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
28 /* MPB == Metadata Parameter Block */
29 #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
30 #define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
31 #define MPB_VERSION_RAID0 "1.0.00"
32 #define MPB_VERSION_RAID1 "1.1.00"
33 #define MPB_VERSION_MANY_VOLUMES_PER_ARRAY "1.2.00"
34 #define MPB_VERSION_3OR4_DISK_ARRAY "1.2.01"
35 #define MPB_VERSION_RAID5 "1.2.02"
36 #define MPB_VERSION_5OR6_DISK_ARRAY "1.2.04"
37 #define MPB_VERSION_CNG "1.2.06"
38 #define MPB_VERSION_ATTRIBS "1.3.00"
39 #define MAX_SIGNATURE_LENGTH 32
40 #define MAX_RAID_SERIAL_LEN 16
42 #define MPB_ATTRIB_CHECKSUM_VERIFY __cpu_to_le32(0x80000000)
43 #define MPB_ATTRIB_PM __cpu_to_le32(0x40000000)
44 #define MPB_ATTRIB_2TB __cpu_to_le32(0x20000000)
45 #define MPB_ATTRIB_RAID0 __cpu_to_le32(0x00000001)
46 #define MPB_ATTRIB_RAID1 __cpu_to_le32(0x00000002)
47 #define MPB_ATTRIB_RAID10 __cpu_to_le32(0x00000004)
48 #define MPB_ATTRIB_RAID1E __cpu_to_le32(0x00000008)
49 #define MPB_ATTRIB_RAID5 __cpu_to_le32(0x00000010)
50 #define MPB_ATTRIB_RAIDCNG __cpu_to_le32(0x00000020)
52 #define MPB_SECTOR_CNT 418
53 #define IMSM_RESERVED_SECTORS 4096
55 /* Disk configuration info. */
56 #define IMSM_MAX_DEVICES 255
58 __u8 serial
[MAX_RAID_SERIAL_LEN
];/* 0xD8 - 0xE7 ascii serial number */
59 __u32 total_blocks
; /* 0xE8 - 0xEB total blocks */
60 __u32 scsi_id
; /* 0xEC - 0xEF scsi ID */
61 #define SPARE_DISK __cpu_to_le32(0x01) /* Spare */
62 #define CONFIGURED_DISK __cpu_to_le32(0x02) /* Member of some RaidDev */
63 #define FAILED_DISK __cpu_to_le32(0x04) /* Permanent failure */
64 #define USABLE_DISK __cpu_to_le32(0x08) /* Fully usable unless FAILED_DISK is set */
65 __u32 status
; /* 0xF0 - 0xF3 */
66 __u32 owner_cfg_num
; /* which config 0,1,2... owns this disk */
67 #define IMSM_DISK_FILLERS 4
68 __u32 filler
[IMSM_DISK_FILLERS
]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
71 /* RAID map configuration infos. */
73 __u32 pba_of_lba0
; /* start address of partition */
74 __u32 blocks_per_member
;/* blocks per member */
75 __u32 num_data_stripes
; /* number of data stripes */
76 __u16 blocks_per_strip
;
77 __u8 map_state
; /* Normal, Uninitialized, Degraded, Failed */
78 #define IMSM_T_STATE_NORMAL 0
79 #define IMSM_T_STATE_UNINITIALIZED 1
80 #define IMSM_T_STATE_DEGRADED 2
81 #define IMSM_T_STATE_FAILED 3
83 #define IMSM_T_RAID0 0
84 #define IMSM_T_RAID1 1
85 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
86 __u8 num_members
; /* number of member disks */
87 __u8 num_domains
; /* number of parity domains */
88 __u8 failed_disk_num
; /* valid only when state is degraded */
90 __u32 filler
[7]; /* expansion area */
91 #define IMSM_ORD_REBUILD (1 << 24)
92 __u32 disk_ord_tbl
[1]; /* disk_ord_tbl[num_members],
93 * top byte contains some flags
95 } __attribute__ ((packed
));
99 __u32 checkpoint_id
; /* id to access curr_migr_unit */
100 __u8 migr_state
; /* Normal or Migrating */
102 #define MIGR_REBUILD 1
103 #define MIGR_VERIFY 2 /* analagous to echo check > sync_action */
104 #define MIGR_GEN_MIGR 3
105 #define MIGR_STATE_CHANGE 4
106 __u8 migr_type
; /* Initializing, Rebuilding, ... */
108 __u8 fs_state
; /* fast-sync state for CnG (0xff == disabled) */
109 __u16 verify_errors
; /* number of mismatches */
110 __u16 bad_blocks
; /* number of bad blocks during verify */
112 struct imsm_map map
[1];
113 /* here comes another one if migr_state */
114 } __attribute__ ((packed
));
117 __u8 volume
[MAX_RAID_SERIAL_LEN
];
120 #define DEV_BOOTABLE __cpu_to_le32(0x01)
121 #define DEV_BOOT_DEVICE __cpu_to_le32(0x02)
122 #define DEV_READ_COALESCING __cpu_to_le32(0x04)
123 #define DEV_WRITE_COALESCING __cpu_to_le32(0x08)
124 #define DEV_LAST_SHUTDOWN_DIRTY __cpu_to_le32(0x10)
125 #define DEV_HIDDEN_AT_BOOT __cpu_to_le32(0x20)
126 #define DEV_CURRENTLY_HIDDEN __cpu_to_le32(0x40)
127 #define DEV_VERIFY_AND_FIX __cpu_to_le32(0x80)
128 #define DEV_MAP_STATE_UNINIT __cpu_to_le32(0x100)
129 #define DEV_NO_AUTO_RECOVERY __cpu_to_le32(0x200)
130 #define DEV_CLONE_N_GO __cpu_to_le32(0x400)
131 #define DEV_CLONE_MAN_SYNC __cpu_to_le32(0x800)
132 #define DEV_CNG_MASTER_DISK_NUM __cpu_to_le32(0x1000)
133 __u32 status
; /* Persistent RaidDev status */
134 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
138 __u8 cng_master_disk
;
142 #define IMSM_DEV_FILLERS 10
143 __u32 filler
[IMSM_DEV_FILLERS
];
145 } __attribute__ ((packed
));
148 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
149 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
150 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
151 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
152 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
153 __u32 error_log_size
; /* 0x30 - 0x33 in bytes */
154 __u32 attributes
; /* 0x34 - 0x37 */
155 __u8 num_disks
; /* 0x38 Number of configured disks */
156 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
157 __u8 error_log_pos
; /* 0x3A */
158 __u8 fill
[1]; /* 0x3B */
159 __u32 cache_size
; /* 0x3c - 0x40 in mb */
160 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
161 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
162 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
163 #define IMSM_FILLERS 35
164 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
165 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
166 /* here comes imsm_dev[num_raid_devs] */
167 /* here comes BBM logs */
168 } __attribute__ ((packed
));
170 #define BBM_LOG_MAX_ENTRIES 254
172 struct bbm_log_entry
{
173 __u64 defective_block_start
;
174 #define UNREADABLE 0xFFFFFFFF
175 __u32 spare_block_offset
;
176 __u16 remapped_marked_count
;
178 } __attribute__ ((__packed__
));
181 __u32 signature
; /* 0xABADB10C */
183 __u32 reserved_spare_block_count
; /* 0 */
184 __u32 reserved
; /* 0xFFFF */
185 __u64 first_spare_lba
;
186 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
187 } __attribute__ ((__packed__
));
191 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
194 static unsigned int sector_count(__u32 bytes
)
196 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
199 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
201 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
204 /* internal representation of IMSM metadata */
207 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
208 struct imsm_super
*anchor
; /* immovable parameters */
210 size_t len
; /* size of the 'buf' allocation */
211 void *next_buf
; /* for realloc'ing buf from the manager */
213 int updates_pending
; /* count of pending updates for mdmon */
214 int creating_imsm
; /* flag to indicate container creation */
215 int current_vol
; /* index of raid device undergoing creation */
216 __u32 create_offset
; /* common start for 'current_vol' */
217 #define IMSM_MAX_RAID_DEVS 2
218 struct imsm_dev
*dev_tbl
[IMSM_MAX_RAID_DEVS
];
222 __u8 serial
[MAX_RAID_SERIAL_LEN
];
225 struct imsm_disk disk
;
228 struct extent
*e
; /* for determining freespace @ create */
230 struct dl
*add
; /* list of disks to add while mdmon active */
231 struct dl
*missing
; /* disks removed while we weren't looking */
232 struct bbm_log
*bbm_log
;
236 unsigned long long start
, size
;
239 /* definition of messages passed to imsm_process_update */
240 enum imsm_update_type
{
241 update_activate_spare
,
246 struct imsm_update_activate_spare
{
247 enum imsm_update_type type
;
251 struct imsm_update_activate_spare
*next
;
254 struct imsm_update_create_array
{
255 enum imsm_update_type type
;
260 struct imsm_update_add_disk
{
261 enum imsm_update_type type
;
264 static struct supertype
*match_metadata_desc_imsm(char *arg
)
266 struct supertype
*st
;
268 if (strcmp(arg
, "imsm") != 0 &&
269 strcmp(arg
, "default") != 0
273 st
= malloc(sizeof(*st
));
274 memset(st
, 0, sizeof(*st
));
275 st
->ss
= &super_imsm
;
276 st
->max_devs
= IMSM_MAX_DEVICES
;
277 st
->minor_version
= 0;
283 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
285 return &mpb
->sig
[MPB_SIG_LEN
];
289 /* retrieve a disk directly from the anchor when the anchor is known to be
290 * up-to-date, currently only at load time
292 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
294 if (index
>= mpb
->num_disks
)
296 return &mpb
->disk
[index
];
300 /* retrieve a disk from the parsed metadata */
301 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
305 for (d
= super
->disks
; d
; d
= d
->next
)
306 if (d
->index
== index
)
313 /* generate a checksum directly from the anchor when the anchor is known to be
314 * up-to-date, currently only at load or write_super after coalescing
316 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
318 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
319 __u32
*p
= (__u32
*) mpb
;
323 sum
+= __le32_to_cpu(*p
);
327 return sum
- __le32_to_cpu(mpb
->check_sum
);
330 static size_t sizeof_imsm_map(struct imsm_map
*map
)
332 return sizeof(struct imsm_map
) + sizeof(__u32
) * (map
->num_members
- 1);
335 struct imsm_map
*get_imsm_map(struct imsm_dev
*dev
, int second_map
)
337 struct imsm_map
*map
= &dev
->vol
.map
[0];
339 if (second_map
&& !dev
->vol
.migr_state
)
341 else if (second_map
) {
344 return ptr
+ sizeof_imsm_map(map
);
350 /* return the size of the device.
351 * migr_state increases the returned size if map[0] were to be duplicated
353 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
, int migr_state
)
355 size_t size
= sizeof(*dev
) - sizeof(struct imsm_map
) +
356 sizeof_imsm_map(get_imsm_map(dev
, 0));
358 /* migrating means an additional map */
359 if (dev
->vol
.migr_state
)
360 size
+= sizeof_imsm_map(get_imsm_map(dev
, 1));
362 size
+= sizeof_imsm_map(get_imsm_map(dev
, 0));
367 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
373 if (index
>= mpb
->num_raid_devs
)
376 /* devices start after all disks */
377 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
379 for (i
= 0; i
<= index
; i
++)
381 return _mpb
+ offset
;
383 offset
+= sizeof_imsm_dev(_mpb
+ offset
, 0);
388 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
390 if (index
>= super
->anchor
->num_raid_devs
)
392 return super
->dev_tbl
[index
];
395 static __u32
get_imsm_ord_tbl_ent(struct imsm_dev
*dev
, int slot
)
397 struct imsm_map
*map
;
399 if (dev
->vol
.migr_state
)
400 map
= get_imsm_map(dev
, 1);
402 map
= get_imsm_map(dev
, 0);
404 /* top byte identifies disk under rebuild */
405 return __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
408 #define ord_to_idx(ord) (((ord) << 8) >> 8)
409 static __u32
get_imsm_disk_idx(struct imsm_dev
*dev
, int slot
)
411 __u32 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
413 return ord_to_idx(ord
);
416 static void set_imsm_ord_tbl_ent(struct imsm_map
*map
, int slot
, __u32 ord
)
418 map
->disk_ord_tbl
[slot
] = __cpu_to_le32(ord
);
421 static int get_imsm_raid_level(struct imsm_map
*map
)
423 if (map
->raid_level
== 1) {
424 if (map
->num_members
== 2)
430 return map
->raid_level
;
433 static int cmp_extent(const void *av
, const void *bv
)
435 const struct extent
*a
= av
;
436 const struct extent
*b
= bv
;
437 if (a
->start
< b
->start
)
439 if (a
->start
> b
->start
)
444 static int count_memberships(struct dl
*dl
, struct intel_super
*super
)
449 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
450 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
451 struct imsm_map
*map
= get_imsm_map(dev
, 0);
453 for (j
= 0; j
< map
->num_members
; j
++) {
454 __u32 index
= get_imsm_disk_idx(dev
, j
);
456 if (index
== dl
->index
)
464 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
466 /* find a list of used extents on the given physical device */
467 struct extent
*rv
, *e
;
469 int memberships
= count_memberships(dl
, super
);
470 __u32 reservation
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
472 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
477 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
478 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
479 struct imsm_map
*map
= get_imsm_map(dev
, 0);
481 for (j
= 0; j
< map
->num_members
; j
++) {
482 __u32 index
= get_imsm_disk_idx(dev
, j
);
484 if (index
== dl
->index
) {
485 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
486 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
491 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
493 /* determine the start of the metadata
494 * when no raid devices are defined use the default
495 * ...otherwise allow the metadata to truncate the value
496 * as is the case with older versions of imsm
499 struct extent
*last
= &rv
[memberships
- 1];
502 remainder
= __le32_to_cpu(dl
->disk
.total_blocks
) -
503 (last
->start
+ last
->size
);
504 /* round down to 1k block to satisfy precision of the kernel
508 /* make sure remainder is still sane */
509 if (remainder
< ROUND_UP(super
->len
, 512) >> 9)
510 remainder
= ROUND_UP(super
->len
, 512) >> 9;
511 if (reservation
> remainder
)
512 reservation
= remainder
;
514 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) - reservation
;
519 /* try to determine how much space is reserved for metadata from
520 * the last get_extents() entry, otherwise fallback to the
523 static __u32
imsm_reserved_sectors(struct intel_super
*super
, struct dl
*dl
)
529 /* for spares just return a minimal reservation which will grow
530 * once the spare is picked up by an array
533 return MPB_SECTOR_CNT
;
535 e
= get_extents(super
, dl
);
537 return MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
539 /* scroll to last entry */
540 for (i
= 0; e
[i
].size
; i
++)
543 rv
= __le32_to_cpu(dl
->disk
.total_blocks
) - e
[i
].start
;
551 static void print_imsm_dev(struct imsm_dev
*dev
, char *uuid
, int disk_idx
)
555 struct imsm_map
*map
= get_imsm_map(dev
, 0);
559 printf("[%.16s]:\n", dev
->volume
);
560 printf(" UUID : %s\n", uuid
);
561 printf(" RAID Level : %d\n", get_imsm_raid_level(map
));
562 printf(" Members : %d\n", map
->num_members
);
563 for (slot
= 0; slot
< map
->num_members
; slot
++)
564 if (disk_idx
== get_imsm_disk_idx(dev
, slot
))
566 if (slot
< map
->num_members
) {
567 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
568 printf(" This Slot : %d%s\n", slot
,
569 ord
& IMSM_ORD_REBUILD
? " (out-of-sync)" : "");
571 printf(" This Slot : ?\n");
572 sz
= __le32_to_cpu(dev
->size_high
);
574 sz
+= __le32_to_cpu(dev
->size_low
);
575 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
576 human_size(sz
* 512));
577 sz
= __le32_to_cpu(map
->blocks_per_member
);
578 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
579 human_size(sz
* 512));
580 printf(" Sector Offset : %u\n",
581 __le32_to_cpu(map
->pba_of_lba0
));
582 printf(" Num Stripes : %u\n",
583 __le32_to_cpu(map
->num_data_stripes
));
584 printf(" Chunk Size : %u KiB\n",
585 __le16_to_cpu(map
->blocks_per_strip
) / 2);
586 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
587 printf(" Migrate State : %s", dev
->vol
.migr_state
? "migrating" : "idle");
588 if (dev
->vol
.migr_state
)
589 printf(": %s", dev
->vol
.migr_type
? "rebuilding" : "initializing");
591 printf(" Map State : %s", map_state_str
[map
->map_state
]);
592 if (dev
->vol
.migr_state
) {
593 struct imsm_map
*map
= get_imsm_map(dev
, 1);
594 printf(" <-- %s", map_state_str
[map
->map_state
]);
597 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
600 static void print_imsm_disk(struct imsm_super
*mpb
, int index
, __u32 reserved
)
602 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
603 char str
[MAX_RAID_SERIAL_LEN
+ 1];
611 snprintf(str
, MAX_RAID_SERIAL_LEN
+ 1, "%s", disk
->serial
);
612 printf(" Disk%02d Serial : %s\n", index
, str
);
614 printf(" State :%s%s%s%s\n", s
&SPARE_DISK
? " spare" : "",
615 s
&CONFIGURED_DISK
? " active" : "",
616 s
&FAILED_DISK
? " failed" : "",
617 s
&USABLE_DISK
? " usable" : "");
618 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
619 sz
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
620 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
621 human_size(sz
* 512));
624 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
);
626 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
628 struct intel_super
*super
= st
->sb
;
629 struct imsm_super
*mpb
= super
->anchor
;
630 char str
[MAX_SIGNATURE_LENGTH
];
635 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
638 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
639 printf(" Magic : %s\n", str
);
640 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
641 printf(" Version : %s\n", get_imsm_version(mpb
));
642 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
643 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
644 getinfo_super_imsm(st
, &info
);
645 fname_from_uuid(st
, &info
, nbuf
,'-');
646 printf(" UUID : %s\n", nbuf
+ 5);
647 sum
= __le32_to_cpu(mpb
->check_sum
);
648 printf(" Checksum : %08x %s\n", sum
,
649 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
650 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
651 printf(" Disks : %d\n", mpb
->num_disks
);
652 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
653 print_imsm_disk(mpb
, super
->disks
->index
, reserved
);
654 if (super
->bbm_log
) {
655 struct bbm_log
*log
= super
->bbm_log
;
658 printf("Bad Block Management Log:\n");
659 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
660 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
661 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
662 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
663 printf(" First Spare : %llx\n", __le64_to_cpu(log
->first_spare_lba
));
665 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
667 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
669 super
->current_vol
= i
;
670 getinfo_super_imsm(st
, &info
);
671 fname_from_uuid(st
, &info
, nbuf
, '-');
672 print_imsm_dev(dev
, nbuf
+ 5, super
->disks
->index
);
674 for (i
= 0; i
< mpb
->num_disks
; i
++) {
675 if (i
== super
->disks
->index
)
677 print_imsm_disk(mpb
, i
, reserved
);
681 static void brief_examine_super_imsm(struct supertype
*st
)
683 /* We just write a generic IMSM ARRAY entry */
687 struct intel_super
*super
= st
->sb
;
690 if (!super
->anchor
->num_raid_devs
)
693 getinfo_super_imsm(st
, &info
);
694 fname_from_uuid(st
, &info
, nbuf
,'-');
695 printf("ARRAY metadata=imsm auto=md UUID=%s\n", nbuf
+ 5);
696 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
697 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
699 super
->current_vol
= i
;
700 getinfo_super_imsm(st
, &info
);
701 fname_from_uuid(st
, &info
, nbuf1
,'-');
702 printf("ARRAY /dev/md/%.16s container=%s\n"
703 " member=%d auto=mdp UUID=%s\n",
704 dev
->volume
, nbuf
+ 5, i
, nbuf1
+ 5);
708 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
713 getinfo_super_imsm(st
, &info
);
714 fname_from_uuid(st
, &info
, nbuf
,'-');
715 printf("\n UUID : %s\n", nbuf
+ 5);
718 static void brief_detail_super_imsm(struct supertype
*st
)
722 getinfo_super_imsm(st
, &info
);
723 fname_from_uuid(st
, &info
, nbuf
,'-');
724 printf(" UUID=%s", nbuf
+ 5);
728 static int match_home_imsm(struct supertype
*st
, char *homehost
)
730 /* the imsm metadata format does not specify any host
731 * identification information. We return -1 since we can never
732 * confirm nor deny whether a given array is "meant" for this
733 * host. We rely on compare_super and the 'family_num' field to
734 * exclude member disks that do not belong, and we rely on
735 * mdadm.conf to specify the arrays that should be assembled.
736 * Auto-assembly may still pick up "foreign" arrays.
742 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
744 /* The uuid returned here is used for:
745 * uuid to put into bitmap file (Create, Grow)
746 * uuid for backup header when saving critical section (Grow)
747 * comparing uuids when re-adding a device into an array
748 * In these cases the uuid required is that of the data-array,
749 * not the device-set.
750 * uuid to recognise same set when adding a missing device back
751 * to an array. This is a uuid for the device-set.
753 * For each of these we can make do with a truncated
754 * or hashed uuid rather than the original, as long as
756 * In each case the uuid required is that of the data-array,
757 * not the device-set.
759 /* imsm does not track uuid's so we synthesis one using sha1 on
760 * - The signature (Which is constant for all imsm array, but no matter)
761 * - the family_num of the container
762 * - the index number of the volume
763 * - the 'serial' number of the volume.
764 * Hopefully these are all constant.
766 struct intel_super
*super
= st
->sb
;
770 struct imsm_dev
*dev
= NULL
;
773 sha1_process_bytes(super
->anchor
->sig
, MPB_SIG_LEN
, &ctx
);
774 sha1_process_bytes(&super
->anchor
->family_num
, sizeof(__u32
), &ctx
);
775 if (super
->current_vol
>= 0)
776 dev
= get_imsm_dev(super
, super
->current_vol
);
778 __u32 vol
= super
->current_vol
;
779 sha1_process_bytes(&vol
, sizeof(vol
), &ctx
);
780 sha1_process_bytes(dev
->volume
, MAX_RAID_SERIAL_LEN
, &ctx
);
782 sha1_finish_ctx(&ctx
, buf
);
783 memcpy(uuid
, buf
, 4*4);
788 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
790 __u8
*v
= get_imsm_version(mpb
);
791 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
792 char major
[] = { 0, 0, 0 };
793 char minor
[] = { 0 ,0, 0 };
794 char patch
[] = { 0, 0, 0 };
795 char *ver_parse
[] = { major
, minor
, patch
};
799 while (*v
!= '\0' && v
< end
) {
800 if (*v
!= '.' && j
< 2)
801 ver_parse
[i
][j
++] = *v
;
809 *m
= strtol(minor
, NULL
, 0);
810 *p
= strtol(patch
, NULL
, 0);
814 static int imsm_level_to_layout(int level
)
822 return ALGORITHM_LEFT_ASYMMETRIC
;
829 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
)
831 struct intel_super
*super
= st
->sb
;
832 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
833 struct imsm_map
*map
= get_imsm_map(dev
, 0);
835 info
->container_member
= super
->current_vol
;
836 info
->array
.raid_disks
= map
->num_members
;
837 info
->array
.level
= get_imsm_raid_level(map
);
838 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
839 info
->array
.md_minor
= -1;
840 info
->array
.ctime
= 0;
841 info
->array
.utime
= 0;
842 info
->array
.chunk_size
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
843 info
->array
.state
= !dev
->vol
.dirty
;
845 info
->disk
.major
= 0;
846 info
->disk
.minor
= 0;
848 info
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
849 info
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
850 memset(info
->uuid
, 0, sizeof(info
->uuid
));
852 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
|| dev
->vol
.dirty
)
853 info
->resync_start
= 0;
854 else if (dev
->vol
.migr_state
)
855 info
->resync_start
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
857 info
->resync_start
= ~0ULL;
859 strncpy(info
->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
860 info
->name
[MAX_RAID_SERIAL_LEN
] = 0;
862 info
->array
.major_version
= -1;
863 info
->array
.minor_version
= -2;
864 sprintf(info
->text_version
, "/%s/%d",
865 devnum2devname(st
->container_dev
),
866 info
->container_member
);
867 info
->safe_mode_delay
= 4000; /* 4 secs like the Matrix driver */
868 uuid_from_super_imsm(st
, info
->uuid
);
872 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
)
874 struct intel_super
*super
= st
->sb
;
875 struct imsm_disk
*disk
;
878 if (super
->current_vol
>= 0) {
879 getinfo_super_imsm_volume(st
, info
);
883 /* Set raid_disks to zero so that Assemble will always pull in valid
886 info
->array
.raid_disks
= 0;
887 info
->array
.level
= LEVEL_CONTAINER
;
888 info
->array
.layout
= 0;
889 info
->array
.md_minor
= -1;
890 info
->array
.ctime
= 0; /* N/A for imsm */
891 info
->array
.utime
= 0;
892 info
->array
.chunk_size
= 0;
894 info
->disk
.major
= 0;
895 info
->disk
.minor
= 0;
896 info
->disk
.raid_disk
= -1;
897 info
->reshape_active
= 0;
898 info
->array
.major_version
= -1;
899 info
->array
.minor_version
= -2;
900 strcpy(info
->text_version
, "imsm");
901 info
->safe_mode_delay
= 0;
902 info
->disk
.number
= -1;
903 info
->disk
.state
= 0;
907 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
909 disk
= &super
->disks
->disk
;
910 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
911 info
->component_size
= reserved
;
913 info
->disk
.state
= s
& CONFIGURED_DISK
? (1 << MD_DISK_ACTIVE
) : 0;
914 info
->disk
.state
|= s
& FAILED_DISK
? (1 << MD_DISK_FAULTY
) : 0;
915 info
->disk
.state
|= s
& SPARE_DISK
? 0 : (1 << MD_DISK_SYNC
);
918 /* only call uuid_from_super_imsm when this disk is part of a populated container,
919 * ->compare_super may have updated the 'num_raid_devs' field for spares
921 if (info
->disk
.state
& (1 << MD_DISK_SYNC
) || super
->anchor
->num_raid_devs
)
922 uuid_from_super_imsm(st
, info
->uuid
);
924 memcpy(info
->uuid
, uuid_match_any
, sizeof(int[4]));
927 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
928 char *update
, char *devname
, int verbose
,
929 int uuid_set
, char *homehost
)
933 /* For 'assemble' and 'force' we need to return non-zero if any
934 * change was made. For others, the return value is ignored.
935 * Update options are:
936 * force-one : This device looks a bit old but needs to be included,
937 * update age info appropriately.
938 * assemble: clear any 'faulty' flag to allow this device to
940 * force-array: Array is degraded but being forced, mark it clean
941 * if that will be needed to assemble it.
943 * newdev: not used ????
944 * grow: Array has gained a new device - this is currently for
946 * resync: mark as dirty so a resync will happen.
947 * name: update the name - preserving the homehost
949 * Following are not relevant for this imsm:
950 * sparc2.2 : update from old dodgey metadata
951 * super-minor: change the preferred_minor number
952 * summaries: update redundant counters.
953 * uuid: Change the uuid of the array to match watch is given
954 * homehost: update the recorded homehost
955 * _reshape_progress: record new reshape_progress position.
958 //struct intel_super *super = st->sb;
959 //struct imsm_super *mpb = super->mpb;
961 if (strcmp(update
, "grow") == 0) {
963 if (strcmp(update
, "resync") == 0) {
964 /* dev->vol.dirty = 1; */
967 /* IMSM has no concept of UUID or homehost */
972 static size_t disks_to_mpb_size(int disks
)
976 size
= sizeof(struct imsm_super
);
977 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
978 size
+= 2 * sizeof(struct imsm_dev
);
979 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
980 size
+= (4 - 2) * sizeof(struct imsm_map
);
981 /* 4 possible disk_ord_tbl's */
982 size
+= 4 * (disks
- 1) * sizeof(__u32
);
987 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
989 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
992 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
995 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
999 * 0 same, or first was empty, and second was copied
1000 * 1 second had wrong number
1002 * 3 wrong other info
1004 struct intel_super
*first
= st
->sb
;
1005 struct intel_super
*sec
= tst
->sb
;
1013 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
) != 0)
1016 /* if an anchor does not have num_raid_devs set then it is a free
1019 if (first
->anchor
->num_raid_devs
> 0 &&
1020 sec
->anchor
->num_raid_devs
> 0) {
1021 if (first
->anchor
->family_num
!= sec
->anchor
->family_num
)
1025 /* if 'first' is a spare promote it to a populated mpb with sec's
1028 if (first
->anchor
->num_raid_devs
== 0 &&
1029 sec
->anchor
->num_raid_devs
> 0) {
1032 /* we need to copy raid device info from sec if an allocation
1033 * fails here we don't associate the spare
1035 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++) {
1036 first
->dev_tbl
[i
] = malloc(sizeof(struct imsm_dev
));
1037 if (!first
->dev_tbl
) {
1039 free(first
->dev_tbl
[i
]);
1040 first
->dev_tbl
[i
] = NULL
;
1042 fprintf(stderr
, "imsm: failed to associate spare\n");
1045 *first
->dev_tbl
[i
] = *sec
->dev_tbl
[i
];
1048 first
->anchor
->num_raid_devs
= sec
->anchor
->num_raid_devs
;
1049 first
->anchor
->family_num
= sec
->anchor
->family_num
;
1055 static void fd2devname(int fd
, char *name
)
1064 if (fstat(fd
, &st
) != 0)
1066 sprintf(path
, "/sys/dev/block/%d:%d",
1067 major(st
.st_rdev
), minor(st
.st_rdev
));
1069 rv
= readlink(path
, dname
, sizeof(dname
));
1074 nm
= strrchr(dname
, '/');
1076 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
1080 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
1082 static int imsm_read_serial(int fd
, char *devname
,
1083 __u8 serial
[MAX_RAID_SERIAL_LEN
])
1085 unsigned char scsi_serial
[255];
1091 memset(scsi_serial
, 0, sizeof(scsi_serial
));
1093 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
1095 if (rv
&& check_env("IMSM_DEVNAME_AS_SERIAL")) {
1096 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1097 fd2devname(fd
, (char *) serial
);
1104 Name
": Failed to retrieve serial for %s\n",
1109 /* trim leading whitespace */
1110 rsp_len
= scsi_serial
[3];
1111 rsp_buf
= (char *) &scsi_serial
[4];
1116 /* truncate len to the end of rsp_buf if necessary */
1117 if (c
+ MAX_RAID_SERIAL_LEN
> rsp_buf
+ rsp_len
)
1118 len
= rsp_len
- (c
- rsp_buf
);
1120 len
= MAX_RAID_SERIAL_LEN
;
1122 /* initialize the buffer and copy rsp_buf characters */
1123 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
1124 memcpy(serial
, c
, len
);
1126 /* trim trailing whitespace starting with the last character copied */
1127 c
= (char *) &serial
[len
- 1];
1128 while (isspace(*c
) || *c
== '\0')
1134 static int serialcmp(__u8
*s1
, __u8
*s2
)
1136 return strncmp((char *) s1
, (char *) s2
, MAX_RAID_SERIAL_LEN
);
1139 static void serialcpy(__u8
*dest
, __u8
*src
)
1141 strncpy((char *) dest
, (char *) src
, MAX_RAID_SERIAL_LEN
);
1145 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
1152 __u8 serial
[MAX_RAID_SERIAL_LEN
];
1154 rv
= imsm_read_serial(fd
, devname
, serial
);
1159 /* check if this is a disk we have seen before. it may be a spare in
1160 * super->disks while the current anchor believes it is a raid member,
1161 * check if we need to update dl->index
1163 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1164 if (serialcmp(dl
->serial
, serial
) == 0)
1168 dl
= malloc(sizeof(*dl
));
1175 Name
": failed to allocate disk buffer for %s\n",
1182 dl
->major
= major(stb
.st_rdev
);
1183 dl
->minor
= minor(stb
.st_rdev
);
1184 dl
->next
= super
->disks
;
1185 dl
->fd
= keep_fd
? fd
: -1;
1186 dl
->devname
= devname
? strdup(devname
) : NULL
;
1187 serialcpy(dl
->serial
, serial
);
1190 } else if (keep_fd
) {
1195 /* look up this disk's index in the current anchor */
1196 for (i
= 0; i
< super
->anchor
->num_disks
; i
++) {
1197 struct imsm_disk
*disk_iter
;
1199 disk_iter
= __get_imsm_disk(super
->anchor
, i
);
1201 if (serialcmp(disk_iter
->serial
, dl
->serial
) == 0) {
1202 dl
->disk
= *disk_iter
;
1203 /* only set index on disks that are a member of a
1204 * populated contianer, i.e. one with raid_devs
1206 if (dl
->disk
.status
& FAILED_DISK
)
1208 else if (dl
->disk
.status
& SPARE_DISK
)
1217 /* no match, maybe a stale failed drive */
1218 if (i
== super
->anchor
->num_disks
&& dl
->index
>= 0) {
1219 dl
->disk
= *__get_imsm_disk(super
->anchor
, dl
->index
);
1220 if (dl
->disk
.status
& FAILED_DISK
)
1230 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
1232 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
1236 /* When migrating map0 contains the 'destination' state while map1
1237 * contains the current state. When not migrating map0 contains the
1238 * current state. This routine assumes that map[0].map_state is set to
1239 * the current array state before being called.
1241 * Migration is indicated by one of the following states
1242 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
1243 * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal
1244 * map1state=unitialized)
1245 * 3/ Verify (Resync) (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
1247 * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
1248 * map1state=degraded)
1250 static void migrate(struct imsm_dev
*dev
, __u8 to_state
, int rebuild_resync
)
1252 struct imsm_map
*dest
;
1253 struct imsm_map
*src
= get_imsm_map(dev
, 0);
1255 dev
->vol
.migr_state
= 1;
1256 dev
->vol
.migr_type
= rebuild_resync
;
1257 dev
->vol
.curr_migr_unit
= 0;
1258 dest
= get_imsm_map(dev
, 1);
1260 memcpy(dest
, src
, sizeof_imsm_map(src
));
1261 src
->map_state
= to_state
;
1264 static void end_migration(struct imsm_dev
*dev
, __u8 map_state
)
1266 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1268 dev
->vol
.migr_state
= 0;
1269 dev
->vol
.curr_migr_unit
= 0;
1270 map
->map_state
= map_state
;
1274 static int parse_raid_devices(struct intel_super
*super
)
1277 struct imsm_dev
*dev_new
;
1278 size_t len
, len_migr
;
1279 size_t space_needed
= 0;
1280 struct imsm_super
*mpb
= super
->anchor
;
1282 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
1283 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
1285 len
= sizeof_imsm_dev(dev_iter
, 0);
1286 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
1288 space_needed
+= len_migr
- len
;
1290 dev_new
= malloc(len_migr
);
1293 imsm_copy_dev(dev_new
, dev_iter
);
1294 super
->dev_tbl
[i
] = dev_new
;
1297 /* ensure that super->buf is large enough when all raid devices
1300 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
1303 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
1304 if (posix_memalign(&buf
, 512, len
) != 0)
1307 memcpy(buf
, super
->buf
, len
);
1316 /* retrieve a pointer to the bbm log which starts after all raid devices */
1317 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
1321 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
1323 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
1329 static void __free_imsm(struct intel_super
*super
, int free_disks
);
1331 /* load_imsm_mpb - read matrix metadata
1332 * allocates super->mpb to be freed by free_super
1334 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
1336 unsigned long long dsize
;
1337 unsigned long long sectors
;
1339 struct imsm_super
*anchor
;
1343 get_dev_size(fd
, NULL
, &dsize
);
1345 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
1348 Name
": Cannot seek to anchor block on %s: %s\n",
1349 devname
, strerror(errno
));
1353 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
1356 Name
": Failed to allocate imsm anchor buffer"
1357 " on %s\n", devname
);
1360 if (read(fd
, anchor
, 512) != 512) {
1363 Name
": Cannot read anchor block on %s: %s\n",
1364 devname
, strerror(errno
));
1369 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
1372 Name
": no IMSM anchor on %s\n", devname
);
1377 __free_imsm(super
, 0);
1378 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
1379 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
1382 Name
": unable to allocate %zu byte mpb buffer\n",
1387 memcpy(super
->buf
, anchor
, 512);
1389 sectors
= mpb_sectors(anchor
) - 1;
1392 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1394 rc
= parse_raid_devices(super
);
1398 /* read the extended mpb */
1399 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
1402 Name
": Cannot seek to extended mpb on %s: %s\n",
1403 devname
, strerror(errno
));
1407 if (read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
1410 Name
": Cannot read extended mpb on %s: %s\n",
1411 devname
, strerror(errno
));
1415 check_sum
= __gen_imsm_checksum(super
->anchor
);
1416 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
1419 Name
": IMSM checksum %x != %x on %s\n",
1420 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
1425 /* FIXME the BBM log is disk specific so we cannot use this global
1426 * buffer for all disks. Ok for now since we only look at the global
1427 * bbm_log_size parameter to gate assembly
1429 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
1431 rc
= load_imsm_disk(fd
, super
, devname
, 0);
1433 rc
= parse_raid_devices(super
);
1438 static void __free_imsm_disk(struct dl
*d
)
1449 static void free_imsm_disks(struct intel_super
*super
)
1453 while (super
->disks
) {
1455 super
->disks
= d
->next
;
1456 __free_imsm_disk(d
);
1458 while (super
->missing
) {
1460 super
->missing
= d
->next
;
1461 __free_imsm_disk(d
);
1466 /* free all the pieces hanging off of a super pointer */
1467 static void __free_imsm(struct intel_super
*super
, int free_disks
)
1476 free_imsm_disks(super
);
1477 for (i
= 0; i
< IMSM_MAX_RAID_DEVS
; i
++)
1478 if (super
->dev_tbl
[i
]) {
1479 free(super
->dev_tbl
[i
]);
1480 super
->dev_tbl
[i
] = NULL
;
1484 static void free_imsm(struct intel_super
*super
)
1486 __free_imsm(super
, 1);
1490 static void free_super_imsm(struct supertype
*st
)
1492 struct intel_super
*super
= st
->sb
;
1501 static struct intel_super
*alloc_super(int creating_imsm
)
1503 struct intel_super
*super
= malloc(sizeof(*super
));
1506 memset(super
, 0, sizeof(*super
));
1507 super
->creating_imsm
= creating_imsm
;
1508 super
->current_vol
= -1;
1509 super
->create_offset
= ~((__u32
) 0);
1516 /* find_missing - helper routine for load_super_imsm_all that identifies
1517 * disks that have disappeared from the system. This routine relies on
1518 * the mpb being uptodate, which it is at load time.
1520 static int find_missing(struct intel_super
*super
)
1523 struct imsm_super
*mpb
= super
->anchor
;
1525 struct imsm_disk
*disk
;
1527 for (i
= 0; i
< mpb
->num_disks
; i
++) {
1528 disk
= __get_imsm_disk(mpb
, i
);
1529 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1530 if (serialcmp(dl
->disk
.serial
, disk
->serial
) == 0)
1534 /* ok we have a 'disk' without a live entry in
1537 if (disk
->status
& FAILED_DISK
|| !(disk
->status
& USABLE_DISK
))
1538 continue; /* never mind, already marked */
1540 dl
= malloc(sizeof(*dl
));
1546 dl
->devname
= strdup("missing");
1548 serialcpy(dl
->serial
, disk
->serial
);
1550 dl
->next
= super
->missing
;
1551 super
->missing
= dl
;
1557 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
1558 char *devname
, int keep_fd
)
1561 struct intel_super
*super
;
1562 struct mdinfo
*sd
, *best
= NULL
;
1569 /* check if this disk is a member of an active array */
1570 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
1574 if (sra
->array
.major_version
!= -1 ||
1575 sra
->array
.minor_version
!= -2 ||
1576 strcmp(sra
->text_version
, "imsm") != 0)
1579 super
= alloc_super(0);
1583 /* find the most up to date disk in this array, skipping spares */
1584 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1585 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1586 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1591 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1595 if (super
->anchor
->num_raid_devs
== 0)
1598 gen
= __le32_to_cpu(super
->anchor
->generation_num
);
1599 if (!best
|| gen
> bestgen
) {
1614 /* load the most up to date anchor */
1615 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
1616 dfd
= dev_open(nm
, O_RDONLY
);
1621 rv
= load_imsm_mpb(dfd
, super
, NULL
);
1628 /* re-parse the disk list with the current anchor */
1629 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
1630 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
1631 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
1636 load_imsm_disk(dfd
, super
, NULL
, keep_fd
);
1642 if (find_missing(super
) != 0) {
1647 if (st
->subarray
[0]) {
1648 if (atoi(st
->subarray
) <= super
->anchor
->num_raid_devs
)
1649 super
->current_vol
= atoi(st
->subarray
);
1655 st
->container_dev
= fd2devnum(fd
);
1656 if (st
->ss
== NULL
) {
1657 st
->ss
= &super_imsm
;
1658 st
->minor_version
= 0;
1659 st
->max_devs
= IMSM_MAX_DEVICES
;
1661 st
->loaded_container
= 1;
1667 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
1669 struct intel_super
*super
;
1673 if (load_super_imsm_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
1676 if (st
->subarray
[0])
1677 return 1; /* FIXME */
1679 super
= alloc_super(0);
1682 Name
": malloc of %zu failed.\n",
1687 rv
= load_imsm_mpb(fd
, super
, devname
);
1692 Name
": Failed to load all information "
1693 "sections on %s\n", devname
);
1699 if (st
->ss
== NULL
) {
1700 st
->ss
= &super_imsm
;
1701 st
->minor_version
= 0;
1702 st
->max_devs
= IMSM_MAX_DEVICES
;
1704 st
->loaded_container
= 0;
1709 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
1711 if (info
->level
== 1)
1713 return info
->chunk_size
>> 9;
1716 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
)
1720 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
1721 if (info
->level
== 1)
1727 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
1729 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
1732 static void imsm_update_version_info(struct intel_super
*super
)
1734 /* update the version and attributes */
1735 struct imsm_super
*mpb
= super
->anchor
;
1737 struct imsm_dev
*dev
;
1738 struct imsm_map
*map
;
1741 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1742 dev
= get_imsm_dev(super
, i
);
1743 map
= get_imsm_map(dev
, 0);
1744 if (__le32_to_cpu(dev
->size_high
) > 0)
1745 mpb
->attributes
|= MPB_ATTRIB_2TB
;
1747 /* FIXME detect when an array spans a port multiplier */
1749 mpb
->attributes
|= MPB_ATTRIB_PM
;
1752 if (mpb
->num_raid_devs
> 1 ||
1753 mpb
->attributes
!= MPB_ATTRIB_CHECKSUM_VERIFY
) {
1754 version
= MPB_VERSION_ATTRIBS
;
1755 switch (get_imsm_raid_level(map
)) {
1756 case 0: mpb
->attributes
|= MPB_ATTRIB_RAID0
; break;
1757 case 1: mpb
->attributes
|= MPB_ATTRIB_RAID1
; break;
1758 case 10: mpb
->attributes
|= MPB_ATTRIB_RAID10
; break;
1759 case 5: mpb
->attributes
|= MPB_ATTRIB_RAID5
; break;
1762 if (map
->num_members
>= 5)
1763 version
= MPB_VERSION_5OR6_DISK_ARRAY
;
1764 else if (dev
->status
== DEV_CLONE_N_GO
)
1765 version
= MPB_VERSION_CNG
;
1766 else if (get_imsm_raid_level(map
) == 5)
1767 version
= MPB_VERSION_RAID5
;
1768 else if (map
->num_members
>= 3)
1769 version
= MPB_VERSION_3OR4_DISK_ARRAY
;
1770 else if (get_imsm_raid_level(map
) == 1)
1771 version
= MPB_VERSION_RAID1
;
1773 version
= MPB_VERSION_RAID0
;
1775 strcpy(((char *) mpb
->sig
) + strlen(MPB_SIGNATURE
), version
);
1779 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
1780 unsigned long long size
, char *name
,
1781 char *homehost
, int *uuid
)
1783 /* We are creating a volume inside a pre-existing container.
1784 * so st->sb is already set.
1786 struct intel_super
*super
= st
->sb
;
1787 struct imsm_super
*mpb
= super
->anchor
;
1788 struct imsm_dev
*dev
;
1789 struct imsm_vol
*vol
;
1790 struct imsm_map
*map
;
1791 int idx
= mpb
->num_raid_devs
;
1793 unsigned long long array_blocks
;
1794 size_t size_old
, size_new
;
1796 if (mpb
->num_raid_devs
>= 2) {
1797 fprintf(stderr
, Name
": This imsm-container already has the "
1798 "maximum of 2 volumes\n");
1802 /* ensure the mpb is large enough for the new data */
1803 size_old
= __le32_to_cpu(mpb
->mpb_size
);
1804 size_new
= disks_to_mpb_size(info
->nr_disks
);
1805 if (size_new
> size_old
) {
1807 size_t size_round
= ROUND_UP(size_new
, 512);
1809 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
1810 fprintf(stderr
, Name
": could not allocate new mpb\n");
1813 memcpy(mpb_new
, mpb
, size_old
);
1816 super
->anchor
= mpb_new
;
1817 mpb
->mpb_size
= __cpu_to_le32(size_new
);
1818 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
1820 super
->current_vol
= idx
;
1821 /* when creating the first raid device in this container set num_disks
1822 * to zero, i.e. delete this spare and add raid member devices in
1823 * add_to_super_imsm_volume()
1825 if (super
->current_vol
== 0)
1827 sprintf(st
->subarray
, "%d", idx
);
1828 dev
= malloc(sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
1830 fprintf(stderr
, Name
": could not allocate raid device\n");
1833 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
1834 if (info
->level
== 1)
1835 array_blocks
= info_to_blocks_per_member(info
);
1837 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
1838 info
->layout
, info
->chunk_size
,
1840 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
1841 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
1842 dev
->status
= __cpu_to_le32(0);
1843 dev
->reserved_blocks
= __cpu_to_le32(0);
1845 vol
->migr_state
= 0;
1846 vol
->migr_type
= MIGR_INIT
;
1848 vol
->curr_migr_unit
= 0;
1849 map
= get_imsm_map(dev
, 0);
1850 map
->pba_of_lba0
= __cpu_to_le32(super
->create_offset
);
1851 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
1852 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
1853 map
->num_data_stripes
= __cpu_to_le32(info_to_num_data_stripes(info
));
1854 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
1855 IMSM_T_STATE_NORMAL
;
1857 if (info
->level
== 1 && info
->raid_disks
> 2) {
1858 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
1859 "in a raid1 volume\n");
1862 if (info
->level
== 10) {
1863 map
->raid_level
= 1;
1864 map
->num_domains
= info
->raid_disks
/ 2;
1866 map
->raid_level
= info
->level
;
1867 map
->num_domains
= !!map
->raid_level
;
1870 map
->num_members
= info
->raid_disks
;
1871 for (i
= 0; i
< map
->num_members
; i
++) {
1872 /* initialized in add_to_super */
1873 set_imsm_ord_tbl_ent(map
, i
, 0);
1875 mpb
->num_raid_devs
++;
1876 super
->dev_tbl
[super
->current_vol
] = dev
;
1878 imsm_update_version_info(super
);
1883 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
1884 unsigned long long size
, char *name
,
1885 char *homehost
, int *uuid
)
1887 /* This is primarily called by Create when creating a new array.
1888 * We will then get add_to_super called for each component, and then
1889 * write_init_super called to write it out to each device.
1890 * For IMSM, Create can create on fresh devices or on a pre-existing
1892 * To create on a pre-existing array a different method will be called.
1893 * This one is just for fresh drives.
1895 struct intel_super
*super
;
1896 struct imsm_super
*mpb
;
1905 return init_super_imsm_volume(st
, info
, size
, name
, homehost
,
1908 super
= alloc_super(1);
1911 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
1912 if (posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
1917 memset(mpb
, 0, mpb_size
);
1919 mpb
->attributes
= MPB_ATTRIB_CHECKSUM_VERIFY
;
1921 version
= (char *) mpb
->sig
;
1922 strcpy(version
, MPB_SIGNATURE
);
1923 version
+= strlen(MPB_SIGNATURE
);
1924 strcpy(version
, MPB_VERSION_RAID0
);
1925 mpb
->mpb_size
= mpb_size
;
1932 static int add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
1933 int fd
, char *devname
)
1935 struct intel_super
*super
= st
->sb
;
1936 struct imsm_super
*mpb
= super
->anchor
;
1938 struct imsm_dev
*dev
;
1939 struct imsm_map
*map
;
1941 dev
= get_imsm_dev(super
, super
->current_vol
);
1942 map
= get_imsm_map(dev
, 0);
1944 if (! (dk
->state
& (1<<MD_DISK_SYNC
))) {
1945 fprintf(stderr
, Name
": %s: Cannot add spare devices to IMSM volume\n",
1950 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1951 if (dl
->major
== dk
->major
&&
1952 dl
->minor
== dk
->minor
)
1956 fprintf(stderr
, Name
": %s is not a member of the same container\n", devname
);
1960 /* add a pristine spare to the metadata */
1961 if (dl
->index
< 0) {
1962 dl
->index
= super
->anchor
->num_disks
;
1963 super
->anchor
->num_disks
++;
1965 set_imsm_ord_tbl_ent(map
, dk
->number
, dl
->index
);
1966 dl
->disk
.status
= CONFIGURED_DISK
| USABLE_DISK
;
1968 /* if we are creating the first raid device update the family number */
1969 if (super
->current_vol
== 0) {
1971 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
1972 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
1976 sum
= __gen_imsm_checksum(mpb
);
1977 mpb
->family_num
= __cpu_to_le32(sum
);
1983 static int add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
1984 int fd
, char *devname
)
1986 struct intel_super
*super
= st
->sb
;
1988 unsigned long long size
;
1993 if (super
->current_vol
>= 0)
1994 return add_to_super_imsm_volume(st
, dk
, fd
, devname
);
1997 dd
= malloc(sizeof(*dd
));
2000 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
2003 memset(dd
, 0, sizeof(*dd
));
2004 dd
->major
= major(stb
.st_rdev
);
2005 dd
->minor
= minor(stb
.st_rdev
);
2007 dd
->devname
= devname
? strdup(devname
) : NULL
;
2009 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
2012 Name
": failed to retrieve scsi serial, aborting\n");
2017 get_dev_size(fd
, NULL
, &size
);
2019 serialcpy(dd
->disk
.serial
, dd
->serial
);
2020 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
2021 dd
->disk
.status
= USABLE_DISK
| SPARE_DISK
;
2022 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
2023 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
2025 dd
->disk
.scsi_id
= __cpu_to_le32(0);
2027 if (st
->update_tail
) {
2028 dd
->next
= super
->add
;
2031 dd
->next
= super
->disks
;
2038 static int store_imsm_mpb(int fd
, struct intel_super
*super
);
2040 /* spare records have their own family number and do not have any defined raid
2043 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
2045 struct imsm_super mpb_save
;
2046 struct imsm_super
*mpb
= super
->anchor
;
2051 mpb
->num_raid_devs
= 0;
2053 mpb
->mpb_size
= sizeof(struct imsm_super
);
2054 mpb
->generation_num
= __cpu_to_le32(1UL);
2056 for (d
= super
->disks
; d
; d
= d
->next
) {
2060 mpb
->disk
[0] = d
->disk
;
2061 sum
= __gen_imsm_checksum(mpb
);
2062 mpb
->family_num
= __cpu_to_le32(sum
);
2063 sum
= __gen_imsm_checksum(mpb
);
2064 mpb
->check_sum
= __cpu_to_le32(sum
);
2066 if (store_imsm_mpb(d
->fd
, super
)) {
2067 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
2068 __func__
, d
->major
, d
->minor
, strerror(errno
));
2082 static int write_super_imsm(struct intel_super
*super
, int doclose
)
2084 struct imsm_super
*mpb
= super
->anchor
;
2090 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
2092 /* 'generation' is incremented everytime the metadata is written */
2093 generation
= __le32_to_cpu(mpb
->generation_num
);
2095 mpb
->generation_num
= __cpu_to_le32(generation
);
2097 mpb_size
+= sizeof(struct imsm_disk
) * mpb
->num_disks
;
2098 for (d
= super
->disks
; d
; d
= d
->next
) {
2102 mpb
->disk
[d
->index
] = d
->disk
;
2104 for (d
= super
->missing
; d
; d
= d
->next
)
2105 mpb
->disk
[d
->index
] = d
->disk
;
2107 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2108 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
2110 imsm_copy_dev(dev
, super
->dev_tbl
[i
]);
2111 mpb_size
+= sizeof_imsm_dev(dev
, 0);
2113 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
2114 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
2116 /* recalculate checksum */
2117 sum
= __gen_imsm_checksum(mpb
);
2118 mpb
->check_sum
= __cpu_to_le32(sum
);
2120 /* write the mpb for disks that compose raid devices */
2121 for (d
= super
->disks
; d
; d
= d
->next
) {
2124 if (store_imsm_mpb(d
->fd
, super
))
2125 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
2126 __func__
, d
->major
, d
->minor
, strerror(errno
));
2134 return write_super_imsm_spares(super
, doclose
);
2140 static int create_array(struct supertype
*st
)
2143 struct imsm_update_create_array
*u
;
2144 struct intel_super
*super
= st
->sb
;
2145 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
2147 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0);
2150 fprintf(stderr
, "%s: failed to allocate update buffer\n",
2155 u
->type
= update_create_array
;
2156 u
->dev_idx
= super
->current_vol
;
2157 imsm_copy_dev(&u
->dev
, dev
);
2158 append_metadata_update(st
, u
, len
);
2163 static int _add_disk(struct supertype
*st
)
2165 struct intel_super
*super
= st
->sb
;
2167 struct imsm_update_add_disk
*u
;
2175 fprintf(stderr
, "%s: failed to allocate update buffer\n",
2180 u
->type
= update_add_disk
;
2181 append_metadata_update(st
, u
, len
);
2186 static int write_init_super_imsm(struct supertype
*st
)
2188 if (st
->update_tail
) {
2189 /* queue the recently created array / added disk
2190 * as a metadata update */
2191 struct intel_super
*super
= st
->sb
;
2195 /* determine if we are creating a volume or adding a disk */
2196 if (super
->current_vol
< 0) {
2197 /* in the add disk case we are running in mdmon
2198 * context, so don't close fd's
2200 return _add_disk(st
);
2202 rv
= create_array(st
);
2204 for (d
= super
->disks
; d
; d
= d
->next
) {
2211 return write_super_imsm(st
->sb
, 1);
2215 static int store_zero_imsm(struct supertype
*st
, int fd
)
2217 unsigned long long dsize
;
2220 get_dev_size(fd
, NULL
, &dsize
);
2222 /* first block is stored on second to last sector of the disk */
2223 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
2226 if (posix_memalign(&buf
, 512, 512) != 0)
2229 memset(buf
, 0, 512);
2230 if (write(fd
, buf
, 512) != 512)
2235 static int imsm_bbm_log_size(struct imsm_super
*mpb
)
2237 return __le32_to_cpu(mpb
->bbm_log_size
);
2241 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
2242 int layout
, int raiddisks
, int chunk
,
2243 unsigned long long size
, char *dev
,
2244 unsigned long long *freesize
,
2248 unsigned long long ldsize
;
2250 if (level
!= LEVEL_CONTAINER
)
2255 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2258 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
2259 dev
, strerror(errno
));
2262 if (!get_dev_size(fd
, dev
, &ldsize
)) {
2268 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
2273 static unsigned long long find_size(struct extent
*e
, int *idx
, int num_extents
)
2275 const unsigned long long base_start
= e
[*idx
].start
;
2276 unsigned long long end
= base_start
+ e
[*idx
].size
;
2279 if (base_start
== end
)
2283 for (i
= *idx
; i
< num_extents
; i
++) {
2284 /* extend overlapping extents */
2285 if (e
[i
].start
>= base_start
&&
2286 e
[i
].start
<= end
) {
2289 if (e
[i
].start
+ e
[i
].size
> end
)
2290 end
= e
[i
].start
+ e
[i
].size
;
2291 } else if (e
[i
].start
> end
) {
2297 return end
- base_start
;
2300 static unsigned long long merge_extents(struct intel_super
*super
, int sum_extents
)
2302 /* build a composite disk with all known extents and generate a new
2303 * 'maxsize' given the "all disks in an array must share a common start
2304 * offset" constraint
2306 struct extent
*e
= calloc(sum_extents
, sizeof(*e
));
2310 unsigned long long pos
;
2311 unsigned long long start
;
2312 unsigned long long maxsize
;
2313 unsigned long reserve
;
2316 return ~0ULL; /* error */
2318 /* coalesce and sort all extents. also, check to see if we need to
2319 * reserve space between member arrays
2322 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2325 for (i
= 0; i
< dl
->extent_cnt
; i
++)
2328 qsort(e
, sum_extents
, sizeof(*e
), cmp_extent
);
2333 while (i
< sum_extents
) {
2334 e
[j
].start
= e
[i
].start
;
2335 e
[j
].size
= find_size(e
, &i
, sum_extents
);
2337 if (e
[j
-1].size
== 0)
2346 unsigned long long esize
;
2348 esize
= e
[i
].start
- pos
;
2349 if (esize
>= maxsize
) {
2354 pos
= e
[i
].start
+ e
[i
].size
;
2356 } while (e
[i
-1].size
);
2359 if (start_extent
> 0)
2360 reserve
= IMSM_RESERVED_SECTORS
; /* gap between raid regions */
2364 if (maxsize
< reserve
)
2367 super
->create_offset
= ~((__u32
) 0);
2368 if (start
+ reserve
> super
->create_offset
)
2369 return ~0ULL; /* start overflows create_offset */
2370 super
->create_offset
= start
+ reserve
;
2372 return maxsize
- reserve
;
2375 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
2376 * FIX ME add ahci details
2378 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
2379 int layout
, int raiddisks
, int chunk
,
2380 unsigned long long size
, char *dev
,
2381 unsigned long long *freesize
,
2385 struct intel_super
*super
= st
->sb
;
2387 unsigned long long pos
= 0;
2388 unsigned long long maxsize
;
2392 if (level
== LEVEL_CONTAINER
)
2395 if (level
== 1 && raiddisks
> 2) {
2397 fprintf(stderr
, Name
": imsm does not support more "
2398 "than 2 in a raid1 configuration\n");
2402 /* We must have the container info already read in. */
2407 /* General test: make sure there is space for
2408 * 'raiddisks' device extents of size 'size' at a given
2411 unsigned long long minsize
= size
*2 /* convert to blocks */;
2412 unsigned long long start_offset
= ~0ULL;
2415 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
2416 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2421 e
= get_extents(super
, dl
);
2424 unsigned long long esize
;
2425 esize
= e
[i
].start
- pos
;
2426 if (esize
>= minsize
)
2428 if (found
&& start_offset
== ~0ULL) {
2431 } else if (found
&& pos
!= start_offset
) {
2435 pos
= e
[i
].start
+ e
[i
].size
;
2437 } while (e
[i
-1].size
);
2442 if (dcnt
< raiddisks
) {
2444 fprintf(stderr
, Name
": imsm: Not enough "
2445 "devices with space for this array "
2453 /* This device must be a member of the set */
2454 if (stat(dev
, &stb
) < 0)
2456 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
2458 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2459 if (dl
->major
== major(stb
.st_rdev
) &&
2460 dl
->minor
== minor(stb
.st_rdev
))
2465 fprintf(stderr
, Name
": %s is not in the "
2466 "same imsm set\n", dev
);
2470 /* retrieve the largest free space block */
2471 e
= get_extents(super
, dl
);
2476 unsigned long long esize
;
2478 esize
= e
[i
].start
- pos
;
2479 if (esize
>= maxsize
)
2481 pos
= e
[i
].start
+ e
[i
].size
;
2483 } while (e
[i
-1].size
);
2488 fprintf(stderr
, Name
": unable to determine free space for: %s\n",
2492 if (maxsize
< size
) {
2494 fprintf(stderr
, Name
": %s not enough space (%llu < %llu)\n",
2495 dev
, maxsize
, size
);
2499 /* count total number of extents for merge */
2501 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2503 i
+= dl
->extent_cnt
;
2505 maxsize
= merge_extents(super
, i
);
2506 if (maxsize
< size
) {
2508 fprintf(stderr
, Name
": not enough space after merge (%llu < %llu)\n",
2511 } else if (maxsize
== ~0ULL) {
2513 fprintf(stderr
, Name
": failed to merge %d extents\n", i
);
2517 *freesize
= maxsize
;
2522 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
2523 int raiddisks
, int chunk
, unsigned long long size
,
2524 char *dev
, unsigned long long *freesize
,
2530 /* if given unused devices create a container
2531 * if given given devices in a container create a member volume
2533 if (level
== LEVEL_CONTAINER
) {
2534 /* Must be a fresh device to add to a container */
2535 return validate_geometry_imsm_container(st
, level
, layout
,
2536 raiddisks
, chunk
, size
,
2542 /* creating in a given container */
2543 return validate_geometry_imsm_volume(st
, level
, layout
,
2544 raiddisks
, chunk
, size
,
2545 dev
, freesize
, verbose
);
2548 /* limit creation to the following levels */
2560 /* This device needs to be a device in an 'imsm' container */
2561 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2565 Name
": Cannot create this array on device %s\n",
2570 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
2572 fprintf(stderr
, Name
": Cannot open %s: %s\n",
2573 dev
, strerror(errno
));
2576 /* Well, it is in use by someone, maybe an 'imsm' container. */
2577 cfd
= open_container(fd
);
2581 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
2585 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
2587 if (sra
&& sra
->array
.major_version
== -1 &&
2588 strcmp(sra
->text_version
, "imsm") == 0) {
2589 /* This is a member of a imsm container. Load the container
2590 * and try to create a volume
2592 struct intel_super
*super
;
2594 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, 1) == 0) {
2596 st
->container_dev
= fd2devnum(cfd
);
2598 return validate_geometry_imsm_volume(st
, level
, layout
,
2604 } else /* may belong to another container */
2609 #endif /* MDASSEMBLE */
2611 static struct mdinfo
*container_content_imsm(struct supertype
*st
)
2613 /* Given a container loaded by load_super_imsm_all,
2614 * extract information about all the arrays into
2617 * For each imsm_dev create an mdinfo, fill it in,
2618 * then look for matching devices in super->disks
2619 * and create appropriate device mdinfo.
2621 struct intel_super
*super
= st
->sb
;
2622 struct imsm_super
*mpb
= super
->anchor
;
2623 struct mdinfo
*rest
= NULL
;
2626 /* do not assemble arrays that might have bad blocks */
2627 if (imsm_bbm_log_size(super
->anchor
)) {
2628 fprintf(stderr
, Name
": BBM log found in metadata. "
2629 "Cannot activate array(s).\n");
2633 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2634 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
2635 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2636 struct mdinfo
*this;
2639 this = malloc(sizeof(*this));
2640 memset(this, 0, sizeof(*this));
2643 super
->current_vol
= i
;
2644 getinfo_super_imsm_volume(st
, this);
2645 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
2646 struct mdinfo
*info_d
;
2654 idx
= get_imsm_disk_idx(dev
, slot
);
2655 ord
= get_imsm_ord_tbl_ent(dev
, slot
);
2656 for (d
= super
->disks
; d
; d
= d
->next
)
2657 if (d
->index
== idx
)
2663 s
= d
? d
->disk
.status
: 0;
2664 if (s
& FAILED_DISK
)
2666 if (!(s
& USABLE_DISK
))
2668 if (ord
& IMSM_ORD_REBUILD
)
2672 * if we skip some disks the array will be assmebled degraded;
2673 * reset resync start to avoid a dirty-degraded situation
2675 * FIXME handle dirty degraded
2677 if (skip
&& !dev
->vol
.dirty
)
2678 this->resync_start
= ~0ULL;
2682 info_d
= malloc(sizeof(*info_d
));
2684 fprintf(stderr
, Name
": failed to allocate disk"
2685 " for volume %s\n", (char *) dev
->volume
);
2690 memset(info_d
, 0, sizeof(*info_d
));
2691 info_d
->next
= this->devs
;
2692 this->devs
= info_d
;
2694 info_d
->disk
.number
= d
->index
;
2695 info_d
->disk
.major
= d
->major
;
2696 info_d
->disk
.minor
= d
->minor
;
2697 info_d
->disk
.raid_disk
= slot
;
2699 this->array
.working_disks
++;
2701 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
2702 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
2703 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
2705 strcpy(info_d
->name
, d
->devname
);
2715 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
2718 struct intel_super
*super
= c
->sb
;
2719 struct imsm_super
*mpb
= super
->anchor
;
2721 if (atoi(inst
) >= mpb
->num_raid_devs
) {
2722 fprintf(stderr
, "%s: subarry index %d, out of range\n",
2723 __func__
, atoi(inst
));
2727 dprintf("imsm: open_new %s\n", inst
);
2728 a
->info
.container_member
= atoi(inst
);
2732 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
, int failed
)
2734 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2737 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
2738 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
2740 switch (get_imsm_raid_level(map
)) {
2742 return IMSM_T_STATE_FAILED
;
2745 if (failed
< map
->num_members
)
2746 return IMSM_T_STATE_DEGRADED
;
2748 return IMSM_T_STATE_FAILED
;
2753 * check to see if any mirrors have failed, otherwise we
2754 * are degraded. Even numbered slots are mirrored on
2758 /* gcc -Os complains that this is unused */
2759 int insync
= insync
;
2761 for (i
= 0; i
< map
->num_members
; i
++) {
2762 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
2763 int idx
= ord_to_idx(ord
);
2764 struct imsm_disk
*disk
;
2766 /* reset the potential in-sync count on even-numbered
2767 * slots. num_copies is always 2 for imsm raid10
2772 disk
= get_imsm_disk(super
, idx
);
2773 if (!disk
|| disk
->status
& FAILED_DISK
||
2774 ord
& IMSM_ORD_REBUILD
)
2777 /* no in-sync disks left in this mirror the
2781 return IMSM_T_STATE_FAILED
;
2784 return IMSM_T_STATE_DEGRADED
;
2788 return IMSM_T_STATE_DEGRADED
;
2790 return IMSM_T_STATE_FAILED
;
2796 return map
->map_state
;
2799 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
)
2803 struct imsm_disk
*disk
;
2804 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2806 for (i
= 0; i
< map
->num_members
; i
++) {
2807 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
);
2808 int idx
= ord_to_idx(ord
);
2810 disk
= get_imsm_disk(super
, idx
);
2811 if (!disk
|| disk
->status
& FAILED_DISK
||
2812 ord
& IMSM_ORD_REBUILD
)
2819 static int is_resyncing(struct imsm_dev
*dev
)
2821 struct imsm_map
*migr_map
;
2823 if (!dev
->vol
.migr_state
)
2826 if (dev
->vol
.migr_type
== MIGR_INIT
)
2829 migr_map
= get_imsm_map(dev
, 1);
2831 if (migr_map
->map_state
== IMSM_T_STATE_NORMAL
)
2837 static int is_rebuilding(struct imsm_dev
*dev
)
2839 struct imsm_map
*migr_map
;
2841 if (!dev
->vol
.migr_state
)
2844 if (dev
->vol
.migr_type
!= MIGR_REBUILD
)
2847 migr_map
= get_imsm_map(dev
, 1);
2849 if (migr_map
->map_state
== IMSM_T_STATE_DEGRADED
)
2855 static void mark_failure(struct imsm_disk
*disk
)
2857 if (disk
->status
& FAILED_DISK
)
2859 disk
->status
|= FAILED_DISK
;
2860 disk
->scsi_id
= __cpu_to_le32(~(__u32
)0);
2861 memmove(&disk
->serial
[0], &disk
->serial
[1], MAX_RAID_SERIAL_LEN
- 1);
2864 /* Handle dirty -> clean transititions and resync. Degraded and rebuild
2865 * states are handled in imsm_set_disk() with one exception, when a
2866 * resync is stopped due to a new failure this routine will set the
2867 * 'degraded' state for the array.
2869 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
2871 int inst
= a
->info
.container_member
;
2872 struct intel_super
*super
= a
->container
->sb
;
2873 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2874 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2875 int failed
= imsm_count_failed(super
, dev
);
2876 __u8 map_state
= imsm_check_degraded(super
, dev
, failed
);
2878 /* before we activate this array handle any missing disks */
2879 if (consistent
== 2 && super
->missing
) {
2882 dprintf("imsm: mark missing\n");
2883 end_migration(dev
, map_state
);
2884 for (dl
= super
->missing
; dl
; dl
= dl
->next
)
2885 mark_failure(&dl
->disk
);
2886 super
->updates_pending
++;
2889 if (consistent
== 2 &&
2890 (!is_resync_complete(a
) ||
2891 map_state
!= IMSM_T_STATE_NORMAL
||
2892 dev
->vol
.migr_state
))
2895 if (is_resync_complete(a
)) {
2896 /* complete intialization / resync,
2897 * recovery is completed in ->set_disk
2899 if (is_resyncing(dev
)) {
2900 dprintf("imsm: mark resync done\n");
2901 end_migration(dev
, map_state
);
2902 super
->updates_pending
++;
2904 } else if (!is_resyncing(dev
) && !failed
) {
2905 /* mark the start of the init process if nothing is failed */
2906 dprintf("imsm: mark resync start (%llu)\n", a
->resync_start
);
2907 if (map
->map_state
== IMSM_T_STATE_NORMAL
)
2908 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_REBUILD
);
2910 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_INIT
);
2911 super
->updates_pending
++;
2914 /* check if we can update the migration checkpoint */
2915 if (dev
->vol
.migr_state
&&
2916 __le32_to_cpu(dev
->vol
.curr_migr_unit
) != a
->resync_start
) {
2917 dprintf("imsm: checkpoint migration (%llu)\n", a
->resync_start
);
2918 dev
->vol
.curr_migr_unit
= __cpu_to_le32(a
->resync_start
);
2919 super
->updates_pending
++;
2922 /* mark dirty / clean */
2923 if (dev
->vol
.dirty
!= !consistent
) {
2924 dprintf("imsm: mark '%s' (%llu)\n",
2925 consistent
? "clean" : "dirty", a
->resync_start
);
2930 super
->updates_pending
++;
2935 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
2937 int inst
= a
->info
.container_member
;
2938 struct intel_super
*super
= a
->container
->sb
;
2939 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
2940 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2941 struct imsm_disk
*disk
;
2946 if (n
> map
->num_members
)
2947 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
2948 n
, map
->num_members
- 1);
2953 dprintf("imsm: set_disk %d:%x\n", n
, state
);
2955 ord
= get_imsm_ord_tbl_ent(dev
, n
);
2956 disk
= get_imsm_disk(super
, ord_to_idx(ord
));
2958 /* check for new failures */
2959 if ((state
& DS_FAULTY
) && !(disk
->status
& FAILED_DISK
)) {
2961 super
->updates_pending
++;
2964 /* check if in_sync */
2965 if (state
& DS_INSYNC
&& ord
& IMSM_ORD_REBUILD
) {
2966 struct imsm_map
*migr_map
= get_imsm_map(dev
, 1);
2968 set_imsm_ord_tbl_ent(migr_map
, n
, ord_to_idx(ord
));
2969 super
->updates_pending
++;
2972 failed
= imsm_count_failed(super
, dev
);
2973 map_state
= imsm_check_degraded(super
, dev
, failed
);
2975 /* check if recovery complete, newly degraded, or failed */
2976 if (map_state
== IMSM_T_STATE_NORMAL
&& is_rebuilding(dev
)) {
2977 end_migration(dev
, map_state
);
2978 super
->updates_pending
++;
2979 } else if (map_state
== IMSM_T_STATE_DEGRADED
&&
2980 map
->map_state
!= map_state
&&
2981 !dev
->vol
.migr_state
) {
2982 dprintf("imsm: mark degraded\n");
2983 map
->map_state
= map_state
;
2984 super
->updates_pending
++;
2985 } else if (map_state
== IMSM_T_STATE_FAILED
&&
2986 map
->map_state
!= map_state
) {
2987 dprintf("imsm: mark failed\n");
2988 end_migration(dev
, map_state
);
2989 super
->updates_pending
++;
2993 static int store_imsm_mpb(int fd
, struct intel_super
*super
)
2995 struct imsm_super
*mpb
= super
->anchor
;
2996 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
2997 unsigned long long dsize
;
2998 unsigned long long sectors
;
3000 get_dev_size(fd
, NULL
, &dsize
);
3002 if (mpb_size
> 512) {
3003 /* -1 to account for anchor */
3004 sectors
= mpb_sectors(mpb
) - 1;
3006 /* write the extended mpb to the sectors preceeding the anchor */
3007 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
3010 if (write(fd
, super
->buf
+ 512, 512 * sectors
) != 512 * sectors
)
3014 /* first block is stored on second to last sector of the disk */
3015 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
3018 if (write(fd
, super
->buf
, 512) != 512)
3024 static void imsm_sync_metadata(struct supertype
*container
)
3026 struct intel_super
*super
= container
->sb
;
3028 if (!super
->updates_pending
)
3031 write_super_imsm(super
, 0);
3033 super
->updates_pending
= 0;
3036 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
3038 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
3039 int i
= get_imsm_disk_idx(dev
, idx
);
3042 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3046 if (dl
&& dl
->disk
.status
& FAILED_DISK
)
3050 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
3055 static struct dl
*imsm_add_spare(struct intel_super
*super
, int slot
, struct active_array
*a
)
3057 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
3058 int idx
= get_imsm_disk_idx(dev
, slot
);
3059 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3060 unsigned long long esize
;
3061 unsigned long long pos
;
3069 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
3070 /* If in this array, skip */
3071 for (d
= a
->info
.devs
; d
; d
= d
->next
)
3072 if (d
->state_fd
>= 0 &&
3073 d
->disk
.major
== dl
->major
&&
3074 d
->disk
.minor
== dl
->minor
) {
3075 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
3081 /* skip in use or failed drives */
3082 if (dl
->disk
.status
& FAILED_DISK
|| idx
== dl
->index
) {
3083 dprintf("%x:%x status ( %s%s)\n",
3084 dl
->major
, dl
->minor
,
3085 dl
->disk
.status
& FAILED_DISK
? "failed " : "",
3086 idx
== dl
->index
? "in use " : "");
3090 /* Does this unused device have the requisite free space?
3091 * We need a->info.component_size sectors
3093 ex
= get_extents(super
, dl
);
3095 dprintf("cannot get extents\n");
3101 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
3104 /* check that we can start at pba_of_lba0 with
3105 * a->info.component_size of space
3107 esize
= ex
[j
].start
- pos
;
3108 if (array_start
>= pos
&&
3109 array_start
+ a
->info
.component_size
< ex
[j
].start
) {
3113 pos
= ex
[j
].start
+ ex
[j
].size
;
3116 } while (ex
[j
-1].size
);
3120 dprintf("%x:%x does not have %llu at %d\n",
3121 dl
->major
, dl
->minor
,
3122 a
->info
.component_size
,
3123 __le32_to_cpu(map
->pba_of_lba0
));
3133 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
3134 struct metadata_update
**updates
)
3137 * Find a device with unused free space and use it to replace a
3138 * failed/vacant region in an array. We replace failed regions one a
3139 * array at a time. The result is that a new spare disk will be added
3140 * to the first failed array and after the monitor has finished
3141 * propagating failures the remainder will be consumed.
3143 * FIXME add a capability for mdmon to request spares from another
3147 struct intel_super
*super
= a
->container
->sb
;
3148 int inst
= a
->info
.container_member
;
3149 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
3150 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3151 int failed
= a
->info
.array
.raid_disks
;
3152 struct mdinfo
*rv
= NULL
;
3155 struct metadata_update
*mu
;
3157 struct imsm_update_activate_spare
*u
;
3161 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
3162 if ((d
->curr_state
& DS_FAULTY
) &&
3164 /* wait for Removal to happen */
3166 if (d
->state_fd
>= 0)
3170 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
3171 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
3172 if (imsm_check_degraded(super
, dev
, failed
) != IMSM_T_STATE_DEGRADED
)
3175 /* For each slot, if it is not working, find a spare */
3176 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
3177 for (d
= a
->info
.devs
; d
; d
= d
->next
)
3178 if (d
->disk
.raid_disk
== i
)
3180 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
3181 if (d
&& (d
->state_fd
>= 0))
3185 * OK, this device needs recovery. Try to re-add the previous
3186 * occupant of this slot, if this fails add a new spare
3188 dl
= imsm_readd(super
, i
, a
);
3190 dl
= imsm_add_spare(super
, i
, a
);
3194 /* found a usable disk with enough space */
3195 di
= malloc(sizeof(*di
));
3198 memset(di
, 0, sizeof(*di
));
3200 /* dl->index will be -1 in the case we are activating a
3201 * pristine spare. imsm_process_update() will create a
3202 * new index in this case. Once a disk is found to be
3203 * failed in all member arrays it is kicked from the
3206 di
->disk
.number
= dl
->index
;
3208 /* (ab)use di->devs to store a pointer to the device
3211 di
->devs
= (struct mdinfo
*) dl
;
3213 di
->disk
.raid_disk
= i
;
3214 di
->disk
.major
= dl
->major
;
3215 di
->disk
.minor
= dl
->minor
;
3217 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
3218 di
->component_size
= a
->info
.component_size
;
3219 di
->container_member
= inst
;
3223 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
3224 i
, di
->data_offset
);
3230 /* No spares found */
3232 /* Now 'rv' has a list of devices to return.
3233 * Create a metadata_update record to update the
3234 * disk_ord_tbl for the array
3236 mu
= malloc(sizeof(*mu
));
3238 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
3239 if (mu
->buf
== NULL
) {
3246 struct mdinfo
*n
= rv
->next
;
3255 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
3256 mu
->next
= *updates
;
3257 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
3259 for (di
= rv
; di
; di
= di
->next
) {
3260 u
->type
= update_activate_spare
;
3261 u
->dl
= (struct dl
*) di
->devs
;
3263 u
->slot
= di
->disk
.raid_disk
;
3274 static int disks_overlap(struct imsm_dev
*d1
, struct imsm_dev
*d2
)
3276 struct imsm_map
*m1
= get_imsm_map(d1
, 0);
3277 struct imsm_map
*m2
= get_imsm_map(d2
, 0);
3282 for (i
= 0; i
< m1
->num_members
; i
++) {
3283 idx
= get_imsm_disk_idx(d1
, i
);
3284 for (j
= 0; j
< m2
->num_members
; j
++)
3285 if (idx
== get_imsm_disk_idx(d2
, j
))
3292 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
);
3294 static void imsm_process_update(struct supertype
*st
,
3295 struct metadata_update
*update
)
3298 * crack open the metadata_update envelope to find the update record
3299 * update can be one of:
3300 * update_activate_spare - a spare device has replaced a failed
3301 * device in an array, update the disk_ord_tbl. If this disk is
3302 * present in all member arrays then also clear the SPARE_DISK
3305 struct intel_super
*super
= st
->sb
;
3306 struct imsm_super
*mpb
;
3307 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
3309 /* update requires a larger buf but the allocation failed */
3310 if (super
->next_len
&& !super
->next_buf
) {
3311 super
->next_len
= 0;
3315 if (super
->next_buf
) {
3316 memcpy(super
->next_buf
, super
->buf
, super
->len
);
3318 super
->len
= super
->next_len
;
3319 super
->buf
= super
->next_buf
;
3321 super
->next_len
= 0;
3322 super
->next_buf
= NULL
;
3325 mpb
= super
->anchor
;
3328 case update_activate_spare
: {
3329 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
3330 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
3331 struct imsm_map
*map
= get_imsm_map(dev
, 0);
3332 struct imsm_map
*migr_map
;
3333 struct active_array
*a
;
3334 struct imsm_disk
*disk
;
3339 int victim
= get_imsm_disk_idx(dev
, u
->slot
);
3342 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3347 fprintf(stderr
, "error: imsm_activate_spare passed "
3348 "an unknown disk (index: %d)\n",
3353 super
->updates_pending
++;
3355 /* count failures (excluding rebuilds and the victim)
3356 * to determine map[0] state
3359 for (i
= 0; i
< map
->num_members
; i
++) {
3362 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
3363 if (!disk
|| disk
->status
& FAILED_DISK
)
3367 /* adding a pristine spare, assign a new index */
3368 if (dl
->index
< 0) {
3369 dl
->index
= super
->anchor
->num_disks
;
3370 super
->anchor
->num_disks
++;
3373 disk
->status
|= CONFIGURED_DISK
;
3374 disk
->status
&= ~SPARE_DISK
;
3377 to_state
= imsm_check_degraded(super
, dev
, failed
);
3378 map
->map_state
= IMSM_T_STATE_DEGRADED
;
3379 migrate(dev
, to_state
, MIGR_REBUILD
);
3380 migr_map
= get_imsm_map(dev
, 1);
3381 set_imsm_ord_tbl_ent(map
, u
->slot
, dl
->index
);
3382 set_imsm_ord_tbl_ent(migr_map
, u
->slot
, dl
->index
| IMSM_ORD_REBUILD
);
3384 /* count arrays using the victim in the metadata */
3386 for (a
= st
->arrays
; a
; a
= a
->next
) {
3387 dev
= get_imsm_dev(super
, a
->info
.container_member
);
3388 for (i
= 0; i
< map
->num_members
; i
++)
3389 if (victim
== get_imsm_disk_idx(dev
, i
))
3393 /* delete the victim if it is no longer being
3399 /* We know that 'manager' isn't touching anything,
3400 * so it is safe to delete
3402 for (dlp
= &super
->disks
; *dlp
; dlp
= &(*dlp
)->next
)
3403 if ((*dlp
)->index
== victim
)
3406 /* victim may be on the missing list */
3408 for (dlp
= &super
->missing
; *dlp
; dlp
= &(*dlp
)->next
)
3409 if ((*dlp
)->index
== victim
)
3411 imsm_delete(super
, dlp
, victim
);
3415 case update_create_array
: {
3416 /* someone wants to create a new array, we need to be aware of
3417 * a few races/collisions:
3418 * 1/ 'Create' called by two separate instances of mdadm
3419 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
3420 * devices that have since been assimilated via
3422 * In the event this update can not be carried out mdadm will
3423 * (FIX ME) notice that its update did not take hold.
3425 struct imsm_update_create_array
*u
= (void *) update
->buf
;
3426 struct imsm_dev
*dev
;
3427 struct imsm_map
*map
, *new_map
;
3428 unsigned long long start
, end
;
3429 unsigned long long new_start
, new_end
;
3433 /* handle racing creates: first come first serve */
3434 if (u
->dev_idx
< mpb
->num_raid_devs
) {
3435 dprintf("%s: subarray %d already defined\n",
3436 __func__
, u
->dev_idx
);
3440 /* check update is next in sequence */
3441 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
3442 dprintf("%s: can not create array %d expected index %d\n",
3443 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
3447 new_map
= get_imsm_map(&u
->dev
, 0);
3448 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
3449 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
3451 /* handle activate_spare versus create race:
3452 * check to make sure that overlapping arrays do not include
3455 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3456 dev
= get_imsm_dev(super
, i
);
3457 map
= get_imsm_map(dev
, 0);
3458 start
= __le32_to_cpu(map
->pba_of_lba0
);
3459 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
3460 if ((new_start
>= start
&& new_start
<= end
) ||
3461 (start
>= new_start
&& start
<= new_end
))
3463 if (overlap
&& disks_overlap(dev
, &u
->dev
)) {
3464 dprintf("%s: arrays overlap\n", __func__
);
3468 /* check num_members sanity */
3469 if (new_map
->num_members
> mpb
->num_disks
) {
3470 dprintf("%s: num_disks out of range\n", __func__
);
3474 /* check that prepare update was successful */
3475 if (!update
->space
) {
3476 dprintf("%s: prepare update failed\n", __func__
);
3480 super
->updates_pending
++;
3481 dev
= update
->space
;
3482 map
= get_imsm_map(dev
, 0);
3483 update
->space
= NULL
;
3484 imsm_copy_dev(dev
, &u
->dev
);
3485 map
= get_imsm_map(dev
, 0);
3486 super
->dev_tbl
[u
->dev_idx
] = dev
;
3487 mpb
->num_raid_devs
++;
3490 for (i
= 0; i
< map
->num_members
; i
++) {
3491 struct imsm_disk
*disk
;
3493 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
));
3494 disk
->status
|= CONFIGURED_DISK
;
3495 disk
->status
&= ~SPARE_DISK
;
3498 imsm_update_version_info(super
);
3502 case update_add_disk
:
3504 /* we may be able to repair some arrays if disks are
3507 struct active_array
*a
;
3509 super
->updates_pending
++;
3510 for (a
= st
->arrays
; a
; a
= a
->next
)
3511 a
->check_degraded
= 1;
3513 /* add some spares to the metadata */
3514 while (super
->add
) {
3518 super
->add
= al
->next
;
3519 al
->next
= super
->disks
;
3521 dprintf("%s: added %x:%x\n",
3522 __func__
, al
->major
, al
->minor
);
3529 static void imsm_prepare_update(struct supertype
*st
,
3530 struct metadata_update
*update
)
3533 * Allocate space to hold new disk entries, raid-device entries or a new
3534 * mpb if necessary. The manager synchronously waits for updates to
3535 * complete in the monitor, so new mpb buffers allocated here can be
3536 * integrated by the monitor thread without worrying about live pointers
3537 * in the manager thread.
3539 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
3540 struct intel_super
*super
= st
->sb
;
3541 struct imsm_super
*mpb
= super
->anchor
;
3546 case update_create_array
: {
3547 struct imsm_update_create_array
*u
= (void *) update
->buf
;
3549 len
= sizeof_imsm_dev(&u
->dev
, 1);
3550 update
->space
= malloc(len
);
3557 /* check if we need a larger metadata buffer */
3558 if (super
->next_buf
)
3559 buf_len
= super
->next_len
;
3561 buf_len
= super
->len
;
3563 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
3564 /* ok we need a larger buf than what is currently allocated
3565 * if this allocation fails process_update will notice that
3566 * ->next_len is set and ->next_buf is NULL
3568 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
3569 if (super
->next_buf
)
3570 free(super
->next_buf
);
3572 super
->next_len
= buf_len
;
3573 if (posix_memalign(&super
->next_buf
, buf_len
, 512) != 0)
3574 super
->next_buf
= NULL
;
3578 /* must be called while manager is quiesced */
3579 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, int index
)
3581 struct imsm_super
*mpb
= super
->anchor
;
3583 struct imsm_dev
*dev
;
3584 struct imsm_map
*map
;
3585 int i
, j
, num_members
;
3588 dprintf("%s: deleting device[%d] from imsm_super\n",
3591 /* shift all indexes down one */
3592 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
3593 if (iter
->index
> index
)
3595 for (iter
= super
->missing
; iter
; iter
= iter
->next
)
3596 if (iter
->index
> index
)
3599 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3600 dev
= get_imsm_dev(super
, i
);
3601 map
= get_imsm_map(dev
, 0);
3602 num_members
= map
->num_members
;
3603 for (j
= 0; j
< num_members
; j
++) {
3604 /* update ord entries being careful not to propagate
3605 * ord-flags to the first map
3607 ord
= get_imsm_ord_tbl_ent(dev
, j
);
3609 if (ord_to_idx(ord
) <= index
)
3612 map
= get_imsm_map(dev
, 0);
3613 set_imsm_ord_tbl_ent(map
, j
, ord_to_idx(ord
- 1));
3614 map
= get_imsm_map(dev
, 1);
3616 set_imsm_ord_tbl_ent(map
, j
, ord
- 1);
3621 super
->updates_pending
++;
3623 struct dl
*dl
= *dlp
;
3625 *dlp
= (*dlp
)->next
;
3626 __free_imsm_disk(dl
);
3629 #endif /* MDASSEMBLE */
3631 struct superswitch super_imsm
= {
3633 .examine_super
= examine_super_imsm
,
3634 .brief_examine_super
= brief_examine_super_imsm
,
3635 .detail_super
= detail_super_imsm
,
3636 .brief_detail_super
= brief_detail_super_imsm
,
3637 .write_init_super
= write_init_super_imsm
,
3638 .validate_geometry
= validate_geometry_imsm
,
3639 .add_to_super
= add_to_super_imsm
,
3641 .match_home
= match_home_imsm
,
3642 .uuid_from_super
= uuid_from_super_imsm
,
3643 .getinfo_super
= getinfo_super_imsm
,
3644 .update_super
= update_super_imsm
,
3646 .avail_size
= avail_size_imsm
,
3648 .compare_super
= compare_super_imsm
,
3650 .load_super
= load_super_imsm
,
3651 .init_super
= init_super_imsm
,
3652 .store_super
= store_zero_imsm
,
3653 .free_super
= free_super_imsm
,
3654 .match_metadata_desc
= match_metadata_desc_imsm
,
3655 .container_content
= container_content_imsm
,
3661 .open_new
= imsm_open_new
,
3662 .load_super
= load_super_imsm
,
3663 .set_array_state
= imsm_set_array_state
,
3664 .set_disk
= imsm_set_disk
,
3665 .sync_metadata
= imsm_sync_metadata
,
3666 .activate_spare
= imsm_activate_spare
,
3667 .process_update
= imsm_process_update
,
3668 .prepare_update
= imsm_prepare_update
,
3669 #endif /* MDASSEMBLE */