]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Assemble.c
e421f22d2eddd0ddfd0e307b95fdb27a08e98e58
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
);
143 int vers
= vers
; /* Keep gcc quite - it really is initialised */
146 int uptodate
; /* set once we decide that this device is as
147 * recent as everything else in the array.
151 int *best
= NULL
; /* indexed by raid_disk */
152 unsigned int bestcnt
= 0;
154 unsigned int okcnt
, sparecnt
;
155 unsigned int req_cnt
;
161 int report_missmatch
;
163 int start_partial_ok
= (runstop
>= 0) &&
164 (force
|| devlist
==NULL
|| auto_assem
);
165 unsigned int num_devs
;
168 struct mdinfo
*content
= NULL
;
169 mdu_array_info_t tmp_inf
;
174 char chosen_name
[1024];
176 if (get_linux_version() < 2004000)
180 * If any subdevs are listed, then any that don't
181 * match ident are discarded. Remainder must all match and
183 * If no subdevs, then we scan all devices in the config file, but
184 * there must be something in the identity
188 ident
->uuid_set
== 0 &&
189 ident
->super_minor
< 0 &&
190 ident
->devices
== NULL
) {
191 fprintf(stderr
, Name
": No identity information available for %s - cannot assemble.\n",
192 mddev
? mddev
: "further assembly");
197 devlist
= conf_get_devs();
201 report_missmatch
= ((inargv
&& verbose
>= 0) || verbose
> 0);
203 /* We come back here when doing auto-assembly and attempting some
204 * set of devices failed. Those are now marked as ->used==2 and
205 * we ignore them and try again
208 tmpdev
= devlist
; num_devs
= 0;
214 tmpdev
= tmpdev
->next
;
216 devices
= malloc(num_devs
* sizeof(*devices
));
218 if (!st
&& ident
->st
) st
= ident
->st
;
221 fprintf(stderr
, Name
": looking for devices for %s\n",
222 mddev
? mddev
: "further assembly");
224 /* first walk the list of devices to find a consistent set
225 * that match the criterea, if that is possible.
226 * We flag the ones we like with 'used'.
228 for (tmpdev
= devlist
;
230 tmpdev
= tmpdev
->next
) {
231 char *devname
= tmpdev
->devname
;
234 struct supertype
*tst
= dup_super(st
);
236 if (tmpdev
->used
> 1) continue;
238 if (ident
->devices
&&
239 !match_oneof(ident
->devices
, devname
)) {
240 if (report_missmatch
)
241 fprintf(stderr
, Name
": %s is not one of %s\n", devname
, ident
->devices
);
245 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
247 if (report_missmatch
)
248 fprintf(stderr
, Name
": cannot open device %s: %s\n",
249 devname
, strerror(errno
));
251 } else if (fstat(dfd
, &stb
)< 0) {
253 fprintf(stderr
, Name
": fstat failed for %s: %s\n",
254 devname
, strerror(errno
));
256 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
257 fprintf(stderr
, Name
": %s is not a block device.\n",
260 } else if (!tst
&& (tst
= guess_super(dfd
)) == NULL
) {
261 if (report_missmatch
)
262 fprintf(stderr
, Name
": no recogniseable superblock on %s\n",
265 } else if (tst
->ss
->load_super(tst
,dfd
, NULL
)) {
266 if (report_missmatch
)
267 fprintf( stderr
, Name
": no RAID superblock on %s\n",
271 memset(content
, 0, sizeof(*content
));
272 tst
->ss
->getinfo_super(tst
, content
);
274 if (dfd
>= 0) close(dfd
);
276 if (tst
&& tst
->sb
&& tst
->ss
->container_content
277 && tst
->loaded_container
) {
278 /* tmpdev is a container. We need to be either
279 * looking for a member, or auto-assembling
282 /* already found some components, this cannot
285 if (report_missmatch
)
286 fprintf(stderr
, Name
": %s is a container, but we are looking for components\n",
291 if (ident
->container
) {
292 if (ident
->container
[0] == '/' &&
293 !same_dev(ident
->container
, devname
)) {
294 if (report_missmatch
)
295 fprintf(stderr
, Name
": %s is not the container required (%s)\n",
296 devname
, ident
->container
);
299 if (ident
->container
[0] != '/') {
302 if (!parse_uuid(ident
->container
, uuid
) ||
303 !same_uuid(content
->uuid
, uuid
, tst
->ss
->swapuuid
)) {
304 if (report_missmatch
)
305 fprintf(stderr
, Name
": %s has wrong UUID to be required container\n",
311 /* It is worth looking inside this container.
315 content
= tmpdev
->content
;
317 content
= tst
->ss
->container_content(tst
);
319 tmpdev
->content
= content
->next
;
320 if (tmpdev
->content
== NULL
)
323 } else if (ident
->container
|| ident
->member
) {
324 /* No chance of this matching if we don't have
326 if (report_missmatch
)
327 fprintf(stderr
, Name
"%s is not a container, and one is required.\n",
332 if (ident
->uuid_set
&& (!update
|| strcmp(update
, "uuid")!= 0) &&
334 same_uuid(content
->uuid
, ident
->uuid
, tst
->ss
->swapuuid
)==0)) {
335 if (report_missmatch
)
336 fprintf(stderr
, Name
": %s has wrong uuid.\n",
340 if (ident
->name
[0] && (!update
|| strcmp(update
, "name")!= 0) &&
342 name_matches(content
->name
, ident
->name
, homehost
)==0)) {
343 if (report_missmatch
)
344 fprintf(stderr
, Name
": %s has wrong name.\n",
348 if (ident
->super_minor
!= UnSet
&&
350 ident
->super_minor
!= content
->array
.md_minor
)) {
351 if (report_missmatch
)
352 fprintf(stderr
, Name
": %s has wrong super-minor.\n",
356 if (ident
->level
!= UnSet
&&
358 ident
->level
!= content
->array
.level
)) {
359 if (report_missmatch
)
360 fprintf(stderr
, Name
": %s has wrong raid level.\n",
364 if (ident
->raid_disks
!= UnSet
&&
366 ident
->raid_disks
!= content
->array
.raid_disks
)) {
367 if (report_missmatch
)
368 fprintf(stderr
, Name
": %s requires wrong number of drives.\n",
373 if (tst
== NULL
|| tst
->sb
== NULL
)
376 /* If we are this far, then we are nearly commited to this device.
377 * If the super_block doesn't exist, or doesn't match others,
378 * then we probably cannot continue
379 * However if one of the arrays is for the homehost, and
380 * the other isn't that can disambiguate.
383 if (!tst
|| !tst
->sb
) {
384 fprintf(stderr
, Name
": %s has no superblock - assembly aborted\n",
387 st
->ss
->free_super(st
);
391 if (tst
&& tst
->sb
&& tst
->ss
->container_content
392 && tst
->loaded_container
) {
393 /* we have the one container we need, don't keep
394 * looking. If the chosen member is active, skip.
396 if (is_member_busy(content
->text_version
)) {
399 fprintf(stderr
, Name
": member %s in %s is already assembled\n",
400 content
->text_version
,
402 tst
->ss
->free_super(tst
);
405 st
= tst
; tst
= NULL
;
406 if (!auto_assem
&& tmpdev
->next
!= NULL
) {
407 fprintf(stderr
, Name
": %s is a container, but is not "
408 "only device given: confused and aborting\n",
410 st
->ss
->free_super(st
);
417 if (st
->minor_version
== -1)
418 st
->minor_version
= tst
->minor_version
;
419 if (st
->ss
!= tst
->ss
||
420 st
->minor_version
!= tst
->minor_version
||
421 st
->ss
->compare_super(st
, tst
) != 0) {
422 /* Some mismatch. If exactly one array matches this host,
423 * we can resolve on that one.
424 * Or, if we are auto assembling, we just ignore the second
430 int first
= st
->ss
->match_home(st
, homehost
);
431 int last
= tst
->ss
->match_home(tst
, homehost
);
433 (first
== 1 || last
== 1)) {
434 /* We can do something */
435 if (first
) {/* just ignore this one */
436 if (report_missmatch
)
437 fprintf(stderr
, Name
": %s misses out due to wrong homehost\n",
440 } else { /* reject all those sofar */
442 if (report_missmatch
)
443 fprintf(stderr
, Name
": %s overrides previous devices due to good homehost\n",
445 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
453 fprintf(stderr
, Name
": superblock on %s doesn't match others - assembly aborted\n",
455 tst
->ss
->free_super(tst
);
456 st
->ss
->free_super(st
);
466 tst
->ss
->free_super(tst
);
469 if (!st
|| !st
->sb
|| !content
)
472 /* Now need to open array the device. Use create_mddev */
473 if (content
== &info
)
474 st
->ss
->getinfo_super(st
, content
);
476 trustworthy
= FOREIGN
;
477 switch (st
->ss
->match_home(st
, homehost
)) {
479 trustworthy
= FOREIGN
;
480 name
= content
->name
;
484 name
= strchr(content
->name
, ':');
488 name
= content
->name
;
491 trustworthy
= FOREIGN
;
494 if (!auto_assem
&& trustworthy
== FOREIGN
)
495 /* If the array is listed in mdadm or on
496 * command line, then we trust the name
497 * even if the array doesn't look local
501 if (content
->name
[0] == 0 &&
502 content
->array
.level
== LEVEL_CONTAINER
) {
503 name
= content
->text_version
;
504 trustworthy
= METADATA
;
506 mdfd
= create_mddev(mddev
, name
, ident
->autof
, trustworthy
,
509 st
->ss
->free_super(st
);
516 vers
= md_get_version(mdfd
);
518 fprintf(stderr
, Name
": Assemble requires driver version 0.90.0 or later.\n"
519 " Upgrade your kernel or try --build\n");
523 if (ioctl(mdfd
, GET_ARRAY_INFO
, &tmp_inf
)==0) {
524 fprintf(stderr
, Name
": %s already active, cannot restart it!\n",
526 for (tmpdev
= devlist
;
527 tmpdev
&& tmpdev
->used
!= 1;
528 tmpdev
= tmpdev
->next
)
530 if (tmpdev
&& auto_assem
)
531 fprintf(stderr
, Name
": %s needed for %s...\n",
532 mddev
, tmpdev
->devname
);
535 st
->ss
->free_super(st
);
541 ioctl(mdfd
, STOP_ARRAY
, NULL
); /* just incase it was started but has no content */
544 if (content
!= &info
) {
545 /* This is a member of a container. Try starting the array. */
546 return assemble_container_content(st
, mdfd
, content
, runstop
,
547 chosen_name
, verbose
);
550 /* Ok, no bad inconsistancy, we can try updating etc */
552 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) if (tmpdev
->used
== 1) {
553 char *devname
= tmpdev
->devname
;
555 /* looks like a good enough match to update the super block if needed */
559 /* prepare useful information in info structures */
561 struct supertype
*tst
;
564 if (strcmp(update
, "uuid")==0 &&
567 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
568 read(rfd
, ident
->uuid
, 16) != 16) {
569 *(__u32
*)(ident
->uuid
) = random();
570 *(__u32
*)(ident
->uuid
+1) = random();
571 *(__u32
*)(ident
->uuid
+2) = random();
572 *(__u32
*)(ident
->uuid
+3) = random();
574 if (rfd
>= 0) close(rfd
);
576 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
578 remove_partitions(dfd
);
581 tst
->ss
->load_super(tst
, dfd
, NULL
);
582 tst
->ss
->getinfo_super(tst
, content
);
584 memcpy(content
->uuid
, ident
->uuid
, 16);
585 strcpy(content
->name
, ident
->name
);
586 content
->array
.md_minor
= minor(stb2
.st_rdev
);
588 tst
->ss
->update_super(tst
, content
, update
,
590 ident
->uuid_set
, homehost
);
591 if (strcmp(update
, "uuid")==0 &&
594 memcpy(ident
->uuid
, content
->uuid
, 16);
597 fprintf(stderr
, Name
": Cannot open %s for superblock update\n",
599 else if (tst
->ss
->store_super(tst
, dfd
))
600 fprintf(stderr
, Name
": Could not re-write superblock on %s.\n",
605 if (strcmp(update
, "uuid")==0 &&
606 ident
->bitmap_fd
>= 0 && !bitmap_done
) {
607 if (bitmap_update_uuid(ident
->bitmap_fd
,
609 tst
->ss
->swapuuid
) != 0)
610 fprintf(stderr
, Name
": Could not update uuid on external bitmap.\n");
614 tst
->ss
->free_super(tst
);
618 struct supertype
*tst
= dup_super(st
);
620 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
622 remove_partitions(dfd
);
624 tst
->ss
->load_super(tst
, dfd
, NULL
);
625 tst
->ss
->getinfo_super(tst
, content
);
626 tst
->ss
->free_super(tst
);
633 fprintf(stderr
, Name
": %s is identified as a member of %s, slot %d.\n",
634 devname
, mddev
, content
->disk
.raid_disk
);
635 devices
[devcnt
].devname
= devname
;
636 devices
[devcnt
].uptodate
= 0;
637 devices
[devcnt
].i
= *content
;
638 devices
[devcnt
].i
.disk
.major
= major(stb
.st_rdev
);
639 devices
[devcnt
].i
.disk
.minor
= minor(stb
.st_rdev
);
640 if (most_recent
< devcnt
) {
641 if (devices
[devcnt
].i
.events
642 > devices
[most_recent
].i
.events
)
643 most_recent
= devcnt
;
645 if (content
->array
.level
== -4)
646 /* with multipath, the raid_disk from the superblock is meaningless */
649 i
= devices
[devcnt
].i
.disk
.raid_disk
;
651 if (nextspare
< content
->array
.raid_disks
)
652 nextspare
= content
->array
.raid_disks
;
655 if (i
>= content
->array
.raid_disks
&&
661 unsigned int newbestcnt
= i
+10;
662 int *newbest
= malloc(sizeof(int)*newbestcnt
);
664 for (c
=0; c
< newbestcnt
; c
++)
666 newbest
[c
] = best
[c
];
671 bestcnt
= newbestcnt
;
674 devices
[best
[i
]].i
.events
675 == devices
[devcnt
].i
.events
676 && (devices
[best
[i
]].i
.disk
.minor
677 != devices
[devcnt
].i
.disk
.minor
)
679 && content
->array
.level
!= LEVEL_MULTIPATH
) {
680 /* two different devices with identical superblock.
681 * Could be a mis-detection caused by overlapping
682 * partitions. fail-safe.
684 fprintf(stderr
, Name
": WARNING %s and %s appear"
685 " to have very similar superblocks.\n"
686 " If they are really different, "
687 "please --zero the superblock on one\n"
688 " If they are the same or overlap,"
689 " please remove one from %s.\n",
690 devices
[best
[i
]].devname
, devname
,
691 inargv
? "the list" :
692 "the\n DEVICE list in mdadm.conf"
698 || (devices
[best
[i
]].i
.events
699 < devices
[devcnt
].i
.events
))
706 fprintf(stderr
, Name
": no devices found for %s\n",
709 st
->ss
->free_super(st
);
714 if (update
&& strcmp(update
, "byteorder")==0)
715 st
->minor_version
= 90;
717 st
->ss
->getinfo_super(st
, content
);
718 clean
= content
->array
.state
& 1;
720 /* now we have some devices that might be suitable.
723 avail
= malloc(content
->array
.raid_disks
);
724 memset(avail
, 0, content
->array
.raid_disks
);
727 for (i
=0; i
< bestcnt
;i
++) {
729 int event_margin
= 1; /* always allow a difference of '1'
730 * like the kernel does
733 /* note: we ignore error flags in multipath arrays
734 * as they don't make sense
736 if (content
->array
.level
!= -4)
737 if (!(devices
[j
].i
.disk
.state
& (1<<MD_DISK_SYNC
))) {
738 if (!(devices
[j
].i
.disk
.state
739 & (1<<MD_DISK_FAULTY
)))
743 if (devices
[j
].i
.events
+event_margin
>=
744 devices
[most_recent
].i
.events
) {
745 devices
[j
].uptodate
= 1;
746 if (i
< content
->array
.raid_disks
) {
753 while (force
&& !enough(content
->array
.level
, content
->array
.raid_disks
,
754 content
->array
.layout
, 1,
756 /* Choose the newest best drive which is
757 * not up-to-date, update the superblock
761 struct supertype
*tst
;
762 long long current_events
;
764 for (i
=0; i
<content
->array
.raid_disks
&& i
< bestcnt
; i
++) {
767 !devices
[j
].uptodate
&&
768 devices
[j
].i
.events
> 0 &&
771 > devices
[chosen_drive
].i
.events
))
774 if (chosen_drive
< 0)
776 current_events
= devices
[chosen_drive
].i
.events
;
779 fprintf(stderr
, Name
": forcing event count in %s(%d) from %d upto %d\n",
780 devices
[chosen_drive
].devname
,
781 devices
[chosen_drive
].i
.disk
.raid_disk
,
782 (int)(devices
[chosen_drive
].i
.events
),
783 (int)(devices
[most_recent
].i
.events
));
784 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
786 fprintf(stderr
, Name
": Couldn't open %s for write - not updating\n",
787 devices
[chosen_drive
].devname
);
788 devices
[chosen_drive
].i
.events
= 0;
792 if (tst
->ss
->load_super(tst
,fd
, NULL
)) {
794 fprintf(stderr
, Name
": RAID superblock disappeared from %s - not updating.\n",
795 devices
[chosen_drive
].devname
);
796 devices
[chosen_drive
].i
.events
= 0;
799 content
->events
= devices
[most_recent
].i
.events
;
800 tst
->ss
->update_super(tst
, content
, "force-one",
801 devices
[chosen_drive
].devname
, verbose
,
804 if (tst
->ss
->store_super(tst
, fd
)) {
806 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
807 devices
[chosen_drive
].devname
);
808 devices
[chosen_drive
].i
.events
= 0;
809 tst
->ss
->free_super(tst
);
813 devices
[chosen_drive
].i
.events
= devices
[most_recent
].i
.events
;
814 devices
[chosen_drive
].uptodate
= 1;
815 avail
[chosen_drive
] = 1;
817 tst
->ss
->free_super(tst
);
819 /* If there are any other drives of the same vintage,
820 * add them in as well. We can't lose and we might gain
822 for (i
=0; i
<content
->array
.raid_disks
&& i
< bestcnt
; i
++) {
825 !devices
[j
].uptodate
&&
826 devices
[j
].i
.events
> 0 &&
827 devices
[j
].i
.events
== current_events
) {
834 /* Now we want to look at the superblock which the kernel will base things on
835 * and compare the devices that we think are working with the devices that the
836 * superblock thinks are working.
837 * If there are differences and --force is given, then update this chosen
841 st
->ss
->free_super(st
);
842 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
++) {
848 if (!devices
[j
].uptodate
)
851 if ((fd
=dev_open(devices
[j
].devname
, O_RDONLY
|O_EXCL
))< 0) {
852 fprintf(stderr
, Name
": Cannot open %s: %s\n",
853 devices
[j
].devname
, strerror(errno
));
857 if (st
->ss
->load_super(st
,fd
, NULL
)) {
859 fprintf(stderr
, Name
": RAID superblock has disappeared from %s\n",
866 if (st
->sb
== NULL
) {
867 fprintf(stderr
, Name
": No suitable drives found for %s\n", mddev
);
871 st
->ss
->getinfo_super(st
, content
);
873 sysfs_init(content
, mdfd
, 0);
875 for (i
=0; i
<bestcnt
; i
++) {
877 unsigned int desired_state
;
879 if (i
< content
->array
.raid_disks
)
880 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
886 if (!devices
[j
].uptodate
)
889 devices
[j
].i
.disk
.state
= desired_state
;
891 if (st
->ss
->update_super(st
, &devices
[j
].i
, "assemble", NULL
,
895 fprintf(stderr
, Name
": "
896 "clearing FAULTY flag for device %d in %s for %s\n",
897 j
, mddev
, devices
[j
].devname
);
901 fprintf(stderr
, Name
": "
902 "device %d in %s has wrong state in superblock, but %s seems ok\n",
903 i
, mddev
, devices
[j
].devname
);
907 if (!(super
.disks
[i
].i
.disk
.state
& (1 << MD_DISK_FAULTY
))) {
908 fprintf(stderr
, Name
": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
913 if (force
&& !clean
&&
914 !enough(content
->array
.level
, content
->array
.raid_disks
,
915 content
->array
.layout
, clean
,
917 change
+= st
->ss
->update_super(st
, content
, "force-array",
918 devices
[chosen_drive
].devname
, verbose
,
925 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
927 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
928 devices
[chosen_drive
].devname
);
932 if (st
->ss
->store_super(st
, fd
)) {
934 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
935 devices
[chosen_drive
].devname
);
942 /* If we are in the middle of a reshape we may need to restore saved data
943 * that was moved aside due to the reshape overwriting live data
944 * The code of doing this lives in Grow.c
947 if (content
->reshape_active
) {
949 int *fdlist
= malloc(sizeof(int)* bestcnt
);
950 for (i
=0; i
<bestcnt
; i
++) {
953 fdlist
[i
] = dev_open(devices
[j
].devname
, O_RDWR
|O_EXCL
);
955 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
964 err
= Grow_restart(st
, content
, fdlist
, bestcnt
, backup_file
);
967 if (fdlist
[i
]>=0) close(fdlist
[i
]);
970 fprintf(stderr
, Name
": Failed to restore critical section for reshape, sorry.\n");
976 /* count number of in-sync devices according to the superblock.
977 * We must have this number to start the array without -s or -R
979 req_cnt
= content
->array
.working_disks
;
981 /* Almost ready to actually *do* something */
985 /* First, fill in the map, so that udev can find our name
986 * as soon as we become active.
988 map_update(NULL
, fd2devnum(mdfd
), content
->text_version
,
989 content
->uuid
, chosen_name
);
991 rv
= set_array_info(mdfd
, st
, content
);
993 fprintf(stderr
, Name
": failed to set array info for %s: %s\n",
994 mddev
, strerror(errno
));
998 if (ident
->bitmap_fd
>= 0) {
999 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
1000 fprintf(stderr
, Name
": SET_BITMAP_FILE failed.\n");
1004 } else if (ident
->bitmap_file
) {
1005 /* From config file */
1006 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
1008 fprintf(stderr
, Name
": Could not open bitmap file %s\n",
1009 ident
->bitmap_file
);
1013 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
1014 fprintf(stderr
, Name
": Failed to set bitmapfile for %s\n", mddev
);
1022 /* First, add the raid disks, but add the chosen one last */
1023 for (i
=0; i
<= bestcnt
; i
++) {
1027 if (j
== chosen_drive
)
1032 if (j
>= 0 /* && devices[j].uptodate */) {
1033 rv
= add_disk(mdfd
, st
, content
, &devices
[j
].i
);
1036 fprintf(stderr
, Name
": failed to add "
1041 if (i
< content
->array
.raid_disks
1046 } else if (verbose
> 0)
1047 fprintf(stderr
, Name
": added %s "
1049 devices
[j
].devname
, mddev
,
1050 devices
[j
].i
.disk
.raid_disk
);
1051 } else if (verbose
> 0 && i
< content
->array
.raid_disks
)
1052 fprintf(stderr
, Name
": no uptodate device for "
1057 if (content
->array
.level
== LEVEL_CONTAINER
) {
1059 fprintf(stderr
, Name
": Container %s has been "
1060 "assembled with %d drive%s",
1061 mddev
, okcnt
+sparecnt
, okcnt
+sparecnt
==1?"":"s");
1062 if (okcnt
< content
->array
.raid_disks
)
1063 fprintf(stderr
, " (out of %d)",
1064 content
->array
.raid_disks
);
1065 fprintf(stderr
, "\n");
1067 sysfs_uevent(content
, "change");
1074 ( enough(content
->array
.level
, content
->array
.raid_disks
,
1075 content
->array
.layout
, clean
, avail
, okcnt
) &&
1076 (okcnt
>= req_cnt
|| start_partial_ok
)
1078 if (ioctl(mdfd
, RUN_ARRAY
, NULL
)==0) {
1080 fprintf(stderr
, Name
": %s has been started with %d drive%s",
1081 mddev
, okcnt
, okcnt
==1?"":"s");
1082 if (okcnt
< content
->array
.raid_disks
)
1083 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
1085 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1086 fprintf(stderr
, ".\n");
1091 /* There is a nasty race with 'mdadm --monitor'.
1092 * If it opens this device before we close it,
1093 * it gets an incomplete open on which IO
1094 * doesn't work and the capacity is
1096 * If we reopen (to check for layered devices)
1097 * before --monitor closes, we loose.
1099 * So: wait upto 1 second for there to be
1100 * a non-zero capacity.
1102 while (usecs
< 1000) {
1103 mdfd
= open(mddev
, O_RDONLY
);
1105 unsigned long long size
;
1106 if (get_dev_size(mdfd
, NULL
, &size
) &&
1117 fprintf(stderr
, Name
": failed to RUN_ARRAY %s: %s\n",
1118 mddev
, strerror(errno
));
1120 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1121 content
->array
.layout
, 1, avail
, okcnt
))
1122 fprintf(stderr
, Name
": Not enough devices to "
1123 "start the array.\n");
1124 else if (!enough(content
->array
.level
,
1125 content
->array
.raid_disks
,
1126 content
->array
.layout
, clean
,
1128 fprintf(stderr
, Name
": Not enough devices to "
1129 "start the array while not clean "
1130 "- consider --force.\n");
1133 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1137 if (runstop
== -1) {
1138 fprintf(stderr
, Name
": %s assembled from %d drive%s",
1139 mddev
, okcnt
, okcnt
==1?"":"s");
1140 if (okcnt
!= content
->array
.raid_disks
)
1141 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
1142 fprintf(stderr
, ", but not started.\n");
1146 if (verbose
>= -1) {
1147 fprintf(stderr
, Name
": %s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
1149 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1150 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1151 content
->array
.layout
, 1, avail
, okcnt
))
1152 fprintf(stderr
, " - not enough to start the array.\n");
1153 else if (!enough(content
->array
.level
,
1154 content
->array
.raid_disks
,
1155 content
->array
.layout
, clean
,
1157 fprintf(stderr
, " - not enough to start the "
1158 "array while not clean - consider "
1161 if (req_cnt
== content
->array
.raid_disks
)
1162 fprintf(stderr
, " - need all %d to start it", req_cnt
);
1164 fprintf(stderr
, " - need %d of %d to start", req_cnt
, content
->array
.raid_disks
);
1165 fprintf(stderr
, " (use --run to insist).\n");
1169 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1172 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1173 * been updated to point to the current locations of devices.
1174 * so we can just start the array
1177 dev
= makedev(devices
[chosen_drive
].i
.disk
.major
,
1178 devices
[chosen_drive
].i
.disk
.minor
);
1179 if (ioctl(mdfd
, START_ARRAY
, dev
)) {
1180 fprintf(stderr
, Name
": Cannot start array: %s\n",
1190 int assemble_container_content(struct supertype
*st
, int mdfd
,
1191 struct mdinfo
*content
, int runstop
,
1192 char *chosen_name
, int verbose
)
1194 struct mdinfo
*dev
, *sra
;
1195 int working
= 0, preexist
= 0;
1196 struct map_ent
*map
= NULL
;
1198 sysfs_init(content
, mdfd
, 0);
1200 sra
= sysfs_read(mdfd
, 0, GET_VERSION
);
1201 if (sra
== NULL
|| strcmp(sra
->text_version
, content
->text_version
) != 0)
1202 if (sysfs_set_array(content
, md_get_version(mdfd
)) != 0)
1207 for (dev
= content
->devs
; dev
; dev
= dev
->next
)
1208 if (sysfs_add_disk(content
, dev
) == 0)
1210 else if (errno
== EEXIST
)
1213 /* Nothing new, don't try to start */ ;
1214 else if (runstop
> 0 ||
1215 (working
+ preexist
) >= content
->array
.working_disks
) {
1216 switch(content
->array
.level
) {
1218 case LEVEL_MULTIPATH
:
1220 sysfs_set_str(content
, NULL
, "array_state",
1224 sysfs_set_str(content
, NULL
, "array_state",
1226 /* start mdmon if needed. */
1227 if (!mdmon_running(st
->container_dev
))
1228 start_mdmon(st
->container_dev
);
1229 ping_monitor(devnum2devname(st
->container_dev
));
1232 sysfs_set_safemode(content
, content
->safe_mode_delay
);
1234 fprintf(stderr
, Name
1235 ": Started %s with %d devices",
1236 chosen_name
, working
+ preexist
);
1238 fprintf(stderr
, " (%d new)", working
);
1239 fprintf(stderr
, "\n");
1241 /* FIXME should have an O_EXCL and wait for read-auto */
1244 fprintf(stderr
, Name
1245 ": %s assembled with %d devices but "
1247 chosen_name
, working
);
1248 map_update(&map
, fd2devnum(mdfd
),
1249 content
->text_version
,
1250 content
->uuid
, chosen_name
);