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
65 #define IMSM_T_STATE_FAILED 3
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 */
84 #define MIGR_REBUILD 1
85 #define MIGR_VERIFY 2 /* analagous to echo check > sync_action */
86 #define MIGR_GEN_MIGR 3
87 #define MIGR_STATE_CHANGE 4
88 __u8 migr_type
; /* Initializing, Rebuilding, ... */
92 struct imsm_map map
[1];
93 /* here comes another one if migr_state */
94 } __attribute__ ((packed
));
97 __u8 volume
[MAX_RAID_SERIAL_LEN
];
100 __u32 status
; /* Persistent RaidDev status */
101 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
102 #define IMSM_DEV_FILLERS 12
103 __u32 filler
[IMSM_DEV_FILLERS
];
105 } __attribute__ ((packed
));
108 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
109 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
110 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
111 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
112 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
113 __u32 error_log_size
; /* 0x30 - 0x33 in bytes */
114 __u32 attributes
; /* 0x34 - 0x37 */
115 __u8 num_disks
; /* 0x38 Number of configured disks */
116 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
117 __u8 error_log_pos
; /* 0x3A */
118 __u8 fill
[1]; /* 0x3B */
119 __u32 cache_size
; /* 0x3c - 0x40 in mb */
120 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
121 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
122 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
123 #define IMSM_FILLERS 35
124 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
125 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
126 /* here comes imsm_dev[num_raid_devs] */
127 /* here comes BBM logs */
128 } __attribute__ ((packed
));
130 #define BBM_LOG_MAX_ENTRIES 254
132 struct bbm_log_entry
{
133 __u64 defective_block_start
;
134 #define UNREADABLE 0xFFFFFFFF
135 __u32 spare_block_offset
;
136 __u16 remapped_marked_count
;
138 } __attribute__ ((__packed__
));
141 __u32 signature
; /* 0xABADB10C */
143 __u32 reserved_spare_block_count
; /* 0 */
144 __u32 reserved
; /* 0xFFFF */
145 __u64 first_spare_lba
;
146 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
147 } __attribute__ ((__packed__
));
151 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
154 static unsigned int sector_count(__u32 bytes
)
156 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
159 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
161 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
164 /* internal representation of IMSM metadata */
167 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
168 struct imsm_super
*anchor
; /* immovable parameters */
170 size_t len
; /* size of the 'buf' allocation */
171 void *next_buf
; /* for realloc'ing buf from the manager */
173 int updates_pending
; /* count of pending updates for mdmon */
174 int creating_imsm
; /* flag to indicate container creation */
175 int current_vol
; /* index of raid device undergoing creation */
176 #define IMSM_MAX_RAID_DEVS 2
177 struct imsm_dev
*dev_tbl
[IMSM_MAX_RAID_DEVS
];
181 __u8 serial
[MAX_RAID_SERIAL_LEN
];
184 struct imsm_disk disk
;
187 struct dl
*add
; /* list of disks to add while mdmon active */
188 struct dl
*missing
; /* disks removed while we weren't looking */
189 struct bbm_log
*bbm_log
;
193 unsigned long long start
, size
;
196 /* definition of messages passed to imsm_process_update */
197 enum imsm_update_type
{
198 update_activate_spare
,
203 struct imsm_update_activate_spare
{
204 enum imsm_update_type type
;
208 struct imsm_update_activate_spare
*next
;
211 struct imsm_update_create_array
{
212 enum imsm_update_type type
;
217 struct imsm_update_add_disk
{
218 enum imsm_update_type type
;
221 static struct supertype
*match_metadata_desc_imsm(char *arg
)
223 struct supertype
*st
;
225 if (strcmp(arg
, "imsm") != 0 &&
226 strcmp(arg
, "default") != 0
230 st
= malloc(sizeof(*st
));
231 memset(st
, 0, sizeof(*st
));
232 st
->ss
= &super_imsm
;
233 st
->max_devs
= IMSM_MAX_DEVICES
;
234 st
->minor_version
= 0;
240 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
242 return &mpb
->sig
[MPB_SIG_LEN
];
246 /* retrieve a disk directly from the anchor when the anchor is known to be
247 * up-to-date, currently only at load time
249 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
251 if (index
>= mpb
->num_disks
)
253 return &mpb
->disk
[index
];
257 /* retrieve a disk from the parsed metadata */
258 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
262 for (d
= super
->disks
; d
; d
= d
->next
)
263 if (d
->index
== index
)
270 /* generate a checksum directly from the anchor when the anchor is known to be
271 * up-to-date, currently only at load or write_super after coalescing
273 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
275 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
276 __u32
*p
= (__u32
*) mpb
;
280 sum
+= __le32_to_cpu(*p
);
284 return sum
- __le32_to_cpu(mpb
->check_sum
);
287 static size_t sizeof_imsm_map(struct imsm_map
*map
)
289 return sizeof(struct imsm_map
) + sizeof(__u32
) * (map
->num_members
- 1);
292 struct imsm_map
*get_imsm_map(struct imsm_dev
*dev
, int second_map
)
294 struct imsm_map
*map
= &dev
->vol
.map
[0];
296 if (second_map
&& !dev
->vol
.migr_state
)
298 else if (second_map
) {
301 return ptr
+ sizeof_imsm_map(map
);
307 /* return the size of the device.
308 * migr_state increases the returned size if map[0] were to be duplicated
310 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
, int migr_state
)
312 size_t size
= sizeof(*dev
) - sizeof(struct imsm_map
) +
313 sizeof_imsm_map(get_imsm_map(dev
, 0));
315 /* migrating means an additional map */
316 if (dev
->vol
.migr_state
)
317 size
+= sizeof_imsm_map(get_imsm_map(dev
, 1));
319 size
+= sizeof_imsm_map(get_imsm_map(dev
, 0));
324 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
330 if (index
>= mpb
->num_raid_devs
)
333 /* devices start after all disks */
334 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
336 for (i
= 0; i
<= index
; i
++)
338 return _mpb
+ offset
;
340 offset
+= sizeof_imsm_dev(_mpb
+ offset
, 0);
345 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
347 if (index
>= super
->anchor
->num_raid_devs
)
349 return super
->dev_tbl
[index
];
352 static __u32
get_imsm_ord_tbl_ent(struct imsm_dev
*dev
, int slot
)
354 struct imsm_map
*map
;
356 if (dev
->vol
.migr_state
)
357 map
= get_imsm_map(dev
, 1);
359 map
= get_imsm_map(dev
, 0);
361 /* top byte identifies disk under rebuild */
362 return __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
365 #define ord_to_idx(ord) (((ord) << 8) >> 8)
366 static __u32
get_imsm_disk_idx(struct imsm_dev
*dev
, int slot
)
368 __u32 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
370 return ord_to_idx(ord
);
373 static void set_imsm_ord_tbl_ent(struct imsm_map
*map
, int slot
, __u32 ord
)
375 map
->disk_ord_tbl
[slot
] = __cpu_to_le32(ord
);
378 static int get_imsm_raid_level(struct imsm_map
*map
)
380 if (map
->raid_level
== 1) {
381 if (map
->num_members
== 2)
387 return map
->raid_level
;
390 static int cmp_extent(const void *av
, const void *bv
)
392 const struct extent
*a
= av
;
393 const struct extent
*b
= bv
;
394 if (a
->start
< b
->start
)
396 if (a
->start
> b
->start
)
401 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
403 /* find a list of used extents on the given physical device */
404 struct extent
*rv
, *e
;
407 __u32 reservation
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
409 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
410 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
411 struct imsm_map
*map
= get_imsm_map(dev
, 0);
413 for (j
= 0; j
< map
->num_members
; j
++) {
414 __u32 index
= get_imsm_disk_idx(dev
, j
);
416 if (index
== dl
->index
)
420 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
425 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
426 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
427 struct imsm_map
*map
= get_imsm_map(dev
, 0);
429 for (j
= 0; j
< map
->num_members
; j
++) {
430 __u32 index
= get_imsm_disk_idx(dev
, j
);
432 if (index
== dl
->index
) {
433 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
434 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
439 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
441 /* determine the start of the metadata
442 * when no raid devices are defined use the default
443 * ...otherwise allow the metadata to truncate the value
444 * as is the case with older versions of imsm
447 struct extent
*last
= &rv
[memberships
- 1];
450 remainder
= __le32_to_cpu(dl
->disk
.total_blocks
) -
451 (last
->start
+ last
->size
);
452 if (reservation
> remainder
)
453 reservation
= remainder
;
455 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) - reservation
;
460 /* try to determine how much space is reserved for metadata from
461 * the last get_extents() entry, otherwise fallback to the
464 static __u32
imsm_reserved_sectors(struct intel_super
*super
, struct dl
*dl
)
470 /* for spares just return a minimal reservation which will grow
471 * once the spare is picked up by an array
474 return MPB_SECTOR_CNT
;
476 e
= get_extents(super
, dl
);
478 return MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
480 /* scroll to last entry */
481 for (i
= 0; e
[i
].size
; i
++)
484 rv
= __le32_to_cpu(dl
->disk
.total_blocks
) - e
[i
].start
;
492 static void print_imsm_dev(struct imsm_dev
*dev
, char *uuid
, int disk_idx
)
496 struct imsm_map
*map
= get_imsm_map(dev
, 0);
500 printf("[%.16s]:\n", dev
->volume
);
501 printf(" UUID : %s\n", uuid
);
502 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
503 printf(" Members : %d\n", map
->num_members
);
504 for (slot
= 0; slot
< map
->num_members
; slot
++)
505 if (disk_idx
== get_imsm_disk_idx(dev
, slot
))
507 if (slot
< map
->num_members
) {
508 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
509 printf(" This Slot : %d%s\n", slot
,
510 ord
& IMSM_ORD_REBUILD
? " (out-of-sync)" : "");
512 printf(" This Slot : ?\n");
513 sz
= __le32_to_cpu(dev
->size_high
);
515 sz
+= __le32_to_cpu(dev
->size_low
);
516 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
517 human_size(sz
* 512));
518 sz
= __le32_to_cpu(map
->blocks_per_member
);
519 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
520 human_size(sz
* 512));
521 printf(" Sector Offset : %u\n",
522 __le32_to_cpu(map
->pba_of_lba0
));
523 printf(" Num Stripes : %u\n",
524 __le32_to_cpu(map
->num_data_stripes
));
525 printf(" Chunk Size : %u KiB\n",
526 __le16_to_cpu(map
->blocks_per_strip
) / 2);
527 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
528 printf(" Migrate State : %s", dev
->vol
.migr_state
? "migrating" : "idle");
529 if (dev
->vol
.migr_state
)
530 printf(": %s", dev
->vol
.migr_type
? "rebuilding" : "initializing");
532 printf(" Map State : %s", map_state_str
[map
->map_state
]);
533 if (dev
->vol
.migr_state
) {
534 struct imsm_map
*map
= get_imsm_map(dev
, 1);
535 printf(" <-- %s", map_state_str
[map
->map_state
]);
538 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
541 static void print_imsm_disk(struct imsm_super
*mpb
, int index
, __u32 reserved
)
543 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
544 char str
[MAX_RAID_SERIAL_LEN
+ 1];
552 snprintf(str
, MAX_RAID_SERIAL_LEN
+ 1, "%s", disk
->serial
);
553 printf(" Disk%02d Serial : %s\n", index
, str
);
554 s
= __le32_to_cpu(disk
->status
);
555 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
556 s
&CONFIGURED_DISK
? " active" : "",
557 s
&FAILED_DISK
? " failed" : "",
558 s
&USABLE_DISK
? " usable" : "");
559 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
560 sz
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
561 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
562 human_size(sz
* 512));
565 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
);
567 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
569 struct intel_super
*super
= st
->sb
;
570 struct imsm_super
*mpb
= super
->anchor
;
571 char str
[MAX_SIGNATURE_LENGTH
];
576 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
579 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
580 printf(" Magic : %s\n", str
);
581 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
582 printf(" Version : %s\n", get_imsm_version(mpb
));
583 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
584 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
585 getinfo_super_imsm(st
, &info
);
586 fname_from_uuid(st
, &info
, nbuf
,'-');
587 printf(" UUID : %s\n", nbuf
+ 5);
588 sum
= __le32_to_cpu(mpb
->check_sum
);
589 printf(" Checksum : %08x %s\n", sum
,
590 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
591 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
592 printf(" Disks : %d\n", mpb
->num_disks
);
593 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
594 print_imsm_disk(mpb
, super
->disks
->index
, reserved
);
595 if (super
->bbm_log
) {
596 struct bbm_log
*log
= super
->bbm_log
;
599 printf("Bad Block Management Log:\n");
600 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
601 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
602 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
603 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
604 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
606 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
608 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
610 super
->current_vol
= i
;
611 getinfo_super_imsm(st
, &info
);
612 fname_from_uuid(st
, &info
, nbuf
, '-');
613 print_imsm_dev(dev
, nbuf
+ 5, super
->disks
->index
);
615 for (i
= 0; i
< mpb
->num_disks
; i
++) {
616 if (i
== super
->disks
->index
)
618 print_imsm_disk(mpb
, i
, reserved
);
622 static void brief_examine_super_imsm(struct supertype
*st
)
624 /* We just write a generic IMSM ARRAY entry */
628 struct intel_super
*super
= st
->sb
;
631 if (!super
->anchor
->num_raid_devs
)
634 getinfo_super_imsm(st
, &info
);
635 fname_from_uuid(st
, &info
, nbuf
,'-');
636 printf("ARRAY metadata=imsm auto=md UUID=%s\n", nbuf
+ 5);
637 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
638 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
640 super
->current_vol
= i
;
641 getinfo_super_imsm(st
, &info
);
642 fname_from_uuid(st
, &info
, nbuf1
,'-');
643 printf("ARRAY /dev/md/%.16s container=%s\n"
644 " member=%d auto=mdp UUID=%s\n",
645 dev
->volume
, nbuf
+ 5, i
, nbuf1
+ 5);
649 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
654 getinfo_super_imsm(st
, &info
);
655 fname_from_uuid(st
, &info
, nbuf
,'-');
656 printf("\n UUID : %s\n", nbuf
+ 5);
659 static void brief_detail_super_imsm(struct supertype
*st
)
663 getinfo_super_imsm(st
, &info
);
664 fname_from_uuid(st
, &info
, nbuf
,'-');
665 printf(" UUID=%s", nbuf
+ 5);
669 static int match_home_imsm(struct supertype
*st
, char *homehost
)
671 /* the imsm metadata format does not specify any host
672 * identification information. We return -1 since we can never
673 * confirm nor deny whether a given array is "meant" for this
674 * host. We rely on compare_super and the 'family_num' field to
675 * exclude member disks that do not belong, and we rely on
676 * mdadm.conf to specify the arrays that should be assembled.
677 * Auto-assembly may still pick up "foreign" arrays.
683 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
685 /* The uuid returned here is used for:
686 * uuid to put into bitmap file (Create, Grow)
687 * uuid for backup header when saving critical section (Grow)
688 * comparing uuids when re-adding a device into an array
689 * In these cases the uuid required is that of the data-array,
690 * not the device-set.
691 * uuid to recognise same set when adding a missing device back
692 * to an array. This is a uuid for the device-set.
694 * For each of these we can make do with a truncated
695 * or hashed uuid rather than the original, as long as
697 * In each case the uuid required is that of the data-array,
698 * not the device-set.
700 /* imsm does not track uuid's so we synthesis one using sha1 on
701 * - The signature (Which is constant for all imsm array, but no matter)
702 * - the family_num of the container
703 * - the index number of the volume
704 * - the 'serial' number of the volume.
705 * Hopefully these are all constant.
707 struct intel_super
*super
= st
->sb
;
711 struct imsm_dev
*dev
= NULL
;
714 sha1_process_bytes(super
->anchor
->sig
, MAX_SIGNATURE_LENGTH
, &ctx
);
715 sha1_process_bytes(&super
->anchor
->family_num
, sizeof(__u32
), &ctx
);
716 if (super
->current_vol
>= 0)
717 dev
= get_imsm_dev(super
, super
->current_vol
);
719 __u32 vol
= super
->current_vol
;
720 sha1_process_bytes(&vol
, sizeof(vol
), &ctx
);
721 sha1_process_bytes(dev
->volume
, MAX_RAID_SERIAL_LEN
, &ctx
);
723 sha1_finish_ctx(&ctx
, buf
);
724 memcpy(uuid
, buf
, 4*4);
729 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
731 __u8
*v
= get_imsm_version(mpb
);
732 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
733 char major
[] = { 0, 0, 0 };
734 char minor
[] = { 0 ,0, 0 };
735 char patch
[] = { 0, 0, 0 };
736 char *ver_parse
[] = { major
, minor
, patch
};
740 while (*v
!= '\0' && v
< end
) {
741 if (*v
!= '.' && j
< 2)
742 ver_parse
[i
][j
++] = *v
;
750 *m
= strtol(minor
, NULL
, 0);
751 *p
= strtol(patch
, NULL
, 0);
755 static int imsm_level_to_layout(int level
)
763 return ALGORITHM_LEFT_ASYMMETRIC
;
770 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
772 struct intel_super
*super
= st
->sb
;
773 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
774 struct imsm_map
*map
= get_imsm_map(dev
, 0);
776 info
->container_member
= super
->current_vol
;
777 info
->array
.raid_disks
= map
->num_members
;
778 info
->array
.level
= get_imsm_raid_level(map
);
779 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
780 info
->array
.md_minor
= -1;
781 info
->array
.ctime
= 0;
782 info
->array
.utime
= 0;
783 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
784 info
->array
.state
= !dev
->vol
.dirty
;
786 info
->disk
.major
= 0;
787 info
->disk
.minor
= 0;
789 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
790 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
791 memset(info
->uuid
, 0, sizeof(info
->uuid
));
793 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
794 info
->resync_start
= 0;
795 else if (dev
->vol
.migr_state
)
796 info
->resync_start
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
798 info
->resync_start
= ~0ULL;
800 strncpy(info
->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
801 info
->name
[MAX_RAID_SERIAL_LEN
] = 0;
803 info
->array
.major_version
= -1;
804 info
->array
.minor_version
= -2;
805 sprintf(info
->text_version
, "/%s/%d",
806 devnum2devname(st
->container_dev
),
807 info
->container_member
);
808 info
->safe_mode_delay
= 4000; /* 4 secs like the Matrix driver */
809 uuid_from_super_imsm(st
, info
->uuid
);
813 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
815 struct intel_super
*super
= st
->sb
;
816 struct imsm_disk
*disk
;
819 if (super
->current_vol
>= 0) {
820 getinfo_super_imsm_volume(st
, info
);
824 /* Set raid_disks to zero so that Assemble will always pull in valid
827 info
->array
.raid_disks
= 0;
828 info
->array
.level
= LEVEL_CONTAINER
;
829 info
->array
.layout
= 0;
830 info
->array
.md_minor
= -1;
831 info
->array
.ctime
= 0; /* N/A for imsm */
832 info
->array
.utime
= 0;
833 info
->array
.chunk_size
= 0;
835 info
->disk
.major
= 0;
836 info
->disk
.minor
= 0;
837 info
->disk
.raid_disk
= -1;
838 info
->reshape_active
= 0;
839 info
->array
.major_version
= -1;
840 info
->array
.minor_version
= -2;
841 strcpy(info
->text_version
, "imsm");
842 info
->safe_mode_delay
= 0;
843 info
->disk
.number
= -1;
844 info
->disk
.state
= 0;
848 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
850 disk
= &super
->disks
->disk
;
851 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
852 info
->component_size
= reserved
;
853 s
= __le32_to_cpu(disk
->status
);
854 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
855 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
856 info
->disk
.state
|= s
& SPARE_DISK
? 0 : (1 << MD_DISK_SYNC
);
859 /* only call uuid_from_super_imsm when this disk is part of a populated container,
860 * ->compare_super may have updated the 'num_raid_devs' field for spares
862 if (info
->disk
.state
& (1 << MD_DISK_SYNC
) || super
->anchor
->num_raid_devs
)
863 uuid_from_super_imsm(st
, info
->uuid
);
865 memcpy(info
->uuid
, uuid_match_any
, sizeof(int[4]));
868 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
869 char *update
, char *devname
, int verbose
,
870 int uuid_set
, char *homehost
)
874 /* For 'assemble' and 'force' we need to return non-zero if any
875 * change was made. For others, the return value is ignored.
876 * Update options are:
877 * force-one : This device looks a bit old but needs to be included,
878 * update age info appropriately.
879 * assemble: clear any 'faulty' flag to allow this device to
881 * force-array: Array is degraded but being forced, mark it clean
882 * if that will be needed to assemble it.
884 * newdev: not used ????
885 * grow: Array has gained a new device - this is currently for
887 * resync: mark as dirty so a resync will happen.
888 * name: update the name - preserving the homehost
890 * Following are not relevant for this imsm:
891 * sparc2.2 : update from old dodgey metadata
892 * super-minor: change the preferred_minor number
893 * summaries: update redundant counters.
894 * uuid: Change the uuid of the array to match watch is given
895 * homehost: update the recorded homehost
896 * _reshape_progress: record new reshape_progress position.
899 //struct intel_super *super = st->sb;
900 //struct imsm_super *mpb = super->mpb;
902 if (strcmp(update
, "grow") == 0) {
904 if (strcmp(update
, "resync") == 0) {
905 /* dev->vol.dirty = 1; */
908 /* IMSM has no concept of UUID or homehost */
913 static size_t disks_to_mpb_size(int disks
)
917 size
= sizeof(struct imsm_super
);
918 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
919 size
+= 2 * sizeof(struct imsm_dev
);
920 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
921 size
+= (4 - 2) * sizeof(struct imsm_map
);
922 /* 4 possible disk_ord_tbl's */
923 size
+= 4 * (disks
- 1) * sizeof(__u32
);
928 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
930 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
933 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
936 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
940 * 0 same, or first was empty, and second was copied
941 * 1 second had wrong number
945 struct intel_super
*first
= st
->sb
;
946 struct intel_super
*sec
= tst
->sb
;
954 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
957 /* if an anchor does not have num_raid_devs set then it is a free
960 if (first
->anchor
->num_raid_devs
> 0 &&
961 sec
->anchor
->num_raid_devs
> 0) {
962 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
966 /* if 'first' is a spare promote it to a populated mpb with sec's
969 if (first
->anchor
->num_raid_devs
== 0 &&
970 sec
->anchor
->num_raid_devs
> 0) {
973 /* we need to copy raid device info from sec if an allocation
974 * fails here we don't associate the spare
976 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++) {
977 first
->dev_tbl
[i
] = malloc(sizeof(struct imsm_dev
));
978 if (!first
->dev_tbl
) {
980 free(first
->dev_tbl
[i
]);
981 first
->dev_tbl
[i
] = NULL
;
983 fprintf(stderr
, "imsm: failed to associate spare\n");
986 *first
->dev_tbl
[i
] = *sec
->dev_tbl
[i
];
989 first
->anchor
->num_raid_devs
= sec
->anchor
->num_raid_devs
;
990 first
->anchor
->family_num
= sec
->anchor
->family_num
;
996 static void fd2devname(int fd
, char *name
)
1005 if (fstat(fd
, &st
) != 0)
1007 sprintf(path
, "/sys/dev/block/%d:%d",
1008 major(st
.st_rdev
), minor(st
.st_rdev
));
1010 rv
= readlink(path
, dname
, sizeof(dname
));
1015 nm
= strrchr(dname
, '/');
1017 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
1021 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
1023 static int imsm_read_serial(int fd
, char *devname
,
1024 __u8 serial
[MAX_RAID_SERIAL_LEN
])
1026 unsigned char scsi_serial
[255];
1032 memset(scsi_serial
, 0, sizeof(scsi_serial
));
1034 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
1036 if (rv
&& check_env("IMSM_DEVNAME_AS_SERIAL")) {
1037 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1038 fd2devname(fd
, (char *) serial
);
1045 Name
": Failed to retrieve serial for %s\n",
1050 /* trim leading whitespace */
1051 rsp_len
= scsi_serial
[3];
1052 rsp_buf
= (char *) &scsi_serial
[4];
1057 /* truncate len to the end of rsp_buf if necessary */
1058 if (c
+ MAX_RAID_SERIAL_LEN
> rsp_buf
+ rsp_len
)
1059 len
= rsp_len
- (c
- rsp_buf
);
1061 len
= MAX_RAID_SERIAL_LEN
;
1063 /* initialize the buffer and copy rsp_buf characters */
1064 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1065 memcpy(serial
, c
, len
);
1067 /* trim trailing whitespace starting with the last character copied */
1068 c
= (char *) &serial
[len
- 1];
1069 while (isspace(*c
) || *c
== '\0')
1075 static int serialcmp(__u8
*s1
, __u8
*s2
)
1077 return strncmp((char *) s1
, (char *) s2
, MAX_RAID_SERIAL_LEN
);
1080 static void serialcpy(__u8
*dest
, __u8
*src
)
1082 strncpy((char *) dest
, (char *) src
, MAX_RAID_SERIAL_LEN
);
1086 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
1093 __u8 serial
[MAX_RAID_SERIAL_LEN
];
1095 rv
= imsm_read_serial(fd
, devname
, serial
);
1100 /* check if this is a disk we have seen before. it may be a spare in
1101 * super->disks while the current anchor believes it is a raid member,
1102 * check if we need to update dl->index
1104 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1105 if (serialcmp(dl
->serial
, serial
) == 0)
1109 dl
= malloc(sizeof(*dl
));
1116 Name
": failed to allocate disk buffer for %s\n",
1123 dl
->major
= major(stb
.st_rdev
);
1124 dl
->minor
= minor(stb
.st_rdev
);
1125 dl
->next
= super
->disks
;
1126 dl
->fd
= keep_fd
? fd
: -1;
1127 dl
->devname
= devname
? strdup(devname
) : NULL
;
1128 serialcpy(dl
->serial
, serial
);
1130 } else if (keep_fd
) {
1135 /* look up this disk's index in the current anchor */
1136 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
1137 struct imsm_disk
*disk_iter
;
1139 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
1141 if (serialcmp(disk_iter
->serial
, dl
->serial
) == 0) {
1144 dl
->disk
= *disk_iter
;
1145 status
= __le32_to_cpu(dl
->disk
.status
);
1146 /* only set index on disks that are a member of a
1147 * populated contianer, i.e. one with raid_devs
1149 if (status
& FAILED_DISK
)
1151 else if (status
& SPARE_DISK
)
1160 /* no match, maybe a stale failed drive */
1161 if (i
== super
->anchor
->num_disks
&& dl
->index
>= 0) {
1162 dl
->disk
= *__get_imsm_disk(super
->anchor
, dl
->index
);
1163 if (__le32_to_cpu(dl
->disk
.status
) & FAILED_DISK
)
1173 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
1175 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
1179 /* When migrating map0 contains the 'destination' state while map1
1180 * contains the current state. When not migrating map0 contains the
1181 * current state. This routine assumes that map[0].map_state is set to
1182 * the current array state before being called.
1184 * Migration is indicated by one of the following states
1185 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
1186 * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal
1187 * map1state=unitialized)
1188 * 3/ Verify (Resync) (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
1190 * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
1191 * map1state=degraded)
1193 static void migrate(struct imsm_dev
*dev
, __u8 to_state
, int rebuild_resync
)
1195 struct imsm_map
*dest
;
1196 struct imsm_map
*src
= get_imsm_map(dev
, 0);
1198 dev
->vol
.migr_state
= 1;
1199 dev
->vol
.migr_type
= rebuild_resync
;
1200 dev
->vol
.curr_migr_unit
= 0;
1201 dest
= get_imsm_map(dev
, 1);
1203 memcpy(dest
, src
, sizeof_imsm_map(src
));
1204 src
->map_state
= to_state
;
1207 static void end_migration(struct imsm_dev
*dev
, __u8 map_state
)
1209 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1211 dev
->vol
.migr_state
= 0;
1212 dev
->vol
.curr_migr_unit
= 0;
1213 map
->map_state
= map_state
;
1217 static int parse_raid_devices(struct intel_super
*super
)
1220 struct imsm_dev
*dev_new
;
1221 size_t len
, len_migr
;
1222 size_t space_needed
= 0;
1223 struct imsm_super
*mpb
= super
->anchor
;
1225 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
1226 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
1228 len
= sizeof_imsm_dev(dev_iter
, 0);
1229 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
1231 space_needed
+= len_migr
- len
;
1233 dev_new
= malloc(len_migr
);
1236 imsm_copy_dev(dev_new
, dev_iter
);
1237 super
->dev_tbl
[i
] = dev_new
;
1240 /* ensure that super->buf is large enough when all raid devices
1243 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
1246 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
1247 if (posix_memalign(&buf
, 512, len
) != 0)
1250 memcpy(buf
, super
->buf
, len
);
1259 /* retrieve a pointer to the bbm log which starts after all raid devices */
1260 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
1264 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
1266 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
1272 static void __free_imsm(struct intel_super
*super
, int free_disks
);
1274 /* load_imsm_mpb - read matrix metadata
1275 * allocates super->mpb to be freed by free_super
1277 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
1279 unsigned long long dsize
;
1280 unsigned long long sectors
;
1282 struct imsm_super
*anchor
;
1286 get_dev_size(fd
, NULL
, &dsize
);
1288 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
1291 Name
": Cannot seek to anchor block on %s: %s\n",
1292 devname
, strerror(errno
));
1296 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
1299 Name
": Failed to allocate imsm anchor buffer"
1300 " on %s\n", devname
);
1303 if (read(fd
, anchor
, 512) != 512) {
1306 Name
": Cannot read anchor block on %s: %s\n",
1307 devname
, strerror(errno
));
1312 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1315 Name
": no IMSM anchor on %s\n", devname
);
1320 __free_imsm(super
, 0);
1321 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1322 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1325 Name
": unable to allocate %zu byte mpb buffer\n",
1330 memcpy(super
->buf
, anchor
, 512);
1332 sectors
= mpb_sectors(anchor
) - 1;
1335 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1337 rc
= parse_raid_devices(super
);
1341 /* read the extended mpb */
1342 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1345 Name
": Cannot seek to extended mpb on %s: %s\n",
1346 devname
, strerror(errno
));
1350 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1353 Name
": Cannot read extended mpb on %s: %s\n",
1354 devname
, strerror(errno
));
1358 check_sum
= __gen_imsm_checksum(super
->anchor
);
1359 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1362 Name
": IMSM checksum %x != %x on %s\n",
1363 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1368 /* FIXME the BBM log is disk specific so we cannot use this global
1369 * buffer for all disks. Ok for now since we only look at the global
1370 * bbm_log_size parameter to gate assembly
1372 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1374 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1376 rc
= parse_raid_devices(super
);
1381 static void __free_imsm_disk(struct dl
*d
)
1390 static void free_imsm_disks(struct intel_super
*super
)
1394 while (super
->disks
) {
1396 super
->disks
= d
->next
;
1397 __free_imsm_disk(d
);
1399 while (super
->missing
) {
1401 super
->missing
= d
->next
;
1402 __free_imsm_disk(d
);
1407 /* free all the pieces hanging off of a super pointer */
1408 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1417 free_imsm_disks(super
);
1418 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1419 if (super
->dev_tbl
[i
]) {
1420 free(super
->dev_tbl
[i
]);
1421 super
->dev_tbl
[i
] = NULL
;
1425 static void free_imsm(struct intel_super
*super
)
1427 __free_imsm(super
, 1);
1431 static void free_super_imsm(struct supertype
*st
)
1433 struct intel_super
*super
= st
->sb
;
1442 static struct intel_super
*alloc_super(int creating_imsm
)
1444 struct intel_super
*super
= malloc(sizeof(*super
));
1447 memset(super
, 0, sizeof(*super
));
1448 super
->creating_imsm
= creating_imsm
;
1449 super
->current_vol
= -1;
1456 /* find_missing - helper routine for load_super_imsm_all that identifies
1457 * disks that have disappeared from the system. This routine relies on
1458 * the mpb being uptodate, which it is at load time.
1460 static int find_missing(struct intel_super
*super
)
1463 struct imsm_super
*mpb
= super
->anchor
;
1465 struct imsm_disk
*disk
;
1468 for (i
= 0; i
< mpb
->num_disks
; i
++) {
1469 disk
= __get_imsm_disk(mpb
, i
);
1470 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1471 if (serialcmp(dl
->disk
.serial
, disk
->serial
) == 0)
1475 /* ok we have a 'disk' without a live entry in
1478 status
= __le32_to_cpu(disk
->status
);
1479 if (status
& FAILED_DISK
|| !(status
& USABLE_DISK
))
1480 continue; /* never mind, already marked */
1482 dl
= malloc(sizeof(*dl
));
1488 dl
->devname
= strdup("missing");
1490 serialcpy(dl
->serial
, disk
->serial
);
1492 dl
->next
= super
->missing
;
1493 super
->missing
= dl
;
1499 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1500 char *devname
, int keep_fd
)
1503 struct intel_super
*super
;
1504 struct mdinfo
*sd
, *best
= NULL
;
1511 /* check if this disk is a member of an active array */
1512 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1516 if (sra
->array
.major_version
!= -1 ||
1517 sra
->array
.minor_version
!= -2 ||
1518 strcmp(sra
->text_version
, "imsm") != 0)
1521 super
= alloc_super(0);
1525 /* find the most up to date disk in this array, skipping spares */
1526 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1527 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1528 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1533 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1537 if (super
->anchor
->num_raid_devs
== 0)
1540 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1541 if (!best
|| gen
> bestgen
) {
1556 /* load the most up to date anchor */
1557 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1558 dfd
= dev_open(nm
, O_RDONLY
);
1563 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1570 /* re-parse the disk list with the current anchor */
1571 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1572 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1573 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1578 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1584 if (find_missing(super
) != 0) {
1589 if (st
->subarray
[0]) {
1590 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1591 super
->current_vol
= atoi(st
->subarray
);
1597 st
->container_dev
= fd2devnum(fd
);
1598 if (st
->ss
== NULL
) {
1599 st
->ss
= &super_imsm
;
1600 st
->minor_version
= 0;
1601 st
->max_devs
= IMSM_MAX_DEVICES
;
1603 st
->loaded_container
= 1;
1609 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1611 struct intel_super
*super
;
1615 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1618 if (st
->subarray
[0])
1619 return 1; /* FIXME */
1621 super
= alloc_super(0);
1624 Name
": malloc of %zu failed.\n",
1629 rv
= load_imsm_mpb(fd
, super
, devname
);
1634 Name
": Failed to load all information "
1635 "sections on %s\n", devname
);
1641 if (st
->ss
== NULL
) {
1642 st
->ss
= &super_imsm
;
1643 st
->minor_version
= 0;
1644 st
->max_devs
= IMSM_MAX_DEVICES
;
1646 st
->loaded_container
= 0;
1651 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1653 if (info
->level
== 1)
1655 return info
->chunk_size
>> 9;
1658 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1662 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1663 if (info
->level
== 1)
1669 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1671 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1674 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1675 unsigned long long size
, char *name
,
1676 char *homehost
, int *uuid
)
1678 /* We are creating a volume inside a pre-existing container.
1679 * so st->sb is already set.
1681 struct intel_super
*super
= st
->sb
;
1682 struct imsm_super
*mpb
= super
->anchor
;
1683 struct imsm_dev
*dev
;
1684 struct imsm_vol
*vol
;
1685 struct imsm_map
*map
;
1686 int idx
= mpb
->num_raid_devs
;
1688 unsigned long long array_blocks
;
1690 size_t size_old
, size_new
;
1692 if (mpb
->num_raid_devs
>= 2) {
1693 fprintf(stderr
, Name
": This imsm-container already has the "
1694 "maximum of 2 volumes\n");
1698 /* ensure the mpb is large enough for the new data */
1699 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1700 size_new
= disks_to_mpb_size(info
->nr_disks
);
1701 if (size_new
> size_old
) {
1703 size_t size_round
= ROUND_UP(size_new
, 512);
1705 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1706 fprintf(stderr
, Name
": could not allocate new mpb\n");
1709 memcpy(mpb_new
, mpb
, size_old
);
1712 super
->anchor
= mpb_new
;
1713 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1714 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1716 super
->current_vol
= idx
;
1717 /* when creating the first raid device in this container set num_disks
1718 * to zero, i.e. delete this spare and add raid member devices in
1719 * add_to_super_imsm_volume()
1721 if (super
->current_vol
== 0)
1723 sprintf(st
->subarray
, "%d", idx
);
1724 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1726 fprintf(stderr
, Name
": could not allocate raid device\n");
1729 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1730 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1731 info
->layout
, info
->chunk_size
,
1733 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1734 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1735 dev
->status
= __cpu_to_le32(0);
1736 dev
->reserved_blocks
= __cpu_to_le32(0);
1738 vol
->migr_state
= 0;
1739 vol
->migr_type
= MIGR_INIT
;
1741 vol
->curr_migr_unit
= 0;
1742 for (i
= 0; i
< idx
; i
++) {
1743 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1744 struct imsm_map
*pmap
= get_imsm_map(prev
, 0);
1746 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1747 offset
+= IMSM_RESERVED_SECTORS
;
1749 map
= get_imsm_map(dev
, 0);
1750 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1751 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1752 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1753 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1754 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1755 IMSM_T_STATE_NORMAL
;
1757 if (info
->level
== 1 && info
->raid_disks
> 2) {
1758 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1759 "in a raid1 volume\n");
1762 if (info
->level
== 10)
1763 map
->raid_level
= 1;
1765 map
->raid_level
= info
->level
;
1767 map
->num_members
= info
->raid_disks
;
1768 for (i
= 0; i
< map
->num_members
; i
++) {
1769 /* initialized in add_to_super */
1770 set_imsm_ord_tbl_ent(map
, i
, 0);
1772 mpb
->num_raid_devs
++;
1773 super
->dev_tbl
[super
->current_vol
] = dev
;
1778 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1779 unsigned long long size
, char *name
,
1780 char *homehost
, int *uuid
)
1782 /* This is primarily called by Create when creating a new array.
1783 * We will then get add_to_super called for each component, and then
1784 * write_init_super called to write it out to each device.
1785 * For IMSM, Create can create on fresh devices or on a pre-existing
1787 * To create on a pre-existing array a different method will be called.
1788 * This one is just for fresh drives.
1790 struct intel_super
*super
;
1791 struct imsm_super
*mpb
;
1799 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1802 super
= alloc_super(1);
1805 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1806 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1811 memset(mpb
, 0, mpb_size
);
1813 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1814 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1815 strlen(MPB_VERSION_RAID5
));
1816 mpb
->mpb_size
= mpb_size
;
1823 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1824 int fd
, char *devname
)
1826 struct intel_super
*super
= st
->sb
;
1827 struct imsm_super
*mpb
= super
->anchor
;
1829 struct imsm_dev
*dev
;
1830 struct imsm_map
*map
;
1833 dev
= get_imsm_dev(super
, super
->current_vol
);
1834 map
= get_imsm_map(dev
, 0);
1836 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1837 if (dl
->major
== dk
->major
&&
1838 dl
->minor
== dk
->minor
)
1841 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1844 /* add a pristine spare to the metadata */
1845 if (dl
->index
< 0) {
1846 dl
->index
= super
->anchor
->num_disks
;
1847 super
->anchor
->num_disks
++;
1849 set_imsm_ord_tbl_ent(map
, dk
->number
, dl
->index
);
1850 status
= CONFIGURED_DISK
| USABLE_DISK
;
1851 dl
->disk
.status
= __cpu_to_le32(status
);
1853 /* if we are creating the first raid device update the family number */
1854 if (super
->current_vol
== 0) {
1856 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
1857 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
1861 sum
= __gen_imsm_checksum(mpb
);
1862 mpb
->family_num
= __cpu_to_le32(sum
);
1866 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1867 int fd
, char *devname
)
1869 struct intel_super
*super
= st
->sb
;
1871 unsigned long long size
;
1876 if (super
->current_vol
>= 0) {
1877 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1882 dd
= malloc(sizeof(*dd
));
1885 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1888 memset(dd
, 0, sizeof(*dd
));
1889 dd
->major
= major(stb
.st_rdev
);
1890 dd
->minor
= minor(stb
.st_rdev
);
1892 dd
->devname
= devname
? strdup(devname
) : NULL
;
1894 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1897 Name
": failed to retrieve scsi serial, aborting\n");
1902 get_dev_size(fd
, NULL
, &size
);
1904 status
= USABLE_DISK
| SPARE_DISK
;
1905 serialcpy(dd
->disk
.serial
, dd
->serial
);
1906 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
1907 dd
->disk
.status
= __cpu_to_le32(status
);
1908 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1909 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
1911 dd
->disk
.scsi_id
= __cpu_to_le32(0);
1913 if (st
->update_tail
) {
1914 dd
->next
= super
->add
;
1917 dd
->next
= super
->disks
;
1922 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1924 /* spare records have their own family number and do not have any defined raid
1927 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
1929 struct imsm_super mpb_save
;
1930 struct imsm_super
*mpb
= super
->anchor
;
1935 mpb
->num_raid_devs
= 0;
1937 mpb
->mpb_size
= sizeof(struct imsm_super
);
1938 mpb
->generation_num
= __cpu_to_le32(1UL);
1940 for (d
= super
->disks
; d
; d
= d
->next
) {
1944 mpb
->disk
[0] = d
->disk
;
1945 sum
= __gen_imsm_checksum(mpb
);
1946 mpb
->family_num
= __cpu_to_le32(sum
);
1947 sum
= __gen_imsm_checksum(mpb
);
1948 mpb
->check_sum
= __cpu_to_le32(sum
);
1950 if (store_imsm_mpb(d
->fd
, super
)) {
1951 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1952 __func__
, d
->major
, d
->minor
, strerror(errno
));
1966 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1968 struct imsm_super
*mpb
= super
->anchor
;
1974 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
1976 /* 'generation' is incremented everytime the metadata is written */
1977 generation
= __le32_to_cpu(mpb
->generation_num
);
1979 mpb
->generation_num
= __cpu_to_le32(generation
);
1981 mpb_size
+= sizeof(struct imsm_disk
) * mpb
->num_disks
;
1982 for (d
= super
->disks
; d
; d
= d
->next
) {
1986 mpb
->disk
[d
->index
] = d
->disk
;
1988 for (d
= super
->missing
; d
; d
= d
->next
)
1989 mpb
->disk
[d
->index
] = d
->disk
;
1991 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1992 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1994 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1995 mpb_size
+= sizeof_imsm_dev(dev
, 0);
1997 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
1998 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
2000 /* recalculate checksum */
2001 sum
= __gen_imsm_checksum(mpb
);
2002 mpb
->check_sum
= __cpu_to_le32(sum
);
2004 /* write the mpb for disks that compose raid devices */
2005 for (d
= super
->disks
; d
; d
= d
->next
) {
2008 if (store_imsm_mpb(d
->fd
, super
))
2009 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
2010 __func__
, d
->major
, d
->minor
, strerror(errno
));
2018 return write_super_imsm_spares(super
, doclose
);
2024 static int create_array(struct supertype
*st
)
2027 struct imsm_update_create_array
*u
;
2028 struct intel_super
*super
= st
->sb
;
2029 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
2031 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0);
2034 fprintf(stderr
, "%s: failed to allocate update buffer\n",
2039 u
->type
= update_create_array
;
2040 u
->dev_idx
= super
->current_vol
;
2041 imsm_copy_dev(&u
->dev
, dev
);
2042 append_metadata_update(st
, u
, len
);
2047 static int _add_disk(struct supertype
*st
)
2049 struct intel_super
*super
= st
->sb
;
2051 struct imsm_update_add_disk
*u
;
2059 fprintf(stderr
, "%s: failed to allocate update buffer\n",
2064 u
->type
= update_add_disk
;
2065 append_metadata_update(st
, u
, len
);
2070 static int write_init_super_imsm(struct supertype
*st
)
2072 if (st
->update_tail
) {
2073 /* queue the recently created array / added disk
2074 * as a metadata update */
2075 struct intel_super
*super
= st
->sb
;
2079 /* determine if we are creating a volume or adding a disk */
2080 if (super
->current_vol
< 0) {
2081 /* in the add disk case we are running in mdmon
2082 * context, so don't close fd's
2084 return _add_disk(st
);
2086 rv
= create_array(st
);
2088 for (d
= super
->disks
; d
; d
= d
->next
) {
2095 return write_super_imsm(st
->sb
, 1);
2099 static int store_zero_imsm(struct supertype
*st
, int fd
)
2101 unsigned long long dsize
;
2104 get_dev_size(fd
, NULL
, &dsize
);
2106 /* first block is stored on second to last sector of the disk */
2107 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2110 if (posix_memalign(&buf
, 512, 512) != 0)
2113 memset(buf
, 0, 512);
2114 if (write(fd
, buf
, 512) != 512)
2119 static int imsm_bbm_log_size(struct imsm_super
*mpb
)
2121 return __le32_to_cpu(mpb
->bbm_log_size
);
2125 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
2126 int layout
, int raiddisks
, int chunk
,
2127 unsigned long long size
, char *dev
,
2128 unsigned long long *freesize
,
2132 unsigned long long ldsize
;
2134 if (level
!= LEVEL_CONTAINER
)
2139 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2142 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
2143 dev
, strerror(errno
));
2146 if (!get_dev_size(fd
, dev
, &ldsize
)) {
2152 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
2157 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
2158 * FIX ME add ahci details
2160 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
2161 int layout
, int raiddisks
, int chunk
,
2162 unsigned long long size
, char *dev
,
2163 unsigned long long *freesize
,
2167 struct intel_super
*super
= st
->sb
;
2169 unsigned long long pos
= 0;
2170 unsigned long long maxsize
;
2174 if (level
== LEVEL_CONTAINER
)
2177 if (level
== 1 && raiddisks
> 2) {
2179 fprintf(stderr
, Name
": imsm does not support more "
2180 "than 2 in a raid1 configuration\n");
2184 /* We must have the container info already read in. */
2189 /* General test: make sure there is space for
2190 * 'raiddisks' device extents of size 'size' at a given
2193 unsigned long long minsize
= size
*2 /* convert to blocks */;
2194 unsigned long long start_offset
= ~0ULL;
2197 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
2198 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2203 e
= get_extents(super
, dl
);
2206 unsigned long long esize
;
2207 esize
= e
[i
].start
- pos
;
2208 if (esize
>= minsize
)
2210 if (found
&& start_offset
== ~0ULL) {
2213 } else if (found
&& pos
!= start_offset
) {
2217 pos
= e
[i
].start
+ e
[i
].size
;
2219 } while (e
[i
-1].size
);
2224 if (dcnt
< raiddisks
) {
2226 fprintf(stderr
, Name
": imsm: Not enough "
2227 "devices with space for this array "
2234 /* This device must be a member of the set */
2235 if (stat(dev
, &stb
) < 0)
2237 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
2239 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2240 if (dl
->major
== major(stb
.st_rdev
) &&
2241 dl
->minor
== minor(stb
.st_rdev
))
2246 fprintf(stderr
, Name
": %s is not in the "
2247 "same imsm set\n", dev
);
2250 e
= get_extents(super
, dl
);
2254 unsigned long long esize
;
2255 esize
= e
[i
].start
- pos
;
2256 if (esize
>= maxsize
)
2258 pos
= e
[i
].start
+ e
[i
].size
;
2260 } while (e
[i
-1].size
);
2261 *freesize
= maxsize
;
2266 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
2267 int raiddisks
, int chunk
, unsigned long long size
,
2268 char *dev
, unsigned long long *freesize
,
2274 /* if given unused devices create a container
2275 * if given given devices in a container create a member volume
2277 if (level
== LEVEL_CONTAINER
) {
2278 /* Must be a fresh device to add to a container */
2279 return validate_geometry_imsm_container(st
, level
, layout
,
2280 raiddisks
, chunk
, size
,
2286 /* creating in a given container */
2287 return validate_geometry_imsm_volume(st
, level
, layout
,
2288 raiddisks
, chunk
, size
,
2289 dev
, freesize
, verbose
);
2292 /* limit creation to the following levels */
2304 /* This device needs to be a device in an 'imsm' container */
2305 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2309 Name
": Cannot create this array on device %s\n",
2314 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
2316 fprintf(stderr
, Name
": Cannot open %s: %s\n",
2317 dev
, strerror(errno
));
2320 /* Well, it is in use by someone, maybe an 'imsm' container. */
2321 cfd
= open_container(fd
);
2325 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
2329 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
2331 if (sra
&& sra
->array
.major_version
== -1 &&
2332 strcmp(sra
->text_version
, "imsm") == 0) {
2333 /* This is a member of a imsm container. Load the container
2334 * and try to create a volume
2336 struct intel_super
*super
;
2338 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
2340 st
->container_dev
= fd2devnum(cfd
);
2342 return validate_geometry_imsm_volume(st
, level
, layout
,
2348 } else /* may belong to another container */
2353 #endif /* MDASSEMBLE */
2355 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
2357 /* Given a container loaded by load_super_imsm_all,
2358 * extract information about all the arrays into
2361 * For each imsm_dev create an mdinfo, fill it in,
2362 * then look for matching devices in super->disks
2363 * and create appropriate device mdinfo.
2365 struct intel_super
*super
= st
->sb
;
2366 struct imsm_super
*mpb
= super
->anchor
;
2367 struct mdinfo
*rest
= NULL
;
2370 /* do not assemble arrays that might have bad blocks */
2371 if (imsm_bbm_log_size(super
->anchor
)) {
2372 fprintf(stderr
, Name
": BBM log found in metadata. "
2373 "Cannot activate array(s).\n");
2377 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2378 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
2379 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2380 struct mdinfo
*this;
2383 this = malloc(sizeof(*this));
2384 memset(this, 0, sizeof(*this));
2387 super
->current_vol
= i
;
2388 getinfo_super_imsm_volume(st
, this);
2389 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
2390 struct mdinfo
*info_d
;
2398 idx
= get_imsm_disk_idx(dev
, slot
);
2399 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
2400 for (d
= super
->disks
; d
; d
= d
->next
)
2401 if (d
->index
== idx
)
2407 s
= d
? __le32_to_cpu(d
->disk
.status
) : 0;
2408 if (s
& FAILED_DISK
)
2410 if (!(s
& USABLE_DISK
))
2412 if (ord
& IMSM_ORD_REBUILD
)
2416 * if we skip some disks the array will be assmebled degraded;
2417 * reset resync start to avoid a dirty-degraded situation
2419 * FIXME handle dirty degraded
2421 if (skip
&& !dev
->vol
.dirty
)
2422 this->resync_start
= ~0ULL;
2426 info_d
= malloc(sizeof(*info_d
));
2428 fprintf(stderr
, Name
": failed to allocate disk"
2429 " for volume %s\n", (char *) dev
->volume
);
2434 memset(info_d
, 0, sizeof(*info_d
));
2435 info_d
->next
= this->devs
;
2436 this->devs
= info_d
;
2438 info_d
->disk
.number
= d
->index
;
2439 info_d
->disk
.major
= d
->major
;
2440 info_d
->disk
.minor
= d
->minor
;
2441 info_d
->disk
.raid_disk
= slot
;
2443 this->array
.working_disks
++;
2445 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
2446 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2447 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2449 strcpy(info_d
->name
, d
->devname
);
2459 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
2462 struct intel_super
*super
= c
->sb
;
2463 struct imsm_super
*mpb
= super
->anchor
;
2465 if (atoi(inst
) >= mpb
->num_raid_devs
) {
2466 fprintf(stderr
, "%s: subarry index %d, out of range\n",
2467 __func__
, atoi(inst
));
2471 dprintf("imsm: open_new %s\n", inst
);
2472 a
->info
.container_member
= atoi(inst
);
2476 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
, int failed
)
2478 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2481 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
2482 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
2484 switch (get_imsm_raid_level(map
)) {
2486 return IMSM_T_STATE_FAILED
;
2489 if (failed
< map
->num_members
)
2490 return IMSM_T_STATE_DEGRADED
;
2492 return IMSM_T_STATE_FAILED
;
2497 * check to see if any mirrors have failed, otherwise we
2498 * are degraded. Even numbered slots are mirrored on
2502 /* gcc -Os complains that this is unused */
2503 int insync
= insync
;
2505 for (i
= 0; i
< map
->num_members
; i
++) {
2506 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
2507 int idx
= ord_to_idx(ord
);
2508 struct imsm_disk
*disk
;
2510 /* reset the potential in-sync count on even-numbered
2511 * slots. num_copies is always 2 for imsm raid10
2516 disk
= get_imsm_disk(super
, idx
);
2518 __le32_to_cpu(disk
->status
) & FAILED_DISK
||
2519 ord
& IMSM_ORD_REBUILD
)
2522 /* no in-sync disks left in this mirror the
2526 return IMSM_T_STATE_FAILED
;
2529 return IMSM_T_STATE_DEGRADED
;
2533 return IMSM_T_STATE_DEGRADED
;
2535 return IMSM_T_STATE_FAILED
;
2541 return map
->map_state
;
2544 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
)
2548 struct imsm_disk
*disk
;
2549 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2551 for (i
= 0; i
< map
->num_members
; i
++) {
2552 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
2553 int idx
= ord_to_idx(ord
);
2555 disk
= get_imsm_disk(super
, idx
);
2557 __le32_to_cpu(disk
->status
) & FAILED_DISK
||
2558 ord
& IMSM_ORD_REBUILD
)
2565 static int is_resyncing(struct imsm_dev
*dev
)
2567 struct imsm_map
*migr_map
;
2569 if (!dev
->vol
.migr_state
)
2572 if (dev
->vol
.migr_type
== MIGR_INIT
)
2575 migr_map
= get_imsm_map(dev
, 1);
2577 if (migr_map
->map_state
== IMSM_T_STATE_NORMAL
)
2583 static int is_rebuilding(struct imsm_dev
*dev
)
2585 struct imsm_map
*migr_map
;
2587 if (!dev
->vol
.migr_state
)
2590 if (dev
->vol
.migr_type
!= MIGR_REBUILD
)
2593 migr_map
= get_imsm_map(dev
, 1);
2595 if (migr_map
->map_state
== IMSM_T_STATE_DEGRADED
)
2601 static void mark_failure(struct imsm_disk
*disk
)
2603 __u32 status
= __le32_to_cpu(disk
->status
);
2605 if (status
& FAILED_DISK
)
2607 status
|= FAILED_DISK
;
2608 disk
->status
= __cpu_to_le32(status
);
2609 disk
->scsi_id
= __cpu_to_le32(~(__u32
)0);
2610 memmove(&disk
->serial
[0], &disk
->serial
[1], MAX_RAID_SERIAL_LEN
- 1);
2613 /* Handle dirty -> clean transititions and resync. Degraded and rebuild
2614 * states are handled in imsm_set_disk() with one exception, when a
2615 * resync is stopped due to a new failure this routine will set the
2616 * 'degraded' state for the array.
2618 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
2620 int inst
= a
->info
.container_member
;
2621 struct intel_super
*super
= a
->container
->sb
;
2622 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2623 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2624 int failed
= imsm_count_failed(super
, dev
);
2625 __u8 map_state
= imsm_check_degraded(super
, dev
, failed
);
2627 /* before we activate this array handle any missing disks */
2628 if (consistent
== 2 && super
->missing
) {
2631 dprintf("imsm: mark missing\n");
2632 end_migration(dev
, map_state
);
2633 for (dl
= super
->missing
; dl
; dl
= dl
->next
)
2634 mark_failure(&dl
->disk
);
2635 super
->updates_pending
++;
2638 if (consistent
== 2 &&
2639 (!is_resync_complete(a
) ||
2640 map_state
!= IMSM_T_STATE_NORMAL
||
2641 dev
->vol
.migr_state
))
2644 if (is_resync_complete(a
)) {
2645 /* complete intialization / resync,
2646 * recovery is completed in ->set_disk
2648 if (is_resyncing(dev
)) {
2649 dprintf("imsm: mark resync done\n");
2650 end_migration(dev
, map_state
);
2651 super
->updates_pending
++;
2653 } else if (!is_resyncing(dev
) && !failed
) {
2654 /* mark the start of the init process if nothing is failed */
2655 dprintf("imsm: mark resync start (%llu)\n", a
->resync_start
);
2656 if (map
->map_state
== IMSM_T_STATE_NORMAL
)
2657 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_REBUILD
);
2659 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_INIT
);
2660 super
->updates_pending
++;
2663 /* check if we can update the migration checkpoint */
2664 if (dev
->vol
.migr_state
&&
2665 __le32_to_cpu(dev
->vol
.curr_migr_unit
) != a
->resync_start
) {
2666 dprintf("imsm: checkpoint migration (%llu)\n", a
->resync_start
);
2667 dev
->vol
.curr_migr_unit
= __cpu_to_le32(a
->resync_start
);
2668 super
->updates_pending
++;
2671 /* mark dirty / clean */
2672 if (dev
->vol
.dirty
!= !consistent
) {
2673 dprintf("imsm: mark '%s' (%llu)\n",
2674 consistent
? "clean" : "dirty", a
->resync_start
);
2679 super
->updates_pending
++;
2684 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2686 int inst
= a
->info
.container_member
;
2687 struct intel_super
*super
= a
->container
->sb
;
2688 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2689 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2690 struct imsm_disk
*disk
;
2696 if (n
> map
->num_members
)
2697 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2698 n
, map
->num_members
- 1);
2703 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2705 ord
= get_imsm_ord_tbl_ent(dev
, n
);
2706 disk
= get_imsm_disk(super
, ord_to_idx(ord
));
2708 /* check for new failures */
2709 status
= __le32_to_cpu(disk
->status
);
2710 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2712 super
->updates_pending
++;
2715 /* check if in_sync */
2716 if (state
& DS_INSYNC
&& ord
& IMSM_ORD_REBUILD
) {
2717 struct imsm_map
*migr_map
= get_imsm_map(dev
, 1);
2719 set_imsm_ord_tbl_ent(migr_map
, n
, ord_to_idx(ord
));
2720 super
->updates_pending
++;
2723 failed
= imsm_count_failed(super
, dev
);
2724 map_state
= imsm_check_degraded(super
, dev
, failed
);
2726 /* check if recovery complete, newly degraded, or failed */
2727 if (map_state
== IMSM_T_STATE_NORMAL
&& is_rebuilding(dev
)) {
2728 end_migration(dev
, map_state
);
2729 super
->updates_pending
++;
2730 } else if (map_state
== IMSM_T_STATE_DEGRADED
&&
2731 map
->map_state
!= map_state
&&
2732 !dev
->vol
.migr_state
) {
2733 dprintf("imsm: mark degraded\n");
2734 map
->map_state
= map_state
;
2735 super
->updates_pending
++;
2736 } else if (map_state
== IMSM_T_STATE_FAILED
&&
2737 map
->map_state
!= map_state
) {
2738 dprintf("imsm: mark failed\n");
2739 end_migration(dev
, map_state
);
2740 super
->updates_pending
++;
2744 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2746 struct imsm_super
*mpb
= super
->anchor
;
2747 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2748 unsigned long long dsize
;
2749 unsigned long long sectors
;
2751 get_dev_size(fd
, NULL
, &dsize
);
2753 if (mpb_size
> 512) {
2754 /* -1 to account for anchor */
2755 sectors
= mpb_sectors(mpb
) - 1;
2757 /* write the extended mpb to the sectors preceeding the anchor */
2758 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2761 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2765 /* first block is stored on second to last sector of the disk */
2766 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2769 if (write(fd
, super
->buf
, 512) != 512)
2775 static void imsm_sync_metadata(struct supertype
*container
)
2777 struct intel_super
*super
= container
->sb
;
2779 if (!super
->updates_pending
)
2782 write_super_imsm(super
, 0);
2784 super
->updates_pending
= 0;
2787 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
2789 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2790 int i
= get_imsm_disk_idx(dev
, idx
);
2793 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2797 if (dl
&& __le32_to_cpu(dl
->disk
.status
) & FAILED_DISK
)
2801 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
2806 static struct dl
*imsm_add_spare(struct intel_super
*super
, int slot
, struct active_array
*a
)
2808 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2809 int idx
= get_imsm_disk_idx(dev
, slot
);
2810 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2811 unsigned long long esize
;
2812 unsigned long long pos
;
2821 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2822 /* If in this array, skip */
2823 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2824 if (d
->state_fd
>= 0 &&
2825 d
->disk
.major
== dl
->major
&&
2826 d
->disk
.minor
== dl
->minor
) {
2827 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2833 /* skip in use or failed drives */
2834 status
= __le32_to_cpu(dl
->disk
.status
);
2835 if (status
& FAILED_DISK
|| idx
== dl
->index
) {
2836 dprintf("%x:%x status ( %s%s)\n",
2837 dl
->major
, dl
->minor
,
2838 status
& FAILED_DISK
? "failed " : "",
2839 idx
== dl
->index
? "in use " : "");
2843 /* Does this unused device have the requisite free space?
2844 * We need a->info.component_size sectors
2846 ex
= get_extents(super
, dl
);
2848 dprintf("cannot get extents\n");
2854 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2857 /* check that we can start at pba_of_lba0 with
2858 * a->info.component_size of space
2860 esize
= ex
[j
].start
- pos
;
2861 if (array_start
>= pos
&&
2862 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2866 pos
= ex
[j
].start
+ ex
[j
].size
;
2869 } while (ex
[j
-1].size
);
2873 dprintf("%x:%x does not have %llu at %d\n",
2874 dl
->major
, dl
->minor
,
2875 a
->info
.component_size
,
2876 __le32_to_cpu(map
->pba_of_lba0
));
2886 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2887 struct metadata_update
**updates
)
2890 * Find a device with unused free space and use it to replace a
2891 * failed/vacant region in an array. We replace failed regions one a
2892 * array at a time. The result is that a new spare disk will be added
2893 * to the first failed array and after the monitor has finished
2894 * propagating failures the remainder will be consumed.
2896 * FIXME add a capability for mdmon to request spares from another
2900 struct intel_super
*super
= a
->container
->sb
;
2901 int inst
= a
->info
.container_member
;
2902 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2903 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2904 int failed
= a
->info
.array
.raid_disks
;
2905 struct mdinfo
*rv
= NULL
;
2908 struct metadata_update
*mu
;
2910 struct imsm_update_activate_spare
*u
;
2914 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2915 if ((d
->curr_state
& DS_FAULTY
) &&
2917 /* wait for Removal to happen */
2919 if (d
->state_fd
>= 0)
2923 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2924 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2925 if (imsm_check_degraded(super
, dev
, failed
) != IMSM_T_STATE_DEGRADED
)
2928 /* For each slot, if it is not working, find a spare */
2929 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2930 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2931 if (d
->disk
.raid_disk
== i
)
2933 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2934 if (d
&& (d
->state_fd
>= 0))
2938 * OK, this device needs recovery. Try to re-add the previous
2939 * occupant of this slot, if this fails add a new spare
2941 dl
= imsm_readd(super
, i
, a
);
2943 dl
= imsm_add_spare(super
, i
, a
);
2947 /* found a usable disk with enough space */
2948 di
= malloc(sizeof(*di
));
2951 memset(di
, 0, sizeof(*di
));
2953 /* dl->index will be -1 in the case we are activating a
2954 * pristine spare. imsm_process_update() will create a
2955 * new index in this case. Once a disk is found to be
2956 * failed in all member arrays it is kicked from the
2959 di
->disk
.number
= dl
->index
;
2961 /* (ab)use di->devs to store a pointer to the device
2964 di
->devs
= (struct mdinfo
*) dl
;
2966 di
->disk
.raid_disk
= i
;
2967 di
->disk
.major
= dl
->major
;
2968 di
->disk
.minor
= dl
->minor
;
2970 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2971 di
->component_size
= a
->info
.component_size
;
2972 di
->container_member
= inst
;
2976 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2977 i
, di
->data_offset
);
2983 /* No spares found */
2985 /* Now 'rv' has a list of devices to return.
2986 * Create a metadata_update record to update the
2987 * disk_ord_tbl for the array
2989 mu
= malloc(sizeof(*mu
));
2991 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2992 if (mu
->buf
== NULL
) {
2999 struct mdinfo
*n
= rv
->next
;
3008 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
3009 mu
->next
= *updates
;
3010 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
3012 for (di
= rv
; di
; di
= di
->next
) {
3013 u
->type
= update_activate_spare
;
3014 u
->dl
= (struct dl
*) di
->devs
;
3016 u
->slot
= di
->disk
.raid_disk
;
3027 static int disks_overlap(struct imsm_dev
*d1
, struct imsm_dev
*d2
)
3029 struct imsm_map
*m1
= get_imsm_map(d1
, 0);
3030 struct imsm_map
*m2
= get_imsm_map(d2
, 0);
3035 for (i
= 0; i
< m1
->num_members
; i
++) {
3036 idx
= get_imsm_disk_idx(d1
, i
);
3037 for (j
= 0; j
< m2
->num_members
; j
++)
3038 if (idx
== get_imsm_disk_idx(d2
, j
))
3045 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
);
3047 static void imsm_process_update(struct supertype
*st
,
3048 struct metadata_update
*update
)
3051 * crack open the metadata_update envelope to find the update record
3052 * update can be one of:
3053 * update_activate_spare - a spare device has replaced a failed
3054 * device in an array, update the disk_ord_tbl. If this disk is
3055 * present in all member arrays then also clear the SPARE_DISK
3058 struct intel_super
*super
= st
->sb
;
3059 struct imsm_super
*mpb
;
3060 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
3062 /* update requires a larger buf but the allocation failed */
3063 if (super
->next_len
&& !super
->next_buf
) {
3064 super
->next_len
= 0;
3068 if (super
->next_buf
) {
3069 memcpy(super
->next_buf
, super
->buf
, super
->len
);
3071 super
->len
= super
->next_len
;
3072 super
->buf
= super
->next_buf
;
3074 super
->next_len
= 0;
3075 super
->next_buf
= NULL
;
3078 mpb
= super
->anchor
;
3081 case update_activate_spare
: {
3082 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
3083 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
3084 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3085 struct imsm_map
*migr_map
;
3086 struct active_array
*a
;
3087 struct imsm_disk
*disk
;
3093 int victim
= get_imsm_disk_idx(dev
, u
->slot
);
3096 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3101 fprintf(stderr
, "error: imsm_activate_spare passed "
3102 "an unknown disk (index: %d)\n",
3107 super
->updates_pending
++;
3109 /* count failures (excluding rebuilds and the victim)
3110 * to determine map[0] state
3113 for (i
= 0; i
< map
->num_members
; i
++) {
3116 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
3118 __le32_to_cpu(disk
->status
) & FAILED_DISK
)
3122 /* adding a pristine spare, assign a new index */
3123 if (dl
->index
< 0) {
3124 dl
->index
= super
->anchor
->num_disks
;
3125 super
->anchor
->num_disks
++;
3128 status
= __le32_to_cpu(disk
->status
);
3129 status
|= CONFIGURED_DISK
;
3130 status
&= ~SPARE_DISK
;
3131 disk
->status
= __cpu_to_le32(status
);
3134 to_state
= imsm_check_degraded(super
, dev
, failed
);
3135 map
->map_state
= IMSM_T_STATE_DEGRADED
;
3136 migrate(dev
, to_state
, MIGR_REBUILD
);
3137 migr_map
= get_imsm_map(dev
, 1);
3138 set_imsm_ord_tbl_ent(map
, u
->slot
, dl
->index
);
3139 set_imsm_ord_tbl_ent(migr_map
, u
->slot
, dl
->index
| IMSM_ORD_REBUILD
);
3141 /* count arrays using the victim in the metadata */
3143 for (a
= st
->arrays
; a
; a
= a
->next
) {
3144 dev
= get_imsm_dev(super
, a
->info
.container_member
);
3145 for (i
= 0; i
< map
->num_members
; i
++)
3146 if (victim
== get_imsm_disk_idx(dev
, i
))
3150 /* delete the victim if it is no longer being
3156 /* We know that 'manager' isn't touching anything,
3157 * so it is safe to delete
3159 for (dlp
= &super
->disks
; *dlp
; dlp
= &(*dlp
)->next
)
3160 if ((*dlp
)->index
== victim
)
3163 /* victim may be on the missing list */
3165 for (dlp
= &super
->missing
; *dlp
; dlp
= &(*dlp
)->next
)
3166 if ((*dlp
)->index
== victim
)
3168 imsm_delete(super
, dlp
, victim
);
3172 case update_create_array
: {
3173 /* someone wants to create a new array, we need to be aware of
3174 * a few races/collisions:
3175 * 1/ 'Create' called by two separate instances of mdadm
3176 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
3177 * devices that have since been assimilated via
3179 * In the event this update can not be carried out mdadm will
3180 * (FIX ME) notice that its update did not take hold.
3182 struct imsm_update_create_array
*u
= (void *) update
->buf
;
3183 struct imsm_dev
*dev
;
3184 struct imsm_map
*map
, *new_map
;
3185 unsigned long long start
, end
;
3186 unsigned long long new_start
, new_end
;
3190 /* handle racing creates: first come first serve */
3191 if (u
->dev_idx
< mpb
->num_raid_devs
) {
3192 dprintf("%s: subarray %d already defined\n",
3193 __func__
, u
->dev_idx
);
3197 /* check update is next in sequence */
3198 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
3199 dprintf("%s: can not create array %d expected index %d\n",
3200 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
3204 new_map
= get_imsm_map(&u
->dev
, 0);
3205 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
3206 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
3208 /* handle activate_spare versus create race:
3209 * check to make sure that overlapping arrays do not include
3212 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3213 dev
= get_imsm_dev(super
, i
);
3214 map
= get_imsm_map(dev
, 0);
3215 start
= __le32_to_cpu(map
->pba_of_lba0
);
3216 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
3217 if ((new_start
>= start
&& new_start
<= end
) ||
3218 (start
>= new_start
&& start
<= new_end
))
3220 if (overlap
&& disks_overlap(dev
, &u
->dev
)) {
3221 dprintf("%s: arrays overlap\n", __func__
);
3225 /* check num_members sanity */
3226 if (new_map
->num_members
> mpb
->num_disks
) {
3227 dprintf("%s: num_disks out of range\n", __func__
);
3231 /* check that prepare update was successful */
3232 if (!update
->space
) {
3233 dprintf("%s: prepare update failed\n", __func__
);
3237 super
->updates_pending
++;
3238 dev
= update
->space
;
3239 map
= get_imsm_map(dev
, 0);
3240 update
->space
= NULL
;
3241 imsm_copy_dev(dev
, &u
->dev
);
3242 map
= get_imsm_map(dev
, 0);
3243 super
->dev_tbl
[u
->dev_idx
] = dev
;
3244 mpb
->num_raid_devs
++;
3247 for (i
= 0; i
< map
->num_members
; i
++) {
3248 struct imsm_disk
*disk
;
3251 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
3252 status
= __le32_to_cpu(disk
->status
);
3253 status
|= CONFIGURED_DISK
;
3254 status
&= ~SPARE_DISK
;
3255 disk
->status
= __cpu_to_le32(status
);
3259 case update_add_disk
:
3261 /* we may be able to repair some arrays if disks are
3264 struct active_array
*a
;
3266 super
->updates_pending
++;
3267 for (a
= st
->arrays
; a
; a
= a
->next
)
3268 a
->check_degraded
= 1;
3270 /* add some spares to the metadata */
3271 while (super
->add
) {
3275 super
->add
= al
->next
;
3276 al
->next
= super
->disks
;
3278 dprintf("%s: added %x:%x\n",
3279 __func__
, al
->major
, al
->minor
);
3286 static void imsm_prepare_update(struct supertype
*st
,
3287 struct metadata_update
*update
)
3290 * Allocate space to hold new disk entries, raid-device entries or a new
3291 * mpb if necessary. The manager synchronously waits for updates to
3292 * complete in the monitor, so new mpb buffers allocated here can be
3293 * integrated by the monitor thread without worrying about live pointers
3294 * in the manager thread.
3296 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
3297 struct intel_super
*super
= st
->sb
;
3298 struct imsm_super
*mpb
= super
->anchor
;
3303 case update_create_array
: {
3304 struct imsm_update_create_array
*u
= (void *) update
->buf
;
3306 len
= sizeof_imsm_dev(&u
->dev
, 1);
3307 update
->space
= malloc(len
);
3314 /* check if we need a larger metadata buffer */
3315 if (super
->next_buf
)
3316 buf_len
= super
->next_len
;
3318 buf_len
= super
->len
;
3320 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
3321 /* ok we need a larger buf than what is currently allocated
3322 * if this allocation fails process_update will notice that
3323 * ->next_len is set and ->next_buf is NULL
3325 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
3326 if (super
->next_buf
)
3327 free(super
->next_buf
);
3329 super
->next_len
= buf_len
;
3330 if (posix_memalign(&super
->next_buf
, buf_len
, 512) != 0)
3331 super
->next_buf
= NULL
;
3335 /* must be called while manager is quiesced */
3336 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
)
3338 struct imsm_super
*mpb
= super
->anchor
;
3340 struct imsm_dev
*dev
;
3341 struct imsm_map
*map
;
3342 int i
, j
, num_members
;
3345 dprintf("%s: deleting device[%d] from imsm_super\n",
3348 /* shift all indexes down one */
3349 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
3350 if (iter
->index
> index
)
3352 for (iter
= super
->missing
; iter
; iter
= iter
->next
)
3353 if (iter
->index
> index
)
3356 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3357 dev
= get_imsm_dev(super
, i
);
3358 map
= get_imsm_map(dev
, 0);
3359 num_members
= map
->num_members
;
3360 for (j
= 0; j
< num_members
; j
++) {
3361 /* update ord entries being careful not to propagate
3362 * ord-flags to the first map
3364 ord
= get_imsm_ord_tbl_ent(dev
, j
);
3366 if (ord_to_idx(ord
) <= index
)
3369 map
= get_imsm_map(dev
, 0);
3370 set_imsm_ord_tbl_ent(map
, j
, ord_to_idx(ord
- 1));
3371 map
= get_imsm_map(dev
, 1);
3373 set_imsm_ord_tbl_ent(map
, j
, ord
- 1);
3378 super
->updates_pending
++;
3380 struct dl
*dl
= *dlp
;
3382 *dlp
= (*dlp
)->next
;
3383 __free_imsm_disk(dl
);
3386 #endif /* MDASSEMBLE */
3388 struct superswitch super_imsm
= {
3390 .examine_super
= examine_super_imsm
,
3391 .brief_examine_super
= brief_examine_super_imsm
,
3392 .detail_super
= detail_super_imsm
,
3393 .brief_detail_super
= brief_detail_super_imsm
,
3394 .write_init_super
= write_init_super_imsm
,
3395 .validate_geometry
= validate_geometry_imsm
,
3396 .add_to_super
= add_to_super_imsm
,
3398 .match_home
= match_home_imsm
,
3399 .uuid_from_super
= uuid_from_super_imsm
,
3400 .getinfo_super
= getinfo_super_imsm
,
3401 .update_super
= update_super_imsm
,
3403 .avail_size
= avail_size_imsm
,
3405 .compare_super
= compare_super_imsm
,
3407 .load_super
= load_super_imsm
,
3408 .init_super
= init_super_imsm
,
3409 .store_super
= store_zero_imsm
,
3410 .free_super
= free_super_imsm
,
3411 .match_metadata_desc
= match_metadata_desc_imsm
,
3412 .container_content
= container_content_imsm
,
3418 .open_new
= imsm_open_new
,
3419 .load_super
= load_super_imsm
,
3420 .set_array_state
= imsm_set_array_state
,
3421 .set_disk
= imsm_set_disk
,
3422 .sync_metadata
= imsm_sync_metadata
,
3423 .activate_spare
= imsm_activate_spare
,
3424 .process_update
= imsm_process_update
,
3425 .prepare_update
= imsm_prepare_update
,
3426 #endif /* MDASSEMBLE */