2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2013 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@suse.de>
28 static int name_matches(char *found
, char *required
, char *homehost
)
30 /* See if the name found matches the required name, possibly
31 * prefixed with 'homehost'
35 strncpy(fnd
, found
, 32);
37 if (strcmp(found
, required
)==0)
40 int l
= strlen(homehost
);
41 if (l
< 32 && fnd
[l
] == ':' &&
42 strcmp(fnd
+l
+1, required
)==0)
48 static int is_member_busy(char *metadata_version
)
50 /* check if the given member array is active */
51 struct mdstat_ent
*mdstat
= mdstat_read(0, 0);
52 struct mdstat_ent
*ent
;
55 for (ent
= mdstat
; ent
; ent
= ent
->next
) {
56 if (ent
->metadata_version
== NULL
)
58 if (strncmp(ent
->metadata_version
, "external:", 9) != 0)
60 if (!is_subarray(&ent
->metadata_version
[9]))
62 /* Skip first char - it can be '/' or '-' */
63 if (strcmp(&ent
->metadata_version
[10], metadata_version
+1) == 0) {
73 static int ident_matches(struct mddev_ident
*ident
,
74 struct mdinfo
*content
,
75 struct supertype
*tst
,
77 char *update
, char *devname
)
80 if (ident
->uuid_set
&& (!update
|| strcmp(update
, "uuid")!= 0) &&
81 same_uuid(content
->uuid
, ident
->uuid
, tst
->ss
->swapuuid
)==0 &&
82 memcmp(content
->uuid
, uuid_zero
, sizeof(int[4])) != 0) {
84 pr_err("%s has wrong uuid.\n", devname
);
87 if (ident
->name
[0] && (!update
|| strcmp(update
, "name")!= 0) &&
88 name_matches(content
->name
, ident
->name
, homehost
)==0) {
90 pr_err("%s has wrong name.\n", devname
);
93 if (ident
->super_minor
!= UnSet
&&
94 ident
->super_minor
!= content
->array
.md_minor
) {
96 pr_err("%s has wrong super-minor.\n",
100 if (ident
->level
!= UnSet
&&
101 ident
->level
!= content
->array
.level
) {
103 pr_err("%s has wrong raid level.\n",
107 if (ident
->raid_disks
!= UnSet
&&
108 content
->array
.raid_disks
!= 0 && /* metadata doesn't know how many to expect */
109 ident
->raid_disks
!= content
->array
.raid_disks
) {
111 pr_err("%s requires wrong number of drives.\n",
115 if (ident
->member
&& ident
->member
[0]) {
116 /* content->text_version must match */
117 char *s
= strchr(content
->text_version
+1, '/');
120 pr_err("%s is not a container and one is required.\n",
123 } else if (strcmp(ident
->member
, s
+1) != 0) {
125 pr_err("skipping wrong member %s is %s\n",
126 content
->text_version
, devname
);
133 static int select_devices(struct mddev_dev
*devlist
,
134 struct mddev_ident
*ident
,
135 struct supertype
**stp
,
136 struct mdinfo
**contentp
,
138 int inargv
, int auto_assem
)
140 struct mddev_dev
*tmpdev
;
142 struct supertype
*st
= *stp
;
143 struct mdinfo
*content
= NULL
;
144 int report_mismatch
= ((inargv
&& c
->verbose
>= 0) || c
->verbose
> 0);
145 struct domainlist
*domains
= NULL
;
147 tmpdev
= devlist
; num_devs
= 0;
153 tmpdev
->disposition
= 0;
154 tmpdev
= tmpdev
->next
;
157 /* first walk the list of devices to find a consistent set
158 * that match the criterea, if that is possible.
159 * We flag the ones we like with 'used'.
161 for (tmpdev
= devlist
;
163 tmpdev
= tmpdev
? tmpdev
->next
: NULL
) {
164 char *devname
= tmpdev
->devname
;
167 struct supertype
*tst
;
168 struct dev_policy
*pol
= NULL
;
169 int found_container
= 0;
171 if (tmpdev
->used
> 1)
174 if (ident
->container
) {
175 if (ident
->container
[0] == '/' &&
176 !same_dev(ident
->container
, devname
)) {
178 pr_err("%s is not the container required (%s)\n",
179 devname
, ident
->container
);
182 } else if (ident
->devices
&&
183 !match_oneof(ident
->devices
, devname
)) {
184 /* Note that we ignore the "device=" identifier if a
185 * "container=" is given. Checking both is unnecessarily
189 pr_err("%s is not one of %s\n", devname
, ident
->devices
);
195 dfd
= dev_open(devname
, O_RDONLY
);
198 pr_err("cannot open device %s: %s\n",
199 devname
, strerror(errno
));
201 } else if (fstat(dfd
, &stb
)< 0) {
203 pr_err("fstat failed for %s: %s\n",
204 devname
, strerror(errno
));
206 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
207 pr_err("%s is not a block device.\n",
210 } else if (must_be_container(dfd
)) {
212 /* already found some components, this cannot
216 pr_err("%s is a container, but we are looking for components\n",
219 #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO)
220 } if (!tst
&& (tst
= super_by_fd(dfd
, NULL
)) == NULL
) {
222 pr_err("not a recognisable container: %s\n",
226 } else if (!tst
->ss
->load_container
227 || tst
->ss
->load_container(tst
, dfd
, NULL
)) {
229 pr_err("no correct container type: %s\n",
232 } else if (auto_assem
&&
233 !conf_test_metadata(tst
->ss
->name
, (pol
= devid_policy(stb
.st_rdev
)),
234 tst
->ss
->match_home(tst
, c
->homehost
) == 1)) {
236 pr_err("%s has metadata type %s for which "
237 "auto-assembly is disabled\n",
238 devname
, tst
->ss
->name
);
243 if (!tst
&& (tst
= guess_super(dfd
)) == NULL
) {
245 pr_err("no recogniseable superblock on %s\n",
248 } else if (tst
->ss
->load_super(tst
,dfd
, NULL
)) {
250 pr_err("no RAID superblock on %s\n",
253 } else if (tst
->ss
->compare_super
== NULL
) {
255 pr_err("Cannot assemble %s metadata on %s\n",
256 tst
->ss
->name
, devname
);
258 } else if (auto_assem
&& st
== NULL
&&
259 !conf_test_metadata(tst
->ss
->name
, (pol
= devid_policy(stb
.st_rdev
)),
260 tst
->ss
->match_home(tst
, c
->homehost
) == 1)) {
262 pr_err("%s has metadata type %s for which "
263 "auto-assembly is disabled\n",
264 devname
, tst
->ss
->name
);
268 if (dfd
>= 0) close(dfd
);
269 if (tmpdev
->used
== 2) {
270 if (auto_assem
|| !inargv
)
271 /* Ignore unrecognised devices during auto-assembly */
273 if (ident
->uuid_set
|| ident
->name
[0] ||
274 ident
->super_minor
!= UnSet
)
275 /* Ignore unrecognised device if looking for
279 pr_err("%s has no superblock - assembly aborted\n",
282 st
->ss
->free_super(st
);
283 dev_policy_free(pol
);
284 domain_free(domains
);
288 if (found_container
) {
289 /* tmpdev is a container. We need to be either
290 * looking for a member, or auto-assembling
292 /* should be safe to try an exclusive open now, we
293 * have rejected anything that some other mdadm might
296 dfd
= dev_open(devname
, O_RDONLY
| O_EXCL
);
299 pr_err("%s is busy - skipping\n", devname
);
304 if (ident
->container
&& ident
->container
[0] != '/') {
309 tst
->ss
->getinfo_super(tst
, content
, NULL
);
311 if (!parse_uuid(ident
->container
, uuid
) ||
312 !same_uuid(content
->uuid
, uuid
, tst
->ss
->swapuuid
)) {
314 pr_err("%s has wrong UUID to be required container\n",
319 /* It is worth looking inside this container.
322 pr_err("looking in container %s\n",
325 for (content
= tst
->ss
->container_content(tst
, NULL
);
327 content
= content
->next
) {
329 if (!ident_matches(ident
, content
, tst
,
330 c
->homehost
, c
->update
,
331 report_mismatch
? devname
: NULL
))
332 /* message already printed */;
333 else if (is_member_busy(content
->text_version
)) {
335 pr_err("member %s in %s is already assembled\n",
336 content
->text_version
,
338 } else if (content
->array
.state
& (1<<MD_SB_BLOCK_VOLUME
)) {
339 /* do not assemble arrays with unsupported configurations */
340 pr_err("Cannot activate member %s in %s.\n",
341 content
->text_version
,
348 goto loop
; /* empty container */
351 st
= tst
; tst
= NULL
;
352 if (!auto_assem
&& inargv
&& tmpdev
->next
!= NULL
) {
353 pr_err("%s is a container, but is not "
354 "only device given: confused and aborting\n",
356 st
->ss
->free_super(st
);
357 dev_policy_free(pol
);
358 domain_free(domains
);
362 pr_err("found match on member %s in %s\n",
363 content
->text_version
, devname
);
365 /* make sure we finished the loop */
370 tst
->ss
->getinfo_super(tst
, content
, NULL
);
372 if (!ident_matches(ident
, content
, tst
,
373 c
->homehost
, c
->update
,
374 report_mismatch
? devname
: NULL
))
378 /* Never auto-assemble things that conflict
379 * with mdadm.conf in some way
381 struct mddev_ident
*match
;
384 match
= conf_match(tst
, content
, devname
,
385 report_mismatch
? c
->verbose
: -1,
387 if (!match
&& rv
== 2)
389 if (match
&& match
->devname
&&
390 strcasecmp(match
->devname
, "<ignore>") == 0) {
392 pr_err("%s is a member of an explicitly ignored array\n",
396 if (match
&& !ident_matches(match
, content
, tst
,
397 c
->homehost
, c
->update
,
398 report_mismatch
? devname
: NULL
))
399 /* Array exists in mdadm.conf but some
400 * details don't match, so reject it
405 /* should be safe to try an exclusive open now, we
406 * have rejected anything that some other mdadm might
409 dfd
= dev_open(devname
, O_RDONLY
| O_EXCL
);
412 pr_err("%s is busy - skipping\n", devname
);
419 if (st
->minor_version
== -1)
420 st
->minor_version
= tst
->minor_version
;
422 if (memcmp(content
->uuid
, uuid_zero
,
423 sizeof(int[4])) == 0) {
424 /* this is a floating spare. It cannot define
425 * an array unless there are no more arrays of
426 * this type to be found. It can be included
427 * in an array of this type though.
433 if (st
->ss
!= tst
->ss
||
434 st
->minor_version
!= tst
->minor_version
||
435 st
->ss
->compare_super(st
, tst
) != 0) {
436 /* Some mismatch. If exactly one array matches this host,
437 * we can resolve on that one.
438 * Or, if we are auto assembling, we just ignore the second
444 int first
= st
->ss
->match_home(st
, c
->homehost
);
445 int last
= tst
->ss
->match_home(tst
, c
->homehost
);
447 (first
== 1 || last
== 1)) {
448 /* We can do something */
449 if (first
) {/* just ignore this one */
451 pr_err("%s misses out due to wrong homehost\n",
454 } else { /* reject all those sofar */
455 struct mddev_dev
*td
;
457 pr_err("%s overrides previous devices due to good homehost\n",
459 for (td
=devlist
; td
!= tmpdev
; td
=td
->next
)
467 pr_err("superblock on %s doesn't match others - assembly aborted\n",
469 tst
->ss
->free_super(tst
);
470 st
->ss
->free_super(st
);
471 dev_policy_free(pol
);
472 domain_free(domains
);
478 /* Collect domain information from members only */
479 if (tmpdev
&& tmpdev
->used
== 1) {
481 pol
= devid_policy(stb
.st_rdev
);
482 domain_merge(&domains
, pol
, tst
?tst
->ss
->name
:NULL
);
484 dev_policy_free(pol
);
487 tst
->ss
->free_super(tst
);
490 /* Check if we found some imsm spares but no members */
493 memcmp(uuid_zero
, ident
->uuid
,sizeof(uuid_zero
)) == 0)) &&
495 for (tmpdev
= devlist
; tmpdev
; tmpdev
= tmpdev
->next
) {
496 if (tmpdev
->used
!= 3)
502 /* we need sb from one of the spares */
503 int dfd
= dev_open(tmpdev
->devname
, O_RDONLY
);
505 st
->ss
->load_super(st
, dfd
, NULL
))
512 /* Now reject spares that don't match domains of identified members */
513 for (tmpdev
= devlist
; tmpdev
; tmpdev
= tmpdev
->next
) {
515 if (tmpdev
->used
!= 3)
517 if (stat(tmpdev
->devname
, &stb
)< 0) {
518 pr_err("fstat failed for %s: %s\n",
519 tmpdev
->devname
, strerror(errno
));
522 struct dev_policy
*pol
= devid_policy(stb
.st_rdev
);
523 int dt
= domain_test(domains
, pol
, NULL
);
524 if (inargv
&& dt
!= 0)
525 /* take this spare as domains match
526 * if there are any */
528 else if (!inargv
&& dt
== 1)
529 /* device wasn't explicitly listed, so need
530 * explicit domain match - which we have */
533 /* if domains don't match mark as unused */
535 dev_policy_free(pol
);
538 domain_free(domains
);
540 if (st
&& st
->sb
&& content
== *contentp
)
541 st
->ss
->getinfo_super(st
, content
, NULL
);
549 int uptodate
; /* set once we decide that this device is as
550 * recent as everything else in the array.
552 int included
; /* set if the device is already in the array
553 * due to a previous '-I'
558 static int load_devices(struct devs
*devices
, char *devmap
,
559 struct mddev_ident
*ident
, struct supertype
**stp
,
560 struct mddev_dev
*devlist
, struct context
*c
,
561 struct mdinfo
*content
,
562 int mdfd
, char *mddev
,
563 int *most_recentp
, int *bestcntp
, int **bestp
,
566 struct mddev_dev
*tmpdev
;
572 int most_recent
= -1;
575 struct supertype
*st
= *stp
;
577 for (tmpdev
= devlist
; tmpdev
; tmpdev
=tmpdev
->next
) {
578 char *devname
= tmpdev
->devname
;
580 struct supertype
*tst
;
583 if (tmpdev
->used
!= 1)
585 /* looks like a good enough match to update the super block if needed */
589 /* prepare useful information in info structures */
594 if (strcmp(c
->update
, "uuid")==0 &&
597 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
598 read(rfd
, ident
->uuid
, 16) != 16) {
599 *(__u32
*)(ident
->uuid
) = random();
600 *(__u32
*)(ident
->uuid
+1) = random();
601 *(__u32
*)(ident
->uuid
+2) = random();
602 *(__u32
*)(ident
->uuid
+3) = random();
604 if (rfd
>= 0) close(rfd
);
606 dfd
= dev_open(devname
,
607 tmpdev
->disposition
== 'I'
608 ? O_RDWR
: (O_RDWR
|O_EXCL
));
611 if (dfd
< 0 || tst
->ss
->load_super(tst
, dfd
, NULL
) != 0) {
612 pr_err("cannot re-read metadata from %s - aborting\n",
619 tst
->ss
->free_super(tst
);
624 tst
->ss
->getinfo_super(tst
, content
, devmap
+ devcnt
* content
->array
.raid_disks
);
626 memcpy(content
->uuid
, ident
->uuid
, 16);
627 strcpy(content
->name
, ident
->name
);
628 content
->array
.md_minor
= minor(stb2
.st_rdev
);
630 if (strcmp(c
->update
, "byteorder") == 0)
633 err
= tst
->ss
->update_super(tst
, content
, c
->update
,
639 pr_err("--update=%s not understood"
640 " for %s metadata\n",
641 c
->update
, tst
->ss
->name
);
642 tst
->ss
->free_super(tst
);
651 if (strcmp(c
->update
, "uuid")==0 &&
654 memcpy(ident
->uuid
, content
->uuid
, 16);
656 if (tst
->ss
->store_super(tst
, dfd
))
657 pr_err("Could not re-write superblock on %s.\n",
661 if (strcmp(c
->update
, "uuid")==0 &&
662 ident
->bitmap_fd
>= 0 && !bitmap_done
) {
663 if (bitmap_update_uuid(ident
->bitmap_fd
,
665 tst
->ss
->swapuuid
) != 0)
666 pr_err("Could not update uuid on external bitmap.\n");
673 int dfd
= dev_open(devname
,
674 tmpdev
->disposition
== 'I'
675 ? O_RDWR
: (O_RDWR
|O_EXCL
));
678 if (dfd
< 0 || tst
->ss
->load_super(tst
, dfd
, NULL
) != 0) {
679 pr_err("cannot re-read metadata from %s - aborting\n",
686 tst
->ss
->free_super(tst
);
691 tst
->ss
->getinfo_super(tst
, content
, devmap
+ devcnt
* content
->array
.raid_disks
);
698 pr_err("%s is identified as a member of %s, slot %d%s.\n",
699 devname
, mddev
, content
->disk
.raid_disk
,
700 (content
->disk
.state
& (1<<MD_DISK_REPLACEMENT
)) ? " replacement":"");
701 devices
[devcnt
].devname
= devname
;
702 devices
[devcnt
].uptodate
= 0;
703 devices
[devcnt
].included
= (tmpdev
->disposition
== 'I');
704 devices
[devcnt
].i
= *content
;
705 devices
[devcnt
].i
.disk
.major
= major(stb
.st_rdev
);
706 devices
[devcnt
].i
.disk
.minor
= minor(stb
.st_rdev
);
708 if (devices
[devcnt
].i
.disk
.state
== 6) {
709 if (most_recent
< 0 ||
710 devices
[devcnt
].i
.events
711 > devices
[most_recent
].i
.events
) {
712 struct supertype
*tmp
= tst
;
715 most_recent
= devcnt
;
718 tst
->ss
->free_super(tst
);
721 if (content
->array
.level
== LEVEL_MULTIPATH
)
722 /* with multipath, the raid_disk from the superblock is meaningless */
725 i
= devices
[devcnt
].i
.disk
.raid_disk
;
727 if (nextspare
< content
->array
.raid_disks
*2)
728 nextspare
= content
->array
.raid_disks
*2;
731 /* i is raid_disk - double it so there is room for
734 if (devices
[devcnt
].i
.disk
.state
& (1<<MD_DISK_REPLACEMENT
))
736 if (i
>= content
->array
.raid_disks
*2 &&
742 int newbestcnt
= i
+10;
743 int *newbest
= xmalloc(sizeof(int)*newbestcnt
);
745 for (c
=0; c
< newbestcnt
; c
++)
747 newbest
[c
] = best
[c
];
752 bestcnt
= newbestcnt
;
755 devices
[best
[i
]].i
.events
756 == devices
[devcnt
].i
.events
757 && (devices
[best
[i
]].i
.disk
.minor
758 != devices
[devcnt
].i
.disk
.minor
)
760 && content
->array
.level
!= LEVEL_MULTIPATH
) {
761 /* two different devices with identical superblock.
762 * Could be a mis-detection caused by overlapping
763 * partitions. fail-safe.
765 pr_err("WARNING %s and %s appear"
766 " to have very similar superblocks.\n"
767 " If they are really different, "
768 "please --zero the superblock on one\n"
769 " If they are the same or overlap,"
770 " please remove one from %s.\n",
771 devices
[best
[i
]].devname
, devname
,
772 inargv
? "the list" :
773 "the\n DEVICE list in mdadm.conf"
782 || (devices
[best
[i
]].i
.events
783 < devices
[devcnt
].i
.events
))
788 if (most_recent
>= 0)
789 *most_recentp
= most_recent
;
796 static int force_array(struct mdinfo
*content
,
797 struct devs
*devices
,
798 int *best
, int bestcnt
, char *avail
,
800 struct supertype
*st
,
804 while (!enough(content
->array
.level
, content
->array
.raid_disks
,
805 content
->array
.layout
, 1,
808 (content
->reshape_active
&& content
->delta_disks
> 0 &&
809 !enough(content
->array
.level
, (content
->array
.raid_disks
810 - content
->delta_disks
),
811 content
->new_layout
, 1,
814 /* Choose the newest best drive which is
815 * not up-to-date, update the superblock
819 struct supertype
*tst
;
820 unsigned long long current_events
;
821 int chosen_drive
= -1;
825 i
< content
->array
.raid_disks
* 2 && i
< bestcnt
;
829 !devices
[j
].uptodate
&&
830 devices
[j
].i
.recovery_start
== MaxSector
&&
833 > devices
[chosen_drive
].i
.events
))
836 if (chosen_drive
< 0)
838 current_events
= devices
[chosen_drive
].i
.events
;
841 pr_err("forcing event count in %s(%d) from %d upto %d\n",
842 devices
[chosen_drive
].devname
,
843 devices
[chosen_drive
].i
.disk
.raid_disk
,
844 (int)(devices
[chosen_drive
].i
.events
),
845 (int)(devices
[most_recent
].i
.events
));
846 fd
= dev_open(devices
[chosen_drive
].devname
,
847 devices
[chosen_drive
].included
? O_RDWR
850 pr_err("Couldn't open %s for write - not updating\n",
851 devices
[chosen_drive
].devname
);
852 devices
[chosen_drive
].i
.events
= 0;
856 if (tst
->ss
->load_super(tst
,fd
, NULL
)) {
858 pr_err("RAID superblock disappeared from %s - not updating.\n",
859 devices
[chosen_drive
].devname
);
860 devices
[chosen_drive
].i
.events
= 0;
863 content
->events
= devices
[most_recent
].i
.events
;
864 tst
->ss
->update_super(tst
, content
, "force-one",
865 devices
[chosen_drive
].devname
, c
->verbose
,
868 if (tst
->ss
->store_super(tst
, fd
)) {
870 pr_err("Could not re-write superblock on %s\n",
871 devices
[chosen_drive
].devname
);
872 devices
[chosen_drive
].i
.events
= 0;
873 tst
->ss
->free_super(tst
);
877 devices
[chosen_drive
].i
.events
= devices
[most_recent
].i
.events
;
878 devices
[chosen_drive
].uptodate
= 1;
879 avail
[chosen_drive
] = 1;
881 tst
->ss
->free_super(tst
);
883 /* If there are any other drives of the same vintage,
884 * add them in as well. We can't lose and we might gain
887 i
< content
->array
.raid_disks
* 2 && i
< bestcnt
;
891 !devices
[j
].uptodate
&&
892 devices
[j
].i
.recovery_start
== MaxSector
&&
893 devices
[j
].i
.events
== current_events
) {
902 static int start_array(int mdfd
,
904 struct mdinfo
*content
,
905 struct supertype
*st
,
906 struct mddev_ident
*ident
,
907 int *best
, int bestcnt
,
909 struct devs
*devices
,
911 unsigned int sparecnt
,
912 unsigned int rebuilding_cnt
,
914 int clean
, char *avail
,
915 int start_partial_ok
,
922 unsigned int req_cnt
;
924 rv
= set_array_info(mdfd
, st
, content
);
926 pr_err("failed to set array info for %s: %s\n",
927 mddev
, strerror(errno
));
930 if (ident
->bitmap_fd
>= 0) {
931 if (ioctl(mdfd
, SET_BITMAP_FILE
, ident
->bitmap_fd
) != 0) {
932 pr_err("SET_BITMAP_FILE failed.\n");
935 } else if (ident
->bitmap_file
) {
936 /* From config file */
937 int bmfd
= open(ident
->bitmap_file
, O_RDWR
);
939 pr_err("Could not open bitmap file %s\n",
943 if (ioctl(mdfd
, SET_BITMAP_FILE
, bmfd
) != 0) {
944 pr_err("Failed to set bitmapfile for %s\n", mddev
);
951 /* First, add the raid disks, but add the chosen one last */
952 for (i
=0; i
<= bestcnt
; i
++) {
956 if (j
== chosen_drive
)
961 if (j
>= 0 && !devices
[j
].included
) {
962 int dfd
= dev_open(devices
[j
].devname
,
965 remove_partitions(dfd
);
968 rv
= add_disk(mdfd
, st
, content
, &devices
[j
].i
);
971 pr_err("failed to add "
976 if (i
< content
->array
.raid_disks
* 2
981 } else if (c
->verbose
> 0)
982 pr_err("added %s to %s as %d%s%s\n",
983 devices
[j
].devname
, mddev
,
984 devices
[j
].i
.disk
.raid_disk
,
985 devices
[j
].uptodate
?"":
986 " (possibly out of date)",
987 (devices
[j
].i
.disk
.state
& (1<<MD_DISK_REPLACEMENT
))?" replacement":"");
990 pr_err("%s is already in %s as %d\n",
991 devices
[j
].devname
, mddev
,
992 devices
[j
].i
.disk
.raid_disk
);
993 } else if (c
->verbose
> 0 && i
< content
->array
.raid_disks
*2
995 pr_err("no uptodate device for slot %d of %s\n",
999 if (content
->array
.level
== LEVEL_CONTAINER
) {
1000 if (c
->verbose
>= 0) {
1001 pr_err("Container %s has been "
1002 "assembled with %d drive%s",
1003 mddev
, okcnt
+sparecnt
, okcnt
+sparecnt
==1?"":"s");
1004 if (okcnt
< (unsigned)content
->array
.raid_disks
)
1005 fprintf(stderr
, " (out of %d)",
1006 content
->array
.raid_disks
);
1007 fprintf(stderr
, "\n");
1010 if (st
->ss
->validate_container
) {
1011 struct mdinfo
*devices_list
;
1012 struct mdinfo
*info_devices
= xmalloc(sizeof(struct mdinfo
)*(okcnt
+sparecnt
));
1014 devices_list
= NULL
;
1015 for (count
= 0; count
< okcnt
+sparecnt
; count
++) {
1016 info_devices
[count
] = devices
[count
].i
;
1017 info_devices
[count
].next
= devices_list
;
1018 devices_list
= &info_devices
[count
];
1020 if (st
->ss
->validate_container(devices_list
))
1021 pr_err("Mismatch detected!\n");
1025 st
->ss
->free_super(st
);
1026 sysfs_uevent(content
, "change");
1027 if (err_ok
&& okcnt
< (unsigned)content
->array
.raid_disks
)
1028 /* Was partial, is still partial, so signal an error
1029 * to ensure we don't retry */
1034 /* Get number of in-sync devices according to the superblock.
1035 * We must have this number to start the array without -s or -R
1037 req_cnt
= content
->array
.working_disks
;
1039 if (c
->runstop
== 1 ||
1041 ( enough(content
->array
.level
, content
->array
.raid_disks
,
1042 content
->array
.layout
, clean
, avail
) &&
1043 (okcnt
+ rebuilding_cnt
>= req_cnt
|| start_partial_ok
)
1045 /* This array is good-to-go.
1046 * If a reshape is in progress then we might need to
1047 * continue monitoring it. In that case we start
1048 * it read-only and let the grow code make it writable.
1052 if (content
->reshape_active
&&
1053 !(content
->reshape_active
& RESHAPE_NO_BACKUP
) &&
1054 content
->delta_disks
<= 0) {
1055 if (!c
->backup_file
) {
1056 pr_err("%s: Need a backup file to complete reshape of this array.\n",
1058 pr_err("Please provided one with \"--backup-file=...\"\n");
1060 strcmp(c
->update
, "revert-reshape") == 0)
1061 pr_err("(Don't specify --update=revert-reshape again, that part succeeded.)\n");
1064 rv
= sysfs_set_str(content
, NULL
,
1065 "array_state", "readonly");
1067 rv
= Grow_continue(mdfd
, st
, content
,
1070 } else if (c
->readonly
&&
1071 sysfs_attribute_available(
1072 content
, NULL
, "array_state")) {
1073 rv
= sysfs_set_str(content
, NULL
,
1074 "array_state", "readonly");
1077 rv
= ioctl(mdfd
, RUN_ARRAY
, NULL
);
1078 reopen_mddev(mdfd
); /* drop O_EXCL */
1080 if (c
->verbose
>= 0) {
1081 pr_err("%s has been started with %d drive%s",
1082 mddev
, okcnt
, okcnt
==1?"":"s");
1083 if (okcnt
< (unsigned)content
->array
.raid_disks
)
1084 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
1086 fprintf(stderr
, "%s %d rebuilding", sparecnt
?",":" and", rebuilding_cnt
);
1088 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1089 fprintf(stderr
, ".\n");
1091 if (content
->reshape_active
&&
1092 content
->array
.level
>= 4 &&
1093 content
->array
.level
<= 6) {
1094 /* might need to increase the size
1095 * of the stripe cache - default is 256
1097 if (256 < 4 * (content
->array
.chunk_size
/4096)) {
1098 struct mdinfo
*sra
= sysfs_read(mdfd
, NULL
, 0);
1100 sysfs_set_num(sra
, NULL
,
1101 "stripe_cache_size",
1102 (4 * content
->array
.chunk_size
/ 4096) + 1);
1106 if (okcnt
< (unsigned)content
->array
.raid_disks
) {
1107 /* If any devices did not get added
1108 * because the kernel rejected them based
1109 * on event count, try adding them
1110 * again providing the action policy is
1111 * 're-add' or greater. The bitmap
1112 * might allow them to be included, or
1113 * they will become spares.
1115 for (i
= 0; i
< bestcnt
; i
++) {
1117 if (j
>= 0 && !devices
[j
].uptodate
) {
1118 if (!disk_action_allows(&devices
[j
].i
, st
->ss
->name
, act_re_add
))
1120 rv
= add_disk(mdfd
, st
, content
,
1122 if (rv
== 0 && c
->verbose
>= 0)
1123 pr_err("%s has been re-added.\n",
1124 devices
[j
].devname
);
1128 if (content
->array
.level
== 6 &&
1129 okcnt
+ 1 == (unsigned)content
->array
.raid_disks
&&
1131 struct mdinfo
*sra
= sysfs_read(mdfd
, NULL
, 0);
1133 sysfs_set_str(sra
, NULL
,
1134 "sync_action", "repair");
1139 pr_err("failed to RUN_ARRAY %s: %s\n",
1140 mddev
, strerror(errno
));
1142 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1143 content
->array
.layout
, 1, avail
))
1144 pr_err("Not enough devices to "
1145 "start the array.\n");
1146 else if (!enough(content
->array
.level
,
1147 content
->array
.raid_disks
,
1148 content
->array
.layout
, clean
,
1150 pr_err("Not enough devices to "
1151 "start the array while not clean "
1152 "- consider --force.\n");
1156 if (c
->runstop
== -1) {
1157 pr_err("%s assembled from %d drive%s",
1158 mddev
, okcnt
, okcnt
==1?"":"s");
1159 if (okcnt
!= (unsigned)content
->array
.raid_disks
)
1160 fprintf(stderr
, " (out of %d)", content
->array
.raid_disks
);
1161 fprintf(stderr
, ", but not started.\n");
1164 if (c
->verbose
>= -1) {
1165 pr_err("%s assembled from %d drive%s", mddev
, okcnt
, okcnt
==1?"":"s");
1167 fprintf(stderr
, "%s %d rebuilding", sparecnt
?",":" and", rebuilding_cnt
);
1169 fprintf(stderr
, " and %d spare%s", sparecnt
, sparecnt
==1?"":"s");
1170 if (!enough(content
->array
.level
, content
->array
.raid_disks
,
1171 content
->array
.layout
, 1, avail
))
1172 fprintf(stderr
, " - not enough to start the array.\n");
1173 else if (!enough(content
->array
.level
,
1174 content
->array
.raid_disks
,
1175 content
->array
.layout
, clean
,
1177 fprintf(stderr
, " - not enough to start the "
1178 "array while not clean - consider "
1181 if (req_cnt
== (unsigned)content
->array
.raid_disks
)
1182 fprintf(stderr
, " - need all %d to start it", req_cnt
);
1184 fprintf(stderr
, " - need %d to start", req_cnt
);
1185 fprintf(stderr
, " (use --run to insist).\n");
1191 int Assemble(struct supertype
*st
, char *mddev
,
1192 struct mddev_ident
*ident
,
1193 struct mddev_dev
*devlist
,
1197 * The task of Assemble is to find a collection of
1198 * devices that should (according to their superblocks)
1199 * form an array, and to give this collection to the MD driver.
1200 * In Linux-2.4 and later, this involves submitting a
1201 * SET_ARRAY_INFO ioctl with no arg - to prepare
1202 * the array - and then submit a number of
1203 * ADD_NEW_DISK ioctls to add disks into
1204 * the array. Finally RUN_ARRAY might
1205 * be submitted to start the array.
1207 * Much of the work of Assemble is in finding and/or
1208 * checking the disks to make sure they look right.
1210 * If mddev is not set, then scan must be set and we
1211 * read through the config file for dev+uuid mapping
1212 * We recurse, setting mddev, for each device that
1214 * - has a valid uuid (or any uuid if !uuidset)
1216 * If mddev is set, we try to determine state of md.
1217 * check version - must be at least 0.90.0
1218 * check kernel version. must be at least 2.4.
1219 * If not, we can possibly fall back on START_ARRAY
1220 * Try to GET_ARRAY_INFO.
1221 * If possible, give up
1222 * If not, try to STOP_ARRAY just to make sure
1224 * If !uuidset and scan, look in conf-file for uuid
1225 * If not found, give up
1226 * If !devlist and scan and uuidset, get list of devs from conf-file
1229 * Check superblock - discard if bad
1230 * Check uuid (set if we don't have one) - discard if no match
1231 * Check superblock similarity if we have a superblock - discard if different
1232 * Record events, devicenum
1233 * This should give us a list of devices for the array
1234 * We should collect the most recent event number
1236 * Count disks with recent enough event count
1237 * While force && !enough disks
1238 * Choose newest rejected disks, update event count
1239 * mark clean and rewrite superblock
1242 * foreach device with recent events : ADD_NEW_DISK
1243 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
1245 * Check the device numbers in superblock are right
1246 * update superblock if any changes
1253 int auto_assem
= (mddev
== NULL
&& !ident
->uuid_set
&&
1254 ident
->super_minor
== UnSet
&& ident
->name
[0] == 0
1255 && (ident
->container
== NULL
|| ident
->member
== NULL
));
1256 struct devs
*devices
;
1258 int *best
= NULL
; /* indexed by raid_disk */
1261 unsigned int okcnt
, sparecnt
, rebuilding_cnt
, replcnt
;
1264 int most_recent
= 0;
1268 int start_partial_ok
= (c
->runstop
>= 0) &&
1269 (c
->force
|| devlist
==NULL
|| auto_assem
);
1271 struct mddev_dev
*tmpdev
;
1273 struct mdinfo
*content
= NULL
;
1274 struct mdinfo
*pre_exist
= NULL
;
1277 char chosen_name
[1024];
1278 struct map_ent
*map
= NULL
;
1282 * If any subdevs are listed, then any that don't
1283 * match ident are discarded. Remainder must all match and
1285 * If no subdevs, then we scan all devices in the config file, but
1286 * there must be something in the identity
1290 ident
->uuid_set
== 0 &&
1291 (ident
->super_minor
< 0 || ident
->super_minor
== UnSet
) &&
1292 ident
->name
[0] == 0 &&
1293 (ident
->container
== NULL
|| ident
->member
== NULL
) &&
1294 ident
->devices
== NULL
) {
1295 pr_err("No identity information available for %s - cannot assemble.\n",
1296 mddev
? mddev
: "further assembly");
1300 if (devlist
== NULL
)
1301 devlist
= conf_get_devs();
1306 /* We come back here when doing auto-assembly and attempting some
1307 * set of devices failed. Those are now marked as ->used==2 and
1308 * we ignore them and try again
1310 if (!st
&& ident
->st
)
1313 pr_err("looking for devices for %s\n",
1314 mddev
? mddev
: "further assembly");
1318 st
->ignore_hw_compat
= 1;
1319 num_devs
= select_devices(devlist
, ident
, &st
, &content
, c
,
1320 inargv
, auto_assem
);
1324 if (!st
|| !st
->sb
|| !content
)
1327 /* We have a full set of devices - we now need to find the
1329 * However there is a risk that we are racing with "mdadm -I"
1330 * and the array is already partially assembled - we will have
1331 * rejected any devices already in this address.
1332 * So we take a lock on the map file - to prevent further races -
1333 * and look for the uuid in there. If found and the array is
1334 * active, we abort. If found and the array is not active
1335 * we commit to that md device and add all the contained devices
1336 * to our list. We flag them so that we don't try to re-add,
1337 * but can remove if they turn out to not be wanted.
1340 pr_err("failed to get exclusive lock on mapfile - continue anyway...\n");
1341 mp
= map_by_uuid(&map
, content
->uuid
);
1344 /* array already exists. */
1345 pre_exist
= sysfs_read(-1, mp
->devnm
, GET_LEVEL
|GET_DEVS
);
1346 if (pre_exist
->array
.level
!= UnSet
) {
1347 pr_err("Found some drive for an array that is already active: %s\n",
1349 pr_err("giving up.\n");
1352 for (dv
= pre_exist
->devs
; dv
; dv
= dv
->next
) {
1353 /* We want to add this device to our list,
1354 * but it could already be there if "mdadm -I"
1355 * started *after* we checked for O_EXCL.
1356 * If we add it to the top of the list
1357 * it will be preferred over later copies.
1359 struct mddev_dev
*newdev
;
1360 char *devname
= map_dev(dv
->disk
.major
,
1365 newdev
= xmalloc(sizeof(*newdev
));
1366 newdev
->devname
= devname
;
1367 newdev
->disposition
= 'I';
1369 newdev
->next
= devlist
;
1373 strcpy(chosen_name
, mp
->path
);
1374 if (c
->verbose
> 0 || mddev
== NULL
||
1375 strcmp(mddev
, chosen_name
) != 0)
1376 pr_err("Merging with already-assembled %s\n",
1378 mdfd
= open_dev_excl(mp
->devnm
);
1380 int trustworthy
= FOREIGN
;
1381 name
= content
->name
;
1382 switch (st
->ss
->match_home(st
, c
->homehost
)
1383 ?: st
->ss
->match_home(st
, "any")) {
1385 trustworthy
= LOCAL
;
1386 name
= strchr(content
->name
, ':');
1390 name
= content
->name
;
1394 /* If the array is listed in mdadm.conf or on
1395 * command line, then we trust the name
1396 * even if the array doesn't look local
1398 trustworthy
= LOCAL
;
1401 content
->array
.level
== LEVEL_CONTAINER
) {
1402 name
= content
->text_version
;
1403 trustworthy
= METADATA
;
1406 if (name
[0] && trustworthy
!= LOCAL
&&
1407 ! c
->require_homehost
&&
1408 conf_name_is_free(name
))
1409 trustworthy
= LOCAL
;
1411 if (trustworthy
== LOCAL
&&
1413 /* Ignore 'host:' prefix of name */
1414 name
= strchr(name
, ':')+1;
1416 mdfd
= create_mddev(mddev
, name
, ident
->autof
, trustworthy
,
1420 st
->ss
->free_super(st
);
1425 mddev
= chosen_name
;
1426 if (get_linux_version() < 2004000 ||
1427 md_get_version(mdfd
) < 9000) {
1428 pr_err("Assemble requires Linux 2.4 or later, and\n"
1429 " md driver version 0.90.0 or later.\n"
1430 " Upgrade your kernel or try --build\n");
1434 if (pre_exist
== NULL
) {
1435 if (mddev_busy(fd2devnm(mdfd
))) {
1436 pr_err("%s already active, cannot restart it!\n",
1438 for (tmpdev
= devlist
;
1439 tmpdev
&& tmpdev
->used
!= 1;
1440 tmpdev
= tmpdev
->next
)
1442 if (tmpdev
&& auto_assem
)
1443 pr_err("%s needed for %s...\n",
1444 mddev
, tmpdev
->devname
);
1447 st
->ss
->free_super(st
);
1452 /* just incase it was started but has no content */
1453 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1457 if (content
!= &info
) {
1458 /* This is a member of a container. Try starting the array. */
1460 err
= assemble_container_content(st
, mdfd
, content
, c
,
1466 /* Ok, no bad inconsistancy, we can try updating etc */
1467 devices
= xcalloc(num_devs
, sizeof(*devices
));
1468 devmap
= xcalloc(num_devs
, content
->array
.raid_disks
);
1469 devcnt
= load_devices(devices
, devmap
, ident
, &st
, devlist
,
1470 c
, content
, mdfd
, mddev
,
1471 &most_recent
, &bestcnt
, &best
, inargv
);
1476 pr_err("no devices found for %s\n",
1479 st
->ss
->free_super(st
);
1486 if (c
->update
&& strcmp(c
->update
, "byteorder")==0)
1487 st
->minor_version
= 90;
1489 st
->ss
->getinfo_super(st
, content
, NULL
);
1490 clean
= content
->array
.state
& 1;
1492 /* now we have some devices that might be suitable.
1495 avail
= xcalloc(content
->array
.raid_disks
, 1);
1500 for (i
=0; i
< bestcnt
; i
++) {
1502 int event_margin
= 1; /* always allow a difference of '1'
1503 * like the kernel does
1505 if (j
< 0) continue;
1506 /* note: we ignore error flags in multipath arrays
1507 * as they don't make sense
1509 if (content
->array
.level
!= LEVEL_MULTIPATH
)
1510 if (!(devices
[j
].i
.disk
.state
& (1<<MD_DISK_ACTIVE
))) {
1511 if (!(devices
[j
].i
.disk
.state
1512 & (1<<MD_DISK_FAULTY
))) {
1513 devices
[j
].uptodate
= 1;
1518 /* If this device thinks that 'most_recent' has failed, then
1519 * we must reject this device.
1521 if (j
!= most_recent
&& !c
->force
&&
1522 content
->array
.raid_disks
> 0 &&
1523 devices
[most_recent
].i
.disk
.raid_disk
>= 0 &&
1524 devmap
[j
* content
->array
.raid_disks
+ devices
[most_recent
].i
.disk
.raid_disk
] == 0) {
1525 if (c
->verbose
> -1)
1526 pr_err("ignoring %s as it reports %s as failed\n",
1527 devices
[j
].devname
, devices
[most_recent
].devname
);
1531 /* Require event counter to be same as, or just less than,
1532 * most recent. If it is bigger, it must be a stray spare and
1533 * should be ignored.
1535 if (devices
[j
].i
.events
+event_margin
>=
1536 devices
[most_recent
].i
.events
&&
1537 devices
[j
].i
.events
<=
1538 devices
[most_recent
].i
.events
1540 devices
[j
].uptodate
= 1;
1541 if (i
< content
->array
.raid_disks
* 2) {
1542 if (devices
[j
].i
.recovery_start
== MaxSector
||
1543 (content
->reshape_active
&&
1544 ((i
>= content
->array
.raid_disks
- content
->delta_disks
) ||
1545 (i
>= content
->array
.raid_disks
- content
->delta_disks
- 1
1546 && content
->array
.level
== 4)))) {
1560 int force_ok
= force_array(content
, devices
, best
, bestcnt
,
1561 avail
, most_recent
, st
, c
);
1566 /* Now we want to look at the superblock which the kernel will base things on
1567 * and compare the devices that we think are working with the devices that the
1568 * superblock thinks are working.
1569 * If there are differences and --force is given, then update this chosen
1573 st
->ss
->free_super(st
);
1574 for (i
=0; chosen_drive
< 0 && i
<bestcnt
; i
+=2) {
1580 if (!devices
[j
].uptodate
)
1582 if (devices
[j
].i
.events
< devices
[most_recent
].i
.events
)
1585 if ((fd
=dev_open(devices
[j
].devname
,
1586 devices
[j
].included
? O_RDONLY
1587 : (O_RDONLY
|O_EXCL
)))< 0) {
1588 pr_err("Cannot open %s: %s\n",
1589 devices
[j
].devname
, strerror(errno
));
1594 if (st
->ss
->load_super(st
,fd
, NULL
)) {
1596 pr_err("RAID superblock has disappeared from %s\n",
1597 devices
[j
].devname
);
1604 if (st
->sb
== NULL
) {
1605 pr_err("No suitable drives found for %s\n", mddev
);
1610 st
->ss
->getinfo_super(st
, content
, NULL
);
1612 sysfs_init(content
, mdfd
, NULL
);
1614 for (i
=0; i
<bestcnt
; i
++) {
1616 unsigned int desired_state
;
1618 if (i
>= content
->array
.raid_disks
* 2)
1621 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_REPLACEMENT
);
1623 desired_state
= (1<<MD_DISK_ACTIVE
) | (1<<MD_DISK_SYNC
);
1627 if (!devices
[j
].uptodate
)
1630 devices
[j
].i
.disk
.state
= desired_state
;
1631 if (!(devices
[j
].i
.array
.state
& 1))
1634 if (st
->ss
->update_super(st
, &devices
[j
].i
, "assemble", NULL
,
1635 c
->verbose
, 0, NULL
)) {
1637 if (c
->verbose
>= 0)
1638 pr_err("clearing FAULTY flag for device %d in %s for %s\n",
1639 j
, mddev
, devices
[j
].devname
);
1642 if (c
->verbose
>= -1)
1643 pr_err("device %d in %s has wrong state in superblock, but %s seems ok\n",
1644 i
, mddev
, devices
[j
].devname
);
1648 if (!(super
.disks
[i
].i
.disk
.state
& (1 << MD_DISK_FAULTY
))) {
1649 pr_err("devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
1654 if (c
->force
&& !clean
&&
1655 !enough(content
->array
.level
, content
->array
.raid_disks
,
1656 content
->array
.layout
, clean
,
1658 change
+= st
->ss
->update_super(st
, content
, "force-array",
1659 devices
[chosen_drive
].devname
, c
->verbose
,
1667 fd
= dev_open(devices
[chosen_drive
].devname
,
1668 devices
[chosen_drive
].included
?
1669 O_RDWR
: (O_RDWR
|O_EXCL
));
1671 pr_err("Could not open %s for write - cannot Assemble array.\n",
1672 devices
[chosen_drive
].devname
);
1677 if (st
->ss
->store_super(st
, fd
)) {
1679 pr_err("Could not re-write superblock on %s\n",
1680 devices
[chosen_drive
].devname
);
1685 if (c
->verbose
>= 0)
1686 pr_err("Marking array %s as 'clean'\n",
1691 /* If we are in the middle of a reshape we may need to restore saved data
1692 * that was moved aside due to the reshape overwriting live data
1693 * The code of doing this lives in Grow.c
1696 if (content
->reshape_active
&&
1697 !(content
->reshape_active
& RESHAPE_NO_BACKUP
)) {
1699 int *fdlist
= xmalloc(sizeof(int)* bestcnt
);
1701 pr_err(":%s has an active reshape - checking "
1702 "if critical section needs to be restored\n",
1704 if (!c
->backup_file
)
1705 c
->backup_file
= locate_backup(content
->sys_name
);
1706 enable_fds(bestcnt
/2);
1707 for (i
= 0; i
< bestcnt
/2; i
++) {
1710 fdlist
[i
] = dev_open(devices
[j
].devname
,
1712 ? O_RDWR
: (O_RDWR
|O_EXCL
));
1713 if (fdlist
[i
] < 0) {
1714 pr_err("Could not open %s for write - cannot Assemble array.\n",
1715 devices
[j
].devname
);
1723 if (st
->ss
->external
&& st
->ss
->recover_backup
)
1724 err
= st
->ss
->recover_backup(st
, content
);
1726 err
= Grow_restart(st
, content
, fdlist
, bestcnt
/2,
1727 c
->backup_file
, c
->verbose
> 0);
1728 if (err
&& c
->invalid_backup
) {
1731 " without restoring backup\n");
1737 if (fdlist
[i
]>=0) close(fdlist
[i
]);
1741 pr_err("Failed to restore critical section for reshape, sorry.\n");
1742 if (c
->backup_file
== NULL
)
1743 cont_err("Possibly you needed to specify the --backup-file\n");
1751 /* Almost ready to actually *do* something */
1752 /* First, fill in the map, so that udev can find our name
1753 * as soon as we become active.
1755 if (c
->update
&& strcmp(c
->update
, "metadata")==0) {
1756 content
->array
.major_version
= 1;
1757 content
->array
.minor_version
= 0;
1758 strcpy(content
->text_version
, "1.0");
1761 map_update(&map
, fd2devnm(mdfd
), content
->text_version
,
1762 content
->uuid
, chosen_name
);
1764 rv
= start_array(mdfd
, mddev
, content
,
1765 st
, ident
, best
, bestcnt
,
1766 chosen_drive
, devices
, okcnt
, sparecnt
,
1769 clean
, avail
, start_partial_ok
,
1772 if (rv
== 1 && !pre_exist
)
1773 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1777 wait_for(chosen_name
, mdfd
);
1781 /* There is a nasty race with 'mdadm --monitor'.
1782 * If it opens this device before we close it,
1783 * it gets an incomplete open on which IO
1784 * doesn't work and the capacity is
1786 * If we reopen (to check for layered devices)
1787 * before --monitor closes, we loose.
1789 * So: wait upto 1 second for there to be
1790 * a non-zero capacity.
1792 while (usecs
< 1000) {
1793 mdfd
= open(mddev
, O_RDONLY
);
1795 unsigned long long size
;
1796 if (get_dev_size(mdfd
, NULL
, &size
) &&
1808 /* '2' means 'OK, but not started yet' */
1809 return rv
== 2 ? 0 : rv
;
1813 int assemble_container_content(struct supertype
*st
, int mdfd
,
1814 struct mdinfo
*content
, struct context
*c
,
1815 char *chosen_name
, int *result
)
1817 struct mdinfo
*dev
, *sra
, *dev2
;
1818 int working
= 0, preexist
= 0;
1820 struct map_ent
*map
= NULL
;
1826 sysfs_init(content
, mdfd
, NULL
);
1828 sra
= sysfs_read(mdfd
, NULL
, GET_VERSION
|GET_DEVS
);
1829 if (sra
== NULL
|| strcmp(sra
->text_version
, content
->text_version
) != 0) {
1830 if (content
->array
.major_version
== -1 &&
1831 content
->array
.minor_version
== -2 &&
1833 content
->text_version
[0] == '/')
1834 content
->text_version
[0] = '-';
1835 if (sysfs_set_array(content
, md_get_version(mdfd
)) != 0) {
1842 /* There are two types of reshape: container wide or sub-array specific
1843 * Check if metadata requests blocking container wide reshapes
1845 start_reshape
= (content
->reshape_active
&&
1846 !((content
->reshape_active
== CONTAINER_RESHAPE
) &&
1847 (content
->array
.state
& (1<<MD_SB_BLOCK_CONTAINER_RESHAPE
))));
1849 /* Block subarray here if it is under reshape now
1850 * Do not allow for any changes in this array
1852 if (st
->ss
->external
&& content
->recovery_blocked
&& start_reshape
)
1853 block_subarray(content
);
1855 for (dev2
= sra
->devs
; dev2
; dev2
= dev2
->next
) {
1856 for (dev
= content
->devs
; dev
; dev
= dev
->next
)
1857 if (dev2
->disk
.major
== dev
->disk
.major
&&
1858 dev2
->disk
.minor
== dev
->disk
.minor
)
1862 /* Don't want this one any more */
1863 if (sysfs_set_str(sra
, dev2
, "slot", "none") < 0 &&
1865 pr_err("Cannot remove old device %s: not updating %s\n", dev2
->sys_name
, sra
->sys_name
);
1869 sysfs_set_str(sra
, dev2
, "state", "remove");
1871 old_raid_disks
= content
->array
.raid_disks
- content
->delta_disks
;
1872 avail
= xcalloc(content
->array
.raid_disks
, 1);
1873 for (dev
= content
->devs
; dev
; dev
= dev
->next
) {
1874 if (dev
->disk
.raid_disk
>= 0)
1875 avail
[dev
->disk
.raid_disk
] = 1;
1876 if (sysfs_add_disk(content
, dev
, 1) == 0) {
1877 if (dev
->disk
.raid_disk
>= old_raid_disks
&&
1878 content
->reshape_active
)
1882 } else if (errno
== EEXIST
)
1886 if (working
+ expansion
== 0 && c
->runstop
<= 0) {
1888 return 1;/* Nothing new, don't try to start */
1890 map_update(&map
, fd2devnm(mdfd
),
1891 content
->text_version
,
1892 content
->uuid
, chosen_name
);
1895 if (enough(content
->array
.level
, content
->array
.raid_disks
,
1896 content
->array
.layout
, content
->array
.state
& 1, avail
) == 0) {
1897 if (c
->export
&& result
)
1899 else if (c
->verbose
>= 0) {
1900 pr_err("%s assembled with %d device%s",
1901 chosen_name
, preexist
+ working
,
1902 preexist
+ working
== 1 ? "":"s");
1904 fprintf(stderr
, " (%d new)", working
);
1905 fprintf(stderr
, " but not started\n");
1912 if (c
->runstop
<= 0 &&
1913 (working
+ preexist
+ expansion
) <
1914 content
->array
.working_disks
) {
1915 if (c
->export
&& result
)
1916 *result
|= INCR_UNSAFE
;
1917 else if (c
->verbose
>= 0) {
1918 pr_err("%s assembled with %d device%s",
1919 chosen_name
, preexist
+ working
,
1920 preexist
+ working
== 1 ? "":"s");
1922 fprintf(stderr
, " (%d new)", working
);
1923 fprintf(stderr
, " but not safe to start\n");
1929 if (start_reshape
) {
1930 int spare
= content
->array
.raid_disks
+ expansion
;
1931 if (restore_backup(st
, content
,
1933 spare
, &c
->backup_file
, c
->verbose
) == 1)
1936 err
= sysfs_set_str(content
, NULL
,
1937 "array_state", "readonly");
1941 if (st
->ss
->external
) {
1942 if (!mdmon_running(st
->container_devnm
))
1943 start_mdmon(st
->container_devnm
);
1944 ping_monitor(st
->container_devnm
);
1945 if (mdmon_running(st
->container_devnm
) &&
1946 st
->update_tail
== NULL
)
1947 st
->update_tail
= &st
->updates
;
1950 err
= Grow_continue(mdfd
, st
, content
, c
->backup_file
,
1951 0, c
->freeze_reshape
);
1952 } else switch(content
->array
.level
) {
1954 case LEVEL_MULTIPATH
:
1956 err
= sysfs_set_str(content
, NULL
, "array_state",
1957 c
->readonly
? "readonly" : "active");
1960 err
= sysfs_set_str(content
, NULL
, "array_state",
1962 /* start mdmon if needed. */
1964 if (!mdmon_running(st
->container_devnm
))
1965 start_mdmon(st
->container_devnm
);
1966 ping_monitor(st
->container_devnm
);
1971 sysfs_set_safemode(content
, content
->safe_mode_delay
);
1973 /* Block subarray here if it is not reshaped now
1974 * It has be blocked a little later to allow mdmon to switch in
1977 if (st
->ss
->external
&& content
->recovery_blocked
&&
1979 block_subarray(content
);
1981 if (c
->export
&& result
) {
1985 *result
|= INCR_YES
;
1986 } else if (c
->verbose
>= 0) {
1988 pr_err("array %s now has %d device%s",
1989 chosen_name
, working
+ preexist
,
1990 working
+ preexist
== 1 ? "":"s");
1992 pr_err("Started %s with %d device%s",
1993 chosen_name
, working
+ preexist
,
1994 working
+ preexist
== 1 ? "":"s");
1996 fprintf(stderr
, " (%d new)", working
);
1998 fprintf(stderr
, " ( + %d for expansion)",
2000 fprintf(stderr
, "\n");
2003 wait_for(chosen_name
, mdfd
);
2005 /* FIXME should have an O_EXCL and wait for read-auto */