1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 2000-2001 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <regex.h>
30#include <devfsadm.h>
31#include <stdio.h>
32#include <strings.h>
33#include <stdlib.h>
34#include <limits.h>
35#include <sys/fssnap_if.h>
36
37
38static int fssnap(di_minor_t minor, di_node_t node);
39
40static devfsadm_create_t fssnap_cbt[] = {
41	{ "pseudo", "ddi_pseudo", SNAP_NAME,
42	    TYPE_EXACT | DRV_EXACT, ILEVEL_0, fssnap,
43	},
44};
45
46DEVFSADM_CREATE_INIT_V0(fssnap_cbt);
47
48/*
49 * For the master device:
50 *	/dev/fssnapctl -> /devices/pseudo/fssnap@0:ctl
51 * For each other device
52 *	/dev/fssnap/1 -> /devices/pseudo/fssnap@0:1
53 *	/dev/rfssnap/1 -> /devices/pseudo/fssnap@0:1,raw
54 */
55static int
56fssnap(di_minor_t minor, di_node_t node)
57{
58	dev_t	dev;
59	char mn[MAXNAMELEN + 1];
60	char blkname[MAXNAMELEN + 1];
61	char rawname[MAXNAMELEN + 1];
62	char path[PATH_MAX + 1];
63
64	(void) strcpy(mn, di_minor_name(minor));
65
66	if (strcmp(mn, "ctl") == 0) {
67		(void) devfsadm_mklink(SNAP_CTL_NAME, node, minor, 0);
68	} else {
69		dev = di_minor_devt(minor);
70		(void) snprintf(blkname, sizeof (blkname), "%d",
71		    (int)minor(dev));
72		(void) snprintf(rawname, sizeof (rawname), "%d,raw",
73		    (int)minor(dev));
74
75		if (strcmp(mn, blkname) == 0) {
76			(void) snprintf(path, sizeof (path), "%s/%s",
77			    SNAP_BLOCK_NAME, blkname);
78		} else if (strcmp(mn, rawname) == 0) {
79			(void) snprintf(path, sizeof (path), "%s/%s",
80			    SNAP_CHAR_NAME, blkname);
81		} else {
82			return (DEVFSADM_CONTINUE);
83		}
84
85		(void) devfsadm_mklink(path, node, minor, 0);
86	}
87	return (DEVFSADM_CONTINUE);
88}
89