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 static struct supertype
*match_metadata_desc_imsm(char *arg
)
152 struct supertype
*st
;
154 if (strcmp(arg
, "imsm") != 0 &&
155 strcmp(arg
, "default") != 0
159 st
= malloc(sizeof(*st
));
160 memset(st
, 0, sizeof(*st
));
161 st
->ss
= &super_imsm
;
162 st
->max_devs
= IMSM_MAX_DEVICES
;
163 st
->minor_version
= 0;
168 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
170 return &mpb
->sig
[MPB_SIG_LEN
];
173 static struct imsm_disk
*get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
175 if (index
> mpb
->num_disks
- 1)
177 return &mpb
->disk
[index
];
180 static __u32
gen_imsm_checksum(struct imsm_super
*mpb
)
182 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
183 __u32
*p
= (__u32
*) mpb
;
187 sum
+= __le32_to_cpu(*p
++);
189 return sum
- __le32_to_cpu(mpb
->check_sum
);
192 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
)
194 size_t size
= sizeof(*dev
);
196 /* each map has disk_ord_tbl[num_members - 1] additional space */
197 size
+= sizeof(__u32
) * (dev
->vol
.map
[0].num_members
- 1);
199 /* migrating means an additional map */
200 if (dev
->vol
.migr_state
) {
201 size
+= sizeof(struct imsm_map
);
202 size
+= sizeof(__u32
) * (dev
->vol
.map
[1].num_members
- 1);
208 static struct imsm_dev
*get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
214 if (index
> mpb
->num_raid_devs
- 1)
217 /* devices start after all disks */
218 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
220 for (i
= 0; i
<= index
; i
++)
222 return _mpb
+ offset
;
224 offset
+= sizeof_imsm_dev(_mpb
+ offset
);
229 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
231 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
233 /* top byte is 'special' */
234 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
237 static int get_imsm_raid_level(struct imsm_map
*map
)
239 if (map
->raid_level
== 1) {
240 if (map
->num_members
== 2)
246 return map
->raid_level
;
249 static int cmp_extent(const void *av
, const void *bv
)
251 const struct extent
*a
= av
;
252 const struct extent
*b
= bv
;
253 if (a
->start
< b
->start
)
255 if (a
->start
> b
->start
)
260 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
262 /* find a list of used extents on the given physical device */
263 struct imsm_super
*mpb
= super
->mpb
;
264 struct imsm_disk
*disk
;
265 struct extent
*rv
, *e
;
269 disk
= get_imsm_disk(mpb
, dl
->index
);
273 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
274 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
275 struct imsm_map
*map
= dev
->vol
.map
;
277 for (j
= 0; j
< map
->num_members
; j
++) {
278 __u32 index
= get_imsm_disk_idx(map
, j
);
280 if (index
== dl
->index
)
284 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
289 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
290 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
291 struct imsm_map
*map
= dev
->vol
.map
;
293 for (j
= 0; j
< map
->num_members
; j
++) {
294 __u32 index
= get_imsm_disk_idx(map
, j
);
296 if (index
== dl
->index
) {
297 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
298 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
303 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
305 e
->start
= __le32_to_cpu(disk
->total_blocks
) -
306 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
312 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
316 struct imsm_map
*map
= dev
->vol
.map
;
319 printf("[%s]:\n", dev
->volume
);
320 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
321 printf(" Members : %d\n", map
->num_members
);
322 for (slot
= 0; slot
< map
->num_members
; slot
++)
323 if (index
== get_imsm_disk_idx(map
, slot
))
325 if (slot
< map
->num_members
)
326 printf(" This Slot : %d\n", slot
);
328 printf(" This Slot : ?\n");
329 sz
= __le32_to_cpu(dev
->size_high
);
331 sz
+= __le32_to_cpu(dev
->size_low
);
332 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
333 human_size(sz
* 512));
334 sz
= __le32_to_cpu(map
->blocks_per_member
);
335 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
336 human_size(sz
* 512));
337 printf(" Sector Offset : %u\n",
338 __le32_to_cpu(map
->pba_of_lba0
));
339 printf(" Num Stripes : %u\n",
340 __le32_to_cpu(map
->num_data_stripes
));
341 printf(" Chunk Size : %u KiB\n",
342 __le16_to_cpu(map
->blocks_per_strip
) / 2);
343 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
344 printf(" Migrate State : %s\n", dev
->vol
.migr_state
? "migrating" : "idle");
345 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
346 printf(" Map State : %s\n", map_state_str
[map
->map_state
]);
349 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
351 struct imsm_disk
*disk
= get_imsm_disk(mpb
, index
);
352 char str
[MAX_RAID_SERIAL_LEN
];
357 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
358 printf(" Disk%02d Serial : %s\n", index
, str
);
359 s
= __le32_to_cpu(disk
->status
);
360 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
361 s
&CONFIGURED_DISK
? " active" : "",
362 s
&FAILED_DISK
? " failed" : "",
363 s
&USABLE_DISK
? " usable" : "");
364 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
365 sz
= __le32_to_cpu(disk
->total_blocks
) -
366 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
367 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
368 human_size(sz
* 512));
371 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
373 struct intel_super
*super
= st
->sb
;
374 struct imsm_super
*mpb
= super
->mpb
;
375 char str
[MAX_SIGNATURE_LENGTH
];
379 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
380 printf(" Magic : %s\n", str
);
381 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
382 printf(" Version : %s\n", get_imsm_version(mpb
));
383 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
384 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
385 sum
= __le32_to_cpu(mpb
->check_sum
);
386 printf(" Checksum : %08x %s\n", sum
,
387 gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
388 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
389 printf(" Disks : %d\n", mpb
->num_disks
);
390 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
391 print_imsm_disk(mpb
, super
->disks
->index
);
392 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
393 print_imsm_dev(get_imsm_dev(mpb
, i
), super
->disks
->index
);
394 for (i
= 0; i
< mpb
->num_disks
; i
++) {
395 if (i
== super
->disks
->index
)
397 print_imsm_disk(mpb
, i
);
401 static void brief_examine_super_imsm(struct supertype
*st
)
403 struct intel_super
*super
= st
->sb
;
404 struct imsm_super
*mpb
= super
->mpb
;
406 printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
407 __le32_to_cpu(mpb
->family_num
));
410 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
412 printf("%s\n", __FUNCTION__
);
415 static void brief_detail_super_imsm(struct supertype
*st
)
417 printf("%s\n", __FUNCTION__
);
421 static int match_home_imsm(struct supertype
*st
, char *homehost
)
423 printf("%s\n", __FUNCTION__
);
428 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
430 printf("%s\n", __FUNCTION__
);
435 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
437 __u8
*v
= get_imsm_version(mpb
);
438 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
439 char major
[] = { 0, 0, 0 };
440 char minor
[] = { 0 ,0, 0 };
441 char patch
[] = { 0, 0, 0 };
442 char *ver_parse
[] = { major
, minor
, patch
};
446 while (*v
!= '\0' && v
< end
) {
447 if (*v
!= '.' && j
< 2)
448 ver_parse
[i
][j
++] = *v
;
456 *m
= strtol(minor
, NULL
, 0);
457 *p
= strtol(patch
, NULL
, 0);
461 static int imsm_level_to_layout(int level
)
469 return ALGORITHM_LEFT_SYMMETRIC
;
471 return 0x102; //FIXME is this correct?
476 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
478 struct intel_super
*super
= st
->sb
;
479 struct imsm_super
*mpb
= super
->mpb
;
480 struct imsm_dev
*dev
= get_imsm_dev(mpb
, super
->current_vol
);
481 struct imsm_map
*map
= &dev
->vol
.map
[0];
483 info
->container_member
= super
->current_vol
;
484 info
->array
.raid_disks
= map
->num_members
;
485 info
->array
.level
= get_imsm_raid_level(map
);
486 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
487 info
->array
.md_minor
= -1;
488 info
->array
.ctime
= 0;
489 info
->array
.utime
= 0;
490 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
492 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
493 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
495 info
->disk
.major
= 0;
496 info
->disk
.minor
= 0;
498 sprintf(info
->text_version
, "/%s/%d",
499 devnum2devname(st
->container_dev
),
500 info
->container_member
);
504 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
506 struct intel_super
*super
= st
->sb
;
507 struct imsm_super
*mpb
= super
->mpb
;
508 struct imsm_disk
*disk
;
511 if (super
->current_vol
>= 0) {
512 getinfo_super_imsm_volume(st
, info
);
515 info
->array
.raid_disks
= mpb
->num_disks
;
516 info
->array
.level
= LEVEL_CONTAINER
;
517 info
->array
.layout
= 0;
518 info
->array
.md_minor
= -1;
519 info
->array
.ctime
= 0; /* N/A for imsm */
520 info
->array
.utime
= 0;
521 info
->array
.chunk_size
= 0;
523 info
->disk
.major
= 0;
524 info
->disk
.minor
= 0;
525 info
->disk
.raid_disk
= -1;
526 info
->reshape_active
= 0;
527 strcpy(info
->text_version
, "imsm");
528 info
->disk
.number
= -1;
529 info
->disk
.state
= 0;
532 disk
= get_imsm_disk(mpb
, super
->disks
->index
);
533 info
->disk
.number
= super
->disks
->index
;
534 info
->disk
.raid_disk
= super
->disks
->index
;
535 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
536 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
537 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
538 s
= __le32_to_cpu(disk
->status
);
539 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
540 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
541 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
545 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
546 char *update
, char *devname
, int verbose
,
547 int uuid_set
, char *homehost
)
551 /* For 'assemble' and 'force' we need to return non-zero if any
552 * change was made. For others, the return value is ignored.
553 * Update options are:
554 * force-one : This device looks a bit old but needs to be included,
555 * update age info appropriately.
556 * assemble: clear any 'faulty' flag to allow this device to
558 * force-array: Array is degraded but being forced, mark it clean
559 * if that will be needed to assemble it.
561 * newdev: not used ????
562 * grow: Array has gained a new device - this is currently for
564 * resync: mark as dirty so a resync will happen.
565 * name: update the name - preserving the homehost
567 * Following are not relevant for this imsm:
568 * sparc2.2 : update from old dodgey metadata
569 * super-minor: change the preferred_minor number
570 * summaries: update redundant counters.
571 * uuid: Change the uuid of the array to match watch is given
572 * homehost: update the recorded homehost
573 * _reshape_progress: record new reshape_progress position.
576 //struct intel_super *super = st->sb;
577 //struct imsm_super *mpb = super->mpb;
579 if (strcmp(update
, "grow") == 0) {
581 if (strcmp(update
, "resync") == 0) {
582 /* dev->vol.dirty = 1; */
585 /* IMSM has no concept of UUID or homehost */
590 static size_t disks_to_mpb_size(int disks
)
594 size
= sizeof(struct imsm_super
);
595 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
596 size
+= 2 * sizeof(struct imsm_dev
);
597 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
598 size
+= (4 - 2) * sizeof(struct imsm_map
);
599 /* 4 possible disk_ord_tbl's */
600 size
+= 4 * (disks
- 1) * sizeof(__u32
);
605 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
607 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
610 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
613 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
617 * 0 same, or first was empty, and second was copied
618 * 1 second had wrong number
622 struct intel_super
*first
= st
->sb
;
623 struct intel_super
*sec
= tst
->sb
;
631 if (memcmp(first
->mpb
->sig
, sec
->mpb
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
633 if (first
->mpb
->family_num
!= sec
->mpb
->family_num
)
635 if (first
->mpb
->mpb_size
!= sec
->mpb
->mpb_size
)
637 if (first
->mpb
->check_sum
!= sec
->mpb
->check_sum
)
643 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
645 static int imsm_read_serial(int fd
, char *devname
,
646 __u8 serial
[MAX_RAID_SERIAL_LEN
])
648 unsigned char scsi_serial
[255];
654 memset(scsi_serial
, 0, sizeof(scsi_serial
));
656 sg_fd
= sysfs_disk_to_sg(fd
);
660 Name
": Failed to open sg interface for %s: %s\n",
661 devname
, strerror(errno
));
665 rv
= scsi_get_serial(sg_fd
, scsi_serial
, sizeof(scsi_serial
));
671 Name
": Failed to retrieve serial for %s\n",
676 rsp_len
= scsi_serial
[3];
677 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
678 if (!isspace(scsi_serial
[4 + i
]))
679 serial
[cnt
++] = scsi_serial
[4 + i
];
680 if (cnt
== MAX_RAID_SERIAL_LEN
)
684 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
690 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
692 struct imsm_super
*mpb
= super
->mpb
;
695 struct imsm_disk
*disk
;
699 dl
= malloc(sizeof(*dl
));
703 Name
": failed to allocate disk buffer for %s\n",
707 memset(dl
, 0, sizeof(*dl
));
710 dl
->major
= major(stb
.st_rdev
);
711 dl
->minor
= minor(stb
.st_rdev
);
712 dl
->next
= super
->disks
;
713 dl
->fd
= keep_fd
? fd
: -1;
714 dl
->devname
= devname
? strdup(devname
) : NULL
;
717 rv
= imsm_read_serial(fd
, devname
, dl
->serial
);
722 /* look up this disk's index */
723 for (i
= 0; i
< mpb
->num_disks
; i
++) {
724 disk
= get_imsm_disk(mpb
, i
);
726 if (memcmp(disk
->serial
, dl
->serial
, MAX_RAID_SERIAL_LEN
) == 0)
730 if (i
> mpb
->num_disks
)
738 /* load_imsm_mpb - read matrix metadata
739 * allocates super->mpb to be freed by free_super
741 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
743 unsigned long long dsize
;
744 size_t len
, mpb_size
;
745 unsigned long long sectors
;
747 struct imsm_super
*anchor
;
750 get_dev_size(fd
, NULL
, &dsize
);
752 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
755 Name
": Cannot seek to anchor block on %s: %s\n",
756 devname
, strerror(errno
));
761 if (posix_memalign((void**)&anchor
, 512, len
) != 0) {
764 Name
": Failed to allocate imsm anchor buffer"
765 " on %s\n", devname
);
768 if (read(fd
, anchor
, len
) != len
) {
771 Name
": Cannot read anchor block on %s: %s\n",
772 devname
, strerror(errno
));
777 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
780 Name
": no IMSM anchor on %s\n", devname
);
785 mpb_size
= __le32_to_cpu(anchor
->mpb_size
);
786 mpb_size
= ROUND_UP(mpb_size
, 512);
787 if (posix_memalign((void**)&super
->mpb
, 512, mpb_size
) != 0) {
790 Name
": unable to allocate %zu byte mpb buffer\n",
795 memcpy(super
->buf
, anchor
, len
);
797 sectors
= mpb_sectors(anchor
) - 1;
800 return load_imsm_disk(fd
, super
, devname
, 0);
802 /* read the extended mpb */
803 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
806 Name
": Cannot seek to extended mpb on %s: %s\n",
807 devname
, strerror(errno
));
811 len
= mpb_size
- 512;
812 if (read(fd
, super
->buf
+ 512, len
) != len
) {
815 Name
": Cannot read extended mpb on %s: %s\n",
816 devname
, strerror(errno
));
820 check_sum
= gen_imsm_checksum(super
->mpb
);
821 if (check_sum
!= __le32_to_cpu(super
->mpb
->check_sum
)) {
824 Name
": IMSM checksum %x != %x on %s\n",
825 check_sum
, __le32_to_cpu(super
->mpb
->check_sum
),
830 return load_imsm_disk(fd
, super
, devname
, 0);
833 static void free_imsm_disks(struct intel_super
*super
)
835 while (super
->disks
) {
836 struct dl
*d
= super
->disks
;
838 super
->disks
= d
->next
;
847 static void free_imsm(struct intel_super
*super
)
851 free_imsm_disks(super
);
856 static void free_super_imsm(struct supertype
*st
)
858 struct intel_super
*super
= st
->sb
;
867 static struct intel_super
*alloc_super(int creating_imsm
)
869 struct intel_super
*super
= malloc(sizeof(*super
));
872 memset(super
, 0, sizeof(*super
));
873 super
->creating_imsm
= creating_imsm
;
874 super
->current_vol
= -1;
881 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
882 char *devname
, int keep_fd
)
885 struct intel_super
*super
;
886 struct mdinfo
*sd
, *best
= NULL
;
893 /* check if this disk is a member of an active array */
894 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
898 if (sra
->array
.major_version
!= -1 ||
899 sra
->array
.minor_version
!= -2 ||
900 strcmp(sra
->text_version
, "imsm") != 0)
903 super
= alloc_super(0);
907 /* find the most up to date disk in this array */
908 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
909 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
910 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
915 rv
= load_imsm_mpb(dfd
, super
, NULL
);
919 gen
= __le32_to_cpu(super
->mpb
->generation_num
);
920 if (!best
|| gen
> bestgen
) {
935 /* load the most up to date anchor */
936 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
937 dfd
= dev_open(nm
, O_RDONLY
);
942 rv
= load_imsm_mpb(dfd
, super
, NULL
);
949 /* reset the disk list */
950 free_imsm_disks(super
);
952 /* populate disk list */
953 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
954 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
955 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
960 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
965 if (st
->subarray
[0]) {
966 if (atoi(st
->subarray
) <= super
->mpb
->num_raid_devs
)
967 super
->current_vol
= atoi(st
->subarray
);
973 if (st
->ss
== NULL
) {
974 st
->ss
= &super_imsm
;
975 st
->minor_version
= 0;
976 st
->max_devs
= IMSM_MAX_DEVICES
;
977 st
->container_dev
= fd2devnum(fd
);
984 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
986 struct intel_super
*super
;
990 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
994 return 1; /* FIXME */
996 super
= alloc_super(0);
999 Name
": malloc of %zu failed.\n",
1004 rv
= load_imsm_mpb(fd
, super
, devname
);
1009 Name
": Failed to load all information "
1010 "sections on %s\n", devname
);
1016 if (st
->ss
== NULL
) {
1017 st
->ss
= &super_imsm
;
1018 st
->minor_version
= 0;
1019 st
->max_devs
= IMSM_MAX_DEVICES
;
1025 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1027 if (info
->level
== 1)
1029 return info
->chunk_size
>> 9;
1032 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1036 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1037 if (info
->level
== 1)
1043 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1044 unsigned long long size
, char *name
,
1045 char *homehost
, int *uuid
)
1047 /* We are creating a volume inside a pre-existing container.
1048 * so st->sb is already set.
1050 struct intel_super
*super
= st
->sb
;
1051 struct imsm_super
*mpb
= super
->mpb
;
1052 struct imsm_dev
*dev
;
1053 struct imsm_vol
*vol
;
1054 struct imsm_map
*map
;
1055 int idx
= mpb
->num_raid_devs
;
1057 unsigned long long array_blocks
;
1059 size_t size_old
, size_new
;
1061 if (mpb
->num_raid_devs
>= 2) {
1062 fprintf(stderr
, Name
": This imsm-container already has the "
1063 "maximum of 2 volumes\n");
1067 /* ensure the mpb is large enough for the new data */
1068 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1069 size_new
= disks_to_mpb_size(info
->nr_disks
);
1070 if (size_new
> size_old
) {
1072 size_t size_round
= ROUND_UP(size_new
, 512);
1074 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1075 fprintf(stderr
, Name
": could not allocate new mpb\n");
1078 memcpy(mpb_new
, mpb
, size_old
);
1081 super
->mpb
= mpb_new
;
1082 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1083 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1085 super
->current_vol
= idx
;
1086 sprintf(st
->subarray
, "%d", idx
);
1087 mpb
->num_raid_devs
++;
1088 dev
= get_imsm_dev(mpb
, idx
);
1089 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1090 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1091 info
->layout
, info
->chunk_size
,
1093 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1094 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1095 dev
->status
= __cpu_to_le32(0);
1096 dev
->reserved_blocks
= __cpu_to_le32(0);
1098 vol
->migr_state
= 0;
1101 for (i
= 0; i
< idx
; i
++) {
1102 struct imsm_dev
*prev
= get_imsm_dev(mpb
, i
);
1103 struct imsm_map
*pmap
= &prev
->vol
.map
[0];
1105 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1106 offset
+= IMSM_RESERVED_SECTORS
;
1109 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1110 map
->blocks_per_member
= __cpu_to_le32(info
->size
* 2);
1111 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1112 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1113 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1114 IMSM_T_STATE_NORMAL
;
1116 if (info
->level
== 1 && info
->raid_disks
> 2) {
1117 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1118 "in a raid1 volume\n");
1121 if (info
->level
== 10)
1122 map
->raid_level
= 1;
1124 map
->raid_level
= info
->level
;
1126 map
->num_members
= info
->raid_disks
;
1127 for (i
= 0; i
< map
->num_members
; i
++) {
1128 /* initialized in add_to_super */
1129 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1135 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1136 unsigned long long size
, char *name
,
1137 char *homehost
, int *uuid
)
1139 /* This is primarily called by Create when creating a new array.
1140 * We will then get add_to_super called for each component, and then
1141 * write_init_super called to write it out to each device.
1142 * For IMSM, Create can create on fresh devices or on a pre-existing
1144 * To create on a pre-existing array a different method will be called.
1145 * This one is just for fresh drives.
1147 struct intel_super
*super
;
1148 struct imsm_super
*mpb
;
1156 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1159 super
= alloc_super(1);
1162 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1163 if (posix_memalign((void**)&mpb
, 512, mpb_size
) != 0) {
1167 memset(mpb
, 0, mpb_size
);
1169 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1170 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1171 strlen(MPB_VERSION_RAID5
));
1172 mpb
->mpb_size
= mpb_size
;
1179 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1180 int fd
, char *devname
)
1182 struct intel_super
*super
= st
->sb
;
1183 struct imsm_super
*mpb
= super
->mpb
;
1185 struct imsm_dev
*dev
;
1186 struct imsm_map
*map
;
1187 struct imsm_disk
*disk
;
1190 dev
= get_imsm_dev(mpb
, super
->current_vol
);
1191 map
= &dev
->vol
.map
[0];
1193 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1194 if (dl
->major
== dk
->major
&&
1195 dl
->minor
== dk
->minor
)
1197 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1200 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1202 disk
= get_imsm_disk(mpb
, dl
->index
);
1203 status
= CONFIGURED_DISK
| USABLE_DISK
;
1204 disk
->status
= __cpu_to_le32(status
);
1207 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1208 int fd
, char *devname
)
1210 struct intel_super
*super
= st
->sb
;
1211 struct imsm_super
*mpb
= super
->mpb
;
1212 struct imsm_disk
*disk
;
1214 unsigned long long size
;
1219 if (super
->current_vol
>= 0) {
1220 add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1225 dd
= malloc(sizeof(*dd
));
1228 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1231 memset(dd
, 0, sizeof(*dd
));
1232 dd
->major
= major(stb
.st_rdev
);
1233 dd
->minor
= minor(stb
.st_rdev
);
1234 dd
->index
= dk
->number
;
1235 dd
->devname
= devname
? strdup(devname
) : NULL
;
1236 dd
->next
= super
->disks
;
1238 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1241 Name
": failed to retrieve scsi serial "
1242 "using \'%s\' instead\n", devname
);
1243 strcpy((char *) dd
->serial
, devname
);
1246 if (mpb
->num_disks
<= dk
->number
)
1247 mpb
->num_disks
= dk
->number
+ 1;
1249 disk
= get_imsm_disk(mpb
, dk
->number
);
1250 get_dev_size(fd
, NULL
, &size
);
1252 status
= USABLE_DISK
| SPARE_DISK
;
1253 strcpy((char *) disk
->serial
, (char *) dd
->serial
);
1254 disk
->total_blocks
= __cpu_to_le32(size
);
1255 disk
->status
= __cpu_to_le32(status
);
1256 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1257 disk
->scsi_id
= __cpu_to_le32(id
);
1259 disk
->scsi_id
= __cpu_to_le32(0);
1261 /* update the family number if we are creating a container */
1262 if (super
->creating_imsm
)
1263 mpb
->family_num
= __cpu_to_le32(gen_imsm_checksum(mpb
));
1268 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1270 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1272 struct imsm_super
*mpb
= super
->mpb
;
1277 /* 'generation' is incremented everytime the metadata is written */
1278 generation
= __le32_to_cpu(mpb
->generation_num
);
1280 mpb
->generation_num
= __cpu_to_le32(generation
);
1282 /* recalculate checksum */
1283 sum
= gen_imsm_checksum(mpb
);
1284 mpb
->check_sum
= __cpu_to_le32(sum
);
1286 for (d
= super
->disks
; d
; d
= d
->next
) {
1287 if (store_imsm_mpb(d
->fd
, super
)) {
1288 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1289 __func__
, d
->major
, d
->minor
, strerror(errno
));
1301 static int write_init_super_imsm(struct supertype
*st
)
1303 return write_super_imsm(st
->sb
, 1);
1306 static int store_zero_imsm(struct supertype
*st
, int fd
)
1308 unsigned long long dsize
;
1311 get_dev_size(fd
, NULL
, &dsize
);
1313 /* first block is stored on second to last sector of the disk */
1314 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1317 if (posix_memalign(&buf
, 512, 512) != 0)
1320 memset(buf
, 0, sizeof(buf
));
1321 if (write(fd
, buf
, sizeof(buf
)) != sizeof(buf
))
1326 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1327 int layout
, int raiddisks
, int chunk
,
1328 unsigned long long size
, char *dev
,
1329 unsigned long long *freesize
,
1333 unsigned long long ldsize
;
1335 if (level
!= LEVEL_CONTAINER
)
1340 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1343 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
1344 dev
, strerror(errno
));
1347 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1353 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1358 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1359 * FIX ME add ahci details
1361 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1362 int layout
, int raiddisks
, int chunk
,
1363 unsigned long long size
, char *dev
,
1364 unsigned long long *freesize
,
1368 struct intel_super
*super
= st
->sb
;
1370 unsigned long long pos
= 0;
1371 unsigned long long maxsize
;
1375 if (level
== LEVEL_CONTAINER
)
1378 if (level
== 1 && raiddisks
> 2) {
1380 fprintf(stderr
, Name
": imsm does not support more "
1381 "than 2 in a raid1 configuration\n");
1385 /* We must have the container info already read in. */
1390 /* General test: make sure there is space for
1391 * 'raiddisks' device extents of size 'size'.
1393 unsigned long long minsize
= size
*2 /* convert to blocks */;
1396 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1397 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1402 e
= get_extents(super
, dl
);
1405 unsigned long long esize
;
1406 esize
= e
[i
].start
- pos
;
1407 if (esize
>= minsize
)
1409 pos
= e
[i
].start
+ e
[i
].size
;
1411 } while (e
[i
-1].size
);
1416 if (dcnt
< raiddisks
) {
1418 fprintf(stderr
, Name
": imsm: Not enough "
1419 "devices with space for this array "
1426 /* This device must be a member of the set */
1427 if (stat(dev
, &stb
) < 0)
1429 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1431 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1432 if (dl
->major
== major(stb
.st_rdev
) &&
1433 dl
->minor
== minor(stb
.st_rdev
))
1438 fprintf(stderr
, Name
": %s is not in the "
1439 "same imsm set\n", dev
);
1442 e
= get_extents(super
, dl
);
1446 unsigned long long esize
;
1447 esize
= e
[i
].start
- pos
;
1448 if (esize
>= maxsize
)
1450 pos
= e
[i
].start
+ e
[i
].size
;
1452 } while (e
[i
-1].size
);
1453 *freesize
= maxsize
;
1458 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1459 int raiddisks
, int chunk
, unsigned long long size
,
1460 char *dev
, unsigned long long *freesize
,
1466 /* if given unused devices create a container
1467 * if given given devices in a container create a member volume
1469 if (level
== LEVEL_CONTAINER
) {
1470 /* Must be a fresh device to add to a container */
1471 return validate_geometry_imsm_container(st
, level
, layout
,
1472 raiddisks
, chunk
, size
,
1478 /* creating in a given container */
1479 return validate_geometry_imsm_volume(st
, level
, layout
,
1480 raiddisks
, chunk
, size
,
1481 dev
, freesize
, verbose
);
1484 /* limit creation to the following levels */
1496 /* This device needs to be a device in an 'imsm' container */
1497 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1501 Name
": Cannot create this array on device %s\n",
1506 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
1508 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1509 dev
, strerror(errno
));
1512 /* Well, it is in use by someone, maybe an 'imsm' container. */
1513 cfd
= open_container(fd
);
1517 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
1521 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
1523 if (sra
&& sra
->array
.major_version
== -1 &&
1524 strcmp(sra
->text_version
, "imsm") == 0) {
1525 /* This is a member of a imsm container. Load the container
1526 * and try to create a volume
1528 struct intel_super
*super
;
1530 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
1532 st
->container_dev
= fd2devnum(cfd
);
1534 return validate_geometry_imsm_volume(st
, level
, layout
,
1540 } else /* may belong to another container */
1546 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
1548 /* Given a container loaded by load_super_imsm_all,
1549 * extract information about all the arrays into
1552 * For each imsm_dev create an mdinfo, fill it in,
1553 * then look for matching devices in super->disks
1554 * and create appropriate device mdinfo.
1556 struct intel_super
*super
= st
->sb
;
1557 struct imsm_super
*mpb
= super
->mpb
;
1558 struct mdinfo
*rest
= NULL
;
1561 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1562 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
1563 struct imsm_vol
*vol
= &dev
->vol
;
1564 struct imsm_map
*map
= vol
->map
;
1565 struct mdinfo
*this;
1569 this = malloc(sizeof(*this));
1570 memset(this, 0, sizeof(*this));
1574 this->array
.level
= get_imsm_raid_level(map
);
1575 this->array
.raid_disks
= map
->num_members
;
1576 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
1577 this->array
.md_minor
= -1;
1578 this->array
.ctime
= 0;
1579 this->array
.utime
= 0;
1580 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1581 this->array
.state
= !vol
->dirty
;
1582 this->container_member
= i
;
1583 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1584 this->resync_start
= 0;
1586 this->resync_start
= ~0ULL;
1588 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1589 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
1591 sprintf(this->text_version
, "/%s/%d",
1592 devnum2devname(st
->container_dev
),
1593 this->container_member
);
1595 memset(this->uuid
, 0, sizeof(this->uuid
));
1597 sz
= __le32_to_cpu(dev
->size_high
);
1599 sz
+= __le32_to_cpu(dev
->size_low
);
1600 this->component_size
= sz
;
1601 this->array
.size
= this->component_size
/ 2;
1603 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
1604 struct imsm_disk
*disk
;
1605 struct mdinfo
*info_d
;
1610 idx
= __le32_to_cpu(map
->disk_ord_tbl
[slot
] & ~(0xff << 24));
1611 for (d
= super
->disks
; d
; d
= d
->next
)
1612 if (d
->index
== idx
)
1616 break; /* shouldn't this be continue ?? */
1618 info_d
= malloc(sizeof(*info_d
));
1620 break; /* ditto ?? */
1621 memset(info_d
, 0, sizeof(*info_d
));
1622 info_d
->next
= this->devs
;
1623 this->devs
= info_d
;
1625 disk
= get_imsm_disk(mpb
, idx
);
1626 s
= __le32_to_cpu(disk
->status
);
1628 info_d
->disk
.number
= d
->index
;
1629 info_d
->disk
.major
= d
->major
;
1630 info_d
->disk
.minor
= d
->minor
;
1631 info_d
->disk
.raid_disk
= slot
;
1632 info_d
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
1633 info_d
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
1634 info_d
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
1636 this->array
.working_disks
++;
1638 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
1639 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1640 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1642 strcpy(info_d
->name
, d
->devname
);
1650 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
1653 struct intel_super
*super
= c
->sb
;
1654 struct imsm_super
*mpb
= super
->mpb
;
1656 if (atoi(inst
) + 1 > mpb
->num_raid_devs
) {
1657 fprintf(stderr
, "%s: subarry index %d, out of range\n",
1658 __func__
, atoi(inst
));
1662 dprintf("imsm: open_new %s\n", inst
);
1663 a
->info
.container_member
= atoi(inst
);
1667 static __u8
imsm_check_degraded(struct imsm_super
*mpb
, int n
, int failed
)
1669 struct imsm_dev
*dev
= get_imsm_dev(mpb
, n
);
1670 struct imsm_map
*map
= dev
->vol
.map
;
1673 return map
->map_state
;
1675 switch (get_imsm_raid_level(map
)) {
1677 return IMSM_T_STATE_FAILED
;
1680 if (failed
< map
->num_members
)
1681 return IMSM_T_STATE_DEGRADED
;
1683 return IMSM_T_STATE_FAILED
;
1688 * check to see if any mirrors have failed,
1689 * otherwise we are degraded
1691 int device_per_mirror
= 2; /* FIXME is this always the case?
1692 * and are they always adjacent?
1697 for (i
= 0; i
< map
->num_members
; i
++) {
1698 int idx
= get_imsm_disk_idx(map
, i
);
1699 struct imsm_disk
*disk
= get_imsm_disk(mpb
, idx
);
1701 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1704 if (failed
>= device_per_mirror
)
1705 return IMSM_T_STATE_FAILED
;
1707 /* reset 'failed' for next mirror set */
1708 if (!((i
+ 1) % device_per_mirror
))
1712 return IMSM_T_STATE_DEGRADED
;
1716 return IMSM_T_STATE_DEGRADED
;
1718 return IMSM_T_STATE_FAILED
;
1724 return map
->map_state
;
1727 static int imsm_count_failed(struct imsm_super
*mpb
, struct imsm_map
*map
)
1731 struct imsm_disk
*disk
;
1733 for (i
= 0; i
< map
->num_members
; i
++) {
1734 int idx
= get_imsm_disk_idx(map
, i
);
1736 disk
= get_imsm_disk(mpb
, idx
);
1737 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1744 static void imsm_set_array_state(struct active_array
*a
, int consistent
)
1746 int inst
= a
->info
.container_member
;
1747 struct intel_super
*super
= a
->container
->sb
;
1748 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1749 struct imsm_map
*map
= &dev
->vol
.map
[0];
1750 int dirty
= !consistent
;
1754 if (a
->resync_start
== ~0ULL) {
1755 failed
= imsm_count_failed(super
->mpb
, map
);
1756 map_state
= imsm_check_degraded(super
->mpb
, inst
, failed
);
1758 map_state
= IMSM_T_STATE_NORMAL
;
1759 if (map
->map_state
!= map_state
) {
1760 dprintf("imsm: map_state %d: %d\n",
1762 map
->map_state
= map_state
;
1763 super
->updates_pending
++;
1767 if (dev
->vol
.dirty
!= dirty
) {
1768 dprintf("imsm: mark '%s' (%llu)\n",
1769 dirty
?"dirty":"clean", a
->resync_start
);
1771 dev
->vol
.dirty
= dirty
;
1772 super
->updates_pending
++;
1776 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
1778 int inst
= a
->info
.container_member
;
1779 struct intel_super
*super
= a
->container
->sb
;
1780 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1781 struct imsm_map
*map
= dev
->vol
.map
;
1782 struct imsm_disk
*disk
;
1785 int new_failure
= 0;
1787 if (n
> map
->num_members
)
1788 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
1789 n
, map
->num_members
- 1);
1794 dprintf("imsm: set_disk %d:%x\n", n
, state
);
1796 disk
= get_imsm_disk(super
->mpb
, get_imsm_disk_idx(map
, n
));
1798 /* check if we have seen this failure before */
1799 status
= __le32_to_cpu(disk
->status
);
1800 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
1801 status
|= FAILED_DISK
;
1802 disk
->status
= __cpu_to_le32(status
);
1807 * the number of failures have changed, count up 'failed' to determine
1808 * degraded / failed status
1810 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
1811 failed
= imsm_count_failed(super
->mpb
, map
);
1814 map
->map_state
= imsm_check_degraded(super
->mpb
, inst
, failed
);
1817 super
->updates_pending
++;
1820 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
1822 struct imsm_super
*mpb
= super
->mpb
;
1823 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
1824 unsigned long long dsize
;
1825 unsigned long long sectors
;
1827 get_dev_size(fd
, NULL
, &dsize
);
1829 if (mpb_size
> 512) {
1830 /* -1 to account for anchor */
1831 sectors
= mpb_sectors(mpb
) - 1;
1833 /* write the extended mpb to the sectors preceeding the anchor */
1834 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
1837 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
1841 /* first block is stored on second to last sector of the disk */
1842 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1845 if (write(fd
, super
->buf
, 512) != 512)
1851 static void imsm_sync_metadata(struct supertype
*container
)
1853 struct intel_super
*super
= container
->sb
;
1855 if (!super
->updates_pending
)
1858 write_super_imsm(super
, 0);
1860 super
->updates_pending
= 0;
1863 struct superswitch super_imsm
= {
1865 .examine_super
= examine_super_imsm
,
1866 .brief_examine_super
= brief_examine_super_imsm
,
1867 .detail_super
= detail_super_imsm
,
1868 .brief_detail_super
= brief_detail_super_imsm
,
1869 .write_init_super
= write_init_super_imsm
,
1871 .match_home
= match_home_imsm
,
1872 .uuid_from_super
= uuid_from_super_imsm
,
1873 .getinfo_super
= getinfo_super_imsm
,
1874 .update_super
= update_super_imsm
,
1876 .avail_size
= avail_size_imsm
,
1878 .compare_super
= compare_super_imsm
,
1880 .load_super
= load_super_imsm
,
1881 .init_super
= init_super_imsm
,
1882 .add_to_super
= add_to_super_imsm
,
1883 .store_super
= store_zero_imsm
,
1884 .free_super
= free_super_imsm
,
1885 .match_metadata_desc
= match_metadata_desc_imsm
,
1886 .container_content
= container_content_imsm
,
1888 .validate_geometry
= validate_geometry_imsm
,
1892 .open_new
= imsm_open_new
,
1893 .load_super
= load_super_imsm
,
1894 .set_array_state
= imsm_set_array_state
,
1895 .set_disk
= imsm_set_disk
,
1896 .sync_metadata
= imsm_sync_metadata
,