]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Manage.c
2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
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
));
115 fprintf(stderr
, Name
": stopped %s\n", devname
);
120 int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
)
122 mdu_array_info_t info
;
123 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
124 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
125 devname
, strerror(errno
));
131 info
.raid_disks
= raid_disks
;
132 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
133 fprintf(stderr
, Name
": Cannot set device size/shape for %s: %s\n",
134 devname
, strerror(errno
));
140 int Manage_reconfig(char *devname
, int fd
, int layout
)
142 mdu_array_info_t info
;
143 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
144 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
145 devname
, strerror(errno
));
148 info
.layout
= layout
;
149 printf("layout set to %d\n", info
.layout
);
150 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
151 fprintf(stderr
, Name
": Cannot set layout for %s: %s\n",
152 devname
, strerror(errno
));
158 int Manage_subdevs(char *devname
, int fd
,
159 mddev_dev_t devlist
, int verbose
)
161 /* do something to each dev.
163 * 'a' - add the device
165 * If that fails EINVAL, try ADD_NEW_DISK
166 * 'r' - remove the device HOT_REMOVE_DISK
167 * 'f' - set the device faulty SET_DISK_FAULTY
169 mdu_array_info_t array
;
170 mdu_disk_info_t disc
;
175 struct supertype
*st
;
177 void *osuper
= NULL
; /* original super */
181 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
182 fprintf(stderr
, Name
": cannot get array info for %s\n",
186 for (dv
= devlist
; dv
; dv
=dv
->next
) {
187 if (stat(dv
->devname
, &stb
)) {
188 fprintf(stderr
, Name
": cannot find %s: %s\n",
189 dv
->devname
, strerror(errno
));
192 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
193 fprintf(stderr
, Name
": %s is not a block device.\n",
197 switch(dv
->disposition
){
199 fprintf(stderr
, Name
": internal error - devmode[%s]=%d\n",
200 dv
->devname
, dv
->disposition
);
203 /* add the device - hot or cold */
204 st
= super_by_version(array
.major_version
,
205 array
.minor_version
);
207 fprintf(stderr
, Name
": unsupport array - version %d.%d\n",
208 array
.major_version
, array
.minor_version
);
212 /* Make sure it isn't in use (in 2.6 or later) */
213 tfd
= open(dv
->devname
, O_RDONLY
|O_EXCL
);
215 fprintf(stderr
, Name
": Cannot open %s: %s\n",
216 dv
->devname
, strerror(errno
));
219 if (array
.not_persistent
==0)
220 st
->ss
->load_super(st
, tfd
, &osuper
, NULL
);
221 /* will use osuper later */
224 if (array
.major_version
== 0 &&
225 md_get_version(fd
)%100 < 2) {
226 if (ioctl(fd
, HOT_ADD_DISK
,
227 (unsigned long)stb
.st_rdev
)==0) {
229 fprintf(stderr
, Name
": hot added %s\n",
234 fprintf(stderr
, Name
": hot add failed for %s: %s\n",
235 dv
->devname
, strerror(errno
));
239 if (array
.not_persistent
== 0) {
241 /* need to find a sample superblock to copy, and
242 * a spare slot to use
244 for (j
=0; j
<st
->max_devs
; j
++) {
248 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
250 if (disc
.major
==0 && disc
.minor
==0)
252 if ((disc
.state
& 4)==0) continue; /* sync */
253 /* Looks like a good device to try */
254 dev
= map_dev(disc
.major
, disc
.minor
, 1);
256 dfd
= dev_open(dev
, O_RDONLY
);
257 if (dfd
< 0) continue;
258 if (st
->ss
->load_super(st
, dfd
, &dsuper
, NULL
)) {
266 fprintf(stderr
, Name
": cannot find valid superblock in this array - HELP\n");
269 /* Possibly this device was recently part of the array
270 * and was temporarily removed, and is now being re-added.
271 * If so, we can simply re-add it.
273 st
->ss
->uuid_from_super(duuid
, dsuper
);
276 st
->ss
->uuid_from_super(ouuid
, osuper
);
277 if (memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
278 /* look close enough for now. Kernel
279 * will worry about where a bitmap
280 * based reconstruct is possible
283 st
->ss
->getinfo_super(&mdi
, osuper
);
284 disc
.major
= major(stb
.st_rdev
);
285 disc
.minor
= minor(stb
.st_rdev
);
286 disc
.number
= mdi
.disk
.number
;
287 disc
.raid_disk
= mdi
.disk
.raid_disk
;
288 disc
.state
= mdi
.disk
.state
;
289 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
291 fprintf(stderr
, Name
": re-added %s\n", dv
->devname
);
294 /* fall back on normal-add */
298 for (j
=0; j
< st
->max_devs
; j
++) {
300 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
302 if (disc
.major
==0 && disc
.minor
==0)
304 if (disc
.state
& 8) /* removed */
307 disc
.major
= major(stb
.st_rdev
);
308 disc
.minor
= minor(stb
.st_rdev
);
311 if (array
.not_persistent
==0) {
313 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
314 st
->ss
->add_to_super(dsuper
, &disc
);
315 if (st
->ss
->write_init_super(st
, dsuper
, &disc
, dv
->devname
))
317 } else if (dv
->re_add
) {
318 /* this had better be raid1.
319 * As we are "--re-add"ing we must find a spare slot
322 char *used
= malloc(array
.raid_disks
);
323 memset(used
, 0, array
.raid_disks
);
324 for (j
=0; j
< st
->max_devs
; j
++) {
325 mdu_disk_info_t disc2
;
327 if (ioctl(fd
, GET_DISK_INFO
, &disc2
))
329 if (disc2
.major
==0 && disc2
.minor
==0)
331 if (disc2
.state
& 8) /* removed */
333 if (disc2
.raid_disk
< 0)
335 if (disc2
.raid_disk
> array
.raid_disks
)
337 used
[disc2
.raid_disk
] = 1;
339 for (j
=0 ; j
<array
.raid_disks
; j
++)
342 disc
.state
|= (1<<MD_DISK_SYNC
);
347 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
348 if (ioctl(fd
,ADD_NEW_DISK
, &disc
)) {
349 fprintf(stderr
, Name
": add new device failed for %s as %d: %s\n",
350 dv
->devname
, j
, strerror(errno
));
354 fprintf(stderr
, Name
": added %s\n", dv
->devname
);
359 /* FIXME check that it is a current member */
360 if (ioctl(fd
, HOT_REMOVE_DISK
, (unsigned long)stb
.st_rdev
)) {
361 fprintf(stderr
, Name
": hot remove failed for %s: %s\n",
362 dv
->devname
, strerror(errno
));
366 fprintf(stderr
, Name
": hot removed %s\n", dv
->devname
);
369 case 'f': /* set faulty */
370 /* FIXME check current member */
371 if (ioctl(fd
, SET_DISK_FAULTY
, (unsigned long) stb
.st_rdev
)) {
372 fprintf(stderr
, Name
": set device faulty failed for %s: %s\n",
373 dv
->devname
, strerror(errno
));
377 fprintf(stderr
, Name
": set %s faulty in %s\n",
378 dv
->devname
, devname
);