2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2016 Neil Brown <neilb@suse.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Email: <neilb@suse.de>
28 * The version-1 superblock :
29 * All numeric fields are little-endian.
31 * total size: 256 bytes plus 2 per device.
32 * 1K allows 384 devices.
34 struct mdp_superblock_1
{
35 /* constant array information - 128 bytes */
36 __u32 magic
; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
37 __u32 major_version
; /* 1 */
38 __u32 feature_map
; /* 0 for now */
39 __u32 pad0
; /* always set to 0 when writing */
41 __u8 set_uuid
[16]; /* user-space generated. */
42 char set_name
[32]; /* set and interpreted by user-space */
44 __u64 ctime
; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
45 __u32 level
; /* -4 (multipath), -1 (linear), 0,1,4,5 */
46 __u32 layout
; /* 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 \
145 static int role_from_sb(struct mdp_superblock_1
*sb
)
150 d
= __le32_to_cpu(sb
->dev_number
);
151 if (d
< __le32_to_cpu(sb
->max_dev
))
152 role
= __le16_to_cpu(sb
->dev_roles
[d
]);
154 role
= MD_DISK_ROLE_SPARE
;
159 /* return how many bytes are needed for bitmap, for cluster-md each node
160 * should have it's own bitmap */
161 static unsigned int calc_bitmap_size(bitmap_super_t
*bms
, unsigned int boundary
)
163 unsigned long long bits
, bytes
;
165 bits
= __le64_to_cpu(bms
->sync_size
) / (__le32_to_cpu(bms
->chunksize
)>>9);
166 bytes
= (bits
+7) >> 3;
167 bytes
+= sizeof(bitmap_super_t
);
168 bytes
= ROUND_UP(bytes
, boundary
);
173 static unsigned int calc_sb_1_csum(struct mdp_superblock_1
* sb
)
175 unsigned int disk_csum
, csum
;
176 unsigned long long newcsum
;
177 int size
= sizeof(*sb
) + __le32_to_cpu(sb
->max_dev
)*2;
178 unsigned int *isuper
= (unsigned int*)sb
;
180 /* make sure I can count... */
181 if (offsetof(struct mdp_superblock_1
,data_offset
) != 128 ||
182 offsetof(struct mdp_superblock_1
, utime
) != 192 ||
183 sizeof(struct mdp_superblock_1
) != 256) {
184 fprintf(stderr
, "WARNING - superblock isn't sized correctly\n");
187 disk_csum
= sb
->sb_csum
;
190 for (; size
>=4; size
-= 4 ) {
191 newcsum
+= __le32_to_cpu(*isuper
);
196 newcsum
+= __le16_to_cpu(*(unsigned short*) isuper
);
198 csum
= (newcsum
& 0xffffffff) + (newcsum
>> 32);
199 sb
->sb_csum
= disk_csum
;
200 return __cpu_to_le32(csum
);
204 * Information related to file descriptor used for aligned reads/writes.
205 * Cache the block size.
212 static void init_afd(struct align_fd
*afd
, int fd
)
216 if (ioctl(afd
->fd
, BLKSSZGET
, &afd
->blk_sz
) != 0)
220 static char abuf
[4096+4096];
221 static int aread(struct align_fd
*afd
, void *buf
, int len
)
224 * On devices with a 4K sector size, we need to read
225 * the full sector and copy relevant bits into
234 if (!bsize
|| bsize
> 4096 || len
> 4096) {
236 fprintf(stderr
, "WARNING - aread() called with invalid block size\n");
239 b
= ROUND_UP_PTR((char *)abuf
, 4096);
241 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
243 n
= read(afd
->fd
, b
, iosize
);
246 lseek(afd
->fd
, len
- n
, 1);
253 static int awrite(struct align_fd
*afd
, void *buf
, int len
)
256 * On devices with a 4K sector size, we need to write
257 * the full sector. We pre-read if the sector is larger
259 * The address must be sector-aligned.
266 if (!bsize
|| bsize
> 4096 || len
> 4096) {
268 fprintf(stderr
, "WARNING - awrite() called with invalid block size\n");
271 b
= ROUND_UP_PTR((char *)abuf
, 4096);
273 for (iosize
= 0; iosize
< len
; iosize
+= bsize
)
277 n
= read(afd
->fd
, b
, iosize
);
280 lseek(afd
->fd
, -n
, 1);
284 n
= write(afd
->fd
, b
, iosize
);
287 lseek(afd
->fd
, len
- n
, 1);
292 static void examine_super1(struct supertype
*st
, char *homehost
)
294 struct mdp_superblock_1
*sb
= st
->sb
;
295 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+MAX_SB_SIZE
);
302 int l
= homehost
? strlen(homehost
) : 0;
304 unsigned long long sb_offset
;
307 printf(" Magic : %08x\n", __le32_to_cpu(sb
->magic
));
308 printf(" Version : 1");
309 sb_offset
= __le64_to_cpu(sb
->super_offset
);
312 else if (sb_offset
<= 8)
316 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb
->feature_map
));
317 printf(" Array UUID : ");
318 for (i
=0; i
<16; i
++) {
319 if ((i
&3)==0 && i
!= 0) printf(":");
320 printf("%02x", sb
->set_uuid
[i
]);
323 printf(" Name : %.32s", sb
->set_name
);
324 if (l
> 0 && l
< 32 &&
325 sb
->set_name
[l
] == ':' &&
326 strncmp(sb
->set_name
, homehost
, l
) == 0)
327 printf(" (local to host %s)", homehost
);
329 if (bms
->nodes
> 0 && (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
))
330 printf(" Cluster Name : %-64s\n", bms
->cluster_name
);
331 atime
= __le64_to_cpu(sb
->ctime
) & 0xFFFFFFFFFFULL
;
332 printf(" Creation Time : %.24s\n", ctime(&atime
));
333 c
=map_num(pers
, __le32_to_cpu(sb
->level
));
334 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
335 printf(" Raid Devices : %d\n", __le32_to_cpu(sb
->raid_disks
));
337 printf(" Avail Dev Size : %llu%s\n",
338 (unsigned long long)__le64_to_cpu(sb
->data_size
),
339 human_size(__le64_to_cpu(sb
->data_size
)<<9));
340 if (__le32_to_cpu(sb
->level
) > 0) {
341 int ddsks
= 0, ddsks_denom
= 1;
342 switch(__le32_to_cpu(sb
->level
)) {
343 case 1: ddsks
=1;break;
345 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
346 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
348 layout
= __le32_to_cpu(sb
->layout
);
349 ddsks
= __le32_to_cpu(sb
->raid_disks
);
350 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
353 long long asize
= __le64_to_cpu(sb
->size
);
354 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
355 printf(" Array Size : %llu%s\n",
356 asize
>> 10, human_size(asize
));
358 if (sb
->size
!= sb
->data_size
)
359 printf(" Used Dev Size : %llu%s\n",
360 (unsigned long long)__le64_to_cpu(sb
->size
),
361 human_size(__le64_to_cpu(sb
->size
)<<9));
364 printf(" Data Offset : %llu sectors\n",
365 (unsigned long long)__le64_to_cpu(sb
->data_offset
));
366 if (sb
->new_offset
&&
367 (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
)) {
368 unsigned long long offset
= __le64_to_cpu(sb
->data_offset
);
369 offset
+= (signed)(int32_t)__le32_to_cpu(sb
->new_offset
);
370 printf(" New Offset : %llu sectors\n", offset
);
372 printf(" Super Offset : %llu sectors\n",
373 (unsigned long long)__le64_to_cpu(sb
->super_offset
));
374 if (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_RECOVERY_OFFSET
)
375 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb
->recovery_offset
));
377 st
->ss
->getinfo_super(st
, &info
, NULL
);
378 if (info
.space_after
!= 1 &&
379 !(__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_NEW_OFFSET
))
380 printf(" Unused Space : before=%llu sectors, after=%llu sectors\n",
381 info
.space_before
, info
.space_after
);
383 printf(" State : %s\n", (__le64_to_cpu(sb
->resync_offset
)+1)? "active":"clean");
384 printf(" Device UUID : ");
385 for (i
=0; i
<16; i
++) {
386 if ((i
&3)==0 && i
!= 0) printf(":");
387 printf("%02x", sb
->device_uuid
[i
]);
391 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
392 printf("Internal Bitmap : %ld sectors from superblock\n",
393 (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
));
395 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)) {
396 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb
->reshape_position
)/2,
397 human_size(__le64_to_cpu(sb
->reshape_position
)<<9));
398 if (__le32_to_cpu(sb
->delta_disks
)) {
399 printf(" Delta Devices : %d", __le32_to_cpu(sb
->delta_disks
));
400 printf(" (%d->%d)\n",
401 __le32_to_cpu(sb
->raid_disks
)-__le32_to_cpu(sb
->delta_disks
),
402 __le32_to_cpu(sb
->raid_disks
));
403 if ((int)__le32_to_cpu(sb
->delta_disks
) < 0)
404 delta_extra
= -__le32_to_cpu(sb
->delta_disks
);
406 if (__le32_to_cpu(sb
->new_level
) != __le32_to_cpu(sb
->level
)) {
407 c
= map_num(pers
, __le32_to_cpu(sb
->new_level
));
408 printf(" New Level : %s\n", c
?c
:"-unknown-");
410 if (__le32_to_cpu(sb
->new_layout
) != __le32_to_cpu(sb
->layout
)) {
411 if (__le32_to_cpu(sb
->level
) == 5) {
412 c
= map_num(r5layout
, __le32_to_cpu(sb
->new_layout
));
413 printf(" New Layout : %s\n", c
?c
:"-unknown-");
415 if (__le32_to_cpu(sb
->level
) == 6) {
416 c
= map_num(r6layout
, __le32_to_cpu(sb
->new_layout
));
417 printf(" New Layout : %s\n", c
?c
:"-unknown-");
419 if (__le32_to_cpu(sb
->level
) == 10) {
420 printf(" New Layout :");
421 print_r10_layout(__le32_to_cpu(sb
->new_layout
));
425 if (__le32_to_cpu(sb
->new_chunk
) != __le32_to_cpu(sb
->chunksize
))
426 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb
->new_chunk
)/2);
431 if (sb
->devflags
& WriteMostly1
)
432 printf(" write-mostly");
436 atime
= __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
;
437 printf(" Update Time : %.24s\n", ctime(&atime
));
439 if (sb
->bblog_size
&& sb
->bblog_offset
) {
440 printf(" Bad Block Log : %d entries available at offset %ld sectors",
441 __le16_to_cpu(sb
->bblog_size
)*512/8,
442 (long)(int32_t)__le32_to_cpu(sb
->bblog_offset
));
443 if (sb
->feature_map
&
444 __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
445 printf(" - bad blocks present.");
449 if (calc_sb_1_csum(sb
) == sb
->sb_csum
)
450 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb
->sb_csum
));
452 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb
->sb_csum
),
453 __le32_to_cpu(calc_sb_1_csum(sb
)));
454 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb
->events
));
456 if (__le32_to_cpu(sb
->level
) == 5) {
457 c
= map_num(r5layout
, __le32_to_cpu(sb
->layout
));
458 printf(" Layout : %s\n", c
?c
:"-unknown-");
460 if (__le32_to_cpu(sb
->level
) == 6) {
461 c
= map_num(r6layout
, __le32_to_cpu(sb
->layout
));
462 printf(" Layout : %s\n", c
?c
:"-unknown-");
464 if (__le32_to_cpu(sb
->level
) == 10) {
465 int lo
= __le32_to_cpu(sb
->layout
);
467 print_r10_layout(lo
);
470 switch(__le32_to_cpu(sb
->level
)) {
476 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
479 printf(" Rounding : %dK\n", __le32_to_cpu(sb
->chunksize
)/2);
485 /* This turns out to just be confusing */
486 printf(" Array Slot : %d (", __le32_to_cpu(sb
->dev_number
));
487 for (i
= __le32_to_cpu(sb
->max_dev
); i
> 0 ; i
--)
488 if (__le16_to_cpu(sb
->dev_roles
[i
-1]) != MD_DISK_ROLE_SPARE
)
490 for (d
=0; d
< i
; d
++) {
491 int role
= __le16_to_cpu(sb
->dev_roles
[d
]);
493 if (role
== MD_DISK_ROLE_SPARE
) printf("empty");
494 else if(role
== MD_DISK_ROLE_FAULTY
) printf("failed");
495 else printf("%d", role
);
499 printf(" Device Role : ");
500 role
= role_from_sb(sb
);
501 if (role
>= MD_DISK_ROLE_FAULTY
)
503 else if (role
== MD_DISK_ROLE_JOURNAL
)
505 else if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_REPLACEMENT
))
506 printf("Replacement device %d\n", role
);
508 printf("Active device %d\n", role
);
510 printf(" Array State : ");
511 for (d
=0; d
<__le32_to_cpu(sb
->raid_disks
) + delta_extra
; d
++) {
514 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
515 unsigned int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
529 /* This is confusing too */
531 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
532 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
533 if (role
== MD_DISK_ROLE_FAULTY
)
536 if (faulty
) printf(" %d failed", faulty
);
538 printf(" ('A' == active, '.' == missing, 'R' == replacing)");
542 static void brief_examine_super1(struct supertype
*st
, int verbose
)
544 struct mdp_superblock_1
*sb
= st
->sb
;
546 unsigned long long sb_offset
;
548 char *c
=map_num(pers
, __le32_to_cpu(sb
->level
));
550 nm
= strchr(sb
->set_name
, ':');
553 else if (sb
->set_name
[0])
565 printf(" level=%s", c
);
566 sb_offset
= __le64_to_cpu(sb
->super_offset
);
568 printf(" metadata=1.1 ");
569 else if (sb_offset
<= 8)
570 printf(" metadata=1.2 ");
572 printf(" metadata=1.0 ");
574 printf("num-devices=%d ", __le32_to_cpu(sb
->raid_disks
));
576 for (i
=0; i
<16; i
++) {
577 if ((i
&3)==0 && i
!= 0) printf(":");
578 printf("%02x", sb
->set_uuid
[i
]);
580 if (sb
->set_name
[0]) {
582 print_quoted(sb
->set_name
);
587 static void export_examine_super1(struct supertype
*st
)
589 struct mdp_superblock_1
*sb
= st
->sb
;
594 printf("MD_LEVEL=%s\n", map_num(pers
, __le32_to_cpu(sb
->level
)));
595 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb
->raid_disks
));
597 if (sb
->set_name
[i
] == '\n' ||
598 sb
->set_name
[i
] == '\0') {
603 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
604 if (__le32_to_cpu(sb
->level
) > 0) {
605 int ddsks
= 0, ddsks_denom
= 1;
606 switch(__le32_to_cpu(sb
->level
)) {
607 case 1: ddsks
=1;break;
609 case 5: ddsks
= __le32_to_cpu(sb
->raid_disks
)-1; break;
610 case 6: ddsks
= __le32_to_cpu(sb
->raid_disks
)-2; break;
612 layout
= __le32_to_cpu(sb
->layout
);
613 ddsks
= __le32_to_cpu(sb
->raid_disks
);
614 ddsks_denom
= (layout
&255) * ((layout
>>8)&255);
617 long long asize
= __le64_to_cpu(sb
->size
);
618 asize
= (asize
<< 9) * ddsks
/ ddsks_denom
;
619 printf("MD_ARRAY_SIZE=%s\n",human_size_brief(asize
,JEDEC
));
623 for (i
=0; i
<16; i
++) {
624 if ((i
&3)==0 && i
!= 0) printf(":");
625 printf("%02x", sb
->set_uuid
[i
]);
628 printf("MD_UPDATE_TIME=%llu\n",
629 __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
);
630 printf("MD_DEV_UUID=");
631 for (i
=0; i
<16; i
++) {
632 if ((i
&3)==0 && i
!= 0) printf(":");
633 printf("%02x", sb
->device_uuid
[i
]);
636 printf("MD_EVENTS=%llu\n",
637 (unsigned long long)__le64_to_cpu(sb
->events
));
640 static int copy_metadata1(struct supertype
*st
, int from
, int to
)
642 /* Read superblock. If it looks good, write it out.
643 * Then if a bitmap is present, copy that.
644 * And if a bad-block-list is present, copy that too.
647 unsigned long long dsize
, sb_offset
;
648 const int bufsize
= 4*1024;
649 struct mdp_superblock_1 super
, *sb
;
651 if (posix_memalign(&buf
, 4096, bufsize
) != 0)
654 if (!get_dev_size(from
, NULL
, &dsize
))
660 switch(st
->minor_version
) {
664 sb_offset
&= ~(4*2-1);
676 if (lseek64(from
, sb_offset
<< 9, 0) < 0LL)
678 if (read(from
, buf
, bufsize
) != bufsize
)
682 super
= *sb
; // save most of sb for when we reuse buf
684 if (__le32_to_cpu(super
.magic
) != MD_SB_MAGIC
||
685 __le32_to_cpu(super
.major_version
) != 1 ||
686 __le64_to_cpu(super
.super_offset
) != sb_offset
||
687 calc_sb_1_csum(sb
) != super
.sb_csum
)
690 if (lseek64(to
, sb_offset
<< 9, 0) < 0LL)
692 if (write(to
, buf
, bufsize
) != bufsize
)
695 if (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
)) {
696 unsigned long long bitmap_offset
= sb_offset
;
697 int bytes
= 4096; // just an estimate.
699 struct align_fd afrom
, ato
;
701 init_afd(&afrom
, from
);
704 bitmap_offset
+= (int32_t)__le32_to_cpu(super
.bitmap_offset
);
706 if (lseek64(from
, bitmap_offset
<<9, 0) < 0)
708 if (lseek64(to
, bitmap_offset
<<9, 0) < 0)
711 for (written
= 0; written
< bytes
; ) {
712 int n
= bytes
- written
;
715 if (aread(&afrom
, buf
, n
) != n
)
718 /* have the header, can calculate
719 * correct bitmap bytes */
722 bytes
= calc_bitmap_size(bms
, 512);
726 if (awrite(&ato
, buf
, n
) != n
)
732 if (super
.bblog_size
!= 0 &&
733 __le16_to_cpu(super
.bblog_size
) <= 100 &&
734 super
.bblog_offset
!= 0 &&
735 (super
.feature_map
& __le32_to_cpu(MD_FEATURE_BAD_BLOCKS
))) {
736 /* There is a bad block log */
737 unsigned long long bb_offset
= sb_offset
;
738 int bytes
= __le16_to_cpu(super
.bblog_size
) * 512;
740 struct align_fd afrom
, ato
;
742 init_afd(&afrom
, from
);
745 bb_offset
+= (int32_t)__le32_to_cpu(super
.bblog_offset
);
747 if (lseek64(from
, bb_offset
<<9, 0) < 0)
749 if (lseek64(to
, bb_offset
<<9, 0) < 0)
752 for (written
= 0; written
< bytes
; ) {
753 int n
= bytes
- written
;
756 if (aread(&afrom
, buf
, n
) != n
)
759 if (awrite(&ato
, buf
, n
) != n
)
773 static void detail_super1(struct supertype
*st
, char *homehost
)
775 struct mdp_superblock_1
*sb
= st
->sb
;
776 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
778 int l
= homehost
? strlen(homehost
) : 0;
780 printf(" Name : %.32s", sb
->set_name
);
781 if (l
> 0 && l
< 32 &&
782 sb
->set_name
[l
] == ':' &&
783 strncmp(sb
->set_name
, homehost
, l
) == 0)
784 printf(" (local to host %s)", homehost
);
785 if (bms
->nodes
> 0 && (__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
))
786 printf("\n Cluster Name : %-64s", bms
->cluster_name
);
787 printf("\n UUID : ");
788 for (i
=0; i
<16; i
++) {
789 if ((i
&3)==0 && i
!= 0) printf(":");
790 printf("%02x", sb
->set_uuid
[i
]);
792 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb
->events
));
795 static void brief_detail_super1(struct supertype
*st
)
797 struct mdp_superblock_1
*sb
= st
->sb
;
800 if (sb
->set_name
[0]) {
802 print_quoted(sb
->set_name
);
805 for (i
=0; i
<16; i
++) {
806 if ((i
&3)==0 && i
!= 0) printf(":");
807 printf("%02x", sb
->set_uuid
[i
]);
811 static void export_detail_super1(struct supertype
*st
)
813 struct mdp_superblock_1
*sb
= st
->sb
;
818 if (sb
->set_name
[i
] == '\n' ||
819 sb
->set_name
[i
] == '\0') {
824 printf("MD_NAME=%.*s\n", len
, sb
->set_name
);
827 static int examine_badblocks_super1(struct supertype
*st
, int fd
, char *devname
)
829 struct mdp_superblock_1
*sb
= st
->sb
;
830 unsigned long long offset
;
835 if (!sb
->bblog_size
|| __le16_to_cpu(sb
->bblog_size
) > 100
836 || !sb
->bblog_offset
){
837 printf("No bad-blocks list configured on %s\n", devname
);
840 if ((sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
842 printf("Bad-blocks list is empty in %s\n", devname
);
846 size
= __le16_to_cpu(sb
->bblog_size
)* 512;
847 if (posix_memalign((void**)&bbl
, 4096, size
) != 0) {
848 pr_err("could not allocate badblocks list\n");
851 offset
= __le64_to_cpu(sb
->super_offset
) +
852 (int)__le32_to_cpu(sb
->bblog_offset
);
854 if (lseek64(fd
, offset
, 0) < 0) {
855 pr_err("Cannot seek to bad-blocks list\n");
858 if (read(fd
, bbl
, size
) != size
) {
859 pr_err("Cannot read bad-blocks list\n");
862 /* 64bits per entry. 10 bits is block-count, 54 bits is block
863 * offset. Blocks are sectors unless bblog->shift makes them bigger
866 printf("Bad-blocks on %s:\n", devname
);
867 for (i
= 0; i
< size
/8; i
++, bbp
++) {
868 __u64 bb
= __le64_to_cpu(*bbp
);
869 int count
= bb
& 0x3ff;
870 unsigned long long sector
= bb
>> 10;
875 sector
<<= sb
->bblog_shift
;
876 count
<<= sb
->bblog_shift
;
878 printf("%20llu for %d sectors\n", sector
, count
);
885 static int match_home1(struct supertype
*st
, char *homehost
)
887 struct mdp_superblock_1
*sb
= st
->sb
;
888 int l
= homehost
? strlen(homehost
) : 0;
890 return (l
> 0 && l
< 32 &&
891 sb
->set_name
[l
] == ':' &&
892 strncmp(sb
->set_name
, homehost
, l
) == 0);
895 static void uuid_from_super1(struct supertype
*st
, int uuid
[4])
897 struct mdp_superblock_1
*super
= st
->sb
;
898 char *cuuid
= (char*)uuid
;
901 cuuid
[i
] = super
->set_uuid
[i
];
904 static void getinfo_super1(struct supertype
*st
, struct mdinfo
*info
, char *map
)
906 struct mdp_superblock_1
*sb
= st
->sb
;
907 struct bitmap_super_s
*bsb
= (void*)(((char*)sb
)+MAX_SB_SIZE
);
908 struct misc_dev_info
*misc
= (void*)(((char*)sb
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
912 unsigned int map_disks
= info
->array
.raid_disks
;
913 unsigned long long super_offset
;
914 unsigned long long data_size
;
916 memset(info
, 0, sizeof(*info
));
917 info
->array
.major_version
= 1;
918 info
->array
.minor_version
= st
->minor_version
;
919 info
->array
.patch_version
= 0;
920 info
->array
.raid_disks
= __le32_to_cpu(sb
->raid_disks
);
921 info
->array
.level
= __le32_to_cpu(sb
->level
);
922 info
->array
.layout
= __le32_to_cpu(sb
->layout
);
923 info
->array
.md_minor
= -1;
924 info
->array
.ctime
= __le64_to_cpu(sb
->ctime
);
925 info
->array
.utime
= __le64_to_cpu(sb
->utime
);
926 info
->array
.chunk_size
= __le32_to_cpu(sb
->chunksize
)*512;
928 (__le64_to_cpu(sb
->resync_offset
) == MaxSector
)
930 if (__le32_to_cpu(bsb
->nodes
) > 1)
931 info
->array
.state
|= (1 << MD_SB_CLUSTERED
);
933 info
->data_offset
= __le64_to_cpu(sb
->data_offset
);
934 info
->component_size
= __le64_to_cpu(sb
->size
);
935 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET
))
936 info
->bitmap_offset
= (int32_t)__le32_to_cpu(sb
->bitmap_offset
);
938 info
->disk
.major
= 0;
939 info
->disk
.minor
= 0;
940 info
->disk
.number
= __le32_to_cpu(sb
->dev_number
);
941 if (__le32_to_cpu(sb
->dev_number
) >= __le32_to_cpu(sb
->max_dev
) ||
942 __le32_to_cpu(sb
->dev_number
) >= MAX_DEVS
)
943 role
= MD_DISK_ROLE_FAULTY
;
945 role
= __le16_to_cpu(sb
->dev_roles
[__le32_to_cpu(sb
->dev_number
)]);
947 super_offset
= __le64_to_cpu(sb
->super_offset
);
948 if (info
->array
.level
<= 0)
949 data_size
= __le64_to_cpu(sb
->data_size
);
951 data_size
= __le64_to_cpu(sb
->size
);
952 if (info
->data_offset
< super_offset
) {
953 unsigned long long end
;
954 info
->space_before
= info
->data_offset
;
957 if (sb
->bblog_offset
&& sb
->bblog_size
) {
958 unsigned long long bboffset
= super_offset
;
959 bboffset
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
964 if (super_offset
+ info
->bitmap_offset
< end
)
965 end
= super_offset
+ info
->bitmap_offset
;
967 if (info
->data_offset
+ data_size
< end
)
968 info
->space_after
= end
- data_size
- info
->data_offset
;
970 info
->space_after
= 0;
972 unsigned long long earliest
;
973 earliest
= super_offset
+ (32+4)*2; /* match kernel */
974 if (info
->bitmap_offset
> 0) {
975 unsigned long long bmend
= info
->bitmap_offset
;
976 unsigned long long size
= __le64_to_cpu(bsb
->sync_size
);
977 size
/= __le32_to_cpu(bsb
->chunksize
) >> 9;
978 size
= (size
+ 7) >> 3;
979 size
+= sizeof(bitmap_super_t
);
980 size
= ROUND_UP(size
, 4096);
983 if (bmend
> earliest
)
986 if (sb
->bblog_offset
&& sb
->bblog_size
) {
987 unsigned long long bbend
= super_offset
;
988 bbend
+= (int32_t)__le32_to_cpu(sb
->bblog_offset
);
989 bbend
+= __le16_to_cpu(sb
->bblog_size
);
990 if (bbend
> earliest
)
993 if (earliest
< info
->data_offset
)
994 info
->space_before
= info
->data_offset
- earliest
;
996 info
->space_before
= 0;
997 info
->space_after
= misc
->device_size
- data_size
- info
->data_offset
;
999 if (info
->space_before
== 0 && info
->space_after
== 0) {
1000 /* It will look like we don't support data_offset changes,
1001 * be we do - it's just that there is no room.
1002 * A change that reduced the number of devices should
1003 * still be allowed, so set the otherwise useless value of '1'
1005 info
->space_after
= 1;
1008 info
->disk
.raid_disk
= -1;
1010 case MD_DISK_ROLE_SPARE
:
1011 info
->disk
.state
= 0; /* spare: not active, not sync, not faulty */
1013 case MD_DISK_ROLE_FAULTY
:
1014 info
->disk
.state
= 1; /* faulty */
1016 case MD_DISK_ROLE_JOURNAL
:
1017 info
->disk
.state
= (1 << MD_DISK_JOURNAL
);
1018 info
->disk
.raid_disk
= role
;
1019 info
->space_after
= (misc
->device_size
- info
->data_offset
) % 8; /* journal uses all 4kB blocks*/
1022 info
->disk
.state
= 6; /* active and in sync */
1023 info
->disk
.raid_disk
= role
;
1025 if (sb
->devflags
& WriteMostly1
)
1026 info
->disk
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
1027 info
->events
= __le64_to_cpu(sb
->events
);
1028 sprintf(info
->text_version
, "1.%d", st
->minor_version
);
1029 info
->safe_mode_delay
= 200;
1031 memcpy(info
->uuid
, sb
->set_uuid
, 16);
1033 strncpy(info
->name
, sb
->set_name
, 32);
1036 if ((__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_REPLACEMENT
)) {
1037 info
->disk
.state
&= ~(1 << MD_DISK_SYNC
);
1038 info
->disk
.state
|= 1 << MD_DISK_REPLACEMENT
;
1041 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET
))
1042 info
->recovery_start
= __le32_to_cpu(sb
->recovery_offset
);
1044 info
->recovery_start
= MaxSector
;
1046 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
)) {
1047 info
->reshape_active
= 1;
1048 if ((sb
->feature_map
& __le32_to_cpu(MD_FEATURE_NEW_OFFSET
)) &&
1049 sb
->new_offset
!= 0)
1050 info
->reshape_active
|= RESHAPE_NO_BACKUP
;
1051 info
->reshape_progress
= __le64_to_cpu(sb
->reshape_position
);
1052 info
->new_level
= __le32_to_cpu(sb
->new_level
);
1053 info
->delta_disks
= __le32_to_cpu(sb
->delta_disks
);
1054 info
->new_layout
= __le32_to_cpu(sb
->new_layout
);
1055 info
->new_chunk
= __le32_to_cpu(sb
->new_chunk
)<<9;
1056 if (info
->delta_disks
< 0)
1057 info
->array
.raid_disks
-= info
->delta_disks
;
1059 info
->reshape_active
= 0;
1061 info
->recovery_blocked
= info
->reshape_active
;
1064 for (i
=0; i
<map_disks
; i
++)
1066 for (i
= 0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
1067 role
= __le16_to_cpu(sb
->dev_roles
[i
]);
1068 if (/*role == MD_DISK_ROLE_SPARE || */role
< (unsigned) info
->array
.raid_disks
) {
1070 if (map
&& role
< map_disks
)
1075 info
->array
.working_disks
= working
;
1076 if (sb
->feature_map
& __le32_to_cpu(MD_FEATURE_JOURNAL
))
1077 info
->journal_device_required
= 1;
1078 info
->journal_clean
= 0;
1081 static struct mdinfo
*container_content1(struct supertype
*st
, char *subarray
)
1083 struct mdinfo
*info
;
1088 info
= xmalloc(sizeof(*info
));
1089 getinfo_super1(st
, info
, NULL
);
1093 static int update_super1(struct supertype
*st
, struct mdinfo
*info
,
1095 char *devname
, int verbose
,
1096 int uuid_set
, char *homehost
)
1098 /* NOTE: for 'assemble' and 'force' we need to return non-zero
1099 * if any change was made. For others, the return value is
1104 struct mdp_superblock_1
*sb
= st
->sb
;
1105 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
1107 if (bms
->version
== BITMAP_MAJOR_CLUSTERED
&& dlm_funs_ready()) {
1108 rv
= cluster_get_dlmlock(&lockid
);
1110 pr_err("Cannot get dlmlock in %s return %d\n", __func__
, rv
);
1111 cluster_release_dlmlock(lockid
);
1116 if (strcmp(update
, "homehost") == 0 &&
1118 /* Note that 'homehost' is special as it is really
1123 c
= strchr(sb
->set_name
, ':');
1125 strncpy(info
->name
, c
+1, 31 - (c
-sb
->set_name
));
1127 strncpy(info
->name
, sb
->set_name
, 32);
1131 if (strcmp(update
, "force-one")==0) {
1132 /* Not enough devices for a working array,
1133 * so bring this one up-to-date
1135 if (sb
->events
!= __cpu_to_le64(info
->events
))
1137 sb
->events
= __cpu_to_le64(info
->events
);
1138 } else if (strcmp(update
, "force-array")==0) {
1139 /* Degraded array and 'force' requests to
1140 * maybe need to mark it 'clean'.
1142 switch(__le32_to_cpu(sb
->level
)) {
1143 case 5: case 4: case 6:
1144 /* need to force clean */
1145 if (sb
->resync_offset
!= MaxSector
)
1147 sb
->resync_offset
= MaxSector
;
1149 } else if (strcmp(update
, "assemble")==0) {
1150 int d
= info
->disk
.number
;
1152 if (info
->disk
.state
& (1<<MD_DISK_ACTIVE
))
1153 want
= info
->disk
.raid_disk
;
1154 else if (info
->disk
.state
& (1<<MD_DISK_JOURNAL
))
1155 want
= MD_DISK_ROLE_JOURNAL
;
1157 want
= MD_DISK_ROLE_SPARE
;
1158 if (sb
->dev_roles
[d
] != __cpu_to_le16(want
)) {
1159 sb
->dev_roles
[d
] = __cpu_to_le16(want
);
1162 if (info
->reshape_active
&&
1163 sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1164 info
->delta_disks
>= 0 &&
1165 info
->reshape_progress
< __le64_to_cpu(sb
->reshape_position
)) {
1166 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1169 if (info
->reshape_active
&&
1170 sb
->feature_map
& __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE
) &&
1171 info
->delta_disks
< 0 &&
1172 info
->reshape_progress
> __le64_to_cpu(sb
->reshape_position
)) {
1173 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1176 } else if (strcmp(update
, "linear-grow-new") == 0) {
1179 unsigned int max
= __le32_to_cpu(sb
->max_dev
);
1181 for (i
=0 ; i
< max
; i
++)
1182 if (__le16_to_cpu(sb
->dev_roles
[i
]) >= MD_DISK_ROLE_FAULTY
)
1184 sb
->dev_number
= __cpu_to_le32(i
);
1185 info
->disk
.number
= i
;
1186 if (max
>= __le32_to_cpu(sb
->max_dev
))
1187 sb
->max_dev
= __cpu_to_le32(max
+1);
1189 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1190 read(rfd
, sb
->device_uuid
, 16) != 16) {
1191 __u32 r
[4] = {random(), random(), random(), random()};
1192 memcpy(sb
->device_uuid
, r
, 16);
1198 __cpu_to_le16(info
->disk
.raid_disk
);
1200 fd
= open(devname
, O_RDONLY
);
1202 unsigned long long ds
;
1203 get_dev_size(fd
, devname
, &ds
);
1206 if (__le64_to_cpu(sb
->super_offset
) <
1207 __le64_to_cpu(sb
->data_offset
)) {
1208 sb
->data_size
= __cpu_to_le64(
1209 ds
- __le64_to_cpu(sb
->data_offset
));
1212 ds
&= ~(unsigned long long)(4*2-1);
1213 sb
->super_offset
= __cpu_to_le64(ds
);
1214 sb
->data_size
= __cpu_to_le64(
1215 ds
- __le64_to_cpu(sb
->data_offset
));
1218 } else if (strcmp(update
, "linear-grow-update") == 0) {
1219 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
1220 sb
->dev_roles
[info
->disk
.number
] =
1221 __cpu_to_le16(info
->disk
.raid_disk
);
1222 } else if (strcmp(update
, "resync") == 0) {
1223 /* make sure resync happens */
1224 sb
->resync_offset
= 0ULL;
1225 } else if (strcmp(update
, "uuid") == 0) {
1226 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
1228 if (__le32_to_cpu(sb
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
1229 struct bitmap_super_s
*bm
;
1230 bm
= (struct bitmap_super_s
*)(st
->sb
+MAX_SB_SIZE
);
1231 memcpy(bm
->uuid
, sb
->set_uuid
, 16);
1233 } else if (strcmp(update
, "no-bitmap") == 0) {
1234 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
);
1235 } else if (strcmp(update
, "bbl") == 0) {
1236 /* only possible if there is room after the bitmap, or if
1237 * there is no bitmap
1239 unsigned long long sb_offset
= __le64_to_cpu(sb
->super_offset
);
1240 unsigned long long data_offset
= __le64_to_cpu(sb
->data_offset
);
1241 long bitmap_offset
= (long)(int32_t)__le32_to_cpu(sb
->bitmap_offset
);
1242 long bm_sectors
= 0;
1246 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1247 struct bitmap_super_s
*bsb
;
1248 bsb
= (struct bitmap_super_s
*)(((char*)sb
)+MAX_SB_SIZE
);
1249 bm_sectors
= bitmap_sectors(bsb
);
1252 if (sb_offset
< data_offset
) {
1253 /* 1.1 or 1.2. Put bbl after bitmap leaving at least 32K
1256 bb_offset
= sb_offset
+ 8;
1257 if (bm_sectors
&& bitmap_offset
> 0)
1258 bb_offset
= bitmap_offset
+ bm_sectors
;
1259 while (bb_offset
< (long)sb_offset
+ 8 + 32*2
1260 && bb_offset
+ 8+8 <= (long)data_offset
)
1261 /* too close to bitmap, and room to grow */
1263 if (bb_offset
+ 8 <= (long)data_offset
) {
1264 sb
->bblog_size
= __cpu_to_le16(8);
1265 sb
->bblog_offset
= __cpu_to_le32(bb_offset
);
1268 /* 1.0 - Put bbl just before super block */
1269 if (bm_sectors
&& bitmap_offset
< 0)
1270 space
= -bitmap_offset
- bm_sectors
;
1272 space
= sb_offset
- data_offset
-
1273 __le64_to_cpu(sb
->data_size
);
1275 sb
->bblog_size
= __cpu_to_le16(8);
1276 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1279 } else if (strcmp(update
, "no-bbl") == 0) {
1280 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
))
1281 pr_err("Cannot remove active bbl from %s\n",devname
);
1284 sb
->bblog_shift
= 0;
1285 sb
->bblog_offset
= 0;
1287 } else if (strcmp(update
, "force-no-bbl") == 0) {
1288 sb
->feature_map
&= ~ __cpu_to_le32(MD_FEATURE_BAD_BLOCKS
);
1290 sb
->bblog_shift
= 0;
1291 sb
->bblog_offset
= 0;
1292 } else if (strcmp(update
, "name") == 0) {
1293 if (info
->name
[0] == 0)
1294 sprintf(info
->name
, "%d", info
->array
.md_minor
);
1295 memset(sb
->set_name
, 0, sizeof(sb
->set_name
));
1297 strchr(info
->name
, ':') == NULL
&&
1298 strlen(homehost
)+1+strlen(info
->name
) < 32) {
1299 strcpy(sb
->set_name
, homehost
);
1300 strcat(sb
->set_name
, ":");
1301 strcat(sb
->set_name
, info
->name
);
1303 strcpy(sb
->set_name
, info
->name
);
1304 } else if (strcmp(update
, "devicesize") == 0 &&
1305 __le64_to_cpu(sb
->super_offset
) <
1306 __le64_to_cpu(sb
->data_offset
)) {
1307 /* set data_size to device size less data_offset */
1308 struct misc_dev_info
*misc
= (struct misc_dev_info
*)
1309 (st
->sb
+ MAX_SB_SIZE
+ BM_SUPER_SIZE
);
1310 sb
->data_size
= __cpu_to_le64(
1311 misc
->device_size
- __le64_to_cpu(sb
->data_offset
));
1312 } else if (strncmp(update
, "revert-reshape", 14) == 0) {
1314 if (!(sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
)))
1315 pr_err("No active reshape to revert on %s\n",
1319 unsigned long long reshape_sectors
;
1322 /* If the reshape hasn't started, just stop it.
1323 * It is conceivable that a stripe was modified but
1324 * the metadata not updated. In that case the backup
1325 * should have been used to get passed the critical stage.
1326 * If that couldn't happen, the "-nobackup" version
1329 if (strcmp(update
, "revert-reshape-nobackup") == 0 &&
1330 sb
->reshape_position
== 0 &&
1331 (__le32_to_cpu(sb
->delta_disks
) > 0 ||
1332 (__le32_to_cpu(sb
->delta_disks
) == 0 &&
1333 !(sb
->feature_map
& __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS
))))) {
1334 sb
->feature_map
&= ~__cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE
);
1335 sb
->raid_disks
= __cpu_to_le32(__le32_to_cpu(sb
->raid_disks
) -
1336 __le32_to_cpu(sb
->delta_disks
));
1337 sb
->delta_disks
= 0;
1340 /* reshape_position is a little messy.
1341 * Its value must be a multiple of the larger
1342 * chunk size, and of the "after" data disks.
1343 * So when reverting we need to change it to
1344 * be a multiple of the new "after" data disks,
1345 * which is the old "before".
1346 * If it isn't already a multiple of 'before',
1347 * the only thing we could do would be
1348 * copy some block around on the disks, which
1349 * is easy to get wrong.
1350 * So we reject a revert-reshape unless the
1351 * alignment is good.
1353 if (__le32_to_cpu(sb
->level
) >= 4 &&
1354 __le32_to_cpu(sb
->level
) <= 6) {
1355 reshape_sectors
= __le64_to_cpu(sb
->reshape_position
);
1356 reshape_chunk
= __le32_to_cpu(sb
->new_chunk
);
1357 reshape_chunk
*= __le32_to_cpu(sb
->raid_disks
) - __le32_to_cpu(sb
->delta_disks
) -
1358 (__le32_to_cpu(sb
->level
)==6 ? 2 : 1);
1359 if (reshape_sectors
% reshape_chunk
) {
1360 pr_err("Reshape position is not suitably aligned.\n");
1361 pr_err("Try normal assembly and stop again\n");
1365 sb
->raid_disks
= __cpu_to_le32(__le32_to_cpu(sb
->raid_disks
) -
1366 __le32_to_cpu(sb
->delta_disks
));
1367 if (sb
->delta_disks
== 0)
1368 sb
->feature_map
^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS
);
1370 sb
->delta_disks
= __cpu_to_le32(-__le32_to_cpu(sb
->delta_disks
));
1372 temp
= sb
->new_layout
;
1373 sb
->new_layout
= sb
->layout
;
1376 temp
= sb
->new_chunk
;
1377 sb
->new_chunk
= sb
->chunksize
;
1378 sb
->chunksize
= temp
;
1380 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_NEW_OFFSET
)) {
1381 long offset_delta
= (int32_t)__le32_to_cpu(sb
->new_offset
);
1382 sb
->data_offset
= __cpu_to_le64(__le64_to_cpu(sb
->data_offset
) + offset_delta
);
1383 sb
->new_offset
= __cpu_to_le32(-offset_delta
);
1384 sb
->data_size
= __cpu_to_le64(__le64_to_cpu(sb
->data_size
) - offset_delta
);
1388 } else if (strcmp(update
, "_reshape_progress")==0)
1389 sb
->reshape_position
= __cpu_to_le64(info
->reshape_progress
);
1390 else if (strcmp(update
, "writemostly")==0)
1391 sb
->devflags
|= WriteMostly1
;
1392 else if (strcmp(update
, "readwrite")==0)
1393 sb
->devflags
&= ~WriteMostly1
;
1397 sb
->sb_csum
= calc_sb_1_csum(sb
);
1398 if (bms
->version
== BITMAP_MAJOR_CLUSTERED
&& dlm_funs_ready())
1399 cluster_release_dlmlock(lockid
);
1404 static int init_super1(struct supertype
*st
, mdu_array_info_t
*info
,
1405 unsigned long long size
, char *name
, char *homehost
,
1406 int *uuid
, unsigned long long data_offset
)
1408 struct mdp_superblock_1
*sb
;
1414 if (posix_memalign((void**)&sb
, 4096, SUPER1_SIZE
) != 0) {
1415 pr_err("could not allocate superblock\n");
1418 memset(sb
, 0, SUPER1_SIZE
);
1422 /* zeroing superblock */
1426 spares
= info
->working_disks
- info
->active_disks
;
1427 if (info
->raid_disks
+ spares
> MAX_DEVS
) {
1428 pr_err("too many devices requested: %d+%d > %d\n",
1429 info
->raid_disks
, spares
, MAX_DEVS
);
1433 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
1434 sb
->major_version
= __cpu_to_le32(1);
1435 sb
->feature_map
= 0;
1439 copy_uuid(sb
->set_uuid
, uuid
, super1
.swapuuid
);
1441 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1442 read(rfd
, sb
->set_uuid
, 16) != 16) {
1443 __u32 r
[4] = {random(), random(), random(), random()};
1444 memcpy(sb
->set_uuid
, r
, 16);
1446 if (rfd
>= 0) close(rfd
);
1449 if (name
== NULL
|| *name
== 0) {
1450 sprintf(defname
, "%d", info
->md_minor
);
1454 strchr(name
, ':')== NULL
&&
1455 strlen(homehost
)+1+strlen(name
) < 32) {
1456 strcpy(sb
->set_name
, homehost
);
1457 strcat(sb
->set_name
, ":");
1458 strcat(sb
->set_name
, name
);
1460 strcpy(sb
->set_name
, name
);
1462 sb
->ctime
= __cpu_to_le64((unsigned long long)time(0));
1463 sb
->level
= __cpu_to_le32(info
->level
);
1464 sb
->layout
= __cpu_to_le32(info
->layout
);
1465 sb
->size
= __cpu_to_le64(size
*2ULL);
1466 sb
->chunksize
= __cpu_to_le32(info
->chunk_size
>>9);
1467 sb
->raid_disks
= __cpu_to_le32(info
->raid_disks
);
1469 sb
->data_offset
= __cpu_to_le64(data_offset
);
1470 sb
->data_size
= __cpu_to_le64(0);
1471 sb
->super_offset
= __cpu_to_le64(0);
1472 sb
->recovery_offset
= __cpu_to_le64(0);
1474 sb
->utime
= sb
->ctime
;
1475 sb
->events
= __cpu_to_le64(1);
1476 if (info
->state
& (1<<MD_SB_CLEAN
))
1477 sb
->resync_offset
= MaxSector
;
1479 sb
->resync_offset
= 0;
1480 sbsize
= sizeof(struct mdp_superblock_1
) + 2 * (info
->raid_disks
+ spares
);
1481 sbsize
= ROUND_UP(sbsize
, 512);
1482 sb
->max_dev
= __cpu_to_le32((sbsize
- sizeof(struct mdp_superblock_1
)) / 2);
1484 memset(sb
->dev_roles
, 0xff, MAX_SB_SIZE
- sizeof(struct mdp_superblock_1
));
1492 long long data_offset
;
1493 mdu_disk_info_t disk
;
1494 struct devinfo
*next
;
1497 /* Add a device to the superblock being created */
1498 static int add_to_super1(struct supertype
*st
, mdu_disk_info_t
*dk
,
1499 int fd
, char *devname
, unsigned long long data_offset
)
1501 struct mdp_superblock_1
*sb
= st
->sb
;
1502 __u16
*rp
= sb
->dev_roles
+ dk
->number
;
1503 struct devinfo
*di
, **dip
;
1504 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
1507 if (bms
->version
== BITMAP_MAJOR_CLUSTERED
&& dlm_funs_ready()) {
1508 rv
= cluster_get_dlmlock(&lockid
);
1510 pr_err("Cannot get dlmlock in %s return %d\n", __func__
, rv
);
1511 cluster_release_dlmlock(lockid
);
1516 if ((dk
->state
& 6) == 6) /* active, sync */
1517 *rp
= __cpu_to_le16(dk
->raid_disk
);
1518 else if (dk
->state
& (1<<MD_DISK_JOURNAL
))
1519 *rp
= MD_DISK_ROLE_JOURNAL
;
1520 else if ((dk
->state
& ~2) == 0) /* active or idle -> spare */
1521 *rp
= MD_DISK_ROLE_SPARE
;
1523 *rp
= MD_DISK_ROLE_FAULTY
;
1525 if (dk
->number
>= (int)__le32_to_cpu(sb
->max_dev
) &&
1526 __le32_to_cpu(sb
->max_dev
) < MAX_DEVS
)
1527 sb
->max_dev
= __cpu_to_le32(dk
->number
+1);
1529 sb
->dev_number
= __cpu_to_le32(dk
->number
);
1530 sb
->devflags
= 0; /* don't copy another disks flags */
1531 sb
->sb_csum
= calc_sb_1_csum(sb
);
1533 dip
= (struct devinfo
**)&st
->info
;
1535 dip
= &(*dip
)->next
;
1536 di
= xmalloc(sizeof(struct devinfo
));
1538 di
->devname
= devname
;
1540 di
->data_offset
= data_offset
;
1544 if (bms
->version
== BITMAP_MAJOR_CLUSTERED
&& dlm_funs_ready())
1545 cluster_release_dlmlock(lockid
);
1551 static int locate_bitmap1(struct supertype
*st
, int fd
, int node_num
);
1553 static int store_super1(struct supertype
*st
, int fd
)
1555 struct mdp_superblock_1
*sb
= st
->sb
;
1556 unsigned long long sb_offset
;
1557 struct align_fd afd
;
1559 unsigned long long dsize
;
1560 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
1563 if (bms
->version
== BITMAP_MAJOR_CLUSTERED
&& dlm_funs_ready()) {
1564 rv
= cluster_get_dlmlock(&lockid
);
1566 pr_err("Cannot get dlmlock in %s return %d\n", __func__
, rv
);
1567 cluster_release_dlmlock(lockid
);
1572 if (!get_dev_size(fd
, NULL
, &dsize
))
1583 * Calculate the position of the superblock.
1584 * It is always aligned to a 4K boundary and
1585 * depending on minor_version, it can be:
1586 * 0: At least 8K, but less than 12K, from end of device
1587 * 1: At start of device
1588 * 2: 4K from start of device.
1590 switch(st
->minor_version
) {
1594 sb_offset
&= ~(4*2-1);
1606 if (sb_offset
!= __le64_to_cpu(sb
->super_offset
) &&
1607 0 != __le64_to_cpu(sb
->super_offset
)
1609 pr_err("internal error - sb_offset is wrong\n");
1613 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL)
1616 sbsize
= ROUND_UP(sizeof(*sb
) + 2 * __le32_to_cpu(sb
->max_dev
), 512);
1618 if (awrite(&afd
, sb
, sbsize
) != sbsize
)
1621 if (sb
->feature_map
& __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET
)) {
1622 struct bitmap_super_s
*bm
= (struct bitmap_super_s
*)
1623 (((char*)sb
)+MAX_SB_SIZE
);
1624 if (__le32_to_cpu(bm
->magic
) == BITMAP_MAGIC
) {
1625 locate_bitmap1(st
, fd
, 0);
1626 if (awrite(&afd
, bm
, sizeof(*bm
)) != sizeof(*bm
))
1631 if (bms
->version
== BITMAP_MAJOR_CLUSTERED
&& dlm_funs_ready())
1632 cluster_release_dlmlock(lockid
);
1637 static int load_super1(struct supertype
*st
, int fd
, char *devname
);
1639 static unsigned long choose_bm_space(unsigned long devsize
)
1641 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
1642 * if bigger than 200Gig, save 128k
1643 * NOTE: result must be multiple of 4K else bad things happen
1644 * on 4K-sector devices.
1646 if (devsize
< 64*2) return 0;
1647 if (devsize
- 64*2 >= 200*1024*1024*2)
1649 if (devsize
- 4*2 > 8*1024*1024*2)
1654 static void free_super1(struct supertype
*st
);
1656 #define META_BLOCK_SIZE 4096
1657 __u32
crc32c_le(__u32 crc
, unsigned char const *p
, size_t len
);
1660 static int write_empty_r5l_meta_block(struct supertype
*st
, int fd
)
1662 struct r5l_meta_block
*mb
;
1663 struct mdp_superblock_1
*sb
= st
->sb
;
1664 struct align_fd afd
;
1669 if (posix_memalign((void**)&mb
, 4096, META_BLOCK_SIZE
) != 0) {
1670 pr_err("Could not allocate memory for the meta block.\n");
1674 memset(mb
, 0, META_BLOCK_SIZE
);
1676 mb
->magic
= __cpu_to_le32(R5LOG_MAGIC
);
1677 mb
->version
= R5LOG_VERSION
;
1678 mb
->meta_size
= __cpu_to_le32(sizeof(struct r5l_meta_block
));
1679 mb
->seq
= __cpu_to_le64(random32());
1680 mb
->position
= __cpu_to_le64(0);
1682 crc
= crc32c_le(0xffffffff, sb
->set_uuid
, sizeof(sb
->set_uuid
));
1683 crc
= crc32c_le(crc
, (void *)mb
, META_BLOCK_SIZE
);
1686 if (lseek64(fd
, (sb
->data_offset
) * 512, 0) < 0LL) {
1687 pr_err("cannot seek to offset of the meta block\n");
1691 if (awrite(&afd
, mb
, META_BLOCK_SIZE
) != META_BLOCK_SIZE
) {
1692 pr_err("failed to store write the meta block \n");
1705 static int write_init_super1(struct supertype
*st
)
1707 struct mdp_superblock_1
*sb
= st
->sb
;
1708 struct supertype
*refst
;
1711 unsigned long long bm_space
;
1713 unsigned long long dsize
, array_size
;
1714 unsigned long long sb_offset
;
1715 unsigned long long data_offset
;
1717 for (di
= st
->info
; di
; di
= di
->next
) {
1718 if (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))
1719 sb
->feature_map
|= MD_FEATURE_JOURNAL
;
1722 for (di
= st
->info
; di
; di
= di
->next
) {
1723 if (di
->disk
.state
& (1 << MD_DISK_FAULTY
))
1728 while (Kill(di
->devname
, NULL
, 0, -1, 1) == 0)
1731 sb
->dev_number
= __cpu_to_le32(di
->disk
.number
);
1732 if (di
->disk
.state
& (1<<MD_DISK_WRITEMOSTLY
))
1733 sb
->devflags
|= WriteMostly1
;
1735 sb
->devflags
&= ~WriteMostly1
;
1737 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
1738 read(rfd
, sb
->device_uuid
, 16) != 16) {
1739 __u32 r
[4] = {random(), random(), random(), random()};
1740 memcpy(sb
->device_uuid
, r
, 16);
1745 if (!(di
->disk
.state
& (1<<MD_DISK_JOURNAL
)))
1748 refst
= dup_super(st
);
1749 if (load_super1(refst
, di
->fd
, NULL
)==0) {
1750 struct mdp_superblock_1
*refsb
= refst
->sb
;
1752 memcpy(sb
->device_uuid
, refsb
->device_uuid
, 16);
1753 if (memcmp(sb
->set_uuid
, refsb
->set_uuid
, 16)==0) {
1754 /* same array, so preserve events and
1756 sb
->events
= refsb
->events
;
1757 /* bugs in 2.6.17 and earlier mean the
1758 * dev_number chosen in Manage must be preserved
1760 if (get_linux_version() >= 2006018)
1761 sb
->dev_number
= refsb
->dev_number
;
1767 if (!get_dev_size(di
->fd
, NULL
, &dsize
)) {
1780 * Calculate the position of the superblock.
1781 * It is always aligned to a 4K boundary and
1782 * depending on minor_version, it can be:
1783 * 0: At least 8K, but less than 12K, from end of device
1784 * 1: At start of device
1785 * 2: 4K from start of device.
1786 * data_offset has already been set.
1788 array_size
= __le64_to_cpu(sb
->size
);
1789 /* work out how much space we left for a bitmap,
1790 * Add 8 sectors for bad block log */
1791 bm_space
= choose_bm_space(array_size
) + 8;
1793 data_offset
= di
->data_offset
;
1794 if (data_offset
== INVALID_SECTORS
)
1795 data_offset
= st
->data_offset
;
1796 switch(st
->minor_version
) {
1798 if (data_offset
== INVALID_SECTORS
)
1802 sb_offset
&= ~(4*2-1);
1803 sb
->data_offset
= __cpu_to_le64(data_offset
);
1804 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1805 if (sb_offset
< array_size
+ bm_space
)
1806 bm_space
= sb_offset
- array_size
;
1807 sb
->data_size
= __cpu_to_le64(sb_offset
- bm_space
);
1808 if (bm_space
>= 8) {
1809 sb
->bblog_size
= __cpu_to_le16(8);
1810 sb
->bblog_offset
= __cpu_to_le32((unsigned)-8);
1814 sb
->super_offset
= __cpu_to_le64(0);
1815 if (data_offset
== INVALID_SECTORS
)
1818 sb
->data_offset
= __cpu_to_le64(data_offset
);
1819 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
1820 if (data_offset
>= 8 + 32*2 + 8) {
1821 sb
->bblog_size
= __cpu_to_le16(8);
1822 sb
->bblog_offset
= __cpu_to_le32(8 + 32*2);
1823 } else if (data_offset
>= 16) {
1824 sb
->bblog_size
= __cpu_to_le16(8);
1825 sb
->bblog_offset
= __cpu_to_le32(data_offset
-8);
1830 sb
->super_offset
= __cpu_to_le64(sb_offset
);
1831 if (data_offset
== INVALID_SECTORS
)
1834 sb
->data_offset
= __cpu_to_le64(data_offset
);
1835 sb
->data_size
= __cpu_to_le64(dsize
- data_offset
);
1836 if (data_offset
>= 16 + 32*2 + 8) {
1837 sb
->bblog_size
= __cpu_to_le16(8);
1838 sb
->bblog_offset
= __cpu_to_le32(8 + 32*2);
1839 } else if (data_offset
>= 16+16) {
1840 sb
->bblog_size
= __cpu_to_le16(8);
1841 /* '8' sectors for the bblog, and another '8'
1842 * because we want offset from superblock, not
1845 sb
->bblog_offset
= __cpu_to_le32(data_offset
-8-8);
1849 pr_err("Failed to write invalid metadata format 1.%i to %s\n",
1850 st
->minor_version
, di
->devname
);
1854 /* Disable badblock log on clusters, or when explicitly requested */
1855 if (st
->nodes
> 0 || conf_get_create_info()->bblist
== 0) {
1857 sb
->bblog_offset
= 0;
1860 sb
->sb_csum
= calc_sb_1_csum(sb
);
1861 rv
= store_super1(st
, di
->fd
);
1863 if (rv
== 0 && (di
->disk
.state
& (1 << MD_DISK_JOURNAL
))) {
1864 rv
= write_empty_r5l_meta_block(st
, di
->fd
);
1869 if (rv
== 0 && (__le32_to_cpu(sb
->feature_map
) & 1))
1870 rv
= st
->ss
->write_bitmap(st
, di
->fd
, NoUpdate
);
1878 pr_err("Failed to write metadata to %s\n",
1885 static int compare_super1(struct supertype
*st
, struct supertype
*tst
)
1889 * 0 same, or first was empty, and second was copied
1890 * 1 second had wrong number
1892 * 3 wrong other info
1894 struct mdp_superblock_1
*first
= st
->sb
;
1895 struct mdp_superblock_1
*second
= tst
->sb
;
1897 if (second
->magic
!= __cpu_to_le32(MD_SB_MAGIC
))
1899 if (second
->major_version
!= __cpu_to_le32(1))
1903 if (posix_memalign((void**)&first
, 4096, SUPER1_SIZE
) != 0) {
1904 pr_err("could not allocate superblock\n");
1907 memcpy(first
, second
, SUPER1_SIZE
);
1911 if (memcmp(first
->set_uuid
, second
->set_uuid
, 16)!= 0)
1914 if (first
->ctime
!= second
->ctime
||
1915 first
->level
!= second
->level
||
1916 first
->layout
!= second
->layout
||
1917 first
->size
!= second
->size
||
1918 first
->chunksize
!= second
->chunksize
||
1919 first
->raid_disks
!= second
->raid_disks
)
1924 static int load_super1(struct supertype
*st
, int fd
, char *devname
)
1926 unsigned long long dsize
;
1927 unsigned long long sb_offset
;
1928 struct mdp_superblock_1
*super
;
1930 struct bitmap_super_s
*bsb
;
1931 struct misc_dev_info
*misc
;
1932 struct align_fd afd
;
1938 if (st
->ss
== NULL
|| st
->minor_version
== -1) {
1940 struct supertype tst
;
1941 __u64 bestctime
= 0;
1942 /* guess... choose latest ctime */
1943 memset(&tst
, 0, sizeof(tst
));
1945 for (tst
.minor_version
= 0; tst
.minor_version
<= 2 ; tst
.minor_version
++) {
1946 switch(load_super1(&tst
, fd
, devname
)) {
1947 case 0: super
= tst
.sb
;
1948 if (bestvers
== -1 ||
1949 bestctime
< __le64_to_cpu(super
->ctime
)) {
1950 bestvers
= tst
.minor_version
;
1951 bestctime
= __le64_to_cpu(super
->ctime
);
1956 case 1: return 1; /*bad device */
1957 case 2: break; /* bad, try next */
1960 if (bestvers
!= -1) {
1962 tst
.minor_version
= bestvers
;
1964 tst
.max_devs
= MAX_DEVS
;
1965 rv
= load_super1(&tst
, fd
, devname
);
1972 if (!get_dev_size(fd
, devname
, &dsize
))
1978 pr_err("%s is too small for md: size is %llu sectors.\n",
1984 * Calculate the position of the superblock.
1985 * It is always aligned to a 4K boundary and
1986 * depending on minor_version, it can be:
1987 * 0: At least 8K, but less than 12K, from end of device
1988 * 1: At start of device
1989 * 2: 4K from start of device.
1991 switch(st
->minor_version
) {
1995 sb_offset
&= ~(4*2-1);
2007 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL) {
2009 pr_err("Cannot seek to superblock on %s: %s\n",
2010 devname
, strerror(errno
));
2014 if (posix_memalign((void**)&super
, 4096, SUPER1_SIZE
) != 0) {
2015 pr_err("could not allocate superblock\n");
2019 if (aread(&afd
, super
, MAX_SB_SIZE
) != MAX_SB_SIZE
) {
2021 pr_err("Cannot read superblock on %s\n",
2027 if (__le32_to_cpu(super
->magic
) != MD_SB_MAGIC
) {
2029 pr_err("No super block found on %s (Expected magic %08x, got %08x)\n",
2030 devname
, MD_SB_MAGIC
, __le32_to_cpu(super
->magic
));
2035 if (__le32_to_cpu(super
->major_version
) != 1) {
2037 pr_err("Cannot interpret superblock on %s - version is %d\n",
2038 devname
, __le32_to_cpu(super
->major_version
));
2042 if (__le64_to_cpu(super
->super_offset
) != sb_offset
) {
2044 pr_err("No superblock found on %s (super_offset is wrong)\n",
2051 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
2053 misc
= (struct misc_dev_info
*) (((char*)super
)+MAX_SB_SIZE
+BM_SUPER_SIZE
);
2054 misc
->device_size
= dsize
;
2055 if (st
->data_offset
== INVALID_SECTORS
)
2056 st
->data_offset
= __le64_to_cpu(super
->data_offset
);
2058 /* Now check on the bitmap superblock */
2059 if ((__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) == 0)
2061 /* Read the bitmap superblock and make sure it looks
2062 * valid. If it doesn't clear the bit. An --assemble --force
2063 * should get that written out.
2065 locate_bitmap1(st
, fd
, 0);
2066 if (aread(&afd
, bsb
, 512) != 512)
2069 uuid_from_super1(st
, uuid
);
2070 if (__le32_to_cpu(bsb
->magic
) != BITMAP_MAGIC
||
2071 memcmp(bsb
->uuid
, uuid
, 16) != 0)
2076 super
->feature_map
= __cpu_to_le32(__le32_to_cpu(super
->feature_map
)
2077 & ~MD_FEATURE_BITMAP_OFFSET
);
2081 static struct supertype
*match_metadata_desc1(char *arg
)
2083 struct supertype
*st
= xcalloc(1, sizeof(*st
));
2085 st
->container_devnm
[0] = 0;
2087 st
->max_devs
= MAX_DEVS
;
2089 st
->data_offset
= INVALID_SECTORS
;
2090 /* leading zeros can be safely ignored. --detail generates them. */
2093 if (strcmp(arg
, "1.0") == 0 ||
2094 strcmp(arg
, "1.00") == 0) {
2095 st
->minor_version
= 0;
2098 if (strcmp(arg
, "1.1") == 0 ||
2099 strcmp(arg
, "1.01") == 0
2101 st
->minor_version
= 1;
2104 if (strcmp(arg
, "1.2") == 0 ||
2105 #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
2106 strcmp(arg
, "default") == 0 ||
2107 #endif /* DEFAULT_OLD_METADATA */
2108 strcmp(arg
, "1.02") == 0) {
2109 st
->minor_version
= 2;
2112 if (strcmp(arg
, "1") == 0 ||
2113 strcmp(arg
, "default") == 0) {
2114 st
->minor_version
= -1;
2122 /* find available size on device with this devsize, using
2123 * superblock type st, and reserving 'reserve' sectors for
2126 static __u64
avail_size1(struct supertype
*st
, __u64 devsize
,
2127 unsigned long long data_offset
)
2129 struct mdp_superblock_1
*super
= st
->sb
;
2136 if (__le32_to_cpu(super
->feature_map
)&MD_FEATURE_BITMAP_OFFSET
) {
2137 /* hot-add. allow for actual size of bitmap */
2138 struct bitmap_super_s
*bsb
;
2139 bsb
= (struct bitmap_super_s
*)(((char*)super
)+MAX_SB_SIZE
);
2140 bmspace
= bitmap_sectors(bsb
);
2143 /* Allow space for bad block log */
2144 if (super
->bblog_size
)
2145 bbspace
= __le16_to_cpu(super
->bblog_size
);
2147 if (st
->minor_version
< 0)
2148 /* not specified, so time to set default */
2149 st
->minor_version
= 2;
2151 if (data_offset
== INVALID_SECTORS
)
2152 data_offset
= st
->data_offset
;
2154 if (data_offset
!= INVALID_SECTORS
)
2155 switch(st
->minor_version
) {
2157 return devsize
- data_offset
- 8*2 - bbspace
;
2160 return devsize
- data_offset
;
2167 switch(st
->minor_version
) {
2170 return ((devsize
- 8*2 - bbspace
) & ~(4*2-1));
2172 /* at start, 4K for superblock and possible bitmap */
2173 return devsize
- 4*2 - bbspace
;
2175 /* 4k from start, 4K for superblock and possible bitmap */
2176 return devsize
- (4+4)*2 - bbspace
;
2182 add_internal_bitmap1(struct supertype
*st
,
2183 int *chunkp
, int delay
, int write_behind
,
2184 unsigned long long size
,
2185 int may_change
, int major
)
2188 * If not may_change, then this is a 'Grow' without sysfs support for
2189 * bitmaps, and the bitmap must fit after the superblock at 1K offset.
2190 * If may_change, then this is create or a Grow with sysfs syupport,
2191 * and we can put the bitmap wherever we like.
2193 * size is in sectors, chunk is in bytes !!!
2196 unsigned long long bits
;
2197 unsigned long long max_bits
;
2198 unsigned long long min_chunk
;
2200 long bbl_offset
, bbl_size
;
2201 unsigned long long chunk
= *chunkp
;
2205 struct mdp_superblock_1
*sb
= st
->sb
;
2206 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
) + MAX_SB_SIZE
);
2209 if (__le64_to_cpu(sb
->data_size
) == 0)
2210 /* Must be creating the array, else data_size would be non-zero */
2212 switch(st
->minor_version
) {
2214 /* either 3K after the superblock (when hot-add),
2215 * or some amount of space before.
2218 /* We are creating array, so we *know* how much room has
2223 room
= choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2225 room
= __le64_to_cpu(sb
->super_offset
)
2226 - __le64_to_cpu(sb
->data_offset
)
2227 - __le64_to_cpu(sb
->data_size
);
2228 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2231 bbl_offset
= (__s32
)__le32_to_cpu(sb
->bblog_offset
);
2232 if (bbl_size
< -bbl_offset
)
2233 bbl_size
= -bbl_offset
;
2235 if (!may_change
|| (room
< 3*2 &&
2236 __le32_to_cpu(sb
->max_dev
) <= 384)) {
2241 offset
= 0; /* means movable offset */
2246 case 2: /* between superblock and data */
2250 room
= choose_bm_space(__le64_to_cpu(sb
->size
)) + bbl_size
;
2252 room
= __le64_to_cpu(sb
->data_offset
)
2253 - __le64_to_cpu(sb
->super_offset
);
2254 bbl_size
= __le16_to_cpu(sb
->bblog_size
);
2256 room
= __le32_to_cpu(sb
->bblog_offset
) + bbl_size
;
2261 room
-= 2; /* Leave 1K for superblock */
2265 room
-= 4*2; /* leave 4K for superblock */
2275 if (chunk
== UnSet
&& room
> 128*2)
2276 /* Limit to 128K of bitmap when chunk size not requested */
2280 /* No room for a bitmap */
2283 max_bits
= (room
* 512 - sizeof(bitmap_super_t
)) * 8;
2285 min_chunk
= 4096; /* sub-page chunks don't work yet.. */
2286 bits
= (size
*512)/min_chunk
+1;
2287 while (bits
> max_bits
) {
2291 if (chunk
== UnSet
) {
2292 /* For practical purpose, 64Meg is a good
2293 * default chunk size for internal bitmaps.
2296 if (chunk
< 64*1024*1024)
2297 chunk
= 64*1024*1024;
2298 } else if (chunk
< min_chunk
)
2299 return 0; /* chunk size too small */
2300 if (chunk
== 0) /* rounding problem */
2304 /* start bitmap on a 4K boundary with enough space for
2307 bits
= (size
*512) / chunk
+ 1;
2308 room
= ((bits
+7)/8 + sizeof(bitmap_super_t
) +4095)/4096;
2309 room
*= 8; /* convert 4K blocks to sectors */
2310 offset
= -room
- bbl_size
;
2313 sb
->bitmap_offset
= (int32_t)__cpu_to_le32(offset
);
2315 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
)
2316 | MD_FEATURE_BITMAP_OFFSET
);
2317 memset(bms
, 0, sizeof(*bms
));
2318 bms
->magic
= __cpu_to_le32(BITMAP_MAGIC
);
2319 bms
->version
= __cpu_to_le32(major
);
2320 uuid_from_super1(st
, uuid
);
2321 memcpy(bms
->uuid
, uuid
, 16);
2322 bms
->chunksize
= __cpu_to_le32(chunk
);
2323 bms
->daemon_sleep
= __cpu_to_le32(delay
);
2324 bms
->sync_size
= __cpu_to_le64(size
);
2325 bms
->write_behind
= __cpu_to_le32(write_behind
);
2326 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2328 sb
->feature_map
= __cpu_to_le32(__le32_to_cpu(sb
->feature_map
)
2329 | MD_FEATURE_BITMAP_VERSIONED
);
2330 if (st
->cluster_name
) {
2331 len
= sizeof(bms
->cluster_name
);
2332 strncpy((char *)bms
->cluster_name
, st
->cluster_name
, len
);
2333 bms
->cluster_name
[len
- 1] = '\0';
2340 static int locate_bitmap1(struct supertype
*st
, int fd
, int node_num
)
2342 unsigned long long offset
;
2343 struct mdp_superblock_1
*sb
;
2348 if (st
->ss
->load_super(st
, fd
, NULL
))
2349 return -1; /* no error I hope... */
2354 if ((__le32_to_cpu(sb
->feature_map
) & MD_FEATURE_BITMAP_OFFSET
))
2358 offset
= __le64_to_cpu(sb
->super_offset
);
2359 offset
+= (int32_t) __le32_to_cpu(sb
->bitmap_offset
) * (node_num
+ 1);
2362 lseek64(fd
, offset
<<9, 0);
2366 static int write_bitmap1(struct supertype
*st
, int fd
, enum bitmap_update update
)
2368 struct mdp_superblock_1
*sb
= st
->sb
;
2369 bitmap_super_t
*bms
= (bitmap_super_t
*)(((char*)sb
)+MAX_SB_SIZE
);
2372 int towrite
, n
, len
;
2373 struct align_fd afd
;
2375 unsigned long long total_bm_space
, bm_space_per_node
;
2379 /* update cluster name */
2380 if (st
->cluster_name
) {
2381 len
= sizeof(bms
->cluster_name
);
2382 memset((char *)bms
->cluster_name
, 0, len
);
2383 strncpy((char *)bms
->cluster_name
,
2384 st
->cluster_name
, len
);
2385 bms
->cluster_name
[len
- 1] = '\0';
2389 /* cluster md only supports superblock 1.2 now */
2390 if (st
->minor_version
!= 2) {
2391 pr_err("Warning: cluster md only works with superblock 1.2\n");
2395 /* Each node has an independent bitmap, it is necessary to calculate the
2396 * space is enough or not, first get how many bytes for the total bitmap */
2397 bm_space_per_node
= calc_bitmap_size(bms
, 4096);
2399 total_bm_space
= 512 * (__le64_to_cpu(sb
->data_offset
) - __le64_to_cpu(sb
->super_offset
));
2400 total_bm_space
= total_bm_space
- 4096; /* leave another 4k for superblock */
2402 if (bm_space_per_node
* st
->nodes
> total_bm_space
) {
2403 pr_err("Warning: The max num of nodes can't exceed %llu\n",
2404 total_bm_space
/ bm_space_per_node
);
2408 bms
->nodes
= __cpu_to_le32(st
->nodes
);
2417 locate_bitmap1(st
, fd
, 0);
2419 if (posix_memalign(&buf
, 4096, 4096))
2423 /* Only the bitmap[0] should resync
2424 * whole device on initial assembly
2427 memset(buf
, 0x00, 4096);
2429 memset(buf
, 0xff, 4096);
2430 memcpy(buf
, (char *)bms
, sizeof(bitmap_super_t
));
2432 towrite
= calc_bitmap_size(bms
, 4096);
2433 while (towrite
> 0) {
2437 n
= awrite(&afd
, buf
, n
);
2443 memset(buf
, 0x00, 4096);
2445 memset(buf
, 0xff, 4096);
2452 } while (++i
< __le32_to_cpu(bms
->nodes
));
2458 static void free_super1(struct supertype
*st
)
2464 struct devinfo
*di
= st
->info
;
2465 st
->info
= di
->next
;
2474 static int validate_geometry1(struct supertype
*st
, int level
,
2475 int layout
, int raiddisks
,
2476 int *chunk
, unsigned long long size
,
2477 unsigned long long data_offset
,
2478 char *subdev
, unsigned long long *freesize
,
2481 unsigned long long ldsize
, devsize
;
2483 unsigned long long headroom
;
2486 if (level
== LEVEL_CONTAINER
) {
2488 pr_err("1.x metadata does not support containers\n");
2491 if (*chunk
== UnSet
)
2492 *chunk
= DEFAULT_CHUNK
;
2497 if (st
->minor_version
< 0)
2498 /* not specified, so time to set default */
2499 st
->minor_version
= 2;
2501 fd
= open(subdev
, O_RDONLY
|O_EXCL
, 0);
2504 pr_err("super1.x cannot open %s: %s\n",
2505 subdev
, strerror(errno
));
2509 if (!get_dev_size(fd
, subdev
, &ldsize
)) {
2515 devsize
= ldsize
>> 9;
2521 /* creating: allow suitable space for bitmap */
2522 bmspace
= choose_bm_space(devsize
);
2524 if (data_offset
== INVALID_SECTORS
)
2525 data_offset
= st
->data_offset
;
2526 if (data_offset
== INVALID_SECTORS
)
2527 switch (st
->minor_version
) {
2533 /* Choose data offset appropriate for this device
2534 * and use as default for whole array.
2535 * The data_offset must allow for bitmap space
2536 * and base metadata, should allow for some headroom
2537 * for reshape, and should be rounded to multiple
2539 * Headroom is limited to 128M, but aim for about 0.1%
2541 headroom
= 128*1024*2;
2542 while ((headroom
<< 10) > devsize
&&
2544 headroom
/ 2 >= ((unsigned)(*chunk
)*2)*2))
2546 data_offset
= 12*2 + bmspace
+ headroom
;
2547 #define ONE_MEG (2*1024)
2548 if (data_offset
> ONE_MEG
)
2549 data_offset
= (data_offset
/ ONE_MEG
) * ONE_MEG
;
2552 if (st
->data_offset
== INVALID_SECTORS
)
2553 st
->data_offset
= data_offset
;
2554 switch(st
->minor_version
) {
2555 case 0: /* metadata at end. Round down and subtract space to reserve */
2556 devsize
= (devsize
& ~(4ULL*2-1));
2557 /* space for metadata, bblog, bitmap */
2558 devsize
-= 8*2 + 8 + bmspace
;
2562 devsize
-= data_offset
;
2565 *freesize
= devsize
;
2568 #endif /* MDASSEMBLE */
2570 void *super1_make_v0(struct supertype
*st
, struct mdinfo
*info
, mdp_super_t
*sb0
)
2572 /* Create a v1.0 superblock based on 'info'*/
2574 struct mdp_superblock_1
*sb
;
2577 unsigned long long offset
;
2579 if (posix_memalign(&ret
, 4096, 1024) != 0)
2582 memset(ret
, 0, 1024);
2583 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
2584 sb
->major_version
= __cpu_to_le32(1);
2586 copy_uuid(sb
->set_uuid
, info
->uuid
, super1
.swapuuid
);
2587 sprintf(sb
->set_name
, "%d", sb0
->md_minor
);
2588 sb
->ctime
= __cpu_to_le32(info
->array
.ctime
+1);
2589 sb
->level
= __cpu_to_le32(info
->array
.level
);
2590 sb
->layout
= __cpu_to_le32(info
->array
.layout
);
2591 sb
->size
= __cpu_to_le64(info
->component_size
);
2592 sb
->chunksize
= __cpu_to_le32(info
->array
.chunk_size
/512);
2593 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
2594 if (info
->array
.level
> 0)
2595 sb
->data_size
= sb
->size
;
2597 sb
->data_size
= st
->ss
->avail_size(st
, st
->devsize
/512, 0);
2598 sb
->resync_offset
= MaxSector
;
2599 sb
->max_dev
= __cpu_to_le32(MD_SB_DISKS
);
2600 sb
->dev_number
= __cpu_to_le32(info
->disk
.number
);
2601 sb
->utime
= __cpu_to_le64(info
->array
.utime
);
2603 offset
= st
->devsize
/512 - 8*2;
2605 sb
->super_offset
= __cpu_to_le64(offset
);
2606 //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset);
2608 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
2609 read(rfd
, sb
->device_uuid
, 16) != 16) {
2610 __u32 r
[4] = {random(), random(), random(), random()};
2611 memcpy(sb
->device_uuid
, r
, 16);
2616 for (i
= 0; i
< MD_SB_DISKS
; i
++) {
2617 int state
= sb0
->disks
[i
].state
;
2618 sb
->dev_roles
[i
] = MD_DISK_ROLE_SPARE
;
2619 if ((state
& (1<<MD_DISK_SYNC
)) &&
2620 !(state
& (1<<MD_DISK_FAULTY
)))
2621 sb
->dev_roles
[i
] = __cpu_to_le16(sb0
->disks
[i
].raid_disk
);
2623 sb
->sb_csum
= calc_sb_1_csum(sb
);
2627 struct superswitch super1
= {
2629 .examine_super
= examine_super1
,
2630 .brief_examine_super
= brief_examine_super1
,
2631 .export_examine_super
= export_examine_super1
,
2632 .detail_super
= detail_super1
,
2633 .brief_detail_super
= brief_detail_super1
,
2634 .export_detail_super
= export_detail_super1
,
2635 .write_init_super
= write_init_super1
,
2636 .validate_geometry
= validate_geometry1
,
2637 .add_to_super
= add_to_super1
,
2638 .examine_badblocks
= examine_badblocks_super1
,
2639 .copy_metadata
= copy_metadata1
,
2641 .match_home
= match_home1
,
2642 .uuid_from_super
= uuid_from_super1
,
2643 .getinfo_super
= getinfo_super1
,
2644 .container_content
= container_content1
,
2645 .update_super
= update_super1
,
2646 .init_super
= init_super1
,
2647 .store_super
= store_super1
,
2648 .compare_super
= compare_super1
,
2649 .load_super
= load_super1
,
2650 .match_metadata_desc
= match_metadata_desc1
,
2651 .avail_size
= avail_size1
,
2652 .add_internal_bitmap
= add_internal_bitmap1
,
2653 .locate_bitmap
= locate_bitmap1
,
2654 .write_bitmap
= write_bitmap1
,
2655 .free_super
= free_super1
,
2656 #if __BYTE_ORDER == BIG_ENDIAN