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 reserved
[2]; /* 0x30 - 0x37 */
104 __u8 num_disks
; /* 0x38 Number of configured disks */
105 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
106 __u8 fill
[2]; /* 0x3A - 0x3B */
107 #define IMSM_FILLERS 39
108 __u32 filler
[IMSM_FILLERS
]; /* 0x3C - 0xD7 RAID_MPB_FILLERS */
109 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
110 /* here comes imsm_dev[num_raid_devs] */
111 } __attribute__ ((packed
));
114 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
117 static unsigned int sector_count(__u32 bytes
)
119 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
122 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
124 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
127 /* internal representation of IMSM metadata */
130 struct imsm_super
*mpb
;
133 int updates_pending
; /* count of pending updates for mdmon */
134 int creating_imsm
; /* flag to indicate container creation */
135 int current_vol
; /* index of raid device undergoing creation */
139 __u8 serial
[MAX_RAID_SERIAL_LEN
];
147 unsigned long long start
, size
;
150 /* definition of messages passed to imsm_process_update */
151 enum imsm_update_type
{
152 update_activate_spare
,
156 struct imsm_update_activate_spare
{
157 enum imsm_update_type type
;
161 struct imsm_update_activate_spare
*next
;
164 struct imsm_update_create_array
{
165 enum imsm_update_type type
;
170 static int imsm_env_devname_as_serial(void)
172 char *val
= getenv("IMSM_DEVNAME_AS_SERIAL");
174 if (val
&& atoi(val
) == 1)
181 static struct supertype
*match_metadata_desc_imsm(char *arg
)
183 struct supertype
*st
;
185 if (strcmp(arg
, "imsm") != 0 &&
186 strcmp(arg
, "default") != 0
190 st
= malloc(sizeof(*st
));
191 memset(st
, 0, sizeof(*st
));
192 st
->ss
= &super_imsm
;
193 st
->max_devs
= IMSM_MAX_DEVICES
;
194 st
->minor_version
= 0;
199 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
201 return &mpb
->sig
[MPB_SIG_LEN
];
204 static struct imsm_disk
*get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
206 if (index
> mpb
->num_disks
- 1)
208 return &mpb
->disk
[index
];
211 static __u32
gen_imsm_checksum(struct imsm_super
*mpb
)
213 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
214 __u32
*p
= (__u32
*) mpb
;
218 sum
+= __le32_to_cpu(*p
++);
220 return sum
- __le32_to_cpu(mpb
->check_sum
);
223 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
)
225 size_t size
= sizeof(*dev
);
227 /* each map has disk_ord_tbl[num_members - 1] additional space */
228 size
+= sizeof(__u32
) * (dev
->vol
.map
[0].num_members
- 1);
230 /* migrating means an additional map */
231 if (dev
->vol
.migr_state
) {
232 size
+= sizeof(struct imsm_map
);
233 size
+= sizeof(__u32
) * (dev
->vol
.map
[1].num_members
- 1);
239 static struct imsm_dev
*get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
245 if (index
> mpb
->num_raid_devs
- 1)
248 /* devices start after all disks */
249 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
251 for (i
= 0; i
<= index
; i
++)
253 return _mpb
+ offset
;
255 offset
+= sizeof_imsm_dev(_mpb
+ offset
);
260 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
262 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
264 /* top byte is 'special' */
265 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
268 static int get_imsm_raid_level(struct imsm_map
*map
)
270 if (map
->raid_level
== 1) {
271 if (map
->num_members
== 2)
277 return map
->raid_level
;
280 static int cmp_extent(const void *av
, const void *bv
)
282 const struct extent
*a
= av
;
283 const struct extent
*b
= bv
;
284 if (a
->start
< b
->start
)
286 if (a
->start
> b
->start
)
291 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
293 /* find a list of used extents on the given physical device */
294 struct imsm_super
*mpb
= super
->mpb
;
295 struct imsm_disk
*disk
;
296 struct extent
*rv
, *e
;
300 disk
= get_imsm_disk(mpb
, dl
->index
);
304 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
305 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
306 struct imsm_map
*map
= dev
->vol
.map
;
308 for (j
= 0; j
< map
->num_members
; j
++) {
309 __u32 index
= get_imsm_disk_idx(map
, j
);
311 if (index
== dl
->index
)
315 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
320 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
321 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
322 struct imsm_map
*map
= dev
->vol
.map
;
324 for (j
= 0; j
< map
->num_members
; j
++) {
325 __u32 index
= get_imsm_disk_idx(map
, j
);
327 if (index
== dl
->index
) {
328 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
329 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
334 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
336 e
->start
= __le32_to_cpu(disk
->total_blocks
) -
337 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
343 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
347 struct imsm_map
*map
= dev
->vol
.map
;
350 printf("[%s]:\n", dev
->volume
);
351 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
352 printf(" Members : %d\n", map
->num_members
);
353 for (slot
= 0; slot
< map
->num_members
; slot
++)
354 if (index
== get_imsm_disk_idx(map
, slot
))
356 if (slot
< map
->num_members
)
357 printf(" This Slot : %d\n", slot
);
359 printf(" This Slot : ?\n");
360 sz
= __le32_to_cpu(dev
->size_high
);
362 sz
+= __le32_to_cpu(dev
->size_low
);
363 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
364 human_size(sz
* 512));
365 sz
= __le32_to_cpu(map
->blocks_per_member
);
366 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
367 human_size(sz
* 512));
368 printf(" Sector Offset : %u\n",
369 __le32_to_cpu(map
->pba_of_lba0
));
370 printf(" Num Stripes : %u\n",
371 __le32_to_cpu(map
->num_data_stripes
));
372 printf(" Chunk Size : %u KiB\n",
373 __le16_to_cpu(map
->blocks_per_strip
) / 2);
374 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
375 printf(" Migrate State : %s\n", dev
->vol
.migr_state
? "migrating" : "idle");
376 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
377 printf(" Map State : %s\n", map_state_str
[map
->map_state
]);
380 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
382 struct imsm_disk
*disk
= get_imsm_disk(mpb
, index
);
383 char str
[MAX_RAID_SERIAL_LEN
];
391 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
392 printf(" Disk%02d Serial : %s\n", index
, str
);
393 s
= __le32_to_cpu(disk
->status
);
394 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
395 s
&CONFIGURED_DISK
? " active" : "",
396 s
&FAILED_DISK
? " failed" : "",
397 s
&USABLE_DISK
? " usable" : "");
398 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
399 sz
= __le32_to_cpu(disk
->total_blocks
) -
400 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
401 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
402 human_size(sz
* 512));
405 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
407 struct intel_super
*super
= st
->sb
;
408 struct imsm_super
*mpb
= super
->mpb
;
409 char str
[MAX_SIGNATURE_LENGTH
];
413 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
414 printf(" Magic : %s\n", str
);
415 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
416 printf(" Version : %s\n", get_imsm_version(mpb
));
417 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
418 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
419 sum
= __le32_to_cpu(mpb
->check_sum
);
420 printf(" Checksum : %08x %s\n", sum
,
421 gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
422 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
423 printf(" Disks : %d\n", mpb
->num_disks
);
424 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
425 print_imsm_disk(mpb
, super
->disks
->index
);
426 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
427 print_imsm_dev(get_imsm_dev(mpb
, i
), super
->disks
->index
);
428 for (i
= 0; i
< mpb
->num_disks
; i
++) {
429 if (i
== super
->disks
->index
)
431 print_imsm_disk(mpb
, i
);
435 static void brief_examine_super_imsm(struct supertype
*st
)
437 struct intel_super
*super
= st
->sb
;
438 struct imsm_super
*mpb
= super
->mpb
;
440 printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
441 __le32_to_cpu(mpb
->family_num
));
444 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
446 printf("%s\n", __FUNCTION__
);
449 static void brief_detail_super_imsm(struct supertype
*st
)
451 printf("%s\n", __FUNCTION__
);
455 static int match_home_imsm(struct supertype
*st
, char *homehost
)
457 printf("%s\n", __FUNCTION__
);
462 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
464 printf("%s\n", __FUNCTION__
);
469 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
471 __u8
*v
= get_imsm_version(mpb
);
472 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
473 char major
[] = { 0, 0, 0 };
474 char minor
[] = { 0 ,0, 0 };
475 char patch
[] = { 0, 0, 0 };
476 char *ver_parse
[] = { major
, minor
, patch
};
480 while (*v
!= '\0' && v
< end
) {
481 if (*v
!= '.' && j
< 2)
482 ver_parse
[i
][j
++] = *v
;
490 *m
= strtol(minor
, NULL
, 0);
491 *p
= strtol(patch
, NULL
, 0);
495 static int imsm_level_to_layout(int level
)
503 return ALGORITHM_LEFT_SYMMETRIC
;
505 return 0x102; //FIXME is this correct?
510 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
512 struct intel_super
*super
= st
->sb
;
513 struct imsm_super
*mpb
= super
->mpb
;
514 struct imsm_dev
*dev
= get_imsm_dev(mpb
, super
->current_vol
);
515 struct imsm_map
*map
= &dev
->vol
.map
[0];
517 info
->container_member
= super
->current_vol
;
518 info
->array
.raid_disks
= map
->num_members
;
519 info
->array
.level
= get_imsm_raid_level(map
);
520 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
521 info
->array
.md_minor
= -1;
522 info
->array
.ctime
= 0;
523 info
->array
.utime
= 0;
524 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
526 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
527 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
529 info
->disk
.major
= 0;
530 info
->disk
.minor
= 0;
532 sprintf(info
->text_version
, "/%s/%d",
533 devnum2devname(st
->container_dev
),
534 info
->container_member
);
538 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
540 struct intel_super
*super
= st
->sb
;
541 struct imsm_super
*mpb
= super
->mpb
;
542 struct imsm_disk
*disk
;
545 if (super
->current_vol
>= 0) {
546 getinfo_super_imsm_volume(st
, info
);
549 info
->array
.raid_disks
= mpb
->num_disks
;
550 info
->array
.level
= LEVEL_CONTAINER
;
551 info
->array
.layout
= 0;
552 info
->array
.md_minor
= -1;
553 info
->array
.ctime
= 0; /* N/A for imsm */
554 info
->array
.utime
= 0;
555 info
->array
.chunk_size
= 0;
557 info
->disk
.major
= 0;
558 info
->disk
.minor
= 0;
559 info
->disk
.raid_disk
= -1;
560 info
->reshape_active
= 0;
561 strcpy(info
->text_version
, "imsm");
562 info
->disk
.number
= -1;
563 info
->disk
.state
= 0;
566 disk
= get_imsm_disk(mpb
, super
->disks
->index
);
568 info
->disk
.number
= -1;
569 info
->disk
.raid_disk
= -1;
572 info
->disk
.number
= super
->disks
->index
;
573 info
->disk
.raid_disk
= super
->disks
->index
;
574 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
575 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
576 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
577 s
= __le32_to_cpu(disk
->status
);
578 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
579 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
580 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
584 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
585 char *update
, char *devname
, int verbose
,
586 int uuid_set
, char *homehost
)
590 /* For 'assemble' and 'force' we need to return non-zero if any
591 * change was made. For others, the return value is ignored.
592 * Update options are:
593 * force-one : This device looks a bit old but needs to be included,
594 * update age info appropriately.
595 * assemble: clear any 'faulty' flag to allow this device to
597 * force-array: Array is degraded but being forced, mark it clean
598 * if that will be needed to assemble it.
600 * newdev: not used ????
601 * grow: Array has gained a new device - this is currently for
603 * resync: mark as dirty so a resync will happen.
604 * name: update the name - preserving the homehost
606 * Following are not relevant for this imsm:
607 * sparc2.2 : update from old dodgey metadata
608 * super-minor: change the preferred_minor number
609 * summaries: update redundant counters.
610 * uuid: Change the uuid of the array to match watch is given
611 * homehost: update the recorded homehost
612 * _reshape_progress: record new reshape_progress position.
615 //struct intel_super *super = st->sb;
616 //struct imsm_super *mpb = super->mpb;
618 if (strcmp(update
, "grow") == 0) {
620 if (strcmp(update
, "resync") == 0) {
621 /* dev->vol.dirty = 1; */
624 /* IMSM has no concept of UUID or homehost */
629 static size_t disks_to_mpb_size(int disks
)
633 size
= sizeof(struct imsm_super
);
634 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
635 size
+= 2 * sizeof(struct imsm_dev
);
636 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
637 size
+= (4 - 2) * sizeof(struct imsm_map
);
638 /* 4 possible disk_ord_tbl's */
639 size
+= 4 * (disks
- 1) * sizeof(__u32
);
644 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
646 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
649 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
652 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
656 * 0 same, or first was empty, and second was copied
657 * 1 second had wrong number
661 struct intel_super
*first
= st
->sb
;
662 struct intel_super
*sec
= tst
->sb
;
670 if (memcmp(first
->mpb
->sig
, sec
->mpb
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
672 if (first
->mpb
->family_num
!= sec
->mpb
->family_num
)
674 if (first
->mpb
->mpb_size
!= sec
->mpb
->mpb_size
)
676 if (first
->mpb
->check_sum
!= sec
->mpb
->check_sum
)
682 static void fd2devname(int fd
, char *name
)
691 if (fstat(fd
, &st
) != 0)
693 sprintf(path
, "/sys/dev/block/%d:%d",
694 major(st
.st_rdev
), minor(st
.st_rdev
));
696 rv
= readlink(path
, dname
, sizeof(dname
));
701 nm
= strrchr(dname
, '/');
703 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
707 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
709 static int imsm_read_serial(int fd
, char *devname
,
710 __u8 serial
[MAX_RAID_SERIAL_LEN
])
712 unsigned char scsi_serial
[255];
717 memset(scsi_serial
, 0, sizeof(scsi_serial
));
719 if (imsm_env_devname_as_serial()) {
720 char name
[MAX_RAID_SERIAL_LEN
];
722 fd2devname(fd
, name
);
723 strcpy((char *) serial
, name
);
727 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
732 Name
": Failed to retrieve serial for %s\n",
737 rsp_len
= scsi_serial
[3];
738 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
739 if (!isspace(scsi_serial
[4 + i
]))
740 serial
[cnt
++] = scsi_serial
[4 + i
];
741 if (cnt
== MAX_RAID_SERIAL_LEN
)
745 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
751 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
753 struct imsm_super
*mpb
= super
->mpb
;
756 struct imsm_disk
*disk
;
760 dl
= malloc(sizeof(*dl
));
764 Name
": failed to allocate disk buffer for %s\n",
768 memset(dl
, 0, sizeof(*dl
));
771 dl
->major
= major(stb
.st_rdev
);
772 dl
->minor
= minor(stb
.st_rdev
);
773 dl
->next
= super
->disks
;
774 dl
->fd
= keep_fd
? fd
: -1;
775 dl
->devname
= devname
? strdup(devname
) : NULL
;
778 rv
= imsm_read_serial(fd
, devname
, dl
->serial
);
783 /* look up this disk's index */
784 for (i
= 0; i
< mpb
->num_disks
; i
++) {
785 disk
= get_imsm_disk(mpb
, i
);
787 if (memcmp(disk
->serial
, dl
->serial
, MAX_RAID_SERIAL_LEN
) == 0)
791 if (i
> mpb
->num_disks
- 1) {
794 Name
": failed to match serial \'%s\' for %s\n",
795 dl
->serial
, devname
);
804 /* load_imsm_mpb - read matrix metadata
805 * allocates super->mpb to be freed by free_super
807 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
809 unsigned long long dsize
;
810 size_t len
, mpb_size
;
811 unsigned long long sectors
;
813 struct imsm_super
*anchor
;
816 get_dev_size(fd
, NULL
, &dsize
);
818 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
821 Name
": Cannot seek to anchor block on %s: %s\n",
822 devname
, strerror(errno
));
827 if (posix_memalign((void**)&anchor
, 512, len
) != 0) {
830 Name
": Failed to allocate imsm anchor buffer"
831 " on %s\n", devname
);
834 if (read(fd
, anchor
, len
) != len
) {
837 Name
": Cannot read anchor block on %s: %s\n",
838 devname
, strerror(errno
));
843 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
846 Name
": no IMSM anchor on %s\n", devname
);
851 mpb_size
= __le32_to_cpu(anchor
->mpb_size
);
852 mpb_size
= ROUND_UP(mpb_size
, 512);
853 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
856 Name
": unable to allocate %zu byte mpb buffer\n",
861 memcpy(super
->buf
, anchor
, len
);
863 sectors
= mpb_sectors(anchor
) - 1;
866 return load_imsm_disk(fd
, super
, devname
, 0);
868 /* read the extended mpb */
869 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
872 Name
": Cannot seek to extended mpb on %s: %s\n",
873 devname
, strerror(errno
));
877 len
= mpb_size
- 512;
878 if (read(fd
, super
->buf
+ 512, len
) != len
) {
881 Name
": Cannot read extended mpb on %s: %s\n",
882 devname
, strerror(errno
));
886 check_sum
= gen_imsm_checksum(super
->mpb
);
887 if (check_sum
!= __le32_to_cpu(super
->mpb
->check_sum
)) {
890 Name
": IMSM checksum %x != %x on %s\n",
891 check_sum
, __le32_to_cpu(super
->mpb
->check_sum
),
896 return load_imsm_disk(fd
, super
, devname
, 0);
899 static void free_imsm_disks(struct intel_super
*super
)
901 while (super
->disks
) {
902 struct dl
*d
= super
->disks
;
904 super
->disks
= d
->next
;
913 static void free_imsm(struct intel_super
*super
)
917 free_imsm_disks(super
);
922 static void free_super_imsm(struct supertype
*st
)
924 struct intel_super
*super
= st
->sb
;
933 static struct intel_super
*alloc_super(int creating_imsm
)
935 struct intel_super
*super
= malloc(sizeof(*super
));
938 memset(super
, 0, sizeof(*super
));
939 super
->creating_imsm
= creating_imsm
;
940 super
->current_vol
= -1;
947 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
948 char *devname
, int keep_fd
)
951 struct intel_super
*super
;
952 struct mdinfo
*sd
, *best
= NULL
;
959 /* check if this disk is a member of an active array */
960 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
964 if (sra
->array
.major_version
!= -1 ||
965 sra
->array
.minor_version
!= -2 ||
966 strcmp(sra
->text_version
, "imsm") != 0)
969 super
= alloc_super(0);
973 /* find the most up to date disk in this array */
974 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
975 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
976 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
981 rv
= load_imsm_mpb(dfd
, super
, NULL
);
985 gen
= __le32_to_cpu(super
->mpb
->generation_num
);
986 if (!best
|| gen
> bestgen
) {
1001 /* load the most up to date anchor */
1002 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1003 dfd
= dev_open(nm
, O_RDONLY
);
1008 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1015 /* reset the disk list */
1016 free_imsm_disks(super
);
1018 /* populate disk list */
1019 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1020 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1021 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1026 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1031 if (st
->subarray
[0]) {
1032 if (atoi(st
->subarray
) <= super
->mpb
->num_raid_devs
)
1033 super
->current_vol
= atoi(st
->subarray
);
1039 if (st
->ss
== NULL
) {
1040 st
->ss
= &super_imsm
;
1041 st
->minor_version
= 0;
1042 st
->max_devs
= IMSM_MAX_DEVICES
;
1043 st
->container_dev
= fd2devnum(fd
);
1050 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1052 struct intel_super
*super
;
1056 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1059 if (st
->subarray
[0])
1060 return 1; /* FIXME */
1062 super
= alloc_super(0);
1065 Name
": malloc of %zu failed.\n",
1070 rv
= load_imsm_mpb(fd
, super
, devname
);
1075 Name
": Failed to load all information "
1076 "sections on %s\n", devname
);
1082 if (st
->ss
== NULL
) {
1083 st
->ss
= &super_imsm
;
1084 st
->minor_version
= 0;
1085 st
->max_devs
= IMSM_MAX_DEVICES
;
1091 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1093 if (info
->level
== 1)
1095 return info
->chunk_size
>> 9;
1098 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1102 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1103 if (info
->level
== 1)
1109 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1110 unsigned long long size
, char *name
,
1111 char *homehost
, int *uuid
)
1113 /* We are creating a volume inside a pre-existing container.
1114 * so st->sb is already set.
1116 struct intel_super
*super
= st
->sb
;
1117 struct imsm_super
*mpb
= super
->mpb
;
1118 struct imsm_dev
*dev
;
1119 struct imsm_vol
*vol
;
1120 struct imsm_map
*map
;
1121 int idx
= mpb
->num_raid_devs
;
1123 unsigned long long array_blocks
;
1125 size_t size_old
, size_new
;
1127 if (mpb
->num_raid_devs
>= 2) {
1128 fprintf(stderr
, Name
": This imsm-container already has the "
1129 "maximum of 2 volumes\n");
1133 /* ensure the mpb is large enough for the new data */
1134 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1135 size_new
= disks_to_mpb_size(info
->nr_disks
);
1136 if (size_new
> size_old
) {
1138 size_t size_round
= ROUND_UP(size_new
, 512);
1140 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1141 fprintf(stderr
, Name
": could not allocate new mpb\n");
1144 memcpy(mpb_new
, mpb
, size_old
);
1147 super
->mpb
= mpb_new
;
1148 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1149 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1151 super
->current_vol
= idx
;
1152 sprintf(st
->subarray
, "%d", idx
);
1153 mpb
->num_raid_devs
++;
1154 dev
= get_imsm_dev(mpb
, idx
);
1155 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1156 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1157 info
->layout
, info
->chunk_size
,
1159 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1160 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1161 dev
->status
= __cpu_to_le32(0);
1162 dev
->reserved_blocks
= __cpu_to_le32(0);
1164 vol
->migr_state
= 0;
1167 for (i
= 0; i
< idx
; i
++) {
1168 struct imsm_dev
*prev
= get_imsm_dev(mpb
, i
);
1169 struct imsm_map
*pmap
= &prev
->vol
.map
[0];
1171 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1172 offset
+= IMSM_RESERVED_SECTORS
;
1175 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1176 map
->blocks_per_member
= __cpu_to_le32(info
->size
* 2);
1177 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1178 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1179 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1180 IMSM_T_STATE_NORMAL
;
1182 if (info
->level
== 1 && info
->raid_disks
> 2) {
1183 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1184 "in a raid1 volume\n");
1187 if (info
->level
== 10)
1188 map
->raid_level
= 1;
1190 map
->raid_level
= info
->level
;
1192 map
->num_members
= info
->raid_disks
;
1193 for (i
= 0; i
< map
->num_members
; i
++) {
1194 /* initialized in add_to_super */
1195 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1201 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1202 unsigned long long size
, char *name
,
1203 char *homehost
, int *uuid
)
1205 /* This is primarily called by Create when creating a new array.
1206 * We will then get add_to_super called for each component, and then
1207 * write_init_super called to write it out to each device.
1208 * For IMSM, Create can create on fresh devices or on a pre-existing
1210 * To create on a pre-existing array a different method will be called.
1211 * This one is just for fresh drives.
1213 struct intel_super
*super
;
1214 struct imsm_super
*mpb
;
1222 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1225 super
= alloc_super(1);
1228 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1229 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1234 memset(mpb
, 0, mpb_size
);
1236 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1237 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1238 strlen(MPB_VERSION_RAID5
));
1239 mpb
->mpb_size
= mpb_size
;
1245 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1246 int fd
, char *devname
)
1248 struct intel_super
*super
= st
->sb
;
1249 struct imsm_super
*mpb
= super
->mpb
;
1251 struct imsm_dev
*dev
;
1252 struct imsm_map
*map
;
1253 struct imsm_disk
*disk
;
1256 dev
= get_imsm_dev(mpb
, super
->current_vol
);
1257 map
= &dev
->vol
.map
[0];
1259 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1260 if (dl
->major
== dk
->major
&&
1261 dl
->minor
== dk
->minor
)
1263 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1266 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1268 disk
= get_imsm_disk(mpb
, dl
->index
);
1269 status
= CONFIGURED_DISK
| USABLE_DISK
;
1270 disk
->status
= __cpu_to_le32(status
);
1273 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1274 int fd
, char *devname
)
1276 struct intel_super
*super
= st
->sb
;
1277 struct imsm_super
*mpb
= super
->mpb
;
1278 struct imsm_disk
*disk
;
1280 unsigned long long size
;
1285 if (super
->current_vol
>= 0) {
1286 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1291 dd
= malloc(sizeof(*dd
));
1294 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1297 memset(dd
, 0, sizeof(*dd
));
1298 dd
->major
= major(stb
.st_rdev
);
1299 dd
->minor
= minor(stb
.st_rdev
);
1300 dd
->index
= dk
->number
;
1301 dd
->devname
= devname
? strdup(devname
) : NULL
;
1302 dd
->next
= super
->disks
;
1304 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1307 Name
": failed to retrieve scsi serial, aborting\n");
1311 if (mpb
->num_disks
<= dk
->number
)
1312 mpb
->num_disks
= dk
->number
+ 1;
1314 disk
= get_imsm_disk(mpb
, dk
->number
);
1315 get_dev_size(fd
, NULL
, &size
);
1317 status
= USABLE_DISK
| SPARE_DISK
;
1318 strcpy((char *) disk
->serial
, (char *) dd
->serial
);
1319 disk
->total_blocks
= __cpu_to_le32(size
);
1320 disk
->status
= __cpu_to_le32(status
);
1321 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1322 disk
->scsi_id
= __cpu_to_le32(id
);
1324 disk
->scsi_id
= __cpu_to_le32(0);
1326 /* update the family number if we are creating a container */
1327 if (super
->creating_imsm
)
1328 mpb
->family_num
= __cpu_to_le32(gen_imsm_checksum(mpb
));
1333 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1335 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1337 struct imsm_super
*mpb
= super
->mpb
;
1342 /* 'generation' is incremented everytime the metadata is written */
1343 generation
= __le32_to_cpu(mpb
->generation_num
);
1345 mpb
->generation_num
= __cpu_to_le32(generation
);
1347 /* recalculate checksum */
1348 sum
= gen_imsm_checksum(mpb
);
1349 mpb
->check_sum
= __cpu_to_le32(sum
);
1351 for (d
= super
->disks
; d
; d
= d
->next
) {
1352 if (store_imsm_mpb(d
->fd
, super
)) {
1353 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1354 __func__
, d
->major
, d
->minor
, strerror(errno
));
1366 static int write_init_super_imsm(struct supertype
*st
)
1368 if (st
->update_tail
) {
1369 /* queue the recently created array as a metadata update */
1371 struct imsm_update_create_array
*u
;
1372 struct intel_super
*super
= st
->sb
;
1373 struct imsm_super
*mpb
= super
->mpb
;
1374 struct imsm_dev
*dev
;
1375 struct imsm_map
*map
;
1378 if (super
->current_vol
< 0 ||
1379 !(dev
= get_imsm_dev(mpb
, super
->current_vol
))) {
1380 fprintf(stderr
, "%s: could not determine sub-array\n",
1386 map
= &dev
->vol
.map
[0];
1387 len
= sizeof(*u
) + sizeof(__u32
) * (map
->num_members
- 1);
1390 fprintf(stderr
, "%s: failed to allocate update buffer\n",
1395 u
->type
= update_create_array
;
1396 u
->dev_idx
= super
->current_vol
;
1397 memcpy(&u
->dev
, dev
, sizeof(*dev
));
1398 memcpy(u
->dev
.vol
.map
[0].disk_ord_tbl
, map
->disk_ord_tbl
,
1399 sizeof(__u32
) * map
->num_members
);
1400 append_metadata_update(st
, u
, len
);
1402 for (d
= super
->disks
; d
; d
= d
->next
) {
1409 return write_super_imsm(st
->sb
, 1);
1412 static int store_zero_imsm(struct supertype
*st
, int fd
)
1414 unsigned long long dsize
;
1417 get_dev_size(fd
, NULL
, &dsize
);
1419 /* first block is stored on second to last sector of the disk */
1420 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1423 if (posix_memalign(&buf
, 512, 512) != 0)
1426 memset(buf
, 0, 512);
1427 if (write(fd
, buf
, 512) != 512)
1432 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1433 int layout
, int raiddisks
, int chunk
,
1434 unsigned long long size
, char *dev
,
1435 unsigned long long *freesize
,
1439 unsigned long long ldsize
;
1441 if (level
!= LEVEL_CONTAINER
)
1446 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1449 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1450 dev
, strerror(errno
));
1453 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1459 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1464 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1465 * FIX ME add ahci details
1467 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1468 int layout
, int raiddisks
, int chunk
,
1469 unsigned long long size
, char *dev
,
1470 unsigned long long *freesize
,
1474 struct intel_super
*super
= st
->sb
;
1476 unsigned long long pos
= 0;
1477 unsigned long long maxsize
;
1481 if (level
== LEVEL_CONTAINER
)
1484 if (level
== 1 && raiddisks
> 2) {
1486 fprintf(stderr
, Name
": imsm does not support more "
1487 "than 2 in a raid1 configuration\n");
1491 /* We must have the container info already read in. */
1496 /* General test: make sure there is space for
1497 * 'raiddisks' device extents of size 'size' at a given
1500 unsigned long long minsize
= size
*2 /* convert to blocks */;
1501 unsigned long long start_offset
= ~0ULL;
1504 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1505 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1510 e
= get_extents(super
, dl
);
1513 unsigned long long esize
;
1514 esize
= e
[i
].start
- pos
;
1515 if (esize
>= minsize
)
1517 if (found
&& start_offset
== ~0ULL) {
1520 } else if (found
&& pos
!= start_offset
) {
1524 pos
= e
[i
].start
+ e
[i
].size
;
1526 } while (e
[i
-1].size
);
1531 if (dcnt
< raiddisks
) {
1533 fprintf(stderr
, Name
": imsm: Not enough "
1534 "devices with space for this array "
1541 /* This device must be a member of the set */
1542 if (stat(dev
, &stb
) < 0)
1544 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1546 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1547 if (dl
->major
== major(stb
.st_rdev
) &&
1548 dl
->minor
== minor(stb
.st_rdev
))
1553 fprintf(stderr
, Name
": %s is not in the "
1554 "same imsm set\n", dev
);
1557 e
= get_extents(super
, dl
);
1561 unsigned long long esize
;
1562 esize
= e
[i
].start
- pos
;
1563 if (esize
>= maxsize
)
1565 pos
= e
[i
].start
+ e
[i
].size
;
1567 } while (e
[i
-1].size
);
1568 *freesize
= maxsize
;
1573 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1574 int raiddisks
, int chunk
, unsigned long long size
,
1575 char *dev
, unsigned long long *freesize
,
1581 /* if given unused devices create a container
1582 * if given given devices in a container create a member volume
1584 if (level
== LEVEL_CONTAINER
) {
1585 /* Must be a fresh device to add to a container */
1586 return validate_geometry_imsm_container(st
, level
, layout
,
1587 raiddisks
, chunk
, size
,
1593 /* creating in a given container */
1594 return validate_geometry_imsm_volume(st
, level
, layout
,
1595 raiddisks
, chunk
, size
,
1596 dev
, freesize
, verbose
);
1599 /* limit creation to the following levels */
1611 /* This device needs to be a device in an 'imsm' container */
1612 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1616 Name
": Cannot create this array on device %s\n",
1621 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
1623 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1624 dev
, strerror(errno
));
1627 /* Well, it is in use by someone, maybe an 'imsm' container. */
1628 cfd
= open_container(fd
);
1632 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
1636 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
1638 if (sra
&& sra
->array
.major_version
== -1 &&
1639 strcmp(sra
->text_version
, "imsm") == 0) {
1640 /* This is a member of a imsm container. Load the container
1641 * and try to create a volume
1643 struct intel_super
*super
;
1645 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
1647 st
->container_dev
= fd2devnum(cfd
);
1649 return validate_geometry_imsm_volume(st
, level
, layout
,
1655 } else /* may belong to another container */
1661 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
1663 /* Given a container loaded by load_super_imsm_all,
1664 * extract information about all the arrays into
1667 * For each imsm_dev create an mdinfo, fill it in,
1668 * then look for matching devices in super->disks
1669 * and create appropriate device mdinfo.
1671 struct intel_super
*super
= st
->sb
;
1672 struct imsm_super
*mpb
= super
->mpb
;
1673 struct mdinfo
*rest
= NULL
;
1676 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1677 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
1678 struct imsm_vol
*vol
= &dev
->vol
;
1679 struct imsm_map
*map
= vol
->map
;
1680 struct mdinfo
*this;
1684 this = malloc(sizeof(*this));
1685 memset(this, 0, sizeof(*this));
1689 this->array
.level
= get_imsm_raid_level(map
);
1690 this->array
.raid_disks
= map
->num_members
;
1691 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
1692 this->array
.md_minor
= -1;
1693 this->array
.ctime
= 0;
1694 this->array
.utime
= 0;
1695 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1696 this->array
.state
= !vol
->dirty
;
1697 this->container_member
= i
;
1698 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1699 this->resync_start
= 0;
1701 this->resync_start
= ~0ULL;
1703 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1704 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
1706 sprintf(this->text_version
, "/%s/%d",
1707 devnum2devname(st
->container_dev
),
1708 this->container_member
);
1710 memset(this->uuid
, 0, sizeof(this->uuid
));
1712 sz
= __le32_to_cpu(dev
->size_high
);
1714 sz
+= __le32_to_cpu(dev
->size_low
);
1715 this->component_size
= sz
;
1716 this->array
.size
= this->component_size
/ 2;
1718 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
1719 struct imsm_disk
*disk
;
1720 struct mdinfo
*info_d
;
1725 idx
= __le32_to_cpu(map
->disk_ord_tbl
[slot
] & ~(0xff << 24));
1726 for (d
= super
->disks
; d
; d
= d
->next
)
1727 if (d
->index
== idx
)
1731 break; /* shouldn't this be continue ?? */
1733 info_d
= malloc(sizeof(*info_d
));
1735 break; /* ditto ?? */
1736 memset(info_d
, 0, sizeof(*info_d
));
1737 info_d
->next
= this->devs
;
1738 this->devs
= info_d
;
1740 disk
= get_imsm_disk(mpb
, idx
);
1741 s
= __le32_to_cpu(disk
->status
);
1743 info_d
->disk
.number
= d
->index
;
1744 info_d
->disk
.major
= d
->major
;
1745 info_d
->disk
.minor
= d
->minor
;
1746 info_d
->disk
.raid_disk
= slot
;
1747 info_d
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
1748 info_d
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
1749 info_d
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
1751 this->array
.working_disks
++;
1753 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
1754 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1755 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1757 strcpy(info_d
->name
, d
->devname
);
1765 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
1768 struct intel_super
*super
= c
->sb
;
1769 struct imsm_super
*mpb
= super
->mpb
;
1771 if (atoi(inst
) + 1 > mpb
->num_raid_devs
) {
1772 fprintf(stderr
, "%s: subarry index %d, out of range\n",
1773 __func__
, atoi(inst
));
1777 dprintf("imsm: open_new %s\n", inst
);
1778 a
->info
.container_member
= atoi(inst
);
1782 static __u8
imsm_check_degraded(struct imsm_super
*mpb
, int n
, int failed
)
1784 struct imsm_dev
*dev
= get_imsm_dev(mpb
, n
);
1785 struct imsm_map
*map
= dev
->vol
.map
;
1788 return map
->map_state
;
1790 switch (get_imsm_raid_level(map
)) {
1792 return IMSM_T_STATE_FAILED
;
1795 if (failed
< map
->num_members
)
1796 return IMSM_T_STATE_DEGRADED
;
1798 return IMSM_T_STATE_FAILED
;
1803 * check to see if any mirrors have failed,
1804 * otherwise we are degraded
1806 int device_per_mirror
= 2; /* FIXME is this always the case?
1807 * and are they always adjacent?
1812 for (i
= 0; i
< map
->num_members
; i
++) {
1813 int idx
= get_imsm_disk_idx(map
, i
);
1814 struct imsm_disk
*disk
= get_imsm_disk(mpb
, idx
);
1816 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1819 if (failed
>= device_per_mirror
)
1820 return IMSM_T_STATE_FAILED
;
1822 /* reset 'failed' for next mirror set */
1823 if (!((i
+ 1) % device_per_mirror
))
1827 return IMSM_T_STATE_DEGRADED
;
1831 return IMSM_T_STATE_DEGRADED
;
1833 return IMSM_T_STATE_FAILED
;
1839 return map
->map_state
;
1842 static int imsm_count_failed(struct imsm_super
*mpb
, struct imsm_map
*map
)
1846 struct imsm_disk
*disk
;
1848 for (i
= 0; i
< map
->num_members
; i
++) {
1849 int idx
= get_imsm_disk_idx(map
, i
);
1851 disk
= get_imsm_disk(mpb
, idx
);
1852 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1859 static void imsm_set_array_state(struct active_array
*a
, int consistent
)
1861 int inst
= a
->info
.container_member
;
1862 struct intel_super
*super
= a
->container
->sb
;
1863 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1864 struct imsm_map
*map
= &dev
->vol
.map
[0];
1865 int dirty
= !consistent
;
1869 if (a
->resync_start
== ~0ULL) {
1870 failed
= imsm_count_failed(super
->mpb
, map
);
1871 map_state
= imsm_check_degraded(super
->mpb
, inst
, failed
);
1873 map_state
= IMSM_T_STATE_NORMAL
;
1874 if (map
->map_state
!= map_state
) {
1875 dprintf("imsm: map_state %d: %d\n",
1877 map
->map_state
= map_state
;
1878 super
->updates_pending
++;
1882 if (dev
->vol
.dirty
!= dirty
) {
1883 dprintf("imsm: mark '%s' (%llu)\n",
1884 dirty
?"dirty":"clean", a
->resync_start
);
1886 dev
->vol
.dirty
= dirty
;
1887 super
->updates_pending
++;
1891 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
1893 int inst
= a
->info
.container_member
;
1894 struct intel_super
*super
= a
->container
->sb
;
1895 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1896 struct imsm_map
*map
= dev
->vol
.map
;
1897 struct imsm_disk
*disk
;
1900 int new_failure
= 0;
1902 if (n
> map
->num_members
)
1903 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
1904 n
, map
->num_members
- 1);
1909 dprintf("imsm: set_disk %d:%x\n", n
, state
);
1911 disk
= get_imsm_disk(super
->mpb
, get_imsm_disk_idx(map
, n
));
1913 /* check for new failures */
1914 status
= __le32_to_cpu(disk
->status
);
1915 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
1916 status
|= FAILED_DISK
;
1917 disk
->status
= __cpu_to_le32(status
);
1919 super
->updates_pending
++;
1922 /* the number of failures have changed, count up 'failed' to determine
1923 * degraded / failed status
1925 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
1926 failed
= imsm_count_failed(super
->mpb
, map
);
1928 /* determine map_state based on failed or in_sync count */
1930 map
->map_state
= imsm_check_degraded(super
->mpb
, inst
, failed
);
1931 else if (map
->map_state
== IMSM_T_STATE_DEGRADED
) {
1935 for (d
= a
->info
.devs
; d
; d
= d
->next
)
1936 if (d
->curr_state
& DS_INSYNC
)
1939 if (working
== a
->info
.array
.raid_disks
) {
1940 map
->map_state
= IMSM_T_STATE_NORMAL
;
1941 super
->updates_pending
++;
1946 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
1948 struct imsm_super
*mpb
= super
->mpb
;
1949 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
1950 unsigned long long dsize
;
1951 unsigned long long sectors
;
1953 get_dev_size(fd
, NULL
, &dsize
);
1955 if (mpb_size
> 512) {
1956 /* -1 to account for anchor */
1957 sectors
= mpb_sectors(mpb
) - 1;
1959 /* write the extended mpb to the sectors preceeding the anchor */
1960 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
1963 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
1967 /* first block is stored on second to last sector of the disk */
1968 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1971 if (write(fd
, super
->buf
, 512) != 512)
1977 static void imsm_sync_metadata(struct supertype
*container
)
1979 struct intel_super
*super
= container
->sb
;
1981 if (!super
->updates_pending
)
1984 write_super_imsm(super
, 0);
1986 super
->updates_pending
= 0;
1989 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
1990 struct metadata_update
**updates
)
1993 * Take a device that is marked spare in the metadata and use it to
1994 * replace a failed/vacant slot in an array. There may be a case where
1995 * a device is failed in one array but active in a second.
1996 * imsm_process_update catches this case and does not clear the SPARE_DISK
1997 * flag, allowing the second array to start using the device on failure.
1998 * SPARE_DISK is cleared when all arrays are using a device.
2000 * FIXME: is this a valid use of SPARE_DISK?
2003 struct intel_super
*super
= a
->container
->sb
;
2004 struct imsm_super
*mpb
= super
->mpb
;
2005 int inst
= a
->info
.container_member
;
2006 struct imsm_dev
*dev
= get_imsm_dev(mpb
, inst
);
2007 struct imsm_map
*map
= dev
->vol
.map
;
2008 int failed
= a
->info
.array
.raid_disks
;
2009 struct mdinfo
*rv
= NULL
;
2012 struct metadata_update
*mu
;
2014 struct imsm_update_activate_spare
*u
;
2018 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
2019 if ((d
->curr_state
& DS_FAULTY
) &&
2021 /* wait for Removal to happen */
2023 if (d
->state_fd
>= 0)
2027 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
2028 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
2029 if (imsm_check_degraded(mpb
, inst
, failed
) != IMSM_T_STATE_DEGRADED
)
2032 /* For each slot, if it is not working, find a spare */
2034 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
2035 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2036 if (d
->disk
.raid_disk
== i
)
2038 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
2039 if (d
&& (d
->state_fd
>= 0))
2042 /* OK, this device needs recovery. Find a spare */
2043 for ( ; dl
; dl
= dl
->next
) {
2044 unsigned long long esize
;
2045 unsigned long long pos
;
2048 struct imsm_disk
*disk
;
2053 /* If in this array, skip */
2054 for (d2
= a
->info
.devs
; d2
; d2
= d2
->next
)
2055 if (d2
->disk
.major
== dl
->major
&&
2056 d2
->disk
.minor
== dl
->minor
) {
2057 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
2063 /* is this unused device marked as a spare? */
2064 disk
= get_imsm_disk(mpb
, dl
->index
);
2065 if (!(__le32_to_cpu(disk
->status
) & SPARE_DISK
))
2068 /* We are allowed to use this device - is there space?
2069 * We need a->info.component_size sectors */
2070 ex
= get_extents(super
, dl
);
2072 dprintf("cannot get extents\n");
2078 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
2081 /* check that we can start at pba_of_lba0 with
2082 * a->info.component_size of space
2084 esize
= ex
[j
].start
- pos
;
2085 if (array_start
>= pos
&&
2086 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
2090 pos
= ex
[j
].start
+ ex
[j
].size
;
2093 } while (ex
[j
-1].size
);
2097 dprintf("%x:%x does not have %llu at %d\n",
2098 dl
->major
, dl
->minor
,
2099 a
->info
.component_size
,
2100 __le32_to_cpu(map
->pba_of_lba0
));
2105 /* found a usable disk with enough space */
2106 di
= malloc(sizeof(*di
));
2107 memset(di
, 0, sizeof(*di
));
2108 di
->disk
.number
= dl
->index
;
2109 di
->disk
.raid_disk
= i
;
2110 di
->disk
.major
= dl
->major
;
2111 di
->disk
.minor
= dl
->minor
;
2113 di
->data_offset
= array_start
;
2114 di
->component_size
= a
->info
.component_size
;
2115 di
->container_member
= inst
;
2119 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
2127 /* No spares found */
2129 /* Now 'rv' has a list of devices to return.
2130 * Create a metadata_update record to update the
2131 * disk_ord_tbl for the array
2133 mu
= malloc(sizeof(*mu
));
2134 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
2136 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
2137 mu
->next
= *updates
;
2138 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
2140 for (di
= rv
; di
; di
= di
->next
) {
2141 u
->type
= update_activate_spare
;
2142 u
->disk_idx
= di
->disk
.number
;
2143 u
->slot
= di
->disk
.raid_disk
;
2154 static int weight(unsigned int field
)
2158 for (weight
= 0; field
; weight
++)
2164 static int disks_overlap(struct imsm_map
*m1
, struct imsm_map
*m2
)
2170 for (i
= 0; i
< m1
->num_members
; i
++) {
2171 idx
= get_imsm_disk_idx(m1
, i
);
2172 for (j
= 0; j
< m2
->num_members
; j
++)
2173 if (idx
== get_imsm_disk_idx(m2
, j
))
2180 static void imsm_process_update(struct supertype
*st
,
2181 struct metadata_update
*update
)
2184 * crack open the metadata_update envelope to find the update record
2185 * update can be one of:
2186 * update_activate_spare - a spare device has replaced a failed
2187 * device in an array, update the disk_ord_tbl. If this disk is
2188 * present in all member arrays then also clear the SPARE_DISK
2191 struct intel_super
*super
= st
->sb
;
2192 struct imsm_super
*mpb
= super
->mpb
;
2193 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
2196 case update_activate_spare
: {
2197 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
2198 struct imsm_dev
*dev
= get_imsm_dev(mpb
, u
->array
);
2199 struct imsm_map
*map
= &dev
->vol
.map
[0];
2200 struct active_array
*a
;
2201 struct imsm_disk
*disk
;
2205 unsigned int members
;
2210 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2211 if (dl
->index
== u
->disk_idx
)
2215 fprintf(stderr
, "error: imsm_activate_spare passed "
2216 "an unknown disk_idx: %d\n", u
->disk_idx
);
2220 super
->updates_pending
++;
2222 victim
= get_imsm_disk_idx(map
, u
->slot
);
2223 map
->disk_ord_tbl
[u
->slot
] = __cpu_to_le32(u
->disk_idx
);
2224 disk
= get_imsm_disk(mpb
, u
->disk_idx
);
2225 status
= __le32_to_cpu(disk
->status
);
2226 status
|= CONFIGURED_DISK
;
2227 disk
->status
= __cpu_to_le32(status
);
2229 /* map unique/live arrays using the spare */
2232 for (a
= st
->arrays
; a
; a
= a
->next
) {
2233 int inst
= a
->info
.container_member
;
2235 dev
= get_imsm_dev(mpb
, inst
);
2236 map
= &dev
->vol
.map
[0];
2237 if (map
->raid_level
> 0)
2238 members
|= 1 << inst
;
2239 for (d
= a
->info
.devs
; d
; d
= d
->next
)
2240 if (d
->disk
.major
== dl
->major
&&
2241 d
->disk
.minor
== dl
->minor
)
2245 /* until all arrays that can absorb this disk have absorbed
2246 * this disk it can still be considered a spare
2248 if (weight(found
) >= weight(members
)) {
2249 status
= __le32_to_cpu(disk
->status
);
2250 status
&= ~SPARE_DISK
;
2251 disk
->status
= __cpu_to_le32(status
);
2254 /* count arrays using the victim in the metadata */
2256 for (a
= st
->arrays
; a
; a
= a
->next
) {
2257 dev
= get_imsm_dev(mpb
, a
->info
.container_member
);
2258 map
= &dev
->vol
.map
[0];
2259 for (i
= 0; i
< map
->num_members
; i
++)
2260 if (victim
== get_imsm_disk_idx(map
, i
))
2264 /* clear some flags if the victim is no longer being
2267 disk
= get_imsm_disk(mpb
, victim
);
2269 status
= __le32_to_cpu(disk
->status
);
2270 status
&= ~(CONFIGURED_DISK
| USABLE_DISK
);
2271 disk
->status
= __cpu_to_le32(status
);
2275 case update_create_array
: {
2276 /* someone wants to create a new array, we need to be aware of
2277 * a few races/collisions:
2278 * 1/ 'Create' called by two separate instances of mdadm
2279 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
2280 * devices that have since been assimilated via
2282 * In the event this update can not be carried out mdadm will
2283 * (FIX ME) notice that its update did not take hold.
2285 struct imsm_update_create_array
*u
= (void *) update
->buf
;
2286 struct imsm_dev
*dev
;
2287 struct imsm_map
*map
, *new_map
;
2288 unsigned long long start
, end
;
2289 unsigned long long new_start
, new_end
;
2293 /* handle racing creates: first come first serve */
2294 if (u
->dev_idx
< mpb
->num_raid_devs
) {
2295 dprintf("%s: subarray %d already defined\n",
2296 __func__
, u
->dev_idx
);
2300 /* check update is next in sequence */
2301 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
2302 dprintf("%s: can not create arrays out of sequence\n",
2307 new_map
= &u
->dev
.vol
.map
[0];
2308 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
2309 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
2311 /* handle activate_spare versus create race:
2312 * check to make sure that overlapping arrays do not include
2315 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2316 dev
= get_imsm_dev(mpb
, i
);
2317 map
= &dev
->vol
.map
[0];
2318 start
= __le32_to_cpu(map
->pba_of_lba0
);
2319 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
2320 if ((new_start
>= start
&& new_start
<= end
) ||
2321 (start
>= new_start
&& start
<= new_end
))
2323 if (overlap
&& disks_overlap(map
, new_map
)) {
2324 dprintf("%s: arrays overlap\n", __func__
);
2328 /* check num_members sanity */
2329 if (new_map
->num_members
> mpb
->num_disks
) {
2330 dprintf("%s: num_disks out of range\n", __func__
);
2334 super
->updates_pending
++;
2335 mpb
->num_raid_devs
++;
2336 dev
= get_imsm_dev(mpb
, u
->dev_idx
);
2337 memcpy(dev
, &u
->dev
, sizeof(*dev
));
2338 map
= &dev
->vol
.map
[0];
2339 memcpy(map
->disk_ord_tbl
, new_map
->disk_ord_tbl
,
2340 sizeof(__u32
) * new_map
->num_members
);
2342 /* fix up flags, if arrays overlap then the drives can not be
2345 for (i
= 0; i
< map
->num_members
; i
++) {
2346 struct imsm_disk
*disk
;
2349 disk
= get_imsm_disk(mpb
, get_imsm_disk_idx(map
, i
));
2350 status
= __le32_to_cpu(disk
->status
);
2351 status
|= CONFIGURED_DISK
;
2353 status
&= ~SPARE_DISK
;
2354 disk
->status
= __cpu_to_le32(status
);
2361 static void imsm_prepare_update(struct supertype
*st
,
2362 struct metadata_update
*update
)
2364 /* Allocate space to hold a new mpb if necessary. We currently
2365 * allocate enough to hold 2 subarrays for the given number of disks.
2366 * This may not be sufficient iff reshaping.
2368 * FIX ME handle the reshape case.
2370 * The monitor will be able to safely change super->mpb by arranging
2371 * for it to be freed in check_update_queue(). I.e. the monitor thread
2372 * will start using the new pointer and the manager can continue to use
2373 * the old value until check_update_queue() runs.
2379 struct superswitch super_imsm
= {
2381 .examine_super
= examine_super_imsm
,
2382 .brief_examine_super
= brief_examine_super_imsm
,
2383 .detail_super
= detail_super_imsm
,
2384 .brief_detail_super
= brief_detail_super_imsm
,
2385 .write_init_super
= write_init_super_imsm
,
2387 .match_home
= match_home_imsm
,
2388 .uuid_from_super
= uuid_from_super_imsm
,
2389 .getinfo_super
= getinfo_super_imsm
,
2390 .update_super
= update_super_imsm
,
2392 .avail_size
= avail_size_imsm
,
2394 .compare_super
= compare_super_imsm
,
2396 .load_super
= load_super_imsm
,
2397 .init_super
= init_super_imsm
,
2398 .add_to_super
= add_to_super_imsm
,
2399 .store_super
= store_zero_imsm
,
2400 .free_super
= free_super_imsm
,
2401 .match_metadata_desc
= match_metadata_desc_imsm
,
2402 .container_content
= container_content_imsm
,
2404 .validate_geometry
= validate_geometry_imsm
,
2408 .open_new
= imsm_open_new
,
2409 .load_super
= load_super_imsm
,
2410 .set_array_state
= imsm_set_array_state
,
2411 .set_disk
= imsm_set_disk
,
2412 .sync_metadata
= imsm_sync_metadata
,
2413 .activate_spare
= imsm_activate_spare
,
2414 .process_update
= imsm_process_update
,
2415 .prepare_update
= imsm_prepare_update
,