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 __u32 disk_ord_tbl
[1]; /* disk_ord_tbl[num_members],
73 } __attribute__ ((packed
));
77 __u8 migr_state
; /* Normal or Migrating */
78 __u8 migr_type
; /* Initializing, Rebuilding, ... */
82 struct imsm_map map
[1];
83 /* here comes another one if migr_state */
84 } __attribute__ ((packed
));
87 __u8 volume
[MAX_RAID_SERIAL_LEN
];
90 __u32 status
; /* Persistent RaidDev status */
91 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
92 #define IMSM_DEV_FILLERS 12
93 __u32 filler
[IMSM_DEV_FILLERS
];
95 } __attribute__ ((packed
));
98 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
99 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
100 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
101 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
102 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
103 __u32 error_log_size
; /* 0x30 - 0x33 in bytes */
104 __u32 attributes
; /* 0x34 - 0x37 */
105 __u8 num_disks
; /* 0x38 Number of configured disks */
106 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
107 __u8 error_log_pos
; /* 0x3A */
108 __u8 fill
[1]; /* 0x3B */
109 __u32 cache_size
; /* 0x3c - 0x40 in mb */
110 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
111 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
112 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
113 #define IMSM_FILLERS 35
114 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
115 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
116 /* here comes imsm_dev[num_raid_devs] */
117 /* here comes BBM logs */
118 } __attribute__ ((packed
));
120 #define BBM_LOG_MAX_ENTRIES 254
122 struct bbm_log_entry
{
123 __u64 defective_block_start
;
124 #define UNREADABLE 0xFFFFFFFF
125 __u32 spare_block_offset
;
126 __u16 remapped_marked_count
;
128 } __attribute__ ((__packed__
));
131 __u32 signature
; /* 0xABADB10C */
133 __u32 reserved_spare_block_count
; /* 0 */
134 __u32 reserved
; /* 0xFFFF */
135 __u64 first_spare_lba
;
136 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
137 } __attribute__ ((__packed__
));
141 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
144 static unsigned int sector_count(__u32 bytes
)
146 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
149 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
151 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
154 /* internal representation of IMSM metadata */
157 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
158 struct imsm_super
*anchor
; /* immovable parameters */
160 size_t len
; /* size of the 'buf' allocation */
161 int updates_pending
; /* count of pending updates for mdmon */
162 int creating_imsm
; /* flag to indicate container creation */
163 int current_vol
; /* index of raid device undergoing creation */
164 #define IMSM_MAX_RAID_DEVS 2
165 struct imsm_dev
*dev_tbl
[IMSM_MAX_RAID_DEVS
];
169 __u8 serial
[MAX_RAID_SERIAL_LEN
];
172 struct imsm_disk disk
;
175 struct bbm_log
*bbm_log
;
179 unsigned long long start
, size
;
182 /* definition of messages passed to imsm_process_update */
183 enum imsm_update_type
{
184 update_activate_spare
,
188 struct imsm_update_activate_spare
{
189 enum imsm_update_type type
;
193 struct imsm_update_activate_spare
*next
;
196 struct imsm_update_create_array
{
197 enum imsm_update_type type
;
202 static int imsm_env_devname_as_serial(void)
204 char *val
= getenv("IMSM_DEVNAME_AS_SERIAL");
206 if (val
&& atoi(val
) == 1)
213 static struct supertype
*match_metadata_desc_imsm(char *arg
)
215 struct supertype
*st
;
217 if (strcmp(arg
, "imsm") != 0 &&
218 strcmp(arg
, "default") != 0
222 st
= malloc(sizeof(*st
));
223 memset(st
, 0, sizeof(*st
));
224 st
->ss
= &super_imsm
;
225 st
->max_devs
= IMSM_MAX_DEVICES
;
226 st
->minor_version
= 0;
231 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
233 return &mpb
->sig
[MPB_SIG_LEN
];
236 /* retrieve a disk directly from the anchor when the anchor is known to be
237 * up-to-date, currently only at load time
239 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
241 if (index
>= mpb
->num_disks
)
243 return &mpb
->disk
[index
];
246 /* retrieve a disk from the parsed metadata */
247 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
251 for (d
= super
->disks
; d
; d
= d
->next
)
252 if (d
->index
== index
)
258 /* generate a checksum directly from the anchor when the anchor is known to be
259 * up-to-date, currently only at load or write_super after coalescing
261 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
263 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
264 __u32
*p
= (__u32
*) mpb
;
268 sum
+= __le32_to_cpu(*p
++);
270 return sum
- __le32_to_cpu(mpb
->check_sum
);
273 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
)
275 size_t size
= sizeof(*dev
);
277 /* each map has disk_ord_tbl[num_members - 1] additional space */
278 size
+= sizeof(__u32
) * (dev
->vol
.map
[0].num_members
- 1);
280 /* migrating means an additional map */
281 if (dev
->vol
.migr_state
) {
282 size
+= sizeof(struct imsm_map
);
283 size
+= sizeof(__u32
) * (dev
->vol
.map
[1].num_members
- 1);
289 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
295 if (index
>= mpb
->num_raid_devs
)
298 /* devices start after all disks */
299 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
301 for (i
= 0; i
<= index
; i
++)
303 return _mpb
+ offset
;
305 offset
+= sizeof_imsm_dev(_mpb
+ offset
);
310 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
312 if (index
>= super
->anchor
->num_raid_devs
)
314 return super
->dev_tbl
[index
];
317 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
319 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
321 /* top byte is 'special' */
322 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
325 static int get_imsm_raid_level(struct imsm_map
*map
)
327 if (map
->raid_level
== 1) {
328 if (map
->num_members
== 2)
334 return map
->raid_level
;
337 static int cmp_extent(const void *av
, const void *bv
)
339 const struct extent
*a
= av
;
340 const struct extent
*b
= bv
;
341 if (a
->start
< b
->start
)
343 if (a
->start
> b
->start
)
348 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
350 /* find a list of used extents on the given physical device */
351 struct extent
*rv
, *e
;
355 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
356 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
357 struct imsm_map
*map
= dev
->vol
.map
;
359 for (j
= 0; j
< map
->num_members
; j
++) {
360 __u32 index
= get_imsm_disk_idx(map
, j
);
362 if (index
== dl
->index
)
366 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
371 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
372 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
373 struct imsm_map
*map
= dev
->vol
.map
;
375 for (j
= 0; j
< map
->num_members
; j
++) {
376 __u32 index
= get_imsm_disk_idx(map
, j
);
378 if (index
== dl
->index
) {
379 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
380 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
385 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
387 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) -
388 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
394 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
398 struct imsm_map
*map
= dev
->vol
.map
;
401 printf("[%s]:\n", dev
->volume
);
402 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
403 printf(" Members : %d\n", map
->num_members
);
404 for (slot
= 0; slot
< map
->num_members
; slot
++)
405 if (index
== get_imsm_disk_idx(map
, slot
))
407 if (slot
< map
->num_members
)
408 printf(" This Slot : %d\n", slot
);
410 printf(" This Slot : ?\n");
411 sz
= __le32_to_cpu(dev
->size_high
);
413 sz
+= __le32_to_cpu(dev
->size_low
);
414 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
415 human_size(sz
* 512));
416 sz
= __le32_to_cpu(map
->blocks_per_member
);
417 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
418 human_size(sz
* 512));
419 printf(" Sector Offset : %u\n",
420 __le32_to_cpu(map
->pba_of_lba0
));
421 printf(" Num Stripes : %u\n",
422 __le32_to_cpu(map
->num_data_stripes
));
423 printf(" Chunk Size : %u KiB\n",
424 __le16_to_cpu(map
->blocks_per_strip
) / 2);
425 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
426 printf(" Migrate State : %s\n", dev
->vol
.migr_state
? "migrating" : "idle");
427 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
428 printf(" Map State : %s\n", map_state_str
[map
->map_state
]);
431 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
433 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
434 char str
[MAX_RAID_SERIAL_LEN
];
442 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
443 printf(" Disk%02d Serial : %s\n", index
, str
);
444 s
= __le32_to_cpu(disk
->status
);
445 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
446 s
&CONFIGURED_DISK
? " active" : "",
447 s
&FAILED_DISK
? " failed" : "",
448 s
&USABLE_DISK
? " usable" : "");
449 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
450 sz
= __le32_to_cpu(disk
->total_blocks
) -
451 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
452 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
453 human_size(sz
* 512));
456 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
458 struct intel_super
*super
= st
->sb
;
459 struct imsm_super
*mpb
= super
->anchor
;
460 char str
[MAX_SIGNATURE_LENGTH
];
464 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
465 printf(" Magic : %s\n", str
);
466 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
467 printf(" Version : %s\n", get_imsm_version(mpb
));
468 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
469 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
470 sum
= __le32_to_cpu(mpb
->check_sum
);
471 printf(" Checksum : %08x %s\n", sum
,
472 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
473 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
474 printf(" Disks : %d\n", mpb
->num_disks
);
475 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
476 print_imsm_disk(mpb
, super
->disks
->index
);
477 if (super
->bbm_log
) {
478 struct bbm_log
*log
= super
->bbm_log
;
481 printf("Bad Block Management Log:\n");
482 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
483 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
484 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
485 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
486 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
488 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
489 print_imsm_dev(__get_imsm_dev(mpb
, i
), super
->disks
->index
);
490 for (i
= 0; i
< mpb
->num_disks
; i
++) {
491 if (i
== super
->disks
->index
)
493 print_imsm_disk(mpb
, i
);
497 static void brief_examine_super_imsm(struct supertype
*st
)
499 printf("ARRAY /dev/imsm metadata=imsm\n");
502 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
504 printf("%s\n", __FUNCTION__
);
507 static void brief_detail_super_imsm(struct supertype
*st
)
509 printf("%s\n", __FUNCTION__
);
513 static int match_home_imsm(struct supertype
*st
, char *homehost
)
515 printf("%s\n", __FUNCTION__
);
520 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
522 printf("%s\n", __FUNCTION__
);
527 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
529 __u8
*v
= get_imsm_version(mpb
);
530 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
531 char major
[] = { 0, 0, 0 };
532 char minor
[] = { 0 ,0, 0 };
533 char patch
[] = { 0, 0, 0 };
534 char *ver_parse
[] = { major
, minor
, patch
};
538 while (*v
!= '\0' && v
< end
) {
539 if (*v
!= '.' && j
< 2)
540 ver_parse
[i
][j
++] = *v
;
548 *m
= strtol(minor
, NULL
, 0);
549 *p
= strtol(patch
, NULL
, 0);
553 static int imsm_level_to_layout(int level
)
561 return ALGORITHM_LEFT_ASYMMETRIC
;
563 return 0x102; //FIXME is this correct?
568 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
570 struct intel_super
*super
= st
->sb
;
571 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
572 struct imsm_map
*map
= &dev
->vol
.map
[0];
574 info
->container_member
= super
->current_vol
;
575 info
->array
.raid_disks
= map
->num_members
;
576 info
->array
.level
= get_imsm_raid_level(map
);
577 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
578 info
->array
.md_minor
= -1;
579 info
->array
.ctime
= 0;
580 info
->array
.utime
= 0;
581 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
583 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
584 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
586 info
->disk
.major
= 0;
587 info
->disk
.minor
= 0;
589 sprintf(info
->text_version
, "/%s/%d",
590 devnum2devname(st
->container_dev
),
591 info
->container_member
);
595 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
597 struct intel_super
*super
= st
->sb
;
598 struct imsm_disk
*disk
;
601 if (super
->current_vol
>= 0) {
602 getinfo_super_imsm_volume(st
, info
);
606 /* Set raid_disks to zero so that Assemble will always pull in valid
609 info
->array
.raid_disks
= 0;
610 info
->array
.level
= LEVEL_CONTAINER
;
611 info
->array
.layout
= 0;
612 info
->array
.md_minor
= -1;
613 info
->array
.ctime
= 0; /* N/A for imsm */
614 info
->array
.utime
= 0;
615 info
->array
.chunk_size
= 0;
617 info
->disk
.major
= 0;
618 info
->disk
.minor
= 0;
619 info
->disk
.raid_disk
= -1;
620 info
->reshape_active
= 0;
621 strcpy(info
->text_version
, "imsm");
622 info
->disk
.number
= -1;
623 info
->disk
.state
= 0;
626 disk
= &super
->disks
->disk
;
627 info
->disk
.number
= super
->disks
->index
;
628 info
->disk
.raid_disk
= super
->disks
->index
;
629 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
630 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
631 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
632 s
= __le32_to_cpu(disk
->status
);
633 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
634 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
635 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
639 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
640 char *update
, char *devname
, int verbose
,
641 int uuid_set
, char *homehost
)
645 /* For 'assemble' and 'force' we need to return non-zero if any
646 * change was made. For others, the return value is ignored.
647 * Update options are:
648 * force-one : This device looks a bit old but needs to be included,
649 * update age info appropriately.
650 * assemble: clear any 'faulty' flag to allow this device to
652 * force-array: Array is degraded but being forced, mark it clean
653 * if that will be needed to assemble it.
655 * newdev: not used ????
656 * grow: Array has gained a new device - this is currently for
658 * resync: mark as dirty so a resync will happen.
659 * name: update the name - preserving the homehost
661 * Following are not relevant for this imsm:
662 * sparc2.2 : update from old dodgey metadata
663 * super-minor: change the preferred_minor number
664 * summaries: update redundant counters.
665 * uuid: Change the uuid of the array to match watch is given
666 * homehost: update the recorded homehost
667 * _reshape_progress: record new reshape_progress position.
670 //struct intel_super *super = st->sb;
671 //struct imsm_super *mpb = super->mpb;
673 if (strcmp(update
, "grow") == 0) {
675 if (strcmp(update
, "resync") == 0) {
676 /* dev->vol.dirty = 1; */
679 /* IMSM has no concept of UUID or homehost */
684 static size_t disks_to_mpb_size(int disks
)
688 size
= sizeof(struct imsm_super
);
689 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
690 size
+= 2 * sizeof(struct imsm_dev
);
691 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
692 size
+= (4 - 2) * sizeof(struct imsm_map
);
693 /* 4 possible disk_ord_tbl's */
694 size
+= 4 * (disks
- 1) * sizeof(__u32
);
699 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
701 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
704 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
707 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
711 * 0 same, or first was empty, and second was copied
712 * 1 second had wrong number
716 struct intel_super
*first
= st
->sb
;
717 struct intel_super
*sec
= tst
->sb
;
725 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
728 /* if an anchor does not have num_raid_devs set then it is a free
731 if (first
->anchor
->num_raid_devs
> 0 &&
732 sec
->anchor
->num_raid_devs
> 0) {
733 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
735 if (first
->anchor
->mpb_size
!= sec
->anchor
->mpb_size
)
737 if (first
->anchor
->check_sum
!= sec
->anchor
->check_sum
)
744 static void fd2devname(int fd
, char *name
)
753 if (fstat(fd
, &st
) != 0)
755 sprintf(path
, "/sys/dev/block/%d:%d",
756 major(st
.st_rdev
), minor(st
.st_rdev
));
758 rv
= readlink(path
, dname
, sizeof(dname
));
763 nm
= strrchr(dname
, '/');
765 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
769 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
771 static int imsm_read_serial(int fd
, char *devname
,
772 __u8 serial
[MAX_RAID_SERIAL_LEN
])
774 unsigned char scsi_serial
[255];
779 memset(scsi_serial
, 0, sizeof(scsi_serial
));
781 if (imsm_env_devname_as_serial()) {
782 char name
[MAX_RAID_SERIAL_LEN
];
784 fd2devname(fd
, name
);
785 strcpy((char *) serial
, name
);
789 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
794 Name
": Failed to retrieve serial for %s\n",
799 rsp_len
= scsi_serial
[3];
800 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
801 if (!isspace(scsi_serial
[4 + i
]))
802 serial
[cnt
++] = scsi_serial
[4 + i
];
803 if (cnt
== MAX_RAID_SERIAL_LEN
)
807 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
813 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
820 __u8 serial
[MAX_RAID_SERIAL_LEN
];
822 rv
= imsm_read_serial(fd
, devname
, serial
);
827 /* check if this is a disk we have seen before. it may be a spare in
828 * super->disks while the current anchor believes it is a raid member,
829 * check if we need to update dl->index
831 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
832 if (memcmp(dl
->serial
, serial
, MAX_RAID_SERIAL_LEN
) == 0)
836 dl
= malloc(sizeof(*dl
));
843 Name
": failed to allocate disk buffer for %s\n",
850 dl
->major
= major(stb
.st_rdev
);
851 dl
->minor
= minor(stb
.st_rdev
);
852 dl
->next
= super
->disks
;
853 dl
->fd
= keep_fd
? fd
: -1;
854 dl
->devname
= devname
? strdup(devname
) : NULL
;
855 strncpy((char *) dl
->serial
, (char *) serial
, MAX_RAID_SERIAL_LEN
);
856 } else if (keep_fd
) {
861 /* look up this disk's index in the current anchor */
862 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
863 struct imsm_disk
*disk_iter
;
865 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
867 if (memcmp(disk_iter
->serial
, dl
->serial
,
868 MAX_RAID_SERIAL_LEN
) == 0) {
871 dl
->disk
= *disk_iter
;
872 status
= __le32_to_cpu(dl
->disk
.status
);
873 /* only set index on disks that are a member of a
874 * populated contianer, i.e. one with raid_devs
876 if (status
& SPARE_DISK
)
884 if (i
== super
->anchor
->num_disks
&& alloc
) {
887 Name
": failed to load disk with serial \'%s\' for %s\n",
888 dl
->serial
, devname
);
892 if (i
== super
->anchor
->num_disks
&& dl
->index
>= 0) {
895 Name
": confused... disk %d with serial \'%s\' "
896 "is not listed in the current anchor\n",
897 dl
->index
, dl
->serial
);
907 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
913 for (i
= 0; i
< src
->vol
.map
[0].num_members
; i
++)
914 dest
->vol
.map
[0].disk_ord_tbl
[i
] = src
->vol
.map
[0].disk_ord_tbl
[i
];
916 if (!src
->vol
.migr_state
)
919 dest
->vol
.map
[1] = src
->vol
.map
[1];
920 for (i
= 0; i
< src
->vol
.map
[1].num_members
; i
++)
921 dest
->vol
.map
[1].disk_ord_tbl
[i
] = src
->vol
.map
[1].disk_ord_tbl
[i
];
924 static int parse_raid_devices(struct intel_super
*super
)
927 struct imsm_dev
*dev_new
;
930 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
931 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
933 len
= sizeof_imsm_dev(dev_iter
);
934 dev_new
= malloc(len
);
937 imsm_copy_dev(dev_new
, dev_iter
);
938 super
->dev_tbl
[i
] = dev_new
;
944 /* retrieve a pointer to the bbm log which starts after all raid devices */
945 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
949 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
951 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
957 static void __free_imsm(struct intel_super
*super
, int free_disks
);
959 /* load_imsm_mpb - read matrix metadata
960 * allocates super->mpb to be freed by free_super
962 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
964 unsigned long long dsize
;
965 unsigned long long sectors
;
967 struct imsm_super
*anchor
;
971 get_dev_size(fd
, NULL
, &dsize
);
973 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
976 Name
": Cannot seek to anchor block on %s: %s\n",
977 devname
, strerror(errno
));
981 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
984 Name
": Failed to allocate imsm anchor buffer"
985 " on %s\n", devname
);
988 if (read(fd
, anchor
, 512) != 512) {
991 Name
": Cannot read anchor block on %s: %s\n",
992 devname
, strerror(errno
));
997 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1000 Name
": no IMSM anchor on %s\n", devname
);
1005 __free_imsm(super
, 0);
1006 super
->len
= __le32_to_cpu(anchor
->mpb_size
);
1007 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1008 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1011 Name
": unable to allocate %zu byte mpb buffer\n",
1016 memcpy(super
->buf
, anchor
, 512);
1018 sectors
= mpb_sectors(anchor
) - 1;
1021 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1023 rc
= parse_raid_devices(super
);
1027 /* read the extended mpb */
1028 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1031 Name
": Cannot seek to extended mpb on %s: %s\n",
1032 devname
, strerror(errno
));
1036 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1039 Name
": Cannot read extended mpb on %s: %s\n",
1040 devname
, strerror(errno
));
1044 check_sum
= __gen_imsm_checksum(super
->anchor
);
1045 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1048 Name
": IMSM checksum %x != %x on %s\n",
1049 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1054 /* FIXME the BBM log is disk specific so we cannot use this global
1055 * buffer for all disks. Ok for now since we only look at the global
1056 * bbm_log_size parameter to gate assembly
1058 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1060 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1062 rc
= parse_raid_devices(super
);
1066 static void free_imsm_disks(struct intel_super
*super
)
1068 while (super
->disks
) {
1069 struct dl
*d
= super
->disks
;
1071 super
->disks
= d
->next
;
1080 /* free all the pieces hanging off of a super pointer */
1081 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1090 free_imsm_disks(super
);
1091 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1092 if (super
->dev_tbl
[i
]) {
1093 free(super
->dev_tbl
[i
]);
1094 super
->dev_tbl
[i
] = NULL
;
1098 static void free_imsm(struct intel_super
*super
)
1100 __free_imsm(super
, 1);
1104 static void free_super_imsm(struct supertype
*st
)
1106 struct intel_super
*super
= st
->sb
;
1115 static struct intel_super
*alloc_super(int creating_imsm
)
1117 struct intel_super
*super
= malloc(sizeof(*super
));
1120 memset(super
, 0, sizeof(*super
));
1121 super
->creating_imsm
= creating_imsm
;
1122 super
->current_vol
= -1;
1129 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1130 char *devname
, int keep_fd
)
1133 struct intel_super
*super
;
1134 struct mdinfo
*sd
, *best
= NULL
;
1141 /* check if this disk is a member of an active array */
1142 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1146 if (sra
->array
.major_version
!= -1 ||
1147 sra
->array
.minor_version
!= -2 ||
1148 strcmp(sra
->text_version
, "imsm") != 0)
1151 super
= alloc_super(0);
1155 /* find the most up to date disk in this array, skipping spares */
1156 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1157 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1158 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1163 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1167 if (super
->anchor
->num_raid_devs
== 0)
1170 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1171 if (!best
|| gen
> bestgen
) {
1186 /* load the most up to date anchor */
1187 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1188 dfd
= dev_open(nm
, O_RDONLY
);
1193 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1200 /* re-parse the disk list with the current anchor */
1201 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1202 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1203 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1208 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1213 if (st
->subarray
[0]) {
1214 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1215 super
->current_vol
= atoi(st
->subarray
);
1221 if (st
->ss
== NULL
) {
1222 st
->ss
= &super_imsm
;
1223 st
->minor_version
= 0;
1224 st
->max_devs
= IMSM_MAX_DEVICES
;
1225 st
->container_dev
= fd2devnum(fd
);
1232 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1234 struct intel_super
*super
;
1238 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1241 if (st
->subarray
[0])
1242 return 1; /* FIXME */
1244 super
= alloc_super(0);
1247 Name
": malloc of %zu failed.\n",
1252 rv
= load_imsm_mpb(fd
, super
, devname
);
1257 Name
": Failed to load all information "
1258 "sections on %s\n", devname
);
1264 if (st
->ss
== NULL
) {
1265 st
->ss
= &super_imsm
;
1266 st
->minor_version
= 0;
1267 st
->max_devs
= IMSM_MAX_DEVICES
;
1273 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1275 if (info
->level
== 1)
1277 return info
->chunk_size
>> 9;
1280 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1284 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1285 if (info
->level
== 1)
1291 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1293 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1296 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1297 unsigned long long size
, char *name
,
1298 char *homehost
, int *uuid
)
1300 /* We are creating a volume inside a pre-existing container.
1301 * so st->sb is already set.
1303 struct intel_super
*super
= st
->sb
;
1304 struct imsm_super
*mpb
= super
->anchor
;
1305 struct imsm_dev
*dev
;
1306 struct imsm_vol
*vol
;
1307 struct imsm_map
*map
;
1308 int idx
= mpb
->num_raid_devs
;
1310 unsigned long long array_blocks
;
1312 size_t size_old
, size_new
;
1314 if (mpb
->num_raid_devs
>= 2) {
1315 fprintf(stderr
, Name
": This imsm-container already has the "
1316 "maximum of 2 volumes\n");
1320 /* ensure the mpb is large enough for the new data */
1321 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1322 size_new
= disks_to_mpb_size(info
->nr_disks
);
1323 if (size_new
> size_old
) {
1325 size_t size_round
= ROUND_UP(size_new
, 512);
1327 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1328 fprintf(stderr
, Name
": could not allocate new mpb\n");
1331 memcpy(mpb_new
, mpb
, size_old
);
1334 super
->anchor
= mpb_new
;
1335 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1336 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1338 super
->current_vol
= idx
;
1339 /* when creating the first raid device in this container set num_disks
1340 * to zero, i.e. delete this spare and add raid member devices in
1341 * add_to_super_imsm_volume()
1343 if (super
->current_vol
== 0)
1345 sprintf(st
->subarray
, "%d", idx
);
1346 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1348 fprintf(stderr
, Name
": could not allocate raid device\n");
1351 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1352 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1353 info
->layout
, info
->chunk_size
,
1355 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1356 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1357 dev
->status
= __cpu_to_le32(0);
1358 dev
->reserved_blocks
= __cpu_to_le32(0);
1360 vol
->migr_state
= 0;
1363 for (i
= 0; i
< idx
; i
++) {
1364 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1365 struct imsm_map
*pmap
= &prev
->vol
.map
[0];
1367 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1368 offset
+= IMSM_RESERVED_SECTORS
;
1371 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1372 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1373 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1374 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1375 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1376 IMSM_T_STATE_NORMAL
;
1378 if (info
->level
== 1 && info
->raid_disks
> 2) {
1379 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1380 "in a raid1 volume\n");
1383 if (info
->level
== 10)
1384 map
->raid_level
= 1;
1386 map
->raid_level
= info
->level
;
1388 map
->num_members
= info
->raid_disks
;
1389 for (i
= 0; i
< map
->num_members
; i
++) {
1390 /* initialized in add_to_super */
1391 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1393 mpb
->num_raid_devs
++;
1394 super
->dev_tbl
[super
->current_vol
] = dev
;
1399 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1400 unsigned long long size
, char *name
,
1401 char *homehost
, int *uuid
)
1403 /* This is primarily called by Create when creating a new array.
1404 * We will then get add_to_super called for each component, and then
1405 * write_init_super called to write it out to each device.
1406 * For IMSM, Create can create on fresh devices or on a pre-existing
1408 * To create on a pre-existing array a different method will be called.
1409 * This one is just for fresh drives.
1411 struct intel_super
*super
;
1412 struct imsm_super
*mpb
;
1420 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1423 super
= alloc_super(1);
1426 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1427 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1432 memset(mpb
, 0, mpb_size
);
1434 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1435 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1436 strlen(MPB_VERSION_RAID5
));
1437 mpb
->mpb_size
= mpb_size
;
1443 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1444 int fd
, char *devname
)
1446 struct intel_super
*super
= st
->sb
;
1447 struct imsm_super
*mpb
= super
->anchor
;
1449 struct imsm_dev
*dev
;
1450 struct imsm_map
*map
;
1453 dev
= get_imsm_dev(super
, super
->current_vol
);
1454 map
= &dev
->vol
.map
[0];
1456 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1457 if (dl
->major
== dk
->major
&&
1458 dl
->minor
== dk
->minor
)
1461 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1464 /* add a pristine spare to the metadata */
1465 if (dl
->index
< 0) {
1466 dl
->index
= super
->anchor
->num_disks
;
1467 super
->anchor
->num_disks
++;
1469 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1470 status
= CONFIGURED_DISK
| USABLE_DISK
;
1471 dl
->disk
.status
= __cpu_to_le32(status
);
1473 /* if we are creating the first raid device update the family number */
1474 if (super
->current_vol
== 0) {
1476 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
1477 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
1481 sum
= __gen_imsm_checksum(mpb
);
1482 mpb
->family_num
= __cpu_to_le32(sum
);
1486 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1487 int fd
, char *devname
)
1489 struct intel_super
*super
= st
->sb
;
1491 unsigned long long size
;
1496 if (super
->current_vol
>= 0) {
1497 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1502 dd
= malloc(sizeof(*dd
));
1505 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1508 memset(dd
, 0, sizeof(*dd
));
1509 dd
->major
= major(stb
.st_rdev
);
1510 dd
->minor
= minor(stb
.st_rdev
);
1512 dd
->devname
= devname
? strdup(devname
) : NULL
;
1513 dd
->next
= super
->disks
;
1515 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1518 Name
": failed to retrieve scsi serial, aborting\n");
1523 get_dev_size(fd
, NULL
, &size
);
1525 status
= USABLE_DISK
| SPARE_DISK
;
1526 strcpy((char *) dd
->disk
.serial
, (char *) dd
->serial
);
1527 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
1528 dd
->disk
.status
= __cpu_to_le32(status
);
1529 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1530 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
1532 dd
->disk
.scsi_id
= __cpu_to_le32(0);
1536 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1538 /* spare records have their own family number and do not have any defined raid
1541 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
1543 struct imsm_super mpb_save
;
1544 struct imsm_super
*mpb
= super
->anchor
;
1549 mpb
->num_raid_devs
= 0;
1551 mpb
->mpb_size
= sizeof(struct imsm_super
);
1552 mpb
->generation_num
= __cpu_to_le32(1UL);
1554 for (d
= super
->disks
; d
; d
= d
->next
) {
1558 mpb
->disk
[0] = d
->disk
;
1559 sum
= __gen_imsm_checksum(mpb
);
1560 mpb
->family_num
= __cpu_to_le32(sum
);
1561 sum
= __gen_imsm_checksum(mpb
);
1562 mpb
->check_sum
= __cpu_to_le32(sum
);
1564 if (store_imsm_mpb(d
->fd
, super
)) {
1565 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1566 __func__
, d
->major
, d
->minor
, strerror(errno
));
1580 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1582 struct imsm_super
*mpb
= super
->anchor
;
1590 /* 'generation' is incremented everytime the metadata is written */
1591 generation
= __le32_to_cpu(mpb
->generation_num
);
1593 mpb
->generation_num
= __cpu_to_le32(generation
);
1595 for (d
= super
->disks
; d
; d
= d
->next
) {
1600 mpb
->disk
[d
->index
] = d
->disk
;
1603 if (raid_disks
!= mpb
->num_disks
) {
1604 fprintf(stderr
, "%s: expected %d disks only found %d\n",
1605 __func__
, mpb
->num_disks
, raid_disks
);
1609 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1610 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1612 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1615 /* recalculate checksum */
1616 sum
= __gen_imsm_checksum(mpb
);
1617 mpb
->check_sum
= __cpu_to_le32(sum
);
1619 /* write the mpb for disks that compose raid devices */
1620 for (d
= super
->disks
; d
; d
= d
->next
) {
1623 if (store_imsm_mpb(d
->fd
, super
)) {
1624 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1625 __func__
, d
->major
, d
->minor
, strerror(errno
));
1635 return write_super_imsm_spares(super
, doclose
);
1640 static int write_init_super_imsm(struct supertype
*st
)
1642 if (st
->update_tail
) {
1643 /* queue the recently created array as a metadata update */
1645 struct imsm_update_create_array
*u
;
1646 struct intel_super
*super
= st
->sb
;
1647 struct imsm_dev
*dev
;
1650 if (super
->current_vol
< 0 ||
1651 !(dev
= get_imsm_dev(super
, super
->current_vol
))) {
1652 fprintf(stderr
, "%s: could not determine sub-array\n",
1658 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
);
1661 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1666 u
->type
= update_create_array
;
1667 u
->dev_idx
= super
->current_vol
;
1668 imsm_copy_dev(&u
->dev
, dev
);
1669 append_metadata_update(st
, u
, len
);
1671 for (d
= super
->disks
; d
; d
= d
->next
) {
1678 return write_super_imsm(st
->sb
, 1);
1681 static int store_zero_imsm(struct supertype
*st
, int fd
)
1683 unsigned long long dsize
;
1686 get_dev_size(fd
, NULL
, &dsize
);
1688 /* first block is stored on second to last sector of the disk */
1689 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1692 if (posix_memalign(&buf
, 512, 512) != 0)
1695 memset(buf
, 0, 512);
1696 if (write(fd
, buf
, 512) != 512)
1701 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1702 int layout
, int raiddisks
, int chunk
,
1703 unsigned long long size
, char *dev
,
1704 unsigned long long *freesize
,
1708 unsigned long long ldsize
;
1710 if (level
!= LEVEL_CONTAINER
)
1715 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1718 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1719 dev
, strerror(errno
));
1722 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1728 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1733 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1734 * FIX ME add ahci details
1736 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1737 int layout
, int raiddisks
, int chunk
,
1738 unsigned long long size
, char *dev
,
1739 unsigned long long *freesize
,
1743 struct intel_super
*super
= st
->sb
;
1745 unsigned long long pos
= 0;
1746 unsigned long long maxsize
;
1750 if (level
== LEVEL_CONTAINER
)
1753 if (level
== 1 && raiddisks
> 2) {
1755 fprintf(stderr
, Name
": imsm does not support more "
1756 "than 2 in a raid1 configuration\n");
1760 /* We must have the container info already read in. */
1765 /* General test: make sure there is space for
1766 * 'raiddisks' device extents of size 'size' at a given
1769 unsigned long long minsize
= size
*2 /* convert to blocks */;
1770 unsigned long long start_offset
= ~0ULL;
1773 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1774 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1779 e
= get_extents(super
, dl
);
1782 unsigned long long esize
;
1783 esize
= e
[i
].start
- pos
;
1784 if (esize
>= minsize
)
1786 if (found
&& start_offset
== ~0ULL) {
1789 } else if (found
&& pos
!= start_offset
) {
1793 pos
= e
[i
].start
+ e
[i
].size
;
1795 } while (e
[i
-1].size
);
1800 if (dcnt
< raiddisks
) {
1802 fprintf(stderr
, Name
": imsm: Not enough "
1803 "devices with space for this array "
1810 /* This device must be a member of the set */
1811 if (stat(dev
, &stb
) < 0)
1813 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1815 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1816 if (dl
->major
== major(stb
.st_rdev
) &&
1817 dl
->minor
== minor(stb
.st_rdev
))
1822 fprintf(stderr
, Name
": %s is not in the "
1823 "same imsm set\n", dev
);
1826 e
= get_extents(super
, dl
);
1830 unsigned long long esize
;
1831 esize
= e
[i
].start
- pos
;
1832 if (esize
>= maxsize
)
1834 pos
= e
[i
].start
+ e
[i
].size
;
1836 } while (e
[i
-1].size
);
1837 *freesize
= maxsize
;
1842 int imsm_bbm_log_size(struct imsm_super
*mpb
)
1844 return __le32_to_cpu(mpb
->bbm_log_size
);
1847 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1848 int raiddisks
, int chunk
, unsigned long long size
,
1849 char *dev
, unsigned long long *freesize
,
1855 /* if given unused devices create a container
1856 * if given given devices in a container create a member volume
1858 if (level
== LEVEL_CONTAINER
) {
1859 /* Must be a fresh device to add to a container */
1860 return validate_geometry_imsm_container(st
, level
, layout
,
1861 raiddisks
, chunk
, size
,
1867 /* creating in a given container */
1868 return validate_geometry_imsm_volume(st
, level
, layout
,
1869 raiddisks
, chunk
, size
,
1870 dev
, freesize
, verbose
);
1873 /* limit creation to the following levels */
1885 /* This device needs to be a device in an 'imsm' container */
1886 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1890 Name
": Cannot create this array on device %s\n",
1895 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
1897 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1898 dev
, strerror(errno
));
1901 /* Well, it is in use by someone, maybe an 'imsm' container. */
1902 cfd
= open_container(fd
);
1906 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
1910 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
1912 if (sra
&& sra
->array
.major_version
== -1 &&
1913 strcmp(sra
->text_version
, "imsm") == 0) {
1914 /* This is a member of a imsm container. Load the container
1915 * and try to create a volume
1917 struct intel_super
*super
;
1919 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
1921 st
->container_dev
= fd2devnum(cfd
);
1923 return validate_geometry_imsm_volume(st
, level
, layout
,
1929 } else /* may belong to another container */
1935 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
1937 /* Given a container loaded by load_super_imsm_all,
1938 * extract information about all the arrays into
1941 * For each imsm_dev create an mdinfo, fill it in,
1942 * then look for matching devices in super->disks
1943 * and create appropriate device mdinfo.
1945 struct intel_super
*super
= st
->sb
;
1946 struct imsm_super
*mpb
= super
->anchor
;
1947 struct mdinfo
*rest
= NULL
;
1950 /* do not assemble arrays that might have bad blocks */
1951 if (imsm_bbm_log_size(super
->anchor
)) {
1952 fprintf(stderr
, Name
": BBM log found in metadata. "
1953 "Cannot activate array(s).\n");
1957 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1958 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
1959 struct imsm_vol
*vol
= &dev
->vol
;
1960 struct imsm_map
*map
= vol
->map
;
1961 struct mdinfo
*this;
1964 this = malloc(sizeof(*this));
1965 memset(this, 0, sizeof(*this));
1969 this->array
.level
= get_imsm_raid_level(map
);
1970 this->array
.raid_disks
= map
->num_members
;
1971 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
1972 this->array
.md_minor
= -1;
1973 this->array
.ctime
= 0;
1974 this->array
.utime
= 0;
1975 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1976 this->array
.state
= !vol
->dirty
;
1977 this->container_member
= i
;
1978 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1979 this->resync_start
= 0;
1981 this->resync_start
= ~0ULL;
1983 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1984 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
1986 sprintf(this->text_version
, "/%s/%d",
1987 devnum2devname(st
->container_dev
),
1988 this->container_member
);
1990 memset(this->uuid
, 0, sizeof(this->uuid
));
1992 this->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1994 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
1995 struct mdinfo
*info_d
;
2000 idx
= get_imsm_disk_idx(map
, slot
);
2001 for (d
= super
->disks
; d
; d
= d
->next
)
2002 if (d
->index
== idx
)
2006 break; /* shouldn't this be continue ?? */
2008 info_d
= malloc(sizeof(*info_d
));
2010 break; /* ditto ?? */
2011 memset(info_d
, 0, sizeof(*info_d
));
2012 info_d
->next
= this->devs
;
2013 this->devs
= info_d
;
2015 s
= __le32_to_cpu(d
->disk
.status
);
2017 info_d
->disk
.number
= d
->index
;
2018 info_d
->disk
.major
= d
->major
;
2019 info_d
->disk
.minor
= d
->minor
;
2020 info_d
->disk
.raid_disk
= slot
;
2021 info_d
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
2022 info_d
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
2023 info_d
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
2025 this->array
.working_disks
++;
2027 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
2028 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2029 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2031 strcpy(info_d
->name
, d
->devname
);
2039 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
2042 struct intel_super
*super
= c
->sb
;
2043 struct imsm_super
*mpb
= super
->anchor
;
2045 if (atoi(inst
) >= mpb
->num_raid_devs
) {
2046 fprintf(stderr
, "%s: subarry index %d, out of range\n",
2047 __func__
, atoi(inst
));
2051 dprintf("imsm: open_new %s\n", inst
);
2052 a
->info
.container_member
= atoi(inst
);
2056 static __u8
imsm_check_degraded(struct intel_super
*super
, int n
, int failed
)
2058 struct imsm_dev
*dev
= get_imsm_dev(super
, n
);
2059 struct imsm_map
*map
= dev
->vol
.map
;
2062 return map
->map_state
;
2064 switch (get_imsm_raid_level(map
)) {
2066 return IMSM_T_STATE_FAILED
;
2069 if (failed
< map
->num_members
)
2070 return IMSM_T_STATE_DEGRADED
;
2072 return IMSM_T_STATE_FAILED
;
2077 * check to see if any mirrors have failed,
2078 * otherwise we are degraded
2080 int device_per_mirror
= 2; /* FIXME is this always the case?
2081 * and are they always adjacent?
2086 for (i
= 0; i
< map
->num_members
; i
++) {
2087 int idx
= get_imsm_disk_idx(map
, i
);
2088 struct imsm_disk
*disk
= get_imsm_disk(super
, idx
);
2090 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2093 if (failed
>= device_per_mirror
)
2094 return IMSM_T_STATE_FAILED
;
2096 /* reset 'failed' for next mirror set */
2097 if (!((i
+ 1) % device_per_mirror
))
2101 return IMSM_T_STATE_DEGRADED
;
2105 return IMSM_T_STATE_DEGRADED
;
2107 return IMSM_T_STATE_FAILED
;
2113 return map
->map_state
;
2116 static int imsm_count_failed(struct intel_super
*super
, struct imsm_map
*map
)
2120 struct imsm_disk
*disk
;
2122 for (i
= 0; i
< map
->num_members
; i
++) {
2123 int idx
= get_imsm_disk_idx(map
, i
);
2125 disk
= get_imsm_disk(super
, idx
);
2126 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2133 static void imsm_set_array_state(struct active_array
*a
, int consistent
)
2135 int inst
= a
->info
.container_member
;
2136 struct intel_super
*super
= a
->container
->sb
;
2137 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2138 struct imsm_map
*map
= &dev
->vol
.map
[0];
2139 int dirty
= !consistent
;
2143 if (a
->resync_start
== ~0ULL) {
2144 failed
= imsm_count_failed(super
, map
);
2145 map_state
= imsm_check_degraded(super
, inst
, failed
);
2146 /* complete recovery or initial resync */
2148 map_state
= IMSM_T_STATE_NORMAL
;
2149 if (map
->map_state
!= map_state
) {
2150 dprintf("imsm: map_state %d: %d\n",
2152 map
->map_state
= map_state
;
2153 super
->updates_pending
++;
2156 /* complete resync */
2157 if (!dirty
&& dev
->vol
.dirty
) {
2158 dprintf("imsm: mark 'clean'\n");
2160 super
->updates_pending
++;
2166 if (dirty
&& !dev
->vol
.dirty
) {
2167 dprintf("imsm: mark 'dirty' (%llu)\n", a
->resync_start
);
2169 super
->updates_pending
++;
2173 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2175 int inst
= a
->info
.container_member
;
2176 struct intel_super
*super
= a
->container
->sb
;
2177 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2178 struct imsm_map
*map
= dev
->vol
.map
;
2179 struct imsm_disk
*disk
;
2182 int new_failure
= 0;
2184 if (n
> map
->num_members
)
2185 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2186 n
, map
->num_members
- 1);
2191 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2193 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, n
));
2195 /* check for new failures */
2196 status
= __le32_to_cpu(disk
->status
);
2197 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2198 status
|= FAILED_DISK
;
2199 disk
->status
= __cpu_to_le32(status
);
2201 super
->updates_pending
++;
2203 /* check if in_sync */
2204 if ((state
& DS_INSYNC
) && !(status
& USABLE_DISK
)) {
2205 status
|= USABLE_DISK
;
2206 disk
->status
= __cpu_to_le32(status
);
2207 super
->updates_pending
++;
2210 /* the number of failures have changed, count up 'failed' to determine
2211 * degraded / failed status
2213 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
2214 failed
= imsm_count_failed(super
, map
);
2216 /* determine map_state based on failed or in_sync count */
2218 map
->map_state
= imsm_check_degraded(super
, inst
, failed
);
2219 else if (map
->map_state
== IMSM_T_STATE_DEGRADED
) {
2223 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2224 if (d
->curr_state
& DS_INSYNC
)
2227 if (working
== a
->info
.array
.raid_disks
) {
2228 map
->map_state
= IMSM_T_STATE_NORMAL
;
2229 super
->updates_pending
++;
2234 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2236 struct imsm_super
*mpb
= super
->anchor
;
2237 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2238 unsigned long long dsize
;
2239 unsigned long long sectors
;
2241 get_dev_size(fd
, NULL
, &dsize
);
2243 if (mpb_size
> 512) {
2244 /* -1 to account for anchor */
2245 sectors
= mpb_sectors(mpb
) - 1;
2247 /* write the extended mpb to the sectors preceeding the anchor */
2248 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2251 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2255 /* first block is stored on second to last sector of the disk */
2256 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2259 if (write(fd
, super
->buf
, 512) != 512)
2265 static void imsm_sync_metadata(struct supertype
*container
)
2267 struct intel_super
*super
= container
->sb
;
2269 if (!super
->updates_pending
)
2272 write_super_imsm(super
, 0);
2274 super
->updates_pending
= 0;
2277 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2278 struct metadata_update
**updates
)
2281 * Find a device with unused free space and use it to replace a
2282 * failed/vacant region in an array. We replace failed regions one a
2283 * array at a time. The result is that a new spare disk will be added
2284 * to the first failed array and after the monitor has finished
2285 * propagating failures the remainder will be consumed.
2287 * FIXME add a capability for mdmon to request spares from another
2291 struct intel_super
*super
= a
->container
->sb
;
2292 int inst
= a
->info
.container_member
;
2293 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2294 struct imsm_map
*map
= dev
->vol
.map
;
2295 int failed
= a
->info
.array
.raid_disks
;
2296 struct mdinfo
*rv
= NULL
;
2299 struct metadata_update
*mu
;
2301 struct imsm_update_activate_spare
*u
;
2305 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2306 if ((d
->curr_state
& DS_FAULTY
) &&
2308 /* wait for Removal to happen */
2310 if (d
->state_fd
>= 0)
2314 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2315 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2316 if (imsm_check_degraded(super
, inst
, failed
) != IMSM_T_STATE_DEGRADED
)
2319 /* For each slot, if it is not working, find a spare */
2321 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2322 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2323 if (d
->disk
.raid_disk
== i
)
2325 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2326 if (d
&& (d
->state_fd
>= 0))
2329 /* OK, this device needs recovery. Find a spare */
2330 for ( ; dl
; dl
= dl
->next
) {
2331 unsigned long long esize
;
2332 unsigned long long pos
;
2339 /* If in this array, skip */
2340 for (d2
= a
->info
.devs
; d2
; d2
= d2
->next
)
2341 if (d2
->disk
.major
== dl
->major
&&
2342 d2
->disk
.minor
== dl
->minor
) {
2343 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2349 /* Does this unused device have the requisite free space?
2350 * We need a->info.component_size sectors
2352 ex
= get_extents(super
, dl
);
2354 dprintf("cannot get extents\n");
2360 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2363 /* check that we can start at pba_of_lba0 with
2364 * a->info.component_size of space
2366 esize
= ex
[j
].start
- pos
;
2367 if (array_start
>= pos
&&
2368 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2372 pos
= ex
[j
].start
+ ex
[j
].size
;
2375 } while (ex
[j
-1].size
);
2379 dprintf("%x:%x does not have %llu at %d\n",
2380 dl
->major
, dl
->minor
,
2381 a
->info
.component_size
,
2382 __le32_to_cpu(map
->pba_of_lba0
));
2387 /* found a usable disk with enough space */
2388 di
= malloc(sizeof(*di
));
2389 memset(di
, 0, sizeof(*di
));
2391 /* dl->index will be -1 in the case we are activating a
2392 * pristine spare. imsm_process_update() will create a
2393 * new index in this case. Once a disk is found to be
2394 * failed in all member arrays it is kicked from the
2397 di
->disk
.number
= dl
->index
;
2399 /* (ab)use di->devs to store a pointer to the device
2402 di
->devs
= (struct mdinfo
*) dl
;
2404 di
->disk
.raid_disk
= i
;
2405 di
->disk
.major
= dl
->major
;
2406 di
->disk
.minor
= dl
->minor
;
2408 di
->data_offset
= array_start
;
2409 di
->component_size
= a
->info
.component_size
;
2410 di
->container_member
= inst
;
2414 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2422 /* No spares found */
2424 /* Now 'rv' has a list of devices to return.
2425 * Create a metadata_update record to update the
2426 * disk_ord_tbl for the array
2428 mu
= malloc(sizeof(*mu
));
2429 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2431 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2432 mu
->next
= *updates
;
2433 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2435 for (di
= rv
; di
; di
= di
->next
) {
2436 u
->type
= update_activate_spare
;
2437 u
->dl
= (struct dl
*) di
->devs
;
2439 u
->slot
= di
->disk
.raid_disk
;
2450 static int disks_overlap(struct imsm_map
*m1
, struct imsm_map
*m2
)
2456 for (i
= 0; i
< m1
->num_members
; i
++) {
2457 idx
= get_imsm_disk_idx(m1
, i
);
2458 for (j
= 0; j
< m2
->num_members
; j
++)
2459 if (idx
== get_imsm_disk_idx(m2
, j
))
2466 static void imsm_process_update(struct supertype
*st
,
2467 struct metadata_update
*update
)
2470 * crack open the metadata_update envelope to find the update record
2471 * update can be one of:
2472 * update_activate_spare - a spare device has replaced a failed
2473 * device in an array, update the disk_ord_tbl. If this disk is
2474 * present in all member arrays then also clear the SPARE_DISK
2477 struct intel_super
*super
= st
->sb
;
2478 struct imsm_super
*mpb
= super
->anchor
;
2479 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2482 case update_activate_spare
: {
2483 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
2484 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
2485 struct imsm_map
*map
= &dev
->vol
.map
[0];
2486 struct active_array
*a
;
2487 struct imsm_disk
*disk
;
2494 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2499 fprintf(stderr
, "error: imsm_activate_spare passed "
2500 "an unknown disk (index: %d serial: %s)\n",
2501 u
->dl
->index
, u
->dl
->serial
);
2505 super
->updates_pending
++;
2507 /* adding a pristine spare, assign a new index */
2508 if (dl
->index
< 0) {
2509 dl
->index
= super
->anchor
->num_disks
;
2510 super
->anchor
->num_disks
++;
2512 victim
= get_imsm_disk_idx(map
, u
->slot
);
2513 map
->disk_ord_tbl
[u
->slot
] = __cpu_to_le32(dl
->index
);
2515 status
= __le32_to_cpu(disk
->status
);
2516 status
|= CONFIGURED_DISK
;
2517 status
&= ~(SPARE_DISK
| USABLE_DISK
);
2518 disk
->status
= __cpu_to_le32(status
);
2520 /* count arrays using the victim in the metadata */
2522 for (a
= st
->arrays
; a
; a
= a
->next
) {
2523 dev
= get_imsm_dev(super
, a
->info
.container_member
);
2524 map
= &dev
->vol
.map
[0];
2525 for (i
= 0; i
< map
->num_members
; i
++)
2526 if (victim
== get_imsm_disk_idx(map
, i
))
2530 /* clear some flags if the victim is no longer being
2534 disk
= get_imsm_disk(super
, victim
);
2535 status
= __le32_to_cpu(disk
->status
);
2536 status
&= ~(CONFIGURED_DISK
| USABLE_DISK
);
2537 disk
->status
= __cpu_to_le32(status
);
2538 /* at this point the disk can be removed from the
2539 * metadata, however we need to guarantee that we do
2540 * not race with any manager thread routine that relies
2541 * on dl->index or map->disk_ord_tbl
2546 case update_create_array
: {
2547 /* someone wants to create a new array, we need to be aware of
2548 * a few races/collisions:
2549 * 1/ 'Create' called by two separate instances of mdadm
2550 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
2551 * devices that have since been assimilated via
2553 * In the event this update can not be carried out mdadm will
2554 * (FIX ME) notice that its update did not take hold.
2556 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2557 struct imsm_dev
*dev
;
2558 struct imsm_map
*map
, *new_map
;
2559 unsigned long long start
, end
;
2560 unsigned long long new_start
, new_end
;
2564 /* handle racing creates: first come first serve */
2565 if (u
->dev_idx
< mpb
->num_raid_devs
) {
2566 dprintf("%s: subarray %d already defined\n",
2567 __func__
, u
->dev_idx
);
2571 /* check update is next in sequence */
2572 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
2573 dprintf("%s: can not create arrays out of sequence\n",
2578 new_map
= &u
->dev
.vol
.map
[0];
2579 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
2580 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
2582 /* handle activate_spare versus create race:
2583 * check to make sure that overlapping arrays do not include
2586 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2587 dev
= get_imsm_dev(super
, i
);
2588 map
= &dev
->vol
.map
[0];
2589 start
= __le32_to_cpu(map
->pba_of_lba0
);
2590 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
2591 if ((new_start
>= start
&& new_start
<= end
) ||
2592 (start
>= new_start
&& start
<= new_end
))
2594 if (overlap
&& disks_overlap(map
, new_map
)) {
2595 dprintf("%s: arrays overlap\n", __func__
);
2599 /* check num_members sanity */
2600 if (new_map
->num_members
> mpb
->num_disks
) {
2601 dprintf("%s: num_disks out of range\n", __func__
);
2605 /* check that prepare update was successful */
2606 if (!update
->space
) {
2607 dprintf("%s: prepare update failed\n", __func__
);
2611 super
->updates_pending
++;
2612 dev
= update
->space
;
2613 update
->space
= NULL
;
2614 imsm_copy_dev(dev
, &u
->dev
);
2615 super
->dev_tbl
[u
->dev_idx
] = dev
;
2616 mpb
->num_raid_devs
++;
2618 /* fix up flags, if arrays overlap then the drives can not be
2621 for (i
= 0; i
< map
->num_members
; i
++) {
2622 struct imsm_disk
*disk
;
2625 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, i
));
2626 status
= __le32_to_cpu(disk
->status
);
2627 status
|= CONFIGURED_DISK
;
2629 status
&= ~SPARE_DISK
;
2630 disk
->status
= __cpu_to_le32(status
);
2637 static void imsm_prepare_update(struct supertype
*st
,
2638 struct metadata_update
*update
)
2641 * Allocate space to hold new disk entries, raid-device entries or a
2642 * new mpb if necessary. We currently maintain an mpb large enough to
2643 * hold 2 subarrays for the given number of disks. This may not be
2644 * sufficient when reshaping.
2646 * FIX ME handle the reshape case.
2648 * The monitor will be able to safely change super->mpb by arranging
2649 * for it to be freed in check_update_queue(). I.e. the monitor thread
2650 * will start using the new pointer and the manager can continue to use
2651 * the old value until check_update_queue() runs.
2653 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2656 case update_create_array
: {
2657 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2658 size_t len
= sizeof_imsm_dev(&u
->dev
);
2660 update
->space
= malloc(len
);
2670 struct superswitch super_imsm
= {
2672 .examine_super
= examine_super_imsm
,
2673 .brief_examine_super
= brief_examine_super_imsm
,
2674 .detail_super
= detail_super_imsm
,
2675 .brief_detail_super
= brief_detail_super_imsm
,
2676 .write_init_super
= write_init_super_imsm
,
2678 .match_home
= match_home_imsm
,
2679 .uuid_from_super
= uuid_from_super_imsm
,
2680 .getinfo_super
= getinfo_super_imsm
,
2681 .update_super
= update_super_imsm
,
2683 .avail_size
= avail_size_imsm
,
2685 .compare_super
= compare_super_imsm
,
2687 .load_super
= load_super_imsm
,
2688 .init_super
= init_super_imsm
,
2689 .add_to_super
= add_to_super_imsm
,
2690 .store_super
= store_zero_imsm
,
2691 .free_super
= free_super_imsm
,
2692 .match_metadata_desc
= match_metadata_desc_imsm
,
2693 .container_content
= container_content_imsm
,
2695 .validate_geometry
= validate_geometry_imsm
,
2699 .open_new
= imsm_open_new
,
2700 .load_super
= load_super_imsm
,
2701 .set_array_state
= imsm_set_array_state
,
2702 .set_disk
= imsm_set_disk
,
2703 .sync_metadata
= imsm_sync_metadata
,
2704 .activate_spare
= imsm_activate_spare
,
2705 .process_update
= imsm_process_update
,
2706 .prepare_update
= imsm_prepare_update
,