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Change char* to enum in context->update & refactor 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 struct mddev_ident ident;
53 char *configfile = NULL;
54 int devmode = 0;
55 int bitmap_fd = -1;
56 struct mddev_dev *devlist = NULL;
57 struct mddev_dev **devlistend = & devlist;
58 struct mddev_dev *dv;
59 mdu_array_info_t array;
60 int devs_found = 0;
61 int grow_continue = 0;
62 /* autof indicates whether and how to create device node.
63 * bottom 3 bits are style. Rest (when shifted) are number of parts
64 * 0 - unset
65 * 1 - don't create (no)
66 * 2 - if is_standard, then create (yes)
67 * 3 - create as 'md' - reject is_standard mdp (md)
68 * 4 - create as 'mdp' - reject is_standard md (mdp)
69 * 5 - default to md if not is_standard (md in config file)
70 * 6 - default to mdp if not is_standard (part, or mdp in config file)
71 */
72 struct context c = {
73 .require_homehost = 1,
74 };
75 struct shape s = {
76 .journaldisks = 0,
77 .level = UnSet,
78 .layout = UnSet,
79 .bitmap_chunk = UnSet,
80 .consistency_policy = CONSISTENCY_POLICY_UNKNOWN,
81 .data_offset = INVALID_SECTORS,
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 = NULL;
104
105 int mdfd = -1;
106 int locked = 0;
107
108 srandom(time(0) ^ getpid());
109
110 if (get_linux_version() < 2006015) {
111 pr_err("This version of mdadm does not support kernels older than 2.6.15\n");
112 exit(1);
113 }
114
115 ident_init(&ident);
116
117 while ((option_index = -1),
118 (opt = getopt_long(argc, argv, shortopt, long_options,
119 &option_index)) != -1) {
120 int newmode = mode;
121 /* firstly, some mode-independent options */
122 switch(opt) {
123 case HelpOptions:
124 print_help = 2;
125 continue;
126 case 'h':
127 print_help = 1;
128 continue;
129
130 case 'V':
131 fputs(Version, stderr);
132 exit(0);
133
134 case 'v': c.verbose++;
135 continue;
136
137 case 'q': c.verbose--;
138 continue;
139
140 case 'b':
141 if (mode == ASSEMBLE || mode == BUILD ||
142 mode == CREATE || mode == GROW ||
143 mode == INCREMENTAL || mode == MANAGE)
144 break; /* b means bitmap */
145 case Brief:
146 c.brief = 1;
147 continue;
148
149 case NoDevices:
150 c.no_devices = 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 AddJournal:
193 case 'r':
194 case Remove:
195 case Replace:
196 case With:
197 case 'f':
198 case Fail:
199 case ReAdd: /* re-add */
200 case ClusterConfirm:
201 if (!mode) {
202 newmode = MANAGE;
203 shortopt = short_bitmap_options;
204 }
205 break;
206
207 case 'A': newmode = ASSEMBLE;
208 shortopt = short_bitmap_auto_options;
209 break;
210 case 'B': newmode = BUILD;
211 shortopt = short_bitmap_auto_options;
212 break;
213 case 'C': newmode = CREATE;
214 shortopt = short_bitmap_auto_options;
215 break;
216 case 'F': newmode = MONITOR;
217 shortopt = short_monitor_options;
218 break;
219 case 'G': newmode = GROW;
220 shortopt = short_bitmap_options;
221 break;
222 case 'I': newmode = INCREMENTAL;
223 shortopt = short_bitmap_auto_options;
224 break;
225 case AutoDetect:
226 newmode = AUTODETECT;
227 break;
228
229 case MiscOpt:
230 case 'D':
231 case 'E':
232 case 'X':
233 case 'Q':
234 case ExamineBB:
235 case Dump:
236 case Restore:
237 case Action:
238 newmode = MISC;
239 break;
240
241 case 'R':
242 case 'S':
243 case 'o':
244 case 'w':
245 case 'W':
246 case WaitOpt:
247 case Waitclean:
248 case DetailPlatform:
249 case KillSubarray:
250 case UpdateSubarray:
251 case UdevRules:
252 case KillOpt:
253 if (!mode)
254 newmode = MISC;
255 break;
256
257 case NoSharing:
258 newmode = MONITOR;
259 break;
260 }
261 if (mode && newmode == mode) {
262 /* everybody happy ! */
263 } else if (mode && newmode != mode) {
264 /* not allowed.. */
265 pr_err("");
266 if (option_index >= 0)
267 fprintf(stderr, "--%s", long_options[option_index].name);
268 else
269 fprintf(stderr, "-%c", opt);
270 fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
271 map_num_s(modes, newmode),
272 map_num_s(modes, mode));
273 exit(2);
274 } else if (!mode && newmode) {
275 mode = newmode;
276 if (mode == MISC && devs_found) {
277 pr_err("No action given for %s in --misc mode\n",
278 devlist->devname);
279 cont_err("Action options must come before device names\n");
280 exit(2);
281 }
282 } else {
283 /* special case of -c --help */
284 if ((opt == 'c' || opt == ConfigFile) &&
285 (strncmp(optarg, "--h", 3) == 0 ||
286 strncmp(optarg, "-h", 2) == 0)) {
287 fputs(Help_config, stdout);
288 exit(0);
289 }
290
291 /* If first option is a device, don't force the mode yet */
292 if (opt == 1) {
293 if (devs_found == 0) {
294 dv = xmalloc(sizeof(*dv));
295 dv->devname = optarg;
296 dv->disposition = devmode;
297 dv->writemostly = writemostly;
298 dv->failfast = failfast;
299 dv->used = 0;
300 dv->next = NULL;
301 *devlistend = dv;
302 devlistend = &dv->next;
303
304 devs_found++;
305 continue;
306 }
307 /* No mode yet, and this is the second device ... */
308 pr_err("An option must be given to set the mode before a second device\n"
309 " (%s) is listed\n", optarg);
310 exit(2);
311 }
312 if (option_index >= 0)
313 pr_err("--%s", long_options[option_index].name);
314 else
315 pr_err("-%c", opt);
316 fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
317 exit(2);
318 }
319
320 /* if we just set the mode, then done */
321 switch(opt) {
322 case ManageOpt:
323 case MiscOpt:
324 case 'A':
325 case 'B':
326 case 'C':
327 case 'F':
328 case 'G':
329 case 'I':
330 case AutoDetect:
331 continue;
332 }
333 if (opt == 1) {
334 /* an undecorated option - must be a device name.
335 */
336
337 if (devs_found > 0 && devmode == DetailPlatform) {
338 pr_err("controller may only be specified once. %s ignored\n",
339 optarg);
340 continue;
341 }
342
343 if (devs_found > 0 && mode == MANAGE && !devmode) {
344 pr_err("Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
345 exit(2);
346 }
347 if (devs_found > 0 && mode == GROW && !devmode) {
348 pr_err("Must give -a/--add for devices to add: %s\n", optarg);
349 exit(2);
350 }
351 dv = xmalloc(sizeof(*dv));
352 dv->devname = optarg;
353 dv->disposition = devmode;
354 dv->writemostly = writemostly;
355 dv->failfast = failfast;
356 dv->used = 0;
357 dv->next = NULL;
358 *devlistend = dv;
359 devlistend = &dv->next;
360
361 devs_found++;
362 continue;
363 }
364
365 /* We've got a mode, and opt is now something else which
366 * could depend on the mode */
367 #define O(a,b) ((a<<16)|b)
368 switch (O(mode,opt)) {
369 case O(GROW,'c'):
370 case O(GROW,ChunkSize):
371 case O(CREATE,'c'):
372 case O(CREATE,ChunkSize):
373 case O(BUILD,'c'): /* chunk or rounding */
374 case O(BUILD,ChunkSize): /* chunk or rounding */
375 if (s.chunk) {
376 pr_err("chunk/rounding may only be specified once. Second value is %s.\n", optarg);
377 exit(2);
378 }
379 s.chunk = parse_size(optarg);
380 if (s.chunk == INVALID_SECTORS ||
381 s.chunk < 8 || (s.chunk&1)) {
382 pr_err("invalid chunk/rounding value: %s\n",
383 optarg);
384 exit(2);
385 }
386 /* Convert sectors to K */
387 s.chunk /= 2;
388 continue;
389
390 case O(INCREMENTAL, 'e'):
391 case O(CREATE,'e'):
392 case O(ASSEMBLE,'e'):
393 case O(MISC,'e'): /* set metadata (superblock) information */
394 if (ss) {
395 pr_err("metadata information already given\n");
396 exit(2);
397 }
398 for(i = 0; !ss && superlist[i]; i++)
399 ss = superlist[i]->match_metadata_desc(optarg);
400
401 if (!ss) {
402 pr_err("unrecognised metadata identifier: %s\n", optarg);
403 exit(2);
404 }
405 continue;
406
407 case O(MANAGE,'W'):
408 case O(MANAGE,WriteMostly):
409 case O(BUILD,'W'):
410 case O(BUILD,WriteMostly):
411 case O(CREATE,'W'):
412 case O(CREATE,WriteMostly):
413 /* set write-mostly for following devices */
414 writemostly = FlagSet;
415 continue;
416
417 case O(MANAGE,'w'):
418 /* clear write-mostly for following devices */
419 writemostly = FlagClear;
420 continue;
421
422 case O(MANAGE,FailFast):
423 case O(CREATE,FailFast):
424 failfast = FlagSet;
425 continue;
426 case O(MANAGE,NoFailFast):
427 failfast = FlagClear;
428 continue;
429
430 case O(GROW,'z'):
431 case O(CREATE,'z'):
432 case O(BUILD,'z'): /* size */
433 if (s.size > 0) {
434 pr_err("size may only be specified once. Second value is %s.\n", optarg);
435 exit(2);
436 }
437 if (strcmp(optarg, "max") == 0)
438 s.size = MAX_SIZE;
439 else {
440 s.size = parse_size(optarg);
441 if (s.size == INVALID_SECTORS || s.size < 8) {
442 pr_err("invalid size: %s\n", optarg);
443 exit(2);
444 }
445 /* convert sectors to K */
446 s.size /= 2;
447 }
448 continue;
449
450 case O(GROW,'Z'): /* array size */
451 if (array_size > 0) {
452 pr_err("array-size may only be specified once. Second value is %s.\n", optarg);
453 exit(2);
454 }
455 if (strcmp(optarg, "max") == 0)
456 array_size = MAX_SIZE;
457 else {
458 array_size = parse_size(optarg);
459 if (array_size == 0 ||
460 array_size == INVALID_SECTORS) {
461 pr_err("invalid array size: %s\n",
462 optarg);
463 exit(2);
464 }
465 }
466 continue;
467
468 case O(CREATE,DataOffset):
469 case O(GROW,DataOffset):
470 if (s.data_offset != INVALID_SECTORS) {
471 pr_err("data-offset may only be specified one. Second value is %s.\n", optarg);
472 exit(2);
473 }
474 if (mode == CREATE && strcmp(optarg, "variable") == 0)
475 s.data_offset = VARIABLE_OFFSET;
476 else
477 s.data_offset = parse_size(optarg);
478 if (s.data_offset == INVALID_SECTORS) {
479 pr_err("invalid data-offset: %s\n",
480 optarg);
481 exit(2);
482 }
483 continue;
484
485 case O(GROW,'l'):
486 case O(CREATE,'l'):
487 case O(BUILD,'l'): /* set raid level*/
488 if (s.level != UnSet) {
489 pr_err("raid level may only be set once. Second value is %s.\n", optarg);
490 exit(2);
491 }
492 s.level = map_name(pers, optarg);
493 if (s.level == UnSet) {
494 pr_err("invalid raid level: %s\n",
495 optarg);
496 exit(2);
497 }
498 if (s.level != 0 && s.level != LEVEL_LINEAR &&
499 s.level != 1 && s.level != LEVEL_MULTIPATH &&
500 s.level != LEVEL_FAULTY && s.level != 10 &&
501 mode == BUILD) {
502 pr_err("Raid level %s not permitted with --build.\n",
503 optarg);
504 exit(2);
505 }
506 if (s.sparedisks > 0 && s.level < 1 && s.level >= -1) {
507 pr_err("raid level %s is incompatible with spare-devices setting.\n",
508 optarg);
509 exit(2);
510 }
511 ident.level = s.level;
512 continue;
513
514 case O(GROW, 'p'): /* new layout */
515 case O(GROW, Layout):
516 if (s.layout_str) {
517 pr_err("layout may only be sent once. Second value was %s\n", optarg);
518 exit(2);
519 }
520 s.layout_str = optarg;
521 /* 'Grow' will parse the value */
522 continue;
523
524 case O(CREATE,'p'): /* raid5 layout */
525 case O(CREATE,Layout):
526 case O(BUILD,'p'): /* faulty layout */
527 case O(BUILD,Layout):
528 if (s.layout != UnSet) {
529 pr_err("layout may only be sent once. Second value was %s\n", optarg);
530 exit(2);
531 }
532 switch(s.level) {
533 default:
534 pr_err("layout not meaningful for %s arrays.\n",
535 map_num_s(pers, s.level));
536 exit(2);
537 case UnSet:
538 pr_err("raid level must be given before layout.\n");
539 exit(2);
540
541 case 0:
542 s.layout = map_name(r0layout, optarg);
543 if (s.layout == UnSet) {
544 pr_err("layout %s not understood for raid0.\n",
545 optarg);
546 exit(2);
547 }
548 break;
549 case 5:
550 s.layout = map_name(r5layout, optarg);
551 if (s.layout == UnSet) {
552 pr_err("layout %s not understood for raid5.\n",
553 optarg);
554 exit(2);
555 }
556 break;
557 case 6:
558 s.layout = map_name(r6layout, optarg);
559 if (s.layout == UnSet) {
560 pr_err("layout %s not understood for raid6.\n",
561 optarg);
562 exit(2);
563 }
564 break;
565
566 case 10:
567 s.layout = parse_layout_10(optarg);
568 if (s.layout < 0) {
569 pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
570 exit(2);
571 }
572 break;
573 case LEVEL_FAULTY:
574 /* Faulty
575 * modeNNN
576 */
577 s.layout = parse_layout_faulty(optarg);
578 if (s.layout == -1) {
579 pr_err("layout %s not understood for faulty.\n",
580 optarg);
581 exit(2);
582 }
583 break;
584 }
585 continue;
586
587 case O(CREATE,AssumeClean):
588 case O(BUILD,AssumeClean): /* assume clean */
589 case O(GROW,AssumeClean):
590 s.assume_clean = 1;
591 continue;
592
593 case O(GROW,'n'):
594 case O(CREATE,'n'):
595 case O(BUILD,'n'): /* number of raid disks */
596 if (s.raiddisks) {
597 pr_err("raid-devices set twice: %d and %s\n",
598 s.raiddisks, optarg);
599 exit(2);
600 }
601 if (parse_num(&s.raiddisks, optarg) != 0 || s.raiddisks <= 0) {
602 pr_err("invalid number of raid devices: %s\n",
603 optarg);
604 exit(2);
605 }
606 ident.raid_disks = s.raiddisks;
607 continue;
608 case O(ASSEMBLE, Nodes):
609 case O(GROW, Nodes):
610 case O(CREATE, Nodes):
611 if (parse_num(&c.nodes, optarg) != 0 || c.nodes < 2) {
612 pr_err("clustered array needs two nodes at least: %s\n",
613 optarg);
614 exit(2);
615 }
616 continue;
617 case O(CREATE, ClusterName):
618 case O(ASSEMBLE, ClusterName):
619 c.homecluster = optarg;
620 if (strlen(c.homecluster) > 64) {
621 pr_err("Cluster name too big.\n");
622 exit(2);
623 }
624 continue;
625 case O(CREATE,'x'): /* number of spare (eXtra) disks */
626 if (s.sparedisks) {
627 pr_err("spare-devices set twice: %d and %s\n",
628 s.sparedisks, optarg);
629 exit(2);
630 }
631 if (s.level != UnSet && s.level <= 0 && s.level >= -1) {
632 pr_err("spare-devices setting is incompatible with raid level %d\n",
633 s.level);
634 exit(2);
635 }
636 if (parse_num(&s.sparedisks, optarg) != 0 || s.sparedisks < 0) {
637 pr_err("invalid number of spare-devices: %s\n",
638 optarg);
639 exit(2);
640 }
641 continue;
642
643 case O(CREATE,'a'):
644 case O(CREATE,Auto):
645 case O(BUILD,'a'):
646 case O(BUILD,Auto):
647 case O(INCREMENTAL,'a'):
648 case O(INCREMENTAL,Auto):
649 case O(ASSEMBLE,'a'):
650 case O(ASSEMBLE,Auto): /* auto-creation of device node */
651 c.autof = parse_auto(optarg, "--auto flag", 0);
652 continue;
653 case O(BUILD,'f'): /* force honouring '-n 1' */
654 case O(BUILD,Force): /* force honouring '-n 1' */
655 case O(GROW,'f'): /* ditto */
656 case O(GROW,Force): /* ditto */
657 case O(CREATE,'f'): /* force honouring of device list */
658 case O(CREATE,Force): /* force honouring of device list */
659 case O(ASSEMBLE,'f'): /* force assembly */
660 case O(ASSEMBLE,Force): /* force assembly */
661 case O(MISC,'f'): /* force zero */
662 case O(MISC,Force): /* force zero */
663 case O(MANAGE,Force): /* add device which is too large */
664 c.force = 1;
665 continue;
666 /* now for the Assemble options */
667 case O(ASSEMBLE, FreezeReshape): /* Freeze reshape during
668 * initrd phase */
669 case O(INCREMENTAL, FreezeReshape):
670 c.freeze_reshape = 1;
671 continue;
672 case O(CREATE,'u'): /* uuid of array */
673 case O(ASSEMBLE,'u'): /* uuid of array */
674 if (ident.uuid_set) {
675 pr_err("uuid cannot be set twice. Second value %s.\n", optarg);
676 exit(2);
677 }
678 if (parse_uuid(optarg, ident.uuid))
679 ident.uuid_set = 1;
680 else {
681 pr_err("Bad uuid: %s\n", optarg);
682 exit(2);
683 }
684 continue;
685
686 case O(CREATE,'N'):
687 case O(ASSEMBLE,'N'):
688 case O(MISC,'N'):
689 if (ident.name[0]) {
690 pr_err("name cannot be set twice. Second value %s.\n", optarg);
691 exit(2);
692 }
693 if (mode == MISC && !c.subarray) {
694 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
695 exit(2);
696 }
697 if (strlen(optarg) > 32) {
698 pr_err("name '%s' is too long, 32 chars max.\n",
699 optarg);
700 exit(2);
701 }
702 strcpy(ident.name, optarg);
703 continue;
704
705 case O(ASSEMBLE,'m'): /* super-minor for array */
706 case O(ASSEMBLE,SuperMinor):
707 if (ident.super_minor != UnSet) {
708 pr_err("super-minor cannot be set twice. Second value: %s.\n", optarg);
709 exit(2);
710 }
711 if (strcmp(optarg, "dev") == 0)
712 ident.super_minor = -2;
713 else if (parse_num(&ident.super_minor, optarg) != 0 || ident.super_minor < 0) {
714 pr_err("Bad super-minor number: %s.\n", optarg);
715 exit(2);
716 }
717 continue;
718
719 case O(ASSEMBLE,'o'):
720 case O(MANAGE,'o'):
721 case O(CREATE,'o'):
722 c.readonly = 1;
723 continue;
724
725 case O(ASSEMBLE,'U'): /* update the superblock */
726 case O(MISC,'U'): {
727 enum update_opt print_mode = UOPT_HELP;
728 const char *error_addon = "update option";
729
730 if (c.update) {
731 pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
732 map_num(update_options, c.update), optarg);
733 exit(2);
734 }
735 if (mode == MISC && !c.subarray) {
736 pr_err("Only subarrays can be updated in misc mode\n");
737 exit(2);
738 }
739
740 c.update = map_name(update_options, optarg);
741
742 if (devmode == UpdateSubarray) {
743 print_mode = UOPT_SUBARRAY_ONLY;
744 error_addon = "update-subarray option";
745
746 if (c.update > UOPT_SUBARRAY_ONLY && c.update < UOPT_HELP)
747 c.update = UOPT_UNDEFINED;
748 }
749
750 switch (c.update) {
751 case UOPT_UNDEFINED:
752 pr_err("'--update=%s' is invalid %s. ",
753 optarg, error_addon);
754 outf = stderr;
755 case UOPT_HELP:
756 if (!outf)
757 outf = stdout;
758 fprint_update_options(outf, print_mode);
759 exit(outf == stdout ? 0 : 2);
760 case UOPT_BYTEORDER:
761 if (ss) {
762 pr_err("must not set metadata type with --update=byteorder.\n");
763 exit(2);
764 }
765 default:
766 break;
767 }
768 continue;
769 }
770 case O(MANAGE,'U'):
771 /* update=devicesize is allowed with --re-add */
772 if (devmode != 'A') {
773 pr_err("--update in Manage mode only allowed with --re-add.\n");
774 exit(1);
775 }
776 if (c.update) {
777 pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
778 map_num(update_options, c.update), optarg);
779 exit(2);
780 }
781 c.update = map_name(update_options, optarg);
782 if (c.update != UOPT_DEVICESIZE &&
783 c.update != UOPT_BBL &&
784 c.update != UOPT_NO_BBL &&
785 c.update != UOPT_FORCE_NO_BBL) {
786 pr_err("only 'devicesize', 'bbl', 'no-bbl', and 'force-no-bbl' can be updated with --re-add\n");
787 exit(2);
788 }
789 continue;
790
791 case O(INCREMENTAL,NoDegraded):
792 pr_err("--no-degraded is deprecated in Incremental mode\n");
793 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
794 c.runstop = -1; /* --stop isn't allowed for --assemble,
795 * so we overload slightly */
796 continue;
797
798 case O(ASSEMBLE,'c'):
799 case O(ASSEMBLE,ConfigFile):
800 case O(INCREMENTAL, 'c'):
801 case O(INCREMENTAL, ConfigFile):
802 case O(MISC, 'c'):
803 case O(MISC, ConfigFile):
804 case O(MONITOR,'c'):
805 case O(MONITOR,ConfigFile):
806 case O(CREATE,ConfigFile):
807 if (configfile) {
808 pr_err("configfile cannot be set twice. Second value is %s.\n", optarg);
809 exit(2);
810 }
811 configfile = optarg;
812 set_conffile(configfile);
813 /* FIXME possibly check that config file exists. Even parse it */
814 continue;
815 case O(ASSEMBLE,'s'): /* scan */
816 case O(MISC,'s'):
817 case O(MONITOR,'s'):
818 case O(INCREMENTAL,'s'):
819 c.scan = 1;
820 continue;
821
822 case O(MONITOR,'m'): /* mail address */
823 case O(MONITOR,EMail):
824 if (mailaddr)
825 pr_err("only specify one mailaddress. %s ignored.\n",
826 optarg);
827 else
828 mailaddr = optarg;
829 continue;
830
831 case O(MONITOR,'p'): /* alert program */
832 case O(MONITOR,ProgramOpt): /* alert program */
833 if (program)
834 pr_err("only specify one alter program. %s ignored.\n",
835 optarg);
836 else
837 program = optarg;
838 continue;
839
840 case O(MONITOR,'r'): /* rebuild increments */
841 case O(MONITOR,Increment):
842 if (parse_num(&increments, optarg) != 0
843 || increments > 99 || increments < 1) {
844 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
845 exit(2);
846 }
847 continue;
848
849 case O(MONITOR,'d'): /* delay in seconds */
850 case O(GROW, 'd'):
851 case O(BUILD,'d'): /* delay for bitmap updates */
852 case O(CREATE,'d'):
853 if (c.delay)
854 pr_err("only specify delay once. %s ignored.\n", optarg);
855 else if (parse_num(&c.delay, optarg) != 0 || c.delay < 1) {
856 pr_err("invalid delay: %s\n", optarg);
857 exit(2);
858 }
859 continue;
860 case O(MONITOR,'f'): /* daemonise */
861 case O(MONITOR,Fork):
862 daemonise = 1;
863 continue;
864 case O(MONITOR,'i'): /* pid */
865 if (pidfile)
866 pr_err("only specify one pid file. %s ignored.\n",
867 optarg);
868 else
869 pidfile = optarg;
870 continue;
871 case O(MONITOR,'1'): /* oneshot */
872 oneshot = 1;
873 spare_sharing = 0;
874 continue;
875 case O(MONITOR,'t'): /* test */
876 c.test = 1;
877 continue;
878 case O(MONITOR,'y'): /* log messages to syslog */
879 openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
880 dosyslog = 1;
881 continue;
882 case O(MONITOR, NoSharing):
883 spare_sharing = 0;
884 continue;
885
886 /* now the general management options. Some are applicable
887 * to other modes. None have arguments.
888 */
889 case O(GROW,'a'):
890 case O(GROW,Add):
891 case O(MANAGE,'a'):
892 case O(MANAGE,Add): /* add a drive */
893 devmode = 'a';
894 continue;
895 case O(MANAGE,AddSpare): /* add drive - never re-add */
896 devmode = 'S';
897 continue;
898 case O(MANAGE,AddJournal): /* add journal */
899 if (s.journaldisks && (s.level < 4 || s.level > 6)) {
900 pr_err("--add-journal is only supported for RAID level 4/5/6.\n");
901 exit(2);
902 }
903 devmode = 'j';
904 continue;
905 case O(MANAGE,ReAdd):
906 devmode = 'A';
907 continue;
908 case O(MANAGE,'r'): /* remove a drive */
909 case O(MANAGE,Remove):
910 devmode = 'r';
911 continue;
912 case O(MANAGE,'f'): /* set faulty */
913 case O(MANAGE,Fail):
914 case O(INCREMENTAL,'f'):
915 case O(INCREMENTAL,Remove):
916 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
917 * even though we will both fail and
918 * remove the device */
919 devmode = 'f';
920 continue;
921 case O(MANAGE, ClusterConfirm):
922 devmode = 'c';
923 continue;
924 case O(MANAGE,Replace):
925 /* Mark these devices for replacement */
926 devmode = 'R';
927 continue;
928 case O(MANAGE,With):
929 /* These are the replacements to use */
930 if (devmode != 'R') {
931 pr_err("--with must follow --replace\n");
932 exit(2);
933 }
934 devmode = 'W';
935 continue;
936 case O(INCREMENTAL,'R'):
937 case O(MANAGE,'R'):
938 case O(ASSEMBLE,'R'):
939 case O(BUILD,'R'):
940 case O(CREATE,'R'): /* Run the array */
941 if (c.runstop < 0) {
942 pr_err("Cannot both Stop and Run an array\n");
943 exit(2);
944 }
945 c.runstop = 1;
946 continue;
947 case O(MANAGE,'S'):
948 if (c.runstop > 0) {
949 pr_err("Cannot both Run and Stop an array\n");
950 exit(2);
951 }
952 c.runstop = -1;
953 continue;
954 case O(MANAGE,'t'):
955 c.test = 1;
956 continue;
957
958 case O(MISC,'Q'):
959 case O(MISC,'D'):
960 case O(MISC,'E'):
961 case O(MISC,KillOpt):
962 case O(MISC,'R'):
963 case O(MISC,'S'):
964 case O(MISC,'X'):
965 case O(MISC, ExamineBB):
966 case O(MISC,'o'):
967 case O(MISC,'w'):
968 case O(MISC,'W'):
969 case O(MISC, WaitOpt):
970 case O(MISC, Waitclean):
971 case O(MISC, DetailPlatform):
972 case O(MISC, KillSubarray):
973 case O(MISC, UpdateSubarray):
974 case O(MISC, Dump):
975 case O(MISC, Restore):
976 case O(MISC ,Action):
977 if (opt == KillSubarray || opt == UpdateSubarray) {
978 if (c.subarray) {
979 pr_err("subarray can only be specified once\n");
980 exit(2);
981 }
982 c.subarray = optarg;
983 }
984 if (opt == Action) {
985 if (c.action) {
986 pr_err("Only one --action can be specified\n");
987 exit(2);
988 }
989 if (strcmp(optarg, "idle") == 0 ||
990 strcmp(optarg, "frozen") == 0 ||
991 strcmp(optarg, "check") == 0 ||
992 strcmp(optarg, "repair") == 0)
993 c.action = optarg;
994 else {
995 pr_err("action must be one of idle, frozen, check, repair\n");
996 exit(2);
997 }
998 }
999 if (devmode && devmode != opt &&
1000 (devmode == 'E' ||
1001 (opt == 'E' && devmode != 'Q'))) {
1002 pr_err("--examine/-E cannot be given with ");
1003 if (devmode == 'E') {
1004 if (option_index >= 0)
1005 fprintf(stderr, "--%s\n",
1006 long_options[option_index].name);
1007 else
1008 fprintf(stderr, "-%c\n", opt);
1009 } else if (isalpha(devmode))
1010 fprintf(stderr, "-%c\n", devmode);
1011 else
1012 fprintf(stderr, "previous option\n");
1013 exit(2);
1014 }
1015 devmode = opt;
1016 if (opt == Dump || opt == Restore) {
1017 if (dump_directory != NULL) {
1018 pr_err("dump/restore directory specified twice: %s and %s\n",
1019 dump_directory, optarg);
1020 exit(2);
1021 }
1022 dump_directory = optarg;
1023 }
1024 continue;
1025 case O(MISC, UdevRules):
1026 if (devmode && devmode != opt) {
1027 pr_err("--udev-rules must be the only option.\n");
1028 } else {
1029 if (udev_filename)
1030 pr_err("only specify one udev rule filename. %s ignored.\n",
1031 optarg);
1032 else
1033 udev_filename = optarg;
1034 }
1035 devmode = opt;
1036 continue;
1037 case O(MISC,'t'):
1038 c.test = 1;
1039 continue;
1040
1041 case O(MISC, Sparc22):
1042 if (devmode != 'E') {
1043 pr_err("--sparc2.2 only allowed with --examine\n");
1044 exit(2);
1045 }
1046 c.SparcAdjust = 1;
1047 continue;
1048
1049 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
1050 case O(ASSEMBLE,Bitmap):
1051 if (!optarg) {
1052 pr_err("bitmap file needed with -b in --assemble mode\n");
1053 exit(2);
1054 }
1055 if (strcmp(optarg, "internal") == 0 ||
1056 strcmp(optarg, "clustered") == 0) {
1057 pr_err("no need to specify --bitmap when assembling"
1058 " arrays with internal or clustered bitmap\n");
1059 continue;
1060 }
1061 bitmap_fd = open(optarg, O_RDWR);
1062 if (!*optarg || bitmap_fd < 0) {
1063 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1064 exit(2);
1065 }
1066 ident.bitmap_fd = bitmap_fd; /* for Assemble */
1067 continue;
1068
1069 case O(ASSEMBLE, BackupFile):
1070 case O(GROW, BackupFile):
1071 /* Specify a file into which grow might place a backup,
1072 * or from which assemble might recover a backup
1073 */
1074 if (c.backup_file) {
1075 pr_err("backup file already specified, rejecting %s\n", optarg);
1076 exit(2);
1077 }
1078 c.backup_file = optarg;
1079 continue;
1080
1081 case O(GROW, Continue):
1082 /* Continue interrupted grow
1083 */
1084 grow_continue = 1;
1085 continue;
1086 case O(ASSEMBLE, InvalidBackup):
1087 /* Acknowledge that the backupfile is invalid, but ask
1088 * to continue anyway
1089 */
1090 c.invalid_backup = 1;
1091 continue;
1092
1093 case O(BUILD,'b'):
1094 case O(BUILD,Bitmap):
1095 case O(CREATE,'b'):
1096 case O(CREATE,Bitmap): /* here we create the bitmap */
1097 case O(GROW,'b'):
1098 case O(GROW,Bitmap):
1099 if (s.bitmap_file) {
1100 pr_err("bitmap cannot be set twice. Second value: %s.\n", optarg);
1101 exit(2);
1102 }
1103 if (strcmp(optarg, "internal") == 0 ||
1104 strcmp(optarg, "none") == 0 ||
1105 strchr(optarg, '/') != NULL) {
1106 s.bitmap_file = optarg;
1107 continue;
1108 }
1109 if (strcmp(optarg, "clustered") == 0) {
1110 s.bitmap_file = optarg;
1111 /* Set the default number of cluster nodes
1112 * to 4 if not already set by user
1113 */
1114 if (c.nodes < 1)
1115 c.nodes = 4;
1116 continue;
1117 }
1118 /* probable typo */
1119 pr_err("bitmap file must contain a '/', or be 'internal', or be 'clustered', or 'none'\n"
1120 " not '%s'\n", optarg);
1121 exit(2);
1122
1123 case O(GROW,BitmapChunk):
1124 case O(BUILD,BitmapChunk):
1125 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1126 s.bitmap_chunk = parse_size(optarg);
1127 if (s.bitmap_chunk == 0 ||
1128 s.bitmap_chunk == INVALID_SECTORS ||
1129 s.bitmap_chunk & (s.bitmap_chunk - 1)) {
1130 pr_err("invalid bitmap chunksize: %s\n",
1131 optarg);
1132 exit(2);
1133 }
1134 s.bitmap_chunk = s.bitmap_chunk * 512;
1135 continue;
1136
1137 case O(GROW, WriteBehind):
1138 case O(BUILD, WriteBehind):
1139 case O(CREATE, WriteBehind):
1140 s.write_behind = DEFAULT_MAX_WRITE_BEHIND;
1141 if (optarg &&
1142 (parse_num(&s.write_behind, optarg) != 0 ||
1143 s.write_behind < 0 || s.write_behind > 16383)) {
1144 pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n",
1145 optarg);
1146 exit(2);
1147 }
1148 continue;
1149 case O(INCREMENTAL, 'r'):
1150 case O(INCREMENTAL, RebuildMapOpt):
1151 rebuild_map = 1;
1152 continue;
1153 case O(INCREMENTAL, IncrementalPath):
1154 remove_path = optarg;
1155 continue;
1156 case O(CREATE, WriteJournal):
1157 if (s.journaldisks) {
1158 pr_err("Please specify only one journal device for the array.\n");
1159 pr_err("Ignoring --write-journal %s...\n", optarg);
1160 continue;
1161 }
1162 dv = xmalloc(sizeof(*dv));
1163 dv->devname = optarg;
1164 dv->disposition = 'j'; /* WriteJournal */
1165 dv->used = 0;
1166 dv->next = NULL;
1167 *devlistend = dv;
1168 devlistend = &dv->next;
1169 devs_found++;
1170
1171 s.journaldisks = 1;
1172 continue;
1173 case O(CREATE, 'k'):
1174 case O(GROW, 'k'):
1175 s.consistency_policy = map_name(consistency_policies,
1176 optarg);
1177 if (s.consistency_policy < CONSISTENCY_POLICY_RESYNC) {
1178 pr_err("Invalid consistency policy: %s\n",
1179 optarg);
1180 exit(2);
1181 }
1182 continue;
1183 }
1184 /* We have now processed all the valid options. Anything else is
1185 * an error
1186 */
1187 if (option_index > 0)
1188 pr_err(":option --%s not valid in %s mode\n",
1189 long_options[option_index].name,
1190 map_num_s(modes, mode));
1191 else
1192 pr_err("option -%c not valid in %s mode\n",
1193 opt, map_num_s(modes, mode));
1194 exit(2);
1195
1196 }
1197
1198 if (print_help) {
1199 char *help_text;
1200 if (print_help == 2)
1201 help_text = OptionHelp;
1202 else
1203 help_text = mode_help[mode];
1204 if (help_text == NULL)
1205 help_text = Help;
1206 fputs(help_text,stdout);
1207 exit(0);
1208 }
1209
1210 if (s.journaldisks) {
1211 if (s.level < 4 || s.level > 6) {
1212 pr_err("--write-journal is only supported for RAID level 4/5/6.\n");
1213 exit(2);
1214 }
1215 if (s.consistency_policy != CONSISTENCY_POLICY_UNKNOWN &&
1216 s.consistency_policy != CONSISTENCY_POLICY_JOURNAL) {
1217 pr_err("--write-journal is not supported with consistency policy: %s\n",
1218 map_num_s(consistency_policies, s.consistency_policy));
1219 exit(2);
1220 }
1221 }
1222
1223 if (mode == CREATE &&
1224 s.consistency_policy != CONSISTENCY_POLICY_UNKNOWN) {
1225 if (s.level <= 0) {
1226 pr_err("--consistency-policy not meaningful with level %s.\n",
1227 map_num_s(pers, s.level));
1228 exit(2);
1229 } else if (s.consistency_policy == CONSISTENCY_POLICY_JOURNAL &&
1230 !s.journaldisks) {
1231 pr_err("--write-journal is required for consistency policy: %s\n",
1232 map_num_s(consistency_policies, s.consistency_policy));
1233 exit(2);
1234 } else if (s.consistency_policy == CONSISTENCY_POLICY_PPL &&
1235 s.level != 5) {
1236 pr_err("PPL consistency policy is only supported for RAID level 5.\n");
1237 exit(2);
1238 } else if (s.consistency_policy == CONSISTENCY_POLICY_BITMAP &&
1239 (!s.bitmap_file ||
1240 strcmp(s.bitmap_file, "none") == 0)) {
1241 pr_err("--bitmap is required for consistency policy: %s\n",
1242 map_num_s(consistency_policies, s.consistency_policy));
1243 exit(2);
1244 } else if (s.bitmap_file &&
1245 strcmp(s.bitmap_file, "none") != 0 &&
1246 s.consistency_policy != CONSISTENCY_POLICY_BITMAP &&
1247 s.consistency_policy != CONSISTENCY_POLICY_JOURNAL) {
1248 pr_err("--bitmap is not compatible with consistency policy: %s\n",
1249 map_num_s(consistency_policies, s.consistency_policy));
1250 exit(2);
1251 }
1252 }
1253
1254 if (!mode && devs_found) {
1255 mode = MISC;
1256 devmode = 'Q';
1257 if (devlist->disposition == 0)
1258 devlist->disposition = devmode;
1259 }
1260 if (!mode) {
1261 fputs(Usage, stderr);
1262 exit(2);
1263 }
1264
1265 /* Ok, got the option parsing out of the way
1266 * hopefully it's mostly right but there might be some stuff
1267 * missing
1268 *
1269 * That is mostly checked in the per-mode stuff but...
1270 *
1271 * For @,B,C and A without -s, the first device listed must be
1272 * an md device. We check that here and open it.
1273 */
1274
1275 if (mode == MANAGE || mode == BUILD || mode == CREATE ||
1276 mode == GROW || (mode == ASSEMBLE && ! c.scan)) {
1277 struct stat stb;
1278 int ret;
1279
1280 if (devs_found < 1) {
1281 pr_err("an md device must be given in this mode\n");
1282 exit(2);
1283 }
1284 if ((int)ident.super_minor == -2 && c.autof) {
1285 pr_err("--super-minor=dev is incompatible with --auto\n");
1286 exit(2);
1287 }
1288 if (mode == MANAGE || mode == GROW) {
1289 mdfd = open_mddev(devlist->devname, 1);
1290 if (mdfd < 0)
1291 exit(1);
1292
1293 ret = fstat(mdfd, &stb);
1294 if (ret) {
1295 pr_err("fstat failed on %s.\n", devlist->devname);
1296 exit(1);
1297 }
1298 } else {
1299 char *bname = basename(devlist->devname);
1300
1301 if (strlen(bname) > MD_NAME_MAX) {
1302 pr_err("Name %s is too long.\n", devlist->devname);
1303 exit(1);
1304 }
1305
1306 ret = stat(devlist->devname, &stb);
1307 if (ident.super_minor == -2 && ret != 0) {
1308 pr_err("--super-minor=dev given, and listed device %s doesn't exist.\n",
1309 devlist->devname);
1310 exit(1);
1311 }
1312
1313 if (!ret && !stat_is_md_dev(&stb)) {
1314 pr_err("device %s exists but is not an md array.\n", devlist->devname);
1315 exit(1);
1316 }
1317 }
1318 if (ident.super_minor == -2)
1319 ident.super_minor = minor(stb.st_rdev);
1320 }
1321
1322 if (s.raiddisks) {
1323 if (s.raiddisks == 1 && !c.force && s.level != LEVEL_FAULTY) {
1324 pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1325 " a mistake. If you really mean it you will need to specify --force before\n"
1326 " setting the number of drives.\n");
1327 exit(2);
1328 }
1329 }
1330
1331 if (c.homehost == NULL && c.require_homehost)
1332 c.homehost = conf_get_homehost(&c.require_homehost);
1333 if (c.homehost == NULL || strcasecmp(c.homehost, "<system>") == 0) {
1334 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1335 sys_hostname[sizeof(sys_hostname)-1] = 0;
1336 c.homehost = sys_hostname;
1337 }
1338 }
1339 if (c.homehost &&
1340 (!c.homehost[0] || strcasecmp(c.homehost, "<none>") == 0)) {
1341 c.homehost = NULL;
1342 c.require_homehost = 0;
1343 }
1344
1345 rv = 0;
1346
1347 set_hooks(); /* set hooks from libs */
1348
1349 if (c.homecluster == NULL && (c.nodes > 0)) {
1350 c.homecluster = conf_get_homecluster();
1351 if (c.homecluster == NULL)
1352 rv = get_cluster_name(&c.homecluster);
1353 if (rv) {
1354 pr_err("The md can't get cluster name\n");
1355 exit(1);
1356 }
1357 }
1358
1359 if (c.update && c.update == UOPT_NODES && c.nodes == 0) {
1360 pr_err("Please specify nodes number with --nodes\n");
1361 exit(1);
1362 }
1363
1364 if (c.backup_file && s.data_offset != INVALID_SECTORS) {
1365 pr_err("--backup-file and --data-offset are incompatible\n");
1366 exit(2);
1367 }
1368
1369 if ((mode == MISC && devmode == 'E') ||
1370 (mode == MONITOR && spare_sharing == 0))
1371 /* Anyone may try this */;
1372 else if (geteuid() != 0) {
1373 pr_err("must be super-user to perform this action\n");
1374 exit(1);
1375 }
1376
1377 ident.autof = c.autof;
1378
1379 if (c.scan && c.verbose < 2)
1380 /* --scan implied --brief unless -vv */
1381 c.brief = 1;
1382
1383 if (mode == CREATE) {
1384 if (s.bitmap_file && strcmp(s.bitmap_file, "clustered") == 0) {
1385 locked = cluster_get_dlmlock();
1386 if (locked != 1)
1387 exit(1);
1388 }
1389 } else if (mode == MANAGE || mode == GROW || mode == INCREMENTAL) {
1390 if (!md_get_array_info(mdfd, &array) && (devmode != 'c')) {
1391 if (array.state & (1 << MD_SB_CLUSTERED)) {
1392 locked = cluster_get_dlmlock();
1393 if (locked != 1)
1394 exit(1);
1395 }
1396 }
1397 }
1398
1399 switch(mode) {
1400 case MANAGE:
1401 /* readonly, add/remove, readwrite, runstop */
1402 if (c.readonly > 0)
1403 rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1404 if (!rv && devs_found > 1)
1405 rv = Manage_subdevs(devlist->devname, mdfd,
1406 devlist->next, c.verbose,
1407 c.test, c.update, c.force);
1408 if (!rv && c.readonly < 0)
1409 rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1410 if (!rv && c.runstop > 0)
1411 rv = Manage_run(devlist->devname, mdfd, &c);
1412 if (!rv && c.runstop < 0)
1413 rv = Manage_stop(devlist->devname, mdfd, c.verbose, 0);
1414 break;
1415 case ASSEMBLE:
1416 if (!c.scan && c.runstop == -1) {
1417 pr_err("--no-degraded not meaningful without a --scan assembly.\n");
1418 exit(1);
1419 } else if (devs_found == 1 && ident.uuid_set == 0 &&
1420 ident.super_minor == UnSet && ident.name[0] == 0 &&
1421 !c.scan) {
1422 /* Only a device has been given, so get details from config file */
1423 struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1424 if (array_ident == NULL) {
1425 pr_err("%s not identified in config file.\n",
1426 devlist->devname);
1427 rv |= 1;
1428 if (mdfd >= 0)
1429 close(mdfd);
1430 } else {
1431 if (array_ident->autof == 0)
1432 array_ident->autof = c.autof;
1433 rv |= Assemble(ss, devlist->devname, array_ident,
1434 NULL, &c);
1435 }
1436 } else if (!c.scan)
1437 rv = Assemble(ss, devlist->devname, &ident,
1438 devlist->next, &c);
1439 else if (devs_found > 0) {
1440 if (c.update && devs_found > 1) {
1441 pr_err("can only update a single array at a time\n");
1442 exit(1);
1443 }
1444 if (c.backup_file && devs_found > 1) {
1445 pr_err("can only assemble a single array when providing a backup file.\n");
1446 exit(1);
1447 }
1448 for (dv = devlist; dv; dv = dv->next) {
1449 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1450 if (array_ident == NULL) {
1451 pr_err("%s not identified in config file.\n",
1452 dv->devname);
1453 rv |= 1;
1454 continue;
1455 }
1456 if (array_ident->autof == 0)
1457 array_ident->autof = c.autof;
1458 rv |= Assemble(ss, dv->devname, array_ident,
1459 NULL, &c);
1460 }
1461 } else {
1462 if (c.update) {
1463 pr_err("--update not meaningful with a --scan assembly.\n");
1464 exit(1);
1465 }
1466 if (c.backup_file) {
1467 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1468 exit(1);
1469 }
1470 rv = scan_assemble(ss, &c, &ident);
1471 }
1472
1473 break;
1474 case BUILD:
1475 if (c.delay == 0)
1476 c.delay = DEFAULT_BITMAP_DELAY;
1477 if (s.write_behind && !s.bitmap_file) {
1478 pr_err("write-behind mode requires a bitmap.\n");
1479 rv = 1;
1480 break;
1481 }
1482 if (s.raiddisks == 0) {
1483 pr_err("no raid-devices specified.\n");
1484 rv = 1;
1485 break;
1486 }
1487
1488 if (s.bitmap_file) {
1489 if (strcmp(s.bitmap_file, "internal") == 0 ||
1490 strcmp(s.bitmap_file, "clustered") == 0) {
1491 pr_err("'internal' and 'clustered' bitmaps not supported with --build\n");
1492 rv |= 1;
1493 break;
1494 }
1495 }
1496 rv = Build(devlist->devname, devlist->next, &s, &c);
1497 break;
1498 case CREATE:
1499 if (c.delay == 0)
1500 c.delay = DEFAULT_BITMAP_DELAY;
1501
1502 if (c.nodes) {
1503 if (!s.bitmap_file ||
1504 strcmp(s.bitmap_file, "clustered") != 0) {
1505 pr_err("--nodes argument only compatible with --bitmap=clustered\n");
1506 rv = 1;
1507 break;
1508 }
1509
1510 if (s.level != 1 && s.level != 10) {
1511 pr_err("--bitmap=clustered is currently supported with raid1/10 only\n");
1512 rv = 1;
1513 break;
1514 }
1515 if (s.level == 10 && !(is_near_layout_10(s.layout) || s.layout == UnSet)) {
1516 pr_err("only near layout is supported with clustered raid10\n");
1517 rv = 1;
1518 break;
1519 }
1520 }
1521
1522 if (s.write_behind && !s.bitmap_file) {
1523 pr_err("write-behind mode requires a bitmap.\n");
1524 rv = 1;
1525 break;
1526 }
1527 if (s.raiddisks == 0) {
1528 pr_err("no raid-devices specified.\n");
1529 rv = 1;
1530 break;
1531 }
1532
1533 rv = Create(ss, devlist->devname,
1534 ident.name, ident.uuid_set ? ident.uuid : NULL,
1535 devs_found - 1, devlist->next, &s, &c);
1536 break;
1537 case MISC:
1538 if (devmode == 'E') {
1539 if (devlist == NULL && !c.scan) {
1540 pr_err("No devices to examine\n");
1541 exit(2);
1542 }
1543 if (devlist == NULL)
1544 devlist = conf_get_devs();
1545 if (devlist == NULL) {
1546 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1547 exit(1);
1548 }
1549 rv = Examine(devlist, &c, ss);
1550 } else if (devmode == DetailPlatform) {
1551 rv = Detail_Platform(ss ? ss->ss : NULL, ss ? c.scan : 1,
1552 c.verbose, c.export,
1553 devlist ? devlist->devname : NULL);
1554 } else if (devlist == NULL) {
1555 if (devmode == 'S' && c.scan)
1556 rv = stop_scan(c.verbose);
1557 else if ((devmode == 'D' || devmode == Waitclean) &&
1558 c.scan)
1559 rv = misc_scan(devmode, &c);
1560 else if (devmode == UdevRules)
1561 rv = Write_rules(udev_filename);
1562 else {
1563 pr_err("No devices given.\n");
1564 exit(2);
1565 }
1566 } else
1567 rv = misc_list(devlist, &ident, dump_directory, ss, &c);
1568 break;
1569 case MONITOR:
1570 if (!devlist && !c.scan) {
1571 pr_err("Cannot monitor: need --scan or at least one device\n");
1572 rv = 1;
1573 break;
1574 }
1575 if (pidfile && !daemonise) {
1576 pr_err("Cannot write a pid file when not in daemon mode\n");
1577 rv = 1;
1578 break;
1579 }
1580 if (c.delay == 0) {
1581 c.delay = conf_get_monitor_delay();
1582 if (!c.delay)
1583 c.delay = 60;
1584 }
1585 rv = Monitor(devlist, mailaddr, program,
1586 &c, daemonise, oneshot,
1587 dosyslog, pidfile, increments,
1588 spare_sharing);
1589 break;
1590
1591 case GROW:
1592 if (array_size > 0) {
1593 /* alway impose array size first, independent of
1594 * anything else
1595 * Do not allow level or raid_disks changes at the
1596 * same time as that can be irreversibly destructive.
1597 */
1598 struct mdinfo sra;
1599 int err;
1600 if (s.raiddisks || s.level != UnSet) {
1601 pr_err("cannot change array size in same operation as changing raiddisks or level.\n"
1602 " Change size first, then check that data is still intact.\n");
1603 rv = 1;
1604 break;
1605 }
1606 if (sysfs_init(&sra, mdfd, NULL)) {
1607 rv = 1;
1608 break;
1609 }
1610 if (array_size == MAX_SIZE)
1611 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1612 else
1613 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1614 if (err < 0) {
1615 if (errno == E2BIG)
1616 pr_err("--array-size setting is too large.\n");
1617 else
1618 pr_err("current kernel does not support setting --array-size\n");
1619 rv = 1;
1620 break;
1621 }
1622 }
1623 if (devs_found > 1 && s.raiddisks == 0 && s.level == UnSet) {
1624 /* must be '-a'. */
1625 if (s.size > 0 || s.chunk ||
1626 s.layout_str || s.bitmap_file) {
1627 pr_err("--add cannot be used with other geometry changes in --grow mode\n");
1628 rv = 1;
1629 break;
1630 }
1631 for (dv = devlist->next; dv; dv = dv->next) {
1632 rv = Grow_Add_device(devlist->devname, mdfd,
1633 dv->devname);
1634 if (rv)
1635 break;
1636 }
1637 } else if (s.bitmap_file) {
1638 if (s.size > 0 || s.raiddisks || s.chunk ||
1639 s.layout_str || devs_found > 1) {
1640 pr_err("--bitmap changes cannot be used with other geometry changes in --grow mode\n");
1641 rv = 1;
1642 break;
1643 }
1644 if (c.delay == 0)
1645 c.delay = DEFAULT_BITMAP_DELAY;
1646 rv = Grow_addbitmap(devlist->devname, mdfd, &c, &s);
1647 } else if (grow_continue)
1648 rv = Grow_continue_command(devlist->devname,
1649 mdfd, c.backup_file,
1650 c.verbose);
1651 else if (s.size > 0 || s.raiddisks || s.layout_str ||
1652 s.chunk != 0 || s.level != UnSet ||
1653 s.data_offset != INVALID_SECTORS) {
1654 rv = Grow_reshape(devlist->devname, mdfd,
1655 devlist->next, &c, &s);
1656 } else if (s.consistency_policy != CONSISTENCY_POLICY_UNKNOWN) {
1657 rv = Grow_consistency_policy(devlist->devname, mdfd, &c, &s);
1658 } else if (array_size == 0)
1659 pr_err("no changes to --grow\n");
1660 break;
1661 case INCREMENTAL:
1662 if (rebuild_map) {
1663 RebuildMap();
1664 }
1665 if (c.scan) {
1666 rv = 1;
1667 if (devlist) {
1668 pr_err("In --incremental mode, a device cannot be given with --scan.\n");
1669 break;
1670 }
1671 if (c.runstop <= 0) {
1672 pr_err("--incremental --scan meaningless without --run.\n");
1673 break;
1674 }
1675 if (devmode == 'f') {
1676 pr_err("--incremental --scan --fail not supported.\n");
1677 break;
1678 }
1679 rv = IncrementalScan(&c, NULL);
1680 }
1681 if (!devlist) {
1682 if (!rebuild_map && !c.scan) {
1683 pr_err("--incremental requires a device.\n");
1684 rv = 1;
1685 }
1686 break;
1687 }
1688 if (devmode == 'f') {
1689 if (devlist->next) {
1690 pr_err("'--incremental --fail' can only handle one device.\n");
1691 rv = 1;
1692 break;
1693 }
1694 rv = IncrementalRemove(devlist->devname, remove_path,
1695 c.verbose);
1696 } else
1697 rv = Incremental(devlist, &c, ss);
1698 break;
1699 case AUTODETECT:
1700 autodetect();
1701 break;
1702 }
1703 if (locked)
1704 cluster_release_dlmlock();
1705 close_fd(&mdfd);
1706 exit(rv);
1707 }
1708
1709 static int scan_assemble(struct supertype *ss,
1710 struct context *c,
1711 struct mddev_ident *ident)
1712 {
1713 struct mddev_ident *a, *array_list = conf_get_ident(NULL);
1714 struct mddev_dev *devlist = conf_get_devs();
1715 struct map_ent *map = NULL;
1716 int cnt = 0;
1717 int rv = 0;
1718 int failures, successes;
1719
1720 if (conf_verify_devnames(array_list)) {
1721 pr_err("Duplicate MD device names in conf file were found.\n");
1722 return 1;
1723 }
1724 if (devlist == NULL) {
1725 pr_err("No devices listed in conf file were found.\n");
1726 return 1;
1727 }
1728 for (a = array_list; a; a = a->next) {
1729 a->assembled = 0;
1730 if (a->autof == 0)
1731 a->autof = c->autof;
1732 }
1733 if (map_lock(&map))
1734 pr_err("failed to get exclusive lock on mapfile\n");
1735 do {
1736 failures = 0;
1737 successes = 0;
1738 rv = 0;
1739 for (a = array_list; a; a = a->next) {
1740 int r;
1741 if (a->assembled)
1742 continue;
1743 if (a->devname &&
1744 strcasecmp(a->devname, "<ignore>") == 0)
1745 continue;
1746
1747 r = Assemble(ss, a->devname,
1748 a, NULL, c);
1749 if (r == 0) {
1750 a->assembled = 1;
1751 successes++;
1752 } else
1753 failures++;
1754 rv |= r;
1755 cnt++;
1756 }
1757 } while (failures && successes);
1758 if (c->homehost && cnt == 0) {
1759 /* Maybe we can auto-assemble something.
1760 * Repeatedly call Assemble in auto-assemble mode
1761 * until it fails
1762 */
1763 int rv2;
1764 int acnt;
1765 ident->autof = c->autof;
1766 do {
1767 struct mddev_dev *devlist = conf_get_devs();
1768 acnt = 0;
1769 do {
1770 rv2 = Assemble(ss, NULL,
1771 ident,
1772 devlist, c);
1773 if (rv2 == 0) {
1774 cnt++;
1775 acnt++;
1776 }
1777 } while (rv2 != 2);
1778 /* Incase there are stacked devices, we need to go around again */
1779 } while (acnt);
1780 if (cnt == 0 && rv == 0) {
1781 pr_err("No arrays found in config file or automatically\n");
1782 rv = 1;
1783 } else if (cnt)
1784 rv = 0;
1785 } else if (cnt == 0 && rv == 0) {
1786 pr_err("No arrays found in config file\n");
1787 rv = 1;
1788 }
1789 map_unlock(&map);
1790 return rv;
1791 }
1792
1793 static int misc_scan(char devmode, struct context *c)
1794 {
1795 /* apply --detail or --wait-clean to
1796 * all devices in /proc/mdstat
1797 */
1798 struct mdstat_ent *ms = mdstat_read(0, 1);
1799 struct mdstat_ent *e;
1800 struct map_ent *map = NULL;
1801 int members;
1802 int rv = 0;
1803
1804 for (members = 0; members <= 1; members++) {
1805 for (e = ms; e; e = e->next) {
1806 char *name = NULL;
1807 struct map_ent *me;
1808 struct stat stb;
1809 int member = e->metadata_version &&
1810 strncmp(e->metadata_version,
1811 "external:/", 10) == 0;
1812 if (members != member)
1813 continue;
1814 me = map_by_devnm(&map, e->devnm);
1815 if (me && me->path && strcmp(me->path, "/unknown") != 0)
1816 name = me->path;
1817 if (name == NULL || stat(name, &stb) != 0)
1818 name = get_md_name(e->devnm);
1819
1820 if (!name) {
1821 pr_err("cannot find device file for %s\n",
1822 e->devnm);
1823 continue;
1824 }
1825 if (devmode == 'D')
1826 rv |= Detail(name, c);
1827 else
1828 rv |= WaitClean(name, c->verbose);
1829 put_md_name(name);
1830 map_free(map);
1831 map = NULL;
1832 }
1833 }
1834 free_mdstat(ms);
1835 return rv;
1836 }
1837
1838 static int stop_scan(int verbose)
1839 {
1840 /* apply --stop to all devices in /proc/mdstat */
1841 /* Due to possible stacking of devices, repeat until
1842 * nothing more can be stopped
1843 */
1844 int progress = 1, err;
1845 int last = 0;
1846 int rv = 0;
1847 do {
1848 struct mdstat_ent *ms = mdstat_read(0, 0);
1849 struct mdstat_ent *e;
1850
1851 if (!progress) last = 1;
1852 progress = 0; err = 0;
1853 for (e = ms; e; e = e->next) {
1854 char *name = get_md_name(e->devnm);
1855 int mdfd;
1856
1857 if (!name) {
1858 pr_err("cannot find device file for %s\n",
1859 e->devnm);
1860 continue;
1861 }
1862 mdfd = open_mddev(name, 1);
1863 if (mdfd >= 0) {
1864 if (Manage_stop(name, mdfd, verbose, !last))
1865 err = 1;
1866 else
1867 progress = 1;
1868 close(mdfd);
1869 }
1870
1871 put_md_name(name);
1872 }
1873 free_mdstat(ms);
1874 } while (!last && err);
1875 if (err)
1876 rv |= 1;
1877 return rv;
1878 }
1879
1880 static int misc_list(struct mddev_dev *devlist,
1881 struct mddev_ident *ident,
1882 char *dump_directory,
1883 struct supertype *ss, struct context *c)
1884 {
1885 struct mddev_dev *dv;
1886 int rv = 0;
1887
1888 for (dv = devlist; dv; dv = (rv & 16) ? NULL : dv->next) {
1889 int mdfd = -1;
1890
1891 switch(dv->disposition) {
1892 case 'D':
1893 rv |= Detail(dv->devname, c);
1894 continue;
1895 case KillOpt: /* Zero superblock */
1896 if (ss)
1897 rv |= Kill(dv->devname, ss, c->force, c->verbose,0);
1898 else {
1899 int v = c->verbose;
1900 do {
1901 rv |= Kill(dv->devname, NULL, c->force, v, 0);
1902 v = -1;
1903 } while (rv == 0);
1904 rv &= ~4;
1905 }
1906 continue;
1907 case 'Q':
1908 rv |= Query(dv->devname);
1909 continue;
1910 case 'X':
1911 rv |= ExamineBitmap(dv->devname, c->brief, ss);
1912 continue;
1913 case ExamineBB:
1914 rv |= ExamineBadblocks(dv->devname, c->brief, ss);
1915 continue;
1916 case 'W':
1917 case WaitOpt:
1918 rv |= Wait(dv->devname);
1919 continue;
1920 case Waitclean:
1921 rv |= WaitClean(dv->devname, c->verbose);
1922 continue;
1923 case KillSubarray:
1924 rv |= Kill_subarray(dv->devname, c->subarray, c->verbose);
1925 continue;
1926 case UpdateSubarray:
1927 if (!c->update) {
1928 pr_err("-U/--update must be specified with --update-subarray\n");
1929 rv |= 1;
1930 continue;
1931 }
1932 rv |= Update_subarray(dv->devname, c->subarray,
1933 c->update, ident, c->verbose);
1934 continue;
1935 case Dump:
1936 rv |= Dump_metadata(dv->devname, dump_directory, c, ss);
1937 continue;
1938 case Restore:
1939 rv |= Restore_metadata(dv->devname, dump_directory, c, ss,
1940 (dv == devlist && dv->next == NULL));
1941 continue;
1942 case Action:
1943 rv |= SetAction(dv->devname, c->action);
1944 continue;
1945 }
1946
1947 if (dv->devname[0] != '/')
1948 mdfd = open_dev(dv->devname);
1949 if (dv->devname[0] == '/' || mdfd < 0)
1950 mdfd = open_mddev(dv->devname, 1);
1951
1952 if (mdfd >= 0) {
1953 switch(dv->disposition) {
1954 case 'R':
1955 c->runstop = 1;
1956 rv |= Manage_run(dv->devname, mdfd, c);
1957 break;
1958 case 'S':
1959 if (c->scan) {
1960 pr_err("--stop not meaningful with both a --scan assembly and a device name.\n");
1961 rv |= 1;
1962 break;
1963 }
1964 rv |= Manage_stop(dv->devname, mdfd, c->verbose, 0);
1965 break;
1966 case 'o':
1967 rv |= Manage_ro(dv->devname, mdfd, 1);
1968 break;
1969 case 'w':
1970 rv |= Manage_ro(dv->devname, mdfd, -1);
1971 break;
1972 }
1973 close(mdfd);
1974 } else
1975 rv |= 1;
1976 }
1977 return rv;
1978 }
1979
1980 int SetAction(char *dev, char *action)
1981 {
1982 int fd = open(dev, O_RDONLY);
1983 struct mdinfo mdi;
1984 int retval;
1985
1986 if (fd < 0) {
1987 pr_err("Couldn't open %s: %s\n", dev, strerror(errno));
1988 return 1;
1989 }
1990 retval = sysfs_init(&mdi, fd, NULL);
1991 close(fd);
1992 if (retval) {
1993 pr_err("%s is no an md array\n", dev);
1994 return 1;
1995 }
1996
1997 if (sysfs_set_str(&mdi, NULL, "sync_action", action) < 0) {
1998 pr_err("Count not set action for %s to %s: %s\n",
1999 dev, action, strerror(errno));
2000 return 1;
2001 }
2002 return 0;
2003 }
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