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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2016 Toomas Soome <tsoome@me.com>
23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
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/mkdev.h>
34 #include <sys/lofi.h>
35
36
37 static int lofi(di_minor_t minor, di_node_t node);
38 static int lofi_rm_all(char *link);
39
40 /*
41 * devfs create callback register
42 */
43 static devfsadm_create_t lofi_create_cbt[] = {
44 { "pseudo", "ddi_pseudo", LOFI_DRIVER_NAME,
45 TYPE_EXACT | DRV_EXACT, ILEVEL_0, lofi,
46 },
47 };
48 DEVFSADM_CREATE_INIT_V0(lofi_create_cbt);
49
50 /*
51 * devfs cleanup register
52 */
53 static devfsadm_remove_V1_t lofi_remove_cbt[] = {
54 {"pseudo", "^r?lofi/[0-9]+$", RM_ALWAYS | RM_PRE | RM_HOT,
55 ILEVEL_0, lofi_rm_all},
56 };
57 DEVFSADM_REMOVE_INIT_V1(lofi_remove_cbt);
58
59 /*
60 * Wrapper around devfsadm_rm_all() that allows termination of remove
61 * process
62 */
63 static int
lofi_rm_all(char * link)64 lofi_rm_all(char *link)
65 {
66 devfsadm_rm_all(link);
67 return (DEVFSADM_TERMINATE);
68 }
69
70
71 /*
72 * For the master device:
73 * /dev/lofictl -> /devices/pseudo/lofi@0:ctl
74 * For each other device
75 * /dev/lofi/1 -> /devices/pseudo/lofi@1:disk
76 * /dev/rlofi/1 -> /devices/pseudo/lofi@1:disk,raw
77 */
78 static int
lofi(di_minor_t minor,di_node_t node)79 lofi(di_minor_t minor, di_node_t node)
80 {
81 int instance;
82 char mn[MAXNAMELEN + 1];
83 char path[PATH_MAX + 1];
84
85 (void) strcpy(mn, di_minor_name(minor));
86
87 if (strcmp(mn, "ctl") == 0) {
88 (void) devfsadm_mklink(LOFI_CTL_NAME, node, minor, 0);
89 } else {
90 instance = di_instance(node);
91
92 if (strcmp(mn, LOFI_BLOCK_NODE) == 0) {
93 (void) snprintf(path, sizeof (path), "%s/%d",
94 LOFI_BLOCK_NAME, instance);
95 } else if (strcmp(mn, LOFI_CHAR_NODE) == 0) {
96 (void) snprintf(path, sizeof (path), "%s/%d",
97 LOFI_CHAR_NAME, instance);
98 } else {
99 return (DEVFSADM_CONTINUE);
100 }
101
102 (void) devfsadm_mklink(path, node, minor, 0);
103 }
104 return (DEVFSADM_CONTINUE);
105 }
106