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;
241 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
243 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
];
256 /* retrieve a disk from the parsed metadata */
257 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
261 for (d
= super
->disks
; d
; d
= d
->next
)
262 if (d
->index
== index
)
268 /* generate a checksum directly from the anchor when the anchor is known to be
269 * up-to-date, currently only at load or write_super after coalescing
271 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
273 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
274 __u32
*p
= (__u32
*) mpb
;
278 sum
+= __le32_to_cpu(*p
++);
280 return sum
- __le32_to_cpu(mpb
->check_sum
);
283 static size_t sizeof_imsm_map(struct imsm_map
*map
)
285 return sizeof(struct imsm_map
) + sizeof(__u32
) * (map
->num_members
- 1);
288 struct imsm_map
*get_imsm_map(struct imsm_dev
*dev
, int second_map
)
290 struct imsm_map
*map
= &dev
->vol
.map
[0];
292 if (second_map
&& !dev
->vol
.migr_state
)
294 else if (second_map
) {
297 return ptr
+ sizeof_imsm_map(map
);
303 /* return the size of the device.
304 * migr_state increases the returned size if map[0] were to be duplicated
306 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
, int migr_state
)
308 size_t size
= sizeof(*dev
) - sizeof(struct imsm_map
) +
309 sizeof_imsm_map(get_imsm_map(dev
, 0));
311 /* migrating means an additional map */
312 if (dev
->vol
.migr_state
)
313 size
+= sizeof_imsm_map(get_imsm_map(dev
, 1));
315 size
+= sizeof_imsm_map(get_imsm_map(dev
, 0));
320 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
326 if (index
>= mpb
->num_raid_devs
)
329 /* devices start after all disks */
330 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
332 for (i
= 0; i
<= index
; i
++)
334 return _mpb
+ offset
;
336 offset
+= sizeof_imsm_dev(_mpb
+ offset
, 0);
341 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
343 if (index
>= super
->anchor
->num_raid_devs
)
345 return super
->dev_tbl
[index
];
348 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
350 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
352 /* top byte identifies disk under rebuild
353 * why not just use the USABLE bit... oh well.
355 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
358 static __u32
get_imsm_ord_tbl_ent(struct imsm_dev
*dev
, int slot
)
360 struct imsm_map
*map
;
362 if (dev
->vol
.migr_state
)
363 map
= get_imsm_map(dev
, 1);
365 map
= get_imsm_map(dev
, 0);
367 return map
->disk_ord_tbl
[slot
];
370 static int get_imsm_raid_level(struct imsm_map
*map
)
372 if (map
->raid_level
== 1) {
373 if (map
->num_members
== 2)
379 return map
->raid_level
;
382 static int cmp_extent(const void *av
, const void *bv
)
384 const struct extent
*a
= av
;
385 const struct extent
*b
= bv
;
386 if (a
->start
< b
->start
)
388 if (a
->start
> b
->start
)
393 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
395 /* find a list of used extents on the given physical device */
396 struct extent
*rv
, *e
;
400 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
401 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
402 struct imsm_map
*map
= get_imsm_map(dev
, 0);
404 for (j
= 0; j
< map
->num_members
; j
++) {
405 __u32 index
= get_imsm_disk_idx(map
, j
);
407 if (index
== dl
->index
)
411 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
416 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
417 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
418 struct imsm_map
*map
= get_imsm_map(dev
, 0);
420 for (j
= 0; j
< map
->num_members
; j
++) {
421 __u32 index
= get_imsm_disk_idx(map
, j
);
423 if (index
== dl
->index
) {
424 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
425 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
430 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
432 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) -
433 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
439 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
443 struct imsm_map
*map
= get_imsm_map(dev
, 0);
446 printf("[%s]:\n", dev
->volume
);
447 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
448 printf(" Members : %d\n", map
->num_members
);
449 for (slot
= 0; slot
< map
->num_members
; slot
++)
450 if (index
== get_imsm_disk_idx(map
, slot
))
452 if (slot
< map
->num_members
)
453 printf(" This Slot : %d\n", slot
);
455 printf(" This Slot : ?\n");
456 sz
= __le32_to_cpu(dev
->size_high
);
458 sz
+= __le32_to_cpu(dev
->size_low
);
459 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
460 human_size(sz
* 512));
461 sz
= __le32_to_cpu(map
->blocks_per_member
);
462 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
463 human_size(sz
* 512));
464 printf(" Sector Offset : %u\n",
465 __le32_to_cpu(map
->pba_of_lba0
));
466 printf(" Num Stripes : %u\n",
467 __le32_to_cpu(map
->num_data_stripes
));
468 printf(" Chunk Size : %u KiB\n",
469 __le16_to_cpu(map
->blocks_per_strip
) / 2);
470 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
471 printf(" Migrate State : %s", dev
->vol
.migr_state
? "migrating" : "idle");
472 if (dev
->vol
.migr_state
)
473 printf(": %s", dev
->vol
.migr_type
? "rebuilding" : "initializing");
475 printf(" Map State : %s", map_state_str
[map
->map_state
]);
476 if (dev
->vol
.migr_state
) {
477 struct imsm_map
*map
= get_imsm_map(dev
, 1);
478 printf(", %s", map_state_str
[map
->map_state
]);
481 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
484 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
486 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
487 char str
[MAX_RAID_SERIAL_LEN
];
495 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
496 printf(" Disk%02d Serial : %s\n", index
, str
);
497 s
= __le32_to_cpu(disk
->status
);
498 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
499 s
&CONFIGURED_DISK
? " active" : "",
500 s
&FAILED_DISK
? " failed" : "",
501 s
&USABLE_DISK
? " usable" : "");
502 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
503 sz
= __le32_to_cpu(disk
->total_blocks
) -
504 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
505 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
506 human_size(sz
* 512));
509 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
511 struct intel_super
*super
= st
->sb
;
512 struct imsm_super
*mpb
= super
->anchor
;
513 char str
[MAX_SIGNATURE_LENGTH
];
517 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
518 printf(" Magic : %s\n", str
);
519 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
520 printf(" Version : %s\n", get_imsm_version(mpb
));
521 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
522 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
523 sum
= __le32_to_cpu(mpb
->check_sum
);
524 printf(" Checksum : %08x %s\n", sum
,
525 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
526 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
527 printf(" Disks : %d\n", mpb
->num_disks
);
528 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
529 print_imsm_disk(mpb
, super
->disks
->index
);
530 if (super
->bbm_log
) {
531 struct bbm_log
*log
= super
->bbm_log
;
534 printf("Bad Block Management Log:\n");
535 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
536 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
537 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
538 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
539 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
541 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
542 print_imsm_dev(__get_imsm_dev(mpb
, i
), super
->disks
->index
);
543 for (i
= 0; i
< mpb
->num_disks
; i
++) {
544 if (i
== super
->disks
->index
)
546 print_imsm_disk(mpb
, i
);
550 static void brief_examine_super_imsm(struct supertype
*st
)
552 printf("ARRAY /dev/imsm metadata=imsm\n");
555 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
557 printf("%s\n", __FUNCTION__
);
560 static void brief_detail_super_imsm(struct supertype
*st
)
562 printf("%s\n", __FUNCTION__
);
566 static int match_home_imsm(struct supertype
*st
, char *homehost
)
568 printf("%s\n", __FUNCTION__
);
573 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
575 /* imsm does not track uuid's so just make sure we never return
576 * the same value twice to break uuid matching in Manage_subdevs
577 * FIXME what about the use of uuid's with bitmap's?
579 static int dummy_id
= 0;
581 uuid
[0] = dummy_id
++;
586 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
588 __u8
*v
= get_imsm_version(mpb
);
589 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
590 char major
[] = { 0, 0, 0 };
591 char minor
[] = { 0 ,0, 0 };
592 char patch
[] = { 0, 0, 0 };
593 char *ver_parse
[] = { major
, minor
, patch
};
597 while (*v
!= '\0' && v
< end
) {
598 if (*v
!= '.' && j
< 2)
599 ver_parse
[i
][j
++] = *v
;
607 *m
= strtol(minor
, NULL
, 0);
608 *p
= strtol(patch
, NULL
, 0);
612 static int imsm_level_to_layout(int level
)
620 return ALGORITHM_LEFT_ASYMMETRIC
;
622 return 0x102; //FIXME is this correct?
627 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
629 struct intel_super
*super
= st
->sb
;
630 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
631 struct imsm_map
*map
= get_imsm_map(dev
, 0);
633 info
->container_member
= super
->current_vol
;
634 info
->array
.raid_disks
= map
->num_members
;
635 info
->array
.level
= get_imsm_raid_level(map
);
636 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
637 info
->array
.md_minor
= -1;
638 info
->array
.ctime
= 0;
639 info
->array
.utime
= 0;
640 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
642 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
643 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
645 info
->disk
.major
= 0;
646 info
->disk
.minor
= 0;
648 sprintf(info
->text_version
, "/%s/%d",
649 devnum2devname(st
->container_dev
),
650 info
->container_member
);
654 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
656 struct intel_super
*super
= st
->sb
;
657 struct imsm_disk
*disk
;
660 if (super
->current_vol
>= 0) {
661 getinfo_super_imsm_volume(st
, info
);
665 /* Set raid_disks to zero so that Assemble will always pull in valid
668 info
->array
.raid_disks
= 0;
669 info
->array
.level
= LEVEL_CONTAINER
;
670 info
->array
.layout
= 0;
671 info
->array
.md_minor
= -1;
672 info
->array
.ctime
= 0; /* N/A for imsm */
673 info
->array
.utime
= 0;
674 info
->array
.chunk_size
= 0;
676 info
->disk
.major
= 0;
677 info
->disk
.minor
= 0;
678 info
->disk
.raid_disk
= -1;
679 info
->reshape_active
= 0;
680 strcpy(info
->text_version
, "imsm");
681 info
->disk
.number
= -1;
682 info
->disk
.state
= 0;
685 disk
= &super
->disks
->disk
;
686 info
->disk
.number
= super
->disks
->index
;
687 info
->disk
.raid_disk
= super
->disks
->index
;
688 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
689 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
690 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
691 s
= __le32_to_cpu(disk
->status
);
692 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
693 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
694 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
698 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
699 char *update
, char *devname
, int verbose
,
700 int uuid_set
, char *homehost
)
704 /* For 'assemble' and 'force' we need to return non-zero if any
705 * change was made. For others, the return value is ignored.
706 * Update options are:
707 * force-one : This device looks a bit old but needs to be included,
708 * update age info appropriately.
709 * assemble: clear any 'faulty' flag to allow this device to
711 * force-array: Array is degraded but being forced, mark it clean
712 * if that will be needed to assemble it.
714 * newdev: not used ????
715 * grow: Array has gained a new device - this is currently for
717 * resync: mark as dirty so a resync will happen.
718 * name: update the name - preserving the homehost
720 * Following are not relevant for this imsm:
721 * sparc2.2 : update from old dodgey metadata
722 * super-minor: change the preferred_minor number
723 * summaries: update redundant counters.
724 * uuid: Change the uuid of the array to match watch is given
725 * homehost: update the recorded homehost
726 * _reshape_progress: record new reshape_progress position.
729 //struct intel_super *super = st->sb;
730 //struct imsm_super *mpb = super->mpb;
732 if (strcmp(update
, "grow") == 0) {
734 if (strcmp(update
, "resync") == 0) {
735 /* dev->vol.dirty = 1; */
738 /* IMSM has no concept of UUID or homehost */
743 static size_t disks_to_mpb_size(int disks
)
747 size
= sizeof(struct imsm_super
);
748 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
749 size
+= 2 * sizeof(struct imsm_dev
);
750 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
751 size
+= (4 - 2) * sizeof(struct imsm_map
);
752 /* 4 possible disk_ord_tbl's */
753 size
+= 4 * (disks
- 1) * sizeof(__u32
);
758 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
760 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
763 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
766 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
770 * 0 same, or first was empty, and second was copied
771 * 1 second had wrong number
775 struct intel_super
*first
= st
->sb
;
776 struct intel_super
*sec
= tst
->sb
;
784 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
787 /* if an anchor does not have num_raid_devs set then it is a free
790 if (first
->anchor
->num_raid_devs
> 0 &&
791 sec
->anchor
->num_raid_devs
> 0) {
792 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
799 static void fd2devname(int fd
, char *name
)
808 if (fstat(fd
, &st
) != 0)
810 sprintf(path
, "/sys/dev/block/%d:%d",
811 major(st
.st_rdev
), minor(st
.st_rdev
));
813 rv
= readlink(path
, dname
, sizeof(dname
));
818 nm
= strrchr(dname
, '/');
820 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
824 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
826 static int imsm_read_serial(int fd
, char *devname
,
827 __u8 serial
[MAX_RAID_SERIAL_LEN
])
829 unsigned char scsi_serial
[255];
834 memset(scsi_serial
, 0, sizeof(scsi_serial
));
836 if (imsm_env_devname_as_serial()) {
837 char name
[MAX_RAID_SERIAL_LEN
];
839 fd2devname(fd
, name
);
840 strcpy((char *) serial
, name
);
844 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
849 Name
": Failed to retrieve serial for %s\n",
854 rsp_len
= scsi_serial
[3];
855 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
856 if (!isspace(scsi_serial
[4 + i
]))
857 serial
[cnt
++] = scsi_serial
[4 + i
];
858 if (cnt
== MAX_RAID_SERIAL_LEN
)
862 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
868 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
875 __u8 serial
[MAX_RAID_SERIAL_LEN
];
877 rv
= imsm_read_serial(fd
, devname
, serial
);
882 /* check if this is a disk we have seen before. it may be a spare in
883 * super->disks while the current anchor believes it is a raid member,
884 * check if we need to update dl->index
886 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
887 if (memcmp(dl
->serial
, serial
, MAX_RAID_SERIAL_LEN
) == 0)
891 dl
= malloc(sizeof(*dl
));
898 Name
": failed to allocate disk buffer for %s\n",
905 dl
->major
= major(stb
.st_rdev
);
906 dl
->minor
= minor(stb
.st_rdev
);
907 dl
->next
= super
->disks
;
908 dl
->fd
= keep_fd
? fd
: -1;
909 dl
->devname
= devname
? strdup(devname
) : NULL
;
910 strncpy((char *) dl
->serial
, (char *) serial
, MAX_RAID_SERIAL_LEN
);
912 } else if (keep_fd
) {
917 /* look up this disk's index in the current anchor */
918 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
919 struct imsm_disk
*disk_iter
;
921 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
923 if (memcmp(disk_iter
->serial
, dl
->serial
,
924 MAX_RAID_SERIAL_LEN
) == 0) {
927 dl
->disk
= *disk_iter
;
928 status
= __le32_to_cpu(dl
->disk
.status
);
929 /* only set index on disks that are a member of a
930 * populated contianer, i.e. one with raid_devs
932 if (status
& FAILED_DISK
)
934 else if (status
& SPARE_DISK
)
942 if (dl
->index
== -3) {
943 fprintf(stderr
, Name
": device %x:%x with serial %s"
944 " does not belong to this container\n",
945 dl
->major
, dl
->minor
, (char *) serial
);
955 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
957 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
960 static void dup_map(struct imsm_dev
*dev
)
962 struct imsm_map
*dest
= get_imsm_map(dev
, 1);
963 struct imsm_map
*src
= get_imsm_map(dev
, 0);
965 memcpy(dest
, src
, sizeof_imsm_map(src
));
968 static int parse_raid_devices(struct intel_super
*super
)
971 struct imsm_dev
*dev_new
;
972 size_t len
, len_migr
;
973 size_t space_needed
= 0;
974 struct imsm_super
*mpb
= super
->anchor
;
976 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
977 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
979 len
= sizeof_imsm_dev(dev_iter
, 0);
980 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
982 space_needed
+= len_migr
- len
;
984 dev_new
= malloc(len_migr
);
987 imsm_copy_dev(dev_new
, dev_iter
);
988 super
->dev_tbl
[i
] = dev_new
;
991 /* ensure that super->buf is large enough when all raid devices
994 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
997 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
998 if (posix_memalign(&buf
, 512, len
) != 0)
1001 memcpy(buf
, super
->buf
, len
);
1010 /* retrieve a pointer to the bbm log which starts after all raid devices */
1011 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
1015 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
1017 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
1023 static void __free_imsm(struct intel_super
*super
, int free_disks
);
1025 /* load_imsm_mpb - read matrix metadata
1026 * allocates super->mpb to be freed by free_super
1028 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
1030 unsigned long long dsize
;
1031 unsigned long long sectors
;
1033 struct imsm_super
*anchor
;
1037 get_dev_size(fd
, NULL
, &dsize
);
1039 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
1042 Name
": Cannot seek to anchor block on %s: %s\n",
1043 devname
, strerror(errno
));
1047 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
1050 Name
": Failed to allocate imsm anchor buffer"
1051 " on %s\n", devname
);
1054 if (read(fd
, anchor
, 512) != 512) {
1057 Name
": Cannot read anchor block on %s: %s\n",
1058 devname
, strerror(errno
));
1063 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1066 Name
": no IMSM anchor on %s\n", devname
);
1071 __free_imsm(super
, 0);
1072 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1073 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1076 Name
": unable to allocate %zu byte mpb buffer\n",
1081 memcpy(super
->buf
, anchor
, 512);
1083 sectors
= mpb_sectors(anchor
) - 1;
1086 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1088 rc
= parse_raid_devices(super
);
1092 /* read the extended mpb */
1093 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1096 Name
": Cannot seek to extended mpb on %s: %s\n",
1097 devname
, strerror(errno
));
1101 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1104 Name
": Cannot read extended mpb on %s: %s\n",
1105 devname
, strerror(errno
));
1109 check_sum
= __gen_imsm_checksum(super
->anchor
);
1110 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1113 Name
": IMSM checksum %x != %x on %s\n",
1114 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1119 /* FIXME the BBM log is disk specific so we cannot use this global
1120 * buffer for all disks. Ok for now since we only look at the global
1121 * bbm_log_size parameter to gate assembly
1123 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1125 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1127 rc
= parse_raid_devices(super
);
1132 static void __free_imsm_disk(struct dl
*d
)
1141 static void free_imsm_disks(struct intel_super
*super
)
1143 while (super
->disks
) {
1144 struct dl
*d
= super
->disks
;
1146 super
->disks
= d
->next
;
1147 __free_imsm_disk(d
);
1151 /* free all the pieces hanging off of a super pointer */
1152 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1161 free_imsm_disks(super
);
1162 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1163 if (super
->dev_tbl
[i
]) {
1164 free(super
->dev_tbl
[i
]);
1165 super
->dev_tbl
[i
] = NULL
;
1169 static void free_imsm(struct intel_super
*super
)
1171 __free_imsm(super
, 1);
1175 static void free_super_imsm(struct supertype
*st
)
1177 struct intel_super
*super
= st
->sb
;
1186 static struct intel_super
*alloc_super(int creating_imsm
)
1188 struct intel_super
*super
= malloc(sizeof(*super
));
1191 memset(super
, 0, sizeof(*super
));
1192 super
->creating_imsm
= creating_imsm
;
1193 super
->current_vol
= -1;
1200 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1201 char *devname
, int keep_fd
)
1204 struct intel_super
*super
;
1205 struct mdinfo
*sd
, *best
= NULL
;
1212 /* check if this disk is a member of an active array */
1213 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1217 if (sra
->array
.major_version
!= -1 ||
1218 sra
->array
.minor_version
!= -2 ||
1219 strcmp(sra
->text_version
, "imsm") != 0)
1222 super
= alloc_super(0);
1226 /* find the most up to date disk in this array, skipping spares */
1227 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1228 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1229 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1234 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1238 if (super
->anchor
->num_raid_devs
== 0)
1241 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1242 if (!best
|| gen
> bestgen
) {
1257 /* load the most up to date anchor */
1258 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1259 dfd
= dev_open(nm
, O_RDONLY
);
1264 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1271 /* re-parse the disk list with the current anchor */
1272 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1273 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1274 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1279 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1284 if (st
->subarray
[0]) {
1285 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1286 super
->current_vol
= atoi(st
->subarray
);
1292 st
->container_dev
= fd2devnum(fd
);
1293 if (st
->ss
== NULL
) {
1294 st
->ss
= &super_imsm
;
1295 st
->minor_version
= 0;
1296 st
->max_devs
= IMSM_MAX_DEVICES
;
1303 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1305 struct intel_super
*super
;
1309 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1312 if (st
->subarray
[0])
1313 return 1; /* FIXME */
1315 super
= alloc_super(0);
1318 Name
": malloc of %zu failed.\n",
1323 rv
= load_imsm_mpb(fd
, super
, devname
);
1328 Name
": Failed to load all information "
1329 "sections on %s\n", devname
);
1335 if (st
->ss
== NULL
) {
1336 st
->ss
= &super_imsm
;
1337 st
->minor_version
= 0;
1338 st
->max_devs
= IMSM_MAX_DEVICES
;
1344 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1346 if (info
->level
== 1)
1348 return info
->chunk_size
>> 9;
1351 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1355 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1356 if (info
->level
== 1)
1362 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1364 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1367 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1368 unsigned long long size
, char *name
,
1369 char *homehost
, int *uuid
)
1371 /* We are creating a volume inside a pre-existing container.
1372 * so st->sb is already set.
1374 struct intel_super
*super
= st
->sb
;
1375 struct imsm_super
*mpb
= super
->anchor
;
1376 struct imsm_dev
*dev
;
1377 struct imsm_vol
*vol
;
1378 struct imsm_map
*map
;
1379 int idx
= mpb
->num_raid_devs
;
1381 unsigned long long array_blocks
;
1383 size_t size_old
, size_new
;
1385 if (mpb
->num_raid_devs
>= 2) {
1386 fprintf(stderr
, Name
": This imsm-container already has the "
1387 "maximum of 2 volumes\n");
1391 /* ensure the mpb is large enough for the new data */
1392 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1393 size_new
= disks_to_mpb_size(info
->nr_disks
);
1394 if (size_new
> size_old
) {
1396 size_t size_round
= ROUND_UP(size_new
, 512);
1398 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1399 fprintf(stderr
, Name
": could not allocate new mpb\n");
1402 memcpy(mpb_new
, mpb
, size_old
);
1405 super
->anchor
= mpb_new
;
1406 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1407 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1409 super
->current_vol
= idx
;
1410 /* when creating the first raid device in this container set num_disks
1411 * to zero, i.e. delete this spare and add raid member devices in
1412 * add_to_super_imsm_volume()
1414 if (super
->current_vol
== 0)
1416 sprintf(st
->subarray
, "%d", idx
);
1417 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1419 fprintf(stderr
, Name
": could not allocate raid device\n");
1422 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1423 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1424 info
->layout
, info
->chunk_size
,
1426 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1427 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1428 dev
->status
= __cpu_to_le32(0);
1429 dev
->reserved_blocks
= __cpu_to_le32(0);
1431 vol
->migr_state
= 0;
1434 for (i
= 0; i
< idx
; i
++) {
1435 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1436 struct imsm_map
*pmap
= get_imsm_map(prev
, 0);
1438 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1439 offset
+= IMSM_RESERVED_SECTORS
;
1441 map
= get_imsm_map(dev
, 0);
1442 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1443 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1444 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1445 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1446 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1447 IMSM_T_STATE_NORMAL
;
1449 if (info
->level
== 1 && info
->raid_disks
> 2) {
1450 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1451 "in a raid1 volume\n");
1454 if (info
->level
== 10)
1455 map
->raid_level
= 1;
1457 map
->raid_level
= info
->level
;
1459 map
->num_members
= info
->raid_disks
;
1460 for (i
= 0; i
< map
->num_members
; i
++) {
1461 /* initialized in add_to_super */
1462 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1464 mpb
->num_raid_devs
++;
1465 super
->dev_tbl
[super
->current_vol
] = dev
;
1470 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1471 unsigned long long size
, char *name
,
1472 char *homehost
, int *uuid
)
1474 /* This is primarily called by Create when creating a new array.
1475 * We will then get add_to_super called for each component, and then
1476 * write_init_super called to write it out to each device.
1477 * For IMSM, Create can create on fresh devices or on a pre-existing
1479 * To create on a pre-existing array a different method will be called.
1480 * This one is just for fresh drives.
1482 struct intel_super
*super
;
1483 struct imsm_super
*mpb
;
1491 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1494 super
= alloc_super(1);
1497 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1498 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1503 memset(mpb
, 0, mpb_size
);
1505 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1506 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1507 strlen(MPB_VERSION_RAID5
));
1508 mpb
->mpb_size
= mpb_size
;
1514 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1515 int fd
, char *devname
)
1517 struct intel_super
*super
= st
->sb
;
1518 struct imsm_super
*mpb
= super
->anchor
;
1520 struct imsm_dev
*dev
;
1521 struct imsm_map
*map
;
1524 dev
= get_imsm_dev(super
, super
->current_vol
);
1525 map
= get_imsm_map(dev
, 0);
1527 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1528 if (dl
->major
== dk
->major
&&
1529 dl
->minor
== dk
->minor
)
1532 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1535 /* add a pristine spare to the metadata */
1536 if (dl
->index
< 0) {
1537 dl
->index
= super
->anchor
->num_disks
;
1538 super
->anchor
->num_disks
++;
1540 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1541 status
= CONFIGURED_DISK
| USABLE_DISK
;
1542 dl
->disk
.status
= __cpu_to_le32(status
);
1544 /* if we are creating the first raid device update the family number */
1545 if (super
->current_vol
== 0) {
1547 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
1548 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
1552 sum
= __gen_imsm_checksum(mpb
);
1553 mpb
->family_num
= __cpu_to_le32(sum
);
1557 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1558 int fd
, char *devname
)
1560 struct intel_super
*super
= st
->sb
;
1562 unsigned long long size
;
1567 if (super
->current_vol
>= 0) {
1568 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1573 dd
= malloc(sizeof(*dd
));
1576 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1579 memset(dd
, 0, sizeof(*dd
));
1580 dd
->major
= major(stb
.st_rdev
);
1581 dd
->minor
= minor(stb
.st_rdev
);
1583 dd
->devname
= devname
? strdup(devname
) : NULL
;
1585 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1588 Name
": failed to retrieve scsi serial, aborting\n");
1593 get_dev_size(fd
, NULL
, &size
);
1595 status
= USABLE_DISK
| SPARE_DISK
;
1596 strcpy((char *) dd
->disk
.serial
, (char *) dd
->serial
);
1597 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
1598 dd
->disk
.status
= __cpu_to_le32(status
);
1599 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1600 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
1602 dd
->disk
.scsi_id
= __cpu_to_le32(0);
1604 if (st
->update_tail
) {
1605 dd
->next
= super
->add
;
1608 dd
->next
= super
->disks
;
1613 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1615 /* spare records have their own family number and do not have any defined raid
1618 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
1620 struct imsm_super mpb_save
;
1621 struct imsm_super
*mpb
= super
->anchor
;
1626 mpb
->num_raid_devs
= 0;
1628 mpb
->mpb_size
= sizeof(struct imsm_super
);
1629 mpb
->generation_num
= __cpu_to_le32(1UL);
1631 for (d
= super
->disks
; d
; d
= d
->next
) {
1635 mpb
->disk
[0] = d
->disk
;
1636 sum
= __gen_imsm_checksum(mpb
);
1637 mpb
->family_num
= __cpu_to_le32(sum
);
1638 sum
= __gen_imsm_checksum(mpb
);
1639 mpb
->check_sum
= __cpu_to_le32(sum
);
1641 if (store_imsm_mpb(d
->fd
, super
)) {
1642 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1643 __func__
, d
->major
, d
->minor
, strerror(errno
));
1657 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1659 struct imsm_super
*mpb
= super
->anchor
;
1666 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
1668 /* 'generation' is incremented everytime the metadata is written */
1669 generation
= __le32_to_cpu(mpb
->generation_num
);
1671 mpb
->generation_num
= __cpu_to_le32(generation
);
1673 for (d
= super
->disks
; d
; d
= d
->next
) {
1678 mpb
->disk
[d
->index
] = d
->disk
;
1679 mpb_size
+= sizeof(struct imsm_disk
);
1682 if (raid_disks
!= mpb
->num_disks
) {
1683 fprintf(stderr
, "%s: expected %d disks only found %d\n",
1684 __func__
, mpb
->num_disks
, raid_disks
);
1688 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1689 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1691 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1692 mpb_size
+= sizeof_imsm_dev(dev
, 0);
1694 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
1695 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
1697 /* recalculate checksum */
1698 sum
= __gen_imsm_checksum(mpb
);
1699 mpb
->check_sum
= __cpu_to_le32(sum
);
1701 /* write the mpb for disks that compose raid devices */
1702 for (d
= super
->disks
; d
; d
= d
->next
) {
1705 if (store_imsm_mpb(d
->fd
, super
)) {
1706 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1707 __func__
, d
->major
, d
->minor
, strerror(errno
));
1717 return write_super_imsm_spares(super
, doclose
);
1722 static int create_array(struct supertype
*st
)
1725 struct imsm_update_create_array
*u
;
1726 struct intel_super
*super
= st
->sb
;
1727 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
1729 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0);
1732 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1737 u
->type
= update_create_array
;
1738 u
->dev_idx
= super
->current_vol
;
1739 imsm_copy_dev(&u
->dev
, dev
);
1740 append_metadata_update(st
, u
, len
);
1745 static int add_disk(struct supertype
*st
)
1747 struct intel_super
*super
= st
->sb
;
1749 struct imsm_update_add_disk
*u
;
1757 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1762 u
->type
= update_add_disk
;
1763 append_metadata_update(st
, u
, len
);
1768 static int write_init_super_imsm(struct supertype
*st
)
1770 if (st
->update_tail
) {
1771 /* queue the recently created array / added disk
1772 * as a metadata update */
1773 struct intel_super
*super
= st
->sb
;
1777 /* determine if we are creating a volume or adding a disk */
1778 if (super
->current_vol
< 0) {
1779 /* in the add disk case we are running in mdmon
1780 * context, so don't close fd's
1782 return add_disk(st
);
1784 rv
= create_array(st
);
1786 for (d
= super
->disks
; d
; d
= d
->next
) {
1793 return write_super_imsm(st
->sb
, 1);
1796 static int store_zero_imsm(struct supertype
*st
, int fd
)
1798 unsigned long long dsize
;
1801 get_dev_size(fd
, NULL
, &dsize
);
1803 /* first block is stored on second to last sector of the disk */
1804 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1807 if (posix_memalign(&buf
, 512, 512) != 0)
1810 memset(buf
, 0, 512);
1811 if (write(fd
, buf
, 512) != 512)
1816 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1817 int layout
, int raiddisks
, int chunk
,
1818 unsigned long long size
, char *dev
,
1819 unsigned long long *freesize
,
1823 unsigned long long ldsize
;
1825 if (level
!= LEVEL_CONTAINER
)
1830 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1833 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1834 dev
, strerror(errno
));
1837 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1843 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1848 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1849 * FIX ME add ahci details
1851 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1852 int layout
, int raiddisks
, int chunk
,
1853 unsigned long long size
, char *dev
,
1854 unsigned long long *freesize
,
1858 struct intel_super
*super
= st
->sb
;
1860 unsigned long long pos
= 0;
1861 unsigned long long maxsize
;
1865 if (level
== LEVEL_CONTAINER
)
1868 if (level
== 1 && raiddisks
> 2) {
1870 fprintf(stderr
, Name
": imsm does not support more "
1871 "than 2 in a raid1 configuration\n");
1875 /* We must have the container info already read in. */
1880 /* General test: make sure there is space for
1881 * 'raiddisks' device extents of size 'size' at a given
1884 unsigned long long minsize
= size
*2 /* convert to blocks */;
1885 unsigned long long start_offset
= ~0ULL;
1888 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1889 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1894 e
= get_extents(super
, dl
);
1897 unsigned long long esize
;
1898 esize
= e
[i
].start
- pos
;
1899 if (esize
>= minsize
)
1901 if (found
&& start_offset
== ~0ULL) {
1904 } else if (found
&& pos
!= start_offset
) {
1908 pos
= e
[i
].start
+ e
[i
].size
;
1910 } while (e
[i
-1].size
);
1915 if (dcnt
< raiddisks
) {
1917 fprintf(stderr
, Name
": imsm: Not enough "
1918 "devices with space for this array "
1925 /* This device must be a member of the set */
1926 if (stat(dev
, &stb
) < 0)
1928 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1930 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1931 if (dl
->major
== major(stb
.st_rdev
) &&
1932 dl
->minor
== minor(stb
.st_rdev
))
1937 fprintf(stderr
, Name
": %s is not in the "
1938 "same imsm set\n", dev
);
1941 e
= get_extents(super
, dl
);
1945 unsigned long long esize
;
1946 esize
= e
[i
].start
- pos
;
1947 if (esize
>= maxsize
)
1949 pos
= e
[i
].start
+ e
[i
].size
;
1951 } while (e
[i
-1].size
);
1952 *freesize
= maxsize
;
1957 int imsm_bbm_log_size(struct imsm_super
*mpb
)
1959 return __le32_to_cpu(mpb
->bbm_log_size
);
1962 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1963 int raiddisks
, int chunk
, unsigned long long size
,
1964 char *dev
, unsigned long long *freesize
,
1970 /* if given unused devices create a container
1971 * if given given devices in a container create a member volume
1973 if (level
== LEVEL_CONTAINER
) {
1974 /* Must be a fresh device to add to a container */
1975 return validate_geometry_imsm_container(st
, level
, layout
,
1976 raiddisks
, chunk
, size
,
1982 /* creating in a given container */
1983 return validate_geometry_imsm_volume(st
, level
, layout
,
1984 raiddisks
, chunk
, size
,
1985 dev
, freesize
, verbose
);
1988 /* limit creation to the following levels */
2000 /* This device needs to be a device in an 'imsm' container */
2001 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2005 Name
": Cannot create this array on device %s\n",
2010 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
2012 fprintf(stderr
, Name
": Cannot open %s: %s\n",
2013 dev
, strerror(errno
));
2016 /* Well, it is in use by someone, maybe an 'imsm' container. */
2017 cfd
= open_container(fd
);
2021 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
2025 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
2027 if (sra
&& sra
->array
.major_version
== -1 &&
2028 strcmp(sra
->text_version
, "imsm") == 0) {
2029 /* This is a member of a imsm container. Load the container
2030 * and try to create a volume
2032 struct intel_super
*super
;
2034 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
2036 st
->container_dev
= fd2devnum(cfd
);
2038 return validate_geometry_imsm_volume(st
, level
, layout
,
2044 } else /* may belong to another container */
2050 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
2052 /* Given a container loaded by load_super_imsm_all,
2053 * extract information about all the arrays into
2056 * For each imsm_dev create an mdinfo, fill it in,
2057 * then look for matching devices in super->disks
2058 * and create appropriate device mdinfo.
2060 struct intel_super
*super
= st
->sb
;
2061 struct imsm_super
*mpb
= super
->anchor
;
2062 struct mdinfo
*rest
= NULL
;
2065 /* do not assemble arrays that might have bad blocks */
2066 if (imsm_bbm_log_size(super
->anchor
)) {
2067 fprintf(stderr
, Name
": BBM log found in metadata. "
2068 "Cannot activate array(s).\n");
2072 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2073 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
2074 struct imsm_vol
*vol
= &dev
->vol
;
2075 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2076 struct mdinfo
*this;
2079 this = malloc(sizeof(*this));
2080 memset(this, 0, sizeof(*this));
2083 this->array
.level
= get_imsm_raid_level(map
);
2084 this->array
.raid_disks
= map
->num_members
;
2085 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
2086 this->array
.md_minor
= -1;
2087 this->array
.ctime
= 0;
2088 this->array
.utime
= 0;
2089 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
2090 this->array
.state
= !vol
->dirty
;
2091 this->container_member
= i
;
2092 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
||
2093 dev
->vol
.dirty
|| dev
->vol
.migr_state
)
2094 this->resync_start
= 0;
2096 this->resync_start
= ~0ULL;
2098 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
2099 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
2101 sprintf(this->text_version
, "/%s/%d",
2102 devnum2devname(st
->container_dev
),
2103 this->container_member
);
2105 memset(this->uuid
, 0, sizeof(this->uuid
));
2107 this->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2109 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
2110 struct mdinfo
*info_d
;
2118 idx
= get_imsm_disk_idx(map
, slot
);
2119 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
2120 for (d
= super
->disks
; d
; d
= d
->next
)
2121 if (d
->index
== idx
)
2127 s
= d
? __le32_to_cpu(d
->disk
.status
) : 0;
2128 if (s
& FAILED_DISK
)
2130 if (!(s
& USABLE_DISK
))
2132 if (ord
& IMSM_ORD_REBUILD
)
2136 * if we skip some disks the array will be assmebled degraded;
2137 * reset resync start to avoid a dirty-degraded situation
2139 * FIXME handle dirty degraded
2141 if (skip
&& !dev
->vol
.dirty
)
2142 this->resync_start
= ~0ULL;
2146 info_d
= malloc(sizeof(*info_d
));
2148 fprintf(stderr
, Name
": failed to allocate disk"
2149 " for volume %s\n", (char *) dev
->volume
);
2154 memset(info_d
, 0, sizeof(*info_d
));
2155 info_d
->next
= this->devs
;
2156 this->devs
= info_d
;
2158 info_d
->disk
.number
= d
->index
;
2159 info_d
->disk
.major
= d
->major
;
2160 info_d
->disk
.minor
= d
->minor
;
2161 info_d
->disk
.raid_disk
= slot
;
2163 this->array
.working_disks
++;
2165 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
2166 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2167 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2169 strcpy(info_d
->name
, d
->devname
);
2178 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
2181 struct intel_super
*super
= c
->sb
;
2182 struct imsm_super
*mpb
= super
->anchor
;
2184 if (atoi(inst
) >= mpb
->num_raid_devs
) {
2185 fprintf(stderr
, "%s: subarry index %d, out of range\n",
2186 __func__
, atoi(inst
));
2190 dprintf("imsm: open_new %s\n", inst
);
2191 a
->info
.container_member
= atoi(inst
);
2195 static __u8
imsm_check_degraded(struct intel_super
*super
, int n
, int failed
)
2197 struct imsm_dev
*dev
= get_imsm_dev(super
, n
);
2198 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2201 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
2202 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
2204 switch (get_imsm_raid_level(map
)) {
2206 return IMSM_T_STATE_FAILED
;
2209 if (failed
< map
->num_members
)
2210 return IMSM_T_STATE_DEGRADED
;
2212 return IMSM_T_STATE_FAILED
;
2217 * check to see if any mirrors have failed,
2218 * otherwise we are degraded
2220 int device_per_mirror
= 2; /* FIXME is this always the case?
2221 * and are they always adjacent?
2226 for (i
= 0; i
< map
->num_members
; i
++) {
2227 int idx
= get_imsm_disk_idx(map
, i
);
2228 struct imsm_disk
*disk
= get_imsm_disk(super
, idx
);
2230 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2233 if (failed
>= device_per_mirror
)
2234 return IMSM_T_STATE_FAILED
;
2236 /* reset 'failed' for next mirror set */
2237 if (!((i
+ 1) % device_per_mirror
))
2241 return IMSM_T_STATE_DEGRADED
;
2245 return IMSM_T_STATE_DEGRADED
;
2247 return IMSM_T_STATE_FAILED
;
2253 return map
->map_state
;
2256 static int imsm_count_failed(struct intel_super
*super
, struct imsm_map
*map
)
2260 struct imsm_disk
*disk
;
2262 for (i
= 0; i
< map
->num_members
; i
++) {
2263 int idx
= get_imsm_disk_idx(map
, i
);
2265 disk
= get_imsm_disk(super
, idx
);
2266 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2268 else if (!(__le32_to_cpu(disk
->status
) & USABLE_DISK
))
2275 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
2277 int inst
= a
->info
.container_member
;
2278 struct intel_super
*super
= a
->container
->sb
;
2279 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2280 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2281 int dirty
= !consistent
;
2285 failed
= imsm_count_failed(super
, map
);
2286 map_state
= imsm_check_degraded(super
, inst
, failed
);
2288 if (consistent
&& !dev
->vol
.dirty
&&
2289 (dev
->vol
.migr_state
|| map_state
!= IMSM_T_STATE_NORMAL
))
2290 a
->resync_start
= 0ULL;
2291 if (consistent
== 2 && a
->resync_start
!= ~0ULL)
2294 if (a
->resync_start
== ~0ULL) {
2295 /* complete recovery or initial resync */
2296 if (map
->map_state
!= map_state
) {
2297 dprintf("imsm: map_state %d: %d\n",
2299 map
->map_state
= map_state
;
2300 super
->updates_pending
++;
2302 if (dev
->vol
.migr_state
) {
2303 dprintf("imsm: mark resync complete\n");
2304 dev
->vol
.migr_state
= 0;
2305 dev
->vol
.migr_type
= 0;
2306 super
->updates_pending
++;
2308 } else if (!dev
->vol
.migr_state
) {
2309 dprintf("imsm: mark '%s' (%llu)\n",
2310 failed
? "rebuild" : "initializing", a
->resync_start
);
2311 /* mark that we are rebuilding */
2312 map
->map_state
= failed
? map_state
: IMSM_T_STATE_NORMAL
;
2313 dev
->vol
.migr_state
= 1;
2314 dev
->vol
.migr_type
= failed
? 1 : 0;
2316 a
->check_degraded
= 1;
2317 super
->updates_pending
++;
2320 /* mark dirty / clean */
2321 if (dirty
!= dev
->vol
.dirty
) {
2322 dprintf("imsm: mark '%s' (%llu)\n",
2323 dirty
? "dirty" : "clean", a
->resync_start
);
2324 dev
->vol
.dirty
= dirty
;
2325 super
->updates_pending
++;
2330 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2332 int inst
= a
->info
.container_member
;
2333 struct intel_super
*super
= a
->container
->sb
;
2334 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2335 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2336 struct imsm_disk
*disk
;
2339 int new_failure
= 0;
2341 if (n
> map
->num_members
)
2342 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2343 n
, map
->num_members
- 1);
2348 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2350 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, n
));
2352 /* check for new failures */
2353 status
= __le32_to_cpu(disk
->status
);
2354 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2355 status
|= FAILED_DISK
;
2356 disk
->status
= __cpu_to_le32(status
);
2358 super
->updates_pending
++;
2360 /* check if in_sync */
2361 if ((state
& DS_INSYNC
) && !(status
& USABLE_DISK
)) {
2362 status
|= USABLE_DISK
;
2363 disk
->status
= __cpu_to_le32(status
);
2364 super
->updates_pending
++;
2367 /* the number of failures have changed, count up 'failed' to determine
2368 * degraded / failed status
2370 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
2371 failed
= imsm_count_failed(super
, map
);
2373 /* determine map_state based on failed or in_sync count */
2375 map
->map_state
= imsm_check_degraded(super
, inst
, failed
);
2376 else if (map
->map_state
== IMSM_T_STATE_DEGRADED
) {
2380 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2381 if (d
->curr_state
& DS_INSYNC
)
2384 if (working
== a
->info
.array
.raid_disks
) {
2385 map
->map_state
= IMSM_T_STATE_NORMAL
;
2386 dev
->vol
.migr_state
= 0;
2387 dev
->vol
.migr_type
= 0;
2388 super
->updates_pending
++;
2393 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2395 struct imsm_super
*mpb
= super
->anchor
;
2396 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2397 unsigned long long dsize
;
2398 unsigned long long sectors
;
2400 get_dev_size(fd
, NULL
, &dsize
);
2402 if (mpb_size
> 512) {
2403 /* -1 to account for anchor */
2404 sectors
= mpb_sectors(mpb
) - 1;
2406 /* write the extended mpb to the sectors preceeding the anchor */
2407 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2410 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2414 /* first block is stored on second to last sector of the disk */
2415 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2418 if (write(fd
, super
->buf
, 512) != 512)
2424 static void imsm_sync_metadata(struct supertype
*container
)
2426 struct intel_super
*super
= container
->sb
;
2428 if (!super
->updates_pending
)
2431 write_super_imsm(super
, 0);
2433 super
->updates_pending
= 0;
2436 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
2438 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2439 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2440 int i
= get_imsm_disk_idx(map
, idx
);
2443 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2447 if (__le32_to_cpu(dl
->disk
.status
) & FAILED_DISK
)
2451 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
2456 static struct dl
*imsm_add_spare(struct intel_super
*super
, int idx
, struct active_array
*a
)
2458 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2459 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2460 unsigned long long esize
;
2461 unsigned long long pos
;
2470 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2471 /* If in this array, skip */
2472 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2473 if (d
->disk
.major
== dl
->major
&&
2474 d
->disk
.minor
== dl
->minor
) {
2475 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2481 /* skip marked in use or failed drives */
2482 status
= __le32_to_cpu(dl
->disk
.status
);
2483 if (status
& FAILED_DISK
|| status
& CONFIGURED_DISK
) {
2484 dprintf("%x:%x status ( %s%s)\n",
2485 dl
->major
, dl
->minor
,
2486 status
& FAILED_DISK
? "failed " : "",
2487 status
& CONFIGURED_DISK
? "configured " : "");
2491 /* Does this unused device have the requisite free space?
2492 * We need a->info.component_size sectors
2494 ex
= get_extents(super
, dl
);
2496 dprintf("cannot get extents\n");
2502 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2505 /* check that we can start at pba_of_lba0 with
2506 * a->info.component_size of space
2508 esize
= ex
[j
].start
- pos
;
2509 if (array_start
>= pos
&&
2510 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2514 pos
= ex
[j
].start
+ ex
[j
].size
;
2517 } while (ex
[j
-1].size
);
2521 dprintf("%x:%x does not have %llu at %d\n",
2522 dl
->major
, dl
->minor
,
2523 a
->info
.component_size
,
2524 __le32_to_cpu(map
->pba_of_lba0
));
2534 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2535 struct metadata_update
**updates
)
2538 * Find a device with unused free space and use it to replace a
2539 * failed/vacant region in an array. We replace failed regions one a
2540 * array at a time. The result is that a new spare disk will be added
2541 * to the first failed array and after the monitor has finished
2542 * propagating failures the remainder will be consumed.
2544 * FIXME add a capability for mdmon to request spares from another
2548 struct intel_super
*super
= a
->container
->sb
;
2549 int inst
= a
->info
.container_member
;
2550 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2551 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2552 int failed
= a
->info
.array
.raid_disks
;
2553 struct mdinfo
*rv
= NULL
;
2556 struct metadata_update
*mu
;
2558 struct imsm_update_activate_spare
*u
;
2562 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2563 if ((d
->curr_state
& DS_FAULTY
) &&
2565 /* wait for Removal to happen */
2567 if (d
->state_fd
>= 0)
2571 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2572 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2573 if (imsm_check_degraded(super
, inst
, failed
) != IMSM_T_STATE_DEGRADED
)
2576 /* For each slot, if it is not working, find a spare */
2577 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2578 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2579 if (d
->disk
.raid_disk
== i
)
2581 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2582 if (d
&& (d
->state_fd
>= 0))
2586 * OK, this device needs recovery. Try to re-add the previous
2587 * occupant of this slot, if this fails add a new spare
2589 dl
= imsm_readd(super
, i
, a
);
2591 dl
= imsm_add_spare(super
, i
, a
);
2595 /* found a usable disk with enough space */
2596 di
= malloc(sizeof(*di
));
2597 memset(di
, 0, sizeof(*di
));
2599 /* dl->index will be -1 in the case we are activating a
2600 * pristine spare. imsm_process_update() will create a
2601 * new index in this case. Once a disk is found to be
2602 * failed in all member arrays it is kicked from the
2605 di
->disk
.number
= dl
->index
;
2607 /* (ab)use di->devs to store a pointer to the device
2610 di
->devs
= (struct mdinfo
*) dl
;
2612 di
->disk
.raid_disk
= i
;
2613 di
->disk
.major
= dl
->major
;
2614 di
->disk
.minor
= dl
->minor
;
2616 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2617 di
->component_size
= a
->info
.component_size
;
2618 di
->container_member
= inst
;
2622 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2623 i
, di
->data_offset
);
2629 /* No spares found */
2631 /* Now 'rv' has a list of devices to return.
2632 * Create a metadata_update record to update the
2633 * disk_ord_tbl for the array
2635 mu
= malloc(sizeof(*mu
));
2636 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2638 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2639 mu
->next
= *updates
;
2640 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2642 for (di
= rv
; di
; di
= di
->next
) {
2643 u
->type
= update_activate_spare
;
2644 u
->dl
= (struct dl
*) di
->devs
;
2646 u
->slot
= di
->disk
.raid_disk
;
2657 static int disks_overlap(struct imsm_map
*m1
, struct imsm_map
*m2
)
2663 for (i
= 0; i
< m1
->num_members
; i
++) {
2664 idx
= get_imsm_disk_idx(m1
, i
);
2665 for (j
= 0; j
< m2
->num_members
; j
++)
2666 if (idx
== get_imsm_disk_idx(m2
, j
))
2673 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
);
2675 static void imsm_process_update(struct supertype
*st
,
2676 struct metadata_update
*update
)
2679 * crack open the metadata_update envelope to find the update record
2680 * update can be one of:
2681 * update_activate_spare - a spare device has replaced a failed
2682 * device in an array, update the disk_ord_tbl. If this disk is
2683 * present in all member arrays then also clear the SPARE_DISK
2686 struct intel_super
*super
= st
->sb
;
2687 struct imsm_super
*mpb
;
2688 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2690 /* update requires a larger buf but the allocation failed */
2691 if (super
->next_len
&& !super
->next_buf
) {
2692 super
->next_len
= 0;
2696 if (super
->next_buf
) {
2697 memcpy(super
->next_buf
, super
->buf
, super
->len
);
2699 super
->len
= super
->next_len
;
2700 super
->buf
= super
->next_buf
;
2702 super
->next_len
= 0;
2703 super
->next_buf
= NULL
;
2706 mpb
= super
->anchor
;
2709 case update_activate_spare
: {
2710 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
2711 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
2712 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2713 struct active_array
*a
;
2714 struct imsm_disk
*disk
;
2721 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2726 fprintf(stderr
, "error: imsm_activate_spare passed "
2727 "an unknown disk (index: %d serial: %s)\n",
2728 u
->dl
->index
, u
->dl
->serial
);
2732 super
->updates_pending
++;
2734 /* adding a pristine spare, assign a new index */
2735 if (dl
->index
< 0) {
2736 dl
->index
= super
->anchor
->num_disks
;
2737 super
->anchor
->num_disks
++;
2739 victim
= get_imsm_disk_idx(map
, u
->slot
);
2740 map
->disk_ord_tbl
[u
->slot
] = __cpu_to_le32(dl
->index
);
2742 status
= __le32_to_cpu(disk
->status
);
2743 status
|= CONFIGURED_DISK
;
2744 status
&= ~(SPARE_DISK
| USABLE_DISK
);
2745 disk
->status
= __cpu_to_le32(status
);
2747 /* count arrays using the victim in the metadata */
2749 for (a
= st
->arrays
; a
; a
= a
->next
) {
2750 dev
= get_imsm_dev(super
, a
->info
.container_member
);
2751 map
= get_imsm_map(dev
, 0);
2752 for (i
= 0; i
< map
->num_members
; i
++)
2753 if (victim
== get_imsm_disk_idx(map
, i
))
2757 /* clear some flags if the victim is no longer being
2762 for (dlp
= &super
->disks
; *dlp
; )
2763 if ((*dlp
)->index
== victim
)
2765 disk
= &(*dlp
)->disk
;
2766 status
= __le32_to_cpu(disk
->status
);
2767 status
&= ~(CONFIGURED_DISK
| USABLE_DISK
);
2768 disk
->status
= __cpu_to_le32(status
);
2769 /* We know that 'manager' isn't touching anything,
2772 imsm_delete(super
, dlp
);
2776 case update_create_array
: {
2777 /* someone wants to create a new array, we need to be aware of
2778 * a few races/collisions:
2779 * 1/ 'Create' called by two separate instances of mdadm
2780 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
2781 * devices that have since been assimilated via
2783 * In the event this update can not be carried out mdadm will
2784 * (FIX ME) notice that its update did not take hold.
2786 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2787 struct imsm_dev
*dev
;
2788 struct imsm_map
*map
, *new_map
;
2789 unsigned long long start
, end
;
2790 unsigned long long new_start
, new_end
;
2794 /* handle racing creates: first come first serve */
2795 if (u
->dev_idx
< mpb
->num_raid_devs
) {
2796 dprintf("%s: subarray %d already defined\n",
2797 __func__
, u
->dev_idx
);
2801 /* check update is next in sequence */
2802 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
2803 dprintf("%s: can not create array %d expected index %d\n",
2804 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
2808 new_map
= get_imsm_map(&u
->dev
, 0);
2809 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
2810 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
2812 /* handle activate_spare versus create race:
2813 * check to make sure that overlapping arrays do not include
2816 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2817 dev
= get_imsm_dev(super
, i
);
2818 map
= get_imsm_map(dev
, 0);
2819 start
= __le32_to_cpu(map
->pba_of_lba0
);
2820 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
2821 if ((new_start
>= start
&& new_start
<= end
) ||
2822 (start
>= new_start
&& start
<= new_end
))
2824 if (overlap
&& disks_overlap(map
, new_map
)) {
2825 dprintf("%s: arrays overlap\n", __func__
);
2829 /* check num_members sanity */
2830 if (new_map
->num_members
> mpb
->num_disks
) {
2831 dprintf("%s: num_disks out of range\n", __func__
);
2835 /* check that prepare update was successful */
2836 if (!update
->space
) {
2837 dprintf("%s: prepare update failed\n", __func__
);
2841 super
->updates_pending
++;
2842 dev
= update
->space
;
2843 update
->space
= NULL
;
2844 imsm_copy_dev(dev
, &u
->dev
);
2845 super
->dev_tbl
[u
->dev_idx
] = dev
;
2846 mpb
->num_raid_devs
++;
2848 /* fix up flags, if arrays overlap then the drives can not be
2851 for (i
= 0; i
< map
->num_members
; i
++) {
2852 struct imsm_disk
*disk
;
2855 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, i
));
2856 status
= __le32_to_cpu(disk
->status
);
2857 status
|= CONFIGURED_DISK
;
2859 status
&= ~SPARE_DISK
;
2860 disk
->status
= __cpu_to_le32(status
);
2864 case update_add_disk
:
2866 /* we may be able to repair some arrays if disks are
2869 struct active_array
*a
;
2870 for (a
= st
->arrays
; a
; a
= a
->next
)
2871 a
->check_degraded
= 1;
2873 /* check if we can add / replace some disks in the
2875 while (super
->add
) {
2876 struct dl
**dlp
, *dl
, *al
;
2878 super
->add
= al
->next
;
2879 for (dlp
= &super
->disks
; *dlp
; ) {
2880 if (memcmp(al
->serial
, (*dlp
)->serial
,
2881 MAX_RAID_SERIAL_LEN
) == 0) {
2883 *dlp
= (*dlp
)->next
;
2884 __free_imsm_disk(dl
);
2887 dlp
= &(*dlp
)->next
;
2889 al
->next
= super
->disks
;
2897 static void imsm_prepare_update(struct supertype
*st
,
2898 struct metadata_update
*update
)
2901 * Allocate space to hold new disk entries, raid-device entries or a new
2902 * mpb if necessary. The manager synchronously waits for updates to
2903 * complete in the monitor, so new mpb buffers allocated here can be
2904 * integrated by the monitor thread without worrying about live pointers
2905 * in the manager thread.
2907 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2908 struct intel_super
*super
= st
->sb
;
2909 struct imsm_super
*mpb
= super
->anchor
;
2914 case update_create_array
: {
2915 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2917 len
= sizeof_imsm_dev(&u
->dev
, 1);
2918 update
->space
= malloc(len
);
2925 /* check if we need a larger metadata buffer */
2926 if (super
->next_buf
)
2927 buf_len
= super
->next_len
;
2929 buf_len
= super
->len
;
2931 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
2932 /* ok we need a larger buf than what is currently allocated
2933 * if this allocation fails process_update will notice that
2934 * ->next_len is set and ->next_buf is NULL
2936 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
2937 if (super
->next_buf
)
2938 free(super
->next_buf
);
2940 super
->next_len
= buf_len
;
2941 if (posix_memalign(&super
->next_buf
, buf_len
, 512) != 0)
2942 super
->next_buf
= NULL
;
2946 /* must be called while manager is quiesced */
2947 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
)
2949 struct imsm_super
*mpb
= super
->anchor
;
2950 struct dl
*dl
= *dlp
;
2952 struct imsm_dev
*dev
;
2953 struct imsm_map
*map
;
2956 dprintf("%s: deleting device %x:%x from imsm_super\n",
2957 __func__
, dl
->major
, dl
->minor
);
2959 /* shift all indexes down one */
2960 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
2961 if (iter
->index
> dl
->index
)
2964 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2965 dev
= get_imsm_dev(super
, i
);
2966 map
= get_imsm_map(dev
, 0);
2968 for (j
= 0; j
< map
->num_members
; j
++) {
2969 int idx
= get_imsm_disk_idx(map
, j
);
2971 if (idx
> dl
->index
)
2972 map
->disk_ord_tbl
[j
] = __cpu_to_le32(idx
- 1);
2977 super
->updates_pending
++;
2978 *dlp
= (*dlp
)->next
;
2979 __free_imsm_disk(dl
);
2982 struct superswitch super_imsm
= {
2984 .examine_super
= examine_super_imsm
,
2985 .brief_examine_super
= brief_examine_super_imsm
,
2986 .detail_super
= detail_super_imsm
,
2987 .brief_detail_super
= brief_detail_super_imsm
,
2988 .write_init_super
= write_init_super_imsm
,
2990 .match_home
= match_home_imsm
,
2991 .uuid_from_super
= uuid_from_super_imsm
,
2992 .getinfo_super
= getinfo_super_imsm
,
2993 .update_super
= update_super_imsm
,
2995 .avail_size
= avail_size_imsm
,
2997 .compare_super
= compare_super_imsm
,
2999 .load_super
= load_super_imsm
,
3000 .init_super
= init_super_imsm
,
3001 .add_to_super
= add_to_super_imsm
,
3002 .store_super
= store_zero_imsm
,
3003 .free_super
= free_super_imsm
,
3004 .match_metadata_desc
= match_metadata_desc_imsm
,
3005 .container_content
= container_content_imsm
,
3007 .validate_geometry
= validate_geometry_imsm
,
3011 .open_new
= imsm_open_new
,
3012 .load_super
= load_super_imsm
,
3013 .set_array_state
= imsm_set_array_state
,
3014 .set_disk
= imsm_set_disk
,
3015 .sync_metadata
= imsm_sync_metadata
,
3016 .activate_spare
= imsm_activate_spare
,
3017 .process_update
= imsm_process_update
,
3018 .prepare_update
= imsm_prepare_update
,