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