2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Email: <neilb@suse.de>
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
; /* only for raid5 currently */
47 __u64 size
; /* used size of component devices, in 512byte sectors */
49 __u32 chunksize
; /* in 512byte sectors */
51 __u32 bitmap_offset
; /* sectors after start of superblock that bitmap starts
52 * NOTE: signed, so bitmap can be before superblock
53 * only meaningful of feature_map[0] is set.
56 /* These are only valid with feature bit '4' */
57 __u32 new_level
; /* new level we are reshaping to */
58 __u64 reshape_position
; /* next address in array-space for reshape */
59 __u32 delta_disks
; /* change in number of raid_disks */
60 __u32 new_layout
; /* new layout */
61 __u32 new_chunk
; /* new chunk size (sectors) */
62 __u32 new_offset
; /* signed number to add to data_offset in new
63 * layout. 0 == no-change. This can be
64 * different on each device in the array.
67 /* constant this-device information - 64 bytes */
68 __u64 data_offset
; /* sector start of data, often 0 */
69 __u64 data_size
; /* sectors in this device that can be used for data */
70 __u64 super_offset
; /* sector start of this superblock */
71 __u64 recovery_offset
;/* sectors before this offset (from data_offset) have been recovered */
72 __u32 dev_number
; /* permanent identifier of this device - not role in raid */
73 __u32 cnt_corrected_read
; /* number of read errors that were corrected by re-writing */
74 __u8 device_uuid
[16]; /* user-space setable, ignored by kernel */
75 __u8 devflags
; /* per-device flags. Only one defined...*/
76 #define WriteMostly1 1 /* mask for writemostly flag in above */
77 /* bad block log. If there are any bad blocks the feature flag is set.
78 * if offset and size are non-zero, that space is reserved and available.
80 __u8 bblog_shift
; /* shift from sectors to block size for badblocklist */
81 __u16 bblog_size
; /* number of sectors reserved for badblocklist */
82 __u32 bblog_offset
; /* sector offset from superblock to bblog, signed */
84 /* array state information - 64 bytes */
85 __u64 utime
; /* 40 bits second, 24 btes microseconds */
86 __u64 events
; /* incremented when superblock updated */
87 __u64 resync_offset
; /* data before this offset (from data_offset) known to be in sync */
88 __u32 sb_csum
; /* checksum upto dev_roles[max_dev] */
89 __u32 max_dev
; /* size of dev_roles[] array to consider */
90 __u8 pad3
[64-32]; /* set to 0 when writing */
92 /* device state information. Indexed by dev_number.
94 * Note there are no per-device state flags. State information is rolled
95 * into the 'roles' value. If a device is spare or faulty, then it doesn't
96 * have a meaningful role.
98 __u16 dev_roles
[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
101 #define MAX_SB_SIZE 4096
102 /* bitmap super size is 256, but we round up to a sector for alignment */
103 #define BM_SUPER_SIZE 512
104 #define MAX_DEVS ((int)(MAX_SB_SIZE - sizeof(struct mdp_superblock_1)) / 2)
105 #define SUPER1_SIZE (MAX_SB_SIZE + BM_SUPER_SIZE \
106 + sizeof(struct misc_dev_info))
108 struct misc_dev_info
{
112 /* feature_map bits */
113 #define MD_FEATURE_BITMAP_OFFSET 1
114 #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
117 #define MD_FEATURE_RESHAPE_ACTIVE 4
118 #define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */
119 #define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an
120 * active device with same 'role'.
121 * 'recovery_offset' is also set.
123 #define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number
124 * of devices, but is going
127 #define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */
128 #define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \
129 |MD_FEATURE_RECOVERY_OFFSET \
130 |MD_FEATURE_RESHAPE_ACTIVE \
131 |MD_FEATURE_BAD_BLOCKS \
132 |MD_FEATURE_REPLACEMENT \
133 |MD_FEATURE_RESHAPE_BACKWARDS \
134 |MD_FEATURE_NEW_OFFSET \
137 static unsigned int calc_sb_1_csum(struct mdp_superblock_1
* sb
)
139 unsigned int disk_csum
, csum
;
140 unsigned long long newcsum
;
141 int size
= sizeof(*sb
) + __le32_to_cpu(sb
->max_dev
)*2;
142 unsigned int *isuper
= (unsigned int*)sb
;
144 /* make sure I can count... */
145 if (offsetof(struct mdp_superblock_1
,data_offset
) != 128 ||
146 offsetof(struct mdp_superblock_1
, utime
) != 192 ||
147 sizeof(struct mdp_superblock_1
) != 256) {
148 fprintf(stderr
, "WARNING - superblock isn't sized correctly\n");
151 disk_csum
= sb
->sb_csum
;
154 for (; size
>=4; size
-= 4 ) {
155 newcsum
+= __le32_to_cpu(*isuper
);
160 newcsum
+= __le16_to_cpu(*(unsigned short*) isuper
);
162 csum
= (newcsum
& 0xffffffff) + (newcsum
>> 32);
163 sb
->sb_csum
= disk_csum
;
164 return __cpu_to_le32(csum
);
168 * Information related to file descriptor used for aligned reads/writes.
169 * Cache the block size.
176 static void init_afd(struct align_fd
*afd
, int fd
)
180 if (ioctl(afd
->fd
, BLKSSZGET
, &afd
->blk_sz
) != 0)
184 static char abuf
[4096+4096];
185 static int aread(struct align_fd
*afd
, void *buf
, int len
)
188 * On devices with a 4K sector size, we need to read
189 * the full sector and copy relevant bits into
198 if (!bsize
|| bsize
> 4096 || len
> 4096) {
200 fprintf(stderr
, "WARNING - aread() called with invalid block size\n");
203 b
= ROUND_UP_PTR((char *)abuf
, 4096);
205 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
207 n
= read(afd
->fd
, b
, iosize
);
210 lseek(afd
->fd
, len
- n
, 1);
217 static int awrite(struct align_fd
*afd
, void *buf
, int len
)
220 * On devices with a 4K sector size, we need to write
221 * the full sector. We pre-read if the sector is larger
223 * The address must be sector-aligned.
230 if (!bsize
|| bsize
> 4096 || len
> 4096) {
232 fprintf(stderr
, "WARNING - awrite() called with invalid block size\n");
235 b
= ROUND_UP_PTR((char *)abuf
, 4096);
237 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
241 n
= read(afd
->fd
, b
, iosize
);
244 lseek(afd
->fd
, -n
, 1);
248 n
= write(afd
->fd
, b
, iosize
);
251 lseek(afd
->fd
, len
- n
, 1);
256 static void examine_super1(struct supertype
*st
, char *homehost
)
258 struct mdp_superblock_1
*sb
= st
->sb
;
265 int l
= homehost
? strlen(homehost
) : 0;
267 unsigned long long sb_offset
;
270 printf(" Magic : %08x\n", __le32_to_cpu(sb
->magic
));
271 printf(" Version : 1");
272 sb_offset
= __le64_to_cpu(sb
->super_offset
);
275 else if (sb_offset
<= 8)
279 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb
->feature_map
));
280 printf(" Array UUID : ");
281 for (i
=0; i
<16; i
++) {
282 if ((i
&3)==0 && i
!= 0) printf(":");
283 printf("%02x", sb
->set_uuid
[i
]);
286 printf(" Name : %.32s", sb
->set_name
);
287 if (l
> 0 && l
< 32 &&
288 sb
->set_name
[l
] == ':' &&
289 strncmp(sb
->set_name
, homehost
, l
) == 0)
290 printf(" (local to host %s)", homehost
);
292 atime
= __le64_to_cpu(sb
->ctime
) & 0xFFFFFFFFFFULL
;
293 printf(" Creation Time : %.24s\n", ctime(&atime
));
294 c
=map_num(pers
, __le32_to_cpu(sb
->level
));
295 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
296 printf(" Raid Devices : %d\n", __le32_to_cpu(sb
->raid_disks
));
298 printf(" Avail Dev Size : %llu%s\n",
299 (unsigned long long)__le64_to_cpu(sb
->data_size
),
300 human_size(__le64_to_cpu(sb
->data_size
)<<9));
301 if (__le32_to_cpu(sb
->level
) > 0) {
302 int ddsks
= 0, ddsks_denom
= 1;
303 switch(__le32_to_cpu(sb
->level
)) {
304 case 1: ddsks
=1;break;
306 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
307 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
309 layout
= __le32_to_cpu(sb
->layout
);
310 ddsks
= __le32_to_cpu(sb
->raid_disks
);
311 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
314 long long asize
= __le64_to_cpu(sb
->size
);
315 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
316 printf(" Array Size : %llu%s\n",
317 asize
>> 10, human_size(asize
));
319 if (sb
->size
!= sb
->data_size
)
320 printf(" Used Dev Size : %llu%s\n",
321 (unsigned long long)__le64_to_cpu(sb
->size
),
322 human_size(__le64_to_cpu(sb
->size
)<<9));
325 printf(" Data Offset : %llu sectors\n",
326 (unsigned long long)__le64_to_cpu(sb
->data_offset
));
327 if (sb
->new_offset
&&
328 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
)) {
329 unsigned long long offset
= __le64_to_cpu(sb
->data_offset
);
330 offset
+= (signed)(int32_t)__le32_to_cpu(sb
->new_offset
);
331 printf(" New Offset : %llu sectors\n", offset
);
333 printf(" Super Offset : %llu sectors\n",
334 (unsigned long long)__le64_to_cpu(sb
->super_offset
));
335 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_RECOVERY_OFFSET
)
336 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb
->recovery_offset
));
338 st
->ss
->getinfo_super(st
, &info
, NULL
);
339 if (info
.space_after
!= 1 &&
340 !(__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
))
341 printf(" Unused Space : before=%llu sectors, after=%llu sectors\n",
342 info
.space_before
, info
.space_after
);
344 printf(" State : %s\n", (__le64_to_cpu(sb
->resync_offset
)+1)? "active":"clean");
345 printf(" Device UUID : ");
346 for (i
=0; i
<16; i
++) {
347 if ((i
&3)==0 && i
!= 0) printf(":");
348 printf("%02x", sb
->device_uuid
[i
]);
352 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
353 printf("Internal Bitmap : %ld sectors from superblock\n",
354 (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
));
356 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)) {
357 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb
->reshape_position
)/2,
358 human_size(__le64_to_cpu(sb
->reshape_position
)<<9));
359 if (__le32_to_cpu(sb
->delta_disks
)) {
360 printf(" Delta Devices : %d", __le32_to_cpu(sb
->delta_disks
));
361 printf(" (%d->%d)\n",
362 __le32_to_cpu(sb
->raid_disks
)-__le32_to_cpu(sb
->delta_disks
),
363 __le32_to_cpu(sb
->raid_disks
));
364 if ((int)__le32_to_cpu(sb
->delta_disks
) < 0)
365 delta_extra
= -__le32_to_cpu(sb
->delta_disks
);
367 if (__le32_to_cpu(sb
->new_level
) != __le32_to_cpu(sb
->level
)) {
368 c
= map_num(pers
, __le32_to_cpu(sb
->new_level
));
369 printf(" New Level : %s\n", c
?c
:"-unknown-");
371 if (__le32_to_cpu(sb
->new_layout
) != __le32_to_cpu(sb
->layout
)) {
372 if (__le32_to_cpu(sb
->level
) == 5) {
373 c
= map_num(r5layout
, __le32_to_cpu(sb
->new_layout
));
374 printf(" New Layout : %s\n", c
?c
:"-unknown-");
376 if (__le32_to_cpu(sb
->level
) == 6) {
377 c
= map_num(r6layout
, __le32_to_cpu(sb
->new_layout
));
378 printf(" New Layout : %s\n", c
?c
:"-unknown-");
380 if (__le32_to_cpu(sb
->level
) == 10) {
381 printf(" New Layout :");
382 print_r10_layout(__le32_to_cpu(sb
->new_layout
));
386 if (__le32_to_cpu(sb
->new_chunk
) != __le32_to_cpu(sb
->chunksize
))
387 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb
->new_chunk
)/2);
392 if (sb
->devflags
& WriteMostly1
)
393 printf(" write-mostly");
397 atime
= __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
;
398 printf(" Update Time : %.24s\n", ctime(&atime
));
400 if (sb
->bblog_size
&& sb
->bblog_offset
) {
401 printf(" Bad Block Log : %d entries available at offset %ld sectors",
402 __le16_to_cpu(sb
->bblog_size
)*512/8,
403 (long)(int32_t)__le32_to_cpu(sb
->bblog_offset
));
404 if (sb
->feature_map
&
405 __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
406 printf(" - bad blocks present.");
410 if (calc_sb_1_csum(sb
) == sb
->sb_csum
)
411 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb
->sb_csum
));
413 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb
->sb_csum
),
414 __le32_to_cpu(calc_sb_1_csum(sb
)));
415 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb
->events
));
417 if (__le32_to_cpu(sb
->level
) == 5) {
418 c
= map_num(r5layout
, __le32_to_cpu(sb
->layout
));
419 printf(" Layout : %s\n", c
?c
:"-unknown-");
421 if (__le32_to_cpu(sb
->level
) == 6) {
422 c
= map_num(r6layout
, __le32_to_cpu(sb
->layout
));
423 printf(" Layout : %s\n", c
?c
:"-unknown-");
425 if (__le32_to_cpu(sb
->level
) == 10) {
426 int lo
= __le32_to_cpu(sb
->layout
);
428 print_r10_layout(lo
);
431 switch(__le32_to_cpu(sb
->level
)) {
437 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
440 printf(" Rounding : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
446 /* This turns out to just be confusing */
447 printf(" Array Slot : %d (", __le32_to_cpu(sb
->dev_number
));
448 for (i
= __le32_to_cpu(sb
->max_dev
); i
> 0 ; i
--)
449 if (__le16_to_cpu(sb
->dev_roles
[i
-1]) != 0xffff)
451 for (d
=0; d
< i
; d
++) {
452 int role
= __le16_to_cpu(sb
->dev_roles
[d
]);
454 if (role
== 0xffff) printf("empty");
455 else if(role
== 0xfffe) printf("failed");
456 else printf("%d", role
);
460 printf(" Device Role : ");
461 d
= __le32_to_cpu(sb
->dev_number
);
462 if (d
< __le32_to_cpu(sb
->max_dev
))
463 role
= __le16_to_cpu(sb
->dev_roles
[d
]);
468 else if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_REPLACEMENT
))
469 printf("Replacement device %d\n", role
);
471 printf("Active device %d\n", role
);
473 printf(" Array State : ");
474 for (d
=0; d
<__le32_to_cpu(sb
->raid_disks
) + delta_extra
; d
++) {
477 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
478 unsigned int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
492 /* This is confusing too */
494 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
495 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
499 if (faulty
) printf(" %d failed", faulty
);
501 printf(" ('A' == active, '.' == missing, 'R' == replacing)");
505 static void brief_examine_super1(struct supertype
*st
, int verbose
)
507 struct mdp_superblock_1
*sb
= st
->sb
;
509 unsigned long long sb_offset
;
511 char *c
=map_num(pers
, __le32_to_cpu(sb
->level
));
513 nm
= strchr(sb
->set_name
, ':');
516 else if (sb
->set_name
[0])
528 printf(" level=%s", c
);
529 sb_offset
= __le64_to_cpu(sb
->super_offset
);
531 printf(" metadata=1.1 ");
532 else if (sb_offset
<= 8)
533 printf(" metadata=1.2 ");
535 printf(" metadata=1.0 ");
537 printf("num-devices=%d ", __le32_to_cpu(sb
->raid_disks
));
539 for (i
=0; i
<16; i
++) {
540 if ((i
&3)==0 && i
!= 0) printf(":");
541 printf("%02x", sb
->set_uuid
[i
]);
543 if (sb
->set_name
[0]) {
545 print_quoted(sb
->set_name
);
550 static void export_examine_super1(struct supertype
*st
)
552 struct mdp_superblock_1
*sb
= st
->sb
;
557 printf("MD_LEVEL=%s\n", map_num(pers
, __le32_to_cpu(sb
->level
)));
558 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb
->raid_disks
));
560 if (sb
->set_name
[i
] == '\n' ||
561 sb
->set_name
[i
] == '\0') {
566 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
567 if (__le32_to_cpu(sb
->level
) > 0) {
568 int ddsks
= 0, ddsks_denom
= 1;
569 switch(__le32_to_cpu(sb
->level
)) {
570 case 1: ddsks
=1;break;
572 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
573 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
575 layout
= __le32_to_cpu(sb
->layout
);
576 ddsks
= __le32_to_cpu(sb
->raid_disks
);
577 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
580 long long asize
= __le64_to_cpu(sb
->size
);
581 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
582 printf("MD_ARRAY_SIZE=%s\n",human_size_brief(asize
,JEDEC
));
586 for (i
=0; i
<16; i
++) {
587 if ((i
&3)==0 && i
!= 0) printf(":");
588 printf("%02x", sb
->set_uuid
[i
]);
591 printf("MD_UPDATE_TIME=%llu\n",
592 __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
);
593 printf("MD_DEV_UUID=");
594 for (i
=0; i
<16; i
++) {
595 if ((i
&3)==0 && i
!= 0) printf(":");
596 printf("%02x", sb
->device_uuid
[i
]);
599 printf("MD_EVENTS=%llu\n",
600 (unsigned long long)__le64_to_cpu(sb
->events
));
603 static int copy_metadata1(struct supertype
*st
, int from
, int to
)
605 /* Read superblock. If it looks good, write it out.
606 * Then if a bitmap is present, copy that.
607 * And if a bad-block-list is present, copy that too.
610 unsigned long long dsize
, sb_offset
;
611 const int bufsize
= 4*1024;
612 struct mdp_superblock_1 super
, *sb
;
614 if (posix_memalign(&buf
, 4096, bufsize
) != 0)
617 if (!get_dev_size(from
, NULL
, &dsize
))
623 switch(st
->minor_version
) {
627 sb_offset
&= ~(4*2-1);
639 if (lseek64(from
, sb_offset
<< 9, 0) < 0LL)
641 if (read(from
, buf
, bufsize
) != bufsize
)
645 super
= *sb
; // save most of sb for when we reuse buf
647 if (__le32_to_cpu(super
.magic
) != MD_SB_MAGIC
||
648 __le32_to_cpu(super
.major_version
) != 1 ||
649 __le64_to_cpu(super
.super_offset
) != sb_offset
||
650 calc_sb_1_csum(sb
) != super
.sb_csum
)
653 if (lseek64(to
, sb_offset
<< 9, 0) < 0LL)
655 if (write(to
, buf
, bufsize
) != bufsize
)
658 if (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
659 unsigned long long bitmap_offset
= sb_offset
;
660 int bytes
= 4096; // just an estimate.
662 struct align_fd afrom
, ato
;
664 init_afd(&afrom
, from
);
667 bitmap_offset
+= (int32_t)__le32_to_cpu(super
.bitmap_offset
);
669 if (lseek64(from
, bitmap_offset
<<9, 0) < 0)
671 if (lseek64(to
, bitmap_offset
<<9, 0) < 0)
674 for (written
= 0; written
< bytes
; ) {
675 int n
= bytes
- written
;
678 if (aread(&afrom
, buf
, n
) != n
)
681 /* have the header, can calculate
682 * correct bitmap bytes */
686 bits
= __le64_to_cpu(bms
->sync_size
) / (__le32_to_cpu(bms
->chunksize
)>>9);
687 bytes
= (bits
+7) >> 3;
688 bytes
+= sizeof(bitmap_super_t
);
689 bytes
= ROUND_UP(bytes
, 512);
693 if (awrite(&ato
, buf
, n
) != n
)
699 if (super
.bblog_size
!= 0 &&
700 __le32_to_cpu(super
.bblog_size
) <= 100 &&
701 super
.bblog_offset
!= 0 &&
702 (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BAD_BLOCKS
))) {
703 /* There is a bad block log */
704 unsigned long long bb_offset
= sb_offset
;
705 int bytes
= __le32_to_cpu(super
.bblog_size
) * 512;
707 struct align_fd afrom
, ato
;
709 init_afd(&afrom
, from
);
712 bb_offset
+= (int32_t)__le32_to_cpu(super
.bblog_offset
);
714 if (lseek64(from
, bb_offset
<<9, 0) < 0)
716 if (lseek64(to
, bb_offset
<<9, 0) < 0)
719 for (written
= 0; written
< bytes
; ) {
720 int n
= bytes
- written
;
723 if (aread(&afrom
, buf
, n
) != n
)
726 if (awrite(&ato
, buf
, n
) != n
)
740 static void detail_super1(struct supertype
*st
, char *homehost
)
742 struct mdp_superblock_1
*sb
= st
->sb
;
744 int l
= homehost
? strlen(homehost
) : 0;
746 printf(" Name : %.32s", sb
->set_name
);
747 if (l
> 0 && l
< 32 &&
748 sb
->set_name
[l
] == ':' &&
749 strncmp(sb
->set_name
, homehost
, l
) == 0)
750 printf(" (local to host %s)", homehost
);
751 printf("\n UUID : ");
752 for (i
=0; i
<16; i
++) {
753 if ((i
&3)==0 && i
!= 0) printf(":");
754 printf("%02x", sb
->set_uuid
[i
]);
756 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb
->events
));
759 static void brief_detail_super1(struct supertype
*st
)
761 struct mdp_superblock_1
*sb
= st
->sb
;
764 if (sb
->set_name
[0]) {
766 print_quoted(sb
->set_name
);
769 for (i
=0; i
<16; i
++) {
770 if ((i
&3)==0 && i
!= 0) printf(":");
771 printf("%02x", sb
->set_uuid
[i
]);
775 static void export_detail_super1(struct supertype
*st
)
777 struct mdp_superblock_1
*sb
= st
->sb
;
782 if (sb
->set_name
[i
] == '\n' ||
783 sb
->set_name
[i
] == '\0') {
788 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
791 static int examine_badblocks_super1(struct supertype
*st
, int fd
, char *devname
)
793 struct mdp_superblock_1
*sb
= st
->sb
;
794 unsigned long long offset
;
799 if (!sb
->bblog_size
|| __le32_to_cpu(sb
->bblog_size
) > 100
800 || !sb
->bblog_offset
){
801 printf("No bad-blocks list configured on %s\n", devname
);
804 if ((sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
806 printf("Bad-blocks list is empty in %s\n", devname
);
810 size
= __le32_to_cpu(sb
->bblog_size
)* 512;
811 if (posix_memalign((void**)&bbl
, 4096, size
) != 0) {
812 pr_err("could not allocate badblocks list\n");
815 offset
= __le64_to_cpu(sb
->super_offset
) +
816 (int)__le32_to_cpu(sb
->bblog_offset
);
818 if (lseek64(fd
, offset
, 0) < 0) {
819 pr_err("Cannot seek to bad-blocks list\n");
822 if (read(fd
, bbl
, size
) != size
) {
823 pr_err("Cannot read bad-blocks list\n");
826 /* 64bits per entry. 10 bits is block-count, 54 bits is block
827 * offset. Blocks are sectors unless bblog->shift makes them bigger
830 printf("Bad-blocks on %s:\n", devname
);
831 for (i
= 0; i
< size
/8; i
++, bbp
++) {
832 __u64 bb
= __le64_to_cpu(*bbp
);
833 int count
= bb
& 0x3ff;
834 unsigned long long sector
= bb
>> 10;
839 sector
<<= sb
->bblog_shift
;
840 count
<<= sb
->bblog_shift
;
842 printf("%20llu for %d sectors\n", sector
, count
);
849 static int match_home1(struct supertype
*st
, char *homehost
)
851 struct mdp_superblock_1
*sb
= st
->sb
;
852 int l
= homehost
? strlen(homehost
) : 0;
854 return (l
> 0 && l
< 32 &&
855 sb
->set_name
[l
] == ':' &&
856 strncmp(sb
->set_name
, homehost
, l
) == 0);
859 static void uuid_from_super1(struct supertype
*st
, int uuid
[4])
861 struct mdp_superblock_1
*super
= st
->sb
;
862 char *cuuid
= (char*)uuid
;
865 cuuid
[i
] = super
->set_uuid
[i
];
868 static void getinfo_super1(struct supertype
*st
, struct mdinfo
*info
, char *map
)
870 struct mdp_superblock_1
*sb
= st
->sb
;
871 struct bitmap_super_s
*bsb
= (void*)(((char*)sb
)+MAX_SB_SIZE
);
872 struct misc_dev_info
*misc
= (void*)(((char*)sb
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
876 unsigned int map_disks
= info
->array
.raid_disks
;
877 unsigned long long super_offset
;
878 unsigned long long data_size
;
880 memset(info
, 0, sizeof(*info
));
881 info
->array
.major_version
= 1;
882 info
->array
.minor_version
= st
->minor_version
;
883 info
->array
.patch_version
= 0;
884 info
->array
.raid_disks
= __le32_to_cpu(sb
->raid_disks
);
885 info
->array
.level
= __le32_to_cpu(sb
->level
);
886 info
->array
.layout
= __le32_to_cpu(sb
->layout
);
887 info
->array
.md_minor
= -1;
888 info
->array
.ctime
= __le64_to_cpu(sb
->ctime
);
889 info
->array
.utime
= __le64_to_cpu(sb
->utime
);
890 info
->array
.chunk_size
= __le32_to_cpu(sb
->chunksize
)*512;
892 (__le64_to_cpu(sb
->resync_offset
) == MaxSector
)
895 info
->data_offset
= __le64_to_cpu(sb
->data_offset
);
896 info
->component_size
= __le64_to_cpu(sb
->size
);
897 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
))
898 info
->bitmap_offset
= (int32_t)__le32_to_cpu(sb
->bitmap_offset
);
900 info
->disk
.major
= 0;
901 info
->disk
.minor
= 0;
902 info
->disk
.number
= __le32_to_cpu(sb
->dev_number
);
903 if (__le32_to_cpu(sb
->dev_number
) >= __le32_to_cpu(sb
->max_dev
) ||
904 __le32_to_cpu(sb
->dev_number
) >= MAX_DEVS
)
907 role
= __le16_to_cpu(sb
->dev_roles
[__le32_to_cpu(sb
->dev_number
)]);
909 super_offset
= __le64_to_cpu(sb
->super_offset
);
910 if (info
->array
.level
<= 0)
911 data_size
= __le64_to_cpu(sb
->data_size
);
913 data_size
= __le64_to_cpu(sb
->size
);
914 if (info
->data_offset
< super_offset
) {
915 unsigned long long end
;
916 info
->space_before
= info
->data_offset
;
919 if (sb
->bblog_offset
&& sb
->bblog_size
) {
920 unsigned long long bboffset
= super_offset
;
921 bboffset
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
926 if (super_offset
+ info
->bitmap_offset
< end
)
927 end
= super_offset
+ info
->bitmap_offset
;
929 if (info
->data_offset
+ data_size
< end
)
930 info
->space_after
= end
- data_size
- info
->data_offset
;
932 info
->space_after
= 0;
934 unsigned long long earliest
;
935 earliest
= super_offset
+ (32+4)*2; /* match kernel */
936 if (info
->bitmap_offset
> 0) {
937 unsigned long long bmend
= info
->bitmap_offset
;
938 unsigned long long size
= __le64_to_cpu(bsb
->sync_size
);
939 size
/= __le32_to_cpu(bsb
->chunksize
) >> 9;
940 size
= (size
+ 7) >> 3;
941 size
+= sizeof(bitmap_super_t
);
942 size
= ROUND_UP(size
, 4096);
945 if (bmend
> earliest
)
948 if (sb
->bblog_offset
&& sb
->bblog_size
) {
949 unsigned long long bbend
= super_offset
;
950 bbend
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
951 bbend
+= __le32_to_cpu(sb
->bblog_size
);
952 if (bbend
> earliest
)
955 if (earliest
< info
->data_offset
)
956 info
->space_before
= info
->data_offset
- earliest
;
958 info
->space_before
= 0;
959 info
->space_after
= misc
->device_size
- data_size
- info
->data_offset
;
961 if (info
->space_before
== 0 && info
->space_after
== 0) {
962 /* It will look like we don't support data_offset changes,
963 * be we do - it's just that there is no room.
964 * A change that reduced the number of devices should
965 * still be allowed, so set the otherwise useless value of '1'
967 info
->space_after
= 1;
970 info
->disk
.raid_disk
= -1;
973 info
->disk
.state
= 0; /* spare: not active, not sync, not faulty */
976 info
->disk
.state
= 1; /* faulty */
979 info
->disk
.state
= 6; /* active and in sync */
980 info
->disk
.raid_disk
= role
;
982 if (sb
->devflags
& WriteMostly1
)
983 info
->disk
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
984 info
->events
= __le64_to_cpu(sb
->events
);
985 sprintf(info
->text_version
, "1.%d", st
->minor_version
);
986 info
->safe_mode_delay
= 200;
988 memcpy(info
->uuid
, sb
->set_uuid
, 16);
990 strncpy(info
->name
, sb
->set_name
, 32);
993 if ((__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_REPLACEMENT
)) {
994 info
->disk
.state
&= ~(1 << MD_DISK_SYNC
);
995 info
->disk
.state
|= 1 << MD_DISK_REPLACEMENT
;
998 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET
))
999 info
->recovery_start
= __le32_to_cpu(sb
->recovery_offset
);
1001 info
->recovery_start
= MaxSector
;
1003 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
1004 info
->reshape_active
= 1;
1005 if ((sb
->feature_map
& __le32_to_cpu(MD_FEATURE_NEW_OFFSET
)) &&
1006 sb
->new_offset
!= 0)
1007 info
->reshape_active
|= RESHAPE_NO_BACKUP
;
1008 info
->reshape_progress
= __le64_to_cpu(sb
->reshape_position
);
1009 info
->new_level
= __le32_to_cpu(sb
->new_level
);
1010 info
->delta_disks
= __le32_to_cpu(sb
->delta_disks
);
1011 info
->new_layout
= __le32_to_cpu(sb
->new_layout
);
1012 info
->new_chunk
= __le32_to_cpu(sb
->new_chunk
)<<9;
1013 if (info
->delta_disks
< 0)
1014 info
->array
.raid_disks
-= info
->delta_disks
;
1016 info
->reshape_active
= 0;
1018 info
->recovery_blocked
= info
->reshape_active
;
1021 for (i
=0; i
<map_disks
; i
++)
1023 for (i
= 0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
1024 role
= __le16_to_cpu(sb
->dev_roles
[i
]);
1025 if (/*role == 0xFFFF || */role
< (unsigned) info
->array
.raid_disks
) {
1027 if (map
&& role
< map_disks
)
1032 info
->array
.working_disks
= working
;
1035 static struct mdinfo
*container_content1(struct supertype
*st
, char *subarray
)
1037 struct mdinfo
*info
;
1042 info
= xmalloc(sizeof(*info
));
1043 getinfo_super1(st
, info
, NULL
);
1047 static int update_super1(struct supertype
*st
, struct mdinfo
*info
,
1049 char *devname
, int verbose
,
1050 int uuid_set
, char *homehost
)
1052 /* NOTE: for 'assemble' and 'force' we need to return non-zero
1053 * if any change was made. For others, the return value is
1057 struct mdp_superblock_1
*sb
= st
->sb
;
1059 if (strcmp(update
, "homehost") == 0 &&
1061 /* Note that 'homehost' is special as it is really
1066 c
= strchr(sb
->set_name
, ':');
1068 strncpy(info
->name
, c
+1, 31 - (c
-sb
->set_name
));
1070 strncpy(info
->name
, sb
->set_name
, 32);
1074 if (strcmp(update
, "force-one")==0) {
1075 /* Not enough devices for a working array,
1076 * so bring this one up-to-date
1078 if (sb
->events
!= __cpu_to_le64(info
->events
))
1080 sb
->events
= __cpu_to_le64(info
->events
);
1081 } else if (strcmp(update
, "force-array")==0) {
1082 /* Degraded array and 'force' requests to
1083 * maybe need to mark it 'clean'.
1085 switch(__le32_to_cpu(sb
->level
)) {
1086 case 5: case 4: case 6:
1087 /* need to force clean */
1088 if (sb
->resync_offset
!= MaxSector
)
1090 sb
->resync_offset
= MaxSector
;
1092 } else if (strcmp(update
, "assemble")==0) {
1093 int d
= info
->disk
.number
;
1095 if (info
->disk
.state
& (1<<MD_DISK_ACTIVE
))
1096 want
= info
->disk
.raid_disk
;
1099 if (sb
->dev_roles
[d
] != __cpu_to_le16(want
)) {
1100 sb
->dev_roles
[d
] = __cpu_to_le16(want
);
1103 if (info
->reshape_active
&&
1104 sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1105 info
->delta_disks
>= 0 &&
1106 info
->reshape_progress
< __le64_to_cpu(sb
->reshape_position
)) {
1107 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1110 if (info
->reshape_active
&&
1111 sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1112 info
->delta_disks
< 0 &&
1113 info
->reshape_progress
> __le64_to_cpu(sb
->reshape_position
)) {
1114 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1117 } else if (strcmp(update
, "linear-grow-new") == 0) {
1120 unsigned int max
= __le32_to_cpu(sb
->max_dev
);
1122 for (i
=0 ; i
< max
; i
++)
1123 if (__le16_to_cpu(sb
->dev_roles
[i
]) >= 0xfffe)
1125 sb
->dev_number
= __cpu_to_le32(i
);
1126 info
->disk
.number
= i
;
1127 if (max
>= __le32_to_cpu(sb
->max_dev
))
1128 sb
->max_dev
= __cpu_to_le32(max
+1);
1130 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1131 read(rfd
, sb
->device_uuid
, 16) != 16) {
1132 __u32 r
[4] = {random(), random(), random(), random()};
1133 memcpy(sb
->device_uuid
, r
, 16);
1139 __cpu_to_le16(info
->disk
.raid_disk
);
1141 fd
= open(devname
, O_RDONLY
);
1143 unsigned long long ds
;
1144 get_dev_size(fd
, devname
, &ds
);
1147 if (__le64_to_cpu(sb
->super_offset
) <
1148 __le64_to_cpu(sb
->data_offset
)) {
1149 sb
->data_size
= __cpu_to_le64(
1150 ds
- __le64_to_cpu(sb
->data_offset
));
1153 ds
&= ~(unsigned long long)(4*2-1);
1154 sb
->super_offset
= __cpu_to_le64(ds
);
1155 sb
->data_size
= __cpu_to_le64(
1156 ds
- __le64_to_cpu(sb
->data_offset
));
1159 } else if (strcmp(update
, "linear-grow-update") == 0) {
1160 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
1161 sb
->dev_roles
[info
->disk
.number
] =
1162 __cpu_to_le16(info
->disk
.raid_disk
);
1163 } else if (strcmp(update
, "resync") == 0) {
1164 /* make sure resync happens */
1165 sb
->resync_offset
= 0ULL;
1166 } else if (strcmp(update
, "uuid") == 0) {
1167 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
1169 if (__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
1170 struct bitmap_super_s
*bm
;
1171 bm
= (struct bitmap_super_s
*)(st
->sb
+MAX_SB_SIZE
);
1172 memcpy(bm
->uuid
, sb
->set_uuid
, 16);
1174 } else if (strcmp(update
, "no-bitmap") == 0) {
1175 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
);
1176 } else if (strcmp(update
, "bbl") == 0) {
1177 /* only possible if there is room after the bitmap, or if
1178 * there is no bitmap
1180 unsigned long long sb_offset
= __le64_to_cpu(sb
->super_offset
);
1181 unsigned long long data_offset
= __le64_to_cpu(sb
->data_offset
);
1182 long bitmap_offset
= (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
);
1183 long bm_sectors
= 0;
1187 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1188 struct bitmap_super_s
*bsb
;
1189 bsb
= (struct bitmap_super_s
*)(((char*)sb
)+MAX_SB_SIZE
);
1190 bm_sectors
= bitmap_sectors(bsb
);
1193 if (sb_offset
< data_offset
) {
1194 /* 1.1 or 1.2. Put bbl after bitmap leaving at least 32K
1197 bb_offset
= sb_offset
+ 8;
1198 if (bm_sectors
&& bitmap_offset
> 0)
1199 bb_offset
= bitmap_offset
+ bm_sectors
;
1200 while (bb_offset
< (long)sb_offset
+ 8 + 32*2
1201 && bb_offset
+ 8+8 <= (long)data_offset
)
1202 /* too close to bitmap, and room to grow */
1204 if (bb_offset
+ 8 <= (long)data_offset
) {
1205 sb
->bblog_size
= __cpu_to_le16(8);
1206 sb
->bblog_offset
= __cpu_to_le32(bb_offset
);
1209 /* 1.0 - Put bbl just before super block */
1210 if (bm_sectors
&& bitmap_offset
< 0)
1211 space
= -bitmap_offset
- bm_sectors
;
1213 space
= sb_offset
- data_offset
-
1214 __le64_to_cpu(sb
->data_size
);
1216 sb
->bblog_size
= __cpu_to_le16(8);
1217 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1220 } else if (strcmp(update
, "no-bbl") == 0) {
1221 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
1222 pr_err("Cannot remove active bbl from %s\n",devname
);
1225 sb
->bblog_shift
= 0;
1226 sb
->bblog_offset
= 0;
1228 } else if (strcmp(update
, "name") == 0) {
1229 if (info
->name
[0] == 0)
1230 sprintf(info
->name
, "%d", info
->array
.md_minor
);
1231 memset(sb
->set_name
, 0, sizeof(sb
->set_name
));
1233 strchr(info
->name
, ':') == NULL
&&
1234 strlen(homehost
)+1+strlen(info
->name
) < 32) {
1235 strcpy(sb
->set_name
, homehost
);
1236 strcat(sb
->set_name
, ":");
1237 strcat(sb
->set_name
, info
->name
);
1239 strcpy(sb
->set_name
, info
->name
);
1240 } else if (strcmp(update
, "devicesize") == 0 &&
1241 __le64_to_cpu(sb
->super_offset
) <
1242 __le64_to_cpu(sb
->data_offset
)) {
1243 /* set data_size to device size less data_offset */
1244 struct misc_dev_info
*misc
= (struct misc_dev_info
*)
1245 (st
->sb
+ MAX_SB_SIZE
+ BM_SUPER_SIZE
);
1246 sb
->data_size
= __cpu_to_le64(
1247 misc
->device_size
- __le64_to_cpu(sb
->data_offset
));
1248 } else if (strcmp(update
, "revert-reshape") == 0) {
1250 if (!(sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)))
1251 pr_err("No active reshape to revert on %s\n",
1255 unsigned long long reshape_sectors
;
1258 /* reshape_position is a little messy.
1259 * Its value must be a multiple of the larger
1260 * chunk size, and of the "after" data disks.
1261 * So when reverting we need to change it to
1262 * be a multiple of the new "after" data disks,
1263 * which is the old "before".
1264 * If it isn't already a multiple of 'before',
1265 * the only thing we could do would be
1266 * copy some block around on the disks, which
1267 * is easy to get wrong.
1268 * So we reject a revert-reshape unless the
1269 * alignment is good.
1271 if (__le32_to_cpu(sb
->level
) >= 4 &&
1272 __le32_to_cpu(sb
->level
) <= 6) {
1273 reshape_sectors
= __le64_to_cpu(sb
->reshape_position
);
1274 reshape_chunk
= __le32_to_cpu(sb
->new_chunk
);
1275 reshape_chunk
*= __le32_to_cpu(sb
->raid_disks
) - __le32_to_cpu(sb
->delta_disks
) -
1276 (__le32_to_cpu(sb
->level
)==6 ? 2 : 1);
1277 if (reshape_sectors
% reshape_chunk
) {
1278 pr_err("Reshape position is not suitably aligned.\n");
1279 pr_err("Try normal assembly and stop again\n");
1283 sb
->raid_disks
= __cpu_to_le32(__le32_to_cpu(sb
->raid_disks
) -
1284 __le32_to_cpu(sb
->delta_disks
));
1285 if (sb
->delta_disks
== 0)
1286 sb
->feature_map
^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS
);
1288 sb
->delta_disks
= __cpu_to_le32(-__le32_to_cpu(sb
->delta_disks
));
1290 temp
= sb
->new_layout
;
1291 sb
->new_layout
= sb
->layout
;
1294 temp
= sb
->new_chunk
;
1295 sb
->new_chunk
= sb
->chunksize
;
1296 sb
->chunksize
= temp
;
1298 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_NEW_OFFSET
)) {
1299 long offset_delta
= (int32_t)__le32_to_cpu(sb
->new_offset
);
1300 sb
->data_offset
= __cpu_to_le64(__le64_to_cpu(sb
->data_offset
) + offset_delta
);
1301 sb
->new_offset
= __cpu_to_le32(-offset_delta
);
1302 sb
->data_size
= __cpu_to_le64(__le64_to_cpu(sb
->data_size
) - offset_delta
);
1305 } else if (strcmp(update
, "_reshape_progress")==0)
1306 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1307 else if (strcmp(update
, "writemostly")==0)
1308 sb
->devflags
|= WriteMostly1
;
1309 else if (strcmp(update
, "readwrite")==0)
1310 sb
->devflags
&= ~WriteMostly1
;
1314 sb
->sb_csum
= calc_sb_1_csum(sb
);
1318 static int init_super1(struct supertype
*st
, mdu_array_info_t
*info
,
1319 unsigned long long size
, char *name
, char *homehost
,
1320 int *uuid
, unsigned long long data_offset
)
1322 struct mdp_superblock_1
*sb
;
1328 if (posix_memalign((void**)&sb
, 4096, SUPER1_SIZE
) != 0) {
1329 pr_err("could not allocate superblock\n");
1332 memset(sb
, 0, SUPER1_SIZE
);
1336 /* zeroing superblock */
1340 spares
= info
->working_disks
- info
->active_disks
;
1341 if (info
->raid_disks
+ spares
> MAX_DEVS
) {
1342 pr_err("too many devices requested: %d+%d > %d\n",
1343 info
->raid_disks
, spares
, MAX_DEVS
);
1347 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
1348 sb
->major_version
= __cpu_to_le32(1);
1349 sb
->feature_map
= 0;
1353 copy_uuid(sb
->set_uuid
, uuid
, super1
.swapuuid
);
1355 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1356 read(rfd
, sb
->set_uuid
, 16) != 16) {
1357 __u32 r
[4] = {random(), random(), random(), random()};
1358 memcpy(sb
->set_uuid
, r
, 16);
1360 if (rfd
>= 0) close(rfd
);
1363 if (name
== NULL
|| *name
== 0) {
1364 sprintf(defname
, "%d", info
->md_minor
);
1368 strchr(name
, ':')== NULL
&&
1369 strlen(homehost
)+1+strlen(name
) < 32) {
1370 strcpy(sb
->set_name
, homehost
);
1371 strcat(sb
->set_name
, ":");
1372 strcat(sb
->set_name
, name
);
1374 strcpy(sb
->set_name
, name
);
1376 sb
->ctime
= __cpu_to_le64((unsigned long long)time(0));
1377 sb
->level
= __cpu_to_le32(info
->level
);
1378 sb
->layout
= __cpu_to_le32(info
->layout
);
1379 sb
->size
= __cpu_to_le64(size
*2ULL);
1380 sb
->chunksize
= __cpu_to_le32(info
->chunk_size
>>9);
1381 sb
->raid_disks
= __cpu_to_le32(info
->raid_disks
);
1383 sb
->data_offset
= __cpu_to_le64(data_offset
);
1384 sb
->data_size
= __cpu_to_le64(0);
1385 sb
->super_offset
= __cpu_to_le64(0);
1386 sb
->recovery_offset
= __cpu_to_le64(0);
1388 sb
->utime
= sb
->ctime
;
1389 sb
->events
= __cpu_to_le64(1);
1390 if (info
->state
& (1<<MD_SB_CLEAN
))
1391 sb
->resync_offset
= MaxSector
;
1393 sb
->resync_offset
= 0;
1394 sbsize
= sizeof(struct mdp_superblock_1
) + 2 * (info
->raid_disks
+ spares
);
1395 sbsize
= ROUND_UP(sbsize
, 512);
1396 sb
->max_dev
= __cpu_to_le32((sbsize
- sizeof(struct mdp_superblock_1
)) / 2);
1398 memset(sb
->dev_roles
, 0xff, MAX_SB_SIZE
- sizeof(struct mdp_superblock_1
));
1406 long long data_offset
;
1407 mdu_disk_info_t disk
;
1408 struct devinfo
*next
;
1411 /* Add a device to the superblock being created */
1412 static int add_to_super1(struct supertype
*st
, mdu_disk_info_t
*dk
,
1413 int fd
, char *devname
, unsigned long long data_offset
)
1415 struct mdp_superblock_1
*sb
= st
->sb
;
1416 __u16
*rp
= sb
->dev_roles
+ dk
->number
;
1417 struct devinfo
*di
, **dip
;
1419 if ((dk
->state
& 6) == 6) /* active, sync */
1420 *rp
= __cpu_to_le16(dk
->raid_disk
);
1421 else if ((dk
->state
& ~2) == 0) /* active or idle -> spare */
1426 if (dk
->number
>= (int)__le32_to_cpu(sb
->max_dev
) &&
1427 __le32_to_cpu(sb
->max_dev
) < MAX_DEVS
)
1428 sb
->max_dev
= __cpu_to_le32(dk
->number
+1);
1430 sb
->dev_number
= __cpu_to_le32(dk
->number
);
1431 sb
->devflags
= 0; /* don't copy another disks flags */
1432 sb
->sb_csum
= calc_sb_1_csum(sb
);
1434 dip
= (struct devinfo
**)&st
->info
;
1436 dip
= &(*dip
)->next
;
1437 di
= xmalloc(sizeof(struct devinfo
));
1439 di
->devname
= devname
;
1441 di
->data_offset
= data_offset
;
1449 static void locate_bitmap1(struct supertype
*st
, int fd
);
1451 static int store_super1(struct supertype
*st
, int fd
)
1453 struct mdp_superblock_1
*sb
= st
->sb
;
1454 unsigned long long sb_offset
;
1455 struct align_fd afd
;
1457 unsigned long long dsize
;
1459 if (!get_dev_size(fd
, NULL
, &dsize
))
1470 * Calculate the position of the superblock.
1471 * It is always aligned to a 4K boundary and
1472 * depending on minor_version, it can be:
1473 * 0: At least 8K, but less than 12K, from end of device
1474 * 1: At start of device
1475 * 2: 4K from start of device.
1477 switch(st
->minor_version
) {
1481 sb_offset
&= ~(4*2-1);
1493 if (sb_offset
!= __le64_to_cpu(sb
->super_offset
) &&
1494 0 != __le64_to_cpu(sb
->super_offset
)
1496 pr_err("internal error - sb_offset is wrong\n");
1500 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL)
1503 sbsize
= ROUND_UP(sizeof(*sb
) + 2 * __le32_to_cpu(sb
->max_dev
), 512);
1505 if (awrite(&afd
, sb
, sbsize
) != sbsize
)
1508 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1509 struct bitmap_super_s
*bm
= (struct bitmap_super_s
*)
1510 (((char*)sb
)+MAX_SB_SIZE
);
1511 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
) {
1512 locate_bitmap1(st
, fd
);
1513 if (awrite(&afd
, bm
, sizeof(*bm
)) != sizeof(*bm
))
1521 static int load_super1(struct supertype
*st
, int fd
, char *devname
);
1523 static unsigned long choose_bm_space(unsigned long devsize
)
1525 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
1526 * if bigger than 200Gig, save 128k
1527 * NOTE: result must be multiple of 4K else bad things happen
1528 * on 4K-sector devices.
1530 if (devsize
< 64*2) return 0;
1531 if (devsize
- 64*2 >= 200*1024*1024*2)
1533 if (devsize
- 4*2 > 8*1024*1024*2)
1538 static void free_super1(struct supertype
*st
);
1541 static int write_init_super1(struct supertype
*st
)
1543 struct mdp_superblock_1
*sb
= st
->sb
;
1544 struct supertype
*refst
;
1547 unsigned long long bm_space
;
1549 unsigned long long dsize
, array_size
;
1550 unsigned long long sb_offset
;
1551 unsigned long long data_offset
;
1553 for (di
= st
->info
; di
; di
= di
->next
) {
1554 if (di
->disk
.state
& (1 << MD_DISK_FAULTY
))
1559 while (Kill(di
->devname
, NULL
, 0, -1, 1) == 0)
1562 sb
->dev_number
= __cpu_to_le32(di
->disk
.number
);
1563 if (di
->disk
.state
& (1<<MD_DISK_WRITEMOSTLY
))
1564 sb
->devflags
|= WriteMostly1
;
1566 sb
->devflags
&= ~WriteMostly1
;
1568 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1569 read(rfd
, sb
->device_uuid
, 16) != 16) {
1570 __u32 r
[4] = {random(), random(), random(), random()};
1571 memcpy(sb
->device_uuid
, r
, 16);
1578 refst
= dup_super(st
);
1579 if (load_super1(refst
, di
->fd
, NULL
)==0) {
1580 struct mdp_superblock_1
*refsb
= refst
->sb
;
1582 memcpy(sb
->device_uuid
, refsb
->device_uuid
, 16);
1583 if (memcmp(sb
->set_uuid
, refsb
->set_uuid
, 16)==0) {
1584 /* same array, so preserve events and
1586 sb
->events
= refsb
->events
;
1587 /* bugs in 2.6.17 and earlier mean the
1588 * dev_number chosen in Manage must be preserved
1590 if (get_linux_version() >= 2006018)
1591 sb
->dev_number
= refsb
->dev_number
;
1597 if (!get_dev_size(di
->fd
, NULL
, &dsize
)) {
1610 * Calculate the position of the superblock.
1611 * It is always aligned to a 4K boundary and
1612 * depending on minor_version, it can be:
1613 * 0: At least 8K, but less than 12K, from end of device
1614 * 1: At start of device
1615 * 2: 4K from start of device.
1616 * data_offset has already been set.
1618 array_size
= __le64_to_cpu(sb
->size
);
1619 /* work out how much space we left for a bitmap,
1620 * Add 8 sectors for bad block log */
1621 bm_space
= choose_bm_space(array_size
) + 8;
1623 data_offset
= di
->data_offset
;
1624 if (data_offset
== INVALID_SECTORS
)
1625 data_offset
= st
->data_offset
;
1626 switch(st
->minor_version
) {
1628 if (data_offset
== INVALID_SECTORS
)
1632 sb_offset
&= ~(4*2-1);
1633 sb
->data_offset
= __cpu_to_le64(data_offset
);
1634 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1635 if (sb_offset
< array_size
+ bm_space
)
1636 bm_space
= sb_offset
- array_size
;
1637 sb
->data_size
= __cpu_to_le64(sb_offset
- bm_space
);
1638 if (bm_space
>= 8) {
1639 sb
->bblog_size
= __cpu_to_le16(8);
1640 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1644 sb
->super_offset
= __cpu_to_le64(0);
1645 if (data_offset
== INVALID_SECTORS
)
1648 sb
->data_offset
= __cpu_to_le64(data_offset
);
1649 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
1650 if (data_offset
>= 8 + 32*2 + 8) {
1651 sb
->bblog_size
= __cpu_to_le16(8);
1652 sb
->bblog_offset
= __cpu_to_le32(8 + 32*2);
1653 } else if (data_offset
>= 16) {
1654 sb
->bblog_size
= __cpu_to_le16(8);
1655 sb
->bblog_offset
= __cpu_to_le32(data_offset
-8);
1660 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1661 if (data_offset
== INVALID_SECTORS
)
1664 sb
->data_offset
= __cpu_to_le64(data_offset
);
1665 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
1666 if (data_offset
>= 16 + 32*2 + 8) {
1667 sb
->bblog_size
= __cpu_to_le16(8);
1668 sb
->bblog_offset
= __cpu_to_le32(8 + 32*2);
1669 } else if (data_offset
>= 16+16) {
1670 sb
->bblog_size
= __cpu_to_le16(8);
1671 /* '8' sectors for the bblog, and another '8'
1672 * because we want offset from superblock, not
1675 sb
->bblog_offset
= __cpu_to_le32(data_offset
-8-8);
1679 pr_err("Failed to write invalid metadata format 1.%i to %s\n",
1680 st
->minor_version
, di
->devname
);
1684 if (conf_get_create_info()->bblist
== 0) {
1686 sb
->bblog_offset
= 0;
1689 sb
->sb_csum
= calc_sb_1_csum(sb
);
1690 rv
= store_super1(st
, di
->fd
);
1691 if (rv
== 0 && (__le32_to_cpu(sb
->feature_map
) & 1))
1692 rv
= st
->ss
->write_bitmap(st
, di
->fd
);
1700 pr_err("Failed to write metadata to %s\n",
1707 static int compare_super1(struct supertype
*st
, struct supertype
*tst
)
1711 * 0 same, or first was empty, and second was copied
1712 * 1 second had wrong number
1714 * 3 wrong other info
1716 struct mdp_superblock_1
*first
= st
->sb
;
1717 struct mdp_superblock_1
*second
= tst
->sb
;
1719 if (second
->magic
!= __cpu_to_le32(MD_SB_MAGIC
))
1721 if (second
->major_version
!= __cpu_to_le32(1))
1725 if (posix_memalign((void**)&first
, 4096, SUPER1_SIZE
) != 0) {
1726 pr_err("could not allocate superblock\n");
1729 memcpy(first
, second
, SUPER1_SIZE
);
1733 if (memcmp(first
->set_uuid
, second
->set_uuid
, 16)!= 0)
1736 if (first
->ctime
!= second
->ctime
||
1737 first
->level
!= second
->level
||
1738 first
->layout
!= second
->layout
||
1739 first
->size
!= second
->size
||
1740 first
->chunksize
!= second
->chunksize
||
1741 first
->raid_disks
!= second
->raid_disks
)
1746 static int load_super1(struct supertype
*st
, int fd
, char *devname
)
1748 unsigned long long dsize
;
1749 unsigned long long sb_offset
;
1750 struct mdp_superblock_1
*super
;
1752 struct bitmap_super_s
*bsb
;
1753 struct misc_dev_info
*misc
;
1754 struct align_fd afd
;
1760 if (st
->ss
== NULL
|| st
->minor_version
== -1) {
1762 struct supertype tst
;
1763 __u64 bestctime
= 0;
1764 /* guess... choose latest ctime */
1765 memset(&tst
, 0, sizeof(tst
));
1767 for (tst
.minor_version
= 0; tst
.minor_version
<= 2 ; tst
.minor_version
++) {
1768 switch(load_super1(&tst
, fd
, devname
)) {
1769 case 0: super
= tst
.sb
;
1770 if (bestvers
== -1 ||
1771 bestctime
< __le64_to_cpu(super
->ctime
)) {
1772 bestvers
= tst
.minor_version
;
1773 bestctime
= __le64_to_cpu(super
->ctime
);
1778 case 1: return 1; /*bad device */
1779 case 2: break; /* bad, try next */
1782 if (bestvers
!= -1) {
1784 tst
.minor_version
= bestvers
;
1786 tst
.max_devs
= MAX_DEVS
;
1787 rv
= load_super1(&tst
, fd
, devname
);
1794 if (!get_dev_size(fd
, devname
, &dsize
))
1800 pr_err("%s is too small for md: size is %llu sectors.\n",
1806 * Calculate the position of the superblock.
1807 * It is always aligned to a 4K boundary and
1808 * depending on minor_version, it can be:
1809 * 0: At least 8K, but less than 12K, from end of device
1810 * 1: At start of device
1811 * 2: 4K from start of device.
1813 switch(st
->minor_version
) {
1817 sb_offset
&= ~(4*2-1);
1829 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL) {
1831 pr_err("Cannot seek to superblock on %s: %s\n",
1832 devname
, strerror(errno
));
1836 if (posix_memalign((void**)&super
, 4096, SUPER1_SIZE
) != 0) {
1837 pr_err("could not allocate superblock\n");
1841 if (aread(&afd
, super
, MAX_SB_SIZE
) != MAX_SB_SIZE
) {
1843 pr_err("Cannot read superblock on %s\n",
1849 if (__le32_to_cpu(super
->magic
) != MD_SB_MAGIC
) {
1851 pr_err("No super block found on %s (Expected magic %08x, got %08x)\n",
1852 devname
, MD_SB_MAGIC
, __le32_to_cpu(super
->magic
));
1857 if (__le32_to_cpu(super
->major_version
) != 1) {
1859 pr_err("Cannot interpret superblock on %s - version is %d\n",
1860 devname
, __le32_to_cpu(super
->major_version
));
1864 if (__le64_to_cpu(super
->super_offset
) != sb_offset
) {
1866 pr_err("No superblock found on %s (super_offset is wrong)\n",
1873 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
1875 misc
= (struct misc_dev_info
*) (((char*)super
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
1876 misc
->device_size
= dsize
;
1877 if (st
->data_offset
== INVALID_SECTORS
)
1878 st
->data_offset
= __le64_to_cpu(super
->data_offset
);
1880 /* Now check on the bitmap superblock */
1881 if ((__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) == 0)
1883 /* Read the bitmap superblock and make sure it looks
1884 * valid. If it doesn't clear the bit. An --assemble --force
1885 * should get that written out.
1887 locate_bitmap1(st
, fd
);
1888 if (aread(&afd
, bsb
, 512) != 512)
1891 uuid_from_super1(st
, uuid
);
1892 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
1893 memcmp(bsb
->uuid
, uuid
, 16) != 0)
1898 super
->feature_map
= __cpu_to_le32(__le32_to_cpu(super
->feature_map
)
1899 & ~MD_FEATURE_BITMAP_OFFSET
);
1903 static struct supertype
*match_metadata_desc1(char *arg
)
1905 struct supertype
*st
= xcalloc(1, sizeof(*st
));
1907 st
->container_devnm
[0] = 0;
1909 st
->max_devs
= MAX_DEVS
;
1911 st
->data_offset
= INVALID_SECTORS
;
1912 /* leading zeros can be safely ignored. --detail generates them. */
1915 if (strcmp(arg
, "1.0") == 0 ||
1916 strcmp(arg
, "1.00") == 0) {
1917 st
->minor_version
= 0;
1920 if (strcmp(arg
, "1.1") == 0 ||
1921 strcmp(arg
, "1.01") == 0
1923 st
->minor_version
= 1;
1926 if (strcmp(arg
, "1.2") == 0 ||
1927 #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
1928 strcmp(arg
, "default") == 0 ||
1929 #endif /* DEFAULT_OLD_METADATA */
1930 strcmp(arg
, "1.02") == 0) {
1931 st
->minor_version
= 2;
1934 if (strcmp(arg
, "1") == 0 ||
1935 strcmp(arg
, "default") == 0) {
1936 st
->minor_version
= -1;
1944 /* find available size on device with this devsize, using
1945 * superblock type st, and reserving 'reserve' sectors for
1948 static __u64
avail_size1(struct supertype
*st
, __u64 devsize
,
1949 unsigned long long data_offset
)
1951 struct mdp_superblock_1
*super
= st
->sb
;
1958 if (__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
1959 /* hot-add. allow for actual size of bitmap */
1960 struct bitmap_super_s
*bsb
;
1961 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
1962 bmspace
= bitmap_sectors(bsb
);
1965 /* Allow space for bad block log */
1966 if (super
->bblog_size
)
1967 bbspace
= __le16_to_cpu(super
->bblog_size
);
1969 if (st
->minor_version
< 0)
1970 /* not specified, so time to set default */
1971 st
->minor_version
= 2;
1973 if (data_offset
== INVALID_SECTORS
)
1974 data_offset
= st
->data_offset
;
1976 if (data_offset
!= INVALID_SECTORS
)
1977 switch(st
->minor_version
) {
1979 return devsize
- data_offset
- 8*2 - bbspace
;
1982 return devsize
- data_offset
;
1989 switch(st
->minor_version
) {
1992 return ((devsize
- 8*2 - bbspace
) & ~(4*2-1));
1994 /* at start, 4K for superblock and possible bitmap */
1995 return devsize
- 4*2 - bbspace
;
1997 /* 4k from start, 4K for superblock and possible bitmap */
1998 return devsize
- (4+4)*2 - bbspace
;
2004 add_internal_bitmap1(struct supertype
*st
,
2005 int *chunkp
, int delay
, int write_behind
,
2006 unsigned long long size
,
2007 int may_change
, int major
)
2010 * If not may_change, then this is a 'Grow' without sysfs support for
2011 * bitmaps, and the bitmap must fit after the superblock at 1K offset.
2012 * If may_change, then this is create or a Grow with sysfs syupport,
2013 * and we can put the bitmap wherever we like.
2015 * size is in sectors, chunk is in bytes !!!
2018 unsigned long long bits
;
2019 unsigned long long max_bits
;
2020 unsigned long long min_chunk
;
2022 long bbl_offset
, bbl_size
;
2023 unsigned long long chunk
= *chunkp
;
2026 struct mdp_superblock_1
*sb
= st
->sb
;
2027 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
2030 if (__le64_to_cpu(sb
->data_size
) == 0)
2031 /* Must be creating the array, else data_size would be non-zero */
2033 switch(st
->minor_version
) {
2035 /* either 3K after the superblock (when hot-add),
2036 * or some amount of space before.
2039 /* We are creating array, so we *know* how much room has
2044 room
= choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2046 room
= __le64_to_cpu(sb
->super_offset
)
2047 - __le64_to_cpu(sb
->data_offset
)
2048 - __le64_to_cpu(sb
->data_size
);
2049 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2052 bbl_offset
= (__s32
)__le32_to_cpu(sb
->bblog_offset
);
2053 if (bbl_size
< -bbl_offset
)
2054 bbl_size
= -bbl_offset
;
2056 if (!may_change
|| (room
< 3*2 &&
2057 __le32_to_cpu(sb
->max_dev
) <= 384)) {
2062 offset
= 0; /* means movable offset */
2067 case 2: /* between superblock and data */
2071 room
= choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2073 room
= __le64_to_cpu(sb
->data_offset
)
2074 - __le64_to_cpu(sb
->super_offset
);
2075 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2077 room
= __le32_to_cpu(sb
->bblog_offset
) + bbl_size
;
2082 room
-= 2; /* Leave 1K for superblock */
2086 room
-= 4*2; /* leave 4K for superblock */
2096 if (chunk
== UnSet
&& room
> 128*2)
2097 /* Limit to 128K of bitmap when chunk size not requested */
2101 /* No room for a bitmap */
2104 max_bits
= (room
* 512 - sizeof(bitmap_super_t
)) * 8;
2106 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
2107 bits
= (size
*512)/min_chunk
+1;
2108 while (bits
> max_bits
) {
2112 if (chunk
== UnSet
) {
2113 /* For practical purpose, 64Meg is a good
2114 * default chunk size for internal bitmaps.
2117 if (chunk
< 64*1024*1024)
2118 chunk
= 64*1024*1024;
2119 } else if (chunk
< min_chunk
)
2120 return 0; /* chunk size too small */
2121 if (chunk
== 0) /* rounding problem */
2125 /* start bitmap on a 4K boundary with enough space for
2128 bits
= (size
*512) / chunk
+ 1;
2129 room
= ((bits
+7)/8 + sizeof(bitmap_super_t
) +4095)/4096;
2130 room
*= 8; /* convert 4K blocks to sectors */
2131 offset
= -room
- bbl_size
;
2134 sb
->bitmap_offset
= (int32_t)__cpu_to_le32(offset
);
2136 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
)
2137 | MD_FEATURE_BITMAP_OFFSET
);
2138 memset(bms
, 0, sizeof(*bms
));
2139 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
2140 bms
->version
= __cpu_to_le32(major
);
2141 uuid_from_super1(st
, uuid
);
2142 memcpy(bms
->uuid
, uuid
, 16);
2143 bms
->chunksize
= __cpu_to_le32(chunk
);
2144 bms
->daemon_sleep
= __cpu_to_le32(delay
);
2145 bms
->sync_size
= __cpu_to_le64(size
);
2146 bms
->write_behind
= __cpu_to_le32(write_behind
);
2152 static void locate_bitmap1(struct supertype
*st
, int fd
)
2154 unsigned long long offset
;
2155 struct mdp_superblock_1
*sb
;
2159 if (st
->ss
->load_super(st
, fd
, NULL
))
2160 return; /* no error I hope... */
2165 offset
= __le64_to_cpu(sb
->super_offset
);
2166 offset
+= (int32_t) __le32_to_cpu(sb
->bitmap_offset
);
2169 lseek64(fd
, offset
<<9, 0);
2172 static int write_bitmap1(struct supertype
*st
, int fd
)
2174 struct mdp_superblock_1
*sb
= st
->sb
;
2175 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+MAX_SB_SIZE
);
2179 struct align_fd afd
;
2184 locate_bitmap1(st
, fd
);
2186 if (posix_memalign(&buf
, 4096, 4096))
2190 /* Only the bitmap[0] should resync
2191 * whole device on initial assembly
2194 memset(buf
, 0x00, 4096);
2196 memset(buf
, 0xff, 4096);
2197 memcpy(buf
, (char *)bms
, sizeof(bitmap_super_t
));
2199 towrite
= __le64_to_cpu(bms
->sync_size
) / (__le32_to_cpu(bms
->chunksize
)>>9);
2200 towrite
= (towrite
+7) >> 3; /* bits to bytes */
2201 towrite
+= sizeof(bitmap_super_t
);
2202 /* we need the bitmaps to be at 4k boundary */
2203 towrite
= ROUND_UP(towrite
, 4096);
2204 while (towrite
> 0) {
2208 n
= awrite(&afd
, buf
, n
);
2214 memset(buf
, 0x00, 4096);
2216 memset(buf
, 0xff, 4096);
2223 } while (++i
< __le32_to_cpu(bms
->nodes
));
2229 static void free_super1(struct supertype
*st
)
2234 struct devinfo
*di
= st
->info
;
2235 st
->info
= di
->next
;
2244 static int validate_geometry1(struct supertype
*st
, int level
,
2245 int layout
, int raiddisks
,
2246 int *chunk
, unsigned long long size
,
2247 unsigned long long data_offset
,
2248 char *subdev
, unsigned long long *freesize
,
2251 unsigned long long ldsize
, devsize
;
2253 unsigned long long headroom
;
2256 if (level
== LEVEL_CONTAINER
) {
2258 pr_err("1.x metadata does not support containers\n");
2261 if (*chunk
== UnSet
)
2262 *chunk
= DEFAULT_CHUNK
;
2267 if (st
->minor_version
< 0)
2268 /* not specified, so time to set default */
2269 st
->minor_version
= 2;
2271 fd
= open(subdev
, O_RDONLY
|O_EXCL
, 0);
2274 pr_err("super1.x cannot open %s: %s\n",
2275 subdev
, strerror(errno
));
2279 if (!get_dev_size(fd
, subdev
, &ldsize
)) {
2285 devsize
= ldsize
>> 9;
2291 /* creating: allow suitable space for bitmap */
2292 bmspace
= choose_bm_space(devsize
);
2294 if (data_offset
== INVALID_SECTORS
)
2295 data_offset
= st
->data_offset
;
2296 if (data_offset
== INVALID_SECTORS
)
2297 switch (st
->minor_version
) {
2303 /* Choose data offset appropriate for this device
2304 * and use as default for whole array.
2305 * The data_offset must allow for bitmap space
2306 * and base metadata, should allow for some headroom
2307 * for reshape, and should be rounded to multiple
2309 * Headroom is limited to 128M, but aim for about 0.1%
2311 headroom
= 128*1024*2;
2312 while ((headroom
<< 10) > devsize
&&
2314 headroom
/ 2 >= ((unsigned)(*chunk
)*2)*2))
2316 data_offset
= 12*2 + bmspace
+ headroom
;
2317 #define ONE_MEG (2*1024)
2318 if (data_offset
> ONE_MEG
)
2319 data_offset
= (data_offset
/ ONE_MEG
) * ONE_MEG
;
2322 if (st
->data_offset
== INVALID_SECTORS
)
2323 st
->data_offset
= data_offset
;
2324 switch(st
->minor_version
) {
2325 case 0: /* metadata at end. Round down and subtract space to reserve */
2326 devsize
= (devsize
& ~(4ULL*2-1));
2327 /* space for metadata, bblog, bitmap */
2328 devsize
-= 8*2 + 8 + bmspace
;
2332 devsize
-= data_offset
;
2335 *freesize
= devsize
;
2338 #endif /* MDASSEMBLE */
2340 void *super1_make_v0(struct supertype
*st
, struct mdinfo
*info
, mdp_super_t
*sb0
)
2342 /* Create a v1.0 superblock based on 'info'*/
2344 struct mdp_superblock_1
*sb
;
2347 unsigned long long offset
;
2349 if (posix_memalign(&ret
, 4096, 1024) != 0)
2352 memset(ret
, 0, 1024);
2353 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
2354 sb
->major_version
= __cpu_to_le32(1);
2356 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
2357 sprintf(sb
->set_name
, "%d", sb0
->md_minor
);
2358 sb
->ctime
= __cpu_to_le32(info
->array
.ctime
+1);
2359 sb
->level
= __cpu_to_le32(info
->array
.level
);
2360 sb
->layout
= __cpu_to_le32(info
->array
.layout
);
2361 sb
->size
= __cpu_to_le64(info
->component_size
);
2362 sb
->chunksize
= __cpu_to_le32(info
->array
.chunk_size
/512);
2363 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
2364 if (info
->array
.level
> 0)
2365 sb
->data_size
= sb
->size
;
2367 sb
->data_size
= st
->ss
->avail_size(st
, st
->devsize
/512, 0);
2368 sb
->resync_offset
= MaxSector
;
2369 sb
->max_dev
= __cpu_to_le32(MD_SB_DISKS
);
2370 sb
->dev_number
= __cpu_to_le32(info
->disk
.number
);
2371 sb
->utime
= __cpu_to_le64(info
->array
.utime
);
2373 offset
= st
->devsize
/512 - 8*2;
2375 sb
->super_offset
= __cpu_to_le64(offset
);
2376 //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset);
2378 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
2379 read(rfd
, sb
->device_uuid
, 16) != 16) {
2380 __u32 r
[4] = {random(), random(), random(), random()};
2381 memcpy(sb
->device_uuid
, r
, 16);
2386 for (i
= 0; i
< MD_SB_DISKS
; i
++) {
2387 int state
= sb0
->disks
[i
].state
;
2388 sb
->dev_roles
[i
] = 0xFFFF;
2389 if ((state
& (1<<MD_DISK_SYNC
)) &&
2390 !(state
& (1<<MD_DISK_FAULTY
)))
2391 sb
->dev_roles
[i
] = __cpu_to_le16(sb0
->disks
[i
].raid_disk
);
2393 sb
->sb_csum
= calc_sb_1_csum(sb
);
2397 struct superswitch super1
= {
2399 .examine_super
= examine_super1
,
2400 .brief_examine_super
= brief_examine_super1
,
2401 .export_examine_super
= export_examine_super1
,
2402 .detail_super
= detail_super1
,
2403 .brief_detail_super
= brief_detail_super1
,
2404 .export_detail_super
= export_detail_super1
,
2405 .write_init_super
= write_init_super1
,
2406 .validate_geometry
= validate_geometry1
,
2407 .add_to_super
= add_to_super1
,
2408 .examine_badblocks
= examine_badblocks_super1
,
2409 .copy_metadata
= copy_metadata1
,
2411 .match_home
= match_home1
,
2412 .uuid_from_super
= uuid_from_super1
,
2413 .getinfo_super
= getinfo_super1
,
2414 .container_content
= container_content1
,
2415 .update_super
= update_super1
,
2416 .init_super
= init_super1
,
2417 .store_super
= store_super1
,
2418 .compare_super
= compare_super1
,
2419 .load_super
= load_super1
,
2420 .match_metadata_desc
= match_metadata_desc1
,
2421 .avail_size
= avail_size1
,
2422 .add_internal_bitmap
= add_internal_bitmap1
,
2423 .locate_bitmap
= locate_bitmap1
,
2424 .write_bitmap
= write_bitmap1
,
2425 .free_super
= free_super1
,
2426 #if __BYTE_ORDER == BIG_ENDIAN