Stop managed arrays more carefully.
[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 export = 0;
78         int assume_clean = 0;
79         char *symlinks = NULL;
80         /* autof indicates whether and how to create device node.
81          * bottom 3 bits are style.  Rest (when shifted) are number of parts
82          * 0  - unset
83          * 1  - don't create (no)
84          * 2  - if is_standard, then create (yes)
85          * 3  - create as 'md' - reject is_standard mdp (md)
86          * 4  - create as 'mdp' - reject is_standard md (mdp)
87          * 5  - default to md if not is_standard (md in config file)
88          * 6  - default to mdp if not is_standard (part, or mdp in config file)
89          */
90         int autof = 0;
91
92         char *homehost = NULL;
93         char sys_hostname[256];
94         char *mailaddr = NULL;
95         char *program = NULL;
96         int delay = 0;
97         int daemonise = 0;
98         char *pidfile = NULL;
99         int oneshot = 0;
100         struct supertype *ss = NULL;
101         int writemostly = 0;
102         int re_add = 0;
103         char *shortopt = short_options;
104         int dosyslog = 0;
105         int rebuild_map = 0;
106         int auto_update_home = 0;
107
108         int copies;
109         int print_help = 0;
110         FILE *outf;
111
112         int mdfd = -1;
113
114         srandom(time(0) ^ getpid());
115
116         ident.uuid_set=0;
117         ident.level = UnSet;
118         ident.raid_disks = UnSet;
119         ident.super_minor= UnSet;
120         ident.devices=0;
121         ident.spare_group = NULL;
122         ident.autof = 0;
123         ident.st = NULL;
124         ident.bitmap_fd = -1;
125         ident.bitmap_file = NULL;
126         ident.name[0] = 0;
127
128         while ((option_index = -1) ,
129                (opt=getopt_long(argc, argv,
130                                 shortopt, long_options,
131                                 &option_index)) != -1) {
132                 int newmode = mode;
133                 /* firstly, some mode-independant options */
134                 switch(opt) {
135                 case 'h':
136                         if (option_index > 0 &&
137                             strcmp(long_options[option_index].name, "help-options")==0)
138                                 print_help = 2;
139                         else
140                                 print_help = 1;
141                         continue;
142
143                 case 'V':
144                         fputs(Version, stderr);
145                         exit(0);
146
147                 case 'v': verbose++;
148                         continue;
149
150                 case 'q': quiet++;
151                         continue;
152
153                 case 'b':
154                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW)
155                                 break; /* b means bitmap */
156                         brief = 1;
157                         if (optarg) {
158                                 fprintf(stderr, Name ": -b cannot have any extra immediately after it, sorry.\n");
159                                 exit(2);
160                         }
161                         continue;
162
163                 case 'Y': export++;
164                         continue;
165
166                 case HomeHost:
167                         homehost = optarg;
168                         continue;
169
170                 case ':':
171                 case '?':
172                         fputs(Usage, stderr);
173                         exit(2);
174                 }
175                 /* second, figure out the mode.
176                  * Some options force the mode.  Others
177                  * set the mode if it isn't already
178                  */
179
180                 switch(opt) {
181                 case '@': /* just incase they say --manage */
182                         newmode = MANAGE;
183                         shortopt = short_bitmap_options;
184                         break;
185                 case 'a':
186                 case 'r':
187                 case 'f':
188                 case ReAdd: /* re-add */
189                         if (!mode) {
190                                 newmode = MANAGE;
191                                 shortopt = short_bitmap_options;
192                         }
193                         break;
194
195                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
196                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
197                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
198                 case 'F': newmode = MONITOR;break;
199                 case 'G': newmode = GROW;
200                         shortopt = short_bitmap_options;
201                         break;
202                 case 'I': newmode = INCREMENTAL;
203                         shortopt = short_bitmap_auto_options; break;
204                 case AutoDetect:
205                         newmode = AUTODETECT; break;
206
207                 case '#':
208                 case 'D':
209                 case 'E':
210                 case 'X':
211                 case 'Q': newmode = MISC; break;
212                 case 'R':
213                 case 'S':
214                 case 'o':
215                 case 'w':
216                 case 'W':
217                 case 'K': if (!mode) newmode = MISC; break;
218                 }
219                 if (mode && newmode == mode) {
220                         /* everybody happy ! */
221                 } else if (mode && newmode != mode) {
222                         /* not allowed.. */
223                         fprintf(stderr, Name ": ");
224                         if (option_index >= 0)
225                                 fprintf(stderr, "--%s", long_options[option_index].name);
226                         else
227                                 fprintf(stderr, "-%c", opt);
228                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
229                                 map_num(modes, newmode),
230                                 map_num(modes, mode));
231                         exit(2);
232                 } else if (!mode && newmode) {
233                         mode = newmode;
234                 } else {
235                         /* special case of -c --help */
236                         if (opt == 'c' &&
237                             ( strncmp(optarg, "--h", 3)==0 ||
238                               strncmp(optarg, "-h", 2)==0)) {
239                                 fputs(Help_config, stdout);
240                                 exit(0);
241                         }
242
243                         /* If first option is a device, don't force the mode yet */
244                         if (opt == 1) {
245                                 if (devs_found == 0) {
246                                         dv = malloc(sizeof(*dv));
247                                         if (dv == NULL) {
248                                                 fprintf(stderr, Name ": malloc failed\n");
249                                                 exit(3);
250                                         }
251                                         dv->devname = optarg;
252                                         dv->disposition = devmode;
253                                         dv->writemostly = writemostly;
254                                         dv->re_add = re_add;
255                                         dv->used = 0;
256                                         dv->next = NULL;
257                                         *devlistend = dv;
258                                         devlistend = &dv->next;
259
260                                         devs_found++;
261                                         continue;
262                                 }
263                                 /* No mode yet, and this is the second device ... */
264                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device is listed\n");
265                                 exit(2);
266                         }
267                         if (option_index >= 0)
268                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
269                         else
270                                 fprintf(stderr, Name ": -%c", opt);
271                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
272                         exit(2);
273                 }
274
275                 /* if we just set the mode, then done */
276                 switch(opt) {
277                 case '@':
278                 case '#':
279                 case 'A':
280                 case 'B':
281                 case 'C':
282                 case 'F':
283                 case 'G':
284                 case 'I':
285                 case AutoDetect:
286                         continue;
287                 }
288                 if (opt == 1) {
289                         /* an undecorated option - must be a device name.
290                          */
291                         if (devs_found > 0 && mode == '@' && !devmode) {
292                                 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
293                                 exit(2);
294                         }
295                         if (devs_found > 0 && mode == 'G' && !devmode) {
296                                 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
297                                 exit(2);
298                         }
299                         dv = malloc(sizeof(*dv));
300                         if (dv == NULL) {
301                                 fprintf(stderr, Name ": malloc failed\n");
302                                 exit(3);
303                         }
304                         dv->devname = optarg;
305                         dv->disposition = devmode;
306                         dv->writemostly = writemostly;
307                         dv->re_add = re_add;
308                         dv->next = NULL;
309                         *devlistend = dv;
310                         devlistend = &dv->next;
311
312                         devs_found++;
313                         continue;
314                 }
315
316                 /* We've got a mode, and opt is now something else which
317                  * could depend on the mode */
318 #define O(a,b) ((a<<8)|b)
319                 switch (O(mode,opt)) {
320                 case O(CREATE,'c'):
321                 case O(BUILD,'c'): /* chunk or rounding */
322                         if (chunk) {
323                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
324                                         "Second value is %s.\n", optarg);
325                                 exit(2);
326                         }
327                         chunk = strtol(optarg, &c, 10);
328                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
329                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
330                                         optarg);
331                                 exit(2);
332                         }
333                         continue;
334
335                 case O(ASSEMBLE,AutoHomeHost):
336                         auto_update_home = 1;
337                         continue;
338                 case O(INCREMENTAL, 'e'):
339                 case O(CREATE,'e'):
340                 case O(ASSEMBLE,'e'):
341                 case O(MISC,'e'): /* set metadata (superblock) information */
342                         if (ss) {
343                                 fprintf(stderr, Name ": metadata information already given\n");
344                                 exit(2);
345                         }
346                         for(i=0; !ss && superlist[i]; i++)
347                                 ss = superlist[i]->match_metadata_desc(optarg);
348
349                         if (!ss) {
350                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
351                                 exit(2);
352                         }
353                         max_disks = ss->max_devs;
354                         continue;
355
356                 case O(MANAGE,'W'):
357                 case O(BUILD,'W'):
358                 case O(CREATE,'W'):
359                         /* set write-mostly for following devices */
360                         writemostly = 1;
361                         continue;
362
363                 case O(GROW,'z'):
364                 case O(CREATE,'z'): /* size */
365                         if (size >= 0) {
366                                 fprintf(stderr, Name ": size may only be specified once. "
367                                         "Second value is %s.\n", optarg);
368                                 exit(2);
369                         }
370                         if (strcmp(optarg, "max")==0)
371                                 size = 0;
372                         else {
373                                 size = strtoll(optarg, &c, 10);
374                                 if (!optarg[0] || *c || size < 4) {
375                                         fprintf(stderr, Name ": invalid size: %s\n",
376                                                 optarg);
377                                         exit(2);
378                                 }
379                         }
380                         continue;
381
382                 case O(GROW,'l'): /* hack - needed to understand layout */
383                 case O(CREATE,'l'):
384                 case O(BUILD,'l'): /* set raid level*/
385                         if (level != UnSet) {
386                                 fprintf(stderr, Name ": raid level may only be set once.  "
387                                         "Second value is %s.\n", optarg);
388                                 exit(2);
389                         }
390                         level = map_name(pers, optarg);
391                         if (level == UnSet) {
392                                 fprintf(stderr, Name ": invalid raid level: %s\n",
393                                         optarg);
394                                 exit(2);
395                         }
396                         if (level != 0 && level != -1 && level != 1 && level != -4 && level != -5 && mode == BUILD) {
397                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
398                                         optarg);
399                                 exit(2);
400                         }
401                         if (sparedisks > 0 && level < 1 && level >= -1) {
402                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
403                                         optarg);
404                                 exit(2);
405                         }
406                         ident.level = level;
407                         continue;
408
409                 case O(CREATE,'p'): /* raid5 layout */
410                 case O(BUILD,'p'): /* faulty layout */
411                 case O(GROW, 'p'): /* faulty reconfig */
412                         if (layout != UnSet) {
413                                 fprintf(stderr,Name ": layout may only be sent once.  "
414                                         "Second value was %s\n", optarg);
415                                 exit(2);
416                         }
417                         switch(level) {
418                         default:
419                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
420                                         map_num(pers, level));
421                                 exit(2);
422                         case UnSet:
423                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
424                                 exit(2);
425
426                         case 5:
427                         case 6:
428                                 layout = map_name(r5layout, optarg);
429                                 if (layout==UnSet) {
430                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
431                                                 optarg);
432                                         exit(2);
433                                 }
434                                 break;
435
436                         case 10:
437                                 /* 'f', 'o' or 'n' followed by a number <= raid_disks */
438                                 if ((optarg[0] !=  'n' && optarg[0] != 'f' && optarg[0] != 'o') ||
439                                     (copies = strtoul(optarg+1, &cp, 10)) < 1 ||
440                                     copies > 200 ||
441                                     *cp) {
442                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
443                                         exit(2);
444                                 }
445                                 if (optarg[0] == 'n')
446                                         layout = 256 + copies;
447                                 else if (optarg[0] == 'o')
448                                         layout = 0x10000 + (copies<<8) + 1;
449                                 else
450                                         layout = 1 + (copies<<8);
451                                 break;
452                         case -5: /* Faulty
453                                   * modeNNN
454                                   */
455
456                         {
457                                 int ln = strcspn(optarg, "0123456789");
458                                 char *m = strdup(optarg);
459                                 int mode;
460                                 m[ln] = 0;
461                                 mode = map_name(faultylayout, m);
462                                 if (mode == UnSet) {
463                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
464                                                 optarg);
465                                         exit(2);
466                                 }
467                                 layout = mode | (atoi(optarg+ln)<< ModeShift);
468                         }
469                         }
470                         continue;
471
472                 case O(CREATE,AssumeClean):
473                 case O(BUILD,AssumeClean): /* assume clean */
474                         assume_clean = 1;
475                         continue;
476
477                 case O(GROW,'n'):
478                 case O(CREATE,'n'):
479                 case O(BUILD,'n'): /* number of raid disks */
480                         if (raiddisks) {
481                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
482                                         raiddisks, optarg);
483                                 exit(2);
484                         }
485                         raiddisks = strtol(optarg, &c, 10);
486                         if (!optarg[0] || *c || raiddisks<=0) {
487                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
488                                         optarg);
489                                 exit(2);
490                         }
491                         ident.raid_disks = raiddisks;
492                         continue;
493
494                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
495                         if (sparedisks) {
496                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
497                                         sparedisks, optarg);
498                                 exit(2);
499                         }
500                         if (level != UnSet && level <= 0 && level >= -1) {
501                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
502                                         level);
503                                 exit(2);
504                         }
505                         sparedisks = strtol(optarg, &c, 10);
506                         if (!optarg[0] || *c || sparedisks < 0) {
507                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
508                                         optarg);
509                                 exit(2);
510                         }
511                         continue;
512
513                 case O(CREATE,'a'):
514                 case O(BUILD,'a'):
515                 case O(INCREMENTAL,'a'):
516                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
517                         autof = parse_auto(optarg, "--auto flag", 0);
518                         continue;
519
520                 case O(CREATE,Symlinks):
521                 case O(BUILD,Symlinks):
522                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
523                         symlinks = optarg;
524                         continue;
525
526                 case O(BUILD,'f'): /* force honouring '-n 1' */
527                 case O(GROW,'f'): /* ditto */
528                 case O(CREATE,'f'): /* force honouring of device list */
529                 case O(ASSEMBLE,'f'): /* force assembly */
530                 case O(MISC,'f'): /* force zero */
531                         force=1;
532                         continue;
533
534                         /* now for the Assemble options */
535                 case O(CREATE,'u'): /* uuid of array */
536                 case O(ASSEMBLE,'u'): /* uuid of array */
537                         if (ident.uuid_set) {
538                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
539                                         "Second value %s.\n", optarg);
540                                 exit(2);
541                         }
542                         if (parse_uuid(optarg, ident.uuid))
543                                 ident.uuid_set = 1;
544                         else {
545                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
546                                 exit(2);
547                         }
548                         continue;
549
550                 case O(CREATE,'N'):
551                 case O(ASSEMBLE,'N'):
552                         if (ident.name[0]) {
553                                 fprintf(stderr, Name ": name cannot be set twice.   "
554                                         "Second value %s.\n", optarg);
555                                 exit(2);
556                         }
557                         if (strlen(optarg) > 32) {
558                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
559                                         optarg);
560                                 exit(2);
561                         }
562                         strcpy(ident.name, optarg);
563                         continue;
564
565                 case O(ASSEMBLE,'m'): /* super-minor for array */
566                         if (ident.super_minor != UnSet) {
567                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
568                                         "Second value: %s.\n", optarg);
569                                 exit(2);
570                         }
571                         if (strcmp(optarg, "dev")==0)
572                                 ident.super_minor = -2;
573                         else {
574                                 ident.super_minor = strtoul(optarg, &cp, 10);
575                                 if (!optarg[0] || *cp) {
576                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
577                                         exit(2);
578                                 }
579                         }
580                         continue;
581
582                 case O(ASSEMBLE,'U'): /* update the superblock */
583                         if (update) {
584                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
585                                         update, optarg);
586                                 exit(2);
587                         }
588                         update = optarg;
589                         if (strcmp(update, "sparc2.2")==0)
590                                 continue;
591                         if (strcmp(update, "super-minor") == 0)
592                                 continue;
593                         if (strcmp(update, "summaries")==0)
594                                 continue;
595                         if (strcmp(update, "resync")==0)
596                                 continue;
597                         if (strcmp(update, "uuid")==0)
598                                 continue;
599                         if (strcmp(update, "name")==0)
600                                 continue;
601                         if (strcmp(update, "homehost")==0)
602                                 continue;
603                         if (strcmp(update, "devicesize")==0)
604                                 continue;
605                         if (strcmp(update, "byteorder")==0) {
606                                 if (ss) {
607                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
608                                         exit(2);
609                                 }
610                                 for(i=0; !ss && superlist[i]; i++)
611                                         ss = superlist[i]->match_metadata_desc("0.swap");
612                                 if (!ss) {
613                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
614                                         exit(2);
615                                 }
616
617                                 continue;
618                         }
619                         if (strcmp(update,"?") == 0 ||
620                             strcmp(update, "help") == 0) {
621                                 outf = stdout;
622                                 fprintf(outf, Name ": ");
623                         } else {
624                                 outf = stderr;
625                                 fprintf(outf,
626                                         Name ": '--update=%s' is invalid.  ",
627                                         update);
628                         }
629                         fprintf(outf, "Valid --update options are:\n"
630                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
631                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
632                         exit(outf == stdout ? 0 : 2);
633
634                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
635                         runstop = -1; /* --stop isn't allowed for --assemble,
636                                        * so we overload slightly */
637                         continue;
638
639                 case O(ASSEMBLE,'c'): /* config file */
640                 case O(MISC, 'c'):
641                 case O(MONITOR,'c'):
642                         if (configfile) {
643                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
644                                         "Second value is %s.\n", optarg);
645                                 exit(2);
646                         }
647                         configfile = optarg;
648                         set_conffile(configfile);
649                         /* FIXME possibly check that config file exists.  Even parse it */
650                         continue;
651                 case O(ASSEMBLE,'s'): /* scan */
652                 case O(MISC,'s'):
653                 case O(MONITOR,'s'):
654                 case O(INCREMENTAL,'s'):
655                         scan = 1;
656                         continue;
657
658                 case O(MONITOR,'m'): /* mail address */
659                         if (mailaddr)
660                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
661                                         optarg);
662                         else
663                                 mailaddr = optarg;
664                         continue;
665
666                 case O(MONITOR,'p'): /* alert program */
667                         if (program)
668                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
669                                         optarg);
670                         else
671                                 program = optarg;
672                         continue;
673
674                 case O(MONITOR,'d'): /* delay in seconds */
675                 case O(GROW, 'd'):
676                 case O(BUILD,'d'): /* delay for bitmap updates */
677                 case O(CREATE,'d'):
678                         if (delay)
679                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
680                                         optarg);
681                         else {
682                                 delay = strtol(optarg, &c, 10);
683                                 if (!optarg[0] || *c || delay<1) {
684                                         fprintf(stderr, Name ": invalid delay: %s\n",
685                                                 optarg);
686                                         exit(2);
687                                 }
688                         }
689                         continue;
690                 case O(MONITOR,'f'): /* daemonise */
691                         daemonise = 1;
692                         continue;
693                 case O(MONITOR,'i'): /* pid */
694                         if (pidfile)
695                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
696                                         optarg);
697                         else
698                                 pidfile = optarg;
699                         continue;
700                 case O(MONITOR,'1'): /* oneshot */
701                         oneshot = 1;
702                         continue;
703                 case O(MONITOR,'t'): /* test */
704                         test = 1;
705                         continue;
706                 case O(MONITOR,'y'): /* log messages to syslog */
707                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
708                         dosyslog = 1;
709                         continue;
710
711                         /* now the general management options.  Some are applicable
712                          * to other modes. None have arguments.
713                          */
714                 case O(GROW,'a'):
715                 case O(MANAGE,'a'): /* add a drive */
716                         devmode = 'a';
717                         re_add = 0;
718                         continue;
719                 case O(MANAGE,ReAdd):
720                         devmode = 'a';
721                         re_add = 1;
722                         continue;
723                 case O(MANAGE,'r'): /* remove a drive */
724                         devmode = 'r';
725                         continue;
726                 case O(MANAGE,'f'): /* set faulty */
727                         devmode = 'f';
728                         continue;
729                 case O(INCREMENTAL,'R'):
730                 case O(MANAGE,'R'):
731                 case O(ASSEMBLE,'R'):
732                 case O(BUILD,'R'):
733                 case O(CREATE,'R'): /* Run the array */
734                         if (runstop < 0) {
735                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
736                                 exit(2);
737                         }
738                         runstop = 1;
739                         continue;
740                 case O(MANAGE,'S'):
741                         if (runstop > 0) {
742                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
743                                 exit(2);
744                         }
745                         runstop = -1;
746                         continue;
747
748                 case O(MANAGE,'o'):
749                         if (readonly < 0) {
750                                 fprintf(stderr, Name ": Cannot have both readonly and readwrite\n");
751                                 exit(2);
752                         }
753                         readonly = 1;
754                         continue;
755                 case O(MANAGE,'w'):
756                         if (readonly > 0) {
757                                 fprintf(stderr, Name ": Cannot have both readwrite and readonly.\n");
758                                 exit(2);
759                         }
760                         readonly = -1;
761                         continue;
762
763                 case O(MISC,'Q'):
764                 case O(MISC,'D'):
765                 case O(MISC,'E'):
766                 case O(MISC,'K'):
767                 case O(MISC,'R'):
768                 case O(MISC,'S'):
769                 case O(MISC,'X'):
770                 case O(MISC,'o'):
771                 case O(MISC,'w'):
772                 case O(MISC,'W'):
773                         if (devmode && devmode != opt &&
774                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
775                                 fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
776                                         devmode =='E'?opt:devmode);
777                                 exit(2);
778                         }
779                         devmode = opt;
780                         continue;
781                 case O(MISC,'t'):
782                         test = 1;
783                         continue;
784
785                 case O(MISC, Sparc22):
786                         if (devmode != 'E') {
787                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
788                                 exit(2);
789                         }
790                         SparcAdjust = 1;
791                         continue;
792
793                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
794                         if (!optarg) {
795                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
796                                 exit(2);
797                         }
798                         if (strcmp(optarg, "internal")==0) {
799                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
800                                 continue;
801                         }
802                         bitmap_fd = open(optarg, O_RDWR);
803                         if (!*optarg || bitmap_fd < 0) {
804                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
805                                 exit(2);
806                         }
807                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
808                         continue;
809
810                 case O(ASSEMBLE, BackupFile):
811                 case O(GROW, BackupFile):
812                         /* Specify a file into which grow might place a backup,
813                          * or from which assemble might recover a backup
814                          */
815                         if (backup_file) {
816                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
817                                 exit(2);
818                         }
819                         backup_file = optarg;
820                         continue;
821
822                 case O(BUILD,'b'):
823                 case O(CREATE,'b'): /* here we create the bitmap */
824                         if (strcmp(optarg, "none") == 0) {
825                                 fprintf(stderr, Name ": '--bitmap none' only"
826                                         " support for --grow\n");
827                                 exit(2);
828                         }
829                         /* FALL THROUGH */
830                 case O(GROW,'b'):
831                         if (strcmp(optarg, "internal")== 0 ||
832                             strcmp(optarg, "none")== 0 ||
833                             strchr(optarg, '/') != NULL) {
834                                 bitmap_file = optarg;
835                                 continue;
836                         }
837                         /* probable typo */
838                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n");
839                         exit(2);
840
841                 case O(GROW,BitmapChunk):
842                 case O(BUILD,BitmapChunk):
843                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
844                         bitmap_chunk = strtol(optarg, &c, 10);
845                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
846                                         bitmap_chunk & (bitmap_chunk - 1)) {
847                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
848                                                 optarg);
849                                 exit(2);
850                         }
851                         /* convert K to B, chunk of 0K means 512B */
852                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
853                         continue;
854
855                 case O(GROW, WriteBehind):
856                 case O(BUILD, WriteBehind):
857                 case O(CREATE, WriteBehind): /* write-behind mode */
858                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
859                         if (optarg) {
860                                 write_behind = strtol(optarg, &c, 10);
861                                 if (write_behind < 0 || *c ||
862                                     write_behind > 16383) {
863                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
864                                         exit(2);
865                                 }
866                         }
867                         continue;
868
869                 case O(INCREMENTAL, 'r'):
870                         rebuild_map = 1;
871                         continue;
872                 }
873                 /* We have now processed all the valid options. Anything else is
874                  * an error
875                  */
876                 if (option_index > 0)
877                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
878                                 long_options[option_index].name,
879                                 map_num(modes, mode));
880                 else
881                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
882                                 opt, map_num(modes, mode));
883                 exit(2);
884
885         }
886
887         if (print_help) {
888                 char *help_text = Help;
889                 if (print_help == 2)
890                         help_text = OptionHelp;
891                 else
892                         switch (mode) {
893                         case ASSEMBLE : help_text = Help_assemble; break;
894                         case BUILD    : help_text = Help_build; break;
895                         case CREATE   : help_text = Help_create; break;
896                         case MANAGE   : help_text = Help_manage; break;
897                         case MISC     : help_text = Help_misc; break;
898                         case MONITOR  : help_text = Help_monitor; break;
899                         case GROW     : help_text = Help_grow; break;
900                         case INCREMENTAL:help_text= Help_incr; break;
901                         }
902                 fputs(help_text,stdout);
903                 exit(0);
904         }
905
906         if (!mode && devs_found) {
907                 mode = MISC;
908                 devmode = 'Q';
909                 if (devlist->disposition == 0)
910                         devlist->disposition = devmode;
911         }
912         if (!mode) {
913                 fputs(Usage, stderr);
914                 exit(2);
915         }
916
917         if (symlinks) {
918                 struct createinfo *ci = conf_get_create_info();
919
920                 if (strcasecmp(symlinks, "yes") == 0)
921                         ci->symlinks = 1;
922                 else if (strcasecmp(symlinks, "no") == 0)
923                         ci->symlinks = 0;
924                 else {
925                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
926                         exit(2);
927                 }
928         }
929         /* Ok, got the option parsing out of the way
930          * hopefully it's mostly right but there might be some stuff
931          * missing
932          *
933          * That is mosty checked in the per-mode stuff but...
934          *
935          * For @,B,C  and A without -s, the first device listed must be an md device
936          * we check that here and open it.
937          */
938
939         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
940             (mode == ASSEMBLE && ! scan)) {
941                 if (devs_found < 1) {
942                         fprintf(stderr, Name ": an md device must be given in this mode\n");
943                         exit(2);
944                 }
945                 if ((int)ident.super_minor == -2 && autof) {
946                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
947                         exit(2);
948                 }
949                 if (mode == MANAGE || mode == GROW)
950                         autof=1; /* Don't create */
951                 mdfd = open_mddev(devlist->devname, autof);
952                 if (mdfd < 0)
953                         exit(1);
954                 if ((int)ident.super_minor == -2) {
955                         struct stat stb;
956                         fstat(mdfd, &stb);
957                         ident.super_minor = minor(stb.st_rdev);
958                 }
959         }
960
961         if (raiddisks) {
962                 if (raiddisks > max_disks) {
963                         fprintf(stderr, Name ": invalid number of raid devices: %d\n",
964                                 raiddisks);
965                         exit(2);
966                 }
967                 if (raiddisks == 1 &&  !force && level != -5) {
968                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
969                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
970                                 "     setting the number of drives.\n");
971                         exit(2);
972                 }
973         }
974         if (sparedisks) {
975                 if ( sparedisks > max_disks - raiddisks) {
976                         fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
977                                 sparedisks);
978                         exit(2);
979                 }
980         }
981
982         if (homehost == NULL)
983                 homehost = conf_get_homehost();
984         if (homehost && strcmp(homehost, "<system>")==0) {
985                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
986                         sys_hostname[sizeof(sys_hostname)-1] = 0;
987                         homehost = sys_hostname;
988                 }
989         }
990
991         rv = 0;
992         switch(mode) {
993         case MANAGE:
994                 /* readonly, add/remove, readwrite, runstop */
995                 if (readonly>0)
996                         rv = Manage_ro(devlist->devname, mdfd, readonly);
997                 if (!rv && devs_found>1)
998                         rv = Manage_subdevs(devlist->devname, mdfd,
999                                             devlist->next, verbose-quiet);
1000                 if (!rv && readonly < 0)
1001                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1002                 if (!rv && runstop)
1003                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1004                 break;
1005         case ASSEMBLE:
1006                 if (devs_found == 1 && ident.uuid_set == 0 &&
1007                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1008                         /* Only a device has been given, so get details from config file */
1009                         mddev_ident_t array_ident = conf_get_ident(devlist->devname);
1010                         if (array_ident == NULL) {
1011                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1012                                         devlist->devname);
1013                                 rv |= 1;
1014                         } else {
1015                                 mdfd = open_mddev(devlist->devname,
1016                                                   array_ident->autof ? array_ident->autof : autof);
1017                                 if (mdfd < 0)
1018                                         rv |= 1;
1019                                 else {
1020                                         rv |= Assemble(ss, devlist->devname, mdfd, array_ident,
1021                                                        NULL, backup_file,
1022                                                        readonly, runstop, update, homehost, verbose-quiet, force);
1023                                         close(mdfd);
1024                                 }
1025                         }
1026                 } else if (!scan)
1027                         rv = Assemble(ss, devlist->devname, mdfd, &ident,
1028                                       devlist->next, backup_file,
1029                                       readonly, runstop, update, homehost, verbose-quiet, force);
1030                 else if (devs_found>0) {
1031                         if (update && devs_found > 1) {
1032                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1033                                 exit(1);
1034                         }
1035                         if (backup_file && devs_found > 1) {
1036                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1037                                 exit(1);
1038                         }
1039                         for (dv = devlist ; dv ; dv=dv->next) {
1040                                 mddev_ident_t array_ident = conf_get_ident(dv->devname);
1041                                 if (array_ident == NULL) {
1042                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1043                                                 dv->devname);
1044                                         rv |= 1;
1045                                         continue;
1046                                 }
1047                                 mdfd = open_mddev(dv->devname,
1048                                                   array_ident->autof ?array_ident->autof : autof);
1049                                 if (mdfd < 0) {
1050                                         rv |= 1;
1051                                         continue;
1052                                 }
1053                                 rv |= Assemble(ss, dv->devname, mdfd, array_ident,
1054                                                NULL, backup_file,
1055                                                readonly, runstop, update, homehost, verbose-quiet, force);
1056                                 close(mdfd);
1057                         }
1058                 } else {
1059                         mddev_ident_t array_list =  conf_get_ident(NULL);
1060                         mddev_dev_t devlist = conf_get_devs();
1061                         int cnt = 0;
1062                         if (devlist == NULL) {
1063                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1064                                 exit(1);
1065                         }
1066                         if (update) {
1067                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1068                                 exit(1);
1069                         }
1070                         if (backup_file) {
1071                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1072                                 exit(1);
1073                         }
1074                         for (; array_list; array_list = array_list->next) {
1075                                 mdu_array_info_t array;
1076                                 mdfd = open_mddev(array_list->devname,
1077                                                   array_list->autof ? array_list->autof : autof);
1078                                 if (mdfd < 0) {
1079                                         rv |= 1;
1080                                         continue;
1081                                 }
1082                                 if (ioctl(mdfd, GET_ARRAY_INFO, &array)>=0)
1083                                         /* already assembled, skip */
1084                                         cnt++;
1085                                 else {
1086                                         rv |= Assemble(ss, array_list->devname, mdfd,
1087                                                        array_list,
1088                                                        NULL, NULL,
1089                                                        readonly, runstop, NULL, homehost, verbose-quiet, force);
1090                                         if (rv == 0) cnt++;
1091                                 }
1092                                 close(mdfd);
1093                         }
1094                         if (homehost) {
1095                                 /* Maybe we can auto-assemble something.
1096                                  * Repeatedly call Assemble in auto-assmble mode
1097                                  * until it fails
1098                                  */
1099                                 int rv2;
1100                                 int acnt;
1101                                 ident.autof = autof;
1102                                 do {
1103                                         mddev_dev_t devlist = conf_get_devs();
1104                                         acnt = 0;
1105                                         do {
1106                                                 rv2 = Assemble(ss, NULL, -1,
1107                                                                &ident,
1108                                                                devlist, NULL,
1109                                                                readonly, runstop, NULL, homehost, verbose-quiet, force);
1110                                                 if (rv2==0) {
1111                                                         cnt++;
1112                                                         acnt++;
1113                                                 }
1114                                                 if (rv2 == 1)
1115                                                         /* found something so even though assembly failed  we
1116                                                          * want to avoid auto-updates
1117                                                          */
1118                                                         auto_update_home = 0;
1119                                         } while (rv2!=2);
1120                                         /* Incase there are stacked devices, we need to go around again */
1121                                 } while (acnt);
1122                                 if (cnt == 0 && auto_update_home && homehost) {
1123                                         /* Nothing found, maybe we need to bootstrap homehost info */
1124                                         do {
1125                                                 acnt = 0;
1126                                                 do {
1127                                                         rv2 = Assemble(ss, NULL, -1,
1128                                                                        &ident,
1129                                                                        NULL, NULL,
1130                                                                        readonly, runstop, "homehost", homehost, verbose-quiet, force);
1131                                                         if (rv2==0) {
1132                                                                 cnt++;
1133                                                                 acnt++;
1134                                                         }
1135                                                 } while (rv2!=2);
1136                                                 /* Incase there are stacked devices, we need to go around again */
1137                                         } while (acnt);
1138                                 }
1139                                 if (cnt == 0 && rv == 0) {
1140                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1141                                         rv = 1;
1142                                 } else if (cnt)
1143                                         rv = 0;
1144                         } else if (cnt == 0 && rv == 0) {
1145                                 fprintf(stderr, Name ": No arrays found in config file\n");
1146                                 rv = 1;
1147                         }
1148                 }
1149                 break;
1150         case BUILD:
1151                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1152                 if (write_behind && !bitmap_file) {
1153                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1154                         rv = 1;
1155                         break;
1156                 }
1157                 if (raiddisks == 0) {
1158                         fprintf(stderr, Name ": no raid-disks specified.\n");
1159                         rv = 1;
1160                         break;
1161                 }
1162
1163                 if (bitmap_file) {
1164                         if (strcmp(bitmap_file, "internal")==0) {
1165                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1166                                 rv |= 1;
1167                                 break;
1168                         }
1169                 }
1170                 rv = Build(devlist->devname, mdfd, chunk, level, layout,
1171                            raiddisks, devlist->next, assume_clean,
1172                            bitmap_file, bitmap_chunk, write_behind, delay, verbose-quiet);
1173                 break;
1174         case CREATE:
1175                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1176                 if (write_behind && !bitmap_file) {
1177                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1178                         rv = 1;
1179                         break;
1180                 }
1181                 if (raiddisks == 0) {
1182                         fprintf(stderr, Name ": no raid-disks specified.\n");
1183                         rv = 1;
1184                         break;
1185                 }
1186
1187                 rv = Create(ss, devlist->devname, mdfd, chunk, level, layout, size<0 ? 0 : size,
1188                             raiddisks, sparedisks, ident.name, homehost,
1189                             ident.uuid_set ? ident.uuid : NULL,
1190                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1191                             bitmap_file, bitmap_chunk, write_behind, delay);
1192                 break;
1193         case MISC:
1194                 if (devmode == 'E') {
1195                         if (devlist == NULL && !scan) {
1196                                 fprintf(stderr, Name ": No devices to examine\n");
1197                                 exit(2);
1198                         }
1199                         if (devlist == NULL)
1200                                 devlist = conf_get_devs();
1201                         if (devlist == NULL) {
1202                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1203                                 exit(1);
1204                         }
1205                         if (brief && verbose)
1206                                 brief = 2;
1207                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1208                                      export, scan,
1209                                      SparcAdjust, ss, homehost);
1210                 } else {
1211                         if (devlist == NULL) {
1212                                 if (devmode=='D' && scan) {
1213                                         /* apply --detail to all devices in /proc/mdstat */
1214                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1215                                         struct mdstat_ent *e;
1216                                         for (e=ms ; e ; e=e->next) {
1217                                                 char *name = get_md_name(e->devnum);
1218
1219                                                 if (!name) {
1220                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1221                                                                 e->dev);
1222                                                         continue;
1223                                                 }
1224                                                 rv |= Detail(name, verbose>1?0:verbose+1,
1225                                                              export, test, homehost);
1226                                                 put_md_name(name);
1227                                         }
1228                                 } else  if (devmode == 'S' && scan) {
1229                                         /* apply --stop to all devices in /proc/mdstat */
1230                                         /* Due to possible stacking of devices, repeat until
1231                                          * nothing more can be stopped
1232                                          */
1233                                         int progress=1, err;
1234                                         int last = 0;
1235                                         do {
1236                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1237                                                 struct mdstat_ent *e;
1238
1239                                                 if (!progress) last = 1;
1240                                                 progress = 0; err = 0;
1241                                                 for (e=ms ; e ; e=e->next) {
1242                                                         char *name = get_md_name(e->devnum);
1243
1244                                                         if (!name) {
1245                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1246                                                                         e->dev);
1247                                                                 continue;
1248                                                         }
1249                                                         mdfd = open_mddev(name, 1);
1250                                                         if (mdfd >= 0) {
1251                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1252                                                                         err = 1;
1253                                                                 else
1254                                                                         progress = 1;
1255                                                                 close(mdfd);
1256                                                         }
1257
1258                                                         put_md_name(name);
1259                                                 }
1260                                         } while (!last && err);
1261                                         if (err) rv |= 1;
1262                                 } else {
1263                                         fprintf(stderr, Name ": No devices given.\n");
1264                                         exit(2);
1265                                 }
1266                         }
1267                         for (dv=devlist ; dv; dv=dv->next) {
1268                                 switch(dv->disposition) {
1269                                 case 'D':
1270                                         rv |= Detail(dv->devname,
1271                                                      brief?1+verbose:0,
1272                                                      export, test, homehost);
1273                                         continue;
1274                                 case 'K': /* Zero superblock */
1275                                         rv |= Kill(dv->devname, force, quiet,0);
1276                                         continue;
1277                                 case 'Q':
1278                                         rv |= Query(dv->devname); continue;
1279                                 case 'X':
1280                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1281                                 case 'W':
1282                                         rv |= Wait(dv->devname); continue;
1283                                 }
1284                                 mdfd = open_mddev(dv->devname, 1);
1285                                 if (mdfd>=0) {
1286                                         switch(dv->disposition) {
1287                                         case 'R':
1288                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1289                                         case 'S':
1290                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1291                                         case 'o':
1292                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1293                                         case 'w':
1294                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1295                                         }
1296                                         close(mdfd);
1297                                 } else
1298                                         rv |= 1;
1299                         }
1300                 }
1301                 break;
1302         case MONITOR:
1303                 if (!devlist && !scan) {
1304                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1305                         rv = 1;
1306                         break;
1307                 }
1308                 if (pidfile && !daemonise) {
1309                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1310                         rv = 1;
1311                         break;
1312                 }
1313                 rv= Monitor(devlist, mailaddr, program,
1314                             delay?delay:60, daemonise, scan, oneshot,
1315                             dosyslog, test, pidfile);
1316                 break;
1317
1318         case GROW:
1319                 if (devs_found > 1) {
1320
1321                         /* must be '-a'. */
1322                         if (size >= 0 || raiddisks) {
1323                                 fprintf(stderr, Name ": --size, --raiddisks, and --add are exclusing in --grow mode\n");
1324                                 rv = 1;
1325                                 break;
1326                         }
1327                         for (dv=devlist->next; dv ; dv=dv->next) {
1328                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1329                                 if (rv)
1330                                         break;
1331                         }
1332                 } else if ((size >= 0) + (raiddisks != 0) +  (layout != UnSet) + (bitmap_file != NULL)> 1) {
1333                         fprintf(stderr, Name ": can change at most one of size, raiddisks, bitmap, and layout\n");
1334                         rv = 1;
1335                         break;
1336                 } else if (layout != UnSet)
1337                         rv = Manage_reconfig(devlist->devname, mdfd, layout);
1338                 else if (size >= 0 || raiddisks)
1339                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1340                                           size, level, layout, chunk, raiddisks);
1341                 else if (bitmap_file) {
1342                         if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1343                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1344                                             bitmap_chunk, delay, write_behind, force);
1345                 } else
1346                         fprintf(stderr, Name ": no changes to --grow\n");
1347                 break;
1348         case INCREMENTAL:
1349                 if (rebuild_map) {
1350                         RebuildMap();
1351                 }
1352                 if (scan) {
1353                         if (runstop <= 0) {
1354                                 fprintf(stderr, Name
1355                          ": --incremental --scan meaningless without --run.\n");
1356                                 break;
1357                         }
1358                         rv = IncrementalScan(verbose);
1359                 }
1360                 if (!devlist) {
1361                         if (!rebuild_map && !scan) {
1362                                 fprintf(stderr, Name
1363                                         ": --incremental requires a device.\n");
1364                                 rv = 1;
1365                         }
1366                         break;
1367                 }
1368                 if (devlist->next) {
1369                         fprintf(stderr, Name
1370                                ": --incremental can only handle one device.\n");
1371                         rv = 1;
1372                         break;
1373                 }
1374                 rv = Incremental(devlist->devname, verbose-quiet, runstop,
1375                                  ss, homehost, autof);
1376                 break;
1377         case AUTODETECT:
1378                 autodetect();
1379                 break;
1380         }
1381         exit(rv);
1382 }