]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Assemble.c
fa534fd263c6de09a5f3900795beba064ad6017e
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 int Assemble(struct supertype
*st
, char *mddev
, int mdfd
,
55 mddev_dev_t devlist
, char *backup_file
,
56 int readonly
, int runstop
,
57 char *update
, char *homehost
,
58 int verbose
, int force
)
61 * The task of Assemble is to find a collection of
62 * devices that should (according to their superblocks)
63 * form an array, and to give this collection to the MD driver.
64 * In Linux-2.4 and later, this involves submitting a
65 * SET_ARRAY_INFO ioctl with no arg - to prepare
66 * the array - and then submit a number of
67 * ADD_NEW_DISK ioctls to add disks into
68 * the array. Finally RUN_ARRAY might
69 * be submitted to start the array.
71 * Much of the work of Assemble is in finding and/or
72 * checking the disks to make sure they look right.
74 * If mddev is not set, then scan must be set and we
75 * read through the config file for dev+uuid mapping
76 * We recurse, setting mddev, for each device that
78 * - has a valid uuid (or any uuid if !uuidset)
80 * If mddev is set, we try to determine state of md.
81 * check version - must be at least 0.90.0
82 * check kernel version. must be at least 2.4.
83 * If not, we can possibly fall back on START_ARRAY
84 * Try to GET_ARRAY_INFO.
85 * If possible, give up
86 * If not, try to STOP_ARRAY just to make sure
88 * If !uuidset and scan, look in conf-file for uuid
89 * If not found, give up
90 * If !devlist and scan and uuidset, get list of devs from conf-file
93 * Check superblock - discard if bad
94 * Check uuid (set if we don't have one) - discard if no match
95 * Check superblock similarity if we have a superblock - discard if different
96 * Record events, devicenum
97 * This should give us a list of devices for the array
98 * We should collect the most recent event number
100 * Count disks with recent enough event count
101 * While force && !enough disks
102 * Choose newest rejected disks, update event count
103 * mark clean and rewrite superblock
106 * foreach device with recent events : ADD_NEW_DISK
107 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
109 * Check the device numbers in superblock are right
110 * update superblock if any changes
117 int vers
= 0; /* Keep gcc quite - it really is initialised */
120 int uptodate
; /* set once we decide that this device is as
121 * recent as everything else in the array.
125 int *best
= NULL
; /* indexed by raid_disk */
126 unsigned int bestcnt
= 0;
128 unsigned int okcnt
, sparecnt
;
129 unsigned int req_cnt
;
136 int start_partial_ok
= (runstop
>= 0) && (force
|| devlist
==NULL
|| mdfd
< 0);
137 unsigned int num_devs
;
142 int uuid_for_name
= 0;
144 memset(&info
, 0, sizeof(info
));
146 if (get_linux_version() < 2004000)
150 vers
= md_get_version(mdfd
);
152 fprintf(stderr
, Name
": %s appears not to be an md device.\n", mddev
);
156 fprintf(stderr
, Name
": Assemble requires driver version 0.90.0 or later.\n"
157 " Upgrade your kernel or try --build\n");
161 if (ioctl(mdfd
, GET_ARRAY_INFO
, &info
.array
)>=0) {
162 fprintf(stderr
, Name
": device %s already active - cannot assemble it\n",
166 ioctl(mdfd
, STOP_ARRAY
, NULL
); /* just incase it was started but has no content */
169 * If any subdevs are listed, then any that don't
170 * match ident are discarded. Remainder must all match and
172 * If no subdevs, then we scan all devices in the config file, but
173 * there must be something in the identity
177 ident
->uuid_set
== 0 &&
178 ident
->super_minor
< 0 &&
179 ident
->devices
== NULL
) {
180 fprintf(stderr
, Name
": No identity information available for %s - cannot assemble.\n",
181 mddev
? mddev
: "further assembly");
185 /* if the configuration specifies a container then we use that to
186 * determine the devices and retrieve the array configuration
189 if (ident
->container
&& ident
->member
) {
190 int cfd
= open(ident
->container
, O_RDWR
);
192 struct supertype container
;
195 fprintf(stderr
, Name
": looking to assemble member array %s"
196 " inside container %s\n", ident
->member
, ident
->container
);
199 fprintf(stderr
, Name
": unable to open container %s: %s\n",
200 ident
->container
, strerror(errno
));
204 mdi
= sysfs_read(cfd
, fd2devnum(cfd
), GET_VERSION
);
208 fprintf(stderr
, Name
": unable to read container %s\n",
212 container
.ss
= find_metadata_methods(mdi
->text_version
);
216 fprintf(stderr
, Name
": %s uses unknown metadata: %s\n",
217 ident
->container
, mdi
->text_version
);
220 if (container
.ss
->load_super(&container
, cfd
, ident
->container
)) {
221 fprintf(stderr
, Name
": Cannot load metadata for container %s\n",
226 return Incremental_container(&container
, ident
->container
,
227 verbose
, runstop
, ident
->autof
);
231 devlist
= conf_get_devs();
237 tmpdev
= devlist
; num_devs
= 0;
243 tmpdev
= tmpdev
->next
;
245 devices
= malloc(num_devs
* sizeof(*devices
));
247 if (!st
&& ident
->st
) st
= ident
->st
;
250 fprintf(stderr
, Name
": looking for devices for %s\n",
251 mddev
? mddev
: "further assembly");
253 /* first walk the list of devices to find a consistent set
254 * that match the criterea, if that is possible.
255 * We flag the one we like with 'used'.
257 for (tmpdev
= devlist
;
259 tmpdev
= tmpdev
->next
) {
260 char *devname
= tmpdev
->devname
;
263 struct supertype
*tst
= dup_super(st
);
265 if (tmpdev
->used
> 1) continue;
267 if (ident
->devices
&&
268 !match_oneof(ident
->devices
, devname
)) {
269 if ((inargv
&& verbose
>=0) || verbose
> 0)
270 fprintf(stderr
, Name
": %s is not one of %s\n", devname
, ident
->devices
);
274 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
276 if ((inargv
&& verbose
>= 0) || verbose
> 0)
277 fprintf(stderr
, Name
": cannot open device %s: %s\n",
278 devname
, strerror(errno
));
280 } else if (fstat(dfd
, &stb
)< 0) {
282 fprintf(stderr
, Name
": fstat failed for %s: %s\n",
283 devname
, strerror(errno
));
285 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
286 fprintf(stderr
, Name
": %s is not a block device.\n",
289 } else if (!tst
&& (tst
= guess_super(dfd
)) == NULL
) {
290 if ((inargv
&& verbose
>= 0) || verbose
> 0)
291 fprintf(stderr
, Name
": no recogniseable superblock on %s\n",
294 } else if (tst
->ss
->load_super(tst
,dfd
, NULL
)) {
295 if ((inargv
&& verbose
>= 0) || verbose
> 0)
296 fprintf( stderr
, Name
": no RAID superblock on %s\n",
299 tst
->ss
->getinfo_super(tst
, &info
);
301 if (dfd
>= 0) close(dfd
);
303 if (ident
->uuid_set
&& (!update
|| strcmp(update
, "uuid")!= 0) &&
305 same_uuid(info
.uuid
, ident
->uuid
, tst
->ss
->swapuuid
)==0)) {
306 if ((inargv
&& verbose
>= 0) || verbose
> 0)
307 fprintf(stderr
, Name
": %s has wrong uuid.\n",
311 if (ident
->name
[0] && (!update
|| strcmp(update
, "name")!= 0) &&
313 name_matches(info
.name
, ident
->name
, homehost
)==0)) {
314 if ((inargv
&& verbose
>= 0) || verbose
> 0)
315 fprintf(stderr
, Name
": %s has wrong name.\n",
319 if (ident
->super_minor
!= UnSet
&&
321 ident
->super_minor
!= info
.array
.md_minor
)) {
322 if ((inargv
&& verbose
>= 0) || verbose
> 0)
323 fprintf(stderr
, Name
": %s has wrong super-minor.\n",
327 if (ident
->level
!= UnSet
&&
329 ident
->level
!= info
.array
.level
)) {
330 if ((inargv
&& verbose
>= 0) || verbose
> 0)
331 fprintf(stderr
, Name
": %s has wrong raid level.\n",
335 if (ident
->raid_disks
!= UnSet
&&
337 ident
->raid_disks
!= info
.array
.raid_disks
)) {
338 if ((inargv
&& verbose
>= 0) || verbose
> 0)
339 fprintf(stderr
, Name
": %s requires wrong number of drives.\n",
344 if (tst
== NULL
|| tst
->sb
== NULL
)
346 switch(tst
->ss
->match_home(tst
, homehost
))
348 case 1: /* happy with match. */
350 case -1: /* cannot match */
353 case 0: /* Doesn't match */
355 /* We are changing the name*/
357 if ((inargv
&& verbose
>= 0) || verbose
> 0)
358 fprintf(stderr
, Name
": %s is not built for "
359 "host %s - using UUID for "
363 /* Auto-assemble, and this is not a usable host */
364 /* if update != NULL, we are updating the host
370 /* If we are this far, then we are nearly commited to this device.
371 * If the super_block doesn't exist, or doesn't match others,
372 * then we probably cannot continue
373 * However if one of the arrays is for the homehost, and
374 * the other isn't that can disambiguate.
377 if (!tst
|| !tst
->sb
) {
378 fprintf(stderr
, Name
": %s has no superblock - assembly aborted\n",
381 st
->ss
->free_super(st
);
387 if (st
->minor_version
== -1)
388 st
->minor_version
= tst
->minor_version
;
389 if (st
->ss
!= tst
->ss
||
390 st
->minor_version
!= tst
->minor_version
||
391 st
->ss
->compare_super(st
, tst
) != 0) {
392 /* Some mismatch. If exactly one array matches this host,
393 * we can resolve on that one.
394 * Or, if we are auto assembling, we just ignore the second
400 int first
= st
->ss
->match_home(st
, homehost
);
401 int last
= tst
->ss
->match_home(tst
, homehost
);
403 (first
== 1 || last
== 1)) {
404 /* We can do something */
405 if (first
) {/* just ignore this one */
406 if ((inargv
&& verbose
>= 0) || verbose
> 0)
407 fprintf(stderr
, Name
": %s misses out due to wrong homehost\n",
410 } else { /* reject all those sofar */
412 if ((inargv
&& verbose
>= 0) || verbose
> 0)
413 fprintf(stderr
, Name
": %s overrides previous devices due to good homehost\n",
415 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
423 fprintf(stderr
, Name
": superblock on %s doesn't match others - assembly aborted\n",
425 tst
->ss
->free_super(tst
);
426 st
->ss
->free_super(st
);
434 tst
->ss
->free_super(tst
);
438 /* So... it is up to me to open the device.
439 * We create a name '/dev/md/XXX' based on the info in the
440 * superblock, and call create_mddev on that
442 mdu_array_info_t inf
;
447 if (!st
|| !st
->sb
) {
450 st
->ss
->getinfo_super(st
, &info
);
452 c
= fname_from_uuid(st
, &info
, nbuf
, '-');
454 c
= strchr(info
.name
, ':');
455 if (c
) c
++; else c
= info
.name
;
457 if (isdigit(*c
) && ((ident
->autof
& 7)==4 || (ident
->autof
&7)==6))
458 /* /dev/md/d0 style for partitionable */
459 rc
= asprintf(&mddev
, "/dev/md/d%s", c
);
461 rc
= asprintf(&mddev
, "/dev/md/%s", c
);
465 mdfd
= create_mddev(mddev
, ident
->autof
);
467 st
->ss
->free_super(st
);
471 vers
= md_get_version(mdfd
);
472 if (ioctl(mdfd
, GET_ARRAY_INFO
, &inf
)==0) {
473 for (tmpdev
= devlist
;
474 tmpdev
&& tmpdev
->used
!= 1;
475 tmpdev
= tmpdev
->next
)
477 fprintf(stderr
, Name
": %s already active, cannot restart it!\n", mddev
);
479 fprintf(stderr
, Name
": %s needed for %s...\n",
480 mddev
, tmpdev
->devname
);
483 st
->ss
->free_super(st
);
490 /* Ok, no bad inconsistancy, we can try updating etc */
492 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) if (tmpdev
->used
== 1) {
493 char *devname
= tmpdev
->devname
;
495 /* looks like a good enough match to update the super block if needed */
499 /* prepare useful information in info structures */
501 struct supertype
*tst
;
504 if (strcmp(update
, "uuid")==0 &&
507 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
508 read(rfd
, ident
->uuid
, 16) != 16) {
509 *(__u32
*)(ident
->uuid
) = random();
510 *(__u32
*)(ident
->uuid
+1) = random();
511 *(__u32
*)(ident
->uuid
+2) = random();
512 *(__u32
*)(ident
->uuid
+3) = random();
514 if (rfd
>= 0) close(rfd
);
516 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
518 remove_partitions(dfd
);
521 tst
->ss
->load_super(tst
, dfd
, NULL
);
522 tst
->ss
->getinfo_super(tst
, &info
);
524 memcpy(info
.uuid
, ident
->uuid
, 16);
525 strcpy(info
.name
, ident
->name
);
526 info
.array
.md_minor
= minor(stb2
.st_rdev
);
528 tst
->ss
->update_super(tst
, &info
, update
,
530 ident
->uuid_set
, homehost
);
531 if (strcmp(update
, "uuid")==0 &&
534 memcpy(ident
->uuid
, info
.uuid
, 16);
537 fprintf(stderr
, Name
": Cannot open %s for superblock update\n",
539 else if (tst
->ss
->store_super(tst
, dfd
))
540 fprintf(stderr
, Name
": Could not re-write superblock on %s.\n",
545 if (strcmp(update
, "uuid")==0 &&
546 ident
->bitmap_fd
>= 0 && !bitmap_done
) {
547 if (bitmap_update_uuid(ident
->bitmap_fd
,
549 tst
->ss
->swapuuid
) != 0)
550 fprintf(stderr
, Name
": Could not update uuid on external bitmap.\n");
554 tst
->ss
->free_super(tst
);
558 struct supertype
*tst
= dup_super(st
);
560 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
562 remove_partitions(dfd
);
564 tst
->ss
->load_super(tst
, dfd
, NULL
);
565 tst
->ss
->getinfo_super(tst
, &info
);
566 tst
->ss
->free_super(tst
);
573 fprintf(stderr
, Name
": %s is identified as a member of %s, slot %d.\n",
574 devname
, mddev
, info
.disk
.raid_disk
);
575 devices
[devcnt
].devname
= devname
;
576 devices
[devcnt
].uptodate
= 0;
577 devices
[devcnt
].i
= info
;
578 devices
[devcnt
].i
.disk
.major
= major(stb
.st_rdev
);
579 devices
[devcnt
].i
.disk
.minor
= minor(stb
.st_rdev
);
580 if (most_recent
< devcnt
) {
581 if (devices
[devcnt
].i
.events
582 > devices
[most_recent
].i
.events
)
583 most_recent
= devcnt
;
585 if (info
.array
.level
== -4)
586 /* with multipath, the raid_disk from the superblock is meaningless */
589 i
= devices
[devcnt
].i
.disk
.raid_disk
;
591 if (nextspare
< info
.array
.raid_disks
)
592 nextspare
= info
.array
.raid_disks
;
595 if (i
>= info
.array
.raid_disks
&&
601 unsigned int newbestcnt
= i
+10;
602 int *newbest
= malloc(sizeof(int)*newbestcnt
);
604 for (c
=0; c
< newbestcnt
; c
++)
606 newbest
[c
] = best
[c
];
611 bestcnt
= newbestcnt
;
614 devices
[best
[i
]].i
.events
615 == devices
[devcnt
].i
.events
616 && (devices
[best
[i
]].i
.disk
.minor
617 != devices
[devcnt
].i
.disk
.minor
)
619 && info
.array
.level
!= LEVEL_MULTIPATH
) {
620 /* two different devices with identical superblock.
621 * Could be a mis-detection caused by overlapping
622 * partitions. fail-safe.
624 fprintf(stderr
, Name
": WARNING %s and %s appear"
625 " to have very similar superblocks.\n"
626 " If they are really different, "
627 "please --zero the superblock on one\n"
628 " If they are the same or overlap,"
629 " please remove one from %s.\n",
630 devices
[best
[i
]].devname
, devname
,
631 inargv
? "the list" :
632 "the\n DEVICE list in mdadm.conf"
634 if (must_close
) close(mdfd
);
638 || (devices
[best
[i
]].i
.events
639 < devices
[devcnt
].i
.events
))
646 fprintf(stderr
, Name
": no devices found for %s\n",
649 st
->ss
->free_super(st
);
650 if (must_close
) close(mdfd
);
654 if (update
&& strcmp(update
, "byteorder")==0)
655 st
->minor_version
= 90;
657 st
->ss
->getinfo_super(st
, &info
);
658 clean
= info
.array
.state
& 1;
660 /* now we have some devices that might be suitable.
663 avail
= malloc(info
.array
.raid_disks
);
664 memset(avail
, 0, info
.array
.raid_disks
);
667 for (i
=0; i
< bestcnt
;i
++) {
669 int event_margin
= 1; /* always allow a difference of '1'
670 * like the kernel does
673 /* note: we ignore error flags in multipath arrays
674 * as they don't make sense
676 if (info
.array
.level
!= -4)
677 if (!(devices
[j
].i
.disk
.state
& (1<<MD_DISK_SYNC
))) {
678 if (!(devices
[j
].i
.disk
.state
679 & (1<<MD_DISK_FAULTY
)))
683 if (devices
[j
].i
.events
+event_margin
>=
684 devices
[most_recent
].i
.events
) {
685 devices
[j
].uptodate
= 1;
686 if (i
< info
.array
.raid_disks
) {
693 while (force
&& !enough(info
.array
.level
, info
.array
.raid_disks
,
694 info
.array
.layout
, 1,
696 /* Choose the newest best drive which is
697 * not up-to-date, update the superblock
701 struct supertype
*tst
;
702 long long current_events
;
704 for (i
=0; i
<info
.array
.raid_disks
&& i
< bestcnt
; i
++) {
707 !devices
[j
].uptodate
&&
708 devices
[j
].i
.events
> 0 &&
711 > devices
[chosen_drive
].i
.events
))
714 if (chosen_drive
< 0)
716 current_events
= devices
[chosen_drive
].i
.events
;
719 fprintf(stderr
, Name
": forcing event count in %s(%d) from %d upto %d\n",
720 devices
[chosen_drive
].devname
,
721 devices
[chosen_drive
].i
.disk
.raid_disk
,
722 (int)(devices
[chosen_drive
].i
.events
),
723 (int)(devices
[most_recent
].i
.events
));
724 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
726 fprintf(stderr
, Name
": Couldn't open %s for write - not updating\n",
727 devices
[chosen_drive
].devname
);
728 devices
[chosen_drive
].i
.events
= 0;
732 if (tst
->ss
->load_super(tst
,fd
, NULL
)) {
734 fprintf(stderr
, Name
": RAID superblock disappeared from %s - not updating.\n",
735 devices
[chosen_drive
].devname
);
736 devices
[chosen_drive
].i
.events
= 0;
739 info
.events
= devices
[most_recent
].i
.events
;
740 tst
->ss
->update_super(tst
, &info
, "force-one",
741 devices
[chosen_drive
].devname
, verbose
,
744 if (tst
->ss
->store_super(tst
, fd
)) {
746 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
747 devices
[chosen_drive
].devname
);
748 devices
[chosen_drive
].i
.events
= 0;
749 tst
->ss
->free_super(tst
);
753 devices
[chosen_drive
].i
.events
= devices
[most_recent
].i
.events
;
754 devices
[chosen_drive
].uptodate
= 1;
755 avail
[chosen_drive
] = 1;
757 tst
->ss
->free_super(tst
);
759 /* If there are any other drives of the same vintage,
760 * add them in as well. We can't lose and we might gain
762 for (i
=0; i
<info
.array
.raid_disks
&& i
< bestcnt
; i
++) {
765 !devices
[j
].uptodate
&&
766 devices
[j
].i
.events
> 0 &&
767 devices
[j
].i
.events
== current_events
) {
774 /* Now we want to look at the superblock which the kernel will base things on
775 * and compare the devices that we think are working with the devices that the
776 * superblock thinks are working.
777 * If there are differences and --force is given, then update this chosen
781 st
->ss
->free_super(st
);
782 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
++) {
788 if (!devices
[j
].uptodate
)
791 if ((fd
=dev_open(devices
[j
].devname
, O_RDONLY
|O_EXCL
))< 0) {
792 fprintf(stderr
, Name
": Cannot open %s: %s\n",
793 devices
[j
].devname
, strerror(errno
));
794 if (must_close
) close(mdfd
);
797 if (st
->ss
->load_super(st
,fd
, NULL
)) {
799 fprintf(stderr
, Name
": RAID superblock has disappeared from %s\n",
801 if (must_close
) close(mdfd
);
806 if (st
->sb
== NULL
) {
807 fprintf(stderr
, Name
": No suitable drives found for %s\n", mddev
);
808 if (must_close
) close(mdfd
);
811 st
->ss
->getinfo_super(st
, &info
);
813 sysfs_init(&info
, mdfd
, 0);
815 for (i
=0; i
<bestcnt
; i
++) {
817 unsigned int desired_state
;
819 if (i
< info
.array
.raid_disks
)
820 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
826 if (!devices
[j
].uptodate
)
829 devices
[j
].i
.disk
.state
= desired_state
;
831 if (st
->ss
->update_super(st
, &devices
[j
].i
, "assemble", NULL
,
835 fprintf(stderr
, Name
": "
836 "clearing FAULTY flag for device %d in %s for %s\n",
837 j
, mddev
, devices
[j
].devname
);
841 fprintf(stderr
, Name
": "
842 "device %d in %s has wrong state in superblock, but %s seems ok\n",
843 i
, mddev
, devices
[j
].devname
);
847 if (!(super
.disks
[i
].i
.disk
.state
& (1 << MD_DISK_FAULTY
))) {
848 fprintf(stderr
, Name
": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
853 if (force
&& !clean
&&
854 !enough(info
.array
.level
, info
.array
.raid_disks
,
855 info
.array
.layout
, clean
,
857 change
+= st
->ss
->update_super(st
, &info
, "force-array",
858 devices
[chosen_drive
].devname
, verbose
,
865 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
867 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
868 devices
[chosen_drive
].devname
);
869 if (must_close
) close(mdfd
);
872 if (st
->ss
->store_super(st
, fd
)) {
874 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
875 devices
[chosen_drive
].devname
);
876 if (must_close
) close(mdfd
);
882 /* If we are in the middle of a reshape we may need to restore saved data
883 * that was moved aside due to the reshape overwriting live data
884 * The code of doing this lives in Grow.c
887 if (info
.reshape_active
) {
889 int *fdlist
= malloc(sizeof(int)* bestcnt
);
890 for (i
=0; i
<bestcnt
; i
++) {
893 fdlist
[i
] = dev_open(devices
[j
].devname
, O_RDWR
|O_EXCL
);
895 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
904 err
= Grow_restart(st
, &info
, fdlist
, bestcnt
, backup_file
);
907 if (fdlist
[i
]>=0) close(fdlist
[i
]);
910 fprintf(stderr
, Name
": Failed to restore critical section for reshape, sorry.\n");
911 if (must_close
) close(mdfd
);
916 /* count number of in-sync devices according to the superblock.
917 * We must have this number to start the array without -s or -R
919 req_cnt
= info
.array
.working_disks
;
921 /* Almost ready to actually *do* something */
925 rv
= set_array_info(mdfd
, st
, &info
);
927 fprintf(stderr
, Name
": failed to set array info for %s: %s\n",
928 mddev
, strerror(errno
));
929 if (must_close
) close(mdfd
);
932 if (ident
->bitmap_fd
>= 0) {
933 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
934 fprintf(stderr
, Name
": SET_BITMAP_FILE failed.\n");
935 if (must_close
) close(mdfd
);
938 } else if (ident
->bitmap_file
) {
939 /* From config file */
940 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
942 fprintf(stderr
, Name
": Could not open bitmap file %s\n",
944 if (must_close
) close(mdfd
);
947 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
948 fprintf(stderr
, Name
": Failed to set bitmapfile for %s\n", mddev
);
950 if (must_close
) close(mdfd
);
956 /* First, add the raid disks, but add the chosen one last */
957 for (i
=0; i
<= bestcnt
; i
++) {
961 if (j
== chosen_drive
)
966 if (j
>= 0 /* && devices[j].uptodate */) {
967 rv
= add_disk(mdfd
, st
, &info
, &devices
[j
].i
);
970 fprintf(stderr
, Name
": failed to add "
975 if (i
< info
.array
.raid_disks
980 } else if (verbose
> 0)
981 fprintf(stderr
, Name
": added %s "
983 devices
[j
].devname
, mddev
,
984 devices
[j
].i
.disk
.raid_disk
);
985 } else if (verbose
> 0 && i
< info
.array
.raid_disks
)
986 fprintf(stderr
, Name
": no uptodate device for "
991 if (info
.array
.level
== LEVEL_CONTAINER
) {
993 fprintf(stderr
, Name
": Container %s has been "
994 "assembled with %d drive%s",
995 mddev
, okcnt
+sparecnt
, okcnt
+sparecnt
==1?"":"s");
996 if (okcnt
< info
.array
.raid_disks
)
997 fprintf(stderr
, " (out of %d)",
998 info
.array
.raid_disks
);
999 fprintf(stderr
, "\n");
1008 ( enough(info
.array
.level
, info
.array
.raid_disks
,
1009 info
.array
.layout
, clean
, avail
, okcnt
) &&
1010 (okcnt
>= req_cnt
|| start_partial_ok
)
1012 if (ioctl(mdfd
, RUN_ARRAY
, NULL
)==0) {
1014 fprintf(stderr
, Name
": %s has been started with %d drive%s",
1015 mddev
, okcnt
, okcnt
==1?"":"s");
1016 if (okcnt
< info
.array
.raid_disks
)
1017 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
1019 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1020 fprintf(stderr
, ".\n");
1025 /* There is a nasty race with 'mdadm --monitor'.
1026 * If it opens this device before we close it,
1027 * it gets an incomplete open on which IO
1028 * doesn't work and the capacity is
1030 * If we reopen (to check for layered devices)
1031 * before --monitor closes, we loose.
1033 * So: wait upto 1 second for there to be
1034 * a non-zero capacity.
1036 while (usecs
< 1000) {
1037 mdfd
= open(mddev
, O_RDONLY
);
1039 unsigned long long size
;
1040 if (get_dev_size(mdfd
, NULL
, &size
) &&
1051 fprintf(stderr
, Name
": failed to RUN_ARRAY %s: %s\n",
1052 mddev
, strerror(errno
));
1054 if (!enough(info
.array
.level
, info
.array
.raid_disks
,
1055 info
.array
.layout
, 1, avail
, okcnt
))
1056 fprintf(stderr
, Name
": Not enough devices to "
1057 "start the array.\n");
1058 else if (!enough(info
.array
.level
,
1059 info
.array
.raid_disks
,
1060 info
.array
.layout
, clean
,
1062 fprintf(stderr
, Name
": Not enough devices to "
1063 "start the array while not clean "
1064 "- consider --force.\n");
1067 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1072 if (runstop
== -1) {
1073 fprintf(stderr
, Name
": %s assembled from %d drive%s",
1074 mddev
, okcnt
, okcnt
==1?"":"s");
1075 if (okcnt
!= info
.array
.raid_disks
)
1076 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
1077 fprintf(stderr
, ", but not started.\n");
1078 if (must_close
) close(mdfd
);
1081 if (verbose
>= -1) {
1082 fprintf(stderr
, Name
": %s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
1084 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1085 if (!enough(info
.array
.level
, info
.array
.raid_disks
,
1086 info
.array
.layout
, 1, avail
, okcnt
))
1087 fprintf(stderr
, " - not enough to start the array.\n");
1088 else if (!enough(info
.array
.level
,
1089 info
.array
.raid_disks
,
1090 info
.array
.layout
, clean
,
1092 fprintf(stderr
, " - not enough to start the "
1093 "array while not clean - consider "
1096 if (req_cnt
== info
.array
.raid_disks
)
1097 fprintf(stderr
, " - need all %d to start it", req_cnt
);
1099 fprintf(stderr
, " - need %d of %d to start", req_cnt
, info
.array
.raid_disks
);
1100 fprintf(stderr
, " (use --run to insist).\n");
1104 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1109 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1110 * been updated to point to the current locations of devices.
1111 * so we can just start the array
1114 dev
= makedev(devices
[chosen_drive
].i
.disk
.major
,
1115 devices
[chosen_drive
].i
.disk
.minor
);
1116 if (ioctl(mdfd
, START_ARRAY
, dev
)) {
1117 fprintf(stderr
, Name
": Cannot start array: %s\n",
1122 if (must_close
) close(mdfd
);