1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <meta.h>
#include <regex.h>
#include <devfsadm.h>
#include <stdio.h>
#include <strings.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/mkdev.h>
#include <sdssc.h>
#define MD_LINK_RE_DEVICES "^md/r?dsk/.+$"
#define MD_LINK_RE_SHARED "^md/shared/[0-9]+/r?dsk/.+$"
#define MD_LINK_RE_ADMIN "^md/admin"
/*
* The devfsadm link module require the next section to
* be defined in order to know what and when to call functions
* in the module on device creation and removal.
*/
/* setup for device creation */
static int md_create(di_minor_t minor, di_node_t node);
static devfsadm_create_t md_cbt[] = {
{ "pseudo", "ddi_pseudo", "md",
TYPE_EXACT | DRV_EXACT, ILEVEL_0, md_create,
},
};
DEVFSADM_CREATE_INIT_V0(md_cbt);
/*
* remove devices - always allow disks to be dynamically removed. Only allow
* admin device to be removed at reboot.
*/
static devfsadm_remove_t md_remove_cbt[] = {
{"pseudo", MD_LINK_RE_DEVICES, RM_ALWAYS | RM_PRE | RM_HOT,
ILEVEL_0, devfsadm_rm_all},
{"pseudo", MD_LINK_RE_SHARED, RM_ALWAYS | RM_PRE | RM_HOT,
ILEVEL_0, devfsadm_rm_all},
{"pseudo", MD_LINK_RE_ADMIN, RM_ALWAYS | RM_PRE,
ILEVEL_0, devfsadm_rm_all},
};
DEVFSADM_REMOVE_INIT_V0(md_remove_cbt);
/*
* For the admin device:
* /dev/md/admin -> /devices/pseudo/md@0:admin
*
* For metadevice:
* /dev/md/dsk/foobar --> /devices/pseudo/md@0:0,100,blk
* /dev/md/rdsk/foobar --> /devices/pseudo/md@0:0,100,raw
*
* Where 'foobar' is user specified arbitrary name and '100'
* is the minor number returned by MD_IOCMAKE_DEV ioctl
*
*/
static int
md_create(di_minor_t minor, di_node_t node)
{
char mn[MAXNAMELEN + 1];
char path[PATH_MAX + 1];
char set_path[PATH_MAX +1];
char sym_path[PATH_MAX + 1];
int set = -1, ret;
char *type, *dir;
char *device_name;
dev_t minor_devt = di_minor_devt(minor);
int key;
mdsetname_t *sp = NULL;
md_error_t ep;
/*
* Initialize sdssc entry points. Don't worry about the return
* value here since the interface functions will get initialized
* correctly regardless.
*/
(void) sdssc_bind_library();
(void) strcpy(mn, di_minor_name(minor));
/*
* Check whether we are being requested to setup the admin
* device link or one of the metadevice links. They need
* to be treated differently.
*/
if (strcmp(mn, "admin") == 0) {
/* there is only one admin link and always in /dev/md/admin */
(void) devfsadm_mklink("md/admin", node, minor, 0);
} else {
/*
* Extract out the minor components and create the
* appropriate links. The node looks like:
* md@<set>,<mdev>,<type>
* where the <set> number is the named diskset,
* <mdev> is the metadevice number, and <type>
* is the trailing "blk" or "raw" indication.
*
* NOTE: when <set> is non-zero, we need to create
* under the "shared" directory entry instead of linking
* into the top level dsk/rdsk directories.
*/
ret = sscanf(mn, "%d,", &set);
if (ret == 1 && (type = strrchr(mn, ',')) != NULL) {
type++;
if (strcmp(type, "blk") == 0) {
dir = "dsk";
} else {
dir = "rdsk";
}
(void) memset(&ep, '\0', sizeof (ep));
if ((device_name = meta_getnmentbydev(set,
MD_SIDEWILD, minor_devt, NULL, NULL,
&key, &ep)) == NULL) {
(void) close_admin(&ep);
return (DEVFSADM_CONTINUE);
}
if (set == 0) {
/* this is a simple md */
(void) snprintf(path, sizeof (path),
"md/%s/%s", dir, basename(device_name));
} else {
/* this is a shared md */
(void) snprintf(path, sizeof (path),
"md/shared/%d/%s/%s", set, dir,
basename(device_name));
/*
* flush the caches so the next call to
* metasetnosetname will get us the
* updated cache.
*/
metaflushnames(0);
if ((sp = metasetnosetname(set, &ep))
!= NULL) {
(void) snprintf(set_path,
sizeof (set_path), "md/shared/%d",
sp->setno);
(void) snprintf(sym_path,
sizeof (sym_path), "md/%s",
sp->setname);
}
}
(void) devfsadm_mklink(path, node, minor, 0);
Free(device_name);
if (sp != NULL) {
(void) devfsadm_secondary_link(sym_path,
set_path, 0);
}
}
}
(void) close_admin(&ep);
return (DEVFSADM_CONTINUE);
}
|
