main: factor out code to parse layout for raid10 and faulty.
[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         long long array_size = -1;
50         int level = UnSet;
51         int layout = UnSet;
52         int raiddisks = 0;
53         int max_disks = MD_SB_DISKS; /* just a default */
54         int sparedisks = 0;
55         struct mddev_ident_s ident;
56         char *configfile = NULL;
57         char *cp;
58         char *update = NULL;
59         int scan = 0;
60         char devmode = 0;
61         int runstop = 0;
62         int readonly = 0;
63         int write_behind = 0;
64         int bitmap_fd = -1;
65         char *bitmap_file = NULL;
66         char *backup_file = NULL;
67         int bitmap_chunk = UnSet;
68         int SparcAdjust = 0;
69         mddev_dev_t devlist = NULL;
70         mddev_dev_t *devlistend = & devlist;
71         mddev_dev_t dv;
72         int devs_found = 0;
73         int verbose = 0;
74         int quiet = 0;
75         int brief = 0;
76         int force = 0;
77         int test = 0;
78         int export = 0;
79         int assume_clean = 0;
80         char *symlinks = NULL;
81         /* autof indicates whether and how to create device node.
82          * bottom 3 bits are style.  Rest (when shifted) are number of parts
83          * 0  - unset
84          * 1  - don't create (no)
85          * 2  - if is_standard, then create (yes)
86          * 3  - create as 'md' - reject is_standard mdp (md)
87          * 4  - create as 'mdp' - reject is_standard md (mdp)
88          * 5  - default to md if not is_standard (md in config file)
89          * 6  - default to mdp if not is_standard (part, or mdp in config file)
90          */
91         int autof = 0;
92
93         char *homehost = NULL;
94         char sys_hostname[256];
95         int require_homehost = 1;
96         char *mailaddr = NULL;
97         char *program = NULL;
98         int delay = 0;
99         int daemonise = 0;
100         char *pidfile = NULL;
101         int oneshot = 0;
102         struct supertype *ss = NULL;
103         int writemostly = 0;
104         int re_add = 0;
105         char *shortopt = short_options;
106         int dosyslog = 0;
107         int rebuild_map = 0;
108         int auto_update_home = 0;
109
110         int print_help = 0;
111         FILE *outf;
112
113         int mdfd = -1;
114
115         srandom(time(0) ^ getpid());
116
117         ident.uuid_set=0;
118         ident.level = UnSet;
119         ident.raid_disks = UnSet;
120         ident.super_minor= UnSet;
121         ident.devices=0;
122         ident.spare_group = NULL;
123         ident.autof = 0;
124         ident.st = NULL;
125         ident.bitmap_fd = -1;
126         ident.bitmap_file = NULL;
127         ident.name[0] = 0;
128         ident.container = NULL;
129         ident.member = NULL;
130
131         while ((option_index = -1) ,
132                (opt=getopt_long(argc, argv,
133                                 shortopt, long_options,
134                                 &option_index)) != -1) {
135                 int newmode = mode;
136                 /* firstly, some mode-independent options */
137                 switch(opt) {
138                 case 'h':
139                         if (option_index > 0 &&
140                             strcmp(long_options[option_index].name, "help-options")==0)
141                                 print_help = 2;
142                         else
143                                 print_help = 1;
144                         continue;
145
146                 case 'V':
147                         fputs(Version, stderr);
148                         exit(0);
149
150                 case 'v': verbose++;
151                         continue;
152
153                 case 'q': quiet++;
154                         continue;
155
156                 case 'b':
157                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW)
158                                 break; /* b means bitmap */
159                         brief = 1;
160                         if (optarg) {
161                                 fprintf(stderr, Name ": -b cannot have any extra immediately after it, sorry.\n");
162                                 exit(2);
163                         }
164                         continue;
165
166                 case 'Y': export++;
167                         continue;
168
169                 case HomeHost:
170                         if (strcasecmp(optarg, "<ignore>") == 0)
171                                 require_homehost = 0;
172                         else
173                                 homehost = optarg;
174                         continue;
175
176                 case ':':
177                 case '?':
178                         fputs(Usage, stderr);
179                         exit(2);
180                 }
181                 /* second, figure out the mode.
182                  * Some options force the mode.  Others
183                  * set the mode if it isn't already
184                  */
185
186                 switch(opt) {
187                 case '@': /* just incase they say --manage */
188                         newmode = MANAGE;
189                         shortopt = short_bitmap_options;
190                         break;
191                 case 'a':
192                 case 'r':
193                 case 'f':
194                 case ReAdd: /* re-add */
195                         if (!mode) {
196                                 newmode = MANAGE;
197                                 shortopt = short_bitmap_options;
198                         }
199                         break;
200
201                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
202                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
203                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
204                 case 'F': newmode = MONITOR;break;
205                 case 'G': newmode = GROW;
206                         shortopt = short_bitmap_options;
207                         break;
208                 case 'I': newmode = INCREMENTAL;
209                         shortopt = short_bitmap_auto_options; break;
210                 case AutoDetect:
211                         newmode = AUTODETECT; break;
212
213                 case '#':
214                 case 'D':
215                 case 'E':
216                 case 'X':
217                 case 'Q': newmode = MISC; break;
218                 case 'R':
219                 case 'S':
220                 case 'o':
221                 case 'w':
222                 case 'W':
223                 case Waitclean:
224                 case DetailPlatform:
225                 case 'K': if (!mode) newmode = MISC; break;
226                 }
227                 if (mode && newmode == mode) {
228                         /* everybody happy ! */
229                 } else if (mode && newmode != mode) {
230                         /* not allowed.. */
231                         fprintf(stderr, Name ": ");
232                         if (option_index >= 0)
233                                 fprintf(stderr, "--%s", long_options[option_index].name);
234                         else
235                                 fprintf(stderr, "-%c", opt);
236                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
237                                 map_num(modes, newmode),
238                                 map_num(modes, mode));
239                         exit(2);
240                 } else if (!mode && newmode) {
241                         mode = newmode;
242                 } else {
243                         /* special case of -c --help */
244                         if (opt == 'c' &&
245                             ( strncmp(optarg, "--h", 3)==0 ||
246                               strncmp(optarg, "-h", 2)==0)) {
247                                 fputs(Help_config, stdout);
248                                 exit(0);
249                         }
250
251                         /* If first option is a device, don't force the mode yet */
252                         if (opt == 1) {
253                                 if (devs_found == 0) {
254                                         dv = malloc(sizeof(*dv));
255                                         if (dv == NULL) {
256                                                 fprintf(stderr, Name ": malloc failed\n");
257                                                 exit(3);
258                                         }
259                                         dv->devname = optarg;
260                                         dv->disposition = devmode;
261                                         dv->writemostly = writemostly;
262                                         dv->re_add = re_add;
263                                         dv->used = 0;
264                                         dv->content = NULL;
265                                         dv->next = NULL;
266                                         *devlistend = dv;
267                                         devlistend = &dv->next;
268
269                                         devs_found++;
270                                         continue;
271                                 }
272                                 /* No mode yet, and this is the second device ... */
273                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device is listed\n");
274                                 exit(2);
275                         }
276                         if (option_index >= 0)
277                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
278                         else
279                                 fprintf(stderr, Name ": -%c", opt);
280                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
281                         exit(2);
282                 }
283
284                 /* if we just set the mode, then done */
285                 switch(opt) {
286                 case '@':
287                 case '#':
288                 case 'A':
289                 case 'B':
290                 case 'C':
291                 case 'F':
292                 case 'G':
293                 case 'I':
294                 case AutoDetect:
295                         continue;
296                 }
297                 if (opt == 1) {
298                         /* an undecorated option - must be a device name.
299                          */
300                         if (devs_found > 0 && mode == '@' && !devmode) {
301                                 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
302                                 exit(2);
303                         }
304                         if (devs_found > 0 && mode == 'G' && !devmode) {
305                                 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
306                                 exit(2);
307                         }
308                         dv = malloc(sizeof(*dv));
309                         if (dv == NULL) {
310                                 fprintf(stderr, Name ": malloc failed\n");
311                                 exit(3);
312                         }
313                         dv->devname = optarg;
314                         dv->disposition = devmode;
315                         dv->writemostly = writemostly;
316                         dv->re_add = re_add;
317                         dv->used = 0;
318                         dv->content = NULL;
319                         dv->next = NULL;
320                         *devlistend = dv;
321                         devlistend = &dv->next;
322
323                         devs_found++;
324                         continue;
325                 }
326
327                 /* We've got a mode, and opt is now something else which
328                  * could depend on the mode */
329 #define O(a,b) ((a<<8)|b)
330                 switch (O(mode,opt)) {
331                 case O(CREATE,'c'):
332                 case O(BUILD,'c'): /* chunk or rounding */
333                         if (chunk) {
334                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
335                                         "Second value is %s.\n", optarg);
336                                 exit(2);
337                         }
338                         chunk = strtol(optarg, &c, 10);
339                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
340                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
341                                         optarg);
342                                 exit(2);
343                         }
344                         continue;
345
346                 case O(ASSEMBLE,AutoHomeHost):
347                         auto_update_home = 1;
348                         continue;
349                 case O(INCREMENTAL, 'e'):
350                 case O(CREATE,'e'):
351                 case O(ASSEMBLE,'e'):
352                 case O(MISC,'e'): /* set metadata (superblock) information */
353                         if (ss) {
354                                 fprintf(stderr, Name ": metadata information already given\n");
355                                 exit(2);
356                         }
357                         for(i=0; !ss && superlist[i]; i++)
358                                 ss = superlist[i]->match_metadata_desc(optarg);
359
360                         if (!ss) {
361                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
362                                 exit(2);
363                         }
364                         max_disks = ss->max_devs;
365                         continue;
366
367                 case O(MANAGE,'W'):
368                 case O(BUILD,'W'):
369                 case O(CREATE,'W'):
370                         /* set write-mostly for following devices */
371                         writemostly = 1;
372                         continue;
373
374                 case O(MANAGE,'w'):
375                         /* clear write-mostly for following devices */
376                         writemostly = 2;
377                         continue;
378
379
380                 case O(GROW,'z'):
381                 case O(CREATE,'z'):
382                 case O(BUILD,'z'): /* size */
383                         if (size >= 0) {
384                                 fprintf(stderr, Name ": size may only be specified once. "
385                                         "Second value is %s.\n", optarg);
386                                 exit(2);
387                         }
388                         if (strcmp(optarg, "max")==0)
389                                 size = 0;
390                         else {
391                                 size = strtoll(optarg, &c, 10);
392                                 if (!optarg[0] || *c || size < 4) {
393                                         fprintf(stderr, Name ": invalid size: %s\n",
394                                                 optarg);
395                                         exit(2);
396                                 }
397                         }
398                         continue;
399
400                 case O(GROW,'Z'): /* array size */
401                         if (array_size >= 0) {
402                                 fprintf(stderr, Name ": array-size may only be specified once. "
403                                         "Second value is %s.\n", optarg);
404                                 exit(2);
405                         }
406                         if (strcmp(optarg, "max") == 0)
407                                 array_size = 0;
408                         else {
409                                 array_size = parse_size(optarg);
410                                 if (array_size <= 0) {
411                                         fprintf(stderr, Name ": invalid array size: %s\n",
412                                                 optarg);
413                                         exit(2);
414                                 }
415                         }
416                         continue;
417
418                 case O(GROW,'l'): /* hack - needed to understand layout */
419                 case O(CREATE,'l'):
420                 case O(BUILD,'l'): /* set raid level*/
421                         if (level != UnSet) {
422                                 fprintf(stderr, Name ": raid level may only be set once.  "
423                                         "Second value is %s.\n", optarg);
424                                 exit(2);
425                         }
426                         level = map_name(pers, optarg);
427                         if (level == UnSet) {
428                                 fprintf(stderr, Name ": invalid raid level: %s\n",
429                                         optarg);
430                                 exit(2);
431                         }
432                         if (level != 0 && level != -1 && level != 1 && level != -4 && level != -5 && mode == BUILD) {
433                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
434                                         optarg);
435                                 exit(2);
436                         }
437                         if (sparedisks > 0 && level < 1 && level >= -1) {
438                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
439                                         optarg);
440                                 exit(2);
441                         }
442                         ident.level = level;
443                         continue;
444
445                 case O(CREATE,'p'): /* raid5 layout */
446                 case O(BUILD,'p'): /* faulty layout */
447                 case O(GROW, 'p'): /* faulty reconfig */
448                         if (layout != UnSet) {
449                                 fprintf(stderr,Name ": layout may only be sent once.  "
450                                         "Second value was %s\n", optarg);
451                                 exit(2);
452                         }
453                         switch(level) {
454                         default:
455                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
456                                         map_num(pers, level));
457                                 exit(2);
458                         case UnSet:
459                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
460                                 exit(2);
461
462                         case 5:
463                                 layout = map_name(r5layout, optarg);
464                                 if (layout==UnSet) {
465                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
466                                                 optarg);
467                                         exit(2);
468                                 }
469                                 break;
470                         case 6:
471                                 layout = map_name(r6layout, optarg);
472                                 if (layout==UnSet) {
473                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
474                                                 optarg);
475                                         exit(2);
476                                 }
477                                 break;
478
479                         case 10:
480                                 layout = parse_layout_10(optarg);
481                                 if (layout < 0) {
482                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
483                                         exit(2);
484                                 }
485                                 break;
486                         case -5: /* Faulty
487                                   * modeNNN
488                                   */
489                                 layout = parse_layout_faulty(optarg);
490                                 if (layout == -1) {
491                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
492                                                 optarg);
493                                         exit(2);
494                                 }
495                                 break;
496                         }
497                         continue;
498
499                 case O(CREATE,AssumeClean):
500                 case O(BUILD,AssumeClean): /* assume clean */
501                         assume_clean = 1;
502                         continue;
503
504                 case O(GROW,'n'):
505                 case O(CREATE,'n'):
506                 case O(BUILD,'n'): /* number of raid disks */
507                         if (raiddisks) {
508                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
509                                         raiddisks, optarg);
510                                 exit(2);
511                         }
512                         raiddisks = strtol(optarg, &c, 10);
513                         if (!optarg[0] || *c || raiddisks<=0) {
514                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
515                                         optarg);
516                                 exit(2);
517                         }
518                         ident.raid_disks = raiddisks;
519                         continue;
520
521                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
522                         if (sparedisks) {
523                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
524                                         sparedisks, optarg);
525                                 exit(2);
526                         }
527                         if (level != UnSet && level <= 0 && level >= -1) {
528                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
529                                         level);
530                                 exit(2);
531                         }
532                         sparedisks = strtol(optarg, &c, 10);
533                         if (!optarg[0] || *c || sparedisks < 0) {
534                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
535                                         optarg);
536                                 exit(2);
537                         }
538                         continue;
539
540                 case O(CREATE,'a'):
541                 case O(BUILD,'a'):
542                 case O(INCREMENTAL,'a'):
543                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
544                         autof = parse_auto(optarg, "--auto flag", 0);
545                         continue;
546
547                 case O(CREATE,Symlinks):
548                 case O(BUILD,Symlinks):
549                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
550                         symlinks = optarg;
551                         continue;
552
553                 case O(BUILD,'f'): /* force honouring '-n 1' */
554                 case O(GROW,'f'): /* ditto */
555                 case O(CREATE,'f'): /* force honouring of device list */
556                 case O(ASSEMBLE,'f'): /* force assembly */
557                 case O(MISC,'f'): /* force zero */
558                         force=1;
559                         continue;
560
561                         /* now for the Assemble options */
562                 case O(CREATE,'u'): /* uuid of array */
563                 case O(ASSEMBLE,'u'): /* uuid of array */
564                         if (ident.uuid_set) {
565                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
566                                         "Second value %s.\n", optarg);
567                                 exit(2);
568                         }
569                         if (parse_uuid(optarg, ident.uuid))
570                                 ident.uuid_set = 1;
571                         else {
572                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
573                                 exit(2);
574                         }
575                         continue;
576
577                 case O(CREATE,'N'):
578                 case O(ASSEMBLE,'N'):
579                         if (ident.name[0]) {
580                                 fprintf(stderr, Name ": name cannot be set twice.   "
581                                         "Second value %s.\n", optarg);
582                                 exit(2);
583                         }
584                         if (strlen(optarg) > 32) {
585                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
586                                         optarg);
587                                 exit(2);
588                         }
589                         strcpy(ident.name, optarg);
590                         continue;
591
592                 case O(ASSEMBLE,'m'): /* super-minor for array */
593                         if (ident.super_minor != UnSet) {
594                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
595                                         "Second value: %s.\n", optarg);
596                                 exit(2);
597                         }
598                         if (strcmp(optarg, "dev")==0)
599                                 ident.super_minor = -2;
600                         else {
601                                 ident.super_minor = strtoul(optarg, &cp, 10);
602                                 if (!optarg[0] || *cp) {
603                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
604                                         exit(2);
605                                 }
606                         }
607                         continue;
608
609                 case O(ASSEMBLE,'U'): /* update the superblock */
610                         if (update) {
611                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
612                                         update, optarg);
613                                 exit(2);
614                         }
615                         update = optarg;
616                         if (strcmp(update, "sparc2.2")==0)
617                                 continue;
618                         if (strcmp(update, "super-minor") == 0)
619                                 continue;
620                         if (strcmp(update, "summaries")==0)
621                                 continue;
622                         if (strcmp(update, "resync")==0)
623                                 continue;
624                         if (strcmp(update, "uuid")==0)
625                                 continue;
626                         if (strcmp(update, "name")==0)
627                                 continue;
628                         if (strcmp(update, "homehost")==0)
629                                 continue;
630                         if (strcmp(update, "devicesize")==0)
631                                 continue;
632                         if (strcmp(update, "byteorder")==0) {
633                                 if (ss) {
634                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
635                                         exit(2);
636                                 }
637                                 for(i=0; !ss && superlist[i]; i++)
638                                         ss = superlist[i]->match_metadata_desc("0.swap");
639                                 if (!ss) {
640                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
641                                         exit(2);
642                                 }
643
644                                 continue;
645                         }
646                         if (strcmp(update,"?") == 0 ||
647                             strcmp(update, "help") == 0) {
648                                 outf = stdout;
649                                 fprintf(outf, Name ": ");
650                         } else {
651                                 outf = stderr;
652                                 fprintf(outf,
653                                         Name ": '--update=%s' is invalid.  ",
654                                         update);
655                         }
656                         fprintf(outf, "Valid --update options are:\n"
657                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
658                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
659                         exit(outf == stdout ? 0 : 2);
660
661                 case O(INCREMENTAL,NoDegraded):
662                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
663                         runstop = -1; /* --stop isn't allowed for --assemble,
664                                        * so we overload slightly */
665                         continue;
666
667                 case O(ASSEMBLE,'c'): /* config file */
668                 case O(INCREMENTAL, 'c'):
669                 case O(MISC, 'c'):
670                 case O(MONITOR,'c'):
671                         if (configfile) {
672                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
673                                         "Second value is %s.\n", optarg);
674                                 exit(2);
675                         }
676                         configfile = optarg;
677                         set_conffile(configfile);
678                         /* FIXME possibly check that config file exists.  Even parse it */
679                         continue;
680                 case O(ASSEMBLE,'s'): /* scan */
681                 case O(MISC,'s'):
682                 case O(MONITOR,'s'):
683                 case O(INCREMENTAL,'s'):
684                         scan = 1;
685                         continue;
686
687                 case O(MONITOR,'m'): /* mail address */
688                         if (mailaddr)
689                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
690                                         optarg);
691                         else
692                                 mailaddr = optarg;
693                         continue;
694
695                 case O(MONITOR,'p'): /* alert program */
696                         if (program)
697                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
698                                         optarg);
699                         else
700                                 program = optarg;
701                         continue;
702
703                 case O(MONITOR,'d'): /* delay in seconds */
704                 case O(GROW, 'd'):
705                 case O(BUILD,'d'): /* delay for bitmap updates */
706                 case O(CREATE,'d'):
707                         if (delay)
708                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
709                                         optarg);
710                         else {
711                                 delay = strtol(optarg, &c, 10);
712                                 if (!optarg[0] || *c || delay<1) {
713                                         fprintf(stderr, Name ": invalid delay: %s\n",
714                                                 optarg);
715                                         exit(2);
716                                 }
717                         }
718                         continue;
719                 case O(MONITOR,'f'): /* daemonise */
720                         daemonise = 1;
721                         continue;
722                 case O(MONITOR,'i'): /* pid */
723                         if (pidfile)
724                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
725                                         optarg);
726                         else
727                                 pidfile = optarg;
728                         continue;
729                 case O(MONITOR,'1'): /* oneshot */
730                         oneshot = 1;
731                         continue;
732                 case O(MONITOR,'t'): /* test */
733                         test = 1;
734                         continue;
735                 case O(MONITOR,'y'): /* log messages to syslog */
736                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
737                         dosyslog = 1;
738                         continue;
739
740                         /* now the general management options.  Some are applicable
741                          * to other modes. None have arguments.
742                          */
743                 case O(GROW,'a'):
744                 case O(MANAGE,'a'): /* add a drive */
745                         devmode = 'a';
746                         re_add = 0;
747                         continue;
748                 case O(MANAGE,ReAdd):
749                         devmode = 'a';
750                         re_add = 1;
751                         continue;
752                 case O(MANAGE,'r'): /* remove a drive */
753                         devmode = 'r';
754                         continue;
755                 case O(MANAGE,'f'): /* set faulty */
756                         devmode = 'f';
757                         continue;
758                 case O(INCREMENTAL,'R'):
759                 case O(MANAGE,'R'):
760                 case O(ASSEMBLE,'R'):
761                 case O(BUILD,'R'):
762                 case O(CREATE,'R'): /* Run the array */
763                         if (runstop < 0) {
764                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
765                                 exit(2);
766                         }
767                         runstop = 1;
768                         continue;
769                 case O(MANAGE,'S'):
770                         if (runstop > 0) {
771                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
772                                 exit(2);
773                         }
774                         runstop = -1;
775                         continue;
776
777                 case O(MISC,'Q'):
778                 case O(MISC,'D'):
779                 case O(MISC,'E'):
780                 case O(MISC,'K'):
781                 case O(MISC,'R'):
782                 case O(MISC,'S'):
783                 case O(MISC,'X'):
784                 case O(MISC,'o'):
785                 case O(MISC,'w'):
786                 case O(MISC,'W'):
787                 case O(MISC, Waitclean):
788                 case O(MISC, DetailPlatform):
789                         if (devmode && devmode != opt &&
790                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
791                                 fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
792                                         devmode =='E'?opt:devmode);
793                                 exit(2);
794                         }
795                         devmode = opt;
796                         continue;
797                 case O(MISC,'t'):
798                         test = 1;
799                         continue;
800
801                 case O(MISC, Sparc22):
802                         if (devmode != 'E') {
803                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
804                                 exit(2);
805                         }
806                         SparcAdjust = 1;
807                         continue;
808
809                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
810                         if (!optarg) {
811                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
812                                 exit(2);
813                         }
814                         if (strcmp(optarg, "internal")==0) {
815                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
816                                 continue;
817                         }
818                         bitmap_fd = open(optarg, O_RDWR);
819                         if (!*optarg || bitmap_fd < 0) {
820                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
821                                 exit(2);
822                         }
823                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
824                         continue;
825
826                 case O(ASSEMBLE, BackupFile):
827                 case O(GROW, BackupFile):
828                         /* Specify a file into which grow might place a backup,
829                          * or from which assemble might recover a backup
830                          */
831                         if (backup_file) {
832                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
833                                 exit(2);
834                         }
835                         backup_file = optarg;
836                         continue;
837
838                 case O(BUILD,'b'):
839                 case O(CREATE,'b'): /* here we create the bitmap */
840                         if (strcmp(optarg, "none") == 0) {
841                                 fprintf(stderr, Name ": '--bitmap none' only"
842                                         " support for --grow\n");
843                                 exit(2);
844                         }
845                         /* FALL THROUGH */
846                 case O(GROW,'b'):
847                         if (strcmp(optarg, "internal")== 0 ||
848                             strcmp(optarg, "none")== 0 ||
849                             strchr(optarg, '/') != NULL) {
850                                 bitmap_file = optarg;
851                                 continue;
852                         }
853                         /* probable typo */
854                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n");
855                         exit(2);
856
857                 case O(GROW,BitmapChunk):
858                 case O(BUILD,BitmapChunk):
859                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
860                         bitmap_chunk = strtol(optarg, &c, 10);
861                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
862                                         bitmap_chunk & (bitmap_chunk - 1)) {
863                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
864                                                 optarg);
865                                 exit(2);
866                         }
867                         /* convert K to B, chunk of 0K means 512B */
868                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
869                         continue;
870
871                 case O(GROW, WriteBehind):
872                 case O(BUILD, WriteBehind):
873                 case O(CREATE, WriteBehind): /* write-behind mode */
874                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
875                         if (optarg) {
876                                 write_behind = strtol(optarg, &c, 10);
877                                 if (write_behind < 0 || *c ||
878                                     write_behind > 16383) {
879                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
880                                         exit(2);
881                                 }
882                         }
883                         continue;
884
885                 case O(INCREMENTAL, 'r'):
886                         rebuild_map = 1;
887                         continue;
888                 }
889                 /* We have now processed all the valid options. Anything else is
890                  * an error
891                  */
892                 if (option_index > 0)
893                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
894                                 long_options[option_index].name,
895                                 map_num(modes, mode));
896                 else
897                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
898                                 opt, map_num(modes, mode));
899                 exit(2);
900
901         }
902
903         if (print_help) {
904                 char *help_text = Help;
905                 if (print_help == 2)
906                         help_text = OptionHelp;
907                 else
908                         switch (mode) {
909                         case ASSEMBLE : help_text = Help_assemble; break;
910                         case BUILD    : help_text = Help_build; break;
911                         case CREATE   : help_text = Help_create; break;
912                         case MANAGE   : help_text = Help_manage; break;
913                         case MISC     : help_text = Help_misc; break;
914                         case MONITOR  : help_text = Help_monitor; break;
915                         case GROW     : help_text = Help_grow; break;
916                         case INCREMENTAL:help_text= Help_incr; break;
917                         }
918                 fputs(help_text,stdout);
919                 exit(0);
920         }
921
922         if (!mode && devs_found) {
923                 mode = MISC;
924                 devmode = 'Q';
925                 if (devlist->disposition == 0)
926                         devlist->disposition = devmode;
927         }
928         if (!mode) {
929                 fputs(Usage, stderr);
930                 exit(2);
931         }
932
933         if (symlinks) {
934                 struct createinfo *ci = conf_get_create_info();
935
936                 if (strcasecmp(symlinks, "yes") == 0)
937                         ci->symlinks = 1;
938                 else if (strcasecmp(symlinks, "no") == 0)
939                         ci->symlinks = 0;
940                 else {
941                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
942                         exit(2);
943                 }
944         }
945         /* Ok, got the option parsing out of the way
946          * hopefully it's mostly right but there might be some stuff
947          * missing
948          *
949          * That is mosty checked in the per-mode stuff but...
950          *
951          * For @,B,C  and A without -s, the first device listed must be an md device
952          * we check that here and open it.
953          */
954
955         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
956             (mode == ASSEMBLE && ! scan)) {
957                 if (devs_found < 1) {
958                         fprintf(stderr, Name ": an md device must be given in this mode\n");
959                         exit(2);
960                 }
961                 if ((int)ident.super_minor == -2 && autof) {
962                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
963                         exit(2);
964                 }
965                 if (mode == MANAGE || mode == GROW) {
966                         mdfd = open_mddev(devlist->devname, 1);
967                         if (mdfd < 0)
968                                 exit(1);
969                 } else
970                         /* non-existent device is OK */
971                         mdfd = open_mddev(devlist->devname, 0);
972                 if (mdfd == -2) {
973                         fprintf(stderr, Name ": device %s exists but is not an "
974                                 "md array.\n", devlist->devname);
975                         exit(1);
976                 }
977                 if ((int)ident.super_minor == -2) {
978                         struct stat stb;
979                         if (mdfd < 0) {
980                                 fprintf(stderr, Name ": --super-minor=dev given, and "
981                                         "listed device %s doesn't exist.\n",
982                                         devlist->devname);
983                                 exit(1);
984                         }
985                         fstat(mdfd, &stb);
986                         ident.super_minor = minor(stb.st_rdev);
987                 }
988                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
989                         /* We don't really want this open yet, we just might
990                          * have wanted to check some things
991                          */
992                         close(mdfd);
993                         mdfd = -1;
994                 }
995         }
996
997         if (raiddisks) {
998                 if (raiddisks > max_disks) {
999                         fprintf(stderr, Name ": invalid number of raid devices: %d\n",
1000                                 raiddisks);
1001                         exit(2);
1002                 }
1003                 if (raiddisks == 1 &&  !force && level != -5) {
1004                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1005                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1006                                 "     setting the number of drives.\n");
1007                         exit(2);
1008                 }
1009         }
1010         if (sparedisks) {
1011                 if ( sparedisks > max_disks - raiddisks) {
1012                         fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
1013                                 sparedisks);
1014                         exit(2);
1015                 }
1016         }
1017
1018         if (homehost == NULL)
1019                 homehost = conf_get_homehost(&require_homehost);
1020         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1021                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1022                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1023                         homehost = sys_hostname;
1024                 }
1025         }
1026
1027         ident.autof = autof;
1028
1029         rv = 0;
1030         switch(mode) {
1031         case MANAGE:
1032                 /* readonly, add/remove, readwrite, runstop */
1033                 if (readonly>0)
1034                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1035                 if (!rv && devs_found>1)
1036                         rv = Manage_subdevs(devlist->devname, mdfd,
1037                                             devlist->next, verbose-quiet);
1038                 if (!rv && readonly < 0)
1039                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1040                 if (!rv && runstop)
1041                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1042                 break;
1043         case ASSEMBLE:
1044                 if (devs_found == 1 && ident.uuid_set == 0 &&
1045                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1046                         /* Only a device has been given, so get details from config file */
1047                         mddev_ident_t array_ident = conf_get_ident(devlist->devname);
1048                         if (array_ident == NULL) {
1049                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1050                                         devlist->devname);
1051                                 rv |= 1;
1052                                 if (mdfd >= 0)
1053                                         close(mdfd);
1054                         } else {
1055                                 if (array_ident->autof == 0)
1056                                         array_ident->autof = autof;
1057                                 rv |= Assemble(ss, devlist->devname, array_ident,
1058                                                NULL, backup_file,
1059                                                readonly, runstop, update,
1060                                                homehost, require_homehost,
1061                                                verbose-quiet, force);
1062                         }
1063                 } else if (!scan)
1064                         rv = Assemble(ss, devlist->devname, &ident,
1065                                       devlist->next, backup_file,
1066                                       readonly, runstop, update,
1067                                       homehost, require_homehost,
1068                                       verbose-quiet, force);
1069                 else if (devs_found>0) {
1070                         if (update && devs_found > 1) {
1071                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1072                                 exit(1);
1073                         }
1074                         if (backup_file && devs_found > 1) {
1075                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1076                                 exit(1);
1077                         }
1078                         for (dv = devlist ; dv ; dv=dv->next) {
1079                                 mddev_ident_t array_ident = conf_get_ident(dv->devname);
1080                                 if (array_ident == NULL) {
1081                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1082                                                 dv->devname);
1083                                         rv |= 1;
1084                                         continue;
1085                                 }
1086                                 if (array_ident->autof == 0)
1087                                         array_ident->autof = autof;
1088                                 rv |= Assemble(ss, dv->devname, array_ident,
1089                                                NULL, backup_file,
1090                                                readonly, runstop, update,
1091                                                homehost, require_homehost,
1092                                                verbose-quiet, force);
1093                         }
1094                 } else {
1095                         mddev_ident_t array_list =  conf_get_ident(NULL);
1096                         mddev_dev_t devlist = conf_get_devs();
1097                         int cnt = 0;
1098                         if (devlist == NULL) {
1099                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1100                                 exit(1);
1101                         }
1102                         if (update) {
1103                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1104                                 exit(1);
1105                         }
1106                         if (backup_file) {
1107                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1108                                 exit(1);
1109                         }
1110                         for (; array_list; array_list = array_list->next) {
1111                                 if (array_list->devname &&
1112                                     strcasecmp(array_list->devname, "<ignore>") == 0)
1113                                         continue;
1114                                 if (array_list->autof == 0)
1115                                         array_list->autof = autof;
1116                                 
1117                                 rv |= Assemble(ss, array_list->devname,
1118                                                array_list,
1119                                                NULL, NULL,
1120                                                readonly, runstop, NULL,
1121                                                homehost, require_homehost,
1122                                                verbose-quiet, force);
1123                                 cnt++;
1124                         }
1125                         if (homehost && cnt == 0) {
1126                                 /* Maybe we can auto-assemble something.
1127                                  * Repeatedly call Assemble in auto-assemble mode
1128                                  * until it fails
1129                                  */
1130                                 int rv2;
1131                                 int acnt;
1132                                 ident.autof = autof;
1133                                 do {
1134                                         mddev_dev_t devlist = conf_get_devs();
1135                                         acnt = 0;
1136                                         do {
1137                                                 rv2 = Assemble(ss, NULL,
1138                                                                &ident,
1139                                                                devlist, NULL,
1140                                                                readonly, runstop, NULL,
1141                                                                homehost, require_homehost,
1142                                                                verbose-quiet, force);
1143                                                 if (rv2==0) {
1144                                                         cnt++;
1145                                                         acnt++;
1146                                                 }
1147                                                 if (rv2 == 1)
1148                                                         /* found something so even though assembly failed  we
1149                                                          * want to avoid auto-updates
1150                                                          */
1151                                                         auto_update_home = 0;
1152                                         } while (rv2!=2);
1153                                         /* Incase there are stacked devices, we need to go around again */
1154                                 } while (acnt);
1155                                 if (cnt == 0 && auto_update_home && homehost) {
1156                                         /* Nothing found, maybe we need to bootstrap homehost info */
1157                                         do {
1158                                                 acnt = 0;
1159                                                 do {
1160                                                         rv2 = Assemble(ss, NULL,
1161                                                                        &ident,
1162                                                                        NULL, NULL,
1163                                                                        readonly, runstop, "homehost",
1164                                                                        homehost, require_homehost,
1165                                                                        verbose-quiet, force);
1166                                                         if (rv2==0) {
1167                                                                 cnt++;
1168                                                                 acnt++;
1169                                                         }
1170                                                 } while (rv2!=2);
1171                                                 /* Incase there are stacked devices, we need to go around again */
1172                                         } while (acnt);
1173                                 }
1174                                 if (cnt == 0 && rv == 0) {
1175                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1176                                         rv = 1;
1177                                 } else if (cnt)
1178                                         rv = 0;
1179                         } else if (cnt == 0 && rv == 0) {
1180                                 fprintf(stderr, Name ": No arrays found in config file\n");
1181                                 rv = 1;
1182                         }
1183                 }
1184                 break;
1185         case BUILD:
1186                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1187                 if (write_behind && !bitmap_file) {
1188                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1189                         rv = 1;
1190                         break;
1191                 }
1192                 if (raiddisks == 0) {
1193                         fprintf(stderr, Name ": no raid-devices specified.\n");
1194                         rv = 1;
1195                         break;
1196                 }
1197
1198                 if (bitmap_file) {
1199                         if (strcmp(bitmap_file, "internal")==0) {
1200                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1201                                 rv |= 1;
1202                                 break;
1203                         }
1204                 }
1205                 rv = Build(devlist->devname, chunk, level, layout,
1206                            raiddisks, devlist->next, assume_clean,
1207                            bitmap_file, bitmap_chunk, write_behind,
1208                            delay, verbose-quiet, autof, size);
1209                 break;
1210         case CREATE:
1211                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1212                 if (write_behind && !bitmap_file) {
1213                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1214                         rv = 1;
1215                         break;
1216                 }
1217                 if (raiddisks == 0) {
1218                         fprintf(stderr, Name ": no raid-devices specified.\n");
1219                         rv = 1;
1220                         break;
1221                 }
1222
1223                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1224                             raiddisks, sparedisks, ident.name, homehost,
1225                             ident.uuid_set ? ident.uuid : NULL,
1226                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1227                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1228                 break;
1229         case MISC:
1230                 if (devmode == 'E') {
1231                         if (devlist == NULL && !scan) {
1232                                 fprintf(stderr, Name ": No devices to examine\n");
1233                                 exit(2);
1234                         }
1235                         if (devlist == NULL)
1236                                 devlist = conf_get_devs();
1237                         if (devlist == NULL) {
1238                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1239                                 exit(1);
1240                         }
1241                         if (brief && verbose)
1242                                 brief = 2;
1243                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1244                                      export, scan,
1245                                      SparcAdjust, ss, homehost);
1246                 } else if (devmode == DetailPlatform) {
1247                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1248                 } else {
1249                         if (devlist == NULL) {
1250                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1251                                         /* apply --detail or --wait-clean to
1252                                          * all devices in /proc/mdstat
1253                                          */
1254                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1255                                         struct mdstat_ent *e;
1256                                         struct map_ent *map = NULL;
1257                                         int v = verbose>1?0:verbose+1;
1258
1259                                         for (e=ms ; e ; e=e->next) {
1260                                                 char *name;
1261                                                 struct map_ent *me;
1262                                                 me = map_by_devnum(&map, e->devnum);
1263                                                 if (me && me->path
1264                                                     && strcmp(me->path, "/unknown") != 0)
1265                                                         name = me->path;
1266                                                 else
1267                                                         name = get_md_name(e->devnum);
1268
1269                                                 if (!name) {
1270                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1271                                                                 e->dev);
1272                                                         continue;
1273                                                 }
1274                                                 if (devmode == 'D')
1275                                                         rv |= Detail(name, v,
1276                                                                      export, test,
1277                                                                      homehost);
1278                                                 else
1279                                                         rv |= WaitClean(name, v);
1280                                                 put_md_name(name);
1281                                         }
1282                                         free_mdstat(ms);
1283                                 } else  if (devmode == 'S' && scan) {
1284                                         /* apply --stop to all devices in /proc/mdstat */
1285                                         /* Due to possible stacking of devices, repeat until
1286                                          * nothing more can be stopped
1287                                          */
1288                                         int progress=1, err;
1289                                         int last = 0;
1290                                         do {
1291                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1292                                                 struct mdstat_ent *e;
1293
1294                                                 if (!progress) last = 1;
1295                                                 progress = 0; err = 0;
1296                                                 for (e=ms ; e ; e=e->next) {
1297                                                         char *name = get_md_name(e->devnum);
1298
1299                                                         if (!name) {
1300                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1301                                                                         e->dev);
1302                                                                 continue;
1303                                                         }
1304                                                         mdfd = open_mddev(name, 1);
1305                                                         if (mdfd >= 0) {
1306                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1307                                                                         err = 1;
1308                                                                 else
1309                                                                         progress = 1;
1310                                                                 close(mdfd);
1311                                                         }
1312
1313                                                         put_md_name(name);
1314                                                 }
1315                                                 free_mdstat(ms);
1316                                         } while (!last && err);
1317                                         if (err) rv |= 1;
1318                                 } else {
1319                                         fprintf(stderr, Name ": No devices given.\n");
1320                                         exit(2);
1321                                 }
1322                         }
1323                         for (dv=devlist ; dv; dv=dv->next) {
1324                                 switch(dv->disposition) {
1325                                 case 'D':
1326                                         rv |= Detail(dv->devname,
1327                                                      brief?1+verbose:0,
1328                                                      export, test, homehost);
1329                                         continue;
1330                                 case 'K': /* Zero superblock */
1331                                         rv |= Kill(dv->devname, force, quiet,0);
1332                                         continue;
1333                                 case 'Q':
1334                                         rv |= Query(dv->devname); continue;
1335                                 case 'X':
1336                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1337                                 case 'W':
1338                                         rv |= Wait(dv->devname); continue;
1339                                 case Waitclean:
1340                                         rv |= WaitClean(dv->devname, verbose-quiet); continue;
1341                                 }
1342                                 mdfd = open_mddev(dv->devname, 1);
1343                                 if (mdfd>=0) {
1344                                         switch(dv->disposition) {
1345                                         case 'R':
1346                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1347                                         case 'S':
1348                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1349                                         case 'o':
1350                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1351                                         case 'w':
1352                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1353                                         }
1354                                         close(mdfd);
1355                                 } else
1356                                         rv |= 1;
1357                         }
1358                 }
1359                 break;
1360         case MONITOR:
1361                 if (!devlist && !scan) {
1362                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1363                         rv = 1;
1364                         break;
1365                 }
1366                 if (pidfile && !daemonise) {
1367                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1368                         rv = 1;
1369                         break;
1370                 }
1371                 rv= Monitor(devlist, mailaddr, program,
1372                             delay?delay:60, daemonise, scan, oneshot,
1373                             dosyslog, test, pidfile);
1374                 break;
1375
1376         case GROW:
1377                 if (array_size >= 0) {
1378                         /* alway impose array size first, independent of
1379                          * anything else
1380                          */
1381                         struct mdinfo sra;
1382                         int err;
1383                         sysfs_init(&sra, mdfd, 0);
1384                         if (array_size == 0)
1385                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1386                         else
1387                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1388                         if (err < 0) {
1389                                 if (errno == E2BIG)
1390                                         fprintf(stderr, Name ": --array-size setting"
1391                                                 " is too large.\n");
1392                                 else
1393                                         fprintf(stderr, Name ": current kernel does"
1394                                                 " not support setting --array-size\n");
1395                                 rv = 1;
1396                                 break;
1397                         }
1398                 }
1399                 if (devs_found > 1) {
1400
1401                         /* must be '-a'. */
1402                         if (size >= 0 || raiddisks) {
1403                                 fprintf(stderr, Name ": --size, --raiddisks, and --add are exclusing in --grow mode\n");
1404                                 rv = 1;
1405                                 break;
1406                         }
1407                         for (dv=devlist->next; dv ; dv=dv->next) {
1408                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1409                                 if (rv)
1410                                         break;
1411                         }
1412                 } else if ((size >= 0) + (raiddisks != 0) +  (layout != UnSet) + (bitmap_file != NULL)> 1) {
1413                         fprintf(stderr, Name ": can change at most one of size, raiddisks, bitmap, and layout\n");
1414                         rv = 1;
1415                         break;
1416                 } else if (layout != UnSet)
1417                         rv = Manage_reconfig(devlist->devname, mdfd, layout);
1418                 else if (size >= 0 || raiddisks)
1419                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1420                                           size, level, layout, chunk, raiddisks);
1421                 else if (bitmap_file) {
1422                         if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1423                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1424                                             bitmap_chunk, delay, write_behind, force);
1425                 } else if (array_size < 0)
1426                         fprintf(stderr, Name ": no changes to --grow\n");
1427                 break;
1428         case INCREMENTAL:
1429                 if (rebuild_map) {
1430                         RebuildMap();
1431                 }
1432                 if (scan) {
1433                         if (runstop <= 0) {
1434                                 fprintf(stderr, Name
1435                          ": --incremental --scan meaningless without --run.\n");
1436                                 break;
1437                         }
1438                         rv = IncrementalScan(verbose);
1439                 }
1440                 if (!devlist) {
1441                         if (!rebuild_map && !scan) {
1442                                 fprintf(stderr, Name
1443                                         ": --incremental requires a device.\n");
1444                                 rv = 1;
1445                         }
1446                         break;
1447                 }
1448                 if (devlist->next) {
1449                         fprintf(stderr, Name
1450                                ": --incremental can only handle one device.\n");
1451                         rv = 1;
1452                         break;
1453                 }
1454                 rv = Incremental(devlist->devname, verbose-quiet, runstop,
1455                                  ss, homehost, require_homehost, autof);
1456                 break;
1457         case AUTODETECT:
1458                 autodetect();
1459                 break;
1460         }
1461         exit(rv);
1462 }