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Support auto-assembling of stacked devices
[thirdparty/mdadm.git] / mdadm.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2006 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@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 *
29 * Additions for bitmap and write-behind RAID options, Copyright (C) 2003-2004,
30 * Paul Clements, SteelEye Technology, Inc.
31 */
32
33 #include "mdadm.h"
34 #include "md_p.h"
35 #include <ctype.h>
36
37
38 int main(int argc, char *argv[])
39 {
40 int mode = 0;
41 int opt;
42 int option_index;
43 char *c;
44 int rv;
45 int i;
46
47 int chunk = 0;
48 long long size = -1;
49 int level = UnSet;
50 int layout = UnSet;
51 int raiddisks = 0;
52 int max_disks = MD_SB_DISKS; /* just a default */
53 int sparedisks = 0;
54 struct mddev_ident_s ident;
55 char *configfile = NULL;
56 char *cp;
57 char *update = NULL;
58 int scan = 0;
59 char devmode = 0;
60 int runstop = 0;
61 int readonly = 0;
62 int write_behind = 0;
63 int bitmap_fd = -1;
64 char *bitmap_file = NULL;
65 char *backup_file = NULL;
66 int bitmap_chunk = UnSet;
67 int SparcAdjust = 0;
68 mddev_dev_t devlist = NULL;
69 mddev_dev_t *devlistend = & devlist;
70 mddev_dev_t dv;
71 int devs_found = 0;
72 int verbose = 0;
73 int quiet = 0;
74 int brief = 0;
75 int force = 0;
76 int test = 0;
77 int assume_clean = 0;
78 /* autof indicates whether and how to create device node.
79 * bottom 3 bits are style. Rest (when shifted) are number of parts
80 * 0 - unset
81 * 1 - don't create (no)
82 * 2 - if is_standard, then create (yes)
83 * 3 - create as 'md' - reject is_standard mdp (md)
84 * 4 - create as 'mdp' - reject is_standard md (mdp)
85 * 5 - default to md if not is_standard (md in config file)
86 * 6 - default to mdp if not is_standard (part, or mdp in config file)
87 */
88 int autof = 0;
89
90 char *homehost = NULL;
91 char sys_hostname[256];
92 char *mailaddr = NULL;
93 char *program = NULL;
94 int delay = 0;
95 int daemonise = 0;
96 char *pidfile = NULL;
97 int oneshot = 0;
98 struct supertype *ss = NULL;
99 int writemostly = 0;
100 int re_add = 0;
101 char *shortopt = short_options;
102 int dosyslog = 0;
103
104 int copies;
105 int print_help = 0;
106
107 int mdfd = -1;
108
109 srandom(time(0) ^ getpid());
110
111 ident.uuid_set=0;
112 ident.level = UnSet;
113 ident.raid_disks = UnSet;
114 ident.super_minor= UnSet;
115 ident.devices=0;
116 ident.spare_group = NULL;
117 ident.autof = 0;
118 ident.st = NULL;
119 ident.bitmap_fd = -1;
120 ident.bitmap_file = NULL;
121 ident.name[0] = 0;
122
123 while ((option_index = -1) ,
124 (opt=getopt_long(argc, argv,
125 shortopt, long_options,
126 &option_index)) != -1) {
127 int newmode = mode;
128 /* firstly, some mode-independant options */
129 switch(opt) {
130 case 'h':
131 if (option_index > 0 &&
132 strcmp(long_options[option_index].name, "help-options")==0)
133 print_help = 2;
134 else
135 print_help = 1;
136 continue;
137
138 case 'V':
139 fputs(Version, stderr);
140 exit(0);
141
142 case 'v': verbose++;
143 continue;
144
145 case 'q': quiet++;
146 continue;
147
148 case 'b':
149 if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW)
150 break; /* b means bitmap */
151 brief = 1;
152 if (optarg) {
153 fprintf(stderr, Name ": -b cannot have any extra immediately after it, sorry.\n");
154 exit(2);
155 }
156 continue;
157
158 case HomeHost:
159 homehost = optarg;
160 continue;
161
162 case ':':
163 case '?':
164 fputs(Usage, stderr);
165 exit(2);
166 }
167 /* second, figure out the mode.
168 * Some options force the mode. Others
169 * set the mode if it isn't already
170 */
171
172 switch(opt) {
173 case '@': /* just incase they say --manage */
174 newmode = MANAGE;
175 shortopt = short_bitmap_auto_options;
176 break;
177 case 'a':
178 case 'r':
179 case 'f':
180 case 6: /* re-add */
181 if (!mode) {
182 newmode = MANAGE;
183 shortopt = short_bitmap_auto_options;
184 }
185 break;
186
187 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
188 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
189 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
190 case 'F': newmode = MONITOR;break;
191 case 'G': newmode = GROW; shortopt = short_bitmap_auto_options; break;
192
193 case '#':
194 case 'D':
195 case 'E':
196 case 'X':
197 case 'Q': newmode = MISC; break;
198 case 'R':
199 case 'S':
200 case 'o':
201 case 'w':
202 case 'K': if (!mode) newmode = MISC; break;
203 }
204 if (mode && newmode == mode) {
205 /* everybody happy ! */
206 } else if (mode && newmode != mode) {
207 /* not allowed.. */
208 fprintf(stderr, Name ": ");
209 if (option_index >= 0)
210 fprintf(stderr, "--%s", long_options[option_index].name);
211 else
212 fprintf(stderr, "-%c", opt);
213 fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
214 map_num(modes, newmode),
215 map_num(modes, mode));
216 exit(2);
217 } else if (!mode && newmode) {
218 mode = newmode;
219 } else {
220 /* special case of -c --help */
221 if (opt == 'c' &&
222 ( strncmp(optarg, "--h", 3)==0 ||
223 strncmp(optarg, "-h", 2)==0)) {
224 fputs(Help_config, stderr);
225 exit(0);
226 }
227
228 /* If first option is a device, don't force the mode yet */
229 if (opt == 1) {
230 if (devs_found == 0) {
231 dv = malloc(sizeof(*dv));
232 if (dv == NULL) {
233 fprintf(stderr, Name ": malloc failed\n");
234 exit(3);
235 }
236 dv->devname = optarg;
237 dv->disposition = devmode;
238 dv->writemostly = writemostly;
239 dv->re_add = re_add;
240 dv->used = 0;
241 dv->next = NULL;
242 *devlistend = dv;
243 devlistend = &dv->next;
244
245 devs_found++;
246 continue;
247 }
248 /* No mode yet, and this is the second device ... */
249 fprintf(stderr, Name ": An option must be given to set the mode before a second device is listed\n");
250 exit(2);
251 }
252 if (option_index >= 0)
253 fprintf(stderr, Name ": --%s", long_options[option_index].name);
254 else
255 fprintf(stderr, Name ": -%c", opt);
256 fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
257 exit(2);
258 }
259
260 /* if we just set the mode, then done */
261 switch(opt) {
262 case '@':
263 case '#':
264 case 'A':
265 case 'B':
266 case 'C':
267 case 'F':
268 case 'G':
269 continue;
270 }
271 if (opt == 1) {
272 /* an undecorated option - must be a device name.
273 */
274 if (devs_found > 0 && mode == '@' && !devmode) {
275 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
276 exit(2);
277 }
278 if (devs_found > 0 && mode == 'G' && !devmode) {
279 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
280 exit(2);
281 }
282 dv = malloc(sizeof(*dv));
283 if (dv == NULL) {
284 fprintf(stderr, Name ": malloc failed\n");
285 exit(3);
286 }
287 dv->devname = optarg;
288 dv->disposition = devmode;
289 dv->writemostly = writemostly;
290 dv->re_add = re_add;
291 dv->next = NULL;
292 *devlistend = dv;
293 devlistend = &dv->next;
294
295 devs_found++;
296 continue;
297 }
298
299 /* We've got a mode, and opt is now something else which
300 * could depend on the mode */
301 #define O(a,b) ((a<<8)|b)
302 switch (O(mode,opt)) {
303 case O(CREATE,'c'):
304 case O(BUILD,'c'): /* chunk or rounding */
305 if (chunk) {
306 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
307 "Second value is %s.\n", optarg);
308 exit(2);
309 }
310 chunk = strtol(optarg, &c, 10);
311 if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
312 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
313 optarg);
314 exit(2);
315 }
316 continue;
317
318 case O(CREATE,'e'):
319 case O(ASSEMBLE,'e'):
320 case O(MISC,'e'): /* set metadata (superblock) information */
321 if (ss) {
322 fprintf(stderr, Name ": metadata information already given\n");
323 exit(2);
324 }
325 for(i=0; !ss && superlist[i]; i++)
326 ss = superlist[i]->match_metadata_desc(optarg);
327
328 if (!ss) {
329 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
330 exit(2);
331 }
332 max_disks = ss->max_devs;
333 continue;
334
335 case O(MANAGE,'W'):
336 case O(BUILD,'W'):
337 case O(CREATE,'W'):
338 /* set write-mostly for following devices */
339 writemostly = 1;
340 continue;
341
342 case O(GROW,'z'):
343 case O(CREATE,'z'): /* size */
344 if (size >= 0) {
345 fprintf(stderr, Name ": size may only be specified once. "
346 "Second value is %s.\n", optarg);
347 exit(2);
348 }
349 if (strcmp(optarg, "max")==0)
350 size = 0;
351 else {
352 size = strtoll(optarg, &c, 10);
353 if (!optarg[0] || *c || size < 4) {
354 fprintf(stderr, Name ": invalid size: %s\n",
355 optarg);
356 exit(2);
357 }
358 }
359 continue;
360
361 case O(GROW,'l'): /* hack - needed to understand layout */
362 case O(CREATE,'l'):
363 case O(BUILD,'l'): /* set raid level*/
364 if (level != UnSet) {
365 fprintf(stderr, Name ": raid level may only be set once. "
366 "Second value is %s.\n", optarg);
367 exit(2);
368 }
369 level = map_name(pers, optarg);
370 if (level == UnSet) {
371 fprintf(stderr, Name ": invalid raid level: %s\n",
372 optarg);
373 exit(2);
374 }
375 if (level != 0 && level != -1 && level != 1 && level != -4 && level != -5 && mode == BUILD) {
376 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
377 optarg);
378 exit(2);
379 }
380 if (sparedisks > 0 && level < 1 && level >= -1) {
381 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
382 optarg);
383 exit(2);
384 }
385 ident.level = level;
386 continue;
387
388 case O(CREATE,'p'): /* raid5 layout */
389 case O(BUILD,'p'): /* faulty layout */
390 case O(GROW, 'p'): /* faulty reconfig */
391 if (layout != UnSet) {
392 fprintf(stderr,Name ": layout may only be sent once. "
393 "Second value was %s\n", optarg);
394 exit(2);
395 }
396 switch(level) {
397 default:
398 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
399 map_num(pers, level));
400 exit(2);
401 case UnSet:
402 fprintf(stderr, Name ": raid level must be given before layout.\n");
403 exit(2);
404
405 case 5:
406 case 6:
407 layout = map_name(r5layout, optarg);
408 if (layout==UnSet) {
409 fprintf(stderr, Name ": layout %s not understood for raid5.\n",
410 optarg);
411 exit(2);
412 }
413 break;
414
415 case 10:
416 /* 'f', 'o' or 'n' followed by a number <= raid_disks */
417 if ((optarg[0] != 'n' && optarg[0] != 'f' && optarg[0] != 'o') ||
418 (copies = strtoul(optarg+1, &cp, 10)) < 1 ||
419 copies > 200 ||
420 *cp) {
421 fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
422 exit(2);
423 }
424 if (optarg[0] == 'n')
425 layout = 256 + copies;
426 else if (optarg[0] == 'o')
427 layout = 0x10000 + (copies<<8) + 1;
428 else
429 layout = 1 + (copies<<8);
430 break;
431 case -5: /* Faulty
432 * modeNNN
433 */
434
435 {
436 int ln = strcspn(optarg, "0123456789");
437 char *m = strdup(optarg);
438 int mode;
439 m[ln] = 0;
440 mode = map_name(faultylayout, m);
441 if (mode == UnSet) {
442 fprintf(stderr, Name ": layout %s not understood for faulty.\n",
443 optarg);
444 exit(2);
445 }
446 layout = mode | (atoi(optarg+ln)<< ModeShift);
447 }
448 }
449 continue;
450
451 case O(CREATE,AssumeClean):
452 case O(BUILD,AssumeClean): /* assume clean */
453 assume_clean = 1;
454 continue;
455
456 case O(GROW,'n'):
457 case O(CREATE,'n'):
458 case O(BUILD,'n'): /* number of raid disks */
459 if (raiddisks) {
460 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
461 raiddisks, optarg);
462 exit(2);
463 }
464 raiddisks = strtol(optarg, &c, 10);
465 if (!optarg[0] || *c || raiddisks<=0) {
466 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
467 optarg);
468 exit(2);
469 }
470 ident.raid_disks = raiddisks;
471 continue;
472
473 case O(CREATE,'x'): /* number of spare (eXtra) discs */
474 if (sparedisks) {
475 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
476 sparedisks, optarg);
477 exit(2);
478 }
479 if (level != UnSet && level <= 0 && level >= -1) {
480 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
481 level);
482 exit(2);
483 }
484 sparedisks = strtol(optarg, &c, 10);
485 if (!optarg[0] || *c || sparedisks < 0) {
486 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
487 optarg);
488 exit(2);
489 }
490 continue;
491
492 case O(CREATE,'a'):
493 case O(BUILD,'a'):
494 case O(ASSEMBLE,'a'): /* auto-creation of device node */
495 autof = parse_auto(optarg, "--auto flag", 0);
496 continue;
497
498 case O(BUILD,'f'): /* force honouring '-n 1' */
499 case O(GROW,'f'): /* ditto */
500 case O(CREATE,'f'): /* force honouring of device list */
501 case O(ASSEMBLE,'f'): /* force assembly */
502 case O(MISC,'f'): /* force zero */
503 force=1;
504 continue;
505
506 /* now for the Assemble options */
507 case O(ASSEMBLE,'u'): /* uuid of array */
508 if (ident.uuid_set) {
509 fprintf(stderr, Name ": uuid cannot be set twice. "
510 "Second value %s.\n", optarg);
511 exit(2);
512 }
513 if (parse_uuid(optarg, ident.uuid))
514 ident.uuid_set = 1;
515 else {
516 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
517 exit(2);
518 }
519 continue;
520
521 case O(CREATE,'N'):
522 case O(ASSEMBLE,'N'):
523 if (ident.name[0]) {
524 fprintf(stderr, Name ": name cannot be set twice. "
525 "Second value %s.\n", optarg);
526 exit(2);
527 }
528 if (strlen(optarg) > 32) {
529 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
530 optarg);
531 exit(2);
532 }
533 strcpy(ident.name, optarg);
534 continue;
535
536 case O(ASSEMBLE,'m'): /* super-minor for array */
537 if (ident.super_minor != UnSet) {
538 fprintf(stderr, Name ": super-minor cannot be set twice. "
539 "Second value: %s.\n", optarg);
540 exit(2);
541 }
542 if (strcmp(optarg, "dev")==0)
543 ident.super_minor = -2;
544 else {
545 ident.super_minor = strtoul(optarg, &cp, 10);
546 if (!optarg[0] || *cp) {
547 fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
548 exit(2);
549 }
550 }
551 continue;
552
553 case O(ASSEMBLE,'U'): /* update the superblock */
554 if (update) {
555 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
556 update, optarg);
557 exit(2);
558 }
559 update = optarg;
560 if (strcmp(update, "sparc2.2")==0)
561 continue;
562 if (strcmp(update, "super-minor") == 0)
563 continue;
564 if (strcmp(update, "summaries")==0)
565 continue;
566 if (strcmp(update, "resync")==0)
567 continue;
568 if (strcmp(update, "uuid")==0)
569 continue;
570 if (strcmp(update, "name")==0)
571 continue;
572 if (strcmp(update, "homehost")==0)
573 continue;
574 if (strcmp(update, "byteorder")==0) {
575 if (ss) {
576 fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
577 exit(2);
578 }
579 for(i=0; !ss && superlist[i]; i++)
580 ss = superlist[i]->match_metadata_desc("0.swap");
581 if (!ss) {
582 fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
583 exit(2);
584 }
585
586 continue;
587 }
588 fprintf(stderr, Name ": '--update %s' invalid. Only 'sparc2.2', 'super-minor', 'uuid', 'resync' or 'summaries' supported\n",update);
589 exit(2);
590
591 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
592 runstop = -1; /* --stop isn't allowed for --assemble, so we overload slightly */
593 continue;
594
595 case O(ASSEMBLE,'c'): /* config file */
596 case O(MISC, 'c'):
597 case O(MONITOR,'c'):
598 if (configfile) {
599 fprintf(stderr, Name ": configfile cannot be set twice. "
600 "Second value is %s.\n", optarg);
601 exit(2);
602 }
603 configfile = optarg;
604 /* FIXME possibly check that config file exists. Even parse it */
605 continue;
606 case O(ASSEMBLE,'s'): /* scan */
607 case O(MISC,'s'):
608 case O(MONITOR,'s'):
609 scan = 1;
610 continue;
611
612 case O(MONITOR,'m'): /* mail address */
613 if (mailaddr)
614 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
615 optarg);
616 else
617 mailaddr = optarg;
618 continue;
619
620 case O(MONITOR,'p'): /* alert program */
621 if (program)
622 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
623 optarg);
624 else
625 program = optarg;
626 continue;
627
628 case O(MONITOR,'d'): /* delay in seconds */
629 case O(GROW, 'd'):
630 case O(BUILD,'d'): /* delay for bitmap updates */
631 case O(CREATE,'d'):
632 if (delay)
633 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
634 optarg);
635 else {
636 delay = strtol(optarg, &c, 10);
637 if (!optarg[0] || *c || delay<1) {
638 fprintf(stderr, Name ": invalid delay: %s\n",
639 optarg);
640 exit(2);
641 }
642 }
643 continue;
644 case O(MONITOR,'f'): /* daemonise */
645 daemonise = 1;
646 continue;
647 case O(MONITOR,'i'): /* pid */
648 if (pidfile)
649 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
650 optarg);
651 else
652 pidfile = optarg;
653 continue;
654 case O(MONITOR,'1'): /* oneshot */
655 oneshot = 1;
656 continue;
657 case O(MONITOR,'t'): /* test */
658 test = 1;
659 continue;
660 case O(MONITOR,'y'): /* log messages to syslog */
661 openlog("mdadm", 0, SYSLOG_FACILITY);
662 dosyslog = 1;
663 continue;
664
665 /* now the general management options. Some are applicable
666 * to other modes. None have arguments.
667 */
668 case O(GROW,'a'):
669 case O(MANAGE,'a'): /* add a drive */
670 devmode = 'a';
671 re_add = 0;
672 continue;
673 case O(MANAGE,ReAdd):
674 devmode = 'a';
675 re_add = 1;
676 continue;
677 case O(MANAGE,'r'): /* remove a drive */
678 devmode = 'r';
679 continue;
680 case O(MANAGE,'f'): /* set faulty */
681 devmode = 'f';
682 continue;
683 case O(MANAGE,'R'):
684 case O(ASSEMBLE,'R'):
685 case O(BUILD,'R'):
686 case O(CREATE,'R'): /* Run the array */
687 if (runstop < 0) {
688 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
689 exit(2);
690 }
691 runstop = 1;
692 continue;
693 case O(MANAGE,'S'):
694 if (runstop > 0) {
695 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
696 exit(2);
697 }
698 runstop = -1;
699 continue;
700
701 case O(MANAGE,'o'):
702 if (readonly < 0) {
703 fprintf(stderr, Name ": Cannot have both readonly and readwrite\n");
704 exit(2);
705 }
706 readonly = 1;
707 continue;
708 case O(MANAGE,'w'):
709 if (readonly > 0) {
710 fprintf(stderr, Name ": Cannot have both readwrite and readonly.\n");
711 exit(2);
712 }
713 readonly = -1;
714 continue;
715
716 case O(MISC,'Q'):
717 case O(MISC,'D'):
718 case O(MISC,'E'):
719 case O(MISC,'K'):
720 case O(MISC,'R'):
721 case O(MISC,'S'):
722 case O(MISC,'X'):
723 case O(MISC,'o'):
724 case O(MISC,'w'):
725 if (devmode && devmode != opt &&
726 (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
727 fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
728 devmode =='E'?opt:devmode);
729 exit(2);
730 }
731 devmode = opt;
732 continue;
733 case O(MISC,'t'):
734 test = 1;
735 continue;
736
737 case O(MISC, Sparc22):
738 if (devmode != 'E') {
739 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
740 exit(2);
741 }
742 SparcAdjust = 1;
743 continue;
744
745 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
746 if (!optarg) {
747 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
748 exit(2);
749 }
750 if (strcmp(optarg, "internal")==0) {
751 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
752 continue;
753 }
754 bitmap_fd = open(optarg, O_RDWR);
755 if (!*optarg || bitmap_fd < 0) {
756 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
757 exit(2);
758 }
759 ident.bitmap_fd = bitmap_fd; /* for Assemble */
760 continue;
761
762 case O(ASSEMBLE, BackupFile):
763 case O(GROW, BackupFile):
764 /* Specify a file into which grow might place a backup,
765 * or from which assemble might recover a backup
766 */
767 if (backup_file) {
768 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
769 exit(2);
770 }
771 backup_file = optarg;
772 continue;
773
774 case O(GROW,'b'):
775 case O(BUILD,'b'):
776 case O(CREATE,'b'): /* here we create the bitmap */
777 if (strcmp(optarg, "internal")== 0 ||
778 strcmp(optarg, "none")== 0 ||
779 strchr(optarg, '/') != NULL) {
780 bitmap_file = optarg;
781 continue;
782 }
783 /* probable typo */
784 fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n");
785 exit(2);
786
787 case O(GROW,BitmapChunk):
788 case O(BUILD,BitmapChunk):
789 case O(CREATE,BitmapChunk): /* bitmap chunksize */
790 bitmap_chunk = strtol(optarg, &c, 10);
791 if (!optarg[0] || *c || bitmap_chunk < 0 ||
792 bitmap_chunk & (bitmap_chunk - 1)) {
793 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
794 optarg);
795 exit(2);
796 }
797 /* convert K to B, chunk of 0K means 512B */
798 bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
799 continue;
800
801 case O(BUILD, WriteBehind):
802 case O(CREATE, WriteBehind): /* write-behind mode */
803 write_behind = DEFAULT_MAX_WRITE_BEHIND;
804 if (optarg) {
805 write_behind = strtol(optarg, &c, 10);
806 if (write_behind < 0 || *c ||
807 write_behind > 16383) {
808 fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
809 exit(2);
810 }
811 }
812 continue;
813 }
814 /* We have now processed all the valid options. Anything else is
815 * an error
816 */
817 if (option_index > 0)
818 fprintf(stderr, Name ":option --%s not valid in %s mode\n",
819 long_options[option_index].name,
820 map_num(modes, mode));
821 else
822 fprintf(stderr, Name ": option -%c not valid in %s mode\n",
823 opt, map_num(modes, mode));
824 exit(2);
825
826 }
827
828 if (print_help) {
829 char *help_text = Help;
830 if (print_help == 2)
831 help_text = OptionHelp;
832 else
833 switch (mode) {
834 case ASSEMBLE : help_text = Help_assemble; break;
835 case BUILD : help_text = Help_build; break;
836 case CREATE : help_text = Help_create; break;
837 case MANAGE : help_text = Help_manage; break;
838 case MISC : help_text = Help_misc; break;
839 case MONITOR : help_text = Help_monitor; break;
840 case GROW : help_text = Help_grow; break;
841 }
842 fputs(help_text,stderr);
843 exit(0);
844 }
845
846 if (!mode && devs_found) {
847 mode = MISC;
848 devmode = 'Q';
849 if (devlist->disposition == 0)
850 devlist->disposition = devmode;
851 }
852 if (!mode) {
853 fputs(Usage, stderr);
854 exit(2);
855 }
856 /* Ok, got the option parsing out of the way
857 * hopefully it's mostly right but there might be some stuff
858 * missing
859 *
860 * That is mosty checked in the per-mode stuff but...
861 *
862 * For @,B,C and A without -s, the first device listed must be an md device
863 * we check that here and open it.
864 */
865
866 if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
867 (mode == ASSEMBLE && ! scan)) {
868 if (devs_found < 1) {
869 fprintf(stderr, Name ": an md device must be given in this mode\n");
870 exit(2);
871 }
872 if ((int)ident.super_minor == -2 && autof) {
873 fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
874 exit(2);
875 }
876 if (mode == MANAGE && runstop < 0)
877 autof=1; /* Don't create */
878 mdfd = open_mddev(devlist->devname, autof);
879 if (mdfd < 0)
880 exit(1);
881 if ((int)ident.super_minor == -2) {
882 struct stat stb;
883 fstat(mdfd, &stb);
884 ident.super_minor = minor(stb.st_rdev);
885 }
886 }
887
888 if (raiddisks) {
889 if (raiddisks > max_disks) {
890 fprintf(stderr, Name ": invalid number of raid devices: %d\n",
891 raiddisks);
892 exit(2);
893 }
894 if (raiddisks == 1 && !force && level != -5) {
895 fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
896 " a mistake. If you really mean it you will need to specify --force before\n"
897 " setting the number of drives.\n");
898 exit(2);
899 }
900 }
901 if (sparedisks) {
902 if ( sparedisks > max_disks - raiddisks) {
903 fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
904 sparedisks);
905 exit(2);
906 }
907 }
908
909 if (homehost == NULL)
910 homehost = conf_get_homehost(configfile);
911 if (homehost && strcmp(homehost, "<system>")==0) {
912 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
913 sys_hostname[sizeof(sys_hostname)-1] = 0;
914 homehost = sys_hostname;
915 }
916 }
917
918 rv = 0;
919 switch(mode) {
920 case MANAGE:
921 /* readonly, add/remove, readwrite, runstop */
922 if (readonly>0)
923 rv = Manage_ro(devlist->devname, mdfd, readonly);
924 if (!rv && devs_found>1)
925 rv = Manage_subdevs(devlist->devname, mdfd,
926 devlist->next, verbose-quiet);
927 if (!rv && readonly < 0)
928 rv = Manage_ro(devlist->devname, mdfd, readonly);
929 if (!rv && runstop)
930 rv = Manage_runstop(devlist->devname, mdfd, runstop, 0);
931 break;
932 case ASSEMBLE:
933 if (devs_found == 1 && ident.uuid_set == 0 &&
934 ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
935 /* Only a device has been given, so get details from config file */
936 mddev_ident_t array_ident = conf_get_ident(configfile, devlist->devname);
937 if (array_ident == NULL) {
938 fprintf(stderr, Name ": %s not identified in config file.\n",
939 devlist->devname);
940 rv |= 1;
941 } else {
942 mdfd = open_mddev(devlist->devname,
943 array_ident->autof ? array_ident->autof : autof);
944 if (mdfd < 0)
945 rv |= 1;
946 else {
947 rv |= Assemble(ss, devlist->devname, mdfd, array_ident, configfile,
948 NULL, backup_file,
949 readonly, runstop, update, homehost, verbose-quiet, force);
950 close(mdfd);
951 }
952 }
953 } else if (!scan)
954 rv = Assemble(ss, devlist->devname, mdfd, &ident, configfile,
955 devlist->next, backup_file,
956 readonly, runstop, update, homehost, verbose-quiet, force);
957 else if (devs_found>0) {
958 if (update && devs_found > 1) {
959 fprintf(stderr, Name ": can only update a single array at a time\n");
960 exit(1);
961 }
962 if (backup_file && devs_found > 1) {
963 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
964 exit(1);
965 }
966 for (dv = devlist ; dv ; dv=dv->next) {
967 mddev_ident_t array_ident = conf_get_ident(configfile, dv->devname);
968 if (array_ident == NULL) {
969 fprintf(stderr, Name ": %s not identified in config file.\n",
970 dv->devname);
971 rv |= 1;
972 continue;
973 }
974 mdfd = open_mddev(dv->devname,
975 array_ident->autof ?array_ident->autof : autof);
976 if (mdfd < 0) {
977 rv |= 1;
978 continue;
979 }
980 rv |= Assemble(ss, dv->devname, mdfd, array_ident, configfile,
981 NULL, backup_file,
982 readonly, runstop, update, homehost, verbose-quiet, force);
983 close(mdfd);
984 }
985 } else {
986 mddev_ident_t array_list = conf_get_ident(configfile, NULL);
987 mddev_dev_t devlist = conf_get_devs(configfile);
988 int cnt = 0;
989 if (devlist == NULL) {
990 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
991 exit(1);
992 }
993 if (update) {
994 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
995 exit(1);
996 }
997 if (backup_file) {
998 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
999 exit(1);
1000 }
1001 for (; array_list; array_list = array_list->next) {
1002 mdu_array_info_t array;
1003 mdfd = open_mddev(array_list->devname,
1004 array_list->autof ? array_list->autof : autof);
1005 if (mdfd < 0) {
1006 rv |= 1;
1007 continue;
1008 }
1009 if (ioctl(mdfd, GET_ARRAY_INFO, &array)>=0)
1010 /* already assembled, skip */
1011 ;
1012 else {
1013 rv |= Assemble(ss, array_list->devname, mdfd,
1014 array_list, configfile,
1015 devlist, NULL,
1016 readonly, runstop, NULL, homehost, verbose-quiet, force);
1017 if (rv == 0) cnt++;
1018 }
1019 close(mdfd);
1020 }
1021 if (homehost) {
1022 /* Maybe we can auto-assemble something.
1023 * Repeatedly call Assemble in auto-assmble mode
1024 * until it fails
1025 */
1026 int rv2;
1027 int acnt;
1028 ident.autof = autof;
1029 do {
1030 acnt = 0;
1031 do {
1032 rv2 = Assemble(ss, NULL, -1,
1033 &ident, configfile,
1034 devlist, NULL,
1035 readonly, runstop, NULL, homehost, verbose-quiet, force);
1036 if (rv2==0) {
1037 cnt++;
1038 acnt++;
1039 }
1040 } while (rv2!=2);
1041 /* Incase there are stacked devices, we need to go around again */
1042 devlist = conf_get_devs(configfile);
1043 } while (acnt);
1044 if (cnt == 0 && rv == 0) {
1045 fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1046 rv = 1;
1047 }
1048 } else if (cnt == 0 && rv == 0) {
1049 fprintf(stderr, Name ": No arrays found in config file\n");
1050 rv = 1;
1051 }
1052 }
1053 break;
1054 case BUILD:
1055 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1056 if (write_behind && !bitmap_file) {
1057 fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1058 rv = 1;
1059 break;
1060 }
1061
1062 if (bitmap_file) {
1063 if (strcmp(bitmap_file, "internal")==0) {
1064 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1065 rv |= 1;
1066 break;
1067 }
1068 }
1069 rv = Build(devlist->devname, mdfd, chunk, level, layout,
1070 raiddisks, devlist->next, assume_clean,
1071 bitmap_file, bitmap_chunk, write_behind, delay, verbose-quiet);
1072 break;
1073 case CREATE:
1074 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1075 if (write_behind && !bitmap_file) {
1076 fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1077 rv = 1;
1078 break;
1079 }
1080
1081 rv = Create(ss, devlist->devname, mdfd, chunk, level, layout, size<0 ? 0 : size,
1082 raiddisks, sparedisks, ident.name, homehost,
1083 devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1084 bitmap_file, bitmap_chunk, write_behind, delay);
1085 break;
1086 case MISC:
1087
1088 if (devmode == 'E') {
1089 if (devlist == NULL && !scan) {
1090 fprintf(stderr, Name ": No devices to examine\n");
1091 exit(2);
1092 }
1093 if (devlist == NULL)
1094 devlist = conf_get_devs(configfile);
1095 if (devlist == NULL) {
1096 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1097 exit(1);
1098 }
1099 rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief, scan, SparcAdjust, ss, homehost);
1100 } else {
1101 if (devlist == NULL) {
1102 if (devmode=='D' && scan) {
1103 /* apply --detail to all devices in /proc/mdstat */
1104 struct mdstat_ent *ms = mdstat_read(0, 1);
1105 struct mdstat_ent *e;
1106 for (e=ms ; e ; e=e->next) {
1107 char *name = get_md_name(e->devnum);
1108
1109 if (!name) {
1110 fprintf(stderr, Name ": cannot find device file for %s\n",
1111 e->dev);
1112 continue;
1113 }
1114 rv |= Detail(name, verbose>1?0:verbose+1, test, homehost);
1115 put_md_name(name);
1116 }
1117 } else if (devmode == 'S' && scan) {
1118 /* apply --stop to all devices in /proc/mdstat */
1119 /* Due to possible stacking of devices, repeat until
1120 * nothing more can be stopped
1121 */
1122 int progress=1, err;
1123 int last = 0;
1124 do {
1125 struct mdstat_ent *ms = mdstat_read(0, 0);
1126 struct mdstat_ent *e;
1127
1128 if (!progress) last = 1;
1129 progress = 0; err = 0;
1130 for (e=ms ; e ; e=e->next) {
1131 char *name = get_md_name(e->devnum);
1132
1133 if (!name) {
1134 fprintf(stderr, Name ": cannot find device file for %s\n",
1135 e->dev);
1136 continue;
1137 }
1138 mdfd = open_mddev(name, 1);
1139 if (mdfd >= 0) {
1140 if (Manage_runstop(name, mdfd, -1, !last))
1141 err = 1;
1142 else
1143 progress = 1;
1144 close(mdfd);
1145 }
1146
1147 put_md_name(name);
1148 }
1149 } while (!last && err);
1150 if (err) rv |= 1;
1151 } else {
1152 fprintf(stderr, Name ": No devices given.\n");
1153 exit(2);
1154 }
1155 }
1156 for (dv=devlist ; dv; dv=dv->next) {
1157 switch(dv->disposition) {
1158 case 'D':
1159 rv |= Detail(dv->devname, brief?1+verbose:0, test, homehost); continue;
1160 case 'K': /* Zero superblock */
1161 rv |= Kill(dv->devname, force, quiet); continue;
1162 case 'Q':
1163 rv |= Query(dv->devname); continue;
1164 case 'X':
1165 rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1166 }
1167 mdfd = open_mddev(dv->devname, 1);
1168 if (mdfd>=0) {
1169 switch(dv->disposition) {
1170 case 'R':
1171 rv |= Manage_runstop(dv->devname, mdfd, 1, 0); break;
1172 case 'S':
1173 rv |= Manage_runstop(dv->devname, mdfd, -1, 0); break;
1174 case 'o':
1175 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1176 case 'w':
1177 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1178 }
1179 close(mdfd);
1180 } else
1181 rv |= 1;
1182 }
1183 }
1184 break;
1185 case MONITOR:
1186 if (!devlist && !scan) {
1187 fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1188 rv = 1;
1189 break;
1190 }
1191 if (pidfile && !daemonise) {
1192 fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1193 rv = 1;
1194 break;
1195 }
1196 rv= Monitor(devlist, mailaddr, program,
1197 delay?delay:60, daemonise, scan, oneshot,
1198 dosyslog, configfile, test, pidfile);
1199 break;
1200
1201 case GROW:
1202 if (devs_found > 1) {
1203
1204 /* must be '-a'. */
1205 if (size >= 0 || raiddisks) {
1206 fprintf(stderr, Name ": --size, --raiddisks, and --add are exclusing in --grow mode\n");
1207 rv = 1;
1208 break;
1209 }
1210 for (dv=devlist->next; dv ; dv=dv->next) {
1211 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1212 if (rv)
1213 break;
1214 }
1215 } else if ((size >= 0) + (raiddisks != 0) + (layout != UnSet) + (bitmap_file != NULL)> 1) {
1216 fprintf(stderr, Name ": can change at most one of size, raiddisks, bitmap, and layout\n");
1217 rv = 1;
1218 break;
1219 } else if (layout != UnSet)
1220 rv = Manage_reconfig(devlist->devname, mdfd, layout);
1221 else if (size >= 0 || raiddisks)
1222 rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1223 size, level, layout, chunk, raiddisks);
1224 else if (bitmap_file) {
1225 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1226 rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1227 bitmap_chunk, delay, write_behind, force);
1228 } else
1229 fprintf(stderr, Name ": no changes to --grow\n");
1230 break;
1231 }
1232 exit(rv);
1233 }
Unnamed repository; edit this file 'description' to name the repository.