2 * mdadm - Intel(R) Matrix Storage Manager Support
4 * Copyright (C) 2002-2008 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.
20 #define HAVE_STDINT_H 1
24 #include "platform-intel.h"
30 /* MPB == Metadata Parameter Block */
31 #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
32 #define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
33 #define MPB_VERSION_RAID0 "1.0.00"
34 #define MPB_VERSION_RAID1 "1.1.00"
35 #define MPB_VERSION_MANY_VOLUMES_PER_ARRAY "1.2.00"
36 #define MPB_VERSION_3OR4_DISK_ARRAY "1.2.01"
37 #define MPB_VERSION_RAID5 "1.2.02"
38 #define MPB_VERSION_5OR6_DISK_ARRAY "1.2.04"
39 #define MPB_VERSION_CNG "1.2.06"
40 #define MPB_VERSION_ATTRIBS "1.3.00"
41 #define MAX_SIGNATURE_LENGTH 32
42 #define MAX_RAID_SERIAL_LEN 16
44 #define MPB_ATTRIB_CHECKSUM_VERIFY __cpu_to_le32(0x80000000)
45 #define MPB_ATTRIB_PM __cpu_to_le32(0x40000000)
46 #define MPB_ATTRIB_2TB __cpu_to_le32(0x20000000)
47 #define MPB_ATTRIB_RAID0 __cpu_to_le32(0x00000001)
48 #define MPB_ATTRIB_RAID1 __cpu_to_le32(0x00000002)
49 #define MPB_ATTRIB_RAID10 __cpu_to_le32(0x00000004)
50 #define MPB_ATTRIB_RAID1E __cpu_to_le32(0x00000008)
51 #define MPB_ATTRIB_RAID5 __cpu_to_le32(0x00000010)
52 #define MPB_ATTRIB_RAIDCNG __cpu_to_le32(0x00000020)
54 #define MPB_SECTOR_CNT 418
55 #define IMSM_RESERVED_SECTORS 4096
56 #define SECT_PER_MB_SHIFT 11
58 /* Disk configuration info. */
59 #define IMSM_MAX_DEVICES 255
61 __u8 serial
[MAX_RAID_SERIAL_LEN
];/* 0xD8 - 0xE7 ascii serial number */
62 __u32 total_blocks
; /* 0xE8 - 0xEB total blocks */
63 __u32 scsi_id
; /* 0xEC - 0xEF scsi ID */
64 #define SPARE_DISK __cpu_to_le32(0x01) /* Spare */
65 #define CONFIGURED_DISK __cpu_to_le32(0x02) /* Member of some RaidDev */
66 #define FAILED_DISK __cpu_to_le32(0x04) /* Permanent failure */
67 __u32 status
; /* 0xF0 - 0xF3 */
68 __u32 owner_cfg_num
; /* which config 0,1,2... owns this disk */
69 #define IMSM_DISK_FILLERS 4
70 __u32 filler
[IMSM_DISK_FILLERS
]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
73 /* RAID map configuration infos. */
75 __u32 pba_of_lba0
; /* start address of partition */
76 __u32 blocks_per_member
;/* blocks per member */
77 __u32 num_data_stripes
; /* number of data stripes */
78 __u16 blocks_per_strip
;
79 __u8 map_state
; /* Normal, Uninitialized, Degraded, Failed */
80 #define IMSM_T_STATE_NORMAL 0
81 #define IMSM_T_STATE_UNINITIALIZED 1
82 #define IMSM_T_STATE_DEGRADED 2
83 #define IMSM_T_STATE_FAILED 3
85 #define IMSM_T_RAID0 0
86 #define IMSM_T_RAID1 1
87 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
88 __u8 num_members
; /* number of member disks */
89 __u8 num_domains
; /* number of parity domains */
90 __u8 failed_disk_num
; /* valid only when state is degraded */
92 __u32 filler
[7]; /* expansion area */
93 #define IMSM_ORD_REBUILD (1 << 24)
94 __u32 disk_ord_tbl
[1]; /* disk_ord_tbl[num_members],
95 * top byte contains some flags
97 } __attribute__ ((packed
));
100 __u32 curr_migr_unit
;
101 __u32 checkpoint_id
; /* id to access curr_migr_unit */
102 __u8 migr_state
; /* Normal or Migrating */
104 #define MIGR_REBUILD 1
105 #define MIGR_VERIFY 2 /* analagous to echo check > sync_action */
106 #define MIGR_GEN_MIGR 3
107 #define MIGR_STATE_CHANGE 4
108 #define MIGR_REPAIR 5
109 __u8 migr_type
; /* Initializing, Rebuilding, ... */
111 __u8 fs_state
; /* fast-sync state for CnG (0xff == disabled) */
112 __u16 verify_errors
; /* number of mismatches */
113 __u16 bad_blocks
; /* number of bad blocks during verify */
115 struct imsm_map map
[1];
116 /* here comes another one if migr_state */
117 } __attribute__ ((packed
));
120 __u8 volume
[MAX_RAID_SERIAL_LEN
];
123 #define DEV_BOOTABLE __cpu_to_le32(0x01)
124 #define DEV_BOOT_DEVICE __cpu_to_le32(0x02)
125 #define DEV_READ_COALESCING __cpu_to_le32(0x04)
126 #define DEV_WRITE_COALESCING __cpu_to_le32(0x08)
127 #define DEV_LAST_SHUTDOWN_DIRTY __cpu_to_le32(0x10)
128 #define DEV_HIDDEN_AT_BOOT __cpu_to_le32(0x20)
129 #define DEV_CURRENTLY_HIDDEN __cpu_to_le32(0x40)
130 #define DEV_VERIFY_AND_FIX __cpu_to_le32(0x80)
131 #define DEV_MAP_STATE_UNINIT __cpu_to_le32(0x100)
132 #define DEV_NO_AUTO_RECOVERY __cpu_to_le32(0x200)
133 #define DEV_CLONE_N_GO __cpu_to_le32(0x400)
134 #define DEV_CLONE_MAN_SYNC __cpu_to_le32(0x800)
135 #define DEV_CNG_MASTER_DISK_NUM __cpu_to_le32(0x1000)
136 __u32 status
; /* Persistent RaidDev status */
137 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
141 __u8 cng_master_disk
;
145 #define IMSM_DEV_FILLERS 10
146 __u32 filler
[IMSM_DEV_FILLERS
];
148 } __attribute__ ((packed
));
151 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
152 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
153 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
154 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
155 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
156 __u32 error_log_size
; /* 0x30 - 0x33 in bytes */
157 __u32 attributes
; /* 0x34 - 0x37 */
158 __u8 num_disks
; /* 0x38 Number of configured disks */
159 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
160 __u8 error_log_pos
; /* 0x3A */
161 __u8 fill
[1]; /* 0x3B */
162 __u32 cache_size
; /* 0x3c - 0x40 in mb */
163 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
164 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
165 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
166 #define IMSM_FILLERS 35
167 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
168 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
169 /* here comes imsm_dev[num_raid_devs] */
170 /* here comes BBM logs */
171 } __attribute__ ((packed
));
173 #define BBM_LOG_MAX_ENTRIES 254
175 struct bbm_log_entry
{
176 __u64 defective_block_start
;
177 #define UNREADABLE 0xFFFFFFFF
178 __u32 spare_block_offset
;
179 __u16 remapped_marked_count
;
181 } __attribute__ ((__packed__
));
184 __u32 signature
; /* 0xABADB10C */
186 __u32 reserved_spare_block_count
; /* 0 */
187 __u32 reserved
; /* 0xFFFF */
188 __u64 first_spare_lba
;
189 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
190 } __attribute__ ((__packed__
));
194 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
197 static __u8
migr_type(struct imsm_dev
*dev
)
199 if (dev
->vol
.migr_type
== MIGR_VERIFY
&&
200 dev
->status
& DEV_VERIFY_AND_FIX
)
203 return dev
->vol
.migr_type
;
206 static void set_migr_type(struct imsm_dev
*dev
, __u8 migr_type
)
208 /* for compatibility with older oroms convert MIGR_REPAIR, into
209 * MIGR_VERIFY w/ DEV_VERIFY_AND_FIX status
211 if (migr_type
== MIGR_REPAIR
) {
212 dev
->vol
.migr_type
= MIGR_VERIFY
;
213 dev
->status
|= DEV_VERIFY_AND_FIX
;
215 dev
->vol
.migr_type
= migr_type
;
216 dev
->status
&= ~DEV_VERIFY_AND_FIX
;
220 static unsigned int sector_count(__u32 bytes
)
222 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
225 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
227 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
231 struct imsm_dev
*dev
;
232 struct intel_dev
*next
;
236 /* internal representation of IMSM metadata */
239 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
240 struct imsm_super
*anchor
; /* immovable parameters */
242 size_t len
; /* size of the 'buf' allocation */
243 void *next_buf
; /* for realloc'ing buf from the manager */
245 int updates_pending
; /* count of pending updates for mdmon */
246 int creating_imsm
; /* flag to indicate container creation */
247 int current_vol
; /* index of raid device undergoing creation */
248 __u32 create_offset
; /* common start for 'current_vol' */
249 __u32 random
; /* random data for seeding new family numbers */
250 struct intel_dev
*devlist
;
254 __u8 serial
[MAX_RAID_SERIAL_LEN
];
257 struct imsm_disk disk
;
260 struct extent
*e
; /* for determining freespace @ create */
261 int raiddisk
; /* slot to fill in autolayout */
263 struct dl
*add
; /* list of disks to add while mdmon active */
264 struct dl
*missing
; /* disks removed while we weren't looking */
265 struct bbm_log
*bbm_log
;
266 const char *hba
; /* device path of the raid controller for this metadata */
267 const struct imsm_orom
*orom
; /* platform firmware support */
268 struct intel_super
*next
; /* (temp) list for disambiguating family_num */
272 struct imsm_disk disk
;
273 #define IMSM_UNKNOWN_OWNER (-1)
275 struct intel_disk
*next
;
279 unsigned long long start
, size
;
282 /* definition of messages passed to imsm_process_update */
283 enum imsm_update_type
{
284 update_activate_spare
,
289 struct imsm_update_activate_spare
{
290 enum imsm_update_type type
;
294 struct imsm_update_activate_spare
*next
;
298 __u8 serial
[MAX_RAID_SERIAL_LEN
];
301 struct imsm_update_create_array
{
302 enum imsm_update_type type
;
307 struct imsm_update_add_disk
{
308 enum imsm_update_type type
;
311 static struct supertype
*match_metadata_desc_imsm(char *arg
)
313 struct supertype
*st
;
315 if (strcmp(arg
, "imsm") != 0 &&
316 strcmp(arg
, "default") != 0
320 st
= malloc(sizeof(*st
));
321 memset(st
, 0, sizeof(*st
));
322 st
->ss
= &super_imsm
;
323 st
->max_devs
= IMSM_MAX_DEVICES
;
324 st
->minor_version
= 0;
330 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
332 return &mpb
->sig
[MPB_SIG_LEN
];
336 /* retrieve a disk directly from the anchor when the anchor is known to be
337 * up-to-date, currently only at load time
339 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
341 if (index
>= mpb
->num_disks
)
343 return &mpb
->disk
[index
];
347 /* retrieve a disk from the parsed metadata */
348 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
352 for (d
= super
->disks
; d
; d
= d
->next
)
353 if (d
->index
== index
)
360 /* generate a checksum directly from the anchor when the anchor is known to be
361 * up-to-date, currently only at load or write_super after coalescing
363 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
365 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
366 __u32
*p
= (__u32
*) mpb
;
370 sum
+= __le32_to_cpu(*p
);
374 return sum
- __le32_to_cpu(mpb
->check_sum
);
377 static size_t sizeof_imsm_map(struct imsm_map
*map
)
379 return sizeof(struct imsm_map
) + sizeof(__u32
) * (map
->num_members
- 1);
382 struct imsm_map
*get_imsm_map(struct imsm_dev
*dev
, int second_map
)
384 struct imsm_map
*map
= &dev
->vol
.map
[0];
386 if (second_map
&& !dev
->vol
.migr_state
)
388 else if (second_map
) {
391 return ptr
+ sizeof_imsm_map(map
);
397 /* return the size of the device.
398 * migr_state increases the returned size if map[0] were to be duplicated
400 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
, int migr_state
)
402 size_t size
= sizeof(*dev
) - sizeof(struct imsm_map
) +
403 sizeof_imsm_map(get_imsm_map(dev
, 0));
405 /* migrating means an additional map */
406 if (dev
->vol
.migr_state
)
407 size
+= sizeof_imsm_map(get_imsm_map(dev
, 1));
409 size
+= sizeof_imsm_map(get_imsm_map(dev
, 0));
415 /* retrieve disk serial number list from a metadata update */
416 static struct disk_info
*get_disk_info(struct imsm_update_create_array
*update
)
419 struct disk_info
*inf
;
421 inf
= u
+ sizeof(*update
) - sizeof(struct imsm_dev
) +
422 sizeof_imsm_dev(&update
->dev
, 0);
428 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
434 if (index
>= mpb
->num_raid_devs
)
437 /* devices start after all disks */
438 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
440 for (i
= 0; i
<= index
; i
++)
442 return _mpb
+ offset
;
444 offset
+= sizeof_imsm_dev(_mpb
+ offset
, 0);
449 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
451 struct intel_dev
*dv
;
453 if (index
>= super
->anchor
->num_raid_devs
)
455 for (dv
= super
->devlist
; dv
; dv
= dv
->next
)
456 if (dv
->index
== index
)
461 static __u32
get_imsm_ord_tbl_ent(struct imsm_dev
*dev
, int slot
)
463 struct imsm_map
*map
;
465 if (dev
->vol
.migr_state
)
466 map
= get_imsm_map(dev
, 1);
468 map
= get_imsm_map(dev
, 0);
470 /* top byte identifies disk under rebuild */
471 return __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
474 #define ord_to_idx(ord) (((ord) << 8) >> 8)
475 static __u32
get_imsm_disk_idx(struct imsm_dev
*dev
, int slot
)
477 __u32 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
479 return ord_to_idx(ord
);
482 static void set_imsm_ord_tbl_ent(struct imsm_map
*map
, int slot
, __u32 ord
)
484 map
->disk_ord_tbl
[slot
] = __cpu_to_le32(ord
);
487 static int get_imsm_disk_slot(struct imsm_map
*map
, int idx
)
492 for (slot
= 0; slot
< map
->num_members
; slot
++) {
493 ord
= __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
494 if (ord_to_idx(ord
) == idx
)
501 static int get_imsm_raid_level(struct imsm_map
*map
)
503 if (map
->raid_level
== 1) {
504 if (map
->num_members
== 2)
510 return map
->raid_level
;
513 static int cmp_extent(const void *av
, const void *bv
)
515 const struct extent
*a
= av
;
516 const struct extent
*b
= bv
;
517 if (a
->start
< b
->start
)
519 if (a
->start
> b
->start
)
524 static int count_memberships(struct dl
*dl
, struct intel_super
*super
)
529 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
530 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
531 struct imsm_map
*map
= get_imsm_map(dev
, 0);
533 if (get_imsm_disk_slot(map
, dl
->index
) >= 0)
540 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
542 /* find a list of used extents on the given physical device */
543 struct extent
*rv
, *e
;
545 int memberships
= count_memberships(dl
, super
);
546 __u32 reservation
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
548 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
553 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
554 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
555 struct imsm_map
*map
= get_imsm_map(dev
, 0);
557 if (get_imsm_disk_slot(map
, dl
->index
) >= 0) {
558 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
559 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
563 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
565 /* determine the start of the metadata
566 * when no raid devices are defined use the default
567 * ...otherwise allow the metadata to truncate the value
568 * as is the case with older versions of imsm
571 struct extent
*last
= &rv
[memberships
- 1];
574 remainder
= __le32_to_cpu(dl
->disk
.total_blocks
) -
575 (last
->start
+ last
->size
);
576 /* round down to 1k block to satisfy precision of the kernel
580 /* make sure remainder is still sane */
581 if (remainder
< ROUND_UP(super
->len
, 512) >> 9)
582 remainder
= ROUND_UP(super
->len
, 512) >> 9;
583 if (reservation
> remainder
)
584 reservation
= remainder
;
586 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) - reservation
;
591 /* try to determine how much space is reserved for metadata from
592 * the last get_extents() entry, otherwise fallback to the
595 static __u32
imsm_reserved_sectors(struct intel_super
*super
, struct dl
*dl
)
601 /* for spares just return a minimal reservation which will grow
602 * once the spare is picked up by an array
605 return MPB_SECTOR_CNT
;
607 e
= get_extents(super
, dl
);
609 return MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
611 /* scroll to last entry */
612 for (i
= 0; e
[i
].size
; i
++)
615 rv
= __le32_to_cpu(dl
->disk
.total_blocks
) - e
[i
].start
;
622 static int is_spare(struct imsm_disk
*disk
)
624 return (disk
->status
& SPARE_DISK
) == SPARE_DISK
;
627 static int is_configured(struct imsm_disk
*disk
)
629 return (disk
->status
& CONFIGURED_DISK
) == CONFIGURED_DISK
;
632 static int is_failed(struct imsm_disk
*disk
)
634 return (disk
->status
& FAILED_DISK
) == FAILED_DISK
;
638 static __u64
blocks_per_migr_unit(struct imsm_dev
*dev
);
640 static void print_imsm_dev(struct imsm_dev
*dev
, char *uuid
, int disk_idx
)
644 struct imsm_map
*map
= get_imsm_map(dev
, 0);
648 printf("[%.16s]:\n", dev
->volume
);
649 printf(" UUID : %s\n", uuid
);
650 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
651 printf(" Members : %d\n", map
->num_members
);
652 slot
= get_imsm_disk_slot(map
, disk_idx
);
654 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
655 printf(" This Slot : %d%s\n", slot
,
656 ord
& IMSM_ORD_REBUILD
? " (out-of-sync)" : "");
658 printf(" This Slot : ?\n");
659 sz
= __le32_to_cpu(dev
->size_high
);
661 sz
+= __le32_to_cpu(dev
->size_low
);
662 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
663 human_size(sz
* 512));
664 sz
= __le32_to_cpu(map
->blocks_per_member
);
665 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
666 human_size(sz
* 512));
667 printf(" Sector Offset : %u\n",
668 __le32_to_cpu(map
->pba_of_lba0
));
669 printf(" Num Stripes : %u\n",
670 __le32_to_cpu(map
->num_data_stripes
));
671 printf(" Chunk Size : %u KiB\n",
672 __le16_to_cpu(map
->blocks_per_strip
) / 2);
673 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
674 printf(" Migrate State : ");
675 if (dev
->vol
.migr_state
) {
676 if (migr_type(dev
) == MIGR_INIT
)
677 printf("initialize\n");
678 else if (migr_type(dev
) == MIGR_REBUILD
)
680 else if (migr_type(dev
) == MIGR_VERIFY
)
682 else if (migr_type(dev
) == MIGR_GEN_MIGR
)
683 printf("general migration\n");
684 else if (migr_type(dev
) == MIGR_STATE_CHANGE
)
685 printf("state change\n");
686 else if (migr_type(dev
) == MIGR_REPAIR
)
689 printf("<unknown:%d>\n", migr_type(dev
));
692 printf(" Map State : %s", map_state_str
[map
->map_state
]);
693 if (dev
->vol
.migr_state
) {
694 struct imsm_map
*map
= get_imsm_map(dev
, 1);
696 printf(" <-- %s", map_state_str
[map
->map_state
]);
697 printf("\n Checkpoint : %u (%llu)",
698 __le32_to_cpu(dev
->vol
.curr_migr_unit
),
699 blocks_per_migr_unit(dev
));
702 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
705 static void print_imsm_disk(struct imsm_super
*mpb
, int index
, __u32 reserved
)
707 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
708 char str
[MAX_RAID_SERIAL_LEN
+ 1];
715 snprintf(str
, MAX_RAID_SERIAL_LEN
+ 1, "%s", disk
->serial
);
716 printf(" Disk%02d Serial : %s\n", index
, str
);
717 printf(" State :%s%s%s\n", is_spare(disk
) ? " spare" : "",
718 is_configured(disk
) ? " active" : "",
719 is_failed(disk
) ? " failed" : "");
720 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
721 sz
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
722 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
723 human_size(sz
* 512));
726 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
);
728 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
730 struct intel_super
*super
= st
->sb
;
731 struct imsm_super
*mpb
= super
->anchor
;
732 char str
[MAX_SIGNATURE_LENGTH
];
737 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
740 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
741 printf(" Magic : %s\n", str
);
742 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
743 printf(" Version : %s\n", get_imsm_version(mpb
));
744 printf(" Orig Family : %08x\n", __le32_to_cpu(mpb
->orig_family_num
));
745 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
746 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
747 getinfo_super_imsm(st
, &info
);
748 fname_from_uuid(st
, &info
, nbuf
, ':');
749 printf(" UUID : %s\n", nbuf
+ 5);
750 sum
= __le32_to_cpu(mpb
->check_sum
);
751 printf(" Checksum : %08x %s\n", sum
,
752 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
753 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
754 printf(" Disks : %d\n", mpb
->num_disks
);
755 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
756 print_imsm_disk(mpb
, super
->disks
->index
, reserved
);
757 if (super
->bbm_log
) {
758 struct bbm_log
*log
= super
->bbm_log
;
761 printf("Bad Block Management Log:\n");
762 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
763 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
764 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
765 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
766 printf(" First Spare : %llx\n",
767 (unsigned long long) __le64_to_cpu(log
->first_spare_lba
));
769 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
771 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
773 super
->current_vol
= i
;
774 getinfo_super_imsm(st
, &info
);
775 fname_from_uuid(st
, &info
, nbuf
, ':');
776 print_imsm_dev(dev
, nbuf
+ 5, super
->disks
->index
);
778 for (i
= 0; i
< mpb
->num_disks
; i
++) {
779 if (i
== super
->disks
->index
)
781 print_imsm_disk(mpb
, i
, reserved
);
785 static void brief_examine_super_imsm(struct supertype
*st
, int verbose
)
787 /* We just write a generic IMSM ARRAY entry */
790 struct intel_super
*super
= st
->sb
;
792 if (!super
->anchor
->num_raid_devs
) {
793 printf("ARRAY metadata=imsm\n");
797 getinfo_super_imsm(st
, &info
);
798 fname_from_uuid(st
, &info
, nbuf
, ':');
799 printf("ARRAY metadata=imsm UUID=%s\n", nbuf
+ 5);
802 static void brief_examine_subarrays_imsm(struct supertype
*st
, int verbose
)
804 /* We just write a generic IMSM ARRAY entry */
808 struct intel_super
*super
= st
->sb
;
811 if (!super
->anchor
->num_raid_devs
)
814 getinfo_super_imsm(st
, &info
);
815 fname_from_uuid(st
, &info
, nbuf
, ':');
816 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
817 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
819 super
->current_vol
= i
;
820 getinfo_super_imsm(st
, &info
);
821 fname_from_uuid(st
, &info
, nbuf1
, ':');
822 printf("ARRAY /dev/md/%.16s container=%s member=%d UUID=%s\n",
823 dev
->volume
, nbuf
+ 5, i
, nbuf1
+ 5);
827 static void export_examine_super_imsm(struct supertype
*st
)
829 struct intel_super
*super
= st
->sb
;
830 struct imsm_super
*mpb
= super
->anchor
;
834 getinfo_super_imsm(st
, &info
);
835 fname_from_uuid(st
, &info
, nbuf
, ':');
836 printf("MD_METADATA=imsm\n");
837 printf("MD_LEVEL=container\n");
838 printf("MD_UUID=%s\n", nbuf
+5);
839 printf("MD_DEVICES=%u\n", mpb
->num_disks
);
842 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
847 getinfo_super_imsm(st
, &info
);
848 fname_from_uuid(st
, &info
, nbuf
, ':');
849 printf("\n UUID : %s\n", nbuf
+ 5);
852 static void brief_detail_super_imsm(struct supertype
*st
)
856 getinfo_super_imsm(st
, &info
);
857 fname_from_uuid(st
, &info
, nbuf
, ':');
858 printf(" UUID=%s", nbuf
+ 5);
861 static int imsm_read_serial(int fd
, char *devname
, __u8
*serial
);
862 static void fd2devname(int fd
, char *name
);
864 static int imsm_enumerate_ports(const char *hba_path
, int port_count
, int host_base
, int verbose
)
866 /* dump an unsorted list of devices attached to ahci, as well as
867 * non-connected ports
869 int hba_len
= strlen(hba_path
) + 1;
874 unsigned long port_mask
= (1 << port_count
) - 1;
876 if (port_count
> sizeof(port_mask
) * 8) {
878 fprintf(stderr
, Name
": port_count %d out of range\n", port_count
);
882 /* scroll through /sys/dev/block looking for devices attached to
885 dir
= opendir("/sys/dev/block");
886 for (ent
= dir
? readdir(dir
) : NULL
; ent
; ent
= readdir(dir
)) {
897 if (sscanf(ent
->d_name
, "%d:%d", &major
, &minor
) != 2)
899 path
= devt_to_devpath(makedev(major
, minor
));
902 if (!path_attached_to_hba(path
, hba_path
)) {
908 /* retrieve the scsi device type */
909 if (asprintf(&device
, "/sys/dev/block/%d:%d/device/xxxxxxx", major
, minor
) < 0) {
911 fprintf(stderr
, Name
": failed to allocate 'device'\n");
915 sprintf(device
, "/sys/dev/block/%d:%d/device/type", major
, minor
);
916 if (load_sys(device
, buf
) != 0) {
918 fprintf(stderr
, Name
": failed to read device type for %s\n",
924 type
= strtoul(buf
, NULL
, 10);
926 /* if it's not a disk print the vendor and model */
927 if (!(type
== 0 || type
== 7 || type
== 14)) {
930 sprintf(device
, "/sys/dev/block/%d:%d/device/vendor", major
, minor
);
931 if (load_sys(device
, buf
) == 0) {
932 strncpy(vendor
, buf
, sizeof(vendor
));
933 vendor
[sizeof(vendor
) - 1] = '\0';
934 c
= (char *) &vendor
[sizeof(vendor
) - 1];
935 while (isspace(*c
) || *c
== '\0')
939 sprintf(device
, "/sys/dev/block/%d:%d/device/model", major
, minor
);
940 if (load_sys(device
, buf
) == 0) {
941 strncpy(model
, buf
, sizeof(model
));
942 model
[sizeof(model
) - 1] = '\0';
943 c
= (char *) &model
[sizeof(model
) - 1];
944 while (isspace(*c
) || *c
== '\0')
948 if (vendor
[0] && model
[0])
949 sprintf(buf
, "%.64s %.64s", vendor
, model
);
951 switch (type
) { /* numbers from hald/linux/device.c */
952 case 1: sprintf(buf
, "tape"); break;
953 case 2: sprintf(buf
, "printer"); break;
954 case 3: sprintf(buf
, "processor"); break;
956 case 5: sprintf(buf
, "cdrom"); break;
957 case 6: sprintf(buf
, "scanner"); break;
958 case 8: sprintf(buf
, "media_changer"); break;
959 case 9: sprintf(buf
, "comm"); break;
960 case 12: sprintf(buf
, "raid"); break;
961 default: sprintf(buf
, "unknown");
967 /* chop device path to 'host%d' and calculate the port number */
968 c
= strchr(&path
[hba_len
], '/');
970 if (sscanf(&path
[hba_len
], "host%d", &port
) == 1)
974 *c
= '/'; /* repair the full string */
975 fprintf(stderr
, Name
": failed to determine port number for %s\n",
982 /* mark this port as used */
983 port_mask
&= ~(1 << port
);
985 /* print out the device information */
987 printf(" Port%d : - non-disk device (%s) -\n", port
, buf
);
991 fd
= dev_open(ent
->d_name
, O_RDONLY
);
993 printf(" Port%d : - disk info unavailable -\n", port
);
996 printf(" Port%d : %s", port
, buf
);
997 if (imsm_read_serial(fd
, NULL
, (__u8
*) buf
) == 0)
998 printf(" (%s)\n", buf
);
1013 for (i
= 0; i
< port_count
; i
++)
1014 if (port_mask
& (1 << i
))
1015 printf(" Port%d : - no device attached -\n", i
);
1021 static int detail_platform_imsm(int verbose
, int enumerate_only
)
1023 /* There are two components to imsm platform support, the ahci SATA
1024 * controller and the option-rom. To find the SATA controller we
1025 * simply look in /sys/bus/pci/drivers/ahci to see if an ahci
1026 * controller with the Intel vendor id is present. This approach
1027 * allows mdadm to leverage the kernel's ahci detection logic, with the
1028 * caveat that if ahci.ko is not loaded mdadm will not be able to
1029 * detect platform raid capabilities. The option-rom resides in a
1030 * platform "Adapter ROM". We scan for its signature to retrieve the
1031 * platform capabilities. If raid support is disabled in the BIOS the
1032 * option-rom capability structure will not be available.
1034 const struct imsm_orom
*orom
;
1035 struct sys_dev
*list
, *hba
;
1038 const char *hba_path
;
1042 if (enumerate_only
) {
1043 if (check_env("IMSM_NO_PLATFORM") || find_imsm_orom())
1048 list
= find_driver_devices("pci", "ahci");
1049 for (hba
= list
; hba
; hba
= hba
->next
)
1050 if (devpath_to_vendor(hba
->path
) == 0x8086)
1055 fprintf(stderr
, Name
": unable to find active ahci controller\n");
1056 free_sys_dev(&list
);
1059 fprintf(stderr
, Name
": found Intel SATA AHCI Controller\n");
1060 hba_path
= hba
->path
;
1062 free_sys_dev(&list
);
1064 orom
= find_imsm_orom();
1067 fprintf(stderr
, Name
": imsm option-rom not found\n");
1071 printf(" Platform : Intel(R) Matrix Storage Manager\n");
1072 printf(" Version : %d.%d.%d.%d\n", orom
->major_ver
, orom
->minor_ver
,
1073 orom
->hotfix_ver
, orom
->build
);
1074 printf(" RAID Levels :%s%s%s%s%s\n",
1075 imsm_orom_has_raid0(orom
) ? " raid0" : "",
1076 imsm_orom_has_raid1(orom
) ? " raid1" : "",
1077 imsm_orom_has_raid1e(orom
) ? " raid1e" : "",
1078 imsm_orom_has_raid10(orom
) ? " raid10" : "",
1079 imsm_orom_has_raid5(orom
) ? " raid5" : "");
1080 printf(" Chunk Sizes :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
1081 imsm_orom_has_chunk(orom
, 2) ? " 2k" : "",
1082 imsm_orom_has_chunk(orom
, 4) ? " 4k" : "",
1083 imsm_orom_has_chunk(orom
, 8) ? " 8k" : "",
1084 imsm_orom_has_chunk(orom
, 16) ? " 16k" : "",
1085 imsm_orom_has_chunk(orom
, 32) ? " 32k" : "",
1086 imsm_orom_has_chunk(orom
, 64) ? " 64k" : "",
1087 imsm_orom_has_chunk(orom
, 128) ? " 128k" : "",
1088 imsm_orom_has_chunk(orom
, 256) ? " 256k" : "",
1089 imsm_orom_has_chunk(orom
, 512) ? " 512k" : "",
1090 imsm_orom_has_chunk(orom
, 1024*1) ? " 1M" : "",
1091 imsm_orom_has_chunk(orom
, 1024*2) ? " 2M" : "",
1092 imsm_orom_has_chunk(orom
, 1024*4) ? " 4M" : "",
1093 imsm_orom_has_chunk(orom
, 1024*8) ? " 8M" : "",
1094 imsm_orom_has_chunk(orom
, 1024*16) ? " 16M" : "",
1095 imsm_orom_has_chunk(orom
, 1024*32) ? " 32M" : "",
1096 imsm_orom_has_chunk(orom
, 1024*64) ? " 64M" : "");
1097 printf(" Max Disks : %d\n", orom
->tds
);
1098 printf(" Max Volumes : %d\n", orom
->vpa
);
1099 printf(" I/O Controller : %s\n", hba_path
);
1101 /* find the smallest scsi host number to determine a port number base */
1102 dir
= opendir(hba_path
);
1103 for (ent
= dir
? readdir(dir
) : NULL
; ent
; ent
= readdir(dir
)) {
1106 if (sscanf(ent
->d_name
, "host%d", &host
) != 1)
1108 if (port_count
== 0)
1110 else if (host
< host_base
)
1113 if (host
+ 1 > port_count
+ host_base
)
1114 port_count
= host
+ 1 - host_base
;
1120 if (!port_count
|| imsm_enumerate_ports(hba_path
, port_count
,
1121 host_base
, verbose
) != 0) {
1123 fprintf(stderr
, Name
": failed to enumerate ports\n");
1131 static int match_home_imsm(struct supertype
*st
, char *homehost
)
1133 /* the imsm metadata format does not specify any host
1134 * identification information. We return -1 since we can never
1135 * confirm nor deny whether a given array is "meant" for this
1136 * host. We rely on compare_super and the 'family_num' fields to
1137 * exclude member disks that do not belong, and we rely on
1138 * mdadm.conf to specify the arrays that should be assembled.
1139 * Auto-assembly may still pick up "foreign" arrays.
1145 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
1147 /* The uuid returned here is used for:
1148 * uuid to put into bitmap file (Create, Grow)
1149 * uuid for backup header when saving critical section (Grow)
1150 * comparing uuids when re-adding a device into an array
1151 * In these cases the uuid required is that of the data-array,
1152 * not the device-set.
1153 * uuid to recognise same set when adding a missing device back
1154 * to an array. This is a uuid for the device-set.
1156 * For each of these we can make do with a truncated
1157 * or hashed uuid rather than the original, as long as
1159 * In each case the uuid required is that of the data-array,
1160 * not the device-set.
1162 /* imsm does not track uuid's so we synthesis one using sha1 on
1163 * - The signature (Which is constant for all imsm array, but no matter)
1164 * - the orig_family_num of the container
1165 * - the index number of the volume
1166 * - the 'serial' number of the volume.
1167 * Hopefully these are all constant.
1169 struct intel_super
*super
= st
->sb
;
1172 struct sha1_ctx ctx
;
1173 struct imsm_dev
*dev
= NULL
;
1176 /* some mdadm versions failed to set ->orig_family_num, in which
1177 * case fall back to ->family_num. orig_family_num will be
1178 * fixed up with the first metadata update.
1180 family_num
= super
->anchor
->orig_family_num
;
1181 if (family_num
== 0)
1182 family_num
= super
->anchor
->family_num
;
1183 sha1_init_ctx(&ctx
);
1184 sha1_process_bytes(super
->anchor
->sig
, MPB_SIG_LEN
, &ctx
);
1185 sha1_process_bytes(&family_num
, sizeof(__u32
), &ctx
);
1186 if (super
->current_vol
>= 0)
1187 dev
= get_imsm_dev(super
, super
->current_vol
);
1189 __u32 vol
= super
->current_vol
;
1190 sha1_process_bytes(&vol
, sizeof(vol
), &ctx
);
1191 sha1_process_bytes(dev
->volume
, MAX_RAID_SERIAL_LEN
, &ctx
);
1193 sha1_finish_ctx(&ctx
, buf
);
1194 memcpy(uuid
, buf
, 4*4);
1199 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
1201 __u8
*v
= get_imsm_version(mpb
);
1202 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
1203 char major
[] = { 0, 0, 0 };
1204 char minor
[] = { 0 ,0, 0 };
1205 char patch
[] = { 0, 0, 0 };
1206 char *ver_parse
[] = { major
, minor
, patch
};
1210 while (*v
!= '\0' && v
< end
) {
1211 if (*v
!= '.' && j
< 2)
1212 ver_parse
[i
][j
++] = *v
;
1220 *m
= strtol(minor
, NULL
, 0);
1221 *p
= strtol(patch
, NULL
, 0);
1225 static __u32
migr_strip_blocks_resync(struct imsm_dev
*dev
)
1227 /* migr_strip_size when repairing or initializing parity */
1228 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1229 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
1231 switch (get_imsm_raid_level(map
)) {
1236 return 128*1024 >> 9;
1240 static __u32
migr_strip_blocks_rebuild(struct imsm_dev
*dev
)
1242 /* migr_strip_size when rebuilding a degraded disk, no idea why
1243 * this is different than migr_strip_size_resync(), but it's good
1246 struct imsm_map
*map
= get_imsm_map(dev
, 1);
1247 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
1249 switch (get_imsm_raid_level(map
)) {
1252 if (map
->num_members
% map
->num_domains
== 0)
1253 return 128*1024 >> 9;
1257 return max((__u32
) 64*1024 >> 9, chunk
);
1259 return 128*1024 >> 9;
1263 static __u32
num_stripes_per_unit_resync(struct imsm_dev
*dev
)
1265 struct imsm_map
*lo
= get_imsm_map(dev
, 0);
1266 struct imsm_map
*hi
= get_imsm_map(dev
, 1);
1267 __u32 lo_chunk
= __le32_to_cpu(lo
->blocks_per_strip
);
1268 __u32 hi_chunk
= __le32_to_cpu(hi
->blocks_per_strip
);
1270 return max((__u32
) 1, hi_chunk
/ lo_chunk
);
1273 static __u32
num_stripes_per_unit_rebuild(struct imsm_dev
*dev
)
1275 struct imsm_map
*lo
= get_imsm_map(dev
, 0);
1276 int level
= get_imsm_raid_level(lo
);
1278 if (level
== 1 || level
== 10) {
1279 struct imsm_map
*hi
= get_imsm_map(dev
, 1);
1281 return hi
->num_domains
;
1283 return num_stripes_per_unit_resync(dev
);
1286 static __u8
imsm_num_data_members(struct imsm_dev
*dev
)
1288 /* named 'imsm_' because raid0, raid1 and raid10
1289 * counter-intuitively have the same number of data disks
1291 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1293 switch (get_imsm_raid_level(map
)) {
1297 return map
->num_members
;
1299 return map
->num_members
- 1;
1301 dprintf("%s: unsupported raid level\n", __func__
);
1306 static __u32
parity_segment_depth(struct imsm_dev
*dev
)
1308 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1309 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
1311 switch(get_imsm_raid_level(map
)) {
1314 return chunk
* map
->num_domains
;
1316 return chunk
* map
->num_members
;
1322 static __u32
map_migr_block(struct imsm_dev
*dev
, __u32 block
)
1324 struct imsm_map
*map
= get_imsm_map(dev
, 1);
1325 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
1326 __u32 strip
= block
/ chunk
;
1328 switch (get_imsm_raid_level(map
)) {
1331 __u32 vol_strip
= (strip
* map
->num_domains
) + 1;
1332 __u32 vol_stripe
= vol_strip
/ map
->num_members
;
1334 return vol_stripe
* chunk
+ block
% chunk
;
1336 __u32 stripe
= strip
/ (map
->num_members
- 1);
1338 return stripe
* chunk
+ block
% chunk
;
1345 static __u64
blocks_per_migr_unit(struct imsm_dev
*dev
)
1347 /* calculate the conversion factor between per member 'blocks'
1348 * (md/{resync,rebuild}_start) and imsm migration units, return
1349 * 0 for the 'not migrating' and 'unsupported migration' cases
1351 if (!dev
->vol
.migr_state
)
1354 switch (migr_type(dev
)) {
1358 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1359 __u32 stripes_per_unit
;
1360 __u32 blocks_per_unit
;
1369 /* yes, this is really the translation of migr_units to
1370 * per-member blocks in the 'resync' case
1372 stripes_per_unit
= num_stripes_per_unit_resync(dev
);
1373 migr_chunk
= migr_strip_blocks_resync(dev
);
1374 disks
= imsm_num_data_members(dev
);
1375 blocks_per_unit
= stripes_per_unit
* migr_chunk
* disks
;
1376 stripe
= __le32_to_cpu(map
->blocks_per_strip
) * disks
;
1377 segment
= blocks_per_unit
/ stripe
;
1378 block_rel
= blocks_per_unit
- segment
* stripe
;
1379 parity_depth
= parity_segment_depth(dev
);
1380 block_map
= map_migr_block(dev
, block_rel
);
1381 return block_map
+ parity_depth
* segment
;
1383 case MIGR_REBUILD
: {
1384 __u32 stripes_per_unit
;
1387 stripes_per_unit
= num_stripes_per_unit_rebuild(dev
);
1388 migr_chunk
= migr_strip_blocks_rebuild(dev
);
1389 return migr_chunk
* stripes_per_unit
;
1392 case MIGR_STATE_CHANGE
:
1398 static int imsm_level_to_layout(int level
)
1406 return ALGORITHM_LEFT_ASYMMETRIC
;
1413 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
1415 struct intel_super
*super
= st
->sb
;
1416 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
1417 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1420 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1421 if (dl
->raiddisk
== info
->disk
.raid_disk
)
1423 info
->container_member
= super
->current_vol
;
1424 info
->array
.raid_disks
= map
->num_members
;
1425 info
->array
.level
= get_imsm_raid_level(map
);
1426 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
1427 info
->array
.md_minor
= -1;
1428 info
->array
.ctime
= 0;
1429 info
->array
.utime
= 0;
1430 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1431 info
->array
.state
= !dev
->vol
.dirty
;
1432 info
->custom_array_size
= __le32_to_cpu(dev
->size_high
);
1433 info
->custom_array_size
<<= 32;
1434 info
->custom_array_size
|= __le32_to_cpu(dev
->size_low
);
1436 info
->disk
.major
= 0;
1437 info
->disk
.minor
= 0;
1439 info
->disk
.major
= dl
->major
;
1440 info
->disk
.minor
= dl
->minor
;
1443 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1444 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1445 memset(info
->uuid
, 0, sizeof(info
->uuid
));
1447 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
) {
1448 info
->resync_start
= 0;
1449 } else if (dev
->vol
.migr_state
) {
1450 switch (migr_type(dev
)) {
1453 __u64 blocks_per_unit
= blocks_per_migr_unit(dev
);
1454 __u64 units
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
1456 info
->resync_start
= blocks_per_unit
* units
;
1460 /* we could emulate the checkpointing of
1461 * 'sync_action=check' migrations, but for now
1462 * we just immediately complete them
1465 /* this is handled by container_content_imsm() */
1467 case MIGR_STATE_CHANGE
:
1468 /* FIXME handle other migrations */
1470 /* we are not dirty, so... */
1471 info
->resync_start
= MaxSector
;
1474 info
->resync_start
= MaxSector
;
1476 strncpy(info
->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1477 info
->name
[MAX_RAID_SERIAL_LEN
] = 0;
1479 info
->array
.major_version
= -1;
1480 info
->array
.minor_version
= -2;
1481 sprintf(info
->text_version
, "/%s/%d",
1482 devnum2devname(st
->container_dev
),
1483 info
->container_member
);
1484 info
->safe_mode_delay
= 4000; /* 4 secs like the Matrix driver */
1485 uuid_from_super_imsm(st
, info
->uuid
);
1488 /* check the config file to see if we can return a real uuid for this spare */
1489 static void fixup_container_spare_uuid(struct mdinfo
*inf
)
1491 struct mddev_ident_s
*array_list
;
1493 if (inf
->array
.level
!= LEVEL_CONTAINER
||
1494 memcmp(inf
->uuid
, uuid_match_any
, sizeof(int[4])) != 0)
1497 array_list
= conf_get_ident(NULL
);
1499 for (; array_list
; array_list
= array_list
->next
) {
1500 if (array_list
->uuid_set
) {
1501 struct supertype
*_sst
; /* spare supertype */
1502 struct supertype
*_cst
; /* container supertype */
1504 _cst
= array_list
->st
;
1506 _sst
= _cst
->ss
->match_metadata_desc(inf
->text_version
);
1511 memcpy(inf
->uuid
, array_list
->uuid
, sizeof(int[4]));
1519 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
1521 struct intel_super
*super
= st
->sb
;
1522 struct imsm_disk
*disk
;
1524 if (super
->current_vol
>= 0) {
1525 getinfo_super_imsm_volume(st
, info
);
1529 /* Set raid_disks to zero so that Assemble will always pull in valid
1532 info
->array
.raid_disks
= 0;
1533 info
->array
.level
= LEVEL_CONTAINER
;
1534 info
->array
.layout
= 0;
1535 info
->array
.md_minor
= -1;
1536 info
->array
.ctime
= 0; /* N/A for imsm */
1537 info
->array
.utime
= 0;
1538 info
->array
.chunk_size
= 0;
1540 info
->disk
.major
= 0;
1541 info
->disk
.minor
= 0;
1542 info
->disk
.raid_disk
= -1;
1543 info
->reshape_active
= 0;
1544 info
->array
.major_version
= -1;
1545 info
->array
.minor_version
= -2;
1546 strcpy(info
->text_version
, "imsm");
1547 info
->safe_mode_delay
= 0;
1548 info
->disk
.number
= -1;
1549 info
->disk
.state
= 0;
1553 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
1555 disk
= &super
->disks
->disk
;
1556 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
1557 info
->component_size
= reserved
;
1558 info
->disk
.state
= is_configured(disk
) ? (1 << MD_DISK_ACTIVE
) : 0;
1559 /* we don't change info->disk.raid_disk here because
1560 * this state will be finalized in mdmon after we have
1561 * found the 'most fresh' version of the metadata
1563 info
->disk
.state
|= is_failed(disk
) ? (1 << MD_DISK_FAULTY
) : 0;
1564 info
->disk
.state
|= is_spare(disk
) ? 0 : (1 << MD_DISK_SYNC
);
1567 /* only call uuid_from_super_imsm when this disk is part of a populated container,
1568 * ->compare_super may have updated the 'num_raid_devs' field for spares
1570 if (info
->disk
.state
& (1 << MD_DISK_SYNC
) || super
->anchor
->num_raid_devs
)
1571 uuid_from_super_imsm(st
, info
->uuid
);
1573 memcpy(info
->uuid
, uuid_match_any
, sizeof(int[4]));
1574 fixup_container_spare_uuid(info
);
1578 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
1579 char *update
, char *devname
, int verbose
,
1580 int uuid_set
, char *homehost
)
1582 /* For 'assemble' and 'force' we need to return non-zero if any
1583 * change was made. For others, the return value is ignored.
1584 * Update options are:
1585 * force-one : This device looks a bit old but needs to be included,
1586 * update age info appropriately.
1587 * assemble: clear any 'faulty' flag to allow this device to
1589 * force-array: Array is degraded but being forced, mark it clean
1590 * if that will be needed to assemble it.
1592 * newdev: not used ????
1593 * grow: Array has gained a new device - this is currently for
1595 * resync: mark as dirty so a resync will happen.
1596 * name: update the name - preserving the homehost
1597 * uuid: Change the uuid of the array to match watch is given
1599 * Following are not relevant for this imsm:
1600 * sparc2.2 : update from old dodgey metadata
1601 * super-minor: change the preferred_minor number
1602 * summaries: update redundant counters.
1603 * homehost: update the recorded homehost
1604 * _reshape_progress: record new reshape_progress position.
1607 struct intel_super
*super
= st
->sb
;
1608 struct imsm_super
*mpb
;
1610 /* we can only update container info */
1611 if (!super
|| super
->current_vol
>= 0 || !super
->anchor
)
1614 mpb
= super
->anchor
;
1616 if (strcmp(update
, "uuid") == 0 && uuid_set
&& !info
->update_private
)
1618 Name
": '--uuid' not supported for imsm metadata\n");
1619 else if (strcmp(update
, "uuid") == 0 && uuid_set
&& info
->update_private
) {
1620 mpb
->orig_family_num
= *((__u32
*) info
->update_private
);
1622 } else if (strcmp(update
, "uuid") == 0) {
1623 __u32
*new_family
= malloc(sizeof(*new_family
));
1625 /* update orig_family_number with the incoming random
1626 * data, report the new effective uuid, and store the
1627 * new orig_family_num for future updates.
1630 memcpy(&mpb
->orig_family_num
, info
->uuid
, sizeof(__u32
));
1631 uuid_from_super_imsm(st
, info
->uuid
);
1632 *new_family
= mpb
->orig_family_num
;
1633 info
->update_private
= new_family
;
1636 } else if (strcmp(update
, "assemble") == 0)
1640 Name
": '--update=%s' not supported for imsm metadata\n",
1643 /* successful update? recompute checksum */
1645 mpb
->check_sum
= __le32_to_cpu(__gen_imsm_checksum(mpb
));
1650 static size_t disks_to_mpb_size(int disks
)
1654 size
= sizeof(struct imsm_super
);
1655 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
1656 size
+= 2 * sizeof(struct imsm_dev
);
1657 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
1658 size
+= (4 - 2) * sizeof(struct imsm_map
);
1659 /* 4 possible disk_ord_tbl's */
1660 size
+= 4 * (disks
- 1) * sizeof(__u32
);
1665 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
1667 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
1670 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
1673 static void free_devlist(struct intel_super
*super
)
1675 struct intel_dev
*dv
;
1677 while (super
->devlist
) {
1678 dv
= super
->devlist
->next
;
1679 free(super
->devlist
->dev
);
1680 free(super
->devlist
);
1681 super
->devlist
= dv
;
1685 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
1687 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
1690 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
1694 * 0 same, or first was empty, and second was copied
1695 * 1 second had wrong number
1697 * 3 wrong other info
1699 struct intel_super
*first
= st
->sb
;
1700 struct intel_super
*sec
= tst
->sb
;
1708 /* if an anchor does not have num_raid_devs set then it is a free
1711 if (first
->anchor
->num_raid_devs
> 0 &&
1712 sec
->anchor
->num_raid_devs
> 0) {
1713 /* Determine if these disks might ever have been
1714 * related. Further disambiguation can only take place
1715 * in load_super_imsm_all
1717 __u32 first_family
= first
->anchor
->orig_family_num
;
1718 __u32 sec_family
= sec
->anchor
->orig_family_num
;
1720 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
,
1721 MAX_SIGNATURE_LENGTH
) != 0)
1724 if (first_family
== 0)
1725 first_family
= first
->anchor
->family_num
;
1726 if (sec_family
== 0)
1727 sec_family
= sec
->anchor
->family_num
;
1729 if (first_family
!= sec_family
)
1735 /* if 'first' is a spare promote it to a populated mpb with sec's
1738 if (first
->anchor
->num_raid_devs
== 0 &&
1739 sec
->anchor
->num_raid_devs
> 0) {
1741 struct intel_dev
*dv
;
1742 struct imsm_dev
*dev
;
1744 /* we need to copy raid device info from sec if an allocation
1745 * fails here we don't associate the spare
1747 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++) {
1748 dv
= malloc(sizeof(*dv
));
1751 dev
= malloc(sizeof_imsm_dev(get_imsm_dev(sec
, i
), 1));
1758 dv
->next
= first
->devlist
;
1759 first
->devlist
= dv
;
1761 if (i
< sec
->anchor
->num_raid_devs
) {
1762 /* allocation failure */
1763 free_devlist(first
);
1764 fprintf(stderr
, "imsm: failed to associate spare\n");
1767 first
->anchor
->num_raid_devs
= sec
->anchor
->num_raid_devs
;
1768 first
->anchor
->orig_family_num
= sec
->anchor
->orig_family_num
;
1769 first
->anchor
->family_num
= sec
->anchor
->family_num
;
1770 memcpy(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
);
1771 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++)
1772 imsm_copy_dev(get_imsm_dev(first
, i
), get_imsm_dev(sec
, i
));
1778 static void fd2devname(int fd
, char *name
)
1787 if (fstat(fd
, &st
) != 0)
1789 sprintf(path
, "/sys/dev/block/%d:%d",
1790 major(st
.st_rdev
), minor(st
.st_rdev
));
1792 rv
= readlink(path
, dname
, sizeof(dname
));
1797 nm
= strrchr(dname
, '/');
1799 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
1802 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
1804 static int imsm_read_serial(int fd
, char *devname
,
1805 __u8 serial
[MAX_RAID_SERIAL_LEN
])
1807 unsigned char scsi_serial
[255];
1816 memset(scsi_serial
, 0, sizeof(scsi_serial
));
1818 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
1820 if (rv
&& check_env("IMSM_DEVNAME_AS_SERIAL")) {
1821 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1822 fd2devname(fd
, (char *) serial
);
1829 Name
": Failed to retrieve serial for %s\n",
1834 rsp_len
= scsi_serial
[3];
1838 Name
": Failed to retrieve serial for %s\n",
1842 rsp_buf
= (char *) &scsi_serial
[4];
1844 /* trim all whitespace and non-printable characters and convert
1847 for (i
= 0, dest
= rsp_buf
; i
< rsp_len
; i
++) {
1850 /* ':' is reserved for use in placeholder serial
1851 * numbers for missing disks
1859 len
= dest
- rsp_buf
;
1862 /* truncate leading characters */
1863 if (len
> MAX_RAID_SERIAL_LEN
) {
1864 dest
+= len
- MAX_RAID_SERIAL_LEN
;
1865 len
= MAX_RAID_SERIAL_LEN
;
1868 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1869 memcpy(serial
, dest
, len
);
1874 static int serialcmp(__u8
*s1
, __u8
*s2
)
1876 return strncmp((char *) s1
, (char *) s2
, MAX_RAID_SERIAL_LEN
);
1879 static void serialcpy(__u8
*dest
, __u8
*src
)
1881 strncpy((char *) dest
, (char *) src
, MAX_RAID_SERIAL_LEN
);
1885 static struct dl
*serial_to_dl(__u8
*serial
, struct intel_super
*super
)
1889 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1890 if (serialcmp(dl
->serial
, serial
) == 0)
1897 static struct imsm_disk
*
1898 __serial_to_disk(__u8
*serial
, struct imsm_super
*mpb
, int *idx
)
1902 for (i
= 0; i
< mpb
->num_disks
; i
++) {
1903 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, i
);
1905 if (serialcmp(disk
->serial
, serial
) == 0) {
1916 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
1918 struct imsm_disk
*disk
;
1923 __u8 serial
[MAX_RAID_SERIAL_LEN
];
1925 rv
= imsm_read_serial(fd
, devname
, serial
);
1930 dl
= calloc(1, sizeof(*dl
));
1934 Name
": failed to allocate disk buffer for %s\n",
1940 dl
->major
= major(stb
.st_rdev
);
1941 dl
->minor
= minor(stb
.st_rdev
);
1942 dl
->next
= super
->disks
;
1943 dl
->fd
= keep_fd
? fd
: -1;
1944 assert(super
->disks
== NULL
);
1946 serialcpy(dl
->serial
, serial
);
1949 fd2devname(fd
, name
);
1951 dl
->devname
= strdup(devname
);
1953 dl
->devname
= strdup(name
);
1955 /* look up this disk's index in the current anchor */
1956 disk
= __serial_to_disk(dl
->serial
, super
->anchor
, &dl
->index
);
1959 /* only set index on disks that are a member of a
1960 * populated contianer, i.e. one with raid_devs
1962 if (is_failed(&dl
->disk
))
1964 else if (is_spare(&dl
->disk
))
1972 /* When migrating map0 contains the 'destination' state while map1
1973 * contains the current state. When not migrating map0 contains the
1974 * current state. This routine assumes that map[0].map_state is set to
1975 * the current array state before being called.
1977 * Migration is indicated by one of the following states
1978 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
1979 * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal
1980 * map1state=unitialized)
1981 * 3/ Repair (Resync) (migr_state=1 migr_type=MIGR_REPAIR map0state=normal
1983 * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
1984 * map1state=degraded)
1986 static void migrate(struct imsm_dev
*dev
, __u8 to_state
, int migr_type
)
1988 struct imsm_map
*dest
;
1989 struct imsm_map
*src
= get_imsm_map(dev
, 0);
1991 dev
->vol
.migr_state
= 1;
1992 set_migr_type(dev
, migr_type
);
1993 dev
->vol
.curr_migr_unit
= 0;
1994 dest
= get_imsm_map(dev
, 1);
1996 /* duplicate and then set the target end state in map[0] */
1997 memcpy(dest
, src
, sizeof_imsm_map(src
));
1998 if (migr_type
== MIGR_REBUILD
) {
2002 for (i
= 0; i
< src
->num_members
; i
++) {
2003 ord
= __le32_to_cpu(src
->disk_ord_tbl
[i
]);
2004 set_imsm_ord_tbl_ent(src
, i
, ord_to_idx(ord
));
2008 src
->map_state
= to_state
;
2011 static void end_migration(struct imsm_dev
*dev
, __u8 map_state
)
2013 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2014 struct imsm_map
*prev
= get_imsm_map(dev
, dev
->vol
.migr_state
);
2017 /* merge any IMSM_ORD_REBUILD bits that were not successfully
2018 * completed in the last migration.
2020 * FIXME add support for online capacity expansion and
2021 * raid-level-migration
2023 for (i
= 0; i
< prev
->num_members
; i
++)
2024 map
->disk_ord_tbl
[i
] |= prev
->disk_ord_tbl
[i
];
2026 dev
->vol
.migr_state
= 0;
2027 dev
->vol
.curr_migr_unit
= 0;
2028 map
->map_state
= map_state
;
2032 static int parse_raid_devices(struct intel_super
*super
)
2035 struct imsm_dev
*dev_new
;
2036 size_t len
, len_migr
;
2037 size_t space_needed
= 0;
2038 struct imsm_super
*mpb
= super
->anchor
;
2040 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
2041 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
2042 struct intel_dev
*dv
;
2044 len
= sizeof_imsm_dev(dev_iter
, 0);
2045 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
2047 space_needed
+= len_migr
- len
;
2049 dv
= malloc(sizeof(*dv
));
2052 dev_new
= malloc(len_migr
);
2057 imsm_copy_dev(dev_new
, dev_iter
);
2060 dv
->next
= super
->devlist
;
2061 super
->devlist
= dv
;
2064 /* ensure that super->buf is large enough when all raid devices
2067 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
2070 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
2071 if (posix_memalign(&buf
, 512, len
) != 0)
2074 memcpy(buf
, super
->buf
, super
->len
);
2075 memset(buf
+ super
->len
, 0, len
- super
->len
);
2084 /* retrieve a pointer to the bbm log which starts after all raid devices */
2085 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
2089 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
2091 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
2097 static void __free_imsm(struct intel_super
*super
, int free_disks
);
2099 /* load_imsm_mpb - read matrix metadata
2100 * allocates super->mpb to be freed by free_super
2102 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
2104 unsigned long long dsize
;
2105 unsigned long long sectors
;
2107 struct imsm_super
*anchor
;
2110 get_dev_size(fd
, NULL
, &dsize
);
2112 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
2115 Name
": Cannot seek to anchor block on %s: %s\n",
2116 devname
, strerror(errno
));
2120 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
2123 Name
": Failed to allocate imsm anchor buffer"
2124 " on %s\n", devname
);
2127 if (read(fd
, anchor
, 512) != 512) {
2130 Name
": Cannot read anchor block on %s: %s\n",
2131 devname
, strerror(errno
));
2136 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
2139 Name
": no IMSM anchor on %s\n", devname
);
2144 __free_imsm(super
, 0);
2145 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
2146 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
2149 Name
": unable to allocate %zu byte mpb buffer\n",
2154 memcpy(super
->buf
, anchor
, 512);
2156 sectors
= mpb_sectors(anchor
) - 1;
2159 check_sum
= __gen_imsm_checksum(super
->anchor
);
2160 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
2163 Name
": IMSM checksum %x != %x on %s\n",
2165 __le32_to_cpu(super
->anchor
->check_sum
),
2173 /* read the extended mpb */
2174 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
2177 Name
": Cannot seek to extended mpb on %s: %s\n",
2178 devname
, strerror(errno
));
2182 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
2185 Name
": Cannot read extended mpb on %s: %s\n",
2186 devname
, strerror(errno
));
2190 check_sum
= __gen_imsm_checksum(super
->anchor
);
2191 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
2194 Name
": IMSM checksum %x != %x on %s\n",
2195 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
2200 /* FIXME the BBM log is disk specific so we cannot use this global
2201 * buffer for all disks. Ok for now since we only look at the global
2202 * bbm_log_size parameter to gate assembly
2204 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
2210 load_and_parse_mpb(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
2214 err
= load_imsm_mpb(fd
, super
, devname
);
2217 err
= load_imsm_disk(fd
, super
, devname
, keep_fd
);
2220 err
= parse_raid_devices(super
);
2225 static void __free_imsm_disk(struct dl
*d
)
2236 static void free_imsm_disks(struct intel_super
*super
)
2240 while (super
->disks
) {
2242 super
->disks
= d
->next
;
2243 __free_imsm_disk(d
);
2245 while (super
->missing
) {
2247 super
->missing
= d
->next
;
2248 __free_imsm_disk(d
);
2253 /* free all the pieces hanging off of a super pointer */
2254 static void __free_imsm(struct intel_super
*super
, int free_disks
)
2261 free_imsm_disks(super
);
2262 free_devlist(super
);
2264 free((void *) super
->hba
);
2269 static void free_imsm(struct intel_super
*super
)
2271 __free_imsm(super
, 1);
2275 static void free_super_imsm(struct supertype
*st
)
2277 struct intel_super
*super
= st
->sb
;
2286 static struct intel_super
*alloc_super(int creating_imsm
)
2288 struct intel_super
*super
= malloc(sizeof(*super
));
2291 memset(super
, 0, sizeof(*super
));
2292 super
->creating_imsm
= creating_imsm
;
2293 super
->current_vol
= -1;
2294 super
->create_offset
= ~((__u32
) 0);
2295 if (!check_env("IMSM_NO_PLATFORM"))
2296 super
->orom
= find_imsm_orom();
2297 if (super
->orom
&& !check_env("IMSM_TEST_OROM")) {
2298 struct sys_dev
*list
, *ent
;
2300 /* find the first intel ahci controller */
2301 list
= find_driver_devices("pci", "ahci");
2302 for (ent
= list
; ent
; ent
= ent
->next
)
2303 if (devpath_to_vendor(ent
->path
) == 0x8086)
2306 super
->hba
= ent
->path
;
2309 free_sys_dev(&list
);
2317 /* find_missing - helper routine for load_super_imsm_all that identifies
2318 * disks that have disappeared from the system. This routine relies on
2319 * the mpb being uptodate, which it is at load time.
2321 static int find_missing(struct intel_super
*super
)
2324 struct imsm_super
*mpb
= super
->anchor
;
2326 struct imsm_disk
*disk
;
2328 for (i
= 0; i
< mpb
->num_disks
; i
++) {
2329 disk
= __get_imsm_disk(mpb
, i
);
2330 dl
= serial_to_dl(disk
->serial
, super
);
2334 dl
= malloc(sizeof(*dl
));
2340 dl
->devname
= strdup("missing");
2342 serialcpy(dl
->serial
, disk
->serial
);
2345 dl
->next
= super
->missing
;
2346 super
->missing
= dl
;
2352 static struct intel_disk
*disk_list_get(__u8
*serial
, struct intel_disk
*disk_list
)
2354 struct intel_disk
*idisk
= disk_list
;
2357 if (serialcmp(idisk
->disk
.serial
, serial
) == 0)
2359 idisk
= idisk
->next
;
2365 static int __prep_thunderdome(struct intel_super
**table
, int tbl_size
,
2366 struct intel_super
*super
,
2367 struct intel_disk
**disk_list
)
2369 struct imsm_disk
*d
= &super
->disks
->disk
;
2370 struct imsm_super
*mpb
= super
->anchor
;
2373 for (i
= 0; i
< tbl_size
; i
++) {
2374 struct imsm_super
*tbl_mpb
= table
[i
]->anchor
;
2375 struct imsm_disk
*tbl_d
= &table
[i
]->disks
->disk
;
2377 if (tbl_mpb
->family_num
== mpb
->family_num
) {
2378 if (tbl_mpb
->check_sum
== mpb
->check_sum
) {
2379 dprintf("%s: mpb from %d:%d matches %d:%d\n",
2380 __func__
, super
->disks
->major
,
2381 super
->disks
->minor
,
2382 table
[i
]->disks
->major
,
2383 table
[i
]->disks
->minor
);
2387 if (((is_configured(d
) && !is_configured(tbl_d
)) ||
2388 is_configured(d
) == is_configured(tbl_d
)) &&
2389 tbl_mpb
->generation_num
< mpb
->generation_num
) {
2390 /* current version of the mpb is a
2391 * better candidate than the one in
2392 * super_table, but copy over "cross
2393 * generational" status
2395 struct intel_disk
*idisk
;
2397 dprintf("%s: mpb from %d:%d replaces %d:%d\n",
2398 __func__
, super
->disks
->major
,
2399 super
->disks
->minor
,
2400 table
[i
]->disks
->major
,
2401 table
[i
]->disks
->minor
);
2403 idisk
= disk_list_get(tbl_d
->serial
, *disk_list
);
2404 if (idisk
&& is_failed(&idisk
->disk
))
2405 tbl_d
->status
|= FAILED_DISK
;
2408 struct intel_disk
*idisk
;
2409 struct imsm_disk
*disk
;
2411 /* tbl_mpb is more up to date, but copy
2412 * over cross generational status before
2415 disk
= __serial_to_disk(d
->serial
, mpb
, NULL
);
2416 if (disk
&& is_failed(disk
))
2417 d
->status
|= FAILED_DISK
;
2419 idisk
= disk_list_get(d
->serial
, *disk_list
);
2422 if (disk
&& is_configured(disk
))
2423 idisk
->disk
.status
|= CONFIGURED_DISK
;
2426 dprintf("%s: mpb from %d:%d prefer %d:%d\n",
2427 __func__
, super
->disks
->major
,
2428 super
->disks
->minor
,
2429 table
[i
]->disks
->major
,
2430 table
[i
]->disks
->minor
);
2438 table
[tbl_size
++] = super
;
2442 /* update/extend the merged list of imsm_disk records */
2443 for (j
= 0; j
< mpb
->num_disks
; j
++) {
2444 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, j
);
2445 struct intel_disk
*idisk
;
2447 idisk
= disk_list_get(disk
->serial
, *disk_list
);
2449 idisk
->disk
.status
|= disk
->status
;
2450 if (is_configured(&idisk
->disk
) ||
2451 is_failed(&idisk
->disk
))
2452 idisk
->disk
.status
&= ~(SPARE_DISK
);
2454 idisk
= calloc(1, sizeof(*idisk
));
2457 idisk
->owner
= IMSM_UNKNOWN_OWNER
;
2458 idisk
->disk
= *disk
;
2459 idisk
->next
= *disk_list
;
2463 if (serialcmp(idisk
->disk
.serial
, d
->serial
) == 0)
2470 static struct intel_super
*
2471 validate_members(struct intel_super
*super
, struct intel_disk
*disk_list
,
2474 struct imsm_super
*mpb
= super
->anchor
;
2478 for (i
= 0; i
< mpb
->num_disks
; i
++) {
2479 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, i
);
2480 struct intel_disk
*idisk
;
2482 idisk
= disk_list_get(disk
->serial
, disk_list
);
2484 if (idisk
->owner
== owner
||
2485 idisk
->owner
== IMSM_UNKNOWN_OWNER
)
2488 dprintf("%s: '%.16s' owner %d != %d\n",
2489 __func__
, disk
->serial
, idisk
->owner
,
2492 dprintf("%s: unknown disk %x [%d]: %.16s\n",
2493 __func__
, __le32_to_cpu(mpb
->family_num
), i
,
2499 if (ok_count
== mpb
->num_disks
)
2504 static void show_conflicts(__u32 family_num
, struct intel_super
*super_list
)
2506 struct intel_super
*s
;
2508 for (s
= super_list
; s
; s
= s
->next
) {
2509 if (family_num
!= s
->anchor
->family_num
)
2511 fprintf(stderr
, "Conflict, offlining family %#x on '%s'\n",
2512 __le32_to_cpu(family_num
), s
->disks
->devname
);
2516 static struct intel_super
*
2517 imsm_thunderdome(struct intel_super
**super_list
, int len
)
2519 struct intel_super
*super_table
[len
];
2520 struct intel_disk
*disk_list
= NULL
;
2521 struct intel_super
*champion
, *spare
;
2522 struct intel_super
*s
, **del
;
2527 memset(super_table
, 0, sizeof(super_table
));
2528 for (s
= *super_list
; s
; s
= s
->next
)
2529 tbl_size
= __prep_thunderdome(super_table
, tbl_size
, s
, &disk_list
);
2531 for (i
= 0; i
< tbl_size
; i
++) {
2532 struct imsm_disk
*d
;
2533 struct intel_disk
*idisk
;
2534 struct imsm_super
*mpb
= super_table
[i
]->anchor
;
2537 d
= &s
->disks
->disk
;
2539 /* 'd' must appear in merged disk list for its
2540 * configuration to be valid
2542 idisk
= disk_list_get(d
->serial
, disk_list
);
2543 if (idisk
&& idisk
->owner
== i
)
2544 s
= validate_members(s
, disk_list
, i
);
2549 dprintf("%s: marking family: %#x from %d:%d offline\n",
2550 __func__
, mpb
->family_num
,
2551 super_table
[i
]->disks
->major
,
2552 super_table
[i
]->disks
->minor
);
2556 /* This is where the mdadm implementation differs from the Windows
2557 * driver which has no strict concept of a container. We can only
2558 * assemble one family from a container, so when returning a prodigal
2559 * array member to this system the code will not be able to disambiguate
2560 * the container contents that should be assembled ("foreign" versus
2561 * "local"). It requires user intervention to set the orig_family_num
2562 * to a new value to establish a new container. The Windows driver in
2563 * this situation fixes up the volume name in place and manages the
2564 * foreign array as an independent entity.
2569 for (i
= 0; i
< tbl_size
; i
++) {
2570 struct intel_super
*tbl_ent
= super_table
[i
];
2576 if (tbl_ent
->anchor
->num_raid_devs
== 0) {
2581 if (s
&& !is_spare
) {
2582 show_conflicts(tbl_ent
->anchor
->family_num
, *super_list
);
2584 } else if (!s
&& !is_spare
)
2597 fprintf(stderr
, "Chose family %#x on '%s', "
2598 "assemble conflicts to new container with '--update=uuid'\n",
2599 __le32_to_cpu(s
->anchor
->family_num
), s
->disks
->devname
);
2601 /* collect all dl's onto 'champion', and update them to
2602 * champion's version of the status
2604 for (s
= *super_list
; s
; s
= s
->next
) {
2605 struct imsm_super
*mpb
= champion
->anchor
;
2606 struct dl
*dl
= s
->disks
;
2611 for (i
= 0; i
< mpb
->num_disks
; i
++) {
2612 struct imsm_disk
*disk
;
2614 disk
= __serial_to_disk(dl
->serial
, mpb
, &dl
->index
);
2617 /* only set index on disks that are a member of
2618 * a populated contianer, i.e. one with
2621 if (is_failed(&dl
->disk
))
2623 else if (is_spare(&dl
->disk
))
2629 if (i
>= mpb
->num_disks
) {
2630 struct intel_disk
*idisk
;
2632 idisk
= disk_list_get(dl
->serial
, disk_list
);
2633 if (idisk
&& is_spare(&idisk
->disk
) &&
2634 !is_failed(&idisk
->disk
) && !is_configured(&idisk
->disk
))
2642 dl
->next
= champion
->disks
;
2643 champion
->disks
= dl
;
2647 /* delete 'champion' from super_list */
2648 for (del
= super_list
; *del
; ) {
2649 if (*del
== champion
) {
2650 *del
= (*del
)->next
;
2653 del
= &(*del
)->next
;
2655 champion
->next
= NULL
;
2659 struct intel_disk
*idisk
= disk_list
;
2661 disk_list
= disk_list
->next
;
2668 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
2669 char *devname
, int keep_fd
)
2672 struct intel_super
*super_list
= NULL
;
2673 struct intel_super
*super
= NULL
;
2674 int devnum
= fd2devnum(fd
);
2679 enum sysfs_read_flags flags
;
2681 flags
= GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
;
2682 if (mdmon_running(devnum
))
2683 flags
|= SKIP_GONE_DEVS
;
2685 /* check if 'fd' an opened container */
2686 sra
= sysfs_read(fd
, 0, flags
);
2690 if (sra
->array
.major_version
!= -1 ||
2691 sra
->array
.minor_version
!= -2 ||
2692 strcmp(sra
->text_version
, "imsm") != 0)
2696 for (sd
= sra
->devs
, i
= 0; sd
; sd
= sd
->next
, i
++) {
2697 struct intel_super
*s
= alloc_super(0);
2704 s
->next
= super_list
;
2708 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
2709 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
2713 err
= load_and_parse_mpb(dfd
, s
, NULL
, keep_fd
);
2715 /* retry the load if we might have raced against mdmon */
2716 if (err
== 3 && mdmon_running(devnum
))
2717 for (retry
= 0; retry
< 3; retry
++) {
2719 err
= load_and_parse_mpb(dfd
, s
, NULL
, keep_fd
);
2729 /* all mpbs enter, maybe one leaves */
2730 super
= imsm_thunderdome(&super_list
, i
);
2736 if (find_missing(super
) != 0) {
2742 if (st
->subarray
[0]) {
2743 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
2744 super
->current_vol
= atoi(st
->subarray
);
2754 while (super_list
) {
2755 struct intel_super
*s
= super_list
;
2757 super_list
= super_list
->next
;
2765 st
->container_dev
= devnum
;
2766 if (err
== 0 && st
->ss
== NULL
) {
2767 st
->ss
= &super_imsm
;
2768 st
->minor_version
= 0;
2769 st
->max_devs
= IMSM_MAX_DEVICES
;
2771 st
->loaded_container
= 1;
2777 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
2779 struct intel_super
*super
;
2783 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
2787 free_super_imsm(st
);
2789 super
= alloc_super(0);
2792 Name
": malloc of %zu failed.\n",
2797 rv
= load_and_parse_mpb(fd
, super
, devname
, 0);
2802 Name
": Failed to load all information "
2803 "sections on %s\n", devname
);
2808 if (st
->subarray
[0]) {
2809 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
2810 super
->current_vol
= atoi(st
->subarray
);
2818 if (st
->ss
== NULL
) {
2819 st
->ss
= &super_imsm
;
2820 st
->minor_version
= 0;
2821 st
->max_devs
= IMSM_MAX_DEVICES
;
2823 st
->loaded_container
= 0;
2828 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
2830 if (info
->level
== 1)
2832 return info
->chunk_size
>> 9;
2835 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
, int num_domains
)
2839 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
2840 num_stripes
/= num_domains
;
2845 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
2847 if (info
->level
== 1)
2848 return info
->size
* 2;
2850 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
2853 static void imsm_update_version_info(struct intel_super
*super
)
2855 /* update the version and attributes */
2856 struct imsm_super
*mpb
= super
->anchor
;
2858 struct imsm_dev
*dev
;
2859 struct imsm_map
*map
;
2862 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2863 dev
= get_imsm_dev(super
, i
);
2864 map
= get_imsm_map(dev
, 0);
2865 if (__le32_to_cpu(dev
->size_high
) > 0)
2866 mpb
->attributes
|= MPB_ATTRIB_2TB
;
2868 /* FIXME detect when an array spans a port multiplier */
2870 mpb
->attributes
|= MPB_ATTRIB_PM
;
2873 if (mpb
->num_raid_devs
> 1 ||
2874 mpb
->attributes
!= MPB_ATTRIB_CHECKSUM_VERIFY
) {
2875 version
= MPB_VERSION_ATTRIBS
;
2876 switch (get_imsm_raid_level(map
)) {
2877 case 0: mpb
->attributes
|= MPB_ATTRIB_RAID0
; break;
2878 case 1: mpb
->attributes
|= MPB_ATTRIB_RAID1
; break;
2879 case 10: mpb
->attributes
|= MPB_ATTRIB_RAID10
; break;
2880 case 5: mpb
->attributes
|= MPB_ATTRIB_RAID5
; break;
2883 if (map
->num_members
>= 5)
2884 version
= MPB_VERSION_5OR6_DISK_ARRAY
;
2885 else if (dev
->status
== DEV_CLONE_N_GO
)
2886 version
= MPB_VERSION_CNG
;
2887 else if (get_imsm_raid_level(map
) == 5)
2888 version
= MPB_VERSION_RAID5
;
2889 else if (map
->num_members
>= 3)
2890 version
= MPB_VERSION_3OR4_DISK_ARRAY
;
2891 else if (get_imsm_raid_level(map
) == 1)
2892 version
= MPB_VERSION_RAID1
;
2894 version
= MPB_VERSION_RAID0
;
2896 strcpy(((char *) mpb
->sig
) + strlen(MPB_SIGNATURE
), version
);
2900 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
2901 unsigned long long size
, char *name
,
2902 char *homehost
, int *uuid
)
2904 /* We are creating a volume inside a pre-existing container.
2905 * so st->sb is already set.
2907 struct intel_super
*super
= st
->sb
;
2908 struct imsm_super
*mpb
= super
->anchor
;
2909 struct intel_dev
*dv
;
2910 struct imsm_dev
*dev
;
2911 struct imsm_vol
*vol
;
2912 struct imsm_map
*map
;
2913 int idx
= mpb
->num_raid_devs
;
2915 unsigned long long array_blocks
;
2916 size_t size_old
, size_new
;
2917 __u32 num_data_stripes
;
2919 if (super
->orom
&& mpb
->num_raid_devs
>= super
->orom
->vpa
) {
2920 fprintf(stderr
, Name
": This imsm-container already has the "
2921 "maximum of %d volumes\n", super
->orom
->vpa
);
2925 /* ensure the mpb is large enough for the new data */
2926 size_old
= __le32_to_cpu(mpb
->mpb_size
);
2927 size_new
= disks_to_mpb_size(info
->nr_disks
);
2928 if (size_new
> size_old
) {
2930 size_t size_round
= ROUND_UP(size_new
, 512);
2932 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
2933 fprintf(stderr
, Name
": could not allocate new mpb\n");
2936 memcpy(mpb_new
, mpb
, size_old
);
2939 super
->anchor
= mpb_new
;
2940 mpb
->mpb_size
= __cpu_to_le32(size_new
);
2941 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
2943 super
->current_vol
= idx
;
2944 /* when creating the first raid device in this container set num_disks
2945 * to zero, i.e. delete this spare and add raid member devices in
2946 * add_to_super_imsm_volume()
2948 if (super
->current_vol
== 0)
2951 for (i
= 0; i
< super
->current_vol
; i
++) {
2952 dev
= get_imsm_dev(super
, i
);
2953 if (strncmp((char *) dev
->volume
, name
,
2954 MAX_RAID_SERIAL_LEN
) == 0) {
2955 fprintf(stderr
, Name
": '%s' is already defined for this container\n",
2961 sprintf(st
->subarray
, "%d", idx
);
2962 dv
= malloc(sizeof(*dv
));
2964 fprintf(stderr
, Name
": failed to allocate device list entry\n");
2967 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
2970 fprintf(stderr
, Name
": could not allocate raid device\n");
2973 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
2974 if (info
->level
== 1)
2975 array_blocks
= info_to_blocks_per_member(info
);
2977 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
2978 info
->layout
, info
->chunk_size
,
2980 /* round array size down to closest MB */
2981 array_blocks
= (array_blocks
>> SECT_PER_MB_SHIFT
) << SECT_PER_MB_SHIFT
;
2983 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
2984 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
2985 dev
->status
= __cpu_to_le32(0);
2986 dev
->reserved_blocks
= __cpu_to_le32(0);
2988 vol
->migr_state
= 0;
2989 set_migr_type(dev
, MIGR_INIT
);
2991 vol
->curr_migr_unit
= 0;
2992 map
= get_imsm_map(dev
, 0);
2993 map
->pba_of_lba0
= __cpu_to_le32(super
->create_offset
);
2994 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
2995 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
2996 map
->failed_disk_num
= ~0;
2997 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
2998 IMSM_T_STATE_NORMAL
;
3001 if (info
->level
== 1 && info
->raid_disks
> 2) {
3002 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
3003 "in a raid1 volume\n");
3007 map
->raid_level
= info
->level
;
3008 if (info
->level
== 10) {
3009 map
->raid_level
= 1;
3010 map
->num_domains
= info
->raid_disks
/ 2;
3011 } else if (info
->level
== 1)
3012 map
->num_domains
= info
->raid_disks
;
3014 map
->num_domains
= 1;
3016 num_data_stripes
= info_to_num_data_stripes(info
, map
->num_domains
);
3017 map
->num_data_stripes
= __cpu_to_le32(num_data_stripes
);
3019 map
->num_members
= info
->raid_disks
;
3020 for (i
= 0; i
< map
->num_members
; i
++) {
3021 /* initialized in add_to_super */
3022 set_imsm_ord_tbl_ent(map
, i
, 0);
3024 mpb
->num_raid_devs
++;
3027 dv
->index
= super
->current_vol
;
3028 dv
->next
= super
->devlist
;
3029 super
->devlist
= dv
;
3031 imsm_update_version_info(super
);
3036 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
3037 unsigned long long size
, char *name
,
3038 char *homehost
, int *uuid
)
3040 /* This is primarily called by Create when creating a new array.
3041 * We will then get add_to_super called for each component, and then
3042 * write_init_super called to write it out to each device.
3043 * For IMSM, Create can create on fresh devices or on a pre-existing
3045 * To create on a pre-existing array a different method will be called.
3046 * This one is just for fresh drives.
3048 struct intel_super
*super
;
3049 struct imsm_super
*mpb
;
3054 return init_super_imsm_volume(st
, info
, size
, name
, homehost
, uuid
);
3057 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
3061 super
= alloc_super(1);
3062 if (super
&& posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
3067 fprintf(stderr
, Name
3068 ": %s could not allocate superblock\n", __func__
);
3071 memset(super
->buf
, 0, mpb_size
);
3073 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
3077 /* zeroing superblock */
3081 mpb
->attributes
= MPB_ATTRIB_CHECKSUM_VERIFY
;
3083 version
= (char *) mpb
->sig
;
3084 strcpy(version
, MPB_SIGNATURE
);
3085 version
+= strlen(MPB_SIGNATURE
);
3086 strcpy(version
, MPB_VERSION_RAID0
);
3092 static int add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
3093 int fd
, char *devname
)
3095 struct intel_super
*super
= st
->sb
;
3096 struct imsm_super
*mpb
= super
->anchor
;
3098 struct imsm_dev
*dev
;
3099 struct imsm_map
*map
;
3101 dev
= get_imsm_dev(super
, super
->current_vol
);
3102 map
= get_imsm_map(dev
, 0);
3104 if (! (dk
->state
& (1<<MD_DISK_SYNC
))) {
3105 fprintf(stderr
, Name
": %s: Cannot add spare devices to IMSM volume\n",
3111 /* we're doing autolayout so grab the pre-marked (in
3112 * validate_geometry) raid_disk
3114 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3115 if (dl
->raiddisk
== dk
->raid_disk
)
3118 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3119 if (dl
->major
== dk
->major
&&
3120 dl
->minor
== dk
->minor
)
3125 fprintf(stderr
, Name
": %s is not a member of the same container\n", devname
);
3129 /* add a pristine spare to the metadata */
3130 if (dl
->index
< 0) {
3131 dl
->index
= super
->anchor
->num_disks
;
3132 super
->anchor
->num_disks
++;
3134 set_imsm_ord_tbl_ent(map
, dk
->number
, dl
->index
);
3135 dl
->disk
.status
= CONFIGURED_DISK
;
3137 /* if we are creating the first raid device update the family number */
3138 if (super
->current_vol
== 0) {
3140 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
3141 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
3146 sum
+= __gen_imsm_checksum(mpb
);
3147 mpb
->family_num
= __cpu_to_le32(sum
);
3148 mpb
->orig_family_num
= mpb
->family_num
;
3154 static int add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
3155 int fd
, char *devname
)
3157 struct intel_super
*super
= st
->sb
;
3159 unsigned long long size
;
3164 /* if we are on an RAID enabled platform check that the disk is
3165 * attached to the raid controller
3167 if (super
->hba
&& !disk_attached_to_hba(fd
, super
->hba
)) {
3169 Name
": %s is not attached to the raid controller: %s\n",
3170 devname
? : "disk", super
->hba
);
3174 if (super
->current_vol
>= 0)
3175 return add_to_super_imsm_volume(st
, dk
, fd
, devname
);
3178 dd
= malloc(sizeof(*dd
));
3181 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
3184 memset(dd
, 0, sizeof(*dd
));
3185 dd
->major
= major(stb
.st_rdev
);
3186 dd
->minor
= minor(stb
.st_rdev
);
3188 dd
->devname
= devname
? strdup(devname
) : NULL
;
3191 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
3194 Name
": failed to retrieve scsi serial, aborting\n");
3199 get_dev_size(fd
, NULL
, &size
);
3201 serialcpy(dd
->disk
.serial
, dd
->serial
);
3202 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
3203 dd
->disk
.status
= SPARE_DISK
;
3204 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
3205 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
3207 dd
->disk
.scsi_id
= __cpu_to_le32(0);
3209 if (st
->update_tail
) {
3210 dd
->next
= super
->add
;
3213 dd
->next
= super
->disks
;
3220 static int store_imsm_mpb(int fd
, struct imsm_super
*mpb
);
3224 struct imsm_super anchor
;
3225 } spare_record
__attribute__ ((aligned(512)));
3227 /* spare records have their own family number and do not have any defined raid
3230 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
3232 struct imsm_super
*mpb
= super
->anchor
;
3233 struct imsm_super
*spare
= &spare_record
.anchor
;
3237 spare
->mpb_size
= __cpu_to_le32(sizeof(struct imsm_super
)),
3238 spare
->generation_num
= __cpu_to_le32(1UL),
3239 spare
->attributes
= MPB_ATTRIB_CHECKSUM_VERIFY
;
3240 spare
->num_disks
= 1,
3241 spare
->num_raid_devs
= 0,
3242 spare
->cache_size
= mpb
->cache_size
,
3243 spare
->pwr_cycle_count
= __cpu_to_le32(1),
3245 snprintf((char *) spare
->sig
, MAX_SIGNATURE_LENGTH
,
3246 MPB_SIGNATURE MPB_VERSION_RAID0
);
3248 for (d
= super
->disks
; d
; d
= d
->next
) {
3252 spare
->disk
[0] = d
->disk
;
3253 sum
= __gen_imsm_checksum(spare
);
3254 spare
->family_num
= __cpu_to_le32(sum
);
3255 spare
->orig_family_num
= 0;
3256 sum
= __gen_imsm_checksum(spare
);
3257 spare
->check_sum
= __cpu_to_le32(sum
);
3259 if (store_imsm_mpb(d
->fd
, spare
)) {
3260 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
3261 __func__
, d
->major
, d
->minor
, strerror(errno
));
3273 static int write_super_imsm(struct intel_super
*super
, int doclose
)
3275 struct imsm_super
*mpb
= super
->anchor
;
3281 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
3283 /* 'generation' is incremented everytime the metadata is written */
3284 generation
= __le32_to_cpu(mpb
->generation_num
);
3286 mpb
->generation_num
= __cpu_to_le32(generation
);
3288 /* fix up cases where previous mdadm releases failed to set
3291 if (mpb
->orig_family_num
== 0)
3292 mpb
->orig_family_num
= mpb
->family_num
;
3294 mpb_size
+= sizeof(struct imsm_disk
) * mpb
->num_disks
;
3295 for (d
= super
->disks
; d
; d
= d
->next
) {
3299 mpb
->disk
[d
->index
] = d
->disk
;
3301 for (d
= super
->missing
; d
; d
= d
->next
)
3302 mpb
->disk
[d
->index
] = d
->disk
;
3304 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3305 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
3307 imsm_copy_dev(dev
, get_imsm_dev(super
, i
));
3308 mpb_size
+= sizeof_imsm_dev(dev
, 0);
3310 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
3311 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
3313 /* recalculate checksum */
3314 sum
= __gen_imsm_checksum(mpb
);
3315 mpb
->check_sum
= __cpu_to_le32(sum
);
3317 /* write the mpb for disks that compose raid devices */
3318 for (d
= super
->disks
; d
; d
= d
->next
) {
3321 if (store_imsm_mpb(d
->fd
, mpb
))
3322 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
3323 __func__
, d
->major
, d
->minor
, strerror(errno
));
3331 return write_super_imsm_spares(super
, doclose
);
3337 static int create_array(struct supertype
*st
, int dev_idx
)
3340 struct imsm_update_create_array
*u
;
3341 struct intel_super
*super
= st
->sb
;
3342 struct imsm_dev
*dev
= get_imsm_dev(super
, dev_idx
);
3343 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3344 struct disk_info
*inf
;
3345 struct imsm_disk
*disk
;
3348 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0) +
3349 sizeof(*inf
) * map
->num_members
;
3352 fprintf(stderr
, "%s: failed to allocate update buffer\n",
3357 u
->type
= update_create_array
;
3358 u
->dev_idx
= dev_idx
;
3359 imsm_copy_dev(&u
->dev
, dev
);
3360 inf
= get_disk_info(u
);
3361 for (i
= 0; i
< map
->num_members
; i
++) {
3362 int idx
= get_imsm_disk_idx(dev
, i
);
3364 disk
= get_imsm_disk(super
, idx
);
3365 serialcpy(inf
[i
].serial
, disk
->serial
);
3367 append_metadata_update(st
, u
, len
);
3372 static int _add_disk(struct supertype
*st
)
3374 struct intel_super
*super
= st
->sb
;
3376 struct imsm_update_add_disk
*u
;
3384 fprintf(stderr
, "%s: failed to allocate update buffer\n",
3389 u
->type
= update_add_disk
;
3390 append_metadata_update(st
, u
, len
);
3395 static int write_init_super_imsm(struct supertype
*st
)
3397 struct intel_super
*super
= st
->sb
;
3398 int current_vol
= super
->current_vol
;
3400 /* we are done with current_vol reset it to point st at the container */
3401 super
->current_vol
= -1;
3403 if (st
->update_tail
) {
3404 /* queue the recently created array / added disk
3405 * as a metadata update */
3409 /* determine if we are creating a volume or adding a disk */
3410 if (current_vol
< 0) {
3411 /* in the add disk case we are running in mdmon
3412 * context, so don't close fd's
3414 return _add_disk(st
);
3416 rv
= create_array(st
, current_vol
);
3418 for (d
= super
->disks
; d
; d
= d
->next
) {
3425 return write_super_imsm(st
->sb
, 1);
3429 static int store_super_imsm(struct supertype
*st
, int fd
)
3431 struct intel_super
*super
= st
->sb
;
3432 struct imsm_super
*mpb
= super
? super
->anchor
: NULL
;
3438 return store_imsm_mpb(fd
, mpb
);
3444 static int imsm_bbm_log_size(struct imsm_super
*mpb
)
3446 return __le32_to_cpu(mpb
->bbm_log_size
);
3450 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
3451 int layout
, int raiddisks
, int chunk
,
3452 unsigned long long size
, char *dev
,
3453 unsigned long long *freesize
,
3457 unsigned long long ldsize
;
3458 const struct imsm_orom
*orom
;
3460 if (level
!= LEVEL_CONTAINER
)
3465 if (check_env("IMSM_NO_PLATFORM"))
3468 orom
= find_imsm_orom();
3469 if (orom
&& raiddisks
> orom
->tds
) {
3471 fprintf(stderr
, Name
": %d exceeds maximum number of"
3472 " platform supported disks: %d\n",
3473 raiddisks
, orom
->tds
);
3477 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
3480 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
3481 dev
, strerror(errno
));
3484 if (!get_dev_size(fd
, dev
, &ldsize
)) {
3490 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
3495 static unsigned long long find_size(struct extent
*e
, int *idx
, int num_extents
)
3497 const unsigned long long base_start
= e
[*idx
].start
;
3498 unsigned long long end
= base_start
+ e
[*idx
].size
;
3501 if (base_start
== end
)
3505 for (i
= *idx
; i
< num_extents
; i
++) {
3506 /* extend overlapping extents */
3507 if (e
[i
].start
>= base_start
&&
3508 e
[i
].start
<= end
) {
3511 if (e
[i
].start
+ e
[i
].size
> end
)
3512 end
= e
[i
].start
+ e
[i
].size
;
3513 } else if (e
[i
].start
> end
) {
3519 return end
- base_start
;
3522 static unsigned long long merge_extents(struct intel_super
*super
, int sum_extents
)
3524 /* build a composite disk with all known extents and generate a new
3525 * 'maxsize' given the "all disks in an array must share a common start
3526 * offset" constraint
3528 struct extent
*e
= calloc(sum_extents
, sizeof(*e
));
3532 unsigned long long pos
;
3533 unsigned long long start
= 0;
3534 unsigned long long maxsize
;
3535 unsigned long reserve
;
3540 /* coalesce and sort all extents. also, check to see if we need to
3541 * reserve space between member arrays
3544 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
3547 for (i
= 0; i
< dl
->extent_cnt
; i
++)
3550 qsort(e
, sum_extents
, sizeof(*e
), cmp_extent
);
3555 while (i
< sum_extents
) {
3556 e
[j
].start
= e
[i
].start
;
3557 e
[j
].size
= find_size(e
, &i
, sum_extents
);
3559 if (e
[j
-1].size
== 0)
3568 unsigned long long esize
;
3570 esize
= e
[i
].start
- pos
;
3571 if (esize
>= maxsize
) {
3576 pos
= e
[i
].start
+ e
[i
].size
;
3578 } while (e
[i
-1].size
);
3584 /* FIXME assumes volume at offset 0 is the first volume in a
3587 if (start_extent
> 0)
3588 reserve
= IMSM_RESERVED_SECTORS
; /* gap between raid regions */
3592 if (maxsize
< reserve
)
3595 super
->create_offset
= ~((__u32
) 0);
3596 if (start
+ reserve
> super
->create_offset
)
3597 return 0; /* start overflows create_offset */
3598 super
->create_offset
= start
+ reserve
;
3600 return maxsize
- reserve
;
3603 static int is_raid_level_supported(const struct imsm_orom
*orom
, int level
, int raiddisks
)
3605 if (level
< 0 || level
== 6 || level
== 4)
3608 /* if we have an orom prevent invalid raid levels */
3611 case 0: return imsm_orom_has_raid0(orom
);
3614 return imsm_orom_has_raid1e(orom
);
3615 return imsm_orom_has_raid1(orom
) && raiddisks
== 2;
3616 case 10: return imsm_orom_has_raid10(orom
) && raiddisks
== 4;
3617 case 5: return imsm_orom_has_raid5(orom
) && raiddisks
> 2;
3620 return 1; /* not on an Intel RAID platform so anything goes */
3625 #define pr_vrb(fmt, arg...) (void) (verbose && fprintf(stderr, Name fmt, ##arg))
3627 validate_geometry_imsm_orom(struct intel_super
*super
, int level
, int layout
,
3628 int raiddisks
, int chunk
, int verbose
)
3630 if (!is_raid_level_supported(super
->orom
, level
, raiddisks
)) {
3631 pr_vrb(": platform does not support raid%d with %d disk%s\n",
3632 level
, raiddisks
, raiddisks
> 1 ? "s" : "");
3635 if (super
->orom
&& level
!= 1 &&
3636 !imsm_orom_has_chunk(super
->orom
, chunk
)) {
3637 pr_vrb(": platform does not support a chunk size of: %d\n", chunk
);
3640 if (layout
!= imsm_level_to_layout(level
)) {
3642 pr_vrb(": imsm raid 5 only supports the left-asymmetric layout\n");
3643 else if (level
== 10)
3644 pr_vrb(": imsm raid 10 only supports the n2 layout\n");
3646 pr_vrb(": imsm unknown layout %#x for this raid level %d\n",
3654 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
3655 * FIX ME add ahci details
3657 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
3658 int layout
, int raiddisks
, int chunk
,
3659 unsigned long long size
, char *dev
,
3660 unsigned long long *freesize
,
3664 struct intel_super
*super
= st
->sb
;
3665 struct imsm_super
*mpb
= super
->anchor
;
3667 unsigned long long pos
= 0;
3668 unsigned long long maxsize
;
3672 /* We must have the container info already read in. */
3676 if (!validate_geometry_imsm_orom(super
, level
, layout
, raiddisks
, chunk
, verbose
))
3680 /* General test: make sure there is space for
3681 * 'raiddisks' device extents of size 'size' at a given
3684 unsigned long long minsize
= size
;
3685 unsigned long long start_offset
= MaxSector
;
3688 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
3689 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
3694 e
= get_extents(super
, dl
);
3697 unsigned long long esize
;
3698 esize
= e
[i
].start
- pos
;
3699 if (esize
>= minsize
)
3701 if (found
&& start_offset
== MaxSector
) {
3704 } else if (found
&& pos
!= start_offset
) {
3708 pos
= e
[i
].start
+ e
[i
].size
;
3710 } while (e
[i
-1].size
);
3715 if (dcnt
< raiddisks
) {
3717 fprintf(stderr
, Name
": imsm: Not enough "
3718 "devices with space for this array "
3726 /* This device must be a member of the set */
3727 if (stat(dev
, &stb
) < 0)
3729 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
3731 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
3732 if (dl
->major
== major(stb
.st_rdev
) &&
3733 dl
->minor
== minor(stb
.st_rdev
))
3738 fprintf(stderr
, Name
": %s is not in the "
3739 "same imsm set\n", dev
);
3741 } else if (super
->orom
&& dl
->index
< 0 && mpb
->num_raid_devs
) {
3742 /* If a volume is present then the current creation attempt
3743 * cannot incorporate new spares because the orom may not
3744 * understand this configuration (all member disks must be
3745 * members of each array in the container).
3747 fprintf(stderr
, Name
": %s is a spare and a volume"
3748 " is already defined for this container\n", dev
);
3749 fprintf(stderr
, Name
": The option-rom requires all member"
3750 " disks to be a member of all volumes\n");
3754 /* retrieve the largest free space block */
3755 e
= get_extents(super
, dl
);
3760 unsigned long long esize
;
3762 esize
= e
[i
].start
- pos
;
3763 if (esize
>= maxsize
)
3765 pos
= e
[i
].start
+ e
[i
].size
;
3767 } while (e
[i
-1].size
);
3772 fprintf(stderr
, Name
": unable to determine free space for: %s\n",
3776 if (maxsize
< size
) {
3778 fprintf(stderr
, Name
": %s not enough space (%llu < %llu)\n",
3779 dev
, maxsize
, size
);
3783 /* count total number of extents for merge */
3785 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3787 i
+= dl
->extent_cnt
;
3789 maxsize
= merge_extents(super
, i
);
3790 if (maxsize
< size
|| maxsize
== 0) {
3792 fprintf(stderr
, Name
": not enough space after merge (%llu < %llu)\n",
3797 *freesize
= maxsize
;
3802 static int reserve_space(struct supertype
*st
, int raiddisks
,
3803 unsigned long long size
, int chunk
,
3804 unsigned long long *freesize
)
3806 struct intel_super
*super
= st
->sb
;
3807 struct imsm_super
*mpb
= super
->anchor
;
3812 unsigned long long maxsize
;
3813 unsigned long long minsize
;
3817 /* find the largest common start free region of the possible disks */
3821 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
3827 /* don't activate new spares if we are orom constrained
3828 * and there is already a volume active in the container
3830 if (super
->orom
&& dl
->index
< 0 && mpb
->num_raid_devs
)
3833 e
= get_extents(super
, dl
);
3836 for (i
= 1; e
[i
-1].size
; i
++)
3844 maxsize
= merge_extents(super
, extent_cnt
);
3849 if (cnt
< raiddisks
||
3850 (super
->orom
&& used
&& used
!= raiddisks
) ||
3851 maxsize
< minsize
||
3853 fprintf(stderr
, Name
": not enough devices with space to create array.\n");
3854 return 0; /* No enough free spaces large enough */
3866 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3868 dl
->raiddisk
= cnt
++;
3875 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
3876 int raiddisks
, int chunk
, unsigned long long size
,
3877 char *dev
, unsigned long long *freesize
,
3883 /* if given unused devices create a container
3884 * if given given devices in a container create a member volume
3886 if (level
== LEVEL_CONTAINER
) {
3887 /* Must be a fresh device to add to a container */
3888 return validate_geometry_imsm_container(st
, level
, layout
,
3889 raiddisks
, chunk
, size
,
3895 if (st
->sb
&& freesize
) {
3896 /* we are being asked to automatically layout a
3897 * new volume based on the current contents of
3898 * the container. If the the parameters can be
3899 * satisfied reserve_space will record the disks,
3900 * start offset, and size of the volume to be
3901 * created. add_to_super and getinfo_super
3902 * detect when autolayout is in progress.
3904 if (!validate_geometry_imsm_orom(st
->sb
, level
, layout
,
3908 return reserve_space(st
, raiddisks
, size
, chunk
, freesize
);
3913 /* creating in a given container */
3914 return validate_geometry_imsm_volume(st
, level
, layout
,
3915 raiddisks
, chunk
, size
,
3916 dev
, freesize
, verbose
);
3919 /* limit creation to the following levels */
3929 fprintf(stderr
, Name
3930 ": IMSM only supports levels 0,1,5,10\n");
3934 /* This device needs to be a device in an 'imsm' container */
3935 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
3939 Name
": Cannot create this array on device %s\n",
3944 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
3946 fprintf(stderr
, Name
": Cannot open %s: %s\n",
3947 dev
, strerror(errno
));
3950 /* Well, it is in use by someone, maybe an 'imsm' container. */
3951 cfd
= open_container(fd
);
3955 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
3959 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
3961 if (sra
&& sra
->array
.major_version
== -1 &&
3962 strcmp(sra
->text_version
, "imsm") == 0) {
3963 /* This is a member of a imsm container. Load the container
3964 * and try to create a volume
3966 struct intel_super
*super
;
3968 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
3970 st
->container_dev
= fd2devnum(cfd
);
3972 return validate_geometry_imsm_volume(st
, level
, layout
,
3978 } else /* may belong to another container */
3983 #endif /* MDASSEMBLE */
3985 static int is_rebuilding(struct imsm_dev
*dev
)
3987 struct imsm_map
*migr_map
;
3989 if (!dev
->vol
.migr_state
)
3992 if (migr_type(dev
) != MIGR_REBUILD
)
3995 migr_map
= get_imsm_map(dev
, 1);
3997 if (migr_map
->map_state
== IMSM_T_STATE_DEGRADED
)
4003 static void update_recovery_start(struct imsm_dev
*dev
, struct mdinfo
*array
)
4005 struct mdinfo
*rebuild
= NULL
;
4009 if (!is_rebuilding(dev
))
4012 /* Find the rebuild target, but punt on the dual rebuild case */
4013 for (d
= array
->devs
; d
; d
= d
->next
)
4014 if (d
->recovery_start
== 0) {
4020 units
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
4021 rebuild
->recovery_start
= units
* blocks_per_migr_unit(dev
);
4025 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
4027 /* Given a container loaded by load_super_imsm_all,
4028 * extract information about all the arrays into
4031 * For each imsm_dev create an mdinfo, fill it in,
4032 * then look for matching devices in super->disks
4033 * and create appropriate device mdinfo.
4035 struct intel_super
*super
= st
->sb
;
4036 struct imsm_super
*mpb
= super
->anchor
;
4037 struct mdinfo
*rest
= NULL
;
4040 /* do not assemble arrays that might have bad blocks */
4041 if (imsm_bbm_log_size(super
->anchor
)) {
4042 fprintf(stderr
, Name
": BBM log found in metadata. "
4043 "Cannot activate array(s).\n");
4047 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4048 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
4049 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4050 struct mdinfo
*this;
4053 /* do not publish arrays that are in the middle of an
4054 * unsupported migration
4056 if (dev
->vol
.migr_state
&&
4057 (migr_type(dev
) == MIGR_GEN_MIGR
||
4058 migr_type(dev
) == MIGR_STATE_CHANGE
)) {
4059 fprintf(stderr
, Name
": cannot assemble volume '%.16s':"
4060 " unsupported migration in progress\n",
4065 this = malloc(sizeof(*this));
4066 memset(this, 0, sizeof(*this));
4069 super
->current_vol
= i
;
4070 getinfo_super_imsm_volume(st
, this);
4071 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
4072 unsigned long long recovery_start
;
4073 struct mdinfo
*info_d
;
4080 idx
= get_imsm_disk_idx(dev
, slot
);
4081 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
4082 for (d
= super
->disks
; d
; d
= d
->next
)
4083 if (d
->index
== idx
)
4086 recovery_start
= MaxSector
;
4089 if (d
&& is_failed(&d
->disk
))
4091 if (ord
& IMSM_ORD_REBUILD
)
4095 * if we skip some disks the array will be assmebled degraded;
4096 * reset resync start to avoid a dirty-degraded
4097 * situation when performing the intial sync
4099 * FIXME handle dirty degraded
4101 if ((skip
|| recovery_start
== 0) && !dev
->vol
.dirty
)
4102 this->resync_start
= MaxSector
;
4106 info_d
= calloc(1, sizeof(*info_d
));
4108 fprintf(stderr
, Name
": failed to allocate disk"
4109 " for volume %.16s\n", dev
->volume
);
4110 info_d
= this->devs
;
4112 struct mdinfo
*d
= info_d
->next
;
4121 info_d
->next
= this->devs
;
4122 this->devs
= info_d
;
4124 info_d
->disk
.number
= d
->index
;
4125 info_d
->disk
.major
= d
->major
;
4126 info_d
->disk
.minor
= d
->minor
;
4127 info_d
->disk
.raid_disk
= slot
;
4128 info_d
->recovery_start
= recovery_start
;
4130 if (info_d
->recovery_start
== MaxSector
)
4131 this->array
.working_disks
++;
4133 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
4134 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
4135 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
4137 strcpy(info_d
->name
, d
->devname
);
4139 /* now that the disk list is up-to-date fixup recovery_start */
4140 update_recovery_start(dev
, this);
4149 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
4152 struct intel_super
*super
= c
->sb
;
4153 struct imsm_super
*mpb
= super
->anchor
;
4155 if (atoi(inst
) >= mpb
->num_raid_devs
) {
4156 fprintf(stderr
, "%s: subarry index %d, out of range\n",
4157 __func__
, atoi(inst
));
4161 dprintf("imsm: open_new %s\n", inst
);
4162 a
->info
.container_member
= atoi(inst
);
4166 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
, int failed
)
4168 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4171 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
4172 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
4174 switch (get_imsm_raid_level(map
)) {
4176 return IMSM_T_STATE_FAILED
;
4179 if (failed
< map
->num_members
)
4180 return IMSM_T_STATE_DEGRADED
;
4182 return IMSM_T_STATE_FAILED
;
4187 * check to see if any mirrors have failed, otherwise we
4188 * are degraded. Even numbered slots are mirrored on
4192 /* gcc -Os complains that this is unused */
4193 int insync
= insync
;
4195 for (i
= 0; i
< map
->num_members
; i
++) {
4196 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
4197 int idx
= ord_to_idx(ord
);
4198 struct imsm_disk
*disk
;
4200 /* reset the potential in-sync count on even-numbered
4201 * slots. num_copies is always 2 for imsm raid10
4206 disk
= get_imsm_disk(super
, idx
);
4207 if (!disk
|| is_failed(disk
) || ord
& IMSM_ORD_REBUILD
)
4210 /* no in-sync disks left in this mirror the
4214 return IMSM_T_STATE_FAILED
;
4217 return IMSM_T_STATE_DEGRADED
;
4221 return IMSM_T_STATE_DEGRADED
;
4223 return IMSM_T_STATE_FAILED
;
4229 return map
->map_state
;
4232 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
)
4236 struct imsm_disk
*disk
;
4237 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4238 struct imsm_map
*prev
= get_imsm_map(dev
, dev
->vol
.migr_state
);
4242 /* at the beginning of migration we set IMSM_ORD_REBUILD on
4243 * disks that are being rebuilt. New failures are recorded to
4244 * map[0]. So we look through all the disks we started with and
4245 * see if any failures are still present, or if any new ones
4248 * FIXME add support for online capacity expansion and
4249 * raid-level-migration
4251 for (i
= 0; i
< prev
->num_members
; i
++) {
4252 ord
= __le32_to_cpu(prev
->disk_ord_tbl
[i
]);
4253 ord
|= __le32_to_cpu(map
->disk_ord_tbl
[i
]);
4254 idx
= ord_to_idx(ord
);
4256 disk
= get_imsm_disk(super
, idx
);
4257 if (!disk
|| is_failed(disk
) || ord
& IMSM_ORD_REBUILD
)
4264 static int is_resyncing(struct imsm_dev
*dev
)
4266 struct imsm_map
*migr_map
;
4268 if (!dev
->vol
.migr_state
)
4271 if (migr_type(dev
) == MIGR_INIT
||
4272 migr_type(dev
) == MIGR_REPAIR
)
4275 migr_map
= get_imsm_map(dev
, 1);
4277 if (migr_map
->map_state
== IMSM_T_STATE_NORMAL
)
4283 /* return true if we recorded new information */
4284 static int mark_failure(struct imsm_dev
*dev
, struct imsm_disk
*disk
, int idx
)
4288 struct imsm_map
*map
;
4290 /* new failures are always set in map[0] */
4291 map
= get_imsm_map(dev
, 0);
4293 slot
= get_imsm_disk_slot(map
, idx
);
4297 ord
= __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
4298 if (is_failed(disk
) && (ord
& IMSM_ORD_REBUILD
))
4301 disk
->status
|= FAILED_DISK
;
4302 disk
->status
&= ~CONFIGURED_DISK
;
4303 set_imsm_ord_tbl_ent(map
, slot
, idx
| IMSM_ORD_REBUILD
);
4304 if (~map
->failed_disk_num
== 0)
4305 map
->failed_disk_num
= slot
;
4309 static void mark_missing(struct imsm_dev
*dev
, struct imsm_disk
*disk
, int idx
)
4311 mark_failure(dev
, disk
, idx
);
4313 if (disk
->scsi_id
== __cpu_to_le32(~(__u32
)0))
4316 disk
->scsi_id
= __cpu_to_le32(~(__u32
)0);
4317 memmove(&disk
->serial
[0], &disk
->serial
[1], MAX_RAID_SERIAL_LEN
- 1);
4320 /* Handle dirty -> clean transititions and resync. Degraded and rebuild
4321 * states are handled in imsm_set_disk() with one exception, when a
4322 * resync is stopped due to a new failure this routine will set the
4323 * 'degraded' state for the array.
4325 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
4327 int inst
= a
->info
.container_member
;
4328 struct intel_super
*super
= a
->container
->sb
;
4329 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
4330 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4331 int failed
= imsm_count_failed(super
, dev
);
4332 __u8 map_state
= imsm_check_degraded(super
, dev
, failed
);
4333 __u32 blocks_per_unit
;
4335 /* before we activate this array handle any missing disks */
4336 if (consistent
== 2 && super
->missing
) {
4339 dprintf("imsm: mark missing\n");
4340 end_migration(dev
, map_state
);
4341 for (dl
= super
->missing
; dl
; dl
= dl
->next
)
4342 mark_missing(dev
, &dl
->disk
, dl
->index
);
4343 super
->updates_pending
++;
4346 if (consistent
== 2 &&
4347 (!is_resync_complete(&a
->info
) ||
4348 map_state
!= IMSM_T_STATE_NORMAL
||
4349 dev
->vol
.migr_state
))
4352 if (is_resync_complete(&a
->info
)) {
4353 /* complete intialization / resync,
4354 * recovery and interrupted recovery is completed in
4357 if (is_resyncing(dev
)) {
4358 dprintf("imsm: mark resync done\n");
4359 end_migration(dev
, map_state
);
4360 super
->updates_pending
++;
4362 } else if (!is_resyncing(dev
) && !failed
) {
4363 /* mark the start of the init process if nothing is failed */
4364 dprintf("imsm: mark resync start\n");
4365 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
)
4366 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_INIT
);
4368 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_REPAIR
);
4369 super
->updates_pending
++;
4372 /* check if we can update curr_migr_unit from resync_start, recovery_start */
4373 blocks_per_unit
= blocks_per_migr_unit(dev
);
4374 if (blocks_per_unit
&& failed
<= 1) {
4378 if (migr_type(dev
) == MIGR_REBUILD
)
4379 units
= min_recovery_start(&a
->info
) / blocks_per_unit
;
4381 units
= a
->info
.resync_start
/ blocks_per_unit
;
4384 /* check that we did not overflow 32-bits, and that
4385 * curr_migr_unit needs updating
4387 if (units32
== units
&&
4388 __le32_to_cpu(dev
->vol
.curr_migr_unit
) != units32
) {
4389 dprintf("imsm: mark checkpoint (%u)\n", units32
);
4390 dev
->vol
.curr_migr_unit
= __cpu_to_le32(units32
);
4391 super
->updates_pending
++;
4395 /* mark dirty / clean */
4396 if (dev
->vol
.dirty
!= !consistent
) {
4397 dprintf("imsm: mark '%s'\n", consistent
? "clean" : "dirty");
4402 super
->updates_pending
++;
4407 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
4409 int inst
= a
->info
.container_member
;
4410 struct intel_super
*super
= a
->container
->sb
;
4411 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
4412 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4413 struct imsm_disk
*disk
;
4418 if (n
> map
->num_members
)
4419 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
4420 n
, map
->num_members
- 1);
4425 dprintf("imsm: set_disk %d:%x\n", n
, state
);
4427 ord
= get_imsm_ord_tbl_ent(dev
, n
);
4428 disk
= get_imsm_disk(super
, ord_to_idx(ord
));
4430 /* check for new failures */
4431 if (state
& DS_FAULTY
) {
4432 if (mark_failure(dev
, disk
, ord_to_idx(ord
)))
4433 super
->updates_pending
++;
4436 /* check if in_sync */
4437 if (state
& DS_INSYNC
&& ord
& IMSM_ORD_REBUILD
&& is_rebuilding(dev
)) {
4438 struct imsm_map
*migr_map
= get_imsm_map(dev
, 1);
4440 set_imsm_ord_tbl_ent(migr_map
, n
, ord_to_idx(ord
));
4441 super
->updates_pending
++;
4444 failed
= imsm_count_failed(super
, dev
);
4445 map_state
= imsm_check_degraded(super
, dev
, failed
);
4447 /* check if recovery complete, newly degraded, or failed */
4448 if (map_state
== IMSM_T_STATE_NORMAL
&& is_rebuilding(dev
)) {
4449 end_migration(dev
, map_state
);
4450 map
= get_imsm_map(dev
, 0);
4451 map
->failed_disk_num
= ~0;
4452 super
->updates_pending
++;
4453 } else if (map_state
== IMSM_T_STATE_DEGRADED
&&
4454 map
->map_state
!= map_state
&&
4455 !dev
->vol
.migr_state
) {
4456 dprintf("imsm: mark degraded\n");
4457 map
->map_state
= map_state
;
4458 super
->updates_pending
++;
4459 } else if (map_state
== IMSM_T_STATE_FAILED
&&
4460 map
->map_state
!= map_state
) {
4461 dprintf("imsm: mark failed\n");
4462 end_migration(dev
, map_state
);
4463 super
->updates_pending
++;
4467 static int store_imsm_mpb(int fd
, struct imsm_super
*mpb
)
4470 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
4471 unsigned long long dsize
;
4472 unsigned long long sectors
;
4474 get_dev_size(fd
, NULL
, &dsize
);
4476 if (mpb_size
> 512) {
4477 /* -1 to account for anchor */
4478 sectors
= mpb_sectors(mpb
) - 1;
4480 /* write the extended mpb to the sectors preceeding the anchor */
4481 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
4484 if (write(fd
, buf
+ 512, 512 * sectors
) != 512 * sectors
)
4488 /* first block is stored on second to last sector of the disk */
4489 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
4492 if (write(fd
, buf
, 512) != 512)
4498 static void imsm_sync_metadata(struct supertype
*container
)
4500 struct intel_super
*super
= container
->sb
;
4502 if (!super
->updates_pending
)
4505 write_super_imsm(super
, 0);
4507 super
->updates_pending
= 0;
4510 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
4512 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
4513 int i
= get_imsm_disk_idx(dev
, idx
);
4516 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
4520 if (dl
&& is_failed(&dl
->disk
))
4524 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
4529 static struct dl
*imsm_add_spare(struct intel_super
*super
, int slot
,
4530 struct active_array
*a
, int activate_new
)
4532 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
4533 int idx
= get_imsm_disk_idx(dev
, slot
);
4534 struct imsm_super
*mpb
= super
->anchor
;
4535 struct imsm_map
*map
;
4536 unsigned long long pos
;
4545 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
4546 /* If in this array, skip */
4547 for (d
= a
->info
.devs
; d
; d
= d
->next
)
4548 if (d
->state_fd
>= 0 &&
4549 d
->disk
.major
== dl
->major
&&
4550 d
->disk
.minor
== dl
->minor
) {
4551 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
4557 /* skip in use or failed drives */
4558 if (is_failed(&dl
->disk
) || idx
== dl
->index
||
4560 dprintf("%x:%x status (failed: %d index: %d)\n",
4561 dl
->major
, dl
->minor
, is_failed(&dl
->disk
), idx
);
4565 /* skip pure spares when we are looking for partially
4566 * assimilated drives
4568 if (dl
->index
== -1 && !activate_new
)
4571 /* Does this unused device have the requisite free space?
4572 * It needs to be able to cover all member volumes
4574 ex
= get_extents(super
, dl
);
4576 dprintf("cannot get extents\n");
4579 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4580 dev
= get_imsm_dev(super
, i
);
4581 map
= get_imsm_map(dev
, 0);
4583 /* check if this disk is already a member of
4586 if (get_imsm_disk_slot(map
, dl
->index
) >= 0)
4592 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
4593 array_end
= array_start
+
4594 __le32_to_cpu(map
->blocks_per_member
) - 1;
4597 /* check that we can start at pba_of_lba0 with
4598 * blocks_per_member of space
4600 if (array_start
>= pos
&& array_end
< ex
[j
].start
) {
4604 pos
= ex
[j
].start
+ ex
[j
].size
;
4606 } while (ex
[j
-1].size
);
4613 if (i
< mpb
->num_raid_devs
) {
4614 dprintf("%x:%x does not have %u to %u available\n",
4615 dl
->major
, dl
->minor
, array_start
, array_end
);
4625 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
4626 struct metadata_update
**updates
)
4629 * Find a device with unused free space and use it to replace a
4630 * failed/vacant region in an array. We replace failed regions one a
4631 * array at a time. The result is that a new spare disk will be added
4632 * to the first failed array and after the monitor has finished
4633 * propagating failures the remainder will be consumed.
4635 * FIXME add a capability for mdmon to request spares from another
4639 struct intel_super
*super
= a
->container
->sb
;
4640 int inst
= a
->info
.container_member
;
4641 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
4642 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4643 int failed
= a
->info
.array
.raid_disks
;
4644 struct mdinfo
*rv
= NULL
;
4647 struct metadata_update
*mu
;
4649 struct imsm_update_activate_spare
*u
;
4653 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
4654 if ((d
->curr_state
& DS_FAULTY
) &&
4656 /* wait for Removal to happen */
4658 if (d
->state_fd
>= 0)
4662 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
4663 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
4664 if (imsm_check_degraded(super
, dev
, failed
) != IMSM_T_STATE_DEGRADED
)
4667 /* For each slot, if it is not working, find a spare */
4668 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
4669 for (d
= a
->info
.devs
; d
; d
= d
->next
)
4670 if (d
->disk
.raid_disk
== i
)
4672 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
4673 if (d
&& (d
->state_fd
>= 0))
4677 * OK, this device needs recovery. Try to re-add the
4678 * previous occupant of this slot, if this fails see if
4679 * we can continue the assimilation of a spare that was
4680 * partially assimilated, finally try to activate a new
4683 dl
= imsm_readd(super
, i
, a
);
4685 dl
= imsm_add_spare(super
, i
, a
, 0);
4687 dl
= imsm_add_spare(super
, i
, a
, 1);
4691 /* found a usable disk with enough space */
4692 di
= malloc(sizeof(*di
));
4695 memset(di
, 0, sizeof(*di
));
4697 /* dl->index will be -1 in the case we are activating a
4698 * pristine spare. imsm_process_update() will create a
4699 * new index in this case. Once a disk is found to be
4700 * failed in all member arrays it is kicked from the
4703 di
->disk
.number
= dl
->index
;
4705 /* (ab)use di->devs to store a pointer to the device
4708 di
->devs
= (struct mdinfo
*) dl
;
4710 di
->disk
.raid_disk
= i
;
4711 di
->disk
.major
= dl
->major
;
4712 di
->disk
.minor
= dl
->minor
;
4714 di
->recovery_start
= 0;
4715 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
4716 di
->component_size
= a
->info
.component_size
;
4717 di
->container_member
= inst
;
4718 super
->random
= random32();
4722 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
4723 i
, di
->data_offset
);
4729 /* No spares found */
4731 /* Now 'rv' has a list of devices to return.
4732 * Create a metadata_update record to update the
4733 * disk_ord_tbl for the array
4735 mu
= malloc(sizeof(*mu
));
4737 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
4738 if (mu
->buf
== NULL
) {
4745 struct mdinfo
*n
= rv
->next
;
4754 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
4755 mu
->next
= *updates
;
4756 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
4758 for (di
= rv
; di
; di
= di
->next
) {
4759 u
->type
= update_activate_spare
;
4760 u
->dl
= (struct dl
*) di
->devs
;
4762 u
->slot
= di
->disk
.raid_disk
;
4773 static int disks_overlap(struct intel_super
*super
, int idx
, struct imsm_update_create_array
*u
)
4775 struct imsm_dev
*dev
= get_imsm_dev(super
, idx
);
4776 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4777 struct imsm_map
*new_map
= get_imsm_map(&u
->dev
, 0);
4778 struct disk_info
*inf
= get_disk_info(u
);
4779 struct imsm_disk
*disk
;
4783 for (i
= 0; i
< map
->num_members
; i
++) {
4784 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
4785 for (j
= 0; j
< new_map
->num_members
; j
++)
4786 if (serialcmp(disk
->serial
, inf
[j
].serial
) == 0)
4793 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
);
4795 static void imsm_process_update(struct supertype
*st
,
4796 struct metadata_update
*update
)
4799 * crack open the metadata_update envelope to find the update record
4800 * update can be one of:
4801 * update_activate_spare - a spare device has replaced a failed
4802 * device in an array, update the disk_ord_tbl. If this disk is
4803 * present in all member arrays then also clear the SPARE_DISK
4806 struct intel_super
*super
= st
->sb
;
4807 struct imsm_super
*mpb
;
4808 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
4810 /* update requires a larger buf but the allocation failed */
4811 if (super
->next_len
&& !super
->next_buf
) {
4812 super
->next_len
= 0;
4816 if (super
->next_buf
) {
4817 memcpy(super
->next_buf
, super
->buf
, super
->len
);
4819 super
->len
= super
->next_len
;
4820 super
->buf
= super
->next_buf
;
4822 super
->next_len
= 0;
4823 super
->next_buf
= NULL
;
4826 mpb
= super
->anchor
;
4829 case update_activate_spare
: {
4830 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
4831 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
4832 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4833 struct imsm_map
*migr_map
;
4834 struct active_array
*a
;
4835 struct imsm_disk
*disk
;
4840 int victim
= get_imsm_disk_idx(dev
, u
->slot
);
4843 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
4848 fprintf(stderr
, "error: imsm_activate_spare passed "
4849 "an unknown disk (index: %d)\n",
4854 super
->updates_pending
++;
4856 /* count failures (excluding rebuilds and the victim)
4857 * to determine map[0] state
4860 for (i
= 0; i
< map
->num_members
; i
++) {
4863 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
4864 if (!disk
|| is_failed(disk
))
4868 /* adding a pristine spare, assign a new index */
4869 if (dl
->index
< 0) {
4870 dl
->index
= super
->anchor
->num_disks
;
4871 super
->anchor
->num_disks
++;
4874 disk
->status
|= CONFIGURED_DISK
;
4875 disk
->status
&= ~SPARE_DISK
;
4878 to_state
= imsm_check_degraded(super
, dev
, failed
);
4879 map
->map_state
= IMSM_T_STATE_DEGRADED
;
4880 migrate(dev
, to_state
, MIGR_REBUILD
);
4881 migr_map
= get_imsm_map(dev
, 1);
4882 set_imsm_ord_tbl_ent(map
, u
->slot
, dl
->index
);
4883 set_imsm_ord_tbl_ent(migr_map
, u
->slot
, dl
->index
| IMSM_ORD_REBUILD
);
4885 /* update the family_num to mark a new container
4886 * generation, being careful to record the existing
4887 * family_num in orig_family_num to clean up after
4888 * earlier mdadm versions that neglected to set it.
4890 if (mpb
->orig_family_num
== 0)
4891 mpb
->orig_family_num
= mpb
->family_num
;
4892 mpb
->family_num
+= super
->random
;
4894 /* count arrays using the victim in the metadata */
4896 for (a
= st
->arrays
; a
; a
= a
->next
) {
4897 dev
= get_imsm_dev(super
, a
->info
.container_member
);
4898 map
= get_imsm_map(dev
, 0);
4900 if (get_imsm_disk_slot(map
, victim
) >= 0)
4904 /* delete the victim if it is no longer being
4910 /* We know that 'manager' isn't touching anything,
4911 * so it is safe to delete
4913 for (dlp
= &super
->disks
; *dlp
; dlp
= &(*dlp
)->next
)
4914 if ((*dlp
)->index
== victim
)
4917 /* victim may be on the missing list */
4919 for (dlp
= &super
->missing
; *dlp
; dlp
= &(*dlp
)->next
)
4920 if ((*dlp
)->index
== victim
)
4922 imsm_delete(super
, dlp
, victim
);
4926 case update_create_array
: {
4927 /* someone wants to create a new array, we need to be aware of
4928 * a few races/collisions:
4929 * 1/ 'Create' called by two separate instances of mdadm
4930 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
4931 * devices that have since been assimilated via
4933 * In the event this update can not be carried out mdadm will
4934 * (FIX ME) notice that its update did not take hold.
4936 struct imsm_update_create_array
*u
= (void *) update
->buf
;
4937 struct intel_dev
*dv
;
4938 struct imsm_dev
*dev
;
4939 struct imsm_map
*map
, *new_map
;
4940 unsigned long long start
, end
;
4941 unsigned long long new_start
, new_end
;
4943 struct disk_info
*inf
;
4946 /* handle racing creates: first come first serve */
4947 if (u
->dev_idx
< mpb
->num_raid_devs
) {
4948 dprintf("%s: subarray %d already defined\n",
4949 __func__
, u
->dev_idx
);
4953 /* check update is next in sequence */
4954 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
4955 dprintf("%s: can not create array %d expected index %d\n",
4956 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
4960 new_map
= get_imsm_map(&u
->dev
, 0);
4961 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
4962 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
4963 inf
= get_disk_info(u
);
4965 /* handle activate_spare versus create race:
4966 * check to make sure that overlapping arrays do not include
4969 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4970 dev
= get_imsm_dev(super
, i
);
4971 map
= get_imsm_map(dev
, 0);
4972 start
= __le32_to_cpu(map
->pba_of_lba0
);
4973 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
4974 if ((new_start
>= start
&& new_start
<= end
) ||
4975 (start
>= new_start
&& start
<= new_end
))
4980 if (disks_overlap(super
, i
, u
)) {
4981 dprintf("%s: arrays overlap\n", __func__
);
4986 /* check that prepare update was successful */
4987 if (!update
->space
) {
4988 dprintf("%s: prepare update failed\n", __func__
);
4992 /* check that all disks are still active before committing
4993 * changes. FIXME: could we instead handle this by creating a
4994 * degraded array? That's probably not what the user expects,
4995 * so better to drop this update on the floor.
4997 for (i
= 0; i
< new_map
->num_members
; i
++) {
4998 dl
= serial_to_dl(inf
[i
].serial
, super
);
5000 dprintf("%s: disk disappeared\n", __func__
);
5005 super
->updates_pending
++;
5007 /* convert spares to members and fixup ord_tbl */
5008 for (i
= 0; i
< new_map
->num_members
; i
++) {
5009 dl
= serial_to_dl(inf
[i
].serial
, super
);
5010 if (dl
->index
== -1) {
5011 dl
->index
= mpb
->num_disks
;
5013 dl
->disk
.status
|= CONFIGURED_DISK
;
5014 dl
->disk
.status
&= ~SPARE_DISK
;
5016 set_imsm_ord_tbl_ent(new_map
, i
, dl
->index
);
5021 update
->space
= NULL
;
5022 imsm_copy_dev(dev
, &u
->dev
);
5023 dv
->index
= u
->dev_idx
;
5024 dv
->next
= super
->devlist
;
5025 super
->devlist
= dv
;
5026 mpb
->num_raid_devs
++;
5028 imsm_update_version_info(super
);
5031 /* mdmon knows how to release update->space, but not
5032 * ((struct intel_dev *) update->space)->dev
5034 if (update
->space
) {
5040 case update_add_disk
:
5042 /* we may be able to repair some arrays if disks are
5045 struct active_array
*a
;
5047 super
->updates_pending
++;
5048 for (a
= st
->arrays
; a
; a
= a
->next
)
5049 a
->check_degraded
= 1;
5051 /* add some spares to the metadata */
5052 while (super
->add
) {
5056 super
->add
= al
->next
;
5057 al
->next
= super
->disks
;
5059 dprintf("%s: added %x:%x\n",
5060 __func__
, al
->major
, al
->minor
);
5067 static void imsm_prepare_update(struct supertype
*st
,
5068 struct metadata_update
*update
)
5071 * Allocate space to hold new disk entries, raid-device entries or a new
5072 * mpb if necessary. The manager synchronously waits for updates to
5073 * complete in the monitor, so new mpb buffers allocated here can be
5074 * integrated by the monitor thread without worrying about live pointers
5075 * in the manager thread.
5077 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
5078 struct intel_super
*super
= st
->sb
;
5079 struct imsm_super
*mpb
= super
->anchor
;
5084 case update_create_array
: {
5085 struct imsm_update_create_array
*u
= (void *) update
->buf
;
5086 struct intel_dev
*dv
;
5087 struct imsm_dev
*dev
= &u
->dev
;
5088 struct imsm_map
*map
= get_imsm_map(dev
, 0);
5090 struct disk_info
*inf
;
5094 inf
= get_disk_info(u
);
5095 len
= sizeof_imsm_dev(dev
, 1);
5096 /* allocate a new super->devlist entry */
5097 dv
= malloc(sizeof(*dv
));
5099 dv
->dev
= malloc(len
);
5104 update
->space
= NULL
;
5108 /* count how many spares will be converted to members */
5109 for (i
= 0; i
< map
->num_members
; i
++) {
5110 dl
= serial_to_dl(inf
[i
].serial
, super
);
5112 /* hmm maybe it failed?, nothing we can do about
5117 if (count_memberships(dl
, super
) == 0)
5120 len
+= activate
* sizeof(struct imsm_disk
);
5127 /* check if we need a larger metadata buffer */
5128 if (super
->next_buf
)
5129 buf_len
= super
->next_len
;
5131 buf_len
= super
->len
;
5133 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
5134 /* ok we need a larger buf than what is currently allocated
5135 * if this allocation fails process_update will notice that
5136 * ->next_len is set and ->next_buf is NULL
5138 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
5139 if (super
->next_buf
)
5140 free(super
->next_buf
);
5142 super
->next_len
= buf_len
;
5143 if (posix_memalign(&super
->next_buf
, 512, buf_len
) == 0)
5144 memset(super
->next_buf
, 0, buf_len
);
5146 super
->next_buf
= NULL
;
5150 /* must be called while manager is quiesced */
5151 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
)
5153 struct imsm_super
*mpb
= super
->anchor
;
5155 struct imsm_dev
*dev
;
5156 struct imsm_map
*map
;
5157 int i
, j
, num_members
;
5160 dprintf("%s: deleting device[%d] from imsm_super\n",
5163 /* shift all indexes down one */
5164 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
5165 if (iter
->index
> index
)
5167 for (iter
= super
->missing
; iter
; iter
= iter
->next
)
5168 if (iter
->index
> index
)
5171 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
5172 dev
= get_imsm_dev(super
, i
);
5173 map
= get_imsm_map(dev
, 0);
5174 num_members
= map
->num_members
;
5175 for (j
= 0; j
< num_members
; j
++) {
5176 /* update ord entries being careful not to propagate
5177 * ord-flags to the first map
5179 ord
= get_imsm_ord_tbl_ent(dev
, j
);
5181 if (ord_to_idx(ord
) <= index
)
5184 map
= get_imsm_map(dev
, 0);
5185 set_imsm_ord_tbl_ent(map
, j
, ord_to_idx(ord
- 1));
5186 map
= get_imsm_map(dev
, 1);
5188 set_imsm_ord_tbl_ent(map
, j
, ord
- 1);
5193 super
->updates_pending
++;
5195 struct dl
*dl
= *dlp
;
5197 *dlp
= (*dlp
)->next
;
5198 __free_imsm_disk(dl
);
5201 #endif /* MDASSEMBLE */
5203 struct superswitch super_imsm
= {
5205 .examine_super
= examine_super_imsm
,
5206 .brief_examine_super
= brief_examine_super_imsm
,
5207 .brief_examine_subarrays
= brief_examine_subarrays_imsm
,
5208 .export_examine_super
= export_examine_super_imsm
,
5209 .detail_super
= detail_super_imsm
,
5210 .brief_detail_super
= brief_detail_super_imsm
,
5211 .write_init_super
= write_init_super_imsm
,
5212 .validate_geometry
= validate_geometry_imsm
,
5213 .add_to_super
= add_to_super_imsm
,
5214 .detail_platform
= detail_platform_imsm
,
5216 .match_home
= match_home_imsm
,
5217 .uuid_from_super
= uuid_from_super_imsm
,
5218 .getinfo_super
= getinfo_super_imsm
,
5219 .update_super
= update_super_imsm
,
5221 .avail_size
= avail_size_imsm
,
5223 .compare_super
= compare_super_imsm
,
5225 .load_super
= load_super_imsm
,
5226 .init_super
= init_super_imsm
,
5227 .store_super
= store_super_imsm
,
5228 .free_super
= free_super_imsm
,
5229 .match_metadata_desc
= match_metadata_desc_imsm
,
5230 .container_content
= container_content_imsm
,
5231 .default_layout
= imsm_level_to_layout
,
5238 .open_new
= imsm_open_new
,
5239 .load_super
= load_super_imsm
,
5240 .set_array_state
= imsm_set_array_state
,
5241 .set_disk
= imsm_set_disk
,
5242 .sync_metadata
= imsm_sync_metadata
,
5243 .activate_spare
= imsm_activate_spare
,
5244 .process_update
= imsm_process_update
,
5245 .prepare_update
= imsm_prepare_update
,
5246 #endif /* MDASSEMBLE */