]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Assemble.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
33 static int name_matches(char *found
, char *required
, char *homehost
)
35 /* See if the name found matches the required name, possibly
36 * prefixed with 'homehost'
40 strncpy(fnd
, found
, 32);
42 if (strcmp(found
, required
)==0)
45 int l
= strlen(homehost
);
46 if (l
< 32 && fnd
[l
] == ':' &&
47 strcmp(fnd
+l
+1, required
)==0)
53 static int is_member_busy(char *metadata_version
)
55 /* check if the given member array is active */
56 struct mdstat_ent
*mdstat
= mdstat_read(1, 0);
57 struct mdstat_ent
*ent
;
60 for (ent
= mdstat
; ent
; ent
= ent
->next
) {
61 if (ent
->metadata_version
== NULL
)
63 if (strncmp(ent
->metadata_version
, "external:", 9) != 0)
65 if (!is_subarray(&ent
->metadata_version
[9]))
67 /* Skip first char - it can be '/' or '-' */
68 if (strcmp(&ent
->metadata_version
[10], metadata_version
+1) == 0) {
78 int Assemble(struct supertype
*st
, char *mddev
,
80 mddev_dev_t devlist
, char *backup_file
,
81 int readonly
, int runstop
,
82 char *update
, char *homehost
,
83 int verbose
, int force
)
86 * The task of Assemble is to find a collection of
87 * devices that should (according to their superblocks)
88 * form an array, and to give this collection to the MD driver.
89 * In Linux-2.4 and later, this involves submitting a
90 * SET_ARRAY_INFO ioctl with no arg - to prepare
91 * the array - and then submit a number of
92 * ADD_NEW_DISK ioctls to add disks into
93 * the array. Finally RUN_ARRAY might
94 * be submitted to start the array.
96 * Much of the work of Assemble is in finding and/or
97 * checking the disks to make sure they look right.
99 * If mddev is not set, then scan must be set and we
100 * read through the config file for dev+uuid mapping
101 * We recurse, setting mddev, for each device that
103 * - has a valid uuid (or any uuid if !uuidset)
105 * If mddev is set, we try to determine state of md.
106 * check version - must be at least 0.90.0
107 * check kernel version. must be at least 2.4.
108 * If not, we can possibly fall back on START_ARRAY
109 * Try to GET_ARRAY_INFO.
110 * If possible, give up
111 * If not, try to STOP_ARRAY just to make sure
113 * If !uuidset and scan, look in conf-file for uuid
114 * If not found, give up
115 * If !devlist and scan and uuidset, get list of devs from conf-file
118 * Check superblock - discard if bad
119 * Check uuid (set if we don't have one) - discard if no match
120 * Check superblock similarity if we have a superblock - discard if different
121 * Record events, devicenum
122 * This should give us a list of devices for the array
123 * We should collect the most recent event number
125 * Count disks with recent enough event count
126 * While force && !enough disks
127 * Choose newest rejected disks, update event count
128 * mark clean and rewrite superblock
131 * foreach device with recent events : ADD_NEW_DISK
132 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
134 * Check the device numbers in superblock are right
135 * update superblock if any changes
141 int auto_assem
= (mddev
== NULL
&& !ident
->uuid_set
&&
142 ident
->super_minor
== UnSet
&& ident
->name
[0] == 0
143 && ident
->container
== NULL
&& ident
->member
== NULL
);
145 int vers
= vers
; /* Keep gcc quite - it really is initialised */
148 int uptodate
; /* set once we decide that this device is as
149 * recent as everything else in the array.
153 int *best
= NULL
; /* indexed by raid_disk */
154 unsigned int bestcnt
= 0;
156 unsigned int okcnt
, sparecnt
;
157 unsigned int req_cnt
;
163 int report_missmatch
;
165 int start_partial_ok
= (runstop
>= 0) &&
166 (force
|| devlist
==NULL
|| auto_assem
);
167 unsigned int num_devs
;
170 struct mdinfo
*content
= NULL
;
171 mdu_array_info_t tmp_inf
;
176 char chosen_name
[1024];
178 if (get_linux_version() < 2004000)
182 * If any subdevs are listed, then any that don't
183 * match ident are discarded. Remainder must all match and
185 * If no subdevs, then we scan all devices in the config file, but
186 * there must be something in the identity
190 ident
->uuid_set
== 0 &&
191 ident
->super_minor
< 0 &&
192 ident
->devices
== NULL
) {
193 fprintf(stderr
, Name
": No identity information available for %s - cannot assemble.\n",
194 mddev
? mddev
: "further assembly");
199 devlist
= conf_get_devs();
203 report_missmatch
= ((inargv
&& verbose
>= 0) || verbose
> 0);
205 /* We come back here when doing auto-assembly and attempting some
206 * set of devices failed. Those are now marked as ->used==2 and
207 * we ignore them and try again
210 tmpdev
= devlist
; num_devs
= 0;
216 tmpdev
= tmpdev
->next
;
218 devices
= malloc(num_devs
* sizeof(*devices
));
220 if (!st
&& ident
->st
) st
= ident
->st
;
223 fprintf(stderr
, Name
": looking for devices for %s\n",
224 mddev
? mddev
: "further assembly");
226 /* first walk the list of devices to find a consistent set
227 * that match the criterea, if that is possible.
228 * We flag the ones we like with 'used'.
230 for (tmpdev
= devlist
;
232 tmpdev
= tmpdev
->next
) {
233 char *devname
= tmpdev
->devname
;
236 struct supertype
*tst
= dup_super(st
);
238 if (tmpdev
->used
> 1) continue;
240 if (ident
->devices
&&
241 !match_oneof(ident
->devices
, devname
)) {
242 if (report_missmatch
)
243 fprintf(stderr
, Name
": %s is not one of %s\n", devname
, ident
->devices
);
247 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
249 if (report_missmatch
)
250 fprintf(stderr
, Name
": cannot open device %s: %s\n",
251 devname
, strerror(errno
));
253 } else if (fstat(dfd
, &stb
)< 0) {
255 fprintf(stderr
, Name
": fstat failed for %s: %s\n",
256 devname
, strerror(errno
));
258 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
259 fprintf(stderr
, Name
": %s is not a block device.\n",
262 } else if (!tst
&& (tst
= guess_super(dfd
)) == NULL
) {
263 if (report_missmatch
)
264 fprintf(stderr
, Name
": no recogniseable superblock on %s\n",
267 } else if (tst
->ss
->load_super(tst
,dfd
, NULL
)) {
268 if (report_missmatch
)
269 fprintf( stderr
, Name
": no RAID superblock on %s\n",
273 memset(content
, 0, sizeof(*content
));
274 tst
->ss
->getinfo_super(tst
, content
);
276 if (dfd
>= 0) close(dfd
);
278 if (tst
&& tst
->sb
&& tst
->ss
->container_content
279 && tst
->loaded_container
) {
280 /* tmpdev is a container. We need to be either
281 * looking for a member, or auto-assembling
284 /* already found some components, this cannot
287 if (report_missmatch
)
288 fprintf(stderr
, Name
": %s is a container, but we are looking for components\n",
293 if (ident
->container
) {
294 if (ident
->container
[0] == '/' &&
295 !same_dev(ident
->container
, devname
)) {
296 if (report_missmatch
)
297 fprintf(stderr
, Name
": %s is not the container required (%s)\n",
298 devname
, ident
->container
);
301 if (ident
->container
[0] != '/') {
304 if (!parse_uuid(ident
->container
, uuid
) ||
305 !same_uuid(content
->uuid
, uuid
, tst
->ss
->swapuuid
)) {
306 if (report_missmatch
)
307 fprintf(stderr
, Name
": %s has wrong UUID to be required container\n",
313 /* It is worth looking inside this container.
317 content
= tmpdev
->content
;
319 content
= tst
->ss
->container_content(tst
);
321 tmpdev
->content
= content
->next
;
322 if (tmpdev
->content
== NULL
)
325 } else if (ident
->container
|| ident
->member
) {
326 /* No chance of this matching if we don't have
328 if (report_missmatch
)
329 fprintf(stderr
, Name
"%s is not a container, and one is required.\n",
334 if (ident
->uuid_set
&& (!update
|| strcmp(update
, "uuid")!= 0) &&
336 same_uuid(content
->uuid
, ident
->uuid
, tst
->ss
->swapuuid
)==0)) {
337 if (report_missmatch
)
338 fprintf(stderr
, Name
": %s has wrong uuid.\n",
342 if (ident
->name
[0] && (!update
|| strcmp(update
, "name")!= 0) &&
344 name_matches(content
->name
, ident
->name
, homehost
)==0)) {
345 if (report_missmatch
)
346 fprintf(stderr
, Name
": %s has wrong name.\n",
350 if (ident
->super_minor
!= UnSet
&&
352 ident
->super_minor
!= content
->array
.md_minor
)) {
353 if (report_missmatch
)
354 fprintf(stderr
, Name
": %s has wrong super-minor.\n",
358 if (ident
->level
!= UnSet
&&
360 ident
->level
!= content
->array
.level
)) {
361 if (report_missmatch
)
362 fprintf(stderr
, Name
": %s has wrong raid level.\n",
366 if (ident
->raid_disks
!= UnSet
&&
368 ident
->raid_disks
!= content
->array
.raid_disks
)) {
369 if (report_missmatch
)
370 fprintf(stderr
, Name
": %s requires wrong number of drives.\n",
375 if (tst
== NULL
|| tst
->sb
== NULL
)
378 /* If we are this far, then we are nearly commited to this device.
379 * If the super_block doesn't exist, or doesn't match others,
380 * then we probably cannot continue
381 * However if one of the arrays is for the homehost, and
382 * the other isn't that can disambiguate.
385 if (!tst
|| !tst
->sb
) {
386 fprintf(stderr
, Name
": %s has no superblock - assembly aborted\n",
389 st
->ss
->free_super(st
);
393 if (tst
&& tst
->sb
&& tst
->ss
->container_content
394 && tst
->loaded_container
) {
395 /* we have the one container we need, don't keep
396 * looking. If the chosen member is active, skip.
398 if (is_member_busy(content
->text_version
)) {
399 if (report_missmatch
)
400 fprintf(stderr
, Name
": member %s in %s is already assembled\n",
401 content
->text_version
,
403 tst
->ss
->free_super(tst
);
410 st
= tst
; tst
= NULL
;
411 if (!auto_assem
&& tmpdev
->next
!= NULL
) {
412 fprintf(stderr
, Name
": %s is a container, but is not "
413 "only device given: confused and aborting\n",
415 st
->ss
->free_super(st
);
422 if (st
->minor_version
== -1)
423 st
->minor_version
= tst
->minor_version
;
424 if (st
->ss
!= tst
->ss
||
425 st
->minor_version
!= tst
->minor_version
||
426 st
->ss
->compare_super(st
, tst
) != 0) {
427 /* Some mismatch. If exactly one array matches this host,
428 * we can resolve on that one.
429 * Or, if we are auto assembling, we just ignore the second
435 int first
= st
->ss
->match_home(st
, homehost
);
436 int last
= tst
->ss
->match_home(tst
, homehost
);
438 (first
== 1 || last
== 1)) {
439 /* We can do something */
440 if (first
) {/* just ignore this one */
441 if (report_missmatch
)
442 fprintf(stderr
, Name
": %s misses out due to wrong homehost\n",
445 } else { /* reject all those sofar */
447 if (report_missmatch
)
448 fprintf(stderr
, Name
": %s overrides previous devices due to good homehost\n",
450 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
458 fprintf(stderr
, Name
": superblock on %s doesn't match others - assembly aborted\n",
460 tst
->ss
->free_super(tst
);
461 st
->ss
->free_super(st
);
471 tst
->ss
->free_super(tst
);
474 if (!st
|| !st
->sb
|| !content
)
477 /* Now need to open array the device. Use create_mddev */
478 if (content
== &info
)
479 st
->ss
->getinfo_super(st
, content
);
481 trustworthy
= FOREIGN
;
482 switch (st
->ss
->match_home(st
, homehost
)) {
484 trustworthy
= FOREIGN
;
485 name
= content
->name
;
489 name
= strchr(content
->name
, ':');
493 name
= content
->name
;
496 trustworthy
= FOREIGN
;
499 if (!auto_assem
&& trustworthy
== FOREIGN
)
500 /* If the array is listed in mdadm or on
501 * command line, then we trust the name
502 * even if the array doesn't look local
506 if (content
->name
[0] == 0 &&
507 content
->array
.level
== LEVEL_CONTAINER
) {
508 name
= content
->text_version
;
509 trustworthy
= METADATA
;
511 mdfd
= create_mddev(mddev
, name
, ident
->autof
, trustworthy
,
514 st
->ss
->free_super(st
);
521 vers
= md_get_version(mdfd
);
523 fprintf(stderr
, Name
": Assemble requires driver version 0.90.0 or later.\n"
524 " Upgrade your kernel or try --build\n");
528 if (ioctl(mdfd
, GET_ARRAY_INFO
, &tmp_inf
)==0) {
529 fprintf(stderr
, Name
": %s already active, cannot restart it!\n",
531 for (tmpdev
= devlist
;
532 tmpdev
&& tmpdev
->used
!= 1;
533 tmpdev
= tmpdev
->next
)
535 if (tmpdev
&& auto_assem
)
536 fprintf(stderr
, Name
": %s needed for %s...\n",
537 mddev
, tmpdev
->devname
);
540 st
->ss
->free_super(st
);
546 ioctl(mdfd
, STOP_ARRAY
, NULL
); /* just incase it was started but has no content */
549 if (content
!= &info
) {
550 /* This is a member of a container. Try starting the array. */
551 return assemble_container_content(st
, mdfd
, content
, runstop
,
552 chosen_name
, verbose
);
555 /* Ok, no bad inconsistancy, we can try updating etc */
557 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) if (tmpdev
->used
== 1) {
558 char *devname
= tmpdev
->devname
;
560 /* looks like a good enough match to update the super block if needed */
564 /* prepare useful information in info structures */
566 struct supertype
*tst
;
569 if (strcmp(update
, "uuid")==0 &&
572 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
573 read(rfd
, ident
->uuid
, 16) != 16) {
574 *(__u32
*)(ident
->uuid
) = random();
575 *(__u32
*)(ident
->uuid
+1) = random();
576 *(__u32
*)(ident
->uuid
+2) = random();
577 *(__u32
*)(ident
->uuid
+3) = random();
579 if (rfd
>= 0) close(rfd
);
581 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
583 remove_partitions(dfd
);
586 tst
->ss
->load_super(tst
, dfd
, NULL
);
587 tst
->ss
->getinfo_super(tst
, content
);
589 memcpy(content
->uuid
, ident
->uuid
, 16);
590 strcpy(content
->name
, ident
->name
);
591 content
->array
.md_minor
= minor(stb2
.st_rdev
);
593 tst
->ss
->update_super(tst
, content
, update
,
595 ident
->uuid_set
, homehost
);
596 if (strcmp(update
, "uuid")==0 &&
599 memcpy(ident
->uuid
, content
->uuid
, 16);
602 fprintf(stderr
, Name
": Cannot open %s for superblock update\n",
604 else if (tst
->ss
->store_super(tst
, dfd
))
605 fprintf(stderr
, Name
": Could not re-write superblock on %s.\n",
610 if (strcmp(update
, "uuid")==0 &&
611 ident
->bitmap_fd
>= 0 && !bitmap_done
) {
612 if (bitmap_update_uuid(ident
->bitmap_fd
,
614 tst
->ss
->swapuuid
) != 0)
615 fprintf(stderr
, Name
": Could not update uuid on external bitmap.\n");
619 tst
->ss
->free_super(tst
);
623 struct supertype
*tst
= dup_super(st
);
625 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
627 remove_partitions(dfd
);
629 tst
->ss
->load_super(tst
, dfd
, NULL
);
630 tst
->ss
->getinfo_super(tst
, content
);
631 tst
->ss
->free_super(tst
);
638 fprintf(stderr
, Name
": %s is identified as a member of %s, slot %d.\n",
639 devname
, mddev
, content
->disk
.raid_disk
);
640 devices
[devcnt
].devname
= devname
;
641 devices
[devcnt
].uptodate
= 0;
642 devices
[devcnt
].i
= *content
;
643 devices
[devcnt
].i
.disk
.major
= major(stb
.st_rdev
);
644 devices
[devcnt
].i
.disk
.minor
= minor(stb
.st_rdev
);
645 if (most_recent
< devcnt
) {
646 if (devices
[devcnt
].i
.events
647 > devices
[most_recent
].i
.events
)
648 most_recent
= devcnt
;
650 if (content
->array
.level
== -4)
651 /* with multipath, the raid_disk from the superblock is meaningless */
654 i
= devices
[devcnt
].i
.disk
.raid_disk
;
656 if (nextspare
< content
->array
.raid_disks
)
657 nextspare
= content
->array
.raid_disks
;
660 if (i
>= content
->array
.raid_disks
&&
666 unsigned int newbestcnt
= i
+10;
667 int *newbest
= malloc(sizeof(int)*newbestcnt
);
669 for (c
=0; c
< newbestcnt
; c
++)
671 newbest
[c
] = best
[c
];
676 bestcnt
= newbestcnt
;
679 devices
[best
[i
]].i
.events
680 == devices
[devcnt
].i
.events
681 && (devices
[best
[i
]].i
.disk
.minor
682 != devices
[devcnt
].i
.disk
.minor
)
684 && content
->array
.level
!= LEVEL_MULTIPATH
) {
685 /* two different devices with identical superblock.
686 * Could be a mis-detection caused by overlapping
687 * partitions. fail-safe.
689 fprintf(stderr
, Name
": WARNING %s and %s appear"
690 " to have very similar superblocks.\n"
691 " If they are really different, "
692 "please --zero the superblock on one\n"
693 " If they are the same or overlap,"
694 " please remove one from %s.\n",
695 devices
[best
[i
]].devname
, devname
,
696 inargv
? "the list" :
697 "the\n DEVICE list in mdadm.conf"
703 || (devices
[best
[i
]].i
.events
704 < devices
[devcnt
].i
.events
))
711 fprintf(stderr
, Name
": no devices found for %s\n",
714 st
->ss
->free_super(st
);
719 if (update
&& strcmp(update
, "byteorder")==0)
720 st
->minor_version
= 90;
722 st
->ss
->getinfo_super(st
, content
);
723 clean
= content
->array
.state
& 1;
725 /* now we have some devices that might be suitable.
728 avail
= malloc(content
->array
.raid_disks
);
729 memset(avail
, 0, content
->array
.raid_disks
);
732 for (i
=0; i
< bestcnt
;i
++) {
734 int event_margin
= 1; /* always allow a difference of '1'
735 * like the kernel does
738 /* note: we ignore error flags in multipath arrays
739 * as they don't make sense
741 if (content
->array
.level
!= -4)
742 if (!(devices
[j
].i
.disk
.state
& (1<<MD_DISK_SYNC
))) {
743 if (!(devices
[j
].i
.disk
.state
744 & (1<<MD_DISK_FAULTY
)))
748 if (devices
[j
].i
.events
+event_margin
>=
749 devices
[most_recent
].i
.events
) {
750 devices
[j
].uptodate
= 1;
751 if (i
< content
->array
.raid_disks
) {
758 while (force
&& !enough(content
->array
.level
, content
->array
.raid_disks
,
759 content
->array
.layout
, 1,
761 /* Choose the newest best drive which is
762 * not up-to-date, update the superblock
766 struct supertype
*tst
;
767 long long current_events
;
769 for (i
=0; i
<content
->array
.raid_disks
&& i
< bestcnt
; i
++) {
772 !devices
[j
].uptodate
&&
775 > devices
[chosen_drive
].i
.events
))
778 if (chosen_drive
< 0)
780 current_events
= devices
[chosen_drive
].i
.events
;
783 fprintf(stderr
, Name
": forcing event count in %s(%d) from %d upto %d\n",
784 devices
[chosen_drive
].devname
,
785 devices
[chosen_drive
].i
.disk
.raid_disk
,
786 (int)(devices
[chosen_drive
].i
.events
),
787 (int)(devices
[most_recent
].i
.events
));
788 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
790 fprintf(stderr
, Name
": Couldn't open %s for write - not updating\n",
791 devices
[chosen_drive
].devname
);
792 devices
[chosen_drive
].i
.events
= 0;
796 if (tst
->ss
->load_super(tst
,fd
, NULL
)) {
798 fprintf(stderr
, Name
": RAID superblock disappeared from %s - not updating.\n",
799 devices
[chosen_drive
].devname
);
800 devices
[chosen_drive
].i
.events
= 0;
803 content
->events
= devices
[most_recent
].i
.events
;
804 tst
->ss
->update_super(tst
, content
, "force-one",
805 devices
[chosen_drive
].devname
, verbose
,
808 if (tst
->ss
->store_super(tst
, fd
)) {
810 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
811 devices
[chosen_drive
].devname
);
812 devices
[chosen_drive
].i
.events
= 0;
813 tst
->ss
->free_super(tst
);
817 devices
[chosen_drive
].i
.events
= devices
[most_recent
].i
.events
;
818 devices
[chosen_drive
].uptodate
= 1;
819 avail
[chosen_drive
] = 1;
821 tst
->ss
->free_super(tst
);
823 /* If there are any other drives of the same vintage,
824 * add them in as well. We can't lose and we might gain
826 for (i
=0; i
<content
->array
.raid_disks
&& i
< bestcnt
; i
++) {
829 !devices
[j
].uptodate
&&
830 devices
[j
].i
.events
== current_events
) {
837 /* Now we want to look at the superblock which the kernel will base things on
838 * and compare the devices that we think are working with the devices that the
839 * superblock thinks are working.
840 * If there are differences and --force is given, then update this chosen
844 st
->ss
->free_super(st
);
845 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
++) {
851 if (!devices
[j
].uptodate
)
854 if ((fd
=dev_open(devices
[j
].devname
, O_RDONLY
|O_EXCL
))< 0) {
855 fprintf(stderr
, Name
": Cannot open %s: %s\n",
856 devices
[j
].devname
, strerror(errno
));
860 if (st
->ss
->load_super(st
,fd
, NULL
)) {
862 fprintf(stderr
, Name
": RAID superblock has disappeared from %s\n",
869 if (st
->sb
== NULL
) {
870 fprintf(stderr
, Name
": No suitable drives found for %s\n", mddev
);
874 st
->ss
->getinfo_super(st
, content
);
876 sysfs_init(content
, mdfd
, 0);
878 for (i
=0; i
<bestcnt
; i
++) {
880 unsigned int desired_state
;
882 if (i
< content
->array
.raid_disks
)
883 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
889 if (!devices
[j
].uptodate
)
892 devices
[j
].i
.disk
.state
= desired_state
;
893 if (!(devices
[j
].i
.array
.state
& 1))
896 if (st
->ss
->update_super(st
, &devices
[j
].i
, "assemble", NULL
,
900 fprintf(stderr
, Name
": "
901 "clearing FAULTY flag for device %d in %s for %s\n",
902 j
, mddev
, devices
[j
].devname
);
906 fprintf(stderr
, Name
": "
907 "device %d in %s has wrong state in superblock, but %s seems ok\n",
908 i
, mddev
, devices
[j
].devname
);
912 if (!(super
.disks
[i
].i
.disk
.state
& (1 << MD_DISK_FAULTY
))) {
913 fprintf(stderr
, Name
": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
918 if (force
&& !clean
&&
919 !enough(content
->array
.level
, content
->array
.raid_disks
,
920 content
->array
.layout
, clean
,
922 change
+= st
->ss
->update_super(st
, content
, "force-array",
923 devices
[chosen_drive
].devname
, verbose
,
930 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
932 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
933 devices
[chosen_drive
].devname
);
937 if (st
->ss
->store_super(st
, fd
)) {
939 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
940 devices
[chosen_drive
].devname
);
947 /* If we are in the middle of a reshape we may need to restore saved data
948 * that was moved aside due to the reshape overwriting live data
949 * The code of doing this lives in Grow.c
952 if (content
->reshape_active
) {
954 int *fdlist
= malloc(sizeof(int)* bestcnt
);
955 for (i
=0; i
<bestcnt
; i
++) {
958 fdlist
[i
] = dev_open(devices
[j
].devname
, O_RDWR
|O_EXCL
);
960 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
969 err
= Grow_restart(st
, content
, fdlist
, bestcnt
, backup_file
);
972 if (fdlist
[i
]>=0) close(fdlist
[i
]);
975 fprintf(stderr
, Name
": Failed to restore critical section for reshape, sorry.\n");
981 /* count number of in-sync devices according to the superblock.
982 * We must have this number to start the array without -s or -R
984 req_cnt
= content
->array
.working_disks
;
986 /* Almost ready to actually *do* something */
990 /* First, fill in the map, so that udev can find our name
991 * as soon as we become active.
993 map_update(NULL
, fd2devnum(mdfd
), content
->text_version
,
994 content
->uuid
, chosen_name
);
996 rv
= set_array_info(mdfd
, st
, content
);
998 fprintf(stderr
, Name
": failed to set array info for %s: %s\n",
999 mddev
, strerror(errno
));
1003 if (ident
->bitmap_fd
>= 0) {
1004 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
1005 fprintf(stderr
, Name
": SET_BITMAP_FILE failed.\n");
1009 } else if (ident
->bitmap_file
) {
1010 /* From config file */
1011 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
1013 fprintf(stderr
, Name
": Could not open bitmap file %s\n",
1014 ident
->bitmap_file
);
1018 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
1019 fprintf(stderr
, Name
": Failed to set bitmapfile for %s\n", mddev
);
1027 /* First, add the raid disks, but add the chosen one last */
1028 for (i
=0; i
<= bestcnt
; i
++) {
1032 if (j
== chosen_drive
)
1037 if (j
>= 0 /* && devices[j].uptodate */) {
1038 rv
= add_disk(mdfd
, st
, content
, &devices
[j
].i
);
1041 fprintf(stderr
, Name
": failed to add "
1046 if (i
< content
->array
.raid_disks
1051 } else if (verbose
> 0)
1052 fprintf(stderr
, Name
": added %s "
1054 devices
[j
].devname
, mddev
,
1055 devices
[j
].i
.disk
.raid_disk
);
1056 } else if (verbose
> 0 && i
< content
->array
.raid_disks
)
1057 fprintf(stderr
, Name
": no uptodate device for "
1062 if (content
->array
.level
== LEVEL_CONTAINER
) {
1064 fprintf(stderr
, Name
": Container %s has been "
1065 "assembled with %d drive%s",
1066 mddev
, okcnt
+sparecnt
, okcnt
+sparecnt
==1?"":"s");
1067 if (okcnt
< content
->array
.raid_disks
)
1068 fprintf(stderr
, " (out of %d)",
1069 content
->array
.raid_disks
);
1070 fprintf(stderr
, "\n");
1072 sysfs_uevent(content
, "change");
1073 wait_for(chosen_name
);
1080 ( enough(content
->array
.level
, content
->array
.raid_disks
,
1081 content
->array
.layout
, clean
, avail
, okcnt
) &&
1082 (okcnt
>= req_cnt
|| start_partial_ok
)
1084 if (ioctl(mdfd
, RUN_ARRAY
, NULL
)==0) {
1086 fprintf(stderr
, Name
": %s has been started with %d drive%s",
1087 mddev
, okcnt
, okcnt
==1?"":"s");
1088 if (okcnt
< content
->array
.raid_disks
)
1089 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
1091 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1092 fprintf(stderr
, ".\n");
1094 if (content
->reshape_active
&&
1095 content
->array
.level
>= 4 &&
1096 content
->array
.level
<= 6) {
1097 /* might need to increase the size
1098 * of the stripe cache - default is 256
1100 if (256 < 4 * (content
->array
.chunk_size
/4096)) {
1101 struct mdinfo
*sra
= sysfs_read(mdfd
, 0, 0);
1103 sysfs_set_num(sra
, NULL
,
1104 "stripe_cache_size",
1105 (4 * content
->array
.chunk_size
/ 4096) + 1);
1112 /* There is a nasty race with 'mdadm --monitor'.
1113 * If it opens this device before we close it,
1114 * it gets an incomplete open on which IO
1115 * doesn't work and the capacity is
1117 * If we reopen (to check for layered devices)
1118 * before --monitor closes, we loose.
1120 * So: wait upto 1 second for there to be
1121 * a non-zero capacity.
1123 while (usecs
< 1000) {
1124 mdfd
= open(mddev
, O_RDONLY
);
1126 unsigned long long size
;
1127 if (get_dev_size(mdfd
, NULL
, &size
) &&
1138 fprintf(stderr
, Name
": failed to RUN_ARRAY %s: %s\n",
1139 mddev
, strerror(errno
));
1141 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1142 content
->array
.layout
, 1, avail
, okcnt
))
1143 fprintf(stderr
, Name
": Not enough devices to "
1144 "start the array.\n");
1145 else if (!enough(content
->array
.level
,
1146 content
->array
.raid_disks
,
1147 content
->array
.layout
, clean
,
1149 fprintf(stderr
, Name
": Not enough devices to "
1150 "start the array while not clean "
1151 "- consider --force.\n");
1154 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1158 if (runstop
== -1) {
1159 fprintf(stderr
, Name
": %s assembled from %d drive%s",
1160 mddev
, okcnt
, okcnt
==1?"":"s");
1161 if (okcnt
!= content
->array
.raid_disks
)
1162 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
1163 fprintf(stderr
, ", but not started.\n");
1167 if (verbose
>= -1) {
1168 fprintf(stderr
, Name
": %s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
1170 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1171 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1172 content
->array
.layout
, 1, avail
, okcnt
))
1173 fprintf(stderr
, " - not enough to start the array.\n");
1174 else if (!enough(content
->array
.level
,
1175 content
->array
.raid_disks
,
1176 content
->array
.layout
, clean
,
1178 fprintf(stderr
, " - not enough to start the "
1179 "array while not clean - consider "
1182 if (req_cnt
== content
->array
.raid_disks
)
1183 fprintf(stderr
, " - need all %d to start it", req_cnt
);
1185 fprintf(stderr
, " - need %d of %d to start", req_cnt
, content
->array
.raid_disks
);
1186 fprintf(stderr
, " (use --run to insist).\n");
1190 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1194 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1195 * been updated to point to the current locations of devices.
1196 * so we can just start the array
1199 dev
= makedev(devices
[chosen_drive
].i
.disk
.major
,
1200 devices
[chosen_drive
].i
.disk
.minor
);
1201 if (ioctl(mdfd
, START_ARRAY
, dev
)) {
1202 fprintf(stderr
, Name
": Cannot start array: %s\n",
1212 int assemble_container_content(struct supertype
*st
, int mdfd
,
1213 struct mdinfo
*content
, int runstop
,
1214 char *chosen_name
, int verbose
)
1216 struct mdinfo
*dev
, *sra
;
1217 int working
= 0, preexist
= 0;
1218 struct map_ent
*map
= NULL
;
1220 sysfs_init(content
, mdfd
, 0);
1222 sra
= sysfs_read(mdfd
, 0, GET_VERSION
);
1223 if (sra
== NULL
|| strcmp(sra
->text_version
, content
->text_version
) != 0)
1224 if (sysfs_set_array(content
, md_get_version(mdfd
)) != 0) {
1231 for (dev
= content
->devs
; dev
; dev
= dev
->next
)
1232 if (sysfs_add_disk(content
, dev
) == 0)
1234 else if (errno
== EEXIST
)
1238 return 1;/* Nothing new, don't try to start */
1239 } else if (runstop
> 0 ||
1240 (working
+ preexist
) >= content
->array
.working_disks
) {
1242 map_update(&map
, fd2devnum(mdfd
),
1243 content
->text_version
,
1244 content
->uuid
, chosen_name
);
1245 switch(content
->array
.level
) {
1247 case LEVEL_MULTIPATH
:
1249 sysfs_set_str(content
, NULL
, "array_state",
1253 sysfs_set_str(content
, NULL
, "array_state",
1255 /* start mdmon if needed. */
1256 if (!mdmon_running(st
->container_dev
))
1257 start_mdmon(st
->container_dev
);
1258 ping_monitor(devnum2devname(st
->container_dev
));
1261 sysfs_set_safemode(content
, content
->safe_mode_delay
);
1263 fprintf(stderr
, Name
1264 ": Started %s with %d devices",
1265 chosen_name
, working
+ preexist
);
1267 fprintf(stderr
, " (%d new)", working
);
1268 fprintf(stderr
, "\n");
1270 wait_for(chosen_name
);
1273 /* FIXME should have an O_EXCL and wait for read-auto */
1276 fprintf(stderr
, Name
1277 ": %s assembled with %d devices but "
1279 chosen_name
, working
);