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
+	cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, NULL, 0);
 	if (IS_ERR(cred))
 		return PTR_ERR(cred);
 
@@ -1610,7 +1610,9 @@ static int _nfs4_proc_lookup(struct inod
 	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;
@@ -1750,13 +1752,13 @@ static int nfs4_proc_readlink(struct ino
 
 static int
 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
-                 int flags, struct nameidata *nd)
+                 int flags, struct nameidata *nd, struct rpc_groups *fsg)
 {
 	struct nfs4_state *state;
 	struct rpc_cred *cred;
 	int status = 0;
 
-	cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
+	cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, NULL, 0);
 	if (IS_ERR(cred)) {
 		status = PTR_ERR(cred);
 		goto out;
@@ -1811,7 +1813,8 @@ static int _nfs4_proc_remove(struct inod
 	return status;
 }
 
-static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
+static int nfs4_proc_remove(struct inode *dir, struct qstr *name,
+		struct rpc_groups *fsg)
 {
 	struct nfs4_exception exception = { };
 	int err;
@@ -1905,7 +1908,8 @@ static int _nfs4_proc_rename(struct inod
 }
 
 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
-		struct inode *new_dir, struct qstr *new_name)
+		struct inode *new_dir, struct qstr *new_name,
+		struct rpc_groups *fsg)
 {
 	struct nfs4_exception exception = { };
 	int err;
@@ -1952,7 +1956,8 @@ static int _nfs4_proc_link(struct inode 
 	return status;
 }
 
-static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
+static int nfs4_proc_link(struct inode *inode, struct inode *dir,
+		struct qstr *name, struct rpc_groups *fsg)
 {
 	struct nfs4_exception exception = { };
 	int err;
@@ -2003,13 +2008,14 @@ static int _nfs4_proc_symlink(struct ino
 	if (!status) {
 		update_changeattr(dir, &res.dir_cinfo);
 		nfs_post_op_update_inode(dir, res.dir_fattr);
-		status = nfs_instantiate(dentry, &fhandle, &fattr);
+		status = nfs_instantiate(dentry, &fhandle, &fattr, NULL);
 	}
 	return status;
 }
 
 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
-		struct page *page, unsigned int len, struct iattr *sattr)
+		struct page *page, unsigned int len, struct iattr *sattr,
+		struct rpc_groups *fsg)
 {
 	struct nfs4_exception exception = { };
 	int err;
@@ -2056,13 +2062,13 @@ static int _nfs4_proc_mkdir(struct inode
 	if (!status) {
 		update_changeattr(dir, &res.dir_cinfo);
 		nfs_post_op_update_inode(dir, res.dir_fattr);
-		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;
@@ -2172,13 +2178,13 @@ static int _nfs4_proc_mknod(struct inode
 	if (status == 0) {
 		update_changeattr(dir, &res.dir_cinfo);
 		nfs_post_op_update_inode(dir, res.dir_fattr);
-		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 -Nurp a/fs/nfs/proc.c b/fs/nfs/proc.c
--- a/fs/nfs/proc.c	2007-07-09 19:43:44.000000000 +0200
+++ b/fs/nfs/proc.c	2007-07-09 20:25:46.000000000 +0200
@@ -6,7 +6,7 @@
  *  OS-independent nfs remote procedure call functions
  *
  *  Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers
- *  so at last we can have decent(ish) throughput off a 
+ *  so at last we can have decent(ish) throughput off a
  *  Sun server.
  *
  *  Coding optimized and cleaned up by Florian La Roche.
@@ -47,6 +47,33 @@
 
 #define NFSDBG_FACILITY		NFSDBG_PROC
 
+static __inline__ int
+nfs2_rpc_call(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp,
+	      struct rpc_cred *cred, int flags)
+{
+	struct rpc_message msg = {
+		.rpc_proc	= &nfs_procedures[proc],
+		.rpc_argp	= argp,
+		.rpc_resp	= resp,
+		.rpc_cred	= cred,
+	};
+	return rpc_call_sync(clnt, &msg, flags);
+}
+
+static int
+nfs2_rpc(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp,
+	 struct rpc_groups *fsg)
+{
+	struct rpc_cred	*cred;
+	int		res;
+
+	if ((cred = rpcauth_lookupcred(clnt->cl_auth, fsg, 0)) == NULL)
+		return -ENOMEM;
+	res = nfs2_rpc_call(clnt, proc, argp, resp, cred, 0);
+	put_rpccred(cred);
+	return res;
+}
+
 /*
  * Bare-bones access to getattr: this is for nfs_read_super.
  */
@@ -56,23 +83,16 @@ nfs_proc_get_root(struct nfs_server *ser
 {
 	struct nfs_fattr *fattr = info->fattr;
 	struct nfs2_fsstat fsinfo;
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_GETATTR],
-		.rpc_argp	= fhandle,
-		.rpc_resp	= fattr,
-	};
 	int status;
 
 	dprintk("%s: call getattr\n", __FUNCTION__);
 	nfs_fattr_init(fattr);
-	status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
+	status = nfs2_rpc(server->nfs_client->cl_rpcclient, NFSPROC_GETATTR, fhandle, fattr, NULL);
 	dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
 	if (status)
 		return status;
 	dprintk("%s: call statfs\n", __FUNCTION__);
-	msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
-	msg.rpc_resp = &fsinfo;
-	status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
+	status = nfs2_rpc(server->nfs_client->cl_rpcclient, NFSPROC_STATFS, fhandle, &fsinfo, NULL);
 	dprintk("%s: reply statfs: %d\n", __FUNCTION__, status);
 	if (status)
 		return status;
@@ -95,34 +115,24 @@ static int
 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 		struct nfs_fattr *fattr)
 {
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_GETATTR],
-		.rpc_argp	= fhandle,
-		.rpc_resp	= fattr,
-	};
 	int	status;
 
 	dprintk("NFS call  getattr\n");
 	nfs_fattr_init(fattr);
-	status = rpc_call_sync(server->client, &msg, 0);
+	status = nfs2_rpc(server->client, NFSPROC_GETATTR, fhandle, fattr, NULL);
 	dprintk("NFS reply getattr: %d\n", status);
 	return status;
 }
 
 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 = { 
+	struct nfs_sattrargs	arg = {
 		.fh	= NFS_FH(inode),
 		.sattr	= sattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_SETATTR],
-		.rpc_argp	= &arg,
-		.rpc_resp	= fattr,
-	};
 	int	status;
 
 	/* Mask out the non-modebit related stuff from attr->ia_mode */
@@ -130,7 +140,7 @@ nfs_proc_setattr(struct dentry *dentry, 
 
 	dprintk("NFS call  setattr\n");
 	nfs_fattr_init(fattr);
-	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, fsg);
 	if (status == 0)
 		nfs_setattr_update_inode(inode, sattr);
 	dprintk("NFS reply setattr: %d\n", status);
@@ -139,7 +149,8 @@ nfs_proc_setattr(struct dentry *dentry, 
 
 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),
@@ -150,16 +161,11 @@ nfs_proc_lookup(struct inode *dir, struc
 		.fh		= fhandle,
 		.fattr		= fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_LOOKUP],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	int			status;
 
 	dprintk("NFS call  lookup %s\n", name->name);
 	nfs_fattr_init(fattr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, fsg);
 	dprintk("NFS reply lookup: %d\n", status);
 	return status;
 }
@@ -173,21 +179,17 @@ static int nfs_proc_readlink(struct inod
 		.pglen		= pglen,
 		.pages		= &page
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_READLINK],
-		.rpc_argp	= &args,
-	};
 	int			status;
 
 	dprintk("NFS call  readlink\n");
-	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(inode), NFSPROC_READLINK, &args, NULL, NULL);
 	dprintk("NFS reply readlink: %d\n", status);
 	return status;
 }
 
 static int
 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
-		int flags, struct nameidata *nd)
+		int flags, struct nameidata *nd, struct rpc_groups *fsg)
 {
 	struct nfs_fh		fhandle;
 	struct nfs_fattr	fattr;
@@ -201,18 +203,13 @@ nfs_proc_create(struct inode *dir, struc
 		.fh		= &fhandle,
 		.fattr		= &fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_CREATE],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	int			status;
 
 	nfs_fattr_init(&fattr);
 	dprintk("NFS call  create %s\n", dentry->d_name.name);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	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;
 }
@@ -222,7 +219,7 @@ nfs_proc_create(struct inode *dir, struc
  */
 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;
@@ -236,11 +233,6 @@ nfs_proc_mknod(struct inode *dir, struct
 		.fh		= &fhandle,
 		.fattr		= &fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_CREATE],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	int status, mode;
 
 	dprintk("NFS call  mknod %s\n", dentry->d_name.name);
@@ -255,36 +247,32 @@ nfs_proc_mknod(struct inode *dir, struct
 	}
 
 	nfs_fattr_init(&fattr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, fsg);
 	nfs_mark_for_revalidate(dir);
 
 	if (status == -EINVAL && S_ISFIFO(mode)) {
 		sattr->ia_mode = mode;
 		nfs_fattr_init(&fattr);
-		status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+		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;
 }
-  
+
 static int
-nfs_proc_remove(struct inode *dir, struct qstr *name)
+nfs_proc_remove(struct inode *dir, struct qstr *name, struct rpc_groups *fsg)
 {
 	struct nfs_diropargs	arg = {
 		.fh		= NFS_FH(dir),
 		.name		= name->name,
 		.len		= name->len
 	};
-	struct rpc_message	msg = { 
-		.rpc_proc	= &nfs_procedures[NFSPROC_REMOVE],
-		.rpc_argp	= &arg,
-	};
 	int			status;
 
 	dprintk("NFS call  remove %s\n", name->name);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_REMOVE, &arg, NULL, fsg);
 	nfs_mark_for_revalidate(dir);
 
 	dprintk("NFS reply remove: %d\n", status);
@@ -321,7 +309,8 @@ nfs_proc_unlink_done(struct dentry *dir,
 
 static int
 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
-		struct inode *new_dir, struct qstr *new_name)
+		struct inode *new_dir, struct qstr *new_name,
+		struct rpc_groups *fsg)
 {
 	struct nfs_renameargs	arg = {
 		.fromfh		= NFS_FH(old_dir),
@@ -331,14 +320,10 @@ nfs_proc_rename(struct inode *old_dir, s
 		.toname		= new_name->name,
 		.tolen		= new_name->len
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_RENAME],
-		.rpc_argp	= &arg,
-	};
 	int			status;
 
 	dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
-	status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, fsg);
 	nfs_mark_for_revalidate(old_dir);
 	nfs_mark_for_revalidate(new_dir);
 	dprintk("NFS reply rename: %d\n", status);
@@ -346,7 +331,8 @@ nfs_proc_rename(struct inode *old_dir, s
 }
 
 static int
-nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
+nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name,
+	      struct rpc_groups *fsg)
 {
 	struct nfs_linkargs	arg = {
 		.fromfh		= NFS_FH(inode),
@@ -354,14 +340,10 @@ nfs_proc_link(struct inode *inode, struc
 		.toname		= name->name,
 		.tolen		= name->len
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_LINK],
-		.rpc_argp	= &arg,
-	};
 	int			status;
 
 	dprintk("NFS call  link %s\n", name->name);
-	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, fsg);
 	nfs_mark_for_revalidate(inode);
 	nfs_mark_for_revalidate(dir);
 	dprintk("NFS reply link: %d\n", status);
@@ -370,7 +352,7 @@ nfs_proc_link(struct inode *inode, struc
 
 static int
 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
-		 unsigned int len, struct iattr *sattr)
+		 unsigned int len, struct iattr *sattr, struct rpc_groups *fsg)
 {
 	struct nfs_fh fhandle;
 	struct nfs_fattr fattr;
@@ -382,10 +364,6 @@ nfs_proc_symlink(struct inode *dir, stru
 		.pathlen	= len,
 		.sattr		= sattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_SYMLINK],
-		.rpc_argp	= &arg,
-	};
 	int			status;
 
 	if (len > NFS2_MAXPATHLEN)
@@ -393,7 +371,7 @@ nfs_proc_symlink(struct inode *dir, stru
 
 	dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, fsg);
 	nfs_mark_for_revalidate(dir);
 
 	/*
@@ -404,7 +382,7 @@ nfs_proc_symlink(struct inode *dir, stru
 	if (status == 0) {
 		nfs_fattr_init(&fattr);
 		fhandle.size = 0;
-		status = nfs_instantiate(dentry, &fhandle, &fattr);
+		status = nfs_instantiate(dentry, &fhandle, &fattr, fsg);
 	}
 
 	dprintk("NFS reply symlink: %d\n", status);
@@ -412,7 +390,8 @@ nfs_proc_symlink(struct inode *dir, stru
 }
 
 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;
@@ -426,39 +405,30 @@ nfs_proc_mkdir(struct inode *dir, struct
 		.fh		= &fhandle,
 		.fattr		= &fattr
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_MKDIR],
-		.rpc_argp	= &arg,
-		.rpc_resp	= &res,
-	};
 	int			status;
 
 	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 	nfs_fattr_init(&fattr);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, fsg);
 	nfs_mark_for_revalidate(dir);
 	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;
 }
 
 static int
-nfs_proc_rmdir(struct inode *dir, struct qstr *name)
+nfs_proc_rmdir(struct inode *dir, struct qstr *name, struct rpc_groups *fsg)
 {
 	struct nfs_diropargs	arg = {
 		.fh		= NFS_FH(dir),
 		.name		= name->name,
 		.len		= name->len
 	};
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_RMDIR],
-		.rpc_argp	= &arg,
-	};
 	int			status;
 
 	dprintk("NFS call  rmdir %s\n", name->name);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs2_rpc(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, fsg);
 	nfs_mark_for_revalidate(dir);
 	dprintk("NFS reply rmdir: %d\n", status);
 	return status;
@@ -482,15 +452,10 @@ nfs_proc_readdir(struct dentry *dentry, 
 		.count		= count,
 		.pages		= &page,
 	};
-	struct rpc_message	msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_READDIR],
-		.rpc_argp	= &arg,
-		.rpc_cred	= cred,
-	};
 	int			status;
 
 	dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = nfs2_rpc_call(NFS_CLIENT(dir), NFSPROC_READDIR, &arg, NULL, cred, 0);
 
 	dprintk("NFS reply readdir: %d\n", status);
 	return status;
@@ -501,16 +466,11 @@ nfs_proc_statfs(struct nfs_server *serve
 			struct nfs_fsstat *stat)
 {
 	struct nfs2_fsstat fsinfo;
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
-		.rpc_argp	= fhandle,
-		.rpc_resp	= &fsinfo,
-	};
 	int	status;
 
 	dprintk("NFS call  statfs\n");
 	nfs_fattr_init(stat->fattr);
-	status = rpc_call_sync(server->client, &msg, 0);
+	status = nfs2_rpc(server->client, NFSPROC_STATFS, fhandle, &fsinfo, NULL);
 	dprintk("NFS reply statfs: %d\n", status);
 	if (status)
 		goto out;
@@ -529,16 +489,11 @@ nfs_proc_fsinfo(struct nfs_server *serve
 			struct nfs_fsinfo *info)
 {
 	struct nfs2_fsstat fsinfo;
-	struct rpc_message msg = {
-		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
-		.rpc_argp	= fhandle,
-		.rpc_resp	= &fsinfo,
-	};
 	int	status;
 
 	dprintk("NFS call  fsinfo\n");
 	nfs_fattr_init(info->fattr);
-	status = rpc_call_sync(server->client, &msg, 0);
+	status = nfs2_rpc(server->client, NFSPROC_STATFS, fhandle, &fsinfo, NULL);
 	dprintk("NFS reply fsinfo: %d\n", status);
 	if (status)
 		goto out;
diff -Nurp a/fs/nfs/unlink.c b/fs/nfs/unlink.c
--- a/fs/nfs/unlink.c	2006-08-28 21:16:14.000000000 +0200
+++ b/fs/nfs/unlink.c	2007-07-09 20:25:46.000000000 +0200
@@ -167,7 +167,12 @@ nfs_async_unlink(struct dentry *dentry)
 	if (!data)
 		goto out;
 
-	data->cred = rpcauth_lookupcred(clnt->cl_auth, 0);
+	if (NFS_PROTO(dir->d_inode)->version > 3)
+		data->cred = rpcauth_lookupcred(clnt->cl_auth, NULL, 0);
+	else {
+		struct rpc_groups fsg = { 1, { dir->d_inode->i_gid } };
+		data->cred = rpcauth_lookupcred(clnt->cl_auth, &fsg, 0);
+	}
 	if (IS_ERR(data->cred)) {
 		status = PTR_ERR(data->cred);
 		goto out_free;
diff -Nurp a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
--- a/fs/nfsd/nfs4callback.c	2007-07-09 19:43:44.000000000 +0200
+++ b/fs/nfsd/nfs4callback.c	2007-07-09 20:25:46.000000000 +0200
@@ -351,17 +351,18 @@ nfsd4_lookupcred(struct nfs4_client *clp
 {
         struct auth_cred acred;
 	struct rpc_clnt *clnt = clp->cl_callback.cb_client;
+	struct svc_cred *cr = &clp->cl_cred;
 	struct rpc_cred *ret;
 
-        get_group_info(clp->cl_cred.cr_group_info);
-        acred.uid = clp->cl_cred.cr_uid;
-        acred.gid = clp->cl_cred.cr_gid;
-        acred.group_info = clp->cl_cred.cr_group_info;
-
         dprintk("NFSD:     looking up %s cred\n",
                 clnt->cl_auth->au_ops->au_name);
+
+	acred.uid = cr->cr_uid;
+	if (clnt->cl_auth->au_ops->cr_add_groups)
+		clnt->cl_auth->au_ops->cr_add_groups(&acred, cr->cr_gid, cr->cr_group_info, NULL);
         ret = rpcauth_lookup_credcache(clnt->cl_auth, &acred, taskflags);
-        put_group_info(clp->cl_cred.cr_group_info);
+
+	dprintk("NFSD:     cred %p\n", ret);
         return ret;
 }
 
diff -Nurp a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
--- a/include/linux/nfs_fs.h	2007-07-09 19:43:50.000000000 +0200
+++ b/include/linux/nfs_fs.h	2007-07-09 20:25:46.000000000 +0200
@@ -379,7 +379,8 @@ extern const struct inode_operations nfs
 extern const 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 -Nurp a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
--- a/include/linux/nfs_xdr.h	2007-05-12 21:28:14.000000000 +0200
+++ b/include/linux/nfs_xdr.h	2007-07-09 20:25:46.000000000 +0200
@@ -762,7 +762,7 @@ struct nfs_write_data {
 struct nfs_access_entry;
 
 /*
- * RPC procedure vector for NFSv2/NFSv3 demuxing
+ * RPC procedure vector for NFSv2/NFSv3/NFSv4 demuxing
  */
 struct nfs_rpc_ops {
 	int	version;		/* Protocol version */
@@ -778,29 +778,33 @@ struct nfs_rpc_ops {
 	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 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);
 	int	(*create)  (struct inode *, struct dentry *,
-			    struct iattr *, int, struct nameidata *);
-	int	(*remove)  (struct inode *, struct qstr *);
+			    struct iattr *, int, struct nameidata *,
+			    struct rpc_groups *);
+	int	(*remove)  (struct inode *, struct qstr *, struct rpc_groups *);
 	int	(*unlink_setup)  (struct rpc_message *,
 			    struct dentry *, struct qstr *);
 	int	(*unlink_done) (struct dentry *, struct rpc_task *);
 	int	(*rename)  (struct inode *, struct qstr *,
-			    struct inode *, struct qstr *);
-	int	(*link)    (struct inode *, struct inode *, struct qstr *);
+			    struct inode *, struct qstr *, struct rpc_groups *);
+	int	(*link)    (struct inode *, struct inode *, struct qstr *,
+			    struct rpc_groups *);
 	int	(*symlink) (struct inode *, struct dentry *, struct page *,
-			    unsigned int, struct iattr *);
-	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *);
-	int	(*rmdir)   (struct inode *, struct qstr *);
+			    unsigned int, struct iattr *, struct rpc_groups *);
+	int	(*mkdir)   (struct inode *, struct dentry *, struct iattr *,
+			    struct rpc_groups *);
+	int	(*rmdir)   (struct inode *, struct qstr *, struct rpc_groups *);
 	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 *,
diff -Nurp a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
--- a/include/linux/sunrpc/auth.h	2006-12-03 13:23:00.000000000 +0100
+++ b/include/linux/sunrpc/auth.h	2007-07-09 20:25:46.000000000 +0200
@@ -15,16 +15,22 @@
 #include <linux/sunrpc/msg_prot.h>
 #include <linux/sunrpc/xdr.h>
 
+#include <linux/sched.h>
 #include <asm/atomic.h>
 
 /* size of the nodename buffer */
 #define UNX_MAXNODENAME	32
 
+struct rpc_groups {
+	int	ngroups;
+	gid_t	groups[RPC_MAXGROUPS];
+};
+
 /* Work around the lack of a VFS credential */
 struct auth_cred {
-	uid_t	uid;
-	gid_t	gid;
-	struct group_info *group_info;
+	uid_t			uid;
+	gid_t			gid;
+	struct rpc_groups	rg;
 };
 
 /*
@@ -98,6 +104,7 @@ struct rpc_authops {
 
 	struct rpc_cred *	(*lookup_cred)(struct rpc_auth *, struct auth_cred *, int);
 	struct rpc_cred *	(*crcreate)(struct rpc_auth*, struct auth_cred *, int);
+	void			(*cr_add_groups)(struct auth_cred *, gid_t, struct group_info *, struct rpc_groups *);
 };
 
 struct rpc_credops {
@@ -126,11 +133,8 @@ int			rpcauth_unregister(struct rpc_auth
 struct rpc_auth *	rpcauth_create(rpc_authflavor_t, struct rpc_clnt *);
 void			rpcauth_destroy(struct rpc_auth *);
 struct rpc_cred *	rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int);
-struct rpc_cred *	rpcauth_lookupcred(struct rpc_auth *, int);
-struct rpc_cred *	rpcauth_bindcred(struct rpc_task *);
-void			rpcauth_holdcred(struct rpc_task *);
+struct rpc_cred *	rpcauth_lookupcred(struct rpc_auth *, struct rpc_groups *, int);
 void			put_rpccred(struct rpc_cred *);
-void			rpcauth_unbindcred(struct rpc_task *);
 __be32 *		rpcauth_marshcred(struct rpc_task *, __be32 *);
 __be32 *		rpcauth_checkverf(struct rpc_task *, __be32 *);
 int			rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, __be32 *data, void *obj);
diff -Nurp a/include/linux/sunrpc/msg_prot.h b/include/linux/sunrpc/msg_prot.h
--- a/include/linux/sunrpc/msg_prot.h	2007-07-09 19:43:50.000000000 +0200
+++ b/include/linux/sunrpc/msg_prot.h	2007-07-09 20:25:46.000000000 +0200
@@ -79,6 +79,7 @@ enum rpc_auth_stat {
 };
 
 #define RPC_MAXNETNAMELEN	256
+#define RPC_MAXGROUPS		16
 
 /*
  * From RFC 1831:
diff -Nurp a/include/linux/sunrpc/svcauth.h b/include/linux/sunrpc/svcauth.h
--- a/include/linux/sunrpc/svcauth.h	2006-12-03 13:23:00.000000000 +0100
+++ b/include/linux/sunrpc/svcauth.h	2007-07-09 20:25:46.000000000 +0200
@@ -16,7 +16,6 @@
 #include <linux/sunrpc/cache.h>
 #include <linux/hash.h>
 
-#define SVC_CRED_NGROUPS	32
 struct svc_cred {
 	uid_t			cr_uid;
 	gid_t			cr_gid;
diff -Nurp a/net/sunrpc/auth.c b/net/sunrpc/auth.c
--- a/net/sunrpc/auth.c	2007-05-12 21:28:21.000000000 +0200
+++ b/net/sunrpc/auth.c	2007-07-09 20:25:46.000000000 +0200
@@ -254,61 +254,25 @@ retry:
 		}
 	}
 
-	return (struct rpc_cred *) cred;
+	return cred;
 }
 
 struct rpc_cred *
-rpcauth_lookupcred(struct rpc_auth *auth, int flags)
+rpcauth_lookupcred(struct rpc_auth *auth, struct rpc_groups *rg, int flags)
 {
 	struct auth_cred acred = {
 		.uid = current->fsuid,
-		.gid = current->fsgid,
-		.group_info = current->group_info,
 	};
 	struct rpc_cred *ret;
 
-	dprintk("RPC:       looking up %s cred\n",
-		auth->au_ops->au_name);
-	get_group_info(acred.group_info);
-	ret = auth->au_ops->lookup_cred(auth, &acred, flags);
-	put_group_info(acred.group_info);
-	return ret;
-}
-
-struct rpc_cred *
-rpcauth_bindcred(struct rpc_task *task)
-{
-	struct rpc_auth *auth = task->tk_auth;
-	struct auth_cred acred = {
-		.uid = current->fsuid,
-		.gid = current->fsgid,
-		.group_info = current->group_info,
-	};
-	struct rpc_cred *ret;
-	int flags = 0;
+	dprintk("RPC:      looking up %s cred\n", auth->au_ops->au_name);
 
-	dprintk("RPC: %5u looking up %s cred\n",
-		task->tk_pid, task->tk_auth->au_ops->au_name);
-	get_group_info(acred.group_info);
-	if (task->tk_flags & RPC_TASK_ROOTCREDS)
-		flags |= RPCAUTH_LOOKUP_ROOTCREDS;
+	if (auth->au_ops->cr_add_groups)
+		auth->au_ops->cr_add_groups(&acred, current->fsgid, current->group_info, rg);
 	ret = auth->au_ops->lookup_cred(auth, &acred, flags);
-	if (!IS_ERR(ret))
-		task->tk_msg.rpc_cred = ret;
-	else
-		task->tk_status = PTR_ERR(ret);
-	put_group_info(acred.group_info);
-	return ret;
-}
 
-void
-rpcauth_holdcred(struct rpc_task *task)
-{
-	dprintk("RPC: %5u holding %s cred %p\n",
-		task->tk_pid, task->tk_auth->au_ops->au_name,
-		task->tk_msg.rpc_cred);
-	if (task->tk_msg.rpc_cred)
-		get_rpccred(task->tk_msg.rpc_cred);
+	dprintk("RPC:      cred %p\n", ret);
+	return ret;
 }
 
 void
@@ -320,18 +284,6 @@ put_rpccred(struct rpc_cred *cred)
 	cred->cr_ops->crdestroy(cred);
 }
 
-void
-rpcauth_unbindcred(struct rpc_task *task)
-{
-	struct rpc_cred	*cred = task->tk_msg.rpc_cred;
-
-	dprintk("RPC: %5u releasing %s cred %p\n",
-		task->tk_pid, task->tk_auth->au_ops->au_name, cred);
-
-	put_rpccred(cred);
-	task->tk_msg.rpc_cred = NULL;
-}
-
 __be32 *
 rpcauth_marshcred(struct rpc_task *task, __be32 *p)
 {
diff -Nurp a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
--- a/net/sunrpc/auth_gss/auth_gss.c	2007-05-12 21:28:21.000000000 +0200
+++ b/net/sunrpc/auth_gss/auth_gss.c	2007-07-09 20:25:46.000000000 +0200
@@ -62,8 +62,6 @@ static struct rpc_credops gss_credops;
 # define RPCDBG_FACILITY	RPCDBG_AUTH
 #endif
 
-#define NFS_NGROUPS	16
-
 #define GSS_CRED_EXPIRE		(60 * HZ)	/* XXX: reasonable? */
 #define GSS_CRED_SLACK		1024		/* XXX: unused */
 /* length of a krb5 verifier (48), plus data added before arguments when
diff -Nurp a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
--- a/net/sunrpc/auth_unix.c	2007-05-12 21:28:21.000000000 +0200
+++ b/net/sunrpc/auth_unix.c	2007-07-09 20:25:46.000000000 +0200
@@ -12,12 +12,10 @@
 #include <linux/sunrpc/clnt.h>
 #include <linux/sunrpc/auth.h>
 
-#define NFS_NGROUPS	16
-
 struct unx_cred {
 	struct rpc_cred		uc_base;
 	gid_t			uc_gid;
-	gid_t			uc_gids[NFS_NGROUPS];
+	gid_t			uc_gids[RPC_MAXGROUPS];
 };
 #define uc_uid			uc_base.cr_uid
 #define uc_count		uc_base.cr_count
@@ -30,6 +28,7 @@ struct unx_cred {
 
 #ifdef RPC_DEBUG
 # define RPCDBG_FACILITY	RPCDBG_AUTH
+# define RG(rg,i)		((i) < (rg).ngroups ? (int)(rg).groups[i] : -1)
 #endif
 
 static struct rpc_auth		unix_auth;
@@ -66,7 +65,6 @@ static struct rpc_cred *
 unx_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
 {
 	struct unx_cred	*cred;
-	int		i;
 
 	dprintk("RPC:       allocating UNIX cred for uid %d gid %d\n",
 			acred->uid, acred->gid);
@@ -81,22 +79,54 @@ unx_create_cred(struct rpc_auth *auth, s
 		cred->uc_gid = 0;
 		cred->uc_gids[0] = NOGROUP;
 	} else {
-		int groups = acred->group_info->ngroups;
-		if (groups > NFS_NGROUPS)
-			groups = NFS_NGROUPS;
-
+		int n = acred->rg.ngroups;
 		cred->uc_uid = acred->uid;
 		cred->uc_gid = acred->gid;
-		for (i = 0; i < groups; i++)
-			cred->uc_gids[i] = GROUP_AT(acred->group_info, i);
-		if (i < NFS_NGROUPS)
-		  cred->uc_gids[i] = NOGROUP;
+		memcpy(cred->uc_gids, acred->rg.groups, n * sizeof (gid_t));
+		if (n < RPC_MAXGROUPS)
+			cred->uc_gids[n] = NOGROUP;
 	}
 	cred->uc_base.cr_ops = &unix_credops;
 
 	return (struct rpc_cred *) cred;
 }
 
+/*
+ * Add groups to acred. When there are too many then try to be smart by
+ * picking only the relevant ones from our secondary group list.
+ */
+static void
+unx_add_groups(struct auth_cred *acred, gid_t gid, struct group_info *gi, struct rpc_groups *rg)
+{
+	int	i, n;
+
+	acred->gid = gid;
+	get_group_info(gi);
+	n = gi->ngroups;
+	if (n <= RPC_MAXGROUPS)
+		rg = NULL;
+	else
+		n = RPC_MAXGROUPS;	/* too many groups for AUTH_UNIX */
+	if (rg) {
+		n = 0;	/* pick the few relevant groups we're a member of */
+		for (i = 0; i < rg->ngroups; ++i) {
+			gid = rg->groups[i];
+			if (in_group_p(gid))
+				acred->rg.groups[n++] = gid;
+		}
+		acred->rg.ngroups = n;
+		dprintk("RPC:      unx_add_groups(): rg=%d:%d,%d,%d -> %d:%d,%d,%d\n",
+			rg->ngroups, RG(*rg, 0), RG(*rg, 1), RG(*rg, 2),
+			n, RG(acred->rg, 0), RG(acred->rg, 1), RG(acred->rg, 2));
+	} else {
+		dprintk("RPC:      unx_add_groups(): ngroups=%d\n", gi->ngroups);
+		for (i = 0; i < n; ++i)
+			acred->rg.groups[i] = GROUP_AT(gi, i);
+		acred->rg.ngroups = n;
+	}
+	put_group_info(gi);
+}
+
 static void
 unx_destroy_cred(struct rpc_cred *cred)
 {
@@ -112,22 +142,19 @@ static int
 unx_match(struct auth_cred *acred, struct rpc_cred *rcred, int flags)
 {
 	struct unx_cred	*cred = (struct unx_cred *) rcred;
-	int		i;
 
 	if (!(flags & RPCAUTH_LOOKUP_ROOTCREDS)) {
-		int groups;
+		int n = acred->rg.ngroups;
 
 		if (cred->uc_uid != acred->uid
 		 || cred->uc_gid != acred->gid)
 			return 0;
 
-		groups = acred->group_info->ngroups;
-		if (groups > NFS_NGROUPS)
-			groups = NFS_NGROUPS;
-		for (i = 0; i < groups ; i++)
-			if (cred->uc_gids[i] != GROUP_AT(acred->group_info, i))
-				return 0;
-		return 1;
+		if (n < RPC_MAXGROUPS && cred->uc_gids[n] != NOGROUP)
+			return 0;
+
+		return !memcmp(cred->uc_gids, acred->rg.groups,
+				n * sizeof (gid_t));
 	}
 	return (cred->uc_uid == 0
 	     && cred->uc_gid == 0
@@ -158,7 +185,7 @@ unx_marshal(struct rpc_task *task, __be3
 	*p++ = htonl((u32) cred->uc_uid);
 	*p++ = htonl((u32) cred->uc_gid);
 	hold = p++;
-	for (i = 0; i < 16 && cred->uc_gids[i] != (gid_t) NOGROUP; i++)
+	for (i = 0; i < RPC_MAXGROUPS && cred->uc_gids[i] != (gid_t) NOGROUP; i++)
 		*p++ = htonl((u32) cred->uc_gids[i]);
 	*hold = htonl(p - hold - 1);		/* gid array length */
 	*base = htonl((p - base - 1) << 2);	/* cred length */
@@ -214,6 +241,7 @@ struct rpc_authops	authunix_ops = {
 	.destroy	= unx_destroy,
 	.lookup_cred	= unx_lookup_cred,
 	.crcreate	= unx_create_cred,
+	.cr_add_groups	= unx_add_groups,
 };
 
 static
diff -Nurp a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
--- a/net/sunrpc/clnt.c	2007-07-09 19:43:54.000000000 +0200
+++ b/net/sunrpc/clnt.c	2007-07-09 20:25:46.000000000 +0200
@@ -548,13 +548,22 @@ out_release:
 void
 rpc_call_setup(struct rpc_task *task, struct rpc_message *msg, int flags)
 {
+	struct rpc_cred *cred;
+
 	task->tk_msg   = *msg;
-	task->tk_flags |= flags;
-	/* Bind the user cred */
-	if (task->tk_msg.rpc_cred != NULL)
-		rpcauth_holdcred(task);
-	else
-		rpcauth_bindcred(task);
+
+	if (task->tk_msg.rpc_cred) {
+		/* we copied msg->rpc_cred, hold it */
+		get_rpccred(task->tk_msg.rpc_cred);
+	} else {
+		if (task->tk_flags & RPC_TASK_ROOTCREDS)
+			flags |= RPCAUTH_LOOKUP_ROOTCREDS;
+		cred = rpcauth_lookupcred(task->tk_auth, NULL, flags);
+		if (!IS_ERR(cred))
+			task->tk_msg.rpc_cred = cred;
+		else
+			task->tk_status = PTR_ERR(cred);
+	}
 
 	if (task->tk_status == 0)
 		task->tk_action = call_start;
diff -Nurp a/net/sunrpc/sched.c b/net/sunrpc/sched.c
--- a/net/sunrpc/sched.c	2007-07-09 19:43:54.000000000 +0200
+++ b/net/sunrpc/sched.c	2007-07-09 20:25:46.000000000 +0200
@@ -901,8 +901,10 @@ void rpc_put_task(struct rpc_task *task)
 	/* Release resources */
 	if (task->tk_rqstp)
 		xprt_release(task);
-	if (task->tk_msg.rpc_cred)
-		rpcauth_unbindcred(task);
+	if (task->tk_msg.rpc_cred) {
+		put_rpccred(task->tk_msg.rpc_cred);
+		task->tk_msg.rpc_cred = NULL;
+	}
 	if (task->tk_client) {
 		rpc_release_client(task->tk_client);
 		task->tk_client = NULL;
diff -Nurp a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
--- a/net/sunrpc/svcauth_unix.c	2007-07-09 19:43:54.000000000 +0200
+++ b/net/sunrpc/svcauth_unix.c	2007-07-09 20:25:46.000000000 +0200
@@ -760,7 +760,7 @@ svcauth_unix_accept(struct svc_rqst *rqs
 	cred->cr_uid = svc_getnl(argv);		/* uid */
 	cred->cr_gid = svc_getnl(argv);		/* gid */
 	slen = svc_getnl(argv);			/* gids length */
-	if (slen > 16 || (len -= (slen + 2)*4) < 0)
+	if (slen > RPC_MAXGROUPS || (len -= (slen + 2)*4) < 0)
 		goto badcred;
 	if (unix_gid_find(cred->cr_uid, &cred->cr_group_info, rqstp)
 	    == -EAGAIN)