]>
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 if (get_linux_version() < 2004000)
147 vers
= md_get_version(mdfd
);
149 fprintf(stderr
, Name
": %s appears not to be an md device.\n", mddev
);
153 fprintf(stderr
, Name
": Assemble requires driver version 0.90.0 or later.\n"
154 " Upgrade your kernel or try --build\n");
158 if (ioctl(mdfd
, GET_ARRAY_INFO
, &info
.array
)>=0) {
159 fprintf(stderr
, Name
": device %s already active - cannot assemble it\n",
163 ioctl(mdfd
, STOP_ARRAY
, NULL
); /* just incase it was started but has no content */
166 * If any subdevs are listed, then any that don't
167 * match ident are discarded. Remainder must all match and
169 * If no subdevs, then we scan all devices in the config file, but
170 * there must be something in the identity
174 ident
->uuid_set
== 0 &&
175 ident
->super_minor
< 0 &&
176 ident
->devices
== NULL
) {
177 fprintf(stderr
, Name
": No identity information available for %s - cannot assemble.\n",
178 mddev
? mddev
: "further assembly");
182 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
= dup_super(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
);
225 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
227 if ((inargv
&& verbose
>= 0) || verbose
> 0)
228 fprintf(stderr
, Name
": cannot open device %s: %s\n",
229 devname
, strerror(errno
));
231 } else if (fstat(dfd
, &stb
)< 0) {
233 fprintf(stderr
, Name
": fstat failed for %s: %s\n",
234 devname
, strerror(errno
));
236 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
237 fprintf(stderr
, Name
": %s is not a block device.\n",
240 } else if (!tst
&& (tst
= guess_super(dfd
)) == NULL
) {
241 if ((inargv
&& verbose
>= 0) || verbose
> 0)
242 fprintf(stderr
, Name
": no recogniseable superblock on %s\n",
245 } else if (tst
->ss
->load_super(tst
,dfd
, NULL
)) {
246 if ((inargv
&& verbose
>= 0) || verbose
> 0)
247 fprintf( stderr
, Name
": no RAID superblock on %s\n",
250 tst
->ss
->getinfo_super(tst
, &info
);
252 if (dfd
>= 0) close(dfd
);
254 if (ident
->uuid_set
&& (!update
|| strcmp(update
, "uuid")!= 0) &&
256 same_uuid(info
.uuid
, ident
->uuid
, tst
->ss
->swapuuid
)==0)) {
257 if ((inargv
&& verbose
>= 0) || verbose
> 0)
258 fprintf(stderr
, Name
": %s has wrong uuid.\n",
262 if (ident
->name
[0] && (!update
|| strcmp(update
, "name")!= 0) &&
264 name_matches(info
.name
, ident
->name
, homehost
)==0)) {
265 if ((inargv
&& verbose
>= 0) || verbose
> 0)
266 fprintf(stderr
, Name
": %s has wrong name.\n",
270 if (ident
->super_minor
!= UnSet
&&
272 ident
->super_minor
!= info
.array
.md_minor
)) {
273 if ((inargv
&& verbose
>= 0) || verbose
> 0)
274 fprintf(stderr
, Name
": %s has wrong super-minor.\n",
278 if (ident
->level
!= UnSet
&&
280 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
&&
288 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
|| tst
->sb
== NULL
)
297 if (update
== NULL
&&
298 tst
->ss
->match_home(tst
, 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.
315 if (!tst
|| !tst
->sb
) {
316 fprintf(stderr
, Name
": %s has no superblock - assembly aborted\n",
319 st
->ss
->free_super(st
);
325 if (st
->minor_version
== -1)
326 st
->minor_version
= tst
->minor_version
;
327 if (st
->ss
!= tst
->ss
||
328 st
->minor_version
!= tst
->minor_version
||
329 st
->ss
->compare_super(st
, tst
) != 0) {
330 /* Some mismatch. If exactly one array matches this host,
331 * we can resolve on that one.
332 * Or, if we are auto assembling, we just ignore the second
338 int first
= st
->ss
->match_home(st
, homehost
);
339 int last
= tst
->ss
->match_home(tst
, homehost
);
340 if (first
+last
== 1) {
341 /* We can do something */
342 if (first
) {/* just ignore this one */
343 if ((inargv
&& verbose
>= 0) || verbose
> 0)
344 fprintf(stderr
, Name
": %s misses out due to wrong homehost\n",
347 } else { /* reject all those sofar */
349 if ((inargv
&& verbose
>= 0) || verbose
> 0)
350 fprintf(stderr
, Name
": %s overrides previous devices due to good homehost\n",
352 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
360 fprintf(stderr
, Name
": superblock on %s doesn't match others - assembly aborted\n",
362 tst
->ss
->free_super(tst
);
363 st
->ss
->free_super(st
);
370 tst
->ss
->free_super(tst
);
374 /* So... it is up to me to open the device.
375 * We create a name '/dev/md/XXX' based on the info in the
376 * superblock, and call open_mddev on that
378 mdu_array_info_t inf
;
383 st
->ss
->getinfo_super(st
, &info
);
384 c
= strchr(info
.name
, ':');
385 if (c
) c
++; else c
= info
.name
;
386 if (isdigit(*c
) && ((ident
->autof
& 7)==4 || (ident
->autof
&7)==6))
387 /* /dev/md/d0 style for partitionable */
388 asprintf(&mddev
, "/dev/md/d%s", c
);
390 asprintf(&mddev
, "/dev/md/%s", c
);
391 mdfd
= open_mddev(mddev
, ident
->autof
);
393 st
->ss
->free_super(st
);
397 vers
= md_get_version(mdfd
);
398 if (ioctl(mdfd
, GET_ARRAY_INFO
, &inf
)==0) {
399 for (tmpdev
= devlist
;
400 tmpdev
&& tmpdev
->used
!= 1;
401 tmpdev
= tmpdev
->next
)
403 fprintf(stderr
, Name
": %s already active, cannot restart it!\n", mddev
);
405 fprintf(stderr
, Name
": %s needed for %s...\n",
406 mddev
, tmpdev
->devname
);
409 st
->ss
->free_super(st
);
416 /* Ok, no bad inconsistancy, we can try updating etc */
418 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) if (tmpdev
->used
== 1) {
419 char *devname
= tmpdev
->devname
;
421 /* looks like a good enough match to update the super block if needed */
425 /* prepare useful information in info structures */
427 struct supertype
*tst
;
430 if (strcmp(update
, "uuid")==0 &&
433 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
434 read(rfd
, ident
->uuid
, 16) != 16) {
435 *(__u32
*)(ident
->uuid
) = random();
436 *(__u32
*)(ident
->uuid
+1) = random();
437 *(__u32
*)(ident
->uuid
+2) = random();
438 *(__u32
*)(ident
->uuid
+3) = random();
440 if (rfd
>= 0) close(rfd
);
442 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
444 remove_partitions(dfd
);
447 tst
->ss
->load_super(tst
, dfd
, NULL
);
448 tst
->ss
->getinfo_super(tst
, &info
);
450 memcpy(info
.uuid
, ident
->uuid
, 16);
451 strcpy(info
.name
, ident
->name
);
452 info
.array
.md_minor
= minor(stb2
.st_rdev
);
454 tst
->ss
->update_super(tst
, &info
, update
,
456 ident
->uuid_set
, homehost
);
457 if (strcmp(update
, "uuid")==0 &&
460 memcpy(ident
->uuid
, info
.uuid
, 16);
463 fprintf(stderr
, Name
": Cannot open %s for superblock update\n",
465 else if (tst
->ss
->store_super(tst
, dfd
))
466 fprintf(stderr
, Name
": Could not re-write superblock on %s.\n",
471 if (strcmp(update
, "uuid")==0 &&
472 ident
->bitmap_fd
>= 0 && !bitmap_done
) {
473 if (bitmap_update_uuid(ident
->bitmap_fd
,
475 tst
->ss
->swapuuid
) != 0)
476 fprintf(stderr
, Name
": Could not update uuid on external bitmap.\n");
480 tst
->ss
->free_super(tst
);
484 struct supertype
*tst
= dup_super(st
);;
486 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
488 remove_partitions(dfd
);
490 tst
->ss
->load_super(tst
, dfd
, NULL
);
491 tst
->ss
->getinfo_super(tst
, &info
);
492 tst
->ss
->free_super(tst
);
499 fprintf(stderr
, Name
": %s is identified as a member of %s, slot %d.\n",
500 devname
, mddev
, info
.disk
.raid_disk
);
501 devices
[devcnt
].devname
= devname
;
502 devices
[devcnt
].uptodate
= 0;
503 devices
[devcnt
].i
= info
;
504 devices
[devcnt
].i
.disk
.major
= major(stb
.st_rdev
);
505 devices
[devcnt
].i
.disk
.minor
= minor(stb
.st_rdev
);
506 if (most_recent
< devcnt
) {
507 if (devices
[devcnt
].i
.events
508 > devices
[most_recent
].i
.events
)
509 most_recent
= devcnt
;
511 if (info
.array
.level
== -4)
512 /* with multipath, the raid_disk from the superblock is meaningless */
515 i
= devices
[devcnt
].i
.disk
.raid_disk
;
517 if (nextspare
< info
.array
.raid_disks
)
518 nextspare
= info
.array
.raid_disks
;
521 if (i
>= info
.array
.raid_disks
&&
527 unsigned int newbestcnt
= i
+10;
528 int *newbest
= malloc(sizeof(int)*newbestcnt
);
530 for (c
=0; c
< newbestcnt
; c
++)
532 newbest
[c
] = best
[c
];
537 bestcnt
= newbestcnt
;
540 devices
[best
[i
]].i
.events
541 == devices
[devcnt
].i
.events
542 && (devices
[best
[i
]].i
.disk
.minor
543 != devices
[devcnt
].i
.disk
.minor
)
544 && st
->ss
->major
== 0
545 && info
.array
.level
!= -4) {
546 /* two different devices with identical superblock.
547 * Could be a mis-detection caused by overlapping
548 * partitions. fail-safe.
550 fprintf(stderr
, Name
": WARNING %s and %s appear"
551 " to have very similar superblocks.\n"
552 " If they are really different, "
553 "please --zero the superblock on one\n"
554 " If they are the same or overlap,"
555 " please remove one from %s.\n",
556 devices
[best
[i
]].devname
, devname
,
557 inargv
? "the list" :
558 "the\n DEVICE list in mdadm.conf"
560 if (must_close
) close(mdfd
);
564 || (devices
[best
[i
]].i
.events
565 < devices
[devcnt
].i
.events
))
571 if (update
&& strcmp(update
, "byteorder")==0)
572 st
->minor_version
= 90;
575 fprintf(stderr
, Name
": no devices found for %s\n",
577 st
->ss
->free_super(st
);
578 if (must_close
) close(mdfd
);
582 st
->ss
->getinfo_super(st
, &info
);
583 clean
= info
.array
.state
& 1;
585 /* now we have some devices that might be suitable.
588 avail
= malloc(info
.array
.raid_disks
);
589 memset(avail
, 0, info
.array
.raid_disks
);
592 for (i
=0; i
< bestcnt
;i
++) {
594 int event_margin
= 1; /* always allow a difference of '1'
595 * like the kernel does
598 /* note: we ignore error flags in multipath arrays
599 * as they don't make sense
601 if (info
.array
.level
!= -4)
602 if (!(devices
[j
].i
.disk
.state
& (1<<MD_DISK_SYNC
))) {
603 if (!(devices
[j
].i
.disk
.state
604 & (1<<MD_DISK_FAULTY
)))
608 if (devices
[j
].i
.events
+event_margin
>=
609 devices
[most_recent
].i
.events
) {
610 devices
[j
].uptodate
= 1;
611 if (i
< info
.array
.raid_disks
) {
618 while (force
&& !enough(info
.array
.level
, info
.array
.raid_disks
,
619 info
.array
.layout
, 1,
621 /* Choose the newest best drive which is
622 * not up-to-date, update the superblock
626 struct supertype
*tst
;
627 long long current_events
;
629 for (i
=0; i
<info
.array
.raid_disks
&& i
< bestcnt
; i
++) {
632 !devices
[j
].uptodate
&&
633 devices
[j
].i
.events
> 0 &&
636 > devices
[chosen_drive
].i
.events
))
639 if (chosen_drive
< 0)
641 current_events
= devices
[chosen_drive
].i
.events
;
644 fprintf(stderr
, Name
": forcing event count in %s(%d) from %d upto %d\n",
645 devices
[chosen_drive
].devname
,
646 devices
[chosen_drive
].i
.disk
.raid_disk
,
647 (int)(devices
[chosen_drive
].i
.events
),
648 (int)(devices
[most_recent
].i
.events
));
649 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
651 fprintf(stderr
, Name
": Couldn't open %s for write - not updating\n",
652 devices
[chosen_drive
].devname
);
653 devices
[chosen_drive
].i
.events
= 0;
657 if (tst
->ss
->load_super(st
,fd
, NULL
)) {
659 fprintf(stderr
, Name
": RAID superblock disappeared from %s - not updating.\n",
660 devices
[chosen_drive
].devname
);
661 devices
[chosen_drive
].i
.events
= 0;
664 info
.events
= devices
[most_recent
].i
.events
;
665 tst
->ss
->update_super(tst
, &info
, "force-one",
666 devices
[chosen_drive
].devname
, verbose
,
669 if (tst
->ss
->store_super(tst
, fd
)) {
671 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
672 devices
[chosen_drive
].devname
);
673 devices
[chosen_drive
].i
.events
= 0;
674 tst
->ss
->free_super(tst
);
678 devices
[chosen_drive
].i
.events
= devices
[most_recent
].i
.events
;
679 devices
[chosen_drive
].uptodate
= 1;
680 avail
[chosen_drive
] = 1;
682 tst
->ss
->free_super(tst
);
684 /* If there are any other drives of the same vintage,
685 * add them in as well. We can't lose and we might gain
687 for (i
=0; i
<info
.array
.raid_disks
&& i
< bestcnt
; i
++) {
690 !devices
[j
].uptodate
&&
691 devices
[j
].i
.events
> 0 &&
692 devices
[j
].i
.events
== current_events
) {
699 /* Now we want to look at the superblock which the kernel will base things on
700 * and compare the devices that we think are working with the devices that the
701 * superblock thinks are working.
702 * If there are differences and --force is given, then update this chosen
706 st
->ss
->free_super(st
);
707 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
++) {
713 if (!devices
[j
].uptodate
)
716 if ((fd
=dev_open(devices
[j
].devname
, O_RDONLY
|O_EXCL
))< 0) {
717 fprintf(stderr
, Name
": Cannot open %s: %s\n",
718 devices
[j
].devname
, strerror(errno
));
719 if (must_close
) close(mdfd
);
722 if (st
->ss
->load_super(st
,fd
, NULL
)) {
724 fprintf(stderr
, Name
": RAID superblock has disappeared from %s\n",
726 if (must_close
) close(mdfd
);
731 if (st
->sb
== NULL
) {
732 fprintf(stderr
, Name
": No suitable drives found for %s\n", mddev
);
733 if (must_close
) close(mdfd
);
736 st
->ss
->getinfo_super(st
, &info
);
737 for (i
=0; i
<bestcnt
; i
++) {
739 unsigned int desired_state
;
741 if (i
< info
.array
.raid_disks
)
742 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
748 if (!devices
[j
].uptodate
)
751 devices
[j
].i
.disk
.state
= desired_state
;
753 if (st
->ss
->update_super(st
, &devices
[j
].i
, "assemble", NULL
,
757 fprintf(stderr
, Name
": "
758 "clearing FAULTY flag for device %d in %s for %s\n",
759 j
, mddev
, devices
[j
].devname
);
763 fprintf(stderr
, Name
": "
764 "device %d in %s has wrong state in superblock, but %s seems ok\n",
765 i
, mddev
, devices
[j
].devname
);
769 if (!(super
.disks
[i
].i
.disk
.state
& (1 << MD_DISK_FAULTY
))) {
770 fprintf(stderr
, Name
": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
775 if (force
&& !clean
&&
776 !enough(info
.array
.level
, info
.array
.raid_disks
,
777 info
.array
.layout
, clean
,
779 change
+= st
->ss
->update_super(st
, &info
, "force-array",
780 devices
[chosen_drive
].devname
, verbose
,
787 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
789 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
790 devices
[chosen_drive
].devname
);
791 if (must_close
) close(mdfd
);
794 if (st
->ss
->store_super(st
, fd
)) {
796 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
797 devices
[chosen_drive
].devname
);
798 if (must_close
) close(mdfd
);
804 /* If we are in the middle of a reshape we may need to restore saved data
805 * that was moved aside due to the reshape overwriting live data
806 * The code of doing this lives in Grow.c
809 if (info
.reshape_active
) {
811 int *fdlist
= malloc(sizeof(int)* bestcnt
);
812 for (i
=0; i
<bestcnt
; i
++) {
815 fdlist
[i
] = dev_open(devices
[j
].devname
, O_RDWR
|O_EXCL
);
817 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
826 err
= Grow_restart(st
, &info
, fdlist
, bestcnt
, backup_file
);
829 if (fdlist
[i
]>=0) close(fdlist
[i
]);
832 fprintf(stderr
, Name
": Failed to restore critical section for reshape, sorry.\n");
833 if (must_close
) close(mdfd
);
838 /* count number of in-sync devices according to the superblock.
839 * We must have this number to start the array without -s or -R
841 req_cnt
= info
.array
.working_disks
;
843 /* Almost ready to actually *do* something */
849 if (st
->ss
->external
) {
851 strcat(strcpy(ver
, "external:"), st
->ss
->text_version
);
852 sra
= sysfs_read(mdfd
, 0, 0);
853 if ((vers
% 100) < 2 ||
855 sysfs_set_str(sra
, NULL
, "metadata_version",
857 fprintf(stderr
, Name
": This kernel does not "
858 "support external metadata.\n");
861 rv
= sysfs_set_array(sra
, &info
);
864 if ((vers
% 100) >= 1) { /* can use different versions */
865 mdu_array_info_t inf
;
866 memset(&inf
, 0, sizeof(inf
));
867 inf
.major_version
= st
->ss
->major
;
868 inf
.minor_version
= st
->minor_version
;
869 rv
= ioctl(mdfd
, SET_ARRAY_INFO
, &inf
);
871 rv
= ioctl(mdfd
, SET_ARRAY_INFO
, NULL
);
874 fprintf(stderr
, Name
": SET_ARRAY_INFO failed for %s: %s\n",
875 mddev
, strerror(errno
));
876 if (must_close
) close(mdfd
);
879 if (ident
->bitmap_fd
>= 0) {
880 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
881 fprintf(stderr
, Name
": SET_BITMAP_FILE failed.\n");
882 if (must_close
) close(mdfd
);
885 } else if (ident
->bitmap_file
) {
886 /* From config file */
887 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
889 fprintf(stderr
, Name
": Could not open bitmap file %s\n",
891 if (must_close
) close(mdfd
);
894 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
895 fprintf(stderr
, Name
": Failed to set bitmapfile for %s\n", mddev
);
897 if (must_close
) close(mdfd
);
903 /* First, add the raid disks, but add the chosen one last */
904 for (i
=0; i
<= bestcnt
; i
++) {
908 if (j
== chosen_drive
)
913 if (j
>= 0 /* && devices[j].uptodate */) {
915 if (st
->ss
->external
) {
916 int fd
= dev_open(devices
[j
].devname
,
921 devices
[j
].i
.disk
.number
=
922 devices
[j
].i
.disk
.raid_disk
;
923 st
->ss
->getinfo_super_n(st
,
925 rv
= sysfs_add_disk(sra
, fd
,
931 rv
= ioctl(mdfd
, ADD_NEW_DISK
,
934 fprintf(stderr
, Name
": failed to add "
939 if (i
< info
.array
.raid_disks
944 } else if (verbose
> 0)
945 fprintf(stderr
, Name
": added %s "
947 devices
[j
].devname
, mddev
,
948 devices
[j
].i
.disk
.raid_disk
);
949 } else if (verbose
> 0 && i
< info
.array
.raid_disks
)
950 fprintf(stderr
, Name
": no uptodate device for "
955 if (info
.array
.level
== LEVEL_CONTAINER
) {
957 fprintf(stderr
, Name
": Container %s has been "
958 "assembled with %d drive%s",
959 mddev
, okcnt
, okcnt
==1?"":"s");
960 if (okcnt
< info
.array
.raid_disks
)
961 fprintf(stderr
, " (out of %d)",
962 info
.array
.raid_disks
);
963 fprintf(stderr
, "\n");
972 ( enough(info
.array
.level
, info
.array
.raid_disks
,
973 info
.array
.layout
, clean
, avail
, okcnt
) &&
974 (okcnt
>= req_cnt
|| start_partial_ok
)
976 if (ioctl(mdfd
, RUN_ARRAY
, NULL
)==0) {
978 fprintf(stderr
, Name
": %s has been started with %d drive%s",
979 mddev
, okcnt
, okcnt
==1?"":"s");
980 if (okcnt
< info
.array
.raid_disks
)
981 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
983 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
984 fprintf(stderr
, ".\n");
989 /* There is a nasty race with 'mdadm --monitor'.
990 * If it opens this device before we close it,
991 * it gets an incomplete open on which IO
992 * doesn't work and the capacity is
994 * If we reopen (to check for layered devices)
995 * before --monitor closes, we loose.
997 * So: wait upto 1 second for there to be
998 * a non-zero capacity.
1000 while (usecs
< 1000) {
1001 mdfd
= open(mddev
, O_RDONLY
);
1003 unsigned long long size
;
1004 if (get_dev_size(mdfd
, NULL
, &size
) &&
1015 fprintf(stderr
, Name
": failed to RUN_ARRAY %s: %s\n",
1016 mddev
, strerror(errno
));
1018 if (!enough(info
.array
.level
, info
.array
.raid_disks
,
1019 info
.array
.layout
, 1, avail
, okcnt
))
1020 fprintf(stderr
, Name
": Not enough devices to "
1021 "start the array.\n");
1022 else if (!enough(info
.array
.level
,
1023 info
.array
.raid_disks
,
1024 info
.array
.layout
, clean
,
1026 fprintf(stderr
, Name
": Not enough devices to "
1027 "start the array while not clean "
1028 "- consider --force.\n");
1030 if (must_close
) close(mdfd
);
1033 if (runstop
== -1) {
1034 fprintf(stderr
, Name
": %s assembled from %d drive%s",
1035 mddev
, okcnt
, okcnt
==1?"":"s");
1036 if (okcnt
!= info
.array
.raid_disks
)
1037 fprintf(stderr
, " (out of %d)", info
.array
.raid_disks
);
1038 fprintf(stderr
, ", but not started.\n");
1039 if (must_close
) close(mdfd
);
1042 if (verbose
>= -1) {
1043 fprintf(stderr
, Name
": %s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
1045 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1046 if (!enough(info
.array
.level
, info
.array
.raid_disks
,
1047 info
.array
.layout
, 1, avail
, okcnt
))
1048 fprintf(stderr
, " - not enough to start the array.\n");
1049 else if (!enough(info
.array
.level
,
1050 info
.array
.raid_disks
,
1051 info
.array
.layout
, clean
,
1053 fprintf(stderr
, " - not enough to start the "
1054 "array while not clean - consider "
1057 if (req_cnt
== info
.array
.raid_disks
)
1058 fprintf(stderr
, " - need all %d to start it", req_cnt
);
1060 fprintf(stderr
, " - need %d of %d to start", req_cnt
, info
.array
.raid_disks
);
1061 fprintf(stderr
, " (use --run to insist).\n");
1064 if (must_close
) close(mdfd
);
1067 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1068 * been updated to point to the current locations of devices.
1069 * so we can just start the array
1072 dev
= makedev(devices
[chosen_drive
].i
.disk
.major
,
1073 devices
[chosen_drive
].i
.disk
.minor
);
1074 if (ioctl(mdfd
, START_ARRAY
, dev
)) {
1075 fprintf(stderr
, Name
": Cannot start array: %s\n",
1080 if (must_close
) close(mdfd
);