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sysfs: Make sysfs_init() return an error code
[thirdparty/mdadm.git] / mdadm.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2013 Neil Brown <neilb@suse.de>
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@suse.de>
23 *
24 * Additions for bitmap and write-behind RAID options, Copyright (C) 2003-2004,
25 * Paul Clements, SteelEye Technology, Inc.
26 */
27
28 #include "mdadm.h"
29 #include "md_p.h"
30 #include <ctype.h>
31
32 static int scan_assemble(struct supertype *ss,
33 struct context *c,
34 struct mddev_ident *ident);
35 static int misc_scan(char devmode, struct context *c);
36 static int stop_scan(int verbose);
37 static int misc_list(struct mddev_dev *devlist,
38 struct mddev_ident *ident,
39 char *dump_directory,
40 struct supertype *ss, struct context *c);
41 const char Name[] = "mdadm";
42
43 int main(int argc, char *argv[])
44 {
45 int mode = 0;
46 int opt;
47 int option_index;
48 int rv;
49 int i;
50
51 unsigned long long array_size = 0;
52 unsigned long long data_offset = INVALID_SECTORS;
53 struct mddev_ident ident;
54 char *configfile = NULL;
55 int devmode = 0;
56 int bitmap_fd = -1;
57 struct mddev_dev *devlist = NULL;
58 struct mddev_dev **devlistend = & devlist;
59 struct mddev_dev *dv;
60 int devs_found = 0;
61 char *symlinks = NULL;
62 int grow_continue = 0;
63 /* autof indicates whether and how to create device node.
64 * bottom 3 bits are style. Rest (when shifted) are number of parts
65 * 0 - unset
66 * 1 - don't create (no)
67 * 2 - if is_standard, then create (yes)
68 * 3 - create as 'md' - reject is_standard mdp (md)
69 * 4 - create as 'mdp' - reject is_standard md (mdp)
70 * 5 - default to md if not is_standard (md in config file)
71 * 6 - default to mdp if not is_standard (part, or mdp in config file)
72 */
73 struct context c = {
74 .require_homehost = 1,
75 };
76 struct shape s = {
77 .journaldisks = 0,
78 .level = UnSet,
79 .layout = UnSet,
80 .bitmap_chunk = UnSet,
81 .consistency_policy = UnSet,
82 };
83
84 char sys_hostname[256];
85 char *mailaddr = NULL;
86 char *program = NULL;
87 int increments = 20;
88 int daemonise = 0;
89 char *pidfile = NULL;
90 int oneshot = 0;
91 int spare_sharing = 1;
92 struct supertype *ss = NULL;
93 enum flag_mode writemostly = FlagDefault;
94 enum flag_mode failfast = FlagDefault;
95 char *shortopt = short_options;
96 int dosyslog = 0;
97 int rebuild_map = 0;
98 char *remove_path = NULL;
99 char *udev_filename = NULL;
100 char *dump_directory = NULL;
101
102 int print_help = 0;
103 FILE *outf;
104
105 int mdfd = -1;
106
107 srandom(time(0) ^ getpid());
108
109 ident.uuid_set = 0;
110 ident.level = UnSet;
111 ident.raid_disks = UnSet;
112 ident.super_minor = UnSet;
113 ident.devices = 0;
114 ident.spare_group = NULL;
115 ident.autof = 0;
116 ident.st = NULL;
117 ident.bitmap_fd = -1;
118 ident.bitmap_file = NULL;
119 ident.name[0] = 0;
120 ident.container = NULL;
121 ident.member = NULL;
122
123 while ((option_index = -1),
124 (opt = getopt_long(argc, argv, shortopt, long_options,
125 &option_index)) != -1) {
126 int newmode = mode;
127 /* firstly, some mode-independent options */
128 switch(opt) {
129 case HelpOptions:
130 print_help = 2;
131 continue;
132 case 'h':
133 print_help = 1;
134 continue;
135
136 case 'V':
137 fputs(Version, stderr);
138 exit(0);
139
140 case 'v': c.verbose++;
141 continue;
142
143 case 'q': c.verbose--;
144 continue;
145
146 case 'b':
147 if (mode == ASSEMBLE || mode == BUILD ||
148 mode == CREATE || mode == GROW ||
149 mode == INCREMENTAL || mode == MANAGE)
150 break; /* b means bitmap */
151 case Brief:
152 c.brief = 1;
153 continue;
154
155 case 'Y': c.export++;
156 continue;
157
158 case HomeHost:
159 if (strcasecmp(optarg, "<ignore>") == 0)
160 c.require_homehost = 0;
161 else
162 c.homehost = optarg;
163 continue;
164
165 case OffRootOpt:
166 /* Silently ignore old option */
167 continue;
168
169 case Prefer:
170 if (c.prefer)
171 free(c.prefer);
172 if (asprintf(&c.prefer, "/%s/", optarg) <= 0)
173 c.prefer = NULL;
174 continue;
175
176 case ':':
177 case '?':
178 fputs(Usage, stderr);
179 exit(2);
180 }
181 /* second, figure out the mode.
182 * Some options force the mode. Others
183 * set the mode if it isn't already
184 */
185
186 switch(opt) {
187 case ManageOpt:
188 newmode = MANAGE;
189 shortopt = short_bitmap_options;
190 break;
191 case 'a':
192 case Add:
193 case AddSpare:
194 case AddJournal:
195 case 'r':
196 case Remove:
197 case Replace:
198 case With:
199 case 'f':
200 case Fail:
201 case ReAdd: /* re-add */
202 case ClusterConfirm:
203 if (!mode) {
204 newmode = MANAGE;
205 shortopt = short_bitmap_options;
206 }
207 break;
208
209 case 'A': newmode = ASSEMBLE;
210 shortopt = short_bitmap_auto_options;
211 break;
212 case 'B': newmode = BUILD;
213 shortopt = short_bitmap_auto_options;
214 break;
215 case 'C': newmode = CREATE;
216 shortopt = short_bitmap_auto_options;
217 break;
218 case 'F': newmode = MONITOR;
219 break;
220 case 'G': newmode = GROW;
221 shortopt = short_bitmap_options;
222 break;
223 case 'I': newmode = INCREMENTAL;
224 shortopt = short_bitmap_auto_options;
225 break;
226 case AutoDetect:
227 newmode = AUTODETECT;
228 break;
229
230 case MiscOpt:
231 case 'D':
232 case 'E':
233 case 'X':
234 case 'Q':
235 case ExamineBB:
236 case Dump:
237 case Restore:
238 case Action:
239 newmode = MISC;
240 break;
241
242 case 'R':
243 case 'S':
244 case 'o':
245 case 'w':
246 case 'W':
247 case WaitOpt:
248 case Waitclean:
249 case DetailPlatform:
250 case KillSubarray:
251 case UpdateSubarray:
252 case UdevRules:
253 case KillOpt:
254 if (!mode)
255 newmode = MISC;
256 break;
257
258 case NoSharing:
259 newmode = MONITOR;
260 break;
261 }
262 if (mode && newmode == mode) {
263 /* everybody happy ! */
264 } else if (mode && newmode != mode) {
265 /* not allowed.. */
266 pr_err("");
267 if (option_index >= 0)
268 fprintf(stderr, "--%s", long_options[option_index].name);
269 else
270 fprintf(stderr, "-%c", opt);
271 fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
272 map_num(modes, newmode),
273 map_num(modes, mode));
274 exit(2);
275 } else if (!mode && newmode) {
276 mode = newmode;
277 if (mode == MISC && devs_found) {
278 pr_err("No action given for %s in --misc mode\n",
279 devlist->devname);
280 cont_err("Action options must come before device names\n");
281 exit(2);
282 }
283 } else {
284 /* special case of -c --help */
285 if ((opt == 'c' || opt == ConfigFile) &&
286 (strncmp(optarg, "--h", 3) == 0 ||
287 strncmp(optarg, "-h", 2) == 0)) {
288 fputs(Help_config, stdout);
289 exit(0);
290 }
291
292 /* If first option is a device, don't force the mode yet */
293 if (opt == 1) {
294 if (devs_found == 0) {
295 dv = xmalloc(sizeof(*dv));
296 dv->devname = optarg;
297 dv->disposition = devmode;
298 dv->writemostly = writemostly;
299 dv->failfast = failfast;
300 dv->used = 0;
301 dv->next = NULL;
302 *devlistend = dv;
303 devlistend = &dv->next;
304
305 devs_found++;
306 continue;
307 }
308 /* No mode yet, and this is the second device ... */
309 pr_err("An option must be given to set the mode before a second device\n"
310 " (%s) is listed\n", optarg);
311 exit(2);
312 }
313 if (option_index >= 0)
314 pr_err("--%s", long_options[option_index].name);
315 else
316 pr_err("-%c", opt);
317 fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
318 exit(2);
319 }
320
321 /* if we just set the mode, then done */
322 switch(opt) {
323 case ManageOpt:
324 case MiscOpt:
325 case 'A':
326 case 'B':
327 case 'C':
328 case 'F':
329 case 'G':
330 case 'I':
331 case AutoDetect:
332 continue;
333 }
334 if (opt == 1) {
335 /* an undecorated option - must be a device name.
336 */
337
338 if (devs_found > 0 && devmode == DetailPlatform) {
339 pr_err("controller may only be specified once. %s ignored\n",
340 optarg);
341 continue;
342 }
343
344 if (devs_found > 0 && mode == MANAGE && !devmode) {
345 pr_err("Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
346 exit(2);
347 }
348 if (devs_found > 0 && mode == GROW && !devmode) {
349 pr_err("Must give -a/--add for devices to add: %s\n", optarg);
350 exit(2);
351 }
352 dv = xmalloc(sizeof(*dv));
353 dv->devname = optarg;
354 dv->disposition = devmode;
355 dv->writemostly = writemostly;
356 dv->failfast = failfast;
357 dv->used = 0;
358 dv->next = NULL;
359 *devlistend = dv;
360 devlistend = &dv->next;
361
362 devs_found++;
363 continue;
364 }
365
366 /* We've got a mode, and opt is now something else which
367 * could depend on the mode */
368 #define O(a,b) ((a<<16)|b)
369 switch (O(mode,opt)) {
370 case O(GROW,'c'):
371 case O(GROW,ChunkSize):
372 case O(CREATE,'c'):
373 case O(CREATE,ChunkSize):
374 case O(BUILD,'c'): /* chunk or rounding */
375 case O(BUILD,ChunkSize): /* chunk or rounding */
376 if (s.chunk) {
377 pr_err("chunk/rounding may only be specified once. Second value is %s.\n", optarg);
378 exit(2);
379 }
380 s.chunk = parse_size(optarg);
381 if (s.chunk == INVALID_SECTORS ||
382 s.chunk < 8 || (s.chunk&1)) {
383 pr_err("invalid chunk/rounding value: %s\n",
384 optarg);
385 exit(2);
386 }
387 /* Convert sectors to K */
388 s.chunk /= 2;
389 continue;
390
391 case O(INCREMENTAL, 'e'):
392 case O(CREATE,'e'):
393 case O(ASSEMBLE,'e'):
394 case O(MISC,'e'): /* set metadata (superblock) information */
395 if (ss) {
396 pr_err("metadata information already given\n");
397 exit(2);
398 }
399 for(i = 0; !ss && superlist[i]; i++)
400 ss = superlist[i]->match_metadata_desc(optarg);
401
402 if (!ss) {
403 pr_err("unrecognised metadata identifier: %s\n", optarg);
404 exit(2);
405 }
406 continue;
407
408 case O(MANAGE,'W'):
409 case O(MANAGE,WriteMostly):
410 case O(BUILD,'W'):
411 case O(BUILD,WriteMostly):
412 case O(CREATE,'W'):
413 case O(CREATE,WriteMostly):
414 /* set write-mostly for following devices */
415 writemostly = FlagSet;
416 continue;
417
418 case O(MANAGE,'w'):
419 /* clear write-mostly for following devices */
420 writemostly = FlagClear;
421 continue;
422
423 case O(MANAGE,FailFast):
424 case O(CREATE,FailFast):
425 failfast = FlagSet;
426 continue;
427 case O(MANAGE,NoFailFast):
428 failfast = FlagClear;
429 continue;
430
431 case O(GROW,'z'):
432 case O(CREATE,'z'):
433 case O(BUILD,'z'): /* size */
434 if (s.size > 0) {
435 pr_err("size may only be specified once. Second value is %s.\n", optarg);
436 exit(2);
437 }
438 if (strcmp(optarg, "max") == 0)
439 s.size = MAX_SIZE;
440 else {
441 s.size = parse_size(optarg);
442 if (s.size == INVALID_SECTORS || s.size < 8) {
443 pr_err("invalid size: %s\n", optarg);
444 exit(2);
445 }
446 /* convert sectors to K */
447 s.size /= 2;
448 }
449 continue;
450
451 case O(GROW,'Z'): /* array size */
452 if (array_size > 0) {
453 pr_err("array-size may only be specified once. Second value is %s.\n", optarg);
454 exit(2);
455 }
456 if (strcmp(optarg, "max") == 0)
457 array_size = MAX_SIZE;
458 else {
459 array_size = parse_size(optarg);
460 if (array_size == 0 ||
461 array_size == INVALID_SECTORS) {
462 pr_err("invalid array size: %s\n",
463 optarg);
464 exit(2);
465 }
466 }
467 continue;
468
469 case O(CREATE,DataOffset):
470 case O(GROW,DataOffset):
471 if (data_offset != INVALID_SECTORS) {
472 pr_err("data-offset may only be specified one. Second value is %s.\n", optarg);
473 exit(2);
474 }
475 if (mode == CREATE && strcmp(optarg, "variable") == 0)
476 data_offset = VARIABLE_OFFSET;
477 else
478 data_offset = parse_size(optarg);
479 if (data_offset == INVALID_SECTORS) {
480 pr_err("invalid data-offset: %s\n",
481 optarg);
482 exit(2);
483 }
484 continue;
485
486 case O(GROW,'l'):
487 case O(CREATE,'l'):
488 case O(BUILD,'l'): /* set raid level*/
489 if (s.level != UnSet) {
490 pr_err("raid level may only be set once. Second value is %s.\n", optarg);
491 exit(2);
492 }
493 s.level = map_name(pers, optarg);
494 if (s.level == UnSet) {
495 pr_err("invalid raid level: %s\n",
496 optarg);
497 exit(2);
498 }
499 if (s.level != 0 && s.level != LEVEL_LINEAR &&
500 s.level != 1 && s.level != LEVEL_MULTIPATH &&
501 s.level != LEVEL_FAULTY && s.level != 10 &&
502 mode == BUILD) {
503 pr_err("Raid level %s not permitted with --build.\n",
504 optarg);
505 exit(2);
506 }
507 if (s.sparedisks > 0 && s.level < 1 && s.level >= -1) {
508 pr_err("raid level %s is incompatible with spare-devices setting.\n",
509 optarg);
510 exit(2);
511 }
512 ident.level = s.level;
513 continue;
514
515 case O(GROW, 'p'): /* new layout */
516 case O(GROW, Layout):
517 if (s.layout_str) {
518 pr_err("layout may only be sent once. Second value was %s\n", optarg);
519 exit(2);
520 }
521 s.layout_str = optarg;
522 /* 'Grow' will parse the value */
523 continue;
524
525 case O(CREATE,'p'): /* raid5 layout */
526 case O(CREATE,Layout):
527 case O(BUILD,'p'): /* faulty layout */
528 case O(BUILD,Layout):
529 if (s.layout != UnSet) {
530 pr_err("layout may only be sent once. Second value was %s\n", optarg);
531 exit(2);
532 }
533 switch(s.level) {
534 default:
535 pr_err("layout not meaningful for %s arrays.\n",
536 map_num(pers, s.level));
537 exit(2);
538 case UnSet:
539 pr_err("raid level must be given before layout.\n");
540 exit(2);
541
542 case 5:
543 s.layout = map_name(r5layout, optarg);
544 if (s.layout == UnSet) {
545 pr_err("layout %s not understood for raid5.\n",
546 optarg);
547 exit(2);
548 }
549 break;
550 case 6:
551 s.layout = map_name(r6layout, optarg);
552 if (s.layout == UnSet) {
553 pr_err("layout %s not understood for raid6.\n",
554 optarg);
555 exit(2);
556 }
557 break;
558
559 case 10:
560 s.layout = parse_layout_10(optarg);
561 if (s.layout < 0) {
562 pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
563 exit(2);
564 }
565 break;
566 case LEVEL_FAULTY:
567 /* Faulty
568 * modeNNN
569 */
570 s.layout = parse_layout_faulty(optarg);
571 if (s.layout == -1) {
572 pr_err("layout %s not understood for faulty.\n",
573 optarg);
574 exit(2);
575 }
576 break;
577 }
578 continue;
579
580 case O(CREATE,AssumeClean):
581 case O(BUILD,AssumeClean): /* assume clean */
582 case O(GROW,AssumeClean):
583 s.assume_clean = 1;
584 continue;
585
586 case O(GROW,'n'):
587 case O(CREATE,'n'):
588 case O(BUILD,'n'): /* number of raid disks */
589 if (s.raiddisks) {
590 pr_err("raid-devices set twice: %d and %s\n",
591 s.raiddisks, optarg);
592 exit(2);
593 }
594 s.raiddisks = parse_num(optarg);
595 if (s.raiddisks <= 0) {
596 pr_err("invalid number of raid devices: %s\n",
597 optarg);
598 exit(2);
599 }
600 ident.raid_disks = s.raiddisks;
601 continue;
602 case O(ASSEMBLE, Nodes):
603 case O(GROW, Nodes):
604 case O(CREATE, Nodes):
605 c.nodes = parse_num(optarg);
606 if (c.nodes < 2) {
607 pr_err("clustered array needs two nodes at least: %s\n",
608 optarg);
609 exit(2);
610 }
611 continue;
612 case O(CREATE, ClusterName):
613 case O(ASSEMBLE, ClusterName):
614 c.homecluster = optarg;
615 if (strlen(c.homecluster) > 64) {
616 pr_err("Cluster name too big.\n");
617 exit(ERANGE);
618 }
619 continue;
620 case O(CREATE,'x'): /* number of spare (eXtra) disks */
621 if (s.sparedisks) {
622 pr_err("spare-devices set twice: %d and %s\n",
623 s.sparedisks, optarg);
624 exit(2);
625 }
626 if (s.level != UnSet && s.level <= 0 && s.level >= -1) {
627 pr_err("spare-devices setting is incompatible with raid level %d\n",
628 s.level);
629 exit(2);
630 }
631 s.sparedisks = parse_num(optarg);
632 if (s.sparedisks < 0) {
633 pr_err("invalid number of spare-devices: %s\n",
634 optarg);
635 exit(2);
636 }
637 continue;
638
639 case O(CREATE,'a'):
640 case O(CREATE,Auto):
641 case O(BUILD,'a'):
642 case O(BUILD,Auto):
643 case O(INCREMENTAL,'a'):
644 case O(INCREMENTAL,Auto):
645 case O(ASSEMBLE,'a'):
646 case O(ASSEMBLE,Auto): /* auto-creation of device node */
647 c.autof = parse_auto(optarg, "--auto flag", 0);
648 continue;
649
650 case O(CREATE,Symlinks):
651 case O(BUILD,Symlinks):
652 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
653 symlinks = optarg;
654 continue;
655
656 case O(BUILD,'f'): /* force honouring '-n 1' */
657 case O(BUILD,Force): /* force honouring '-n 1' */
658 case O(GROW,'f'): /* ditto */
659 case O(GROW,Force): /* ditto */
660 case O(CREATE,'f'): /* force honouring of device list */
661 case O(CREATE,Force): /* force honouring of device list */
662 case O(ASSEMBLE,'f'): /* force assembly */
663 case O(ASSEMBLE,Force): /* force assembly */
664 case O(MISC,'f'): /* force zero */
665 case O(MISC,Force): /* force zero */
666 case O(MANAGE,Force): /* add device which is too large */
667 c.force = 1;
668 continue;
669 /* now for the Assemble options */
670 case O(ASSEMBLE, FreezeReshape): /* Freeze reshape during
671 * initrd phase */
672 case O(INCREMENTAL, FreezeReshape):
673 c.freeze_reshape = 1;
674 continue;
675 case O(CREATE,'u'): /* uuid of array */
676 case O(ASSEMBLE,'u'): /* uuid of array */
677 if (ident.uuid_set) {
678 pr_err("uuid cannot be set twice. Second value %s.\n", optarg);
679 exit(2);
680 }
681 if (parse_uuid(optarg, ident.uuid))
682 ident.uuid_set = 1;
683 else {
684 pr_err("Bad uuid: %s\n", optarg);
685 exit(2);
686 }
687 continue;
688
689 case O(CREATE,'N'):
690 case O(ASSEMBLE,'N'):
691 case O(MISC,'N'):
692 if (ident.name[0]) {
693 pr_err("name cannot be set twice. Second value %s.\n", optarg);
694 exit(2);
695 }
696 if (mode == MISC && !c.subarray) {
697 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
698 exit(2);
699 }
700 if (strlen(optarg) > 32) {
701 pr_err("name '%s' is too long, 32 chars max.\n",
702 optarg);
703 exit(2);
704 }
705 strcpy(ident.name, optarg);
706 continue;
707
708 case O(ASSEMBLE,'m'): /* super-minor for array */
709 case O(ASSEMBLE,SuperMinor):
710 if (ident.super_minor != UnSet) {
711 pr_err("super-minor cannot be set twice. Second value: %s.\n", optarg);
712 exit(2);
713 }
714 if (strcmp(optarg, "dev") == 0)
715 ident.super_minor = -2;
716 else {
717 ident.super_minor = parse_num(optarg);
718 if (ident.super_minor < 0) {
719 pr_err("Bad super-minor number: %s.\n", optarg);
720 exit(2);
721 }
722 }
723 continue;
724
725 case O(ASSEMBLE,'o'):
726 case O(MANAGE,'o'):
727 case O(CREATE,'o'):
728 c.readonly = 1;
729 continue;
730
731 case O(ASSEMBLE,'U'): /* update the superblock */
732 case O(MISC,'U'):
733 if (c.update) {
734 pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
735 c.update, optarg);
736 exit(2);
737 }
738 if (mode == MISC && !c.subarray) {
739 pr_err("Only subarrays can be updated in misc mode\n");
740 exit(2);
741 }
742 c.update = optarg;
743 if (strcmp(c.update, "sparc2.2") == 0)
744 continue;
745 if (strcmp(c.update, "super-minor") == 0)
746 continue;
747 if (strcmp(c.update, "summaries") == 0)
748 continue;
749 if (strcmp(c.update, "resync") == 0)
750 continue;
751 if (strcmp(c.update, "uuid") == 0)
752 continue;
753 if (strcmp(c.update, "name") == 0)
754 continue;
755 if (strcmp(c.update, "homehost") == 0)
756 continue;
757 if (strcmp(c.update, "home-cluster") == 0)
758 continue;
759 if (strcmp(c.update, "nodes") == 0)
760 continue;
761 if (strcmp(c.update, "devicesize") == 0)
762 continue;
763 if (strcmp(c.update, "no-bitmap") == 0)
764 continue;
765 if (strcmp(c.update, "bbl") == 0)
766 continue;
767 if (strcmp(c.update, "no-bbl") == 0)
768 continue;
769 if (strcmp(c.update, "force-no-bbl") == 0)
770 continue;
771 if (strcmp(c.update, "ppl") == 0)
772 continue;
773 if (strcmp(c.update, "no-ppl") == 0)
774 continue;
775 if (strcmp(c.update, "metadata") == 0)
776 continue;
777 if (strcmp(c.update, "revert-reshape") == 0)
778 continue;
779 if (strcmp(c.update, "byteorder") == 0) {
780 if (ss) {
781 pr_err("must not set metadata type with --update=byteorder.\n");
782 exit(2);
783 }
784 for(i = 0; !ss && superlist[i]; i++)
785 ss = superlist[i]->match_metadata_desc(
786 "0.swap");
787 if (!ss) {
788 pr_err("INTERNAL ERROR cannot find 0.swap\n");
789 exit(2);
790 }
791
792 continue;
793 }
794 if (strcmp(c.update,"?") == 0 ||
795 strcmp(c.update, "help") == 0) {
796 outf = stdout;
797 fprintf(outf, "%s: ", Name);
798 } else {
799 outf = stderr;
800 fprintf(outf,
801 "%s: '--update=%s' is invalid. ",
802 Name, c.update);
803 }
804 fprintf(outf, "Valid --update options are:\n"
805 " 'sparc2.2', 'super-minor', 'uuid', 'name', 'nodes', 'resync',\n"
806 " 'summaries', 'homehost', 'home-cluster', 'byteorder', 'devicesize',\n"
807 " 'no-bitmap', 'metadata', 'revert-reshape'\n"
808 " 'bbl', 'no-bbl', 'force-no-bbl', 'ppl', 'no-ppl'\n"
809 );
810 exit(outf == stdout ? 0 : 2);
811
812 case O(MANAGE,'U'):
813 /* update=devicesize is allowed with --re-add */
814 if (devmode != 'A') {
815 pr_err("--update in Manage mode only allowed with --re-add.\n");
816 exit(1);
817 }
818 if (c.update) {
819 pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
820 c.update, optarg);
821 exit(2);
822 }
823 c.update = optarg;
824 if (strcmp(c.update, "devicesize") != 0 &&
825 strcmp(c.update, "bbl") != 0 &&
826 strcmp(c.update, "force-no-bbl") != 0 &&
827 strcmp(c.update, "no-bbl") != 0) {
828 pr_err("only 'devicesize', 'bbl', 'no-bbl', and 'force-no-bbl' can be updated with --re-add\n");
829 exit(2);
830 }
831 continue;
832
833 case O(INCREMENTAL,NoDegraded):
834 pr_err("--no-degraded is deprecated in Incremental mode\n");
835 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
836 c.runstop = -1; /* --stop isn't allowed for --assemble,
837 * so we overload slightly */
838 continue;
839
840 case O(ASSEMBLE,'c'):
841 case O(ASSEMBLE,ConfigFile):
842 case O(INCREMENTAL, 'c'):
843 case O(INCREMENTAL, ConfigFile):
844 case O(MISC, 'c'):
845 case O(MISC, ConfigFile):
846 case O(MONITOR,'c'):
847 case O(MONITOR,ConfigFile):
848 case O(CREATE,ConfigFile):
849 if (configfile) {
850 pr_err("configfile cannot be set twice. Second value is %s.\n", optarg);
851 exit(2);
852 }
853 configfile = optarg;
854 set_conffile(configfile);
855 /* FIXME possibly check that config file exists. Even parse it */
856 continue;
857 case O(ASSEMBLE,'s'): /* scan */
858 case O(MISC,'s'):
859 case O(MONITOR,'s'):
860 case O(INCREMENTAL,'s'):
861 c.scan = 1;
862 continue;
863
864 case O(MONITOR,'m'): /* mail address */
865 case O(MONITOR,EMail):
866 if (mailaddr)
867 pr_err("only specify one mailaddress. %s ignored.\n",
868 optarg);
869 else
870 mailaddr = optarg;
871 continue;
872
873 case O(MONITOR,'p'): /* alert program */
874 case O(MONITOR,ProgramOpt): /* alert program */
875 if (program)
876 pr_err("only specify one alter program. %s ignored.\n",
877 optarg);
878 else
879 program = optarg;
880 continue;
881
882 case O(MONITOR,'r'): /* rebuild increments */
883 case O(MONITOR,Increment):
884 increments = atoi(optarg);
885 if (increments > 99 || increments < 1) {
886 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
887 exit(2);
888 }
889 continue;
890
891 case O(MONITOR,'d'): /* delay in seconds */
892 case O(GROW, 'd'):
893 case O(BUILD,'d'): /* delay for bitmap updates */
894 case O(CREATE,'d'):
895 if (c.delay)
896 pr_err("only specify delay once. %s ignored.\n",
897 optarg);
898 else {
899 c.delay = parse_num(optarg);
900 if (c.delay < 1) {
901 pr_err("invalid delay: %s\n",
902 optarg);
903 exit(2);
904 }
905 }
906 continue;
907 case O(MONITOR,'f'): /* daemonise */
908 case O(MONITOR,Fork):
909 daemonise = 1;
910 continue;
911 case O(MONITOR,'i'): /* pid */
912 if (pidfile)
913 pr_err("only specify one pid file. %s ignored.\n",
914 optarg);
915 else
916 pidfile = optarg;
917 continue;
918 case O(MONITOR,'1'): /* oneshot */
919 oneshot = 1;
920 spare_sharing = 0;
921 continue;
922 case O(MONITOR,'t'): /* test */
923 c.test = 1;
924 continue;
925 case O(MONITOR,'y'): /* log messages to syslog */
926 openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
927 dosyslog = 1;
928 continue;
929 case O(MONITOR, NoSharing):
930 spare_sharing = 0;
931 continue;
932
933 /* now the general management options. Some are applicable
934 * to other modes. None have arguments.
935 */
936 case O(GROW,'a'):
937 case O(GROW,Add):
938 case O(MANAGE,'a'):
939 case O(MANAGE,Add): /* add a drive */
940 devmode = 'a';
941 continue;
942 case O(MANAGE,AddSpare): /* add drive - never re-add */
943 devmode = 'S';
944 continue;
945 case O(MANAGE,AddJournal): /* add journal */
946 if (s.journaldisks && (s.level < 4 || s.level > 6)) {
947 pr_err("--add-journal is only supported for RAID level 4/5/6.\n");
948 exit(2);
949 }
950 devmode = 'j';
951 continue;
952 case O(MANAGE,ReAdd):
953 devmode = 'A';
954 continue;
955 case O(MANAGE,'r'): /* remove a drive */
956 case O(MANAGE,Remove):
957 devmode = 'r';
958 continue;
959 case O(MANAGE,'f'): /* set faulty */
960 case O(MANAGE,Fail):
961 case O(INCREMENTAL,'f'):
962 case O(INCREMENTAL,Remove):
963 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
964 * even though we will both fail and
965 * remove the device */
966 devmode = 'f';
967 continue;
968 case O(MANAGE, ClusterConfirm):
969 devmode = 'c';
970 continue;
971 case O(MANAGE,Replace):
972 /* Mark these devices for replacement */
973 devmode = 'R';
974 continue;
975 case O(MANAGE,With):
976 /* These are the replacements to use */
977 if (devmode != 'R') {
978 pr_err("--with must follow --replace\n");
979 exit(2);
980 }
981 devmode = 'W';
982 continue;
983 case O(INCREMENTAL,'R'):
984 case O(MANAGE,'R'):
985 case O(ASSEMBLE,'R'):
986 case O(BUILD,'R'):
987 case O(CREATE,'R'): /* Run the array */
988 if (c.runstop < 0) {
989 pr_err("Cannot both Stop and Run an array\n");
990 exit(2);
991 }
992 c.runstop = 1;
993 continue;
994 case O(MANAGE,'S'):
995 if (c.runstop > 0) {
996 pr_err("Cannot both Run and Stop an array\n");
997 exit(2);
998 }
999 c.runstop = -1;
1000 continue;
1001 case O(MANAGE,'t'):
1002 c.test = 1;
1003 continue;
1004
1005 case O(MISC,'Q'):
1006 case O(MISC,'D'):
1007 case O(MISC,'E'):
1008 case O(MISC,KillOpt):
1009 case O(MISC,'R'):
1010 case O(MISC,'S'):
1011 case O(MISC,'X'):
1012 case O(MISC, ExamineBB):
1013 case O(MISC,'o'):
1014 case O(MISC,'w'):
1015 case O(MISC,'W'):
1016 case O(MISC, WaitOpt):
1017 case O(MISC, Waitclean):
1018 case O(MISC, DetailPlatform):
1019 case O(MISC, KillSubarray):
1020 case O(MISC, UpdateSubarray):
1021 case O(MISC, Dump):
1022 case O(MISC, Restore):
1023 case O(MISC ,Action):
1024 if (opt == KillSubarray || opt == UpdateSubarray) {
1025 if (c.subarray) {
1026 pr_err("subarray can only be specified once\n");
1027 exit(2);
1028 }
1029 c.subarray = optarg;
1030 }
1031 if (opt == Action) {
1032 if (c.action) {
1033 pr_err("Only one --action can be specified\n");
1034 exit(2);
1035 }
1036 if (strcmp(optarg, "idle") == 0 ||
1037 strcmp(optarg, "frozen") == 0 ||
1038 strcmp(optarg, "check") == 0 ||
1039 strcmp(optarg, "repair") == 0)
1040 c.action = optarg;
1041 else {
1042 pr_err("action must be one of idle, frozen, check, repair\n");
1043 exit(2);
1044 }
1045 }
1046 if (devmode && devmode != opt &&
1047 (devmode == 'E' ||
1048 (opt == 'E' && devmode != 'Q'))) {
1049 pr_err("--examine/-E cannot be given with ");
1050 if (devmode == 'E') {
1051 if (option_index >= 0)
1052 fprintf(stderr, "--%s\n",
1053 long_options[option_index].name);
1054 else
1055 fprintf(stderr, "-%c\n", opt);
1056 } else if (isalpha(devmode))
1057 fprintf(stderr, "-%c\n", devmode);
1058 else
1059 fprintf(stderr, "previous option\n");
1060 exit(2);
1061 }
1062 devmode = opt;
1063 if (opt == Dump || opt == Restore) {
1064 if (dump_directory != NULL) {
1065 pr_err("dump/restore directory specified twice: %s and %s\n",
1066 dump_directory, optarg);
1067 exit(2);
1068 }
1069 dump_directory = optarg;
1070 }
1071 continue;
1072 case O(MISC, UdevRules):
1073 if (devmode && devmode != opt) {
1074 pr_err("--udev-rules must be the only option.\n");
1075 } else {
1076 if (udev_filename)
1077 pr_err("only specify one udev rule filename. %s ignored.\n",
1078 optarg);
1079 else
1080 udev_filename = optarg;
1081 }
1082 devmode = opt;
1083 continue;
1084 case O(MISC,'t'):
1085 c.test = 1;
1086 continue;
1087
1088 case O(MISC, Sparc22):
1089 if (devmode != 'E') {
1090 pr_err("--sparc2.2 only allowed with --examine\n");
1091 exit(2);
1092 }
1093 c.SparcAdjust = 1;
1094 continue;
1095
1096 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
1097 case O(ASSEMBLE,Bitmap):
1098 if (!optarg) {
1099 pr_err("bitmap file needed with -b in --assemble mode\n");
1100 exit(2);
1101 }
1102 if (strcmp(optarg, "internal") == 0 ||
1103 strcmp(optarg, "clustered") == 0) {
1104 pr_err("no need to specify --bitmap when assembling"
1105 " arrays with internal or clustered bitmap\n");
1106 continue;
1107 }
1108 bitmap_fd = open(optarg, O_RDWR);
1109 if (!*optarg || bitmap_fd < 0) {
1110 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1111 exit(2);
1112 }
1113 ident.bitmap_fd = bitmap_fd; /* for Assemble */
1114 continue;
1115
1116 case O(ASSEMBLE, BackupFile):
1117 case O(GROW, BackupFile):
1118 /* Specify a file into which grow might place a backup,
1119 * or from which assemble might recover a backup
1120 */
1121 if (c.backup_file) {
1122 pr_err("backup file already specified, rejecting %s\n", optarg);
1123 exit(2);
1124 }
1125 c.backup_file = optarg;
1126 continue;
1127
1128 case O(GROW, Continue):
1129 /* Continue interrupted grow
1130 */
1131 grow_continue = 1;
1132 continue;
1133 case O(ASSEMBLE, InvalidBackup):
1134 /* Acknowledge that the backupfile is invalid, but ask
1135 * to continue anyway
1136 */
1137 c.invalid_backup = 1;
1138 continue;
1139
1140 case O(BUILD,'b'):
1141 case O(BUILD,Bitmap):
1142 case O(CREATE,'b'):
1143 case O(CREATE,Bitmap): /* here we create the bitmap */
1144 case O(GROW,'b'):
1145 case O(GROW,Bitmap):
1146 if (s.bitmap_file) {
1147 pr_err("bitmap cannot be set twice. Second value: %s.\n", optarg);
1148 exit(2);
1149 }
1150 if (strcmp(optarg, "internal") == 0 ||
1151 strcmp(optarg, "none") == 0 ||
1152 strchr(optarg, '/') != NULL) {
1153 s.bitmap_file = optarg;
1154 continue;
1155 }
1156 if (strcmp(optarg, "clustered") == 0) {
1157 s.bitmap_file = optarg;
1158 /* Set the default number of cluster nodes
1159 * to 4 if not already set by user
1160 */
1161 if (c.nodes < 1)
1162 c.nodes = 4;
1163 continue;
1164 }
1165 /* probable typo */
1166 pr_err("bitmap file must contain a '/', or be 'internal', or be 'clustered', or 'none'\n"
1167 " not '%s'\n", optarg);
1168 exit(2);
1169
1170 case O(GROW,BitmapChunk):
1171 case O(BUILD,BitmapChunk):
1172 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1173 s.bitmap_chunk = parse_size(optarg);
1174 if (s.bitmap_chunk == 0 ||
1175 s.bitmap_chunk == INVALID_SECTORS ||
1176 s.bitmap_chunk & (s.bitmap_chunk - 1)) {
1177 pr_err("invalid bitmap chunksize: %s\n",
1178 optarg);
1179 exit(2);
1180 }
1181 s.bitmap_chunk = s.bitmap_chunk * 512;
1182 continue;
1183
1184 case O(GROW, WriteBehind):
1185 case O(BUILD, WriteBehind):
1186 case O(CREATE, WriteBehind): /* write-behind mode */
1187 s.write_behind = DEFAULT_MAX_WRITE_BEHIND;
1188 if (optarg) {
1189 s.write_behind = parse_num(optarg);
1190 if (s.write_behind < 0 ||
1191 s.write_behind > 16383) {
1192 pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1193 exit(2);
1194 }
1195 }
1196 continue;
1197
1198 case O(INCREMENTAL, 'r'):
1199 case O(INCREMENTAL, RebuildMapOpt):
1200 rebuild_map = 1;
1201 continue;
1202 case O(INCREMENTAL, IncrementalPath):
1203 remove_path = optarg;
1204 continue;
1205 case O(CREATE, WriteJournal):
1206 if (s.journaldisks) {
1207 pr_err("Please specify only one journal device for the array.\n");
1208 pr_err("Ignoring --write-journal %s...\n", optarg);
1209 continue;
1210 }
1211 dv = xmalloc(sizeof(*dv));
1212 dv->devname = optarg;
1213 dv->disposition = 'j'; /* WriteJournal */
1214 dv->used = 0;
1215 dv->next = NULL;
1216 *devlistend = dv;
1217 devlistend = &dv->next;
1218 devs_found++;
1219
1220 s.journaldisks = 1;
1221 continue;
1222 case O(CREATE, 'k'):
1223 case O(GROW, 'k'):
1224 s.consistency_policy = map_name(consistency_policies,
1225 optarg);
1226 if (s.consistency_policy == UnSet ||
1227 s.consistency_policy < CONSISTENCY_POLICY_RESYNC) {
1228 pr_err("Invalid consistency policy: %s\n",
1229 optarg);
1230 exit(2);
1231 }
1232 continue;
1233 }
1234 /* We have now processed all the valid options. Anything else is
1235 * an error
1236 */
1237 if (option_index > 0)
1238 pr_err(":option --%s not valid in %s mode\n",
1239 long_options[option_index].name,
1240 map_num(modes, mode));
1241 else
1242 pr_err("option -%c not valid in %s mode\n",
1243 opt, map_num(modes, mode));
1244 exit(2);
1245
1246 }
1247
1248 if (print_help) {
1249 char *help_text;
1250 if (print_help == 2)
1251 help_text = OptionHelp;
1252 else
1253 help_text = mode_help[mode];
1254 if (help_text == NULL)
1255 help_text = Help;
1256 fputs(help_text,stdout);
1257 exit(0);
1258 }
1259
1260 if (s.journaldisks) {
1261 if (s.level < 4 || s.level > 6) {
1262 pr_err("--write-journal is only supported for RAID level 4/5/6.\n");
1263 exit(2);
1264 }
1265 if (s.consistency_policy != UnSet &&
1266 s.consistency_policy != CONSISTENCY_POLICY_JOURNAL) {
1267 pr_err("--write-journal is not supported with consistency policy: %s\n",
1268 map_num(consistency_policies, s.consistency_policy));
1269 exit(2);
1270 }
1271 }
1272
1273 if (mode == CREATE && s.consistency_policy != UnSet) {
1274 if (s.level <= 0) {
1275 pr_err("--consistency-policy not meaningful with level %s.\n",
1276 map_num(pers, s.level));
1277 exit(2);
1278 } else if (s.consistency_policy == CONSISTENCY_POLICY_JOURNAL &&
1279 !s.journaldisks) {
1280 pr_err("--write-journal is required for consistency policy: %s\n",
1281 map_num(consistency_policies, s.consistency_policy));
1282 exit(2);
1283 } else if (s.consistency_policy == CONSISTENCY_POLICY_PPL &&
1284 s.level != 5) {
1285 pr_err("PPL consistency policy is only supported for RAID level 5.\n");
1286 exit(2);
1287 } else if (s.consistency_policy == CONSISTENCY_POLICY_BITMAP &&
1288 (!s.bitmap_file ||
1289 strcmp(s.bitmap_file, "none") == 0)) {
1290 pr_err("--bitmap is required for consistency policy: %s\n",
1291 map_num(consistency_policies, s.consistency_policy));
1292 exit(2);
1293 } else if (s.bitmap_file &&
1294 strcmp(s.bitmap_file, "none") != 0 &&
1295 s.consistency_policy != CONSISTENCY_POLICY_BITMAP &&
1296 s.consistency_policy != CONSISTENCY_POLICY_JOURNAL) {
1297 pr_err("--bitmap is not compatible with consistency policy: %s\n",
1298 map_num(consistency_policies, s.consistency_policy));
1299 exit(2);
1300 }
1301 }
1302
1303 if (!mode && devs_found) {
1304 mode = MISC;
1305 devmode = 'Q';
1306 if (devlist->disposition == 0)
1307 devlist->disposition = devmode;
1308 }
1309 if (!mode) {
1310 fputs(Usage, stderr);
1311 exit(2);
1312 }
1313
1314 if (symlinks) {
1315 struct createinfo *ci = conf_get_create_info();
1316
1317 if (strcasecmp(symlinks, "yes") == 0)
1318 ci->symlinks = 1;
1319 else if (strcasecmp(symlinks, "no") == 0)
1320 ci->symlinks = 0;
1321 else {
1322 pr_err("option --symlinks must be 'no' or 'yes'\n");
1323 exit(2);
1324 }
1325 }
1326 /* Ok, got the option parsing out of the way
1327 * hopefully it's mostly right but there might be some stuff
1328 * missing
1329 *
1330 * That is mostly checked in the per-mode stuff but...
1331 *
1332 * For @,B,C and A without -s, the first device listed must be
1333 * an md device. We check that here and open it.
1334 */
1335
1336 if (mode == MANAGE || mode == BUILD || mode == CREATE ||
1337 mode == GROW || (mode == ASSEMBLE && ! c.scan)) {
1338 if (devs_found < 1) {
1339 pr_err("an md device must be given in this mode\n");
1340 exit(2);
1341 }
1342 if ((int)ident.super_minor == -2 && c.autof) {
1343 pr_err("--super-minor=dev is incompatible with --auto\n");
1344 exit(2);
1345 }
1346 if (mode == MANAGE || mode == GROW) {
1347 mdfd = open_mddev(devlist->devname, 1);
1348 if (mdfd < 0)
1349 exit(1);
1350 } else
1351 /* non-existent device is OK */
1352 mdfd = open_mddev(devlist->devname, 0);
1353 if (mdfd == -2) {
1354 pr_err("device %s exists but is not an md array.\n", devlist->devname);
1355 exit(1);
1356 }
1357 if ((int)ident.super_minor == -2) {
1358 struct stat stb;
1359 if (mdfd < 0) {
1360 pr_err("--super-minor=dev given, and listed device %s doesn't exist.\n",
1361 devlist->devname);
1362 exit(1);
1363 }
1364 fstat(mdfd, &stb);
1365 ident.super_minor = minor(stb.st_rdev);
1366 }
1367 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1368 /* We don't really want this open yet, we just might
1369 * have wanted to check some things
1370 */
1371 close(mdfd);
1372 mdfd = -1;
1373 }
1374 }
1375
1376 if (s.raiddisks) {
1377 if (s.raiddisks == 1 && !c.force && s.level != LEVEL_FAULTY) {
1378 pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1379 " a mistake. If you really mean it you will need to specify --force before\n"
1380 " setting the number of drives.\n");
1381 exit(2);
1382 }
1383 }
1384
1385 if (c.homehost == NULL && c.require_homehost)
1386 c.homehost = conf_get_homehost(&c.require_homehost);
1387 if (c.homehost == NULL || strcasecmp(c.homehost, "<system>") == 0) {
1388 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1389 sys_hostname[sizeof(sys_hostname)-1] = 0;
1390 c.homehost = sys_hostname;
1391 }
1392 }
1393 if (c.homehost &&
1394 (!c.homehost[0] || strcasecmp(c.homehost, "<none>") == 0)) {
1395 c.homehost = NULL;
1396 c.require_homehost = 0;
1397 }
1398
1399 rv = 0;
1400
1401 set_hooks(); /* set hooks from libs */
1402
1403 if (c.homecluster == NULL && (c.nodes > 0)) {
1404 c.homecluster = conf_get_homecluster();
1405 if (c.homecluster == NULL)
1406 rv = get_cluster_name(&c.homecluster);
1407 if (rv) {
1408 pr_err("The md can't get cluster name\n");
1409 exit(1);
1410 }
1411 }
1412
1413 if (c.backup_file && data_offset != INVALID_SECTORS) {
1414 pr_err("--backup-file and --data-offset are incompatible\n");
1415 exit(2);
1416 }
1417
1418 if ((mode == MISC && devmode == 'E') ||
1419 (mode == MONITOR && spare_sharing == 0))
1420 /* Anyone may try this */;
1421 else if (geteuid() != 0) {
1422 pr_err("must be super-user to perform this action\n");
1423 exit(1);
1424 }
1425
1426 ident.autof = c.autof;
1427
1428 if (c.scan && c.verbose < 2)
1429 /* --scan implied --brief unless -vv */
1430 c.brief = 1;
1431
1432 switch(mode) {
1433 case MANAGE:
1434 /* readonly, add/remove, readwrite, runstop */
1435 if (c.readonly > 0)
1436 rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1437 if (!rv && devs_found>1)
1438 rv = Manage_subdevs(devlist->devname, mdfd,
1439 devlist->next, c.verbose, c.test,
1440 c.update, c.force);
1441 if (!rv && c.readonly < 0)
1442 rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1443 if (!rv && c.runstop > 0)
1444 rv = Manage_run(devlist->devname, mdfd, &c);
1445 if (!rv && c.runstop < 0)
1446 rv = Manage_stop(devlist->devname, mdfd, c.verbose, 0);
1447 break;
1448 case ASSEMBLE:
1449 if (devs_found == 1 && ident.uuid_set == 0 &&
1450 ident.super_minor == UnSet && ident.name[0] == 0 &&
1451 !c.scan ) {
1452 /* Only a device has been given, so get details from config file */
1453 struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1454 if (array_ident == NULL) {
1455 pr_err("%s not identified in config file.\n",
1456 devlist->devname);
1457 rv |= 1;
1458 if (mdfd >= 0)
1459 close(mdfd);
1460 } else {
1461 if (array_ident->autof == 0)
1462 array_ident->autof = c.autof;
1463 rv |= Assemble(ss, devlist->devname, array_ident,
1464 NULL, &c);
1465 }
1466 } else if (!c.scan)
1467 rv = Assemble(ss, devlist->devname, &ident,
1468 devlist->next, &c);
1469 else if (devs_found > 0) {
1470 if (c.update && devs_found > 1) {
1471 pr_err("can only update a single array at a time\n");
1472 exit(1);
1473 }
1474 if (c.backup_file && devs_found > 1) {
1475 pr_err("can only assemble a single array when providing a backup file.\n");
1476 exit(1);
1477 }
1478 for (dv = devlist; dv; dv = dv->next) {
1479 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1480 if (array_ident == NULL) {
1481 pr_err("%s not identified in config file.\n",
1482 dv->devname);
1483 rv |= 1;
1484 continue;
1485 }
1486 if (array_ident->autof == 0)
1487 array_ident->autof = c.autof;
1488 rv |= Assemble(ss, dv->devname, array_ident,
1489 NULL, &c);
1490 }
1491 } else {
1492 if (c.update) {
1493 pr_err("--update not meaningful with a --scan assembly.\n");
1494 exit(1);
1495 }
1496 if (c.backup_file) {
1497 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1498 exit(1);
1499 }
1500 rv = scan_assemble(ss, &c, &ident);
1501 }
1502
1503 break;
1504 case BUILD:
1505 if (c.delay == 0)
1506 c.delay = DEFAULT_BITMAP_DELAY;
1507 if (s.write_behind && !s.bitmap_file) {
1508 pr_err("write-behind mode requires a bitmap.\n");
1509 rv = 1;
1510 break;
1511 }
1512 if (s.raiddisks == 0) {
1513 pr_err("no raid-devices specified.\n");
1514 rv = 1;
1515 break;
1516 }
1517
1518 if (s.bitmap_file) {
1519 if (strcmp(s.bitmap_file, "internal") == 0 ||
1520 strcmp(s.bitmap_file, "clustered") == 0) {
1521 pr_err("'internal' and 'clustered' bitmaps not supported with --build\n");
1522 rv |= 1;
1523 break;
1524 }
1525 }
1526 rv = Build(devlist->devname, devlist->next, &s, &c);
1527 break;
1528 case CREATE:
1529 if (c.delay == 0)
1530 c.delay = DEFAULT_BITMAP_DELAY;
1531
1532 if (c.nodes) {
1533 if (!s.bitmap_file ||
1534 strcmp(s.bitmap_file, "clustered") != 0) {
1535 pr_err("--nodes argument only compatible with --bitmap=clustered\n");
1536 rv = 1;
1537 break;
1538 }
1539
1540 if (s.level != 1) {
1541 pr_err("--bitmap=clustered is currently supported with RAID mirror only\n");
1542 rv = 1;
1543 break;
1544 }
1545 }
1546
1547 if (s.write_behind && !s.bitmap_file) {
1548 pr_err("write-behind mode requires a bitmap.\n");
1549 rv = 1;
1550 break;
1551 }
1552 if (s.raiddisks == 0) {
1553 pr_err("no raid-devices specified.\n");
1554 rv = 1;
1555 break;
1556 }
1557
1558 rv = Create(ss, devlist->devname,
1559 ident.name, ident.uuid_set ? ident.uuid : NULL,
1560 devs_found-1, devlist->next,
1561 &s, &c, data_offset);
1562 break;
1563 case MISC:
1564 if (devmode == 'E') {
1565 if (devlist == NULL && !c.scan) {
1566 pr_err("No devices to examine\n");
1567 exit(2);
1568 }
1569 if (devlist == NULL)
1570 devlist = conf_get_devs();
1571 if (devlist == NULL) {
1572 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1573 exit(1);
1574 }
1575 rv = Examine(devlist, &c, ss);
1576 } else if (devmode == DetailPlatform) {
1577 rv = Detail_Platform(ss ? ss->ss : NULL, ss ? c.scan : 1,
1578 c.verbose, c.export,
1579 devlist ? devlist->devname : NULL);
1580 } else if (devlist == NULL) {
1581 if (devmode == 'S' && c.scan)
1582 rv = stop_scan(c.verbose);
1583 else if ((devmode == 'D' || devmode == Waitclean) &&
1584 c.scan)
1585 rv = misc_scan(devmode, &c);
1586 else if (devmode == UdevRules)
1587 rv = Write_rules(udev_filename);
1588 else {
1589 pr_err("No devices given.\n");
1590 exit(2);
1591 }
1592 } else
1593 rv = misc_list(devlist, &ident, dump_directory, ss, &c);
1594 break;
1595 case MONITOR:
1596 if (!devlist && !c.scan) {
1597 pr_err("Cannot monitor: need --scan or at least one device\n");
1598 rv = 1;
1599 break;
1600 }
1601 if (pidfile && !daemonise) {
1602 pr_err("Cannot write a pid file when not in daemon mode\n");
1603 rv = 1;
1604 break;
1605 }
1606 if (c.delay == 0) {
1607 if (get_linux_version() > 2006016)
1608 /* mdstat responds to poll */
1609 c.delay = 1000;
1610 else
1611 c.delay = 60;
1612 }
1613 rv = Monitor(devlist, mailaddr, program,
1614 &c, daemonise, oneshot,
1615 dosyslog, pidfile, increments,
1616 spare_sharing);
1617 break;
1618
1619 case GROW:
1620 if (array_size > 0) {
1621 /* alway impose array size first, independent of
1622 * anything else
1623 * Do not allow level or raid_disks changes at the
1624 * same time as that can be irreversibly destructive.
1625 */
1626 struct mdinfo sra;
1627 int err;
1628 if (s.raiddisks || s.level != UnSet) {
1629 pr_err("cannot change array size in same operation as changing raiddisks or level.\n"
1630 " Change size first, then check that data is still intact.\n");
1631 rv = 1;
1632 break;
1633 }
1634 if (sysfs_init(&sra, mdfd, NULL)) {
1635 rv = 1;
1636 break;
1637 }
1638 if (array_size == MAX_SIZE)
1639 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1640 else
1641 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1642 if (err < 0) {
1643 if (errno == E2BIG)
1644 pr_err("--array-size setting is too large.\n");
1645 else
1646 pr_err("current kernel does not support setting --array-size\n");
1647 rv = 1;
1648 break;
1649 }
1650 }
1651 if (devs_found > 1 && s.raiddisks == 0 && s.level == UnSet) {
1652 /* must be '-a'. */
1653 if (s.size > 0 || s.chunk ||
1654 s.layout_str || s.bitmap_file) {
1655 pr_err("--add cannot be used with other geometry changes in --grow mode\n");
1656 rv = 1;
1657 break;
1658 }
1659 for (dv = devlist->next; dv; dv = dv->next) {
1660 rv = Grow_Add_device(devlist->devname, mdfd,
1661 dv->devname);
1662 if (rv)
1663 break;
1664 }
1665 } else if (s.bitmap_file) {
1666 if (s.size > 0 || s.raiddisks || s.chunk ||
1667 s.layout_str || devs_found > 1) {
1668 pr_err("--bitmap changes cannot be used with other geometry changes in --grow mode\n");
1669 rv = 1;
1670 break;
1671 }
1672 if (c.delay == 0)
1673 c.delay = DEFAULT_BITMAP_DELAY;
1674 rv = Grow_addbitmap(devlist->devname, mdfd, &c, &s);
1675 } else if (grow_continue)
1676 rv = Grow_continue_command(devlist->devname,
1677 mdfd, c.backup_file,
1678 c.verbose);
1679 else if (s.size > 0 || s.raiddisks || s.layout_str ||
1680 s.chunk != 0 || s.level != UnSet ||
1681 data_offset != INVALID_SECTORS) {
1682 rv = Grow_reshape(devlist->devname, mdfd,
1683 devlist->next,
1684 data_offset, &c, &s);
1685 } else if (s.consistency_policy != UnSet) {
1686 rv = Grow_consistency_policy(devlist->devname, mdfd, &c, &s);
1687 } else if (array_size == 0)
1688 pr_err("no changes to --grow\n");
1689 break;
1690 case INCREMENTAL:
1691 if (rebuild_map) {
1692 RebuildMap();
1693 }
1694 if (c.scan) {
1695 rv = 1;
1696 if (devlist) {
1697 pr_err("In --incremental mode, a device cannot be given with --scan.\n");
1698 break;
1699 }
1700 if (c.runstop <= 0) {
1701 pr_err("--incremental --scan meaningless without --run.\n");
1702 break;
1703 }
1704 if (devmode == 'f') {
1705 pr_err("--incremental --scan --fail not supported.\n");
1706 break;
1707 }
1708 rv = IncrementalScan(&c, NULL);
1709 }
1710 if (!devlist) {
1711 if (!rebuild_map && !c.scan) {
1712 pr_err("--incremental requires a device.\n");
1713 rv = 1;
1714 }
1715 break;
1716 }
1717 if (devmode == 'f') {
1718 if (devlist->next) {
1719 pr_err("'--incremental --fail' can only handle one device.\n");
1720 rv = 1;
1721 break;
1722 }
1723 rv = IncrementalRemove(devlist->devname, remove_path,
1724 c.verbose);
1725 } else
1726 rv = Incremental(devlist, &c, ss);
1727 break;
1728 case AUTODETECT:
1729 autodetect();
1730 break;
1731 }
1732 exit(rv);
1733 }
1734
1735 static int scan_assemble(struct supertype *ss,
1736 struct context *c,
1737 struct mddev_ident *ident)
1738 {
1739 struct mddev_ident *a, *array_list = conf_get_ident(NULL);
1740 struct mddev_dev *devlist = conf_get_devs();
1741 struct map_ent *map = NULL;
1742 int cnt = 0;
1743 int rv = 0;
1744 int failures, successes;
1745
1746 if (conf_verify_devnames(array_list)) {
1747 pr_err("Duplicate MD device names in conf file were found.\n");
1748 return 1;
1749 }
1750 if (devlist == NULL) {
1751 pr_err("No devices listed in conf file were found.\n");
1752 return 1;
1753 }
1754 for (a = array_list; a; a = a->next) {
1755 a->assembled = 0;
1756 if (a->autof == 0)
1757 a->autof = c->autof;
1758 }
1759 if (map_lock(&map))
1760 pr_err("failed to get exclusive lock on mapfile\n");
1761 do {
1762 failures = 0;
1763 successes = 0;
1764 rv = 0;
1765 for (a = array_list; a; a = a->next) {
1766 int r;
1767 if (a->assembled)
1768 continue;
1769 if (a->devname &&
1770 strcasecmp(a->devname, "<ignore>") == 0)
1771 continue;
1772
1773 r = Assemble(ss, a->devname,
1774 a, NULL, c);
1775 if (r == 0) {
1776 a->assembled = 1;
1777 successes++;
1778 } else
1779 failures++;
1780 rv |= r;
1781 cnt++;
1782 }
1783 } while (failures && successes);
1784 if (c->homehost && cnt == 0) {
1785 /* Maybe we can auto-assemble something.
1786 * Repeatedly call Assemble in auto-assemble mode
1787 * until it fails
1788 */
1789 int rv2;
1790 int acnt;
1791 ident->autof = c->autof;
1792 do {
1793 struct mddev_dev *devlist = conf_get_devs();
1794 acnt = 0;
1795 do {
1796 rv2 = Assemble(ss, NULL,
1797 ident,
1798 devlist, c);
1799 if (rv2 == 0) {
1800 cnt++;
1801 acnt++;
1802 }
1803 } while (rv2 != 2);
1804 /* Incase there are stacked devices, we need to go around again */
1805 } while (acnt);
1806 if (cnt == 0 && rv == 0) {
1807 pr_err("No arrays found in config file or automatically\n");
1808 rv = 1;
1809 } else if (cnt)
1810 rv = 0;
1811 } else if (cnt == 0 && rv == 0) {
1812 pr_err("No arrays found in config file\n");
1813 rv = 1;
1814 }
1815 map_unlock(&map);
1816 return rv;
1817 }
1818
1819 static int misc_scan(char devmode, struct context *c)
1820 {
1821 /* apply --detail or --wait-clean to
1822 * all devices in /proc/mdstat
1823 */
1824 struct mdstat_ent *ms = mdstat_read(0, 1);
1825 struct mdstat_ent *e;
1826 struct map_ent *map = NULL;
1827 int members;
1828 int rv = 0;
1829
1830 for (members = 0; members <= 1; members++) {
1831 for (e = ms; e; e = e->next) {
1832 char *name = NULL;
1833 struct map_ent *me;
1834 struct stat stb;
1835 int member = e->metadata_version &&
1836 strncmp(e->metadata_version,
1837 "external:/", 10) == 0;
1838 if (members != member)
1839 continue;
1840 me = map_by_devnm(&map, e->devnm);
1841 if (me && me->path
1842 && strcmp(me->path, "/unknown") != 0)
1843 name = me->path;
1844 if (name == NULL || stat(name, &stb) != 0)
1845 name = get_md_name(e->devnm);
1846
1847 if (!name) {
1848 pr_err("cannot find device file for %s\n",
1849 e->devnm);
1850 continue;
1851 }
1852 if (devmode == 'D')
1853 rv |= Detail(name, c);
1854 else
1855 rv |= WaitClean(name, -1, c->verbose);
1856 put_md_name(name);
1857 }
1858 }
1859 free_mdstat(ms);
1860 return rv;
1861 }
1862
1863 static int stop_scan(int verbose)
1864 {
1865 /* apply --stop to all devices in /proc/mdstat */
1866 /* Due to possible stacking of devices, repeat until
1867 * nothing more can be stopped
1868 */
1869 int progress = 1, err;
1870 int last = 0;
1871 int rv = 0;
1872 do {
1873 struct mdstat_ent *ms = mdstat_read(0, 0);
1874 struct mdstat_ent *e;
1875
1876 if (!progress) last = 1;
1877 progress = 0; err = 0;
1878 for (e = ms; e; e = e->next) {
1879 char *name = get_md_name(e->devnm);
1880 int mdfd;
1881
1882 if (!name) {
1883 pr_err("cannot find device file for %s\n",
1884 e->devnm);
1885 continue;
1886 }
1887 mdfd = open_mddev(name, 1);
1888 if (mdfd >= 0) {
1889 if (Manage_stop(name, mdfd, verbose, !last))
1890 err = 1;
1891 else
1892 progress = 1;
1893 close(mdfd);
1894 }
1895
1896 put_md_name(name);
1897 }
1898 free_mdstat(ms);
1899 } while (!last && err);
1900 if (err)
1901 rv |= 1;
1902 return rv;
1903 }
1904
1905 static int misc_list(struct mddev_dev *devlist,
1906 struct mddev_ident *ident,
1907 char *dump_directory,
1908 struct supertype *ss, struct context *c)
1909 {
1910 struct mddev_dev *dv;
1911 int rv = 0;
1912
1913 for (dv = devlist; dv; dv = (rv & 16) ? NULL : dv->next) {
1914 int mdfd;
1915
1916 switch(dv->disposition) {
1917 case 'D':
1918 rv |= Detail(dv->devname, c);
1919 continue;
1920 case KillOpt: /* Zero superblock */
1921 if (ss)
1922 rv |= Kill(dv->devname, ss, c->force, c->verbose,0);
1923 else {
1924 int v = c->verbose;
1925 do {
1926 rv |= Kill(dv->devname, NULL, c->force, v, 0);
1927 v = -1;
1928 } while (rv == 0);
1929 rv &= ~2;
1930 }
1931 continue;
1932 case 'Q':
1933 rv |= Query(dv->devname);
1934 continue;
1935 case 'X':
1936 rv |= ExamineBitmap(dv->devname, c->brief, ss);
1937 continue;
1938 case ExamineBB:
1939 rv |= ExamineBadblocks(dv->devname, c->brief, ss);
1940 continue;
1941 case 'W':
1942 case WaitOpt:
1943 rv |= Wait(dv->devname);
1944 continue;
1945 case Waitclean:
1946 rv |= WaitClean(dv->devname, -1, c->verbose);
1947 continue;
1948 case KillSubarray:
1949 rv |= Kill_subarray(dv->devname, c->subarray, c->verbose);
1950 continue;
1951 case UpdateSubarray:
1952 if (c->update == NULL) {
1953 pr_err("-U/--update must be specified with --update-subarray\n");
1954 rv |= 1;
1955 continue;
1956 }
1957 rv |= Update_subarray(dv->devname, c->subarray,
1958 c->update, ident, c->verbose);
1959 continue;
1960 case Dump:
1961 rv |= Dump_metadata(dv->devname, dump_directory, c, ss);
1962 continue;
1963 case Restore:
1964 rv |= Restore_metadata(dv->devname, dump_directory, c, ss,
1965 (dv == devlist && dv->next == NULL));
1966 continue;
1967 case Action:
1968 rv |= SetAction(dv->devname, c->action);
1969 continue;
1970 }
1971
1972 if (dv->devname[0] != '/')
1973 mdfd = open_dev(dv->devname);
1974 if (dv->devname[0] == '/' || mdfd < 0)
1975 mdfd = open_mddev(dv->devname, 1);
1976
1977 if (mdfd >= 0) {
1978 switch(dv->disposition) {
1979 case 'R':
1980 c->runstop = 1;
1981 rv |= Manage_run(dv->devname, mdfd, c);
1982 break;
1983 case 'S':
1984 rv |= Manage_stop(dv->devname, mdfd, c->verbose, 0);
1985 break;
1986 case 'o':
1987 rv |= Manage_ro(dv->devname, mdfd, 1);
1988 break;
1989 case 'w':
1990 rv |= Manage_ro(dv->devname, mdfd, -1);
1991 break;
1992 }
1993 close(mdfd);
1994 } else
1995 rv |= 1;
1996 }
1997 return rv;
1998 }
1999
2000 int SetAction(char *dev, char *action)
2001 {
2002 int fd = open(dev, O_RDONLY);
2003 struct mdinfo mdi;
2004 int retval;
2005
2006 if (fd < 0) {
2007 pr_err("Couldn't open %s: %s\n", dev, strerror(errno));
2008 return 1;
2009 }
2010 retval = sysfs_init(&mdi, fd, NULL);
2011 close(fd);
2012 if (retval) {
2013 pr_err("%s is no an md array\n", dev);
2014 return 1;
2015 }
2016
2017 if (sysfs_set_str(&mdi, NULL, "sync_action", action) < 0) {
2018 pr_err("Count not set action for %s to %s: %s\n",
2019 dev, action, strerror(errno));
2020 return 1;
2021 }
2022 return 0;
2023 }
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