2 * mdadm - Intel(R) Matrix Storage Manager Support
4 * Copyright (C) 2002-2007 Intel Corporation
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
26 /* MPB == Metadata Parameter Block */
27 #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
28 #define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
29 #define MPB_VERSION_RAID0 "1.0.00"
30 #define MPB_VERSION_RAID1 "1.1.00"
31 #define MPB_VERSION_RAID5 "1.2.02"
32 #define MAX_SIGNATURE_LENGTH 32
33 #define MAX_RAID_SERIAL_LEN 16
34 #define MPB_SECTOR_CNT 418
35 #define IMSM_RESERVED_SECTORS 4096
37 /* Disk configuration info. */
38 #define IMSM_MAX_DEVICES 255
40 __u8 serial
[MAX_RAID_SERIAL_LEN
];/* 0xD8 - 0xE7 ascii serial number */
41 __u32 total_blocks
; /* 0xE8 - 0xEB total blocks */
42 __u32 scsi_id
; /* 0xEC - 0xEF scsi ID */
43 __u32 status
; /* 0xF0 - 0xF3 */
44 #define SPARE_DISK 0x01 /* Spare */
45 #define CONFIGURED_DISK 0x02 /* Member of some RaidDev */
46 #define FAILED_DISK 0x04 /* Permanent failure */
47 #define USABLE_DISK 0x08 /* Fully usable unless FAILED_DISK is set */
49 #define IMSM_DISK_FILLERS 5
50 __u32 filler
[IMSM_DISK_FILLERS
]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
53 /* RAID map configuration infos. */
55 __u32 pba_of_lba0
; /* start address of partition */
56 __u32 blocks_per_member
;/* blocks per member */
57 __u32 num_data_stripes
; /* number of data stripes */
58 __u16 blocks_per_strip
;
59 __u8 map_state
; /* Normal, Uninitialized, Degraded, Failed */
60 #define IMSM_T_STATE_NORMAL 0
61 #define IMSM_T_STATE_UNINITIALIZED 1
62 #define IMSM_T_STATE_DEGRADED 2 /* FIXME: is this correct? */
63 #define IMSM_T_STATE_FAILED 3 /* FIXME: is this correct? */
65 #define IMSM_T_RAID0 0
66 #define IMSM_T_RAID1 1
67 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
68 __u8 num_members
; /* number of member disks */
70 __u32 filler
[7]; /* expansion area */
71 __u32 disk_ord_tbl
[1]; /* disk_ord_tbl[num_members],
73 } __attribute__ ((packed
));
77 __u8 migr_state
; /* Normal or Migrating */
78 __u8 migr_type
; /* Initializing, Rebuilding, ... */
82 struct imsm_map map
[1];
83 /* here comes another one if migr_state */
84 } __attribute__ ((packed
));
87 __u8 volume
[MAX_RAID_SERIAL_LEN
];
90 __u32 status
; /* Persistent RaidDev status */
91 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
92 #define IMSM_DEV_FILLERS 12
93 __u32 filler
[IMSM_DEV_FILLERS
];
95 } __attribute__ ((packed
));
98 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
99 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
100 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
101 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
102 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
103 __u32 reserved
[2]; /* 0x30 - 0x37 */
104 __u8 num_disks
; /* 0x38 Number of configured disks */
105 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
106 __u8 fill
[2]; /* 0x3A - 0x3B */
107 #define IMSM_FILLERS 39
108 __u32 filler
[IMSM_FILLERS
]; /* 0x3C - 0xD7 RAID_MPB_FILLERS */
109 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
110 /* here comes imsm_dev[num_raid_devs] */
111 } __attribute__ ((packed
));
114 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
117 static unsigned int sector_count(__u32 bytes
)
119 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
122 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
124 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
127 /* internal representation of IMSM metadata */
130 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
131 struct imsm_super
*anchor
; /* immovable parameters */
133 size_t len
; /* size of the 'buf' allocation */
134 int updates_pending
; /* count of pending updates for mdmon */
135 int creating_imsm
; /* flag to indicate container creation */
136 int current_vol
; /* index of raid device undergoing creation */
137 #define IMSM_MAX_DISKS 6
138 struct imsm_disk
*disk_tbl
[IMSM_MAX_DISKS
];
139 #define IMSM_MAX_RAID_DEVS 2
140 struct imsm_dev
*dev_tbl
[IMSM_MAX_RAID_DEVS
];
144 __u8 serial
[MAX_RAID_SERIAL_LEN
];
152 unsigned long long start
, size
;
155 /* definition of messages passed to imsm_process_update */
156 enum imsm_update_type
{
157 update_activate_spare
,
161 struct imsm_update_activate_spare
{
162 enum imsm_update_type type
;
166 struct imsm_update_activate_spare
*next
;
169 struct imsm_update_create_array
{
170 enum imsm_update_type type
;
175 static int imsm_env_devname_as_serial(void)
177 char *val
= getenv("IMSM_DEVNAME_AS_SERIAL");
179 if (val
&& atoi(val
) == 1)
186 static struct supertype
*match_metadata_desc_imsm(char *arg
)
188 struct supertype
*st
;
190 if (strcmp(arg
, "imsm") != 0 &&
191 strcmp(arg
, "default") != 0
195 st
= malloc(sizeof(*st
));
196 memset(st
, 0, sizeof(*st
));
197 st
->ss
= &super_imsm
;
198 st
->max_devs
= IMSM_MAX_DEVICES
;
199 st
->minor_version
= 0;
204 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
206 return &mpb
->sig
[MPB_SIG_LEN
];
209 /* retrieve a disk directly from the anchor when the anchor is known to be
210 * up-to-date, currently only at load time
212 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
214 if (index
>= mpb
->num_disks
)
216 return &mpb
->disk
[index
];
219 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
221 if (index
>= super
->anchor
->num_disks
)
223 return super
->disk_tbl
[index
];
226 /* generate a checksum directly from the anchor when the anchor is known to be
227 * up-to-date, currently only at load or write_super after coalescing
229 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
231 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
232 __u32
*p
= (__u32
*) mpb
;
236 sum
+= __le32_to_cpu(*p
++);
238 return sum
- __le32_to_cpu(mpb
->check_sum
);
241 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
)
243 size_t size
= sizeof(*dev
);
245 /* each map has disk_ord_tbl[num_members - 1] additional space */
246 size
+= sizeof(__u32
) * (dev
->vol
.map
[0].num_members
- 1);
248 /* migrating means an additional map */
249 if (dev
->vol
.migr_state
) {
250 size
+= sizeof(struct imsm_map
);
251 size
+= sizeof(__u32
) * (dev
->vol
.map
[1].num_members
- 1);
257 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
263 if (index
>= mpb
->num_raid_devs
)
266 /* devices start after all disks */
267 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
269 for (i
= 0; i
<= index
; i
++)
271 return _mpb
+ offset
;
273 offset
+= sizeof_imsm_dev(_mpb
+ offset
);
278 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
280 if (index
>= super
->anchor
->num_raid_devs
)
282 return super
->dev_tbl
[index
];
285 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
287 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
289 /* top byte is 'special' */
290 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
293 static int get_imsm_raid_level(struct imsm_map
*map
)
295 if (map
->raid_level
== 1) {
296 if (map
->num_members
== 2)
302 return map
->raid_level
;
305 static int cmp_extent(const void *av
, const void *bv
)
307 const struct extent
*a
= av
;
308 const struct extent
*b
= bv
;
309 if (a
->start
< b
->start
)
311 if (a
->start
> b
->start
)
316 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
318 /* find a list of used extents on the given physical device */
319 struct imsm_disk
*disk
;
320 struct extent
*rv
, *e
;
324 disk
= get_imsm_disk(super
, dl
->index
);
328 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
329 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
330 struct imsm_map
*map
= dev
->vol
.map
;
332 for (j
= 0; j
< map
->num_members
; j
++) {
333 __u32 index
= get_imsm_disk_idx(map
, j
);
335 if (index
== dl
->index
)
339 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
344 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
345 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
346 struct imsm_map
*map
= dev
->vol
.map
;
348 for (j
= 0; j
< map
->num_members
; j
++) {
349 __u32 index
= get_imsm_disk_idx(map
, j
);
351 if (index
== dl
->index
) {
352 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
353 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
358 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
360 e
->start
= __le32_to_cpu(disk
->total_blocks
) -
361 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
367 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
371 struct imsm_map
*map
= dev
->vol
.map
;
374 printf("[%s]:\n", dev
->volume
);
375 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
376 printf(" Members : %d\n", map
->num_members
);
377 for (slot
= 0; slot
< map
->num_members
; slot
++)
378 if (index
== get_imsm_disk_idx(map
, slot
))
380 if (slot
< map
->num_members
)
381 printf(" This Slot : %d\n", slot
);
383 printf(" This Slot : ?\n");
384 sz
= __le32_to_cpu(dev
->size_high
);
386 sz
+= __le32_to_cpu(dev
->size_low
);
387 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
388 human_size(sz
* 512));
389 sz
= __le32_to_cpu(map
->blocks_per_member
);
390 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
391 human_size(sz
* 512));
392 printf(" Sector Offset : %u\n",
393 __le32_to_cpu(map
->pba_of_lba0
));
394 printf(" Num Stripes : %u\n",
395 __le32_to_cpu(map
->num_data_stripes
));
396 printf(" Chunk Size : %u KiB\n",
397 __le16_to_cpu(map
->blocks_per_strip
) / 2);
398 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
399 printf(" Migrate State : %s\n", dev
->vol
.migr_state
? "migrating" : "idle");
400 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
401 printf(" Map State : %s\n", map_state_str
[map
->map_state
]);
404 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
406 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
407 char str
[MAX_RAID_SERIAL_LEN
];
415 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
416 printf(" Disk%02d Serial : %s\n", index
, str
);
417 s
= __le32_to_cpu(disk
->status
);
418 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
419 s
&CONFIGURED_DISK
? " active" : "",
420 s
&FAILED_DISK
? " failed" : "",
421 s
&USABLE_DISK
? " usable" : "");
422 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
423 sz
= __le32_to_cpu(disk
->total_blocks
) -
424 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
425 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
426 human_size(sz
* 512));
429 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
431 struct intel_super
*super
= st
->sb
;
432 struct imsm_super
*mpb
= super
->anchor
;
433 char str
[MAX_SIGNATURE_LENGTH
];
437 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
438 printf(" Magic : %s\n", str
);
439 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
440 printf(" Version : %s\n", get_imsm_version(mpb
));
441 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
442 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
443 sum
= __le32_to_cpu(mpb
->check_sum
);
444 printf(" Checksum : %08x %s\n", sum
,
445 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
446 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
447 printf(" Disks : %d\n", mpb
->num_disks
);
448 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
449 print_imsm_disk(mpb
, super
->disks
->index
);
450 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
451 print_imsm_dev(__get_imsm_dev(mpb
, i
), super
->disks
->index
);
452 for (i
= 0; i
< mpb
->num_disks
; i
++) {
453 if (i
== super
->disks
->index
)
455 print_imsm_disk(mpb
, i
);
459 static void brief_examine_super_imsm(struct supertype
*st
)
461 struct intel_super
*super
= st
->sb
;
463 printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
464 __le32_to_cpu(super
->anchor
->family_num
));
467 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
469 printf("%s\n", __FUNCTION__
);
472 static void brief_detail_super_imsm(struct supertype
*st
)
474 printf("%s\n", __FUNCTION__
);
478 static int match_home_imsm(struct supertype
*st
, char *homehost
)
480 printf("%s\n", __FUNCTION__
);
485 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
487 printf("%s\n", __FUNCTION__
);
492 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
494 __u8
*v
= get_imsm_version(mpb
);
495 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
496 char major
[] = { 0, 0, 0 };
497 char minor
[] = { 0 ,0, 0 };
498 char patch
[] = { 0, 0, 0 };
499 char *ver_parse
[] = { major
, minor
, patch
};
503 while (*v
!= '\0' && v
< end
) {
504 if (*v
!= '.' && j
< 2)
505 ver_parse
[i
][j
++] = *v
;
513 *m
= strtol(minor
, NULL
, 0);
514 *p
= strtol(patch
, NULL
, 0);
518 static int imsm_level_to_layout(int level
)
526 return ALGORITHM_LEFT_SYMMETRIC
;
528 return 0x102; //FIXME is this correct?
533 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
535 struct intel_super
*super
= st
->sb
;
536 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
537 struct imsm_map
*map
= &dev
->vol
.map
[0];
539 info
->container_member
= super
->current_vol
;
540 info
->array
.raid_disks
= map
->num_members
;
541 info
->array
.level
= get_imsm_raid_level(map
);
542 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
543 info
->array
.md_minor
= -1;
544 info
->array
.ctime
= 0;
545 info
->array
.utime
= 0;
546 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
548 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
549 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
551 info
->disk
.major
= 0;
552 info
->disk
.minor
= 0;
554 sprintf(info
->text_version
, "/%s/%d",
555 devnum2devname(st
->container_dev
),
556 info
->container_member
);
560 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
562 struct intel_super
*super
= st
->sb
;
563 struct imsm_disk
*disk
;
566 if (super
->current_vol
>= 0) {
567 getinfo_super_imsm_volume(st
, info
);
570 info
->array
.raid_disks
= super
->anchor
->num_disks
;
571 info
->array
.level
= LEVEL_CONTAINER
;
572 info
->array
.layout
= 0;
573 info
->array
.md_minor
= -1;
574 info
->array
.ctime
= 0; /* N/A for imsm */
575 info
->array
.utime
= 0;
576 info
->array
.chunk_size
= 0;
578 info
->disk
.major
= 0;
579 info
->disk
.minor
= 0;
580 info
->disk
.raid_disk
= -1;
581 info
->reshape_active
= 0;
582 strcpy(info
->text_version
, "imsm");
583 info
->disk
.number
= -1;
584 info
->disk
.state
= 0;
587 disk
= get_imsm_disk(super
, super
->disks
->index
);
589 info
->disk
.number
= -1;
590 info
->disk
.raid_disk
= -1;
593 info
->disk
.number
= super
->disks
->index
;
594 info
->disk
.raid_disk
= super
->disks
->index
;
595 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
596 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
597 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
598 s
= __le32_to_cpu(disk
->status
);
599 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
600 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
601 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
605 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
606 char *update
, char *devname
, int verbose
,
607 int uuid_set
, char *homehost
)
611 /* For 'assemble' and 'force' we need to return non-zero if any
612 * change was made. For others, the return value is ignored.
613 * Update options are:
614 * force-one : This device looks a bit old but needs to be included,
615 * update age info appropriately.
616 * assemble: clear any 'faulty' flag to allow this device to
618 * force-array: Array is degraded but being forced, mark it clean
619 * if that will be needed to assemble it.
621 * newdev: not used ????
622 * grow: Array has gained a new device - this is currently for
624 * resync: mark as dirty so a resync will happen.
625 * name: update the name - preserving the homehost
627 * Following are not relevant for this imsm:
628 * sparc2.2 : update from old dodgey metadata
629 * super-minor: change the preferred_minor number
630 * summaries: update redundant counters.
631 * uuid: Change the uuid of the array to match watch is given
632 * homehost: update the recorded homehost
633 * _reshape_progress: record new reshape_progress position.
636 //struct intel_super *super = st->sb;
637 //struct imsm_super *mpb = super->mpb;
639 if (strcmp(update
, "grow") == 0) {
641 if (strcmp(update
, "resync") == 0) {
642 /* dev->vol.dirty = 1; */
645 /* IMSM has no concept of UUID or homehost */
650 static size_t disks_to_mpb_size(int disks
)
654 size
= sizeof(struct imsm_super
);
655 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
656 size
+= 2 * sizeof(struct imsm_dev
);
657 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
658 size
+= (4 - 2) * sizeof(struct imsm_map
);
659 /* 4 possible disk_ord_tbl's */
660 size
+= 4 * (disks
- 1) * sizeof(__u32
);
665 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
667 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
670 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
673 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
677 * 0 same, or first was empty, and second was copied
678 * 1 second had wrong number
682 struct intel_super
*first
= st
->sb
;
683 struct intel_super
*sec
= tst
->sb
;
691 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
693 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
695 if (first
->anchor
->mpb_size
!= sec
->anchor
->mpb_size
)
697 if (first
->anchor
->check_sum
!= sec
->anchor
->check_sum
)
703 static void fd2devname(int fd
, char *name
)
712 if (fstat(fd
, &st
) != 0)
714 sprintf(path
, "/sys/dev/block/%d:%d",
715 major(st
.st_rdev
), minor(st
.st_rdev
));
717 rv
= readlink(path
, dname
, sizeof(dname
));
722 nm
= strrchr(dname
, '/');
724 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
728 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
730 static int imsm_read_serial(int fd
, char *devname
,
731 __u8 serial
[MAX_RAID_SERIAL_LEN
])
733 unsigned char scsi_serial
[255];
738 memset(scsi_serial
, 0, sizeof(scsi_serial
));
740 if (imsm_env_devname_as_serial()) {
741 char name
[MAX_RAID_SERIAL_LEN
];
743 fd2devname(fd
, name
);
744 strcpy((char *) serial
, name
);
748 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
753 Name
": Failed to retrieve serial for %s\n",
758 rsp_len
= scsi_serial
[3];
759 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
760 if (!isspace(scsi_serial
[4 + i
]))
761 serial
[cnt
++] = scsi_serial
[4 + i
];
762 if (cnt
== MAX_RAID_SERIAL_LEN
)
766 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
772 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
776 struct imsm_disk
*disk
;
780 dl
= malloc(sizeof(*dl
));
781 disk
= malloc(sizeof(*disk
));
785 Name
": failed to allocate disk buffer for %s\n",
793 memset(dl
, 0, sizeof(*dl
));
794 memset(disk
, 0, sizeof(*disk
));
797 dl
->major
= major(stb
.st_rdev
);
798 dl
->minor
= minor(stb
.st_rdev
);
799 dl
->next
= super
->disks
;
800 dl
->fd
= keep_fd
? fd
: -1;
801 dl
->devname
= devname
? strdup(devname
) : NULL
;
804 rv
= imsm_read_serial(fd
, devname
, dl
->serial
);
809 /* look up this disk's index */
810 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
811 struct imsm_disk
*disk_iter
;
813 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
815 if (memcmp(disk_iter
->serial
, dl
->serial
,
816 MAX_RAID_SERIAL_LEN
) == 0) {
818 super
->disk_tbl
[i
] = disk
;
824 if (i
== super
->anchor
->num_disks
) {
827 Name
": failed to match serial \'%s\' for %s\n",
828 dl
->serial
, devname
);
836 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
842 for (i
= 0; i
< src
->vol
.map
[0].num_members
; i
++)
843 dest
->vol
.map
[0].disk_ord_tbl
[i
] = src
->vol
.map
[0].disk_ord_tbl
[i
];
845 if (!src
->vol
.migr_state
)
848 dest
->vol
.map
[1] = src
->vol
.map
[1];
849 for (i
= 0; i
< src
->vol
.map
[1].num_members
; i
++)
850 dest
->vol
.map
[1].disk_ord_tbl
[i
] = src
->vol
.map
[1].disk_ord_tbl
[i
];
853 static int parse_raid_devices(struct intel_super
*super
)
856 struct imsm_dev
*dev_new
;
859 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
860 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
862 len
= sizeof_imsm_dev(dev_iter
);
863 dev_new
= malloc(len
);
866 imsm_copy_dev(dev_new
, dev_iter
);
867 super
->dev_tbl
[i
] = dev_new
;
873 /* load_imsm_mpb - read matrix metadata
874 * allocates super->mpb to be freed by free_super
876 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
878 unsigned long long dsize
;
879 unsigned long long sectors
;
881 struct imsm_super
*anchor
;
885 get_dev_size(fd
, NULL
, &dsize
);
887 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
890 Name
": Cannot seek to anchor block on %s: %s\n",
891 devname
, strerror(errno
));
895 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
898 Name
": Failed to allocate imsm anchor buffer"
899 " on %s\n", devname
);
902 if (read(fd
, anchor
, 512) != 512) {
905 Name
": Cannot read anchor block on %s: %s\n",
906 devname
, strerror(errno
));
911 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
914 Name
": no IMSM anchor on %s\n", devname
);
919 super
->len
= __le32_to_cpu(anchor
->mpb_size
);
920 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
921 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
924 Name
": unable to allocate %zu byte mpb buffer\n",
929 memcpy(super
->buf
, anchor
, 512);
931 sectors
= mpb_sectors(anchor
) - 1;
934 rc
= load_imsm_disk(fd
, super
, devname
, 0);
936 rc
= parse_raid_devices(super
);
940 /* read the extended mpb */
941 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
944 Name
": Cannot seek to extended mpb on %s: %s\n",
945 devname
, strerror(errno
));
949 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
952 Name
": Cannot read extended mpb on %s: %s\n",
953 devname
, strerror(errno
));
957 check_sum
= __gen_imsm_checksum(super
->anchor
);
958 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
961 Name
": IMSM checksum %x != %x on %s\n",
962 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
967 rc
= load_imsm_disk(fd
, super
, devname
, 0);
969 rc
= parse_raid_devices(super
);
973 static void free_imsm_disks(struct intel_super
*super
)
977 while (super
->disks
) {
978 struct dl
*d
= super
->disks
;
980 super
->disks
= d
->next
;
987 for (i
= 0; i
< IMSM_MAX_DISKS
; i
++)
988 if (super
->disk_tbl
[i
]) {
989 free(super
->disk_tbl
[i
]);
990 super
->disk_tbl
[i
] = NULL
;
994 static void free_imsm(struct intel_super
*super
)
1000 free_imsm_disks(super
);
1001 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1002 if (super
->dev_tbl
[i
])
1003 free(super
->dev_tbl
[i
]);
1008 static void free_super_imsm(struct supertype
*st
)
1010 struct intel_super
*super
= st
->sb
;
1019 static struct intel_super
*alloc_super(int creating_imsm
)
1021 struct intel_super
*super
= malloc(sizeof(*super
));
1024 memset(super
, 0, sizeof(*super
));
1025 super
->creating_imsm
= creating_imsm
;
1026 super
->current_vol
= -1;
1033 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1034 char *devname
, int keep_fd
)
1037 struct intel_super
*super
;
1038 struct mdinfo
*sd
, *best
= NULL
;
1045 /* check if this disk is a member of an active array */
1046 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1050 if (sra
->array
.major_version
!= -1 ||
1051 sra
->array
.minor_version
!= -2 ||
1052 strcmp(sra
->text_version
, "imsm") != 0)
1055 super
= alloc_super(0);
1059 /* find the most up to date disk in this array */
1060 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1061 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1062 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1067 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1071 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1072 if (!best
|| gen
> bestgen
) {
1087 /* load the most up to date anchor */
1088 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1089 dfd
= dev_open(nm
, O_RDONLY
);
1094 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1101 /* reset the disk list */
1102 free_imsm_disks(super
);
1104 /* populate disk list */
1105 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1106 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1107 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1112 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1117 if (st
->subarray
[0]) {
1118 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1119 super
->current_vol
= atoi(st
->subarray
);
1125 if (st
->ss
== NULL
) {
1126 st
->ss
= &super_imsm
;
1127 st
->minor_version
= 0;
1128 st
->max_devs
= IMSM_MAX_DEVICES
;
1129 st
->container_dev
= fd2devnum(fd
);
1136 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1138 struct intel_super
*super
;
1142 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1145 if (st
->subarray
[0])
1146 return 1; /* FIXME */
1148 super
= alloc_super(0);
1151 Name
": malloc of %zu failed.\n",
1156 rv
= load_imsm_mpb(fd
, super
, devname
);
1161 Name
": Failed to load all information "
1162 "sections on %s\n", devname
);
1168 if (st
->ss
== NULL
) {
1169 st
->ss
= &super_imsm
;
1170 st
->minor_version
= 0;
1171 st
->max_devs
= IMSM_MAX_DEVICES
;
1177 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1179 if (info
->level
== 1)
1181 return info
->chunk_size
>> 9;
1184 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1188 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1189 if (info
->level
== 1)
1195 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1197 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1200 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1201 unsigned long long size
, char *name
,
1202 char *homehost
, int *uuid
)
1204 /* We are creating a volume inside a pre-existing container.
1205 * so st->sb is already set.
1207 struct intel_super
*super
= st
->sb
;
1208 struct imsm_super
*mpb
= super
->anchor
;
1209 struct imsm_dev
*dev
;
1210 struct imsm_vol
*vol
;
1211 struct imsm_map
*map
;
1212 int idx
= mpb
->num_raid_devs
;
1214 unsigned long long array_blocks
;
1216 size_t size_old
, size_new
;
1218 if (mpb
->num_raid_devs
>= 2) {
1219 fprintf(stderr
, Name
": This imsm-container already has the "
1220 "maximum of 2 volumes\n");
1224 /* ensure the mpb is large enough for the new data */
1225 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1226 size_new
= disks_to_mpb_size(info
->nr_disks
);
1227 if (size_new
> size_old
) {
1229 size_t size_round
= ROUND_UP(size_new
, 512);
1231 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1232 fprintf(stderr
, Name
": could not allocate new mpb\n");
1235 memcpy(mpb_new
, mpb
, size_old
);
1238 super
->anchor
= mpb_new
;
1239 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1240 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1242 super
->current_vol
= idx
;
1243 sprintf(st
->subarray
, "%d", idx
);
1244 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1246 fprintf(stderr
, Name
": could not allocate raid device\n");
1249 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1250 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1251 info
->layout
, info
->chunk_size
,
1253 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1254 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1255 dev
->status
= __cpu_to_le32(0);
1256 dev
->reserved_blocks
= __cpu_to_le32(0);
1258 vol
->migr_state
= 0;
1261 for (i
= 0; i
< idx
; i
++) {
1262 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1263 struct imsm_map
*pmap
= &prev
->vol
.map
[0];
1265 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1266 offset
+= IMSM_RESERVED_SECTORS
;
1269 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1270 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1271 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1272 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1273 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1274 IMSM_T_STATE_NORMAL
;
1276 if (info
->level
== 1 && info
->raid_disks
> 2) {
1277 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1278 "in a raid1 volume\n");
1281 if (info
->level
== 10)
1282 map
->raid_level
= 1;
1284 map
->raid_level
= info
->level
;
1286 map
->num_members
= info
->raid_disks
;
1287 for (i
= 0; i
< map
->num_members
; i
++) {
1288 /* initialized in add_to_super */
1289 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1291 mpb
->num_raid_devs
++;
1292 super
->dev_tbl
[super
->current_vol
] = dev
;
1297 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1298 unsigned long long size
, char *name
,
1299 char *homehost
, int *uuid
)
1301 /* This is primarily called by Create when creating a new array.
1302 * We will then get add_to_super called for each component, and then
1303 * write_init_super called to write it out to each device.
1304 * For IMSM, Create can create on fresh devices or on a pre-existing
1306 * To create on a pre-existing array a different method will be called.
1307 * This one is just for fresh drives.
1309 struct intel_super
*super
;
1310 struct imsm_super
*mpb
;
1318 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1321 super
= alloc_super(1);
1324 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1325 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1330 memset(mpb
, 0, mpb_size
);
1332 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1333 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1334 strlen(MPB_VERSION_RAID5
));
1335 mpb
->mpb_size
= mpb_size
;
1341 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1342 int fd
, char *devname
)
1344 struct intel_super
*super
= st
->sb
;
1346 struct imsm_dev
*dev
;
1347 struct imsm_map
*map
;
1348 struct imsm_disk
*disk
;
1351 dev
= get_imsm_dev(super
, super
->current_vol
);
1352 map
= &dev
->vol
.map
[0];
1354 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1355 if (dl
->major
== dk
->major
&&
1356 dl
->minor
== dk
->minor
)
1358 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1361 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1363 disk
= get_imsm_disk(super
, dl
->index
);
1364 status
= CONFIGURED_DISK
| USABLE_DISK
;
1365 disk
->status
= __cpu_to_le32(status
);
1368 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1369 int fd
, char *devname
)
1371 struct intel_super
*super
= st
->sb
;
1372 struct imsm_super
*mpb
= super
->anchor
;
1373 struct imsm_disk
*disk
;
1375 unsigned long long size
;
1380 if (super
->current_vol
>= 0) {
1381 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1386 dd
= malloc(sizeof(*dd
));
1387 disk
= malloc(sizeof(*disk
));
1390 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1397 memset(dd
, 0, sizeof(*dd
));
1398 memset(disk
, 0, sizeof(*disk
));
1399 dd
->major
= major(stb
.st_rdev
);
1400 dd
->minor
= minor(stb
.st_rdev
);
1401 dd
->index
= dk
->number
;
1402 dd
->devname
= devname
? strdup(devname
) : NULL
;
1403 dd
->next
= super
->disks
;
1405 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1408 Name
": failed to retrieve scsi serial, aborting\n");
1414 if (mpb
->num_disks
<= dk
->number
)
1415 mpb
->num_disks
= dk
->number
+ 1;
1417 get_dev_size(fd
, NULL
, &size
);
1419 status
= USABLE_DISK
| SPARE_DISK
;
1420 strcpy((char *) disk
->serial
, (char *) dd
->serial
);
1421 disk
->total_blocks
= __cpu_to_le32(size
);
1422 disk
->status
= __cpu_to_le32(status
);
1423 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1424 disk
->scsi_id
= __cpu_to_le32(id
);
1426 disk
->scsi_id
= __cpu_to_le32(0);
1427 super
->disk_tbl
[dd
->index
] = disk
;
1429 /* update the family number if we are creating a container */
1430 if (super
->creating_imsm
) {
1431 disk
= __get_imsm_disk(mpb
, dd
->index
);
1432 *disk
= *super
->disk_tbl
[dd
->index
]; /* copy in new disk */
1433 mpb
->family_num
= __cpu_to_le32(__gen_imsm_checksum(mpb
));
1439 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1441 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1443 struct imsm_super
*mpb
= super
->anchor
;
1449 /* 'generation' is incremented everytime the metadata is written */
1450 generation
= __le32_to_cpu(mpb
->generation_num
);
1452 mpb
->generation_num
= __cpu_to_le32(generation
);
1454 for (i
= 0; i
< mpb
->num_disks
; i
++)
1455 mpb
->disk
[i
] = *super
->disk_tbl
[i
];
1456 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1457 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1459 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1462 /* recalculate checksum */
1463 sum
= __gen_imsm_checksum(mpb
);
1464 mpb
->check_sum
= __cpu_to_le32(sum
);
1466 for (d
= super
->disks
; d
; d
= d
->next
) {
1467 if (store_imsm_mpb(d
->fd
, super
)) {
1468 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1469 __func__
, d
->major
, d
->minor
, strerror(errno
));
1481 static int write_init_super_imsm(struct supertype
*st
)
1483 if (st
->update_tail
) {
1484 /* queue the recently created array as a metadata update */
1486 struct imsm_update_create_array
*u
;
1487 struct intel_super
*super
= st
->sb
;
1488 struct imsm_dev
*dev
;
1491 if (super
->current_vol
< 0 ||
1492 !(dev
= get_imsm_dev(super
, super
->current_vol
))) {
1493 fprintf(stderr
, "%s: could not determine sub-array\n",
1499 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
);
1502 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1507 u
->type
= update_create_array
;
1508 u
->dev_idx
= super
->current_vol
;
1509 imsm_copy_dev(&u
->dev
, dev
);
1510 append_metadata_update(st
, u
, len
);
1512 for (d
= super
->disks
; d
; d
= d
->next
) {
1519 return write_super_imsm(st
->sb
, 1);
1522 static int store_zero_imsm(struct supertype
*st
, int fd
)
1524 unsigned long long dsize
;
1527 get_dev_size(fd
, NULL
, &dsize
);
1529 /* first block is stored on second to last sector of the disk */
1530 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1533 if (posix_memalign(&buf
, 512, 512) != 0)
1536 memset(buf
, 0, 512);
1537 if (write(fd
, buf
, 512) != 512)
1542 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1543 int layout
, int raiddisks
, int chunk
,
1544 unsigned long long size
, char *dev
,
1545 unsigned long long *freesize
,
1549 unsigned long long ldsize
;
1551 if (level
!= LEVEL_CONTAINER
)
1556 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1559 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1560 dev
, strerror(errno
));
1563 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1569 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1574 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1575 * FIX ME add ahci details
1577 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1578 int layout
, int raiddisks
, int chunk
,
1579 unsigned long long size
, char *dev
,
1580 unsigned long long *freesize
,
1584 struct intel_super
*super
= st
->sb
;
1586 unsigned long long pos
= 0;
1587 unsigned long long maxsize
;
1591 if (level
== LEVEL_CONTAINER
)
1594 if (level
== 1 && raiddisks
> 2) {
1596 fprintf(stderr
, Name
": imsm does not support more "
1597 "than 2 in a raid1 configuration\n");
1601 /* We must have the container info already read in. */
1606 /* General test: make sure there is space for
1607 * 'raiddisks' device extents of size 'size' at a given
1610 unsigned long long minsize
= size
*2 /* convert to blocks */;
1611 unsigned long long start_offset
= ~0ULL;
1614 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1615 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1620 e
= get_extents(super
, dl
);
1623 unsigned long long esize
;
1624 esize
= e
[i
].start
- pos
;
1625 if (esize
>= minsize
)
1627 if (found
&& start_offset
== ~0ULL) {
1630 } else if (found
&& pos
!= start_offset
) {
1634 pos
= e
[i
].start
+ e
[i
].size
;
1636 } while (e
[i
-1].size
);
1641 if (dcnt
< raiddisks
) {
1643 fprintf(stderr
, Name
": imsm: Not enough "
1644 "devices with space for this array "
1651 /* This device must be a member of the set */
1652 if (stat(dev
, &stb
) < 0)
1654 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1656 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1657 if (dl
->major
== major(stb
.st_rdev
) &&
1658 dl
->minor
== minor(stb
.st_rdev
))
1663 fprintf(stderr
, Name
": %s is not in the "
1664 "same imsm set\n", dev
);
1667 e
= get_extents(super
, dl
);
1671 unsigned long long esize
;
1672 esize
= e
[i
].start
- pos
;
1673 if (esize
>= maxsize
)
1675 pos
= e
[i
].start
+ e
[i
].size
;
1677 } while (e
[i
-1].size
);
1678 *freesize
= maxsize
;
1683 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1684 int raiddisks
, int chunk
, unsigned long long size
,
1685 char *dev
, unsigned long long *freesize
,
1691 /* if given unused devices create a container
1692 * if given given devices in a container create a member volume
1694 if (level
== LEVEL_CONTAINER
) {
1695 /* Must be a fresh device to add to a container */
1696 return validate_geometry_imsm_container(st
, level
, layout
,
1697 raiddisks
, chunk
, size
,
1703 /* creating in a given container */
1704 return validate_geometry_imsm_volume(st
, level
, layout
,
1705 raiddisks
, chunk
, size
,
1706 dev
, freesize
, verbose
);
1709 /* limit creation to the following levels */
1721 /* This device needs to be a device in an 'imsm' container */
1722 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1726 Name
": Cannot create this array on device %s\n",
1731 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
1733 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1734 dev
, strerror(errno
));
1737 /* Well, it is in use by someone, maybe an 'imsm' container. */
1738 cfd
= open_container(fd
);
1742 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
1746 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
1748 if (sra
&& sra
->array
.major_version
== -1 &&
1749 strcmp(sra
->text_version
, "imsm") == 0) {
1750 /* This is a member of a imsm container. Load the container
1751 * and try to create a volume
1753 struct intel_super
*super
;
1755 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
1757 st
->container_dev
= fd2devnum(cfd
);
1759 return validate_geometry_imsm_volume(st
, level
, layout
,
1765 } else /* may belong to another container */
1771 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
1773 /* Given a container loaded by load_super_imsm_all,
1774 * extract information about all the arrays into
1777 * For each imsm_dev create an mdinfo, fill it in,
1778 * then look for matching devices in super->disks
1779 * and create appropriate device mdinfo.
1781 struct intel_super
*super
= st
->sb
;
1782 struct imsm_super
*mpb
= super
->anchor
;
1783 struct mdinfo
*rest
= NULL
;
1786 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1787 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
1788 struct imsm_vol
*vol
= &dev
->vol
;
1789 struct imsm_map
*map
= vol
->map
;
1790 struct mdinfo
*this;
1793 this = malloc(sizeof(*this));
1794 memset(this, 0, sizeof(*this));
1798 this->array
.level
= get_imsm_raid_level(map
);
1799 this->array
.raid_disks
= map
->num_members
;
1800 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
1801 this->array
.md_minor
= -1;
1802 this->array
.ctime
= 0;
1803 this->array
.utime
= 0;
1804 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1805 this->array
.state
= !vol
->dirty
;
1806 this->container_member
= i
;
1807 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1808 this->resync_start
= 0;
1810 this->resync_start
= ~0ULL;
1812 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1813 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
1815 sprintf(this->text_version
, "/%s/%d",
1816 devnum2devname(st
->container_dev
),
1817 this->container_member
);
1819 memset(this->uuid
, 0, sizeof(this->uuid
));
1821 this->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1823 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
1824 struct imsm_disk
*disk
;
1825 struct mdinfo
*info_d
;
1830 idx
= __le32_to_cpu(map
->disk_ord_tbl
[slot
] & ~(0xff << 24));
1831 for (d
= super
->disks
; d
; d
= d
->next
)
1832 if (d
->index
== idx
)
1836 break; /* shouldn't this be continue ?? */
1838 info_d
= malloc(sizeof(*info_d
));
1840 break; /* ditto ?? */
1841 memset(info_d
, 0, sizeof(*info_d
));
1842 info_d
->next
= this->devs
;
1843 this->devs
= info_d
;
1845 disk
= get_imsm_disk(super
, idx
);
1846 s
= __le32_to_cpu(disk
->status
);
1848 info_d
->disk
.number
= d
->index
;
1849 info_d
->disk
.major
= d
->major
;
1850 info_d
->disk
.minor
= d
->minor
;
1851 info_d
->disk
.raid_disk
= slot
;
1852 info_d
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
1853 info_d
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
1854 info_d
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
1856 this->array
.working_disks
++;
1858 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
1859 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1860 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1862 strcpy(info_d
->name
, d
->devname
);
1870 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
1873 struct intel_super
*super
= c
->sb
;
1874 struct imsm_super
*mpb
= super
->anchor
;
1876 if (atoi(inst
) >= mpb
->num_raid_devs
) {
1877 fprintf(stderr
, "%s: subarry index %d, out of range\n",
1878 __func__
, atoi(inst
));
1882 dprintf("imsm: open_new %s\n", inst
);
1883 a
->info
.container_member
= atoi(inst
);
1887 static __u8
imsm_check_degraded(struct intel_super
*super
, int n
, int failed
)
1889 struct imsm_dev
*dev
= get_imsm_dev(super
, n
);
1890 struct imsm_map
*map
= dev
->vol
.map
;
1893 return map
->map_state
;
1895 switch (get_imsm_raid_level(map
)) {
1897 return IMSM_T_STATE_FAILED
;
1900 if (failed
< map
->num_members
)
1901 return IMSM_T_STATE_DEGRADED
;
1903 return IMSM_T_STATE_FAILED
;
1908 * check to see if any mirrors have failed,
1909 * otherwise we are degraded
1911 int device_per_mirror
= 2; /* FIXME is this always the case?
1912 * and are they always adjacent?
1917 for (i
= 0; i
< map
->num_members
; i
++) {
1918 int idx
= get_imsm_disk_idx(map
, i
);
1919 struct imsm_disk
*disk
= get_imsm_disk(super
, idx
);
1921 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1924 if (failed
>= device_per_mirror
)
1925 return IMSM_T_STATE_FAILED
;
1927 /* reset 'failed' for next mirror set */
1928 if (!((i
+ 1) % device_per_mirror
))
1932 return IMSM_T_STATE_DEGRADED
;
1936 return IMSM_T_STATE_DEGRADED
;
1938 return IMSM_T_STATE_FAILED
;
1944 return map
->map_state
;
1947 static int imsm_count_failed(struct intel_super
*super
, struct imsm_map
*map
)
1951 struct imsm_disk
*disk
;
1953 for (i
= 0; i
< map
->num_members
; i
++) {
1954 int idx
= get_imsm_disk_idx(map
, i
);
1956 disk
= get_imsm_disk(super
, idx
);
1957 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1964 static void imsm_set_array_state(struct active_array
*a
, int consistent
)
1966 int inst
= a
->info
.container_member
;
1967 struct intel_super
*super
= a
->container
->sb
;
1968 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
1969 struct imsm_map
*map
= &dev
->vol
.map
[0];
1970 int dirty
= !consistent
;
1974 if (a
->resync_start
== ~0ULL) {
1975 failed
= imsm_count_failed(super
, map
);
1976 map_state
= imsm_check_degraded(super
, inst
, failed
);
1978 map_state
= IMSM_T_STATE_NORMAL
;
1979 if (map
->map_state
!= map_state
) {
1980 dprintf("imsm: map_state %d: %d\n",
1982 map
->map_state
= map_state
;
1983 super
->updates_pending
++;
1987 if (dev
->vol
.dirty
!= dirty
) {
1988 dprintf("imsm: mark '%s' (%llu)\n",
1989 dirty
?"dirty":"clean", a
->resync_start
);
1991 dev
->vol
.dirty
= dirty
;
1992 super
->updates_pending
++;
1996 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
1998 int inst
= a
->info
.container_member
;
1999 struct intel_super
*super
= a
->container
->sb
;
2000 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2001 struct imsm_map
*map
= dev
->vol
.map
;
2002 struct imsm_disk
*disk
;
2005 int new_failure
= 0;
2007 if (n
> map
->num_members
)
2008 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2009 n
, map
->num_members
- 1);
2014 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2016 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, n
));
2018 /* check for new failures */
2019 status
= __le32_to_cpu(disk
->status
);
2020 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2021 status
|= FAILED_DISK
;
2022 disk
->status
= __cpu_to_le32(status
);
2024 super
->updates_pending
++;
2027 /* the number of failures have changed, count up 'failed' to determine
2028 * degraded / failed status
2030 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
2031 failed
= imsm_count_failed(super
, map
);
2033 /* determine map_state based on failed or in_sync count */
2035 map
->map_state
= imsm_check_degraded(super
, inst
, failed
);
2036 else if (map
->map_state
== IMSM_T_STATE_DEGRADED
) {
2040 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2041 if (d
->curr_state
& DS_INSYNC
)
2044 if (working
== a
->info
.array
.raid_disks
) {
2045 map
->map_state
= IMSM_T_STATE_NORMAL
;
2046 super
->updates_pending
++;
2051 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2053 struct imsm_super
*mpb
= super
->anchor
;
2054 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2055 unsigned long long dsize
;
2056 unsigned long long sectors
;
2058 get_dev_size(fd
, NULL
, &dsize
);
2060 if (mpb_size
> 512) {
2061 /* -1 to account for anchor */
2062 sectors
= mpb_sectors(mpb
) - 1;
2064 /* write the extended mpb to the sectors preceeding the anchor */
2065 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2068 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2072 /* first block is stored on second to last sector of the disk */
2073 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2076 if (write(fd
, super
->buf
, 512) != 512)
2082 static void imsm_sync_metadata(struct supertype
*container
)
2084 struct intel_super
*super
= container
->sb
;
2086 if (!super
->updates_pending
)
2089 write_super_imsm(super
, 0);
2091 super
->updates_pending
= 0;
2094 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2095 struct metadata_update
**updates
)
2098 * Take a device that is marked spare in the metadata and use it to
2099 * replace a failed/vacant slot in an array. There may be a case where
2100 * a device is failed in one array but active in a second.
2101 * imsm_process_update catches this case and does not clear the SPARE_DISK
2102 * flag, allowing the second array to start using the device on failure.
2103 * SPARE_DISK is cleared when all arrays are using a device.
2105 * FIXME: is this a valid use of SPARE_DISK?
2108 struct intel_super
*super
= a
->container
->sb
;
2109 int inst
= a
->info
.container_member
;
2110 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2111 struct imsm_map
*map
= dev
->vol
.map
;
2112 int failed
= a
->info
.array
.raid_disks
;
2113 struct mdinfo
*rv
= NULL
;
2116 struct metadata_update
*mu
;
2118 struct imsm_update_activate_spare
*u
;
2122 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2123 if ((d
->curr_state
& DS_FAULTY
) &&
2125 /* wait for Removal to happen */
2127 if (d
->state_fd
>= 0)
2131 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2132 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2133 if (imsm_check_degraded(super
, inst
, failed
) != IMSM_T_STATE_DEGRADED
)
2136 /* For each slot, if it is not working, find a spare */
2138 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2139 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2140 if (d
->disk
.raid_disk
== i
)
2142 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2143 if (d
&& (d
->state_fd
>= 0))
2146 /* OK, this device needs recovery. Find a spare */
2147 for ( ; dl
; dl
= dl
->next
) {
2148 unsigned long long esize
;
2149 unsigned long long pos
;
2152 struct imsm_disk
*disk
;
2157 /* If in this array, skip */
2158 for (d2
= a
->info
.devs
; d2
; d2
= d2
->next
)
2159 if (d2
->disk
.major
== dl
->major
&&
2160 d2
->disk
.minor
== dl
->minor
) {
2161 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2167 /* is this unused device marked as a spare? */
2168 disk
= get_imsm_disk(super
, dl
->index
);
2169 if (!(__le32_to_cpu(disk
->status
) & SPARE_DISK
))
2172 /* We are allowed to use this device - is there space?
2173 * We need a->info.component_size sectors */
2174 ex
= get_extents(super
, dl
);
2176 dprintf("cannot get extents\n");
2182 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2185 /* check that we can start at pba_of_lba0 with
2186 * a->info.component_size of space
2188 esize
= ex
[j
].start
- pos
;
2189 if (array_start
>= pos
&&
2190 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2194 pos
= ex
[j
].start
+ ex
[j
].size
;
2197 } while (ex
[j
-1].size
);
2201 dprintf("%x:%x does not have %llu at %d\n",
2202 dl
->major
, dl
->minor
,
2203 a
->info
.component_size
,
2204 __le32_to_cpu(map
->pba_of_lba0
));
2209 /* found a usable disk with enough space */
2210 di
= malloc(sizeof(*di
));
2211 memset(di
, 0, sizeof(*di
));
2212 di
->disk
.number
= dl
->index
;
2213 di
->disk
.raid_disk
= i
;
2214 di
->disk
.major
= dl
->major
;
2215 di
->disk
.minor
= dl
->minor
;
2217 di
->data_offset
= array_start
;
2218 di
->component_size
= a
->info
.component_size
;
2219 di
->container_member
= inst
;
2223 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2231 /* No spares found */
2233 /* Now 'rv' has a list of devices to return.
2234 * Create a metadata_update record to update the
2235 * disk_ord_tbl for the array
2237 mu
= malloc(sizeof(*mu
));
2238 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2240 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2241 mu
->next
= *updates
;
2242 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2244 for (di
= rv
; di
; di
= di
->next
) {
2245 u
->type
= update_activate_spare
;
2246 u
->disk_idx
= di
->disk
.number
;
2247 u
->slot
= di
->disk
.raid_disk
;
2258 static int weight(unsigned int field
)
2262 for (weight
= 0; field
; weight
++)
2268 static int disks_overlap(struct imsm_map
*m1
, struct imsm_map
*m2
)
2274 for (i
= 0; i
< m1
->num_members
; i
++) {
2275 idx
= get_imsm_disk_idx(m1
, i
);
2276 for (j
= 0; j
< m2
->num_members
; j
++)
2277 if (idx
== get_imsm_disk_idx(m2
, j
))
2284 static void imsm_process_update(struct supertype
*st
,
2285 struct metadata_update
*update
)
2288 * crack open the metadata_update envelope to find the update record
2289 * update can be one of:
2290 * update_activate_spare - a spare device has replaced a failed
2291 * device in an array, update the disk_ord_tbl. If this disk is
2292 * present in all member arrays then also clear the SPARE_DISK
2295 struct intel_super
*super
= st
->sb
;
2296 struct imsm_super
*mpb
= super
->anchor
;
2297 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2300 case update_activate_spare
: {
2301 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
2302 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
2303 struct imsm_map
*map
= &dev
->vol
.map
[0];
2304 struct active_array
*a
;
2305 struct imsm_disk
*disk
;
2309 unsigned int members
;
2314 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2315 if (dl
->index
== u
->disk_idx
)
2319 fprintf(stderr
, "error: imsm_activate_spare passed "
2320 "an unknown disk_idx: %d\n", u
->disk_idx
);
2324 super
->updates_pending
++;
2326 victim
= get_imsm_disk_idx(map
, u
->slot
);
2327 map
->disk_ord_tbl
[u
->slot
] = __cpu_to_le32(u
->disk_idx
);
2328 disk
= get_imsm_disk(super
, u
->disk_idx
);
2329 status
= __le32_to_cpu(disk
->status
);
2330 status
|= CONFIGURED_DISK
;
2331 disk
->status
= __cpu_to_le32(status
);
2333 /* map unique/live arrays using the spare */
2336 for (a
= st
->arrays
; a
; a
= a
->next
) {
2337 int inst
= a
->info
.container_member
;
2339 dev
= get_imsm_dev(super
, inst
);
2340 map
= &dev
->vol
.map
[0];
2341 if (map
->raid_level
> 0)
2342 members
|= 1 << inst
;
2343 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2344 if (d
->disk
.major
== dl
->major
&&
2345 d
->disk
.minor
== dl
->minor
)
2349 /* until all arrays that can absorb this disk have absorbed
2350 * this disk it can still be considered a spare
2352 if (weight(found
) >= weight(members
)) {
2353 status
= __le32_to_cpu(disk
->status
);
2354 status
&= ~SPARE_DISK
;
2355 disk
->status
= __cpu_to_le32(status
);
2358 /* count arrays using the victim in the metadata */
2360 for (a
= st
->arrays
; a
; a
= a
->next
) {
2361 dev
= get_imsm_dev(super
, a
->info
.container_member
);
2362 map
= &dev
->vol
.map
[0];
2363 for (i
= 0; i
< map
->num_members
; i
++)
2364 if (victim
== get_imsm_disk_idx(map
, i
))
2368 /* clear some flags if the victim is no longer being
2371 disk
= get_imsm_disk(super
, victim
);
2373 status
= __le32_to_cpu(disk
->status
);
2374 status
&= ~(CONFIGURED_DISK
| USABLE_DISK
);
2375 disk
->status
= __cpu_to_le32(status
);
2379 case update_create_array
: {
2380 /* someone wants to create a new array, we need to be aware of
2381 * a few races/collisions:
2382 * 1/ 'Create' called by two separate instances of mdadm
2383 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
2384 * devices that have since been assimilated via
2386 * In the event this update can not be carried out mdadm will
2387 * (FIX ME) notice that its update did not take hold.
2389 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2390 struct imsm_dev
*dev
;
2391 struct imsm_map
*map
, *new_map
;
2392 unsigned long long start
, end
;
2393 unsigned long long new_start
, new_end
;
2397 /* handle racing creates: first come first serve */
2398 if (u
->dev_idx
< mpb
->num_raid_devs
) {
2399 dprintf("%s: subarray %d already defined\n",
2400 __func__
, u
->dev_idx
);
2404 /* check update is next in sequence */
2405 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
2406 dprintf("%s: can not create arrays out of sequence\n",
2411 new_map
= &u
->dev
.vol
.map
[0];
2412 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
2413 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
2415 /* handle activate_spare versus create race:
2416 * check to make sure that overlapping arrays do not include
2419 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2420 dev
= get_imsm_dev(super
, i
);
2421 map
= &dev
->vol
.map
[0];
2422 start
= __le32_to_cpu(map
->pba_of_lba0
);
2423 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
2424 if ((new_start
>= start
&& new_start
<= end
) ||
2425 (start
>= new_start
&& start
<= new_end
))
2427 if (overlap
&& disks_overlap(map
, new_map
)) {
2428 dprintf("%s: arrays overlap\n", __func__
);
2432 /* check num_members sanity */
2433 if (new_map
->num_members
> mpb
->num_disks
) {
2434 dprintf("%s: num_disks out of range\n", __func__
);
2438 /* check that prepare update was successful */
2439 if (!update
->space
) {
2440 dprintf("%s: prepare update failed\n", __func__
);
2444 super
->updates_pending
++;
2445 dev
= update
->space
;
2446 update
->space
= NULL
;
2447 imsm_copy_dev(dev
, &u
->dev
);
2448 super
->dev_tbl
[u
->dev_idx
] = dev
;
2449 mpb
->num_raid_devs
++;
2451 /* fix up flags, if arrays overlap then the drives can not be
2454 for (i
= 0; i
< map
->num_members
; i
++) {
2455 struct imsm_disk
*disk
;
2458 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, i
));
2459 status
= __le32_to_cpu(disk
->status
);
2460 status
|= CONFIGURED_DISK
;
2462 status
&= ~SPARE_DISK
;
2463 disk
->status
= __cpu_to_le32(status
);
2470 static void imsm_prepare_update(struct supertype
*st
,
2471 struct metadata_update
*update
)
2474 * Allocate space to hold new disk entries, raid-device entries or a
2475 * new mpb if necessary. We currently maintain an mpb large enough to
2476 * hold 2 subarrays for the given number of disks. This may not be
2477 * sufficient when reshaping.
2479 * FIX ME handle the reshape case.
2481 * The monitor will be able to safely change super->mpb by arranging
2482 * for it to be freed in check_update_queue(). I.e. the monitor thread
2483 * will start using the new pointer and the manager can continue to use
2484 * the old value until check_update_queue() runs.
2486 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2489 case update_create_array
: {
2490 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2491 size_t len
= sizeof_imsm_dev(&u
->dev
);
2493 update
->space
= malloc(len
);
2503 struct superswitch super_imsm
= {
2505 .examine_super
= examine_super_imsm
,
2506 .brief_examine_super
= brief_examine_super_imsm
,
2507 .detail_super
= detail_super_imsm
,
2508 .brief_detail_super
= brief_detail_super_imsm
,
2509 .write_init_super
= write_init_super_imsm
,
2511 .match_home
= match_home_imsm
,
2512 .uuid_from_super
= uuid_from_super_imsm
,
2513 .getinfo_super
= getinfo_super_imsm
,
2514 .update_super
= update_super_imsm
,
2516 .avail_size
= avail_size_imsm
,
2518 .compare_super
= compare_super_imsm
,
2520 .load_super
= load_super_imsm
,
2521 .init_super
= init_super_imsm
,
2522 .add_to_super
= add_to_super_imsm
,
2523 .store_super
= store_zero_imsm
,
2524 .free_super
= free_super_imsm
,
2525 .match_metadata_desc
= match_metadata_desc_imsm
,
2526 .container_content
= container_content_imsm
,
2528 .validate_geometry
= validate_geometry_imsm
,
2532 .open_new
= imsm_open_new
,
2533 .load_super
= load_super_imsm
,
2534 .set_array_state
= imsm_set_array_state
,
2535 .set_disk
= imsm_set_disk
,
2536 .sync_metadata
= imsm_sync_metadata
,
2537 .activate_spare
= imsm_activate_spare
,
2538 .process_update
= imsm_process_update
,
2539 .prepare_update
= imsm_prepare_update
,