Merge branch 'labeled-nfs' into linux-next

* labeled-nfs:
NFS: Apply v4.1 capabilities to v4.2
NFS: Add in v4.2 callback operation
NFS: Make callbacks minor version generic
Kconfig: Add Kconfig entry for Labeled NFS V4 client
NFS: Extend NFS xattr handlers to accept the security namespace
NFS: Client implementation of Labeled-NFS
NFS: Add label lifecycle management
NFS:Add labels to client function prototypes
NFSv4: Extend fattr bitmaps to support all 3 words
NFSv4: Introduce new label structure
NFSv4: Add label recommended attribute and NFSv4 flags
NFSv4.2: Added NFS v4.2 support to the NFS client
SELinux: Add new labeling type native labels
LSM: Add flags field to security_sb_set_mnt_opts for in kernel mount data.
Security: Add Hook to test if the particular xattr is part of a MAC model.
Security: Add hook to calculate context based on a negative dentry.
NFS: Add NFSv4.2 protocol constants

Conflicts:
fs/nfs/nfs4proc.c

fs/nfs/Kconfig

···
 
 	  If unsure, say N.
 
+config NFS_V4_2
+	bool "NFS client support for NFSv4.2"
+	depends on NFS_V4_1
+	help
+	  This option enables support for minor version 2 of the NFSv4 protocol
+	  in the kernel's NFS client.
+
+	  If unsure, say N.
+
 config PNFS_FILE_LAYOUT
 	tristate
 	depends on NFS_V4_1
···
 	  name of the distribution.
 	  If the NFS client is unchanged from the upstream kernel, this
 	  option should be set to the default "kernel.org".
+
+config NFS_V4_SECURITY_LABEL
+	bool
+	depends on NFS_V4_2 && SECURITY
+	default y
 
 config ROOT_NFS
 	bool "Root file system on NFS"

fs/nfs/callback.c

···
 			ret = nfs4_callback_up_net(serv, net);
 			break;
 		case 1:
+		case 2:
 			ret = nfs41_callback_up_net(serv, net);
 			break;
 		default:

fs/nfs/callback.h

···
 	OP_CB_WANTS_CANCELLED = 12,
 	OP_CB_NOTIFY_LOCK   = 13,
 	OP_CB_NOTIFY_DEVICEID = 14,
+/* Callback operations new to NFSv4.2 */
+	OP_CB_OFFLOAD = 15,
 	OP_CB_ILLEGAL = 10044,
 };
 
···
 	__be32			drc_status;
 	struct nfs_client	*clp;
 	u32			slotid;
+	u32			minorversion;
 	struct net		*net;
 };
 

fs/nfs/callback_proc.c

···
 	int i;
 	__be32 status = htonl(NFS4ERR_BADSESSION);
 
-	clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, &args->csa_sessionid);
+	clp = nfs4_find_client_sessionid(cps->net, args->csa_addr,
+					 &args->csa_sessionid, cps->minorversion);
 	if (clp == NULL)
 		goto out;
 

fs/nfs/callback_xdr.c

···
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 	hdr->minorversion = ntohl(*p++);
-	/* Check minor version is zero or one. */
-	if (hdr->minorversion <= 1) {
-		hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 */
+	/* Check for minor version support */
+	if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) {
+		hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */
 	} else {
 		pr_warn_ratelimited("NFS: %s: NFSv4 server callback with "
 			"illegal minor version %u!\n",
···
 }
 #endif /* CONFIG_NFS_V4_1 */
 
+#ifdef CONFIG_NFS_V4_2
+static __be32
+preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op)
+{
+	__be32 status = preprocess_nfs41_op(nop, op_nr, op);
+	if (status != htonl(NFS4ERR_OP_ILLEGAL))
+		return status;
+
+	if (op_nr == OP_CB_OFFLOAD)
+		return htonl(NFS4ERR_NOTSUPP);
+	return htonl(NFS4ERR_OP_ILLEGAL);
+}
+#else /* CONFIG_NFS_V4_2 */
+static __be32
+preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op)
+{
+	return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
+}
+#endif /* CONFIG_NFS_V4_2 */
+
 static __be32
 preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op)
 {
···
 	return htonl(NFS_OK);
 }
 
-static __be32 process_op(uint32_t minorversion, int nop,
-		struct svc_rqst *rqstp,
+static __be32 process_op(int nop, struct svc_rqst *rqstp,
 		struct xdr_stream *xdr_in, void *argp,
 		struct xdr_stream *xdr_out, void *resp,
 		struct cb_process_state *cps)
···
 		return status;
 
 	dprintk("%s: minorversion=%d nop=%d op_nr=%u\n",
-		__func__, minorversion, nop, op_nr);
+		__func__, cps->minorversion, nop, op_nr);
 
-	status = minorversion ? preprocess_nfs41_op(nop, op_nr, &op) :
-				preprocess_nfs4_op(op_nr, &op);
+	switch (cps->minorversion) {
+	case 0:
+		status = preprocess_nfs4_op(op_nr, &op);
+		break;
+	case 1:
+		status = preprocess_nfs41_op(nop, op_nr, &op);
+		break;
+	case 2:
+		status = preprocess_nfs42_op(nop, op_nr, &op);
+		break;
+	default:
+		status = htonl(NFS4ERR_MINOR_VERS_MISMATCH);
+	}
+
 	if (status == htonl(NFS4ERR_OP_ILLEGAL))
 		op_nr = OP_CB_ILLEGAL;
 	if (status)
···
 			return rpc_drop_reply;
 	}
 
+	cps.minorversion = hdr_arg.minorversion;
 	hdr_res.taglen = hdr_arg.taglen;
 	hdr_res.tag = hdr_arg.tag;
 	if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0)
 		return rpc_system_err;
 
 	while (status == 0 && nops != hdr_arg.nops) {
-		status = process_op(hdr_arg.minorversion, nops, rqstp,
-				    &xdr_in, argp, &xdr_out, resp, &cps);
+		status = process_op(nops, rqstp, &xdr_in,
+				    argp, &xdr_out, resp, &cps);
 		nops++;
 	}
 

fs/nfs/client.c

···
 	}
 
 	if (!(fattr->valid & NFS_ATTR_FATTR)) {
-		error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr);
+		error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr, NULL);
 		if (error < 0) {
 			dprintk("nfs_create_server: getattr error = %d\n", -error);
 			goto error;

fs/nfs/dir.c

···
 	struct dentry *alias;
 	struct inode *dir = parent->d_inode;
 	struct inode *inode;
+	int status;
 
 	if (filename.name[0] == '.') {
 		if (filename.len == 1)
···
 	dentry = d_lookup(parent, &filename);
 	if (dentry != NULL) {
 		if (nfs_same_file(dentry, entry)) {
-			nfs_refresh_inode(dentry->d_inode, entry->fattr);
+			status = nfs_refresh_inode(dentry->d_inode, entry->fattr);
+			if (!status)
+				nfs_setsecurity(dentry->d_inode, entry->fattr, entry->label);
 			goto out;
 		} else {
 			if (d_invalidate(dentry) != 0)
···
 	if (dentry == NULL)
 		return;
 
-	inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr);
+	inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr, entry->label);
 	if (IS_ERR(inode))
 		goto out;
 
···
 	if (entry.fh == NULL || entry.fattr == NULL)
 		goto out;
 
+	entry.label = nfs4_label_alloc(NFS_SERVER(inode), GFP_NOWAIT);
+	if (IS_ERR(entry.label)) {
+		status = PTR_ERR(entry.label);
+		goto out;
+	}
+
 	array = nfs_readdir_get_array(page);
 	if (IS_ERR(array)) {
 		status = PTR_ERR(array);
-		goto out;
+		goto out_label_free;
 	}
 	memset(array, 0, sizeof(struct nfs_cache_array));
 	array->eof_index = -1;
···
 	nfs_readdir_free_large_page(pages_ptr, pages, array_size);
 out_release_array:
 	nfs_readdir_release_array(page);
+out_label_free:
+	nfs4_label_free(entry.label);
 out:
 	nfs_free_fattr(entry.fattr);
 	nfs_free_fhandle(entry.fh);
···
 	struct dentry *parent;
 	struct nfs_fh *fhandle = NULL;
 	struct nfs_fattr *fattr = NULL;
+	struct nfs4_label *label = NULL;
 	int error;
 
 	if (flags & LOOKUP_RCU)
···
 	if (fhandle == NULL || fattr == NULL)
 		goto out_error;
 
-	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);
+	label = nfs4_label_alloc(NFS_SERVER(inode), GFP_NOWAIT);
+	if (IS_ERR(label))
+		goto out_error;
+
+	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
 	if (error)
 		goto out_bad;
 	if (nfs_compare_fh(NFS_FH(inode), fhandle))
···
 	if ((error = nfs_refresh_inode(inode, fattr)) != 0)
 		goto out_bad;
 
+	nfs_setsecurity(inode, fattr, label);
+
 	nfs_free_fattr(fattr);
 	nfs_free_fhandle(fhandle);
+	nfs4_label_free(label);
+
 out_set_verifier:
 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
  out_valid:
···
  out_bad:
 	nfs_free_fattr(fattr);
 	nfs_free_fhandle(fhandle);
+	nfs4_label_free(label);
 	nfs_mark_for_revalidate(dir);
 	if (inode && S_ISDIR(inode->i_mode)) {
 		/* Purge readdir caches. */
···
 out_error:
 	nfs_free_fattr(fattr);
 	nfs_free_fhandle(fhandle);
+	nfs4_label_free(label);
 	dput(parent);
 	dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) lookup returned error %d\n",
 			__func__, dentry->d_parent->d_name.name,
···
 	struct inode *inode = NULL;
 	struct nfs_fh *fhandle = NULL;
 	struct nfs_fattr *fattr = NULL;
+	struct nfs4_label *label = NULL;
 	int error;
 
 	dfprintk(VFS, "NFS: lookup(%s/%s)\n",
···
 	if (fhandle == NULL || fattr == NULL)
 		goto out;
 
+	label = nfs4_label_alloc(NFS_SERVER(dir), GFP_NOWAIT);
+	if (IS_ERR(label))
+		goto out;
+
 	parent = dentry->d_parent;
 	/* Protect against concurrent sillydeletes */
 	nfs_block_sillyrename(parent);
-	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);
+	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
 	if (error == -ENOENT)
 		goto no_entry;
 	if (error < 0) {
 		res = ERR_PTR(error);
 		goto out_unblock_sillyrename;
 	}
-	inode = nfs_fhget(dentry->d_sb, fhandle, fattr);
+	inode = nfs_fhget(dentry->d_sb, fhandle, fattr, label);
 	res = ERR_CAST(inode);
 	if (IS_ERR(res))
 		goto out_unblock_sillyrename;
···
 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
 out_unblock_sillyrename:
 	nfs_unblock_sillyrename(parent);
+	nfs4_label_free(label);
 out:
 	nfs_free_fattr(fattr);
 	nfs_free_fhandle(fhandle);
···
  * 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 nfs4_label *label)
 {
 	struct dentry *parent = dget_parent(dentry);
 	struct inode *dir = parent->d_inode;
···
 	if (dentry->d_inode)
 		goto out;
 	if (fhandle->size == 0) {
-		error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);
+		error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, NULL);
 		if (error)
 			goto out_error;
 	}
 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
 	if (!(fattr->valid & NFS_ATTR_FATTR)) {
 		struct nfs_server *server = NFS_SB(dentry->d_sb);
-		error = server->nfs_client->rpc_ops->getattr(server, fhandle, fattr);
+		error = server->nfs_client->rpc_ops->getattr(server, fhandle, fattr, NULL);
 		if (error < 0)
 			goto out_error;
 	}
-	inode = nfs_fhget(dentry->d_sb, fhandle, fattr);
+	inode = nfs_fhget(dentry->d_sb, fhandle, fattr, label);
 	error = PTR_ERR(inode);
 	if (IS_ERR(inode))
 		goto out_error;

fs/nfs/getroot.c

···
 		goto out;
 	}
 
-	inode = nfs_fhget(sb, mntfh, fsinfo.fattr);
+	inode = nfs_fhget(sb, mntfh, fsinfo.fattr, NULL);
 	if (IS_ERR(inode)) {
 		dprintk("nfs_get_root: get root inode failed\n");
 		ret = ERR_CAST(inode);

fs/nfs/inode.c

···
 
 	memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
 	if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
-		nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
 		nfs_fscache_invalidate(inode);
-	} else {
-		nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
-	}
+		nfsi->cache_validity |= NFS_INO_INVALID_ATTR
+					| NFS_INO_INVALID_LABEL
+					| NFS_INO_INVALID_DATA
+					| NFS_INO_INVALID_ACCESS
+					| NFS_INO_INVALID_ACL
+					| NFS_INO_REVAL_PAGECACHE;
+	} else
+		nfsi->cache_validity |= NFS_INO_INVALID_ATTR
+					| NFS_INO_INVALID_LABEL
+					| NFS_INO_INVALID_ACCESS
+					| NFS_INO_INVALID_ACL
+					| NFS_INO_REVAL_PAGECACHE;
 }
 
 void nfs_zap_caches(struct inode *inode)
···
 	return 0;
 }
 
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
+					struct nfs4_label *label)
+{
+	int error;
+
+	if (label == NULL)
+		return;
+
+	if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL) == 0)
+		return;
+
+	if (NFS_SERVER(inode)->nfs_client->cl_minorversion < 2)
+		return;
+
+	if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
+		error = security_inode_notifysecctx(inode, label->label,
+				label->len);
+		if (error)
+			printk(KERN_ERR "%s() %s %d "
+					"security_inode_notifysecctx() %d\n",
+					__func__,
+					(char *)label->label,
+					label->len, error);
+	}
+}
+
+struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
+{
+	struct nfs4_label *label = NULL;
+	int minor_version = server->nfs_client->cl_minorversion;
+
+	if (minor_version < 2)
+		return label;
+
+	if (!(server->caps & NFS_CAP_SECURITY_LABEL))
+		return label;
+
+	label = kzalloc(sizeof(struct nfs4_label), flags);
+	if (label == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	label->label = kzalloc(NFS4_MAXLABELLEN, flags);
+	if (label->label == NULL) {
+		kfree(label);
+		return ERR_PTR(-ENOMEM);
+	}
+	label->len = NFS4_MAXLABELLEN;
+
+	return label;
+}
+EXPORT_SYMBOL_GPL(nfs4_label_alloc);
+#else
+void inline nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
+					struct nfs4_label *label)
+{
+}
+#endif
+EXPORT_SYMBOL_GPL(nfs_setsecurity);
+
 /*
  * This is our front-end to iget that looks up inodes by file handle
  * instead of inode number.
  */
 struct inode *
-nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
+nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label)
 {
 	struct nfs_find_desc desc = {
 		.fh	= fh,
···
 			 */
 			inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
 		}
+
+		nfs_setsecurity(inode, fattr, label);
+
 		nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
 		nfsi->attrtimeo_timestamp = now;
 		nfsi->access_cache = RB_ROOT;
···
 		unlock_new_inode(inode);
 	} else
 		nfs_refresh_inode(inode, fattr);
+		nfs_setsecurity(inode, fattr, label);
 	dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n",
 		inode->i_sb->s_id,
 		(long long)NFS_FILEID(inode),
···
 		NFS_PROTO(inode)->return_delegation(inode);
 	error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
 	if (error == 0)
-		nfs_refresh_inode(inode, fattr);
+		error = nfs_refresh_inode(inode, fattr);
 	nfs_free_fattr(fattr);
 out:
 	return error;
···
 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
 {
 	int		 status = -ESTALE;
+	struct nfs4_label *label = NULL;
 	struct nfs_fattr *fattr = NULL;
 	struct nfs_inode *nfsi = NFS_I(inode);
 
···
 		goto out;
 
 	nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
-	status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
+
+	label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
+	if (IS_ERR(label)) {
+		status = PTR_ERR(label);
+		goto out;
+	}
+
+	status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label);
 	if (status != 0) {
 		dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
 			 inode->i_sb->s_id,
···
 			if (!S_ISDIR(inode->i_mode))
 				set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
 		}
-		goto out;
+		goto err_out;
 	}
 
 	status = nfs_refresh_inode(inode, fattr);
···
 		dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
 			 inode->i_sb->s_id,
 			 (long long)NFS_FILEID(inode), status);
-		goto out;
+		goto err_out;
 	}
 
 	if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
···
 		inode->i_sb->s_id,
 		(long long)NFS_FILEID(inode));
 
- out:
+err_out:
+	nfs4_label_free(label);
+out:
 	nfs_free_fattr(fattr);
 	return status;
 }
···
  */
 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
 {
-	if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
+	if (!(NFS_I(inode)->cache_validity &
+			(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL))
 			&& !nfs_attribute_cache_expired(inode))
 		return NFS_STALE(inode) ? -ESTALE : 0;
 	return __nfs_revalidate_inode(server, inode);
···
 	spin_lock(&inode->i_lock);
 	status = nfs_post_op_update_inode_locked(inode, fattr);
 	spin_unlock(&inode->i_lock);
+
 	return status;
 }
 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
···
 		inode->i_blocks = fattr->du.nfs2.blocks;
 
 	/* Update attrtimeo value if we're out of the unstable period */
-	if (invalid & NFS_INO_INVALID_ATTR) {
+	if (invalid & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) {
 		nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
 		nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
 		nfsi->attrtimeo_timestamp = now;
···
 		}
 	}
 	invalid &= ~NFS_INO_INVALID_ATTR;
+	invalid &= ~NFS_INO_INVALID_LABEL;
 	/* Don't invalidate the data if we were to blame */
 	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
 				|| S_ISLNK(inode->i_mode)))

fs/nfs/internal.h

···
 extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
 extern struct nfs_client *
 nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
-				struct nfs4_sessionid *);
+				struct nfs4_sessionid *, u32);
 extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
 					struct nfs_subversion *);
 extern struct nfs_server *nfs4_create_server(

fs/nfs/namespace.c

···
 	struct dentry *parent = dget_parent(dentry);
 
 	/* Look it up again to get its attributes */
-	err = server->nfs_client->rpc_ops->lookup(parent->d_inode, &dentry->d_name, fh, fattr);
+	err = server->nfs_client->rpc_ops->lookup(parent->d_inode, &dentry->d_name, fh, fattr, NULL);
 	dput(parent);
 	if (err != 0)
 		return ERR_PTR(err);

fs/nfs/nfs3proc.c

···
  */
 static int
 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
-		struct nfs_fattr *fattr)
+		struct nfs_fattr *fattr, struct nfs4_label *label)
 {
 	struct rpc_message msg = {
 		.rpc_proc	= &nfs3_procedures[NFS3PROC_GETATTR],
···
 
 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 nfs4_label *label)
 {
 	struct nfs3_diropargs	arg = {
 		.fh		= NFS_FH(dir),
···
 	status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 	nfs_post_op_update_inode(dir, data->res.dir_attr);
 	if (status == 0)
-		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
+		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 	return status;
 }
 

fs/nfs/nfs4_fs.h

···
 extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
 
 extern const u32 nfs4_fattr_bitmap[3];
-extern const u32 nfs4_statfs_bitmap[2];
-extern const u32 nfs4_pathconf_bitmap[2];
+extern const u32 nfs4_statfs_bitmap[3];
+extern const u32 nfs4_pathconf_bitmap[3];
 extern const u32 nfs4_fsinfo_bitmap[3];
-extern const u32 nfs4_fs_locations_bitmap[2];
+extern const u32 nfs4_fs_locations_bitmap[3];
 
 void nfs4_free_client(struct nfs_client *);
 

fs/nfs/nfs4client.c

···
 	if (err)
 		goto error;
 
+	if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) {
+		err = -EINVAL;
+		goto error;
+	}
+
 	spin_lock_init(&clp->cl_lock);
 	INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
 	rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
···
  */
 struct nfs_client *
 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
-			   struct nfs4_sessionid *sid)
+			   struct nfs4_sessionid *sid, u32 minorversion)
 {
 	struct nfs_client *clp;
 	struct nfs_net *nn = net_generic(net, nfs_net_id);
 
 	spin_lock(&nn->nfs_client_lock);
 	list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
-		if (nfs4_cb_match_client(addr, clp, 1) == false)
+		if (nfs4_cb_match_client(addr, clp, minorversion) == false)
 			continue;
 
 		if (!nfs4_has_session(clp))
···
 
 struct nfs_client *
 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
-			   struct nfs4_sessionid *sid)
+			   struct nfs4_sessionid *sid, u32 minorversion)
 {
 	return NULL;
 }

fs/nfs/nfs4proc.c

···
 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
-static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
-static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
+static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
+static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
 			    struct nfs_fattr *fattr, struct iattr *sattr,
-			    struct nfs4_state *state);
+			    struct nfs4_state *state, struct nfs4_label *ilabel,
+			    struct nfs4_label *olabel);
 #ifdef CONFIG_NFS_V4_1
 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
 		struct rpc_cred *);
 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
 		struct rpc_cred *);
 #endif
+
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+static inline struct nfs4_label *
+nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
+	struct iattr *sattr, struct nfs4_label *label)
+{
+	int err;
+
+	if (label == NULL)
+		return NULL;
+
+	if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
+		return NULL;
+
+	if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
+		return NULL;
+
+	err = security_dentry_init_security(dentry, sattr->ia_mode,
+				&dentry->d_name, (void **)&label->label, &label->len);
+	if (err == 0)
+		return label;
+
+	return NULL;
+}
+static inline void
+nfs4_label_release_security(struct nfs4_label *label)
+{
+	if (label)
+		security_release_secctx(label->label, label->len);
+}
+static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
+{
+	if (label)
+		return server->attr_bitmask;
+
+	return server->attr_bitmask_nl;
+}
+#else
+static inline struct nfs4_label *
+nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
+	struct iattr *sattr, struct nfs4_label *l)
+{ return NULL; }
+static inline void
+nfs4_label_release_security(struct nfs4_label *label)
+{ return; }
+static inline u32 *
+nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
+{ return server->attr_bitmask; }
+#endif
+
 /* Prevent leaks of NFSv4 errors into userland */
 static int nfs4_map_errors(int err)
 {
···
 	| FATTR4_WORD1_SPACE_USED
 	| FATTR4_WORD1_TIME_ACCESS
 	| FATTR4_WORD1_TIME_METADATA
-	| FATTR4_WORD1_TIME_MODIFY
+	| FATTR4_WORD1_TIME_MODIFY,
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+	FATTR4_WORD2_SECURITY_LABEL
+#endif
 };
 
 static const u32 nfs4_pnfs_open_bitmap[3] = {
···
 	| FATTR4_WORD0_FILEID,
 };
 
-const u32 nfs4_statfs_bitmap[2] = {
+const u32 nfs4_statfs_bitmap[3] = {
 	FATTR4_WORD0_FILES_AVAIL
 	| FATTR4_WORD0_FILES_FREE
 	| FATTR4_WORD0_FILES_TOTAL,
···
 	| FATTR4_WORD1_SPACE_TOTAL
 };
 
-const u32 nfs4_pathconf_bitmap[2] = {
+const u32 nfs4_pathconf_bitmap[3] = {
 	FATTR4_WORD0_MAXLINK
 	| FATTR4_WORD0_MAXNAME,
 	0
···
 			FATTR4_WORD2_LAYOUT_BLKSIZE
 };
 
-const u32 nfs4_fs_locations_bitmap[2] = {
+const u32 nfs4_fs_locations_bitmap[3] = {
 	FATTR4_WORD0_TYPE
 	| FATTR4_WORD0_CHANGE
 	| FATTR4_WORD0_SIZE
···
 	| FATTR4_WORD1_TIME_ACCESS
 	| FATTR4_WORD1_TIME_METADATA
 	| FATTR4_WORD1_TIME_MODIFY
-	| FATTR4_WORD1_MOUNTED_ON_FILEID
+	| FATTR4_WORD1_MOUNTED_ON_FILEID,
 };
 
 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
···
 	struct nfs4_string owner_name;
 	struct nfs4_string group_name;
 	struct nfs_fattr f_attr;
+	struct nfs4_label *f_label;
 	struct dentry *dir;
 	struct dentry *dentry;
 	struct nfs4_state_owner *owner;
···
 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
 {
 	p->o_res.f_attr = &p->f_attr;
+	p->o_res.f_label = p->f_label;
 	p->o_res.seqid = p->o_arg.seqid;
 	p->c_res.seqid = p->c_arg.seqid;
 	p->o_res.server = p->o_arg.server;
···
 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
 		struct nfs4_state_owner *sp, fmode_t fmode, int flags,
 		const struct iattr *attrs,
+		struct nfs4_label *label,
 		enum open_claim_type4 claim,
 		gfp_t gfp_mask)
 {
···
 	p = kzalloc(sizeof(*p), gfp_mask);
 	if (p == NULL)
 		goto err;
+
+	p->f_label = nfs4_label_alloc(server, gfp_mask);
+	if (IS_ERR(p->f_label))
+		goto err_free_p;
+
 	p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
 	if (p->o_arg.seqid == NULL)
-		goto err_free;
+		goto err_free_label;
 	nfs_sb_active(dentry->d_sb);
 	p->dentry = dget(dentry);
 	p->dir = parent;
···
 	p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
 	p->o_arg.name = &dentry->d_name;
 	p->o_arg.server = server;
-	p->o_arg.bitmask = server->attr_bitmask;
+	p->o_arg.bitmask = nfs4_bitmask(server, label);
 	p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
+	p->o_arg.label = label;
 	p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
 	switch (p->o_arg.claim) {
 	case NFS4_OPEN_CLAIM_NULL:
···
 	nfs4_init_opendata_res(p);
 	kref_init(&p->kref);
 	return p;
-err_free:
+
+err_free_label:
+	nfs4_label_free(p->f_label);
+err_free_p:
 	kfree(p);
 err:
 	dput(parent);
···
 	if (p->state != NULL)
 		nfs4_put_open_state(p->state);
 	nfs4_put_state_owner(p->owner);
+
+	nfs4_label_free(p->f_label);
+
 	dput(p->dir);
 	dput(p->dentry);
 	nfs_sb_deactive(sb);
···
 	if (ret)
 		goto err;
 
+	nfs_setsecurity(inode, &data->f_attr, data->f_label);
+
 	if (data->o_res.delegation_type != 0)
 		nfs4_opendata_check_deleg(data, state);
 	update_open_stateid(state, &data->o_res.stateid, NULL,
···
 	ret = -EAGAIN;
 	if (!(data->f_attr.valid & NFS_ATTR_FATTR))
 		goto err;
-	inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
+	inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
 	ret = PTR_ERR(inode);
 	if (IS_ERR(inode))
 		goto err;
···
 	struct nfs4_opendata *opendata;
 
 	opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
-			NULL, claim, GFP_NOFS);
+			NULL, NULL, claim, GFP_NOFS);
 	if (opendata == NULL)
 		return ERR_PTR(-ENOMEM);
 	opendata->state = state;
···
 			return status;
 	}
 	if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
-		_nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
+		_nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
 	return 0;
 }
 
···
 static int _nfs4_do_open(struct inode *dir,
 			struct nfs_open_context *ctx,
 			int flags,
-			struct iattr *sattr)
+			struct iattr *sattr,
+			struct nfs4_label *label)
 {
 	struct nfs4_state_owner  *sp;
 	struct nfs4_state     *state = NULL;
···
 	struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
 	fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
 	enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
+	struct nfs4_label *olabel = NULL;
 	int status;
 
 	/* Protect against reboot recovery conflicts */
···
 	if (dentry->d_inode)
 		claim = NFS4_OPEN_CLAIM_FH;
 	opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
-			claim, GFP_KERNEL);
+			label, claim, GFP_KERNEL);
 	if (opendata == NULL)
 		goto err_put_state_owner;
+
+	if (label) {
+		olabel = nfs4_label_alloc(server, GFP_KERNEL);
+		if (IS_ERR(olabel)) {
+			status = PTR_ERR(olabel);
+			goto err_opendata_put;
+		}
+	}
 
 	if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
 		opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
 		if (!opendata->f_attr.mdsthreshold)
-			goto err_opendata_put;
+			goto err_free_label;
 		opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
 	}
 	if (dentry->d_inode != NULL)
···
 
 	status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
 	if (status != 0)
-		goto err_opendata_put;
+		goto err_free_label;
 	state = ctx->state;
 
 	if ((opendata->o_arg.open_flags & O_EXCL) &&
···
 		nfs_fattr_init(opendata->o_res.f_attr);
 		status = nfs4_do_setattr(state->inode, cred,
 				opendata->o_res.f_attr, sattr,
-				state);
-		if (status == 0)
+				state, label, olabel);
+		if (status == 0) {
 			nfs_setattr_update_inode(state->inode, sattr);
-		nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
+			nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
+			nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
+		}
 	}
 
 	if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
···
 		kfree(opendata->f_attr.mdsthreshold);
 	opendata->f_attr.mdsthreshold = NULL;
 
+	nfs4_label_free(olabel);
+
 	nfs4_opendata_put(opendata);
 	nfs4_put_state_owner(sp);
 	return 0;
+err_free_label:
+	nfs4_label_free(olabel);
 err_opendata_put:
 	kfree(opendata->f_attr.mdsthreshold);
 	nfs4_opendata_put(opendata);
···
 static struct nfs4_state *nfs4_do_open(struct inode *dir,
 					struct nfs_open_context *ctx,
 					int flags,
-					struct iattr *sattr)
+					struct iattr *sattr,
+					struct nfs4_label *label)
 {
 	struct nfs_server *server = NFS_SERVER(dir);
 	struct nfs4_exception exception = { };
···
 	int status;
 
 	do {
-		status = _nfs4_do_open(dir, ctx, flags, sattr);
+		status = _nfs4_do_open(dir, ctx, flags, sattr, label);
 		res = ctx->state;
 		if (status == 0)
 			break;
···
 
 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
 			    struct nfs_fattr *fattr, struct iattr *sattr,
-			    struct nfs4_state *state)
+			    struct nfs4_state *state, struct nfs4_label *ilabel,
+			    struct nfs4_label *olabel)
 {
 	struct nfs_server *server = NFS_SERVER(inode);
         struct nfs_setattrargs  arg = {
···
                 .iap            = sattr,
 		.server		= server,
 		.bitmask = server->attr_bitmask,
+		.label		= ilabel,
         };
         struct nfs_setattrres  res = {
 		.fattr		= fattr,
+		.label		= olabel,
 		.server		= server,
         };
         struct rpc_message msg = {
···
 	fmode_t fmode;
 	bool truncate;
 	int status;
+
+	arg.bitmask = nfs4_bitmask(server, ilabel);
+	if (ilabel)
+		arg.bitmask = nfs4_bitmask(server, olabel);
 
 	nfs_fattr_init(fattr);
 
···
 
 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
 			   struct nfs_fattr *fattr, struct iattr *sattr,
-			   struct nfs4_state *state)
+			   struct nfs4_state *state, struct nfs4_label *ilabel,
+			   struct nfs4_label *olabel)
 {
 	struct nfs_server *server = NFS_SERVER(inode);
 	struct nfs4_exception exception = {
···
 	};
 	int err;
 	do {
-		err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
+		err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
 		switch (err) {
 		case -NFS4ERR_OPENMODE:
 			if (!(sattr->ia_valid & ATTR_SIZE)) {
···
 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
 {
 	struct nfs4_state *state;
+	struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
+
+	label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
 
 	/* Protect against concurrent sillydeletes */
-	state = nfs4_do_open(dir, ctx, open_flags, attr);
+	state = nfs4_do_open(dir, ctx, open_flags, attr, label);
+
+	nfs4_label_release_security(label);
+
 	if (IS_ERR(state))
 		return ERR_CAST(state);
 	return state->inode;
···
 			server->caps |= NFS_CAP_CTIME;
 		if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
 			server->caps |= NFS_CAP_MTIME;
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+		if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
+			server->caps |= NFS_CAP_SECURITY_LABEL;
+#endif
+		memcpy(server->attr_bitmask_nl, res.attr_bitmask,
+				sizeof(server->attr_bitmask));
 
+		if (server->caps & NFS_CAP_SECURITY_LABEL) {
+			server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+			res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+		}
 		memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
 		server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
 		server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
···
 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
 		struct nfs_fsinfo *info)
 {
+	u32 bitmask[3];
 	struct nfs4_lookup_root_arg args = {
-		.bitmask = nfs4_fattr_bitmap,
+		.bitmask = bitmask,
 	};
 	struct nfs4_lookup_res res = {
 		.server = server,
···
 		.rpc_argp = &args,
 		.rpc_resp = &res,
 	};
+
+	bitmask[0] = nfs4_fattr_bitmap[0];
+	bitmask[1] = nfs4_fattr_bitmap[1];
+	/*
+	 * Process the label in the upcoming getfattr
+	 */
+	bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
 
 	nfs_fattr_init(info->fattr);
 	return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
···
 {
 	int error;
 	struct nfs_fattr *fattr = info->fattr;
+	struct nfs4_label *label = NULL;
 
 	error = nfs4_server_capabilities(server, mntfh);
 	if (error < 0) {
···
 		return error;
 	}
 
-	error = nfs4_proc_getattr(server, mntfh, fattr);
+	label = nfs4_label_alloc(server, GFP_KERNEL);
+	if (IS_ERR(label))
+		return PTR_ERR(label);
+
+	error = nfs4_proc_getattr(server, mntfh, fattr, label);
 	if (error < 0) {
 		dprintk("nfs4_get_root: getattr error = %d\n", -error);
-		return error;
+		goto err_free_label;
 	}
 
 	if (fattr->valid & NFS_ATTR_FATTR_FSID &&
 	    !nfs_fsid_equal(&server->fsid, &fattr->fsid))
 		memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
+
+err_free_label:
+	nfs4_label_free(label);
 
 	return error;
 }
···
 	return status;
 }
 
-static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
+				struct nfs_fattr *fattr, struct nfs4_label *label)
 {
 	struct nfs4_getattr_arg args = {
 		.fh = fhandle,
···
 	};
 	struct nfs4_getattr_res res = {
 		.fattr = fattr,
+		.label = label,
 		.server = server,
 	};
 	struct rpc_message msg = {
···
 		.rpc_argp = &args,
 		.rpc_resp = &res,
 	};
-	
+
+	args.bitmask = nfs4_bitmask(server, label);
+
 	nfs_fattr_init(fattr);
 	return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
 }
 
-static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
+				struct nfs_fattr *fattr, struct nfs4_label *label)
 {
 	struct nfs4_exception exception = { };
 	int err;
 	do {
 		err = nfs4_handle_exception(server,
-				_nfs4_proc_getattr(server, fhandle, fattr),
+				_nfs4_proc_getattr(server, fhandle, fattr, label),
 				&exception);
 	} while (exception.retry);
 	return err;
···
 	struct inode *inode = dentry->d_inode;
 	struct rpc_cred *cred = NULL;
 	struct nfs4_state *state = NULL;
+	struct nfs4_label *label = NULL;
 	int status;
 
 	if (pnfs_ld_layoutret_on_setattr(inode))
···
 		}
 	}
 
-	status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
-	if (status == 0)
+	label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
+	if (IS_ERR(label))
+		return PTR_ERR(label);
+
+	status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
+	if (status == 0) {
 		nfs_setattr_update_inode(inode, sattr);
+		nfs_setsecurity(inode, fattr, label);
+	}
+	nfs4_label_free(label);
 	return status;
 }
 
 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
 		const struct qstr *name, struct nfs_fh *fhandle,
-		struct nfs_fattr *fattr)
+		struct nfs_fattr *fattr, struct nfs4_label *label)
 {
 	struct nfs_server *server = NFS_SERVER(dir);
 	int		       status;
···
 	struct nfs4_lookup_res res = {
 		.server = server,
 		.fattr = fattr,
+		.label = label,
 		.fh = fhandle,
 	};
 	struct rpc_message msg = {
···
 		.rpc_argp = &args,
 		.rpc_resp = &res,
 	};
+
+	args.bitmask = nfs4_bitmask(server, label);
 
 	nfs_fattr_init(fattr);
 
···
 
 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
 				   struct qstr *name, struct nfs_fh *fhandle,
-				   struct nfs_fattr *fattr)
+				   struct nfs_fattr *fattr, struct nfs4_label *label)
 {
 	struct nfs4_exception exception = { };
 	struct rpc_clnt *client = *clnt;
 	int err;
 	do {
-		err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
+		err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
 		switch (err) {
 		case -NFS4ERR_BADNAME:
 			err = -ENOENT;
···
 }
 
 static int nfs4_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 nfs4_label *label)
 {
 	int status;
 	struct rpc_clnt *client = NFS_CLIENT(dir);
 
-	status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
+	status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
 	if (client != NFS_CLIENT(dir)) {
 		rpc_shutdown_client(client);
 		nfs_fixup_secinfo_attributes(fattr);
···
 	int status;
 	struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
 
-	status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
+	status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
 	if (status < 0) {
 		rpc_shutdown_client(client);
 		return ERR_PTR(status);
···
 		.rpc_cred = entry->cred,
 	};
 	int mode = entry->mask;
-	int status;
+	int status = 0;
 
 	/*
 	 * Determine which access bits we want to ask for...
···
 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 		 int flags)
 {
+	struct nfs4_label l, *ilabel = NULL;
 	struct nfs_open_context *ctx;
 	struct nfs4_state *state;
 	int status = 0;
···
 	if (IS_ERR(ctx))
 		return PTR_ERR(ctx);
 
+	ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
+
 	sattr->ia_mode &= ~current_umask();
-	state = nfs4_do_open(dir, ctx, flags, sattr);
+	state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
 	if (IS_ERR(state)) {
 		status = PTR_ERR(state);
 		goto out;
 	}
 out:
+	nfs4_label_release_security(ilabel);
 	put_nfs_open_context(ctx);
 	return status;
 }
···
 	res->server = server;
 	msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
 	nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
+
+	nfs_fattr_init(res->dir_attr);
 }
 
 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
···
 		.rpc_resp = &res,
 	};
 	int status = -ENOMEM;
-	
+
 	status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
 	if (!status) {
 		update_changeattr(old_dir, &res.old_cinfo);
···
 	};
 	struct nfs4_link_res res = {
 		.server = server,
+		.label = NULL,
 	};
 	struct rpc_message msg = {
 		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
···
 	if (res.fattr == NULL)
 		goto out;
 
+	res.label = nfs4_label_alloc(server, GFP_KERNEL);
+	if (IS_ERR(res.label)) {
+		status = PTR_ERR(res.label);
+		goto out;
+	}
+	arg.bitmask = nfs4_bitmask(server, res.label);
+
 	status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
 	if (!status) {
 		update_changeattr(dir, &res.cinfo);
-		nfs_post_op_update_inode(inode, res.fattr);
+		status = nfs_post_op_update_inode(inode, res.fattr);
+		if (!status)
+			nfs_setsecurity(inode, res.fattr, res.label);
 	}
+
+
+	nfs4_label_free(res.label);
+
 out:
 	nfs_free_fattr(res.fattr);
 	return status;
···
 	struct nfs4_create_res res;
 	struct nfs_fh fh;
 	struct nfs_fattr fattr;
+	struct nfs4_label *label;
 };
 
 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
···
 	if (data != NULL) {
 		struct nfs_server *server = NFS_SERVER(dir);
 
+		data->label = nfs4_label_alloc(server, GFP_KERNEL);
+		if (IS_ERR(data->label))
+			goto out_free;
+
 		data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
 		data->msg.rpc_argp = &data->arg;
 		data->msg.rpc_resp = &data->res;
···
 		data->arg.name = name;
 		data->arg.attrs = sattr;
 		data->arg.ftype = ftype;
-		data->arg.bitmask = server->attr_bitmask;
+		data->arg.bitmask = nfs4_bitmask(server, data->label);
 		data->res.server = server;
 		data->res.fh = &data->fh;
 		data->res.fattr = &data->fattr;
+		data->res.label = data->label;
 		nfs_fattr_init(data->res.fattr);
 	}
 	return data;
+out_free:
+	kfree(data);
+	return NULL;
 }
 
 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
···
 				    &data->arg.seq_args, &data->res.seq_res, 1);
 	if (status == 0) {
 		update_changeattr(dir, &data->res.dir_cinfo);
-		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
+		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
 	}
 	return status;
 }
 
 static void nfs4_free_createdata(struct nfs4_createdata *data)
 {
+	nfs4_label_free(data->label);
 	kfree(data);
 }
 
 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 nfs4_label *label)
 {
 	struct nfs4_createdata *data;
 	int status = -ENAMETOOLONG;
···
 	data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
 	data->arg.u.symlink.pages = &page;
 	data->arg.u.symlink.len = len;
+	data->arg.label = label;
 	
 	status = nfs4_do_create(dir, dentry, data);
 
···
 		struct page *page, unsigned int len, struct iattr *sattr)
 {
 	struct nfs4_exception exception = { };
+	struct nfs4_label l, *label = NULL;
 	int err;
+
+	label = nfs4_label_init_security(dir, dentry, sattr, &l);
+
 	do {
 		err = nfs4_handle_exception(NFS_SERVER(dir),
 				_nfs4_proc_symlink(dir, dentry, page,
-							len, sattr),
+							len, sattr, label),
 				&exception);
 	} while (exception.retry);
+
+	nfs4_label_release_security(label);
 	return err;
 }
 
 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
-		struct iattr *sattr)
+		struct iattr *sattr, struct nfs4_label *label)
 {
 	struct nfs4_createdata *data;
 	int status = -ENOMEM;
···
 	if (data == NULL)
 		goto out;
 
+	data->arg.label = label;
 	status = nfs4_do_create(dir, dentry, data);
 
 	nfs4_free_createdata(data);
···
 		struct iattr *sattr)
 {
 	struct nfs4_exception exception = { };
+	struct nfs4_label l, *label = NULL;
 	int err;
+
+	label = nfs4_label_init_security(dir, dentry, sattr, &l);
 
 	sattr->ia_mode &= ~current_umask();
 	do {
 		err = nfs4_handle_exception(NFS_SERVER(dir),
-				_nfs4_proc_mkdir(dir, dentry, sattr),
+				_nfs4_proc_mkdir(dir, dentry, sattr, label),
 				&exception);
 	} while (exception.retry);
+	nfs4_label_release_security(label);
+
 	return err;
 }
 
···
 }
 
 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
-		struct iattr *sattr, dev_t rdev)
+		struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
 {
 	struct nfs4_createdata *data;
 	int mode = sattr->ia_mode;
···
 		status = -EINVAL;
 		goto out_free;
 	}
-	
+
+	data->arg.label = label;
 	status = nfs4_do_create(dir, dentry, data);
 out_free:
 	nfs4_free_createdata(data);
···
 		struct iattr *sattr, dev_t rdev)
 {
 	struct nfs4_exception exception = { };
+	struct nfs4_label l, *label = NULL;
 	int err;
+
+	label = nfs4_label_init_security(dir, dentry, sattr, &l);
 
 	sattr->ia_mode &= ~current_umask();
 	do {
 		err = nfs4_handle_exception(NFS_SERVER(dir),
-				_nfs4_proc_mknod(dir, dentry, sattr, rdev),
+				_nfs4_proc_mknod(dir, dentry, sattr, label, rdev),
 				&exception);
 	} while (exception.retry);
+
+	nfs4_label_release_security(label);
+
 	return err;
 }
 
···
 	} while (exception.retry);
 	return err;
 }
+
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+static int _nfs4_get_security_label(struct inode *inode, void *buf,
+					size_t buflen)
+{
+	struct nfs_server *server = NFS_SERVER(inode);
+	struct nfs_fattr fattr;
+	struct nfs4_label label = {0, 0, buflen, buf};
+
+	u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
+	struct nfs4_getattr_arg args = {
+		.fh		= NFS_FH(inode),
+		.bitmask	= bitmask,
+	};
+	struct nfs4_getattr_res res = {
+		.fattr		= &fattr,
+		.label		= &label,
+		.server		= server,
+	};
+	struct rpc_message msg = {
+		.rpc_proc	= &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
+		.rpc_argp	= &args,
+		.rpc_resp	= &res,
+	};
+	int ret;
+
+	nfs_fattr_init(&fattr);
+
+	ret = rpc_call_sync(server->client, &msg, 0);
+	if (ret)
+		return ret;
+	if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
+		return -ENOENT;
+	if (buflen < label.len)
+		return -ERANGE;
+	return 0;
+}
+
+static int nfs4_get_security_label(struct inode *inode, void *buf,
+					size_t buflen)
+{
+	struct nfs4_exception exception = { };
+	int err;
+
+	if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
+		return -EOPNOTSUPP;
+
+	do {
+		err = nfs4_handle_exception(NFS_SERVER(inode),
+				_nfs4_get_security_label(inode, buf, buflen),
+				&exception);
+	} while (exception.retry);
+	return err;
+}
+
+static int _nfs4_do_set_security_label(struct inode *inode,
+		struct nfs4_label *ilabel,
+		struct nfs_fattr *fattr,
+		struct nfs4_label *olabel)
+{
+
+	struct iattr sattr = {0};
+	struct nfs_server *server = NFS_SERVER(inode);
+	const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
+	struct nfs_setattrargs args = {
+		.fh             = NFS_FH(inode),
+		.iap            = &sattr,
+		.server		= server,
+		.bitmask	= bitmask,
+		.label		= ilabel,
+	};
+	struct nfs_setattrres res = {
+		.fattr		= fattr,
+		.label		= olabel,
+		.server		= server,
+	};
+	struct rpc_message msg = {
+		.rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
+		.rpc_argp       = &args,
+		.rpc_resp       = &res,
+	};
+	int status;
+
+	nfs4_stateid_copy(&args.stateid, &zero_stateid);
+
+	status = rpc_call_sync(server->client, &msg, 0);
+	if (status)
+		dprintk("%s failed: %d\n", __func__, status);
+
+	return status;
+}
+
+static int nfs4_do_set_security_label(struct inode *inode,
+		struct nfs4_label *ilabel,
+		struct nfs_fattr *fattr,
+		struct nfs4_label *olabel)
+{
+	struct nfs4_exception exception = { };
+	int err;
+
+	do {
+		err = nfs4_handle_exception(NFS_SERVER(inode),
+				_nfs4_do_set_security_label(inode, ilabel,
+				fattr, olabel),
+				&exception);
+	} while (exception.retry);
+	return err;
+}
+
+static int
+nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
+{
+	struct nfs4_label ilabel, *olabel = NULL;
+	struct nfs_fattr fattr;
+	struct rpc_cred *cred;
+	struct inode *inode = dentry->d_inode;
+	int status;
+
+	if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
+		return -EOPNOTSUPP;
+
+	nfs_fattr_init(&fattr);
+
+	ilabel.pi = 0;
+	ilabel.lfs = 0;
+	ilabel.label = (char *)buf;
+	ilabel.len = buflen;
+
+	cred = rpc_lookup_cred();
+	if (IS_ERR(cred))
+		return PTR_ERR(cred);
+
+	olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
+	if (IS_ERR(olabel)) {
+		status = -PTR_ERR(olabel);
+		goto out;
+	}
+
+	status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
+	if (status == 0)
+		nfs_setsecurity(inode, &fattr, olabel);
+
+	nfs4_label_free(olabel);
+out:
+	put_rpccred(cred);
+	return status;
+}
+#endif	/* CONFIG_NFS_V4_SECURITY_LABEL */
+
 
 static int
 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
···
 	return len;
 }
 
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+static inline int nfs4_server_supports_labels(struct nfs_server *server)
+{
+	return server->caps & NFS_CAP_SECURITY_LABEL;
+}
+
+static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
+				   const void *buf, size_t buflen,
+				   int flags, int type)
+{
+	if (security_ismaclabel(key))
+		return nfs4_set_security_label(dentry, buf, buflen);
+
+	return -EOPNOTSUPP;
+}
+
+static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
+				   void *buf, size_t buflen, int type)
+{
+	if (security_ismaclabel(key))
+		return nfs4_get_security_label(dentry->d_inode, buf, buflen);
+	return -EOPNOTSUPP;
+}
+
+static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
+				       size_t list_len, const char *name,
+				       size_t name_len, int type)
+{
+	size_t len = 0;
+
+	if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
+		len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
+		if (list && len <= list_len)
+			security_inode_listsecurity(dentry->d_inode, list, len);
+	}
+	return len;
+}
+
+static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
+	.prefix = XATTR_SECURITY_PREFIX,
+	.list	= nfs4_xattr_list_nfs4_label,
+	.get	= nfs4_xattr_get_nfs4_label,
+	.set	= nfs4_xattr_set_nfs4_label,
+};
+#endif
+
+
 /*
  * nfs_fhget will use either the mounted_on_fileid or the fileid
  */
···
 				   struct page *page)
 {
 	struct nfs_server *server = NFS_SERVER(dir);
-	u32 bitmask[2] = {
+	u32 bitmask[3] = {
 		[0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
 	};
 	struct nfs4_fs_locations_arg args = {
···
 };
 #endif
 
+#if defined(CONFIG_NFS_V4_2)
+static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
+	.minor_version = 2,
+	.init_caps = NFS_CAP_READDIRPLUS
+		| NFS_CAP_ATOMIC_OPEN
+		| NFS_CAP_CHANGE_ATTR
+		| NFS_CAP_POSIX_LOCK
+		| NFS_CAP_STATEID_NFSV41
+		| NFS_CAP_ATOMIC_OPEN_V1,
+	.call_sync = nfs4_call_sync_sequence,
+	.match_stateid = nfs41_match_stateid,
+	.find_root_sec = nfs41_find_root_sec,
+	.free_lock_state = nfs41_free_lock_state,
+	.reboot_recovery_ops = &nfs41_reboot_recovery_ops,
+	.nograce_recovery_ops = &nfs41_nograce_recovery_ops,
+	.state_renewal_ops = &nfs41_state_renewal_ops,
+};
+#endif
+
 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
 	[0] = &nfs_v4_0_minor_ops,
 #if defined(CONFIG_NFS_V4_1)
 	[1] = &nfs_v4_1_minor_ops,
+#endif
+#if defined(CONFIG_NFS_V4_2)
+	[2] = &nfs_v4_2_minor_ops,
 #endif
 };
 
···
 
 const struct xattr_handler *nfs4_xattr_handlers[] = {
 	&nfs4_xattr_nfs4_acl_handler,
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+	&nfs4_xattr_nfs4_label_handler,
+#endif
 	NULL
 };
 

fs/nfs/nfs4xdr.c

···
 #define nfs4_path_maxsz		(1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 #define nfs4_owner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
 #define nfs4_group_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
+#define	nfs4_label_maxsz	(4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
+#define encode_readdir_space 24
+#define encode_readdir_bitmask_sz 3
+#else
+#define	nfs4_label_maxsz	0
+#define encode_readdir_space 20
+#define encode_readdir_bitmask_sz 2
+#endif
 /* We support only one layout type per file system */
 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 /* This is based on getfattr, which uses the most attributes: */
 #define nfs4_fattr_value_maxsz	(1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 				3 + 3 + 3 + nfs4_owner_maxsz + \
-				nfs4_group_maxsz + decode_mdsthreshold_maxsz))
+				nfs4_group_maxsz + nfs4_label_maxsz + \
+				 decode_mdsthreshold_maxsz))
 #define nfs4_fattr_maxsz	(nfs4_fattr_bitmap_maxsz + \
 				nfs4_fattr_value_maxsz)
 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
···
 				 1 + 2 + 1 + \
 				nfs4_owner_maxsz + \
 				nfs4_group_maxsz + \
+				nfs4_label_maxsz + \
 				4 + 4)
 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
···
 				 encode_stateid_maxsz + 3)
 #define decode_read_maxsz	(op_decode_hdr_maxsz + 2)
 #define encode_readdir_maxsz	(op_encode_hdr_maxsz + \
-				 2 + encode_verifier_maxsz + 5)
+				 2 + encode_verifier_maxsz + 5 + \
+				nfs4_label_maxsz)
 #define decode_readdir_maxsz	(op_decode_hdr_maxsz + \
-				 decode_verifier_maxsz)
+				 decode_verifier_maxsz + \
+				nfs4_label_maxsz + nfs4_fattr_maxsz)
 #define encode_readlink_maxsz	(op_encode_hdr_maxsz)
 #define decode_readlink_maxsz	(op_decode_hdr_maxsz + 1)
 #define encode_write_maxsz	(op_encode_hdr_maxsz + \
···
 	encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 }
 
-static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
+static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
+				const struct nfs4_label *label,
+				const struct nfs_server *server)
 {
 	char owner_name[IDMAP_NAMESZ];
 	char owner_group[IDMAP_NAMESZ];
···
 	int len;
 	uint32_t bmval0 = 0;
 	uint32_t bmval1 = 0;
+	uint32_t bmval2 = 0;
 
 	/*
 	 * We reserve enough space to write the entire attribute buffer at once.
 	 * In the worst-case, this would be
-	 *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
-	 *          = 36 bytes, plus any contribution from variable-length fields
+	 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
+	 * = 40 bytes, plus any contribution from variable-length fields
 	 *            such as owner/group.
 	 */
-	len = 16;
+	len = 20;
 
 	/* Sigh */
 	if (iap->ia_valid & ATTR_SIZE)
···
 		}
 		len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 	}
+	if (label)
+		len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
 	if (iap->ia_valid & ATTR_ATIME_SET)
 		len += 16;
 	else if (iap->ia_valid & ATTR_ATIME)
···
 	 * We write the bitmap length now, but leave the bitmap and the attribute
 	 * buffer length to be backfilled at the end of this routine.
 	 */
-	*p++ = cpu_to_be32(2);
+	*p++ = cpu_to_be32(3);
 	q = p;
-	p += 3;
+	p += 4;
 
 	if (iap->ia_valid & ATTR_SIZE) {
 		bmval0 |= FATTR4_WORD0_SIZE;
···
 		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 		*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 	}
+	if (label) {
+		bmval2 |= FATTR4_WORD2_SECURITY_LABEL;
+		*p++ = cpu_to_be32(label->lfs);
+		*p++ = cpu_to_be32(label->pi);
+		*p++ = cpu_to_be32(label->len);
+		p = xdr_encode_opaque_fixed(p, label->label, label->len);
+	}
 
 	/*
 	 * Now we backfill the bitmap and the attribute buffer length.
···
 				len, ((char *)p - (char *)q) + 4);
 		BUG();
 	}
-	len = (char *)p - (char *)q - 12;
+	len = (char *)p - (char *)q - 16;
 	*q++ = htonl(bmval0);
 	*q++ = htonl(bmval1);
+	*q++ = htonl(bmval2);
 	*q = htonl(len);
 
 /* out: */
···
 	}
 
 	encode_string(xdr, create->name->len, create->name->name);
-	encode_attrs(xdr, create->attrs, create->server);
+	encode_attrs(xdr, create->attrs, create->label, create->server);
 }
 
 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
···
 
 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 {
-	encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
-			   bitmask[1] & nfs4_fattr_bitmap[1], hdr);
+	encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
+			   bitmask[1] & nfs4_fattr_bitmap[1],
+			   bitmask[2] & nfs4_fattr_bitmap[2],
+			   hdr);
 }
 
 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
···
 	switch(arg->createmode) {
 	case NFS4_CREATE_UNCHECKED:
 		*p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
-		encode_attrs(xdr, arg->u.attrs, arg->server);
+		encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
 		break;
 	case NFS4_CREATE_GUARDED:
 		*p = cpu_to_be32(NFS4_CREATE_GUARDED);
-		encode_attrs(xdr, arg->u.attrs, arg->server);
+		encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
 		break;
 	case NFS4_CREATE_EXCLUSIVE:
 		*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
···
 		*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
 		encode_nfs4_verifier(xdr, &arg->u.verifier);
 		dummy.ia_valid = 0;
-		encode_attrs(xdr, &dummy, arg->server);
+		encode_attrs(xdr, &dummy, arg->label, arg->server);
 	}
 }
 
···
 
 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
 {
-	uint32_t attrs[2] = {
+	uint32_t attrs[3] = {
 		FATTR4_WORD0_RDATTR_ERROR,
 		FATTR4_WORD1_MOUNTED_ON_FILEID,
 	};
···
 	encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
 	encode_uint64(xdr, readdir->cookie);
 	encode_nfs4_verifier(xdr, &readdir->verifier);
-	p = reserve_space(xdr, 20);
+	p = reserve_space(xdr, encode_readdir_space);
 	*p++ = cpu_to_be32(dircount);
 	*p++ = cpu_to_be32(readdir->count);
-	*p++ = cpu_to_be32(2);
-
+	*p++ = cpu_to_be32(encode_readdir_bitmask_sz);
 	*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
-	*p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
+	*p   = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
+	if (encode_readdir_bitmask_sz > 2) {
+		if (hdr->minorversion > 1)
+			attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
+		p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]);
+	}
 	memcpy(verf, readdir->verifier.data, sizeof(verf));
-	dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
+
+	dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
 			__func__,
 			(unsigned long long)readdir->cookie,
 			verf[0], verf[1],
 			attrs[0] & readdir->bitmask[0],
-			attrs[1] & readdir->bitmask[1]);
+			attrs[1] & readdir->bitmask[1],
+			attrs[2] & readdir->bitmask[2]);
 }
 
 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
···
 {
 	encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
 	encode_nfs4_stateid(xdr, &arg->stateid);
-	encode_attrs(xdr, arg->iap, server);
+	encode_attrs(xdr, arg->iap, arg->label, server);
 }
 
 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
···
 	return status;
 }
 
+static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
+					struct nfs4_label *label)
+{
+	uint32_t pi = 0;
+	uint32_t lfs = 0;
+	__u32 len;
+	__be32 *p;
+	int status = 0;
+
+	if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
+		return -EIO;
+	if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
+		p = xdr_inline_decode(xdr, 4);
+		if (unlikely(!p))
+			goto out_overflow;
+		lfs = be32_to_cpup(p++);
+		p = xdr_inline_decode(xdr, 4);
+		if (unlikely(!p))
+			goto out_overflow;
+		pi = be32_to_cpup(p++);
+		p = xdr_inline_decode(xdr, 4);
+		if (unlikely(!p))
+			goto out_overflow;
+		len = be32_to_cpup(p++);
+		p = xdr_inline_decode(xdr, len);
+		if (unlikely(!p))
+			goto out_overflow;
+		if (len < NFS4_MAXLABELLEN) {
+			if (label) {
+				memcpy(label->label, p, len);
+				label->len = len;
+				label->pi = pi;
+				label->lfs = lfs;
+				status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
+			}
+			bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+		} else
+			printk(KERN_WARNING "%s: label too long (%u)!\n",
+					__func__, len);
+	}
+	if (label && label->label)
+		dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
+			(char *)label->label, label->len, label->pi, label->lfs);
+	return status;
+
+out_overflow:
+	print_overflow_msg(__func__, xdr);
+	return -EIO;
+}
+
 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
 {
 	int status = 0;
···
 
 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
 		struct nfs_fattr *fattr, struct nfs_fh *fh,
-		struct nfs4_fs_locations *fs_loc,
+		struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
 		const struct nfs_server *server)
 {
 	int status;
···
 	if (status < 0)
 		goto xdr_error;
 
+	if (label) {
+		status = decode_attr_security_label(xdr, bitmap, label);
+		if (status < 0)
+			goto xdr_error;
+		fattr->valid |= status;
+	}
+
 xdr_error:
 	dprintk("%s: xdr returned %d\n", __func__, -status);
 	return status;
···
 
 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
 		struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
-		const struct nfs_server *server)
+		struct nfs4_label *label, const struct nfs_server *server)
 {
 	unsigned int savep;
 	uint32_t attrlen,
···
 	if (status < 0)
 		goto xdr_error;
 
-	status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
+	status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
+					label, server);
 	if (status < 0)
 		goto xdr_error;
 
···
 	return status;
 }
 
+static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+		struct nfs4_label *label, const struct nfs_server *server)
+{
+	return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
+}
+
 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
 		const struct nfs_server *server)
 {
-	return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
+	return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
 }
 
 /*
···
 	status = decode_getfh(xdr, res->fh);
 	if (status)
 		goto out;
-	status = decode_getfattr(xdr, res->fattr, res->server);
+	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
 out:
 	return status;
 }
···
 		goto out;
 	status = decode_getfh(xdr, res->fh);
 	if (status == 0)
-		status = decode_getfattr(xdr, res->fattr, res->server);
+		status = decode_getfattr_label(xdr, res->fattr,
+						res->label, res->server);
 out:
 	return status;
 }
···
 	status = decode_restorefh(xdr);
 	if (status)
 		goto out;
-	decode_getfattr(xdr, res->fattr, res->server);
+	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
 out:
 	return status;
 }
···
 	status = decode_getfh(xdr, res->fh);
 	if (status)
 		goto out;
-	decode_getfattr(xdr, res->fattr, res->server);
+	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
 out:
 	return status;
 }
···
 	status = decode_putfh(xdr);
 	if (status)
 		goto out;
-	status = decode_getfattr(xdr, res->fattr, res->server);
+	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
 out:
 	return status;
 }
···
 		goto out;
 	if (res->access_request)
 		decode_access(xdr, &res->access_supported, &res->access_result);
-	decode_getfattr(xdr, res->f_attr, res->server);
+	decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
 out:
 	return status;
 }
···
 	status = decode_setattr(xdr);
 	if (status)
 		goto out;
-	decode_getfattr(xdr, res->fattr, res->server);
+	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
 out:
 	return status;
 }
···
 	xdr_enter_page(xdr, PAGE_SIZE);
 	status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
 					 NULL, res->fs_locations,
-					 res->fs_locations->server);
+					 NULL, res->fs_locations->server);
 out:
 	return status;
 }
···
 		goto out_overflow;
 
 	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
-				  NULL, entry->server) < 0)
+			NULL, entry->label, entry->server) < 0)
 		goto out_overflow;
 	if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
 		entry->ino = entry->fattr->mounted_on_fileid;

fs/nfs/proc.c

···
  */
 static int
 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
-		struct nfs_fattr *fattr)
+		struct nfs_fattr *fattr, struct nfs4_label *label)
 {
 	struct rpc_message msg = {
 		.rpc_proc	= &nfs_procedures[NFSPROC_GETATTR],
···
 
 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 nfs4_label *label)
 {
 	struct nfs_diropargs	arg = {
 		.fh		= NFS_FH(dir),
···
 	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 	nfs_mark_for_revalidate(dir);
 	if (status == 0)
-		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
+		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 	nfs_free_createdata(data);
 out:
 	dprintk("NFS reply create: %d\n", status);
···
 		status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 	}
 	if (status == 0)
-		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
+		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 	nfs_free_createdata(data);
 out:
 	dprintk("NFS reply mknod: %d\n", status);
···
 	 * should fill in the data with a LOOKUP call on the wire.
 	 */
 	if (status == 0)
-		status = nfs_instantiate(dentry, fh, fattr);
+		status = nfs_instantiate(dentry, fh, fattr, NULL);
 
 out_free:
 	nfs_free_fattr(fattr);
···
 	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 	nfs_mark_for_revalidate(dir);
 	if (status == 0)
-		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
+		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 	nfs_free_createdata(data);
 out:
 	dprintk("NFS reply mkdir: %d\n", status);

fs/nfs/super.c

···
 
 enum {
 	Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0,
-	Opt_vers_4_1,
+	Opt_vers_4_1, Opt_vers_4_2,
 
 	Opt_vers_err
 };
···
 	{ Opt_vers_4, "4" },
 	{ Opt_vers_4_0, "4.0" },
 	{ Opt_vers_4_1, "4.1" },
+	{ Opt_vers_4_2, "4.2" },
 
 	{ Opt_vers_err, NULL }
 };
···
 		seq_printf(m, "\n\tnfsv4:\t");
 		seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
 		seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
+		seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]);
 		seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
 		show_sessions(m, nfss);
 		show_pnfs(m, nfss);
···
 	case Opt_vers_4_1:
 		mnt->version = 4;
 		mnt->minorversion = 1;
+		break;
+	case Opt_vers_4_2:
+		mnt->version = 4;
+		mnt->minorversion = 2;
 		break;
 	default:
 		return 0;
···
 int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot,
 			struct nfs_mount_info *mount_info)
 {
-	return security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts);
+	int error;
+	unsigned long kflags = 0, kflags_out = 0;
+	if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL)
+		kflags |= SECURITY_LSM_NATIVE_LABELS;
+
+	error = security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts,
+						kflags, &kflags_out);
+	if (error)
+		goto err;
+
+	if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL &&
+		!(kflags_out & SECURITY_LSM_NATIVE_LABELS))
+		NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL;
+err:
+	return error;
 }
 EXPORT_SYMBOL_GPL(nfs_set_sb_security);
 

fs/nfsd/nfsd.h

···
 #define nfserr_reject_deleg		cpu_to_be32(NFS4ERR_REJECT_DELEG)
 #define nfserr_returnconflict		cpu_to_be32(NFS4ERR_RETURNCONFLICT)
 #define nfserr_deleg_revoked		cpu_to_be32(NFS4ERR_DELEG_REVOKED)
+#define nfserr_partner_notsupp		cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
+#define nfserr_partner_no_auth		cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
+#define nfserr_metadata_notsupp		cpu_to_be32(NFS4ERR_METADATA_NOTSUPP)
+#define nfserr_offload_denied		cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
+#define nfserr_wrong_lfs		cpu_to_be32(NFS4ERR_WRONG_LFS)
+#define nfserr_badlabel		cpu_to_be32(NFS4ERR_BADLABEL)
 
 /* error codes for internal use */
 /* if a request fails due to kmalloc failure, it gets dropped.

include/linux/nfs4.h

···
 	struct nfs4_ace	aces[0];
 };
 
+#define NFS4_MAXLABELLEN	2048
+
+struct nfs4_label {
+	uint32_t	lfs;
+	uint32_t	pi;
+	u32		len;
+	char	*label;
+};
+
 typedef struct { char data[NFS4_VERIFIER_SIZE]; } nfs4_verifier;
 
 struct nfs_stateid4 {
···
 	NFS4ERR_REJECT_DELEG	= 10085,	/* on callback */
 	NFS4ERR_RETURNCONFLICT	= 10086,	/* outstanding layoutreturn */
 	NFS4ERR_DELEG_REVOKED	= 10087,	/* deleg./layout revoked */
+
+	/* nfs42 */
+	NFS4ERR_PARTNER_NOTSUPP	= 10088,
+	NFS4ERR_PARTNER_NO_AUTH	= 10089,
+	NFS4ERR_METADATA_NOTSUPP = 10090,
+	NFS4ERR_OFFLOAD_DENIED = 10091,
+	NFS4ERR_WRONG_LFS = 10092,
+	NFS4ERR_BADLABEL = 10093,
 };
 
 static inline bool seqid_mutating_err(u32 err)
···
 #define FATTR4_WORD1_FS_LAYOUT_TYPES    (1UL << 30)
 #define FATTR4_WORD2_LAYOUT_BLKSIZE     (1UL << 1)
 #define FATTR4_WORD2_MDSTHRESHOLD       (1UL << 4)
+#define FATTR4_WORD2_SECURITY_LABEL     (1UL << 17)
 
 /* MDS threshold bitmap bits */
 #define THRESHOLD_RD                    (1UL << 0)
···
 #define NFS4_VERSION 4
 #define NFS4_MINOR_VERSION 0
 
+#if defined(CONFIG_NFS_V4_2)
+#define NFS4_MAX_MINOR_VERSION 2
+#else
 #if defined(CONFIG_NFS_V4_1)
 #define NFS4_MAX_MINOR_VERSION 1
 #else
 #define NFS4_MAX_MINOR_VERSION 0
 #endif /* CONFIG_NFS_V4_1 */
+#endif /* CONFIG_NFS_V4_2 */
 
 #define NFS4_DEBUG 1
 

include/linux/nfs_fs.h

···
 #define NFS_INO_INVALID_ACL	0x0010		/* cached acls are invalid */
 #define NFS_INO_REVAL_PAGECACHE	0x0020		/* must revalidate pagecache */
 #define NFS_INO_REVAL_FORCED	0x0040		/* force revalidation ignoring a delegation */
+#define NFS_INO_INVALID_LABEL	0x0080		/* cached label is invalid */
 
 /*
  * Bit offsets in flags field
···
 extern void nfs_zap_caches(struct inode *);
 extern void nfs_invalidate_atime(struct inode *);
 extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
-				struct nfs_fattr *);
+				struct nfs_fattr *, struct nfs4_label *);
 extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
 extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
 extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
···
 extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
 extern int nfs_setattr(struct dentry *, struct iattr *);
 extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
+extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
+				struct nfs4_label *label);
 extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
 extern void put_nfs_open_context(struct nfs_open_context *ctx);
 extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
···
 extern const struct dentry_operations nfs_dentry_operations;
 
 extern void nfs_force_lookup_revalidate(struct inode *dir);
-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 nfs4_label *label);
 extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
 extern void nfs_access_zap_cache(struct inode *inode);
 
···
 extern const struct inode_operations nfs_referral_inode_operations;
 extern int nfs_mountpoint_expiry_timeout;
 extern void nfs_release_automount_timer(void);
+
+/*
+ * linux/fs/nfs/nfs4proc.c
+ */
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
+static inline void nfs4_label_free(struct nfs4_label *label)
+{
+	if (label) {
+		kfree(label->label);
+		kfree(label);
+	}
+	return;
+}
+#else
+static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
+static inline void nfs4_label_free(void *label) {}
+#endif
 
 /*
  * linux/fs/nfs/unlink.c

include/linux/nfs_fs_sb.h

···
 	u32			attr_bitmask[3];/* V4 bitmask representing the set
 						   of attributes supported on this
 						   filesystem */
-	u32			cache_consistency_bitmask[2];
+	u32			attr_bitmask_nl[3];
+						/* V4 bitmask representing the
+						   set of attributes supported
+						   on this filesystem excluding
+						   the label support bit. */
+	u32			cache_consistency_bitmask[3];
 						/* V4 bitmask representing the subset
 						   of change attribute, size, ctime
 						   and mtime attributes supported by
···
 #define NFS_CAP_UIDGID_NOMAP	(1U << 15)
 #define NFS_CAP_STATEID_NFSV41	(1U << 16)
 #define NFS_CAP_ATOMIC_OPEN_V1	(1U << 17)
+#define NFS_CAP_SECURITY_LABEL	(1U << 18)
 
 #endif

include/linux/nfs_xdr.h

···
 #define NFS_ATTR_FATTR_MOUNTED_ON_FILEID (1U << 22)
 #define NFS_ATTR_FATTR_OWNER_NAME	(1U << 23)
 #define NFS_ATTR_FATTR_GROUP_NAME	(1U << 24)
+#define NFS_ATTR_FATTR_V4_SECURITY_LABEL (1U << 25)
 
 #define NFS_ATTR_FATTR (NFS_ATTR_FATTR_TYPE \
 		| NFS_ATTR_FATTR_MODE \
···
 #define NFS_ATTR_FATTR_V3 (NFS_ATTR_FATTR \
 		| NFS_ATTR_FATTR_SPACE_USED)
 #define NFS_ATTR_FATTR_V4 (NFS_ATTR_FATTR \
-		| NFS_ATTR_FATTR_SPACE_USED)
+		| NFS_ATTR_FATTR_SPACE_USED \
+		| NFS_ATTR_FATTR_V4_SECURITY_LABEL)
 
 /*
  * Info on the file system
···
 	const u32 *		open_bitmap;
 	__u32			claim;
 	enum createmode4	createmode;
+	const struct nfs4_label *label;
 };
 
 struct nfs_openres {
···
 	struct nfs4_change_info	cinfo;
 	__u32                   rflags;
 	struct nfs_fattr *      f_attr;
+	struct nfs4_label	*f_label;
 	struct nfs_seqid *	seqid;
 	const struct nfs_server *server;
 	fmode_t			delegation_type;
···
 	int			eof;
 	struct nfs_fh *		fh;
 	struct nfs_fattr *	fattr;
+	struct nfs4_label  *label;
 	unsigned char		d_type;
 	struct nfs_server *	server;
 };
···
 	struct iattr *                  iap;
 	const struct nfs_server *	server; /* Needed for name mapping */
 	const u32 *			bitmask;
+	const struct nfs4_label		*label;
 };
 
 struct nfs_setaclargs {
···
 struct nfs_setattrres {
 	struct nfs4_sequence_res	seq_res;
 	struct nfs_fattr *              fattr;
+	struct nfs4_label		*label;
 	const struct nfs_server *	server;
 };
 
···
 	const struct iattr *		attrs;
 	const struct nfs_fh *		dir_fh;
 	const u32 *			bitmask;
+	const struct nfs4_label		*label;
 };
 
 struct nfs4_create_res {
···
 	const struct nfs_server *	server;
 	struct nfs_fh *			fh;
 	struct nfs_fattr *		fattr;
+	struct nfs4_label		*label;
 	struct nfs4_change_info		dir_cinfo;
 };
 
···
 	struct nfs4_sequence_res	seq_res;
 	const struct nfs_server *	server;
 	struct nfs_fattr *		fattr;
+	struct nfs4_label		*label;
 };
 
 struct nfs4_link_arg {
···
 	struct nfs4_sequence_res	seq_res;
 	const struct nfs_server *	server;
 	struct nfs_fattr *		fattr;
+	struct nfs4_label		*label;
 	struct nfs4_change_info		cinfo;
 	struct nfs_fattr *		dir_attr;
 };
···
 	const struct nfs_server *	server;
 	struct nfs_fattr *		fattr;
 	struct nfs_fh *			fh;
+	struct nfs4_label		*label;
 };
 
 struct nfs4_lookup_root_arg {
···
 	struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *,
 				     struct nfs_subversion *);
 	int	(*getattr) (struct nfs_server *, struct nfs_fh *,
-			    struct nfs_fattr *);
+			    struct nfs_fattr *, struct nfs4_label *);
 	int	(*setattr) (struct dentry *, struct nfs_fattr *,
 			    struct iattr *);
 	int	(*lookup)  (struct inode *, struct qstr *,
-			    struct nfs_fh *, struct nfs_fattr *);
+			    struct nfs_fh *, struct nfs_fattr *,
+			    struct nfs4_label *);
 	int	(*access)  (struct inode *, struct nfs_access_entry *);
 	int	(*readlink)(struct inode *, struct page *, unsigned int,
 			    unsigned int);

include/linux/security.h

···
 #include <linux/capability.h>
 #include <linux/slab.h>
 #include <linux/err.h>
+#include <linux/string.h>
 
 struct linux_binprm;
 struct cred;
···
 /* If capable should audit the security request */
 #define SECURITY_CAP_NOAUDIT 0
 #define SECURITY_CAP_AUDIT 1
+
+/* LSM Agnostic defines for sb_set_mnt_opts */
+#define SECURITY_LSM_NATIVE_LABELS	1
 
 struct ctl_table;
 struct audit_krule;
···
  *	Parse a string of security data filling in the opts structure
  *	@options string containing all mount options known by the LSM
  *	@opts binary data structure usable by the LSM
+ * @dentry_init_security:
+ *	Compute a context for a dentry as the inode is not yet available
+ *	since NFSv4 has no label backed by an EA anyway.
+ *	@dentry dentry to use in calculating the context.
+ *	@mode mode used to determine resource type.
+ *	@name name of the last path component used to create file
+ *	@ctx pointer to place the pointer to the resulting context in.
+ *	@ctxlen point to place the length of the resulting context.
+ *
  *
  * Security hooks for inode operations.
  *
···
  *	@pages contains the number of pages.
  *	Return 0 if permission is granted.
  *
+ * @ismaclabel:
+ *	Check if the extended attribute specified by @name
+ *	represents a MAC label. Returns 1 if name is a MAC
+ *	attribute otherwise returns 0.
+ *	@name full extended attribute name to check against
+ *	LSM as a MAC label.
+ *
  * @secid_to_secctx:
  *	Convert secid to security context.  If secdata is NULL the length of
  *	the result will be returned in seclen, but no secdata will be returned.
···
 	int (*sb_pivotroot) (struct path *old_path,
 			     struct path *new_path);
 	int (*sb_set_mnt_opts) (struct super_block *sb,
-				struct security_mnt_opts *opts);
+				struct security_mnt_opts *opts,
+				unsigned long kern_flags,
+				unsigned long *set_kern_flags);
 	int (*sb_clone_mnt_opts) (const struct super_block *oldsb,
 				   struct super_block *newsb);
 	int (*sb_parse_opts_str) (char *options, struct security_mnt_opts *opts);
+	int (*dentry_init_security) (struct dentry *dentry, int mode,
+					struct qstr *name, void **ctx,
+					u32 *ctxlen);
+
 
 #ifdef CONFIG_SECURITY_PATH
 	int (*path_unlink) (struct path *dir, struct dentry *dentry);
···
 
 	int (*getprocattr) (struct task_struct *p, char *name, char **value);
 	int (*setprocattr) (struct task_struct *p, char *name, void *value, size_t size);
+	int (*ismaclabel) (const char *name);
 	int (*secid_to_secctx) (u32 secid, char **secdata, u32 *seclen);
 	int (*secctx_to_secid) (const char *secdata, u32 seclen, u32 *secid);
 	void (*release_secctx) (char *secdata, u32 seclen);
···
 		      const char *type, unsigned long flags, void *data);
 int security_sb_umount(struct vfsmount *mnt, int flags);
 int security_sb_pivotroot(struct path *old_path, struct path *new_path);
-int security_sb_set_mnt_opts(struct super_block *sb, struct security_mnt_opts *opts);
+int security_sb_set_mnt_opts(struct super_block *sb,
+				struct security_mnt_opts *opts,
+				unsigned long kern_flags,
+				unsigned long *set_kern_flags);
 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 				struct super_block *newsb);
 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts);
+int security_dentry_init_security(struct dentry *dentry, int mode,
+					struct qstr *name, void **ctx,
+					u32 *ctxlen);
 
 int security_inode_alloc(struct inode *inode);
 void security_inode_free(struct inode *inode);
···
 int security_getprocattr(struct task_struct *p, char *name, char **value);
 int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size);
 int security_netlink_send(struct sock *sk, struct sk_buff *skb);
+int security_ismaclabel(const char *name);
 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen);
 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid);
 void security_release_secctx(char *secdata, u32 seclen);
···
 }
 
 static inline int security_sb_set_mnt_opts(struct super_block *sb,
-					   struct security_mnt_opts *opts)
+					   struct security_mnt_opts *opts,
+					   unsigned long kern_flags,
+					   unsigned long *set_kern_flags)
 {
 	return 0;
 }
···
 
 static inline void security_inode_free(struct inode *inode)
 { }
+
+static inline int security_dentry_init_security(struct dentry *dentry,
+						 int mode,
+						 struct qstr *name,
+						 void **ctx,
+						 u32 *ctxlen)
+{
+	return -EOPNOTSUPP;
+}
+
 
 static inline int security_inode_init_security(struct inode *inode,
 						struct inode *dir,
···
 static inline int security_netlink_send(struct sock *sk, struct sk_buff *skb)
 {
 	return cap_netlink_send(sk, skb);
+}
+
+static inline int security_ismaclabel(const char *name)
+{
+	return 0;
 }
 
 static inline int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)

security/capability.c

···
 }
 
 static int cap_sb_set_mnt_opts(struct super_block *sb,
-			       struct security_mnt_opts *opts)
+			       struct security_mnt_opts *opts,
+			       unsigned long kern_flags,
+			       unsigned long *set_kern_flags)
+
 {
 	if (unlikely(opts->num_mnt_opts))
 		return -EOPNOTSUPP;
···
 }
 
 static int cap_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
+{
+	return 0;
+}
+
+static int cap_dentry_init_security(struct dentry *dentry, int mode,
+					struct qstr *name, void **ctx,
+					u32 *ctxlen)
 {
 	return 0;
 }
···
 	return -EINVAL;
 }
 
+static int cap_ismaclabel(const char *name)
+{
+	return 0;
+}
+
 static int cap_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
 {
 	return -EOPNOTSUPP;
···
 	set_to_cap_if_null(ops, sb_set_mnt_opts);
 	set_to_cap_if_null(ops, sb_clone_mnt_opts);
 	set_to_cap_if_null(ops, sb_parse_opts_str);
+	set_to_cap_if_null(ops, dentry_init_security);
 	set_to_cap_if_null(ops, inode_alloc_security);
 	set_to_cap_if_null(ops, inode_free_security);
 	set_to_cap_if_null(ops, inode_init_security);
···
 	set_to_cap_if_null(ops, d_instantiate);
 	set_to_cap_if_null(ops, getprocattr);
 	set_to_cap_if_null(ops, setprocattr);
+	set_to_cap_if_null(ops, ismaclabel);
 	set_to_cap_if_null(ops, secid_to_secctx);
 	set_to_cap_if_null(ops, secctx_to_secid);
 	set_to_cap_if_null(ops, release_secctx);

security/security.c

···
  */
 
 #include <linux/capability.h>
+#include <linux/dcache.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
···
 }
 
 int security_sb_set_mnt_opts(struct super_block *sb,
-				struct security_mnt_opts *opts)
+				struct security_mnt_opts *opts,
+				unsigned long kern_flags,
+				unsigned long *set_kern_flags)
 {
-	return security_ops->sb_set_mnt_opts(sb, opts);
+	return security_ops->sb_set_mnt_opts(sb, opts, kern_flags,
+						set_kern_flags);
 }
 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 
···
 	integrity_inode_free(inode);
 	security_ops->inode_free_security(inode);
 }
+
+int security_dentry_init_security(struct dentry *dentry, int mode,
+					struct qstr *name, void **ctx,
+					u32 *ctxlen)
+{
+	return security_ops->dentry_init_security(dentry, mode, name,
+							ctx, ctxlen);
+}
+EXPORT_SYMBOL(security_dentry_init_security);
 
 int security_inode_init_security(struct inode *inode, struct inode *dir,
 				 const struct qstr *qstr,
···
 		return 0;
 	return security_ops->inode_listsecurity(inode, buffer, buffer_size);
 }
+EXPORT_SYMBOL(security_inode_listsecurity);
 
 void security_inode_getsecid(const struct inode *inode, u32 *secid)
 {
···
 {
 	return security_ops->netlink_send(sk, skb);
 }
+
+int security_ismaclabel(const char *name)
+{
+	return security_ops->ismaclabel(name);
+}
+EXPORT_SYMBOL(security_ismaclabel);
 
 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
 {

security/selinux/hooks.c

···
 #include <linux/syslog.h>
 #include <linux/user_namespace.h>
 #include <linux/export.h>
+#include <linux/security.h>
 #include <linux/msg.h>
 #include <linux/shm.h>
 
···
 
 /* The file system's label must be initialized prior to use. */
 
-static const char *labeling_behaviors[6] = {
+static const char *labeling_behaviors[7] = {
 	"uses xattr",
 	"uses transition SIDs",
 	"uses task SIDs",
 	"uses genfs_contexts",
 	"not configured for labeling",
 	"uses mountpoint labeling",
+	"uses native labeling",
 };
 
 static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dentry);
···
  * labeling information.
  */
 static int selinux_set_mnt_opts(struct super_block *sb,
-				struct security_mnt_opts *opts)
+				struct security_mnt_opts *opts,
+				unsigned long kern_flags,
+				unsigned long *set_kern_flags)
 {
 	const struct cred *cred = current_cred();
 	int rc = 0, i;
···
 		rc = -EINVAL;
 		printk(KERN_WARNING "SELinux: Unable to set superblock options "
 			"before the security server is initialized\n");
+		goto out;
+	}
+	if (kern_flags && !set_kern_flags) {
+		/* Specifying internal flags without providing a place to
+		 * place the results is not allowed */
+		rc = -EINVAL;
 		goto out;
 	}
 
···
 	if (strcmp(sb->s_type->name, "proc") == 0)
 		sbsec->flags |= SE_SBPROC;
 
-	/* Determine the labeling behavior to use for this filesystem type. */
-	rc = security_fs_use((sbsec->flags & SE_SBPROC) ? "proc" : sb->s_type->name, &sbsec->behavior, &sbsec->sid);
-	if (rc) {
-		printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n",
-		       __func__, sb->s_type->name, rc);
-		goto out;
+	if (!sbsec->behavior) {
+		/*
+		 * Determine the labeling behavior to use for this
+		 * filesystem type.
+		 */
+		rc = security_fs_use((sbsec->flags & SE_SBPROC) ?
+					"proc" : sb->s_type->name,
+					&sbsec->behavior, &sbsec->sid);
+		if (rc) {
+			printk(KERN_WARNING
+				"%s: security_fs_use(%s) returned %d\n",
+					__func__, sb->s_type->name, rc);
+			goto out;
+		}
 	}
-
 	/* sets the context of the superblock for the fs being mounted. */
 	if (fscontext_sid) {
 		rc = may_context_mount_sb_relabel(fscontext_sid, sbsec, cred);
···
 	 * sets the label used on all file below the mountpoint, and will set
 	 * the superblock context if not already set.
 	 */
+	if (kern_flags & SECURITY_LSM_NATIVE_LABELS && !context_sid) {
+		sbsec->behavior = SECURITY_FS_USE_NATIVE;
+		*set_kern_flags |= SECURITY_LSM_NATIVE_LABELS;
+	}
+
 	if (context_sid) {
 		if (!fscontext_sid) {
 			rc = may_context_mount_sb_relabel(context_sid, sbsec,
···
 	}
 
 	if (defcontext_sid) {
-		if (sbsec->behavior != SECURITY_FS_USE_XATTR) {
+		if (sbsec->behavior != SECURITY_FS_USE_XATTR &&
+			sbsec->behavior != SECURITY_FS_USE_NATIVE) {
 			rc = -EINVAL;
 			printk(KERN_WARNING "SELinux: defcontext option is "
 			       "invalid for this filesystem type\n");
···
 		goto out_err;
 
 out:
-	rc = selinux_set_mnt_opts(sb, &opts);
+	rc = selinux_set_mnt_opts(sb, &opts, 0, NULL);
 
 out_err:
 	security_free_mnt_opts(&opts);
···
 	}
 
 	switch (sbsec->behavior) {
+	case SECURITY_FS_USE_NATIVE:
+		break;
 	case SECURITY_FS_USE_XATTR:
 		if (!inode->i_op->getxattr) {
 			isec->sid = sbsec->def_sid;
···
 	inode_free_security(inode);
 }
 
+static int selinux_dentry_init_security(struct dentry *dentry, int mode,
+					struct qstr *name, void **ctx,
+					u32 *ctxlen)
+{
+	const struct cred *cred = current_cred();
+	struct task_security_struct *tsec;
+	struct inode_security_struct *dsec;
+	struct superblock_security_struct *sbsec;
+	struct inode *dir = dentry->d_parent->d_inode;
+	u32 newsid;
+	int rc;
+
+	tsec = cred->security;
+	dsec = dir->i_security;
+	sbsec = dir->i_sb->s_security;
+
+	if (tsec->create_sid && sbsec->behavior != SECURITY_FS_USE_MNTPOINT) {
+		newsid = tsec->create_sid;
+	} else {
+		rc = security_transition_sid(tsec->sid, dsec->sid,
+					     inode_mode_to_security_class(mode),
+					     name,
+					     &newsid);
+		if (rc) {
+			printk(KERN_WARNING
+				"%s: security_transition_sid failed, rc=%d\n",
+			       __func__, -rc);
+			return rc;
+		}
+	}
+
+	return security_sid_to_context(newsid, (char **)ctx, ctxlen);
+}
+
 static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
 				       const struct qstr *qstr, char **name,
 				       void **value, size_t *len)
···
 		return;
 	}
 
+	isec->sclass = inode_mode_to_security_class(inode->i_mode);
 	isec->sid = newsid;
+	isec->initialized = 1;
+
 	return;
 }
 
···
 	if (rc)
 		return rc;
 
+	isec->sclass = inode_mode_to_security_class(inode->i_mode);
 	isec->sid = newsid;
 	isec->initialized = 1;
 	return 0;
···
 	return error;
 }
 
+static int selinux_ismaclabel(const char *name)
+{
+	return (strcmp(name, XATTR_SELINUX_SUFFIX) == 0);
+}
+
 static int selinux_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
 {
 	return security_sid_to_context(secid, secdata, seclen);
···
 	.sb_clone_mnt_opts =		selinux_sb_clone_mnt_opts,
 	.sb_parse_opts_str = 		selinux_parse_opts_str,
 
+	.dentry_init_security =		selinux_dentry_init_security,
 
 	.inode_alloc_security =		selinux_inode_alloc_security,
 	.inode_free_security =		selinux_inode_free_security,
···
 	.getprocattr =			selinux_getprocattr,
 	.setprocattr =			selinux_setprocattr,
 
+	.ismaclabel =			selinux_ismaclabel,
 	.secid_to_secctx =		selinux_secid_to_secctx,
 	.secctx_to_secid =		selinux_secctx_to_secid,
 	.release_secctx =		selinux_release_secctx,

security/selinux/include/security.h

···
 #define SECURITY_FS_USE_GENFS		4 /* use the genfs support */
 #define SECURITY_FS_USE_NONE		5 /* no labeling support */
 #define SECURITY_FS_USE_MNTPOINT	6 /* use mountpoint labeling */
+#define SECURITY_FS_USE_NATIVE		7 /* use native label support */
+#define SECURITY_FS_USE_MAX		7 /* Highest SECURITY_FS_USE_XXX */
 
 int security_fs_use(const char *fstype, unsigned int *behavior,
 	u32 *sid);

security/selinux/ss/policydb.c

···
 
 				rc = -EINVAL;
 				c->v.behavior = le32_to_cpu(buf[0]);
-				if (c->v.behavior > SECURITY_FS_USE_NONE)
+				/* Determined at runtime, not in policy DB. */
+				if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
+					goto out;
+				if (c->v.behavior > SECURITY_FS_USE_MAX)
 					goto out;
 
 				rc = -ENOMEM;

security/smack/smack_lsm.c

···
 #endif /* CONFIG_AUDIT */
 
 /**
+ * smack_ismaclabel - check if xattr @name references a smack MAC label
+ * @name: Full xattr name to check.
+ */
+static int smack_ismaclabel(const char *name)
+{
+	return (strcmp(name, XATTR_SMACK_SUFFIX) == 0);
+}
+
+
+/**
  * smack_secid_to_secctx - return the smack label for a secid
  * @secid: incoming integer
  * @secdata: destination
···
 	.audit_rule_free =		smack_audit_rule_free,
 #endif /* CONFIG_AUDIT */
 
+	.ismaclabel =			smack_ismaclabel,
 	.secid_to_secctx = 		smack_secid_to_secctx,
 	.secctx_to_secid = 		smack_secctx_to_secid,
 	.release_secctx = 		smack_release_secctx,