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
35 /* Disk configuration info. */
36 #define IMSM_MAX_DEVICES 255
38 __u8 serial
[MAX_RAID_SERIAL_LEN
];/* 0xD8 - 0xE7 ascii serial number */
39 __u32 total_blocks
; /* 0xE8 - 0xEB total blocks */
40 __u32 scsi_id
; /* 0xEC - 0xEF scsi ID */
41 __u32 status
; /* 0xF0 - 0xF3 */
42 #define SPARE_DISK 0x01 /* Spare */
43 #define CONFIGURED_DISK 0x02 /* Member of some RaidDev */
44 #define FAILED_DISK 0x04 /* Permanent failure */
45 #define USABLE_DISK 0x08 /* Fully usable unless FAILED_DISK is set */
47 #define IMSM_DISK_FILLERS 5
48 __u32 filler
[IMSM_DISK_FILLERS
]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
51 /* RAID map configuration infos. */
53 __u32 pba_of_lba0
; /* start address of partition */
54 __u32 blocks_per_member
;/* blocks per member */
55 __u32 num_data_stripes
; /* number of data stripes */
56 __u16 blocks_per_strip
;
57 __u8 map_state
; /* Normal, Uninitialized, Degraded, Failed */
58 #define IMSM_T_STATE_NORMAL 0
59 #define IMSM_T_STATE_UNINITIALIZED 1
60 #define IMSM_T_STATE_DEGRADED 2 /* FIXME: is this correct? */
61 #define IMSM_T_STATE_FAILED 3 /* FIXME: is this correct? */
63 #define IMSM_T_RAID0 0
64 #define IMSM_T_RAID1 1
65 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
66 __u8 num_members
; /* number of member disks */
68 __u32 filler
[7]; /* expansion area */
69 __u32 disk_ord_tbl
[1]; /* disk_ord_tbl[num_members],
71 } __attribute__ ((packed
));
75 __u8 migr_state
; /* Normal or Migrating */
76 __u8 migr_type
; /* Initializing, Rebuilding, ... */
80 struct imsm_map map
[1];
81 /* here comes another one if migr_state */
82 } __attribute__ ((packed
));
85 __u8 volume
[MAX_RAID_SERIAL_LEN
];
88 __u32 status
; /* Persistent RaidDev status */
89 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
90 #define IMSM_DEV_FILLERS 12
91 __u32 filler
[IMSM_DEV_FILLERS
];
93 } __attribute__ ((packed
));
96 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
97 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
98 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
99 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
100 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
101 __u32 reserved
[2]; /* 0x30 - 0x37 */
102 __u8 num_disks
; /* 0x38 Number of configured disks */
103 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
104 __u8 fill
[2]; /* 0x3A - 0x3B */
105 #define IMSM_FILLERS 39
106 __u32 filler
[IMSM_FILLERS
]; /* 0x3C - 0xD7 RAID_MPB_FILLERS */
107 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
108 /* here comes imsm_dev[num_raid_devs] */
109 } __attribute__ ((packed
));
112 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
115 static unsigned long long mpb_sectors(struct imsm_super
*mpb
)
117 __u32 size
= __le32_to_cpu(mpb
->mpb_size
);
119 return ((size
+ (512-1)) & (~(512-1))) / 512;
122 /* internal representation of IMSM metadata */
125 struct imsm_super
*mpb
;
132 __u8 serial
[MAX_RAID_SERIAL_LEN
];
139 static struct supertype
*match_metadata_desc_imsm(char *arg
)
141 struct supertype
*st
;
143 if (strcmp(arg
, "imsm") != 0 &&
144 strcmp(arg
, "default") != 0
148 st
= malloc(sizeof(*st
));
149 st
->ss
= &super_imsm
;
150 st
->max_devs
= IMSM_MAX_DEVICES
;
151 st
->minor_version
= 0;
156 static struct supertype
*match_metadata_desc_imsm_raid(char *arg
)
158 struct supertype
*st
;
160 if (strcmp(arg
, "imsm/raid") != 0 &&
161 strcmp(arg
, "raid") != 0 &&
162 strcmp(arg
, "default") != 0
166 st
= malloc(sizeof(*st
));
167 st
->ss
= &super_imsm_raid
;
168 st
->max_devs
= IMSM_MAX_DEVICES
;
169 st
->minor_version
= 0;
174 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
176 return &mpb
->sig
[MPB_SIG_LEN
];
179 static struct imsm_disk
*get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
181 if (index
> mpb
->num_disks
- 1)
183 return &mpb
->disk
[index
];
186 static __u32
gen_imsm_checksum(struct imsm_super
*mpb
)
188 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
189 __u32
*p
= (__u32
*) mpb
;
193 sum
+= __le32_to_cpu(*p
++);
195 return sum
- __le32_to_cpu(mpb
->check_sum
);
198 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
)
200 size_t size
= sizeof(*dev
);
202 /* each map has disk_ord_tbl[num_members - 1] additional space */
203 size
+= sizeof(__u32
) * (dev
->vol
.map
[0].num_members
- 1);
205 /* migrating means an additional map */
206 if (dev
->vol
.migr_state
) {
207 size
+= sizeof(struct imsm_map
);
208 size
+= sizeof(__u32
) * (dev
->vol
.map
[1].num_members
- 1);
214 static struct imsm_dev
*get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
220 if (index
> mpb
->num_raid_devs
- 1)
223 /* devices start after all disks */
224 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
226 for (i
= 0; i
<= index
; i
++)
228 return _mpb
+ offset
;
230 offset
+= sizeof_imsm_dev(_mpb
+ offset
);
235 static __u32
get_imsm_disk_idx(struct imsm_map
*map
, int slot
)
237 __u32
*ord_tbl
= &map
->disk_ord_tbl
[slot
];
239 /* top byte is 'special' */
240 return __le32_to_cpu(*ord_tbl
& ~(0xff << 24));
243 static int get_imsm_raid_level(struct imsm_map
*map
)
245 if (map
->raid_level
== 1) {
246 if (map
->num_members
== 2)
252 return map
->raid_level
;
256 static void print_imsm_dev(struct imsm_dev
*dev
, int index
)
260 struct imsm_map
*map
= dev
->vol
.map
;
263 printf("[%s]:\n", dev
->volume
);
264 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
265 printf(" Members : %d\n", map
->num_members
);
266 for (slot
= 0; slot
< map
->num_members
; slot
++)
267 if (index
== get_imsm_disk_idx(map
, slot
))
269 if (slot
< map
->num_members
)
270 printf(" This Slot : %d\n", slot
);
272 printf(" This Slot : ?\n");
273 sz
= __le32_to_cpu(dev
->size_high
);
275 sz
+= __le32_to_cpu(dev
->size_low
);
276 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
277 human_size(sz
* 512));
278 sz
= __le32_to_cpu(map
->blocks_per_member
);
279 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
280 human_size(sz
* 512));
281 printf(" Sector Offset : %u\n",
282 __le32_to_cpu(map
->pba_of_lba0
));
283 printf(" Num Stripes : %u\n",
284 __le32_to_cpu(map
->num_data_stripes
));
285 printf(" Chunk Size : %u KiB\n",
286 __le16_to_cpu(map
->blocks_per_strip
) / 2);
287 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
288 printf(" Migrate State : %s\n", dev
->vol
.migr_state
? "migrating" : "idle");
289 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
290 printf(" Map State : %s\n", map_state_str
[map
->map_state
]);
293 static void print_imsm_disk(struct imsm_super
*mpb
, int index
)
295 struct imsm_disk
*disk
= get_imsm_disk(mpb
, index
);
296 char str
[MAX_RAID_SERIAL_LEN
];
301 snprintf(str
, MAX_RAID_SERIAL_LEN
, "%s", disk
->serial
);
302 printf(" Disk%02d Serial : %s\n", index
, str
);
303 s
= __le32_to_cpu(disk
->status
);
304 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
305 s
&CONFIGURED_DISK
? " active" : "",
306 s
&FAILED_DISK
? " failed" : "",
307 s
&USABLE_DISK
? " usable" : "");
308 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
309 sz
= __le32_to_cpu(disk
->total_blocks
) - mpb_sectors(mpb
);
310 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
311 human_size(sz
* 512));
314 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
316 struct intel_super
*super
= st
->sb
;
317 struct imsm_super
*mpb
= super
->mpb
;
318 char str
[MAX_SIGNATURE_LENGTH
];
322 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
323 printf(" Magic : %s\n", str
);
324 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
325 printf(" Version : %s\n", get_imsm_version(mpb
));
326 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
327 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
328 sum
= __le32_to_cpu(mpb
->check_sum
);
329 printf(" Checksum : %08x %s\n", sum
,
330 gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
331 printf(" Disks : %d\n", mpb
->num_disks
);
332 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
333 print_imsm_disk(mpb
, super
->disks
->index
);
334 for (i
= 0; i
< mpb
->num_raid_devs
; i
++)
335 print_imsm_dev(get_imsm_dev(mpb
, i
), super
->disks
->index
);
336 for (i
= 0; i
< mpb
->num_disks
; i
++) {
337 if (i
== super
->disks
->index
)
339 print_imsm_disk(mpb
, i
);
343 static void brief_examine_super_imsm(struct supertype
*st
)
345 struct intel_super
*super
= st
->sb
;
346 struct imsm_super
*mpb
= super
->mpb
;
348 printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
349 __le32_to_cpu(mpb
->family_num
));
352 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
354 printf("%s\n", __FUNCTION__
);
357 static void brief_detail_super_imsm(struct supertype
*st
)
359 printf("%s\n", __FUNCTION__
);
363 static int match_home_imsm(struct supertype
*st
, char *homehost
)
365 printf("%s\n", __FUNCTION__
);
370 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
372 printf("%s\n", __FUNCTION__
);
376 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
378 __u8
*v
= get_imsm_version(mpb
);
379 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
380 char major
[] = { 0, 0, 0 };
381 char minor
[] = { 0 ,0, 0 };
382 char patch
[] = { 0, 0, 0 };
383 char *ver_parse
[] = { major
, minor
, patch
};
387 while (*v
!= '\0' && v
< end
) {
388 if (*v
!= '.' && j
< 2)
389 ver_parse
[i
][j
++] = *v
;
397 *m
= strtol(minor
, NULL
, 0);
398 *p
= strtol(patch
, NULL
, 0);
401 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
403 struct intel_super
*super
= st
->sb
;
404 struct imsm_super
*mpb
= super
->mpb
;
405 struct imsm_disk
*disk
;
409 info
->array
.major_version
= 2000;
410 get_imsm_numerical_version(mpb
, &info
->array
.minor_version
,
411 &info
->array
.patch_version
);
412 info
->array
.raid_disks
= mpb
->num_disks
;
413 info
->array
.level
= LEVEL_CONTAINER
;
414 info
->array
.layout
= 0;
415 info
->array
.md_minor
= -1;
416 info
->array
.ctime
= __le32_to_cpu(mpb
->generation_num
); //??
417 info
->array
.utime
= 0;
418 info
->array
.chunk_size
= 0;
420 info
->disk
.major
= 0;
421 info
->disk
.minor
= 0;
422 info
->disk
.number
= super
->disks
->index
;
423 info
->disk
.raid_disk
= -1;
424 /* is this disk a member of a raid device? */
425 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
426 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
427 struct imsm_map
*map
= dev
->vol
.map
;
429 for (j
= 0; j
< map
->num_members
; j
++) {
430 __u32 index
= get_imsm_disk_idx(map
, j
);
432 if (index
== super
->disks
->index
) {
433 info
->disk
.raid_disk
= super
->disks
->index
;
437 if (info
->disk
.raid_disk
!= -1)
440 disk
= get_imsm_disk(mpb
, super
->disks
->index
);
441 s
= __le32_to_cpu(disk
->status
);
442 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
443 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
444 info
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
445 info
->reshape_active
= 0;
447 strcpy(info
->text_version
, "imsm");
450 static void getinfo_super_imsm_raid(struct supertype
*st
, struct mdinfo
*info
)
452 printf("%s\n", __FUNCTION__
);
454 sprintf(info
->text_version
, "/%s/%d",
455 devnum2devname(st
->container_dev
),
456 info
->container_member
); // FIXME is this even set here?
459 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
460 char *update
, char *devname
, int verbose
,
461 int uuid_set
, char *homehost
)
465 /* For 'assemble' and 'force' we need to return non-zero if any
466 * change was made. For others, the return value is ignored.
467 * Update options are:
468 * force-one : This device looks a bit old but needs to be included,
469 * update age info appropriately.
470 * assemble: clear any 'faulty' flag to allow this device to
472 * force-array: Array is degraded but being forced, mark it clean
473 * if that will be needed to assemble it.
475 * newdev: not used ????
476 * grow: Array has gained a new device - this is currently for
478 * resync: mark as dirty so a resync will happen.
479 * name: update the name - preserving the homehost
481 * Following are not relevant for this imsm:
482 * sparc2.2 : update from old dodgey metadata
483 * super-minor: change the preferred_minor number
484 * summaries: update redundant counters.
485 * uuid: Change the uuid of the array to match watch is given
486 * homehost: update the recorded homehost
487 * _reshape_progress: record new reshape_progress position.
490 //struct intel_super *super = st->sb;
491 //struct imsm_super *mpb = super->mpb;
493 if (strcmp(update
, "grow") == 0) {
495 if (strcmp(update
, "resync") == 0) {
496 /* dev->vol.dirty = 1; */
499 /* IMSM has no concept of UUID or homehost */
504 static __u64
avail_size_imsm(struct supertype
*st
, __u64 size
)
506 printf("%s\n", __FUNCTION__
);
511 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
515 * 0 same, or first was empty, and second was copied
516 * 1 second had wrong number
520 struct intel_super
*first
= st
->sb
;
521 struct intel_super
*sec
= tst
->sb
;
529 if (memcmp(first
->mpb
->sig
, sec
->mpb
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
531 if (first
->mpb
->family_num
!= sec
->mpb
->family_num
)
533 if (first
->mpb
->mpb_size
!= sec
->mpb
->mpb_size
)
535 if (first
->mpb
->check_sum
!= sec
->mpb
->check_sum
)
541 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
543 static int imsm_read_serial(int fd
, char *devname
,
544 __u8 serial
[MAX_RAID_SERIAL_LEN
])
546 unsigned char scsi_serial
[255];
555 memset(scsi_serial
, 0, sizeof(scsi_serial
));
557 minor
= minor(stb
.st_rdev
);
560 sprintf(sg_path
, "/dev/sg%d", minor
);
561 sg_fd
= open(sg_path
, O_RDONLY
);
565 Name
": Failed to open %s for %s: %s\n",
566 sg_path
, devname
, strerror(errno
));
570 rv
= scsi_get_serial(sg_fd
, scsi_serial
, sizeof(scsi_serial
));
576 Name
": Failed to retrieve serial for %s\n",
581 rsp_len
= scsi_serial
[3];
582 for (i
= 0, cnt
= 0; i
< rsp_len
; i
++) {
583 if (!isspace(scsi_serial
[4 + i
]))
584 serial
[cnt
++] = scsi_serial
[4 + i
];
585 if (cnt
== MAX_RAID_SERIAL_LEN
)
589 serial
[MAX_RAID_SERIAL_LEN
- 1] = '\0';
595 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
597 struct imsm_super
*mpb
= super
->mpb
;
600 struct imsm_disk
*disk
;
604 dl
= malloc(sizeof(*dl
));
608 Name
": failed to allocate disk buffer for %s\n",
612 memset(dl
, 0, sizeof(*dl
));
615 dl
->major
= major(stb
.st_rdev
);
616 dl
->minor
= minor(stb
.st_rdev
);
617 dl
->next
= super
->disks
;
618 dl
->fd
= keep_fd
? fd
: -1;
619 dl
->devname
= devname
? strdup(devname
) : NULL
;
622 rv
= imsm_read_serial(fd
, devname
, dl
->serial
);
627 /* look up this disk's index */
628 for (i
= 0; i
< mpb
->num_disks
; i
++) {
629 disk
= get_imsm_disk(mpb
, i
);
631 if (memcmp(disk
->serial
, dl
->serial
, MAX_RAID_SERIAL_LEN
) == 0)
635 if (i
> mpb
->num_disks
)
643 /* load_imsm_mpb - read matrix metadata
644 * allocates super->mpb to be freed by free_super
646 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
648 unsigned long long dsize
;
649 size_t len
, mpb_size
;
650 unsigned long long sectors
;
652 struct imsm_super anchor
;
655 memset(super
, 0, sizeof(*super
));
656 get_dev_size(fd
, NULL
, &dsize
);
658 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
661 Name
": Cannot seek to anchor block on %s: %s\n",
662 devname
, strerror(errno
));
666 len
= sizeof(anchor
);
667 if (read(fd
, &anchor
, len
) != len
) {
670 Name
": Cannot read anchor block on %s: %s\n",
671 devname
, strerror(errno
));
675 if (strncmp((char *) anchor
.sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
678 Name
": no IMSM anchor on %s\n", devname
);
682 mpb_size
= __le32_to_cpu(anchor
.mpb_size
);
683 super
->mpb
= malloc(mpb_size
< 512 ? 512 : mpb_size
);
687 Name
": unable to allocate %zu byte mpb buffer\n",
691 memcpy(super
->buf
, &anchor
, sizeof(anchor
));
693 /* read the rest of the first block */
694 len
= 512 - sizeof(anchor
);
695 if (read(fd
, super
->buf
+ sizeof(anchor
), len
) != len
) {
698 Name
": Cannot read anchor remainder on %s: %s\n",
699 devname
, strerror(errno
));
703 sectors
= mpb_sectors(&anchor
) - 1;
705 return load_imsm_disk(fd
, super
, devname
, 0);
707 /* read the extended mpb */
708 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
711 Name
": Cannot seek to extended mpb on %s: %s\n",
712 devname
, strerror(errno
));
716 len
= mpb_size
- 512;
717 if (read(fd
, super
->buf
+ 512, len
) != len
) {
720 Name
": Cannot read extended mpb on %s: %s\n",
721 devname
, strerror(errno
));
725 check_sum
= gen_imsm_checksum(super
->mpb
);
726 if (check_sum
!= __le32_to_cpu(super
->mpb
->check_sum
)) {
729 Name
": IMSM checksum %x != %x on %s\n",
730 check_sum
, __le32_to_cpu(super
->mpb
->check_sum
),
735 return load_imsm_disk(fd
, super
, devname
, 0);
738 struct superswitch super_imsm_container
;
740 static void free_imsm_disks(struct intel_super
*super
)
742 while (super
->disks
) {
743 struct dl
*d
= super
->disks
;
745 super
->disks
= d
->next
;
754 static void free_imsm(struct intel_super
*super
)
758 free_imsm_disks(super
);
763 static void free_super_imsm(struct supertype
*st
)
765 struct intel_super
*super
= st
->sb
;
775 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
776 char *devname
, int keep_fd
)
779 struct intel_super
*super
;
780 struct mdinfo
*sd
, *best
= NULL
;
787 /* check if this disk is a member of an active array */
788 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
792 if (sra
->array
.major_version
!= -1 ||
793 sra
->array
.minor_version
!= -2 ||
794 strcmp(sra
->text_version
, "imsm") != 0)
797 super
= malloc(sizeof(*super
));
801 /* find the most up to date disk in this array */
802 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
803 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
804 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
809 rv
= load_imsm_mpb(dfd
, super
, NULL
);
813 gen
= __le32_to_cpu(super
->mpb
->generation_num
);
814 if (!best
|| gen
> bestgen
) {
829 /* load the most up to date anchor */
830 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
831 dfd
= dev_open(nm
, O_RDONLY
);
836 rv
= load_imsm_mpb(dfd
, super
, NULL
);
843 /* reset the disk list */
844 free_imsm_disks(super
);
846 /* populate disk list */
847 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
848 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
849 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
854 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
860 if (st
->ss
== NULL
) {
861 st
->ss
= &super_imsm_container
;
862 st
->minor_version
= 0;
863 st
->max_devs
= IMSM_MAX_DEVICES
;
870 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
872 struct intel_super
*super
;
876 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
880 super
= malloc(sizeof(*super
));
883 Name
": malloc of %zu failed.\n",
888 rv
= load_imsm_mpb(fd
, super
, devname
);
893 Name
": Failed to load all information "
894 "sections on %s\n", devname
);
900 if (st
->ss
== NULL
) {
901 st
->ss
= &super_imsm
;
902 st
->minor_version
= 0;
903 st
->max_devs
= IMSM_MAX_DEVICES
;
909 static int init_zero_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
910 unsigned long long size
, char *name
,
911 char *homehost
, int *uuid
)
913 printf("%s\n", __FUNCTION__
);
918 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
919 unsigned long long size
, char *name
,
920 char *homehost
, int *uuid
)
922 printf("%s\n", __FUNCTION__
);
927 static int init_super_imsm_raid(struct supertype
*st
, mdu_array_info_t
*info
,
928 unsigned long long size
, char *name
,
929 char *homehost
, int *uuid
)
931 printf("%s\n", __FUNCTION__
);
936 static void add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dinfo
,
937 int fd
, char *devname
)
939 printf("%s\n", __FUNCTION__
);
942 static void add_to_super_imsm_raid(struct supertype
*st
, mdu_disk_info_t
*dinfo
,
943 int fd
, char *devname
)
945 printf("%s\n", __FUNCTION__
);
948 static int write_init_super_imsm(struct supertype
*st
)
950 printf("%s\n", __FUNCTION__
);
955 static int store_zero_imsm(struct supertype
*st
, int fd
)
957 printf("%s\n", __FUNCTION__
);
962 static void getinfo_super_n_imsm_container(struct supertype
*st
, struct mdinfo
*info
)
964 /* just need offset and size...
967 struct intel_super
*super
= st
->sb
;
968 struct imsm_super
*mpb
= super
->mpb
;
969 struct imsm_disk
*disk
= get_imsm_disk(mpb
, info
->disk
.number
);
970 int sect
= mpb_sectors(mpb
);
972 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) - (2 + sect
- 1);
973 info
->component_size
= sect
;
976 static void getinfo_super_n_raid(struct supertype
*st
, struct mdinfo
*info
)
978 printf("%s\n", __FUNCTION__
);
981 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
982 int raiddisks
, int chunk
, unsigned long long size
,
983 char *subdev
, unsigned long long *freesize
)
985 printf("%s\n", __FUNCTION__
);
990 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
991 int layout
, int raiddisks
, int chunk
,
992 unsigned long long size
, char *subdev
,
993 unsigned long long *freesize
)
995 printf("%s\n", __FUNCTION__
);
1000 static int validate_geometry_imsm_raid(struct supertype
*st
, int level
,
1001 int layout
, int raiddisks
, int chunk
,
1002 unsigned long long size
, char *subdev
,
1003 unsigned long long *freesize
)
1005 printf("%s\n", __FUNCTION__
);
1010 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
1012 /* Given a container loaded by load_super_imsm_all,
1013 * extract information about all the arrays into
1016 * For each imsm_dev create an mdinfo, fill it in,
1017 * then look for matching devices in super->disks
1018 * and create appropriate device mdinfo.
1020 struct intel_super
*super
= st
->sb
;
1021 struct imsm_super
*mpb
= super
->mpb
;
1022 struct mdinfo
*rest
= NULL
;
1025 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1026 struct imsm_dev
*dev
= get_imsm_dev(mpb
, i
);
1027 struct imsm_vol
*vol
= &dev
->vol
;
1028 struct imsm_map
*map
= vol
->map
;
1029 struct mdinfo
*this;
1033 this = malloc(sizeof(*this));
1034 memset(this, 0, sizeof(*this));
1038 this->array
.major_version
= 2000;
1039 get_imsm_numerical_version(mpb
, &this->array
.minor_version
,
1040 &this->array
.patch_version
);
1041 this->array
.level
= get_imsm_raid_level(map
);
1042 this->array
.raid_disks
= map
->num_members
;
1043 switch(this->array
.level
) {
1046 this->array
.layout
= 0;
1050 this->array
.layout
= ALGORITHM_LEFT_SYMMETRIC
;
1053 this->array
.layout
= 0x102; //FIXME is this correct?
1056 this->array
.layout
= -1; // FIXME
1058 this->array
.md_minor
= -1;
1059 this->array
.ctime
= 0;
1060 this->array
.utime
= 0;
1061 this->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1062 this->array
.state
= !vol
->dirty
;
1063 this->container_member
= i
;
1064 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1065 this->resync_start
= 0;
1067 this->resync_start
= ~0ULL;
1069 strncpy(this->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1070 this->name
[MAX_RAID_SERIAL_LEN
] = 0;
1072 sprintf(this->text_version
, "/%s/%d",
1073 devnum2devname(st
->container_dev
),
1074 this->container_member
);
1076 memset(this->uuid
, 0, sizeof(this->uuid
));
1078 sz
= __le32_to_cpu(dev
->size_high
);
1080 sz
+= __le32_to_cpu(dev
->size_low
);
1081 this->component_size
= sz
;
1082 this->array
.size
= this->component_size
/ 2;
1084 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
1085 struct imsm_disk
*disk
;
1086 struct mdinfo
*info_d
;
1091 idx
= __le32_to_cpu(map
->disk_ord_tbl
[slot
] & ~(0xff << 24));
1092 for (d
= super
->disks
; d
; d
= d
->next
)
1093 if (d
->index
== idx
)
1097 break; /* shouldn't this be continue ?? */
1099 info_d
= malloc(sizeof(*info_d
));
1101 break; /* ditto ?? */
1102 memset(info_d
, 0, sizeof(*info_d
));
1103 info_d
->next
= this->devs
;
1104 this->devs
= info_d
;
1106 disk
= get_imsm_disk(mpb
, idx
);
1107 s
= __le32_to_cpu(disk
->status
);
1109 info_d
->disk
.number
= d
->index
;
1110 info_d
->disk
.major
= d
->major
;
1111 info_d
->disk
.minor
= d
->minor
;
1112 info_d
->disk
.raid_disk
= slot
;
1113 info_d
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
1114 info_d
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
1115 info_d
->disk
.state
|= s
& USABLE_DISK
? (1 << MD_DISK_SYNC
) : 0;
1117 this->array
.working_disks
++;
1119 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
1120 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1121 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1123 strcpy(info_d
->name
, d
->devname
);
1131 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
1134 fprintf(stderr
, "imsm: open_new %s\n", inst
);
1135 a
->info
.container_member
= atoi(inst
);
1139 static void imsm_set_array_state(struct active_array
*a
, int consistent
)
1141 int inst
= a
->info
.container_member
;
1142 struct intel_super
*super
= a
->container
->sb
;
1143 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1144 int dirty
= !consistent
|| (a
->resync_start
!= ~0ULL);
1146 if (dev
->vol
.dirty
!= dirty
) {
1147 fprintf(stderr
, "imsm: mark '%s' (%llu)\n",
1148 dirty
?"dirty":"clean", a
->resync_start
);
1150 dev
->vol
.dirty
= dirty
;
1151 super
->updates_pending
++;
1155 static __u8
imsm_check_degraded(struct imsm_super
*mpb
, int n
, int failed
)
1157 struct imsm_dev
*dev
= get_imsm_dev(mpb
, n
);
1158 struct imsm_map
*map
= dev
->vol
.map
;
1161 return map
->map_state
;
1163 switch (get_imsm_raid_level(map
)) {
1165 return IMSM_T_STATE_FAILED
;
1168 if (failed
< map
->num_members
)
1169 return IMSM_T_STATE_DEGRADED
;
1171 return IMSM_T_STATE_FAILED
;
1176 * check to see if any mirrors have failed,
1177 * otherwise we are degraded
1179 int device_per_mirror
= 2; /* FIXME is this always the case?
1180 * and are they always adjacent?
1185 for (i
= 0; i
< map
->num_members
; i
++) {
1186 int idx
= get_imsm_disk_idx(map
, i
);
1187 struct imsm_disk
*disk
= get_imsm_disk(mpb
, idx
);
1189 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1192 if (failed
>= device_per_mirror
)
1193 return IMSM_T_STATE_FAILED
;
1195 /* reset 'failed' for next mirror set */
1196 if (!((i
+ 1) % device_per_mirror
))
1200 return IMSM_T_STATE_DEGRADED
;
1204 return IMSM_T_STATE_DEGRADED
;
1206 return IMSM_T_STATE_FAILED
;
1212 return map
->map_state
;
1215 static int imsm_count_failed(struct imsm_super
*mpb
, struct imsm_map
*map
)
1219 struct imsm_disk
*disk
;
1221 for (i
= 0; i
< map
->num_members
; i
++) {
1222 int idx
= get_imsm_disk_idx(map
, i
);
1224 disk
= get_imsm_disk(mpb
, idx
);
1225 if (__le32_to_cpu(disk
->status
) & FAILED_DISK
)
1232 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
1234 int inst
= a
->info
.container_member
;
1235 struct intel_super
*super
= a
->container
->sb
;
1236 struct imsm_dev
*dev
= get_imsm_dev(super
->mpb
, inst
);
1237 struct imsm_map
*map
= dev
->vol
.map
;
1238 struct imsm_disk
*disk
;
1241 int new_failure
= 0;
1243 if (n
> map
->num_members
)
1244 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
1245 n
, map
->num_members
- 1);
1250 fprintf(stderr
, "imsm: set_disk %d:%x\n", n
, state
);
1252 disk
= get_imsm_disk(super
->mpb
, get_imsm_disk_idx(map
, n
));
1254 /* check if we have seen this failure before */
1255 status
= __le32_to_cpu(disk
->status
);
1256 if ((state
& DS_FAULTY
) && !(status
& FAILED_DISK
)) {
1257 status
|= FAILED_DISK
;
1258 disk
->status
= __cpu_to_le32(status
);
1263 * the number of failures have changed, count up 'failed' to determine
1264 * degraded / failed status
1266 if (new_failure
&& map
->map_state
!= IMSM_T_STATE_FAILED
)
1267 failed
= imsm_count_failed(super
->mpb
, map
);
1270 map
->map_state
= imsm_check_degraded(super
->mpb
, inst
, failed
);
1273 super
->updates_pending
++;
1276 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
1278 struct imsm_super
*mpb
= super
->mpb
;
1279 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
1280 unsigned long long dsize
;
1281 unsigned long long sectors
;
1283 get_dev_size(fd
, NULL
, &dsize
);
1285 /* first block is stored on second to last sector of the disk */
1286 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
1289 if (write(fd
, super
->buf
, 512) != 512)
1292 if (mpb_size
<= 512)
1295 /* -1 because we already wrote a sector */
1296 sectors
= mpb_sectors(mpb
) - 1;
1298 /* write the extended mpb to the sectors preceeding the anchor */
1299 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
1302 if (write(fd
, super
->buf
+ 512, mpb_size
- 512) != mpb_size
- 512)
1310 static void imsm_sync_metadata(struct active_array
*a
)
1312 struct intel_super
*super
= a
->container
->sb
;
1313 struct imsm_super
*mpb
= super
->mpb
;
1318 if (!super
->updates_pending
)
1321 fprintf(stderr
, "imsm: sync_metadata\n");
1323 /* 'generation' is incremented everytime the metadata is written */
1324 generation
= __le32_to_cpu(mpb
->generation_num
);
1326 mpb
->generation_num
= __cpu_to_le32(generation
);
1328 /* recalculate checksum */
1329 sum
= gen_imsm_checksum(mpb
);
1330 mpb
->check_sum
= __cpu_to_le32(sum
);
1332 for (d
= super
->disks
; d
; d
= d
->next
)
1333 if (store_imsm_mpb(d
->fd
, super
))
1334 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
1335 __func__
, d
->major
, d
->minor
, strerror(errno
));
1337 super
->updates_pending
= 0;
1340 struct superswitch super_imsm
= {
1342 .examine_super
= examine_super_imsm
,
1343 .brief_examine_super
= brief_examine_super_imsm
,
1344 .detail_super
= detail_super_imsm
,
1345 .brief_detail_super
= brief_detail_super_imsm
,
1347 .match_home
= match_home_imsm
,
1348 .uuid_from_super
= uuid_from_super_imsm
,
1349 .getinfo_super
= getinfo_super_imsm
,
1350 .update_super
= update_super_imsm
,
1352 .avail_size
= avail_size_imsm
,
1354 .compare_super
= compare_super_imsm
,
1356 .load_super
= load_super_imsm
,
1357 .init_super
= init_zero_imsm
,
1358 .store_super
= store_zero_imsm
,
1359 .free_super
= free_super_imsm
,
1360 .match_metadata_desc
= match_metadata_desc_imsm
,
1361 .getinfo_super_n
= getinfo_super_n_imsm_container
,
1363 .validate_geometry
= validate_geometry_imsm
,
1369 .open_new
= imsm_open_new
,
1370 .load_super
= load_super_imsm
,
1371 .set_array_state
= imsm_set_array_state
,
1372 .set_disk
= imsm_set_disk
,
1373 .sync_metadata
= imsm_sync_metadata
,
1376 /* super_imsm_container is set by validate_geometry_imsm when given a
1377 * device that is not part of any array
1379 struct superswitch super_imsm_container
= {
1381 .validate_geometry
= validate_geometry_imsm_container
,
1382 .init_super
= init_super_imsm
,
1383 .add_to_super
= add_to_super_imsm
,
1384 .write_init_super
= write_init_super_imsm
,
1385 .getinfo_super
= getinfo_super_imsm
,
1386 .getinfo_super_n
= getinfo_super_n_imsm_container
,
1387 .load_super
= load_super_imsm
,
1390 .examine_super
= examine_super_imsm
,
1391 .brief_examine_super
= brief_examine_super_imsm
,
1392 .detail_super
= detail_super_imsm
,
1393 .brief_detail_super
= brief_detail_super_imsm
,
1396 .free_super
= free_super_imsm
,
1398 .container_content
= container_content_imsm
,
1405 struct superswitch super_imsm_raid
= {
1406 .update_super
= update_super_imsm
,
1407 .init_super
= init_super_imsm_raid
,
1408 .add_to_super
= add_to_super_imsm_raid
,
1409 .getinfo_super
= getinfo_super_imsm_raid
,
1410 .getinfo_super_n
= getinfo_super_n_raid
,
1411 .write_init_super
= write_init_super_imsm
,
1413 .load_super
= load_super_imsm
,
1414 .free_super
= free_super_imsm
,
1415 .match_metadata_desc
= match_metadata_desc_imsm_raid
,
1418 .validate_geometry
= validate_geometry_imsm_raid
,