]>
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 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
;
143 memset(&info
, 0, sizeof(info
));
145 if (get_linux_version() < 2004000)
149 vers
= md_get_version(mdfd
);
151 fprintf(stderr
, Name
": %s appears not to be an md device.\n", mddev
);
155 fprintf(stderr
, Name
": Assemble requires driver version 0.90.0 or later.\n"
156 " Upgrade your kernel or try --build\n");
160 if (ioctl(mdfd
, GET_ARRAY_INFO
, &info
.array
)>=0) {
161 fprintf(stderr
, Name
": device %s already active - cannot assemble it\n",
165 ioctl(mdfd
, STOP_ARRAY
, NULL
); /* just incase it was started but has no content */
168 * If any subdevs are listed, then any that don't
169 * match ident are discarded. Remainder must all match and
171 * If no subdevs, then we scan all devices in the config file, but
172 * there must be something in the identity
176 ident
->uuid_set
== 0 &&
177 ident
->super_minor
< 0 &&
178 ident
->devices
== NULL
) {
179 fprintf(stderr
, Name
": No identity information available for %s - cannot assemble.\n",
180 mddev
? mddev
: "further assembly");
184 devlist
= conf_get_devs();
190 tmpdev
= devlist
; num_devs
= 0;
196 tmpdev
= tmpdev
->next
;
198 devices
= malloc(num_devs
* sizeof(*devices
));
200 if (!st
&& ident
->st
) st
= ident
->st
;
203 fprintf(stderr
, Name
": looking for devices for %s\n",
204 mddev
? mddev
: "further assembly");
206 /* first walk the list of devices to find a consistent set
207 * that match the criterea, if that is possible.
208 * We flag the one we like with 'used'.
210 for (tmpdev
= devlist
;
212 tmpdev
= tmpdev
->next
) {
213 char *devname
= tmpdev
->devname
;
216 struct supertype
*tst
= dup_super(st
);
218 if (tmpdev
->used
> 1) continue;
220 if (ident
->devices
&&
221 !match_oneof(ident
->devices
, devname
)) {
222 if ((inargv
&& verbose
>=0) || verbose
> 0)
223 fprintf(stderr
, Name
": %s is not one of %s\n", devname
, ident
->devices
);
227 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
229 if ((inargv
&& verbose
>= 0) || verbose
> 0)
230 fprintf(stderr
, Name
": cannot open device %s: %s\n",
231 devname
, strerror(errno
));
233 } else if (fstat(dfd
, &stb
)< 0) {
235 fprintf(stderr
, Name
": fstat failed for %s: %s\n",
236 devname
, strerror(errno
));
238 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
239 fprintf(stderr
, Name
": %s is not a block device.\n",
242 } else if (!tst
&& (tst
= guess_super(dfd
)) == NULL
) {
243 if ((inargv
&& verbose
>= 0) || verbose
> 0)
244 fprintf(stderr
, Name
": no recogniseable superblock on %s\n",
247 } else if (tst
->ss
->load_super(tst
,dfd
, NULL
)) {
248 if ((inargv
&& verbose
>= 0) || verbose
> 0)
249 fprintf( stderr
, Name
": no RAID superblock on %s\n",
252 tst
->ss
->getinfo_super(tst
, &info
);
254 if (dfd
>= 0) close(dfd
);
256 if (ident
->uuid_set
&& (!update
|| strcmp(update
, "uuid")!= 0) &&
258 same_uuid(info
.uuid
, ident
->uuid
, tst
->ss
->swapuuid
)==0)) {
259 if ((inargv
&& verbose
>= 0) || verbose
> 0)
260 fprintf(stderr
, Name
": %s has wrong uuid.\n",
264 if (ident
->name
[0] && (!update
|| strcmp(update
, "name")!= 0) &&
266 name_matches(info
.name
, ident
->name
, homehost
)==0)) {
267 if ((inargv
&& verbose
>= 0) || verbose
> 0)
268 fprintf(stderr
, Name
": %s has wrong name.\n",
272 if (ident
->super_minor
!= UnSet
&&
274 ident
->super_minor
!= info
.array
.md_minor
)) {
275 if ((inargv
&& verbose
>= 0) || verbose
> 0)
276 fprintf(stderr
, Name
": %s has wrong super-minor.\n",
280 if (ident
->level
!= UnSet
&&
282 ident
->level
!= info
.array
.level
)) {
283 if ((inargv
&& verbose
>= 0) || verbose
> 0)
284 fprintf(stderr
, Name
": %s has wrong raid level.\n",
288 if (ident
->raid_disks
!= UnSet
&&
290 ident
->raid_disks
!= info
.array
.raid_disks
)) {
291 if ((inargv
&& verbose
>= 0) || verbose
> 0)
292 fprintf(stderr
, Name
": %s requires wrong number of drives.\n",
297 if (tst
== NULL
|| tst
->sb
== NULL
)
299 if (update
== NULL
&&
300 tst
->ss
->match_home(tst
, homehost
)==0) {
301 if ((inargv
&& verbose
>= 0) || verbose
> 0)
302 fprintf(stderr
, Name
": %s is not built for host %s.\n",
304 /* Auto-assemble, and this is not a usable host */
305 /* if update != NULL, we are updating the host
310 /* If we are this far, then we are nearly commited to this device.
311 * If the super_block doesn't exist, or doesn't match others,
312 * then we probably cannot continue
313 * However if one of the arrays is for the homehost, and
314 * the other isn't that can disambiguate.
317 if (!tst
|| !tst
->sb
) {
318 fprintf(stderr
, Name
": %s has no superblock - assembly aborted\n",
321 st
->ss
->free_super(st
);
327 if (st
->minor_version
== -1)
328 st
->minor_version
= tst
->minor_version
;
329 if (st
->ss
!= tst
->ss
||
330 st
->minor_version
!= tst
->minor_version
||
331 st
->ss
->compare_super(st
, tst
) != 0) {
332 /* Some mismatch. If exactly one array matches this host,
333 * we can resolve on that one.
334 * Or, if we are auto assembling, we just ignore the second
340 int first
= st
->ss
->match_home(st
, homehost
);
341 int last
= tst
->ss
->match_home(tst
, homehost
);
342 if (first
+last
== 1) {
343 /* We can do something */
344 if (first
) {/* just ignore this one */
345 if ((inargv
&& verbose
>= 0) || verbose
> 0)
346 fprintf(stderr
, Name
": %s misses out due to wrong homehost\n",
349 } else { /* reject all those sofar */
351 if ((inargv
&& verbose
>= 0) || verbose
> 0)
352 fprintf(stderr
, Name
": %s overrides previous devices due to good homehost\n",
354 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
362 fprintf(stderr
, Name
": superblock on %s doesn't match others - assembly aborted\n",
364 tst
->ss
->free_super(tst
);
365 st
->ss
->free_super(st
);
373 tst
->ss
->free_super(tst
);
377 /* So... it is up to me to open the device.
378 * We create a name '/dev/md/XXX' based on the info in the
379 * superblock, and call open_mddev on that
381 mdu_array_info_t inf
;
383 if (!st
|| !st
->sb
) {
386 st
->ss
->getinfo_super(st
, &info
);
387 c
= strchr(info
.name
, ':');
388 if (c
) c
++; else c
= info
.name
;
389 if (isdigit(*c
) && ((ident
->autof
& 7)==4 || (ident
->autof
&7)==6))
390 /* /dev/md/d0 style for partitionable */
391 asprintf(&mddev
, "/dev/md/d%s", c
);
393 asprintf(&mddev
, "/dev/md/%s", c
);
394 mdfd
= open_mddev(mddev
, ident
->autof
);
396 st
->ss
->free_super(st
);
400 vers
= md_get_version(mdfd
);
401 if (ioctl(mdfd
, GET_ARRAY_INFO
, &inf
)==0) {
402 for (tmpdev
= devlist
;
403 tmpdev
&& tmpdev
->used
!= 1;
404 tmpdev
= tmpdev
->next
)
406 fprintf(stderr
, Name
": %s already active, cannot restart it!\n", mddev
);
408 fprintf(stderr
, Name
": %s needed for %s...\n",
409 mddev
, tmpdev
->devname
);
412 st
->ss
->free_super(st
);
419 /* Ok, no bad inconsistancy, we can try updating etc */
421 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) if (tmpdev
->used
== 1) {
422 char *devname
= tmpdev
->devname
;
424 /* looks like a good enough match to update the super block if needed */
428 /* prepare useful information in info structures */
430 struct supertype
*tst
;
433 if (strcmp(update
, "uuid")==0 &&
436 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
437 read(rfd
, ident
->uuid
, 16) != 16) {
438 *(__u32
*)(ident
->uuid
) = random();
439 *(__u32
*)(ident
->uuid
+1) = random();
440 *(__u32
*)(ident
->uuid
+2) = random();
441 *(__u32
*)(ident
->uuid
+3) = random();
443 if (rfd
>= 0) close(rfd
);
445 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
447 remove_partitions(dfd
);
450 tst
->ss
->load_super(tst
, dfd
, NULL
);
451 tst
->ss
->getinfo_super(tst
, &info
);
453 memcpy(info
.uuid
, ident
->uuid
, 16);
454 strcpy(info
.name
, ident
->name
);
455 info
.array
.md_minor
= minor(stb2
.st_rdev
);
457 tst
->ss
->update_super(tst
, &info
, update
,
459 ident
->uuid_set
, homehost
);
460 if (strcmp(update
, "uuid")==0 &&
463 memcpy(ident
->uuid
, info
.uuid
, 16);
466 fprintf(stderr
, Name
": Cannot open %s for superblock update\n",
468 else if (tst
->ss
->store_super(tst
, dfd
))
469 fprintf(stderr
, Name
": Could not re-write superblock on %s.\n",
474 if (strcmp(update
, "uuid")==0 &&
475 ident
->bitmap_fd
>= 0 && !bitmap_done
) {
476 if (bitmap_update_uuid(ident
->bitmap_fd
,
478 tst
->ss
->swapuuid
) != 0)
479 fprintf(stderr
, Name
": Could not update uuid on external bitmap.\n");
483 tst
->ss
->free_super(tst
);
487 struct supertype
*tst
= dup_super(st
);
489 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
491 remove_partitions(dfd
);
493 tst
->ss
->load_super(tst
, dfd
, NULL
);
494 tst
->ss
->getinfo_super(tst
, &info
);
495 tst
->ss
->free_super(tst
);
502 fprintf(stderr
, Name
": %s is identified as a member of %s, slot %d.\n",
503 devname
, mddev
, info
.disk
.raid_disk
);
504 devices
[devcnt
].devname
= devname
;
505 devices
[devcnt
].uptodate
= 0;
506 devices
[devcnt
].i
= info
;
507 devices
[devcnt
].i
.disk
.major
= major(stb
.st_rdev
);
508 devices
[devcnt
].i
.disk
.minor
= minor(stb
.st_rdev
);
509 if (most_recent
< devcnt
) {
510 if (devices
[devcnt
].i
.events
511 > devices
[most_recent
].i
.events
)
512 most_recent
= devcnt
;
514 if (info
.array
.level
== -4)
515 /* with multipath, the raid_disk from the superblock is meaningless */
518 i
= devices
[devcnt
].i
.disk
.raid_disk
;
520 if (nextspare
< info
.array
.raid_disks
)
521 nextspare
= info
.array
.raid_disks
;
524 if (i
>= info
.array
.raid_disks
&&
530 unsigned int newbestcnt
= i
+10;
531 int *newbest
= malloc(sizeof(int)*newbestcnt
);
533 for (c
=0; c
< newbestcnt
; c
++)
535 newbest
[c
] = best
[c
];
540 bestcnt
= newbestcnt
;
543 devices
[best
[i
]].i
.events
544 == devices
[devcnt
].i
.events
545 && (devices
[best
[i
]].i
.disk
.minor
546 != devices
[devcnt
].i
.disk
.minor
)
548 && info
.array
.level
!= LEVEL_MULTIPATH
) {
549 /* two different devices with identical superblock.
550 * Could be a mis-detection caused by overlapping
551 * partitions. fail-safe.
553 fprintf(stderr
, Name
": WARNING %s and %s appear"
554 " to have very similar superblocks.\n"
555 " If they are really different, "
556 "please --zero the superblock on one\n"
557 " If they are the same or overlap,"
558 " please remove one from %s.\n",
559 devices
[best
[i
]].devname
, devname
,
560 inargv
? "the list" :
561 "the\n DEVICE list in mdadm.conf"
563 if (must_close
) close(mdfd
);
567 || (devices
[best
[i
]].i
.events
568 < devices
[devcnt
].i
.events
))
575 fprintf(stderr
, Name
": no devices found for %s\n",
578 st
->ss
->free_super(st
);
579 if (must_close
) close(mdfd
);
583 if (update
&& strcmp(update
, "byteorder")==0)
584 st
->minor_version
= 90;
586 st
->ss
->getinfo_super(st
, &info
);
587 clean
= info
.array
.state
& 1;
589 /* now we have some devices that might be suitable.
592 avail
= malloc(info
.array
.raid_disks
);
593 memset(avail
, 0, info
.array
.raid_disks
);
596 for (i
=0; i
< bestcnt
;i
++) {
598 int event_margin
= 1; /* always allow a difference of '1'
599 * like the kernel does
602 /* note: we ignore error flags in multipath arrays
603 * as they don't make sense
605 if (info
.array
.level
!= -4)
606 if (!(devices
[j
].i
.disk
.state
& (1<<MD_DISK_SYNC
))) {
607 if (!(devices
[j
].i
.disk
.state
608 & (1<<MD_DISK_FAULTY
)))
612 if (devices
[j
].i
.events
+event_margin
>=
613 devices
[most_recent
].i
.events
) {
614 devices
[j
].uptodate
= 1;
615 if (i
< info
.array
.raid_disks
) {
622 while (force
&& !enough(info
.array
.level
, info
.array
.raid_disks
,
623 info
.array
.layout
, 1,
625 /* Choose the newest best drive which is
626 * not up-to-date, update the superblock
630 struct supertype
*tst
;
631 long long current_events
;
633 for (i
=0; i
<info
.array
.raid_disks
&& i
< bestcnt
; i
++) {
636 !devices
[j
].uptodate
&&
637 devices
[j
].i
.events
> 0 &&
640 > devices
[chosen_drive
].i
.events
))
643 if (chosen_drive
< 0)
645 current_events
= devices
[chosen_drive
].i
.events
;
648 fprintf(stderr
, Name
": forcing event count in %s(%d) from %d upto %d\n",
649 devices
[chosen_drive
].devname
,
650 devices
[chosen_drive
].i
.disk
.raid_disk
,
651 (int)(devices
[chosen_drive
].i
.events
),
652 (int)(devices
[most_recent
].i
.events
));
653 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
655 fprintf(stderr
, Name
": Couldn't open %s for write - not updating\n",
656 devices
[chosen_drive
].devname
);
657 devices
[chosen_drive
].i
.events
= 0;
661 if (tst
->ss
->load_super(tst
,fd
, NULL
)) {
663 fprintf(stderr
, Name
": RAID superblock disappeared from %s - not updating.\n",
664 devices
[chosen_drive
].devname
);
665 devices
[chosen_drive
].i
.events
= 0;
668 info
.events
= devices
[most_recent
].i
.events
;
669 tst
->ss
->update_super(tst
, &info
, "force-one",
670 devices
[chosen_drive
].devname
, verbose
,
673 if (tst
->ss
->store_super(tst
, fd
)) {
675 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
676 devices
[chosen_drive
].devname
);
677 devices
[chosen_drive
].i
.events
= 0;
678 tst
->ss
->free_super(tst
);
682 devices
[chosen_drive
].i
.events
= devices
[most_recent
].i
.events
;
683 devices
[chosen_drive
].uptodate
= 1;
684 avail
[chosen_drive
] = 1;
686 tst
->ss
->free_super(tst
);
688 /* If there are any other drives of the same vintage,
689 * add them in as well. We can't lose and we might gain
691 for (i
=0; i
<info
.array
.raid_disks
&& i
< bestcnt
; i
++) {
694 !devices
[j
].uptodate
&&
695 devices
[j
].i
.events
> 0 &&
696 devices
[j
].i
.events
== current_events
) {
703 /* Now we want to look at the superblock which the kernel will base things on
704 * and compare the devices that we think are working with the devices that the
705 * superblock thinks are working.
706 * If there are differences and --force is given, then update this chosen
710 st
->ss
->free_super(st
);
711 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
++) {
717 if (!devices
[j
].uptodate
)
720 if ((fd
=dev_open(devices
[j
].devname
, O_RDONLY
|O_EXCL
))< 0) {
721 fprintf(stderr
, Name
": Cannot open %s: %s\n",
722 devices
[j
].devname
, strerror(errno
));
723 if (must_close
) close(mdfd
);
726 if (st
->ss
->load_super(st
,fd
, NULL
)) {
728 fprintf(stderr
, Name
": RAID superblock has disappeared from %s\n",
730 if (must_close
) close(mdfd
);
735 if (st
->sb
== NULL
) {
736 fprintf(stderr
, Name
": No suitable drives found for %s\n", mddev
);
737 if (must_close
) close(mdfd
);
740 st
->ss
->getinfo_super(st
, &info
);
742 sysfs_init(&info
, mdfd
, 0);
744 for (i
=0; i
<bestcnt
; i
++) {
746 unsigned int desired_state
;
748 if (i
< info
.array
.raid_disks
)
749 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
755 if (!devices
[j
].uptodate
)
758 devices
[j
].i
.disk
.state
= desired_state
;
760 if (st
->ss
->update_super(st
, &devices
[j
].i
, "assemble", NULL
,
764 fprintf(stderr
, Name
": "
765 "clearing FAULTY flag for device %d in %s for %s\n",
766 j
, mddev
, devices
[j
].devname
);
770 fprintf(stderr
, Name
": "
771 "device %d in %s has wrong state in superblock, but %s seems ok\n",
772 i
, mddev
, devices
[j
].devname
);
776 if (!(super
.disks
[i
].i
.disk
.state
& (1 << MD_DISK_FAULTY
))) {
777 fprintf(stderr
, Name
": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
782 if (force
&& !clean
&&
783 !enough(info
.array
.level
, info
.array
.raid_disks
,
784 info
.array
.layout
, clean
,
786 change
+= st
->ss
->update_super(st
, &info
, "force-array",
787 devices
[chosen_drive
].devname
, verbose
,
794 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
796 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
797 devices
[chosen_drive
].devname
);
798 if (must_close
) close(mdfd
);
801 if (st
->ss
->store_super(st
, fd
)) {
803 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
804 devices
[chosen_drive
].devname
);
805 if (must_close
) close(mdfd
);
811 /* If we are in the middle of a reshape we may need to restore saved data
812 * that was moved aside due to the reshape overwriting live data
813 * The code of doing this lives in Grow.c
816 if (info
.reshape_active
) {
818 int *fdlist
= malloc(sizeof(int)* bestcnt
);
819 for (i
=0; i
<bestcnt
; i
++) {
822 fdlist
[i
] = dev_open(devices
[j
].devname
, O_RDWR
|O_EXCL
);
824 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
833 err
= Grow_restart(st
, &info
, fdlist
, bestcnt
, backup_file
);
836 if (fdlist
[i
]>=0) close(fdlist
[i
]);
839 fprintf(stderr
, Name
": Failed to restore critical section for reshape, sorry.\n");
840 if (must_close
) close(mdfd
);
845 /* count number of in-sync devices according to the superblock.
846 * We must have this number to start the array without -s or -R
848 req_cnt
= info
.array
.working_disks
;
850 /* Almost ready to actually *do* something */
854 rv
= set_array_info(mdfd
, st
, &info
);
856 fprintf(stderr
, Name
": failed to set array info for %s: %s\n",
857 mddev
, strerror(errno
));
858 if (must_close
) close(mdfd
);
861 if (ident
->bitmap_fd
>= 0) {
862 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
863 fprintf(stderr
, Name
": SET_BITMAP_FILE failed.\n");
864 if (must_close
) close(mdfd
);
867 } else if (ident
->bitmap_file
) {
868 /* From config file */
869 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
871 fprintf(stderr
, Name
": Could not open bitmap file %s\n",
873 if (must_close
) close(mdfd
);
876 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
877 fprintf(stderr
, Name
": Failed to set bitmapfile for %s\n", mddev
);
879 if (must_close
) close(mdfd
);
885 /* First, add the raid disks, but add the chosen one last */
886 for (i
=0; i
<= bestcnt
; i
++) {
890 if (j
== chosen_drive
)
895 if (j
>= 0 /* && devices[j].uptodate */) {
896 rv
= add_disk(mdfd
, st
, &info
, &devices
[j
].i
);
899 fprintf(stderr
, Name
": failed to add "
904 if (i
< info
.array
.raid_disks
909 } else if (verbose
> 0)
910 fprintf(stderr
, Name
": added %s "
912 devices
[j
].devname
, mddev
,
913 devices
[j
].i
.disk
.raid_disk
);
914 } else if (verbose
> 0 && i
< info
.array
.raid_disks
)
915 fprintf(stderr
, Name
": no uptodate device for "
920 if (info
.array
.level
== LEVEL_CONTAINER
) {
922 fprintf(stderr
, Name
": Container %s has been "
923 "assembled with %d drive%s",
924 mddev
, okcnt
, okcnt
==1?"":"s");
925 if (okcnt
< info
.array
.raid_disks
)
926 fprintf(stderr
, " (out of %d)",
927 info
.array
.raid_disks
);
928 fprintf(stderr
, "\n");
937 ( enough(info
.array
.level
, info
.array
.raid_disks
,
938 info
.array
.layout
, clean
, avail
, okcnt
) &&
939 (okcnt
>= req_cnt
|| start_partial_ok
)
941 if (ioctl(mdfd
, RUN_ARRAY
, NULL
)==0) {
943 fprintf(stderr
, Name
": %s has been started with %d drive%s",
944 mddev
, okcnt
, okcnt
==1?"":"s");
945 if (okcnt
< info
.array
.raid_disks
)
946 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
948 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
949 fprintf(stderr
, ".\n");
954 /* There is a nasty race with 'mdadm --monitor'.
955 * If it opens this device before we close it,
956 * it gets an incomplete open on which IO
957 * doesn't work and the capacity is
959 * If we reopen (to check for layered devices)
960 * before --monitor closes, we loose.
962 * So: wait upto 1 second for there to be
963 * a non-zero capacity.
965 while (usecs
< 1000) {
966 mdfd
= open(mddev
, O_RDONLY
);
968 unsigned long long size
;
969 if (get_dev_size(mdfd
, NULL
, &size
) &&
980 fprintf(stderr
, Name
": failed to RUN_ARRAY %s: %s\n",
981 mddev
, strerror(errno
));
983 if (!enough(info
.array
.level
, info
.array
.raid_disks
,
984 info
.array
.layout
, 1, avail
, okcnt
))
985 fprintf(stderr
, Name
": Not enough devices to "
986 "start the array.\n");
987 else if (!enough(info
.array
.level
,
988 info
.array
.raid_disks
,
989 info
.array
.layout
, clean
,
991 fprintf(stderr
, Name
": Not enough devices to "
992 "start the array while not clean "
993 "- consider --force.\n");
996 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1001 if (runstop
== -1) {
1002 fprintf(stderr
, Name
": %s assembled from %d drive%s",
1003 mddev
, okcnt
, okcnt
==1?"":"s");
1004 if (okcnt
!= info
.array
.raid_disks
)
1005 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
1006 fprintf(stderr
, ", but not started.\n");
1007 if (must_close
) close(mdfd
);
1010 if (verbose
>= -1) {
1011 fprintf(stderr
, Name
": %s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
1013 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1014 if (!enough(info
.array
.level
, info
.array
.raid_disks
,
1015 info
.array
.layout
, 1, avail
, okcnt
))
1016 fprintf(stderr
, " - not enough to start the array.\n");
1017 else if (!enough(info
.array
.level
,
1018 info
.array
.raid_disks
,
1019 info
.array
.layout
, clean
,
1021 fprintf(stderr
, " - not enough to start the "
1022 "array while not clean - consider "
1025 if (req_cnt
== info
.array
.raid_disks
)
1026 fprintf(stderr
, " - need all %d to start it", req_cnt
);
1028 fprintf(stderr
, " - need %d of %d to start", req_cnt
, info
.array
.raid_disks
);
1029 fprintf(stderr
, " (use --run to insist).\n");
1033 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1038 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1039 * been updated to point to the current locations of devices.
1040 * so we can just start the array
1043 dev
= makedev(devices
[chosen_drive
].i
.disk
.major
,
1044 devices
[chosen_drive
].i
.disk
.minor
);
1045 if (ioctl(mdfd
, START_ARRAY
, dev
)) {
1046 fprintf(stderr
, Name
": Cannot start array: %s\n",
1051 if (must_close
) close(mdfd
);