]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Manage.c
2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Email: <neilb@cse.unsw.edu.au>
24 * School of Computer Science and Engineering
25 * The University of New South Wales
34 #define REGISTER_DEV _IO (MD_MAJOR, 1)
35 #define START_MD _IO (MD_MAJOR, 2)
36 #define STOP_MD _IO (MD_MAJOR, 3)
38 int Manage_ro(char *devname
, int fd
, int readonly
)
40 /* switch to readonly or rw
43 * first check that array is runing
44 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
47 mdu_array_info_t array
;
49 if (md_get_version(fd
) < 9000) {
50 fprintf(stderr
, Name
": need md driver version 0.90.0 or later\n");
53 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
54 fprintf(stderr
, Name
": %s does not appear to be active.\n",
60 if (ioctl(fd
, STOP_ARRAY_RO
, NULL
)) {
61 fprintf(stderr
, Name
": failed to set readonly for %s: %s\n",
62 devname
, strerror(errno
));
65 } else if (readonly
< 0) {
66 if (ioctl(fd
, RESTART_ARRAY_RW
, NULL
)) {
67 fprintf(stderr
, Name
": failed to set writable for %s: %s\n",
68 devname
, strerror(errno
));
75 int Manage_runstop(char *devname
, int fd
, int runstop
, int quiet
)
77 /* Run or stop the array. array must already be configured
80 mdu_param_t param
; /* unused */
82 if (runstop
== -1 && md_get_version(fd
) < 9000) {
83 if (ioctl(fd
, STOP_MD
, 0)) {
84 if (!quiet
) fprintf(stderr
, Name
": stopping device %s failed: %s\n",
85 devname
, strerror(errno
));
90 if (md_get_version(fd
) < 9000) {
91 fprintf(stderr
, Name
": need md driver version 0.90.0 or later\n");
95 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
96 fprintf(stderr, Name ": %s does not appear to be active.\n",
102 if (ioctl(fd
, RUN_ARRAY
, ¶m
)) {
103 fprintf(stderr
, Name
": failed to run array %s: %s\n",
104 devname
, strerror(errno
));
107 } else if (runstop
< 0){
108 if (ioctl(fd
, STOP_ARRAY
, NULL
)) {
110 fprintf(stderr
, Name
": fail to stop array %s: %s\n",
111 devname
, strerror(errno
));
118 int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
)
120 mdu_array_info_t info
;
121 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
122 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
123 devname
, strerror(errno
));
129 info
.raid_disks
= raid_disks
;
130 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
131 fprintf(stderr
, Name
": Cannot set device size/shape for %s: %s\n",
132 devname
, strerror(errno
));
138 int Manage_reconfig(char *devname
, int fd
, int layout
)
140 mdu_array_info_t info
;
141 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
142 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
143 devname
, strerror(errno
));
146 info
.layout
= layout
;
147 printf("layout set to %d\n", info
.layout
);
148 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
149 fprintf(stderr
, Name
": Cannot set layout for %s: %s\n",
150 devname
, strerror(errno
));
156 int Manage_subdevs(char *devname
, int fd
,
159 /* do something to each dev.
161 * 'a' - add the device
163 * If that fails EINVAL, try ADD_NEW_DISK
164 * 'r' - remove the device HOT_REMOVE_DISK
165 * 'f' - set the device faulty SET_DISK_FAULTY
167 mdu_array_info_t array
;
168 mdu_disk_info_t disc
;
173 struct supertype
*st
;
176 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
177 fprintf(stderr
, Name
": cannot get array info for %s\n",
181 for (dv
= devlist
; dv
; dv
=dv
->next
) {
182 if (stat(dv
->devname
, &stb
)) {
183 fprintf(stderr
, Name
": cannot find %s: %s\n",
184 dv
->devname
, strerror(errno
));
187 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
188 fprintf(stderr
, Name
": %s is not a block device.\n",
192 switch(dv
->disposition
){
194 fprintf(stderr
, Name
": internal error - devmode[%s]=%d\n",
195 dv
->devname
, dv
->disposition
);
198 /* add the device - hot or cold */
199 /* Make sure it isn' in use (in 2.6 or later) */
200 tfd
= open(dv
->devname
, O_RDONLY
|O_EXCL
);
202 fprintf(stderr
, Name
": Cannot open %s: %s\n",
203 dv
->devname
, strerror(errno
));
208 if (array
.major_version
== 0) {
210 if (md_get_version(fd
)%100 < 2) {
212 if (ioctl(fd
, HOT_ADD_DISK
,
213 (unsigned long)stb
.st_rdev
)==0) {
214 fprintf(stderr
, Name
": hot added %s\n",
219 fprintf(stderr
, Name
": hot add failed for %s: %s\n",
220 dv
->devname
, strerror(errno
));
224 /* need to find a sample superblock to copy, and
225 * a spare slot to use
227 st
= super_by_version(array
.major_version
,
228 array
.minor_version
);
230 fprintf(stderr
, Name
": unsupport array - version %d.%d\n",
231 array
.major_version
, array
.minor_version
);
234 for (j
=0; j
<array
.raid_disks
+array
.spare_disks
+ array
.failed_disks
; j
++) {
238 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
240 if (disc
.major
==0 && disc
.minor
==0)
242 if ((disc
.state
& 4)==0) continue; /* sync */
243 /* Looks like a good device to try */
244 dev
= map_dev(disc
.major
, disc
.minor
);
246 dfd
= open(dev
, O_RDONLY
);
247 if (dfd
< 0) continue;
248 if (st
->ss
->load_super(st
, dfd
, &dsuper
, NULL
)) {
256 fprintf(stderr
, Name
": cannot find valid superblock in this array - HELP\n");
259 for (j
=0; j
<array
.nr_disks
; j
++) {
261 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
263 if (disc
.major
==0 && disc
.minor
==0)
265 if (disc
.state
& 8) /* removed */
268 disc
.major
= major(stb
.st_rdev
);
269 disc
.minor
= minor(stb
.st_rdev
);
272 if (st
->ss
->write_init_super(st
, dsuper
, &disc
, dv
->devname
))
274 if (ioctl(fd
,ADD_NEW_DISK
, &disc
)) {
275 fprintf(stderr
, Name
": add new device failed for %s: %s\n",
276 dv
->devname
, strerror(errno
));
279 fprintf(stderr
, Name
": added %s\n", dv
->devname
);
284 /* FIXME check that it is a current member */
285 if (ioctl(fd
, HOT_REMOVE_DISK
, (unsigned long)stb
.st_rdev
)) {
286 fprintf(stderr
, Name
": hot remove failed for %s: %s\n",
287 dv
->devname
, strerror(errno
));
290 fprintf(stderr
, Name
": hot removed %s\n", dv
->devname
);
293 case 'f': /* set faulty */
294 /* FIXME check current member */
295 if (ioctl(fd
, SET_DISK_FAULTY
, (unsigned long) stb
.st_rdev
)) {
296 fprintf(stderr
, Name
": set device faulty failed for %s: %s\n",
297 dv
->devname
, strerror(errno
));
300 fprintf(stderr
, Name
": set %s faulty in %s\n",
301 dv
->devname
, devname
);