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 #include <regex.h>
28 #include <devfsadm.h>
29 #include <stdio.h>
30 #include <strings.h>
31 #include <stdlib.h>
32 #include <limits.h>
33 #include <sys/fssnap_if.h>
34
35
36 static int fssnap(di_minor_t minor, di_node_t node);
37
38 static devfsadm_create_t fssnap_cbt[] = {
39 { "pseudo", "ddi_pseudo", SNAP_NAME,
40 TYPE_EXACT | DRV_EXACT, ILEVEL_0, fssnap,
41 },
42 };
43
44 DEVFSADM_CREATE_INIT_V0(fssnap_cbt);
45
46 /*
47 * For the master device:
48 * /dev/fssnapctl -> /devices/pseudo/fssnap@0:ctl
49 * For each other device
50 * /dev/fssnap/1 -> /devices/pseudo/fssnap@0:1
51 * /dev/rfssnap/1 -> /devices/pseudo/fssnap@0:1,raw
52 */
53 static int
fssnap(di_minor_t minor,di_node_t node)54 fssnap(di_minor_t minor, di_node_t node)
55 {
56 dev_t dev;
57 char mn[MAXNAMELEN + 1];
58 char blkname[MAXNAMELEN + 1];
59 char rawname[MAXNAMELEN + 1];
60 char path[PATH_MAX + 1];
61
62 (void) strcpy(mn, di_minor_name(minor));
63
64 if (strcmp(mn, "ctl") == 0) {
65 (void) devfsadm_mklink(SNAP_CTL_NAME, node, minor, 0);
66 } else {
67 dev = di_minor_devt(minor);
68 (void) snprintf(blkname, sizeof (blkname), "%d",
69 (int)minor(dev));
70 (void) snprintf(rawname, sizeof (rawname), "%d,raw",
71 (int)minor(dev));
72
73 if (strcmp(mn, blkname) == 0) {
74 (void) snprintf(path, sizeof (path), "%s/%s",
75 SNAP_BLOCK_NAME, blkname);
76 } else if (strcmp(mn, rawname) == 0) {
77 (void) snprintf(path, sizeof (path), "%s/%s",
78 SNAP_CHAR_NAME, blkname);
79 } else {
80 return (DEVFSADM_CONTINUE);
81 }
82
83 (void) devfsadm_mklink(path, node, minor, 0);
84 }
85 return (DEVFSADM_CONTINUE);
86 }
87