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 * The version-1 superblock :
33 * All numeric fields are little-endian.
35 * total size: 256 bytes plus 2 per device.
36 * 1K allows 384 devices.
38 struct mdp_superblock_1
{
39 /* constant array information - 128 bytes */
40 __u32 magic
; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
41 __u32 major_version
; /* 1 */
42 __u32 feature_map
; /* 0 for now */
43 __u32 pad0
; /* always set to 0 when writing */
45 __u8 set_uuid
[16]; /* user-space generated. */
46 char set_name
[32]; /* set and interpreted by user-space */
48 __u64 ctime
; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
49 __u32 level
; /* -4 (multipath), -1 (linear), 0,1,4,5 */
50 __u32 layout
; /* only for raid5 currently */
51 __u64 size
; /* used size of component devices, in 512byte sectors */
53 __u32 chunksize
; /* in 512byte sectors */
55 __u32 bitmap_offset
; /* sectors after start of superblock that bitmap starts
56 * NOTE: signed, so bitmap can be before superblock
57 * only meaningful of feature_map[0] is set.
60 /* These are only valid with feature bit '4' */
61 __u32 new_level
; /* new level we are reshaping to */
62 __u64 reshape_position
; /* next address in array-space for reshape */
63 __u32 delta_disks
; /* change in number of raid_disks */
64 __u32 new_layout
; /* new layout */
65 __u32 new_chunk
; /* new chunk size (bytes) */
66 __u8 pad1
[128-124]; /* set to 0 when written */
68 /* constant this-device information - 64 bytes */
69 __u64 data_offset
; /* sector start of data, often 0 */
70 __u64 data_size
; /* sectors in this device that can be used for data */
71 __u64 super_offset
; /* sector start of this superblock */
72 __u64 recovery_offset
;/* sectors before this offset (from data_offset) have been recovered */
73 __u32 dev_number
; /* permanent identifier of this device - not role in raid */
74 __u32 cnt_corrected_read
; /* number of read errors that were corrected by re-writing */
75 __u8 device_uuid
[16]; /* user-space setable, ignored by kernel */
76 __u8 devflags
; /* per-device flags. Only one defined...*/
77 #define WriteMostly1 1 /* mask for writemostly flag in above */
78 __u8 pad2
[64-57]; /* set to 0 when writing */
80 /* array state information - 64 bytes */
81 __u64 utime
; /* 40 bits second, 24 btes microseconds */
82 __u64 events
; /* incremented when superblock updated */
83 __u64 resync_offset
; /* data before this offset (from data_offset) known to be in sync */
84 __u32 sb_csum
; /* checksum upto devs[max_dev] */
85 __u32 max_dev
; /* size of devs[] array to consider */
86 __u8 pad3
[64-32]; /* set to 0 when writing */
88 /* device state information. Indexed by dev_number.
90 * Note there are no per-device state flags. State information is rolled
91 * into the 'roles' value. If a device is spare or faulty, then it doesn't
92 * have a meaningful role.
94 __u16 dev_roles
[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
97 struct misc_dev_info
{
101 /* feature_map bits */
102 #define MD_FEATURE_BITMAP_OFFSET 1
103 #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
106 #define MD_FEATURE_RESHAPE_ACTIVE 4
108 #define MD_FEATURE_ALL (1|2|4)
111 #define offsetof(t,f) ((size_t)&(((t*)0)->f))
113 static unsigned int calc_sb_1_csum(struct mdp_superblock_1
* sb
)
115 unsigned int disk_csum
, csum
;
116 unsigned long long newcsum
;
117 int size
= sizeof(*sb
) + __le32_to_cpu(sb
->max_dev
)*2;
118 unsigned int *isuper
= (unsigned int*)sb
;
121 /* make sure I can count... */
122 if (offsetof(struct mdp_superblock_1
,data_offset
) != 128 ||
123 offsetof(struct mdp_superblock_1
, utime
) != 192 ||
124 sizeof(struct mdp_superblock_1
) != 256) {
125 fprintf(stderr
, "WARNING - superblock isn't sized correctly\n");
128 disk_csum
= sb
->sb_csum
;
131 for (i
=0; size
>=4; size
-= 4 ) {
132 newcsum
+= __le32_to_cpu(*isuper
);
137 newcsum
+= __le16_to_cpu(*(unsigned short*) isuper
);
139 csum
= (newcsum
& 0xffffffff) + (newcsum
>> 32);
140 sb
->sb_csum
= disk_csum
;
141 return __cpu_to_le32(csum
);
144 static char abuf
[4096+4096];
145 static int aread(int fd
, void *buf
, int len
)
148 * On devices with a 4K sector size, we need to read
149 * the full sector and copy relevant bits into
155 if (ioctl(fd
, BLKSSZGET
, &bsize
) != 0 ||
157 return read(fd
, buf
, len
);
160 b
= (char*)(((long)(abuf
+4096))&~4095UL);
162 n
= read(fd
, b
, bsize
);
165 lseek(fd
, len
- n
, 1);
172 static int awrite(int fd
, void *buf
, int len
)
175 * On devices with a 4K sector size, we need to write
176 * the full sector. We pre-read if the sector is larger
178 * The address must be sector-aligned.
183 if (ioctl(fd
, BLKSSZGET
, &bsize
) != 0 ||
185 return write(fd
, buf
, len
);
188 b
= (char*)(((long)(abuf
+4096))&~4095UL);
190 n
= read(fd
, b
, bsize
);
195 n
= write(fd
, b
, bsize
);
198 lseek(fd
, len
- n
, 1);
203 static void examine_super1(struct supertype
*st
, char *homehost
)
205 struct mdp_superblock_1
*sb
= st
->sb
;
211 int l
= homehost
? strlen(homehost
) : 0;
213 unsigned long long sb_offset
;
215 printf(" Magic : %08x\n", __le32_to_cpu(sb
->magic
));
216 printf(" Version : 1");
217 sb_offset
= __le64_to_cpu(sb
->super_offset
);
220 else if (sb_offset
<= 8)
224 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb
->feature_map
));
225 printf(" Array UUID : ");
226 for (i
=0; i
<16; i
++) {
227 if ((i
&3)==0 && i
!= 0) printf(":");
228 printf("%02x", sb
->set_uuid
[i
]);
231 printf(" Name : %.32s", sb
->set_name
);
232 if (l
> 0 && l
< 32 &&
233 sb
->set_name
[l
] == ':' &&
234 strncmp(sb
->set_name
, homehost
, l
) == 0)
235 printf(" (local to host %s)", homehost
);
237 atime
= __le64_to_cpu(sb
->ctime
) & 0xFFFFFFFFFFULL
;
238 printf(" Creation Time : %.24s\n", ctime(&atime
));
239 c
=map_num(pers
, __le32_to_cpu(sb
->level
));
240 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
241 printf(" Raid Devices : %d\n", __le32_to_cpu(sb
->raid_disks
));
243 printf(" Avail Dev Size : %llu%s\n",
244 (unsigned long long)__le64_to_cpu(sb
->data_size
),
245 human_size(__le64_to_cpu(sb
->data_size
)<<9));
246 if (__le32_to_cpu(sb
->level
) >= 0) {
248 switch(__le32_to_cpu(sb
->level
)) {
249 case 1: ddsks
=1;break;
251 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
252 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
254 layout
= __le32_to_cpu(sb
->layout
);
255 ddsks
= __le32_to_cpu(sb
->raid_disks
)
256 / (layout
&255) / ((layout
>>8)&255);
259 printf(" Array Size : %llu%s\n",
260 ddsks
*(unsigned long long)__le64_to_cpu(sb
->size
),
261 human_size(ddsks
*__le64_to_cpu(sb
->size
)<<9));
262 if (sb
->size
!= sb
->data_size
)
263 printf(" Used Dev Size : %llu%s\n",
264 (unsigned long long)__le64_to_cpu(sb
->size
),
265 human_size(__le64_to_cpu(sb
->size
)<<9));
268 printf(" Data Offset : %llu sectors\n",
269 (unsigned long long)__le64_to_cpu(sb
->data_offset
));
270 printf(" Super Offset : %llu sectors\n",
271 (unsigned long long)__le64_to_cpu(sb
->super_offset
));
272 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_RECOVERY_OFFSET
)
273 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb
->recovery_offset
));
274 printf(" State : %s\n", (__le64_to_cpu(sb
->resync_offset
)+1)? "active":"clean");
275 printf(" Device UUID : ");
276 for (i
=0; i
<16; i
++) {
277 if ((i
&3)==0 && i
!= 0) printf(":");
278 printf("%02x", sb
->device_uuid
[i
]);
282 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
283 printf("Internal Bitmap : %ld sectors from superblock\n",
284 (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
));
286 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
287 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb
->reshape_position
)/2,
288 human_size(__le64_to_cpu(sb
->reshape_position
)<<9));
289 if (__le32_to_cpu(sb
->delta_disks
)) {
290 printf(" Delta Devices : %d", __le32_to_cpu(sb
->delta_disks
));
291 if (__le32_to_cpu(sb
->delta_disks
))
292 printf(" (%d->%d)\n",
293 __le32_to_cpu(sb
->raid_disks
)-__le32_to_cpu(sb
->delta_disks
),
294 __le32_to_cpu(sb
->raid_disks
));
296 printf(" (%d->%d)\n", __le32_to_cpu(sb
->raid_disks
),
297 __le32_to_cpu(sb
->raid_disks
)+__le32_to_cpu(sb
->delta_disks
));
299 if (__le32_to_cpu(sb
->new_level
) != __le32_to_cpu(sb
->level
)) {
300 c
= map_num(pers
, __le32_to_cpu(sb
->new_level
));
301 printf(" New Level : %s\n", c
?c
:"-unknown-");
303 if (__le32_to_cpu(sb
->new_layout
) != __le32_to_cpu(sb
->layout
)) {
304 if (__le32_to_cpu(sb
->level
) == 5) {
305 c
= map_num(r5layout
, __le32_to_cpu(sb
->new_layout
));
306 printf(" New Layout : %s\n", c
?c
:"-unknown-");
308 if (__le32_to_cpu(sb
->level
) == 10) {
309 printf(" New Layout :");
310 print_r10_layout(__le32_to_cpu(sb
->new_layout
));
314 if (__le32_to_cpu(sb
->new_chunk
) != __le32_to_cpu(sb
->chunksize
))
315 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb
->new_chunk
)/2);
320 if (sb
->devflags
& WriteMostly1
)
321 printf(" write-mostly");
325 atime
= __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
;
326 printf(" Update Time : %.24s\n", ctime(&atime
));
328 if (calc_sb_1_csum(sb
) == sb
->sb_csum
)
329 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb
->sb_csum
));
331 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb
->sb_csum
),
332 __le32_to_cpu(calc_sb_1_csum(sb
)));
333 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb
->events
));
335 if (__le32_to_cpu(sb
->level
) == 5) {
336 c
= map_num(r5layout
, __le32_to_cpu(sb
->layout
));
337 printf(" Layout : %s\n", c
?c
:"-unknown-");
339 if (__le32_to_cpu(sb
->level
) == 10) {
340 int lo
= __le32_to_cpu(sb
->layout
);
342 print_r10_layout(lo
);
345 switch(__le32_to_cpu(sb
->level
)) {
351 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
354 printf(" Rounding : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
360 /* This turns out to just be confusing */
361 printf(" Array Slot : %d (", __le32_to_cpu(sb
->dev_number
));
362 for (i
= __le32_to_cpu(sb
->max_dev
); i
> 0 ; i
--)
363 if (__le16_to_cpu(sb
->dev_roles
[i
-1]) != 0xffff)
365 for (d
=0; d
< i
; d
++) {
366 int role
= __le16_to_cpu(sb
->dev_roles
[d
]);
368 if (role
== 0xffff) printf("empty");
369 else if(role
== 0xfffe) printf("failed");
370 else printf("%d", role
);
374 printf(" Device Role : ");
375 d
= __le32_to_cpu(sb
->dev_number
);
376 if (d
< sb
->raid_disks
)
377 role
= __le16_to_cpu(sb
->dev_roles
[d
]);
383 printf("Active device %d\n", role
);
385 printf(" Array State : ");
386 for (d
=0; d
<__le32_to_cpu(sb
->raid_disks
); d
++) {
390 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
391 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
393 if (i
== __le32_to_cpu(sb
->dev_number
))
398 if (cnt
> 1) printf("?");
399 else if (cnt
== 1) printf("A");
403 /* This is confusing too */
405 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
406 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
410 if (faulty
) printf(" %d failed", faulty
);
412 printf(" ('A' == active, '.' == missing)");
417 static void brief_examine_super1(struct supertype
*st
)
419 struct mdp_superblock_1
*sb
= st
->sb
;
421 unsigned long long sb_offset
;
423 char *c
=map_num(pers
, __le32_to_cpu(sb
->level
));
425 nm
= strchr(sb
->set_name
, ':');
428 else if (sb
->set_name
[0])
433 printf("ARRAY%s%s level=%s ",
434 nm
? " /dev/md/":"", nm
,
436 sb_offset
= __le64_to_cpu(sb
->super_offset
);
438 printf("metadata=1.1 ");
439 else if (sb_offset
<= 8)
440 printf("metadata=1.2 ");
442 printf("metadata=1.0 ");
443 printf("num-devices=%d UUID=", __le32_to_cpu(sb
->raid_disks
));
444 for (i
=0; i
<16; i
++) {
445 if ((i
&3)==0 && i
!= 0) printf(":");
446 printf("%02x", sb
->set_uuid
[i
]);
449 printf(" name=%.32s", sb
->set_name
);
453 static void export_examine_super1(struct supertype
*st
)
455 struct mdp_superblock_1
*sb
= st
->sb
;
459 printf("MD_LEVEL=%s\n", map_num(pers
, __le32_to_cpu(sb
->level
)));
460 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb
->raid_disks
));
462 if (sb
->set_name
[i
] == '\n' ||
463 sb
->set_name
[i
] == '\0') {
468 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
470 for (i
=0; i
<16; i
++) {
471 if ((i
&3)==0 && i
!= 0) printf(":");
472 printf("%02x", sb
->set_uuid
[i
]);
475 printf("MD_UPDATE_TIME=%llu\n",
476 __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
);
477 printf("MD_DEV_UUID=");
478 for (i
=0; i
<16; i
++) {
479 if ((i
&3)==0 && i
!= 0) printf(":");
480 printf("%02x", sb
->device_uuid
[i
]);
483 printf("MD_EVENTS=%llu\n",
484 (unsigned long long)__le64_to_cpu(sb
->events
));
487 static void detail_super1(struct supertype
*st
, char *homehost
)
489 struct mdp_superblock_1
*sb
= st
->sb
;
491 int l
= homehost
? strlen(homehost
) : 0;
493 printf(" Name : %.32s", sb
->set_name
);
494 if (l
> 0 && l
< 32 &&
495 sb
->set_name
[l
] == ':' &&
496 strncmp(sb
->set_name
, homehost
, l
) == 0)
497 printf(" (local to host %s)", homehost
);
498 printf("\n UUID : ");
499 for (i
=0; i
<16; i
++) {
500 if ((i
&3)==0 && i
!= 0) printf(":");
501 printf("%02x", sb
->set_uuid
[i
]);
503 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb
->events
));
506 static void brief_detail_super1(struct supertype
*st
)
508 struct mdp_superblock_1
*sb
= st
->sb
;
512 printf(" name=%.32s", sb
->set_name
);
514 for (i
=0; i
<16; i
++) {
515 if ((i
&3)==0 && i
!= 0) printf(":");
516 printf("%02x", sb
->set_uuid
[i
]);
520 static void export_detail_super1(struct supertype
*st
)
522 struct mdp_superblock_1
*sb
= st
->sb
;
527 if (sb
->set_name
[i
] == '\n' ||
528 sb
->set_name
[i
] == '\0') {
533 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
538 static int match_home1(struct supertype
*st
, char *homehost
)
540 struct mdp_superblock_1
*sb
= st
->sb
;
541 int l
= homehost
? strlen(homehost
) : 0;
543 return (l
> 0 && l
< 32 &&
544 sb
->set_name
[l
] == ':' &&
545 strncmp(sb
->set_name
, homehost
, l
) == 0);
548 static void uuid_from_super1(struct supertype
*st
, int uuid
[4])
550 struct mdp_superblock_1
*super
= st
->sb
;
551 char *cuuid
= (char*)uuid
;
554 cuuid
[i
] = super
->set_uuid
[i
];
557 static void getinfo_super1(struct supertype
*st
, struct mdinfo
*info
)
559 struct mdp_superblock_1
*sb
= st
->sb
;
564 info
->array
.major_version
= 1;
565 info
->array
.minor_version
= st
->minor_version
;
566 info
->array
.patch_version
= 0;
567 info
->array
.raid_disks
= __le32_to_cpu(sb
->raid_disks
);
568 info
->array
.level
= __le32_to_cpu(sb
->level
);
569 info
->array
.layout
= __le32_to_cpu(sb
->layout
);
570 info
->array
.md_minor
= -1;
571 info
->array
.ctime
= __le64_to_cpu(sb
->ctime
);
572 info
->array
.utime
= __le64_to_cpu(sb
->utime
);
573 info
->array
.chunk_size
= __le32_to_cpu(sb
->chunksize
)*512;
575 (__le64_to_cpu(sb
->resync_offset
) >= __le64_to_cpu(sb
->size
))
578 info
->data_offset
= __le64_to_cpu(sb
->data_offset
);
579 info
->component_size
= __le64_to_cpu(sb
->size
);
581 info
->disk
.major
= 0;
582 info
->disk
.minor
= 0;
583 info
->disk
.number
= __le32_to_cpu(sb
->dev_number
);
584 if (__le32_to_cpu(sb
->dev_number
) >= __le32_to_cpu(sb
->max_dev
) ||
585 __le32_to_cpu(sb
->max_dev
) > 512)
588 role
= __le16_to_cpu(sb
->dev_roles
[__le32_to_cpu(sb
->dev_number
)]);
590 info
->disk
.raid_disk
= -1;
593 info
->disk
.state
= 2; /* spare: ACTIVE, not sync, not faulty */
596 info
->disk
.state
= 1; /* faulty */
599 info
->disk
.state
= 6; /* active and in sync */
600 info
->disk
.raid_disk
= role
;
602 info
->events
= __le64_to_cpu(sb
->events
);
603 sprintf(info
->text_version
, "1.%d", st
->minor_version
);
604 info
->safe_mode_delay
= 200;
606 memcpy(info
->uuid
, sb
->set_uuid
, 16);
608 strncpy(info
->name
, sb
->set_name
, 32);
611 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
612 info
->reshape_active
= 1;
613 info
->reshape_progress
= __le64_to_cpu(sb
->reshape_position
);
614 info
->new_level
= __le32_to_cpu(sb
->new_level
);
615 info
->delta_disks
= __le32_to_cpu(sb
->delta_disks
);
616 info
->new_layout
= __le32_to_cpu(sb
->new_layout
);
617 info
->new_chunk
= __le32_to_cpu(sb
->new_chunk
)<<9;
619 info
->reshape_active
= 0;
621 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
622 role
= __le16_to_cpu(sb
->dev_roles
[i
]);
623 if (/*role == 0xFFFF || */role
< info
->array
.raid_disks
)
627 info
->array
.working_disks
= working
;
630 static int update_super1(struct supertype
*st
, struct mdinfo
*info
,
632 char *devname
, int verbose
,
633 int uuid_set
, char *homehost
)
635 /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
636 * For others, the return value is ignored.
639 struct mdp_superblock_1
*sb
= st
->sb
;
641 if (strcmp(update
, "force-one")==0) {
642 /* Not enough devices for a working array,
643 * so bring this one up-to-date
645 if (sb
->events
!= __cpu_to_le64(info
->events
))
647 sb
->events
= __cpu_to_le64(info
->events
);
649 if (strcmp(update
, "force-array")==0) {
650 /* Degraded array and 'force' requests to
651 * maybe need to mark it 'clean'.
653 switch(__le32_to_cpu(sb
->level
)) {
654 case 5: case 4: case 6:
655 /* need to force clean */
656 if (sb
->resync_offset
!= ~0ULL)
658 sb
->resync_offset
= ~0ULL;
661 if (strcmp(update
, "assemble")==0) {
662 int d
= info
->disk
.number
;
664 if (info
->disk
.state
== 6)
665 want
= __cpu_to_le32(info
->disk
.raid_disk
);
668 if (sb
->dev_roles
[d
] != want
) {
669 sb
->dev_roles
[d
] = want
;
673 if (strcmp(update
, "linear-grow-new") == 0) {
676 int max
= __le32_to_cpu(sb
->max_dev
);
678 for (i
=0 ; i
< max
; i
++)
679 if (__le16_to_cpu(sb
->dev_roles
[i
]) >= 0xfffe)
681 sb
->dev_number
= __cpu_to_le32(i
);
682 info
->disk
.number
= i
;
683 if (max
>= __le32_to_cpu(sb
->max_dev
))
684 sb
->max_dev
= __cpu_to_le32(max
+1);
686 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
687 read(rfd
, sb
->device_uuid
, 16) != 16) {
688 *(__u32
*)(sb
->device_uuid
) = random();
689 *(__u32
*)(sb
->device_uuid
+4) = random();
690 *(__u32
*)(sb
->device_uuid
+8) = random();
691 *(__u32
*)(sb
->device_uuid
+12) = random();
695 __cpu_to_le16(info
->disk
.raid_disk
);
697 fd
= open(devname
, O_RDONLY
);
699 unsigned long long ds
;
700 get_dev_size(fd
, devname
, &ds
);
703 if (__le64_to_cpu(sb
->super_offset
) <
704 __le64_to_cpu(sb
->data_offset
)) {
705 sb
->data_size
= __cpu_to_le64(
706 ds
- __le64_to_cpu(sb
->data_offset
));
709 ds
&= ~(unsigned long long)(4*2-1);
710 sb
->super_offset
= __cpu_to_le64(ds
);
711 sb
->data_size
= __cpu_to_le64(
712 ds
- __le64_to_cpu(sb
->data_offset
));
716 if (strcmp(update
, "linear-grow-update") == 0) {
717 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
718 sb
->dev_roles
[info
->disk
.number
] =
719 __cpu_to_le16(info
->disk
.raid_disk
);
721 if (strcmp(update
, "resync") == 0) {
722 /* make sure resync happens */
723 sb
->resync_offset
= 0ULL;
725 if (strcmp(update
, "uuid") == 0) {
726 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
728 if (__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
729 struct bitmap_super_s
*bm
;
730 bm
= (struct bitmap_super_s
*)(st
->sb
+1024);
731 memcpy(bm
->uuid
, sb
->set_uuid
, 16);
734 if (strcmp(update
, "homehost") == 0 &&
738 c
= strchr(sb
->set_name
, ':');
740 strncpy(info
->name
, c
+1, 31 - (c
-sb
->set_name
));
742 strncpy(info
->name
, sb
->set_name
, 32);
745 if (strcmp(update
, "name") == 0) {
746 if (info
->name
[0] == 0)
747 sprintf(info
->name
, "%d", info
->array
.md_minor
);
748 memset(sb
->set_name
, 0, sizeof(sb
->set_name
));
750 strchr(info
->name
, ':') == NULL
&&
751 strlen(homehost
)+1+strlen(info
->name
) < 32) {
752 strcpy(sb
->set_name
, homehost
);
753 strcat(sb
->set_name
, ":");
754 strcat(sb
->set_name
, info
->name
);
756 strcpy(sb
->set_name
, info
->name
);
758 if (strcmp(update
, "devicesize") == 0 &&
759 __le64_to_cpu(sb
->super_offset
) <
760 __le64_to_cpu(sb
->data_offset
)) {
761 /* set data_size to device size less data_offset */
762 struct misc_dev_info
*misc
= (struct misc_dev_info
*)
763 (st
->sb
+ 1024 + 512);
764 printf("Size was %llu\n", (unsigned long long)
765 __le64_to_cpu(sb
->data_size
));
766 sb
->data_size
= __cpu_to_le64(
767 misc
->device_size
- __le64_to_cpu(sb
->data_offset
));
768 printf("Size is %llu\n", (unsigned long long)
769 __le64_to_cpu(sb
->data_size
));
771 if (strcmp(update
, "_reshape_progress")==0)
772 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
774 sb
->sb_csum
= calc_sb_1_csum(sb
);
778 static int init_super1(struct supertype
*st
, mdu_array_info_t
*info
,
779 unsigned long long size
, char *name
, char *homehost
, int *uuid
)
781 struct mdp_superblock_1
*sb
;
786 if (posix_memalign((void**)&sb
, 512, (1024 + 512 +
787 sizeof(struct misc_dev_info
))) != 0) {
789 ": %s could not allocate superblock\n", __func__
);
796 /* zeroing superblock */
800 spares
= info
->working_disks
- info
->active_disks
;
801 if (info
->raid_disks
+ spares
> 384) {
802 fprintf(stderr
, Name
": too many devices requested: %d+%d > %d\n",
803 info
->raid_disks
, spares
, 384);
807 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
808 sb
->major_version
= __cpu_to_le32(1);
813 copy_uuid(sb
->set_uuid
, uuid
, super1
.swapuuid
);
815 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
816 read(rfd
, sb
->set_uuid
, 16) != 16) {
817 *(__u32
*)(sb
->set_uuid
) = random();
818 *(__u32
*)(sb
->set_uuid
+4) = random();
819 *(__u32
*)(sb
->set_uuid
+8) = random();
820 *(__u32
*)(sb
->set_uuid
+12) = random();
822 if (rfd
>= 0) close(rfd
);
825 if (name
== NULL
|| *name
== 0) {
826 sprintf(defname
, "%d", info
->md_minor
);
829 memset(sb
->set_name
, 0, 32);
831 strchr(name
, ':')== NULL
&&
832 strlen(homehost
)+1+strlen(name
) < 32) {
833 strcpy(sb
->set_name
, homehost
);
834 strcat(sb
->set_name
, ":");
835 strcat(sb
->set_name
, name
);
837 strcpy(sb
->set_name
, name
);
839 sb
->ctime
= __cpu_to_le64((unsigned long long)time(0));
840 sb
->level
= __cpu_to_le32(info
->level
);
841 sb
->layout
= __cpu_to_le32(info
->layout
);
842 sb
->size
= __cpu_to_le64(size
*2ULL);
843 sb
->chunksize
= __cpu_to_le32(info
->chunk_size
>>9);
844 sb
->raid_disks
= __cpu_to_le32(info
->raid_disks
);
846 sb
->data_offset
= __cpu_to_le64(0);
847 sb
->data_size
= __cpu_to_le64(0);
848 sb
->super_offset
= __cpu_to_le64(0);
849 sb
->recovery_offset
= __cpu_to_le64(0);
851 sb
->utime
= sb
->ctime
;
852 sb
->events
= __cpu_to_le64(1);
853 if (info
->state
& (1<<MD_SB_CLEAN
))
854 sb
->resync_offset
= ~0ULL;
856 sb
->resync_offset
= 0;
857 sb
->max_dev
= __cpu_to_le32((1024- sizeof(struct mdp_superblock_1
))/
858 sizeof(sb
->dev_roles
[0]));
859 memset(sb
->pad3
, 0, sizeof(sb
->pad3
));
861 memset(sb
->dev_roles
, 0xff, 1024 - sizeof(struct mdp_superblock_1
));
869 mdu_disk_info_t disk
;
870 struct devinfo
*next
;
873 /* Add a device to the superblock being created */
874 static int add_to_super1(struct supertype
*st
, mdu_disk_info_t
*dk
,
875 int fd
, char *devname
)
877 struct mdp_superblock_1
*sb
= st
->sb
;
878 __u16
*rp
= sb
->dev_roles
+ dk
->number
;
879 struct devinfo
*di
, **dip
;
881 if ((dk
->state
& 6) == 6) /* active, sync */
882 *rp
= __cpu_to_le16(dk
->raid_disk
);
883 else if ((dk
->state
& ~2) == 0) /* active or idle -> spare */
888 sb
->dev_number
= __cpu_to_le32(dk
->number
);
889 sb
->sb_csum
= calc_sb_1_csum(sb
);
891 dip
= (struct devinfo
**)&st
->info
;
894 di
= malloc(sizeof(struct devinfo
));
896 di
->devname
= devname
;
905 static void locate_bitmap1(struct supertype
*st
, int fd
);
907 static int store_super1(struct supertype
*st
, int fd
)
909 struct mdp_superblock_1
*sb
= st
->sb
;
910 unsigned long long sb_offset
;
912 unsigned long long dsize
;
914 if (!get_dev_size(fd
, NULL
, &dsize
))
923 * Calculate the position of the superblock.
924 * It is always aligned to a 4K boundary and
925 * depending on minor_version, it can be:
926 * 0: At least 8K, but less than 12K, from end of device
927 * 1: At start of device
928 * 2: 4K from start of device.
930 switch(st
->minor_version
) {
934 sb_offset
&= ~(4*2-1);
948 if (sb_offset
!= __le64_to_cpu(sb
->super_offset
) &&
949 0 != __le64_to_cpu(sb
->super_offset
)
951 fprintf(stderr
, Name
": internal error - sb_offset is wrong\n");
955 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL)
958 sbsize
= sizeof(*sb
) + 2 * __le32_to_cpu(sb
->max_dev
);
959 sbsize
= (sbsize
+511)&(~511UL);
961 if (awrite(fd
, sb
, sbsize
) != sbsize
)
964 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
965 struct bitmap_super_s
*bm
= (struct bitmap_super_s
*)
967 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
) {
968 locate_bitmap1(st
, fd
);
969 if (awrite(fd
, bm
, sizeof(*bm
)) !=
978 static int load_super1(struct supertype
*st
, int fd
, char *devname
);
980 static unsigned long choose_bm_space(unsigned long devsize
)
982 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
983 * if bigger than 200Gig, save 128k
985 if (devsize
< 64*2) return 0;
986 if (devsize
- 64*2 >= 200*1024*1024*2)
988 if (devsize
- 4*2 > 8*1024*1024*2)
994 static int write_init_super1(struct supertype
*st
)
996 struct mdp_superblock_1
*sb
= st
->sb
;
997 struct supertype refst
;
1002 unsigned long long dsize
, array_size
;
1003 long long sb_offset
;
1005 for (di
= st
->info
; di
&& ! rv
; di
= di
->next
) {
1006 if (di
->disk
.state
== 1)
1011 Kill(di
->devname
, 0, 1, 1);
1012 Kill(di
->devname
, 0, 1, 1);
1014 sb
->dev_number
= __cpu_to_le32(di
->disk
.number
);
1015 if (di
->disk
.state
& (1<<MD_DISK_WRITEMOSTLY
))
1016 sb
->devflags
|= __cpu_to_le32(WriteMostly1
);
1018 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1019 read(rfd
, sb
->device_uuid
, 16) != 16) {
1020 *(__u32
*)(sb
->device_uuid
) = random();
1021 *(__u32
*)(sb
->device_uuid
+4) = random();
1022 *(__u32
*)(sb
->device_uuid
+8) = random();
1023 *(__u32
*)(sb
->device_uuid
+12) = random();
1025 if (rfd
>= 0) close(rfd
);
1030 if (load_super1(&refst
, di
->fd
, NULL
)==0) {
1031 struct mdp_superblock_1
*refsb
= refst
.sb
;
1033 memcpy(sb
->device_uuid
, refsb
->device_uuid
, 16);
1034 if (memcmp(sb
->set_uuid
, refsb
->set_uuid
, 16)==0) {
1035 /* same array, so preserve events and
1037 sb
->events
= refsb
->events
;
1038 /* bugs in 2.6.17 and earlier mean the
1039 * dev_number chosen in Manage must be preserved
1041 if (get_linux_version() >= 2006018)
1042 sb
->dev_number
= refsb
->dev_number
;
1047 if (!get_dev_size(di
->fd
, NULL
, &dsize
))
1058 * Calculate the position of the superblock.
1059 * It is always aligned to a 4K boundary and
1060 * depending on minor_version, it can be:
1061 * 0: At least 8K, but less than 12K, from end of device
1062 * 1: At start of device
1063 * 2: 4K from start of device.
1064 * Depending on the array size, we might leave extra space
1067 array_size
= __le64_to_cpu(sb
->size
);
1068 /* work out how much space we left for a bitmap */
1069 bm_space
= choose_bm_space(array_size
);
1071 switch(st
->minor_version
) {
1075 sb_offset
&= ~(4*2-1);
1076 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1077 sb
->data_offset
= __cpu_to_le64(0);
1078 if (sb_offset
- bm_space
< array_size
)
1079 bm_space
= sb_offset
- array_size
;
1080 sb
->data_size
= __cpu_to_le64(sb_offset
- bm_space
);
1083 sb
->super_offset
= __cpu_to_le64(0);
1084 if (4*2 + bm_space
+ __le64_to_cpu(sb
->size
) > dsize
)
1085 bm_space
= dsize
- __le64_to_cpu(sb
->size
) -4*2;
1086 sb
->data_offset
= __cpu_to_le64(bm_space
+ 4*2);
1087 sb
->data_size
= __cpu_to_le64(dsize
- bm_space
- 4*2);
1091 sb
->super_offset
= __cpu_to_le64(4*2);
1092 if (4*2 + 4*2 + bm_space
+ __le64_to_cpu(sb
->size
)
1094 bm_space
= dsize
- __le64_to_cpu(sb
->size
)
1096 sb
->data_offset
= __cpu_to_le64(4*2 + 4*2 + bm_space
);
1097 sb
->data_size
= __cpu_to_le64(dsize
- 4*2 - 4*2
1105 sb
->sb_csum
= calc_sb_1_csum(sb
);
1106 rv
= store_super1(st
, di
->fd
);
1109 Name
": failed to write superblock to %s\n",
1112 if (rv
== 0 && (__le32_to_cpu(sb
->feature_map
) & 1))
1113 rv
= st
->ss
->write_bitmap(st
, di
->fd
);
1121 static int compare_super1(struct supertype
*st
, struct supertype
*tst
)
1125 * 0 same, or first was empty, and second was copied
1126 * 1 second had wrong number
1128 * 3 wrong other info
1130 struct mdp_superblock_1
*first
= st
->sb
;
1131 struct mdp_superblock_1
*second
= tst
->sb
;
1133 if (second
->magic
!= __cpu_to_le32(MD_SB_MAGIC
))
1135 if (second
->major_version
!= __cpu_to_le32(1))
1139 if (posix_memalign((void**)&first
, 512,
1141 sizeof(struct misc_dev_info
)) != 0) {
1142 fprintf(stderr
, Name
1143 ": %s could not allocate superblock\n", __func__
);
1146 memcpy(first
, second
, 1024 + 512 +
1147 sizeof(struct misc_dev_info
));
1151 if (memcmp(first
->set_uuid
, second
->set_uuid
, 16)!= 0)
1154 if (first
->ctime
!= second
->ctime
||
1155 first
->level
!= second
->level
||
1156 first
->layout
!= second
->layout
||
1157 first
->size
!= second
->size
||
1158 first
->chunksize
!= second
->chunksize
||
1159 first
->raid_disks
!= second
->raid_disks
)
1164 static void free_super1(struct supertype
*st
);
1166 static int load_super1(struct supertype
*st
, int fd
, char *devname
)
1168 unsigned long long dsize
;
1169 unsigned long long sb_offset
;
1170 struct mdp_superblock_1
*super
;
1172 struct bitmap_super_s
*bsb
;
1173 struct misc_dev_info
*misc
;
1177 if (st
->subarray
[0])
1180 if (st
->ss
== NULL
|| st
->minor_version
== -1) {
1182 struct supertype tst
;
1183 __u64 bestctime
= 0;
1184 /* guess... choose latest ctime */
1185 memset(&tst
, 0, sizeof(tst
));
1187 for (tst
.minor_version
= 0; tst
.minor_version
<= 2 ; tst
.minor_version
++) {
1188 switch(load_super1(&tst
, fd
, devname
)) {
1189 case 0: super
= tst
.sb
;
1190 if (bestvers
== -1 ||
1191 bestctime
< __le64_to_cpu(super
->ctime
)) {
1192 bestvers
= tst
.minor_version
;
1193 bestctime
= __le64_to_cpu(super
->ctime
);
1198 case 1: return 1; /*bad device */
1199 case 2: break; /* bad, try next */
1202 if (bestvers
!= -1) {
1204 tst
.minor_version
= bestvers
;
1207 rv
= load_super1(&tst
, fd
, devname
);
1214 if (!get_dev_size(fd
, devname
, &dsize
))
1220 fprintf(stderr
, Name
": %s is too small for md: size is %llu sectors.\n",
1226 * Calculate the position of the superblock.
1227 * It is always aligned to a 4K boundary and
1228 * depending on minor_version, it can be:
1229 * 0: At least 8K, but less than 12K, from end of device
1230 * 1: At start of device
1231 * 2: 4K from start of device.
1233 switch(st
->minor_version
) {
1237 sb_offset
&= ~(4*2-1);
1249 ioctl(fd
, BLKFLSBUF
, 0); /* make sure we read current data */
1252 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL) {
1254 fprintf(stderr
, Name
": Cannot seek to superblock on %s: %s\n",
1255 devname
, strerror(errno
));
1259 if (posix_memalign((void**)&super
, 512,
1261 sizeof(struct misc_dev_info
)) != 0) {
1262 fprintf(stderr
, Name
": %s could not allocate superblock\n",
1267 if (aread(fd
, super
, 1024) != 1024) {
1269 fprintf(stderr
, Name
": Cannot read superblock on %s\n",
1275 if (__le32_to_cpu(super
->magic
) != MD_SB_MAGIC
) {
1277 fprintf(stderr
, Name
": No super block found on %s (Expected magic %08x, got %08x)\n",
1278 devname
, MD_SB_MAGIC
, __le32_to_cpu(super
->magic
));
1283 if (__le32_to_cpu(super
->major_version
) != 1) {
1285 fprintf(stderr
, Name
": Cannot interpret superblock on %s - version is %d\n",
1286 devname
, __le32_to_cpu(super
->major_version
));
1290 if (__le64_to_cpu(super
->super_offset
) != sb_offset
) {
1292 fprintf(stderr
, Name
": No superblock found on %s (super_offset is wrong)\n",
1299 bsb
= (struct bitmap_super_s
*)(((char*)super
)+1024);
1301 misc
= (struct misc_dev_info
*) (((char*)super
)+1024+512);
1302 misc
->device_size
= dsize
;
1304 /* Now check on the bitmap superblock */
1305 if ((__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) == 0)
1307 /* Read the bitmap superblock and make sure it looks
1308 * valid. If it doesn't clear the bit. An --assemble --force
1309 * should get that written out.
1311 locate_bitmap1(st
, fd
);
1312 if (aread(fd
, ((char*)super
)+1024, 512)
1316 uuid_from_super1(st
, uuid
);
1317 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
1318 memcmp(bsb
->uuid
, uuid
, 16) != 0)
1323 super
->feature_map
= __cpu_to_le32(__le32_to_cpu(super
->feature_map
) & ~1);
1328 static struct supertype
*match_metadata_desc1(char *arg
)
1330 struct supertype
*st
= malloc(sizeof(*st
));
1333 memset(st
, 0, sizeof(*st
));
1337 /* leading zeros can be safely ignored. --detail generates them. */
1340 if (strcmp(arg
, "1.0") == 0 ||
1341 strcmp(arg
, "1.00") == 0) {
1342 st
->minor_version
= 0;
1345 if (strcmp(arg
, "1.1") == 0 ||
1346 strcmp(arg
, "1.01") == 0) {
1347 st
->minor_version
= 1;
1350 if (strcmp(arg
, "1.2") == 0 ||
1351 strcmp(arg
, "1.02") == 0) {
1352 st
->minor_version
= 2;
1355 if (strcmp(arg
, "1") == 0 ||
1356 strcmp(arg
, "default") == 0) {
1357 st
->minor_version
= -1;
1365 /* find available size on device with this devsize, using
1366 * superblock type st, and reserving 'reserve' sectors for
1369 static __u64
avail_size1(struct supertype
*st
, __u64 devsize
)
1371 struct mdp_superblock_1
*super
= st
->sb
;
1376 /* creating: allow suitable space for bitmap */
1377 devsize
-= choose_bm_space(devsize
);
1379 else if (__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
1380 /* hot-add. allow for actual size of bitmap */
1381 struct bitmap_super_s
*bsb
;
1382 bsb
= (struct bitmap_super_s
*)(((char*)super
)+1024);
1383 devsize
-= bitmap_sectors(bsb
);
1387 switch(st
->minor_version
) {
1388 case -1: /* no specified. Now time to set default */
1389 st
->minor_version
= 0;
1393 return ((devsize
- 8*2 ) & ~(4*2-1));
1395 /* at start, 4K for superblock and possible bitmap */
1396 return devsize
- 4*2;
1398 /* 4k from start, 4K for superblock and possible bitmap */
1399 return devsize
- (4+4)*2;
1405 add_internal_bitmap1(struct supertype
*st
,
1406 int *chunkp
, int delay
, int write_behind
,
1407 unsigned long long size
,
1408 int may_change
, int major
)
1411 * If not may_change, then this is a 'Grow', and the bitmap
1412 * must fit after the superblock.
1413 * If may_change, then this is create, and we can put the bitmap
1414 * before the superblock if we like, or may move the start.
1415 * If !may_change, the bitmap MUST live at offset of 1K, until
1416 * we get a sysfs interface.
1418 * size is in sectors, chunk is in bytes !!!
1421 unsigned long long bits
;
1422 unsigned long long max_bits
;
1423 unsigned long long min_chunk
;
1425 int chunk
= *chunkp
;
1427 struct mdp_superblock_1
*sb
= st
->sb
;
1428 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + 1024);
1430 switch(st
->minor_version
) {
1432 /* either 3K after the superblock, or some amount of space
1436 /* We are creating array, so we *know* how much room has
1440 room
= choose_bm_space(__le64_to_cpu(sb
->size
));
1442 /* make it 3K after the superblock */
1447 room
= __le64_to_cpu(sb
->super_offset
)
1448 - __le64_to_cpu(sb
->data_offset
)
1449 - __le64_to_cpu(sb
->data_size
);
1450 /* remove '1 ||' when we can set offset via sysfs */
1451 if (1 || (room
< 3*2 &&
1452 __le32_to_cpu(sb
->max_dev
) <= 384)) {
1456 offset
= 0; /* means movable offset */
1461 case 2: /* between superblock and data */
1464 room
= choose_bm_space(__le64_to_cpu(sb
->size
));
1466 room
= __le64_to_cpu(sb
->data_offset
)
1467 - __le64_to_cpu(sb
->super_offset
);
1468 if (1 || __le32_to_cpu(sb
->max_dev
) <= 384) {
1481 if (chunk
== UnSet
&& room
> 128*2)
1482 /* Limit to 128K of bitmap when chunk size not requested */
1485 max_bits
= (room
* 512 - sizeof(bitmap_super_t
)) * 8;
1487 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
1488 bits
= (size
*512)/min_chunk
+1;
1489 while (bits
> max_bits
) {
1495 else if (chunk
< min_chunk
)
1496 return 0; /* chunk size too small */
1497 if (chunk
== 0) /* rounding problem */
1501 bits
= (size
*512) / chunk
+ 1;
1502 room
= ((bits
+7)/8 + sizeof(bitmap_super_t
) +511)/512;
1506 sb
->bitmap_offset
= __cpu_to_le32(offset
);
1508 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
) | 1);
1509 memset(bms
, 0, sizeof(*bms
));
1510 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
1511 bms
->version
= __cpu_to_le32(major
);
1512 uuid_from_super1(st
, (int*)bms
->uuid
);
1513 bms
->chunksize
= __cpu_to_le32(chunk
);
1514 bms
->daemon_sleep
= __cpu_to_le32(delay
);
1515 bms
->sync_size
= __cpu_to_le64(size
);
1516 bms
->write_behind
= __cpu_to_le32(write_behind
);
1523 static void locate_bitmap1(struct supertype
*st
, int fd
)
1525 unsigned long long offset
;
1526 struct mdp_superblock_1
*sb
;
1530 if (st
->ss
->load_super(st
, fd
, NULL
))
1531 return; /* no error I hope... */
1536 offset
= __le64_to_cpu(sb
->super_offset
);
1537 offset
+= (int32_t) __le32_to_cpu(sb
->bitmap_offset
);
1540 lseek64(fd
, offset
<<9, 0);
1543 static int write_bitmap1(struct supertype
*st
, int fd
)
1545 struct mdp_superblock_1
*sb
= st
->sb
;
1546 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+1024);
1550 char *buf
= (char*)(((long)(abuf
+4096))&~4095UL);
1552 locate_bitmap1(st
, fd
);
1554 memset(buf
, 0xff, 4096);
1555 memcpy(buf
, ((char*)sb
)+1024, sizeof(bitmap_super_t
));
1557 towrite
= __le64_to_cpu(bms
->sync_size
) / (__le32_to_cpu(bms
->chunksize
)>>9);
1558 towrite
= (towrite
+7) >> 3; /* bits to bytes */
1559 towrite
+= sizeof(bitmap_super_t
);
1560 towrite
= ROUND_UP(towrite
, 512);
1561 while (towrite
> 0) {
1565 n
= write(fd
, buf
, n
);
1570 memset(buf
, 0xff, 4096);
1579 static void free_super1(struct supertype
*st
)
1587 static int validate_geometry1(struct supertype
*st
, int level
,
1588 int layout
, int raiddisks
,
1589 int chunk
, unsigned long long size
,
1590 char *subdev
, unsigned long long *freesize
,
1593 unsigned long long ldsize
;
1596 if (level
== LEVEL_CONTAINER
)
1601 fd
= open(subdev
, O_RDONLY
|O_EXCL
, 0);
1604 fprintf(stderr
, Name
": super1.x cannot open %s: %s\n",
1605 subdev
, strerror(errno
));
1609 if (!get_dev_size(fd
, subdev
, &ldsize
)) {
1615 *freesize
= avail_size1(st
, ldsize
>> 9);
1618 #endif /* MDASSEMBLE */
1620 struct superswitch super1
= {
1622 .examine_super
= examine_super1
,
1623 .brief_examine_super
= brief_examine_super1
,
1624 .export_examine_super
= export_examine_super1
,
1625 .detail_super
= detail_super1
,
1626 .brief_detail_super
= brief_detail_super1
,
1627 .export_detail_super
= export_detail_super1
,
1628 .write_init_super
= write_init_super1
,
1629 .validate_geometry
= validate_geometry1
,
1630 .add_to_super
= add_to_super1
,
1632 .match_home
= match_home1
,
1633 .uuid_from_super
= uuid_from_super1
,
1634 .getinfo_super
= getinfo_super1
,
1635 .update_super
= update_super1
,
1636 .init_super
= init_super1
,
1637 .store_super
= store_super1
,
1638 .compare_super
= compare_super1
,
1639 .load_super
= load_super1
,
1640 .match_metadata_desc
= match_metadata_desc1
,
1641 .avail_size
= avail_size1
,
1642 .add_internal_bitmap
= add_internal_bitmap1
,
1643 .locate_bitmap
= locate_bitmap1
,
1644 .write_bitmap
= write_bitmap1
,
1645 .free_super
= free_super1
,
1646 #if __BYTE_ORDER == BIG_ENDIAN