]>
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
32 static int name_matches(char *found
, char *required
, char *homehost
)
34 /* See if the name found matches the required name, possibly
35 * prefixed with 'homehost'
39 strncpy(fnd
, found
, 32);
41 if (strcmp(found
, required
)==0)
44 int l
= strlen(homehost
);
45 if (l
< 32 && fnd
[l
] == ':' &&
46 strcmp(fnd
+l
+1, required
)==0)
52 int Assemble(struct supertype
*st
, char *mddev
, int mdfd
,
53 mddev_ident_t ident
, char *conffile
,
54 mddev_dev_t devlist
, char *backup_file
,
55 int readonly
, int runstop
,
56 char *update
, char *homehost
,
57 int verbose
, int force
)
60 * The task of Assemble is to find a collection of
61 * devices that should (according to their superblocks)
62 * form an array, and to give this collection to the MD driver.
63 * In Linux-2.4 and later, this involves submitting a
64 * SET_ARRAY_INFO ioctl with no arg - to prepare
65 * the array - and then submit a number of
66 * ADD_NEW_DISK ioctls to add disks into
67 * the array. Finally RUN_ARRAY might
68 * be submitted to start the array.
70 * Much of the work of Assemble is in finding and/or
71 * checking the disks to make sure they look right.
73 * If mddev is not set, then scan must be set and we
74 * read through the config file for dev+uuid mapping
75 * We recurse, setting mddev, for each device that
77 * - has a valid uuid (or any uuid if !uuidset)
79 * If mddev is set, we try to determine state of md.
80 * check version - must be at least 0.90.0
81 * check kernel version. must be at least 2.4.
82 * If not, we can possibly fall back on START_ARRAY
83 * Try to GET_ARRAY_INFO.
84 * If possible, give up
85 * If not, try to STOP_ARRAY just to make sure
87 * If !uuidset and scan, look in conf-file for uuid
88 * If not found, give up
89 * If !devlist and scan and uuidset, get list of devs from conf-file
92 * Check superblock - discard if bad
93 * Check uuid (set if we don't have one) - discard if no match
94 * Check superblock similarity if we have a superblock - discard if different
95 * Record events, devicenum
96 * This should give us a list of devices for the array
97 * We should collect the most recent event number
99 * Count disks with recent enough event count
100 * While force && !enough disks
101 * Choose newest rejected disks, update event count
102 * mark clean and rewrite superblock
105 * foreach device with recent events : ADD_NEW_DISK
106 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
108 * Check the device numbers in superblock are right
109 * update superblock if any changes
116 void *first_super
= NULL
, *super
= NULL
;
119 unsigned int major
, minor
;
120 unsigned int oldmajor
, oldminor
;
127 int *best
= NULL
; /* indexed by raid_disk */
128 unsigned int bestcnt
= 0;
130 unsigned int okcnt
, sparecnt
;
131 unsigned int req_cnt
;
137 int start_partial_ok
= (runstop
>= 0) && (force
|| devlist
==NULL
);
138 unsigned int num_devs
;
144 if (get_linux_version() < 2004000)
148 vers
= md_get_version(mdfd
);
150 fprintf(stderr
, Name
": %s appears not to be an md device.\n", mddev
);
154 fprintf(stderr
, Name
": Assemble requires driver version 0.90.0 or later.\n"
155 " Upgrade your kernel or try --build\n");
159 if (ioctl(mdfd
, GET_ARRAY_INFO
, &info
.array
)>=0) {
160 fprintf(stderr
, Name
": device %s already active - cannot assemble it\n",
164 ioctl(mdfd
, STOP_ARRAY
, NULL
); /* just incase it was started but has no content */
167 * If any subdevs are listed, then any that don't
168 * match ident are discarded. Remainder must all match and
170 * If no subdevs, then we scan all devices in the config file, but
171 * there must be something in the identity
175 ident
->uuid_set
== 0 &&
176 ident
->super_minor
< 0 &&
177 ident
->devices
== NULL
) {
178 fprintf(stderr
, Name
": No identity information available for %s - cannot assemble.\n",
179 mddev
? mddev
: "further assembly");
183 devlist
= conf_get_devs(conffile
);
187 tmpdev
= devlist
; num_devs
= 0;
193 tmpdev
= tmpdev
->next
;
195 devices
= malloc(num_devs
* sizeof(*devices
));
197 if (!st
&& ident
->st
) st
= ident
->st
;
200 fprintf(stderr
, Name
": looking for devices for %s\n",
201 mddev
? mddev
: "further assembly");
203 /* first walk the list of devices to find a consistent set
204 * that match the criterea, if that is possible.
205 * We flag the one we like with 'used'.
207 for (tmpdev
= devlist
;
209 tmpdev
= tmpdev
->next
) {
210 char *devname
= tmpdev
->devname
;
213 struct supertype
*tst
= st
;
215 if (tmpdev
->used
> 1) continue;
217 if (ident
->devices
&&
218 !match_oneof(ident
->devices
, devname
)) {
219 if ((inargv
&& verbose
>=0) || verbose
> 0)
220 fprintf(stderr
, Name
": %s is not one of %s\n", devname
, ident
->devices
);
229 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
231 if ((inargv
&& verbose
>= 0) || verbose
> 0)
232 fprintf(stderr
, Name
": cannot open device %s: %s\n",
233 devname
, strerror(errno
));
235 } else if (fstat(dfd
, &stb
)< 0) {
237 fprintf(stderr
, Name
": fstat failed for %s: %s\n",
238 devname
, strerror(errno
));
240 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
241 fprintf(stderr
, Name
": %s is not a block device.\n",
244 } else if (!tst
&& (tst
= guess_super(dfd
)) == NULL
) {
245 if ((inargv
&& verbose
>= 0) || verbose
> 0)
246 fprintf(stderr
, Name
": no recogniseable superblock on %s\n",
249 } else if (tst
->ss
->load_super(tst
,dfd
, &super
, NULL
)) {
250 if ((inargv
&& verbose
>= 0) || verbose
> 0)
251 fprintf( stderr
, Name
": no RAID superblock on %s\n",
254 tst
->ss
->getinfo_super(&info
, super
);
256 if (dfd
>= 0) close(dfd
);
258 if (ident
->uuid_set
&& (!update
|| strcmp(update
, "uuid")!= 0) &&
259 (!super
|| same_uuid(info
.uuid
, ident
->uuid
, tst
->ss
->swapuuid
)==0)) {
260 if ((inargv
&& verbose
>= 0) || verbose
> 0)
261 fprintf(stderr
, Name
": %s has wrong uuid.\n",
265 if (ident
->name
[0] && (!update
|| strcmp(update
, "name")!= 0) &&
266 (!super
|| 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
&&
273 (!super
|| ident
->super_minor
!= info
.array
.md_minor
)) {
274 if ((inargv
&& verbose
>= 0) || verbose
> 0)
275 fprintf(stderr
, Name
": %s has wrong super-minor.\n",
279 if (ident
->level
!= UnSet
&&
280 (!super
|| ident
->level
!= info
.array
.level
)) {
281 if ((inargv
&& verbose
>= 0) || verbose
> 0)
282 fprintf(stderr
, Name
": %s has wrong raid level.\n",
286 if (ident
->raid_disks
!= UnSet
&&
287 (!super
|| ident
->raid_disks
!= info
.array
.raid_disks
)) {
288 if ((inargv
&& verbose
>= 0) || verbose
> 0)
289 fprintf(stderr
, Name
": %s requires wrong number of drives.\n",
294 if (tst
== NULL
|| super
== NULL
)
296 if (tst
->ss
->match_home(super
, homehost
)==0) {
297 if ((inargv
&& verbose
>= 0) || verbose
> 0)
298 fprintf(stderr
, Name
": %s is not built for host %s.\n",
300 /* Auto-assemble, and this is not a usable host */
304 /* If we are this far, then we are nearly commited to this device.
305 * If the super_block doesn't exist, or doesn't match others,
306 * then we probably cannot continue
307 * However if one of the arrays is for the homehost, and
308 * the other isn't that can disambiguate.
312 fprintf(stderr
, Name
": %s has no superblock - assembly aborted\n",
320 if (st
->ss
!= tst
->ss
||
321 st
->minor_version
!= tst
->minor_version
||
322 st
->ss
->compare_super(&first_super
, super
) != 0) {
323 /* Some mismatch. If exactly one array matches this host,
324 * we can resolve on that one.
325 * Or, if we are auto assembling, we just ignore the second
331 int first
= st
->ss
->match_home(first_super
, homehost
);
332 int last
= tst
->ss
->match_home(super
, homehost
);
333 if (first
+last
== 1) {
334 /* We can do something */
335 if (first
) {/* just ignore this one */
336 if ((inargv
&& verbose
>= 0) || verbose
> 0)
337 fprintf(stderr
, Name
": %s misses out due to wrong homehost\n",
340 } else { /* reject all those sofar */
342 if ((inargv
&& verbose
>= 0) || verbose
> 0)
343 fprintf(stderr
, Name
": %s overrides previous devices due to good homehost\n",
345 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
353 fprintf(stderr
, Name
": superblock on %s doesn't match others - assembly aborted\n",
364 /* So... it is up to me to open the device.
365 * We create a name '/dev/md/XXX' based on the info in the
366 * superblock, and call open_mddev on that
368 mdu_array_info_t inf
;
373 st
->ss
->getinfo_super(&info
, first_super
);
374 c
= strchr(info
.name
, ':');
375 if (c
) c
++; else c
= info
.name
;
376 asprintf(&mddev
, "/dev/md/%s", c
);
377 mdfd
= open_mddev(mddev
, ident
->autof
);
380 vers
= md_get_version(mdfd
);
381 if (ioctl(mdfd
, GET_ARRAY_INFO
, &inf
)==0) {
382 fprintf(stderr
, Name
": %s already active, cannot restart it!\n", mddev
);
390 /* Ok, no bad inconsistancy, we can try updating etc */
391 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) if (tmpdev
->used
== 1) {
392 char *devname
= tmpdev
->devname
;
394 /* looks like a good enough match to update the super block if needed */
397 /* prepare useful information in info structures */
401 if (strcmp(update
, "uuid")==0 &&
404 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
405 read(rfd
, ident
->uuid
, 16) != 16) {
406 *(__u32
*)(ident
->uuid
) = random();
407 *(__u32
*)(ident
->uuid
+1) = random();
408 *(__u32
*)(ident
->uuid
+2) = random();
409 *(__u32
*)(ident
->uuid
+3) = random();
411 if (rfd
>= 0) close(rfd
);
413 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
420 st
->ss
->load_super(st
, dfd
, &super
, NULL
);
421 st
->ss
->getinfo_super(&info
, super
);
423 memcpy(info
.uuid
, ident
->uuid
, 16);
424 strcpy(info
.name
, ident
->name
);
425 info
.array
.md_minor
= minor(stb2
.st_rdev
);
427 st
->ss
->update_super(&info
, super
, update
, devname
, verbose
,
428 ident
->uuid_set
, homehost
);
429 if (strcmp(update
, "uuid")==0 &&
432 memcpy(ident
->uuid
, info
.uuid
, 16);
435 fprintf(stderr
, Name
": Cannot open %s for superblock update\n",
437 else if (st
->ss
->store_super(st
, dfd
, super
))
438 fprintf(stderr
, Name
": Could not re-write superblock on %s.\n",
443 if (strcmp(update
, "uuid")==0 &&
445 bitmap_update_uuid(ident
->bitmap_fd
, info
.uuid
);
448 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
455 st
->ss
->load_super(st
, dfd
, &super
, NULL
);
456 st
->ss
->getinfo_super(&info
, super
);
463 fprintf(stderr
, Name
": %s is identified as a member of %s, slot %d.\n",
464 devname
, mddev
, info
.disk
.raid_disk
);
465 devices
[devcnt
].devname
= devname
;
466 devices
[devcnt
].major
= major(stb
.st_rdev
);
467 devices
[devcnt
].minor
= minor(stb
.st_rdev
);
468 devices
[devcnt
].oldmajor
= info
.disk
.major
;
469 devices
[devcnt
].oldminor
= info
.disk
.minor
;
470 devices
[devcnt
].events
= info
.events
;
471 devices
[devcnt
].raid_disk
= info
.disk
.raid_disk
;
472 devices
[devcnt
].disk_nr
= info
.disk
.number
;
473 devices
[devcnt
].uptodate
= 0;
474 devices
[devcnt
].state
= info
.disk
.state
;
475 if (most_recent
< devcnt
) {
476 if (devices
[devcnt
].events
477 > devices
[most_recent
].events
)
478 most_recent
= devcnt
;
480 if (info
.array
.level
== -4)
481 /* with multipath, the raid_disk from the superblock is meaningless */
484 i
= devices
[devcnt
].raid_disk
;
486 if (nextspare
< info
.array
.raid_disks
)
487 nextspare
= info
.array
.raid_disks
;
492 unsigned int newbestcnt
= i
+10;
493 int *newbest
= malloc(sizeof(int)*newbestcnt
);
495 for (c
=0; c
< newbestcnt
; c
++)
497 newbest
[c
] = best
[c
];
502 bestcnt
= newbestcnt
;
505 || devices
[best
[i
]].events
< devices
[devcnt
].events
)
515 if (update
&& strcmp(update
, "byteorder")==0)
516 st
->minor_version
= 90;
519 fprintf(stderr
, Name
": no devices found for %s\n",
522 if (must_close
) close(mdfd
);
526 st
->ss
->getinfo_super(&info
, first_super
);
528 /* now we have some devices that might be suitable.
531 avail
= malloc(info
.array
.raid_disks
);
532 memset(avail
, 0, info
.array
.raid_disks
);
535 for (i
=0; i
< bestcnt
;i
++) {
537 int event_margin
= 1; /* always allow a difference of '1'
538 * like the kernel does
541 /* note: we ignore error flags in multipath arrays
542 * as they don't make sense
544 if (info
.array
.level
!= -4)
545 if (!(devices
[j
].state
& (1<<MD_DISK_SYNC
))) {
546 if (!(devices
[j
].state
& (1<<MD_DISK_FAULTY
)))
550 if (devices
[j
].events
+event_margin
>=
551 devices
[most_recent
].events
) {
552 devices
[j
].uptodate
= 1;
553 if (i
< info
.array
.raid_disks
) {
560 while (force
&& !enough(info
.array
.level
, info
.array
.raid_disks
,
563 /* Choose the newest best drive which is
564 * not up-to-date, update the superblock
569 for (i
=0; i
<info
.array
.raid_disks
&& i
< bestcnt
; i
++) {
572 !devices
[j
].uptodate
&&
573 devices
[j
].events
> 0 &&
575 devices
[j
].events
> devices
[chosen_drive
].events
))
578 if (chosen_drive
< 0)
581 fprintf(stderr
, Name
": forcing event count in %s(%d) from %d upto %d\n",
582 devices
[chosen_drive
].devname
, devices
[chosen_drive
].raid_disk
,
583 (int)(devices
[chosen_drive
].events
),
584 (int)(devices
[most_recent
].events
));
585 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
587 fprintf(stderr
, Name
": Couldn't open %s for write - not updating\n",
588 devices
[chosen_drive
].devname
);
589 devices
[chosen_drive
].events
= 0;
592 if (st
->ss
->load_super(st
,fd
, &super
, NULL
)) {
594 fprintf(stderr
, Name
": RAID superblock disappeared from %s - not updating.\n",
595 devices
[chosen_drive
].devname
);
596 devices
[chosen_drive
].events
= 0;
599 info
.events
= devices
[most_recent
].events
;
600 st
->ss
->update_super(&info
, super
, "force", devices
[chosen_drive
].devname
, verbose
, 0, NULL
);
602 if (st
->ss
->store_super(st
, fd
, super
)) {
604 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
605 devices
[chosen_drive
].devname
);
606 devices
[chosen_drive
].events
= 0;
611 devices
[chosen_drive
].events
= devices
[most_recent
].events
;
612 devices
[chosen_drive
].uptodate
= 1;
613 avail
[chosen_drive
] = 1;
618 /* Now we want to look at the superblock which the kernel will base things on
619 * and compare the devices that we think are working with the devices that the
620 * superblock thinks are working.
621 * If there are differences and --force is given, then update this chosen
626 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
++) {
632 if (!devices
[j
].uptodate
)
635 if ((fd
=dev_open(devices
[j
].devname
, O_RDONLY
|O_EXCL
))< 0) {
636 fprintf(stderr
, Name
": Cannot open %s: %s\n",
637 devices
[j
].devname
, strerror(errno
));
638 if (must_close
) close(mdfd
);
641 if (st
->ss
->load_super(st
,fd
, &super
, NULL
)) {
643 fprintf(stderr
, Name
": RAID superblock has disappeared from %s\n",
645 if (must_close
) close(mdfd
);
651 fprintf(stderr
, Name
": No suitable drives found for %s\n", mddev
);
652 if (must_close
) close(mdfd
);
655 st
->ss
->getinfo_super(&info
, super
);
656 for (i
=0; i
<bestcnt
; i
++) {
658 unsigned int desired_state
;
660 if (i
< info
.array
.raid_disks
)
661 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
667 if (!devices
[j
].uptodate
)
669 info
.disk
.number
= devices
[j
].disk_nr
;
670 info
.disk
.raid_disk
= i
;
671 info
.disk
.state
= desired_state
;
673 if (devices
[j
].uptodate
&&
674 st
->ss
->update_super(&info
, super
, "assemble", NULL
, verbose
, 0, NULL
)) {
677 fprintf(stderr
, Name
": "
678 "clearing FAULTY flag for device %d in %s for %s\n",
679 j
, mddev
, devices
[j
].devname
);
683 fprintf(stderr
, Name
": "
684 "device %d in %s has wrong state in superblock, but %s seems ok\n",
685 i
, mddev
, devices
[j
].devname
);
689 if (!devices
[j
].uptodate
&&
690 !(super
.disks
[i
].state
& (1 << MD_DISK_FAULTY
))) {
691 fprintf(stderr
, Name
": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
696 if (force
&& okcnt
== info
.array
.raid_disks
-1) {
697 /* FIXME check event count */
698 change
+= st
->ss
->update_super(&info
, super
, "force",
699 devices
[chosen_drive
].devname
, verbose
, 0, NULL
);
704 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
706 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
707 devices
[chosen_drive
].devname
);
708 if (must_close
) close(mdfd
);
711 if (st
->ss
->store_super(st
, fd
, super
)) {
713 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
714 devices
[chosen_drive
].devname
);
715 if (must_close
) close(mdfd
);
721 /* If we are in the middle of a reshape we may need to restore saved data
722 * that was moved aside due to the reshape overwriting live data
723 * The code of doing this lives in Grow.c
726 if (info
.reshape_active
) {
728 int *fdlist
= malloc(sizeof(int)* bestcnt
);
729 for (i
=0; i
<bestcnt
; i
++) {
732 fdlist
[i
] = dev_open(devices
[j
].devname
, O_RDWR
|O_EXCL
);
734 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
743 err
= Grow_restart(st
, &info
, fdlist
, bestcnt
, backup_file
);
746 if (fdlist
[i
]>=0) close(fdlist
[i
]);
749 fprintf(stderr
, Name
": Failed to restore critical section for reshape, sorry.\n");
750 if (must_close
) close(mdfd
);
755 /* count number of in-sync devices according to the superblock.
756 * We must have this number to start the array without -s or -R
758 req_cnt
= info
.array
.working_disks
;
760 /* Almost ready to actually *do* something */
763 if ((vers
% 100) >= 1) { /* can use different versions */
764 mdu_array_info_t inf
;
765 memset(&inf
, 0, sizeof(inf
));
766 inf
.major_version
= st
->ss
->major
;
767 inf
.minor_version
= st
->minor_version
;
768 rv
= ioctl(mdfd
, SET_ARRAY_INFO
, &inf
);
770 rv
= ioctl(mdfd
, SET_ARRAY_INFO
, NULL
);
773 fprintf(stderr
, Name
": SET_ARRAY_INFO failed for %s: %s\n",
774 mddev
, strerror(errno
));
775 if (must_close
) close(mdfd
);
778 if (ident
->bitmap_fd
>= 0) {
779 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
780 fprintf(stderr
, Name
": SET_BITMAP_FILE failed.\n");
781 if (must_close
) close(mdfd
);
784 } else if (ident
->bitmap_file
) {
785 /* From config file */
786 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
788 fprintf(stderr
, Name
": Could not open bitmap file %s\n",
790 if (must_close
) close(mdfd
);
793 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
794 fprintf(stderr
, Name
": Failed to set bitmapfile for %s\n", mddev
);
796 if (must_close
) close(mdfd
);
802 /* First, add the raid disks, but add the chosen one last */
803 for (i
=0; i
<= bestcnt
; i
++) {
807 if (j
== chosen_drive
)
812 if (j
>= 0 /* && devices[j].uptodate */) {
813 mdu_disk_info_t disk
;
814 memset(&disk
, 0, sizeof(disk
));
815 disk
.major
= devices
[j
].major
;
816 disk
.minor
= devices
[j
].minor
;
817 if (ioctl(mdfd
, ADD_NEW_DISK
, &disk
)!=0) {
818 fprintf(stderr
, Name
": failed to add %s to %s: %s\n",
822 if (i
< info
.array
.raid_disks
|| i
== bestcnt
)
826 } else if (verbose
> 0)
827 fprintf(stderr
, Name
": added %s to %s as %d\n",
828 devices
[j
].devname
, mddev
, devices
[j
].raid_disk
);
829 } else if (verbose
> 0 && i
< info
.array
.raid_disks
)
830 fprintf(stderr
, Name
": no uptodate device for slot %d of %s\n",
836 ( enough(info
.array
.level
, info
.array
.raid_disks
, info
.array
.layout
, avail
, okcnt
) &&
837 (okcnt
>= req_cnt
|| start_partial_ok
)
839 if (ioctl(mdfd
, RUN_ARRAY
, NULL
)==0) {
841 fprintf(stderr
, Name
": %s has been started with %d drive%s",
842 mddev
, okcnt
, okcnt
==1?"":"s");
843 if (okcnt
< info
.array
.raid_disks
)
844 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
846 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
847 fprintf(stderr
, ".\n");
849 if (must_close
) close(mdfd
);
852 fprintf(stderr
, Name
": failed to RUN_ARRAY %s: %s\n",
853 mddev
, strerror(errno
));
854 if (must_close
) close(mdfd
);
858 fprintf(stderr
, Name
": %s assembled from %d drive%s",
859 mddev
, okcnt
, okcnt
==1?"":"s");
860 if (okcnt
!= info
.array
.raid_disks
)
861 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
862 fprintf(stderr
, ", but not started.\n");
863 if (must_close
) close(mdfd
);
867 fprintf(stderr
, Name
": %s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
869 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
870 if (!enough(info
.array
.level
, info
.array
.raid_disks
, info
.array
.layout
, avail
, okcnt
))
871 fprintf(stderr
, " - not enough to start the array.\n");
873 if (req_cnt
== info
.array
.raid_disks
)
874 fprintf(stderr
, " - need all %d to start it", req_cnt
);
876 fprintf(stderr
, " - need %d of %d to start", req_cnt
, info
.array
.raid_disks
);
877 fprintf(stderr
, " (use --run to insist).\n");
880 if (must_close
) close(mdfd
);
883 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
884 * been updated to point to the current locations of devices.
885 * so we can just start the array
888 dev
= makedev(devices
[chosen_drive
].major
,
889 devices
[chosen_drive
].minor
);
890 if (ioctl(mdfd
, START_ARRAY
, dev
)) {
891 fprintf(stderr
, Name
": Cannot start array: %s\n",
896 if (must_close
) close(mdfd
);