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_ord_tbl_ent(struct imsm_dev
*dev
, int slot
)
350 struct imsm_map
*map
;
352 if (dev
->vol
.migr_state
)
353 map
= get_imsm_map(dev
, 1);
355 map
= get_imsm_map(dev
, 0);
357 /* top byte identifies disk under rebuild */
358 return __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
361 #define ord_to_idx(ord) (((ord) << 8) >> 8)
362 static __u32
get_imsm_disk_idx(struct imsm_dev
*dev
, int slot
)
364 __u32 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
366 return ord_to_idx(ord
);
369 static void set_imsm_ord_tbl_ent(struct imsm_map
*map
, int slot
, __u32 ord
)
371 map
->disk_ord_tbl
[slot
] = __cpu_to_le32(ord
);
374 static int get_imsm_raid_level(struct imsm_map
*map
)
376 if (map
->raid_level
== 1) {
377 if (map
->num_members
== 2)
383 return map
->raid_level
;
386 static int cmp_extent(const void *av
, const void *bv
)
388 const struct extent
*a
= av
;
389 const struct extent
*b
= bv
;
390 if (a
->start
< b
->start
)
392 if (a
->start
> b
->start
)
397 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
399 /* find a list of used extents on the given physical device */
400 struct extent
*rv
, *e
;
404 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
405 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
406 struct imsm_map
*map
= get_imsm_map(dev
, 0);
408 for (j
= 0; j
< map
->num_members
; j
++) {
409 __u32 index
= get_imsm_disk_idx(dev
, j
);
411 if (index
== dl
->index
)
415 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
420 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
421 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
422 struct imsm_map
*map
= get_imsm_map(dev
, 0);
424 for (j
= 0; j
< map
->num_members
; j
++) {
425 __u32 index
= get_imsm_disk_idx(dev
, j
);
427 if (index
== dl
->index
) {
428 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
429 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
434 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
436 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) -
437 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
443 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
447 struct imsm_map
*map
= get_imsm_map(dev
, 0);
451 printf("[%s]:\n", dev
->volume
);
452 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
453 printf(" Members : %d\n", map
->num_members
);
454 for (slot
= 0; slot
< map
->num_members
; slot
++)
455 if (index
== get_imsm_disk_idx(dev
, slot
))
457 if (slot
< map
->num_members
) {
458 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
459 printf(" This Slot : %d%s\n", slot
,
460 ord
& IMSM_ORD_REBUILD
? " (out-of-sync)" : "");
462 printf(" This Slot : ?\n");
463 sz
= __le32_to_cpu(dev
->size_high
);
465 sz
+= __le32_to_cpu(dev
->size_low
);
466 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
467 human_size(sz
* 512));
468 sz
= __le32_to_cpu(map
->blocks_per_member
);
469 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
470 human_size(sz
* 512));
471 printf(" Sector Offset : %u\n",
472 __le32_to_cpu(map
->pba_of_lba0
));
473 printf(" Num Stripes : %u\n",
474 __le32_to_cpu(map
->num_data_stripes
));
475 printf(" Chunk Size : %u KiB\n",
476 __le16_to_cpu(map
->blocks_per_strip
) / 2);
477 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
478 printf(" Migrate State : %s", dev
->vol
.migr_state
? "migrating" : "idle");
479 if (dev
->vol
.migr_state
)
480 printf(": %s", dev
->vol
.migr_type
? "rebuilding" : "initializing");
482 printf(" Map State : %s", map_state_str
[map
->map_state
]);
483 if (dev
->vol
.migr_state
) {
484 struct imsm_map
*map
= get_imsm_map(dev
, 1);
485 printf(" <-- %s", map_state_str
[map
->map_state
]);
488 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
491 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
493 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
494 char str
[MAX_RAID_SERIAL_LEN
];
502 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
503 printf(" Disk%02d Serial : %s\n", index
, str
);
504 s
= __le32_to_cpu(disk
->status
);
505 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
506 s
&CONFIGURED_DISK
? " active" : "",
507 s
&FAILED_DISK
? " failed" : "",
508 s
&USABLE_DISK
? " usable" : "");
509 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
510 sz
= __le32_to_cpu(disk
->total_blocks
) -
511 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
512 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
513 human_size(sz
* 512));
516 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
518 struct intel_super
*super
= st
->sb
;
519 struct imsm_super
*mpb
= super
->anchor
;
520 char str
[MAX_SIGNATURE_LENGTH
];
524 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
525 printf(" Magic : %s\n", str
);
526 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
527 printf(" Version : %s\n", get_imsm_version(mpb
));
528 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
529 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
530 sum
= __le32_to_cpu(mpb
->check_sum
);
531 printf(" Checksum : %08x %s\n", sum
,
532 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
533 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
534 printf(" Disks : %d\n", mpb
->num_disks
);
535 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
536 print_imsm_disk(mpb
, super
->disks
->index
);
537 if (super
->bbm_log
) {
538 struct bbm_log
*log
= super
->bbm_log
;
541 printf("Bad Block Management Log:\n");
542 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
543 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
544 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
545 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
546 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
548 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
549 print_imsm_dev(__get_imsm_dev(mpb
, i
), super
->disks
->index
);
550 for (i
= 0; i
< mpb
->num_disks
; i
++) {
551 if (i
== super
->disks
->index
)
553 print_imsm_disk(mpb
, i
);
557 static void brief_examine_super_imsm(struct supertype
*st
)
559 printf("ARRAY /dev/imsm metadata=imsm\n");
562 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
564 printf("%s\n", __FUNCTION__
);
567 static void brief_detail_super_imsm(struct supertype
*st
)
569 printf("%s\n", __FUNCTION__
);
573 static int match_home_imsm(struct supertype
*st
, char *homehost
)
575 printf("%s\n", __FUNCTION__
);
580 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
582 /* imsm does not track uuid's so just make sure we never return
583 * the same value twice to break uuid matching in Manage_subdevs
584 * FIXME what about the use of uuid's with bitmap's?
586 static int dummy_id
= 0;
588 uuid
[0] = dummy_id
++;
593 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
595 __u8
*v
= get_imsm_version(mpb
);
596 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
597 char major
[] = { 0, 0, 0 };
598 char minor
[] = { 0 ,0, 0 };
599 char patch
[] = { 0, 0, 0 };
600 char *ver_parse
[] = { major
, minor
, patch
};
604 while (*v
!= '\0' && v
< end
) {
605 if (*v
!= '.' && j
< 2)
606 ver_parse
[i
][j
++] = *v
;
614 *m
= strtol(minor
, NULL
, 0);
615 *p
= strtol(patch
, NULL
, 0);
619 static int imsm_level_to_layout(int level
)
627 return ALGORITHM_LEFT_ASYMMETRIC
;
629 return 0x102; //FIXME is this correct?
634 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
636 struct intel_super
*super
= st
->sb
;
637 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
638 struct imsm_map
*map
= get_imsm_map(dev
, 0);
640 info
->container_member
= super
->current_vol
;
641 info
->array
.raid_disks
= map
->num_members
;
642 info
->array
.level
= get_imsm_raid_level(map
);
643 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
644 info
->array
.md_minor
= -1;
645 info
->array
.ctime
= 0;
646 info
->array
.utime
= 0;
647 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
649 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
650 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
652 info
->disk
.major
= 0;
653 info
->disk
.minor
= 0;
655 sprintf(info
->text_version
, "/%s/%d",
656 devnum2devname(st
->container_dev
),
657 info
->container_member
);
661 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
663 struct intel_super
*super
= st
->sb
;
664 struct imsm_disk
*disk
;
667 if (super
->current_vol
>= 0) {
668 getinfo_super_imsm_volume(st
, info
);
672 /* Set raid_disks to zero so that Assemble will always pull in valid
675 info
->array
.raid_disks
= 0;
676 info
->array
.level
= LEVEL_CONTAINER
;
677 info
->array
.layout
= 0;
678 info
->array
.md_minor
= -1;
679 info
->array
.ctime
= 0; /* N/A for imsm */
680 info
->array
.utime
= 0;
681 info
->array
.chunk_size
= 0;
683 info
->disk
.major
= 0;
684 info
->disk
.minor
= 0;
685 info
->disk
.raid_disk
= -1;
686 info
->reshape_active
= 0;
687 strcpy(info
->text_version
, "imsm");
688 info
->disk
.number
= -1;
689 info
->disk
.state
= 0;
692 disk
= &super
->disks
->disk
;
693 info
->disk
.number
= super
->disks
->index
;
694 info
->disk
.raid_disk
= super
->disks
->index
;
695 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
696 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
697 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
698 s
= __le32_to_cpu(disk
->status
);
699 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
700 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
701 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
705 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
706 char *update
, char *devname
, int verbose
,
707 int uuid_set
, char *homehost
)
711 /* For 'assemble' and 'force' we need to return non-zero if any
712 * change was made. For others, the return value is ignored.
713 * Update options are:
714 * force-one : This device looks a bit old but needs to be included,
715 * update age info appropriately.
716 * assemble: clear any 'faulty' flag to allow this device to
718 * force-array: Array is degraded but being forced, mark it clean
719 * if that will be needed to assemble it.
721 * newdev: not used ????
722 * grow: Array has gained a new device - this is currently for
724 * resync: mark as dirty so a resync will happen.
725 * name: update the name - preserving the homehost
727 * Following are not relevant for this imsm:
728 * sparc2.2 : update from old dodgey metadata
729 * super-minor: change the preferred_minor number
730 * summaries: update redundant counters.
731 * uuid: Change the uuid of the array to match watch is given
732 * homehost: update the recorded homehost
733 * _reshape_progress: record new reshape_progress position.
736 //struct intel_super *super = st->sb;
737 //struct imsm_super *mpb = super->mpb;
739 if (strcmp(update
, "grow") == 0) {
741 if (strcmp(update
, "resync") == 0) {
742 /* dev->vol.dirty = 1; */
745 /* IMSM has no concept of UUID or homehost */
750 static size_t disks_to_mpb_size(int disks
)
754 size
= sizeof(struct imsm_super
);
755 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
756 size
+= 2 * sizeof(struct imsm_dev
);
757 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
758 size
+= (4 - 2) * sizeof(struct imsm_map
);
759 /* 4 possible disk_ord_tbl's */
760 size
+= 4 * (disks
- 1) * sizeof(__u32
);
765 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
767 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
770 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
773 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
777 * 0 same, or first was empty, and second was copied
778 * 1 second had wrong number
782 struct intel_super
*first
= st
->sb
;
783 struct intel_super
*sec
= tst
->sb
;
791 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
794 /* if an anchor does not have num_raid_devs set then it is a free
797 if (first
->anchor
->num_raid_devs
> 0 &&
798 sec
->anchor
->num_raid_devs
> 0) {
799 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
803 /* if 'first' is a spare promote it to a populated mpb with sec's
806 if (first
->anchor
->num_raid_devs
== 0 &&
807 sec
->anchor
->num_raid_devs
> 0) {
808 first
->anchor
->num_raid_devs
= sec
->anchor
->num_raid_devs
;
809 first
->anchor
->family_num
= sec
->anchor
->family_num
;
815 static void fd2devname(int fd
, char *name
)
824 if (fstat(fd
, &st
) != 0)
826 sprintf(path
, "/sys/dev/block/%d:%d",
827 major(st
.st_rdev
), minor(st
.st_rdev
));
829 rv
= readlink(path
, dname
, sizeof(dname
));
834 nm
= strrchr(dname
, '/');
836 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
840 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
842 static int imsm_read_serial(int fd
, char *devname
,
843 __u8 serial
[MAX_RAID_SERIAL_LEN
])
845 unsigned char scsi_serial
[255];
850 memset(scsi_serial
, 0, sizeof(scsi_serial
));
852 if (imsm_env_devname_as_serial()) {
853 char name
[MAX_RAID_SERIAL_LEN
];
855 fd2devname(fd
, name
);
856 strcpy((char *) serial
, name
);
860 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
865 Name
": Failed to retrieve serial for %s\n",
870 rsp_len
= scsi_serial
[3];
871 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
872 if (!isspace(scsi_serial
[4 + i
]))
873 serial
[cnt
++] = scsi_serial
[4 + i
];
874 if (cnt
== MAX_RAID_SERIAL_LEN
)
878 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
884 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
891 __u8 serial
[MAX_RAID_SERIAL_LEN
];
893 rv
= imsm_read_serial(fd
, devname
, serial
);
898 /* check if this is a disk we have seen before. it may be a spare in
899 * super->disks while the current anchor believes it is a raid member,
900 * check if we need to update dl->index
902 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
903 if (memcmp(dl
->serial
, serial
, MAX_RAID_SERIAL_LEN
) == 0)
907 dl
= malloc(sizeof(*dl
));
914 Name
": failed to allocate disk buffer for %s\n",
921 dl
->major
= major(stb
.st_rdev
);
922 dl
->minor
= minor(stb
.st_rdev
);
923 dl
->next
= super
->disks
;
924 dl
->fd
= keep_fd
? fd
: -1;
925 dl
->devname
= devname
? strdup(devname
) : NULL
;
926 strncpy((char *) dl
->serial
, (char *) serial
, MAX_RAID_SERIAL_LEN
);
928 } else if (keep_fd
) {
933 /* look up this disk's index in the current anchor */
934 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
935 struct imsm_disk
*disk_iter
;
937 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
939 if (memcmp(disk_iter
->serial
, dl
->serial
,
940 MAX_RAID_SERIAL_LEN
) == 0) {
943 dl
->disk
= *disk_iter
;
944 status
= __le32_to_cpu(dl
->disk
.status
);
945 /* only set index on disks that are a member of a
946 * populated contianer, i.e. one with raid_devs
948 if (status
& FAILED_DISK
)
950 else if (status
& SPARE_DISK
)
965 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
967 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
970 /* When migrating map0 contains the 'destination' state while map1
971 * contains the current state. When not migrating map0 contains the
972 * current state. This routine assumes that map[0].map_state is set to
973 * the current array state before being called.
975 * Migration is indicated by one of the following states
976 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
977 * 2/ Initialize (migr_state=1 migr_type=0 map0state=normal
978 * map1state=unitialized)
979 * 3/ Verify (Resync) (migr_state=1 migr_type=1 map0state=normal
981 * 4/ Rebuild (migr_state=1 migr_type=1 map0state=normal
982 * map1state=degraded)
984 static void migrate(struct imsm_dev
*dev
, __u8 to_state
, int rebuild_resync
)
986 struct imsm_map
*dest
;
987 struct imsm_map
*src
= get_imsm_map(dev
, 0);
989 dev
->vol
.migr_state
= 1;
990 dev
->vol
.migr_type
= rebuild_resync
;
991 dest
= get_imsm_map(dev
, 1);
993 memcpy(dest
, src
, sizeof_imsm_map(src
));
994 src
->map_state
= to_state
;
997 static int parse_raid_devices(struct intel_super
*super
)
1000 struct imsm_dev
*dev_new
;
1001 size_t len
, len_migr
;
1002 size_t space_needed
= 0;
1003 struct imsm_super
*mpb
= super
->anchor
;
1005 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
1006 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
1008 len
= sizeof_imsm_dev(dev_iter
, 0);
1009 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
1011 space_needed
+= len_migr
- len
;
1013 dev_new
= malloc(len_migr
);
1016 imsm_copy_dev(dev_new
, dev_iter
);
1017 super
->dev_tbl
[i
] = dev_new
;
1020 /* ensure that super->buf is large enough when all raid devices
1023 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
1026 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
1027 if (posix_memalign(&buf
, 512, len
) != 0)
1030 memcpy(buf
, super
->buf
, len
);
1039 /* retrieve a pointer to the bbm log which starts after all raid devices */
1040 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
1044 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
1046 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
1052 static void __free_imsm(struct intel_super
*super
, int free_disks
);
1054 /* load_imsm_mpb - read matrix metadata
1055 * allocates super->mpb to be freed by free_super
1057 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
1059 unsigned long long dsize
;
1060 unsigned long long sectors
;
1062 struct imsm_super
*anchor
;
1066 get_dev_size(fd
, NULL
, &dsize
);
1068 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
1071 Name
": Cannot seek to anchor block on %s: %s\n",
1072 devname
, strerror(errno
));
1076 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
1079 Name
": Failed to allocate imsm anchor buffer"
1080 " on %s\n", devname
);
1083 if (read(fd
, anchor
, 512) != 512) {
1086 Name
": Cannot read anchor block on %s: %s\n",
1087 devname
, strerror(errno
));
1092 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1095 Name
": no IMSM anchor on %s\n", devname
);
1100 __free_imsm(super
, 0);
1101 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1102 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1105 Name
": unable to allocate %zu byte mpb buffer\n",
1110 memcpy(super
->buf
, anchor
, 512);
1112 sectors
= mpb_sectors(anchor
) - 1;
1115 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1117 rc
= parse_raid_devices(super
);
1121 /* read the extended mpb */
1122 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1125 Name
": Cannot seek to extended mpb on %s: %s\n",
1126 devname
, strerror(errno
));
1130 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1133 Name
": Cannot read extended mpb on %s: %s\n",
1134 devname
, strerror(errno
));
1138 check_sum
= __gen_imsm_checksum(super
->anchor
);
1139 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1142 Name
": IMSM checksum %x != %x on %s\n",
1143 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1148 /* FIXME the BBM log is disk specific so we cannot use this global
1149 * buffer for all disks. Ok for now since we only look at the global
1150 * bbm_log_size parameter to gate assembly
1152 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1154 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1156 rc
= parse_raid_devices(super
);
1161 static void __free_imsm_disk(struct dl
*d
)
1170 static void free_imsm_disks(struct intel_super
*super
)
1172 while (super
->disks
) {
1173 struct dl
*d
= super
->disks
;
1175 super
->disks
= d
->next
;
1176 __free_imsm_disk(d
);
1180 /* free all the pieces hanging off of a super pointer */
1181 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1190 free_imsm_disks(super
);
1191 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1192 if (super
->dev_tbl
[i
]) {
1193 free(super
->dev_tbl
[i
]);
1194 super
->dev_tbl
[i
] = NULL
;
1198 static void free_imsm(struct intel_super
*super
)
1200 __free_imsm(super
, 1);
1204 static void free_super_imsm(struct supertype
*st
)
1206 struct intel_super
*super
= st
->sb
;
1215 static struct intel_super
*alloc_super(int creating_imsm
)
1217 struct intel_super
*super
= malloc(sizeof(*super
));
1220 memset(super
, 0, sizeof(*super
));
1221 super
->creating_imsm
= creating_imsm
;
1222 super
->current_vol
= -1;
1229 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1230 char *devname
, int keep_fd
)
1233 struct intel_super
*super
;
1234 struct mdinfo
*sd
, *best
= NULL
;
1241 /* check if this disk is a member of an active array */
1242 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1246 if (sra
->array
.major_version
!= -1 ||
1247 sra
->array
.minor_version
!= -2 ||
1248 strcmp(sra
->text_version
, "imsm") != 0)
1251 super
= alloc_super(0);
1255 /* find the most up to date disk in this array, skipping spares */
1256 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1257 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1258 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1263 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1267 if (super
->anchor
->num_raid_devs
== 0)
1270 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1271 if (!best
|| gen
> bestgen
) {
1286 /* load the most up to date anchor */
1287 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1288 dfd
= dev_open(nm
, O_RDONLY
);
1293 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1300 /* re-parse the disk list with the current anchor */
1301 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1302 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1303 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1308 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1313 if (st
->subarray
[0]) {
1314 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1315 super
->current_vol
= atoi(st
->subarray
);
1321 st
->container_dev
= fd2devnum(fd
);
1322 if (st
->ss
== NULL
) {
1323 st
->ss
= &super_imsm
;
1324 st
->minor_version
= 0;
1325 st
->max_devs
= IMSM_MAX_DEVICES
;
1332 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1334 struct intel_super
*super
;
1338 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1341 if (st
->subarray
[0])
1342 return 1; /* FIXME */
1344 super
= alloc_super(0);
1347 Name
": malloc of %zu failed.\n",
1352 rv
= load_imsm_mpb(fd
, super
, devname
);
1357 Name
": Failed to load all information "
1358 "sections on %s\n", devname
);
1364 if (st
->ss
== NULL
) {
1365 st
->ss
= &super_imsm
;
1366 st
->minor_version
= 0;
1367 st
->max_devs
= IMSM_MAX_DEVICES
;
1373 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1375 if (info
->level
== 1)
1377 return info
->chunk_size
>> 9;
1380 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1384 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1385 if (info
->level
== 1)
1391 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1393 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1396 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1397 unsigned long long size
, char *name
,
1398 char *homehost
, int *uuid
)
1400 /* We are creating a volume inside a pre-existing container.
1401 * so st->sb is already set.
1403 struct intel_super
*super
= st
->sb
;
1404 struct imsm_super
*mpb
= super
->anchor
;
1405 struct imsm_dev
*dev
;
1406 struct imsm_vol
*vol
;
1407 struct imsm_map
*map
;
1408 int idx
= mpb
->num_raid_devs
;
1410 unsigned long long array_blocks
;
1412 size_t size_old
, size_new
;
1414 if (mpb
->num_raid_devs
>= 2) {
1415 fprintf(stderr
, Name
": This imsm-container already has the "
1416 "maximum of 2 volumes\n");
1420 /* ensure the mpb is large enough for the new data */
1421 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1422 size_new
= disks_to_mpb_size(info
->nr_disks
);
1423 if (size_new
> size_old
) {
1425 size_t size_round
= ROUND_UP(size_new
, 512);
1427 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1428 fprintf(stderr
, Name
": could not allocate new mpb\n");
1431 memcpy(mpb_new
, mpb
, size_old
);
1434 super
->anchor
= mpb_new
;
1435 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1436 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1438 super
->current_vol
= idx
;
1439 /* when creating the first raid device in this container set num_disks
1440 * to zero, i.e. delete this spare and add raid member devices in
1441 * add_to_super_imsm_volume()
1443 if (super
->current_vol
== 0)
1445 sprintf(st
->subarray
, "%d", idx
);
1446 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1448 fprintf(stderr
, Name
": could not allocate raid device\n");
1451 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1452 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1453 info
->layout
, info
->chunk_size
,
1455 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1456 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1457 dev
->status
= __cpu_to_le32(0);
1458 dev
->reserved_blocks
= __cpu_to_le32(0);
1460 vol
->migr_state
= 0;
1463 for (i
= 0; i
< idx
; i
++) {
1464 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1465 struct imsm_map
*pmap
= get_imsm_map(prev
, 0);
1467 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1468 offset
+= IMSM_RESERVED_SECTORS
;
1470 map
= get_imsm_map(dev
, 0);
1471 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1472 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1473 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1474 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1475 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1476 IMSM_T_STATE_NORMAL
;
1478 if (info
->level
== 1 && info
->raid_disks
> 2) {
1479 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1480 "in a raid1 volume\n");
1483 if (info
->level
== 10)
1484 map
->raid_level
= 1;
1486 map
->raid_level
= info
->level
;
1488 map
->num_members
= info
->raid_disks
;
1489 for (i
= 0; i
< map
->num_members
; i
++) {
1490 /* initialized in add_to_super */
1491 set_imsm_ord_tbl_ent(map
, i
, 0);
1493 mpb
->num_raid_devs
++;
1494 super
->dev_tbl
[super
->current_vol
] = dev
;
1499 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1500 unsigned long long size
, char *name
,
1501 char *homehost
, int *uuid
)
1503 /* This is primarily called by Create when creating a new array.
1504 * We will then get add_to_super called for each component, and then
1505 * write_init_super called to write it out to each device.
1506 * For IMSM, Create can create on fresh devices or on a pre-existing
1508 * To create on a pre-existing array a different method will be called.
1509 * This one is just for fresh drives.
1511 struct intel_super
*super
;
1512 struct imsm_super
*mpb
;
1520 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1523 super
= alloc_super(1);
1526 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1527 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1532 memset(mpb
, 0, mpb_size
);
1534 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1535 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1536 strlen(MPB_VERSION_RAID5
));
1537 mpb
->mpb_size
= mpb_size
;
1543 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1544 int fd
, char *devname
)
1546 struct intel_super
*super
= st
->sb
;
1547 struct imsm_super
*mpb
= super
->anchor
;
1549 struct imsm_dev
*dev
;
1550 struct imsm_map
*map
;
1553 dev
= get_imsm_dev(super
, super
->current_vol
);
1554 map
= get_imsm_map(dev
, 0);
1556 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1557 if (dl
->major
== dk
->major
&&
1558 dl
->minor
== dk
->minor
)
1561 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1564 /* add a pristine spare to the metadata */
1565 if (dl
->index
< 0) {
1566 dl
->index
= super
->anchor
->num_disks
;
1567 super
->anchor
->num_disks
++;
1569 set_imsm_ord_tbl_ent(map
, dk
->number
, dl
->index
);
1570 status
= CONFIGURED_DISK
| USABLE_DISK
;
1571 dl
->disk
.status
= __cpu_to_le32(status
);
1573 /* if we are creating the first raid device update the family number */
1574 if (super
->current_vol
== 0) {
1576 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
1577 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
1581 sum
= __gen_imsm_checksum(mpb
);
1582 mpb
->family_num
= __cpu_to_le32(sum
);
1586 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1587 int fd
, char *devname
)
1589 struct intel_super
*super
= st
->sb
;
1591 unsigned long long size
;
1596 if (super
->current_vol
>= 0) {
1597 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1602 dd
= malloc(sizeof(*dd
));
1605 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1608 memset(dd
, 0, sizeof(*dd
));
1609 dd
->major
= major(stb
.st_rdev
);
1610 dd
->minor
= minor(stb
.st_rdev
);
1612 dd
->devname
= devname
? strdup(devname
) : NULL
;
1614 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1617 Name
": failed to retrieve scsi serial, aborting\n");
1622 get_dev_size(fd
, NULL
, &size
);
1624 status
= USABLE_DISK
| SPARE_DISK
;
1625 strcpy((char *) dd
->disk
.serial
, (char *) dd
->serial
);
1626 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
1627 dd
->disk
.status
= __cpu_to_le32(status
);
1628 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1629 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
1631 dd
->disk
.scsi_id
= __cpu_to_le32(0);
1633 if (st
->update_tail
) {
1634 dd
->next
= super
->add
;
1637 dd
->next
= super
->disks
;
1642 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1644 /* spare records have their own family number and do not have any defined raid
1647 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
1649 struct imsm_super mpb_save
;
1650 struct imsm_super
*mpb
= super
->anchor
;
1655 mpb
->num_raid_devs
= 0;
1657 mpb
->mpb_size
= sizeof(struct imsm_super
);
1658 mpb
->generation_num
= __cpu_to_le32(1UL);
1660 for (d
= super
->disks
; d
; d
= d
->next
) {
1664 mpb
->disk
[0] = d
->disk
;
1665 sum
= __gen_imsm_checksum(mpb
);
1666 mpb
->family_num
= __cpu_to_le32(sum
);
1667 sum
= __gen_imsm_checksum(mpb
);
1668 mpb
->check_sum
= __cpu_to_le32(sum
);
1670 if (store_imsm_mpb(d
->fd
, super
)) {
1671 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1672 __func__
, d
->major
, d
->minor
, strerror(errno
));
1686 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1688 struct imsm_super
*mpb
= super
->anchor
;
1694 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
1696 /* 'generation' is incremented everytime the metadata is written */
1697 generation
= __le32_to_cpu(mpb
->generation_num
);
1699 mpb
->generation_num
= __cpu_to_le32(generation
);
1701 for (d
= super
->disks
; d
; d
= d
->next
) {
1705 mpb
->disk
[d
->index
] = d
->disk
;
1706 mpb_size
+= sizeof(struct imsm_disk
);
1710 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1711 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1713 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1714 mpb_size
+= sizeof_imsm_dev(dev
, 0);
1716 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
1717 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
1719 /* recalculate checksum */
1720 sum
= __gen_imsm_checksum(mpb
);
1721 mpb
->check_sum
= __cpu_to_le32(sum
);
1723 /* write the mpb for disks that compose raid devices */
1724 for (d
= super
->disks
; d
; d
= d
->next
) {
1727 if (store_imsm_mpb(d
->fd
, super
))
1728 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1729 __func__
, d
->major
, d
->minor
, strerror(errno
));
1737 return write_super_imsm_spares(super
, doclose
);
1742 static int create_array(struct supertype
*st
)
1745 struct imsm_update_create_array
*u
;
1746 struct intel_super
*super
= st
->sb
;
1747 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
1749 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0);
1752 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1757 u
->type
= update_create_array
;
1758 u
->dev_idx
= super
->current_vol
;
1759 imsm_copy_dev(&u
->dev
, dev
);
1760 append_metadata_update(st
, u
, len
);
1765 static int add_disk(struct supertype
*st
)
1767 struct intel_super
*super
= st
->sb
;
1769 struct imsm_update_add_disk
*u
;
1777 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1782 u
->type
= update_add_disk
;
1783 append_metadata_update(st
, u
, len
);
1788 static int write_init_super_imsm(struct supertype
*st
)
1790 if (st
->update_tail
) {
1791 /* queue the recently created array / added disk
1792 * as a metadata update */
1793 struct intel_super
*super
= st
->sb
;
1797 /* determine if we are creating a volume or adding a disk */
1798 if (super
->current_vol
< 0) {
1799 /* in the add disk case we are running in mdmon
1800 * context, so don't close fd's
1802 return add_disk(st
);
1804 rv
= create_array(st
);
1806 for (d
= super
->disks
; d
; d
= d
->next
) {
1813 return write_super_imsm(st
->sb
, 1);
1816 static int store_zero_imsm(struct supertype
*st
, int fd
)
1818 unsigned long long dsize
;
1821 get_dev_size(fd
, NULL
, &dsize
);
1823 /* first block is stored on second to last sector of the disk */
1824 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1827 if (posix_memalign(&buf
, 512, 512) != 0)
1830 memset(buf
, 0, 512);
1831 if (write(fd
, buf
, 512) != 512)
1836 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1837 int layout
, int raiddisks
, int chunk
,
1838 unsigned long long size
, char *dev
,
1839 unsigned long long *freesize
,
1843 unsigned long long ldsize
;
1845 if (level
!= LEVEL_CONTAINER
)
1850 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1853 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1854 dev
, strerror(errno
));
1857 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1863 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1868 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1869 * FIX ME add ahci details
1871 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1872 int layout
, int raiddisks
, int chunk
,
1873 unsigned long long size
, char *dev
,
1874 unsigned long long *freesize
,
1878 struct intel_super
*super
= st
->sb
;
1880 unsigned long long pos
= 0;
1881 unsigned long long maxsize
;
1885 if (level
== LEVEL_CONTAINER
)
1888 if (level
== 1 && raiddisks
> 2) {
1890 fprintf(stderr
, Name
": imsm does not support more "
1891 "than 2 in a raid1 configuration\n");
1895 /* We must have the container info already read in. */
1900 /* General test: make sure there is space for
1901 * 'raiddisks' device extents of size 'size' at a given
1904 unsigned long long minsize
= size
*2 /* convert to blocks */;
1905 unsigned long long start_offset
= ~0ULL;
1908 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1909 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1914 e
= get_extents(super
, dl
);
1917 unsigned long long esize
;
1918 esize
= e
[i
].start
- pos
;
1919 if (esize
>= minsize
)
1921 if (found
&& start_offset
== ~0ULL) {
1924 } else if (found
&& pos
!= start_offset
) {
1928 pos
= e
[i
].start
+ e
[i
].size
;
1930 } while (e
[i
-1].size
);
1935 if (dcnt
< raiddisks
) {
1937 fprintf(stderr
, Name
": imsm: Not enough "
1938 "devices with space for this array "
1945 /* This device must be a member of the set */
1946 if (stat(dev
, &stb
) < 0)
1948 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1950 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1951 if (dl
->major
== major(stb
.st_rdev
) &&
1952 dl
->minor
== minor(stb
.st_rdev
))
1957 fprintf(stderr
, Name
": %s is not in the "
1958 "same imsm set\n", dev
);
1961 e
= get_extents(super
, dl
);
1965 unsigned long long esize
;
1966 esize
= e
[i
].start
- pos
;
1967 if (esize
>= maxsize
)
1969 pos
= e
[i
].start
+ e
[i
].size
;
1971 } while (e
[i
-1].size
);
1972 *freesize
= maxsize
;
1977 int imsm_bbm_log_size(struct imsm_super
*mpb
)
1979 return __le32_to_cpu(mpb
->bbm_log_size
);
1982 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1983 int raiddisks
, int chunk
, unsigned long long size
,
1984 char *dev
, unsigned long long *freesize
,
1990 /* if given unused devices create a container
1991 * if given given devices in a container create a member volume
1993 if (level
== LEVEL_CONTAINER
) {
1994 /* Must be a fresh device to add to a container */
1995 return validate_geometry_imsm_container(st
, level
, layout
,
1996 raiddisks
, chunk
, size
,
2002 /* creating in a given container */
2003 return validate_geometry_imsm_volume(st
, level
, layout
,
2004 raiddisks
, chunk
, size
,
2005 dev
, freesize
, verbose
);
2008 /* limit creation to the following levels */
2020 /* This device needs to be a device in an 'imsm' container */
2021 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2025 Name
": Cannot create this array on device %s\n",
2030 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
2032 fprintf(stderr
, Name
": Cannot open %s: %s\n",
2033 dev
, strerror(errno
));
2036 /* Well, it is in use by someone, maybe an 'imsm' container. */
2037 cfd
= open_container(fd
);
2041 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
2045 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
2047 if (sra
&& sra
->array
.major_version
== -1 &&
2048 strcmp(sra
->text_version
, "imsm") == 0) {
2049 /* This is a member of a imsm container. Load the container
2050 * and try to create a volume
2052 struct intel_super
*super
;
2054 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
2056 st
->container_dev
= fd2devnum(cfd
);
2058 return validate_geometry_imsm_volume(st
, level
, layout
,
2064 } else /* may belong to another container */
2070 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
2072 /* Given a container loaded by load_super_imsm_all,
2073 * extract information about all the arrays into
2076 * For each imsm_dev create an mdinfo, fill it in,
2077 * then look for matching devices in super->disks
2078 * and create appropriate device mdinfo.
2080 struct intel_super
*super
= st
->sb
;
2081 struct imsm_super
*mpb
= super
->anchor
;
2082 struct mdinfo
*rest
= NULL
;
2085 /* do not assemble arrays that might have bad blocks */
2086 if (imsm_bbm_log_size(super
->anchor
)) {
2087 fprintf(stderr
, Name
": BBM log found in metadata. "
2088 "Cannot activate array(s).\n");
2092 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2093 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
2094 struct imsm_vol
*vol
= &dev
->vol
;
2095 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2096 struct mdinfo
*this;
2099 this = malloc(sizeof(*this));
2100 memset(this, 0, sizeof(*this));
2103 this->array
.level
= get_imsm_raid_level(map
);
2104 this->array
.raid_disks
= map
->num_members
;
2105 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
2106 this->array
.md_minor
= -1;
2107 this->array
.ctime
= 0;
2108 this->array
.utime
= 0;
2109 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
2110 this->array
.state
= !vol
->dirty
;
2111 this->container_member
= i
;
2112 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
||
2113 dev
->vol
.dirty
|| dev
->vol
.migr_state
)
2114 this->resync_start
= 0;
2116 this->resync_start
= ~0ULL;
2118 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
2119 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
2121 sprintf(this->text_version
, "/%s/%d",
2122 devnum2devname(st
->container_dev
),
2123 this->container_member
);
2125 memset(this->uuid
, 0, sizeof(this->uuid
));
2127 this->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2129 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
2130 struct mdinfo
*info_d
;
2138 idx
= get_imsm_disk_idx(dev
, slot
);
2139 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
2140 for (d
= super
->disks
; d
; d
= d
->next
)
2141 if (d
->index
== idx
)
2147 s
= d
? __le32_to_cpu(d
->disk
.status
) : 0;
2148 if (s
& FAILED_DISK
)
2150 if (!(s
& USABLE_DISK
))
2152 if (ord
& IMSM_ORD_REBUILD
)
2156 * if we skip some disks the array will be assmebled degraded;
2157 * reset resync start to avoid a dirty-degraded situation
2159 * FIXME handle dirty degraded
2161 if (skip
&& !dev
->vol
.dirty
)
2162 this->resync_start
= ~0ULL;
2166 info_d
= malloc(sizeof(*info_d
));
2168 fprintf(stderr
, Name
": failed to allocate disk"
2169 " for volume %s\n", (char *) dev
->volume
);
2174 memset(info_d
, 0, sizeof(*info_d
));
2175 info_d
->next
= this->devs
;
2176 this->devs
= info_d
;
2178 info_d
->disk
.number
= d
->index
;
2179 info_d
->disk
.major
= d
->major
;
2180 info_d
->disk
.minor
= d
->minor
;
2181 info_d
->disk
.raid_disk
= slot
;
2183 this->array
.working_disks
++;
2185 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
2186 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2187 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2189 strcpy(info_d
->name
, d
->devname
);
2198 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
2201 struct intel_super
*super
= c
->sb
;
2202 struct imsm_super
*mpb
= super
->anchor
;
2204 if (atoi(inst
) >= mpb
->num_raid_devs
) {
2205 fprintf(stderr
, "%s: subarry index %d, out of range\n",
2206 __func__
, atoi(inst
));
2210 dprintf("imsm: open_new %s\n", inst
);
2211 a
->info
.container_member
= atoi(inst
);
2215 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
, int failed
)
2217 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2220 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
2221 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
2223 switch (get_imsm_raid_level(map
)) {
2225 return IMSM_T_STATE_FAILED
;
2228 if (failed
< map
->num_members
)
2229 return IMSM_T_STATE_DEGRADED
;
2231 return IMSM_T_STATE_FAILED
;
2236 * check to see if any mirrors have failed,
2237 * otherwise we are degraded
2239 int device_per_mirror
= 2; /* FIXME is this always the case?
2240 * and are they always adjacent?
2245 for (i
= 0; i
< map
->num_members
; i
++) {
2246 int idx
= get_imsm_disk_idx(dev
, i
);
2247 struct imsm_disk
*disk
= get_imsm_disk(super
, idx
);
2251 else if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2254 if (r10fail
>= device_per_mirror
)
2255 return IMSM_T_STATE_FAILED
;
2257 /* reset 'r10fail' for next mirror set */
2258 if (!((i
+ 1) % device_per_mirror
))
2262 return IMSM_T_STATE_DEGRADED
;
2266 return IMSM_T_STATE_DEGRADED
;
2268 return IMSM_T_STATE_FAILED
;
2274 return map
->map_state
;
2277 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
)
2281 struct imsm_disk
*disk
;
2282 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2284 for (i
= 0; i
< map
->num_members
; i
++) {
2285 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
2286 int idx
= ord_to_idx(ord
);
2288 disk
= get_imsm_disk(super
, idx
);
2290 __le32_to_cpu(disk
->status
) & FAILED_DISK
||
2291 ord
& IMSM_ORD_REBUILD
)
2298 static int is_resyncing(struct imsm_dev
*dev
)
2300 struct imsm_map
*migr_map
;
2302 if (!dev
->vol
.migr_state
)
2305 if (dev
->vol
.migr_type
== 0)
2308 migr_map
= get_imsm_map(dev
, 1);
2310 if (migr_map
->map_state
== IMSM_T_STATE_NORMAL
)
2316 static int is_rebuilding(struct imsm_dev
*dev
)
2318 struct imsm_map
*migr_map
;
2320 if (!dev
->vol
.migr_state
)
2323 if (dev
->vol
.migr_type
== 0)
2326 migr_map
= get_imsm_map(dev
, 1);
2328 if (migr_map
->map_state
== IMSM_T_STATE_DEGRADED
)
2334 /* Handle dirty -> clean transititions and resync. Degraded and rebuild
2335 * states are handled in imsm_set_disk() with one exception, when a
2336 * resync is stopped due to a new failure this routine will set the
2337 * 'degraded' state for the array.
2339 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
2341 int inst
= a
->info
.container_member
;
2342 struct intel_super
*super
= a
->container
->sb
;
2343 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2344 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2345 int failed
= imsm_count_failed(super
, dev
);
2346 __u8 map_state
= imsm_check_degraded(super
, dev
, failed
);
2348 if (consistent
== 2 &&
2349 (a
->resync_start
!= ~0ULL ||
2350 map_state
!= IMSM_T_STATE_NORMAL
||
2351 dev
->vol
.migr_state
))
2354 if (a
->resync_start
== ~0ULL) {
2355 /* complete intialization / resync,
2356 * recovery is completed in ->set_disk
2358 if (is_resyncing(dev
)) {
2359 dprintf("imsm: mark resync done\n");
2360 dev
->vol
.migr_state
= 0;
2361 map
->map_state
= map_state
;
2362 super
->updates_pending
++;
2364 } else if (!is_resyncing(dev
) && !failed
) {
2365 /* mark the start of the init process if nothing is failed */
2366 dprintf("imsm: mark resync start (%llu)\n", a
->resync_start
);
2367 map
->map_state
= map_state
;
2368 migrate(dev
, IMSM_T_STATE_NORMAL
,
2369 map
->map_state
== IMSM_T_STATE_NORMAL
);
2370 super
->updates_pending
++;
2373 /* mark dirty / clean */
2374 if (dev
->vol
.dirty
!= !consistent
) {
2375 dprintf("imsm: mark '%s' (%llu)\n",
2376 consistent
? "clean" : "dirty", a
->resync_start
);
2381 super
->updates_pending
++;
2386 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2388 int inst
= a
->info
.container_member
;
2389 struct intel_super
*super
= a
->container
->sb
;
2390 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2391 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2392 struct imsm_disk
*disk
;
2398 if (n
> map
->num_members
)
2399 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2400 n
, map
->num_members
- 1);
2405 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2407 ord
= get_imsm_ord_tbl_ent(dev
, n
);
2408 disk
= get_imsm_disk(super
, ord_to_idx(ord
));
2410 /* check for new failures */
2411 status
= __le32_to_cpu(disk
->status
);
2412 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2413 status
|= FAILED_DISK
;
2414 disk
->status
= __cpu_to_le32(status
);
2415 disk
->scsi_id
= __cpu_to_le32(~0UL);
2416 memmove(&disk
->serial
[0], &disk
->serial
[1], MAX_RAID_SERIAL_LEN
- 1);
2417 super
->updates_pending
++;
2419 /* check if in_sync */
2420 if (state
& DS_INSYNC
&& ord
& IMSM_ORD_REBUILD
) {
2421 struct imsm_map
*migr_map
= get_imsm_map(dev
, 1);
2423 set_imsm_ord_tbl_ent(migr_map
, n
, ord_to_idx(ord
));
2424 super
->updates_pending
++;
2427 failed
= imsm_count_failed(super
, dev
);
2428 map_state
= imsm_check_degraded(super
, dev
, failed
);
2430 /* check if recovery complete, newly degraded, or failed */
2431 if (map_state
== IMSM_T_STATE_NORMAL
&& is_rebuilding(dev
)) {
2432 map
->map_state
= map_state
;
2433 dev
->vol
.migr_state
= 0;
2434 super
->updates_pending
++;
2435 } else if (map_state
== IMSM_T_STATE_DEGRADED
&&
2436 map
->map_state
!= map_state
&&
2437 !dev
->vol
.migr_state
) {
2438 dprintf("imsm: mark degraded\n");
2439 map
->map_state
= map_state
;
2440 super
->updates_pending
++;
2441 } else if (map_state
== IMSM_T_STATE_FAILED
&&
2442 map
->map_state
!= map_state
) {
2443 dprintf("imsm: mark failed\n");
2444 dev
->vol
.migr_state
= 0;
2445 map
->map_state
= map_state
;
2446 super
->updates_pending
++;
2450 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2452 struct imsm_super
*mpb
= super
->anchor
;
2453 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2454 unsigned long long dsize
;
2455 unsigned long long sectors
;
2457 get_dev_size(fd
, NULL
, &dsize
);
2459 if (mpb_size
> 512) {
2460 /* -1 to account for anchor */
2461 sectors
= mpb_sectors(mpb
) - 1;
2463 /* write the extended mpb to the sectors preceeding the anchor */
2464 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2467 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2471 /* first block is stored on second to last sector of the disk */
2472 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2475 if (write(fd
, super
->buf
, 512) != 512)
2481 static void imsm_sync_metadata(struct supertype
*container
)
2483 struct intel_super
*super
= container
->sb
;
2485 if (!super
->updates_pending
)
2488 write_super_imsm(super
, 0);
2490 super
->updates_pending
= 0;
2493 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
2495 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2496 int i
= get_imsm_disk_idx(dev
, idx
);
2499 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2503 if (dl
&& __le32_to_cpu(dl
->disk
.status
) & FAILED_DISK
)
2507 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
2512 static struct dl
*imsm_add_spare(struct intel_super
*super
, int idx
, struct active_array
*a
)
2514 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
2515 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2516 unsigned long long esize
;
2517 unsigned long long pos
;
2526 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2527 /* If in this array, skip */
2528 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2529 if (d
->disk
.major
== dl
->major
&&
2530 d
->disk
.minor
== dl
->minor
) {
2531 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2537 /* skip marked in use or failed drives */
2538 status
= __le32_to_cpu(dl
->disk
.status
);
2539 if (status
& FAILED_DISK
|| status
& CONFIGURED_DISK
) {
2540 dprintf("%x:%x status ( %s%s)\n",
2541 dl
->major
, dl
->minor
,
2542 status
& FAILED_DISK
? "failed " : "",
2543 status
& CONFIGURED_DISK
? "configured " : "");
2547 /* Does this unused device have the requisite free space?
2548 * We need a->info.component_size sectors
2550 ex
= get_extents(super
, dl
);
2552 dprintf("cannot get extents\n");
2558 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2561 /* check that we can start at pba_of_lba0 with
2562 * a->info.component_size of space
2564 esize
= ex
[j
].start
- pos
;
2565 if (array_start
>= pos
&&
2566 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2570 pos
= ex
[j
].start
+ ex
[j
].size
;
2573 } while (ex
[j
-1].size
);
2577 dprintf("%x:%x does not have %llu at %d\n",
2578 dl
->major
, dl
->minor
,
2579 a
->info
.component_size
,
2580 __le32_to_cpu(map
->pba_of_lba0
));
2590 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2591 struct metadata_update
**updates
)
2594 * Find a device with unused free space and use it to replace a
2595 * failed/vacant region in an array. We replace failed regions one a
2596 * array at a time. The result is that a new spare disk will be added
2597 * to the first failed array and after the monitor has finished
2598 * propagating failures the remainder will be consumed.
2600 * FIXME add a capability for mdmon to request spares from another
2604 struct intel_super
*super
= a
->container
->sb
;
2605 int inst
= a
->info
.container_member
;
2606 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2607 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2608 int failed
= a
->info
.array
.raid_disks
;
2609 struct mdinfo
*rv
= NULL
;
2612 struct metadata_update
*mu
;
2614 struct imsm_update_activate_spare
*u
;
2618 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2619 if ((d
->curr_state
& DS_FAULTY
) &&
2621 /* wait for Removal to happen */
2623 if (d
->state_fd
>= 0)
2627 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2628 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2629 if (imsm_check_degraded(super
, dev
, failed
) != IMSM_T_STATE_DEGRADED
)
2632 /* For each slot, if it is not working, find a spare */
2633 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2634 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2635 if (d
->disk
.raid_disk
== i
)
2637 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2638 if (d
&& (d
->state_fd
>= 0))
2642 * OK, this device needs recovery. Try to re-add the previous
2643 * occupant of this slot, if this fails add a new spare
2645 dl
= imsm_readd(super
, i
, a
);
2647 dl
= imsm_add_spare(super
, i
, a
);
2651 /* found a usable disk with enough space */
2652 di
= malloc(sizeof(*di
));
2653 memset(di
, 0, sizeof(*di
));
2655 /* dl->index will be -1 in the case we are activating a
2656 * pristine spare. imsm_process_update() will create a
2657 * new index in this case. Once a disk is found to be
2658 * failed in all member arrays it is kicked from the
2661 di
->disk
.number
= dl
->index
;
2663 /* (ab)use di->devs to store a pointer to the device
2666 di
->devs
= (struct mdinfo
*) dl
;
2668 di
->disk
.raid_disk
= i
;
2669 di
->disk
.major
= dl
->major
;
2670 di
->disk
.minor
= dl
->minor
;
2672 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2673 di
->component_size
= a
->info
.component_size
;
2674 di
->container_member
= inst
;
2678 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2679 i
, di
->data_offset
);
2685 /* No spares found */
2687 /* Now 'rv' has a list of devices to return.
2688 * Create a metadata_update record to update the
2689 * disk_ord_tbl for the array
2691 mu
= malloc(sizeof(*mu
));
2692 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2694 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2695 mu
->next
= *updates
;
2696 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2698 for (di
= rv
; di
; di
= di
->next
) {
2699 u
->type
= update_activate_spare
;
2700 u
->dl
= (struct dl
*) di
->devs
;
2702 u
->slot
= di
->disk
.raid_disk
;
2713 static int disks_overlap(struct imsm_dev
*d1
, struct imsm_dev
*d2
)
2715 struct imsm_map
*m1
= get_imsm_map(d1
, 0);
2716 struct imsm_map
*m2
= get_imsm_map(d2
, 0);
2721 for (i
= 0; i
< m1
->num_members
; i
++) {
2722 idx
= get_imsm_disk_idx(d1
, i
);
2723 for (j
= 0; j
< m2
->num_members
; j
++)
2724 if (idx
== get_imsm_disk_idx(d2
, j
))
2731 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
);
2733 static void imsm_process_update(struct supertype
*st
,
2734 struct metadata_update
*update
)
2737 * crack open the metadata_update envelope to find the update record
2738 * update can be one of:
2739 * update_activate_spare - a spare device has replaced a failed
2740 * device in an array, update the disk_ord_tbl. If this disk is
2741 * present in all member arrays then also clear the SPARE_DISK
2744 struct intel_super
*super
= st
->sb
;
2745 struct imsm_super
*mpb
;
2746 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2748 /* update requires a larger buf but the allocation failed */
2749 if (super
->next_len
&& !super
->next_buf
) {
2750 super
->next_len
= 0;
2754 if (super
->next_buf
) {
2755 memcpy(super
->next_buf
, super
->buf
, super
->len
);
2757 super
->len
= super
->next_len
;
2758 super
->buf
= super
->next_buf
;
2760 super
->next_len
= 0;
2761 super
->next_buf
= NULL
;
2764 mpb
= super
->anchor
;
2767 case update_activate_spare
: {
2768 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
2769 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
2770 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2771 struct imsm_map
*migr_map
;
2772 struct active_array
*a
;
2773 struct imsm_disk
*disk
;
2779 int victim
= get_imsm_disk_idx(dev
, u
->slot
);
2782 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2787 fprintf(stderr
, "error: imsm_activate_spare passed "
2788 "an unknown disk (index: %d serial: %s)\n",
2789 u
->dl
->index
, u
->dl
->serial
);
2793 super
->updates_pending
++;
2795 /* count failures (excluding rebuilds and the victim)
2796 * to determine map[0] state
2799 for (i
= 0; i
< map
->num_members
; i
++) {
2802 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
2804 __le32_to_cpu(disk
->status
) & FAILED_DISK
)
2808 /* adding a pristine spare, assign a new index */
2809 if (dl
->index
< 0) {
2810 dl
->index
= super
->anchor
->num_disks
;
2811 super
->anchor
->num_disks
++;
2814 status
= __le32_to_cpu(disk
->status
);
2815 status
|= CONFIGURED_DISK
;
2816 status
&= ~SPARE_DISK
;
2817 disk
->status
= __cpu_to_le32(status
);
2820 to_state
= imsm_check_degraded(super
, dev
, failed
);
2821 map
->map_state
= IMSM_T_STATE_DEGRADED
;
2822 migrate(dev
, to_state
, 1);
2823 migr_map
= get_imsm_map(dev
, 1);
2824 set_imsm_ord_tbl_ent(map
, u
->slot
, dl
->index
);
2825 set_imsm_ord_tbl_ent(migr_map
, u
->slot
, dl
->index
| IMSM_ORD_REBUILD
);
2827 /* count arrays using the victim in the metadata */
2829 for (a
= st
->arrays
; a
; a
= a
->next
) {
2830 dev
= get_imsm_dev(super
, a
->info
.container_member
);
2831 for (i
= 0; i
< map
->num_members
; i
++)
2832 if (victim
== get_imsm_disk_idx(dev
, i
))
2836 /* delete the victim if it is no longer being
2842 for (dlp
= &super
->disks
; *dlp
; dlp
= &(*dlp
)->next
)
2843 if ((*dlp
)->index
== victim
)
2845 /* We know that 'manager' isn't touching anything,
2848 imsm_delete(super
, dlp
, victim
);
2852 case update_create_array
: {
2853 /* someone wants to create a new array, we need to be aware of
2854 * a few races/collisions:
2855 * 1/ 'Create' called by two separate instances of mdadm
2856 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
2857 * devices that have since been assimilated via
2859 * In the event this update can not be carried out mdadm will
2860 * (FIX ME) notice that its update did not take hold.
2862 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2863 struct imsm_dev
*dev
;
2864 struct imsm_map
*map
, *new_map
;
2865 unsigned long long start
, end
;
2866 unsigned long long new_start
, new_end
;
2870 /* handle racing creates: first come first serve */
2871 if (u
->dev_idx
< mpb
->num_raid_devs
) {
2872 dprintf("%s: subarray %d already defined\n",
2873 __func__
, u
->dev_idx
);
2877 /* check update is next in sequence */
2878 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
2879 dprintf("%s: can not create array %d expected index %d\n",
2880 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
2884 new_map
= get_imsm_map(&u
->dev
, 0);
2885 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
2886 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
2888 /* handle activate_spare versus create race:
2889 * check to make sure that overlapping arrays do not include
2892 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2893 dev
= get_imsm_dev(super
, i
);
2894 map
= get_imsm_map(dev
, 0);
2895 start
= __le32_to_cpu(map
->pba_of_lba0
);
2896 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
2897 if ((new_start
>= start
&& new_start
<= end
) ||
2898 (start
>= new_start
&& start
<= new_end
))
2900 if (overlap
&& disks_overlap(dev
, &u
->dev
)) {
2901 dprintf("%s: arrays overlap\n", __func__
);
2905 /* check num_members sanity */
2906 if (new_map
->num_members
> mpb
->num_disks
) {
2907 dprintf("%s: num_disks out of range\n", __func__
);
2911 /* check that prepare update was successful */
2912 if (!update
->space
) {
2913 dprintf("%s: prepare update failed\n", __func__
);
2917 super
->updates_pending
++;
2918 dev
= update
->space
;
2919 map
= get_imsm_map(dev
, 0);
2920 update
->space
= NULL
;
2921 imsm_copy_dev(dev
, &u
->dev
);
2922 map
= get_imsm_map(dev
, 0);
2923 super
->dev_tbl
[u
->dev_idx
] = dev
;
2924 mpb
->num_raid_devs
++;
2927 for (i
= 0; i
< map
->num_members
; i
++) {
2928 struct imsm_disk
*disk
;
2931 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
2932 status
= __le32_to_cpu(disk
->status
);
2933 status
|= CONFIGURED_DISK
;
2934 status
&= ~SPARE_DISK
;
2935 disk
->status
= __cpu_to_le32(status
);
2939 case update_add_disk
:
2941 /* we may be able to repair some arrays if disks are
2944 struct active_array
*a
;
2945 for (a
= st
->arrays
; a
; a
= a
->next
)
2946 a
->check_degraded
= 1;
2948 /* check if we can add / replace some disks in the
2950 while (super
->add
) {
2951 struct dl
**dlp
, *dl
, *al
;
2953 super
->add
= al
->next
;
2954 for (dlp
= &super
->disks
; *dlp
; ) {
2955 if (memcmp(al
->serial
, (*dlp
)->serial
,
2956 MAX_RAID_SERIAL_LEN
) == 0) {
2958 *dlp
= (*dlp
)->next
;
2959 __free_imsm_disk(dl
);
2962 dlp
= &(*dlp
)->next
;
2964 al
->next
= super
->disks
;
2972 static void imsm_prepare_update(struct supertype
*st
,
2973 struct metadata_update
*update
)
2976 * Allocate space to hold new disk entries, raid-device entries or a new
2977 * mpb if necessary. The manager synchronously waits for updates to
2978 * complete in the monitor, so new mpb buffers allocated here can be
2979 * integrated by the monitor thread without worrying about live pointers
2980 * in the manager thread.
2982 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2983 struct intel_super
*super
= st
->sb
;
2984 struct imsm_super
*mpb
= super
->anchor
;
2989 case update_create_array
: {
2990 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2992 len
= sizeof_imsm_dev(&u
->dev
, 1);
2993 update
->space
= malloc(len
);
3000 /* check if we need a larger metadata buffer */
3001 if (super
->next_buf
)
3002 buf_len
= super
->next_len
;
3004 buf_len
= super
->len
;
3006 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
3007 /* ok we need a larger buf than what is currently allocated
3008 * if this allocation fails process_update will notice that
3009 * ->next_len is set and ->next_buf is NULL
3011 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
3012 if (super
->next_buf
)
3013 free(super
->next_buf
);
3015 super
->next_len
= buf_len
;
3016 if (posix_memalign(&super
->next_buf
, buf_len
, 512) != 0)
3017 super
->next_buf
= NULL
;
3021 /* must be called while manager is quiesced */
3022 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
)
3024 struct imsm_super
*mpb
= super
->anchor
;
3026 struct imsm_dev
*dev
;
3027 struct imsm_map
*map
;
3028 int i
, j
, num_members
;
3031 dprintf("%s: deleting device[%d] from imsm_super\n",
3034 /* shift all indexes down one */
3035 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
3036 if (iter
->index
> index
)
3039 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3040 dev
= get_imsm_dev(super
, i
);
3041 map
= get_imsm_map(dev
, 0);
3042 num_members
= map
->num_members
;
3043 for (j
= 0; j
< num_members
; j
++) {
3044 /* update ord entries being careful not to propagate
3045 * ord-flags to the first map
3047 ord
= get_imsm_ord_tbl_ent(dev
, j
);
3049 if (ord_to_idx(ord
) <= index
)
3052 map
= get_imsm_map(dev
, 0);
3053 set_imsm_ord_tbl_ent(map
, j
, ord_to_idx(ord
- 1));
3054 map
= get_imsm_map(dev
, 1);
3056 set_imsm_ord_tbl_ent(map
, j
, ord
- 1);
3061 super
->updates_pending
++;
3063 struct dl
*dl
= *dlp
;
3065 *dlp
= (*dlp
)->next
;
3066 __free_imsm_disk(dl
);
3070 struct superswitch super_imsm
= {
3072 .examine_super
= examine_super_imsm
,
3073 .brief_examine_super
= brief_examine_super_imsm
,
3074 .detail_super
= detail_super_imsm
,
3075 .brief_detail_super
= brief_detail_super_imsm
,
3076 .write_init_super
= write_init_super_imsm
,
3078 .match_home
= match_home_imsm
,
3079 .uuid_from_super
= uuid_from_super_imsm
,
3080 .getinfo_super
= getinfo_super_imsm
,
3081 .update_super
= update_super_imsm
,
3083 .avail_size
= avail_size_imsm
,
3085 .compare_super
= compare_super_imsm
,
3087 .load_super
= load_super_imsm
,
3088 .init_super
= init_super_imsm
,
3089 .add_to_super
= add_to_super_imsm
,
3090 .store_super
= store_zero_imsm
,
3091 .free_super
= free_super_imsm
,
3092 .match_metadata_desc
= match_metadata_desc_imsm
,
3093 .container_content
= container_content_imsm
,
3095 .validate_geometry
= validate_geometry_imsm
,
3099 .open_new
= imsm_open_new
,
3100 .load_super
= load_super_imsm
,
3101 .set_array_state
= imsm_set_array_state
,
3102 .set_disk
= imsm_set_disk
,
3103 .sync_metadata
= imsm_sync_metadata
,
3104 .activate_spare
= imsm_activate_spare
,
3105 .process_update
= imsm_process_update
,
3106 .prepare_update
= imsm_prepare_update
,