xref: /illumos-gate/usr/src/cmd/devfsadm/zfs_link.c (revision 681d9761)
1fa9e4066Sahrens /*
2fa9e4066Sahrens  * CDDL HEADER START
3fa9e4066Sahrens  *
4fa9e4066Sahrens  * The contents of this file are subject to the terms of the
5*681d9761SEric Taylor  * Common Development and Distribution License (the "License").
6*681d9761SEric Taylor  * You may not use this file except in compliance with the License.
7fa9e4066Sahrens  *
8fa9e4066Sahrens  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9fa9e4066Sahrens  * or http://www.opensolaris.org/os/licensing.
10fa9e4066Sahrens  * See the License for the specific language governing permissions
11fa9e4066Sahrens  * and limitations under the License.
12fa9e4066Sahrens  *
13fa9e4066Sahrens  * When distributing Covered Code, include this CDDL HEADER in each
14fa9e4066Sahrens  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15fa9e4066Sahrens  * If applicable, add the following below this CDDL HEADER, with the
16fa9e4066Sahrens  * fields enclosed by brackets "[]" replaced with your own identifying
17fa9e4066Sahrens  * information: Portions Copyright [yyyy] [name of copyright owner]
18fa9e4066Sahrens  *
19fa9e4066Sahrens  * CDDL HEADER END
20fa9e4066Sahrens  */
21fa9e4066Sahrens /*
22*681d9761SEric Taylor  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23fa9e4066Sahrens  * Use is subject to license terms.
24fa9e4066Sahrens  */
26fa9e4066Sahrens #include <regex.h>
27fa9e4066Sahrens #include <devfsadm.h>
28fa9e4066Sahrens #include <stdio.h>
29fa9e4066Sahrens #include <strings.h>
30fa9e4066Sahrens #include <stdlib.h>
31fa9e4066Sahrens #include <limits.h>
32fa9e4066Sahrens #include <sys/mkdev.h>
33fa9e4066Sahrens #include <sys/fs/zfs.h>
35*681d9761SEric Taylor /* zfs name info */
37fa9e4066Sahrens static int zfs(di_minor_t minor, di_node_t node);
39fa9e4066Sahrens /*
40fa9e4066Sahrens  * devfs create callback register
41fa9e4066Sahrens  */
42fa9e4066Sahrens static devfsadm_create_t zfs_create_cbt[] = {
43fa9e4066Sahrens 	{ "pseudo", "ddi_pseudo", ZFS_DRIVER,
44fa9e4066Sahrens 	    TYPE_EXACT | DRV_EXACT, ILEVEL_0, zfs,
45fa9e4066Sahrens 	},
46fa9e4066Sahrens };
47fa9e4066Sahrens DEVFSADM_CREATE_INIT_V0(zfs_create_cbt);
49fa9e4066Sahrens /*
50*681d9761SEric Taylor  * The zfs control node looks like this:
51fa9e4066Sahrens  *	/dev/zfs -> /devices/pseudo/zfs@0:zfs
52fa9e4066Sahrens  */
53fa9e4066Sahrens static int
zfs(di_minor_t minor,di_node_t node)54fa9e4066Sahrens zfs(di_minor_t minor, di_node_t node)
55fa9e4066Sahrens {
56fa9e4066Sahrens 	char mn[MAXNAMELEN + 1];
58fa9e4066Sahrens 	(void) strcpy(mn, di_minor_name(minor));
60fa9e4066Sahrens 	if (strcmp(mn, ZFS_DRIVER) == 0) {
61fa9e4066Sahrens 		(void) devfsadm_mklink(ZFS_DRIVER, node, minor, 0);
62fa9e4066Sahrens 	}
63fa9e4066Sahrens 	return (DEVFSADM_CONTINUE);
64fa9e4066Sahrens }