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
;
333 int inconsistent
= 0;
335 printf(" Magic : %08x\n", __le32_to_cpu(sb
->magic
));
336 printf(" Version : 1");
337 sb_offset
= __le64_to_cpu(sb
->super_offset
);
340 else if (sb_offset
<= 8)
344 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb
->feature_map
));
345 printf(" Array UUID : ");
346 for (i
= 0; i
< 16; i
++) {
347 if ((i
& 3) == 0 && i
!= 0)
349 printf("%02x", sb
->set_uuid
[i
]);
352 printf(" Name : %.32s", sb
->set_name
);
353 if (l
> 0 && l
< 32 &&
354 sb
->set_name
[l
] == ':' &&
355 strncmp(sb
->set_name
, homehost
, l
) == 0)
356 printf(" (local to host %s)", homehost
);
358 if (bms
->nodes
> 0 &&
359 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
))
360 printf(" Cluster Name : %-64s\n", bms
->cluster_name
);
361 atime
= __le64_to_cpu(sb
->ctime
) & 0xFFFFFFFFFFULL
;
362 printf(" Creation Time : %.24s\n", ctime(&atime
));
363 c
=map_num(pers
, __le32_to_cpu(sb
->level
));
364 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
365 printf(" Raid Devices : %d\n", __le32_to_cpu(sb
->raid_disks
));
367 printf(" Avail Dev Size : %llu sectors%s\n",
368 (unsigned long long)__le64_to_cpu(sb
->data_size
),
369 human_size(__le64_to_cpu(sb
->data_size
)<<9));
370 if (__le32_to_cpu(sb
->level
) > 0) {
371 int ddsks
= 0, ddsks_denom
= 1;
372 switch(__le32_to_cpu(sb
->level
)) {
373 case 1: ddsks
=1;break;
375 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
376 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
378 layout
= __le32_to_cpu(sb
->layout
);
379 ddsks
= __le32_to_cpu(sb
->raid_disks
);
380 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
383 long long asize
= __le64_to_cpu(sb
->size
);
384 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
385 printf(" Array Size : %llu KiB%s\n",
386 asize
>> 10, human_size(asize
));
388 if (sb
->size
!= sb
->data_size
)
389 printf(" Used Dev Size : %llu sectors%s\n",
390 (unsigned long long)__le64_to_cpu(sb
->size
),
391 human_size(__le64_to_cpu(sb
->size
)<<9));
394 printf(" Data Offset : %llu sectors\n",
395 (unsigned long long)__le64_to_cpu(sb
->data_offset
));
396 if (sb
->new_offset
&&
397 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
)) {
398 unsigned long long offset
= __le64_to_cpu(sb
->data_offset
);
399 offset
+= (signed)(int32_t)__le32_to_cpu(sb
->new_offset
);
400 printf(" New Offset : %llu sectors\n", offset
);
402 printf(" Super Offset : %llu sectors\n",
403 (unsigned long long)__le64_to_cpu(sb
->super_offset
));
404 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_RECOVERY_OFFSET
)
405 printf("Recovery Offset : %llu sectors\n",
406 (unsigned long long)__le64_to_cpu(sb
->recovery_offset
));
408 st
->ss
->getinfo_super(st
, &info
, NULL
);
409 if (info
.space_after
!= 1 &&
410 !(__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
)) {
411 printf(" Unused Space : before=%llu sectors, ",
413 if (info
.space_after
< INT64_MAX
)
414 printf("after=%llu sectors\n", info
.space_after
);
416 printf("after=-%llu sectors DEVICE TOO SMALL\n",
417 UINT64_MAX
- info
.space_after
);
419 printf(" State : %s%s\n",
420 (__le64_to_cpu(sb
->resync_offset
) + 1) ? "active":"clean",
421 (info
.space_after
> INT64_MAX
) ? " TRUNCATED DEVICE" : "");
422 printf(" Device UUID : ");
423 for (i
= 0; i
< 16; i
++) {
424 if ((i
& 3)==0 && i
!= 0)
426 printf("%02x", sb
->device_uuid
[i
]);
430 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
431 printf("Internal Bitmap : %ld sectors from superblock\n",
432 (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
));
433 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
434 printf(" PPL : %u sectors at offset %d sectors from superblock\n",
435 __le16_to_cpu(sb
->ppl
.size
),
436 __le16_to_cpu(sb
->ppl
.offset
));
438 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)) {
439 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)
440 __le64_to_cpu(sb
->reshape_position
)/2,
441 human_size(__le64_to_cpu(sb
->reshape_position
)<<9));
442 if (__le32_to_cpu(sb
->delta_disks
)) {
443 printf(" Delta Devices : %d",
444 __le32_to_cpu(sb
->delta_disks
));
445 printf(" (%d->%d)\n",
446 __le32_to_cpu(sb
->raid_disks
) -
447 __le32_to_cpu(sb
->delta_disks
),
448 __le32_to_cpu(sb
->raid_disks
));
449 if ((int)__le32_to_cpu(sb
->delta_disks
) < 0)
450 delta_extra
= -__le32_to_cpu(sb
->delta_disks
);
452 if (__le32_to_cpu(sb
->new_level
) != __le32_to_cpu(sb
->level
)) {
453 c
= map_num(pers
, __le32_to_cpu(sb
->new_level
));
454 printf(" New Level : %s\n", c
?c
:"-unknown-");
456 if (__le32_to_cpu(sb
->new_layout
) !=
457 __le32_to_cpu(sb
->layout
)) {
458 if (__le32_to_cpu(sb
->level
) == 5) {
459 c
= map_num(r5layout
,
460 __le32_to_cpu(sb
->new_layout
));
461 printf(" New Layout : %s\n", c
?c
:"-unknown-");
463 if (__le32_to_cpu(sb
->level
) == 6) {
464 c
= map_num(r6layout
,
465 __le32_to_cpu(sb
->new_layout
));
466 printf(" New Layout : %s\n", c
?c
:"-unknown-");
468 if (__le32_to_cpu(sb
->level
) == 10) {
469 printf(" New Layout :");
470 print_r10_layout(__le32_to_cpu(sb
->new_layout
));
474 if (__le32_to_cpu(sb
->new_chunk
) !=
475 __le32_to_cpu(sb
->chunksize
))
476 printf(" New Chunksize : %dK\n",
477 __le32_to_cpu(sb
->new_chunk
)/2);
482 if (sb
->devflags
& WriteMostly1
)
483 printf(" write-mostly");
484 if (sb
->devflags
& FailFast1
)
489 atime
= __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
;
490 printf(" Update Time : %.24s\n", ctime(&atime
));
492 if (sb
->bblog_size
&& sb
->bblog_offset
) {
493 printf(" Bad Block Log : %d entries available at offset %ld sectors",
494 __le16_to_cpu(sb
->bblog_size
)*512/8,
495 (long)(int32_t)__le32_to_cpu(sb
->bblog_offset
));
496 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
497 printf(" - bad blocks present.");
501 if (calc_sb_1_csum(sb
) == sb
->sb_csum
)
502 printf(" Checksum : %x - correct\n",
503 __le32_to_cpu(sb
->sb_csum
));
505 printf(" Checksum : %x - expected %x\n",
506 __le32_to_cpu(sb
->sb_csum
),
507 __le32_to_cpu(calc_sb_1_csum(sb
)));
508 printf(" Events : %llu\n",
509 (unsigned long long)__le64_to_cpu(sb
->events
));
511 if (__le32_to_cpu(sb
->level
) == 0 &&
512 (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT
))) {
513 c
= map_num(r0layout
, __le32_to_cpu(sb
->layout
));
514 printf(" Layout : %s\n", c
?c
:"-unknown-");
516 if (__le32_to_cpu(sb
->level
) == 5) {
517 c
= map_num(r5layout
, __le32_to_cpu(sb
->layout
));
518 printf(" Layout : %s\n", c
?c
:"-unknown-");
520 if (__le32_to_cpu(sb
->level
) == 6) {
521 c
= map_num(r6layout
, __le32_to_cpu(sb
->layout
));
522 printf(" Layout : %s\n", c
?c
:"-unknown-");
524 if (__le32_to_cpu(sb
->level
) == 10) {
525 int lo
= __le32_to_cpu(sb
->layout
);
527 print_r10_layout(lo
);
530 switch(__le32_to_cpu(sb
->level
)) {
536 printf(" Chunk Size : %dK\n",
537 __le32_to_cpu(sb
->chunksize
)/2);
540 printf(" Rounding : %dK\n",
541 __le32_to_cpu(sb
->chunksize
)/2);
547 printf(" Device Role : ");
548 role
= role_from_sb(sb
);
549 if (role
>= MD_DISK_ROLE_FAULTY
)
551 else if (role
== MD_DISK_ROLE_JOURNAL
)
553 else if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_REPLACEMENT
))
554 printf("Replacement device %d\n", role
);
556 printf("Active device %d\n", role
);
558 printf(" Array State : ");
559 for (d
= 0; d
< __le32_to_cpu(sb
->raid_disks
) + delta_extra
; d
++) {
562 for (i
= 0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
563 unsigned int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
567 if (cnt
== 2 && __le32_to_cpu(sb
->level
) > 0)
578 printf(" ('A' == active, '.' == missing, 'R' == replacing)");
580 for (d
= 0; d
< __le32_to_cpu(sb
->max_dev
); d
++) {
581 unsigned int r
= __le16_to_cpu(sb
->dev_roles
[d
]);
582 if (r
<= MD_DISK_ROLE_MAX
&&
583 r
> __le32_to_cpu(sb
->raid_disks
) + delta_extra
)
587 printf("WARNING Array state is inconsistent - each number should appear only once\n");
588 for (d
= 0; d
< __le32_to_cpu(sb
->max_dev
); d
++)
589 if (__le16_to_cpu(sb
->dev_roles
[d
]) >=
594 __le16_to_cpu(sb
->dev_roles
[d
]));
599 static void brief_examine_super1(struct supertype
*st
, int verbose
)
601 struct mdp_superblock_1
*sb
= st
->sb
;
603 unsigned long long sb_offset
;
605 char *c
= map_num(pers
, __le32_to_cpu(sb
->level
));
607 nm
= strchr(sb
->set_name
, ':');
610 else if (sb
->set_name
[0])
617 printf(DEV_MD_DIR
"%s", nm
);
621 printf(" level=%s", c
);
622 sb_offset
= __le64_to_cpu(sb
->super_offset
);
624 printf(" metadata=1.1 ");
625 else if (sb_offset
<= 8)
626 printf(" metadata=1.2 ");
628 printf(" metadata=1.0 ");
630 printf("num-devices=%d ", __le32_to_cpu(sb
->raid_disks
));
632 for (i
= 0; i
< 16; i
++) {
633 if ((i
& 3)==0 && i
!= 0)
635 printf("%02x", sb
->set_uuid
[i
]);
640 static void export_examine_super1(struct supertype
*st
)
642 struct mdp_superblock_1
*sb
= st
->sb
;
647 printf("MD_LEVEL=%s\n", map_num_s(pers
, __le32_to_cpu(sb
->level
)));
648 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb
->raid_disks
));
649 for (i
= 0; i
< 32; i
++)
650 if (sb
->set_name
[i
] == '\n' || sb
->set_name
[i
] == '\0') {
655 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
656 if (__le32_to_cpu(sb
->level
) > 0) {
657 int ddsks
= 0, ddsks_denom
= 1;
658 switch(__le32_to_cpu(sb
->level
)) {
664 ddsks
= __le32_to_cpu(sb
->raid_disks
)-1;
667 ddsks
= __le32_to_cpu(sb
->raid_disks
)-2;
670 layout
= __le32_to_cpu(sb
->layout
);
671 ddsks
= __le32_to_cpu(sb
->raid_disks
);
672 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
675 long long asize
= __le64_to_cpu(sb
->size
);
676 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
677 printf("MD_ARRAY_SIZE=%s\n",
678 human_size_brief(asize
, JEDEC
));
682 for (i
= 0; i
< 16; i
++) {
683 if ((i
& 3) == 0 && i
!= 0)
685 printf("%02x", sb
->set_uuid
[i
]);
688 printf("MD_UPDATE_TIME=%llu\n",
689 __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
);
690 printf("MD_DEV_UUID=");
691 for (i
= 0; i
< 16; i
++) {
692 if ((i
& 3) == 0 && i
!= 0)
694 printf("%02x", sb
->device_uuid
[i
]);
697 printf("MD_EVENTS=%llu\n",
698 (unsigned long long)__le64_to_cpu(sb
->events
));
701 static int copy_metadata1(struct supertype
*st
, int from
, int to
)
703 /* Read superblock. If it looks good, write it out.
704 * Then if a bitmap is present, copy that.
705 * And if a bad-block-list is present, copy that too.
708 unsigned long long dsize
, sb_offset
;
709 const int bufsize
= 4*1024;
710 struct mdp_superblock_1 super
, *sb
;
712 if (posix_memalign(&buf
, 4096, bufsize
) != 0)
715 if (!get_dev_size(from
, NULL
, &dsize
))
721 switch(st
->minor_version
) {
725 sb_offset
&= ~(4*2-1);
737 if (lseek64(from
, sb_offset
<< 9, 0) < 0LL)
739 if (read(from
, buf
, bufsize
) != bufsize
)
743 super
= *sb
; // save most of sb for when we reuse buf
745 if (__le32_to_cpu(super
.magic
) != MD_SB_MAGIC
||
746 __le32_to_cpu(super
.major_version
) != 1 ||
747 __le64_to_cpu(super
.super_offset
) != sb_offset
||
748 calc_sb_1_csum(sb
) != super
.sb_csum
)
751 if (lseek64(to
, sb_offset
<< 9, 0) < 0LL)
753 if (write(to
, buf
, bufsize
) != bufsize
)
756 if (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
757 unsigned long long bitmap_offset
= sb_offset
;
758 int bytes
= 4096; // just an estimate.
760 struct align_fd afrom
, ato
;
762 init_afd(&afrom
, from
);
765 bitmap_offset
+= (int32_t)__le32_to_cpu(super
.bitmap_offset
);
767 if (lseek64(from
, bitmap_offset
<<9, 0) < 0)
769 if (lseek64(to
, bitmap_offset
<<9, 0) < 0)
772 for (written
= 0; written
< bytes
; ) {
773 int n
= bytes
- written
;
776 if (aread(&afrom
, buf
, n
) != n
)
779 /* have the header, can calculate
780 * correct bitmap bytes */
783 bytes
= calc_bitmap_size(bms
, 512);
787 if (awrite(&ato
, buf
, n
) != n
)
793 if (super
.bblog_size
!= 0 &&
794 __le16_to_cpu(super
.bblog_size
) <= 100 &&
795 super
.bblog_offset
!= 0 &&
796 (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BAD_BLOCKS
))) {
797 /* There is a bad block log */
798 unsigned long long bb_offset
= sb_offset
;
799 int bytes
= __le16_to_cpu(super
.bblog_size
) * 512;
801 struct align_fd afrom
, ato
;
803 init_afd(&afrom
, from
);
806 bb_offset
+= (int32_t)__le32_to_cpu(super
.bblog_offset
);
808 if (lseek64(from
, bb_offset
<<9, 0) < 0)
810 if (lseek64(to
, bb_offset
<<9, 0) < 0)
813 for (written
= 0; written
< bytes
; ) {
814 int n
= bytes
- written
;
817 if (aread(&afrom
, buf
, n
) != n
)
820 if (awrite(&ato
, buf
, n
) != n
)
834 static void detail_super1(struct supertype
*st
, char *homehost
, char *subarray
)
836 struct mdp_superblock_1
*sb
= st
->sb
;
837 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char *)sb
) + MAX_SB_SIZE
);
839 int l
= homehost
? strlen(homehost
) : 0;
841 printf(" Name : %.32s", sb
->set_name
);
842 if (l
> 0 && l
< 32 && sb
->set_name
[l
] == ':' &&
843 strncmp(sb
->set_name
, homehost
, l
) == 0)
844 printf(" (local to host %s)", homehost
);
845 if (bms
->nodes
> 0 &&
846 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
))
847 printf("\n Cluster Name : %-64s", bms
->cluster_name
);
848 printf("\n UUID : ");
849 for (i
= 0; i
< 16; i
++) {
850 if ((i
& 3) == 0 && i
!= 0)
852 printf("%02x", sb
->set_uuid
[i
]);
854 printf("\n Events : %llu\n\n",
855 (unsigned long long)__le64_to_cpu(sb
->events
));
858 static void brief_detail_super1(struct supertype
*st
, char *subarray
)
860 struct mdp_superblock_1
*sb
= st
->sb
;
864 for (i
= 0; i
< 16; i
++) {
865 if ((i
& 3) == 0 && i
!= 0)
867 printf("%02x", sb
->set_uuid
[i
]);
871 static void export_detail_super1(struct supertype
*st
)
873 struct mdp_superblock_1
*sb
= st
->sb
;
877 for (i
= 0; i
< 32; i
++)
878 if (sb
->set_name
[i
] == '\n' || sb
->set_name
[i
] == '\0') {
883 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
886 static int examine_badblocks_super1(struct supertype
*st
, int fd
, char *devname
)
888 struct mdp_superblock_1
*sb
= st
->sb
;
889 unsigned long long offset
;
894 if (!sb
->bblog_size
|| __le16_to_cpu(sb
->bblog_size
) > 100 ||
896 printf("No bad-blocks list configured on %s\n", devname
);
899 if ((sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
)) == 0) {
900 printf("Bad-blocks list is empty in %s\n", devname
);
904 size
= __le16_to_cpu(sb
->bblog_size
)* 512;
905 if (posix_memalign((void **)&bbl
, 4096, size
) != 0) {
906 pr_err("could not allocate badblocks list\n");
909 offset
= __le64_to_cpu(sb
->super_offset
) +
910 (int)__le32_to_cpu(sb
->bblog_offset
);
912 if (lseek64(fd
, offset
, 0) < 0) {
913 pr_err("Cannot seek to bad-blocks list\n");
916 if (read(fd
, bbl
, size
) != size
) {
917 pr_err("Cannot read bad-blocks list\n");
920 /* 64bits per entry. 10 bits is block-count, 54 bits is block
921 * offset. Blocks are sectors unless bblog->shift makes them bigger
924 printf("Bad-blocks on %s:\n", devname
);
925 for (i
= 0; i
< size
/8; i
++, bbp
++) {
926 __u64 bb
= __le64_to_cpu(*bbp
);
927 int count
= bb
& 0x3ff;
928 unsigned long long sector
= bb
>> 10;
933 sector
<<= sb
->bblog_shift
;
934 count
<<= sb
->bblog_shift
;
936 printf("%20llu for %d sectors\n", sector
, count
);
941 static int match_home1(struct supertype
*st
, char *homehost
)
943 struct mdp_superblock_1
*sb
= st
->sb
;
944 int l
= homehost
? strlen(homehost
) : 0;
946 return (l
> 0 && l
< 32 && sb
->set_name
[l
] == ':' &&
947 strncmp(sb
->set_name
, homehost
, l
) == 0);
950 static void uuid_from_super1(struct supertype
*st
, int uuid
[4])
952 struct mdp_superblock_1
*super
= st
->sb
;
953 char *cuuid
= (char *)uuid
;
955 for (i
= 0; i
< 16; i
++)
956 cuuid
[i
] = super
->set_uuid
[i
];
959 static void getinfo_super1(struct supertype
*st
, struct mdinfo
*info
, char *map
)
961 struct mdp_superblock_1
*sb
= st
->sb
;
962 struct bitmap_super_s
*bsb
= (void *)(((char *)sb
) + MAX_SB_SIZE
);
963 struct misc_dev_info
*misc
=
964 (void *)(((char *)sb
) + MAX_SB_SIZE
+BM_SUPER_SIZE
);
968 unsigned int map_disks
= info
->array
.raid_disks
;
969 unsigned long long super_offset
;
970 unsigned long long data_size
;
972 memset(info
, 0, sizeof(*info
));
973 info
->array
.major_version
= 1;
974 info
->array
.minor_version
= st
->minor_version
;
975 info
->array
.patch_version
= 0;
976 info
->array
.raid_disks
= __le32_to_cpu(sb
->raid_disks
);
977 info
->array
.level
= __le32_to_cpu(sb
->level
);
978 info
->array
.layout
= __le32_to_cpu(sb
->layout
);
979 info
->array
.md_minor
= -1;
980 info
->array
.ctime
= __le64_to_cpu(sb
->ctime
);
981 info
->array
.utime
= __le64_to_cpu(sb
->utime
);
982 info
->array
.chunk_size
= __le32_to_cpu(sb
->chunksize
)*512;
984 (__le64_to_cpu(sb
->resync_offset
) == MaxSector
) ? 1 : 0;
986 super_offset
= __le64_to_cpu(sb
->super_offset
);
987 info
->data_offset
= __le64_to_cpu(sb
->data_offset
);
988 info
->component_size
= __le64_to_cpu(sb
->size
);
989 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
990 info
->bitmap_offset
= (int32_t)__le32_to_cpu(sb
->bitmap_offset
);
991 if (__le32_to_cpu(bsb
->nodes
) > 1)
992 info
->array
.state
|= (1 << MD_SB_CLUSTERED
);
993 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
994 info
->ppl_offset
= __le16_to_cpu(sb
->ppl
.offset
);
995 info
->ppl_size
= __le16_to_cpu(sb
->ppl
.size
);
996 info
->ppl_sector
= super_offset
+ info
->ppl_offset
;
999 info
->disk
.major
= 0;
1000 info
->disk
.minor
= 0;
1001 info
->disk
.number
= __le32_to_cpu(sb
->dev_number
);
1002 if (__le32_to_cpu(sb
->dev_number
) >= __le32_to_cpu(sb
->max_dev
) ||
1003 __le32_to_cpu(sb
->dev_number
) >= MAX_DEVS
)
1004 role
= MD_DISK_ROLE_FAULTY
;
1006 role
= __le16_to_cpu(sb
->dev_roles
[__le32_to_cpu(sb
->dev_number
)]);
1008 if (info
->array
.level
<= 0)
1009 data_size
= __le64_to_cpu(sb
->data_size
);
1011 data_size
= __le64_to_cpu(sb
->size
);
1012 if (info
->data_offset
< super_offset
) {
1013 unsigned long long end
;
1014 info
->space_before
= info
->data_offset
;
1017 if (sb
->bblog_offset
&& sb
->bblog_size
) {
1018 unsigned long long bboffset
= super_offset
;
1019 bboffset
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
1024 if (super_offset
+ info
->bitmap_offset
+ info
->ppl_offset
< end
)
1025 end
= super_offset
+ info
->bitmap_offset
+
1028 if (info
->data_offset
+ data_size
< end
)
1029 info
->space_after
= end
- data_size
- info
->data_offset
;
1031 info
->space_after
= 0;
1033 unsigned long long earliest
;
1034 earliest
= super_offset
+ (32+4)*2; /* match kernel */
1035 if (info
->bitmap_offset
> 0) {
1036 unsigned long long bmend
= info
->bitmap_offset
;
1037 unsigned long long size
= calc_bitmap_size(bsb
, 4096);
1040 if (bmend
> earliest
)
1042 } else if (info
->ppl_offset
> 0) {
1043 unsigned long long pplend
;
1045 pplend
= info
->ppl_offset
+ info
->ppl_size
;
1046 if (pplend
> earliest
)
1049 if (sb
->bblog_offset
&& sb
->bblog_size
) {
1050 unsigned long long bbend
= super_offset
;
1051 bbend
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
1052 bbend
+= __le16_to_cpu(sb
->bblog_size
);
1053 if (bbend
> earliest
)
1056 if (earliest
< info
->data_offset
)
1057 info
->space_before
= info
->data_offset
- earliest
;
1059 info
->space_before
= 0;
1060 info
->space_after
= misc
->device_size
- data_size
-
1063 if (info
->space_before
== 0 && info
->space_after
== 0) {
1064 /* It will look like we don't support data_offset changes,
1065 * be we do - it's just that there is no room.
1066 * A change that reduced the number of devices should
1067 * still be allowed, so set the otherwise useless value of '1'
1069 info
->space_after
= 1;
1072 info
->disk
.raid_disk
= -1;
1074 case MD_DISK_ROLE_SPARE
:
1075 /* spare: not active, not sync, not faulty */
1076 info
->disk
.state
= 0;
1078 case MD_DISK_ROLE_FAULTY
:
1079 info
->disk
.state
= (1 << MD_DISK_FAULTY
); /* faulty */
1081 case MD_DISK_ROLE_JOURNAL
:
1082 info
->disk
.state
= (1 << MD_DISK_JOURNAL
);
1083 info
->disk
.raid_disk
= role
;
1084 /* journal uses all 4kB blocks*/
1085 info
->space_after
= (misc
->device_size
- info
->data_offset
) % 8;
1088 info
->disk
.state
= 6; /* active and in sync */
1089 info
->disk
.raid_disk
= role
;
1091 if (sb
->devflags
& WriteMostly1
)
1092 info
->disk
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
1093 if (sb
->devflags
& FailFast1
)
1094 info
->disk
.state
|= (1 << MD_DISK_FAILFAST
);
1095 info
->events
= __le64_to_cpu(sb
->events
);
1096 sprintf(info
->text_version
, "1.%d", st
->minor_version
);
1097 info
->safe_mode_delay
= 200;
1099 memcpy(info
->uuid
, sb
->set_uuid
, 16);
1101 strncpy(info
->name
, sb
->set_name
, 32);
1104 if ((__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_REPLACEMENT
)) {
1105 info
->disk
.state
&= ~(1 << MD_DISK_SYNC
);
1106 info
->disk
.state
|= 1 << MD_DISK_REPLACEMENT
;
1109 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET
))
1110 info
->recovery_start
= __le32_to_cpu(sb
->recovery_offset
);
1112 info
->recovery_start
= MaxSector
;
1114 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
1115 info
->reshape_active
= 1;
1116 if ((sb
->feature_map
& __le32_to_cpu(MD_FEATURE_NEW_OFFSET
)) &&
1117 sb
->new_offset
!= 0)
1118 info
->reshape_active
|= RESHAPE_NO_BACKUP
;
1119 info
->reshape_progress
= __le64_to_cpu(sb
->reshape_position
);
1120 info
->new_level
= __le32_to_cpu(sb
->new_level
);
1121 info
->delta_disks
= __le32_to_cpu(sb
->delta_disks
);
1122 info
->new_layout
= __le32_to_cpu(sb
->new_layout
);
1123 info
->new_chunk
= __le32_to_cpu(sb
->new_chunk
)<<9;
1124 if (info
->delta_disks
< 0)
1125 info
->array
.raid_disks
-= info
->delta_disks
;
1127 info
->reshape_active
= 0;
1129 info
->recovery_blocked
= info
->reshape_active
;
1132 for (i
= 0; i
< map_disks
; i
++)
1134 for (i
= 0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
1135 role
= __le16_to_cpu(sb
->dev_roles
[i
]);
1136 if (/*role == MD_DISK_ROLE_SPARE || */role
< (unsigned) info
->array
.raid_disks
) {
1138 if (map
&& role
< map_disks
)
1143 info
->array
.working_disks
= working
;
1145 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_JOURNAL
)) {
1146 info
->journal_device_required
= 1;
1147 info
->consistency_policy
= CONSISTENCY_POLICY_JOURNAL
;
1148 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
1149 info
->consistency_policy
= CONSISTENCY_POLICY_PPL
;
1150 } else if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
1151 info
->consistency_policy
= CONSISTENCY_POLICY_BITMAP
;
1152 } else if (info
->array
.level
<= 0) {
1153 info
->consistency_policy
= CONSISTENCY_POLICY_NONE
;
1155 info
->consistency_policy
= CONSISTENCY_POLICY_RESYNC
;
1158 info
->journal_clean
= 0;
1161 static struct mdinfo
*container_content1(struct supertype
*st
, char *subarray
)
1163 struct mdinfo
*info
;
1168 info
= xmalloc(sizeof(*info
));
1169 getinfo_super1(st
, info
, NULL
);
1173 static int update_super1(struct supertype
*st
, struct mdinfo
*info
,
1174 enum update_opt update
, char *devname
, int verbose
,
1175 int uuid_set
, char *homehost
)
1177 /* NOTE: for 'assemble' and 'force' we need to return non-zero
1178 * if any change was made. For others, the return value is
1182 struct mdp_superblock_1
*sb
= st
->sb
;
1183 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char *)sb
) + MAX_SB_SIZE
);
1185 if (update
== UOPT_HOMEHOST
&& homehost
) {
1187 * Note that 'homehost' is special as it is really
1192 c
= strchr(sb
->set_name
, ':');
1194 snprintf(info
->name
, sizeof(info
->name
), "%s", c
+ 1);
1196 snprintf(info
->name
, sizeof(info
->name
), "%s",
1205 snprintf(info
->name
, sizeof(info
->name
), "%d", info
->array
.md_minor
);
1206 memset(sb
->set_name
, 0, sizeof(sb
->set_name
));
1208 namelen
= strnlen(homehost
, MD_NAME_MAX
) + 1 + strnlen(info
->name
, MD_NAME_MAX
);
1210 strchr(info
->name
, ':') == NULL
&&
1211 namelen
< MD_NAME_MAX
) {
1212 strcpy(sb
->set_name
, homehost
);
1213 strcat(sb
->set_name
, ":");
1214 strcat(sb
->set_name
, info
->name
);
1216 namelen
= min((int)strnlen(info
->name
, MD_NAME_MAX
),
1217 (int)sizeof(sb
->set_name
) - 1);
1218 memcpy(sb
->set_name
, info
->name
, namelen
);
1219 memset(&sb
->set_name
[namelen
], '\0',
1220 sizeof(sb
->set_name
) - namelen
);
1224 case UOPT_SPEC_FORCE_ONE
:
1225 /* Not enough devices for a working array,
1226 * so bring this one up-to-date
1228 if (sb
->events
!= __cpu_to_le64(info
->events
))
1230 sb
->events
= __cpu_to_le64(info
->events
);
1232 case UOPT_SPEC_FORCE_ARRAY
:
1233 /* Degraded array and 'force' requests to
1234 * maybe need to mark it 'clean'.
1236 switch(__le32_to_cpu(sb
->level
)) {
1240 /* need to force clean */
1241 if (sb
->resync_offset
!= MaxSector
)
1243 sb
->resync_offset
= MaxSector
;
1246 case UOPT_SPEC_ASSEMBLE
: {
1247 int d
= info
->disk
.number
;
1249 if (info
->disk
.state
& (1<<MD_DISK_ACTIVE
))
1250 want
= info
->disk
.raid_disk
;
1251 else if (info
->disk
.state
& (1<<MD_DISK_JOURNAL
))
1252 want
= MD_DISK_ROLE_JOURNAL
;
1254 want
= MD_DISK_ROLE_SPARE
;
1255 if (sb
->dev_roles
[d
] != __cpu_to_le16(want
)) {
1256 sb
->dev_roles
[d
] = __cpu_to_le16(want
);
1259 if (info
->reshape_active
&&
1261 __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1262 info
->delta_disks
>= 0 &&
1263 info
->reshape_progress
<
1264 __le64_to_cpu(sb
->reshape_position
)) {
1265 sb
->reshape_position
=
1266 __cpu_to_le64(info
->reshape_progress
);
1269 if (info
->reshape_active
&&
1271 __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1272 info
->delta_disks
< 0 &&
1273 info
->reshape_progress
>
1274 __le64_to_cpu(sb
->reshape_position
)) {
1275 sb
->reshape_position
=
1276 __cpu_to_le64(info
->reshape_progress
);
1281 case UOPT_SPEC_LINEAR_GROW_NEW
: {
1284 int max
= __le32_to_cpu(sb
->max_dev
);
1289 for (i
= 0; i
< max
; i
++)
1290 if (__le16_to_cpu(sb
->dev_roles
[i
]) >=
1291 MD_DISK_ROLE_FAULTY
)
1293 if (i
!= info
->disk
.number
)
1295 sb
->dev_number
= __cpu_to_le32(i
);
1298 sb
->max_dev
= __cpu_to_le32(max
+ 1);
1302 random_uuid(sb
->device_uuid
);
1304 sb
->dev_roles
[i
] = __cpu_to_le16(info
->disk
.raid_disk
);
1306 fd
= open(devname
, O_RDONLY
);
1308 unsigned long long ds
;
1309 get_dev_size(fd
, devname
, &ds
);
1312 if (__le64_to_cpu(sb
->super_offset
) <
1313 __le64_to_cpu(sb
->data_offset
)) {
1314 sb
->data_size
= __cpu_to_le64(
1315 ds
- __le64_to_cpu(sb
->data_offset
));
1318 ds
&= ~(unsigned long long)(4 * 2 - 1);
1319 sb
->super_offset
= __cpu_to_le64(ds
);
1320 sb
->data_size
= __cpu_to_le64(
1321 ds
- __le64_to_cpu(sb
->data_offset
));
1326 case UOPT_SPEC_LINEAR_GROW_UPDATE
: {
1327 int max
= __le32_to_cpu(sb
->max_dev
);
1328 int i
= info
->disk
.number
;
1329 if (max
> MAX_DEVS
|| i
> MAX_DEVS
)
1334 sb
->max_dev
= __cpu_to_le32(max
+ 1);
1335 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
1336 sb
->dev_roles
[info
->disk
.number
] =
1337 __cpu_to_le16(info
->disk
.raid_disk
);
1341 /* make sure resync happens */
1342 sb
->resync_offset
= 0;
1345 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
1347 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
)
1348 memcpy(bms
->uuid
, sb
->set_uuid
, 16);
1350 case UOPT_NO_BITMAP
:
1351 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
);
1352 if (bms
->version
== BITMAP_MAJOR_CLUSTERED
&& !IsBitmapDirty(devname
))
1353 sb
->resync_offset
= MaxSector
;
1356 /* only possible if there is room after the bitmap, or if
1357 * there is no bitmap
1359 unsigned long long sb_offset
= __le64_to_cpu(sb
->super_offset
);
1360 unsigned long long data_offset
= __le64_to_cpu(sb
->data_offset
);
1361 long bitmap_offset
= 0;
1362 long bm_sectors
= 0;
1365 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1366 bitmap_offset
= (long)__le32_to_cpu(sb
->bitmap_offset
);
1367 bm_sectors
= calc_bitmap_size(bms
, 4096) >> 9;
1368 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
1369 bitmap_offset
= (long)__le16_to_cpu(sb
->ppl
.offset
);
1370 bm_sectors
= (long)__le16_to_cpu(sb
->ppl
.size
);
1373 if (sb_offset
< data_offset
) {
1375 * 1.1 or 1.2. Put bbl after bitmap leaving
1379 bb_offset
= sb_offset
+ 8;
1380 if (bm_sectors
&& bitmap_offset
> 0)
1381 bb_offset
= bitmap_offset
+ bm_sectors
;
1382 while (bb_offset
< (long)sb_offset
+ 8 + 32*2 &&
1383 bb_offset
+ 8+8 <= (long)data_offset
)
1385 if (bb_offset
+ 8 <= (long)data_offset
) {
1386 sb
->bblog_size
= __cpu_to_le16(8);
1387 sb
->bblog_offset
= __cpu_to_le32(bb_offset
);
1390 if (bm_sectors
&& bitmap_offset
< 0)
1391 space
= -bitmap_offset
- bm_sectors
;
1393 space
= sb_offset
- data_offset
-
1394 __le64_to_cpu(sb
->data_size
);
1396 sb
->bblog_size
= __cpu_to_le16(8);
1397 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1403 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
1404 pr_err("Cannot remove active bbl from %s\n",devname
);
1407 sb
->bblog_shift
= 0;
1408 sb
->bblog_offset
= 0;
1411 case UOPT_FORCE_NO_BBL
:
1412 sb
->feature_map
&= ~ __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
);
1414 sb
->bblog_shift
= 0;
1415 sb
->bblog_offset
= 0;
1418 unsigned long long sb_offset
= __le64_to_cpu(sb
->super_offset
);
1419 unsigned long long data_offset
= __le64_to_cpu(sb
->data_offset
);
1420 unsigned long long data_size
= __le64_to_cpu(sb
->data_size
);
1421 long bb_offset
= __le32_to_cpu(sb
->bblog_offset
);
1425 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1426 pr_err("Cannot add PPL to array with bitmap\n");
1430 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_JOURNAL
)) {
1431 pr_err("Cannot add PPL to array with journal\n");
1435 if (sb_offset
< data_offset
) {
1437 space
= bb_offset
- 8;
1439 space
= data_offset
- sb_offset
- 8;
1442 offset
= -(sb_offset
- data_offset
- data_size
);
1443 if (offset
< INT16_MIN
)
1445 space
= -(offset
- bb_offset
);
1448 if (space
< (PPL_HEADER_SIZE
>> 9) + 8) {
1449 pr_err("Not enough space to add ppl\n");
1453 if (space
>= (MULTIPLE_PPL_AREA_SIZE_SUPER1
>> 9)) {
1454 space
= (MULTIPLE_PPL_AREA_SIZE_SUPER1
>> 9);
1456 int optimal_space
= choose_ppl_space(
1457 __le32_to_cpu(sb
->chunksize
));
1458 if (space
> optimal_space
)
1459 space
= optimal_space
;
1460 if (space
> UINT16_MAX
)
1464 sb
->ppl
.offset
= __cpu_to_le16(offset
);
1465 sb
->ppl
.size
= __cpu_to_le16(space
);
1466 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_PPL
);
1470 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_PPL
|
1471 MD_FEATURE_MUTLIPLE_PPLS
);
1473 case UOPT_DEVICESIZE
:
1474 if (__le64_to_cpu(sb
->super_offset
) >=
1475 __le64_to_cpu(sb
->data_offset
))
1478 * set data_size to device size less data_offset
1480 struct misc_dev_info
*misc
= (struct misc_dev_info
*)
1481 (st
->sb
+ MAX_SB_SIZE
+ BM_SUPER_SIZE
);
1482 sb
->data_size
= __cpu_to_le64(
1483 misc
->device_size
- __le64_to_cpu(sb
->data_offset
));
1485 case UOPT_SPEC_REVERT_RESHAPE_NOBACKUP
:
1486 case UOPT_REVERT_RESHAPE
:
1488 if (!(sb
->feature_map
&
1489 __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)))
1490 pr_err("No active reshape to revert on %s\n",
1494 unsigned long long reshape_sectors
;
1497 /* If the reshape hasn't started, just stop it.
1498 * It is conceivable that a stripe was modified but
1499 * the metadata not updated. In that case the backup
1500 * should have been used to get passed the critical stage.
1501 * If that couldn't happen, the "-nobackup" version
1504 if (update
== UOPT_SPEC_REVERT_RESHAPE_NOBACKUP
&&
1505 sb
->reshape_position
== 0 &&
1506 (__le32_to_cpu(sb
->delta_disks
) > 0 ||
1507 (__le32_to_cpu(sb
->delta_disks
) == 0 &&
1508 !(sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS
))))) {
1509 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
);
1510 sb
->raid_disks
= __cpu_to_le32(__le32_to_cpu(sb
->raid_disks
) -
1511 __le32_to_cpu(sb
->delta_disks
));
1512 sb
->delta_disks
= 0;
1515 /* reshape_position is a little messy.
1516 * Its value must be a multiple of the larger
1517 * chunk size, and of the "after" data disks.
1518 * So when reverting we need to change it to
1519 * be a multiple of the new "after" data disks,
1520 * which is the old "before".
1521 * If it isn't already a multiple of 'before',
1522 * the only thing we could do would be
1523 * copy some block around on the disks, which
1524 * is easy to get wrong.
1525 * So we reject a revert-reshape unless the
1526 * alignment is good.
1528 if (is_level456(__le32_to_cpu(sb
->level
))) {
1530 __le64_to_cpu(sb
->reshape_position
);
1531 reshape_chunk
= __le32_to_cpu(sb
->new_chunk
);
1532 reshape_chunk
*= __le32_to_cpu(sb
->raid_disks
) -
1533 __le32_to_cpu(sb
->delta_disks
) -
1534 (__le32_to_cpu(sb
->level
)==6 ? 2 : 1);
1535 if (reshape_sectors
% reshape_chunk
) {
1536 pr_err("Reshape position is not suitably aligned.\n");
1537 pr_err("Try normal assembly and stop again\n");
1542 __cpu_to_le32(__le32_to_cpu(sb
->raid_disks
) -
1543 __le32_to_cpu(sb
->delta_disks
));
1544 if (sb
->delta_disks
== 0)
1545 sb
->feature_map
^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS
);
1547 sb
->delta_disks
= __cpu_to_le32(-__le32_to_cpu(sb
->delta_disks
));
1549 temp
= sb
->new_layout
;
1550 sb
->new_layout
= sb
->layout
;
1553 temp
= sb
->new_chunk
;
1554 sb
->new_chunk
= sb
->chunksize
;
1555 sb
->chunksize
= temp
;
1557 if (sb
->feature_map
&
1558 __cpu_to_le32(MD_FEATURE_NEW_OFFSET
)) {
1560 (int32_t)__le32_to_cpu(sb
->new_offset
);
1561 sb
->data_offset
= __cpu_to_le64(__le64_to_cpu(sb
->data_offset
) + offset_delta
);
1562 sb
->new_offset
= __cpu_to_le32(-offset_delta
);
1563 sb
->data_size
= __cpu_to_le64(__le64_to_cpu(sb
->data_size
) - offset_delta
);
1568 case UOPT_SPEC__RESHAPE_PROGRESS
:
1569 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1571 case UOPT_SPEC_WRITEMOSTLY
:
1572 sb
->devflags
|= WriteMostly1
;
1574 case UOPT_SPEC_READWRITE
:
1575 sb
->devflags
&= ~WriteMostly1
;
1577 case UOPT_SPEC_FAILFAST
:
1578 sb
->devflags
|= FailFast1
;
1580 case UOPT_SPEC_NOFAILFAST
:
1581 sb
->devflags
&= ~FailFast1
;
1583 case UOPT_LAYOUT_ORIGINAL
:
1584 case UOPT_LAYOUT_ALTERNATE
:
1585 case UOPT_LAYOUT_UNSPECIFIED
:
1586 if (__le32_to_cpu(sb
->level
) != 0) {
1587 pr_err("%s: %s only supported for RAID0\n",
1588 devname
?: "", map_num(update_options
, update
));
1590 } else if (update
== UOPT_LAYOUT_UNSPECIFIED
) {
1591 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_RAID0_LAYOUT
);
1594 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT
);
1595 sb
->layout
= __cpu_to_le32(update
== UOPT_LAYOUT_ORIGINAL
? 1 : 2);
1602 sb
->sb_csum
= calc_sb_1_csum(sb
);
1607 static int init_super1(struct supertype
*st
, mdu_array_info_t
*info
,
1608 struct shape
*s
, char *name
, char *homehost
,
1609 int *uuid
, unsigned long long data_offset
)
1611 struct mdp_superblock_1
*sb
;
1616 if (posix_memalign((void **)&sb
, 4096, SUPER1_SIZE
) != 0) {
1617 pr_err("could not allocate superblock\n");
1620 memset(sb
, 0, SUPER1_SIZE
);
1624 /* zeroing superblock */
1628 spares
= info
->working_disks
- info
->active_disks
;
1629 if (info
->raid_disks
+ spares
> MAX_DEVS
) {
1630 pr_err("too many devices requested: %d+%d > %d\n",
1631 info
->raid_disks
, spares
, MAX_DEVS
);
1635 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
1636 sb
->major_version
= __cpu_to_le32(1);
1637 sb
->feature_map
= 0;
1641 copy_uuid(sb
->set_uuid
, uuid
, super1
.swapuuid
);
1643 random_uuid(sb
->set_uuid
);;
1645 if (name
== NULL
|| *name
== 0) {
1646 sprintf(defname
, "%d", info
->md_minor
);
1650 strchr(name
, ':') == NULL
&&
1651 strlen(homehost
) + 1 + strlen(name
) < 32) {
1652 strcpy(sb
->set_name
, homehost
);
1653 strcat(sb
->set_name
, ":");
1654 strcat(sb
->set_name
, name
);
1658 namelen
= min((int)strlen(name
),
1659 (int)sizeof(sb
->set_name
) - 1);
1660 memcpy(sb
->set_name
, name
, namelen
);
1661 memset(&sb
->set_name
[namelen
], '\0',
1662 sizeof(sb
->set_name
) - namelen
);
1665 sb
->ctime
= __cpu_to_le64((unsigned long long)time(0));
1666 sb
->level
= __cpu_to_le32(info
->level
);
1667 sb
->layout
= __cpu_to_le32(info
->layout
);
1668 sb
->size
= __cpu_to_le64(s
->size
*2ULL);
1669 sb
->chunksize
= __cpu_to_le32(info
->chunk_size
>>9);
1670 sb
->raid_disks
= __cpu_to_le32(info
->raid_disks
);
1672 sb
->data_offset
= __cpu_to_le64(data_offset
);
1673 sb
->data_size
= __cpu_to_le64(0);
1674 sb
->super_offset
= __cpu_to_le64(0);
1675 sb
->recovery_offset
= __cpu_to_le64(0);
1677 sb
->utime
= sb
->ctime
;
1678 sb
->events
= __cpu_to_le64(1);
1679 if (info
->state
& (1<<MD_SB_CLEAN
))
1680 sb
->resync_offset
= MaxSector
;
1682 sb
->resync_offset
= 0;
1683 sbsize
= sizeof(struct mdp_superblock_1
) +
1684 2 * (info
->raid_disks
+ spares
);
1685 sbsize
= ROUND_UP(sbsize
, 512);
1687 __cpu_to_le32((sbsize
- sizeof(struct mdp_superblock_1
)) / 2);
1689 memset(sb
->dev_roles
, 0xff,
1690 MAX_SB_SIZE
- sizeof(struct mdp_superblock_1
));
1692 if (s
->consistency_policy
== CONSISTENCY_POLICY_PPL
)
1693 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_PPL
);
1701 long long data_offset
;
1702 unsigned long long dev_size
;
1703 mdu_disk_info_t disk
;
1704 struct devinfo
*next
;
1707 /* Add a device to the superblock being created */
1708 static int add_to_super1(struct supertype
*st
, mdu_disk_info_t
*dk
,
1709 int fd
, char *devname
, unsigned long long data_offset
)
1711 struct mdp_superblock_1
*sb
= st
->sb
;
1712 __u16
*rp
= sb
->dev_roles
+ dk
->number
;
1713 struct devinfo
*di
, **dip
;
1716 dk_state
= dk
->state
& ~(1<<MD_DISK_FAILFAST
);
1717 if ((dk_state
& (1<<MD_DISK_ACTIVE
)) &&
1718 (dk_state
& (1<<MD_DISK_SYNC
)))/* active, sync */
1719 *rp
= __cpu_to_le16(dk
->raid_disk
);
1720 else if (dk_state
& (1<<MD_DISK_JOURNAL
))
1721 *rp
= MD_DISK_ROLE_JOURNAL
;
1722 else if ((dk_state
& ~(1<<MD_DISK_ACTIVE
)) == 0)
1723 /* active or idle -> spare */
1724 *rp
= MD_DISK_ROLE_SPARE
;
1726 *rp
= MD_DISK_ROLE_FAULTY
;
1728 if (dk
->number
>= (int)__le32_to_cpu(sb
->max_dev
) &&
1729 __le32_to_cpu(sb
->max_dev
) < MAX_DEVS
)
1730 sb
->max_dev
= __cpu_to_le32(dk
->number
+ 1);
1732 sb
->dev_number
= __cpu_to_le32(dk
->number
);
1733 sb
->devflags
= 0; /* don't copy another disks flags */
1734 sb
->sb_csum
= calc_sb_1_csum(sb
);
1736 dip
= (struct devinfo
**)&st
->info
;
1738 dip
= &(*dip
)->next
;
1739 di
= xmalloc(sizeof(struct devinfo
));
1741 di
->devname
= devname
;
1743 di
->data_offset
= data_offset
;
1745 if (is_fd_valid(fd
))
1746 get_dev_size(fd
, NULL
, &di
->dev_size
);
1754 static int locate_bitmap1(struct supertype
*st
, int fd
, int node_num
);
1756 static int store_super1(struct supertype
*st
, int fd
)
1758 struct mdp_superblock_1
*sb
= st
->sb
;
1759 unsigned long long sb_offset
;
1760 struct align_fd afd
;
1762 unsigned long long dsize
;
1764 if (!get_dev_size(fd
, NULL
, &dsize
))
1775 * Calculate the position of the superblock.
1776 * It is always aligned to a 4K boundary and
1777 * depending on minor_version, it can be:
1778 * 0: At least 8K, but less than 12K, from end of device
1779 * 1: At start of device
1780 * 2: 4K from start of device.
1782 switch(st
->minor_version
) {
1786 sb_offset
&= ~(4*2-1);
1798 if (sb_offset
!= __le64_to_cpu(sb
->super_offset
) &&
1799 0 != __le64_to_cpu(sb
->super_offset
)
1801 pr_err("internal error - sb_offset is wrong\n");
1805 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL)
1808 sbsize
= ROUND_UP(sizeof(*sb
) + 2 * __le32_to_cpu(sb
->max_dev
), 512);
1810 if (awrite(&afd
, sb
, sbsize
) != sbsize
)
1813 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1814 struct bitmap_super_s
*bm
;
1815 bm
= (struct bitmap_super_s
*)(((char *)sb
) + MAX_SB_SIZE
);
1816 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
) {
1817 locate_bitmap1(st
, fd
, 0);
1818 if (awrite(&afd
, bm
, sizeof(*bm
)) != sizeof(*bm
))
1827 static int load_super1(struct supertype
*st
, int fd
, char *devname
);
1829 static unsigned long choose_bm_space(unsigned long devsize
)
1831 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
1832 * if bigger than 200Gig, save 128k
1833 * NOTE: result must be multiple of 4K else bad things happen
1834 * on 4K-sector devices.
1838 if (devsize
- 64*2 >= 200*1024*1024*2)
1840 if (devsize
- 4*2 > 8*1024*1024*2)
1845 static void free_super1(struct supertype
*st
);
1847 __u32
crc32c_le(__u32 crc
, unsigned char const *p
, size_t len
);
1849 static int write_init_ppl1(struct supertype
*st
, struct mdinfo
*info
, int fd
)
1851 struct mdp_superblock_1
*sb
= st
->sb
;
1853 struct ppl_header
*ppl_hdr
;
1856 /* first clear entire ppl space */
1857 ret
= zero_disk_range(fd
, info
->ppl_sector
, info
->ppl_size
);
1861 ret
= posix_memalign(&buf
, 4096, PPL_HEADER_SIZE
);
1863 pr_err("Failed to allocate PPL header buffer\n");
1867 memset(buf
, 0, PPL_HEADER_SIZE
);
1869 memset(ppl_hdr
->reserved
, 0xff, PPL_HDR_RESERVED
);
1870 ppl_hdr
->signature
= __cpu_to_le32(~crc32c_le(~0, sb
->set_uuid
,
1871 sizeof(sb
->set_uuid
)));
1872 ppl_hdr
->checksum
= __cpu_to_le32(~crc32c_le(~0, buf
, PPL_HEADER_SIZE
));
1874 if (lseek64(fd
, info
->ppl_sector
* 512, SEEK_SET
) < 0) {
1876 perror("Failed to seek to PPL header location");
1879 if (!ret
&& write(fd
, buf
, PPL_HEADER_SIZE
) != PPL_HEADER_SIZE
) {
1881 perror("Write PPL header failed");
1891 #define META_BLOCK_SIZE 4096
1893 static int write_empty_r5l_meta_block(struct supertype
*st
, int fd
)
1895 struct r5l_meta_block
*mb
;
1896 struct mdp_superblock_1
*sb
= st
->sb
;
1897 struct align_fd afd
;
1902 if (posix_memalign((void **)&mb
, 4096, META_BLOCK_SIZE
) != 0) {
1903 pr_err("Could not allocate memory for the meta block.\n");
1907 memset(mb
, 0, META_BLOCK_SIZE
);
1909 mb
->magic
= __cpu_to_le32(R5LOG_MAGIC
);
1910 mb
->version
= R5LOG_VERSION
;
1911 mb
->meta_size
= __cpu_to_le32(sizeof(struct r5l_meta_block
));
1912 mb
->seq
= __cpu_to_le64(random32());
1913 mb
->position
= __cpu_to_le64(0);
1915 crc
= crc32c_le(0xffffffff, sb
->set_uuid
, sizeof(sb
->set_uuid
));
1916 crc
= crc32c_le(crc
, (void *)mb
, META_BLOCK_SIZE
);
1919 if (lseek64(fd
, __le64_to_cpu(sb
->data_offset
) * 512, 0) < 0LL) {
1920 pr_err("cannot seek to offset of the meta block\n");
1924 if (awrite(&afd
, mb
, META_BLOCK_SIZE
) != META_BLOCK_SIZE
) {
1925 pr_err("failed to store write the meta block \n");
1938 static bool has_raid0_layout(struct mdp_superblock_1
*sb
)
1940 if (sb
->level
== 0 && sb
->layout
!= 0)
1946 static int write_init_super1(struct supertype
*st
)
1948 struct mdp_superblock_1
*sb
= st
->sb
;
1949 struct supertype
*refst
;
1951 unsigned long long bm_space
;
1953 unsigned long long dsize
, array_size
;
1954 unsigned long long sb_offset
;
1955 unsigned long long data_offset
;
1957 bool raid0_need_layout
= false;
1959 /* Since linux kernel v5.4, raid0 always has a layout */
1960 if (has_raid0_layout(sb
) && get_linux_version() >= 5004000)
1961 raid0_need_layout
= true;
1963 for (di
= st
->info
; di
; di
= di
->next
) {
1964 if (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))
1965 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_JOURNAL
);
1966 if (has_raid0_layout(sb
) && !raid0_need_layout
) {
1968 struct devinfo
*di2
= st
->info
;
1969 unsigned long long s1
, s2
;
1971 if (di
->data_offset
!= INVALID_SECTORS
)
1972 s1
-= di
->data_offset
;
1973 s1
/= __le32_to_cpu(sb
->chunksize
);
1975 if (di2
->data_offset
!= INVALID_SECTORS
)
1976 s2
-= di2
->data_offset
;
1977 s2
/= __le32_to_cpu(sb
->chunksize
);
1979 raid0_need_layout
= true;
1983 for (di
= st
->info
; di
; di
= di
->next
) {
1984 if (di
->disk
.state
& (1 << MD_DISK_FAULTY
))
1989 while (Kill(di
->devname
, NULL
, 0, -1, 1) == 0)
1992 sb
->dev_number
= __cpu_to_le32(di
->disk
.number
);
1993 if (di
->disk
.state
& (1<<MD_DISK_WRITEMOSTLY
))
1994 sb
->devflags
|= WriteMostly1
;
1996 sb
->devflags
&= ~WriteMostly1
;
1997 if (di
->disk
.state
& (1<<MD_DISK_FAILFAST
))
1998 sb
->devflags
|= FailFast1
;
2000 sb
->devflags
&= ~FailFast1
;
2002 random_uuid(sb
->device_uuid
);
2004 if (!(di
->disk
.state
& (1<<MD_DISK_JOURNAL
)))
2007 refst
= dup_super(st
);
2008 if (load_super1(refst
, di
->fd
, NULL
)==0) {
2009 struct mdp_superblock_1
*refsb
= refst
->sb
;
2011 memcpy(sb
->device_uuid
, refsb
->device_uuid
, 16);
2012 if (memcmp(sb
->set_uuid
, refsb
->set_uuid
, 16)==0) {
2013 /* same array, so preserve events and
2015 sb
->events
= refsb
->events
;
2021 if (!get_dev_size(di
->fd
, NULL
, &dsize
)) {
2034 * Calculate the position of the superblock.
2035 * It is always aligned to a 4K boundary and
2036 * depending on minor_version, it can be:
2037 * 0: At least 8K, but less than 12K, from end of device
2038 * 1: At start of device
2039 * 2: 4K from start of device.
2040 * data_offset has already been set.
2042 array_size
= __le64_to_cpu(sb
->size
);
2044 /* work out how much space we left for a bitmap */
2045 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
2046 bitmap_super_t
*bms
= (bitmap_super_t
*)
2047 (((char *)sb
) + MAX_SB_SIZE
);
2048 bm_space
= calc_bitmap_size(bms
, 4096) >> 9;
2049 bm_offset
= (long)__le32_to_cpu(sb
->bitmap_offset
);
2050 } else if (md_feature_any_ppl_on(sb
->feature_map
)) {
2051 bm_space
= MULTIPLE_PPL_AREA_SIZE_SUPER1
>> 9;
2052 if (st
->minor_version
== 0)
2053 bm_offset
= -bm_space
- 8;
2056 sb
->ppl
.offset
= __cpu_to_le16(bm_offset
);
2057 sb
->ppl
.size
= __cpu_to_le16(bm_space
);
2059 bm_space
= choose_bm_space(array_size
);
2063 data_offset
= di
->data_offset
;
2064 if (data_offset
== INVALID_SECTORS
)
2065 data_offset
= st
->data_offset
;
2066 switch(st
->minor_version
) {
2068 /* Add 8 sectors for bad block log */
2070 if (data_offset
== INVALID_SECTORS
)
2074 sb_offset
&= ~(4*2-1);
2075 sb
->data_offset
= __cpu_to_le64(data_offset
);
2076 sb
->super_offset
= __cpu_to_le64(sb_offset
);
2077 if (sb_offset
< array_size
+ bm_space
)
2078 bm_space
= sb_offset
- array_size
;
2079 sb
->data_size
= __cpu_to_le64(sb_offset
- bm_space
);
2080 if (bm_space
>= 8) {
2081 sb
->bblog_size
= __cpu_to_le16(8);
2082 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
2087 sb_offset
= st
->minor_version
== 2 ? 8 : 0;
2088 sb
->super_offset
= __cpu_to_le64(sb_offset
);
2089 if (data_offset
== INVALID_SECTORS
)
2090 data_offset
= sb_offset
+ 16;
2092 sb
->data_offset
= __cpu_to_le64(data_offset
);
2093 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
2094 if (data_offset
>= sb_offset
+bm_offset
+bm_space
+8) {
2095 sb
->bblog_size
= __cpu_to_le16(8);
2096 sb
->bblog_offset
= __cpu_to_le32(bm_offset
+
2098 } else if (data_offset
>= sb_offset
+ 16) {
2099 sb
->bblog_size
= __cpu_to_le16(8);
2100 /* '8' sectors for the bblog, and 'sb_offset'
2101 * because we want offset from superblock, not
2104 sb
->bblog_offset
= __cpu_to_le32(data_offset
-
2109 pr_err("Failed to write invalid metadata format 1.%i to %s\n",
2110 st
->minor_version
, di
->devname
);
2115 * Disable badblock log on clusters, or when
2116 * explicitly requested
2118 if (st
->nodes
> 0 || conf_get_create_info()->bblist
== 0) {
2120 sb
->bblog_offset
= 0;
2123 /* RAID0 needs a layout if devices aren't all the same size */
2124 if (raid0_need_layout
)
2125 sb
->feature_map
|= __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT
);
2127 sb
->sb_csum
= calc_sb_1_csum(sb
);
2128 rv
= store_super1(st
, di
->fd
);
2130 if (rv
== 0 && (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))) {
2131 rv
= write_empty_r5l_meta_block(st
, di
->fd
);
2137 (__le32_to_cpu(sb
->feature_map
) &
2138 MD_FEATURE_BITMAP_OFFSET
)) {
2139 rv
= st
->ss
->write_bitmap(st
, di
->fd
, NodeNumUpdate
);
2140 } else if (rv
== 0 &&
2141 md_feature_any_ppl_on(sb
->feature_map
)) {
2144 st
->ss
->getinfo_super(st
, &info
, NULL
);
2145 rv
= st
->ss
->write_init_ppl(st
, &info
, di
->fd
);
2155 pr_err("Failed to write metadata to %s\n", di
->devname
);
2160 static int compare_super1(struct supertype
*st
, struct supertype
*tst
,
2165 * 0 same, or first was empty, and second was copied
2166 * 1 second had wrong number
2168 * 3 wrong other info
2170 struct mdp_superblock_1
*first
= st
->sb
;
2171 struct mdp_superblock_1
*second
= tst
->sb
;
2173 if (second
->magic
!= __cpu_to_le32(MD_SB_MAGIC
))
2175 if (second
->major_version
!= __cpu_to_le32(1))
2179 if (posix_memalign((void **)&first
, 4096, SUPER1_SIZE
) != 0) {
2180 pr_err("could not allocate superblock\n");
2183 memcpy(first
, second
, SUPER1_SIZE
);
2187 if (memcmp(first
->set_uuid
, second
->set_uuid
, 16)!= 0)
2190 if (first
->ctime
!= second
->ctime
||
2191 first
->level
!= second
->level
||
2192 first
->layout
!= second
->layout
||
2193 first
->size
!= second
->size
||
2194 first
->chunksize
!= second
->chunksize
||
2195 first
->raid_disks
!= second
->raid_disks
)
2200 static int load_super1(struct supertype
*st
, int fd
, char *devname
)
2202 unsigned long long dsize
;
2203 unsigned long long sb_offset
;
2204 struct mdp_superblock_1
*super
;
2206 struct bitmap_super_s
*bsb
;
2207 struct misc_dev_info
*misc
;
2208 struct align_fd afd
;
2214 if (st
->ss
== NULL
|| st
->minor_version
== -1) {
2216 struct supertype tst
;
2217 __u64 bestctime
= 0;
2218 /* guess... choose latest ctime */
2219 memset(&tst
, 0, sizeof(tst
));
2221 for (tst
.minor_version
= 0; tst
.minor_version
<= 2;
2222 tst
.minor_version
++) {
2223 tst
.ignore_hw_compat
= st
->ignore_hw_compat
;
2224 switch(load_super1(&tst
, fd
, devname
)) {
2225 case 0: super
= tst
.sb
;
2226 if (bestvers
== -1 ||
2227 bestctime
< __le64_to_cpu(super
->ctime
)) {
2228 bestvers
= tst
.minor_version
;
2229 bestctime
= __le64_to_cpu(super
->ctime
);
2234 case 1: return 1; /*bad device */
2235 case 2: break; /* bad, try next */
2238 if (bestvers
!= -1) {
2240 tst
.minor_version
= bestvers
;
2242 tst
.max_devs
= MAX_DEVS
;
2243 rv
= load_super1(&tst
, fd
, devname
);
2250 if (!get_dev_size(fd
, devname
, &dsize
))
2256 pr_err("%s is too small for md: size is %llu sectors.\n",
2262 * Calculate the position of the superblock.
2263 * It is always aligned to a 4K boundary and
2264 * depending on minor_version, it can be:
2265 * 0: At least 8K, but less than 12K, from end of device
2266 * 1: At start of device
2267 * 2: 4K from start of device.
2269 switch(st
->minor_version
) {
2273 sb_offset
&= ~(4*2-1);
2285 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL) {
2287 pr_err("Cannot seek to superblock on %s: %s\n",
2288 devname
, strerror(errno
));
2292 if (posix_memalign((void **)&super
, 4096, SUPER1_SIZE
) != 0) {
2293 pr_err("could not allocate superblock\n");
2297 memset(super
, 0, SUPER1_SIZE
);
2299 if (aread(&afd
, super
, MAX_SB_SIZE
) != MAX_SB_SIZE
) {
2301 pr_err("Cannot read superblock on %s\n",
2307 if (__le32_to_cpu(super
->magic
) != MD_SB_MAGIC
) {
2309 pr_err("No super block found on %s (Expected magic %08x, got %08x)\n",
2310 devname
, MD_SB_MAGIC
,
2311 __le32_to_cpu(super
->magic
));
2316 if (__le32_to_cpu(super
->major_version
) != 1) {
2318 pr_err("Cannot interpret superblock on %s - version is %d\n",
2319 devname
, __le32_to_cpu(super
->major_version
));
2323 if (__le64_to_cpu(super
->super_offset
) != sb_offset
) {
2325 pr_err("No superblock found on %s (super_offset is wrong)\n",
2331 bsb
= (struct bitmap_super_s
*)(((char *)super
) + MAX_SB_SIZE
);
2333 misc
= (struct misc_dev_info
*)
2334 (((char *)super
) + MAX_SB_SIZE
+BM_SUPER_SIZE
);
2335 misc
->device_size
= dsize
;
2336 if (st
->data_offset
== INVALID_SECTORS
)
2337 st
->data_offset
= __le64_to_cpu(super
->data_offset
);
2339 if (st
->minor_version
>= 1 &&
2340 st
->ignore_hw_compat
== 0 &&
2341 ((role_from_sb(super
) != MD_DISK_ROLE_JOURNAL
&&
2342 dsize
< (__le64_to_cpu(super
->data_offset
) +
2343 __le64_to_cpu(super
->size
))) ||
2344 dsize
< (__le64_to_cpu(super
->data_offset
) +
2345 __le64_to_cpu(super
->data_size
)))) {
2347 pr_err("Device %s is not large enough for data described in superblock\n",
2354 /* Now check on the bitmap superblock */
2355 if ((__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) == 0)
2357 /* Read the bitmap superblock and make sure it looks
2358 * valid. If it doesn't clear the bit. An --assemble --force
2359 * should get that written out.
2361 locate_bitmap1(st
, fd
, 0);
2362 if (aread(&afd
, bsb
, 512) != 512)
2365 uuid_from_super1(st
, uuid
);
2366 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
2367 memcmp(bsb
->uuid
, uuid
, 16) != 0)
2372 super
->feature_map
= __cpu_to_le32(__le32_to_cpu(super
->feature_map
) &
2373 ~MD_FEATURE_BITMAP_OFFSET
);
2377 static struct supertype
*match_metadata_desc1(char *arg
)
2379 struct supertype
*st
= xcalloc(1, sizeof(*st
));
2381 st
->container_devnm
[0] = 0;
2383 st
->max_devs
= MAX_DEVS
;
2385 st
->data_offset
= INVALID_SECTORS
;
2386 /* leading zeros can be safely ignored. --detail generates them. */
2389 if (strcmp(arg
, "1.0") == 0 || strcmp(arg
, "1.00") == 0) {
2390 st
->minor_version
= 0;
2393 if (strcmp(arg
, "1.1") == 0 || strcmp(arg
, "1.01") == 0
2395 st
->minor_version
= 1;
2398 if (strcmp(arg
, "1.2") == 0 ||
2399 #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
2400 strcmp(arg
, "default") == 0 ||
2401 #endif /* DEFAULT_OLD_METADATA */
2402 strcmp(arg
, "1.02") == 0) {
2403 st
->minor_version
= 2;
2406 if (strcmp(arg
, "1") == 0 || strcmp(arg
, "default") == 0) {
2407 st
->minor_version
= -1;
2415 /* find available size on device with this devsize, using
2416 * superblock type st, and reserving 'reserve' sectors for
2419 static __u64
avail_size1(struct supertype
*st
, __u64 devsize
,
2420 unsigned long long data_offset
)
2422 struct mdp_superblock_1
*super
= st
->sb
;
2428 if (__le32_to_cpu(super
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
) {
2429 /* hot-add. allow for actual size of bitmap */
2430 struct bitmap_super_s
*bsb
;
2431 bsb
= (struct bitmap_super_s
*)(((char *)super
) + MAX_SB_SIZE
);
2432 bmspace
= calc_bitmap_size(bsb
, 4096) >> 9;
2433 } else if (md_feature_any_ppl_on(super
->feature_map
)) {
2434 bmspace
= __le16_to_cpu(super
->ppl
.size
);
2437 /* Allow space for bad block log */
2438 if (super
->bblog_size
)
2439 bbspace
= __le16_to_cpu(super
->bblog_size
);
2441 if (st
->minor_version
< 0)
2442 /* not specified, so time to set default */
2443 st
->minor_version
= 2;
2445 if (data_offset
== INVALID_SECTORS
)
2446 data_offset
= st
->data_offset
;
2448 if (data_offset
!= INVALID_SECTORS
)
2449 switch(st
->minor_version
) {
2451 return devsize
- data_offset
- 8*2 - bbspace
;
2454 return devsize
- data_offset
;
2461 switch(st
->minor_version
) {
2464 return ((devsize
- 8*2 - bbspace
) & ~(4*2-1));
2466 /* at start, 4K for superblock and possible bitmap */
2467 return devsize
- 4*2 - bbspace
;
2469 /* 4k from start, 4K for superblock and possible bitmap */
2470 return devsize
- (4+4)*2 - bbspace
;
2476 add_internal_bitmap1(struct supertype
*st
,
2477 int *chunkp
, int delay
, int write_behind
,
2478 unsigned long long size
,
2479 int may_change
, int major
)
2482 * If not may_change, then this is a 'Grow' without sysfs support for
2483 * bitmaps, and the bitmap must fit after the superblock at 1K offset.
2484 * If may_change, then this is create or a Grow with sysfs support,
2485 * and we can put the bitmap wherever we like.
2487 * size is in sectors, chunk is in bytes !!!
2490 unsigned long long bits
;
2491 unsigned long long max_bits
;
2492 unsigned long long min_chunk
;
2494 long bbl_offset
, bbl_size
;
2495 unsigned long long chunk
= *chunkp
;
2499 struct mdp_superblock_1
*sb
= st
->sb
;
2500 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char *)sb
) + MAX_SB_SIZE
);
2503 if (__le64_to_cpu(sb
->data_size
) == 0)
2505 * Must be creating the array, else data_size
2509 switch(st
->minor_version
) {
2512 * either 3K after the superblock (when hot-add),
2513 * or some amount of space before.
2517 * We are creating array, so we *know* how much room has
2523 choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2525 room
= __le64_to_cpu(sb
->super_offset
)
2526 - __le64_to_cpu(sb
->data_offset
)
2527 - __le64_to_cpu(sb
->data_size
);
2528 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2531 bbl_offset
= (__s32
)__le32_to_cpu(sb
->bblog_offset
);
2532 if (bbl_size
< -bbl_offset
)
2533 bbl_size
= -bbl_offset
;
2536 (room
< 3*2 && __le32_to_cpu(sb
->max_dev
) <= 384)) {
2541 offset
= 0; /* means movable offset */
2546 case 2: /* between superblock and data */
2551 choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2553 room
= __le64_to_cpu(sb
->data_offset
)
2554 - __le64_to_cpu(sb
->super_offset
);
2555 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2558 __le32_to_cpu(sb
->bblog_offset
) + bbl_size
;
2563 room
-= 2; /* Leave 1K for superblock */
2567 room
-= 4*2; /* leave 4K for superblock */
2577 if (chunk
== UnSet
&& room
> 128*2)
2578 /* Limit to 128K of bitmap when chunk size not requested */
2582 /* No room for a bitmap */
2585 max_bits
= (room
* 512 - sizeof(bitmap_super_t
)) * 8;
2587 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
2588 bits
= (size
* 512) / min_chunk
+ 1;
2589 while (bits
> max_bits
) {
2591 bits
= (bits
+ 1) / 2;
2593 if (chunk
== UnSet
) {
2594 /* For practical purpose, 64Meg is a good
2595 * default chunk size for internal bitmaps.
2598 if (chunk
< 64*1024*1024)
2599 chunk
= 64*1024*1024;
2600 } else if (chunk
< min_chunk
)
2601 return -EINVAL
; /* chunk size too small */
2602 if (chunk
== 0) /* rounding problem */
2606 /* start bitmap on a 4K boundary with enough space for
2609 bits
= (size
* 512) / chunk
+ 1;
2610 room
= ((bits
+ 7) / 8 + sizeof(bitmap_super_t
) + 4095) / 4096;
2611 room
*= 8; /* convert 4K blocks to sectors */
2612 offset
= -room
- bbl_size
;
2615 sb
->bitmap_offset
= (int32_t)__cpu_to_le32(offset
);
2617 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
) |
2618 MD_FEATURE_BITMAP_OFFSET
);
2619 memset(bms
, 0, sizeof(*bms
));
2620 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
2621 bms
->version
= __cpu_to_le32(major
);
2622 uuid_from_super1(st
, uuid
);
2623 memcpy(bms
->uuid
, uuid
, 16);
2624 bms
->chunksize
= __cpu_to_le32(chunk
);
2625 bms
->daemon_sleep
= __cpu_to_le32(delay
);
2626 bms
->sync_size
= __cpu_to_le64(size
);
2627 bms
->write_behind
= __cpu_to_le32(write_behind
);
2628 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2630 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
) |
2631 MD_FEATURE_BITMAP_VERSIONED
);
2632 if (st
->cluster_name
) {
2633 len
= sizeof(bms
->cluster_name
);
2634 strncpy((char *)bms
->cluster_name
, st
->cluster_name
, len
);
2635 bms
->cluster_name
[len
- 1] = '\0';
2642 static int locate_bitmap1(struct supertype
*st
, int fd
, int node_num
)
2644 unsigned long long offset
, bm_sectors_per_node
;
2645 struct mdp_superblock_1
*sb
;
2646 bitmap_super_t
*bms
;
2651 if (st
->ss
->load_super(st
, fd
, NULL
))
2652 return -1; /* no error I hope... */
2657 if ((__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
))
2662 offset
= __le64_to_cpu(sb
->super_offset
) + (int32_t)__le32_to_cpu(sb
->bitmap_offset
);
2664 bms
= (bitmap_super_t
*)(((char *)sb
) + MAX_SB_SIZE
);
2665 bm_sectors_per_node
= calc_bitmap_size(bms
, 4096) >> 9;
2666 offset
+= bm_sectors_per_node
* node_num
;
2670 lseek64(fd
, offset
<<9, 0);
2674 static int write_bitmap1(struct supertype
*st
, int fd
, enum bitmap_update update
)
2676 struct mdp_superblock_1
*sb
= st
->sb
;
2677 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char *)sb
) + MAX_SB_SIZE
);
2680 int towrite
, n
, len
;
2681 struct align_fd afd
;
2683 unsigned long long total_bm_space
, bm_space_per_node
;
2687 /* update cluster name */
2688 if (st
->cluster_name
) {
2689 len
= sizeof(bms
->cluster_name
);
2690 memset((char *)bms
->cluster_name
, 0, len
);
2691 strncpy((char *)bms
->cluster_name
,
2692 st
->cluster_name
, len
);
2693 bms
->cluster_name
[len
- 1] = '\0';
2697 /* cluster md only supports superblock 1.2 now */
2698 if (st
->minor_version
!= 2 &&
2699 bms
->version
== BITMAP_MAJOR_CLUSTERED
) {
2700 pr_err("Warning: cluster md only works with superblock 1.2\n");
2704 if (bms
->version
== BITMAP_MAJOR_CLUSTERED
) {
2705 if (st
->nodes
== 1) {
2706 /* the parameter for nodes is not valid */
2707 pr_err("Warning: cluster-md at least needs two nodes\n");
2709 } else if (st
->nodes
== 0) {
2711 * parameter "--nodes" is not specified, (eg, add a disk to
2715 } else if (__cpu_to_le32(st
->nodes
) < bms
->nodes
) {
2717 * Since the nodes num is not increased, no
2718 * need to check the space enough or not,
2719 * just update bms->nodes
2721 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2726 * no need to change bms->nodes for other
2730 pr_err("Warning: --nodes option is only suitable for clustered bitmap\n");
2735 * Each node has an independent bitmap, it is necessary to
2736 * calculate the space is enough or not, first get how many
2737 * bytes for the total bitmap
2739 bm_space_per_node
= calc_bitmap_size(bms
, 4096);
2741 total_bm_space
= 512 * (__le64_to_cpu(sb
->data_offset
) -
2742 __le64_to_cpu(sb
->super_offset
));
2743 /* leave another 4k for superblock */
2744 total_bm_space
= total_bm_space
- 4096;
2746 if (bm_space_per_node
* st
->nodes
> total_bm_space
) {
2747 pr_err("Warning: The max num of nodes can't exceed %llu\n",
2748 total_bm_space
/ bm_space_per_node
);
2752 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2761 if (locate_bitmap1(st
, fd
, 0) < 0) {
2762 pr_err("Error: Invalid bitmap\n");
2766 if (posix_memalign(&buf
, 4096, 4096))
2770 /* Only the bitmap[0] should resync
2771 * whole device on initial assembly
2774 memset(buf
, 0x00, 4096);
2776 memset(buf
, 0xff, 4096);
2777 memcpy(buf
, (char *)bms
, sizeof(bitmap_super_t
));
2780 * use 4096 boundary if bitmap_offset is aligned
2781 * with 8 sectors, then it should compatible with
2784 if (__le32_to_cpu(sb
->bitmap_offset
) & 7)
2785 towrite
= calc_bitmap_size(bms
, 512);
2787 towrite
= calc_bitmap_size(bms
, 4096);
2788 while (towrite
> 0) {
2792 n
= awrite(&afd
, buf
, n
);
2798 memset(buf
, 0x00, 4096);
2800 memset(buf
, 0xff, 4096);
2807 } while (++i
< __le32_to_cpu(bms
->nodes
));
2813 static void free_super1(struct supertype
*st
)
2819 struct devinfo
*di
= st
->info
;
2820 st
->info
= di
->next
;
2828 static int validate_geometry1(struct supertype
*st
, int level
,
2829 int layout
, int raiddisks
,
2830 int *chunk
, unsigned long long size
,
2831 unsigned long long data_offset
,
2832 char *subdev
, unsigned long long *freesize
,
2833 int consistency_policy
, int verbose
)
2835 unsigned long long ldsize
, devsize
;
2837 unsigned long long headroom
;
2838 unsigned long long overhead
;
2841 if (is_container(level
)) {
2843 pr_err("1.x metadata does not support containers\n");
2846 if (*chunk
== UnSet
)
2847 *chunk
= DEFAULT_CHUNK
;
2852 if (st
->minor_version
< 0)
2853 /* not specified, so time to set default */
2854 st
->minor_version
= 2;
2856 fd
= open(subdev
, O_RDONLY
|O_EXCL
, 0);
2859 pr_err("super1.x cannot open %s: %s\n",
2860 subdev
, strerror(errno
));
2864 if (!get_dev_size(fd
, subdev
, &ldsize
)) {
2870 devsize
= ldsize
>> 9;
2872 /* creating: allow suitable space for bitmap or PPL */
2873 if (consistency_policy
== CONSISTENCY_POLICY_PPL
)
2874 bmspace
= MULTIPLE_PPL_AREA_SIZE_SUPER1
>> 9;
2876 bmspace
= choose_bm_space(devsize
);
2878 if (data_offset
== INVALID_SECTORS
)
2879 data_offset
= st
->data_offset
;
2880 if (data_offset
== INVALID_SECTORS
)
2881 switch (st
->minor_version
) {
2887 /* Choose data offset appropriate for this device
2888 * and use as default for whole array.
2889 * The data_offset must allow for bitmap space
2890 * and base metadata, should allow for some headroom
2891 * for reshape, and should be rounded to multiple
2893 * Headroom is limited to 128M, but aim for about 0.1%
2895 headroom
= 128*1024*2;
2896 while ((headroom
<< 10) > devsize
&&
2898 headroom
/ 2 >= ((unsigned)(*chunk
)*2)*2))
2900 data_offset
= 12*2 + bmspace
+ headroom
;
2901 #define ONE_MEG (2*1024)
2902 data_offset
= ROUND_UP(data_offset
, ONE_MEG
);
2905 if (st
->data_offset
== INVALID_SECTORS
)
2906 st
->data_offset
= data_offset
;
2907 switch(st
->minor_version
) {
2908 case 0: /* metadata at end. Round down and subtract space to reserve */
2909 devsize
= (devsize
& ~(4ULL*2-1));
2910 /* space for metadata, bblog, bitmap/ppl */
2911 overhead
= 8*2 + 8 + bmspace
;
2912 if (devsize
< overhead
) /* detect underflow */
2913 goto dev_too_small_err
;
2914 devsize
-= overhead
;
2918 if (devsize
< data_offset
) /* detect underflow */
2919 goto dev_too_small_err
;
2920 devsize
-= data_offset
;
2923 *freesize
= devsize
;
2926 /* Error condition, device cannot even hold the overhead. */
2928 fprintf(stderr
, "device %s is too small (%lluK) for "
2929 "required metadata!\n", subdev
, devsize
>>1);
2934 void *super1_make_v0(struct supertype
*st
, struct mdinfo
*info
, mdp_super_t
*sb0
)
2936 /* Create a v1.0 superblock based on 'info'*/
2938 struct mdp_superblock_1
*sb
;
2940 unsigned long long offset
;
2942 if (posix_memalign(&ret
, 4096, 1024) != 0)
2945 memset(ret
, 0, 1024);
2946 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
2947 sb
->major_version
= __cpu_to_le32(1);
2949 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
2950 sprintf(sb
->set_name
, "%d", sb0
->md_minor
);
2951 sb
->ctime
= __cpu_to_le32(info
->array
.ctime
+ 1);
2952 sb
->level
= __cpu_to_le32(info
->array
.level
);
2953 sb
->layout
= __cpu_to_le32(info
->array
.layout
);
2954 sb
->size
= __cpu_to_le64(info
->component_size
);
2955 sb
->chunksize
= __cpu_to_le32(info
->array
.chunk_size
/ 512);
2956 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
2957 if (info
->array
.level
> 0)
2958 sb
->data_size
= sb
->size
;
2960 sb
->data_size
= st
->ss
->avail_size(st
, st
->devsize
/ 512, 0);
2961 sb
->resync_offset
= MaxSector
;
2962 sb
->max_dev
= __cpu_to_le32(MD_SB_DISKS
);
2963 sb
->dev_number
= __cpu_to_le32(info
->disk
.number
);
2964 sb
->utime
= __cpu_to_le64(info
->array
.utime
);
2966 offset
= st
->devsize
/512 - 8*2;
2968 sb
->super_offset
= __cpu_to_le64(offset
);
2969 //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset);
2971 random_uuid(sb
->device_uuid
);
2973 for (i
= 0; i
< MD_SB_DISKS
; i
++) {
2974 int state
= sb0
->disks
[i
].state
;
2975 sb
->dev_roles
[i
] = MD_DISK_ROLE_SPARE
;
2976 if ((state
& (1<<MD_DISK_SYNC
)) &&
2977 !(state
& (1<<MD_DISK_FAULTY
)))
2978 sb
->dev_roles
[i
] = __cpu_to_le16(sb0
->disks
[i
].raid_disk
);
2980 sb
->sb_csum
= calc_sb_1_csum(sb
);
2984 struct superswitch super1
= {
2985 .examine_super
= examine_super1
,
2986 .brief_examine_super
= brief_examine_super1
,
2987 .export_examine_super
= export_examine_super1
,
2988 .detail_super
= detail_super1
,
2989 .brief_detail_super
= brief_detail_super1
,
2990 .export_detail_super
= export_detail_super1
,
2991 .write_init_super
= write_init_super1
,
2992 .validate_geometry
= validate_geometry1
,
2993 .add_to_super
= add_to_super1
,
2994 .examine_badblocks
= examine_badblocks_super1
,
2995 .copy_metadata
= copy_metadata1
,
2996 .write_init_ppl
= write_init_ppl1
,
2997 .match_home
= match_home1
,
2998 .uuid_from_super
= uuid_from_super1
,
2999 .getinfo_super
= getinfo_super1
,
3000 .container_content
= container_content1
,
3001 .update_super
= update_super1
,
3002 .init_super
= init_super1
,
3003 .store_super
= store_super1
,
3004 .compare_super
= compare_super1
,
3005 .load_super
= load_super1
,
3006 .match_metadata_desc
= match_metadata_desc1
,
3007 .avail_size
= avail_size1
,
3008 .add_internal_bitmap
= add_internal_bitmap1
,
3009 .locate_bitmap
= locate_bitmap1
,
3010 .write_bitmap
= write_bitmap1
,
3011 .free_super
= free_super1
,
3012 #if __BYTE_ORDER == BIG_ENDIAN