]>
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
)) {
401 fprintf(stderr
, Name
": member %s in %s is already assembled\n",
402 content
->text_version
,
404 tst
->ss
->free_super(tst
);
407 st
= tst
; tst
= NULL
;
408 if (!auto_assem
&& tmpdev
->next
!= NULL
) {
409 fprintf(stderr
, Name
": %s is a container, but is not "
410 "only device given: confused and aborting\n",
412 st
->ss
->free_super(st
);
419 if (st
->minor_version
== -1)
420 st
->minor_version
= tst
->minor_version
;
421 if (st
->ss
!= tst
->ss
||
422 st
->minor_version
!= tst
->minor_version
||
423 st
->ss
->compare_super(st
, tst
) != 0) {
424 /* Some mismatch. If exactly one array matches this host,
425 * we can resolve on that one.
426 * Or, if we are auto assembling, we just ignore the second
432 int first
= st
->ss
->match_home(st
, homehost
);
433 int last
= tst
->ss
->match_home(tst
, homehost
);
435 (first
== 1 || last
== 1)) {
436 /* We can do something */
437 if (first
) {/* just ignore this one */
438 if (report_missmatch
)
439 fprintf(stderr
, Name
": %s misses out due to wrong homehost\n",
442 } else { /* reject all those sofar */
444 if (report_missmatch
)
445 fprintf(stderr
, Name
": %s overrides previous devices due to good homehost\n",
447 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
455 fprintf(stderr
, Name
": superblock on %s doesn't match others - assembly aborted\n",
457 tst
->ss
->free_super(tst
);
458 st
->ss
->free_super(st
);
468 tst
->ss
->free_super(tst
);
471 if (!st
|| !st
->sb
|| !content
)
474 /* Now need to open array the device. Use create_mddev */
475 if (content
== &info
)
476 st
->ss
->getinfo_super(st
, content
);
478 trustworthy
= FOREIGN
;
479 switch (st
->ss
->match_home(st
, homehost
)) {
481 trustworthy
= FOREIGN
;
482 name
= content
->name
;
486 name
= strchr(content
->name
, ':');
490 name
= content
->name
;
493 trustworthy
= FOREIGN
;
496 if (!auto_assem
&& trustworthy
== FOREIGN
)
497 /* If the array is listed in mdadm or on
498 * command line, then we trust the name
499 * even if the array doesn't look local
503 if (content
->name
[0] == 0 &&
504 content
->array
.level
== LEVEL_CONTAINER
) {
505 name
= content
->text_version
;
506 trustworthy
= METADATA
;
508 mdfd
= create_mddev(mddev
, name
, ident
->autof
, trustworthy
,
511 st
->ss
->free_super(st
);
518 vers
= md_get_version(mdfd
);
520 fprintf(stderr
, Name
": Assemble requires driver version 0.90.0 or later.\n"
521 " Upgrade your kernel or try --build\n");
525 if (ioctl(mdfd
, GET_ARRAY_INFO
, &tmp_inf
)==0) {
526 fprintf(stderr
, Name
": %s already active, cannot restart it!\n",
528 for (tmpdev
= devlist
;
529 tmpdev
&& tmpdev
->used
!= 1;
530 tmpdev
= tmpdev
->next
)
532 if (tmpdev
&& auto_assem
)
533 fprintf(stderr
, Name
": %s needed for %s...\n",
534 mddev
, tmpdev
->devname
);
537 st
->ss
->free_super(st
);
543 ioctl(mdfd
, STOP_ARRAY
, NULL
); /* just incase it was started but has no content */
546 if (content
!= &info
) {
547 /* This is a member of a container. Try starting the array. */
548 return assemble_container_content(st
, mdfd
, content
, runstop
,
549 chosen_name
, verbose
);
552 /* Ok, no bad inconsistancy, we can try updating etc */
554 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) if (tmpdev
->used
== 1) {
555 char *devname
= tmpdev
->devname
;
557 /* looks like a good enough match to update the super block if needed */
561 /* prepare useful information in info structures */
563 struct supertype
*tst
;
566 if (strcmp(update
, "uuid")==0 &&
569 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
570 read(rfd
, ident
->uuid
, 16) != 16) {
571 *(__u32
*)(ident
->uuid
) = random();
572 *(__u32
*)(ident
->uuid
+1) = random();
573 *(__u32
*)(ident
->uuid
+2) = random();
574 *(__u32
*)(ident
->uuid
+3) = random();
576 if (rfd
>= 0) close(rfd
);
578 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
580 remove_partitions(dfd
);
583 tst
->ss
->load_super(tst
, dfd
, NULL
);
584 tst
->ss
->getinfo_super(tst
, content
);
586 memcpy(content
->uuid
, ident
->uuid
, 16);
587 strcpy(content
->name
, ident
->name
);
588 content
->array
.md_minor
= minor(stb2
.st_rdev
);
590 tst
->ss
->update_super(tst
, content
, update
,
592 ident
->uuid_set
, homehost
);
593 if (strcmp(update
, "uuid")==0 &&
596 memcpy(ident
->uuid
, content
->uuid
, 16);
599 fprintf(stderr
, Name
": Cannot open %s for superblock update\n",
601 else if (tst
->ss
->store_super(tst
, dfd
))
602 fprintf(stderr
, Name
": Could not re-write superblock on %s.\n",
607 if (strcmp(update
, "uuid")==0 &&
608 ident
->bitmap_fd
>= 0 && !bitmap_done
) {
609 if (bitmap_update_uuid(ident
->bitmap_fd
,
611 tst
->ss
->swapuuid
) != 0)
612 fprintf(stderr
, Name
": Could not update uuid on external bitmap.\n");
616 tst
->ss
->free_super(tst
);
620 struct supertype
*tst
= dup_super(st
);
622 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
624 remove_partitions(dfd
);
626 tst
->ss
->load_super(tst
, dfd
, NULL
);
627 tst
->ss
->getinfo_super(tst
, content
);
628 tst
->ss
->free_super(tst
);
635 fprintf(stderr
, Name
": %s is identified as a member of %s, slot %d.\n",
636 devname
, mddev
, content
->disk
.raid_disk
);
637 devices
[devcnt
].devname
= devname
;
638 devices
[devcnt
].uptodate
= 0;
639 devices
[devcnt
].i
= *content
;
640 devices
[devcnt
].i
.disk
.major
= major(stb
.st_rdev
);
641 devices
[devcnt
].i
.disk
.minor
= minor(stb
.st_rdev
);
642 if (most_recent
< devcnt
) {
643 if (devices
[devcnt
].i
.events
644 > devices
[most_recent
].i
.events
)
645 most_recent
= devcnt
;
647 if (content
->array
.level
== -4)
648 /* with multipath, the raid_disk from the superblock is meaningless */
651 i
= devices
[devcnt
].i
.disk
.raid_disk
;
653 if (nextspare
< content
->array
.raid_disks
)
654 nextspare
= content
->array
.raid_disks
;
657 if (i
>= content
->array
.raid_disks
&&
663 unsigned int newbestcnt
= i
+10;
664 int *newbest
= malloc(sizeof(int)*newbestcnt
);
666 for (c
=0; c
< newbestcnt
; c
++)
668 newbest
[c
] = best
[c
];
673 bestcnt
= newbestcnt
;
676 devices
[best
[i
]].i
.events
677 == devices
[devcnt
].i
.events
678 && (devices
[best
[i
]].i
.disk
.minor
679 != devices
[devcnt
].i
.disk
.minor
)
681 && content
->array
.level
!= LEVEL_MULTIPATH
) {
682 /* two different devices with identical superblock.
683 * Could be a mis-detection caused by overlapping
684 * partitions. fail-safe.
686 fprintf(stderr
, Name
": WARNING %s and %s appear"
687 " to have very similar superblocks.\n"
688 " If they are really different, "
689 "please --zero the superblock on one\n"
690 " If they are the same or overlap,"
691 " please remove one from %s.\n",
692 devices
[best
[i
]].devname
, devname
,
693 inargv
? "the list" :
694 "the\n DEVICE list in mdadm.conf"
700 || (devices
[best
[i
]].i
.events
701 < devices
[devcnt
].i
.events
))
708 fprintf(stderr
, Name
": no devices found for %s\n",
711 st
->ss
->free_super(st
);
716 if (update
&& strcmp(update
, "byteorder")==0)
717 st
->minor_version
= 90;
719 st
->ss
->getinfo_super(st
, content
);
720 clean
= content
->array
.state
& 1;
722 /* now we have some devices that might be suitable.
725 avail
= malloc(content
->array
.raid_disks
);
726 memset(avail
, 0, content
->array
.raid_disks
);
729 for (i
=0; i
< bestcnt
;i
++) {
731 int event_margin
= 1; /* always allow a difference of '1'
732 * like the kernel does
735 /* note: we ignore error flags in multipath arrays
736 * as they don't make sense
738 if (content
->array
.level
!= -4)
739 if (!(devices
[j
].i
.disk
.state
& (1<<MD_DISK_SYNC
))) {
740 if (!(devices
[j
].i
.disk
.state
741 & (1<<MD_DISK_FAULTY
)))
745 if (devices
[j
].i
.events
+event_margin
>=
746 devices
[most_recent
].i
.events
) {
747 devices
[j
].uptodate
= 1;
748 if (i
< content
->array
.raid_disks
) {
755 while (force
&& !enough(content
->array
.level
, content
->array
.raid_disks
,
756 content
->array
.layout
, 1,
758 /* Choose the newest best drive which is
759 * not up-to-date, update the superblock
763 struct supertype
*tst
;
764 long long current_events
;
766 for (i
=0; i
<content
->array
.raid_disks
&& i
< bestcnt
; i
++) {
769 !devices
[j
].uptodate
&&
770 devices
[j
].i
.events
> 0 &&
773 > devices
[chosen_drive
].i
.events
))
776 if (chosen_drive
< 0)
778 current_events
= devices
[chosen_drive
].i
.events
;
781 fprintf(stderr
, Name
": forcing event count in %s(%d) from %d upto %d\n",
782 devices
[chosen_drive
].devname
,
783 devices
[chosen_drive
].i
.disk
.raid_disk
,
784 (int)(devices
[chosen_drive
].i
.events
),
785 (int)(devices
[most_recent
].i
.events
));
786 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
788 fprintf(stderr
, Name
": Couldn't open %s for write - not updating\n",
789 devices
[chosen_drive
].devname
);
790 devices
[chosen_drive
].i
.events
= 0;
794 if (tst
->ss
->load_super(tst
,fd
, NULL
)) {
796 fprintf(stderr
, Name
": RAID superblock disappeared from %s - not updating.\n",
797 devices
[chosen_drive
].devname
);
798 devices
[chosen_drive
].i
.events
= 0;
801 content
->events
= devices
[most_recent
].i
.events
;
802 tst
->ss
->update_super(tst
, content
, "force-one",
803 devices
[chosen_drive
].devname
, verbose
,
806 if (tst
->ss
->store_super(tst
, fd
)) {
808 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
809 devices
[chosen_drive
].devname
);
810 devices
[chosen_drive
].i
.events
= 0;
811 tst
->ss
->free_super(tst
);
815 devices
[chosen_drive
].i
.events
= devices
[most_recent
].i
.events
;
816 devices
[chosen_drive
].uptodate
= 1;
817 avail
[chosen_drive
] = 1;
819 tst
->ss
->free_super(tst
);
821 /* If there are any other drives of the same vintage,
822 * add them in as well. We can't lose and we might gain
824 for (i
=0; i
<content
->array
.raid_disks
&& i
< bestcnt
; i
++) {
827 !devices
[j
].uptodate
&&
828 devices
[j
].i
.events
> 0 &&
829 devices
[j
].i
.events
== current_events
) {
836 /* Now we want to look at the superblock which the kernel will base things on
837 * and compare the devices that we think are working with the devices that the
838 * superblock thinks are working.
839 * If there are differences and --force is given, then update this chosen
843 st
->ss
->free_super(st
);
844 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
++) {
850 if (!devices
[j
].uptodate
)
853 if ((fd
=dev_open(devices
[j
].devname
, O_RDONLY
|O_EXCL
))< 0) {
854 fprintf(stderr
, Name
": Cannot open %s: %s\n",
855 devices
[j
].devname
, strerror(errno
));
859 if (st
->ss
->load_super(st
,fd
, NULL
)) {
861 fprintf(stderr
, Name
": RAID superblock has disappeared from %s\n",
868 if (st
->sb
== NULL
) {
869 fprintf(stderr
, Name
": No suitable drives found for %s\n", mddev
);
873 st
->ss
->getinfo_super(st
, content
);
875 sysfs_init(content
, mdfd
, 0);
877 for (i
=0; i
<bestcnt
; i
++) {
879 unsigned int desired_state
;
881 if (i
< content
->array
.raid_disks
)
882 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
888 if (!devices
[j
].uptodate
)
891 devices
[j
].i
.disk
.state
= desired_state
;
893 if (st
->ss
->update_super(st
, &devices
[j
].i
, "assemble", NULL
,
897 fprintf(stderr
, Name
": "
898 "clearing FAULTY flag for device %d in %s for %s\n",
899 j
, mddev
, devices
[j
].devname
);
903 fprintf(stderr
, Name
": "
904 "device %d in %s has wrong state in superblock, but %s seems ok\n",
905 i
, mddev
, devices
[j
].devname
);
909 if (!(super
.disks
[i
].i
.disk
.state
& (1 << MD_DISK_FAULTY
))) {
910 fprintf(stderr
, Name
": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
915 if (force
&& !clean
&&
916 !enough(content
->array
.level
, content
->array
.raid_disks
,
917 content
->array
.layout
, clean
,
919 change
+= st
->ss
->update_super(st
, content
, "force-array",
920 devices
[chosen_drive
].devname
, verbose
,
927 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
929 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
930 devices
[chosen_drive
].devname
);
934 if (st
->ss
->store_super(st
, fd
)) {
936 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
937 devices
[chosen_drive
].devname
);
944 /* If we are in the middle of a reshape we may need to restore saved data
945 * that was moved aside due to the reshape overwriting live data
946 * The code of doing this lives in Grow.c
949 if (content
->reshape_active
) {
951 int *fdlist
= malloc(sizeof(int)* bestcnt
);
952 for (i
=0; i
<bestcnt
; i
++) {
955 fdlist
[i
] = dev_open(devices
[j
].devname
, O_RDWR
|O_EXCL
);
957 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
966 err
= Grow_restart(st
, content
, fdlist
, bestcnt
, backup_file
);
969 if (fdlist
[i
]>=0) close(fdlist
[i
]);
972 fprintf(stderr
, Name
": Failed to restore critical section for reshape, sorry.\n");
978 /* count number of in-sync devices according to the superblock.
979 * We must have this number to start the array without -s or -R
981 req_cnt
= content
->array
.working_disks
;
983 /* Almost ready to actually *do* something */
987 /* First, fill in the map, so that udev can find our name
988 * as soon as we become active.
990 map_update(NULL
, fd2devnum(mdfd
), content
->text_version
,
991 content
->uuid
, chosen_name
);
993 rv
= set_array_info(mdfd
, st
, content
);
995 fprintf(stderr
, Name
": failed to set array info for %s: %s\n",
996 mddev
, strerror(errno
));
1000 if (ident
->bitmap_fd
>= 0) {
1001 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
1002 fprintf(stderr
, Name
": SET_BITMAP_FILE failed.\n");
1006 } else if (ident
->bitmap_file
) {
1007 /* From config file */
1008 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
1010 fprintf(stderr
, Name
": Could not open bitmap file %s\n",
1011 ident
->bitmap_file
);
1015 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
1016 fprintf(stderr
, Name
": Failed to set bitmapfile for %s\n", mddev
);
1024 /* First, add the raid disks, but add the chosen one last */
1025 for (i
=0; i
<= bestcnt
; i
++) {
1029 if (j
== chosen_drive
)
1034 if (j
>= 0 /* && devices[j].uptodate */) {
1035 rv
= add_disk(mdfd
, st
, content
, &devices
[j
].i
);
1038 fprintf(stderr
, Name
": failed to add "
1043 if (i
< content
->array
.raid_disks
1048 } else if (verbose
> 0)
1049 fprintf(stderr
, Name
": added %s "
1051 devices
[j
].devname
, mddev
,
1052 devices
[j
].i
.disk
.raid_disk
);
1053 } else if (verbose
> 0 && i
< content
->array
.raid_disks
)
1054 fprintf(stderr
, Name
": no uptodate device for "
1059 if (content
->array
.level
== LEVEL_CONTAINER
) {
1061 fprintf(stderr
, Name
": Container %s has been "
1062 "assembled with %d drive%s",
1063 mddev
, okcnt
+sparecnt
, okcnt
+sparecnt
==1?"":"s");
1064 if (okcnt
< content
->array
.raid_disks
)
1065 fprintf(stderr
, " (out of %d)",
1066 content
->array
.raid_disks
);
1067 fprintf(stderr
, "\n");
1069 sysfs_uevent(content
, "change");
1076 ( enough(content
->array
.level
, content
->array
.raid_disks
,
1077 content
->array
.layout
, clean
, avail
, okcnt
) &&
1078 (okcnt
>= req_cnt
|| start_partial_ok
)
1080 if (ioctl(mdfd
, RUN_ARRAY
, NULL
)==0) {
1082 fprintf(stderr
, Name
": %s has been started with %d drive%s",
1083 mddev
, okcnt
, okcnt
==1?"":"s");
1084 if (okcnt
< content
->array
.raid_disks
)
1085 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
1087 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1088 fprintf(stderr
, ".\n");
1093 /* There is a nasty race with 'mdadm --monitor'.
1094 * If it opens this device before we close it,
1095 * it gets an incomplete open on which IO
1096 * doesn't work and the capacity is
1098 * If we reopen (to check for layered devices)
1099 * before --monitor closes, we loose.
1101 * So: wait upto 1 second for there to be
1102 * a non-zero capacity.
1104 while (usecs
< 1000) {
1105 mdfd
= open(mddev
, O_RDONLY
);
1107 unsigned long long size
;
1108 if (get_dev_size(mdfd
, NULL
, &size
) &&
1119 fprintf(stderr
, Name
": failed to RUN_ARRAY %s: %s\n",
1120 mddev
, strerror(errno
));
1122 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1123 content
->array
.layout
, 1, avail
, okcnt
))
1124 fprintf(stderr
, Name
": Not enough devices to "
1125 "start the array.\n");
1126 else if (!enough(content
->array
.level
,
1127 content
->array
.raid_disks
,
1128 content
->array
.layout
, clean
,
1130 fprintf(stderr
, Name
": Not enough devices to "
1131 "start the array while not clean "
1132 "- consider --force.\n");
1135 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1139 if (runstop
== -1) {
1140 fprintf(stderr
, Name
": %s assembled from %d drive%s",
1141 mddev
, okcnt
, okcnt
==1?"":"s");
1142 if (okcnt
!= content
->array
.raid_disks
)
1143 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
1144 fprintf(stderr
, ", but not started.\n");
1148 if (verbose
>= -1) {
1149 fprintf(stderr
, Name
": %s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
1151 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1152 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1153 content
->array
.layout
, 1, avail
, okcnt
))
1154 fprintf(stderr
, " - not enough to start the array.\n");
1155 else if (!enough(content
->array
.level
,
1156 content
->array
.raid_disks
,
1157 content
->array
.layout
, clean
,
1159 fprintf(stderr
, " - not enough to start the "
1160 "array while not clean - consider "
1163 if (req_cnt
== content
->array
.raid_disks
)
1164 fprintf(stderr
, " - need all %d to start it", req_cnt
);
1166 fprintf(stderr
, " - need %d of %d to start", req_cnt
, content
->array
.raid_disks
);
1167 fprintf(stderr
, " (use --run to insist).\n");
1171 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1175 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1176 * been updated to point to the current locations of devices.
1177 * so we can just start the array
1180 dev
= makedev(devices
[chosen_drive
].i
.disk
.major
,
1181 devices
[chosen_drive
].i
.disk
.minor
);
1182 if (ioctl(mdfd
, START_ARRAY
, dev
)) {
1183 fprintf(stderr
, Name
": Cannot start array: %s\n",
1193 int assemble_container_content(struct supertype
*st
, int mdfd
,
1194 struct mdinfo
*content
, int runstop
,
1195 char *chosen_name
, int verbose
)
1197 struct mdinfo
*dev
, *sra
;
1198 int working
= 0, preexist
= 0;
1199 struct map_ent
*map
= NULL
;
1201 sysfs_init(content
, mdfd
, 0);
1203 sra
= sysfs_read(mdfd
, 0, GET_VERSION
);
1204 if (sra
== NULL
|| strcmp(sra
->text_version
, content
->text_version
) != 0)
1205 if (sysfs_set_array(content
, md_get_version(mdfd
)) != 0)
1210 for (dev
= content
->devs
; dev
; dev
= dev
->next
)
1211 if (sysfs_add_disk(content
, dev
) == 0)
1213 else if (errno
== EEXIST
)
1216 /* Nothing new, don't try to start */ ;
1217 else if (runstop
> 0 ||
1218 (working
+ preexist
) >= content
->array
.working_disks
) {
1219 switch(content
->array
.level
) {
1221 case LEVEL_MULTIPATH
:
1223 sysfs_set_str(content
, NULL
, "array_state",
1227 sysfs_set_str(content
, NULL
, "array_state",
1229 /* start mdmon if needed. */
1230 if (!mdmon_running(st
->container_dev
))
1231 start_mdmon(st
->container_dev
);
1232 ping_monitor(devnum2devname(st
->container_dev
));
1235 sysfs_set_safemode(content
, content
->safe_mode_delay
);
1237 fprintf(stderr
, Name
1238 ": Started %s with %d devices",
1239 chosen_name
, working
+ preexist
);
1241 fprintf(stderr
, " (%d new)", working
);
1242 fprintf(stderr
, "\n");
1244 /* FIXME should have an O_EXCL and wait for read-auto */
1247 fprintf(stderr
, Name
1248 ": %s assembled with %d devices but "
1250 chosen_name
, working
);
1251 map_update(&map
, fd2devnum(mdfd
),
1252 content
->text_version
,
1253 content
->uuid
, chosen_name
);