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 error_log_size
; /* 0x30 - 0x33 in bytes */
104 __u32 attributes
; /* 0x34 - 0x37 */
105 __u8 num_disks
; /* 0x38 Number of configured disks */
106 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
107 __u8 error_log_pos
; /* 0x3A */
108 __u8 fill
[1]; /* 0x3B */
109 __u32 cache_size
; /* 0x3c - 0x40 in mb */
110 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
111 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
112 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
113 #define IMSM_FILLERS 35
114 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
115 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
116 /* here comes imsm_dev[num_raid_devs] */
117 /* here comes BBM logs */
118 } __attribute__ ((packed
));
120 #define BBM_LOG_MAX_ENTRIES 254
122 struct bbm_log_entry
{
123 __u64 defective_block_start
;
124 #define UNREADABLE 0xFFFFFFFF
125 __u32 spare_block_offset
;
126 __u16 remapped_marked_count
;
128 } __attribute__ ((__packed__
));
131 __u32 signature
; /* 0xABADB10C */
133 __u32 reserved_spare_block_count
; /* 0 */
134 __u32 reserved
; /* 0xFFFF */
135 __u64 first_spare_lba
;
136 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
137 } __attribute__ ((__packed__
));
141 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
144 static unsigned int sector_count(__u32 bytes
)
146 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
149 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
151 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
154 /* internal representation of IMSM metadata */
157 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
158 struct imsm_super
*anchor
; /* immovable parameters */
160 size_t len
; /* size of the 'buf' allocation */
161 int updates_pending
; /* count of pending updates for mdmon */
162 int creating_imsm
; /* flag to indicate container creation */
163 int current_vol
; /* index of raid device undergoing creation */
164 #define IMSM_MAX_RAID_DEVS 2
165 struct imsm_dev
*dev_tbl
[IMSM_MAX_RAID_DEVS
];
169 __u8 serial
[MAX_RAID_SERIAL_LEN
];
172 struct imsm_disk disk
;
175 struct bbm_log
*bbm_log
;
179 unsigned long long start
, size
;
182 /* definition of messages passed to imsm_process_update */
183 enum imsm_update_type
{
184 update_activate_spare
,
188 struct imsm_update_activate_spare
{
189 enum imsm_update_type type
;
193 struct imsm_update_activate_spare
*next
;
196 struct imsm_update_create_array
{
197 enum imsm_update_type type
;
202 static int imsm_env_devname_as_serial(void)
204 char *val
= getenv("IMSM_DEVNAME_AS_SERIAL");
206 if (val
&& atoi(val
) == 1)
213 static struct supertype
*match_metadata_desc_imsm(char *arg
)
215 struct supertype
*st
;
217 if (strcmp(arg
, "imsm") != 0 &&
218 strcmp(arg
, "default") != 0
222 st
= malloc(sizeof(*st
));
223 memset(st
, 0, sizeof(*st
));
224 st
->ss
= &super_imsm
;
225 st
->max_devs
= IMSM_MAX_DEVICES
;
226 st
->minor_version
= 0;
231 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
233 return &mpb
->sig
[MPB_SIG_LEN
];
236 /* retrieve a disk directly from the anchor when the anchor is known to be
237 * up-to-date, currently only at load time
239 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
241 if (index
>= mpb
->num_disks
)
243 return &mpb
->disk
[index
];
246 /* retrieve a disk from the parsed metadata */
247 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
251 for (d
= super
->disks
; d
; d
= d
->next
)
252 if (d
->index
== index
)
258 /* generate a checksum directly from the anchor when the anchor is known to be
259 * up-to-date, currently only at load or write_super after coalescing
261 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
263 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
264 __u32
*p
= (__u32
*) mpb
;
268 sum
+= __le32_to_cpu(*p
++);
270 return sum
- __le32_to_cpu(mpb
->check_sum
);
273 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
)
275 size_t size
= sizeof(*dev
);
277 /* each map has disk_ord_tbl[num_members - 1] additional space */
278 size
+= sizeof(__u32
) * (dev
->vol
.map
[0].num_members
- 1);
280 /* migrating means an additional map */
281 if (dev
->vol
.migr_state
) {
282 size
+= sizeof(struct imsm_map
);
283 size
+= sizeof(__u32
) * (dev
->vol
.map
[1].num_members
- 1);
289 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
295 if (index
>= mpb
->num_raid_devs
)
298 /* devices start after all disks */
299 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
301 for (i
= 0; i
<= index
; i
++)
303 return _mpb
+ offset
;
305 offset
+= sizeof_imsm_dev(_mpb
+ offset
);
310 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
312 if (index
>= super
->anchor
->num_raid_devs
)
314 return super
->dev_tbl
[index
];
317 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
319 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
321 /* top byte is 'special' */
322 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
325 static int get_imsm_raid_level(struct imsm_map
*map
)
327 if (map
->raid_level
== 1) {
328 if (map
->num_members
== 2)
334 return map
->raid_level
;
337 static int cmp_extent(const void *av
, const void *bv
)
339 const struct extent
*a
= av
;
340 const struct extent
*b
= bv
;
341 if (a
->start
< b
->start
)
343 if (a
->start
> b
->start
)
348 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
350 /* find a list of used extents on the given physical device */
351 struct extent
*rv
, *e
;
355 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
356 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
357 struct imsm_map
*map
= dev
->vol
.map
;
359 for (j
= 0; j
< map
->num_members
; j
++) {
360 __u32 index
= get_imsm_disk_idx(map
, j
);
362 if (index
== dl
->index
)
366 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
371 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
372 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
373 struct imsm_map
*map
= dev
->vol
.map
;
375 for (j
= 0; j
< map
->num_members
; j
++) {
376 __u32 index
= get_imsm_disk_idx(map
, j
);
378 if (index
== dl
->index
) {
379 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
380 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
385 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
387 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) -
388 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
394 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
398 struct imsm_map
*map
= dev
->vol
.map
;
401 printf("[%s]:\n", dev
->volume
);
402 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
403 printf(" Members : %d\n", map
->num_members
);
404 for (slot
= 0; slot
< map
->num_members
; slot
++)
405 if (index
== get_imsm_disk_idx(map
, slot
))
407 if (slot
< map
->num_members
)
408 printf(" This Slot : %d\n", slot
);
410 printf(" This Slot : ?\n");
411 sz
= __le32_to_cpu(dev
->size_high
);
413 sz
+= __le32_to_cpu(dev
->size_low
);
414 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
415 human_size(sz
* 512));
416 sz
= __le32_to_cpu(map
->blocks_per_member
);
417 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
418 human_size(sz
* 512));
419 printf(" Sector Offset : %u\n",
420 __le32_to_cpu(map
->pba_of_lba0
));
421 printf(" Num Stripes : %u\n",
422 __le32_to_cpu(map
->num_data_stripes
));
423 printf(" Chunk Size : %u KiB\n",
424 __le16_to_cpu(map
->blocks_per_strip
) / 2);
425 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
426 printf(" Migrate State : %s\n", dev
->vol
.migr_state
? "migrating" : "idle");
427 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
428 printf(" Map State : %s\n", map_state_str
[map
->map_state
]);
431 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
433 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
434 char str
[MAX_RAID_SERIAL_LEN
];
442 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
443 printf(" Disk%02d Serial : %s\n", index
, str
);
444 s
= __le32_to_cpu(disk
->status
);
445 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
446 s
&CONFIGURED_DISK
? " active" : "",
447 s
&FAILED_DISK
? " failed" : "",
448 s
&USABLE_DISK
? " usable" : "");
449 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
450 sz
= __le32_to_cpu(disk
->total_blocks
) -
451 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
452 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
453 human_size(sz
* 512));
456 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
458 struct intel_super
*super
= st
->sb
;
459 struct imsm_super
*mpb
= super
->anchor
;
460 char str
[MAX_SIGNATURE_LENGTH
];
464 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
465 printf(" Magic : %s\n", str
);
466 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
467 printf(" Version : %s\n", get_imsm_version(mpb
));
468 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
469 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
470 sum
= __le32_to_cpu(mpb
->check_sum
);
471 printf(" Checksum : %08x %s\n", sum
,
472 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
473 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
474 printf(" Disks : %d\n", mpb
->num_disks
);
475 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
476 print_imsm_disk(mpb
, super
->disks
->index
);
477 if (super
->bbm_log
) {
478 struct bbm_log
*log
= super
->bbm_log
;
481 printf("Bad Block Management Log:\n");
482 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
483 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
484 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
485 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
486 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
488 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
489 print_imsm_dev(__get_imsm_dev(mpb
, i
), super
->disks
->index
);
490 for (i
= 0; i
< mpb
->num_disks
; i
++) {
491 if (i
== super
->disks
->index
)
493 print_imsm_disk(mpb
, i
);
497 static void brief_examine_super_imsm(struct supertype
*st
)
499 struct intel_super
*super
= st
->sb
;
501 printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
502 __le32_to_cpu(super
->anchor
->family_num
));
505 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
507 printf("%s\n", __FUNCTION__
);
510 static void brief_detail_super_imsm(struct supertype
*st
)
512 printf("%s\n", __FUNCTION__
);
516 static int match_home_imsm(struct supertype
*st
, char *homehost
)
518 printf("%s\n", __FUNCTION__
);
523 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
525 printf("%s\n", __FUNCTION__
);
530 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
532 __u8
*v
= get_imsm_version(mpb
);
533 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
534 char major
[] = { 0, 0, 0 };
535 char minor
[] = { 0 ,0, 0 };
536 char patch
[] = { 0, 0, 0 };
537 char *ver_parse
[] = { major
, minor
, patch
};
541 while (*v
!= '\0' && v
< end
) {
542 if (*v
!= '.' && j
< 2)
543 ver_parse
[i
][j
++] = *v
;
551 *m
= strtol(minor
, NULL
, 0);
552 *p
= strtol(patch
, NULL
, 0);
556 static int imsm_level_to_layout(int level
)
564 return ALGORITHM_LEFT_ASYMMETRIC
;
566 return 0x102; //FIXME is this correct?
571 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
573 struct intel_super
*super
= st
->sb
;
574 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
575 struct imsm_map
*map
= &dev
->vol
.map
[0];
577 info
->container_member
= super
->current_vol
;
578 info
->array
.raid_disks
= map
->num_members
;
579 info
->array
.level
= get_imsm_raid_level(map
);
580 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
581 info
->array
.md_minor
= -1;
582 info
->array
.ctime
= 0;
583 info
->array
.utime
= 0;
584 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
586 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
587 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
589 info
->disk
.major
= 0;
590 info
->disk
.minor
= 0;
592 sprintf(info
->text_version
, "/%s/%d",
593 devnum2devname(st
->container_dev
),
594 info
->container_member
);
598 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
600 struct intel_super
*super
= st
->sb
;
601 struct imsm_disk
*disk
;
604 if (super
->current_vol
>= 0) {
605 getinfo_super_imsm_volume(st
, info
);
608 info
->array
.raid_disks
= super
->anchor
->num_disks
;
609 info
->array
.level
= LEVEL_CONTAINER
;
610 info
->array
.layout
= 0;
611 info
->array
.md_minor
= -1;
612 info
->array
.ctime
= 0; /* N/A for imsm */
613 info
->array
.utime
= 0;
614 info
->array
.chunk_size
= 0;
616 info
->disk
.major
= 0;
617 info
->disk
.minor
= 0;
618 info
->disk
.raid_disk
= -1;
619 info
->reshape_active
= 0;
620 strcpy(info
->text_version
, "imsm");
621 info
->disk
.number
= -1;
622 info
->disk
.state
= 0;
625 disk
= &super
->disks
->disk
;
626 info
->disk
.number
= super
->disks
->index
;
627 info
->disk
.raid_disk
= super
->disks
->index
;
628 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
629 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
630 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
631 s
= __le32_to_cpu(disk
->status
);
632 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
633 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
634 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
638 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
639 char *update
, char *devname
, int verbose
,
640 int uuid_set
, char *homehost
)
644 /* For 'assemble' and 'force' we need to return non-zero if any
645 * change was made. For others, the return value is ignored.
646 * Update options are:
647 * force-one : This device looks a bit old but needs to be included,
648 * update age info appropriately.
649 * assemble: clear any 'faulty' flag to allow this device to
651 * force-array: Array is degraded but being forced, mark it clean
652 * if that will be needed to assemble it.
654 * newdev: not used ????
655 * grow: Array has gained a new device - this is currently for
657 * resync: mark as dirty so a resync will happen.
658 * name: update the name - preserving the homehost
660 * Following are not relevant for this imsm:
661 * sparc2.2 : update from old dodgey metadata
662 * super-minor: change the preferred_minor number
663 * summaries: update redundant counters.
664 * uuid: Change the uuid of the array to match watch is given
665 * homehost: update the recorded homehost
666 * _reshape_progress: record new reshape_progress position.
669 //struct intel_super *super = st->sb;
670 //struct imsm_super *mpb = super->mpb;
672 if (strcmp(update
, "grow") == 0) {
674 if (strcmp(update
, "resync") == 0) {
675 /* dev->vol.dirty = 1; */
678 /* IMSM has no concept of UUID or homehost */
683 static size_t disks_to_mpb_size(int disks
)
687 size
= sizeof(struct imsm_super
);
688 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
689 size
+= 2 * sizeof(struct imsm_dev
);
690 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
691 size
+= (4 - 2) * sizeof(struct imsm_map
);
692 /* 4 possible disk_ord_tbl's */
693 size
+= 4 * (disks
- 1) * sizeof(__u32
);
698 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
700 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
703 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
706 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
710 * 0 same, or first was empty, and second was copied
711 * 1 second had wrong number
715 struct intel_super
*first
= st
->sb
;
716 struct intel_super
*sec
= tst
->sb
;
724 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
726 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
728 if (first
->anchor
->mpb_size
!= sec
->anchor
->mpb_size
)
730 if (first
->anchor
->check_sum
!= sec
->anchor
->check_sum
)
736 static void fd2devname(int fd
, char *name
)
745 if (fstat(fd
, &st
) != 0)
747 sprintf(path
, "/sys/dev/block/%d:%d",
748 major(st
.st_rdev
), minor(st
.st_rdev
));
750 rv
= readlink(path
, dname
, sizeof(dname
));
755 nm
= strrchr(dname
, '/');
757 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
761 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
763 static int imsm_read_serial(int fd
, char *devname
,
764 __u8 serial
[MAX_RAID_SERIAL_LEN
])
766 unsigned char scsi_serial
[255];
771 memset(scsi_serial
, 0, sizeof(scsi_serial
));
773 if (imsm_env_devname_as_serial()) {
774 char name
[MAX_RAID_SERIAL_LEN
];
776 fd2devname(fd
, name
);
777 strcpy((char *) serial
, name
);
781 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
786 Name
": Failed to retrieve serial for %s\n",
791 rsp_len
= scsi_serial
[3];
792 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
793 if (!isspace(scsi_serial
[4 + i
]))
794 serial
[cnt
++] = scsi_serial
[4 + i
];
795 if (cnt
== MAX_RAID_SERIAL_LEN
)
799 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
805 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
812 dl
= malloc(sizeof(*dl
));
816 Name
": failed to allocate disk buffer for %s\n",
820 memset(dl
, 0, sizeof(*dl
));
823 dl
->major
= major(stb
.st_rdev
);
824 dl
->minor
= minor(stb
.st_rdev
);
825 dl
->next
= super
->disks
;
826 dl
->fd
= keep_fd
? fd
: -1;
827 dl
->devname
= devname
? strdup(devname
) : NULL
;
830 rv
= imsm_read_serial(fd
, devname
, dl
->serial
);
835 /* look up this disk's index */
836 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
837 struct imsm_disk
*disk_iter
;
839 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
841 if (memcmp(disk_iter
->serial
, dl
->serial
,
842 MAX_RAID_SERIAL_LEN
) == 0) {
843 dl
->disk
= *disk_iter
;
849 if (i
== super
->anchor
->num_disks
) {
852 Name
": failed to match serial \'%s\' for %s\n",
853 dl
->serial
, devname
);
860 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
866 for (i
= 0; i
< src
->vol
.map
[0].num_members
; i
++)
867 dest
->vol
.map
[0].disk_ord_tbl
[i
] = src
->vol
.map
[0].disk_ord_tbl
[i
];
869 if (!src
->vol
.migr_state
)
872 dest
->vol
.map
[1] = src
->vol
.map
[1];
873 for (i
= 0; i
< src
->vol
.map
[1].num_members
; i
++)
874 dest
->vol
.map
[1].disk_ord_tbl
[i
] = src
->vol
.map
[1].disk_ord_tbl
[i
];
877 static int parse_raid_devices(struct intel_super
*super
)
880 struct imsm_dev
*dev_new
;
883 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
884 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
886 len
= sizeof_imsm_dev(dev_iter
);
887 dev_new
= malloc(len
);
890 imsm_copy_dev(dev_new
, dev_iter
);
891 super
->dev_tbl
[i
] = dev_new
;
897 /* retrieve a pointer to the bbm log which starts after all raid devices */
898 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
902 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
904 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
910 static void __free_imsm(struct intel_super
*super
);
912 /* load_imsm_mpb - read matrix metadata
913 * allocates super->mpb to be freed by free_super
915 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
917 unsigned long long dsize
;
918 unsigned long long sectors
;
920 struct imsm_super
*anchor
;
924 get_dev_size(fd
, NULL
, &dsize
);
926 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
929 Name
": Cannot seek to anchor block on %s: %s\n",
930 devname
, strerror(errno
));
934 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
937 Name
": Failed to allocate imsm anchor buffer"
938 " on %s\n", devname
);
941 if (read(fd
, anchor
, 512) != 512) {
944 Name
": Cannot read anchor block on %s: %s\n",
945 devname
, strerror(errno
));
950 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
953 Name
": no IMSM anchor on %s\n", devname
);
959 super
->len
= __le32_to_cpu(anchor
->mpb_size
);
960 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
961 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
964 Name
": unable to allocate %zu byte mpb buffer\n",
969 memcpy(super
->buf
, anchor
, 512);
971 sectors
= mpb_sectors(anchor
) - 1;
974 rc
= load_imsm_disk(fd
, super
, devname
, 0);
976 rc
= parse_raid_devices(super
);
980 /* read the extended mpb */
981 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
984 Name
": Cannot seek to extended mpb on %s: %s\n",
985 devname
, strerror(errno
));
989 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
992 Name
": Cannot read extended mpb on %s: %s\n",
993 devname
, strerror(errno
));
997 check_sum
= __gen_imsm_checksum(super
->anchor
);
998 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1001 Name
": IMSM checksum %x != %x on %s\n",
1002 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1007 /* FIXME the BBM log is disk specific so we cannot use this global
1008 * buffer for all disks. Ok for now since we only look at the global
1009 * bbm_log_size parameter to gate assembly
1011 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1013 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1015 rc
= parse_raid_devices(super
);
1019 static void free_imsm_disks(struct intel_super
*super
)
1021 while (super
->disks
) {
1022 struct dl
*d
= super
->disks
;
1024 super
->disks
= d
->next
;
1033 /* free all the pieces hanging off of a super pointer */
1034 static void __free_imsm(struct intel_super
*super
)
1042 free_imsm_disks(super
);
1043 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1044 if (super
->dev_tbl
[i
]) {
1045 free(super
->dev_tbl
[i
]);
1046 super
->dev_tbl
[i
] = NULL
;
1050 static void free_imsm(struct intel_super
*super
)
1056 static void free_super_imsm(struct supertype
*st
)
1058 struct intel_super
*super
= st
->sb
;
1067 static struct intel_super
*alloc_super(int creating_imsm
)
1069 struct intel_super
*super
= malloc(sizeof(*super
));
1072 memset(super
, 0, sizeof(*super
));
1073 super
->creating_imsm
= creating_imsm
;
1074 super
->current_vol
= -1;
1081 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1082 char *devname
, int keep_fd
)
1085 struct intel_super
*super
;
1086 struct mdinfo
*sd
, *best
= NULL
;
1093 /* check if this disk is a member of an active array */
1094 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1098 if (sra
->array
.major_version
!= -1 ||
1099 sra
->array
.minor_version
!= -2 ||
1100 strcmp(sra
->text_version
, "imsm") != 0)
1103 super
= alloc_super(0);
1107 /* find the most up to date disk in this array */
1108 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1109 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1110 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1115 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1119 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1120 if (!best
|| gen
> bestgen
) {
1135 /* load the most up to date anchor */
1136 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1137 dfd
= dev_open(nm
, O_RDONLY
);
1142 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1149 /* reset the disk list */
1150 free_imsm_disks(super
);
1152 /* populate disk list */
1153 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1154 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1155 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1160 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1165 if (st
->subarray
[0]) {
1166 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1167 super
->current_vol
= atoi(st
->subarray
);
1173 if (st
->ss
== NULL
) {
1174 st
->ss
= &super_imsm
;
1175 st
->minor_version
= 0;
1176 st
->max_devs
= IMSM_MAX_DEVICES
;
1177 st
->container_dev
= fd2devnum(fd
);
1184 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1186 struct intel_super
*super
;
1190 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1193 if (st
->subarray
[0])
1194 return 1; /* FIXME */
1196 super
= alloc_super(0);
1199 Name
": malloc of %zu failed.\n",
1204 rv
= load_imsm_mpb(fd
, super
, devname
);
1209 Name
": Failed to load all information "
1210 "sections on %s\n", devname
);
1216 if (st
->ss
== NULL
) {
1217 st
->ss
= &super_imsm
;
1218 st
->minor_version
= 0;
1219 st
->max_devs
= IMSM_MAX_DEVICES
;
1225 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1227 if (info
->level
== 1)
1229 return info
->chunk_size
>> 9;
1232 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1236 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1237 if (info
->level
== 1)
1243 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1245 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1248 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1249 unsigned long long size
, char *name
,
1250 char *homehost
, int *uuid
)
1252 /* We are creating a volume inside a pre-existing container.
1253 * so st->sb is already set.
1255 struct intel_super
*super
= st
->sb
;
1256 struct imsm_super
*mpb
= super
->anchor
;
1257 struct imsm_dev
*dev
;
1258 struct imsm_vol
*vol
;
1259 struct imsm_map
*map
;
1260 int idx
= mpb
->num_raid_devs
;
1262 unsigned long long array_blocks
;
1264 size_t size_old
, size_new
;
1266 if (mpb
->num_raid_devs
>= 2) {
1267 fprintf(stderr
, Name
": This imsm-container already has the "
1268 "maximum of 2 volumes\n");
1272 /* ensure the mpb is large enough for the new data */
1273 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1274 size_new
= disks_to_mpb_size(info
->nr_disks
);
1275 if (size_new
> size_old
) {
1277 size_t size_round
= ROUND_UP(size_new
, 512);
1279 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1280 fprintf(stderr
, Name
": could not allocate new mpb\n");
1283 memcpy(mpb_new
, mpb
, size_old
);
1286 super
->anchor
= mpb_new
;
1287 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1288 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1290 super
->current_vol
= idx
;
1291 sprintf(st
->subarray
, "%d", idx
);
1292 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1294 fprintf(stderr
, Name
": could not allocate raid device\n");
1297 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1298 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1299 info
->layout
, info
->chunk_size
,
1301 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1302 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1303 dev
->status
= __cpu_to_le32(0);
1304 dev
->reserved_blocks
= __cpu_to_le32(0);
1306 vol
->migr_state
= 0;
1309 for (i
= 0; i
< idx
; i
++) {
1310 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1311 struct imsm_map
*pmap
= &prev
->vol
.map
[0];
1313 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1314 offset
+= IMSM_RESERVED_SECTORS
;
1317 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1318 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1319 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1320 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1321 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1322 IMSM_T_STATE_NORMAL
;
1324 if (info
->level
== 1 && info
->raid_disks
> 2) {
1325 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1326 "in a raid1 volume\n");
1329 if (info
->level
== 10)
1330 map
->raid_level
= 1;
1332 map
->raid_level
= info
->level
;
1334 map
->num_members
= info
->raid_disks
;
1335 for (i
= 0; i
< map
->num_members
; i
++) {
1336 /* initialized in add_to_super */
1337 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1339 mpb
->num_raid_devs
++;
1340 super
->dev_tbl
[super
->current_vol
] = dev
;
1345 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1346 unsigned long long size
, char *name
,
1347 char *homehost
, int *uuid
)
1349 /* This is primarily called by Create when creating a new array.
1350 * We will then get add_to_super called for each component, and then
1351 * write_init_super called to write it out to each device.
1352 * For IMSM, Create can create on fresh devices or on a pre-existing
1354 * To create on a pre-existing array a different method will be called.
1355 * This one is just for fresh drives.
1357 struct intel_super
*super
;
1358 struct imsm_super
*mpb
;
1366 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1369 super
= alloc_super(1);
1372 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1373 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1378 memset(mpb
, 0, mpb_size
);
1380 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1381 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1382 strlen(MPB_VERSION_RAID5
));
1383 mpb
->mpb_size
= mpb_size
;
1389 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1390 int fd
, char *devname
)
1392 struct intel_super
*super
= st
->sb
;
1394 struct imsm_dev
*dev
;
1395 struct imsm_map
*map
;
1396 struct imsm_disk
*disk
;
1399 dev
= get_imsm_dev(super
, super
->current_vol
);
1400 map
= &dev
->vol
.map
[0];
1402 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1403 if (dl
->major
== dk
->major
&&
1404 dl
->minor
== dk
->minor
)
1406 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1409 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1411 disk
= get_imsm_disk(super
, dl
->index
);
1412 status
= CONFIGURED_DISK
| USABLE_DISK
;
1413 disk
->status
= __cpu_to_le32(status
);
1416 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1417 int fd
, char *devname
)
1419 struct intel_super
*super
= st
->sb
;
1420 struct imsm_super
*mpb
= super
->anchor
;
1421 struct imsm_disk
*disk
;
1423 unsigned long long size
;
1428 if (super
->current_vol
>= 0) {
1429 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1434 dd
= malloc(sizeof(*dd
));
1437 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1440 memset(dd
, 0, sizeof(*dd
));
1441 dd
->major
= major(stb
.st_rdev
);
1442 dd
->minor
= minor(stb
.st_rdev
);
1444 dd
->devname
= devname
? strdup(devname
) : NULL
;
1445 dd
->next
= super
->disks
;
1447 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1450 Name
": failed to retrieve scsi serial, aborting\n");
1455 if (mpb
->num_disks
<= dk
->number
)
1456 mpb
->num_disks
= dk
->number
+ 1;
1458 get_dev_size(fd
, NULL
, &size
);
1460 status
= USABLE_DISK
| SPARE_DISK
;
1461 strcpy((char *) dd
->disk
.serial
, (char *) dd
->serial
);
1462 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
1463 dd
->disk
.status
= __cpu_to_le32(status
);
1464 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1465 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
1467 dd
->disk
.scsi_id
= __cpu_to_le32(0);
1469 /* update the family number if we are creating a container */
1470 if (super
->creating_imsm
) {
1471 disk
= __get_imsm_disk(mpb
, dd
->index
);
1473 mpb
->family_num
= __cpu_to_le32(__gen_imsm_checksum(mpb
));
1479 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1481 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1483 struct imsm_super
*mpb
= super
->anchor
;
1489 /* 'generation' is incremented everytime the metadata is written */
1490 generation
= __le32_to_cpu(mpb
->generation_num
);
1492 mpb
->generation_num
= __cpu_to_le32(generation
);
1494 for (d
= super
->disks
; d
; d
= d
->next
)
1495 mpb
->disk
[d
->index
] = d
->disk
;
1497 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1498 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1500 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1503 /* recalculate checksum */
1504 sum
= __gen_imsm_checksum(mpb
);
1505 mpb
->check_sum
= __cpu_to_le32(sum
);
1507 for (d
= super
->disks
; d
; d
= d
->next
) {
1508 if (store_imsm_mpb(d
->fd
, super
)) {
1509 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1510 __func__
, d
->major
, d
->minor
, strerror(errno
));
1522 static int write_init_super_imsm(struct supertype
*st
)
1524 if (st
->update_tail
) {
1525 /* queue the recently created array as a metadata update */
1527 struct imsm_update_create_array
*u
;
1528 struct intel_super
*super
= st
->sb
;
1529 struct imsm_dev
*dev
;
1532 if (super
->current_vol
< 0 ||
1533 !(dev
= get_imsm_dev(super
, super
->current_vol
))) {
1534 fprintf(stderr
, "%s: could not determine sub-array\n",
1540 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
);
1543 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1548 u
->type
= update_create_array
;
1549 u
->dev_idx
= super
->current_vol
;
1550 imsm_copy_dev(&u
->dev
, dev
);
1551 append_metadata_update(st
, u
, len
);
1553 for (d
= super
->disks
; d
; d
= d
->next
) {
1560 return write_super_imsm(st
->sb
, 1);
1563 static int store_zero_imsm(struct supertype
*st
, int fd
)
1565 unsigned long long dsize
;
1568 get_dev_size(fd
, NULL
, &dsize
);
1570 /* first block is stored on second to last sector of the disk */
1571 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1574 if (posix_memalign(&buf
, 512, 512) != 0)
1577 memset(buf
, 0, 512);
1578 if (write(fd
, buf
, 512) != 512)
1583 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1584 int layout
, int raiddisks
, int chunk
,
1585 unsigned long long size
, char *dev
,
1586 unsigned long long *freesize
,
1590 unsigned long long ldsize
;
1592 if (level
!= LEVEL_CONTAINER
)
1597 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1600 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1601 dev
, strerror(errno
));
1604 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1610 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1615 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1616 * FIX ME add ahci details
1618 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1619 int layout
, int raiddisks
, int chunk
,
1620 unsigned long long size
, char *dev
,
1621 unsigned long long *freesize
,
1625 struct intel_super
*super
= st
->sb
;
1627 unsigned long long pos
= 0;
1628 unsigned long long maxsize
;
1632 if (level
== LEVEL_CONTAINER
)
1635 if (level
== 1 && raiddisks
> 2) {
1637 fprintf(stderr
, Name
": imsm does not support more "
1638 "than 2 in a raid1 configuration\n");
1642 /* We must have the container info already read in. */
1647 /* General test: make sure there is space for
1648 * 'raiddisks' device extents of size 'size' at a given
1651 unsigned long long minsize
= size
*2 /* convert to blocks */;
1652 unsigned long long start_offset
= ~0ULL;
1655 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1656 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1661 e
= get_extents(super
, dl
);
1664 unsigned long long esize
;
1665 esize
= e
[i
].start
- pos
;
1666 if (esize
>= minsize
)
1668 if (found
&& start_offset
== ~0ULL) {
1671 } else if (found
&& pos
!= start_offset
) {
1675 pos
= e
[i
].start
+ e
[i
].size
;
1677 } while (e
[i
-1].size
);
1682 if (dcnt
< raiddisks
) {
1684 fprintf(stderr
, Name
": imsm: Not enough "
1685 "devices with space for this array "
1692 /* This device must be a member of the set */
1693 if (stat(dev
, &stb
) < 0)
1695 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1697 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1698 if (dl
->major
== major(stb
.st_rdev
) &&
1699 dl
->minor
== minor(stb
.st_rdev
))
1704 fprintf(stderr
, Name
": %s is not in the "
1705 "same imsm set\n", dev
);
1708 e
= get_extents(super
, dl
);
1712 unsigned long long esize
;
1713 esize
= e
[i
].start
- pos
;
1714 if (esize
>= maxsize
)
1716 pos
= e
[i
].start
+ e
[i
].size
;
1718 } while (e
[i
-1].size
);
1719 *freesize
= maxsize
;
1724 int imsm_bbm_log_size(struct imsm_super
*mpb
)
1726 return __le32_to_cpu(mpb
->bbm_log_size
);
1729 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1730 int raiddisks
, int chunk
, unsigned long long size
,
1731 char *dev
, unsigned long long *freesize
,
1737 /* if given unused devices create a container
1738 * if given given devices in a container create a member volume
1740 if (level
== LEVEL_CONTAINER
) {
1741 /* Must be a fresh device to add to a container */
1742 return validate_geometry_imsm_container(st
, level
, layout
,
1743 raiddisks
, chunk
, size
,
1749 /* creating in a given container */
1750 return validate_geometry_imsm_volume(st
, level
, layout
,
1751 raiddisks
, chunk
, size
,
1752 dev
, freesize
, verbose
);
1755 /* limit creation to the following levels */
1767 /* This device needs to be a device in an 'imsm' container */
1768 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1772 Name
": Cannot create this array on device %s\n",
1777 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
1779 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1780 dev
, strerror(errno
));
1783 /* Well, it is in use by someone, maybe an 'imsm' container. */
1784 cfd
= open_container(fd
);
1788 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
1792 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
1794 if (sra
&& sra
->array
.major_version
== -1 &&
1795 strcmp(sra
->text_version
, "imsm") == 0) {
1796 /* This is a member of a imsm container. Load the container
1797 * and try to create a volume
1799 struct intel_super
*super
;
1801 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
1803 st
->container_dev
= fd2devnum(cfd
);
1805 return validate_geometry_imsm_volume(st
, level
, layout
,
1811 } else /* may belong to another container */
1817 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
1819 /* Given a container loaded by load_super_imsm_all,
1820 * extract information about all the arrays into
1823 * For each imsm_dev create an mdinfo, fill it in,
1824 * then look for matching devices in super->disks
1825 * and create appropriate device mdinfo.
1827 struct intel_super
*super
= st
->sb
;
1828 struct imsm_super
*mpb
= super
->anchor
;
1829 struct mdinfo
*rest
= NULL
;
1832 /* do not assemble arrays that might have bad blocks */
1833 if (imsm_bbm_log_size(super
->anchor
)) {
1834 fprintf(stderr
, Name
": BBM log found in metadata. "
1835 "Cannot activate array(s).\n");
1839 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1840 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
1841 struct imsm_vol
*vol
= &dev
->vol
;
1842 struct imsm_map
*map
= vol
->map
;
1843 struct mdinfo
*this;
1846 this = malloc(sizeof(*this));
1847 memset(this, 0, sizeof(*this));
1851 this->array
.level
= get_imsm_raid_level(map
);
1852 this->array
.raid_disks
= map
->num_members
;
1853 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
1854 this->array
.md_minor
= -1;
1855 this->array
.ctime
= 0;
1856 this->array
.utime
= 0;
1857 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1858 this->array
.state
= !vol
->dirty
;
1859 this->container_member
= i
;
1860 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1861 this->resync_start
= 0;
1863 this->resync_start
= ~0ULL;
1865 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1866 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
1868 sprintf(this->text_version
, "/%s/%d",
1869 devnum2devname(st
->container_dev
),
1870 this->container_member
);
1872 memset(this->uuid
, 0, sizeof(this->uuid
));
1874 this->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1876 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
1877 struct mdinfo
*info_d
;
1882 idx
= __le32_to_cpu(map
->disk_ord_tbl
[slot
] & ~(0xff << 24));
1883 for (d
= super
->disks
; d
; d
= d
->next
)
1884 if (d
->index
== idx
)
1888 break; /* shouldn't this be continue ?? */
1890 info_d
= malloc(sizeof(*info_d
));
1892 break; /* ditto ?? */
1893 memset(info_d
, 0, sizeof(*info_d
));
1894 info_d
->next
= this->devs
;
1895 this->devs
= info_d
;
1897 s
= __le32_to_cpu(d
->disk
.status
);
1899 info_d
->disk
.number
= d
->index
;
1900 info_d
->disk
.major
= d
->major
;
1901 info_d
->disk
.minor
= d
->minor
;
1902 info_d
->disk
.raid_disk
= slot
;
1903 info_d
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
1904 info_d
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
1905 info_d
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
1907 this->array
.working_disks
++;
1909 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
1910 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1911 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1913 strcpy(info_d
->name
, d
->devname
);
1921 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
1924 struct intel_super
*super
= c
->sb
;
1925 struct imsm_super
*mpb
= super
->anchor
;
1927 if (atoi(inst
) >= mpb
->num_raid_devs
) {
1928 fprintf(stderr
, "%s: subarry index %d, out of range\n",
1929 __func__
, atoi(inst
));
1933 dprintf("imsm: open_new %s\n", inst
);
1934 a
->info
.container_member
= atoi(inst
);
1938 static __u8
imsm_check_degraded(struct intel_super
*super
, int n
, int failed
)
1940 struct imsm_dev
*dev
= get_imsm_dev(super
, n
);
1941 struct imsm_map
*map
= dev
->vol
.map
;
1944 return map
->map_state
;
1946 switch (get_imsm_raid_level(map
)) {
1948 return IMSM_T_STATE_FAILED
;
1951 if (failed
< map
->num_members
)
1952 return IMSM_T_STATE_DEGRADED
;
1954 return IMSM_T_STATE_FAILED
;
1959 * check to see if any mirrors have failed,
1960 * otherwise we are degraded
1962 int device_per_mirror
= 2; /* FIXME is this always the case?
1963 * and are they always adjacent?
1968 for (i
= 0; i
< map
->num_members
; i
++) {
1969 int idx
= get_imsm_disk_idx(map
, i
);
1970 struct imsm_disk
*disk
= get_imsm_disk(super
, idx
);
1972 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1975 if (failed
>= device_per_mirror
)
1976 return IMSM_T_STATE_FAILED
;
1978 /* reset 'failed' for next mirror set */
1979 if (!((i
+ 1) % device_per_mirror
))
1983 return IMSM_T_STATE_DEGRADED
;
1987 return IMSM_T_STATE_DEGRADED
;
1989 return IMSM_T_STATE_FAILED
;
1995 return map
->map_state
;
1998 static int imsm_count_failed(struct intel_super
*super
, struct imsm_map
*map
)
2002 struct imsm_disk
*disk
;
2004 for (i
= 0; i
< map
->num_members
; i
++) {
2005 int idx
= get_imsm_disk_idx(map
, i
);
2007 disk
= get_imsm_disk(super
, idx
);
2008 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2015 static void imsm_set_array_state(struct active_array
*a
, int consistent
)
2017 int inst
= a
->info
.container_member
;
2018 struct intel_super
*super
= a
->container
->sb
;
2019 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2020 struct imsm_map
*map
= &dev
->vol
.map
[0];
2021 int dirty
= !consistent
;
2025 if (a
->resync_start
== ~0ULL) {
2026 failed
= imsm_count_failed(super
, map
);
2027 map_state
= imsm_check_degraded(super
, inst
, failed
);
2028 /* complete recovery or initial resync */
2030 map_state
= IMSM_T_STATE_NORMAL
;
2031 if (map
->map_state
!= map_state
) {
2032 dprintf("imsm: map_state %d: %d\n",
2034 map
->map_state
= map_state
;
2035 super
->updates_pending
++;
2038 /* complete resync */
2039 if (!dirty
&& dev
->vol
.dirty
) {
2040 dprintf("imsm: mark 'clean'\n");
2042 super
->updates_pending
++;
2048 if (dirty
&& !dev
->vol
.dirty
) {
2049 dprintf("imsm: mark 'dirty' (%llu)\n", a
->resync_start
);
2051 super
->updates_pending
++;
2055 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2057 int inst
= a
->info
.container_member
;
2058 struct intel_super
*super
= a
->container
->sb
;
2059 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2060 struct imsm_map
*map
= dev
->vol
.map
;
2061 struct imsm_disk
*disk
;
2064 int new_failure
= 0;
2066 if (n
> map
->num_members
)
2067 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2068 n
, map
->num_members
- 1);
2073 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2075 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, n
));
2077 /* check for new failures */
2078 status
= __le32_to_cpu(disk
->status
);
2079 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2080 status
|= FAILED_DISK
;
2081 disk
->status
= __cpu_to_le32(status
);
2083 super
->updates_pending
++;
2086 /* the number of failures have changed, count up 'failed' to determine
2087 * degraded / failed status
2089 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
2090 failed
= imsm_count_failed(super
, map
);
2092 /* determine map_state based on failed or in_sync count */
2094 map
->map_state
= imsm_check_degraded(super
, inst
, failed
);
2095 else if (map
->map_state
== IMSM_T_STATE_DEGRADED
) {
2099 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2100 if (d
->curr_state
& DS_INSYNC
)
2103 if (working
== a
->info
.array
.raid_disks
) {
2104 map
->map_state
= IMSM_T_STATE_NORMAL
;
2105 super
->updates_pending
++;
2110 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2112 struct imsm_super
*mpb
= super
->anchor
;
2113 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2114 unsigned long long dsize
;
2115 unsigned long long sectors
;
2117 get_dev_size(fd
, NULL
, &dsize
);
2119 if (mpb_size
> 512) {
2120 /* -1 to account for anchor */
2121 sectors
= mpb_sectors(mpb
) - 1;
2123 /* write the extended mpb to the sectors preceeding the anchor */
2124 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2127 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2131 /* first block is stored on second to last sector of the disk */
2132 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2135 if (write(fd
, super
->buf
, 512) != 512)
2141 static void imsm_sync_metadata(struct supertype
*container
)
2143 struct intel_super
*super
= container
->sb
;
2145 if (!super
->updates_pending
)
2148 write_super_imsm(super
, 0);
2150 super
->updates_pending
= 0;
2153 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2154 struct metadata_update
**updates
)
2157 * Take a device that is marked spare in the metadata and use it to
2158 * replace a failed/vacant slot in an array. There may be a case where
2159 * a device is failed in one array but active in a second.
2160 * imsm_process_update catches this case and does not clear the SPARE_DISK
2161 * flag, allowing the second array to start using the device on failure.
2162 * SPARE_DISK is cleared when all arrays are using a device.
2164 * FIXME: is this a valid use of SPARE_DISK?
2167 struct intel_super
*super
= a
->container
->sb
;
2168 int inst
= a
->info
.container_member
;
2169 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2170 struct imsm_map
*map
= dev
->vol
.map
;
2171 int failed
= a
->info
.array
.raid_disks
;
2172 struct mdinfo
*rv
= NULL
;
2175 struct metadata_update
*mu
;
2177 struct imsm_update_activate_spare
*u
;
2181 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2182 if ((d
->curr_state
& DS_FAULTY
) &&
2184 /* wait for Removal to happen */
2186 if (d
->state_fd
>= 0)
2190 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2191 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2192 if (imsm_check_degraded(super
, inst
, failed
) != IMSM_T_STATE_DEGRADED
)
2195 /* For each slot, if it is not working, find a spare */
2197 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2198 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2199 if (d
->disk
.raid_disk
== i
)
2201 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2202 if (d
&& (d
->state_fd
>= 0))
2205 /* OK, this device needs recovery. Find a spare */
2206 for ( ; dl
; dl
= dl
->next
) {
2207 unsigned long long esize
;
2208 unsigned long long pos
;
2211 struct imsm_disk
*disk
;
2216 /* If in this array, skip */
2217 for (d2
= a
->info
.devs
; d2
; d2
= d2
->next
)
2218 if (d2
->disk
.major
== dl
->major
&&
2219 d2
->disk
.minor
== dl
->minor
) {
2220 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2226 /* is this unused device marked as a spare? */
2227 disk
= get_imsm_disk(super
, dl
->index
);
2228 if (!(__le32_to_cpu(disk
->status
) & SPARE_DISK
))
2231 /* We are allowed to use this device - is there space?
2232 * We need a->info.component_size sectors */
2233 ex
= get_extents(super
, dl
);
2235 dprintf("cannot get extents\n");
2241 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2244 /* check that we can start at pba_of_lba0 with
2245 * a->info.component_size of space
2247 esize
= ex
[j
].start
- pos
;
2248 if (array_start
>= pos
&&
2249 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2253 pos
= ex
[j
].start
+ ex
[j
].size
;
2256 } while (ex
[j
-1].size
);
2260 dprintf("%x:%x does not have %llu at %d\n",
2261 dl
->major
, dl
->minor
,
2262 a
->info
.component_size
,
2263 __le32_to_cpu(map
->pba_of_lba0
));
2268 /* found a usable disk with enough space */
2269 di
= malloc(sizeof(*di
));
2270 memset(di
, 0, sizeof(*di
));
2271 di
->disk
.number
= dl
->index
;
2272 di
->disk
.raid_disk
= i
;
2273 di
->disk
.major
= dl
->major
;
2274 di
->disk
.minor
= dl
->minor
;
2276 di
->data_offset
= array_start
;
2277 di
->component_size
= a
->info
.component_size
;
2278 di
->container_member
= inst
;
2282 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2290 /* No spares found */
2292 /* Now 'rv' has a list of devices to return.
2293 * Create a metadata_update record to update the
2294 * disk_ord_tbl for the array
2296 mu
= malloc(sizeof(*mu
));
2297 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2299 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2300 mu
->next
= *updates
;
2301 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2303 for (di
= rv
; di
; di
= di
->next
) {
2304 u
->type
= update_activate_spare
;
2305 u
->disk_idx
= di
->disk
.number
;
2306 u
->slot
= di
->disk
.raid_disk
;
2317 static int weight(unsigned int field
)
2321 for (weight
= 0; field
; weight
++)
2327 static int disks_overlap(struct imsm_map
*m1
, struct imsm_map
*m2
)
2333 for (i
= 0; i
< m1
->num_members
; i
++) {
2334 idx
= get_imsm_disk_idx(m1
, i
);
2335 for (j
= 0; j
< m2
->num_members
; j
++)
2336 if (idx
== get_imsm_disk_idx(m2
, j
))
2343 static void imsm_process_update(struct supertype
*st
,
2344 struct metadata_update
*update
)
2347 * crack open the metadata_update envelope to find the update record
2348 * update can be one of:
2349 * update_activate_spare - a spare device has replaced a failed
2350 * device in an array, update the disk_ord_tbl. If this disk is
2351 * present in all member arrays then also clear the SPARE_DISK
2354 struct intel_super
*super
= st
->sb
;
2355 struct imsm_super
*mpb
= super
->anchor
;
2356 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2359 case update_activate_spare
: {
2360 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
2361 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
2362 struct imsm_map
*map
= &dev
->vol
.map
[0];
2363 struct active_array
*a
;
2364 struct imsm_disk
*disk
;
2368 unsigned int members
;
2373 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2374 if (dl
->index
== u
->disk_idx
)
2378 fprintf(stderr
, "error: imsm_activate_spare passed "
2379 "an unknown disk_idx: %d\n", u
->disk_idx
);
2383 super
->updates_pending
++;
2385 victim
= get_imsm_disk_idx(map
, u
->slot
);
2386 map
->disk_ord_tbl
[u
->slot
] = __cpu_to_le32(u
->disk_idx
);
2387 disk
= get_imsm_disk(super
, u
->disk_idx
);
2388 status
= __le32_to_cpu(disk
->status
);
2389 status
|= CONFIGURED_DISK
;
2390 disk
->status
= __cpu_to_le32(status
);
2392 /* map unique/live arrays using the spare */
2395 for (a
= st
->arrays
; a
; a
= a
->next
) {
2396 int inst
= a
->info
.container_member
;
2398 dev
= get_imsm_dev(super
, inst
);
2399 map
= &dev
->vol
.map
[0];
2400 if (map
->raid_level
> 0)
2401 members
|= 1 << inst
;
2402 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2403 if (d
->disk
.major
== dl
->major
&&
2404 d
->disk
.minor
== dl
->minor
)
2408 /* until all arrays that can absorb this disk have absorbed
2409 * this disk it can still be considered a spare
2411 if (weight(found
) >= weight(members
)) {
2412 status
= __le32_to_cpu(disk
->status
);
2413 status
&= ~SPARE_DISK
;
2414 disk
->status
= __cpu_to_le32(status
);
2417 /* count arrays using the victim in the metadata */
2419 for (a
= st
->arrays
; a
; a
= a
->next
) {
2420 dev
= get_imsm_dev(super
, a
->info
.container_member
);
2421 map
= &dev
->vol
.map
[0];
2422 for (i
= 0; i
< map
->num_members
; i
++)
2423 if (victim
== get_imsm_disk_idx(map
, i
))
2427 /* clear some flags if the victim is no longer being
2430 disk
= get_imsm_disk(super
, victim
);
2432 status
= __le32_to_cpu(disk
->status
);
2433 status
&= ~(CONFIGURED_DISK
| USABLE_DISK
);
2434 disk
->status
= __cpu_to_le32(status
);
2438 case update_create_array
: {
2439 /* someone wants to create a new array, we need to be aware of
2440 * a few races/collisions:
2441 * 1/ 'Create' called by two separate instances of mdadm
2442 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
2443 * devices that have since been assimilated via
2445 * In the event this update can not be carried out mdadm will
2446 * (FIX ME) notice that its update did not take hold.
2448 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2449 struct imsm_dev
*dev
;
2450 struct imsm_map
*map
, *new_map
;
2451 unsigned long long start
, end
;
2452 unsigned long long new_start
, new_end
;
2456 /* handle racing creates: first come first serve */
2457 if (u
->dev_idx
< mpb
->num_raid_devs
) {
2458 dprintf("%s: subarray %d already defined\n",
2459 __func__
, u
->dev_idx
);
2463 /* check update is next in sequence */
2464 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
2465 dprintf("%s: can not create arrays out of sequence\n",
2470 new_map
= &u
->dev
.vol
.map
[0];
2471 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
2472 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
2474 /* handle activate_spare versus create race:
2475 * check to make sure that overlapping arrays do not include
2478 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2479 dev
= get_imsm_dev(super
, i
);
2480 map
= &dev
->vol
.map
[0];
2481 start
= __le32_to_cpu(map
->pba_of_lba0
);
2482 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
2483 if ((new_start
>= start
&& new_start
<= end
) ||
2484 (start
>= new_start
&& start
<= new_end
))
2486 if (overlap
&& disks_overlap(map
, new_map
)) {
2487 dprintf("%s: arrays overlap\n", __func__
);
2491 /* check num_members sanity */
2492 if (new_map
->num_members
> mpb
->num_disks
) {
2493 dprintf("%s: num_disks out of range\n", __func__
);
2497 /* check that prepare update was successful */
2498 if (!update
->space
) {
2499 dprintf("%s: prepare update failed\n", __func__
);
2503 super
->updates_pending
++;
2504 dev
= update
->space
;
2505 update
->space
= NULL
;
2506 imsm_copy_dev(dev
, &u
->dev
);
2507 super
->dev_tbl
[u
->dev_idx
] = dev
;
2508 mpb
->num_raid_devs
++;
2510 /* fix up flags, if arrays overlap then the drives can not be
2513 for (i
= 0; i
< map
->num_members
; i
++) {
2514 struct imsm_disk
*disk
;
2517 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, i
));
2518 status
= __le32_to_cpu(disk
->status
);
2519 status
|= CONFIGURED_DISK
;
2521 status
&= ~SPARE_DISK
;
2522 disk
->status
= __cpu_to_le32(status
);
2529 static void imsm_prepare_update(struct supertype
*st
,
2530 struct metadata_update
*update
)
2533 * Allocate space to hold new disk entries, raid-device entries or a
2534 * new mpb if necessary. We currently maintain an mpb large enough to
2535 * hold 2 subarrays for the given number of disks. This may not be
2536 * sufficient when reshaping.
2538 * FIX ME handle the reshape case.
2540 * The monitor will be able to safely change super->mpb by arranging
2541 * for it to be freed in check_update_queue(). I.e. the monitor thread
2542 * will start using the new pointer and the manager can continue to use
2543 * the old value until check_update_queue() runs.
2545 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2548 case update_create_array
: {
2549 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2550 size_t len
= sizeof_imsm_dev(&u
->dev
);
2552 update
->space
= malloc(len
);
2562 struct superswitch super_imsm
= {
2564 .examine_super
= examine_super_imsm
,
2565 .brief_examine_super
= brief_examine_super_imsm
,
2566 .detail_super
= detail_super_imsm
,
2567 .brief_detail_super
= brief_detail_super_imsm
,
2568 .write_init_super
= write_init_super_imsm
,
2570 .match_home
= match_home_imsm
,
2571 .uuid_from_super
= uuid_from_super_imsm
,
2572 .getinfo_super
= getinfo_super_imsm
,
2573 .update_super
= update_super_imsm
,
2575 .avail_size
= avail_size_imsm
,
2577 .compare_super
= compare_super_imsm
,
2579 .load_super
= load_super_imsm
,
2580 .init_super
= init_super_imsm
,
2581 .add_to_super
= add_to_super_imsm
,
2582 .store_super
= store_zero_imsm
,
2583 .free_super
= free_super_imsm
,
2584 .match_metadata_desc
= match_metadata_desc_imsm
,
2585 .container_content
= container_content_imsm
,
2587 .validate_geometry
= validate_geometry_imsm
,
2591 .open_new
= imsm_open_new
,
2592 .load_super
= load_super_imsm
,
2593 .set_array_state
= imsm_set_array_state
,
2594 .set_disk
= imsm_set_disk
,
2595 .sync_metadata
= imsm_sync_metadata
,
2596 .activate_spare
= imsm_activate_spare
,
2597 .process_update
= imsm_process_update
,
2598 .prepare_update
= imsm_prepare_update
,