2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2013 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.
32 static int scan_assemble(struct supertype
*ss
,
34 struct mddev_ident
*ident
);
35 static int misc_scan(char devmode
, struct context
*c
);
36 static int stop_scan(int verbose
);
37 static int misc_list(struct mddev_dev
*devlist
,
38 struct mddev_ident
*ident
,
40 struct supertype
*ss
, struct context
*c
);
41 const char Name
[] = "mdadm";
43 int main(int argc
, char *argv
[])
51 unsigned long long array_size
= 0;
52 unsigned long long data_offset
= INVALID_SECTORS
;
53 struct mddev_ident ident
;
54 char *configfile
= NULL
;
57 struct mddev_dev
*devlist
= NULL
;
58 struct mddev_dev
**devlistend
= & devlist
;
61 char *symlinks
= NULL
;
62 int grow_continue
= 0;
63 /* autof indicates whether and how to create device node.
64 * bottom 3 bits are style. Rest (when shifted) are number of parts
66 * 1 - don't create (no)
67 * 2 - if is_standard, then create (yes)
68 * 3 - create as 'md' - reject is_standard mdp (md)
69 * 4 - create as 'mdp' - reject is_standard md (mdp)
70 * 5 - default to md if not is_standard (md in config file)
71 * 6 - default to mdp if not is_standard (part, or mdp in config file)
74 .require_homehost
= 1,
79 .bitmap_chunk
= UnSet
,
82 char sys_hostname
[256];
83 char *mailaddr
= NULL
;
89 int spare_sharing
= 1;
90 struct supertype
*ss
= NULL
;
92 char *shortopt
= short_options
;
95 char *remove_path
= NULL
;
96 char *udev_filename
= NULL
;
97 char *dump_directory
= NULL
;
104 srandom(time(0) ^ getpid());
108 ident
.raid_disks
= UnSet
;
109 ident
.super_minor
= UnSet
;
111 ident
.spare_group
= NULL
;
114 ident
.bitmap_fd
= -1;
115 ident
.bitmap_file
= NULL
;
117 ident
.container
= NULL
;
120 while ((option_index
= -1) ,
121 (opt
=getopt_long(argc
, argv
,
122 shortopt
, long_options
,
123 &option_index
)) != -1) {
125 /* firstly, some mode-independent options */
135 fputs(Version
, stderr
);
138 case 'v': c
.verbose
++;
141 case 'q': c
.verbose
--;
145 if (mode
== ASSEMBLE
|| mode
== BUILD
|| mode
== CREATE
146 || mode
== GROW
|| mode
== INCREMENTAL
148 break; /* b means bitmap */
153 case 'Y': c
.export
++;
157 if (strcasecmp(optarg
, "<ignore>") == 0)
158 c
.require_homehost
= 0;
164 /* Silently ignore old option */
170 if (asprintf(&c
.prefer
, "/%s/", optarg
) <= 0)
176 fputs(Usage
, stderr
);
179 /* second, figure out the mode.
180 * Some options force the mode. Others
181 * set the mode if it isn't already
187 shortopt
= short_bitmap_options
;
198 case ReAdd
: /* re-add */
201 shortopt
= short_bitmap_options
;
205 case 'A': newmode
= ASSEMBLE
;
206 shortopt
= short_bitmap_auto_options
;
208 case 'B': newmode
= BUILD
;
209 shortopt
= short_bitmap_auto_options
;
211 case 'C': newmode
= CREATE
;
212 shortopt
= short_bitmap_auto_options
;
214 case 'F': newmode
= MONITOR
;
216 case 'G': newmode
= GROW
;
217 shortopt
= short_bitmap_options
;
219 case 'I': newmode
= INCREMENTAL
;
220 shortopt
= short_bitmap_auto_options
;
223 newmode
= AUTODETECT
;
258 if (mode
&& newmode
== mode
) {
259 /* everybody happy ! */
260 } else if (mode
&& newmode
!= mode
) {
263 if (option_index
>= 0)
264 fprintf(stderr
, "--%s", long_options
[option_index
].name
);
266 fprintf(stderr
, "-%c", opt
);
267 fprintf(stderr
, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
268 map_num(modes
, newmode
),
269 map_num(modes
, mode
));
271 } else if (!mode
&& newmode
) {
273 if (mode
== MISC
&& devs_found
) {
274 pr_err("No action given for %s in --misc mode\n",
276 cont_err("Action options must come before device names\n");
280 /* special case of -c --help */
281 if ((opt
== 'c' || opt
== ConfigFile
) &&
282 ( strncmp(optarg
, "--h", 3)==0 ||
283 strncmp(optarg
, "-h", 2)==0)) {
284 fputs(Help_config
, stdout
);
288 /* If first option is a device, don't force the mode yet */
290 if (devs_found
== 0) {
291 dv
= xmalloc(sizeof(*dv
));
292 dv
->devname
= optarg
;
293 dv
->disposition
= devmode
;
294 dv
->writemostly
= writemostly
;
298 devlistend
= &dv
->next
;
303 /* No mode yet, and this is the second device ... */
304 pr_err("An option must be given to set the mode before a second device\n"
305 " (%s) is listed\n", optarg
);
308 if (option_index
>= 0)
309 pr_err("--%s", long_options
[option_index
].name
);
312 fprintf(stderr
, " does not set the mode, and so cannot be the first option.\n");
316 /* if we just set the mode, then done */
330 /* an undecorated option - must be a device name.
333 if (devs_found
> 0 && devmode
== DetailPlatform
) {
334 pr_err("controller may only be specified once. %s ignored\n",
339 if (devs_found
> 0 && mode
== MANAGE
&& !devmode
) {
340 pr_err("Must give one of -a/-r/-f for subsequent devices at %s\n", optarg
);
343 if (devs_found
> 0 && mode
== GROW
&& !devmode
) {
344 pr_err("Must give -a/--add for devices to add: %s\n", optarg
);
347 dv
= xmalloc(sizeof(*dv
));
348 dv
->devname
= optarg
;
349 dv
->disposition
= devmode
;
350 dv
->writemostly
= writemostly
;
354 devlistend
= &dv
->next
;
360 /* We've got a mode, and opt is now something else which
361 * could depend on the mode */
362 #define O(a,b) ((a<<16)|b)
363 switch (O(mode
,opt
)) {
365 case O(GROW
,ChunkSize
):
367 case O(CREATE
,ChunkSize
):
368 case O(BUILD
,'c'): /* chunk or rounding */
369 case O(BUILD
,ChunkSize
): /* chunk or rounding */
371 pr_err("chunk/rounding may only be specified once. 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 */
419 case O(BUILD
,'z'): /* size */
421 pr_err("size may only be specified once. Second value is %s.\n", optarg
);
424 if (strcmp(optarg
, "max")==0)
427 s
.size
= parse_size(optarg
);
428 if (s
.size
== INVALID_SECTORS
||
430 pr_err("invalid size: %s\n",
434 /* convert sectors to K */
439 case O(GROW
,'Z'): /* array size */
440 if (array_size
> 0) {
441 pr_err("array-size may only be specified once. Second value is %s.\n", optarg
);
444 if (strcmp(optarg
, "max") == 0)
445 array_size
= MAX_SIZE
;
447 array_size
= parse_size(optarg
);
448 if (array_size
== 0 ||
449 array_size
== INVALID_SECTORS
) {
450 pr_err("invalid array size: %s\n",
457 case O(CREATE
,DataOffset
):
458 case O(GROW
,DataOffset
):
459 if (data_offset
!= INVALID_SECTORS
) {
460 pr_err("data-offset may only be specified one. Second value is %s.\n", optarg
);
463 if (mode
== CREATE
&&
464 strcmp(optarg
, "variable") == 0)
465 data_offset
= VARIABLE_OFFSET
;
467 data_offset
= parse_size(optarg
);
468 if (data_offset
== INVALID_SECTORS
) {
469 pr_err("invalid data-offset: %s\n",
477 case O(BUILD
,'l'): /* set raid level*/
478 if (s
.level
!= UnSet
) {
479 pr_err("raid level may only be set once. Second value is %s.\n", optarg
);
482 s
.level
= map_name(pers
, optarg
);
483 if (s
.level
== UnSet
) {
484 pr_err("invalid raid level: %s\n",
488 if (s
.level
!= 0 && s
.level
!= LEVEL_LINEAR
&& s
.level
!= 1 &&
489 s
.level
!= LEVEL_MULTIPATH
&& s
.level
!= LEVEL_FAULTY
&&
492 pr_err("Raid level %s not permitted with --build.\n",
496 if (s
.sparedisks
> 0 && s
.level
< 1 && s
.level
>= -1) {
497 pr_err("raid level %s is incompatible with spare-devices setting.\n",
501 ident
.level
= s
.level
;
504 case O(GROW
, 'p'): /* new layout */
505 case O(GROW
, Layout
):
507 pr_err("layout may only be sent once. Second value was %s\n", optarg
);
510 s
.layout_str
= optarg
;
511 /* 'Grow' will parse the value */
514 case O(CREATE
,'p'): /* raid5 layout */
515 case O(CREATE
,Layout
):
516 case O(BUILD
,'p'): /* faulty layout */
517 case O(BUILD
,Layout
):
518 if (s
.layout
!= UnSet
) {
519 pr_err("layout may only be sent once. Second value was %s\n", optarg
);
524 pr_err("layout not meaningful for %s arrays.\n",
525 map_num(pers
, s
.level
));
528 pr_err("raid level must be given before layout.\n");
532 s
.layout
= map_name(r5layout
, optarg
);
533 if (s
.layout
==UnSet
) {
534 pr_err("layout %s not understood for raid5.\n",
540 s
.layout
= map_name(r6layout
, optarg
);
541 if (s
.layout
==UnSet
) {
542 pr_err("layout %s not understood for raid6.\n",
549 s
.layout
= parse_layout_10(optarg
);
551 pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg
);
559 s
.layout
= parse_layout_faulty(optarg
);
560 if (s
.layout
== -1) {
561 pr_err("layout %s not understood for faulty.\n",
569 case O(CREATE
,AssumeClean
):
570 case O(BUILD
,AssumeClean
): /* assume clean */
571 case O(GROW
,AssumeClean
):
577 case O(BUILD
,'n'): /* number of raid disks */
579 pr_err("raid-devices set twice: %d and %s\n",
580 s
.raiddisks
, optarg
);
583 s
.raiddisks
= parse_num(optarg
);
584 if (s
.raiddisks
<= 0) {
585 pr_err("invalid number of raid devices: %s\n",
589 ident
.raid_disks
= s
.raiddisks
;
591 case O(CREATE
, Nodes
):
592 c
.nodes
= parse_num(optarg
);
594 pr_err("invalid number for the number of cluster nodes: %s\n",
599 case O(CREATE
,'x'): /* number of spare (eXtra) disks */
601 pr_err("spare-devices set twice: %d and %s\n",
602 s
.sparedisks
, optarg
);
605 if (s
.level
!= UnSet
&& s
.level
<= 0 && s
.level
>= -1) {
606 pr_err("spare-devices setting is incompatible with raid level %d\n",
610 s
.sparedisks
= parse_num(optarg
);
611 if (s
.sparedisks
< 0) {
612 pr_err("invalid number of spare-devices: %s\n",
622 case O(INCREMENTAL
,'a'):
623 case O(INCREMENTAL
,Auto
):
624 case O(ASSEMBLE
,'a'):
625 case O(ASSEMBLE
,Auto
): /* auto-creation of device node */
626 c
.autof
= parse_auto(optarg
, "--auto flag", 0);
629 case O(CREATE
,Symlinks
):
630 case O(BUILD
,Symlinks
):
631 case O(ASSEMBLE
,Symlinks
): /* auto creation of symlinks in /dev to /dev/md */
635 case O(BUILD
,'f'): /* force honouring '-n 1' */
636 case O(BUILD
,Force
): /* force honouring '-n 1' */
637 case O(GROW
,'f'): /* ditto */
638 case O(GROW
,Force
): /* ditto */
639 case O(CREATE
,'f'): /* force honouring of device list */
640 case O(CREATE
,Force
): /* force honouring of device list */
641 case O(ASSEMBLE
,'f'): /* force assembly */
642 case O(ASSEMBLE
,Force
): /* force assembly */
643 case O(MISC
,'f'): /* force zero */
644 case O(MISC
,Force
): /* force zero */
645 case O(MANAGE
,Force
): /* add device which is too large */
648 /* now for the Assemble options */
649 case O(ASSEMBLE
, FreezeReshape
): /* Freeze reshape during
651 case O(INCREMENTAL
, FreezeReshape
):
652 c
.freeze_reshape
= 1;
654 case O(CREATE
,'u'): /* uuid of array */
655 case O(ASSEMBLE
,'u'): /* uuid of array */
656 if (ident
.uuid_set
) {
657 pr_err("uuid cannot be set twice. Second value %s.\n", optarg
);
660 if (parse_uuid(optarg
, ident
.uuid
))
663 pr_err("Bad uuid: %s\n", optarg
);
669 case O(ASSEMBLE
,'N'):
672 pr_err("name cannot be set twice. Second value %s.\n", optarg
);
675 if (mode
== MISC
&& !c
.subarray
) {
676 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
679 if (strlen(optarg
) > 32) {
680 pr_err("name '%s' is too long, 32 chars max.\n",
684 strcpy(ident
.name
, optarg
);
687 case O(ASSEMBLE
,'m'): /* super-minor for array */
688 case O(ASSEMBLE
,SuperMinor
):
689 if (ident
.super_minor
!= UnSet
) {
690 pr_err("super-minor cannot be set twice. Second value: %s.\n", optarg
);
693 if (strcmp(optarg
, "dev")==0)
694 ident
.super_minor
= -2;
696 ident
.super_minor
= parse_num(optarg
);
697 if (ident
.super_minor
< 0) {
698 pr_err("Bad super-minor number: %s.\n", optarg
);
704 case O(ASSEMBLE
,'o'):
710 case O(ASSEMBLE
,'U'): /* update the superblock */
713 pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
717 if (mode
== MISC
&& !c
.subarray
) {
718 pr_err("Only subarrays can be updated in misc mode\n");
722 if (strcmp(c
.update
, "sparc2.2")==0)
724 if (strcmp(c
.update
, "super-minor") == 0)
726 if (strcmp(c
.update
, "summaries")==0)
728 if (strcmp(c
.update
, "resync")==0)
730 if (strcmp(c
.update
, "uuid")==0)
732 if (strcmp(c
.update
, "name")==0)
734 if (strcmp(c
.update
, "homehost")==0)
736 if (strcmp(c
.update
, "devicesize")==0)
738 if (strcmp(c
.update
, "no-bitmap")==0)
740 if (strcmp(c
.update
, "bbl") == 0)
742 if (strcmp(c
.update
, "no-bbl") == 0)
744 if (strcmp(c
.update
, "metadata") == 0)
746 if (strcmp(c
.update
, "revert-reshape") == 0)
748 if (strcmp(c
.update
, "byteorder")==0) {
750 pr_err("must not set metadata type with --update=byteorder.\n");
753 for(i
=0; !ss
&& superlist
[i
]; i
++)
754 ss
= superlist
[i
]->match_metadata_desc(
757 pr_err("INTERNAL ERROR cannot find 0.swap\n");
763 if (strcmp(c
.update
,"?") == 0 ||
764 strcmp(c
.update
, "help") == 0) {
766 fprintf(outf
, "%s: ", Name
);
770 "%s: '--update=%s' is invalid. ",
773 fprintf(outf
, "Valid --update options are:\n"
774 " 'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
775 " 'summaries', 'homehost', 'byteorder', 'devicesize',\n"
776 " 'no-bitmap', 'metadata', 'revert-reshape'\n"
779 exit(outf
== stdout
? 0 : 2);
782 /* update=devicesize is allowed with --re-add */
783 if (devmode
!= 'A') {
784 pr_err("--update in Manage mode only allowed with --re-add.\n");
788 pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
793 if (strcmp(c
.update
, "devicesize") != 0 &&
794 strcmp(c
.update
, "bbl") != 0 &&
795 strcmp(c
.update
, "no-bbl") != 0) {
796 pr_err("only 'devicesize', 'bbl' and 'no-bbl' can be updated with --re-add\n");
801 case O(INCREMENTAL
,NoDegraded
):
802 pr_err("--no-degraded is deprecated in Incremental mode\n");
803 case O(ASSEMBLE
,NoDegraded
): /* --no-degraded */
804 c
.runstop
= -1; /* --stop isn't allowed for --assemble,
805 * so we overload slightly */
808 case O(ASSEMBLE
,'c'):
809 case O(ASSEMBLE
,ConfigFile
):
810 case O(INCREMENTAL
, 'c'):
811 case O(INCREMENTAL
, ConfigFile
):
813 case O(MISC
, ConfigFile
):
815 case O(MONITOR
,ConfigFile
):
816 case O(CREATE
,ConfigFile
):
818 pr_err("configfile cannot be set twice. Second value is %s.\n", optarg
);
822 set_conffile(configfile
);
823 /* FIXME possibly check that config file exists. Even parse it */
825 case O(ASSEMBLE
,'s'): /* scan */
828 case O(INCREMENTAL
,'s'):
832 case O(MONITOR
,'m'): /* mail address */
833 case O(MONITOR
,EMail
):
835 pr_err("only specify one mailaddress. %s ignored.\n",
841 case O(MONITOR
,'p'): /* alert program */
842 case O(MONITOR
,ProgramOpt
): /* alert program */
844 pr_err("only specify one alter program. %s ignored.\n",
850 case O(MONITOR
,'r'): /* rebuild increments */
851 case O(MONITOR
,Increment
):
852 increments
= atoi(optarg
);
853 if (increments
> 99 || increments
< 1) {
854 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
859 case O(MONITOR
,'d'): /* delay in seconds */
861 case O(BUILD
,'d'): /* delay for bitmap updates */
864 pr_err("only specify delay once. %s ignored.\n",
867 c
.delay
= parse_num(optarg
);
869 pr_err("invalid delay: %s\n",
875 case O(MONITOR
,'f'): /* daemonise */
876 case O(MONITOR
,Fork
):
879 case O(MONITOR
,'i'): /* pid */
881 pr_err("only specify one pid file. %s ignored.\n",
886 case O(MONITOR
,'1'): /* oneshot */
890 case O(MONITOR
,'t'): /* test */
893 case O(MONITOR
,'y'): /* log messages to syslog */
894 openlog("mdadm", LOG_PID
, SYSLOG_FACILITY
);
897 case O(MONITOR
, NoSharing
):
901 /* now the general management options. Some are applicable
902 * to other modes. None have arguments.
907 case O(MANAGE
,Add
): /* add a drive */
910 case O(MANAGE
,AddSpare
): /* add drive - never re-add */
913 case O(MANAGE
,ReAdd
):
916 case O(MANAGE
,'r'): /* remove a drive */
917 case O(MANAGE
,Remove
):
920 case O(MANAGE
,'f'): /* set faulty */
922 case O(INCREMENTAL
,'f'):
923 case O(INCREMENTAL
,Remove
):
924 case O(INCREMENTAL
,Fail
): /* r for incremental is taken, use f
925 * even though we will both fail and
926 * remove the device */
929 case O(MANAGE
,Replace
):
930 /* Mark these devices for replacement */
934 /* These are the replacements to use */
935 if (devmode
!= 'R') {
936 pr_err("--with must follow --replace\n");
941 case O(INCREMENTAL
,'R'):
943 case O(ASSEMBLE
,'R'):
945 case O(CREATE
,'R'): /* Run the array */
947 pr_err("Cannot both Stop and Run an array\n");
954 pr_err("Cannot both Run and Stop an array\n");
966 case O(MISC
,KillOpt
):
970 case O(MISC
, ExamineBB
):
974 case O(MISC
, WaitOpt
):
975 case O(MISC
, Waitclean
):
976 case O(MISC
, DetailPlatform
):
977 case O(MISC
, KillSubarray
):
978 case O(MISC
, UpdateSubarray
):
980 case O(MISC
, Restore
):
981 case O(MISC
,Action
):
982 if (opt
== KillSubarray
|| opt
== UpdateSubarray
) {
984 pr_err("subarray can only be specified once\n");
991 pr_err("Only one --action can be specified\n");
994 if (strcmp(optarg
, "idle") == 0 ||
995 strcmp(optarg
, "frozen") == 0 ||
996 strcmp(optarg
, "check") == 0 ||
997 strcmp(optarg
, "repair") == 0)
1000 pr_err("action must be one of idle, frozen, check, repair\n");
1004 if (devmode
&& devmode
!= opt
&&
1005 (devmode
== 'E' || (opt
== 'E' && devmode
!= 'Q'))) {
1006 pr_err("--examine/-E cannot be given with ");
1007 if (devmode
== 'E') {
1008 if (option_index
>= 0)
1009 fprintf(stderr
, "--%s\n",
1010 long_options
[option_index
].name
);
1012 fprintf(stderr
, "-%c\n", opt
);
1013 } else if (isalpha(devmode
))
1014 fprintf(stderr
, "-%c\n", devmode
);
1016 fprintf(stderr
, "previous option\n");
1020 if (opt
== Dump
|| opt
== Restore
) {
1021 if (dump_directory
!= NULL
) {
1022 pr_err("dump/restore directory specified twice: %s and %s\n",
1023 dump_directory
, optarg
);
1026 dump_directory
= optarg
;
1029 case O(MISC
, UdevRules
):
1030 if (devmode
&& devmode
!= opt
) {
1031 pr_err("--udev-rules must be the only option.\n");
1034 pr_err("only specify one udev rule filename. %s ignored.\n",
1037 udev_filename
= optarg
;
1045 case O(MISC
, Sparc22
):
1046 if (devmode
!= 'E') {
1047 pr_err("--sparc2.2 only allowed with --examine\n");
1053 case O(ASSEMBLE
,'b'): /* here we simply set the bitmap file */
1054 case O(ASSEMBLE
,Bitmap
):
1056 pr_err("bitmap file needed with -b in --assemble mode\n");
1059 if (strcmp(optarg
, "internal")==0) {
1060 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1063 bitmap_fd
= open(optarg
, O_RDWR
);
1064 if (!*optarg
|| bitmap_fd
< 0) {
1065 pr_err("cannot open bitmap file %s: %s\n", optarg
, strerror(errno
));
1068 ident
.bitmap_fd
= bitmap_fd
; /* for Assemble */
1071 case O(ASSEMBLE
, BackupFile
):
1072 case O(GROW
, BackupFile
):
1073 /* Specify a file into which grow might place a backup,
1074 * or from which assemble might recover a backup
1076 if (c
.backup_file
) {
1077 pr_err("backup file already specified, rejecting %s\n", optarg
);
1080 c
.backup_file
= optarg
;
1083 case O(GROW
, Continue
):
1084 /* Continue interrupted grow
1088 case O(ASSEMBLE
, InvalidBackup
):
1089 /* Acknowledge that the backupfile is invalid, but ask
1090 * to continue anyway
1092 c
.invalid_backup
= 1;
1096 case O(BUILD
,Bitmap
):
1098 case O(CREATE
,Bitmap
): /* here we create the bitmap */
1100 case O(GROW
,Bitmap
):
1101 if (strcmp(optarg
, "internal")== 0 ||
1102 strcmp(optarg
, "none")== 0 ||
1103 strchr(optarg
, '/') != NULL
) {
1104 s
.bitmap_file
= optarg
;
1107 if (strcmp(optarg
, "clustered")== 0) {
1108 s
.bitmap_file
= optarg
;
1109 /* Set the default number of cluster nodes
1110 * to 4 if not already set by user
1117 pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
1118 " not '%s'\n", optarg
);
1121 case O(GROW
,BitmapChunk
):
1122 case O(BUILD
,BitmapChunk
):
1123 case O(CREATE
,BitmapChunk
): /* bitmap chunksize */
1124 s
.bitmap_chunk
= parse_size(optarg
);
1125 if (s
.bitmap_chunk
== 0 ||
1126 s
.bitmap_chunk
== INVALID_SECTORS
||
1127 s
.bitmap_chunk
& (s
.bitmap_chunk
- 1)) {
1128 pr_err("invalid bitmap chunksize: %s\n",
1132 s
.bitmap_chunk
= s
.bitmap_chunk
* 512;
1135 case O(GROW
, WriteBehind
):
1136 case O(BUILD
, WriteBehind
):
1137 case O(CREATE
, WriteBehind
): /* write-behind mode */
1138 s
.write_behind
= DEFAULT_MAX_WRITE_BEHIND
;
1140 s
.write_behind
= parse_num(optarg
);
1141 if (s
.write_behind
< 0 ||
1142 s
.write_behind
> 16383) {
1143 pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg
);
1149 case O(INCREMENTAL
, 'r'):
1150 case O(INCREMENTAL
, RebuildMapOpt
):
1153 case O(INCREMENTAL
, IncrementalPath
):
1154 remove_path
= optarg
;
1157 /* We have now processed all the valid options. Anything else is
1160 if (option_index
> 0)
1161 pr_err(":option --%s not valid in %s mode\n",
1162 long_options
[option_index
].name
,
1163 map_num(modes
, mode
));
1165 pr_err("option -%c not valid in %s mode\n",
1166 opt
, map_num(modes
, mode
));
1173 if (print_help
== 2)
1174 help_text
= OptionHelp
;
1176 help_text
= mode_help
[mode
];
1177 if (help_text
== NULL
)
1179 fputs(help_text
,stdout
);
1183 if (!mode
&& devs_found
) {
1186 if (devlist
->disposition
== 0)
1187 devlist
->disposition
= devmode
;
1190 fputs(Usage
, stderr
);
1195 struct createinfo
*ci
= conf_get_create_info();
1197 if (strcasecmp(symlinks
, "yes") == 0)
1199 else if (strcasecmp(symlinks
, "no") == 0)
1202 pr_err("option --symlinks must be 'no' or 'yes'\n");
1206 /* Ok, got the option parsing out of the way
1207 * hopefully it's mostly right but there might be some stuff
1210 * That is mosty checked in the per-mode stuff but...
1212 * For @,B,C and A without -s, the first device listed must be
1213 * an md device. We check that here and open it.
1216 if (mode
== MANAGE
|| mode
== BUILD
|| mode
== CREATE
1218 || (mode
== ASSEMBLE
&& ! c
.scan
)) {
1219 if (devs_found
< 1) {
1220 pr_err("an md device must be given in this mode\n");
1223 if ((int)ident
.super_minor
== -2 && c
.autof
) {
1224 pr_err("--super-minor=dev is incompatible with --auto\n");
1227 if (mode
== MANAGE
|| mode
== GROW
) {
1228 mdfd
= open_mddev(devlist
->devname
, 1);
1232 /* non-existent device is OK */
1233 mdfd
= open_mddev(devlist
->devname
, 0);
1235 pr_err("device %s exists but is not an md array.\n", devlist
->devname
);
1238 if ((int)ident
.super_minor
== -2) {
1241 pr_err("--super-minor=dev given, and listed device %s doesn't exist.\n",
1246 ident
.super_minor
= minor(stb
.st_rdev
);
1248 if (mdfd
>= 0 && mode
!= MANAGE
&& mode
!= GROW
) {
1249 /* We don't really want this open yet, we just might
1250 * have wanted to check some things
1258 if (s
.raiddisks
== 1 && !c
.force
&& s
.level
!= LEVEL_FAULTY
) {
1259 pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1260 " a mistake. If you really mean it you will need to specify --force before\n"
1261 " setting the number of drives.\n");
1266 if (c
.homehost
== NULL
)
1267 c
.homehost
= conf_get_homehost(&c
.require_homehost
);
1268 if (c
.homehost
== NULL
|| strcasecmp(c
.homehost
, "<system>")==0) {
1269 if (gethostname(sys_hostname
, sizeof(sys_hostname
)) == 0) {
1270 sys_hostname
[sizeof(sys_hostname
)-1] = 0;
1271 c
.homehost
= sys_hostname
;
1274 if (c
.homehost
&& (!c
.homehost
[0] || strcasecmp(c
.homehost
, "<none>") == 0)) {
1276 c
.require_homehost
= 0;
1279 if (c
.backup_file
&& data_offset
!= INVALID_SECTORS
) {
1280 pr_err("--backup-file and --data-offset are incompatible\n");
1284 if ((mode
== MISC
&& devmode
== 'E')
1285 || (mode
== MONITOR
&& spare_sharing
== 0))
1286 /* Anyone may try this */;
1287 else if (geteuid() != 0) {
1288 pr_err("must be super-user to perform this action\n");
1292 ident
.autof
= c
.autof
;
1294 if (c
.scan
&& c
.verbose
< 2)
1295 /* --scan implied --brief unless -vv */
1301 /* readonly, add/remove, readwrite, runstop */
1303 rv
= Manage_ro(devlist
->devname
, mdfd
, c
.readonly
);
1304 if (!rv
&& devs_found
>1)
1305 rv
= Manage_subdevs(devlist
->devname
, mdfd
,
1306 devlist
->next
, c
.verbose
, c
.test
,
1308 if (!rv
&& c
.readonly
< 0)
1309 rv
= Manage_ro(devlist
->devname
, mdfd
, c
.readonly
);
1310 if (!rv
&& c
.runstop
> 0)
1311 rv
= Manage_run(devlist
->devname
, mdfd
, &c
);
1312 if (!rv
&& c
.runstop
< 0)
1313 rv
= Manage_stop(devlist
->devname
, mdfd
, c
.verbose
, 0);
1316 if (devs_found
== 1 && ident
.uuid_set
== 0 &&
1317 ident
.super_minor
== UnSet
&& ident
.name
[0] == 0 && !c
.scan
) {
1318 /* Only a device has been given, so get details from config file */
1319 struct mddev_ident
*array_ident
= conf_get_ident(devlist
->devname
);
1320 if (array_ident
== NULL
) {
1321 pr_err("%s not identified in config file.\n",
1327 if (array_ident
->autof
== 0)
1328 array_ident
->autof
= c
.autof
;
1329 rv
|= Assemble(ss
, devlist
->devname
, array_ident
,
1333 rv
= Assemble(ss
, devlist
->devname
, &ident
,
1335 else if (devs_found
> 0) {
1336 if (c
.update
&& devs_found
> 1) {
1337 pr_err("can only update a single array at a time\n");
1340 if (c
.backup_file
&& devs_found
> 1) {
1341 pr_err("can only assemble a single array when providing a backup file.\n");
1344 for (dv
= devlist
; dv
; dv
=dv
->next
) {
1345 struct mddev_ident
*array_ident
= conf_get_ident(dv
->devname
);
1346 if (array_ident
== NULL
) {
1347 pr_err("%s not identified in config file.\n",
1352 if (array_ident
->autof
== 0)
1353 array_ident
->autof
= c
.autof
;
1354 rv
|= Assemble(ss
, dv
->devname
, array_ident
,
1359 pr_err("--update not meaningful with a --scan assembly.\n");
1362 if (c
.backup_file
) {
1363 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1366 rv
= scan_assemble(ss
, &c
, &ident
);
1372 c
.delay
= DEFAULT_BITMAP_DELAY
;
1373 if (s
.write_behind
&& !s
.bitmap_file
) {
1374 pr_err("write-behind mode requires a bitmap.\n");
1378 if (s
.raiddisks
== 0) {
1379 pr_err("no raid-devices specified.\n");
1384 if (s
.bitmap_file
) {
1385 if (strcmp(s
.bitmap_file
, "internal")==0) {
1386 pr_err("'internal' bitmaps not supported with --build\n");
1391 rv
= Build(devlist
->devname
, devlist
->next
, &s
, &c
);
1395 c
.delay
= DEFAULT_BITMAP_DELAY
;
1398 if (!s
.bitmap_file
|| strcmp(s
.bitmap_file
, "clustered") != 0) {
1399 pr_err("--nodes argument only compatible with --bitmap=clustered\n");
1405 pr_err("--bitmap=clustered is currently supported with RAID mirror only\n");
1411 if (s
.write_behind
&& !s
.bitmap_file
) {
1412 pr_err("write-behind mode requires a bitmap.\n");
1416 if (s
.raiddisks
== 0) {
1417 pr_err("no raid-devices specified.\n");
1422 rv
= Create(ss
, devlist
->devname
,
1423 ident
.name
, ident
.uuid_set
? ident
.uuid
: NULL
,
1424 devs_found
-1, devlist
->next
,
1425 &s
, &c
, data_offset
);
1428 if (devmode
== 'E') {
1429 if (devlist
== NULL
&& !c
.scan
) {
1430 pr_err("No devices to examine\n");
1433 if (devlist
== NULL
)
1434 devlist
= conf_get_devs();
1435 if (devlist
== NULL
) {
1436 pr_err("No devices listed in %s\n", configfile
?configfile
:DefaultConfFile
);
1439 rv
= Examine(devlist
, &c
, ss
);
1440 } else if (devmode
== DetailPlatform
) {
1441 rv
= Detail_Platform(ss
? ss
->ss
: NULL
, ss
? c
.scan
: 1,
1442 c
.verbose
, c
.export
,
1443 devlist
? devlist
->devname
: NULL
);
1444 } else if (devlist
== NULL
) {
1445 if (devmode
== 'S' && c
.scan
)
1446 rv
= stop_scan(c
.verbose
);
1447 else if ((devmode
== 'D' || devmode
== Waitclean
) && c
.scan
)
1448 rv
= misc_scan(devmode
, &c
);
1449 else if (devmode
== UdevRules
)
1450 rv
= Write_rules(udev_filename
);
1452 pr_err("No devices given.\n");
1456 rv
= misc_list(devlist
, &ident
, dump_directory
, ss
, &c
);
1459 if (!devlist
&& !c
.scan
) {
1460 pr_err("Cannot monitor: need --scan or at least one device\n");
1464 if (pidfile
&& !daemonise
) {
1465 pr_err("Cannot write a pid file when not in daemon mode\n");
1470 if (get_linux_version() > 2006016)
1471 /* mdstat responds to poll */
1478 rv
= Monitor(devlist
, mailaddr
, program
,
1479 &c
, daemonise
, oneshot
,
1480 dosyslog
, pidfile
, increments
,
1485 if (array_size
> 0) {
1486 /* alway impose array size first, independent of
1488 * Do not allow level or raid_disks changes at the
1489 * same time as that can be irreversibly destructive.
1493 if (s
.raiddisks
|| s
.level
!= UnSet
) {
1494 pr_err("cannot change array size in same operation as changing raiddisks or level.\n"
1495 " Change size first, then check that data is still intact.\n");
1499 sysfs_init(&sra
, mdfd
, NULL
);
1500 if (array_size
== MAX_SIZE
)
1501 err
= sysfs_set_str(&sra
, NULL
, "array_size", "default");
1503 err
= sysfs_set_num(&sra
, NULL
, "array_size", array_size
/ 2);
1506 pr_err("--array-size setting is too large.\n");
1508 pr_err("current kernel does not support setting --array-size\n");
1513 if (devs_found
> 1 && s
.raiddisks
== 0 && s
.level
== UnSet
) {
1515 if (s
.size
> 0 || s
.chunk
|| s
.layout_str
!= NULL
|| s
.bitmap_file
) {
1516 pr_err("--add cannot be used with other geometry changes in --grow mode\n");
1520 for (dv
=devlist
->next
; dv
; dv
=dv
->next
) {
1521 rv
= Grow_Add_device(devlist
->devname
, mdfd
,
1526 } else if (s
.bitmap_file
) {
1527 if (s
.size
> 0 || s
.raiddisks
|| s
.chunk
||
1528 s
.layout_str
!= NULL
|| devs_found
> 1) {
1529 pr_err("--bitmap changes cannot be used with other geometry changes in --grow mode\n");
1534 c
.delay
= DEFAULT_BITMAP_DELAY
;
1535 rv
= Grow_addbitmap(devlist
->devname
, mdfd
, &c
, &s
);
1536 } else if (grow_continue
)
1537 rv
= Grow_continue_command(devlist
->devname
,
1538 mdfd
, c
.backup_file
,
1540 else if (s
.size
> 0 || s
.raiddisks
|| s
.layout_str
!= NULL
1541 || s
.chunk
!= 0 || s
.level
!= UnSet
1542 || data_offset
!= INVALID_SECTORS
) {
1543 rv
= Grow_reshape(devlist
->devname
, mdfd
,
1545 data_offset
, &c
, &s
);
1546 } else if (array_size
== 0)
1547 pr_err("no changes to --grow\n");
1556 pr_err("In --incremental mode, a device cannot be given with --scan.\n");
1559 if (c
.runstop
<= 0) {
1560 pr_err("--incremental --scan meaningless without --run.\n");
1563 if (devmode
== 'f') {
1564 pr_err("--incremental --scan --fail not supported.\n");
1567 rv
= IncrementalScan(&c
, NULL
);
1570 if (!rebuild_map
&& !c
.scan
) {
1571 pr_err("--incremental requires a device.\n");
1576 if (devmode
== 'f') {
1577 if (devlist
->next
) {
1578 pr_err("'--incremental --fail' can only handle one device.\n");
1582 rv
= IncrementalRemove(devlist
->devname
, remove_path
,
1585 rv
= Incremental(devlist
, &c
, ss
);
1594 static int scan_assemble(struct supertype
*ss
,
1596 struct mddev_ident
*ident
)
1598 struct mddev_ident
*a
, *array_list
= conf_get_ident(NULL
);
1599 struct mddev_dev
*devlist
= conf_get_devs();
1600 struct map_ent
*map
= NULL
;
1603 int failures
, successes
;
1605 if (conf_verify_devnames(array_list
)) {
1606 pr_err("Duplicate MD device names in conf file were found.\n");
1609 if (devlist
== NULL
) {
1610 pr_err("No devices listed in conf file were found.\n");
1613 for (a
= array_list
; a
; a
= a
->next
) {
1616 a
->autof
= c
->autof
;
1619 pr_err("failed to get exclusive lock on mapfile\n");
1624 for (a
= array_list
; a
; a
= a
->next
) {
1629 strcasecmp(a
->devname
, "<ignore>") == 0)
1632 r
= Assemble(ss
, a
->devname
,
1642 } while (failures
&& successes
);
1643 if (c
->homehost
&& cnt
== 0) {
1644 /* Maybe we can auto-assemble something.
1645 * Repeatedly call Assemble in auto-assemble mode
1650 ident
->autof
= c
->autof
;
1652 struct mddev_dev
*devlist
= conf_get_devs();
1655 rv2
= Assemble(ss
, NULL
,
1663 /* Incase there are stacked devices, we need to go around again */
1665 if (cnt
== 0 && rv
== 0) {
1666 pr_err("No arrays found in config file or automatically\n");
1670 } else if (cnt
== 0 && rv
== 0) {
1671 pr_err("No arrays found in config file\n");
1678 static int misc_scan(char devmode
, struct context
*c
)
1680 /* apply --detail or --wait-clean to
1681 * all devices in /proc/mdstat
1683 struct mdstat_ent
*ms
= mdstat_read(0, 1);
1684 struct mdstat_ent
*e
;
1685 struct map_ent
*map
= NULL
;
1689 for (members
= 0; members
<= 1; members
++) {
1690 for (e
=ms
; e
; e
=e
->next
) {
1694 int member
= e
->metadata_version
&&
1695 strncmp(e
->metadata_version
,
1696 "external:/", 10) == 0;
1697 if (members
!= member
)
1699 me
= map_by_devnm(&map
, e
->devnm
);
1701 && strcmp(me
->path
, "/unknown") != 0)
1704 stat(name
, &stb
) != 0)
1705 name
= get_md_name(e
->devnm
);
1708 pr_err("cannot find device file for %s\n",
1713 rv
|= Detail(name
, c
);
1715 rv
|= WaitClean(name
, -1, c
->verbose
);
1723 static int stop_scan(int verbose
)
1725 /* apply --stop to all devices in /proc/mdstat */
1726 /* Due to possible stacking of devices, repeat until
1727 * nothing more can be stopped
1729 int progress
=1, err
;
1733 struct mdstat_ent
*ms
= mdstat_read(0, 0);
1734 struct mdstat_ent
*e
;
1736 if (!progress
) last
= 1;
1737 progress
= 0; err
= 0;
1738 for (e
=ms
; e
; e
=e
->next
) {
1739 char *name
= get_md_name(e
->devnm
);
1743 pr_err("cannot find device file for %s\n",
1747 mdfd
= open_mddev(name
, 1);
1749 if (Manage_stop(name
, mdfd
, verbose
, !last
))
1759 } while (!last
&& err
);
1765 static int misc_list(struct mddev_dev
*devlist
,
1766 struct mddev_ident
*ident
,
1767 char *dump_directory
,
1768 struct supertype
*ss
, struct context
*c
)
1770 struct mddev_dev
*dv
;
1773 for (dv
=devlist
; dv
; dv
=(rv
& 16) ? NULL
: dv
->next
) {
1776 switch(dv
->disposition
) {
1778 rv
|= Detail(dv
->devname
, c
);
1780 case KillOpt
: /* Zero superblock */
1782 rv
|= Kill(dv
->devname
, ss
, c
->force
, c
->verbose
,0);
1786 rv
|= Kill(dv
->devname
, NULL
, c
->force
, v
, 0);
1793 rv
|= Query(dv
->devname
); continue;
1795 rv
|= ExamineBitmap(dv
->devname
, c
->brief
, ss
); continue;
1797 rv
|= ExamineBadblocks(dv
->devname
, c
->brief
, ss
); continue;
1800 rv
|= Wait(dv
->devname
); continue;
1802 rv
|= WaitClean(dv
->devname
, -1, c
->verbose
); continue;
1804 rv
|= Kill_subarray(dv
->devname
, c
->subarray
, c
->verbose
);
1806 case UpdateSubarray
:
1807 if (c
->update
== NULL
) {
1808 pr_err("-U/--update must be specified with --update-subarray\n");
1812 rv
|= Update_subarray(dv
->devname
, c
->subarray
,
1813 c
->update
, ident
, c
->verbose
);
1816 rv
|= Dump_metadata(dv
->devname
, dump_directory
, c
, ss
);
1819 rv
|= Restore_metadata(dv
->devname
, dump_directory
, c
, ss
,
1820 (dv
== devlist
&& dv
->next
== NULL
));
1823 rv
|= SetAction(dv
->devname
, c
->action
);
1826 if (dv
->devname
[0] == '/')
1827 mdfd
= open_mddev(dv
->devname
, 1);
1829 mdfd
= open_dev(dv
->devname
);
1831 pr_err("Cannot open %s\n", dv
->devname
);
1834 switch(dv
->disposition
) {
1837 rv
|= Manage_run(dv
->devname
, mdfd
, c
); break;
1839 rv
|= Manage_stop(dv
->devname
, mdfd
, c
->verbose
, 0); break;
1841 rv
|= Manage_ro(dv
->devname
, mdfd
, 1); break;
1843 rv
|= Manage_ro(dv
->devname
, mdfd
, -1); break;
1852 int SetAction(char *dev
, char *action
)
1854 int fd
= open(dev
, O_RDONLY
);
1857 pr_err("Couldn't open %s: %s\n", dev
, strerror(errno
));
1860 sysfs_init(&mdi
, fd
, NULL
);
1862 if (!mdi
.sys_name
[0]) {
1863 pr_err("%s is no an md array\n", dev
);
1867 if (sysfs_set_str(&mdi
, NULL
, "sync_action", action
) < 0) {
1868 pr_err("Count not set action for %s to %s: %s\n",
1869 dev
, action
, strerror(errno
));