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 struct intel_super
*super
= st
->sb
;
501 printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
502 __le32_to_cpu(super
->anchor
->family_num
));
505 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
507 printf("%s\n", __FUNCTION__
);
510 static void brief_detail_super_imsm(struct supertype
*st
)
512 printf("%s\n", __FUNCTION__
);
516 static int match_home_imsm(struct supertype
*st
, char *homehost
)
518 printf("%s\n", __FUNCTION__
);
523 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
525 printf("%s\n", __FUNCTION__
);
530 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
532 __u8
*v
= get_imsm_version(mpb
);
533 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
534 char major
[] = { 0, 0, 0 };
535 char minor
[] = { 0 ,0, 0 };
536 char patch
[] = { 0, 0, 0 };
537 char *ver_parse
[] = { major
, minor
, patch
};
541 while (*v
!= '\0' && v
< end
) {
542 if (*v
!= '.' && j
< 2)
543 ver_parse
[i
][j
++] = *v
;
551 *m
= strtol(minor
, NULL
, 0);
552 *p
= strtol(patch
, NULL
, 0);
556 static int imsm_level_to_layout(int level
)
564 return ALGORITHM_LEFT_ASYMMETRIC
;
566 return 0x102; //FIXME is this correct?
571 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
573 struct intel_super
*super
= st
->sb
;
574 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
575 struct imsm_map
*map
= &dev
->vol
.map
[0];
577 info
->container_member
= super
->current_vol
;
578 info
->array
.raid_disks
= map
->num_members
;
579 info
->array
.level
= get_imsm_raid_level(map
);
580 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
581 info
->array
.md_minor
= -1;
582 info
->array
.ctime
= 0;
583 info
->array
.utime
= 0;
584 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
586 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
587 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
589 info
->disk
.major
= 0;
590 info
->disk
.minor
= 0;
592 sprintf(info
->text_version
, "/%s/%d",
593 devnum2devname(st
->container_dev
),
594 info
->container_member
);
598 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
600 struct intel_super
*super
= st
->sb
;
601 struct imsm_disk
*disk
;
604 if (super
->current_vol
>= 0) {
605 getinfo_super_imsm_volume(st
, info
);
609 /* Set raid_disks to zero so that Assemble will always pull in valid
612 info
->array
.raid_disks
= 0;
613 info
->array
.level
= LEVEL_CONTAINER
;
614 info
->array
.layout
= 0;
615 info
->array
.md_minor
= -1;
616 info
->array
.ctime
= 0; /* N/A for imsm */
617 info
->array
.utime
= 0;
618 info
->array
.chunk_size
= 0;
620 info
->disk
.major
= 0;
621 info
->disk
.minor
= 0;
622 info
->disk
.raid_disk
= -1;
623 info
->reshape_active
= 0;
624 strcpy(info
->text_version
, "imsm");
625 info
->disk
.number
= -1;
626 info
->disk
.state
= 0;
629 disk
= &super
->disks
->disk
;
630 info
->disk
.number
= super
->disks
->index
;
631 info
->disk
.raid_disk
= super
->disks
->index
;
632 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
633 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
634 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
635 s
= __le32_to_cpu(disk
->status
);
636 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
637 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
638 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
642 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
643 char *update
, char *devname
, int verbose
,
644 int uuid_set
, char *homehost
)
648 /* For 'assemble' and 'force' we need to return non-zero if any
649 * change was made. For others, the return value is ignored.
650 * Update options are:
651 * force-one : This device looks a bit old but needs to be included,
652 * update age info appropriately.
653 * assemble: clear any 'faulty' flag to allow this device to
655 * force-array: Array is degraded but being forced, mark it clean
656 * if that will be needed to assemble it.
658 * newdev: not used ????
659 * grow: Array has gained a new device - this is currently for
661 * resync: mark as dirty so a resync will happen.
662 * name: update the name - preserving the homehost
664 * Following are not relevant for this imsm:
665 * sparc2.2 : update from old dodgey metadata
666 * super-minor: change the preferred_minor number
667 * summaries: update redundant counters.
668 * uuid: Change the uuid of the array to match watch is given
669 * homehost: update the recorded homehost
670 * _reshape_progress: record new reshape_progress position.
673 //struct intel_super *super = st->sb;
674 //struct imsm_super *mpb = super->mpb;
676 if (strcmp(update
, "grow") == 0) {
678 if (strcmp(update
, "resync") == 0) {
679 /* dev->vol.dirty = 1; */
682 /* IMSM has no concept of UUID or homehost */
687 static size_t disks_to_mpb_size(int disks
)
691 size
= sizeof(struct imsm_super
);
692 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
693 size
+= 2 * sizeof(struct imsm_dev
);
694 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
695 size
+= (4 - 2) * sizeof(struct imsm_map
);
696 /* 4 possible disk_ord_tbl's */
697 size
+= 4 * (disks
- 1) * sizeof(__u32
);
702 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
704 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
707 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
710 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
714 * 0 same, or first was empty, and second was copied
715 * 1 second had wrong number
719 struct intel_super
*first
= st
->sb
;
720 struct intel_super
*sec
= tst
->sb
;
728 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
731 /* if an anchor does not have num_raid_devs set then it is a free
734 if (first
->anchor
->num_raid_devs
> 0 &&
735 sec
->anchor
->num_raid_devs
> 0) {
736 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
738 if (first
->anchor
->mpb_size
!= sec
->anchor
->mpb_size
)
740 if (first
->anchor
->check_sum
!= sec
->anchor
->check_sum
)
747 static void fd2devname(int fd
, char *name
)
756 if (fstat(fd
, &st
) != 0)
758 sprintf(path
, "/sys/dev/block/%d:%d",
759 major(st
.st_rdev
), minor(st
.st_rdev
));
761 rv
= readlink(path
, dname
, sizeof(dname
));
766 nm
= strrchr(dname
, '/');
768 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
772 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
774 static int imsm_read_serial(int fd
, char *devname
,
775 __u8 serial
[MAX_RAID_SERIAL_LEN
])
777 unsigned char scsi_serial
[255];
782 memset(scsi_serial
, 0, sizeof(scsi_serial
));
784 if (imsm_env_devname_as_serial()) {
785 char name
[MAX_RAID_SERIAL_LEN
];
787 fd2devname(fd
, name
);
788 strcpy((char *) serial
, name
);
792 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
797 Name
": Failed to retrieve serial for %s\n",
802 rsp_len
= scsi_serial
[3];
803 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
804 if (!isspace(scsi_serial
[4 + i
]))
805 serial
[cnt
++] = scsi_serial
[4 + i
];
806 if (cnt
== MAX_RAID_SERIAL_LEN
)
810 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
816 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
823 __u8 serial
[MAX_RAID_SERIAL_LEN
];
825 rv
= imsm_read_serial(fd
, devname
, serial
);
830 /* check if this is a disk we have seen before. it may be a spare in
831 * super->disks while the current anchor believes it is a raid member,
832 * check if we need to update dl->index
834 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
835 if (memcmp(dl
->serial
, serial
, MAX_RAID_SERIAL_LEN
) == 0)
839 dl
= malloc(sizeof(*dl
));
846 Name
": failed to allocate disk buffer for %s\n",
853 dl
->major
= major(stb
.st_rdev
);
854 dl
->minor
= minor(stb
.st_rdev
);
855 dl
->next
= super
->disks
;
856 dl
->fd
= keep_fd
? fd
: -1;
857 dl
->devname
= devname
? strdup(devname
) : NULL
;
858 strncpy((char *) dl
->serial
, (char *) serial
, MAX_RAID_SERIAL_LEN
);
859 } else if (keep_fd
) {
864 /* look up this disk's index in the current anchor */
865 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
866 struct imsm_disk
*disk_iter
;
868 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
870 if (memcmp(disk_iter
->serial
, dl
->serial
,
871 MAX_RAID_SERIAL_LEN
) == 0) {
874 dl
->disk
= *disk_iter
;
875 status
= __le32_to_cpu(dl
->disk
.status
);
876 /* only set index on disks that are a member of a
877 * populated contianer, i.e. one with raid_devs
879 if (status
& SPARE_DISK
)
887 if (i
== super
->anchor
->num_disks
&& alloc
) {
890 Name
": failed to load disk with serial \'%s\' for %s\n",
891 dl
->serial
, devname
);
895 if (i
== super
->anchor
->num_disks
&& dl
->index
>= 0) {
898 Name
": confused... disk %d with serial \'%s\' "
899 "is not listed in the current anchor\n",
900 dl
->index
, dl
->serial
);
910 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
916 for (i
= 0; i
< src
->vol
.map
[0].num_members
; i
++)
917 dest
->vol
.map
[0].disk_ord_tbl
[i
] = src
->vol
.map
[0].disk_ord_tbl
[i
];
919 if (!src
->vol
.migr_state
)
922 dest
->vol
.map
[1] = src
->vol
.map
[1];
923 for (i
= 0; i
< src
->vol
.map
[1].num_members
; i
++)
924 dest
->vol
.map
[1].disk_ord_tbl
[i
] = src
->vol
.map
[1].disk_ord_tbl
[i
];
927 static int parse_raid_devices(struct intel_super
*super
)
930 struct imsm_dev
*dev_new
;
933 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
934 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
936 len
= sizeof_imsm_dev(dev_iter
);
937 dev_new
= malloc(len
);
940 imsm_copy_dev(dev_new
, dev_iter
);
941 super
->dev_tbl
[i
] = dev_new
;
947 /* retrieve a pointer to the bbm log which starts after all raid devices */
948 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
952 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
954 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
960 static void __free_imsm(struct intel_super
*super
, int free_disks
);
962 /* load_imsm_mpb - read matrix metadata
963 * allocates super->mpb to be freed by free_super
965 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
967 unsigned long long dsize
;
968 unsigned long long sectors
;
970 struct imsm_super
*anchor
;
974 get_dev_size(fd
, NULL
, &dsize
);
976 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
979 Name
": Cannot seek to anchor block on %s: %s\n",
980 devname
, strerror(errno
));
984 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
987 Name
": Failed to allocate imsm anchor buffer"
988 " on %s\n", devname
);
991 if (read(fd
, anchor
, 512) != 512) {
994 Name
": Cannot read anchor block on %s: %s\n",
995 devname
, strerror(errno
));
1000 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1003 Name
": no IMSM anchor on %s\n", devname
);
1008 __free_imsm(super
, 0);
1009 super
->len
= __le32_to_cpu(anchor
->mpb_size
);
1010 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1011 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1014 Name
": unable to allocate %zu byte mpb buffer\n",
1019 memcpy(super
->buf
, anchor
, 512);
1021 sectors
= mpb_sectors(anchor
) - 1;
1024 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1026 rc
= parse_raid_devices(super
);
1030 /* read the extended mpb */
1031 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1034 Name
": Cannot seek to extended mpb on %s: %s\n",
1035 devname
, strerror(errno
));
1039 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1042 Name
": Cannot read extended mpb on %s: %s\n",
1043 devname
, strerror(errno
));
1047 check_sum
= __gen_imsm_checksum(super
->anchor
);
1048 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1051 Name
": IMSM checksum %x != %x on %s\n",
1052 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1057 /* FIXME the BBM log is disk specific so we cannot use this global
1058 * buffer for all disks. Ok for now since we only look at the global
1059 * bbm_log_size parameter to gate assembly
1061 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1063 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1065 rc
= parse_raid_devices(super
);
1069 static void free_imsm_disks(struct intel_super
*super
)
1071 while (super
->disks
) {
1072 struct dl
*d
= super
->disks
;
1074 super
->disks
= d
->next
;
1083 /* free all the pieces hanging off of a super pointer */
1084 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1093 free_imsm_disks(super
);
1094 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1095 if (super
->dev_tbl
[i
]) {
1096 free(super
->dev_tbl
[i
]);
1097 super
->dev_tbl
[i
] = NULL
;
1101 static void free_imsm(struct intel_super
*super
)
1103 __free_imsm(super
, 1);
1107 static void free_super_imsm(struct supertype
*st
)
1109 struct intel_super
*super
= st
->sb
;
1118 static struct intel_super
*alloc_super(int creating_imsm
)
1120 struct intel_super
*super
= malloc(sizeof(*super
));
1123 memset(super
, 0, sizeof(*super
));
1124 super
->creating_imsm
= creating_imsm
;
1125 super
->current_vol
= -1;
1132 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1133 char *devname
, int keep_fd
)
1136 struct intel_super
*super
;
1137 struct mdinfo
*sd
, *best
= NULL
;
1144 /* check if this disk is a member of an active array */
1145 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1149 if (sra
->array
.major_version
!= -1 ||
1150 sra
->array
.minor_version
!= -2 ||
1151 strcmp(sra
->text_version
, "imsm") != 0)
1154 super
= alloc_super(0);
1158 /* find the most up to date disk in this array, skipping spares */
1159 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1160 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1161 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1166 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1170 if (super
->anchor
->num_raid_devs
== 0)
1173 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1174 if (!best
|| gen
> bestgen
) {
1189 /* load the most up to date anchor */
1190 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1191 dfd
= dev_open(nm
, O_RDONLY
);
1196 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1203 /* re-parse the disk list with the current anchor */
1204 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1205 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1206 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1211 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1216 if (st
->subarray
[0]) {
1217 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1218 super
->current_vol
= atoi(st
->subarray
);
1224 if (st
->ss
== NULL
) {
1225 st
->ss
= &super_imsm
;
1226 st
->minor_version
= 0;
1227 st
->max_devs
= IMSM_MAX_DEVICES
;
1228 st
->container_dev
= fd2devnum(fd
);
1235 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1237 struct intel_super
*super
;
1241 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1244 if (st
->subarray
[0])
1245 return 1; /* FIXME */
1247 super
= alloc_super(0);
1250 Name
": malloc of %zu failed.\n",
1255 rv
= load_imsm_mpb(fd
, super
, devname
);
1260 Name
": Failed to load all information "
1261 "sections on %s\n", devname
);
1267 if (st
->ss
== NULL
) {
1268 st
->ss
= &super_imsm
;
1269 st
->minor_version
= 0;
1270 st
->max_devs
= IMSM_MAX_DEVICES
;
1276 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1278 if (info
->level
== 1)
1280 return info
->chunk_size
>> 9;
1283 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1287 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1288 if (info
->level
== 1)
1294 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1296 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1299 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1300 unsigned long long size
, char *name
,
1301 char *homehost
, int *uuid
)
1303 /* We are creating a volume inside a pre-existing container.
1304 * so st->sb is already set.
1306 struct intel_super
*super
= st
->sb
;
1307 struct imsm_super
*mpb
= super
->anchor
;
1308 struct imsm_dev
*dev
;
1309 struct imsm_vol
*vol
;
1310 struct imsm_map
*map
;
1311 int idx
= mpb
->num_raid_devs
;
1313 unsigned long long array_blocks
;
1315 size_t size_old
, size_new
;
1317 if (mpb
->num_raid_devs
>= 2) {
1318 fprintf(stderr
, Name
": This imsm-container already has the "
1319 "maximum of 2 volumes\n");
1323 /* ensure the mpb is large enough for the new data */
1324 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1325 size_new
= disks_to_mpb_size(info
->nr_disks
);
1326 if (size_new
> size_old
) {
1328 size_t size_round
= ROUND_UP(size_new
, 512);
1330 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1331 fprintf(stderr
, Name
": could not allocate new mpb\n");
1334 memcpy(mpb_new
, mpb
, size_old
);
1337 super
->anchor
= mpb_new
;
1338 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1339 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1341 super
->current_vol
= idx
;
1342 /* when creating the first raid device in this container set num_disks
1343 * to zero, i.e. delete this spare and add raid member devices in
1344 * add_to_super_imsm_volume()
1346 if (super
->current_vol
== 0)
1348 sprintf(st
->subarray
, "%d", idx
);
1349 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1351 fprintf(stderr
, Name
": could not allocate raid device\n");
1354 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1355 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1356 info
->layout
, info
->chunk_size
,
1358 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1359 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1360 dev
->status
= __cpu_to_le32(0);
1361 dev
->reserved_blocks
= __cpu_to_le32(0);
1363 vol
->migr_state
= 0;
1366 for (i
= 0; i
< idx
; i
++) {
1367 struct imsm_dev
*prev
= get_imsm_dev(super
, i
);
1368 struct imsm_map
*pmap
= &prev
->vol
.map
[0];
1370 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1371 offset
+= IMSM_RESERVED_SECTORS
;
1374 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1375 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1376 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1377 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1378 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1379 IMSM_T_STATE_NORMAL
;
1381 if (info
->level
== 1 && info
->raid_disks
> 2) {
1382 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1383 "in a raid1 volume\n");
1386 if (info
->level
== 10)
1387 map
->raid_level
= 1;
1389 map
->raid_level
= info
->level
;
1391 map
->num_members
= info
->raid_disks
;
1392 for (i
= 0; i
< map
->num_members
; i
++) {
1393 /* initialized in add_to_super */
1394 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1396 mpb
->num_raid_devs
++;
1397 super
->dev_tbl
[super
->current_vol
] = dev
;
1402 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1403 unsigned long long size
, char *name
,
1404 char *homehost
, int *uuid
)
1406 /* This is primarily called by Create when creating a new array.
1407 * We will then get add_to_super called for each component, and then
1408 * write_init_super called to write it out to each device.
1409 * For IMSM, Create can create on fresh devices or on a pre-existing
1411 * To create on a pre-existing array a different method will be called.
1412 * This one is just for fresh drives.
1414 struct intel_super
*super
;
1415 struct imsm_super
*mpb
;
1423 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1426 super
= alloc_super(1);
1429 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1430 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1435 memset(mpb
, 0, mpb_size
);
1437 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1438 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1439 strlen(MPB_VERSION_RAID5
));
1440 mpb
->mpb_size
= mpb_size
;
1446 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1447 int fd
, char *devname
)
1449 struct intel_super
*super
= st
->sb
;
1450 struct imsm_super
*mpb
= super
->anchor
;
1452 struct imsm_dev
*dev
;
1453 struct imsm_map
*map
;
1456 dev
= get_imsm_dev(super
, super
->current_vol
);
1457 map
= &dev
->vol
.map
[0];
1459 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1460 if (dl
->major
== dk
->major
&&
1461 dl
->minor
== dk
->minor
)
1464 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1467 /* add a pristine spare to the metadata */
1468 if (dl
->index
< 0) {
1469 dl
->index
= super
->anchor
->num_disks
;
1470 super
->anchor
->num_disks
++;
1472 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1473 status
= CONFIGURED_DISK
| USABLE_DISK
;
1474 dl
->disk
.status
= __cpu_to_le32(status
);
1476 /* if we are creating the first raid device update the family number */
1477 if (super
->current_vol
== 0) {
1479 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
1480 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
1484 sum
= __gen_imsm_checksum(mpb
);
1485 mpb
->family_num
= __cpu_to_le32(sum
);
1489 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1490 int fd
, char *devname
)
1492 struct intel_super
*super
= st
->sb
;
1494 unsigned long long size
;
1499 if (super
->current_vol
>= 0) {
1500 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1505 dd
= malloc(sizeof(*dd
));
1508 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1511 memset(dd
, 0, sizeof(*dd
));
1512 dd
->major
= major(stb
.st_rdev
);
1513 dd
->minor
= minor(stb
.st_rdev
);
1515 dd
->devname
= devname
? strdup(devname
) : NULL
;
1516 dd
->next
= super
->disks
;
1518 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1521 Name
": failed to retrieve scsi serial, aborting\n");
1526 get_dev_size(fd
, NULL
, &size
);
1528 status
= USABLE_DISK
| SPARE_DISK
;
1529 strcpy((char *) dd
->disk
.serial
, (char *) dd
->serial
);
1530 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
1531 dd
->disk
.status
= __cpu_to_le32(status
);
1532 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1533 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
1535 dd
->disk
.scsi_id
= __cpu_to_le32(0);
1539 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1541 /* spare records have their own family number and do not have any defined raid
1544 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
1546 struct imsm_super mpb_save
;
1547 struct imsm_super
*mpb
= super
->anchor
;
1552 mpb
->num_raid_devs
= 0;
1554 mpb
->mpb_size
= sizeof(struct imsm_super
);
1555 mpb
->generation_num
= __cpu_to_le32(1UL);
1557 for (d
= super
->disks
; d
; d
= d
->next
) {
1561 mpb
->disk
[0] = d
->disk
;
1562 sum
= __gen_imsm_checksum(mpb
);
1563 mpb
->family_num
= __cpu_to_le32(sum
);
1564 sum
= __gen_imsm_checksum(mpb
);
1565 mpb
->check_sum
= __cpu_to_le32(sum
);
1567 if (store_imsm_mpb(d
->fd
, super
)) {
1568 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1569 __func__
, d
->major
, d
->minor
, strerror(errno
));
1583 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1585 struct imsm_super
*mpb
= super
->anchor
;
1593 /* 'generation' is incremented everytime the metadata is written */
1594 generation
= __le32_to_cpu(mpb
->generation_num
);
1596 mpb
->generation_num
= __cpu_to_le32(generation
);
1598 for (d
= super
->disks
; d
; d
= d
->next
) {
1603 mpb
->disk
[d
->index
] = d
->disk
;
1606 if (raid_disks
!= mpb
->num_disks
) {
1607 fprintf(stderr
, "%s: expected %d disks only found %d\n",
1608 __func__
, mpb
->num_disks
, raid_disks
);
1612 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1613 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1615 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
1618 /* recalculate checksum */
1619 sum
= __gen_imsm_checksum(mpb
);
1620 mpb
->check_sum
= __cpu_to_le32(sum
);
1622 /* write the mpb for disks that compose raid devices */
1623 for (d
= super
->disks
; d
; d
= d
->next
) {
1626 if (store_imsm_mpb(d
->fd
, super
)) {
1627 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1628 __func__
, d
->major
, d
->minor
, strerror(errno
));
1638 return write_super_imsm_spares(super
, doclose
);
1643 static int write_init_super_imsm(struct supertype
*st
)
1645 if (st
->update_tail
) {
1646 /* queue the recently created array as a metadata update */
1648 struct imsm_update_create_array
*u
;
1649 struct intel_super
*super
= st
->sb
;
1650 struct imsm_dev
*dev
;
1653 if (super
->current_vol
< 0 ||
1654 !(dev
= get_imsm_dev(super
, super
->current_vol
))) {
1655 fprintf(stderr
, "%s: could not determine sub-array\n",
1661 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
);
1664 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1669 u
->type
= update_create_array
;
1670 u
->dev_idx
= super
->current_vol
;
1671 imsm_copy_dev(&u
->dev
, dev
);
1672 append_metadata_update(st
, u
, len
);
1674 for (d
= super
->disks
; d
; d
= d
->next
) {
1681 return write_super_imsm(st
->sb
, 1);
1684 static int store_zero_imsm(struct supertype
*st
, int fd
)
1686 unsigned long long dsize
;
1689 get_dev_size(fd
, NULL
, &dsize
);
1691 /* first block is stored on second to last sector of the disk */
1692 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1695 if (posix_memalign(&buf
, 512, 512) != 0)
1698 memset(buf
, 0, 512);
1699 if (write(fd
, buf
, 512) != 512)
1704 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1705 int layout
, int raiddisks
, int chunk
,
1706 unsigned long long size
, char *dev
,
1707 unsigned long long *freesize
,
1711 unsigned long long ldsize
;
1713 if (level
!= LEVEL_CONTAINER
)
1718 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1721 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1722 dev
, strerror(errno
));
1725 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1731 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1736 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1737 * FIX ME add ahci details
1739 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1740 int layout
, int raiddisks
, int chunk
,
1741 unsigned long long size
, char *dev
,
1742 unsigned long long *freesize
,
1746 struct intel_super
*super
= st
->sb
;
1748 unsigned long long pos
= 0;
1749 unsigned long long maxsize
;
1753 if (level
== LEVEL_CONTAINER
)
1756 if (level
== 1 && raiddisks
> 2) {
1758 fprintf(stderr
, Name
": imsm does not support more "
1759 "than 2 in a raid1 configuration\n");
1763 /* We must have the container info already read in. */
1768 /* General test: make sure there is space for
1769 * 'raiddisks' device extents of size 'size' at a given
1772 unsigned long long minsize
= size
*2 /* convert to blocks */;
1773 unsigned long long start_offset
= ~0ULL;
1776 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1777 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1782 e
= get_extents(super
, dl
);
1785 unsigned long long esize
;
1786 esize
= e
[i
].start
- pos
;
1787 if (esize
>= minsize
)
1789 if (found
&& start_offset
== ~0ULL) {
1792 } else if (found
&& pos
!= start_offset
) {
1796 pos
= e
[i
].start
+ e
[i
].size
;
1798 } while (e
[i
-1].size
);
1803 if (dcnt
< raiddisks
) {
1805 fprintf(stderr
, Name
": imsm: Not enough "
1806 "devices with space for this array "
1813 /* This device must be a member of the set */
1814 if (stat(dev
, &stb
) < 0)
1816 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1818 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1819 if (dl
->major
== major(stb
.st_rdev
) &&
1820 dl
->minor
== minor(stb
.st_rdev
))
1825 fprintf(stderr
, Name
": %s is not in the "
1826 "same imsm set\n", dev
);
1829 e
= get_extents(super
, dl
);
1833 unsigned long long esize
;
1834 esize
= e
[i
].start
- pos
;
1835 if (esize
>= maxsize
)
1837 pos
= e
[i
].start
+ e
[i
].size
;
1839 } while (e
[i
-1].size
);
1840 *freesize
= maxsize
;
1845 int imsm_bbm_log_size(struct imsm_super
*mpb
)
1847 return __le32_to_cpu(mpb
->bbm_log_size
);
1850 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1851 int raiddisks
, int chunk
, unsigned long long size
,
1852 char *dev
, unsigned long long *freesize
,
1858 /* if given unused devices create a container
1859 * if given given devices in a container create a member volume
1861 if (level
== LEVEL_CONTAINER
) {
1862 /* Must be a fresh device to add to a container */
1863 return validate_geometry_imsm_container(st
, level
, layout
,
1864 raiddisks
, chunk
, size
,
1870 /* creating in a given container */
1871 return validate_geometry_imsm_volume(st
, level
, layout
,
1872 raiddisks
, chunk
, size
,
1873 dev
, freesize
, verbose
);
1876 /* limit creation to the following levels */
1888 /* This device needs to be a device in an 'imsm' container */
1889 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1893 Name
": Cannot create this array on device %s\n",
1898 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
1900 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1901 dev
, strerror(errno
));
1904 /* Well, it is in use by someone, maybe an 'imsm' container. */
1905 cfd
= open_container(fd
);
1909 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
1913 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
1915 if (sra
&& sra
->array
.major_version
== -1 &&
1916 strcmp(sra
->text_version
, "imsm") == 0) {
1917 /* This is a member of a imsm container. Load the container
1918 * and try to create a volume
1920 struct intel_super
*super
;
1922 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
1924 st
->container_dev
= fd2devnum(cfd
);
1926 return validate_geometry_imsm_volume(st
, level
, layout
,
1932 } else /* may belong to another container */
1938 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
1940 /* Given a container loaded by load_super_imsm_all,
1941 * extract information about all the arrays into
1944 * For each imsm_dev create an mdinfo, fill it in,
1945 * then look for matching devices in super->disks
1946 * and create appropriate device mdinfo.
1948 struct intel_super
*super
= st
->sb
;
1949 struct imsm_super
*mpb
= super
->anchor
;
1950 struct mdinfo
*rest
= NULL
;
1953 /* do not assemble arrays that might have bad blocks */
1954 if (imsm_bbm_log_size(super
->anchor
)) {
1955 fprintf(stderr
, Name
": BBM log found in metadata. "
1956 "Cannot activate array(s).\n");
1960 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1961 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
1962 struct imsm_vol
*vol
= &dev
->vol
;
1963 struct imsm_map
*map
= vol
->map
;
1964 struct mdinfo
*this;
1967 this = malloc(sizeof(*this));
1968 memset(this, 0, sizeof(*this));
1972 this->array
.level
= get_imsm_raid_level(map
);
1973 this->array
.raid_disks
= map
->num_members
;
1974 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
1975 this->array
.md_minor
= -1;
1976 this->array
.ctime
= 0;
1977 this->array
.utime
= 0;
1978 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1979 this->array
.state
= !vol
->dirty
;
1980 this->container_member
= i
;
1981 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1982 this->resync_start
= 0;
1984 this->resync_start
= ~0ULL;
1986 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1987 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
1989 sprintf(this->text_version
, "/%s/%d",
1990 devnum2devname(st
->container_dev
),
1991 this->container_member
);
1993 memset(this->uuid
, 0, sizeof(this->uuid
));
1995 this->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1997 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
1998 struct mdinfo
*info_d
;
2003 idx
= get_imsm_disk_idx(map
, slot
);
2004 for (d
= super
->disks
; d
; d
= d
->next
)
2005 if (d
->index
== idx
)
2009 break; /* shouldn't this be continue ?? */
2011 info_d
= malloc(sizeof(*info_d
));
2013 break; /* ditto ?? */
2014 memset(info_d
, 0, sizeof(*info_d
));
2015 info_d
->next
= this->devs
;
2016 this->devs
= info_d
;
2018 s
= __le32_to_cpu(d
->disk
.status
);
2020 info_d
->disk
.number
= d
->index
;
2021 info_d
->disk
.major
= d
->major
;
2022 info_d
->disk
.minor
= d
->minor
;
2023 info_d
->disk
.raid_disk
= slot
;
2024 info_d
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
2025 info_d
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
2026 info_d
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
2028 this->array
.working_disks
++;
2030 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
2031 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2032 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2034 strcpy(info_d
->name
, d
->devname
);
2042 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
2045 struct intel_super
*super
= c
->sb
;
2046 struct imsm_super
*mpb
= super
->anchor
;
2048 if (atoi(inst
) >= mpb
->num_raid_devs
) {
2049 fprintf(stderr
, "%s: subarry index %d, out of range\n",
2050 __func__
, atoi(inst
));
2054 dprintf("imsm: open_new %s\n", inst
);
2055 a
->info
.container_member
= atoi(inst
);
2059 static __u8
imsm_check_degraded(struct intel_super
*super
, int n
, int failed
)
2061 struct imsm_dev
*dev
= get_imsm_dev(super
, n
);
2062 struct imsm_map
*map
= dev
->vol
.map
;
2065 return map
->map_state
;
2067 switch (get_imsm_raid_level(map
)) {
2069 return IMSM_T_STATE_FAILED
;
2072 if (failed
< map
->num_members
)
2073 return IMSM_T_STATE_DEGRADED
;
2075 return IMSM_T_STATE_FAILED
;
2080 * check to see if any mirrors have failed,
2081 * otherwise we are degraded
2083 int device_per_mirror
= 2; /* FIXME is this always the case?
2084 * and are they always adjacent?
2089 for (i
= 0; i
< map
->num_members
; i
++) {
2090 int idx
= get_imsm_disk_idx(map
, i
);
2091 struct imsm_disk
*disk
= get_imsm_disk(super
, idx
);
2093 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2096 if (failed
>= device_per_mirror
)
2097 return IMSM_T_STATE_FAILED
;
2099 /* reset 'failed' for next mirror set */
2100 if (!((i
+ 1) % device_per_mirror
))
2104 return IMSM_T_STATE_DEGRADED
;
2108 return IMSM_T_STATE_DEGRADED
;
2110 return IMSM_T_STATE_FAILED
;
2116 return map
->map_state
;
2119 static int imsm_count_failed(struct intel_super
*super
, struct imsm_map
*map
)
2123 struct imsm_disk
*disk
;
2125 for (i
= 0; i
< map
->num_members
; i
++) {
2126 int idx
= get_imsm_disk_idx(map
, i
);
2128 disk
= get_imsm_disk(super
, idx
);
2129 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
2136 static void imsm_set_array_state(struct active_array
*a
, int consistent
)
2138 int inst
= a
->info
.container_member
;
2139 struct intel_super
*super
= a
->container
->sb
;
2140 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2141 struct imsm_map
*map
= &dev
->vol
.map
[0];
2142 int dirty
= !consistent
;
2146 if (a
->resync_start
== ~0ULL) {
2147 failed
= imsm_count_failed(super
, map
);
2148 map_state
= imsm_check_degraded(super
, inst
, failed
);
2149 /* complete recovery or initial resync */
2151 map_state
= IMSM_T_STATE_NORMAL
;
2152 if (map
->map_state
!= map_state
) {
2153 dprintf("imsm: map_state %d: %d\n",
2155 map
->map_state
= map_state
;
2156 super
->updates_pending
++;
2159 /* complete resync */
2160 if (!dirty
&& dev
->vol
.dirty
) {
2161 dprintf("imsm: mark 'clean'\n");
2163 super
->updates_pending
++;
2169 if (dirty
&& !dev
->vol
.dirty
) {
2170 dprintf("imsm: mark 'dirty' (%llu)\n", a
->resync_start
);
2172 super
->updates_pending
++;
2176 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2178 int inst
= a
->info
.container_member
;
2179 struct intel_super
*super
= a
->container
->sb
;
2180 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2181 struct imsm_map
*map
= dev
->vol
.map
;
2182 struct imsm_disk
*disk
;
2185 int new_failure
= 0;
2187 if (n
> map
->num_members
)
2188 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2189 n
, map
->num_members
- 1);
2194 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2196 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, n
));
2198 /* check for new failures */
2199 status
= __le32_to_cpu(disk
->status
);
2200 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
2201 status
|= FAILED_DISK
;
2202 disk
->status
= __cpu_to_le32(status
);
2204 super
->updates_pending
++;
2206 /* check if in_sync */
2207 if ((state
& DS_INSYNC
) && !(status
& USABLE_DISK
)) {
2208 status
|= USABLE_DISK
;
2209 disk
->status
= __cpu_to_le32(status
);
2210 super
->updates_pending
++;
2213 /* the number of failures have changed, count up 'failed' to determine
2214 * degraded / failed status
2216 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
2217 failed
= imsm_count_failed(super
, map
);
2219 /* determine map_state based on failed or in_sync count */
2221 map
->map_state
= imsm_check_degraded(super
, inst
, failed
);
2222 else if (map
->map_state
== IMSM_T_STATE_DEGRADED
) {
2226 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2227 if (d
->curr_state
& DS_INSYNC
)
2230 if (working
== a
->info
.array
.raid_disks
) {
2231 map
->map_state
= IMSM_T_STATE_NORMAL
;
2232 super
->updates_pending
++;
2237 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2239 struct imsm_super
*mpb
= super
->anchor
;
2240 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2241 unsigned long long dsize
;
2242 unsigned long long sectors
;
2244 get_dev_size(fd
, NULL
, &dsize
);
2246 if (mpb_size
> 512) {
2247 /* -1 to account for anchor */
2248 sectors
= mpb_sectors(mpb
) - 1;
2250 /* write the extended mpb to the sectors preceeding the anchor */
2251 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
2254 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
2258 /* first block is stored on second to last sector of the disk */
2259 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2262 if (write(fd
, super
->buf
, 512) != 512)
2268 static void imsm_sync_metadata(struct supertype
*container
)
2270 struct intel_super
*super
= container
->sb
;
2272 if (!super
->updates_pending
)
2275 write_super_imsm(super
, 0);
2277 super
->updates_pending
= 0;
2280 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
2281 struct metadata_update
**updates
)
2284 * Find a device with unused free space and use it to replace a
2285 * failed/vacant region in an array. We replace failed regions one a
2286 * array at a time. The result is that a new spare disk will be added
2287 * to the first failed array and after the monitor has finished
2288 * propagating failures the remainder will be consumed.
2290 * FIXME add a capability for mdmon to request spares from another
2294 struct intel_super
*super
= a
->container
->sb
;
2295 int inst
= a
->info
.container_member
;
2296 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2297 struct imsm_map
*map
= dev
->vol
.map
;
2298 int failed
= a
->info
.array
.raid_disks
;
2299 struct mdinfo
*rv
= NULL
;
2302 struct metadata_update
*mu
;
2304 struct imsm_update_activate_spare
*u
;
2308 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2309 if ((d
->curr_state
& DS_FAULTY
) &&
2311 /* wait for Removal to happen */
2313 if (d
->state_fd
>= 0)
2317 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2318 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2319 if (imsm_check_degraded(super
, inst
, failed
) != IMSM_T_STATE_DEGRADED
)
2322 /* For each slot, if it is not working, find a spare */
2324 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2325 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2326 if (d
->disk
.raid_disk
== i
)
2328 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2329 if (d
&& (d
->state_fd
>= 0))
2332 /* OK, this device needs recovery. Find a spare */
2333 for ( ; dl
; dl
= dl
->next
) {
2334 unsigned long long esize
;
2335 unsigned long long pos
;
2342 /* If in this array, skip */
2343 for (d2
= a
->info
.devs
; d2
; d2
= d2
->next
)
2344 if (d2
->disk
.major
== dl
->major
&&
2345 d2
->disk
.minor
== dl
->minor
) {
2346 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2352 /* Does this unused device have the requisite free space?
2353 * We need a->info.component_size sectors
2355 ex
= get_extents(super
, dl
);
2357 dprintf("cannot get extents\n");
2363 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2366 /* check that we can start at pba_of_lba0 with
2367 * a->info.component_size of space
2369 esize
= ex
[j
].start
- pos
;
2370 if (array_start
>= pos
&&
2371 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2375 pos
= ex
[j
].start
+ ex
[j
].size
;
2378 } while (ex
[j
-1].size
);
2382 dprintf("%x:%x does not have %llu at %d\n",
2383 dl
->major
, dl
->minor
,
2384 a
->info
.component_size
,
2385 __le32_to_cpu(map
->pba_of_lba0
));
2390 /* found a usable disk with enough space */
2391 di
= malloc(sizeof(*di
));
2392 memset(di
, 0, sizeof(*di
));
2394 /* dl->index will be -1 in the case we are activating a
2395 * pristine spare. imsm_process_update() will create a
2396 * new index in this case. Once a disk is found to be
2397 * failed in all member arrays it is kicked from the
2400 di
->disk
.number
= dl
->index
;
2402 /* (ab)use di->devs to store a pointer to the device
2405 di
->devs
= (struct mdinfo
*) dl
;
2407 di
->disk
.raid_disk
= i
;
2408 di
->disk
.major
= dl
->major
;
2409 di
->disk
.minor
= dl
->minor
;
2411 di
->data_offset
= array_start
;
2412 di
->component_size
= a
->info
.component_size
;
2413 di
->container_member
= inst
;
2417 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2425 /* No spares found */
2427 /* Now 'rv' has a list of devices to return.
2428 * Create a metadata_update record to update the
2429 * disk_ord_tbl for the array
2431 mu
= malloc(sizeof(*mu
));
2432 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2434 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2435 mu
->next
= *updates
;
2436 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2438 for (di
= rv
; di
; di
= di
->next
) {
2439 u
->type
= update_activate_spare
;
2440 u
->dl
= (struct dl
*) di
->devs
;
2442 u
->slot
= di
->disk
.raid_disk
;
2453 static int disks_overlap(struct imsm_map
*m1
, struct imsm_map
*m2
)
2459 for (i
= 0; i
< m1
->num_members
; i
++) {
2460 idx
= get_imsm_disk_idx(m1
, i
);
2461 for (j
= 0; j
< m2
->num_members
; j
++)
2462 if (idx
== get_imsm_disk_idx(m2
, j
))
2469 static void imsm_process_update(struct supertype
*st
,
2470 struct metadata_update
*update
)
2473 * crack open the metadata_update envelope to find the update record
2474 * update can be one of:
2475 * update_activate_spare - a spare device has replaced a failed
2476 * device in an array, update the disk_ord_tbl. If this disk is
2477 * present in all member arrays then also clear the SPARE_DISK
2480 struct intel_super
*super
= st
->sb
;
2481 struct imsm_super
*mpb
= super
->anchor
;
2482 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2485 case update_activate_spare
: {
2486 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
2487 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
2488 struct imsm_map
*map
= &dev
->vol
.map
[0];
2489 struct active_array
*a
;
2490 struct imsm_disk
*disk
;
2497 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2502 fprintf(stderr
, "error: imsm_activate_spare passed "
2503 "an unknown disk (index: %d serial: %s)\n",
2504 u
->dl
->index
, u
->dl
->serial
);
2508 super
->updates_pending
++;
2510 /* adding a pristine spare, assign a new index */
2511 if (dl
->index
< 0) {
2512 dl
->index
= super
->anchor
->num_disks
;
2513 super
->anchor
->num_disks
++;
2515 victim
= get_imsm_disk_idx(map
, u
->slot
);
2516 map
->disk_ord_tbl
[u
->slot
] = __cpu_to_le32(dl
->index
);
2518 status
= __le32_to_cpu(disk
->status
);
2519 status
|= CONFIGURED_DISK
;
2520 status
&= ~(SPARE_DISK
| USABLE_DISK
);
2521 disk
->status
= __cpu_to_le32(status
);
2523 /* count arrays using the victim in the metadata */
2525 for (a
= st
->arrays
; a
; a
= a
->next
) {
2526 dev
= get_imsm_dev(super
, a
->info
.container_member
);
2527 map
= &dev
->vol
.map
[0];
2528 for (i
= 0; i
< map
->num_members
; i
++)
2529 if (victim
== get_imsm_disk_idx(map
, i
))
2533 /* clear some flags if the victim is no longer being
2537 disk
= get_imsm_disk(super
, victim
);
2538 status
= __le32_to_cpu(disk
->status
);
2539 status
&= ~(CONFIGURED_DISK
| USABLE_DISK
);
2540 disk
->status
= __cpu_to_le32(status
);
2541 /* at this point the disk can be removed from the
2542 * metadata, however we need to guarantee that we do
2543 * not race with any manager thread routine that relies
2544 * on dl->index or map->disk_ord_tbl
2549 case update_create_array
: {
2550 /* someone wants to create a new array, we need to be aware of
2551 * a few races/collisions:
2552 * 1/ 'Create' called by two separate instances of mdadm
2553 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
2554 * devices that have since been assimilated via
2556 * In the event this update can not be carried out mdadm will
2557 * (FIX ME) notice that its update did not take hold.
2559 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2560 struct imsm_dev
*dev
;
2561 struct imsm_map
*map
, *new_map
;
2562 unsigned long long start
, end
;
2563 unsigned long long new_start
, new_end
;
2567 /* handle racing creates: first come first serve */
2568 if (u
->dev_idx
< mpb
->num_raid_devs
) {
2569 dprintf("%s: subarray %d already defined\n",
2570 __func__
, u
->dev_idx
);
2574 /* check update is next in sequence */
2575 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
2576 dprintf("%s: can not create arrays out of sequence\n",
2581 new_map
= &u
->dev
.vol
.map
[0];
2582 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
2583 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
2585 /* handle activate_spare versus create race:
2586 * check to make sure that overlapping arrays do not include
2589 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2590 dev
= get_imsm_dev(super
, i
);
2591 map
= &dev
->vol
.map
[0];
2592 start
= __le32_to_cpu(map
->pba_of_lba0
);
2593 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
2594 if ((new_start
>= start
&& new_start
<= end
) ||
2595 (start
>= new_start
&& start
<= new_end
))
2597 if (overlap
&& disks_overlap(map
, new_map
)) {
2598 dprintf("%s: arrays overlap\n", __func__
);
2602 /* check num_members sanity */
2603 if (new_map
->num_members
> mpb
->num_disks
) {
2604 dprintf("%s: num_disks out of range\n", __func__
);
2608 /* check that prepare update was successful */
2609 if (!update
->space
) {
2610 dprintf("%s: prepare update failed\n", __func__
);
2614 super
->updates_pending
++;
2615 dev
= update
->space
;
2616 update
->space
= NULL
;
2617 imsm_copy_dev(dev
, &u
->dev
);
2618 super
->dev_tbl
[u
->dev_idx
] = dev
;
2619 mpb
->num_raid_devs
++;
2621 /* fix up flags, if arrays overlap then the drives can not be
2624 for (i
= 0; i
< map
->num_members
; i
++) {
2625 struct imsm_disk
*disk
;
2628 disk
= get_imsm_disk(super
, get_imsm_disk_idx(map
, i
));
2629 status
= __le32_to_cpu(disk
->status
);
2630 status
|= CONFIGURED_DISK
;
2632 status
&= ~SPARE_DISK
;
2633 disk
->status
= __cpu_to_le32(status
);
2640 static void imsm_prepare_update(struct supertype
*st
,
2641 struct metadata_update
*update
)
2644 * Allocate space to hold new disk entries, raid-device entries or a
2645 * new mpb if necessary. We currently maintain an mpb large enough to
2646 * hold 2 subarrays for the given number of disks. This may not be
2647 * sufficient when reshaping.
2649 * FIX ME handle the reshape case.
2651 * The monitor will be able to safely change super->mpb by arranging
2652 * for it to be freed in check_update_queue(). I.e. the monitor thread
2653 * will start using the new pointer and the manager can continue to use
2654 * the old value until check_update_queue() runs.
2656 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2659 case update_create_array
: {
2660 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2661 size_t len
= sizeof_imsm_dev(&u
->dev
);
2663 update
->space
= malloc(len
);
2673 struct superswitch super_imsm
= {
2675 .examine_super
= examine_super_imsm
,
2676 .brief_examine_super
= brief_examine_super_imsm
,
2677 .detail_super
= detail_super_imsm
,
2678 .brief_detail_super
= brief_detail_super_imsm
,
2679 .write_init_super
= write_init_super_imsm
,
2681 .match_home
= match_home_imsm
,
2682 .uuid_from_super
= uuid_from_super_imsm
,
2683 .getinfo_super
= getinfo_super_imsm
,
2684 .update_super
= update_super_imsm
,
2686 .avail_size
= avail_size_imsm
,
2688 .compare_super
= compare_super_imsm
,
2690 .load_super
= load_super_imsm
,
2691 .init_super
= init_super_imsm
,
2692 .add_to_super
= add_to_super_imsm
,
2693 .store_super
= store_zero_imsm
,
2694 .free_super
= free_super_imsm
,
2695 .match_metadata_desc
= match_metadata_desc_imsm
,
2696 .container_content
= container_content_imsm
,
2698 .validate_geometry
= validate_geometry_imsm
,
2702 .open_new
= imsm_open_new
,
2703 .load_super
= load_super_imsm
,
2704 .set_array_state
= imsm_set_array_state
,
2705 .set_disk
= imsm_set_disk
,
2706 .sync_metadata
= imsm_sync_metadata
,
2707 .activate_spare
= imsm_activate_spare
,
2708 .process_update
= imsm_process_update
,
2709 .prepare_update
= imsm_prepare_update
,