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
57 /* Disk configuration info. */
58 #define IMSM_MAX_DEVICES 255
60 __u8 serial
[MAX_RAID_SERIAL_LEN
];/* 0xD8 - 0xE7 ascii serial number */
61 __u32 total_blocks
; /* 0xE8 - 0xEB total blocks */
62 __u32 scsi_id
; /* 0xEC - 0xEF scsi ID */
63 #define SPARE_DISK __cpu_to_le32(0x01) /* Spare */
64 #define CONFIGURED_DISK __cpu_to_le32(0x02) /* Member of some RaidDev */
65 #define FAILED_DISK __cpu_to_le32(0x04) /* Permanent failure */
66 #define USABLE_DISK __cpu_to_le32(0x08) /* Fully usable unless FAILED_DISK is set */
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 __u8 migr_type
; /* Initializing, Rebuilding, ... */
110 __u8 fs_state
; /* fast-sync state for CnG (0xff == disabled) */
111 __u16 verify_errors
; /* number of mismatches */
112 __u16 bad_blocks
; /* number of bad blocks during verify */
114 struct imsm_map map
[1];
115 /* here comes another one if migr_state */
116 } __attribute__ ((packed
));
119 __u8 volume
[MAX_RAID_SERIAL_LEN
];
122 #define DEV_BOOTABLE __cpu_to_le32(0x01)
123 #define DEV_BOOT_DEVICE __cpu_to_le32(0x02)
124 #define DEV_READ_COALESCING __cpu_to_le32(0x04)
125 #define DEV_WRITE_COALESCING __cpu_to_le32(0x08)
126 #define DEV_LAST_SHUTDOWN_DIRTY __cpu_to_le32(0x10)
127 #define DEV_HIDDEN_AT_BOOT __cpu_to_le32(0x20)
128 #define DEV_CURRENTLY_HIDDEN __cpu_to_le32(0x40)
129 #define DEV_VERIFY_AND_FIX __cpu_to_le32(0x80)
130 #define DEV_MAP_STATE_UNINIT __cpu_to_le32(0x100)
131 #define DEV_NO_AUTO_RECOVERY __cpu_to_le32(0x200)
132 #define DEV_CLONE_N_GO __cpu_to_le32(0x400)
133 #define DEV_CLONE_MAN_SYNC __cpu_to_le32(0x800)
134 #define DEV_CNG_MASTER_DISK_NUM __cpu_to_le32(0x1000)
135 __u32 status
; /* Persistent RaidDev status */
136 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
140 __u8 cng_master_disk
;
144 #define IMSM_DEV_FILLERS 10
145 __u32 filler
[IMSM_DEV_FILLERS
];
147 } __attribute__ ((packed
));
150 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
151 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
152 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
153 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
154 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
155 __u32 error_log_size
; /* 0x30 - 0x33 in bytes */
156 __u32 attributes
; /* 0x34 - 0x37 */
157 __u8 num_disks
; /* 0x38 Number of configured disks */
158 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
159 __u8 error_log_pos
; /* 0x3A */
160 __u8 fill
[1]; /* 0x3B */
161 __u32 cache_size
; /* 0x3c - 0x40 in mb */
162 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
163 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
164 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
165 #define IMSM_FILLERS 35
166 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
167 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
168 /* here comes imsm_dev[num_raid_devs] */
169 /* here comes BBM logs */
170 } __attribute__ ((packed
));
172 #define BBM_LOG_MAX_ENTRIES 254
174 struct bbm_log_entry
{
175 __u64 defective_block_start
;
176 #define UNREADABLE 0xFFFFFFFF
177 __u32 spare_block_offset
;
178 __u16 remapped_marked_count
;
180 } __attribute__ ((__packed__
));
183 __u32 signature
; /* 0xABADB10C */
185 __u32 reserved_spare_block_count
; /* 0 */
186 __u32 reserved
; /* 0xFFFF */
187 __u64 first_spare_lba
;
188 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
189 } __attribute__ ((__packed__
));
193 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
196 static unsigned int sector_count(__u32 bytes
)
198 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
201 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
203 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
207 struct imsm_dev
*dev
;
208 struct intel_dev
*next
;
212 /* internal representation of IMSM metadata */
215 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
216 struct imsm_super
*anchor
; /* immovable parameters */
218 size_t len
; /* size of the 'buf' allocation */
219 void *next_buf
; /* for realloc'ing buf from the manager */
221 int updates_pending
; /* count of pending updates for mdmon */
222 int creating_imsm
; /* flag to indicate container creation */
223 int current_vol
; /* index of raid device undergoing creation */
224 __u32 create_offset
; /* common start for 'current_vol' */
225 struct intel_dev
*devlist
;
229 __u8 serial
[MAX_RAID_SERIAL_LEN
];
232 struct imsm_disk disk
;
235 struct extent
*e
; /* for determining freespace @ create */
236 int raiddisk
; /* slot to fill in autolayout */
238 struct dl
*add
; /* list of disks to add while mdmon active */
239 struct dl
*missing
; /* disks removed while we weren't looking */
240 struct bbm_log
*bbm_log
;
241 const char *hba
; /* device path of the raid controller for this metadata */
242 const struct imsm_orom
*orom
; /* platform firmware support */
246 unsigned long long start
, size
;
249 /* definition of messages passed to imsm_process_update */
250 enum imsm_update_type
{
251 update_activate_spare
,
256 struct imsm_update_activate_spare
{
257 enum imsm_update_type type
;
261 struct imsm_update_activate_spare
*next
;
265 __u8 serial
[MAX_RAID_SERIAL_LEN
];
268 struct imsm_update_create_array
{
269 enum imsm_update_type type
;
274 struct imsm_update_add_disk
{
275 enum imsm_update_type type
;
278 static struct supertype
*match_metadata_desc_imsm(char *arg
)
280 struct supertype
*st
;
282 if (strcmp(arg
, "imsm") != 0 &&
283 strcmp(arg
, "default") != 0
287 st
= malloc(sizeof(*st
));
288 memset(st
, 0, sizeof(*st
));
289 st
->ss
= &super_imsm
;
290 st
->max_devs
= IMSM_MAX_DEVICES
;
291 st
->minor_version
= 0;
297 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
299 return &mpb
->sig
[MPB_SIG_LEN
];
303 /* retrieve a disk directly from the anchor when the anchor is known to be
304 * up-to-date, currently only at load time
306 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
308 if (index
>= mpb
->num_disks
)
310 return &mpb
->disk
[index
];
314 /* retrieve a disk from the parsed metadata */
315 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
319 for (d
= super
->disks
; d
; d
= d
->next
)
320 if (d
->index
== index
)
327 /* generate a checksum directly from the anchor when the anchor is known to be
328 * up-to-date, currently only at load or write_super after coalescing
330 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
332 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
333 __u32
*p
= (__u32
*) mpb
;
337 sum
+= __le32_to_cpu(*p
);
341 return sum
- __le32_to_cpu(mpb
->check_sum
);
344 static size_t sizeof_imsm_map(struct imsm_map
*map
)
346 return sizeof(struct imsm_map
) + sizeof(__u32
) * (map
->num_members
- 1);
349 struct imsm_map
*get_imsm_map(struct imsm_dev
*dev
, int second_map
)
351 struct imsm_map
*map
= &dev
->vol
.map
[0];
353 if (second_map
&& !dev
->vol
.migr_state
)
355 else if (second_map
) {
358 return ptr
+ sizeof_imsm_map(map
);
364 /* return the size of the device.
365 * migr_state increases the returned size if map[0] were to be duplicated
367 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
, int migr_state
)
369 size_t size
= sizeof(*dev
) - sizeof(struct imsm_map
) +
370 sizeof_imsm_map(get_imsm_map(dev
, 0));
372 /* migrating means an additional map */
373 if (dev
->vol
.migr_state
)
374 size
+= sizeof_imsm_map(get_imsm_map(dev
, 1));
376 size
+= sizeof_imsm_map(get_imsm_map(dev
, 0));
382 /* retrieve disk serial number list from a metadata update */
383 static struct disk_info
*get_disk_info(struct imsm_update_create_array
*update
)
386 struct disk_info
*inf
;
388 inf
= u
+ sizeof(*update
) - sizeof(struct imsm_dev
) +
389 sizeof_imsm_dev(&update
->dev
, 0);
395 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
401 if (index
>= mpb
->num_raid_devs
)
404 /* devices start after all disks */
405 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
407 for (i
= 0; i
<= index
; i
++)
409 return _mpb
+ offset
;
411 offset
+= sizeof_imsm_dev(_mpb
+ offset
, 0);
416 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
418 struct intel_dev
*dv
;
420 if (index
>= super
->anchor
->num_raid_devs
)
422 for (dv
= super
->devlist
; dv
; dv
= dv
->next
)
423 if (dv
->index
== index
)
428 static __u32
get_imsm_ord_tbl_ent(struct imsm_dev
*dev
, int slot
)
430 struct imsm_map
*map
;
432 if (dev
->vol
.migr_state
)
433 map
= get_imsm_map(dev
, 1);
435 map
= get_imsm_map(dev
, 0);
437 /* top byte identifies disk under rebuild */
438 return __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
441 #define ord_to_idx(ord) (((ord) << 8) >> 8)
442 static __u32
get_imsm_disk_idx(struct imsm_dev
*dev
, int slot
)
444 __u32 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
446 return ord_to_idx(ord
);
449 static void set_imsm_ord_tbl_ent(struct imsm_map
*map
, int slot
, __u32 ord
)
451 map
->disk_ord_tbl
[slot
] = __cpu_to_le32(ord
);
454 static int get_imsm_disk_slot(struct imsm_map
*map
, int idx
)
459 for (slot
= 0; slot
< map
->num_members
; slot
++) {
460 ord
= __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
461 if (ord_to_idx(ord
) == idx
)
468 static int get_imsm_raid_level(struct imsm_map
*map
)
470 if (map
->raid_level
== 1) {
471 if (map
->num_members
== 2)
477 return map
->raid_level
;
480 static int cmp_extent(const void *av
, const void *bv
)
482 const struct extent
*a
= av
;
483 const struct extent
*b
= bv
;
484 if (a
->start
< b
->start
)
486 if (a
->start
> b
->start
)
491 static int count_memberships(struct dl
*dl
, struct intel_super
*super
)
496 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
497 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
498 struct imsm_map
*map
= get_imsm_map(dev
, 0);
500 if (get_imsm_disk_slot(map
, dl
->index
) >= 0)
507 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
509 /* find a list of used extents on the given physical device */
510 struct extent
*rv
, *e
;
512 int memberships
= count_memberships(dl
, super
);
513 __u32 reservation
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
515 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
520 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
521 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
522 struct imsm_map
*map
= get_imsm_map(dev
, 0);
524 if (get_imsm_disk_slot(map
, dl
->index
) >= 0) {
525 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
526 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
530 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
532 /* determine the start of the metadata
533 * when no raid devices are defined use the default
534 * ...otherwise allow the metadata to truncate the value
535 * as is the case with older versions of imsm
538 struct extent
*last
= &rv
[memberships
- 1];
541 remainder
= __le32_to_cpu(dl
->disk
.total_blocks
) -
542 (last
->start
+ last
->size
);
543 /* round down to 1k block to satisfy precision of the kernel
547 /* make sure remainder is still sane */
548 if (remainder
< ROUND_UP(super
->len
, 512) >> 9)
549 remainder
= ROUND_UP(super
->len
, 512) >> 9;
550 if (reservation
> remainder
)
551 reservation
= remainder
;
553 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) - reservation
;
558 /* try to determine how much space is reserved for metadata from
559 * the last get_extents() entry, otherwise fallback to the
562 static __u32
imsm_reserved_sectors(struct intel_super
*super
, struct dl
*dl
)
568 /* for spares just return a minimal reservation which will grow
569 * once the spare is picked up by an array
572 return MPB_SECTOR_CNT
;
574 e
= get_extents(super
, dl
);
576 return MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
578 /* scroll to last entry */
579 for (i
= 0; e
[i
].size
; i
++)
582 rv
= __le32_to_cpu(dl
->disk
.total_blocks
) - e
[i
].start
;
590 static void print_imsm_dev(struct imsm_dev
*dev
, char *uuid
, int disk_idx
)
594 struct imsm_map
*map
= get_imsm_map(dev
, 0);
598 printf("[%.16s]:\n", dev
->volume
);
599 printf(" UUID : %s\n", uuid
);
600 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
601 printf(" Members : %d\n", map
->num_members
);
602 slot
= get_imsm_disk_slot(map
, disk_idx
);
604 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
605 printf(" This Slot : %d%s\n", slot
,
606 ord
& IMSM_ORD_REBUILD
? " (out-of-sync)" : "");
608 printf(" This Slot : ?\n");
609 sz
= __le32_to_cpu(dev
->size_high
);
611 sz
+= __le32_to_cpu(dev
->size_low
);
612 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
613 human_size(sz
* 512));
614 sz
= __le32_to_cpu(map
->blocks_per_member
);
615 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
616 human_size(sz
* 512));
617 printf(" Sector Offset : %u\n",
618 __le32_to_cpu(map
->pba_of_lba0
));
619 printf(" Num Stripes : %u\n",
620 __le32_to_cpu(map
->num_data_stripes
));
621 printf(" Chunk Size : %u KiB\n",
622 __le16_to_cpu(map
->blocks_per_strip
) / 2);
623 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
624 printf(" Migrate State : %s", dev
->vol
.migr_state
? "migrating" : "idle");
625 if (dev
->vol
.migr_state
)
626 printf(": %s", dev
->vol
.migr_type
? "rebuilding" : "initializing");
628 printf(" Map State : %s", map_state_str
[map
->map_state
]);
629 if (dev
->vol
.migr_state
) {
630 struct imsm_map
*map
= get_imsm_map(dev
, 1);
631 printf(" <-- %s", map_state_str
[map
->map_state
]);
634 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
637 static void print_imsm_disk(struct imsm_super
*mpb
, int index
, __u32 reserved
)
639 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
640 char str
[MAX_RAID_SERIAL_LEN
+ 1];
648 snprintf(str
, MAX_RAID_SERIAL_LEN
+ 1, "%s", disk
->serial
);
649 printf(" Disk%02d Serial : %s\n", index
, str
);
651 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
652 s
&CONFIGURED_DISK
? " active" : "",
653 s
&FAILED_DISK
? " failed" : "",
654 s
&USABLE_DISK
? " usable" : "");
655 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
656 sz
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
657 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
658 human_size(sz
* 512));
661 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
);
663 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
665 struct intel_super
*super
= st
->sb
;
666 struct imsm_super
*mpb
= super
->anchor
;
667 char str
[MAX_SIGNATURE_LENGTH
];
672 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
675 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
676 printf(" Magic : %s\n", str
);
677 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
678 printf(" Version : %s\n", get_imsm_version(mpb
));
679 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
680 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
681 getinfo_super_imsm(st
, &info
);
682 fname_from_uuid(st
, &info
, nbuf
,'-');
683 printf(" UUID : %s\n", nbuf
+ 5);
684 sum
= __le32_to_cpu(mpb
->check_sum
);
685 printf(" Checksum : %08x %s\n", sum
,
686 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
687 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
688 printf(" Disks : %d\n", mpb
->num_disks
);
689 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
690 print_imsm_disk(mpb
, super
->disks
->index
, reserved
);
691 if (super
->bbm_log
) {
692 struct bbm_log
*log
= super
->bbm_log
;
695 printf("Bad Block Management Log:\n");
696 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
697 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
698 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
699 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
700 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
702 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
704 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
706 super
->current_vol
= i
;
707 getinfo_super_imsm(st
, &info
);
708 fname_from_uuid(st
, &info
, nbuf
, '-');
709 print_imsm_dev(dev
, nbuf
+ 5, super
->disks
->index
);
711 for (i
= 0; i
< mpb
->num_disks
; i
++) {
712 if (i
== super
->disks
->index
)
714 print_imsm_disk(mpb
, i
, reserved
);
718 static void brief_examine_super_imsm(struct supertype
*st
)
720 /* We just write a generic IMSM ARRAY entry */
724 struct intel_super
*super
= st
->sb
;
727 if (!super
->anchor
->num_raid_devs
)
730 getinfo_super_imsm(st
, &info
);
731 fname_from_uuid(st
, &info
, nbuf
,'-');
732 printf("ARRAY metadata=imsm auto=md UUID=%s\n", nbuf
+ 5);
733 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
734 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
736 super
->current_vol
= i
;
737 getinfo_super_imsm(st
, &info
);
738 fname_from_uuid(st
, &info
, nbuf1
,'-');
739 printf("ARRAY /dev/md/%.16s container=%s\n"
740 " member=%d auto=mdp UUID=%s\n",
741 dev
->volume
, nbuf
+ 5, i
, nbuf1
+ 5);
745 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
750 getinfo_super_imsm(st
, &info
);
751 fname_from_uuid(st
, &info
, nbuf
,'-');
752 printf("\n UUID : %s\n", nbuf
+ 5);
755 static void brief_detail_super_imsm(struct supertype
*st
)
759 getinfo_super_imsm(st
, &info
);
760 fname_from_uuid(st
, &info
, nbuf
,'-');
761 printf(" UUID=%s", nbuf
+ 5);
764 static int imsm_read_serial(int fd
, char *devname
, __u8
*serial
);
765 static void fd2devname(int fd
, char *name
);
767 static int imsm_enumerate_ports(const char *hba_path
, int port_count
, int host_base
, int verbose
)
769 /* dump an unsorted list of devices attached to ahci, as well as
770 * non-connected ports
772 int hba_len
= strlen(hba_path
) + 1;
777 unsigned long port_mask
= (1 << port_count
) - 1;
779 if (port_count
> sizeof(port_mask
) * 8) {
781 fprintf(stderr
, Name
": port_count %d out of range\n", port_count
);
785 /* scroll through /sys/dev/block looking for devices attached to
788 dir
= opendir("/sys/dev/block");
789 for (ent
= dir
? readdir(dir
) : NULL
; ent
; ent
= readdir(dir
)) {
800 if (sscanf(ent
->d_name
, "%d:%d", &major
, &minor
) != 2)
802 path
= devt_to_devpath(makedev(major
, minor
));
805 if (!path_attached_to_hba(path
, hba_path
)) {
811 /* retrieve the scsi device type */
812 if (asprintf(&device
, "/sys/dev/block/%d:%d/device/xxxxxxx", major
, minor
) < 0) {
814 fprintf(stderr
, Name
": failed to allocate 'device'\n");
818 sprintf(device
, "/sys/dev/block/%d:%d/device/type", major
, minor
);
819 if (load_sys(device
, buf
) != 0) {
821 fprintf(stderr
, Name
": failed to read device type for %s\n",
827 type
= strtoul(buf
, NULL
, 10);
829 /* if it's not a disk print the vendor and model */
830 if (!(type
== 0 || type
== 7 || type
== 14)) {
833 sprintf(device
, "/sys/dev/block/%d:%d/device/vendor", major
, minor
);
834 if (load_sys(device
, buf
) == 0) {
835 strncpy(vendor
, buf
, sizeof(vendor
));
836 vendor
[sizeof(vendor
) - 1] = '\0';
837 c
= (char *) &vendor
[sizeof(vendor
) - 1];
838 while (isspace(*c
) || *c
== '\0')
842 sprintf(device
, "/sys/dev/block/%d:%d/device/model", major
, minor
);
843 if (load_sys(device
, buf
) == 0) {
844 strncpy(model
, buf
, sizeof(model
));
845 model
[sizeof(model
) - 1] = '\0';
846 c
= (char *) &model
[sizeof(model
) - 1];
847 while (isspace(*c
) || *c
== '\0')
851 if (vendor
[0] && model
[0])
852 sprintf(buf
, "%.64s %.64s", vendor
, model
);
854 switch (type
) { /* numbers from hald/linux/device.c */
855 case 1: sprintf(buf
, "tape"); break;
856 case 2: sprintf(buf
, "printer"); break;
857 case 3: sprintf(buf
, "processor"); break;
859 case 5: sprintf(buf
, "cdrom"); break;
860 case 6: sprintf(buf
, "scanner"); break;
861 case 8: sprintf(buf
, "media_changer"); break;
862 case 9: sprintf(buf
, "comm"); break;
863 case 12: sprintf(buf
, "raid"); break;
864 default: sprintf(buf
, "unknown");
870 /* chop device path to 'host%d' and calculate the port number */
871 c
= strchr(&path
[hba_len
], '/');
873 if (sscanf(&path
[hba_len
], "host%d", &port
) == 1)
877 *c
= '/'; /* repair the full string */
878 fprintf(stderr
, Name
": failed to determine port number for %s\n",
885 /* mark this port as used */
886 port_mask
&= ~(1 << port
);
888 /* print out the device information */
890 printf(" Port%d : - non-disk device (%s) -\n", port
, buf
);
894 fd
= dev_open(ent
->d_name
, O_RDONLY
);
896 printf(" Port%d : - disk info unavailable -\n", port
);
899 printf(" Port%d : %s", port
, buf
);
900 if (imsm_read_serial(fd
, NULL
, (__u8
*) buf
) == 0)
901 printf(" (%s)\n", buf
);
916 for (i
= 0; i
< port_count
; i
++)
917 if (port_mask
& (1 << i
))
918 printf(" Port%d : - no device attached -\n", i
);
924 static int detail_platform_imsm(int verbose
, int enumerate_only
)
926 /* There are two components to imsm platform support, the ahci SATA
927 * controller and the option-rom. To find the SATA controller we
928 * simply look in /sys/bus/pci/drivers/ahci to see if an ahci
929 * controller with the Intel vendor id is present. This approach
930 * allows mdadm to leverage the kernel's ahci detection logic, with the
931 * caveat that if ahci.ko is not loaded mdadm will not be able to
932 * detect platform raid capabilities. The option-rom resides in a
933 * platform "Adapter ROM". We scan for its signature to retrieve the
934 * platform capabilities. If raid support is disabled in the BIOS the
935 * option-rom capability structure will not be available.
937 const struct imsm_orom
*orom
;
938 struct sys_dev
*list
, *hba
;
941 const char *hba_path
;
945 if (enumerate_only
) {
946 if (check_env("IMSM_NO_PLATFORM") || find_imsm_orom())
951 list
= find_driver_devices("pci", "ahci");
952 for (hba
= list
; hba
; hba
= hba
->next
)
953 if (devpath_to_vendor(hba
->path
) == 0x8086)
958 fprintf(stderr
, Name
": unable to find active ahci controller\n");
962 fprintf(stderr
, Name
": found Intel SATA AHCI Controller\n");
963 hba_path
= hba
->path
;
967 orom
= find_imsm_orom();
970 fprintf(stderr
, Name
": imsm option-rom not found\n");
974 printf(" Platform : Intel(R) Matrix Storage Manager\n");
975 printf(" Version : %d.%d.%d.%d\n", orom
->major_ver
, orom
->minor_ver
,
976 orom
->hotfix_ver
, orom
->build
);
977 printf(" RAID Levels :%s%s%s%s%s\n",
978 imsm_orom_has_raid0(orom
) ? " raid0" : "",
979 imsm_orom_has_raid1(orom
) ? " raid1" : "",
980 imsm_orom_has_raid1e(orom
) ? " raid1e" : "",
981 imsm_orom_has_raid10(orom
) ? " raid10" : "",
982 imsm_orom_has_raid5(orom
) ? " raid5" : "");
983 printf(" Max Disks : %d\n", orom
->tds
);
984 printf(" Max Volumes : %d\n", orom
->vpa
);
985 printf(" I/O Controller : %s\n", hba_path
);
987 /* find the smallest scsi host number to determine a port number base */
988 dir
= opendir(hba_path
);
989 for (ent
= dir
? readdir(dir
) : NULL
; ent
; ent
= readdir(dir
)) {
992 if (sscanf(ent
->d_name
, "host%d", &host
) != 1)
996 else if (host
< host_base
)
999 if (host
+ 1 > port_count
+ host_base
)
1000 port_count
= host
+ 1 - host_base
;
1006 if (!port_count
|| imsm_enumerate_ports(hba_path
, port_count
,
1007 host_base
, verbose
) != 0) {
1009 fprintf(stderr
, Name
": failed to enumerate ports\n");
1017 static int match_home_imsm(struct supertype
*st
, char *homehost
)
1019 /* the imsm metadata format does not specify any host
1020 * identification information. We return -1 since we can never
1021 * confirm nor deny whether a given array is "meant" for this
1022 * host. We rely on compare_super and the 'family_num' field to
1023 * exclude member disks that do not belong, and we rely on
1024 * mdadm.conf to specify the arrays that should be assembled.
1025 * Auto-assembly may still pick up "foreign" arrays.
1031 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
1033 /* The uuid returned here is used for:
1034 * uuid to put into bitmap file (Create, Grow)
1035 * uuid for backup header when saving critical section (Grow)
1036 * comparing uuids when re-adding a device into an array
1037 * In these cases the uuid required is that of the data-array,
1038 * not the device-set.
1039 * uuid to recognise same set when adding a missing device back
1040 * to an array. This is a uuid for the device-set.
1042 * For each of these we can make do with a truncated
1043 * or hashed uuid rather than the original, as long as
1045 * In each case the uuid required is that of the data-array,
1046 * not the device-set.
1048 /* imsm does not track uuid's so we synthesis one using sha1 on
1049 * - The signature (Which is constant for all imsm array, but no matter)
1050 * - the family_num of the container
1051 * - the index number of the volume
1052 * - the 'serial' number of the volume.
1053 * Hopefully these are all constant.
1055 struct intel_super
*super
= st
->sb
;
1058 struct sha1_ctx ctx
;
1059 struct imsm_dev
*dev
= NULL
;
1061 sha1_init_ctx(&ctx
);
1062 sha1_process_bytes(super
->anchor
->sig
, MPB_SIG_LEN
, &ctx
);
1063 sha1_process_bytes(&super
->anchor
->family_num
, sizeof(__u32
), &ctx
);
1064 if (super
->current_vol
>= 0)
1065 dev
= get_imsm_dev(super
, super
->current_vol
);
1067 __u32 vol
= super
->current_vol
;
1068 sha1_process_bytes(&vol
, sizeof(vol
), &ctx
);
1069 sha1_process_bytes(dev
->volume
, MAX_RAID_SERIAL_LEN
, &ctx
);
1071 sha1_finish_ctx(&ctx
, buf
);
1072 memcpy(uuid
, buf
, 4*4);
1077 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
1079 __u8
*v
= get_imsm_version(mpb
);
1080 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
1081 char major
[] = { 0, 0, 0 };
1082 char minor
[] = { 0 ,0, 0 };
1083 char patch
[] = { 0, 0, 0 };
1084 char *ver_parse
[] = { major
, minor
, patch
};
1088 while (*v
!= '\0' && v
< end
) {
1089 if (*v
!= '.' && j
< 2)
1090 ver_parse
[i
][j
++] = *v
;
1098 *m
= strtol(minor
, NULL
, 0);
1099 *p
= strtol(patch
, NULL
, 0);
1103 static int imsm_level_to_layout(int level
)
1111 return ALGORITHM_LEFT_ASYMMETRIC
;
1118 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
1120 struct intel_super
*super
= st
->sb
;
1121 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
1122 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1125 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1126 if (dl
->raiddisk
== info
->disk
.raid_disk
)
1128 info
->container_member
= super
->current_vol
;
1129 info
->array
.raid_disks
= map
->num_members
;
1130 info
->array
.level
= get_imsm_raid_level(map
);
1131 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
1132 info
->array
.md_minor
= -1;
1133 info
->array
.ctime
= 0;
1134 info
->array
.utime
= 0;
1135 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1136 info
->array
.state
= !dev
->vol
.dirty
;
1138 info
->disk
.major
= 0;
1139 info
->disk
.minor
= 0;
1141 info
->disk
.major
= dl
->major
;
1142 info
->disk
.minor
= dl
->minor
;
1145 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
1146 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
1147 memset(info
->uuid
, 0, sizeof(info
->uuid
));
1149 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
1150 info
->resync_start
= 0;
1151 else if (dev
->vol
.migr_state
)
1152 info
->resync_start
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
1154 info
->resync_start
= ~0ULL;
1156 strncpy(info
->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1157 info
->name
[MAX_RAID_SERIAL_LEN
] = 0;
1159 info
->array
.major_version
= -1;
1160 info
->array
.minor_version
= -2;
1161 sprintf(info
->text_version
, "/%s/%d",
1162 devnum2devname(st
->container_dev
),
1163 info
->container_member
);
1164 info
->safe_mode_delay
= 4000; /* 4 secs like the Matrix driver */
1165 uuid_from_super_imsm(st
, info
->uuid
);
1168 /* check the config file to see if we can return a real uuid for this spare */
1169 static void fixup_container_spare_uuid(struct mdinfo
*inf
)
1171 struct mddev_ident_s
*array_list
;
1173 if (inf
->array
.level
!= LEVEL_CONTAINER
||
1174 memcmp(inf
->uuid
, uuid_match_any
, sizeof(int[4])) != 0)
1177 array_list
= conf_get_ident(NULL
);
1179 for (; array_list
; array_list
= array_list
->next
) {
1180 if (array_list
->uuid_set
) {
1181 struct supertype
*_sst
; /* spare supertype */
1182 struct supertype
*_cst
; /* container supertype */
1184 _cst
= array_list
->st
;
1185 _sst
= _cst
->ss
->match_metadata_desc(inf
->text_version
);
1187 memcpy(inf
->uuid
, array_list
->uuid
, sizeof(int[4]));
1195 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
1197 struct intel_super
*super
= st
->sb
;
1198 struct imsm_disk
*disk
;
1201 if (super
->current_vol
>= 0) {
1202 getinfo_super_imsm_volume(st
, info
);
1206 /* Set raid_disks to zero so that Assemble will always pull in valid
1209 info
->array
.raid_disks
= 0;
1210 info
->array
.level
= LEVEL_CONTAINER
;
1211 info
->array
.layout
= 0;
1212 info
->array
.md_minor
= -1;
1213 info
->array
.ctime
= 0; /* N/A for imsm */
1214 info
->array
.utime
= 0;
1215 info
->array
.chunk_size
= 0;
1217 info
->disk
.major
= 0;
1218 info
->disk
.minor
= 0;
1219 info
->disk
.raid_disk
= -1;
1220 info
->reshape_active
= 0;
1221 info
->array
.major_version
= -1;
1222 info
->array
.minor_version
= -2;
1223 strcpy(info
->text_version
, "imsm");
1224 info
->safe_mode_delay
= 0;
1225 info
->disk
.number
= -1;
1226 info
->disk
.state
= 0;
1230 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
1232 disk
= &super
->disks
->disk
;
1233 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
1234 info
->component_size
= reserved
;
1236 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
1237 /* we don't change info->disk.raid_disk here because
1238 * this state will be finalized in mdmon after we have
1239 * found the 'most fresh' version of the metadata
1241 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
1242 info
->disk
.state
|= s
& SPARE_DISK
? 0 : (1 << MD_DISK_SYNC
);
1245 /* only call uuid_from_super_imsm when this disk is part of a populated container,
1246 * ->compare_super may have updated the 'num_raid_devs' field for spares
1248 if (info
->disk
.state
& (1 << MD_DISK_SYNC
) || super
->anchor
->num_raid_devs
)
1249 uuid_from_super_imsm(st
, info
->uuid
);
1251 memcpy(info
->uuid
, uuid_match_any
, sizeof(int[4]));
1252 fixup_container_spare_uuid(info
);
1256 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
1257 char *update
, char *devname
, int verbose
,
1258 int uuid_set
, char *homehost
)
1262 /* For 'assemble' and 'force' we need to return non-zero if any
1263 * change was made. For others, the return value is ignored.
1264 * Update options are:
1265 * force-one : This device looks a bit old but needs to be included,
1266 * update age info appropriately.
1267 * assemble: clear any 'faulty' flag to allow this device to
1269 * force-array: Array is degraded but being forced, mark it clean
1270 * if that will be needed to assemble it.
1272 * newdev: not used ????
1273 * grow: Array has gained a new device - this is currently for
1275 * resync: mark as dirty so a resync will happen.
1276 * name: update the name - preserving the homehost
1278 * Following are not relevant for this imsm:
1279 * sparc2.2 : update from old dodgey metadata
1280 * super-minor: change the preferred_minor number
1281 * summaries: update redundant counters.
1282 * uuid: Change the uuid of the array to match watch is given
1283 * homehost: update the recorded homehost
1284 * _reshape_progress: record new reshape_progress position.
1287 //struct intel_super *super = st->sb;
1288 //struct imsm_super *mpb = super->mpb;
1290 if (strcmp(update
, "grow") == 0) {
1292 if (strcmp(update
, "resync") == 0) {
1293 /* dev->vol.dirty = 1; */
1296 /* IMSM has no concept of UUID or homehost */
1301 static size_t disks_to_mpb_size(int disks
)
1305 size
= sizeof(struct imsm_super
);
1306 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
1307 size
+= 2 * sizeof(struct imsm_dev
);
1308 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
1309 size
+= (4 - 2) * sizeof(struct imsm_map
);
1310 /* 4 possible disk_ord_tbl's */
1311 size
+= 4 * (disks
- 1) * sizeof(__u32
);
1316 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
1318 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
1321 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
1324 static void free_devlist(struct intel_super
*super
)
1326 struct intel_dev
*dv
;
1328 while (super
->devlist
) {
1329 dv
= super
->devlist
->next
;
1330 free(super
->devlist
->dev
);
1331 free(super
->devlist
);
1332 super
->devlist
= dv
;
1336 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
1338 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
1341 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
1345 * 0 same, or first was empty, and second was copied
1346 * 1 second had wrong number
1348 * 3 wrong other info
1350 struct intel_super
*first
= st
->sb
;
1351 struct intel_super
*sec
= tst
->sb
;
1359 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
1362 /* if an anchor does not have num_raid_devs set then it is a free
1365 if (first
->anchor
->num_raid_devs
> 0 &&
1366 sec
->anchor
->num_raid_devs
> 0) {
1367 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
1371 /* if 'first' is a spare promote it to a populated mpb with sec's
1374 if (first
->anchor
->num_raid_devs
== 0 &&
1375 sec
->anchor
->num_raid_devs
> 0) {
1377 struct intel_dev
*dv
;
1378 struct imsm_dev
*dev
;
1380 /* we need to copy raid device info from sec if an allocation
1381 * fails here we don't associate the spare
1383 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++) {
1384 dv
= malloc(sizeof(*dv
));
1387 dev
= malloc(sizeof_imsm_dev(get_imsm_dev(sec
, i
), 1));
1394 dv
->next
= first
->devlist
;
1395 first
->devlist
= dv
;
1397 if (i
<= sec
->anchor
->num_raid_devs
) {
1398 /* allocation failure */
1399 free_devlist(first
);
1400 fprintf(stderr
, "imsm: failed to associate spare\n");
1403 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++)
1404 imsm_copy_dev(get_imsm_dev(first
, i
), get_imsm_dev(sec
, i
));
1406 first
->anchor
->num_raid_devs
= sec
->anchor
->num_raid_devs
;
1407 first
->anchor
->family_num
= sec
->anchor
->family_num
;
1413 static void fd2devname(int fd
, char *name
)
1422 if (fstat(fd
, &st
) != 0)
1424 sprintf(path
, "/sys/dev/block/%d:%d",
1425 major(st
.st_rdev
), minor(st
.st_rdev
));
1427 rv
= readlink(path
, dname
, sizeof(dname
));
1432 nm
= strrchr(dname
, '/');
1434 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
1438 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
1440 static int imsm_read_serial(int fd
, char *devname
,
1441 __u8 serial
[MAX_RAID_SERIAL_LEN
])
1443 unsigned char scsi_serial
[255];
1449 memset(scsi_serial
, 0, sizeof(scsi_serial
));
1451 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
1453 if (rv
&& check_env("IMSM_DEVNAME_AS_SERIAL")) {
1454 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1455 fd2devname(fd
, (char *) serial
);
1462 Name
": Failed to retrieve serial for %s\n",
1467 /* trim leading whitespace */
1468 rsp_len
= scsi_serial
[3];
1472 Name
": Failed to retrieve serial for %s\n",
1476 rsp_buf
= (char *) &scsi_serial
[4];
1481 /* truncate len to the end of rsp_buf if necessary */
1482 if (c
+ MAX_RAID_SERIAL_LEN
> rsp_buf
+ rsp_len
)
1483 len
= rsp_len
- (c
- rsp_buf
);
1485 len
= MAX_RAID_SERIAL_LEN
;
1487 /* initialize the buffer and copy rsp_buf characters */
1488 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1489 memcpy(serial
, c
, len
);
1491 /* trim trailing whitespace starting with the last character copied */
1492 c
= (char *) &serial
[len
- 1];
1493 while (isspace(*c
) || *c
== '\0')
1499 static int serialcmp(__u8
*s1
, __u8
*s2
)
1501 return strncmp((char *) s1
, (char *) s2
, MAX_RAID_SERIAL_LEN
);
1504 static void serialcpy(__u8
*dest
, __u8
*src
)
1506 strncpy((char *) dest
, (char *) src
, MAX_RAID_SERIAL_LEN
);
1509 static struct dl
*serial_to_dl(__u8
*serial
, struct intel_super
*super
)
1513 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1514 if (serialcmp(dl
->serial
, serial
) == 0)
1521 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
1528 __u8 serial
[MAX_RAID_SERIAL_LEN
];
1530 rv
= imsm_read_serial(fd
, devname
, serial
);
1535 /* check if this is a disk we have seen before. it may be a spare in
1536 * super->disks while the current anchor believes it is a raid member,
1537 * check if we need to update dl->index
1539 dl
= serial_to_dl(serial
, super
);
1541 dl
= malloc(sizeof(*dl
));
1548 Name
": failed to allocate disk buffer for %s\n",
1555 dl
->major
= major(stb
.st_rdev
);
1556 dl
->minor
= minor(stb
.st_rdev
);
1557 dl
->next
= super
->disks
;
1558 dl
->fd
= keep_fd
? fd
: -1;
1559 dl
->devname
= devname
? strdup(devname
) : NULL
;
1560 serialcpy(dl
->serial
, serial
);
1563 } else if (keep_fd
) {
1568 /* look up this disk's index in the current anchor */
1569 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
1570 struct imsm_disk
*disk_iter
;
1572 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
1574 if (serialcmp(disk_iter
->serial
, dl
->serial
) == 0) {
1575 dl
->disk
= *disk_iter
;
1576 /* only set index on disks that are a member of a
1577 * populated contianer, i.e. one with raid_devs
1579 if (dl
->disk
.status
& FAILED_DISK
)
1581 else if (dl
->disk
.status
& SPARE_DISK
)
1590 /* no match, maybe a stale failed drive */
1591 if (i
== super
->anchor
->num_disks
&& dl
->index
>= 0) {
1592 dl
->disk
= *__get_imsm_disk(super
->anchor
, dl
->index
);
1593 if (dl
->disk
.status
& FAILED_DISK
)
1604 /* When migrating map0 contains the 'destination' state while map1
1605 * contains the current state. When not migrating map0 contains the
1606 * current state. This routine assumes that map[0].map_state is set to
1607 * the current array state before being called.
1609 * Migration is indicated by one of the following states
1610 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
1611 * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal
1612 * map1state=unitialized)
1613 * 3/ Verify (Resync) (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
1615 * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
1616 * map1state=degraded)
1618 static void migrate(struct imsm_dev
*dev
, __u8 to_state
, int migr_type
)
1620 struct imsm_map
*dest
;
1621 struct imsm_map
*src
= get_imsm_map(dev
, 0);
1623 dev
->vol
.migr_state
= 1;
1624 dev
->vol
.migr_type
= migr_type
;
1625 dev
->vol
.curr_migr_unit
= 0;
1626 dest
= get_imsm_map(dev
, 1);
1628 /* duplicate and then set the target end state in map[0] */
1629 memcpy(dest
, src
, sizeof_imsm_map(src
));
1630 if (migr_type
== MIGR_REBUILD
) {
1634 for (i
= 0; i
< src
->num_members
; i
++) {
1635 ord
= __le32_to_cpu(src
->disk_ord_tbl
[i
]);
1636 set_imsm_ord_tbl_ent(src
, i
, ord_to_idx(ord
));
1640 src
->map_state
= to_state
;
1643 static void end_migration(struct imsm_dev
*dev
, __u8 map_state
)
1645 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1646 struct imsm_map
*prev
= get_imsm_map(dev
, dev
->vol
.migr_state
);
1649 /* merge any IMSM_ORD_REBUILD bits that were not successfully
1650 * completed in the last migration.
1652 * FIXME add support for online capacity expansion and
1653 * raid-level-migration
1655 for (i
= 0; i
< prev
->num_members
; i
++)
1656 map
->disk_ord_tbl
[i
] |= prev
->disk_ord_tbl
[i
];
1658 dev
->vol
.migr_state
= 0;
1659 dev
->vol
.curr_migr_unit
= 0;
1660 map
->map_state
= map_state
;
1664 static int parse_raid_devices(struct intel_super
*super
)
1667 struct imsm_dev
*dev_new
;
1668 size_t len
, len_migr
;
1669 size_t space_needed
= 0;
1670 struct imsm_super
*mpb
= super
->anchor
;
1672 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
1673 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
1674 struct intel_dev
*dv
;
1676 len
= sizeof_imsm_dev(dev_iter
, 0);
1677 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
1679 space_needed
+= len_migr
- len
;
1681 dv
= malloc(sizeof(*dv
));
1684 dev_new
= malloc(len_migr
);
1689 imsm_copy_dev(dev_new
, dev_iter
);
1692 dv
->next
= super
->devlist
;
1693 super
->devlist
= dv
;
1696 /* ensure that super->buf is large enough when all raid devices
1699 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
1702 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
1703 if (posix_memalign(&buf
, 512, len
) != 0)
1706 memcpy(buf
, super
->buf
, len
);
1715 /* retrieve a pointer to the bbm log which starts after all raid devices */
1716 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
1720 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
1722 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
1728 static void __free_imsm(struct intel_super
*super
, int free_disks
);
1730 /* load_imsm_mpb - read matrix metadata
1731 * allocates super->mpb to be freed by free_super
1733 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
1735 unsigned long long dsize
;
1736 unsigned long long sectors
;
1738 struct imsm_super
*anchor
;
1742 get_dev_size(fd
, NULL
, &dsize
);
1744 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
1747 Name
": Cannot seek to anchor block on %s: %s\n",
1748 devname
, strerror(errno
));
1752 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
1755 Name
": Failed to allocate imsm anchor buffer"
1756 " on %s\n", devname
);
1759 if (read(fd
, anchor
, 512) != 512) {
1762 Name
": Cannot read anchor block on %s: %s\n",
1763 devname
, strerror(errno
));
1768 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1771 Name
": no IMSM anchor on %s\n", devname
);
1776 __free_imsm(super
, 0);
1777 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1778 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1781 Name
": unable to allocate %zu byte mpb buffer\n",
1786 memcpy(super
->buf
, anchor
, 512);
1788 sectors
= mpb_sectors(anchor
) - 1;
1791 check_sum
= __gen_imsm_checksum(super
->anchor
);
1792 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1795 Name
": IMSM checksum %x != %x on %s\n",
1797 __le32_to_cpu(super
->anchor
->check_sum
),
1802 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1804 rc
= parse_raid_devices(super
);
1808 /* read the extended mpb */
1809 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1812 Name
": Cannot seek to extended mpb on %s: %s\n",
1813 devname
, strerror(errno
));
1817 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1820 Name
": Cannot read extended mpb on %s: %s\n",
1821 devname
, strerror(errno
));
1825 check_sum
= __gen_imsm_checksum(super
->anchor
);
1826 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1829 Name
": IMSM checksum %x != %x on %s\n",
1830 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1835 /* FIXME the BBM log is disk specific so we cannot use this global
1836 * buffer for all disks. Ok for now since we only look at the global
1837 * bbm_log_size parameter to gate assembly
1839 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1841 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1843 rc
= parse_raid_devices(super
);
1848 static void __free_imsm_disk(struct dl
*d
)
1859 static void free_imsm_disks(struct intel_super
*super
)
1863 while (super
->disks
) {
1865 super
->disks
= d
->next
;
1866 __free_imsm_disk(d
);
1868 while (super
->missing
) {
1870 super
->missing
= d
->next
;
1871 __free_imsm_disk(d
);
1876 /* free all the pieces hanging off of a super pointer */
1877 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1884 free_imsm_disks(super
);
1885 free_devlist(super
);
1887 free((void *) super
->hba
);
1892 static void free_imsm(struct intel_super
*super
)
1894 __free_imsm(super
, 1);
1898 static void free_super_imsm(struct supertype
*st
)
1900 struct intel_super
*super
= st
->sb
;
1909 static struct intel_super
*alloc_super(int creating_imsm
)
1911 struct intel_super
*super
= malloc(sizeof(*super
));
1914 memset(super
, 0, sizeof(*super
));
1915 super
->creating_imsm
= creating_imsm
;
1916 super
->current_vol
= -1;
1917 super
->create_offset
= ~((__u32
) 0);
1918 if (!check_env("IMSM_NO_PLATFORM"))
1919 super
->orom
= find_imsm_orom();
1920 if (super
->orom
&& !check_env("IMSM_TEST_OROM")) {
1921 struct sys_dev
*list
, *ent
;
1923 /* find the first intel ahci controller */
1924 list
= find_driver_devices("pci", "ahci");
1925 for (ent
= list
; ent
; ent
= ent
->next
)
1926 if (devpath_to_vendor(ent
->path
) == 0x8086)
1929 super
->hba
= ent
->path
;
1932 free_sys_dev(&list
);
1940 /* find_missing - helper routine for load_super_imsm_all that identifies
1941 * disks that have disappeared from the system. This routine relies on
1942 * the mpb being uptodate, which it is at load time.
1944 static int find_missing(struct intel_super
*super
)
1947 struct imsm_super
*mpb
= super
->anchor
;
1949 struct imsm_disk
*disk
;
1951 for (i
= 0; i
< mpb
->num_disks
; i
++) {
1952 disk
= __get_imsm_disk(mpb
, i
);
1953 dl
= serial_to_dl(disk
->serial
, super
);
1957 dl
= malloc(sizeof(*dl
));
1963 dl
->devname
= strdup("missing");
1965 serialcpy(dl
->serial
, disk
->serial
);
1968 dl
->next
= super
->missing
;
1969 super
->missing
= dl
;
1975 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1976 char *devname
, int keep_fd
)
1979 struct intel_super
*super
;
1980 struct mdinfo
*sd
, *best
= NULL
;
1986 int devnum
= fd2devnum(fd
);
1988 enum sysfs_read_flags flags
;
1990 flags
= GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
;
1991 if (mdmon_running(devnum
))
1992 flags
|= SKIP_GONE_DEVS
;
1994 /* check if 'fd' an opened container */
1995 sra
= sysfs_read(fd
, 0, flags
);
1999 if (sra
->array
.major_version
!= -1 ||
2000 sra
->array
.minor_version
!= -2 ||
2001 strcmp(sra
->text_version
, "imsm") != 0)
2004 super
= alloc_super(0);
2008 /* find the most up to date disk in this array, skipping spares */
2009 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
2010 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
2011 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
2016 rv
= load_imsm_mpb(dfd
, super
, NULL
);
2018 /* retry the load if we might have raced against mdmon */
2019 if (rv
== 3 && mdmon_running(devnum
))
2020 for (retry
= 0; retry
< 3; retry
++) {
2022 rv
= load_imsm_mpb(dfd
, super
, NULL
);
2029 if (super
->anchor
->num_raid_devs
== 0)
2032 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
2033 if (!best
|| gen
> bestgen
) {
2048 /* load the most up to date anchor */
2049 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
2050 dfd
= dev_open(nm
, O_RDONLY
);
2055 rv
= load_imsm_mpb(dfd
, super
, NULL
);
2062 /* re-parse the disk list with the current anchor */
2063 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
2064 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
2065 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
2070 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
2076 if (find_missing(super
) != 0) {
2081 if (st
->subarray
[0]) {
2082 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
2083 super
->current_vol
= atoi(st
->subarray
);
2089 st
->container_dev
= devnum
;
2090 if (st
->ss
== NULL
) {
2091 st
->ss
= &super_imsm
;
2092 st
->minor_version
= 0;
2093 st
->max_devs
= IMSM_MAX_DEVICES
;
2095 st
->loaded_container
= 1;
2101 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
2103 struct intel_super
*super
;
2107 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
2110 if (st
->subarray
[0])
2111 return 1; /* FIXME */
2113 super
= alloc_super(0);
2116 Name
": malloc of %zu failed.\n",
2121 rv
= load_imsm_mpb(fd
, super
, devname
);
2126 Name
": Failed to load all information "
2127 "sections on %s\n", devname
);
2133 if (st
->ss
== NULL
) {
2134 st
->ss
= &super_imsm
;
2135 st
->minor_version
= 0;
2136 st
->max_devs
= IMSM_MAX_DEVICES
;
2138 st
->loaded_container
= 0;
2143 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
2145 if (info
->level
== 1)
2147 return info
->chunk_size
>> 9;
2150 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
2154 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
2155 if (info
->level
== 1)
2161 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
2163 if (info
->level
== 1)
2164 return info
->size
* 2;
2166 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
2169 static void imsm_update_version_info(struct intel_super
*super
)
2171 /* update the version and attributes */
2172 struct imsm_super
*mpb
= super
->anchor
;
2174 struct imsm_dev
*dev
;
2175 struct imsm_map
*map
;
2178 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2179 dev
= get_imsm_dev(super
, i
);
2180 map
= get_imsm_map(dev
, 0);
2181 if (__le32_to_cpu(dev
->size_high
) > 0)
2182 mpb
->attributes
|= MPB_ATTRIB_2TB
;
2184 /* FIXME detect when an array spans a port multiplier */
2186 mpb
->attributes
|= MPB_ATTRIB_PM
;
2189 if (mpb
->num_raid_devs
> 1 ||
2190 mpb
->attributes
!= MPB_ATTRIB_CHECKSUM_VERIFY
) {
2191 version
= MPB_VERSION_ATTRIBS
;
2192 switch (get_imsm_raid_level(map
)) {
2193 case 0: mpb
->attributes
|= MPB_ATTRIB_RAID0
; break;
2194 case 1: mpb
->attributes
|= MPB_ATTRIB_RAID1
; break;
2195 case 10: mpb
->attributes
|= MPB_ATTRIB_RAID10
; break;
2196 case 5: mpb
->attributes
|= MPB_ATTRIB_RAID5
; break;
2199 if (map
->num_members
>= 5)
2200 version
= MPB_VERSION_5OR6_DISK_ARRAY
;
2201 else if (dev
->status
== DEV_CLONE_N_GO
)
2202 version
= MPB_VERSION_CNG
;
2203 else if (get_imsm_raid_level(map
) == 5)
2204 version
= MPB_VERSION_RAID5
;
2205 else if (map
->num_members
>= 3)
2206 version
= MPB_VERSION_3OR4_DISK_ARRAY
;
2207 else if (get_imsm_raid_level(map
) == 1)
2208 version
= MPB_VERSION_RAID1
;
2210 version
= MPB_VERSION_RAID0
;
2212 strcpy(((char *) mpb
->sig
) + strlen(MPB_SIGNATURE
), version
);
2216 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
2217 unsigned long long size
, char *name
,
2218 char *homehost
, int *uuid
)
2220 /* We are creating a volume inside a pre-existing container.
2221 * so st->sb is already set.
2223 struct intel_super
*super
= st
->sb
;
2224 struct imsm_super
*mpb
= super
->anchor
;
2225 struct intel_dev
*dv
;
2226 struct imsm_dev
*dev
;
2227 struct imsm_vol
*vol
;
2228 struct imsm_map
*map
;
2229 int idx
= mpb
->num_raid_devs
;
2231 unsigned long long array_blocks
;
2232 size_t size_old
, size_new
;
2234 if (super
->orom
&& mpb
->num_raid_devs
>= super
->orom
->vpa
) {
2235 fprintf(stderr
, Name
": This imsm-container already has the "
2236 "maximum of %d volumes\n", super
->orom
->vpa
);
2240 /* ensure the mpb is large enough for the new data */
2241 size_old
= __le32_to_cpu(mpb
->mpb_size
);
2242 size_new
= disks_to_mpb_size(info
->nr_disks
);
2243 if (size_new
> size_old
) {
2245 size_t size_round
= ROUND_UP(size_new
, 512);
2247 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
2248 fprintf(stderr
, Name
": could not allocate new mpb\n");
2251 memcpy(mpb_new
, mpb
, size_old
);
2254 super
->anchor
= mpb_new
;
2255 mpb
->mpb_size
= __cpu_to_le32(size_new
);
2256 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
2258 super
->current_vol
= idx
;
2259 /* when creating the first raid device in this container set num_disks
2260 * to zero, i.e. delete this spare and add raid member devices in
2261 * add_to_super_imsm_volume()
2263 if (super
->current_vol
== 0)
2266 for (i
= 0; i
< super
->current_vol
; i
++) {
2267 dev
= get_imsm_dev(super
, i
);
2268 if (strncmp((char *) dev
->volume
, name
,
2269 MAX_RAID_SERIAL_LEN
) == 0) {
2270 fprintf(stderr
, Name
": '%s' is already defined for this container\n",
2276 sprintf(st
->subarray
, "%d", idx
);
2277 dv
= malloc(sizeof(*dv
));
2279 fprintf(stderr
, Name
": failed to allocate device list entry\n");
2282 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
2285 fprintf(stderr
, Name
": could not allocate raid device\n");
2288 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
2289 if (info
->level
== 1)
2290 array_blocks
= info_to_blocks_per_member(info
);
2292 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
2293 info
->layout
, info
->chunk_size
,
2295 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
2296 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
2297 dev
->status
= __cpu_to_le32(0);
2298 dev
->reserved_blocks
= __cpu_to_le32(0);
2300 vol
->migr_state
= 0;
2301 vol
->migr_type
= MIGR_INIT
;
2303 vol
->curr_migr_unit
= 0;
2304 map
= get_imsm_map(dev
, 0);
2305 map
->pba_of_lba0
= __cpu_to_le32(super
->create_offset
);
2306 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
2307 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
2308 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
2309 map
->failed_disk_num
= ~0;
2310 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
2311 IMSM_T_STATE_NORMAL
;
2313 if (info
->level
== 1 && info
->raid_disks
> 2) {
2314 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
2315 "in a raid1 volume\n");
2318 if (info
->level
== 10) {
2319 map
->raid_level
= 1;
2320 map
->num_domains
= info
->raid_disks
/ 2;
2322 map
->raid_level
= info
->level
;
2323 map
->num_domains
= !!map
->raid_level
;
2326 map
->num_members
= info
->raid_disks
;
2327 for (i
= 0; i
< map
->num_members
; i
++) {
2328 /* initialized in add_to_super */
2329 set_imsm_ord_tbl_ent(map
, i
, 0);
2331 mpb
->num_raid_devs
++;
2334 dv
->index
= super
->current_vol
;
2335 dv
->next
= super
->devlist
;
2336 super
->devlist
= dv
;
2338 imsm_update_version_info(super
);
2343 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
2344 unsigned long long size
, char *name
,
2345 char *homehost
, int *uuid
)
2347 /* This is primarily called by Create when creating a new array.
2348 * We will then get add_to_super called for each component, and then
2349 * write_init_super called to write it out to each device.
2350 * For IMSM, Create can create on fresh devices or on a pre-existing
2352 * To create on a pre-existing array a different method will be called.
2353 * This one is just for fresh drives.
2355 struct intel_super
*super
;
2356 struct imsm_super
*mpb
;
2365 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
2368 super
= alloc_super(1);
2371 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
2372 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
2377 memset(mpb
, 0, mpb_size
);
2379 mpb
->attributes
= MPB_ATTRIB_CHECKSUM_VERIFY
;
2381 version
= (char *) mpb
->sig
;
2382 strcpy(version
, MPB_SIGNATURE
);
2383 version
+= strlen(MPB_SIGNATURE
);
2384 strcpy(version
, MPB_VERSION_RAID0
);
2385 mpb
->mpb_size
= mpb_size
;
2392 static int add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
2393 int fd
, char *devname
)
2395 struct intel_super
*super
= st
->sb
;
2396 struct imsm_super
*mpb
= super
->anchor
;
2398 struct imsm_dev
*dev
;
2399 struct imsm_map
*map
;
2401 dev
= get_imsm_dev(super
, super
->current_vol
);
2402 map
= get_imsm_map(dev
, 0);
2404 if (! (dk
->state
& (1<<MD_DISK_SYNC
))) {
2405 fprintf(stderr
, Name
": %s: Cannot add spare devices to IMSM volume\n",
2411 /* we're doing autolayout so grab the pre-marked (in
2412 * validate_geometry) raid_disk
2414 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2415 if (dl
->raiddisk
== dk
->raid_disk
)
2418 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2419 if (dl
->major
== dk
->major
&&
2420 dl
->minor
== dk
->minor
)
2425 fprintf(stderr
, Name
": %s is not a member of the same container\n", devname
);
2429 /* add a pristine spare to the metadata */
2430 if (dl
->index
< 0) {
2431 dl
->index
= super
->anchor
->num_disks
;
2432 super
->anchor
->num_disks
++;
2434 set_imsm_ord_tbl_ent(map
, dk
->number
, dl
->index
);
2435 dl
->disk
.status
= CONFIGURED_DISK
| USABLE_DISK
;
2437 /* if we are creating the first raid device update the family number */
2438 if (super
->current_vol
== 0) {
2440 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
2441 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
2445 sum
= __gen_imsm_checksum(mpb
);
2446 mpb
->family_num
= __cpu_to_le32(sum
);
2452 static int add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
2453 int fd
, char *devname
)
2455 struct intel_super
*super
= st
->sb
;
2457 unsigned long long size
;
2462 /* if we are on an RAID enabled platform check that the disk is
2463 * attached to the raid controller
2465 if (super
->hba
&& !disk_attached_to_hba(fd
, super
->hba
)) {
2467 Name
": %s is not attached to the raid controller: %s\n",
2468 devname
? : "disk", super
->hba
);
2472 if (super
->current_vol
>= 0)
2473 return add_to_super_imsm_volume(st
, dk
, fd
, devname
);
2476 dd
= malloc(sizeof(*dd
));
2479 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
2482 memset(dd
, 0, sizeof(*dd
));
2483 dd
->major
= major(stb
.st_rdev
);
2484 dd
->minor
= minor(stb
.st_rdev
);
2486 dd
->devname
= devname
? strdup(devname
) : NULL
;
2489 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
2492 Name
": failed to retrieve scsi serial, aborting\n");
2497 get_dev_size(fd
, NULL
, &size
);
2499 serialcpy(dd
->disk
.serial
, dd
->serial
);
2500 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
2501 dd
->disk
.status
= USABLE_DISK
| SPARE_DISK
;
2502 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
2503 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
2505 dd
->disk
.scsi_id
= __cpu_to_le32(0);
2507 if (st
->update_tail
) {
2508 dd
->next
= super
->add
;
2511 dd
->next
= super
->disks
;
2518 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
2520 /* spare records have their own family number and do not have any defined raid
2523 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
2525 struct imsm_super mpb_save
;
2526 struct imsm_super
*mpb
= super
->anchor
;
2531 mpb
->num_raid_devs
= 0;
2533 mpb
->mpb_size
= sizeof(struct imsm_super
);
2534 mpb
->generation_num
= __cpu_to_le32(1UL);
2536 for (d
= super
->disks
; d
; d
= d
->next
) {
2540 mpb
->disk
[0] = d
->disk
;
2541 sum
= __gen_imsm_checksum(mpb
);
2542 mpb
->family_num
= __cpu_to_le32(sum
);
2543 sum
= __gen_imsm_checksum(mpb
);
2544 mpb
->check_sum
= __cpu_to_le32(sum
);
2546 if (store_imsm_mpb(d
->fd
, super
)) {
2547 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
2548 __func__
, d
->major
, d
->minor
, strerror(errno
));
2562 static int write_super_imsm(struct intel_super
*super
, int doclose
)
2564 struct imsm_super
*mpb
= super
->anchor
;
2570 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
2572 /* 'generation' is incremented everytime the metadata is written */
2573 generation
= __le32_to_cpu(mpb
->generation_num
);
2575 mpb
->generation_num
= __cpu_to_le32(generation
);
2577 mpb_size
+= sizeof(struct imsm_disk
) * mpb
->num_disks
;
2578 for (d
= super
->disks
; d
; d
= d
->next
) {
2582 mpb
->disk
[d
->index
] = d
->disk
;
2584 for (d
= super
->missing
; d
; d
= d
->next
)
2585 mpb
->disk
[d
->index
] = d
->disk
;
2587 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2588 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
2590 imsm_copy_dev(dev
, get_imsm_dev(super
, i
));
2591 mpb_size
+= sizeof_imsm_dev(dev
, 0);
2593 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
2594 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
2596 /* recalculate checksum */
2597 sum
= __gen_imsm_checksum(mpb
);
2598 mpb
->check_sum
= __cpu_to_le32(sum
);
2600 /* write the mpb for disks that compose raid devices */
2601 for (d
= super
->disks
; d
; d
= d
->next
) {
2604 if (store_imsm_mpb(d
->fd
, super
))
2605 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
2606 __func__
, d
->major
, d
->minor
, strerror(errno
));
2614 return write_super_imsm_spares(super
, doclose
);
2620 static int create_array(struct supertype
*st
)
2623 struct imsm_update_create_array
*u
;
2624 struct intel_super
*super
= st
->sb
;
2625 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
2626 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2627 struct disk_info
*inf
;
2628 struct imsm_disk
*disk
;
2632 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0) +
2633 sizeof(*inf
) * map
->num_members
;
2636 fprintf(stderr
, "%s: failed to allocate update buffer\n",
2641 u
->type
= update_create_array
;
2642 u
->dev_idx
= super
->current_vol
;
2643 imsm_copy_dev(&u
->dev
, dev
);
2644 inf
= get_disk_info(u
);
2645 for (i
= 0; i
< map
->num_members
; i
++) {
2646 idx
= get_imsm_disk_idx(dev
, i
);
2647 disk
= get_imsm_disk(super
, idx
);
2648 serialcpy(inf
[i
].serial
, disk
->serial
);
2650 append_metadata_update(st
, u
, len
);
2655 static int _add_disk(struct supertype
*st
)
2657 struct intel_super
*super
= st
->sb
;
2659 struct imsm_update_add_disk
*u
;
2667 fprintf(stderr
, "%s: failed to allocate update buffer\n",
2672 u
->type
= update_add_disk
;
2673 append_metadata_update(st
, u
, len
);
2678 static int write_init_super_imsm(struct supertype
*st
)
2680 if (st
->update_tail
) {
2681 /* queue the recently created array / added disk
2682 * as a metadata update */
2683 struct intel_super
*super
= st
->sb
;
2687 /* determine if we are creating a volume or adding a disk */
2688 if (super
->current_vol
< 0) {
2689 /* in the add disk case we are running in mdmon
2690 * context, so don't close fd's
2692 return _add_disk(st
);
2694 rv
= create_array(st
);
2696 for (d
= super
->disks
; d
; d
= d
->next
) {
2703 return write_super_imsm(st
->sb
, 1);
2707 static int store_zero_imsm(struct supertype
*st
, int fd
)
2709 unsigned long long dsize
;
2712 get_dev_size(fd
, NULL
, &dsize
);
2714 /* first block is stored on second to last sector of the disk */
2715 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2718 if (posix_memalign(&buf
, 512, 512) != 0)
2721 memset(buf
, 0, 512);
2722 if (write(fd
, buf
, 512) != 512)
2727 static int imsm_bbm_log_size(struct imsm_super
*mpb
)
2729 return __le32_to_cpu(mpb
->bbm_log_size
);
2733 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
2734 int layout
, int raiddisks
, int chunk
,
2735 unsigned long long size
, char *dev
,
2736 unsigned long long *freesize
,
2740 unsigned long long ldsize
;
2741 const struct imsm_orom
*orom
;
2743 if (level
!= LEVEL_CONTAINER
)
2748 if (check_env("IMSM_NO_PLATFORM"))
2751 orom
= find_imsm_orom();
2752 if (orom
&& raiddisks
> orom
->tds
) {
2754 fprintf(stderr
, Name
": %d exceeds maximum number of"
2755 " platform supported disks: %d\n",
2756 raiddisks
, orom
->tds
);
2760 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2763 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
2764 dev
, strerror(errno
));
2767 if (!get_dev_size(fd
, dev
, &ldsize
)) {
2773 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
2778 static unsigned long long find_size(struct extent
*e
, int *idx
, int num_extents
)
2780 const unsigned long long base_start
= e
[*idx
].start
;
2781 unsigned long long end
= base_start
+ e
[*idx
].size
;
2784 if (base_start
== end
)
2788 for (i
= *idx
; i
< num_extents
; i
++) {
2789 /* extend overlapping extents */
2790 if (e
[i
].start
>= base_start
&&
2791 e
[i
].start
<= end
) {
2794 if (e
[i
].start
+ e
[i
].size
> end
)
2795 end
= e
[i
].start
+ e
[i
].size
;
2796 } else if (e
[i
].start
> end
) {
2802 return end
- base_start
;
2805 static unsigned long long merge_extents(struct intel_super
*super
, int sum_extents
)
2807 /* build a composite disk with all known extents and generate a new
2808 * 'maxsize' given the "all disks in an array must share a common start
2809 * offset" constraint
2811 struct extent
*e
= calloc(sum_extents
, sizeof(*e
));
2815 unsigned long long pos
;
2816 unsigned long long start
;
2817 unsigned long long maxsize
;
2818 unsigned long reserve
;
2821 return ~0ULL; /* error */
2823 /* coalesce and sort all extents. also, check to see if we need to
2824 * reserve space between member arrays
2827 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2830 for (i
= 0; i
< dl
->extent_cnt
; i
++)
2833 qsort(e
, sum_extents
, sizeof(*e
), cmp_extent
);
2838 while (i
< sum_extents
) {
2839 e
[j
].start
= e
[i
].start
;
2840 e
[j
].size
= find_size(e
, &i
, sum_extents
);
2842 if (e
[j
-1].size
== 0)
2851 unsigned long long esize
;
2853 esize
= e
[i
].start
- pos
;
2854 if (esize
>= maxsize
) {
2859 pos
= e
[i
].start
+ e
[i
].size
;
2861 } while (e
[i
-1].size
);
2864 if (start_extent
> 0)
2865 reserve
= IMSM_RESERVED_SECTORS
; /* gap between raid regions */
2869 if (maxsize
< reserve
)
2872 super
->create_offset
= ~((__u32
) 0);
2873 if (start
+ reserve
> super
->create_offset
)
2874 return ~0ULL; /* start overflows create_offset */
2875 super
->create_offset
= start
+ reserve
;
2877 return maxsize
- reserve
;
2880 static int is_raid_level_supported(const struct imsm_orom
*orom
, int level
, int raiddisks
)
2882 if (level
< 0 || level
== 6 || level
== 4)
2885 /* if we have an orom prevent invalid raid levels */
2888 case 0: return imsm_orom_has_raid0(orom
);
2891 return imsm_orom_has_raid1e(orom
);
2892 return imsm_orom_has_raid1(orom
) && raiddisks
== 2;
2893 case 10: return imsm_orom_has_raid10(orom
) && raiddisks
== 4;
2894 case 5: return imsm_orom_has_raid5(orom
) && raiddisks
> 2;
2897 return 1; /* not on an Intel RAID platform so anything goes */
2902 #define pr_vrb(fmt, arg...) (void) (verbose && fprintf(stderr, Name fmt, ##arg))
2903 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
2904 * FIX ME add ahci details
2906 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
2907 int layout
, int raiddisks
, int chunk
,
2908 unsigned long long size
, char *dev
,
2909 unsigned long long *freesize
,
2913 struct intel_super
*super
= st
->sb
;
2914 struct imsm_super
*mpb
= super
->anchor
;
2916 unsigned long long pos
= 0;
2917 unsigned long long maxsize
;
2921 /* We must have the container info already read in. */
2925 if (!is_raid_level_supported(super
->orom
, level
, raiddisks
)) {
2926 pr_vrb(": platform does not support raid%d with %d disk%s\n",
2927 level
, raiddisks
, raiddisks
> 1 ? "s" : "");
2930 if (super
->orom
&& level
!= 1 &&
2931 !imsm_orom_has_chunk(super
->orom
, chunk
)) {
2932 pr_vrb(": platform does not support a chunk size of: %d\n", chunk
);
2935 if (layout
!= imsm_level_to_layout(level
)) {
2937 pr_vrb(": imsm raid 5 only supports the left-asymmetric layout\n");
2938 else if (level
== 10)
2939 pr_vrb(": imsm raid 10 only supports the n2 layout\n");
2941 pr_vrb(": imsm unknown layout %#x for this raid level %d\n",
2947 /* General test: make sure there is space for
2948 * 'raiddisks' device extents of size 'size' at a given
2951 unsigned long long minsize
= size
;
2952 unsigned long long start_offset
= ~0ULL;
2955 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
2956 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2961 e
= get_extents(super
, dl
);
2964 unsigned long long esize
;
2965 esize
= e
[i
].start
- pos
;
2966 if (esize
>= minsize
)
2968 if (found
&& start_offset
== ~0ULL) {
2971 } else if (found
&& pos
!= start_offset
) {
2975 pos
= e
[i
].start
+ e
[i
].size
;
2977 } while (e
[i
-1].size
);
2982 if (dcnt
< raiddisks
) {
2984 fprintf(stderr
, Name
": imsm: Not enough "
2985 "devices with space for this array "
2993 /* This device must be a member of the set */
2994 if (stat(dev
, &stb
) < 0)
2996 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
2998 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2999 if (dl
->major
== major(stb
.st_rdev
) &&
3000 dl
->minor
== minor(stb
.st_rdev
))
3005 fprintf(stderr
, Name
": %s is not in the "
3006 "same imsm set\n", dev
);
3008 } else if (super
->orom
&& dl
->index
< 0 && mpb
->num_raid_devs
) {
3009 /* If a volume is present then the current creation attempt
3010 * cannot incorporate new spares because the orom may not
3011 * understand this configuration (all member disks must be
3012 * members of each array in the container).
3014 fprintf(stderr
, Name
": %s is a spare and a volume"
3015 " is already defined for this container\n", dev
);
3016 fprintf(stderr
, Name
": The option-rom requires all member"
3017 " disks to be a member of all volumes\n");
3021 /* retrieve the largest free space block */
3022 e
= get_extents(super
, dl
);
3027 unsigned long long esize
;
3029 esize
= e
[i
].start
- pos
;
3030 if (esize
>= maxsize
)
3032 pos
= e
[i
].start
+ e
[i
].size
;
3034 } while (e
[i
-1].size
);
3039 fprintf(stderr
, Name
": unable to determine free space for: %s\n",
3043 if (maxsize
< size
) {
3045 fprintf(stderr
, Name
": %s not enough space (%llu < %llu)\n",
3046 dev
, maxsize
, size
);
3050 /* count total number of extents for merge */
3052 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3054 i
+= dl
->extent_cnt
;
3056 maxsize
= merge_extents(super
, i
);
3057 if (maxsize
< size
) {
3059 fprintf(stderr
, Name
": not enough space after merge (%llu < %llu)\n",
3062 } else if (maxsize
== ~0ULL) {
3064 fprintf(stderr
, Name
": failed to merge %d extents\n", i
);
3068 *freesize
= maxsize
;
3073 static int reserve_space(struct supertype
*st
, int raiddisks
,
3074 unsigned long long size
, int chunk
,
3075 unsigned long long *freesize
)
3077 struct intel_super
*super
= st
->sb
;
3078 struct imsm_super
*mpb
= super
->anchor
;
3083 unsigned long long maxsize
;
3084 unsigned long long minsize
;
3088 /* find the largest common start free region of the possible disks */
3092 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
3098 /* don't activate new spares if we are orom constrained
3099 * and there is already a volume active in the container
3101 if (super
->orom
&& dl
->index
< 0 && mpb
->num_raid_devs
)
3104 e
= get_extents(super
, dl
);
3107 for (i
= 1; e
[i
-1].size
; i
++)
3115 maxsize
= merge_extents(super
, extent_cnt
);
3120 if (cnt
< raiddisks
||
3121 (super
->orom
&& used
&& used
!= raiddisks
) ||
3122 maxsize
< minsize
) {
3123 fprintf(stderr
, Name
": not enough devices with space to create array.\n");
3124 return 0; /* No enough free spaces large enough */
3136 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3138 dl
->raiddisk
= cnt
++;
3145 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
3146 int raiddisks
, int chunk
, unsigned long long size
,
3147 char *dev
, unsigned long long *freesize
,
3153 /* if given unused devices create a container
3154 * if given given devices in a container create a member volume
3156 if (level
== LEVEL_CONTAINER
) {
3157 /* Must be a fresh device to add to a container */
3158 return validate_geometry_imsm_container(st
, level
, layout
,
3159 raiddisks
, chunk
, size
,
3165 if (st
->sb
&& freesize
) {
3166 /* we are being asked to automatically layout a
3167 * new volume based on the current contents of
3168 * the container. If the the parameters can be
3169 * satisfied reserve_space will record the disks,
3170 * start offset, and size of the volume to be
3171 * created. add_to_super and getinfo_super
3172 * detect when autolayout is in progress.
3174 return reserve_space(st
, raiddisks
, size
, chunk
, freesize
);
3179 /* creating in a given container */
3180 return validate_geometry_imsm_volume(st
, level
, layout
,
3181 raiddisks
, chunk
, size
,
3182 dev
, freesize
, verbose
);
3185 /* limit creation to the following levels */
3197 /* This device needs to be a device in an 'imsm' container */
3198 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
3202 Name
": Cannot create this array on device %s\n",
3207 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
3209 fprintf(stderr
, Name
": Cannot open %s: %s\n",
3210 dev
, strerror(errno
));
3213 /* Well, it is in use by someone, maybe an 'imsm' container. */
3214 cfd
= open_container(fd
);
3218 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
3222 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
3224 if (sra
&& sra
->array
.major_version
== -1 &&
3225 strcmp(sra
->text_version
, "imsm") == 0) {
3226 /* This is a member of a imsm container. Load the container
3227 * and try to create a volume
3229 struct intel_super
*super
;
3231 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
3233 st
->container_dev
= fd2devnum(cfd
);
3235 return validate_geometry_imsm_volume(st
, level
, layout
,
3241 } else /* may belong to another container */
3246 #endif /* MDASSEMBLE */
3248 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
3250 /* Given a container loaded by load_super_imsm_all,
3251 * extract information about all the arrays into
3254 * For each imsm_dev create an mdinfo, fill it in,
3255 * then look for matching devices in super->disks
3256 * and create appropriate device mdinfo.
3258 struct intel_super
*super
= st
->sb
;
3259 struct imsm_super
*mpb
= super
->anchor
;
3260 struct mdinfo
*rest
= NULL
;
3263 /* do not assemble arrays that might have bad blocks */
3264 if (imsm_bbm_log_size(super
->anchor
)) {
3265 fprintf(stderr
, Name
": BBM log found in metadata. "
3266 "Cannot activate array(s).\n");
3270 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3271 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
3272 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3273 struct mdinfo
*this;
3276 this = malloc(sizeof(*this));
3277 memset(this, 0, sizeof(*this));
3280 super
->current_vol
= i
;
3281 getinfo_super_imsm_volume(st
, this);
3282 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
3283 struct mdinfo
*info_d
;
3291 idx
= get_imsm_disk_idx(dev
, slot
);
3292 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
3293 for (d
= super
->disks
; d
; d
= d
->next
)
3294 if (d
->index
== idx
)
3300 s
= d
? d
->disk
.status
: 0;
3301 if (s
& FAILED_DISK
)
3303 if (!(s
& USABLE_DISK
))
3305 if (ord
& IMSM_ORD_REBUILD
)
3309 * if we skip some disks the array will be assmebled degraded;
3310 * reset resync start to avoid a dirty-degraded situation
3312 * FIXME handle dirty degraded
3314 if (skip
&& !dev
->vol
.dirty
)
3315 this->resync_start
= ~0ULL;
3319 info_d
= malloc(sizeof(*info_d
));
3321 fprintf(stderr
, Name
": failed to allocate disk"
3322 " for volume %s\n", (char *) dev
->volume
);
3327 memset(info_d
, 0, sizeof(*info_d
));
3328 info_d
->next
= this->devs
;
3329 this->devs
= info_d
;
3331 info_d
->disk
.number
= d
->index
;
3332 info_d
->disk
.major
= d
->major
;
3333 info_d
->disk
.minor
= d
->minor
;
3334 info_d
->disk
.raid_disk
= slot
;
3336 this->array
.working_disks
++;
3338 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
3339 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
3340 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
3342 strcpy(info_d
->name
, d
->devname
);
3352 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
3355 struct intel_super
*super
= c
->sb
;
3356 struct imsm_super
*mpb
= super
->anchor
;
3358 if (atoi(inst
) >= mpb
->num_raid_devs
) {
3359 fprintf(stderr
, "%s: subarry index %d, out of range\n",
3360 __func__
, atoi(inst
));
3364 dprintf("imsm: open_new %s\n", inst
);
3365 a
->info
.container_member
= atoi(inst
);
3369 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
, int failed
)
3371 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3374 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
3375 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
3377 switch (get_imsm_raid_level(map
)) {
3379 return IMSM_T_STATE_FAILED
;
3382 if (failed
< map
->num_members
)
3383 return IMSM_T_STATE_DEGRADED
;
3385 return IMSM_T_STATE_FAILED
;
3390 * check to see if any mirrors have failed, otherwise we
3391 * are degraded. Even numbered slots are mirrored on
3395 /* gcc -Os complains that this is unused */
3396 int insync
= insync
;
3398 for (i
= 0; i
< map
->num_members
; i
++) {
3399 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
3400 int idx
= ord_to_idx(ord
);
3401 struct imsm_disk
*disk
;
3403 /* reset the potential in-sync count on even-numbered
3404 * slots. num_copies is always 2 for imsm raid10
3409 disk
= get_imsm_disk(super
, idx
);
3410 if (!disk
|| disk
->status
& FAILED_DISK
||
3411 ord
& IMSM_ORD_REBUILD
)
3414 /* no in-sync disks left in this mirror the
3418 return IMSM_T_STATE_FAILED
;
3421 return IMSM_T_STATE_DEGRADED
;
3425 return IMSM_T_STATE_DEGRADED
;
3427 return IMSM_T_STATE_FAILED
;
3433 return map
->map_state
;
3436 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
)
3440 struct imsm_disk
*disk
;
3441 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3442 struct imsm_map
*prev
= get_imsm_map(dev
, dev
->vol
.migr_state
);
3446 /* at the beginning of migration we set IMSM_ORD_REBUILD on
3447 * disks that are being rebuilt. New failures are recorded to
3448 * map[0]. So we look through all the disks we started with and
3449 * see if any failures are still present, or if any new ones
3452 * FIXME add support for online capacity expansion and
3453 * raid-level-migration
3455 for (i
= 0; i
< prev
->num_members
; i
++) {
3456 ord
= __le32_to_cpu(prev
->disk_ord_tbl
[i
]);
3457 ord
|= __le32_to_cpu(map
->disk_ord_tbl
[i
]);
3458 idx
= ord_to_idx(ord
);
3460 disk
= get_imsm_disk(super
, idx
);
3461 if (!disk
|| disk
->status
& FAILED_DISK
||
3462 ord
& IMSM_ORD_REBUILD
)
3469 static int is_resyncing(struct imsm_dev
*dev
)
3471 struct imsm_map
*migr_map
;
3473 if (!dev
->vol
.migr_state
)
3476 if (dev
->vol
.migr_type
== MIGR_INIT
)
3479 migr_map
= get_imsm_map(dev
, 1);
3481 if (migr_map
->map_state
== IMSM_T_STATE_NORMAL
)
3487 static int is_rebuilding(struct imsm_dev
*dev
)
3489 struct imsm_map
*migr_map
;
3491 if (!dev
->vol
.migr_state
)
3494 if (dev
->vol
.migr_type
!= MIGR_REBUILD
)
3497 migr_map
= get_imsm_map(dev
, 1);
3499 if (migr_map
->map_state
== IMSM_T_STATE_DEGRADED
)
3505 /* return true if we recorded new information */
3506 static int mark_failure(struct imsm_dev
*dev
, struct imsm_disk
*disk
, int idx
)
3510 struct imsm_map
*map
;
3512 /* new failures are always set in map[0] */
3513 map
= get_imsm_map(dev
, 0);
3515 slot
= get_imsm_disk_slot(map
, idx
);
3519 ord
= __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
3520 if ((disk
->status
& FAILED_DISK
) && (ord
& IMSM_ORD_REBUILD
))
3523 disk
->status
|= FAILED_DISK
;
3524 set_imsm_ord_tbl_ent(map
, slot
, idx
| IMSM_ORD_REBUILD
);
3525 if (map
->failed_disk_num
== ~0)
3526 map
->failed_disk_num
= slot
;
3530 static void mark_missing(struct imsm_dev
*dev
, struct imsm_disk
*disk
, int idx
)
3532 mark_failure(dev
, disk
, idx
);
3534 if (disk
->scsi_id
== __cpu_to_le32(~(__u32
)0))
3537 disk
->scsi_id
= __cpu_to_le32(~(__u32
)0);
3538 memmove(&disk
->serial
[0], &disk
->serial
[1], MAX_RAID_SERIAL_LEN
- 1);
3541 /* Handle dirty -> clean transititions and resync. Degraded and rebuild
3542 * states are handled in imsm_set_disk() with one exception, when a
3543 * resync is stopped due to a new failure this routine will set the
3544 * 'degraded' state for the array.
3546 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
3548 int inst
= a
->info
.container_member
;
3549 struct intel_super
*super
= a
->container
->sb
;
3550 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
3551 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3552 int failed
= imsm_count_failed(super
, dev
);
3553 __u8 map_state
= imsm_check_degraded(super
, dev
, failed
);
3555 /* before we activate this array handle any missing disks */
3556 if (consistent
== 2 && super
->missing
) {
3559 dprintf("imsm: mark missing\n");
3560 end_migration(dev
, map_state
);
3561 for (dl
= super
->missing
; dl
; dl
= dl
->next
)
3562 mark_missing(dev
, &dl
->disk
, dl
->index
);
3563 super
->updates_pending
++;
3566 if (consistent
== 2 &&
3567 (!is_resync_complete(a
) ||
3568 map_state
!= IMSM_T_STATE_NORMAL
||
3569 dev
->vol
.migr_state
))
3572 if (is_resync_complete(a
)) {
3573 /* complete intialization / resync,
3574 * recovery and interrupted recovery is completed in
3577 if (is_resyncing(dev
)) {
3578 dprintf("imsm: mark resync done\n");
3579 end_migration(dev
, map_state
);
3580 super
->updates_pending
++;
3582 } else if (!is_resyncing(dev
) && !failed
) {
3583 /* mark the start of the init process if nothing is failed */
3584 dprintf("imsm: mark resync start (%llu)\n", a
->resync_start
);
3585 if (map
->map_state
== IMSM_T_STATE_NORMAL
)
3586 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_REBUILD
);
3588 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_INIT
);
3589 super
->updates_pending
++;
3592 /* check if we can update the migration checkpoint */
3593 if (dev
->vol
.migr_state
&&
3594 __le32_to_cpu(dev
->vol
.curr_migr_unit
) != a
->resync_start
) {
3595 dprintf("imsm: checkpoint migration (%llu)\n", a
->resync_start
);
3596 dev
->vol
.curr_migr_unit
= __cpu_to_le32(a
->resync_start
);
3597 super
->updates_pending
++;
3600 /* mark dirty / clean */
3601 if (dev
->vol
.dirty
!= !consistent
) {
3602 dprintf("imsm: mark '%s' (%llu)\n",
3603 consistent
? "clean" : "dirty", a
->resync_start
);
3608 super
->updates_pending
++;
3613 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
3615 int inst
= a
->info
.container_member
;
3616 struct intel_super
*super
= a
->container
->sb
;
3617 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
3618 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3619 struct imsm_disk
*disk
;
3624 if (n
> map
->num_members
)
3625 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
3626 n
, map
->num_members
- 1);
3631 dprintf("imsm: set_disk %d:%x\n", n
, state
);
3633 ord
= get_imsm_ord_tbl_ent(dev
, n
);
3634 disk
= get_imsm_disk(super
, ord_to_idx(ord
));
3636 /* check for new failures */
3637 if (state
& DS_FAULTY
) {
3638 if (mark_failure(dev
, disk
, ord_to_idx(ord
)))
3639 super
->updates_pending
++;
3642 /* check if in_sync */
3643 if (state
& DS_INSYNC
&& ord
& IMSM_ORD_REBUILD
&& is_rebuilding(dev
)) {
3644 struct imsm_map
*migr_map
= get_imsm_map(dev
, 1);
3646 set_imsm_ord_tbl_ent(migr_map
, n
, ord_to_idx(ord
));
3647 super
->updates_pending
++;
3650 failed
= imsm_count_failed(super
, dev
);
3651 map_state
= imsm_check_degraded(super
, dev
, failed
);
3653 /* check if recovery complete, newly degraded, or failed */
3654 if (map_state
== IMSM_T_STATE_NORMAL
&& is_rebuilding(dev
)) {
3655 end_migration(dev
, map_state
);
3656 map
= get_imsm_map(dev
, 0);
3657 map
->failed_disk_num
= ~0;
3658 super
->updates_pending
++;
3659 } else if (map_state
== IMSM_T_STATE_DEGRADED
&&
3660 map
->map_state
!= map_state
&&
3661 !dev
->vol
.migr_state
) {
3662 dprintf("imsm: mark degraded\n");
3663 map
->map_state
= map_state
;
3664 super
->updates_pending
++;
3665 } else if (map_state
== IMSM_T_STATE_FAILED
&&
3666 map
->map_state
!= map_state
) {
3667 dprintf("imsm: mark failed\n");
3668 end_migration(dev
, map_state
);
3669 super
->updates_pending
++;
3673 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
3675 struct imsm_super
*mpb
= super
->anchor
;
3676 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
3677 unsigned long long dsize
;
3678 unsigned long long sectors
;
3680 get_dev_size(fd
, NULL
, &dsize
);
3682 if (mpb_size
> 512) {
3683 /* -1 to account for anchor */
3684 sectors
= mpb_sectors(mpb
) - 1;
3686 /* write the extended mpb to the sectors preceeding the anchor */
3687 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
3690 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
3694 /* first block is stored on second to last sector of the disk */
3695 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
3698 if (write(fd
, super
->buf
, 512) != 512)
3704 static void imsm_sync_metadata(struct supertype
*container
)
3706 struct intel_super
*super
= container
->sb
;
3708 if (!super
->updates_pending
)
3711 write_super_imsm(super
, 0);
3713 super
->updates_pending
= 0;
3716 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
3718 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
3719 int i
= get_imsm_disk_idx(dev
, idx
);
3722 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3726 if (dl
&& dl
->disk
.status
& FAILED_DISK
)
3730 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
3735 static struct dl
*imsm_add_spare(struct intel_super
*super
, int slot
,
3736 struct active_array
*a
, int activate_new
)
3738 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
3739 int idx
= get_imsm_disk_idx(dev
, slot
);
3740 struct imsm_super
*mpb
= super
->anchor
;
3741 struct imsm_map
*map
;
3742 unsigned long long esize
;
3743 unsigned long long pos
;
3752 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
3753 /* If in this array, skip */
3754 for (d
= a
->info
.devs
; d
; d
= d
->next
)
3755 if (d
->state_fd
>= 0 &&
3756 d
->disk
.major
== dl
->major
&&
3757 d
->disk
.minor
== dl
->minor
) {
3758 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
3764 /* skip in use or failed drives */
3765 if (dl
->disk
.status
& FAILED_DISK
|| idx
== dl
->index
||
3767 dprintf("%x:%x status (failed: %d index: %d)\n",
3768 dl
->major
, dl
->minor
,
3769 (dl
->disk
.status
& FAILED_DISK
) == FAILED_DISK
, idx
);
3773 /* skip pure spares when we are looking for partially
3774 * assimilated drives
3776 if (dl
->index
== -1 && !activate_new
)
3779 /* Does this unused device have the requisite free space?
3780 * It needs to be able to cover all member volumes
3782 ex
= get_extents(super
, dl
);
3784 dprintf("cannot get extents\n");
3787 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3788 dev
= get_imsm_dev(super
, i
);
3789 map
= get_imsm_map(dev
, 0);
3791 /* check if this disk is already a member of
3794 if (get_imsm_disk_slot(map
, dl
->index
) >= 0)
3800 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
3801 blocks
= __le32_to_cpu(map
->blocks_per_member
);
3804 /* check that we can start at pba_of_lba0 with
3805 * blocks_per_member of space
3807 esize
= ex
[j
].start
- pos
;
3808 if (array_start
>= pos
&&
3809 array_start
+ blocks
< ex
[j
].start
) {
3813 pos
= ex
[j
].start
+ ex
[j
].size
;
3815 } while (ex
[j
-1].size
);
3822 if (i
< mpb
->num_raid_devs
) {
3823 dprintf("%x:%x does not have %u at %u\n",
3824 dl
->major
, dl
->minor
,
3825 blocks
, array_start
);
3835 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
3836 struct metadata_update
**updates
)
3839 * Find a device with unused free space and use it to replace a
3840 * failed/vacant region in an array. We replace failed regions one a
3841 * array at a time. The result is that a new spare disk will be added
3842 * to the first failed array and after the monitor has finished
3843 * propagating failures the remainder will be consumed.
3845 * FIXME add a capability for mdmon to request spares from another
3849 struct intel_super
*super
= a
->container
->sb
;
3850 int inst
= a
->info
.container_member
;
3851 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
3852 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3853 int failed
= a
->info
.array
.raid_disks
;
3854 struct mdinfo
*rv
= NULL
;
3857 struct metadata_update
*mu
;
3859 struct imsm_update_activate_spare
*u
;
3863 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
3864 if ((d
->curr_state
& DS_FAULTY
) &&
3866 /* wait for Removal to happen */
3868 if (d
->state_fd
>= 0)
3872 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
3873 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
3874 if (imsm_check_degraded(super
, dev
, failed
) != IMSM_T_STATE_DEGRADED
)
3877 /* For each slot, if it is not working, find a spare */
3878 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
3879 for (d
= a
->info
.devs
; d
; d
= d
->next
)
3880 if (d
->disk
.raid_disk
== i
)
3882 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
3883 if (d
&& (d
->state_fd
>= 0))
3887 * OK, this device needs recovery. Try to re-add the
3888 * previous occupant of this slot, if this fails see if
3889 * we can continue the assimilation of a spare that was
3890 * partially assimilated, finally try to activate a new
3893 dl
= imsm_readd(super
, i
, a
);
3895 dl
= imsm_add_spare(super
, i
, a
, 0);
3897 dl
= imsm_add_spare(super
, i
, a
, 1);
3901 /* found a usable disk with enough space */
3902 di
= malloc(sizeof(*di
));
3905 memset(di
, 0, sizeof(*di
));
3907 /* dl->index will be -1 in the case we are activating a
3908 * pristine spare. imsm_process_update() will create a
3909 * new index in this case. Once a disk is found to be
3910 * failed in all member arrays it is kicked from the
3913 di
->disk
.number
= dl
->index
;
3915 /* (ab)use di->devs to store a pointer to the device
3918 di
->devs
= (struct mdinfo
*) dl
;
3920 di
->disk
.raid_disk
= i
;
3921 di
->disk
.major
= dl
->major
;
3922 di
->disk
.minor
= dl
->minor
;
3924 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
3925 di
->component_size
= a
->info
.component_size
;
3926 di
->container_member
= inst
;
3930 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
3931 i
, di
->data_offset
);
3937 /* No spares found */
3939 /* Now 'rv' has a list of devices to return.
3940 * Create a metadata_update record to update the
3941 * disk_ord_tbl for the array
3943 mu
= malloc(sizeof(*mu
));
3945 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
3946 if (mu
->buf
== NULL
) {
3953 struct mdinfo
*n
= rv
->next
;
3962 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
3963 mu
->next
= *updates
;
3964 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
3966 for (di
= rv
; di
; di
= di
->next
) {
3967 u
->type
= update_activate_spare
;
3968 u
->dl
= (struct dl
*) di
->devs
;
3970 u
->slot
= di
->disk
.raid_disk
;
3981 static int disks_overlap(struct intel_super
*super
, int idx
, struct imsm_update_create_array
*u
)
3983 struct imsm_dev
*dev
= get_imsm_dev(super
, idx
);
3984 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3985 struct imsm_map
*new_map
= get_imsm_map(&u
->dev
, 0);
3986 struct disk_info
*inf
= get_disk_info(u
);
3987 struct imsm_disk
*disk
;
3991 for (i
= 0; i
< map
->num_members
; i
++) {
3992 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
3993 for (j
= 0; j
< new_map
->num_members
; j
++)
3994 if (serialcmp(disk
->serial
, inf
[j
].serial
) == 0)
4001 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
);
4003 static void imsm_process_update(struct supertype
*st
,
4004 struct metadata_update
*update
)
4007 * crack open the metadata_update envelope to find the update record
4008 * update can be one of:
4009 * update_activate_spare - a spare device has replaced a failed
4010 * device in an array, update the disk_ord_tbl. If this disk is
4011 * present in all member arrays then also clear the SPARE_DISK
4014 struct intel_super
*super
= st
->sb
;
4015 struct imsm_super
*mpb
;
4016 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
4018 /* update requires a larger buf but the allocation failed */
4019 if (super
->next_len
&& !super
->next_buf
) {
4020 super
->next_len
= 0;
4024 if (super
->next_buf
) {
4025 memcpy(super
->next_buf
, super
->buf
, super
->len
);
4027 super
->len
= super
->next_len
;
4028 super
->buf
= super
->next_buf
;
4030 super
->next_len
= 0;
4031 super
->next_buf
= NULL
;
4034 mpb
= super
->anchor
;
4037 case update_activate_spare
: {
4038 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
4039 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
4040 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4041 struct imsm_map
*migr_map
;
4042 struct active_array
*a
;
4043 struct imsm_disk
*disk
;
4048 int victim
= get_imsm_disk_idx(dev
, u
->slot
);
4051 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
4056 fprintf(stderr
, "error: imsm_activate_spare passed "
4057 "an unknown disk (index: %d)\n",
4062 super
->updates_pending
++;
4064 /* count failures (excluding rebuilds and the victim)
4065 * to determine map[0] state
4068 for (i
= 0; i
< map
->num_members
; i
++) {
4071 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
4072 if (!disk
|| disk
->status
& FAILED_DISK
)
4076 /* adding a pristine spare, assign a new index */
4077 if (dl
->index
< 0) {
4078 dl
->index
= super
->anchor
->num_disks
;
4079 super
->anchor
->num_disks
++;
4082 disk
->status
|= CONFIGURED_DISK
;
4083 disk
->status
&= ~SPARE_DISK
;
4086 to_state
= imsm_check_degraded(super
, dev
, failed
);
4087 map
->map_state
= IMSM_T_STATE_DEGRADED
;
4088 migrate(dev
, to_state
, MIGR_REBUILD
);
4089 migr_map
= get_imsm_map(dev
, 1);
4090 set_imsm_ord_tbl_ent(map
, u
->slot
, dl
->index
);
4091 set_imsm_ord_tbl_ent(migr_map
, u
->slot
, dl
->index
| IMSM_ORD_REBUILD
);
4093 /* count arrays using the victim in the metadata */
4095 for (a
= st
->arrays
; a
; a
= a
->next
) {
4096 dev
= get_imsm_dev(super
, a
->info
.container_member
);
4097 map
= get_imsm_map(dev
, 0);
4099 if (get_imsm_disk_slot(map
, victim
) >= 0)
4103 /* delete the victim if it is no longer being
4109 /* We know that 'manager' isn't touching anything,
4110 * so it is safe to delete
4112 for (dlp
= &super
->disks
; *dlp
; dlp
= &(*dlp
)->next
)
4113 if ((*dlp
)->index
== victim
)
4116 /* victim may be on the missing list */
4118 for (dlp
= &super
->missing
; *dlp
; dlp
= &(*dlp
)->next
)
4119 if ((*dlp
)->index
== victim
)
4121 imsm_delete(super
, dlp
, victim
);
4125 case update_create_array
: {
4126 /* someone wants to create a new array, we need to be aware of
4127 * a few races/collisions:
4128 * 1/ 'Create' called by two separate instances of mdadm
4129 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
4130 * devices that have since been assimilated via
4132 * In the event this update can not be carried out mdadm will
4133 * (FIX ME) notice that its update did not take hold.
4135 struct imsm_update_create_array
*u
= (void *) update
->buf
;
4136 struct intel_dev
*dv
;
4137 struct imsm_dev
*dev
;
4138 struct imsm_map
*map
, *new_map
;
4139 unsigned long long start
, end
;
4140 unsigned long long new_start
, new_end
;
4142 struct disk_info
*inf
;
4145 /* handle racing creates: first come first serve */
4146 if (u
->dev_idx
< mpb
->num_raid_devs
) {
4147 dprintf("%s: subarray %d already defined\n",
4148 __func__
, u
->dev_idx
);
4152 /* check update is next in sequence */
4153 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
4154 dprintf("%s: can not create array %d expected index %d\n",
4155 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
4159 new_map
= get_imsm_map(&u
->dev
, 0);
4160 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
4161 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
4162 inf
= get_disk_info(u
);
4164 /* handle activate_spare versus create race:
4165 * check to make sure that overlapping arrays do not include
4168 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4169 dev
= get_imsm_dev(super
, i
);
4170 map
= get_imsm_map(dev
, 0);
4171 start
= __le32_to_cpu(map
->pba_of_lba0
);
4172 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
4173 if ((new_start
>= start
&& new_start
<= end
) ||
4174 (start
>= new_start
&& start
<= new_end
))
4179 if (disks_overlap(super
, i
, u
)) {
4180 dprintf("%s: arrays overlap\n", __func__
);
4185 /* check that prepare update was successful */
4186 if (!update
->space
) {
4187 dprintf("%s: prepare update failed\n", __func__
);
4191 /* check that all disks are still active before committing
4192 * changes. FIXME: could we instead handle this by creating a
4193 * degraded array? That's probably not what the user expects,
4194 * so better to drop this update on the floor.
4196 for (i
= 0; i
< new_map
->num_members
; i
++) {
4197 dl
= serial_to_dl(inf
[i
].serial
, super
);
4199 dprintf("%s: disk disappeared\n", __func__
);
4204 super
->updates_pending
++;
4206 /* convert spares to members and fixup ord_tbl */
4207 for (i
= 0; i
< new_map
->num_members
; i
++) {
4208 dl
= serial_to_dl(inf
[i
].serial
, super
);
4209 if (dl
->index
== -1) {
4210 dl
->index
= mpb
->num_disks
;
4212 dl
->disk
.status
|= CONFIGURED_DISK
;
4213 dl
->disk
.status
&= ~SPARE_DISK
;
4215 set_imsm_ord_tbl_ent(new_map
, i
, dl
->index
);
4220 update
->space
= NULL
;
4221 imsm_copy_dev(dev
, &u
->dev
);
4222 dv
->index
= u
->dev_idx
;
4223 dv
->next
= super
->devlist
;
4224 super
->devlist
= dv
;
4225 mpb
->num_raid_devs
++;
4227 imsm_update_version_info(super
);
4230 /* mdmon knows how to release update->space, but not
4231 * ((struct intel_dev *) update->space)->dev
4233 if (update
->space
) {
4239 case update_add_disk
:
4241 /* we may be able to repair some arrays if disks are
4244 struct active_array
*a
;
4246 super
->updates_pending
++;
4247 for (a
= st
->arrays
; a
; a
= a
->next
)
4248 a
->check_degraded
= 1;
4250 /* add some spares to the metadata */
4251 while (super
->add
) {
4255 super
->add
= al
->next
;
4256 al
->next
= super
->disks
;
4258 dprintf("%s: added %x:%x\n",
4259 __func__
, al
->major
, al
->minor
);
4266 static void imsm_prepare_update(struct supertype
*st
,
4267 struct metadata_update
*update
)
4270 * Allocate space to hold new disk entries, raid-device entries or a new
4271 * mpb if necessary. The manager synchronously waits for updates to
4272 * complete in the monitor, so new mpb buffers allocated here can be
4273 * integrated by the monitor thread without worrying about live pointers
4274 * in the manager thread.
4276 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
4277 struct intel_super
*super
= st
->sb
;
4278 struct imsm_super
*mpb
= super
->anchor
;
4283 case update_create_array
: {
4284 struct imsm_update_create_array
*u
= (void *) update
->buf
;
4285 struct intel_dev
*dv
;
4286 struct imsm_dev
*dev
= &u
->dev
;
4287 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4289 struct disk_info
*inf
;
4293 inf
= get_disk_info(u
);
4294 len
= sizeof_imsm_dev(dev
, 1);
4295 /* allocate a new super->devlist entry */
4296 dv
= malloc(sizeof(*dv
));
4298 dv
->dev
= malloc(len
);
4303 update
->space
= NULL
;
4307 /* count how many spares will be converted to members */
4308 for (i
= 0; i
< map
->num_members
; i
++) {
4309 dl
= serial_to_dl(inf
[i
].serial
, super
);
4311 /* hmm maybe it failed?, nothing we can do about
4316 if (count_memberships(dl
, super
) == 0)
4319 len
+= activate
* sizeof(struct imsm_disk
);
4326 /* check if we need a larger metadata buffer */
4327 if (super
->next_buf
)
4328 buf_len
= super
->next_len
;
4330 buf_len
= super
->len
;
4332 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
4333 /* ok we need a larger buf than what is currently allocated
4334 * if this allocation fails process_update will notice that
4335 * ->next_len is set and ->next_buf is NULL
4337 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
4338 if (super
->next_buf
)
4339 free(super
->next_buf
);
4341 super
->next_len
= buf_len
;
4342 if (posix_memalign(&super
->next_buf
, 512, buf_len
) != 0)
4343 super
->next_buf
= NULL
;
4347 /* must be called while manager is quiesced */
4348 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
)
4350 struct imsm_super
*mpb
= super
->anchor
;
4352 struct imsm_dev
*dev
;
4353 struct imsm_map
*map
;
4354 int i
, j
, num_members
;
4357 dprintf("%s: deleting device[%d] from imsm_super\n",
4360 /* shift all indexes down one */
4361 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
4362 if (iter
->index
> index
)
4364 for (iter
= super
->missing
; iter
; iter
= iter
->next
)
4365 if (iter
->index
> index
)
4368 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4369 dev
= get_imsm_dev(super
, i
);
4370 map
= get_imsm_map(dev
, 0);
4371 num_members
= map
->num_members
;
4372 for (j
= 0; j
< num_members
; j
++) {
4373 /* update ord entries being careful not to propagate
4374 * ord-flags to the first map
4376 ord
= get_imsm_ord_tbl_ent(dev
, j
);
4378 if (ord_to_idx(ord
) <= index
)
4381 map
= get_imsm_map(dev
, 0);
4382 set_imsm_ord_tbl_ent(map
, j
, ord_to_idx(ord
- 1));
4383 map
= get_imsm_map(dev
, 1);
4385 set_imsm_ord_tbl_ent(map
, j
, ord
- 1);
4390 super
->updates_pending
++;
4392 struct dl
*dl
= *dlp
;
4394 *dlp
= (*dlp
)->next
;
4395 __free_imsm_disk(dl
);
4398 #endif /* MDASSEMBLE */
4400 struct superswitch super_imsm
= {
4402 .examine_super
= examine_super_imsm
,
4403 .brief_examine_super
= brief_examine_super_imsm
,
4404 .detail_super
= detail_super_imsm
,
4405 .brief_detail_super
= brief_detail_super_imsm
,
4406 .write_init_super
= write_init_super_imsm
,
4407 .validate_geometry
= validate_geometry_imsm
,
4408 .add_to_super
= add_to_super_imsm
,
4409 .detail_platform
= detail_platform_imsm
,
4411 .match_home
= match_home_imsm
,
4412 .uuid_from_super
= uuid_from_super_imsm
,
4413 .getinfo_super
= getinfo_super_imsm
,
4414 .update_super
= update_super_imsm
,
4416 .avail_size
= avail_size_imsm
,
4418 .compare_super
= compare_super_imsm
,
4420 .load_super
= load_super_imsm
,
4421 .init_super
= init_super_imsm
,
4422 .store_super
= store_zero_imsm
,
4423 .free_super
= free_super_imsm
,
4424 .match_metadata_desc
= match_metadata_desc_imsm
,
4425 .container_content
= container_content_imsm
,
4426 .default_layout
= imsm_level_to_layout
,
4433 .open_new
= imsm_open_new
,
4434 .load_super
= load_super_imsm
,
4435 .set_array_state
= imsm_set_array_state
,
4436 .set_disk
= imsm_set_disk
,
4437 .sync_metadata
= imsm_sync_metadata
,
4438 .activate_spare
= imsm_activate_spare
,
4439 .process_update
= imsm_process_update
,
4440 .prepare_update
= imsm_prepare_update
,
4441 #endif /* MDASSEMBLE */