]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - super1.c
2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2004 Neil Brown <neilb@cse.unsw.edu.au>
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@cse.unsw.edu.au>
24 * School of Computer Science and Engineering
25 * The University of New South Wales
32 #include "asm/byteorder.h"
34 * The version-1 superblock :
35 * All numeric fields are little-endian.
37 * total size: 256 bytes plus 2 per device.
38 * 1K allows 384 devices.
40 struct mdp_superblock_1
{
41 /* constant array information - 128 bytes */
42 __u32 magic
; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
43 __u32 major_version
; /* 1 */
44 __u32 feature_map
; /* 0 for now */
45 __u32 pad0
; /* always set to 0 when writing */
47 __u8 set_uuid
[16]; /* user-space generated. */
48 char set_name
[32]; /* set and interpreted by user-space */
50 __u64 ctime
; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
51 __u32 level
; /* -4 (multipath), -1 (linear), 0,1,4,5 */
52 __u32 layout
; /* only for raid5 currently */
53 __u64 size
; /* used size of component devices, in 512byte sectors */
55 __u32 chunksize
; /* in 512byte sectors */
57 __u8 pad1
[128-96]; /* set to 0 when written */
59 /* constant this-device information - 64 bytes */
60 __u64 data_offset
; /* sector start of data, often 0 */
61 __u64 data_size
; /* sectors in this device that can be used for data */
62 __u64 super_offset
; /* sector start of this superblock */
63 __u64 recovery_offset
;/* sectors before this offset (from data_offset) have been recovered */
64 __u32 dev_number
; /* permanent identifier of this device - not role in raid */
65 __u32 cnt_corrected_read
; /* number of read errors that were corrected by re-writing */
66 __u8 device_uuid
[16]; /* user-space setable, ignored by kernel */
67 __u8 devflags
; /* per-device flags. Only one defined...*/
68 #define WriteMostly1 1 /* mask for writemostly flag in above */
69 __u8 pad2
[64-57]; /* set to 0 when writing */
71 /* array state information - 64 bytes */
72 __u64 utime
; /* 40 bits second, 24 btes microseconds */
73 __u64 events
; /* incremented when superblock updated */
74 __u64 resync_offset
; /* data before this offset (from data_offset) known to be in sync */
75 __u32 sb_csum
; /* checksum upto devs[max_dev] */
76 __u32 max_dev
; /* size of devs[] array to consider */
77 __u8 pad3
[64-32]; /* set to 0 when writing */
79 /* device state information. Indexed by dev_number.
81 * Note there are no per-device state flags. State information is rolled
82 * into the 'roles' value. If a device is spare or faulty, then it doesn't
83 * have a meaningful role.
85 __u16 dev_roles
[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
89 #define offsetof(t,f) ((int)&(((t*)0)->f))
91 static unsigned int calc_sb_1_csum(struct mdp_superblock_1
* sb
)
93 unsigned int disk_csum
, csum
;
94 unsigned long long newcsum
;
95 int size
= sizeof(*sb
) + __le32_to_cpu(sb
->max_dev
)*2;
96 unsigned int *isuper
= (unsigned int*)sb
;
99 /* make sure I can count... */
100 if (offsetof(struct mdp_superblock_1
,data_offset
) != 128 ||
101 offsetof(struct mdp_superblock_1
, utime
) != 192 ||
102 sizeof(struct mdp_superblock_1
) != 256) {
103 fprintf(stderr
, "WARNING - superblock isn't sized correctly\n");
106 disk_csum
= sb
->sb_csum
;
109 for (i
=0; size
>=4; size
-= 4 )
110 newcsum
+= __le32_to_cpu(*isuper
++);
113 newcsum
+= __le16_to_cpu(*(unsigned short*) isuper
);
115 csum
= (newcsum
& 0xffffffff) + (newcsum
>> 32);
116 sb
->sb_csum
= disk_csum
;
121 static void examine_super1(void *sbv
)
123 struct mdp_superblock_1
*sb
= sbv
;
130 printf(" Magic : %08x\n", __le32_to_cpu(sb
->magic
));
131 printf(" Version : %02d.%02d\n", 1, __le32_to_cpu(sb
->feature_map
));
132 printf(" Array UUID : ");
133 for (i
=0; i
<16; i
++) {
134 printf("%02x", sb
->set_uuid
[i
]);
135 if ((i
&3)==0 && i
!= 0) printf(":");
138 printf(" Name : %.32s\n", sb
->set_name
);
140 atime
= __le64_to_cpu(sb
->ctime
) & 0xFFFFFFFFFFULL
;
141 printf(" Creation Time : %.24s\n", ctime(&atime
));
142 c
=map_num(pers
, __le32_to_cpu(sb
->level
));
143 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
144 printf(" Raid Devices : %d\n", __le32_to_cpu(sb
->raid_disks
));
146 printf(" Device Size : %llu%s\n", (unsigned long long)sb
->data_size
, human_size(sb
->data_size
<<9));
148 printf(" Data Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb
->data_offset
));
149 if (sb
->super_offset
)
150 printf(" Super Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb
->super_offset
));
151 printf(" State : %s\n", (__le64_to_cpu(sb
->resync_offset
)+1)? "active":"clean");
152 printf(" Device UUID : ");
153 for (i
=0; i
<16; i
++) {
154 printf("%02x", sb
->set_uuid
[i
]);
155 if ((i
&3)==0 && i
!= 0) printf(":");
160 if (sb
->devflags
& WriteMostly1
)
161 printf(" write-mostly");
165 atime
= __le64_to_cpu(sb
->utime
) & 0xFFFFFFFFFFULL
;
166 printf(" Update Time : %.24s\n", ctime(&atime
));
168 if (calc_sb_1_csum(sb
) == sb
->sb_csum
)
169 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb
->sb_csum
));
171 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb
->sb_csum
),
172 __le32_to_cpu(calc_sb_1_csum(sb
)));
173 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb
->events
));
175 if (__le32_to_cpu(sb
->level
) == 5) {
176 c
= map_num(r5layout
, __le32_to_cpu(sb
->layout
));
177 printf(" Layout : %s\n", c
?c
:"-unknown-");
179 switch(__le32_to_cpu(sb
->level
)) {
183 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb
->chunksize
/2));
186 printf(" Rounding : %dK\n", __le32_to_cpu(sb
->chunksize
/2));
191 printf(" Array State : ");
192 for (d
=0; d
<__le32_to_cpu(sb
->raid_disks
); d
++) {
196 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
197 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
199 if (i
== __le32_to_cpu(sb
->dev_number
))
204 if (cnt
> 1) printf("?");
205 else if (cnt
== 1 && me
) printf("U");
206 else if (cnt
== 1) printf("u");
210 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
211 int role
= __le16_to_cpu(sb
->dev_roles
[i
]);
215 if (faulty
) printf(" %d failed", faulty
);
220 static void brief_examine_super1(void *sbv
)
222 struct mdp_superblock_1
*sb
= sbv
;
225 char *c
=map_num(pers
, __le32_to_cpu(sb
->level
));
227 printf("ARRAY /dev/?? level=%s metadata=1 num-devices=%d UUID=",
228 c
?c
:"-unknown-", sb
->raid_disks
);
229 for (i
=0; i
<16; i
++) {
230 printf("%02x", sb
->set_uuid
[i
]);
231 if ((i
&3)==0 && i
!= 0) printf(":");
236 static void detail_super1(void *sbv
)
238 struct mdp_superblock_1
*sb
= sbv
;
242 for (i
=0; i
<16; i
++) {
243 printf("%02x", sb
->set_uuid
[i
]);
244 if ((i
&3)==0 && i
!= 0) printf(":");
246 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb
->events
));
249 static void brief_detail_super1(void *sbv
)
251 struct mdp_superblock_1
*sb
= sbv
;
255 for (i
=0; i
<16; i
++) {
256 printf("%02x", sb
->set_uuid
[i
]);
257 if ((i
&3)==0 && i
!= 0) printf(":");
263 static void uuid_from_super1(int uuid
[4], void * sbv
)
265 struct mdp_superblock_1
*super
= sbv
;
266 char *cuuid
= (char*)uuid
;
269 cuuid
[i
] = super
->set_uuid
[i
];
272 static void getinfo_super1(struct mdinfo
*info
, void *sbv
)
274 struct mdp_superblock_1
*sb
= sbv
;
279 info
->array
.major_version
= 1;
280 info
->array
.minor_version
= __le32_to_cpu(sb
->feature_map
);
281 info
->array
.patch_version
= 0;
282 info
->array
.raid_disks
= __le32_to_cpu(sb
->raid_disks
);
283 info
->array
.level
= __le32_to_cpu(sb
->level
);
284 info
->array
.md_minor
= -1;
285 info
->array
.ctime
= __le64_to_cpu(sb
->ctime
);
287 info
->disk
.major
= 0;
288 info
->disk
.minor
= 0;
289 info
->disk
.number
= __le32_to_cpu(sb
->dev_number
);
290 if (__le32_to_cpu(sb
->dev_number
) >= __le32_to_cpu(sb
->max_dev
) ||
291 __le32_to_cpu(sb
->max_dev
) > 512)
294 role
= __le16_to_cpu(sb
->dev_roles
[__le32_to_cpu(sb
->dev_number
)]);
296 info
->disk
.raid_disk
= -1;
299 info
->disk
.state
= 2; /* spare: ACTIVE, not sync, not faulty */
302 info
->disk
.state
= 1; /* faulty */
305 info
->disk
.state
= 6; /* active and in sync */
306 info
->disk
.raid_disk
= role
;
308 info
->events
= __le64_to_cpu(sb
->events
);
310 memcpy(info
->uuid
, sb
->set_uuid
, 16);
312 for (i
=0; i
< __le32_to_cpu(sb
->max_dev
); i
++) {
313 role
= __le16_to_cpu(sb
->dev_roles
[i
]);
314 if (/*role == 0xFFFF || */role
< info
->array
.raid_disks
)
318 info
->array
.working_disks
= working
;
321 static int update_super1(struct mdinfo
*info
, void *sbv
, char *update
, char *devname
, int verbose
)
324 struct mdp_superblock_1
*sb
= sbv
;
326 if (strcmp(update
, "force")==0) {
327 sb
->events
= __cpu_to_le32(info
->events
);
328 switch(__le32_to_cpu(sb
->level
)) {
329 case 5: case 4: case 6:
330 /* need to force clean */
331 sb
->resync_offset
= ~0ULL;
334 if (strcmp(update
, "assemble")==0) {
335 int d
= info
->disk
.number
;
337 if (info
->disk
.state
== 6)
338 want
= __cpu_to_le32(info
->disk
.raid_disk
);
341 if (sb
->dev_roles
[d
] != want
) {
342 sb
->dev_roles
[d
] = want
;
347 if (strcmp(update
, "newdev") == 0) {
348 int d
= info
->disk
.number
;
349 memset(&sb
->disks
[d
], 0, sizeof(sb
->disks
[d
]));
350 sb
->disks
[d
].number
= d
;
351 sb
->disks
[d
].major
= info
->disk
.major
;
352 sb
->disks
[d
].minor
= info
->disk
.minor
;
353 sb
->disks
[d
].raid_disk
= info
->disk
.raid_disk
;
354 sb
->disks
[d
].state
= info
->disk
.state
;
355 sb
->this_disk
= sb
->disks
[d
];
358 if (strcmp(update
, "grow") == 0) {
359 sb
->raid_disks
= __cpu_to_le32(info
->array
.raid_disks
);
362 if (strcmp(update
, "resync") == 0) {
363 /* make sure resync happens */
364 sb
->resync_offset
= ~0ULL;
367 sb
->sb_csum
= calc_sb_1_csum(sb
);
372 static __u64
event_super1(void *sbv
)
374 struct mdp_superblock_1
*sb
= sbv
;
375 return __le64_to_cpu(sb
->events
);
378 static int init_super1(struct supertype
*st
, void **sbp
, mdu_array_info_t
*info
)
380 struct mdp_superblock_1
*sb
= malloc(1024);
384 if (info
->major_version
== -1)
385 /* zeroing superblock */
388 spares
= info
->working_disks
- info
->active_disks
;
389 if (info
->raid_disks
+ spares
> 384) {
390 fprintf(stderr
, Name
": too many devices requested: %d+%d > %d\n",
391 info
->raid_disks
, spares
, 384);
396 sb
->magic
= __cpu_to_le32(MD_SB_MAGIC
);
397 sb
->major_version
= __cpu_to_le32(1);
400 *(__u32
*)(sb
->set_uuid
) = random();
401 *(__u32
*)(sb
->set_uuid
+4) = random();
402 *(__u32
*)(sb
->set_uuid
+8) = random();
403 *(__u32
*)(sb
->set_uuid
+12) = random();
407 sb
->ctime
= __cpu_to_le64((unsigned long long)time(0));
408 sb
->level
= __cpu_to_le32(info
->level
);
409 sb
->layout
= __cpu_to_le32(info
->layout
);
410 sb
->size
= __cpu_to_le64(info
->size
*2ULL);
411 sb
->chunksize
= __cpu_to_le32(info
->chunk_size
>>9);
412 sb
->raid_disks
= __cpu_to_le32(info
->raid_disks
);
414 sb
->data_offset
= __cpu_to_le64(0);
415 sb
->data_size
= __cpu_to_le64(0);
416 sb
->super_offset
= __cpu_to_le64(0);
417 sb
->recovery_offset
= __cpu_to_le64(0);
419 sb
->utime
= sb
->ctime
;
420 sb
->events
= __cpu_to_le64(1);
421 if (info
->state
& (1<<MD_SB_CLEAN
))
422 sb
->resync_offset
= ~0ULL;
424 sb
->resync_offset
= 0;
425 sb
->max_dev
= __cpu_to_le32((1024- sizeof(struct mdp_superblock_1
))/
426 sizeof(sb
->dev_roles
[0]));
427 memset(sb
->pad3
, 0, sizeof(sb
->pad3
));
429 memset(sb
->dev_roles
, 0xff, 1024 - sizeof(struct mdp_superblock_1
));
435 /* Add a device to the superblock being created */
436 static void add_to_super1(void *sbv
, mdu_disk_info_t
*dk
)
438 struct mdp_superblock_1
*sb
= sbv
;
439 __u16
*rp
= sb
->dev_roles
+ dk
->number
;
440 if ((dk
->state
& 6) == 6) /* active, sync */
441 *rp
= __cpu_to_le16(dk
->raid_disk
);
442 else if ((dk
->state
& ~2) == 0) /* active or idle -> spare */
448 static int store_super1(struct supertype
*st
, int fd
, void *sbv
)
450 struct mdp_superblock_1
*sb
= sbv
;
451 unsigned long long sb_offset
;
455 if (ioctl(fd
, BLKGETSIZE
, &size
))
463 * Calculate the position of the superblock.
464 * It is always aligned to a 4K boundary and
465 * depending on minor_version, it can be:
466 * 0: At least 8K, but less than 12K, from end of device
467 * 1: At start of device
468 * 2: 4K from start of device.
470 switch(st
->minor_version
) {
474 sb_offset
&= ~(4*2-1);
488 if (sb_offset
!= __le64_to_cpu(sb
->super_offset
) &&
489 0 != __le64_to_cpu(sb
->super_offset
)
491 fprintf(stderr
, Name
": internal error - sb_offset is wrong\n");
495 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL)
498 sbsize
= sizeof(*sb
) + 2 * __le32_to_cpu(sb
->max_dev
);
500 if (write(fd
, sb
, sbsize
) != sbsize
)
507 static int load_super1(struct supertype
*st
, int fd
, void **sbp
, char *devname
);
509 static int write_init_super1(struct supertype
*st
, void *sbv
, mdu_disk_info_t
*dinfo
, char *devname
)
511 struct mdp_superblock_1
*sb
= sbv
;
512 struct mdp_superblock_1
*refsb
= NULL
;
513 int fd
= open(devname
, O_RDWR
| O_EXCL
);
522 fprintf(stderr
, Name
": Failed to open %s to write superblock\n",
527 sb
->dev_number
= __cpu_to_le32(dinfo
->number
);
528 if (dinfo
->state
& (1<<MD_DISK_WRITEMOSTLY
))
529 sb
->devflags
|= WriteMostly1
;
531 if ((rfd
= open("/dev/urandom", O_RDONLY
)) < 0 ||
532 read(rfd
, sb
->device_uuid
, 16) != 16) {
533 *(__u32
*)(sb
->device_uuid
) = random();
534 *(__u32
*)(sb
->device_uuid
+4) = random();
535 *(__u32
*)(sb
->device_uuid
+8) = random();
536 *(__u32
*)(sb
->device_uuid
+12) = random();
538 if (rfd
>= 0) close(rfd
);
541 if (load_super1(st
, fd
, (void**)&refsb
, NULL
)==0) {
542 memcpy(sb
->device_uuid
, refsb
->device_uuid
, 16);
543 if (memcmp(sb
->set_uuid
, refsb
->set_uuid
, 16)==0) {
544 /* same array, so preserve events and dev_number */
545 sb
->events
= refsb
->events
;
546 sb
->dev_number
= refsb
->dev_number
;
551 if (ioctl(fd
, BLKGETSIZE
, &size
)) {
563 * Calculate the position of the superblock.
564 * It is always aligned to a 4K boundary and
565 * depending on minor_version, it can be:
566 * 0: At least 8K, but less than 12K, from end of device
567 * 1: At start of device
568 * 2: 4K from start of device.
570 switch(st
->minor_version
) {
574 sb_offset
&= ~(4*2-1);
575 sb
->super_offset
= __cpu_to_le64(sb_offset
);
576 sb
->data_offset
= __cpu_to_le64(0);
577 sb
->data_size
= sb
->super_offset
;
580 sb
->super_offset
= __cpu_to_le64(0);
581 sb
->data_offset
= __cpu_to_le64(2);
582 sb
->data_size
= __cpu_to_le64(size
- 2);
586 sb
->super_offset
= __cpu_to_le64(sb_offset
);
587 sb
->data_offset
= __cpu_to_le64(sb_offset
+2);
588 sb
->data_size
= __cpu_to_le64(size
- 4*2 - 2);
595 sb
->sb_csum
= calc_sb_1_csum(sb
);
596 rv
= store_super1(st
, fd
, sb
);
598 fprintf(stderr
, Name
": failed to write superblock to %s\n", devname
);
603 static int compare_super1(void **firstp
, void *secondv
)
607 * 0 same, or first was empty, and second was copied
608 * 1 second had wrong number
612 struct mdp_superblock_1
*first
= *firstp
;
613 struct mdp_superblock_1
*second
= secondv
;
615 if (second
->magic
!= __cpu_to_le32(MD_SB_MAGIC
))
617 if (second
->major_version
!= __cpu_to_le32(1))
621 first
= malloc(1024);
622 memcpy(first
, second
, 1024);
626 if (memcmp(first
->set_uuid
, second
->set_uuid
, 16)!= 0)
629 if (first
->ctime
!= second
->ctime
||
630 first
->level
!= second
->level
||
631 first
->layout
!= second
->layout
||
632 first
->size
!= second
->size
||
633 first
->chunksize
!= second
->chunksize
||
634 first
->raid_disks
!= second
->raid_disks
)
639 static int load_super1(struct supertype
*st
, int fd
, void **sbp
, char *devname
)
642 unsigned long long sb_offset
;
643 struct mdp_superblock_1
*super
;
647 if (st
->ss
== NULL
) {
650 /* guess... choose latest ctime */
652 for (st
->minor_version
= 0; st
->minor_version
<= 2 ; st
->minor_version
++) {
653 switch(load_super1(st
, fd
, sbp
, devname
)) {
654 case 0: super
= *sbp
;
655 if (bestvers
== -1 ||
656 bestctime
< __le64_to_cpu(super
->ctime
)) {
657 bestvers
= st
->minor_version
;
658 bestctime
= __le64_to_cpu(super
->ctime
);
663 case 1: st
->ss
= NULL
; return 1; /*bad device */
664 case 2: break; /* bad, try next */
667 if (bestvers
!= -1) {
669 st
->minor_version
= bestvers
;
672 rv
= load_super1(st
, fd
, sbp
, devname
);
673 if (rv
) st
->ss
= NULL
;
679 if (ioctl(fd
, BLKGETSIZE
, &size
)) {
681 fprintf(stderr
, Name
": cannot find device size for %s: %s\n",
682 devname
, strerror(errno
));
688 fprintf(stderr
, Name
": %s is too small for md: size is %lu sectors.\n",
694 * Calculate the position of the superblock.
695 * It is always aligned to a 4K boundary and
696 * depeding on minor_version, it can be:
697 * 0: At least 8K, but less than 12K, from end of device
698 * 1: At start of device
699 * 2: 4K from start of device.
701 switch(st
->minor_version
) {
705 sb_offset
&= ~(4*2-1);
717 ioctl(fd
, BLKFLSBUF
, 0); /* make sure we read current data */
720 if (lseek64(fd
, sb_offset
<< 9, 0)< 0LL) {
722 fprintf(stderr
, Name
": Cannot seek to superblock on %s: %s\n",
723 devname
, strerror(errno
));
727 super
= malloc(1024);
729 if (read(fd
, super
, 1024) != 1024) {
731 fprintf(stderr
, Name
": Cannot read superblock on %s\n",
737 if (__le32_to_cpu(super
->magic
) != MD_SB_MAGIC
) {
739 fprintf(stderr
, Name
": No super block found on %s (Expected magic %08x, got %08x)\n",
740 devname
, MD_SB_MAGIC
, __le32_to_cpu(super
->magic
));
745 if (__le32_to_cpu(super
->major_version
) != 1) {
747 fprintf(stderr
, Name
": Cannot interpret superblock on %s - version is %d\n",
748 devname
, __le32_to_cpu(super
->major_version
));
752 if (__le64_to_cpu(super
->super_offset
) != sb_offset
) {
754 fprintf(stderr
, Name
": No superblock found on %s (super_offset is wrong)\n",
764 static struct supertype
*match_metadata_desc1(char *arg
)
766 struct supertype
*st
= malloc(sizeof(*st
));
771 if (strcmp(arg
, "1") == 0 ||
772 strcmp(arg
, "1.0") == 0) {
773 st
->minor_version
= 0;
776 if (strcmp(arg
, "1.1") == 0) {
777 st
->minor_version
= 1;
780 if (strcmp(arg
, "1.2") == 0) {
781 st
->minor_version
= 2;
789 static __u64
avail_size1(__u64 devsize
)
794 return (devsize
- 8*2 ) & ~(4*2-1);
797 struct superswitch super1
= {
799 .examine_super
= examine_super1
,
800 .brief_examine_super
= brief_examine_super1
,
801 .detail_super
= detail_super1
,
802 .brief_detail_super
= brief_detail_super1
,
804 .uuid_from_super
= uuid_from_super1
,
805 .getinfo_super
= getinfo_super1
,
806 .update_super
= update_super1
,
807 .event_super
= event_super1
,
808 .init_super
= init_super1
,
809 .add_to_super
= add_to_super1
,
810 .store_super
= store_super1
,
811 .write_init_super
= write_init_super1
,
812 .compare_super
= compare_super1
,
813 .load_super
= load_super1
,
814 .match_metadata_desc
= match_metadata_desc1
,
815 .avail_size
= avail_size1
,
817 #if __BYTE_ORDER == BIG_ENDIAN