]>
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
81 * Only print failure messages if quiet == 0;
82 * quiet > 0 means really be quiet
83 * quiet < 0 means we will try again if it fails.
85 mdu_param_t param
; /* unused */
87 if (runstop
== -1 && md_get_version(fd
) < 9000) {
88 if (ioctl(fd
, STOP_MD
, 0)) {
89 if (quiet
== 0) fprintf(stderr
,
90 Name
": stopping device %s "
92 devname
, strerror(errno
));
97 if (md_get_version(fd
) < 9000) {
98 fprintf(stderr
, Name
": need md driver version 0.90.0 or later\n");
102 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
103 fprintf(stderr, Name ": %s does not appear to be active.\n",
109 if (ioctl(fd
, RUN_ARRAY
, ¶m
)) {
110 fprintf(stderr
, Name
": failed to run array %s: %s\n",
111 devname
, strerror(errno
));
115 fprintf(stderr
, Name
": started %s\n", devname
);
116 } else if (runstop
< 0){
117 struct map_ent
*map
= NULL
;
120 /* If this is an mdmon managed array, just write 'inactive'
121 * to the array state and let mdmon clear up.
123 mdi
= sysfs_read(fd
, -1, GET_LEVEL
|GET_VERSION
);
125 mdi
->array
.level
> 0 &&
126 mdi
->text_version
[0] == '/') {
129 /* This is mdmon managed. */
131 if (sysfs_set_str(mdi
, NULL
,
132 "array_state", "inactive") < 0) {
135 ": failed to stop array %s: %s\n",
136 devname
, strerror(errno
));
140 /* Give monitor a chance to act */
141 cp
= strchr(mdi
->text_version
+1, '/');
144 ping_monitor(mdi
->text_version
+1);
146 fd
= open(devname
, O_RDONLY
);
148 mdi
->array
.major_version
== -1 &&
149 mdi
->array
.minor_version
== -2 &&
150 mdi
->text_version
[0] != '/') {
151 /* container, possibly mdmon-managed.
152 * Make sure mdmon isn't opening it, which
153 * would interfere with the 'stop'
155 ping_monitor(mdi
->sys_name
);
160 if (fd
>= 0 && ioctl(fd
, STOP_ARRAY
, NULL
)) {
163 ": failed to stop array %s: %s\n",
164 devname
, strerror(errno
));
169 fprintf(stderr
, Name
": stopped %s\n", devname
);
170 if (fd
>= 0 && fstat(fd
, &stb
) == 0) {
172 if (major(stb
.st_rdev
) == MD_MAJOR
)
173 devnum
= minor(stb
.st_rdev
);
175 devnum
= -1-(minor(stb
.st_rdev
)>>6);
176 map_delete(&map
, devnum
);
184 int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
)
186 mdu_array_info_t info
;
187 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
188 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
189 devname
, strerror(errno
));
195 info
.raid_disks
= raid_disks
;
196 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
197 fprintf(stderr
, Name
": Cannot set device size/shape for %s: %s\n",
198 devname
, strerror(errno
));
204 int Manage_reconfig(char *devname
, int fd
, int layout
)
206 mdu_array_info_t info
;
207 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
208 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
209 devname
, strerror(errno
));
212 info
.layout
= layout
;
213 printf("layout set to %d\n", info
.layout
);
214 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
215 fprintf(stderr
, Name
": Cannot set layout for %s: %s\n",
216 devname
, strerror(errno
));
222 int Manage_subdevs(char *devname
, int fd
,
223 mddev_dev_t devlist
, int verbose
)
225 /* do something to each dev.
227 * 'a' - add the device
229 * If that fails EINVAL, try ADD_NEW_DISK
230 * 'r' - remove the device HOT_REMOVE_DISK
231 * device can be 'faulty' or 'detached' in which case all
232 * matching devices are removed.
233 * 'f' - set the device faulty SET_DISK_FAULTY
234 * device can be 'detached' in which case any device that
235 * is inaccessible will be marked faulty.
237 mdu_array_info_t array
;
238 mdu_disk_info_t disc
;
239 unsigned long long array_size
;
240 mddev_dev_t dv
, next
= NULL
;
244 struct supertype
*st
, *tst
;
249 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
250 fprintf(stderr
, Name
": cannot get array info for %s\n",
255 /* array.size is only 32 bit and may be truncated.
256 * So read from sysfs if possible, and record number of sectors
259 array_size
= get_component_size(fd
);
261 array_size
= array
.size
* 2;
263 tst
= super_by_fd(fd
);
265 fprintf(stderr
, Name
": unsupport array - version %d.%d\n",
266 array
.major_version
, array
.minor_version
);
270 for (dv
= devlist
, j
=0 ; dv
; dv
= next
, j
= jnext
) {
271 unsigned long long ldsize
;
273 char *dnprintable
= dv
->devname
;
279 if (strcmp(dv
->devname
, "failed")==0 ||
280 strcmp(dv
->devname
, "faulty")==0) {
281 if (dv
->disposition
!= 'r') {
282 fprintf(stderr
, Name
": %s only meaningful "
283 "with -r, not -%c\n",
284 dv
->devname
, dv
->disposition
);
287 for (; j
< array
.raid_disks
+ array
.nr_disks
; j
++) {
289 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
291 if (disc
.major
== 0 && disc
.minor
== 0)
293 if ((disc
.state
& 1) == 0) /* faulty */
295 stb
.st_rdev
= makedev(disc
.major
, disc
.minor
);
298 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
299 dnprintable
= dvname
;
304 } else if (strcmp(dv
->devname
, "detached") == 0) {
305 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
306 fprintf(stderr
, Name
": %s only meaningful "
307 "with -r of -f, not -%c\n",
308 dv
->devname
, dv
->disposition
);
311 for (; j
< array
.raid_disks
+ array
.nr_disks
; j
++) {
314 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
316 if (disc
.major
== 0 && disc
.minor
== 0)
318 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
319 sfd
= dev_open(dvname
, O_RDONLY
);
324 if (dv
->disposition
== 'f' &&
325 (disc
.state
& 1) == 1) /* already faulty */
329 stb
.st_rdev
= makedev(disc
.major
, disc
.minor
);
332 dnprintable
= dvname
;
340 if (stat(dv
->devname
, &stb
)) {
341 fprintf(stderr
, Name
": cannot find %s: %s\n",
342 dv
->devname
, strerror(errno
));
345 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
346 fprintf(stderr
, Name
": %s is not a "
352 switch(dv
->disposition
){
354 fprintf(stderr
, Name
": internal error - devmode[%s]=%d\n",
355 dv
->devname
, dv
->disposition
);
359 if (tst
->subarray
[0]) {
360 fprintf(stderr
, Name
": Cannot add disks to a"
361 " \'member\' array, perform this"
362 " operation on the parent container\n");
365 /* Make sure it isn't in use (in 2.6 or later) */
366 tfd
= open(dv
->devname
, O_RDONLY
|O_EXCL
|O_DIRECT
);
368 fprintf(stderr
, Name
": Cannot open %s: %s\n",
369 dv
->devname
, strerror(errno
));
372 remove_partitions(tfd
);
376 if (array
.not_persistent
==0)
377 st
->ss
->load_super(st
, tfd
, NULL
);
379 if (!get_dev_size(tfd
, dv
->devname
, &ldsize
)) {
386 if (!tst
->ss
->external
&&
387 array
.major_version
== 0 &&
388 md_get_version(fd
)%100 < 2) {
389 if (ioctl(fd
, HOT_ADD_DISK
,
390 (unsigned long)stb
.st_rdev
)==0) {
392 fprintf(stderr
, Name
": hot added %s\n",
397 fprintf(stderr
, Name
": hot add failed for %s: %s\n",
398 dv
->devname
, strerror(errno
));
402 if (array
.not_persistent
== 0) {
404 /* Make sure device is large enough */
405 if (tst
->ss
->avail_size(tst
, ldsize
/512) <
407 fprintf(stderr
, Name
": %s not large enough to join array\n",
412 /* need to find a sample superblock to copy, and
413 * a spare slot to use
415 for (j
= 0; j
< tst
->max_devs
; j
++) {
419 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
421 if (disc
.major
==0 && disc
.minor
==0)
423 if ((disc
.state
& 4)==0) continue; /* sync */
424 /* Looks like a good device to try */
425 dev
= map_dev(disc
.major
, disc
.minor
, 1);
427 dfd
= dev_open(dev
, O_RDONLY
);
428 if (dfd
< 0) continue;
429 if (tst
->ss
->load_super(tst
, dfd
,
438 fprintf(stderr
, Name
": cannot find valid superblock in this array - HELP\n");
441 /* Possibly this device was recently part of the array
442 * and was temporarily removed, and is now being re-added.
443 * If so, we can simply re-add it.
445 tst
->ss
->uuid_from_super(tst
, duuid
);
447 /* re-add doesn't work for version-1 superblocks
450 if (array
.major_version
== 1 &&
451 get_linux_version() <= 2006018)
454 st
->ss
->uuid_from_super(st
, ouuid
);
455 if (memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
456 /* looks close enough for now. Kernel
457 * will worry about whether a bitmap
458 * based reconstruction is possible.
461 st
->ss
->getinfo_super(st
, &mdi
);
462 disc
.major
= major(stb
.st_rdev
);
463 disc
.minor
= minor(stb
.st_rdev
);
464 disc
.number
= mdi
.disk
.number
;
465 disc
.raid_disk
= mdi
.disk
.raid_disk
;
466 disc
.state
= mdi
.disk
.state
;
468 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
469 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
471 fprintf(stderr
, Name
": re-added %s\n", dv
->devname
);
474 /* fall back on normal-add */
478 /* non-persistent. Must ensure that new drive
479 * is at least array.size big.
481 if (ldsize
/512 < array_size
) {
482 fprintf(stderr
, Name
": %s not large enough to join array\n",
487 /* in 2.6.17 and earlier, version-1 superblocks won't
488 * use the number we write, but will choose a free number.
489 * we must choose the same free number, which requires
490 * starting at 'raid_disks' and counting up
492 for (j
= array
.raid_disks
; j
< tst
->max_devs
; j
++) {
494 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
496 if (disc
.major
==0 && disc
.minor
==0)
498 if (disc
.state
& 8) /* removed */
501 disc
.major
= major(stb
.st_rdev
);
502 disc
.minor
= minor(stb
.st_rdev
);
505 if (array
.not_persistent
==0) {
508 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
509 dfd
= open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
510 tst
->ss
->add_to_super(tst
, &disc
, dfd
,
512 /* write_init_super will close 'dfd' */
513 if (tst
->ss
->write_init_super(tst
))
515 } else if (dv
->re_add
) {
516 /* this had better be raid1.
517 * As we are "--re-add"ing we must find a spare slot
520 char *used
= malloc(array
.raid_disks
);
521 memset(used
, 0, array
.raid_disks
);
522 for (j
=0; j
< tst
->max_devs
; j
++) {
523 mdu_disk_info_t disc2
;
525 if (ioctl(fd
, GET_DISK_INFO
, &disc2
))
527 if (disc2
.major
==0 && disc2
.minor
==0)
529 if (disc2
.state
& 8) /* removed */
531 if (disc2
.raid_disk
< 0)
533 if (disc2
.raid_disk
> array
.raid_disks
)
535 used
[disc2
.raid_disk
] = 1;
537 for (j
=0 ; j
<array
.raid_disks
; j
++)
540 disc
.state
|= (1<<MD_DISK_SYNC
);
545 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
546 if (ioctl(fd
,ADD_NEW_DISK
, &disc
)) {
547 fprintf(stderr
, Name
": add new device failed for %s as %d: %s\n",
548 dv
->devname
, j
, strerror(errno
));
552 fprintf(stderr
, Name
": added %s\n", dv
->devname
);
557 if (tst
->subarray
[0]) {
558 fprintf(stderr
, Name
": Cannot remove disks from a"
559 " \'member\' array, perform this"
560 " operation on the parent container\n");
563 if (tst
->ss
->external
) {
564 /* To remove a device from a container, we must
565 * check that it isn't in use in an array.
566 * This involves looking in the 'holders'
567 * directory - there must be just one entry,
569 * To ensure that it doesn't get used as a
570 * hold spare while we are checking, we
571 * get an O_EXCL open on the container
573 int dnum
= fd2devnum(fd
);
574 lfd
= open_dev_excl(dnum
);
577 ": Cannot get exclusive access "
578 " to container - odd\n");
581 if (!sysfs_unique_holder(dnum
, stb
.st_rdev
)) {
583 ": %s is %s, cannot remove.\n",
585 errno
== EEXIST
? "still in use":
591 /* FIXME check that it is a current member */
592 err
= ioctl(fd
, HOT_REMOVE_DISK
, (unsigned long)stb
.st_rdev
);
593 if (err
&& errno
== ENODEV
) {
594 /* Old kernels rejected this if no personality
596 struct mdinfo
*sra
= sysfs_read(fd
, 0, GET_DEVS
);
597 struct mdinfo
*dv
= NULL
;
600 for ( ; dv
; dv
=dv
->next
)
601 if (dv
->disk
.major
== major(stb
.st_rdev
) &&
602 dv
->disk
.minor
== minor(stb
.st_rdev
))
605 err
= sysfs_set_str(sra
, dv
,
613 fprintf(stderr
, Name
": hot remove failed "
614 "for %s: %s\n", dnprintable
,
622 fprintf(stderr
, Name
": hot removed %s\n",
626 case 'f': /* set faulty */
627 /* FIXME check current member */
628 if (ioctl(fd
, SET_DISK_FAULTY
, (unsigned long) stb
.st_rdev
)) {
629 fprintf(stderr
, Name
": set device faulty failed for %s: %s\n",
630 dnprintable
, strerror(errno
));
634 fprintf(stderr
, Name
": set %s faulty in %s\n",
635 dnprintable
, devname
);
645 /* Open any md device, and issue the RAID_AUTORUN ioctl */
647 int fd
= dev_open("9:0", O_RDONLY
);
649 if (ioctl(fd
, RAID_AUTORUN
, 0) == 0)