]>
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
116 int vers
= 0; /* Keep gcc quite - it really is initialised */
117 void *first_super
= NULL
, *super
= NULL
;
120 unsigned int major
, minor
;
121 unsigned int oldmajor
, oldminor
;
128 int *best
= NULL
; /* indexed by raid_disk */
129 unsigned int bestcnt
= 0;
131 unsigned int okcnt
, sparecnt
;
132 unsigned int req_cnt
;
138 int start_partial_ok
= (runstop
>= 0) && (force
|| devlist
==NULL
|| mdfd
< 0);
139 unsigned int num_devs
;
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();
188 tmpdev
= devlist
; num_devs
= 0;
194 tmpdev
= tmpdev
->next
;
196 devices
= malloc(num_devs
* sizeof(*devices
));
198 if (!st
&& ident
->st
) st
= ident
->st
;
201 fprintf(stderr
, Name
": looking for devices for %s\n",
202 mddev
? mddev
: "further assembly");
204 /* first walk the list of devices to find a consistent set
205 * that match the criterea, if that is possible.
206 * We flag the one we like with 'used'.
208 for (tmpdev
= devlist
;
210 tmpdev
= tmpdev
->next
) {
211 char *devname
= tmpdev
->devname
;
214 struct supertype
*tst
= st
;
216 if (tmpdev
->used
> 1) continue;
218 if (ident
->devices
&&
219 !match_oneof(ident
->devices
, devname
)) {
220 if ((inargv
&& verbose
>=0) || verbose
> 0)
221 fprintf(stderr
, Name
": %s is not one of %s\n", devname
, ident
->devices
);
230 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
232 if ((inargv
&& verbose
>= 0) || verbose
> 0)
233 fprintf(stderr
, Name
": cannot open device %s: %s\n",
234 devname
, strerror(errno
));
236 } else if (fstat(dfd
, &stb
)< 0) {
238 fprintf(stderr
, Name
": fstat failed for %s: %s\n",
239 devname
, strerror(errno
));
241 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
242 fprintf(stderr
, Name
": %s is not a block device.\n",
245 } else if (!tst
&& (tst
= guess_super(dfd
)) == NULL
) {
246 if ((inargv
&& verbose
>= 0) || verbose
> 0)
247 fprintf(stderr
, Name
": no recogniseable superblock on %s\n",
250 } else if (tst
->ss
->load_super(tst
,dfd
, &super
, NULL
)) {
251 if ((inargv
&& verbose
>= 0) || verbose
> 0)
252 fprintf( stderr
, Name
": no RAID superblock on %s\n",
255 tst
->ss
->getinfo_super(&info
, super
);
257 if (dfd
>= 0) close(dfd
);
259 if (ident
->uuid_set
&& (!update
|| strcmp(update
, "uuid")!= 0) &&
260 (!super
|| same_uuid(info
.uuid
, ident
->uuid
, tst
->ss
->swapuuid
)==0)) {
261 if ((inargv
&& verbose
>= 0) || verbose
> 0)
262 fprintf(stderr
, Name
": %s has wrong uuid.\n",
266 if (ident
->name
[0] && (!update
|| strcmp(update
, "name")!= 0) &&
267 (!super
|| name_matches(info
.name
, ident
->name
, homehost
)==0)) {
268 if ((inargv
&& verbose
>= 0) || verbose
> 0)
269 fprintf(stderr
, Name
": %s has wrong name.\n",
273 if (ident
->super_minor
!= UnSet
&&
274 (!super
|| 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
&&
281 (!super
|| ident
->level
!= info
.array
.level
)) {
282 if ((inargv
&& verbose
>= 0) || verbose
> 0)
283 fprintf(stderr
, Name
": %s has wrong raid level.\n",
287 if (ident
->raid_disks
!= UnSet
&&
288 (!super
|| ident
->raid_disks
!= info
.array
.raid_disks
)) {
289 if ((inargv
&& verbose
>= 0) || verbose
> 0)
290 fprintf(stderr
, Name
": %s requires wrong number of drives.\n",
295 if (tst
== NULL
|| super
== NULL
)
297 if (update
== NULL
&&
298 tst
->ss
->match_home(super
, homehost
)==0) {
299 if ((inargv
&& verbose
>= 0) || verbose
> 0)
300 fprintf(stderr
, Name
": %s is not built for host %s.\n",
302 /* Auto-assemble, and this is not a usable host */
303 /* if update != NULL, we are updating the host
308 /* If we are this far, then we are nearly commited to this device.
309 * If the super_block doesn't exist, or doesn't match others,
310 * then we probably cannot continue
311 * However if one of the arrays is for the homehost, and
312 * the other isn't that can disambiguate.
316 fprintf(stderr
, Name
": %s has no superblock - assembly aborted\n",
324 if (st
->ss
!= tst
->ss
||
325 st
->minor_version
!= tst
->minor_version
||
326 st
->ss
->compare_super(&first_super
, super
) != 0) {
327 /* Some mismatch. If exactly one array matches this host,
328 * we can resolve on that one.
329 * Or, if we are auto assembling, we just ignore the second
335 int first
= st
->ss
->match_home(first_super
, homehost
);
336 int last
= tst
->ss
->match_home(super
, homehost
);
337 if (first
+last
== 1) {
338 /* We can do something */
339 if (first
) {/* just ignore this one */
340 if ((inargv
&& verbose
>= 0) || verbose
> 0)
341 fprintf(stderr
, Name
": %s misses out due to wrong homehost\n",
344 } else { /* reject all those sofar */
346 if ((inargv
&& verbose
>= 0) || verbose
> 0)
347 fprintf(stderr
, Name
": %s overrides previous devices due to good homehost\n",
349 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
357 fprintf(stderr
, Name
": superblock on %s doesn't match others - assembly aborted\n",
368 /* So... it is up to me to open the device.
369 * We create a name '/dev/md/XXX' based on the info in the
370 * superblock, and call open_mddev on that
372 mdu_array_info_t inf
;
377 st
->ss
->getinfo_super(&info
, first_super
);
378 c
= strchr(info
.name
, ':');
379 if (c
) c
++; else c
= info
.name
;
380 if (isdigit(*c
) && ((ident
->autof
& 7)==4 || (ident
->autof
&7)==6))
381 /* /dev/md/d0 style for partitionable */
382 asprintf(&mddev
, "/dev/md/d%s", c
);
384 asprintf(&mddev
, "/dev/md/%s", c
);
385 mdfd
= open_mddev(mddev
, ident
->autof
);
388 vers
= md_get_version(mdfd
);
389 if (ioctl(mdfd
, GET_ARRAY_INFO
, &inf
)==0) {
390 fprintf(stderr
, Name
": %s already active, cannot restart it!\n", mddev
);
398 /* Ok, no bad inconsistancy, we can try updating etc */
399 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) if (tmpdev
->used
== 1) {
400 char *devname
= tmpdev
->devname
;
402 /* looks like a good enough match to update the super block if needed */
406 /* prepare useful information in info structures */
410 if (strcmp(update
, "uuid")==0 &&
413 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
414 read(rfd
, ident
->uuid
, 16) != 16) {
415 *(__u32
*)(ident
->uuid
) = random();
416 *(__u32
*)(ident
->uuid
+1) = random();
417 *(__u32
*)(ident
->uuid
+2) = random();
418 *(__u32
*)(ident
->uuid
+3) = random();
420 if (rfd
>= 0) close(rfd
);
422 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
429 st
->ss
->load_super(st
, dfd
, &super
, NULL
);
430 st
->ss
->getinfo_super(&info
, super
);
432 memcpy(info
.uuid
, ident
->uuid
, 16);
433 strcpy(info
.name
, ident
->name
);
434 info
.array
.md_minor
= minor(stb2
.st_rdev
);
436 st
->ss
->update_super(&info
, super
, update
, devname
, verbose
,
437 ident
->uuid_set
, homehost
);
438 if (strcmp(update
, "uuid")==0 &&
441 memcpy(ident
->uuid
, info
.uuid
, 16);
444 fprintf(stderr
, Name
": Cannot open %s for superblock update\n",
446 else if (st
->ss
->store_super(st
, dfd
, super
))
447 fprintf(stderr
, Name
": Could not re-write superblock on %s.\n",
452 if (strcmp(update
, "uuid")==0 &&
454 if (bitmap_update_uuid(ident
->bitmap_fd
, info
.uuid
) != 0)
455 fprintf(stderr
, Name
": Could not update uuid on %s.\n",
461 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
468 st
->ss
->load_super(st
, dfd
, &super
, NULL
);
469 st
->ss
->getinfo_super(&info
, super
);
476 fprintf(stderr
, Name
": %s is identified as a member of %s, slot %d.\n",
477 devname
, mddev
, info
.disk
.raid_disk
);
478 devices
[devcnt
].devname
= devname
;
479 devices
[devcnt
].major
= major(stb
.st_rdev
);
480 devices
[devcnt
].minor
= minor(stb
.st_rdev
);
481 devices
[devcnt
].oldmajor
= info
.disk
.major
;
482 devices
[devcnt
].oldminor
= info
.disk
.minor
;
483 devices
[devcnt
].events
= info
.events
;
484 devices
[devcnt
].raid_disk
= info
.disk
.raid_disk
;
485 devices
[devcnt
].disk_nr
= info
.disk
.number
;
486 devices
[devcnt
].uptodate
= 0;
487 devices
[devcnt
].state
= info
.disk
.state
;
488 if (most_recent
< devcnt
) {
489 if (devices
[devcnt
].events
490 > devices
[most_recent
].events
)
491 most_recent
= devcnt
;
493 if (info
.array
.level
== -4)
494 /* with multipath, the raid_disk from the superblock is meaningless */
497 i
= devices
[devcnt
].raid_disk
;
499 if (nextspare
< info
.array
.raid_disks
)
500 nextspare
= info
.array
.raid_disks
;
503 if (i
>= info
.array
.raid_disks
&&
509 unsigned int newbestcnt
= i
+10;
510 int *newbest
= malloc(sizeof(int)*newbestcnt
);
512 for (c
=0; c
< newbestcnt
; c
++)
514 newbest
[c
] = best
[c
];
519 bestcnt
= newbestcnt
;
522 devices
[best
[i
]].events
== devices
[devcnt
].events
&&
523 devices
[best
[i
]].minor
!= devices
[devcnt
].minor
&&
524 st
->ss
->major
== 0 &&
525 info
.array
.level
!= -4) {
526 /* two different devices with identical superblock.
527 * Could be a mis-detection caused by overlapping
528 * partitions. fail-safe.
530 fprintf(stderr
, Name
": WARNING %s and %s appear"
531 " to have very similar superblocks.\n"
532 " If they are really different, "
533 "please --zero the superblock on one\n"
534 " If they are the same, please remove "
535 "one from the list.\n",
536 devices
[best
[i
]].devname
, devname
);
537 if (must_close
) close(mdfd
);
541 || devices
[best
[i
]].events
< devices
[devcnt
].events
)
551 if (update
&& strcmp(update
, "byteorder")==0)
552 st
->minor_version
= 90;
555 fprintf(stderr
, Name
": no devices found for %s\n",
558 if (must_close
) close(mdfd
);
562 st
->ss
->getinfo_super(&info
, first_super
);
564 /* now we have some devices that might be suitable.
567 avail
= malloc(info
.array
.raid_disks
);
568 memset(avail
, 0, info
.array
.raid_disks
);
571 for (i
=0; i
< bestcnt
;i
++) {
573 int event_margin
= 1; /* always allow a difference of '1'
574 * like the kernel does
577 /* note: we ignore error flags in multipath arrays
578 * as they don't make sense
580 if (info
.array
.level
!= -4)
581 if (!(devices
[j
].state
& (1<<MD_DISK_SYNC
))) {
582 if (!(devices
[j
].state
& (1<<MD_DISK_FAULTY
)))
586 if (devices
[j
].events
+event_margin
>=
587 devices
[most_recent
].events
) {
588 devices
[j
].uptodate
= 1;
589 if (i
< info
.array
.raid_disks
) {
596 while (force
&& !enough(info
.array
.level
, info
.array
.raid_disks
,
599 /* Choose the newest best drive which is
600 * not up-to-date, update the superblock
605 for (i
=0; i
<info
.array
.raid_disks
&& i
< bestcnt
; i
++) {
608 !devices
[j
].uptodate
&&
609 devices
[j
].events
> 0 &&
611 devices
[j
].events
> devices
[chosen_drive
].events
))
614 if (chosen_drive
< 0)
617 fprintf(stderr
, Name
": forcing event count in %s(%d) from %d upto %d\n",
618 devices
[chosen_drive
].devname
, devices
[chosen_drive
].raid_disk
,
619 (int)(devices
[chosen_drive
].events
),
620 (int)(devices
[most_recent
].events
));
621 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
623 fprintf(stderr
, Name
": Couldn't open %s for write - not updating\n",
624 devices
[chosen_drive
].devname
);
625 devices
[chosen_drive
].events
= 0;
628 if (st
->ss
->load_super(st
,fd
, &super
, NULL
)) {
630 fprintf(stderr
, Name
": RAID superblock disappeared from %s - not updating.\n",
631 devices
[chosen_drive
].devname
);
632 devices
[chosen_drive
].events
= 0;
635 info
.events
= devices
[most_recent
].events
;
636 st
->ss
->update_super(&info
, super
, "force", devices
[chosen_drive
].devname
, verbose
, 0, NULL
);
638 if (st
->ss
->store_super(st
, fd
, super
)) {
640 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
641 devices
[chosen_drive
].devname
);
642 devices
[chosen_drive
].events
= 0;
647 devices
[chosen_drive
].events
= devices
[most_recent
].events
;
648 devices
[chosen_drive
].uptodate
= 1;
649 avail
[chosen_drive
] = 1;
654 /* Now we want to look at the superblock which the kernel will base things on
655 * and compare the devices that we think are working with the devices that the
656 * superblock thinks are working.
657 * If there are differences and --force is given, then update this chosen
662 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
++) {
668 if (!devices
[j
].uptodate
)
671 if ((fd
=dev_open(devices
[j
].devname
, O_RDONLY
|O_EXCL
))< 0) {
672 fprintf(stderr
, Name
": Cannot open %s: %s\n",
673 devices
[j
].devname
, strerror(errno
));
674 if (must_close
) close(mdfd
);
677 if (st
->ss
->load_super(st
,fd
, &super
, NULL
)) {
679 fprintf(stderr
, Name
": RAID superblock has disappeared from %s\n",
681 if (must_close
) close(mdfd
);
687 fprintf(stderr
, Name
": No suitable drives found for %s\n", mddev
);
688 if (must_close
) close(mdfd
);
691 st
->ss
->getinfo_super(&info
, super
);
692 for (i
=0; i
<bestcnt
; i
++) {
694 unsigned int desired_state
;
696 if (i
< info
.array
.raid_disks
)
697 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
703 if (!devices
[j
].uptodate
)
705 info
.disk
.number
= devices
[j
].disk_nr
;
706 info
.disk
.raid_disk
= i
;
707 info
.disk
.state
= desired_state
;
709 if (devices
[j
].uptodate
&&
710 st
->ss
->update_super(&info
, super
, "assemble", NULL
, verbose
, 0, NULL
)) {
713 fprintf(stderr
, Name
": "
714 "clearing FAULTY flag for device %d in %s for %s\n",
715 j
, mddev
, devices
[j
].devname
);
719 fprintf(stderr
, Name
": "
720 "device %d in %s has wrong state in superblock, but %s seems ok\n",
721 i
, mddev
, devices
[j
].devname
);
725 if (!devices
[j
].uptodate
&&
726 !(super
.disks
[i
].state
& (1 << MD_DISK_FAULTY
))) {
727 fprintf(stderr
, Name
": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
732 if (force
&& okcnt
== info
.array
.raid_disks
-1) {
733 /* FIXME check event count */
734 change
+= st
->ss
->update_super(&info
, super
, "force",
735 devices
[chosen_drive
].devname
, verbose
, 0, NULL
);
740 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
742 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
743 devices
[chosen_drive
].devname
);
744 if (must_close
) close(mdfd
);
747 if (st
->ss
->store_super(st
, fd
, super
)) {
749 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
750 devices
[chosen_drive
].devname
);
751 if (must_close
) close(mdfd
);
757 /* If we are in the middle of a reshape we may need to restore saved data
758 * that was moved aside due to the reshape overwriting live data
759 * The code of doing this lives in Grow.c
762 if (info
.reshape_active
) {
764 int *fdlist
= malloc(sizeof(int)* bestcnt
);
765 for (i
=0; i
<bestcnt
; i
++) {
768 fdlist
[i
] = dev_open(devices
[j
].devname
, O_RDWR
|O_EXCL
);
770 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
779 err
= Grow_restart(st
, &info
, fdlist
, bestcnt
, backup_file
);
782 if (fdlist
[i
]>=0) close(fdlist
[i
]);
785 fprintf(stderr
, Name
": Failed to restore critical section for reshape, sorry.\n");
786 if (must_close
) close(mdfd
);
791 /* count number of in-sync devices according to the superblock.
792 * We must have this number to start the array without -s or -R
794 req_cnt
= info
.array
.working_disks
;
796 /* Almost ready to actually *do* something */
799 if ((vers
% 100) >= 1) { /* can use different versions */
800 mdu_array_info_t inf
;
801 memset(&inf
, 0, sizeof(inf
));
802 inf
.major_version
= st
->ss
->major
;
803 inf
.minor_version
= st
->minor_version
;
804 rv
= ioctl(mdfd
, SET_ARRAY_INFO
, &inf
);
806 rv
= ioctl(mdfd
, SET_ARRAY_INFO
, NULL
);
809 fprintf(stderr
, Name
": SET_ARRAY_INFO failed for %s: %s\n",
810 mddev
, strerror(errno
));
811 if (must_close
) close(mdfd
);
814 if (ident
->bitmap_fd
>= 0) {
815 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
816 fprintf(stderr
, Name
": SET_BITMAP_FILE failed.\n");
817 if (must_close
) close(mdfd
);
820 } else if (ident
->bitmap_file
) {
821 /* From config file */
822 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
824 fprintf(stderr
, Name
": Could not open bitmap file %s\n",
826 if (must_close
) close(mdfd
);
829 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
830 fprintf(stderr
, Name
": Failed to set bitmapfile for %s\n", mddev
);
832 if (must_close
) close(mdfd
);
838 /* First, add the raid disks, but add the chosen one last */
839 for (i
=0; i
<= bestcnt
; i
++) {
843 if (j
== chosen_drive
)
848 if (j
>= 0 /* && devices[j].uptodate */) {
849 mdu_disk_info_t disk
;
850 memset(&disk
, 0, sizeof(disk
));
851 disk
.major
= devices
[j
].major
;
852 disk
.minor
= devices
[j
].minor
;
853 if (ioctl(mdfd
, ADD_NEW_DISK
, &disk
)!=0) {
854 fprintf(stderr
, Name
": failed to add %s to %s: %s\n",
858 if (i
< info
.array
.raid_disks
|| i
== bestcnt
)
862 } else if (verbose
> 0)
863 fprintf(stderr
, Name
": added %s to %s as %d\n",
864 devices
[j
].devname
, mddev
, devices
[j
].raid_disk
);
865 } else if (verbose
> 0 && i
< info
.array
.raid_disks
)
866 fprintf(stderr
, Name
": no uptodate device for slot %d of %s\n",
872 ( enough(info
.array
.level
, info
.array
.raid_disks
, info
.array
.layout
, avail
, okcnt
) &&
873 (okcnt
>= req_cnt
|| start_partial_ok
)
875 if (ioctl(mdfd
, RUN_ARRAY
, NULL
)==0) {
877 fprintf(stderr
, Name
": %s has been started with %d drive%s",
878 mddev
, okcnt
, okcnt
==1?"":"s");
879 if (okcnt
< info
.array
.raid_disks
)
880 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
882 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
883 fprintf(stderr
, ".\n");
888 /* There is a nasty race with 'mdadm --monitor'.
889 * If it opens this device before we close it,
890 * it gets an incomplete open on which IO
891 * doesn't work and the capacity if wrong.
892 * If we reopen (to check for layered devices)
893 * before --monitor closes, we loose.
895 * So: wait upto 1 second for there to be
896 * a non-zero capacity.
898 while (usecs
< 1000) {
899 mdfd
= open(mddev
, O_RDONLY
);
902 if (ioctl(mdfd
, BLKGETSIZE
, &size
) == 0 &&
913 fprintf(stderr
, Name
": failed to RUN_ARRAY %s: %s\n",
914 mddev
, strerror(errno
));
915 if (must_close
) close(mdfd
);
919 fprintf(stderr
, Name
": %s assembled from %d drive%s",
920 mddev
, okcnt
, okcnt
==1?"":"s");
921 if (okcnt
!= info
.array
.raid_disks
)
922 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
923 fprintf(stderr
, ", but not started.\n");
924 if (must_close
) close(mdfd
);
928 fprintf(stderr
, Name
": %s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
930 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
931 if (!enough(info
.array
.level
, info
.array
.raid_disks
, info
.array
.layout
, avail
, okcnt
))
932 fprintf(stderr
, " - not enough to start the array.\n");
934 if (req_cnt
== info
.array
.raid_disks
)
935 fprintf(stderr
, " - need all %d to start it", req_cnt
);
937 fprintf(stderr
, " - need %d of %d to start", req_cnt
, info
.array
.raid_disks
);
938 fprintf(stderr
, " (use --run to insist).\n");
941 if (must_close
) close(mdfd
);
944 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
945 * been updated to point to the current locations of devices.
946 * so we can just start the array
949 dev
= makedev(devices
[chosen_drive
].major
,
950 devices
[chosen_drive
].minor
);
951 if (ioctl(mdfd
, START_ARRAY
, dev
)) {
952 fprintf(stderr
, Name
": Cannot start array: %s\n",
957 if (must_close
) close(mdfd
);