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 */
72 __u64 recovery_offset
;/* sectors before this offset (from data_offset) have been recovered */
73 __u64 journal_tail
;/* journal tail of journal device (from data_offset) */
75 __u32 dev_number
; /* permanent identifier of this device - not role in raid */
76 __u32 cnt_corrected_read
; /* number of read errors that were corrected by re-writing */
77 __u8 device_uuid
[16]; /* user-space setable, ignored by kernel */
78 __u8 devflags
; /* per-device flags. Only one defined...*/
79 #define WriteMostly1 1 /* mask for writemostly flag in above */
80 /* bad block log. If there are any bad blocks the feature flag is set.
81 * if offset and size are non-zero, that space is reserved and available.
83 __u8 bblog_shift
; /* shift from sectors to block size for badblocklist */
84 __u16 bblog_size
; /* number of sectors reserved for badblocklist */
85 __u32 bblog_offset
; /* sector offset from superblock to bblog, signed */
87 /* array state information - 64 bytes */
88 __u64 utime
; /* 40 bits second, 24 btes microseconds */
89 __u64 events
; /* incremented when superblock updated */
90 __u64 resync_offset
; /* data before this offset (from data_offset) known to be in sync */
91 __u32 sb_csum
; /* checksum upto dev_roles[max_dev] */
92 __u32 max_dev
; /* size of dev_roles[] array to consider */
93 __u8 pad3
[64-32]; /* set to 0 when writing */
95 /* device state information. Indexed by dev_number.
97 * Note there are no per-device state flags. State information is rolled
98 * into the 'roles' value. If a device is spare or faulty, then it doesn't
99 * have a meaningful role.
101 __u16 dev_roles
[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
104 #define MAX_SB_SIZE 4096
105 /* bitmap super size is 256, but we round up to a sector for alignment */
106 #define BM_SUPER_SIZE 512
107 #define MAX_DEVS ((int)(MAX_SB_SIZE - sizeof(struct mdp_superblock_1)) / 2)
108 #define SUPER1_SIZE (MAX_SB_SIZE + BM_SUPER_SIZE \
109 + sizeof(struct misc_dev_info))
111 struct misc_dev_info
{
115 /* feature_map bits */
116 #define MD_FEATURE_BITMAP_OFFSET 1
117 #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
120 #define MD_FEATURE_RESHAPE_ACTIVE 4
121 #define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */
122 #define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an
123 * active device with same 'role'.
124 * 'recovery_offset' is also set.
126 #define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number
127 * of devices, but is going
130 #define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */
131 #define MD_FEATURE_BITMAP_VERSIONED 256 /* bitmap version number checked properly */
132 #define MD_FEATURE_JOURNAL 512 /* support write journal */
133 #define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \
134 |MD_FEATURE_RECOVERY_OFFSET \
135 |MD_FEATURE_RESHAPE_ACTIVE \
136 |MD_FEATURE_BAD_BLOCKS \
137 |MD_FEATURE_REPLACEMENT \
138 |MD_FEATURE_RESHAPE_BACKWARDS \
139 |MD_FEATURE_NEW_OFFSET \
140 |MD_FEATURE_BITMAP_VERSIONED \
141 |MD_FEATURE_JOURNAL \
144 /* return how many bytes are needed for bitmap, for cluster-md each node
145 * should have it's own bitmap */
146 static unsigned int calc_bitmap_size(bitmap_super_t
*bms
, unsigned int boundary
)
148 unsigned long long bits
, bytes
;
150 bits
= __le64_to_cpu(bms
->sync_size
) / (__le32_to_cpu(bms
->chunksize
)>>9);
151 bytes
= (bits
+7) >> 3;
152 bytes
+= sizeof(bitmap_super_t
);
153 bytes
= ROUND_UP(bytes
, boundary
);
158 static unsigned int calc_sb_1_csum(struct mdp_superblock_1
* sb
)
160 unsigned int disk_csum
, csum
;
161 unsigned long long newcsum
;
162 int size
= sizeof(*sb
) + __le32_to_cpu(sb
->max_dev
)*2;
163 unsigned int *isuper
= (unsigned int*)sb
;
165 /* make sure I can count... */
166 if (offsetof(struct mdp_superblock_1
,data_offset
) != 128 ||
167 offsetof(struct mdp_superblock_1
, utime
) != 192 ||
168 sizeof(struct mdp_superblock_1
) != 256) {
169 fprintf(stderr
, "WARNING - superblock isn't sized correctly\n");
172 disk_csum
= sb
->sb_csum
;
175 for (; size
>=4; size
-= 4 ) {
176 newcsum
+= __le32_to_cpu(*isuper
);
181 newcsum
+= __le16_to_cpu(*(unsigned short*) isuper
);
183 csum
= (newcsum
& 0xffffffff) + (newcsum
>> 32);
184 sb
->sb_csum
= disk_csum
;
185 return __cpu_to_le32(csum
);
189 * Information related to file descriptor used for aligned reads/writes.
190 * Cache the block size.
197 static void init_afd(struct align_fd
*afd
, int fd
)
201 if (ioctl(afd
->fd
, BLKSSZGET
, &afd
->blk_sz
) != 0)
205 static char abuf
[4096+4096];
206 static int aread(struct align_fd
*afd
, void *buf
, int len
)
209 * On devices with a 4K sector size, we need to read
210 * the full sector and copy relevant bits into
219 if (!bsize
|| bsize
> 4096 || len
> 4096) {
221 fprintf(stderr
, "WARNING - aread() called with invalid block size\n");
224 b
= ROUND_UP_PTR((char *)abuf
, 4096);
226 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
228 n
= read(afd
->fd
, b
, iosize
);
231 lseek(afd
->fd
, len
- n
, 1);
238 static int awrite(struct align_fd
*afd
, void *buf
, int len
)
241 * On devices with a 4K sector size, we need to write
242 * the full sector. We pre-read if the sector is larger
244 * The address must be sector-aligned.
251 if (!bsize
|| bsize
> 4096 || len
> 4096) {
253 fprintf(stderr
, "WARNING - awrite() called with invalid block size\n");
256 b
= ROUND_UP_PTR((char *)abuf
, 4096);
258 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
262 n
= read(afd
->fd
, b
, iosize
);
265 lseek(afd
->fd
, -n
, 1);
269 n
= write(afd
->fd
, b
, iosize
);
272 lseek(afd
->fd
, len
- n
, 1);
277 static void examine_super1(struct supertype
*st
, char *homehost
)
279 struct mdp_superblock_1
*sb
= st
->sb
;
280 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+MAX_SB_SIZE
);
287 int l
= homehost
? strlen(homehost
) : 0;
289 unsigned long long sb_offset
;
292 printf(" Magic : %08x\n", __le32_to_cpu(sb
->magic
));
293 printf(" Version : 1");
294 sb_offset
= __le64_to_cpu(sb
->super_offset
);
297 else if (sb_offset
<= 8)
301 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb
->feature_map
));
302 printf(" Array UUID : ");
303 for (i
=0; i
<16; i
++) {
304 if ((i
&3)==0 && i
!= 0) printf(":");
305 printf("%02x", sb
->set_uuid
[i
]);
308 printf(" Name : %.32s", sb
->set_name
);
309 if (l
> 0 && l
< 32 &&
310 sb
->set_name
[l
] == ':' &&
311 strncmp(sb
->set_name
, homehost
, l
) == 0)
312 printf(" (local to host %s)", homehost
);
315 printf(" Cluster Name : %-64s\n", bms
->cluster_name
);
316 atime
= __le64_to_cpu(sb
->ctime
) & 0xFFFFFFFFFFULL
;
317 printf(" Creation Time : %.24s\n", ctime(&atime
));
318 c
=map_num(pers
, __le32_to_cpu(sb
->level
));
319 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
320 printf(" Raid Devices : %d\n", __le32_to_cpu(sb
->raid_disks
));
322 printf(" Avail Dev Size : %llu%s\n",
323 (unsigned long long)__le64_to_cpu(sb
->data_size
),
324 human_size(__le64_to_cpu(sb
->data_size
)<<9));
325 if (__le32_to_cpu(sb
->level
) > 0) {
326 int ddsks
= 0, ddsks_denom
= 1;
327 switch(__le32_to_cpu(sb
->level
)) {
328 case 1: ddsks
=1;break;
330 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
331 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
333 layout
= __le32_to_cpu(sb
->layout
);
334 ddsks
= __le32_to_cpu(sb
->raid_disks
);
335 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
338 long long asize
= __le64_to_cpu(sb
->size
);
339 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
340 printf(" Array Size : %llu%s\n",
341 asize
>> 10, human_size(asize
));
343 if (sb
->size
!= sb
->data_size
)
344 printf(" Used Dev Size : %llu%s\n",
345 (unsigned long long)__le64_to_cpu(sb
->size
),
346 human_size(__le64_to_cpu(sb
->size
)<<9));
349 printf(" Data Offset : %llu sectors\n",
350 (unsigned long long)__le64_to_cpu(sb
->data_offset
));
351 if (sb
->new_offset
&&
352 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
)) {
353 unsigned long long offset
= __le64_to_cpu(sb
->data_offset
);
354 offset
+= (signed)(int32_t)__le32_to_cpu(sb
->new_offset
);
355 printf(" New Offset : %llu sectors\n", offset
);
357 printf(" Super Offset : %llu sectors\n",
358 (unsigned long long)__le64_to_cpu(sb
->super_offset
));
359 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_RECOVERY_OFFSET
)
360 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb
->recovery_offset
));
362 st
->ss
->getinfo_super(st
, &info
, NULL
);
363 if (info
.space_after
!= 1 &&
364 !(__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
))
365 printf(" Unused Space : before=%llu sectors, after=%llu sectors\n",
366 info
.space_before
, info
.space_after
);
368 printf(" State : %s\n", (__le64_to_cpu(sb
->resync_offset
)+1)? "active":"clean");
369 printf(" Device UUID : ");
370 for (i
=0; i
<16; i
++) {
371 if ((i
&3)==0 && i
!= 0) printf(":");
372 printf("%02x", sb
->device_uuid
[i
]);
376 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
377 printf("Internal Bitmap : %ld sectors from superblock\n",
378 (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
));
380 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)) {
381 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb
->reshape_position
)/2,
382 human_size(__le64_to_cpu(sb
->reshape_position
)<<9));
383 if (__le32_to_cpu(sb
->delta_disks
)) {
384 printf(" Delta Devices : %d", __le32_to_cpu(sb
->delta_disks
));
385 printf(" (%d->%d)\n",
386 __le32_to_cpu(sb
->raid_disks
)-__le32_to_cpu(sb
->delta_disks
),
387 __le32_to_cpu(sb
->raid_disks
));
388 if ((int)__le32_to_cpu(sb
->delta_disks
) < 0)
389 delta_extra
= -__le32_to_cpu(sb
->delta_disks
);
391 if (__le32_to_cpu(sb
->new_level
) != __le32_to_cpu(sb
->level
)) {
392 c
= map_num(pers
, __le32_to_cpu(sb
->new_level
));
393 printf(" New Level : %s\n", c
?c
:"-unknown-");
395 if (__le32_to_cpu(sb
->new_layout
) != __le32_to_cpu(sb
->layout
)) {
396 if (__le32_to_cpu(sb
->level
) == 5) {
397 c
= map_num(r5layout
, __le32_to_cpu(sb
->new_layout
));
398 printf(" New Layout : %s\n", c
?c
:"-unknown-");
400 if (__le32_to_cpu(sb
->level
) == 6) {
401 c
= map_num(r6layout
, __le32_to_cpu(sb
->new_layout
));
402 printf(" New Layout : %s\n", c
?c
:"-unknown-");
404 if (__le32_to_cpu(sb
->level
) == 10) {
405 printf(" New Layout :");
406 print_r10_layout(__le32_to_cpu(sb
->new_layout
));
410 if (__le32_to_cpu(sb
->new_chunk
) != __le32_to_cpu(sb
->chunksize
))
411 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb
->new_chunk
)/2);
416 if (sb
->devflags
& WriteMostly1
)
417 printf(" write-mostly");
421 atime
= __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
;
422 printf(" Update Time : %.24s\n", ctime(&atime
));
424 if (sb
->bblog_size
&& sb
->bblog_offset
) {
425 printf(" Bad Block Log : %d entries available at offset %ld sectors",
426 __le16_to_cpu(sb
->bblog_size
)*512/8,
427 (long)(int32_t)__le32_to_cpu(sb
->bblog_offset
));
428 if (sb
->feature_map
&
429 __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
430 printf(" - bad blocks present.");
434 if (calc_sb_1_csum(sb
) == sb
->sb_csum
)
435 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb
->sb_csum
));
437 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb
->sb_csum
),
438 __le32_to_cpu(calc_sb_1_csum(sb
)));
439 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb
->events
));
441 if (__le32_to_cpu(sb
->level
) == 5) {
442 c
= map_num(r5layout
, __le32_to_cpu(sb
->layout
));
443 printf(" Layout : %s\n", c
?c
:"-unknown-");
445 if (__le32_to_cpu(sb
->level
) == 6) {
446 c
= map_num(r6layout
, __le32_to_cpu(sb
->layout
));
447 printf(" Layout : %s\n", c
?c
:"-unknown-");
449 if (__le32_to_cpu(sb
->level
) == 10) {
450 int lo
= __le32_to_cpu(sb
->layout
);
452 print_r10_layout(lo
);
455 switch(__le32_to_cpu(sb
->level
)) {
461 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
464 printf(" Rounding : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
470 /* This turns out to just be confusing */
471 printf(" Array Slot : %d (", __le32_to_cpu(sb
->dev_number
));
472 for (i
= __le32_to_cpu(sb
->max_dev
); i
> 0 ; i
--)
473 if (__le16_to_cpu(sb
->dev_roles
[i
-1]) != MD_DISK_ROLE_SPARE
)
475 for (d
=0; d
< i
; d
++) {
476 int role
= __le16_to_cpu(sb
->dev_roles
[d
]);
478 if (role
== MD_DISK_ROLE_SPARE
) printf("empty");
479 else if(role
== MD_DISK_ROLE_FAULTY
) printf("failed");
480 else printf("%d", role
);
484 printf(" Device Role : ");
485 d
= __le32_to_cpu(sb
->dev_number
);
486 if (d
< __le32_to_cpu(sb
->max_dev
))
487 role
= __le16_to_cpu(sb
->dev_roles
[d
]);
489 role
= MD_DISK_ROLE_SPARE
;
490 if (role
>= MD_DISK_ROLE_FAULTY
)
492 else if (role
== MD_DISK_ROLE_JOURNAL
)
494 else if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_REPLACEMENT
))
495 printf("Replacement device %d\n", role
);
497 printf("Active device %d\n", role
);
499 printf(" Array State : ");
500 for (d
=0; d
<__le32_to_cpu(sb
->raid_disks
) + delta_extra
; d
++) {
503 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
504 unsigned int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
518 /* This is confusing too */
520 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
521 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
522 if (role
== MD_DISK_ROLE_FAULTY
)
525 if (faulty
) printf(" %d failed", faulty
);
527 printf(" ('A' == active, '.' == missing, 'R' == replacing)");
531 static void brief_examine_super1(struct supertype
*st
, int verbose
)
533 struct mdp_superblock_1
*sb
= st
->sb
;
535 unsigned long long sb_offset
;
537 char *c
=map_num(pers
, __le32_to_cpu(sb
->level
));
539 nm
= strchr(sb
->set_name
, ':');
542 else if (sb
->set_name
[0])
554 printf(" level=%s", c
);
555 sb_offset
= __le64_to_cpu(sb
->super_offset
);
557 printf(" metadata=1.1 ");
558 else if (sb_offset
<= 8)
559 printf(" metadata=1.2 ");
561 printf(" metadata=1.0 ");
563 printf("num-devices=%d ", __le32_to_cpu(sb
->raid_disks
));
565 for (i
=0; i
<16; i
++) {
566 if ((i
&3)==0 && i
!= 0) printf(":");
567 printf("%02x", sb
->set_uuid
[i
]);
569 if (sb
->set_name
[0]) {
571 print_quoted(sb
->set_name
);
576 static void export_examine_super1(struct supertype
*st
)
578 struct mdp_superblock_1
*sb
= st
->sb
;
583 printf("MD_LEVEL=%s\n", map_num(pers
, __le32_to_cpu(sb
->level
)));
584 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb
->raid_disks
));
586 if (sb
->set_name
[i
] == '\n' ||
587 sb
->set_name
[i
] == '\0') {
592 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
593 if (__le32_to_cpu(sb
->level
) > 0) {
594 int ddsks
= 0, ddsks_denom
= 1;
595 switch(__le32_to_cpu(sb
->level
)) {
596 case 1: ddsks
=1;break;
598 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
599 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
601 layout
= __le32_to_cpu(sb
->layout
);
602 ddsks
= __le32_to_cpu(sb
->raid_disks
);
603 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
606 long long asize
= __le64_to_cpu(sb
->size
);
607 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
608 printf("MD_ARRAY_SIZE=%s\n",human_size_brief(asize
,JEDEC
));
612 for (i
=0; i
<16; i
++) {
613 if ((i
&3)==0 && i
!= 0) printf(":");
614 printf("%02x", sb
->set_uuid
[i
]);
617 printf("MD_UPDATE_TIME=%llu\n",
618 __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
);
619 printf("MD_DEV_UUID=");
620 for (i
=0; i
<16; i
++) {
621 if ((i
&3)==0 && i
!= 0) printf(":");
622 printf("%02x", sb
->device_uuid
[i
]);
625 printf("MD_EVENTS=%llu\n",
626 (unsigned long long)__le64_to_cpu(sb
->events
));
629 static int copy_metadata1(struct supertype
*st
, int from
, int to
)
631 /* Read superblock. If it looks good, write it out.
632 * Then if a bitmap is present, copy that.
633 * And if a bad-block-list is present, copy that too.
636 unsigned long long dsize
, sb_offset
;
637 const int bufsize
= 4*1024;
638 struct mdp_superblock_1 super
, *sb
;
640 if (posix_memalign(&buf
, 4096, bufsize
) != 0)
643 if (!get_dev_size(from
, NULL
, &dsize
))
649 switch(st
->minor_version
) {
653 sb_offset
&= ~(4*2-1);
665 if (lseek64(from
, sb_offset
<< 9, 0) < 0LL)
667 if (read(from
, buf
, bufsize
) != bufsize
)
671 super
= *sb
; // save most of sb for when we reuse buf
673 if (__le32_to_cpu(super
.magic
) != MD_SB_MAGIC
||
674 __le32_to_cpu(super
.major_version
) != 1 ||
675 __le64_to_cpu(super
.super_offset
) != sb_offset
||
676 calc_sb_1_csum(sb
) != super
.sb_csum
)
679 if (lseek64(to
, sb_offset
<< 9, 0) < 0LL)
681 if (write(to
, buf
, bufsize
) != bufsize
)
684 if (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
685 unsigned long long bitmap_offset
= sb_offset
;
686 int bytes
= 4096; // just an estimate.
688 struct align_fd afrom
, ato
;
690 init_afd(&afrom
, from
);
693 bitmap_offset
+= (int32_t)__le32_to_cpu(super
.bitmap_offset
);
695 if (lseek64(from
, bitmap_offset
<<9, 0) < 0)
697 if (lseek64(to
, bitmap_offset
<<9, 0) < 0)
700 for (written
= 0; written
< bytes
; ) {
701 int n
= bytes
- written
;
704 if (aread(&afrom
, buf
, n
) != n
)
707 /* have the header, can calculate
708 * correct bitmap bytes */
711 bytes
= calc_bitmap_size(bms
, 512);
715 if (awrite(&ato
, buf
, n
) != n
)
721 if (super
.bblog_size
!= 0 &&
722 __le32_to_cpu(super
.bblog_size
) <= 100 &&
723 super
.bblog_offset
!= 0 &&
724 (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BAD_BLOCKS
))) {
725 /* There is a bad block log */
726 unsigned long long bb_offset
= sb_offset
;
727 int bytes
= __le32_to_cpu(super
.bblog_size
) * 512;
729 struct align_fd afrom
, ato
;
731 init_afd(&afrom
, from
);
734 bb_offset
+= (int32_t)__le32_to_cpu(super
.bblog_offset
);
736 if (lseek64(from
, bb_offset
<<9, 0) < 0)
738 if (lseek64(to
, bb_offset
<<9, 0) < 0)
741 for (written
= 0; written
< bytes
; ) {
742 int n
= bytes
- written
;
745 if (aread(&afrom
, buf
, n
) != n
)
748 if (awrite(&ato
, buf
, n
) != n
)
762 static void detail_super1(struct supertype
*st
, char *homehost
)
764 struct mdp_superblock_1
*sb
= st
->sb
;
765 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
767 int l
= homehost
? strlen(homehost
) : 0;
769 printf(" Name : %.32s", sb
->set_name
);
770 if (l
> 0 && l
< 32 &&
771 sb
->set_name
[l
] == ':' &&
772 strncmp(sb
->set_name
, homehost
, l
) == 0)
773 printf(" (local to host %s)", homehost
);
775 printf("\n Cluster Name : %-64s", bms
->cluster_name
);
776 printf("\n UUID : ");
777 for (i
=0; i
<16; i
++) {
778 if ((i
&3)==0 && i
!= 0) printf(":");
779 printf("%02x", sb
->set_uuid
[i
]);
781 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb
->events
));
784 static void brief_detail_super1(struct supertype
*st
)
786 struct mdp_superblock_1
*sb
= st
->sb
;
789 if (sb
->set_name
[0]) {
791 print_quoted(sb
->set_name
);
794 for (i
=0; i
<16; i
++) {
795 if ((i
&3)==0 && i
!= 0) printf(":");
796 printf("%02x", sb
->set_uuid
[i
]);
800 static void export_detail_super1(struct supertype
*st
)
802 struct mdp_superblock_1
*sb
= st
->sb
;
807 if (sb
->set_name
[i
] == '\n' ||
808 sb
->set_name
[i
] == '\0') {
813 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
816 static int examine_badblocks_super1(struct supertype
*st
, int fd
, char *devname
)
818 struct mdp_superblock_1
*sb
= st
->sb
;
819 unsigned long long offset
;
824 if (!sb
->bblog_size
|| __le32_to_cpu(sb
->bblog_size
) > 100
825 || !sb
->bblog_offset
){
826 printf("No bad-blocks list configured on %s\n", devname
);
829 if ((sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
831 printf("Bad-blocks list is empty in %s\n", devname
);
835 size
= __le32_to_cpu(sb
->bblog_size
)* 512;
836 if (posix_memalign((void**)&bbl
, 4096, size
) != 0) {
837 pr_err("could not allocate badblocks list\n");
840 offset
= __le64_to_cpu(sb
->super_offset
) +
841 (int)__le32_to_cpu(sb
->bblog_offset
);
843 if (lseek64(fd
, offset
, 0) < 0) {
844 pr_err("Cannot seek to bad-blocks list\n");
847 if (read(fd
, bbl
, size
) != size
) {
848 pr_err("Cannot read bad-blocks list\n");
851 /* 64bits per entry. 10 bits is block-count, 54 bits is block
852 * offset. Blocks are sectors unless bblog->shift makes them bigger
855 printf("Bad-blocks on %s:\n", devname
);
856 for (i
= 0; i
< size
/8; i
++, bbp
++) {
857 __u64 bb
= __le64_to_cpu(*bbp
);
858 int count
= bb
& 0x3ff;
859 unsigned long long sector
= bb
>> 10;
864 sector
<<= sb
->bblog_shift
;
865 count
<<= sb
->bblog_shift
;
867 printf("%20llu for %d sectors\n", sector
, count
);
874 static int match_home1(struct supertype
*st
, char *homehost
)
876 struct mdp_superblock_1
*sb
= st
->sb
;
877 int l
= homehost
? strlen(homehost
) : 0;
879 return (l
> 0 && l
< 32 &&
880 sb
->set_name
[l
] == ':' &&
881 strncmp(sb
->set_name
, homehost
, l
) == 0);
884 static void uuid_from_super1(struct supertype
*st
, int uuid
[4])
886 struct mdp_superblock_1
*super
= st
->sb
;
887 char *cuuid
= (char*)uuid
;
890 cuuid
[i
] = super
->set_uuid
[i
];
893 static void getinfo_super1(struct supertype
*st
, struct mdinfo
*info
, char *map
)
895 struct mdp_superblock_1
*sb
= st
->sb
;
896 struct bitmap_super_s
*bsb
= (void*)(((char*)sb
)+MAX_SB_SIZE
);
897 struct misc_dev_info
*misc
= (void*)(((char*)sb
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
901 unsigned int map_disks
= info
->array
.raid_disks
;
902 unsigned long long super_offset
;
903 unsigned long long data_size
;
905 memset(info
, 0, sizeof(*info
));
906 info
->array
.major_version
= 1;
907 info
->array
.minor_version
= st
->minor_version
;
908 info
->array
.patch_version
= 0;
909 info
->array
.raid_disks
= __le32_to_cpu(sb
->raid_disks
);
910 info
->array
.level
= __le32_to_cpu(sb
->level
);
911 info
->array
.layout
= __le32_to_cpu(sb
->layout
);
912 info
->array
.md_minor
= -1;
913 info
->array
.ctime
= __le64_to_cpu(sb
->ctime
);
914 info
->array
.utime
= __le64_to_cpu(sb
->utime
);
915 info
->array
.chunk_size
= __le32_to_cpu(sb
->chunksize
)*512;
917 (__le64_to_cpu(sb
->resync_offset
) == MaxSector
)
919 if (__le32_to_cpu(bsb
->nodes
) > 1)
920 info
->array
.state
|= (1 << MD_SB_CLUSTERED
);
922 info
->data_offset
= __le64_to_cpu(sb
->data_offset
);
923 info
->component_size
= __le64_to_cpu(sb
->size
);
924 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
))
925 info
->bitmap_offset
= (int32_t)__le32_to_cpu(sb
->bitmap_offset
);
927 info
->disk
.major
= 0;
928 info
->disk
.minor
= 0;
929 info
->disk
.number
= __le32_to_cpu(sb
->dev_number
);
930 if (__le32_to_cpu(sb
->dev_number
) >= __le32_to_cpu(sb
->max_dev
) ||
931 __le32_to_cpu(sb
->dev_number
) >= MAX_DEVS
)
932 role
= MD_DISK_ROLE_FAULTY
;
934 role
= __le16_to_cpu(sb
->dev_roles
[__le32_to_cpu(sb
->dev_number
)]);
936 super_offset
= __le64_to_cpu(sb
->super_offset
);
937 if (info
->array
.level
<= 0)
938 data_size
= __le64_to_cpu(sb
->data_size
);
940 data_size
= __le64_to_cpu(sb
->size
);
941 if (info
->data_offset
< super_offset
) {
942 unsigned long long end
;
943 info
->space_before
= info
->data_offset
;
946 if (sb
->bblog_offset
&& sb
->bblog_size
) {
947 unsigned long long bboffset
= super_offset
;
948 bboffset
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
953 if (super_offset
+ info
->bitmap_offset
< end
)
954 end
= super_offset
+ info
->bitmap_offset
;
956 if (info
->data_offset
+ data_size
< end
)
957 info
->space_after
= end
- data_size
- info
->data_offset
;
959 info
->space_after
= 0;
961 unsigned long long earliest
;
962 earliest
= super_offset
+ (32+4)*2; /* match kernel */
963 if (info
->bitmap_offset
> 0) {
964 unsigned long long bmend
= info
->bitmap_offset
;
965 unsigned long long size
= __le64_to_cpu(bsb
->sync_size
);
966 size
/= __le32_to_cpu(bsb
->chunksize
) >> 9;
967 size
= (size
+ 7) >> 3;
968 size
+= sizeof(bitmap_super_t
);
969 size
= ROUND_UP(size
, 4096);
972 if (bmend
> earliest
)
975 if (sb
->bblog_offset
&& sb
->bblog_size
) {
976 unsigned long long bbend
= super_offset
;
977 bbend
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
978 bbend
+= __le32_to_cpu(sb
->bblog_size
);
979 if (bbend
> earliest
)
982 if (earliest
< info
->data_offset
)
983 info
->space_before
= info
->data_offset
- earliest
;
985 info
->space_before
= 0;
986 info
->space_after
= misc
->device_size
- data_size
- info
->data_offset
;
988 if (info
->space_before
== 0 && info
->space_after
== 0) {
989 /* It will look like we don't support data_offset changes,
990 * be we do - it's just that there is no room.
991 * A change that reduced the number of devices should
992 * still be allowed, so set the otherwise useless value of '1'
994 info
->space_after
= 1;
997 info
->disk
.raid_disk
= -1;
999 case MD_DISK_ROLE_SPARE
:
1000 info
->disk
.state
= 0; /* spare: not active, not sync, not faulty */
1002 case MD_DISK_ROLE_FAULTY
:
1003 info
->disk
.state
= 1; /* faulty */
1005 case MD_DISK_ROLE_JOURNAL
:
1006 info
->disk
.state
= (1 << MD_DISK_JOURNAL
);
1007 info
->disk
.raid_disk
= role
;
1008 info
->space_after
= (misc
->device_size
- info
->data_offset
) % 8; /* journal uses all 4kB blocks*/
1011 info
->disk
.state
= 6; /* active and in sync */
1012 info
->disk
.raid_disk
= role
;
1014 if (sb
->devflags
& WriteMostly1
)
1015 info
->disk
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
1016 info
->events
= __le64_to_cpu(sb
->events
);
1017 sprintf(info
->text_version
, "1.%d", st
->minor_version
);
1018 info
->safe_mode_delay
= 200;
1020 memcpy(info
->uuid
, sb
->set_uuid
, 16);
1022 strncpy(info
->name
, sb
->set_name
, 32);
1025 if ((__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_REPLACEMENT
)) {
1026 info
->disk
.state
&= ~(1 << MD_DISK_SYNC
);
1027 info
->disk
.state
|= 1 << MD_DISK_REPLACEMENT
;
1030 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET
))
1031 info
->recovery_start
= __le32_to_cpu(sb
->recovery_offset
);
1033 info
->recovery_start
= MaxSector
;
1035 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
1036 info
->reshape_active
= 1;
1037 if ((sb
->feature_map
& __le32_to_cpu(MD_FEATURE_NEW_OFFSET
)) &&
1038 sb
->new_offset
!= 0)
1039 info
->reshape_active
|= RESHAPE_NO_BACKUP
;
1040 info
->reshape_progress
= __le64_to_cpu(sb
->reshape_position
);
1041 info
->new_level
= __le32_to_cpu(sb
->new_level
);
1042 info
->delta_disks
= __le32_to_cpu(sb
->delta_disks
);
1043 info
->new_layout
= __le32_to_cpu(sb
->new_layout
);
1044 info
->new_chunk
= __le32_to_cpu(sb
->new_chunk
)<<9;
1045 if (info
->delta_disks
< 0)
1046 info
->array
.raid_disks
-= info
->delta_disks
;
1048 info
->reshape_active
= 0;
1050 info
->recovery_blocked
= info
->reshape_active
;
1053 for (i
=0; i
<map_disks
; i
++)
1055 for (i
= 0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
1056 role
= __le16_to_cpu(sb
->dev_roles
[i
]);
1057 if (/*role == MD_DISK_ROLE_SPARE || */role
< (unsigned) info
->array
.raid_disks
) {
1059 if (map
&& role
< map_disks
)
1064 info
->array
.working_disks
= working
;
1067 static struct mdinfo
*container_content1(struct supertype
*st
, char *subarray
)
1069 struct mdinfo
*info
;
1074 info
= xmalloc(sizeof(*info
));
1075 getinfo_super1(st
, info
, NULL
);
1079 static int update_super1(struct supertype
*st
, struct mdinfo
*info
,
1081 char *devname
, int verbose
,
1082 int uuid_set
, char *homehost
)
1084 /* NOTE: for 'assemble' and 'force' we need to return non-zero
1085 * if any change was made. For others, the return value is
1089 struct mdp_superblock_1
*sb
= st
->sb
;
1091 if (strcmp(update
, "homehost") == 0 &&
1093 /* Note that 'homehost' is special as it is really
1098 c
= strchr(sb
->set_name
, ':');
1100 strncpy(info
->name
, c
+1, 31 - (c
-sb
->set_name
));
1102 strncpy(info
->name
, sb
->set_name
, 32);
1106 if (strcmp(update
, "force-one")==0) {
1107 /* Not enough devices for a working array,
1108 * so bring this one up-to-date
1110 if (sb
->events
!= __cpu_to_le64(info
->events
))
1112 sb
->events
= __cpu_to_le64(info
->events
);
1113 } else if (strcmp(update
, "force-array")==0) {
1114 /* Degraded array and 'force' requests to
1115 * maybe need to mark it 'clean'.
1117 switch(__le32_to_cpu(sb
->level
)) {
1118 case 5: case 4: case 6:
1119 /* need to force clean */
1120 if (sb
->resync_offset
!= MaxSector
)
1122 sb
->resync_offset
= MaxSector
;
1124 } else if (strcmp(update
, "assemble")==0) {
1125 int d
= info
->disk
.number
;
1127 if (info
->disk
.state
& (1<<MD_DISK_ACTIVE
))
1128 want
= info
->disk
.raid_disk
;
1130 want
= MD_DISK_ROLE_SPARE
;
1131 if (sb
->dev_roles
[d
] != __cpu_to_le16(want
)) {
1132 sb
->dev_roles
[d
] = __cpu_to_le16(want
);
1135 if (info
->reshape_active
&&
1136 sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1137 info
->delta_disks
>= 0 &&
1138 info
->reshape_progress
< __le64_to_cpu(sb
->reshape_position
)) {
1139 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1142 if (info
->reshape_active
&&
1143 sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1144 info
->delta_disks
< 0 &&
1145 info
->reshape_progress
> __le64_to_cpu(sb
->reshape_position
)) {
1146 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1149 } else if (strcmp(update
, "linear-grow-new") == 0) {
1152 unsigned int max
= __le32_to_cpu(sb
->max_dev
);
1154 for (i
=0 ; i
< max
; i
++)
1155 if (__le16_to_cpu(sb
->dev_roles
[i
]) >= MD_DISK_ROLE_FAULTY
)
1157 sb
->dev_number
= __cpu_to_le32(i
);
1158 info
->disk
.number
= i
;
1159 if (max
>= __le32_to_cpu(sb
->max_dev
))
1160 sb
->max_dev
= __cpu_to_le32(max
+1);
1162 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1163 read(rfd
, sb
->device_uuid
, 16) != 16) {
1164 __u32 r
[4] = {random(), random(), random(), random()};
1165 memcpy(sb
->device_uuid
, r
, 16);
1171 __cpu_to_le16(info
->disk
.raid_disk
);
1173 fd
= open(devname
, O_RDONLY
);
1175 unsigned long long ds
;
1176 get_dev_size(fd
, devname
, &ds
);
1179 if (__le64_to_cpu(sb
->super_offset
) <
1180 __le64_to_cpu(sb
->data_offset
)) {
1181 sb
->data_size
= __cpu_to_le64(
1182 ds
- __le64_to_cpu(sb
->data_offset
));
1185 ds
&= ~(unsigned long long)(4*2-1);
1186 sb
->super_offset
= __cpu_to_le64(ds
);
1187 sb
->data_size
= __cpu_to_le64(
1188 ds
- __le64_to_cpu(sb
->data_offset
));
1191 } else if (strcmp(update
, "linear-grow-update") == 0) {
1192 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
1193 sb
->dev_roles
[info
->disk
.number
] =
1194 __cpu_to_le16(info
->disk
.raid_disk
);
1195 } else if (strcmp(update
, "resync") == 0) {
1196 /* make sure resync happens */
1197 sb
->resync_offset
= 0ULL;
1198 } else if (strcmp(update
, "uuid") == 0) {
1199 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
1201 if (__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
1202 struct bitmap_super_s
*bm
;
1203 bm
= (struct bitmap_super_s
*)(st
->sb
+MAX_SB_SIZE
);
1204 memcpy(bm
->uuid
, sb
->set_uuid
, 16);
1206 } else if (strcmp(update
, "no-bitmap") == 0) {
1207 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
);
1208 } else if (strcmp(update
, "bbl") == 0) {
1209 /* only possible if there is room after the bitmap, or if
1210 * there is no bitmap
1212 unsigned long long sb_offset
= __le64_to_cpu(sb
->super_offset
);
1213 unsigned long long data_offset
= __le64_to_cpu(sb
->data_offset
);
1214 long bitmap_offset
= (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
);
1215 long bm_sectors
= 0;
1219 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1220 struct bitmap_super_s
*bsb
;
1221 bsb
= (struct bitmap_super_s
*)(((char*)sb
)+MAX_SB_SIZE
);
1222 bm_sectors
= bitmap_sectors(bsb
);
1225 if (sb_offset
< data_offset
) {
1226 /* 1.1 or 1.2. Put bbl after bitmap leaving at least 32K
1229 bb_offset
= sb_offset
+ 8;
1230 if (bm_sectors
&& bitmap_offset
> 0)
1231 bb_offset
= bitmap_offset
+ bm_sectors
;
1232 while (bb_offset
< (long)sb_offset
+ 8 + 32*2
1233 && bb_offset
+ 8+8 <= (long)data_offset
)
1234 /* too close to bitmap, and room to grow */
1236 if (bb_offset
+ 8 <= (long)data_offset
) {
1237 sb
->bblog_size
= __cpu_to_le16(8);
1238 sb
->bblog_offset
= __cpu_to_le32(bb_offset
);
1241 /* 1.0 - Put bbl just before super block */
1242 if (bm_sectors
&& bitmap_offset
< 0)
1243 space
= -bitmap_offset
- bm_sectors
;
1245 space
= sb_offset
- data_offset
-
1246 __le64_to_cpu(sb
->data_size
);
1248 sb
->bblog_size
= __cpu_to_le16(8);
1249 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1252 } else if (strcmp(update
, "no-bbl") == 0) {
1253 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
1254 pr_err("Cannot remove active bbl from %s\n",devname
);
1257 sb
->bblog_shift
= 0;
1258 sb
->bblog_offset
= 0;
1260 } else if (strcmp(update
, "name") == 0) {
1261 if (info
->name
[0] == 0)
1262 sprintf(info
->name
, "%d", info
->array
.md_minor
);
1263 memset(sb
->set_name
, 0, sizeof(sb
->set_name
));
1265 strchr(info
->name
, ':') == NULL
&&
1266 strlen(homehost
)+1+strlen(info
->name
) < 32) {
1267 strcpy(sb
->set_name
, homehost
);
1268 strcat(sb
->set_name
, ":");
1269 strcat(sb
->set_name
, info
->name
);
1271 strcpy(sb
->set_name
, info
->name
);
1272 } else if (strcmp(update
, "devicesize") == 0 &&
1273 __le64_to_cpu(sb
->super_offset
) <
1274 __le64_to_cpu(sb
->data_offset
)) {
1275 /* set data_size to device size less data_offset */
1276 struct misc_dev_info
*misc
= (struct misc_dev_info
*)
1277 (st
->sb
+ MAX_SB_SIZE
+ BM_SUPER_SIZE
);
1278 sb
->data_size
= __cpu_to_le64(
1279 misc
->device_size
- __le64_to_cpu(sb
->data_offset
));
1280 } else if (strcmp(update
, "revert-reshape") == 0) {
1282 if (!(sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)))
1283 pr_err("No active reshape to revert on %s\n",
1287 unsigned long long reshape_sectors
;
1290 /* reshape_position is a little messy.
1291 * Its value must be a multiple of the larger
1292 * chunk size, and of the "after" data disks.
1293 * So when reverting we need to change it to
1294 * be a multiple of the new "after" data disks,
1295 * which is the old "before".
1296 * If it isn't already a multiple of 'before',
1297 * the only thing we could do would be
1298 * copy some block around on the disks, which
1299 * is easy to get wrong.
1300 * So we reject a revert-reshape unless the
1301 * alignment is good.
1303 if (__le32_to_cpu(sb
->level
) >= 4 &&
1304 __le32_to_cpu(sb
->level
) <= 6) {
1305 reshape_sectors
= __le64_to_cpu(sb
->reshape_position
);
1306 reshape_chunk
= __le32_to_cpu(sb
->new_chunk
);
1307 reshape_chunk
*= __le32_to_cpu(sb
->raid_disks
) - __le32_to_cpu(sb
->delta_disks
) -
1308 (__le32_to_cpu(sb
->level
)==6 ? 2 : 1);
1309 if (reshape_sectors
% reshape_chunk
) {
1310 pr_err("Reshape position is not suitably aligned.\n");
1311 pr_err("Try normal assembly and stop again\n");
1315 sb
->raid_disks
= __cpu_to_le32(__le32_to_cpu(sb
->raid_disks
) -
1316 __le32_to_cpu(sb
->delta_disks
));
1317 if (sb
->delta_disks
== 0)
1318 sb
->feature_map
^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS
);
1320 sb
->delta_disks
= __cpu_to_le32(-__le32_to_cpu(sb
->delta_disks
));
1322 temp
= sb
->new_layout
;
1323 sb
->new_layout
= sb
->layout
;
1326 temp
= sb
->new_chunk
;
1327 sb
->new_chunk
= sb
->chunksize
;
1328 sb
->chunksize
= temp
;
1330 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_NEW_OFFSET
)) {
1331 long offset_delta
= (int32_t)__le32_to_cpu(sb
->new_offset
);
1332 sb
->data_offset
= __cpu_to_le64(__le64_to_cpu(sb
->data_offset
) + offset_delta
);
1333 sb
->new_offset
= __cpu_to_le32(-offset_delta
);
1334 sb
->data_size
= __cpu_to_le64(__le64_to_cpu(sb
->data_size
) - offset_delta
);
1337 } else if (strcmp(update
, "_reshape_progress")==0)
1338 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1339 else if (strcmp(update
, "writemostly")==0)
1340 sb
->devflags
|= WriteMostly1
;
1341 else if (strcmp(update
, "readwrite")==0)
1342 sb
->devflags
&= ~WriteMostly1
;
1346 sb
->sb_csum
= calc_sb_1_csum(sb
);
1350 static int init_super1(struct supertype
*st
, mdu_array_info_t
*info
,
1351 unsigned long long size
, char *name
, char *homehost
,
1352 int *uuid
, unsigned long long data_offset
)
1354 struct mdp_superblock_1
*sb
;
1360 if (posix_memalign((void**)&sb
, 4096, SUPER1_SIZE
) != 0) {
1361 pr_err("could not allocate superblock\n");
1364 memset(sb
, 0, SUPER1_SIZE
);
1368 /* zeroing superblock */
1372 spares
= info
->working_disks
- info
->active_disks
;
1373 if (info
->raid_disks
+ spares
> MAX_DEVS
) {
1374 pr_err("too many devices requested: %d+%d > %d\n",
1375 info
->raid_disks
, spares
, MAX_DEVS
);
1379 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
1380 sb
->major_version
= __cpu_to_le32(1);
1381 sb
->feature_map
= 0;
1385 copy_uuid(sb
->set_uuid
, uuid
, super1
.swapuuid
);
1387 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1388 read(rfd
, sb
->set_uuid
, 16) != 16) {
1389 __u32 r
[4] = {random(), random(), random(), random()};
1390 memcpy(sb
->set_uuid
, r
, 16);
1392 if (rfd
>= 0) close(rfd
);
1395 if (name
== NULL
|| *name
== 0) {
1396 sprintf(defname
, "%d", info
->md_minor
);
1400 strchr(name
, ':')== NULL
&&
1401 strlen(homehost
)+1+strlen(name
) < 32) {
1402 strcpy(sb
->set_name
, homehost
);
1403 strcat(sb
->set_name
, ":");
1404 strcat(sb
->set_name
, name
);
1406 strcpy(sb
->set_name
, name
);
1408 sb
->ctime
= __cpu_to_le64((unsigned long long)time(0));
1409 sb
->level
= __cpu_to_le32(info
->level
);
1410 sb
->layout
= __cpu_to_le32(info
->layout
);
1411 sb
->size
= __cpu_to_le64(size
*2ULL);
1412 sb
->chunksize
= __cpu_to_le32(info
->chunk_size
>>9);
1413 sb
->raid_disks
= __cpu_to_le32(info
->raid_disks
);
1415 sb
->data_offset
= __cpu_to_le64(data_offset
);
1416 sb
->data_size
= __cpu_to_le64(0);
1417 sb
->super_offset
= __cpu_to_le64(0);
1418 sb
->recovery_offset
= __cpu_to_le64(0);
1420 sb
->utime
= sb
->ctime
;
1421 sb
->events
= __cpu_to_le64(1);
1422 if (info
->state
& (1<<MD_SB_CLEAN
))
1423 sb
->resync_offset
= MaxSector
;
1425 sb
->resync_offset
= 0;
1426 sbsize
= sizeof(struct mdp_superblock_1
) + 2 * (info
->raid_disks
+ spares
);
1427 sbsize
= ROUND_UP(sbsize
, 512);
1428 sb
->max_dev
= __cpu_to_le32((sbsize
- sizeof(struct mdp_superblock_1
)) / 2);
1430 memset(sb
->dev_roles
, 0xff, MAX_SB_SIZE
- sizeof(struct mdp_superblock_1
));
1438 long long data_offset
;
1439 mdu_disk_info_t disk
;
1440 struct devinfo
*next
;
1443 /* Add a device to the superblock being created */
1444 static int add_to_super1(struct supertype
*st
, mdu_disk_info_t
*dk
,
1445 int fd
, char *devname
, unsigned long long data_offset
)
1447 struct mdp_superblock_1
*sb
= st
->sb
;
1448 __u16
*rp
= sb
->dev_roles
+ dk
->number
;
1449 struct devinfo
*di
, **dip
;
1451 if ((dk
->state
& 6) == 6) /* active, sync */
1452 *rp
= __cpu_to_le16(dk
->raid_disk
);
1453 else if (dk
->state
& (1<<MD_DISK_JOURNAL
))
1454 *rp
= MD_DISK_ROLE_JOURNAL
;
1455 else if ((dk
->state
& ~2) == 0) /* active or idle -> spare */
1456 *rp
= MD_DISK_ROLE_SPARE
;
1458 *rp
= MD_DISK_ROLE_FAULTY
;
1460 if (dk
->number
>= (int)__le32_to_cpu(sb
->max_dev
) &&
1461 __le32_to_cpu(sb
->max_dev
) < MAX_DEVS
)
1462 sb
->max_dev
= __cpu_to_le32(dk
->number
+1);
1464 sb
->dev_number
= __cpu_to_le32(dk
->number
);
1465 sb
->devflags
= 0; /* don't copy another disks flags */
1466 sb
->sb_csum
= calc_sb_1_csum(sb
);
1468 dip
= (struct devinfo
**)&st
->info
;
1470 dip
= &(*dip
)->next
;
1471 di
= xmalloc(sizeof(struct devinfo
));
1473 di
->devname
= devname
;
1475 di
->data_offset
= data_offset
;
1483 static void locate_bitmap1(struct supertype
*st
, int fd
);
1485 static int store_super1(struct supertype
*st
, int fd
)
1487 struct mdp_superblock_1
*sb
= st
->sb
;
1488 unsigned long long sb_offset
;
1489 struct align_fd afd
;
1491 unsigned long long dsize
;
1493 if (!get_dev_size(fd
, NULL
, &dsize
))
1504 * Calculate the position of the superblock.
1505 * It is always aligned to a 4K boundary and
1506 * depending on minor_version, it can be:
1507 * 0: At least 8K, but less than 12K, from end of device
1508 * 1: At start of device
1509 * 2: 4K from start of device.
1511 switch(st
->minor_version
) {
1515 sb_offset
&= ~(4*2-1);
1527 if (sb_offset
!= __le64_to_cpu(sb
->super_offset
) &&
1528 0 != __le64_to_cpu(sb
->super_offset
)
1530 pr_err("internal error - sb_offset is wrong\n");
1534 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL)
1537 sbsize
= ROUND_UP(sizeof(*sb
) + 2 * __le32_to_cpu(sb
->max_dev
), 512);
1539 if (awrite(&afd
, sb
, sbsize
) != sbsize
)
1542 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1543 struct bitmap_super_s
*bm
= (struct bitmap_super_s
*)
1544 (((char*)sb
)+MAX_SB_SIZE
);
1545 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
) {
1546 locate_bitmap1(st
, fd
);
1547 if (awrite(&afd
, bm
, sizeof(*bm
)) != sizeof(*bm
))
1555 static int load_super1(struct supertype
*st
, int fd
, char *devname
);
1557 static unsigned long choose_bm_space(unsigned long devsize
)
1559 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
1560 * if bigger than 200Gig, save 128k
1561 * NOTE: result must be multiple of 4K else bad things happen
1562 * on 4K-sector devices.
1564 if (devsize
< 64*2) return 0;
1565 if (devsize
- 64*2 >= 200*1024*1024*2)
1567 if (devsize
- 4*2 > 8*1024*1024*2)
1572 static void free_super1(struct supertype
*st
);
1574 #define META_BLOCK_SIZE 4096
1575 unsigned long crc32(
1577 const unsigned char *buf
,
1580 static int write_empty_r5l_meta_block(struct supertype
*st
, int fd
)
1582 struct r5l_meta_block
*mb
;
1583 struct mdp_superblock_1
*sb
= st
->sb
;
1584 struct align_fd afd
;
1589 if (posix_memalign((void**)&mb
, 4096, META_BLOCK_SIZE
) != 0) {
1590 pr_err("Could not allocate memory for the meta block.\n");
1594 memset(mb
, 0, META_BLOCK_SIZE
);
1596 mb
->magic
= __cpu_to_le32(R5LOG_MAGIC
);
1597 mb
->version
= R5LOG_VERSION
;
1598 mb
->meta_size
= __cpu_to_le32(sizeof(struct r5l_meta_block
));
1599 mb
->seq
= __cpu_to_le64(random32());
1600 mb
->position
= __cpu_to_le64(0);
1602 crc
= crc32(0xffffffff, sb
->set_uuid
, sizeof(sb
->set_uuid
));
1603 crc
= crc32(crc
, (void *)mb
, META_BLOCK_SIZE
);
1604 mb
->checksum
= __cpu_to_le32(crc
);
1606 if (lseek64(fd
, (sb
->data_offset
) * 512, 0) < 0LL) {
1607 pr_err("cannot seek to offset of the meta block\n");
1611 if (awrite(&afd
, mb
, META_BLOCK_SIZE
) != META_BLOCK_SIZE
) {
1612 pr_err("failed to store write the meta block \n");
1626 static int write_init_super1(struct supertype
*st
)
1628 struct mdp_superblock_1
*sb
= st
->sb
;
1629 struct supertype
*refst
;
1632 unsigned long long bm_space
;
1634 unsigned long long dsize
, array_size
;
1635 unsigned long long sb_offset
;
1636 unsigned long long data_offset
;
1638 for (di
= st
->info
; di
; di
= di
->next
) {
1639 if (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))
1640 sb
->feature_map
|= MD_FEATURE_JOURNAL
;
1643 for (di
= st
->info
; di
; di
= di
->next
) {
1644 if (di
->disk
.state
& (1 << MD_DISK_FAULTY
))
1649 while (Kill(di
->devname
, NULL
, 0, -1, 1) == 0)
1652 sb
->dev_number
= __cpu_to_le32(di
->disk
.number
);
1653 if (di
->disk
.state
& (1<<MD_DISK_WRITEMOSTLY
))
1654 sb
->devflags
|= WriteMostly1
;
1656 sb
->devflags
&= ~WriteMostly1
;
1658 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1659 read(rfd
, sb
->device_uuid
, 16) != 16) {
1660 __u32 r
[4] = {random(), random(), random(), random()};
1661 memcpy(sb
->device_uuid
, r
, 16);
1668 refst
= dup_super(st
);
1669 if (load_super1(refst
, di
->fd
, NULL
)==0) {
1670 struct mdp_superblock_1
*refsb
= refst
->sb
;
1672 memcpy(sb
->device_uuid
, refsb
->device_uuid
, 16);
1673 if (memcmp(sb
->set_uuid
, refsb
->set_uuid
, 16)==0) {
1674 /* same array, so preserve events and
1676 sb
->events
= refsb
->events
;
1677 /* bugs in 2.6.17 and earlier mean the
1678 * dev_number chosen in Manage must be preserved
1680 if (get_linux_version() >= 2006018)
1681 sb
->dev_number
= refsb
->dev_number
;
1687 if (!get_dev_size(di
->fd
, NULL
, &dsize
)) {
1700 * Calculate the position of the superblock.
1701 * It is always aligned to a 4K boundary and
1702 * depending on minor_version, it can be:
1703 * 0: At least 8K, but less than 12K, from end of device
1704 * 1: At start of device
1705 * 2: 4K from start of device.
1706 * data_offset has already been set.
1708 array_size
= __le64_to_cpu(sb
->size
);
1709 /* work out how much space we left for a bitmap,
1710 * Add 8 sectors for bad block log */
1711 bm_space
= choose_bm_space(array_size
) + 8;
1713 data_offset
= di
->data_offset
;
1714 if (data_offset
== INVALID_SECTORS
)
1715 data_offset
= st
->data_offset
;
1716 switch(st
->minor_version
) {
1718 if (data_offset
== INVALID_SECTORS
)
1722 sb_offset
&= ~(4*2-1);
1723 sb
->data_offset
= __cpu_to_le64(data_offset
);
1724 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1725 if (sb_offset
< array_size
+ bm_space
)
1726 bm_space
= sb_offset
- array_size
;
1727 sb
->data_size
= __cpu_to_le64(sb_offset
- bm_space
);
1728 if (bm_space
>= 8) {
1729 sb
->bblog_size
= __cpu_to_le16(8);
1730 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1734 sb
->super_offset
= __cpu_to_le64(0);
1735 if (data_offset
== INVALID_SECTORS
)
1738 sb
->data_offset
= __cpu_to_le64(data_offset
);
1739 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
1740 if (data_offset
>= 8 + 32*2 + 8) {
1741 sb
->bblog_size
= __cpu_to_le16(8);
1742 sb
->bblog_offset
= __cpu_to_le32(8 + 32*2);
1743 } else if (data_offset
>= 16) {
1744 sb
->bblog_size
= __cpu_to_le16(8);
1745 sb
->bblog_offset
= __cpu_to_le32(data_offset
-8);
1750 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1751 if (data_offset
== INVALID_SECTORS
)
1754 sb
->data_offset
= __cpu_to_le64(data_offset
);
1755 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
1756 if (data_offset
>= 16 + 32*2 + 8) {
1757 sb
->bblog_size
= __cpu_to_le16(8);
1758 sb
->bblog_offset
= __cpu_to_le32(8 + 32*2);
1759 } else if (data_offset
>= 16+16) {
1760 sb
->bblog_size
= __cpu_to_le16(8);
1761 /* '8' sectors for the bblog, and another '8'
1762 * because we want offset from superblock, not
1765 sb
->bblog_offset
= __cpu_to_le32(data_offset
-8-8);
1769 pr_err("Failed to write invalid metadata format 1.%i to %s\n",
1770 st
->minor_version
, di
->devname
);
1774 /* Disable badblock log on clusters, or when explicitly requested */
1775 if (st
->nodes
> 0 || conf_get_create_info()->bblist
== 0) {
1777 sb
->bblog_offset
= 0;
1780 sb
->sb_csum
= calc_sb_1_csum(sb
);
1781 rv
= store_super1(st
, di
->fd
);
1783 if (rv
== 0 && (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))) {
1784 rv
= write_empty_r5l_meta_block(st
, di
->fd
);
1789 if (rv
== 0 && (__le32_to_cpu(sb
->feature_map
) & 1))
1790 rv
= st
->ss
->write_bitmap(st
, di
->fd
, NoUpdate
);
1798 pr_err("Failed to write metadata to %s\n",
1805 static int compare_super1(struct supertype
*st
, struct supertype
*tst
)
1809 * 0 same, or first was empty, and second was copied
1810 * 1 second had wrong number
1812 * 3 wrong other info
1814 struct mdp_superblock_1
*first
= st
->sb
;
1815 struct mdp_superblock_1
*second
= tst
->sb
;
1817 if (second
->magic
!= __cpu_to_le32(MD_SB_MAGIC
))
1819 if (second
->major_version
!= __cpu_to_le32(1))
1823 if (posix_memalign((void**)&first
, 4096, SUPER1_SIZE
) != 0) {
1824 pr_err("could not allocate superblock\n");
1827 memcpy(first
, second
, SUPER1_SIZE
);
1831 if (memcmp(first
->set_uuid
, second
->set_uuid
, 16)!= 0)
1834 if (first
->ctime
!= second
->ctime
||
1835 first
->level
!= second
->level
||
1836 first
->layout
!= second
->layout
||
1837 first
->size
!= second
->size
||
1838 first
->chunksize
!= second
->chunksize
||
1839 first
->raid_disks
!= second
->raid_disks
)
1844 static int load_super1(struct supertype
*st
, int fd
, char *devname
)
1846 unsigned long long dsize
;
1847 unsigned long long sb_offset
;
1848 struct mdp_superblock_1
*super
;
1850 struct bitmap_super_s
*bsb
;
1851 struct misc_dev_info
*misc
;
1852 struct align_fd afd
;
1858 if (st
->ss
== NULL
|| st
->minor_version
== -1) {
1860 struct supertype tst
;
1861 __u64 bestctime
= 0;
1862 /* guess... choose latest ctime */
1863 memset(&tst
, 0, sizeof(tst
));
1865 for (tst
.minor_version
= 0; tst
.minor_version
<= 2 ; tst
.minor_version
++) {
1866 switch(load_super1(&tst
, fd
, devname
)) {
1867 case 0: super
= tst
.sb
;
1868 if (bestvers
== -1 ||
1869 bestctime
< __le64_to_cpu(super
->ctime
)) {
1870 bestvers
= tst
.minor_version
;
1871 bestctime
= __le64_to_cpu(super
->ctime
);
1876 case 1: return 1; /*bad device */
1877 case 2: break; /* bad, try next */
1880 if (bestvers
!= -1) {
1882 tst
.minor_version
= bestvers
;
1884 tst
.max_devs
= MAX_DEVS
;
1885 rv
= load_super1(&tst
, fd
, devname
);
1892 if (!get_dev_size(fd
, devname
, &dsize
))
1898 pr_err("%s is too small for md: size is %llu sectors.\n",
1904 * Calculate the position of the superblock.
1905 * It is always aligned to a 4K boundary and
1906 * depending on minor_version, it can be:
1907 * 0: At least 8K, but less than 12K, from end of device
1908 * 1: At start of device
1909 * 2: 4K from start of device.
1911 switch(st
->minor_version
) {
1915 sb_offset
&= ~(4*2-1);
1927 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL) {
1929 pr_err("Cannot seek to superblock on %s: %s\n",
1930 devname
, strerror(errno
));
1934 if (posix_memalign((void**)&super
, 4096, SUPER1_SIZE
) != 0) {
1935 pr_err("could not allocate superblock\n");
1939 if (aread(&afd
, super
, MAX_SB_SIZE
) != MAX_SB_SIZE
) {
1941 pr_err("Cannot read superblock on %s\n",
1947 if (__le32_to_cpu(super
->magic
) != MD_SB_MAGIC
) {
1949 pr_err("No super block found on %s (Expected magic %08x, got %08x)\n",
1950 devname
, MD_SB_MAGIC
, __le32_to_cpu(super
->magic
));
1955 if (__le32_to_cpu(super
->major_version
) != 1) {
1957 pr_err("Cannot interpret superblock on %s - version is %d\n",
1958 devname
, __le32_to_cpu(super
->major_version
));
1962 if (__le64_to_cpu(super
->super_offset
) != sb_offset
) {
1964 pr_err("No superblock found on %s (super_offset is wrong)\n",
1971 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
1973 misc
= (struct misc_dev_info
*) (((char*)super
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
1974 misc
->device_size
= dsize
;
1975 if (st
->data_offset
== INVALID_SECTORS
)
1976 st
->data_offset
= __le64_to_cpu(super
->data_offset
);
1978 /* Now check on the bitmap superblock */
1979 if ((__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) == 0)
1981 /* Read the bitmap superblock and make sure it looks
1982 * valid. If it doesn't clear the bit. An --assemble --force
1983 * should get that written out.
1985 locate_bitmap1(st
, fd
);
1986 if (aread(&afd
, bsb
, 512) != 512)
1989 uuid_from_super1(st
, uuid
);
1990 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
1991 memcmp(bsb
->uuid
, uuid
, 16) != 0)
1996 super
->feature_map
= __cpu_to_le32(__le32_to_cpu(super
->feature_map
)
1997 & ~MD_FEATURE_BITMAP_OFFSET
);
2001 static struct supertype
*match_metadata_desc1(char *arg
)
2003 struct supertype
*st
= xcalloc(1, sizeof(*st
));
2005 st
->container_devnm
[0] = 0;
2007 st
->max_devs
= MAX_DEVS
;
2009 st
->data_offset
= INVALID_SECTORS
;
2010 /* leading zeros can be safely ignored. --detail generates them. */
2013 if (strcmp(arg
, "1.0") == 0 ||
2014 strcmp(arg
, "1.00") == 0) {
2015 st
->minor_version
= 0;
2018 if (strcmp(arg
, "1.1") == 0 ||
2019 strcmp(arg
, "1.01") == 0
2021 st
->minor_version
= 1;
2024 if (strcmp(arg
, "1.2") == 0 ||
2025 #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
2026 strcmp(arg
, "default") == 0 ||
2027 #endif /* DEFAULT_OLD_METADATA */
2028 strcmp(arg
, "1.02") == 0) {
2029 st
->minor_version
= 2;
2032 if (strcmp(arg
, "1") == 0 ||
2033 strcmp(arg
, "default") == 0) {
2034 st
->minor_version
= -1;
2042 /* find available size on device with this devsize, using
2043 * superblock type st, and reserving 'reserve' sectors for
2046 static __u64
avail_size1(struct supertype
*st
, __u64 devsize
,
2047 unsigned long long data_offset
)
2049 struct mdp_superblock_1
*super
= st
->sb
;
2056 if (__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
2057 /* hot-add. allow for actual size of bitmap */
2058 struct bitmap_super_s
*bsb
;
2059 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
2060 bmspace
= bitmap_sectors(bsb
);
2063 /* Allow space for bad block log */
2064 if (super
->bblog_size
)
2065 bbspace
= __le16_to_cpu(super
->bblog_size
);
2067 if (st
->minor_version
< 0)
2068 /* not specified, so time to set default */
2069 st
->minor_version
= 2;
2071 if (data_offset
== INVALID_SECTORS
)
2072 data_offset
= st
->data_offset
;
2074 if (data_offset
!= INVALID_SECTORS
)
2075 switch(st
->minor_version
) {
2077 return devsize
- data_offset
- 8*2 - bbspace
;
2080 return devsize
- data_offset
;
2087 switch(st
->minor_version
) {
2090 return ((devsize
- 8*2 - bbspace
) & ~(4*2-1));
2092 /* at start, 4K for superblock and possible bitmap */
2093 return devsize
- 4*2 - bbspace
;
2095 /* 4k from start, 4K for superblock and possible bitmap */
2096 return devsize
- (4+4)*2 - bbspace
;
2102 add_internal_bitmap1(struct supertype
*st
,
2103 int *chunkp
, int delay
, int write_behind
,
2104 unsigned long long size
,
2105 int may_change
, int major
)
2108 * If not may_change, then this is a 'Grow' without sysfs support for
2109 * bitmaps, and the bitmap must fit after the superblock at 1K offset.
2110 * If may_change, then this is create or a Grow with sysfs syupport,
2111 * and we can put the bitmap wherever we like.
2113 * size is in sectors, chunk is in bytes !!!
2116 unsigned long long bits
;
2117 unsigned long long max_bits
;
2118 unsigned long long min_chunk
;
2120 long bbl_offset
, bbl_size
;
2121 unsigned long long chunk
= *chunkp
;
2124 struct mdp_superblock_1
*sb
= st
->sb
;
2125 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
2128 if (__le64_to_cpu(sb
->data_size
) == 0)
2129 /* Must be creating the array, else data_size would be non-zero */
2131 switch(st
->minor_version
) {
2133 /* either 3K after the superblock (when hot-add),
2134 * or some amount of space before.
2137 /* We are creating array, so we *know* how much room has
2142 room
= choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2144 room
= __le64_to_cpu(sb
->super_offset
)
2145 - __le64_to_cpu(sb
->data_offset
)
2146 - __le64_to_cpu(sb
->data_size
);
2147 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2150 bbl_offset
= (__s32
)__le32_to_cpu(sb
->bblog_offset
);
2151 if (bbl_size
< -bbl_offset
)
2152 bbl_size
= -bbl_offset
;
2154 if (!may_change
|| (room
< 3*2 &&
2155 __le32_to_cpu(sb
->max_dev
) <= 384)) {
2160 offset
= 0; /* means movable offset */
2165 case 2: /* between superblock and data */
2169 room
= choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2171 room
= __le64_to_cpu(sb
->data_offset
)
2172 - __le64_to_cpu(sb
->super_offset
);
2173 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2175 room
= __le32_to_cpu(sb
->bblog_offset
) + bbl_size
;
2180 room
-= 2; /* Leave 1K for superblock */
2184 room
-= 4*2; /* leave 4K for superblock */
2194 if (chunk
== UnSet
&& room
> 128*2)
2195 /* Limit to 128K of bitmap when chunk size not requested */
2199 /* No room for a bitmap */
2202 max_bits
= (room
* 512 - sizeof(bitmap_super_t
)) * 8;
2204 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
2205 bits
= (size
*512)/min_chunk
+1;
2206 while (bits
> max_bits
) {
2210 if (chunk
== UnSet
) {
2211 /* For practical purpose, 64Meg is a good
2212 * default chunk size for internal bitmaps.
2215 if (chunk
< 64*1024*1024)
2216 chunk
= 64*1024*1024;
2217 } else if (chunk
< min_chunk
)
2218 return 0; /* chunk size too small */
2219 if (chunk
== 0) /* rounding problem */
2223 /* start bitmap on a 4K boundary with enough space for
2226 bits
= (size
*512) / chunk
+ 1;
2227 room
= ((bits
+7)/8 + sizeof(bitmap_super_t
) +4095)/4096;
2228 room
*= 8; /* convert 4K blocks to sectors */
2229 offset
= -room
- bbl_size
;
2232 sb
->bitmap_offset
= (int32_t)__cpu_to_le32(offset
);
2234 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
)
2235 | MD_FEATURE_BITMAP_OFFSET
);
2236 memset(bms
, 0, sizeof(*bms
));
2237 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
2238 bms
->version
= __cpu_to_le32(major
);
2239 uuid_from_super1(st
, uuid
);
2240 memcpy(bms
->uuid
, uuid
, 16);
2241 bms
->chunksize
= __cpu_to_le32(chunk
);
2242 bms
->daemon_sleep
= __cpu_to_le32(delay
);
2243 bms
->sync_size
= __cpu_to_le64(size
);
2244 bms
->write_behind
= __cpu_to_le32(write_behind
);
2245 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2247 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
)
2248 | MD_FEATURE_BITMAP_VERSIONED
);
2249 if (st
->cluster_name
)
2250 strncpy((char *)bms
->cluster_name
,
2251 st
->cluster_name
, strlen(st
->cluster_name
));
2257 static void locate_bitmap1(struct supertype
*st
, int fd
)
2259 unsigned long long offset
;
2260 struct mdp_superblock_1
*sb
;
2264 if (st
->ss
->load_super(st
, fd
, NULL
))
2265 return; /* no error I hope... */
2270 offset
= __le64_to_cpu(sb
->super_offset
);
2271 offset
+= (int32_t) __le32_to_cpu(sb
->bitmap_offset
);
2274 lseek64(fd
, offset
<<9, 0);
2277 static int write_bitmap1(struct supertype
*st
, int fd
, enum bitmap_update update
)
2279 struct mdp_superblock_1
*sb
= st
->sb
;
2280 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+MAX_SB_SIZE
);
2284 struct align_fd afd
;
2286 unsigned long long total_bm_space
, bm_space_per_node
;
2290 /* update cluster name */
2291 if (st
->cluster_name
) {
2292 memset((char *)bms
->cluster_name
, 0, sizeof(bms
->cluster_name
));
2293 strncpy((char *)bms
->cluster_name
, st
->cluster_name
, 64);
2297 /* cluster md only supports superblock 1.2 now */
2298 if (st
->minor_version
!= 2) {
2299 pr_err("Warning: cluster md only works with superblock 1.2\n");
2303 /* Each node has an independent bitmap, it is necessary to calculate the
2304 * space is enough or not, first get how many bytes for the total bitmap */
2305 bm_space_per_node
= calc_bitmap_size(bms
, 4096);
2307 total_bm_space
= 512 * (__le64_to_cpu(sb
->data_offset
) - __le64_to_cpu(sb
->super_offset
));
2308 total_bm_space
= total_bm_space
- 4096; /* leave another 4k for superblock */
2310 if (bm_space_per_node
* st
->nodes
> total_bm_space
) {
2311 pr_err("Warning: The max num of nodes can't exceed %llu\n",
2312 total_bm_space
/ bm_space_per_node
);
2316 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2325 locate_bitmap1(st
, fd
);
2327 if (posix_memalign(&buf
, 4096, 4096))
2331 /* Only the bitmap[0] should resync
2332 * whole device on initial assembly
2335 memset(buf
, 0x00, 4096);
2337 memset(buf
, 0xff, 4096);
2338 memcpy(buf
, (char *)bms
, sizeof(bitmap_super_t
));
2340 towrite
= calc_bitmap_size(bms
, 4096);
2341 while (towrite
> 0) {
2345 n
= awrite(&afd
, buf
, n
);
2351 memset(buf
, 0x00, 4096);
2353 memset(buf
, 0xff, 4096);
2360 } while (++i
< __le32_to_cpu(bms
->nodes
));
2366 static void free_super1(struct supertype
*st
)
2371 struct devinfo
*di
= st
->info
;
2372 st
->info
= di
->next
;
2381 static int validate_geometry1(struct supertype
*st
, int level
,
2382 int layout
, int raiddisks
,
2383 int *chunk
, unsigned long long size
,
2384 unsigned long long data_offset
,
2385 char *subdev
, unsigned long long *freesize
,
2388 unsigned long long ldsize
, devsize
;
2390 unsigned long long headroom
;
2393 if (level
== LEVEL_CONTAINER
) {
2395 pr_err("1.x metadata does not support containers\n");
2398 if (*chunk
== UnSet
)
2399 *chunk
= DEFAULT_CHUNK
;
2404 if (st
->minor_version
< 0)
2405 /* not specified, so time to set default */
2406 st
->minor_version
= 2;
2408 fd
= open(subdev
, O_RDONLY
|O_EXCL
, 0);
2411 pr_err("super1.x cannot open %s: %s\n",
2412 subdev
, strerror(errno
));
2416 if (!get_dev_size(fd
, subdev
, &ldsize
)) {
2422 devsize
= ldsize
>> 9;
2428 /* creating: allow suitable space for bitmap */
2429 bmspace
= choose_bm_space(devsize
);
2431 if (data_offset
== INVALID_SECTORS
)
2432 data_offset
= st
->data_offset
;
2433 if (data_offset
== INVALID_SECTORS
)
2434 switch (st
->minor_version
) {
2440 /* Choose data offset appropriate for this device
2441 * and use as default for whole array.
2442 * The data_offset must allow for bitmap space
2443 * and base metadata, should allow for some headroom
2444 * for reshape, and should be rounded to multiple
2446 * Headroom is limited to 128M, but aim for about 0.1%
2448 headroom
= 128*1024*2;
2449 while ((headroom
<< 10) > devsize
&&
2451 headroom
/ 2 >= ((unsigned)(*chunk
)*2)*2))
2453 data_offset
= 12*2 + bmspace
+ headroom
;
2454 #define ONE_MEG (2*1024)
2455 if (data_offset
> ONE_MEG
)
2456 data_offset
= (data_offset
/ ONE_MEG
) * ONE_MEG
;
2459 if (st
->data_offset
== INVALID_SECTORS
)
2460 st
->data_offset
= data_offset
;
2461 switch(st
->minor_version
) {
2462 case 0: /* metadata at end. Round down and subtract space to reserve */
2463 devsize
= (devsize
& ~(4ULL*2-1));
2464 /* space for metadata, bblog, bitmap */
2465 devsize
-= 8*2 + 8 + bmspace
;
2469 devsize
-= data_offset
;
2472 *freesize
= devsize
;
2475 #endif /* MDASSEMBLE */
2477 void *super1_make_v0(struct supertype
*st
, struct mdinfo
*info
, mdp_super_t
*sb0
)
2479 /* Create a v1.0 superblock based on 'info'*/
2481 struct mdp_superblock_1
*sb
;
2484 unsigned long long offset
;
2486 if (posix_memalign(&ret
, 4096, 1024) != 0)
2489 memset(ret
, 0, 1024);
2490 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
2491 sb
->major_version
= __cpu_to_le32(1);
2493 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
2494 sprintf(sb
->set_name
, "%d", sb0
->md_minor
);
2495 sb
->ctime
= __cpu_to_le32(info
->array
.ctime
+1);
2496 sb
->level
= __cpu_to_le32(info
->array
.level
);
2497 sb
->layout
= __cpu_to_le32(info
->array
.layout
);
2498 sb
->size
= __cpu_to_le64(info
->component_size
);
2499 sb
->chunksize
= __cpu_to_le32(info
->array
.chunk_size
/512);
2500 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
2501 if (info
->array
.level
> 0)
2502 sb
->data_size
= sb
->size
;
2504 sb
->data_size
= st
->ss
->avail_size(st
, st
->devsize
/512, 0);
2505 sb
->resync_offset
= MaxSector
;
2506 sb
->max_dev
= __cpu_to_le32(MD_SB_DISKS
);
2507 sb
->dev_number
= __cpu_to_le32(info
->disk
.number
);
2508 sb
->utime
= __cpu_to_le64(info
->array
.utime
);
2510 offset
= st
->devsize
/512 - 8*2;
2512 sb
->super_offset
= __cpu_to_le64(offset
);
2513 //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset);
2515 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
2516 read(rfd
, sb
->device_uuid
, 16) != 16) {
2517 __u32 r
[4] = {random(), random(), random(), random()};
2518 memcpy(sb
->device_uuid
, r
, 16);
2523 for (i
= 0; i
< MD_SB_DISKS
; i
++) {
2524 int state
= sb0
->disks
[i
].state
;
2525 sb
->dev_roles
[i
] = MD_DISK_ROLE_SPARE
;
2526 if ((state
& (1<<MD_DISK_SYNC
)) &&
2527 !(state
& (1<<MD_DISK_FAULTY
)))
2528 sb
->dev_roles
[i
] = __cpu_to_le16(sb0
->disks
[i
].raid_disk
);
2530 sb
->sb_csum
= calc_sb_1_csum(sb
);
2534 struct superswitch super1
= {
2536 .examine_super
= examine_super1
,
2537 .brief_examine_super
= brief_examine_super1
,
2538 .export_examine_super
= export_examine_super1
,
2539 .detail_super
= detail_super1
,
2540 .brief_detail_super
= brief_detail_super1
,
2541 .export_detail_super
= export_detail_super1
,
2542 .write_init_super
= write_init_super1
,
2543 .validate_geometry
= validate_geometry1
,
2544 .add_to_super
= add_to_super1
,
2545 .examine_badblocks
= examine_badblocks_super1
,
2546 .copy_metadata
= copy_metadata1
,
2548 .match_home
= match_home1
,
2549 .uuid_from_super
= uuid_from_super1
,
2550 .getinfo_super
= getinfo_super1
,
2551 .container_content
= container_content1
,
2552 .update_super
= update_super1
,
2553 .init_super
= init_super1
,
2554 .store_super
= store_super1
,
2555 .compare_super
= compare_super1
,
2556 .load_super
= load_super1
,
2557 .match_metadata_desc
= match_metadata_desc1
,
2558 .avail_size
= avail_size1
,
2559 .add_internal_bitmap
= add_internal_bitmap1
,
2560 .locate_bitmap
= locate_bitmap1
,
2561 .write_bitmap
= write_bitmap1
,
2562 .free_super
= free_super1
,
2563 #if __BYTE_ORDER == BIG_ENDIAN