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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Neil Brown
* Email: <neilb@cse.unsw.edu.au>
* Paper: Neil Brown
* School of Computer Science and Engineering
* The University of New South Wales
* Sydney, 2052
* Australia
*/
#include "mdadm.h"
#include "md_u.h"
#include "md_p.h"
#define REGISTER_DEV _IO (MD_MAJOR, 1)
#define START_MD _IO (MD_MAJOR, 2)
#define STOP_MD _IO (MD_MAJOR, 3)
int Manage_ro(char *devname, int fd, int readonly)
{
/* switch to readonly or rw
*
* requires >= 0.90.0
* first check that array is runing
* use RESTART_ARRAY_RW or STOP_ARRAY_RO
*
*/
mdu_array_info_t array;
if (md_get_version(fd) < 9000) {
fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
return 1;
}
if (ioctl(fd, GET_ARRAY_INFO, &array)) {
fprintf(stderr, Name ": %s does not appear to be active.\n",
devname);
return 1;
}
if (readonly>0) {
if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
devname, strerror(errno));
return 1;
}
} else if (readonly < 0) {
if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
fprintf(stderr, Name ": failed to set writable for %s: %s\n",
devname, strerror(errno));
return 1;
}
}
return 0;
}
int Manage_runstop(char *devname, int fd, int runstop)
{
/* Run or stop the array. array must already be configured
* required >= 0.90.0
*/
mdu_param_t param; /* unused */
if (runstop == -1 && md_get_version(fd) < 9000) {
if (ioctl(fd, STOP_MD, 0)) {
fprintf(stderr, Name ": stopping device %s failed: %s\n",
devname, strerror(errno));
return 1;
}
}
if (md_get_version(fd) < 9000) {
fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
return 1;
}
/*
if (ioctl(fd, GET_ARRAY_INFO, &array)) {
fprintf(stderr, Name ": %s does not appear to be active.\n",
devname);
return 1;
}
*/
if (runstop>0) {
if (ioctl(fd, RUN_ARRAY, ¶m)) {
fprintf(stderr, Name ": failed to run array %s: %s\n",
devname, strerror(errno));
return 1;
}
} else if (runstop < 0){
if (ioctl(fd, STOP_ARRAY, NULL)) {
fprintf(stderr, Name ": fail to stop array %s: %s\n",
devname, strerror(errno));
return 1;
}
}
return 0;
}
int Manage_subdevs(char *devname, int fd,
mddev_dev_t devlist)
{
/* do something to each dev.
* devmode can be
* 'a' - add the device
* try HOT_ADD_DISK
* If that fails EINVAL, try ADD_NEW_DISK
* 'r' - remove the device HOT_REMOVE_DISK
* 'f' - set the device faulty SET_DISK_FAULTY
*/
mdu_array_info_t array;
mdu_disk_info_t disc;
mddev_dev_t dv;
struct stat stb;
int j;
int save_errno;
static char buf[4096];
if (ioctl(fd, GET_ARRAY_INFO, &array)) {
fprintf(stderr, Name ": cannot get array info for %s\n",
devname);
return 1;
}
for (dv = devlist ; dv; dv=dv->next) {
if (stat(dv->devname, &stb)) {
fprintf(stderr, Name ": cannot find %s: %s\n",
dv->devname, strerror(errno));
return 1;
}
if ((stb.st_mode & S_IFMT) != S_IFBLK) {
fprintf(stderr, Name ": %s is not a block device.\n",
dv->devname);
return 1;
}
switch(dv->disposition){
default:
fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
dv->devname, dv->disposition);
return 1;
case 'a':
/* add the device - hot or cold */
if (ioctl(fd, HOT_ADD_DISK, (unsigned long)stb.st_rdev)==0) {
fprintf(stderr, Name ": hot added %s\n",
dv->devname);
continue;
}
save_errno = errno;
if (read(fd, buf, sizeof(buf)) > 0) {
/* array is active, so don't try to add.
* i.e. something is wrong
*/
fprintf(stderr, Name ": hot add failed for %s: %s\n",
dv->devname, strerror(save_errno));
return 1;
}
/* try ADD_NEW_DISK.
* we might be creating, we might be assembling,
* it is hard to tell.
* set up number/raid_disk/state just
* in case
*/
for (j=0; j<array.nr_disks; j++) {
if (ioctl(fd, GET_DISK_INFO, &disc))
break;
if (disc.major==0 && disc.minor==0)
break;
if (disc.state & 8) /* removed */
break;
}
disc.number =j;
disc.raid_disk = j;
disc.state = 0;
disc.major = MAJOR(stb.st_rdev);
disc.minor = MINOR(stb.st_rdev);
if (ioctl(fd,ADD_NEW_DISK, &disc)) {
fprintf(stderr, Name ": add new disk failed for %s: %s\n",
dv->devname, strerror(errno));
return 1;
}
fprintf(stderr, Name ": added %s\n", dv->devname);
break;
case 'r':
/* hot remove */
/* FIXME check that it is a current member */
if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
fprintf(stderr, Name ": hot remove failed for %s: %s\n",
dv->devname, strerror(errno));
return 1;
}
fprintf(stderr, Name ": hot removed %s\n", dv->devname);
break;
case 'f': /* set faulty */
/* FIXME check current member */
if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
fprintf(stderr, Name ": set disk faulty failed for %s: %s\n",
dv->devname, strerror(errno));
return 1;
}
fprintf(stderr, Name ": set %s faulty in %s\n",
dv->devname, devname);
break;
}
}
return 0;
}
|
