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 creating_dev
; /* 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 st
->ss
= &super_imsm
;
161 st
->max_devs
= IMSM_MAX_DEVICES
;
162 st
->minor_version
= 0;
167 static struct supertype
*match_metadata_desc_imsm_volume(char *arg
)
169 struct supertype
*st
;
171 if (strcmp(arg
, "imsm/volume") != 0 &&
172 strcmp(arg
, "raid") != 0 &&
173 strcmp(arg
, "default") != 0
177 st
= malloc(sizeof(*st
));
178 st
->ss
= &super_imsm_volume
;
179 st
->max_devs
= IMSM_MAX_DEVICES
;
180 st
->minor_version
= 0;
185 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
187 return &mpb
->sig
[MPB_SIG_LEN
];
190 static struct imsm_disk
*get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
192 if (index
> mpb
->num_disks
- 1)
194 return &mpb
->disk
[index
];
197 static __u32
gen_imsm_checksum(struct imsm_super
*mpb
)
199 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
200 __u32
*p
= (__u32
*) mpb
;
204 sum
+= __le32_to_cpu(*p
++);
206 return sum
- __le32_to_cpu(mpb
->check_sum
);
209 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
)
211 size_t size
= sizeof(*dev
);
213 /* each map has disk_ord_tbl[num_members - 1] additional space */
214 size
+= sizeof(__u32
) * (dev
->vol
.map
[0].num_members
- 1);
216 /* migrating means an additional map */
217 if (dev
->vol
.migr_state
) {
218 size
+= sizeof(struct imsm_map
);
219 size
+= sizeof(__u32
) * (dev
->vol
.map
[1].num_members
- 1);
225 static struct imsm_dev
*get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
231 if (index
> mpb
->num_raid_devs
- 1)
234 /* devices start after all disks */
235 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
237 for (i
= 0; i
<= index
; i
++)
239 return _mpb
+ offset
;
241 offset
+= sizeof_imsm_dev(_mpb
+ offset
);
246 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
248 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
250 /* top byte is 'special' */
251 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
254 static int get_imsm_raid_level(struct imsm_map
*map
)
256 if (map
->raid_level
== 1) {
257 if (map
->num_members
== 2)
263 return map
->raid_level
;
266 static int cmp_extent(const void *av
, const void *bv
)
268 const struct extent
*a
= av
;
269 const struct extent
*b
= bv
;
270 if (a
->start
< b
->start
)
272 if (a
->start
> b
->start
)
277 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
279 /* find a list of used extents on the given physical device */
280 struct imsm_super
*mpb
= super
->mpb
;
281 struct imsm_disk
*disk
;
282 struct extent
*rv
, *e
;
286 disk
= get_imsm_disk(mpb
, dl
->index
);
290 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
291 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
292 struct imsm_map
*map
= dev
->vol
.map
;
294 for (j
= 0; j
< map
->num_members
; j
++) {
295 __u32 index
= get_imsm_disk_idx(map
, j
);
297 if (index
== dl
->index
)
301 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
306 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
307 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
308 struct imsm_map
*map
= dev
->vol
.map
;
310 for (j
= 0; j
< map
->num_members
; j
++) {
311 __u32 index
= get_imsm_disk_idx(map
, j
);
313 if (index
== dl
->index
) {
314 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
315 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
320 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
322 e
->start
= __le32_to_cpu(disk
->total_blocks
) -
323 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
329 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
333 struct imsm_map
*map
= dev
->vol
.map
;
336 printf("[%s]:\n", dev
->volume
);
337 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
338 printf(" Members : %d\n", map
->num_members
);
339 for (slot
= 0; slot
< map
->num_members
; slot
++)
340 if (index
== get_imsm_disk_idx(map
, slot
))
342 if (slot
< map
->num_members
)
343 printf(" This Slot : %d\n", slot
);
345 printf(" This Slot : ?\n");
346 sz
= __le32_to_cpu(dev
->size_high
);
348 sz
+= __le32_to_cpu(dev
->size_low
);
349 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
350 human_size(sz
* 512));
351 sz
= __le32_to_cpu(map
->blocks_per_member
);
352 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
353 human_size(sz
* 512));
354 printf(" Sector Offset : %u\n",
355 __le32_to_cpu(map
->pba_of_lba0
));
356 printf(" Num Stripes : %u\n",
357 __le32_to_cpu(map
->num_data_stripes
));
358 printf(" Chunk Size : %u KiB\n",
359 __le16_to_cpu(map
->blocks_per_strip
) / 2);
360 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
361 printf(" Migrate State : %s\n", dev
->vol
.migr_state
? "migrating" : "idle");
362 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
363 printf(" Map State : %s\n", map_state_str
[map
->map_state
]);
366 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
368 struct imsm_disk
*disk
= get_imsm_disk(mpb
, index
);
369 char str
[MAX_RAID_SERIAL_LEN
];
374 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
375 printf(" Disk%02d Serial : %s\n", index
, str
);
376 s
= __le32_to_cpu(disk
->status
);
377 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
378 s
&CONFIGURED_DISK
? " active" : "",
379 s
&FAILED_DISK
? " failed" : "",
380 s
&USABLE_DISK
? " usable" : "");
381 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
382 sz
= __le32_to_cpu(disk
->total_blocks
) -
383 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
384 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
385 human_size(sz
* 512));
388 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
390 struct intel_super
*super
= st
->sb
;
391 struct imsm_super
*mpb
= super
->mpb
;
392 char str
[MAX_SIGNATURE_LENGTH
];
396 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
397 printf(" Magic : %s\n", str
);
398 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
399 printf(" Version : %s\n", get_imsm_version(mpb
));
400 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
401 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
402 sum
= __le32_to_cpu(mpb
->check_sum
);
403 printf(" Checksum : %08x %s\n", sum
,
404 gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
405 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
406 printf(" Disks : %d\n", mpb
->num_disks
);
407 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
408 print_imsm_disk(mpb
, super
->disks
->index
);
409 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
410 print_imsm_dev(get_imsm_dev(mpb
, i
), super
->disks
->index
);
411 for (i
= 0; i
< mpb
->num_disks
; i
++) {
412 if (i
== super
->disks
->index
)
414 print_imsm_disk(mpb
, i
);
418 static void brief_examine_super_imsm(struct supertype
*st
)
420 struct intel_super
*super
= st
->sb
;
421 struct imsm_super
*mpb
= super
->mpb
;
423 printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
424 __le32_to_cpu(mpb
->family_num
));
427 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
429 printf("%s\n", __FUNCTION__
);
432 static void brief_detail_super_imsm(struct supertype
*st
)
434 printf("%s\n", __FUNCTION__
);
438 static int match_home_imsm(struct supertype
*st
, char *homehost
)
440 printf("%s\n", __FUNCTION__
);
445 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
447 printf("%s\n", __FUNCTION__
);
451 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
453 __u8
*v
= get_imsm_version(mpb
);
454 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
455 char major
[] = { 0, 0, 0 };
456 char minor
[] = { 0 ,0, 0 };
457 char patch
[] = { 0, 0, 0 };
458 char *ver_parse
[] = { major
, minor
, patch
};
462 while (*v
!= '\0' && v
< end
) {
463 if (*v
!= '.' && j
< 2)
464 ver_parse
[i
][j
++] = *v
;
472 *m
= strtol(minor
, NULL
, 0);
473 *p
= strtol(patch
, NULL
, 0);
476 static int imsm_level_to_layout(int level
)
484 return ALGORITHM_LEFT_SYMMETRIC
;
486 return 0x102; //FIXME is this correct?
491 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
493 struct intel_super
*super
= st
->sb
;
494 struct imsm_super
*mpb
= super
->mpb
;
495 struct imsm_disk
*disk
;
498 info
->array
.major_version
= 2000;
499 get_imsm_numerical_version(mpb
, &info
->array
.minor_version
,
500 &info
->array
.patch_version
);
501 info
->array
.raid_disks
= mpb
->num_disks
;
502 info
->array
.level
= LEVEL_CONTAINER
;
503 info
->array
.layout
= 0;
504 info
->array
.md_minor
= -1;
505 info
->array
.ctime
= 0; /* N/A for imsm */
506 info
->array
.utime
= 0;
507 info
->array
.chunk_size
= 0;
509 info
->disk
.major
= 0;
510 info
->disk
.minor
= 0;
511 info
->disk
.raid_disk
= -1;
512 info
->reshape_active
= 0;
513 strcpy(info
->text_version
, "imsm");
514 info
->disk
.number
= -1;
515 info
->disk
.state
= 0;
518 info
->disk
.number
= super
->disks
->index
;
519 info
->disk
.raid_disk
= super
->disks
->index
;
520 disk
= get_imsm_disk(mpb
, super
->disks
->index
);
521 s
= __le32_to_cpu(disk
->status
);
522 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
523 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
524 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
528 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
530 struct intel_super
*super
= st
->sb
;
531 struct imsm_super
*mpb
= super
->mpb
;
532 struct imsm_dev
*dev
= get_imsm_dev(mpb
, info
->container_member
);
533 struct imsm_map
*map
= &dev
->vol
.map
[0];
535 info
->array
.major_version
= 2000;
536 get_imsm_numerical_version(mpb
, &info
->array
.minor_version
,
537 &info
->array
.patch_version
);
538 info
->array
.raid_disks
= map
->num_members
;
539 info
->array
.level
= get_imsm_raid_level(map
);
540 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
541 info
->array
.md_minor
= -1;
542 info
->array
.ctime
= 0;
543 info
->array
.utime
= 0;
544 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
546 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
547 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
549 info
->disk
.major
= 0;
550 info
->disk
.minor
= 0;
552 sprintf(info
->text_version
, "/%s/%d",
553 devnum2devname(st
->container_dev
),
554 info
->container_member
);
557 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
558 char *update
, char *devname
, int verbose
,
559 int uuid_set
, char *homehost
)
563 /* For 'assemble' and 'force' we need to return non-zero if any
564 * change was made. For others, the return value is ignored.
565 * Update options are:
566 * force-one : This device looks a bit old but needs to be included,
567 * update age info appropriately.
568 * assemble: clear any 'faulty' flag to allow this device to
570 * force-array: Array is degraded but being forced, mark it clean
571 * if that will be needed to assemble it.
573 * newdev: not used ????
574 * grow: Array has gained a new device - this is currently for
576 * resync: mark as dirty so a resync will happen.
577 * name: update the name - preserving the homehost
579 * Following are not relevant for this imsm:
580 * sparc2.2 : update from old dodgey metadata
581 * super-minor: change the preferred_minor number
582 * summaries: update redundant counters.
583 * uuid: Change the uuid of the array to match watch is given
584 * homehost: update the recorded homehost
585 * _reshape_progress: record new reshape_progress position.
588 //struct intel_super *super = st->sb;
589 //struct imsm_super *mpb = super->mpb;
591 if (strcmp(update
, "grow") == 0) {
593 if (strcmp(update
, "resync") == 0) {
594 /* dev->vol.dirty = 1; */
597 /* IMSM has no concept of UUID or homehost */
602 static size_t disks_to_mpb_size(int disks
)
606 size
= sizeof(struct imsm_super
);
607 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
608 size
+= 2 * sizeof(struct imsm_dev
);
609 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
610 size
+= (4 - 2) * sizeof(struct imsm_map
);
611 /* 4 possible disk_ord_tbl's */
612 size
+= 4 * (disks
- 1) * sizeof(__u32
);
617 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
619 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
622 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
625 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
629 * 0 same, or first was empty, and second was copied
630 * 1 second had wrong number
634 struct intel_super
*first
= st
->sb
;
635 struct intel_super
*sec
= tst
->sb
;
643 if (memcmp(first
->mpb
->sig
, sec
->mpb
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
645 if (first
->mpb
->family_num
!= sec
->mpb
->family_num
)
647 if (first
->mpb
->mpb_size
!= sec
->mpb
->mpb_size
)
649 if (first
->mpb
->check_sum
!= sec
->mpb
->check_sum
)
655 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
657 static int imsm_read_serial(int fd
, char *devname
,
658 __u8 serial
[MAX_RAID_SERIAL_LEN
])
660 unsigned char scsi_serial
[255];
666 memset(scsi_serial
, 0, sizeof(scsi_serial
));
668 sg_fd
= sysfs_disk_to_sg(fd
);
672 Name
": Failed to open sg interface for %s: %s\n",
673 devname
, strerror(errno
));
677 rv
= scsi_get_serial(sg_fd
, scsi_serial
, sizeof(scsi_serial
));
683 Name
": Failed to retrieve serial for %s\n",
688 rsp_len
= scsi_serial
[3];
689 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
690 if (!isspace(scsi_serial
[4 + i
]))
691 serial
[cnt
++] = scsi_serial
[4 + i
];
692 if (cnt
== MAX_RAID_SERIAL_LEN
)
696 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
702 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
704 struct imsm_super
*mpb
= super
->mpb
;
707 struct imsm_disk
*disk
;
711 dl
= malloc(sizeof(*dl
));
715 Name
": failed to allocate disk buffer for %s\n",
719 memset(dl
, 0, sizeof(*dl
));
722 dl
->major
= major(stb
.st_rdev
);
723 dl
->minor
= minor(stb
.st_rdev
);
724 dl
->next
= super
->disks
;
725 dl
->fd
= keep_fd
? fd
: -1;
726 dl
->devname
= devname
? strdup(devname
) : NULL
;
729 rv
= imsm_read_serial(fd
, devname
, dl
->serial
);
734 /* look up this disk's index */
735 for (i
= 0; i
< mpb
->num_disks
; i
++) {
736 disk
= get_imsm_disk(mpb
, i
);
738 if (memcmp(disk
->serial
, dl
->serial
, MAX_RAID_SERIAL_LEN
) == 0)
742 if (i
> mpb
->num_disks
)
750 /* load_imsm_mpb - read matrix metadata
751 * allocates super->mpb to be freed by free_super
753 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
755 unsigned long long dsize
;
756 size_t len
, mpb_size
;
757 unsigned long long sectors
;
759 struct imsm_super anchor
;
762 memset(super
, 0, sizeof(*super
));
763 get_dev_size(fd
, NULL
, &dsize
);
765 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
768 Name
": Cannot seek to anchor block on %s: %s\n",
769 devname
, strerror(errno
));
773 len
= sizeof(anchor
);
774 if (read(fd
, &anchor
, len
) != len
) {
777 Name
": Cannot read anchor block on %s: %s\n",
778 devname
, strerror(errno
));
782 if (strncmp((char *) anchor
.sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
785 Name
": no IMSM anchor on %s\n", devname
);
789 mpb_size
= __le32_to_cpu(anchor
.mpb_size
);
790 super
->mpb
= malloc(mpb_size
< 512 ? 512 : mpb_size
);
794 Name
": unable to allocate %zu byte mpb buffer\n",
798 memcpy(super
->buf
, &anchor
, sizeof(anchor
));
800 /* read the rest of the first block */
801 len
= 512 - sizeof(anchor
);
802 if (read(fd
, super
->buf
+ sizeof(anchor
), len
) != len
) {
805 Name
": Cannot read anchor remainder on %s: %s\n",
806 devname
, strerror(errno
));
810 sectors
= mpb_sectors(&anchor
) - 1;
812 return load_imsm_disk(fd
, super
, devname
, 0);
814 /* read the extended mpb */
815 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
818 Name
": Cannot seek to extended mpb on %s: %s\n",
819 devname
, strerror(errno
));
823 len
= mpb_size
- 512;
824 if (read(fd
, super
->buf
+ 512, len
) != len
) {
827 Name
": Cannot read extended mpb on %s: %s\n",
828 devname
, strerror(errno
));
832 check_sum
= gen_imsm_checksum(super
->mpb
);
833 if (check_sum
!= __le32_to_cpu(super
->mpb
->check_sum
)) {
836 Name
": IMSM checksum %x != %x on %s\n",
837 check_sum
, __le32_to_cpu(super
->mpb
->check_sum
),
842 return load_imsm_disk(fd
, super
, devname
, 0);
845 struct superswitch super_imsm_container
;
847 static void free_imsm_disks(struct intel_super
*super
)
849 while (super
->disks
) {
850 struct dl
*d
= super
->disks
;
852 super
->disks
= d
->next
;
861 static void free_imsm(struct intel_super
*super
)
865 free_imsm_disks(super
);
870 static void free_super_imsm(struct supertype
*st
)
872 struct intel_super
*super
= st
->sb
;
881 static struct intel_super
*alloc_super(int creating_imsm
)
883 struct intel_super
*super
= malloc(sizeof(*super
));
886 memset(super
, 0, sizeof(*super
));
887 super
->creating_imsm
= creating_imsm
;
888 super
->creating_dev
= -1;
895 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
896 char *devname
, int keep_fd
)
899 struct intel_super
*super
;
900 struct mdinfo
*sd
, *best
= NULL
;
907 /* check if this disk is a member of an active array */
908 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
912 if (sra
->array
.major_version
!= -1 ||
913 sra
->array
.minor_version
!= -2 ||
914 strcmp(sra
->text_version
, "imsm") != 0)
917 super
= alloc_super(0);
921 /* find the most up to date disk in this array */
922 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
923 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
924 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
929 rv
= load_imsm_mpb(dfd
, super
, NULL
);
933 gen
= __le32_to_cpu(super
->mpb
->generation_num
);
934 if (!best
|| gen
> bestgen
) {
949 /* load the most up to date anchor */
950 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
951 dfd
= dev_open(nm
, O_RDONLY
);
956 rv
= load_imsm_mpb(dfd
, super
, NULL
);
963 /* reset the disk list */
964 free_imsm_disks(super
);
966 /* populate disk list */
967 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
968 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
969 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
974 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
980 if (st
->ss
== NULL
) {
981 st
->ss
= &super_imsm_container
;
982 st
->minor_version
= 0;
983 st
->max_devs
= IMSM_MAX_DEVICES
;
984 st
->container_dev
= fd2devnum(fd
);
991 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
993 struct intel_super
*super
;
997 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1001 super
= alloc_super(0);
1004 Name
": malloc of %zu failed.\n",
1009 rv
= load_imsm_mpb(fd
, super
, devname
);
1014 Name
": Failed to load all information "
1015 "sections on %s\n", devname
);
1021 if (st
->ss
== NULL
) {
1022 st
->ss
= &super_imsm
;
1023 st
->minor_version
= 0;
1024 st
->max_devs
= IMSM_MAX_DEVICES
;
1030 static int init_zero_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1031 unsigned long long size
, char *name
,
1032 char *homehost
, int *uuid
)
1038 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1039 unsigned long long size
, char *name
,
1040 char *homehost
, int *uuid
)
1042 /* This is primarily called by Create when creating a new array.
1043 * We will then get add_to_super called for each component, and then
1044 * write_init_super called to write it out to each device.
1045 * For IMSM, Create can create on fresh devices or on a pre-existing
1047 * To create on a pre-existing array a different method will be called.
1048 * This one is just for fresh drives.
1050 struct intel_super
*super
;
1051 struct imsm_super
*mpb
;
1054 super
= alloc_super(1);
1057 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1058 mpb
= malloc(mpb_size
);
1063 memset(mpb
, 0, mpb_size
);
1065 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1066 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1067 strlen(MPB_VERSION_RAID5
));
1068 mpb
->mpb_size
= mpb_size
;
1075 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1076 unsigned long long size
, char *name
,
1077 char *homehost
, int *uuid
)
1079 /* We are creating a volume inside a pre-existing container.
1080 * so st->sb is already set.
1082 struct intel_super
*super
= st
->sb
;
1083 struct imsm_super
*mpb
= super
->mpb
;
1084 struct imsm_dev
*dev
;
1085 struct imsm_vol
*vol
;
1086 struct imsm_map
*map
;
1087 int idx
= mpb
->num_raid_devs
;
1089 unsigned long long array_blocks
;
1090 unsigned long long sz
;
1093 if (mpb
->num_raid_devs
>= 2) {
1094 fprintf(stderr
, Name
": This imsm-container already has the "
1095 "maximum of 2 volumes\n");
1099 super
->creating_dev
= idx
;
1100 mpb
->num_raid_devs
++;
1101 dev
= get_imsm_dev(mpb
, idx
);
1102 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1103 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1104 info
->layout
, info
->chunk_size
,
1106 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1107 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1108 dev
->status
= __cpu_to_le32(0);
1109 dev
->reserved_blocks
= __cpu_to_le32(0);
1111 vol
->migr_state
= 0;
1114 for (i
= 0; i
< idx
; i
++) {
1115 struct imsm_dev
*prev
= get_imsm_dev(mpb
, i
);
1116 struct imsm_map
*pmap
= &prev
->vol
.map
[0];
1118 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1119 offset
+= IMSM_RESERVED_SECTORS
;
1122 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1123 sz
= info
->size
* 2;
1124 map
->blocks_per_member
= __cpu_to_le32(sz
);
1125 map
->blocks_per_strip
= __cpu_to_le16(info
->chunk_size
>> 9);
1126 map
->num_data_stripes
= __cpu_to_le32(sz
/ (info
->chunk_size
>> 9));
1127 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1128 IMSM_T_STATE_NORMAL
;
1129 if (info
->level
== 10)
1130 map
->raid_level
= 1;
1132 map
->raid_level
= info
->level
;
1133 map
->num_members
= info
->raid_disks
;
1134 for (i
= 0; i
< map
->num_members
; i
++) {
1135 /* initialized in add_to_super */
1136 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1142 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1143 int fd
, char *devname
)
1145 struct intel_super
*super
= st
->sb
;
1146 struct imsm_super
*mpb
= super
->mpb
;
1147 struct imsm_disk
*disk
;
1149 unsigned long long size
;
1155 dd
= malloc(sizeof(*dd
));
1158 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1161 memset(dd
, 0, sizeof(*dd
));
1162 dd
->major
= major(stb
.st_rdev
);
1163 dd
->minor
= minor(stb
.st_rdev
);
1164 dd
->index
= dk
->number
;
1165 dd
->devname
= devname
? strdup(devname
) : NULL
;
1166 dd
->next
= super
->disks
;
1168 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1171 Name
": failed to retrieve scsi serial "
1172 "using \'%s\' instead\n", devname
);
1173 strcpy((char *) dd
->serial
, devname
);
1176 if (mpb
->num_disks
<= dk
->number
)
1177 mpb
->num_disks
= dk
->number
+ 1;
1179 disk
= get_imsm_disk(mpb
, dk
->number
);
1180 get_dev_size(fd
, NULL
, &size
);
1182 status
= USABLE_DISK
| SPARE_DISK
;
1183 strcpy((char *) disk
->serial
, (char *) dd
->serial
);
1184 disk
->total_blocks
= __cpu_to_le32(size
);
1185 disk
->status
= __cpu_to_le32(status
);
1186 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1187 disk
->scsi_id
= __cpu_to_le32(id
);
1189 disk
->scsi_id
= __cpu_to_le32(0);
1191 /* update the family number if we are creating a container */
1192 if (super
->creating_imsm
)
1193 mpb
->family_num
= __cpu_to_le32(gen_imsm_checksum(mpb
));
1198 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1199 int fd
, char *devname
)
1201 struct intel_super
*super
= st
->sb
;
1202 struct imsm_super
*mpb
= super
->mpb
;
1204 struct imsm_dev
*dev
;
1205 struct imsm_map
*map
;
1206 struct imsm_disk
*disk
;
1209 if (super
->creating_dev
== -1) {
1210 fprintf(stderr
, Name
": no active raid device\n");
1214 dev
= get_imsm_dev(mpb
, super
->creating_dev
);
1215 map
= &dev
->vol
.map
[0];
1217 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1218 if (dl
->major
== dk
->major
&&
1219 dl
->minor
== dk
->minor
)
1221 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1224 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1226 disk
= get_imsm_disk(mpb
, dl
->index
);
1227 status
= CONFIGURED_DISK
| USABLE_DISK
;
1228 disk
->status
= __cpu_to_le32(status
);
1231 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1233 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1235 struct imsm_super
*mpb
= super
->mpb
;
1240 /* 'generation' is incremented everytime the metadata is written */
1241 generation
= __le32_to_cpu(mpb
->generation_num
);
1243 mpb
->generation_num
= __cpu_to_le32(generation
);
1245 /* recalculate checksum */
1246 sum
= gen_imsm_checksum(mpb
);
1247 mpb
->check_sum
= __cpu_to_le32(sum
);
1249 for (d
= super
->disks
; d
; d
= d
->next
) {
1250 if (store_imsm_mpb(d
->fd
, super
)) {
1251 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1252 __func__
, d
->major
, d
->minor
, strerror(errno
));
1264 static int write_init_super_imsm(struct supertype
*st
)
1266 return write_super_imsm(st
->sb
, 1);
1269 static int store_zero_imsm(struct supertype
*st
, int fd
)
1271 unsigned long long dsize
;
1274 get_dev_size(fd
, NULL
, &dsize
);
1276 /* first block is stored on second to last sector of the disk */
1277 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1280 memset(buf
, 0, sizeof(buf
));
1281 if (write(fd
, buf
, sizeof(buf
)) != sizeof(buf
))
1287 static void getinfo_super_n_imsm_container(struct supertype
*st
, struct mdinfo
*info
)
1289 /* just need offset and size...
1292 struct intel_super
*super
= st
->sb
;
1293 struct imsm_super
*mpb
= super
->mpb
;
1294 struct imsm_disk
*disk
= get_imsm_disk(mpb
, info
->disk
.number
);
1296 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) -
1297 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
1298 info
->component_size
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1301 static void getinfo_super_n_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
1303 /* Find the particular details for info->disk.raid_disk.
1304 * This includes data_offset, component_size,
1306 struct intel_super
*super
= st
->sb
;
1307 struct imsm_super
*mpb
= super
->mpb
;
1308 struct imsm_dev
*dev
= get_imsm_dev(mpb
, super
->creating_dev
);
1309 struct imsm_map
*map
= &dev
->vol
.map
[0];
1311 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1312 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1315 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1316 int raiddisks
, int chunk
, unsigned long long size
,
1317 char *dev
, unsigned long long *freesize
)
1322 /* if given unused devices create a container
1323 * if given given devices in a container create a member volume
1325 if (level
== LEVEL_CONTAINER
) {
1326 st
->ss
= &super_imsm_container
;
1328 /* validate the container, dev == NULL */
1329 int rv
= st
->ss
->validate_geometry(st
, level
, layout
,
1336 return st
->ss
->validate_geometry(st
, level
, layout
, raiddisks
,
1337 chunk
, size
, dev
, freesize
);
1341 /* creating in a given container */
1342 st
->ss
= &super_imsm_volume
;
1344 int rv
= st
->ss
->validate_geometry(st
, level
, layout
,
1351 return st
->ss
->validate_geometry(st
, level
, layout
, raiddisks
,
1352 chunk
, size
, dev
, freesize
);
1355 /* limit creation to the following levels */
1367 /* This device needs to be a device in an 'imsm' container */
1368 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1371 Name
": Cannot create this array on device %s\n",
1376 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
1377 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1378 dev
, strerror(errno
));
1381 /* Well, it is in use by someone, maybe an 'imsm' container. */
1382 cfd
= open_container(fd
);
1385 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
1389 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
1391 if (sra
&& sra
->array
.major_version
== -1 &&
1392 strcmp(sra
->text_version
, "imsm") == 0) {
1393 /* This is a member of a imsm container. Load the container
1394 * and try to create a volume
1396 struct intel_super
*super
;
1397 st
->ss
= &super_imsm_volume
;
1398 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
1400 st
->container_dev
= fd2devnum(cfd
);
1402 return st
->ss
->validate_geometry(st
, level
, layout
,
1403 raiddisks
, chunk
, size
,
1407 } else /* may belong to another container */
1413 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1414 int layout
, int raiddisks
, int chunk
,
1415 unsigned long long size
, char *dev
,
1416 unsigned long long *freesize
)
1419 unsigned long long ldsize
;
1421 if (level
!= LEVEL_CONTAINER
)
1426 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1428 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1429 dev
, strerror(errno
));
1432 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1438 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1443 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1444 * FIX ME add ahci details
1446 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1447 int layout
, int raiddisks
, int chunk
,
1448 unsigned long long size
, char *dev
,
1449 unsigned long long *freesize
)
1452 struct intel_super
*super
= st
->sb
;
1454 unsigned long long pos
= 0;
1455 unsigned long long maxsize
;
1459 if (level
== LEVEL_CONTAINER
)
1462 if (level
== 1 && raiddisks
> 2) {
1463 fprintf(stderr
, Name
": imsm does not support more than 2 "
1464 "in a raid1 configuration\n");
1468 /* We must have the container info already read in. */
1473 /* General test: make sure there is space for
1474 * 'raiddisks' device extents of size 'size'.
1476 unsigned long long minsize
= size
*2 /* convert to blocks */;
1479 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1480 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1484 e
= get_extents(super
, dl
);
1487 unsigned long long esize
;
1488 esize
= e
[i
].start
- pos
;
1489 if (esize
>= minsize
)
1491 pos
= e
[i
].start
+ e
[i
].size
;
1493 } while (e
[i
-1].size
);
1498 if (dcnt
< raiddisks
) {
1499 fprintf(stderr
, Name
": Not enough devices with space "
1500 "for this array (%d < %d)\n",
1506 /* This device must be a member of the set */
1507 if (stat(dev
, &stb
) < 0)
1509 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1511 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1512 if (dl
->major
== major(stb
.st_rdev
) &&
1513 dl
->minor
== minor(stb
.st_rdev
))
1517 fprintf(stderr
, Name
": %s is not in the same imsm set\n",
1521 e
= get_extents(super
, dl
);
1525 unsigned long long esize
;
1526 esize
= e
[i
].start
- pos
;
1527 if (esize
>= maxsize
)
1529 pos
= e
[i
].start
+ e
[i
].size
;
1531 } while (e
[i
-1].size
);
1532 *freesize
= maxsize
;
1537 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
1539 /* Given a container loaded by load_super_imsm_all,
1540 * extract information about all the arrays into
1543 * For each imsm_dev create an mdinfo, fill it in,
1544 * then look for matching devices in super->disks
1545 * and create appropriate device mdinfo.
1547 struct intel_super
*super
= st
->sb
;
1548 struct imsm_super
*mpb
= super
->mpb
;
1549 struct mdinfo
*rest
= NULL
;
1552 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1553 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
1554 struct imsm_vol
*vol
= &dev
->vol
;
1555 struct imsm_map
*map
= vol
->map
;
1556 struct mdinfo
*this;
1560 this = malloc(sizeof(*this));
1561 memset(this, 0, sizeof(*this));
1565 this->array
.major_version
= 2000;
1566 get_imsm_numerical_version(mpb
, &this->array
.minor_version
,
1567 &this->array
.patch_version
);
1568 this->array
.level
= get_imsm_raid_level(map
);
1569 this->array
.raid_disks
= map
->num_members
;
1570 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
1571 this->array
.md_minor
= -1;
1572 this->array
.ctime
= 0;
1573 this->array
.utime
= 0;
1574 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1575 this->array
.state
= !vol
->dirty
;
1576 this->container_member
= i
;
1577 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1578 this->resync_start
= 0;
1580 this->resync_start
= ~0ULL;
1582 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1583 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
1585 sprintf(this->text_version
, "/%s/%d",
1586 devnum2devname(st
->container_dev
),
1587 this->container_member
);
1589 memset(this->uuid
, 0, sizeof(this->uuid
));
1591 sz
= __le32_to_cpu(dev
->size_high
);
1593 sz
+= __le32_to_cpu(dev
->size_low
);
1594 this->component_size
= sz
;
1595 this->array
.size
= this->component_size
/ 2;
1597 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
1598 struct imsm_disk
*disk
;
1599 struct mdinfo
*info_d
;
1604 idx
= __le32_to_cpu(map
->disk_ord_tbl
[slot
] & ~(0xff << 24));
1605 for (d
= super
->disks
; d
; d
= d
->next
)
1606 if (d
->index
== idx
)
1610 break; /* shouldn't this be continue ?? */
1612 info_d
= malloc(sizeof(*info_d
));
1614 break; /* ditto ?? */
1615 memset(info_d
, 0, sizeof(*info_d
));
1616 info_d
->next
= this->devs
;
1617 this->devs
= info_d
;
1619 disk
= get_imsm_disk(mpb
, idx
);
1620 s
= __le32_to_cpu(disk
->status
);
1622 info_d
->disk
.number
= d
->index
;
1623 info_d
->disk
.major
= d
->major
;
1624 info_d
->disk
.minor
= d
->minor
;
1625 info_d
->disk
.raid_disk
= slot
;
1626 info_d
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
1627 info_d
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
1628 info_d
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
1630 this->array
.working_disks
++;
1632 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
1633 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1634 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1636 strcpy(info_d
->name
, d
->devname
);
1644 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
1647 dprintf("imsm: open_new %s\n", inst
);
1648 a
->info
.container_member
= atoi(inst
);
1652 static __u8
imsm_check_degraded(struct imsm_super
*mpb
, int n
, int failed
)
1654 struct imsm_dev
*dev
= get_imsm_dev(mpb
, n
);
1655 struct imsm_map
*map
= dev
->vol
.map
;
1658 return map
->map_state
;
1660 switch (get_imsm_raid_level(map
)) {
1662 return IMSM_T_STATE_FAILED
;
1665 if (failed
< map
->num_members
)
1666 return IMSM_T_STATE_DEGRADED
;
1668 return IMSM_T_STATE_FAILED
;
1673 * check to see if any mirrors have failed,
1674 * otherwise we are degraded
1676 int device_per_mirror
= 2; /* FIXME is this always the case?
1677 * and are they always adjacent?
1682 for (i
= 0; i
< map
->num_members
; i
++) {
1683 int idx
= get_imsm_disk_idx(map
, i
);
1684 struct imsm_disk
*disk
= get_imsm_disk(mpb
, idx
);
1686 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1689 if (failed
>= device_per_mirror
)
1690 return IMSM_T_STATE_FAILED
;
1692 /* reset 'failed' for next mirror set */
1693 if (!((i
+ 1) % device_per_mirror
))
1697 return IMSM_T_STATE_DEGRADED
;
1701 return IMSM_T_STATE_DEGRADED
;
1703 return IMSM_T_STATE_FAILED
;
1709 return map
->map_state
;
1712 static int imsm_count_failed(struct imsm_super
*mpb
, struct imsm_map
*map
)
1716 struct imsm_disk
*disk
;
1718 for (i
= 0; i
< map
->num_members
; i
++) {
1719 int idx
= get_imsm_disk_idx(map
, i
);
1721 disk
= get_imsm_disk(mpb
, idx
);
1722 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1729 static void imsm_set_array_state(struct active_array
*a
, int consistent
)
1731 int inst
= a
->info
.container_member
;
1732 struct intel_super
*super
= a
->container
->sb
;
1733 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1734 struct imsm_map
*map
= &dev
->vol
.map
[0];
1735 int dirty
= !consistent
;
1739 if (a
->resync_start
== ~0ULL) {
1740 failed
= imsm_count_failed(super
->mpb
, map
);
1741 map_state
= imsm_check_degraded(super
->mpb
, inst
, failed
);
1743 map_state
= IMSM_T_STATE_NORMAL
;
1744 if (map
->map_state
!= map_state
) {
1745 dprintf("imsm: map_state %d: %d\n",
1747 map
->map_state
= map_state
;
1748 super
->updates_pending
++;
1752 if (dev
->vol
.dirty
!= dirty
) {
1753 dprintf("imsm: mark '%s' (%llu)\n",
1754 dirty
?"dirty":"clean", a
->resync_start
);
1756 dev
->vol
.dirty
= dirty
;
1757 super
->updates_pending
++;
1761 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
1763 int inst
= a
->info
.container_member
;
1764 struct intel_super
*super
= a
->container
->sb
;
1765 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1766 struct imsm_map
*map
= dev
->vol
.map
;
1767 struct imsm_disk
*disk
;
1770 int new_failure
= 0;
1772 if (n
> map
->num_members
)
1773 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
1774 n
, map
->num_members
- 1);
1779 dprintf("imsm: set_disk %d:%x\n", n
, state
);
1781 disk
= get_imsm_disk(super
->mpb
, get_imsm_disk_idx(map
, n
));
1783 /* check if we have seen this failure before */
1784 status
= __le32_to_cpu(disk
->status
);
1785 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
1786 status
|= FAILED_DISK
;
1787 disk
->status
= __cpu_to_le32(status
);
1792 * the number of failures have changed, count up 'failed' to determine
1793 * degraded / failed status
1795 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
1796 failed
= imsm_count_failed(super
->mpb
, map
);
1799 map
->map_state
= imsm_check_degraded(super
->mpb
, inst
, failed
);
1802 super
->updates_pending
++;
1805 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
1807 struct imsm_super
*mpb
= super
->mpb
;
1808 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
1809 unsigned long long dsize
;
1810 unsigned long long sectors
;
1812 get_dev_size(fd
, NULL
, &dsize
);
1814 if (mpb_size
> 512) {
1815 /* -1 to account for anchor */
1816 sectors
= mpb_sectors(mpb
) - 1;
1818 /* write the extended mpb to the sectors preceeding the anchor */
1819 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
1822 if (write(fd
, super
->buf
+ 512, mpb_size
- 512) != mpb_size
- 512)
1826 /* first block is stored on second to last sector of the disk */
1827 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1830 if (write(fd
, super
->buf
, 512) != 512)
1838 static void imsm_sync_metadata(struct supertype
*container
)
1840 struct intel_super
*super
= container
->sb
;
1842 if (!super
->updates_pending
)
1845 write_super_imsm(super
, 0);
1847 super
->updates_pending
= 0;
1850 struct superswitch super_imsm
= {
1852 .examine_super
= examine_super_imsm
,
1853 .brief_examine_super
= brief_examine_super_imsm
,
1854 .detail_super
= detail_super_imsm
,
1855 .brief_detail_super
= brief_detail_super_imsm
,
1857 .match_home
= match_home_imsm
,
1858 .uuid_from_super
= uuid_from_super_imsm
,
1859 .getinfo_super
= getinfo_super_imsm
,
1860 .update_super
= update_super_imsm
,
1862 .avail_size
= avail_size_imsm
,
1864 .compare_super
= compare_super_imsm
,
1866 .load_super
= load_super_imsm
,
1867 .init_super
= init_zero_imsm
,
1868 .store_super
= store_zero_imsm
,
1869 .free_super
= free_super_imsm
,
1870 .match_metadata_desc
= match_metadata_desc_imsm
,
1871 .getinfo_super_n
= getinfo_super_n_imsm_container
,
1873 .validate_geometry
= validate_geometry_imsm
,
1879 .open_new
= imsm_open_new
,
1880 .load_super
= load_super_imsm
,
1881 .set_array_state
= imsm_set_array_state
,
1882 .set_disk
= imsm_set_disk
,
1883 .sync_metadata
= imsm_sync_metadata
,
1886 /* super_imsm_container is set by validate_geometry_imsm when given a
1887 * device that is not part of any array
1889 struct superswitch super_imsm_container
= {
1891 .validate_geometry
= validate_geometry_imsm_container
,
1892 .init_super
= init_super_imsm
,
1893 .add_to_super
= add_to_super_imsm
,
1894 .write_init_super
= write_init_super_imsm
,
1895 .getinfo_super
= getinfo_super_imsm
,
1896 .getinfo_super_n
= getinfo_super_n_imsm_container
,
1897 .load_super
= load_super_imsm
,
1900 .examine_super
= examine_super_imsm
,
1901 .brief_examine_super
= brief_examine_super_imsm
,
1902 .detail_super
= detail_super_imsm
,
1903 .brief_detail_super
= brief_detail_super_imsm
,
1906 .free_super
= free_super_imsm
,
1908 .container_content
= container_content_imsm
,
1915 struct superswitch super_imsm_volume
= {
1916 .update_super
= update_super_imsm
,
1917 .init_super
= init_super_imsm_volume
,
1918 .add_to_super
= add_to_super_imsm_volume
,
1919 .getinfo_super
= getinfo_super_imsm_volume
,
1920 .getinfo_super_n
= getinfo_super_n_imsm_volume
,
1921 .write_init_super
= write_init_super_imsm
,
1923 .load_super
= load_super_imsm
,
1924 .free_super
= free_super_imsm
,
1925 .match_metadata_desc
= match_metadata_desc_imsm_volume
,
1928 .validate_geometry
= validate_geometry_imsm_volume
,