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 int updates_pending
; /* count of pending updates for mdmon */
164 int creating_imsm
; /* flag to indicate container creation */
165 int current_vol
; /* index of raid device undergoing creation */
166 #define IMSM_MAX_RAID_DEVS 2
167 struct imsm_dev
*dev_tbl
[IMSM_MAX_RAID_DEVS
];
171 __u8 serial
[MAX_RAID_SERIAL_LEN
];
174 struct imsm_disk disk
;
177 struct dl
*add
; /* list of disks to add while mdmon active */
178 struct bbm_log
*bbm_log
;
182 unsigned long long start
, size
;
185 /* definition of messages passed to imsm_process_update */
186 enum imsm_update_type
{
187 update_activate_spare
,
192 struct imsm_update_activate_spare
{
193 enum imsm_update_type type
;
197 struct imsm_update_activate_spare
*next
;
200 struct imsm_update_create_array
{
201 enum imsm_update_type type
;
206 struct imsm_update_add_disk
{
207 enum imsm_update_type type
;
210 static int imsm_env_devname_as_serial(void)
212 char *val
= getenv("IMSM_DEVNAME_AS_SERIAL");
214 if (val
&& atoi(val
) == 1)
221 static struct supertype
*match_metadata_desc_imsm(char *arg
)
223 struct supertype
*st
;
225 if (strcmp(arg
, "imsm") != 0 &&
226 strcmp(arg
, "default") != 0
230 st
= malloc(sizeof(*st
));
231 memset(st
, 0, sizeof(*st
));
232 st
->ss
= &super_imsm
;
233 st
->max_devs
= IMSM_MAX_DEVICES
;
234 st
->minor_version
= 0;
239 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
241 return &mpb
->sig
[MPB_SIG_LEN
];
244 /* retrieve a disk directly from the anchor when the anchor is known to be
245 * up-to-date, currently only at load time
247 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
249 if (index
>= mpb
->num_disks
)
251 return &mpb
->disk
[index
];
254 /* retrieve a disk from the parsed metadata */
255 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
259 for (d
= super
->disks
; d
; d
= d
->next
)
260 if (d
->index
== index
)
266 /* generate a checksum directly from the anchor when the anchor is known to be
267 * up-to-date, currently only at load or write_super after coalescing
269 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
271 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
272 __u32
*p
= (__u32
*) mpb
;
276 sum
+= __le32_to_cpu(*p
++);
278 return sum
- __le32_to_cpu(mpb
->check_sum
);
281 static size_t sizeof_imsm_map(struct imsm_map
*map
)
283 return sizeof(struct imsm_map
) + sizeof(__u32
) * (map
->num_members
- 1);
286 struct imsm_map
*get_imsm_map(struct imsm_dev
*dev
, int second_map
)
288 struct imsm_map
*map
= &dev
->vol
.map
[0];
290 if (second_map
&& !dev
->vol
.migr_state
)
292 else if (second_map
) {
295 return ptr
+ sizeof_imsm_map(map
);
301 /* return the size of the device.
302 * migr_state increases the returned size if map[0] were to be duplicated
304 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
, int migr_state
)
306 size_t size
= sizeof(*dev
) - sizeof(struct imsm_map
) +
307 sizeof_imsm_map(get_imsm_map(dev
, 0));
309 /* migrating means an additional map */
310 if (dev
->vol
.migr_state
)
311 size
+= sizeof_imsm_map(get_imsm_map(dev
, 1));
313 size
+= sizeof_imsm_map(get_imsm_map(dev
, 0));
318 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
324 if (index
>= mpb
->num_raid_devs
)
327 /* devices start after all disks */
328 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
330 for (i
= 0; i
<= index
; i
++)
332 return _mpb
+ offset
;
334 offset
+= sizeof_imsm_dev(_mpb
+ offset
, 0);
339 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
341 if (index
>= super
->anchor
->num_raid_devs
)
343 return super
->dev_tbl
[index
];
346 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
348 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
350 /* top byte identifies disk under rebuild
351 * why not just use the USABLE bit... oh well.
353 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
356 static __u32
get_imsm_ord_tbl_ent(struct imsm_dev
*dev
, int slot
)
358 struct imsm_map
*map
;
360 if (dev
->vol
.migr_state
)
361 map
= get_imsm_map(dev
, 1);
363 map
= get_imsm_map(dev
, 0);
365 return map
->disk_ord_tbl
[slot
];
368 static int get_imsm_raid_level(struct imsm_map
*map
)
370 if (map
->raid_level
== 1) {
371 if (map
->num_members
== 2)
377 return map
->raid_level
;
380 static int cmp_extent(const void *av
, const void *bv
)
382 const struct extent
*a
= av
;
383 const struct extent
*b
= bv
;
384 if (a
->start
< b
->start
)
386 if (a
->start
> b
->start
)
391 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
393 /* find a list of used extents on the given physical device */
394 struct extent
*rv
, *e
;
398 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
399 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
400 struct imsm_map
*map
= get_imsm_map(dev
, 0);
402 for (j
= 0; j
< map
->num_members
; j
++) {
403 __u32 index
= get_imsm_disk_idx(map
, j
);
405 if (index
== dl
->index
)
409 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
414 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
415 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
416 struct imsm_map
*map
= get_imsm_map(dev
, 0);
418 for (j
= 0; j
< map
->num_members
; j
++) {
419 __u32 index
= get_imsm_disk_idx(map
, j
);
421 if (index
== dl
->index
) {
422 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
423 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
428 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
430 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) -
431 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
437 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
441 struct imsm_map
*map
= get_imsm_map(dev
, 0);
444 printf("[%s]:\n", dev
->volume
);
445 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
446 printf(" Members : %d\n", map
->num_members
);
447 for (slot
= 0; slot
< map
->num_members
; slot
++)
448 if (index
== get_imsm_disk_idx(map
, slot
))
450 if (slot
< map
->num_members
)
451 printf(" This Slot : %d\n", slot
);
453 printf(" This Slot : ?\n");
454 sz
= __le32_to_cpu(dev
->size_high
);
456 sz
+= __le32_to_cpu(dev
->size_low
);
457 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
458 human_size(sz
* 512));
459 sz
= __le32_to_cpu(map
->blocks_per_member
);
460 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
461 human_size(sz
* 512));
462 printf(" Sector Offset : %u\n",
463 __le32_to_cpu(map
->pba_of_lba0
));
464 printf(" Num Stripes : %u\n",
465 __le32_to_cpu(map
->num_data_stripes
));
466 printf(" Chunk Size : %u KiB\n",
467 __le16_to_cpu(map
->blocks_per_strip
) / 2);
468 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
469 printf(" Migrate State : %s", dev
->vol
.migr_state
? "migrating" : "idle");
470 if (dev
->vol
.migr_state
)
471 printf(": %s", dev
->vol
.migr_type
? "rebuilding" : "initializing");
473 printf(" Map State : %s", map_state_str
[map
->map_state
]);
474 if (dev
->vol
.migr_state
) {
475 struct imsm_map
*map
= get_imsm_map(dev
, 1);
476 printf(", %s", map_state_str
[map
->map_state
]);
479 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
482 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
484 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
485 char str
[MAX_RAID_SERIAL_LEN
];
493 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
494 printf(" Disk%02d Serial : %s\n", index
, str
);
495 s
= __le32_to_cpu(disk
->status
);
496 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
497 s
&CONFIGURED_DISK
? " active" : "",
498 s
&FAILED_DISK
? " failed" : "",
499 s
&USABLE_DISK
? " usable" : "");
500 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
501 sz
= __le32_to_cpu(disk
->total_blocks
) -
502 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
503 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
504 human_size(sz
* 512));
507 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
509 struct intel_super
*super
= st
->sb
;
510 struct imsm_super
*mpb
= super
->anchor
;
511 char str
[MAX_SIGNATURE_LENGTH
];
515 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
516 printf(" Magic : %s\n", str
);
517 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
518 printf(" Version : %s\n", get_imsm_version(mpb
));
519 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
520 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
521 sum
= __le32_to_cpu(mpb
->check_sum
);
522 printf(" Checksum : %08x %s\n", sum
,
523 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
524 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
525 printf(" Disks : %d\n", mpb
->num_disks
);
526 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
527 print_imsm_disk(mpb
, super
->disks
->index
);
528 if (super
->bbm_log
) {
529 struct bbm_log
*log
= super
->bbm_log
;
532 printf("Bad Block Management Log:\n");
533 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
534 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
535 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
536 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
537 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
539 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
540 print_imsm_dev(__get_imsm_dev(mpb
, i
), super
->disks
->index
);
541 for (i
= 0; i
< mpb
->num_disks
; i
++) {
542 if (i
== super
->disks
->index
)
544 print_imsm_disk(mpb
, i
);
548 static void brief_examine_super_imsm(struct supertype
*st
)
550 printf("ARRAY /dev/imsm metadata=imsm\n");
553 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
555 printf("%s\n", __FUNCTION__
);
558 static void brief_detail_super_imsm(struct supertype
*st
)
560 printf("%s\n", __FUNCTION__
);
564 static int match_home_imsm(struct supertype
*st
, char *homehost
)
566 printf("%s\n", __FUNCTION__
);
571 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
573 /* imsm does not track uuid's so just make sure we never return
574 * the same value twice to break uuid matching in Manage_subdevs
575 * FIXME what about the use of uuid's with bitmap's?
577 static int dummy_id
= 0;
579 uuid
[0] = dummy_id
++;
584 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
586 __u8
*v
= get_imsm_version(mpb
);
587 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
588 char major
[] = { 0, 0, 0 };
589 char minor
[] = { 0 ,0, 0 };
590 char patch
[] = { 0, 0, 0 };
591 char *ver_parse
[] = { major
, minor
, patch
};
595 while (*v
!= '\0' && v
< end
) {
596 if (*v
!= '.' && j
< 2)
597 ver_parse
[i
][j
++] = *v
;
605 *m
= strtol(minor
, NULL
, 0);
606 *p
= strtol(patch
, NULL
, 0);
610 static int imsm_level_to_layout(int level
)
618 return ALGORITHM_LEFT_ASYMMETRIC
;
620 return 0x102; //FIXME is this correct?
625 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
627 struct intel_super
*super
= st
->sb
;
628 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
629 struct imsm_map
*map
= get_imsm_map(dev
, 0);
631 info
->container_member
= super
->current_vol
;
632 info
->array
.raid_disks
= map
->num_members
;
633 info
->array
.level
= get_imsm_raid_level(map
);
634 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
635 info
->array
.md_minor
= -1;
636 info
->array
.ctime
= 0;
637 info
->array
.utime
= 0;
638 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
640 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
641 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
643 info
->disk
.major
= 0;
644 info
->disk
.minor
= 0;
646 sprintf(info
->text_version
, "/%s/%d",
647 devnum2devname(st
->container_dev
),
648 info
->container_member
);
652 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
654 struct intel_super
*super
= st
->sb
;
655 struct imsm_disk
*disk
;
658 if (super
->current_vol
>= 0) {
659 getinfo_super_imsm_volume(st
, info
);
663 /* Set raid_disks to zero so that Assemble will always pull in valid
666 info
->array
.raid_disks
= 0;
667 info
->array
.level
= LEVEL_CONTAINER
;
668 info
->array
.layout
= 0;
669 info
->array
.md_minor
= -1;
670 info
->array
.ctime
= 0; /* N/A for imsm */
671 info
->array
.utime
= 0;
672 info
->array
.chunk_size
= 0;
674 info
->disk
.major
= 0;
675 info
->disk
.minor
= 0;
676 info
->disk
.raid_disk
= -1;
677 info
->reshape_active
= 0;
678 strcpy(info
->text_version
, "imsm");
679 info
->disk
.number
= -1;
680 info
->disk
.state
= 0;
683 disk
= &super
->disks
->disk
;
684 info
->disk
.number
= super
->disks
->index
;
685 info
->disk
.raid_disk
= super
->disks
->index
;
686 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
687 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
688 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
689 s
= __le32_to_cpu(disk
->status
);
690 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
691 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
692 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
696 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
697 char *update
, char *devname
, int verbose
,
698 int uuid_set
, char *homehost
)
702 /* For 'assemble' and 'force' we need to return non-zero if any
703 * change was made. For others, the return value is ignored.
704 * Update options are:
705 * force-one : This device looks a bit old but needs to be included,
706 * update age info appropriately.
707 * assemble: clear any 'faulty' flag to allow this device to
709 * force-array: Array is degraded but being forced, mark it clean
710 * if that will be needed to assemble it.
712 * newdev: not used ????
713 * grow: Array has gained a new device - this is currently for
715 * resync: mark as dirty so a resync will happen.
716 * name: update the name - preserving the homehost
718 * Following are not relevant for this imsm:
719 * sparc2.2 : update from old dodgey metadata
720 * super-minor: change the preferred_minor number
721 * summaries: update redundant counters.
722 * uuid: Change the uuid of the array to match watch is given
723 * homehost: update the recorded homehost
724 * _reshape_progress: record new reshape_progress position.
727 //struct intel_super *super = st->sb;
728 //struct imsm_super *mpb = super->mpb;
730 if (strcmp(update
, "grow") == 0) {
732 if (strcmp(update
, "resync") == 0) {
733 /* dev->vol.dirty = 1; */
736 /* IMSM has no concept of UUID or homehost */
741 static size_t disks_to_mpb_size(int disks
)
745 size
= sizeof(struct imsm_super
);
746 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
747 size
+= 2 * sizeof(struct imsm_dev
);
748 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
749 size
+= (4 - 2) * sizeof(struct imsm_map
);
750 /* 4 possible disk_ord_tbl's */
751 size
+= 4 * (disks
- 1) * sizeof(__u32
);
756 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
758 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
761 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
764 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
768 * 0 same, or first was empty, and second was copied
769 * 1 second had wrong number
773 struct intel_super
*first
= st
->sb
;
774 struct intel_super
*sec
= tst
->sb
;
782 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
785 /* if an anchor does not have num_raid_devs set then it is a free
788 if (first
->anchor
->num_raid_devs
> 0 &&
789 sec
->anchor
->num_raid_devs
> 0) {
790 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
797 static void fd2devname(int fd
, char *name
)
806 if (fstat(fd
, &st
) != 0)
808 sprintf(path
, "/sys/dev/block/%d:%d",
809 major(st
.st_rdev
), minor(st
.st_rdev
));
811 rv
= readlink(path
, dname
, sizeof(dname
));
816 nm
= strrchr(dname
, '/');
818 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
822 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
824 static int imsm_read_serial(int fd
, char *devname
,
825 __u8 serial
[MAX_RAID_SERIAL_LEN
])
827 unsigned char scsi_serial
[255];
832 memset(scsi_serial
, 0, sizeof(scsi_serial
));
834 if (imsm_env_devname_as_serial()) {
835 char name
[MAX_RAID_SERIAL_LEN
];
837 fd2devname(fd
, name
);
838 strcpy((char *) serial
, name
);
842 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
847 Name
": Failed to retrieve serial for %s\n",
852 rsp_len
= scsi_serial
[3];
853 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
854 if (!isspace(scsi_serial
[4 + i
]))
855 serial
[cnt
++] = scsi_serial
[4 + i
];
856 if (cnt
== MAX_RAID_SERIAL_LEN
)
860 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
866 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
873 __u8 serial
[MAX_RAID_SERIAL_LEN
];
875 rv
= imsm_read_serial(fd
, devname
, serial
);
880 /* check if this is a disk we have seen before. it may be a spare in
881 * super->disks while the current anchor believes it is a raid member,
882 * check if we need to update dl->index
884 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
885 if (memcmp(dl
->serial
, serial
, MAX_RAID_SERIAL_LEN
) == 0)
889 dl
= malloc(sizeof(*dl
));
896 Name
": failed to allocate disk buffer for %s\n",
903 dl
->major
= major(stb
.st_rdev
);
904 dl
->minor
= minor(stb
.st_rdev
);
905 dl
->next
= super
->disks
;
906 dl
->fd
= keep_fd
? fd
: -1;
907 dl
->devname
= devname
? strdup(devname
) : NULL
;
908 strncpy((char *) dl
->serial
, (char *) serial
, MAX_RAID_SERIAL_LEN
);
910 } else if (keep_fd
) {
915 /* look up this disk's index in the current anchor */
916 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
917 struct imsm_disk
*disk_iter
;
919 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
921 if (memcmp(disk_iter
->serial
, dl
->serial
,
922 MAX_RAID_SERIAL_LEN
) == 0) {
925 dl
->disk
= *disk_iter
;
926 status
= __le32_to_cpu(dl
->disk
.status
);
927 /* only set index on disks that are a member of a
928 * populated contianer, i.e. one with raid_devs
930 if (status
& FAILED_DISK
)
932 else if (status
& SPARE_DISK
)
940 if (dl
->index
== -3) {
941 fprintf(stderr
, Name
": device %x:%x with serial %s"
942 " does not belong to this container\n",
943 dl
->major
, dl
->minor
, (char *) serial
);
953 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
955 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
958 static void dup_map(struct imsm_dev
*dev
)
960 struct imsm_map
*dest
= get_imsm_map(dev
, 1);
961 struct imsm_map
*src
= get_imsm_map(dev
, 0);
963 memcpy(dest
, src
, sizeof_imsm_map(src
));
966 static int parse_raid_devices(struct intel_super
*super
)
969 struct imsm_dev
*dev_new
;
972 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
973 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
975 len
= sizeof_imsm_dev(dev_iter
, 1);
976 dev_new
= malloc(len
);
979 imsm_copy_dev(dev_new
, dev_iter
);
980 super
->dev_tbl
[i
] = dev_new
;
986 /* retrieve a pointer to the bbm log which starts after all raid devices */
987 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
991 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
993 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
999 static void __free_imsm(struct intel_super
*super
, int free_disks
);
1001 /* load_imsm_mpb - read matrix metadata
1002 * allocates super->mpb to be freed by free_super
1004 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
1006 unsigned long long dsize
;
1007 unsigned long long sectors
;
1009 struct imsm_super
*anchor
;
1013 get_dev_size(fd
, NULL
, &dsize
);
1015 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
1018 Name
": Cannot seek to anchor block on %s: %s\n",
1019 devname
, strerror(errno
));
1023 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
1026 Name
": Failed to allocate imsm anchor buffer"
1027 " on %s\n", devname
);
1030 if (read(fd
, anchor
, 512) != 512) {
1033 Name
": Cannot read anchor block on %s: %s\n",
1034 devname
, strerror(errno
));
1039 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1042 Name
": no IMSM anchor on %s\n", devname
);
1047 __free_imsm(super
, 0);
1048 super
->len
= __le32_to_cpu(anchor
->mpb_size
);
1049 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1050 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1053 Name
": unable to allocate %zu byte mpb buffer\n",
1058 memcpy(super
->buf
, anchor
, 512);
1060 sectors
= mpb_sectors(anchor
) - 1;
1063 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1065 rc
= parse_raid_devices(super
);
1069 /* read the extended mpb */
1070 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1073 Name
": Cannot seek to extended mpb on %s: %s\n",
1074 devname
, strerror(errno
));
1078 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1081 Name
": Cannot read extended mpb on %s: %s\n",
1082 devname
, strerror(errno
));
1086 check_sum
= __gen_imsm_checksum(super
->anchor
);
1087 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1090 Name
": IMSM checksum %x != %x on %s\n",
1091 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1096 /* FIXME the BBM log is disk specific so we cannot use this global
1097 * buffer for all disks. Ok for now since we only look at the global
1098 * bbm_log_size parameter to gate assembly
1100 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1102 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1104 rc
= parse_raid_devices(super
);
1108 static void __free_imsm_disk(struct dl
*d
)
1117 static void free_imsm_disks(struct intel_super
*super
)
1119 while (super
->disks
) {
1120 struct dl
*d
= super
->disks
;
1122 super
->disks
= d
->next
;
1123 __free_imsm_disk(d
);
1127 /* free all the pieces hanging off of a super pointer */
1128 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1137 free_imsm_disks(super
);
1138 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1139 if (super
->dev_tbl
[i
]) {
1140 free(super
->dev_tbl
[i
]);
1141 super
->dev_tbl
[i
] = NULL
;
1145 static void free_imsm(struct intel_super
*super
)
1147 __free_imsm(super
, 1);
1151 static void free_super_imsm(struct supertype
*st
)
1153 struct intel_super
*super
= st
->sb
;
1162 static struct intel_super
*alloc_super(int creating_imsm
)
1164 struct intel_super
*super
= malloc(sizeof(*super
));
1167 memset(super
, 0, sizeof(*super
));
1168 super
->creating_imsm
= creating_imsm
;
1169 super
->current_vol
= -1;
1176 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1177 char *devname
, int keep_fd
)
1180 struct intel_super
*super
;
1181 struct mdinfo
*sd
, *best
= NULL
;
1188 /* check if this disk is a member of an active array */
1189 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1193 if (sra
->array
.major_version
!= -1 ||
1194 sra
->array
.minor_version
!= -2 ||
1195 strcmp(sra
->text_version
, "imsm") != 0)
1198 super
= alloc_super(0);
1202 /* find the most up to date disk in this array, skipping spares */
1203 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1204 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1205 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1210 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1214 if (super
->anchor
->num_raid_devs
== 0)
1217 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1218 if (!best
|| gen
> bestgen
) {
1233 /* load the most up to date anchor */
1234 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1235 dfd
= dev_open(nm
, O_RDONLY
);
1240 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1247 /* re-parse the disk list with the current anchor */
1248 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1249 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1250 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1255 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1260 if (st
->subarray
[0]) {
1261 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1262 super
->current_vol
= atoi(st
->subarray
);
1268 st
->container_dev
= fd2devnum(fd
);
1269 if (st
->ss
== NULL
) {
1270 st
->ss
= &super_imsm
;
1271 st
->minor_version
= 0;
1272 st
->max_devs
= IMSM_MAX_DEVICES
;
1279 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1281 struct intel_super
*super
;
1285 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1288 if (st
->subarray
[0])
1289 return 1; /* FIXME */
1291 super
= alloc_super(0);
1294 Name
": malloc of %zu failed.\n",
1299 rv
= load_imsm_mpb(fd
, super
, devname
);
1304 Name
": Failed to load all information "
1305 "sections on %s\n", devname
);
1311 if (st
->ss
== NULL
) {
1312 st
->ss
= &super_imsm
;
1313 st
->minor_version
= 0;
1314 st
->max_devs
= IMSM_MAX_DEVICES
;
1320 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1322 if (info
->level
== 1)
1324 return info
->chunk_size
>> 9;
1327 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1331 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1332 if (info
->level
== 1)
1338 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1340 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1343 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1344 unsigned long long size
, char *name
,
1345 char *homehost
, int *uuid
)
1347 /* We are creating a volume inside a pre-existing container.
1348 * so st->sb is already set.
1350 struct intel_super
*super
= st
->sb
;
1351 struct imsm_super
*mpb
= super
->anchor
;
1352 struct imsm_dev
*dev
;
1353 struct imsm_vol
*vol
;
1354 struct imsm_map
*map
;
1355 int idx
= mpb
->num_raid_devs
;
1357 unsigned long long array_blocks
;
1359 size_t size_old
, size_new
;
1361 if (mpb
->num_raid_devs
>= 2) {
1362 fprintf(stderr
, Name
": This imsm-container already has the "
1363 "maximum of 2 volumes\n");
1367 /* ensure the mpb is large enough for the new data */
1368 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1369 size_new
= disks_to_mpb_size(info
->nr_disks
);
1370 if (size_new
> size_old
) {
1372 size_t size_round
= ROUND_UP(size_new
, 512);
1374 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1375 fprintf(stderr
, Name
": could not allocate new mpb\n");
1378 memcpy(mpb_new
, mpb
, size_old
);
1381 super
->anchor
= mpb_new
;
1382 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1383 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1385 super
->current_vol
= idx
;
1386 /* when creating the first raid device in this container set num_disks
1387 * to zero, i.e. delete this spare and add raid member devices in
1388 * add_to_super_imsm_volume()
1390 if (super
->current_vol
== 0)
1392 sprintf(st
->subarray
, "%d", idx
);
1393 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1395 fprintf(stderr
, Name
": could not allocate raid device\n");
1398 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1399 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1400 info
->layout
, info
->chunk_size
,
1402 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1403 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1404 dev
->status
= __cpu_to_le32(0);
1405 dev
->reserved_blocks
= __cpu_to_le32(0);
1407 vol
->migr_state
= 0;
1410 for (i
= 0; i
< idx
; i
++) {
1411 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1412 struct imsm_map
*pmap
= get_imsm_map(prev
, 0);
1414 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1415 offset
+= IMSM_RESERVED_SECTORS
;
1417 map
= get_imsm_map(dev
, 0);
1418 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1419 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1420 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1421 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1422 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1423 IMSM_T_STATE_NORMAL
;
1425 if (info
->level
== 1 && info
->raid_disks
> 2) {
1426 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1427 "in a raid1 volume\n");
1430 if (info
->level
== 10)
1431 map
->raid_level
= 1;
1433 map
->raid_level
= info
->level
;
1435 map
->num_members
= info
->raid_disks
;
1436 for (i
= 0; i
< map
->num_members
; i
++) {
1437 /* initialized in add_to_super */
1438 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1440 mpb
->num_raid_devs
++;
1441 super
->dev_tbl
[super
->current_vol
] = dev
;
1446 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1447 unsigned long long size
, char *name
,
1448 char *homehost
, int *uuid
)
1450 /* This is primarily called by Create when creating a new array.
1451 * We will then get add_to_super called for each component, and then
1452 * write_init_super called to write it out to each device.
1453 * For IMSM, Create can create on fresh devices or on a pre-existing
1455 * To create on a pre-existing array a different method will be called.
1456 * This one is just for fresh drives.
1458 struct intel_super
*super
;
1459 struct imsm_super
*mpb
;
1467 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1470 super
= alloc_super(1);
1473 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1474 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1479 memset(mpb
, 0, mpb_size
);
1481 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1482 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1483 strlen(MPB_VERSION_RAID5
));
1484 mpb
->mpb_size
= mpb_size
;
1490 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1491 int fd
, char *devname
)
1493 struct intel_super
*super
= st
->sb
;
1494 struct imsm_super
*mpb
= super
->anchor
;
1496 struct imsm_dev
*dev
;
1497 struct imsm_map
*map
;
1500 dev
= get_imsm_dev(super
, super
->current_vol
);
1501 map
= get_imsm_map(dev
, 0);
1503 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1504 if (dl
->major
== dk
->major
&&
1505 dl
->minor
== dk
->minor
)
1508 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1511 /* add a pristine spare to the metadata */
1512 if (dl
->index
< 0) {
1513 dl
->index
= super
->anchor
->num_disks
;
1514 super
->anchor
->num_disks
++;
1516 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1517 status
= CONFIGURED_DISK
| USABLE_DISK
;
1518 dl
->disk
.status
= __cpu_to_le32(status
);
1520 /* if we are creating the first raid device update the family number */
1521 if (super
->current_vol
== 0) {
1523 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
1524 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
1528 sum
= __gen_imsm_checksum(mpb
);
1529 mpb
->family_num
= __cpu_to_le32(sum
);
1533 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1534 int fd
, char *devname
)
1536 struct intel_super
*super
= st
->sb
;
1538 unsigned long long size
;
1543 if (super
->current_vol
>= 0) {
1544 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1549 dd
= malloc(sizeof(*dd
));
1552 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1555 memset(dd
, 0, sizeof(*dd
));
1556 dd
->major
= major(stb
.st_rdev
);
1557 dd
->minor
= minor(stb
.st_rdev
);
1559 dd
->devname
= devname
? strdup(devname
) : NULL
;
1561 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1564 Name
": failed to retrieve scsi serial, aborting\n");
1569 get_dev_size(fd
, NULL
, &size
);
1571 status
= USABLE_DISK
| SPARE_DISK
;
1572 strcpy((char *) dd
->disk
.serial
, (char *) dd
->serial
);
1573 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
1574 dd
->disk
.status
= __cpu_to_le32(status
);
1575 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1576 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
1578 dd
->disk
.scsi_id
= __cpu_to_le32(0);
1580 if (st
->update_tail
) {
1581 dd
->next
= super
->add
;
1584 dd
->next
= super
->disks
;
1589 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1591 /* spare records have their own family number and do not have any defined raid
1594 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
1596 struct imsm_super mpb_save
;
1597 struct imsm_super
*mpb
= super
->anchor
;
1602 mpb
->num_raid_devs
= 0;
1604 mpb
->mpb_size
= sizeof(struct imsm_super
);
1605 mpb
->generation_num
= __cpu_to_le32(1UL);
1607 for (d
= super
->disks
; d
; d
= d
->next
) {
1611 mpb
->disk
[0] = d
->disk
;
1612 sum
= __gen_imsm_checksum(mpb
);
1613 mpb
->family_num
= __cpu_to_le32(sum
);
1614 sum
= __gen_imsm_checksum(mpb
);
1615 mpb
->check_sum
= __cpu_to_le32(sum
);
1617 if (store_imsm_mpb(d
->fd
, super
)) {
1618 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1619 __func__
, d
->major
, d
->minor
, strerror(errno
));
1633 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1635 struct imsm_super
*mpb
= super
->anchor
;
1642 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
1644 /* 'generation' is incremented everytime the metadata is written */
1645 generation
= __le32_to_cpu(mpb
->generation_num
);
1647 mpb
->generation_num
= __cpu_to_le32(generation
);
1649 for (d
= super
->disks
; d
; d
= d
->next
) {
1654 mpb
->disk
[d
->index
] = d
->disk
;
1655 mpb_size
+= sizeof(struct imsm_disk
);
1658 if (raid_disks
!= mpb
->num_disks
) {
1659 fprintf(stderr
, "%s: expected %d disks only found %d\n",
1660 __func__
, mpb
->num_disks
, raid_disks
);
1664 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1665 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1667 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1668 mpb_size
+= sizeof_imsm_dev(dev
, 0);
1670 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
1671 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
1673 /* recalculate checksum */
1674 sum
= __gen_imsm_checksum(mpb
);
1675 mpb
->check_sum
= __cpu_to_le32(sum
);
1677 /* write the mpb for disks that compose raid devices */
1678 for (d
= super
->disks
; d
; d
= d
->next
) {
1681 if (store_imsm_mpb(d
->fd
, super
)) {
1682 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1683 __func__
, d
->major
, d
->minor
, strerror(errno
));
1693 return write_super_imsm_spares(super
, doclose
);
1698 static int create_array(struct supertype
*st
)
1701 struct imsm_update_create_array
*u
;
1702 struct intel_super
*super
= st
->sb
;
1703 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
1705 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0);
1708 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1713 u
->type
= update_create_array
;
1714 u
->dev_idx
= super
->current_vol
;
1715 imsm_copy_dev(&u
->dev
, dev
);
1716 append_metadata_update(st
, u
, len
);
1721 static int add_disk(struct supertype
*st
)
1723 struct intel_super
*super
= st
->sb
;
1725 struct imsm_update_add_disk
*u
;
1733 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1738 u
->type
= update_add_disk
;
1739 append_metadata_update(st
, u
, len
);
1744 static int write_init_super_imsm(struct supertype
*st
)
1746 if (st
->update_tail
) {
1747 /* queue the recently created array / added disk
1748 * as a metadata update */
1749 struct intel_super
*super
= st
->sb
;
1753 /* determine if we are creating a volume or adding a disk */
1754 if (super
->current_vol
< 0) {
1755 /* in the add disk case we are running in mdmon
1756 * context, so don't close fd's
1758 return add_disk(st
);
1760 rv
= create_array(st
);
1762 for (d
= super
->disks
; d
; d
= d
->next
) {
1769 return write_super_imsm(st
->sb
, 1);
1772 static int store_zero_imsm(struct supertype
*st
, int fd
)
1774 unsigned long long dsize
;
1777 get_dev_size(fd
, NULL
, &dsize
);
1779 /* first block is stored on second to last sector of the disk */
1780 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1783 if (posix_memalign(&buf
, 512, 512) != 0)
1786 memset(buf
, 0, 512);
1787 if (write(fd
, buf
, 512) != 512)
1792 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1793 int layout
, int raiddisks
, int chunk
,
1794 unsigned long long size
, char *dev
,
1795 unsigned long long *freesize
,
1799 unsigned long long ldsize
;
1801 if (level
!= LEVEL_CONTAINER
)
1806 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1809 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1810 dev
, strerror(errno
));
1813 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1819 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1824 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1825 * FIX ME add ahci details
1827 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1828 int layout
, int raiddisks
, int chunk
,
1829 unsigned long long size
, char *dev
,
1830 unsigned long long *freesize
,
1834 struct intel_super
*super
= st
->sb
;
1836 unsigned long long pos
= 0;
1837 unsigned long long maxsize
;
1841 if (level
== LEVEL_CONTAINER
)
1844 if (level
== 1 && raiddisks
> 2) {
1846 fprintf(stderr
, Name
": imsm does not support more "
1847 "than 2 in a raid1 configuration\n");
1851 /* We must have the container info already read in. */
1856 /* General test: make sure there is space for
1857 * 'raiddisks' device extents of size 'size' at a given
1860 unsigned long long minsize
= size
*2 /* convert to blocks */;
1861 unsigned long long start_offset
= ~0ULL;
1864 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1865 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1870 e
= get_extents(super
, dl
);
1873 unsigned long long esize
;
1874 esize
= e
[i
].start
- pos
;
1875 if (esize
>= minsize
)
1877 if (found
&& start_offset
== ~0ULL) {
1880 } else if (found
&& pos
!= start_offset
) {
1884 pos
= e
[i
].start
+ e
[i
].size
;
1886 } while (e
[i
-1].size
);
1891 if (dcnt
< raiddisks
) {
1893 fprintf(stderr
, Name
": imsm: Not enough "
1894 "devices with space for this array "
1901 /* This device must be a member of the set */
1902 if (stat(dev
, &stb
) < 0)
1904 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1906 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1907 if (dl
->major
== major(stb
.st_rdev
) &&
1908 dl
->minor
== minor(stb
.st_rdev
))
1913 fprintf(stderr
, Name
": %s is not in the "
1914 "same imsm set\n", dev
);
1917 e
= get_extents(super
, dl
);
1921 unsigned long long esize
;
1922 esize
= e
[i
].start
- pos
;
1923 if (esize
>= maxsize
)
1925 pos
= e
[i
].start
+ e
[i
].size
;
1927 } while (e
[i
-1].size
);
1928 *freesize
= maxsize
;
1933 int imsm_bbm_log_size(struct imsm_super
*mpb
)
1935 return __le32_to_cpu(mpb
->bbm_log_size
);
1938 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1939 int raiddisks
, int chunk
, unsigned long long size
,
1940 char *dev
, unsigned long long *freesize
,
1946 /* if given unused devices create a container
1947 * if given given devices in a container create a member volume
1949 if (level
== LEVEL_CONTAINER
) {
1950 /* Must be a fresh device to add to a container */
1951 return validate_geometry_imsm_container(st
, level
, layout
,
1952 raiddisks
, chunk
, size
,
1958 /* creating in a given container */
1959 return validate_geometry_imsm_volume(st
, level
, layout
,
1960 raiddisks
, chunk
, size
,
1961 dev
, freesize
, verbose
);
1964 /* limit creation to the following levels */
1976 /* This device needs to be a device in an 'imsm' container */
1977 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1981 Name
": Cannot create this array on device %s\n",
1986 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
1988 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1989 dev
, strerror(errno
));
1992 /* Well, it is in use by someone, maybe an 'imsm' container. */
1993 cfd
= open_container(fd
);
1997 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
2001 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
2003 if (sra
&& sra
->array
.major_version
== -1 &&
2004 strcmp(sra
->text_version
, "imsm") == 0) {
2005 /* This is a member of a imsm container. Load the container
2006 * and try to create a volume
2008 struct intel_super
*super
;
2010 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
2012 st
->container_dev
= fd2devnum(cfd
);
2014 return validate_geometry_imsm_volume(st
, level
, layout
,
2020 } else /* may belong to another container */
2026 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
2028 /* Given a container loaded by load_super_imsm_all,
2029 * extract information about all the arrays into
2032 * For each imsm_dev create an mdinfo, fill it in,
2033 * then look for matching devices in super->disks
2034 * and create appropriate device mdinfo.
2036 struct intel_super
*super
= st
->sb
;
2037 struct imsm_super
*mpb
= super
->anchor
;
2038 struct mdinfo
*rest
= NULL
;
2041 /* do not assemble arrays that might have bad blocks */
2042 if (imsm_bbm_log_size(super
->anchor
)) {
2043 fprintf(stderr
, Name
": BBM log found in metadata. "
2044 "Cannot activate array(s).\n");
2048 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2049 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
2050 struct imsm_vol
*vol
= &dev
->vol
;
2051 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2052 struct mdinfo
*this;
2055 this = malloc(sizeof(*this));
2056 memset(this, 0, sizeof(*this));
2059 this->array
.level
= get_imsm_raid_level(map
);
2060 this->array
.raid_disks
= map
->num_members
;
2061 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
2062 this->array
.md_minor
= -1;
2063 this->array
.ctime
= 0;
2064 this->array
.utime
= 0;
2065 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
2066 this->array
.state
= !vol
->dirty
;
2067 this->container_member
= i
;
2068 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
||
2069 dev
->vol
.dirty
|| dev
->vol
.migr_state
)
2070 this->resync_start
= 0;
2072 this->resync_start
= ~0ULL;
2074 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
2075 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
2077 sprintf(this->text_version
, "/%s/%d",
2078 devnum2devname(st
->container_dev
),
2079 this->container_member
);
2081 memset(this->uuid
, 0, sizeof(this->uuid
));
2083 this->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2085 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
2086 struct mdinfo
*info_d
;
2094 idx
= get_imsm_disk_idx(map
, slot
);
2095 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
2096 for (d
= super
->disks
; d
; d
= d
->next
)
2097 if (d
->index
== idx
)
2103 s
= d
? __le32_to_cpu(d
->disk
.status
) : 0;
2104 if (s
& FAILED_DISK
)
2106 if (!(s
& USABLE_DISK
))
2108 if (ord
& IMSM_ORD_REBUILD
)
2112 * if we skip some disks the array will be assmebled degraded;
2113 * reset resync start to avoid a dirty-degraded situation
2115 * FIXME handle dirty degraded
2117 if (skip
&& !dev
->vol
.dirty
)
2118 this->resync_start
= ~0ULL;
2122 info_d
= malloc(sizeof(*info_d
));
2124 fprintf(stderr
, Name
": failed to allocate disk"
2125 " for volume %s\n", (char *) dev
->volume
);
2130 memset(info_d
, 0, sizeof(*info_d
));
2131 info_d
->next
= this->devs
;
2132 this->devs
= info_d
;
2134 info_d
->disk
.number
= d
->index
;
2135 info_d
->disk
.major
= d
->major
;
2136 info_d
->disk
.minor
= d
->minor
;
2137 info_d
->disk
.raid_disk
= slot
;
2139 this->array
.working_disks
++;
2141 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
2142 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2143 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2145 strcpy(info_d
->name
, d
->devname
);
2154 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
2157 struct intel_super
*super
= c
->sb
;
2158 struct imsm_super
*mpb
= super
->anchor
;
2160 if (atoi(inst
) >= mpb
->num_raid_devs
) {
2161 fprintf(stderr
, "%s: subarry index %d, out of range\n",
2162 __func__
, atoi(inst
));
2166 dprintf("imsm: open_new %s\n", inst
);
2167 a
->info
.container_member
= atoi(inst
);
2171 static __u8
imsm_check_degraded(struct intel_super
*super
, int n
, int failed
)
2173 struct imsm_dev
*dev
= get_imsm_dev(super
, n
);
2174 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2177 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
2178 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
2180 switch (get_imsm_raid_level(map
)) {
2182 return IMSM_T_STATE_FAILED
;
2185 if (failed
< map
->num_members
)
2186 return IMSM_T_STATE_DEGRADED
;
2188 return IMSM_T_STATE_FAILED
;
2193 * check to see if any mirrors have failed,
2194 * otherwise we are degraded
2196 int device_per_mirror
= 2; /* FIXME is this always the case?
2197 * and are they always adjacent?
2202 for (i
= 0; i
< map
->num_members
; i
++) {
2203 int idx
= get_imsm_disk_idx(map
, i
);
2204 struct imsm_disk
*disk
= get_imsm_disk(super
, idx
);
2206 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2209 if (failed
>= device_per_mirror
)
2210 return IMSM_T_STATE_FAILED
;
2212 /* reset 'failed' for next mirror set */
2213 if (!((i
+ 1) % device_per_mirror
))
2217 return IMSM_T_STATE_DEGRADED
;
2221 return IMSM_T_STATE_DEGRADED
;
2223 return IMSM_T_STATE_FAILED
;
2229 return map
->map_state
;
2232 static int imsm_count_failed(struct intel_super
*super
, struct imsm_map
*map
)
2236 struct imsm_disk
*disk
;
2238 for (i
= 0; i
< map
->num_members
; i
++) {
2239 int idx
= get_imsm_disk_idx(map
, i
);
2241 disk
= get_imsm_disk(super
, idx
);
2242 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2244 else if (!(__le32_to_cpu(disk
->status
) & USABLE_DISK
))
2251 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
2253 int inst
= a
->info
.container_member
;
2254 struct intel_super
*super
= a
->container
->sb
;
2255 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2256 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2257 int dirty
= !consistent
;
2261 failed
= imsm_count_failed(super
, map
);
2262 map_state
= imsm_check_degraded(super
, inst
, failed
);
2264 if (consistent
&& !dev
->vol
.dirty
&&
2265 (dev
->vol
.migr_state
|| map_state
!= IMSM_T_STATE_NORMAL
))
2266 a
->resync_start
= 0ULL;
2267 if (consistent
== 2 && a
->resync_start
!= ~0ULL)
2270 if (a
->resync_start
== ~0ULL) {
2271 /* complete recovery or initial resync */
2272 if (map
->map_state
!= map_state
) {
2273 dprintf("imsm: map_state %d: %d\n",
2275 map
->map_state
= map_state
;
2276 super
->updates_pending
++;
2278 if (dev
->vol
.migr_state
) {
2279 dprintf("imsm: mark resync complete\n");
2280 dev
->vol
.migr_state
= 0;
2281 dev
->vol
.migr_type
= 0;
2282 super
->updates_pending
++;
2284 } else if (!dev
->vol
.migr_state
) {
2285 dprintf("imsm: mark '%s' (%llu)\n",
2286 failed
? "rebuild" : "initializing", a
->resync_start
);
2287 /* mark that we are rebuilding */
2288 map
->map_state
= failed
? map_state
: IMSM_T_STATE_NORMAL
;
2289 dev
->vol
.migr_state
= 1;
2290 dev
->vol
.migr_type
= failed
? 1 : 0;
2292 a
->check_degraded
= 1;
2293 super
->updates_pending
++;
2296 /* mark dirty / clean */
2297 if (dirty
!= dev
->vol
.dirty
) {
2298 dprintf("imsm: mark '%s' (%llu)\n",
2299 dirty
? "dirty" : "clean", a
->resync_start
);
2300 dev
->vol
.dirty
= dirty
;
2301 super
->updates_pending
++;
2306 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2308 int inst
= a
->info
.container_member
;
2309 struct intel_super
*super
= a
->container
->sb
;
2310 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2311 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2312 struct imsm_disk
*disk
;
2315 int new_failure
= 0;
2317 if (n
> map
->num_members
)
2318 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2319 n
, map
->num_members
- 1);
2324 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2326 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, n
));
2328 /* check for new failures */
2329 status
= __le32_to_cpu(disk
->status
);
2330 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2331 status
|= FAILED_DISK
;
2332 disk
->status
= __cpu_to_le32(status
);
2334 super
->updates_pending
++;
2336 /* check if in_sync */
2337 if ((state
& DS_INSYNC
) && !(status
& USABLE_DISK
)) {
2338 status
|= USABLE_DISK
;
2339 disk
->status
= __cpu_to_le32(status
);
2340 super
->updates_pending
++;
2343 /* the number of failures have changed, count up 'failed' to determine
2344 * degraded / failed status
2346 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
2347 failed
= imsm_count_failed(super
, map
);
2349 /* determine map_state based on failed or in_sync count */
2351 map
->map_state
= imsm_check_degraded(super
, inst
, failed
);
2352 else if (map
->map_state
== IMSM_T_STATE_DEGRADED
) {
2356 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2357 if (d
->curr_state
& DS_INSYNC
)
2360 if (working
== a
->info
.array
.raid_disks
) {
2361 map
->map_state
= IMSM_T_STATE_NORMAL
;
2362 dev
->vol
.migr_state
= 0;
2363 dev
->vol
.migr_type
= 0;
2364 super
->updates_pending
++;
2369 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2371 struct imsm_super
*mpb
= super
->anchor
;
2372 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2373 unsigned long long dsize
;
2374 unsigned long long sectors
;
2376 get_dev_size(fd
, NULL
, &dsize
);
2378 if (mpb_size
> 512) {
2379 /* -1 to account for anchor */
2380 sectors
= mpb_sectors(mpb
) - 1;
2382 /* write the extended mpb to the sectors preceeding the anchor */
2383 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2386 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2390 /* first block is stored on second to last sector of the disk */
2391 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2394 if (write(fd
, super
->buf
, 512) != 512)
2400 static void imsm_sync_metadata(struct supertype
*container
)
2402 struct intel_super
*super
= container
->sb
;
2404 if (!super
->updates_pending
)
2407 write_super_imsm(super
, 0);
2409 super
->updates_pending
= 0;
2412 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
2414 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2415 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2416 int i
= get_imsm_disk_idx(map
, idx
);
2419 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2423 if (__le32_to_cpu(dl
->disk
.status
) & FAILED_DISK
)
2427 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
2432 static struct dl
*imsm_add_spare(struct intel_super
*super
, int idx
, struct active_array
*a
)
2434 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2435 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2436 unsigned long long esize
;
2437 unsigned long long pos
;
2446 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2447 /* If in this array, skip */
2448 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2449 if (d
->disk
.major
== dl
->major
&&
2450 d
->disk
.minor
== dl
->minor
) {
2451 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2457 /* skip marked in use or failed drives */
2458 status
= __le32_to_cpu(dl
->disk
.status
);
2459 if (status
& FAILED_DISK
|| status
& CONFIGURED_DISK
) {
2460 dprintf("%x:%x status ( %s%s)\n",
2461 dl
->major
, dl
->minor
,
2462 status
& FAILED_DISK
? "failed " : "",
2463 status
& CONFIGURED_DISK
? "configured " : "");
2467 /* Does this unused device have the requisite free space?
2468 * We need a->info.component_size sectors
2470 ex
= get_extents(super
, dl
);
2472 dprintf("cannot get extents\n");
2478 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2481 /* check that we can start at pba_of_lba0 with
2482 * a->info.component_size of space
2484 esize
= ex
[j
].start
- pos
;
2485 if (array_start
>= pos
&&
2486 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2490 pos
= ex
[j
].start
+ ex
[j
].size
;
2493 } while (ex
[j
-1].size
);
2497 dprintf("%x:%x does not have %llu at %d\n",
2498 dl
->major
, dl
->minor
,
2499 a
->info
.component_size
,
2500 __le32_to_cpu(map
->pba_of_lba0
));
2510 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2511 struct metadata_update
**updates
)
2514 * Find a device with unused free space and use it to replace a
2515 * failed/vacant region in an array. We replace failed regions one a
2516 * array at a time. The result is that a new spare disk will be added
2517 * to the first failed array and after the monitor has finished
2518 * propagating failures the remainder will be consumed.
2520 * FIXME add a capability for mdmon to request spares from another
2524 struct intel_super
*super
= a
->container
->sb
;
2525 int inst
= a
->info
.container_member
;
2526 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2527 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2528 int failed
= a
->info
.array
.raid_disks
;
2529 struct mdinfo
*rv
= NULL
;
2532 struct metadata_update
*mu
;
2534 struct imsm_update_activate_spare
*u
;
2538 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2539 if ((d
->curr_state
& DS_FAULTY
) &&
2541 /* wait for Removal to happen */
2543 if (d
->state_fd
>= 0)
2547 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2548 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2549 if (imsm_check_degraded(super
, inst
, failed
) != IMSM_T_STATE_DEGRADED
)
2552 /* For each slot, if it is not working, find a spare */
2553 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2554 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2555 if (d
->disk
.raid_disk
== i
)
2557 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2558 if (d
&& (d
->state_fd
>= 0))
2562 * OK, this device needs recovery. Try to re-add the previous
2563 * occupant of this slot, if this fails add a new spare
2565 dl
= imsm_readd(super
, i
, a
);
2567 dl
= imsm_add_spare(super
, i
, a
);
2571 /* found a usable disk with enough space */
2572 di
= malloc(sizeof(*di
));
2573 memset(di
, 0, sizeof(*di
));
2575 /* dl->index will be -1 in the case we are activating a
2576 * pristine spare. imsm_process_update() will create a
2577 * new index in this case. Once a disk is found to be
2578 * failed in all member arrays it is kicked from the
2581 di
->disk
.number
= dl
->index
;
2583 /* (ab)use di->devs to store a pointer to the device
2586 di
->devs
= (struct mdinfo
*) dl
;
2588 di
->disk
.raid_disk
= i
;
2589 di
->disk
.major
= dl
->major
;
2590 di
->disk
.minor
= dl
->minor
;
2592 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2593 di
->component_size
= a
->info
.component_size
;
2594 di
->container_member
= inst
;
2598 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2599 i
, di
->data_offset
);
2605 /* No spares found */
2607 /* Now 'rv' has a list of devices to return.
2608 * Create a metadata_update record to update the
2609 * disk_ord_tbl for the array
2611 mu
= malloc(sizeof(*mu
));
2612 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2614 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2615 mu
->next
= *updates
;
2616 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2618 for (di
= rv
; di
; di
= di
->next
) {
2619 u
->type
= update_activate_spare
;
2620 u
->dl
= (struct dl
*) di
->devs
;
2622 u
->slot
= di
->disk
.raid_disk
;
2633 static int disks_overlap(struct imsm_map
*m1
, struct imsm_map
*m2
)
2639 for (i
= 0; i
< m1
->num_members
; i
++) {
2640 idx
= get_imsm_disk_idx(m1
, i
);
2641 for (j
= 0; j
< m2
->num_members
; j
++)
2642 if (idx
== get_imsm_disk_idx(m2
, j
))
2649 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
);
2651 static void imsm_process_update(struct supertype
*st
,
2652 struct metadata_update
*update
)
2655 * crack open the metadata_update envelope to find the update record
2656 * update can be one of:
2657 * update_activate_spare - a spare device has replaced a failed
2658 * device in an array, update the disk_ord_tbl. If this disk is
2659 * present in all member arrays then also clear the SPARE_DISK
2662 struct intel_super
*super
= st
->sb
;
2663 struct imsm_super
*mpb
= super
->anchor
;
2664 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2667 case update_activate_spare
: {
2668 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
2669 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
2670 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2671 struct active_array
*a
;
2672 struct imsm_disk
*disk
;
2679 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2684 fprintf(stderr
, "error: imsm_activate_spare passed "
2685 "an unknown disk (index: %d serial: %s)\n",
2686 u
->dl
->index
, u
->dl
->serial
);
2690 super
->updates_pending
++;
2692 /* adding a pristine spare, assign a new index */
2693 if (dl
->index
< 0) {
2694 dl
->index
= super
->anchor
->num_disks
;
2695 super
->anchor
->num_disks
++;
2697 victim
= get_imsm_disk_idx(map
, u
->slot
);
2698 map
->disk_ord_tbl
[u
->slot
] = __cpu_to_le32(dl
->index
);
2700 status
= __le32_to_cpu(disk
->status
);
2701 status
|= CONFIGURED_DISK
;
2702 status
&= ~(SPARE_DISK
| USABLE_DISK
);
2703 disk
->status
= __cpu_to_le32(status
);
2705 /* count arrays using the victim in the metadata */
2707 for (a
= st
->arrays
; a
; a
= a
->next
) {
2708 dev
= get_imsm_dev(super
, a
->info
.container_member
);
2709 map
= get_imsm_map(dev
, 0);
2710 for (i
= 0; i
< map
->num_members
; i
++)
2711 if (victim
== get_imsm_disk_idx(map
, i
))
2715 /* clear some flags if the victim is no longer being
2720 for (dlp
= &super
->disks
; *dlp
; )
2721 if ((*dlp
)->index
== victim
)
2723 disk
= &(*dlp
)->disk
;
2724 status
= __le32_to_cpu(disk
->status
);
2725 status
&= ~(CONFIGURED_DISK
| USABLE_DISK
);
2726 disk
->status
= __cpu_to_le32(status
);
2727 /* We know that 'manager' isn't touching anything,
2730 imsm_delete(super
, dlp
);
2734 case update_create_array
: {
2735 /* someone wants to create a new array, we need to be aware of
2736 * a few races/collisions:
2737 * 1/ 'Create' called by two separate instances of mdadm
2738 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
2739 * devices that have since been assimilated via
2741 * In the event this update can not be carried out mdadm will
2742 * (FIX ME) notice that its update did not take hold.
2744 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2745 struct imsm_dev
*dev
;
2746 struct imsm_map
*map
, *new_map
;
2747 unsigned long long start
, end
;
2748 unsigned long long new_start
, new_end
;
2752 /* handle racing creates: first come first serve */
2753 if (u
->dev_idx
< mpb
->num_raid_devs
) {
2754 dprintf("%s: subarray %d already defined\n",
2755 __func__
, u
->dev_idx
);
2759 /* check update is next in sequence */
2760 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
2761 dprintf("%s: can not create array %d expected index %d\n",
2762 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
2766 new_map
= get_imsm_map(&u
->dev
, 0);
2767 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
2768 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
2770 /* handle activate_spare versus create race:
2771 * check to make sure that overlapping arrays do not include
2774 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2775 dev
= get_imsm_dev(super
, i
);
2776 map
= get_imsm_map(dev
, 0);
2777 start
= __le32_to_cpu(map
->pba_of_lba0
);
2778 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
2779 if ((new_start
>= start
&& new_start
<= end
) ||
2780 (start
>= new_start
&& start
<= new_end
))
2782 if (overlap
&& disks_overlap(map
, new_map
)) {
2783 dprintf("%s: arrays overlap\n", __func__
);
2787 /* check num_members sanity */
2788 if (new_map
->num_members
> mpb
->num_disks
) {
2789 dprintf("%s: num_disks out of range\n", __func__
);
2793 /* check that prepare update was successful */
2794 if (!update
->space
) {
2795 dprintf("%s: prepare update failed\n", __func__
);
2799 super
->updates_pending
++;
2800 dev
= update
->space
;
2801 update
->space
= NULL
;
2802 imsm_copy_dev(dev
, &u
->dev
);
2803 super
->dev_tbl
[u
->dev_idx
] = dev
;
2804 mpb
->num_raid_devs
++;
2806 /* fix up flags, if arrays overlap then the drives can not be
2809 for (i
= 0; i
< map
->num_members
; i
++) {
2810 struct imsm_disk
*disk
;
2813 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, i
));
2814 status
= __le32_to_cpu(disk
->status
);
2815 status
|= CONFIGURED_DISK
;
2817 status
&= ~SPARE_DISK
;
2818 disk
->status
= __cpu_to_le32(status
);
2822 case update_add_disk
:
2824 /* we may be able to repair some arrays if disks are
2827 struct active_array
*a
;
2828 for (a
= st
->arrays
; a
; a
= a
->next
)
2829 a
->check_degraded
= 1;
2831 /* check if we can add / replace some disks in the
2833 while (super
->add
) {
2834 struct dl
**dlp
, *dl
, *al
;
2836 super
->add
= al
->next
;
2837 for (dlp
= &super
->disks
; *dlp
; ) {
2838 if (memcmp(al
->serial
, (*dlp
)->serial
,
2839 MAX_RAID_SERIAL_LEN
) == 0) {
2841 *dlp
= (*dlp
)->next
;
2842 __free_imsm_disk(dl
);
2845 dlp
= &(*dlp
)->next
;
2847 al
->next
= super
->disks
;
2855 static void imsm_prepare_update(struct supertype
*st
,
2856 struct metadata_update
*update
)
2859 * Allocate space to hold new disk entries, raid-device entries or a
2860 * new mpb if necessary. We currently maintain an mpb large enough to
2861 * hold 2 subarrays for the given number of disks. This may not be
2862 * sufficient when reshaping.
2864 * FIX ME handle the reshape case.
2866 * The monitor will be able to safely change super->mpb by arranging
2867 * for it to be freed in check_update_queue(). I.e. the monitor thread
2868 * will start using the new pointer and the manager can continue to use
2869 * the old value until check_update_queue() runs.
2871 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2874 case update_create_array
: {
2875 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2876 size_t len
= sizeof_imsm_dev(&u
->dev
, 1);
2878 update
->space
= malloc(len
);
2888 /* must be called while manager is quiesced */
2889 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
)
2891 struct imsm_super
*mpb
= super
->anchor
;
2892 struct dl
*dl
= *dlp
;
2894 struct imsm_dev
*dev
;
2895 struct imsm_map
*map
;
2898 dprintf("%s: deleting device %x:%x from imsm_super\n",
2899 __func__
, dl
->major
, dl
->minor
);
2901 /* shift all indexes down one */
2902 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
2903 if (iter
->index
> dl
->index
)
2906 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2907 dev
= get_imsm_dev(super
, i
);
2908 map
= get_imsm_map(dev
, 0);
2910 for (j
= 0; j
< map
->num_members
; j
++) {
2911 int idx
= get_imsm_disk_idx(map
, j
);
2913 if (idx
> dl
->index
)
2914 map
->disk_ord_tbl
[j
] = __cpu_to_le32(idx
- 1);
2919 super
->updates_pending
++;
2920 *dlp
= (*dlp
)->next
;
2921 __free_imsm_disk(dl
);
2924 struct superswitch super_imsm
= {
2926 .examine_super
= examine_super_imsm
,
2927 .brief_examine_super
= brief_examine_super_imsm
,
2928 .detail_super
= detail_super_imsm
,
2929 .brief_detail_super
= brief_detail_super_imsm
,
2930 .write_init_super
= write_init_super_imsm
,
2932 .match_home
= match_home_imsm
,
2933 .uuid_from_super
= uuid_from_super_imsm
,
2934 .getinfo_super
= getinfo_super_imsm
,
2935 .update_super
= update_super_imsm
,
2937 .avail_size
= avail_size_imsm
,
2939 .compare_super
= compare_super_imsm
,
2941 .load_super
= load_super_imsm
,
2942 .init_super
= init_super_imsm
,
2943 .add_to_super
= add_to_super_imsm
,
2944 .store_super
= store_zero_imsm
,
2945 .free_super
= free_super_imsm
,
2946 .match_metadata_desc
= match_metadata_desc_imsm
,
2947 .container_content
= container_content_imsm
,
2949 .validate_geometry
= validate_geometry_imsm
,
2953 .open_new
= imsm_open_new
,
2954 .load_super
= load_super_imsm
,
2955 .set_array_state
= imsm_set_array_state
,
2956 .set_disk
= imsm_set_disk
,
2957 .sync_metadata
= imsm_sync_metadata
,
2958 .activate_spare
= imsm_activate_spare
,
2959 .process_update
= imsm_process_update
,
2960 .prepare_update
= imsm_prepare_update
,