2 * Incremental.c - support --incremental. Part of:
3 * mdadm - manage Linux "md" devices aka RAID arrays.
5 * Copyright (C) 2006-2013 Neil Brown <neilb@suse.de>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * Email: <neilb@suse.de>
27 * QVB Post Office, NSW 1230
36 static int count_active(struct supertype
*st
, struct mdinfo
*sra
,
37 int mdfd
, char **availp
,
39 static void find_reject(int mdfd
, struct supertype
*st
, struct mdinfo
*sra
,
40 int number
, __u64 events
, int verbose
,
42 static int try_spare(char *devname
, int *dfdp
, struct dev_policy
*pol
,
43 struct map_ent
*target
,
44 struct supertype
*st
, int verbose
);
46 static int Incremental_container(struct supertype
*st
, char *devname
,
47 struct context
*c
, char *only
);
49 int Incremental(struct mddev_dev
*devlist
, struct context
*c
,
52 /* Add this device to an array, creating the array if necessary
53 * and starting the array if sensible or - if runstop>0 - if possible.
55 * This has several steps:
57 * 1/ Check if device is permitted by mdadm.conf, reject if not.
58 * 2/ Find metadata, reject if none appropriate (check
59 * version/name from args)
60 * 3/ Check if there is a match in mdadm.conf
61 * 3a/ if not, check for homehost match. If no match, assemble as
63 * 4/ Determine device number.
64 * - If in mdadm.conf with std name, use that
65 * - UUID in /var/run/mdadm.map use that
66 * - If name is suggestive, use that. unless in use with different uuid.
67 * - Choose a free, high number.
68 * - Use a partitioned device unless strong suggestion not to.
70 * Don't choose partitioned for containers.
71 * 5/ Find out if array already exists
73 * - choose a name, from mdadm.conf or 'name' field in array.
77 * - check one drive in array to make sure metadata is a reasonably
78 * close match. Reject if not (e.g. different type)
80 * 6/ Make sure /var/run/mdadm.map contains this array.
81 * 7/ Is there enough devices to possibly start the array?
82 * For a container, this means running Incremental_container.
83 * 7a/ if not, finish with success.
85 * - read all metadata and arrange devices like -A does
86 * - if number of OK devices match expected, or -R and there are enough,
87 * start the array (auto-readonly).
90 struct mdinfo info
, dinfo
;
91 struct mdinfo
*sra
= NULL
, *d
;
92 struct mddev_ident
*match
;
93 char chosen_name
[1024];
96 struct map_ent
*mp
, *map
= NULL
;
97 int dfd
= -1, mdfd
= -1;
102 mdu_array_info_t ainf
;
103 struct dev_policy
*policy
= NULL
;
104 struct map_ent target_array
;
106 char *devname
= devlist
->devname
;
108 struct createinfo
*ci
= conf_get_create_info();
110 if (stat(devname
, &stb
) < 0) {
112 pr_err("stat failed for %s: %s.\n",
113 devname
, strerror(errno
));
116 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
118 pr_err("%s is not a block device.\n",
122 dfd
= dev_open(devname
, O_RDONLY
);
125 pr_err("cannot open %s: %s.\n",
126 devname
, strerror(errno
));
129 /* If the device is a container, we do something very different */
130 if (must_be_container(dfd
)) {
132 st
= super_by_fd(dfd
, NULL
);
134 st
->ignore_hw_compat
= 1;
135 if (st
&& st
->ss
->load_container
)
136 rv
= st
->ss
->load_container(st
, dfd
, NULL
);
139 if (!rv
&& st
->ss
->container_content
) {
141 pr_err("failed to get "
142 "exclusive lock on mapfile\n");
144 printf("MD_DEVNAME=%s\n", devname
);
145 rv
= Incremental_container(st
, devname
, c
, NULL
);
150 pr_err("%s is not part of an md array.\n",
155 /* 1/ Check if device is permitted by mdadm.conf */
157 for (;devlist
; devlist
= devlist
->next
)
158 if (conf_test_dev(devlist
->devname
))
161 devlist
= conf_get_devs();
162 for (;devlist
; devlist
= devlist
->next
) {
164 if (stat(devlist
->devname
, &st2
) == 0 &&
165 (st2
.st_mode
& S_IFMT
) == S_IFBLK
&&
166 st2
.st_rdev
== stb
.st_rdev
)
172 pr_err("%s not permitted by mdadm.conf.\n",
177 /* 2/ Find metadata, reject if none appropriate (check
178 * version/name from args) */
180 if (fstat(dfd
, &stb
) < 0) {
182 pr_err("fstat failed for %s: %s.\n",
183 devname
, strerror(errno
));
186 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
188 pr_err("%s is not a block device.\n",
193 dinfo
.disk
.major
= major(stb
.st_rdev
);
194 dinfo
.disk
.minor
= minor(stb
.st_rdev
);
196 policy
= disk_policy(&dinfo
);
197 have_target
= policy_check_path(&dinfo
, &target_array
);
199 if (st
== NULL
&& (st
= guess_super(dfd
)) == NULL
) {
201 pr_err("no recognisable superblock on %s.\n",
203 rv
= try_spare(devname
, &dfd
, policy
,
204 have_target
? &target_array
: NULL
,
208 st
->ignore_hw_compat
= 1;
209 if (st
->ss
->compare_super
== NULL
||
210 st
->ss
->load_super(st
, dfd
, NULL
)) {
212 pr_err("no RAID superblock on %s.\n",
214 rv
= try_spare(devname
, &dfd
, policy
,
215 have_target
? &target_array
: NULL
,
220 close (dfd
); dfd
= -1;
222 st
->ss
->getinfo_super(st
, &info
, NULL
);
224 /* 3/ Check if there is a match in mdadm.conf */
225 match
= conf_match(st
, &info
, devname
, c
->verbose
, &rv
);
226 if (!match
&& rv
== 2)
229 if (match
&& match
->devname
230 && strcasecmp(match
->devname
, "<ignore>") == 0) {
232 pr_err("array containing %s is explicitly"
233 " ignored by mdadm.conf\n",
238 /* 3a/ if not, check for homehost match. If no match, continue
239 * but don't trust the 'name' in the array. Thus a 'random' minor
240 * number will be assigned, and the device name will be based
244 else if (st
->ss
->match_home(st
, c
->homehost
) == 1)
246 else if (st
->ss
->match_home(st
, "any") == 1)
247 trustworthy
= LOCAL_ANY
;
249 trustworthy
= FOREIGN
;
251 if (!match
&& !conf_test_metadata(st
->ss
->name
, policy
,
252 (trustworthy
== LOCAL
))) {
254 pr_err("%s has metadata type %s for which "
255 "auto-assembly is disabled\n",
256 devname
, st
->ss
->name
);
259 if (trustworthy
== LOCAL_ANY
)
262 /* There are three possible sources for 'autof': command line,
263 * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf.
264 * ARRAY takes precedence, then command line, then
267 if (match
&& match
->autof
)
268 c
->autof
= match
->autof
;
270 c
->autof
= ci
->autof
;
272 name_to_use
= info
.name
;
273 if (name_to_use
[0] == 0 &&
274 info
.array
.level
== LEVEL_CONTAINER
) {
275 name_to_use
= info
.text_version
;
276 trustworthy
= METADATA
;
278 if (name_to_use
[0] && trustworthy
!= LOCAL
&&
279 ! c
->require_homehost
&&
280 conf_name_is_free(name_to_use
))
283 /* strip "hostname:" prefix from name if we have decided
284 * to treat it as LOCAL
286 if (trustworthy
== LOCAL
&& strchr(name_to_use
, ':') != NULL
)
287 name_to_use
= strchr(name_to_use
, ':')+1;
289 /* 4/ Check if array exists.
292 pr_err("failed to get exclusive lock on "
294 /* Now check we can get O_EXCL. If not, probably "mdadm -A" has
297 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
300 pr_err("cannot reopen %s: %s.\n",
301 devname
, strerror(errno
));
304 /* Cannot hold it open while we add the device to the array,
305 * so we must release the O_EXCL and depend on the map_lock()
306 * So now is the best time to remove any partitions.
308 remove_partitions(dfd
);
312 mp
= map_by_uuid(&map
, info
.uuid
);
314 mdfd
= open_dev(mp
->devnm
);
320 /* Couldn't find an existing array, maybe make a new one */
321 mdfd
= create_mddev(match
? match
->devname
: NULL
,
322 name_to_use
, c
->autof
, trustworthy
, chosen_name
);
327 sysfs_init(&info
, mdfd
, NULL
);
329 if (set_array_info(mdfd
, st
, &info
) != 0) {
330 pr_err("failed to set array info for %s: %s\n",
331 chosen_name
, strerror(errno
));
337 dinfo
.disk
.major
= major(stb
.st_rdev
);
338 dinfo
.disk
.minor
= minor(stb
.st_rdev
);
339 if (add_disk(mdfd
, st
, &info
, &dinfo
) != 0) {
340 pr_err("failed to add %s to new array %s: %s.\n",
341 devname
, chosen_name
, strerror(errno
));
342 ioctl(mdfd
, STOP_ARRAY
, 0);
346 sra
= sysfs_read(mdfd
, NULL
, (GET_DEVS
| GET_STATE
|
347 GET_OFFSET
| GET_SIZE
));
349 if (!sra
|| !sra
->devs
|| sra
->devs
->disk
.raid_disk
>= 0) {
350 /* It really should be 'none' - must be old buggy
351 * kernel, and mdadm -I may not be able to complete.
354 ioctl(mdfd
, STOP_ARRAY
, NULL
);
355 pr_err("You have an old buggy kernel which cannot support\n"
356 " --incremental reliably. Aborting.\n");
360 info
.array
.working_disks
= 1;
361 /* 6/ Make sure /var/run/mdadm.map contains this array. */
362 map_update(&map
, fd2devnm(mdfd
),
364 info
.uuid
, chosen_name
);
367 /* - check one drive in array to make sure metadata is a reasonably */
368 /* close match. Reject if not (e.g. different type) */
369 /* - add the device */
373 struct supertype
*st2
;
374 struct mdinfo info2
, *d
;
376 sra
= sysfs_read(mdfd
, NULL
, (GET_DEVS
| GET_STATE
|
377 GET_OFFSET
| GET_SIZE
));
380 strcpy(chosen_name
, mp
->path
);
382 strcpy(chosen_name
, mp
->devnm
);
384 /* It is generally not OK to add non-spare drives to a
385 * running array as they are probably missing because
386 * they failed. However if runstop is 1, then the
387 * array was possibly started early and our best bet is
388 * to add this anyway.
389 * Also if action policy is re-add or better we allow
391 * This doesn't apply to containers as the 'non-spare'
392 * flag has a different meaning. The test has to happen
393 * at the device level there
395 if (!st
->ss
->external
396 && (info
.disk
.state
& (1<<MD_DISK_SYNC
)) != 0
397 && ! policy_action_allows(policy
, st
->ss
->name
,
400 if (ioctl(mdfd
, GET_ARRAY_INFO
, &ainf
) == 0) {
401 pr_err("not adding %s to active array (without --run) %s\n",
402 devname
, chosen_name
);
412 sprintf(dn
, "%d:%d", sra
->devs
->disk
.major
,
413 sra
->devs
->disk
.minor
);
414 dfd2
= dev_open(dn
, O_RDONLY
);
416 pr_err("unable to open %s\n", devname
);
421 if (st2
->ss
->load_super(st2
, dfd2
, NULL
) ||
422 st
->ss
->compare_super(st
, st2
) != 0) {
423 pr_err("metadata mismatch between %s and "
425 devname
, chosen_name
);
431 st2
->ss
->getinfo_super(st2
, &info2
, NULL
);
432 st2
->ss
->free_super(st2
);
433 if (info
.array
.level
!= info2
.array
.level
||
434 memcmp(info
.uuid
, info2
.uuid
, 16) != 0 ||
435 info
.array
.raid_disks
!= info2
.array
.raid_disks
) {
436 pr_err("unexpected difference between %s and %s.\n",
437 chosen_name
, devname
);
442 info
.disk
.major
= major(stb
.st_rdev
);
443 info
.disk
.minor
= minor(stb
.st_rdev
);
444 /* add disk needs to know about containers */
445 if (st
->ss
->external
)
446 sra
->array
.level
= LEVEL_CONTAINER
;
447 err
= add_disk(mdfd
, st
, sra
, &info
);
448 if (err
< 0 && errno
== EBUSY
) {
449 /* could be another device present with the same
450 * disk.number. Find and reject any such
452 find_reject(mdfd
, st
, sra
, info
.disk
.number
,
453 info
.events
, c
->verbose
, chosen_name
);
454 err
= add_disk(mdfd
, st
, sra
, &info
);
456 if (err
< 0 && errno
== EINVAL
&&
457 info
.disk
.state
& (1<<MD_DISK_SYNC
)) {
458 /* Maybe it needs to be added as a spare */
459 if (policy_action_allows(policy
, st
->ss
->name
,
461 info
.disk
.state
&= ~(1<<MD_DISK_SYNC
);
462 err
= add_disk(mdfd
, st
, sra
, &info
);
465 pr_err("can only add %s to %s as a spare, and force-spare is not set.\n",
466 devname
, chosen_name
);
469 pr_err("failed to add %s to existing array %s: %s.\n",
470 devname
, chosen_name
, strerror(errno
));
474 info
.array
.working_disks
= 0;
475 for (d
= sra
->devs
; d
; d
=d
->next
)
476 info
.array
.working_disks
++;
479 if (strncmp(chosen_name
, "/dev/md/", 8) == 0)
480 md_devname
= chosen_name
+8;
482 md_devname
= chosen_name
;
484 printf("MD_DEVICE=%s\n", fd2devnm(mdfd
));
485 printf("MD_DEVNAME=%s\n", md_devname
);
486 printf("MD_FOREIGN=%s\n", trustworthy
== FOREIGN
? "yes" : "no");
489 /* 7/ Is there enough devices to possibly start the array? */
490 /* 7a/ if not, finish with success. */
491 if (info
.array
.level
== LEVEL_CONTAINER
) {
493 /* Try to assemble within the container */
494 sysfs_uevent(sra
, "change");
495 if (!c
->export
&& c
->verbose
>= 0)
496 pr_err("container %s now has %d device%s\n",
497 chosen_name
, info
.array
.working_disks
,
498 info
.array
.working_disks
== 1?"":"s");
499 wait_for(chosen_name
, mdfd
);
500 if (st
->ss
->external
)
501 strcpy(devnm
, fd2devnm(mdfd
));
502 if (st
->ss
->load_container
)
503 rv
= st
->ss
->load_container(st
, mdfd
, NULL
);
507 rv
= Incremental_container(st
, chosen_name
, c
, NULL
);
509 /* after spare is added, ping monitor for external metadata
510 * so that it can eg. try to rebuild degraded array */
511 if (st
->ss
->external
)
516 /* We have added something to the array, so need to re-read the
517 * state. Eventually this state should be kept up-to-date as
521 sra
= sysfs_read(mdfd
, NULL
, (GET_DEVS
| GET_STATE
|
522 GET_OFFSET
| GET_SIZE
));
523 active_disks
= count_active(st
, sra
, mdfd
, &avail
, &info
);
524 if (enough(info
.array
.level
, info
.array
.raid_disks
,
525 info
.array
.layout
, info
.array
.state
& 1,
528 printf("MD_STARTED=no\n");
529 } else if (c
->verbose
>= 0)
530 pr_err("%s attached to %s, not enough to start (%d).\n",
531 devname
, chosen_name
, active_disks
);
537 /* - if number of OK devices match expected, or -R and there */
539 /* + add any bitmap file */
540 /* + start the array (auto-readonly). */
542 if (ioctl(mdfd
, GET_ARRAY_INFO
, &ainf
) == 0) {
544 printf("MD_STARTED=already\n");
545 } else if (c
->verbose
>= 0)
546 pr_err("%s attached to %s which is already active.\n",
547 devname
, chosen_name
);
553 if (c
->runstop
> 0 || active_disks
>= info
.array
.working_disks
) {
555 /* Let's try to start it */
557 if (info
.reshape_active
&& !(info
.reshape_active
& RESHAPE_NO_BACKUP
)) {
558 pr_err("%s: This array is being reshaped and cannot be started\n",
560 cont_err("by --incremental. Please use --assemble\n");
563 if (match
&& match
->bitmap_file
) {
564 int bmfd
= open(match
->bitmap_file
, O_RDWR
);
566 pr_err("Could not open bitmap file %s.\n",
570 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
572 pr_err("Failed to set bitmapfile for %s.\n",
578 /* Need to remove from the array any devices which
579 * 'count_active' discerned were too old or inappropriate
581 for (d
= sra
? sra
->devs
: NULL
; d
; d
= d
->next
)
582 if (d
->disk
.state
& (1<<MD_DISK_REMOVED
))
583 remove_disk(mdfd
, st
, sra
, d
);
585 if ((sra
== NULL
|| active_disks
>= info
.array
.working_disks
)
586 && trustworthy
!= FOREIGN
)
587 rv
= ioctl(mdfd
, RUN_ARRAY
, NULL
);
589 rv
= sysfs_set_str(sra
, NULL
,
590 "array_state", "read-auto");
591 /* Array might be O_EXCL which will interfere with
592 * fsck and mount. So re-open without O_EXCL.
597 printf("MD_STARTED=yes\n");
598 } else if (c
->verbose
>= 0)
599 pr_err("%s attached to %s, which has been started.\n",
600 devname
, chosen_name
);
602 wait_for(chosen_name
, mdfd
);
603 /* We just started the array, so some devices
604 * might have been evicted from the array
605 * because their event counts were too old.
606 * If the action=re-add policy is in-force for
607 * those devices we should re-add them now.
609 for (dsk
= sra
->devs
; dsk
; dsk
= dsk
->next
) {
610 if (disk_action_allows(dsk
, st
->ss
->name
, act_re_add
) &&
611 add_disk(mdfd
, st
, sra
, dsk
) == 0)
612 pr_err("%s re-added to %s\n",
613 dsk
->sys_name
, chosen_name
);
616 pr_err("%s attached to %s, but failed to start: %s.\n",
617 devname
, chosen_name
, strerror(errno
));
622 printf("MD_STARTED=unsafe\n");
623 } else if (c
->verbose
>= 0)
624 pr_err("%s attached to %s, not enough to start safely.\n",
625 devname
, chosen_name
);
635 dev_policy_free(policy
);
644 static void find_reject(int mdfd
, struct supertype
*st
, struct mdinfo
*sra
,
645 int number
, __u64 events
, int verbose
,
648 /* Find a device attached to this array with a disk.number of number
649 * and events less than the passed events, and remove the device.
654 if (ioctl(mdfd
, GET_ARRAY_INFO
, &ra
) == 0)
655 return; /* not safe to remove from active arrays
656 * without thinking more */
658 for (d
= sra
->devs
; d
; d
= d
->next
) {
662 sprintf(dn
, "%d:%d", d
->disk
.major
, d
->disk
.minor
);
663 dfd
= dev_open(dn
, O_RDONLY
);
666 if (st
->ss
->load_super(st
, dfd
, NULL
)) {
670 st
->ss
->getinfo_super(st
, &info
, NULL
);
671 st
->ss
->free_super(st
);
674 if (info
.disk
.number
!= number
||
675 info
.events
>= events
)
678 if (d
->disk
.raid_disk
> -1)
679 sysfs_set_str(sra
, d
, "slot", "none");
680 if (sysfs_set_str(sra
, d
, "state", "remove") == 0)
682 pr_err("removing old device %s from %s\n",
683 d
->sys_name
+4, array_name
);
687 static int count_active(struct supertype
*st
, struct mdinfo
*sra
,
688 int mdfd
, char **availp
,
689 struct mdinfo
*bestinfo
)
691 /* count how many devices in sra think they are active */
695 __u64 max_events
= 0;
707 for (d
= sra
->devs
; d
; d
= d
->next
)
709 for (d
= sra
->devs
, devnum
= 0 ; d
; d
= d
->next
, devnum
++) {
715 sprintf(dn
, "%d:%d", d
->disk
.major
, d
->disk
.minor
);
716 dfd
= dev_open(dn
, O_RDONLY
);
719 ok
= st
->ss
->load_super(st
, dfd
, NULL
);
723 info
.array
.raid_disks
= raid_disks
;
724 st
->ss
->getinfo_super(st
, &info
, devmap
+ raid_disks
* devnum
);
726 raid_disks
= info
.array
.raid_disks
;
727 avail
= xcalloc(raid_disks
, 1);
730 best
= xcalloc(raid_disks
, sizeof(int));
731 devmap
= xcalloc(raid_disks
, numdevs
);
733 st
->ss
->getinfo_super(st
, &info
, devmap
);
736 if (info
.disk
.state
& (1<<MD_DISK_SYNC
))
740 max_events
= info
.events
;
741 avail
[info
.disk
.raid_disk
] = 2;
742 best
[info
.disk
.raid_disk
] = devnum
;
743 st
->ss
->getinfo_super(st
, bestinfo
, NULL
);
744 } else if (info
.events
== max_events
) {
745 avail
[info
.disk
.raid_disk
] = 2;
746 best
[info
.disk
.raid_disk
] = devnum
;
747 } else if (info
.events
== max_events
-1) {
748 if (avail
[info
.disk
.raid_disk
] == 0) {
749 avail
[info
.disk
.raid_disk
] = 1;
750 best
[info
.disk
.raid_disk
] = devnum
;
752 } else if (info
.events
< max_events
- 1)
754 else if (info
.events
== max_events
+1) {
756 max_events
= info
.events
;
757 for (i
= 0; i
< raid_disks
; i
++)
760 avail
[info
.disk
.raid_disk
] = 2;
761 best
[info
.disk
.raid_disk
] = devnum
;
762 st
->ss
->getinfo_super(st
, bestinfo
, NULL
);
763 } else { /* info.events much bigger */
764 memset(avail
, 0, raid_disks
);
765 max_events
= info
.events
;
766 avail
[info
.disk
.raid_disk
] = 2;
767 best
[info
.disk
.raid_disk
] = devnum
;
768 st
->ss
->getinfo_super(st
, bestinfo
, NULL
);
770 } else if (info
.disk
.state
& (1<<MD_DISK_REPLACEMENT
))
772 st
->ss
->free_super(st
);
776 /* We need to reject any device that thinks the best device is
777 * failed or missing */
778 for (b
= 0; b
< raid_disks
; b
++)
782 for (i
= 0 ; i
< raid_disks
; i
++) {
783 if (i
!= b
&& avail
[i
])
784 if (devmap
[raid_disks
* best
[i
] + b
] == 0) {
785 /* This device thinks 'b' is failed -
788 for (d
=sra
->devs
; devnum
; d
= d
->next
)
790 d
->disk
.state
|= (1 << MD_DISK_REMOVED
);
796 /* Also need to reject any spare device with an event count that
799 for (d
= sra
->devs
; d
; d
= d
->next
) {
800 if (!(d
->disk
.state
& (1<<MD_DISK_SYNC
)) &&
801 d
->events
> max_events
)
802 d
->disk
.state
|= (1 << MD_DISK_REMOVED
);
806 return cnt
+ replcnt
;
809 /* test if container has degraded member(s) */
810 static int container_members_max_degradation(struct map_ent
*map
, struct map_ent
*me
)
812 mdu_array_info_t array
;
814 int max_degraded
= 0;
816 for(; map
; map
= map
->next
) {
817 if (!metadata_container_matches(map
->metadata
, me
->devnm
))
819 afd
= open_dev(map
->devnm
);
822 /* most accurate information regarding array degradation */
823 if (ioctl(afd
, GET_ARRAY_INFO
, &array
) >= 0) {
824 int degraded
= array
.raid_disks
- array
.active_disks
-
826 if (degraded
> max_degraded
)
827 max_degraded
= degraded
;
831 return (max_degraded
);
834 static int array_try_spare(char *devname
, int *dfdp
, struct dev_policy
*pol
,
835 struct map_ent
*target
, int bare
,
836 struct supertype
*st
, int verbose
)
838 /* This device doesn't have any md metadata
839 * The device policy allows 'spare' and if !bare, it allows spare-same-slot.
840 * If 'st' is not set, then we only know that some metadata allows this,
841 * others possibly don't.
842 * So look for a container or array to attach the device to.
843 * Prefer 'target' if that is set and the array is found.
845 * If st is set, then only arrays of that type are considered
846 * Return 0 on success, or some exit code on failure, probably 1.
850 struct map_ent
*mp
, *map
= NULL
;
851 struct mdinfo
*chosen
= NULL
;
854 if (fstat(dfd
, &stb
) != 0)
858 * Now we need to find a suitable array to add this to.
859 * We only accept arrays that:
861 * - are in the same domains as the device
862 * - are of an size for which the device will be useful
863 * and we choose the one that is the most degraded
866 if (map_lock(&map
)) {
867 pr_err("failed to get exclusive lock on "
871 for (mp
= map
; mp
; mp
= mp
->next
) {
872 struct supertype
*st2
;
873 struct domainlist
*dl
= NULL
;
875 unsigned long long devsize
;
876 unsigned long long component_size
= 0;
878 if (is_subarray(mp
->metadata
))
881 st2
= st
->ss
->match_metadata_desc(mp
->metadata
);
883 (st
->minor_version
>= 0 &&
884 st
->minor_version
!= st2
->minor_version
)) {
886 pr_err("not adding %s to %s as metadata type doesn't match\n",
893 sra
= sysfs_read(-1, mp
->devnm
,
894 GET_DEVS
|GET_OFFSET
|GET_SIZE
|GET_STATE
|
895 GET_DEGRADED
|GET_COMPONENT
|GET_VERSION
);
897 /* Probably a container - no degraded info */
898 sra
= sysfs_read(-1, mp
->devnm
,
899 GET_DEVS
|GET_OFFSET
|GET_SIZE
|GET_STATE
|
900 GET_COMPONENT
|GET_VERSION
);
902 sra
->array
.failed_disks
= -1;
909 for(i
= 0; !st2
&& superlist
[i
]; i
++)
910 st2
= superlist
[i
]->match_metadata_desc(
914 pr_err("not adding %s to %s"
915 " as metadata not recognised.\n",
919 /* Need to double check the 'act_spare' permissions applies
922 if (!policy_action_allows(pol
, st2
->ss
->name
, act_spare
))
924 if (!bare
&& !policy_action_allows(pol
, st2
->ss
->name
,
925 act_spare_same_slot
))
929 /* update number of failed disks for mostly degraded
930 * container member */
931 if (sra
->array
.failed_disks
== -1)
932 sra
->array
.failed_disks
= container_members_max_degradation(map
, mp
);
934 get_dev_size(dfd
, NULL
, &devsize
);
935 if (sra
->component_size
== 0) {
936 /* true for containers, here we must read superblock
937 * to obtain minimum spare size */
938 struct supertype
*st3
= dup_super(st2
);
939 int mdfd
= open_dev(mp
->devnm
);
944 if (st3
->ss
->load_container
&&
945 !st3
->ss
->load_container(st3
, mdfd
, mp
->path
)) {
946 component_size
= st3
->ss
->min_acceptable_spare_size(st3
);
947 st3
->ss
->free_super(st3
);
952 if ((sra
->component_size
> 0 &&
953 st2
->ss
->avail_size(st2
, devsize
,
955 ? sra
->devs
->data_offset
957 < sra
->component_size
)
959 (sra
->component_size
== 0 && devsize
< component_size
)) {
961 pr_err("not adding %s to %s as it is too small\n",
965 /* test against target.
966 * If 'target' is set and 'bare' is false, we only accept
967 * arrays/containers that match 'target'.
968 * If 'target' is set and 'bare' is true, we prefer the
969 * array which matches 'target'.
970 * target is considered only if we deal with degraded array
972 if (target
&& policy_action_allows(pol
, st2
->ss
->name
,
973 act_spare_same_slot
)) {
974 if (strcmp(target
->metadata
, mp
->metadata
) == 0 &&
975 memcmp(target
->uuid
, mp
->uuid
,
976 sizeof(target
->uuid
)) == 0 &&
977 sra
->array
.failed_disks
> 0) {
978 /* This is our target!! */
983 /* skip to end so we don't check any more */
993 dl
= domain_from_array(sra
, st2
->ss
->name
);
994 if (domain_test(dl
, pol
, st2
->ss
->name
) != 1) {
995 /* domain test fails */
997 pr_err("not adding %s to %s as"
998 " it is not in a compatible domain\n",
1003 /* all tests passed, OK to add to this array */
1007 } else if (chosen
->array
.failed_disks
< sra
->array
.failed_disks
) {
1021 /* add current device to chosen array as a spare */
1022 int mdfd
= open_dev(chosen
->sys_name
);
1024 struct mddev_dev devlist
;
1026 devlist
.next
= NULL
;
1028 devlist
.writemostly
= 0;
1029 devlist
.devname
= devname
;
1030 sprintf(devname
, "%d:%d", major(stb
.st_rdev
),
1031 minor(stb
.st_rdev
));
1032 devlist
.disposition
= 'a';
1035 rv
= Manage_subdevs(chosen
->sys_name
, mdfd
, &devlist
,
1041 pr_err("added %s as spare for %s\n",
1042 devname
, chosen
->sys_name
);
1044 pr_err("failed to add %s as spare for %s\n",
1045 devname
, chosen
->sys_name
);
1053 static int partition_try_spare(char *devname
, int *dfdp
, struct dev_policy
*pol
,
1054 struct supertype
*st
, int verbose
)
1056 /* we know that at least one partition virtual-metadata is
1057 * allowed to incorporate spares like this device. We need to
1058 * find a suitable device to copy partition information from.
1060 * Getting a list of all disk (not partition) devices is
1061 * slightly non-trivial. We could look at /sys/block, but
1062 * that is theoretically due to be removed. Maybe best to use
1063 * /dev/disk/by-path/?* and ignore names ending '-partNN' as
1064 * we depend on this directory of 'path' info. But that fails
1065 * to find loop devices and probably others. Maybe don't
1066 * worry about that, they aren't the real target.
1068 * So: check things in /dev/disk/by-path to see if they are in
1069 * a compatible domain, then load the partition table and see
1070 * if it is OK for the new device, and choose the largest
1071 * partition table that fits.
1075 char *chosen
= NULL
;
1076 unsigned long long chosen_size
= 0;
1077 struct supertype
*chosen_st
= NULL
;
1080 dir
= opendir("/dev/disk/by-path");
1083 while ((de
= readdir(dir
)) != NULL
) {
1085 struct dev_policy
*pol2
= NULL
;
1086 struct domainlist
*domlist
= NULL
;
1089 struct supertype
*st2
= NULL
;
1090 char *devname
= NULL
;
1091 unsigned long long devsectors
;
1093 if (de
->d_ino
== 0 ||
1094 de
->d_name
[0] == '.' ||
1095 (de
->d_type
!= DT_LNK
&& de
->d_type
!= DT_UNKNOWN
))
1098 ep
= de
->d_name
+ strlen(de
->d_name
);
1099 while (ep
> de
->d_name
&&
1102 if (ep
> de
->d_name
+ 5 &&
1103 strncmp(ep
-5, "-part", 5) == 0)
1104 /* This is a partition - skip it */
1107 pol2
= path_policy(de
->d_name
, type_disk
);
1109 domain_merge(&domlist
, pol2
, st
? st
->ss
->name
: NULL
);
1110 if (domain_test(domlist
, pol
, st
? st
->ss
->name
: NULL
) != 1)
1111 /* new device is incompatible with this device. */
1114 domain_free(domlist
);
1117 if (asprintf(&devname
, "/dev/disk/by-path/%s", de
->d_name
) != 1) {
1121 fd
= open(devname
, O_RDONLY
);
1124 if (get_dev_size(fd
, devname
, &devsectors
) == 0)
1129 st2
= dup_super(st
);
1131 st2
= guess_super_type(fd
, guess_partitions
);
1133 st2
->ss
->load_super(st2
, fd
, NULL
) < 0)
1137 /* Check domain policy again, this time referring to metadata */
1138 domain_merge(&domlist
, pol2
, st2
->ss
->name
);
1139 if (domain_test(domlist
, pol
, st2
->ss
->name
) != 1)
1140 /* Incompatible devices for this metadata type */
1142 if (!policy_action_allows(pol
, st2
->ss
->name
, act_spare
))
1143 /* Some partition types allow sparing, but not
1149 st2
->ss
->getinfo_super(st2
, &info
, NULL
);
1150 if (info
.component_size
> devsectors
)
1151 /* This partitioning doesn't fit in the device */
1154 /* This is an acceptable device to copy partition
1155 * metadata from. We could just stop here, but I
1156 * think I want to keep looking incase a larger
1157 * metadata which makes better use of the device can
1160 if (chosen
== NULL
||
1161 chosen_size
< info
.component_size
) {
1162 chosen_size
= info
.component_size
;
1167 chosen_st
->ss
->free_super(chosen_st
);
1176 domain_free(domlist
);
1177 dev_policy_free(pol2
);
1179 st2
->ss
->free_super(st2
);
1191 /* 'chosen' is the best device we can find. Let's write its
1192 * metadata to devname dfd is read-only so don't use that
1194 fd
= open(devname
, O_RDWR
);
1196 chosen_st
->ss
->store_super(chosen_st
, fd
);
1200 chosen_st
->ss
->free_super(chosen_st
);
1205 static int is_bare(int dfd
)
1207 unsigned long long size
= 0;
1208 char bufpad
[4096 + 4096];
1209 char *buf
= (char*)(((long)bufpad
+ 4096) & ~4095);
1211 if (lseek(dfd
, 0, SEEK_SET
) != 0 ||
1212 read(dfd
, buf
, 4096) != 4096)
1215 if (buf
[0] != '\0' && buf
[0] != '\x5a' && buf
[0] != '\xff')
1217 if (memcmp(buf
, buf
+1, 4095) != 0)
1220 /* OK, first 4K appear blank, try the end. */
1221 get_dev_size(dfd
, NULL
, &size
);
1222 if (lseek(dfd
, size
-4096, SEEK_SET
) < 0 ||
1223 read(dfd
, buf
, 4096) != 4096)
1226 if (buf
[0] != '\0' && buf
[0] != '\x5a' && buf
[0] != '\xff')
1228 if (memcmp(buf
, buf
+1, 4095) != 0)
1234 /* adding a spare to a regular array is quite different from adding one to
1235 * a set-of-partitions virtual array.
1236 * This function determines which is worth trying and tries as appropriate.
1237 * Arrays are given priority over partitions.
1239 static int try_spare(char *devname
, int *dfdp
, struct dev_policy
*pol
,
1240 struct map_ent
*target
,
1241 struct supertype
*st
, int verbose
)
1246 int partitions_ok
= 0;
1250 /* Can only add a spare if device has at least one domain */
1251 if (pol_find(pol
, pol_domain
) == NULL
)
1253 /* And only if some action allows spares */
1254 if (!policy_action_allows(pol
, st
?st
->ss
->name
:NULL
, act_spare
))
1257 /* Now check if the device is bare.
1258 * bare devices can always be added as a spare
1259 * non-bare devices can only be added if spare-same-slot is permitted,
1260 * and this device is replacing a previous device - in which case 'target'
1263 if (!is_bare(dfd
)) {
1264 /* Must have a target and allow same_slot */
1265 /* Later - may allow force_spare without target */
1267 !policy_action_allows(pol
, st
?st
->ss
->name
:NULL
,
1268 act_spare_same_slot
)) {
1270 pr_err("%s is not bare, so not "
1271 "considering as a spare\n",
1279 /* It might be OK to add this device to an array - need to see
1280 * what arrays might be candidates.
1283 /* just try try 'array' or 'partition' based on this metadata */
1284 if (st
->ss
->add_to_super
)
1285 return array_try_spare(devname
, dfdp
, pol
, target
, bare
,
1288 return partition_try_spare(devname
, dfdp
, pol
,
1291 /* No metadata was specified or found so options are open.
1292 * Check for whether any array metadata, or any partition metadata
1293 * might allow adding the spare. This check is just help to avoid
1294 * a more costly scan of all arrays when we can be sure that will
1297 for (i
= 0; (!arrays_ok
|| !partitions_ok
) && superlist
[i
] ; i
++) {
1298 if (superlist
[i
]->add_to_super
&& !arrays_ok
&&
1299 policy_action_allows(pol
, superlist
[i
]->name
, act_spare
))
1301 if (superlist
[i
]->add_to_super
== NULL
&& !partitions_ok
&&
1302 policy_action_allows(pol
, superlist
[i
]->name
, act_spare
))
1307 rv
= array_try_spare(devname
, dfdp
, pol
, target
, bare
,
1309 if (rv
!= 0 && partitions_ok
)
1310 rv
= partition_try_spare(devname
, dfdp
, pol
, st
, verbose
);
1314 int IncrementalScan(struct context
*c
, char *devnm
)
1316 /* look at every device listed in the 'map' file.
1317 * If one is found that is not running then:
1318 * look in mdadm.conf for bitmap file.
1319 * if one exists, but array has none, add it.
1320 * try to start array in auto-readonly mode
1322 struct map_ent
*mapl
= NULL
;
1324 struct mddev_ident
*devs
, *mddev
;
1330 devs
= conf_get_ident(NULL
);
1333 for (me
= mapl
; me
; me
= me
->next
) {
1334 mdu_array_info_t array
;
1335 mdu_bitmap_file_t bmf
;
1339 if (devnm
&& strcmp(devnm
, me
->devnm
) != 0)
1341 if (devnm
&& me
->metadata
[0] == '/') {
1343 /* member array, need to work on container */
1344 strncpy(container
, me
->metadata
+1, 32);
1346 sl
= strchr(container
, '/');
1353 mdfd
= open_dev(me
->devnm
);
1357 if (!isdigit(me
->metadata
[0])) {
1358 /* must be a container */
1359 struct supertype
*st
= super_by_fd(mdfd
, NULL
);
1361 struct map_ent
*map
= NULL
;
1363 st
->ignore_hw_compat
= 1;
1364 if (st
&& st
->ss
->load_container
)
1365 ret
= st
->ss
->load_container(st
, mdfd
, NULL
);
1367 if (!ret
&& st
->ss
->container_content
) {
1369 pr_err("failed to get exclusive lock on mapfile\n");
1370 ret
= Incremental_container(st
, me
->path
, c
, only
);
1377 if (ioctl(mdfd
, GET_ARRAY_INFO
, &array
) == 0 ||
1382 /* Ok, we can try this one. Maybe it needs a bitmap */
1383 for (mddev
= devs
; mddev
; mddev
= mddev
->next
)
1384 if (mddev
->devname
&& me
->path
1385 && devname_matches(mddev
->devname
, me
->path
))
1387 if (mddev
&& mddev
->bitmap_file
) {
1389 * Note: early kernels will wrongly fail this, so it
1393 if (ioctl(mdfd
, GET_ARRAY_INFO
, &bmf
) < 0) {
1394 int bmfd
= open(mddev
->bitmap_file
, O_RDWR
);
1396 added
= ioctl(mdfd
, SET_BITMAP_FILE
,
1401 if (c
->verbose
>= 0) {
1403 pr_err("Added bitmap %s to %s\n",
1404 mddev
->bitmap_file
, me
->path
);
1405 else if (errno
!= EEXIST
)
1406 pr_err("Failed to add bitmap to %s: %s\n",
1407 me
->path
, strerror(errno
));
1410 /* FIXME check for reshape_active and consider not
1413 sra
= sysfs_read(mdfd
, NULL
, 0);
1415 if (sysfs_set_str(sra
, NULL
,
1416 "array_state", "read-auto") == 0) {
1417 if (c
->verbose
>= 0)
1418 pr_err("started array %s\n",
1419 me
->path
?: me
->devnm
);
1421 pr_err("failed to start array %s: %s\n",
1422 me
->path
?: me
->devnm
,
1432 static char *container2devname(char *devname
)
1434 char *mdname
= NULL
;
1436 if (devname
[0] == '/') {
1437 int fd
= open(devname
, O_RDONLY
);
1439 mdname
= xstrdup(fd2devnm(fd
));
1444 struct map_ent
*mp
, *map
= NULL
;
1446 if (!parse_uuid(devname
, uuid
))
1448 mp
= map_by_uuid(&map
, uuid
);
1450 mdname
= xstrdup(mp
->devnm
);
1457 static int Incremental_container(struct supertype
*st
, char *devname
,
1458 struct context
*c
, char *only
)
1460 /* Collect the contents of this container and for each
1461 * array, choose a device name and assemble the array.
1464 struct mdinfo
*list
;
1466 struct map_ent
*map
= NULL
;
1469 struct mddev_ident
*match
;
1471 struct domainlist
*domains
;
1472 struct map_ent
*smp
;
1479 st
->ss
->getinfo_super(st
, &info
, NULL
);
1481 if ((c
->runstop
> 0 && info
.container_enough
>= 0) ||
1482 info
.container_enough
> 0)
1486 printf("MD_STARTED=no\n");
1487 } else if (c
->verbose
)
1488 pr_err("not enough devices to start the container\n");
1492 match
= conf_match(st
, &info
, devname
, c
->verbose
, &rv
);
1493 if (match
== NULL
&& rv
== 2)
1496 /* Need to compute 'trustworthy' */
1498 trustworthy
= LOCAL
;
1499 else if (st
->ss
->match_home(st
, c
->homehost
) == 1)
1500 trustworthy
= LOCAL
;
1501 else if (st
->ss
->match_home(st
, "any") == 1)
1502 trustworthy
= LOCAL
;
1504 trustworthy
= FOREIGN
;
1506 list
= st
->ss
->container_content(st
, NULL
);
1507 /* when nothing to activate - quit */
1510 printf("MD_STARTED=nothing\n");
1514 for (ra
= list
; ra
; ra
= ra
->next
) {
1516 char chosen_name
[1024];
1518 struct mddev_ident
*match
= NULL
;
1521 /* do not activate arrays blocked by metadata handler */
1522 if (ra
->array
.state
& (1 << MD_SB_BLOCK_VOLUME
)) {
1523 pr_err("Cannot activate array %s in %s.\n",
1524 ra
->text_version
, devname
);
1528 mp
= map_by_uuid(&map
, ra
->uuid
);
1531 mdfd
= open_dev(mp
->devnm
);
1533 strcpy(chosen_name
, mp
->path
);
1535 strcpy(chosen_name
, mp
->devnm
);
1538 /* Check in mdadm.conf for container == devname and
1539 * member == ra->text_version after second slash.
1541 char *sub
= strchr(ra
->text_version
+1, '/');
1542 struct mddev_ident
*array_list
;
1545 array_list
= conf_get_ident(NULL
);
1548 for(; array_list
; array_list
= array_list
->next
) {
1550 if (array_list
->member
== NULL
||
1551 array_list
->container
== NULL
)
1553 if (strcmp(array_list
->member
, sub
) != 0)
1555 if (array_list
->uuid_set
&&
1556 !same_uuid(ra
->uuid
, array_list
->uuid
, st
->ss
->swapuuid
))
1558 dn
= container2devname(array_list
->container
);
1561 if (strncmp(dn
, ra
->text_version
+1,
1563 ra
->text_version
[strlen(dn
)+1] != '/') {
1568 /* we have a match */
1571 pr_err("match found for member %s\n",
1572 array_list
->member
);
1576 if (match
&& match
->devname
&&
1577 strcasecmp(match
->devname
, "<ignore>") == 0) {
1579 pr_err("array %s/%s is "
1580 "explicitly ignored by mdadm.conf\n",
1581 match
->container
, match
->member
);
1585 trustworthy
= LOCAL
;
1587 mdfd
= create_mddev(match
? match
->devname
: NULL
,
1593 if (only
&& (!mp
|| strcmp(mp
->devnm
, only
) != 0))
1597 pr_err("failed to open %s: %s.\n",
1598 chosen_name
, strerror(errno
));
1602 assemble_container_content(st
, mdfd
, ra
, c
,
1603 chosen_name
, &result
);
1606 if (c
->export
&& result
) {
1608 printf("MD_STARTED");
1609 if (result
& INCR_NO
) {
1610 printf("%cno", sep
);
1613 if (result
& INCR_UNSAFE
) {
1614 printf("%cunsafe", sep
);
1617 if (result
& INCR_ALREADY
) {
1618 printf("%calready", sep
);
1621 if (result
& INCR_YES
) {
1622 printf("%cyes", sep
);
1628 /* don't move spares to container with volume being activated
1629 when all volumes are blocked */
1630 if (ra_all
== ra_blocked
)
1633 /* Now move all suitable spares from spare container */
1634 domains
= domain_from_array(list
, st
->ss
->name
);
1635 memcpy(suuid
, uuid_zero
, sizeof(int[4]));
1637 (smp
= map_by_uuid(&map
, suuid
)) != NULL
&&
1638 (sfd
= open(smp
->path
, O_RDONLY
)) >= 0) {
1639 /* spare container found */
1640 struct supertype
*sst
=
1641 super_imsm
.match_metadata_desc("imsm");
1642 struct mdinfo
*sinfo
;
1643 unsigned long long min_size
= 0;
1644 if (st
->ss
->min_acceptable_spare_size
)
1645 min_size
= st
->ss
->min_acceptable_spare_size(st
);
1646 if (!sst
->ss
->load_container(sst
, sfd
, NULL
)) {
1648 sinfo
= container_choose_spares(sst
, min_size
,
1651 sst
->ss
->free_super(sst
);
1654 struct mdinfo
*disks
= sinfo
->devs
;
1656 /* move spare from spare
1657 * container to currently
1663 makedev(disks
->disk
.major
,
1664 disks
->disk
.minor
)))
1666 disks
= disks
->next
;
1669 pr_err("Added %d spare%s to %s\n",
1670 count
, count
>1?"s":"", devname
);
1676 domain_free(domains
);
1680 static void run_udisks(char *arg1
, char *arg2
)
1685 execl("/usr/bin/udisks", "udisks", arg1
, arg2
, NULL
);
1686 execl("/bin/udisks", "udisks", arg1
, arg2
, NULL
);
1689 while (pid
> 0 && wait(&status
) != pid
)
1694 * IncrementalRemove - Attempt to see if the passed in device belongs to any
1695 * raid arrays, and if so first fail (if needed) and then remove the device.
1697 * @devname - The device we want to remove
1698 * @id_path - name as found in /dev/disk/by-path for this device
1700 * Note: the device name must be a kernel name like "sda", so
1701 * that we can find it in /proc/mdstat
1703 int IncrementalRemove(char *devname
, char *id_path
, int verbose
)
1707 struct mdstat_ent
*ent
;
1708 struct mddev_dev devlist
;
1713 dprintf(Name
": incremental removal without --path <id_path> "
1714 "lacks the possibility to re-add new device in this "
1717 if (strchr(devname
, '/')) {
1718 pr_err("incremental removal requires a "
1719 "kernel device name, not a file: %s\n", devname
);
1722 ent
= mdstat_by_component(devname
);
1725 pr_err("%s does not appear to be a component "
1726 "of any array\n", devname
);
1729 sysfs_init(&mdi
, -1, ent
->devnm
);
1730 if (sysfs_get_str(&mdi
, NULL
, "array_state",
1731 buf
, sizeof(buf
)) > 0) {
1732 if (strncmp(buf
, "active", 6) == 0 ||
1733 strncmp(buf
, "clean", 5) == 0)
1734 sysfs_set_str(&mdi
, NULL
,
1735 "array_state", "read-auto");
1737 mdfd
= open_dev(ent
->devnm
);
1740 pr_err("Cannot open array %s!!\n", ent
->dev
);
1746 struct map_ent
*map
= NULL
, *me
;
1747 me
= map_by_devnm(&map
, ent
->devnm
);
1749 policy_save_path(id_path
, me
);
1753 memset(&devlist
, 0, sizeof(devlist
));
1754 devlist
.devname
= devname
;
1755 devlist
.disposition
= 'f';
1756 /* for a container, we must fail each member array */
1757 if (ent
->metadata_version
&&
1758 strncmp(ent
->metadata_version
, "external:", 9) == 0) {
1759 struct mdstat_ent
*mdstat
= mdstat_read(0, 0);
1760 struct mdstat_ent
*memb
;
1761 for (memb
= mdstat
; memb
; memb
= memb
->next
)
1762 if (is_container_member(memb
, ent
->dev
)) {
1763 int subfd
= open_dev(memb
->devnm
);
1765 rv
|= Manage_subdevs(
1767 &devlist
, verbose
, 0,
1772 free_mdstat(mdstat
);
1774 rv
|= Manage_subdevs(ent
->dev
, mdfd
, &devlist
,
1775 verbose
, 0, NULL
, 0);
1777 /* Failed due to EBUSY, try to stop the array.
1778 * Give udisks a chance to unmount it first.
1780 int devid
= devnm2devid(ent
->devnm
);
1781 run_udisks("--unmount", map_dev(major(devid
),minor(devid
), 0));
1782 rv
= Manage_stop(ent
->dev
, mdfd
, verbose
, 1);
1784 /* At least we can try to trigger a 'remove' */
1785 sysfs_uevent(&mdi
, "remove");
1788 pr_err("Fail to stop %s too.\n", ent
->devnm
);
1791 devlist
.disposition
= 'r';
1792 rv
= Manage_subdevs(ent
->dev
, mdfd
, &devlist
,
1793 verbose
, 0, NULL
, 0);