]>
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
));
77 int Manage_runstop(char *devname
, int fd
, int runstop
, int quiet
)
79 /* Run or stop the array. array must already be configured
82 mdu_param_t param
; /* unused */
84 if (runstop
== -1 && md_get_version(fd
) < 9000) {
85 if (ioctl(fd
, STOP_MD
, 0)) {
86 if (!quiet
) fprintf(stderr
, Name
": stopping device %s failed: %s\n",
87 devname
, strerror(errno
));
92 if (md_get_version(fd
) < 9000) {
93 fprintf(stderr
, Name
": need md driver version 0.90.0 or later\n");
97 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
98 fprintf(stderr, Name ": %s does not appear to be active.\n",
104 if (ioctl(fd
, RUN_ARRAY
, ¶m
)) {
105 fprintf(stderr
, Name
": failed to run array %s: %s\n",
106 devname
, strerror(errno
));
110 fprintf(stderr
, Name
": started %s\n", devname
);
111 } else if (runstop
< 0){
112 struct map_ent
*map
= NULL
;
114 if (ioctl(fd
, STOP_ARRAY
, NULL
)) {
116 fprintf(stderr
, Name
": fail to stop array %s: %s\n",
117 devname
, strerror(errno
));
119 fprintf(stderr
, "Perhaps a running "
120 "process, mounted filesystem "
121 "or active volume group?\n");
126 fprintf(stderr
, Name
": stopped %s\n", devname
);
127 if (fstat(fd
, &stb
) == 0) {
129 if (major(stb
.st_rdev
) == MD_MAJOR
)
130 devnum
= minor(stb
.st_rdev
);
132 devnum
= -1-(minor(stb
.st_rdev
)>>6);
133 map_delete(&map
, devnum
);
141 int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
)
143 mdu_array_info_t info
;
144 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
145 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
146 devname
, strerror(errno
));
152 info
.raid_disks
= raid_disks
;
153 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
154 fprintf(stderr
, Name
": Cannot set device size/shape for %s: %s\n",
155 devname
, strerror(errno
));
161 int Manage_reconfig(char *devname
, int fd
, int layout
)
163 mdu_array_info_t info
;
164 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
165 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
166 devname
, strerror(errno
));
169 info
.layout
= layout
;
170 printf("layout set to %d\n", info
.layout
);
171 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
172 fprintf(stderr
, Name
": Cannot set layout for %s: %s\n",
173 devname
, strerror(errno
));
179 int Manage_subdevs(char *devname
, int fd
,
180 mddev_dev_t devlist
, int verbose
)
182 /* do something to each dev.
184 * 'a' - add the device
186 * If that fails EINVAL, try ADD_NEW_DISK
187 * 'r' - remove the device HOT_REMOVE_DISK
188 * device can be 'faulty' or 'detached' in which case all
189 * matching devices are removed.
190 * 'f' - set the device faulty SET_DISK_FAULTY
191 * device can be 'detached' in which case any device that
192 * is inaccessible will be marked faulty.
194 mdu_array_info_t array
;
195 mdu_disk_info_t disc
;
196 unsigned long long array_size
;
197 mddev_dev_t dv
, next
= NULL
;
201 struct supertype
*st
, *tst
;
205 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
206 fprintf(stderr
, Name
": cannot get array info for %s\n",
211 /* array.size is only 32 bit and may be truncated.
212 * So read from sysfs if possible, and record number of sectors
215 array_size
= get_component_size(fd
);
217 array_size
= array
.size
* 2;
219 tst
= super_by_fd(fd
);
221 fprintf(stderr
, Name
": unsupport array - version %d.%d\n",
222 array
.major_version
, array
.minor_version
);
226 for (dv
= devlist
, j
=0 ; dv
; dv
= next
, j
= jnext
) {
227 unsigned long long ldsize
;
229 char *dnprintable
= dv
->devname
;
234 if (strcmp(dv
->devname
, "failed")==0 ||
235 strcmp(dv
->devname
, "faulty")==0) {
236 if (dv
->disposition
!= 'r') {
237 fprintf(stderr
, Name
": %s only meaningful "
238 "with -r, not -%c\n",
239 dv
->devname
, dv
->disposition
);
242 for (; j
< array
.raid_disks
+ array
.nr_disks
; j
++) {
244 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
246 if (disc
.major
== 0 && disc
.minor
== 0)
248 if ((disc
.state
& 1) == 0) /* faulty */
250 stb
.st_rdev
= makedev(disc
.major
, disc
.minor
);
253 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
254 dnprintable
= dvname
;
259 } else if (strcmp(dv
->devname
, "detached") == 0) {
260 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
261 fprintf(stderr
, Name
": %s only meaningful "
262 "with -r of -f, not -%c\n",
263 dv
->devname
, dv
->disposition
);
266 for (; j
< array
.raid_disks
+ array
.nr_disks
; j
++) {
269 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
271 if (disc
.major
== 0 && disc
.minor
== 0)
273 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
274 sfd
= dev_open(dvname
, O_RDONLY
);
279 if (dv
->disposition
== 'f' &&
280 (disc
.state
& 1) == 1) /* already faulty */
284 stb
.st_rdev
= makedev(disc
.major
, disc
.minor
);
287 dnprintable
= dvname
;
295 if (stat(dv
->devname
, &stb
)) {
296 fprintf(stderr
, Name
": cannot find %s: %s\n",
297 dv
->devname
, strerror(errno
));
300 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
301 fprintf(stderr
, Name
": %s is not a "
307 switch(dv
->disposition
){
309 fprintf(stderr
, Name
": internal error - devmode[%s]=%d\n",
310 dv
->devname
, dv
->disposition
);
315 /* Make sure it isn't in use (in 2.6 or later) */
316 tfd
= open(dv
->devname
, O_RDONLY
|O_EXCL
);
318 fprintf(stderr
, Name
": Cannot open %s: %s\n",
319 dv
->devname
, strerror(errno
));
322 remove_partitions(tfd
);
326 if (array
.not_persistent
==0)
327 st
->ss
->load_super(st
, tfd
, NULL
);
329 if (!get_dev_size(tfd
, dv
->devname
, &ldsize
)) {
335 if (array
.major_version
== 0 &&
336 md_get_version(fd
)%100 < 2) {
337 if (ioctl(fd
, HOT_ADD_DISK
,
338 (unsigned long)stb
.st_rdev
)==0) {
340 fprintf(stderr
, Name
": hot added %s\n",
345 fprintf(stderr
, Name
": hot add failed for %s: %s\n",
346 dv
->devname
, strerror(errno
));
350 if (array
.not_persistent
== 0) {
352 /* need to find a sample superblock to copy, and
353 * a spare slot to use
355 for (j
= 0; j
< tst
->max_devs
; j
++) {
359 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
361 if (disc
.major
==0 && disc
.minor
==0)
363 if ((disc
.state
& 4)==0) continue; /* sync */
364 /* Looks like a good device to try */
365 dev
= map_dev(disc
.major
, disc
.minor
, 1);
367 dfd
= dev_open(dev
, O_RDONLY
);
368 if (dfd
< 0) continue;
369 if (tst
->ss
->load_super(tst
, dfd
,
378 fprintf(stderr
, Name
": cannot find valid superblock in this array - HELP\n");
382 /* Make sure device is large enough */
383 if (tst
->ss
->avail_size(tst
, ldsize
/512) <
385 fprintf(stderr
, Name
": %s not large enough to join array\n",
390 /* Possibly this device was recently part of the array
391 * and was temporarily removed, and is now being re-added.
392 * If so, we can simply re-add it.
394 tst
->ss
->uuid_from_super(tst
, duuid
);
396 /* re-add doesn't work for version-1 superblocks
399 if (array
.major_version
== 1 &&
400 get_linux_version() <= 2006018)
403 st
->ss
->uuid_from_super(st
, ouuid
);
404 if (memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
405 /* looks close enough for now. Kernel
406 * will worry about whether a bitmap
407 * based reconstruction is possible.
410 st
->ss
->getinfo_super(st
, &mdi
);
411 disc
.major
= major(stb
.st_rdev
);
412 disc
.minor
= minor(stb
.st_rdev
);
413 disc
.number
= mdi
.disk
.number
;
414 disc
.raid_disk
= mdi
.disk
.raid_disk
;
415 disc
.state
= mdi
.disk
.state
;
417 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
418 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
420 fprintf(stderr
, Name
": re-added %s\n", dv
->devname
);
423 /* fall back on normal-add */
427 /* non-persistent. Must ensure that new drive
428 * is at least array.size big.
430 if (ldsize
/512 < array_size
) {
431 fprintf(stderr
, Name
": %s not large enough to join array\n",
436 /* in 2.6.17 and earlier, version-1 superblocks won't
437 * use the number we write, but will choose a free number.
438 * we must choose the same free number, which requires
439 * starting at 'raid_disks' and counting up
441 for (j
= array
.raid_disks
; j
< tst
->max_devs
; j
++) {
443 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
445 if (disc
.major
==0 && disc
.minor
==0)
447 if (disc
.state
& 8) /* removed */
450 disc
.major
= major(stb
.st_rdev
);
451 disc
.minor
= minor(stb
.st_rdev
);
454 if (array
.not_persistent
==0) {
456 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
457 tst
->ss
->add_to_super(tst
, &disc
);
458 if (tst
->ss
->write_init_super(tst
, &disc
,
461 } else if (dv
->re_add
) {
462 /* this had better be raid1.
463 * As we are "--re-add"ing we must find a spare slot
466 char *used
= malloc(array
.raid_disks
);
467 memset(used
, 0, array
.raid_disks
);
468 for (j
=0; j
< tst
->max_devs
; j
++) {
469 mdu_disk_info_t disc2
;
471 if (ioctl(fd
, GET_DISK_INFO
, &disc2
))
473 if (disc2
.major
==0 && disc2
.minor
==0)
475 if (disc2
.state
& 8) /* removed */
477 if (disc2
.raid_disk
< 0)
479 if (disc2
.raid_disk
> array
.raid_disks
)
481 used
[disc2
.raid_disk
] = 1;
483 for (j
=0 ; j
<array
.raid_disks
; j
++)
486 disc
.state
|= (1<<MD_DISK_SYNC
);
491 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
492 if (ioctl(fd
,ADD_NEW_DISK
, &disc
)) {
493 fprintf(stderr
, Name
": add new device failed for %s as %d: %s\n",
494 dv
->devname
, j
, strerror(errno
));
498 fprintf(stderr
, Name
": added %s\n", dv
->devname
);
503 /* FIXME check that it is a current member */
504 if (ioctl(fd
, HOT_REMOVE_DISK
, (unsigned long)stb
.st_rdev
)) {
505 fprintf(stderr
, Name
": hot remove failed "
506 "for %s: %s\n", dnprintable
,
511 fprintf(stderr
, Name
": hot removed %s\n",
515 case 'f': /* set faulty */
516 /* FIXME check current member */
517 if (ioctl(fd
, SET_DISK_FAULTY
, (unsigned long) stb
.st_rdev
)) {
518 fprintf(stderr
, Name
": set device faulty failed for %s: %s\n",
519 dnprintable
, strerror(errno
));
523 fprintf(stderr
, Name
": set %s faulty in %s\n",
524 dnprintable
, devname
);
534 /* Open any md device, and issue the RAID_AUTORUN ioctl */
536 int fd
= dev_open("9:0", O_RDONLY
);
538 if (ioctl(fd
, RAID_AUTORUN
, 0) == 0)