]>
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 /*static */ int is_member_busy(char *metadata_version
)
55 /* check if the given member array is active */
56 struct mdstat_ent
*mdstat
= mdstat_read(1, 0);
57 struct mdstat_ent
*ent
;
60 for (ent
= mdstat
; ent
; ent
= ent
->next
) {
61 if (ent
->metadata_version
== NULL
)
63 if (strncmp(ent
->metadata_version
, "external:", 9) != 0)
65 if (!is_subarray(&ent
->metadata_version
[9]))
67 /* Skip first char - it can be '/' or '-' */
68 if (strcmp(&ent
->metadata_version
[10], metadata_version
+1) == 0) {
78 int Assemble(struct supertype
*st
, char *mddev
,
80 mddev_dev_t devlist
, char *backup_file
,
81 int readonly
, int runstop
,
82 char *update
, char *homehost
,
83 int verbose
, int force
)
86 * The task of Assemble is to find a collection of
87 * devices that should (according to their superblocks)
88 * form an array, and to give this collection to the MD driver.
89 * In Linux-2.4 and later, this involves submitting a
90 * SET_ARRAY_INFO ioctl with no arg - to prepare
91 * the array - and then submit a number of
92 * ADD_NEW_DISK ioctls to add disks into
93 * the array. Finally RUN_ARRAY might
94 * be submitted to start the array.
96 * Much of the work of Assemble is in finding and/or
97 * checking the disks to make sure they look right.
99 * If mddev is not set, then scan must be set and we
100 * read through the config file for dev+uuid mapping
101 * We recurse, setting mddev, for each device that
103 * - has a valid uuid (or any uuid if !uuidset)
105 * If mddev is set, we try to determine state of md.
106 * check version - must be at least 0.90.0
107 * check kernel version. must be at least 2.4.
108 * If not, we can possibly fall back on START_ARRAY
109 * Try to GET_ARRAY_INFO.
110 * If possible, give up
111 * If not, try to STOP_ARRAY just to make sure
113 * If !uuidset and scan, look in conf-file for uuid
114 * If not found, give up
115 * If !devlist and scan and uuidset, get list of devs from conf-file
118 * Check superblock - discard if bad
119 * Check uuid (set if we don't have one) - discard if no match
120 * Check superblock similarity if we have a superblock - discard if different
121 * Record events, devicenum
122 * This should give us a list of devices for the array
123 * We should collect the most recent event number
125 * Count disks with recent enough event count
126 * While force && !enough disks
127 * Choose newest rejected disks, update event count
128 * mark clean and rewrite superblock
131 * foreach device with recent events : ADD_NEW_DISK
132 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
134 * Check the device numbers in superblock are right
135 * update superblock if any changes
141 int auto_assem
= (mddev
== NULL
);
143 int vers
= vers
; /* Keep gcc quite - it really is initialised */
146 int uptodate
; /* set once we decide that this device is as
147 * recent as everything else in the array.
151 int *best
= NULL
; /* indexed by raid_disk */
152 unsigned int bestcnt
= 0;
154 unsigned int okcnt
, sparecnt
;
155 unsigned int req_cnt
;
162 int start_partial_ok
= (runstop
>= 0) &&
163 (force
|| devlist
==NULL
|| auto_assem
);
164 unsigned int num_devs
;
167 struct mdinfo
*content
= NULL
;
168 mdu_array_info_t tmp_inf
;
173 char chosen_name
[1024];
175 if (get_linux_version() < 2004000)
179 * If any subdevs are listed, then any that don't
180 * match ident are discarded. Remainder must all match and
182 * If no subdevs, then we scan all devices in the config file, but
183 * there must be something in the identity
187 ident
->uuid_set
== 0 &&
188 ident
->super_minor
< 0 &&
189 ident
->devices
== NULL
) {
190 fprintf(stderr
, Name
": No identity information available for %s - cannot assemble.\n",
191 mddev
? mddev
: "further assembly");
196 devlist
= conf_get_devs();
201 /* We come back here when doing auto-assembly and attempting some
202 * set of devices failed. Those are now marked as ->used==2 and
203 * we ignore them and try again
206 tmpdev
= devlist
; num_devs
= 0;
212 tmpdev
= tmpdev
->next
;
214 devices
= malloc(num_devs
* sizeof(*devices
));
216 if (!st
&& ident
->st
) st
= ident
->st
;
219 fprintf(stderr
, Name
": looking for devices for %s\n",
220 mddev
? mddev
: "further assembly");
222 /* first walk the list of devices to find a consistent set
223 * that match the criterea, if that is possible.
224 * We flag the ones we like with 'used'.
226 for (tmpdev
= devlist
;
228 tmpdev
= tmpdev
->next
) {
229 char *devname
= tmpdev
->devname
;
232 struct supertype
*tst
= dup_super(st
);
234 if (tmpdev
->used
> 1) continue;
236 if (ident
->devices
&&
237 !match_oneof(ident
->devices
, devname
)) {
238 if ((inargv
&& verbose
>=0) || verbose
> 0)
239 fprintf(stderr
, Name
": %s is not one of %s\n", devname
, ident
->devices
);
243 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
245 if ((inargv
&& verbose
>= 0) || verbose
> 0)
246 fprintf(stderr
, Name
": cannot open device %s: %s\n",
247 devname
, strerror(errno
));
249 } else if (fstat(dfd
, &stb
)< 0) {
251 fprintf(stderr
, Name
": fstat failed for %s: %s\n",
252 devname
, strerror(errno
));
254 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
255 fprintf(stderr
, Name
": %s is not a block device.\n",
258 } else if (!tst
&& (tst
= guess_super(dfd
)) == NULL
) {
259 if ((inargv
&& verbose
>= 0) || verbose
> 0)
260 fprintf(stderr
, Name
": no recogniseable superblock on %s\n",
263 } else if (tst
->ss
->load_super(tst
,dfd
, NULL
)) {
264 if ((inargv
&& verbose
>= 0) || verbose
> 0)
265 fprintf( stderr
, Name
": no RAID superblock on %s\n",
269 memset(content
, 0, sizeof(*content
));
270 tst
->ss
->getinfo_super(tst
, content
);
272 if (dfd
>= 0) close(dfd
);
274 if (ident
->uuid_set
&& (!update
|| strcmp(update
, "uuid")!= 0) &&
276 same_uuid(content
->uuid
, ident
->uuid
, tst
->ss
->swapuuid
)==0)) {
277 if ((inargv
&& verbose
>= 0) || verbose
> 0)
278 fprintf(stderr
, Name
": %s has wrong uuid.\n",
282 if (ident
->name
[0] && (!update
|| strcmp(update
, "name")!= 0) &&
284 name_matches(content
->name
, ident
->name
, homehost
)==0)) {
285 if ((inargv
&& verbose
>= 0) || verbose
> 0)
286 fprintf(stderr
, Name
": %s has wrong name.\n",
290 if (ident
->super_minor
!= UnSet
&&
292 ident
->super_minor
!= content
->array
.md_minor
)) {
293 if ((inargv
&& verbose
>= 0) || verbose
> 0)
294 fprintf(stderr
, Name
": %s has wrong super-minor.\n",
298 if (ident
->level
!= UnSet
&&
300 ident
->level
!= content
->array
.level
)) {
301 if ((inargv
&& verbose
>= 0) || verbose
> 0)
302 fprintf(stderr
, Name
": %s has wrong raid level.\n",
306 if (ident
->raid_disks
!= UnSet
&&
308 ident
->raid_disks
!= content
->array
.raid_disks
)) {
309 if ((inargv
&& verbose
>= 0) || verbose
> 0)
310 fprintf(stderr
, Name
": %s requires wrong number of drives.\n",
315 if (tst
== NULL
|| tst
->sb
== NULL
)
318 /* If we are this far, then we are nearly commited to this device.
319 * If the super_block doesn't exist, or doesn't match others,
320 * then we probably cannot continue
321 * However if one of the arrays is for the homehost, and
322 * the other isn't that can disambiguate.
325 if (!tst
|| !tst
->sb
) {
326 fprintf(stderr
, Name
": %s has no superblock - assembly aborted\n",
329 st
->ss
->free_super(st
);
335 if (st
->minor_version
== -1)
336 st
->minor_version
= tst
->minor_version
;
337 if (st
->ss
!= tst
->ss
||
338 st
->minor_version
!= tst
->minor_version
||
339 st
->ss
->compare_super(st
, tst
) != 0) {
340 /* Some mismatch. If exactly one array matches this host,
341 * we can resolve on that one.
342 * Or, if we are auto assembling, we just ignore the second
348 int first
= st
->ss
->match_home(st
, homehost
);
349 int last
= tst
->ss
->match_home(tst
, homehost
);
351 (first
== 1 || last
== 1)) {
352 /* We can do something */
353 if (first
) {/* just ignore this one */
354 if ((inargv
&& verbose
>= 0) || verbose
> 0)
355 fprintf(stderr
, Name
": %s misses out due to wrong homehost\n",
358 } else { /* reject all those sofar */
360 if ((inargv
&& verbose
>= 0) || verbose
> 0)
361 fprintf(stderr
, Name
": %s overrides previous devices due to good homehost\n",
363 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
371 fprintf(stderr
, Name
": superblock on %s doesn't match others - assembly aborted\n",
373 tst
->ss
->free_super(tst
);
374 st
->ss
->free_super(st
);
382 tst
->ss
->free_super(tst
);
385 if (!st
|| !st
->sb
|| !content
)
388 /* Now need to open array the device. Use create_mddev */
389 if (content
== &info
)
390 st
->ss
->getinfo_super(st
, content
);
392 trustworthy
= FOREIGN
;
393 switch (st
->ss
->match_home(st
, homehost
)) {
395 trustworthy
= FOREIGN
;
396 name
= content
->name
;
400 name
= strchr(content
->name
, ':');
404 name
= content
->name
;
407 trustworthy
= FOREIGN
;
410 if (!auto_assem
&& trustworthy
== FOREIGN
)
411 /* If the array is listed in mdadm or on
412 * command line, then we trust the name
413 * even if the array doesn't look local
417 if (content
->name
[0] == 0 &&
418 content
->array
.level
== LEVEL_CONTAINER
) {
419 name
= content
->text_version
;
420 trustworthy
= METADATA
;
422 mdfd
= create_mddev(mddev
, name
, ident
->autof
, trustworthy
,
425 st
->ss
->free_super(st
);
432 vers
= md_get_version(mdfd
);
434 fprintf(stderr
, Name
": Assemble requires driver version 0.90.0 or later.\n"
435 " Upgrade your kernel or try --build\n");
439 if (ioctl(mdfd
, GET_ARRAY_INFO
, &tmp_inf
)==0) {
440 fprintf(stderr
, Name
": %s already active, cannot restart it!\n",
442 for (tmpdev
= devlist
;
443 tmpdev
&& tmpdev
->used
!= 1;
444 tmpdev
= tmpdev
->next
)
446 if (tmpdev
&& auto_assem
)
447 fprintf(stderr
, Name
": %s needed for %s...\n",
448 mddev
, tmpdev
->devname
);
451 st
->ss
->free_super(st
);
457 ioctl(mdfd
, STOP_ARRAY
, NULL
); /* just incase it was started but has no content */
459 /* Ok, no bad inconsistancy, we can try updating etc */
461 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) if (tmpdev
->used
== 1) {
462 char *devname
= tmpdev
->devname
;
464 /* looks like a good enough match to update the super block if needed */
468 /* prepare useful information in info structures */
470 struct supertype
*tst
;
473 if (strcmp(update
, "uuid")==0 &&
476 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
477 read(rfd
, ident
->uuid
, 16) != 16) {
478 *(__u32
*)(ident
->uuid
) = random();
479 *(__u32
*)(ident
->uuid
+1) = random();
480 *(__u32
*)(ident
->uuid
+2) = random();
481 *(__u32
*)(ident
->uuid
+3) = random();
483 if (rfd
>= 0) close(rfd
);
485 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
487 remove_partitions(dfd
);
490 tst
->ss
->load_super(tst
, dfd
, NULL
);
491 tst
->ss
->getinfo_super(tst
, content
);
493 memcpy(content
->uuid
, ident
->uuid
, 16);
494 strcpy(content
->name
, ident
->name
);
495 content
->array
.md_minor
= minor(stb2
.st_rdev
);
497 tst
->ss
->update_super(tst
, content
, update
,
499 ident
->uuid_set
, homehost
);
500 if (strcmp(update
, "uuid")==0 &&
503 memcpy(ident
->uuid
, content
->uuid
, 16);
506 fprintf(stderr
, Name
": Cannot open %s for superblock update\n",
508 else if (tst
->ss
->store_super(tst
, dfd
))
509 fprintf(stderr
, Name
": Could not re-write superblock on %s.\n",
514 if (strcmp(update
, "uuid")==0 &&
515 ident
->bitmap_fd
>= 0 && !bitmap_done
) {
516 if (bitmap_update_uuid(ident
->bitmap_fd
,
518 tst
->ss
->swapuuid
) != 0)
519 fprintf(stderr
, Name
": Could not update uuid on external bitmap.\n");
523 tst
->ss
->free_super(tst
);
527 struct supertype
*tst
= dup_super(st
);
529 dfd
= dev_open(devname
, O_RDWR
|O_EXCL
);
531 remove_partitions(dfd
);
533 tst
->ss
->load_super(tst
, dfd
, NULL
);
534 tst
->ss
->getinfo_super(tst
, content
);
535 tst
->ss
->free_super(tst
);
542 fprintf(stderr
, Name
": %s is identified as a member of %s, slot %d.\n",
543 devname
, mddev
, content
->disk
.raid_disk
);
544 devices
[devcnt
].devname
= devname
;
545 devices
[devcnt
].uptodate
= 0;
546 devices
[devcnt
].i
= *content
;
547 devices
[devcnt
].i
.disk
.major
= major(stb
.st_rdev
);
548 devices
[devcnt
].i
.disk
.minor
= minor(stb
.st_rdev
);
549 if (most_recent
< devcnt
) {
550 if (devices
[devcnt
].i
.events
551 > devices
[most_recent
].i
.events
)
552 most_recent
= devcnt
;
554 if (content
->array
.level
== -4)
555 /* with multipath, the raid_disk from the superblock is meaningless */
558 i
= devices
[devcnt
].i
.disk
.raid_disk
;
560 if (nextspare
< content
->array
.raid_disks
)
561 nextspare
= content
->array
.raid_disks
;
564 if (i
>= content
->array
.raid_disks
&&
570 unsigned int newbestcnt
= i
+10;
571 int *newbest
= malloc(sizeof(int)*newbestcnt
);
573 for (c
=0; c
< newbestcnt
; c
++)
575 newbest
[c
] = best
[c
];
580 bestcnt
= newbestcnt
;
583 devices
[best
[i
]].i
.events
584 == devices
[devcnt
].i
.events
585 && (devices
[best
[i
]].i
.disk
.minor
586 != devices
[devcnt
].i
.disk
.minor
)
588 && content
->array
.level
!= LEVEL_MULTIPATH
) {
589 /* two different devices with identical superblock.
590 * Could be a mis-detection caused by overlapping
591 * partitions. fail-safe.
593 fprintf(stderr
, Name
": WARNING %s and %s appear"
594 " to have very similar superblocks.\n"
595 " If they are really different, "
596 "please --zero the superblock on one\n"
597 " If they are the same or overlap,"
598 " please remove one from %s.\n",
599 devices
[best
[i
]].devname
, devname
,
600 inargv
? "the list" :
601 "the\n DEVICE list in mdadm.conf"
607 || (devices
[best
[i
]].i
.events
608 < devices
[devcnt
].i
.events
))
615 fprintf(stderr
, Name
": no devices found for %s\n",
618 st
->ss
->free_super(st
);
623 if (update
&& strcmp(update
, "byteorder")==0)
624 st
->minor_version
= 90;
626 st
->ss
->getinfo_super(st
, content
);
627 clean
= content
->array
.state
& 1;
629 /* now we have some devices that might be suitable.
632 avail
= malloc(content
->array
.raid_disks
);
633 memset(avail
, 0, content
->array
.raid_disks
);
636 for (i
=0; i
< bestcnt
;i
++) {
638 int event_margin
= 1; /* always allow a difference of '1'
639 * like the kernel does
642 /* note: we ignore error flags in multipath arrays
643 * as they don't make sense
645 if (content
->array
.level
!= -4)
646 if (!(devices
[j
].i
.disk
.state
& (1<<MD_DISK_SYNC
))) {
647 if (!(devices
[j
].i
.disk
.state
648 & (1<<MD_DISK_FAULTY
)))
652 if (devices
[j
].i
.events
+event_margin
>=
653 devices
[most_recent
].i
.events
) {
654 devices
[j
].uptodate
= 1;
655 if (i
< content
->array
.raid_disks
) {
662 while (force
&& !enough(content
->array
.level
, content
->array
.raid_disks
,
663 content
->array
.layout
, 1,
665 /* Choose the newest best drive which is
666 * not up-to-date, update the superblock
670 struct supertype
*tst
;
671 long long current_events
;
673 for (i
=0; i
<content
->array
.raid_disks
&& i
< bestcnt
; i
++) {
676 !devices
[j
].uptodate
&&
677 devices
[j
].i
.events
> 0 &&
680 > devices
[chosen_drive
].i
.events
))
683 if (chosen_drive
< 0)
685 current_events
= devices
[chosen_drive
].i
.events
;
688 fprintf(stderr
, Name
": forcing event count in %s(%d) from %d upto %d\n",
689 devices
[chosen_drive
].devname
,
690 devices
[chosen_drive
].i
.disk
.raid_disk
,
691 (int)(devices
[chosen_drive
].i
.events
),
692 (int)(devices
[most_recent
].i
.events
));
693 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
695 fprintf(stderr
, Name
": Couldn't open %s for write - not updating\n",
696 devices
[chosen_drive
].devname
);
697 devices
[chosen_drive
].i
.events
= 0;
701 if (tst
->ss
->load_super(tst
,fd
, NULL
)) {
703 fprintf(stderr
, Name
": RAID superblock disappeared from %s - not updating.\n",
704 devices
[chosen_drive
].devname
);
705 devices
[chosen_drive
].i
.events
= 0;
708 content
->events
= devices
[most_recent
].i
.events
;
709 tst
->ss
->update_super(tst
, content
, "force-one",
710 devices
[chosen_drive
].devname
, verbose
,
713 if (tst
->ss
->store_super(tst
, fd
)) {
715 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
716 devices
[chosen_drive
].devname
);
717 devices
[chosen_drive
].i
.events
= 0;
718 tst
->ss
->free_super(tst
);
722 devices
[chosen_drive
].i
.events
= devices
[most_recent
].i
.events
;
723 devices
[chosen_drive
].uptodate
= 1;
724 avail
[chosen_drive
] = 1;
726 tst
->ss
->free_super(tst
);
728 /* If there are any other drives of the same vintage,
729 * add them in as well. We can't lose and we might gain
731 for (i
=0; i
<content
->array
.raid_disks
&& i
< bestcnt
; i
++) {
734 !devices
[j
].uptodate
&&
735 devices
[j
].i
.events
> 0 &&
736 devices
[j
].i
.events
== current_events
) {
743 /* Now we want to look at the superblock which the kernel will base things on
744 * and compare the devices that we think are working with the devices that the
745 * superblock thinks are working.
746 * If there are differences and --force is given, then update this chosen
750 st
->ss
->free_super(st
);
751 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
++) {
757 if (!devices
[j
].uptodate
)
760 if ((fd
=dev_open(devices
[j
].devname
, O_RDONLY
|O_EXCL
))< 0) {
761 fprintf(stderr
, Name
": Cannot open %s: %s\n",
762 devices
[j
].devname
, strerror(errno
));
766 if (st
->ss
->load_super(st
,fd
, NULL
)) {
768 fprintf(stderr
, Name
": RAID superblock has disappeared from %s\n",
775 if (st
->sb
== NULL
) {
776 fprintf(stderr
, Name
": No suitable drives found for %s\n", mddev
);
780 st
->ss
->getinfo_super(st
, content
);
782 sysfs_init(content
, mdfd
, 0);
784 for (i
=0; i
<bestcnt
; i
++) {
786 unsigned int desired_state
;
788 if (i
< content
->array
.raid_disks
)
789 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
795 if (!devices
[j
].uptodate
)
798 devices
[j
].i
.disk
.state
= desired_state
;
800 if (st
->ss
->update_super(st
, &devices
[j
].i
, "assemble", NULL
,
804 fprintf(stderr
, Name
": "
805 "clearing FAULTY flag for device %d in %s for %s\n",
806 j
, mddev
, devices
[j
].devname
);
810 fprintf(stderr
, Name
": "
811 "device %d in %s has wrong state in superblock, but %s seems ok\n",
812 i
, mddev
, devices
[j
].devname
);
816 if (!(super
.disks
[i
].i
.disk
.state
& (1 << MD_DISK_FAULTY
))) {
817 fprintf(stderr
, Name
": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
822 if (force
&& !clean
&&
823 !enough(content
->array
.level
, content
->array
.raid_disks
,
824 content
->array
.layout
, clean
,
826 change
+= st
->ss
->update_super(st
, content
, "force-array",
827 devices
[chosen_drive
].devname
, verbose
,
834 fd
= dev_open(devices
[chosen_drive
].devname
, O_RDWR
|O_EXCL
);
836 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
837 devices
[chosen_drive
].devname
);
841 if (st
->ss
->store_super(st
, fd
)) {
843 fprintf(stderr
, Name
": Could not re-write superblock on %s\n",
844 devices
[chosen_drive
].devname
);
851 /* If we are in the middle of a reshape we may need to restore saved data
852 * that was moved aside due to the reshape overwriting live data
853 * The code of doing this lives in Grow.c
856 if (content
->reshape_active
) {
858 int *fdlist
= malloc(sizeof(int)* bestcnt
);
859 for (i
=0; i
<bestcnt
; i
++) {
862 fdlist
[i
] = dev_open(devices
[j
].devname
, O_RDWR
|O_EXCL
);
864 fprintf(stderr
, Name
": Could not open %s for write - cannot Assemble array.\n",
873 err
= Grow_restart(st
, content
, fdlist
, bestcnt
, backup_file
);
876 if (fdlist
[i
]>=0) close(fdlist
[i
]);
879 fprintf(stderr
, Name
": Failed to restore critical section for reshape, sorry.\n");
885 /* count number of in-sync devices according to the superblock.
886 * We must have this number to start the array without -s or -R
888 req_cnt
= content
->array
.working_disks
;
890 /* Almost ready to actually *do* something */
894 /* First, fill in the map, so that udev can find our name
895 * as soon as we become active.
897 map_update(NULL
, fd2devnum(mdfd
), content
->text_version
,
898 content
->uuid
, chosen_name
);
900 rv
= set_array_info(mdfd
, st
, content
);
902 fprintf(stderr
, Name
": failed to set array info for %s: %s\n",
903 mddev
, strerror(errno
));
907 if (ident
->bitmap_fd
>= 0) {
908 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
909 fprintf(stderr
, Name
": SET_BITMAP_FILE failed.\n");
913 } else if (ident
->bitmap_file
) {
914 /* From config file */
915 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
917 fprintf(stderr
, Name
": Could not open bitmap file %s\n",
922 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
923 fprintf(stderr
, Name
": Failed to set bitmapfile for %s\n", mddev
);
931 /* First, add the raid disks, but add the chosen one last */
932 for (i
=0; i
<= bestcnt
; i
++) {
936 if (j
== chosen_drive
)
941 if (j
>= 0 /* && devices[j].uptodate */) {
942 rv
= add_disk(mdfd
, st
, content
, &devices
[j
].i
);
945 fprintf(stderr
, Name
": failed to add "
950 if (i
< content
->array
.raid_disks
955 } else if (verbose
> 0)
956 fprintf(stderr
, Name
": added %s "
958 devices
[j
].devname
, mddev
,
959 devices
[j
].i
.disk
.raid_disk
);
960 } else if (verbose
> 0 && i
< content
->array
.raid_disks
)
961 fprintf(stderr
, Name
": no uptodate device for "
966 if (content
->array
.level
== LEVEL_CONTAINER
) {
968 fprintf(stderr
, Name
": Container %s has been "
969 "assembled with %d drive%s",
970 mddev
, okcnt
+sparecnt
, okcnt
+sparecnt
==1?"":"s");
971 if (okcnt
< content
->array
.raid_disks
)
972 fprintf(stderr
, " (out of %d)",
973 content
->array
.raid_disks
);
974 fprintf(stderr
, "\n");
976 sysfs_uevent(content
, "change");
983 ( enough(content
->array
.level
, content
->array
.raid_disks
,
984 content
->array
.layout
, clean
, avail
, okcnt
) &&
985 (okcnt
>= req_cnt
|| start_partial_ok
)
987 if (ioctl(mdfd
, RUN_ARRAY
, NULL
)==0) {
989 fprintf(stderr
, Name
": %s has been started with %d drive%s",
990 mddev
, okcnt
, okcnt
==1?"":"s");
991 if (okcnt
< content
->array
.raid_disks
)
992 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
994 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
995 fprintf(stderr
, ".\n");
1000 /* There is a nasty race with 'mdadm --monitor'.
1001 * If it opens this device before we close it,
1002 * it gets an incomplete open on which IO
1003 * doesn't work and the capacity is
1005 * If we reopen (to check for layered devices)
1006 * before --monitor closes, we loose.
1008 * So: wait upto 1 second for there to be
1009 * a non-zero capacity.
1011 while (usecs
< 1000) {
1012 mdfd
= open(mddev
, O_RDONLY
);
1014 unsigned long long size
;
1015 if (get_dev_size(mdfd
, NULL
, &size
) &&
1026 fprintf(stderr
, Name
": failed to RUN_ARRAY %s: %s\n",
1027 mddev
, strerror(errno
));
1029 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1030 content
->array
.layout
, 1, avail
, okcnt
))
1031 fprintf(stderr
, Name
": Not enough devices to "
1032 "start the array.\n");
1033 else if (!enough(content
->array
.level
,
1034 content
->array
.raid_disks
,
1035 content
->array
.layout
, clean
,
1037 fprintf(stderr
, Name
": Not enough devices to "
1038 "start the array while not clean "
1039 "- consider --force.\n");
1042 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1046 if (runstop
== -1) {
1047 fprintf(stderr
, Name
": %s assembled from %d drive%s",
1048 mddev
, okcnt
, okcnt
==1?"":"s");
1049 if (okcnt
!= content
->array
.raid_disks
)
1050 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
1051 fprintf(stderr
, ", but not started.\n");
1055 if (verbose
>= -1) {
1056 fprintf(stderr
, Name
": %s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
1058 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1059 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1060 content
->array
.layout
, 1, avail
, okcnt
))
1061 fprintf(stderr
, " - not enough to start the array.\n");
1062 else if (!enough(content
->array
.level
,
1063 content
->array
.raid_disks
,
1064 content
->array
.layout
, clean
,
1066 fprintf(stderr
, " - not enough to start the "
1067 "array while not clean - consider "
1070 if (req_cnt
== content
->array
.raid_disks
)
1071 fprintf(stderr
, " - need all %d to start it", req_cnt
);
1073 fprintf(stderr
, " - need %d of %d to start", req_cnt
, content
->array
.raid_disks
);
1074 fprintf(stderr
, " (use --run to insist).\n");
1078 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1081 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1082 * been updated to point to the current locations of devices.
1083 * so we can just start the array
1086 dev
= makedev(devices
[chosen_drive
].i
.disk
.major
,
1087 devices
[chosen_drive
].i
.disk
.minor
);
1088 if (ioctl(mdfd
, START_ARRAY
, dev
)) {
1089 fprintf(stderr
, Name
": Cannot start array: %s\n",
1099 int assemble_container_content(struct supertype
*st
, int mdfd
,
1100 struct mdinfo
*content
, int runstop
,
1101 char *chosen_name
, int verbose
)
1103 struct mdinfo
*dev
, *sra
;
1104 int working
= 0, preexist
= 0;
1105 struct map_ent
*map
= NULL
;
1107 sysfs_init(content
, mdfd
, 0);
1109 sra
= sysfs_read(mdfd
, 0, GET_VERSION
);
1110 if (sra
== NULL
|| strcmp(sra
->text_version
, content
->text_version
) != 0)
1111 if (sysfs_set_array(content
, md_get_version(mdfd
)) != 0)
1116 for (dev
= content
->devs
; dev
; dev
= dev
->next
)
1117 if (sysfs_add_disk(content
, dev
) == 0)
1119 else if (errno
== EEXIST
)
1122 /* Nothing new, don't try to start */ ;
1123 else if (runstop
> 0 ||
1124 (working
+ preexist
) >= content
->array
.working_disks
) {
1125 switch(content
->array
.level
) {
1127 case LEVEL_MULTIPATH
:
1129 sysfs_set_str(content
, NULL
, "array_state",
1133 sysfs_set_str(content
, NULL
, "array_state",
1135 /* start mdmon if needed. */
1136 if (!mdmon_running(st
->container_dev
))
1137 start_mdmon(st
->container_dev
);
1138 ping_monitor(devnum2devname(st
->container_dev
));
1141 sysfs_set_safemode(content
, content
->safe_mode_delay
);
1143 fprintf(stderr
, Name
1144 ": Started %s with %d devices",
1145 chosen_name
, working
+ preexist
);
1147 fprintf(stderr
, " (%d new)", working
);
1148 fprintf(stderr
, "\n");
1150 /* FIXME should have an O_EXCL and wait for read-auto */
1153 fprintf(stderr
, Name
1154 ": %s assembled with %d devices but "
1156 chosen_name
, working
);
1157 map_update(&map
, fd2devnum(mdfd
),
1158 content
->text_version
,
1159 content
->uuid
, chosen_name
);