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
33 * All handling for the 0.90.0 version superblock is in
36 * - finding, loading, and writing the superblock.
37 * - initialising a new superblock
38 * - printing the superblock for --examine
39 * - printing part of the superblock for --detail
44 static unsigned long calc_sb0_csum(mdp_super_t
*super
)
46 unsigned long csum
= super
->sb_csum
;
47 unsigned long newcsum
;
49 newcsum
= calc_csum(super
, MD_SB_BYTES
);
50 super
->sb_csum
= csum
;
55 void super0_swap_endian(struct mdp_superblock_s
*sb
)
57 /* as super0 superblocks are host-endian, it is sometimes
58 * useful to be able to swap the endianness
59 * as (almost) everything is u32's we byte-swap every 4byte
61 * We then also have to swap the events_hi and events_lo
63 char *sbc
= (char *)sb
;
67 for (i
=0; i
< MD_SB_BYTES
; i
+=4) {
76 sb
->events_hi
= sb
->events_lo
;
79 t32
= sb
->cp_events_hi
;
80 sb
->cp_events_hi
= sb
->cp_events_lo
;
81 sb
->cp_events_lo
= t32
;
87 static void examine_super0(void *sbv
)
89 mdp_super_t
*sb
= sbv
;
94 printf(" Magic : %08x\n", sb
->md_magic
);
95 printf(" Version : %02d.%02d.%02d\n", sb
->major_version
, sb
->minor_version
,
97 if (sb
->minor_version
>= 90)
98 printf(" UUID : %08x:%08x:%08x:%08x\n", sb
->set_uuid0
, sb
->set_uuid1
,
99 sb
->set_uuid2
, sb
->set_uuid3
);
101 printf(" UUID : %08x\n", sb
->set_uuid0
);
104 printf(" Creation Time : %.24s\n", ctime(&atime
));
105 c
=map_num(pers
, sb
->level
);
106 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
107 if ((int)sb
->level
>= 0) {
109 printf(" Device Size : %d%s\n", sb
->size
, human_size((long long)sb
->size
<<10));
111 case 1: ddsks
=1;break;
113 case 5: ddsks
= sb
->raid_disks
-1; break;
114 case 6: ddsks
= sb
->raid_disks
-2; break;
115 case 10: ddsks
= sb
->raid_disks
/ (sb
->layout
&255) / ((sb
->layout
>>8)&255);
118 printf(" Array Size : %llu%s\n", (unsigned long long)ddsks
* sb
->size
,
119 human_size(ddsks
*(long long)sb
->size
<<10));
121 printf(" Raid Devices : %d\n", sb
->raid_disks
);
122 printf(" Total Devices : %d\n", sb
->nr_disks
);
123 printf("Preferred Minor : %d\n", sb
->md_minor
);
125 if (sb
->minor_version
> 90 && (sb
->reshape_position
+1) != 0) {
126 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)sb
->reshape_position
/2, human_size((long long)sb
->reshape_position
<<9));
127 if (sb
->delta_disks
) {
128 printf(" Delta Devices : %d", sb
->delta_disks
);
130 printf(" (%d->%d)\n", sb
->raid_disks
-sb
->delta_disks
, sb
->raid_disks
);
132 printf(" (%d->%d)\n", sb
->raid_disks
, sb
->raid_disks
+sb
->delta_disks
);
134 if (sb
->new_level
!= sb
->level
) {
135 c
= map_num(pers
, sb
->new_level
);
136 printf(" New Level : %s\n", c
?c
:"-unknown-");
138 if (sb
->new_layout
!= sb
->layout
) {
139 if (sb
->level
== 5) {
140 c
= map_num(r5layout
, sb
->new_layout
);
141 printf(" New Layout : %s\n", c
?c
:"-unknown-");
143 if (sb
->level
== 10) {
144 printf(" New Layout : near=%d, %s=%d\n",
146 (sb
->new_layout
&0x10000)?"offset":"far",
147 (sb
->new_layout
>>8)&255);
150 if (sb
->new_chunk
!= sb
->chunk_size
)
151 printf(" New Chunksize : %d\n", sb
->new_chunk
);
155 printf(" Update Time : %.24s\n", ctime(&atime
));
156 printf(" State : %s\n",
157 (sb
->state
&(1<<MD_SB_CLEAN
))?"clean":"active");
158 if (sb
->state
& (1<<MD_SB_BITMAP_PRESENT
))
159 printf("Internal Bitmap : present\n");
160 printf(" Active Devices : %d\n", sb
->active_disks
);
161 printf("Working Devices : %d\n", sb
->working_disks
);
162 printf(" Failed Devices : %d\n", sb
->failed_disks
);
163 printf(" Spare Devices : %d\n", sb
->spare_disks
);
164 if (calc_sb0_csum(sb
) == sb
->sb_csum
)
165 printf(" Checksum : %x - correct\n", sb
->sb_csum
);
167 printf(" Checksum : %x - expected %lx\n", sb
->sb_csum
, calc_sb0_csum(sb
));
168 printf(" Events : %d.%d\n", sb
->events_hi
, sb
->events_lo
);
170 if (sb
->level
== 5) {
171 c
= map_num(r5layout
, sb
->layout
);
172 printf(" Layout : %s\n", c
?c
:"-unknown-");
174 if (sb
->level
== 10) {
175 printf(" Layout : near=%d, %s=%d\n",
177 (sb
->layout
&0x10000)?"offset":"far",
178 (sb
->layout
>>8)&255);
184 printf(" Chunk Size : %dK\n", sb
->chunk_size
/1024);
187 printf(" Rounding : %dK\n", sb
->chunk_size
/1024);
192 printf(" Number Major Minor RaidDevice State\n");
193 for (d
= -1; d
<(signed int)(sb
->raid_disks
+sb
->spare_disks
); d
++) {
198 if (d
>=0) dp
= &sb
->disks
[d
];
199 else dp
= &sb
->this_disk
;
200 snprintf(nb
, sizeof(nb
), "%4d", d
);
201 printf("%4s %5d %5d %5d %5d ", d
< 0 ? "this" : nb
,
202 dp
->number
, dp
->major
, dp
->minor
, dp
->raid_disk
);
203 wonly
= dp
->state
& (1<<MD_DISK_WRITEMOSTLY
);
204 dp
->state
&= ~(1<<MD_DISK_WRITEMOSTLY
);
205 if (dp
->state
& (1<<MD_DISK_FAULTY
)) printf(" faulty");
206 if (dp
->state
& (1<<MD_DISK_ACTIVE
)) printf(" active");
207 if (dp
->state
& (1<<MD_DISK_SYNC
)) printf(" sync");
208 if (dp
->state
& (1<<MD_DISK_REMOVED
)) printf(" removed");
209 if (wonly
) printf(" write-mostly");
210 if (dp
->state
== 0) printf(" spare");
211 if ((dv
=map_dev(dp
->major
, dp
->minor
, 0)))
214 if (d
== -1) printf("\n");
218 static void brief_examine_super0(void *sbv
)
220 mdp_super_t
*sb
= sbv
;
221 char *c
=map_num(pers
, sb
->level
);
223 printf("ARRAY %s level=%s num-devices=%d UUID=",
224 get_md_name(sb
->md_minor
),
225 c
?c
:"-unknown-", sb
->raid_disks
);
226 if (sb
->minor_version
>= 90)
227 printf("%08x:%08x:%08x:%08x", sb
->set_uuid0
, sb
->set_uuid1
,
228 sb
->set_uuid2
, sb
->set_uuid3
);
230 printf("%08x", sb
->set_uuid0
);
234 static void detail_super0(void *sbv
)
236 mdp_super_t
*sb
= sbv
;
238 if (sb
->minor_version
>= 90)
239 printf("%08x:%08x:%08x:%08x", sb
->set_uuid0
, sb
->set_uuid1
,
240 sb
->set_uuid2
, sb
->set_uuid3
);
242 printf("%08x", sb
->set_uuid0
);
243 printf("\n Events : %d.%d\n\n", sb
->events_hi
, sb
->events_lo
);
246 static void brief_detail_super0(void *sbv
)
248 mdp_super_t
*sb
= sbv
;
250 if (sb
->minor_version
>= 90)
251 printf("%08x:%08x:%08x:%08x", sb
->set_uuid0
, sb
->set_uuid1
,
252 sb
->set_uuid2
, sb
->set_uuid3
);
254 printf("%08x", sb
->set_uuid0
);
257 static void uuid_from_super0(int uuid
[4], void * sbv
)
259 mdp_super_t
*super
= sbv
;
260 uuid
[0] = super
->set_uuid0
;
261 if (super
->minor_version
>= 90) {
262 uuid
[1] = super
->set_uuid1
;
263 uuid
[2] = super
->set_uuid2
;
264 uuid
[3] = super
->set_uuid3
;
272 static void getinfo_super0(struct mdinfo
*info
, void *sbv
)
274 mdp_super_t
*sb
= sbv
;
278 info
->array
.major_version
= sb
->major_version
;
279 info
->array
.minor_version
= sb
->minor_version
;
280 info
->array
.patch_version
= sb
->patch_version
;
281 info
->array
.raid_disks
= sb
->raid_disks
;
282 info
->array
.level
= sb
->level
;
283 info
->array
.layout
= sb
->layout
;
284 info
->array
.md_minor
= sb
->md_minor
;
285 info
->array
.ctime
= sb
->ctime
;
286 info
->array
.utime
= sb
->utime
;
287 info
->array
.chunk_size
= sb
->chunk_size
;
288 info
->component_size
= sb
->size
*2;
290 info
->disk
.state
= sb
->this_disk
.state
;
291 info
->disk
.major
= sb
->this_disk
.major
;
292 info
->disk
.minor
= sb
->this_disk
.minor
;
293 info
->disk
.raid_disk
= sb
->this_disk
.raid_disk
;
294 info
->disk
.number
= sb
->this_disk
.number
;
296 info
->events
= md_event(sb
);
297 info
->data_offset
= 0;
299 uuid_from_super0(info
->uuid
, sbv
);
301 if (sb
->minor_version
> 90 && (sb
->reshape_position
+1) != 0) {
302 info
->reshape_active
= 1;
303 info
->reshape_progress
= sb
->reshape_position
;
304 info
->new_level
= sb
->new_level
;
305 info
->delta_disks
= sb
->delta_disks
;
306 info
->new_layout
= sb
->new_layout
;
307 info
->new_chunk
= sb
->new_chunk
;
309 info
->reshape_active
= 0;
312 /* work_disks is calculated rather than read directly */
313 for (i
=0; i
< MD_SB_DISKS
; i
++)
314 if ((sb
->disks
[i
].state
& (1<<MD_DISK_SYNC
)) &&
315 (sb
->disks
[i
].state
& (1<<MD_DISK_ACTIVE
)) &&
316 !(sb
->disks
[i
].state
& (1<<MD_DISK_FAULTY
)))
318 info
->array
.working_disks
= working
;
322 static int update_super0(struct mdinfo
*info
, void *sbv
, char *update
, char *devname
, int verbose
)
324 /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
325 * For others, the return value is ignored.
328 mdp_super_t
*sb
= sbv
;
329 if (strcmp(update
, "sparc2.2")==0 ) {
330 /* 2.2 sparc put the events in the wrong place
331 * So we copy the tail of the superblock
332 * up 4 bytes before continuing
334 __u32
*sb32
= (__u32
*)sb
;
335 memcpy(sb32
+MD_SB_GENERIC_CONSTANT_WORDS
+7,
336 sb32
+MD_SB_GENERIC_CONSTANT_WORDS
+7+1,
337 (MD_SB_WORDS
- (MD_SB_GENERIC_CONSTANT_WORDS
+7+1))*4);
339 fprintf (stderr
, Name
": adjusting superblock of %s for 2.2/sparc compatability.\n",
342 if (strcmp(update
, "super-minor") ==0) {
343 sb
->md_minor
= info
->array
.md_minor
;
345 fprintf(stderr
, Name
": updating superblock of %s with minor number %d\n",
346 devname
, info
->array
.md_minor
);
348 if (strcmp(update
, "summaries") == 0) {
350 /* set nr_disks, active_disks, working_disks,
351 * failed_disks, spare_disks based on disks[]
352 * array in superblock.
353 * Also make sure extra slots aren't 'failed'
355 sb
->nr_disks
= sb
->active_disks
=
356 sb
->working_disks
= sb
->failed_disks
=
358 for (i
=0; i
< MD_SB_DISKS
; i
++)
359 if (sb
->disks
[i
].major
||
360 sb
->disks
[i
].minor
) {
361 int state
= sb
->disks
[i
].state
;
362 if (state
& (1<<MD_DISK_REMOVED
))
365 if (state
& (1<<MD_DISK_ACTIVE
))
367 if (state
& (1<<MD_DISK_FAULTY
))
373 } else if (i
>= sb
->raid_disks
&& sb
->disks
[i
].number
== 0)
374 sb
->disks
[i
].state
= 0;
376 if (strcmp(update
, "force")==0) {
377 __u32 ehi
= sb
->events_hi
, elo
= sb
->events_lo
;
378 sb
->events_hi
= (info
->events
>>32) & 0xFFFFFFFF;
379 sb
->events_lo
= (info
->events
) & 0xFFFFFFFF;
380 if (sb
->events_hi
!= ehi
||
381 sb
->events_lo
!= elo
)
383 if ((sb
->level
== 5 || sb
->level
== 4 || sb
->level
== 6) &&
384 (sb
->state
& (1 << MD_SB_CLEAN
)) == 0) {
385 /* need to force clean */
386 sb
->state
|= (1 << MD_SB_CLEAN
);
390 if (strcmp(update
, "assemble")==0) {
391 int d
= info
->disk
.number
;
392 int wonly
= sb
->disks
[d
].state
& (1<<MD_DISK_WRITEMOSTLY
);
393 if ((sb
->disks
[d
].state
& ~(1<<MD_DISK_WRITEMOSTLY
))
394 != info
->disk
.state
) {
395 sb
->disks
[d
].state
= info
->disk
.state
| wonly
;
399 if (strcmp(update
, "newdev") == 0) {
400 int d
= info
->disk
.number
;
401 memset(&sb
->disks
[d
], 0, sizeof(sb
->disks
[d
]));
402 sb
->disks
[d
].number
= d
;
403 sb
->disks
[d
].major
= info
->disk
.major
;
404 sb
->disks
[d
].minor
= info
->disk
.minor
;
405 sb
->disks
[d
].raid_disk
= info
->disk
.raid_disk
;
406 sb
->disks
[d
].state
= info
->disk
.state
;
407 sb
->this_disk
= sb
->disks
[d
];
409 if (strcmp(update
, "grow") == 0) {
410 sb
->raid_disks
= info
->array
.raid_disks
;
411 sb
->nr_disks
= info
->array
.nr_disks
;
412 sb
->active_disks
= info
->array
.active_disks
;
413 sb
->working_disks
= info
->array
.working_disks
;
414 memset(&sb
->disks
[info
->disk
.number
], 0, sizeof(sb
->disks
[0]));
415 sb
->disks
[info
->disk
.number
].number
= info
->disk
.number
;
416 sb
->disks
[info
->disk
.number
].major
= info
->disk
.major
;
417 sb
->disks
[info
->disk
.number
].minor
= info
->disk
.minor
;
418 sb
->disks
[info
->disk
.number
].raid_disk
= info
->disk
.raid_disk
;
419 sb
->disks
[info
->disk
.number
].state
= info
->disk
.state
;
420 if (sb
->this_disk
.number
== info
->disk
.number
)
421 sb
->this_disk
= sb
->disks
[info
->disk
.number
];
423 if (strcmp(update
, "resync") == 0) {
424 /* make sure resync happens */
425 sb
->state
&= ~(1<<MD_SB_CLEAN
);
428 if (strcmp(update
, "uuid") == 0) {
429 sb
->set_uuid0
= info
->uuid
[0];
430 sb
->set_uuid1
= info
->uuid
[1];
431 sb
->set_uuid2
= info
->uuid
[2];
432 sb
->set_uuid3
= info
->uuid
[3];
433 if (sb
->state
& (1<<MD_SB_BITMAP_PRESENT
)) {
434 struct bitmap_super_s
*bm
;
435 bm
= (struct bitmap_super_s
*)(sb
+1);
436 uuid_from_super0((int*)bm
->uuid
, sbv
);
439 if (strcmp(update
, "_reshape_progress")==0)
440 sb
->reshape_position
= info
->reshape_progress
;
442 sb
->sb_csum
= calc_sb0_csum(sb
);
446 static __u64
event_super0(void *sbv
)
448 mdp_super_t
*sb
= sbv
;
454 static int init_super0(struct supertype
*st
, void **sbp
, mdu_array_info_t
*info
, unsigned long long size
, char *ignored_name
)
456 mdp_super_t
*sb
= malloc(MD_SB_BYTES
+ sizeof(bitmap_super_t
));
459 memset(sb
, 0, MD_SB_BYTES
+ sizeof(bitmap_super_t
));
461 if (info
->major_version
== -1) {
462 /* zeroing the superblock */
466 spares
= info
->working_disks
- info
->active_disks
;
467 if (info
->raid_disks
+ spares
> MD_SB_DISKS
) {
468 fprintf(stderr
, Name
": too many devices requested: %d+%d > %d\n",
469 info
->raid_disks
, spares
, MD_SB_DISKS
);
473 rfd
= open("/dev/urandom", O_RDONLY
);
474 sb
->md_magic
= MD_SB_MAGIC
;
475 sb
->major_version
= 0;
476 sb
->minor_version
= 90;
477 sb
->patch_version
= 0;
478 sb
->gvalid_words
= 0; /* ignored */
479 if (rfd
< 0 || read(rfd
, &sb
->set_uuid0
, 4) != 4)
480 sb
->set_uuid0
= random();
482 sb
->level
= info
->level
;
483 if (size
!= info
->size
)
485 sb
->size
= info
->size
;
486 sb
->nr_disks
= info
->nr_disks
;
487 sb
->raid_disks
= info
->raid_disks
;
488 sb
->md_minor
= info
->md_minor
;
489 sb
->not_persistent
= 0;
490 if (rfd
< 0 || read(rfd
, &sb
->set_uuid1
, 12) != 12) {
491 sb
->set_uuid1
= random();
492 sb
->set_uuid2
= random();
493 sb
->set_uuid3
= random();
498 sb
->utime
= sb
->ctime
;
499 sb
->state
= info
->state
;
500 sb
->active_disks
= info
->active_disks
;
501 sb
->working_disks
= info
->working_disks
;
502 sb
->failed_disks
= info
->failed_disks
;
503 sb
->spare_disks
= info
->spare_disks
;
507 sb
->layout
= info
->layout
;
508 sb
->chunk_size
= info
->chunk_size
;
514 /* Add a device to the superblock being created */
515 static void add_to_super0(void *sbv
, mdu_disk_info_t
*dinfo
)
517 mdp_super_t
*sb
= sbv
;
518 mdp_disk_t
*dk
= &sb
->disks
[dinfo
->number
];
520 dk
->number
= dinfo
->number
;
521 dk
->major
= dinfo
->major
;
522 dk
->minor
= dinfo
->minor
;
523 dk
->raid_disk
= dinfo
->raid_disk
;
524 dk
->state
= dinfo
->state
;
527 static int store_super0(struct supertype
*st
, int fd
, void *sbv
)
530 unsigned long long dsize
;
531 unsigned long long offset
;
532 mdp_super_t
*super
= sbv
;
535 if (ioctl(fd
, BLKGETSIZE64
, &dsize
) != 0)
538 if (ioctl(fd
, BLKGETSIZE
, &size
))
541 dsize
= ((unsigned long long)size
)<<9;
544 if (dsize
< MD_RESERVED_SECTORS
*2*512)
547 offset
= MD_NEW_SIZE_SECTORS(dsize
>>9);
551 if (lseek64(fd
, offset
, 0)< 0LL)
554 if (write(fd
, super
, sizeof(*super
)) != sizeof(*super
))
557 if (super
->state
& (1<<MD_SB_BITMAP_PRESENT
)) {
558 struct bitmap_super_s
* bm
= (struct bitmap_super_s
*)(super
+1);
559 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
)
560 write(fd
, bm
, sizeof(*bm
));
567 static int write_init_super0(struct supertype
*st
, void *sbv
, mdu_disk_info_t
*dinfo
, char *devname
)
569 mdp_super_t
*sb
= sbv
;
570 int fd
= open(devname
, O_RDWR
|O_EXCL
);
574 fprintf(stderr
, Name
": Failed to open %s to write superblock\n", devname
);
578 sb
->disks
[dinfo
->number
].state
&= ~(1<<MD_DISK_FAULTY
);
579 sb
->disks
[dinfo
->number
].state
|= (1<<MD_DISK_SYNC
);
581 sb
->this_disk
= sb
->disks
[dinfo
->number
];
582 sb
->sb_csum
= calc_sb0_csum(sb
);
583 rv
= store_super0(st
, fd
, sb
);
585 if (rv
== 0 && (sb
->state
& (1<<MD_SB_BITMAP_PRESENT
)))
586 rv
= st
->ss
->write_bitmap(st
, fd
, sbv
);
590 fprintf(stderr
, Name
": failed to write superblock to %s\n", devname
);
594 static int compare_super0(void **firstp
, void *secondv
)
598 * 0 same, or first was empty, and second was copied
599 * 1 second had wrong number
603 mdp_super_t
*first
= *firstp
;
604 mdp_super_t
*second
= secondv
;
606 int uuid1
[4], uuid2
[4];
607 if (second
->md_magic
!= MD_SB_MAGIC
)
610 first
= malloc(MD_SB_BYTES
+ sizeof(struct bitmap_super_s
));
611 memcpy(first
, second
, MD_SB_BYTES
+ sizeof(struct bitmap_super_s
));
616 uuid_from_super0(uuid1
, first
);
617 uuid_from_super0(uuid2
, second
);
618 if (!same_uuid(uuid1
, uuid2
, 0))
620 if (first
->major_version
!= second
->major_version
||
621 first
->minor_version
!= second
->minor_version
||
622 first
->patch_version
!= second
->patch_version
||
623 first
->gvalid_words
!= second
->gvalid_words
||
624 first
->ctime
!= second
->ctime
||
625 first
->level
!= second
->level
||
626 first
->size
!= second
->size
||
627 first
->raid_disks
!= second
->raid_disks
)
634 static int load_super0(struct supertype
*st
, int fd
, void **sbp
, char *devname
)
636 /* try to read in the superblock
639 * 1 on cannot get superblock
640 * 2 on superblock meaningless
643 unsigned long long dsize
;
644 unsigned long long offset
;
647 struct bitmap_super_s
*bsb
;
650 if (ioctl(fd
, BLKGETSIZE64
, &dsize
) != 0)
653 if (ioctl(fd
, BLKGETSIZE
, &size
)) {
655 fprintf(stderr
, Name
": cannot find device size for %s: %s\n",
656 devname
, strerror(errno
));
662 if (dsize
< MD_RESERVED_SECTORS
*2) {
664 fprintf(stderr
, Name
": %s is too small for md: size is %ld sectors.\n",
669 offset
= MD_NEW_SIZE_SECTORS(dsize
>>9);
673 ioctl(fd
, BLKFLSBUF
, 0); /* make sure we read current data */
675 if (lseek64(fd
, offset
, 0)< 0LL) {
677 fprintf(stderr
, Name
": Cannot seek to superblock on %s: %s\n",
678 devname
, strerror(errno
));
682 super
= malloc(MD_SB_BYTES
+ sizeof(bitmap_super_t
));
684 if (read(fd
, super
, sizeof(*super
)) != MD_SB_BYTES
) {
686 fprintf(stderr
, Name
": Cannot read superblock on %s\n",
692 if (st
->ss
&& st
->minor_version
== 9)
693 super0_swap_endian(super
);
695 if (super
->md_magic
!= MD_SB_MAGIC
) {
697 fprintf(stderr
, Name
": No super block found on %s (Expected magic %08x, got %08x)\n",
698 devname
, MD_SB_MAGIC
, super
->md_magic
);
703 if (super
->major_version
!= 0) {
705 fprintf(stderr
, Name
": Cannot interpret superblock on %s - version is %d\n",
706 devname
, super
->major_version
);
711 if (st
->ss
== NULL
) {
713 st
->minor_version
= 90;
714 st
->max_devs
= MD_SB_DISKS
;
717 /* Now check on the bitmap superblock */
718 if ((super
->state
& (1<<MD_SB_BITMAP_PRESENT
)) == 0)
720 /* Read the bitmap superblock and make sure it looks
721 * valid. If it doesn't clear the bit. An --assemble --force
722 * should get that written out.
724 if (read(fd
, super
+1, sizeof(struct bitmap_super_s
))
725 != sizeof(struct bitmap_super_s
))
728 uuid_from_super0(uuid
, super
);
729 bsb
= (struct bitmap_super_s
*)(super
+1);
730 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
731 memcmp(bsb
->uuid
, uuid
, 16) != 0)
736 super
->state
&= ~(1<<MD_SB_BITMAP_PRESENT
);
741 static struct supertype
*match_metadata_desc0(char *arg
)
743 struct supertype
*st
= malloc(sizeof(*st
));
747 st
->minor_version
= 90;
748 st
->max_devs
= MD_SB_DISKS
;
749 if (strcmp(arg
, "0") == 0 ||
750 strcmp(arg
, "0.90") == 0 ||
751 strcmp(arg
, "default") == 0
755 st
->minor_version
= 9; /* flag for 'byte-swapped' */
756 if (strcmp(arg
, "0.swap")==0)
763 static __u64
avail_size0(struct supertype
*st
, __u64 devsize
)
765 if (devsize
< MD_RESERVED_SECTORS
*2)
767 return MD_NEW_SIZE_SECTORS(devsize
);
770 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
)
773 * The bitmap comes immediately after the superblock and must be 60K in size
774 * at most. The default size is between 30K and 60K
776 * size is in sectors, chunk is in bytes !!!
778 unsigned long long bits
;
779 unsigned long long max_bits
= 60*1024*8;
780 unsigned long long min_chunk
;
781 mdp_super_t
*sb
= sbv
;
782 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MD_SB_BYTES
);
785 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
786 bits
= (size
* 512) / min_chunk
+ 1;
787 while (bits
> max_bits
) {
793 else if (chunk
< min_chunk
)
794 return 0; /* chunk size too small */
796 sb
->state
|= (1<<MD_SB_BITMAP_PRESENT
);
798 memset(bms
, 0, sizeof(*bms
));
799 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
800 bms
->version
= __cpu_to_le32(major
);
801 uuid_from_super0((int*)bms
->uuid
, sb
);
802 bms
->chunksize
= __cpu_to_le32(chunk
);
803 bms
->daemon_sleep
= __cpu_to_le32(delay
);
804 bms
->sync_size
= __cpu_to_le64(size
);
805 bms
->write_behind
= __cpu_to_le32(write_behind
);
811 void locate_bitmap0(struct supertype
*st
, int fd
, void *sbv
)
813 unsigned long long dsize
;
815 unsigned long long offset
;
817 if (ioctl(fd
, BLKGETSIZE64
, &dsize
) != 0)
820 if (ioctl(fd
, BLKGETSIZE
, &size
))
823 dsize
= ((unsigned long long)size
)<<9;
826 if (dsize
< MD_RESERVED_SECTORS
*2)
829 offset
= MD_NEW_SIZE_SECTORS(dsize
>>9);
833 offset
+= MD_SB_BYTES
;
835 lseek64(fd
, offset
, 0);
838 int write_bitmap0(struct supertype
*st
, int fd
, void *sbv
)
841 unsigned long long dsize
;
842 unsigned long long offset
;
843 mdp_super_t
*sb
= sbv
;
851 if (ioctl(fd
, BLKGETSIZE64
, &dsize
) != 0)
854 if (ioctl(fd
, BLKGETSIZE
, &size
))
857 dsize
= ((unsigned long long)size
)<<9;
860 if (dsize
< MD_RESERVED_SECTORS
*2)
863 offset
= MD_NEW_SIZE_SECTORS(dsize
>>9);
867 if (lseek64(fd
, offset
+ 4096, 0)< 0LL)
871 if (write(fd
, ((char*)sb
)+MD_SB_BYTES
, sizeof(bitmap_super_t
)) !=
872 sizeof(bitmap_super_t
))
874 towrite
= 64*1024 - MD_SB_BYTES
- sizeof(bitmap_super_t
);
875 memset(buf
, 0xff, sizeof(buf
));
876 while (towrite
> 0) {
880 n
= write(fd
, buf
, n
);
893 struct superswitch super0
= {
895 .examine_super
= examine_super0
,
896 .brief_examine_super
= brief_examine_super0
,
897 .detail_super
= detail_super0
,
898 .brief_detail_super
= brief_detail_super0
,
900 .uuid_from_super
= uuid_from_super0
,
901 .getinfo_super
= getinfo_super0
,
902 .update_super
= update_super0
,
903 .event_super
= event_super0
,
904 .init_super
= init_super0
,
905 .add_to_super
= add_to_super0
,
906 .store_super
= store_super0
,
907 .write_init_super
= write_init_super0
,
908 .compare_super
= compare_super0
,
909 .load_super
= load_super0
,
910 .match_metadata_desc
= match_metadata_desc0
,
911 .avail_size
= avail_size0
,
912 .add_internal_bitmap
= add_internal_bitmap0
,
913 .locate_bitmap
= locate_bitmap0
,
914 .write_bitmap
= write_bitmap0
,