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 static struct superswitch super_imsm_volume
;
129 /* internal representation of IMSM metadata */
132 struct imsm_super
*mpb
;
135 int updates_pending
; /* count of pending updates for mdmon */
136 int creating_imsm
; /* flag to indicate container creation */
137 int creating_dev
; /* index of raid device undergoing creation */
141 __u8 serial
[MAX_RAID_SERIAL_LEN
];
149 unsigned long long start
, size
;
152 static struct supertype
*match_metadata_desc_imsm(char *arg
)
154 struct supertype
*st
;
156 if (strcmp(arg
, "imsm") != 0 &&
157 strcmp(arg
, "default") != 0
161 st
= malloc(sizeof(*st
));
162 memset(st
, 0, sizeof(*st
));
163 st
->ss
= &super_imsm
;
164 st
->max_devs
= IMSM_MAX_DEVICES
;
165 st
->minor_version
= 0;
170 static struct supertype
*match_metadata_desc_imsm_volume(char *arg
)
172 struct supertype
*st
;
174 if (strcmp(arg
, "imsm/volume") != 0 &&
175 strcmp(arg
, "raid") != 0 &&
176 strcmp(arg
, "default") != 0
180 st
= malloc(sizeof(*st
));
181 memset(st
, 0, sizeof(*st
));
182 st
->ss
= &super_imsm_volume
;
183 st
->max_devs
= IMSM_MAX_DEVICES
;
184 st
->minor_version
= 0;
189 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
191 return &mpb
->sig
[MPB_SIG_LEN
];
194 static struct imsm_disk
*get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
196 if (index
> mpb
->num_disks
- 1)
198 return &mpb
->disk
[index
];
201 static __u32
gen_imsm_checksum(struct imsm_super
*mpb
)
203 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
204 __u32
*p
= (__u32
*) mpb
;
208 sum
+= __le32_to_cpu(*p
++);
210 return sum
- __le32_to_cpu(mpb
->check_sum
);
213 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
)
215 size_t size
= sizeof(*dev
);
217 /* each map has disk_ord_tbl[num_members - 1] additional space */
218 size
+= sizeof(__u32
) * (dev
->vol
.map
[0].num_members
- 1);
220 /* migrating means an additional map */
221 if (dev
->vol
.migr_state
) {
222 size
+= sizeof(struct imsm_map
);
223 size
+= sizeof(__u32
) * (dev
->vol
.map
[1].num_members
- 1);
229 static struct imsm_dev
*get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
235 if (index
> mpb
->num_raid_devs
- 1)
238 /* devices start after all disks */
239 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
241 for (i
= 0; i
<= index
; i
++)
243 return _mpb
+ offset
;
245 offset
+= sizeof_imsm_dev(_mpb
+ offset
);
250 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
252 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
254 /* top byte is 'special' */
255 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
258 static int get_imsm_raid_level(struct imsm_map
*map
)
260 if (map
->raid_level
== 1) {
261 if (map
->num_members
== 2)
267 return map
->raid_level
;
270 static int cmp_extent(const void *av
, const void *bv
)
272 const struct extent
*a
= av
;
273 const struct extent
*b
= bv
;
274 if (a
->start
< b
->start
)
276 if (a
->start
> b
->start
)
281 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
283 /* find a list of used extents on the given physical device */
284 struct imsm_super
*mpb
= super
->mpb
;
285 struct imsm_disk
*disk
;
286 struct extent
*rv
, *e
;
290 disk
= get_imsm_disk(mpb
, dl
->index
);
294 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
295 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
296 struct imsm_map
*map
= dev
->vol
.map
;
298 for (j
= 0; j
< map
->num_members
; j
++) {
299 __u32 index
= get_imsm_disk_idx(map
, j
);
301 if (index
== dl
->index
)
305 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
310 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
311 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
312 struct imsm_map
*map
= dev
->vol
.map
;
314 for (j
= 0; j
< map
->num_members
; j
++) {
315 __u32 index
= get_imsm_disk_idx(map
, j
);
317 if (index
== dl
->index
) {
318 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
319 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
324 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
326 e
->start
= __le32_to_cpu(disk
->total_blocks
) -
327 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
333 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
337 struct imsm_map
*map
= dev
->vol
.map
;
340 printf("[%s]:\n", dev
->volume
);
341 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
342 printf(" Members : %d\n", map
->num_members
);
343 for (slot
= 0; slot
< map
->num_members
; slot
++)
344 if (index
== get_imsm_disk_idx(map
, slot
))
346 if (slot
< map
->num_members
)
347 printf(" This Slot : %d\n", slot
);
349 printf(" This Slot : ?\n");
350 sz
= __le32_to_cpu(dev
->size_high
);
352 sz
+= __le32_to_cpu(dev
->size_low
);
353 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
354 human_size(sz
* 512));
355 sz
= __le32_to_cpu(map
->blocks_per_member
);
356 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
357 human_size(sz
* 512));
358 printf(" Sector Offset : %u\n",
359 __le32_to_cpu(map
->pba_of_lba0
));
360 printf(" Num Stripes : %u\n",
361 __le32_to_cpu(map
->num_data_stripes
));
362 printf(" Chunk Size : %u KiB\n",
363 __le16_to_cpu(map
->blocks_per_strip
) / 2);
364 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
365 printf(" Migrate State : %s\n", dev
->vol
.migr_state
? "migrating" : "idle");
366 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
367 printf(" Map State : %s\n", map_state_str
[map
->map_state
]);
370 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
372 struct imsm_disk
*disk
= get_imsm_disk(mpb
, index
);
373 char str
[MAX_RAID_SERIAL_LEN
];
378 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
379 printf(" Disk%02d Serial : %s\n", index
, str
);
380 s
= __le32_to_cpu(disk
->status
);
381 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
382 s
&CONFIGURED_DISK
? " active" : "",
383 s
&FAILED_DISK
? " failed" : "",
384 s
&USABLE_DISK
? " usable" : "");
385 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
386 sz
= __le32_to_cpu(disk
->total_blocks
) -
387 (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
* mpb
->num_raid_devs
);
388 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
389 human_size(sz
* 512));
392 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
394 struct intel_super
*super
= st
->sb
;
395 struct imsm_super
*mpb
= super
->mpb
;
396 char str
[MAX_SIGNATURE_LENGTH
];
400 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
401 printf(" Magic : %s\n", str
);
402 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
403 printf(" Version : %s\n", get_imsm_version(mpb
));
404 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
405 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
406 sum
= __le32_to_cpu(mpb
->check_sum
);
407 printf(" Checksum : %08x %s\n", sum
,
408 gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
409 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
410 printf(" Disks : %d\n", mpb
->num_disks
);
411 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
412 print_imsm_disk(mpb
, super
->disks
->index
);
413 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
414 print_imsm_dev(get_imsm_dev(mpb
, i
), super
->disks
->index
);
415 for (i
= 0; i
< mpb
->num_disks
; i
++) {
416 if (i
== super
->disks
->index
)
418 print_imsm_disk(mpb
, i
);
422 static void brief_examine_super_imsm(struct supertype
*st
)
424 struct intel_super
*super
= st
->sb
;
425 struct imsm_super
*mpb
= super
->mpb
;
427 printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
428 __le32_to_cpu(mpb
->family_num
));
431 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
433 printf("%s\n", __FUNCTION__
);
436 static void brief_detail_super_imsm(struct supertype
*st
)
438 printf("%s\n", __FUNCTION__
);
442 static int match_home_imsm(struct supertype
*st
, char *homehost
)
444 printf("%s\n", __FUNCTION__
);
449 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
451 printf("%s\n", __FUNCTION__
);
456 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
458 __u8
*v
= get_imsm_version(mpb
);
459 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
460 char major
[] = { 0, 0, 0 };
461 char minor
[] = { 0 ,0, 0 };
462 char patch
[] = { 0, 0, 0 };
463 char *ver_parse
[] = { major
, minor
, patch
};
467 while (*v
!= '\0' && v
< end
) {
468 if (*v
!= '.' && j
< 2)
469 ver_parse
[i
][j
++] = *v
;
477 *m
= strtol(minor
, NULL
, 0);
478 *p
= strtol(patch
, NULL
, 0);
482 static int imsm_level_to_layout(int level
)
490 return ALGORITHM_LEFT_SYMMETRIC
;
492 return 0x102; //FIXME is this correct?
497 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
499 struct intel_super
*super
= st
->sb
;
500 struct imsm_super
*mpb
= super
->mpb
;
501 struct imsm_disk
*disk
;
502 int sect
= mpb_sectors(mpb
);
505 info
->array
.raid_disks
= mpb
->num_disks
;
506 info
->array
.level
= LEVEL_CONTAINER
;
507 info
->array
.layout
= 0;
508 info
->array
.md_minor
= -1;
509 info
->array
.ctime
= 0; /* N/A for imsm */
510 info
->array
.utime
= 0;
511 info
->array
.chunk_size
= 0;
513 info
->disk
.major
= 0;
514 info
->disk
.minor
= 0;
515 info
->disk
.raid_disk
= -1;
516 info
->reshape_active
= 0;
517 strcpy(info
->text_version
, "imsm");
518 info
->disk
.number
= -1;
519 info
->disk
.state
= 0;
521 info
->data_offset
= __le32_to_cpu(get_imsm_disk(super
->mpb
,
523 ->total_blocks
) - (2 + sect
- 1);
524 info
->component_size
= sect
;
527 info
->disk
.number
= super
->disks
->index
;
528 info
->disk
.raid_disk
= super
->disks
->index
;
529 disk
= get_imsm_disk(mpb
, super
->disks
->index
);
530 s
= __le32_to_cpu(disk
->status
);
531 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
532 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
533 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
537 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
539 struct intel_super
*super
= st
->sb
;
540 struct imsm_super
*mpb
= super
->mpb
;
541 struct imsm_dev
*dev
= get_imsm_dev(mpb
, info
->container_member
);
542 struct imsm_map
*map
= &dev
->vol
.map
[0];
544 info
->array
.raid_disks
= map
->num_members
;
545 info
->array
.level
= get_imsm_raid_level(map
);
546 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
547 info
->array
.md_minor
= -1;
548 info
->array
.ctime
= 0;
549 info
->array
.utime
= 0;
550 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
* 512);
552 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
553 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
555 info
->disk
.major
= 0;
556 info
->disk
.minor
= 0;
558 sprintf(info
->text_version
, "/%s/%d",
559 devnum2devname(st
->container_dev
),
560 info
->container_member
);
563 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
564 char *update
, char *devname
, int verbose
,
565 int uuid_set
, char *homehost
)
569 /* For 'assemble' and 'force' we need to return non-zero if any
570 * change was made. For others, the return value is ignored.
571 * Update options are:
572 * force-one : This device looks a bit old but needs to be included,
573 * update age info appropriately.
574 * assemble: clear any 'faulty' flag to allow this device to
576 * force-array: Array is degraded but being forced, mark it clean
577 * if that will be needed to assemble it.
579 * newdev: not used ????
580 * grow: Array has gained a new device - this is currently for
582 * resync: mark as dirty so a resync will happen.
583 * name: update the name - preserving the homehost
585 * Following are not relevant for this imsm:
586 * sparc2.2 : update from old dodgey metadata
587 * super-minor: change the preferred_minor number
588 * summaries: update redundant counters.
589 * uuid: Change the uuid of the array to match watch is given
590 * homehost: update the recorded homehost
591 * _reshape_progress: record new reshape_progress position.
594 //struct intel_super *super = st->sb;
595 //struct imsm_super *mpb = super->mpb;
597 if (strcmp(update
, "grow") == 0) {
599 if (strcmp(update
, "resync") == 0) {
600 /* dev->vol.dirty = 1; */
603 /* IMSM has no concept of UUID or homehost */
608 static size_t disks_to_mpb_size(int disks
)
612 size
= sizeof(struct imsm_super
);
613 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
614 size
+= 2 * sizeof(struct imsm_dev
);
615 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
616 size
+= (4 - 2) * sizeof(struct imsm_map
);
617 /* 4 possible disk_ord_tbl's */
618 size
+= 4 * (disks
- 1) * sizeof(__u32
);
623 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
625 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
628 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
631 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
635 * 0 same, or first was empty, and second was copied
636 * 1 second had wrong number
640 struct intel_super
*first
= st
->sb
;
641 struct intel_super
*sec
= tst
->sb
;
649 if (memcmp(first
->mpb
->sig
, sec
->mpb
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
651 if (first
->mpb
->family_num
!= sec
->mpb
->family_num
)
653 if (first
->mpb
->mpb_size
!= sec
->mpb
->mpb_size
)
655 if (first
->mpb
->check_sum
!= sec
->mpb
->check_sum
)
661 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
663 static int imsm_read_serial(int fd
, char *devname
,
664 __u8 serial
[MAX_RAID_SERIAL_LEN
])
666 unsigned char scsi_serial
[255];
672 memset(scsi_serial
, 0, sizeof(scsi_serial
));
674 sg_fd
= sysfs_disk_to_sg(fd
);
678 Name
": Failed to open sg interface for %s: %s\n",
679 devname
, strerror(errno
));
683 rv
= scsi_get_serial(sg_fd
, scsi_serial
, sizeof(scsi_serial
));
689 Name
": Failed to retrieve serial for %s\n",
694 rsp_len
= scsi_serial
[3];
695 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
696 if (!isspace(scsi_serial
[4 + i
]))
697 serial
[cnt
++] = scsi_serial
[4 + i
];
698 if (cnt
== MAX_RAID_SERIAL_LEN
)
702 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
708 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
710 struct imsm_super
*mpb
= super
->mpb
;
713 struct imsm_disk
*disk
;
717 dl
= malloc(sizeof(*dl
));
721 Name
": failed to allocate disk buffer for %s\n",
725 memset(dl
, 0, sizeof(*dl
));
728 dl
->major
= major(stb
.st_rdev
);
729 dl
->minor
= minor(stb
.st_rdev
);
730 dl
->next
= super
->disks
;
731 dl
->fd
= keep_fd
? fd
: -1;
732 dl
->devname
= devname
? strdup(devname
) : NULL
;
735 rv
= imsm_read_serial(fd
, devname
, dl
->serial
);
740 /* look up this disk's index */
741 for (i
= 0; i
< mpb
->num_disks
; i
++) {
742 disk
= get_imsm_disk(mpb
, i
);
744 if (memcmp(disk
->serial
, dl
->serial
, MAX_RAID_SERIAL_LEN
) == 0)
748 if (i
> mpb
->num_disks
)
756 /* load_imsm_mpb - read matrix metadata
757 * allocates super->mpb to be freed by free_super
759 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
761 unsigned long long dsize
;
762 size_t len
, mpb_size
;
763 unsigned long long sectors
;
765 struct imsm_super anchor
;
768 memset(super
, 0, sizeof(*super
));
769 get_dev_size(fd
, NULL
, &dsize
);
771 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
774 Name
": Cannot seek to anchor block on %s: %s\n",
775 devname
, strerror(errno
));
779 len
= sizeof(anchor
);
780 if (read(fd
, &anchor
, len
) != len
) {
783 Name
": Cannot read anchor block on %s: %s\n",
784 devname
, strerror(errno
));
788 if (strncmp((char *) anchor
.sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
791 Name
": no IMSM anchor on %s\n", devname
);
795 mpb_size
= __le32_to_cpu(anchor
.mpb_size
);
796 super
->mpb
= malloc(mpb_size
< 512 ? 512 : mpb_size
);
800 Name
": unable to allocate %zu byte mpb buffer\n",
804 memcpy(super
->buf
, &anchor
, sizeof(anchor
));
806 /* read the rest of the first block */
807 len
= 512 - sizeof(anchor
);
808 if (read(fd
, super
->buf
+ sizeof(anchor
), len
) != len
) {
811 Name
": Cannot read anchor remainder on %s: %s\n",
812 devname
, strerror(errno
));
816 sectors
= mpb_sectors(&anchor
) - 1;
818 return load_imsm_disk(fd
, super
, devname
, 0);
820 /* read the extended mpb */
821 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
824 Name
": Cannot seek to extended mpb on %s: %s\n",
825 devname
, strerror(errno
));
829 len
= mpb_size
- 512;
830 if (read(fd
, super
->buf
+ 512, len
) != len
) {
833 Name
": Cannot read extended mpb on %s: %s\n",
834 devname
, strerror(errno
));
838 check_sum
= gen_imsm_checksum(super
->mpb
);
839 if (check_sum
!= __le32_to_cpu(super
->mpb
->check_sum
)) {
842 Name
": IMSM checksum %x != %x on %s\n",
843 check_sum
, __le32_to_cpu(super
->mpb
->check_sum
),
848 return load_imsm_disk(fd
, super
, devname
, 0);
851 struct superswitch super_imsm_container
;
853 static void free_imsm_disks(struct intel_super
*super
)
855 while (super
->disks
) {
856 struct dl
*d
= super
->disks
;
858 super
->disks
= d
->next
;
867 static void free_imsm(struct intel_super
*super
)
871 free_imsm_disks(super
);
876 static void free_super_imsm(struct supertype
*st
)
878 struct intel_super
*super
= st
->sb
;
887 static struct intel_super
*alloc_super(int creating_imsm
)
889 struct intel_super
*super
= malloc(sizeof(*super
));
892 memset(super
, 0, sizeof(*super
));
893 super
->creating_imsm
= creating_imsm
;
894 super
->creating_dev
= -1;
901 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
902 char *devname
, int keep_fd
)
905 struct intel_super
*super
;
906 struct mdinfo
*sd
, *best
= NULL
;
913 /* check if this disk is a member of an active array */
914 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
918 if (sra
->array
.major_version
!= -1 ||
919 sra
->array
.minor_version
!= -2 ||
920 strcmp(sra
->text_version
, "imsm") != 0)
923 super
= alloc_super(0);
927 /* find the most up to date disk in this array */
928 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
929 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
930 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
935 rv
= load_imsm_mpb(dfd
, super
, NULL
);
939 gen
= __le32_to_cpu(super
->mpb
->generation_num
);
940 if (!best
|| gen
> bestgen
) {
955 /* load the most up to date anchor */
956 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
957 dfd
= dev_open(nm
, O_RDONLY
);
962 rv
= load_imsm_mpb(dfd
, super
, NULL
);
969 /* reset the disk list */
970 free_imsm_disks(super
);
972 /* populate disk list */
973 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
974 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
975 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
980 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
985 if (st
->subarray
[0]) {
990 if (st
->ss
== NULL
) {
991 st
->ss
= &super_imsm_container
;
992 st
->minor_version
= 0;
993 st
->max_devs
= IMSM_MAX_DEVICES
;
994 st
->container_dev
= fd2devnum(fd
);
1001 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1003 struct intel_super
*super
;
1007 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1010 if (st
->subarray
[0])
1011 return 1; /* FIXME */
1013 super
= alloc_super(0);
1016 Name
": malloc of %zu failed.\n",
1021 rv
= load_imsm_mpb(fd
, super
, devname
);
1026 Name
": Failed to load all information "
1027 "sections on %s\n", devname
);
1033 if (st
->ss
== NULL
) {
1034 st
->ss
= &super_imsm
;
1035 st
->minor_version
= 0;
1036 st
->max_devs
= IMSM_MAX_DEVICES
;
1042 static int init_zero_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1043 unsigned long long size
, char *name
,
1044 char *homehost
, int *uuid
)
1050 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1051 unsigned long long size
, char *name
,
1052 char *homehost
, int *uuid
)
1054 /* This is primarily called by Create when creating a new array.
1055 * We will then get add_to_super called for each component, and then
1056 * write_init_super called to write it out to each device.
1057 * For IMSM, Create can create on fresh devices or on a pre-existing
1059 * To create on a pre-existing array a different method will be called.
1060 * This one is just for fresh drives.
1062 struct intel_super
*super
;
1063 struct imsm_super
*mpb
;
1066 super
= alloc_super(1);
1069 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1070 mpb
= malloc(mpb_size
);
1075 memset(mpb
, 0, mpb_size
);
1077 memcpy(mpb
->sig
, MPB_SIGNATURE
, strlen(MPB_SIGNATURE
));
1078 memcpy(mpb
->sig
+ strlen(MPB_SIGNATURE
), MPB_VERSION_RAID5
,
1079 strlen(MPB_VERSION_RAID5
));
1080 mpb
->mpb_size
= mpb_size
;
1087 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1088 unsigned long long size
, char *name
,
1089 char *homehost
, int *uuid
)
1091 /* We are creating a volume inside a pre-existing container.
1092 * so st->sb is already set.
1094 struct intel_super
*super
= st
->sb
;
1095 struct imsm_super
*mpb
= super
->mpb
;
1096 struct imsm_dev
*dev
;
1097 struct imsm_vol
*vol
;
1098 struct imsm_map
*map
;
1099 int idx
= mpb
->num_raid_devs
;
1101 unsigned long long array_blocks
;
1102 unsigned long long sz
;
1105 if (mpb
->num_raid_devs
>= 2) {
1106 fprintf(stderr
, Name
": This imsm-container already has the "
1107 "maximum of 2 volumes\n");
1111 super
->creating_dev
= idx
;
1112 mpb
->num_raid_devs
++;
1113 dev
= get_imsm_dev(mpb
, idx
);
1114 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1115 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1116 info
->layout
, info
->chunk_size
,
1118 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1119 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1120 dev
->status
= __cpu_to_le32(0);
1121 dev
->reserved_blocks
= __cpu_to_le32(0);
1123 vol
->migr_state
= 0;
1126 for (i
= 0; i
< idx
; i
++) {
1127 struct imsm_dev
*prev
= get_imsm_dev(mpb
, i
);
1128 struct imsm_map
*pmap
= &prev
->vol
.map
[0];
1130 offset
+= __le32_to_cpu(pmap
->blocks_per_member
);
1131 offset
+= IMSM_RESERVED_SECTORS
;
1134 map
->pba_of_lba0
= __cpu_to_le32(offset
);
1135 sz
= info
->size
* 2;
1136 map
->blocks_per_member
= __cpu_to_le32(sz
);
1137 map
->blocks_per_strip
= __cpu_to_le16(info
->chunk_size
>> 9);
1138 map
->num_data_stripes
= __cpu_to_le32(sz
/ (info
->chunk_size
>> 9));
1139 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1140 IMSM_T_STATE_NORMAL
;
1141 if (info
->level
== 10)
1142 map
->raid_level
= 1;
1144 map
->raid_level
= info
->level
;
1145 map
->num_members
= info
->raid_disks
;
1146 for (i
= 0; i
< map
->num_members
; i
++) {
1147 /* initialized in add_to_super */
1148 map
->disk_ord_tbl
[i
] = __cpu_to_le32(0);
1154 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1155 int fd
, char *devname
)
1157 struct intel_super
*super
= st
->sb
;
1158 struct imsm_super
*mpb
= super
->mpb
;
1159 struct imsm_disk
*disk
;
1161 unsigned long long size
;
1167 dd
= malloc(sizeof(*dd
));
1170 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
1173 memset(dd
, 0, sizeof(*dd
));
1174 dd
->major
= major(stb
.st_rdev
);
1175 dd
->minor
= minor(stb
.st_rdev
);
1176 dd
->index
= dk
->number
;
1177 dd
->devname
= devname
? strdup(devname
) : NULL
;
1178 dd
->next
= super
->disks
;
1180 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
1183 Name
": failed to retrieve scsi serial "
1184 "using \'%s\' instead\n", devname
);
1185 strcpy((char *) dd
->serial
, devname
);
1188 if (mpb
->num_disks
<= dk
->number
)
1189 mpb
->num_disks
= dk
->number
+ 1;
1191 disk
= get_imsm_disk(mpb
, dk
->number
);
1192 get_dev_size(fd
, NULL
, &size
);
1194 status
= USABLE_DISK
| SPARE_DISK
;
1195 strcpy((char *) disk
->serial
, (char *) dd
->serial
);
1196 disk
->total_blocks
= __cpu_to_le32(size
);
1197 disk
->status
= __cpu_to_le32(status
);
1198 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
1199 disk
->scsi_id
= __cpu_to_le32(id
);
1201 disk
->scsi_id
= __cpu_to_le32(0);
1203 /* update the family number if we are creating a container */
1204 if (super
->creating_imsm
)
1205 mpb
->family_num
= __cpu_to_le32(gen_imsm_checksum(mpb
));
1210 static void add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1211 int fd
, char *devname
)
1213 struct intel_super
*super
= st
->sb
;
1214 struct imsm_super
*mpb
= super
->mpb
;
1216 struct imsm_dev
*dev
;
1217 struct imsm_map
*map
;
1218 struct imsm_disk
*disk
;
1221 if (super
->creating_dev
== -1) {
1222 fprintf(stderr
, Name
": no active raid device\n");
1226 dev
= get_imsm_dev(mpb
, super
->creating_dev
);
1227 map
= &dev
->vol
.map
[0];
1229 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1230 if (dl
->major
== dk
->major
&&
1231 dl
->minor
== dk
->minor
)
1233 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1236 map
->disk_ord_tbl
[dk
->number
] = __cpu_to_le32(dl
->index
);
1238 disk
= get_imsm_disk(mpb
, dl
->index
);
1239 status
= CONFIGURED_DISK
| USABLE_DISK
;
1240 disk
->status
= __cpu_to_le32(status
);
1243 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
1245 static int write_super_imsm(struct intel_super
*super
, int doclose
)
1247 struct imsm_super
*mpb
= super
->mpb
;
1252 /* 'generation' is incremented everytime the metadata is written */
1253 generation
= __le32_to_cpu(mpb
->generation_num
);
1255 mpb
->generation_num
= __cpu_to_le32(generation
);
1257 /* recalculate checksum */
1258 sum
= gen_imsm_checksum(mpb
);
1259 mpb
->check_sum
= __cpu_to_le32(sum
);
1261 for (d
= super
->disks
; d
; d
= d
->next
) {
1262 if (store_imsm_mpb(d
->fd
, super
)) {
1263 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1264 __func__
, d
->major
, d
->minor
, strerror(errno
));
1276 static int write_init_super_imsm(struct supertype
*st
)
1278 return write_super_imsm(st
->sb
, 1);
1281 static int store_zero_imsm(struct supertype
*st
, int fd
)
1283 unsigned long long dsize
;
1286 get_dev_size(fd
, NULL
, &dsize
);
1288 /* first block is stored on second to last sector of the disk */
1289 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1292 memset(buf
, 0, sizeof(buf
));
1293 if (write(fd
, buf
, sizeof(buf
)) != sizeof(buf
))
1298 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
1299 int raiddisks
, int chunk
, unsigned long long size
,
1300 char *dev
, unsigned long long *freesize
)
1305 /* if given unused devices create a container
1306 * if given given devices in a container create a member volume
1308 if (level
== LEVEL_CONTAINER
) {
1309 st
->ss
= &super_imsm_container
;
1311 /* validate the container, dev == NULL */
1312 int rv
= st
->ss
->validate_geometry(st
, level
, layout
,
1319 return st
->ss
->validate_geometry(st
, level
, layout
, raiddisks
,
1320 chunk
, size
, dev
, freesize
);
1324 /* creating in a given container */
1325 st
->ss
= &super_imsm_volume
;
1327 int rv
= st
->ss
->validate_geometry(st
, level
, layout
,
1334 return st
->ss
->validate_geometry(st
, level
, layout
, raiddisks
,
1335 chunk
, size
, dev
, freesize
);
1338 /* limit creation to the following levels */
1350 /* This device needs to be a device in an 'imsm' container */
1351 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1354 Name
": Cannot create this array on device %s\n",
1359 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
1360 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1361 dev
, strerror(errno
));
1364 /* Well, it is in use by someone, maybe an 'imsm' container. */
1365 cfd
= open_container(fd
);
1368 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
1372 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
1374 if (sra
&& sra
->array
.major_version
== -1 &&
1375 strcmp(sra
->text_version
, "imsm") == 0) {
1376 /* This is a member of a imsm container. Load the container
1377 * and try to create a volume
1379 struct intel_super
*super
;
1380 st
->ss
= &super_imsm_volume
;
1381 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
1383 st
->container_dev
= fd2devnum(cfd
);
1385 return st
->ss
->validate_geometry(st
, level
, layout
,
1386 raiddisks
, chunk
, size
,
1390 } else /* may belong to another container */
1396 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
1397 int layout
, int raiddisks
, int chunk
,
1398 unsigned long long size
, char *dev
,
1399 unsigned long long *freesize
)
1402 unsigned long long ldsize
;
1404 if (level
!= LEVEL_CONTAINER
)
1409 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
1411 fprintf(stderr
, Name
": Cannot open %s: %s\n",
1412 dev
, strerror(errno
));
1415 if (!get_dev_size(fd
, dev
, &ldsize
)) {
1421 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
1426 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1427 * FIX ME add ahci details
1429 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
1430 int layout
, int raiddisks
, int chunk
,
1431 unsigned long long size
, char *dev
,
1432 unsigned long long *freesize
)
1435 struct intel_super
*super
= st
->sb
;
1437 unsigned long long pos
= 0;
1438 unsigned long long maxsize
;
1442 if (level
== LEVEL_CONTAINER
)
1445 if (level
== 1 && raiddisks
> 2) {
1446 fprintf(stderr
, Name
": imsm does not support more than 2 "
1447 "in a raid1 configuration\n");
1451 /* We must have the container info already read in. */
1456 /* General test: make sure there is space for
1457 * 'raiddisks' device extents of size 'size'.
1459 unsigned long long minsize
= size
*2 /* convert to blocks */;
1462 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1463 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1467 e
= get_extents(super
, dl
);
1470 unsigned long long esize
;
1471 esize
= e
[i
].start
- pos
;
1472 if (esize
>= minsize
)
1474 pos
= e
[i
].start
+ e
[i
].size
;
1476 } while (e
[i
-1].size
);
1481 if (dcnt
< raiddisks
) {
1482 fprintf(stderr
, Name
": Not enough devices with space "
1483 "for this array (%d < %d)\n",
1489 /* This device must be a member of the set */
1490 if (stat(dev
, &stb
) < 0)
1492 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
1494 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1495 if (dl
->major
== major(stb
.st_rdev
) &&
1496 dl
->minor
== minor(stb
.st_rdev
))
1500 fprintf(stderr
, Name
": %s is not in the same imsm set\n",
1504 e
= get_extents(super
, dl
);
1508 unsigned long long esize
;
1509 esize
= e
[i
].start
- pos
;
1510 if (esize
>= maxsize
)
1512 pos
= e
[i
].start
+ e
[i
].size
;
1514 } while (e
[i
-1].size
);
1515 *freesize
= maxsize
;
1520 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
1522 /* Given a container loaded by load_super_imsm_all,
1523 * extract information about all the arrays into
1526 * For each imsm_dev create an mdinfo, fill it in,
1527 * then look for matching devices in super->disks
1528 * and create appropriate device mdinfo.
1530 struct intel_super
*super
= st
->sb
;
1531 struct imsm_super
*mpb
= super
->mpb
;
1532 struct mdinfo
*rest
= NULL
;
1535 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1536 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
1537 struct imsm_vol
*vol
= &dev
->vol
;
1538 struct imsm_map
*map
= vol
->map
;
1539 struct mdinfo
*this;
1543 this = malloc(sizeof(*this));
1544 memset(this, 0, sizeof(*this));
1548 this->array
.level
= get_imsm_raid_level(map
);
1549 this->array
.raid_disks
= map
->num_members
;
1550 this->array
.layout
= imsm_level_to_layout(this->array
.level
);
1551 this->array
.md_minor
= -1;
1552 this->array
.ctime
= 0;
1553 this->array
.utime
= 0;
1554 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1555 this->array
.state
= !vol
->dirty
;
1556 this->container_member
= i
;
1557 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1558 this->resync_start
= 0;
1560 this->resync_start
= ~0ULL;
1562 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1563 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
1565 sprintf(this->text_version
, "/%s/%d",
1566 devnum2devname(st
->container_dev
),
1567 this->container_member
);
1569 memset(this->uuid
, 0, sizeof(this->uuid
));
1571 sz
= __le32_to_cpu(dev
->size_high
);
1573 sz
+= __le32_to_cpu(dev
->size_low
);
1574 this->component_size
= sz
;
1575 this->array
.size
= this->component_size
/ 2;
1577 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
1578 struct imsm_disk
*disk
;
1579 struct mdinfo
*info_d
;
1584 idx
= __le32_to_cpu(map
->disk_ord_tbl
[slot
] & ~(0xff << 24));
1585 for (d
= super
->disks
; d
; d
= d
->next
)
1586 if (d
->index
== idx
)
1590 break; /* shouldn't this be continue ?? */
1592 info_d
= malloc(sizeof(*info_d
));
1594 break; /* ditto ?? */
1595 memset(info_d
, 0, sizeof(*info_d
));
1596 info_d
->next
= this->devs
;
1597 this->devs
= info_d
;
1599 disk
= get_imsm_disk(mpb
, idx
);
1600 s
= __le32_to_cpu(disk
->status
);
1602 info_d
->disk
.number
= d
->index
;
1603 info_d
->disk
.major
= d
->major
;
1604 info_d
->disk
.minor
= d
->minor
;
1605 info_d
->disk
.raid_disk
= slot
;
1606 info_d
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
1607 info_d
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
1608 info_d
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
1610 this->array
.working_disks
++;
1612 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
1613 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1614 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1616 strcpy(info_d
->name
, d
->devname
);
1624 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
1627 dprintf("imsm: open_new %s\n", inst
);
1628 a
->info
.container_member
= atoi(inst
);
1632 static __u8
imsm_check_degraded(struct imsm_super
*mpb
, int n
, int failed
)
1634 struct imsm_dev
*dev
= get_imsm_dev(mpb
, n
);
1635 struct imsm_map
*map
= dev
->vol
.map
;
1638 return map
->map_state
;
1640 switch (get_imsm_raid_level(map
)) {
1642 return IMSM_T_STATE_FAILED
;
1645 if (failed
< map
->num_members
)
1646 return IMSM_T_STATE_DEGRADED
;
1648 return IMSM_T_STATE_FAILED
;
1653 * check to see if any mirrors have failed,
1654 * otherwise we are degraded
1656 int device_per_mirror
= 2; /* FIXME is this always the case?
1657 * and are they always adjacent?
1662 for (i
= 0; i
< map
->num_members
; i
++) {
1663 int idx
= get_imsm_disk_idx(map
, i
);
1664 struct imsm_disk
*disk
= get_imsm_disk(mpb
, idx
);
1666 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1669 if (failed
>= device_per_mirror
)
1670 return IMSM_T_STATE_FAILED
;
1672 /* reset 'failed' for next mirror set */
1673 if (!((i
+ 1) % device_per_mirror
))
1677 return IMSM_T_STATE_DEGRADED
;
1681 return IMSM_T_STATE_DEGRADED
;
1683 return IMSM_T_STATE_FAILED
;
1689 return map
->map_state
;
1692 static int imsm_count_failed(struct imsm_super
*mpb
, struct imsm_map
*map
)
1696 struct imsm_disk
*disk
;
1698 for (i
= 0; i
< map
->num_members
; i
++) {
1699 int idx
= get_imsm_disk_idx(map
, i
);
1701 disk
= get_imsm_disk(mpb
, idx
);
1702 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1709 static void imsm_set_array_state(struct active_array
*a
, int consistent
)
1711 int inst
= a
->info
.container_member
;
1712 struct intel_super
*super
= a
->container
->sb
;
1713 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1714 struct imsm_map
*map
= &dev
->vol
.map
[0];
1715 int dirty
= !consistent
;
1719 if (a
->resync_start
== ~0ULL) {
1720 failed
= imsm_count_failed(super
->mpb
, map
);
1721 map_state
= imsm_check_degraded(super
->mpb
, inst
, failed
);
1723 map_state
= IMSM_T_STATE_NORMAL
;
1724 if (map
->map_state
!= map_state
) {
1725 dprintf("imsm: map_state %d: %d\n",
1727 map
->map_state
= map_state
;
1728 super
->updates_pending
++;
1732 if (dev
->vol
.dirty
!= dirty
) {
1733 dprintf("imsm: mark '%s' (%llu)\n",
1734 dirty
?"dirty":"clean", a
->resync_start
);
1736 dev
->vol
.dirty
= dirty
;
1737 super
->updates_pending
++;
1741 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
1743 int inst
= a
->info
.container_member
;
1744 struct intel_super
*super
= a
->container
->sb
;
1745 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1746 struct imsm_map
*map
= dev
->vol
.map
;
1747 struct imsm_disk
*disk
;
1750 int new_failure
= 0;
1752 if (n
> map
->num_members
)
1753 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
1754 n
, map
->num_members
- 1);
1759 dprintf("imsm: set_disk %d:%x\n", n
, state
);
1761 disk
= get_imsm_disk(super
->mpb
, get_imsm_disk_idx(map
, n
));
1763 /* check if we have seen this failure before */
1764 status
= __le32_to_cpu(disk
->status
);
1765 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
1766 status
|= FAILED_DISK
;
1767 disk
->status
= __cpu_to_le32(status
);
1772 * the number of failures have changed, count up 'failed' to determine
1773 * degraded / failed status
1775 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
1776 failed
= imsm_count_failed(super
->mpb
, map
);
1779 map
->map_state
= imsm_check_degraded(super
->mpb
, inst
, failed
);
1782 super
->updates_pending
++;
1785 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
1787 struct imsm_super
*mpb
= super
->mpb
;
1788 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
1789 unsigned long long dsize
;
1790 unsigned long long sectors
;
1792 get_dev_size(fd
, NULL
, &dsize
);
1794 if (mpb_size
> 512) {
1795 /* -1 to account for anchor */
1796 sectors
= mpb_sectors(mpb
) - 1;
1798 /* write the extended mpb to the sectors preceeding the anchor */
1799 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
1802 if (write(fd
, super
->buf
+ 512, mpb_size
- 512) != mpb_size
- 512)
1806 /* first block is stored on second to last sector of the disk */
1807 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1810 if (write(fd
, super
->buf
, 512) != 512)
1818 static void imsm_sync_metadata(struct supertype
*container
)
1820 struct intel_super
*super
= container
->sb
;
1822 if (!super
->updates_pending
)
1825 write_super_imsm(super
, 0);
1827 super
->updates_pending
= 0;
1830 struct superswitch super_imsm
= {
1832 .examine_super
= examine_super_imsm
,
1833 .brief_examine_super
= brief_examine_super_imsm
,
1834 .detail_super
= detail_super_imsm
,
1835 .brief_detail_super
= brief_detail_super_imsm
,
1837 .match_home
= match_home_imsm
,
1838 .uuid_from_super
= uuid_from_super_imsm
,
1839 .getinfo_super
= getinfo_super_imsm
,
1840 .update_super
= update_super_imsm
,
1842 .avail_size
= avail_size_imsm
,
1844 .compare_super
= compare_super_imsm
,
1846 .load_super
= load_super_imsm
,
1847 .init_super
= init_zero_imsm
,
1848 .store_super
= store_zero_imsm
,
1849 .free_super
= free_super_imsm
,
1850 .match_metadata_desc
= match_metadata_desc_imsm
,
1852 .validate_geometry
= validate_geometry_imsm
,
1856 .open_new
= imsm_open_new
,
1857 .load_super
= load_super_imsm
,
1858 .set_array_state
= imsm_set_array_state
,
1859 .set_disk
= imsm_set_disk
,
1860 .sync_metadata
= imsm_sync_metadata
,
1863 /* super_imsm_container is set by validate_geometry_imsm when given a
1864 * device that is not part of any array
1866 struct superswitch super_imsm_container
= {
1868 .validate_geometry
= validate_geometry_imsm_container
,
1869 .init_super
= init_super_imsm
,
1870 .add_to_super
= add_to_super_imsm
,
1871 .write_init_super
= write_init_super_imsm
,
1872 .getinfo_super
= getinfo_super_imsm
,
1873 .load_super
= load_super_imsm
,
1876 .examine_super
= examine_super_imsm
,
1877 .brief_examine_super
= brief_examine_super_imsm
,
1878 .detail_super
= detail_super_imsm
,
1879 .brief_detail_super
= brief_detail_super_imsm
,
1882 .free_super
= free_super_imsm
,
1884 .container_content
= container_content_imsm
,
1889 static struct superswitch super_imsm_volume
= {
1890 .update_super
= update_super_imsm
,
1891 .init_super
= init_super_imsm_volume
,
1892 .add_to_super
= add_to_super_imsm_volume
,
1893 .getinfo_super
= getinfo_super_imsm_volume
,
1894 .write_init_super
= write_init_super_imsm
,
1896 .load_super
= load_super_imsm
,
1897 .free_super
= free_super_imsm
,
1898 .match_metadata_desc
= match_metadata_desc_imsm_volume
,
1901 .validate_geometry
= validate_geometry_imsm_volume
,