wait_for improvement.
[thirdparty/mdadm.git] / Assemble.c
CommitLineData
64c4757e 1/*
9a9dab36 2 * mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e 3 *
4f589ad0 4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
64c4757e
NB
5 *
6 *
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.
11 *
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.
16 *
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
20 *
21 * Author: Neil Brown
22 * Email: <neilb@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 */
29
9a9dab36 30#include "mdadm.h"
41a3b72a 31#include <ctype.h>
64c4757e 32
624920bb
NB
33static int name_matches(char *found, char *required, char *homehost)
34{
35 /* See if the name found matches the required name, possibly
36 * prefixed with 'homehost'
37 */
38 char fnd[33];
39
40 strncpy(fnd, found, 32);
41 fnd[32] = 0;
42 if (strcmp(found, required)==0)
43 return 1;
44 if (homehost) {
45 int l = strlen(homehost);
46 if (l < 32 && fnd[l] == ':' &&
47 strcmp(fnd+l+1, required)==0)
48 return 1;
49 }
50 return 0;
51}
52
9008ed1c 53static int is_member_busy(char *metadata_version)
2de8884f
DW
54{
55 /* check if the given member array is active */
56 struct mdstat_ent *mdstat = mdstat_read(1, 0);
57 struct mdstat_ent *ent;
58 int busy = 0;
59
60 for (ent = mdstat; ent; ent = ent->next) {
61 if (ent->metadata_version == NULL)
62 continue;
63 if (strncmp(ent->metadata_version, "external:", 9) != 0)
64 continue;
65 if (!is_subarray(&ent->metadata_version[9]))
66 continue;
67 /* Skip first char - it can be '/' or '-' */
68 if (strcmp(&ent->metadata_version[10], metadata_version+1) == 0) {
69 busy = 1;
70 break;
71 }
72 }
73 free_mdstat(mdstat);
74
75 return busy;
76}
77
7f91af49 78int Assemble(struct supertype *st, char *mddev,
8aec876d 79 mddev_ident_t ident,
06b0d786 80 mddev_dev_t devlist, char *backup_file,
64c4757e 81 int readonly, int runstop,
e5eac01f 82 char *update, char *homehost,
64c4757e
NB
83 int verbose, int force)
84{
85 /*
52826846
NB
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
64c4757e
NB
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.
95 *
96 * Much of the work of Assemble is in finding and/or
97 * checking the disks to make sure they look right.
98 *
4b1ac34b 99 * If mddev is not set, then scan must be set and we
64c4757e
NB
100 * read through the config file for dev+uuid mapping
101 * We recurse, setting mddev, for each device that
102 * - isn't running
4b1ac34b 103 * - has a valid uuid (or any uuid if !uuidset)
64c4757e
NB
104 *
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
112 *
113 * If !uuidset and scan, look in conf-file for uuid
114 * If not found, give up
b8a8ccf9 115 * If !devlist and scan and uuidset, get list of devs from conf-file
64c4757e
NB
116 *
117 * For each device:
118 * Check superblock - discard if bad
119 * Check uuid (set if we don't have one) - discard if no match
5787fa49 120 * Check superblock similarity if we have a superblock - discard if different
4b1ac34b 121 * Record events, devicenum
64c4757e 122 * This should give us a list of devices for the array
4b1ac34b 123 * We should collect the most recent event number
64c4757e
NB
124 *
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
129 * If recent kernel:
130 * SET_ARRAY_INFO
131 * foreach device with recent events : ADD_NEW_DISK
132 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
133 * If old kernel:
134 * Check the device numbers in superblock are right
135 * update superblock if any changes
136 * START_ARRAY
137 *
138 */
c30e5369
N
139 int mdfd;
140 int clean;
f05641cf
N
141 int auto_assem = (mddev == NULL && !ident->uuid_set &&
142 ident->super_minor == UnSet && ident->name[0] == 0
143 && ident->container == NULL && ident->member == NULL);
64c4757e 144 int old_linux = 0;
c30e5369 145 int vers = vers; /* Keep gcc quite - it really is initialised */
64c4757e
NB
146 struct {
147 char *devname;
213ee40b
NB
148 int uptodate; /* set once we decide that this device is as
149 * recent as everything else in the array.
150 */
151 struct mdinfo i;
5787fa49 152 } *devices;
56eedc1a 153 int *best = NULL; /* indexed by raid_disk */
98c6faba
NB
154 unsigned int bestcnt = 0;
155 int devcnt = 0;
156 unsigned int okcnt, sparecnt;
157 unsigned int req_cnt;
158 unsigned int i;
64c4757e 159 int most_recent = 0;
cd29a5c8 160 int chosen_drive;
52826846 161 int change = 0;
cd29a5c8 162 int inargv = 0;
52437b4f 163 int report_missmatch;
bf4fb153 164 int bitmap_done;
7f91af49
N
165 int start_partial_ok = (runstop >= 0) &&
166 (force || devlist==NULL || auto_assem);
98c6faba 167 unsigned int num_devs;
5787fa49 168 mddev_dev_t tmpdev;
4b1ac34b 169 struct mdinfo info;
98dbd966 170 struct mdinfo *content = NULL;
265e0f17 171 char *avail;
308e1801 172 int nextspare = 0;
197e3eb6 173 char *name = NULL;
69207ff6 174 int trustworthy;
a04d5763 175 char chosen_name[1024];
8a46fe84 176
682c7051 177 if (get_linux_version() < 2004000)
64c4757e
NB
178 old_linux = 1;
179
64c4757e 180 /*
52826846
NB
181 * If any subdevs are listed, then any that don't
182 * match ident are discarded. Remainder must all match and
183 * become the array.
184 * If no subdevs, then we scan all devices in the config file, but
185 * there must be something in the identity
64c4757e 186 */
64c4757e 187
cd29a5c8 188 if (!devlist &&
52826846
NB
189 ident->uuid_set == 0 &&
190 ident->super_minor < 0 &&
191 ident->devices == NULL) {
192 fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
8a46fe84 193 mddev ? mddev : "further assembly");
52826846 194 return 1;
64c4757e 195 }
71d60c48 196
cd29a5c8 197 if (devlist == NULL)
8aec876d 198 devlist = conf_get_devs();
7f91af49 199 else if (mddev)
da6b5ca9 200 inargv = 1;
64c4757e 201
52437b4f 202 report_missmatch = ((inargv && verbose >= 0) || verbose > 0);
60e1bc1a 203 try_again:
c30e5369
N
204 /* We come back here when doing auto-assembly and attempting some
205 * set of devices failed. Those are now marked as ->used==2 and
206 * we ignore them and try again
207 */
60e1bc1a 208
5787fa49
NB
209 tmpdev = devlist; num_devs = 0;
210 while (tmpdev) {
da6b5ca9
NB
211 if (tmpdev->used)
212 tmpdev->used = 2;
213 else
214 num_devs++;
5787fa49
NB
215 tmpdev = tmpdev->next;
216 }
5787fa49
NB
217 devices = malloc(num_devs * sizeof(*devices));
218
82d9eba6 219 if (!st && ident->st) st = ident->st;
64c4757e 220
dab6685f 221 if (verbose>0)
82b27616 222 fprintf(stderr, Name ": looking for devices for %s\n",
8a46fe84 223 mddev ? mddev : "further assembly");
82b27616 224
811e6cbe
NB
225 /* first walk the list of devices to find a consistent set
226 * that match the criterea, if that is possible.
c30e5369 227 * We flag the ones we like with 'used'.
811e6cbe
NB
228 */
229 for (tmpdev = devlist;
230 tmpdev;
231 tmpdev = tmpdev->next) {
232 char *devname = tmpdev->devname;
64c4757e
NB
233 int dfd;
234 struct stat stb;
3da92f27 235 struct supertype *tst = dup_super(st);
52826846 236
da6b5ca9
NB
237 if (tmpdev->used > 1) continue;
238
52826846 239 if (ident->devices &&
56eedc1a 240 !match_oneof(ident->devices, devname)) {
52437b4f 241 if (report_missmatch)
56eedc1a 242 fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
52826846 243 continue;
56eedc1a 244 }
4b1ac34b 245
8b0dabea 246 dfd = dev_open(devname, O_RDONLY|O_EXCL);
64c4757e 247 if (dfd < 0) {
52437b4f 248 if (report_missmatch)
682c7051 249 fprintf(stderr, Name ": cannot open device %s: %s\n",
64c4757e 250 devname, strerror(errno));
da6b5ca9 251 tmpdev->used = 2;
52826846
NB
252 } else if (fstat(dfd, &stb)< 0) {
253 /* Impossible! */
254 fprintf(stderr, Name ": fstat failed for %s: %s\n",
255 devname, strerror(errno));
da6b5ca9 256 tmpdev->used = 2;
cd29a5c8
NB
257 } else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
258 fprintf(stderr, Name ": %s is not a block device.\n",
52826846 259 devname);
da6b5ca9 260 tmpdev->used = 2;
82d9eba6 261 } else if (!tst && (tst = guess_super(dfd)) == NULL) {
52437b4f 262 if (report_missmatch)
da6b5ca9
NB
263 fprintf(stderr, Name ": no recogniseable superblock on %s\n",
264 devname);
265 tmpdev->used = 2;
3da92f27 266 } else if (tst->ss->load_super(tst,dfd, NULL)) {
52437b4f 267 if (report_missmatch)
682c7051 268 fprintf( stderr, Name ": no RAID superblock on %s\n",
64c4757e 269 devname);
52826846 270 } else {
98dbd966
DW
271 content = &info;
272 memset(content, 0, sizeof(*content));
273 tst->ss->getinfo_super(tst, content);
64c4757e 274 }
c06487ce 275 if (dfd >= 0) close(dfd);
52826846 276
9008ed1c
N
277 if (tst && tst->sb && tst->ss->container_content
278 && tst->loaded_container) {
279 /* tmpdev is a container. We need to be either
280 * looking for a member, or auto-assembling
281 */
282 if (st) {
283 /* already found some components, this cannot
284 * be another one.
285 */
286 if (report_missmatch)
287 fprintf(stderr, Name ": %s is a container, but we are looking for components\n",
288 devname);
289 goto loop;
290 }
291
292 if (ident->container) {
293 if (ident->container[0] == '/' &&
294 !same_dev(ident->container, devname)) {
295 if (report_missmatch)
296 fprintf(stderr, Name ": %s is not the container required (%s)\n",
297 devname, ident->container);
298 goto loop;
299 }
300 if (ident->container[0] != '/') {
301 /* we have a uuid */
302 int uuid[4];
303 if (!parse_uuid(ident->container, uuid) ||
304 !same_uuid(content->uuid, uuid, tst->ss->swapuuid)) {
305 if (report_missmatch)
306 fprintf(stderr, Name ": %s has wrong UUID to be required container\n",
307 devname);
308 goto loop;
309 }
310 }
311 }
312 /* It is worth looking inside this container.
313 */
314 next_member:
315 if (tmpdev->content)
316 content = tmpdev->content;
317 else
318 content = tst->ss->container_content(tst);
319
320 tmpdev->content = content->next;
321 if (tmpdev->content == NULL)
f7ad3ccc 322 tmpdev->used = 2;
9008ed1c
N
323
324 } else if (ident->container || ident->member) {
325 /* No chance of this matching if we don't have
326 * a container */
327 if (report_missmatch)
328 fprintf(stderr, Name "%s is not a container, and one is required.\n",
329 devname);
330 goto loop;
331 }
332
838acbc2 333 if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) &&
3da92f27 334 (!tst || !tst->sb ||
98dbd966 335 same_uuid(content->uuid, ident->uuid, tst->ss->swapuuid)==0)) {
52437b4f 336 if (report_missmatch)
52826846
NB
337 fprintf(stderr, Name ": %s has wrong uuid.\n",
338 devname);
df37ffc0 339 goto loop;
82b27616 340 }
c4f12c13 341 if (ident->name[0] && (!update || strcmp(update, "name")!= 0) &&
3da92f27 342 (!tst || !tst->sb ||
98dbd966 343 name_matches(content->name, ident->name, homehost)==0)) {
52437b4f 344 if (report_missmatch)
947fd4dd
NB
345 fprintf(stderr, Name ": %s has wrong name.\n",
346 devname);
df37ffc0 347 goto loop;
947fd4dd 348 }
98c6faba 349 if (ident->super_minor != UnSet &&
3da92f27 350 (!tst || !tst->sb ||
98dbd966 351 ident->super_minor != content->array.md_minor)) {
52437b4f 352 if (report_missmatch)
52826846 353 fprintf(stderr, Name ": %s has wrong super-minor.\n",
64c4757e 354 devname);
df37ffc0 355 goto loop;
64c4757e 356 }
98c6faba 357 if (ident->level != UnSet &&
3da92f27 358 (!tst || !tst->sb ||
98dbd966 359 ident->level != content->array.level)) {
52437b4f 360 if (report_missmatch)
cd29a5c8
NB
361 fprintf(stderr, Name ": %s has wrong raid level.\n",
362 devname);
df37ffc0 363 goto loop;
cd29a5c8 364 }
98c6faba 365 if (ident->raid_disks != UnSet &&
3da92f27 366 (!tst || !tst->sb ||
98dbd966 367 ident->raid_disks!= content->array.raid_disks)) {
52437b4f 368 if (report_missmatch)
cd29a5c8
NB
369 fprintf(stderr, Name ": %s requires wrong number of drives.\n",
370 devname);
df37ffc0 371 goto loop;
cd29a5c8 372 }
c30e5369 373 if (auto_assem) {
3da92f27 374 if (tst == NULL || tst->sb == NULL)
da6b5ca9 375 continue;
da6b5ca9 376 }
83b6208e 377 /* If we are this far, then we are nearly commited to this device.
52826846 378 * If the super_block doesn't exist, or doesn't match others,
83b6208e
NB
379 * then we probably cannot continue
380 * However if one of the arrays is for the homehost, and
381 * the other isn't that can disambiguate.
52826846 382 */
52826846 383
3da92f27 384 if (!tst || !tst->sb) {
52826846
NB
385 fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
386 devname);
ddd1a492
NB
387 if (st)
388 st->ss->free_super(st);
52826846
NB
389 return 1;
390 }
838acbc2 391
9008ed1c
N
392 if (tst && tst->sb && tst->ss->container_content
393 && tst->loaded_container) {
394 /* we have the one container we need, don't keep
395 * looking. If the chosen member is active, skip.
396 */
397 if (is_member_busy(content->text_version)) {
f7ad3ccc
N
398 if (report_missmatch)
399 fprintf(stderr, Name ": member %s in %s is already assembled\n",
400 content->text_version,
401 devname);
402 tst->ss->free_super(tst);
403 tst = NULL;
404 content = NULL;
9008ed1c
N
405 if (auto_assem)
406 goto loop;
9008ed1c
N
407 return 1;
408 }
409 st = tst; tst = NULL;
410 if (!auto_assem && tmpdev->next != NULL) {
411 fprintf(stderr, Name ": %s is a container, but is not "
412 "only device given: confused and aborting\n",
413 devname);
414 st->ss->free_super(st);
415 return 1;
416 }
417 break;
418 }
83b6208e 419 if (st == NULL)
3da92f27
NB
420 st = dup_super(tst);
421 if (st->minor_version == -1)
422 st->minor_version = tst->minor_version;
83b6208e
NB
423 if (st->ss != tst->ss ||
424 st->minor_version != tst->minor_version ||
64557c33 425 st->ss->compare_super(st, tst) != 0) {
83b6208e 426 /* Some mismatch. If exactly one array matches this host,
da6b5ca9
NB
427 * we can resolve on that one.
428 * Or, if we are auto assembling, we just ignore the second
429 * for now.
83b6208e 430 */
c30e5369 431 if (auto_assem)
df37ffc0 432 goto loop;
83b6208e 433 if (homehost) {
3da92f27
NB
434 int first = st->ss->match_home(st, homehost);
435 int last = tst->ss->match_home(tst, homehost);
9362c1c8
N
436 if (first != last &&
437 (first == 1 || last == 1)) {
83b6208e
NB
438 /* We can do something */
439 if (first) {/* just ignore this one */
52437b4f 440 if (report_missmatch)
83b6208e
NB
441 fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
442 devname);
df37ffc0 443 goto loop;
83b6208e
NB
444 } else { /* reject all those sofar */
445 mddev_dev_t td;
52437b4f 446 if (report_missmatch)
83b6208e
NB
447 fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
448 devname);
449 for (td=devlist; td != tmpdev; td=td->next)
450 if (td->used == 1)
451 td->used = 0;
452 tmpdev->used = 1;
df37ffc0 453 goto loop;
83b6208e
NB
454 }
455 }
456 }
52826846
NB
457 fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
458 devname);
3da92f27
NB
459 tst->ss->free_super(tst);
460 st->ss->free_super(st);
52826846 461 return 1;
64c4757e
NB
462 }
463
811e6cbe 464 tmpdev->used = 1;
df37ffc0
NB
465
466 loop:
9008ed1c
N
467 if (tmpdev->content)
468 goto next_member;
3d2b16e7
NB
469 if (tst)
470 tst->ss->free_super(tst);
811e6cbe
NB
471 }
472
98dbd966 473 if (!st || !st->sb || !content)
c30e5369
N
474 return 2;
475
69207ff6 476 /* Now need to open array the device. Use create_mddev */
98dbd966
DW
477 if (content == &info)
478 st->ss->getinfo_super(st, content);
3d2c4fc7 479
69207ff6
N
480 trustworthy = FOREIGN;
481 switch (st->ss->match_home(st, homehost)) {
482 case 0:
483 trustworthy = FOREIGN;
98dbd966 484 name = content->name;
69207ff6
N
485 break;
486 case 1:
487 trustworthy = LOCAL;
98dbd966 488 name = strchr(content->name, ':');
69207ff6
N
489 if (name)
490 name++;
3d2c4fc7 491 else
98dbd966 492 name = content->name;
69207ff6
N
493 break;
494 case -1:
a4bc1720 495 trustworthy = FOREIGN;
69207ff6 496 break;
c30e5369 497 }
ac2ecf55
N
498 if (!auto_assem && trustworthy == FOREIGN)
499 /* If the array is listed in mdadm or on
500 * command line, then we trust the name
501 * even if the array doesn't look local
502 */
503 trustworthy = LOCAL;
504
98dbd966
DW
505 if (content->name[0] == 0 &&
506 content->array.level == LEVEL_CONTAINER) {
507 name = content->text_version;
a4bc1720
N
508 trustworthy = METADATA;
509 }
a04d5763
N
510 mdfd = create_mddev(mddev, name, ident->autof, trustworthy,
511 chosen_name);
c30e5369
N
512 if (mdfd < 0) {
513 st->ss->free_super(st);
514 free(devices);
515 if (auto_assem)
60e1bc1a 516 goto try_again;
c30e5369
N
517 return 1;
518 }
a04d5763 519 mddev = chosen_name;
c30e5369
N
520 vers = md_get_version(mdfd);
521 if (vers < 9000) {
522 fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
523 " Upgrade your kernel or try --build\n");
524 close(mdfd);
525 return 1;
526 }
66afdfa9 527 if (mddev_busy(fd2devnum(mdfd))) {
c30e5369
N
528 fprintf(stderr, Name ": %s already active, cannot restart it!\n",
529 mddev);
530 for (tmpdev = devlist ;
531 tmpdev && tmpdev->used != 1;
532 tmpdev = tmpdev->next)
533 ;
534 if (tmpdev && auto_assem)
535 fprintf(stderr, Name ": %s needed for %s...\n",
536 mddev, tmpdev->devname);
537 close(mdfd);
538 mdfd = -3;
539 st->ss->free_super(st);
540 free(devices);
541 if (auto_assem)
542 goto try_again;
543 return 1;
8a46fe84 544 }
c30e5369 545 ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
8a46fe84 546
9008ed1c
N
547#ifndef MDASSEMBLE
548 if (content != &info) {
549 /* This is a member of a container. Try starting the array. */
550 return assemble_container_content(st, mdfd, content, runstop,
551 chosen_name, verbose);
552 }
553#endif
811e6cbe 554 /* Ok, no bad inconsistancy, we can try updating etc */
bf4fb153 555 bitmap_done = 0;
da6b5ca9 556 for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) {
811e6cbe
NB
557 char *devname = tmpdev->devname;
558 struct stat stb;
5787fa49 559 /* looks like a good enough match to update the super block if needed */
d1f1011b 560#ifndef MDASSEMBLE
5787fa49 561 if (update) {
811e6cbe 562 int dfd;
4b1ac34b
NB
563 /* prepare useful information in info structures */
564 struct stat stb2;
3da92f27 565 struct supertype *tst;
4b1ac34b 566 fstat(mdfd, &stb2);
7d99579f
NB
567
568 if (strcmp(update, "uuid")==0 &&
569 !ident->uuid_set) {
570 int rfd;
571 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
572 read(rfd, ident->uuid, 16) != 16) {
573 *(__u32*)(ident->uuid) = random();
574 *(__u32*)(ident->uuid+1) = random();
575 *(__u32*)(ident->uuid+2) = random();
576 *(__u32*)(ident->uuid+3) = random();
577 }
578 if (rfd >= 0) close(rfd);
7d99579f 579 }
811e6cbe
NB
580 dfd = dev_open(devname, O_RDWR|O_EXCL);
581
0430ed48
NB
582 remove_partitions(dfd);
583
3da92f27
NB
584 tst = dup_super(st);
585 tst->ss->load_super(tst, dfd, NULL);
98dbd966 586 tst->ss->getinfo_super(tst, content);
811e6cbe 587
98dbd966
DW
588 memcpy(content->uuid, ident->uuid, 16);
589 strcpy(content->name, ident->name);
590 content->array.md_minor = minor(stb2.st_rdev);
811e6cbe 591
98dbd966 592 tst->ss->update_super(tst, content, update,
3da92f27
NB
593 devname, verbose,
594 ident->uuid_set, homehost);
e5eac01f
NB
595 if (strcmp(update, "uuid")==0 &&
596 !ident->uuid_set) {
597 ident->uuid_set = 1;
98dbd966 598 memcpy(ident->uuid, content->uuid, 16);
e5eac01f 599 }
b8a8ccf9 600 if (dfd < 0)
5787fa49
NB
601 fprintf(stderr, Name ": Cannot open %s for superblock update\n",
602 devname);
3da92f27 603 else if (tst->ss->store_super(tst, dfd))
5787fa49
NB
604 fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
605 devname);
606 if (dfd >= 0)
607 close(dfd);
8131b493
NB
608
609 if (strcmp(update, "uuid")==0 &&
bf4fb153 610 ident->bitmap_fd >= 0 && !bitmap_done) {
3da92f27 611 if (bitmap_update_uuid(ident->bitmap_fd,
98dbd966 612 content->uuid,
3da92f27 613 tst->ss->swapuuid) != 0)
bf4fb153
NB
614 fprintf(stderr, Name ": Could not update uuid on external bitmap.\n");
615 else
616 bitmap_done = 1;
617 }
3da92f27 618 tst->ss->free_super(tst);
d1f1011b
NB
619 } else
620#endif
621 {
30e1b9a5 622 struct supertype *tst = dup_super(st);
da6b5ca9
NB
623 int dfd;
624 dfd = dev_open(devname, O_RDWR|O_EXCL);
625
0430ed48
NB
626 remove_partitions(dfd);
627
3da92f27 628 tst->ss->load_super(tst, dfd, NULL);
98dbd966 629 tst->ss->getinfo_super(tst, content);
3da92f27 630 tst->ss->free_super(tst);
da6b5ca9 631 close(dfd);
5787fa49
NB
632 }
633
811e6cbe
NB
634 stat(devname, &stb);
635
dab6685f 636 if (verbose > 0)
cd29a5c8 637 fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
98dbd966 638 devname, mddev, content->disk.raid_disk);
64c4757e 639 devices[devcnt].devname = devname;
64c4757e 640 devices[devcnt].uptodate = 0;
98dbd966 641 devices[devcnt].i = *content;
213ee40b
NB
642 devices[devcnt].i.disk.major = major(stb.st_rdev);
643 devices[devcnt].i.disk.minor = minor(stb.st_rdev);
64c4757e 644 if (most_recent < devcnt) {
213ee40b
NB
645 if (devices[devcnt].i.events
646 > devices[most_recent].i.events)
64c4757e
NB
647 most_recent = devcnt;
648 }
98dbd966 649 if (content->array.level == -4)
5787fa49
NB
650 /* with multipath, the raid_disk from the superblock is meaningless */
651 i = devcnt;
652 else
213ee40b 653 i = devices[devcnt].i.disk.raid_disk;
308e1801 654 if (i+1 == 0) {
98dbd966
DW
655 if (nextspare < content->array.raid_disks)
656 nextspare = content->array.raid_disks;
308e1801 657 i = nextspare++;
08110d41 658 } else {
98dbd966 659 if (i >= content->array.raid_disks &&
08110d41
NB
660 i >= nextspare)
661 nextspare = i+1;
308e1801 662 }
98c6faba 663 if (i < 10000) {
56eedc1a 664 if (i >= bestcnt) {
98c6faba 665 unsigned int newbestcnt = i+10;
56eedc1a 666 int *newbest = malloc(sizeof(int)*newbestcnt);
98c6faba 667 unsigned int c;
56eedc1a
NB
668 for (c=0; c < newbestcnt; c++)
669 if (c < bestcnt)
670 newbest[c] = best[c];
671 else
672 newbest[c] = -1;
673 if (best)free(best);
674 best = newbest;
675 bestcnt = newbestcnt;
676 }
6a255b69 677 if (best[i] >=0 &&
213ee40b
NB
678 devices[best[i]].i.events
679 == devices[devcnt].i.events
680 && (devices[best[i]].i.disk.minor
681 != devices[devcnt].i.disk.minor)
b8ac1967 682 && st->ss == &super0
98dbd966 683 && content->array.level != LEVEL_MULTIPATH) {
6a255b69
NB
684 /* two different devices with identical superblock.
685 * Could be a mis-detection caused by overlapping
686 * partitions. fail-safe.
687 */
688 fprintf(stderr, Name ": WARNING %s and %s appear"
689 " to have very similar superblocks.\n"
690 " If they are really different, "
691 "please --zero the superblock on one\n"
d2df86e0
NB
692 " If they are the same or overlap,"
693 " please remove one from %s.\n",
694 devices[best[i]].devname, devname,
695 inargv ? "the list" :
696 "the\n DEVICE list in mdadm.conf"
697 );
7f91af49 698 close(mdfd);
6a255b69
NB
699 return 1;
700 }
52826846 701 if (best[i] == -1
213ee40b
NB
702 || (devices[best[i]].i.events
703 < devices[devcnt].i.events))
52826846 704 best[i] = devcnt;
56eedc1a 705 }
64c4757e 706 devcnt++;
df37ffc0 707 }
4b1ac34b 708
64c4757e 709 if (devcnt == 0) {
682c7051 710 fprintf(stderr, Name ": no devices found for %s\n",
64c4757e 711 mddev);
3d2b16e7
NB
712 if (st)
713 st->ss->free_super(st);
7f91af49 714 close(mdfd);
64c4757e
NB
715 return 1;
716 }
4b1ac34b 717
3d2b16e7
NB
718 if (update && strcmp(update, "byteorder")==0)
719 st->minor_version = 90;
720
98dbd966
DW
721 st->ss->getinfo_super(st, content);
722 clean = content->array.state & 1;
4b1ac34b 723
64c4757e
NB
724 /* now we have some devices that might be suitable.
725 * I wonder how many
726 */
98dbd966
DW
727 avail = malloc(content->array.raid_disks);
728 memset(avail, 0, content->array.raid_disks);
64c4757e 729 okcnt = 0;
52826846 730 sparecnt=0;
56eedc1a 731 for (i=0; i< bestcnt ;i++) {
64c4757e 732 int j = best[i];
ee04451c
NB
733 int event_margin = 1; /* always allow a difference of '1'
734 * like the kernel does
735 */
64c4757e 736 if (j < 0) continue;
d013a55e
NB
737 /* note: we ignore error flags in multipath arrays
738 * as they don't make sense
739 */
98dbd966 740 if (content->array.level != -4)
213ee40b
NB
741 if (!(devices[j].i.disk.state & (1<<MD_DISK_SYNC))) {
742 if (!(devices[j].i.disk.state
743 & (1<<MD_DISK_FAULTY)))
aa88f531 744 sparecnt++;
d013a55e 745 continue;
aa88f531 746 }
213ee40b
NB
747 if (devices[j].i.events+event_margin >=
748 devices[most_recent].i.events) {
64c4757e 749 devices[j].uptodate = 1;
98dbd966 750 if (i < content->array.raid_disks) {
52826846 751 okcnt++;
265e0f17
NB
752 avail[i]=1;
753 } else
52826846 754 sparecnt++;
64c4757e
NB
755 }
756 }
98dbd966
DW
757 while (force && !enough(content->array.level, content->array.raid_disks,
758 content->array.layout, 1,
265e0f17 759 avail, okcnt)) {
64c4757e
NB
760 /* Choose the newest best drive which is
761 * not up-to-date, update the superblock
762 * and add it.
763 */
52826846 764 int fd;
3da92f27 765 struct supertype *tst;
c5a6f9a6 766 long long current_events;
cd29a5c8 767 chosen_drive = -1;
98dbd966 768 for (i=0; i<content->array.raid_disks && i < bestcnt; i++) {
52826846
NB
769 int j = best[i];
770 if (j>=0 &&
771 !devices[j].uptodate &&
52826846 772 (chosen_drive < 0 ||
213ee40b
NB
773 devices[j].i.events
774 > devices[chosen_drive].i.events))
52826846
NB
775 chosen_drive = j;
776 }
777 if (chosen_drive < 0)
778 break;
213ee40b 779 current_events = devices[chosen_drive].i.events;
c5a6f9a6 780 add_another:
dab6685f
NB
781 if (verbose >= 0)
782 fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
213ee40b
NB
783 devices[chosen_drive].devname,
784 devices[chosen_drive].i.disk.raid_disk,
785 (int)(devices[chosen_drive].i.events),
786 (int)(devices[most_recent].i.events));
8b0dabea 787 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
52826846
NB
788 if (fd < 0) {
789 fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
790 devices[chosen_drive].devname);
213ee40b 791 devices[chosen_drive].i.events = 0;
52826846
NB
792 continue;
793 }
3da92f27 794 tst = dup_super(st);
60b435db 795 if (tst->ss->load_super(tst,fd, NULL)) {
52826846
NB
796 close(fd);
797 fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
798 devices[chosen_drive].devname);
213ee40b 799 devices[chosen_drive].i.events = 0;
52826846
NB
800 continue;
801 }
98dbd966
DW
802 content->events = devices[most_recent].i.events;
803 tst->ss->update_super(tst, content, "force-one",
67a8c82d
NB
804 devices[chosen_drive].devname, verbose,
805 0, NULL);
4b1ac34b 806
3da92f27 807 if (tst->ss->store_super(tst, fd)) {
52826846
NB
808 close(fd);
809 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
810 devices[chosen_drive].devname);
213ee40b 811 devices[chosen_drive].i.events = 0;
3da92f27 812 tst->ss->free_super(tst);
52826846
NB
813 continue;
814 }
815 close(fd);
213ee40b 816 devices[chosen_drive].i.events = devices[most_recent].i.events;
52826846 817 devices[chosen_drive].uptodate = 1;
265e0f17 818 avail[chosen_drive] = 1;
52826846 819 okcnt++;
3da92f27 820 tst->ss->free_super(tst);
c5a6f9a6
NB
821
822 /* If there are any other drives of the same vintage,
823 * add them in as well. We can't lose and we might gain
824 */
98dbd966 825 for (i=0; i<content->array.raid_disks && i < bestcnt ; i++) {
c5a6f9a6
NB
826 int j = best[i];
827 if (j >= 0 &&
828 !devices[j].uptodate &&
213ee40b 829 devices[j].i.events == current_events) {
c5a6f9a6
NB
830 chosen_drive = j;
831 goto add_another;
832 }
833 }
64c4757e 834 }
52826846
NB
835
836 /* Now we want to look at the superblock which the kernel will base things on
837 * and compare the devices that we think are working with the devices that the
838 * superblock thinks are working.
839 * If there are differences and --force is given, then update this chosen
840 * superblock.
841 */
cd29a5c8 842 chosen_drive = -1;
3da92f27 843 st->ss->free_super(st);
56eedc1a 844 for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
52826846
NB
845 int j = best[i];
846 int fd;
4b1ac34b 847
52826846
NB
848 if (j<0)
849 continue;
850 if (!devices[j].uptodate)
851 continue;
852 chosen_drive = j;
8b0dabea 853 if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
52826846
NB
854 fprintf(stderr, Name ": Cannot open %s: %s\n",
855 devices[j].devname, strerror(errno));
7f91af49 856 close(mdfd);
52826846
NB
857 return 1;
858 }
3da92f27 859 if (st->ss->load_super(st,fd, NULL)) {
52826846
NB
860 close(fd);
861 fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
862 devices[j].devname);
7f91af49 863 close(mdfd);
52826846
NB
864 return 1;
865 }
866 close(fd);
867 }
3da92f27 868 if (st->sb == NULL) {
4b1ac34b 869 fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
7f91af49 870 close(mdfd);
4b1ac34b
NB
871 return 1;
872 }
98dbd966 873 st->ss->getinfo_super(st, content);
f35f2525 874#ifndef MDASSEMBLE
98dbd966 875 sysfs_init(content, mdfd, 0);
f35f2525 876#endif
56eedc1a 877 for (i=0; i<bestcnt; i++) {
52826846 878 int j = best[i];
98c6faba 879 unsigned int desired_state;
11a3e71d 880
98dbd966 881 if (i < content->array.raid_disks)
11a3e71d
NB
882 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
883 else
884 desired_state = 0;
885
52826846
NB
886 if (j<0)
887 continue;
888 if (!devices[j].uptodate)
889 continue;
4b1ac34b 890
213ee40b 891 devices[j].i.disk.state = desired_state;
4e9a6ff7
N
892 if (!(devices[j].i.array.state & 1))
893 clean = 0;
213ee40b
NB
894
895 if (st->ss->update_super(st, &devices[j].i, "assemble", NULL,
68c7d6d7 896 verbose, 0, NULL)) {
52826846 897 if (force) {
dab6685f
NB
898 if (verbose >= 0)
899 fprintf(stderr, Name ": "
900 "clearing FAULTY flag for device %d in %s for %s\n",
901 j, mddev, devices[j].devname);
4b1ac34b 902 change = 1;
52826846 903 } else {
dab6685f
NB
904 if (verbose >= -1)
905 fprintf(stderr, Name ": "
906 "device %d in %s has wrong state in superblock, but %s seems ok\n",
907 i, mddev, devices[j].devname);
52826846
NB
908 }
909 }
4b1ac34b 910#if 0
213ee40b 911 if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) {
52826846
NB
912 fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
913 i, mddev);
914 }
4b1ac34b 915#endif
52826846 916 }
c5a6f9a6 917 if (force && !clean &&
98dbd966
DW
918 !enough(content->array.level, content->array.raid_disks,
919 content->array.layout, clean,
c5a6f9a6 920 avail, okcnt)) {
98dbd966 921 change += st->ss->update_super(st, content, "force-array",
67a8c82d
NB
922 devices[chosen_drive].devname, verbose,
923 0, NULL);
583315d9 924 clean = 1;
d013a55e 925 }
52826846 926
4b1ac34b 927 if (change) {
52826846 928 int fd;
8b0dabea 929 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
52826846 930 if (fd < 0) {
353632d9 931 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
52826846 932 devices[chosen_drive].devname);
7f91af49 933 close(mdfd);
52826846
NB
934 return 1;
935 }
3da92f27 936 if (st->ss->store_super(st, fd)) {
52826846
NB
937 close(fd);
938 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
939 devices[chosen_drive].devname);
7f91af49 940 close(mdfd);
52826846
NB
941 return 1;
942 }
943 close(fd);
52826846
NB
944 }
945
353632d9
NB
946 /* If we are in the middle of a reshape we may need to restore saved data
947 * that was moved aside due to the reshape overwriting live data
948 * The code of doing this lives in Grow.c
949 */
39c5a909 950#ifndef MDASSEMBLE
98dbd966 951 if (content->reshape_active) {
353632d9
NB
952 int err = 0;
953 int *fdlist = malloc(sizeof(int)* bestcnt);
954 for (i=0; i<bestcnt; i++) {
955 int j = best[i];
956 if (j >= 0) {
957 fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL);
958 if (fdlist[i] < 0) {
959 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
960 devices[j].devname);
961 err = 1;
962 break;
963 }
964 } else
965 fdlist[i] = -1;
966 }
967 if (!err)
98dbd966 968 err = Grow_restart(st, content, fdlist, bestcnt, backup_file);
353632d9
NB
969 while (i>0) {
970 i--;
971 if (fdlist[i]>=0) close(fdlist[i]);
972 }
973 if (err) {
974 fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n");
7f91af49 975 close(mdfd);
353632d9
NB
976 return err;
977 }
978 }
39c5a909 979#endif
aa88f531
NB
980 /* count number of in-sync devices according to the superblock.
981 * We must have this number to start the array without -s or -R
982 */
98dbd966 983 req_cnt = content->array.working_disks;
aa88f531 984
64c4757e
NB
985 /* Almost ready to actually *do* something */
986 if (!old_linux) {
fbf8a0b7 987 int rv;
a19c88b8 988
a04d5763
N
989 /* First, fill in the map, so that udev can find our name
990 * as soon as we become active.
991 */
98dbd966
DW
992 map_update(NULL, fd2devnum(mdfd), content->text_version,
993 content->uuid, chosen_name);
a04d5763 994
98dbd966 995 rv = set_array_info(mdfd, st, content);
fbf8a0b7 996 if (rv) {
f35f2525 997 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
64c4757e 998 mddev, strerror(errno));
7f91af49 999 close(mdfd);
64c4757e
NB
1000 return 1;
1001 }
11484a63 1002 if (ident->bitmap_fd >= 0) {
c82f047c
NB
1003 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
1004 fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
7f91af49 1005 close(mdfd);
c82f047c
NB
1006 return 1;
1007 }
7ef02d01
NB
1008 } else if (ident->bitmap_file) {
1009 /* From config file */
1010 int bmfd = open(ident->bitmap_file, O_RDWR);
1011 if (bmfd < 0) {
1012 fprintf(stderr, Name ": Could not open bitmap file %s\n",
1013 ident->bitmap_file);
7f91af49 1014 close(mdfd);
7ef02d01
NB
1015 return 1;
1016 }
1017 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
1018 fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
1019 close(bmfd);
7f91af49 1020 close(mdfd);
7ef02d01
NB
1021 return 1;
1022 }
1023 close(bmfd);
c82f047c 1024 }
7ef02d01 1025
52826846 1026 /* First, add the raid disks, but add the chosen one last */
56eedc1a 1027 for (i=0; i<= bestcnt; i++) {
52826846 1028 int j;
56eedc1a 1029 if (i < bestcnt) {
52826846
NB
1030 j = best[i];
1031 if (j == chosen_drive)
1032 continue;
1033 } else
1034 j = chosen_drive;
1035
56eedc1a 1036 if (j >= 0 /* && devices[j].uptodate */) {
98dbd966 1037 rv = add_disk(mdfd, st, content, &devices[j].i);
7801ac20 1038
a19c88b8 1039 if (rv) {
213ee40b
NB
1040 fprintf(stderr, Name ": failed to add "
1041 "%s to %s: %s\n",
64c4757e
NB
1042 devices[j].devname,
1043 mddev,
1044 strerror(errno));
98dbd966 1045 if (i < content->array.raid_disks
213ee40b 1046 || i == bestcnt)
52826846
NB
1047 okcnt--;
1048 else
1049 sparecnt--;
dab6685f 1050 } else if (verbose > 0)
213ee40b
NB
1051 fprintf(stderr, Name ": added %s "
1052 "to %s as %d\n",
1053 devices[j].devname, mddev,
1054 devices[j].i.disk.raid_disk);
98dbd966 1055 } else if (verbose > 0 && i < content->array.raid_disks)
213ee40b
NB
1056 fprintf(stderr, Name ": no uptodate device for "
1057 "slot %d of %s\n",
64c4757e
NB
1058 i, mddev);
1059 }
aba69144 1060
98dbd966 1061 if (content->array.level == LEVEL_CONTAINER) {
598f0d58
NB
1062 if (verbose >= 0) {
1063 fprintf(stderr, Name ": Container %s has been "
1064 "assembled with %d drive%s",
57ed8c91 1065 mddev, okcnt+sparecnt, okcnt+sparecnt==1?"":"s");
98dbd966 1066 if (okcnt < content->array.raid_disks)
598f0d58 1067 fprintf(stderr, " (out of %d)",
98dbd966 1068 content->array.raid_disks);
598f0d58
NB
1069 fprintf(stderr, "\n");
1070 }
98dbd966 1071 sysfs_uevent(content, "change");
a7c6e3fb 1072 wait_for(chosen_name, mdfd);
7f91af49 1073 close(mdfd);
598f0d58
NB
1074 return 0;
1075 }
1076
64c4757e 1077 if (runstop == 1 ||
b8a8ccf9 1078 (runstop <= 0 &&
98dbd966
DW
1079 ( enough(content->array.level, content->array.raid_disks,
1080 content->array.layout, clean, avail, okcnt) &&
aa88f531
NB
1081 (okcnt >= req_cnt || start_partial_ok)
1082 ))) {
82b27616 1083 if (ioctl(mdfd, RUN_ARRAY, NULL)==0) {
dab6685f
NB
1084 if (verbose >= 0) {
1085 fprintf(stderr, Name ": %s has been started with %d drive%s",
1086 mddev, okcnt, okcnt==1?"":"s");
98dbd966
DW
1087 if (okcnt < content->array.raid_disks)
1088 fprintf(stderr, " (out of %d)", content->array.raid_disks);
dab6685f
NB
1089 if (sparecnt)
1090 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1091 fprintf(stderr, ".\n");
1092 }
8a659c33
N
1093 if (content->reshape_active &&
1094 content->array.level >= 4 &&
1095 content->array.level <= 6) {
acee8e89
N
1096 /* might need to increase the size
1097 * of the stripe cache - default is 256
1098 */
8a659c33 1099 if (256 < 4 * (content->array.chunk_size/4096)) {
acee8e89
N
1100 struct mdinfo *sra = sysfs_read(mdfd, 0, 0);
1101 if (sra)
1102 sysfs_set_num(sra, NULL,
1103 "stripe_cache_size",
8a659c33 1104 (4 * content->array.chunk_size / 4096) + 1);
acee8e89
N
1105 }
1106 }
a7c6e3fb 1107 wait_for(mddev, mdfd);
7f91af49
N
1108 close(mdfd);
1109 if (auto_assem) {
589395d6 1110 int usecs = 1;
589395d6
NB
1111 /* There is a nasty race with 'mdadm --monitor'.
1112 * If it opens this device before we close it,
1113 * it gets an incomplete open on which IO
598f0d58
NB
1114 * doesn't work and the capacity is
1115 * wrong.
589395d6
NB
1116 * If we reopen (to check for layered devices)
1117 * before --monitor closes, we loose.
1118 *
1119 * So: wait upto 1 second for there to be
1120 * a non-zero capacity.
1121 */
1122 while (usecs < 1000) {
1123 mdfd = open(mddev, O_RDONLY);
1124 if (mdfd >= 0) {
beae1dfe
NB
1125 unsigned long long size;
1126 if (get_dev_size(mdfd, NULL, &size) &&
589395d6
NB
1127 size > 0)
1128 break;
1129 close(mdfd);
1130 }
1131 usleep(usecs);
1132 usecs <<= 1;
1133 }
1134 }
64c4757e 1135 return 0;
82b27616 1136 }
682c7051 1137 fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
64c4757e 1138 mddev, strerror(errno));
583315d9 1139
98dbd966
DW
1140 if (!enough(content->array.level, content->array.raid_disks,
1141 content->array.layout, 1, avail, okcnt))
583315d9
NB
1142 fprintf(stderr, Name ": Not enough devices to "
1143 "start the array.\n");
98dbd966
DW
1144 else if (!enough(content->array.level,
1145 content->array.raid_disks,
1146 content->array.layout, clean,
583315d9
NB
1147 avail, okcnt))
1148 fprintf(stderr, Name ": Not enough devices to "
1149 "start the array while not clean "
1150 "- consider --force.\n");
1151
7f91af49 1152 if (auto_assem)
1c203a4b 1153 ioctl(mdfd, STOP_ARRAY, NULL);
7f91af49 1154 close(mdfd);
64c4757e
NB
1155 return 1;
1156 }
82b27616 1157 if (runstop == -1) {
b8a8ccf9 1158 fprintf(stderr, Name ": %s assembled from %d drive%s",
52826846 1159 mddev, okcnt, okcnt==1?"":"s");
98dbd966
DW
1160 if (okcnt != content->array.raid_disks)
1161 fprintf(stderr, " (out of %d)", content->array.raid_disks);
b8a8ccf9 1162 fprintf(stderr, ", but not started.\n");
7f91af49 1163 close(mdfd);
64c4757e 1164 return 0;
82b27616 1165 }
4855f95c 1166 if (verbose >= -1) {
dab6685f
NB
1167 fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
1168 if (sparecnt)
1169 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
98dbd966
DW
1170 if (!enough(content->array.level, content->array.raid_disks,
1171 content->array.layout, 1, avail, okcnt))
dab6685f 1172 fprintf(stderr, " - not enough to start the array.\n");
98dbd966
DW
1173 else if (!enough(content->array.level,
1174 content->array.raid_disks,
1175 content->array.layout, clean,
583315d9
NB
1176 avail, okcnt))
1177 fprintf(stderr, " - not enough to start the "
1178 "array while not clean - consider "
1179 "--force.\n");
dab6685f 1180 else {
98dbd966 1181 if (req_cnt == content->array.raid_disks)
dab6685f
NB
1182 fprintf(stderr, " - need all %d to start it", req_cnt);
1183 else
98dbd966 1184 fprintf(stderr, " - need %d of %d to start", req_cnt, content->array.raid_disks);
dab6685f
NB
1185 fprintf(stderr, " (use --run to insist).\n");
1186 }
aa88f531 1187 }
7f91af49 1188 if (auto_assem)
1c203a4b 1189 ioctl(mdfd, STOP_ARRAY, NULL);
56a8da69 1190 close(mdfd);
64c4757e 1191 return 1;
82b27616 1192 } else {
52826846
NB
1193 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1194 * been updated to point to the current locations of devices.
1195 * so we can just start the array
82b27616 1196 */
cd29a5c8 1197 unsigned long dev;
213ee40b
NB
1198 dev = makedev(devices[chosen_drive].i.disk.major,
1199 devices[chosen_drive].i.disk.minor);
82b27616
NB
1200 if (ioctl(mdfd, START_ARRAY, dev)) {
1201 fprintf(stderr, Name ": Cannot start array: %s\n",
1202 strerror(errno));
1203 }
aba69144 1204
64c4757e 1205 }
7f91af49 1206 close(mdfd);
e0d19036 1207 return 0;
64c4757e 1208}
6234c63c
DW
1209
1210#ifndef MDASSEMBLE
1211int assemble_container_content(struct supertype *st, int mdfd,
1212 struct mdinfo *content, int runstop,
1213 char *chosen_name, int verbose)
1214{
1215 struct mdinfo *dev, *sra;
1216 int working = 0, preexist = 0;
1217 struct map_ent *map = NULL;
1218
1219 sysfs_init(content, mdfd, 0);
1220
1221 sra = sysfs_read(mdfd, 0, GET_VERSION);
1222 if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0)
4408ee76
N
1223 if (sysfs_set_array(content, md_get_version(mdfd)) != 0) {
1224 close(mdfd);
6234c63c 1225 return 1;
4408ee76 1226 }
6234c63c
DW
1227 if (sra)
1228 sysfs_free(sra);
1229
1230 for (dev = content->devs; dev; dev = dev->next)
1231 if (sysfs_add_disk(content, dev) == 0)
1232 working++;
1233 else if (errno == EEXIST)
1234 preexist++;
4408ee76
N
1235 if (working == 0) {
1236 close(mdfd);
7cb2aa33 1237 return 1;/* Nothing new, don't try to start */
4408ee76 1238 } else if (runstop > 0 ||
6234c63c 1239 (working + preexist) >= content->array.working_disks) {
bb50e5d3 1240 int err;
a714580e
N
1241
1242 map_update(&map, fd2devnum(mdfd),
1243 content->text_version,
1244 content->uuid, chosen_name);
6234c63c
DW
1245 switch(content->array.level) {
1246 case LEVEL_LINEAR:
1247 case LEVEL_MULTIPATH:
1248 case 0:
bb50e5d3
N
1249 err = sysfs_set_str(content, NULL, "array_state",
1250 "active");
6234c63c
DW
1251 break;
1252 default:
bb50e5d3 1253 err = sysfs_set_str(content, NULL, "array_state",
6234c63c
DW
1254 "readonly");
1255 /* start mdmon if needed. */
bb50e5d3
N
1256 if (!err) {
1257 if (!mdmon_running(st->container_dev))
1258 start_mdmon(st->container_dev);
1259 ping_monitor(devnum2devname(st->container_dev));
1260 }
6234c63c
DW
1261 break;
1262 }
bb50e5d3
N
1263 if (!err)
1264 sysfs_set_safemode(content, content->safe_mode_delay);
6234c63c 1265 if (verbose >= 0) {
bb50e5d3
N
1266 if (err)
1267 fprintf(stderr, Name
1268 ": array %s now has %d devices",
1269 chosen_name, working + preexist);
1270 else
1271 fprintf(stderr, Name
1272 ": Started %s with %d devices",
1273 chosen_name, working + preexist);
6234c63c
DW
1274 if (preexist)
1275 fprintf(stderr, " (%d new)", working);
1276 fprintf(stderr, "\n");
1277 }
bb50e5d3 1278 if (!err)
a7c6e3fb 1279 wait_for(chosen_name, mdfd);
4408ee76 1280 close(mdfd);
7cb2aa33 1281 return 0;
6234c63c 1282 /* FIXME should have an O_EXCL and wait for read-auto */
7cb2aa33 1283 } else {
6234c63c
DW
1284 if (verbose >= 0)
1285 fprintf(stderr, Name
1286 ": %s assembled with %d devices but "
1287 "not started\n",
1288 chosen_name, working);
4408ee76 1289 close(mdfd);
7cb2aa33
N
1290 return 1;
1291 }
6234c63c
DW
1292}
1293#endif
1294