2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2009 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>
27 * The version-1 superblock :
28 * All numeric fields are little-endian.
30 * total size: 256 bytes plus 2 per device.
31 * 1K allows 384 devices.
33 struct mdp_superblock_1
{
34 /* constant array information - 128 bytes */
35 __u32 magic
; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
36 __u32 major_version
; /* 1 */
37 __u32 feature_map
; /* 0 for now */
38 __u32 pad0
; /* always set to 0 when writing */
40 __u8 set_uuid
[16]; /* user-space generated. */
41 char set_name
[32]; /* set and interpreted by user-space */
43 __u64 ctime
; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
44 __u32 level
; /* -4 (multipath), -1 (linear), 0,1,4,5 */
45 __u32 layout
; /* only for raid5 currently */
46 __u64 size
; /* used size of component devices, in 512byte sectors */
48 __u32 chunksize
; /* in 512byte sectors */
50 __u32 bitmap_offset
; /* sectors after start of superblock that bitmap starts
51 * NOTE: signed, so bitmap can be before superblock
52 * only meaningful of feature_map[0] is set.
55 /* These are only valid with feature bit '4' */
56 __u32 new_level
; /* new level we are reshaping to */
57 __u64 reshape_position
; /* next address in array-space for reshape */
58 __u32 delta_disks
; /* change in number of raid_disks */
59 __u32 new_layout
; /* new layout */
60 __u32 new_chunk
; /* new chunk size (bytes) */
61 __u8 pad1
[128-124]; /* set to 0 when written */
63 /* constant this-device information - 64 bytes */
64 __u64 data_offset
; /* sector start of data, often 0 */
65 __u64 data_size
; /* sectors in this device that can be used for data */
66 __u64 super_offset
; /* sector start of this superblock */
67 __u64 recovery_offset
;/* sectors before this offset (from data_offset) have been recovered */
68 __u32 dev_number
; /* permanent identifier of this device - not role in raid */
69 __u32 cnt_corrected_read
; /* number of read errors that were corrected by re-writing */
70 __u8 device_uuid
[16]; /* user-space setable, ignored by kernel */
71 __u8 devflags
; /* per-device flags. Only one defined...*/
72 #define WriteMostly1 1 /* mask for writemostly flag in above */
73 __u8 pad2
[64-57]; /* set to 0 when writing */
75 /* array state information - 64 bytes */
76 __u64 utime
; /* 40 bits second, 24 btes microseconds */
77 __u64 events
; /* incremented when superblock updated */
78 __u64 resync_offset
; /* data before this offset (from data_offset) known to be in sync */
79 __u32 sb_csum
; /* checksum upto devs[max_dev] */
80 __u32 max_dev
; /* size of devs[] array to consider */
81 __u8 pad3
[64-32]; /* set to 0 when writing */
83 /* device state information. Indexed by dev_number.
85 * Note there are no per-device state flags. State information is rolled
86 * into the 'roles' value. If a device is spare or faulty, then it doesn't
87 * have a meaningful role.
89 __u16 dev_roles
[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
92 struct misc_dev_info
{
96 /* feature_map bits */
97 #define MD_FEATURE_BITMAP_OFFSET 1
98 #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
101 #define MD_FEATURE_RESHAPE_ACTIVE 4
103 #define MD_FEATURE_ALL (1|2|4)
106 #define offsetof(t,f) ((size_t)&(((t*)0)->f))
108 static unsigned int calc_sb_1_csum(struct mdp_superblock_1
* sb
)
110 unsigned int disk_csum
, csum
;
111 unsigned long long newcsum
;
112 int size
= sizeof(*sb
) + __le32_to_cpu(sb
->max_dev
)*2;
113 unsigned int *isuper
= (unsigned int*)sb
;
116 /* make sure I can count... */
117 if (offsetof(struct mdp_superblock_1
,data_offset
) != 128 ||
118 offsetof(struct mdp_superblock_1
, utime
) != 192 ||
119 sizeof(struct mdp_superblock_1
) != 256) {
120 fprintf(stderr
, "WARNING - superblock isn't sized correctly\n");
123 disk_csum
= sb
->sb_csum
;
126 for (i
=0; size
>=4; size
-= 4 ) {
127 newcsum
+= __le32_to_cpu(*isuper
);
132 newcsum
+= __le16_to_cpu(*(unsigned short*) isuper
);
134 csum
= (newcsum
& 0xffffffff) + (newcsum
>> 32);
135 sb
->sb_csum
= disk_csum
;
136 return __cpu_to_le32(csum
);
139 static char abuf
[4096+4096];
140 static int aread(int fd
, void *buf
, int len
)
143 * On devices with a 4K sector size, we need to read
144 * the full sector and copy relevant bits into
150 if (ioctl(fd
, BLKSSZGET
, &bsize
) != 0 ||
152 return read(fd
, buf
, len
);
155 b
= (char*)(((long)(abuf
+4096))&~4095UL);
157 n
= read(fd
, b
, bsize
);
160 lseek(fd
, len
- n
, 1);
167 static int awrite(int fd
, void *buf
, int len
)
170 * On devices with a 4K sector size, we need to write
171 * the full sector. We pre-read if the sector is larger
173 * The address must be sector-aligned.
178 if (ioctl(fd
, BLKSSZGET
, &bsize
) != 0 ||
180 return write(fd
, buf
, len
);
183 b
= (char*)(((long)(abuf
+4096))&~4095UL);
185 n
= read(fd
, b
, bsize
);
190 n
= write(fd
, b
, bsize
);
193 lseek(fd
, len
- n
, 1);
198 static void examine_super1(struct supertype
*st
, char *homehost
)
200 struct mdp_superblock_1
*sb
= st
->sb
;
206 int l
= homehost
? strlen(homehost
) : 0;
208 unsigned long long sb_offset
;
210 printf(" Magic : %08x\n", __le32_to_cpu(sb
->magic
));
211 printf(" Version : 1");
212 sb_offset
= __le64_to_cpu(sb
->super_offset
);
215 else if (sb_offset
<= 8)
219 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb
->feature_map
));
220 printf(" Array UUID : ");
221 for (i
=0; i
<16; i
++) {
222 if ((i
&3)==0 && i
!= 0) printf(":");
223 printf("%02x", sb
->set_uuid
[i
]);
226 printf(" Name : %.32s", sb
->set_name
);
227 if (l
> 0 && l
< 32 &&
228 sb
->set_name
[l
] == ':' &&
229 strncmp(sb
->set_name
, homehost
, l
) == 0)
230 printf(" (local to host %s)", homehost
);
232 atime
= __le64_to_cpu(sb
->ctime
) & 0xFFFFFFFFFFULL
;
233 printf(" Creation Time : %.24s\n", ctime(&atime
));
234 c
=map_num(pers
, __le32_to_cpu(sb
->level
));
235 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
236 printf(" Raid Devices : %d\n", __le32_to_cpu(sb
->raid_disks
));
238 printf(" Avail Dev Size : %llu%s\n",
239 (unsigned long long)__le64_to_cpu(sb
->data_size
),
240 human_size(__le64_to_cpu(sb
->data_size
)<<9));
241 if (__le32_to_cpu(sb
->level
) >= 0) {
243 switch(__le32_to_cpu(sb
->level
)) {
244 case 1: ddsks
=1;break;
246 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
247 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
249 layout
= __le32_to_cpu(sb
->layout
);
250 ddsks
= __le32_to_cpu(sb
->raid_disks
)
251 / (layout
&255) / ((layout
>>8)&255);
254 printf(" Array Size : %llu%s\n",
255 ddsks
*(unsigned long long)__le64_to_cpu(sb
->size
),
256 human_size(ddsks
*__le64_to_cpu(sb
->size
)<<9));
257 if (sb
->size
!= sb
->data_size
)
258 printf(" Used Dev Size : %llu%s\n",
259 (unsigned long long)__le64_to_cpu(sb
->size
),
260 human_size(__le64_to_cpu(sb
->size
)<<9));
263 printf(" Data Offset : %llu sectors\n",
264 (unsigned long long)__le64_to_cpu(sb
->data_offset
));
265 printf(" Super Offset : %llu sectors\n",
266 (unsigned long long)__le64_to_cpu(sb
->super_offset
));
267 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_RECOVERY_OFFSET
)
268 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb
->recovery_offset
));
269 printf(" State : %s\n", (__le64_to_cpu(sb
->resync_offset
)+1)? "active":"clean");
270 printf(" Device UUID : ");
271 for (i
=0; i
<16; i
++) {
272 if ((i
&3)==0 && i
!= 0) printf(":");
273 printf("%02x", sb
->device_uuid
[i
]);
277 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
278 printf("Internal Bitmap : %ld sectors from superblock\n",
279 (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
));
281 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
282 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb
->reshape_position
)/2,
283 human_size(__le64_to_cpu(sb
->reshape_position
)<<9));
284 if (__le32_to_cpu(sb
->delta_disks
)) {
285 printf(" Delta Devices : %d", __le32_to_cpu(sb
->delta_disks
));
286 if (__le32_to_cpu(sb
->delta_disks
))
287 printf(" (%d->%d)\n",
288 __le32_to_cpu(sb
->raid_disks
)-__le32_to_cpu(sb
->delta_disks
),
289 __le32_to_cpu(sb
->raid_disks
));
291 printf(" (%d->%d)\n", __le32_to_cpu(sb
->raid_disks
),
292 __le32_to_cpu(sb
->raid_disks
)+__le32_to_cpu(sb
->delta_disks
));
294 if (__le32_to_cpu(sb
->new_level
) != __le32_to_cpu(sb
->level
)) {
295 c
= map_num(pers
, __le32_to_cpu(sb
->new_level
));
296 printf(" New Level : %s\n", c
?c
:"-unknown-");
298 if (__le32_to_cpu(sb
->new_layout
) != __le32_to_cpu(sb
->layout
)) {
299 if (__le32_to_cpu(sb
->level
) == 5) {
300 c
= map_num(r5layout
, __le32_to_cpu(sb
->new_layout
));
301 printf(" New Layout : %s\n", c
?c
:"-unknown-");
303 if (__le32_to_cpu(sb
->level
) == 6) {
304 c
= map_num(r6layout
, __le32_to_cpu(sb
->new_layout
));
305 printf(" New Layout : %s\n", c
?c
:"-unknown-");
307 if (__le32_to_cpu(sb
->level
) == 10) {
308 printf(" New Layout :");
309 print_r10_layout(__le32_to_cpu(sb
->new_layout
));
313 if (__le32_to_cpu(sb
->new_chunk
) != __le32_to_cpu(sb
->chunksize
))
314 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb
->new_chunk
)/2);
319 if (sb
->devflags
& WriteMostly1
)
320 printf(" write-mostly");
324 atime
= __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
;
325 printf(" Update Time : %.24s\n", ctime(&atime
));
327 if (calc_sb_1_csum(sb
) == sb
->sb_csum
)
328 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb
->sb_csum
));
330 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb
->sb_csum
),
331 __le32_to_cpu(calc_sb_1_csum(sb
)));
332 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb
->events
));
334 if (__le32_to_cpu(sb
->level
) == 5) {
335 c
= map_num(r5layout
, __le32_to_cpu(sb
->layout
));
336 printf(" Layout : %s\n", c
?c
:"-unknown-");
338 if (__le32_to_cpu(sb
->level
) == 6) {
339 c
= map_num(r6layout
, __le32_to_cpu(sb
->layout
));
340 printf(" Layout : %s\n", c
?c
:"-unknown-");
342 if (__le32_to_cpu(sb
->level
) == 10) {
343 int lo
= __le32_to_cpu(sb
->layout
);
345 print_r10_layout(lo
);
348 switch(__le32_to_cpu(sb
->level
)) {
354 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
357 printf(" Rounding : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
363 /* This turns out to just be confusing */
364 printf(" Array Slot : %d (", __le32_to_cpu(sb
->dev_number
));
365 for (i
= __le32_to_cpu(sb
->max_dev
); i
> 0 ; i
--)
366 if (__le16_to_cpu(sb
->dev_roles
[i
-1]) != 0xffff)
368 for (d
=0; d
< i
; d
++) {
369 int role
= __le16_to_cpu(sb
->dev_roles
[d
]);
371 if (role
== 0xffff) printf("empty");
372 else if(role
== 0xfffe) printf("failed");
373 else printf("%d", role
);
377 printf(" Device Role : ");
378 d
= __le32_to_cpu(sb
->dev_number
);
379 if (d
< sb
->raid_disks
)
380 role
= __le16_to_cpu(sb
->dev_roles
[d
]);
386 printf("Active device %d\n", role
);
388 printf(" Array State : ");
389 for (d
=0; d
<__le32_to_cpu(sb
->raid_disks
); d
++) {
393 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
394 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
396 if (i
== __le32_to_cpu(sb
->dev_number
))
401 if (cnt
> 1) printf("?");
402 else if (cnt
== 1) printf("A");
406 /* This is confusing too */
408 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
409 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
413 if (faulty
) printf(" %d failed", faulty
);
415 printf(" ('A' == active, '.' == missing)");
420 static void brief_examine_super1(struct supertype
*st
, int verbose
)
422 struct mdp_superblock_1
*sb
= st
->sb
;
424 unsigned long long sb_offset
;
426 char *c
=map_num(pers
, __le32_to_cpu(sb
->level
));
428 nm
= strchr(sb
->set_name
, ':');
431 else if (sb
->set_name
[0])
436 printf("ARRAY%s%s", nm
? " /dev/md/":"", nm
);
438 printf(" level=%s", c
);
439 sb_offset
= __le64_to_cpu(sb
->super_offset
);
441 printf(" metadata=1.1 ");
442 else if (sb_offset
<= 8)
443 printf(" metadata=1.2 ");
445 printf(" metadata=1.0 ");
447 printf("num-devices=%d ", __le32_to_cpu(sb
->raid_disks
));
449 for (i
=0; i
<16; i
++) {
450 if ((i
&3)==0 && i
!= 0) printf(":");
451 printf("%02x", sb
->set_uuid
[i
]);
454 printf(" name=%.32s", sb
->set_name
);
458 static void export_examine_super1(struct supertype
*st
)
460 struct mdp_superblock_1
*sb
= st
->sb
;
464 printf("MD_LEVEL=%s\n", map_num(pers
, __le32_to_cpu(sb
->level
)));
465 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb
->raid_disks
));
467 if (sb
->set_name
[i
] == '\n' ||
468 sb
->set_name
[i
] == '\0') {
473 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
475 for (i
=0; i
<16; i
++) {
476 if ((i
&3)==0 && i
!= 0) printf(":");
477 printf("%02x", sb
->set_uuid
[i
]);
480 printf("MD_UPDATE_TIME=%llu\n",
481 __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
);
482 printf("MD_DEV_UUID=");
483 for (i
=0; i
<16; i
++) {
484 if ((i
&3)==0 && i
!= 0) printf(":");
485 printf("%02x", sb
->device_uuid
[i
]);
488 printf("MD_EVENTS=%llu\n",
489 (unsigned long long)__le64_to_cpu(sb
->events
));
492 static void detail_super1(struct supertype
*st
, char *homehost
)
494 struct mdp_superblock_1
*sb
= st
->sb
;
496 int l
= homehost
? strlen(homehost
) : 0;
498 printf(" Name : %.32s", sb
->set_name
);
499 if (l
> 0 && l
< 32 &&
500 sb
->set_name
[l
] == ':' &&
501 strncmp(sb
->set_name
, homehost
, l
) == 0)
502 printf(" (local to host %s)", homehost
);
503 printf("\n UUID : ");
504 for (i
=0; i
<16; i
++) {
505 if ((i
&3)==0 && i
!= 0) printf(":");
506 printf("%02x", sb
->set_uuid
[i
]);
508 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb
->events
));
511 static void brief_detail_super1(struct supertype
*st
)
513 struct mdp_superblock_1
*sb
= st
->sb
;
517 printf(" name=%.32s", sb
->set_name
);
519 for (i
=0; i
<16; i
++) {
520 if ((i
&3)==0 && i
!= 0) printf(":");
521 printf("%02x", sb
->set_uuid
[i
]);
525 static void export_detail_super1(struct supertype
*st
)
527 struct mdp_superblock_1
*sb
= st
->sb
;
532 if (sb
->set_name
[i
] == '\n' ||
533 sb
->set_name
[i
] == '\0') {
538 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
543 static int match_home1(struct supertype
*st
, char *homehost
)
545 struct mdp_superblock_1
*sb
= st
->sb
;
546 int l
= homehost
? strlen(homehost
) : 0;
548 return (l
> 0 && l
< 32 &&
549 sb
->set_name
[l
] == ':' &&
550 strncmp(sb
->set_name
, homehost
, l
) == 0);
553 static void uuid_from_super1(struct supertype
*st
, int uuid
[4])
555 struct mdp_superblock_1
*super
= st
->sb
;
556 char *cuuid
= (char*)uuid
;
559 cuuid
[i
] = super
->set_uuid
[i
];
562 static void getinfo_super1(struct supertype
*st
, struct mdinfo
*info
)
564 struct mdp_superblock_1
*sb
= st
->sb
;
569 info
->array
.major_version
= 1;
570 info
->array
.minor_version
= st
->minor_version
;
571 info
->array
.patch_version
= 0;
572 info
->array
.raid_disks
= __le32_to_cpu(sb
->raid_disks
);
573 info
->array
.level
= __le32_to_cpu(sb
->level
);
574 info
->array
.layout
= __le32_to_cpu(sb
->layout
);
575 info
->array
.md_minor
= -1;
576 info
->array
.ctime
= __le64_to_cpu(sb
->ctime
);
577 info
->array
.utime
= __le64_to_cpu(sb
->utime
);
578 info
->array
.chunk_size
= __le32_to_cpu(sb
->chunksize
)*512;
580 (__le64_to_cpu(sb
->resync_offset
) >= __le64_to_cpu(sb
->size
))
583 info
->data_offset
= __le64_to_cpu(sb
->data_offset
);
584 info
->component_size
= __le64_to_cpu(sb
->size
);
586 info
->disk
.major
= 0;
587 info
->disk
.minor
= 0;
588 info
->disk
.number
= __le32_to_cpu(sb
->dev_number
);
589 if (__le32_to_cpu(sb
->dev_number
) >= __le32_to_cpu(sb
->max_dev
) ||
590 __le32_to_cpu(sb
->max_dev
) > 512)
593 role
= __le16_to_cpu(sb
->dev_roles
[__le32_to_cpu(sb
->dev_number
)]);
595 info
->disk
.raid_disk
= -1;
598 info
->disk
.state
= 2; /* spare: ACTIVE, not sync, not faulty */
601 info
->disk
.state
= 1; /* faulty */
604 info
->disk
.state
= 6; /* active and in sync */
605 info
->disk
.raid_disk
= role
;
607 info
->events
= __le64_to_cpu(sb
->events
);
608 sprintf(info
->text_version
, "1.%d", st
->minor_version
);
609 info
->safe_mode_delay
= 200;
611 memcpy(info
->uuid
, sb
->set_uuid
, 16);
613 strncpy(info
->name
, sb
->set_name
, 32);
616 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
617 info
->reshape_active
= 1;
618 info
->reshape_progress
= __le64_to_cpu(sb
->reshape_position
);
619 info
->new_level
= __le32_to_cpu(sb
->new_level
);
620 info
->delta_disks
= __le32_to_cpu(sb
->delta_disks
);
621 info
->new_layout
= __le32_to_cpu(sb
->new_layout
);
622 info
->new_chunk
= __le32_to_cpu(sb
->new_chunk
)<<9;
624 info
->reshape_active
= 0;
626 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
627 role
= __le16_to_cpu(sb
->dev_roles
[i
]);
628 if (/*role == 0xFFFF || */role
< info
->array
.raid_disks
)
632 info
->array
.working_disks
= working
;
635 static int update_super1(struct supertype
*st
, struct mdinfo
*info
,
637 char *devname
, int verbose
,
638 int uuid_set
, char *homehost
)
640 /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
641 * For others, the return value is ignored.
644 struct mdp_superblock_1
*sb
= st
->sb
;
646 if (strcmp(update
, "force-one")==0) {
647 /* Not enough devices for a working array,
648 * so bring this one up-to-date
650 if (sb
->events
!= __cpu_to_le64(info
->events
))
652 sb
->events
= __cpu_to_le64(info
->events
);
654 if (strcmp(update
, "force-array")==0) {
655 /* Degraded array and 'force' requests to
656 * maybe need to mark it 'clean'.
658 switch(__le32_to_cpu(sb
->level
)) {
659 case 5: case 4: case 6:
660 /* need to force clean */
661 if (sb
->resync_offset
!= ~0ULL)
663 sb
->resync_offset
= ~0ULL;
666 if (strcmp(update
, "assemble")==0) {
667 int d
= info
->disk
.number
;
669 if (info
->disk
.state
== 6)
670 want
= __cpu_to_le32(info
->disk
.raid_disk
);
673 if (sb
->dev_roles
[d
] != want
) {
674 sb
->dev_roles
[d
] = want
;
678 if (strcmp(update
, "linear-grow-new") == 0) {
681 int max
= __le32_to_cpu(sb
->max_dev
);
683 for (i
=0 ; i
< max
; i
++)
684 if (__le16_to_cpu(sb
->dev_roles
[i
]) >= 0xfffe)
686 sb
->dev_number
= __cpu_to_le32(i
);
687 info
->disk
.number
= i
;
688 if (max
>= __le32_to_cpu(sb
->max_dev
))
689 sb
->max_dev
= __cpu_to_le32(max
+1);
691 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
692 read(rfd
, sb
->device_uuid
, 16) != 16) {
693 __u32 r
[4] = {random(), random(), random(), random()};
694 memcpy(sb
->device_uuid
, r
, 16);
700 __cpu_to_le16(info
->disk
.raid_disk
);
702 fd
= open(devname
, O_RDONLY
);
704 unsigned long long ds
;
705 get_dev_size(fd
, devname
, &ds
);
708 if (__le64_to_cpu(sb
->super_offset
) <
709 __le64_to_cpu(sb
->data_offset
)) {
710 sb
->data_size
= __cpu_to_le64(
711 ds
- __le64_to_cpu(sb
->data_offset
));
714 ds
&= ~(unsigned long long)(4*2-1);
715 sb
->super_offset
= __cpu_to_le64(ds
);
716 sb
->data_size
= __cpu_to_le64(
717 ds
- __le64_to_cpu(sb
->data_offset
));
721 if (strcmp(update
, "linear-grow-update") == 0) {
722 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
723 sb
->dev_roles
[info
->disk
.number
] =
724 __cpu_to_le16(info
->disk
.raid_disk
);
726 if (strcmp(update
, "resync") == 0) {
727 /* make sure resync happens */
728 sb
->resync_offset
= 0ULL;
730 if (strcmp(update
, "uuid") == 0) {
731 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
733 if (__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
734 struct bitmap_super_s
*bm
;
735 bm
= (struct bitmap_super_s
*)(st
->sb
+1024);
736 memcpy(bm
->uuid
, sb
->set_uuid
, 16);
739 if (strcmp(update
, "homehost") == 0 &&
743 c
= strchr(sb
->set_name
, ':');
745 strncpy(info
->name
, c
+1, 31 - (c
-sb
->set_name
));
747 strncpy(info
->name
, sb
->set_name
, 32);
750 if (strcmp(update
, "name") == 0) {
751 if (info
->name
[0] == 0)
752 sprintf(info
->name
, "%d", info
->array
.md_minor
);
753 memset(sb
->set_name
, 0, sizeof(sb
->set_name
));
755 strchr(info
->name
, ':') == NULL
&&
756 strlen(homehost
)+1+strlen(info
->name
) < 32) {
757 strcpy(sb
->set_name
, homehost
);
758 strcat(sb
->set_name
, ":");
759 strcat(sb
->set_name
, info
->name
);
761 strcpy(sb
->set_name
, info
->name
);
763 if (strcmp(update
, "devicesize") == 0 &&
764 __le64_to_cpu(sb
->super_offset
) <
765 __le64_to_cpu(sb
->data_offset
)) {
766 /* set data_size to device size less data_offset */
767 struct misc_dev_info
*misc
= (struct misc_dev_info
*)
768 (st
->sb
+ 1024 + 512);
769 printf("Size was %llu\n", (unsigned long long)
770 __le64_to_cpu(sb
->data_size
));
771 sb
->data_size
= __cpu_to_le64(
772 misc
->device_size
- __le64_to_cpu(sb
->data_offset
));
773 printf("Size is %llu\n", (unsigned long long)
774 __le64_to_cpu(sb
->data_size
));
776 if (strcmp(update
, "_reshape_progress")==0)
777 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
779 sb
->sb_csum
= calc_sb_1_csum(sb
);
783 static int init_super1(struct supertype
*st
, mdu_array_info_t
*info
,
784 unsigned long long size
, char *name
, char *homehost
, int *uuid
)
786 struct mdp_superblock_1
*sb
;
791 if (posix_memalign((void**)&sb
, 512, (1024 + 512 +
792 sizeof(struct misc_dev_info
))) != 0) {
794 ": %s could not allocate superblock\n", __func__
);
801 /* zeroing superblock */
805 spares
= info
->working_disks
- info
->active_disks
;
806 if (info
->raid_disks
+ spares
> 384) {
807 fprintf(stderr
, Name
": too many devices requested: %d+%d > %d\n",
808 info
->raid_disks
, spares
, 384);
812 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
813 sb
->major_version
= __cpu_to_le32(1);
818 copy_uuid(sb
->set_uuid
, uuid
, super1
.swapuuid
);
820 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
821 read(rfd
, sb
->set_uuid
, 16) != 16) {
822 __u32 r
[4] = {random(), random(), random(), random()};
823 memcpy(sb
->set_uuid
, r
, 16);
825 if (rfd
>= 0) close(rfd
);
828 if (name
== NULL
|| *name
== 0) {
829 sprintf(defname
, "%d", info
->md_minor
);
832 memset(sb
->set_name
, 0, 32);
834 strchr(name
, ':')== NULL
&&
835 strlen(homehost
)+1+strlen(name
) < 32) {
836 strcpy(sb
->set_name
, homehost
);
837 strcat(sb
->set_name
, ":");
838 strcat(sb
->set_name
, name
);
840 strcpy(sb
->set_name
, name
);
842 sb
->ctime
= __cpu_to_le64((unsigned long long)time(0));
843 sb
->level
= __cpu_to_le32(info
->level
);
844 sb
->layout
= __cpu_to_le32(info
->layout
);
845 sb
->size
= __cpu_to_le64(size
*2ULL);
846 sb
->chunksize
= __cpu_to_le32(info
->chunk_size
>>9);
847 sb
->raid_disks
= __cpu_to_le32(info
->raid_disks
);
849 sb
->data_offset
= __cpu_to_le64(0);
850 sb
->data_size
= __cpu_to_le64(0);
851 sb
->super_offset
= __cpu_to_le64(0);
852 sb
->recovery_offset
= __cpu_to_le64(0);
854 sb
->utime
= sb
->ctime
;
855 sb
->events
= __cpu_to_le64(1);
856 if (info
->state
& (1<<MD_SB_CLEAN
))
857 sb
->resync_offset
= ~0ULL;
859 sb
->resync_offset
= 0;
860 sb
->max_dev
= __cpu_to_le32((1024- sizeof(struct mdp_superblock_1
))/
861 sizeof(sb
->dev_roles
[0]));
862 memset(sb
->pad3
, 0, sizeof(sb
->pad3
));
864 memset(sb
->dev_roles
, 0xff, 1024 - sizeof(struct mdp_superblock_1
));
872 mdu_disk_info_t disk
;
873 struct devinfo
*next
;
876 /* Add a device to the superblock being created */
877 static int add_to_super1(struct supertype
*st
, mdu_disk_info_t
*dk
,
878 int fd
, char *devname
)
880 struct mdp_superblock_1
*sb
= st
->sb
;
881 __u16
*rp
= sb
->dev_roles
+ dk
->number
;
882 struct devinfo
*di
, **dip
;
884 if ((dk
->state
& 6) == 6) /* active, sync */
885 *rp
= __cpu_to_le16(dk
->raid_disk
);
886 else if ((dk
->state
& ~2) == 0) /* active or idle -> spare */
891 if (dk
->number
>= __le32_to_cpu(sb
->max_dev
) &&
892 __le32_to_cpu(sb
->max_dev
) < 384)
893 sb
->max_dev
= __cpu_to_le32(dk
->number
+1);
895 sb
->dev_number
= __cpu_to_le32(dk
->number
);
896 sb
->sb_csum
= calc_sb_1_csum(sb
);
898 dip
= (struct devinfo
**)&st
->info
;
901 di
= malloc(sizeof(struct devinfo
));
903 di
->devname
= devname
;
912 static void locate_bitmap1(struct supertype
*st
, int fd
);
914 static int store_super1(struct supertype
*st
, int fd
)
916 struct mdp_superblock_1
*sb
= st
->sb
;
917 unsigned long long sb_offset
;
919 unsigned long long dsize
;
921 if (!get_dev_size(fd
, NULL
, &dsize
))
930 * Calculate the position of the superblock.
931 * It is always aligned to a 4K boundary and
932 * depending on minor_version, it can be:
933 * 0: At least 8K, but less than 12K, from end of device
934 * 1: At start of device
935 * 2: 4K from start of device.
937 switch(st
->minor_version
) {
941 sb_offset
&= ~(4*2-1);
955 if (sb_offset
!= __le64_to_cpu(sb
->super_offset
) &&
956 0 != __le64_to_cpu(sb
->super_offset
)
958 fprintf(stderr
, Name
": internal error - sb_offset is wrong\n");
962 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL)
965 sbsize
= sizeof(*sb
) + 2 * __le32_to_cpu(sb
->max_dev
);
966 sbsize
= (sbsize
+511)&(~511UL);
968 if (awrite(fd
, sb
, sbsize
) != sbsize
)
971 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
972 struct bitmap_super_s
*bm
= (struct bitmap_super_s
*)
974 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
) {
975 locate_bitmap1(st
, fd
);
976 if (awrite(fd
, bm
, sizeof(*bm
)) !=
985 static int load_super1(struct supertype
*st
, int fd
, char *devname
);
987 static unsigned long choose_bm_space(unsigned long devsize
)
989 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
990 * if bigger than 200Gig, save 128k
992 if (devsize
< 64*2) return 0;
993 if (devsize
- 64*2 >= 200*1024*1024*2)
995 if (devsize
- 4*2 > 8*1024*1024*2)
1001 static int write_init_super1(struct supertype
*st
)
1003 struct mdp_superblock_1
*sb
= st
->sb
;
1004 struct supertype refst
;
1009 unsigned long long dsize
, array_size
;
1010 long long sb_offset
;
1012 for (di
= st
->info
; di
&& ! rv
; di
= di
->next
) {
1013 if (di
->disk
.state
== 1)
1018 Kill(di
->devname
, 0, 1, 1);
1019 Kill(di
->devname
, 0, 1, 1);
1021 sb
->dev_number
= __cpu_to_le32(di
->disk
.number
);
1022 if (di
->disk
.state
& (1<<MD_DISK_WRITEMOSTLY
))
1023 sb
->devflags
|= __cpu_to_le32(WriteMostly1
);
1025 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1026 read(rfd
, sb
->device_uuid
, 16) != 16) {
1027 __u32 r
[4] = {random(), random(), random(), random()};
1028 memcpy(sb
->device_uuid
, r
, 16);
1037 if (load_super1(&refst
, di
->fd
, NULL
)==0) {
1038 struct mdp_superblock_1
*refsb
= refst
.sb
;
1040 memcpy(sb
->device_uuid
, refsb
->device_uuid
, 16);
1041 if (memcmp(sb
->set_uuid
, refsb
->set_uuid
, 16)==0) {
1042 /* same array, so preserve events and
1044 sb
->events
= refsb
->events
;
1045 /* bugs in 2.6.17 and earlier mean the
1046 * dev_number chosen in Manage must be preserved
1048 if (get_linux_version() >= 2006018)
1049 sb
->dev_number
= refsb
->dev_number
;
1054 if (!get_dev_size(di
->fd
, NULL
, &dsize
))
1065 * Calculate the position of the superblock.
1066 * It is always aligned to a 4K boundary and
1067 * depending on minor_version, it can be:
1068 * 0: At least 8K, but less than 12K, from end of device
1069 * 1: At start of device
1070 * 2: 4K from start of device.
1071 * Depending on the array size, we might leave extra space
1074 array_size
= __le64_to_cpu(sb
->size
);
1075 /* work out how much space we left for a bitmap */
1076 bm_space
= choose_bm_space(array_size
);
1078 switch(st
->minor_version
) {
1082 sb_offset
&= ~(4*2-1);
1083 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1084 sb
->data_offset
= __cpu_to_le64(0);
1085 if (sb_offset
- bm_space
< array_size
)
1086 bm_space
= sb_offset
- array_size
;
1087 sb
->data_size
= __cpu_to_le64(sb_offset
- bm_space
);
1090 sb
->super_offset
= __cpu_to_le64(0);
1091 if (4*2 + bm_space
+ __le64_to_cpu(sb
->size
) > dsize
)
1092 bm_space
= dsize
- __le64_to_cpu(sb
->size
) -4*2;
1093 sb
->data_offset
= __cpu_to_le64(bm_space
+ 4*2);
1094 sb
->data_size
= __cpu_to_le64(dsize
- bm_space
- 4*2);
1098 sb
->super_offset
= __cpu_to_le64(4*2);
1099 if (4*2 + 4*2 + bm_space
+ __le64_to_cpu(sb
->size
)
1101 bm_space
= dsize
- __le64_to_cpu(sb
->size
)
1103 sb
->data_offset
= __cpu_to_le64(4*2 + 4*2 + bm_space
);
1104 sb
->data_size
= __cpu_to_le64(dsize
- 4*2 - 4*2
1112 sb
->sb_csum
= calc_sb_1_csum(sb
);
1113 rv
= store_super1(st
, di
->fd
);
1116 Name
": failed to write superblock to %s\n",
1119 if (rv
== 0 && (__le32_to_cpu(sb
->feature_map
) & 1))
1120 rv
= st
->ss
->write_bitmap(st
, di
->fd
);
1128 static int compare_super1(struct supertype
*st
, struct supertype
*tst
)
1132 * 0 same, or first was empty, and second was copied
1133 * 1 second had wrong number
1135 * 3 wrong other info
1137 struct mdp_superblock_1
*first
= st
->sb
;
1138 struct mdp_superblock_1
*second
= tst
->sb
;
1140 if (second
->magic
!= __cpu_to_le32(MD_SB_MAGIC
))
1142 if (second
->major_version
!= __cpu_to_le32(1))
1146 if (posix_memalign((void**)&first
, 512,
1148 sizeof(struct misc_dev_info
)) != 0) {
1149 fprintf(stderr
, Name
1150 ": %s could not allocate superblock\n", __func__
);
1153 memcpy(first
, second
, 1024 + 512 +
1154 sizeof(struct misc_dev_info
));
1158 if (memcmp(first
->set_uuid
, second
->set_uuid
, 16)!= 0)
1161 if (first
->ctime
!= second
->ctime
||
1162 first
->level
!= second
->level
||
1163 first
->layout
!= second
->layout
||
1164 first
->size
!= second
->size
||
1165 first
->chunksize
!= second
->chunksize
||
1166 first
->raid_disks
!= second
->raid_disks
)
1171 static void free_super1(struct supertype
*st
);
1173 static int load_super1(struct supertype
*st
, int fd
, char *devname
)
1175 unsigned long long dsize
;
1176 unsigned long long sb_offset
;
1177 struct mdp_superblock_1
*super
;
1179 struct bitmap_super_s
*bsb
;
1180 struct misc_dev_info
*misc
;
1184 if (st
->subarray
[0])
1187 if (st
->ss
== NULL
|| st
->minor_version
== -1) {
1189 struct supertype tst
;
1190 __u64 bestctime
= 0;
1191 /* guess... choose latest ctime */
1192 memset(&tst
, 0, sizeof(tst
));
1194 for (tst
.minor_version
= 0; tst
.minor_version
<= 2 ; tst
.minor_version
++) {
1195 switch(load_super1(&tst
, fd
, devname
)) {
1196 case 0: super
= tst
.sb
;
1197 if (bestvers
== -1 ||
1198 bestctime
< __le64_to_cpu(super
->ctime
)) {
1199 bestvers
= tst
.minor_version
;
1200 bestctime
= __le64_to_cpu(super
->ctime
);
1205 case 1: return 1; /*bad device */
1206 case 2: break; /* bad, try next */
1209 if (bestvers
!= -1) {
1211 tst
.minor_version
= bestvers
;
1214 rv
= load_super1(&tst
, fd
, devname
);
1221 if (!get_dev_size(fd
, devname
, &dsize
))
1227 fprintf(stderr
, Name
": %s is too small for md: size is %llu sectors.\n",
1233 * Calculate the position of the superblock.
1234 * It is always aligned to a 4K boundary and
1235 * depending on minor_version, it can be:
1236 * 0: At least 8K, but less than 12K, from end of device
1237 * 1: At start of device
1238 * 2: 4K from start of device.
1240 switch(st
->minor_version
) {
1244 sb_offset
&= ~(4*2-1);
1256 ioctl(fd
, BLKFLSBUF
, 0); /* make sure we read current data */
1259 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL) {
1261 fprintf(stderr
, Name
": Cannot seek to superblock on %s: %s\n",
1262 devname
, strerror(errno
));
1266 if (posix_memalign((void**)&super
, 512,
1268 sizeof(struct misc_dev_info
)) != 0) {
1269 fprintf(stderr
, Name
": %s could not allocate superblock\n",
1274 if (aread(fd
, super
, 1024) != 1024) {
1276 fprintf(stderr
, Name
": Cannot read superblock on %s\n",
1282 if (__le32_to_cpu(super
->magic
) != MD_SB_MAGIC
) {
1284 fprintf(stderr
, Name
": No super block found on %s (Expected magic %08x, got %08x)\n",
1285 devname
, MD_SB_MAGIC
, __le32_to_cpu(super
->magic
));
1290 if (__le32_to_cpu(super
->major_version
) != 1) {
1292 fprintf(stderr
, Name
": Cannot interpret superblock on %s - version is %d\n",
1293 devname
, __le32_to_cpu(super
->major_version
));
1297 if (__le64_to_cpu(super
->super_offset
) != sb_offset
) {
1299 fprintf(stderr
, Name
": No superblock found on %s (super_offset is wrong)\n",
1306 bsb
= (struct bitmap_super_s
*)(((char*)super
)+1024);
1308 misc
= (struct misc_dev_info
*) (((char*)super
)+1024+512);
1309 misc
->device_size
= dsize
;
1311 /* Now check on the bitmap superblock */
1312 if ((__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) == 0)
1314 /* Read the bitmap superblock and make sure it looks
1315 * valid. If it doesn't clear the bit. An --assemble --force
1316 * should get that written out.
1318 locate_bitmap1(st
, fd
);
1319 if (aread(fd
, ((char*)super
)+1024, 512)
1323 uuid_from_super1(st
, uuid
);
1324 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
1325 memcmp(bsb
->uuid
, uuid
, 16) != 0)
1330 super
->feature_map
= __cpu_to_le32(__le32_to_cpu(super
->feature_map
) & ~1);
1335 static struct supertype
*match_metadata_desc1(char *arg
)
1337 struct supertype
*st
= malloc(sizeof(*st
));
1340 memset(st
, 0, sizeof(*st
));
1344 /* leading zeros can be safely ignored. --detail generates them. */
1347 if (strcmp(arg
, "1.0") == 0 ||
1348 strcmp(arg
, "1.00") == 0) {
1349 st
->minor_version
= 0;
1352 if (strcmp(arg
, "1.1") == 0 ||
1353 strcmp(arg
, "1.01") == 0) {
1354 st
->minor_version
= 1;
1357 if (strcmp(arg
, "1.2") == 0 ||
1358 strcmp(arg
, "1.02") == 0) {
1359 st
->minor_version
= 2;
1362 if (strcmp(arg
, "1") == 0 ||
1363 strcmp(arg
, "default") == 0) {
1364 st
->minor_version
= -1;
1372 /* find available size on device with this devsize, using
1373 * superblock type st, and reserving 'reserve' sectors for
1376 static __u64
avail_size1(struct supertype
*st
, __u64 devsize
)
1378 struct mdp_superblock_1
*super
= st
->sb
;
1383 /* creating: allow suitable space for bitmap */
1384 devsize
-= choose_bm_space(devsize
);
1386 else if (__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
1387 /* hot-add. allow for actual size of bitmap */
1388 struct bitmap_super_s
*bsb
;
1389 bsb
= (struct bitmap_super_s
*)(((char*)super
)+1024);
1390 devsize
-= bitmap_sectors(bsb
);
1394 switch(st
->minor_version
) {
1395 case -1: /* no specified. Now time to set default */
1396 st
->minor_version
= 0;
1400 return ((devsize
- 8*2 ) & ~(4*2-1));
1402 /* at start, 4K for superblock and possible bitmap */
1403 return devsize
- 4*2;
1405 /* 4k from start, 4K for superblock and possible bitmap */
1406 return devsize
- (4+4)*2;
1412 add_internal_bitmap1(struct supertype
*st
,
1413 int *chunkp
, int delay
, int write_behind
,
1414 unsigned long long size
,
1415 int may_change
, int major
)
1418 * If not may_change, then this is a 'Grow', and the bitmap
1419 * must fit after the superblock.
1420 * If may_change, then this is create, and we can put the bitmap
1421 * before the superblock if we like, or may move the start.
1422 * If !may_change, the bitmap MUST live at offset of 1K, until
1423 * we get a sysfs interface.
1425 * size is in sectors, chunk is in bytes !!!
1428 unsigned long long bits
;
1429 unsigned long long max_bits
;
1430 unsigned long long min_chunk
;
1432 int chunk
= *chunkp
;
1434 struct mdp_superblock_1
*sb
= st
->sb
;
1435 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + 1024);
1437 switch(st
->minor_version
) {
1439 /* either 3K after the superblock, or some amount of space
1443 /* We are creating array, so we *know* how much room has
1447 room
= choose_bm_space(__le64_to_cpu(sb
->size
));
1449 /* make it 3K after the superblock */
1454 room
= __le64_to_cpu(sb
->super_offset
)
1455 - __le64_to_cpu(sb
->data_offset
)
1456 - __le64_to_cpu(sb
->data_size
);
1457 /* remove '1 ||' when we can set offset via sysfs */
1458 if (1 || (room
< 3*2 &&
1459 __le32_to_cpu(sb
->max_dev
) <= 384)) {
1463 offset
= 0; /* means movable offset */
1468 case 2: /* between superblock and data */
1471 room
= choose_bm_space(__le64_to_cpu(sb
->size
));
1473 room
= __le64_to_cpu(sb
->data_offset
)
1474 - __le64_to_cpu(sb
->super_offset
);
1475 if (1 || __le32_to_cpu(sb
->max_dev
) <= 384) {
1488 if (chunk
== UnSet
&& room
> 128*2)
1489 /* Limit to 128K of bitmap when chunk size not requested */
1492 max_bits
= (room
* 512 - sizeof(bitmap_super_t
)) * 8;
1494 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
1495 bits
= (size
*512)/min_chunk
+1;
1496 while (bits
> max_bits
) {
1502 else if (chunk
< min_chunk
)
1503 return 0; /* chunk size too small */
1504 if (chunk
== 0) /* rounding problem */
1508 bits
= (size
*512) / chunk
+ 1;
1509 room
= ((bits
+7)/8 + sizeof(bitmap_super_t
) +511)/512;
1513 sb
->bitmap_offset
= __cpu_to_le32(offset
);
1515 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
) | 1);
1516 memset(bms
, 0, sizeof(*bms
));
1517 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
1518 bms
->version
= __cpu_to_le32(major
);
1519 uuid_from_super1(st
, (int*)bms
->uuid
);
1520 bms
->chunksize
= __cpu_to_le32(chunk
);
1521 bms
->daemon_sleep
= __cpu_to_le32(delay
);
1522 bms
->sync_size
= __cpu_to_le64(size
);
1523 bms
->write_behind
= __cpu_to_le32(write_behind
);
1530 static void locate_bitmap1(struct supertype
*st
, int fd
)
1532 unsigned long long offset
;
1533 struct mdp_superblock_1
*sb
;
1537 if (st
->ss
->load_super(st
, fd
, NULL
))
1538 return; /* no error I hope... */
1543 offset
= __le64_to_cpu(sb
->super_offset
);
1544 offset
+= (int32_t) __le32_to_cpu(sb
->bitmap_offset
);
1547 lseek64(fd
, offset
<<9, 0);
1550 static int write_bitmap1(struct supertype
*st
, int fd
)
1552 struct mdp_superblock_1
*sb
= st
->sb
;
1553 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+1024);
1557 char *buf
= (char*)(((long)(abuf
+4096))&~4095UL);
1559 locate_bitmap1(st
, fd
);
1561 memset(buf
, 0xff, 4096);
1562 memcpy(buf
, ((char*)sb
)+1024, sizeof(bitmap_super_t
));
1564 towrite
= __le64_to_cpu(bms
->sync_size
) / (__le32_to_cpu(bms
->chunksize
)>>9);
1565 towrite
= (towrite
+7) >> 3; /* bits to bytes */
1566 towrite
+= sizeof(bitmap_super_t
);
1567 towrite
= ROUND_UP(towrite
, 512);
1568 while (towrite
> 0) {
1572 n
= write(fd
, buf
, n
);
1577 memset(buf
, 0xff, 4096);
1586 static void free_super1(struct supertype
*st
)
1594 static int validate_geometry1(struct supertype
*st
, int level
,
1595 int layout
, int raiddisks
,
1596 int chunk
, unsigned long long size
,
1597 char *subdev
, unsigned long long *freesize
,
1600 unsigned long long ldsize
;
1603 if (level
== LEVEL_CONTAINER
)
1608 fd
= open(subdev
, O_RDONLY
|O_EXCL
, 0);
1611 fprintf(stderr
, Name
": super1.x cannot open %s: %s\n",
1612 subdev
, strerror(errno
));
1616 if (!get_dev_size(fd
, subdev
, &ldsize
)) {
1622 *freesize
= avail_size1(st
, ldsize
>> 9);
1625 #endif /* MDASSEMBLE */
1627 struct superswitch super1
= {
1629 .examine_super
= examine_super1
,
1630 .brief_examine_super
= brief_examine_super1
,
1631 .export_examine_super
= export_examine_super1
,
1632 .detail_super
= detail_super1
,
1633 .brief_detail_super
= brief_detail_super1
,
1634 .export_detail_super
= export_detail_super1
,
1635 .write_init_super
= write_init_super1
,
1636 .validate_geometry
= validate_geometry1
,
1637 .add_to_super
= add_to_super1
,
1639 .match_home
= match_home1
,
1640 .uuid_from_super
= uuid_from_super1
,
1641 .getinfo_super
= getinfo_super1
,
1642 .update_super
= update_super1
,
1643 .init_super
= init_super1
,
1644 .store_super
= store_super1
,
1645 .compare_super
= compare_super1
,
1646 .load_super
= load_super1
,
1647 .match_metadata_desc
= match_metadata_desc1
,
1648 .avail_size
= avail_size1
,
1649 .add_internal_bitmap
= add_internal_bitmap1
,
1650 .locate_bitmap
= locate_bitmap1
,
1651 .write_bitmap
= write_bitmap1
,
1652 .free_super
= free_super1
,
1653 #if __BYTE_ORDER == BIG_ENDIAN