2 * mdadm - Intel(R) Matrix Storage Manager Support
4 * Copyright (C) 2002-2007 Intel Corporation
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
26 /* MPB == Metadata Parameter Block */
27 #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
28 #define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
29 #define MPB_VERSION_RAID0 "1.0.00"
30 #define MPB_VERSION_RAID1 "1.1.00"
31 #define MPB_VERSION_RAID5 "1.2.02"
32 #define MAX_SIGNATURE_LENGTH 32
33 #define MAX_RAID_SERIAL_LEN 16
34 #define MPB_SECTOR_CNT 418
35 #define IMSM_RESERVED_SECTORS 4096
37 /* Disk configuration info. */
38 #define IMSM_MAX_DEVICES 255
40 __u8 serial
[MAX_RAID_SERIAL_LEN
];/* 0xD8 - 0xE7 ascii serial number */
41 __u32 total_blocks
; /* 0xE8 - 0xEB total blocks */
42 __u32 scsi_id
; /* 0xEC - 0xEF scsi ID */
43 __u32 status
; /* 0xF0 - 0xF3 */
44 #define SPARE_DISK 0x01 /* Spare */
45 #define CONFIGURED_DISK 0x02 /* Member of some RaidDev */
46 #define FAILED_DISK 0x04 /* Permanent failure */
47 #define USABLE_DISK 0x08 /* Fully usable unless FAILED_DISK is set */
49 #define IMSM_DISK_FILLERS 5
50 __u32 filler
[IMSM_DISK_FILLERS
]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
53 /* RAID map configuration infos. */
55 __u32 pba_of_lba0
; /* start address of partition */
56 __u32 blocks_per_member
;/* blocks per member */
57 __u32 num_data_stripes
; /* number of data stripes */
58 __u16 blocks_per_strip
;
59 __u8 map_state
; /* Normal, Uninitialized, Degraded, Failed */
60 #define IMSM_T_STATE_NORMAL 0
61 #define IMSM_T_STATE_UNINITIALIZED 1
62 #define IMSM_T_STATE_DEGRADED 2 /* FIXME: is this correct? */
63 #define IMSM_T_STATE_FAILED 3 /* FIXME: is this correct? */
65 #define IMSM_T_RAID0 0
66 #define IMSM_T_RAID1 1
67 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
68 __u8 num_members
; /* number of member disks */
70 __u32 filler
[7]; /* expansion area */
71 #define IMSM_ORD_REBUILD (1 << 24)
72 __u32 disk_ord_tbl
[1]; /* disk_ord_tbl[num_members],
73 * top byte contains some flags
75 } __attribute__ ((packed
));
79 __u8 migr_state
; /* Normal or Migrating */
80 __u8 migr_type
; /* Initializing, Rebuilding, ... */
84 struct imsm_map map
[1];
85 /* here comes another one if migr_state */
86 } __attribute__ ((packed
));
89 __u8 volume
[MAX_RAID_SERIAL_LEN
];
92 __u32 status
; /* Persistent RaidDev status */
93 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
94 #define IMSM_DEV_FILLERS 12
95 __u32 filler
[IMSM_DEV_FILLERS
];
97 } __attribute__ ((packed
));
100 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
101 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
102 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
103 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
104 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
105 __u32 error_log_size
; /* 0x30 - 0x33 in bytes */
106 __u32 attributes
; /* 0x34 - 0x37 */
107 __u8 num_disks
; /* 0x38 Number of configured disks */
108 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
109 __u8 error_log_pos
; /* 0x3A */
110 __u8 fill
[1]; /* 0x3B */
111 __u32 cache_size
; /* 0x3c - 0x40 in mb */
112 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
113 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
114 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
115 #define IMSM_FILLERS 35
116 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
117 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
118 /* here comes imsm_dev[num_raid_devs] */
119 /* here comes BBM logs */
120 } __attribute__ ((packed
));
122 #define BBM_LOG_MAX_ENTRIES 254
124 struct bbm_log_entry
{
125 __u64 defective_block_start
;
126 #define UNREADABLE 0xFFFFFFFF
127 __u32 spare_block_offset
;
128 __u16 remapped_marked_count
;
130 } __attribute__ ((__packed__
));
133 __u32 signature
; /* 0xABADB10C */
135 __u32 reserved_spare_block_count
; /* 0 */
136 __u32 reserved
; /* 0xFFFF */
137 __u64 first_spare_lba
;
138 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
139 } __attribute__ ((__packed__
));
143 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
146 static unsigned int sector_count(__u32 bytes
)
148 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
151 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
153 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
156 /* internal representation of IMSM metadata */
159 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
160 struct imsm_super
*anchor
; /* immovable parameters */
162 size_t len
; /* size of the 'buf' allocation */
163 void *next_buf
; /* for realloc'ing buf from the manager */
165 int updates_pending
; /* count of pending updates for mdmon */
166 int creating_imsm
; /* flag to indicate container creation */
167 int current_vol
; /* index of raid device undergoing creation */
168 #define IMSM_MAX_RAID_DEVS 2
169 struct imsm_dev
*dev_tbl
[IMSM_MAX_RAID_DEVS
];
173 __u8 serial
[MAX_RAID_SERIAL_LEN
];
176 struct imsm_disk disk
;
179 struct dl
*add
; /* list of disks to add while mdmon active */
180 struct bbm_log
*bbm_log
;
184 unsigned long long start
, size
;
187 /* definition of messages passed to imsm_process_update */
188 enum imsm_update_type
{
189 update_activate_spare
,
194 struct imsm_update_activate_spare
{
195 enum imsm_update_type type
;
199 struct imsm_update_activate_spare
*next
;
202 struct imsm_update_create_array
{
203 enum imsm_update_type type
;
208 struct imsm_update_add_disk
{
209 enum imsm_update_type type
;
212 static int imsm_env_devname_as_serial(void)
214 char *val
= getenv("IMSM_DEVNAME_AS_SERIAL");
216 if (val
&& atoi(val
) == 1)
223 static struct supertype
*match_metadata_desc_imsm(char *arg
)
225 struct supertype
*st
;
227 if (strcmp(arg
, "imsm") != 0 &&
228 strcmp(arg
, "default") != 0
232 st
= malloc(sizeof(*st
));
233 memset(st
, 0, sizeof(*st
));
234 st
->ss
= &super_imsm
;
235 st
->max_devs
= IMSM_MAX_DEVICES
;
236 st
->minor_version
= 0;
242 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
244 return &mpb
->sig
[MPB_SIG_LEN
];
248 /* retrieve a disk directly from the anchor when the anchor is known to be
249 * up-to-date, currently only at load time
251 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
253 if (index
>= mpb
->num_disks
)
255 return &mpb
->disk
[index
];
259 /* retrieve a disk from the parsed metadata */
260 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
264 for (d
= super
->disks
; d
; d
= d
->next
)
265 if (d
->index
== index
)
272 /* generate a checksum directly from the anchor when the anchor is known to be
273 * up-to-date, currently only at load or write_super after coalescing
275 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
277 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
278 __u32
*p
= (__u32
*) mpb
;
282 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
;
391 static int cmp_extent(const void *av
, const void *bv
)
393 const struct extent
*a
= av
;
394 const struct extent
*b
= bv
;
395 if (a
->start
< b
->start
)
397 if (a
->start
> b
->start
)
402 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
404 /* find a list of used extents on the given physical device */
405 struct extent
*rv
, *e
;
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 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) -
442 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
447 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
451 struct imsm_map
*map
= get_imsm_map(dev
, 0);
455 printf("[%s]:\n", dev
->volume
);
456 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
457 printf(" Members : %d\n", map
->num_members
);
458 for (slot
= 0; slot
< map
->num_members
; slot
++)
459 if (index
== get_imsm_disk_idx(dev
, slot
))
461 if (slot
< map
->num_members
) {
462 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
463 printf(" This Slot : %d%s\n", slot
,
464 ord
& IMSM_ORD_REBUILD
? " (out-of-sync)" : "");
466 printf(" This Slot : ?\n");
467 sz
= __le32_to_cpu(dev
->size_high
);
469 sz
+= __le32_to_cpu(dev
->size_low
);
470 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
471 human_size(sz
* 512));
472 sz
= __le32_to_cpu(map
->blocks_per_member
);
473 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
474 human_size(sz
* 512));
475 printf(" Sector Offset : %u\n",
476 __le32_to_cpu(map
->pba_of_lba0
));
477 printf(" Num Stripes : %u\n",
478 __le32_to_cpu(map
->num_data_stripes
));
479 printf(" Chunk Size : %u KiB\n",
480 __le16_to_cpu(map
->blocks_per_strip
) / 2);
481 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
482 printf(" Migrate State : %s", dev
->vol
.migr_state
? "migrating" : "idle");
483 if (dev
->vol
.migr_state
)
484 printf(": %s", dev
->vol
.migr_type
? "rebuilding" : "initializing");
486 printf(" Map State : %s", map_state_str
[map
->map_state
]);
487 if (dev
->vol
.migr_state
) {
488 struct imsm_map
*map
= get_imsm_map(dev
, 1);
489 printf(" <-- %s", map_state_str
[map
->map_state
]);
492 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
495 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
497 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
498 char str
[MAX_RAID_SERIAL_LEN
+ 1];
506 snprintf(str
, MAX_RAID_SERIAL_LEN
+ 1, "%s", disk
->serial
);
507 printf(" Disk%02d Serial : %s\n", index
, str
);
508 s
= __le32_to_cpu(disk
->status
);
509 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
510 s
&CONFIGURED_DISK
? " active" : "",
511 s
&FAILED_DISK
? " failed" : "",
512 s
&USABLE_DISK
? " usable" : "");
513 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
514 sz
= __le32_to_cpu(disk
->total_blocks
) -
515 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
516 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
517 human_size(sz
* 512));
520 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
522 struct intel_super
*super
= st
->sb
;
523 struct imsm_super
*mpb
= super
->anchor
;
524 char str
[MAX_SIGNATURE_LENGTH
];
528 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
529 printf(" Magic : %s\n", str
);
530 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
531 printf(" Version : %s\n", get_imsm_version(mpb
));
532 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
533 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
534 sum
= __le32_to_cpu(mpb
->check_sum
);
535 printf(" Checksum : %08x %s\n", sum
,
536 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
537 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
538 printf(" Disks : %d\n", mpb
->num_disks
);
539 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
540 print_imsm_disk(mpb
, super
->disks
->index
);
541 if (super
->bbm_log
) {
542 struct bbm_log
*log
= super
->bbm_log
;
545 printf("Bad Block Management Log:\n");
546 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
547 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
548 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
549 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
550 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
552 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
553 print_imsm_dev(__get_imsm_dev(mpb
, i
), super
->disks
->index
);
554 for (i
= 0; i
< mpb
->num_disks
; i
++) {
555 if (i
== super
->disks
->index
)
557 print_imsm_disk(mpb
, i
);
561 static void brief_examine_super_imsm(struct supertype
*st
)
563 printf("ARRAY /dev/imsm metadata=imsm\n");
566 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
568 printf("%s\n", __FUNCTION__
);
571 static void brief_detail_super_imsm(struct supertype
*st
)
573 printf("%s\n", __FUNCTION__
);
577 static int match_home_imsm(struct supertype
*st
, char *homehost
)
579 printf("%s\n", __FUNCTION__
);
584 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
586 /* imsm does not track uuid's so just make sure we never return
587 * the same value twice to break uuid matching in Manage_subdevs
588 * FIXME what about the use of uuid's with bitmap's?
590 static int dummy_id
= 0;
592 uuid
[0] = dummy_id
++;
597 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
599 __u8
*v
= get_imsm_version(mpb
);
600 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
601 char major
[] = { 0, 0, 0 };
602 char minor
[] = { 0 ,0, 0 };
603 char patch
[] = { 0, 0, 0 };
604 char *ver_parse
[] = { major
, minor
, patch
};
608 while (*v
!= '\0' && v
< end
) {
609 if (*v
!= '.' && j
< 2)
610 ver_parse
[i
][j
++] = *v
;
618 *m
= strtol(minor
, NULL
, 0);
619 *p
= strtol(patch
, NULL
, 0);
623 static int imsm_level_to_layout(int level
)
631 return ALGORITHM_LEFT_ASYMMETRIC
;
633 return 0x102; //FIXME is this correct?
638 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
640 struct intel_super
*super
= st
->sb
;
641 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
642 struct imsm_map
*map
= get_imsm_map(dev
, 0);
644 info
->container_member
= super
->current_vol
;
645 info
->array
.raid_disks
= map
->num_members
;
646 info
->array
.level
= get_imsm_raid_level(map
);
647 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
648 info
->array
.md_minor
= -1;
649 info
->array
.ctime
= 0;
650 info
->array
.utime
= 0;
651 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
652 info
->array
.state
= !dev
->vol
.dirty
;
654 info
->disk
.major
= 0;
655 info
->disk
.minor
= 0;
657 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
658 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
659 memset(info
->uuid
, 0, sizeof(info
->uuid
));
661 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
||
662 dev
->vol
.dirty
|| dev
->vol
.migr_state
)
663 info
->resync_start
= 0;
665 info
->resync_start
= ~0ULL;
667 strncpy(info
->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
668 info
->name
[MAX_RAID_SERIAL_LEN
] = 0;
670 info
->array
.major_version
= -1;
671 info
->array
.minor_version
= -2;
672 sprintf(info
->text_version
, "/%s/%d",
673 devnum2devname(st
->container_dev
),
674 info
->container_member
);
675 info
->safe_mode_delay
= 4000; /* 4 secs like the Matrix driver */
679 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
681 struct intel_super
*super
= st
->sb
;
682 struct imsm_disk
*disk
;
685 if (super
->current_vol
>= 0) {
686 getinfo_super_imsm_volume(st
, info
);
690 /* Set raid_disks to zero so that Assemble will always pull in valid
693 info
->array
.raid_disks
= 0;
694 info
->array
.level
= LEVEL_CONTAINER
;
695 info
->array
.layout
= 0;
696 info
->array
.md_minor
= -1;
697 info
->array
.ctime
= 0; /* N/A for imsm */
698 info
->array
.utime
= 0;
699 info
->array
.chunk_size
= 0;
701 info
->disk
.major
= 0;
702 info
->disk
.minor
= 0;
703 info
->disk
.raid_disk
= -1;
704 info
->reshape_active
= 0;
705 info
->array
.major_version
= -1;
706 info
->array
.minor_version
= -2;
707 strcpy(info
->text_version
, "imsm");
708 info
->safe_mode_delay
= 0;
709 info
->disk
.number
= -1;
710 info
->disk
.state
= 0;
713 disk
= &super
->disks
->disk
;
714 info
->disk
.number
= super
->disks
->index
;
715 info
->disk
.raid_disk
= super
->disks
->index
;
716 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
717 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
718 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
719 s
= __le32_to_cpu(disk
->status
);
720 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
721 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
722 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
726 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
727 char *update
, char *devname
, int verbose
,
728 int uuid_set
, char *homehost
)
732 /* For 'assemble' and 'force' we need to return non-zero if any
733 * change was made. For others, the return value is ignored.
734 * Update options are:
735 * force-one : This device looks a bit old but needs to be included,
736 * update age info appropriately.
737 * assemble: clear any 'faulty' flag to allow this device to
739 * force-array: Array is degraded but being forced, mark it clean
740 * if that will be needed to assemble it.
742 * newdev: not used ????
743 * grow: Array has gained a new device - this is currently for
745 * resync: mark as dirty so a resync will happen.
746 * name: update the name - preserving the homehost
748 * Following are not relevant for this imsm:
749 * sparc2.2 : update from old dodgey metadata
750 * super-minor: change the preferred_minor number
751 * summaries: update redundant counters.
752 * uuid: Change the uuid of the array to match watch is given
753 * homehost: update the recorded homehost
754 * _reshape_progress: record new reshape_progress position.
757 //struct intel_super *super = st->sb;
758 //struct imsm_super *mpb = super->mpb;
760 if (strcmp(update
, "grow") == 0) {
762 if (strcmp(update
, "resync") == 0) {
763 /* dev->vol.dirty = 1; */
766 /* IMSM has no concept of UUID or homehost */
771 static size_t disks_to_mpb_size(int disks
)
775 size
= sizeof(struct imsm_super
);
776 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
777 size
+= 2 * sizeof(struct imsm_dev
);
778 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
779 size
+= (4 - 2) * sizeof(struct imsm_map
);
780 /* 4 possible disk_ord_tbl's */
781 size
+= 4 * (disks
- 1) * sizeof(__u32
);
786 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
788 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
791 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
794 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
798 * 0 same, or first was empty, and second was copied
799 * 1 second had wrong number
803 struct intel_super
*first
= st
->sb
;
804 struct intel_super
*sec
= tst
->sb
;
812 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
815 /* if an anchor does not have num_raid_devs set then it is a free
818 if (first
->anchor
->num_raid_devs
> 0 &&
819 sec
->anchor
->num_raid_devs
> 0) {
820 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
824 /* if 'first' is a spare promote it to a populated mpb with sec's
827 if (first
->anchor
->num_raid_devs
== 0 &&
828 sec
->anchor
->num_raid_devs
> 0) {
829 first
->anchor
->num_raid_devs
= sec
->anchor
->num_raid_devs
;
830 first
->anchor
->family_num
= sec
->anchor
->family_num
;
836 static void fd2devname(int fd
, char *name
)
845 if (fstat(fd
, &st
) != 0)
847 sprintf(path
, "/sys/dev/block/%d:%d",
848 major(st
.st_rdev
), minor(st
.st_rdev
));
850 rv
= readlink(path
, dname
, sizeof(dname
));
855 nm
= strrchr(dname
, '/');
857 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
861 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
863 static int imsm_read_serial(int fd
, char *devname
,
864 __u8 serial
[MAX_RAID_SERIAL_LEN
])
866 unsigned char scsi_serial
[255];
872 memset(scsi_serial
, 0, sizeof(scsi_serial
));
874 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
876 if (rv
&& imsm_env_devname_as_serial()) {
877 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
878 fd2devname(fd
, (char *) serial
);
885 Name
": Failed to retrieve serial for %s\n",
890 /* trim whitespace */
891 rsp_len
= scsi_serial
[3];
892 rsp_buf
= (char *) &scsi_serial
[4];
896 if (c
+ MAX_RAID_SERIAL_LEN
> rsp_buf
+ rsp_len
)
897 len
= rsp_len
- (c
- rsp_buf
);
899 len
= MAX_RAID_SERIAL_LEN
;
900 memcpy(serial
, c
, len
);
901 c
= (char *) &serial
[len
- 1];
902 while (isspace(*c
) || *c
== '\0')
908 static int serialcmp(__u8
*s1
, __u8
*s2
)
910 return strncmp((char *) s1
, (char *) s2
, MAX_RAID_SERIAL_LEN
);
913 static void serialcpy(__u8
*dest
, __u8
*src
)
915 strncpy((char *) dest
, (char *) src
, MAX_RAID_SERIAL_LEN
);
919 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
926 __u8 serial
[MAX_RAID_SERIAL_LEN
];
928 rv
= imsm_read_serial(fd
, devname
, serial
);
933 /* check if this is a disk we have seen before. it may be a spare in
934 * super->disks while the current anchor believes it is a raid member,
935 * check if we need to update dl->index
937 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
938 if (serialcmp(dl
->serial
, serial
) == 0)
942 dl
= malloc(sizeof(*dl
));
949 Name
": failed to allocate disk buffer for %s\n",
956 dl
->major
= major(stb
.st_rdev
);
957 dl
->minor
= minor(stb
.st_rdev
);
958 dl
->next
= super
->disks
;
959 dl
->fd
= keep_fd
? fd
: -1;
960 dl
->devname
= devname
? strdup(devname
) : NULL
;
961 serialcpy(dl
->serial
, serial
);
963 } else if (keep_fd
) {
968 /* look up this disk's index in the current anchor */
969 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
970 struct imsm_disk
*disk_iter
;
972 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
974 if (serialcmp(disk_iter
->serial
, dl
->serial
) == 0) {
977 dl
->disk
= *disk_iter
;
978 status
= __le32_to_cpu(dl
->disk
.status
);
979 /* only set index on disks that are a member of a
980 * populated contianer, i.e. one with raid_devs
982 if (status
& FAILED_DISK
)
984 else if (status
& SPARE_DISK
)
999 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
1001 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
1005 /* When migrating map0 contains the 'destination' state while map1
1006 * contains the current state. When not migrating map0 contains the
1007 * current state. This routine assumes that map[0].map_state is set to
1008 * the current array state before being called.
1010 * Migration is indicated by one of the following states
1011 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
1012 * 2/ Initialize (migr_state=1 migr_type=0 map0state=normal
1013 * map1state=unitialized)
1014 * 3/ Verify (Resync) (migr_state=1 migr_type=1 map0state=normal
1016 * 4/ Rebuild (migr_state=1 migr_type=1 map0state=normal
1017 * map1state=degraded)
1019 static void migrate(struct imsm_dev
*dev
, __u8 to_state
, int rebuild_resync
)
1021 struct imsm_map
*dest
;
1022 struct imsm_map
*src
= get_imsm_map(dev
, 0);
1024 dev
->vol
.migr_state
= 1;
1025 dev
->vol
.migr_type
= rebuild_resync
;
1026 dest
= get_imsm_map(dev
, 1);
1028 memcpy(dest
, src
, sizeof_imsm_map(src
));
1029 src
->map_state
= to_state
;
1033 static int parse_raid_devices(struct intel_super
*super
)
1036 struct imsm_dev
*dev_new
;
1037 size_t len
, len_migr
;
1038 size_t space_needed
= 0;
1039 struct imsm_super
*mpb
= super
->anchor
;
1041 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
1042 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
1044 len
= sizeof_imsm_dev(dev_iter
, 0);
1045 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
1047 space_needed
+= len_migr
- len
;
1049 dev_new
= malloc(len_migr
);
1052 imsm_copy_dev(dev_new
, dev_iter
);
1053 super
->dev_tbl
[i
] = dev_new
;
1056 /* ensure that super->buf is large enough when all raid devices
1059 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
1062 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
1063 if (posix_memalign(&buf
, 512, len
) != 0)
1066 memcpy(buf
, super
->buf
, len
);
1075 /* retrieve a pointer to the bbm log which starts after all raid devices */
1076 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
1080 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
1082 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
1088 static void __free_imsm(struct intel_super
*super
, int free_disks
);
1090 /* load_imsm_mpb - read matrix metadata
1091 * allocates super->mpb to be freed by free_super
1093 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
1095 unsigned long long dsize
;
1096 unsigned long long sectors
;
1098 struct imsm_super
*anchor
;
1102 get_dev_size(fd
, NULL
, &dsize
);
1104 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
1107 Name
": Cannot seek to anchor block on %s: %s\n",
1108 devname
, strerror(errno
));
1112 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
1115 Name
": Failed to allocate imsm anchor buffer"
1116 " on %s\n", devname
);
1119 if (read(fd
, anchor
, 512) != 512) {
1122 Name
": Cannot read anchor block on %s: %s\n",
1123 devname
, strerror(errno
));
1128 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1131 Name
": no IMSM anchor on %s\n", devname
);
1136 __free_imsm(super
, 0);
1137 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1138 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1141 Name
": unable to allocate %zu byte mpb buffer\n",
1146 memcpy(super
->buf
, anchor
, 512);
1148 sectors
= mpb_sectors(anchor
) - 1;
1151 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1153 rc
= parse_raid_devices(super
);
1157 /* read the extended mpb */
1158 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1161 Name
": Cannot seek to extended mpb on %s: %s\n",
1162 devname
, strerror(errno
));
1166 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1169 Name
": Cannot read extended mpb on %s: %s\n",
1170 devname
, strerror(errno
));
1174 check_sum
= __gen_imsm_checksum(super
->anchor
);
1175 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1178 Name
": IMSM checksum %x != %x on %s\n",
1179 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1184 /* FIXME the BBM log is disk specific so we cannot use this global
1185 * buffer for all disks. Ok for now since we only look at the global
1186 * bbm_log_size parameter to gate assembly
1188 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1190 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1192 rc
= parse_raid_devices(super
);
1197 static void __free_imsm_disk(struct dl
*d
)
1206 static void free_imsm_disks(struct intel_super
*super
)
1208 while (super
->disks
) {
1209 struct dl
*d
= super
->disks
;
1211 super
->disks
= d
->next
;
1212 __free_imsm_disk(d
);
1216 /* free all the pieces hanging off of a super pointer */
1217 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1226 free_imsm_disks(super
);
1227 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1228 if (super
->dev_tbl
[i
]) {
1229 free(super
->dev_tbl
[i
]);
1230 super
->dev_tbl
[i
] = NULL
;
1234 static void free_imsm(struct intel_super
*super
)
1236 __free_imsm(super
, 1);
1240 static void free_super_imsm(struct supertype
*st
)
1242 struct intel_super
*super
= st
->sb
;
1251 static struct intel_super
*alloc_super(int creating_imsm
)
1253 struct intel_super
*super
= malloc(sizeof(*super
));
1256 memset(super
, 0, sizeof(*super
));
1257 super
->creating_imsm
= creating_imsm
;
1258 super
->current_vol
= -1;
1265 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1266 char *devname
, int keep_fd
)
1269 struct intel_super
*super
;
1270 struct mdinfo
*sd
, *best
= NULL
;
1277 /* check if this disk is a member of an active array */
1278 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1282 if (sra
->array
.major_version
!= -1 ||
1283 sra
->array
.minor_version
!= -2 ||
1284 strcmp(sra
->text_version
, "imsm") != 0)
1287 super
= alloc_super(0);
1291 /* find the most up to date disk in this array, skipping spares */
1292 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1293 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1294 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1299 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1303 if (super
->anchor
->num_raid_devs
== 0)
1306 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1307 if (!best
|| gen
> bestgen
) {
1322 /* load the most up to date anchor */
1323 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1324 dfd
= dev_open(nm
, O_RDONLY
);
1329 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1336 /* re-parse the disk list with the current anchor */
1337 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1338 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1339 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1344 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1349 if (st
->subarray
[0]) {
1350 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1351 super
->current_vol
= atoi(st
->subarray
);
1357 st
->container_dev
= fd2devnum(fd
);
1358 if (st
->ss
== NULL
) {
1359 st
->ss
= &super_imsm
;
1360 st
->minor_version
= 0;
1361 st
->max_devs
= IMSM_MAX_DEVICES
;
1363 st
->loaded_container
= 1;
1369 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1371 struct intel_super
*super
;
1375 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1378 if (st
->subarray
[0])
1379 return 1; /* FIXME */
1381 super
= alloc_super(0);
1384 Name
": malloc of %zu failed.\n",
1389 rv
= load_imsm_mpb(fd
, super
, devname
);
1394 Name
": Failed to load all information "
1395 "sections on %s\n", devname
);
1401 if (st
->ss
== NULL
) {
1402 st
->ss
= &super_imsm
;
1403 st
->minor_version
= 0;
1404 st
->max_devs
= IMSM_MAX_DEVICES
;
1406 st
->loaded_container
= 0;
1411 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1413 if (info
->level
== 1)
1415 return info
->chunk_size
>> 9;
1418 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1422 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1423 if (info
->level
== 1)
1429 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1431 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1434 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1435 unsigned long long size
, char *name
,
1436 char *homehost
, int *uuid
)
1438 /* We are creating a volume inside a pre-existing container.
1439 * so st->sb is already set.
1441 struct intel_super
*super
= st
->sb
;
1442 struct imsm_super
*mpb
= super
->anchor
;
1443 struct imsm_dev
*dev
;
1444 struct imsm_vol
*vol
;
1445 struct imsm_map
*map
;
1446 int idx
= mpb
->num_raid_devs
;
1448 unsigned long long array_blocks
;
1450 size_t size_old
, size_new
;
1452 if (mpb
->num_raid_devs
>= 2) {
1453 fprintf(stderr
, Name
": This imsm-container already has the "
1454 "maximum of 2 volumes\n");
1458 /* ensure the mpb is large enough for the new data */
1459 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1460 size_new
= disks_to_mpb_size(info
->nr_disks
);
1461 if (size_new
> size_old
) {
1463 size_t size_round
= ROUND_UP(size_new
, 512);
1465 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1466 fprintf(stderr
, Name
": could not allocate new mpb\n");
1469 memcpy(mpb_new
, mpb
, size_old
);
1472 super
->anchor
= mpb_new
;
1473 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1474 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1476 super
->current_vol
= idx
;
1477 /* when creating the first raid device in this container set num_disks
1478 * to zero, i.e. delete this spare and add raid member devices in
1479 * add_to_super_imsm_volume()
1481 if (super
->current_vol
== 0)
1483 sprintf(st
->subarray
, "%d", idx
);
1484 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1486 fprintf(stderr
, Name
": could not allocate raid device\n");
1489 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1490 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1491 info
->layout
, info
->chunk_size
,
1493 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1494 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1495 dev
->status
= __cpu_to_le32(0);
1496 dev
->reserved_blocks
= __cpu_to_le32(0);
1498 vol
->migr_state
= 0;
1501 for (i
= 0; i
< idx
; i
++) {
1502 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1503 struct imsm_map
*pmap
= get_imsm_map(prev
, 0);
1505 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1506 offset
+= IMSM_RESERVED_SECTORS
;
1508 map
= get_imsm_map(dev
, 0);
1509 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1510 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1511 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1512 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1513 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1514 IMSM_T_STATE_NORMAL
;
1516 if (info
->level
== 1 && info
->raid_disks
> 2) {
1517 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1518 "in a raid1 volume\n");
1521 if (info
->level
== 10)
1522 map
->raid_level
= 1;
1524 map
->raid_level
= info
->level
;
1526 map
->num_members
= info
->raid_disks
;
1527 for (i
= 0; i
< map
->num_members
; i
++) {
1528 /* initialized in add_to_super */
1529 set_imsm_ord_tbl_ent(map
, i
, 0);
1531 mpb
->num_raid_devs
++;
1532 super
->dev_tbl
[super
->current_vol
] = dev
;
1537 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1538 unsigned long long size
, char *name
,
1539 char *homehost
, int *uuid
)
1541 /* This is primarily called by Create when creating a new array.
1542 * We will then get add_to_super called for each component, and then
1543 * write_init_super called to write it out to each device.
1544 * For IMSM, Create can create on fresh devices or on a pre-existing
1546 * To create on a pre-existing array a different method will be called.
1547 * This one is just for fresh drives.
1549 struct intel_super
*super
;
1550 struct imsm_super
*mpb
;
1558 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1561 super
= alloc_super(1);
1564 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1565 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1570 memset(mpb
, 0, mpb_size
);
1572 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1573 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1574 strlen(MPB_VERSION_RAID5
));
1575 mpb
->mpb_size
= mpb_size
;
1582 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1583 int fd
, char *devname
)
1585 struct intel_super
*super
= st
->sb
;
1586 struct imsm_super
*mpb
= super
->anchor
;
1588 struct imsm_dev
*dev
;
1589 struct imsm_map
*map
;
1592 dev
= get_imsm_dev(super
, super
->current_vol
);
1593 map
= get_imsm_map(dev
, 0);
1595 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1596 if (dl
->major
== dk
->major
&&
1597 dl
->minor
== dk
->minor
)
1600 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1603 /* add a pristine spare to the metadata */
1604 if (dl
->index
< 0) {
1605 dl
->index
= super
->anchor
->num_disks
;
1606 super
->anchor
->num_disks
++;
1608 set_imsm_ord_tbl_ent(map
, dk
->number
, dl
->index
);
1609 status
= CONFIGURED_DISK
| USABLE_DISK
;
1610 dl
->disk
.status
= __cpu_to_le32(status
);
1612 /* if we are creating the first raid device update the family number */
1613 if (super
->current_vol
== 0) {
1615 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
1616 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
1620 sum
= __gen_imsm_checksum(mpb
);
1621 mpb
->family_num
= __cpu_to_le32(sum
);
1625 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1626 int fd
, char *devname
)
1628 struct intel_super
*super
= st
->sb
;
1630 unsigned long long size
;
1635 if (super
->current_vol
>= 0) {
1636 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1641 dd
= malloc(sizeof(*dd
));
1644 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1647 memset(dd
, 0, sizeof(*dd
));
1648 dd
->major
= major(stb
.st_rdev
);
1649 dd
->minor
= minor(stb
.st_rdev
);
1651 dd
->devname
= devname
? strdup(devname
) : NULL
;
1653 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1656 Name
": failed to retrieve scsi serial, aborting\n");
1661 get_dev_size(fd
, NULL
, &size
);
1663 status
= USABLE_DISK
| SPARE_DISK
;
1664 serialcpy(dd
->disk
.serial
, dd
->serial
);
1665 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
1666 dd
->disk
.status
= __cpu_to_le32(status
);
1667 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1668 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
1670 dd
->disk
.scsi_id
= __cpu_to_le32(0);
1672 if (st
->update_tail
) {
1673 dd
->next
= super
->add
;
1676 dd
->next
= super
->disks
;
1681 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1683 /* spare records have their own family number and do not have any defined raid
1686 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
1688 struct imsm_super mpb_save
;
1689 struct imsm_super
*mpb
= super
->anchor
;
1694 mpb
->num_raid_devs
= 0;
1696 mpb
->mpb_size
= sizeof(struct imsm_super
);
1697 mpb
->generation_num
= __cpu_to_le32(1UL);
1699 for (d
= super
->disks
; d
; d
= d
->next
) {
1703 mpb
->disk
[0] = d
->disk
;
1704 sum
= __gen_imsm_checksum(mpb
);
1705 mpb
->family_num
= __cpu_to_le32(sum
);
1706 sum
= __gen_imsm_checksum(mpb
);
1707 mpb
->check_sum
= __cpu_to_le32(sum
);
1709 if (store_imsm_mpb(d
->fd
, super
)) {
1710 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1711 __func__
, d
->major
, d
->minor
, strerror(errno
));
1725 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1727 struct imsm_super
*mpb
= super
->anchor
;
1733 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
1735 /* 'generation' is incremented everytime the metadata is written */
1736 generation
= __le32_to_cpu(mpb
->generation_num
);
1738 mpb
->generation_num
= __cpu_to_le32(generation
);
1740 for (d
= super
->disks
; d
; d
= d
->next
) {
1744 mpb
->disk
[d
->index
] = d
->disk
;
1745 mpb_size
+= sizeof(struct imsm_disk
);
1749 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1750 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1752 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1753 mpb_size
+= sizeof_imsm_dev(dev
, 0);
1755 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
1756 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
1758 /* recalculate checksum */
1759 sum
= __gen_imsm_checksum(mpb
);
1760 mpb
->check_sum
= __cpu_to_le32(sum
);
1762 /* write the mpb for disks that compose raid devices */
1763 for (d
= super
->disks
; d
; d
= d
->next
) {
1766 if (store_imsm_mpb(d
->fd
, super
))
1767 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1768 __func__
, d
->major
, d
->minor
, strerror(errno
));
1776 return write_super_imsm_spares(super
, doclose
);
1782 static int create_array(struct supertype
*st
)
1785 struct imsm_update_create_array
*u
;
1786 struct intel_super
*super
= st
->sb
;
1787 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
1789 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0);
1792 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1797 u
->type
= update_create_array
;
1798 u
->dev_idx
= super
->current_vol
;
1799 imsm_copy_dev(&u
->dev
, dev
);
1800 append_metadata_update(st
, u
, len
);
1805 static int _add_disk(struct supertype
*st
)
1807 struct intel_super
*super
= st
->sb
;
1809 struct imsm_update_add_disk
*u
;
1817 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1822 u
->type
= update_add_disk
;
1823 append_metadata_update(st
, u
, len
);
1828 static int write_init_super_imsm(struct supertype
*st
)
1830 if (st
->update_tail
) {
1831 /* queue the recently created array / added disk
1832 * as a metadata update */
1833 struct intel_super
*super
= st
->sb
;
1837 /* determine if we are creating a volume or adding a disk */
1838 if (super
->current_vol
< 0) {
1839 /* in the add disk case we are running in mdmon
1840 * context, so don't close fd's
1842 return _add_disk(st
);
1844 rv
= create_array(st
);
1846 for (d
= super
->disks
; d
; d
= d
->next
) {
1853 return write_super_imsm(st
->sb
, 1);
1857 static int store_zero_imsm(struct supertype
*st
, int fd
)
1859 unsigned long long dsize
;
1862 get_dev_size(fd
, NULL
, &dsize
);
1864 /* first block is stored on second to last sector of the disk */
1865 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1868 if (posix_memalign(&buf
, 512, 512) != 0)
1871 memset(buf
, 0, 512);
1872 if (write(fd
, buf
, 512) != 512)
1877 static int imsm_bbm_log_size(struct imsm_super
*mpb
)
1879 return __le32_to_cpu(mpb
->bbm_log_size
);
1883 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1884 int layout
, int raiddisks
, int chunk
,
1885 unsigned long long size
, char *dev
,
1886 unsigned long long *freesize
,
1890 unsigned long long ldsize
;
1892 if (level
!= LEVEL_CONTAINER
)
1897 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1900 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1901 dev
, strerror(errno
));
1904 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1910 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1915 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1916 * FIX ME add ahci details
1918 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1919 int layout
, int raiddisks
, int chunk
,
1920 unsigned long long size
, char *dev
,
1921 unsigned long long *freesize
,
1925 struct intel_super
*super
= st
->sb
;
1927 unsigned long long pos
= 0;
1928 unsigned long long maxsize
;
1932 if (level
== LEVEL_CONTAINER
)
1935 if (level
== 1 && raiddisks
> 2) {
1937 fprintf(stderr
, Name
": imsm does not support more "
1938 "than 2 in a raid1 configuration\n");
1942 /* We must have the container info already read in. */
1947 /* General test: make sure there is space for
1948 * 'raiddisks' device extents of size 'size' at a given
1951 unsigned long long minsize
= size
*2 /* convert to blocks */;
1952 unsigned long long start_offset
= ~0ULL;
1955 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1956 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1961 e
= get_extents(super
, dl
);
1964 unsigned long long esize
;
1965 esize
= e
[i
].start
- pos
;
1966 if (esize
>= minsize
)
1968 if (found
&& start_offset
== ~0ULL) {
1971 } else if (found
&& pos
!= start_offset
) {
1975 pos
= e
[i
].start
+ e
[i
].size
;
1977 } while (e
[i
-1].size
);
1982 if (dcnt
< raiddisks
) {
1984 fprintf(stderr
, Name
": imsm: Not enough "
1985 "devices with space for this array "
1992 /* This device must be a member of the set */
1993 if (stat(dev
, &stb
) < 0)
1995 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1997 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1998 if (dl
->major
== major(stb
.st_rdev
) &&
1999 dl
->minor
== minor(stb
.st_rdev
))
2004 fprintf(stderr
, Name
": %s is not in the "
2005 "same imsm set\n", dev
);
2008 e
= get_extents(super
, dl
);
2012 unsigned long long esize
;
2013 esize
= e
[i
].start
- pos
;
2014 if (esize
>= maxsize
)
2016 pos
= e
[i
].start
+ e
[i
].size
;
2018 } while (e
[i
-1].size
);
2019 *freesize
= maxsize
;
2024 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
2025 int raiddisks
, int chunk
, unsigned long long size
,
2026 char *dev
, unsigned long long *freesize
,
2032 /* if given unused devices create a container
2033 * if given given devices in a container create a member volume
2035 if (level
== LEVEL_CONTAINER
) {
2036 /* Must be a fresh device to add to a container */
2037 return validate_geometry_imsm_container(st
, level
, layout
,
2038 raiddisks
, chunk
, size
,
2044 /* creating in a given container */
2045 return validate_geometry_imsm_volume(st
, level
, layout
,
2046 raiddisks
, chunk
, size
,
2047 dev
, freesize
, verbose
);
2050 /* limit creation to the following levels */
2062 /* This device needs to be a device in an 'imsm' container */
2063 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2067 Name
": Cannot create this array on device %s\n",
2072 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
2074 fprintf(stderr
, Name
": Cannot open %s: %s\n",
2075 dev
, strerror(errno
));
2078 /* Well, it is in use by someone, maybe an 'imsm' container. */
2079 cfd
= open_container(fd
);
2083 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
2087 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
2089 if (sra
&& sra
->array
.major_version
== -1 &&
2090 strcmp(sra
->text_version
, "imsm") == 0) {
2091 /* This is a member of a imsm container. Load the container
2092 * and try to create a volume
2094 struct intel_super
*super
;
2096 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
2098 st
->container_dev
= fd2devnum(cfd
);
2100 return validate_geometry_imsm_volume(st
, level
, layout
,
2106 } else /* may belong to another container */
2111 #endif /* MDASSEMBLE */
2113 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
2115 /* Given a container loaded by load_super_imsm_all,
2116 * extract information about all the arrays into
2119 * For each imsm_dev create an mdinfo, fill it in,
2120 * then look for matching devices in super->disks
2121 * and create appropriate device mdinfo.
2123 struct intel_super
*super
= st
->sb
;
2124 struct imsm_super
*mpb
= super
->anchor
;
2125 struct mdinfo
*rest
= NULL
;
2128 /* do not assemble arrays that might have bad blocks */
2129 if (imsm_bbm_log_size(super
->anchor
)) {
2130 fprintf(stderr
, Name
": BBM log found in metadata. "
2131 "Cannot activate array(s).\n");
2135 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2136 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
2137 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2138 struct mdinfo
*this;
2141 this = malloc(sizeof(*this));
2142 memset(this, 0, sizeof(*this));
2145 super
->current_vol
= i
;
2146 getinfo_super_imsm_volume(st
, this);
2147 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
2148 struct mdinfo
*info_d
;
2156 idx
= get_imsm_disk_idx(dev
, slot
);
2157 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
2158 for (d
= super
->disks
; d
; d
= d
->next
)
2159 if (d
->index
== idx
)
2165 s
= d
? __le32_to_cpu(d
->disk
.status
) : 0;
2166 if (s
& FAILED_DISK
)
2168 if (!(s
& USABLE_DISK
))
2170 if (ord
& IMSM_ORD_REBUILD
)
2174 * if we skip some disks the array will be assmebled degraded;
2175 * reset resync start to avoid a dirty-degraded situation
2177 * FIXME handle dirty degraded
2179 if (skip
&& !dev
->vol
.dirty
)
2180 this->resync_start
= ~0ULL;
2184 info_d
= malloc(sizeof(*info_d
));
2186 fprintf(stderr
, Name
": failed to allocate disk"
2187 " for volume %s\n", (char *) dev
->volume
);
2192 memset(info_d
, 0, sizeof(*info_d
));
2193 info_d
->next
= this->devs
;
2194 this->devs
= info_d
;
2196 info_d
->disk
.number
= d
->index
;
2197 info_d
->disk
.major
= d
->major
;
2198 info_d
->disk
.minor
= d
->minor
;
2199 info_d
->disk
.raid_disk
= slot
;
2201 this->array
.working_disks
++;
2203 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
2204 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2205 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2207 strcpy(info_d
->name
, d
->devname
);
2217 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
2220 struct intel_super
*super
= c
->sb
;
2221 struct imsm_super
*mpb
= super
->anchor
;
2223 if (atoi(inst
) >= mpb
->num_raid_devs
) {
2224 fprintf(stderr
, "%s: subarry index %d, out of range\n",
2225 __func__
, atoi(inst
));
2229 dprintf("imsm: open_new %s\n", inst
);
2230 a
->info
.container_member
= atoi(inst
);
2234 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
, int failed
)
2236 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2239 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
2240 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
2242 switch (get_imsm_raid_level(map
)) {
2244 return IMSM_T_STATE_FAILED
;
2247 if (failed
< map
->num_members
)
2248 return IMSM_T_STATE_DEGRADED
;
2250 return IMSM_T_STATE_FAILED
;
2255 * check to see if any mirrors have failed,
2256 * otherwise we are degraded
2258 int device_per_mirror
= 2; /* FIXME is this always the case?
2259 * and are they always adjacent?
2264 for (i
= 0; i
< map
->num_members
; i
++) {
2265 int idx
= get_imsm_disk_idx(dev
, i
);
2266 struct imsm_disk
*disk
= get_imsm_disk(super
, idx
);
2270 else if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2273 if (r10fail
>= device_per_mirror
)
2274 return IMSM_T_STATE_FAILED
;
2276 /* reset 'r10fail' for next mirror set */
2277 if (!((i
+ 1) % device_per_mirror
))
2281 return IMSM_T_STATE_DEGRADED
;
2285 return IMSM_T_STATE_DEGRADED
;
2287 return IMSM_T_STATE_FAILED
;
2293 return map
->map_state
;
2296 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
)
2300 struct imsm_disk
*disk
;
2301 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2303 for (i
= 0; i
< map
->num_members
; i
++) {
2304 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
2305 int idx
= ord_to_idx(ord
);
2307 disk
= get_imsm_disk(super
, idx
);
2309 __le32_to_cpu(disk
->status
) & FAILED_DISK
||
2310 ord
& IMSM_ORD_REBUILD
)
2317 static int is_resyncing(struct imsm_dev
*dev
)
2319 struct imsm_map
*migr_map
;
2321 if (!dev
->vol
.migr_state
)
2324 if (dev
->vol
.migr_type
== 0)
2327 migr_map
= get_imsm_map(dev
, 1);
2329 if (migr_map
->map_state
== IMSM_T_STATE_NORMAL
)
2335 static int is_rebuilding(struct imsm_dev
*dev
)
2337 struct imsm_map
*migr_map
;
2339 if (!dev
->vol
.migr_state
)
2342 if (dev
->vol
.migr_type
== 0)
2345 migr_map
= get_imsm_map(dev
, 1);
2347 if (migr_map
->map_state
== IMSM_T_STATE_DEGRADED
)
2353 /* Handle dirty -> clean transititions and resync. Degraded and rebuild
2354 * states are handled in imsm_set_disk() with one exception, when a
2355 * resync is stopped due to a new failure this routine will set the
2356 * 'degraded' state for the array.
2358 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
2360 int inst
= a
->info
.container_member
;
2361 struct intel_super
*super
= a
->container
->sb
;
2362 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2363 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2364 int failed
= imsm_count_failed(super
, dev
);
2365 __u8 map_state
= imsm_check_degraded(super
, dev
, failed
);
2367 if (consistent
== 2 &&
2368 (a
->resync_start
!= ~0ULL ||
2369 map_state
!= IMSM_T_STATE_NORMAL
||
2370 dev
->vol
.migr_state
))
2373 if (a
->resync_start
== ~0ULL) {
2374 /* complete intialization / resync,
2375 * recovery is completed in ->set_disk
2377 if (is_resyncing(dev
)) {
2378 dprintf("imsm: mark resync done\n");
2379 dev
->vol
.migr_state
= 0;
2380 map
->map_state
= map_state
;
2381 super
->updates_pending
++;
2383 } else if (!is_resyncing(dev
) && !failed
) {
2384 /* mark the start of the init process if nothing is failed */
2385 dprintf("imsm: mark resync start (%llu)\n", a
->resync_start
);
2386 map
->map_state
= map_state
;
2387 migrate(dev
, IMSM_T_STATE_NORMAL
,
2388 map
->map_state
== IMSM_T_STATE_NORMAL
);
2389 super
->updates_pending
++;
2392 /* mark dirty / clean */
2393 if (dev
->vol
.dirty
!= !consistent
) {
2394 dprintf("imsm: mark '%s' (%llu)\n",
2395 consistent
? "clean" : "dirty", a
->resync_start
);
2400 super
->updates_pending
++;
2405 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2407 int inst
= a
->info
.container_member
;
2408 struct intel_super
*super
= a
->container
->sb
;
2409 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2410 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2411 struct imsm_disk
*disk
;
2417 if (n
> map
->num_members
)
2418 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2419 n
, map
->num_members
- 1);
2424 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2426 ord
= get_imsm_ord_tbl_ent(dev
, n
);
2427 disk
= get_imsm_disk(super
, ord_to_idx(ord
));
2429 /* check for new failures */
2430 status
= __le32_to_cpu(disk
->status
);
2431 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2432 status
|= FAILED_DISK
;
2433 disk
->status
= __cpu_to_le32(status
);
2434 disk
->scsi_id
= __cpu_to_le32(~(__u32
)0);
2435 memmove(&disk
->serial
[0], &disk
->serial
[1], MAX_RAID_SERIAL_LEN
- 1);
2436 super
->updates_pending
++;
2438 /* check if in_sync */
2439 if (state
& DS_INSYNC
&& ord
& IMSM_ORD_REBUILD
) {
2440 struct imsm_map
*migr_map
= get_imsm_map(dev
, 1);
2442 set_imsm_ord_tbl_ent(migr_map
, n
, ord_to_idx(ord
));
2443 super
->updates_pending
++;
2446 failed
= imsm_count_failed(super
, dev
);
2447 map_state
= imsm_check_degraded(super
, dev
, failed
);
2449 /* check if recovery complete, newly degraded, or failed */
2450 if (map_state
== IMSM_T_STATE_NORMAL
&& is_rebuilding(dev
)) {
2451 map
->map_state
= map_state
;
2452 dev
->vol
.migr_state
= 0;
2453 super
->updates_pending
++;
2454 } else if (map_state
== IMSM_T_STATE_DEGRADED
&&
2455 map
->map_state
!= map_state
&&
2456 !dev
->vol
.migr_state
) {
2457 dprintf("imsm: mark degraded\n");
2458 map
->map_state
= map_state
;
2459 super
->updates_pending
++;
2460 } else if (map_state
== IMSM_T_STATE_FAILED
&&
2461 map
->map_state
!= map_state
) {
2462 dprintf("imsm: mark failed\n");
2463 dev
->vol
.migr_state
= 0;
2464 map
->map_state
= map_state
;
2465 super
->updates_pending
++;
2469 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2471 struct imsm_super
*mpb
= super
->anchor
;
2472 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2473 unsigned long long dsize
;
2474 unsigned long long sectors
;
2476 get_dev_size(fd
, NULL
, &dsize
);
2478 if (mpb_size
> 512) {
2479 /* -1 to account for anchor */
2480 sectors
= mpb_sectors(mpb
) - 1;
2482 /* write the extended mpb to the sectors preceeding the anchor */
2483 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2486 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2490 /* first block is stored on second to last sector of the disk */
2491 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2494 if (write(fd
, super
->buf
, 512) != 512)
2500 static void imsm_sync_metadata(struct supertype
*container
)
2502 struct intel_super
*super
= container
->sb
;
2504 if (!super
->updates_pending
)
2507 write_super_imsm(super
, 0);
2509 super
->updates_pending
= 0;
2512 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
2514 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2515 int i
= get_imsm_disk_idx(dev
, idx
);
2518 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2522 if (dl
&& __le32_to_cpu(dl
->disk
.status
) & FAILED_DISK
)
2526 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
2531 static struct dl
*imsm_add_spare(struct intel_super
*super
, int slot
, struct active_array
*a
)
2533 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2534 int idx
= get_imsm_disk_idx(dev
, slot
);
2535 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2536 unsigned long long esize
;
2537 unsigned long long pos
;
2546 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2547 /* If in this array, skip */
2548 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2549 if (d
->state_fd
>= 0 &&
2550 d
->disk
.major
== dl
->major
&&
2551 d
->disk
.minor
== dl
->minor
) {
2552 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2558 /* skip in use or failed drives */
2559 status
= __le32_to_cpu(dl
->disk
.status
);
2560 if (status
& FAILED_DISK
|| idx
== dl
->index
) {
2561 dprintf("%x:%x status ( %s%s)\n",
2562 dl
->major
, dl
->minor
,
2563 status
& FAILED_DISK
? "failed " : "",
2564 idx
== dl
->index
? "in use " : "");
2568 /* Does this unused device have the requisite free space?
2569 * We need a->info.component_size sectors
2571 ex
= get_extents(super
, dl
);
2573 dprintf("cannot get extents\n");
2579 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2582 /* check that we can start at pba_of_lba0 with
2583 * a->info.component_size of space
2585 esize
= ex
[j
].start
- pos
;
2586 if (array_start
>= pos
&&
2587 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2591 pos
= ex
[j
].start
+ ex
[j
].size
;
2594 } while (ex
[j
-1].size
);
2598 dprintf("%x:%x does not have %llu at %d\n",
2599 dl
->major
, dl
->minor
,
2600 a
->info
.component_size
,
2601 __le32_to_cpu(map
->pba_of_lba0
));
2611 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2612 struct metadata_update
**updates
)
2615 * Find a device with unused free space and use it to replace a
2616 * failed/vacant region in an array. We replace failed regions one a
2617 * array at a time. The result is that a new spare disk will be added
2618 * to the first failed array and after the monitor has finished
2619 * propagating failures the remainder will be consumed.
2621 * FIXME add a capability for mdmon to request spares from another
2625 struct intel_super
*super
= a
->container
->sb
;
2626 int inst
= a
->info
.container_member
;
2627 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2628 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2629 int failed
= a
->info
.array
.raid_disks
;
2630 struct mdinfo
*rv
= NULL
;
2633 struct metadata_update
*mu
;
2635 struct imsm_update_activate_spare
*u
;
2639 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2640 if ((d
->curr_state
& DS_FAULTY
) &&
2642 /* wait for Removal to happen */
2644 if (d
->state_fd
>= 0)
2648 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2649 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2650 if (imsm_check_degraded(super
, dev
, failed
) != IMSM_T_STATE_DEGRADED
)
2653 /* For each slot, if it is not working, find a spare */
2654 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2655 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2656 if (d
->disk
.raid_disk
== i
)
2658 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2659 if (d
&& (d
->state_fd
>= 0))
2663 * OK, this device needs recovery. Try to re-add the previous
2664 * occupant of this slot, if this fails add a new spare
2666 dl
= imsm_readd(super
, i
, a
);
2668 dl
= imsm_add_spare(super
, i
, a
);
2672 /* found a usable disk with enough space */
2673 di
= malloc(sizeof(*di
));
2674 memset(di
, 0, sizeof(*di
));
2676 /* dl->index will be -1 in the case we are activating a
2677 * pristine spare. imsm_process_update() will create a
2678 * new index in this case. Once a disk is found to be
2679 * failed in all member arrays it is kicked from the
2682 di
->disk
.number
= dl
->index
;
2684 /* (ab)use di->devs to store a pointer to the device
2687 di
->devs
= (struct mdinfo
*) dl
;
2689 di
->disk
.raid_disk
= i
;
2690 di
->disk
.major
= dl
->major
;
2691 di
->disk
.minor
= dl
->minor
;
2693 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2694 di
->component_size
= a
->info
.component_size
;
2695 di
->container_member
= inst
;
2699 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2700 i
, di
->data_offset
);
2706 /* No spares found */
2708 /* Now 'rv' has a list of devices to return.
2709 * Create a metadata_update record to update the
2710 * disk_ord_tbl for the array
2712 mu
= malloc(sizeof(*mu
));
2713 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2715 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2716 mu
->next
= *updates
;
2717 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2719 for (di
= rv
; di
; di
= di
->next
) {
2720 u
->type
= update_activate_spare
;
2721 u
->dl
= (struct dl
*) di
->devs
;
2723 u
->slot
= di
->disk
.raid_disk
;
2734 static int disks_overlap(struct imsm_dev
*d1
, struct imsm_dev
*d2
)
2736 struct imsm_map
*m1
= get_imsm_map(d1
, 0);
2737 struct imsm_map
*m2
= get_imsm_map(d2
, 0);
2742 for (i
= 0; i
< m1
->num_members
; i
++) {
2743 idx
= get_imsm_disk_idx(d1
, i
);
2744 for (j
= 0; j
< m2
->num_members
; j
++)
2745 if (idx
== get_imsm_disk_idx(d2
, j
))
2752 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
);
2754 static void imsm_process_update(struct supertype
*st
,
2755 struct metadata_update
*update
)
2758 * crack open the metadata_update envelope to find the update record
2759 * update can be one of:
2760 * update_activate_spare - a spare device has replaced a failed
2761 * device in an array, update the disk_ord_tbl. If this disk is
2762 * present in all member arrays then also clear the SPARE_DISK
2765 struct intel_super
*super
= st
->sb
;
2766 struct imsm_super
*mpb
;
2767 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2769 /* update requires a larger buf but the allocation failed */
2770 if (super
->next_len
&& !super
->next_buf
) {
2771 super
->next_len
= 0;
2775 if (super
->next_buf
) {
2776 memcpy(super
->next_buf
, super
->buf
, super
->len
);
2778 super
->len
= super
->next_len
;
2779 super
->buf
= super
->next_buf
;
2781 super
->next_len
= 0;
2782 super
->next_buf
= NULL
;
2785 mpb
= super
->anchor
;
2788 case update_activate_spare
: {
2789 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
2790 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
2791 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2792 struct imsm_map
*migr_map
;
2793 struct active_array
*a
;
2794 struct imsm_disk
*disk
;
2800 int victim
= get_imsm_disk_idx(dev
, u
->slot
);
2803 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2808 fprintf(stderr
, "error: imsm_activate_spare passed "
2809 "an unknown disk (index: %d)\n",
2814 super
->updates_pending
++;
2816 /* count failures (excluding rebuilds and the victim)
2817 * to determine map[0] state
2820 for (i
= 0; i
< map
->num_members
; i
++) {
2823 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
2825 __le32_to_cpu(disk
->status
) & FAILED_DISK
)
2829 /* adding a pristine spare, assign a new index */
2830 if (dl
->index
< 0) {
2831 dl
->index
= super
->anchor
->num_disks
;
2832 super
->anchor
->num_disks
++;
2835 status
= __le32_to_cpu(disk
->status
);
2836 status
|= CONFIGURED_DISK
;
2837 status
&= ~SPARE_DISK
;
2838 disk
->status
= __cpu_to_le32(status
);
2841 to_state
= imsm_check_degraded(super
, dev
, failed
);
2842 map
->map_state
= IMSM_T_STATE_DEGRADED
;
2843 migrate(dev
, to_state
, 1);
2844 migr_map
= get_imsm_map(dev
, 1);
2845 set_imsm_ord_tbl_ent(map
, u
->slot
, dl
->index
);
2846 set_imsm_ord_tbl_ent(migr_map
, u
->slot
, dl
->index
| IMSM_ORD_REBUILD
);
2848 /* count arrays using the victim in the metadata */
2850 for (a
= st
->arrays
; a
; a
= a
->next
) {
2851 dev
= get_imsm_dev(super
, a
->info
.container_member
);
2852 for (i
= 0; i
< map
->num_members
; i
++)
2853 if (victim
== get_imsm_disk_idx(dev
, i
))
2857 /* delete the victim if it is no longer being
2863 for (dlp
= &super
->disks
; *dlp
; dlp
= &(*dlp
)->next
)
2864 if ((*dlp
)->index
== victim
)
2866 /* We know that 'manager' isn't touching anything,
2869 imsm_delete(super
, dlp
, victim
);
2873 case update_create_array
: {
2874 /* someone wants to create a new array, we need to be aware of
2875 * a few races/collisions:
2876 * 1/ 'Create' called by two separate instances of mdadm
2877 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
2878 * devices that have since been assimilated via
2880 * In the event this update can not be carried out mdadm will
2881 * (FIX ME) notice that its update did not take hold.
2883 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2884 struct imsm_dev
*dev
;
2885 struct imsm_map
*map
, *new_map
;
2886 unsigned long long start
, end
;
2887 unsigned long long new_start
, new_end
;
2891 /* handle racing creates: first come first serve */
2892 if (u
->dev_idx
< mpb
->num_raid_devs
) {
2893 dprintf("%s: subarray %d already defined\n",
2894 __func__
, u
->dev_idx
);
2898 /* check update is next in sequence */
2899 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
2900 dprintf("%s: can not create array %d expected index %d\n",
2901 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
2905 new_map
= get_imsm_map(&u
->dev
, 0);
2906 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
2907 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
2909 /* handle activate_spare versus create race:
2910 * check to make sure that overlapping arrays do not include
2913 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2914 dev
= get_imsm_dev(super
, i
);
2915 map
= get_imsm_map(dev
, 0);
2916 start
= __le32_to_cpu(map
->pba_of_lba0
);
2917 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
2918 if ((new_start
>= start
&& new_start
<= end
) ||
2919 (start
>= new_start
&& start
<= new_end
))
2921 if (overlap
&& disks_overlap(dev
, &u
->dev
)) {
2922 dprintf("%s: arrays overlap\n", __func__
);
2926 /* check num_members sanity */
2927 if (new_map
->num_members
> mpb
->num_disks
) {
2928 dprintf("%s: num_disks out of range\n", __func__
);
2932 /* check that prepare update was successful */
2933 if (!update
->space
) {
2934 dprintf("%s: prepare update failed\n", __func__
);
2938 super
->updates_pending
++;
2939 dev
= update
->space
;
2940 map
= get_imsm_map(dev
, 0);
2941 update
->space
= NULL
;
2942 imsm_copy_dev(dev
, &u
->dev
);
2943 map
= get_imsm_map(dev
, 0);
2944 super
->dev_tbl
[u
->dev_idx
] = dev
;
2945 mpb
->num_raid_devs
++;
2948 for (i
= 0; i
< map
->num_members
; i
++) {
2949 struct imsm_disk
*disk
;
2952 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
2953 status
= __le32_to_cpu(disk
->status
);
2954 status
|= CONFIGURED_DISK
;
2955 status
&= ~SPARE_DISK
;
2956 disk
->status
= __cpu_to_le32(status
);
2960 case update_add_disk
:
2962 /* we may be able to repair some arrays if disks are
2965 struct active_array
*a
;
2966 for (a
= st
->arrays
; a
; a
= a
->next
)
2967 a
->check_degraded
= 1;
2969 /* add some spares to the metadata */
2970 while (super
->add
) {
2974 super
->add
= al
->next
;
2975 al
->next
= super
->disks
;
2977 dprintf("%s: added %x:%x\n",
2978 __func__
, al
->major
, al
->minor
);
2985 static void imsm_prepare_update(struct supertype
*st
,
2986 struct metadata_update
*update
)
2989 * Allocate space to hold new disk entries, raid-device entries or a new
2990 * mpb if necessary. The manager synchronously waits for updates to
2991 * complete in the monitor, so new mpb buffers allocated here can be
2992 * integrated by the monitor thread without worrying about live pointers
2993 * in the manager thread.
2995 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2996 struct intel_super
*super
= st
->sb
;
2997 struct imsm_super
*mpb
= super
->anchor
;
3002 case update_create_array
: {
3003 struct imsm_update_create_array
*u
= (void *) update
->buf
;
3005 len
= sizeof_imsm_dev(&u
->dev
, 1);
3006 update
->space
= malloc(len
);
3013 /* check if we need a larger metadata buffer */
3014 if (super
->next_buf
)
3015 buf_len
= super
->next_len
;
3017 buf_len
= super
->len
;
3019 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
3020 /* ok we need a larger buf than what is currently allocated
3021 * if this allocation fails process_update will notice that
3022 * ->next_len is set and ->next_buf is NULL
3024 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
3025 if (super
->next_buf
)
3026 free(super
->next_buf
);
3028 super
->next_len
= buf_len
;
3029 if (posix_memalign(&super
->next_buf
, buf_len
, 512) != 0)
3030 super
->next_buf
= NULL
;
3034 /* must be called while manager is quiesced */
3035 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
)
3037 struct imsm_super
*mpb
= super
->anchor
;
3039 struct imsm_dev
*dev
;
3040 struct imsm_map
*map
;
3041 int i
, j
, num_members
;
3044 dprintf("%s: deleting device[%d] from imsm_super\n",
3047 /* shift all indexes down one */
3048 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
3049 if (iter
->index
> index
)
3052 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3053 dev
= get_imsm_dev(super
, i
);
3054 map
= get_imsm_map(dev
, 0);
3055 num_members
= map
->num_members
;
3056 for (j
= 0; j
< num_members
; j
++) {
3057 /* update ord entries being careful not to propagate
3058 * ord-flags to the first map
3060 ord
= get_imsm_ord_tbl_ent(dev
, j
);
3062 if (ord_to_idx(ord
) <= index
)
3065 map
= get_imsm_map(dev
, 0);
3066 set_imsm_ord_tbl_ent(map
, j
, ord_to_idx(ord
- 1));
3067 map
= get_imsm_map(dev
, 1);
3069 set_imsm_ord_tbl_ent(map
, j
, ord
- 1);
3074 super
->updates_pending
++;
3076 struct dl
*dl
= *dlp
;
3078 *dlp
= (*dlp
)->next
;
3079 __free_imsm_disk(dl
);
3082 #endif /* MDASSEMBLE */
3084 struct superswitch super_imsm
= {
3086 .examine_super
= examine_super_imsm
,
3087 .brief_examine_super
= brief_examine_super_imsm
,
3088 .detail_super
= detail_super_imsm
,
3089 .brief_detail_super
= brief_detail_super_imsm
,
3090 .write_init_super
= write_init_super_imsm
,
3091 .validate_geometry
= validate_geometry_imsm
,
3092 .add_to_super
= add_to_super_imsm
,
3094 .match_home
= match_home_imsm
,
3095 .uuid_from_super
= uuid_from_super_imsm
,
3096 .getinfo_super
= getinfo_super_imsm
,
3097 .update_super
= update_super_imsm
,
3099 .avail_size
= avail_size_imsm
,
3101 .compare_super
= compare_super_imsm
,
3103 .load_super
= load_super_imsm
,
3104 .init_super
= init_super_imsm
,
3105 .store_super
= store_zero_imsm
,
3106 .free_super
= free_super_imsm
,
3107 .match_metadata_desc
= match_metadata_desc_imsm
,
3108 .container_content
= container_content_imsm
,
3114 .open_new
= imsm_open_new
,
3115 .load_super
= load_super_imsm
,
3116 .set_array_state
= imsm_set_array_state
,
3117 .set_disk
= imsm_set_disk
,
3118 .sync_metadata
= imsm_sync_metadata
,
3119 .activate_spare
= imsm_activate_spare
,
3120 .process_update
= imsm_process_update
,
3121 .prepare_update
= imsm_prepare_update
,
3122 #endif /* MDASSEMBLE */