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 * 0, jouranl not required
145 * 1, journal required
146 * 2, no superblock loated (st->sb == NULL)
148 static int require_journal1(struct supertype
*st
)
150 struct mdp_superblock_1
*sb
= st
->sb
;
152 if (sb
->feature_map
& MD_FEATURE_JOURNAL
)
155 return 2; /* no sb loaded */
159 static int role_from_sb(struct mdp_superblock_1
*sb
)
164 d
= __le32_to_cpu(sb
->dev_number
);
165 if (d
< __le32_to_cpu(sb
->max_dev
))
166 role
= __le16_to_cpu(sb
->dev_roles
[d
]);
168 role
= MD_DISK_ROLE_SPARE
;
172 /* return how many bytes are needed for bitmap, for cluster-md each node
173 * should have it's own bitmap */
174 static unsigned int calc_bitmap_size(bitmap_super_t
*bms
, unsigned int boundary
)
176 unsigned long long bits
, bytes
;
178 bits
= __le64_to_cpu(bms
->sync_size
) / (__le32_to_cpu(bms
->chunksize
)>>9);
179 bytes
= (bits
+7) >> 3;
180 bytes
+= sizeof(bitmap_super_t
);
181 bytes
= ROUND_UP(bytes
, boundary
);
186 static unsigned int calc_sb_1_csum(struct mdp_superblock_1
* sb
)
188 unsigned int disk_csum
, csum
;
189 unsigned long long newcsum
;
190 int size
= sizeof(*sb
) + __le32_to_cpu(sb
->max_dev
)*2;
191 unsigned int *isuper
= (unsigned int*)sb
;
193 /* make sure I can count... */
194 if (offsetof(struct mdp_superblock_1
,data_offset
) != 128 ||
195 offsetof(struct mdp_superblock_1
, utime
) != 192 ||
196 sizeof(struct mdp_superblock_1
) != 256) {
197 fprintf(stderr
, "WARNING - superblock isn't sized correctly\n");
200 disk_csum
= sb
->sb_csum
;
203 for (; size
>=4; size
-= 4 ) {
204 newcsum
+= __le32_to_cpu(*isuper
);
209 newcsum
+= __le16_to_cpu(*(unsigned short*) isuper
);
211 csum
= (newcsum
& 0xffffffff) + (newcsum
>> 32);
212 sb
->sb_csum
= disk_csum
;
213 return __cpu_to_le32(csum
);
217 * Information related to file descriptor used for aligned reads/writes.
218 * Cache the block size.
225 static void init_afd(struct align_fd
*afd
, int fd
)
229 if (ioctl(afd
->fd
, BLKSSZGET
, &afd
->blk_sz
) != 0)
233 static char abuf
[4096+4096];
234 static int aread(struct align_fd
*afd
, void *buf
, int len
)
237 * On devices with a 4K sector size, we need to read
238 * the full sector and copy relevant bits into
247 if (!bsize
|| bsize
> 4096 || len
> 4096) {
249 fprintf(stderr
, "WARNING - aread() called with invalid block size\n");
252 b
= ROUND_UP_PTR((char *)abuf
, 4096);
254 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
256 n
= read(afd
->fd
, b
, iosize
);
259 lseek(afd
->fd
, len
- n
, 1);
266 static int awrite(struct align_fd
*afd
, void *buf
, int len
)
269 * On devices with a 4K sector size, we need to write
270 * the full sector. We pre-read if the sector is larger
272 * The address must be sector-aligned.
279 if (!bsize
|| bsize
> 4096 || len
> 4096) {
281 fprintf(stderr
, "WARNING - awrite() called with invalid block size\n");
284 b
= ROUND_UP_PTR((char *)abuf
, 4096);
286 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
290 n
= read(afd
->fd
, b
, iosize
);
293 lseek(afd
->fd
, -n
, 1);
297 n
= write(afd
->fd
, b
, iosize
);
300 lseek(afd
->fd
, len
- n
, 1);
305 static void examine_super1(struct supertype
*st
, char *homehost
)
307 struct mdp_superblock_1
*sb
= st
->sb
;
308 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+MAX_SB_SIZE
);
315 int l
= homehost
? strlen(homehost
) : 0;
317 unsigned long long sb_offset
;
320 printf(" Magic : %08x\n", __le32_to_cpu(sb
->magic
));
321 printf(" Version : 1");
322 sb_offset
= __le64_to_cpu(sb
->super_offset
);
325 else if (sb_offset
<= 8)
329 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb
->feature_map
));
330 printf(" Array UUID : ");
331 for (i
=0; i
<16; i
++) {
332 if ((i
&3)==0 && i
!= 0) printf(":");
333 printf("%02x", sb
->set_uuid
[i
]);
336 printf(" Name : %.32s", sb
->set_name
);
337 if (l
> 0 && l
< 32 &&
338 sb
->set_name
[l
] == ':' &&
339 strncmp(sb
->set_name
, homehost
, l
) == 0)
340 printf(" (local to host %s)", homehost
);
343 printf(" Cluster Name : %-64s\n", bms
->cluster_name
);
344 atime
= __le64_to_cpu(sb
->ctime
) & 0xFFFFFFFFFFULL
;
345 printf(" Creation Time : %.24s\n", ctime(&atime
));
346 c
=map_num(pers
, __le32_to_cpu(sb
->level
));
347 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
348 printf(" Raid Devices : %d\n", __le32_to_cpu(sb
->raid_disks
));
350 printf(" Avail Dev Size : %llu%s\n",
351 (unsigned long long)__le64_to_cpu(sb
->data_size
),
352 human_size(__le64_to_cpu(sb
->data_size
)<<9));
353 if (__le32_to_cpu(sb
->level
) > 0) {
354 int ddsks
= 0, ddsks_denom
= 1;
355 switch(__le32_to_cpu(sb
->level
)) {
356 case 1: ddsks
=1;break;
358 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
359 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
361 layout
= __le32_to_cpu(sb
->layout
);
362 ddsks
= __le32_to_cpu(sb
->raid_disks
);
363 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
366 long long asize
= __le64_to_cpu(sb
->size
);
367 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
368 printf(" Array Size : %llu%s\n",
369 asize
>> 10, human_size(asize
));
371 if (sb
->size
!= sb
->data_size
)
372 printf(" Used Dev Size : %llu%s\n",
373 (unsigned long long)__le64_to_cpu(sb
->size
),
374 human_size(__le64_to_cpu(sb
->size
)<<9));
377 printf(" Data Offset : %llu sectors\n",
378 (unsigned long long)__le64_to_cpu(sb
->data_offset
));
379 if (sb
->new_offset
&&
380 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
)) {
381 unsigned long long offset
= __le64_to_cpu(sb
->data_offset
);
382 offset
+= (signed)(int32_t)__le32_to_cpu(sb
->new_offset
);
383 printf(" New Offset : %llu sectors\n", offset
);
385 printf(" Super Offset : %llu sectors\n",
386 (unsigned long long)__le64_to_cpu(sb
->super_offset
));
387 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_RECOVERY_OFFSET
)
388 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb
->recovery_offset
));
390 st
->ss
->getinfo_super(st
, &info
, NULL
);
391 if (info
.space_after
!= 1 &&
392 !(__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
))
393 printf(" Unused Space : before=%llu sectors, after=%llu sectors\n",
394 info
.space_before
, info
.space_after
);
396 printf(" State : %s\n", (__le64_to_cpu(sb
->resync_offset
)+1)? "active":"clean");
397 printf(" Device UUID : ");
398 for (i
=0; i
<16; i
++) {
399 if ((i
&3)==0 && i
!= 0) printf(":");
400 printf("%02x", sb
->device_uuid
[i
]);
404 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
405 printf("Internal Bitmap : %ld sectors from superblock\n",
406 (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
));
408 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)) {
409 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb
->reshape_position
)/2,
410 human_size(__le64_to_cpu(sb
->reshape_position
)<<9));
411 if (__le32_to_cpu(sb
->delta_disks
)) {
412 printf(" Delta Devices : %d", __le32_to_cpu(sb
->delta_disks
));
413 printf(" (%d->%d)\n",
414 __le32_to_cpu(sb
->raid_disks
)-__le32_to_cpu(sb
->delta_disks
),
415 __le32_to_cpu(sb
->raid_disks
));
416 if ((int)__le32_to_cpu(sb
->delta_disks
) < 0)
417 delta_extra
= -__le32_to_cpu(sb
->delta_disks
);
419 if (__le32_to_cpu(sb
->new_level
) != __le32_to_cpu(sb
->level
)) {
420 c
= map_num(pers
, __le32_to_cpu(sb
->new_level
));
421 printf(" New Level : %s\n", c
?c
:"-unknown-");
423 if (__le32_to_cpu(sb
->new_layout
) != __le32_to_cpu(sb
->layout
)) {
424 if (__le32_to_cpu(sb
->level
) == 5) {
425 c
= map_num(r5layout
, __le32_to_cpu(sb
->new_layout
));
426 printf(" New Layout : %s\n", c
?c
:"-unknown-");
428 if (__le32_to_cpu(sb
->level
) == 6) {
429 c
= map_num(r6layout
, __le32_to_cpu(sb
->new_layout
));
430 printf(" New Layout : %s\n", c
?c
:"-unknown-");
432 if (__le32_to_cpu(sb
->level
) == 10) {
433 printf(" New Layout :");
434 print_r10_layout(__le32_to_cpu(sb
->new_layout
));
438 if (__le32_to_cpu(sb
->new_chunk
) != __le32_to_cpu(sb
->chunksize
))
439 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb
->new_chunk
)/2);
444 if (sb
->devflags
& WriteMostly1
)
445 printf(" write-mostly");
449 atime
= __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
;
450 printf(" Update Time : %.24s\n", ctime(&atime
));
452 if (sb
->bblog_size
&& sb
->bblog_offset
) {
453 printf(" Bad Block Log : %d entries available at offset %ld sectors",
454 __le16_to_cpu(sb
->bblog_size
)*512/8,
455 (long)(int32_t)__le32_to_cpu(sb
->bblog_offset
));
456 if (sb
->feature_map
&
457 __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
458 printf(" - bad blocks present.");
462 if (calc_sb_1_csum(sb
) == sb
->sb_csum
)
463 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb
->sb_csum
));
465 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb
->sb_csum
),
466 __le32_to_cpu(calc_sb_1_csum(sb
)));
467 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb
->events
));
469 if (__le32_to_cpu(sb
->level
) == 5) {
470 c
= map_num(r5layout
, __le32_to_cpu(sb
->layout
));
471 printf(" Layout : %s\n", c
?c
:"-unknown-");
473 if (__le32_to_cpu(sb
->level
) == 6) {
474 c
= map_num(r6layout
, __le32_to_cpu(sb
->layout
));
475 printf(" Layout : %s\n", c
?c
:"-unknown-");
477 if (__le32_to_cpu(sb
->level
) == 10) {
478 int lo
= __le32_to_cpu(sb
->layout
);
480 print_r10_layout(lo
);
483 switch(__le32_to_cpu(sb
->level
)) {
489 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
492 printf(" Rounding : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
498 /* This turns out to just be confusing */
499 printf(" Array Slot : %d (", __le32_to_cpu(sb
->dev_number
));
500 for (i
= __le32_to_cpu(sb
->max_dev
); i
> 0 ; i
--)
501 if (__le16_to_cpu(sb
->dev_roles
[i
-1]) != MD_DISK_ROLE_SPARE
)
503 for (d
=0; d
< i
; d
++) {
504 int role
= __le16_to_cpu(sb
->dev_roles
[d
]);
506 if (role
== MD_DISK_ROLE_SPARE
) printf("empty");
507 else if(role
== MD_DISK_ROLE_FAULTY
) printf("failed");
508 else printf("%d", role
);
512 printf(" Device Role : ");
513 role
= role_from_sb(sb
);
514 if (role
>= MD_DISK_ROLE_FAULTY
)
516 else if (role
== MD_DISK_ROLE_JOURNAL
)
518 else if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_REPLACEMENT
))
519 printf("Replacement device %d\n", role
);
521 printf("Active device %d\n", role
);
523 printf(" Array State : ");
524 for (d
=0; d
<__le32_to_cpu(sb
->raid_disks
) + delta_extra
; d
++) {
527 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
528 unsigned int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
542 /* This is confusing too */
544 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
545 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
546 if (role
== MD_DISK_ROLE_FAULTY
)
549 if (faulty
) printf(" %d failed", faulty
);
551 printf(" ('A' == active, '.' == missing, 'R' == replacing)");
555 static void brief_examine_super1(struct supertype
*st
, int verbose
)
557 struct mdp_superblock_1
*sb
= st
->sb
;
559 unsigned long long sb_offset
;
561 char *c
=map_num(pers
, __le32_to_cpu(sb
->level
));
563 nm
= strchr(sb
->set_name
, ':');
566 else if (sb
->set_name
[0])
578 printf(" level=%s", c
);
579 sb_offset
= __le64_to_cpu(sb
->super_offset
);
581 printf(" metadata=1.1 ");
582 else if (sb_offset
<= 8)
583 printf(" metadata=1.2 ");
585 printf(" metadata=1.0 ");
587 printf("num-devices=%d ", __le32_to_cpu(sb
->raid_disks
));
589 for (i
=0; i
<16; i
++) {
590 if ((i
&3)==0 && i
!= 0) printf(":");
591 printf("%02x", sb
->set_uuid
[i
]);
593 if (sb
->set_name
[0]) {
595 print_quoted(sb
->set_name
);
600 static void export_examine_super1(struct supertype
*st
)
602 struct mdp_superblock_1
*sb
= st
->sb
;
607 printf("MD_LEVEL=%s\n", map_num(pers
, __le32_to_cpu(sb
->level
)));
608 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb
->raid_disks
));
610 if (sb
->set_name
[i
] == '\n' ||
611 sb
->set_name
[i
] == '\0') {
616 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
617 if (__le32_to_cpu(sb
->level
) > 0) {
618 int ddsks
= 0, ddsks_denom
= 1;
619 switch(__le32_to_cpu(sb
->level
)) {
620 case 1: ddsks
=1;break;
622 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
623 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
625 layout
= __le32_to_cpu(sb
->layout
);
626 ddsks
= __le32_to_cpu(sb
->raid_disks
);
627 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
630 long long asize
= __le64_to_cpu(sb
->size
);
631 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
632 printf("MD_ARRAY_SIZE=%s\n",human_size_brief(asize
,JEDEC
));
636 for (i
=0; i
<16; i
++) {
637 if ((i
&3)==0 && i
!= 0) printf(":");
638 printf("%02x", sb
->set_uuid
[i
]);
641 printf("MD_UPDATE_TIME=%llu\n",
642 __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
);
643 printf("MD_DEV_UUID=");
644 for (i
=0; i
<16; i
++) {
645 if ((i
&3)==0 && i
!= 0) printf(":");
646 printf("%02x", sb
->device_uuid
[i
]);
649 printf("MD_EVENTS=%llu\n",
650 (unsigned long long)__le64_to_cpu(sb
->events
));
653 static int copy_metadata1(struct supertype
*st
, int from
, int to
)
655 /* Read superblock. If it looks good, write it out.
656 * Then if a bitmap is present, copy that.
657 * And if a bad-block-list is present, copy that too.
660 unsigned long long dsize
, sb_offset
;
661 const int bufsize
= 4*1024;
662 struct mdp_superblock_1 super
, *sb
;
664 if (posix_memalign(&buf
, 4096, bufsize
) != 0)
667 if (!get_dev_size(from
, NULL
, &dsize
))
673 switch(st
->minor_version
) {
677 sb_offset
&= ~(4*2-1);
689 if (lseek64(from
, sb_offset
<< 9, 0) < 0LL)
691 if (read(from
, buf
, bufsize
) != bufsize
)
695 super
= *sb
; // save most of sb for when we reuse buf
697 if (__le32_to_cpu(super
.magic
) != MD_SB_MAGIC
||
698 __le32_to_cpu(super
.major_version
) != 1 ||
699 __le64_to_cpu(super
.super_offset
) != sb_offset
||
700 calc_sb_1_csum(sb
) != super
.sb_csum
)
703 if (lseek64(to
, sb_offset
<< 9, 0) < 0LL)
705 if (write(to
, buf
, bufsize
) != bufsize
)
708 if (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
709 unsigned long long bitmap_offset
= sb_offset
;
710 int bytes
= 4096; // just an estimate.
712 struct align_fd afrom
, ato
;
714 init_afd(&afrom
, from
);
717 bitmap_offset
+= (int32_t)__le32_to_cpu(super
.bitmap_offset
);
719 if (lseek64(from
, bitmap_offset
<<9, 0) < 0)
721 if (lseek64(to
, bitmap_offset
<<9, 0) < 0)
724 for (written
= 0; written
< bytes
; ) {
725 int n
= bytes
- written
;
728 if (aread(&afrom
, buf
, n
) != n
)
731 /* have the header, can calculate
732 * correct bitmap bytes */
735 bytes
= calc_bitmap_size(bms
, 512);
739 if (awrite(&ato
, buf
, n
) != n
)
745 if (super
.bblog_size
!= 0 &&
746 __le32_to_cpu(super
.bblog_size
) <= 100 &&
747 super
.bblog_offset
!= 0 &&
748 (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BAD_BLOCKS
))) {
749 /* There is a bad block log */
750 unsigned long long bb_offset
= sb_offset
;
751 int bytes
= __le32_to_cpu(super
.bblog_size
) * 512;
753 struct align_fd afrom
, ato
;
755 init_afd(&afrom
, from
);
758 bb_offset
+= (int32_t)__le32_to_cpu(super
.bblog_offset
);
760 if (lseek64(from
, bb_offset
<<9, 0) < 0)
762 if (lseek64(to
, bb_offset
<<9, 0) < 0)
765 for (written
= 0; written
< bytes
; ) {
766 int n
= bytes
- written
;
769 if (aread(&afrom
, buf
, n
) != n
)
772 if (awrite(&ato
, buf
, n
) != n
)
786 static void detail_super1(struct supertype
*st
, char *homehost
)
788 struct mdp_superblock_1
*sb
= st
->sb
;
789 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
791 int l
= homehost
? strlen(homehost
) : 0;
793 printf(" Name : %.32s", sb
->set_name
);
794 if (l
> 0 && l
< 32 &&
795 sb
->set_name
[l
] == ':' &&
796 strncmp(sb
->set_name
, homehost
, l
) == 0)
797 printf(" (local to host %s)", homehost
);
799 printf("\n Cluster Name : %-64s", bms
->cluster_name
);
800 printf("\n UUID : ");
801 for (i
=0; i
<16; i
++) {
802 if ((i
&3)==0 && i
!= 0) printf(":");
803 printf("%02x", sb
->set_uuid
[i
]);
805 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb
->events
));
808 static void brief_detail_super1(struct supertype
*st
)
810 struct mdp_superblock_1
*sb
= st
->sb
;
813 if (sb
->set_name
[0]) {
815 print_quoted(sb
->set_name
);
818 for (i
=0; i
<16; i
++) {
819 if ((i
&3)==0 && i
!= 0) printf(":");
820 printf("%02x", sb
->set_uuid
[i
]);
824 static void export_detail_super1(struct supertype
*st
)
826 struct mdp_superblock_1
*sb
= st
->sb
;
831 if (sb
->set_name
[i
] == '\n' ||
832 sb
->set_name
[i
] == '\0') {
837 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
840 static int examine_badblocks_super1(struct supertype
*st
, int fd
, char *devname
)
842 struct mdp_superblock_1
*sb
= st
->sb
;
843 unsigned long long offset
;
848 if (!sb
->bblog_size
|| __le32_to_cpu(sb
->bblog_size
) > 100
849 || !sb
->bblog_offset
){
850 printf("No bad-blocks list configured on %s\n", devname
);
853 if ((sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
855 printf("Bad-blocks list is empty in %s\n", devname
);
859 size
= __le32_to_cpu(sb
->bblog_size
)* 512;
860 if (posix_memalign((void**)&bbl
, 4096, size
) != 0) {
861 pr_err("could not allocate badblocks list\n");
864 offset
= __le64_to_cpu(sb
->super_offset
) +
865 (int)__le32_to_cpu(sb
->bblog_offset
);
867 if (lseek64(fd
, offset
, 0) < 0) {
868 pr_err("Cannot seek to bad-blocks list\n");
871 if (read(fd
, bbl
, size
) != size
) {
872 pr_err("Cannot read bad-blocks list\n");
875 /* 64bits per entry. 10 bits is block-count, 54 bits is block
876 * offset. Blocks are sectors unless bblog->shift makes them bigger
879 printf("Bad-blocks on %s:\n", devname
);
880 for (i
= 0; i
< size
/8; i
++, bbp
++) {
881 __u64 bb
= __le64_to_cpu(*bbp
);
882 int count
= bb
& 0x3ff;
883 unsigned long long sector
= bb
>> 10;
888 sector
<<= sb
->bblog_shift
;
889 count
<<= sb
->bblog_shift
;
891 printf("%20llu for %d sectors\n", sector
, count
);
898 static int match_home1(struct supertype
*st
, char *homehost
)
900 struct mdp_superblock_1
*sb
= st
->sb
;
901 int l
= homehost
? strlen(homehost
) : 0;
903 return (l
> 0 && l
< 32 &&
904 sb
->set_name
[l
] == ':' &&
905 strncmp(sb
->set_name
, homehost
, l
) == 0);
908 static void uuid_from_super1(struct supertype
*st
, int uuid
[4])
910 struct mdp_superblock_1
*super
= st
->sb
;
911 char *cuuid
= (char*)uuid
;
914 cuuid
[i
] = super
->set_uuid
[i
];
917 static void getinfo_super1(struct supertype
*st
, struct mdinfo
*info
, char *map
)
919 struct mdp_superblock_1
*sb
= st
->sb
;
920 struct bitmap_super_s
*bsb
= (void*)(((char*)sb
)+MAX_SB_SIZE
);
921 struct misc_dev_info
*misc
= (void*)(((char*)sb
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
925 unsigned int map_disks
= info
->array
.raid_disks
;
926 unsigned long long super_offset
;
927 unsigned long long data_size
;
929 memset(info
, 0, sizeof(*info
));
930 info
->array
.major_version
= 1;
931 info
->array
.minor_version
= st
->minor_version
;
932 info
->array
.patch_version
= 0;
933 info
->array
.raid_disks
= __le32_to_cpu(sb
->raid_disks
);
934 info
->array
.level
= __le32_to_cpu(sb
->level
);
935 info
->array
.layout
= __le32_to_cpu(sb
->layout
);
936 info
->array
.md_minor
= -1;
937 info
->array
.ctime
= __le64_to_cpu(sb
->ctime
);
938 info
->array
.utime
= __le64_to_cpu(sb
->utime
);
939 info
->array
.chunk_size
= __le32_to_cpu(sb
->chunksize
)*512;
941 (__le64_to_cpu(sb
->resync_offset
) == MaxSector
)
943 if (__le32_to_cpu(bsb
->nodes
) > 1)
944 info
->array
.state
|= (1 << MD_SB_CLUSTERED
);
946 info
->data_offset
= __le64_to_cpu(sb
->data_offset
);
947 info
->component_size
= __le64_to_cpu(sb
->size
);
948 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
))
949 info
->bitmap_offset
= (int32_t)__le32_to_cpu(sb
->bitmap_offset
);
951 info
->disk
.major
= 0;
952 info
->disk
.minor
= 0;
953 info
->disk
.number
= __le32_to_cpu(sb
->dev_number
);
954 if (__le32_to_cpu(sb
->dev_number
) >= __le32_to_cpu(sb
->max_dev
) ||
955 __le32_to_cpu(sb
->dev_number
) >= MAX_DEVS
)
956 role
= MD_DISK_ROLE_FAULTY
;
958 role
= __le16_to_cpu(sb
->dev_roles
[__le32_to_cpu(sb
->dev_number
)]);
960 super_offset
= __le64_to_cpu(sb
->super_offset
);
961 if (info
->array
.level
<= 0)
962 data_size
= __le64_to_cpu(sb
->data_size
);
964 data_size
= __le64_to_cpu(sb
->size
);
965 if (info
->data_offset
< super_offset
) {
966 unsigned long long end
;
967 info
->space_before
= info
->data_offset
;
970 if (sb
->bblog_offset
&& sb
->bblog_size
) {
971 unsigned long long bboffset
= super_offset
;
972 bboffset
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
977 if (super_offset
+ info
->bitmap_offset
< end
)
978 end
= super_offset
+ info
->bitmap_offset
;
980 if (info
->data_offset
+ data_size
< end
)
981 info
->space_after
= end
- data_size
- info
->data_offset
;
983 info
->space_after
= 0;
985 unsigned long long earliest
;
986 earliest
= super_offset
+ (32+4)*2; /* match kernel */
987 if (info
->bitmap_offset
> 0) {
988 unsigned long long bmend
= info
->bitmap_offset
;
989 unsigned long long size
= __le64_to_cpu(bsb
->sync_size
);
990 size
/= __le32_to_cpu(bsb
->chunksize
) >> 9;
991 size
= (size
+ 7) >> 3;
992 size
+= sizeof(bitmap_super_t
);
993 size
= ROUND_UP(size
, 4096);
996 if (bmend
> earliest
)
999 if (sb
->bblog_offset
&& sb
->bblog_size
) {
1000 unsigned long long bbend
= super_offset
;
1001 bbend
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
1002 bbend
+= __le32_to_cpu(sb
->bblog_size
);
1003 if (bbend
> earliest
)
1006 if (earliest
< info
->data_offset
)
1007 info
->space_before
= info
->data_offset
- earliest
;
1009 info
->space_before
= 0;
1010 info
->space_after
= misc
->device_size
- data_size
- info
->data_offset
;
1012 if (info
->space_before
== 0 && info
->space_after
== 0) {
1013 /* It will look like we don't support data_offset changes,
1014 * be we do - it's just that there is no room.
1015 * A change that reduced the number of devices should
1016 * still be allowed, so set the otherwise useless value of '1'
1018 info
->space_after
= 1;
1021 info
->disk
.raid_disk
= -1;
1023 case MD_DISK_ROLE_SPARE
:
1024 info
->disk
.state
= 0; /* spare: not active, not sync, not faulty */
1026 case MD_DISK_ROLE_FAULTY
:
1027 info
->disk
.state
= 1; /* faulty */
1029 case MD_DISK_ROLE_JOURNAL
:
1030 info
->disk
.state
= (1 << MD_DISK_JOURNAL
);
1031 info
->disk
.raid_disk
= role
;
1032 info
->space_after
= (misc
->device_size
- info
->data_offset
) % 8; /* journal uses all 4kB blocks*/
1035 info
->disk
.state
= 6; /* active and in sync */
1036 info
->disk
.raid_disk
= role
;
1038 if (sb
->devflags
& WriteMostly1
)
1039 info
->disk
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
1040 info
->events
= __le64_to_cpu(sb
->events
);
1041 sprintf(info
->text_version
, "1.%d", st
->minor_version
);
1042 info
->safe_mode_delay
= 200;
1044 memcpy(info
->uuid
, sb
->set_uuid
, 16);
1046 strncpy(info
->name
, sb
->set_name
, 32);
1049 if ((__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_REPLACEMENT
)) {
1050 info
->disk
.state
&= ~(1 << MD_DISK_SYNC
);
1051 info
->disk
.state
|= 1 << MD_DISK_REPLACEMENT
;
1054 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET
))
1055 info
->recovery_start
= __le32_to_cpu(sb
->recovery_offset
);
1057 info
->recovery_start
= MaxSector
;
1059 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
1060 info
->reshape_active
= 1;
1061 if ((sb
->feature_map
& __le32_to_cpu(MD_FEATURE_NEW_OFFSET
)) &&
1062 sb
->new_offset
!= 0)
1063 info
->reshape_active
|= RESHAPE_NO_BACKUP
;
1064 info
->reshape_progress
= __le64_to_cpu(sb
->reshape_position
);
1065 info
->new_level
= __le32_to_cpu(sb
->new_level
);
1066 info
->delta_disks
= __le32_to_cpu(sb
->delta_disks
);
1067 info
->new_layout
= __le32_to_cpu(sb
->new_layout
);
1068 info
->new_chunk
= __le32_to_cpu(sb
->new_chunk
)<<9;
1069 if (info
->delta_disks
< 0)
1070 info
->array
.raid_disks
-= info
->delta_disks
;
1072 info
->reshape_active
= 0;
1074 info
->recovery_blocked
= info
->reshape_active
;
1077 for (i
=0; i
<map_disks
; i
++)
1079 for (i
= 0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
1080 role
= __le16_to_cpu(sb
->dev_roles
[i
]);
1081 if (/*role == MD_DISK_ROLE_SPARE || */role
< (unsigned) info
->array
.raid_disks
) {
1083 if (map
&& role
< map_disks
)
1088 info
->array
.working_disks
= working
;
1091 static struct mdinfo
*container_content1(struct supertype
*st
, char *subarray
)
1093 struct mdinfo
*info
;
1098 info
= xmalloc(sizeof(*info
));
1099 getinfo_super1(st
, info
, NULL
);
1103 static int update_super1(struct supertype
*st
, struct mdinfo
*info
,
1105 char *devname
, int verbose
,
1106 int uuid_set
, char *homehost
)
1108 /* NOTE: for 'assemble' and 'force' we need to return non-zero
1109 * if any change was made. For others, the return value is
1113 struct mdp_superblock_1
*sb
= st
->sb
;
1115 if (strcmp(update
, "homehost") == 0 &&
1117 /* Note that 'homehost' is special as it is really
1122 c
= strchr(sb
->set_name
, ':');
1124 strncpy(info
->name
, c
+1, 31 - (c
-sb
->set_name
));
1126 strncpy(info
->name
, sb
->set_name
, 32);
1130 if (strcmp(update
, "force-one")==0) {
1131 /* Not enough devices for a working array,
1132 * so bring this one up-to-date
1134 if (sb
->events
!= __cpu_to_le64(info
->events
))
1136 sb
->events
= __cpu_to_le64(info
->events
);
1137 } else if (strcmp(update
, "force-array")==0) {
1138 /* Degraded array and 'force' requests to
1139 * maybe need to mark it 'clean'.
1141 switch(__le32_to_cpu(sb
->level
)) {
1142 case 5: case 4: case 6:
1143 /* need to force clean */
1144 if (sb
->resync_offset
!= MaxSector
)
1146 sb
->resync_offset
= MaxSector
;
1148 } else if (strcmp(update
, "assemble")==0) {
1149 int d
= info
->disk
.number
;
1151 if (info
->disk
.state
& (1<<MD_DISK_ACTIVE
))
1152 want
= info
->disk
.raid_disk
;
1153 else if (info
->disk
.state
& (1<<MD_DISK_JOURNAL
))
1154 want
= MD_DISK_ROLE_JOURNAL
;
1156 want
= MD_DISK_ROLE_SPARE
;
1157 if (sb
->dev_roles
[d
] != __cpu_to_le16(want
)) {
1158 sb
->dev_roles
[d
] = __cpu_to_le16(want
);
1161 if (info
->reshape_active
&&
1162 sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1163 info
->delta_disks
>= 0 &&
1164 info
->reshape_progress
< __le64_to_cpu(sb
->reshape_position
)) {
1165 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1168 if (info
->reshape_active
&&
1169 sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1170 info
->delta_disks
< 0 &&
1171 info
->reshape_progress
> __le64_to_cpu(sb
->reshape_position
)) {
1172 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1175 } else if (strcmp(update
, "linear-grow-new") == 0) {
1178 unsigned int max
= __le32_to_cpu(sb
->max_dev
);
1180 for (i
=0 ; i
< max
; i
++)
1181 if (__le16_to_cpu(sb
->dev_roles
[i
]) >= MD_DISK_ROLE_FAULTY
)
1183 sb
->dev_number
= __cpu_to_le32(i
);
1184 info
->disk
.number
= i
;
1185 if (max
>= __le32_to_cpu(sb
->max_dev
))
1186 sb
->max_dev
= __cpu_to_le32(max
+1);
1188 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1189 read(rfd
, sb
->device_uuid
, 16) != 16) {
1190 __u32 r
[4] = {random(), random(), random(), random()};
1191 memcpy(sb
->device_uuid
, r
, 16);
1197 __cpu_to_le16(info
->disk
.raid_disk
);
1199 fd
= open(devname
, O_RDONLY
);
1201 unsigned long long ds
;
1202 get_dev_size(fd
, devname
, &ds
);
1205 if (__le64_to_cpu(sb
->super_offset
) <
1206 __le64_to_cpu(sb
->data_offset
)) {
1207 sb
->data_size
= __cpu_to_le64(
1208 ds
- __le64_to_cpu(sb
->data_offset
));
1211 ds
&= ~(unsigned long long)(4*2-1);
1212 sb
->super_offset
= __cpu_to_le64(ds
);
1213 sb
->data_size
= __cpu_to_le64(
1214 ds
- __le64_to_cpu(sb
->data_offset
));
1217 } else if (strcmp(update
, "linear-grow-update") == 0) {
1218 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
1219 sb
->dev_roles
[info
->disk
.number
] =
1220 __cpu_to_le16(info
->disk
.raid_disk
);
1221 } else if (strcmp(update
, "resync") == 0) {
1222 /* make sure resync happens */
1223 sb
->resync_offset
= 0ULL;
1224 } else if (strcmp(update
, "uuid") == 0) {
1225 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
1227 if (__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
1228 struct bitmap_super_s
*bm
;
1229 bm
= (struct bitmap_super_s
*)(st
->sb
+MAX_SB_SIZE
);
1230 memcpy(bm
->uuid
, sb
->set_uuid
, 16);
1232 } else if (strcmp(update
, "no-bitmap") == 0) {
1233 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
);
1234 } else if (strcmp(update
, "bbl") == 0) {
1235 /* only possible if there is room after the bitmap, or if
1236 * there is no bitmap
1238 unsigned long long sb_offset
= __le64_to_cpu(sb
->super_offset
);
1239 unsigned long long data_offset
= __le64_to_cpu(sb
->data_offset
);
1240 long bitmap_offset
= (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
);
1241 long bm_sectors
= 0;
1245 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1246 struct bitmap_super_s
*bsb
;
1247 bsb
= (struct bitmap_super_s
*)(((char*)sb
)+MAX_SB_SIZE
);
1248 bm_sectors
= bitmap_sectors(bsb
);
1251 if (sb_offset
< data_offset
) {
1252 /* 1.1 or 1.2. Put bbl after bitmap leaving at least 32K
1255 bb_offset
= sb_offset
+ 8;
1256 if (bm_sectors
&& bitmap_offset
> 0)
1257 bb_offset
= bitmap_offset
+ bm_sectors
;
1258 while (bb_offset
< (long)sb_offset
+ 8 + 32*2
1259 && bb_offset
+ 8+8 <= (long)data_offset
)
1260 /* too close to bitmap, and room to grow */
1262 if (bb_offset
+ 8 <= (long)data_offset
) {
1263 sb
->bblog_size
= __cpu_to_le16(8);
1264 sb
->bblog_offset
= __cpu_to_le32(bb_offset
);
1267 /* 1.0 - Put bbl just before super block */
1268 if (bm_sectors
&& bitmap_offset
< 0)
1269 space
= -bitmap_offset
- bm_sectors
;
1271 space
= sb_offset
- data_offset
-
1272 __le64_to_cpu(sb
->data_size
);
1274 sb
->bblog_size
= __cpu_to_le16(8);
1275 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1278 } else if (strcmp(update
, "no-bbl") == 0) {
1279 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
1280 pr_err("Cannot remove active bbl from %s\n",devname
);
1283 sb
->bblog_shift
= 0;
1284 sb
->bblog_offset
= 0;
1286 } else if (strcmp(update
, "name") == 0) {
1287 if (info
->name
[0] == 0)
1288 sprintf(info
->name
, "%d", info
->array
.md_minor
);
1289 memset(sb
->set_name
, 0, sizeof(sb
->set_name
));
1291 strchr(info
->name
, ':') == NULL
&&
1292 strlen(homehost
)+1+strlen(info
->name
) < 32) {
1293 strcpy(sb
->set_name
, homehost
);
1294 strcat(sb
->set_name
, ":");
1295 strcat(sb
->set_name
, info
->name
);
1297 strcpy(sb
->set_name
, info
->name
);
1298 } else if (strcmp(update
, "devicesize") == 0 &&
1299 __le64_to_cpu(sb
->super_offset
) <
1300 __le64_to_cpu(sb
->data_offset
)) {
1301 /* set data_size to device size less data_offset */
1302 struct misc_dev_info
*misc
= (struct misc_dev_info
*)
1303 (st
->sb
+ MAX_SB_SIZE
+ BM_SUPER_SIZE
);
1304 sb
->data_size
= __cpu_to_le64(
1305 misc
->device_size
- __le64_to_cpu(sb
->data_offset
));
1306 } else if (strcmp(update
, "revert-reshape") == 0) {
1308 if (!(sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)))
1309 pr_err("No active reshape to revert on %s\n",
1313 unsigned long long reshape_sectors
;
1316 /* reshape_position is a little messy.
1317 * Its value must be a multiple of the larger
1318 * chunk size, and of the "after" data disks.
1319 * So when reverting we need to change it to
1320 * be a multiple of the new "after" data disks,
1321 * which is the old "before".
1322 * If it isn't already a multiple of 'before',
1323 * the only thing we could do would be
1324 * copy some block around on the disks, which
1325 * is easy to get wrong.
1326 * So we reject a revert-reshape unless the
1327 * alignment is good.
1329 if (__le32_to_cpu(sb
->level
) >= 4 &&
1330 __le32_to_cpu(sb
->level
) <= 6) {
1331 reshape_sectors
= __le64_to_cpu(sb
->reshape_position
);
1332 reshape_chunk
= __le32_to_cpu(sb
->new_chunk
);
1333 reshape_chunk
*= __le32_to_cpu(sb
->raid_disks
) - __le32_to_cpu(sb
->delta_disks
) -
1334 (__le32_to_cpu(sb
->level
)==6 ? 2 : 1);
1335 if (reshape_sectors
% reshape_chunk
) {
1336 pr_err("Reshape position is not suitably aligned.\n");
1337 pr_err("Try normal assembly and stop again\n");
1341 sb
->raid_disks
= __cpu_to_le32(__le32_to_cpu(sb
->raid_disks
) -
1342 __le32_to_cpu(sb
->delta_disks
));
1343 if (sb
->delta_disks
== 0)
1344 sb
->feature_map
^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS
);
1346 sb
->delta_disks
= __cpu_to_le32(-__le32_to_cpu(sb
->delta_disks
));
1348 temp
= sb
->new_layout
;
1349 sb
->new_layout
= sb
->layout
;
1352 temp
= sb
->new_chunk
;
1353 sb
->new_chunk
= sb
->chunksize
;
1354 sb
->chunksize
= temp
;
1356 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_NEW_OFFSET
)) {
1357 long offset_delta
= (int32_t)__le32_to_cpu(sb
->new_offset
);
1358 sb
->data_offset
= __cpu_to_le64(__le64_to_cpu(sb
->data_offset
) + offset_delta
);
1359 sb
->new_offset
= __cpu_to_le32(-offset_delta
);
1360 sb
->data_size
= __cpu_to_le64(__le64_to_cpu(sb
->data_size
) - offset_delta
);
1363 } else if (strcmp(update
, "_reshape_progress")==0)
1364 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1365 else if (strcmp(update
, "writemostly")==0)
1366 sb
->devflags
|= WriteMostly1
;
1367 else if (strcmp(update
, "readwrite")==0)
1368 sb
->devflags
&= ~WriteMostly1
;
1372 sb
->sb_csum
= calc_sb_1_csum(sb
);
1376 static int init_super1(struct supertype
*st
, mdu_array_info_t
*info
,
1377 unsigned long long size
, char *name
, char *homehost
,
1378 int *uuid
, unsigned long long data_offset
)
1380 struct mdp_superblock_1
*sb
;
1386 if (posix_memalign((void**)&sb
, 4096, SUPER1_SIZE
) != 0) {
1387 pr_err("could not allocate superblock\n");
1390 memset(sb
, 0, SUPER1_SIZE
);
1394 /* zeroing superblock */
1398 spares
= info
->working_disks
- info
->active_disks
;
1399 if (info
->raid_disks
+ spares
> MAX_DEVS
) {
1400 pr_err("too many devices requested: %d+%d > %d\n",
1401 info
->raid_disks
, spares
, MAX_DEVS
);
1405 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
1406 sb
->major_version
= __cpu_to_le32(1);
1407 sb
->feature_map
= 0;
1411 copy_uuid(sb
->set_uuid
, uuid
, super1
.swapuuid
);
1413 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1414 read(rfd
, sb
->set_uuid
, 16) != 16) {
1415 __u32 r
[4] = {random(), random(), random(), random()};
1416 memcpy(sb
->set_uuid
, r
, 16);
1418 if (rfd
>= 0) close(rfd
);
1421 if (name
== NULL
|| *name
== 0) {
1422 sprintf(defname
, "%d", info
->md_minor
);
1426 strchr(name
, ':')== NULL
&&
1427 strlen(homehost
)+1+strlen(name
) < 32) {
1428 strcpy(sb
->set_name
, homehost
);
1429 strcat(sb
->set_name
, ":");
1430 strcat(sb
->set_name
, name
);
1432 strcpy(sb
->set_name
, name
);
1434 sb
->ctime
= __cpu_to_le64((unsigned long long)time(0));
1435 sb
->level
= __cpu_to_le32(info
->level
);
1436 sb
->layout
= __cpu_to_le32(info
->layout
);
1437 sb
->size
= __cpu_to_le64(size
*2ULL);
1438 sb
->chunksize
= __cpu_to_le32(info
->chunk_size
>>9);
1439 sb
->raid_disks
= __cpu_to_le32(info
->raid_disks
);
1441 sb
->data_offset
= __cpu_to_le64(data_offset
);
1442 sb
->data_size
= __cpu_to_le64(0);
1443 sb
->super_offset
= __cpu_to_le64(0);
1444 sb
->recovery_offset
= __cpu_to_le64(0);
1446 sb
->utime
= sb
->ctime
;
1447 sb
->events
= __cpu_to_le64(1);
1448 if (info
->state
& (1<<MD_SB_CLEAN
))
1449 sb
->resync_offset
= MaxSector
;
1451 sb
->resync_offset
= 0;
1452 sbsize
= sizeof(struct mdp_superblock_1
) + 2 * (info
->raid_disks
+ spares
);
1453 sbsize
= ROUND_UP(sbsize
, 512);
1454 sb
->max_dev
= __cpu_to_le32((sbsize
- sizeof(struct mdp_superblock_1
)) / 2);
1456 memset(sb
->dev_roles
, 0xff, MAX_SB_SIZE
- sizeof(struct mdp_superblock_1
));
1464 long long data_offset
;
1465 mdu_disk_info_t disk
;
1466 struct devinfo
*next
;
1469 /* Add a device to the superblock being created */
1470 static int add_to_super1(struct supertype
*st
, mdu_disk_info_t
*dk
,
1471 int fd
, char *devname
, unsigned long long data_offset
)
1473 struct mdp_superblock_1
*sb
= st
->sb
;
1474 __u16
*rp
= sb
->dev_roles
+ dk
->number
;
1475 struct devinfo
*di
, **dip
;
1477 if ((dk
->state
& 6) == 6) /* active, sync */
1478 *rp
= __cpu_to_le16(dk
->raid_disk
);
1479 else if (dk
->state
& (1<<MD_DISK_JOURNAL
))
1480 *rp
= MD_DISK_ROLE_JOURNAL
;
1481 else if ((dk
->state
& ~2) == 0) /* active or idle -> spare */
1482 *rp
= MD_DISK_ROLE_SPARE
;
1484 *rp
= MD_DISK_ROLE_FAULTY
;
1486 if (dk
->number
>= (int)__le32_to_cpu(sb
->max_dev
) &&
1487 __le32_to_cpu(sb
->max_dev
) < MAX_DEVS
)
1488 sb
->max_dev
= __cpu_to_le32(dk
->number
+1);
1490 sb
->dev_number
= __cpu_to_le32(dk
->number
);
1491 sb
->devflags
= 0; /* don't copy another disks flags */
1492 sb
->sb_csum
= calc_sb_1_csum(sb
);
1494 dip
= (struct devinfo
**)&st
->info
;
1496 dip
= &(*dip
)->next
;
1497 di
= xmalloc(sizeof(struct devinfo
));
1499 di
->devname
= devname
;
1501 di
->data_offset
= data_offset
;
1509 static void locate_bitmap1(struct supertype
*st
, int fd
);
1511 static int store_super1(struct supertype
*st
, int fd
)
1513 struct mdp_superblock_1
*sb
= st
->sb
;
1514 unsigned long long sb_offset
;
1515 struct align_fd afd
;
1517 unsigned long long dsize
;
1519 if (!get_dev_size(fd
, NULL
, &dsize
))
1530 * Calculate the position of the superblock.
1531 * It is always aligned to a 4K boundary and
1532 * depending on minor_version, it can be:
1533 * 0: At least 8K, but less than 12K, from end of device
1534 * 1: At start of device
1535 * 2: 4K from start of device.
1537 switch(st
->minor_version
) {
1541 sb_offset
&= ~(4*2-1);
1553 if (sb_offset
!= __le64_to_cpu(sb
->super_offset
) &&
1554 0 != __le64_to_cpu(sb
->super_offset
)
1556 pr_err("internal error - sb_offset is wrong\n");
1560 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL)
1563 sbsize
= ROUND_UP(sizeof(*sb
) + 2 * __le32_to_cpu(sb
->max_dev
), 512);
1565 if (awrite(&afd
, sb
, sbsize
) != sbsize
)
1568 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1569 struct bitmap_super_s
*bm
= (struct bitmap_super_s
*)
1570 (((char*)sb
)+MAX_SB_SIZE
);
1571 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
) {
1572 locate_bitmap1(st
, fd
);
1573 if (awrite(&afd
, bm
, sizeof(*bm
)) != sizeof(*bm
))
1581 static int load_super1(struct supertype
*st
, int fd
, char *devname
);
1583 static unsigned long choose_bm_space(unsigned long devsize
)
1585 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
1586 * if bigger than 200Gig, save 128k
1587 * NOTE: result must be multiple of 4K else bad things happen
1588 * on 4K-sector devices.
1590 if (devsize
< 64*2) return 0;
1591 if (devsize
- 64*2 >= 200*1024*1024*2)
1593 if (devsize
- 4*2 > 8*1024*1024*2)
1598 static void free_super1(struct supertype
*st
);
1600 #define META_BLOCK_SIZE 4096
1601 unsigned long crc32(
1603 const unsigned char *buf
,
1606 static int write_empty_r5l_meta_block(struct supertype
*st
, int fd
)
1608 struct r5l_meta_block
*mb
;
1609 struct mdp_superblock_1
*sb
= st
->sb
;
1610 struct align_fd afd
;
1615 if (posix_memalign((void**)&mb
, 4096, META_BLOCK_SIZE
) != 0) {
1616 pr_err("Could not allocate memory for the meta block.\n");
1620 memset(mb
, 0, META_BLOCK_SIZE
);
1622 mb
->magic
= __cpu_to_le32(R5LOG_MAGIC
);
1623 mb
->version
= R5LOG_VERSION
;
1624 mb
->meta_size
= __cpu_to_le32(sizeof(struct r5l_meta_block
));
1625 mb
->seq
= __cpu_to_le64(random32());
1626 mb
->position
= __cpu_to_le64(0);
1628 crc
= crc32(0xffffffff, sb
->set_uuid
, sizeof(sb
->set_uuid
));
1629 crc
= crc32(crc
, (void *)mb
, META_BLOCK_SIZE
);
1630 mb
->checksum
= __cpu_to_le32(crc
);
1632 if (lseek64(fd
, (sb
->data_offset
) * 512, 0) < 0LL) {
1633 pr_err("cannot seek to offset of the meta block\n");
1637 if (awrite(&afd
, mb
, META_BLOCK_SIZE
) != META_BLOCK_SIZE
) {
1638 pr_err("failed to store write the meta block \n");
1652 static int write_init_super1(struct supertype
*st
)
1654 struct mdp_superblock_1
*sb
= st
->sb
;
1655 struct supertype
*refst
;
1658 unsigned long long bm_space
;
1660 unsigned long long dsize
, array_size
;
1661 unsigned long long sb_offset
;
1662 unsigned long long data_offset
;
1664 for (di
= st
->info
; di
; di
= di
->next
) {
1665 if (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))
1666 sb
->feature_map
|= MD_FEATURE_JOURNAL
;
1669 for (di
= st
->info
; di
; di
= di
->next
) {
1670 if (di
->disk
.state
& (1 << MD_DISK_FAULTY
))
1675 while (Kill(di
->devname
, NULL
, 0, -1, 1) == 0)
1678 sb
->dev_number
= __cpu_to_le32(di
->disk
.number
);
1679 if (di
->disk
.state
& (1<<MD_DISK_WRITEMOSTLY
))
1680 sb
->devflags
|= WriteMostly1
;
1682 sb
->devflags
&= ~WriteMostly1
;
1684 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1685 read(rfd
, sb
->device_uuid
, 16) != 16) {
1686 __u32 r
[4] = {random(), random(), random(), random()};
1687 memcpy(sb
->device_uuid
, r
, 16);
1694 refst
= dup_super(st
);
1695 if (load_super1(refst
, di
->fd
, NULL
)==0) {
1696 struct mdp_superblock_1
*refsb
= refst
->sb
;
1698 memcpy(sb
->device_uuid
, refsb
->device_uuid
, 16);
1699 if (memcmp(sb
->set_uuid
, refsb
->set_uuid
, 16)==0) {
1700 /* same array, so preserve events and
1702 sb
->events
= refsb
->events
;
1703 /* bugs in 2.6.17 and earlier mean the
1704 * dev_number chosen in Manage must be preserved
1706 if (get_linux_version() >= 2006018)
1707 sb
->dev_number
= refsb
->dev_number
;
1713 if (!get_dev_size(di
->fd
, NULL
, &dsize
)) {
1726 * Calculate the position of the superblock.
1727 * It is always aligned to a 4K boundary and
1728 * depending on minor_version, it can be:
1729 * 0: At least 8K, but less than 12K, from end of device
1730 * 1: At start of device
1731 * 2: 4K from start of device.
1732 * data_offset has already been set.
1734 array_size
= __le64_to_cpu(sb
->size
);
1735 /* work out how much space we left for a bitmap,
1736 * Add 8 sectors for bad block log */
1737 bm_space
= choose_bm_space(array_size
) + 8;
1739 data_offset
= di
->data_offset
;
1740 if (data_offset
== INVALID_SECTORS
)
1741 data_offset
= st
->data_offset
;
1742 switch(st
->minor_version
) {
1744 if (data_offset
== INVALID_SECTORS
)
1748 sb_offset
&= ~(4*2-1);
1749 sb
->data_offset
= __cpu_to_le64(data_offset
);
1750 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1751 if (sb_offset
< array_size
+ bm_space
)
1752 bm_space
= sb_offset
- array_size
;
1753 sb
->data_size
= __cpu_to_le64(sb_offset
- bm_space
);
1754 if (bm_space
>= 8) {
1755 sb
->bblog_size
= __cpu_to_le16(8);
1756 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1760 sb
->super_offset
= __cpu_to_le64(0);
1761 if (data_offset
== INVALID_SECTORS
)
1764 sb
->data_offset
= __cpu_to_le64(data_offset
);
1765 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
1766 if (data_offset
>= 8 + 32*2 + 8) {
1767 sb
->bblog_size
= __cpu_to_le16(8);
1768 sb
->bblog_offset
= __cpu_to_le32(8 + 32*2);
1769 } else if (data_offset
>= 16) {
1770 sb
->bblog_size
= __cpu_to_le16(8);
1771 sb
->bblog_offset
= __cpu_to_le32(data_offset
-8);
1776 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1777 if (data_offset
== INVALID_SECTORS
)
1780 sb
->data_offset
= __cpu_to_le64(data_offset
);
1781 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
1782 if (data_offset
>= 16 + 32*2 + 8) {
1783 sb
->bblog_size
= __cpu_to_le16(8);
1784 sb
->bblog_offset
= __cpu_to_le32(8 + 32*2);
1785 } else if (data_offset
>= 16+16) {
1786 sb
->bblog_size
= __cpu_to_le16(8);
1787 /* '8' sectors for the bblog, and another '8'
1788 * because we want offset from superblock, not
1791 sb
->bblog_offset
= __cpu_to_le32(data_offset
-8-8);
1795 pr_err("Failed to write invalid metadata format 1.%i to %s\n",
1796 st
->minor_version
, di
->devname
);
1800 /* Disable badblock log on clusters, or when explicitly requested */
1801 if (st
->nodes
> 0 || conf_get_create_info()->bblist
== 0) {
1803 sb
->bblog_offset
= 0;
1806 sb
->sb_csum
= calc_sb_1_csum(sb
);
1807 rv
= store_super1(st
, di
->fd
);
1809 if (rv
== 0 && (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))) {
1810 rv
= write_empty_r5l_meta_block(st
, di
->fd
);
1815 if (rv
== 0 && (__le32_to_cpu(sb
->feature_map
) & 1))
1816 rv
= st
->ss
->write_bitmap(st
, di
->fd
, NoUpdate
);
1824 pr_err("Failed to write metadata to %s\n",
1831 static int compare_super1(struct supertype
*st
, struct supertype
*tst
)
1835 * 0 same, or first was empty, and second was copied
1836 * 1 second had wrong number
1838 * 3 wrong other info
1840 struct mdp_superblock_1
*first
= st
->sb
;
1841 struct mdp_superblock_1
*second
= tst
->sb
;
1843 if (second
->magic
!= __cpu_to_le32(MD_SB_MAGIC
))
1845 if (second
->major_version
!= __cpu_to_le32(1))
1849 if (posix_memalign((void**)&first
, 4096, SUPER1_SIZE
) != 0) {
1850 pr_err("could not allocate superblock\n");
1853 memcpy(first
, second
, SUPER1_SIZE
);
1857 if (memcmp(first
->set_uuid
, second
->set_uuid
, 16)!= 0)
1860 if (first
->ctime
!= second
->ctime
||
1861 first
->level
!= second
->level
||
1862 first
->layout
!= second
->layout
||
1863 first
->size
!= second
->size
||
1864 first
->chunksize
!= second
->chunksize
||
1865 first
->raid_disks
!= second
->raid_disks
)
1870 static int load_super1(struct supertype
*st
, int fd
, char *devname
)
1872 unsigned long long dsize
;
1873 unsigned long long sb_offset
;
1874 struct mdp_superblock_1
*super
;
1876 struct bitmap_super_s
*bsb
;
1877 struct misc_dev_info
*misc
;
1878 struct align_fd afd
;
1884 if (st
->ss
== NULL
|| st
->minor_version
== -1) {
1886 struct supertype tst
;
1887 __u64 bestctime
= 0;
1888 /* guess... choose latest ctime */
1889 memset(&tst
, 0, sizeof(tst
));
1891 for (tst
.minor_version
= 0; tst
.minor_version
<= 2 ; tst
.minor_version
++) {
1892 switch(load_super1(&tst
, fd
, devname
)) {
1893 case 0: super
= tst
.sb
;
1894 if (bestvers
== -1 ||
1895 bestctime
< __le64_to_cpu(super
->ctime
)) {
1896 bestvers
= tst
.minor_version
;
1897 bestctime
= __le64_to_cpu(super
->ctime
);
1902 case 1: return 1; /*bad device */
1903 case 2: break; /* bad, try next */
1906 if (bestvers
!= -1) {
1908 tst
.minor_version
= bestvers
;
1910 tst
.max_devs
= MAX_DEVS
;
1911 rv
= load_super1(&tst
, fd
, devname
);
1918 if (!get_dev_size(fd
, devname
, &dsize
))
1924 pr_err("%s is too small for md: size is %llu sectors.\n",
1930 * Calculate the position of the superblock.
1931 * It is always aligned to a 4K boundary and
1932 * depending on minor_version, it can be:
1933 * 0: At least 8K, but less than 12K, from end of device
1934 * 1: At start of device
1935 * 2: 4K from start of device.
1937 switch(st
->minor_version
) {
1941 sb_offset
&= ~(4*2-1);
1953 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL) {
1955 pr_err("Cannot seek to superblock on %s: %s\n",
1956 devname
, strerror(errno
));
1960 if (posix_memalign((void**)&super
, 4096, SUPER1_SIZE
) != 0) {
1961 pr_err("could not allocate superblock\n");
1965 if (aread(&afd
, super
, MAX_SB_SIZE
) != MAX_SB_SIZE
) {
1967 pr_err("Cannot read superblock on %s\n",
1973 if (__le32_to_cpu(super
->magic
) != MD_SB_MAGIC
) {
1975 pr_err("No super block found on %s (Expected magic %08x, got %08x)\n",
1976 devname
, MD_SB_MAGIC
, __le32_to_cpu(super
->magic
));
1981 if (__le32_to_cpu(super
->major_version
) != 1) {
1983 pr_err("Cannot interpret superblock on %s - version is %d\n",
1984 devname
, __le32_to_cpu(super
->major_version
));
1988 if (__le64_to_cpu(super
->super_offset
) != sb_offset
) {
1990 pr_err("No superblock found on %s (super_offset is wrong)\n",
1997 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
1999 misc
= (struct misc_dev_info
*) (((char*)super
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
2000 misc
->device_size
= dsize
;
2001 if (st
->data_offset
== INVALID_SECTORS
)
2002 st
->data_offset
= __le64_to_cpu(super
->data_offset
);
2004 /* Now check on the bitmap superblock */
2005 if ((__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) == 0)
2007 /* Read the bitmap superblock and make sure it looks
2008 * valid. If it doesn't clear the bit. An --assemble --force
2009 * should get that written out.
2011 locate_bitmap1(st
, fd
);
2012 if (aread(&afd
, bsb
, 512) != 512)
2015 uuid_from_super1(st
, uuid
);
2016 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
2017 memcmp(bsb
->uuid
, uuid
, 16) != 0)
2022 super
->feature_map
= __cpu_to_le32(__le32_to_cpu(super
->feature_map
)
2023 & ~MD_FEATURE_BITMAP_OFFSET
);
2027 static struct supertype
*match_metadata_desc1(char *arg
)
2029 struct supertype
*st
= xcalloc(1, sizeof(*st
));
2031 st
->container_devnm
[0] = 0;
2033 st
->max_devs
= MAX_DEVS
;
2035 st
->data_offset
= INVALID_SECTORS
;
2036 /* leading zeros can be safely ignored. --detail generates them. */
2039 if (strcmp(arg
, "1.0") == 0 ||
2040 strcmp(arg
, "1.00") == 0) {
2041 st
->minor_version
= 0;
2044 if (strcmp(arg
, "1.1") == 0 ||
2045 strcmp(arg
, "1.01") == 0
2047 st
->minor_version
= 1;
2050 if (strcmp(arg
, "1.2") == 0 ||
2051 #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
2052 strcmp(arg
, "default") == 0 ||
2053 #endif /* DEFAULT_OLD_METADATA */
2054 strcmp(arg
, "1.02") == 0) {
2055 st
->minor_version
= 2;
2058 if (strcmp(arg
, "1") == 0 ||
2059 strcmp(arg
, "default") == 0) {
2060 st
->minor_version
= -1;
2068 /* find available size on device with this devsize, using
2069 * superblock type st, and reserving 'reserve' sectors for
2072 static __u64
avail_size1(struct supertype
*st
, __u64 devsize
,
2073 unsigned long long data_offset
)
2075 struct mdp_superblock_1
*super
= st
->sb
;
2082 if (__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
2083 /* hot-add. allow for actual size of bitmap */
2084 struct bitmap_super_s
*bsb
;
2085 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
2086 bmspace
= bitmap_sectors(bsb
);
2089 /* Allow space for bad block log */
2090 if (super
->bblog_size
)
2091 bbspace
= __le16_to_cpu(super
->bblog_size
);
2093 if (st
->minor_version
< 0)
2094 /* not specified, so time to set default */
2095 st
->minor_version
= 2;
2097 if (data_offset
== INVALID_SECTORS
)
2098 data_offset
= st
->data_offset
;
2100 if (data_offset
!= INVALID_SECTORS
)
2101 switch(st
->minor_version
) {
2103 return devsize
- data_offset
- 8*2 - bbspace
;
2106 return devsize
- data_offset
;
2113 switch(st
->minor_version
) {
2116 return ((devsize
- 8*2 - bbspace
) & ~(4*2-1));
2118 /* at start, 4K for superblock and possible bitmap */
2119 return devsize
- 4*2 - bbspace
;
2121 /* 4k from start, 4K for superblock and possible bitmap */
2122 return devsize
- (4+4)*2 - bbspace
;
2128 add_internal_bitmap1(struct supertype
*st
,
2129 int *chunkp
, int delay
, int write_behind
,
2130 unsigned long long size
,
2131 int may_change
, int major
)
2134 * If not may_change, then this is a 'Grow' without sysfs support for
2135 * bitmaps, and the bitmap must fit after the superblock at 1K offset.
2136 * If may_change, then this is create or a Grow with sysfs syupport,
2137 * and we can put the bitmap wherever we like.
2139 * size is in sectors, chunk is in bytes !!!
2142 unsigned long long bits
;
2143 unsigned long long max_bits
;
2144 unsigned long long min_chunk
;
2146 long bbl_offset
, bbl_size
;
2147 unsigned long long chunk
= *chunkp
;
2150 struct mdp_superblock_1
*sb
= st
->sb
;
2151 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
2154 if (__le64_to_cpu(sb
->data_size
) == 0)
2155 /* Must be creating the array, else data_size would be non-zero */
2157 switch(st
->minor_version
) {
2159 /* either 3K after the superblock (when hot-add),
2160 * or some amount of space before.
2163 /* We are creating array, so we *know* how much room has
2168 room
= choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2170 room
= __le64_to_cpu(sb
->super_offset
)
2171 - __le64_to_cpu(sb
->data_offset
)
2172 - __le64_to_cpu(sb
->data_size
);
2173 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2176 bbl_offset
= (__s32
)__le32_to_cpu(sb
->bblog_offset
);
2177 if (bbl_size
< -bbl_offset
)
2178 bbl_size
= -bbl_offset
;
2180 if (!may_change
|| (room
< 3*2 &&
2181 __le32_to_cpu(sb
->max_dev
) <= 384)) {
2186 offset
= 0; /* means movable offset */
2191 case 2: /* between superblock and data */
2195 room
= choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2197 room
= __le64_to_cpu(sb
->data_offset
)
2198 - __le64_to_cpu(sb
->super_offset
);
2199 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2201 room
= __le32_to_cpu(sb
->bblog_offset
) + bbl_size
;
2206 room
-= 2; /* Leave 1K for superblock */
2210 room
-= 4*2; /* leave 4K for superblock */
2220 if (chunk
== UnSet
&& room
> 128*2)
2221 /* Limit to 128K of bitmap when chunk size not requested */
2225 /* No room for a bitmap */
2228 max_bits
= (room
* 512 - sizeof(bitmap_super_t
)) * 8;
2230 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
2231 bits
= (size
*512)/min_chunk
+1;
2232 while (bits
> max_bits
) {
2236 if (chunk
== UnSet
) {
2237 /* For practical purpose, 64Meg is a good
2238 * default chunk size for internal bitmaps.
2241 if (chunk
< 64*1024*1024)
2242 chunk
= 64*1024*1024;
2243 } else if (chunk
< min_chunk
)
2244 return 0; /* chunk size too small */
2245 if (chunk
== 0) /* rounding problem */
2249 /* start bitmap on a 4K boundary with enough space for
2252 bits
= (size
*512) / chunk
+ 1;
2253 room
= ((bits
+7)/8 + sizeof(bitmap_super_t
) +4095)/4096;
2254 room
*= 8; /* convert 4K blocks to sectors */
2255 offset
= -room
- bbl_size
;
2258 sb
->bitmap_offset
= (int32_t)__cpu_to_le32(offset
);
2260 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
)
2261 | MD_FEATURE_BITMAP_OFFSET
);
2262 memset(bms
, 0, sizeof(*bms
));
2263 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
2264 bms
->version
= __cpu_to_le32(major
);
2265 uuid_from_super1(st
, uuid
);
2266 memcpy(bms
->uuid
, uuid
, 16);
2267 bms
->chunksize
= __cpu_to_le32(chunk
);
2268 bms
->daemon_sleep
= __cpu_to_le32(delay
);
2269 bms
->sync_size
= __cpu_to_le64(size
);
2270 bms
->write_behind
= __cpu_to_le32(write_behind
);
2271 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2273 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
)
2274 | MD_FEATURE_BITMAP_VERSIONED
);
2275 if (st
->cluster_name
)
2276 strncpy((char *)bms
->cluster_name
,
2277 st
->cluster_name
, strlen(st
->cluster_name
));
2283 static void locate_bitmap1(struct supertype
*st
, int fd
)
2285 unsigned long long offset
;
2286 struct mdp_superblock_1
*sb
;
2290 if (st
->ss
->load_super(st
, fd
, NULL
))
2291 return; /* no error I hope... */
2296 offset
= __le64_to_cpu(sb
->super_offset
);
2297 offset
+= (int32_t) __le32_to_cpu(sb
->bitmap_offset
);
2300 lseek64(fd
, offset
<<9, 0);
2303 static int write_bitmap1(struct supertype
*st
, int fd
, enum bitmap_update update
)
2305 struct mdp_superblock_1
*sb
= st
->sb
;
2306 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+MAX_SB_SIZE
);
2310 struct align_fd afd
;
2312 unsigned long long total_bm_space
, bm_space_per_node
;
2316 /* update cluster name */
2317 if (st
->cluster_name
) {
2318 memset((char *)bms
->cluster_name
, 0, sizeof(bms
->cluster_name
));
2319 strncpy((char *)bms
->cluster_name
, st
->cluster_name
, 64);
2323 /* cluster md only supports superblock 1.2 now */
2324 if (st
->minor_version
!= 2) {
2325 pr_err("Warning: cluster md only works with superblock 1.2\n");
2329 /* Each node has an independent bitmap, it is necessary to calculate the
2330 * space is enough or not, first get how many bytes for the total bitmap */
2331 bm_space_per_node
= calc_bitmap_size(bms
, 4096);
2333 total_bm_space
= 512 * (__le64_to_cpu(sb
->data_offset
) - __le64_to_cpu(sb
->super_offset
));
2334 total_bm_space
= total_bm_space
- 4096; /* leave another 4k for superblock */
2336 if (bm_space_per_node
* st
->nodes
> total_bm_space
) {
2337 pr_err("Warning: The max num of nodes can't exceed %llu\n",
2338 total_bm_space
/ bm_space_per_node
);
2342 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2351 locate_bitmap1(st
, fd
);
2353 if (posix_memalign(&buf
, 4096, 4096))
2357 /* Only the bitmap[0] should resync
2358 * whole device on initial assembly
2361 memset(buf
, 0x00, 4096);
2363 memset(buf
, 0xff, 4096);
2364 memcpy(buf
, (char *)bms
, sizeof(bitmap_super_t
));
2366 towrite
= calc_bitmap_size(bms
, 4096);
2367 while (towrite
> 0) {
2371 n
= awrite(&afd
, buf
, n
);
2377 memset(buf
, 0x00, 4096);
2379 memset(buf
, 0xff, 4096);
2386 } while (++i
< __le32_to_cpu(bms
->nodes
));
2392 static void free_super1(struct supertype
*st
)
2397 struct devinfo
*di
= st
->info
;
2398 st
->info
= di
->next
;
2407 static int validate_geometry1(struct supertype
*st
, int level
,
2408 int layout
, int raiddisks
,
2409 int *chunk
, unsigned long long size
,
2410 unsigned long long data_offset
,
2411 char *subdev
, unsigned long long *freesize
,
2414 unsigned long long ldsize
, devsize
;
2416 unsigned long long headroom
;
2419 if (level
== LEVEL_CONTAINER
) {
2421 pr_err("1.x metadata does not support containers\n");
2424 if (*chunk
== UnSet
)
2425 *chunk
= DEFAULT_CHUNK
;
2430 if (st
->minor_version
< 0)
2431 /* not specified, so time to set default */
2432 st
->minor_version
= 2;
2434 fd
= open(subdev
, O_RDONLY
|O_EXCL
, 0);
2437 pr_err("super1.x cannot open %s: %s\n",
2438 subdev
, strerror(errno
));
2442 if (!get_dev_size(fd
, subdev
, &ldsize
)) {
2448 devsize
= ldsize
>> 9;
2454 /* creating: allow suitable space for bitmap */
2455 bmspace
= choose_bm_space(devsize
);
2457 if (data_offset
== INVALID_SECTORS
)
2458 data_offset
= st
->data_offset
;
2459 if (data_offset
== INVALID_SECTORS
)
2460 switch (st
->minor_version
) {
2466 /* Choose data offset appropriate for this device
2467 * and use as default for whole array.
2468 * The data_offset must allow for bitmap space
2469 * and base metadata, should allow for some headroom
2470 * for reshape, and should be rounded to multiple
2472 * Headroom is limited to 128M, but aim for about 0.1%
2474 headroom
= 128*1024*2;
2475 while ((headroom
<< 10) > devsize
&&
2477 headroom
/ 2 >= ((unsigned)(*chunk
)*2)*2))
2479 data_offset
= 12*2 + bmspace
+ headroom
;
2480 #define ONE_MEG (2*1024)
2481 if (data_offset
> ONE_MEG
)
2482 data_offset
= (data_offset
/ ONE_MEG
) * ONE_MEG
;
2485 if (st
->data_offset
== INVALID_SECTORS
)
2486 st
->data_offset
= data_offset
;
2487 switch(st
->minor_version
) {
2488 case 0: /* metadata at end. Round down and subtract space to reserve */
2489 devsize
= (devsize
& ~(4ULL*2-1));
2490 /* space for metadata, bblog, bitmap */
2491 devsize
-= 8*2 + 8 + bmspace
;
2495 devsize
-= data_offset
;
2498 *freesize
= devsize
;
2501 #endif /* MDASSEMBLE */
2503 void *super1_make_v0(struct supertype
*st
, struct mdinfo
*info
, mdp_super_t
*sb0
)
2505 /* Create a v1.0 superblock based on 'info'*/
2507 struct mdp_superblock_1
*sb
;
2510 unsigned long long offset
;
2512 if (posix_memalign(&ret
, 4096, 1024) != 0)
2515 memset(ret
, 0, 1024);
2516 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
2517 sb
->major_version
= __cpu_to_le32(1);
2519 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
2520 sprintf(sb
->set_name
, "%d", sb0
->md_minor
);
2521 sb
->ctime
= __cpu_to_le32(info
->array
.ctime
+1);
2522 sb
->level
= __cpu_to_le32(info
->array
.level
);
2523 sb
->layout
= __cpu_to_le32(info
->array
.layout
);
2524 sb
->size
= __cpu_to_le64(info
->component_size
);
2525 sb
->chunksize
= __cpu_to_le32(info
->array
.chunk_size
/512);
2526 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
2527 if (info
->array
.level
> 0)
2528 sb
->data_size
= sb
->size
;
2530 sb
->data_size
= st
->ss
->avail_size(st
, st
->devsize
/512, 0);
2531 sb
->resync_offset
= MaxSector
;
2532 sb
->max_dev
= __cpu_to_le32(MD_SB_DISKS
);
2533 sb
->dev_number
= __cpu_to_le32(info
->disk
.number
);
2534 sb
->utime
= __cpu_to_le64(info
->array
.utime
);
2536 offset
= st
->devsize
/512 - 8*2;
2538 sb
->super_offset
= __cpu_to_le64(offset
);
2539 //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset);
2541 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
2542 read(rfd
, sb
->device_uuid
, 16) != 16) {
2543 __u32 r
[4] = {random(), random(), random(), random()};
2544 memcpy(sb
->device_uuid
, r
, 16);
2549 for (i
= 0; i
< MD_SB_DISKS
; i
++) {
2550 int state
= sb0
->disks
[i
].state
;
2551 sb
->dev_roles
[i
] = MD_DISK_ROLE_SPARE
;
2552 if ((state
& (1<<MD_DISK_SYNC
)) &&
2553 !(state
& (1<<MD_DISK_FAULTY
)))
2554 sb
->dev_roles
[i
] = __cpu_to_le16(sb0
->disks
[i
].raid_disk
);
2556 sb
->sb_csum
= calc_sb_1_csum(sb
);
2560 struct superswitch super1
= {
2562 .examine_super
= examine_super1
,
2563 .brief_examine_super
= brief_examine_super1
,
2564 .export_examine_super
= export_examine_super1
,
2565 .detail_super
= detail_super1
,
2566 .brief_detail_super
= brief_detail_super1
,
2567 .export_detail_super
= export_detail_super1
,
2568 .write_init_super
= write_init_super1
,
2569 .validate_geometry
= validate_geometry1
,
2570 .add_to_super
= add_to_super1
,
2571 .examine_badblocks
= examine_badblocks_super1
,
2572 .copy_metadata
= copy_metadata1
,
2574 .match_home
= match_home1
,
2575 .uuid_from_super
= uuid_from_super1
,
2576 .getinfo_super
= getinfo_super1
,
2577 .container_content
= container_content1
,
2578 .update_super
= update_super1
,
2579 .init_super
= init_super1
,
2580 .store_super
= store_super1
,
2581 .compare_super
= compare_super1
,
2582 .load_super
= load_super1
,
2583 .match_metadata_desc
= match_metadata_desc1
,
2584 .avail_size
= avail_size1
,
2585 .add_internal_bitmap
= add_internal_bitmap1
,
2586 .locate_bitmap
= locate_bitmap1
,
2587 .write_bitmap
= write_bitmap1
,
2588 .free_super
= free_super1
,
2589 .require_journal
= require_journal1
,
2590 #if __BYTE_ORDER == BIG_ENDIAN