]>
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
;
115 /* If this is an mdmon managed array, just write 'inactive'
116 * to the array state and let mdmon clear up.
118 mdi
= sysfs_read(fd
, -1, GET_LEVEL
|GET_VERSION
);
120 mdi
->array
.level
> 0 &&
121 mdi
->text_version
[0] == '/') {
124 /* This is mdmon managed. */
126 if (sysfs_set_str(mdi
, NULL
,
127 "array_state", "inactive") < 0) {
130 ": fail to stop array %s: %s\n",
131 devname
, strerror(errno
));
135 /* Give monitor a chance to act */
136 cp
= strchr(mdi
->text_version
+1, '/');
139 ping_monitor(mdi
->text_version
+1);
141 fd
= open(devname
, O_RDONLY
);
146 if (fd
>= 0 && ioctl(fd
, STOP_ARRAY
, NULL
)) {
149 ": fail to stop array %s: %s\n",
150 devname
, strerror(errno
));
155 fprintf(stderr
, Name
": stopped %s\n", devname
);
156 if (fd
>= 0 && fstat(fd
, &stb
) == 0) {
158 if (major(stb
.st_rdev
) == MD_MAJOR
)
159 devnum
= minor(stb
.st_rdev
);
161 devnum
= -1-(minor(stb
.st_rdev
)>>6);
162 map_delete(&map
, devnum
);
170 int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
)
172 mdu_array_info_t info
;
173 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
174 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
175 devname
, strerror(errno
));
181 info
.raid_disks
= raid_disks
;
182 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
183 fprintf(stderr
, Name
": Cannot set device size/shape for %s: %s\n",
184 devname
, strerror(errno
));
190 int Manage_reconfig(char *devname
, int fd
, int layout
)
192 mdu_array_info_t info
;
193 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
194 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
195 devname
, strerror(errno
));
198 info
.layout
= layout
;
199 printf("layout set to %d\n", info
.layout
);
200 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
201 fprintf(stderr
, Name
": Cannot set layout for %s: %s\n",
202 devname
, strerror(errno
));
208 int Manage_subdevs(char *devname
, int fd
,
209 mddev_dev_t devlist
, int verbose
)
211 /* do something to each dev.
213 * 'a' - add the device
215 * If that fails EINVAL, try ADD_NEW_DISK
216 * 'r' - remove the device HOT_REMOVE_DISK
217 * device can be 'faulty' or 'detached' in which case all
218 * matching devices are removed.
219 * 'f' - set the device faulty SET_DISK_FAULTY
220 * device can be 'detached' in which case any device that
221 * is inaccessible will be marked faulty.
223 mdu_array_info_t array
;
224 mdu_disk_info_t disc
;
225 unsigned long long array_size
;
226 mddev_dev_t dv
, next
= NULL
;
230 struct supertype
*st
, *tst
;
235 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
236 fprintf(stderr
, Name
": cannot get array info for %s\n",
241 /* array.size is only 32 bit and may be truncated.
242 * So read from sysfs if possible, and record number of sectors
245 array_size
= get_component_size(fd
);
247 array_size
= array
.size
* 2;
249 tst
= super_by_fd(fd
);
251 fprintf(stderr
, Name
": unsupport array - version %d.%d\n",
252 array
.major_version
, array
.minor_version
);
256 for (dv
= devlist
, j
=0 ; dv
; dv
= next
, j
= jnext
) {
257 unsigned long long ldsize
;
259 char *dnprintable
= dv
->devname
;
265 if (strcmp(dv
->devname
, "failed")==0 ||
266 strcmp(dv
->devname
, "faulty")==0) {
267 if (dv
->disposition
!= 'r') {
268 fprintf(stderr
, Name
": %s only meaningful "
269 "with -r, not -%c\n",
270 dv
->devname
, dv
->disposition
);
273 for (; j
< array
.raid_disks
+ array
.nr_disks
; j
++) {
275 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
277 if (disc
.major
== 0 && disc
.minor
== 0)
279 if ((disc
.state
& 1) == 0) /* faulty */
281 stb
.st_rdev
= makedev(disc
.major
, disc
.minor
);
284 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
285 dnprintable
= dvname
;
290 } else if (strcmp(dv
->devname
, "detached") == 0) {
291 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
292 fprintf(stderr
, Name
": %s only meaningful "
293 "with -r of -f, not -%c\n",
294 dv
->devname
, dv
->disposition
);
297 for (; j
< array
.raid_disks
+ array
.nr_disks
; j
++) {
300 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
302 if (disc
.major
== 0 && disc
.minor
== 0)
304 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
305 sfd
= dev_open(dvname
, O_RDONLY
);
310 if (dv
->disposition
== 'f' &&
311 (disc
.state
& 1) == 1) /* already faulty */
315 stb
.st_rdev
= makedev(disc
.major
, disc
.minor
);
318 dnprintable
= dvname
;
326 if (stat(dv
->devname
, &stb
)) {
327 fprintf(stderr
, Name
": cannot find %s: %s\n",
328 dv
->devname
, strerror(errno
));
331 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
332 fprintf(stderr
, Name
": %s is not a "
338 switch(dv
->disposition
){
340 fprintf(stderr
, Name
": internal error - devmode[%s]=%d\n",
341 dv
->devname
, dv
->disposition
);
345 if (tst
->subarray
[0]) {
346 fprintf(stderr
, Name
": Cannot add disks to a"
347 " \'member\' array, perform this"
348 " operation on the parent container\n");
351 /* Make sure it isn't in use (in 2.6 or later) */
352 tfd
= open(dv
->devname
, O_RDONLY
|O_EXCL
|O_DIRECT
);
354 fprintf(stderr
, Name
": Cannot open %s: %s\n",
355 dv
->devname
, strerror(errno
));
358 remove_partitions(tfd
);
362 if (array
.not_persistent
==0)
363 st
->ss
->load_super(st
, tfd
, NULL
);
365 if (!get_dev_size(tfd
, dv
->devname
, &ldsize
)) {
372 if (!tst
->ss
->external
&&
373 array
.major_version
== 0 &&
374 md_get_version(fd
)%100 < 2) {
375 if (ioctl(fd
, HOT_ADD_DISK
,
376 (unsigned long)stb
.st_rdev
)==0) {
378 fprintf(stderr
, Name
": hot added %s\n",
383 fprintf(stderr
, Name
": hot add failed for %s: %s\n",
384 dv
->devname
, strerror(errno
));
388 if (array
.not_persistent
== 0) {
390 /* Make sure device is large enough */
391 if (tst
->ss
->avail_size(tst
, ldsize
/512) <
393 fprintf(stderr
, Name
": %s not large enough to join array\n",
398 /* need to find a sample superblock to copy, and
399 * a spare slot to use
401 for (j
= 0; j
< tst
->max_devs
; j
++) {
405 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
407 if (disc
.major
==0 && disc
.minor
==0)
409 if ((disc
.state
& 4)==0) continue; /* sync */
410 /* Looks like a good device to try */
411 dev
= map_dev(disc
.major
, disc
.minor
, 1);
413 dfd
= dev_open(dev
, O_RDONLY
);
414 if (dfd
< 0) continue;
415 if (tst
->ss
->load_super(tst
, dfd
,
424 fprintf(stderr
, Name
": cannot find valid superblock in this array - HELP\n");
427 /* Possibly this device was recently part of the array
428 * and was temporarily removed, and is now being re-added.
429 * If so, we can simply re-add it.
431 tst
->ss
->uuid_from_super(tst
, duuid
);
433 /* re-add doesn't work for version-1 superblocks
436 if (array
.major_version
== 1 &&
437 get_linux_version() <= 2006018)
440 st
->ss
->uuid_from_super(st
, ouuid
);
441 if (memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
442 /* looks close enough for now. Kernel
443 * will worry about whether a bitmap
444 * based reconstruction is possible.
447 st
->ss
->getinfo_super(st
, &mdi
);
448 disc
.major
= major(stb
.st_rdev
);
449 disc
.minor
= minor(stb
.st_rdev
);
450 disc
.number
= mdi
.disk
.number
;
451 disc
.raid_disk
= mdi
.disk
.raid_disk
;
452 disc
.state
= mdi
.disk
.state
;
454 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
455 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
457 fprintf(stderr
, Name
": re-added %s\n", dv
->devname
);
460 /* fall back on normal-add */
464 /* non-persistent. Must ensure that new drive
465 * is at least array.size big.
467 if (ldsize
/512 < array_size
) {
468 fprintf(stderr
, Name
": %s not large enough to join array\n",
473 /* in 2.6.17 and earlier, version-1 superblocks won't
474 * use the number we write, but will choose a free number.
475 * we must choose the same free number, which requires
476 * starting at 'raid_disks' and counting up
478 for (j
= array
.raid_disks
; j
< tst
->max_devs
; j
++) {
480 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
482 if (disc
.major
==0 && disc
.minor
==0)
484 if (disc
.state
& 8) /* removed */
487 disc
.major
= major(stb
.st_rdev
);
488 disc
.minor
= minor(stb
.st_rdev
);
491 if (array
.not_persistent
==0) {
494 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
495 dfd
= open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
496 tst
->ss
->add_to_super(tst
, &disc
, dfd
,
498 /* write_init_super will close 'dfd' */
499 if (tst
->ss
->write_init_super(tst
))
501 } else if (dv
->re_add
) {
502 /* this had better be raid1.
503 * As we are "--re-add"ing we must find a spare slot
506 char *used
= malloc(array
.raid_disks
);
507 memset(used
, 0, array
.raid_disks
);
508 for (j
=0; j
< tst
->max_devs
; j
++) {
509 mdu_disk_info_t disc2
;
511 if (ioctl(fd
, GET_DISK_INFO
, &disc2
))
513 if (disc2
.major
==0 && disc2
.minor
==0)
515 if (disc2
.state
& 8) /* removed */
517 if (disc2
.raid_disk
< 0)
519 if (disc2
.raid_disk
> array
.raid_disks
)
521 used
[disc2
.raid_disk
] = 1;
523 for (j
=0 ; j
<array
.raid_disks
; j
++)
526 disc
.state
|= (1<<MD_DISK_SYNC
);
531 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
532 if (ioctl(fd
,ADD_NEW_DISK
, &disc
)) {
533 fprintf(stderr
, Name
": add new device failed for %s as %d: %s\n",
534 dv
->devname
, j
, strerror(errno
));
538 fprintf(stderr
, Name
": added %s\n", dv
->devname
);
543 if (tst
->subarray
[0]) {
544 fprintf(stderr
, Name
": Cannot remove disks from a"
545 " \'member\' array, perform this"
546 " operation on the parent container\n");
549 if (tst
->ss
->external
) {
550 /* To remove a device from a container, we must
551 * check that it isn't in use in an array.
552 * This involves looking in the 'holders'
553 * directory - there must be just one entry,
555 * To ensure that it doesn't get used as a
556 * hold spare while we are checking, we
557 * get an O_EXCL open on the container
559 int dnum
= fd2devnum(fd
);
560 lfd
= open_dev_excl(dnum
);
563 ": Cannot get exclusive access "
564 " to container - odd\n");
567 if (!sysfs_unique_holder(dnum
, stb
.st_rdev
)) {
569 ": %s is %s, cannot remove.\n",
571 errno
== EEXIST
? "still in use":
577 /* FIXME check that it is a current member */
578 err
= ioctl(fd
, HOT_REMOVE_DISK
, (unsigned long)stb
.st_rdev
);
579 if (err
&& errno
== ENODEV
) {
580 /* Old kernels rejected this if no personality
582 struct mdinfo
*sra
= sysfs_read(fd
, 0, GET_DEVS
);
583 struct mdinfo
*dv
= NULL
;
586 for ( ; dv
; dv
=dv
->next
)
587 if (dv
->disk
.major
== major(stb
.st_rdev
) &&
588 dv
->disk
.minor
== minor(stb
.st_rdev
))
591 err
= sysfs_set_str(sra
, dv
,
599 fprintf(stderr
, Name
": hot remove failed "
600 "for %s: %s\n", dnprintable
,
608 fprintf(stderr
, Name
": hot removed %s\n",
612 case 'f': /* set faulty */
613 /* FIXME check current member */
614 if (ioctl(fd
, SET_DISK_FAULTY
, (unsigned long) stb
.st_rdev
)) {
615 fprintf(stderr
, Name
": set device faulty failed for %s: %s\n",
616 dnprintable
, strerror(errno
));
620 fprintf(stderr
, Name
": set %s faulty in %s\n",
621 dnprintable
, devname
);
631 /* Open any md device, and issue the RAID_AUTORUN ioctl */
633 int fd
= dev_open("9:0", O_RDONLY
);
635 if (ioctl(fd
, RAID_AUTORUN
, 0) == 0)