2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
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.
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.
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
22 * Email: <neilb@cse.unsw.edu.au>
24 * School of Computer Science and Engineering
25 * The University of New South Wales
33 int open_mddev(char *dev
)
35 int mdfd
= open(dev
, O_RDWR
, 0);
37 fprintf(stderr
, Name
": error opening %s: %s\n",
38 dev
, strerror(errno
));
39 else if (md_get_version(mdfd
) <= 0) {
40 fprintf(stderr
, Name
": %s does not appear to be an md device\n",
50 int main(int argc
, char *argv
[])
65 struct mddev_ident_s ident
;
66 char *configfile
= NULL
;
74 mddev_dev_t devlist
= NULL
;
75 mddev_dev_t
*devlistend
= & devlist
;
83 char *mailaddr
= NULL
;
93 ident
.raid_disks
= UnSet
;
94 ident
.super_minor
= UnSet
;
97 while ((option_index
= -1) ,
98 (opt
=getopt_long(argc
, argv
,
99 short_options
, long_options
,
100 &option_index
)) != -1) {
102 /* firstly, so mode-independant options */
106 if (option_index
> 0 &&
107 strcmp(long_options
[option_index
].name
, "help-options")==0)
108 help_text
= OptionHelp
;
111 case ASSEMBLE
: help_text
= Help_assemble
; break;
112 case BUILD
: help_text
= Help_build
; break;
113 case CREATE
: help_text
= Help_create
; break;
114 case MANAGE
: help_text
= Help_manage
; break;
115 case MISC
: help_text
= Help_misc
; break;
116 case MONITOR
: help_text
= Help_monitor
; break;
118 fputs(help_text
,stderr
);
122 fputs(Version
, stderr
);
125 case 'v': verbose
= 1;
133 fputs(Usage
, stderr
);
136 /* second, figure out the mode.
137 * Some options force the mode. Others
138 * set the mode if it isn't already
142 case '@': /* just incase they say --manage */
143 newmode
= MANAGE
; break;
147 case 1 : if (!mode
) newmode
= MANAGE
; break;
149 case 'A': newmode
= ASSEMBLE
; break;
150 case 'B': newmode
= BUILD
; break;
151 case 'C': newmode
= CREATE
; break;
152 case 'F': newmode
= MONITOR
;break;
157 case 'Q': newmode
= MISC
; break;
162 case 'K': if (!mode
) newmode
= MISC
; break;
164 if (mode
&& newmode
== mode
) {
165 /* everybody happy ! */
166 } else if (mode
&& newmode
!= mode
) {
168 fprintf(stderr
, Name
": ");
169 if (option_index
>= 0)
170 fprintf(stderr
, "--%s", long_options
[option_index
].name
);
172 fprintf(stderr
, "-%c", opt
);
173 fprintf(stderr
, " would set mode to %s, but it is already %s.\n",
174 map_num(modes
, newmode
),
175 map_num(modes
, mode
));
177 } else if (!mode
&& newmode
) {
180 /* special case of -c --help */
182 ( strncmp(optarg
, "--h", 3)==0 ||
183 strncmp(optarg
, "-h", 2)==0)) {
184 fputs(Help_config
, stderr
);
187 if (option_index
>= 0)
188 fprintf(stderr
, "--%s", long_options
[option_index
].name
);
190 fprintf(stderr
, "-%c", opt
);
191 fprintf(stderr
, " does not set the mode, and so cannot be first.\n");
195 /* if we just set the mode, then done */
206 /* an undecorated option - must be a device name.
208 if (devs_found
> 0 && mode
== '@' && !devmode
) {
209 fprintf(stderr
, Name
": Must give on of -a/-r/-f for subsequent devices at %s\n", optarg
);
212 dv
= malloc(sizeof(*dv
));
214 fprintf(stderr
, Name
": malloc failed\n");
217 dv
->devname
= optarg
;
218 dv
->disposition
= devmode
;
221 devlistend
= &dv
->next
;
227 /* We've got a mode, and opt is now something else which
228 * could depend on the mode */
229 #define O(a,b) ((a<<8)|b)
230 switch (O(mode
,opt
)) {
232 case O(BUILD
,'c'): /* chunk or rounding */
234 fprintf(stderr
, Name
": chunk/rounding may only be specified once. "
235 "Second value is %s.\n", optarg
);
238 chunk
= strtol(optarg
, &c
, 10);
239 if (!optarg
[0] || *c
|| chunk
<4 || ((chunk
-1)&chunk
)) {
240 fprintf(stderr
, Name
": invalid chunk/rounding value: %s\n",
246 case O(CREATE
,'z'): /* size */
248 fprintf(stderr
, Name
": size may only be specified once. "
249 "Second value is %s.\n", optarg
);
252 size
= strtol(optarg
, &c
, 10);
253 if (!optarg
[0] || *c
|| size
< 4) {
254 fprintf(stderr
, Name
": invalid size: %s\n",
261 case O(BUILD
,'l'): /* set raid level*/
262 if (level
!= UnSet
) {
263 fprintf(stderr
, Name
": raid level may only be set once. "
264 "Second value is %s.\n", optarg
);
267 level
= map_name(pers
, optarg
);
268 if (level
== UnSet
) {
269 fprintf(stderr
, Name
": invalid raid level: %s\n",
273 if (level
!= 0 && level
!= -1 && mode
== BUILD
) {
274 fprintf(stderr
, Name
": Raid level %s not permitted with --build.\n",
278 if (sparedisks
> 0 && level
< 1 && level
>= -1) {
279 fprintf(stderr
, Name
": raid level %s is incompatible with spare-devices setting.\n",
286 case O(CREATE
,'p'): /* raid5 layout */
288 fprintf(stderr
,Name
": layout may only be sent once. "
289 "Second value was %s\n", optarg
);
294 fprintf(stderr
, Name
": layout not meaningful for %s arrays.\n",
295 map_num(pers
, level
));
298 fprintf(stderr
, Name
": raid level must be given before layout.\n");
303 layout
= map_name(r5layout
, optarg
);
305 fprintf(stderr
, Name
": layout %s not understood for raid5.\n",
314 case O(BUILD
,'n'): /* number of raid disks */
316 fprintf(stderr
, Name
": raid-devices set twice: %d and %s\n",
320 raiddisks
= strtol(optarg
, &c
, 10);
321 if (!optarg
[0] || *c
|| raiddisks
<=0 || raiddisks
> MD_SB_DISKS
) {
322 fprintf(stderr
, Name
": invalid number of raid devices: %s\n",
326 if (raiddisks
== 1 && !force
) {
327 fprintf(stderr
, Name
": '1' is an unusual number of drives for an array, so it is probably\n"
328 " a mistake. If you really mean it you will need to specify --force before\n"
329 " setting the number of drives.\n");
332 ident
.raid_disks
= raiddisks
;
335 case O(CREATE
,'x'): /* number of spare (eXtra) discs */
337 fprintf(stderr
,Name
": spare-devices set twice: %d and %s\n",
341 if (level
!= UnSet
&& level
<= 0 && level
>= -1) {
342 fprintf(stderr
, Name
": spare-devices setting is incompatible with raid level %d\n",
346 sparedisks
= strtol(optarg
, &c
, 10);
347 if (!optarg
[0] || *c
|| sparedisks
< 0 || sparedisks
> MD_SB_DISKS
- raiddisks
) {
348 fprintf(stderr
, Name
": invalid number of spare-devices: %s\n",
353 case O(BUILD
,'f'): /* force honouring '-n 1' */
354 case O(CREATE
,'f'): /* force honouring of device list */
355 case O(ASSEMBLE
,'f'): /* force assembly */
356 case O(MISC
,'f'): /* force zero */
360 /* now for the Assemble options */
361 case O(ASSEMBLE
,'u'): /* uuid of array */
362 if (ident
.uuid_set
) {
363 fprintf(stderr
, Name
": uuid cannot be set twice. "
364 "Second value %s.\n", optarg
);
367 if (parse_uuid(optarg
, ident
.uuid
))
370 fprintf(stderr
,Name
": Bad uuid: %s\n", optarg
);
375 case O(ASSEMBLE
,'m'): /* super-minor for array */
376 if (ident
.super_minor
!= UnSet
) {
377 fprintf(stderr
, Name
": super-minor cannot be set twice. "
378 "Second value: %s.\n", optarg
);
381 if (strcmp(optarg
, "dev")==0)
382 ident
.super_minor
= -2;
384 ident
.super_minor
= strtoul(optarg
, &cp
, 10);
385 if (!optarg
[0] || *cp
) {
386 fprintf(stderr
, Name
": Bad super-minor number: %s.\n", optarg
);
392 case O(ASSEMBLE
,'U'): /* update the superblock */
394 fprintf(stderr
, Name
": Can only update one aspect of superblock, both %s and %s given.\n",
399 if (strcmp(update
, "sparc2.2")==0) continue;
400 if (strcmp(update
, "super-minor") == 0)
402 if (strcmp(update
, "summaries")==0)
404 fprintf(stderr
, Name
": '--update %s' invalid. Only 'sparc2.2', 'super-minor' or 'summaries' supported\n",update
);
407 case O(ASSEMBLE
,'c'): /* config file */
411 fprintf(stderr
, Name
": configfile cannot be set twice. "
412 "Second value is %s.\n", optarg
);
416 /* FIXME possibly check that config file exists. Even parse it */
418 case O(ASSEMBLE
,'s'): /* scan */
424 case O(MONITOR
,'m'): /* mail address */
426 fprintf(stderr
, Name
": only specify one mailaddress. %s ignored.\n",
432 case O(MONITOR
,'p'): /* alert program */
434 fprintf(stderr
, Name
": only specify one alter program. %s ignored.\n",
440 case O(MONITOR
,'d'): /* delay in seconds */
442 fprintf(stderr
, Name
": only specify delay once. %s ignored.\n",
445 delay
= strtol(optarg
, &c
, 10);
446 if (!optarg
[0] || *c
|| delay
<1) {
447 fprintf(stderr
, Name
": invalid delay: %s\n",
453 case O(MONITOR
,'f'): /* daemonise */
456 case O(MONITOR
,'1'): /* oneshot */
459 case O(MONITOR
,'t'): /* test */
463 /* now the general management options. Some are applicable
464 * to other modes. None have arguments.
469 case O(ASSEMBLE
,'a'): /* add a drive */
472 case O(MANAGE
,'r'): /* remove a drive */
475 case O(MANAGE
,'f'): /* set faulty */
479 case O(ASSEMBLE
,'R'):
481 case O(CREATE
,'R'): /* Run the array */
483 fprintf(stderr
, Name
": Cannot both Stop and Run an array\n");
490 fprintf(stderr
, Name
": Cannot both Run and Stop an array\n");
498 fprintf(stderr
, Name
": Cannot have both readonly and readwrite\n");
505 fprintf(stderr
, Name
": Cannot have both readwrite and readonly.\n");
519 if (devmode
&& devmode
!= opt
&&
520 (devmode
== 'E' || (opt
== 'E' && devmode
!= 'Q'))) {
521 fprintf(stderr
, Name
": --examine/-E cannot be given with -%c\n",
522 devmode
=='E'?opt
:devmode
);
532 if (devmode
!= 'E') {
533 fprintf(stderr
, Name
": --sparc2.2 only allowed with --examine\n");
539 /* We have now processed all the valid options. Anything else is
542 fprintf(stderr
, Name
": option %c not valid in %s mode\n",
543 opt
, map_num(modes
, mode
));
549 fputs(Usage
, stderr
);
552 /* Ok, got the option parsing out of the way
553 * hopefully it's mostly right but there might be some stuff
556 * That is mosty checked in the per-mode stuff but...
558 * For @,B,C and A without -s, the first device listed must be an md device
559 * we check that here and open it.
562 if (mode
==MANAGE
|| mode
== BUILD
|| mode
== CREATE
|| (mode
== ASSEMBLE
&& ! scan
)) {
563 if (devs_found
< 1) {
564 fprintf(stderr
, Name
": an md device must be given in this mode\n");
567 mdfd
= open_mddev(devlist
->devname
);
570 if ((int)ident
.super_minor
== -2) {
573 ident
.super_minor
= MINOR(stb
.st_rdev
);
580 /* readonly, add/remove, readwrite, runstop */
582 rv
= Manage_ro(devlist
->devname
, mdfd
, readonly
);
583 if (!rv
&& devs_found
>1)
584 rv
= Manage_subdevs(devlist
->devname
, mdfd
,
586 if (!rv
&& readonly
< 0)
587 rv
= Manage_ro(devlist
->devname
, mdfd
, readonly
);
589 rv
= Manage_runstop(devlist
->devname
, mdfd
, runstop
);
592 if (devs_found
== 1 && ident
.uuid_set
== 0 &&
593 ident
.super_minor
== UnSet
&& !scan
) {
594 /* Only a device has been given, so get details from config file */
595 mddev_ident_t array_ident
= conf_get_ident(configfile
, devlist
->devname
);
596 mdfd
= open_mddev(devlist
->devname
);
600 if (array_ident
== NULL
) {
601 fprintf(stderr
, Name
": %s not identified in config file.\n",
606 rv
|= Assemble(devlist
->devname
, mdfd
, array_ident
, configfile
,
608 readonly
, runstop
, update
, verbose
, force
);
611 rv
= Assemble(devlist
->devname
, mdfd
, &ident
, configfile
,
613 readonly
, runstop
, update
, verbose
, force
);
614 else if (devs_found
>0) {
615 if (update
&& devs_found
> 1) {
616 fprintf(stderr
, Name
": can only update a single array at a time\n");
619 for (dv
= devlist
; dv
; dv
=dv
->next
) {
620 mddev_ident_t array_ident
= conf_get_ident(configfile
, dv
->devname
);
621 mdfd
= open_mddev(dv
->devname
);
626 if (array_ident
== NULL
) {
627 fprintf(stderr
, Name
": %s not identified in config file.\n",
632 rv
|= Assemble(dv
->devname
, mdfd
, array_ident
, configfile
,
634 readonly
, runstop
, update
, verbose
, force
);
637 mddev_ident_t array_list
= conf_get_ident(configfile
, NULL
);
639 fprintf(stderr
, Name
": No arrays found in config file\n");
642 for (; array_list
; array_list
= array_list
->next
) {
643 mdu_array_info_t array
;
644 mdfd
= open_mddev(array_list
->devname
);
649 if (ioctl(mdfd
, GET_ARRAY_INFO
, &array
)>=0)
650 /* already assembled, skip */
652 rv
|= Assemble(array_list
->devname
, mdfd
,
653 array_list
, configfile
,
655 readonly
, runstop
, NULL
, verbose
, force
);
660 rv
= Build(devlist
->devname
, mdfd
, chunk
, level
, raiddisks
, devlist
->next
);
663 rv
= Create(devlist
->devname
, mdfd
, chunk
, level
, layout
, size
,
664 raiddisks
, sparedisks
,
665 devs_found
-1, devlist
->next
, runstop
, verbose
, force
);
669 if (devmode
== 'E') {
670 if (devlist
== NULL
&& !scan
) {
671 fprintf(stderr
, Name
": No devices to examine\n");
675 devlist
= conf_get_devs(configfile
);
676 if (devlist
== NULL
) {
677 fprintf(stderr
, Name
": No devices listed in %s\n", configfile
?configfile
:DefaultConfFile
);
680 rv
= Examine(devlist
, scan
?!verbose
:brief
, scan
, SparcAdjust
);
682 if (devlist
== NULL
) {
683 if ((devmode
== 'S' ||devmode
=='D') && scan
) {
684 /* apply to all devices in /proc/mdstat */
685 struct mdstat_ent
*ms
= mdstat_read();
686 struct mdstat_ent
*e
;
687 for (e
=ms
; e
; e
=e
->next
) {
688 char *name
= get_md_name(e
->devnum
);
691 fprintf(stderr
, Name
": cannot find device file for %s\n",
696 rv
|= Detail(name
, !verbose
, test
);
697 else if (devmode
=='S') {
698 mdfd
= open_mddev(name
);
700 rv
|= Manage_runstop(name
, mdfd
, -1);
705 fprintf(stderr
, Name
": No devices given.\n");
709 for (dv
=devlist
; dv
; dv
=dv
->next
) {
710 switch(dv
->disposition
) {
712 rv
|= Detail(dv
->devname
, brief
, test
); continue;
713 case 'K': /* Zero superblock */
714 rv
|= Kill(dv
->devname
, force
); continue;
716 rv
|= Query(dv
->devname
); continue;
718 mdfd
= open_mddev(dv
->devname
);
720 switch(dv
->disposition
) {
722 rv
|= Manage_runstop(dv
->devname
, mdfd
, 1); break;
724 rv
|= Manage_runstop(dv
->devname
, mdfd
, -1); break;
726 rv
|= Manage_ro(dv
->devname
, mdfd
, 1); break;
728 rv
|= Manage_ro(dv
->devname
, mdfd
, -1); break;
734 if (!devlist
&& !scan
) {
735 fprintf(stderr
, Name
": Cannot monitor: need --scan or at least one device\n");
739 rv
= Monitor(devlist
, mailaddr
, program
,
740 delay
?delay
:60, daemonise
, scan
, oneshot
, configfile
, test
);