2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2016 Neil Brown <neilb@suse.com>
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>
28 * The version-1 superblock :
29 * All numeric fields are little-endian.
31 * total size: 256 bytes plus 2 per device.
32 * 1K allows 384 devices.
34 struct mdp_superblock_1
{
35 /* constant array information - 128 bytes */
36 __u32 magic
; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
37 __u32 major_version
; /* 1 */
38 __u32 feature_map
; /* 0 for now */
39 __u32 pad0
; /* always set to 0 when writing */
41 __u8 set_uuid
[16]; /* user-space generated. */
42 char set_name
[32]; /* set and interpreted by user-space */
44 __u64 ctime
; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
45 __u32 level
; /* -4 (multipath), -1 (linear), 0,1,4,5 */
46 __u32 layout
; /* used for raid5, raid6, raid10, and raid0 */
47 __u64 size
; /* used size of component devices, in 512byte sectors */
49 __u32 chunksize
; /* in 512byte sectors */
52 __u32 bitmap_offset
; /* sectors after start of superblock that bitmap starts
53 * NOTE: signed, so bitmap can be before superblock
54 * only meaningful of feature_map[0] is set.
57 /* only meaningful when feature_map[MD_FEATURE_PPL] is set */
59 __s16 offset
; /* sectors from start of superblock that ppl starts */
60 __u16 size
; /* ppl size in sectors */
64 /* These are only valid with feature bit '4' */
65 __u32 new_level
; /* new level we are reshaping to */
66 __u64 reshape_position
; /* next address in array-space for reshape */
67 __u32 delta_disks
; /* change in number of raid_disks */
68 __u32 new_layout
; /* new layout */
69 __u32 new_chunk
; /* new chunk size (sectors) */
70 __u32 new_offset
; /* signed number to add to data_offset in new
71 * layout. 0 == no-change. This can be
72 * different on each device in the array.
75 /* constant this-device information - 64 bytes */
76 __u64 data_offset
; /* sector start of data, often 0 */
77 __u64 data_size
; /* sectors in this device that can be used for data */
78 __u64 super_offset
; /* sector start of this superblock */
80 __u64 recovery_offset
;/* sectors before this offset (from data_offset) have been recovered */
81 __u64 journal_tail
;/* journal tail of journal device (from data_offset) */
83 __u32 dev_number
; /* permanent identifier of this device - not role in raid */
84 __u32 cnt_corrected_read
; /* number of read errors that were corrected by re-writing */
85 __u8 device_uuid
[16]; /* user-space setable, ignored by kernel */
86 __u8 devflags
; /* per-device flags. Only one defined...*/
87 #define WriteMostly1 1 /* mask for writemostly flag in above */
88 #define FailFast1 2 /* Device should get FailFast requests */
89 /* bad block log. If there are any bad blocks the feature flag is set.
90 * if offset and size are non-zero, that space is reserved and available.
92 __u8 bblog_shift
; /* shift from sectors to block size for badblock list */
93 __u16 bblog_size
; /* number of sectors reserved for badblock list */
94 __u32 bblog_offset
; /* sector offset from superblock to bblog, signed */
96 /* array state information - 64 bytes */
97 __u64 utime
; /* 40 bits second, 24 bits microseconds */
98 __u64 events
; /* incremented when superblock updated */
99 __u64 resync_offset
; /* data before this offset (from data_offset) known to be in sync */
100 __u32 sb_csum
; /* checksum upto dev_roles[max_dev] */
101 __u32 max_dev
; /* size of dev_roles[] array to consider */
102 __u8 pad3
[64-32]; /* set to 0 when writing */
104 /* device state information. Indexed by dev_number.
106 * Note there are no per-device state flags. State information is rolled
107 * into the 'roles' value. If a device is spare or faulty, then it doesn't
108 * have a meaningful role.
110 __u16 dev_roles
[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
113 #define MAX_SB_SIZE 4096
114 /* bitmap super size is 256, but we round up to a sector for alignment */
115 #define BM_SUPER_SIZE 512
116 #define MAX_DEVS ((int)(MAX_SB_SIZE - sizeof(struct mdp_superblock_1)) / 2)
117 #define SUPER1_SIZE (MAX_SB_SIZE + BM_SUPER_SIZE \
118 + sizeof(struct misc_dev_info))
120 struct misc_dev_info
{
124 #define MULTIPLE_PPL_AREA_SIZE_SUPER1 (1024 * 1024) /* Size of the whole
127 /* feature_map bits */
128 #define MD_FEATURE_BITMAP_OFFSET 1
129 #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
132 #define MD_FEATURE_RESHAPE_ACTIVE 4
133 #define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */
134 #define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an
135 * active device with same 'role'.
136 * 'recovery_offset' is also set.
138 #define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number
139 * of devices, but is going
142 #define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */
143 #define MD_FEATURE_BITMAP_VERSIONED 256 /* bitmap version number checked properly */
144 #define MD_FEATURE_JOURNAL 512 /* support write journal */
145 #define MD_FEATURE_PPL 1024 /* support PPL */
146 #define MD_FEATURE_MUTLIPLE_PPLS 2048 /* support for multiple PPLs */
147 #define MD_FEATURE_RAID0_LAYOUT 4096 /* layout is meaningful in RAID0 */
148 #define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \
149 |MD_FEATURE_RECOVERY_OFFSET \
150 |MD_FEATURE_RESHAPE_ACTIVE \
151 |MD_FEATURE_BAD_BLOCKS \
152 |MD_FEATURE_REPLACEMENT \
153 |MD_FEATURE_RESHAPE_BACKWARDS \
154 |MD_FEATURE_NEW_OFFSET \
155 |MD_FEATURE_BITMAP_VERSIONED \
156 |MD_FEATURE_JOURNAL \
158 |MD_FEATURE_MULTIPLE_PPLS \
159 |MD_FEATURE_RAID0_LAYOUT \
162 static int role_from_sb(struct mdp_superblock_1
*sb
)
167 d
= __le32_to_cpu(sb
->dev_number
);
168 if (d
< __le32_to_cpu(sb
->max_dev
))
169 role
= __le16_to_cpu(sb
->dev_roles
[d
]);
171 role
= MD_DISK_ROLE_SPARE
;
175 /* return how many bytes are needed for bitmap, for cluster-md each node
176 * should have it's own bitmap */
177 static unsigned int calc_bitmap_size(bitmap_super_t
*bms
, unsigned int boundary
)
179 unsigned long long bits
, bytes
;
181 bits
= bitmap_bits(__le64_to_cpu(bms
->sync_size
),
182 __le32_to_cpu(bms
->chunksize
));
183 bytes
= (bits
+7) >> 3;
184 bytes
+= sizeof(bitmap_super_t
);
185 bytes
= ROUND_UP(bytes
, boundary
);
190 static unsigned int calc_sb_1_csum(struct mdp_superblock_1
* sb
)
192 unsigned int disk_csum
, csum
;
193 unsigned long long newcsum
;
194 int size
= sizeof(*sb
) + __le32_to_cpu(sb
->max_dev
)*2;
195 unsigned int *isuper
= (unsigned int*)sb
;
197 /* make sure I can count... */
198 if (offsetof(struct mdp_superblock_1
,data_offset
) != 128 ||
199 offsetof(struct mdp_superblock_1
, utime
) != 192 ||
200 sizeof(struct mdp_superblock_1
) != 256) {
201 fprintf(stderr
, "WARNING - superblock isn't sized correctly\n");
204 disk_csum
= sb
->sb_csum
;
207 for (; size
>=4; size
-= 4 ) {
208 newcsum
+= __le32_to_cpu(*isuper
);
213 newcsum
+= __le16_to_cpu(*(unsigned short*) isuper
);
215 csum
= (newcsum
& 0xffffffff) + (newcsum
>> 32);
216 sb
->sb_csum
= disk_csum
;
217 return __cpu_to_le32(csum
);
221 * Information related to file descriptor used for aligned reads/writes.
222 * Cache the block size.
229 static void init_afd(struct align_fd
*afd
, int fd
)
232 if (!get_dev_sector_size(afd
->fd
, NULL
, (unsigned int *)&afd
->blk_sz
))
236 static char abuf
[4096+4096];
238 static int aread(struct align_fd
*afd
, void *buf
, int len
)
241 * On devices with a 4K sector size, we need to read
242 * the full sector and copy relevant bits into
251 if (!bsize
|| bsize
> 4096 || len
> 4096) {
253 fprintf(stderr
, "WARNING - aread() called with invalid block size\n");
256 b
= ROUND_UP_PTR((char *)abuf
, 4096);
258 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
260 n
= read(afd
->fd
, b
, iosize
);
263 lseek(afd
->fd
, len
- n
, 1);
270 static int awrite(struct align_fd
*afd
, void *buf
, int len
)
273 * On devices with a 4K sector size, we need to write
274 * the full sector. We pre-read if the sector is larger
276 * The address must be sector-aligned.
283 if (!bsize
|| bsize
> 4096 || len
> 4096) {
285 fprintf(stderr
, "WARNING - awrite() called with invalid block size\n");
288 b
= ROUND_UP_PTR((char *)abuf
, 4096);
290 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
294 n
= read(afd
->fd
, b
, iosize
);
297 lseek(afd
->fd
, -n
, 1);
301 n
= write(afd
->fd
, b
, iosize
);
304 lseek(afd
->fd
, len
- n
, 1);
308 static inline unsigned int md_feature_any_ppl_on(__u32 feature_map
)
310 return ((__cpu_to_le32(feature_map
) &
311 (MD_FEATURE_PPL
| MD_FEATURE_MUTLIPLE_PPLS
)));
314 static inline unsigned int choose_ppl_space(int chunk
)
316 return (PPL_HEADER_SIZE
>> 9) + (chunk
> 128*2 ? chunk
: 128*2);
319 static void examine_super1(struct supertype
*st
, char *homehost
)
321 struct mdp_superblock_1
*sb
= st
->sb
;
322 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+MAX_SB_SIZE
);
329 int l
= homehost
? strlen(homehost
) : 0;
331 unsigned long long sb_offset
;
334 printf(" Magic : %08x\n", __le32_to_cpu(sb
->magic
));
335 printf(" Version : 1");
336 sb_offset
= __le64_to_cpu(sb
->super_offset
);
339 else if (sb_offset
<= 8)
343 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb
->feature_map
));
344 printf(" Array UUID : ");
345 for (i
=0; i
<16; i
++) {
346 if ((i
&3)==0 && i
!= 0) printf(":");
347 printf("%02x", sb
->set_uuid
[i
]);
350 printf(" Name : %.32s", sb
->set_name
);
351 if (l
> 0 && l
< 32 &&
352 sb
->set_name
[l
] == ':' &&
353 strncmp(sb
->set_name
, homehost
, l
) == 0)
354 printf(" (local to host %s)", homehost
);
356 if (bms
->nodes
> 0 &&
357 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
))
358 printf(" Cluster Name : %-64s\n", bms
->cluster_name
);
359 atime
= __le64_to_cpu(sb
->ctime
) & 0xFFFFFFFFFFULL
;
360 printf(" Creation Time : %.24s\n", ctime(&atime
));
361 c
=map_num(pers
, __le32_to_cpu(sb
->level
));
362 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
363 printf(" Raid Devices : %d\n", __le32_to_cpu(sb
->raid_disks
));
365 printf(" Avail Dev Size : %llu sectors%s\n",
366 (unsigned long long)__le64_to_cpu(sb
->data_size
),
367 human_size(__le64_to_cpu(sb
->data_size
)<<9));
368 if (__le32_to_cpu(sb
->level
) > 0) {
369 int ddsks
= 0, ddsks_denom
= 1;
370 switch(__le32_to_cpu(sb
->level
)) {
371 case 1: ddsks
=1;break;
373 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
374 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
376 layout
= __le32_to_cpu(sb
->layout
);
377 ddsks
= __le32_to_cpu(sb
->raid_disks
);
378 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
381 long long asize
= __le64_to_cpu(sb
->size
);
382 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
383 printf(" Array Size : %llu KiB%s\n",
384 asize
>> 10, human_size(asize
));
386 if (sb
->size
!= sb
->data_size
)
387 printf(" Used Dev Size : %llu sectors%s\n",
388 (unsigned long long)__le64_to_cpu(sb
->size
),
389 human_size(__le64_to_cpu(sb
->size
)<<9));
392 printf(" Data Offset : %llu sectors\n",
393 (unsigned long long)__le64_to_cpu(sb
->data_offset
));
394 if (sb
->new_offset
&&
395 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
)) {
396 unsigned long long offset
= __le64_to_cpu(sb
->data_offset
);
397 offset
+= (signed)(int32_t)__le32_to_cpu(sb
->new_offset
);
398 printf(" New Offset : %llu sectors\n", offset
);
400 printf(" Super Offset : %llu sectors\n",
401 (unsigned long long)__le64_to_cpu(sb
->super_offset
));
402 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_RECOVERY_OFFSET
)
403 printf("Recovery Offset : %llu sectors\n",
404 (unsigned long long)__le64_to_cpu(sb
->recovery_offset
));
406 st
->ss
->getinfo_super(st
, &info
, NULL
);
407 if (info
.space_after
!= 1 &&
408 !(__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
))
409 printf(" Unused Space : before=%llu sectors, after=%llu sectors\n",
410 info
.space_before
, info
.space_after
);
412 printf(" State : %s\n",
413 (__le64_to_cpu(sb
->resync_offset
)+1)? "active":"clean");
414 printf(" Device UUID : ");
415 for (i
=0; i
<16; i
++) {
416 if ((i
&3)==0 && i
!= 0)
418 printf("%02x", sb
->device_uuid
[i
]);
422 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
423 printf("Internal Bitmap : %ld sectors from superblock\n",
424 (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
));
425 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
426 printf(" PPL : %u sectors at offset %d sectors from superblock\n",
427 __le16_to_cpu(sb
->ppl
.size
),
428 __le16_to_cpu(sb
->ppl
.offset
));
430 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)) {
431 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)
432 __le64_to_cpu(sb
->reshape_position
)/2,
433 human_size(__le64_to_cpu(sb
->reshape_position
)<<9));
434 if (__le32_to_cpu(sb
->delta_disks
)) {
435 printf(" Delta Devices : %d",
436 __le32_to_cpu(sb
->delta_disks
));
437 printf(" (%d->%d)\n",
438 __le32_to_cpu(sb
->raid_disks
) -
439 __le32_to_cpu(sb
->delta_disks
),
440 __le32_to_cpu(sb
->raid_disks
));
441 if ((int)__le32_to_cpu(sb
->delta_disks
) < 0)
442 delta_extra
= -__le32_to_cpu(sb
->delta_disks
);
444 if (__le32_to_cpu(sb
->new_level
) != __le32_to_cpu(sb
->level
)) {
445 c
= map_num(pers
, __le32_to_cpu(sb
->new_level
));
446 printf(" New Level : %s\n", c
?c
:"-unknown-");
448 if (__le32_to_cpu(sb
->new_layout
) !=
449 __le32_to_cpu(sb
->layout
)) {
450 if (__le32_to_cpu(sb
->level
) == 5) {
451 c
= map_num(r5layout
,
452 __le32_to_cpu(sb
->new_layout
));
453 printf(" New Layout : %s\n", c
?c
:"-unknown-");
455 if (__le32_to_cpu(sb
->level
) == 6) {
456 c
= map_num(r6layout
,
457 __le32_to_cpu(sb
->new_layout
));
458 printf(" New Layout : %s\n", c
?c
:"-unknown-");
460 if (__le32_to_cpu(sb
->level
) == 10) {
461 printf(" New Layout :");
462 print_r10_layout(__le32_to_cpu(sb
->new_layout
));
466 if (__le32_to_cpu(sb
->new_chunk
) !=
467 __le32_to_cpu(sb
->chunksize
))
468 printf(" New Chunksize : %dK\n",
469 __le32_to_cpu(sb
->new_chunk
)/2);
474 if (sb
->devflags
& WriteMostly1
)
475 printf(" write-mostly");
476 if (sb
->devflags
& FailFast1
)
481 atime
= __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
;
482 printf(" Update Time : %.24s\n", ctime(&atime
));
484 if (sb
->bblog_size
&& sb
->bblog_offset
) {
485 printf(" Bad Block Log : %d entries available at offset %ld sectors",
486 __le16_to_cpu(sb
->bblog_size
)*512/8,
487 (long)(int32_t)__le32_to_cpu(sb
->bblog_offset
));
488 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
489 printf(" - bad blocks present.");
493 if (calc_sb_1_csum(sb
) == sb
->sb_csum
)
494 printf(" Checksum : %x - correct\n",
495 __le32_to_cpu(sb
->sb_csum
));
497 printf(" Checksum : %x - expected %x\n",
498 __le32_to_cpu(sb
->sb_csum
),
499 __le32_to_cpu(calc_sb_1_csum(sb
)));
500 printf(" Events : %llu\n",
501 (unsigned long long)__le64_to_cpu(sb
->events
));
503 if (__le32_to_cpu(sb
->level
) == 0 &&
504 (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT
))) {
505 c
= map_num(r0layout
, __le32_to_cpu(sb
->layout
));
506 printf(" Layout : %s\n", c
?c
:"-unknown-");
508 if (__le32_to_cpu(sb
->level
) == 5) {
509 c
= map_num(r5layout
, __le32_to_cpu(sb
->layout
));
510 printf(" Layout : %s\n", c
?c
:"-unknown-");
512 if (__le32_to_cpu(sb
->level
) == 6) {
513 c
= map_num(r6layout
, __le32_to_cpu(sb
->layout
));
514 printf(" Layout : %s\n", c
?c
:"-unknown-");
516 if (__le32_to_cpu(sb
->level
) == 10) {
517 int lo
= __le32_to_cpu(sb
->layout
);
519 print_r10_layout(lo
);
522 switch(__le32_to_cpu(sb
->level
)) {
528 printf(" Chunk Size : %dK\n",
529 __le32_to_cpu(sb
->chunksize
)/2);
532 printf(" Rounding : %dK\n",
533 __le32_to_cpu(sb
->chunksize
)/2);
540 /* This turns out to just be confusing */
541 printf(" Array Slot : %d (", __le32_to_cpu(sb
->dev_number
));
542 for (i
= __le32_to_cpu(sb
->max_dev
); i
> 0 ; i
--)
543 if (__le16_to_cpu(sb
->dev_roles
[i
-1]) != MD_DISK_ROLE_SPARE
)
545 for (d
= 0; d
< i
; d
++) {
546 int role
= __le16_to_cpu(sb
->dev_roles
[d
]);
549 if (role
== MD_DISK_ROLE_SPARE
)
552 if(role
== MD_DISK_ROLE_FAULTY
)
559 printf(" Device Role : ");
560 role
= role_from_sb(sb
);
561 if (role
>= MD_DISK_ROLE_FAULTY
)
563 else if (role
== MD_DISK_ROLE_JOURNAL
)
565 else if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_REPLACEMENT
))
566 printf("Replacement device %d\n", role
);
568 printf("Active device %d\n", role
);
570 printf(" Array State : ");
571 for (d
= 0; d
< __le32_to_cpu(sb
->raid_disks
) + delta_extra
; d
++) {
574 for (i
= 0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
575 unsigned int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
589 /* This is confusing too */
591 for (i
= 0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
592 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
593 if (role
== MD_DISK_ROLE_FAULTY
)
597 printf(" %d failed", faulty
);
599 printf(" ('A' == active, '.' == missing, 'R' == replacing)");
603 static void brief_examine_super1(struct supertype
*st
, int verbose
)
605 struct mdp_superblock_1
*sb
= st
->sb
;
607 unsigned long long sb_offset
;
609 char *c
= map_num(pers
, __le32_to_cpu(sb
->level
));
611 nm
= strchr(sb
->set_name
, ':');
614 else if (sb
->set_name
[0])
626 printf(" level=%s", c
);
627 sb_offset
= __le64_to_cpu(sb
->super_offset
);
629 printf(" metadata=1.1 ");
630 else if (sb_offset
<= 8)
631 printf(" metadata=1.2 ");
633 printf(" metadata=1.0 ");
635 printf("num-devices=%d ", __le32_to_cpu(sb
->raid_disks
));
637 for (i
= 0; i
< 16; i
++) {
638 if ((i
&3)==0 && i
!= 0)
640 printf("%02x", sb
->set_uuid
[i
]);
642 if (sb
->set_name
[0]) {
644 print_quoted(sb
->set_name
);
649 static void export_examine_super1(struct supertype
*st
)
651 struct mdp_superblock_1
*sb
= st
->sb
;
656 printf("MD_LEVEL=%s\n", map_num(pers
, __le32_to_cpu(sb
->level
)));
657 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb
->raid_disks
));
658 for (i
= 0; i
< 32; i
++)
659 if (sb
->set_name
[i
] == '\n' || sb
->set_name
[i
] == '\0') {
664 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
665 if (__le32_to_cpu(sb
->level
) > 0) {
666 int ddsks
= 0, ddsks_denom
= 1;
667 switch(__le32_to_cpu(sb
->level
)) {
673 ddsks
= __le32_to_cpu(sb
->raid_disks
)-1;
676 ddsks
= __le32_to_cpu(sb
->raid_disks
)-2;
679 layout
= __le32_to_cpu(sb
->layout
);
680 ddsks
= __le32_to_cpu(sb
->raid_disks
);
681 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
684 long long asize
= __le64_to_cpu(sb
->size
);
685 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
686 printf("MD_ARRAY_SIZE=%s\n",
687 human_size_brief(asize
, JEDEC
));
691 for (i
= 0; i
< 16; i
++) {
692 if ((i
&3) == 0 && i
!= 0)
694 printf("%02x", sb
->set_uuid
[i
]);
697 printf("MD_UPDATE_TIME=%llu\n",
698 __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
);
699 printf("MD_DEV_UUID=");
700 for (i
= 0; i
< 16; i
++) {
701 if ((i
&3) == 0 && i
!= 0)
703 printf("%02x", sb
->device_uuid
[i
]);
706 printf("MD_EVENTS=%llu\n",
707 (unsigned long long)__le64_to_cpu(sb
->events
));
710 static int copy_metadata1(struct supertype
*st
, int from
, int to
)
712 /* Read superblock. If it looks good, write it out.
713 * Then if a bitmap is present, copy that.
714 * And if a bad-block-list is present, copy that too.
717 unsigned long long dsize
, sb_offset
;
718 const int bufsize
= 4*1024;
719 struct mdp_superblock_1 super
, *sb
;
721 if (posix_memalign(&buf
, 4096, bufsize
) != 0)
724 if (!get_dev_size(from
, NULL
, &dsize
))
730 switch(st
->minor_version
) {
734 sb_offset
&= ~(4*2-1);
746 if (lseek64(from
, sb_offset
<< 9, 0) < 0LL)
748 if (read(from
, buf
, bufsize
) != bufsize
)
752 super
= *sb
; // save most of sb for when we reuse buf
754 if (__le32_to_cpu(super
.magic
) != MD_SB_MAGIC
||
755 __le32_to_cpu(super
.major_version
) != 1 ||
756 __le64_to_cpu(super
.super_offset
) != sb_offset
||
757 calc_sb_1_csum(sb
) != super
.sb_csum
)
760 if (lseek64(to
, sb_offset
<< 9, 0) < 0LL)
762 if (write(to
, buf
, bufsize
) != bufsize
)
765 if (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
766 unsigned long long bitmap_offset
= sb_offset
;
767 int bytes
= 4096; // just an estimate.
769 struct align_fd afrom
, ato
;
771 init_afd(&afrom
, from
);
774 bitmap_offset
+= (int32_t)__le32_to_cpu(super
.bitmap_offset
);
776 if (lseek64(from
, bitmap_offset
<<9, 0) < 0)
778 if (lseek64(to
, bitmap_offset
<<9, 0) < 0)
781 for (written
= 0; written
< bytes
; ) {
782 int n
= bytes
- written
;
785 if (aread(&afrom
, buf
, n
) != n
)
788 /* have the header, can calculate
789 * correct bitmap bytes */
792 bytes
= calc_bitmap_size(bms
, 512);
796 if (awrite(&ato
, buf
, n
) != n
)
802 if (super
.bblog_size
!= 0 &&
803 __le16_to_cpu(super
.bblog_size
) <= 100 &&
804 super
.bblog_offset
!= 0 &&
805 (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BAD_BLOCKS
))) {
806 /* There is a bad block log */
807 unsigned long long bb_offset
= sb_offset
;
808 int bytes
= __le16_to_cpu(super
.bblog_size
) * 512;
810 struct align_fd afrom
, ato
;
812 init_afd(&afrom
, from
);
815 bb_offset
+= (int32_t)__le32_to_cpu(super
.bblog_offset
);
817 if (lseek64(from
, bb_offset
<<9, 0) < 0)
819 if (lseek64(to
, bb_offset
<<9, 0) < 0)
822 for (written
= 0; written
< bytes
; ) {
823 int n
= bytes
- written
;
826 if (aread(&afrom
, buf
, n
) != n
)
829 if (awrite(&ato
, buf
, n
) != n
)
843 static void detail_super1(struct supertype
*st
, char *homehost
, char *subarray
)
845 struct mdp_superblock_1
*sb
= st
->sb
;
846 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
848 int l
= homehost
? strlen(homehost
) : 0;
850 printf(" Name : %.32s", sb
->set_name
);
851 if (l
> 0 && l
< 32 && sb
->set_name
[l
] == ':' &&
852 strncmp(sb
->set_name
, homehost
, l
) == 0)
853 printf(" (local to host %s)", homehost
);
854 if (bms
->nodes
> 0 &&
855 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
))
856 printf("\n Cluster Name : %-64s", bms
->cluster_name
);
857 printf("\n UUID : ");
858 for (i
= 0; i
< 16; i
++) {
859 if ((i
&3) == 0 && i
!= 0)
861 printf("%02x", sb
->set_uuid
[i
]);
863 printf("\n Events : %llu\n\n",
864 (unsigned long long)__le64_to_cpu(sb
->events
));
867 static void brief_detail_super1(struct supertype
*st
, char *subarray
)
869 struct mdp_superblock_1
*sb
= st
->sb
;
872 if (sb
->set_name
[0]) {
874 print_quoted(sb
->set_name
);
877 for (i
= 0; i
< 16; i
++) {
878 if ((i
& 3) == 0 && i
!= 0)
880 printf("%02x", sb
->set_uuid
[i
]);
884 static void export_detail_super1(struct supertype
*st
)
886 struct mdp_superblock_1
*sb
= st
->sb
;
890 for (i
= 0; i
< 32; i
++)
891 if (sb
->set_name
[i
] == '\n' || sb
->set_name
[i
] == '\0') {
896 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
899 static int examine_badblocks_super1(struct supertype
*st
, int fd
, char *devname
)
901 struct mdp_superblock_1
*sb
= st
->sb
;
902 unsigned long long offset
;
907 if (!sb
->bblog_size
|| __le16_to_cpu(sb
->bblog_size
) > 100 ||
909 printf("No bad-blocks list configured on %s\n", devname
);
912 if ((sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
)) == 0) {
913 printf("Bad-blocks list is empty in %s\n", devname
);
917 size
= __le16_to_cpu(sb
->bblog_size
)* 512;
918 if (posix_memalign((void**)&bbl
, 4096, size
) != 0) {
919 pr_err("could not allocate badblocks list\n");
922 offset
= __le64_to_cpu(sb
->super_offset
) +
923 (int)__le32_to_cpu(sb
->bblog_offset
);
925 if (lseek64(fd
, offset
, 0) < 0) {
926 pr_err("Cannot seek to bad-blocks list\n");
929 if (read(fd
, bbl
, size
) != size
) {
930 pr_err("Cannot read bad-blocks list\n");
933 /* 64bits per entry. 10 bits is block-count, 54 bits is block
934 * offset. Blocks are sectors unless bblog->shift makes them bigger
937 printf("Bad-blocks on %s:\n", devname
);
938 for (i
= 0; i
< size
/8; i
++, bbp
++) {
939 __u64 bb
= __le64_to_cpu(*bbp
);
940 int count
= bb
& 0x3ff;
941 unsigned long long sector
= bb
>> 10;
946 sector
<<= sb
->bblog_shift
;
947 count
<<= sb
->bblog_shift
;
949 printf("%20llu for %d sectors\n", sector
, count
);
954 static int match_home1(struct supertype
*st
, char *homehost
)
956 struct mdp_superblock_1
*sb
= st
->sb
;
957 int l
= homehost
? strlen(homehost
) : 0;
959 return (l
> 0 && l
< 32 && sb
->set_name
[l
] == ':' &&
960 strncmp(sb
->set_name
, homehost
, l
) == 0);
963 static void uuid_from_super1(struct supertype
*st
, int uuid
[4])
965 struct mdp_superblock_1
*super
= st
->sb
;
966 char *cuuid
= (char*)uuid
;
968 for (i
= 0; i
< 16; i
++)
969 cuuid
[i
] = super
->set_uuid
[i
];
972 static void getinfo_super1(struct supertype
*st
, struct mdinfo
*info
, char *map
)
974 struct mdp_superblock_1
*sb
= st
->sb
;
975 struct bitmap_super_s
*bsb
= (void*)(((char*)sb
)+MAX_SB_SIZE
);
976 struct misc_dev_info
*misc
=
977 (void*)(((char*)sb
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
981 unsigned int map_disks
= info
->array
.raid_disks
;
982 unsigned long long super_offset
;
983 unsigned long long data_size
;
985 memset(info
, 0, sizeof(*info
));
986 info
->array
.major_version
= 1;
987 info
->array
.minor_version
= st
->minor_version
;
988 info
->array
.patch_version
= 0;
989 info
->array
.raid_disks
= __le32_to_cpu(sb
->raid_disks
);
990 info
->array
.level
= __le32_to_cpu(sb
->level
);
991 info
->array
.layout
= __le32_to_cpu(sb
->layout
);
992 info
->array
.md_minor
= -1;
993 info
->array
.ctime
= __le64_to_cpu(sb
->ctime
);
994 info
->array
.utime
= __le64_to_cpu(sb
->utime
);
995 info
->array
.chunk_size
= __le32_to_cpu(sb
->chunksize
)*512;
997 (__le64_to_cpu(sb
->resync_offset
) == MaxSector
) ? 1 : 0;
999 super_offset
= __le64_to_cpu(sb
->super_offset
);
1000 info
->data_offset
= __le64_to_cpu(sb
->data_offset
);
1001 info
->component_size
= __le64_to_cpu(sb
->size
);
1002 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
1003 info
->bitmap_offset
= (int32_t)__le32_to_cpu(sb
->bitmap_offset
);
1004 if (__le32_to_cpu(bsb
->nodes
) > 1)
1005 info
->array
.state
|= (1 << MD_SB_CLUSTERED
);
1006 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
1007 info
->ppl_offset
= __le16_to_cpu(sb
->ppl
.offset
);
1008 info
->ppl_size
= __le16_to_cpu(sb
->ppl
.size
);
1009 info
->ppl_sector
= super_offset
+ info
->ppl_offset
;
1012 info
->disk
.major
= 0;
1013 info
->disk
.minor
= 0;
1014 info
->disk
.number
= __le32_to_cpu(sb
->dev_number
);
1015 if (__le32_to_cpu(sb
->dev_number
) >= __le32_to_cpu(sb
->max_dev
) ||
1016 __le32_to_cpu(sb
->dev_number
) >= MAX_DEVS
)
1017 role
= MD_DISK_ROLE_FAULTY
;
1019 role
= __le16_to_cpu(sb
->dev_roles
[__le32_to_cpu(sb
->dev_number
)]);
1021 if (info
->array
.level
<= 0)
1022 data_size
= __le64_to_cpu(sb
->data_size
);
1024 data_size
= __le64_to_cpu(sb
->size
);
1025 if (info
->data_offset
< super_offset
) {
1026 unsigned long long end
;
1027 info
->space_before
= info
->data_offset
;
1030 if (sb
->bblog_offset
&& sb
->bblog_size
) {
1031 unsigned long long bboffset
= super_offset
;
1032 bboffset
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
1037 if (super_offset
+ info
->bitmap_offset
+ info
->ppl_offset
< end
)
1038 end
= super_offset
+ info
->bitmap_offset
+
1041 if (info
->data_offset
+ data_size
< end
)
1042 info
->space_after
= end
- data_size
- info
->data_offset
;
1044 info
->space_after
= 0;
1046 unsigned long long earliest
;
1047 earliest
= super_offset
+ (32+4)*2; /* match kernel */
1048 if (info
->bitmap_offset
> 0) {
1049 unsigned long long bmend
= info
->bitmap_offset
;
1050 unsigned long long size
= calc_bitmap_size(bsb
, 4096);
1053 if (bmend
> earliest
)
1055 } else if (info
->ppl_offset
> 0) {
1056 unsigned long long pplend
;
1058 pplend
= info
->ppl_offset
+ info
->ppl_size
;
1059 if (pplend
> earliest
)
1062 if (sb
->bblog_offset
&& sb
->bblog_size
) {
1063 unsigned long long bbend
= super_offset
;
1064 bbend
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
1065 bbend
+= __le16_to_cpu(sb
->bblog_size
);
1066 if (bbend
> earliest
)
1069 if (earliest
< info
->data_offset
)
1070 info
->space_before
= info
->data_offset
- earliest
;
1072 info
->space_before
= 0;
1073 info
->space_after
= misc
->device_size
- data_size
-
1076 if (info
->space_before
== 0 && info
->space_after
== 0) {
1077 /* It will look like we don't support data_offset changes,
1078 * be we do - it's just that there is no room.
1079 * A change that reduced the number of devices should
1080 * still be allowed, so set the otherwise useless value of '1'
1082 info
->space_after
= 1;
1085 info
->disk
.raid_disk
= -1;
1087 case MD_DISK_ROLE_SPARE
:
1088 /* spare: not active, not sync, not faulty */
1089 info
->disk
.state
= 0;
1091 case MD_DISK_ROLE_FAULTY
:
1092 info
->disk
.state
= (1 << MD_DISK_FAULTY
); /* faulty */
1094 case MD_DISK_ROLE_JOURNAL
:
1095 info
->disk
.state
= (1 << MD_DISK_JOURNAL
);
1096 info
->disk
.raid_disk
= role
;
1097 /* journal uses all 4kB blocks*/
1098 info
->space_after
= (misc
->device_size
- info
->data_offset
) % 8;
1101 info
->disk
.state
= 6; /* active and in sync */
1102 info
->disk
.raid_disk
= role
;
1104 if (sb
->devflags
& WriteMostly1
)
1105 info
->disk
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
1106 if (sb
->devflags
& FailFast1
)
1107 info
->disk
.state
|= (1 << MD_DISK_FAILFAST
);
1108 info
->events
= __le64_to_cpu(sb
->events
);
1109 sprintf(info
->text_version
, "1.%d", st
->minor_version
);
1110 info
->safe_mode_delay
= 200;
1112 memcpy(info
->uuid
, sb
->set_uuid
, 16);
1114 strncpy(info
->name
, sb
->set_name
, 32);
1117 if ((__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_REPLACEMENT
)) {
1118 info
->disk
.state
&= ~(1 << MD_DISK_SYNC
);
1119 info
->disk
.state
|= 1 << MD_DISK_REPLACEMENT
;
1122 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET
))
1123 info
->recovery_start
= __le32_to_cpu(sb
->recovery_offset
);
1125 info
->recovery_start
= MaxSector
;
1127 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
1128 info
->reshape_active
= 1;
1129 if ((sb
->feature_map
& __le32_to_cpu(MD_FEATURE_NEW_OFFSET
)) &&
1130 sb
->new_offset
!= 0)
1131 info
->reshape_active
|= RESHAPE_NO_BACKUP
;
1132 info
->reshape_progress
= __le64_to_cpu(sb
->reshape_position
);
1133 info
->new_level
= __le32_to_cpu(sb
->new_level
);
1134 info
->delta_disks
= __le32_to_cpu(sb
->delta_disks
);
1135 info
->new_layout
= __le32_to_cpu(sb
->new_layout
);
1136 info
->new_chunk
= __le32_to_cpu(sb
->new_chunk
)<<9;
1137 if (info
->delta_disks
< 0)
1138 info
->array
.raid_disks
-= info
->delta_disks
;
1140 info
->reshape_active
= 0;
1142 info
->recovery_blocked
= info
->reshape_active
;
1145 for (i
=0; i
<map_disks
; i
++)
1147 for (i
= 0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
1148 role
= __le16_to_cpu(sb
->dev_roles
[i
]);
1149 if (/*role == MD_DISK_ROLE_SPARE || */role
< (unsigned) info
->array
.raid_disks
) {
1151 if (map
&& role
< map_disks
)
1156 info
->array
.working_disks
= working
;
1158 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_JOURNAL
)) {
1159 info
->journal_device_required
= 1;
1160 info
->consistency_policy
= CONSISTENCY_POLICY_JOURNAL
;
1161 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
1162 info
->consistency_policy
= CONSISTENCY_POLICY_PPL
;
1163 } else if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
1164 info
->consistency_policy
= CONSISTENCY_POLICY_BITMAP
;
1165 } else if (info
->array
.level
<= 0) {
1166 info
->consistency_policy
= CONSISTENCY_POLICY_NONE
;
1168 info
->consistency_policy
= CONSISTENCY_POLICY_RESYNC
;
1171 info
->journal_clean
= 0;
1174 static struct mdinfo
*container_content1(struct supertype
*st
, char *subarray
)
1176 struct mdinfo
*info
;
1181 info
= xmalloc(sizeof(*info
));
1182 getinfo_super1(st
, info
, NULL
);
1186 static int update_super1(struct supertype
*st
, struct mdinfo
*info
,
1187 char *update
, char *devname
, int verbose
,
1188 int uuid_set
, char *homehost
)
1190 /* NOTE: for 'assemble' and 'force' we need to return non-zero
1191 * if any change was made. For others, the return value is
1195 struct mdp_superblock_1
*sb
= st
->sb
;
1196 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
1198 if (strcmp(update
, "homehost") == 0 &&
1200 /* Note that 'homehost' is special as it is really
1205 c
= strchr(sb
->set_name
, ':');
1207 strncpy(info
->name
, c
+1, 31 - (c
-sb
->set_name
));
1209 strncpy(info
->name
, sb
->set_name
, 32);
1213 if (strcmp(update
, "force-one")==0) {
1214 /* Not enough devices for a working array,
1215 * so bring this one up-to-date
1217 if (sb
->events
!= __cpu_to_le64(info
->events
))
1219 sb
->events
= __cpu_to_le64(info
->events
);
1220 } else if (strcmp(update
, "force-array")==0) {
1221 /* Degraded array and 'force' requests to
1222 * maybe need to mark it 'clean'.
1224 switch(__le32_to_cpu(sb
->level
)) {
1228 /* need to force clean */
1229 if (sb
->resync_offset
!= MaxSector
)
1231 sb
->resync_offset
= MaxSector
;
1233 } else if (strcmp(update
, "assemble")==0) {
1234 int d
= info
->disk
.number
;
1236 if (info
->disk
.state
& (1<<MD_DISK_ACTIVE
))
1237 want
= info
->disk
.raid_disk
;
1238 else if (info
->disk
.state
& (1<<MD_DISK_JOURNAL
))
1239 want
= MD_DISK_ROLE_JOURNAL
;
1241 want
= MD_DISK_ROLE_SPARE
;
1242 if (sb
->dev_roles
[d
] != __cpu_to_le16(want
)) {
1243 sb
->dev_roles
[d
] = __cpu_to_le16(want
);
1246 if (info
->reshape_active
&&
1248 __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1249 info
->delta_disks
>= 0 &&
1250 info
->reshape_progress
<
1251 __le64_to_cpu(sb
->reshape_position
)) {
1252 sb
->reshape_position
=
1253 __cpu_to_le64(info
->reshape_progress
);
1256 if (info
->reshape_active
&&
1258 __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1259 info
->delta_disks
< 0 &&
1260 info
->reshape_progress
>
1261 __le64_to_cpu(sb
->reshape_position
)) {
1262 sb
->reshape_position
=
1263 __cpu_to_le64(info
->reshape_progress
);
1266 } else if (strcmp(update
, "linear-grow-new") == 0) {
1269 unsigned int max
= __le32_to_cpu(sb
->max_dev
);
1271 for (i
= 0; i
< max
; i
++)
1272 if (__le16_to_cpu(sb
->dev_roles
[i
]) >=
1273 MD_DISK_ROLE_FAULTY
)
1275 sb
->dev_number
= __cpu_to_le32(i
);
1276 info
->disk
.number
= i
;
1278 sb
->max_dev
= __cpu_to_le32(max
+1);
1281 random_uuid(sb
->device_uuid
);
1283 sb
->dev_roles
[i
] = __cpu_to_le16(info
->disk
.raid_disk
);
1285 fd
= open(devname
, O_RDONLY
);
1287 unsigned long long ds
;
1288 get_dev_size(fd
, devname
, &ds
);
1291 if (__le64_to_cpu(sb
->super_offset
) <
1292 __le64_to_cpu(sb
->data_offset
)) {
1293 sb
->data_size
= __cpu_to_le64(
1294 ds
- __le64_to_cpu(sb
->data_offset
));
1297 ds
&= ~(unsigned long long)(4*2-1);
1298 sb
->super_offset
= __cpu_to_le64(ds
);
1299 sb
->data_size
= __cpu_to_le64(
1300 ds
- __le64_to_cpu(sb
->data_offset
));
1303 } else if (strcmp(update
, "linear-grow-update") == 0) {
1304 int max
= __le32_to_cpu(sb
->max_dev
);
1305 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
1306 if (info
->array
.raid_disks
> max
) {
1307 sb
->max_dev
= __cpu_to_le32(max
+1);
1309 sb
->dev_roles
[info
->disk
.number
] =
1310 __cpu_to_le16(info
->disk
.raid_disk
);
1311 } else if (strcmp(update
, "resync") == 0) {
1312 /* make sure resync happens */
1313 sb
->resync_offset
= 0ULL;
1314 } else if (strcmp(update
, "uuid") == 0) {
1315 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
1317 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
)
1318 memcpy(bms
->uuid
, sb
->set_uuid
, 16);
1319 } else if (strcmp(update
, "no-bitmap") == 0) {
1320 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
);
1321 } else if (strcmp(update
, "bbl") == 0) {
1322 /* only possible if there is room after the bitmap, or if
1323 * there is no bitmap
1325 unsigned long long sb_offset
= __le64_to_cpu(sb
->super_offset
);
1326 unsigned long long data_offset
= __le64_to_cpu(sb
->data_offset
);
1327 long bitmap_offset
= 0;
1328 long bm_sectors
= 0;
1331 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1332 bitmap_offset
= (long)__le32_to_cpu(sb
->bitmap_offset
);
1333 bm_sectors
= calc_bitmap_size(bms
, 4096) >> 9;
1334 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
1335 bitmap_offset
= (long)__le16_to_cpu(sb
->ppl
.offset
);
1336 bm_sectors
= (long)__le16_to_cpu(sb
->ppl
.size
);
1339 if (sb_offset
< data_offset
) {
1341 * 1.1 or 1.2. Put bbl after bitmap leaving
1345 bb_offset
= sb_offset
+ 8;
1346 if (bm_sectors
&& bitmap_offset
> 0)
1347 bb_offset
= bitmap_offset
+ bm_sectors
;
1348 while (bb_offset
< (long)sb_offset
+ 8 + 32*2 &&
1349 bb_offset
+ 8+8 <= (long)data_offset
)
1350 /* too close to bitmap, and room to grow */
1352 if (bb_offset
+ 8 <= (long)data_offset
) {
1353 sb
->bblog_size
= __cpu_to_le16(8);
1354 sb
->bblog_offset
= __cpu_to_le32(bb_offset
);
1357 /* 1.0 - Put bbl just before super block */
1358 if (bm_sectors
&& bitmap_offset
< 0)
1359 space
= -bitmap_offset
- bm_sectors
;
1361 space
= sb_offset
- data_offset
-
1362 __le64_to_cpu(sb
->data_size
);
1364 sb
->bblog_size
= __cpu_to_le16(8);
1365 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1368 } else if (strcmp(update
, "no-bbl") == 0) {
1369 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
1370 pr_err("Cannot remove active bbl from %s\n",devname
);
1373 sb
->bblog_shift
= 0;
1374 sb
->bblog_offset
= 0;
1376 } else if (strcmp(update
, "force-no-bbl") == 0) {
1377 sb
->feature_map
&= ~ __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
);
1379 sb
->bblog_shift
= 0;
1380 sb
->bblog_offset
= 0;
1381 } else if (strcmp(update
, "ppl") == 0) {
1382 unsigned long long sb_offset
= __le64_to_cpu(sb
->super_offset
);
1383 unsigned long long data_offset
= __le64_to_cpu(sb
->data_offset
);
1384 unsigned long long data_size
= __le64_to_cpu(sb
->data_size
);
1385 long bb_offset
= __le32_to_cpu(sb
->bblog_offset
);
1389 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1390 pr_err("Cannot add PPL to array with bitmap\n");
1394 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_JOURNAL
)) {
1395 pr_err("Cannot add PPL to array with journal\n");
1399 if (sb_offset
< data_offset
) {
1401 space
= bb_offset
- 8;
1403 space
= data_offset
- sb_offset
- 8;
1406 offset
= -(sb_offset
- data_offset
- data_size
);
1407 if (offset
< INT16_MIN
)
1409 space
= -(offset
- bb_offset
);
1412 if (space
< (PPL_HEADER_SIZE
>> 9) + 8) {
1413 pr_err("Not enough space to add ppl\n");
1417 if (space
>= (MULTIPLE_PPL_AREA_SIZE_SUPER1
>> 9)) {
1418 space
= (MULTIPLE_PPL_AREA_SIZE_SUPER1
>> 9);
1420 int optimal_space
= choose_ppl_space(
1421 __le32_to_cpu(sb
->chunksize
));
1422 if (space
> optimal_space
)
1423 space
= optimal_space
;
1424 if (space
> UINT16_MAX
)
1428 sb
->ppl
.offset
= __cpu_to_le16(offset
);
1429 sb
->ppl
.size
= __cpu_to_le16(space
);
1430 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_PPL
);
1431 } else if (strcmp(update
, "no-ppl") == 0) {
1432 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_PPL
|
1433 MD_FEATURE_MUTLIPLE_PPLS
);
1434 } else if (strcmp(update
, "name") == 0) {
1435 if (info
->name
[0] == 0)
1436 sprintf(info
->name
, "%d", info
->array
.md_minor
);
1437 memset(sb
->set_name
, 0, sizeof(sb
->set_name
));
1439 strchr(info
->name
, ':') == NULL
&&
1440 strlen(homehost
)+1+strlen(info
->name
) < 32) {
1441 strcpy(sb
->set_name
, homehost
);
1442 strcat(sb
->set_name
, ":");
1443 strcat(sb
->set_name
, info
->name
);
1447 namelen
= min((int)strlen(info
->name
),
1448 (int)sizeof(sb
->set_name
) - 1);
1449 memcpy(sb
->set_name
, info
->name
, namelen
);
1450 memset(&sb
->set_name
[namelen
], '\0',
1451 sizeof(sb
->set_name
) - namelen
);
1453 } else if (strcmp(update
, "devicesize") == 0 &&
1454 __le64_to_cpu(sb
->super_offset
) <
1455 __le64_to_cpu(sb
->data_offset
)) {
1456 /* set data_size to device size less data_offset */
1457 struct misc_dev_info
*misc
= (struct misc_dev_info
*)
1458 (st
->sb
+ MAX_SB_SIZE
+ BM_SUPER_SIZE
);
1459 sb
->data_size
= __cpu_to_le64(
1460 misc
->device_size
- __le64_to_cpu(sb
->data_offset
));
1461 } else if (strncmp(update
, "revert-reshape", 14) == 0) {
1463 if (!(sb
->feature_map
&
1464 __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)))
1465 pr_err("No active reshape to revert on %s\n",
1469 unsigned long long reshape_sectors
;
1472 /* If the reshape hasn't started, just stop it.
1473 * It is conceivable that a stripe was modified but
1474 * the metadata not updated. In that case the backup
1475 * should have been used to get passed the critical stage.
1476 * If that couldn't happen, the "-nobackup" version
1479 if (strcmp(update
, "revert-reshape-nobackup") == 0 &&
1480 sb
->reshape_position
== 0 &&
1481 (__le32_to_cpu(sb
->delta_disks
) > 0 ||
1482 (__le32_to_cpu(sb
->delta_disks
) == 0 &&
1483 !(sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS
))))) {
1484 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
);
1485 sb
->raid_disks
= __cpu_to_le32(__le32_to_cpu(sb
->raid_disks
) -
1486 __le32_to_cpu(sb
->delta_disks
));
1487 sb
->delta_disks
= 0;
1490 /* reshape_position is a little messy.
1491 * Its value must be a multiple of the larger
1492 * chunk size, and of the "after" data disks.
1493 * So when reverting we need to change it to
1494 * be a multiple of the new "after" data disks,
1495 * which is the old "before".
1496 * If it isn't already a multiple of 'before',
1497 * the only thing we could do would be
1498 * copy some block around on the disks, which
1499 * is easy to get wrong.
1500 * So we reject a revert-reshape unless the
1501 * alignment is good.
1503 if (__le32_to_cpu(sb
->level
) >= 4 &&
1504 __le32_to_cpu(sb
->level
) <= 6) {
1506 __le64_to_cpu(sb
->reshape_position
);
1507 reshape_chunk
= __le32_to_cpu(sb
->new_chunk
);
1508 reshape_chunk
*= __le32_to_cpu(sb
->raid_disks
) -
1509 __le32_to_cpu(sb
->delta_disks
) -
1510 (__le32_to_cpu(sb
->level
)==6 ? 2 : 1);
1511 if (reshape_sectors
% reshape_chunk
) {
1512 pr_err("Reshape position is not suitably aligned.\n");
1513 pr_err("Try normal assembly and stop again\n");
1518 __cpu_to_le32(__le32_to_cpu(sb
->raid_disks
) -
1519 __le32_to_cpu(sb
->delta_disks
));
1520 if (sb
->delta_disks
== 0)
1521 sb
->feature_map
^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS
);
1523 sb
->delta_disks
= __cpu_to_le32(-__le32_to_cpu(sb
->delta_disks
));
1525 temp
= sb
->new_layout
;
1526 sb
->new_layout
= sb
->layout
;
1529 temp
= sb
->new_chunk
;
1530 sb
->new_chunk
= sb
->chunksize
;
1531 sb
->chunksize
= temp
;
1533 if (sb
->feature_map
&
1534 __cpu_to_le32(MD_FEATURE_NEW_OFFSET
)) {
1536 (int32_t)__le32_to_cpu(sb
->new_offset
);
1537 sb
->data_offset
= __cpu_to_le64(__le64_to_cpu(sb
->data_offset
) + offset_delta
);
1538 sb
->new_offset
= __cpu_to_le32(-offset_delta
);
1539 sb
->data_size
= __cpu_to_le64(__le64_to_cpu(sb
->data_size
) - offset_delta
);
1543 } else if (strcmp(update
, "_reshape_progress") == 0)
1544 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1545 else if (strcmp(update
, "writemostly") == 0)
1546 sb
->devflags
|= WriteMostly1
;
1547 else if (strcmp(update
, "readwrite") == 0)
1548 sb
->devflags
&= ~WriteMostly1
;
1549 else if (strcmp(update
, "failfast") == 0)
1550 sb
->devflags
|= FailFast1
;
1551 else if (strcmp(update
, "nofailfast") == 0)
1552 sb
->devflags
&= ~FailFast1
;
1553 else if (strcmp(update
, "layout-original") == 0 ||
1554 strcmp(update
, "layout-alternate") == 0 ||
1555 strcmp(update
, "layout-unspecified") == 0) {
1556 if (__le32_to_cpu(sb
->level
) != 0) {
1557 pr_err("%s: %s only supported for RAID0\n",
1558 devname
?:"", update
);
1560 } else if (strcmp(update
, "layout-unspecified") == 0) {
1561 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_RAID0_LAYOUT
);
1564 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT
);
1565 sb
->layout
= __cpu_to_le32(update
[7] == 'o' ? 1 : 2);
1570 sb
->sb_csum
= calc_sb_1_csum(sb
);
1575 static int init_super1(struct supertype
*st
, mdu_array_info_t
*info
,
1576 struct shape
*s
, char *name
, char *homehost
,
1577 int *uuid
, unsigned long long data_offset
)
1579 struct mdp_superblock_1
*sb
;
1584 if (posix_memalign((void**)&sb
, 4096, SUPER1_SIZE
) != 0) {
1585 pr_err("could not allocate superblock\n");
1588 memset(sb
, 0, SUPER1_SIZE
);
1592 /* zeroing superblock */
1596 spares
= info
->working_disks
- info
->active_disks
;
1597 if (info
->raid_disks
+ spares
> MAX_DEVS
) {
1598 pr_err("too many devices requested: %d+%d > %d\n",
1599 info
->raid_disks
, spares
, MAX_DEVS
);
1603 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
1604 sb
->major_version
= __cpu_to_le32(1);
1605 sb
->feature_map
= 0;
1609 copy_uuid(sb
->set_uuid
, uuid
, super1
.swapuuid
);
1611 random_uuid(sb
->set_uuid
);;
1613 if (name
== NULL
|| *name
== 0) {
1614 sprintf(defname
, "%d", info
->md_minor
);
1618 strchr(name
, ':')== NULL
&&
1619 strlen(homehost
)+1+strlen(name
) < 32) {
1620 strcpy(sb
->set_name
, homehost
);
1621 strcat(sb
->set_name
, ":");
1622 strcat(sb
->set_name
, name
);
1626 namelen
= min((int)strlen(name
),
1627 (int)sizeof(sb
->set_name
) - 1);
1628 memcpy(sb
->set_name
, name
, namelen
);
1629 memset(&sb
->set_name
[namelen
], '\0',
1630 sizeof(sb
->set_name
) - namelen
);
1633 sb
->ctime
= __cpu_to_le64((unsigned long long)time(0));
1634 sb
->level
= __cpu_to_le32(info
->level
);
1635 sb
->layout
= __cpu_to_le32(info
->layout
);
1636 sb
->size
= __cpu_to_le64(s
->size
*2ULL);
1637 sb
->chunksize
= __cpu_to_le32(info
->chunk_size
>>9);
1638 sb
->raid_disks
= __cpu_to_le32(info
->raid_disks
);
1640 sb
->data_offset
= __cpu_to_le64(data_offset
);
1641 sb
->data_size
= __cpu_to_le64(0);
1642 sb
->super_offset
= __cpu_to_le64(0);
1643 sb
->recovery_offset
= __cpu_to_le64(0);
1645 sb
->utime
= sb
->ctime
;
1646 sb
->events
= __cpu_to_le64(1);
1647 if (info
->state
& (1<<MD_SB_CLEAN
))
1648 sb
->resync_offset
= MaxSector
;
1650 sb
->resync_offset
= 0;
1651 sbsize
= sizeof(struct mdp_superblock_1
) +
1652 2 * (info
->raid_disks
+ spares
);
1653 sbsize
= ROUND_UP(sbsize
, 512);
1655 __cpu_to_le32((sbsize
- sizeof(struct mdp_superblock_1
)) / 2);
1657 memset(sb
->dev_roles
, 0xff,
1658 MAX_SB_SIZE
- sizeof(struct mdp_superblock_1
));
1660 if (s
->consistency_policy
== CONSISTENCY_POLICY_PPL
)
1661 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_PPL
);
1669 long long data_offset
;
1670 unsigned long long dev_size
;
1671 mdu_disk_info_t disk
;
1672 struct devinfo
*next
;
1675 /* Add a device to the superblock being created */
1676 static int add_to_super1(struct supertype
*st
, mdu_disk_info_t
*dk
,
1677 int fd
, char *devname
, unsigned long long data_offset
)
1679 struct mdp_superblock_1
*sb
= st
->sb
;
1680 __u16
*rp
= sb
->dev_roles
+ dk
->number
;
1681 struct devinfo
*di
, **dip
;
1684 dk_state
= dk
->state
& ~(1<<MD_DISK_FAILFAST
);
1685 if ((dk_state
& (1<<MD_DISK_ACTIVE
)) &&
1686 (dk_state
& (1<<MD_DISK_SYNC
)))/* active, sync */
1687 *rp
= __cpu_to_le16(dk
->raid_disk
);
1688 else if (dk_state
& (1<<MD_DISK_JOURNAL
))
1689 *rp
= MD_DISK_ROLE_JOURNAL
;
1690 else if ((dk_state
& ~(1<<MD_DISK_ACTIVE
)) == 0)
1691 /* active or idle -> spare */
1692 *rp
= MD_DISK_ROLE_SPARE
;
1694 *rp
= MD_DISK_ROLE_FAULTY
;
1696 if (dk
->number
>= (int)__le32_to_cpu(sb
->max_dev
) &&
1697 __le32_to_cpu(sb
->max_dev
) < MAX_DEVS
)
1698 sb
->max_dev
= __cpu_to_le32(dk
->number
+1);
1700 sb
->dev_number
= __cpu_to_le32(dk
->number
);
1701 sb
->devflags
= 0; /* don't copy another disks flags */
1702 sb
->sb_csum
= calc_sb_1_csum(sb
);
1704 dip
= (struct devinfo
**)&st
->info
;
1706 dip
= &(*dip
)->next
;
1707 di
= xmalloc(sizeof(struct devinfo
));
1709 di
->devname
= devname
;
1711 di
->data_offset
= data_offset
;
1712 get_dev_size(fd
, NULL
, &di
->dev_size
);
1719 static int locate_bitmap1(struct supertype
*st
, int fd
, int node_num
);
1721 static int store_super1(struct supertype
*st
, int fd
)
1723 struct mdp_superblock_1
*sb
= st
->sb
;
1724 unsigned long long sb_offset
;
1725 struct align_fd afd
;
1727 unsigned long long dsize
;
1729 if (!get_dev_size(fd
, NULL
, &dsize
))
1740 * Calculate the position of the superblock.
1741 * It is always aligned to a 4K boundary and
1742 * depending on minor_version, it can be:
1743 * 0: At least 8K, but less than 12K, from end of device
1744 * 1: At start of device
1745 * 2: 4K from start of device.
1747 switch(st
->minor_version
) {
1751 sb_offset
&= ~(4*2-1);
1763 if (sb_offset
!= __le64_to_cpu(sb
->super_offset
) &&
1764 0 != __le64_to_cpu(sb
->super_offset
)
1766 pr_err("internal error - sb_offset is wrong\n");
1770 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL)
1773 sbsize
= ROUND_UP(sizeof(*sb
) + 2 * __le32_to_cpu(sb
->max_dev
), 512);
1775 if (awrite(&afd
, sb
, sbsize
) != sbsize
)
1778 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1779 struct bitmap_super_s
*bm
= (struct bitmap_super_s
*)
1780 (((char*)sb
)+MAX_SB_SIZE
);
1781 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
) {
1782 locate_bitmap1(st
, fd
, 0);
1783 if (awrite(&afd
, bm
, sizeof(*bm
)) != sizeof(*bm
))
1792 static int load_super1(struct supertype
*st
, int fd
, char *devname
);
1794 static unsigned long choose_bm_space(unsigned long devsize
)
1796 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
1797 * if bigger than 200Gig, save 128k
1798 * NOTE: result must be multiple of 4K else bad things happen
1799 * on 4K-sector devices.
1803 if (devsize
- 64*2 >= 200*1024*1024*2)
1805 if (devsize
- 4*2 > 8*1024*1024*2)
1810 static void free_super1(struct supertype
*st
);
1812 __u32
crc32c_le(__u32 crc
, unsigned char const *p
, size_t len
);
1814 static int write_init_ppl1(struct supertype
*st
, struct mdinfo
*info
, int fd
)
1816 struct mdp_superblock_1
*sb
= st
->sb
;
1818 struct ppl_header
*ppl_hdr
;
1821 /* first clear entire ppl space */
1822 ret
= zero_disk_range(fd
, info
->ppl_sector
, info
->ppl_size
);
1826 ret
= posix_memalign(&buf
, 4096, PPL_HEADER_SIZE
);
1828 pr_err("Failed to allocate PPL header buffer\n");
1832 memset(buf
, 0, PPL_HEADER_SIZE
);
1834 memset(ppl_hdr
->reserved
, 0xff, PPL_HDR_RESERVED
);
1835 ppl_hdr
->signature
= __cpu_to_le32(~crc32c_le(~0, sb
->set_uuid
,
1836 sizeof(sb
->set_uuid
)));
1837 ppl_hdr
->checksum
= __cpu_to_le32(~crc32c_le(~0, buf
, PPL_HEADER_SIZE
));
1839 if (lseek64(fd
, info
->ppl_sector
* 512, SEEK_SET
) < 0) {
1841 perror("Failed to seek to PPL header location");
1844 if (!ret
&& write(fd
, buf
, PPL_HEADER_SIZE
) != PPL_HEADER_SIZE
) {
1846 perror("Write PPL header failed");
1856 #define META_BLOCK_SIZE 4096
1858 static int write_empty_r5l_meta_block(struct supertype
*st
, int fd
)
1860 struct r5l_meta_block
*mb
;
1861 struct mdp_superblock_1
*sb
= st
->sb
;
1862 struct align_fd afd
;
1867 if (posix_memalign((void**)&mb
, 4096, META_BLOCK_SIZE
) != 0) {
1868 pr_err("Could not allocate memory for the meta block.\n");
1872 memset(mb
, 0, META_BLOCK_SIZE
);
1874 mb
->magic
= __cpu_to_le32(R5LOG_MAGIC
);
1875 mb
->version
= R5LOG_VERSION
;
1876 mb
->meta_size
= __cpu_to_le32(sizeof(struct r5l_meta_block
));
1877 mb
->seq
= __cpu_to_le64(random32());
1878 mb
->position
= __cpu_to_le64(0);
1880 crc
= crc32c_le(0xffffffff, sb
->set_uuid
, sizeof(sb
->set_uuid
));
1881 crc
= crc32c_le(crc
, (void *)mb
, META_BLOCK_SIZE
);
1884 if (lseek64(fd
, __le64_to_cpu(sb
->data_offset
) * 512, 0) < 0LL) {
1885 pr_err("cannot seek to offset of the meta block\n");
1889 if (awrite(&afd
, mb
, META_BLOCK_SIZE
) != META_BLOCK_SIZE
) {
1890 pr_err("failed to store write the meta block \n");
1903 static int write_init_super1(struct supertype
*st
)
1905 struct mdp_superblock_1
*sb
= st
->sb
;
1906 struct supertype
*refst
;
1908 unsigned long long bm_space
;
1910 unsigned long long dsize
, array_size
;
1911 unsigned long long sb_offset
;
1912 unsigned long long data_offset
;
1914 int raid0_need_layout
= 0;
1916 for (di
= st
->info
; di
; di
= di
->next
) {
1917 if (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))
1918 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_JOURNAL
);
1919 if (sb
->level
== 0 && sb
->layout
!= 0) {
1920 struct devinfo
*di2
= st
->info
;
1921 unsigned long long s1
, s2
;
1923 if (di
->data_offset
!= INVALID_SECTORS
)
1924 s1
-= di
->data_offset
;
1925 s1
/= __le32_to_cpu(sb
->chunksize
);
1927 if (di2
->data_offset
!= INVALID_SECTORS
)
1928 s2
-= di2
->data_offset
;
1929 s2
/= __le32_to_cpu(sb
->chunksize
);
1931 raid0_need_layout
= 1;
1935 for (di
= st
->info
; di
; di
= di
->next
) {
1936 if (di
->disk
.state
& (1 << MD_DISK_FAULTY
))
1941 while (Kill(di
->devname
, NULL
, 0, -1, 1) == 0)
1944 sb
->dev_number
= __cpu_to_le32(di
->disk
.number
);
1945 if (di
->disk
.state
& (1<<MD_DISK_WRITEMOSTLY
))
1946 sb
->devflags
|= WriteMostly1
;
1948 sb
->devflags
&= ~WriteMostly1
;
1949 if (di
->disk
.state
& (1<<MD_DISK_FAILFAST
))
1950 sb
->devflags
|= FailFast1
;
1952 sb
->devflags
&= ~FailFast1
;
1954 random_uuid(sb
->device_uuid
);
1956 if (!(di
->disk
.state
& (1<<MD_DISK_JOURNAL
)))
1959 refst
= dup_super(st
);
1960 if (load_super1(refst
, di
->fd
, NULL
)==0) {
1961 struct mdp_superblock_1
*refsb
= refst
->sb
;
1963 memcpy(sb
->device_uuid
, refsb
->device_uuid
, 16);
1964 if (memcmp(sb
->set_uuid
, refsb
->set_uuid
, 16)==0) {
1965 /* same array, so preserve events and
1967 sb
->events
= refsb
->events
;
1968 /* bugs in 2.6.17 and earlier mean the
1969 * dev_number chosen in Manage must be preserved
1971 if (get_linux_version() >= 2006018)
1972 sb
->dev_number
= refsb
->dev_number
;
1978 if (!get_dev_size(di
->fd
, NULL
, &dsize
)) {
1991 * Calculate the position of the superblock.
1992 * It is always aligned to a 4K boundary and
1993 * depending on minor_version, it can be:
1994 * 0: At least 8K, but less than 12K, from end of device
1995 * 1: At start of device
1996 * 2: 4K from start of device.
1997 * data_offset has already been set.
1999 array_size
= __le64_to_cpu(sb
->size
);
2001 /* work out how much space we left for a bitmap */
2002 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
2003 bitmap_super_t
*bms
= (bitmap_super_t
*)
2004 (((char *)sb
) + MAX_SB_SIZE
);
2005 bm_space
= calc_bitmap_size(bms
, 4096) >> 9;
2006 bm_offset
= (long)__le32_to_cpu(sb
->bitmap_offset
);
2007 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
2008 bm_space
= MULTIPLE_PPL_AREA_SIZE_SUPER1
>> 9;
2009 if (st
->minor_version
== 0)
2010 bm_offset
= -bm_space
- 8;
2013 sb
->ppl
.offset
= __cpu_to_le16(bm_offset
);
2014 sb
->ppl
.size
= __cpu_to_le16(bm_space
);
2016 bm_space
= choose_bm_space(array_size
);
2020 data_offset
= di
->data_offset
;
2021 if (data_offset
== INVALID_SECTORS
)
2022 data_offset
= st
->data_offset
;
2023 switch(st
->minor_version
) {
2025 /* Add 8 sectors for bad block log */
2027 if (data_offset
== INVALID_SECTORS
)
2031 sb_offset
&= ~(4*2-1);
2032 sb
->data_offset
= __cpu_to_le64(data_offset
);
2033 sb
->super_offset
= __cpu_to_le64(sb_offset
);
2034 if (sb_offset
< array_size
+ bm_space
)
2035 bm_space
= sb_offset
- array_size
;
2036 sb
->data_size
= __cpu_to_le64(sb_offset
- bm_space
);
2037 if (bm_space
>= 8) {
2038 sb
->bblog_size
= __cpu_to_le16(8);
2039 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
2044 sb_offset
= st
->minor_version
== 2 ? 8 : 0;
2045 sb
->super_offset
= __cpu_to_le64(sb_offset
);
2046 if (data_offset
== INVALID_SECTORS
)
2047 data_offset
= sb_offset
+ 16;
2049 sb
->data_offset
= __cpu_to_le64(data_offset
);
2050 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
2051 if (data_offset
>= sb_offset
+bm_offset
+bm_space
+8) {
2052 sb
->bblog_size
= __cpu_to_le16(8);
2053 sb
->bblog_offset
= __cpu_to_le32(bm_offset
+
2055 } else if (data_offset
>= sb_offset
+ 16) {
2056 sb
->bblog_size
= __cpu_to_le16(8);
2057 /* '8' sectors for the bblog, and 'sb_offset'
2058 * because we want offset from superblock, not
2061 sb
->bblog_offset
= __cpu_to_le32(data_offset
-
2066 pr_err("Failed to write invalid metadata format 1.%i to %s\n",
2067 st
->minor_version
, di
->devname
);
2072 * Disable badblock log on clusters, or when
2073 * explicitly requested
2075 if (st
->nodes
> 0 || conf_get_create_info()->bblist
== 0) {
2077 sb
->bblog_offset
= 0;
2080 /* RAID0 needs a layout if devices aren't all the same size */
2081 if (raid0_need_layout
)
2082 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT
);
2084 sb
->sb_csum
= calc_sb_1_csum(sb
);
2085 rv
= store_super1(st
, di
->fd
);
2087 if (rv
== 0 && (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))) {
2088 rv
= write_empty_r5l_meta_block(st
, di
->fd
);
2094 (__le32_to_cpu(sb
->feature_map
) &
2095 MD_FEATURE_BITMAP_OFFSET
)) {
2096 rv
= st
->ss
->write_bitmap(st
, di
->fd
, NodeNumUpdate
);
2097 } else if (rv
== 0 &&
2098 md_feature_any_ppl_on(sb
->feature_map
)) {
2101 st
->ss
->getinfo_super(st
, &info
, NULL
);
2102 rv
= st
->ss
->write_init_ppl(st
, &info
, di
->fd
);
2112 pr_err("Failed to write metadata to %s\n", di
->devname
);
2117 static int compare_super1(struct supertype
*st
, struct supertype
*tst
)
2121 * 0 same, or first was empty, and second was copied
2122 * 1 second had wrong number
2124 * 3 wrong other info
2126 struct mdp_superblock_1
*first
= st
->sb
;
2127 struct mdp_superblock_1
*second
= tst
->sb
;
2129 if (second
->magic
!= __cpu_to_le32(MD_SB_MAGIC
))
2131 if (second
->major_version
!= __cpu_to_le32(1))
2135 if (posix_memalign((void**)&first
, 4096, SUPER1_SIZE
) != 0) {
2136 pr_err("could not allocate superblock\n");
2139 memcpy(first
, second
, SUPER1_SIZE
);
2143 if (memcmp(first
->set_uuid
, second
->set_uuid
, 16)!= 0)
2146 if (first
->ctime
!= second
->ctime
||
2147 first
->level
!= second
->level
||
2148 first
->layout
!= second
->layout
||
2149 first
->size
!= second
->size
||
2150 first
->chunksize
!= second
->chunksize
||
2151 first
->raid_disks
!= second
->raid_disks
)
2156 static int load_super1(struct supertype
*st
, int fd
, char *devname
)
2158 unsigned long long dsize
;
2159 unsigned long long sb_offset
;
2160 struct mdp_superblock_1
*super
;
2162 struct bitmap_super_s
*bsb
;
2163 struct misc_dev_info
*misc
;
2164 struct align_fd afd
;
2170 if (st
->ss
== NULL
|| st
->minor_version
== -1) {
2172 struct supertype tst
;
2173 __u64 bestctime
= 0;
2174 /* guess... choose latest ctime */
2175 memset(&tst
, 0, sizeof(tst
));
2177 for (tst
.minor_version
= 0; tst
.minor_version
<= 2;
2178 tst
.minor_version
++) {
2179 switch(load_super1(&tst
, fd
, devname
)) {
2180 case 0: super
= tst
.sb
;
2181 if (bestvers
== -1 ||
2182 bestctime
< __le64_to_cpu(super
->ctime
)) {
2183 bestvers
= tst
.minor_version
;
2184 bestctime
= __le64_to_cpu(super
->ctime
);
2189 case 1: return 1; /*bad device */
2190 case 2: break; /* bad, try next */
2193 if (bestvers
!= -1) {
2195 tst
.minor_version
= bestvers
;
2197 tst
.max_devs
= MAX_DEVS
;
2198 rv
= load_super1(&tst
, fd
, devname
);
2205 if (!get_dev_size(fd
, devname
, &dsize
))
2211 pr_err("%s is too small for md: size is %llu sectors.\n",
2217 * Calculate the position of the superblock.
2218 * It is always aligned to a 4K boundary and
2219 * depending on minor_version, it can be:
2220 * 0: At least 8K, but less than 12K, from end of device
2221 * 1: At start of device
2222 * 2: 4K from start of device.
2224 switch(st
->minor_version
) {
2228 sb_offset
&= ~(4*2-1);
2240 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL) {
2242 pr_err("Cannot seek to superblock on %s: %s\n",
2243 devname
, strerror(errno
));
2247 if (posix_memalign((void**)&super
, 4096, SUPER1_SIZE
) != 0) {
2248 pr_err("could not allocate superblock\n");
2252 memset(super
, 0, SUPER1_SIZE
);
2254 if (aread(&afd
, super
, MAX_SB_SIZE
) != MAX_SB_SIZE
) {
2256 pr_err("Cannot read superblock on %s\n",
2262 if (__le32_to_cpu(super
->magic
) != MD_SB_MAGIC
) {
2264 pr_err("No super block found on %s (Expected magic %08x, got %08x)\n",
2265 devname
, MD_SB_MAGIC
,
2266 __le32_to_cpu(super
->magic
));
2271 if (__le32_to_cpu(super
->major_version
) != 1) {
2273 pr_err("Cannot interpret superblock on %s - version is %d\n",
2274 devname
, __le32_to_cpu(super
->major_version
));
2278 if (__le64_to_cpu(super
->super_offset
) != sb_offset
) {
2280 pr_err("No superblock found on %s (super_offset is wrong)\n",
2287 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
2289 misc
= (struct misc_dev_info
*)
2290 (((char*)super
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
2291 misc
->device_size
= dsize
;
2292 if (st
->data_offset
== INVALID_SECTORS
)
2293 st
->data_offset
= __le64_to_cpu(super
->data_offset
);
2295 /* Now check on the bitmap superblock */
2296 if ((__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) == 0)
2298 /* Read the bitmap superblock and make sure it looks
2299 * valid. If it doesn't clear the bit. An --assemble --force
2300 * should get that written out.
2302 locate_bitmap1(st
, fd
, 0);
2303 if (aread(&afd
, bsb
, 512) != 512)
2306 uuid_from_super1(st
, uuid
);
2307 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
2308 memcmp(bsb
->uuid
, uuid
, 16) != 0)
2313 super
->feature_map
= __cpu_to_le32(__le32_to_cpu(super
->feature_map
)
2314 & ~MD_FEATURE_BITMAP_OFFSET
);
2318 static struct supertype
*match_metadata_desc1(char *arg
)
2320 struct supertype
*st
= xcalloc(1, sizeof(*st
));
2322 st
->container_devnm
[0] = 0;
2324 st
->max_devs
= MAX_DEVS
;
2326 st
->data_offset
= INVALID_SECTORS
;
2327 /* leading zeros can be safely ignored. --detail generates them. */
2330 if (strcmp(arg
, "1.0") == 0 || strcmp(arg
, "1.00") == 0) {
2331 st
->minor_version
= 0;
2334 if (strcmp(arg
, "1.1") == 0 || strcmp(arg
, "1.01") == 0
2336 st
->minor_version
= 1;
2339 if (strcmp(arg
, "1.2") == 0 ||
2340 #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
2341 strcmp(arg
, "default") == 0 ||
2342 #endif /* DEFAULT_OLD_METADATA */
2343 strcmp(arg
, "1.02") == 0) {
2344 st
->minor_version
= 2;
2347 if (strcmp(arg
, "1") == 0 || strcmp(arg
, "default") == 0) {
2348 st
->minor_version
= -1;
2356 /* find available size on device with this devsize, using
2357 * superblock type st, and reserving 'reserve' sectors for
2360 static __u64
avail_size1(struct supertype
*st
, __u64 devsize
,
2361 unsigned long long data_offset
)
2363 struct mdp_superblock_1
*super
= st
->sb
;
2369 if (__le32_to_cpu(super
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
) {
2370 /* hot-add. allow for actual size of bitmap */
2371 struct bitmap_super_s
*bsb
;
2372 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
2373 bmspace
= calc_bitmap_size(bsb
, 4096) >> 9;
2374 } else if (md_feature_any_ppl_on(super
->feature_map
)) {
2375 bmspace
= __le16_to_cpu(super
->ppl
.size
);
2378 /* Allow space for bad block log */
2379 if (super
->bblog_size
)
2380 bbspace
= __le16_to_cpu(super
->bblog_size
);
2382 if (st
->minor_version
< 0)
2383 /* not specified, so time to set default */
2384 st
->minor_version
= 2;
2386 if (data_offset
== INVALID_SECTORS
)
2387 data_offset
= st
->data_offset
;
2389 if (data_offset
!= INVALID_SECTORS
)
2390 switch(st
->minor_version
) {
2392 return devsize
- data_offset
- 8*2 - bbspace
;
2395 return devsize
- data_offset
;
2402 switch(st
->minor_version
) {
2405 return ((devsize
- 8*2 - bbspace
) & ~(4*2-1));
2407 /* at start, 4K for superblock and possible bitmap */
2408 return devsize
- 4*2 - bbspace
;
2410 /* 4k from start, 4K for superblock and possible bitmap */
2411 return devsize
- (4+4)*2 - bbspace
;
2417 add_internal_bitmap1(struct supertype
*st
,
2418 int *chunkp
, int delay
, int write_behind
,
2419 unsigned long long size
,
2420 int may_change
, int major
)
2423 * If not may_change, then this is a 'Grow' without sysfs support for
2424 * bitmaps, and the bitmap must fit after the superblock at 1K offset.
2425 * If may_change, then this is create or a Grow with sysfs support,
2426 * and we can put the bitmap wherever we like.
2428 * size is in sectors, chunk is in bytes !!!
2431 unsigned long long bits
;
2432 unsigned long long max_bits
;
2433 unsigned long long min_chunk
;
2435 long bbl_offset
, bbl_size
;
2436 unsigned long long chunk
= *chunkp
;
2440 struct mdp_superblock_1
*sb
= st
->sb
;
2441 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
2444 if (__le64_to_cpu(sb
->data_size
) == 0)
2446 * Must be creating the array, else data_size
2450 switch(st
->minor_version
) {
2453 * either 3K after the superblock (when hot-add),
2454 * or some amount of space before.
2458 * We are creating array, so we *know* how much room has
2464 choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2466 room
= __le64_to_cpu(sb
->super_offset
)
2467 - __le64_to_cpu(sb
->data_offset
)
2468 - __le64_to_cpu(sb
->data_size
);
2469 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2472 bbl_offset
= (__s32
)__le32_to_cpu(sb
->bblog_offset
);
2473 if (bbl_size
< -bbl_offset
)
2474 bbl_size
= -bbl_offset
;
2477 (room
< 3*2 && __le32_to_cpu(sb
->max_dev
) <= 384)) {
2482 offset
= 0; /* means movable offset */
2487 case 2: /* between superblock and data */
2492 choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2494 room
= __le64_to_cpu(sb
->data_offset
)
2495 - __le64_to_cpu(sb
->super_offset
);
2496 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2499 __le32_to_cpu(sb
->bblog_offset
) + bbl_size
;
2504 room
-= 2; /* Leave 1K for superblock */
2508 room
-= 4*2; /* leave 4K for superblock */
2518 if (chunk
== UnSet
&& room
> 128*2)
2519 /* Limit to 128K of bitmap when chunk size not requested */
2523 /* No room for a bitmap */
2526 max_bits
= (room
* 512 - sizeof(bitmap_super_t
)) * 8;
2528 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
2529 bits
= (size
*512)/min_chunk
+1;
2530 while (bits
> max_bits
) {
2534 if (chunk
== UnSet
) {
2535 /* For practical purpose, 64Meg is a good
2536 * default chunk size for internal bitmaps.
2539 if (chunk
< 64*1024*1024)
2540 chunk
= 64*1024*1024;
2541 } else if (chunk
< min_chunk
)
2542 return -EINVAL
; /* chunk size too small */
2543 if (chunk
== 0) /* rounding problem */
2547 /* start bitmap on a 4K boundary with enough space for
2550 bits
= (size
*512) / chunk
+ 1;
2551 room
= ((bits
+7)/8 + sizeof(bitmap_super_t
) +4095)/4096;
2552 room
*= 8; /* convert 4K blocks to sectors */
2553 offset
= -room
- bbl_size
;
2556 sb
->bitmap_offset
= (int32_t)__cpu_to_le32(offset
);
2558 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
) |
2559 MD_FEATURE_BITMAP_OFFSET
);
2560 memset(bms
, 0, sizeof(*bms
));
2561 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
2562 bms
->version
= __cpu_to_le32(major
);
2563 uuid_from_super1(st
, uuid
);
2564 memcpy(bms
->uuid
, uuid
, 16);
2565 bms
->chunksize
= __cpu_to_le32(chunk
);
2566 bms
->daemon_sleep
= __cpu_to_le32(delay
);
2567 bms
->sync_size
= __cpu_to_le64(size
);
2568 bms
->write_behind
= __cpu_to_le32(write_behind
);
2569 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2571 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
) |
2572 MD_FEATURE_BITMAP_VERSIONED
);
2573 if (st
->cluster_name
) {
2574 len
= sizeof(bms
->cluster_name
);
2575 strncpy((char *)bms
->cluster_name
, st
->cluster_name
, len
);
2576 bms
->cluster_name
[len
- 1] = '\0';
2583 static int locate_bitmap1(struct supertype
*st
, int fd
, int node_num
)
2585 unsigned long long offset
;
2586 struct mdp_superblock_1
*sb
;
2591 if (st
->ss
->load_super(st
, fd
, NULL
))
2592 return -1; /* no error I hope... */
2597 if ((__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
))
2601 offset
= __le64_to_cpu(sb
->super_offset
);
2602 offset
+= (int32_t) __le32_to_cpu(sb
->bitmap_offset
) * (node_num
+ 1);
2605 lseek64(fd
, offset
<<9, 0);
2609 static int write_bitmap1(struct supertype
*st
, int fd
, enum bitmap_update update
)
2611 struct mdp_superblock_1
*sb
= st
->sb
;
2612 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+MAX_SB_SIZE
);
2615 int towrite
, n
, len
;
2616 struct align_fd afd
;
2618 unsigned long long total_bm_space
, bm_space_per_node
;
2622 /* update cluster name */
2623 if (st
->cluster_name
) {
2624 len
= sizeof(bms
->cluster_name
);
2625 memset((char *)bms
->cluster_name
, 0, len
);
2626 strncpy((char *)bms
->cluster_name
,
2627 st
->cluster_name
, len
);
2628 bms
->cluster_name
[len
- 1] = '\0';
2632 /* cluster md only supports superblock 1.2 now */
2633 if (st
->minor_version
!= 2 &&
2634 bms
->version
== BITMAP_MAJOR_CLUSTERED
) {
2635 pr_err("Warning: cluster md only works with superblock 1.2\n");
2639 if (bms
->version
== BITMAP_MAJOR_CLUSTERED
) {
2640 if (__cpu_to_le32(st
->nodes
) < bms
->nodes
) {
2642 * Since the nodes num is not increased, no
2643 * need to check the space enough or not,
2644 * just update bms->nodes
2646 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2651 * no need to change bms->nodes for other
2655 pr_err("Warning: --nodes option is only suitable for clustered bitmap\n");
2660 * Each node has an independent bitmap, it is necessary to
2661 * calculate the space is enough or not, first get how many
2662 * bytes for the total bitmap
2664 bm_space_per_node
= calc_bitmap_size(bms
, 4096);
2666 total_bm_space
= 512 * (__le64_to_cpu(sb
->data_offset
) -
2667 __le64_to_cpu(sb
->super_offset
));
2668 /* leave another 4k for superblock */
2669 total_bm_space
= total_bm_space
- 4096;
2671 if (bm_space_per_node
* st
->nodes
> total_bm_space
) {
2672 pr_err("Warning: The max num of nodes can't exceed %llu\n",
2673 total_bm_space
/ bm_space_per_node
);
2677 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2686 locate_bitmap1(st
, fd
, 0);
2688 if (posix_memalign(&buf
, 4096, 4096))
2692 /* Only the bitmap[0] should resync
2693 * whole device on initial assembly
2696 memset(buf
, 0x00, 4096);
2698 memset(buf
, 0xff, 4096);
2699 memcpy(buf
, (char *)bms
, sizeof(bitmap_super_t
));
2702 * use 4096 boundary if bitmap_offset is aligned
2703 * with 8 sectors, then it should compatible with
2706 if (__le32_to_cpu(sb
->bitmap_offset
) & 7)
2707 towrite
= calc_bitmap_size(bms
, 512);
2709 towrite
= calc_bitmap_size(bms
, 4096);
2710 while (towrite
> 0) {
2714 n
= awrite(&afd
, buf
, n
);
2720 memset(buf
, 0x00, 4096);
2722 memset(buf
, 0xff, 4096);
2729 } while (++i
< __le32_to_cpu(bms
->nodes
));
2735 static void free_super1(struct supertype
*st
)
2741 struct devinfo
*di
= st
->info
;
2742 st
->info
= di
->next
;
2750 static int validate_geometry1(struct supertype
*st
, int level
,
2751 int layout
, int raiddisks
,
2752 int *chunk
, unsigned long long size
,
2753 unsigned long long data_offset
,
2754 char *subdev
, unsigned long long *freesize
,
2755 int consistency_policy
, int verbose
)
2757 unsigned long long ldsize
, devsize
;
2759 unsigned long long headroom
;
2760 unsigned long long overhead
;
2763 if (level
== LEVEL_CONTAINER
) {
2765 pr_err("1.x metadata does not support containers\n");
2768 if (*chunk
== UnSet
)
2769 *chunk
= DEFAULT_CHUNK
;
2774 if (st
->minor_version
< 0)
2775 /* not specified, so time to set default */
2776 st
->minor_version
= 2;
2778 fd
= open(subdev
, O_RDONLY
|O_EXCL
, 0);
2781 pr_err("super1.x cannot open %s: %s\n",
2782 subdev
, strerror(errno
));
2786 if (!get_dev_size(fd
, subdev
, &ldsize
)) {
2792 devsize
= ldsize
>> 9;
2794 /* creating: allow suitable space for bitmap or PPL */
2795 if (consistency_policy
== CONSISTENCY_POLICY_PPL
)
2796 bmspace
= MULTIPLE_PPL_AREA_SIZE_SUPER1
>> 9;
2798 bmspace
= choose_bm_space(devsize
);
2800 if (data_offset
== INVALID_SECTORS
)
2801 data_offset
= st
->data_offset
;
2802 if (data_offset
== INVALID_SECTORS
)
2803 switch (st
->minor_version
) {
2809 /* Choose data offset appropriate for this device
2810 * and use as default for whole array.
2811 * The data_offset must allow for bitmap space
2812 * and base metadata, should allow for some headroom
2813 * for reshape, and should be rounded to multiple
2815 * Headroom is limited to 128M, but aim for about 0.1%
2817 headroom
= 128*1024*2;
2818 while ((headroom
<< 10) > devsize
&&
2820 headroom
/ 2 >= ((unsigned)(*chunk
)*2)*2))
2822 data_offset
= 12*2 + bmspace
+ headroom
;
2823 #define ONE_MEG (2*1024)
2824 data_offset
= ROUND_UP(data_offset
, ONE_MEG
);
2827 if (st
->data_offset
== INVALID_SECTORS
)
2828 st
->data_offset
= data_offset
;
2829 switch(st
->minor_version
) {
2830 case 0: /* metadata at end. Round down and subtract space to reserve */
2831 devsize
= (devsize
& ~(4ULL*2-1));
2832 /* space for metadata, bblog, bitmap/ppl */
2833 overhead
= 8*2 + 8 + bmspace
;
2834 if (devsize
< overhead
) /* detect underflow */
2835 goto dev_too_small_err
;
2836 devsize
-= overhead
;
2840 if (devsize
< data_offset
) /* detect underflow */
2841 goto dev_too_small_err
;
2842 devsize
-= data_offset
;
2845 *freesize
= devsize
;
2848 /* Error condition, device cannot even hold the overhead. */
2850 fprintf(stderr
, "device %s is too small (%lluK) for "
2851 "required metadata!\n", subdev
, devsize
>>1);
2856 void *super1_make_v0(struct supertype
*st
, struct mdinfo
*info
, mdp_super_t
*sb0
)
2858 /* Create a v1.0 superblock based on 'info'*/
2860 struct mdp_superblock_1
*sb
;
2862 unsigned long long offset
;
2864 if (posix_memalign(&ret
, 4096, 1024) != 0)
2867 memset(ret
, 0, 1024);
2868 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
2869 sb
->major_version
= __cpu_to_le32(1);
2871 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
2872 sprintf(sb
->set_name
, "%d", sb0
->md_minor
);
2873 sb
->ctime
= __cpu_to_le32(info
->array
.ctime
+1);
2874 sb
->level
= __cpu_to_le32(info
->array
.level
);
2875 sb
->layout
= __cpu_to_le32(info
->array
.layout
);
2876 sb
->size
= __cpu_to_le64(info
->component_size
);
2877 sb
->chunksize
= __cpu_to_le32(info
->array
.chunk_size
/512);
2878 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
2879 if (info
->array
.level
> 0)
2880 sb
->data_size
= sb
->size
;
2882 sb
->data_size
= st
->ss
->avail_size(st
, st
->devsize
/512, 0);
2883 sb
->resync_offset
= MaxSector
;
2884 sb
->max_dev
= __cpu_to_le32(MD_SB_DISKS
);
2885 sb
->dev_number
= __cpu_to_le32(info
->disk
.number
);
2886 sb
->utime
= __cpu_to_le64(info
->array
.utime
);
2888 offset
= st
->devsize
/512 - 8*2;
2890 sb
->super_offset
= __cpu_to_le64(offset
);
2891 //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset);
2893 random_uuid(sb
->device_uuid
);
2895 for (i
= 0; i
< MD_SB_DISKS
; i
++) {
2896 int state
= sb0
->disks
[i
].state
;
2897 sb
->dev_roles
[i
] = MD_DISK_ROLE_SPARE
;
2898 if ((state
& (1<<MD_DISK_SYNC
)) &&
2899 !(state
& (1<<MD_DISK_FAULTY
)))
2900 sb
->dev_roles
[i
] = __cpu_to_le16(sb0
->disks
[i
].raid_disk
);
2902 sb
->sb_csum
= calc_sb_1_csum(sb
);
2906 struct superswitch super1
= {
2907 .examine_super
= examine_super1
,
2908 .brief_examine_super
= brief_examine_super1
,
2909 .export_examine_super
= export_examine_super1
,
2910 .detail_super
= detail_super1
,
2911 .brief_detail_super
= brief_detail_super1
,
2912 .export_detail_super
= export_detail_super1
,
2913 .write_init_super
= write_init_super1
,
2914 .validate_geometry
= validate_geometry1
,
2915 .add_to_super
= add_to_super1
,
2916 .examine_badblocks
= examine_badblocks_super1
,
2917 .copy_metadata
= copy_metadata1
,
2918 .write_init_ppl
= write_init_ppl1
,
2919 .match_home
= match_home1
,
2920 .uuid_from_super
= uuid_from_super1
,
2921 .getinfo_super
= getinfo_super1
,
2922 .container_content
= container_content1
,
2923 .update_super
= update_super1
,
2924 .init_super
= init_super1
,
2925 .store_super
= store_super1
,
2926 .compare_super
= compare_super1
,
2927 .load_super
= load_super1
,
2928 .match_metadata_desc
= match_metadata_desc1
,
2929 .avail_size
= avail_size1
,
2930 .add_internal_bitmap
= add_internal_bitmap1
,
2931 .locate_bitmap
= locate_bitmap1
,
2932 .write_bitmap
= write_bitmap1
,
2933 .free_super
= free_super1
,
2934 #if __BYTE_ORDER == BIG_ENDIAN