2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2006 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@cse.unsw.edu.au>
24 * School of Computer Science and Engineering
25 * The University of New South Wales
32 #include <openssl/sha.h> /* for SHA1 */
34 extern unsigned char *SHA1(unsigned char *buf
, int len
, unsigned char *dest
);
37 * All handling for the 0.90.0 version superblock is in
40 * - finding, loading, and writing the superblock.
41 * - initialising a new superblock
42 * - printing the superblock for --examine
43 * - printing part of the superblock for --detail
48 static unsigned long calc_sb0_csum(mdp_super_t
*super
)
50 unsigned long csum
= super
->sb_csum
;
51 unsigned long newcsum
;
53 newcsum
= calc_csum(super
, MD_SB_BYTES
);
54 super
->sb_csum
= csum
;
59 void super0_swap_endian(struct mdp_superblock_s
*sb
)
61 /* as super0 superblocks are host-endian, it is sometimes
62 * useful to be able to swap the endianness
63 * as (almost) everything is u32's we byte-swap every 4byte
65 * We then also have to swap the events_hi and events_lo
67 char *sbc
= (char *)sb
;
71 for (i
=0; i
< MD_SB_BYTES
; i
+=4) {
80 sb
->events_hi
= sb
->events_lo
;
83 t32
= sb
->cp_events_hi
;
84 sb
->cp_events_hi
= sb
->cp_events_lo
;
85 sb
->cp_events_lo
= t32
;
91 static void examine_super0(void *sbv
, char *homehost
)
93 mdp_super_t
*sb
= sbv
;
98 printf(" Magic : %08x\n", sb
->md_magic
);
99 printf(" Version : %02d.%02d.%02d\n", sb
->major_version
, sb
->minor_version
,
101 if (sb
->minor_version
>= 90) {
102 printf(" UUID : %08x:%08x:%08x:%08x", sb
->set_uuid0
, sb
->set_uuid1
,
103 sb
->set_uuid2
, sb
->set_uuid3
);
105 unsigned char *hash
= SHA1((unsigned char *)homehost
,
108 if (memcmp(&sb
->set_uuid2
, hash
, 8)==0)
109 printf(" (local to host %s)", homehost
);
113 printf(" UUID : %08x\n", sb
->set_uuid0
);
116 printf(" Creation Time : %.24s\n", ctime(&atime
));
117 c
=map_num(pers
, sb
->level
);
118 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
119 if ((int)sb
->level
>= 0) {
121 printf(" Device Size : %d%s\n", sb
->size
, human_size((long long)sb
->size
<<10));
123 case 1: ddsks
=1;break;
125 case 5: ddsks
= sb
->raid_disks
-1; break;
126 case 6: ddsks
= sb
->raid_disks
-2; break;
127 case 10: ddsks
= sb
->raid_disks
/ (sb
->layout
&255) / ((sb
->layout
>>8)&255);
130 printf(" Array Size : %llu%s\n", (unsigned long long)ddsks
* sb
->size
,
131 human_size(ddsks
*(long long)sb
->size
<<10));
133 printf(" Raid Devices : %d\n", sb
->raid_disks
);
134 printf(" Total Devices : %d\n", sb
->nr_disks
);
135 printf("Preferred Minor : %d\n", sb
->md_minor
);
137 if (sb
->minor_version
> 90 && (sb
->reshape_position
+1) != 0) {
138 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)sb
->reshape_position
/2, human_size((long long)sb
->reshape_position
<<9));
139 if (sb
->delta_disks
) {
140 printf(" Delta Devices : %d", sb
->delta_disks
);
142 printf(" (%d->%d)\n", sb
->raid_disks
-sb
->delta_disks
, sb
->raid_disks
);
144 printf(" (%d->%d)\n", sb
->raid_disks
, sb
->raid_disks
+sb
->delta_disks
);
146 if (sb
->new_level
!= sb
->level
) {
147 c
= map_num(pers
, sb
->new_level
);
148 printf(" New Level : %s\n", c
?c
:"-unknown-");
150 if (sb
->new_layout
!= sb
->layout
) {
151 if (sb
->level
== 5) {
152 c
= map_num(r5layout
, sb
->new_layout
);
153 printf(" New Layout : %s\n", c
?c
:"-unknown-");
155 if (sb
->level
== 10) {
156 printf(" New Layout : near=%d, %s=%d\n",
158 (sb
->new_layout
&0x10000)?"offset":"far",
159 (sb
->new_layout
>>8)&255);
162 if (sb
->new_chunk
!= sb
->chunk_size
)
163 printf(" New Chunksize : %d\n", sb
->new_chunk
);
167 printf(" Update Time : %.24s\n", ctime(&atime
));
168 printf(" State : %s\n",
169 (sb
->state
&(1<<MD_SB_CLEAN
))?"clean":"active");
170 if (sb
->state
& (1<<MD_SB_BITMAP_PRESENT
))
171 printf("Internal Bitmap : present\n");
172 printf(" Active Devices : %d\n", sb
->active_disks
);
173 printf("Working Devices : %d\n", sb
->working_disks
);
174 printf(" Failed Devices : %d\n", sb
->failed_disks
);
175 printf(" Spare Devices : %d\n", sb
->spare_disks
);
176 if (calc_sb0_csum(sb
) == sb
->sb_csum
)
177 printf(" Checksum : %x - correct\n", sb
->sb_csum
);
179 printf(" Checksum : %x - expected %lx\n", sb
->sb_csum
, calc_sb0_csum(sb
));
180 printf(" Events : %d.%d\n", sb
->events_hi
, sb
->events_lo
);
182 if (sb
->level
== 5) {
183 c
= map_num(r5layout
, sb
->layout
);
184 printf(" Layout : %s\n", c
?c
:"-unknown-");
186 if (sb
->level
== 10) {
187 printf(" Layout : near=%d, %s=%d\n",
189 (sb
->layout
&0x10000)?"offset":"far",
190 (sb
->layout
>>8)&255);
196 printf(" Chunk Size : %dK\n", sb
->chunk_size
/1024);
199 printf(" Rounding : %dK\n", sb
->chunk_size
/1024);
204 printf(" Number Major Minor RaidDevice State\n");
205 for (d
= -1; d
<(signed int)(sb
->raid_disks
+sb
->spare_disks
); d
++) {
210 if (d
>=0) dp
= &sb
->disks
[d
];
211 else dp
= &sb
->this_disk
;
212 snprintf(nb
, sizeof(nb
), "%4d", d
);
213 printf("%4s %5d %5d %5d %5d ", d
< 0 ? "this" : nb
,
214 dp
->number
, dp
->major
, dp
->minor
, dp
->raid_disk
);
215 wonly
= dp
->state
& (1<<MD_DISK_WRITEMOSTLY
);
216 dp
->state
&= ~(1<<MD_DISK_WRITEMOSTLY
);
217 if (dp
->state
& (1<<MD_DISK_FAULTY
)) printf(" faulty");
218 if (dp
->state
& (1<<MD_DISK_ACTIVE
)) printf(" active");
219 if (dp
->state
& (1<<MD_DISK_SYNC
)) printf(" sync");
220 if (dp
->state
& (1<<MD_DISK_REMOVED
)) printf(" removed");
221 if (wonly
) printf(" write-mostly");
222 if (dp
->state
== 0) printf(" spare");
223 if ((dv
=map_dev(dp
->major
, dp
->minor
, 0)))
226 if (d
== -1) printf("\n");
230 static void brief_examine_super0(void *sbv
)
232 mdp_super_t
*sb
= sbv
;
233 char *c
=map_num(pers
, sb
->level
);
237 sprintf(devname
, "/dev/md%d", sb
->md_minor
);
238 if (stat(devname
, &stb
) != 0) {
239 /* /dev/mdX doesn't exist, so use /dev/md/X */
240 sprintf(devname
, "/dev/md/%d", sb
->md_minor
);
243 printf("ARRAY %s level=%s num-devices=%d UUID=",
245 c
?c
:"-unknown-", sb
->raid_disks
);
246 if (sb
->minor_version
>= 90)
247 printf("%08x:%08x:%08x:%08x", sb
->set_uuid0
, sb
->set_uuid1
,
248 sb
->set_uuid2
, sb
->set_uuid3
);
250 printf("%08x", sb
->set_uuid0
);
254 static void detail_super0(void *sbv
, char *homehost
)
256 mdp_super_t
*sb
= sbv
;
258 if (sb
->minor_version
>= 90)
259 printf("%08x:%08x:%08x:%08x", sb
->set_uuid0
, sb
->set_uuid1
,
260 sb
->set_uuid2
, sb
->set_uuid3
);
262 printf("%08x", sb
->set_uuid0
);
264 unsigned char *hash
= SHA1((unsigned char *)homehost
,
267 if (memcmp(&sb
->set_uuid2
, hash
, 8)==0)
268 printf(" (local to host %s)", homehost
);
270 printf("\n Events : %d.%d\n\n", sb
->events_hi
, sb
->events_lo
);
273 static void brief_detail_super0(void *sbv
)
275 mdp_super_t
*sb
= sbv
;
277 if (sb
->minor_version
>= 90)
278 printf("%08x:%08x:%08x:%08x", sb
->set_uuid0
, sb
->set_uuid1
,
279 sb
->set_uuid2
, sb
->set_uuid3
);
281 printf("%08x", sb
->set_uuid0
);
285 static int match_home0(void *sbv
, char *homehost
)
287 mdp_super_t
*sb
= sbv
;
288 unsigned char *hash
= SHA1((unsigned char *)homehost
,
292 return (memcmp(&sb
->set_uuid2
, hash
, 8)==0);
295 static void uuid_from_super0(int uuid
[4], void * sbv
)
297 mdp_super_t
*super
= sbv
;
298 uuid
[0] = super
->set_uuid0
;
299 if (super
->minor_version
>= 90) {
300 uuid
[1] = super
->set_uuid1
;
301 uuid
[2] = super
->set_uuid2
;
302 uuid
[3] = super
->set_uuid3
;
310 static void getinfo_super0(struct mdinfo
*info
, void *sbv
)
312 mdp_super_t
*sb
= sbv
;
316 info
->array
.major_version
= sb
->major_version
;
317 info
->array
.minor_version
= sb
->minor_version
;
318 info
->array
.patch_version
= sb
->patch_version
;
319 info
->array
.raid_disks
= sb
->raid_disks
;
320 info
->array
.level
= sb
->level
;
321 info
->array
.layout
= sb
->layout
;
322 info
->array
.md_minor
= sb
->md_minor
;
323 info
->array
.ctime
= sb
->ctime
;
324 info
->array
.utime
= sb
->utime
;
325 info
->array
.chunk_size
= sb
->chunk_size
;
326 info
->component_size
= sb
->size
*2;
328 info
->disk
.state
= sb
->this_disk
.state
;
329 info
->disk
.major
= sb
->this_disk
.major
;
330 info
->disk
.minor
= sb
->this_disk
.minor
;
331 info
->disk
.raid_disk
= sb
->this_disk
.raid_disk
;
332 info
->disk
.number
= sb
->this_disk
.number
;
334 info
->events
= md_event(sb
);
335 info
->data_offset
= 0;
337 uuid_from_super0(info
->uuid
, sbv
);
339 if (sb
->minor_version
> 90 && (sb
->reshape_position
+1) != 0) {
340 info
->reshape_active
= 1;
341 info
->reshape_progress
= sb
->reshape_position
;
342 info
->new_level
= sb
->new_level
;
343 info
->delta_disks
= sb
->delta_disks
;
344 info
->new_layout
= sb
->new_layout
;
345 info
->new_chunk
= sb
->new_chunk
;
347 info
->reshape_active
= 0;
349 sprintf(info
->name
, "%d", sb
->md_minor
);
350 /* work_disks is calculated rather than read directly */
351 for (i
=0; i
< MD_SB_DISKS
; i
++)
352 if ((sb
->disks
[i
].state
& (1<<MD_DISK_SYNC
)) &&
353 (sb
->disks
[i
].state
& (1<<MD_DISK_ACTIVE
)) &&
354 !(sb
->disks
[i
].state
& (1<<MD_DISK_FAULTY
)))
356 info
->array
.working_disks
= working
;
360 static int update_super0(struct mdinfo
*info
, void *sbv
, char *update
,
361 char *devname
, int verbose
,
362 int uuid_set
, char *homehost
)
364 /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
365 * For others, the return value is ignored.
368 mdp_super_t
*sb
= sbv
;
369 if (strcmp(update
, "sparc2.2")==0 ) {
370 /* 2.2 sparc put the events in the wrong place
371 * So we copy the tail of the superblock
372 * up 4 bytes before continuing
374 __u32
*sb32
= (__u32
*)sb
;
375 memcpy(sb32
+MD_SB_GENERIC_CONSTANT_WORDS
+7,
376 sb32
+MD_SB_GENERIC_CONSTANT_WORDS
+7+1,
377 (MD_SB_WORDS
- (MD_SB_GENERIC_CONSTANT_WORDS
+7+1))*4);
379 fprintf (stderr
, Name
": adjusting superblock of %s for 2.2/sparc compatability.\n",
382 if (strcmp(update
, "super-minor") ==0) {
383 sb
->md_minor
= info
->array
.md_minor
;
385 fprintf(stderr
, Name
": updating superblock of %s with minor number %d\n",
386 devname
, info
->array
.md_minor
);
388 if (strcmp(update
, "summaries") == 0) {
390 /* set nr_disks, active_disks, working_disks,
391 * failed_disks, spare_disks based on disks[]
392 * array in superblock.
393 * Also make sure extra slots aren't 'failed'
395 sb
->nr_disks
= sb
->active_disks
=
396 sb
->working_disks
= sb
->failed_disks
=
398 for (i
=0; i
< MD_SB_DISKS
; i
++)
399 if (sb
->disks
[i
].major
||
400 sb
->disks
[i
].minor
) {
401 int state
= sb
->disks
[i
].state
;
402 if (state
& (1<<MD_DISK_REMOVED
))
405 if (state
& (1<<MD_DISK_ACTIVE
))
407 if (state
& (1<<MD_DISK_FAULTY
))
413 } else if (i
>= sb
->raid_disks
&& sb
->disks
[i
].number
== 0)
414 sb
->disks
[i
].state
= 0;
416 if (strcmp(update
, "force")==0) {
417 __u32 ehi
= sb
->events_hi
, elo
= sb
->events_lo
;
418 sb
->events_hi
= (info
->events
>>32) & 0xFFFFFFFF;
419 sb
->events_lo
= (info
->events
) & 0xFFFFFFFF;
420 if (sb
->events_hi
!= ehi
||
421 sb
->events_lo
!= elo
)
423 if ((sb
->level
== 5 || sb
->level
== 4 || sb
->level
== 6) &&
424 (sb
->state
& (1 << MD_SB_CLEAN
)) == 0) {
425 /* need to force clean */
426 sb
->state
|= (1 << MD_SB_CLEAN
);
430 if (strcmp(update
, "assemble")==0) {
431 int d
= info
->disk
.number
;
432 int wonly
= sb
->disks
[d
].state
& (1<<MD_DISK_WRITEMOSTLY
);
433 if ((sb
->disks
[d
].state
& ~(1<<MD_DISK_WRITEMOSTLY
))
434 != info
->disk
.state
) {
435 sb
->disks
[d
].state
= info
->disk
.state
| wonly
;
439 if (strcmp(update
, "newdev") == 0) {
440 int d
= info
->disk
.number
;
441 memset(&sb
->disks
[d
], 0, sizeof(sb
->disks
[d
]));
442 sb
->disks
[d
].number
= d
;
443 sb
->disks
[d
].major
= info
->disk
.major
;
444 sb
->disks
[d
].minor
= info
->disk
.minor
;
445 sb
->disks
[d
].raid_disk
= info
->disk
.raid_disk
;
446 sb
->disks
[d
].state
= info
->disk
.state
;
447 sb
->this_disk
= sb
->disks
[d
];
449 if (strcmp(update
, "grow") == 0) {
450 sb
->raid_disks
= info
->array
.raid_disks
;
451 sb
->nr_disks
= info
->array
.nr_disks
;
452 sb
->active_disks
= info
->array
.active_disks
;
453 sb
->working_disks
= info
->array
.working_disks
;
454 memset(&sb
->disks
[info
->disk
.number
], 0, sizeof(sb
->disks
[0]));
455 sb
->disks
[info
->disk
.number
].number
= info
->disk
.number
;
456 sb
->disks
[info
->disk
.number
].major
= info
->disk
.major
;
457 sb
->disks
[info
->disk
.number
].minor
= info
->disk
.minor
;
458 sb
->disks
[info
->disk
.number
].raid_disk
= info
->disk
.raid_disk
;
459 sb
->disks
[info
->disk
.number
].state
= info
->disk
.state
;
460 if (sb
->this_disk
.number
== info
->disk
.number
)
461 sb
->this_disk
= sb
->disks
[info
->disk
.number
];
463 if (strcmp(update
, "resync") == 0) {
464 /* make sure resync happens */
465 sb
->state
&= ~(1<<MD_SB_CLEAN
);
468 if (strcmp(update
, "homehost") == 0 &&
472 info
->uuid
[0] = sb
->set_uuid0
;
473 info
->uuid
[1] = sb
->set_uuid1
;
475 if (strcmp(update
, "uuid") == 0) {
476 if (!uuid_set
&& homehost
) {
477 unsigned char *hash
= SHA1((unsigned char*)homehost
,
480 memcpy(info
->uuid
+2, hash
, 8);
482 sb
->set_uuid0
= info
->uuid
[0];
483 sb
->set_uuid1
= info
->uuid
[1];
484 sb
->set_uuid2
= info
->uuid
[2];
485 sb
->set_uuid3
= info
->uuid
[3];
486 if (sb
->state
& (1<<MD_SB_BITMAP_PRESENT
)) {
487 struct bitmap_super_s
*bm
;
488 bm
= (struct bitmap_super_s
*)(sb
+1);
489 uuid_from_super0((int*)bm
->uuid
, sbv
);
492 if (strcmp(update
, "_reshape_progress")==0)
493 sb
->reshape_position
= info
->reshape_progress
;
495 sb
->sb_csum
= calc_sb0_csum(sb
);
499 static __u64
event_super0(void *sbv
)
501 mdp_super_t
*sb
= sbv
;
506 * For verion-0 superblock, the homehost is 'stored' in the
507 * uuid. 8 bytes for a hash of the host leaving 8 bytes
508 * of random material.
509 * We use the first 8 bytes (64bits) of the sha1 of the
514 static int init_super0(struct supertype
*st
, void **sbp
, mdu_array_info_t
*info
,
515 unsigned long long size
, char *ignored_name
, char *homehost
)
517 mdp_super_t
*sb
= malloc(MD_SB_BYTES
+ sizeof(bitmap_super_t
));
520 memset(sb
, 0, MD_SB_BYTES
+ sizeof(bitmap_super_t
));
522 if (info
->major_version
== -1) {
523 /* zeroing the superblock */
528 spares
= info
->working_disks
- info
->active_disks
;
529 if (info
->raid_disks
+ spares
> MD_SB_DISKS
) {
530 fprintf(stderr
, Name
": too many devices requested: %d+%d > %d\n",
531 info
->raid_disks
, spares
, MD_SB_DISKS
);
535 rfd
= open("/dev/urandom", O_RDONLY
);
536 sb
->md_magic
= MD_SB_MAGIC
;
537 sb
->major_version
= 0;
538 sb
->minor_version
= 90;
539 sb
->patch_version
= 0;
540 sb
->gvalid_words
= 0; /* ignored */
541 if (rfd
< 0 || read(rfd
, &sb
->set_uuid0
, 4) != 4)
542 sb
->set_uuid0
= random();
544 sb
->level
= info
->level
;
545 if (size
!= info
->size
)
547 sb
->size
= info
->size
;
548 sb
->nr_disks
= info
->nr_disks
;
549 sb
->raid_disks
= info
->raid_disks
;
550 sb
->md_minor
= info
->md_minor
;
551 sb
->not_persistent
= 0;
552 if (rfd
< 0 || read(rfd
, &sb
->set_uuid1
, 12) != 12) {
553 sb
->set_uuid1
= random();
554 sb
->set_uuid2
= random();
555 sb
->set_uuid3
= random();
560 unsigned char *hash
= SHA1((unsigned char*)homehost
,
563 memcpy(&sb
->set_uuid2
, hash
, 8);
566 sb
->utime
= sb
->ctime
;
567 sb
->state
= info
->state
;
568 sb
->active_disks
= info
->active_disks
;
569 sb
->working_disks
= info
->working_disks
;
570 sb
->failed_disks
= info
->failed_disks
;
571 sb
->spare_disks
= info
->spare_disks
;
575 sb
->layout
= info
->layout
;
576 sb
->chunk_size
= info
->chunk_size
;
582 /* Add a device to the superblock being created */
583 static void add_to_super0(void *sbv
, mdu_disk_info_t
*dinfo
)
585 mdp_super_t
*sb
= sbv
;
586 mdp_disk_t
*dk
= &sb
->disks
[dinfo
->number
];
588 dk
->number
= dinfo
->number
;
589 dk
->major
= dinfo
->major
;
590 dk
->minor
= dinfo
->minor
;
591 dk
->raid_disk
= dinfo
->raid_disk
;
592 dk
->state
= dinfo
->state
;
595 static int store_super0(struct supertype
*st
, int fd
, void *sbv
)
598 unsigned long long dsize
;
599 unsigned long long offset
;
600 mdp_super_t
*super
= sbv
;
603 if (ioctl(fd
, BLKGETSIZE64
, &dsize
) != 0)
606 if (ioctl(fd
, BLKGETSIZE
, &size
))
609 dsize
= ((unsigned long long)size
)<<9;
612 if (dsize
< MD_RESERVED_SECTORS
*2*512)
615 offset
= MD_NEW_SIZE_SECTORS(dsize
>>9);
619 if (lseek64(fd
, offset
, 0)< 0LL)
622 if (write(fd
, super
, sizeof(*super
)) != sizeof(*super
))
625 if (super
->state
& (1<<MD_SB_BITMAP_PRESENT
)) {
626 struct bitmap_super_s
* bm
= (struct bitmap_super_s
*)(super
+1);
627 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
)
628 if (write(fd
, bm
, sizeof(*bm
)) != sizeof(*bm
))
636 static int write_init_super0(struct supertype
*st
, void *sbv
, mdu_disk_info_t
*dinfo
, char *devname
)
638 mdp_super_t
*sb
= sbv
;
639 int fd
= open(devname
, O_RDWR
|O_EXCL
);
643 fprintf(stderr
, Name
": Failed to open %s to write superblock\n", devname
);
647 sb
->disks
[dinfo
->number
].state
&= ~(1<<MD_DISK_FAULTY
);
648 sb
->disks
[dinfo
->number
].state
|= (1<<MD_DISK_SYNC
);
650 sb
->this_disk
= sb
->disks
[dinfo
->number
];
651 sb
->sb_csum
= calc_sb0_csum(sb
);
652 rv
= store_super0(st
, fd
, sb
);
654 if (rv
== 0 && (sb
->state
& (1<<MD_SB_BITMAP_PRESENT
)))
655 rv
= st
->ss
->write_bitmap(st
, fd
, sbv
);
659 fprintf(stderr
, Name
": failed to write superblock to %s\n", devname
);
663 static int compare_super0(void **firstp
, void *secondv
)
667 * 0 same, or first was empty, and second was copied
668 * 1 second had wrong number
672 mdp_super_t
*first
= *firstp
;
673 mdp_super_t
*second
= secondv
;
675 int uuid1
[4], uuid2
[4];
676 if (second
->md_magic
!= MD_SB_MAGIC
)
679 first
= malloc(MD_SB_BYTES
+ sizeof(struct bitmap_super_s
));
680 memcpy(first
, second
, MD_SB_BYTES
+ sizeof(struct bitmap_super_s
));
685 uuid_from_super0(uuid1
, first
);
686 uuid_from_super0(uuid2
, second
);
687 if (!same_uuid(uuid1
, uuid2
, 0))
689 if (first
->major_version
!= second
->major_version
||
690 first
->minor_version
!= second
->minor_version
||
691 first
->patch_version
!= second
->patch_version
||
692 first
->gvalid_words
!= second
->gvalid_words
||
693 first
->ctime
!= second
->ctime
||
694 first
->level
!= second
->level
||
695 first
->size
!= second
->size
||
696 first
->raid_disks
!= second
->raid_disks
)
703 static int load_super0(struct supertype
*st
, int fd
, void **sbp
, char *devname
)
705 /* try to read in the superblock
708 * 1 on cannot get superblock
709 * 2 on superblock meaningless
712 unsigned long long dsize
;
713 unsigned long long offset
;
716 struct bitmap_super_s
*bsb
;
719 if (ioctl(fd
, BLKGETSIZE64
, &dsize
) != 0)
722 if (ioctl(fd
, BLKGETSIZE
, &size
)) {
724 fprintf(stderr
, Name
": cannot find device size for %s: %s\n",
725 devname
, strerror(errno
));
731 if (dsize
< MD_RESERVED_SECTORS
*2) {
733 fprintf(stderr
, Name
": %s is too small for md: size is %ld sectors.\n",
738 offset
= MD_NEW_SIZE_SECTORS(dsize
>>9);
742 ioctl(fd
, BLKFLSBUF
, 0); /* make sure we read current data */
744 if (lseek64(fd
, offset
, 0)< 0LL) {
746 fprintf(stderr
, Name
": Cannot seek to superblock on %s: %s\n",
747 devname
, strerror(errno
));
751 super
= malloc(MD_SB_BYTES
+ sizeof(bitmap_super_t
));
753 if (read(fd
, super
, sizeof(*super
)) != MD_SB_BYTES
) {
755 fprintf(stderr
, Name
": Cannot read superblock on %s\n",
761 if (st
->ss
&& st
->minor_version
== 9)
762 super0_swap_endian(super
);
764 if (super
->md_magic
!= MD_SB_MAGIC
) {
766 fprintf(stderr
, Name
": No super block found on %s (Expected magic %08x, got %08x)\n",
767 devname
, MD_SB_MAGIC
, super
->md_magic
);
772 if (super
->major_version
!= 0) {
774 fprintf(stderr
, Name
": Cannot interpret superblock on %s - version is %d\n",
775 devname
, super
->major_version
);
780 if (st
->ss
== NULL
) {
782 st
->minor_version
= 90;
783 st
->max_devs
= MD_SB_DISKS
;
786 /* Now check on the bitmap superblock */
787 if ((super
->state
& (1<<MD_SB_BITMAP_PRESENT
)) == 0)
789 /* Read the bitmap superblock and make sure it looks
790 * valid. If it doesn't clear the bit. An --assemble --force
791 * should get that written out.
793 if (read(fd
, super
+1, sizeof(struct bitmap_super_s
))
794 != sizeof(struct bitmap_super_s
))
797 uuid_from_super0(uuid
, super
);
798 bsb
= (struct bitmap_super_s
*)(super
+1);
799 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
800 memcmp(bsb
->uuid
, uuid
, 16) != 0)
805 super
->state
&= ~(1<<MD_SB_BITMAP_PRESENT
);
810 static struct supertype
*match_metadata_desc0(char *arg
)
812 struct supertype
*st
= malloc(sizeof(*st
));
816 st
->minor_version
= 90;
817 st
->max_devs
= MD_SB_DISKS
;
818 if (strcmp(arg
, "0") == 0 ||
819 strcmp(arg
, "0.90") == 0 ||
820 strcmp(arg
, "default") == 0
824 st
->minor_version
= 9; /* flag for 'byte-swapped' */
825 if (strcmp(arg
, "0.swap")==0)
832 static __u64
avail_size0(struct supertype
*st
, __u64 devsize
)
834 if (devsize
< MD_RESERVED_SECTORS
*2)
836 return MD_NEW_SIZE_SECTORS(devsize
);
839 static int add_internal_bitmap0(struct supertype
*st
, void *sbv
, int chunk
, int delay
, int write_behind
, unsigned long long size
, int may_change
, int major
)
842 * The bitmap comes immediately after the superblock and must be 60K in size
843 * at most. The default size is between 30K and 60K
845 * size is in sectors, chunk is in bytes !!!
847 unsigned long long bits
;
848 unsigned long long max_bits
= 60*1024*8;
849 unsigned long long min_chunk
;
850 mdp_super_t
*sb
= sbv
;
851 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MD_SB_BYTES
);
854 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
855 bits
= (size
* 512) / min_chunk
+ 1;
856 while (bits
> max_bits
) {
862 else if (chunk
< min_chunk
)
863 return 0; /* chunk size too small */
865 sb
->state
|= (1<<MD_SB_BITMAP_PRESENT
);
867 memset(bms
, 0, sizeof(*bms
));
868 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
869 bms
->version
= __cpu_to_le32(major
);
870 uuid_from_super0((int*)bms
->uuid
, sb
);
871 bms
->chunksize
= __cpu_to_le32(chunk
);
872 bms
->daemon_sleep
= __cpu_to_le32(delay
);
873 bms
->sync_size
= __cpu_to_le64(size
);
874 bms
->write_behind
= __cpu_to_le32(write_behind
);
880 void locate_bitmap0(struct supertype
*st
, int fd
, void *sbv
)
882 unsigned long long dsize
;
884 unsigned long long offset
;
886 if (ioctl(fd
, BLKGETSIZE64
, &dsize
) != 0)
889 if (ioctl(fd
, BLKGETSIZE
, &size
))
892 dsize
= ((unsigned long long)size
)<<9;
895 if (dsize
< MD_RESERVED_SECTORS
*2)
898 offset
= MD_NEW_SIZE_SECTORS(dsize
>>9);
902 offset
+= MD_SB_BYTES
;
904 lseek64(fd
, offset
, 0);
907 int write_bitmap0(struct supertype
*st
, int fd
, void *sbv
)
910 unsigned long long dsize
;
911 unsigned long long offset
;
912 mdp_super_t
*sb
= sbv
;
920 if (ioctl(fd
, BLKGETSIZE64
, &dsize
) != 0)
923 if (ioctl(fd
, BLKGETSIZE
, &size
))
926 dsize
= ((unsigned long long)size
)<<9;
929 if (dsize
< MD_RESERVED_SECTORS
*2)
932 offset
= MD_NEW_SIZE_SECTORS(dsize
>>9);
936 if (lseek64(fd
, offset
+ 4096, 0)< 0LL)
940 if (write(fd
, ((char*)sb
)+MD_SB_BYTES
, sizeof(bitmap_super_t
)) !=
941 sizeof(bitmap_super_t
))
943 towrite
= 64*1024 - MD_SB_BYTES
- sizeof(bitmap_super_t
);
944 memset(buf
, 0xff, sizeof(buf
));
945 while (towrite
> 0) {
949 n
= write(fd
, buf
, n
);
962 struct superswitch super0
= {
964 .examine_super
= examine_super0
,
965 .brief_examine_super
= brief_examine_super0
,
966 .detail_super
= detail_super0
,
967 .brief_detail_super
= brief_detail_super0
,
969 .match_home
= match_home0
,
970 .uuid_from_super
= uuid_from_super0
,
971 .getinfo_super
= getinfo_super0
,
972 .update_super
= update_super0
,
973 .event_super
= event_super0
,
974 .init_super
= init_super0
,
975 .add_to_super
= add_to_super0
,
976 .store_super
= store_super0
,
977 .write_init_super
= write_init_super0
,
978 .compare_super
= compare_super0
,
979 .load_super
= load_super0
,
980 .match_metadata_desc
= match_metadata_desc0
,
981 .avail_size
= avail_size0
,
982 .add_internal_bitmap
= add_internal_bitmap0
,
983 .locate_bitmap
= locate_bitmap0
,
984 .write_bitmap
= write_bitmap0
,