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
;
82 char *mailaddr
= NULL
;
91 ident
.raid_disks
= -1;
92 ident
.super_minor
= -1;
95 while ((option_index
= -1) ,
96 (opt
=getopt_long(argc
, argv
,
97 short_options
, long_options
,
98 &option_index
)) != -1) {
100 /* firstly, so mode-independant options */
105 case ASSEMBLE
: help_text
= Help_assemble
; break;
106 case BUILD
: help_text
= Help_build
; break;
107 case CREATE
: help_text
= Help_create
; break;
108 case MANAGE
: help_text
= Help_manage
; break;
109 case MISC
: help_text
= Help_misc
; break;
110 case MONITOR
: help_text
= Help_monitor
; break;
112 fputs(help_text
,stderr
);
116 fputs(Version
, stderr
);
119 case 'v': verbose
= 1;
127 fputs(Usage
, stderr
);
130 /* second, figure out the mode.
131 * Some options force the mode. Others
132 * set the mode if it isn't already
136 case '@': /* just incase they say --manage */
137 newmode
= MANAGE
; break;
141 case 1 : if (!mode
) newmode
= MANAGE
; break;
143 case 'A': newmode
= ASSEMBLE
; break;
144 case 'B': newmode
= BUILD
; break;
145 case 'C': newmode
= CREATE
; break;
146 case 'F': newmode
= MONITOR
;break;
151 case 'Q': newmode
= MISC
; break;
156 case 'K': if (!mode
) newmode
= MISC
; break;
158 if (mode
&& newmode
== mode
) {
159 /* everybody happy ! */
160 } else if (mode
&& newmode
!= mode
) {
162 fprintf(stderr
, Name
": ");
163 if (option_index
>= 0)
164 fprintf(stderr
, "--%s", long_options
[option_index
].name
);
166 fprintf(stderr
, "-%c", opt
);
167 fprintf(stderr
, " would set mode to %s, but it is already %s.\n",
168 map_num(modes
, newmode
),
169 map_num(modes
, mode
));
171 } else if (!mode
&& newmode
) {
174 /* special case of -c --help */
176 ( strncmp(optarg
, "--h", 3)==0 ||
177 strncmp(optarg
, "-h", 2)==0)) {
178 fputs(Help_config
, stderr
);
181 if (option_index
>= 0)
182 fprintf(stderr
, "--%s", long_options
[option_index
].name
);
184 fprintf(stderr
, "-%c", opt
);
185 fprintf(stderr
, " does not set the mode, and so cannot be first.\n");
189 /* if we just set the mode, then done */
200 /* an undecorated option - must be a device name.
202 if (devs_found
> 0 && mode
== '@' && !devmode
) {
203 fprintf(stderr
, Name
": Must give on of -a/-r/-f for subsequent devices at %s\n", optarg
);
206 dv
= malloc(sizeof(*dv
));
208 fprintf(stderr
, Name
": malloc failed\n");
211 dv
->devname
= optarg
;
212 dv
->disposition
= devmode
;
215 devlistend
= &dv
->next
;
221 /* We've got a mode, and opt is now something else which
222 * could depend on the mode */
223 #define O(a,b) ((a<<8)|b)
224 switch (O(mode
,opt
)) {
226 case O(BUILD
,'c'): /* chunk or rounding */
228 fprintf(stderr
, Name
": chunk/rounding may only be specified once. "
229 "Second value is %s.\n", optarg
);
232 chunk
= strtol(optarg
, &c
, 10);
233 if (!optarg
[0] || *c
|| chunk
<4 || ((chunk
-1)&chunk
)) {
234 fprintf(stderr
, Name
": invalid chunk/rounding value: %s\n",
240 case O(CREATE
,'z'): /* size */
242 fprintf(stderr
, Name
": size may only be specified once. "
243 "Second value is %s.\n", optarg
);
246 size
= strtol(optarg
, &c
, 10);
247 if (!optarg
[0] || *c
|| size
< 4) {
248 fprintf(stderr
, Name
": invalid size: %s\n",
255 case O(BUILD
,'l'): /* set raid level*/
257 fprintf(stderr
, Name
": raid level may only be set once. "
258 "Second value is %s.\n", optarg
);
261 level
= map_name(pers
, optarg
);
263 fprintf(stderr
, Name
": invalid raid level: %s\n",
267 if (level
!= 0 && level
!= -1 && mode
== BUILD
) {
268 fprintf(stderr
, Name
": Raid level %s not permitted with --build.\n",
272 if (sparedisks
> 0 && level
< 1 && level
>= -1) {
273 fprintf(stderr
, Name
": raid level %s is incompatible with spare-devices setting.\n",
280 case O(CREATE
,'p'): /* raid5 layout */
282 fprintf(stderr
,Name
": layout may only be sent once. "
283 "Second value was %s\n", optarg
);
288 fprintf(stderr
, Name
": layout not meaningful for %s arrays.\n",
289 map_num(pers
, level
));
292 fprintf(stderr
, Name
": raid level must be given before layout.\n");
296 layout
= map_name(r5layout
, optarg
);
298 fprintf(stderr
, Name
": layout %s not understood for raid5.\n",
307 case O(BUILD
,'n'): /* number of raid disks */
309 fprintf(stderr
, Name
": raid-devices set twice: %d and %s\n",
313 raiddisks
= strtol(optarg
, &c
, 10);
314 if (!optarg
[0] || *c
|| raiddisks
<=0 || raiddisks
> MD_SB_DISKS
) {
315 fprintf(stderr
, Name
": invalid number of raid devices: %s\n",
319 ident
.raid_disks
= raiddisks
;
322 case O(CREATE
,'x'): /* number of spare (eXtra) discs */
324 fprintf(stderr
,Name
": spare-devices set twice: %d and %s\n",
328 if (level
> -10 && level
<= 0 && level
>= -1) {
329 fprintf(stderr
, Name
": spare-devices setting is incompatible with raid level %d\n",
333 sparedisks
= strtol(optarg
, &c
, 10);
334 if (!optarg
[0] || *c
|| sparedisks
< 0 || sparedisks
> MD_SB_DISKS
- raiddisks
) {
335 fprintf(stderr
, Name
": invalid number of spare-devices: %s\n",
340 case O(CREATE
,'f'): /* force honouring of device list */
341 case O(ASSEMBLE
,'f'): /* force assembly */
342 case O(MISC
,'f'): /* force zero */
346 /* now for the Assemble options */
347 case O(ASSEMBLE
,'u'): /* uuid of array */
348 if (ident
.uuid_set
) {
349 fprintf(stderr
, Name
": uuid cannot be set twice. "
350 "Second value %s.\n", optarg
);
353 if (parse_uuid(optarg
, ident
.uuid
))
356 fprintf(stderr
,Name
": Bad uuid: %s\n", optarg
);
361 case O(ASSEMBLE
,'m'): /* super-minor for array */
362 if (ident
.super_minor
!= -1) {
363 fprintf(stderr
, Name
": super-minor cannot be set twice. "
364 "Second value: %s.\n", optarg
);
367 if (strcmp(optarg
, "dev")==0)
368 ident
.super_minor
= -2;
370 ident
.super_minor
= strtoul(optarg
, &cp
, 10);
371 if (!optarg
[0] || *cp
) {
372 fprintf(stderr
, Name
": Bad super-minor number: %s.\n", optarg
);
378 case O(ASSEMBLE
,'U'): /* update the superblock */
380 fprintf(stderr
, Name
": Can only update one aspect of superblock, both %s and %s given.\n",
385 if (strcmp(update
, "sparc2.2")==0) continue;
386 if (strcmp(update
, "super-minor") == 0)
388 fprintf(stderr
, Name
": '--update %s' invalid. Only 'sparc2.2' or 'super-minor' supported\n",update
);
391 case O(ASSEMBLE
,'c'): /* config file */
395 fprintf(stderr
, Name
": configfile cannot be set twice. "
396 "Second value is %s.\n", optarg
);
400 /* FIXME possibly check that config file exists. Even parse it */
402 case O(ASSEMBLE
,'s'): /* scan */
408 case O(MONITOR
,'m'): /* mail address */
410 fprintf(stderr
, Name
": only specify one mailaddress. %s ignored.\n",
416 case O(MONITOR
,'p'): /* alert program */
418 fprintf(stderr
, Name
": only specify one alter program. %s ignored.\n",
424 case O(MONITOR
,'d'): /* delay in seconds */
426 fprintf(stderr
, Name
": only specify delay once. %s ignored.\n",
429 delay
= strtol(optarg
, &c
, 10);
430 if (!optarg
[0] || *c
|| delay
<1) {
431 fprintf(stderr
, Name
": invalid delay: %s\n",
437 case O(MONITOR
,'f'): /* daemonise */
442 /* now the general management options. Some are applicable
443 * to other modes. None have arguments.
448 case O(ASSEMBLE
,'a'): /* add a drive */
451 case O(MANAGE
,'r'): /* remove a drive */
454 case O(MANAGE
,'f'): /* set faulty */
458 case O(ASSEMBLE
,'R'):
460 case O(CREATE
,'R'): /* Run the array */
462 fprintf(stderr
, Name
": Cannot both Stop and Run an array\n");
469 fprintf(stderr
, Name
": Cannot both Run and Stop an array\n");
477 fprintf(stderr
, Name
": Cannot have both readonly and readwrite\n");
484 fprintf(stderr
, Name
": Cannot have both readwrite and readonly.\n");
498 if (devmode
&& devmode
!= opt
&&
499 (devmode
== 'E' || (opt
== 'E' && devmode
!= 'Q'))) {
500 fprintf(stderr
, Name
": --examine/-E cannot be given with -%c\n",
501 devmode
=='E'?opt
:devmode
);
508 if (devmode
!= 'E') {
509 fprintf(stderr
, Name
": --sparc2.2 only allowed with --examine\n");
515 /* We have now processed all the valid options. Anything else is
518 fprintf(stderr
, Name
": option %c not valid in %s mode\n",
519 opt
, map_num(modes
, mode
));
525 fputs(Usage
, stderr
);
528 /* Ok, got the option parsing out of the way
529 * hopefully it's mostly right but there might be some stuff
532 * That is mosty checked in the per-mode stuff but...
534 * For @,B,C and A without -s, the first device listed must be an md device
535 * we check that here and open it.
538 if (mode
==MANAGE
|| mode
== BUILD
|| mode
== CREATE
|| (mode
== ASSEMBLE
&& ! scan
)) {
539 if (devs_found
< 1) {
540 fprintf(stderr
, Name
": an md device must be given in this mode\n");
543 mdfd
= open_mddev(devlist
->devname
);
546 if (ident
.super_minor
== -2) {
549 ident
.super_minor
= MINOR(stb
.st_rdev
);
556 /* readonly, add/remove, readwrite, runstop */
558 rv
= Manage_ro(devlist
->devname
, mdfd
, readonly
);
559 if (!rv
&& devs_found
>1)
560 rv
= Manage_subdevs(devlist
->devname
, mdfd
,
562 if (!rv
&& readonly
< 0)
563 rv
= Manage_ro(devlist
->devname
, mdfd
, readonly
);
565 rv
= Manage_runstop(devlist
->devname
, mdfd
, runstop
);
568 if (devs_found
== 1 && ident
.uuid_set
== 0 &&
569 ident
.super_minor
== -1 && !scan
) {
570 /* Only a device has been given, so get details from config file */
571 mddev_ident_t array_ident
= conf_get_ident(configfile
, devlist
->devname
);
572 mdfd
= open_mddev(devlist
->devname
);
576 if (array_ident
== NULL
) {
577 fprintf(stderr
, Name
": %s not identified in config file.\n",
582 rv
|= Assemble(devlist
->devname
, mdfd
, array_ident
, configfile
,
584 readonly
, runstop
, update
, verbose
, force
);
587 rv
= Assemble(devlist
->devname
, mdfd
, &ident
, configfile
,
589 readonly
, runstop
, update
, verbose
, force
);
590 else if (devs_found
>0) {
591 if (update
&& devs_found
> 1) {
592 fprintf(stderr
, Name
": can only update a single array at a time\n");
595 for (dv
= devlist
; dv
; dv
=dv
->next
) {
596 mddev_ident_t array_ident
= conf_get_ident(configfile
, dv
->devname
);
597 mdfd
= open_mddev(dv
->devname
);
602 if (array_ident
== NULL
) {
603 fprintf(stderr
, Name
": %s not identified in config file.\n",
608 rv
|= Assemble(dv
->devname
, mdfd
, array_ident
, configfile
,
610 readonly
, runstop
, update
, verbose
, force
);
613 mddev_ident_t array_list
= conf_get_ident(configfile
, NULL
);
615 fprintf(stderr
, Name
": No arrays found in config file\n");
618 for (; array_list
; array_list
= array_list
->next
) {
619 mdu_array_info_t array
;
620 mdfd
= open_mddev(array_list
->devname
);
625 if (ioctl(mdfd
, GET_ARRAY_INFO
, &array
)>=0)
626 /* already assembled, skip */
628 rv
|= Assemble(array_list
->devname
, mdfd
,
629 array_list
, configfile
,
631 readonly
, runstop
, NULL
, verbose
, force
);
636 rv
= Build(devlist
->devname
, mdfd
, chunk
, level
, raiddisks
, devlist
->next
);
639 rv
= Create(devlist
->devname
, mdfd
, chunk
, level
, layout
, size
,
640 raiddisks
, sparedisks
,
641 devs_found
-1, devlist
->next
, runstop
, verbose
, force
);
645 if (devmode
== 'E') {
646 if (devlist
== NULL
&& !scan
) {
647 fprintf(stderr
, Name
": No devices to examine\n");
651 devlist
= conf_get_devs(configfile
);
652 if (devlist
== NULL
) {
653 fprintf(stderr
, Name
": No devices listed in %s\n", configfile
?configfile
:DefaultConfFile
);
656 rv
= Examine(devlist
, scan
?!verbose
:brief
, scan
, SparcAdjust
);
658 if (devlist
== NULL
) {
659 if ((devmode
== 'S' ||devmode
=='D') && scan
) {
660 /* apply to all devices in /proc/mdstat */
661 struct mdstat_ent
*ms
= mdstat_read();
662 struct mdstat_ent
*e
;
663 for (e
=ms
; e
; e
=e
->next
) {
664 char *name
= get_md_name(e
->devnum
);
667 fprintf(stderr
, Name
": cannot find device file for %s\n",
672 rv
|= Detail(name
, !verbose
);
673 else if (devmode
=='S') {
674 mdfd
= open_mddev(name
);
676 rv
|= Manage_runstop(name
, mdfd
, -1);
681 fprintf(stderr
, Name
": No devices given.\n");
685 for (dv
=devlist
; dv
; dv
=dv
->next
) {
686 switch(dv
->disposition
) {
688 rv
|= Detail(dv
->devname
, brief
); continue;
689 case 'K': /* Zero superblock */
690 rv
|= Kill(dv
->devname
, force
); continue;
692 rv
|= Query(dv
->devname
); continue;
694 mdfd
= open_mddev(dv
->devname
);
696 switch(dv
->disposition
) {
698 rv
|= Manage_runstop(dv
->devname
, mdfd
, 1); break;
700 rv
|= Manage_runstop(dv
->devname
, mdfd
, -1); break;
702 rv
|= Manage_ro(dv
->devname
, mdfd
, 1); break;
704 rv
|= Manage_ro(dv
->devname
, mdfd
, -1); break;
710 if (!devlist
&& !scan
) {
711 fprintf(stderr
, Name
": Cannot monitor: need --scan or at least one device\n");
715 rv
= Monitor(devlist
, mailaddr
, program
,
716 delay
?delay
:60, daemonise
, scan
, configfile
);