2 * mdadm - Intel(R) Matrix Storage Manager Support
4 * Copyright (C) 2002-2008 Intel Corporation
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
20 #define HAVE_STDINT_H 1
24 #include "platform-intel.h"
30 /* MPB == Metadata Parameter Block */
31 #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
32 #define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
33 #define MPB_VERSION_RAID0 "1.0.00"
34 #define MPB_VERSION_RAID1 "1.1.00"
35 #define MPB_VERSION_MANY_VOLUMES_PER_ARRAY "1.2.00"
36 #define MPB_VERSION_3OR4_DISK_ARRAY "1.2.01"
37 #define MPB_VERSION_RAID5 "1.2.02"
38 #define MPB_VERSION_5OR6_DISK_ARRAY "1.2.04"
39 #define MPB_VERSION_CNG "1.2.06"
40 #define MPB_VERSION_ATTRIBS "1.3.00"
41 #define MAX_SIGNATURE_LENGTH 32
42 #define MAX_RAID_SERIAL_LEN 16
44 #define MPB_ATTRIB_CHECKSUM_VERIFY __cpu_to_le32(0x80000000)
45 #define MPB_ATTRIB_PM __cpu_to_le32(0x40000000)
46 #define MPB_ATTRIB_2TB __cpu_to_le32(0x20000000)
47 #define MPB_ATTRIB_RAID0 __cpu_to_le32(0x00000001)
48 #define MPB_ATTRIB_RAID1 __cpu_to_le32(0x00000002)
49 #define MPB_ATTRIB_RAID10 __cpu_to_le32(0x00000004)
50 #define MPB_ATTRIB_RAID1E __cpu_to_le32(0x00000008)
51 #define MPB_ATTRIB_RAID5 __cpu_to_le32(0x00000010)
52 #define MPB_ATTRIB_RAIDCNG __cpu_to_le32(0x00000020)
54 #define MPB_SECTOR_CNT 418
55 #define IMSM_RESERVED_SECTORS 4096
56 #define SECT_PER_MB_SHIFT 11
58 /* Disk configuration info. */
59 #define IMSM_MAX_DEVICES 255
61 __u8 serial
[MAX_RAID_SERIAL_LEN
];/* 0xD8 - 0xE7 ascii serial number */
62 __u32 total_blocks
; /* 0xE8 - 0xEB total blocks */
63 __u32 scsi_id
; /* 0xEC - 0xEF scsi ID */
64 #define SPARE_DISK __cpu_to_le32(0x01) /* Spare */
65 #define CONFIGURED_DISK __cpu_to_le32(0x02) /* Member of some RaidDev */
66 #define FAILED_DISK __cpu_to_le32(0x04) /* Permanent failure */
67 __u32 status
; /* 0xF0 - 0xF3 */
68 __u32 owner_cfg_num
; /* which config 0,1,2... owns this disk */
69 #define IMSM_DISK_FILLERS 4
70 __u32 filler
[IMSM_DISK_FILLERS
]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
73 /* RAID map configuration infos. */
75 __u32 pba_of_lba0
; /* start address of partition */
76 __u32 blocks_per_member
;/* blocks per member */
77 __u32 num_data_stripes
; /* number of data stripes */
78 __u16 blocks_per_strip
;
79 __u8 map_state
; /* Normal, Uninitialized, Degraded, Failed */
80 #define IMSM_T_STATE_NORMAL 0
81 #define IMSM_T_STATE_UNINITIALIZED 1
82 #define IMSM_T_STATE_DEGRADED 2
83 #define IMSM_T_STATE_FAILED 3
85 #define IMSM_T_RAID0 0
86 #define IMSM_T_RAID1 1
87 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
88 __u8 num_members
; /* number of member disks */
89 __u8 num_domains
; /* number of parity domains */
90 __u8 failed_disk_num
; /* valid only when state is degraded */
92 __u32 filler
[7]; /* expansion area */
93 #define IMSM_ORD_REBUILD (1 << 24)
94 __u32 disk_ord_tbl
[1]; /* disk_ord_tbl[num_members],
95 * top byte contains some flags
97 } __attribute__ ((packed
));
100 __u32 curr_migr_unit
;
101 __u32 checkpoint_id
; /* id to access curr_migr_unit */
102 __u8 migr_state
; /* Normal or Migrating */
104 #define MIGR_REBUILD 1
105 #define MIGR_VERIFY 2 /* analagous to echo check > sync_action */
106 #define MIGR_GEN_MIGR 3
107 #define MIGR_STATE_CHANGE 4
108 #define MIGR_REPAIR 5
109 __u8 migr_type
; /* Initializing, Rebuilding, ... */
111 __u8 fs_state
; /* fast-sync state for CnG (0xff == disabled) */
112 __u16 verify_errors
; /* number of mismatches */
113 __u16 bad_blocks
; /* number of bad blocks during verify */
115 struct imsm_map map
[1];
116 /* here comes another one if migr_state */
117 } __attribute__ ((packed
));
120 __u8 volume
[MAX_RAID_SERIAL_LEN
];
123 #define DEV_BOOTABLE __cpu_to_le32(0x01)
124 #define DEV_BOOT_DEVICE __cpu_to_le32(0x02)
125 #define DEV_READ_COALESCING __cpu_to_le32(0x04)
126 #define DEV_WRITE_COALESCING __cpu_to_le32(0x08)
127 #define DEV_LAST_SHUTDOWN_DIRTY __cpu_to_le32(0x10)
128 #define DEV_HIDDEN_AT_BOOT __cpu_to_le32(0x20)
129 #define DEV_CURRENTLY_HIDDEN __cpu_to_le32(0x40)
130 #define DEV_VERIFY_AND_FIX __cpu_to_le32(0x80)
131 #define DEV_MAP_STATE_UNINIT __cpu_to_le32(0x100)
132 #define DEV_NO_AUTO_RECOVERY __cpu_to_le32(0x200)
133 #define DEV_CLONE_N_GO __cpu_to_le32(0x400)
134 #define DEV_CLONE_MAN_SYNC __cpu_to_le32(0x800)
135 #define DEV_CNG_MASTER_DISK_NUM __cpu_to_le32(0x1000)
136 __u32 status
; /* Persistent RaidDev status */
137 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
141 __u8 cng_master_disk
;
145 #define IMSM_DEV_FILLERS 10
146 __u32 filler
[IMSM_DEV_FILLERS
];
148 } __attribute__ ((packed
));
151 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
152 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
153 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
154 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
155 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
156 __u32 error_log_size
; /* 0x30 - 0x33 in bytes */
157 __u32 attributes
; /* 0x34 - 0x37 */
158 __u8 num_disks
; /* 0x38 Number of configured disks */
159 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
160 __u8 error_log_pos
; /* 0x3A */
161 __u8 fill
[1]; /* 0x3B */
162 __u32 cache_size
; /* 0x3c - 0x40 in mb */
163 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
164 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
165 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
166 #define IMSM_FILLERS 35
167 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
168 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
169 /* here comes imsm_dev[num_raid_devs] */
170 /* here comes BBM logs */
171 } __attribute__ ((packed
));
173 #define BBM_LOG_MAX_ENTRIES 254
175 struct bbm_log_entry
{
176 __u64 defective_block_start
;
177 #define UNREADABLE 0xFFFFFFFF
178 __u32 spare_block_offset
;
179 __u16 remapped_marked_count
;
181 } __attribute__ ((__packed__
));
184 __u32 signature
; /* 0xABADB10C */
186 __u32 reserved_spare_block_count
; /* 0 */
187 __u32 reserved
; /* 0xFFFF */
188 __u64 first_spare_lba
;
189 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
190 } __attribute__ ((__packed__
));
194 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
197 static __u8
migr_type(struct imsm_dev
*dev
)
199 if (dev
->vol
.migr_type
== MIGR_VERIFY
&&
200 dev
->status
& DEV_VERIFY_AND_FIX
)
203 return dev
->vol
.migr_type
;
206 static void set_migr_type(struct imsm_dev
*dev
, __u8 migr_type
)
208 /* for compatibility with older oroms convert MIGR_REPAIR, into
209 * MIGR_VERIFY w/ DEV_VERIFY_AND_FIX status
211 if (migr_type
== MIGR_REPAIR
) {
212 dev
->vol
.migr_type
= MIGR_VERIFY
;
213 dev
->status
|= DEV_VERIFY_AND_FIX
;
215 dev
->vol
.migr_type
= migr_type
;
216 dev
->status
&= ~DEV_VERIFY_AND_FIX
;
220 static unsigned int sector_count(__u32 bytes
)
222 return ((bytes
+ (512-1)) & (~(512-1))) / 512;
225 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
227 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
231 struct imsm_dev
*dev
;
232 struct intel_dev
*next
;
237 enum sys_dev_type type
;
240 struct intel_hba
*next
;
247 /* internal representation of IMSM metadata */
250 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
251 struct imsm_super
*anchor
; /* immovable parameters */
253 size_t len
; /* size of the 'buf' allocation */
254 void *next_buf
; /* for realloc'ing buf from the manager */
256 int updates_pending
; /* count of pending updates for mdmon */
257 int current_vol
; /* index of raid device undergoing creation */
258 __u32 create_offset
; /* common start for 'current_vol' */
259 __u32 random
; /* random data for seeding new family numbers */
260 struct intel_dev
*devlist
;
264 __u8 serial
[MAX_RAID_SERIAL_LEN
];
267 struct imsm_disk disk
;
270 struct extent
*e
; /* for determining freespace @ create */
271 int raiddisk
; /* slot to fill in autolayout */
274 struct dl
*disk_mgmt_list
; /* list of disks to add/remove while mdmon
276 struct dl
*missing
; /* disks removed while we weren't looking */
277 struct bbm_log
*bbm_log
;
278 struct intel_hba
*hba
; /* device path of the raid controller for this metadata */
279 const struct imsm_orom
*orom
; /* platform firmware support */
280 struct intel_super
*next
; /* (temp) list for disambiguating family_num */
284 struct imsm_disk disk
;
285 #define IMSM_UNKNOWN_OWNER (-1)
287 struct intel_disk
*next
;
291 unsigned long long start
, size
;
294 /* definitions of reshape process types */
295 enum imsm_reshape_type
{
300 /* definition of messages passed to imsm_process_update */
301 enum imsm_update_type
{
302 update_activate_spare
,
306 update_add_remove_disk
,
307 update_reshape_container_disks
,
311 struct imsm_update_activate_spare
{
312 enum imsm_update_type type
;
316 struct imsm_update_activate_spare
*next
;
329 enum takeover_direction
{
333 struct imsm_update_takeover
{
334 enum imsm_update_type type
;
336 enum takeover_direction direction
;
339 struct imsm_update_reshape
{
340 enum imsm_update_type type
;
343 int new_disks
[1]; /* new_raid_disks - old_raid_disks makedev number */
347 __u8 serial
[MAX_RAID_SERIAL_LEN
];
350 struct imsm_update_create_array
{
351 enum imsm_update_type type
;
356 struct imsm_update_kill_array
{
357 enum imsm_update_type type
;
361 struct imsm_update_rename_array
{
362 enum imsm_update_type type
;
363 __u8 name
[MAX_RAID_SERIAL_LEN
];
367 struct imsm_update_add_remove_disk
{
368 enum imsm_update_type type
;
372 static const char *_sys_dev_type
[] = {
373 [SYS_DEV_UNKNOWN
] = "Unknown",
374 [SYS_DEV_SAS
] = "SAS",
375 [SYS_DEV_SATA
] = "SATA"
378 const char *get_sys_dev_type(enum sys_dev_type type
)
380 if (type
>= SYS_DEV_MAX
)
381 type
= SYS_DEV_UNKNOWN
;
383 return _sys_dev_type
[type
];
386 static struct intel_hba
* alloc_intel_hba(struct sys_dev
*device
)
388 struct intel_hba
*result
= malloc(sizeof(*result
));
390 result
->type
= device
->type
;
391 result
->path
= strdup(device
->path
);
393 if (result
->path
&& (result
->pci_id
= strrchr(result
->path
, '/')) != NULL
)
399 static struct intel_hba
* find_intel_hba(struct intel_hba
*hba
, struct sys_dev
*device
)
401 struct intel_hba
*result
=NULL
;
402 for (result
= hba
; result
; result
= result
->next
) {
403 if (result
->type
== device
->type
&& strcmp(result
->path
, device
->path
) == 0)
409 static int attach_hba_to_super(struct intel_super
*super
, struct sys_dev
*device
)
411 struct intel_hba
*hba
;
413 /* check if disk attached to Intel HBA */
414 hba
= find_intel_hba(super
->hba
, device
);
417 /* Check if HBA is already attached to super */
418 if (super
->hba
== NULL
) {
419 super
->hba
= alloc_intel_hba(device
);
424 /* Intel metadata allows for all disks attached to the same type HBA.
425 * Do not sypport odf HBA types mixing
427 if (device
->type
!= hba
->type
)
433 hba
->next
= alloc_intel_hba(device
);
437 static struct sys_dev
* find_disk_attached_hba(int fd
, const char *devname
)
439 struct sys_dev
*list
, *elem
, *prev
;
442 if ((list
= find_intel_devices()) == NULL
)
446 disk_path
= (char *) devname
;
448 disk_path
= diskfd_to_devpath(fd
);
455 for (prev
= NULL
, elem
= list
; elem
; prev
= elem
, elem
= elem
->next
) {
456 if (path_attached_to_hba(disk_path
, elem
->path
)) {
460 prev
->next
= elem
->next
;
462 if (disk_path
!= devname
)
468 if (disk_path
!= devname
)
476 static int find_intel_hba_capability(int fd
, struct intel_super
*super
,
479 static struct supertype
*match_metadata_desc_imsm(char *arg
)
481 struct supertype
*st
;
483 if (strcmp(arg
, "imsm") != 0 &&
484 strcmp(arg
, "default") != 0
488 st
= malloc(sizeof(*st
));
491 memset(st
, 0, sizeof(*st
));
492 st
->container_dev
= NoMdDev
;
493 st
->ss
= &super_imsm
;
494 st
->max_devs
= IMSM_MAX_DEVICES
;
495 st
->minor_version
= 0;
501 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
503 return &mpb
->sig
[MPB_SIG_LEN
];
507 /* retrieve a disk directly from the anchor when the anchor is known to be
508 * up-to-date, currently only at load time
510 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
512 if (index
>= mpb
->num_disks
)
514 return &mpb
->disk
[index
];
517 /* retrieve the disk description based on a index of the disk
520 static struct dl
*get_imsm_dl_disk(struct intel_super
*super
, __u8 index
)
524 for (d
= super
->disks
; d
; d
= d
->next
)
525 if (d
->index
== index
)
530 /* retrieve a disk from the parsed metadata */
531 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
535 dl
= get_imsm_dl_disk(super
, index
);
542 /* generate a checksum directly from the anchor when the anchor is known to be
543 * up-to-date, currently only at load or write_super after coalescing
545 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
547 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
548 __u32
*p
= (__u32
*) mpb
;
552 sum
+= __le32_to_cpu(*p
);
556 return sum
- __le32_to_cpu(mpb
->check_sum
);
559 static size_t sizeof_imsm_map(struct imsm_map
*map
)
561 return sizeof(struct imsm_map
) + sizeof(__u32
) * (map
->num_members
- 1);
564 struct imsm_map
*get_imsm_map(struct imsm_dev
*dev
, int second_map
)
566 /* A device can have 2 maps if it is in the middle of a migration.
568 * 0 - we return the first map
569 * 1 - we return the second map if it exists, else NULL
570 * -1 - we return the second map if it exists, else the first
572 struct imsm_map
*map
= &dev
->vol
.map
[0];
574 if (second_map
== 1 && !dev
->vol
.migr_state
)
576 else if (second_map
== 1 ||
577 (second_map
< 0 && dev
->vol
.migr_state
)) {
580 return ptr
+ sizeof_imsm_map(map
);
586 /* return the size of the device.
587 * migr_state increases the returned size if map[0] were to be duplicated
589 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
, int migr_state
)
591 size_t size
= sizeof(*dev
) - sizeof(struct imsm_map
) +
592 sizeof_imsm_map(get_imsm_map(dev
, 0));
594 /* migrating means an additional map */
595 if (dev
->vol
.migr_state
)
596 size
+= sizeof_imsm_map(get_imsm_map(dev
, 1));
598 size
+= sizeof_imsm_map(get_imsm_map(dev
, 0));
604 /* retrieve disk serial number list from a metadata update */
605 static struct disk_info
*get_disk_info(struct imsm_update_create_array
*update
)
608 struct disk_info
*inf
;
610 inf
= u
+ sizeof(*update
) - sizeof(struct imsm_dev
) +
611 sizeof_imsm_dev(&update
->dev
, 0);
617 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
623 if (index
>= mpb
->num_raid_devs
)
626 /* devices start after all disks */
627 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
629 for (i
= 0; i
<= index
; i
++)
631 return _mpb
+ offset
;
633 offset
+= sizeof_imsm_dev(_mpb
+ offset
, 0);
638 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
640 struct intel_dev
*dv
;
642 if (index
>= super
->anchor
->num_raid_devs
)
644 for (dv
= super
->devlist
; dv
; dv
= dv
->next
)
645 if (dv
->index
== index
)
653 * == 1 get second map
654 * == -1 than get map according to the current migr_state
656 static __u32
get_imsm_ord_tbl_ent(struct imsm_dev
*dev
,
660 struct imsm_map
*map
;
662 map
= get_imsm_map(dev
, second_map
);
664 /* top byte identifies disk under rebuild */
665 return __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
668 #define ord_to_idx(ord) (((ord) << 8) >> 8)
669 static __u32
get_imsm_disk_idx(struct imsm_dev
*dev
, int slot
, int second_map
)
671 __u32 ord
= get_imsm_ord_tbl_ent(dev
, slot
, second_map
);
673 return ord_to_idx(ord
);
676 static void set_imsm_ord_tbl_ent(struct imsm_map
*map
, int slot
, __u32 ord
)
678 map
->disk_ord_tbl
[slot
] = __cpu_to_le32(ord
);
681 static int get_imsm_disk_slot(struct imsm_map
*map
, unsigned idx
)
686 for (slot
= 0; slot
< map
->num_members
; slot
++) {
687 ord
= __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
688 if (ord_to_idx(ord
) == idx
)
695 static int get_imsm_raid_level(struct imsm_map
*map
)
697 if (map
->raid_level
== 1) {
698 if (map
->num_members
== 2)
704 return map
->raid_level
;
707 static int cmp_extent(const void *av
, const void *bv
)
709 const struct extent
*a
= av
;
710 const struct extent
*b
= bv
;
711 if (a
->start
< b
->start
)
713 if (a
->start
> b
->start
)
718 static int count_memberships(struct dl
*dl
, struct intel_super
*super
)
723 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
724 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
725 struct imsm_map
*map
= get_imsm_map(dev
, 0);
727 if (get_imsm_disk_slot(map
, dl
->index
) >= 0)
734 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
736 /* find a list of used extents on the given physical device */
737 struct extent
*rv
, *e
;
739 int memberships
= count_memberships(dl
, super
);
740 __u32 reservation
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
742 rv
= malloc(sizeof(struct extent
) * (memberships
+ 1));
747 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
748 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
749 struct imsm_map
*map
= get_imsm_map(dev
, 0);
751 if (get_imsm_disk_slot(map
, dl
->index
) >= 0) {
752 e
->start
= __le32_to_cpu(map
->pba_of_lba0
);
753 e
->size
= __le32_to_cpu(map
->blocks_per_member
);
757 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
759 /* determine the start of the metadata
760 * when no raid devices are defined use the default
761 * ...otherwise allow the metadata to truncate the value
762 * as is the case with older versions of imsm
765 struct extent
*last
= &rv
[memberships
- 1];
768 remainder
= __le32_to_cpu(dl
->disk
.total_blocks
) -
769 (last
->start
+ last
->size
);
770 /* round down to 1k block to satisfy precision of the kernel
774 /* make sure remainder is still sane */
775 if (remainder
< (unsigned)ROUND_UP(super
->len
, 512) >> 9)
776 remainder
= ROUND_UP(super
->len
, 512) >> 9;
777 if (reservation
> remainder
)
778 reservation
= remainder
;
780 e
->start
= __le32_to_cpu(dl
->disk
.total_blocks
) - reservation
;
785 /* try to determine how much space is reserved for metadata from
786 * the last get_extents() entry, otherwise fallback to the
789 static __u32
imsm_reserved_sectors(struct intel_super
*super
, struct dl
*dl
)
795 /* for spares just return a minimal reservation which will grow
796 * once the spare is picked up by an array
799 return MPB_SECTOR_CNT
;
801 e
= get_extents(super
, dl
);
803 return MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
805 /* scroll to last entry */
806 for (i
= 0; e
[i
].size
; i
++)
809 rv
= __le32_to_cpu(dl
->disk
.total_blocks
) - e
[i
].start
;
816 static int is_spare(struct imsm_disk
*disk
)
818 return (disk
->status
& SPARE_DISK
) == SPARE_DISK
;
821 static int is_configured(struct imsm_disk
*disk
)
823 return (disk
->status
& CONFIGURED_DISK
) == CONFIGURED_DISK
;
826 static int is_failed(struct imsm_disk
*disk
)
828 return (disk
->status
& FAILED_DISK
) == FAILED_DISK
;
831 /* Return minimum size of a spare that can be used in this array*/
832 static unsigned long long min_acceptable_spare_size_imsm(struct supertype
*st
)
834 struct intel_super
*super
= st
->sb
;
838 unsigned long long rv
= 0;
842 /* find first active disk in array */
844 while (dl
&& (is_failed(&dl
->disk
) || dl
->index
== -1))
848 /* find last lba used by subarrays */
849 e
= get_extents(super
, dl
);
852 for (i
= 0; e
[i
].size
; i
++)
855 rv
= e
[i
-1].start
+ e
[i
-1].size
;
857 /* add the amount of space needed for metadata */
858 rv
= rv
+ MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
863 static __u64
blocks_per_migr_unit(struct imsm_dev
*dev
);
865 static void print_imsm_dev(struct imsm_dev
*dev
, char *uuid
, int disk_idx
)
869 struct imsm_map
*map
= get_imsm_map(dev
, 0);
870 struct imsm_map
*map2
= get_imsm_map(dev
, 1);
874 printf("[%.16s]:\n", dev
->volume
);
875 printf(" UUID : %s\n", uuid
);
876 printf(" RAID Level : %d", get_imsm_raid_level(map
));
878 printf(" <-- %d", get_imsm_raid_level(map2
));
880 printf(" Members : %d", map
->num_members
);
882 printf(" <-- %d", map2
->num_members
);
884 printf(" Slots : [");
885 for (i
= 0; i
< map
->num_members
; i
++) {
886 ord
= get_imsm_ord_tbl_ent(dev
, i
, 0);
887 printf("%s", ord
& IMSM_ORD_REBUILD
? "_" : "U");
892 for (i
= 0; i
< map2
->num_members
; i
++) {
893 ord
= get_imsm_ord_tbl_ent(dev
, i
, 1);
894 printf("%s", ord
& IMSM_ORD_REBUILD
? "_" : "U");
899 printf(" Failed disk : ");
900 if (map
->failed_disk_num
== 0xff)
903 printf("%i", map
->failed_disk_num
);
905 slot
= get_imsm_disk_slot(map
, disk_idx
);
907 ord
= get_imsm_ord_tbl_ent(dev
, slot
, -1);
908 printf(" This Slot : %d%s\n", slot
,
909 ord
& IMSM_ORD_REBUILD
? " (out-of-sync)" : "");
911 printf(" This Slot : ?\n");
912 sz
= __le32_to_cpu(dev
->size_high
);
914 sz
+= __le32_to_cpu(dev
->size_low
);
915 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
916 human_size(sz
* 512));
917 sz
= __le32_to_cpu(map
->blocks_per_member
);
918 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
919 human_size(sz
* 512));
920 printf(" Sector Offset : %u\n",
921 __le32_to_cpu(map
->pba_of_lba0
));
922 printf(" Num Stripes : %u\n",
923 __le32_to_cpu(map
->num_data_stripes
));
924 printf(" Chunk Size : %u KiB",
925 __le16_to_cpu(map
->blocks_per_strip
) / 2);
927 printf(" <-- %u KiB",
928 __le16_to_cpu(map2
->blocks_per_strip
) / 2);
930 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
931 printf(" Migrate State : ");
932 if (dev
->vol
.migr_state
) {
933 if (migr_type(dev
) == MIGR_INIT
)
934 printf("initialize\n");
935 else if (migr_type(dev
) == MIGR_REBUILD
)
937 else if (migr_type(dev
) == MIGR_VERIFY
)
939 else if (migr_type(dev
) == MIGR_GEN_MIGR
)
940 printf("general migration\n");
941 else if (migr_type(dev
) == MIGR_STATE_CHANGE
)
942 printf("state change\n");
943 else if (migr_type(dev
) == MIGR_REPAIR
)
946 printf("<unknown:%d>\n", migr_type(dev
));
949 printf(" Map State : %s", map_state_str
[map
->map_state
]);
950 if (dev
->vol
.migr_state
) {
951 struct imsm_map
*map
= get_imsm_map(dev
, 1);
953 printf(" <-- %s", map_state_str
[map
->map_state
]);
954 printf("\n Checkpoint : %u (%llu)",
955 __le32_to_cpu(dev
->vol
.curr_migr_unit
),
956 (unsigned long long)blocks_per_migr_unit(dev
));
959 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
962 static void print_imsm_disk(struct imsm_super
*mpb
, int index
, __u32 reserved
)
964 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, index
);
965 char str
[MAX_RAID_SERIAL_LEN
+ 1];
968 if (index
< 0 || !disk
)
972 snprintf(str
, MAX_RAID_SERIAL_LEN
+ 1, "%s", disk
->serial
);
973 printf(" Disk%02d Serial : %s\n", index
, str
);
974 printf(" State :%s%s%s\n", is_spare(disk
) ? " spare" : "",
975 is_configured(disk
) ? " active" : "",
976 is_failed(disk
) ? " failed" : "");
977 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
978 sz
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
979 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
980 human_size(sz
* 512));
983 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
, char *map
);
985 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
987 struct intel_super
*super
= st
->sb
;
988 struct imsm_super
*mpb
= super
->anchor
;
989 char str
[MAX_SIGNATURE_LENGTH
];
994 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
997 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
998 printf(" Magic : %s\n", str
);
999 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
1000 printf(" Version : %s\n", get_imsm_version(mpb
));
1001 printf(" Orig Family : %08x\n", __le32_to_cpu(mpb
->orig_family_num
));
1002 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
1003 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
1004 getinfo_super_imsm(st
, &info
, NULL
);
1005 fname_from_uuid(st
, &info
, nbuf
, ':');
1006 printf(" UUID : %s\n", nbuf
+ 5);
1007 sum
= __le32_to_cpu(mpb
->check_sum
);
1008 printf(" Checksum : %08x %s\n", sum
,
1009 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
1010 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
1011 printf(" Disks : %d\n", mpb
->num_disks
);
1012 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
1013 print_imsm_disk(mpb
, super
->disks
->index
, reserved
);
1014 if (super
->bbm_log
) {
1015 struct bbm_log
*log
= super
->bbm_log
;
1018 printf("Bad Block Management Log:\n");
1019 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
1020 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
1021 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
1022 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
1023 printf(" First Spare : %llx\n",
1024 (unsigned long long) __le64_to_cpu(log
->first_spare_lba
));
1026 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1028 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1030 super
->current_vol
= i
;
1031 getinfo_super_imsm(st
, &info
, NULL
);
1032 fname_from_uuid(st
, &info
, nbuf
, ':');
1033 print_imsm_dev(dev
, nbuf
+ 5, super
->disks
->index
);
1035 for (i
= 0; i
< mpb
->num_disks
; i
++) {
1036 if (i
== super
->disks
->index
)
1038 print_imsm_disk(mpb
, i
, reserved
);
1040 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1041 struct imsm_disk
*disk
;
1042 char str
[MAX_RAID_SERIAL_LEN
+ 1];
1050 snprintf(str
, MAX_RAID_SERIAL_LEN
+ 1, "%s", disk
->serial
);
1051 printf(" Disk Serial : %s\n", str
);
1052 printf(" State :%s%s%s\n", is_spare(disk
) ? " spare" : "",
1053 is_configured(disk
) ? " active" : "",
1054 is_failed(disk
) ? " failed" : "");
1055 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
1056 sz
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
1057 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
1058 human_size(sz
* 512));
1062 static void brief_examine_super_imsm(struct supertype
*st
, int verbose
)
1064 /* We just write a generic IMSM ARRAY entry */
1067 struct intel_super
*super
= st
->sb
;
1069 if (!super
->anchor
->num_raid_devs
) {
1070 printf("ARRAY metadata=imsm\n");
1074 getinfo_super_imsm(st
, &info
, NULL
);
1075 fname_from_uuid(st
, &info
, nbuf
, ':');
1076 printf("ARRAY metadata=imsm UUID=%s\n", nbuf
+ 5);
1079 static void brief_examine_subarrays_imsm(struct supertype
*st
, int verbose
)
1081 /* We just write a generic IMSM ARRAY entry */
1085 struct intel_super
*super
= st
->sb
;
1088 if (!super
->anchor
->num_raid_devs
)
1091 getinfo_super_imsm(st
, &info
, NULL
);
1092 fname_from_uuid(st
, &info
, nbuf
, ':');
1093 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
1094 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
1096 super
->current_vol
= i
;
1097 getinfo_super_imsm(st
, &info
, NULL
);
1098 fname_from_uuid(st
, &info
, nbuf1
, ':');
1099 printf("ARRAY /dev/md/%.16s container=%s member=%d UUID=%s\n",
1100 dev
->volume
, nbuf
+ 5, i
, nbuf1
+ 5);
1104 static void export_examine_super_imsm(struct supertype
*st
)
1106 struct intel_super
*super
= st
->sb
;
1107 struct imsm_super
*mpb
= super
->anchor
;
1111 getinfo_super_imsm(st
, &info
, NULL
);
1112 fname_from_uuid(st
, &info
, nbuf
, ':');
1113 printf("MD_METADATA=imsm\n");
1114 printf("MD_LEVEL=container\n");
1115 printf("MD_UUID=%s\n", nbuf
+5);
1116 printf("MD_DEVICES=%u\n", mpb
->num_disks
);
1119 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
1124 getinfo_super_imsm(st
, &info
, NULL
);
1125 fname_from_uuid(st
, &info
, nbuf
, ':');
1126 printf("\n UUID : %s\n", nbuf
+ 5);
1129 static void brief_detail_super_imsm(struct supertype
*st
)
1133 getinfo_super_imsm(st
, &info
, NULL
);
1134 fname_from_uuid(st
, &info
, nbuf
, ':');
1135 printf(" UUID=%s", nbuf
+ 5);
1138 static int imsm_read_serial(int fd
, char *devname
, __u8
*serial
);
1139 static void fd2devname(int fd
, char *name
);
1141 static int ahci_enumerate_ports(const char *hba_path
, int port_count
, int host_base
, int verbose
)
1143 /* dump an unsorted list of devices attached to AHCI Intel storage
1144 * controller, as well as non-connected ports
1146 int hba_len
= strlen(hba_path
) + 1;
1151 unsigned long port_mask
= (1 << port_count
) - 1;
1153 if (port_count
> (int)sizeof(port_mask
) * 8) {
1155 fprintf(stderr
, Name
": port_count %d out of range\n", port_count
);
1159 /* scroll through /sys/dev/block looking for devices attached to
1162 dir
= opendir("/sys/dev/block");
1163 for (ent
= dir
? readdir(dir
) : NULL
; ent
; ent
= readdir(dir
)) {
1174 if (sscanf(ent
->d_name
, "%d:%d", &major
, &minor
) != 2)
1176 path
= devt_to_devpath(makedev(major
, minor
));
1179 if (!path_attached_to_hba(path
, hba_path
)) {
1185 /* retrieve the scsi device type */
1186 if (asprintf(&device
, "/sys/dev/block/%d:%d/device/xxxxxxx", major
, minor
) < 0) {
1188 fprintf(stderr
, Name
": failed to allocate 'device'\n");
1192 sprintf(device
, "/sys/dev/block/%d:%d/device/type", major
, minor
);
1193 if (load_sys(device
, buf
) != 0) {
1195 fprintf(stderr
, Name
": failed to read device type for %s\n",
1201 type
= strtoul(buf
, NULL
, 10);
1203 /* if it's not a disk print the vendor and model */
1204 if (!(type
== 0 || type
== 7 || type
== 14)) {
1207 sprintf(device
, "/sys/dev/block/%d:%d/device/vendor", major
, minor
);
1208 if (load_sys(device
, buf
) == 0) {
1209 strncpy(vendor
, buf
, sizeof(vendor
));
1210 vendor
[sizeof(vendor
) - 1] = '\0';
1211 c
= (char *) &vendor
[sizeof(vendor
) - 1];
1212 while (isspace(*c
) || *c
== '\0')
1216 sprintf(device
, "/sys/dev/block/%d:%d/device/model", major
, minor
);
1217 if (load_sys(device
, buf
) == 0) {
1218 strncpy(model
, buf
, sizeof(model
));
1219 model
[sizeof(model
) - 1] = '\0';
1220 c
= (char *) &model
[sizeof(model
) - 1];
1221 while (isspace(*c
) || *c
== '\0')
1225 if (vendor
[0] && model
[0])
1226 sprintf(buf
, "%.64s %.64s", vendor
, model
);
1228 switch (type
) { /* numbers from hald/linux/device.c */
1229 case 1: sprintf(buf
, "tape"); break;
1230 case 2: sprintf(buf
, "printer"); break;
1231 case 3: sprintf(buf
, "processor"); break;
1233 case 5: sprintf(buf
, "cdrom"); break;
1234 case 6: sprintf(buf
, "scanner"); break;
1235 case 8: sprintf(buf
, "media_changer"); break;
1236 case 9: sprintf(buf
, "comm"); break;
1237 case 12: sprintf(buf
, "raid"); break;
1238 default: sprintf(buf
, "unknown");
1244 /* chop device path to 'host%d' and calculate the port number */
1245 c
= strchr(&path
[hba_len
], '/');
1248 fprintf(stderr
, Name
": %s - invalid path name\n", path
+ hba_len
);
1253 if (sscanf(&path
[hba_len
], "host%d", &port
) == 1)
1257 *c
= '/'; /* repair the full string */
1258 fprintf(stderr
, Name
": failed to determine port number for %s\n",
1265 /* mark this port as used */
1266 port_mask
&= ~(1 << port
);
1268 /* print out the device information */
1270 printf(" Port%d : - non-disk device (%s) -\n", port
, buf
);
1274 fd
= dev_open(ent
->d_name
, O_RDONLY
);
1276 printf(" Port%d : - disk info unavailable -\n", port
);
1278 fd2devname(fd
, buf
);
1279 printf(" Port%d : %s", port
, buf
);
1280 if (imsm_read_serial(fd
, NULL
, (__u8
*) buf
) == 0)
1281 printf(" (%s)\n", buf
);
1296 for (i
= 0; i
< port_count
; i
++)
1297 if (port_mask
& (1 << i
))
1298 printf(" Port%d : - no device attached -\n", i
);
1306 static void print_found_intel_controllers(struct sys_dev
*elem
)
1308 for (; elem
; elem
= elem
->next
) {
1309 fprintf(stderr
, Name
": found Intel(R) ");
1310 if (elem
->type
== SYS_DEV_SATA
)
1311 fprintf(stderr
, "SATA ");
1312 else if (elem
->type
== SYS_DEV_SAS
)
1313 fprintf(stderr
, "SAS ");
1314 fprintf(stderr
, "RAID controller");
1316 fprintf(stderr
, " at %s", elem
->pci_id
);
1317 fprintf(stderr
, ".\n");
1322 static int ahci_get_port_count(const char *hba_path
, int *port_count
)
1329 if ((dir
= opendir(hba_path
)) == NULL
)
1332 for (ent
= readdir(dir
); ent
; ent
= readdir(dir
)) {
1335 if (sscanf(ent
->d_name
, "host%d", &host
) != 1)
1337 if (*port_count
== 0)
1339 else if (host
< host_base
)
1342 if (host
+ 1 > *port_count
+ host_base
)
1343 *port_count
= host
+ 1 - host_base
;
1349 static void print_imsm_capability(const struct imsm_orom
*orom
)
1351 printf(" Platform : Intel(R) Matrix Storage Manager\n");
1352 printf(" Version : %d.%d.%d.%d\n", orom
->major_ver
, orom
->minor_ver
,
1353 orom
->hotfix_ver
, orom
->build
);
1354 printf(" RAID Levels :%s%s%s%s%s\n",
1355 imsm_orom_has_raid0(orom
) ? " raid0" : "",
1356 imsm_orom_has_raid1(orom
) ? " raid1" : "",
1357 imsm_orom_has_raid1e(orom
) ? " raid1e" : "",
1358 imsm_orom_has_raid10(orom
) ? " raid10" : "",
1359 imsm_orom_has_raid5(orom
) ? " raid5" : "");
1360 printf(" Chunk Sizes :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
1361 imsm_orom_has_chunk(orom
, 2) ? " 2k" : "",
1362 imsm_orom_has_chunk(orom
, 4) ? " 4k" : "",
1363 imsm_orom_has_chunk(orom
, 8) ? " 8k" : "",
1364 imsm_orom_has_chunk(orom
, 16) ? " 16k" : "",
1365 imsm_orom_has_chunk(orom
, 32) ? " 32k" : "",
1366 imsm_orom_has_chunk(orom
, 64) ? " 64k" : "",
1367 imsm_orom_has_chunk(orom
, 128) ? " 128k" : "",
1368 imsm_orom_has_chunk(orom
, 256) ? " 256k" : "",
1369 imsm_orom_has_chunk(orom
, 512) ? " 512k" : "",
1370 imsm_orom_has_chunk(orom
, 1024*1) ? " 1M" : "",
1371 imsm_orom_has_chunk(orom
, 1024*2) ? " 2M" : "",
1372 imsm_orom_has_chunk(orom
, 1024*4) ? " 4M" : "",
1373 imsm_orom_has_chunk(orom
, 1024*8) ? " 8M" : "",
1374 imsm_orom_has_chunk(orom
, 1024*16) ? " 16M" : "",
1375 imsm_orom_has_chunk(orom
, 1024*32) ? " 32M" : "",
1376 imsm_orom_has_chunk(orom
, 1024*64) ? " 64M" : "");
1377 printf(" Max Disks : %d\n", orom
->tds
);
1378 printf(" Max Volumes : %d\n", orom
->vpa
);
1382 static int detail_platform_imsm(int verbose
, int enumerate_only
)
1384 /* There are two components to imsm platform support, the ahci SATA
1385 * controller and the option-rom. To find the SATA controller we
1386 * simply look in /sys/bus/pci/drivers/ahci to see if an ahci
1387 * controller with the Intel vendor id is present. This approach
1388 * allows mdadm to leverage the kernel's ahci detection logic, with the
1389 * caveat that if ahci.ko is not loaded mdadm will not be able to
1390 * detect platform raid capabilities. The option-rom resides in a
1391 * platform "Adapter ROM". We scan for its signature to retrieve the
1392 * platform capabilities. If raid support is disabled in the BIOS the
1393 * option-rom capability structure will not be available.
1395 const struct imsm_orom
*orom
;
1396 struct sys_dev
*list
, *hba
;
1401 if (enumerate_only
) {
1402 if (check_env("IMSM_NO_PLATFORM"))
1404 list
= find_intel_devices();
1407 for (hba
= list
; hba
; hba
= hba
->next
) {
1408 orom
= find_imsm_capability(hba
->type
);
1414 free_sys_dev(&list
);
1418 list
= find_intel_devices();
1421 fprintf(stderr
, Name
": no active Intel(R) RAID "
1422 "controller found.\n");
1423 free_sys_dev(&list
);
1426 print_found_intel_controllers(list
);
1428 for (hba
= list
; hba
; hba
= hba
->next
) {
1429 orom
= find_imsm_capability(hba
->type
);
1431 fprintf(stderr
, Name
": imsm capabilities not found for controller: %s (type %s)\n",
1432 hba
->path
, get_sys_dev_type(hba
->type
));
1434 print_imsm_capability(orom
);
1437 for (hba
= list
; hba
; hba
= hba
->next
) {
1438 printf(" I/O Controller : %s (%s)\n",
1439 hba
->path
, get_sys_dev_type(hba
->type
));
1441 if (hba
->type
== SYS_DEV_SATA
) {
1442 host_base
= ahci_get_port_count(hba
->path
, &port_count
);
1443 if (ahci_enumerate_ports(hba
->path
, port_count
, host_base
, verbose
)) {
1445 fprintf(stderr
, Name
": failed to enumerate "
1446 "ports on SATA controller at %s.", hba
->pci_id
);
1452 free_sys_dev(&list
);
1457 static int match_home_imsm(struct supertype
*st
, char *homehost
)
1459 /* the imsm metadata format does not specify any host
1460 * identification information. We return -1 since we can never
1461 * confirm nor deny whether a given array is "meant" for this
1462 * host. We rely on compare_super and the 'family_num' fields to
1463 * exclude member disks that do not belong, and we rely on
1464 * mdadm.conf to specify the arrays that should be assembled.
1465 * Auto-assembly may still pick up "foreign" arrays.
1471 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
1473 /* The uuid returned here is used for:
1474 * uuid to put into bitmap file (Create, Grow)
1475 * uuid for backup header when saving critical section (Grow)
1476 * comparing uuids when re-adding a device into an array
1477 * In these cases the uuid required is that of the data-array,
1478 * not the device-set.
1479 * uuid to recognise same set when adding a missing device back
1480 * to an array. This is a uuid for the device-set.
1482 * For each of these we can make do with a truncated
1483 * or hashed uuid rather than the original, as long as
1485 * In each case the uuid required is that of the data-array,
1486 * not the device-set.
1488 /* imsm does not track uuid's so we synthesis one using sha1 on
1489 * - The signature (Which is constant for all imsm array, but no matter)
1490 * - the orig_family_num of the container
1491 * - the index number of the volume
1492 * - the 'serial' number of the volume.
1493 * Hopefully these are all constant.
1495 struct intel_super
*super
= st
->sb
;
1498 struct sha1_ctx ctx
;
1499 struct imsm_dev
*dev
= NULL
;
1502 /* some mdadm versions failed to set ->orig_family_num, in which
1503 * case fall back to ->family_num. orig_family_num will be
1504 * fixed up with the first metadata update.
1506 family_num
= super
->anchor
->orig_family_num
;
1507 if (family_num
== 0)
1508 family_num
= super
->anchor
->family_num
;
1509 sha1_init_ctx(&ctx
);
1510 sha1_process_bytes(super
->anchor
->sig
, MPB_SIG_LEN
, &ctx
);
1511 sha1_process_bytes(&family_num
, sizeof(__u32
), &ctx
);
1512 if (super
->current_vol
>= 0)
1513 dev
= get_imsm_dev(super
, super
->current_vol
);
1515 __u32 vol
= super
->current_vol
;
1516 sha1_process_bytes(&vol
, sizeof(vol
), &ctx
);
1517 sha1_process_bytes(dev
->volume
, MAX_RAID_SERIAL_LEN
, &ctx
);
1519 sha1_finish_ctx(&ctx
, buf
);
1520 memcpy(uuid
, buf
, 4*4);
1525 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
1527 __u8
*v
= get_imsm_version(mpb
);
1528 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
1529 char major
[] = { 0, 0, 0 };
1530 char minor
[] = { 0 ,0, 0 };
1531 char patch
[] = { 0, 0, 0 };
1532 char *ver_parse
[] = { major
, minor
, patch
};
1536 while (*v
!= '\0' && v
< end
) {
1537 if (*v
!= '.' && j
< 2)
1538 ver_parse
[i
][j
++] = *v
;
1546 *m
= strtol(minor
, NULL
, 0);
1547 *p
= strtol(patch
, NULL
, 0);
1551 static __u32
migr_strip_blocks_resync(struct imsm_dev
*dev
)
1553 /* migr_strip_size when repairing or initializing parity */
1554 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1555 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
1557 switch (get_imsm_raid_level(map
)) {
1562 return 128*1024 >> 9;
1566 static __u32
migr_strip_blocks_rebuild(struct imsm_dev
*dev
)
1568 /* migr_strip_size when rebuilding a degraded disk, no idea why
1569 * this is different than migr_strip_size_resync(), but it's good
1572 struct imsm_map
*map
= get_imsm_map(dev
, 1);
1573 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
1575 switch (get_imsm_raid_level(map
)) {
1578 if (map
->num_members
% map
->num_domains
== 0)
1579 return 128*1024 >> 9;
1583 return max((__u32
) 64*1024 >> 9, chunk
);
1585 return 128*1024 >> 9;
1589 static __u32
num_stripes_per_unit_resync(struct imsm_dev
*dev
)
1591 struct imsm_map
*lo
= get_imsm_map(dev
, 0);
1592 struct imsm_map
*hi
= get_imsm_map(dev
, 1);
1593 __u32 lo_chunk
= __le32_to_cpu(lo
->blocks_per_strip
);
1594 __u32 hi_chunk
= __le32_to_cpu(hi
->blocks_per_strip
);
1596 return max((__u32
) 1, hi_chunk
/ lo_chunk
);
1599 static __u32
num_stripes_per_unit_rebuild(struct imsm_dev
*dev
)
1601 struct imsm_map
*lo
= get_imsm_map(dev
, 0);
1602 int level
= get_imsm_raid_level(lo
);
1604 if (level
== 1 || level
== 10) {
1605 struct imsm_map
*hi
= get_imsm_map(dev
, 1);
1607 return hi
->num_domains
;
1609 return num_stripes_per_unit_resync(dev
);
1612 static __u8
imsm_num_data_members(struct imsm_dev
*dev
, int second_map
)
1614 /* named 'imsm_' because raid0, raid1 and raid10
1615 * counter-intuitively have the same number of data disks
1617 struct imsm_map
*map
= get_imsm_map(dev
, second_map
);
1619 switch (get_imsm_raid_level(map
)) {
1623 return map
->num_members
;
1625 return map
->num_members
- 1;
1627 dprintf("%s: unsupported raid level\n", __func__
);
1632 static __u32
parity_segment_depth(struct imsm_dev
*dev
)
1634 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1635 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
1637 switch(get_imsm_raid_level(map
)) {
1640 return chunk
* map
->num_domains
;
1642 return chunk
* map
->num_members
;
1648 static __u32
map_migr_block(struct imsm_dev
*dev
, __u32 block
)
1650 struct imsm_map
*map
= get_imsm_map(dev
, 1);
1651 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
1652 __u32 strip
= block
/ chunk
;
1654 switch (get_imsm_raid_level(map
)) {
1657 __u32 vol_strip
= (strip
* map
->num_domains
) + 1;
1658 __u32 vol_stripe
= vol_strip
/ map
->num_members
;
1660 return vol_stripe
* chunk
+ block
% chunk
;
1662 __u32 stripe
= strip
/ (map
->num_members
- 1);
1664 return stripe
* chunk
+ block
% chunk
;
1671 static __u64
blocks_per_migr_unit(struct imsm_dev
*dev
)
1673 /* calculate the conversion factor between per member 'blocks'
1674 * (md/{resync,rebuild}_start) and imsm migration units, return
1675 * 0 for the 'not migrating' and 'unsupported migration' cases
1677 if (!dev
->vol
.migr_state
)
1680 switch (migr_type(dev
)) {
1685 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1686 __u32 stripes_per_unit
;
1687 __u32 blocks_per_unit
;
1696 /* yes, this is really the translation of migr_units to
1697 * per-member blocks in the 'resync' case
1699 stripes_per_unit
= num_stripes_per_unit_resync(dev
);
1700 migr_chunk
= migr_strip_blocks_resync(dev
);
1701 disks
= imsm_num_data_members(dev
, 0);
1702 blocks_per_unit
= stripes_per_unit
* migr_chunk
* disks
;
1703 stripe
= __le32_to_cpu(map
->blocks_per_strip
) * disks
;
1704 segment
= blocks_per_unit
/ stripe
;
1705 block_rel
= blocks_per_unit
- segment
* stripe
;
1706 parity_depth
= parity_segment_depth(dev
);
1707 block_map
= map_migr_block(dev
, block_rel
);
1708 return block_map
+ parity_depth
* segment
;
1710 case MIGR_REBUILD
: {
1711 __u32 stripes_per_unit
;
1714 stripes_per_unit
= num_stripes_per_unit_rebuild(dev
);
1715 migr_chunk
= migr_strip_blocks_rebuild(dev
);
1716 return migr_chunk
* stripes_per_unit
;
1718 case MIGR_STATE_CHANGE
:
1724 static int imsm_level_to_layout(int level
)
1732 return ALGORITHM_LEFT_ASYMMETRIC
;
1739 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
, char *dmap
)
1741 struct intel_super
*super
= st
->sb
;
1742 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
1743 struct imsm_map
*map
= get_imsm_map(dev
, 0);
1744 struct imsm_map
*prev_map
= get_imsm_map(dev
, 1);
1745 struct imsm_map
*map_to_analyse
= map
;
1748 int map_disks
= info
->array
.raid_disks
;
1751 map_to_analyse
= prev_map
;
1753 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1754 if (dl
->raiddisk
== info
->disk
.raid_disk
)
1756 info
->container_member
= super
->current_vol
;
1757 info
->array
.raid_disks
= map_to_analyse
->num_members
;
1758 info
->array
.level
= get_imsm_raid_level(map_to_analyse
);
1759 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
1760 info
->array
.md_minor
= -1;
1761 info
->array
.ctime
= 0;
1762 info
->array
.utime
= 0;
1763 info
->array
.chunk_size
=
1764 __le16_to_cpu(map_to_analyse
->blocks_per_strip
) << 9;
1765 info
->array
.state
= !dev
->vol
.dirty
;
1766 info
->custom_array_size
= __le32_to_cpu(dev
->size_high
);
1767 info
->custom_array_size
<<= 32;
1768 info
->custom_array_size
|= __le32_to_cpu(dev
->size_low
);
1769 if (prev_map
&& map
->map_state
== prev_map
->map_state
) {
1770 info
->reshape_active
= 1;
1771 info
->new_level
= get_imsm_raid_level(map
);
1772 info
->new_layout
= imsm_level_to_layout(info
->new_level
);
1773 info
->new_chunk
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
1774 info
->delta_disks
= map
->num_members
- prev_map
->num_members
;
1775 if (info
->delta_disks
) {
1776 /* this needs to be applied to every array
1779 info
->reshape_active
= 2;
1781 /* We shape information that we give to md might have to be
1782 * modify to cope with md's requirement for reshaping arrays.
1783 * For example, when reshaping a RAID0, md requires it to be
1784 * presented as a degraded RAID4.
1785 * Also if a RAID0 is migrating to a RAID5 we need to specify
1786 * the array as already being RAID5, but the 'before' layout
1787 * is a RAID4-like layout.
1789 switch (info
->array
.level
) {
1791 switch(info
->new_level
) {
1793 /* conversion is happening as RAID4 */
1794 info
->array
.level
= 4;
1795 info
->array
.raid_disks
+= 1;
1798 /* conversion is happening as RAID5 */
1799 info
->array
.level
= 5;
1800 info
->array
.layout
= ALGORITHM_PARITY_N
;
1801 info
->array
.raid_disks
+= 1;
1802 info
->delta_disks
-= 1;
1805 /* FIXME error message */
1806 info
->array
.level
= UnSet
;
1812 info
->new_level
= UnSet
;
1813 info
->new_layout
= UnSet
;
1814 info
->new_chunk
= info
->array
.chunk_size
;
1815 info
->delta_disks
= 0;
1817 info
->disk
.major
= 0;
1818 info
->disk
.minor
= 0;
1820 info
->disk
.major
= dl
->major
;
1821 info
->disk
.minor
= dl
->minor
;
1824 info
->data_offset
= __le32_to_cpu(map_to_analyse
->pba_of_lba0
);
1825 info
->component_size
=
1826 __le32_to_cpu(map_to_analyse
->blocks_per_member
);
1827 memset(info
->uuid
, 0, sizeof(info
->uuid
));
1828 info
->recovery_start
= MaxSector
;
1830 info
->reshape_progress
= 0;
1831 info
->resync_start
= MaxSector
;
1832 if (map_to_analyse
->map_state
== IMSM_T_STATE_UNINITIALIZED
||
1834 info
->resync_start
= 0;
1836 if (dev
->vol
.migr_state
) {
1837 switch (migr_type(dev
)) {
1840 __u64 blocks_per_unit
= blocks_per_migr_unit(dev
);
1841 __u64 units
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
1843 info
->resync_start
= blocks_per_unit
* units
;
1846 case MIGR_GEN_MIGR
: {
1847 __u64 blocks_per_unit
= blocks_per_migr_unit(dev
);
1848 __u64 units
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
1849 unsigned long long array_blocks
;
1852 info
->reshape_progress
= blocks_per_unit
* units
;
1854 /* checkpoint is written per disks unit
1855 * recalculate it to reshape position
1857 used_disks
= imsm_num_data_members(dev
, 0);
1858 info
->reshape_progress
*= used_disks
;
1859 dprintf("IMSM: General Migration checkpoint : %llu "
1860 "(%llu) -> read reshape progress : %llu\n",
1861 units
, blocks_per_unit
, info
->reshape_progress
);
1863 used_disks
= imsm_num_data_members(dev
, 1);
1864 if (used_disks
> 0) {
1865 array_blocks
= map
->blocks_per_member
*
1867 /* round array size down to closest MB
1869 info
->custom_array_size
= (array_blocks
1870 >> SECT_PER_MB_SHIFT
)
1871 << SECT_PER_MB_SHIFT
;
1875 /* we could emulate the checkpointing of
1876 * 'sync_action=check' migrations, but for now
1877 * we just immediately complete them
1880 /* this is handled by container_content_imsm() */
1881 case MIGR_STATE_CHANGE
:
1882 /* FIXME handle other migrations */
1884 /* we are not dirty, so... */
1885 info
->resync_start
= MaxSector
;
1889 strncpy(info
->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
1890 info
->name
[MAX_RAID_SERIAL_LEN
] = 0;
1892 info
->array
.major_version
= -1;
1893 info
->array
.minor_version
= -2;
1894 devname
= devnum2devname(st
->container_dev
);
1895 *info
->text_version
= '\0';
1897 sprintf(info
->text_version
, "/%s/%d", devname
, info
->container_member
);
1899 info
->safe_mode_delay
= 4000; /* 4 secs like the Matrix driver */
1900 uuid_from_super_imsm(st
, info
->uuid
);
1904 for (i
=0; i
<map_disks
; i
++) {
1906 if (i
< info
->array
.raid_disks
) {
1907 struct imsm_disk
*dsk
;
1908 j
= get_imsm_disk_idx(dev
, i
, -1);
1909 dsk
= get_imsm_disk(super
, j
);
1910 if (dsk
&& (dsk
->status
& CONFIGURED_DISK
))
1917 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
, int failed
);
1918 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
);
1920 static struct imsm_disk
*get_imsm_missing(struct intel_super
*super
, __u8 index
)
1924 for (d
= super
->missing
; d
; d
= d
->next
)
1925 if (d
->index
== index
)
1930 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
, char *map
)
1932 struct intel_super
*super
= st
->sb
;
1933 struct imsm_disk
*disk
;
1934 int map_disks
= info
->array
.raid_disks
;
1935 int max_enough
= -1;
1937 struct imsm_super
*mpb
;
1939 if (super
->current_vol
>= 0) {
1940 getinfo_super_imsm_volume(st
, info
, map
);
1944 /* Set raid_disks to zero so that Assemble will always pull in valid
1947 info
->array
.raid_disks
= 0;
1948 info
->array
.level
= LEVEL_CONTAINER
;
1949 info
->array
.layout
= 0;
1950 info
->array
.md_minor
= -1;
1951 info
->array
.ctime
= 0; /* N/A for imsm */
1952 info
->array
.utime
= 0;
1953 info
->array
.chunk_size
= 0;
1955 info
->disk
.major
= 0;
1956 info
->disk
.minor
= 0;
1957 info
->disk
.raid_disk
= -1;
1958 info
->reshape_active
= 0;
1959 info
->array
.major_version
= -1;
1960 info
->array
.minor_version
= -2;
1961 strcpy(info
->text_version
, "imsm");
1962 info
->safe_mode_delay
= 0;
1963 info
->disk
.number
= -1;
1964 info
->disk
.state
= 0;
1966 info
->recovery_start
= MaxSector
;
1968 /* do we have the all the insync disks that we expect? */
1969 mpb
= super
->anchor
;
1971 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1972 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
1973 int failed
, enough
, j
, missing
= 0;
1974 struct imsm_map
*map
;
1977 failed
= imsm_count_failed(super
, dev
);
1978 state
= imsm_check_degraded(super
, dev
, failed
);
1979 map
= get_imsm_map(dev
, dev
->vol
.migr_state
);
1981 /* any newly missing disks?
1982 * (catches single-degraded vs double-degraded)
1984 for (j
= 0; j
< map
->num_members
; j
++) {
1985 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
, -1);
1986 __u32 idx
= ord_to_idx(ord
);
1988 if (!(ord
& IMSM_ORD_REBUILD
) &&
1989 get_imsm_missing(super
, idx
)) {
1995 if (state
== IMSM_T_STATE_FAILED
)
1997 else if (state
== IMSM_T_STATE_DEGRADED
&&
1998 (state
!= map
->map_state
|| missing
))
2000 else /* we're normal, or already degraded */
2003 /* in the missing/failed disk case check to see
2004 * if at least one array is runnable
2006 max_enough
= max(max_enough
, enough
);
2008 dprintf("%s: enough: %d\n", __func__
, max_enough
);
2009 info
->container_enough
= max_enough
;
2012 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
2014 disk
= &super
->disks
->disk
;
2015 info
->data_offset
= __le32_to_cpu(disk
->total_blocks
) - reserved
;
2016 info
->component_size
= reserved
;
2017 info
->disk
.state
= is_configured(disk
) ? (1 << MD_DISK_ACTIVE
) : 0;
2018 /* we don't change info->disk.raid_disk here because
2019 * this state will be finalized in mdmon after we have
2020 * found the 'most fresh' version of the metadata
2022 info
->disk
.state
|= is_failed(disk
) ? (1 << MD_DISK_FAULTY
) : 0;
2023 info
->disk
.state
|= is_spare(disk
) ? 0 : (1 << MD_DISK_SYNC
);
2026 /* only call uuid_from_super_imsm when this disk is part of a populated container,
2027 * ->compare_super may have updated the 'num_raid_devs' field for spares
2029 if (info
->disk
.state
& (1 << MD_DISK_SYNC
) || super
->anchor
->num_raid_devs
)
2030 uuid_from_super_imsm(st
, info
->uuid
);
2032 memcpy(info
->uuid
, uuid_zero
, sizeof(uuid_zero
));
2034 /* I don't know how to compute 'map' on imsm, so use safe default */
2037 for (i
= 0; i
< map_disks
; i
++)
2043 /* allocates memory and fills disk in mdinfo structure
2044 * for each disk in array */
2045 struct mdinfo
*getinfo_super_disks_imsm(struct supertype
*st
)
2047 struct mdinfo
*mddev
= NULL
;
2048 struct intel_super
*super
= st
->sb
;
2049 struct imsm_disk
*disk
;
2052 if (!super
|| !super
->disks
)
2055 mddev
= malloc(sizeof(*mddev
));
2057 fprintf(stderr
, Name
": Failed to allocate memory.\n");
2060 memset(mddev
, 0, sizeof(*mddev
));
2064 tmp
= malloc(sizeof(*tmp
));
2066 fprintf(stderr
, Name
": Failed to allocate memory.\n");
2071 memset(tmp
, 0, sizeof(*tmp
));
2073 tmp
->next
= mddev
->devs
;
2075 tmp
->disk
.number
= count
++;
2076 tmp
->disk
.major
= dl
->major
;
2077 tmp
->disk
.minor
= dl
->minor
;
2078 tmp
->disk
.state
= is_configured(disk
) ?
2079 (1 << MD_DISK_ACTIVE
) : 0;
2080 tmp
->disk
.state
|= is_failed(disk
) ? (1 << MD_DISK_FAULTY
) : 0;
2081 tmp
->disk
.state
|= is_spare(disk
) ? 0 : (1 << MD_DISK_SYNC
);
2082 tmp
->disk
.raid_disk
= -1;
2088 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
2089 char *update
, char *devname
, int verbose
,
2090 int uuid_set
, char *homehost
)
2092 /* For 'assemble' and 'force' we need to return non-zero if any
2093 * change was made. For others, the return value is ignored.
2094 * Update options are:
2095 * force-one : This device looks a bit old but needs to be included,
2096 * update age info appropriately.
2097 * assemble: clear any 'faulty' flag to allow this device to
2099 * force-array: Array is degraded but being forced, mark it clean
2100 * if that will be needed to assemble it.
2102 * newdev: not used ????
2103 * grow: Array has gained a new device - this is currently for
2105 * resync: mark as dirty so a resync will happen.
2106 * name: update the name - preserving the homehost
2107 * uuid: Change the uuid of the array to match watch is given
2109 * Following are not relevant for this imsm:
2110 * sparc2.2 : update from old dodgey metadata
2111 * super-minor: change the preferred_minor number
2112 * summaries: update redundant counters.
2113 * homehost: update the recorded homehost
2114 * _reshape_progress: record new reshape_progress position.
2117 struct intel_super
*super
= st
->sb
;
2118 struct imsm_super
*mpb
;
2120 /* we can only update container info */
2121 if (!super
|| super
->current_vol
>= 0 || !super
->anchor
)
2124 mpb
= super
->anchor
;
2126 if (strcmp(update
, "uuid") == 0 && uuid_set
&& !info
->update_private
)
2128 else if (strcmp(update
, "uuid") == 0 && uuid_set
&& info
->update_private
) {
2129 mpb
->orig_family_num
= *((__u32
*) info
->update_private
);
2131 } else if (strcmp(update
, "uuid") == 0) {
2132 __u32
*new_family
= malloc(sizeof(*new_family
));
2134 /* update orig_family_number with the incoming random
2135 * data, report the new effective uuid, and store the
2136 * new orig_family_num for future updates.
2139 memcpy(&mpb
->orig_family_num
, info
->uuid
, sizeof(__u32
));
2140 uuid_from_super_imsm(st
, info
->uuid
);
2141 *new_family
= mpb
->orig_family_num
;
2142 info
->update_private
= new_family
;
2145 } else if (strcmp(update
, "assemble") == 0)
2150 /* successful update? recompute checksum */
2152 mpb
->check_sum
= __le32_to_cpu(__gen_imsm_checksum(mpb
));
2157 static size_t disks_to_mpb_size(int disks
)
2161 size
= sizeof(struct imsm_super
);
2162 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
2163 size
+= 2 * sizeof(struct imsm_dev
);
2164 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
2165 size
+= (4 - 2) * sizeof(struct imsm_map
);
2166 /* 4 possible disk_ord_tbl's */
2167 size
+= 4 * (disks
- 1) * sizeof(__u32
);
2172 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
)
2174 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
2177 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
2180 static void free_devlist(struct intel_super
*super
)
2182 struct intel_dev
*dv
;
2184 while (super
->devlist
) {
2185 dv
= super
->devlist
->next
;
2186 free(super
->devlist
->dev
);
2187 free(super
->devlist
);
2188 super
->devlist
= dv
;
2192 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
2194 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
2197 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
2201 * 0 same, or first was empty, and second was copied
2202 * 1 second had wrong number
2204 * 3 wrong other info
2206 struct intel_super
*first
= st
->sb
;
2207 struct intel_super
*sec
= tst
->sb
;
2214 /* in platform dependent environment test if the disks
2215 * use the same Intel hba
2217 if (!check_env("IMSM_NO_PLATFORM")) {
2218 if (!first
->hba
|| !sec
->hba
||
2219 (first
->hba
->type
!= sec
->hba
->type
)) {
2221 "HBAs of devices does not match %s != %s\n",
2222 first
->hba
? get_sys_dev_type(first
->hba
->type
) : NULL
,
2223 sec
->hba
? get_sys_dev_type(sec
->hba
->type
) : NULL
);
2228 /* if an anchor does not have num_raid_devs set then it is a free
2231 if (first
->anchor
->num_raid_devs
> 0 &&
2232 sec
->anchor
->num_raid_devs
> 0) {
2233 /* Determine if these disks might ever have been
2234 * related. Further disambiguation can only take place
2235 * in load_super_imsm_all
2237 __u32 first_family
= first
->anchor
->orig_family_num
;
2238 __u32 sec_family
= sec
->anchor
->orig_family_num
;
2240 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
,
2241 MAX_SIGNATURE_LENGTH
) != 0)
2244 if (first_family
== 0)
2245 first_family
= first
->anchor
->family_num
;
2246 if (sec_family
== 0)
2247 sec_family
= sec
->anchor
->family_num
;
2249 if (first_family
!= sec_family
)
2255 /* if 'first' is a spare promote it to a populated mpb with sec's
2258 if (first
->anchor
->num_raid_devs
== 0 &&
2259 sec
->anchor
->num_raid_devs
> 0) {
2261 struct intel_dev
*dv
;
2262 struct imsm_dev
*dev
;
2264 /* we need to copy raid device info from sec if an allocation
2265 * fails here we don't associate the spare
2267 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++) {
2268 dv
= malloc(sizeof(*dv
));
2271 dev
= malloc(sizeof_imsm_dev(get_imsm_dev(sec
, i
), 1));
2278 dv
->next
= first
->devlist
;
2279 first
->devlist
= dv
;
2281 if (i
< sec
->anchor
->num_raid_devs
) {
2282 /* allocation failure */
2283 free_devlist(first
);
2284 fprintf(stderr
, "imsm: failed to associate spare\n");
2287 first
->anchor
->num_raid_devs
= sec
->anchor
->num_raid_devs
;
2288 first
->anchor
->orig_family_num
= sec
->anchor
->orig_family_num
;
2289 first
->anchor
->family_num
= sec
->anchor
->family_num
;
2290 memcpy(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
);
2291 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++)
2292 imsm_copy_dev(get_imsm_dev(first
, i
), get_imsm_dev(sec
, i
));
2298 static void fd2devname(int fd
, char *name
)
2302 char dname
[PATH_MAX
];
2307 if (fstat(fd
, &st
) != 0)
2309 sprintf(path
, "/sys/dev/block/%d:%d",
2310 major(st
.st_rdev
), minor(st
.st_rdev
));
2312 rv
= readlink(path
, dname
, sizeof(dname
));
2317 nm
= strrchr(dname
, '/');
2319 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
2322 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
2324 static int imsm_read_serial(int fd
, char *devname
,
2325 __u8 serial
[MAX_RAID_SERIAL_LEN
])
2327 unsigned char scsi_serial
[255];
2336 memset(scsi_serial
, 0, sizeof(scsi_serial
));
2338 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
2340 if (rv
&& check_env("IMSM_DEVNAME_AS_SERIAL")) {
2341 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
2342 fd2devname(fd
, (char *) serial
);
2349 Name
": Failed to retrieve serial for %s\n",
2354 rsp_len
= scsi_serial
[3];
2358 Name
": Failed to retrieve serial for %s\n",
2362 rsp_buf
= (char *) &scsi_serial
[4];
2364 /* trim all whitespace and non-printable characters and convert
2367 for (i
= 0, dest
= rsp_buf
; i
< rsp_len
; i
++) {
2370 /* ':' is reserved for use in placeholder serial
2371 * numbers for missing disks
2379 len
= dest
- rsp_buf
;
2382 /* truncate leading characters */
2383 if (len
> MAX_RAID_SERIAL_LEN
) {
2384 dest
+= len
- MAX_RAID_SERIAL_LEN
;
2385 len
= MAX_RAID_SERIAL_LEN
;
2388 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
2389 memcpy(serial
, dest
, len
);
2394 static int serialcmp(__u8
*s1
, __u8
*s2
)
2396 return strncmp((char *) s1
, (char *) s2
, MAX_RAID_SERIAL_LEN
);
2399 static void serialcpy(__u8
*dest
, __u8
*src
)
2401 strncpy((char *) dest
, (char *) src
, MAX_RAID_SERIAL_LEN
);
2405 static struct dl
*serial_to_dl(__u8
*serial
, struct intel_super
*super
)
2409 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
2410 if (serialcmp(dl
->serial
, serial
) == 0)
2417 static struct imsm_disk
*
2418 __serial_to_disk(__u8
*serial
, struct imsm_super
*mpb
, int *idx
)
2422 for (i
= 0; i
< mpb
->num_disks
; i
++) {
2423 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, i
);
2425 if (serialcmp(disk
->serial
, serial
) == 0) {
2436 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
2438 struct imsm_disk
*disk
;
2443 __u8 serial
[MAX_RAID_SERIAL_LEN
];
2445 rv
= imsm_read_serial(fd
, devname
, serial
);
2450 dl
= calloc(1, sizeof(*dl
));
2454 Name
": failed to allocate disk buffer for %s\n",
2460 dl
->major
= major(stb
.st_rdev
);
2461 dl
->minor
= minor(stb
.st_rdev
);
2462 dl
->next
= super
->disks
;
2463 dl
->fd
= keep_fd
? fd
: -1;
2464 assert(super
->disks
== NULL
);
2466 serialcpy(dl
->serial
, serial
);
2469 fd2devname(fd
, name
);
2471 dl
->devname
= strdup(devname
);
2473 dl
->devname
= strdup(name
);
2475 /* look up this disk's index in the current anchor */
2476 disk
= __serial_to_disk(dl
->serial
, super
->anchor
, &dl
->index
);
2479 /* only set index on disks that are a member of a
2480 * populated contianer, i.e. one with raid_devs
2482 if (is_failed(&dl
->disk
))
2484 else if (is_spare(&dl
->disk
))
2492 /* When migrating map0 contains the 'destination' state while map1
2493 * contains the current state. When not migrating map0 contains the
2494 * current state. This routine assumes that map[0].map_state is set to
2495 * the current array state before being called.
2497 * Migration is indicated by one of the following states
2498 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
2499 * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal
2500 * map1state=unitialized)
2501 * 3/ Repair (Resync) (migr_state=1 migr_type=MIGR_REPAIR map0state=normal
2503 * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
2504 * map1state=degraded)
2506 static void migrate(struct imsm_dev
*dev
, __u8 to_state
, int migr_type
)
2508 struct imsm_map
*dest
;
2509 struct imsm_map
*src
= get_imsm_map(dev
, 0);
2511 dev
->vol
.migr_state
= 1;
2512 set_migr_type(dev
, migr_type
);
2513 dev
->vol
.curr_migr_unit
= 0;
2514 dest
= get_imsm_map(dev
, 1);
2516 /* duplicate and then set the target end state in map[0] */
2517 memcpy(dest
, src
, sizeof_imsm_map(src
));
2518 if ((migr_type
== MIGR_REBUILD
) ||
2519 (migr_type
== MIGR_GEN_MIGR
)) {
2523 for (i
= 0; i
< src
->num_members
; i
++) {
2524 ord
= __le32_to_cpu(src
->disk_ord_tbl
[i
]);
2525 set_imsm_ord_tbl_ent(src
, i
, ord_to_idx(ord
));
2529 src
->map_state
= to_state
;
2532 static void end_migration(struct imsm_dev
*dev
, __u8 map_state
)
2534 struct imsm_map
*map
= get_imsm_map(dev
, 0);
2535 struct imsm_map
*prev
= get_imsm_map(dev
, dev
->vol
.migr_state
);
2538 /* merge any IMSM_ORD_REBUILD bits that were not successfully
2539 * completed in the last migration.
2541 * FIXME add support for raid-level-migration
2543 for (i
= 0; i
< prev
->num_members
; i
++)
2544 for (j
= 0; j
< map
->num_members
; j
++)
2545 /* during online capacity expansion
2546 * disks position can be changed if takeover is used
2548 if (ord_to_idx(map
->disk_ord_tbl
[j
]) ==
2549 ord_to_idx(prev
->disk_ord_tbl
[i
])) {
2550 map
->disk_ord_tbl
[j
] |= prev
->disk_ord_tbl
[i
];
2554 dev
->vol
.migr_state
= 0;
2555 dev
->vol
.migr_type
= 0;
2556 dev
->vol
.curr_migr_unit
= 0;
2557 map
->map_state
= map_state
;
2561 static int parse_raid_devices(struct intel_super
*super
)
2564 struct imsm_dev
*dev_new
;
2565 size_t len
, len_migr
;
2567 size_t space_needed
= 0;
2568 struct imsm_super
*mpb
= super
->anchor
;
2570 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
2571 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
2572 struct intel_dev
*dv
;
2574 len
= sizeof_imsm_dev(dev_iter
, 0);
2575 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
2577 space_needed
+= len_migr
- len
;
2579 dv
= malloc(sizeof(*dv
));
2582 if (max_len
< len_migr
)
2584 if (max_len
> len_migr
)
2585 space_needed
+= max_len
- len_migr
;
2586 dev_new
= malloc(max_len
);
2591 imsm_copy_dev(dev_new
, dev_iter
);
2594 dv
->next
= super
->devlist
;
2595 super
->devlist
= dv
;
2598 /* ensure that super->buf is large enough when all raid devices
2601 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
2604 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
2605 if (posix_memalign(&buf
, 512, len
) != 0)
2608 memcpy(buf
, super
->buf
, super
->len
);
2609 memset(buf
+ super
->len
, 0, len
- super
->len
);
2618 /* retrieve a pointer to the bbm log which starts after all raid devices */
2619 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
2623 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
2625 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
2631 static void __free_imsm(struct intel_super
*super
, int free_disks
);
2633 /* load_imsm_mpb - read matrix metadata
2634 * allocates super->mpb to be freed by free_imsm
2636 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
2638 unsigned long long dsize
;
2639 unsigned long long sectors
;
2641 struct imsm_super
*anchor
;
2644 get_dev_size(fd
, NULL
, &dsize
);
2648 Name
": %s: device to small for imsm\n",
2653 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
2656 Name
": Cannot seek to anchor block on %s: %s\n",
2657 devname
, strerror(errno
));
2661 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
2664 Name
": Failed to allocate imsm anchor buffer"
2665 " on %s\n", devname
);
2668 if (read(fd
, anchor
, 512) != 512) {
2671 Name
": Cannot read anchor block on %s: %s\n",
2672 devname
, strerror(errno
));
2677 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
2680 Name
": no IMSM anchor on %s\n", devname
);
2685 __free_imsm(super
, 0);
2686 /* reload capability and hba */
2688 /* capability and hba must be updated with new super allocation */
2689 find_intel_hba_capability(fd
, super
, devname
);
2690 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
2691 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
2694 Name
": unable to allocate %zu byte mpb buffer\n",
2699 memcpy(super
->buf
, anchor
, 512);
2701 sectors
= mpb_sectors(anchor
) - 1;
2704 check_sum
= __gen_imsm_checksum(super
->anchor
);
2705 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
2708 Name
": IMSM checksum %x != %x on %s\n",
2710 __le32_to_cpu(super
->anchor
->check_sum
),
2718 /* read the extended mpb */
2719 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
2722 Name
": Cannot seek to extended mpb on %s: %s\n",
2723 devname
, strerror(errno
));
2727 if ((unsigned)read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
2730 Name
": Cannot read extended mpb on %s: %s\n",
2731 devname
, strerror(errno
));
2735 check_sum
= __gen_imsm_checksum(super
->anchor
);
2736 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
2739 Name
": IMSM checksum %x != %x on %s\n",
2740 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
2745 /* FIXME the BBM log is disk specific so we cannot use this global
2746 * buffer for all disks. Ok for now since we only look at the global
2747 * bbm_log_size parameter to gate assembly
2749 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
2755 load_and_parse_mpb(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
2759 err
= load_imsm_mpb(fd
, super
, devname
);
2762 err
= load_imsm_disk(fd
, super
, devname
, keep_fd
);
2765 err
= parse_raid_devices(super
);
2770 static void __free_imsm_disk(struct dl
*d
)
2782 static void free_imsm_disks(struct intel_super
*super
)
2786 while (super
->disks
) {
2788 super
->disks
= d
->next
;
2789 __free_imsm_disk(d
);
2791 while (super
->disk_mgmt_list
) {
2792 d
= super
->disk_mgmt_list
;
2793 super
->disk_mgmt_list
= d
->next
;
2794 __free_imsm_disk(d
);
2796 while (super
->missing
) {
2798 super
->missing
= d
->next
;
2799 __free_imsm_disk(d
);
2804 /* free all the pieces hanging off of a super pointer */
2805 static void __free_imsm(struct intel_super
*super
, int free_disks
)
2807 struct intel_hba
*elem
, *next
;
2813 /* unlink capability description */
2816 free_imsm_disks(super
);
2817 free_devlist(super
);
2821 free((void *)elem
->path
);
2829 static void free_imsm(struct intel_super
*super
)
2831 __free_imsm(super
, 1);
2835 static void free_super_imsm(struct supertype
*st
)
2837 struct intel_super
*super
= st
->sb
;
2846 static struct intel_super
*alloc_super(void)
2848 struct intel_super
*super
= malloc(sizeof(*super
));
2851 memset(super
, 0, sizeof(*super
));
2852 super
->current_vol
= -1;
2853 super
->create_offset
= ~((__u32
) 0);
2859 * find and allocate hba and OROM/EFI based on valid fd of RAID component device
2861 static int find_intel_hba_capability(int fd
, struct intel_super
*super
, char *devname
)
2863 struct sys_dev
*hba_name
;
2866 if ((fd
< 0) || check_env("IMSM_NO_PLATFORM")) {
2871 hba_name
= find_disk_attached_hba(fd
, NULL
);
2875 Name
": %s is not attached to Intel(R) RAID controller.\n",
2879 rv
= attach_hba_to_super(super
, hba_name
);
2882 struct intel_hba
*hba
= super
->hba
;
2884 fprintf(stderr
, Name
": %s is attached to Intel(R) %s RAID "
2885 "controller (%s),\n"
2886 " but the container is assigned to Intel(R) "
2887 "%s RAID controller (",
2890 hba_name
->pci_id
? : "Err!",
2891 get_sys_dev_type(hba_name
->type
));
2894 fprintf(stderr
, "%s", hba
->pci_id
? : "Err!");
2896 fprintf(stderr
, ", ");
2900 fprintf(stderr
, ").\n"
2901 " Mixing devices attached to different controllers "
2902 "is not allowed.\n");
2904 free_sys_dev(&hba_name
);
2907 super
->orom
= find_imsm_capability(hba_name
->type
);
2908 free_sys_dev(&hba_name
);
2915 /* find_missing - helper routine for load_super_imsm_all that identifies
2916 * disks that have disappeared from the system. This routine relies on
2917 * the mpb being uptodate, which it is at load time.
2919 static int find_missing(struct intel_super
*super
)
2922 struct imsm_super
*mpb
= super
->anchor
;
2924 struct imsm_disk
*disk
;
2926 for (i
= 0; i
< mpb
->num_disks
; i
++) {
2927 disk
= __get_imsm_disk(mpb
, i
);
2928 dl
= serial_to_dl(disk
->serial
, super
);
2932 dl
= malloc(sizeof(*dl
));
2938 dl
->devname
= strdup("missing");
2940 serialcpy(dl
->serial
, disk
->serial
);
2943 dl
->next
= super
->missing
;
2944 super
->missing
= dl
;
2950 static struct intel_disk
*disk_list_get(__u8
*serial
, struct intel_disk
*disk_list
)
2952 struct intel_disk
*idisk
= disk_list
;
2955 if (serialcmp(idisk
->disk
.serial
, serial
) == 0)
2957 idisk
= idisk
->next
;
2963 static int __prep_thunderdome(struct intel_super
**table
, int tbl_size
,
2964 struct intel_super
*super
,
2965 struct intel_disk
**disk_list
)
2967 struct imsm_disk
*d
= &super
->disks
->disk
;
2968 struct imsm_super
*mpb
= super
->anchor
;
2971 for (i
= 0; i
< tbl_size
; i
++) {
2972 struct imsm_super
*tbl_mpb
= table
[i
]->anchor
;
2973 struct imsm_disk
*tbl_d
= &table
[i
]->disks
->disk
;
2975 if (tbl_mpb
->family_num
== mpb
->family_num
) {
2976 if (tbl_mpb
->check_sum
== mpb
->check_sum
) {
2977 dprintf("%s: mpb from %d:%d matches %d:%d\n",
2978 __func__
, super
->disks
->major
,
2979 super
->disks
->minor
,
2980 table
[i
]->disks
->major
,
2981 table
[i
]->disks
->minor
);
2985 if (((is_configured(d
) && !is_configured(tbl_d
)) ||
2986 is_configured(d
) == is_configured(tbl_d
)) &&
2987 tbl_mpb
->generation_num
< mpb
->generation_num
) {
2988 /* current version of the mpb is a
2989 * better candidate than the one in
2990 * super_table, but copy over "cross
2991 * generational" status
2993 struct intel_disk
*idisk
;
2995 dprintf("%s: mpb from %d:%d replaces %d:%d\n",
2996 __func__
, super
->disks
->major
,
2997 super
->disks
->minor
,
2998 table
[i
]->disks
->major
,
2999 table
[i
]->disks
->minor
);
3001 idisk
= disk_list_get(tbl_d
->serial
, *disk_list
);
3002 if (idisk
&& is_failed(&idisk
->disk
))
3003 tbl_d
->status
|= FAILED_DISK
;
3006 struct intel_disk
*idisk
;
3007 struct imsm_disk
*disk
;
3009 /* tbl_mpb is more up to date, but copy
3010 * over cross generational status before
3013 disk
= __serial_to_disk(d
->serial
, mpb
, NULL
);
3014 if (disk
&& is_failed(disk
))
3015 d
->status
|= FAILED_DISK
;
3017 idisk
= disk_list_get(d
->serial
, *disk_list
);
3020 if (disk
&& is_configured(disk
))
3021 idisk
->disk
.status
|= CONFIGURED_DISK
;
3024 dprintf("%s: mpb from %d:%d prefer %d:%d\n",
3025 __func__
, super
->disks
->major
,
3026 super
->disks
->minor
,
3027 table
[i
]->disks
->major
,
3028 table
[i
]->disks
->minor
);
3036 table
[tbl_size
++] = super
;
3040 /* update/extend the merged list of imsm_disk records */
3041 for (j
= 0; j
< mpb
->num_disks
; j
++) {
3042 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, j
);
3043 struct intel_disk
*idisk
;
3045 idisk
= disk_list_get(disk
->serial
, *disk_list
);
3047 idisk
->disk
.status
|= disk
->status
;
3048 if (is_configured(&idisk
->disk
) ||
3049 is_failed(&idisk
->disk
))
3050 idisk
->disk
.status
&= ~(SPARE_DISK
);
3052 idisk
= calloc(1, sizeof(*idisk
));
3055 idisk
->owner
= IMSM_UNKNOWN_OWNER
;
3056 idisk
->disk
= *disk
;
3057 idisk
->next
= *disk_list
;
3061 if (serialcmp(idisk
->disk
.serial
, d
->serial
) == 0)
3068 static struct intel_super
*
3069 validate_members(struct intel_super
*super
, struct intel_disk
*disk_list
,
3072 struct imsm_super
*mpb
= super
->anchor
;
3076 for (i
= 0; i
< mpb
->num_disks
; i
++) {
3077 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, i
);
3078 struct intel_disk
*idisk
;
3080 idisk
= disk_list_get(disk
->serial
, disk_list
);
3082 if (idisk
->owner
== owner
||
3083 idisk
->owner
== IMSM_UNKNOWN_OWNER
)
3086 dprintf("%s: '%.16s' owner %d != %d\n",
3087 __func__
, disk
->serial
, idisk
->owner
,
3090 dprintf("%s: unknown disk %x [%d]: %.16s\n",
3091 __func__
, __le32_to_cpu(mpb
->family_num
), i
,
3097 if (ok_count
== mpb
->num_disks
)
3102 static void show_conflicts(__u32 family_num
, struct intel_super
*super_list
)
3104 struct intel_super
*s
;
3106 for (s
= super_list
; s
; s
= s
->next
) {
3107 if (family_num
!= s
->anchor
->family_num
)
3109 fprintf(stderr
, "Conflict, offlining family %#x on '%s'\n",
3110 __le32_to_cpu(family_num
), s
->disks
->devname
);
3114 static struct intel_super
*
3115 imsm_thunderdome(struct intel_super
**super_list
, int len
)
3117 struct intel_super
*super_table
[len
];
3118 struct intel_disk
*disk_list
= NULL
;
3119 struct intel_super
*champion
, *spare
;
3120 struct intel_super
*s
, **del
;
3125 memset(super_table
, 0, sizeof(super_table
));
3126 for (s
= *super_list
; s
; s
= s
->next
)
3127 tbl_size
= __prep_thunderdome(super_table
, tbl_size
, s
, &disk_list
);
3129 for (i
= 0; i
< tbl_size
; i
++) {
3130 struct imsm_disk
*d
;
3131 struct intel_disk
*idisk
;
3132 struct imsm_super
*mpb
= super_table
[i
]->anchor
;
3135 d
= &s
->disks
->disk
;
3137 /* 'd' must appear in merged disk list for its
3138 * configuration to be valid
3140 idisk
= disk_list_get(d
->serial
, disk_list
);
3141 if (idisk
&& idisk
->owner
== i
)
3142 s
= validate_members(s
, disk_list
, i
);
3147 dprintf("%s: marking family: %#x from %d:%d offline\n",
3148 __func__
, mpb
->family_num
,
3149 super_table
[i
]->disks
->major
,
3150 super_table
[i
]->disks
->minor
);
3154 /* This is where the mdadm implementation differs from the Windows
3155 * driver which has no strict concept of a container. We can only
3156 * assemble one family from a container, so when returning a prodigal
3157 * array member to this system the code will not be able to disambiguate
3158 * the container contents that should be assembled ("foreign" versus
3159 * "local"). It requires user intervention to set the orig_family_num
3160 * to a new value to establish a new container. The Windows driver in
3161 * this situation fixes up the volume name in place and manages the
3162 * foreign array as an independent entity.
3167 for (i
= 0; i
< tbl_size
; i
++) {
3168 struct intel_super
*tbl_ent
= super_table
[i
];
3174 if (tbl_ent
->anchor
->num_raid_devs
== 0) {
3179 if (s
&& !is_spare
) {
3180 show_conflicts(tbl_ent
->anchor
->family_num
, *super_list
);
3182 } else if (!s
&& !is_spare
)
3195 fprintf(stderr
, "Chose family %#x on '%s', "
3196 "assemble conflicts to new container with '--update=uuid'\n",
3197 __le32_to_cpu(s
->anchor
->family_num
), s
->disks
->devname
);
3199 /* collect all dl's onto 'champion', and update them to
3200 * champion's version of the status
3202 for (s
= *super_list
; s
; s
= s
->next
) {
3203 struct imsm_super
*mpb
= champion
->anchor
;
3204 struct dl
*dl
= s
->disks
;
3209 for (i
= 0; i
< mpb
->num_disks
; i
++) {
3210 struct imsm_disk
*disk
;
3212 disk
= __serial_to_disk(dl
->serial
, mpb
, &dl
->index
);
3215 /* only set index on disks that are a member of
3216 * a populated contianer, i.e. one with
3219 if (is_failed(&dl
->disk
))
3221 else if (is_spare(&dl
->disk
))
3227 if (i
>= mpb
->num_disks
) {
3228 struct intel_disk
*idisk
;
3230 idisk
= disk_list_get(dl
->serial
, disk_list
);
3231 if (idisk
&& is_spare(&idisk
->disk
) &&
3232 !is_failed(&idisk
->disk
) && !is_configured(&idisk
->disk
))
3240 dl
->next
= champion
->disks
;
3241 champion
->disks
= dl
;
3245 /* delete 'champion' from super_list */
3246 for (del
= super_list
; *del
; ) {
3247 if (*del
== champion
) {
3248 *del
= (*del
)->next
;
3251 del
= &(*del
)->next
;
3253 champion
->next
= NULL
;
3257 struct intel_disk
*idisk
= disk_list
;
3259 disk_list
= disk_list
->next
;
3266 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
3270 struct intel_super
*super_list
= NULL
;
3271 struct intel_super
*super
= NULL
;
3272 int devnum
= fd2devnum(fd
);
3278 /* check if 'fd' an opened container */
3279 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
3283 if (sra
->array
.major_version
!= -1 ||
3284 sra
->array
.minor_version
!= -2 ||
3285 strcmp(sra
->text_version
, "imsm") != 0) {
3290 for (sd
= sra
->devs
, i
= 0; sd
; sd
= sd
->next
, i
++) {
3291 struct intel_super
*s
= alloc_super();
3299 s
->next
= super_list
;
3303 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
3304 dfd
= dev_open(nm
, O_RDWR
);
3308 rv
= find_intel_hba_capability(dfd
, s
, devname
);
3309 /* no orom/efi or non-intel hba of the disk */
3313 err
= load_and_parse_mpb(dfd
, s
, NULL
, 1);
3315 /* retry the load if we might have raced against mdmon */
3316 if (err
== 3 && mdmon_running(devnum
))
3317 for (retry
= 0; retry
< 3; retry
++) {
3319 err
= load_and_parse_mpb(dfd
, s
, NULL
, 1);
3327 /* all mpbs enter, maybe one leaves */
3328 super
= imsm_thunderdome(&super_list
, i
);
3334 if (find_missing(super
) != 0) {
3342 while (super_list
) {
3343 struct intel_super
*s
= super_list
;
3345 super_list
= super_list
->next
;
3354 st
->container_dev
= devnum
;
3355 if (err
== 0 && st
->ss
== NULL
) {
3356 st
->ss
= &super_imsm
;
3357 st
->minor_version
= 0;
3358 st
->max_devs
= IMSM_MAX_DEVICES
;
3363 static int load_container_imsm(struct supertype
*st
, int fd
, char *devname
)
3365 return load_super_imsm_all(st
, fd
, &st
->sb
, devname
);
3369 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
3371 struct intel_super
*super
;
3374 if (test_partition(fd
))
3375 /* IMSM not allowed on partitions */
3378 free_super_imsm(st
);
3380 super
= alloc_super();
3383 Name
": malloc of %zu failed.\n",
3387 /* Load hba and capabilities if they exist.
3388 * But do not preclude loading metadata in case capabilities or hba are
3389 * non-compliant and ignore_hw_compat is set.
3391 rv
= find_intel_hba_capability(fd
, super
, devname
);
3392 /* no orom/efi or non-intel hba of the disk */
3393 if ((rv
!= 0) && (st
->ignore_hw_compat
== 0)) {
3396 Name
": No OROM/EFI properties for %s\n", devname
);
3400 rv
= load_and_parse_mpb(fd
, super
, devname
, 0);
3405 Name
": Failed to load all information "
3406 "sections on %s\n", devname
);
3412 if (st
->ss
== NULL
) {
3413 st
->ss
= &super_imsm
;
3414 st
->minor_version
= 0;
3415 st
->max_devs
= IMSM_MAX_DEVICES
;
3420 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
3422 if (info
->level
== 1)
3424 return info
->chunk_size
>> 9;
3427 static __u32
info_to_num_data_stripes(mdu_array_info_t
*info
, int num_domains
)
3431 num_stripes
= (info
->size
* 2) / info_to_blocks_per_strip(info
);
3432 num_stripes
/= num_domains
;
3437 static __u32
info_to_blocks_per_member(mdu_array_info_t
*info
)
3439 if (info
->level
== 1)
3440 return info
->size
* 2;
3442 return (info
->size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
3445 static void imsm_update_version_info(struct intel_super
*super
)
3447 /* update the version and attributes */
3448 struct imsm_super
*mpb
= super
->anchor
;
3450 struct imsm_dev
*dev
;
3451 struct imsm_map
*map
;
3454 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3455 dev
= get_imsm_dev(super
, i
);
3456 map
= get_imsm_map(dev
, 0);
3457 if (__le32_to_cpu(dev
->size_high
) > 0)
3458 mpb
->attributes
|= MPB_ATTRIB_2TB
;
3460 /* FIXME detect when an array spans a port multiplier */
3462 mpb
->attributes
|= MPB_ATTRIB_PM
;
3465 if (mpb
->num_raid_devs
> 1 ||
3466 mpb
->attributes
!= MPB_ATTRIB_CHECKSUM_VERIFY
) {
3467 version
= MPB_VERSION_ATTRIBS
;
3468 switch (get_imsm_raid_level(map
)) {
3469 case 0: mpb
->attributes
|= MPB_ATTRIB_RAID0
; break;
3470 case 1: mpb
->attributes
|= MPB_ATTRIB_RAID1
; break;
3471 case 10: mpb
->attributes
|= MPB_ATTRIB_RAID10
; break;
3472 case 5: mpb
->attributes
|= MPB_ATTRIB_RAID5
; break;
3475 if (map
->num_members
>= 5)
3476 version
= MPB_VERSION_5OR6_DISK_ARRAY
;
3477 else if (dev
->status
== DEV_CLONE_N_GO
)
3478 version
= MPB_VERSION_CNG
;
3479 else if (get_imsm_raid_level(map
) == 5)
3480 version
= MPB_VERSION_RAID5
;
3481 else if (map
->num_members
>= 3)
3482 version
= MPB_VERSION_3OR4_DISK_ARRAY
;
3483 else if (get_imsm_raid_level(map
) == 1)
3484 version
= MPB_VERSION_RAID1
;
3486 version
= MPB_VERSION_RAID0
;
3488 strcpy(((char *) mpb
->sig
) + strlen(MPB_SIGNATURE
), version
);
3492 static int check_name(struct intel_super
*super
, char *name
, int quiet
)
3494 struct imsm_super
*mpb
= super
->anchor
;
3495 char *reason
= NULL
;
3498 if (strlen(name
) > MAX_RAID_SERIAL_LEN
)
3499 reason
= "must be 16 characters or less";
3501 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3502 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
3504 if (strncmp((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
) == 0) {
3505 reason
= "already exists";
3510 if (reason
&& !quiet
)
3511 fprintf(stderr
, Name
": imsm volume name %s\n", reason
);
3516 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
3517 unsigned long long size
, char *name
,
3518 char *homehost
, int *uuid
)
3520 /* We are creating a volume inside a pre-existing container.
3521 * so st->sb is already set.
3523 struct intel_super
*super
= st
->sb
;
3524 struct imsm_super
*mpb
= super
->anchor
;
3525 struct intel_dev
*dv
;
3526 struct imsm_dev
*dev
;
3527 struct imsm_vol
*vol
;
3528 struct imsm_map
*map
;
3529 int idx
= mpb
->num_raid_devs
;
3531 unsigned long long array_blocks
;
3532 size_t size_old
, size_new
;
3533 __u32 num_data_stripes
;
3535 if (super
->orom
&& mpb
->num_raid_devs
>= super
->orom
->vpa
) {
3536 fprintf(stderr
, Name
": This imsm-container already has the "
3537 "maximum of %d volumes\n", super
->orom
->vpa
);
3541 /* ensure the mpb is large enough for the new data */
3542 size_old
= __le32_to_cpu(mpb
->mpb_size
);
3543 size_new
= disks_to_mpb_size(info
->nr_disks
);
3544 if (size_new
> size_old
) {
3546 size_t size_round
= ROUND_UP(size_new
, 512);
3548 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
3549 fprintf(stderr
, Name
": could not allocate new mpb\n");
3552 memcpy(mpb_new
, mpb
, size_old
);
3555 super
->anchor
= mpb_new
;
3556 mpb
->mpb_size
= __cpu_to_le32(size_new
);
3557 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
3559 super
->current_vol
= idx
;
3560 /* when creating the first raid device in this container set num_disks
3561 * to zero, i.e. delete this spare and add raid member devices in
3562 * add_to_super_imsm_volume()
3564 if (super
->current_vol
== 0)
3567 if (!check_name(super
, name
, 0))
3569 dv
= malloc(sizeof(*dv
));
3571 fprintf(stderr
, Name
": failed to allocate device list entry\n");
3574 dev
= calloc(1, sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
3577 fprintf(stderr
, Name
": could not allocate raid device\n");
3581 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
3582 if (info
->level
== 1)
3583 array_blocks
= info_to_blocks_per_member(info
);
3585 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
3586 info
->layout
, info
->chunk_size
,
3588 /* round array size down to closest MB */
3589 array_blocks
= (array_blocks
>> SECT_PER_MB_SHIFT
) << SECT_PER_MB_SHIFT
;
3591 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
3592 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
3593 dev
->status
= (DEV_READ_COALESCING
| DEV_WRITE_COALESCING
);
3595 vol
->migr_state
= 0;
3596 set_migr_type(dev
, MIGR_INIT
);
3598 vol
->curr_migr_unit
= 0;
3599 map
= get_imsm_map(dev
, 0);
3600 map
->pba_of_lba0
= __cpu_to_le32(super
->create_offset
);
3601 map
->blocks_per_member
= __cpu_to_le32(info_to_blocks_per_member(info
));
3602 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
3603 map
->failed_disk_num
= ~0;
3604 map
->map_state
= info
->level
? IMSM_T_STATE_UNINITIALIZED
:
3605 IMSM_T_STATE_NORMAL
;
3608 if (info
->level
== 1 && info
->raid_disks
> 2) {
3611 fprintf(stderr
, Name
": imsm does not support more than 2 disks"
3612 "in a raid1 volume\n");
3616 map
->raid_level
= info
->level
;
3617 if (info
->level
== 10) {
3618 map
->raid_level
= 1;
3619 map
->num_domains
= info
->raid_disks
/ 2;
3620 } else if (info
->level
== 1)
3621 map
->num_domains
= info
->raid_disks
;
3623 map
->num_domains
= 1;
3625 num_data_stripes
= info_to_num_data_stripes(info
, map
->num_domains
);
3626 map
->num_data_stripes
= __cpu_to_le32(num_data_stripes
);
3628 map
->num_members
= info
->raid_disks
;
3629 for (i
= 0; i
< map
->num_members
; i
++) {
3630 /* initialized in add_to_super */
3631 set_imsm_ord_tbl_ent(map
, i
, IMSM_ORD_REBUILD
);
3633 mpb
->num_raid_devs
++;
3636 dv
->index
= super
->current_vol
;
3637 dv
->next
= super
->devlist
;
3638 super
->devlist
= dv
;
3640 imsm_update_version_info(super
);
3645 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
3646 unsigned long long size
, char *name
,
3647 char *homehost
, int *uuid
)
3649 /* This is primarily called by Create when creating a new array.
3650 * We will then get add_to_super called for each component, and then
3651 * write_init_super called to write it out to each device.
3652 * For IMSM, Create can create on fresh devices or on a pre-existing
3654 * To create on a pre-existing array a different method will be called.
3655 * This one is just for fresh drives.
3657 struct intel_super
*super
;
3658 struct imsm_super
*mpb
;
3663 return init_super_imsm_volume(st
, info
, size
, name
, homehost
, uuid
);
3666 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
3670 super
= alloc_super();
3671 if (super
&& posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
3676 fprintf(stderr
, Name
3677 ": %s could not allocate superblock\n", __func__
);
3680 memset(super
->buf
, 0, mpb_size
);
3682 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
3686 /* zeroing superblock */
3690 mpb
->attributes
= MPB_ATTRIB_CHECKSUM_VERIFY
;
3692 version
= (char *) mpb
->sig
;
3693 strcpy(version
, MPB_SIGNATURE
);
3694 version
+= strlen(MPB_SIGNATURE
);
3695 strcpy(version
, MPB_VERSION_RAID0
);
3701 static int add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
3702 int fd
, char *devname
)
3704 struct intel_super
*super
= st
->sb
;
3705 struct imsm_super
*mpb
= super
->anchor
;
3707 struct imsm_dev
*dev
;
3708 struct imsm_map
*map
;
3711 dev
= get_imsm_dev(super
, super
->current_vol
);
3712 map
= get_imsm_map(dev
, 0);
3714 if (! (dk
->state
& (1<<MD_DISK_SYNC
))) {
3715 fprintf(stderr
, Name
": %s: Cannot add spare devices to IMSM volume\n",
3721 /* we're doing autolayout so grab the pre-marked (in
3722 * validate_geometry) raid_disk
3724 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3725 if (dl
->raiddisk
== dk
->raid_disk
)
3728 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3729 if (dl
->major
== dk
->major
&&
3730 dl
->minor
== dk
->minor
)
3735 fprintf(stderr
, Name
": %s is not a member of the same container\n", devname
);
3739 /* add a pristine spare to the metadata */
3740 if (dl
->index
< 0) {
3741 dl
->index
= super
->anchor
->num_disks
;
3742 super
->anchor
->num_disks
++;
3744 /* Check the device has not already been added */
3745 slot
= get_imsm_disk_slot(map
, dl
->index
);
3747 (get_imsm_ord_tbl_ent(dev
, slot
, -1) & IMSM_ORD_REBUILD
) == 0) {
3748 fprintf(stderr
, Name
": %s has been included in this array twice\n",
3752 set_imsm_ord_tbl_ent(map
, dk
->number
, dl
->index
);
3753 dl
->disk
.status
= CONFIGURED_DISK
;
3755 /* if we are creating the first raid device update the family number */
3756 if (super
->current_vol
== 0) {
3758 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
3759 struct imsm_disk
*_disk
= __get_imsm_disk(mpb
, dl
->index
);
3761 if (!_dev
|| !_disk
) {
3762 fprintf(stderr
, Name
": BUG mpb setup error\n");
3768 sum
+= __gen_imsm_checksum(mpb
);
3769 mpb
->family_num
= __cpu_to_le32(sum
);
3770 mpb
->orig_family_num
= mpb
->family_num
;
3777 static int add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
3778 int fd
, char *devname
)
3780 struct intel_super
*super
= st
->sb
;
3782 unsigned long long size
;
3787 /* If we are on an RAID enabled platform check that the disk is
3788 * attached to the raid controller.
3789 * We do not need to test disks attachment for container based additions,
3790 * they shall be already tested when container was created/assembled.
3792 rv
= find_intel_hba_capability(fd
, super
, devname
);
3793 /* no orom/efi or non-intel hba of the disk */
3795 dprintf("capability: %p fd: %d ret: %d\n",
3796 super
->orom
, fd
, rv
);
3800 if (super
->current_vol
>= 0)
3801 return add_to_super_imsm_volume(st
, dk
, fd
, devname
);
3804 dd
= malloc(sizeof(*dd
));
3807 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
3810 memset(dd
, 0, sizeof(*dd
));
3811 dd
->major
= major(stb
.st_rdev
);
3812 dd
->minor
= minor(stb
.st_rdev
);
3814 dd
->devname
= devname
? strdup(devname
) : NULL
;
3817 dd
->action
= DISK_ADD
;
3818 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
3821 Name
": failed to retrieve scsi serial, aborting\n");
3826 get_dev_size(fd
, NULL
, &size
);
3828 serialcpy(dd
->disk
.serial
, dd
->serial
);
3829 dd
->disk
.total_blocks
= __cpu_to_le32(size
);
3830 dd
->disk
.status
= SPARE_DISK
;
3831 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
3832 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
3834 dd
->disk
.scsi_id
= __cpu_to_le32(0);
3836 if (st
->update_tail
) {
3837 dd
->next
= super
->disk_mgmt_list
;
3838 super
->disk_mgmt_list
= dd
;
3840 dd
->next
= super
->disks
;
3842 super
->updates_pending
++;
3849 static int remove_from_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
)
3851 struct intel_super
*super
= st
->sb
;
3854 /* remove from super works only in mdmon - for communication
3855 * manager - monitor. Check if communication memory buffer
3858 if (!st
->update_tail
) {
3860 Name
": %s shall be used in mdmon context only"
3861 "(line %d).\n", __func__
, __LINE__
);
3864 dd
= malloc(sizeof(*dd
));
3867 Name
": malloc failed %s:%d.\n", __func__
, __LINE__
);
3870 memset(dd
, 0, sizeof(*dd
));
3871 dd
->major
= dk
->major
;
3872 dd
->minor
= dk
->minor
;
3875 dd
->disk
.status
= SPARE_DISK
;
3876 dd
->action
= DISK_REMOVE
;
3878 dd
->next
= super
->disk_mgmt_list
;
3879 super
->disk_mgmt_list
= dd
;
3885 static int store_imsm_mpb(int fd
, struct imsm_super
*mpb
);
3889 struct imsm_super anchor
;
3890 } spare_record
__attribute__ ((aligned(512)));
3892 /* spare records have their own family number and do not have any defined raid
3895 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
3897 struct imsm_super
*mpb
= super
->anchor
;
3898 struct imsm_super
*spare
= &spare_record
.anchor
;
3902 spare
->mpb_size
= __cpu_to_le32(sizeof(struct imsm_super
)),
3903 spare
->generation_num
= __cpu_to_le32(1UL),
3904 spare
->attributes
= MPB_ATTRIB_CHECKSUM_VERIFY
;
3905 spare
->num_disks
= 1,
3906 spare
->num_raid_devs
= 0,
3907 spare
->cache_size
= mpb
->cache_size
,
3908 spare
->pwr_cycle_count
= __cpu_to_le32(1),
3910 snprintf((char *) spare
->sig
, MAX_SIGNATURE_LENGTH
,
3911 MPB_SIGNATURE MPB_VERSION_RAID0
);
3913 for (d
= super
->disks
; d
; d
= d
->next
) {
3917 spare
->disk
[0] = d
->disk
;
3918 sum
= __gen_imsm_checksum(spare
);
3919 spare
->family_num
= __cpu_to_le32(sum
);
3920 spare
->orig_family_num
= 0;
3921 sum
= __gen_imsm_checksum(spare
);
3922 spare
->check_sum
= __cpu_to_le32(sum
);
3924 if (store_imsm_mpb(d
->fd
, spare
)) {
3925 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
3926 __func__
, d
->major
, d
->minor
, strerror(errno
));
3938 static int write_super_imsm(struct supertype
*st
, int doclose
)
3940 struct intel_super
*super
= st
->sb
;
3941 struct imsm_super
*mpb
= super
->anchor
;
3947 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
3950 /* 'generation' is incremented everytime the metadata is written */
3951 generation
= __le32_to_cpu(mpb
->generation_num
);
3953 mpb
->generation_num
= __cpu_to_le32(generation
);
3955 /* fix up cases where previous mdadm releases failed to set
3958 if (mpb
->orig_family_num
== 0)
3959 mpb
->orig_family_num
= mpb
->family_num
;
3961 for (d
= super
->disks
; d
; d
= d
->next
) {
3965 mpb
->disk
[d
->index
] = d
->disk
;
3969 for (d
= super
->missing
; d
; d
= d
->next
) {
3970 mpb
->disk
[d
->index
] = d
->disk
;
3973 mpb
->num_disks
= num_disks
;
3974 mpb_size
+= sizeof(struct imsm_disk
) * mpb
->num_disks
;
3976 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
3977 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
3978 struct imsm_dev
*dev2
= get_imsm_dev(super
, i
);
3980 imsm_copy_dev(dev
, dev2
);
3981 mpb_size
+= sizeof_imsm_dev(dev
, 0);
3984 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
3985 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
3987 /* recalculate checksum */
3988 sum
= __gen_imsm_checksum(mpb
);
3989 mpb
->check_sum
= __cpu_to_le32(sum
);
3991 /* write the mpb for disks that compose raid devices */
3992 for (d
= super
->disks
; d
; d
= d
->next
) {
3995 if (store_imsm_mpb(d
->fd
, mpb
))
3996 fprintf(stderr
, "%s: failed for device %d:%d %s\n",
3997 __func__
, d
->major
, d
->minor
, strerror(errno
));
4005 return write_super_imsm_spares(super
, doclose
);
4011 static int create_array(struct supertype
*st
, int dev_idx
)
4014 struct imsm_update_create_array
*u
;
4015 struct intel_super
*super
= st
->sb
;
4016 struct imsm_dev
*dev
= get_imsm_dev(super
, dev_idx
);
4017 struct imsm_map
*map
= get_imsm_map(dev
, 0);
4018 struct disk_info
*inf
;
4019 struct imsm_disk
*disk
;
4022 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0) +
4023 sizeof(*inf
) * map
->num_members
;
4026 fprintf(stderr
, "%s: failed to allocate update buffer\n",
4031 u
->type
= update_create_array
;
4032 u
->dev_idx
= dev_idx
;
4033 imsm_copy_dev(&u
->dev
, dev
);
4034 inf
= get_disk_info(u
);
4035 for (i
= 0; i
< map
->num_members
; i
++) {
4036 int idx
= get_imsm_disk_idx(dev
, i
, -1);
4038 disk
= get_imsm_disk(super
, idx
);
4039 serialcpy(inf
[i
].serial
, disk
->serial
);
4041 append_metadata_update(st
, u
, len
);
4046 static int mgmt_disk(struct supertype
*st
)
4048 struct intel_super
*super
= st
->sb
;
4050 struct imsm_update_add_remove_disk
*u
;
4052 if (!super
->disk_mgmt_list
)
4058 fprintf(stderr
, "%s: failed to allocate update buffer\n",
4063 u
->type
= update_add_remove_disk
;
4064 append_metadata_update(st
, u
, len
);
4069 static int write_init_super_imsm(struct supertype
*st
)
4071 struct intel_super
*super
= st
->sb
;
4072 int current_vol
= super
->current_vol
;
4074 /* we are done with current_vol reset it to point st at the container */
4075 super
->current_vol
= -1;
4077 if (st
->update_tail
) {
4078 /* queue the recently created array / added disk
4079 * as a metadata update */
4082 /* determine if we are creating a volume or adding a disk */
4083 if (current_vol
< 0) {
4084 /* in the mgmt (add/remove) disk case we are running
4085 * in mdmon context, so don't close fd's
4087 return mgmt_disk(st
);
4089 rv
= create_array(st
, current_vol
);
4094 for (d
= super
->disks
; d
; d
= d
->next
)
4095 Kill(d
->devname
, NULL
, 0, 1, 1);
4096 return write_super_imsm(st
, 1);
4101 static int store_super_imsm(struct supertype
*st
, int fd
)
4103 struct intel_super
*super
= st
->sb
;
4104 struct imsm_super
*mpb
= super
? super
->anchor
: NULL
;
4110 return store_imsm_mpb(fd
, mpb
);
4116 static int imsm_bbm_log_size(struct imsm_super
*mpb
)
4118 return __le32_to_cpu(mpb
->bbm_log_size
);
4122 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
4123 int layout
, int raiddisks
, int chunk
,
4124 unsigned long long size
, char *dev
,
4125 unsigned long long *freesize
,
4129 unsigned long long ldsize
;
4130 struct intel_super
*super
=NULL
;
4133 if (level
!= LEVEL_CONTAINER
)
4138 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
4141 fprintf(stderr
, Name
": imsm: Cannot open %s: %s\n",
4142 dev
, strerror(errno
));
4145 if (!get_dev_size(fd
, dev
, &ldsize
)) {
4150 /* capabilities retrieve could be possible
4151 * note that there is no fd for the disks in array.
4153 super
= alloc_super();
4156 Name
": malloc of %zu failed.\n",
4162 rv
= find_intel_hba_capability(fd
, super
, verbose
? dev
: NULL
);
4166 fd2devname(fd
, str
);
4167 dprintf("validate_geometry_imsm_container: fd: %d %s orom: %p rv: %d raiddisk: %d\n",
4168 fd
, str
, super
->orom
, rv
, raiddisks
);
4170 /* no orom/efi or non-intel hba of the disk */
4176 if (super
->orom
&& raiddisks
> super
->orom
->tds
) {
4178 fprintf(stderr
, Name
": %d exceeds maximum number of"
4179 " platform supported disks: %d\n",
4180 raiddisks
, super
->orom
->tds
);
4186 *freesize
= avail_size_imsm(st
, ldsize
>> 9);
4192 static unsigned long long find_size(struct extent
*e
, int *idx
, int num_extents
)
4194 const unsigned long long base_start
= e
[*idx
].start
;
4195 unsigned long long end
= base_start
+ e
[*idx
].size
;
4198 if (base_start
== end
)
4202 for (i
= *idx
; i
< num_extents
; i
++) {
4203 /* extend overlapping extents */
4204 if (e
[i
].start
>= base_start
&&
4205 e
[i
].start
<= end
) {
4208 if (e
[i
].start
+ e
[i
].size
> end
)
4209 end
= e
[i
].start
+ e
[i
].size
;
4210 } else if (e
[i
].start
> end
) {
4216 return end
- base_start
;
4219 static unsigned long long merge_extents(struct intel_super
*super
, int sum_extents
)
4221 /* build a composite disk with all known extents and generate a new
4222 * 'maxsize' given the "all disks in an array must share a common start
4223 * offset" constraint
4225 struct extent
*e
= calloc(sum_extents
, sizeof(*e
));
4229 unsigned long long pos
;
4230 unsigned long long start
= 0;
4231 unsigned long long maxsize
;
4232 unsigned long reserve
;
4237 /* coalesce and sort all extents. also, check to see if we need to
4238 * reserve space between member arrays
4241 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
4244 for (i
= 0; i
< dl
->extent_cnt
; i
++)
4247 qsort(e
, sum_extents
, sizeof(*e
), cmp_extent
);
4252 while (i
< sum_extents
) {
4253 e
[j
].start
= e
[i
].start
;
4254 e
[j
].size
= find_size(e
, &i
, sum_extents
);
4256 if (e
[j
-1].size
== 0)
4265 unsigned long long esize
;
4267 esize
= e
[i
].start
- pos
;
4268 if (esize
>= maxsize
) {
4273 pos
= e
[i
].start
+ e
[i
].size
;
4275 } while (e
[i
-1].size
);
4281 /* FIXME assumes volume at offset 0 is the first volume in a
4284 if (start_extent
> 0)
4285 reserve
= IMSM_RESERVED_SECTORS
; /* gap between raid regions */
4289 if (maxsize
< reserve
)
4292 super
->create_offset
= ~((__u32
) 0);
4293 if (start
+ reserve
> super
->create_offset
)
4294 return 0; /* start overflows create_offset */
4295 super
->create_offset
= start
+ reserve
;
4297 return maxsize
- reserve
;
4300 static int is_raid_level_supported(const struct imsm_orom
*orom
, int level
, int raiddisks
)
4302 if (level
< 0 || level
== 6 || level
== 4)
4305 /* if we have an orom prevent invalid raid levels */
4308 case 0: return imsm_orom_has_raid0(orom
);
4311 return imsm_orom_has_raid1e(orom
);
4312 return imsm_orom_has_raid1(orom
) && raiddisks
== 2;
4313 case 10: return imsm_orom_has_raid10(orom
) && raiddisks
== 4;
4314 case 5: return imsm_orom_has_raid5(orom
) && raiddisks
> 2;
4317 return 1; /* not on an Intel RAID platform so anything goes */
4323 #define pr_vrb(fmt, arg...) (void) (verbose && fprintf(stderr, Name fmt, ##arg))
4325 * validate volume parameters with OROM/EFI capabilities
4328 validate_geometry_imsm_orom(struct intel_super
*super
, int level
, int layout
,
4329 int raiddisks
, int *chunk
, int verbose
)
4334 /* validate container capabilities */
4335 if (super
->orom
&& raiddisks
> super
->orom
->tds
) {
4337 fprintf(stderr
, Name
": %d exceeds maximum number of"
4338 " platform supported disks: %d\n",
4339 raiddisks
, super
->orom
->tds
);
4343 /* capabilities of OROM tested - copied from validate_geometry_imsm_volume */
4344 if (super
->orom
&& (!is_raid_level_supported(super
->orom
, level
,
4346 pr_vrb(": platform does not support raid%d with %d disk%s\n",
4347 level
, raiddisks
, raiddisks
> 1 ? "s" : "");
4350 if (super
->orom
&& level
!= 1) {
4351 if (chunk
&& (*chunk
== 0 || *chunk
== UnSet
))
4352 *chunk
= imsm_orom_default_chunk(super
->orom
);
4353 else if (chunk
&& !imsm_orom_has_chunk(super
->orom
, *chunk
)) {
4354 pr_vrb(": platform does not support a chunk size of: "
4359 if (layout
!= imsm_level_to_layout(level
)) {
4361 pr_vrb(": imsm raid 5 only supports the left-asymmetric layout\n");
4362 else if (level
== 10)
4363 pr_vrb(": imsm raid 10 only supports the n2 layout\n");
4365 pr_vrb(": imsm unknown layout %#x for this raid level %d\n",
4372 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
4373 * FIX ME add ahci details
4375 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
4376 int layout
, int raiddisks
, int *chunk
,
4377 unsigned long long size
, char *dev
,
4378 unsigned long long *freesize
,
4382 struct intel_super
*super
= st
->sb
;
4383 struct imsm_super
*mpb
= super
->anchor
;
4385 unsigned long long pos
= 0;
4386 unsigned long long maxsize
;
4390 /* We must have the container info already read in. */
4394 if (!validate_geometry_imsm_orom(super
, level
, layout
, raiddisks
, chunk
, verbose
)) {
4395 fprintf(stderr
, Name
": RAID gemetry validation failed. "
4396 "Cannot proceed with the action(s).\n");
4400 /* General test: make sure there is space for
4401 * 'raiddisks' device extents of size 'size' at a given
4404 unsigned long long minsize
= size
;
4405 unsigned long long start_offset
= MaxSector
;
4408 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
4409 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
4414 e
= get_extents(super
, dl
);
4417 unsigned long long esize
;
4418 esize
= e
[i
].start
- pos
;
4419 if (esize
>= minsize
)
4421 if (found
&& start_offset
== MaxSector
) {
4424 } else if (found
&& pos
!= start_offset
) {
4428 pos
= e
[i
].start
+ e
[i
].size
;
4430 } while (e
[i
-1].size
);
4435 if (dcnt
< raiddisks
) {
4437 fprintf(stderr
, Name
": imsm: Not enough "
4438 "devices with space for this array "
4446 /* This device must be a member of the set */
4447 if (stat(dev
, &stb
) < 0)
4449 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
4451 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
4452 if (dl
->major
== (int)major(stb
.st_rdev
) &&
4453 dl
->minor
== (int)minor(stb
.st_rdev
))
4458 fprintf(stderr
, Name
": %s is not in the "
4459 "same imsm set\n", dev
);
4461 } else if (super
->orom
&& dl
->index
< 0 && mpb
->num_raid_devs
) {
4462 /* If a volume is present then the current creation attempt
4463 * cannot incorporate new spares because the orom may not
4464 * understand this configuration (all member disks must be
4465 * members of each array in the container).
4467 fprintf(stderr
, Name
": %s is a spare and a volume"
4468 " is already defined for this container\n", dev
);
4469 fprintf(stderr
, Name
": The option-rom requires all member"
4470 " disks to be a member of all volumes\n");
4474 /* retrieve the largest free space block */
4475 e
= get_extents(super
, dl
);
4480 unsigned long long esize
;
4482 esize
= e
[i
].start
- pos
;
4483 if (esize
>= maxsize
)
4485 pos
= e
[i
].start
+ e
[i
].size
;
4487 } while (e
[i
-1].size
);
4492 fprintf(stderr
, Name
": unable to determine free space for: %s\n",
4496 if (maxsize
< size
) {
4498 fprintf(stderr
, Name
": %s not enough space (%llu < %llu)\n",
4499 dev
, maxsize
, size
);
4503 /* count total number of extents for merge */
4505 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
4507 i
+= dl
->extent_cnt
;
4509 maxsize
= merge_extents(super
, i
);
4510 if (maxsize
< size
|| maxsize
== 0) {
4512 fprintf(stderr
, Name
": not enough space after merge (%llu < %llu)\n",
4517 *freesize
= maxsize
;
4522 static int reserve_space(struct supertype
*st
, int raiddisks
,
4523 unsigned long long size
, int chunk
,
4524 unsigned long long *freesize
)
4526 struct intel_super
*super
= st
->sb
;
4527 struct imsm_super
*mpb
= super
->anchor
;
4532 unsigned long long maxsize
;
4533 unsigned long long minsize
;
4537 /* find the largest common start free region of the possible disks */
4541 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
4547 /* don't activate new spares if we are orom constrained
4548 * and there is already a volume active in the container
4550 if (super
->orom
&& dl
->index
< 0 && mpb
->num_raid_devs
)
4553 e
= get_extents(super
, dl
);
4556 for (i
= 1; e
[i
-1].size
; i
++)
4564 maxsize
= merge_extents(super
, extent_cnt
);
4568 minsize
= chunk
* 2;
4570 if (cnt
< raiddisks
||
4571 (super
->orom
&& used
&& used
!= raiddisks
) ||
4572 maxsize
< minsize
||
4574 fprintf(stderr
, Name
": not enough devices with space to create array.\n");
4575 return 0; /* No enough free spaces large enough */
4587 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
4589 dl
->raiddisk
= cnt
++;
4596 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
4597 int raiddisks
, int *chunk
, unsigned long long size
,
4598 char *dev
, unsigned long long *freesize
,
4606 * if given unused devices create a container
4607 * if given given devices in a container create a member volume
4609 if (level
== LEVEL_CONTAINER
) {
4610 /* Must be a fresh device to add to a container */
4611 return validate_geometry_imsm_container(st
, level
, layout
,
4613 chunk
?*chunk
:0, size
,
4619 if (st
->sb
&& freesize
) {
4620 /* we are being asked to automatically layout a
4621 * new volume based on the current contents of
4622 * the container. If the the parameters can be
4623 * satisfied reserve_space will record the disks,
4624 * start offset, and size of the volume to be
4625 * created. add_to_super and getinfo_super
4626 * detect when autolayout is in progress.
4628 if (!validate_geometry_imsm_orom(st
->sb
, level
, layout
,
4632 return reserve_space(st
, raiddisks
, size
,
4633 chunk
?*chunk
:0, freesize
);
4638 /* creating in a given container */
4639 return validate_geometry_imsm_volume(st
, level
, layout
,
4640 raiddisks
, chunk
, size
,
4641 dev
, freesize
, verbose
);
4644 /* This device needs to be a device in an 'imsm' container */
4645 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
4649 Name
": Cannot create this array on device %s\n",
4654 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
4656 fprintf(stderr
, Name
": Cannot open %s: %s\n",
4657 dev
, strerror(errno
));
4660 /* Well, it is in use by someone, maybe an 'imsm' container. */
4661 cfd
= open_container(fd
);
4665 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
4669 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
4670 if (sra
&& sra
->array
.major_version
== -1 &&
4671 strcmp(sra
->text_version
, "imsm") == 0)
4675 /* This is a member of a imsm container. Load the container
4676 * and try to create a volume
4678 struct intel_super
*super
;
4680 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
) == 0) {
4682 st
->container_dev
= fd2devnum(cfd
);
4684 return validate_geometry_imsm_volume(st
, level
, layout
,
4692 fprintf(stderr
, Name
": failed container membership check\n");
4698 static void default_geometry_imsm(struct supertype
*st
, int *level
, int *layout
, int *chunk
)
4700 struct intel_super
*super
= st
->sb
;
4702 if (level
&& *level
== UnSet
)
4703 *level
= LEVEL_CONTAINER
;
4705 if (level
&& layout
&& *layout
== UnSet
)
4706 *layout
= imsm_level_to_layout(*level
);
4708 if (chunk
&& (*chunk
== UnSet
|| *chunk
== 0) &&
4709 super
&& super
->orom
)
4710 *chunk
= imsm_orom_default_chunk(super
->orom
);
4713 static void handle_missing(struct intel_super
*super
, struct imsm_dev
*dev
);
4715 static int kill_subarray_imsm(struct supertype
*st
)
4717 /* remove the subarray currently referenced by ->current_vol */
4719 struct intel_dev
**dp
;
4720 struct intel_super
*super
= st
->sb
;
4721 __u8 current_vol
= super
->current_vol
;
4722 struct imsm_super
*mpb
= super
->anchor
;
4724 if (super
->current_vol
< 0)
4726 super
->current_vol
= -1; /* invalidate subarray cursor */
4728 /* block deletions that would change the uuid of active subarrays
4730 * FIXME when immutable ids are available, but note that we'll
4731 * also need to fixup the invalidated/active subarray indexes in
4734 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4737 if (i
< current_vol
)
4739 sprintf(subarray
, "%u", i
);
4740 if (is_subarray_active(subarray
, st
->devname
)) {
4742 Name
": deleting subarray-%d would change the UUID of active subarray-%d, aborting\n",
4749 if (st
->update_tail
) {
4750 struct imsm_update_kill_array
*u
= malloc(sizeof(*u
));
4754 u
->type
= update_kill_array
;
4755 u
->dev_idx
= current_vol
;
4756 append_metadata_update(st
, u
, sizeof(*u
));
4761 for (dp
= &super
->devlist
; *dp
;)
4762 if ((*dp
)->index
== current_vol
) {
4765 handle_missing(super
, (*dp
)->dev
);
4766 if ((*dp
)->index
> current_vol
)
4771 /* no more raid devices, all active components are now spares,
4772 * but of course failed are still failed
4774 if (--mpb
->num_raid_devs
== 0) {
4777 for (d
= super
->disks
; d
; d
= d
->next
)
4778 if (d
->index
> -2) {
4780 d
->disk
.status
= SPARE_DISK
;
4784 super
->updates_pending
++;
4789 static int update_subarray_imsm(struct supertype
*st
, char *subarray
,
4790 char *update
, struct mddev_ident
*ident
)
4792 /* update the subarray currently referenced by ->current_vol */
4793 struct intel_super
*super
= st
->sb
;
4794 struct imsm_super
*mpb
= super
->anchor
;
4796 if (strcmp(update
, "name") == 0) {
4797 char *name
= ident
->name
;
4801 if (is_subarray_active(subarray
, st
->devname
)) {
4803 Name
": Unable to update name of active subarray\n");
4807 if (!check_name(super
, name
, 0))
4810 vol
= strtoul(subarray
, &ep
, 10);
4811 if (*ep
!= '\0' || vol
>= super
->anchor
->num_raid_devs
)
4814 if (st
->update_tail
) {
4815 struct imsm_update_rename_array
*u
= malloc(sizeof(*u
));
4819 u
->type
= update_rename_array
;
4821 snprintf((char *) u
->name
, MAX_RAID_SERIAL_LEN
, "%s", name
);
4822 append_metadata_update(st
, u
, sizeof(*u
));
4824 struct imsm_dev
*dev
;
4827 dev
= get_imsm_dev(super
, vol
);
4828 snprintf((char *) dev
->volume
, MAX_RAID_SERIAL_LEN
, "%s", name
);
4829 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4830 dev
= get_imsm_dev(super
, i
);
4831 handle_missing(super
, dev
);
4833 super
->updates_pending
++;
4841 static int is_gen_migration(struct imsm_dev
*dev
)
4843 if (!dev
->vol
.migr_state
)
4846 if (migr_type(dev
) == MIGR_GEN_MIGR
)
4851 #endif /* MDASSEMBLE */
4853 static int is_rebuilding(struct imsm_dev
*dev
)
4855 struct imsm_map
*migr_map
;
4857 if (!dev
->vol
.migr_state
)
4860 if (migr_type(dev
) != MIGR_REBUILD
)
4863 migr_map
= get_imsm_map(dev
, 1);
4865 if (migr_map
->map_state
== IMSM_T_STATE_DEGRADED
)
4871 static void update_recovery_start(struct imsm_dev
*dev
, struct mdinfo
*array
)
4873 struct mdinfo
*rebuild
= NULL
;
4877 if (!is_rebuilding(dev
))
4880 /* Find the rebuild target, but punt on the dual rebuild case */
4881 for (d
= array
->devs
; d
; d
= d
->next
)
4882 if (d
->recovery_start
== 0) {
4889 /* (?) none of the disks are marked with
4890 * IMSM_ORD_REBUILD, so assume they are missing and the
4891 * disk_ord_tbl was not correctly updated
4893 dprintf("%s: failed to locate out-of-sync disk\n", __func__
);
4897 units
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
4898 rebuild
->recovery_start
= units
* blocks_per_migr_unit(dev
);
4902 static struct mdinfo
*container_content_imsm(struct supertype
*st
, char *subarray
)
4904 /* Given a container loaded by load_super_imsm_all,
4905 * extract information about all the arrays into
4907 * If 'subarray' is given, just extract info about that array.
4909 * For each imsm_dev create an mdinfo, fill it in,
4910 * then look for matching devices in super->disks
4911 * and create appropriate device mdinfo.
4913 struct intel_super
*super
= st
->sb
;
4914 struct imsm_super
*mpb
= super
->anchor
;
4915 struct mdinfo
*rest
= NULL
;
4919 int spare_disks
= 0;
4921 /* check for bad blocks */
4922 if (imsm_bbm_log_size(super
->anchor
))
4925 /* count spare devices, not used in maps
4927 for (d
= super
->disks
; d
; d
= d
->next
)
4931 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4932 struct imsm_dev
*dev
;
4933 struct imsm_map
*map
;
4934 struct imsm_map
*map2
;
4935 struct mdinfo
*this;
4940 (i
!= strtoul(subarray
, &ep
, 10) || *ep
!= '\0'))
4943 dev
= get_imsm_dev(super
, i
);
4944 map
= get_imsm_map(dev
, 0);
4945 map2
= get_imsm_map(dev
, 1);
4947 /* do not publish arrays that are in the middle of an
4948 * unsupported migration
4950 if (dev
->vol
.migr_state
&&
4951 (migr_type(dev
) == MIGR_STATE_CHANGE
)) {
4952 fprintf(stderr
, Name
": cannot assemble volume '%.16s':"
4953 " unsupported migration in progress\n",
4957 /* do not publish arrays that are not support by controller's
4961 chunk
= __le16_to_cpu(map
->blocks_per_strip
) >> 1;
4963 if (!validate_geometry_imsm_orom(super
,
4964 get_imsm_raid_level(map
), /* RAID level */
4965 imsm_level_to_layout(get_imsm_raid_level(map
)),
4966 map
->num_members
, /* raid disks */
4969 fprintf(stderr
, Name
": RAID gemetry validation failed. "
4970 "Cannot proceed with the action(s).\n");
4973 #endif /* MDASSEMBLE */
4974 this = malloc(sizeof(*this));
4976 fprintf(stderr
, Name
": failed to allocate %zu bytes\n",
4980 memset(this, 0, sizeof(*this));
4983 super
->current_vol
= i
;
4984 getinfo_super_imsm_volume(st
, this, NULL
);
4985 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
4986 unsigned long long recovery_start
;
4987 struct mdinfo
*info_d
;
4994 idx
= get_imsm_disk_idx(dev
, slot
, 0);
4995 ord
= get_imsm_ord_tbl_ent(dev
, slot
, -1);
4996 for (d
= super
->disks
; d
; d
= d
->next
)
4997 if (d
->index
== idx
)
5000 recovery_start
= MaxSector
;
5003 if (d
&& is_failed(&d
->disk
))
5005 if (ord
& IMSM_ORD_REBUILD
)
5009 * if we skip some disks the array will be assmebled degraded;
5010 * reset resync start to avoid a dirty-degraded
5011 * situation when performing the intial sync
5013 * FIXME handle dirty degraded
5015 if ((skip
|| recovery_start
== 0) && !dev
->vol
.dirty
)
5016 this->resync_start
= MaxSector
;
5020 info_d
= calloc(1, sizeof(*info_d
));
5022 fprintf(stderr
, Name
": failed to allocate disk"
5023 " for volume %.16s\n", dev
->volume
);
5024 info_d
= this->devs
;
5026 struct mdinfo
*d
= info_d
->next
;
5035 info_d
->next
= this->devs
;
5036 this->devs
= info_d
;
5038 info_d
->disk
.number
= d
->index
;
5039 info_d
->disk
.major
= d
->major
;
5040 info_d
->disk
.minor
= d
->minor
;
5041 info_d
->disk
.raid_disk
= slot
;
5042 info_d
->recovery_start
= recovery_start
;
5044 if (slot
< map2
->num_members
)
5045 info_d
->disk
.state
= (1 << MD_DISK_ACTIVE
);
5047 this->array
.spare_disks
++;
5049 if (slot
< map
->num_members
)
5050 info_d
->disk
.state
= (1 << MD_DISK_ACTIVE
);
5052 this->array
.spare_disks
++;
5054 if (info_d
->recovery_start
== MaxSector
)
5055 this->array
.working_disks
++;
5057 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
5058 info_d
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
5059 info_d
->component_size
= __le32_to_cpu(map
->blocks_per_member
);
5061 /* now that the disk list is up-to-date fixup recovery_start */
5062 update_recovery_start(dev
, this);
5063 this->array
.spare_disks
+= spare_disks
;
5067 /* if array has bad blocks, set suitable bit in array status */
5069 rest
->array
.state
|= (1<<MD_SB_BBM_ERRORS
);
5075 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
, int failed
)
5077 struct imsm_map
*map
= get_imsm_map(dev
, 0);
5080 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
5081 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
5083 switch (get_imsm_raid_level(map
)) {
5085 return IMSM_T_STATE_FAILED
;
5088 if (failed
< map
->num_members
)
5089 return IMSM_T_STATE_DEGRADED
;
5091 return IMSM_T_STATE_FAILED
;
5096 * check to see if any mirrors have failed, otherwise we
5097 * are degraded. Even numbered slots are mirrored on
5101 /* gcc -Os complains that this is unused */
5102 int insync
= insync
;
5104 for (i
= 0; i
< map
->num_members
; i
++) {
5105 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
, -1);
5106 int idx
= ord_to_idx(ord
);
5107 struct imsm_disk
*disk
;
5109 /* reset the potential in-sync count on even-numbered
5110 * slots. num_copies is always 2 for imsm raid10
5115 disk
= get_imsm_disk(super
, idx
);
5116 if (!disk
|| is_failed(disk
) || ord
& IMSM_ORD_REBUILD
)
5119 /* no in-sync disks left in this mirror the
5123 return IMSM_T_STATE_FAILED
;
5126 return IMSM_T_STATE_DEGRADED
;
5130 return IMSM_T_STATE_DEGRADED
;
5132 return IMSM_T_STATE_FAILED
;
5138 return map
->map_state
;
5141 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
)
5145 struct imsm_disk
*disk
;
5146 struct imsm_map
*map
= get_imsm_map(dev
, 0);
5147 struct imsm_map
*prev
= get_imsm_map(dev
, dev
->vol
.migr_state
);
5151 /* at the beginning of migration we set IMSM_ORD_REBUILD on
5152 * disks that are being rebuilt. New failures are recorded to
5153 * map[0]. So we look through all the disks we started with and
5154 * see if any failures are still present, or if any new ones
5157 * FIXME add support for online capacity expansion and
5158 * raid-level-migration
5160 for (i
= 0; i
< prev
->num_members
; i
++) {
5161 ord
= __le32_to_cpu(prev
->disk_ord_tbl
[i
]);
5162 ord
|= __le32_to_cpu(map
->disk_ord_tbl
[i
]);
5163 idx
= ord_to_idx(ord
);
5165 disk
= get_imsm_disk(super
, idx
);
5166 if (!disk
|| is_failed(disk
) || ord
& IMSM_ORD_REBUILD
)
5174 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
5177 struct intel_super
*super
= c
->sb
;
5178 struct imsm_super
*mpb
= super
->anchor
;
5180 if (atoi(inst
) >= mpb
->num_raid_devs
) {
5181 fprintf(stderr
, "%s: subarry index %d, out of range\n",
5182 __func__
, atoi(inst
));
5186 dprintf("imsm: open_new %s\n", inst
);
5187 a
->info
.container_member
= atoi(inst
);
5191 static int is_resyncing(struct imsm_dev
*dev
)
5193 struct imsm_map
*migr_map
;
5195 if (!dev
->vol
.migr_state
)
5198 if (migr_type(dev
) == MIGR_INIT
||
5199 migr_type(dev
) == MIGR_REPAIR
)
5202 if (migr_type(dev
) == MIGR_GEN_MIGR
)
5205 migr_map
= get_imsm_map(dev
, 1);
5207 if ((migr_map
->map_state
== IMSM_T_STATE_NORMAL
) &&
5208 (dev
->vol
.migr_type
!= MIGR_GEN_MIGR
))
5214 /* return true if we recorded new information */
5215 static int mark_failure(struct imsm_dev
*dev
, struct imsm_disk
*disk
, int idx
)
5219 struct imsm_map
*map
;
5221 /* new failures are always set in map[0] */
5222 map
= get_imsm_map(dev
, 0);
5224 slot
= get_imsm_disk_slot(map
, idx
);
5228 ord
= __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
5229 if (is_failed(disk
) && (ord
& IMSM_ORD_REBUILD
))
5232 disk
->status
|= FAILED_DISK
;
5233 set_imsm_ord_tbl_ent(map
, slot
, idx
| IMSM_ORD_REBUILD
);
5234 if (map
->failed_disk_num
== 0xff)
5235 map
->failed_disk_num
= slot
;
5239 static void mark_missing(struct imsm_dev
*dev
, struct imsm_disk
*disk
, int idx
)
5241 mark_failure(dev
, disk
, idx
);
5243 if (disk
->scsi_id
== __cpu_to_le32(~(__u32
)0))
5246 disk
->scsi_id
= __cpu_to_le32(~(__u32
)0);
5247 memmove(&disk
->serial
[0], &disk
->serial
[1], MAX_RAID_SERIAL_LEN
- 1);
5250 static void handle_missing(struct intel_super
*super
, struct imsm_dev
*dev
)
5256 if (!super
->missing
)
5258 failed
= imsm_count_failed(super
, dev
);
5259 map_state
= imsm_check_degraded(super
, dev
, failed
);
5261 dprintf("imsm: mark missing\n");
5262 end_migration(dev
, map_state
);
5263 for (dl
= super
->missing
; dl
; dl
= dl
->next
)
5264 mark_missing(dev
, &dl
->disk
, dl
->index
);
5265 super
->updates_pending
++;
5268 static unsigned long long imsm_set_array_size(struct imsm_dev
*dev
)
5270 int used_disks
= imsm_num_data_members(dev
, 0);
5271 unsigned long long array_blocks
;
5272 struct imsm_map
*map
;
5274 if (used_disks
== 0) {
5275 /* when problems occures
5276 * return current array_blocks value
5278 array_blocks
= __le32_to_cpu(dev
->size_high
);
5279 array_blocks
= array_blocks
<< 32;
5280 array_blocks
+= __le32_to_cpu(dev
->size_low
);
5282 return array_blocks
;
5285 /* set array size in metadata
5287 map
= get_imsm_map(dev
, 0);
5288 array_blocks
= map
->blocks_per_member
* used_disks
;
5290 /* round array size down to closest MB
5292 array_blocks
= (array_blocks
>> SECT_PER_MB_SHIFT
) << SECT_PER_MB_SHIFT
;
5293 dev
->size_low
= __cpu_to_le32((__u32
)array_blocks
);
5294 dev
->size_high
= __cpu_to_le32((__u32
)(array_blocks
>> 32));
5296 return array_blocks
;
5299 static void imsm_set_disk(struct active_array
*a
, int n
, int state
);
5301 static void imsm_progress_container_reshape(struct intel_super
*super
)
5303 /* if no device has a migr_state, but some device has a
5304 * different number of members than the previous device, start
5305 * changing the number of devices in this device to match
5308 struct imsm_super
*mpb
= super
->anchor
;
5309 int prev_disks
= -1;
5313 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
5314 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
5315 struct imsm_map
*map
= get_imsm_map(dev
, 0);
5316 struct imsm_map
*map2
;
5317 int prev_num_members
;
5319 if (dev
->vol
.migr_state
)
5322 if (prev_disks
== -1)
5323 prev_disks
= map
->num_members
;
5324 if (prev_disks
== map
->num_members
)
5327 /* OK, this array needs to enter reshape mode.
5328 * i.e it needs a migr_state
5331 copy_map_size
= sizeof_imsm_map(map
);
5332 prev_num_members
= map
->num_members
;
5333 map
->num_members
= prev_disks
;
5334 dev
->vol
.migr_state
= 1;
5335 dev
->vol
.curr_migr_unit
= 0;
5336 dev
->vol
.migr_type
= MIGR_GEN_MIGR
;
5337 for (i
= prev_num_members
;
5338 i
< map
->num_members
; i
++)
5339 set_imsm_ord_tbl_ent(map
, i
, i
);
5340 map2
= get_imsm_map(dev
, 1);
5341 /* Copy the current map */
5342 memcpy(map2
, map
, copy_map_size
);
5343 map2
->num_members
= prev_num_members
;
5345 imsm_set_array_size(dev
);
5346 super
->updates_pending
++;
5350 /* Handle dirty -> clean transititions, resync and reshape. Degraded and rebuild
5351 * states are handled in imsm_set_disk() with one exception, when a
5352 * resync is stopped due to a new failure this routine will set the
5353 * 'degraded' state for the array.
5355 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
5357 int inst
= a
->info
.container_member
;
5358 struct intel_super
*super
= a
->container
->sb
;
5359 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
5360 struct imsm_map
*map
= get_imsm_map(dev
, 0);
5361 int failed
= imsm_count_failed(super
, dev
);
5362 __u8 map_state
= imsm_check_degraded(super
, dev
, failed
);
5363 __u32 blocks_per_unit
;
5365 if (dev
->vol
.migr_state
&&
5366 dev
->vol
.migr_type
== MIGR_GEN_MIGR
) {
5367 /* array state change is blocked due to reshape action
5369 * - abort the reshape (if last_checkpoint is 0 and action!= reshape)
5370 * - finish the reshape (if last_checkpoint is big and action != reshape)
5371 * - update curr_migr_unit
5373 if (a
->curr_action
== reshape
) {
5374 /* still reshaping, maybe update curr_migr_unit */
5375 goto mark_checkpoint
;
5377 if (a
->last_checkpoint
== 0 && a
->prev_action
== reshape
) {
5378 /* for some reason we aborted the reshape.
5381 struct imsm_map
*map2
= get_imsm_map(dev
, 1);
5382 dev
->vol
.migr_state
= 0;
5383 dev
->vol
.migr_type
= 0;
5384 dev
->vol
.curr_migr_unit
= 0;
5385 memcpy(map
, map2
, sizeof_imsm_map(map2
));
5386 super
->updates_pending
++;
5388 if (a
->last_checkpoint
>= a
->info
.component_size
) {
5389 unsigned long long array_blocks
;
5393 used_disks
= imsm_num_data_members(dev
, 0);
5394 if (used_disks
> 0) {
5396 map
->blocks_per_member
*
5398 /* round array size down to closest MB
5400 array_blocks
= (array_blocks
5401 >> SECT_PER_MB_SHIFT
)
5402 << SECT_PER_MB_SHIFT
;
5403 a
->info
.custom_array_size
= array_blocks
;
5404 /* encourage manager to update array
5408 a
->check_reshape
= 1;
5410 /* finalize online capacity expansion/reshape */
5411 for (mdi
= a
->info
.devs
; mdi
; mdi
= mdi
->next
)
5413 mdi
->disk
.raid_disk
,
5416 imsm_progress_container_reshape(super
);
5421 /* before we activate this array handle any missing disks */
5422 if (consistent
== 2)
5423 handle_missing(super
, dev
);
5425 if (consistent
== 2 &&
5426 (!is_resync_complete(&a
->info
) ||
5427 map_state
!= IMSM_T_STATE_NORMAL
||
5428 dev
->vol
.migr_state
))
5431 if (is_resync_complete(&a
->info
)) {
5432 /* complete intialization / resync,
5433 * recovery and interrupted recovery is completed in
5436 if (is_resyncing(dev
)) {
5437 dprintf("imsm: mark resync done\n");
5438 end_migration(dev
, map_state
);
5439 super
->updates_pending
++;
5440 a
->last_checkpoint
= 0;
5442 } else if (!is_resyncing(dev
) && !failed
) {
5443 /* mark the start of the init process if nothing is failed */
5444 dprintf("imsm: mark resync start\n");
5445 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
)
5446 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_INIT
);
5448 migrate(dev
, IMSM_T_STATE_NORMAL
, MIGR_REPAIR
);
5449 super
->updates_pending
++;
5453 /* check if we can update curr_migr_unit from resync_start, recovery_start */
5454 blocks_per_unit
= blocks_per_migr_unit(dev
);
5455 if (blocks_per_unit
) {
5459 units
= a
->last_checkpoint
/ blocks_per_unit
;
5462 /* check that we did not overflow 32-bits, and that
5463 * curr_migr_unit needs updating
5465 if (units32
== units
&&
5466 __le32_to_cpu(dev
->vol
.curr_migr_unit
) != units32
) {
5467 dprintf("imsm: mark checkpoint (%u)\n", units32
);
5468 dev
->vol
.curr_migr_unit
= __cpu_to_le32(units32
);
5469 super
->updates_pending
++;
5473 /* mark dirty / clean */
5474 if (dev
->vol
.dirty
!= !consistent
) {
5475 dprintf("imsm: mark '%s'\n", consistent
? "clean" : "dirty");
5480 super
->updates_pending
++;
5486 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
5488 int inst
= a
->info
.container_member
;
5489 struct intel_super
*super
= a
->container
->sb
;
5490 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
5491 struct imsm_map
*map
= get_imsm_map(dev
, 0);
5492 struct imsm_disk
*disk
;
5497 if (n
> map
->num_members
)
5498 fprintf(stderr
, "imsm: set_disk %d out of range 0..%d\n",
5499 n
, map
->num_members
- 1);
5504 dprintf("imsm: set_disk %d:%x\n", n
, state
);
5506 ord
= get_imsm_ord_tbl_ent(dev
, n
, -1);
5507 disk
= get_imsm_disk(super
, ord_to_idx(ord
));
5509 /* check for new failures */
5510 if (state
& DS_FAULTY
) {
5511 if (mark_failure(dev
, disk
, ord_to_idx(ord
)))
5512 super
->updates_pending
++;
5515 /* check if in_sync */
5516 if (state
& DS_INSYNC
&& ord
& IMSM_ORD_REBUILD
&& is_rebuilding(dev
)) {
5517 struct imsm_map
*migr_map
= get_imsm_map(dev
, 1);
5519 set_imsm_ord_tbl_ent(migr_map
, n
, ord_to_idx(ord
));
5520 super
->updates_pending
++;
5523 failed
= imsm_count_failed(super
, dev
);
5524 map_state
= imsm_check_degraded(super
, dev
, failed
);
5526 /* check if recovery complete, newly degraded, or failed */
5527 if (map_state
== IMSM_T_STATE_NORMAL
&& is_rebuilding(dev
)) {
5528 end_migration(dev
, map_state
);
5529 map
= get_imsm_map(dev
, 0);
5530 map
->failed_disk_num
= ~0;
5531 super
->updates_pending
++;
5532 a
->last_checkpoint
= 0;
5533 } else if (map_state
== IMSM_T_STATE_DEGRADED
&&
5534 map
->map_state
!= map_state
&&
5535 !dev
->vol
.migr_state
) {
5536 dprintf("imsm: mark degraded\n");
5537 map
->map_state
= map_state
;
5538 super
->updates_pending
++;
5539 a
->last_checkpoint
= 0;
5540 } else if (map_state
== IMSM_T_STATE_FAILED
&&
5541 map
->map_state
!= map_state
) {
5542 dprintf("imsm: mark failed\n");
5543 end_migration(dev
, map_state
);
5544 super
->updates_pending
++;
5545 a
->last_checkpoint
= 0;
5546 } else if (is_gen_migration(dev
)) {
5547 dprintf("imsm: Detected General Migration in state: ");
5548 if (map_state
== IMSM_T_STATE_NORMAL
) {
5549 end_migration(dev
, map_state
);
5550 map
= get_imsm_map(dev
, 0);
5551 map
->failed_disk_num
= ~0;
5552 dprintf("normal\n");
5554 if (map_state
== IMSM_T_STATE_DEGRADED
) {
5555 printf("degraded\n");
5556 end_migration(dev
, map_state
);
5558 dprintf("failed\n");
5560 map
->map_state
= map_state
;
5562 super
->updates_pending
++;
5566 static int store_imsm_mpb(int fd
, struct imsm_super
*mpb
)
5569 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
5570 unsigned long long dsize
;
5571 unsigned long long sectors
;
5573 get_dev_size(fd
, NULL
, &dsize
);
5575 if (mpb_size
> 512) {
5576 /* -1 to account for anchor */
5577 sectors
= mpb_sectors(mpb
) - 1;
5579 /* write the extended mpb to the sectors preceeding the anchor */
5580 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
5583 if ((unsigned long long)write(fd
, buf
+ 512, 512 * sectors
)
5588 /* first block is stored on second to last sector of the disk */
5589 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
5592 if (write(fd
, buf
, 512) != 512)
5598 static void imsm_sync_metadata(struct supertype
*container
)
5600 struct intel_super
*super
= container
->sb
;
5602 dprintf("sync metadata: %d\n", super
->updates_pending
);
5603 if (!super
->updates_pending
)
5606 write_super_imsm(container
, 0);
5608 super
->updates_pending
= 0;
5611 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
5613 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
5614 int i
= get_imsm_disk_idx(dev
, idx
, -1);
5617 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
5621 if (dl
&& is_failed(&dl
->disk
))
5625 dprintf("%s: found %x:%x\n", __func__
, dl
->major
, dl
->minor
);
5630 static struct dl
*imsm_add_spare(struct intel_super
*super
, int slot
,
5631 struct active_array
*a
, int activate_new
,
5632 struct mdinfo
*additional_test_list
)
5634 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
5635 int idx
= get_imsm_disk_idx(dev
, slot
, -1);
5636 struct imsm_super
*mpb
= super
->anchor
;
5637 struct imsm_map
*map
;
5638 unsigned long long pos
;
5643 __u32 array_start
= 0;
5644 __u32 array_end
= 0;
5646 struct mdinfo
*test_list
;
5648 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
5649 /* If in this array, skip */
5650 for (d
= a
->info
.devs
; d
; d
= d
->next
)
5651 if (d
->state_fd
>= 0 &&
5652 d
->disk
.major
== dl
->major
&&
5653 d
->disk
.minor
== dl
->minor
) {
5654 dprintf("%x:%x already in array\n",
5655 dl
->major
, dl
->minor
);
5660 test_list
= additional_test_list
;
5662 if (test_list
->disk
.major
== dl
->major
&&
5663 test_list
->disk
.minor
== dl
->minor
) {
5664 dprintf("%x:%x already in additional test list\n",
5665 dl
->major
, dl
->minor
);
5668 test_list
= test_list
->next
;
5673 /* skip in use or failed drives */
5674 if (is_failed(&dl
->disk
) || idx
== dl
->index
||
5676 dprintf("%x:%x status (failed: %d index: %d)\n",
5677 dl
->major
, dl
->minor
, is_failed(&dl
->disk
), idx
);
5681 /* skip pure spares when we are looking for partially
5682 * assimilated drives
5684 if (dl
->index
== -1 && !activate_new
)
5687 /* Does this unused device have the requisite free space?
5688 * It needs to be able to cover all member volumes
5690 ex
= get_extents(super
, dl
);
5692 dprintf("cannot get extents\n");
5695 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
5696 dev
= get_imsm_dev(super
, i
);
5697 map
= get_imsm_map(dev
, 0);
5699 /* check if this disk is already a member of
5702 if (get_imsm_disk_slot(map
, dl
->index
) >= 0)
5708 array_start
= __le32_to_cpu(map
->pba_of_lba0
);
5709 array_end
= array_start
+
5710 __le32_to_cpu(map
->blocks_per_member
) - 1;
5713 /* check that we can start at pba_of_lba0 with
5714 * blocks_per_member of space
5716 if (array_start
>= pos
&& array_end
< ex
[j
].start
) {
5720 pos
= ex
[j
].start
+ ex
[j
].size
;
5722 } while (ex
[j
-1].size
);
5729 if (i
< mpb
->num_raid_devs
) {
5730 dprintf("%x:%x does not have %u to %u available\n",
5731 dl
->major
, dl
->minor
, array_start
, array_end
);
5742 static int imsm_rebuild_allowed(struct supertype
*cont
, int dev_idx
, int failed
)
5744 struct imsm_dev
*dev2
;
5745 struct imsm_map
*map
;
5751 dev2
= get_imsm_dev(cont
->sb
, dev_idx
);
5753 state
= imsm_check_degraded(cont
->sb
, dev2
, failed
);
5754 if (state
== IMSM_T_STATE_FAILED
) {
5755 map
= get_imsm_map(dev2
, 0);
5758 for (slot
= 0; slot
< map
->num_members
; slot
++) {
5760 * Check if failed disks are deleted from intel
5761 * disk list or are marked to be deleted
5763 idx
= get_imsm_disk_idx(dev2
, slot
, -1);
5764 idisk
= get_imsm_dl_disk(cont
->sb
, idx
);
5766 * Do not rebuild the array if failed disks
5767 * from failed sub-array are not removed from
5771 is_failed(&idisk
->disk
) &&
5772 (idisk
->action
!= DISK_REMOVE
))
5780 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
5781 struct metadata_update
**updates
)
5784 * Find a device with unused free space and use it to replace a
5785 * failed/vacant region in an array. We replace failed regions one a
5786 * array at a time. The result is that a new spare disk will be added
5787 * to the first failed array and after the monitor has finished
5788 * propagating failures the remainder will be consumed.
5790 * FIXME add a capability for mdmon to request spares from another
5794 struct intel_super
*super
= a
->container
->sb
;
5795 int inst
= a
->info
.container_member
;
5796 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
5797 struct imsm_map
*map
= get_imsm_map(dev
, 0);
5798 int failed
= a
->info
.array
.raid_disks
;
5799 struct mdinfo
*rv
= NULL
;
5802 struct metadata_update
*mu
;
5804 struct imsm_update_activate_spare
*u
;
5809 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
5810 if ((d
->curr_state
& DS_FAULTY
) &&
5812 /* wait for Removal to happen */
5814 if (d
->state_fd
>= 0)
5818 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
5819 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
5821 if (dev
->vol
.migr_state
&&
5822 dev
->vol
.migr_type
== MIGR_GEN_MIGR
)
5823 /* No repair during migration */
5826 if (a
->info
.array
.level
== 4)
5827 /* No repair for takeovered array
5828 * imsm doesn't support raid4
5832 if (imsm_check_degraded(super
, dev
, failed
) != IMSM_T_STATE_DEGRADED
)
5836 * If there are any failed disks check state of the other volume.
5837 * Block rebuild if the another one is failed until failed disks
5838 * are removed from container.
5841 dprintf("found failed disks in %s, check if there another"
5842 "failed sub-array.\n",
5844 /* check if states of the other volumes allow for rebuild */
5845 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
5847 allowed
= imsm_rebuild_allowed(a
->container
,
5855 /* For each slot, if it is not working, find a spare */
5856 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
5857 for (d
= a
->info
.devs
; d
; d
= d
->next
)
5858 if (d
->disk
.raid_disk
== i
)
5860 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
5861 if (d
&& (d
->state_fd
>= 0))
5865 * OK, this device needs recovery. Try to re-add the
5866 * previous occupant of this slot, if this fails see if
5867 * we can continue the assimilation of a spare that was
5868 * partially assimilated, finally try to activate a new
5871 dl
= imsm_readd(super
, i
, a
);
5873 dl
= imsm_add_spare(super
, i
, a
, 0, NULL
);
5875 dl
= imsm_add_spare(super
, i
, a
, 1, NULL
);
5879 /* found a usable disk with enough space */
5880 di
= malloc(sizeof(*di
));
5883 memset(di
, 0, sizeof(*di
));
5885 /* dl->index will be -1 in the case we are activating a
5886 * pristine spare. imsm_process_update() will create a
5887 * new index in this case. Once a disk is found to be
5888 * failed in all member arrays it is kicked from the
5891 di
->disk
.number
= dl
->index
;
5893 /* (ab)use di->devs to store a pointer to the device
5896 di
->devs
= (struct mdinfo
*) dl
;
5898 di
->disk
.raid_disk
= i
;
5899 di
->disk
.major
= dl
->major
;
5900 di
->disk
.minor
= dl
->minor
;
5902 di
->recovery_start
= 0;
5903 di
->data_offset
= __le32_to_cpu(map
->pba_of_lba0
);
5904 di
->component_size
= a
->info
.component_size
;
5905 di
->container_member
= inst
;
5906 super
->random
= random32();
5910 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
5911 i
, di
->data_offset
);
5917 /* No spares found */
5919 /* Now 'rv' has a list of devices to return.
5920 * Create a metadata_update record to update the
5921 * disk_ord_tbl for the array
5923 mu
= malloc(sizeof(*mu
));
5925 mu
->buf
= malloc(sizeof(struct imsm_update_activate_spare
) * num_spares
);
5926 if (mu
->buf
== NULL
) {
5933 struct mdinfo
*n
= rv
->next
;
5942 mu
->space_list
= NULL
;
5943 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
5944 mu
->next
= *updates
;
5945 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
5947 for (di
= rv
; di
; di
= di
->next
) {
5948 u
->type
= update_activate_spare
;
5949 u
->dl
= (struct dl
*) di
->devs
;
5951 u
->slot
= di
->disk
.raid_disk
;
5962 static int disks_overlap(struct intel_super
*super
, int idx
, struct imsm_update_create_array
*u
)
5964 struct imsm_dev
*dev
= get_imsm_dev(super
, idx
);
5965 struct imsm_map
*map
= get_imsm_map(dev
, 0);
5966 struct imsm_map
*new_map
= get_imsm_map(&u
->dev
, 0);
5967 struct disk_info
*inf
= get_disk_info(u
);
5968 struct imsm_disk
*disk
;
5972 for (i
= 0; i
< map
->num_members
; i
++) {
5973 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
, -1));
5974 for (j
= 0; j
< new_map
->num_members
; j
++)
5975 if (serialcmp(disk
->serial
, inf
[j
].serial
) == 0)
5983 static struct dl
*get_disk_super(struct intel_super
*super
, int major
, int minor
)
5985 struct dl
*dl
= NULL
;
5986 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
5987 if ((dl
->major
== major
) && (dl
->minor
== minor
))
5992 static int remove_disk_super(struct intel_super
*super
, int major
, int minor
)
5994 struct dl
*prev
= NULL
;
5998 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
5999 if ((dl
->major
== major
) && (dl
->minor
== minor
)) {
6002 prev
->next
= dl
->next
;
6004 super
->disks
= dl
->next
;
6006 __free_imsm_disk(dl
);
6007 dprintf("%s: removed %x:%x\n",
6008 __func__
, major
, minor
);
6016 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, unsigned index
);
6018 static int add_remove_disk_update(struct intel_super
*super
)
6020 int check_degraded
= 0;
6021 struct dl
*disk
= NULL
;
6022 /* add/remove some spares to/from the metadata/contrainer */
6023 while (super
->disk_mgmt_list
) {
6024 struct dl
*disk_cfg
;
6026 disk_cfg
= super
->disk_mgmt_list
;
6027 super
->disk_mgmt_list
= disk_cfg
->next
;
6028 disk_cfg
->next
= NULL
;
6030 if (disk_cfg
->action
== DISK_ADD
) {
6031 disk_cfg
->next
= super
->disks
;
6032 super
->disks
= disk_cfg
;
6034 dprintf("%s: added %x:%x\n",
6035 __func__
, disk_cfg
->major
,
6037 } else if (disk_cfg
->action
== DISK_REMOVE
) {
6038 dprintf("Disk remove action processed: %x.%x\n",
6039 disk_cfg
->major
, disk_cfg
->minor
);
6040 disk
= get_disk_super(super
,
6044 /* store action status */
6045 disk
->action
= DISK_REMOVE
;
6046 /* remove spare disks only */
6047 if (disk
->index
== -1) {
6048 remove_disk_super(super
,
6053 /* release allocate disk structure */
6054 __free_imsm_disk(disk_cfg
);
6057 return check_degraded
;
6060 static int apply_reshape_container_disks_update(struct imsm_update_reshape
*u
,
6061 struct intel_super
*super
,
6064 struct dl
*new_disk
;
6065 struct intel_dev
*id
;
6067 int delta_disks
= u
->new_raid_disks
- u
->old_raid_disks
;
6068 int disk_count
= u
->old_raid_disks
;
6069 void **tofree
= NULL
;
6070 int devices_to_reshape
= 1;
6071 struct imsm_super
*mpb
= super
->anchor
;
6073 unsigned int dev_id
;
6075 dprintf("imsm: apply_reshape_container_disks_update()\n");
6077 /* enable spares to use in array */
6078 for (i
= 0; i
< delta_disks
; i
++) {
6079 new_disk
= get_disk_super(super
,
6080 major(u
->new_disks
[i
]),
6081 minor(u
->new_disks
[i
]));
6082 dprintf("imsm: new disk for reshape is: %i:%i "
6083 "(%p, index = %i)\n",
6084 major(u
->new_disks
[i
]), minor(u
->new_disks
[i
]),
6085 new_disk
, new_disk
->index
);
6086 if ((new_disk
== NULL
) ||
6087 ((new_disk
->index
>= 0) &&
6088 (new_disk
->index
< u
->old_raid_disks
)))
6089 goto update_reshape_exit
;
6090 new_disk
->index
= disk_count
++;
6091 /* slot to fill in autolayout
6093 new_disk
->raiddisk
= new_disk
->index
;
6094 new_disk
->disk
.status
|=
6096 new_disk
->disk
.status
&= ~SPARE_DISK
;
6099 dprintf("imsm: volume set mpb->num_raid_devs = %i\n",
6100 mpb
->num_raid_devs
);
6101 /* manage changes in volume
6103 for (dev_id
= 0; dev_id
< mpb
->num_raid_devs
; dev_id
++) {
6104 void **sp
= *space_list
;
6105 struct imsm_dev
*newdev
;
6106 struct imsm_map
*newmap
, *oldmap
;
6108 for (id
= super
->devlist
; id
; id
= id
->next
) {
6109 if (id
->index
== dev_id
)
6118 /* Copy the dev, but not (all of) the map */
6119 memcpy(newdev
, id
->dev
, sizeof(*newdev
));
6120 oldmap
= get_imsm_map(id
->dev
, 0);
6121 newmap
= get_imsm_map(newdev
, 0);
6122 /* Copy the current map */
6123 memcpy(newmap
, oldmap
, sizeof_imsm_map(oldmap
));
6124 /* update one device only
6126 if (devices_to_reshape
) {
6127 dprintf("imsm: modifying subdev: %i\n",
6129 devices_to_reshape
--;
6130 newdev
->vol
.migr_state
= 1;
6131 newdev
->vol
.curr_migr_unit
= 0;
6132 newdev
->vol
.migr_type
= MIGR_GEN_MIGR
;
6133 newmap
->num_members
= u
->new_raid_disks
;
6134 for (i
= 0; i
< delta_disks
; i
++) {
6135 set_imsm_ord_tbl_ent(newmap
,
6136 u
->old_raid_disks
+ i
,
6137 u
->old_raid_disks
+ i
);
6139 /* New map is correct, now need to save old map
6141 newmap
= get_imsm_map(newdev
, 1);
6142 memcpy(newmap
, oldmap
, sizeof_imsm_map(oldmap
));
6144 imsm_set_array_size(newdev
);
6147 sp
= (void **)id
->dev
;
6153 *space_list
= tofree
;
6156 update_reshape_exit
:
6161 static int apply_takeover_update(struct imsm_update_takeover
*u
,
6162 struct intel_super
*super
,
6165 struct imsm_dev
*dev
= NULL
;
6166 struct intel_dev
*dv
;
6167 struct imsm_dev
*dev_new
;
6168 struct imsm_map
*map
;
6172 for (dv
= super
->devlist
; dv
; dv
= dv
->next
)
6173 if (dv
->index
== (unsigned int)u
->subarray
) {
6181 map
= get_imsm_map(dev
, 0);
6183 if (u
->direction
== R10_TO_R0
) {
6184 /* Number of failed disks must be half of initial disk number */
6185 if (imsm_count_failed(super
, dev
) != (map
->num_members
/ 2))
6188 /* iterate through devices to mark removed disks as spare */
6189 for (dm
= super
->disks
; dm
; dm
= dm
->next
) {
6190 if (dm
->disk
.status
& FAILED_DISK
) {
6191 int idx
= dm
->index
;
6192 /* update indexes on the disk list */
6193 /* FIXME this loop-with-the-loop looks wrong, I'm not convinced
6194 the index values will end up being correct.... NB */
6195 for (du
= super
->disks
; du
; du
= du
->next
)
6196 if (du
->index
> idx
)
6198 /* mark as spare disk */
6199 dm
->disk
.status
= SPARE_DISK
;
6204 map
->num_members
= map
->num_members
/ 2;
6205 map
->map_state
= IMSM_T_STATE_NORMAL
;
6206 map
->num_domains
= 1;
6207 map
->raid_level
= 0;
6208 map
->failed_disk_num
= -1;
6211 if (u
->direction
== R0_TO_R10
) {
6213 /* update slots in current disk list */
6214 for (dm
= super
->disks
; dm
; dm
= dm
->next
) {
6218 /* create new *missing* disks */
6219 for (i
= 0; i
< map
->num_members
; i
++) {
6220 space
= *space_list
;
6223 *space_list
= *space
;
6225 memcpy(du
, super
->disks
, sizeof(*du
));
6229 du
->index
= (i
* 2) + 1;
6230 sprintf((char *)du
->disk
.serial
,
6231 " MISSING_%d", du
->index
);
6232 sprintf((char *)du
->serial
,
6233 "MISSING_%d", du
->index
);
6234 du
->next
= super
->missing
;
6235 super
->missing
= du
;
6237 /* create new dev and map */
6238 space
= *space_list
;
6241 *space_list
= *space
;
6242 dev_new
= (void *)space
;
6243 memcpy(dev_new
, dev
, sizeof(*dev
));
6244 /* update new map */
6245 map
= get_imsm_map(dev_new
, 0);
6246 map
->num_members
= map
->num_members
* 2;
6247 map
->map_state
= IMSM_T_STATE_DEGRADED
;
6248 map
->num_domains
= 2;
6249 map
->raid_level
= 1;
6250 /* replace dev<->dev_new */
6253 /* update disk order table */
6254 for (du
= super
->disks
; du
; du
= du
->next
)
6256 set_imsm_ord_tbl_ent(map
, du
->index
, du
->index
);
6257 for (du
= super
->missing
; du
; du
= du
->next
)
6258 if (du
->index
>= 0) {
6259 set_imsm_ord_tbl_ent(map
, du
->index
, du
->index
);
6260 mark_missing(dev_new
, &du
->disk
, du
->index
);
6266 static void imsm_process_update(struct supertype
*st
,
6267 struct metadata_update
*update
)
6270 * crack open the metadata_update envelope to find the update record
6271 * update can be one of:
6272 * update_reshape_container_disks - all the arrays in the container
6273 * are being reshaped to have more devices. We need to mark
6274 * the arrays for general migration and convert selected spares
6275 * into active devices.
6276 * update_activate_spare - a spare device has replaced a failed
6277 * device in an array, update the disk_ord_tbl. If this disk is
6278 * present in all member arrays then also clear the SPARE_DISK
6280 * update_create_array
6282 * update_rename_array
6283 * update_add_remove_disk
6285 struct intel_super
*super
= st
->sb
;
6286 struct imsm_super
*mpb
;
6287 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
6289 /* update requires a larger buf but the allocation failed */
6290 if (super
->next_len
&& !super
->next_buf
) {
6291 super
->next_len
= 0;
6295 if (super
->next_buf
) {
6296 memcpy(super
->next_buf
, super
->buf
, super
->len
);
6298 super
->len
= super
->next_len
;
6299 super
->buf
= super
->next_buf
;
6301 super
->next_len
= 0;
6302 super
->next_buf
= NULL
;
6305 mpb
= super
->anchor
;
6308 case update_takeover
: {
6309 struct imsm_update_takeover
*u
= (void *)update
->buf
;
6310 if (apply_takeover_update(u
, super
, &update
->space_list
)) {
6311 imsm_update_version_info(super
);
6312 super
->updates_pending
++;
6317 case update_reshape_container_disks
: {
6318 struct imsm_update_reshape
*u
= (void *)update
->buf
;
6319 if (apply_reshape_container_disks_update(
6320 u
, super
, &update
->space_list
))
6321 super
->updates_pending
++;
6324 case update_activate_spare
: {
6325 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
6326 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
6327 struct imsm_map
*map
= get_imsm_map(dev
, 0);
6328 struct imsm_map
*migr_map
;
6329 struct active_array
*a
;
6330 struct imsm_disk
*disk
;
6335 int victim
= get_imsm_disk_idx(dev
, u
->slot
, -1);
6338 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
6343 fprintf(stderr
, "error: imsm_activate_spare passed "
6344 "an unknown disk (index: %d)\n",
6349 super
->updates_pending
++;
6351 /* count failures (excluding rebuilds and the victim)
6352 * to determine map[0] state
6355 for (i
= 0; i
< map
->num_members
; i
++) {
6358 disk
= get_imsm_disk(super
,
6359 get_imsm_disk_idx(dev
, i
, -1));
6360 if (!disk
|| is_failed(disk
))
6364 /* adding a pristine spare, assign a new index */
6365 if (dl
->index
< 0) {
6366 dl
->index
= super
->anchor
->num_disks
;
6367 super
->anchor
->num_disks
++;
6370 disk
->status
|= CONFIGURED_DISK
;
6371 disk
->status
&= ~SPARE_DISK
;
6374 to_state
= imsm_check_degraded(super
, dev
, failed
);
6375 map
->map_state
= IMSM_T_STATE_DEGRADED
;
6376 migrate(dev
, to_state
, MIGR_REBUILD
);
6377 migr_map
= get_imsm_map(dev
, 1);
6378 set_imsm_ord_tbl_ent(map
, u
->slot
, dl
->index
);
6379 set_imsm_ord_tbl_ent(migr_map
, u
->slot
, dl
->index
| IMSM_ORD_REBUILD
);
6381 /* update the family_num to mark a new container
6382 * generation, being careful to record the existing
6383 * family_num in orig_family_num to clean up after
6384 * earlier mdadm versions that neglected to set it.
6386 if (mpb
->orig_family_num
== 0)
6387 mpb
->orig_family_num
= mpb
->family_num
;
6388 mpb
->family_num
+= super
->random
;
6390 /* count arrays using the victim in the metadata */
6392 for (a
= st
->arrays
; a
; a
= a
->next
) {
6393 dev
= get_imsm_dev(super
, a
->info
.container_member
);
6394 map
= get_imsm_map(dev
, 0);
6396 if (get_imsm_disk_slot(map
, victim
) >= 0)
6400 /* delete the victim if it is no longer being
6406 /* We know that 'manager' isn't touching anything,
6407 * so it is safe to delete
6409 for (dlp
= &super
->disks
; *dlp
; dlp
= &(*dlp
)->next
)
6410 if ((*dlp
)->index
== victim
)
6413 /* victim may be on the missing list */
6415 for (dlp
= &super
->missing
; *dlp
; dlp
= &(*dlp
)->next
)
6416 if ((*dlp
)->index
== victim
)
6418 imsm_delete(super
, dlp
, victim
);
6422 case update_create_array
: {
6423 /* someone wants to create a new array, we need to be aware of
6424 * a few races/collisions:
6425 * 1/ 'Create' called by two separate instances of mdadm
6426 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
6427 * devices that have since been assimilated via
6429 * In the event this update can not be carried out mdadm will
6430 * (FIX ME) notice that its update did not take hold.
6432 struct imsm_update_create_array
*u
= (void *) update
->buf
;
6433 struct intel_dev
*dv
;
6434 struct imsm_dev
*dev
;
6435 struct imsm_map
*map
, *new_map
;
6436 unsigned long long start
, end
;
6437 unsigned long long new_start
, new_end
;
6439 struct disk_info
*inf
;
6442 /* handle racing creates: first come first serve */
6443 if (u
->dev_idx
< mpb
->num_raid_devs
) {
6444 dprintf("%s: subarray %d already defined\n",
6445 __func__
, u
->dev_idx
);
6449 /* check update is next in sequence */
6450 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
6451 dprintf("%s: can not create array %d expected index %d\n",
6452 __func__
, u
->dev_idx
, mpb
->num_raid_devs
);
6456 new_map
= get_imsm_map(&u
->dev
, 0);
6457 new_start
= __le32_to_cpu(new_map
->pba_of_lba0
);
6458 new_end
= new_start
+ __le32_to_cpu(new_map
->blocks_per_member
);
6459 inf
= get_disk_info(u
);
6461 /* handle activate_spare versus create race:
6462 * check to make sure that overlapping arrays do not include
6465 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
6466 dev
= get_imsm_dev(super
, i
);
6467 map
= get_imsm_map(dev
, 0);
6468 start
= __le32_to_cpu(map
->pba_of_lba0
);
6469 end
= start
+ __le32_to_cpu(map
->blocks_per_member
);
6470 if ((new_start
>= start
&& new_start
<= end
) ||
6471 (start
>= new_start
&& start
<= new_end
))
6476 if (disks_overlap(super
, i
, u
)) {
6477 dprintf("%s: arrays overlap\n", __func__
);
6482 /* check that prepare update was successful */
6483 if (!update
->space
) {
6484 dprintf("%s: prepare update failed\n", __func__
);
6488 /* check that all disks are still active before committing
6489 * changes. FIXME: could we instead handle this by creating a
6490 * degraded array? That's probably not what the user expects,
6491 * so better to drop this update on the floor.
6493 for (i
= 0; i
< new_map
->num_members
; i
++) {
6494 dl
= serial_to_dl(inf
[i
].serial
, super
);
6496 dprintf("%s: disk disappeared\n", __func__
);
6501 super
->updates_pending
++;
6503 /* convert spares to members and fixup ord_tbl */
6504 for (i
= 0; i
< new_map
->num_members
; i
++) {
6505 dl
= serial_to_dl(inf
[i
].serial
, super
);
6506 if (dl
->index
== -1) {
6507 dl
->index
= mpb
->num_disks
;
6509 dl
->disk
.status
|= CONFIGURED_DISK
;
6510 dl
->disk
.status
&= ~SPARE_DISK
;
6512 set_imsm_ord_tbl_ent(new_map
, i
, dl
->index
);
6517 update
->space
= NULL
;
6518 imsm_copy_dev(dev
, &u
->dev
);
6519 dv
->index
= u
->dev_idx
;
6520 dv
->next
= super
->devlist
;
6521 super
->devlist
= dv
;
6522 mpb
->num_raid_devs
++;
6524 imsm_update_version_info(super
);
6527 /* mdmon knows how to release update->space, but not
6528 * ((struct intel_dev *) update->space)->dev
6530 if (update
->space
) {
6536 case update_kill_array
: {
6537 struct imsm_update_kill_array
*u
= (void *) update
->buf
;
6538 int victim
= u
->dev_idx
;
6539 struct active_array
*a
;
6540 struct intel_dev
**dp
;
6541 struct imsm_dev
*dev
;
6543 /* sanity check that we are not affecting the uuid of
6544 * active arrays, or deleting an active array
6546 * FIXME when immutable ids are available, but note that
6547 * we'll also need to fixup the invalidated/active
6548 * subarray indexes in mdstat
6550 for (a
= st
->arrays
; a
; a
= a
->next
)
6551 if (a
->info
.container_member
>= victim
)
6553 /* by definition if mdmon is running at least one array
6554 * is active in the container, so checking
6555 * mpb->num_raid_devs is just extra paranoia
6557 dev
= get_imsm_dev(super
, victim
);
6558 if (a
|| !dev
|| mpb
->num_raid_devs
== 1) {
6559 dprintf("failed to delete subarray-%d\n", victim
);
6563 for (dp
= &super
->devlist
; *dp
;)
6564 if ((*dp
)->index
== (unsigned)super
->current_vol
) {
6567 if ((*dp
)->index
> (unsigned)victim
)
6571 mpb
->num_raid_devs
--;
6572 super
->updates_pending
++;
6575 case update_rename_array
: {
6576 struct imsm_update_rename_array
*u
= (void *) update
->buf
;
6577 char name
[MAX_RAID_SERIAL_LEN
+1];
6578 int target
= u
->dev_idx
;
6579 struct active_array
*a
;
6580 struct imsm_dev
*dev
;
6582 /* sanity check that we are not affecting the uuid of
6585 snprintf(name
, MAX_RAID_SERIAL_LEN
, "%s", (char *) u
->name
);
6586 name
[MAX_RAID_SERIAL_LEN
] = '\0';
6587 for (a
= st
->arrays
; a
; a
= a
->next
)
6588 if (a
->info
.container_member
== target
)
6590 dev
= get_imsm_dev(super
, u
->dev_idx
);
6591 if (a
|| !dev
|| !check_name(super
, name
, 1)) {
6592 dprintf("failed to rename subarray-%d\n", target
);
6596 snprintf((char *) dev
->volume
, MAX_RAID_SERIAL_LEN
, "%s", name
);
6597 super
->updates_pending
++;
6600 case update_add_remove_disk
: {
6601 /* we may be able to repair some arrays if disks are
6602 * being added, check teh status of add_remove_disk
6603 * if discs has been added.
6605 if (add_remove_disk_update(super
)) {
6606 struct active_array
*a
;
6608 super
->updates_pending
++;
6609 for (a
= st
->arrays
; a
; a
= a
->next
)
6610 a
->check_degraded
= 1;
6615 fprintf(stderr
, "error: unsuported process update type:"
6616 "(type: %d)\n", type
);
6620 static void imsm_prepare_update(struct supertype
*st
,
6621 struct metadata_update
*update
)
6624 * Allocate space to hold new disk entries, raid-device entries or a new
6625 * mpb if necessary. The manager synchronously waits for updates to
6626 * complete in the monitor, so new mpb buffers allocated here can be
6627 * integrated by the monitor thread without worrying about live pointers
6628 * in the manager thread.
6630 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
6631 struct intel_super
*super
= st
->sb
;
6632 struct imsm_super
*mpb
= super
->anchor
;
6637 case update_takeover
: {
6638 struct imsm_update_takeover
*u
= (void *)update
->buf
;
6639 if (u
->direction
== R0_TO_R10
) {
6640 void **tail
= (void **)&update
->space_list
;
6641 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->subarray
);
6642 struct imsm_map
*map
= get_imsm_map(dev
, 0);
6643 int num_members
= map
->num_members
;
6647 /* allocate memory for added disks */
6648 for (i
= 0; i
< num_members
; i
++) {
6649 size
= sizeof(struct dl
);
6650 space
= malloc(size
);
6659 /* allocate memory for new device */
6660 size
= sizeof_imsm_dev(super
->devlist
->dev
, 0) +
6661 (num_members
* sizeof(__u32
));
6662 space
= malloc(size
);
6671 len
= disks_to_mpb_size(num_members
* 2);
6673 /* if allocation didn't success, free buffer */
6674 while (update
->space_list
) {
6675 void **sp
= update
->space_list
;
6676 update
->space_list
= *sp
;
6684 case update_reshape_container_disks
: {
6685 /* Every raid device in the container is about to
6686 * gain some more devices, and we will enter a
6688 * So each 'imsm_map' will be bigger, and the imsm_vol
6689 * will now hold 2 of them.
6690 * Thus we need new 'struct imsm_dev' allocations sized
6691 * as sizeof_imsm_dev but with more devices in both maps.
6693 struct imsm_update_reshape
*u
= (void *)update
->buf
;
6694 struct intel_dev
*dl
;
6695 void **space_tail
= (void**)&update
->space_list
;
6697 dprintf("imsm: imsm_prepare_update() for update_reshape\n");
6699 for (dl
= super
->devlist
; dl
; dl
= dl
->next
) {
6700 int size
= sizeof_imsm_dev(dl
->dev
, 1);
6702 if (u
->new_raid_disks
> u
->old_raid_disks
)
6703 size
+= sizeof(__u32
)*2*
6704 (u
->new_raid_disks
- u
->old_raid_disks
);
6713 len
= disks_to_mpb_size(u
->new_raid_disks
);
6714 dprintf("New anchor length is %llu\n", (unsigned long long)len
);
6717 case update_create_array
: {
6718 struct imsm_update_create_array
*u
= (void *) update
->buf
;
6719 struct intel_dev
*dv
;
6720 struct imsm_dev
*dev
= &u
->dev
;
6721 struct imsm_map
*map
= get_imsm_map(dev
, 0);
6723 struct disk_info
*inf
;
6727 inf
= get_disk_info(u
);
6728 len
= sizeof_imsm_dev(dev
, 1);
6729 /* allocate a new super->devlist entry */
6730 dv
= malloc(sizeof(*dv
));
6732 dv
->dev
= malloc(len
);
6737 update
->space
= NULL
;
6741 /* count how many spares will be converted to members */
6742 for (i
= 0; i
< map
->num_members
; i
++) {
6743 dl
= serial_to_dl(inf
[i
].serial
, super
);
6745 /* hmm maybe it failed?, nothing we can do about
6750 if (count_memberships(dl
, super
) == 0)
6753 len
+= activate
* sizeof(struct imsm_disk
);
6760 /* check if we need a larger metadata buffer */
6761 if (super
->next_buf
)
6762 buf_len
= super
->next_len
;
6764 buf_len
= super
->len
;
6766 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
6767 /* ok we need a larger buf than what is currently allocated
6768 * if this allocation fails process_update will notice that
6769 * ->next_len is set and ->next_buf is NULL
6771 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
6772 if (super
->next_buf
)
6773 free(super
->next_buf
);
6775 super
->next_len
= buf_len
;
6776 if (posix_memalign(&super
->next_buf
, 512, buf_len
) == 0)
6777 memset(super
->next_buf
, 0, buf_len
);
6779 super
->next_buf
= NULL
;
6783 /* must be called while manager is quiesced */
6784 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, unsigned index
)
6786 struct imsm_super
*mpb
= super
->anchor
;
6788 struct imsm_dev
*dev
;
6789 struct imsm_map
*map
;
6790 int i
, j
, num_members
;
6793 dprintf("%s: deleting device[%d] from imsm_super\n",
6796 /* shift all indexes down one */
6797 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
6798 if (iter
->index
> (int)index
)
6800 for (iter
= super
->missing
; iter
; iter
= iter
->next
)
6801 if (iter
->index
> (int)index
)
6804 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
6805 dev
= get_imsm_dev(super
, i
);
6806 map
= get_imsm_map(dev
, 0);
6807 num_members
= map
->num_members
;
6808 for (j
= 0; j
< num_members
; j
++) {
6809 /* update ord entries being careful not to propagate
6810 * ord-flags to the first map
6812 ord
= get_imsm_ord_tbl_ent(dev
, j
, -1);
6814 if (ord_to_idx(ord
) <= index
)
6817 map
= get_imsm_map(dev
, 0);
6818 set_imsm_ord_tbl_ent(map
, j
, ord_to_idx(ord
- 1));
6819 map
= get_imsm_map(dev
, 1);
6821 set_imsm_ord_tbl_ent(map
, j
, ord
- 1);
6826 super
->updates_pending
++;
6828 struct dl
*dl
= *dlp
;
6830 *dlp
= (*dlp
)->next
;
6831 __free_imsm_disk(dl
);
6835 static char disk_by_path
[] = "/dev/disk/by-path/";
6837 static const char *imsm_get_disk_controller_domain(const char *path
)
6839 char disk_path
[PATH_MAX
];
6843 strncpy(disk_path
, disk_by_path
, PATH_MAX
- 1);
6844 strncat(disk_path
, path
, PATH_MAX
- strlen(disk_path
) - 1);
6845 if (stat(disk_path
, &st
) == 0) {
6846 struct sys_dev
* hba
;
6849 path
= devt_to_devpath(st
.st_rdev
);
6852 hba
= find_disk_attached_hba(-1, path
);
6853 if (hba
&& hba
->type
== SYS_DEV_SAS
)
6855 else if (hba
&& hba
->type
== SYS_DEV_SATA
)
6859 dprintf("path: %s hba: %s attached: %s\n",
6860 path
, (hba
) ? hba
->path
: "NULL", drv
);
6868 static int imsm_find_array_minor_by_subdev(int subdev
, int container
, int *minor
)
6870 char subdev_name
[20];
6871 struct mdstat_ent
*mdstat
;
6873 sprintf(subdev_name
, "%d", subdev
);
6874 mdstat
= mdstat_by_subdev(subdev_name
, container
);
6878 *minor
= mdstat
->devnum
;
6879 free_mdstat(mdstat
);
6883 static int imsm_reshape_is_allowed_on_container(struct supertype
*st
,
6884 struct geo_params
*geo
,
6885 int *old_raid_disks
)
6887 /* currently we only support increasing the number of devices
6888 * for a container. This increases the number of device for each
6889 * member array. They must all be RAID0 or RAID5.
6892 struct mdinfo
*info
, *member
;
6893 int devices_that_can_grow
= 0;
6895 dprintf("imsm: imsm_reshape_is_allowed_on_container(ENTER): "
6896 "st->devnum = (%i)\n",
6899 if (geo
->size
!= -1 ||
6900 geo
->level
!= UnSet
||
6901 geo
->layout
!= UnSet
||
6902 geo
->chunksize
!= 0 ||
6903 geo
->raid_disks
== UnSet
) {
6904 dprintf("imsm: Container operation is allowed for "
6905 "raid disks number change only.\n");
6909 info
= container_content_imsm(st
, NULL
);
6910 for (member
= info
; member
; member
= member
->next
) {
6914 dprintf("imsm: checking device_num: %i\n",
6915 member
->container_member
);
6917 if (geo
->raid_disks
<= member
->array
.raid_disks
) {
6918 /* we work on container for Online Capacity Expansion
6919 * only so raid_disks has to grow
6921 dprintf("imsm: for container operation raid disks "
6922 "increase is required\n");
6926 if ((info
->array
.level
!= 0) &&
6927 (info
->array
.level
!= 5)) {
6928 /* we cannot use this container with other raid level
6930 dprintf("imsm: for container operation wrong"
6931 " raid level (%i) detected\n",
6935 /* check for platform support
6936 * for this raid level configuration
6938 struct intel_super
*super
= st
->sb
;
6939 if (!is_raid_level_supported(super
->orom
,
6940 member
->array
.level
,
6942 dprintf("platform does not support raid%d with"
6946 geo
->raid_disks
> 1 ? "s" : "");
6951 if (*old_raid_disks
&&
6952 info
->array
.raid_disks
!= *old_raid_disks
)
6954 *old_raid_disks
= info
->array
.raid_disks
;
6956 /* All raid5 and raid0 volumes in container
6957 * have to be ready for Online Capacity Expansion
6958 * so they need to be assembled. We have already
6959 * checked that no recovery etc is happening.
6961 result
= imsm_find_array_minor_by_subdev(member
->container_member
,
6965 dprintf("imsm: cannot find array\n");
6968 devices_that_can_grow
++;
6971 if (!member
&& devices_that_can_grow
)
6975 dprintf("\tContainer operation allowed\n");
6977 dprintf("\tError: %i\n", ret_val
);
6982 /* Function: get_spares_for_grow
6983 * Description: Allocates memory and creates list of spare devices
6984 * avaliable in container. Checks if spare drive size is acceptable.
6985 * Parameters: Pointer to the supertype structure
6986 * Returns: Pointer to the list of spare devices (mdinfo structure) on success,
6989 static struct mdinfo
*get_spares_for_grow(struct supertype
*st
)
6991 unsigned long long min_size
= min_acceptable_spare_size_imsm(st
);
6992 return container_choose_spares(st
, min_size
, NULL
, NULL
, NULL
, 0);
6995 /******************************************************************************
6996 * function: imsm_create_metadata_update_for_reshape
6997 * Function creates update for whole IMSM container.
6999 ******************************************************************************/
7000 static int imsm_create_metadata_update_for_reshape(
7001 struct supertype
*st
,
7002 struct geo_params
*geo
,
7004 struct imsm_update_reshape
**updatep
)
7006 struct intel_super
*super
= st
->sb
;
7007 struct imsm_super
*mpb
= super
->anchor
;
7008 int update_memory_size
= 0;
7009 struct imsm_update_reshape
*u
= NULL
;
7010 struct mdinfo
*spares
= NULL
;
7012 int delta_disks
= 0;
7015 dprintf("imsm_update_metadata_for_reshape(enter) raid_disks = %i\n",
7018 delta_disks
= geo
->raid_disks
- old_raid_disks
;
7020 /* size of all update data without anchor */
7021 update_memory_size
= sizeof(struct imsm_update_reshape
);
7023 /* now add space for spare disks that we need to add. */
7024 update_memory_size
+= sizeof(u
->new_disks
[0]) * (delta_disks
- 1);
7026 u
= calloc(1, update_memory_size
);
7029 "cannot get memory for imsm_update_reshape update\n");
7032 u
->type
= update_reshape_container_disks
;
7033 u
->old_raid_disks
= old_raid_disks
;
7034 u
->new_raid_disks
= geo
->raid_disks
;
7036 /* now get spare disks list
7038 spares
= get_spares_for_grow(st
);
7041 || delta_disks
> spares
->array
.spare_disks
) {
7042 fprintf(stderr
, Name
": imsm: ERROR: Cannot get spare devices "
7043 "for %s.\n", geo
->dev_name
);
7047 /* we have got spares
7048 * update disk list in imsm_disk list table in anchor
7050 dprintf("imsm: %i spares are available.\n\n",
7051 spares
->array
.spare_disks
);
7054 for (i
= 0; i
< delta_disks
; i
++) {
7059 u
->new_disks
[i
] = makedev(dev
->disk
.major
,
7061 dl
= get_disk_super(super
, dev
->disk
.major
, dev
->disk
.minor
);
7062 dl
->index
= mpb
->num_disks
;
7072 dprintf("imsm: reshape update preparation :");
7073 if (i
== delta_disks
) {
7076 return update_memory_size
;
7079 dprintf(" Error\n");
7084 static void imsm_update_metadata_locally(struct supertype
*st
,
7087 struct metadata_update mu
;
7092 mu
.space_list
= NULL
;
7094 imsm_prepare_update(st
, &mu
);
7095 imsm_process_update(st
, &mu
);
7097 while (mu
.space_list
) {
7098 void **space
= mu
.space_list
;
7099 mu
.space_list
= *space
;
7104 /***************************************************************************
7105 * Function: imsm_analyze_change
7106 * Description: Function analyze change for single volume
7107 * and validate if transition is supported
7108 * Parameters: Geometry parameters, supertype structure
7109 * Returns: Operation type code on success, -1 if fail
7110 ****************************************************************************/
7111 enum imsm_reshape_type
imsm_analyze_change(struct supertype
*st
,
7112 struct geo_params
*geo
)
7119 getinfo_super_imsm_volume(st
, &info
, NULL
);
7121 if ((geo
->level
!= info
.array
.level
) &&
7122 (geo
->level
>= 0) &&
7123 (geo
->level
!= UnSet
)) {
7124 switch (info
.array
.level
) {
7126 if (geo
->level
== 5) {
7127 change
= CH_MIGRATION
;
7130 if (geo
->level
== 10) {
7131 change
= CH_TAKEOVER
;
7136 if (geo
->level
== 0) {
7137 change
= CH_TAKEOVER
;
7142 if (geo
->level
== 0)
7143 change
= CH_MIGRATION
;
7146 if (geo
->level
== 0) {
7147 change
= CH_TAKEOVER
;
7154 Name
" Error. Level Migration from %d to %d "
7156 info
.array
.level
, geo
->level
);
7157 goto analyse_change_exit
;
7160 geo
->level
= info
.array
.level
;
7162 if ((geo
->layout
!= info
.array
.layout
)
7163 && ((geo
->layout
!= UnSet
) && (geo
->layout
!= -1))) {
7164 change
= CH_MIGRATION
;
7165 if ((info
.array
.layout
== 0)
7166 && (info
.array
.level
== 5)
7167 && (geo
->layout
== 5)) {
7168 /* reshape 5 -> 4 */
7169 } else if ((info
.array
.layout
== 5)
7170 && (info
.array
.level
== 5)
7171 && (geo
->layout
== 0)) {
7172 /* reshape 4 -> 5 */
7177 Name
" Error. Layout Migration from %d to %d "
7179 info
.array
.layout
, geo
->layout
);
7181 goto analyse_change_exit
;
7184 geo
->layout
= info
.array
.layout
;
7186 if ((geo
->chunksize
> 0) && (geo
->chunksize
!= UnSet
)
7187 && (geo
->chunksize
!= info
.array
.chunk_size
))
7188 change
= CH_MIGRATION
;
7190 geo
->chunksize
= info
.array
.chunk_size
;
7192 chunk
= geo
->chunksize
/ 1024;
7193 if (!validate_geometry_imsm(st
,
7203 struct intel_super
*super
= st
->sb
;
7204 struct imsm_super
*mpb
= super
->anchor
;
7206 if (mpb
->num_raid_devs
> 1) {
7208 Name
" Error. Cannot perform operation on %s"
7209 "- for this operation it MUST be single "
7210 "array in container\n",
7216 analyse_change_exit
:
7221 int imsm_takeover(struct supertype
*st
, struct geo_params
*geo
)
7223 struct intel_super
*super
= st
->sb
;
7224 struct imsm_update_takeover
*u
;
7226 u
= malloc(sizeof(struct imsm_update_takeover
));
7230 u
->type
= update_takeover
;
7231 u
->subarray
= super
->current_vol
;
7233 /* 10->0 transition */
7234 if (geo
->level
== 0)
7235 u
->direction
= R10_TO_R0
;
7237 /* 0->10 transition */
7238 if (geo
->level
== 10)
7239 u
->direction
= R0_TO_R10
;
7241 /* update metadata locally */
7242 imsm_update_metadata_locally(st
, u
,
7243 sizeof(struct imsm_update_takeover
));
7244 /* and possibly remotely */
7245 if (st
->update_tail
)
7246 append_metadata_update(st
, u
,
7247 sizeof(struct imsm_update_takeover
));
7254 static int imsm_reshape_super(struct supertype
*st
, long long size
, int level
,
7255 int layout
, int chunksize
, int raid_disks
,
7256 int delta_disks
, char *backup
, char *dev
,
7260 struct geo_params geo
;
7262 dprintf("imsm: reshape_super called.\n");
7264 memset(&geo
, 0, sizeof(struct geo_params
));
7267 geo
.dev_id
= st
->devnum
;
7270 geo
.layout
= layout
;
7271 geo
.chunksize
= chunksize
;
7272 geo
.raid_disks
= raid_disks
;
7273 if (delta_disks
!= UnSet
)
7274 geo
.raid_disks
+= delta_disks
;
7276 dprintf("\tfor level : %i\n", geo
.level
);
7277 dprintf("\tfor raid_disks : %i\n", geo
.raid_disks
);
7279 if (experimental() == 0)
7282 if (st
->container_dev
== st
->devnum
) {
7283 /* On container level we can only increase number of devices. */
7284 dprintf("imsm: info: Container operation\n");
7285 int old_raid_disks
= 0;
7286 if (imsm_reshape_is_allowed_on_container(
7287 st
, &geo
, &old_raid_disks
)) {
7288 struct imsm_update_reshape
*u
= NULL
;
7291 len
= imsm_create_metadata_update_for_reshape(
7292 st
, &geo
, old_raid_disks
, &u
);
7295 dprintf("imsm: Cannot prepare update\n");
7296 goto exit_imsm_reshape_super
;
7300 /* update metadata locally */
7301 imsm_update_metadata_locally(st
, u
, len
);
7302 /* and possibly remotely */
7303 if (st
->update_tail
)
7304 append_metadata_update(st
, u
, len
);
7309 fprintf(stderr
, Name
": (imsm) Operation "
7310 "is not allowed on this container\n");
7313 /* On volume level we support following operations
7314 * - takeover: raid10 -> raid0; raid0 -> raid10
7315 * - chunk size migration
7316 * - migration: raid5 -> raid0; raid0 -> raid5
7318 struct intel_super
*super
= st
->sb
;
7319 struct intel_dev
*dev
= super
->devlist
;
7321 dprintf("imsm: info: Volume operation\n");
7322 /* find requested device */
7324 imsm_find_array_minor_by_subdev(dev
->index
, st
->container_dev
, &devnum
);
7325 if (devnum
== geo
.dev_id
)
7330 fprintf(stderr
, Name
" Cannot find %s (%i) subarray\n",
7331 geo
.dev_name
, geo
.dev_id
);
7332 goto exit_imsm_reshape_super
;
7334 super
->current_vol
= dev
->index
;
7335 change
= imsm_analyze_change(st
, &geo
);
7338 ret_val
= imsm_takeover(st
, &geo
);
7348 exit_imsm_reshape_super
:
7349 dprintf("imsm: reshape_super Exit code = %i\n", ret_val
);
7353 static int imsm_manage_reshape(
7354 int afd
, struct mdinfo
*sra
, struct reshape
*reshape
,
7355 struct supertype
*st
, unsigned long stripes
,
7356 int *fds
, unsigned long long *offsets
,
7357 int dests
, int *destfd
, unsigned long long *destoffsets
)
7359 /* Just use child_monitor for now */
7360 return child_monitor(
7361 afd
, sra
, reshape
, st
, stripes
,
7362 fds
, offsets
, dests
, destfd
, destoffsets
);
7364 #endif /* MDASSEMBLE */
7366 struct superswitch super_imsm
= {
7368 .examine_super
= examine_super_imsm
,
7369 .brief_examine_super
= brief_examine_super_imsm
,
7370 .brief_examine_subarrays
= brief_examine_subarrays_imsm
,
7371 .export_examine_super
= export_examine_super_imsm
,
7372 .detail_super
= detail_super_imsm
,
7373 .brief_detail_super
= brief_detail_super_imsm
,
7374 .write_init_super
= write_init_super_imsm
,
7375 .validate_geometry
= validate_geometry_imsm
,
7376 .add_to_super
= add_to_super_imsm
,
7377 .remove_from_super
= remove_from_super_imsm
,
7378 .detail_platform
= detail_platform_imsm
,
7379 .kill_subarray
= kill_subarray_imsm
,
7380 .update_subarray
= update_subarray_imsm
,
7381 .load_container
= load_container_imsm
,
7382 .default_geometry
= default_geometry_imsm
,
7383 .get_disk_controller_domain
= imsm_get_disk_controller_domain
,
7384 .reshape_super
= imsm_reshape_super
,
7385 .manage_reshape
= imsm_manage_reshape
,
7387 .match_home
= match_home_imsm
,
7388 .uuid_from_super
= uuid_from_super_imsm
,
7389 .getinfo_super
= getinfo_super_imsm
,
7390 .getinfo_super_disks
= getinfo_super_disks_imsm
,
7391 .update_super
= update_super_imsm
,
7393 .avail_size
= avail_size_imsm
,
7394 .min_acceptable_spare_size
= min_acceptable_spare_size_imsm
,
7396 .compare_super
= compare_super_imsm
,
7398 .load_super
= load_super_imsm
,
7399 .init_super
= init_super_imsm
,
7400 .store_super
= store_super_imsm
,
7401 .free_super
= free_super_imsm
,
7402 .match_metadata_desc
= match_metadata_desc_imsm
,
7403 .container_content
= container_content_imsm
,
7410 .open_new
= imsm_open_new
,
7411 .set_array_state
= imsm_set_array_state
,
7412 .set_disk
= imsm_set_disk
,
7413 .sync_metadata
= imsm_sync_metadata
,
7414 .activate_spare
= imsm_activate_spare
,
7415 .process_update
= imsm_process_update
,
7416 .prepare_update
= imsm_prepare_update
,
7417 #endif /* MDASSEMBLE */