2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2012 Neil Brown <neilb@suse.de>
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@suse.de>
24 * Additions for bitmap and write-behind RAID options, Copyright (C) 2003-2004,
25 * Paul Clements, SteelEye Technology, Inc.
33 static int scan_assemble(struct supertype
*ss
,
35 struct mddev_ident
*ident
);
36 static int misc_scan(char devmode
, struct context
*c
);
37 static int stop_scan(int verbose
);
38 static int misc_list(struct mddev_dev
*devlist
,
39 struct mddev_ident
*ident
,
40 struct supertype
*ss
, struct context
*c
);
43 int main(int argc
, char *argv
[])
51 unsigned long long array_size
= 0;
52 struct mddev_ident ident
;
53 char *configfile
= NULL
;
56 struct mddev_dev
*devlist
= NULL
;
57 struct mddev_dev
**devlistend
= & devlist
;
60 char *symlinks
= NULL
;
61 int grow_continue
= 0;
62 /* autof indicates whether and how to create device node.
63 * bottom 3 bits are style. Rest (when shifted) are number of parts
65 * 1 - don't create (no)
66 * 2 - if is_standard, then create (yes)
67 * 3 - create as 'md' - reject is_standard mdp (md)
68 * 4 - create as 'mdp' - reject is_standard md (mdp)
69 * 5 - default to md if not is_standard (md in config file)
70 * 6 - default to mdp if not is_standard (part, or mdp in config file)
73 .require_homehost
= 1,
78 .bitmap_chunk
= UnSet
,
81 char sys_hostname
[256];
82 char *mailaddr
= NULL
;
88 int spare_sharing
= 1;
89 struct supertype
*ss
= NULL
;
91 char *shortopt
= short_options
;
94 char *remove_path
= NULL
;
95 char *udev_filename
= NULL
;
102 srandom(time(0) ^ getpid());
106 ident
.raid_disks
= UnSet
;
107 ident
.super_minor
= UnSet
;
109 ident
.spare_group
= NULL
;
112 ident
.bitmap_fd
= -1;
113 ident
.bitmap_file
= NULL
;
115 ident
.container
= NULL
;
118 while ((option_index
= -1) ,
119 (opt
=getopt_long(argc
, argv
,
120 shortopt
, long_options
,
121 &option_index
)) != -1) {
123 /* firstly, some mode-independent options */
133 fputs(Version
, stderr
);
136 case 'v': c
.verbose
++;
139 case 'q': c
.verbose
--;
143 if (mode
== ASSEMBLE
|| mode
== BUILD
|| mode
== CREATE
144 || mode
== GROW
|| mode
== INCREMENTAL
146 break; /* b means bitmap */
151 case 'Y': c
.export
++;
155 if (strcasecmp(optarg
, "<ignore>") == 0)
156 c
.require_homehost
= 0;
162 * --offroot sets first char of argv[0] to @. This is used
163 * by systemd to signal that the task was launched from
164 * initrd/initramfs and should be preserved during shutdown
174 if (asprintf(&c
.prefer
, "/%s/", optarg
) <= 0)
180 fputs(Usage
, stderr
);
183 /* second, figure out the mode.
184 * Some options force the mode. Others
185 * set the mode if it isn't already
191 shortopt
= short_bitmap_options
;
199 case ReAdd
: /* re-add */
202 shortopt
= short_bitmap_options
;
206 case 'A': newmode
= ASSEMBLE
;
207 shortopt
= short_bitmap_auto_options
;
209 case 'B': newmode
= BUILD
;
210 shortopt
= short_bitmap_auto_options
;
212 case 'C': newmode
= CREATE
;
213 shortopt
= short_bitmap_auto_options
;
215 case 'F': newmode
= MONITOR
;
217 case 'G': newmode
= GROW
;
218 shortopt
= short_bitmap_options
;
220 case 'I': newmode
= INCREMENTAL
;
221 shortopt
= short_bitmap_auto_options
;
224 newmode
= AUTODETECT
;
255 if (mode
&& newmode
== mode
) {
256 /* everybody happy ! */
257 } else if (mode
&& newmode
!= mode
) {
260 if (option_index
>= 0)
261 fprintf(stderr
, "--%s", long_options
[option_index
].name
);
263 fprintf(stderr
, "-%c", opt
);
264 fprintf(stderr
, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
265 map_num(modes
, newmode
),
266 map_num(modes
, mode
));
268 } else if (!mode
&& newmode
) {
270 if (mode
== MISC
&& devs_found
) {
271 pr_err("No action given for %s in --misc mode\n",
273 fprintf(stderr
," Action options must come before device names\n");
277 /* special case of -c --help */
278 if ((opt
== 'c' || opt
== ConfigFile
) &&
279 ( strncmp(optarg
, "--h", 3)==0 ||
280 strncmp(optarg
, "-h", 2)==0)) {
281 fputs(Help_config
, stdout
);
285 /* If first option is a device, don't force the mode yet */
287 if (devs_found
== 0) {
288 dv
= xmalloc(sizeof(*dv
));
289 dv
->devname
= optarg
;
290 dv
->disposition
= devmode
;
291 dv
->writemostly
= writemostly
;
295 devlistend
= &dv
->next
;
300 /* No mode yet, and this is the second device ... */
301 pr_err("An option must be given to set the mode before a second device\n"
302 " (%s) is listed\n", optarg
);
305 if (option_index
>= 0)
306 pr_err("--%s", long_options
[option_index
].name
);
309 fprintf(stderr
, " does not set the mode, and so cannot be the first option.\n");
313 /* if we just set the mode, then done */
327 /* an undecorated option - must be a device name.
330 if (devs_found
> 0 && devmode
== DetailPlatform
) {
331 pr_err("controller may only be specified once. %s ignored\n",
336 if (devs_found
> 0 && mode
== MANAGE
&& !devmode
) {
337 pr_err("Must give one of -a/-r/-f"
338 " for subsequent devices at %s\n", optarg
);
341 if (devs_found
> 0 && mode
== GROW
&& !devmode
) {
342 pr_err("Must give -a/--add for"
343 " devices to add: %s\n", optarg
);
346 dv
= xmalloc(sizeof(*dv
));
347 dv
->devname
= optarg
;
348 dv
->disposition
= devmode
;
349 dv
->writemostly
= writemostly
;
353 devlistend
= &dv
->next
;
359 /* We've got a mode, and opt is now something else which
360 * could depend on the mode */
361 #define O(a,b) ((a<<16)|b)
362 switch (O(mode
,opt
)) {
364 case O(GROW
,ChunkSize
):
366 case O(CREATE
,ChunkSize
):
367 case O(BUILD
,'c'): /* chunk or rounding */
368 case O(BUILD
,ChunkSize
): /* chunk or rounding */
370 pr_err("chunk/rounding may only be specified once. "
371 "Second value is %s.\n", optarg
);
374 s
.chunk
= parse_size(optarg
);
375 if (s
.chunk
== INVALID_SECTORS
||
376 s
.chunk
< 8 || (s
.chunk
&1)) {
377 pr_err("invalid chunk/rounding value: %s\n",
381 /* Convert sectors to K */
385 case O(INCREMENTAL
, 'e'):
387 case O(ASSEMBLE
,'e'):
388 case O(MISC
,'e'): /* set metadata (superblock) information */
390 pr_err("metadata information already given\n");
393 for(i
=0; !ss
&& superlist
[i
]; i
++)
394 ss
= superlist
[i
]->match_metadata_desc(optarg
);
397 pr_err("unrecognised metadata identifier: %s\n", optarg
);
403 case O(MANAGE
,WriteMostly
):
405 case O(BUILD
,WriteMostly
):
407 case O(CREATE
,WriteMostly
):
408 /* set write-mostly for following devices */
413 /* clear write-mostly for following devices */
420 case O(BUILD
,'z'): /* size */
422 pr_err("size may only be specified once. "
423 "Second value is %s.\n", optarg
);
426 if (strcmp(optarg
, "max")==0)
429 s
.size
= parse_size(optarg
);
430 if (s
.size
== INVALID_SECTORS
||
432 pr_err("invalid size: %s\n",
436 /* convert sectors to K */
441 case O(GROW
,'Z'): /* array size */
442 if (array_size
> 0) {
443 pr_err("array-size may only be specified once. "
444 "Second value is %s.\n", optarg
);
447 if (strcmp(optarg
, "max") == 0)
448 array_size
= MAX_SIZE
;
450 array_size
= parse_size(optarg
);
451 if (array_size
== 0 ||
452 array_size
== INVALID_SECTORS
) {
453 pr_err("invalid array size: %s\n",
462 case O(BUILD
,'l'): /* set raid level*/
463 if (s
.level
!= UnSet
) {
464 pr_err("raid level may only be set once. "
465 "Second value is %s.\n", optarg
);
468 s
.level
= map_name(pers
, optarg
);
469 if (s
.level
== UnSet
) {
470 pr_err("invalid raid level: %s\n",
474 if (s
.level
!= 0 && s
.level
!= LEVEL_LINEAR
&& s
.level
!= 1 &&
475 s
.level
!= LEVEL_MULTIPATH
&& s
.level
!= LEVEL_FAULTY
&&
478 pr_err("Raid level %s not permitted with --build.\n",
482 if (s
.sparedisks
> 0 && s
.level
< 1 && s
.level
>= -1) {
483 pr_err("raid level %s is incompatible with spare-devices setting.\n",
487 ident
.level
= s
.level
;
490 case O(GROW
, 'p'): /* new layout */
491 case O(GROW
, Layout
):
493 pr_err("layout may only be sent once. "
494 "Second value was %s\n", optarg
);
497 s
.layout_str
= optarg
;
498 /* 'Grow' will parse the value */
501 case O(CREATE
,'p'): /* raid5 layout */
502 case O(CREATE
,Layout
):
503 case O(BUILD
,'p'): /* faulty layout */
504 case O(BUILD
,Layout
):
505 if (s
.layout
!= UnSet
) {
506 pr_err("layout may only be sent once. "
507 "Second value was %s\n", optarg
);
512 pr_err("layout not meaningful for %s arrays.\n",
513 map_num(pers
, s
.level
));
516 pr_err("raid level must be given before layout.\n");
520 s
.layout
= map_name(r5layout
, optarg
);
521 if (s
.layout
==UnSet
) {
522 pr_err("layout %s not understood for raid5.\n",
528 s
.layout
= map_name(r6layout
, optarg
);
529 if (s
.layout
==UnSet
) {
530 pr_err("layout %s not understood for raid6.\n",
537 s
.layout
= parse_layout_10(optarg
);
539 pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg
);
547 s
.layout
= parse_layout_faulty(optarg
);
548 if (s
.layout
== -1) {
549 pr_err("layout %s not understood for faulty.\n",
557 case O(CREATE
,AssumeClean
):
558 case O(BUILD
,AssumeClean
): /* assume clean */
559 case O(GROW
,AssumeClean
):
565 case O(BUILD
,'n'): /* number of raid disks */
567 pr_err("raid-devices set twice: %d and %s\n",
568 s
.raiddisks
, optarg
);
571 s
.raiddisks
= parse_num(optarg
);
572 if (s
.raiddisks
<= 0) {
573 pr_err("invalid number of raid devices: %s\n",
577 ident
.raid_disks
= s
.raiddisks
;
580 case O(CREATE
,'x'): /* number of spare (eXtra) disks */
582 pr_err("spare-devices set twice: %d and %s\n",
583 s
.sparedisks
, optarg
);
586 if (s
.level
!= UnSet
&& s
.level
<= 0 && s
.level
>= -1) {
587 pr_err("spare-devices setting is incompatible with raid level %d\n",
591 s
.sparedisks
= parse_num(optarg
);
592 if (s
.sparedisks
< 0) {
593 pr_err("invalid number of spare-devices: %s\n",
603 case O(INCREMENTAL
,'a'):
604 case O(INCREMENTAL
,Auto
):
605 case O(ASSEMBLE
,'a'):
606 case O(ASSEMBLE
,Auto
): /* auto-creation of device node */
607 c
.autof
= parse_auto(optarg
, "--auto flag", 0);
610 case O(CREATE
,Symlinks
):
611 case O(BUILD
,Symlinks
):
612 case O(ASSEMBLE
,Symlinks
): /* auto creation of symlinks in /dev to /dev/md */
616 case O(BUILD
,'f'): /* force honouring '-n 1' */
617 case O(BUILD
,Force
): /* force honouring '-n 1' */
618 case O(GROW
,'f'): /* ditto */
619 case O(GROW
,Force
): /* ditto */
620 case O(CREATE
,'f'): /* force honouring of device list */
621 case O(CREATE
,Force
): /* force honouring of device list */
622 case O(ASSEMBLE
,'f'): /* force assembly */
623 case O(ASSEMBLE
,Force
): /* force assembly */
624 case O(MISC
,'f'): /* force zero */
625 case O(MISC
,Force
): /* force zero */
626 case O(MANAGE
,Force
): /* add device which is too large */
629 /* now for the Assemble options */
630 case O(ASSEMBLE
, FreezeReshape
): /* Freeze reshape during
632 case O(INCREMENTAL
, FreezeReshape
):
633 c
.freeze_reshape
= 1;
635 case O(CREATE
,'u'): /* uuid of array */
636 case O(ASSEMBLE
,'u'): /* uuid of array */
637 if (ident
.uuid_set
) {
638 pr_err("uuid cannot be set twice. "
639 "Second value %s.\n", optarg
);
642 if (parse_uuid(optarg
, ident
.uuid
))
645 pr_err("Bad uuid: %s\n", optarg
);
651 case O(ASSEMBLE
,'N'):
654 pr_err("name cannot be set twice. "
655 "Second value %s.\n", optarg
);
658 if (mode
== MISC
&& !c
.subarray
) {
659 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
662 if (strlen(optarg
) > 32) {
663 pr_err("name '%s' is too long, 32 chars max.\n",
667 strcpy(ident
.name
, optarg
);
670 case O(ASSEMBLE
,'m'): /* super-minor for array */
671 case O(ASSEMBLE
,SuperMinor
):
672 if (ident
.super_minor
!= UnSet
) {
673 pr_err("super-minor cannot be set twice. "
674 "Second value: %s.\n", optarg
);
677 if (strcmp(optarg
, "dev")==0)
678 ident
.super_minor
= -2;
680 ident
.super_minor
= parse_num(optarg
);
681 if (ident
.super_minor
< 0) {
682 pr_err("Bad super-minor number: %s.\n", optarg
);
688 case O(ASSEMBLE
,'o'):
694 case O(ASSEMBLE
,'U'): /* update the superblock */
697 pr_err("Can only update one aspect"
698 " of superblock, both %s and %s given.\n",
702 if (mode
== MISC
&& !c
.subarray
) {
703 pr_err("Only subarrays can be"
704 " updated in misc mode\n");
708 if (strcmp(c
.update
, "sparc2.2")==0)
710 if (strcmp(c
.update
, "super-minor") == 0)
712 if (strcmp(c
.update
, "summaries")==0)
714 if (strcmp(c
.update
, "resync")==0)
716 if (strcmp(c
.update
, "uuid")==0)
718 if (strcmp(c
.update
, "name")==0)
720 if (strcmp(c
.update
, "homehost")==0)
722 if (strcmp(c
.update
, "devicesize")==0)
724 if (strcmp(c
.update
, "no-bitmap")==0)
726 if (strcmp(c
.update
, "bbl") == 0)
728 if (strcmp(c
.update
, "no-bbl") == 0)
730 if (strcmp(c
.update
, "byteorder")==0) {
732 pr_err("must not set metadata"
733 " type with --update=byteorder.\n");
736 for(i
=0; !ss
&& superlist
[i
]; i
++)
737 ss
= superlist
[i
]->match_metadata_desc(
740 pr_err("INTERNAL ERROR"
741 " cannot find 0.swap\n");
747 if (strcmp(c
.update
,"?") == 0 ||
748 strcmp(c
.update
, "help") == 0) {
750 fprintf(outf
, Name
": ");
754 Name
": '--update=%s' is invalid. ",
757 fprintf(outf
, "Valid --update options are:\n"
758 " 'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
759 " 'summaries', 'homehost', 'byteorder', 'devicesize',\n"
761 exit(outf
== stdout
? 0 : 2);
764 /* update=devicesize is allowed with --re-add */
765 if (devmode
!= 'A') {
766 pr_err("--update in Manage mode only"
767 " allowed with --re-add.\n");
771 pr_err("Can only update one aspect"
772 " of superblock, both %s and %s given.\n",
777 if (strcmp(c
.update
, "devicesize") != 0 &&
778 strcmp(c
.update
, "bbl") != 0 &&
779 strcmp(c
.update
, "no-bbl") != 0) {
780 pr_err("only 'devicesize', 'bbl' and 'no-bbl' can be"
781 " updated with --re-add\n");
786 case O(INCREMENTAL
,NoDegraded
):
787 pr_err("--no-degraded is deprecated in Incremental mode\n");
788 case O(ASSEMBLE
,NoDegraded
): /* --no-degraded */
789 c
.runstop
= -1; /* --stop isn't allowed for --assemble,
790 * so we overload slightly */
793 case O(ASSEMBLE
,'c'):
794 case O(ASSEMBLE
,ConfigFile
):
795 case O(INCREMENTAL
, 'c'):
796 case O(INCREMENTAL
, ConfigFile
):
798 case O(MISC
, ConfigFile
):
800 case O(MONITOR
,ConfigFile
):
802 pr_err("configfile cannot be set twice. "
803 "Second value is %s.\n", optarg
);
807 set_conffile(configfile
);
808 /* FIXME possibly check that config file exists. Even parse it */
810 case O(ASSEMBLE
,'s'): /* scan */
813 case O(INCREMENTAL
,'s'):
817 case O(MONITOR
,'m'): /* mail address */
818 case O(MONITOR
,EMail
):
820 pr_err("only specify one mailaddress. %s ignored.\n",
826 case O(MONITOR
,'p'): /* alert program */
827 case O(MONITOR
,ProgramOpt
): /* alert program */
829 pr_err("only specify one alter program. %s ignored.\n",
835 case O(MONITOR
,'r'): /* rebuild increments */
836 case O(MONITOR
,Increment
):
837 increments
= atoi(optarg
);
838 if (increments
> 99 || increments
< 1) {
839 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
844 case O(MONITOR
,'d'): /* delay in seconds */
846 case O(BUILD
,'d'): /* delay for bitmap updates */
849 pr_err("only specify delay once. %s ignored.\n",
852 c
.delay
= parse_num(optarg
);
854 pr_err("invalid delay: %s\n",
860 case O(MONITOR
,'f'): /* daemonise */
861 case O(MONITOR
,Fork
):
864 case O(MONITOR
,'i'): /* pid */
866 pr_err("only specify one pid file. %s ignored.\n",
871 case O(MONITOR
,'1'): /* oneshot */
875 case O(MONITOR
,'t'): /* test */
878 case O(MONITOR
,'y'): /* log messages to syslog */
879 openlog("mdadm", LOG_PID
, SYSLOG_FACILITY
);
882 case O(MONITOR
, NoSharing
):
886 /* now the general management options. Some are applicable
887 * to other modes. None have arguments.
892 case O(MANAGE
,Add
): /* add a drive */
895 case O(MANAGE
,ReAdd
):
898 case O(MANAGE
,'r'): /* remove a drive */
899 case O(MANAGE
,Remove
):
902 case O(MANAGE
,'f'): /* set faulty */
904 case O(INCREMENTAL
,'f'):
905 case O(INCREMENTAL
,Remove
):
906 case O(INCREMENTAL
,Fail
): /* r for incremental is taken, use f
907 * even though we will both fail and
908 * remove the device */
911 case O(INCREMENTAL
,'R'):
913 case O(ASSEMBLE
,'R'):
915 case O(CREATE
,'R'): /* Run the array */
917 pr_err("Cannot both Stop and Run an array\n");
924 pr_err("Cannot both Run and Stop an array\n");
936 case O(MISC
,KillOpt
):
943 case O(MISC
, WaitOpt
):
944 case O(MISC
, Waitclean
):
945 case O(MISC
, DetailPlatform
):
946 case O(MISC
, KillSubarray
):
947 case O(MISC
, UpdateSubarray
):
948 if (opt
== KillSubarray
|| opt
== UpdateSubarray
) {
950 pr_err("subarray can only"
951 " be specified once\n");
956 if (devmode
&& devmode
!= opt
&&
957 (devmode
== 'E' || (opt
== 'E' && devmode
!= 'Q'))) {
958 pr_err("--examine/-E cannot be given with ");
959 if (devmode
== 'E') {
960 if (option_index
>= 0)
961 fprintf(stderr
, "--%s\n",
962 long_options
[option_index
].name
);
964 fprintf(stderr
, "-%c\n", opt
);
965 } else if (isalpha(devmode
))
966 fprintf(stderr
, "-%c\n", devmode
);
968 fprintf(stderr
, "previous option\n");
973 case O(MISC
, UdevRules
):
974 if (devmode
&& devmode
!= opt
) {
975 pr_err("--udev-rules must"
976 " be the only option.\n");
979 pr_err("only specify one udev "
980 "rule filename. %s ignored.\n",
983 udev_filename
= optarg
;
991 case O(MISC
, Sparc22
):
992 if (devmode
!= 'E') {
993 pr_err("--sparc2.2 only allowed with --examine\n");
999 case O(ASSEMBLE
,'b'): /* here we simply set the bitmap file */
1000 case O(ASSEMBLE
,Bitmap
):
1002 pr_err("bitmap file needed with -b in --assemble mode\n");
1005 if (strcmp(optarg
, "internal")==0) {
1006 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1009 bitmap_fd
= open(optarg
, O_RDWR
);
1010 if (!*optarg
|| bitmap_fd
< 0) {
1011 pr_err("cannot open bitmap file %s: %s\n", optarg
, strerror(errno
));
1014 ident
.bitmap_fd
= bitmap_fd
; /* for Assemble */
1017 case O(ASSEMBLE
, BackupFile
):
1018 case O(GROW
, BackupFile
):
1019 /* Specify a file into which grow might place a backup,
1020 * or from which assemble might recover a backup
1022 if (c
.backup_file
) {
1023 pr_err("backup file already specified, rejecting %s\n", optarg
);
1026 c
.backup_file
= optarg
;
1029 case O(GROW
, Continue
):
1030 /* Continue interrupted grow
1034 case O(ASSEMBLE
, InvalidBackup
):
1035 /* Acknowledge that the backupfile is invalid, but ask
1036 * to continue anyway
1038 c
.invalid_backup
= 1;
1042 case O(BUILD
,Bitmap
):
1044 case O(CREATE
,Bitmap
): /* here we create the bitmap */
1045 if (strcmp(optarg
, "none") == 0) {
1046 pr_err("'--bitmap none' only"
1047 " supported for --grow\n");
1052 case O(GROW
,Bitmap
):
1053 if (strcmp(optarg
, "internal")== 0 ||
1054 strcmp(optarg
, "none")== 0 ||
1055 strchr(optarg
, '/') != NULL
) {
1056 s
.bitmap_file
= optarg
;
1060 pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
1061 " not '%s'\n", optarg
);
1064 case O(GROW
,BitmapChunk
):
1065 case O(BUILD
,BitmapChunk
):
1066 case O(CREATE
,BitmapChunk
): /* bitmap chunksize */
1067 s
.bitmap_chunk
= parse_size(optarg
);
1068 if (s
.bitmap_chunk
== 0 ||
1069 s
.bitmap_chunk
== INVALID_SECTORS
||
1070 s
.bitmap_chunk
& (s
.bitmap_chunk
- 1)) {
1071 pr_err("invalid bitmap chunksize: %s\n",
1075 s
.bitmap_chunk
= s
.bitmap_chunk
* 512;
1078 case O(GROW
, WriteBehind
):
1079 case O(BUILD
, WriteBehind
):
1080 case O(CREATE
, WriteBehind
): /* write-behind mode */
1081 s
.write_behind
= DEFAULT_MAX_WRITE_BEHIND
;
1083 s
.write_behind
= parse_num(optarg
);
1084 if (s
.write_behind
< 0 ||
1085 s
.write_behind
> 16383) {
1086 pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg
);
1092 case O(INCREMENTAL
, 'r'):
1093 case O(INCREMENTAL
, RebuildMapOpt
):
1096 case O(INCREMENTAL
, IncrementalPath
):
1097 remove_path
= optarg
;
1100 /* We have now processed all the valid options. Anything else is
1103 if (option_index
> 0)
1104 pr_err(":option --%s not valid in %s mode\n",
1105 long_options
[option_index
].name
,
1106 map_num(modes
, mode
));
1108 pr_err("option -%c not valid in %s mode\n",
1109 opt
, map_num(modes
, mode
));
1116 if (print_help
== 2)
1117 help_text
= OptionHelp
;
1119 help_text
= mode_help
[mode
];
1120 if (help_text
== NULL
)
1122 fputs(help_text
,stdout
);
1126 if (!mode
&& devs_found
) {
1129 if (devlist
->disposition
== 0)
1130 devlist
->disposition
= devmode
;
1133 fputs(Usage
, stderr
);
1138 struct createinfo
*ci
= conf_get_create_info();
1140 if (strcasecmp(symlinks
, "yes") == 0)
1142 else if (strcasecmp(symlinks
, "no") == 0)
1145 pr_err("option --symlinks must be 'no' or 'yes'\n");
1149 /* Ok, got the option parsing out of the way
1150 * hopefully it's mostly right but there might be some stuff
1153 * That is mosty checked in the per-mode stuff but...
1155 * For @,B,C and A without -s, the first device listed must be
1156 * an md device. We check that here and open it.
1159 if (mode
== MANAGE
|| mode
== BUILD
|| mode
== CREATE
1161 || (mode
== ASSEMBLE
&& ! c
.scan
)) {
1162 if (devs_found
< 1) {
1163 pr_err("an md device must be given in this mode\n");
1166 if ((int)ident
.super_minor
== -2 && c
.autof
) {
1167 pr_err("--super-minor=dev is incompatible with --auto\n");
1170 if (mode
== MANAGE
|| mode
== GROW
) {
1171 mdfd
= open_mddev(devlist
->devname
, 1);
1175 /* non-existent device is OK */
1176 mdfd
= open_mddev(devlist
->devname
, 0);
1178 pr_err("device %s exists but is not an "
1179 "md array.\n", devlist
->devname
);
1182 if ((int)ident
.super_minor
== -2) {
1185 pr_err("--super-minor=dev given, and "
1186 "listed device %s doesn't exist.\n",
1191 ident
.super_minor
= minor(stb
.st_rdev
);
1193 if (mdfd
>= 0 && mode
!= MANAGE
&& mode
!= GROW
) {
1194 /* We don't really want this open yet, we just might
1195 * have wanted to check some things
1203 if (s
.raiddisks
== 1 && !c
.force
&& s
.level
!= LEVEL_FAULTY
) {
1204 pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1205 " a mistake. If you really mean it you will need to specify --force before\n"
1206 " setting the number of drives.\n");
1211 if (c
.homehost
== NULL
)
1212 c
.homehost
= conf_get_homehost(&c
.require_homehost
);
1213 if (c
.homehost
== NULL
|| strcasecmp(c
.homehost
, "<system>")==0) {
1214 if (gethostname(sys_hostname
, sizeof(sys_hostname
)) == 0) {
1215 sys_hostname
[sizeof(sys_hostname
)-1] = 0;
1216 c
.homehost
= sys_hostname
;
1219 if (c
.homehost
&& (!c
.homehost
[0] || strcasecmp(c
.homehost
, "<none>") == 0)) {
1221 c
.require_homehost
= 0;
1224 if ((mode
== MISC
&& devmode
== 'E')
1225 || (mode
== MONITOR
&& spare_sharing
== 0))
1226 /* Anyone may try this */;
1227 else if (geteuid() != 0) {
1228 pr_err("must be super-user to perform this action\n");
1232 ident
.autof
= c
.autof
;
1234 if (c
.scan
&& c
.verbose
< 2)
1235 /* --scan implied --brief unless -vv */
1241 /* readonly, add/remove, readwrite, runstop */
1243 rv
= Manage_ro(devlist
->devname
, mdfd
, c
.readonly
);
1244 if (!rv
&& devs_found
>1)
1245 rv
= Manage_subdevs(devlist
->devname
, mdfd
,
1246 devlist
->next
, c
.verbose
, c
.test
,
1248 if (!rv
&& c
.readonly
< 0)
1249 rv
= Manage_ro(devlist
->devname
, mdfd
, c
.readonly
);
1250 if (!rv
&& c
.runstop
)
1251 rv
= Manage_runstop(devlist
->devname
, mdfd
, c
.runstop
, c
.verbose
, 0);
1254 if (devs_found
== 1 && ident
.uuid_set
== 0 &&
1255 ident
.super_minor
== UnSet
&& ident
.name
[0] == 0 && !c
.scan
) {
1256 /* Only a device has been given, so get details from config file */
1257 struct mddev_ident
*array_ident
= conf_get_ident(devlist
->devname
);
1258 if (array_ident
== NULL
) {
1259 pr_err("%s not identified in config file.\n",
1265 if (array_ident
->autof
== 0)
1266 array_ident
->autof
= c
.autof
;
1267 rv
|= Assemble(ss
, devlist
->devname
, array_ident
,
1271 rv
= Assemble(ss
, devlist
->devname
, &ident
,
1273 else if (devs_found
> 0) {
1274 if (c
.update
&& devs_found
> 1) {
1275 pr_err("can only update a single array at a time\n");
1278 if (c
.backup_file
&& devs_found
> 1) {
1279 pr_err("can only assemble a single array when providing a backup file.\n");
1282 for (dv
= devlist
; dv
; dv
=dv
->next
) {
1283 struct mddev_ident
*array_ident
= conf_get_ident(dv
->devname
);
1284 if (array_ident
== NULL
) {
1285 pr_err("%s not identified in config file.\n",
1290 if (array_ident
->autof
== 0)
1291 array_ident
->autof
= c
.autof
;
1292 rv
|= Assemble(ss
, dv
->devname
, array_ident
,
1297 pr_err("--update not meaningful with a --scan assembly.\n");
1300 if (c
.backup_file
) {
1301 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1304 rv
= scan_assemble(ss
, &c
, &ident
);
1310 c
.delay
= DEFAULT_BITMAP_DELAY
;
1311 if (s
.write_behind
&& !s
.bitmap_file
) {
1312 pr_err("write-behind mode requires a bitmap.\n");
1316 if (s
.raiddisks
== 0) {
1317 pr_err("no raid-devices specified.\n");
1322 if (s
.bitmap_file
) {
1323 if (strcmp(s
.bitmap_file
, "internal")==0) {
1324 pr_err("'internal' bitmaps not supported with --build\n");
1329 rv
= Build(devlist
->devname
, devlist
->next
, &s
, &c
);
1333 c
.delay
= DEFAULT_BITMAP_DELAY
;
1334 if (s
.write_behind
&& !s
.bitmap_file
) {
1335 pr_err("write-behind mode requires a bitmap.\n");
1339 if (s
.raiddisks
== 0) {
1340 pr_err("no raid-devices specified.\n");
1345 rv
= Create(ss
, devlist
->devname
,
1346 ident
.name
, ident
.uuid_set
? ident
.uuid
: NULL
,
1347 devs_found
-1, devlist
->next
,
1351 if (devmode
== 'E') {
1352 if (devlist
== NULL
&& !c
.scan
) {
1353 pr_err("No devices to examine\n");
1356 if (devlist
== NULL
)
1357 devlist
= conf_get_devs();
1358 if (devlist
== NULL
) {
1359 pr_err("No devices listed in %s\n", configfile
?configfile
:DefaultConfFile
);
1362 rv
= Examine(devlist
, &c
, ss
);
1363 } else if (devmode
== DetailPlatform
) {
1364 rv
= Detail_Platform(ss
? ss
->ss
: NULL
, ss
? c
.scan
: 1,
1365 c
.verbose
, c
.export
,
1366 devlist
? devlist
->devname
: NULL
);
1367 } else if (devlist
== NULL
) {
1368 if (devmode
== 'S' && c
.scan
)
1369 rv
= stop_scan(c
.verbose
);
1370 else if ((devmode
== 'D' || devmode
== Waitclean
) && c
.scan
)
1371 rv
= misc_scan(devmode
, &c
);
1372 else if (devmode
== UdevRules
)
1373 rv
= Write_rules(udev_filename
);
1375 pr_err("No devices given.\n");
1379 rv
= misc_list(devlist
, &ident
, ss
, &c
);
1382 if (!devlist
&& !c
.scan
) {
1383 pr_err("Cannot monitor: need --scan or at least one device\n");
1387 if (pidfile
&& !daemonise
) {
1388 pr_err("Cannot write a pid file when not in daemon mode\n");
1393 if (get_linux_version() > 2006016)
1394 /* mdstat responds to poll */
1401 rv
= Monitor(devlist
, mailaddr
, program
,
1402 &c
, daemonise
, oneshot
,
1403 dosyslog
, pidfile
, increments
,
1408 if (array_size
> 0) {
1409 /* alway impose array size first, independent of
1411 * Do not allow level or raid_disks changes at the
1412 * same time as that can be irreversibly destructive.
1416 if (s
.raiddisks
|| s
.level
!= UnSet
) {
1417 pr_err("cannot change array size in same operation "
1418 "as changing raiddisks or level.\n"
1419 " Change size first, then check that data is still intact.\n");
1423 sysfs_init(&sra
, mdfd
, 0);
1424 if (array_size
== MAX_SIZE
)
1425 err
= sysfs_set_str(&sra
, NULL
, "array_size", "default");
1427 err
= sysfs_set_num(&sra
, NULL
, "array_size", array_size
/ 2);
1430 pr_err("--array-size setting"
1431 " is too large.\n");
1433 pr_err("current kernel does"
1434 " not support setting --array-size\n");
1439 if (devs_found
> 1 && s
.raiddisks
== 0) {
1441 if (s
.size
> 0 || s
.chunk
|| s
.layout_str
!= NULL
|| s
.bitmap_file
) {
1442 pr_err("--add cannot be used with "
1443 "other geometry changes in --grow mode\n");
1447 for (dv
=devlist
->next
; dv
; dv
=dv
->next
) {
1448 rv
= Grow_Add_device(devlist
->devname
, mdfd
,
1453 } else if (s
.bitmap_file
) {
1454 if (s
.size
> 0 || s
.raiddisks
|| s
.chunk
||
1455 s
.layout_str
!= NULL
|| devs_found
> 1) {
1456 pr_err("--bitmap changes cannot be "
1457 "used with other geometry changes "
1458 "in --grow mode\n");
1463 c
.delay
= DEFAULT_BITMAP_DELAY
;
1464 rv
= Grow_addbitmap(devlist
->devname
, mdfd
, &c
, &s
);
1465 } else if (grow_continue
)
1466 rv
= Grow_continue_command(devlist
->devname
,
1467 mdfd
, c
.backup_file
,
1469 else if (s
.size
> 0 || s
.raiddisks
|| s
.layout_str
!= NULL
1470 || s
.chunk
!= 0 || s
.level
!= UnSet
) {
1471 rv
= Grow_reshape(devlist
->devname
, mdfd
,
1472 devlist
->next
, &c
, &s
);
1473 } else if (array_size
== 0)
1474 pr_err("no changes to --grow\n");
1481 if (c
.runstop
<= 0) {
1482 pr_err("--incremental --scan meaningless without --run.\n");
1485 if (devmode
== 'f') {
1486 pr_err("--incremental --scan --fail not supported.\n");
1489 rv
= IncrementalScan(c
.verbose
);
1492 if (!rebuild_map
&& !c
.scan
) {
1493 pr_err("--incremental requires a device.\n");
1498 if (devlist
->next
) {
1499 pr_err("--incremental can only handle one device.\n");
1504 rv
= IncrementalRemove(devlist
->devname
, remove_path
,
1507 rv
= Incremental(devlist
->devname
, &c
, ss
);
1516 static int scan_assemble(struct supertype
*ss
,
1518 struct mddev_ident
*ident
)
1520 struct mddev_ident
*a
, *array_list
= conf_get_ident(NULL
);
1521 struct mddev_dev
*devlist
= conf_get_devs();
1522 struct map_ent
*map
= NULL
;
1525 int failures
, successes
;
1527 if (conf_verify_devnames(array_list
)) {
1528 pr_err("Duplicate MD device names in "
1529 "conf file were found.\n");
1532 if (devlist
== NULL
) {
1533 pr_err("No devices listed in conf file were found.\n");
1536 for (a
= array_list
; a
; a
= a
->next
) {
1539 a
->autof
= c
->autof
;
1542 pr_err("%s: failed to get "
1543 "exclusive lock on mapfile\n",
1549 for (a
= array_list
; a
; a
= a
->next
) {
1554 strcasecmp(a
->devname
, "<ignore>") == 0)
1557 r
= Assemble(ss
, a
->devname
,
1567 } while (failures
&& successes
);
1568 if (c
->homehost
&& cnt
== 0) {
1569 /* Maybe we can auto-assemble something.
1570 * Repeatedly call Assemble in auto-assemble mode
1575 ident
->autof
= c
->autof
;
1577 struct mddev_dev
*devlist
= conf_get_devs();
1580 rv2
= Assemble(ss
, NULL
,
1588 /* Incase there are stacked devices, we need to go around again */
1590 if (cnt
== 0 && rv
== 0) {
1591 pr_err("No arrays found in config file or automatically\n");
1595 } else if (cnt
== 0 && rv
== 0) {
1596 pr_err("No arrays found in config file\n");
1603 static int misc_scan(char devmode
, struct context
*c
)
1605 /* apply --detail or --wait-clean to
1606 * all devices in /proc/mdstat
1608 struct mdstat_ent
*ms
= mdstat_read(0, 1);
1609 struct mdstat_ent
*e
;
1610 struct map_ent
*map
= NULL
;
1614 for (members
= 0; members
<= 1; members
++) {
1615 for (e
=ms
; e
; e
=e
->next
) {
1618 int member
= e
->metadata_version
&&
1619 strncmp(e
->metadata_version
,
1620 "external:/", 10) == 0;
1621 if (members
!= member
)
1623 me
= map_by_devnum(&map
, e
->devnum
);
1625 && strcmp(me
->path
, "/unknown") != 0)
1628 name
= get_md_name(e
->devnum
);
1631 pr_err("cannot find device file for %s\n",
1636 rv
|= Detail(name
, c
);
1638 rv
|= WaitClean(name
, -1, c
->verbose
);
1646 static int stop_scan(int verbose
)
1648 /* apply --stop to all devices in /proc/mdstat */
1649 /* Due to possible stacking of devices, repeat until
1650 * nothing more can be stopped
1652 int progress
=1, err
;
1656 struct mdstat_ent
*ms
= mdstat_read(0, 0);
1657 struct mdstat_ent
*e
;
1659 if (!progress
) last
= 1;
1660 progress
= 0; err
= 0;
1661 for (e
=ms
; e
; e
=e
->next
) {
1662 char *name
= get_md_name(e
->devnum
);
1666 pr_err("cannot find device file for %s\n",
1670 mdfd
= open_mddev(name
, 1);
1672 if (Manage_runstop(name
, mdfd
, -1, verbose
, !last
))
1682 } while (!last
&& err
);
1688 static int misc_list(struct mddev_dev
*devlist
,
1689 struct mddev_ident
*ident
,
1690 struct supertype
*ss
, struct context
*c
)
1692 struct mddev_dev
*dv
;
1695 for (dv
=devlist
; dv
; dv
=dv
->next
) {
1698 switch(dv
->disposition
) {
1700 rv
|= Detail(dv
->devname
, c
);
1702 case KillOpt
: /* Zero superblock */
1704 rv
|= Kill(dv
->devname
, ss
, c
->force
, c
->verbose
,0);
1708 rv
|= Kill(dv
->devname
, NULL
, c
->force
, v
, 0);
1715 rv
|= Query(dv
->devname
); continue;
1717 rv
|= ExamineBitmap(dv
->devname
, c
->brief
, ss
); continue;
1720 rv
|= Wait(dv
->devname
); continue;
1722 rv
|= WaitClean(dv
->devname
, -1, c
->verbose
); continue;
1724 rv
|= Kill_subarray(dv
->devname
, c
->subarray
, c
->verbose
);
1726 case UpdateSubarray
:
1727 if (c
->update
== NULL
) {
1728 pr_err("-U/--update must be specified with --update-subarray\n");
1732 rv
|= Update_subarray(dv
->devname
, c
->subarray
,
1733 c
->update
, ident
, c
->verbose
);
1736 mdfd
= open_mddev(dv
->devname
, 1);
1738 switch(dv
->disposition
) {
1740 rv
|= Manage_runstop(dv
->devname
, mdfd
, 1, c
->verbose
, 0); break;
1742 rv
|= Manage_runstop(dv
->devname
, mdfd
, -1, c
->verbose
, 0); break;
1744 rv
|= Manage_ro(dv
->devname
, mdfd
, 1); break;
1746 rv
|= Manage_ro(dv
->devname
, mdfd
, -1); break;