2 * mdadm - Intel(R) Matrix Storage Manager Support
4 * Copyright (C) 2002-2008 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.
20 #define HAVE_STDINT_H 1
28 /* MPB == Metadata Parameter Block */
29 #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
30 #define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
31 #define MPB_VERSION_RAID0 "1.0.00"
32 #define MPB_VERSION_RAID1 "1.1.00"
33 #define MPB_VERSION_RAID5 "1.2.02"
34 #define MAX_SIGNATURE_LENGTH 32
35 #define MAX_RAID_SERIAL_LEN 16
36 #define MPB_SECTOR_CNT 418
37 #define IMSM_RESERVED_SECTORS 4096
39 /* Disk configuration info. */
40 #define IMSM_MAX_DEVICES 255
42 __u8 serial
[MAX_RAID_SERIAL_LEN
];/* 0xD8 - 0xE7 ascii serial number */
43 __u32 total_blocks
; /* 0xE8 - 0xEB total blocks */
44 __u32 scsi_id
; /* 0xEC - 0xEF scsi ID */
45 __u32 status
; /* 0xF0 - 0xF3 */
46 #define SPARE_DISK 0x01 /* Spare */
47 #define CONFIGURED_DISK 0x02 /* Member of some RaidDev */
48 #define FAILED_DISK 0x04 /* Permanent failure */
49 #define USABLE_DISK 0x08 /* Fully usable unless FAILED_DISK is set */
51 #define IMSM_DISK_FILLERS 5
52 __u32 filler
[IMSM_DISK_FILLERS
]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
55 /* RAID map configuration infos. */
57 __u32 pba_of_lba0
; /* start address of partition */
58 __u32 blocks_per_member
;/* blocks per member */
59 __u32 num_data_stripes
; /* number of data stripes */
60 __u16 blocks_per_strip
;
61 __u8 map_state
; /* Normal, Uninitialized, Degraded, Failed */
62 #define IMSM_T_STATE_NORMAL 0
63 #define IMSM_T_STATE_UNINITIALIZED 1
64 #define IMSM_T_STATE_DEGRADED 2 /* FIXME: is this correct? */
65 #define IMSM_T_STATE_FAILED 3 /* FIXME: is this correct? */
67 #define IMSM_T_RAID0 0
68 #define IMSM_T_RAID1 1
69 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
70 __u8 num_members
; /* number of member disks */
72 __u32 filler
[7]; /* expansion area */
73 #define IMSM_ORD_REBUILD (1 << 24)
74 __u32 disk_ord_tbl
[1]; /* disk_ord_tbl[num_members],
75 * top byte contains some flags
77 } __attribute__ ((packed
));
82 __u8 migr_state
; /* Normal or Migrating */
83 __u8 migr_type
; /* Initializing, Rebuilding, ... */
87 struct imsm_map map
[1];
88 /* here comes another one if migr_state */
89 } __attribute__ ((packed
));
92 __u8 volume
[MAX_RAID_SERIAL_LEN
];
95 __u32 status
; /* Persistent RaidDev status */
96 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
97 #define IMSM_DEV_FILLERS 12
98 __u32 filler
[IMSM_DEV_FILLERS
];
100 } __attribute__ ((packed
));
103 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
104 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
105 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
106 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
107 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
108 __u32 error_log_size
; /* 0x30 - 0x33 in bytes */
109 __u32 attributes
; /* 0x34 - 0x37 */
110 __u8 num_disks
; /* 0x38 Number of configured disks */
111 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
112 __u8 error_log_pos
; /* 0x3A */
113 __u8 fill
[1]; /* 0x3B */
114 __u32 cache_size
; /* 0x3c - 0x40 in mb */
115 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
116 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
117 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
118 #define IMSM_FILLERS 35
119 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
120 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
121 /* here comes imsm_dev[num_raid_devs] */
122 /* here comes BBM logs */
123 } __attribute__ ((packed
));
125 #define BBM_LOG_MAX_ENTRIES 254
127 struct bbm_log_entry
{
128 __u64 defective_block_start
;
129 #define UNREADABLE 0xFFFFFFFF
130 __u32 spare_block_offset
;
131 __u16 remapped_marked_count
;
133 } __attribute__ ((__packed__
));
136 __u32 signature
; /* 0xABADB10C */
138 __u32 reserved_spare_block_count
; /* 0 */
139 __u32 reserved
; /* 0xFFFF */
140 __u64 first_spare_lba
;
141 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
142 } __attribute__ ((__packed__
));
146 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
149 static unsigned int sector_count(__u32 bytes
)
151 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
154 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
156 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
159 /* internal representation of IMSM metadata */
162 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
163 struct imsm_super
*anchor
; /* immovable parameters */
165 size_t len
; /* size of the 'buf' allocation */
166 void *next_buf
; /* for realloc'ing buf from the manager */
168 int updates_pending
; /* count of pending updates for mdmon */
169 int creating_imsm
; /* flag to indicate container creation */
170 int current_vol
; /* index of raid device undergoing creation */
171 #define IMSM_MAX_RAID_DEVS 2
172 struct imsm_dev
*dev_tbl
[IMSM_MAX_RAID_DEVS
];
176 __u8 serial
[MAX_RAID_SERIAL_LEN
];
179 struct imsm_disk disk
;
182 struct dl
*add
; /* list of disks to add while mdmon active */
183 struct dl
*missing
; /* disks removed while we weren't looking */
184 struct bbm_log
*bbm_log
;
188 unsigned long long start
, size
;
191 /* definition of messages passed to imsm_process_update */
192 enum imsm_update_type
{
193 update_activate_spare
,
198 struct imsm_update_activate_spare
{
199 enum imsm_update_type type
;
203 struct imsm_update_activate_spare
*next
;
206 struct imsm_update_create_array
{
207 enum imsm_update_type type
;
212 struct imsm_update_add_disk
{
213 enum imsm_update_type type
;
216 static struct supertype
*match_metadata_desc_imsm(char *arg
)
218 struct supertype
*st
;
220 if (strcmp(arg
, "imsm") != 0 &&
221 strcmp(arg
, "default") != 0
225 st
= malloc(sizeof(*st
));
226 memset(st
, 0, sizeof(*st
));
227 st
->ss
= &super_imsm
;
228 st
->max_devs
= IMSM_MAX_DEVICES
;
229 st
->minor_version
= 0;
235 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
237 return &mpb
->sig
[MPB_SIG_LEN
];
241 /* retrieve a disk directly from the anchor when the anchor is known to be
242 * up-to-date, currently only at load time
244 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
246 if (index
>= mpb
->num_disks
)
248 return &mpb
->disk
[index
];
252 /* retrieve a disk from the parsed metadata */
253 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
257 for (d
= super
->disks
; d
; d
= d
->next
)
258 if (d
->index
== index
)
265 /* generate a checksum directly from the anchor when the anchor is known to be
266 * up-to-date, currently only at load or write_super after coalescing
268 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
270 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
271 __u32
*p
= (__u32
*) mpb
;
275 sum
+= __le32_to_cpu(*p
++);
277 return sum
- __le32_to_cpu(mpb
->check_sum
);
280 static size_t sizeof_imsm_map(struct imsm_map
*map
)
282 return sizeof(struct imsm_map
) + sizeof(__u32
) * (map
->num_members
- 1);
285 struct imsm_map
*get_imsm_map(struct imsm_dev
*dev
, int second_map
)
287 struct imsm_map
*map
= &dev
->vol
.map
[0];
289 if (second_map
&& !dev
->vol
.migr_state
)
291 else if (second_map
) {
294 return ptr
+ sizeof_imsm_map(map
);
300 /* return the size of the device.
301 * migr_state increases the returned size if map[0] were to be duplicated
303 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
, int migr_state
)
305 size_t size
= sizeof(*dev
) - sizeof(struct imsm_map
) +
306 sizeof_imsm_map(get_imsm_map(dev
, 0));
308 /* migrating means an additional map */
309 if (dev
->vol
.migr_state
)
310 size
+= sizeof_imsm_map(get_imsm_map(dev
, 1));
312 size
+= sizeof_imsm_map(get_imsm_map(dev
, 0));
317 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
323 if (index
>= mpb
->num_raid_devs
)
326 /* devices start after all disks */
327 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
329 for (i
= 0; i
<= index
; i
++)
331 return _mpb
+ offset
;
333 offset
+= sizeof_imsm_dev(_mpb
+ offset
, 0);
338 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
340 if (index
>= super
->anchor
->num_raid_devs
)
342 return super
->dev_tbl
[index
];
345 static __u32
get_imsm_ord_tbl_ent(struct imsm_dev
*dev
, int slot
)
347 struct imsm_map
*map
;
349 if (dev
->vol
.migr_state
)
350 map
= get_imsm_map(dev
, 1);
352 map
= get_imsm_map(dev
, 0);
354 /* top byte identifies disk under rebuild */
355 return __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
358 #define ord_to_idx(ord) (((ord) << 8) >> 8)
359 static __u32
get_imsm_disk_idx(struct imsm_dev
*dev
, int slot
)
361 __u32 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
363 return ord_to_idx(ord
);
366 static void set_imsm_ord_tbl_ent(struct imsm_map
*map
, int slot
, __u32 ord
)
368 map
->disk_ord_tbl
[slot
] = __cpu_to_le32(ord
);
371 static int get_imsm_raid_level(struct imsm_map
*map
)
373 if (map
->raid_level
== 1) {
374 if (map
->num_members
== 2)
380 return map
->raid_level
;
383 static int cmp_extent(const void *av
, const void *bv
)
385 const struct extent
*a
= av
;
386 const struct extent
*b
= bv
;
387 if (a
->start
< b
->start
)
389 if (a
->start
> b
->start
)
394 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
396 /* find a list of used extents on the given physical device */
397 struct extent
*rv
, *e
;
400 __u32 reservation
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
402 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
403 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
404 struct imsm_map
*map
= get_imsm_map(dev
, 0);
406 for (j
= 0; j
< map
->num_members
; j
++) {
407 __u32 index
= get_imsm_disk_idx(dev
, j
);
409 if (index
== dl
->index
)
413 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
418 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
419 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
420 struct imsm_map
*map
= get_imsm_map(dev
, 0);
422 for (j
= 0; j
< map
->num_members
; j
++) {
423 __u32 index
= get_imsm_disk_idx(dev
, j
);
425 if (index
== dl
->index
) {
426 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
427 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
432 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
434 /* determine the start of the metadata
435 * when no raid devices are defined use the default
436 * ...otherwise allow the metadata to truncate the value
437 * as is the case with older versions of imsm
440 struct extent
*last
= &rv
[memberships
- 1];
443 remainder
= __le32_to_cpu(dl
->disk
.total_blocks
) -
444 (last
->start
+ last
->size
);
445 if (reservation
> remainder
)
446 reservation
= remainder
;
448 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) - reservation
;
453 /* try to determine how much space is reserved for metadata from
454 * the last get_extents() entry, otherwise fallback to the
457 static __u32
imsm_reserved_sectors(struct intel_super
*super
, struct dl
*dl
)
463 /* for spares just return a minimal reservation which will grow
464 * once the spare is picked up by an array
467 return MPB_SECTOR_CNT
;
469 e
= get_extents(super
, dl
);
471 return MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
473 /* scroll to last entry */
474 for (i
= 0; e
[i
].size
; i
++)
477 rv
= __le32_to_cpu(dl
->disk
.total_blocks
) - e
[i
].start
;
485 static void print_imsm_dev(struct imsm_dev
*dev
, char *uuid
, int disk_idx
)
489 struct imsm_map
*map
= get_imsm_map(dev
, 0);
493 printf("[%.16s]:\n", dev
->volume
);
494 printf(" UUID : %s\n", uuid
);
495 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
496 printf(" Members : %d\n", map
->num_members
);
497 for (slot
= 0; slot
< map
->num_members
; slot
++)
498 if (disk_idx
== get_imsm_disk_idx(dev
, slot
))
500 if (slot
< map
->num_members
) {
501 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
502 printf(" This Slot : %d%s\n", slot
,
503 ord
& IMSM_ORD_REBUILD
? " (out-of-sync)" : "");
505 printf(" This Slot : ?\n");
506 sz
= __le32_to_cpu(dev
->size_high
);
508 sz
+= __le32_to_cpu(dev
->size_low
);
509 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
510 human_size(sz
* 512));
511 sz
= __le32_to_cpu(map
->blocks_per_member
);
512 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
513 human_size(sz
* 512));
514 printf(" Sector Offset : %u\n",
515 __le32_to_cpu(map
->pba_of_lba0
));
516 printf(" Num Stripes : %u\n",
517 __le32_to_cpu(map
->num_data_stripes
));
518 printf(" Chunk Size : %u KiB\n",
519 __le16_to_cpu(map
->blocks_per_strip
) / 2);
520 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
521 printf(" Migrate State : %s", dev
->vol
.migr_state
? "migrating" : "idle");
522 if (dev
->vol
.migr_state
)
523 printf(": %s", dev
->vol
.migr_type
? "rebuilding" : "initializing");
525 printf(" Map State : %s", map_state_str
[map
->map_state
]);
526 if (dev
->vol
.migr_state
) {
527 struct imsm_map
*map
= get_imsm_map(dev
, 1);
528 printf(" <-- %s", map_state_str
[map
->map_state
]);
531 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
534 static void print_imsm_disk(struct imsm_super
*mpb
, int index
, __u32 reserved
)
536 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
537 char str
[MAX_RAID_SERIAL_LEN
+ 1];
545 snprintf(str
, MAX_RAID_SERIAL_LEN
+ 1, "%s", disk
->serial
);
546 printf(" Disk%02d Serial : %s\n", index
, str
);
547 s
= __le32_to_cpu(disk
->status
);
548 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
549 s
&CONFIGURED_DISK
? " active" : "",
550 s
&FAILED_DISK
? " failed" : "",
551 s
&USABLE_DISK
? " usable" : "");
552 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
553 sz
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
554 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
555 human_size(sz
* 512));
558 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
);
560 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
562 struct intel_super
*super
= st
->sb
;
563 struct imsm_super
*mpb
= super
->anchor
;
564 char str
[MAX_SIGNATURE_LENGTH
];
569 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
572 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
573 printf(" Magic : %s\n", str
);
574 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
575 printf(" Version : %s\n", get_imsm_version(mpb
));
576 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
577 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
578 getinfo_super_imsm(st
, &info
);
579 fname_from_uuid(st
, &info
, nbuf
,'-');
580 printf(" UUID : %s\n", nbuf
+ 5);
581 sum
= __le32_to_cpu(mpb
->check_sum
);
582 printf(" Checksum : %08x %s\n", sum
,
583 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
584 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
585 printf(" Disks : %d\n", mpb
->num_disks
);
586 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
587 print_imsm_disk(mpb
, super
->disks
->index
, reserved
);
588 if (super
->bbm_log
) {
589 struct bbm_log
*log
= super
->bbm_log
;
592 printf("Bad Block Management Log:\n");
593 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
594 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
595 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
596 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
597 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
599 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
601 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
603 super
->current_vol
= i
;
604 getinfo_super_imsm(st
, &info
);
605 fname_from_uuid(st
, &info
, nbuf
, '-');
606 print_imsm_dev(dev
, nbuf
+ 5, super
->disks
->index
);
608 for (i
= 0; i
< mpb
->num_disks
; i
++) {
609 if (i
== super
->disks
->index
)
611 print_imsm_disk(mpb
, i
, reserved
);
615 static void brief_examine_super_imsm(struct supertype
*st
)
617 /* We just write a generic IMSM ARRAY entry */
621 struct intel_super
*super
= st
->sb
;
624 if (!super
->anchor
->num_raid_devs
)
627 getinfo_super_imsm(st
, &info
);
628 fname_from_uuid(st
, &info
, nbuf
,'-');
629 printf("ARRAY metadata=imsm auto=md UUID=%s\n", nbuf
+ 5);
630 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
631 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
633 super
->current_vol
= i
;
634 getinfo_super_imsm(st
, &info
);
635 fname_from_uuid(st
, &info
, nbuf1
,'-');
636 printf("ARRAY /dev/md/%.16s container=%s\n"
637 " member=%d auto=mdp UUID=%s\n",
638 dev
->volume
, nbuf
+ 5, i
, nbuf1
+ 5);
642 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
647 getinfo_super_imsm(st
, &info
);
648 fname_from_uuid(st
, &info
, nbuf
,'-');
649 printf("\n UUID : %s\n", nbuf
+ 5);
652 static void brief_detail_super_imsm(struct supertype
*st
)
656 getinfo_super_imsm(st
, &info
);
657 fname_from_uuid(st
, &info
, nbuf
,'-');
658 printf(" UUID=%s", nbuf
+ 5);
662 static int match_home_imsm(struct supertype
*st
, char *homehost
)
664 printf("%s\n", __FUNCTION__
);
669 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
671 /* The uuid returned here is used for:
672 * uuid to put into bitmap file (Create, Grow)
673 * uuid for backup header when saving critical section (Grow)
674 * comparing uuids when re-adding a device into an array
675 * In these cases the uuid required is that of the data-array,
676 * not the device-set.
677 * uuid to recognise same set when adding a missing device back
678 * to an array. This is a uuid for the device-set.
680 * For each of these we can make do with a truncated
681 * or hashed uuid rather than the original, as long as
683 * In each case the uuid required is that of the data-array,
684 * not the device-set.
686 /* imsm does not track uuid's so we synthesis one using sha1 on
687 * - The signature (Which is constant for all imsm array, but no matter)
688 * - the family_num of the container
689 * - the index number of the volume
690 * - the 'serial' number of the volume.
691 * Hopefully these are all constant.
693 struct intel_super
*super
= st
->sb
;
697 struct imsm_dev
*dev
= NULL
;
700 sha1_process_bytes(super
->anchor
->sig
, MAX_SIGNATURE_LENGTH
, &ctx
);
701 sha1_process_bytes(&super
->anchor
->family_num
, sizeof(__u32
), &ctx
);
702 if (super
->current_vol
>= 0)
703 dev
= get_imsm_dev(super
, super
->current_vol
);
705 __u32 vol
= super
->current_vol
;
706 sha1_process_bytes(&vol
, sizeof(vol
), &ctx
);
707 sha1_process_bytes(dev
->volume
, MAX_RAID_SERIAL_LEN
, &ctx
);
709 sha1_finish_ctx(&ctx
, buf
);
710 memcpy(uuid
, buf
, 4*4);
715 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
717 __u8
*v
= get_imsm_version(mpb
);
718 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
719 char major
[] = { 0, 0, 0 };
720 char minor
[] = { 0 ,0, 0 };
721 char patch
[] = { 0, 0, 0 };
722 char *ver_parse
[] = { major
, minor
, patch
};
726 while (*v
!= '\0' && v
< end
) {
727 if (*v
!= '.' && j
< 2)
728 ver_parse
[i
][j
++] = *v
;
736 *m
= strtol(minor
, NULL
, 0);
737 *p
= strtol(patch
, NULL
, 0);
741 static int imsm_level_to_layout(int level
)
749 return ALGORITHM_LEFT_ASYMMETRIC
;
756 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
758 struct intel_super
*super
= st
->sb
;
759 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
760 struct imsm_map
*map
= get_imsm_map(dev
, 0);
762 info
->container_member
= super
->current_vol
;
763 info
->array
.raid_disks
= map
->num_members
;
764 info
->array
.level
= get_imsm_raid_level(map
);
765 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
766 info
->array
.md_minor
= -1;
767 info
->array
.ctime
= 0;
768 info
->array
.utime
= 0;
769 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
770 info
->array
.state
= !dev
->vol
.dirty
;
772 info
->disk
.major
= 0;
773 info
->disk
.minor
= 0;
775 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
776 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
777 memset(info
->uuid
, 0, sizeof(info
->uuid
));
779 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
780 info
->resync_start
= 0;
781 else if (dev
->vol
.migr_state
)
782 info
->resync_start
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
784 info
->resync_start
= ~0ULL;
786 strncpy(info
->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
787 info
->name
[MAX_RAID_SERIAL_LEN
] = 0;
789 info
->array
.major_version
= -1;
790 info
->array
.minor_version
= -2;
791 sprintf(info
->text_version
, "/%s/%d",
792 devnum2devname(st
->container_dev
),
793 info
->container_member
);
794 info
->safe_mode_delay
= 4000; /* 4 secs like the Matrix driver */
795 uuid_from_super_imsm(st
, info
->uuid
);
799 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
801 struct intel_super
*super
= st
->sb
;
802 struct imsm_disk
*disk
;
805 if (super
->current_vol
>= 0) {
806 getinfo_super_imsm_volume(st
, info
);
810 /* Set raid_disks to zero so that Assemble will always pull in valid
813 info
->array
.raid_disks
= 0;
814 info
->array
.level
= LEVEL_CONTAINER
;
815 info
->array
.layout
= 0;
816 info
->array
.md_minor
= -1;
817 info
->array
.ctime
= 0; /* N/A for imsm */
818 info
->array
.utime
= 0;
819 info
->array
.chunk_size
= 0;
821 info
->disk
.major
= 0;
822 info
->disk
.minor
= 0;
823 info
->disk
.raid_disk
= -1;
824 info
->reshape_active
= 0;
825 info
->array
.major_version
= -1;
826 info
->array
.minor_version
= -2;
827 strcpy(info
->text_version
, "imsm");
828 info
->safe_mode_delay
= 0;
829 info
->disk
.number
= -1;
830 info
->disk
.state
= 0;
834 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
836 disk
= &super
->disks
->disk
;
837 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
838 info
->component_size
= reserved
;
839 s
= __le32_to_cpu(disk
->status
);
840 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
841 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
842 info
->disk
.state
|= s
& SPARE_DISK
? 0 : (1 << MD_DISK_SYNC
);
845 /* only call uuid_from_super_imsm when this disk is part of a populated container,
846 * ->compare_super may have updated the 'num_raid_devs' field for spares
848 if (info
->disk
.state
& (1 << MD_DISK_SYNC
) || super
->anchor
->num_raid_devs
)
849 uuid_from_super_imsm(st
, info
->uuid
);
851 memcpy(info
->uuid
, uuid_match_any
, sizeof(int[4]));
854 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
855 char *update
, char *devname
, int verbose
,
856 int uuid_set
, char *homehost
)
860 /* For 'assemble' and 'force' we need to return non-zero if any
861 * change was made. For others, the return value is ignored.
862 * Update options are:
863 * force-one : This device looks a bit old but needs to be included,
864 * update age info appropriately.
865 * assemble: clear any 'faulty' flag to allow this device to
867 * force-array: Array is degraded but being forced, mark it clean
868 * if that will be needed to assemble it.
870 * newdev: not used ????
871 * grow: Array has gained a new device - this is currently for
873 * resync: mark as dirty so a resync will happen.
874 * name: update the name - preserving the homehost
876 * Following are not relevant for this imsm:
877 * sparc2.2 : update from old dodgey metadata
878 * super-minor: change the preferred_minor number
879 * summaries: update redundant counters.
880 * uuid: Change the uuid of the array to match watch is given
881 * homehost: update the recorded homehost
882 * _reshape_progress: record new reshape_progress position.
885 //struct intel_super *super = st->sb;
886 //struct imsm_super *mpb = super->mpb;
888 if (strcmp(update
, "grow") == 0) {
890 if (strcmp(update
, "resync") == 0) {
891 /* dev->vol.dirty = 1; */
894 /* IMSM has no concept of UUID or homehost */
899 static size_t disks_to_mpb_size(int disks
)
903 size
= sizeof(struct imsm_super
);
904 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
905 size
+= 2 * sizeof(struct imsm_dev
);
906 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
907 size
+= (4 - 2) * sizeof(struct imsm_map
);
908 /* 4 possible disk_ord_tbl's */
909 size
+= 4 * (disks
- 1) * sizeof(__u32
);
914 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
916 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
919 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
922 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
926 * 0 same, or first was empty, and second was copied
927 * 1 second had wrong number
931 struct intel_super
*first
= st
->sb
;
932 struct intel_super
*sec
= tst
->sb
;
940 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
943 /* if an anchor does not have num_raid_devs set then it is a free
946 if (first
->anchor
->num_raid_devs
> 0 &&
947 sec
->anchor
->num_raid_devs
> 0) {
948 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
952 /* if 'first' is a spare promote it to a populated mpb with sec's
955 if (first
->anchor
->num_raid_devs
== 0 &&
956 sec
->anchor
->num_raid_devs
> 0) {
959 /* we need to copy raid device info from sec if an allocation
960 * fails here we don't associate the spare
962 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++) {
963 first
->dev_tbl
[i
] = malloc(sizeof(struct imsm_dev
));
964 if (!first
->dev_tbl
) {
966 free(first
->dev_tbl
[i
]);
967 first
->dev_tbl
[i
] = NULL
;
969 fprintf(stderr
, "imsm: failed to associate spare\n");
972 *first
->dev_tbl
[i
] = *sec
->dev_tbl
[i
];
975 first
->anchor
->num_raid_devs
= sec
->anchor
->num_raid_devs
;
976 first
->anchor
->family_num
= sec
->anchor
->family_num
;
982 static void fd2devname(int fd
, char *name
)
991 if (fstat(fd
, &st
) != 0)
993 sprintf(path
, "/sys/dev/block/%d:%d",
994 major(st
.st_rdev
), minor(st
.st_rdev
));
996 rv
= readlink(path
, dname
, sizeof(dname
));
1001 nm
= strrchr(dname
, '/');
1003 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
1007 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
1009 static int imsm_read_serial(int fd
, char *devname
,
1010 __u8 serial
[MAX_RAID_SERIAL_LEN
])
1012 unsigned char scsi_serial
[255];
1018 memset(scsi_serial
, 0, sizeof(scsi_serial
));
1020 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
1022 if (rv
&& check_env("IMSM_DEVNAME_AS_SERIAL")) {
1023 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1024 fd2devname(fd
, (char *) serial
);
1031 Name
": Failed to retrieve serial for %s\n",
1036 /* trim leading whitespace */
1037 rsp_len
= scsi_serial
[3];
1038 rsp_buf
= (char *) &scsi_serial
[4];
1043 /* truncate len to the end of rsp_buf if necessary */
1044 if (c
+ MAX_RAID_SERIAL_LEN
> rsp_buf
+ rsp_len
)
1045 len
= rsp_len
- (c
- rsp_buf
);
1047 len
= MAX_RAID_SERIAL_LEN
;
1049 /* initialize the buffer and copy rsp_buf characters */
1050 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1051 memcpy(serial
, c
, len
);
1053 /* trim trailing whitespace starting with the last character copied */
1054 c
= (char *) &serial
[len
- 1];
1055 while (isspace(*c
) || *c
== '\0')
1061 static int serialcmp(__u8
*s1
, __u8
*s2
)
1063 return strncmp((char *) s1
, (char *) s2
, MAX_RAID_SERIAL_LEN
);
1066 static void serialcpy(__u8
*dest
, __u8
*src
)
1068 strncpy((char *) dest
, (char *) src
, MAX_RAID_SERIAL_LEN
);
1072 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
1079 __u8 serial
[MAX_RAID_SERIAL_LEN
];
1081 rv
= imsm_read_serial(fd
, devname
, serial
);
1086 /* check if this is a disk we have seen before. it may be a spare in
1087 * super->disks while the current anchor believes it is a raid member,
1088 * check if we need to update dl->index
1090 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1091 if (serialcmp(dl
->serial
, serial
) == 0)
1095 dl
= malloc(sizeof(*dl
));
1102 Name
": failed to allocate disk buffer for %s\n",
1109 dl
->major
= major(stb
.st_rdev
);
1110 dl
->minor
= minor(stb
.st_rdev
);
1111 dl
->next
= super
->disks
;
1112 dl
->fd
= keep_fd
? fd
: -1;
1113 dl
->devname
= devname
? strdup(devname
) : NULL
;
1114 serialcpy(dl
->serial
, serial
);
1116 } else if (keep_fd
) {
1121 /* look up this disk's index in the current anchor */
1122 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
1123 struct imsm_disk
*disk_iter
;
1125 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
1127 if (serialcmp(disk_iter
->serial
, dl
->serial
) == 0) {
1130 dl
->disk
= *disk_iter
;
1131 status
= __le32_to_cpu(dl
->disk
.status
);
1132 /* only set index on disks that are a member of a
1133 * populated contianer, i.e. one with raid_devs
1135 if (status
& FAILED_DISK
)
1137 else if (status
& SPARE_DISK
)
1146 /* no match, maybe a stale failed drive */
1147 if (i
== super
->anchor
->num_disks
&& dl
->index
>= 0) {
1148 dl
->disk
= *__get_imsm_disk(super
->anchor
, dl
->index
);
1149 if (__le32_to_cpu(dl
->disk
.status
) & FAILED_DISK
)
1159 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
1161 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
1165 /* When migrating map0 contains the 'destination' state while map1
1166 * contains the current state. When not migrating map0 contains the
1167 * current state. This routine assumes that map[0].map_state is set to
1168 * the current array state before being called.
1170 * Migration is indicated by one of the following states
1171 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
1172 * 2/ Initialize (migr_state=1 migr_type=0 map0state=normal
1173 * map1state=unitialized)
1174 * 3/ Verify (Resync) (migr_state=1 migr_type=1 map0state=normal
1176 * 4/ Rebuild (migr_state=1 migr_type=1 map0state=normal
1177 * map1state=degraded)
1179 static void migrate(struct imsm_dev
*dev
, __u8 to_state
, int rebuild_resync
)
1181 struct imsm_map
*dest
;
1182 struct imsm_map
*src
= get_imsm_map(dev
, 0);
1184 dev
->vol
.migr_state
= 1;
1185 dev
->vol
.migr_type
= rebuild_resync
;
1186 dev
->vol
.curr_migr_unit
= 0;
1187 dest
= get_imsm_map(dev
, 1);
1189 memcpy(dest
, src
, sizeof_imsm_map(src
));
1190 src
->map_state
= to_state
;
1193 static void end_migration(struct imsm_dev
*dev
, __u8 map_state
)
1195 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1197 dev
->vol
.migr_state
= 0;
1198 dev
->vol
.curr_migr_unit
= 0;
1199 map
->map_state
= map_state
;
1203 static int parse_raid_devices(struct intel_super
*super
)
1206 struct imsm_dev
*dev_new
;
1207 size_t len
, len_migr
;
1208 size_t space_needed
= 0;
1209 struct imsm_super
*mpb
= super
->anchor
;
1211 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
1212 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
1214 len
= sizeof_imsm_dev(dev_iter
, 0);
1215 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
1217 space_needed
+= len_migr
- len
;
1219 dev_new
= malloc(len_migr
);
1222 imsm_copy_dev(dev_new
, dev_iter
);
1223 super
->dev_tbl
[i
] = dev_new
;
1226 /* ensure that super->buf is large enough when all raid devices
1229 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
1232 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
1233 if (posix_memalign(&buf
, 512, len
) != 0)
1236 memcpy(buf
, super
->buf
, len
);
1245 /* retrieve a pointer to the bbm log which starts after all raid devices */
1246 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
1250 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
1252 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
1258 static void __free_imsm(struct intel_super
*super
, int free_disks
);
1260 /* load_imsm_mpb - read matrix metadata
1261 * allocates super->mpb to be freed by free_super
1263 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
1265 unsigned long long dsize
;
1266 unsigned long long sectors
;
1268 struct imsm_super
*anchor
;
1272 get_dev_size(fd
, NULL
, &dsize
);
1274 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
1277 Name
": Cannot seek to anchor block on %s: %s\n",
1278 devname
, strerror(errno
));
1282 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
1285 Name
": Failed to allocate imsm anchor buffer"
1286 " on %s\n", devname
);
1289 if (read(fd
, anchor
, 512) != 512) {
1292 Name
": Cannot read anchor block on %s: %s\n",
1293 devname
, strerror(errno
));
1298 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1301 Name
": no IMSM anchor on %s\n", devname
);
1306 __free_imsm(super
, 0);
1307 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1308 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1311 Name
": unable to allocate %zu byte mpb buffer\n",
1316 memcpy(super
->buf
, anchor
, 512);
1318 sectors
= mpb_sectors(anchor
) - 1;
1321 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1323 rc
= parse_raid_devices(super
);
1327 /* read the extended mpb */
1328 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1331 Name
": Cannot seek to extended mpb on %s: %s\n",
1332 devname
, strerror(errno
));
1336 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1339 Name
": Cannot read extended mpb on %s: %s\n",
1340 devname
, strerror(errno
));
1344 check_sum
= __gen_imsm_checksum(super
->anchor
);
1345 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1348 Name
": IMSM checksum %x != %x on %s\n",
1349 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1354 /* FIXME the BBM log is disk specific so we cannot use this global
1355 * buffer for all disks. Ok for now since we only look at the global
1356 * bbm_log_size parameter to gate assembly
1358 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1360 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1362 rc
= parse_raid_devices(super
);
1367 static void __free_imsm_disk(struct dl
*d
)
1376 static void free_imsm_disks(struct intel_super
*super
)
1380 while (super
->disks
) {
1382 super
->disks
= d
->next
;
1383 __free_imsm_disk(d
);
1385 while (super
->missing
) {
1387 super
->missing
= d
->next
;
1388 __free_imsm_disk(d
);
1393 /* free all the pieces hanging off of a super pointer */
1394 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1403 free_imsm_disks(super
);
1404 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1405 if (super
->dev_tbl
[i
]) {
1406 free(super
->dev_tbl
[i
]);
1407 super
->dev_tbl
[i
] = NULL
;
1411 static void free_imsm(struct intel_super
*super
)
1413 __free_imsm(super
, 1);
1417 static void free_super_imsm(struct supertype
*st
)
1419 struct intel_super
*super
= st
->sb
;
1428 static struct intel_super
*alloc_super(int creating_imsm
)
1430 struct intel_super
*super
= malloc(sizeof(*super
));
1433 memset(super
, 0, sizeof(*super
));
1434 super
->creating_imsm
= creating_imsm
;
1435 super
->current_vol
= -1;
1442 /* find_missing - helper routine for load_super_imsm_all that identifies
1443 * disks that have disappeared from the system. This routine relies on
1444 * the mpb being uptodate, which it is at load time.
1446 static int find_missing(struct intel_super
*super
)
1449 struct imsm_super
*mpb
= super
->anchor
;
1451 struct imsm_disk
*disk
;
1454 for (i
= 0; i
< mpb
->num_disks
; i
++) {
1455 disk
= __get_imsm_disk(mpb
, i
);
1456 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1457 if (serialcmp(dl
->disk
.serial
, disk
->serial
) == 0)
1461 /* ok we have a 'disk' without a live entry in
1464 status
= __le32_to_cpu(disk
->status
);
1465 if (status
& FAILED_DISK
|| !(status
& USABLE_DISK
))
1466 continue; /* never mind, already marked */
1468 dl
= malloc(sizeof(*dl
));
1474 dl
->devname
= strdup("missing");
1476 serialcpy(dl
->serial
, disk
->serial
);
1478 dl
->next
= super
->missing
;
1479 super
->missing
= dl
;
1485 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1486 char *devname
, int keep_fd
)
1489 struct intel_super
*super
;
1490 struct mdinfo
*sd
, *best
= NULL
;
1497 /* check if this disk is a member of an active array */
1498 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1502 if (sra
->array
.major_version
!= -1 ||
1503 sra
->array
.minor_version
!= -2 ||
1504 strcmp(sra
->text_version
, "imsm") != 0)
1507 super
= alloc_super(0);
1511 /* find the most up to date disk in this array, skipping spares */
1512 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1513 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1514 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1519 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1523 if (super
->anchor
->num_raid_devs
== 0)
1526 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1527 if (!best
|| gen
> bestgen
) {
1542 /* load the most up to date anchor */
1543 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1544 dfd
= dev_open(nm
, O_RDONLY
);
1549 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1556 /* re-parse the disk list with the current anchor */
1557 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1558 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1559 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1564 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1570 if (find_missing(super
) != 0) {
1575 if (st
->subarray
[0]) {
1576 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1577 super
->current_vol
= atoi(st
->subarray
);
1583 st
->container_dev
= fd2devnum(fd
);
1584 if (st
->ss
== NULL
) {
1585 st
->ss
= &super_imsm
;
1586 st
->minor_version
= 0;
1587 st
->max_devs
= IMSM_MAX_DEVICES
;
1589 st
->loaded_container
= 1;
1595 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1597 struct intel_super
*super
;
1601 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1604 if (st
->subarray
[0])
1605 return 1; /* FIXME */
1607 super
= alloc_super(0);
1610 Name
": malloc of %zu failed.\n",
1615 rv
= load_imsm_mpb(fd
, super
, devname
);
1620 Name
": Failed to load all information "
1621 "sections on %s\n", devname
);
1627 if (st
->ss
== NULL
) {
1628 st
->ss
= &super_imsm
;
1629 st
->minor_version
= 0;
1630 st
->max_devs
= IMSM_MAX_DEVICES
;
1632 st
->loaded_container
= 0;
1637 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1639 if (info
->level
== 1)
1641 return info
->chunk_size
>> 9;
1644 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1648 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1649 if (info
->level
== 1)
1655 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1657 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1660 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1661 unsigned long long size
, char *name
,
1662 char *homehost
, int *uuid
)
1664 /* We are creating a volume inside a pre-existing container.
1665 * so st->sb is already set.
1667 struct intel_super
*super
= st
->sb
;
1668 struct imsm_super
*mpb
= super
->anchor
;
1669 struct imsm_dev
*dev
;
1670 struct imsm_vol
*vol
;
1671 struct imsm_map
*map
;
1672 int idx
= mpb
->num_raid_devs
;
1674 unsigned long long array_blocks
;
1676 size_t size_old
, size_new
;
1678 if (mpb
->num_raid_devs
>= 2) {
1679 fprintf(stderr
, Name
": This imsm-container already has the "
1680 "maximum of 2 volumes\n");
1684 /* ensure the mpb is large enough for the new data */
1685 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1686 size_new
= disks_to_mpb_size(info
->nr_disks
);
1687 if (size_new
> size_old
) {
1689 size_t size_round
= ROUND_UP(size_new
, 512);
1691 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1692 fprintf(stderr
, Name
": could not allocate new mpb\n");
1695 memcpy(mpb_new
, mpb
, size_old
);
1698 super
->anchor
= mpb_new
;
1699 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1700 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1702 super
->current_vol
= idx
;
1703 /* when creating the first raid device in this container set num_disks
1704 * to zero, i.e. delete this spare and add raid member devices in
1705 * add_to_super_imsm_volume()
1707 if (super
->current_vol
== 0)
1709 sprintf(st
->subarray
, "%d", idx
);
1710 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1712 fprintf(stderr
, Name
": could not allocate raid device\n");
1715 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1716 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1717 info
->layout
, info
->chunk_size
,
1719 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1720 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1721 dev
->status
= __cpu_to_le32(0);
1722 dev
->reserved_blocks
= __cpu_to_le32(0);
1724 vol
->migr_state
= 0;
1727 vol
->curr_migr_unit
= 0;
1728 for (i
= 0; i
< idx
; i
++) {
1729 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1730 struct imsm_map
*pmap
= get_imsm_map(prev
, 0);
1732 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1733 offset
+= IMSM_RESERVED_SECTORS
;
1735 map
= get_imsm_map(dev
, 0);
1736 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1737 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1738 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1739 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1740 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1741 IMSM_T_STATE_NORMAL
;
1743 if (info
->level
== 1 && info
->raid_disks
> 2) {
1744 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1745 "in a raid1 volume\n");
1748 if (info
->level
== 10)
1749 map
->raid_level
= 1;
1751 map
->raid_level
= info
->level
;
1753 map
->num_members
= info
->raid_disks
;
1754 for (i
= 0; i
< map
->num_members
; i
++) {
1755 /* initialized in add_to_super */
1756 set_imsm_ord_tbl_ent(map
, i
, 0);
1758 mpb
->num_raid_devs
++;
1759 super
->dev_tbl
[super
->current_vol
] = dev
;
1764 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1765 unsigned long long size
, char *name
,
1766 char *homehost
, int *uuid
)
1768 /* This is primarily called by Create when creating a new array.
1769 * We will then get add_to_super called for each component, and then
1770 * write_init_super called to write it out to each device.
1771 * For IMSM, Create can create on fresh devices or on a pre-existing
1773 * To create on a pre-existing array a different method will be called.
1774 * This one is just for fresh drives.
1776 struct intel_super
*super
;
1777 struct imsm_super
*mpb
;
1785 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1788 super
= alloc_super(1);
1791 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1792 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1797 memset(mpb
, 0, mpb_size
);
1799 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1800 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1801 strlen(MPB_VERSION_RAID5
));
1802 mpb
->mpb_size
= mpb_size
;
1809 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1810 int fd
, char *devname
)
1812 struct intel_super
*super
= st
->sb
;
1813 struct imsm_super
*mpb
= super
->anchor
;
1815 struct imsm_dev
*dev
;
1816 struct imsm_map
*map
;
1819 dev
= get_imsm_dev(super
, super
->current_vol
);
1820 map
= get_imsm_map(dev
, 0);
1822 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1823 if (dl
->major
== dk
->major
&&
1824 dl
->minor
== dk
->minor
)
1827 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1830 /* add a pristine spare to the metadata */
1831 if (dl
->index
< 0) {
1832 dl
->index
= super
->anchor
->num_disks
;
1833 super
->anchor
->num_disks
++;
1835 set_imsm_ord_tbl_ent(map
, dk
->number
, dl
->index
);
1836 status
= CONFIGURED_DISK
| USABLE_DISK
;
1837 dl
->disk
.status
= __cpu_to_le32(status
);
1839 /* if we are creating the first raid device update the family number */
1840 if (super
->current_vol
== 0) {
1842 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
1843 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
1847 sum
= __gen_imsm_checksum(mpb
);
1848 mpb
->family_num
= __cpu_to_le32(sum
);
1852 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1853 int fd
, char *devname
)
1855 struct intel_super
*super
= st
->sb
;
1857 unsigned long long size
;
1862 if (super
->current_vol
>= 0) {
1863 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1868 dd
= malloc(sizeof(*dd
));
1871 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1874 memset(dd
, 0, sizeof(*dd
));
1875 dd
->major
= major(stb
.st_rdev
);
1876 dd
->minor
= minor(stb
.st_rdev
);
1878 dd
->devname
= devname
? strdup(devname
) : NULL
;
1880 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1883 Name
": failed to retrieve scsi serial, aborting\n");
1888 get_dev_size(fd
, NULL
, &size
);
1890 status
= USABLE_DISK
| SPARE_DISK
;
1891 serialcpy(dd
->disk
.serial
, dd
->serial
);
1892 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
1893 dd
->disk
.status
= __cpu_to_le32(status
);
1894 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1895 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
1897 dd
->disk
.scsi_id
= __cpu_to_le32(0);
1899 if (st
->update_tail
) {
1900 dd
->next
= super
->add
;
1903 dd
->next
= super
->disks
;
1908 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1910 /* spare records have their own family number and do not have any defined raid
1913 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
1915 struct imsm_super mpb_save
;
1916 struct imsm_super
*mpb
= super
->anchor
;
1921 mpb
->num_raid_devs
= 0;
1923 mpb
->mpb_size
= sizeof(struct imsm_super
);
1924 mpb
->generation_num
= __cpu_to_le32(1UL);
1926 for (d
= super
->disks
; d
; d
= d
->next
) {
1930 mpb
->disk
[0] = d
->disk
;
1931 sum
= __gen_imsm_checksum(mpb
);
1932 mpb
->family_num
= __cpu_to_le32(sum
);
1933 sum
= __gen_imsm_checksum(mpb
);
1934 mpb
->check_sum
= __cpu_to_le32(sum
);
1936 if (store_imsm_mpb(d
->fd
, super
)) {
1937 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1938 __func__
, d
->major
, d
->minor
, strerror(errno
));
1952 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1954 struct imsm_super
*mpb
= super
->anchor
;
1960 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
1962 /* 'generation' is incremented everytime the metadata is written */
1963 generation
= __le32_to_cpu(mpb
->generation_num
);
1965 mpb
->generation_num
= __cpu_to_le32(generation
);
1967 mpb_size
+= sizeof(struct imsm_disk
) * mpb
->num_disks
;
1968 for (d
= super
->disks
; d
; d
= d
->next
) {
1972 mpb
->disk
[d
->index
] = d
->disk
;
1974 for (d
= super
->missing
; d
; d
= d
->next
)
1975 mpb
->disk
[d
->index
] = d
->disk
;
1977 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1978 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1980 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1981 mpb_size
+= sizeof_imsm_dev(dev
, 0);
1983 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
1984 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
1986 /* recalculate checksum */
1987 sum
= __gen_imsm_checksum(mpb
);
1988 mpb
->check_sum
= __cpu_to_le32(sum
);
1990 /* write the mpb for disks that compose raid devices */
1991 for (d
= super
->disks
; d
; d
= d
->next
) {
1994 if (store_imsm_mpb(d
->fd
, super
))
1995 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1996 __func__
, d
->major
, d
->minor
, strerror(errno
));
2004 return write_super_imsm_spares(super
, doclose
);
2010 static int create_array(struct supertype
*st
)
2013 struct imsm_update_create_array
*u
;
2014 struct intel_super
*super
= st
->sb
;
2015 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
2017 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0);
2020 fprintf(stderr
, "%s: failed to allocate update buffer\n",
2025 u
->type
= update_create_array
;
2026 u
->dev_idx
= super
->current_vol
;
2027 imsm_copy_dev(&u
->dev
, dev
);
2028 append_metadata_update(st
, u
, len
);
2033 static int _add_disk(struct supertype
*st
)
2035 struct intel_super
*super
= st
->sb
;
2037 struct imsm_update_add_disk
*u
;
2045 fprintf(stderr
, "%s: failed to allocate update buffer\n",
2050 u
->type
= update_add_disk
;
2051 append_metadata_update(st
, u
, len
);
2056 static int write_init_super_imsm(struct supertype
*st
)
2058 if (st
->update_tail
) {
2059 /* queue the recently created array / added disk
2060 * as a metadata update */
2061 struct intel_super
*super
= st
->sb
;
2065 /* determine if we are creating a volume or adding a disk */
2066 if (super
->current_vol
< 0) {
2067 /* in the add disk case we are running in mdmon
2068 * context, so don't close fd's
2070 return _add_disk(st
);
2072 rv
= create_array(st
);
2074 for (d
= super
->disks
; d
; d
= d
->next
) {
2081 return write_super_imsm(st
->sb
, 1);
2085 static int store_zero_imsm(struct supertype
*st
, int fd
)
2087 unsigned long long dsize
;
2090 get_dev_size(fd
, NULL
, &dsize
);
2092 /* first block is stored on second to last sector of the disk */
2093 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2096 if (posix_memalign(&buf
, 512, 512) != 0)
2099 memset(buf
, 0, 512);
2100 if (write(fd
, buf
, 512) != 512)
2105 static int imsm_bbm_log_size(struct imsm_super
*mpb
)
2107 return __le32_to_cpu(mpb
->bbm_log_size
);
2111 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
2112 int layout
, int raiddisks
, int chunk
,
2113 unsigned long long size
, char *dev
,
2114 unsigned long long *freesize
,
2118 unsigned long long ldsize
;
2120 if (level
!= LEVEL_CONTAINER
)
2125 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2128 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
2129 dev
, strerror(errno
));
2132 if (!get_dev_size(fd
, dev
, &ldsize
)) {
2138 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
2143 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
2144 * FIX ME add ahci details
2146 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
2147 int layout
, int raiddisks
, int chunk
,
2148 unsigned long long size
, char *dev
,
2149 unsigned long long *freesize
,
2153 struct intel_super
*super
= st
->sb
;
2155 unsigned long long pos
= 0;
2156 unsigned long long maxsize
;
2160 if (level
== LEVEL_CONTAINER
)
2163 if (level
== 1 && raiddisks
> 2) {
2165 fprintf(stderr
, Name
": imsm does not support more "
2166 "than 2 in a raid1 configuration\n");
2170 /* We must have the container info already read in. */
2175 /* General test: make sure there is space for
2176 * 'raiddisks' device extents of size 'size' at a given
2179 unsigned long long minsize
= size
*2 /* convert to blocks */;
2180 unsigned long long start_offset
= ~0ULL;
2183 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
2184 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2189 e
= get_extents(super
, dl
);
2192 unsigned long long esize
;
2193 esize
= e
[i
].start
- pos
;
2194 if (esize
>= minsize
)
2196 if (found
&& start_offset
== ~0ULL) {
2199 } else if (found
&& pos
!= start_offset
) {
2203 pos
= e
[i
].start
+ e
[i
].size
;
2205 } while (e
[i
-1].size
);
2210 if (dcnt
< raiddisks
) {
2212 fprintf(stderr
, Name
": imsm: Not enough "
2213 "devices with space for this array "
2220 /* This device must be a member of the set */
2221 if (stat(dev
, &stb
) < 0)
2223 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
2225 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2226 if (dl
->major
== major(stb
.st_rdev
) &&
2227 dl
->minor
== minor(stb
.st_rdev
))
2232 fprintf(stderr
, Name
": %s is not in the "
2233 "same imsm set\n", dev
);
2236 e
= get_extents(super
, dl
);
2240 unsigned long long esize
;
2241 esize
= e
[i
].start
- pos
;
2242 if (esize
>= maxsize
)
2244 pos
= e
[i
].start
+ e
[i
].size
;
2246 } while (e
[i
-1].size
);
2247 *freesize
= maxsize
;
2252 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
2253 int raiddisks
, int chunk
, unsigned long long size
,
2254 char *dev
, unsigned long long *freesize
,
2260 /* if given unused devices create a container
2261 * if given given devices in a container create a member volume
2263 if (level
== LEVEL_CONTAINER
) {
2264 /* Must be a fresh device to add to a container */
2265 return validate_geometry_imsm_container(st
, level
, layout
,
2266 raiddisks
, chunk
, size
,
2272 /* creating in a given container */
2273 return validate_geometry_imsm_volume(st
, level
, layout
,
2274 raiddisks
, chunk
, size
,
2275 dev
, freesize
, verbose
);
2278 /* limit creation to the following levels */
2290 /* This device needs to be a device in an 'imsm' container */
2291 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2295 Name
": Cannot create this array on device %s\n",
2300 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
2302 fprintf(stderr
, Name
": Cannot open %s: %s\n",
2303 dev
, strerror(errno
));
2306 /* Well, it is in use by someone, maybe an 'imsm' container. */
2307 cfd
= open_container(fd
);
2311 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
2315 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
2317 if (sra
&& sra
->array
.major_version
== -1 &&
2318 strcmp(sra
->text_version
, "imsm") == 0) {
2319 /* This is a member of a imsm container. Load the container
2320 * and try to create a volume
2322 struct intel_super
*super
;
2324 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
2326 st
->container_dev
= fd2devnum(cfd
);
2328 return validate_geometry_imsm_volume(st
, level
, layout
,
2334 } else /* may belong to another container */
2339 #endif /* MDASSEMBLE */
2341 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
2343 /* Given a container loaded by load_super_imsm_all,
2344 * extract information about all the arrays into
2347 * For each imsm_dev create an mdinfo, fill it in,
2348 * then look for matching devices in super->disks
2349 * and create appropriate device mdinfo.
2351 struct intel_super
*super
= st
->sb
;
2352 struct imsm_super
*mpb
= super
->anchor
;
2353 struct mdinfo
*rest
= NULL
;
2356 /* do not assemble arrays that might have bad blocks */
2357 if (imsm_bbm_log_size(super
->anchor
)) {
2358 fprintf(stderr
, Name
": BBM log found in metadata. "
2359 "Cannot activate array(s).\n");
2363 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2364 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
2365 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2366 struct mdinfo
*this;
2369 this = malloc(sizeof(*this));
2370 memset(this, 0, sizeof(*this));
2373 super
->current_vol
= i
;
2374 getinfo_super_imsm_volume(st
, this);
2375 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
2376 struct mdinfo
*info_d
;
2384 idx
= get_imsm_disk_idx(dev
, slot
);
2385 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
2386 for (d
= super
->disks
; d
; d
= d
->next
)
2387 if (d
->index
== idx
)
2393 s
= d
? __le32_to_cpu(d
->disk
.status
) : 0;
2394 if (s
& FAILED_DISK
)
2396 if (!(s
& USABLE_DISK
))
2398 if (ord
& IMSM_ORD_REBUILD
)
2402 * if we skip some disks the array will be assmebled degraded;
2403 * reset resync start to avoid a dirty-degraded situation
2405 * FIXME handle dirty degraded
2407 if (skip
&& !dev
->vol
.dirty
)
2408 this->resync_start
= ~0ULL;
2412 info_d
= malloc(sizeof(*info_d
));
2414 fprintf(stderr
, Name
": failed to allocate disk"
2415 " for volume %s\n", (char *) dev
->volume
);
2420 memset(info_d
, 0, sizeof(*info_d
));
2421 info_d
->next
= this->devs
;
2422 this->devs
= info_d
;
2424 info_d
->disk
.number
= d
->index
;
2425 info_d
->disk
.major
= d
->major
;
2426 info_d
->disk
.minor
= d
->minor
;
2427 info_d
->disk
.raid_disk
= slot
;
2429 this->array
.working_disks
++;
2431 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
2432 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2433 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2435 strcpy(info_d
->name
, d
->devname
);
2445 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
2448 struct intel_super
*super
= c
->sb
;
2449 struct imsm_super
*mpb
= super
->anchor
;
2451 if (atoi(inst
) >= mpb
->num_raid_devs
) {
2452 fprintf(stderr
, "%s: subarry index %d, out of range\n",
2453 __func__
, atoi(inst
));
2457 dprintf("imsm: open_new %s\n", inst
);
2458 a
->info
.container_member
= atoi(inst
);
2462 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
, int failed
)
2464 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2467 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
2468 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
2470 switch (get_imsm_raid_level(map
)) {
2472 return IMSM_T_STATE_FAILED
;
2475 if (failed
< map
->num_members
)
2476 return IMSM_T_STATE_DEGRADED
;
2478 return IMSM_T_STATE_FAILED
;
2483 * check to see if any mirrors have failed, otherwise we
2484 * are degraded. Even numbered slots are mirrored on
2488 /* gcc -Os complains that this is unused */
2489 int insync
= insync
;
2491 for (i
= 0; i
< map
->num_members
; i
++) {
2492 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
2493 int idx
= ord_to_idx(ord
);
2494 struct imsm_disk
*disk
;
2496 /* reset the potential in-sync count on even-numbered
2497 * slots. num_copies is always 2 for imsm raid10
2502 disk
= get_imsm_disk(super
, idx
);
2504 __le32_to_cpu(disk
->status
) & FAILED_DISK
||
2505 ord
& IMSM_ORD_REBUILD
)
2508 /* no in-sync disks left in this mirror the
2512 return IMSM_T_STATE_FAILED
;
2515 return IMSM_T_STATE_DEGRADED
;
2519 return IMSM_T_STATE_DEGRADED
;
2521 return IMSM_T_STATE_FAILED
;
2527 return map
->map_state
;
2530 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
)
2534 struct imsm_disk
*disk
;
2535 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2537 for (i
= 0; i
< map
->num_members
; i
++) {
2538 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
2539 int idx
= ord_to_idx(ord
);
2541 disk
= get_imsm_disk(super
, idx
);
2543 __le32_to_cpu(disk
->status
) & FAILED_DISK
||
2544 ord
& IMSM_ORD_REBUILD
)
2551 static int is_resyncing(struct imsm_dev
*dev
)
2553 struct imsm_map
*migr_map
;
2555 if (!dev
->vol
.migr_state
)
2558 if (dev
->vol
.migr_type
== 0)
2561 migr_map
= get_imsm_map(dev
, 1);
2563 if (migr_map
->map_state
== IMSM_T_STATE_NORMAL
)
2569 static int is_rebuilding(struct imsm_dev
*dev
)
2571 struct imsm_map
*migr_map
;
2573 if (!dev
->vol
.migr_state
)
2576 if (dev
->vol
.migr_type
== 0)
2579 migr_map
= get_imsm_map(dev
, 1);
2581 if (migr_map
->map_state
== IMSM_T_STATE_DEGRADED
)
2587 static void mark_failure(struct imsm_disk
*disk
)
2589 __u32 status
= __le32_to_cpu(disk
->status
);
2591 if (status
& FAILED_DISK
)
2593 status
|= FAILED_DISK
;
2594 disk
->status
= __cpu_to_le32(status
);
2595 disk
->scsi_id
= __cpu_to_le32(~(__u32
)0);
2596 memmove(&disk
->serial
[0], &disk
->serial
[1], MAX_RAID_SERIAL_LEN
- 1);
2599 /* Handle dirty -> clean transititions and resync. Degraded and rebuild
2600 * states are handled in imsm_set_disk() with one exception, when a
2601 * resync is stopped due to a new failure this routine will set the
2602 * 'degraded' state for the array.
2604 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
2606 int inst
= a
->info
.container_member
;
2607 struct intel_super
*super
= a
->container
->sb
;
2608 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2609 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2610 int failed
= imsm_count_failed(super
, dev
);
2611 __u8 map_state
= imsm_check_degraded(super
, dev
, failed
);
2613 /* before we activate this array handle any missing disks */
2614 if (consistent
== 2 && super
->missing
) {
2617 dprintf("imsm: mark missing\n");
2618 end_migration(dev
, map_state
);
2619 for (dl
= super
->missing
; dl
; dl
= dl
->next
)
2620 mark_failure(&dl
->disk
);
2621 super
->updates_pending
++;
2624 if (consistent
== 2 &&
2625 (!is_resync_complete(a
) ||
2626 map_state
!= IMSM_T_STATE_NORMAL
||
2627 dev
->vol
.migr_state
))
2630 if (is_resync_complete(a
)) {
2631 /* complete intialization / resync,
2632 * recovery is completed in ->set_disk
2634 if (is_resyncing(dev
)) {
2635 dprintf("imsm: mark resync done\n");
2636 end_migration(dev
, map_state
);
2637 super
->updates_pending
++;
2639 } else if (!is_resyncing(dev
) && !failed
) {
2640 /* mark the start of the init process if nothing is failed */
2641 dprintf("imsm: mark resync start (%llu)\n", a
->resync_start
);
2642 map
->map_state
= map_state
;
2643 migrate(dev
, IMSM_T_STATE_NORMAL
,
2644 map
->map_state
== IMSM_T_STATE_NORMAL
);
2645 super
->updates_pending
++;
2648 /* check if we can update the migration checkpoint */
2649 if (dev
->vol
.migr_state
&&
2650 __le32_to_cpu(dev
->vol
.curr_migr_unit
) != a
->resync_start
) {
2651 dprintf("imsm: checkpoint migration (%llu)\n", a
->resync_start
);
2652 dev
->vol
.curr_migr_unit
= __cpu_to_le32(a
->resync_start
);
2653 super
->updates_pending
++;
2656 /* mark dirty / clean */
2657 if (dev
->vol
.dirty
!= !consistent
) {
2658 dprintf("imsm: mark '%s' (%llu)\n",
2659 consistent
? "clean" : "dirty", a
->resync_start
);
2664 super
->updates_pending
++;
2669 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2671 int inst
= a
->info
.container_member
;
2672 struct intel_super
*super
= a
->container
->sb
;
2673 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2674 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2675 struct imsm_disk
*disk
;
2681 if (n
> map
->num_members
)
2682 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2683 n
, map
->num_members
- 1);
2688 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2690 ord
= get_imsm_ord_tbl_ent(dev
, n
);
2691 disk
= get_imsm_disk(super
, ord_to_idx(ord
));
2693 /* check for new failures */
2694 status
= __le32_to_cpu(disk
->status
);
2695 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2697 super
->updates_pending
++;
2700 /* check if in_sync */
2701 if (state
& DS_INSYNC
&& ord
& IMSM_ORD_REBUILD
) {
2702 struct imsm_map
*migr_map
= get_imsm_map(dev
, 1);
2704 set_imsm_ord_tbl_ent(migr_map
, n
, ord_to_idx(ord
));
2705 super
->updates_pending
++;
2708 failed
= imsm_count_failed(super
, dev
);
2709 map_state
= imsm_check_degraded(super
, dev
, failed
);
2711 /* check if recovery complete, newly degraded, or failed */
2712 if (map_state
== IMSM_T_STATE_NORMAL
&& is_rebuilding(dev
)) {
2713 end_migration(dev
, map_state
);
2714 super
->updates_pending
++;
2715 } else if (map_state
== IMSM_T_STATE_DEGRADED
&&
2716 map
->map_state
!= map_state
&&
2717 !dev
->vol
.migr_state
) {
2718 dprintf("imsm: mark degraded\n");
2719 map
->map_state
= map_state
;
2720 super
->updates_pending
++;
2721 } else if (map_state
== IMSM_T_STATE_FAILED
&&
2722 map
->map_state
!= map_state
) {
2723 dprintf("imsm: mark failed\n");
2724 end_migration(dev
, map_state
);
2725 super
->updates_pending
++;
2729 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2731 struct imsm_super
*mpb
= super
->anchor
;
2732 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2733 unsigned long long dsize
;
2734 unsigned long long sectors
;
2736 get_dev_size(fd
, NULL
, &dsize
);
2738 if (mpb_size
> 512) {
2739 /* -1 to account for anchor */
2740 sectors
= mpb_sectors(mpb
) - 1;
2742 /* write the extended mpb to the sectors preceeding the anchor */
2743 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2746 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2750 /* first block is stored on second to last sector of the disk */
2751 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2754 if (write(fd
, super
->buf
, 512) != 512)
2760 static void imsm_sync_metadata(struct supertype
*container
)
2762 struct intel_super
*super
= container
->sb
;
2764 if (!super
->updates_pending
)
2767 write_super_imsm(super
, 0);
2769 super
->updates_pending
= 0;
2772 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
2774 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2775 int i
= get_imsm_disk_idx(dev
, idx
);
2778 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2782 if (dl
&& __le32_to_cpu(dl
->disk
.status
) & FAILED_DISK
)
2786 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
2791 static struct dl
*imsm_add_spare(struct intel_super
*super
, int slot
, struct active_array
*a
)
2793 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2794 int idx
= get_imsm_disk_idx(dev
, slot
);
2795 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2796 unsigned long long esize
;
2797 unsigned long long pos
;
2806 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2807 /* If in this array, skip */
2808 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2809 if (d
->state_fd
>= 0 &&
2810 d
->disk
.major
== dl
->major
&&
2811 d
->disk
.minor
== dl
->minor
) {
2812 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2818 /* skip in use or failed drives */
2819 status
= __le32_to_cpu(dl
->disk
.status
);
2820 if (status
& FAILED_DISK
|| idx
== dl
->index
) {
2821 dprintf("%x:%x status ( %s%s)\n",
2822 dl
->major
, dl
->minor
,
2823 status
& FAILED_DISK
? "failed " : "",
2824 idx
== dl
->index
? "in use " : "");
2828 /* Does this unused device have the requisite free space?
2829 * We need a->info.component_size sectors
2831 ex
= get_extents(super
, dl
);
2833 dprintf("cannot get extents\n");
2839 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2842 /* check that we can start at pba_of_lba0 with
2843 * a->info.component_size of space
2845 esize
= ex
[j
].start
- pos
;
2846 if (array_start
>= pos
&&
2847 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2851 pos
= ex
[j
].start
+ ex
[j
].size
;
2854 } while (ex
[j
-1].size
);
2858 dprintf("%x:%x does not have %llu at %d\n",
2859 dl
->major
, dl
->minor
,
2860 a
->info
.component_size
,
2861 __le32_to_cpu(map
->pba_of_lba0
));
2871 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2872 struct metadata_update
**updates
)
2875 * Find a device with unused free space and use it to replace a
2876 * failed/vacant region in an array. We replace failed regions one a
2877 * array at a time. The result is that a new spare disk will be added
2878 * to the first failed array and after the monitor has finished
2879 * propagating failures the remainder will be consumed.
2881 * FIXME add a capability for mdmon to request spares from another
2885 struct intel_super
*super
= a
->container
->sb
;
2886 int inst
= a
->info
.container_member
;
2887 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2888 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2889 int failed
= a
->info
.array
.raid_disks
;
2890 struct mdinfo
*rv
= NULL
;
2893 struct metadata_update
*mu
;
2895 struct imsm_update_activate_spare
*u
;
2899 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2900 if ((d
->curr_state
& DS_FAULTY
) &&
2902 /* wait for Removal to happen */
2904 if (d
->state_fd
>= 0)
2908 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2909 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2910 if (imsm_check_degraded(super
, dev
, failed
) != IMSM_T_STATE_DEGRADED
)
2913 /* For each slot, if it is not working, find a spare */
2914 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2915 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2916 if (d
->disk
.raid_disk
== i
)
2918 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2919 if (d
&& (d
->state_fd
>= 0))
2923 * OK, this device needs recovery. Try to re-add the previous
2924 * occupant of this slot, if this fails add a new spare
2926 dl
= imsm_readd(super
, i
, a
);
2928 dl
= imsm_add_spare(super
, i
, a
);
2932 /* found a usable disk with enough space */
2933 di
= malloc(sizeof(*di
));
2936 memset(di
, 0, sizeof(*di
));
2938 /* dl->index will be -1 in the case we are activating a
2939 * pristine spare. imsm_process_update() will create a
2940 * new index in this case. Once a disk is found to be
2941 * failed in all member arrays it is kicked from the
2944 di
->disk
.number
= dl
->index
;
2946 /* (ab)use di->devs to store a pointer to the device
2949 di
->devs
= (struct mdinfo
*) dl
;
2951 di
->disk
.raid_disk
= i
;
2952 di
->disk
.major
= dl
->major
;
2953 di
->disk
.minor
= dl
->minor
;
2955 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2956 di
->component_size
= a
->info
.component_size
;
2957 di
->container_member
= inst
;
2961 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2962 i
, di
->data_offset
);
2968 /* No spares found */
2970 /* Now 'rv' has a list of devices to return.
2971 * Create a metadata_update record to update the
2972 * disk_ord_tbl for the array
2974 mu
= malloc(sizeof(*mu
));
2976 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2977 if (mu
->buf
== NULL
) {
2984 struct mdinfo
*n
= rv
->next
;
2993 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2994 mu
->next
= *updates
;
2995 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2997 for (di
= rv
; di
; di
= di
->next
) {
2998 u
->type
= update_activate_spare
;
2999 u
->dl
= (struct dl
*) di
->devs
;
3001 u
->slot
= di
->disk
.raid_disk
;
3012 static int disks_overlap(struct imsm_dev
*d1
, struct imsm_dev
*d2
)
3014 struct imsm_map
*m1
= get_imsm_map(d1
, 0);
3015 struct imsm_map
*m2
= get_imsm_map(d2
, 0);
3020 for (i
= 0; i
< m1
->num_members
; i
++) {
3021 idx
= get_imsm_disk_idx(d1
, i
);
3022 for (j
= 0; j
< m2
->num_members
; j
++)
3023 if (idx
== get_imsm_disk_idx(d2
, j
))
3030 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
);
3032 static void imsm_process_update(struct supertype
*st
,
3033 struct metadata_update
*update
)
3036 * crack open the metadata_update envelope to find the update record
3037 * update can be one of:
3038 * update_activate_spare - a spare device has replaced a failed
3039 * device in an array, update the disk_ord_tbl. If this disk is
3040 * present in all member arrays then also clear the SPARE_DISK
3043 struct intel_super
*super
= st
->sb
;
3044 struct imsm_super
*mpb
;
3045 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
3047 /* update requires a larger buf but the allocation failed */
3048 if (super
->next_len
&& !super
->next_buf
) {
3049 super
->next_len
= 0;
3053 if (super
->next_buf
) {
3054 memcpy(super
->next_buf
, super
->buf
, super
->len
);
3056 super
->len
= super
->next_len
;
3057 super
->buf
= super
->next_buf
;
3059 super
->next_len
= 0;
3060 super
->next_buf
= NULL
;
3063 mpb
= super
->anchor
;
3066 case update_activate_spare
: {
3067 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
3068 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
3069 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3070 struct imsm_map
*migr_map
;
3071 struct active_array
*a
;
3072 struct imsm_disk
*disk
;
3078 int victim
= get_imsm_disk_idx(dev
, u
->slot
);
3081 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3086 fprintf(stderr
, "error: imsm_activate_spare passed "
3087 "an unknown disk (index: %d)\n",
3092 super
->updates_pending
++;
3094 /* count failures (excluding rebuilds and the victim)
3095 * to determine map[0] state
3098 for (i
= 0; i
< map
->num_members
; i
++) {
3101 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
3103 __le32_to_cpu(disk
->status
) & FAILED_DISK
)
3107 /* adding a pristine spare, assign a new index */
3108 if (dl
->index
< 0) {
3109 dl
->index
= super
->anchor
->num_disks
;
3110 super
->anchor
->num_disks
++;
3113 status
= __le32_to_cpu(disk
->status
);
3114 status
|= CONFIGURED_DISK
;
3115 status
&= ~SPARE_DISK
;
3116 disk
->status
= __cpu_to_le32(status
);
3119 to_state
= imsm_check_degraded(super
, dev
, failed
);
3120 map
->map_state
= IMSM_T_STATE_DEGRADED
;
3121 migrate(dev
, to_state
, 1);
3122 migr_map
= get_imsm_map(dev
, 1);
3123 set_imsm_ord_tbl_ent(map
, u
->slot
, dl
->index
);
3124 set_imsm_ord_tbl_ent(migr_map
, u
->slot
, dl
->index
| IMSM_ORD_REBUILD
);
3126 /* count arrays using the victim in the metadata */
3128 for (a
= st
->arrays
; a
; a
= a
->next
) {
3129 dev
= get_imsm_dev(super
, a
->info
.container_member
);
3130 for (i
= 0; i
< map
->num_members
; i
++)
3131 if (victim
== get_imsm_disk_idx(dev
, i
))
3135 /* delete the victim if it is no longer being
3141 /* We know that 'manager' isn't touching anything,
3142 * so it is safe to delete
3144 for (dlp
= &super
->disks
; *dlp
; dlp
= &(*dlp
)->next
)
3145 if ((*dlp
)->index
== victim
)
3148 /* victim may be on the missing list */
3150 for (dlp
= &super
->missing
; *dlp
; dlp
= &(*dlp
)->next
)
3151 if ((*dlp
)->index
== victim
)
3153 imsm_delete(super
, dlp
, victim
);
3157 case update_create_array
: {
3158 /* someone wants to create a new array, we need to be aware of
3159 * a few races/collisions:
3160 * 1/ 'Create' called by two separate instances of mdadm
3161 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
3162 * devices that have since been assimilated via
3164 * In the event this update can not be carried out mdadm will
3165 * (FIX ME) notice that its update did not take hold.
3167 struct imsm_update_create_array
*u
= (void *) update
->buf
;
3168 struct imsm_dev
*dev
;
3169 struct imsm_map
*map
, *new_map
;
3170 unsigned long long start
, end
;
3171 unsigned long long new_start
, new_end
;
3175 /* handle racing creates: first come first serve */
3176 if (u
->dev_idx
< mpb
->num_raid_devs
) {
3177 dprintf("%s: subarray %d already defined\n",
3178 __func__
, u
->dev_idx
);
3182 /* check update is next in sequence */
3183 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
3184 dprintf("%s: can not create array %d expected index %d\n",
3185 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
3189 new_map
= get_imsm_map(&u
->dev
, 0);
3190 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
3191 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
3193 /* handle activate_spare versus create race:
3194 * check to make sure that overlapping arrays do not include
3197 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3198 dev
= get_imsm_dev(super
, i
);
3199 map
= get_imsm_map(dev
, 0);
3200 start
= __le32_to_cpu(map
->pba_of_lba0
);
3201 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
3202 if ((new_start
>= start
&& new_start
<= end
) ||
3203 (start
>= new_start
&& start
<= new_end
))
3205 if (overlap
&& disks_overlap(dev
, &u
->dev
)) {
3206 dprintf("%s: arrays overlap\n", __func__
);
3210 /* check num_members sanity */
3211 if (new_map
->num_members
> mpb
->num_disks
) {
3212 dprintf("%s: num_disks out of range\n", __func__
);
3216 /* check that prepare update was successful */
3217 if (!update
->space
) {
3218 dprintf("%s: prepare update failed\n", __func__
);
3222 super
->updates_pending
++;
3223 dev
= update
->space
;
3224 map
= get_imsm_map(dev
, 0);
3225 update
->space
= NULL
;
3226 imsm_copy_dev(dev
, &u
->dev
);
3227 map
= get_imsm_map(dev
, 0);
3228 super
->dev_tbl
[u
->dev_idx
] = dev
;
3229 mpb
->num_raid_devs
++;
3232 for (i
= 0; i
< map
->num_members
; i
++) {
3233 struct imsm_disk
*disk
;
3236 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
3237 status
= __le32_to_cpu(disk
->status
);
3238 status
|= CONFIGURED_DISK
;
3239 status
&= ~SPARE_DISK
;
3240 disk
->status
= __cpu_to_le32(status
);
3244 case update_add_disk
:
3246 /* we may be able to repair some arrays if disks are
3249 struct active_array
*a
;
3251 super
->updates_pending
++;
3252 for (a
= st
->arrays
; a
; a
= a
->next
)
3253 a
->check_degraded
= 1;
3255 /* add some spares to the metadata */
3256 while (super
->add
) {
3260 super
->add
= al
->next
;
3261 al
->next
= super
->disks
;
3263 dprintf("%s: added %x:%x\n",
3264 __func__
, al
->major
, al
->minor
);
3271 static void imsm_prepare_update(struct supertype
*st
,
3272 struct metadata_update
*update
)
3275 * Allocate space to hold new disk entries, raid-device entries or a new
3276 * mpb if necessary. The manager synchronously waits for updates to
3277 * complete in the monitor, so new mpb buffers allocated here can be
3278 * integrated by the monitor thread without worrying about live pointers
3279 * in the manager thread.
3281 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
3282 struct intel_super
*super
= st
->sb
;
3283 struct imsm_super
*mpb
= super
->anchor
;
3288 case update_create_array
: {
3289 struct imsm_update_create_array
*u
= (void *) update
->buf
;
3291 len
= sizeof_imsm_dev(&u
->dev
, 1);
3292 update
->space
= malloc(len
);
3299 /* check if we need a larger metadata buffer */
3300 if (super
->next_buf
)
3301 buf_len
= super
->next_len
;
3303 buf_len
= super
->len
;
3305 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
3306 /* ok we need a larger buf than what is currently allocated
3307 * if this allocation fails process_update will notice that
3308 * ->next_len is set and ->next_buf is NULL
3310 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
3311 if (super
->next_buf
)
3312 free(super
->next_buf
);
3314 super
->next_len
= buf_len
;
3315 if (posix_memalign(&super
->next_buf
, buf_len
, 512) != 0)
3316 super
->next_buf
= NULL
;
3320 /* must be called while manager is quiesced */
3321 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
)
3323 struct imsm_super
*mpb
= super
->anchor
;
3325 struct imsm_dev
*dev
;
3326 struct imsm_map
*map
;
3327 int i
, j
, num_members
;
3330 dprintf("%s: deleting device[%d] from imsm_super\n",
3333 /* shift all indexes down one */
3334 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
3335 if (iter
->index
> index
)
3337 for (iter
= super
->missing
; iter
; iter
= iter
->next
)
3338 if (iter
->index
> index
)
3341 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3342 dev
= get_imsm_dev(super
, i
);
3343 map
= get_imsm_map(dev
, 0);
3344 num_members
= map
->num_members
;
3345 for (j
= 0; j
< num_members
; j
++) {
3346 /* update ord entries being careful not to propagate
3347 * ord-flags to the first map
3349 ord
= get_imsm_ord_tbl_ent(dev
, j
);
3351 if (ord_to_idx(ord
) <= index
)
3354 map
= get_imsm_map(dev
, 0);
3355 set_imsm_ord_tbl_ent(map
, j
, ord_to_idx(ord
- 1));
3356 map
= get_imsm_map(dev
, 1);
3358 set_imsm_ord_tbl_ent(map
, j
, ord
- 1);
3363 super
->updates_pending
++;
3365 struct dl
*dl
= *dlp
;
3367 *dlp
= (*dlp
)->next
;
3368 __free_imsm_disk(dl
);
3371 #endif /* MDASSEMBLE */
3373 struct superswitch super_imsm
= {
3375 .examine_super
= examine_super_imsm
,
3376 .brief_examine_super
= brief_examine_super_imsm
,
3377 .detail_super
= detail_super_imsm
,
3378 .brief_detail_super
= brief_detail_super_imsm
,
3379 .write_init_super
= write_init_super_imsm
,
3380 .validate_geometry
= validate_geometry_imsm
,
3381 .add_to_super
= add_to_super_imsm
,
3383 .match_home
= match_home_imsm
,
3384 .uuid_from_super
= uuid_from_super_imsm
,
3385 .getinfo_super
= getinfo_super_imsm
,
3386 .update_super
= update_super_imsm
,
3388 .avail_size
= avail_size_imsm
,
3390 .compare_super
= compare_super_imsm
,
3392 .load_super
= load_super_imsm
,
3393 .init_super
= init_super_imsm
,
3394 .store_super
= store_zero_imsm
,
3395 .free_super
= free_super_imsm
,
3396 .match_metadata_desc
= match_metadata_desc_imsm
,
3397 .container_content
= container_content_imsm
,
3403 .open_new
= imsm_open_new
,
3404 .load_super
= load_super_imsm
,
3405 .set_array_state
= imsm_set_array_state
,
3406 .set_disk
= imsm_set_disk
,
3407 .sync_metadata
= imsm_sync_metadata
,
3408 .activate_spare
= imsm_activate_spare
,
3409 .process_update
= imsm_process_update
,
3410 .prepare_update
= imsm_prepare_update
,
3411 #endif /* MDASSEMBLE */