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
45 #define MPB_ATTRIB_RAID0 __cpu_to_le32(0x00000001)
47 #define MPB_ATTRIB_RAID1 __cpu_to_le32(0x00000002)
49 #define MPB_ATTRIB_RAID10 __cpu_to_le32(0x00000004)
51 #define MPB_ATTRIB_RAID1E __cpu_to_le32(0x00000008)
53 #define MPB_ATTRIB_RAID5 __cpu_to_le32(0x00000010)
54 /* supports RAID CNG */
55 #define MPB_ATTRIB_RAIDCNG __cpu_to_le32(0x00000020)
56 /* supports expanded stripe sizes of 256K, 512K and 1MB */
57 #define MPB_ATTRIB_EXP_STRIPE_SIZE __cpu_to_le32(0x00000040)
59 /* The OROM Support RST Caching of Volumes */
60 #define MPB_ATTRIB_NVM __cpu_to_le32(0x02000000)
61 /* The OROM supports creating disks greater than 2TB */
62 #define MPB_ATTRIB_2TB_DISK __cpu_to_le32(0x04000000)
63 /* The OROM supports Bad Block Management */
64 #define MPB_ATTRIB_BBM __cpu_to_le32(0x08000000)
66 /* THe OROM Supports NVM Caching of Volumes */
67 #define MPB_ATTRIB_NEVER_USE2 __cpu_to_le32(0x10000000)
68 /* The OROM supports creating volumes greater than 2TB */
69 #define MPB_ATTRIB_2TB __cpu_to_le32(0x20000000)
70 /* originally for PMP, now it's wasted b/c. Never use this bit! */
71 #define MPB_ATTRIB_NEVER_USE __cpu_to_le32(0x40000000)
72 /* Verify MPB contents against checksum after reading MPB */
73 #define MPB_ATTRIB_CHECKSUM_VERIFY __cpu_to_le32(0x80000000)
75 /* Define all supported attributes that have to be accepted by mdadm
77 #define MPB_ATTRIB_SUPPORTED (MPB_ATTRIB_CHECKSUM_VERIFY | \
79 MPB_ATTRIB_2TB_DISK | \
84 MPB_ATTRIB_EXP_STRIPE_SIZE)
86 /* Define attributes that are unused but not harmful */
87 #define MPB_ATTRIB_IGNORED (MPB_ATTRIB_NEVER_USE)
89 #define MPB_SECTOR_CNT 2210
90 #define IMSM_RESERVED_SECTORS 4096
91 #define NUM_BLOCKS_DIRTY_STRIPE_REGION 2056
92 #define SECT_PER_MB_SHIFT 11
94 /* Disk configuration info. */
95 #define IMSM_MAX_DEVICES 255
97 __u8 serial
[MAX_RAID_SERIAL_LEN
];/* 0xD8 - 0xE7 ascii serial number */
98 __u32 total_blocks_lo
; /* 0xE8 - 0xEB total blocks lo */
99 __u32 scsi_id
; /* 0xEC - 0xEF scsi ID */
100 #define SPARE_DISK __cpu_to_le32(0x01) /* Spare */
101 #define CONFIGURED_DISK __cpu_to_le32(0x02) /* Member of some RaidDev */
102 #define FAILED_DISK __cpu_to_le32(0x04) /* Permanent failure */
103 __u32 status
; /* 0xF0 - 0xF3 */
104 __u32 owner_cfg_num
; /* which config 0,1,2... owns this disk */
105 __u32 total_blocks_hi
; /* 0xF4 - 0xF5 total blocks hi */
106 #define IMSM_DISK_FILLERS 3
107 __u32 filler
[IMSM_DISK_FILLERS
]; /* 0xF5 - 0x107 MPB_DISK_FILLERS for future expansion */
110 /* map selector for map managment
116 /* RAID map configuration infos. */
118 __u32 pba_of_lba0_lo
; /* start address of partition */
119 __u32 blocks_per_member_lo
;/* blocks per member */
120 __u32 num_data_stripes_lo
; /* number of data stripes */
121 __u16 blocks_per_strip
;
122 __u8 map_state
; /* Normal, Uninitialized, Degraded, Failed */
123 #define IMSM_T_STATE_NORMAL 0
124 #define IMSM_T_STATE_UNINITIALIZED 1
125 #define IMSM_T_STATE_DEGRADED 2
126 #define IMSM_T_STATE_FAILED 3
128 #define IMSM_T_RAID0 0
129 #define IMSM_T_RAID1 1
130 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
131 __u8 num_members
; /* number of member disks */
132 __u8 num_domains
; /* number of parity domains */
133 __u8 failed_disk_num
; /* valid only when state is degraded */
135 __u32 pba_of_lba0_hi
;
136 __u32 blocks_per_member_hi
;
137 __u32 num_data_stripes_hi
;
138 __u32 filler
[4]; /* expansion area */
139 #define IMSM_ORD_REBUILD (1 << 24)
140 __u32 disk_ord_tbl
[1]; /* disk_ord_tbl[num_members],
141 * top byte contains some flags
143 } __attribute__ ((packed
));
146 __u32 curr_migr_unit
;
147 __u32 checkpoint_id
; /* id to access curr_migr_unit */
148 __u8 migr_state
; /* Normal or Migrating */
150 #define MIGR_REBUILD 1
151 #define MIGR_VERIFY 2 /* analagous to echo check > sync_action */
152 #define MIGR_GEN_MIGR 3
153 #define MIGR_STATE_CHANGE 4
154 #define MIGR_REPAIR 5
155 __u8 migr_type
; /* Initializing, Rebuilding, ... */
157 __u8 fs_state
; /* fast-sync state for CnG (0xff == disabled) */
158 __u16 verify_errors
; /* number of mismatches */
159 __u16 bad_blocks
; /* number of bad blocks during verify */
161 struct imsm_map map
[1];
162 /* here comes another one if migr_state */
163 } __attribute__ ((packed
));
166 __u8 volume
[MAX_RAID_SERIAL_LEN
];
169 #define DEV_BOOTABLE __cpu_to_le32(0x01)
170 #define DEV_BOOT_DEVICE __cpu_to_le32(0x02)
171 #define DEV_READ_COALESCING __cpu_to_le32(0x04)
172 #define DEV_WRITE_COALESCING __cpu_to_le32(0x08)
173 #define DEV_LAST_SHUTDOWN_DIRTY __cpu_to_le32(0x10)
174 #define DEV_HIDDEN_AT_BOOT __cpu_to_le32(0x20)
175 #define DEV_CURRENTLY_HIDDEN __cpu_to_le32(0x40)
176 #define DEV_VERIFY_AND_FIX __cpu_to_le32(0x80)
177 #define DEV_MAP_STATE_UNINIT __cpu_to_le32(0x100)
178 #define DEV_NO_AUTO_RECOVERY __cpu_to_le32(0x200)
179 #define DEV_CLONE_N_GO __cpu_to_le32(0x400)
180 #define DEV_CLONE_MAN_SYNC __cpu_to_le32(0x800)
181 #define DEV_CNG_MASTER_DISK_NUM __cpu_to_le32(0x1000)
182 __u32 status
; /* Persistent RaidDev status */
183 __u32 reserved_blocks
; /* Reserved blocks at beginning of volume */
187 __u8 cng_master_disk
;
191 #define IMSM_DEV_FILLERS 10
192 __u32 filler
[IMSM_DEV_FILLERS
];
194 } __attribute__ ((packed
));
197 __u8 sig
[MAX_SIGNATURE_LENGTH
]; /* 0x00 - 0x1F */
198 __u32 check_sum
; /* 0x20 - 0x23 MPB Checksum */
199 __u32 mpb_size
; /* 0x24 - 0x27 Size of MPB */
200 __u32 family_num
; /* 0x28 - 0x2B Checksum from first time this config was written */
201 __u32 generation_num
; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
202 __u32 error_log_size
; /* 0x30 - 0x33 in bytes */
203 __u32 attributes
; /* 0x34 - 0x37 */
204 __u8 num_disks
; /* 0x38 Number of configured disks */
205 __u8 num_raid_devs
; /* 0x39 Number of configured volumes */
206 __u8 error_log_pos
; /* 0x3A */
207 __u8 fill
[1]; /* 0x3B */
208 __u32 cache_size
; /* 0x3c - 0x40 in mb */
209 __u32 orig_family_num
; /* 0x40 - 0x43 original family num */
210 __u32 pwr_cycle_count
; /* 0x44 - 0x47 simulated power cycle count for array */
211 __u32 bbm_log_size
; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
212 #define IMSM_FILLERS 35
213 __u32 filler
[IMSM_FILLERS
]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
214 struct imsm_disk disk
[1]; /* 0xD8 diskTbl[numDisks] */
215 /* here comes imsm_dev[num_raid_devs] */
216 /* here comes BBM logs */
217 } __attribute__ ((packed
));
219 #define BBM_LOG_MAX_ENTRIES 254
221 struct bbm_log_entry
{
222 __u64 defective_block_start
;
223 #define UNREADABLE 0xFFFFFFFF
224 __u32 spare_block_offset
;
225 __u16 remapped_marked_count
;
227 } __attribute__ ((__packed__
));
230 __u32 signature
; /* 0xABADB10C */
232 __u32 reserved_spare_block_count
; /* 0 */
233 __u32 reserved
; /* 0xFFFF */
234 __u64 first_spare_lba
;
235 struct bbm_log_entry mapped_block_entries
[BBM_LOG_MAX_ENTRIES
];
236 } __attribute__ ((__packed__
));
239 static char *map_state_str
[] = { "normal", "uninitialized", "degraded", "failed" };
242 #define RAID_DISK_RESERVED_BLOCKS_IMSM_HI 2209
244 #define GEN_MIGR_AREA_SIZE 2048 /* General Migration Copy Area size in blocks */
246 #define MIGR_REC_BUF_SIZE 512 /* size of migr_record i/o buffer */
247 #define MIGR_REC_POSITION 512 /* migr_record position offset on disk,
248 * MIGR_REC_BUF_SIZE <= MIGR_REC_POSITION
251 #define UNIT_SRC_NORMAL 0 /* Source data for curr_migr_unit must
252 * be recovered using srcMap */
253 #define UNIT_SRC_IN_CP_AREA 1 /* Source data for curr_migr_unit has
254 * already been migrated and must
255 * be recovered from checkpoint area */
257 __u32 rec_status
; /* Status used to determine how to restart
258 * migration in case it aborts
260 __u32 curr_migr_unit
; /* 0..numMigrUnits-1 */
261 __u32 family_num
; /* Family number of MPB
262 * containing the RaidDev
263 * that is migrating */
264 __u32 ascending_migr
; /* True if migrating in increasing
266 __u32 blocks_per_unit
; /* Num disk blocks per unit of operation */
267 __u32 dest_depth_per_unit
; /* Num member blocks each destMap
269 * advances per unit-of-operation */
270 __u32 ckpt_area_pba
; /* Pba of first block of ckpt copy area */
271 __u32 dest_1st_member_lba
; /* First member lba on first
272 * stripe of destination */
273 __u32 num_migr_units
; /* Total num migration units-of-op */
274 __u32 post_migr_vol_cap
; /* Size of volume after
275 * migration completes */
276 __u32 post_migr_vol_cap_hi
; /* Expansion space for LBA64 */
277 __u32 ckpt_read_disk_num
; /* Which member disk in destSubMap[0] the
278 * migration ckpt record was read from
279 * (for recovered migrations) */
280 } __attribute__ ((__packed__
));
285 * 2: metadata does not match
293 struct md_list
*next
;
296 #define pr_vrb(fmt, arg...) (void) (verbose && pr_err(fmt, ##arg))
298 static __u8
migr_type(struct imsm_dev
*dev
)
300 if (dev
->vol
.migr_type
== MIGR_VERIFY
&&
301 dev
->status
& DEV_VERIFY_AND_FIX
)
304 return dev
->vol
.migr_type
;
307 static void set_migr_type(struct imsm_dev
*dev
, __u8 migr_type
)
309 /* for compatibility with older oroms convert MIGR_REPAIR, into
310 * MIGR_VERIFY w/ DEV_VERIFY_AND_FIX status
312 if (migr_type
== MIGR_REPAIR
) {
313 dev
->vol
.migr_type
= MIGR_VERIFY
;
314 dev
->status
|= DEV_VERIFY_AND_FIX
;
316 dev
->vol
.migr_type
= migr_type
;
317 dev
->status
&= ~DEV_VERIFY_AND_FIX
;
321 static unsigned int sector_count(__u32 bytes
)
323 return ROUND_UP(bytes
, 512) / 512;
326 static unsigned int mpb_sectors(struct imsm_super
*mpb
)
328 return sector_count(__le32_to_cpu(mpb
->mpb_size
));
332 struct imsm_dev
*dev
;
333 struct intel_dev
*next
;
338 enum sys_dev_type type
;
341 struct intel_hba
*next
;
348 /* internal representation of IMSM metadata */
351 void *buf
; /* O_DIRECT buffer for reading/writing metadata */
352 struct imsm_super
*anchor
; /* immovable parameters */
355 void *migr_rec_buf
; /* buffer for I/O operations */
356 struct migr_record
*migr_rec
; /* migration record */
358 int clean_migration_record_by_mdmon
; /* when reshape is switched to next
359 array, it indicates that mdmon is allowed to clean migration
361 size_t len
; /* size of the 'buf' allocation */
362 void *next_buf
; /* for realloc'ing buf from the manager */
364 int updates_pending
; /* count of pending updates for mdmon */
365 int current_vol
; /* index of raid device undergoing creation */
366 unsigned long long create_offset
; /* common start for 'current_vol' */
367 __u32 random
; /* random data for seeding new family numbers */
368 struct intel_dev
*devlist
;
372 __u8 serial
[MAX_RAID_SERIAL_LEN
];
375 struct imsm_disk disk
;
378 struct extent
*e
; /* for determining freespace @ create */
379 int raiddisk
; /* slot to fill in autolayout */
381 } *disks
, *current_disk
;
382 struct dl
*disk_mgmt_list
; /* list of disks to add/remove while mdmon
384 struct dl
*missing
; /* disks removed while we weren't looking */
385 struct bbm_log
*bbm_log
;
386 struct intel_hba
*hba
; /* device path of the raid controller for this metadata */
387 const struct imsm_orom
*orom
; /* platform firmware support */
388 struct intel_super
*next
; /* (temp) list for disambiguating family_num */
392 struct imsm_disk disk
;
393 #define IMSM_UNKNOWN_OWNER (-1)
395 struct intel_disk
*next
;
399 unsigned long long start
, size
;
402 /* definitions of reshape process types */
403 enum imsm_reshape_type
{
409 /* definition of messages passed to imsm_process_update */
410 enum imsm_update_type
{
411 update_activate_spare
,
415 update_add_remove_disk
,
416 update_reshape_container_disks
,
417 update_reshape_migration
,
419 update_general_migration_checkpoint
,
423 struct imsm_update_activate_spare
{
424 enum imsm_update_type type
;
428 struct imsm_update_activate_spare
*next
;
434 unsigned long long size
;
441 enum takeover_direction
{
445 struct imsm_update_takeover
{
446 enum imsm_update_type type
;
448 enum takeover_direction direction
;
451 struct imsm_update_reshape
{
452 enum imsm_update_type type
;
456 int new_disks
[1]; /* new_raid_disks - old_raid_disks makedev number */
459 struct imsm_update_reshape_migration
{
460 enum imsm_update_type type
;
463 /* fields for array migration changes
470 int new_disks
[1]; /* new_raid_disks - old_raid_disks makedev number */
473 struct imsm_update_size_change
{
474 enum imsm_update_type type
;
479 struct imsm_update_general_migration_checkpoint
{
480 enum imsm_update_type type
;
481 __u32 curr_migr_unit
;
485 __u8 serial
[MAX_RAID_SERIAL_LEN
];
488 struct imsm_update_create_array
{
489 enum imsm_update_type type
;
494 struct imsm_update_kill_array
{
495 enum imsm_update_type type
;
499 struct imsm_update_rename_array
{
500 enum imsm_update_type type
;
501 __u8 name
[MAX_RAID_SERIAL_LEN
];
505 struct imsm_update_add_remove_disk
{
506 enum imsm_update_type type
;
509 static const char *_sys_dev_type
[] = {
510 [SYS_DEV_UNKNOWN
] = "Unknown",
511 [SYS_DEV_SAS
] = "SAS",
512 [SYS_DEV_SATA
] = "SATA",
513 [SYS_DEV_NVME
] = "NVMe",
514 [SYS_DEV_VMD
] = "VMD"
517 const char *get_sys_dev_type(enum sys_dev_type type
)
519 if (type
>= SYS_DEV_MAX
)
520 type
= SYS_DEV_UNKNOWN
;
522 return _sys_dev_type
[type
];
525 static struct intel_hba
* alloc_intel_hba(struct sys_dev
*device
)
527 struct intel_hba
*result
= xmalloc(sizeof(*result
));
529 result
->type
= device
->type
;
530 result
->path
= xstrdup(device
->path
);
532 if (result
->path
&& (result
->pci_id
= strrchr(result
->path
, '/')) != NULL
)
538 static struct intel_hba
* find_intel_hba(struct intel_hba
*hba
, struct sys_dev
*device
)
540 struct intel_hba
*result
;
542 for (result
= hba
; result
; result
= result
->next
) {
543 if (result
->type
== device
->type
&& strcmp(result
->path
, device
->path
) == 0)
549 static int attach_hba_to_super(struct intel_super
*super
, struct sys_dev
*device
)
551 struct intel_hba
*hba
;
553 /* check if disk attached to Intel HBA */
554 hba
= find_intel_hba(super
->hba
, device
);
557 /* Check if HBA is already attached to super */
558 if (super
->hba
== NULL
) {
559 super
->hba
= alloc_intel_hba(device
);
564 /* Intel metadata allows for all disks attached to the same type HBA.
565 * Do not support HBA types mixing
567 if (device
->type
!= hba
->type
)
570 /* Always forbid spanning between VMD domains (seen as different controllers by mdadm) */
571 if (device
->type
== SYS_DEV_VMD
&& !path_attached_to_hba(device
->path
, hba
->path
))
574 /* Multiple same type HBAs can be used if they share the same OROM */
575 const struct imsm_orom
*device_orom
= get_orom_by_device_id(device
->dev_id
);
577 if (device_orom
!= super
->orom
)
583 hba
->next
= alloc_intel_hba(device
);
587 static struct sys_dev
* find_disk_attached_hba(int fd
, const char *devname
)
589 struct sys_dev
*list
, *elem
;
592 if ((list
= find_intel_devices()) == NULL
)
596 disk_path
= (char *) devname
;
598 disk_path
= diskfd_to_devpath(fd
);
603 for (elem
= list
; elem
; elem
= elem
->next
)
604 if (path_attached_to_hba(disk_path
, elem
->path
))
607 if (disk_path
!= devname
)
613 static int find_intel_hba_capability(int fd
, struct intel_super
*super
,
616 static struct supertype
*match_metadata_desc_imsm(char *arg
)
618 struct supertype
*st
;
620 if (strcmp(arg
, "imsm") != 0 &&
621 strcmp(arg
, "default") != 0
625 st
= xcalloc(1, sizeof(*st
));
626 st
->ss
= &super_imsm
;
627 st
->max_devs
= IMSM_MAX_DEVICES
;
628 st
->minor_version
= 0;
634 static __u8
*get_imsm_version(struct imsm_super
*mpb
)
636 return &mpb
->sig
[MPB_SIG_LEN
];
640 /* retrieve a disk directly from the anchor when the anchor is known to be
641 * up-to-date, currently only at load time
643 static struct imsm_disk
*__get_imsm_disk(struct imsm_super
*mpb
, __u8 index
)
645 if (index
>= mpb
->num_disks
)
647 return &mpb
->disk
[index
];
650 /* retrieve the disk description based on a index of the disk
653 static struct dl
*get_imsm_dl_disk(struct intel_super
*super
, __u8 index
)
657 for (d
= super
->disks
; d
; d
= d
->next
)
658 if (d
->index
== index
)
663 /* retrieve a disk from the parsed metadata */
664 static struct imsm_disk
*get_imsm_disk(struct intel_super
*super
, __u8 index
)
668 dl
= get_imsm_dl_disk(super
, index
);
675 /* generate a checksum directly from the anchor when the anchor is known to be
676 * up-to-date, currently only at load or write_super after coalescing
678 static __u32
__gen_imsm_checksum(struct imsm_super
*mpb
)
680 __u32 end
= mpb
->mpb_size
/ sizeof(end
);
681 __u32
*p
= (__u32
*) mpb
;
685 sum
+= __le32_to_cpu(*p
);
689 return sum
- __le32_to_cpu(mpb
->check_sum
);
692 static size_t sizeof_imsm_map(struct imsm_map
*map
)
694 return sizeof(struct imsm_map
) + sizeof(__u32
) * (map
->num_members
- 1);
697 struct imsm_map
*get_imsm_map(struct imsm_dev
*dev
, int second_map
)
699 /* A device can have 2 maps if it is in the middle of a migration.
701 * MAP_0 - we return the first map
702 * MAP_1 - we return the second map if it exists, else NULL
703 * MAP_X - we return the second map if it exists, else the first
705 struct imsm_map
*map
= &dev
->vol
.map
[0];
706 struct imsm_map
*map2
= NULL
;
708 if (dev
->vol
.migr_state
)
709 map2
= (void *)map
+ sizeof_imsm_map(map
);
711 switch (second_map
) {
728 /* return the size of the device.
729 * migr_state increases the returned size if map[0] were to be duplicated
731 static size_t sizeof_imsm_dev(struct imsm_dev
*dev
, int migr_state
)
733 size_t size
= sizeof(*dev
) - sizeof(struct imsm_map
) +
734 sizeof_imsm_map(get_imsm_map(dev
, MAP_0
));
736 /* migrating means an additional map */
737 if (dev
->vol
.migr_state
)
738 size
+= sizeof_imsm_map(get_imsm_map(dev
, MAP_1
));
740 size
+= sizeof_imsm_map(get_imsm_map(dev
, MAP_0
));
746 /* retrieve disk serial number list from a metadata update */
747 static struct disk_info
*get_disk_info(struct imsm_update_create_array
*update
)
750 struct disk_info
*inf
;
752 inf
= u
+ sizeof(*update
) - sizeof(struct imsm_dev
) +
753 sizeof_imsm_dev(&update
->dev
, 0);
759 static struct imsm_dev
*__get_imsm_dev(struct imsm_super
*mpb
, __u8 index
)
765 if (index
>= mpb
->num_raid_devs
)
768 /* devices start after all disks */
769 offset
= ((void *) &mpb
->disk
[mpb
->num_disks
]) - _mpb
;
771 for (i
= 0; i
<= index
; i
++)
773 return _mpb
+ offset
;
775 offset
+= sizeof_imsm_dev(_mpb
+ offset
, 0);
780 static struct imsm_dev
*get_imsm_dev(struct intel_super
*super
, __u8 index
)
782 struct intel_dev
*dv
;
784 if (index
>= super
->anchor
->num_raid_devs
)
786 for (dv
= super
->devlist
; dv
; dv
= dv
->next
)
787 if (dv
->index
== index
)
794 * == MAP_0 get first map
795 * == MAP_1 get second map
796 * == MAP_X than get map according to the current migr_state
798 static __u32
get_imsm_ord_tbl_ent(struct imsm_dev
*dev
,
802 struct imsm_map
*map
;
804 map
= get_imsm_map(dev
, second_map
);
806 /* top byte identifies disk under rebuild */
807 return __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
810 #define ord_to_idx(ord) (((ord) << 8) >> 8)
811 static __u32
get_imsm_disk_idx(struct imsm_dev
*dev
, int slot
, int second_map
)
813 __u32 ord
= get_imsm_ord_tbl_ent(dev
, slot
, second_map
);
815 return ord_to_idx(ord
);
818 static void set_imsm_ord_tbl_ent(struct imsm_map
*map
, int slot
, __u32 ord
)
820 map
->disk_ord_tbl
[slot
] = __cpu_to_le32(ord
);
823 static int get_imsm_disk_slot(struct imsm_map
*map
, unsigned idx
)
828 for (slot
= 0; slot
< map
->num_members
; slot
++) {
829 ord
= __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
830 if (ord_to_idx(ord
) == idx
)
837 static int get_imsm_raid_level(struct imsm_map
*map
)
839 if (map
->raid_level
== 1) {
840 if (map
->num_members
== 2)
846 return map
->raid_level
;
849 static int cmp_extent(const void *av
, const void *bv
)
851 const struct extent
*a
= av
;
852 const struct extent
*b
= bv
;
853 if (a
->start
< b
->start
)
855 if (a
->start
> b
->start
)
860 static int count_memberships(struct dl
*dl
, struct intel_super
*super
)
865 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
866 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
867 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
869 if (get_imsm_disk_slot(map
, dl
->index
) >= 0)
876 static __u32
imsm_min_reserved_sectors(struct intel_super
*super
);
878 static int split_ull(unsigned long long n
, __u32
*lo
, __u32
*hi
)
880 if (lo
== 0 || hi
== 0)
882 *lo
= __le32_to_cpu((unsigned)n
);
883 *hi
= __le32_to_cpu((unsigned)(n
>> 32));
887 static unsigned long long join_u32(__u32 lo
, __u32 hi
)
889 return (unsigned long long)__le32_to_cpu(lo
) |
890 (((unsigned long long)__le32_to_cpu(hi
)) << 32);
893 static unsigned long long total_blocks(struct imsm_disk
*disk
)
897 return join_u32(disk
->total_blocks_lo
, disk
->total_blocks_hi
);
900 static unsigned long long pba_of_lba0(struct imsm_map
*map
)
904 return join_u32(map
->pba_of_lba0_lo
, map
->pba_of_lba0_hi
);
907 static unsigned long long blocks_per_member(struct imsm_map
*map
)
911 return join_u32(map
->blocks_per_member_lo
, map
->blocks_per_member_hi
);
915 static unsigned long long num_data_stripes(struct imsm_map
*map
)
919 return join_u32(map
->num_data_stripes_lo
, map
->num_data_stripes_hi
);
922 static void set_total_blocks(struct imsm_disk
*disk
, unsigned long long n
)
924 split_ull(n
, &disk
->total_blocks_lo
, &disk
->total_blocks_hi
);
928 static void set_pba_of_lba0(struct imsm_map
*map
, unsigned long long n
)
930 split_ull(n
, &map
->pba_of_lba0_lo
, &map
->pba_of_lba0_hi
);
933 static void set_blocks_per_member(struct imsm_map
*map
, unsigned long long n
)
935 split_ull(n
, &map
->blocks_per_member_lo
, &map
->blocks_per_member_hi
);
938 static void set_num_data_stripes(struct imsm_map
*map
, unsigned long long n
)
940 split_ull(n
, &map
->num_data_stripes_lo
, &map
->num_data_stripes_hi
);
943 static struct extent
*get_extents(struct intel_super
*super
, struct dl
*dl
)
945 /* find a list of used extents on the given physical device */
946 struct extent
*rv
, *e
;
948 int memberships
= count_memberships(dl
, super
);
951 /* trim the reserved area for spares, so they can join any array
952 * regardless of whether the OROM has assigned sectors from the
953 * IMSM_RESERVED_SECTORS region
956 reservation
= imsm_min_reserved_sectors(super
);
958 reservation
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
960 rv
= xcalloc(sizeof(struct extent
), (memberships
+ 1));
963 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
964 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
965 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
967 if (get_imsm_disk_slot(map
, dl
->index
) >= 0) {
968 e
->start
= pba_of_lba0(map
);
969 e
->size
= blocks_per_member(map
);
973 qsort(rv
, memberships
, sizeof(*rv
), cmp_extent
);
975 /* determine the start of the metadata
976 * when no raid devices are defined use the default
977 * ...otherwise allow the metadata to truncate the value
978 * as is the case with older versions of imsm
981 struct extent
*last
= &rv
[memberships
- 1];
982 unsigned long long remainder
;
984 remainder
= total_blocks(&dl
->disk
) - (last
->start
+ last
->size
);
985 /* round down to 1k block to satisfy precision of the kernel
989 /* make sure remainder is still sane */
990 if (remainder
< (unsigned)ROUND_UP(super
->len
, 512) >> 9)
991 remainder
= ROUND_UP(super
->len
, 512) >> 9;
992 if (reservation
> remainder
)
993 reservation
= remainder
;
995 e
->start
= total_blocks(&dl
->disk
) - reservation
;
1000 /* try to determine how much space is reserved for metadata from
1001 * the last get_extents() entry, otherwise fallback to the
1004 static __u32
imsm_reserved_sectors(struct intel_super
*super
, struct dl
*dl
)
1010 /* for spares just return a minimal reservation which will grow
1011 * once the spare is picked up by an array
1013 if (dl
->index
== -1)
1014 return MPB_SECTOR_CNT
;
1016 e
= get_extents(super
, dl
);
1018 return MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1020 /* scroll to last entry */
1021 for (i
= 0; e
[i
].size
; i
++)
1024 rv
= total_blocks(&dl
->disk
) - e
[i
].start
;
1031 static int is_spare(struct imsm_disk
*disk
)
1033 return (disk
->status
& SPARE_DISK
) == SPARE_DISK
;
1036 static int is_configured(struct imsm_disk
*disk
)
1038 return (disk
->status
& CONFIGURED_DISK
) == CONFIGURED_DISK
;
1041 static int is_failed(struct imsm_disk
*disk
)
1043 return (disk
->status
& FAILED_DISK
) == FAILED_DISK
;
1046 /* try to determine how much space is reserved for metadata from
1047 * the last get_extents() entry on the smallest active disk,
1048 * otherwise fallback to the default
1050 static __u32
imsm_min_reserved_sectors(struct intel_super
*super
)
1054 unsigned long long min_active
;
1056 __u32 rv
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
1057 struct dl
*dl
, *dl_min
= NULL
;
1063 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
1066 unsigned long long blocks
= total_blocks(&dl
->disk
);
1067 if (blocks
< min_active
|| min_active
== 0) {
1069 min_active
= blocks
;
1075 /* find last lba used by subarrays on the smallest active disk */
1076 e
= get_extents(super
, dl_min
);
1079 for (i
= 0; e
[i
].size
; i
++)
1082 remainder
= min_active
- e
[i
].start
;
1085 /* to give priority to recovery we should not require full
1086 IMSM_RESERVED_SECTORS from the spare */
1087 rv
= MPB_SECTOR_CNT
+ NUM_BLOCKS_DIRTY_STRIPE_REGION
;
1089 /* if real reservation is smaller use that value */
1090 return (remainder
< rv
) ? remainder
: rv
;
1093 /* Return minimum size of a spare that can be used in this array*/
1094 static unsigned long long min_acceptable_spare_size_imsm(struct supertype
*st
)
1096 struct intel_super
*super
= st
->sb
;
1100 unsigned long long rv
= 0;
1104 /* find first active disk in array */
1106 while (dl
&& (is_failed(&dl
->disk
) || dl
->index
== -1))
1110 /* find last lba used by subarrays */
1111 e
= get_extents(super
, dl
);
1114 for (i
= 0; e
[i
].size
; i
++)
1117 rv
= e
[i
-1].start
+ e
[i
-1].size
;
1120 /* add the amount of space needed for metadata */
1121 rv
= rv
+ imsm_min_reserved_sectors(super
);
1126 static int is_gen_migration(struct imsm_dev
*dev
);
1129 static __u64
blocks_per_migr_unit(struct intel_super
*super
,
1130 struct imsm_dev
*dev
);
1132 static void print_imsm_dev(struct intel_super
*super
,
1133 struct imsm_dev
*dev
,
1139 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
1140 struct imsm_map
*map2
= get_imsm_map(dev
, MAP_1
);
1144 printf("[%.16s]:\n", dev
->volume
);
1145 printf(" UUID : %s\n", uuid
);
1146 printf(" RAID Level : %d", get_imsm_raid_level(map
));
1148 printf(" <-- %d", get_imsm_raid_level(map2
));
1150 printf(" Members : %d", map
->num_members
);
1152 printf(" <-- %d", map2
->num_members
);
1154 printf(" Slots : [");
1155 for (i
= 0; i
< map
->num_members
; i
++) {
1156 ord
= get_imsm_ord_tbl_ent(dev
, i
, MAP_0
);
1157 printf("%s", ord
& IMSM_ORD_REBUILD
? "_" : "U");
1162 for (i
= 0; i
< map2
->num_members
; i
++) {
1163 ord
= get_imsm_ord_tbl_ent(dev
, i
, MAP_1
);
1164 printf("%s", ord
& IMSM_ORD_REBUILD
? "_" : "U");
1169 printf(" Failed disk : ");
1170 if (map
->failed_disk_num
== 0xff)
1173 printf("%i", map
->failed_disk_num
);
1175 slot
= get_imsm_disk_slot(map
, disk_idx
);
1177 ord
= get_imsm_ord_tbl_ent(dev
, slot
, MAP_X
);
1178 printf(" This Slot : %d%s\n", slot
,
1179 ord
& IMSM_ORD_REBUILD
? " (out-of-sync)" : "");
1181 printf(" This Slot : ?\n");
1182 sz
= __le32_to_cpu(dev
->size_high
);
1184 sz
+= __le32_to_cpu(dev
->size_low
);
1185 printf(" Array Size : %llu%s\n", (unsigned long long)sz
,
1186 human_size(sz
* 512));
1187 sz
= blocks_per_member(map
);
1188 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz
,
1189 human_size(sz
* 512));
1190 printf(" Sector Offset : %llu\n",
1192 printf(" Num Stripes : %llu\n",
1193 num_data_stripes(map
));
1194 printf(" Chunk Size : %u KiB",
1195 __le16_to_cpu(map
->blocks_per_strip
) / 2);
1197 printf(" <-- %u KiB",
1198 __le16_to_cpu(map2
->blocks_per_strip
) / 2);
1200 printf(" Reserved : %d\n", __le32_to_cpu(dev
->reserved_blocks
));
1201 printf(" Migrate State : ");
1202 if (dev
->vol
.migr_state
) {
1203 if (migr_type(dev
) == MIGR_INIT
)
1204 printf("initialize\n");
1205 else if (migr_type(dev
) == MIGR_REBUILD
)
1206 printf("rebuild\n");
1207 else if (migr_type(dev
) == MIGR_VERIFY
)
1209 else if (migr_type(dev
) == MIGR_GEN_MIGR
)
1210 printf("general migration\n");
1211 else if (migr_type(dev
) == MIGR_STATE_CHANGE
)
1212 printf("state change\n");
1213 else if (migr_type(dev
) == MIGR_REPAIR
)
1216 printf("<unknown:%d>\n", migr_type(dev
));
1219 printf(" Map State : %s", map_state_str
[map
->map_state
]);
1220 if (dev
->vol
.migr_state
) {
1221 struct imsm_map
*map
= get_imsm_map(dev
, MAP_1
);
1223 printf(" <-- %s", map_state_str
[map
->map_state
]);
1224 printf("\n Checkpoint : %u ",
1225 __le32_to_cpu(dev
->vol
.curr_migr_unit
));
1226 if ((is_gen_migration(dev
)) && ((slot
> 1) || (slot
< 0)))
1229 printf("(%llu)", (unsigned long long)
1230 blocks_per_migr_unit(super
, dev
));
1233 printf(" Dirty State : %s\n", dev
->vol
.dirty
? "dirty" : "clean");
1236 static void print_imsm_disk(struct imsm_disk
*disk
, int index
, __u32 reserved
)
1238 char str
[MAX_RAID_SERIAL_LEN
+ 1];
1241 if (index
< -1 || !disk
)
1245 snprintf(str
, MAX_RAID_SERIAL_LEN
+ 1, "%s", disk
->serial
);
1247 printf(" Disk%02d Serial : %s\n", index
, str
);
1249 printf(" Disk Serial : %s\n", str
);
1250 printf(" State :%s%s%s\n", is_spare(disk
) ? " spare" : "",
1251 is_configured(disk
) ? " active" : "",
1252 is_failed(disk
) ? " failed" : "");
1253 printf(" Id : %08x\n", __le32_to_cpu(disk
->scsi_id
));
1254 sz
= total_blocks(disk
) - reserved
;
1255 printf(" Usable Size : %llu%s\n", (unsigned long long)sz
,
1256 human_size(sz
* 512));
1259 void examine_migr_rec_imsm(struct intel_super
*super
)
1261 struct migr_record
*migr_rec
= super
->migr_rec
;
1262 struct imsm_super
*mpb
= super
->anchor
;
1265 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1266 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1267 struct imsm_map
*map
;
1270 if (is_gen_migration(dev
) == 0)
1273 printf("\nMigration Record Information:");
1275 /* first map under migration */
1276 map
= get_imsm_map(dev
, MAP_0
);
1278 slot
= get_imsm_disk_slot(map
, super
->disks
->index
);
1279 if ((map
== NULL
) || (slot
> 1) || (slot
< 0)) {
1280 printf(" Empty\n ");
1281 printf("Examine one of first two disks in array\n");
1284 printf("\n Status : ");
1285 if (__le32_to_cpu(migr_rec
->rec_status
) == UNIT_SRC_NORMAL
)
1288 printf("Contains Data\n");
1289 printf(" Current Unit : %u\n",
1290 __le32_to_cpu(migr_rec
->curr_migr_unit
));
1291 printf(" Family : %u\n",
1292 __le32_to_cpu(migr_rec
->family_num
));
1293 printf(" Ascending : %u\n",
1294 __le32_to_cpu(migr_rec
->ascending_migr
));
1295 printf(" Blocks Per Unit : %u\n",
1296 __le32_to_cpu(migr_rec
->blocks_per_unit
));
1297 printf(" Dest. Depth Per Unit : %u\n",
1298 __le32_to_cpu(migr_rec
->dest_depth_per_unit
));
1299 printf(" Checkpoint Area pba : %u\n",
1300 __le32_to_cpu(migr_rec
->ckpt_area_pba
));
1301 printf(" First member lba : %u\n",
1302 __le32_to_cpu(migr_rec
->dest_1st_member_lba
));
1303 printf(" Total Number of Units : %u\n",
1304 __le32_to_cpu(migr_rec
->num_migr_units
));
1305 printf(" Size of volume : %u\n",
1306 __le32_to_cpu(migr_rec
->post_migr_vol_cap
));
1307 printf(" Expansion space for LBA64 : %u\n",
1308 __le32_to_cpu(migr_rec
->post_migr_vol_cap_hi
));
1309 printf(" Record was read from : %u\n",
1310 __le32_to_cpu(migr_rec
->ckpt_read_disk_num
));
1315 #endif /* MDASSEMBLE */
1316 /*******************************************************************************
1317 * function: imsm_check_attributes
1318 * Description: Function checks if features represented by attributes flags
1319 * are supported by mdadm.
1321 * attributes - Attributes read from metadata
1323 * 0 - passed attributes contains unsupported features flags
1324 * 1 - all features are supported
1325 ******************************************************************************/
1326 static int imsm_check_attributes(__u32 attributes
)
1329 __u32 not_supported
= MPB_ATTRIB_SUPPORTED
^0xffffffff;
1331 not_supported
&= ~MPB_ATTRIB_IGNORED
;
1333 not_supported
&= attributes
;
1334 if (not_supported
) {
1335 pr_err("(IMSM): Unsupported attributes : %x\n",
1336 (unsigned)__le32_to_cpu(not_supported
));
1337 if (not_supported
& MPB_ATTRIB_CHECKSUM_VERIFY
) {
1338 dprintf("\t\tMPB_ATTRIB_CHECKSUM_VERIFY \n");
1339 not_supported
^= MPB_ATTRIB_CHECKSUM_VERIFY
;
1341 if (not_supported
& MPB_ATTRIB_2TB
) {
1342 dprintf("\t\tMPB_ATTRIB_2TB\n");
1343 not_supported
^= MPB_ATTRIB_2TB
;
1345 if (not_supported
& MPB_ATTRIB_RAID0
) {
1346 dprintf("\t\tMPB_ATTRIB_RAID0\n");
1347 not_supported
^= MPB_ATTRIB_RAID0
;
1349 if (not_supported
& MPB_ATTRIB_RAID1
) {
1350 dprintf("\t\tMPB_ATTRIB_RAID1\n");
1351 not_supported
^= MPB_ATTRIB_RAID1
;
1353 if (not_supported
& MPB_ATTRIB_RAID10
) {
1354 dprintf("\t\tMPB_ATTRIB_RAID10\n");
1355 not_supported
^= MPB_ATTRIB_RAID10
;
1357 if (not_supported
& MPB_ATTRIB_RAID1E
) {
1358 dprintf("\t\tMPB_ATTRIB_RAID1E\n");
1359 not_supported
^= MPB_ATTRIB_RAID1E
;
1361 if (not_supported
& MPB_ATTRIB_RAID5
) {
1362 dprintf("\t\tMPB_ATTRIB_RAID5\n");
1363 not_supported
^= MPB_ATTRIB_RAID5
;
1365 if (not_supported
& MPB_ATTRIB_RAIDCNG
) {
1366 dprintf("\t\tMPB_ATTRIB_RAIDCNG\n");
1367 not_supported
^= MPB_ATTRIB_RAIDCNG
;
1369 if (not_supported
& MPB_ATTRIB_BBM
) {
1370 dprintf("\t\tMPB_ATTRIB_BBM\n");
1371 not_supported
^= MPB_ATTRIB_BBM
;
1373 if (not_supported
& MPB_ATTRIB_CHECKSUM_VERIFY
) {
1374 dprintf("\t\tMPB_ATTRIB_CHECKSUM_VERIFY (== MPB_ATTRIB_LEGACY)\n");
1375 not_supported
^= MPB_ATTRIB_CHECKSUM_VERIFY
;
1377 if (not_supported
& MPB_ATTRIB_EXP_STRIPE_SIZE
) {
1378 dprintf("\t\tMPB_ATTRIB_EXP_STRIP_SIZE\n");
1379 not_supported
^= MPB_ATTRIB_EXP_STRIPE_SIZE
;
1381 if (not_supported
& MPB_ATTRIB_2TB_DISK
) {
1382 dprintf("\t\tMPB_ATTRIB_2TB_DISK\n");
1383 not_supported
^= MPB_ATTRIB_2TB_DISK
;
1385 if (not_supported
& MPB_ATTRIB_NEVER_USE2
) {
1386 dprintf("\t\tMPB_ATTRIB_NEVER_USE2\n");
1387 not_supported
^= MPB_ATTRIB_NEVER_USE2
;
1389 if (not_supported
& MPB_ATTRIB_NEVER_USE
) {
1390 dprintf("\t\tMPB_ATTRIB_NEVER_USE\n");
1391 not_supported
^= MPB_ATTRIB_NEVER_USE
;
1395 dprintf("(IMSM): Unknown attributes : %x\n", not_supported
);
1404 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
, char *map
);
1406 static void examine_super_imsm(struct supertype
*st
, char *homehost
)
1408 struct intel_super
*super
= st
->sb
;
1409 struct imsm_super
*mpb
= super
->anchor
;
1410 char str
[MAX_SIGNATURE_LENGTH
];
1415 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
1418 snprintf(str
, MPB_SIG_LEN
, "%s", mpb
->sig
);
1419 printf(" Magic : %s\n", str
);
1420 snprintf(str
, strlen(MPB_VERSION_RAID0
), "%s", get_imsm_version(mpb
));
1421 printf(" Version : %s\n", get_imsm_version(mpb
));
1422 printf(" Orig Family : %08x\n", __le32_to_cpu(mpb
->orig_family_num
));
1423 printf(" Family : %08x\n", __le32_to_cpu(mpb
->family_num
));
1424 printf(" Generation : %08x\n", __le32_to_cpu(mpb
->generation_num
));
1425 printf(" Attributes : ");
1426 if (imsm_check_attributes(mpb
->attributes
))
1427 printf("All supported\n");
1429 printf("not supported\n");
1430 getinfo_super_imsm(st
, &info
, NULL
);
1431 fname_from_uuid(st
, &info
, nbuf
, ':');
1432 printf(" UUID : %s\n", nbuf
+ 5);
1433 sum
= __le32_to_cpu(mpb
->check_sum
);
1434 printf(" Checksum : %08x %s\n", sum
,
1435 __gen_imsm_checksum(mpb
) == sum
? "correct" : "incorrect");
1436 printf(" MPB Sectors : %d\n", mpb_sectors(mpb
));
1437 printf(" Disks : %d\n", mpb
->num_disks
);
1438 printf(" RAID Devices : %d\n", mpb
->num_raid_devs
);
1439 print_imsm_disk(__get_imsm_disk(mpb
, super
->disks
->index
), super
->disks
->index
, reserved
);
1440 if (super
->bbm_log
) {
1441 struct bbm_log
*log
= super
->bbm_log
;
1444 printf("Bad Block Management Log:\n");
1445 printf(" Log Size : %d\n", __le32_to_cpu(mpb
->bbm_log_size
));
1446 printf(" Signature : %x\n", __le32_to_cpu(log
->signature
));
1447 printf(" Entry Count : %d\n", __le32_to_cpu(log
->entry_count
));
1448 printf(" Spare Blocks : %d\n", __le32_to_cpu(log
->reserved_spare_block_count
));
1449 printf(" First Spare : %llx\n",
1450 (unsigned long long) __le64_to_cpu(log
->first_spare_lba
));
1452 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
1454 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
1456 super
->current_vol
= i
;
1457 getinfo_super_imsm(st
, &info
, NULL
);
1458 fname_from_uuid(st
, &info
, nbuf
, ':');
1459 print_imsm_dev(super
, dev
, nbuf
+ 5, super
->disks
->index
);
1461 for (i
= 0; i
< mpb
->num_disks
; i
++) {
1462 if (i
== super
->disks
->index
)
1464 print_imsm_disk(__get_imsm_disk(mpb
, i
), i
, reserved
);
1467 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
1468 if (dl
->index
== -1)
1469 print_imsm_disk(&dl
->disk
, -1, reserved
);
1471 examine_migr_rec_imsm(super
);
1474 static void brief_examine_super_imsm(struct supertype
*st
, int verbose
)
1476 /* We just write a generic IMSM ARRAY entry */
1479 struct intel_super
*super
= st
->sb
;
1481 if (!super
->anchor
->num_raid_devs
) {
1482 printf("ARRAY metadata=imsm\n");
1486 getinfo_super_imsm(st
, &info
, NULL
);
1487 fname_from_uuid(st
, &info
, nbuf
, ':');
1488 printf("ARRAY metadata=imsm UUID=%s\n", nbuf
+ 5);
1491 static void brief_examine_subarrays_imsm(struct supertype
*st
, int verbose
)
1493 /* We just write a generic IMSM ARRAY entry */
1497 struct intel_super
*super
= st
->sb
;
1500 if (!super
->anchor
->num_raid_devs
)
1503 getinfo_super_imsm(st
, &info
, NULL
);
1504 fname_from_uuid(st
, &info
, nbuf
, ':');
1505 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
1506 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
1508 super
->current_vol
= i
;
1509 getinfo_super_imsm(st
, &info
, NULL
);
1510 fname_from_uuid(st
, &info
, nbuf1
, ':');
1511 printf("ARRAY /dev/md/%.16s container=%s member=%d UUID=%s\n",
1512 dev
->volume
, nbuf
+ 5, i
, nbuf1
+ 5);
1516 static void export_examine_super_imsm(struct supertype
*st
)
1518 struct intel_super
*super
= st
->sb
;
1519 struct imsm_super
*mpb
= super
->anchor
;
1523 getinfo_super_imsm(st
, &info
, NULL
);
1524 fname_from_uuid(st
, &info
, nbuf
, ':');
1525 printf("MD_METADATA=imsm\n");
1526 printf("MD_LEVEL=container\n");
1527 printf("MD_UUID=%s\n", nbuf
+5);
1528 printf("MD_DEVICES=%u\n", mpb
->num_disks
);
1531 static int copy_metadata_imsm(struct supertype
*st
, int from
, int to
)
1533 /* The second last 512byte sector of the device contains
1534 * the "struct imsm_super" metadata.
1535 * This contains mpb_size which is the size in bytes of the
1536 * extended metadata. This is located immediately before
1538 * We want to read all that, plus the last sector which
1539 * may contain a migration record, and write it all
1543 unsigned long long dsize
, offset
;
1545 struct imsm_super
*sb
;
1548 if (posix_memalign(&buf
, 4096, 4096) != 0)
1551 if (!get_dev_size(from
, NULL
, &dsize
))
1554 if (lseek64(from
, dsize
-1024, 0) < 0)
1556 if (read(from
, buf
, 512) != 512)
1559 if (strncmp((char*)sb
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0)
1562 sectors
= mpb_sectors(sb
) + 2;
1563 offset
= dsize
- sectors
* 512;
1564 if (lseek64(from
, offset
, 0) < 0 ||
1565 lseek64(to
, offset
, 0) < 0)
1567 while (written
< sectors
* 512) {
1568 int n
= sectors
*512 - written
;
1571 if (read(from
, buf
, n
) != n
)
1573 if (write(to
, buf
, n
) != n
)
1584 static void detail_super_imsm(struct supertype
*st
, char *homehost
)
1589 getinfo_super_imsm(st
, &info
, NULL
);
1590 fname_from_uuid(st
, &info
, nbuf
, ':');
1591 printf("\n UUID : %s\n", nbuf
+ 5);
1594 static void brief_detail_super_imsm(struct supertype
*st
)
1598 getinfo_super_imsm(st
, &info
, NULL
);
1599 fname_from_uuid(st
, &info
, nbuf
, ':');
1600 printf(" UUID=%s", nbuf
+ 5);
1603 static int imsm_read_serial(int fd
, char *devname
, __u8
*serial
);
1604 static void fd2devname(int fd
, char *name
);
1606 static int ahci_enumerate_ports(const char *hba_path
, int port_count
, int host_base
, int verbose
)
1608 /* dump an unsorted list of devices attached to AHCI Intel storage
1609 * controller, as well as non-connected ports
1611 int hba_len
= strlen(hba_path
) + 1;
1616 unsigned long port_mask
= (1 << port_count
) - 1;
1618 if (port_count
> (int)sizeof(port_mask
) * 8) {
1620 pr_err("port_count %d out of range\n", port_count
);
1624 /* scroll through /sys/dev/block looking for devices attached to
1627 dir
= opendir("/sys/dev/block");
1631 for (ent
= readdir(dir
); ent
; ent
= readdir(dir
)) {
1642 if (sscanf(ent
->d_name
, "%d:%d", &major
, &minor
) != 2)
1644 path
= devt_to_devpath(makedev(major
, minor
));
1647 if (!path_attached_to_hba(path
, hba_path
)) {
1653 /* retrieve the scsi device type */
1654 if (asprintf(&device
, "/sys/dev/block/%d:%d/device/xxxxxxx", major
, minor
) < 0) {
1656 pr_err("failed to allocate 'device'\n");
1660 sprintf(device
, "/sys/dev/block/%d:%d/device/type", major
, minor
);
1661 if (load_sys(device
, buf
, sizeof(buf
)) != 0) {
1663 pr_err("failed to read device type for %s\n",
1669 type
= strtoul(buf
, NULL
, 10);
1671 /* if it's not a disk print the vendor and model */
1672 if (!(type
== 0 || type
== 7 || type
== 14)) {
1675 sprintf(device
, "/sys/dev/block/%d:%d/device/vendor", major
, minor
);
1676 if (load_sys(device
, buf
, sizeof(buf
)) == 0) {
1677 strncpy(vendor
, buf
, sizeof(vendor
));
1678 vendor
[sizeof(vendor
) - 1] = '\0';
1679 c
= (char *) &vendor
[sizeof(vendor
) - 1];
1680 while (isspace(*c
) || *c
== '\0')
1684 sprintf(device
, "/sys/dev/block/%d:%d/device/model", major
, minor
);
1685 if (load_sys(device
, buf
, sizeof(buf
)) == 0) {
1686 strncpy(model
, buf
, sizeof(model
));
1687 model
[sizeof(model
) - 1] = '\0';
1688 c
= (char *) &model
[sizeof(model
) - 1];
1689 while (isspace(*c
) || *c
== '\0')
1693 if (vendor
[0] && model
[0])
1694 sprintf(buf
, "%.64s %.64s", vendor
, model
);
1696 switch (type
) { /* numbers from hald/linux/device.c */
1697 case 1: sprintf(buf
, "tape"); break;
1698 case 2: sprintf(buf
, "printer"); break;
1699 case 3: sprintf(buf
, "processor"); break;
1701 case 5: sprintf(buf
, "cdrom"); break;
1702 case 6: sprintf(buf
, "scanner"); break;
1703 case 8: sprintf(buf
, "media_changer"); break;
1704 case 9: sprintf(buf
, "comm"); break;
1705 case 12: sprintf(buf
, "raid"); break;
1706 default: sprintf(buf
, "unknown");
1712 /* chop device path to 'host%d' and calculate the port number */
1713 c
= strchr(&path
[hba_len
], '/');
1716 pr_err("%s - invalid path name\n", path
+ hba_len
);
1721 if ((sscanf(&path
[hba_len
], "ata%d", &port
) == 1) ||
1722 ((sscanf(&path
[hba_len
], "host%d", &port
) == 1)))
1726 *c
= '/'; /* repair the full string */
1727 pr_err("failed to determine port number for %s\n",
1734 /* mark this port as used */
1735 port_mask
&= ~(1 << port
);
1737 /* print out the device information */
1739 printf(" Port%d : - non-disk device (%s) -\n", port
, buf
);
1743 fd
= dev_open(ent
->d_name
, O_RDONLY
);
1745 printf(" Port%d : - disk info unavailable -\n", port
);
1747 fd2devname(fd
, buf
);
1748 printf(" Port%d : %s", port
, buf
);
1749 if (imsm_read_serial(fd
, NULL
, (__u8
*) buf
) == 0)
1750 printf(" (%.*s)\n", MAX_RAID_SERIAL_LEN
, buf
);
1765 for (i
= 0; i
< port_count
; i
++)
1766 if (port_mask
& (1 << i
))
1767 printf(" Port%d : - no device attached -\n", i
);
1773 static int print_vmd_attached_devs(struct sys_dev
*hba
)
1781 if (hba
->type
!= SYS_DEV_VMD
)
1784 /* scroll through /sys/dev/block looking for devices attached to
1787 dir
= opendir("/sys/bus/pci/drivers/nvme");
1791 for (ent
= readdir(dir
); ent
; ent
= readdir(dir
)) {
1794 /* is 'ent' a device? check that the 'subsystem' link exists and
1795 * that its target matches 'bus'
1797 sprintf(path
, "/sys/bus/pci/drivers/nvme/%s/subsystem",
1799 n
= readlink(path
, link
, sizeof(link
));
1800 if (n
< 0 || n
>= (int)sizeof(link
))
1803 c
= strrchr(link
, '/');
1806 if (strncmp("pci", c
+1, strlen("pci")) != 0)
1809 sprintf(path
, "/sys/bus/pci/drivers/nvme/%s", ent
->d_name
);
1810 /* if not a intel NVMe - skip it*/
1811 if (devpath_to_vendor(path
) != 0x8086)
1814 rp
= realpath(path
, NULL
);
1818 if (path_attached_to_hba(rp
, hba
->path
)) {
1819 printf(" NVMe under VMD : %s\n", rp
);
1828 static void print_found_intel_controllers(struct sys_dev
*elem
)
1830 for (; elem
; elem
= elem
->next
) {
1831 pr_err("found Intel(R) ");
1832 if (elem
->type
== SYS_DEV_SATA
)
1833 fprintf(stderr
, "SATA ");
1834 else if (elem
->type
== SYS_DEV_SAS
)
1835 fprintf(stderr
, "SAS ");
1836 else if (elem
->type
== SYS_DEV_NVME
)
1837 fprintf(stderr
, "NVMe ");
1839 if (elem
->type
== SYS_DEV_VMD
)
1840 fprintf(stderr
, "VMD domain");
1842 fprintf(stderr
, "RAID controller");
1845 fprintf(stderr
, " at %s", elem
->pci_id
);
1846 fprintf(stderr
, ".\n");
1851 static int ahci_get_port_count(const char *hba_path
, int *port_count
)
1858 if ((dir
= opendir(hba_path
)) == NULL
)
1861 for (ent
= readdir(dir
); ent
; ent
= readdir(dir
)) {
1864 if ((sscanf(ent
->d_name
, "ata%d", &host
) != 1) &&
1865 ((sscanf(ent
->d_name
, "host%d", &host
) != 1)))
1867 if (*port_count
== 0)
1869 else if (host
< host_base
)
1872 if (host
+ 1 > *port_count
+ host_base
)
1873 *port_count
= host
+ 1 - host_base
;
1879 static void print_imsm_capability(const struct imsm_orom
*orom
)
1881 printf(" Platform : Intel(R) ");
1882 if (orom
->capabilities
== 0 && orom
->driver_features
== 0)
1883 printf("Matrix Storage Manager\n");
1885 printf("Rapid Storage Technology%s\n",
1886 imsm_orom_is_enterprise(orom
) ? " enterprise" : "");
1887 if (orom
->major_ver
|| orom
->minor_ver
|| orom
->hotfix_ver
|| orom
->build
)
1888 printf(" Version : %d.%d.%d.%d\n", orom
->major_ver
,
1889 orom
->minor_ver
, orom
->hotfix_ver
, orom
->build
);
1890 printf(" RAID Levels :%s%s%s%s%s\n",
1891 imsm_orom_has_raid0(orom
) ? " raid0" : "",
1892 imsm_orom_has_raid1(orom
) ? " raid1" : "",
1893 imsm_orom_has_raid1e(orom
) ? " raid1e" : "",
1894 imsm_orom_has_raid10(orom
) ? " raid10" : "",
1895 imsm_orom_has_raid5(orom
) ? " raid5" : "");
1896 printf(" Chunk Sizes :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
1897 imsm_orom_has_chunk(orom
, 2) ? " 2k" : "",
1898 imsm_orom_has_chunk(orom
, 4) ? " 4k" : "",
1899 imsm_orom_has_chunk(orom
, 8) ? " 8k" : "",
1900 imsm_orom_has_chunk(orom
, 16) ? " 16k" : "",
1901 imsm_orom_has_chunk(orom
, 32) ? " 32k" : "",
1902 imsm_orom_has_chunk(orom
, 64) ? " 64k" : "",
1903 imsm_orom_has_chunk(orom
, 128) ? " 128k" : "",
1904 imsm_orom_has_chunk(orom
, 256) ? " 256k" : "",
1905 imsm_orom_has_chunk(orom
, 512) ? " 512k" : "",
1906 imsm_orom_has_chunk(orom
, 1024*1) ? " 1M" : "",
1907 imsm_orom_has_chunk(orom
, 1024*2) ? " 2M" : "",
1908 imsm_orom_has_chunk(orom
, 1024*4) ? " 4M" : "",
1909 imsm_orom_has_chunk(orom
, 1024*8) ? " 8M" : "",
1910 imsm_orom_has_chunk(orom
, 1024*16) ? " 16M" : "",
1911 imsm_orom_has_chunk(orom
, 1024*32) ? " 32M" : "",
1912 imsm_orom_has_chunk(orom
, 1024*64) ? " 64M" : "");
1913 printf(" 2TB volumes :%s supported\n",
1914 (orom
->attr
& IMSM_OROM_ATTR_2TB
)?"":" not");
1915 printf(" 2TB disks :%s supported\n",
1916 (orom
->attr
& IMSM_OROM_ATTR_2TB_DISK
)?"":" not");
1917 printf(" Max Disks : %d\n", orom
->tds
);
1918 printf(" Max Volumes : %d per array, %d per %s\n",
1919 orom
->vpa
, orom
->vphba
,
1920 imsm_orom_is_nvme(orom
) ? "platform" : "controller");
1924 static void print_imsm_capability_export(const struct imsm_orom
*orom
)
1926 printf("MD_FIRMWARE_TYPE=imsm\n");
1927 if (orom
->major_ver
|| orom
->minor_ver
|| orom
->hotfix_ver
|| orom
->build
)
1928 printf("IMSM_VERSION=%d.%d.%d.%d\n", orom
->major_ver
, orom
->minor_ver
,
1929 orom
->hotfix_ver
, orom
->build
);
1930 printf("IMSM_SUPPORTED_RAID_LEVELS=%s%s%s%s%s\n",
1931 imsm_orom_has_raid0(orom
) ? "raid0 " : "",
1932 imsm_orom_has_raid1(orom
) ? "raid1 " : "",
1933 imsm_orom_has_raid1e(orom
) ? "raid1e " : "",
1934 imsm_orom_has_raid5(orom
) ? "raid10 " : "",
1935 imsm_orom_has_raid10(orom
) ? "raid5 " : "");
1936 printf("IMSM_SUPPORTED_CHUNK_SIZES=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
1937 imsm_orom_has_chunk(orom
, 2) ? "2k " : "",
1938 imsm_orom_has_chunk(orom
, 4) ? "4k " : "",
1939 imsm_orom_has_chunk(orom
, 8) ? "8k " : "",
1940 imsm_orom_has_chunk(orom
, 16) ? "16k " : "",
1941 imsm_orom_has_chunk(orom
, 32) ? "32k " : "",
1942 imsm_orom_has_chunk(orom
, 64) ? "64k " : "",
1943 imsm_orom_has_chunk(orom
, 128) ? "128k " : "",
1944 imsm_orom_has_chunk(orom
, 256) ? "256k " : "",
1945 imsm_orom_has_chunk(orom
, 512) ? "512k " : "",
1946 imsm_orom_has_chunk(orom
, 1024*1) ? "1M " : "",
1947 imsm_orom_has_chunk(orom
, 1024*2) ? "2M " : "",
1948 imsm_orom_has_chunk(orom
, 1024*4) ? "4M " : "",
1949 imsm_orom_has_chunk(orom
, 1024*8) ? "8M " : "",
1950 imsm_orom_has_chunk(orom
, 1024*16) ? "16M " : "",
1951 imsm_orom_has_chunk(orom
, 1024*32) ? "32M " : "",
1952 imsm_orom_has_chunk(orom
, 1024*64) ? "64M " : "");
1953 printf("IMSM_2TB_VOLUMES=%s\n",(orom
->attr
& IMSM_OROM_ATTR_2TB
) ? "yes" : "no");
1954 printf("IMSM_2TB_DISKS=%s\n",(orom
->attr
& IMSM_OROM_ATTR_2TB_DISK
) ? "yes" : "no");
1955 printf("IMSM_MAX_DISKS=%d\n",orom
->tds
);
1956 printf("IMSM_MAX_VOLUMES_PER_ARRAY=%d\n",orom
->vpa
);
1957 printf("IMSM_MAX_VOLUMES_PER_CONTROLLER=%d\n",orom
->vphba
);
1960 static int detail_platform_imsm(int verbose
, int enumerate_only
, char *controller_path
)
1962 /* There are two components to imsm platform support, the ahci SATA
1963 * controller and the option-rom. To find the SATA controller we
1964 * simply look in /sys/bus/pci/drivers/ahci to see if an ahci
1965 * controller with the Intel vendor id is present. This approach
1966 * allows mdadm to leverage the kernel's ahci detection logic, with the
1967 * caveat that if ahci.ko is not loaded mdadm will not be able to
1968 * detect platform raid capabilities. The option-rom resides in a
1969 * platform "Adapter ROM". We scan for its signature to retrieve the
1970 * platform capabilities. If raid support is disabled in the BIOS the
1971 * option-rom capability structure will not be available.
1973 struct sys_dev
*list
, *hba
;
1978 if (enumerate_only
) {
1979 if (check_env("IMSM_NO_PLATFORM"))
1981 list
= find_intel_devices();
1984 for (hba
= list
; hba
; hba
= hba
->next
) {
1985 if (find_imsm_capability(hba
)) {
1995 list
= find_intel_devices();
1998 pr_err("no active Intel(R) RAID controller found.\n");
2000 } else if (verbose
> 0)
2001 print_found_intel_controllers(list
);
2003 for (hba
= list
; hba
; hba
= hba
->next
) {
2004 if (controller_path
&& (compare_paths(hba
->path
, controller_path
) != 0))
2006 if (!find_imsm_capability(hba
)) {
2008 pr_err("imsm capabilities not found for controller: %s (type %s)\n",
2009 hba
->type
== SYS_DEV_VMD
? vmd_domain_to_controller(hba
, buf
) : hba
->path
,
2010 get_sys_dev_type(hba
->type
));
2016 if (controller_path
&& result
== 1) {
2017 pr_err("no active Intel(R) RAID controller found under %s\n",
2022 const struct orom_entry
*entry
;
2024 for (entry
= orom_entries
; entry
; entry
= entry
->next
) {
2025 if (entry
->type
== SYS_DEV_VMD
) {
2026 for (hba
= list
; hba
; hba
= hba
->next
) {
2027 if (hba
->type
== SYS_DEV_VMD
) {
2029 print_imsm_capability(&entry
->orom
);
2030 printf(" I/O Controller : %s (%s)\n",
2031 vmd_domain_to_controller(hba
, buf
), get_sys_dev_type(hba
->type
));
2032 if (print_vmd_attached_devs(hba
)) {
2034 pr_err("failed to get devices attached to VMD domain.\n");
2043 print_imsm_capability(&entry
->orom
);
2044 if (entry
->type
== SYS_DEV_NVME
) {
2045 for (hba
= list
; hba
; hba
= hba
->next
) {
2046 if (hba
->type
== SYS_DEV_NVME
)
2047 printf(" NVMe Device : %s\n", hba
->path
);
2053 struct devid_list
*devid
;
2054 for (devid
= entry
->devid_list
; devid
; devid
= devid
->next
) {
2055 hba
= device_by_id(devid
->devid
);
2059 printf(" I/O Controller : %s (%s)\n",
2060 hba
->path
, get_sys_dev_type(hba
->type
));
2061 if (hba
->type
== SYS_DEV_SATA
) {
2062 host_base
= ahci_get_port_count(hba
->path
, &port_count
);
2063 if (ahci_enumerate_ports(hba
->path
, port_count
, host_base
, verbose
)) {
2065 pr_err("failed to enumerate ports on SATA controller at %s.\n", hba
->pci_id
);
2076 static int export_detail_platform_imsm(int verbose
, char *controller_path
)
2078 struct sys_dev
*list
, *hba
;
2081 list
= find_intel_devices();
2084 pr_err("IMSM_DETAIL_PLATFORM_ERROR=NO_INTEL_DEVICES\n");
2089 for (hba
= list
; hba
; hba
= hba
->next
) {
2090 if (controller_path
&& (compare_paths(hba
->path
,controller_path
) != 0))
2092 if (!find_imsm_capability(hba
) && verbose
> 0) {
2094 pr_err("IMSM_DETAIL_PLATFORM_ERROR=NO_IMSM_CAPABLE_DEVICE_UNDER_%s\n",
2095 hba
->type
== SYS_DEV_VMD
? vmd_domain_to_controller(hba
, buf
) : hba
->path
);
2101 const struct orom_entry
*entry
;
2103 for (entry
= orom_entries
; entry
; entry
= entry
->next
) {
2104 if (entry
->type
== SYS_DEV_VMD
) {
2105 for (hba
= list
; hba
; hba
= hba
->next
)
2106 print_imsm_capability_export(&entry
->orom
);
2109 print_imsm_capability_export(&entry
->orom
);
2117 static int match_home_imsm(struct supertype
*st
, char *homehost
)
2119 /* the imsm metadata format does not specify any host
2120 * identification information. We return -1 since we can never
2121 * confirm nor deny whether a given array is "meant" for this
2122 * host. We rely on compare_super and the 'family_num' fields to
2123 * exclude member disks that do not belong, and we rely on
2124 * mdadm.conf to specify the arrays that should be assembled.
2125 * Auto-assembly may still pick up "foreign" arrays.
2131 static void uuid_from_super_imsm(struct supertype
*st
, int uuid
[4])
2133 /* The uuid returned here is used for:
2134 * uuid to put into bitmap file (Create, Grow)
2135 * uuid for backup header when saving critical section (Grow)
2136 * comparing uuids when re-adding a device into an array
2137 * In these cases the uuid required is that of the data-array,
2138 * not the device-set.
2139 * uuid to recognise same set when adding a missing device back
2140 * to an array. This is a uuid for the device-set.
2142 * For each of these we can make do with a truncated
2143 * or hashed uuid rather than the original, as long as
2145 * In each case the uuid required is that of the data-array,
2146 * not the device-set.
2148 /* imsm does not track uuid's so we synthesis one using sha1 on
2149 * - The signature (Which is constant for all imsm array, but no matter)
2150 * - the orig_family_num of the container
2151 * - the index number of the volume
2152 * - the 'serial' number of the volume.
2153 * Hopefully these are all constant.
2155 struct intel_super
*super
= st
->sb
;
2158 struct sha1_ctx ctx
;
2159 struct imsm_dev
*dev
= NULL
;
2162 /* some mdadm versions failed to set ->orig_family_num, in which
2163 * case fall back to ->family_num. orig_family_num will be
2164 * fixed up with the first metadata update.
2166 family_num
= super
->anchor
->orig_family_num
;
2167 if (family_num
== 0)
2168 family_num
= super
->anchor
->family_num
;
2169 sha1_init_ctx(&ctx
);
2170 sha1_process_bytes(super
->anchor
->sig
, MPB_SIG_LEN
, &ctx
);
2171 sha1_process_bytes(&family_num
, sizeof(__u32
), &ctx
);
2172 if (super
->current_vol
>= 0)
2173 dev
= get_imsm_dev(super
, super
->current_vol
);
2175 __u32 vol
= super
->current_vol
;
2176 sha1_process_bytes(&vol
, sizeof(vol
), &ctx
);
2177 sha1_process_bytes(dev
->volume
, MAX_RAID_SERIAL_LEN
, &ctx
);
2179 sha1_finish_ctx(&ctx
, buf
);
2180 memcpy(uuid
, buf
, 4*4);
2185 get_imsm_numerical_version(struct imsm_super
*mpb
, int *m
, int *p
)
2187 __u8
*v
= get_imsm_version(mpb
);
2188 __u8
*end
= mpb
->sig
+ MAX_SIGNATURE_LENGTH
;
2189 char major
[] = { 0, 0, 0 };
2190 char minor
[] = { 0 ,0, 0 };
2191 char patch
[] = { 0, 0, 0 };
2192 char *ver_parse
[] = { major
, minor
, patch
};
2196 while (*v
!= '\0' && v
< end
) {
2197 if (*v
!= '.' && j
< 2)
2198 ver_parse
[i
][j
++] = *v
;
2206 *m
= strtol(minor
, NULL
, 0);
2207 *p
= strtol(patch
, NULL
, 0);
2211 static __u32
migr_strip_blocks_resync(struct imsm_dev
*dev
)
2213 /* migr_strip_size when repairing or initializing parity */
2214 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
2215 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
2217 switch (get_imsm_raid_level(map
)) {
2222 return 128*1024 >> 9;
2226 static __u32
migr_strip_blocks_rebuild(struct imsm_dev
*dev
)
2228 /* migr_strip_size when rebuilding a degraded disk, no idea why
2229 * this is different than migr_strip_size_resync(), but it's good
2232 struct imsm_map
*map
= get_imsm_map(dev
, MAP_1
);
2233 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
2235 switch (get_imsm_raid_level(map
)) {
2238 if (map
->num_members
% map
->num_domains
== 0)
2239 return 128*1024 >> 9;
2243 return max((__u32
) 64*1024 >> 9, chunk
);
2245 return 128*1024 >> 9;
2249 static __u32
num_stripes_per_unit_resync(struct imsm_dev
*dev
)
2251 struct imsm_map
*lo
= get_imsm_map(dev
, MAP_0
);
2252 struct imsm_map
*hi
= get_imsm_map(dev
, MAP_1
);
2253 __u32 lo_chunk
= __le32_to_cpu(lo
->blocks_per_strip
);
2254 __u32 hi_chunk
= __le32_to_cpu(hi
->blocks_per_strip
);
2256 return max((__u32
) 1, hi_chunk
/ lo_chunk
);
2259 static __u32
num_stripes_per_unit_rebuild(struct imsm_dev
*dev
)
2261 struct imsm_map
*lo
= get_imsm_map(dev
, MAP_0
);
2262 int level
= get_imsm_raid_level(lo
);
2264 if (level
== 1 || level
== 10) {
2265 struct imsm_map
*hi
= get_imsm_map(dev
, MAP_1
);
2267 return hi
->num_domains
;
2269 return num_stripes_per_unit_resync(dev
);
2272 static __u8
imsm_num_data_members(struct imsm_dev
*dev
, int second_map
)
2274 /* named 'imsm_' because raid0, raid1 and raid10
2275 * counter-intuitively have the same number of data disks
2277 struct imsm_map
*map
= get_imsm_map(dev
, second_map
);
2279 switch (get_imsm_raid_level(map
)) {
2281 return map
->num_members
;
2285 return map
->num_members
/2;
2287 return map
->num_members
- 1;
2289 dprintf("unsupported raid level\n");
2294 static __u32
parity_segment_depth(struct imsm_dev
*dev
)
2296 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
2297 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
2299 switch(get_imsm_raid_level(map
)) {
2302 return chunk
* map
->num_domains
;
2304 return chunk
* map
->num_members
;
2310 static __u32
map_migr_block(struct imsm_dev
*dev
, __u32 block
)
2312 struct imsm_map
*map
= get_imsm_map(dev
, MAP_1
);
2313 __u32 chunk
= __le32_to_cpu(map
->blocks_per_strip
);
2314 __u32 strip
= block
/ chunk
;
2316 switch (get_imsm_raid_level(map
)) {
2319 __u32 vol_strip
= (strip
* map
->num_domains
) + 1;
2320 __u32 vol_stripe
= vol_strip
/ map
->num_members
;
2322 return vol_stripe
* chunk
+ block
% chunk
;
2324 __u32 stripe
= strip
/ (map
->num_members
- 1);
2326 return stripe
* chunk
+ block
% chunk
;
2333 static __u64
blocks_per_migr_unit(struct intel_super
*super
,
2334 struct imsm_dev
*dev
)
2336 /* calculate the conversion factor between per member 'blocks'
2337 * (md/{resync,rebuild}_start) and imsm migration units, return
2338 * 0 for the 'not migrating' and 'unsupported migration' cases
2340 if (!dev
->vol
.migr_state
)
2343 switch (migr_type(dev
)) {
2344 case MIGR_GEN_MIGR
: {
2345 struct migr_record
*migr_rec
= super
->migr_rec
;
2346 return __le32_to_cpu(migr_rec
->blocks_per_unit
);
2351 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
2352 __u32 stripes_per_unit
;
2353 __u32 blocks_per_unit
;
2362 /* yes, this is really the translation of migr_units to
2363 * per-member blocks in the 'resync' case
2365 stripes_per_unit
= num_stripes_per_unit_resync(dev
);
2366 migr_chunk
= migr_strip_blocks_resync(dev
);
2367 disks
= imsm_num_data_members(dev
, MAP_0
);
2368 blocks_per_unit
= stripes_per_unit
* migr_chunk
* disks
;
2369 stripe
= __le16_to_cpu(map
->blocks_per_strip
) * disks
;
2370 segment
= blocks_per_unit
/ stripe
;
2371 block_rel
= blocks_per_unit
- segment
* stripe
;
2372 parity_depth
= parity_segment_depth(dev
);
2373 block_map
= map_migr_block(dev
, block_rel
);
2374 return block_map
+ parity_depth
* segment
;
2376 case MIGR_REBUILD
: {
2377 __u32 stripes_per_unit
;
2380 stripes_per_unit
= num_stripes_per_unit_rebuild(dev
);
2381 migr_chunk
= migr_strip_blocks_rebuild(dev
);
2382 return migr_chunk
* stripes_per_unit
;
2384 case MIGR_STATE_CHANGE
:
2390 static int imsm_level_to_layout(int level
)
2398 return ALGORITHM_LEFT_ASYMMETRIC
;
2405 /*******************************************************************************
2406 * Function: read_imsm_migr_rec
2407 * Description: Function reads imsm migration record from last sector of disk
2409 * fd : disk descriptor
2410 * super : metadata info
2414 ******************************************************************************/
2415 static int read_imsm_migr_rec(int fd
, struct intel_super
*super
)
2418 unsigned long long dsize
;
2420 get_dev_size(fd
, NULL
, &dsize
);
2421 if (lseek64(fd
, dsize
- MIGR_REC_POSITION
, SEEK_SET
) < 0) {
2422 pr_err("Cannot seek to anchor block: %s\n",
2426 if (read(fd
, super
->migr_rec_buf
, MIGR_REC_BUF_SIZE
) !=
2427 MIGR_REC_BUF_SIZE
) {
2428 pr_err("Cannot read migr record block: %s\n",
2438 static struct imsm_dev
*imsm_get_device_during_migration(
2439 struct intel_super
*super
)
2442 struct intel_dev
*dv
;
2444 for (dv
= super
->devlist
; dv
; dv
= dv
->next
) {
2445 if (is_gen_migration(dv
->dev
))
2451 /*******************************************************************************
2452 * Function: load_imsm_migr_rec
2453 * Description: Function reads imsm migration record (it is stored at the last
2456 * super : imsm internal array info
2457 * info : general array info
2461 * -2 : no migration in progress
2462 ******************************************************************************/
2463 static int load_imsm_migr_rec(struct intel_super
*super
, struct mdinfo
*info
)
2470 struct imsm_dev
*dev
;
2471 struct imsm_map
*map
;
2474 /* find map under migration */
2475 dev
= imsm_get_device_during_migration(super
);
2476 /* nothing to load,no migration in progress?
2480 map
= get_imsm_map(dev
, MAP_0
);
2483 for (sd
= info
->devs
; sd
; sd
= sd
->next
) {
2484 /* skip spare and failed disks
2486 if (sd
->disk
.raid_disk
< 0)
2488 /* read only from one of the first two slots */
2490 slot
= get_imsm_disk_slot(map
,
2491 sd
->disk
.raid_disk
);
2492 if ((map
== NULL
) || (slot
> 1) || (slot
< 0))
2495 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
2496 fd
= dev_open(nm
, O_RDONLY
);
2502 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
2503 /* skip spare and failed disks
2507 /* read only from one of the first two slots */
2509 slot
= get_imsm_disk_slot(map
, dl
->index
);
2510 if ((map
== NULL
) || (slot
> 1) || (slot
< 0))
2512 sprintf(nm
, "%d:%d", dl
->major
, dl
->minor
);
2513 fd
= dev_open(nm
, O_RDONLY
);
2520 retval
= read_imsm_migr_rec(fd
, super
);
2529 /*******************************************************************************
2530 * function: imsm_create_metadata_checkpoint_update
2531 * Description: It creates update for checkpoint change.
2533 * super : imsm internal array info
2534 * u : pointer to prepared update
2537 * If length is equal to 0, input pointer u contains no update
2538 ******************************************************************************/
2539 static int imsm_create_metadata_checkpoint_update(
2540 struct intel_super
*super
,
2541 struct imsm_update_general_migration_checkpoint
**u
)
2544 int update_memory_size
= 0;
2546 dprintf("(enter)\n");
2552 /* size of all update data without anchor */
2553 update_memory_size
=
2554 sizeof(struct imsm_update_general_migration_checkpoint
);
2556 *u
= xcalloc(1, update_memory_size
);
2558 dprintf("error: cannot get memory\n");
2561 (*u
)->type
= update_general_migration_checkpoint
;
2562 (*u
)->curr_migr_unit
= __le32_to_cpu(super
->migr_rec
->curr_migr_unit
);
2563 dprintf("prepared for %u\n", (*u
)->curr_migr_unit
);
2565 return update_memory_size
;
2568 static void imsm_update_metadata_locally(struct supertype
*st
,
2569 void *buf
, int len
);
2571 /*******************************************************************************
2572 * Function: write_imsm_migr_rec
2573 * Description: Function writes imsm migration record
2574 * (at the last sector of disk)
2576 * super : imsm internal array info
2580 ******************************************************************************/
2581 static int write_imsm_migr_rec(struct supertype
*st
)
2583 struct intel_super
*super
= st
->sb
;
2584 unsigned long long dsize
;
2590 struct imsm_update_general_migration_checkpoint
*u
;
2591 struct imsm_dev
*dev
;
2592 struct imsm_map
*map
;
2594 /* find map under migration */
2595 dev
= imsm_get_device_during_migration(super
);
2596 /* if no migration, write buffer anyway to clear migr_record
2597 * on disk based on first available device
2600 dev
= get_imsm_dev(super
, super
->current_vol
< 0 ? 0 :
2601 super
->current_vol
);
2603 map
= get_imsm_map(dev
, MAP_0
);
2605 for (sd
= super
->disks
; sd
; sd
= sd
->next
) {
2608 /* skip failed and spare devices */
2611 /* write to 2 first slots only */
2613 slot
= get_imsm_disk_slot(map
, sd
->index
);
2614 if ((map
== NULL
) || (slot
> 1) || (slot
< 0))
2617 sprintf(nm
, "%d:%d", sd
->major
, sd
->minor
);
2618 fd
= dev_open(nm
, O_RDWR
);
2621 get_dev_size(fd
, NULL
, &dsize
);
2622 if (lseek64(fd
, dsize
- MIGR_REC_POSITION
, SEEK_SET
) < 0) {
2623 pr_err("Cannot seek to anchor block: %s\n",
2627 if (write(fd
, super
->migr_rec_buf
, MIGR_REC_BUF_SIZE
) !=
2628 MIGR_REC_BUF_SIZE
) {
2629 pr_err("Cannot write migr record block: %s\n",
2636 /* update checkpoint information in metadata */
2637 len
= imsm_create_metadata_checkpoint_update(super
, &u
);
2640 dprintf("imsm: Cannot prepare update\n");
2643 /* update metadata locally */
2644 imsm_update_metadata_locally(st
, u
, len
);
2645 /* and possibly remotely */
2646 if (st
->update_tail
) {
2647 append_metadata_update(st
, u
, len
);
2648 /* during reshape we do all work inside metadata handler
2649 * manage_reshape(), so metadata update has to be triggered
2652 flush_metadata_updates(st
);
2653 st
->update_tail
= &st
->updates
;
2663 #endif /* MDASSEMBLE */
2665 /* spare/missing disks activations are not allowe when
2666 * array/container performs reshape operation, because
2667 * all arrays in container works on the same disks set
2669 int imsm_reshape_blocks_arrays_changes(struct intel_super
*super
)
2672 struct intel_dev
*i_dev
;
2673 struct imsm_dev
*dev
;
2675 /* check whole container
2677 for (i_dev
= super
->devlist
; i_dev
; i_dev
= i_dev
->next
) {
2679 if (is_gen_migration(dev
)) {
2680 /* No repair during any migration in container
2688 static unsigned long long imsm_component_size_aligment_check(int level
,
2690 unsigned long long component_size
)
2692 unsigned int component_size_alligment
;
2694 /* check component size aligment
2696 component_size_alligment
= component_size
% (chunk_size
/512);
2698 dprintf("(Level: %i, chunk_size = %i, component_size = %llu), component_size_alligment = %u\n",
2699 level
, chunk_size
, component_size
,
2700 component_size_alligment
);
2702 if (component_size_alligment
&& (level
!= 1) && (level
!= UnSet
)) {
2703 dprintf("imsm: reported component size alligned from %llu ",
2705 component_size
-= component_size_alligment
;
2706 dprintf_cont("to %llu (%i).\n",
2707 component_size
, component_size_alligment
);
2710 return component_size
;
2713 static void getinfo_super_imsm_volume(struct supertype
*st
, struct mdinfo
*info
, char *dmap
)
2715 struct intel_super
*super
= st
->sb
;
2716 struct migr_record
*migr_rec
= super
->migr_rec
;
2717 struct imsm_dev
*dev
= get_imsm_dev(super
, super
->current_vol
);
2718 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
2719 struct imsm_map
*prev_map
= get_imsm_map(dev
, MAP_1
);
2720 struct imsm_map
*map_to_analyse
= map
;
2722 int map_disks
= info
->array
.raid_disks
;
2724 memset(info
, 0, sizeof(*info
));
2726 map_to_analyse
= prev_map
;
2728 dl
= super
->current_disk
;
2730 info
->container_member
= super
->current_vol
;
2731 info
->array
.raid_disks
= map
->num_members
;
2732 info
->array
.level
= get_imsm_raid_level(map_to_analyse
);
2733 info
->array
.layout
= imsm_level_to_layout(info
->array
.level
);
2734 info
->array
.md_minor
= -1;
2735 info
->array
.ctime
= 0;
2736 info
->array
.utime
= 0;
2737 info
->array
.chunk_size
=
2738 __le16_to_cpu(map_to_analyse
->blocks_per_strip
) << 9;
2739 info
->array
.state
= !dev
->vol
.dirty
;
2740 info
->custom_array_size
= __le32_to_cpu(dev
->size_high
);
2741 info
->custom_array_size
<<= 32;
2742 info
->custom_array_size
|= __le32_to_cpu(dev
->size_low
);
2743 info
->recovery_blocked
= imsm_reshape_blocks_arrays_changes(st
->sb
);
2745 if (is_gen_migration(dev
)) {
2746 info
->reshape_active
= 1;
2747 info
->new_level
= get_imsm_raid_level(map
);
2748 info
->new_layout
= imsm_level_to_layout(info
->new_level
);
2749 info
->new_chunk
= __le16_to_cpu(map
->blocks_per_strip
) << 9;
2750 info
->delta_disks
= map
->num_members
- prev_map
->num_members
;
2751 if (info
->delta_disks
) {
2752 /* this needs to be applied to every array
2755 info
->reshape_active
= CONTAINER_RESHAPE
;
2757 /* We shape information that we give to md might have to be
2758 * modify to cope with md's requirement for reshaping arrays.
2759 * For example, when reshaping a RAID0, md requires it to be
2760 * presented as a degraded RAID4.
2761 * Also if a RAID0 is migrating to a RAID5 we need to specify
2762 * the array as already being RAID5, but the 'before' layout
2763 * is a RAID4-like layout.
2765 switch (info
->array
.level
) {
2767 switch(info
->new_level
) {
2769 /* conversion is happening as RAID4 */
2770 info
->array
.level
= 4;
2771 info
->array
.raid_disks
+= 1;
2774 /* conversion is happening as RAID5 */
2775 info
->array
.level
= 5;
2776 info
->array
.layout
= ALGORITHM_PARITY_N
;
2777 info
->delta_disks
-= 1;
2780 /* FIXME error message */
2781 info
->array
.level
= UnSet
;
2787 info
->new_level
= UnSet
;
2788 info
->new_layout
= UnSet
;
2789 info
->new_chunk
= info
->array
.chunk_size
;
2790 info
->delta_disks
= 0;
2794 info
->disk
.major
= dl
->major
;
2795 info
->disk
.minor
= dl
->minor
;
2796 info
->disk
.number
= dl
->index
;
2797 info
->disk
.raid_disk
= get_imsm_disk_slot(map_to_analyse
,
2801 info
->data_offset
= pba_of_lba0(map_to_analyse
);
2802 info
->component_size
= blocks_per_member(map_to_analyse
);
2804 info
->component_size
= imsm_component_size_aligment_check(
2806 info
->array
.chunk_size
,
2807 info
->component_size
);
2809 memset(info
->uuid
, 0, sizeof(info
->uuid
));
2810 info
->recovery_start
= MaxSector
;
2812 info
->reshape_progress
= 0;
2813 info
->resync_start
= MaxSector
;
2814 if ((map_to_analyse
->map_state
== IMSM_T_STATE_UNINITIALIZED
||
2816 imsm_reshape_blocks_arrays_changes(super
) == 0) {
2817 info
->resync_start
= 0;
2819 if (dev
->vol
.migr_state
) {
2820 switch (migr_type(dev
)) {
2823 __u64 blocks_per_unit
= blocks_per_migr_unit(super
,
2825 __u64 units
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
2827 info
->resync_start
= blocks_per_unit
* units
;
2830 case MIGR_GEN_MIGR
: {
2831 __u64 blocks_per_unit
= blocks_per_migr_unit(super
,
2833 __u64 units
= __le32_to_cpu(migr_rec
->curr_migr_unit
);
2834 unsigned long long array_blocks
;
2837 if (__le32_to_cpu(migr_rec
->ascending_migr
) &&
2839 (__le32_to_cpu(migr_rec
->num_migr_units
)-1)) &&
2840 (super
->migr_rec
->rec_status
==
2841 __cpu_to_le32(UNIT_SRC_IN_CP_AREA
)))
2844 info
->reshape_progress
= blocks_per_unit
* units
;
2846 dprintf("IMSM: General Migration checkpoint : %llu (%llu) -> read reshape progress : %llu\n",
2847 (unsigned long long)units
,
2848 (unsigned long long)blocks_per_unit
,
2849 info
->reshape_progress
);
2851 used_disks
= imsm_num_data_members(dev
, MAP_1
);
2852 if (used_disks
> 0) {
2853 array_blocks
= blocks_per_member(map
) *
2855 /* round array size down to closest MB
2857 info
->custom_array_size
= (array_blocks
2858 >> SECT_PER_MB_SHIFT
)
2859 << SECT_PER_MB_SHIFT
;
2863 /* we could emulate the checkpointing of
2864 * 'sync_action=check' migrations, but for now
2865 * we just immediately complete them
2868 /* this is handled by container_content_imsm() */
2869 case MIGR_STATE_CHANGE
:
2870 /* FIXME handle other migrations */
2872 /* we are not dirty, so... */
2873 info
->resync_start
= MaxSector
;
2877 strncpy(info
->name
, (char *) dev
->volume
, MAX_RAID_SERIAL_LEN
);
2878 info
->name
[MAX_RAID_SERIAL_LEN
] = 0;
2880 info
->array
.major_version
= -1;
2881 info
->array
.minor_version
= -2;
2882 sprintf(info
->text_version
, "/%s/%d", st
->container_devnm
, info
->container_member
);
2883 info
->safe_mode_delay
= 4000; /* 4 secs like the Matrix driver */
2884 uuid_from_super_imsm(st
, info
->uuid
);
2888 for (i
=0; i
<map_disks
; i
++) {
2890 if (i
< info
->array
.raid_disks
) {
2891 struct imsm_disk
*dsk
;
2892 j
= get_imsm_disk_idx(dev
, i
, MAP_X
);
2893 dsk
= get_imsm_disk(super
, j
);
2894 if (dsk
&& (dsk
->status
& CONFIGURED_DISK
))
2901 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
,
2902 int failed
, int look_in_map
);
2904 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
,
2908 static void manage_second_map(struct intel_super
*super
, struct imsm_dev
*dev
)
2910 if (is_gen_migration(dev
)) {
2913 struct imsm_map
*map2
= get_imsm_map(dev
, MAP_1
);
2915 failed
= imsm_count_failed(super
, dev
, MAP_1
);
2916 map_state
= imsm_check_degraded(super
, dev
, failed
, MAP_1
);
2917 if (map2
->map_state
!= map_state
) {
2918 map2
->map_state
= map_state
;
2919 super
->updates_pending
++;
2925 static struct imsm_disk
*get_imsm_missing(struct intel_super
*super
, __u8 index
)
2929 for (d
= super
->missing
; d
; d
= d
->next
)
2930 if (d
->index
== index
)
2935 static void getinfo_super_imsm(struct supertype
*st
, struct mdinfo
*info
, char *map
)
2937 struct intel_super
*super
= st
->sb
;
2938 struct imsm_disk
*disk
;
2939 int map_disks
= info
->array
.raid_disks
;
2940 int max_enough
= -1;
2942 struct imsm_super
*mpb
;
2944 if (super
->current_vol
>= 0) {
2945 getinfo_super_imsm_volume(st
, info
, map
);
2948 memset(info
, 0, sizeof(*info
));
2950 /* Set raid_disks to zero so that Assemble will always pull in valid
2953 info
->array
.raid_disks
= 0;
2954 info
->array
.level
= LEVEL_CONTAINER
;
2955 info
->array
.layout
= 0;
2956 info
->array
.md_minor
= -1;
2957 info
->array
.ctime
= 0; /* N/A for imsm */
2958 info
->array
.utime
= 0;
2959 info
->array
.chunk_size
= 0;
2961 info
->disk
.major
= 0;
2962 info
->disk
.minor
= 0;
2963 info
->disk
.raid_disk
= -1;
2964 info
->reshape_active
= 0;
2965 info
->array
.major_version
= -1;
2966 info
->array
.minor_version
= -2;
2967 strcpy(info
->text_version
, "imsm");
2968 info
->safe_mode_delay
= 0;
2969 info
->disk
.number
= -1;
2970 info
->disk
.state
= 0;
2972 info
->recovery_start
= MaxSector
;
2973 info
->recovery_blocked
= imsm_reshape_blocks_arrays_changes(st
->sb
);
2975 /* do we have the all the insync disks that we expect? */
2976 mpb
= super
->anchor
;
2978 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
2979 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
2980 int failed
, enough
, j
, missing
= 0;
2981 struct imsm_map
*map
;
2984 failed
= imsm_count_failed(super
, dev
, MAP_0
);
2985 state
= imsm_check_degraded(super
, dev
, failed
, MAP_0
);
2986 map
= get_imsm_map(dev
, MAP_0
);
2988 /* any newly missing disks?
2989 * (catches single-degraded vs double-degraded)
2991 for (j
= 0; j
< map
->num_members
; j
++) {
2992 __u32 ord
= get_imsm_ord_tbl_ent(dev
, j
, MAP_0
);
2993 __u32 idx
= ord_to_idx(ord
);
2995 if (!(ord
& IMSM_ORD_REBUILD
) &&
2996 get_imsm_missing(super
, idx
)) {
3002 if (state
== IMSM_T_STATE_FAILED
)
3004 else if (state
== IMSM_T_STATE_DEGRADED
&&
3005 (state
!= map
->map_state
|| missing
))
3007 else /* we're normal, or already degraded */
3009 if (is_gen_migration(dev
) && missing
) {
3010 /* during general migration we need all disks
3011 * that process is running on.
3012 * No new missing disk is allowed.
3016 /* no more checks necessary
3020 /* in the missing/failed disk case check to see
3021 * if at least one array is runnable
3023 max_enough
= max(max_enough
, enough
);
3025 dprintf("enough: %d\n", max_enough
);
3026 info
->container_enough
= max_enough
;
3029 __u32 reserved
= imsm_reserved_sectors(super
, super
->disks
);
3031 disk
= &super
->disks
->disk
;
3032 info
->data_offset
= total_blocks(&super
->disks
->disk
) - reserved
;
3033 info
->component_size
= reserved
;
3034 info
->disk
.state
= is_configured(disk
) ? (1 << MD_DISK_ACTIVE
) : 0;
3035 /* we don't change info->disk.raid_disk here because
3036 * this state will be finalized in mdmon after we have
3037 * found the 'most fresh' version of the metadata
3039 info
->disk
.state
|= is_failed(disk
) ? (1 << MD_DISK_FAULTY
) : 0;
3040 info
->disk
.state
|= is_spare(disk
) ? 0 : (1 << MD_DISK_SYNC
);
3043 /* only call uuid_from_super_imsm when this disk is part of a populated container,
3044 * ->compare_super may have updated the 'num_raid_devs' field for spares
3046 if (info
->disk
.state
& (1 << MD_DISK_SYNC
) || super
->anchor
->num_raid_devs
)
3047 uuid_from_super_imsm(st
, info
->uuid
);
3049 memcpy(info
->uuid
, uuid_zero
, sizeof(uuid_zero
));
3051 /* I don't know how to compute 'map' on imsm, so use safe default */
3054 for (i
= 0; i
< map_disks
; i
++)
3060 /* allocates memory and fills disk in mdinfo structure
3061 * for each disk in array */
3062 struct mdinfo
*getinfo_super_disks_imsm(struct supertype
*st
)
3064 struct mdinfo
*mddev
;
3065 struct intel_super
*super
= st
->sb
;
3066 struct imsm_disk
*disk
;
3069 if (!super
|| !super
->disks
)
3072 mddev
= xcalloc(1, sizeof(*mddev
));
3076 tmp
= xcalloc(1, sizeof(*tmp
));
3078 tmp
->next
= mddev
->devs
;
3080 tmp
->disk
.number
= count
++;
3081 tmp
->disk
.major
= dl
->major
;
3082 tmp
->disk
.minor
= dl
->minor
;
3083 tmp
->disk
.state
= is_configured(disk
) ?
3084 (1 << MD_DISK_ACTIVE
) : 0;
3085 tmp
->disk
.state
|= is_failed(disk
) ? (1 << MD_DISK_FAULTY
) : 0;
3086 tmp
->disk
.state
|= is_spare(disk
) ? 0 : (1 << MD_DISK_SYNC
);
3087 tmp
->disk
.raid_disk
= -1;
3093 static int update_super_imsm(struct supertype
*st
, struct mdinfo
*info
,
3094 char *update
, char *devname
, int verbose
,
3095 int uuid_set
, char *homehost
)
3097 /* For 'assemble' and 'force' we need to return non-zero if any
3098 * change was made. For others, the return value is ignored.
3099 * Update options are:
3100 * force-one : This device looks a bit old but needs to be included,
3101 * update age info appropriately.
3102 * assemble: clear any 'faulty' flag to allow this device to
3104 * force-array: Array is degraded but being forced, mark it clean
3105 * if that will be needed to assemble it.
3107 * newdev: not used ????
3108 * grow: Array has gained a new device - this is currently for
3110 * resync: mark as dirty so a resync will happen.
3111 * name: update the name - preserving the homehost
3112 * uuid: Change the uuid of the array to match watch is given
3114 * Following are not relevant for this imsm:
3115 * sparc2.2 : update from old dodgey metadata
3116 * super-minor: change the preferred_minor number
3117 * summaries: update redundant counters.
3118 * homehost: update the recorded homehost
3119 * _reshape_progress: record new reshape_progress position.
3122 struct intel_super
*super
= st
->sb
;
3123 struct imsm_super
*mpb
;
3125 /* we can only update container info */
3126 if (!super
|| super
->current_vol
>= 0 || !super
->anchor
)
3129 mpb
= super
->anchor
;
3131 if (strcmp(update
, "uuid") == 0) {
3132 /* We take this to mean that the family_num should be updated.
3133 * However that is much smaller than the uuid so we cannot really
3134 * allow an explicit uuid to be given. And it is hard to reliably
3136 * So if !uuid_set we know the current uuid is random and just used
3137 * the first 'int' and copy it to the other 3 positions.
3138 * Otherwise we require the 4 'int's to be the same as would be the
3139 * case if we are using a random uuid. So an explicit uuid will be
3140 * accepted as long as all for ints are the same... which shouldn't hurt
3143 info
->uuid
[1] = info
->uuid
[2] = info
->uuid
[3] = info
->uuid
[0];
3146 if (info
->uuid
[0] != info
->uuid
[1] ||
3147 info
->uuid
[1] != info
->uuid
[2] ||
3148 info
->uuid
[2] != info
->uuid
[3])
3154 mpb
->orig_family_num
= info
->uuid
[0];
3155 } else if (strcmp(update
, "assemble") == 0)
3160 /* successful update? recompute checksum */
3162 mpb
->check_sum
= __le32_to_cpu(__gen_imsm_checksum(mpb
));
3167 static size_t disks_to_mpb_size(int disks
)
3171 size
= sizeof(struct imsm_super
);
3172 size
+= (disks
- 1) * sizeof(struct imsm_disk
);
3173 size
+= 2 * sizeof(struct imsm_dev
);
3174 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
3175 size
+= (4 - 2) * sizeof(struct imsm_map
);
3176 /* 4 possible disk_ord_tbl's */
3177 size
+= 4 * (disks
- 1) * sizeof(__u32
);
3182 static __u64
avail_size_imsm(struct supertype
*st
, __u64 devsize
,
3183 unsigned long long data_offset
)
3185 if (devsize
< (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
))
3188 return devsize
- (MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
);
3191 static void free_devlist(struct intel_super
*super
)
3193 struct intel_dev
*dv
;
3195 while (super
->devlist
) {
3196 dv
= super
->devlist
->next
;
3197 free(super
->devlist
->dev
);
3198 free(super
->devlist
);
3199 super
->devlist
= dv
;
3203 static void imsm_copy_dev(struct imsm_dev
*dest
, struct imsm_dev
*src
)
3205 memcpy(dest
, src
, sizeof_imsm_dev(src
, 0));
3208 static int compare_super_imsm(struct supertype
*st
, struct supertype
*tst
)
3212 * 0 same, or first was empty, and second was copied
3213 * 1 second had wrong number
3215 * 3 wrong other info
3217 struct intel_super
*first
= st
->sb
;
3218 struct intel_super
*sec
= tst
->sb
;
3225 /* in platform dependent environment test if the disks
3226 * use the same Intel hba
3227 * If not on Intel hba at all, allow anything.
3229 if (!check_env("IMSM_NO_PLATFORM") && first
->hba
&& sec
->hba
) {
3230 if (first
->hba
->type
!= sec
->hba
->type
) {
3232 "HBAs of devices do not match %s != %s\n",
3233 get_sys_dev_type(first
->hba
->type
),
3234 get_sys_dev_type(sec
->hba
->type
));
3237 if (first
->orom
!= sec
->orom
) {
3239 "HBAs of devices do not match %s != %s\n",
3240 first
->hba
->pci_id
, sec
->hba
->pci_id
);
3245 /* if an anchor does not have num_raid_devs set then it is a free
3248 if (first
->anchor
->num_raid_devs
> 0 &&
3249 sec
->anchor
->num_raid_devs
> 0) {
3250 /* Determine if these disks might ever have been
3251 * related. Further disambiguation can only take place
3252 * in load_super_imsm_all
3254 __u32 first_family
= first
->anchor
->orig_family_num
;
3255 __u32 sec_family
= sec
->anchor
->orig_family_num
;
3257 if (memcmp(first
->anchor
->sig
, sec
->anchor
->sig
,
3258 MAX_SIGNATURE_LENGTH
) != 0)
3261 if (first_family
== 0)
3262 first_family
= first
->anchor
->family_num
;
3263 if (sec_family
== 0)
3264 sec_family
= sec
->anchor
->family_num
;
3266 if (first_family
!= sec_family
)
3271 /* if 'first' is a spare promote it to a populated mpb with sec's
3274 if (first
->anchor
->num_raid_devs
== 0 &&
3275 sec
->anchor
->num_raid_devs
> 0) {
3277 struct intel_dev
*dv
;
3278 struct imsm_dev
*dev
;
3280 /* we need to copy raid device info from sec if an allocation
3281 * fails here we don't associate the spare
3283 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++) {
3284 dv
= xmalloc(sizeof(*dv
));
3285 dev
= xmalloc(sizeof_imsm_dev(get_imsm_dev(sec
, i
), 1));
3288 dv
->next
= first
->devlist
;
3289 first
->devlist
= dv
;
3291 if (i
< sec
->anchor
->num_raid_devs
) {
3292 /* allocation failure */
3293 free_devlist(first
);
3294 pr_err("imsm: failed to associate spare\n");
3297 first
->anchor
->num_raid_devs
= sec
->anchor
->num_raid_devs
;
3298 first
->anchor
->orig_family_num
= sec
->anchor
->orig_family_num
;
3299 first
->anchor
->family_num
= sec
->anchor
->family_num
;
3300 memcpy(first
->anchor
->sig
, sec
->anchor
->sig
, MAX_SIGNATURE_LENGTH
);
3301 for (i
= 0; i
< sec
->anchor
->num_raid_devs
; i
++)
3302 imsm_copy_dev(get_imsm_dev(first
, i
), get_imsm_dev(sec
, i
));
3308 static void fd2devname(int fd
, char *name
)
3312 char dname
[PATH_MAX
];
3317 if (fstat(fd
, &st
) != 0)
3319 sprintf(path
, "/sys/dev/block/%d:%d",
3320 major(st
.st_rdev
), minor(st
.st_rdev
));
3322 rv
= readlink(path
, dname
, sizeof(dname
)-1);
3327 nm
= strrchr(dname
, '/');
3330 snprintf(name
, MAX_RAID_SERIAL_LEN
, "/dev/%s", nm
);
3334 extern int scsi_get_serial(int fd
, void *buf
, size_t buf_len
);
3336 static int imsm_read_serial(int fd
, char *devname
,
3337 __u8 serial
[MAX_RAID_SERIAL_LEN
])
3339 unsigned char scsi_serial
[255];
3348 memset(scsi_serial
, 0, sizeof(scsi_serial
));
3350 rv
= scsi_get_serial(fd
, scsi_serial
, sizeof(scsi_serial
));
3352 if (rv
&& check_env("IMSM_DEVNAME_AS_SERIAL")) {
3353 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
3354 fd2devname(fd
, (char *) serial
);
3360 pr_err("Failed to retrieve serial for %s\n",
3365 rsp_len
= scsi_serial
[3];
3368 pr_err("Failed to retrieve serial for %s\n",
3372 rsp_buf
= (char *) &scsi_serial
[4];
3374 /* trim all whitespace and non-printable characters and convert
3377 for (i
= 0, dest
= rsp_buf
; i
< rsp_len
; i
++) {
3380 /* ':' is reserved for use in placeholder serial
3381 * numbers for missing disks
3389 len
= dest
- rsp_buf
;
3392 /* truncate leading characters */
3393 if (len
> MAX_RAID_SERIAL_LEN
) {
3394 dest
+= len
- MAX_RAID_SERIAL_LEN
;
3395 len
= MAX_RAID_SERIAL_LEN
;
3398 memset(serial
, 0, MAX_RAID_SERIAL_LEN
);
3399 memcpy(serial
, dest
, len
);
3404 static int serialcmp(__u8
*s1
, __u8
*s2
)
3406 return strncmp((char *) s1
, (char *) s2
, MAX_RAID_SERIAL_LEN
);
3409 static void serialcpy(__u8
*dest
, __u8
*src
)
3411 strncpy((char *) dest
, (char *) src
, MAX_RAID_SERIAL_LEN
);
3414 static struct dl
*serial_to_dl(__u8
*serial
, struct intel_super
*super
)
3418 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
3419 if (serialcmp(dl
->serial
, serial
) == 0)
3425 static struct imsm_disk
*
3426 __serial_to_disk(__u8
*serial
, struct imsm_super
*mpb
, int *idx
)
3430 for (i
= 0; i
< mpb
->num_disks
; i
++) {
3431 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, i
);
3433 if (serialcmp(disk
->serial
, serial
) == 0) {
3444 load_imsm_disk(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
3446 struct imsm_disk
*disk
;
3451 __u8 serial
[MAX_RAID_SERIAL_LEN
];
3453 rv
= imsm_read_serial(fd
, devname
, serial
);
3458 dl
= xcalloc(1, sizeof(*dl
));
3461 dl
->major
= major(stb
.st_rdev
);
3462 dl
->minor
= minor(stb
.st_rdev
);
3463 dl
->next
= super
->disks
;
3464 dl
->fd
= keep_fd
? fd
: -1;
3465 assert(super
->disks
== NULL
);
3467 serialcpy(dl
->serial
, serial
);
3470 fd2devname(fd
, name
);
3472 dl
->devname
= xstrdup(devname
);
3474 dl
->devname
= xstrdup(name
);
3476 /* look up this disk's index in the current anchor */
3477 disk
= __serial_to_disk(dl
->serial
, super
->anchor
, &dl
->index
);
3480 /* only set index on disks that are a member of a
3481 * populated contianer, i.e. one with raid_devs
3483 if (is_failed(&dl
->disk
))
3485 else if (is_spare(&dl
->disk
))
3493 /* When migrating map0 contains the 'destination' state while map1
3494 * contains the current state. When not migrating map0 contains the
3495 * current state. This routine assumes that map[0].map_state is set to
3496 * the current array state before being called.
3498 * Migration is indicated by one of the following states
3499 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
3500 * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal
3501 * map1state=unitialized)
3502 * 3/ Repair (Resync) (migr_state=1 migr_type=MIGR_REPAIR map0state=normal
3504 * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
3505 * map1state=degraded)
3506 * 5/ Migration (mig_state=1 migr_type=MIGR_GEN_MIGR map0state=normal
3509 static void migrate(struct imsm_dev
*dev
, struct intel_super
*super
,
3510 __u8 to_state
, int migr_type
)
3512 struct imsm_map
*dest
;
3513 struct imsm_map
*src
= get_imsm_map(dev
, MAP_0
);
3515 dev
->vol
.migr_state
= 1;
3516 set_migr_type(dev
, migr_type
);
3517 dev
->vol
.curr_migr_unit
= 0;
3518 dest
= get_imsm_map(dev
, MAP_1
);
3520 /* duplicate and then set the target end state in map[0] */
3521 memcpy(dest
, src
, sizeof_imsm_map(src
));
3522 if ((migr_type
== MIGR_REBUILD
) ||
3523 (migr_type
== MIGR_GEN_MIGR
)) {
3527 for (i
= 0; i
< src
->num_members
; i
++) {
3528 ord
= __le32_to_cpu(src
->disk_ord_tbl
[i
]);
3529 set_imsm_ord_tbl_ent(src
, i
, ord_to_idx(ord
));
3533 if (migr_type
== MIGR_GEN_MIGR
)
3534 /* Clear migration record */
3535 memset(super
->migr_rec
, 0, sizeof(struct migr_record
));
3537 src
->map_state
= to_state
;
3540 static void end_migration(struct imsm_dev
*dev
, struct intel_super
*super
,
3543 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
3544 struct imsm_map
*prev
= get_imsm_map(dev
, dev
->vol
.migr_state
== 0 ?
3548 /* merge any IMSM_ORD_REBUILD bits that were not successfully
3549 * completed in the last migration.
3551 * FIXME add support for raid-level-migration
3553 if ((map_state
!= map
->map_state
) && (is_gen_migration(dev
) == 0) &&
3554 (prev
->map_state
!= IMSM_T_STATE_UNINITIALIZED
)) {
3555 /* when final map state is other than expected
3556 * merge maps (not for migration)
3560 for (i
= 0; i
< prev
->num_members
; i
++)
3561 for (j
= 0; j
< map
->num_members
; j
++)
3562 /* during online capacity expansion
3563 * disks position can be changed
3564 * if takeover is used
3566 if (ord_to_idx(map
->disk_ord_tbl
[j
]) ==
3567 ord_to_idx(prev
->disk_ord_tbl
[i
])) {
3568 map
->disk_ord_tbl
[j
] |=
3569 prev
->disk_ord_tbl
[i
];
3572 failed
= imsm_count_failed(super
, dev
, MAP_0
);
3573 map_state
= imsm_check_degraded(super
, dev
, failed
, MAP_0
);
3576 dev
->vol
.migr_state
= 0;
3577 set_migr_type(dev
, 0);
3578 dev
->vol
.curr_migr_unit
= 0;
3579 map
->map_state
= map_state
;
3583 static int parse_raid_devices(struct intel_super
*super
)
3586 struct imsm_dev
*dev_new
;
3587 size_t len
, len_migr
;
3589 size_t space_needed
= 0;
3590 struct imsm_super
*mpb
= super
->anchor
;
3592 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
3593 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
3594 struct intel_dev
*dv
;
3596 len
= sizeof_imsm_dev(dev_iter
, 0);
3597 len_migr
= sizeof_imsm_dev(dev_iter
, 1);
3599 space_needed
+= len_migr
- len
;
3601 dv
= xmalloc(sizeof(*dv
));
3602 if (max_len
< len_migr
)
3604 if (max_len
> len_migr
)
3605 space_needed
+= max_len
- len_migr
;
3606 dev_new
= xmalloc(max_len
);
3607 imsm_copy_dev(dev_new
, dev_iter
);
3610 dv
->next
= super
->devlist
;
3611 super
->devlist
= dv
;
3614 /* ensure that super->buf is large enough when all raid devices
3617 if (__le32_to_cpu(mpb
->mpb_size
) + space_needed
> super
->len
) {
3620 len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + space_needed
, 512);
3621 if (posix_memalign(&buf
, 512, len
) != 0)
3624 memcpy(buf
, super
->buf
, super
->len
);
3625 memset(buf
+ super
->len
, 0, len
- super
->len
);
3634 /* retrieve a pointer to the bbm log which starts after all raid devices */
3635 struct bbm_log
*__get_imsm_bbm_log(struct imsm_super
*mpb
)
3639 if (__le32_to_cpu(mpb
->bbm_log_size
)) {
3641 ptr
+= mpb
->mpb_size
- __le32_to_cpu(mpb
->bbm_log_size
);
3647 /*******************************************************************************
3648 * Function: check_mpb_migr_compatibility
3649 * Description: Function checks for unsupported migration features:
3650 * - migration optimization area (pba_of_lba0)
3651 * - descending reshape (ascending_migr)
3653 * super : imsm metadata information
3655 * 0 : migration is compatible
3656 * -1 : migration is not compatible
3657 ******************************************************************************/
3658 int check_mpb_migr_compatibility(struct intel_super
*super
)
3660 struct imsm_map
*map0
, *map1
;
3661 struct migr_record
*migr_rec
= super
->migr_rec
;
3664 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
3665 struct imsm_dev
*dev_iter
= __get_imsm_dev(super
->anchor
, i
);
3668 dev_iter
->vol
.migr_state
== 1 &&
3669 dev_iter
->vol
.migr_type
== MIGR_GEN_MIGR
) {
3670 /* This device is migrating */
3671 map0
= get_imsm_map(dev_iter
, MAP_0
);
3672 map1
= get_imsm_map(dev_iter
, MAP_1
);
3673 if (pba_of_lba0(map0
) != pba_of_lba0(map1
))
3674 /* migration optimization area was used */
3676 if (migr_rec
->ascending_migr
== 0
3677 && migr_rec
->dest_depth_per_unit
> 0)
3678 /* descending reshape not supported yet */
3685 static void __free_imsm(struct intel_super
*super
, int free_disks
);
3687 /* load_imsm_mpb - read matrix metadata
3688 * allocates super->mpb to be freed by free_imsm
3690 static int load_imsm_mpb(int fd
, struct intel_super
*super
, char *devname
)
3692 unsigned long long dsize
;
3693 unsigned long long sectors
;
3695 struct imsm_super
*anchor
;
3698 get_dev_size(fd
, NULL
, &dsize
);
3701 pr_err("%s: device to small for imsm\n",
3706 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0) {
3708 pr_err("Cannot seek to anchor block on %s: %s\n",
3709 devname
, strerror(errno
));
3713 if (posix_memalign((void**)&anchor
, 512, 512) != 0) {
3715 pr_err("Failed to allocate imsm anchor buffer on %s\n", devname
);
3718 if (read(fd
, anchor
, 512) != 512) {
3720 pr_err("Cannot read anchor block on %s: %s\n",
3721 devname
, strerror(errno
));
3726 if (strncmp((char *) anchor
->sig
, MPB_SIGNATURE
, MPB_SIG_LEN
) != 0) {
3728 pr_err("no IMSM anchor on %s\n", devname
);
3733 __free_imsm(super
, 0);
3734 /* reload capability and hba */
3736 /* capability and hba must be updated with new super allocation */
3737 find_intel_hba_capability(fd
, super
, devname
);
3738 super
->len
= ROUND_UP(anchor
->mpb_size
, 512);
3739 if (posix_memalign(&super
->buf
, 512, super
->len
) != 0) {
3741 pr_err("unable to allocate %zu byte mpb buffer\n",
3746 memcpy(super
->buf
, anchor
, 512);
3748 sectors
= mpb_sectors(anchor
) - 1;
3751 if (posix_memalign(&super
->migr_rec_buf
, 512, MIGR_REC_BUF_SIZE
) != 0) {
3752 pr_err("could not allocate migr_rec buffer\n");
3756 super
->clean_migration_record_by_mdmon
= 0;
3759 check_sum
= __gen_imsm_checksum(super
->anchor
);
3760 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
3762 pr_err("IMSM checksum %x != %x on %s\n",
3764 __le32_to_cpu(super
->anchor
->check_sum
),
3772 /* read the extended mpb */
3773 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0) {
3775 pr_err("Cannot seek to extended mpb on %s: %s\n",
3776 devname
, strerror(errno
));
3780 if ((unsigned)read(fd
, super
->buf
+ 512, super
->len
- 512) != super
->len
- 512) {
3782 pr_err("Cannot read extended mpb on %s: %s\n",
3783 devname
, strerror(errno
));
3787 check_sum
= __gen_imsm_checksum(super
->anchor
);
3788 if (check_sum
!= __le32_to_cpu(super
->anchor
->check_sum
)) {
3790 pr_err("IMSM checksum %x != %x on %s\n",
3791 check_sum
, __le32_to_cpu(super
->anchor
->check_sum
),
3796 /* FIXME the BBM log is disk specific so we cannot use this global
3797 * buffer for all disks. Ok for now since we only look at the global
3798 * bbm_log_size parameter to gate assembly
3800 super
->bbm_log
= __get_imsm_bbm_log(super
->anchor
);
3805 static int read_imsm_migr_rec(int fd
, struct intel_super
*super
);
3807 /* clears hi bits in metadata if MPB_ATTRIB_2TB_DISK not set */
3808 static void clear_hi(struct intel_super
*super
)
3810 struct imsm_super
*mpb
= super
->anchor
;
3812 if (mpb
->attributes
& MPB_ATTRIB_2TB_DISK
)
3814 for (i
= 0; i
< mpb
->num_disks
; ++i
) {
3815 struct imsm_disk
*disk
= &mpb
->disk
[i
];
3816 disk
->total_blocks_hi
= 0;
3818 for (i
= 0; i
< mpb
->num_raid_devs
; ++i
) {
3819 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
3822 for (n
= 0; n
< 2; ++n
) {
3823 struct imsm_map
*map
= get_imsm_map(dev
, n
);
3826 map
->pba_of_lba0_hi
= 0;
3827 map
->blocks_per_member_hi
= 0;
3828 map
->num_data_stripes_hi
= 0;
3834 load_and_parse_mpb(int fd
, struct intel_super
*super
, char *devname
, int keep_fd
)
3838 err
= load_imsm_mpb(fd
, super
, devname
);
3841 err
= load_imsm_disk(fd
, super
, devname
, keep_fd
);
3844 err
= parse_raid_devices(super
);
3849 static void __free_imsm_disk(struct dl
*d
)
3861 static void free_imsm_disks(struct intel_super
*super
)
3865 while (super
->disks
) {
3867 super
->disks
= d
->next
;
3868 __free_imsm_disk(d
);
3870 while (super
->disk_mgmt_list
) {
3871 d
= super
->disk_mgmt_list
;
3872 super
->disk_mgmt_list
= d
->next
;
3873 __free_imsm_disk(d
);
3875 while (super
->missing
) {
3877 super
->missing
= d
->next
;
3878 __free_imsm_disk(d
);
3883 /* free all the pieces hanging off of a super pointer */
3884 static void __free_imsm(struct intel_super
*super
, int free_disks
)
3886 struct intel_hba
*elem
, *next
;
3892 /* unlink capability description */
3894 if (super
->migr_rec_buf
) {
3895 free(super
->migr_rec_buf
);
3896 super
->migr_rec_buf
= NULL
;
3899 free_imsm_disks(super
);
3900 free_devlist(super
);
3904 free((void *)elem
->path
);
3912 static void free_imsm(struct intel_super
*super
)
3914 __free_imsm(super
, 1);
3918 static void free_super_imsm(struct supertype
*st
)
3920 struct intel_super
*super
= st
->sb
;
3929 static struct intel_super
*alloc_super(void)
3931 struct intel_super
*super
= xcalloc(1, sizeof(*super
));
3933 super
->current_vol
= -1;
3934 super
->create_offset
= ~((unsigned long long) 0);
3939 * find and allocate hba and OROM/EFI based on valid fd of RAID component device
3941 static int find_intel_hba_capability(int fd
, struct intel_super
*super
, char *devname
)
3943 struct sys_dev
*hba_name
;
3946 if ((fd
< 0) || check_env("IMSM_NO_PLATFORM")) {
3951 hba_name
= find_disk_attached_hba(fd
, NULL
);
3954 pr_err("%s is not attached to Intel(R) RAID controller.\n",
3958 rv
= attach_hba_to_super(super
, hba_name
);
3961 struct intel_hba
*hba
= super
->hba
;
3963 pr_err("%s is attached to Intel(R) %s %s (%s),\n"
3964 " but the container is assigned to Intel(R) %s %s (",
3966 get_sys_dev_type(hba_name
->type
),
3967 hba_name
->type
== SYS_DEV_VMD
? "domain" : "RAID controller",
3968 hba_name
->pci_id
? : "Err!",
3969 get_sys_dev_type(super
->hba
->type
),
3970 hba
->type
== SYS_DEV_VMD
? "domain" : "RAID controller");
3973 fprintf(stderr
, "%s", hba
->pci_id
? : "Err!");
3975 fprintf(stderr
, ", ");
3978 fprintf(stderr
, ").\n"
3979 " Mixing devices attached to different %s is not allowed.\n",
3980 hba_name
->type
== SYS_DEV_VMD
? "VMD domains" : "controllers");
3984 super
->orom
= find_imsm_capability(hba_name
);
3991 /* find_missing - helper routine for load_super_imsm_all that identifies
3992 * disks that have disappeared from the system. This routine relies on
3993 * the mpb being uptodate, which it is at load time.
3995 static int find_missing(struct intel_super
*super
)
3998 struct imsm_super
*mpb
= super
->anchor
;
4000 struct imsm_disk
*disk
;
4002 for (i
= 0; i
< mpb
->num_disks
; i
++) {
4003 disk
= __get_imsm_disk(mpb
, i
);
4004 dl
= serial_to_dl(disk
->serial
, super
);
4008 dl
= xmalloc(sizeof(*dl
));
4012 dl
->devname
= xstrdup("missing");
4014 serialcpy(dl
->serial
, disk
->serial
);
4017 dl
->next
= super
->missing
;
4018 super
->missing
= dl
;
4025 static struct intel_disk
*disk_list_get(__u8
*serial
, struct intel_disk
*disk_list
)
4027 struct intel_disk
*idisk
= disk_list
;
4030 if (serialcmp(idisk
->disk
.serial
, serial
) == 0)
4032 idisk
= idisk
->next
;
4038 static int __prep_thunderdome(struct intel_super
**table
, int tbl_size
,
4039 struct intel_super
*super
,
4040 struct intel_disk
**disk_list
)
4042 struct imsm_disk
*d
= &super
->disks
->disk
;
4043 struct imsm_super
*mpb
= super
->anchor
;
4046 for (i
= 0; i
< tbl_size
; i
++) {
4047 struct imsm_super
*tbl_mpb
= table
[i
]->anchor
;
4048 struct imsm_disk
*tbl_d
= &table
[i
]->disks
->disk
;
4050 if (tbl_mpb
->family_num
== mpb
->family_num
) {
4051 if (tbl_mpb
->check_sum
== mpb
->check_sum
) {
4052 dprintf("mpb from %d:%d matches %d:%d\n",
4053 super
->disks
->major
,
4054 super
->disks
->minor
,
4055 table
[i
]->disks
->major
,
4056 table
[i
]->disks
->minor
);
4060 if (((is_configured(d
) && !is_configured(tbl_d
)) ||
4061 is_configured(d
) == is_configured(tbl_d
)) &&
4062 tbl_mpb
->generation_num
< mpb
->generation_num
) {
4063 /* current version of the mpb is a
4064 * better candidate than the one in
4065 * super_table, but copy over "cross
4066 * generational" status
4068 struct intel_disk
*idisk
;
4070 dprintf("mpb from %d:%d replaces %d:%d\n",
4071 super
->disks
->major
,
4072 super
->disks
->minor
,
4073 table
[i
]->disks
->major
,
4074 table
[i
]->disks
->minor
);
4076 idisk
= disk_list_get(tbl_d
->serial
, *disk_list
);
4077 if (idisk
&& is_failed(&idisk
->disk
))
4078 tbl_d
->status
|= FAILED_DISK
;
4081 struct intel_disk
*idisk
;
4082 struct imsm_disk
*disk
;
4084 /* tbl_mpb is more up to date, but copy
4085 * over cross generational status before
4088 disk
= __serial_to_disk(d
->serial
, mpb
, NULL
);
4089 if (disk
&& is_failed(disk
))
4090 d
->status
|= FAILED_DISK
;
4092 idisk
= disk_list_get(d
->serial
, *disk_list
);
4095 if (disk
&& is_configured(disk
))
4096 idisk
->disk
.status
|= CONFIGURED_DISK
;
4099 dprintf("mpb from %d:%d prefer %d:%d\n",
4100 super
->disks
->major
,
4101 super
->disks
->minor
,
4102 table
[i
]->disks
->major
,
4103 table
[i
]->disks
->minor
);
4111 table
[tbl_size
++] = super
;
4115 /* update/extend the merged list of imsm_disk records */
4116 for (j
= 0; j
< mpb
->num_disks
; j
++) {
4117 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, j
);
4118 struct intel_disk
*idisk
;
4120 idisk
= disk_list_get(disk
->serial
, *disk_list
);
4122 idisk
->disk
.status
|= disk
->status
;
4123 if (is_configured(&idisk
->disk
) ||
4124 is_failed(&idisk
->disk
))
4125 idisk
->disk
.status
&= ~(SPARE_DISK
);
4127 idisk
= xcalloc(1, sizeof(*idisk
));
4128 idisk
->owner
= IMSM_UNKNOWN_OWNER
;
4129 idisk
->disk
= *disk
;
4130 idisk
->next
= *disk_list
;
4134 if (serialcmp(idisk
->disk
.serial
, d
->serial
) == 0)
4141 static struct intel_super
*
4142 validate_members(struct intel_super
*super
, struct intel_disk
*disk_list
,
4145 struct imsm_super
*mpb
= super
->anchor
;
4149 for (i
= 0; i
< mpb
->num_disks
; i
++) {
4150 struct imsm_disk
*disk
= __get_imsm_disk(mpb
, i
);
4151 struct intel_disk
*idisk
;
4153 idisk
= disk_list_get(disk
->serial
, disk_list
);
4155 if (idisk
->owner
== owner
||
4156 idisk
->owner
== IMSM_UNKNOWN_OWNER
)
4159 dprintf("'%.16s' owner %d != %d\n",
4160 disk
->serial
, idisk
->owner
,
4163 dprintf("unknown disk %x [%d]: %.16s\n",
4164 __le32_to_cpu(mpb
->family_num
), i
,
4170 if (ok_count
== mpb
->num_disks
)
4175 static void show_conflicts(__u32 family_num
, struct intel_super
*super_list
)
4177 struct intel_super
*s
;
4179 for (s
= super_list
; s
; s
= s
->next
) {
4180 if (family_num
!= s
->anchor
->family_num
)
4182 pr_err("Conflict, offlining family %#x on '%s'\n",
4183 __le32_to_cpu(family_num
), s
->disks
->devname
);
4187 static struct intel_super
*
4188 imsm_thunderdome(struct intel_super
**super_list
, int len
)
4190 struct intel_super
*super_table
[len
];
4191 struct intel_disk
*disk_list
= NULL
;
4192 struct intel_super
*champion
, *spare
;
4193 struct intel_super
*s
, **del
;
4198 memset(super_table
, 0, sizeof(super_table
));
4199 for (s
= *super_list
; s
; s
= s
->next
)
4200 tbl_size
= __prep_thunderdome(super_table
, tbl_size
, s
, &disk_list
);
4202 for (i
= 0; i
< tbl_size
; i
++) {
4203 struct imsm_disk
*d
;
4204 struct intel_disk
*idisk
;
4205 struct imsm_super
*mpb
= super_table
[i
]->anchor
;
4208 d
= &s
->disks
->disk
;
4210 /* 'd' must appear in merged disk list for its
4211 * configuration to be valid
4213 idisk
= disk_list_get(d
->serial
, disk_list
);
4214 if (idisk
&& idisk
->owner
== i
)
4215 s
= validate_members(s
, disk_list
, i
);
4220 dprintf("marking family: %#x from %d:%d offline\n",
4222 super_table
[i
]->disks
->major
,
4223 super_table
[i
]->disks
->minor
);
4227 /* This is where the mdadm implementation differs from the Windows
4228 * driver which has no strict concept of a container. We can only
4229 * assemble one family from a container, so when returning a prodigal
4230 * array member to this system the code will not be able to disambiguate
4231 * the container contents that should be assembled ("foreign" versus
4232 * "local"). It requires user intervention to set the orig_family_num
4233 * to a new value to establish a new container. The Windows driver in
4234 * this situation fixes up the volume name in place and manages the
4235 * foreign array as an independent entity.
4240 for (i
= 0; i
< tbl_size
; i
++) {
4241 struct intel_super
*tbl_ent
= super_table
[i
];
4247 if (tbl_ent
->anchor
->num_raid_devs
== 0) {
4252 if (s
&& !is_spare
) {
4253 show_conflicts(tbl_ent
->anchor
->family_num
, *super_list
);
4255 } else if (!s
&& !is_spare
)
4268 pr_err("Chose family %#x on '%s', assemble conflicts to new container with '--update=uuid'\n",
4269 __le32_to_cpu(s
->anchor
->family_num
), s
->disks
->devname
);
4271 /* collect all dl's onto 'champion', and update them to
4272 * champion's version of the status
4274 for (s
= *super_list
; s
; s
= s
->next
) {
4275 struct imsm_super
*mpb
= champion
->anchor
;
4276 struct dl
*dl
= s
->disks
;
4281 mpb
->attributes
|= s
->anchor
->attributes
& MPB_ATTRIB_2TB_DISK
;
4283 for (i
= 0; i
< mpb
->num_disks
; i
++) {
4284 struct imsm_disk
*disk
;
4286 disk
= __serial_to_disk(dl
->serial
, mpb
, &dl
->index
);
4289 /* only set index on disks that are a member of
4290 * a populated contianer, i.e. one with
4293 if (is_failed(&dl
->disk
))
4295 else if (is_spare(&dl
->disk
))
4301 if (i
>= mpb
->num_disks
) {
4302 struct intel_disk
*idisk
;
4304 idisk
= disk_list_get(dl
->serial
, disk_list
);
4305 if (idisk
&& is_spare(&idisk
->disk
) &&
4306 !is_failed(&idisk
->disk
) && !is_configured(&idisk
->disk
))
4314 dl
->next
= champion
->disks
;
4315 champion
->disks
= dl
;
4319 /* delete 'champion' from super_list */
4320 for (del
= super_list
; *del
; ) {
4321 if (*del
== champion
) {
4322 *del
= (*del
)->next
;
4325 del
= &(*del
)->next
;
4327 champion
->next
= NULL
;
4331 struct intel_disk
*idisk
= disk_list
;
4333 disk_list
= disk_list
->next
;
4341 get_sra_super_block(int fd
, struct intel_super
**super_list
, char *devname
, int *max
, int keep_fd
);
4342 static int get_super_block(struct intel_super
**super_list
, char *devnm
, char *devname
,
4343 int major
, int minor
, int keep_fd
);
4345 get_devlist_super_block(struct md_list
*devlist
, struct intel_super
**super_list
,
4346 int *max
, int keep_fd
);
4348 static int load_super_imsm_all(struct supertype
*st
, int fd
, void **sbp
,
4349 char *devname
, struct md_list
*devlist
,
4352 struct intel_super
*super_list
= NULL
;
4353 struct intel_super
*super
= NULL
;
4358 /* 'fd' is an opened container */
4359 err
= get_sra_super_block(fd
, &super_list
, devname
, &i
, keep_fd
);
4361 /* get super block from devlist devices */
4362 err
= get_devlist_super_block(devlist
, &super_list
, &i
, keep_fd
);
4365 /* all mpbs enter, maybe one leaves */
4366 super
= imsm_thunderdome(&super_list
, i
);
4372 if (find_missing(super
) != 0) {
4378 /* load migration record */
4379 err
= load_imsm_migr_rec(super
, NULL
);
4381 /* migration is in progress,
4382 * but migr_rec cannot be loaded,
4388 /* Check migration compatibility */
4389 if ((err
== 0) && (check_mpb_migr_compatibility(super
) != 0)) {
4390 pr_err("Unsupported migration detected");
4392 fprintf(stderr
, " on %s\n", devname
);
4394 fprintf(stderr
, " (IMSM).\n");
4403 while (super_list
) {
4404 struct intel_super
*s
= super_list
;
4406 super_list
= super_list
->next
;
4415 strcpy(st
->container_devnm
, fd2devnm(fd
));
4417 st
->container_devnm
[0] = 0;
4418 if (err
== 0 && st
->ss
== NULL
) {
4419 st
->ss
= &super_imsm
;
4420 st
->minor_version
= 0;
4421 st
->max_devs
= IMSM_MAX_DEVICES
;
4427 get_devlist_super_block(struct md_list
*devlist
, struct intel_super
**super_list
,
4428 int *max
, int keep_fd
)
4430 struct md_list
*tmpdev
;
4434 for (i
= 0, tmpdev
= devlist
; tmpdev
; tmpdev
= tmpdev
->next
) {
4435 if (tmpdev
->used
!= 1)
4437 if (tmpdev
->container
== 1) {
4439 int fd
= dev_open(tmpdev
->devname
, O_RDONLY
|O_EXCL
);
4441 pr_err("cannot open device %s: %s\n",
4442 tmpdev
->devname
, strerror(errno
));
4446 err
= get_sra_super_block(fd
, super_list
,
4447 tmpdev
->devname
, &lmax
,
4456 int major
= major(tmpdev
->st_rdev
);
4457 int minor
= minor(tmpdev
->st_rdev
);
4458 err
= get_super_block(super_list
,
4475 static int get_super_block(struct intel_super
**super_list
, char *devnm
, char *devname
,
4476 int major
, int minor
, int keep_fd
)
4478 struct intel_super
*s
;
4490 sprintf(nm
, "%d:%d", major
, minor
);
4491 dfd
= dev_open(nm
, O_RDWR
);
4497 find_intel_hba_capability(dfd
, s
, devname
);
4498 err
= load_and_parse_mpb(dfd
, s
, NULL
, keep_fd
);
4500 /* retry the load if we might have raced against mdmon */
4501 if (err
== 3 && devnm
&& mdmon_running(devnm
))
4502 for (retry
= 0; retry
< 3; retry
++) {
4504 err
= load_and_parse_mpb(dfd
, s
, NULL
, keep_fd
);
4510 s
->next
= *super_list
;
4518 if ((dfd
>= 0) && (!keep_fd
))
4525 get_sra_super_block(int fd
, struct intel_super
**super_list
, char *devname
, int *max
, int keep_fd
)
4532 sra
= sysfs_read(fd
, NULL
, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
4536 if (sra
->array
.major_version
!= -1 ||
4537 sra
->array
.minor_version
!= -2 ||
4538 strcmp(sra
->text_version
, "imsm") != 0) {
4543 devnm
= fd2devnm(fd
);
4544 for (sd
= sra
->devs
, i
= 0; sd
; sd
= sd
->next
, i
++) {
4545 if (get_super_block(super_list
, devnm
, devname
,
4546 sd
->disk
.major
, sd
->disk
.minor
, keep_fd
) != 0) {
4557 static int load_container_imsm(struct supertype
*st
, int fd
, char *devname
)
4559 return load_super_imsm_all(st
, fd
, &st
->sb
, devname
, NULL
, 1);
4563 static int load_super_imsm(struct supertype
*st
, int fd
, char *devname
)
4565 struct intel_super
*super
;
4569 if (test_partition(fd
))
4570 /* IMSM not allowed on partitions */
4573 free_super_imsm(st
);
4575 super
= alloc_super();
4576 /* Load hba and capabilities if they exist.
4577 * But do not preclude loading metadata in case capabilities or hba are
4578 * non-compliant and ignore_hw_compat is set.
4580 rv
= find_intel_hba_capability(fd
, super
, devname
);
4581 /* no orom/efi or non-intel hba of the disk */
4582 if ((rv
!= 0) && (st
->ignore_hw_compat
== 0)) {
4584 pr_err("No OROM/EFI properties for %s\n", devname
);
4588 rv
= load_and_parse_mpb(fd
, super
, devname
, 0);
4590 /* retry the load if we might have raced against mdmon */
4592 struct mdstat_ent
*mdstat
= NULL
;
4593 char *name
= fd2kname(fd
);
4596 mdstat
= mdstat_by_component(name
);
4598 if (mdstat
&& mdmon_running(mdstat
->devnm
) && getpid() != mdmon_pid(mdstat
->devnm
)) {
4599 for (retry
= 0; retry
< 3; retry
++) {
4601 rv
= load_and_parse_mpb(fd
, super
, devname
, 0);
4607 free_mdstat(mdstat
);
4612 pr_err("Failed to load all information sections on %s\n", devname
);
4618 if (st
->ss
== NULL
) {
4619 st
->ss
= &super_imsm
;
4620 st
->minor_version
= 0;
4621 st
->max_devs
= IMSM_MAX_DEVICES
;
4624 /* load migration record */
4625 if (load_imsm_migr_rec(super
, NULL
) == 0) {
4626 /* Check for unsupported migration features */
4627 if (check_mpb_migr_compatibility(super
) != 0) {
4628 pr_err("Unsupported migration detected");
4630 fprintf(stderr
, " on %s\n", devname
);
4632 fprintf(stderr
, " (IMSM).\n");
4640 static __u16
info_to_blocks_per_strip(mdu_array_info_t
*info
)
4642 if (info
->level
== 1)
4644 return info
->chunk_size
>> 9;
4647 static unsigned long long info_to_blocks_per_member(mdu_array_info_t
*info
,
4648 unsigned long long size
)
4650 if (info
->level
== 1)
4653 return (size
* 2) & ~(info_to_blocks_per_strip(info
) - 1);
4656 static void imsm_update_version_info(struct intel_super
*super
)
4658 /* update the version and attributes */
4659 struct imsm_super
*mpb
= super
->anchor
;
4661 struct imsm_dev
*dev
;
4662 struct imsm_map
*map
;
4665 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4666 dev
= get_imsm_dev(super
, i
);
4667 map
= get_imsm_map(dev
, MAP_0
);
4668 if (__le32_to_cpu(dev
->size_high
) > 0)
4669 mpb
->attributes
|= MPB_ATTRIB_2TB
;
4671 /* FIXME detect when an array spans a port multiplier */
4673 mpb
->attributes
|= MPB_ATTRIB_PM
;
4676 if (mpb
->num_raid_devs
> 1 ||
4677 mpb
->attributes
!= MPB_ATTRIB_CHECKSUM_VERIFY
) {
4678 version
= MPB_VERSION_ATTRIBS
;
4679 switch (get_imsm_raid_level(map
)) {
4680 case 0: mpb
->attributes
|= MPB_ATTRIB_RAID0
; break;
4681 case 1: mpb
->attributes
|= MPB_ATTRIB_RAID1
; break;
4682 case 10: mpb
->attributes
|= MPB_ATTRIB_RAID10
; break;
4683 case 5: mpb
->attributes
|= MPB_ATTRIB_RAID5
; break;
4686 if (map
->num_members
>= 5)
4687 version
= MPB_VERSION_5OR6_DISK_ARRAY
;
4688 else if (dev
->status
== DEV_CLONE_N_GO
)
4689 version
= MPB_VERSION_CNG
;
4690 else if (get_imsm_raid_level(map
) == 5)
4691 version
= MPB_VERSION_RAID5
;
4692 else if (map
->num_members
>= 3)
4693 version
= MPB_VERSION_3OR4_DISK_ARRAY
;
4694 else if (get_imsm_raid_level(map
) == 1)
4695 version
= MPB_VERSION_RAID1
;
4697 version
= MPB_VERSION_RAID0
;
4699 strcpy(((char *) mpb
->sig
) + strlen(MPB_SIGNATURE
), version
);
4703 static int check_name(struct intel_super
*super
, char *name
, int quiet
)
4705 struct imsm_super
*mpb
= super
->anchor
;
4706 char *reason
= NULL
;
4709 if (strlen(name
) > MAX_RAID_SERIAL_LEN
)
4710 reason
= "must be 16 characters or less";
4712 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
4713 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
4715 if (strncmp((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
) == 0) {
4716 reason
= "already exists";
4721 if (reason
&& !quiet
)
4722 pr_err("imsm volume name %s\n", reason
);
4727 static int init_super_imsm_volume(struct supertype
*st
, mdu_array_info_t
*info
,
4728 unsigned long long size
, char *name
,
4729 char *homehost
, int *uuid
,
4730 long long data_offset
)
4732 /* We are creating a volume inside a pre-existing container.
4733 * so st->sb is already set.
4735 struct intel_super
*super
= st
->sb
;
4736 struct imsm_super
*mpb
= super
->anchor
;
4737 struct intel_dev
*dv
;
4738 struct imsm_dev
*dev
;
4739 struct imsm_vol
*vol
;
4740 struct imsm_map
*map
;
4741 int idx
= mpb
->num_raid_devs
;
4743 unsigned long long array_blocks
;
4744 size_t size_old
, size_new
;
4745 unsigned long long num_data_stripes
;
4747 if (super
->orom
&& mpb
->num_raid_devs
>= super
->orom
->vpa
) {
4748 pr_err("This imsm-container already has the maximum of %d volumes\n", super
->orom
->vpa
);
4752 /* ensure the mpb is large enough for the new data */
4753 size_old
= __le32_to_cpu(mpb
->mpb_size
);
4754 size_new
= disks_to_mpb_size(info
->nr_disks
);
4755 if (size_new
> size_old
) {
4757 size_t size_round
= ROUND_UP(size_new
, 512);
4759 if (posix_memalign(&mpb_new
, 512, size_round
) != 0) {
4760 pr_err("could not allocate new mpb\n");
4763 if (posix_memalign(&super
->migr_rec_buf
, 512,
4764 MIGR_REC_BUF_SIZE
) != 0) {
4765 pr_err("could not allocate migr_rec buffer\n");
4771 memcpy(mpb_new
, mpb
, size_old
);
4774 super
->anchor
= mpb_new
;
4775 mpb
->mpb_size
= __cpu_to_le32(size_new
);
4776 memset(mpb_new
+ size_old
, 0, size_round
- size_old
);
4778 super
->current_vol
= idx
;
4780 /* handle 'failed_disks' by either:
4781 * a) create dummy disk entries in the table if this the first
4782 * volume in the array. We add them here as this is the only
4783 * opportunity to add them. add_to_super_imsm_volume()
4784 * handles the non-failed disks and continues incrementing
4786 * b) validate that 'failed_disks' matches the current number
4787 * of missing disks if the container is populated
4789 if (super
->current_vol
== 0) {
4791 for (i
= 0; i
< info
->failed_disks
; i
++) {
4792 struct imsm_disk
*disk
;
4795 disk
= __get_imsm_disk(mpb
, i
);
4796 disk
->status
= CONFIGURED_DISK
| FAILED_DISK
;
4797 disk
->scsi_id
= __cpu_to_le32(~(__u32
)0);
4798 snprintf((char *) disk
->serial
, MAX_RAID_SERIAL_LEN
,
4801 find_missing(super
);
4806 for (d
= super
->missing
; d
; d
= d
->next
)
4808 if (info
->failed_disks
> missing
) {
4809 pr_err("unable to add 'missing' disk to container\n");
4814 if (!check_name(super
, name
, 0))
4816 dv
= xmalloc(sizeof(*dv
));
4817 dev
= xcalloc(1, sizeof(*dev
) + sizeof(__u32
) * (info
->raid_disks
- 1));
4818 strncpy((char *) dev
->volume
, name
, MAX_RAID_SERIAL_LEN
);
4819 array_blocks
= calc_array_size(info
->level
, info
->raid_disks
,
4820 info
->layout
, info
->chunk_size
,
4822 /* round array size down to closest MB */
4823 array_blocks
= (array_blocks
>> SECT_PER_MB_SHIFT
) << SECT_PER_MB_SHIFT
;
4825 dev
->size_low
= __cpu_to_le32((__u32
) array_blocks
);
4826 dev
->size_high
= __cpu_to_le32((__u32
) (array_blocks
>> 32));
4827 dev
->status
= (DEV_READ_COALESCING
| DEV_WRITE_COALESCING
);
4829 vol
->migr_state
= 0;
4830 set_migr_type(dev
, MIGR_INIT
);
4831 vol
->dirty
= !info
->state
;
4832 vol
->curr_migr_unit
= 0;
4833 map
= get_imsm_map(dev
, MAP_0
);
4834 set_pba_of_lba0(map
, super
->create_offset
);
4835 set_blocks_per_member(map
, info_to_blocks_per_member(info
, size
));
4836 map
->blocks_per_strip
= __cpu_to_le16(info_to_blocks_per_strip(info
));
4837 map
->failed_disk_num
= ~0;
4838 if (info
->level
> 0)
4839 map
->map_state
= (info
->state
? IMSM_T_STATE_NORMAL
4840 : IMSM_T_STATE_UNINITIALIZED
);
4842 map
->map_state
= info
->failed_disks
? IMSM_T_STATE_FAILED
:
4843 IMSM_T_STATE_NORMAL
;
4846 if (info
->level
== 1 && info
->raid_disks
> 2) {
4849 pr_err("imsm does not support more than 2 disksin a raid1 volume\n");
4853 map
->raid_level
= info
->level
;
4854 if (info
->level
== 10) {
4855 map
->raid_level
= 1;
4856 map
->num_domains
= info
->raid_disks
/ 2;
4857 } else if (info
->level
== 1)
4858 map
->num_domains
= info
->raid_disks
;
4860 map
->num_domains
= 1;
4862 /* info->size is only int so use the 'size' parameter instead */
4863 num_data_stripes
= (size
* 2) / info_to_blocks_per_strip(info
);
4864 num_data_stripes
/= map
->num_domains
;
4865 set_num_data_stripes(map
, num_data_stripes
);
4867 map
->num_members
= info
->raid_disks
;
4868 for (i
= 0; i
< map
->num_members
; i
++) {
4869 /* initialized in add_to_super */
4870 set_imsm_ord_tbl_ent(map
, i
, IMSM_ORD_REBUILD
);
4872 mpb
->num_raid_devs
++;
4875 dv
->index
= super
->current_vol
;
4876 dv
->next
= super
->devlist
;
4877 super
->devlist
= dv
;
4879 imsm_update_version_info(super
);
4884 static int init_super_imsm(struct supertype
*st
, mdu_array_info_t
*info
,
4885 unsigned long long size
, char *name
,
4886 char *homehost
, int *uuid
,
4887 unsigned long long data_offset
)
4889 /* This is primarily called by Create when creating a new array.
4890 * We will then get add_to_super called for each component, and then
4891 * write_init_super called to write it out to each device.
4892 * For IMSM, Create can create on fresh devices or on a pre-existing
4894 * To create on a pre-existing array a different method will be called.
4895 * This one is just for fresh drives.
4897 struct intel_super
*super
;
4898 struct imsm_super
*mpb
;
4902 if (data_offset
!= INVALID_SECTORS
) {
4903 pr_err("data-offset not supported by imsm\n");
4908 return init_super_imsm_volume(st
, info
, size
, name
, homehost
, uuid
,
4912 mpb_size
= disks_to_mpb_size(info
->nr_disks
);
4916 super
= alloc_super();
4917 if (super
&& posix_memalign(&super
->buf
, 512, mpb_size
) != 0) {
4922 pr_err("could not allocate superblock\n");
4925 if (posix_memalign(&super
->migr_rec_buf
, 512, MIGR_REC_BUF_SIZE
) != 0) {
4926 pr_err("could not allocate migr_rec buffer\n");
4931 memset(super
->buf
, 0, mpb_size
);
4933 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
4937 /* zeroing superblock */
4941 mpb
->attributes
= MPB_ATTRIB_CHECKSUM_VERIFY
;
4943 version
= (char *) mpb
->sig
;
4944 strcpy(version
, MPB_SIGNATURE
);
4945 version
+= strlen(MPB_SIGNATURE
);
4946 strcpy(version
, MPB_VERSION_RAID0
);
4952 static int add_to_super_imsm_volume(struct supertype
*st
, mdu_disk_info_t
*dk
,
4953 int fd
, char *devname
)
4955 struct intel_super
*super
= st
->sb
;
4956 struct imsm_super
*mpb
= super
->anchor
;
4957 struct imsm_disk
*_disk
;
4958 struct imsm_dev
*dev
;
4959 struct imsm_map
*map
;
4963 dev
= get_imsm_dev(super
, super
->current_vol
);
4964 map
= get_imsm_map(dev
, MAP_0
);
4966 if (! (dk
->state
& (1<<MD_DISK_SYNC
))) {
4967 pr_err("%s: Cannot add spare devices to IMSM volume\n",
4973 /* we're doing autolayout so grab the pre-marked (in
4974 * validate_geometry) raid_disk
4976 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
4977 if (dl
->raiddisk
== dk
->raid_disk
)
4980 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
4981 if (dl
->major
== dk
->major
&&
4982 dl
->minor
== dk
->minor
)
4987 pr_err("%s is not a member of the same container\n", devname
);
4991 /* add a pristine spare to the metadata */
4992 if (dl
->index
< 0) {
4993 dl
->index
= super
->anchor
->num_disks
;
4994 super
->anchor
->num_disks
++;
4996 /* Check the device has not already been added */
4997 slot
= get_imsm_disk_slot(map
, dl
->index
);
4999 (get_imsm_ord_tbl_ent(dev
, slot
, MAP_X
) & IMSM_ORD_REBUILD
) == 0) {
5000 pr_err("%s has been included in this array twice\n",
5004 set_imsm_ord_tbl_ent(map
, dk
->raid_disk
, dl
->index
);
5005 dl
->disk
.status
= CONFIGURED_DISK
;
5007 /* update size of 'missing' disks to be at least as large as the
5008 * largest acitve member (we only have dummy missing disks when
5009 * creating the first volume)
5011 if (super
->current_vol
== 0) {
5012 for (df
= super
->missing
; df
; df
= df
->next
) {
5013 if (total_blocks(&dl
->disk
) > total_blocks(&df
->disk
))
5014 set_total_blocks(&df
->disk
, total_blocks(&dl
->disk
));
5015 _disk
= __get_imsm_disk(mpb
, df
->index
);
5020 /* refresh unset/failed slots to point to valid 'missing' entries */
5021 for (df
= super
->missing
; df
; df
= df
->next
)
5022 for (slot
= 0; slot
< mpb
->num_disks
; slot
++) {
5023 __u32 ord
= get_imsm_ord_tbl_ent(dev
, slot
, MAP_X
);
5025 if ((ord
& IMSM_ORD_REBUILD
) == 0)
5027 set_imsm_ord_tbl_ent(map
, slot
, df
->index
| IMSM_ORD_REBUILD
);
5028 if (is_gen_migration(dev
)) {
5029 struct imsm_map
*map2
= get_imsm_map(dev
,
5031 int slot2
= get_imsm_disk_slot(map2
, df
->index
);
5032 if ((slot2
< map2
->num_members
) &&
5034 __u32 ord2
= get_imsm_ord_tbl_ent(dev
,
5037 if ((unsigned)df
->index
==
5039 set_imsm_ord_tbl_ent(map2
,
5045 dprintf("set slot:%d to missing disk:%d\n", slot
, df
->index
);
5049 /* if we are creating the first raid device update the family number */
5050 if (super
->current_vol
== 0) {
5052 struct imsm_dev
*_dev
= __get_imsm_dev(mpb
, 0);
5054 _disk
= __get_imsm_disk(mpb
, dl
->index
);
5055 if (!_dev
|| !_disk
) {
5056 pr_err("BUG mpb setup error\n");
5062 sum
+= __gen_imsm_checksum(mpb
);
5063 mpb
->family_num
= __cpu_to_le32(sum
);
5064 mpb
->orig_family_num
= mpb
->family_num
;
5066 super
->current_disk
= dl
;
5071 * Function marks disk as spare and restores disk serial
5072 * in case it was previously marked as failed by takeover operation
5074 * -1 : critical error
5075 * 0 : disk is marked as spare but serial is not set
5078 int mark_spare(struct dl
*disk
)
5080 __u8 serial
[MAX_RAID_SERIAL_LEN
];
5087 if (!imsm_read_serial(disk
->fd
, NULL
, serial
)) {
5088 /* Restore disk serial number, because takeover marks disk
5089 * as failed and adds to serial ':0' before it becomes
5092 serialcpy(disk
->serial
, serial
);
5093 serialcpy(disk
->disk
.serial
, serial
);
5096 disk
->disk
.status
= SPARE_DISK
;
5102 static int add_to_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
,
5103 int fd
, char *devname
,
5104 unsigned long long data_offset
)
5106 struct intel_super
*super
= st
->sb
;
5108 unsigned long long size
;
5113 /* If we are on an RAID enabled platform check that the disk is
5114 * attached to the raid controller.
5115 * We do not need to test disks attachment for container based additions,
5116 * they shall be already tested when container was created/assembled.
5118 rv
= find_intel_hba_capability(fd
, super
, devname
);
5119 /* no orom/efi or non-intel hba of the disk */
5121 dprintf("capability: %p fd: %d ret: %d\n",
5122 super
->orom
, fd
, rv
);
5126 if (super
->current_vol
>= 0)
5127 return add_to_super_imsm_volume(st
, dk
, fd
, devname
);
5130 dd
= xcalloc(sizeof(*dd
), 1);
5131 dd
->major
= major(stb
.st_rdev
);
5132 dd
->minor
= minor(stb
.st_rdev
);
5133 dd
->devname
= devname
? xstrdup(devname
) : NULL
;
5136 dd
->action
= DISK_ADD
;
5137 rv
= imsm_read_serial(fd
, devname
, dd
->serial
);
5139 pr_err("failed to retrieve scsi serial, aborting\n");
5144 get_dev_size(fd
, NULL
, &size
);
5145 /* clear migr_rec when adding disk to container */
5146 memset(super
->migr_rec_buf
, 0, MIGR_REC_BUF_SIZE
);
5147 if (lseek64(fd
, size
- MIGR_REC_POSITION
, SEEK_SET
) >= 0) {
5148 if (write(fd
, super
->migr_rec_buf
,
5149 MIGR_REC_BUF_SIZE
) != MIGR_REC_BUF_SIZE
)
5150 perror("Write migr_rec failed");
5154 serialcpy(dd
->disk
.serial
, dd
->serial
);
5155 set_total_blocks(&dd
->disk
, size
);
5156 if (__le32_to_cpu(dd
->disk
.total_blocks_hi
) > 0) {
5157 struct imsm_super
*mpb
= super
->anchor
;
5158 mpb
->attributes
|= MPB_ATTRIB_2TB_DISK
;
5161 if (sysfs_disk_to_scsi_id(fd
, &id
) == 0)
5162 dd
->disk
.scsi_id
= __cpu_to_le32(id
);
5164 dd
->disk
.scsi_id
= __cpu_to_le32(0);
5166 if (st
->update_tail
) {
5167 dd
->next
= super
->disk_mgmt_list
;
5168 super
->disk_mgmt_list
= dd
;
5170 dd
->next
= super
->disks
;
5172 super
->updates_pending
++;
5178 static int remove_from_super_imsm(struct supertype
*st
, mdu_disk_info_t
*dk
)
5180 struct intel_super
*super
= st
->sb
;
5183 /* remove from super works only in mdmon - for communication
5184 * manager - monitor. Check if communication memory buffer
5187 if (!st
->update_tail
) {
5188 pr_err("shall be used in mdmon context only\n");
5191 dd
= xcalloc(1, sizeof(*dd
));
5192 dd
->major
= dk
->major
;
5193 dd
->minor
= dk
->minor
;
5196 dd
->action
= DISK_REMOVE
;
5198 dd
->next
= super
->disk_mgmt_list
;
5199 super
->disk_mgmt_list
= dd
;
5204 static int store_imsm_mpb(int fd
, struct imsm_super
*mpb
);
5208 struct imsm_super anchor
;
5209 } spare_record
__attribute__ ((aligned(512)));
5211 /* spare records have their own family number and do not have any defined raid
5214 static int write_super_imsm_spares(struct intel_super
*super
, int doclose
)
5216 struct imsm_super
*mpb
= super
->anchor
;
5217 struct imsm_super
*spare
= &spare_record
.anchor
;
5221 spare
->mpb_size
= __cpu_to_le32(sizeof(struct imsm_super
));
5222 spare
->generation_num
= __cpu_to_le32(1UL);
5223 spare
->attributes
= MPB_ATTRIB_CHECKSUM_VERIFY
;
5224 spare
->num_disks
= 1;
5225 spare
->num_raid_devs
= 0;
5226 spare
->cache_size
= mpb
->cache_size
;
5227 spare
->pwr_cycle_count
= __cpu_to_le32(1);
5229 snprintf((char *) spare
->sig
, MAX_SIGNATURE_LENGTH
,
5230 MPB_SIGNATURE MPB_VERSION_RAID0
);
5232 for (d
= super
->disks
; d
; d
= d
->next
) {
5236 spare
->disk
[0] = d
->disk
;
5237 if (__le32_to_cpu(d
->disk
.total_blocks_hi
) > 0)
5238 spare
->attributes
|= MPB_ATTRIB_2TB_DISK
;
5240 sum
= __gen_imsm_checksum(spare
);
5241 spare
->family_num
= __cpu_to_le32(sum
);
5242 spare
->orig_family_num
= 0;
5243 sum
= __gen_imsm_checksum(spare
);
5244 spare
->check_sum
= __cpu_to_le32(sum
);
5246 if (store_imsm_mpb(d
->fd
, spare
)) {
5247 pr_err("failed for device %d:%d %s\n",
5248 d
->major
, d
->minor
, strerror(errno
));
5260 static int write_super_imsm(struct supertype
*st
, int doclose
)
5262 struct intel_super
*super
= st
->sb
;
5263 struct imsm_super
*mpb
= super
->anchor
;
5269 __u32 mpb_size
= sizeof(struct imsm_super
) - sizeof(struct imsm_disk
);
5271 int clear_migration_record
= 1;
5273 /* 'generation' is incremented everytime the metadata is written */
5274 generation
= __le32_to_cpu(mpb
->generation_num
);
5276 mpb
->generation_num
= __cpu_to_le32(generation
);
5278 /* fix up cases where previous mdadm releases failed to set
5281 if (mpb
->orig_family_num
== 0)
5282 mpb
->orig_family_num
= mpb
->family_num
;
5284 for (d
= super
->disks
; d
; d
= d
->next
) {
5288 mpb
->disk
[d
->index
] = d
->disk
;
5292 for (d
= super
->missing
; d
; d
= d
->next
) {
5293 mpb
->disk
[d
->index
] = d
->disk
;
5296 mpb
->num_disks
= num_disks
;
5297 mpb_size
+= sizeof(struct imsm_disk
) * mpb
->num_disks
;
5299 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
5300 struct imsm_dev
*dev
= __get_imsm_dev(mpb
, i
);
5301 struct imsm_dev
*dev2
= get_imsm_dev(super
, i
);
5303 imsm_copy_dev(dev
, dev2
);
5304 mpb_size
+= sizeof_imsm_dev(dev
, 0);
5306 if (is_gen_migration(dev2
))
5307 clear_migration_record
= 0;
5309 mpb_size
+= __le32_to_cpu(mpb
->bbm_log_size
);
5310 mpb
->mpb_size
= __cpu_to_le32(mpb_size
);
5312 /* recalculate checksum */
5313 sum
= __gen_imsm_checksum(mpb
);
5314 mpb
->check_sum
= __cpu_to_le32(sum
);
5316 if (super
->clean_migration_record_by_mdmon
) {
5317 clear_migration_record
= 1;
5318 super
->clean_migration_record_by_mdmon
= 0;
5320 if (clear_migration_record
)
5321 memset(super
->migr_rec_buf
, 0, MIGR_REC_BUF_SIZE
);
5323 /* write the mpb for disks that compose raid devices */
5324 for (d
= super
->disks
; d
; d
= d
->next
) {
5325 if (d
->index
< 0 || is_failed(&d
->disk
))
5328 if (clear_migration_record
) {
5329 unsigned long long dsize
;
5331 get_dev_size(d
->fd
, NULL
, &dsize
);
5332 if (lseek64(d
->fd
, dsize
- 512, SEEK_SET
) >= 0) {
5333 if (write(d
->fd
, super
->migr_rec_buf
,
5334 MIGR_REC_BUF_SIZE
) != MIGR_REC_BUF_SIZE
)
5335 perror("Write migr_rec failed");
5339 if (store_imsm_mpb(d
->fd
, mpb
))
5341 "failed for device %d:%d (fd: %d)%s\n",
5343 d
->fd
, strerror(errno
));
5352 return write_super_imsm_spares(super
, doclose
);
5357 static int create_array(struct supertype
*st
, int dev_idx
)
5360 struct imsm_update_create_array
*u
;
5361 struct intel_super
*super
= st
->sb
;
5362 struct imsm_dev
*dev
= get_imsm_dev(super
, dev_idx
);
5363 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
5364 struct disk_info
*inf
;
5365 struct imsm_disk
*disk
;
5368 len
= sizeof(*u
) - sizeof(*dev
) + sizeof_imsm_dev(dev
, 0) +
5369 sizeof(*inf
) * map
->num_members
;
5371 u
->type
= update_create_array
;
5372 u
->dev_idx
= dev_idx
;
5373 imsm_copy_dev(&u
->dev
, dev
);
5374 inf
= get_disk_info(u
);
5375 for (i
= 0; i
< map
->num_members
; i
++) {
5376 int idx
= get_imsm_disk_idx(dev
, i
, MAP_X
);
5378 disk
= get_imsm_disk(super
, idx
);
5380 disk
= get_imsm_missing(super
, idx
);
5381 serialcpy(inf
[i
].serial
, disk
->serial
);
5383 append_metadata_update(st
, u
, len
);
5388 static int mgmt_disk(struct supertype
*st
)
5390 struct intel_super
*super
= st
->sb
;
5392 struct imsm_update_add_remove_disk
*u
;
5394 if (!super
->disk_mgmt_list
)
5399 u
->type
= update_add_remove_disk
;
5400 append_metadata_update(st
, u
, len
);
5405 static int write_init_super_imsm(struct supertype
*st
)
5407 struct intel_super
*super
= st
->sb
;
5408 int current_vol
= super
->current_vol
;
5410 /* we are done with current_vol reset it to point st at the container */
5411 super
->current_vol
= -1;
5413 if (st
->update_tail
) {
5414 /* queue the recently created array / added disk
5415 * as a metadata update */
5418 /* determine if we are creating a volume or adding a disk */
5419 if (current_vol
< 0) {
5420 /* in the mgmt (add/remove) disk case we are running
5421 * in mdmon context, so don't close fd's
5423 return mgmt_disk(st
);
5425 rv
= create_array(st
, current_vol
);
5430 for (d
= super
->disks
; d
; d
= d
->next
)
5431 Kill(d
->devname
, NULL
, 0, -1, 1);
5432 return write_super_imsm(st
, 1);
5437 static int store_super_imsm(struct supertype
*st
, int fd
)
5439 struct intel_super
*super
= st
->sb
;
5440 struct imsm_super
*mpb
= super
? super
->anchor
: NULL
;
5446 return store_imsm_mpb(fd
, mpb
);
5452 static int imsm_bbm_log_size(struct imsm_super
*mpb
)
5454 return __le32_to_cpu(mpb
->bbm_log_size
);
5458 static int validate_geometry_imsm_container(struct supertype
*st
, int level
,
5459 int layout
, int raiddisks
, int chunk
,
5460 unsigned long long size
,
5461 unsigned long long data_offset
,
5463 unsigned long long *freesize
,
5467 unsigned long long ldsize
;
5468 struct intel_super
*super
;
5471 if (level
!= LEVEL_CONTAINER
)
5476 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
5479 pr_err("imsm: Cannot open %s: %s\n",
5480 dev
, strerror(errno
));
5483 if (!get_dev_size(fd
, dev
, &ldsize
)) {
5488 /* capabilities retrieve could be possible
5489 * note that there is no fd for the disks in array.
5491 super
= alloc_super();
5492 rv
= find_intel_hba_capability(fd
, super
, verbose
> 0 ? dev
: NULL
);
5496 fd2devname(fd
, str
);
5497 dprintf("fd: %d %s orom: %p rv: %d raiddisk: %d\n",
5498 fd
, str
, super
->orom
, rv
, raiddisks
);
5500 /* no orom/efi or non-intel hba of the disk */
5507 if (raiddisks
> super
->orom
->tds
) {
5509 pr_err("%d exceeds maximum number of platform supported disks: %d\n",
5510 raiddisks
, super
->orom
->tds
);
5514 if ((super
->orom
->attr
& IMSM_OROM_ATTR_2TB_DISK
) == 0 &&
5515 (ldsize
>> 9) >> 32 > 0) {
5517 pr_err("%s exceeds maximum platform supported size\n", dev
);
5523 *freesize
= avail_size_imsm(st
, ldsize
>> 9, data_offset
);
5529 static unsigned long long find_size(struct extent
*e
, int *idx
, int num_extents
)
5531 const unsigned long long base_start
= e
[*idx
].start
;
5532 unsigned long long end
= base_start
+ e
[*idx
].size
;
5535 if (base_start
== end
)
5539 for (i
= *idx
; i
< num_extents
; i
++) {
5540 /* extend overlapping extents */
5541 if (e
[i
].start
>= base_start
&&
5542 e
[i
].start
<= end
) {
5545 if (e
[i
].start
+ e
[i
].size
> end
)
5546 end
= e
[i
].start
+ e
[i
].size
;
5547 } else if (e
[i
].start
> end
) {
5553 return end
- base_start
;
5556 static unsigned long long merge_extents(struct intel_super
*super
, int sum_extents
)
5558 /* build a composite disk with all known extents and generate a new
5559 * 'maxsize' given the "all disks in an array must share a common start
5560 * offset" constraint
5562 struct extent
*e
= xcalloc(sum_extents
, sizeof(*e
));
5566 unsigned long long pos
;
5567 unsigned long long start
= 0;
5568 unsigned long long maxsize
;
5569 unsigned long reserve
;
5571 /* coalesce and sort all extents. also, check to see if we need to
5572 * reserve space between member arrays
5575 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
5578 for (i
= 0; i
< dl
->extent_cnt
; i
++)
5581 qsort(e
, sum_extents
, sizeof(*e
), cmp_extent
);
5586 while (i
< sum_extents
) {
5587 e
[j
].start
= e
[i
].start
;
5588 e
[j
].size
= find_size(e
, &i
, sum_extents
);
5590 if (e
[j
-1].size
== 0)
5599 unsigned long long esize
;
5601 esize
= e
[i
].start
- pos
;
5602 if (esize
>= maxsize
) {
5607 pos
= e
[i
].start
+ e
[i
].size
;
5609 } while (e
[i
-1].size
);
5615 /* FIXME assumes volume at offset 0 is the first volume in a
5618 if (start_extent
> 0)
5619 reserve
= IMSM_RESERVED_SECTORS
; /* gap between raid regions */
5623 if (maxsize
< reserve
)
5626 super
->create_offset
= ~((unsigned long long) 0);
5627 if (start
+ reserve
> super
->create_offset
)
5628 return 0; /* start overflows create_offset */
5629 super
->create_offset
= start
+ reserve
;
5631 return maxsize
- reserve
;
5634 static int is_raid_level_supported(const struct imsm_orom
*orom
, int level
, int raiddisks
)
5636 if (level
< 0 || level
== 6 || level
== 4)
5639 /* if we have an orom prevent invalid raid levels */
5642 case 0: return imsm_orom_has_raid0(orom
);
5645 return imsm_orom_has_raid1e(orom
);
5646 return imsm_orom_has_raid1(orom
) && raiddisks
== 2;
5647 case 10: return imsm_orom_has_raid10(orom
) && raiddisks
== 4;
5648 case 5: return imsm_orom_has_raid5(orom
) && raiddisks
> 2;
5651 return 1; /* not on an Intel RAID platform so anything goes */
5657 active_arrays_by_format(char *name
, char* hba
, struct md_list
**devlist
,
5658 int dpa
, int verbose
)
5660 struct mdstat_ent
*mdstat
= mdstat_read(0, 0);
5661 struct mdstat_ent
*memb
;
5667 for (memb
= mdstat
; memb
; memb
= memb
->next
) {
5668 if (memb
->metadata_version
&&
5669 (strncmp(memb
->metadata_version
, "external:", 9) == 0) &&
5670 (strcmp(&memb
->metadata_version
[9], name
) == 0) &&
5671 !is_subarray(memb
->metadata_version
+9) &&
5673 struct dev_member
*dev
= memb
->members
;
5675 while(dev
&& (fd
< 0)) {
5676 char *path
= xmalloc(strlen(dev
->name
) + strlen("/dev/") + 1);
5677 num
= sprintf(path
, "%s%s", "/dev/", dev
->name
);
5679 fd
= open(path
, O_RDONLY
, 0);
5680 if ((num
<= 0) || (fd
< 0)) {
5681 pr_vrb(": Cannot open %s: %s\n",
5682 dev
->name
, strerror(errno
));
5688 if ((fd
>= 0) && disk_attached_to_hba(fd
, hba
)) {
5689 struct mdstat_ent
*vol
;
5690 for (vol
= mdstat
; vol
; vol
= vol
->next
) {
5691 if ((vol
->active
> 0) &&
5692 vol
->metadata_version
&&
5693 is_container_member(vol
, memb
->devnm
)) {
5698 if (*devlist
&& (found
< dpa
)) {
5699 dv
= xcalloc(1, sizeof(*dv
));
5700 dv
->devname
= xmalloc(strlen(memb
->devnm
) + strlen("/dev/") + 1);
5701 sprintf(dv
->devname
, "%s%s", "/dev/", memb
->devnm
);
5704 dv
->next
= *devlist
;
5712 free_mdstat(mdstat
);
5717 static struct md_list
*
5718 get_loop_devices(void)
5721 struct md_list
*devlist
= NULL
;
5724 for(i
= 0; i
< 12; i
++) {
5725 dv
= xcalloc(1, sizeof(*dv
));
5726 dv
->devname
= xmalloc(40);
5727 sprintf(dv
->devname
, "/dev/loop%d", i
);
5735 static struct md_list
*
5736 get_devices(const char *hba_path
)
5738 struct md_list
*devlist
= NULL
;
5745 devlist
= get_loop_devices();
5748 /* scroll through /sys/dev/block looking for devices attached to
5751 dir
= opendir("/sys/dev/block");
5752 for (ent
= dir
? readdir(dir
) : NULL
; ent
; ent
= readdir(dir
)) {
5757 if (sscanf(ent
->d_name
, "%d:%d", &major
, &minor
) != 2)
5759 path
= devt_to_devpath(makedev(major
, minor
));
5762 if (!path_attached_to_hba(path
, hba_path
)) {
5769 fd
= dev_open(ent
->d_name
, O_RDONLY
);
5771 fd2devname(fd
, buf
);
5774 pr_err("cannot open device: %s\n",
5779 dv
= xcalloc(1, sizeof(*dv
));
5780 dv
->devname
= xstrdup(buf
);
5787 devlist
= devlist
->next
;
5797 count_volumes_list(struct md_list
*devlist
, char *homehost
,
5798 int verbose
, int *found
)
5800 struct md_list
*tmpdev
;
5802 struct supertype
*st
;
5804 /* first walk the list of devices to find a consistent set
5805 * that match the criterea, if that is possible.
5806 * We flag the ones we like with 'used'.
5809 st
= match_metadata_desc_imsm("imsm");
5811 pr_vrb(": cannot allocate memory for imsm supertype\n");
5815 for (tmpdev
= devlist
; tmpdev
; tmpdev
= tmpdev
->next
) {
5816 char *devname
= tmpdev
->devname
;
5818 struct supertype
*tst
;
5820 if (tmpdev
->used
> 1)
5822 tst
= dup_super(st
);
5824 pr_vrb(": cannot allocate memory for imsm supertype\n");
5827 tmpdev
->container
= 0;
5828 dfd
= dev_open(devname
, O_RDONLY
|O_EXCL
);
5830 dprintf("cannot open device %s: %s\n",
5831 devname
, strerror(errno
));
5833 } else if (fstat(dfd
, &stb
)< 0) {
5835 dprintf("fstat failed for %s: %s\n",
5836 devname
, strerror(errno
));
5838 } else if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
5839 dprintf("%s is not a block device.\n",
5842 } else if (must_be_container(dfd
)) {
5843 struct supertype
*cst
;
5844 cst
= super_by_fd(dfd
, NULL
);
5846 dprintf("cannot recognize container type %s\n",
5849 } else if (tst
->ss
!= st
->ss
) {
5850 dprintf("non-imsm container - ignore it: %s\n",
5853 } else if (!tst
->ss
->load_container
||
5854 tst
->ss
->load_container(tst
, dfd
, NULL
))
5857 tmpdev
->container
= 1;
5860 cst
->ss
->free_super(cst
);
5862 tmpdev
->st_rdev
= stb
.st_rdev
;
5863 if (tst
->ss
->load_super(tst
,dfd
, NULL
)) {
5864 dprintf("no RAID superblock on %s\n",
5867 } else if (tst
->ss
->compare_super
== NULL
) {
5868 dprintf("Cannot assemble %s metadata on %s\n",
5869 tst
->ss
->name
, devname
);
5875 if (tmpdev
->used
== 2 || tmpdev
->used
== 4) {
5876 /* Ignore unrecognised devices during auto-assembly */
5881 tst
->ss
->getinfo_super(tst
, &info
, NULL
);
5883 if (st
->minor_version
== -1)
5884 st
->minor_version
= tst
->minor_version
;
5886 if (memcmp(info
.uuid
, uuid_zero
,
5887 sizeof(int[4])) == 0) {
5888 /* this is a floating spare. It cannot define
5889 * an array unless there are no more arrays of
5890 * this type to be found. It can be included
5891 * in an array of this type though.
5897 if (st
->ss
!= tst
->ss
||
5898 st
->minor_version
!= tst
->minor_version
||
5899 st
->ss
->compare_super(st
, tst
) != 0) {
5900 /* Some mismatch. If exactly one array matches this host,
5901 * we can resolve on that one.
5902 * Or, if we are auto assembling, we just ignore the second
5905 dprintf("superblock on %s doesn't match others - assembly aborted\n",
5911 dprintf("found: devname: %s\n", devname
);
5915 tst
->ss
->free_super(tst
);
5919 if ((err
= load_super_imsm_all(st
, -1, &st
->sb
, NULL
, devlist
, 0)) == 0) {
5920 struct mdinfo
*iter
, *head
= st
->ss
->container_content(st
, NULL
);
5921 for (iter
= head
; iter
; iter
= iter
->next
) {
5922 dprintf("content->text_version: %s vol\n",
5923 iter
->text_version
);
5924 if (iter
->array
.state
& (1<<MD_SB_BLOCK_VOLUME
)) {
5925 /* do not assemble arrays with unsupported
5927 dprintf("Cannot activate member %s.\n",
5928 iter
->text_version
);
5935 dprintf("No valid super block on device list: err: %d %p\n",
5939 dprintf("no more devices to examine\n");
5942 for (tmpdev
= devlist
; tmpdev
; tmpdev
= tmpdev
->next
) {
5943 if ((tmpdev
->used
== 1) && (tmpdev
->found
)) {
5945 if (count
< tmpdev
->found
)
5948 count
-= tmpdev
->found
;
5951 if (tmpdev
->used
== 1)
5956 st
->ss
->free_super(st
);
5961 count_volumes(struct intel_hba
*hba
, int dpa
, int verbose
)
5963 struct sys_dev
*idev
, *intel_devices
= find_intel_devices();
5965 const struct orom_entry
*entry
;
5966 struct devid_list
*dv
, *devid_list
;
5968 if (!hba
|| !hba
->path
)
5971 for (idev
= intel_devices
; idev
; idev
= idev
->next
) {
5972 if (strstr(idev
->path
, hba
->path
))
5976 if (!idev
|| !idev
->dev_id
)
5979 entry
= get_orom_entry_by_device_id(idev
->dev_id
);
5981 if (!entry
|| !entry
->devid_list
)
5984 devid_list
= entry
->devid_list
;
5985 for (dv
= devid_list
; dv
; dv
= dv
->next
) {
5986 struct md_list
*devlist
;
5987 struct sys_dev
*device
= device_by_id(dv
->devid
);
5992 hba_path
= device
->path
;
5996 /* VMD has one orom entry for all domain, but spanning is not allowed.
5997 * VMD arrays should be counted per domain (controller), so skip
5998 * domains that are not the given one.
6000 if ((hba
->type
== SYS_DEV_VMD
) &&
6001 (strncmp(device
->path
, hba
->path
, strlen(device
->path
)) != 0))
6004 devlist
= get_devices(hba_path
);
6005 /* if no intel devices return zero volumes */
6006 if (devlist
== NULL
)
6009 count
+= active_arrays_by_format("imsm", hba_path
, &devlist
, dpa
, verbose
);
6010 dprintf("path: %s active arrays: %d\n", hba_path
, count
);
6011 if (devlist
== NULL
)
6015 count
+= count_volumes_list(devlist
,
6019 dprintf("found %d count: %d\n", found
, count
);
6022 dprintf("path: %s total number of volumes: %d\n", hba_path
, count
);
6025 struct md_list
*dv
= devlist
;
6026 devlist
= devlist
->next
;
6034 static int imsm_default_chunk(const struct imsm_orom
*orom
)
6036 /* up to 512 if the plaform supports it, otherwise the platform max.
6037 * 128 if no platform detected
6039 int fs
= max(7, orom
? fls(orom
->sss
) : 0);
6041 return min(512, (1 << fs
));
6045 validate_geometry_imsm_orom(struct intel_super
*super
, int level
, int layout
,
6046 int raiddisks
, int *chunk
, unsigned long long size
, int verbose
)
6048 /* check/set platform and metadata limits/defaults */
6049 if (super
->orom
&& raiddisks
> super
->orom
->dpa
) {
6050 pr_vrb(": platform supports a maximum of %d disks per array\n",
6055 /* capabilities of OROM tested - copied from validate_geometry_imsm_volume */
6056 if (!is_raid_level_supported(super
->orom
, level
, raiddisks
)) {
6057 pr_vrb(": platform does not support raid%d with %d disk%s\n",
6058 level
, raiddisks
, raiddisks
> 1 ? "s" : "");
6062 if (*chunk
== 0 || *chunk
== UnSet
)
6063 *chunk
= imsm_default_chunk(super
->orom
);
6065 if (super
->orom
&& !imsm_orom_has_chunk(super
->orom
, *chunk
)) {
6066 pr_vrb(": platform does not support a chunk size of: %d\n", *chunk
);
6070 if (layout
!= imsm_level_to_layout(level
)) {
6072 pr_vrb(": imsm raid 5 only supports the left-asymmetric layout\n");
6073 else if (level
== 10)
6074 pr_vrb(": imsm raid 10 only supports the n2 layout\n");
6076 pr_vrb(": imsm unknown layout %#x for this raid level %d\n",
6081 if (super
->orom
&& (super
->orom
->attr
& IMSM_OROM_ATTR_2TB
) == 0 &&
6082 (calc_array_size(level
, raiddisks
, layout
, *chunk
, size
) >> 32) > 0) {
6083 pr_vrb(": platform does not support a volume size over 2TB\n");
6090 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
6091 * FIX ME add ahci details
6093 static int validate_geometry_imsm_volume(struct supertype
*st
, int level
,
6094 int layout
, int raiddisks
, int *chunk
,
6095 unsigned long long size
,
6096 unsigned long long data_offset
,
6098 unsigned long long *freesize
,
6102 struct intel_super
*super
= st
->sb
;
6103 struct imsm_super
*mpb
;
6105 unsigned long long pos
= 0;
6106 unsigned long long maxsize
;
6110 /* We must have the container info already read in. */
6114 mpb
= super
->anchor
;
6116 if (!validate_geometry_imsm_orom(super
, level
, layout
, raiddisks
, chunk
, size
, verbose
)) {
6117 pr_err("RAID gemetry validation failed. Cannot proceed with the action(s).\n");
6121 /* General test: make sure there is space for
6122 * 'raiddisks' device extents of size 'size' at a given
6125 unsigned long long minsize
= size
;
6126 unsigned long long start_offset
= MaxSector
;
6129 minsize
= MPB_SECTOR_CNT
+ IMSM_RESERVED_SECTORS
;
6130 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
6135 e
= get_extents(super
, dl
);
6138 unsigned long long esize
;
6139 esize
= e
[i
].start
- pos
;
6140 if (esize
>= minsize
)
6142 if (found
&& start_offset
== MaxSector
) {
6145 } else if (found
&& pos
!= start_offset
) {
6149 pos
= e
[i
].start
+ e
[i
].size
;
6151 } while (e
[i
-1].size
);
6156 if (dcnt
< raiddisks
) {
6158 pr_err("imsm: Not enough devices with space for this array (%d < %d)\n",
6165 /* This device must be a member of the set */
6166 if (stat(dev
, &stb
) < 0)
6168 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
6170 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
6171 if (dl
->major
== (int)major(stb
.st_rdev
) &&
6172 dl
->minor
== (int)minor(stb
.st_rdev
))
6177 pr_err("%s is not in the same imsm set\n", dev
);
6179 } else if (super
->orom
&& dl
->index
< 0 && mpb
->num_raid_devs
) {
6180 /* If a volume is present then the current creation attempt
6181 * cannot incorporate new spares because the orom may not
6182 * understand this configuration (all member disks must be
6183 * members of each array in the container).
6185 pr_err("%s is a spare and a volume is already defined for this container\n", dev
);
6186 pr_err("The option-rom requires all member disks to be a member of all volumes\n");
6188 } else if (super
->orom
&& mpb
->num_raid_devs
> 0 &&
6189 mpb
->num_disks
!= raiddisks
) {
6190 pr_err("The option-rom requires all member disks to be a member of all volumes\n");
6194 /* retrieve the largest free space block */
6195 e
= get_extents(super
, dl
);
6200 unsigned long long esize
;
6202 esize
= e
[i
].start
- pos
;
6203 if (esize
>= maxsize
)
6205 pos
= e
[i
].start
+ e
[i
].size
;
6207 } while (e
[i
-1].size
);
6212 pr_err("unable to determine free space for: %s\n",
6216 if (maxsize
< size
) {
6218 pr_err("%s not enough space (%llu < %llu)\n",
6219 dev
, maxsize
, size
);
6223 /* count total number of extents for merge */
6225 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
6227 i
+= dl
->extent_cnt
;
6229 maxsize
= merge_extents(super
, i
);
6231 if (!check_env("IMSM_NO_PLATFORM") &&
6232 mpb
->num_raid_devs
> 0 && size
&& size
!= maxsize
) {
6233 pr_err("attempting to create a second volume with size less then remaining space. Aborting...\n");
6237 if (maxsize
< size
|| maxsize
== 0) {
6240 pr_err("no free space left on device. Aborting...\n");
6242 pr_err("not enough space to create volume of given size (%llu < %llu). Aborting...\n",
6248 *freesize
= maxsize
;
6251 int count
= count_volumes(super
->hba
,
6252 super
->orom
->dpa
, verbose
);
6253 if (super
->orom
->vphba
<= count
) {
6254 pr_vrb(": platform does not support more than %d raid volumes.\n",
6255 super
->orom
->vphba
);
6262 static int imsm_get_free_size(struct supertype
*st
, int raiddisks
,
6263 unsigned long long size
, int chunk
,
6264 unsigned long long *freesize
)
6266 struct intel_super
*super
= st
->sb
;
6267 struct imsm_super
*mpb
= super
->anchor
;
6272 unsigned long long maxsize
;
6273 unsigned long long minsize
;
6277 /* find the largest common start free region of the possible disks */
6281 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
6287 /* don't activate new spares if we are orom constrained
6288 * and there is already a volume active in the container
6290 if (super
->orom
&& dl
->index
< 0 && mpb
->num_raid_devs
)
6293 e
= get_extents(super
, dl
);
6296 for (i
= 1; e
[i
-1].size
; i
++)
6304 maxsize
= merge_extents(super
, extent_cnt
);
6308 minsize
= chunk
* 2;
6310 if (cnt
< raiddisks
||
6311 (super
->orom
&& used
&& used
!= raiddisks
) ||
6312 maxsize
< minsize
||
6314 pr_err("not enough devices with space to create array.\n");
6315 return 0; /* No enough free spaces large enough */
6326 if (!check_env("IMSM_NO_PLATFORM") &&
6327 mpb
->num_raid_devs
> 0 && size
&& size
!= maxsize
) {
6328 pr_err("attempting to create a second volume with size less then remaining space. Aborting...\n");
6332 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
6334 dl
->raiddisk
= cnt
++;
6338 dprintf("imsm: imsm_get_free_size() returns : %llu\n", size
);
6343 static int reserve_space(struct supertype
*st
, int raiddisks
,
6344 unsigned long long size
, int chunk
,
6345 unsigned long long *freesize
)
6347 struct intel_super
*super
= st
->sb
;
6352 rv
= imsm_get_free_size(st
, raiddisks
, size
, chunk
, freesize
);
6355 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
6357 dl
->raiddisk
= cnt
++;
6364 static int validate_geometry_imsm(struct supertype
*st
, int level
, int layout
,
6365 int raiddisks
, int *chunk
, unsigned long long size
,
6366 unsigned long long data_offset
,
6367 char *dev
, unsigned long long *freesize
,
6375 * if given unused devices create a container
6376 * if given given devices in a container create a member volume
6378 if (level
== LEVEL_CONTAINER
) {
6379 /* Must be a fresh device to add to a container */
6380 return validate_geometry_imsm_container(st
, level
, layout
,
6390 struct intel_super
*super
= st
->sb
;
6391 if (!validate_geometry_imsm_orom(st
->sb
, level
, layout
,
6392 raiddisks
, chunk
, size
,
6395 /* we are being asked to automatically layout a
6396 * new volume based on the current contents of
6397 * the container. If the the parameters can be
6398 * satisfied reserve_space will record the disks,
6399 * start offset, and size of the volume to be
6400 * created. add_to_super and getinfo_super
6401 * detect when autolayout is in progress.
6403 /* assuming that freesize is always given when array is
6405 if (super
->orom
&& freesize
) {
6407 count
= count_volumes(super
->hba
,
6408 super
->orom
->dpa
, verbose
);
6409 if (super
->orom
->vphba
<= count
) {
6410 pr_vrb(": platform does not support more than %d raid volumes.\n",
6411 super
->orom
->vphba
);
6416 return reserve_space(st
, raiddisks
, size
,
6422 /* creating in a given container */
6423 return validate_geometry_imsm_volume(st
, level
, layout
,
6424 raiddisks
, chunk
, size
,
6426 dev
, freesize
, verbose
);
6429 /* This device needs to be a device in an 'imsm' container */
6430 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
6433 pr_err("Cannot create this array on device %s\n",
6438 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
6440 pr_err("Cannot open %s: %s\n",
6441 dev
, strerror(errno
));
6444 /* Well, it is in use by someone, maybe an 'imsm' container. */
6445 cfd
= open_container(fd
);
6449 pr_err("Cannot use %s: It is busy\n",
6453 sra
= sysfs_read(cfd
, NULL
, GET_VERSION
);
6454 if (sra
&& sra
->array
.major_version
== -1 &&
6455 strcmp(sra
->text_version
, "imsm") == 0)
6459 /* This is a member of a imsm container. Load the container
6460 * and try to create a volume
6462 struct intel_super
*super
;
6464 if (load_super_imsm_all(st
, cfd
, (void **) &super
, NULL
, NULL
, 1) == 0) {
6466 strcpy(st
->container_devnm
, fd2devnm(cfd
));
6468 return validate_geometry_imsm_volume(st
, level
, layout
,
6470 size
, data_offset
, dev
,
6477 pr_err("failed container membership check\n");
6483 static void default_geometry_imsm(struct supertype
*st
, int *level
, int *layout
, int *chunk
)
6485 struct intel_super
*super
= st
->sb
;
6487 if (level
&& *level
== UnSet
)
6488 *level
= LEVEL_CONTAINER
;
6490 if (level
&& layout
&& *layout
== UnSet
)
6491 *layout
= imsm_level_to_layout(*level
);
6493 if (chunk
&& (*chunk
== UnSet
|| *chunk
== 0))
6494 *chunk
= imsm_default_chunk(super
->orom
);
6497 static void handle_missing(struct intel_super
*super
, struct imsm_dev
*dev
);
6499 static int kill_subarray_imsm(struct supertype
*st
)
6501 /* remove the subarray currently referenced by ->current_vol */
6503 struct intel_dev
**dp
;
6504 struct intel_super
*super
= st
->sb
;
6505 __u8 current_vol
= super
->current_vol
;
6506 struct imsm_super
*mpb
= super
->anchor
;
6508 if (super
->current_vol
< 0)
6510 super
->current_vol
= -1; /* invalidate subarray cursor */
6512 /* block deletions that would change the uuid of active subarrays
6514 * FIXME when immutable ids are available, but note that we'll
6515 * also need to fixup the invalidated/active subarray indexes in
6518 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
6521 if (i
< current_vol
)
6523 sprintf(subarray
, "%u", i
);
6524 if (is_subarray_active(subarray
, st
->devnm
)) {
6525 pr_err("deleting subarray-%d would change the UUID of active subarray-%d, aborting\n",
6532 if (st
->update_tail
) {
6533 struct imsm_update_kill_array
*u
= xmalloc(sizeof(*u
));
6535 u
->type
= update_kill_array
;
6536 u
->dev_idx
= current_vol
;
6537 append_metadata_update(st
, u
, sizeof(*u
));
6542 for (dp
= &super
->devlist
; *dp
;)
6543 if ((*dp
)->index
== current_vol
) {
6546 handle_missing(super
, (*dp
)->dev
);
6547 if ((*dp
)->index
> current_vol
)
6552 /* no more raid devices, all active components are now spares,
6553 * but of course failed are still failed
6555 if (--mpb
->num_raid_devs
== 0) {
6558 for (d
= super
->disks
; d
; d
= d
->next
)
6563 super
->updates_pending
++;
6568 static int update_subarray_imsm(struct supertype
*st
, char *subarray
,
6569 char *update
, struct mddev_ident
*ident
)
6571 /* update the subarray currently referenced by ->current_vol */
6572 struct intel_super
*super
= st
->sb
;
6573 struct imsm_super
*mpb
= super
->anchor
;
6575 if (strcmp(update
, "name") == 0) {
6576 char *name
= ident
->name
;
6580 if (is_subarray_active(subarray
, st
->devnm
)) {
6581 pr_err("Unable to update name of active subarray\n");
6585 if (!check_name(super
, name
, 0))
6588 vol
= strtoul(subarray
, &ep
, 10);
6589 if (*ep
!= '\0' || vol
>= super
->anchor
->num_raid_devs
)
6592 if (st
->update_tail
) {
6593 struct imsm_update_rename_array
*u
= xmalloc(sizeof(*u
));
6595 u
->type
= update_rename_array
;
6597 snprintf((char *) u
->name
, MAX_RAID_SERIAL_LEN
, "%s", name
);
6598 append_metadata_update(st
, u
, sizeof(*u
));
6600 struct imsm_dev
*dev
;
6603 dev
= get_imsm_dev(super
, vol
);
6604 snprintf((char *) dev
->volume
, MAX_RAID_SERIAL_LEN
, "%s", name
);
6605 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
6606 dev
= get_imsm_dev(super
, i
);
6607 handle_missing(super
, dev
);
6609 super
->updates_pending
++;
6616 #endif /* MDASSEMBLE */
6618 static int is_gen_migration(struct imsm_dev
*dev
)
6623 if (!dev
->vol
.migr_state
)
6626 if (migr_type(dev
) == MIGR_GEN_MIGR
)
6632 static int is_rebuilding(struct imsm_dev
*dev
)
6634 struct imsm_map
*migr_map
;
6636 if (!dev
->vol
.migr_state
)
6639 if (migr_type(dev
) != MIGR_REBUILD
)
6642 migr_map
= get_imsm_map(dev
, MAP_1
);
6644 if (migr_map
->map_state
== IMSM_T_STATE_DEGRADED
)
6651 static int is_initializing(struct imsm_dev
*dev
)
6653 struct imsm_map
*migr_map
;
6655 if (!dev
->vol
.migr_state
)
6658 if (migr_type(dev
) != MIGR_INIT
)
6661 migr_map
= get_imsm_map(dev
, MAP_1
);
6663 if (migr_map
->map_state
== IMSM_T_STATE_UNINITIALIZED
)
6670 static void update_recovery_start(struct intel_super
*super
,
6671 struct imsm_dev
*dev
,
6672 struct mdinfo
*array
)
6674 struct mdinfo
*rebuild
= NULL
;
6678 if (!is_rebuilding(dev
))
6681 /* Find the rebuild target, but punt on the dual rebuild case */
6682 for (d
= array
->devs
; d
; d
= d
->next
)
6683 if (d
->recovery_start
== 0) {
6690 /* (?) none of the disks are marked with
6691 * IMSM_ORD_REBUILD, so assume they are missing and the
6692 * disk_ord_tbl was not correctly updated
6694 dprintf("failed to locate out-of-sync disk\n");
6698 units
= __le32_to_cpu(dev
->vol
.curr_migr_unit
);
6699 rebuild
->recovery_start
= units
* blocks_per_migr_unit(super
, dev
);
6703 static int recover_backup_imsm(struct supertype
*st
, struct mdinfo
*info
);
6706 static struct mdinfo
*container_content_imsm(struct supertype
*st
, char *subarray
)
6708 /* Given a container loaded by load_super_imsm_all,
6709 * extract information about all the arrays into
6711 * If 'subarray' is given, just extract info about that array.
6713 * For each imsm_dev create an mdinfo, fill it in,
6714 * then look for matching devices in super->disks
6715 * and create appropriate device mdinfo.
6717 struct intel_super
*super
= st
->sb
;
6718 struct imsm_super
*mpb
= super
->anchor
;
6719 struct mdinfo
*rest
= NULL
;
6723 int spare_disks
= 0;
6725 /* do not assemble arrays when not all attributes are supported */
6726 if (imsm_check_attributes(mpb
->attributes
) == 0) {
6728 pr_err("Unsupported attributes in IMSM metadata.Arrays activation is blocked.\n");
6731 /* check for bad blocks */
6732 if (imsm_bbm_log_size(super
->anchor
)) {
6733 pr_err("BBM log found in IMSM metadata.Arrays activation is blocked.\n");
6737 /* count spare devices, not used in maps
6739 for (d
= super
->disks
; d
; d
= d
->next
)
6743 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
6744 struct imsm_dev
*dev
;
6745 struct imsm_map
*map
;
6746 struct imsm_map
*map2
;
6747 struct mdinfo
*this;
6755 (i
!= strtoul(subarray
, &ep
, 10) || *ep
!= '\0'))
6758 dev
= get_imsm_dev(super
, i
);
6759 map
= get_imsm_map(dev
, MAP_0
);
6760 map2
= get_imsm_map(dev
, MAP_1
);
6762 /* do not publish arrays that are in the middle of an
6763 * unsupported migration
6765 if (dev
->vol
.migr_state
&&
6766 (migr_type(dev
) == MIGR_STATE_CHANGE
)) {
6767 pr_err("cannot assemble volume '%.16s': unsupported migration in progress\n",
6771 /* do not publish arrays that are not support by controller's
6775 this = xmalloc(sizeof(*this));
6777 super
->current_vol
= i
;
6778 getinfo_super_imsm_volume(st
, this, NULL
);
6781 chunk
= __le16_to_cpu(map
->blocks_per_strip
) >> 1;
6782 /* mdadm does not support all metadata features- set the bit in all arrays state */
6783 if (!validate_geometry_imsm_orom(super
,
6784 get_imsm_raid_level(map
), /* RAID level */
6785 imsm_level_to_layout(get_imsm_raid_level(map
)),
6786 map
->num_members
, /* raid disks */
6787 &chunk
, join_u32(dev
->size_low
, dev
->size_high
),
6789 pr_err("IMSM RAID geometry validation failed. Array %s activation is blocked.\n",
6791 this->array
.state
|=
6792 (1<<MD_SB_BLOCK_CONTAINER_RESHAPE
) |
6793 (1<<MD_SB_BLOCK_VOLUME
);
6797 /* if array has bad blocks, set suitable bit in all arrays state */
6799 this->array
.state
|=
6800 (1<<MD_SB_BLOCK_CONTAINER_RESHAPE
) |
6801 (1<<MD_SB_BLOCK_VOLUME
);
6803 for (slot
= 0 ; slot
< map
->num_members
; slot
++) {
6804 unsigned long long recovery_start
;
6805 struct mdinfo
*info_d
;
6812 idx
= get_imsm_disk_idx(dev
, slot
, MAP_0
);
6813 ord
= get_imsm_ord_tbl_ent(dev
, slot
, MAP_X
);
6814 for (d
= super
->disks
; d
; d
= d
->next
)
6815 if (d
->index
== idx
)
6818 recovery_start
= MaxSector
;
6821 if (d
&& is_failed(&d
->disk
))
6823 if (ord
& IMSM_ORD_REBUILD
)
6827 * if we skip some disks the array will be assmebled degraded;
6828 * reset resync start to avoid a dirty-degraded
6829 * situation when performing the intial sync
6831 * FIXME handle dirty degraded
6833 if ((skip
|| recovery_start
== 0) && !dev
->vol
.dirty
)
6834 this->resync_start
= MaxSector
;
6838 info_d
= xcalloc(1, sizeof(*info_d
));
6839 info_d
->next
= this->devs
;
6840 this->devs
= info_d
;
6842 info_d
->disk
.number
= d
->index
;
6843 info_d
->disk
.major
= d
->major
;
6844 info_d
->disk
.minor
= d
->minor
;
6845 info_d
->disk
.raid_disk
= slot
;
6846 info_d
->recovery_start
= recovery_start
;
6848 if (slot
< map2
->num_members
)
6849 info_d
->disk
.state
= (1 << MD_DISK_ACTIVE
);
6851 this->array
.spare_disks
++;
6853 if (slot
< map
->num_members
)
6854 info_d
->disk
.state
= (1 << MD_DISK_ACTIVE
);
6856 this->array
.spare_disks
++;
6858 if (info_d
->recovery_start
== MaxSector
)
6859 this->array
.working_disks
++;
6861 info_d
->events
= __le32_to_cpu(mpb
->generation_num
);
6862 info_d
->data_offset
= pba_of_lba0(map
);
6863 info_d
->component_size
= blocks_per_member(map
);
6865 /* now that the disk list is up-to-date fixup recovery_start */
6866 update_recovery_start(super
, dev
, this);
6867 this->array
.spare_disks
+= spare_disks
;
6870 /* check for reshape */
6871 if (this->reshape_active
== 1)
6872 recover_backup_imsm(st
, this);
6880 static __u8
imsm_check_degraded(struct intel_super
*super
, struct imsm_dev
*dev
,
6881 int failed
, int look_in_map
)
6883 struct imsm_map
*map
;
6885 map
= get_imsm_map(dev
, look_in_map
);
6888 return map
->map_state
== IMSM_T_STATE_UNINITIALIZED
?
6889 IMSM_T_STATE_UNINITIALIZED
: IMSM_T_STATE_NORMAL
;
6891 switch (get_imsm_raid_level(map
)) {
6893 return IMSM_T_STATE_FAILED
;
6896 if (failed
< map
->num_members
)
6897 return IMSM_T_STATE_DEGRADED
;
6899 return IMSM_T_STATE_FAILED
;
6904 * check to see if any mirrors have failed, otherwise we
6905 * are degraded. Even numbered slots are mirrored on
6909 /* gcc -Os complains that this is unused */
6910 int insync
= insync
;
6912 for (i
= 0; i
< map
->num_members
; i
++) {
6913 __u32 ord
= get_imsm_ord_tbl_ent(dev
, i
, MAP_X
);
6914 int idx
= ord_to_idx(ord
);
6915 struct imsm_disk
*disk
;
6917 /* reset the potential in-sync count on even-numbered
6918 * slots. num_copies is always 2 for imsm raid10
6923 disk
= get_imsm_disk(super
, idx
);
6924 if (!disk
|| is_failed(disk
) || ord
& IMSM_ORD_REBUILD
)
6927 /* no in-sync disks left in this mirror the
6931 return IMSM_T_STATE_FAILED
;
6934 return IMSM_T_STATE_DEGRADED
;
6938 return IMSM_T_STATE_DEGRADED
;
6940 return IMSM_T_STATE_FAILED
;
6946 return map
->map_state
;
6949 static int imsm_count_failed(struct intel_super
*super
, struct imsm_dev
*dev
,
6954 struct imsm_disk
*disk
;
6955 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
6956 struct imsm_map
*prev
= get_imsm_map(dev
, MAP_1
);
6957 struct imsm_map
*map_for_loop
;
6962 /* at the beginning of migration we set IMSM_ORD_REBUILD on
6963 * disks that are being rebuilt. New failures are recorded to
6964 * map[0]. So we look through all the disks we started with and
6965 * see if any failures are still present, or if any new ones
6969 if (prev
&& (map
->num_members
< prev
->num_members
))
6970 map_for_loop
= prev
;
6972 for (i
= 0; i
< map_for_loop
->num_members
; i
++) {
6974 /* when MAP_X is passed both maps failures are counted
6977 ((look_in_map
== MAP_1
) || (look_in_map
== MAP_X
)) &&
6978 (i
< prev
->num_members
)) {
6979 ord
= __le32_to_cpu(prev
->disk_ord_tbl
[i
]);
6980 idx_1
= ord_to_idx(ord
);
6982 disk
= get_imsm_disk(super
, idx_1
);
6983 if (!disk
|| is_failed(disk
) || ord
& IMSM_ORD_REBUILD
)
6986 if (((look_in_map
== MAP_0
) || (look_in_map
== MAP_X
)) &&
6987 (i
< map
->num_members
)) {
6988 ord
= __le32_to_cpu(map
->disk_ord_tbl
[i
]);
6989 idx
= ord_to_idx(ord
);
6992 disk
= get_imsm_disk(super
, idx
);
6993 if (!disk
|| is_failed(disk
) ||
6994 ord
& IMSM_ORD_REBUILD
)
7004 static int imsm_open_new(struct supertype
*c
, struct active_array
*a
,
7007 struct intel_super
*super
= c
->sb
;
7008 struct imsm_super
*mpb
= super
->anchor
;
7010 if (atoi(inst
) >= mpb
->num_raid_devs
) {
7011 pr_err("subarry index %d, out of range\n", atoi(inst
));
7015 dprintf("imsm: open_new %s\n", inst
);
7016 a
->info
.container_member
= atoi(inst
);
7020 static int is_resyncing(struct imsm_dev
*dev
)
7022 struct imsm_map
*migr_map
;
7024 if (!dev
->vol
.migr_state
)
7027 if (migr_type(dev
) == MIGR_INIT
||
7028 migr_type(dev
) == MIGR_REPAIR
)
7031 if (migr_type(dev
) == MIGR_GEN_MIGR
)
7034 migr_map
= get_imsm_map(dev
, MAP_1
);
7036 if ((migr_map
->map_state
== IMSM_T_STATE_NORMAL
) &&
7037 (dev
->vol
.migr_type
!= MIGR_GEN_MIGR
))
7043 /* return true if we recorded new information */
7044 static int mark_failure(struct imsm_dev
*dev
, struct imsm_disk
*disk
, int idx
)
7048 struct imsm_map
*map
;
7049 char buf
[MAX_RAID_SERIAL_LEN
+3];
7050 unsigned int len
, shift
= 0;
7052 /* new failures are always set in map[0] */
7053 map
= get_imsm_map(dev
, MAP_0
);
7055 slot
= get_imsm_disk_slot(map
, idx
);
7059 ord
= __le32_to_cpu(map
->disk_ord_tbl
[slot
]);
7060 if (is_failed(disk
) && (ord
& IMSM_ORD_REBUILD
))
7063 memcpy(buf
, disk
->serial
, MAX_RAID_SERIAL_LEN
);
7064 buf
[MAX_RAID_SERIAL_LEN
] = '\000';
7066 if ((len
= strlen(buf
)) >= MAX_RAID_SERIAL_LEN
)
7067 shift
= len
- MAX_RAID_SERIAL_LEN
+ 1;
7068 strncpy((char *)disk
->serial
, &buf
[shift
], MAX_RAID_SERIAL_LEN
);
7070 disk
->status
|= FAILED_DISK
;
7071 set_imsm_ord_tbl_ent(map
, slot
, idx
| IMSM_ORD_REBUILD
);
7072 /* mark failures in second map if second map exists and this disk
7074 * This is valid for migration, initialization and rebuild
7076 if (dev
->vol
.migr_state
) {
7077 struct imsm_map
*map2
= get_imsm_map(dev
, MAP_1
);
7078 int slot2
= get_imsm_disk_slot(map2
, idx
);
7080 if ((slot2
< map2
->num_members
) &&
7082 set_imsm_ord_tbl_ent(map2
, slot2
,
7083 idx
| IMSM_ORD_REBUILD
);
7085 if (map
->failed_disk_num
== 0xff)
7086 map
->failed_disk_num
= slot
;
7090 static void mark_missing(struct imsm_dev
*dev
, struct imsm_disk
*disk
, int idx
)
7092 mark_failure(dev
, disk
, idx
);
7094 if (disk
->scsi_id
== __cpu_to_le32(~(__u32
)0))
7097 disk
->scsi_id
= __cpu_to_le32(~(__u32
)0);
7098 memmove(&disk
->serial
[0], &disk
->serial
[1], MAX_RAID_SERIAL_LEN
- 1);
7101 static void handle_missing(struct intel_super
*super
, struct imsm_dev
*dev
)
7105 if (!super
->missing
)
7108 /* When orom adds replacement for missing disk it does
7109 * not remove entry of missing disk, but just updates map with
7110 * new added disk. So it is not enough just to test if there is
7111 * any missing disk, we have to look if there are any failed disks
7112 * in map to stop migration */
7114 dprintf("imsm: mark missing\n");
7115 /* end process for initialization and rebuild only
7117 if (is_gen_migration(dev
) == 0) {
7121 failed
= imsm_count_failed(super
, dev
, MAP_0
);
7122 map_state
= imsm_check_degraded(super
, dev
, failed
, MAP_0
);
7125 end_migration(dev
, super
, map_state
);
7127 for (dl
= super
->missing
; dl
; dl
= dl
->next
)
7128 mark_missing(dev
, &dl
->disk
, dl
->index
);
7129 super
->updates_pending
++;
7132 static unsigned long long imsm_set_array_size(struct imsm_dev
*dev
,
7135 int used_disks
= imsm_num_data_members(dev
, MAP_0
);
7136 unsigned long long array_blocks
;
7137 struct imsm_map
*map
;
7139 if (used_disks
== 0) {
7140 /* when problems occures
7141 * return current array_blocks value
7143 array_blocks
= __le32_to_cpu(dev
->size_high
);
7144 array_blocks
= array_blocks
<< 32;
7145 array_blocks
+= __le32_to_cpu(dev
->size_low
);
7147 return array_blocks
;
7150 /* set array size in metadata
7152 if (new_size
<= 0) {
7153 /* OLCE size change is caused by added disks
7155 map
= get_imsm_map(dev
, MAP_0
);
7156 array_blocks
= blocks_per_member(map
) * used_disks
;
7158 /* Online Volume Size Change
7159 * Using available free space
7161 array_blocks
= new_size
;
7164 /* round array size down to closest MB
7166 array_blocks
= (array_blocks
>> SECT_PER_MB_SHIFT
) << SECT_PER_MB_SHIFT
;
7167 dev
->size_low
= __cpu_to_le32((__u32
)array_blocks
);
7168 dev
->size_high
= __cpu_to_le32((__u32
)(array_blocks
>> 32));
7170 return array_blocks
;
7173 static void imsm_set_disk(struct active_array
*a
, int n
, int state
);
7175 static void imsm_progress_container_reshape(struct intel_super
*super
)
7177 /* if no device has a migr_state, but some device has a
7178 * different number of members than the previous device, start
7179 * changing the number of devices in this device to match
7182 struct imsm_super
*mpb
= super
->anchor
;
7183 int prev_disks
= -1;
7187 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
7188 struct imsm_dev
*dev
= get_imsm_dev(super
, i
);
7189 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
7190 struct imsm_map
*map2
;
7191 int prev_num_members
;
7193 if (dev
->vol
.migr_state
)
7196 if (prev_disks
== -1)
7197 prev_disks
= map
->num_members
;
7198 if (prev_disks
== map
->num_members
)
7201 /* OK, this array needs to enter reshape mode.
7202 * i.e it needs a migr_state
7205 copy_map_size
= sizeof_imsm_map(map
);
7206 prev_num_members
= map
->num_members
;
7207 map
->num_members
= prev_disks
;
7208 dev
->vol
.migr_state
= 1;
7209 dev
->vol
.curr_migr_unit
= 0;
7210 set_migr_type(dev
, MIGR_GEN_MIGR
);
7211 for (i
= prev_num_members
;
7212 i
< map
->num_members
; i
++)
7213 set_imsm_ord_tbl_ent(map
, i
, i
);
7214 map2
= get_imsm_map(dev
, MAP_1
);
7215 /* Copy the current map */
7216 memcpy(map2
, map
, copy_map_size
);
7217 map2
->num_members
= prev_num_members
;
7219 imsm_set_array_size(dev
, -1);
7220 super
->clean_migration_record_by_mdmon
= 1;
7221 super
->updates_pending
++;
7225 /* Handle dirty -> clean transititions, resync and reshape. Degraded and rebuild
7226 * states are handled in imsm_set_disk() with one exception, when a
7227 * resync is stopped due to a new failure this routine will set the
7228 * 'degraded' state for the array.
7230 static int imsm_set_array_state(struct active_array
*a
, int consistent
)
7232 int inst
= a
->info
.container_member
;
7233 struct intel_super
*super
= a
->container
->sb
;
7234 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
7235 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
7236 int failed
= imsm_count_failed(super
, dev
, MAP_0
);
7237 __u8 map_state
= imsm_check_degraded(super
, dev
, failed
, MAP_0
);
7238 __u32 blocks_per_unit
;
7240 if (dev
->vol
.migr_state
&&
7241 dev
->vol
.migr_type
== MIGR_GEN_MIGR
) {
7242 /* array state change is blocked due to reshape action
7244 * - abort the reshape (if last_checkpoint is 0 and action!= reshape)
7245 * - finish the reshape (if last_checkpoint is big and action != reshape)
7246 * - update curr_migr_unit
7248 if (a
->curr_action
== reshape
) {
7249 /* still reshaping, maybe update curr_migr_unit */
7250 goto mark_checkpoint
;
7252 if (a
->last_checkpoint
== 0 && a
->prev_action
== reshape
) {
7253 /* for some reason we aborted the reshape.
7255 * disable automatic metadata rollback
7256 * user action is required to recover process
7259 struct imsm_map
*map2
=
7260 get_imsm_map(dev
, MAP_1
);
7261 dev
->vol
.migr_state
= 0;
7262 set_migr_type(dev
, 0);
7263 dev
->vol
.curr_migr_unit
= 0;
7265 sizeof_imsm_map(map2
));
7266 super
->updates_pending
++;
7269 if (a
->last_checkpoint
>= a
->info
.component_size
) {
7270 unsigned long long array_blocks
;
7274 used_disks
= imsm_num_data_members(dev
, MAP_0
);
7275 if (used_disks
> 0) {
7277 blocks_per_member(map
) *
7279 /* round array size down to closest MB
7281 array_blocks
= (array_blocks
7282 >> SECT_PER_MB_SHIFT
)
7283 << SECT_PER_MB_SHIFT
;
7284 a
->info
.custom_array_size
= array_blocks
;
7285 /* encourage manager to update array
7289 a
->check_reshape
= 1;
7291 /* finalize online capacity expansion/reshape */
7292 for (mdi
= a
->info
.devs
; mdi
; mdi
= mdi
->next
)
7294 mdi
->disk
.raid_disk
,
7297 imsm_progress_container_reshape(super
);
7302 /* before we activate this array handle any missing disks */
7303 if (consistent
== 2)
7304 handle_missing(super
, dev
);
7306 if (consistent
== 2 &&
7307 (!is_resync_complete(&a
->info
) ||
7308 map_state
!= IMSM_T_STATE_NORMAL
||
7309 dev
->vol
.migr_state
))
7312 if (is_resync_complete(&a
->info
)) {
7313 /* complete intialization / resync,
7314 * recovery and interrupted recovery is completed in
7317 if (is_resyncing(dev
)) {
7318 dprintf("imsm: mark resync done\n");
7319 end_migration(dev
, super
, map_state
);
7320 super
->updates_pending
++;
7321 a
->last_checkpoint
= 0;
7323 } else if ((!is_resyncing(dev
) && !failed
) &&
7324 (imsm_reshape_blocks_arrays_changes(super
) == 0)) {
7325 /* mark the start of the init process if nothing is failed */
7326 dprintf("imsm: mark resync start\n");
7327 if (map
->map_state
== IMSM_T_STATE_UNINITIALIZED
)
7328 migrate(dev
, super
, IMSM_T_STATE_NORMAL
, MIGR_INIT
);
7330 migrate(dev
, super
, IMSM_T_STATE_NORMAL
, MIGR_REPAIR
);
7331 super
->updates_pending
++;
7335 /* skip checkpointing for general migration,
7336 * it is controlled in mdadm
7338 if (is_gen_migration(dev
))
7339 goto skip_mark_checkpoint
;
7341 /* check if we can update curr_migr_unit from resync_start, recovery_start */
7342 blocks_per_unit
= blocks_per_migr_unit(super
, dev
);
7343 if (blocks_per_unit
) {
7347 units
= a
->last_checkpoint
/ blocks_per_unit
;
7350 /* check that we did not overflow 32-bits, and that
7351 * curr_migr_unit needs updating
7353 if (units32
== units
&&
7355 __le32_to_cpu(dev
->vol
.curr_migr_unit
) != units32
) {
7356 dprintf("imsm: mark checkpoint (%u)\n", units32
);
7357 dev
->vol
.curr_migr_unit
= __cpu_to_le32(units32
);
7358 super
->updates_pending
++;
7362 skip_mark_checkpoint
:
7363 /* mark dirty / clean */
7364 if (dev
->vol
.dirty
!= !consistent
) {
7365 dprintf("imsm: mark '%s'\n", consistent
? "clean" : "dirty");
7370 super
->updates_pending
++;
7376 static void imsm_set_disk(struct active_array
*a
, int n
, int state
)
7378 int inst
= a
->info
.container_member
;
7379 struct intel_super
*super
= a
->container
->sb
;
7380 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
7381 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
7382 struct imsm_disk
*disk
;
7384 int recovery_not_finished
= 0;
7389 if (n
> map
->num_members
)
7390 pr_err("imsm: set_disk %d out of range 0..%d\n",
7391 n
, map
->num_members
- 1);
7396 dprintf("imsm: set_disk %d:%x\n", n
, state
);
7398 ord
= get_imsm_ord_tbl_ent(dev
, n
, MAP_0
);
7399 disk
= get_imsm_disk(super
, ord_to_idx(ord
));
7401 /* check for new failures */
7402 if (state
& DS_FAULTY
) {
7403 if (mark_failure(dev
, disk
, ord_to_idx(ord
)))
7404 super
->updates_pending
++;
7407 /* check if in_sync */
7408 if (state
& DS_INSYNC
&& ord
& IMSM_ORD_REBUILD
&& is_rebuilding(dev
)) {
7409 struct imsm_map
*migr_map
= get_imsm_map(dev
, MAP_1
);
7411 set_imsm_ord_tbl_ent(migr_map
, n
, ord_to_idx(ord
));
7412 super
->updates_pending
++;
7415 failed
= imsm_count_failed(super
, dev
, MAP_0
);
7416 map_state
= imsm_check_degraded(super
, dev
, failed
, MAP_0
);
7418 /* check if recovery complete, newly degraded, or failed */
7419 dprintf("imsm: Detected transition to state ");
7420 switch (map_state
) {
7421 case IMSM_T_STATE_NORMAL
: /* transition to normal state */
7422 dprintf("normal: ");
7423 if (is_rebuilding(dev
)) {
7424 dprintf_cont("while rebuilding");
7425 /* check if recovery is really finished */
7426 for (mdi
= a
->info
.devs
; mdi
; mdi
= mdi
->next
)
7427 if (mdi
->recovery_start
!= MaxSector
) {
7428 recovery_not_finished
= 1;
7431 if (recovery_not_finished
) {
7433 dprintf("Rebuild has not finished yet, state not changed");
7434 if (a
->last_checkpoint
< mdi
->recovery_start
) {
7435 a
->last_checkpoint
= mdi
->recovery_start
;
7436 super
->updates_pending
++;
7440 end_migration(dev
, super
, map_state
);
7441 map
= get_imsm_map(dev
, MAP_0
);
7442 map
->failed_disk_num
= ~0;
7443 super
->updates_pending
++;
7444 a
->last_checkpoint
= 0;
7447 if (is_gen_migration(dev
)) {
7448 dprintf_cont("while general migration");
7449 if (a
->last_checkpoint
>= a
->info
.component_size
)
7450 end_migration(dev
, super
, map_state
);
7452 map
->map_state
= map_state
;
7453 map
= get_imsm_map(dev
, MAP_0
);
7454 map
->failed_disk_num
= ~0;
7455 super
->updates_pending
++;
7459 case IMSM_T_STATE_DEGRADED
: /* transition to degraded state */
7460 dprintf_cont("degraded: ");
7461 if ((map
->map_state
!= map_state
) &&
7462 !dev
->vol
.migr_state
) {
7463 dprintf_cont("mark degraded");
7464 map
->map_state
= map_state
;
7465 super
->updates_pending
++;
7466 a
->last_checkpoint
= 0;
7469 if (is_rebuilding(dev
)) {
7470 dprintf_cont("while rebuilding.");
7471 if (map
->map_state
!= map_state
) {
7472 dprintf_cont(" Map state change");
7473 end_migration(dev
, super
, map_state
);
7474 super
->updates_pending
++;
7478 if (is_gen_migration(dev
)) {
7479 dprintf_cont("while general migration");
7480 if (a
->last_checkpoint
>= a
->info
.component_size
)
7481 end_migration(dev
, super
, map_state
);
7483 map
->map_state
= map_state
;
7484 manage_second_map(super
, dev
);
7486 super
->updates_pending
++;
7489 if (is_initializing(dev
)) {
7490 dprintf_cont("while initialization.");
7491 map
->map_state
= map_state
;
7492 super
->updates_pending
++;
7496 case IMSM_T_STATE_FAILED
: /* transition to failed state */
7497 dprintf_cont("failed: ");
7498 if (is_gen_migration(dev
)) {
7499 dprintf_cont("while general migration");
7500 map
->map_state
= map_state
;
7501 super
->updates_pending
++;
7504 if (map
->map_state
!= map_state
) {
7505 dprintf_cont("mark failed");
7506 end_migration(dev
, super
, map_state
);
7507 super
->updates_pending
++;
7508 a
->last_checkpoint
= 0;
7513 dprintf_cont("state %i\n", map_state
);
7518 static int store_imsm_mpb(int fd
, struct imsm_super
*mpb
)
7521 __u32 mpb_size
= __le32_to_cpu(mpb
->mpb_size
);
7522 unsigned long long dsize
;
7523 unsigned long long sectors
;
7525 get_dev_size(fd
, NULL
, &dsize
);
7527 if (mpb_size
> 512) {
7528 /* -1 to account for anchor */
7529 sectors
= mpb_sectors(mpb
) - 1;
7531 /* write the extended mpb to the sectors preceeding the anchor */
7532 if (lseek64(fd
, dsize
- (512 * (2 + sectors
)), SEEK_SET
) < 0)
7535 if ((unsigned long long)write(fd
, buf
+ 512, 512 * sectors
)
7540 /* first block is stored on second to last sector of the disk */
7541 if (lseek64(fd
, dsize
- (512 * 2), SEEK_SET
) < 0)
7544 if (write(fd
, buf
, 512) != 512)
7550 static void imsm_sync_metadata(struct supertype
*container
)
7552 struct intel_super
*super
= container
->sb
;
7554 dprintf("sync metadata: %d\n", super
->updates_pending
);
7555 if (!super
->updates_pending
)
7558 write_super_imsm(container
, 0);
7560 super
->updates_pending
= 0;
7563 static struct dl
*imsm_readd(struct intel_super
*super
, int idx
, struct active_array
*a
)
7565 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
7566 int i
= get_imsm_disk_idx(dev
, idx
, MAP_X
);
7569 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
7573 if (dl
&& is_failed(&dl
->disk
))
7577 dprintf("found %x:%x\n", dl
->major
, dl
->minor
);
7582 static struct dl
*imsm_add_spare(struct intel_super
*super
, int slot
,
7583 struct active_array
*a
, int activate_new
,
7584 struct mdinfo
*additional_test_list
)
7586 struct imsm_dev
*dev
= get_imsm_dev(super
, a
->info
.container_member
);
7587 int idx
= get_imsm_disk_idx(dev
, slot
, MAP_X
);
7588 struct imsm_super
*mpb
= super
->anchor
;
7589 struct imsm_map
*map
;
7590 unsigned long long pos
;
7595 __u32 array_start
= 0;
7596 __u32 array_end
= 0;
7598 struct mdinfo
*test_list
;
7600 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
7601 /* If in this array, skip */
7602 for (d
= a
->info
.devs
; d
; d
= d
->next
)
7603 if (d
->state_fd
>= 0 &&
7604 d
->disk
.major
== dl
->major
&&
7605 d
->disk
.minor
== dl
->minor
) {
7606 dprintf("%x:%x already in array\n",
7607 dl
->major
, dl
->minor
);
7612 test_list
= additional_test_list
;
7614 if (test_list
->disk
.major
== dl
->major
&&
7615 test_list
->disk
.minor
== dl
->minor
) {
7616 dprintf("%x:%x already in additional test list\n",
7617 dl
->major
, dl
->minor
);
7620 test_list
= test_list
->next
;
7625 /* skip in use or failed drives */
7626 if (is_failed(&dl
->disk
) || idx
== dl
->index
||
7628 dprintf("%x:%x status (failed: %d index: %d)\n",
7629 dl
->major
, dl
->minor
, is_failed(&dl
->disk
), idx
);
7633 /* skip pure spares when we are looking for partially
7634 * assimilated drives
7636 if (dl
->index
== -1 && !activate_new
)
7639 /* Does this unused device have the requisite free space?
7640 * It needs to be able to cover all member volumes
7642 ex
= get_extents(super
, dl
);
7644 dprintf("cannot get extents\n");
7647 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
7648 dev
= get_imsm_dev(super
, i
);
7649 map
= get_imsm_map(dev
, MAP_0
);
7651 /* check if this disk is already a member of
7654 if (get_imsm_disk_slot(map
, dl
->index
) >= 0)
7660 array_start
= pba_of_lba0(map
);
7661 array_end
= array_start
+
7662 blocks_per_member(map
) - 1;
7665 /* check that we can start at pba_of_lba0 with
7666 * blocks_per_member of space
7668 if (array_start
>= pos
&& array_end
< ex
[j
].start
) {
7672 pos
= ex
[j
].start
+ ex
[j
].size
;
7674 } while (ex
[j
-1].size
);
7681 if (i
< mpb
->num_raid_devs
) {
7682 dprintf("%x:%x does not have %u to %u available\n",
7683 dl
->major
, dl
->minor
, array_start
, array_end
);
7693 static int imsm_rebuild_allowed(struct supertype
*cont
, int dev_idx
, int failed
)
7695 struct imsm_dev
*dev2
;
7696 struct imsm_map
*map
;
7702 dev2
= get_imsm_dev(cont
->sb
, dev_idx
);
7704 state
= imsm_check_degraded(cont
->sb
, dev2
, failed
, MAP_0
);
7705 if (state
== IMSM_T_STATE_FAILED
) {
7706 map
= get_imsm_map(dev2
, MAP_0
);
7709 for (slot
= 0; slot
< map
->num_members
; slot
++) {
7711 * Check if failed disks are deleted from intel
7712 * disk list or are marked to be deleted
7714 idx
= get_imsm_disk_idx(dev2
, slot
, MAP_X
);
7715 idisk
= get_imsm_dl_disk(cont
->sb
, idx
);
7717 * Do not rebuild the array if failed disks
7718 * from failed sub-array are not removed from
7722 is_failed(&idisk
->disk
) &&
7723 (idisk
->action
!= DISK_REMOVE
))
7731 static struct mdinfo
*imsm_activate_spare(struct active_array
*a
,
7732 struct metadata_update
**updates
)
7735 * Find a device with unused free space and use it to replace a
7736 * failed/vacant region in an array. We replace failed regions one a
7737 * array at a time. The result is that a new spare disk will be added
7738 * to the first failed array and after the monitor has finished
7739 * propagating failures the remainder will be consumed.
7741 * FIXME add a capability for mdmon to request spares from another
7745 struct intel_super
*super
= a
->container
->sb
;
7746 int inst
= a
->info
.container_member
;
7747 struct imsm_dev
*dev
= get_imsm_dev(super
, inst
);
7748 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
7749 int failed
= a
->info
.array
.raid_disks
;
7750 struct mdinfo
*rv
= NULL
;
7753 struct metadata_update
*mu
;
7755 struct imsm_update_activate_spare
*u
;
7760 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
7761 if ((d
->curr_state
& DS_FAULTY
) &&
7763 /* wait for Removal to happen */
7765 if (d
->state_fd
>= 0)
7769 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
7770 inst
, failed
, a
->info
.array
.raid_disks
, a
->info
.array
.level
);
7772 if (imsm_reshape_blocks_arrays_changes(super
))
7775 /* Cannot activate another spare if rebuild is in progress already
7777 if (is_rebuilding(dev
)) {
7778 dprintf("imsm: No spare activation allowed. Rebuild in progress already.\n");
7782 if (a
->info
.array
.level
== 4)
7783 /* No repair for takeovered array
7784 * imsm doesn't support raid4
7788 if (imsm_check_degraded(super
, dev
, failed
, MAP_0
) !=
7789 IMSM_T_STATE_DEGRADED
)
7793 * If there are any failed disks check state of the other volume.
7794 * Block rebuild if the another one is failed until failed disks
7795 * are removed from container.
7798 dprintf("found failed disks in %.*s, check if there anotherfailed sub-array.\n",
7799 MAX_RAID_SERIAL_LEN
, dev
->volume
);
7800 /* check if states of the other volumes allow for rebuild */
7801 for (i
= 0; i
< super
->anchor
->num_raid_devs
; i
++) {
7803 allowed
= imsm_rebuild_allowed(a
->container
,
7811 /* For each slot, if it is not working, find a spare */
7812 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
7813 for (d
= a
->info
.devs
; d
; d
= d
->next
)
7814 if (d
->disk
.raid_disk
== i
)
7816 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
7817 if (d
&& (d
->state_fd
>= 0))
7821 * OK, this device needs recovery. Try to re-add the
7822 * previous occupant of this slot, if this fails see if
7823 * we can continue the assimilation of a spare that was
7824 * partially assimilated, finally try to activate a new
7827 dl
= imsm_readd(super
, i
, a
);
7829 dl
= imsm_add_spare(super
, i
, a
, 0, rv
);
7831 dl
= imsm_add_spare(super
, i
, a
, 1, rv
);
7835 /* found a usable disk with enough space */
7836 di
= xcalloc(1, sizeof(*di
));
7838 /* dl->index will be -1 in the case we are activating a
7839 * pristine spare. imsm_process_update() will create a
7840 * new index in this case. Once a disk is found to be
7841 * failed in all member arrays it is kicked from the
7844 di
->disk
.number
= dl
->index
;
7846 /* (ab)use di->devs to store a pointer to the device
7849 di
->devs
= (struct mdinfo
*) dl
;
7851 di
->disk
.raid_disk
= i
;
7852 di
->disk
.major
= dl
->major
;
7853 di
->disk
.minor
= dl
->minor
;
7855 di
->recovery_start
= 0;
7856 di
->data_offset
= pba_of_lba0(map
);
7857 di
->component_size
= a
->info
.component_size
;
7858 di
->container_member
= inst
;
7859 super
->random
= random32();
7863 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
7864 i
, di
->data_offset
);
7868 /* No spares found */
7870 /* Now 'rv' has a list of devices to return.
7871 * Create a metadata_update record to update the
7872 * disk_ord_tbl for the array
7874 mu
= xmalloc(sizeof(*mu
));
7875 mu
->buf
= xcalloc(num_spares
,
7876 sizeof(struct imsm_update_activate_spare
));
7878 mu
->space_list
= NULL
;
7879 mu
->len
= sizeof(struct imsm_update_activate_spare
) * num_spares
;
7880 mu
->next
= *updates
;
7881 u
= (struct imsm_update_activate_spare
*) mu
->buf
;
7883 for (di
= rv
; di
; di
= di
->next
) {
7884 u
->type
= update_activate_spare
;
7885 u
->dl
= (struct dl
*) di
->devs
;
7887 u
->slot
= di
->disk
.raid_disk
;
7898 static int disks_overlap(struct intel_super
*super
, int idx
, struct imsm_update_create_array
*u
)
7900 struct imsm_dev
*dev
= get_imsm_dev(super
, idx
);
7901 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
7902 struct imsm_map
*new_map
= get_imsm_map(&u
->dev
, MAP_0
);
7903 struct disk_info
*inf
= get_disk_info(u
);
7904 struct imsm_disk
*disk
;
7908 for (i
= 0; i
< map
->num_members
; i
++) {
7909 disk
= get_imsm_disk(super
, get_imsm_disk_idx(dev
, i
, MAP_X
));
7910 for (j
= 0; j
< new_map
->num_members
; j
++)
7911 if (serialcmp(disk
->serial
, inf
[j
].serial
) == 0)
7918 static struct dl
*get_disk_super(struct intel_super
*super
, int major
, int minor
)
7922 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
7923 if ((dl
->major
== major
) && (dl
->minor
== minor
))
7928 static int remove_disk_super(struct intel_super
*super
, int major
, int minor
)
7934 for (dl
= super
->disks
; dl
; dl
= dl
->next
) {
7935 if ((dl
->major
== major
) && (dl
->minor
== minor
)) {
7938 prev
->next
= dl
->next
;
7940 super
->disks
= dl
->next
;
7942 __free_imsm_disk(dl
);
7943 dprintf("removed %x:%x\n", major
, minor
);
7951 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, unsigned index
);
7953 static int add_remove_disk_update(struct intel_super
*super
)
7955 int check_degraded
= 0;
7958 /* add/remove some spares to/from the metadata/contrainer */
7959 while (super
->disk_mgmt_list
) {
7960 struct dl
*disk_cfg
;
7962 disk_cfg
= super
->disk_mgmt_list
;
7963 super
->disk_mgmt_list
= disk_cfg
->next
;
7964 disk_cfg
->next
= NULL
;
7966 if (disk_cfg
->action
== DISK_ADD
) {
7967 disk_cfg
->next
= super
->disks
;
7968 super
->disks
= disk_cfg
;
7970 dprintf("added %x:%x\n",
7971 disk_cfg
->major
, disk_cfg
->minor
);
7972 } else if (disk_cfg
->action
== DISK_REMOVE
) {
7973 dprintf("Disk remove action processed: %x.%x\n",
7974 disk_cfg
->major
, disk_cfg
->minor
);
7975 disk
= get_disk_super(super
,
7979 /* store action status */
7980 disk
->action
= DISK_REMOVE
;
7981 /* remove spare disks only */
7982 if (disk
->index
== -1) {
7983 remove_disk_super(super
,
7988 /* release allocate disk structure */
7989 __free_imsm_disk(disk_cfg
);
7992 return check_degraded
;
7995 static int apply_reshape_migration_update(struct imsm_update_reshape_migration
*u
,
7996 struct intel_super
*super
,
7999 struct intel_dev
*id
;
8000 void **tofree
= NULL
;
8003 dprintf("(enter)\n");
8004 if ((u
->subdev
< 0) ||
8006 dprintf("imsm: Error: Wrong subdev: %i\n", u
->subdev
);
8009 if ((space_list
== NULL
) || (*space_list
== NULL
)) {
8010 dprintf("imsm: Error: Memory is not allocated\n");
8014 for (id
= super
->devlist
; id
; id
= id
->next
) {
8015 if (id
->index
== (unsigned)u
->subdev
) {
8016 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->subdev
);
8017 struct imsm_map
*map
;
8018 struct imsm_dev
*new_dev
=
8019 (struct imsm_dev
*)*space_list
;
8020 struct imsm_map
*migr_map
= get_imsm_map(dev
, MAP_1
);
8022 struct dl
*new_disk
;
8024 if (new_dev
== NULL
)
8026 *space_list
= **space_list
;
8027 memcpy(new_dev
, dev
, sizeof_imsm_dev(dev
, 0));
8028 map
= get_imsm_map(new_dev
, MAP_0
);
8030 dprintf("imsm: Error: migration in progress");
8034 to_state
= map
->map_state
;
8035 if ((u
->new_level
== 5) && (map
->raid_level
== 0)) {
8037 /* this should not happen */
8038 if (u
->new_disks
[0] < 0) {
8039 map
->failed_disk_num
=
8040 map
->num_members
- 1;
8041 to_state
= IMSM_T_STATE_DEGRADED
;
8043 to_state
= IMSM_T_STATE_NORMAL
;
8045 migrate(new_dev
, super
, to_state
, MIGR_GEN_MIGR
);
8046 if (u
->new_level
> -1)
8047 map
->raid_level
= u
->new_level
;
8048 migr_map
= get_imsm_map(new_dev
, MAP_1
);
8049 if ((u
->new_level
== 5) &&
8050 (migr_map
->raid_level
== 0)) {
8051 int ord
= map
->num_members
- 1;
8052 migr_map
->num_members
--;
8053 if (u
->new_disks
[0] < 0)
8054 ord
|= IMSM_ORD_REBUILD
;
8055 set_imsm_ord_tbl_ent(map
,
8056 map
->num_members
- 1,
8060 tofree
= (void **)dev
;
8062 /* update chunk size
8064 if (u
->new_chunksize
> 0)
8065 map
->blocks_per_strip
=
8066 __cpu_to_le16(u
->new_chunksize
* 2);
8070 if ((u
->new_level
!= 5) ||
8071 (migr_map
->raid_level
!= 0) ||
8072 (migr_map
->raid_level
== map
->raid_level
))
8075 if (u
->new_disks
[0] >= 0) {
8078 new_disk
= get_disk_super(super
,
8079 major(u
->new_disks
[0]),
8080 minor(u
->new_disks
[0]));
8081 dprintf("imsm: new disk for reshape is: %i:%i (%p, index = %i)\n",
8082 major(u
->new_disks
[0]),
8083 minor(u
->new_disks
[0]),
8084 new_disk
, new_disk
->index
);
8085 if (new_disk
== NULL
)
8086 goto error_disk_add
;
8088 new_disk
->index
= map
->num_members
- 1;
8089 /* slot to fill in autolayout
8091 new_disk
->raiddisk
= new_disk
->index
;
8092 new_disk
->disk
.status
|= CONFIGURED_DISK
;
8093 new_disk
->disk
.status
&= ~SPARE_DISK
;
8095 goto error_disk_add
;
8098 *tofree
= *space_list
;
8099 /* calculate new size
8101 imsm_set_array_size(new_dev
, -1);
8108 *space_list
= tofree
;
8112 dprintf("Error: imsm: Cannot find disk.\n");
8116 static int apply_size_change_update(struct imsm_update_size_change
*u
,
8117 struct intel_super
*super
)
8119 struct intel_dev
*id
;
8122 dprintf("(enter)\n");
8123 if ((u
->subdev
< 0) ||
8125 dprintf("imsm: Error: Wrong subdev: %i\n", u
->subdev
);
8129 for (id
= super
->devlist
; id
; id
= id
->next
) {
8130 if (id
->index
== (unsigned)u
->subdev
) {
8131 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->subdev
);
8132 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
8133 int used_disks
= imsm_num_data_members(dev
, MAP_0
);
8134 unsigned long long blocks_per_member
;
8136 /* calculate new size
8138 blocks_per_member
= u
->new_size
/ used_disks
;
8139 dprintf("(size: %llu, blocks per member: %llu)\n",
8140 u
->new_size
, blocks_per_member
);
8141 set_blocks_per_member(map
, blocks_per_member
);
8142 imsm_set_array_size(dev
, u
->new_size
);
8152 static int apply_update_activate_spare(struct imsm_update_activate_spare
*u
,
8153 struct intel_super
*super
,
8154 struct active_array
*active_array
)
8156 struct imsm_super
*mpb
= super
->anchor
;
8157 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->array
);
8158 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
8159 struct imsm_map
*migr_map
;
8160 struct active_array
*a
;
8161 struct imsm_disk
*disk
;
8168 int second_map_created
= 0;
8170 for (; u
; u
= u
->next
) {
8171 victim
= get_imsm_disk_idx(dev
, u
->slot
, MAP_X
);
8176 for (dl
= super
->disks
; dl
; dl
= dl
->next
)
8181 pr_err("error: imsm_activate_spare passed an unknown disk (index: %d)\n",
8186 /* count failures (excluding rebuilds and the victim)
8187 * to determine map[0] state
8190 for (i
= 0; i
< map
->num_members
; i
++) {
8193 disk
= get_imsm_disk(super
,
8194 get_imsm_disk_idx(dev
, i
, MAP_X
));
8195 if (!disk
|| is_failed(disk
))
8199 /* adding a pristine spare, assign a new index */
8200 if (dl
->index
< 0) {
8201 dl
->index
= super
->anchor
->num_disks
;
8202 super
->anchor
->num_disks
++;
8205 disk
->status
|= CONFIGURED_DISK
;
8206 disk
->status
&= ~SPARE_DISK
;
8209 to_state
= imsm_check_degraded(super
, dev
, failed
, MAP_0
);
8210 if (!second_map_created
) {
8211 second_map_created
= 1;
8212 map
->map_state
= IMSM_T_STATE_DEGRADED
;
8213 migrate(dev
, super
, to_state
, MIGR_REBUILD
);
8215 map
->map_state
= to_state
;
8216 migr_map
= get_imsm_map(dev
, MAP_1
);
8217 set_imsm_ord_tbl_ent(map
, u
->slot
, dl
->index
);
8218 set_imsm_ord_tbl_ent(migr_map
, u
->slot
,
8219 dl
->index
| IMSM_ORD_REBUILD
);
8221 /* update the family_num to mark a new container
8222 * generation, being careful to record the existing
8223 * family_num in orig_family_num to clean up after
8224 * earlier mdadm versions that neglected to set it.
8226 if (mpb
->orig_family_num
== 0)
8227 mpb
->orig_family_num
= mpb
->family_num
;
8228 mpb
->family_num
+= super
->random
;
8230 /* count arrays using the victim in the metadata */
8232 for (a
= active_array
; a
; a
= a
->next
) {
8233 dev
= get_imsm_dev(super
, a
->info
.container_member
);
8234 map
= get_imsm_map(dev
, MAP_0
);
8236 if (get_imsm_disk_slot(map
, victim
) >= 0)
8240 /* delete the victim if it is no longer being
8246 /* We know that 'manager' isn't touching anything,
8247 * so it is safe to delete
8249 for (dlp
= &super
->disks
; *dlp
; dlp
= &(*dlp
)->next
)
8250 if ((*dlp
)->index
== victim
)
8253 /* victim may be on the missing list */
8255 for (dlp
= &super
->missing
; *dlp
;
8256 dlp
= &(*dlp
)->next
)
8257 if ((*dlp
)->index
== victim
)
8259 imsm_delete(super
, dlp
, victim
);
8266 static int apply_reshape_container_disks_update(struct imsm_update_reshape
*u
,
8267 struct intel_super
*super
,
8270 struct dl
*new_disk
;
8271 struct intel_dev
*id
;
8273 int delta_disks
= u
->new_raid_disks
- u
->old_raid_disks
;
8274 int disk_count
= u
->old_raid_disks
;
8275 void **tofree
= NULL
;
8276 int devices_to_reshape
= 1;
8277 struct imsm_super
*mpb
= super
->anchor
;
8279 unsigned int dev_id
;
8281 dprintf("(enter)\n");
8283 /* enable spares to use in array */
8284 for (i
= 0; i
< delta_disks
; i
++) {
8285 new_disk
= get_disk_super(super
,
8286 major(u
->new_disks
[i
]),
8287 minor(u
->new_disks
[i
]));
8288 dprintf("imsm: new disk for reshape is: %i:%i (%p, index = %i)\n",
8289 major(u
->new_disks
[i
]), minor(u
->new_disks
[i
]),
8290 new_disk
, new_disk
->index
);
8291 if ((new_disk
== NULL
) ||
8292 ((new_disk
->index
>= 0) &&
8293 (new_disk
->index
< u
->old_raid_disks
)))
8294 goto update_reshape_exit
;
8295 new_disk
->index
= disk_count
++;
8296 /* slot to fill in autolayout
8298 new_disk
->raiddisk
= new_disk
->index
;
8299 new_disk
->disk
.status
|=
8301 new_disk
->disk
.status
&= ~SPARE_DISK
;
8304 dprintf("imsm: volume set mpb->num_raid_devs = %i\n",
8305 mpb
->num_raid_devs
);
8306 /* manage changes in volume
8308 for (dev_id
= 0; dev_id
< mpb
->num_raid_devs
; dev_id
++) {
8309 void **sp
= *space_list
;
8310 struct imsm_dev
*newdev
;
8311 struct imsm_map
*newmap
, *oldmap
;
8313 for (id
= super
->devlist
; id
; id
= id
->next
) {
8314 if (id
->index
== dev_id
)
8323 /* Copy the dev, but not (all of) the map */
8324 memcpy(newdev
, id
->dev
, sizeof(*newdev
));
8325 oldmap
= get_imsm_map(id
->dev
, MAP_0
);
8326 newmap
= get_imsm_map(newdev
, MAP_0
);
8327 /* Copy the current map */
8328 memcpy(newmap
, oldmap
, sizeof_imsm_map(oldmap
));
8329 /* update one device only
8331 if (devices_to_reshape
) {
8332 dprintf("imsm: modifying subdev: %i\n",
8334 devices_to_reshape
--;
8335 newdev
->vol
.migr_state
= 1;
8336 newdev
->vol
.curr_migr_unit
= 0;
8337 set_migr_type(newdev
, MIGR_GEN_MIGR
);
8338 newmap
->num_members
= u
->new_raid_disks
;
8339 for (i
= 0; i
< delta_disks
; i
++) {
8340 set_imsm_ord_tbl_ent(newmap
,
8341 u
->old_raid_disks
+ i
,
8342 u
->old_raid_disks
+ i
);
8344 /* New map is correct, now need to save old map
8346 newmap
= get_imsm_map(newdev
, MAP_1
);
8347 memcpy(newmap
, oldmap
, sizeof_imsm_map(oldmap
));
8349 imsm_set_array_size(newdev
, -1);
8352 sp
= (void **)id
->dev
;
8357 /* Clear migration record */
8358 memset(super
->migr_rec
, 0, sizeof(struct migr_record
));
8361 *space_list
= tofree
;
8364 update_reshape_exit
:
8369 static int apply_takeover_update(struct imsm_update_takeover
*u
,
8370 struct intel_super
*super
,
8373 struct imsm_dev
*dev
= NULL
;
8374 struct intel_dev
*dv
;
8375 struct imsm_dev
*dev_new
;
8376 struct imsm_map
*map
;
8380 for (dv
= super
->devlist
; dv
; dv
= dv
->next
)
8381 if (dv
->index
== (unsigned int)u
->subarray
) {
8389 map
= get_imsm_map(dev
, MAP_0
);
8391 if (u
->direction
== R10_TO_R0
) {
8392 /* Number of failed disks must be half of initial disk number */
8393 if (imsm_count_failed(super
, dev
, MAP_0
) !=
8394 (map
->num_members
/ 2))
8397 /* iterate through devices to mark removed disks as spare */
8398 for (dm
= super
->disks
; dm
; dm
= dm
->next
) {
8399 if (dm
->disk
.status
& FAILED_DISK
) {
8400 int idx
= dm
->index
;
8401 /* update indexes on the disk list */
8402 /* FIXME this loop-with-the-loop looks wrong, I'm not convinced
8403 the index values will end up being correct.... NB */
8404 for (du
= super
->disks
; du
; du
= du
->next
)
8405 if (du
->index
> idx
)
8407 /* mark as spare disk */
8412 map
->num_members
= map
->num_members
/ 2;
8413 map
->map_state
= IMSM_T_STATE_NORMAL
;
8414 map
->num_domains
= 1;
8415 map
->raid_level
= 0;
8416 map
->failed_disk_num
= -1;
8419 if (u
->direction
== R0_TO_R10
) {
8421 /* update slots in current disk list */
8422 for (dm
= super
->disks
; dm
; dm
= dm
->next
) {
8426 /* create new *missing* disks */
8427 for (i
= 0; i
< map
->num_members
; i
++) {
8428 space
= *space_list
;
8431 *space_list
= *space
;
8433 memcpy(du
, super
->disks
, sizeof(*du
));
8437 du
->index
= (i
* 2) + 1;
8438 sprintf((char *)du
->disk
.serial
,
8439 " MISSING_%d", du
->index
);
8440 sprintf((char *)du
->serial
,
8441 "MISSING_%d", du
->index
);
8442 du
->next
= super
->missing
;
8443 super
->missing
= du
;
8445 /* create new dev and map */
8446 space
= *space_list
;
8449 *space_list
= *space
;
8450 dev_new
= (void *)space
;
8451 memcpy(dev_new
, dev
, sizeof(*dev
));
8452 /* update new map */
8453 map
= get_imsm_map(dev_new
, MAP_0
);
8454 map
->num_members
= map
->num_members
* 2;
8455 map
->map_state
= IMSM_T_STATE_DEGRADED
;
8456 map
->num_domains
= 2;
8457 map
->raid_level
= 1;
8458 /* replace dev<->dev_new */
8461 /* update disk order table */
8462 for (du
= super
->disks
; du
; du
= du
->next
)
8464 set_imsm_ord_tbl_ent(map
, du
->index
, du
->index
);
8465 for (du
= super
->missing
; du
; du
= du
->next
)
8466 if (du
->index
>= 0) {
8467 set_imsm_ord_tbl_ent(map
, du
->index
, du
->index
);
8468 mark_missing(dv
->dev
, &du
->disk
, du
->index
);
8474 static void imsm_process_update(struct supertype
*st
,
8475 struct metadata_update
*update
)
8478 * crack open the metadata_update envelope to find the update record
8479 * update can be one of:
8480 * update_reshape_container_disks - all the arrays in the container
8481 * are being reshaped to have more devices. We need to mark
8482 * the arrays for general migration and convert selected spares
8483 * into active devices.
8484 * update_activate_spare - a spare device has replaced a failed
8485 * device in an array, update the disk_ord_tbl. If this disk is
8486 * present in all member arrays then also clear the SPARE_DISK
8488 * update_create_array
8490 * update_rename_array
8491 * update_add_remove_disk
8493 struct intel_super
*super
= st
->sb
;
8494 struct imsm_super
*mpb
;
8495 enum imsm_update_type type
= *(enum imsm_update_type
*) update
->buf
;
8497 /* update requires a larger buf but the allocation failed */
8498 if (super
->next_len
&& !super
->next_buf
) {
8499 super
->next_len
= 0;
8503 if (super
->next_buf
) {
8504 memcpy(super
->next_buf
, super
->buf
, super
->len
);
8506 super
->len
= super
->next_len
;
8507 super
->buf
= super
->next_buf
;
8509 super
->next_len
= 0;
8510 super
->next_buf
= NULL
;
8513 mpb
= super
->anchor
;
8516 case update_general_migration_checkpoint
: {
8517 struct intel_dev
*id
;
8518 struct imsm_update_general_migration_checkpoint
*u
=
8519 (void *)update
->buf
;
8521 dprintf("called for update_general_migration_checkpoint\n");
8523 /* find device under general migration */
8524 for (id
= super
->devlist
; id
; id
= id
->next
) {
8525 if (is_gen_migration(id
->dev
)) {
8526 id
->dev
->vol
.curr_migr_unit
=
8527 __cpu_to_le32(u
->curr_migr_unit
);
8528 super
->updates_pending
++;
8533 case update_takeover
: {
8534 struct imsm_update_takeover
*u
= (void *)update
->buf
;
8535 if (apply_takeover_update(u
, super
, &update
->space_list
)) {
8536 imsm_update_version_info(super
);
8537 super
->updates_pending
++;
8542 case update_reshape_container_disks
: {
8543 struct imsm_update_reshape
*u
= (void *)update
->buf
;
8544 if (apply_reshape_container_disks_update(
8545 u
, super
, &update
->space_list
))
8546 super
->updates_pending
++;
8549 case update_reshape_migration
: {
8550 struct imsm_update_reshape_migration
*u
= (void *)update
->buf
;
8551 if (apply_reshape_migration_update(
8552 u
, super
, &update
->space_list
))
8553 super
->updates_pending
++;
8556 case update_size_change
: {
8557 struct imsm_update_size_change
*u
= (void *)update
->buf
;
8558 if (apply_size_change_update(u
, super
))
8559 super
->updates_pending
++;
8562 case update_activate_spare
: {
8563 struct imsm_update_activate_spare
*u
= (void *) update
->buf
;
8564 if (apply_update_activate_spare(u
, super
, st
->arrays
))
8565 super
->updates_pending
++;
8568 case update_create_array
: {
8569 /* someone wants to create a new array, we need to be aware of
8570 * a few races/collisions:
8571 * 1/ 'Create' called by two separate instances of mdadm
8572 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
8573 * devices that have since been assimilated via
8575 * In the event this update can not be carried out mdadm will
8576 * (FIX ME) notice that its update did not take hold.
8578 struct imsm_update_create_array
*u
= (void *) update
->buf
;
8579 struct intel_dev
*dv
;
8580 struct imsm_dev
*dev
;
8581 struct imsm_map
*map
, *new_map
;
8582 unsigned long long start
, end
;
8583 unsigned long long new_start
, new_end
;
8585 struct disk_info
*inf
;
8588 /* handle racing creates: first come first serve */
8589 if (u
->dev_idx
< mpb
->num_raid_devs
) {
8590 dprintf("subarray %d already defined\n", u
->dev_idx
);
8594 /* check update is next in sequence */
8595 if (u
->dev_idx
!= mpb
->num_raid_devs
) {
8596 dprintf("can not create array %d expected index %d\n",
8597 u
->dev_idx
, mpb
->num_raid_devs
);
8601 new_map
= get_imsm_map(&u
->dev
, MAP_0
);
8602 new_start
= pba_of_lba0(new_map
);
8603 new_end
= new_start
+ blocks_per_member(new_map
);
8604 inf
= get_disk_info(u
);
8606 /* handle activate_spare versus create race:
8607 * check to make sure that overlapping arrays do not include
8610 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
8611 dev
= get_imsm_dev(super
, i
);
8612 map
= get_imsm_map(dev
, MAP_0
);
8613 start
= pba_of_lba0(map
);
8614 end
= start
+ blocks_per_member(map
);
8615 if ((new_start
>= start
&& new_start
<= end
) ||
8616 (start
>= new_start
&& start
<= new_end
))
8621 if (disks_overlap(super
, i
, u
)) {
8622 dprintf("arrays overlap\n");
8627 /* check that prepare update was successful */
8628 if (!update
->space
) {
8629 dprintf("prepare update failed\n");
8633 /* check that all disks are still active before committing
8634 * changes. FIXME: could we instead handle this by creating a
8635 * degraded array? That's probably not what the user expects,
8636 * so better to drop this update on the floor.
8638 for (i
= 0; i
< new_map
->num_members
; i
++) {
8639 dl
= serial_to_dl(inf
[i
].serial
, super
);
8641 dprintf("disk disappeared\n");
8646 super
->updates_pending
++;
8648 /* convert spares to members and fixup ord_tbl */
8649 for (i
= 0; i
< new_map
->num_members
; i
++) {
8650 dl
= serial_to_dl(inf
[i
].serial
, super
);
8651 if (dl
->index
== -1) {
8652 dl
->index
= mpb
->num_disks
;
8654 dl
->disk
.status
|= CONFIGURED_DISK
;
8655 dl
->disk
.status
&= ~SPARE_DISK
;
8657 set_imsm_ord_tbl_ent(new_map
, i
, dl
->index
);
8662 update
->space
= NULL
;
8663 imsm_copy_dev(dev
, &u
->dev
);
8664 dv
->index
= u
->dev_idx
;
8665 dv
->next
= super
->devlist
;
8666 super
->devlist
= dv
;
8667 mpb
->num_raid_devs
++;
8669 imsm_update_version_info(super
);
8672 /* mdmon knows how to release update->space, but not
8673 * ((struct intel_dev *) update->space)->dev
8675 if (update
->space
) {
8681 case update_kill_array
: {
8682 struct imsm_update_kill_array
*u
= (void *) update
->buf
;
8683 int victim
= u
->dev_idx
;
8684 struct active_array
*a
;
8685 struct intel_dev
**dp
;
8686 struct imsm_dev
*dev
;
8688 /* sanity check that we are not affecting the uuid of
8689 * active arrays, or deleting an active array
8691 * FIXME when immutable ids are available, but note that
8692 * we'll also need to fixup the invalidated/active
8693 * subarray indexes in mdstat
8695 for (a
= st
->arrays
; a
; a
= a
->next
)
8696 if (a
->info
.container_member
>= victim
)
8698 /* by definition if mdmon is running at least one array
8699 * is active in the container, so checking
8700 * mpb->num_raid_devs is just extra paranoia
8702 dev
= get_imsm_dev(super
, victim
);
8703 if (a
|| !dev
|| mpb
->num_raid_devs
== 1) {
8704 dprintf("failed to delete subarray-%d\n", victim
);
8708 for (dp
= &super
->devlist
; *dp
;)
8709 if ((*dp
)->index
== (unsigned)super
->current_vol
) {
8712 if ((*dp
)->index
> (unsigned)victim
)
8716 mpb
->num_raid_devs
--;
8717 super
->updates_pending
++;
8720 case update_rename_array
: {
8721 struct imsm_update_rename_array
*u
= (void *) update
->buf
;
8722 char name
[MAX_RAID_SERIAL_LEN
+1];
8723 int target
= u
->dev_idx
;
8724 struct active_array
*a
;
8725 struct imsm_dev
*dev
;
8727 /* sanity check that we are not affecting the uuid of
8730 snprintf(name
, MAX_RAID_SERIAL_LEN
, "%s", (char *) u
->name
);
8731 name
[MAX_RAID_SERIAL_LEN
] = '\0';
8732 for (a
= st
->arrays
; a
; a
= a
->next
)
8733 if (a
->info
.container_member
== target
)
8735 dev
= get_imsm_dev(super
, u
->dev_idx
);
8736 if (a
|| !dev
|| !check_name(super
, name
, 1)) {
8737 dprintf("failed to rename subarray-%d\n", target
);
8741 snprintf((char *) dev
->volume
, MAX_RAID_SERIAL_LEN
, "%s", name
);
8742 super
->updates_pending
++;
8745 case update_add_remove_disk
: {
8746 /* we may be able to repair some arrays if disks are
8747 * being added, check the status of add_remove_disk
8748 * if discs has been added.
8750 if (add_remove_disk_update(super
)) {
8751 struct active_array
*a
;
8753 super
->updates_pending
++;
8754 for (a
= st
->arrays
; a
; a
= a
->next
)
8755 a
->check_degraded
= 1;
8760 pr_err("error: unsuported process update type:(type: %d)\n", type
);
8764 static struct mdinfo
*get_spares_for_grow(struct supertype
*st
);
8766 static int imsm_prepare_update(struct supertype
*st
,
8767 struct metadata_update
*update
)
8770 * Allocate space to hold new disk entries, raid-device entries or a new
8771 * mpb if necessary. The manager synchronously waits for updates to
8772 * complete in the monitor, so new mpb buffers allocated here can be
8773 * integrated by the monitor thread without worrying about live pointers
8774 * in the manager thread.
8776 enum imsm_update_type type
;
8777 struct intel_super
*super
= st
->sb
;
8778 struct imsm_super
*mpb
= super
->anchor
;
8782 if (update
->len
< (int)sizeof(type
))
8785 type
= *(enum imsm_update_type
*) update
->buf
;
8788 case update_general_migration_checkpoint
:
8789 if (update
->len
< (int)sizeof(struct imsm_update_general_migration_checkpoint
))
8791 dprintf("called for update_general_migration_checkpoint\n");
8793 case update_takeover
: {
8794 struct imsm_update_takeover
*u
= (void *)update
->buf
;
8795 if (update
->len
< (int)sizeof(*u
))
8797 if (u
->direction
== R0_TO_R10
) {
8798 void **tail
= (void **)&update
->space_list
;
8799 struct imsm_dev
*dev
= get_imsm_dev(super
, u
->subarray
);
8800 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
8801 int num_members
= map
->num_members
;
8804 /* allocate memory for added disks */
8805 for (i
= 0; i
< num_members
; i
++) {
8806 size
= sizeof(struct dl
);
8807 space
= xmalloc(size
);
8812 /* allocate memory for new device */
8813 size
= sizeof_imsm_dev(super
->devlist
->dev
, 0) +
8814 (num_members
* sizeof(__u32
));
8815 space
= xmalloc(size
);
8819 len
= disks_to_mpb_size(num_members
* 2);
8824 case update_reshape_container_disks
: {
8825 /* Every raid device in the container is about to
8826 * gain some more devices, and we will enter a
8828 * So each 'imsm_map' will be bigger, and the imsm_vol
8829 * will now hold 2 of them.
8830 * Thus we need new 'struct imsm_dev' allocations sized
8831 * as sizeof_imsm_dev but with more devices in both maps.
8833 struct imsm_update_reshape
*u
= (void *)update
->buf
;
8834 struct intel_dev
*dl
;
8835 void **space_tail
= (void**)&update
->space_list
;
8837 if (update
->len
< (int)sizeof(*u
))
8840 dprintf("for update_reshape\n");
8842 for (dl
= super
->devlist
; dl
; dl
= dl
->next
) {
8843 int size
= sizeof_imsm_dev(dl
->dev
, 1);
8845 if (u
->new_raid_disks
> u
->old_raid_disks
)
8846 size
+= sizeof(__u32
)*2*
8847 (u
->new_raid_disks
- u
->old_raid_disks
);
8854 len
= disks_to_mpb_size(u
->new_raid_disks
);
8855 dprintf("New anchor length is %llu\n", (unsigned long long)len
);
8858 case update_reshape_migration
: {
8859 /* for migration level 0->5 we need to add disks
8860 * so the same as for container operation we will copy
8861 * device to the bigger location.
8862 * in memory prepared device and new disk area are prepared
8863 * for usage in process update
8865 struct imsm_update_reshape_migration
*u
= (void *)update
->buf
;
8866 struct intel_dev
*id
;
8867 void **space_tail
= (void **)&update
->space_list
;
8870 int current_level
= -1;
8872 if (update
->len
< (int)sizeof(*u
))
8875 dprintf("for update_reshape\n");
8877 /* add space for bigger array in update
8879 for (id
= super
->devlist
; id
; id
= id
->next
) {
8880 if (id
->index
== (unsigned)u
->subdev
) {
8881 size
= sizeof_imsm_dev(id
->dev
, 1);
8882 if (u
->new_raid_disks
> u
->old_raid_disks
)
8883 size
+= sizeof(__u32
)*2*
8884 (u
->new_raid_disks
- u
->old_raid_disks
);
8892 if (update
->space_list
== NULL
)
8895 /* add space for disk in update
8897 size
= sizeof(struct dl
);
8903 /* add spare device to update
8905 for (id
= super
->devlist
; id
; id
= id
->next
)
8906 if (id
->index
== (unsigned)u
->subdev
) {
8907 struct imsm_dev
*dev
;
8908 struct imsm_map
*map
;
8910 dev
= get_imsm_dev(super
, u
->subdev
);
8911 map
= get_imsm_map(dev
, MAP_0
);
8912 current_level
= map
->raid_level
;
8915 if ((u
->new_level
== 5) && (u
->new_level
!= current_level
)) {
8916 struct mdinfo
*spares
;
8918 spares
= get_spares_for_grow(st
);
8926 makedev(dev
->disk
.major
,
8928 dl
= get_disk_super(super
,
8931 dl
->index
= u
->old_raid_disks
;
8937 len
= disks_to_mpb_size(u
->new_raid_disks
);
8938 dprintf("New anchor length is %llu\n", (unsigned long long)len
);
8941 case update_size_change
: {
8942 if (update
->len
< (int)sizeof(struct imsm_update_size_change
))
8946 case update_activate_spare
: {
8947 if (update
->len
< (int)sizeof(struct imsm_update_activate_spare
))
8951 case update_create_array
: {
8952 struct imsm_update_create_array
*u
= (void *) update
->buf
;
8953 struct intel_dev
*dv
;
8954 struct imsm_dev
*dev
= &u
->dev
;
8955 struct imsm_map
*map
= get_imsm_map(dev
, MAP_0
);
8957 struct disk_info
*inf
;
8961 if (update
->len
< (int)sizeof(*u
))
8964 inf
= get_disk_info(u
);
8965 len
= sizeof_imsm_dev(dev
, 1);
8966 /* allocate a new super->devlist entry */
8967 dv
= xmalloc(sizeof(*dv
));
8968 dv
->dev
= xmalloc(len
);
8971 /* count how many spares will be converted to members */
8972 for (i
= 0; i
< map
->num_members
; i
++) {
8973 dl
= serial_to_dl(inf
[i
].serial
, super
);
8975 /* hmm maybe it failed?, nothing we can do about
8980 if (count_memberships(dl
, super
) == 0)
8983 len
+= activate
* sizeof(struct imsm_disk
);
8986 case update_kill_array
: {
8987 if (update
->len
< (int)sizeof(struct imsm_update_kill_array
))
8991 case update_rename_array
: {
8992 if (update
->len
< (int)sizeof(struct imsm_update_rename_array
))
8996 case update_add_remove_disk
:
8997 /* no update->len needed */
9003 /* check if we need a larger metadata buffer */
9004 if (super
->next_buf
)
9005 buf_len
= super
->next_len
;
9007 buf_len
= super
->len
;
9009 if (__le32_to_cpu(mpb
->mpb_size
) + len
> buf_len
) {
9010 /* ok we need a larger buf than what is currently allocated
9011 * if this allocation fails process_update will notice that
9012 * ->next_len is set and ->next_buf is NULL
9014 buf_len
= ROUND_UP(__le32_to_cpu(mpb
->mpb_size
) + len
, 512);
9015 if (super
->next_buf
)
9016 free(super
->next_buf
);
9018 super
->next_len
= buf_len
;
9019 if (posix_memalign(&super
->next_buf
, 512, buf_len
) == 0)
9020 memset(super
->next_buf
, 0, buf_len
);
9022 super
->next_buf
= NULL
;
9027 /* must be called while manager is quiesced */
9028 static void imsm_delete(struct intel_super
*super
, struct dl
**dlp
, unsigned index
)
9030 struct imsm_super
*mpb
= super
->anchor
;
9032 struct imsm_dev
*dev
;
9033 struct imsm_map
*map
;
9034 int i
, j
, num_members
;
9037 dprintf("deleting device[%d] from imsm_super\n", index
);
9039 /* shift all indexes down one */
9040 for (iter
= super
->disks
; iter
; iter
= iter
->next
)
9041 if (iter
->index
> (int)index
)
9043 for (iter
= super
->missing
; iter
; iter
= iter
->next
)
9044 if (iter
->index
> (int)index
)
9047 for (i
= 0; i
< mpb
->num_raid_devs
; i
++) {
9048 dev
= get_imsm_dev(super
, i
);
9049 map
= get_imsm_map(dev
, MAP_0
);
9050 num_members
= map
->num_members
;
9051 for (j
= 0; j
< num_members
; j
++) {
9052 /* update ord entries being careful not to propagate
9053 * ord-flags to the first map
9055 ord
= get_imsm_ord_tbl_ent(dev
, j
, MAP_X
);
9057 if (ord_to_idx(ord
) <= index
)
9060 map
= get_imsm_map(dev
, MAP_0
);
9061 set_imsm_ord_tbl_ent(map
, j
, ord_to_idx(ord
- 1));
9062 map
= get_imsm_map(dev
, MAP_1
);
9064 set_imsm_ord_tbl_ent(map
, j
, ord
- 1);
9069 super
->updates_pending
++;
9071 struct dl
*dl
= *dlp
;
9073 *dlp
= (*dlp
)->next
;
9074 __free_imsm_disk(dl
);
9077 #endif /* MDASSEMBLE */
9079 static void close_targets(int *targets
, int new_disks
)
9086 for (i
= 0; i
< new_disks
; i
++) {
9087 if (targets
[i
] >= 0) {
9094 static int imsm_get_allowed_degradation(int level
, int raid_disks
,
9095 struct intel_super
*super
,
9096 struct imsm_dev
*dev
)
9102 struct imsm_map
*map
;
9105 ret_val
= raid_disks
/2;
9106 /* check map if all disks pairs not failed
9109 map
= get_imsm_map(dev
, MAP_0
);
9110 for (i
= 0; i
< ret_val
; i
++) {
9111 int degradation
= 0;
9112 if (get_imsm_disk(super
, i
) == NULL
)
9114 if (get_imsm_disk(super
, i
+ 1) == NULL
)
9116 if (degradation
== 2)
9119 map
= get_imsm_map(dev
, MAP_1
);
9120 /* if there is no second map
9121 * result can be returned
9125 /* check degradation in second map
9127 for (i
= 0; i
< ret_val
; i
++) {
9128 int degradation
= 0;
9129 if (get_imsm_disk(super
, i
) == NULL
)
9131 if (get_imsm_disk(super
, i
+ 1) == NULL
)
9133 if (degradation
== 2)
9147 /*******************************************************************************
9148 * Function: open_backup_targets
9149 * Description: Function opens file descriptors for all devices given in
9152 * info : general array info
9153 * raid_disks : number of disks
9154 * raid_fds : table of device's file descriptors
9155 * super : intel super for raid10 degradation check
9156 * dev : intel device for raid10 degradation check
9160 ******************************************************************************/
9161 int open_backup_targets(struct mdinfo
*info
, int raid_disks
, int *raid_fds
,
9162 struct intel_super
*super
, struct imsm_dev
*dev
)
9168 for (i
= 0; i
< raid_disks
; i
++)
9171 for (sd
= info
->devs
; sd
; sd
= sd
->next
) {
9174 if (sd
->disk
.state
& (1<<MD_DISK_FAULTY
)) {
9175 dprintf("disk is faulty!!\n");
9179 if ((sd
->disk
.raid_disk
>= raid_disks
) ||
9180 (sd
->disk
.raid_disk
< 0))
9183 dn
= map_dev(sd
->disk
.major
,
9185 raid_fds
[sd
->disk
.raid_disk
] = dev_open(dn
, O_RDWR
);
9186 if (raid_fds
[sd
->disk
.raid_disk
] < 0) {
9187 pr_err("cannot open component\n");
9192 /* check if maximum array degradation level is not exceeded
9194 if ((raid_disks
- opened
) >
9195 imsm_get_allowed_degradation(info
->new_level
,
9198 pr_err("Not enough disks can be opened.\n");
9199 close_targets(raid_fds
, raid_disks
);
9205 /*******************************************************************************
9206 * Function: validate_container_imsm
9207 * Description: This routine validates container after assemble,
9208 * eg. if devices in container are under the same controller.
9211 * info : linked list with info about devices used in array
9215 ******************************************************************************/
9216 int validate_container_imsm(struct mdinfo
*info
)
9218 if (check_env("IMSM_NO_PLATFORM"))
9221 struct sys_dev
*idev
;
9222 struct sys_dev
*hba
= NULL
;
9223 struct sys_dev
*intel_devices
= find_intel_devices();
9224 char *dev_path
= devt_to_devpath(makedev(info
->disk
.major
,
9227 for (idev
= intel_devices
; idev
; idev
= idev
->next
) {
9228 if (dev_path
&& strstr(dev_path
, idev
->path
)) {
9237 pr_err("WARNING - Cannot detect HBA for device %s!\n",
9238 devid2kname(makedev(info
->disk
.major
, info
->disk
.minor
)));
9242 const struct imsm_orom
*orom
= get_orom_by_device_id(hba
->dev_id
);
9245 for (dev
= info
->next
; dev
; dev
= dev
->next
) {
9246 dev_path
= devt_to_devpath(makedev(dev
->disk
.major
, dev
->disk
.minor
));
9248 struct sys_dev
*hba2
= NULL
;
9249 for (idev
= intel_devices
; idev
; idev
= idev
->next
) {
9250 if (dev_path
&& strstr(dev_path
, idev
->path
)) {
9258 const struct imsm_orom
*orom2
= hba2
== NULL
? NULL
:
9259 get_orom_by_device_id(hba2
->dev_id
);
9261 if (hba2
&& hba
->type
!= hba2
->type
) {
9262 pr_err("WARNING - HBAs of devices do not match %s != %s\n",
9263 get_sys_dev_type(hba
->type
), get_sys_dev_type(hba2
->type
));
9267 if ((orom
!= orom2
) || ((hba
->type
== SYS_DEV_VMD
) && (hba
!= hba2
))) {
9268 pr_err("WARNING - IMSM container assembled with disks under different HBAs!\n"
9269 " This operation is not supported and can lead to data loss.\n");
9274 pr_err("WARNING - IMSM container assembled with disks under HBAs without IMSM platform support!\n"
9275 " This operation is not supported and can lead to data loss.\n");
9283 /*******************************************************************************
9284 * Function: init_migr_record_imsm
9285 * Description: Function inits imsm migration record
9287 * super : imsm internal array info
9288 * dev : device under migration
9289 * info : general array info to find the smallest device
9292 ******************************************************************************/
9293 void init_migr_record_imsm(struct supertype
*st
, struct imsm_dev
*dev
,
9294 struct mdinfo
*info
)
9296 struct intel_super
*super
= st
->sb
;
9297 struct migr_record
*migr_rec
= super
->migr_rec
;
9299 unsigned long long dsize
, dev_sectors
;
9300 long long unsigned min_dev_sectors
= -1LLU;
9304 struct imsm_map
*map_dest
= get_imsm_map(dev
, MAP_0
);
9305 struct imsm_map
*map_src
= get_imsm_map(dev
, MAP_1
);
9306 unsigned long long num_migr_units
;
9307 unsigned long long array_blocks
;
9309 memset(migr_rec
, 0, sizeof(struct migr_record
));
9310 migr_rec
->family_num
= __cpu_to_le32(super
->anchor
->family_num
);
9312 /* only ascending reshape supported now */
9313 migr_rec
->ascending_migr
= __cpu_to_le32(1);
9315 migr_rec
->dest_depth_per_unit
= GEN_MIGR_AREA_SIZE
/
9316 max(map_dest
->blocks_per_strip
, map_src
->blocks_per_strip
);
9317 migr_rec
->dest_depth_per_unit
*=
9318 max(map_dest
->blocks_per_strip
, map_src
->blocks_per_strip
);
9319 new_data_disks
= imsm_num_data_members(dev
, MAP_0
);
9320 migr_rec
->blocks_per_unit
=
9321 __cpu_to_le32(migr_rec
->dest_depth_per_unit
* new_data_disks
);
9322 migr_rec
->dest_depth_per_unit
=
9323 __cpu_to_le32(migr_rec
->dest_depth_per_unit
);
9324 array_blocks
= info
->component_size
* new_data_disks
;
9326 array_blocks
/ __le32_to_cpu(migr_rec
->blocks_per_unit
);
9328 if (array_blocks
% __le32_to_cpu(migr_rec
->blocks_per_unit
))
9330 migr_rec
->num_migr_units
= __cpu_to_le32(num_migr_units
);
9332 migr_rec
->post_migr_vol_cap
= dev
->size_low
;
9333 migr_rec
->post_migr_vol_cap_hi
= dev
->size_high
;
9335 /* Find the smallest dev */
9336 for (sd
= info
->devs
; sd
; sd
= sd
->next
) {
9337 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
9338 fd
= dev_open(nm
, O_RDONLY
);
9341 get_dev_size(fd
, NULL
, &dsize
);
9342 dev_sectors
= dsize
/ 512;
9343 if (dev_sectors
< min_dev_sectors
)
9344 min_dev_sectors
= dev_sectors
;
9347 migr_rec
->ckpt_area_pba
= __cpu_to_le32(min_dev_sectors
-
9348 RAID_DISK_RESERVED_BLOCKS_IMSM_HI
);
9350 write_imsm_migr_rec(st
);
9355 /*******************************************************************************
9356 * Function: save_backup_imsm
9357 * Description: Function saves critical data stripes to Migration Copy Area
9358 * and updates the current migration unit status.
9359 * Use restore_stripes() to form a destination stripe,
9360 * and to write it to the Copy Area.
9362 * st : supertype information
9363 * dev : imsm device that backup is saved for
9364 * info : general array info
9365 * buf : input buffer
9366 * length : length of data to backup (blocks_per_unit)
9370 ******************************************************************************/
9371 int save_backup_imsm(struct supertype
*st
,
9372 struct imsm_dev
*dev
,
9373 struct mdinfo
*info
,
9378 struct intel_super
*super
= st
->sb
;
9379 unsigned long long *target_offsets
;
9382 struct imsm_map
*map_dest
= get_imsm_map(dev
, MAP_0
);
9383 int new_disks
= map_dest
->num_members
;
9384 int dest_layout
= 0;
9386 unsigned long long start
;
9387 int data_disks
= imsm_num_data_members(dev
, MAP_0
);
9389 targets
= xmalloc(new_disks
* sizeof(int));
9391 for (i
= 0; i
< new_disks
; i
++)
9394 target_offsets
= xcalloc(new_disks
, sizeof(unsigned long long));
9396 start
= info
->reshape_progress
* 512;
9397 for (i
= 0; i
< new_disks
; i
++) {
9398 target_offsets
[i
] = (unsigned long long)
9399 __le32_to_cpu(super
->migr_rec
->ckpt_area_pba
) * 512;
9400 /* move back copy area adderss, it will be moved forward
9401 * in restore_stripes() using start input variable
9403 target_offsets
[i
] -= start
/data_disks
;
9406 if (open_backup_targets(info
, new_disks
, targets
,
9410 dest_layout
= imsm_level_to_layout(map_dest
->raid_level
);
9411 dest_chunk
= __le16_to_cpu(map_dest
->blocks_per_strip
) * 512;
9413 if (restore_stripes(targets
, /* list of dest devices */
9414 target_offsets
, /* migration record offsets */
9417 map_dest
->raid_level
,
9419 -1, /* source backup file descriptor */
9420 0, /* input buf offset
9421 * always 0 buf is already offseted */
9425 pr_err("Error restoring stripes\n");
9433 close_targets(targets
, new_disks
);
9436 free(target_offsets
);
9441 /*******************************************************************************
9442 * Function: save_checkpoint_imsm
9443 * Description: Function called for current unit status update
9444 * in the migration record. It writes it to disk.
9446 * super : imsm internal array info
9447 * info : general array info
9451 * 2: failure, means no valid migration record
9452 * / no general migration in progress /
9453 ******************************************************************************/
9454 int save_checkpoint_imsm(struct supertype
*st
, struct mdinfo
*info
, int state
)
9456 struct intel_super
*super
= st
->sb
;
9457 unsigned long long blocks_per_unit
;
9458 unsigned long long curr_migr_unit
;
9460 if (load_imsm_migr_rec(super
, info
) != 0) {
9461 dprintf("imsm: ERROR: Cannot read migration record for checkpoint save.\n");
9465 blocks_per_unit
= __le32_to_cpu(super
->migr_rec
->blocks_per_unit
);
9466 if (blocks_per_unit
== 0) {
9467 dprintf("imsm: no migration in progress.\n");
9470 curr_migr_unit
= info
->reshape_progress
/ blocks_per_unit
;
9471 /* check if array is alligned to copy area
9472 * if it is not alligned, add one to current migration unit value
9473 * this can happend on array reshape finish only
9475 if (info
->reshape_progress
% blocks_per_unit
)
9478 super
->migr_rec
->curr_migr_unit
=
9479 __cpu_to_le32(curr_migr_unit
);
9480 super
->migr_rec
->rec_status
= __cpu_to_le32(state
);
9481 super
->migr_rec
->dest_1st_member_lba
=
9482 __cpu_to_le32(curr_migr_unit
*
9483 __le32_to_cpu(super
->migr_rec
->dest_depth_per_unit
));
9484 if (write_imsm_migr_rec(st
) < 0) {
9485 dprintf("imsm: Cannot write migration record outside backup area\n");
9492 /*******************************************************************************
9493 * Function: recover_backup_imsm
9494 * Description: Function recovers critical data from the Migration Copy Area
9495 * while assembling an array.
9497 * super : imsm internal array info
9498 * info : general array info
9500 * 0 : success (or there is no data to recover)
9502 ******************************************************************************/
9503 int recover_backup_imsm(struct supertype
*st
, struct mdinfo
*info
)
9505 struct intel_super
*super
= st
->sb
;
9506 struct migr_record
*migr_rec
= super
->migr_rec
;
9507 struct imsm_map
*map_dest
;
9508 struct intel_dev
*id
= NULL
;
9509 unsigned long long read_offset
;
9510 unsigned long long write_offset
;
9512 int *targets
= NULL
;
9513 int new_disks
, i
, err
;
9516 unsigned long curr_migr_unit
= __le32_to_cpu(migr_rec
->curr_migr_unit
);
9517 unsigned long num_migr_units
= __le32_to_cpu(migr_rec
->num_migr_units
);
9519 int skipped_disks
= 0;
9521 err
= sysfs_get_str(info
, NULL
, "array_state", (char *)buffer
, 20);
9525 /* recover data only during assemblation */
9526 if (strncmp(buffer
, "inactive", 8) != 0)
9528 /* no data to recover */
9529 if (__le32_to_cpu(migr_rec
->rec_status
) == UNIT_SRC_NORMAL
)
9531 if (curr_migr_unit
>= num_migr_units
)
9534 /* find device during reshape */
9535 for (id
= super
->devlist
; id
; id
= id
->next
)
9536 if (is_gen_migration(id
->dev
))
9541 map_dest
= get_imsm_map(id
->dev
, MAP_0
);
9542 new_disks
= map_dest
->num_members
;
9544 read_offset
= (unsigned long long)
9545 __le32_to_cpu(migr_rec
->ckpt_area_pba
) * 512;
9547 write_offset
= ((unsigned long long)
9548 __le32_to_cpu(migr_rec
->dest_1st_member_lba
) +
9549 pba_of_lba0(map_dest
)) * 512;
9551 unit_len
= __le32_to_cpu(migr_rec
->dest_depth_per_unit
) * 512;
9552 if (posix_memalign((void **)&buf
, 512, unit_len
) != 0)
9554 targets
= xcalloc(new_disks
, sizeof(int));
9556 if (open_backup_targets(info
, new_disks
, targets
, super
, id
->dev
)) {
9557 pr_err("Cannot open some devices belonging to array.\n");
9561 for (i
= 0; i
< new_disks
; i
++) {
9562 if (targets
[i
] < 0) {
9566 if (lseek64(targets
[i
], read_offset
, SEEK_SET
) < 0) {
9567 pr_err("Cannot seek to block: %s\n",
9572 if ((unsigned)read(targets
[i
], buf
, unit_len
) != unit_len
) {
9573 pr_err("Cannot read copy area block: %s\n",
9578 if (lseek64(targets
[i
], write_offset
, SEEK_SET
) < 0) {
9579 pr_err("Cannot seek to block: %s\n",
9584 if ((unsigned)write(targets
[i
], buf
, unit_len
) != unit_len
) {
9585 pr_err("Cannot restore block: %s\n",
9592 if (skipped_disks
> imsm_get_allowed_degradation(info
->new_level
,
9596 pr_err("Cannot restore data from backup. Too many failed disks\n");
9600 if (save_checkpoint_imsm(st
, info
, UNIT_SRC_NORMAL
)) {
9601 /* ignore error == 2, this can mean end of reshape here
9603 dprintf("imsm: Cannot write checkpoint to migration record (UNIT_SRC_NORMAL) during restart\n");
9609 for (i
= 0; i
< new_disks
; i
++)
9618 static char disk_by_path
[] = "/dev/disk/by-path/";
9620 static const char *imsm_get_disk_controller_domain(const char *path
)
9622 char disk_path
[PATH_MAX
];
9626 strcpy(disk_path
, disk_by_path
);
9627 strncat(disk_path
, path
, PATH_MAX
- strlen(disk_path
) - 1);
9628 if (stat(disk_path
, &st
) == 0) {
9629 struct sys_dev
* hba
;
9632 path
= devt_to_devpath(st
.st_rdev
);
9635 hba
= find_disk_attached_hba(-1, path
);
9636 if (hba
&& hba
->type
== SYS_DEV_SAS
)
9638 else if (hba
&& hba
->type
== SYS_DEV_SATA
)
9642 dprintf("path: %s hba: %s attached: %s\n",
9643 path
, (hba
) ? hba
->path
: "NULL", drv
);
9649 static char *imsm_find_array_devnm_by_subdev(int subdev
, char *container
)
9651 static char devnm
[32];
9652 char subdev_name
[20];
9653 struct mdstat_ent
*mdstat
;
9655 sprintf(subdev_name
, "%d", subdev
);
9656 mdstat
= mdstat_by_subdev(subdev_name
, container
);
9660 strcpy(devnm
, mdstat
->devnm
);
9661 free_mdstat(mdstat
);
9665 static int imsm_reshape_is_allowed_on_container(struct supertype
*st
,
9666 struct geo_params
*geo
,
9667 int *old_raid_disks
,
9670 /* currently we only support increasing the number of devices
9671 * for a container. This increases the number of device for each
9672 * member array. They must all be RAID0 or RAID5.
9675 struct mdinfo
*info
, *member
;
9676 int devices_that_can_grow
= 0;
9678 dprintf("imsm: imsm_reshape_is_allowed_on_container(ENTER): st->devnm = (%s)\n", st
->devnm
);
9680 if (geo
->size
> 0 ||
9681 geo
->level
!= UnSet
||
9682 geo
->layout
!= UnSet
||
9683 geo
->chunksize
!= 0 ||
9684 geo
->raid_disks
== UnSet
) {
9685 dprintf("imsm: Container operation is allowed for raid disks number change only.\n");
9689 if (direction
== ROLLBACK_METADATA_CHANGES
) {
9690 dprintf("imsm: Metadata changes rollback is not supported for container operation.\n");
9694 info
= container_content_imsm(st
, NULL
);
9695 for (member
= info
; member
; member
= member
->next
) {
9698 dprintf("imsm: checking device_num: %i\n",
9699 member
->container_member
);
9701 if (geo
->raid_disks
<= member
->array
.raid_disks
) {
9702 /* we work on container for Online Capacity Expansion
9703 * only so raid_disks has to grow
9705 dprintf("imsm: for container operation raid disks increase is required\n");
9709 if ((info
->array
.level
!= 0) &&
9710 (info
->array
.level
!= 5)) {
9711 /* we cannot use this container with other raid level
9713 dprintf("imsm: for container operation wrong raid level (%i) detected\n",
9717 /* check for platform support
9718 * for this raid level configuration
9720 struct intel_super
*super
= st
->sb
;
9721 if (!is_raid_level_supported(super
->orom
,
9722 member
->array
.level
,
9724 dprintf("platform does not support raid%d with %d disk%s\n",
9727 geo
->raid_disks
> 1 ? "s" : "");
9730 /* check if component size is aligned to chunk size
9732 if (info
->component_size
%
9733 (info
->array
.chunk_size
/512)) {
9734 dprintf("Component size is not aligned to chunk size\n");
9739 if (*old_raid_disks
&&
9740 info
->array
.raid_disks
!= *old_raid_disks
)
9742 *old_raid_disks
= info
->array
.raid_disks
;
9744 /* All raid5 and raid0 volumes in container
9745 * have to be ready for Online Capacity Expansion
9746 * so they need to be assembled. We have already
9747 * checked that no recovery etc is happening.
9749 result
= imsm_find_array_devnm_by_subdev(member
->container_member
,
9750 st
->container_devnm
);
9751 if (result
== NULL
) {
9752 dprintf("imsm: cannot find array\n");
9755 devices_that_can_grow
++;
9758 if (!member
&& devices_that_can_grow
)
9762 dprintf("Container operation allowed\n");
9764 dprintf("Error: %i\n", ret_val
);
9769 /* Function: get_spares_for_grow
9770 * Description: Allocates memory and creates list of spare devices
9771 * avaliable in container. Checks if spare drive size is acceptable.
9772 * Parameters: Pointer to the supertype structure
9773 * Returns: Pointer to the list of spare devices (mdinfo structure) on success,
9776 static struct mdinfo
*get_spares_for_grow(struct supertype
*st
)
9778 unsigned long long min_size
= min_acceptable_spare_size_imsm(st
);
9779 return container_choose_spares(st
, min_size
, NULL
, NULL
, NULL
, 0);
9782 /******************************************************************************
9783 * function: imsm_create_metadata_update_for_reshape
9784 * Function creates update for whole IMSM container.
9786 ******************************************************************************/
9787 static int imsm_create_metadata_update_for_reshape(
9788 struct supertype
*st
,
9789 struct geo_params
*geo
,
9791 struct imsm_update_reshape
**updatep
)
9793 struct intel_super
*super
= st
->sb
;
9794 struct imsm_super
*mpb
= super
->anchor
;
9795 int update_memory_size
;
9796 struct imsm_update_reshape
*u
;
9797 struct mdinfo
*spares
;
9802 dprintf("(enter) raid_disks = %i\n", geo
->raid_disks
);
9804 delta_disks
= geo
->raid_disks
- old_raid_disks
;
9806 /* size of all update data without anchor */
9807 update_memory_size
= sizeof(struct imsm_update_reshape
);
9809 /* now add space for spare disks that we need to add. */
9810 update_memory_size
+= sizeof(u
->new_disks
[0]) * (delta_disks
- 1);
9812 u
= xcalloc(1, update_memory_size
);
9813 u
->type
= update_reshape_container_disks
;
9814 u
->old_raid_disks
= old_raid_disks
;
9815 u
->new_raid_disks
= geo
->raid_disks
;
9817 /* now get spare disks list
9819 spares
= get_spares_for_grow(st
);
9822 || delta_disks
> spares
->array
.spare_disks
) {
9823 pr_err("imsm: ERROR: Cannot get spare devices for %s.\n", geo
->dev_name
);
9828 /* we have got spares
9829 * update disk list in imsm_disk list table in anchor
9831 dprintf("imsm: %i spares are available.\n\n",
9832 spares
->array
.spare_disks
);
9835 for (i
= 0; i
< delta_disks
; i
++) {
9840 u
->new_disks
[i
] = makedev(dev
->disk
.major
,
9842 dl
= get_disk_super(super
, dev
->disk
.major
, dev
->disk
.minor
);
9843 dl
->index
= mpb
->num_disks
;
9853 dprintf("imsm: reshape update preparation :");
9854 if (i
== delta_disks
) {
9855 dprintf_cont(" OK\n");
9857 return update_memory_size
;
9860 dprintf_cont(" Error\n");
9865 /******************************************************************************
9866 * function: imsm_create_metadata_update_for_size_change()
9867 * Creates update for IMSM array for array size change.
9869 ******************************************************************************/
9870 static int imsm_create_metadata_update_for_size_change(
9871 struct supertype
*st
,
9872 struct geo_params
*geo
,
9873 struct imsm_update_size_change
**updatep
)
9875 struct intel_super
*super
= st
->sb
;
9876 int update_memory_size
;
9877 struct imsm_update_size_change
*u
;
9879 dprintf("(enter) New size = %llu\n", geo
->size
);
9881 /* size of all update data without anchor */
9882 update_memory_size
= sizeof(struct imsm_update_size_change
);
9884 u
= xcalloc(1, update_memory_size
);
9885 u
->type
= update_size_change
;
9886 u
->subdev
= super
->current_vol
;
9887 u
->new_size
= geo
->size
;
9889 dprintf("imsm: reshape update preparation : OK\n");
9892 return update_memory_size
;
9895 /******************************************************************************
9896 * function: imsm_create_metadata_update_for_migration()
9897 * Creates update for IMSM array.
9899 ******************************************************************************/
9900 static int imsm_create_metadata_update_for_migration(
9901 struct supertype
*st
,
9902 struct geo_params
*geo
,
9903 struct imsm_update_reshape_migration
**updatep
)
9905 struct intel_super
*super
= st
->sb
;
9906 int update_memory_size
;
9907 struct imsm_update_reshape_migration
*u
;
9908 struct imsm_dev
*dev
;
9909 int previous_level
= -1;
9911 dprintf("(enter) New Level = %i\n", geo
->level
);
9913 /* size of all update data without anchor */
9914 update_memory_size
= sizeof(struct imsm_update_reshape_migration
);
9916 u
= xcalloc(1, update_memory_size
);
9917 u
->type
= update_reshape_migration
;
9918 u
->subdev
= super
->current_vol
;
9919 u
->new_level
= geo
->level
;
9920 u
->new_layout
= geo
->layout
;
9921 u
->new_raid_disks
= u
->old_raid_disks
= geo
->raid_disks
;
9922 u
->new_disks
[0] = -1;
9923 u
->new_chunksize
= -1;
9925 dev
= get_imsm_dev(super
, u
->subdev
);
9927 struct imsm_map
*map
;
9929 map
= get_imsm_map(dev
, MAP_0
);
9931 int current_chunk_size
=
9932 __le16_to_cpu(map
->blocks_per_strip
) / 2;
9934 if (geo
->chunksize
!= current_chunk_size
) {
9935 u
->new_chunksize
= geo
->chunksize
/ 1024;
9936 dprintf("imsm: chunk size change from %i to %i\n",
9937 current_chunk_size
, u
->new_chunksize
);
9939 previous_level
= map
->raid_level
;
9942 if ((geo
->level
== 5) && (previous_level
== 0)) {
9943 struct mdinfo
*spares
= NULL
;
9945 u
->new_raid_disks
++;
9946 spares
= get_spares_for_grow(st
);
9947 if ((spares
== NULL
) || (spares
->array
.spare_disks
< 1)) {
9950 update_memory_size
= 0;
9951 dprintf("error: cannot get spare device for requested migration");
9956 dprintf("imsm: reshape update preparation : OK\n");
9959 return update_memory_size
;
9962 static void imsm_update_metadata_locally(struct supertype
*st
,
9965 struct metadata_update mu
;
9970 mu
.space_list
= NULL
;
9972 if (imsm_prepare_update(st
, &mu
))
9973 imsm_process_update(st
, &mu
);
9975 while (mu
.space_list
) {
9976 void **space
= mu
.space_list
;
9977 mu
.space_list
= *space
;
9982 /***************************************************************************
9983 * Function: imsm_analyze_change
9984 * Description: Function analyze change for single volume
9985 * and validate if transition is supported
9986 * Parameters: Geometry parameters, supertype structure,
9987 * metadata change direction (apply/rollback)
9988 * Returns: Operation type code on success, -1 if fail
9989 ****************************************************************************/
9990 enum imsm_reshape_type
imsm_analyze_change(struct supertype
*st
,
9991 struct geo_params
*geo
,
9998 /* number of added/removed disks in operation result */
9999 int devNumChange
= 0;
10000 /* imsm compatible layout value for array geometry verification */
10001 int imsm_layout
= -1;
10003 struct imsm_dev
*dev
;
10004 struct intel_super
*super
;
10005 unsigned long long current_size
;
10006 unsigned long long free_size
;
10007 unsigned long long max_size
;
10010 getinfo_super_imsm_volume(st
, &info
, NULL
);
10011 if ((geo
->level
!= info
.array
.level
) &&
10012 (geo
->level
>= 0) &&
10013 (geo
->level
!= UnSet
)) {
10014 switch (info
.array
.level
) {
10016 if (geo
->level
== 5) {
10017 change
= CH_MIGRATION
;
10018 if (geo
->layout
!= ALGORITHM_LEFT_ASYMMETRIC
) {
10019 pr_err("Error. Requested Layout not supported (left-asymmetric layout is supported only)!\n");
10021 goto analyse_change_exit
;
10023 imsm_layout
= geo
->layout
;
10025 devNumChange
= 1; /* parity disk added */
10026 } else if (geo
->level
== 10) {
10027 change
= CH_TAKEOVER
;
10029 devNumChange
= 2; /* two mirrors added */
10030 imsm_layout
= 0x102; /* imsm supported layout */
10035 if (geo
->level
== 0) {
10036 change
= CH_TAKEOVER
;
10038 devNumChange
= -(geo
->raid_disks
/2);
10039 imsm_layout
= 0; /* imsm raid0 layout */
10043 if (change
== -1) {
10044 pr_err("Error. Level Migration from %d to %d not supported!\n",
10045 info
.array
.level
, geo
->level
);
10046 goto analyse_change_exit
;
10049 geo
->level
= info
.array
.level
;
10051 if ((geo
->layout
!= info
.array
.layout
)
10052 && ((geo
->layout
!= UnSet
) && (geo
->layout
!= -1))) {
10053 change
= CH_MIGRATION
;
10054 if ((info
.array
.layout
== 0)
10055 && (info
.array
.level
== 5)
10056 && (geo
->layout
== 5)) {
10057 /* reshape 5 -> 4 */
10058 } else if ((info
.array
.layout
== 5)
10059 && (info
.array
.level
== 5)
10060 && (geo
->layout
== 0)) {
10061 /* reshape 4 -> 5 */
10065 pr_err("Error. Layout Migration from %d to %d not supported!\n",
10066 info
.array
.layout
, geo
->layout
);
10068 goto analyse_change_exit
;
10071 geo
->layout
= info
.array
.layout
;
10072 if (imsm_layout
== -1)
10073 imsm_layout
= info
.array
.layout
;
10076 if ((geo
->chunksize
> 0) && (geo
->chunksize
!= UnSet
)
10077 && (geo
->chunksize
!= info
.array
.chunk_size
))
10078 change
= CH_MIGRATION
;
10080 geo
->chunksize
= info
.array
.chunk_size
;
10082 chunk
= geo
->chunksize
/ 1024;
10085 dev
= get_imsm_dev(super
, super
->current_vol
);
10086 data_disks
= imsm_num_data_members(dev
, MAP_0
);
10087 /* compute current size per disk member
10089 current_size
= info
.custom_array_size
/ data_disks
;
10091 if ((geo
->size
> 0) && (geo
->size
!= MAX_SIZE
)) {
10092 /* align component size
10094 geo
->size
= imsm_component_size_aligment_check(
10095 get_imsm_raid_level(dev
->vol
.map
),
10098 if (geo
->size
== 0) {
10099 pr_err("Error. Size expansion is supported only (current size is %llu, requested size /rounded/ is 0).\n",
10101 goto analyse_change_exit
;
10105 if ((current_size
!= geo
->size
) && (geo
->size
> 0)) {
10106 if (change
!= -1) {
10107 pr_err("Error. Size change should be the only one at a time.\n");
10109 goto analyse_change_exit
;
10111 if ((super
->current_vol
+ 1) != super
->anchor
->num_raid_devs
) {
10112 pr_err("Error. The last volume in container can be expanded only (%i/%s).\n",
10113 super
->current_vol
, st
->devnm
);
10114 goto analyse_change_exit
;
10116 /* check the maximum available size
10118 rv
= imsm_get_free_size(st
, dev
->vol
.map
->num_members
,
10119 0, chunk
, &free_size
);
10121 /* Cannot find maximum available space
10125 max_size
= free_size
+ current_size
;
10126 /* align component size
10128 max_size
= imsm_component_size_aligment_check(
10129 get_imsm_raid_level(dev
->vol
.map
),
10133 if (geo
->size
== MAX_SIZE
) {
10134 /* requested size change to the maximum available size
10136 if (max_size
== 0) {
10137 pr_err("Error. Cannot find maximum available space.\n");
10139 goto analyse_change_exit
;
10141 geo
->size
= max_size
;
10144 if ((direction
== ROLLBACK_METADATA_CHANGES
)) {
10145 /* accept size for rollback only
10148 /* round size due to metadata compatibility
10150 geo
->size
= (geo
->size
>> SECT_PER_MB_SHIFT
)
10151 << SECT_PER_MB_SHIFT
;
10152 dprintf("Prepare update for size change to %llu\n",
10154 if (current_size
>= geo
->size
) {
10155 pr_err("Error. Size expansion is supported only (current size is %llu, requested size /rounded/ is %llu).\n",
10156 current_size
, geo
->size
);
10157 goto analyse_change_exit
;
10159 if (max_size
&& geo
->size
> max_size
) {
10160 pr_err("Error. Requested size is larger than maximum available size (maximum available size is %llu, requested size /rounded/ is %llu).\n",
10161 max_size
, geo
->size
);
10162 goto analyse_change_exit
;
10165 geo
->size
*= data_disks
;
10166 geo
->raid_disks
= dev
->vol
.map
->num_members
;
10167 change
= CH_ARRAY_SIZE
;
10169 if (!validate_geometry_imsm(st
,
10172 geo
->raid_disks
+ devNumChange
,
10174 geo
->size
, INVALID_SECTORS
,
10179 struct intel_super
*super
= st
->sb
;
10180 struct imsm_super
*mpb
= super
->anchor
;
10182 if (mpb
->num_raid_devs
> 1) {
10183 pr_err("Error. Cannot perform operation on %s- for this operation it MUST be single array in container\n",
10189 analyse_change_exit
:
10190 if ((direction
== ROLLBACK_METADATA_CHANGES
) &&
10191 ((change
== CH_MIGRATION
) || (change
== CH_TAKEOVER
))) {
10192 dprintf("imsm: Metadata changes rollback is not supported for migration and takeover operations.\n");
10198 int imsm_takeover(struct supertype
*st
, struct geo_params
*geo
)
10200 struct intel_super
*super
= st
->sb
;
10201 struct imsm_update_takeover
*u
;
10203 u
= xmalloc(sizeof(struct imsm_update_takeover
));
10205 u
->type
= update_takeover
;
10206 u
->subarray
= super
->current_vol
;
10208 /* 10->0 transition */
10209 if (geo
->level
== 0)
10210 u
->direction
= R10_TO_R0
;
10212 /* 0->10 transition */
10213 if (geo
->level
== 10)
10214 u
->direction
= R0_TO_R10
;
10216 /* update metadata locally */
10217 imsm_update_metadata_locally(st
, u
,
10218 sizeof(struct imsm_update_takeover
));
10219 /* and possibly remotely */
10220 if (st
->update_tail
)
10221 append_metadata_update(st
, u
,
10222 sizeof(struct imsm_update_takeover
));
10229 static int imsm_reshape_super(struct supertype
*st
, unsigned long long size
,
10231 int layout
, int chunksize
, int raid_disks
,
10232 int delta_disks
, char *backup
, char *dev
,
10233 int direction
, int verbose
)
10236 struct geo_params geo
;
10238 dprintf("(enter)\n");
10240 memset(&geo
, 0, sizeof(struct geo_params
));
10242 geo
.dev_name
= dev
;
10243 strcpy(geo
.devnm
, st
->devnm
);
10246 geo
.layout
= layout
;
10247 geo
.chunksize
= chunksize
;
10248 geo
.raid_disks
= raid_disks
;
10249 if (delta_disks
!= UnSet
)
10250 geo
.raid_disks
+= delta_disks
;
10252 dprintf("for level : %i\n", geo
.level
);
10253 dprintf("for raid_disks : %i\n", geo
.raid_disks
);
10255 if (experimental() == 0)
10258 if (strcmp(st
->container_devnm
, st
->devnm
) == 0) {
10259 /* On container level we can only increase number of devices. */
10260 dprintf("imsm: info: Container operation\n");
10261 int old_raid_disks
= 0;
10263 if (imsm_reshape_is_allowed_on_container(
10264 st
, &geo
, &old_raid_disks
, direction
)) {
10265 struct imsm_update_reshape
*u
= NULL
;
10268 len
= imsm_create_metadata_update_for_reshape(
10269 st
, &geo
, old_raid_disks
, &u
);
10272 dprintf("imsm: Cannot prepare update\n");
10273 goto exit_imsm_reshape_super
;
10277 /* update metadata locally */
10278 imsm_update_metadata_locally(st
, u
, len
);
10279 /* and possibly remotely */
10280 if (st
->update_tail
)
10281 append_metadata_update(st
, u
, len
);
10286 pr_err("(imsm) Operation is not allowed on this container\n");
10289 /* On volume level we support following operations
10290 * - takeover: raid10 -> raid0; raid0 -> raid10
10291 * - chunk size migration
10292 * - migration: raid5 -> raid0; raid0 -> raid5
10294 struct intel_super
*super
= st
->sb
;
10295 struct intel_dev
*dev
= super
->devlist
;
10297 dprintf("imsm: info: Volume operation\n");
10298 /* find requested device */
10301 imsm_find_array_devnm_by_subdev(
10302 dev
->index
, st
->container_devnm
);
10303 if (devnm
&& strcmp(devnm
, geo
.devnm
) == 0)
10308 pr_err("Cannot find %s (%s) subarray\n",
10309 geo
.dev_name
, geo
.devnm
);
10310 goto exit_imsm_reshape_super
;
10312 super
->current_vol
= dev
->index
;
10313 change
= imsm_analyze_change(st
, &geo
, direction
);
10316 ret_val
= imsm_takeover(st
, &geo
);
10318 case CH_MIGRATION
: {
10319 struct imsm_update_reshape_migration
*u
= NULL
;
10321 imsm_create_metadata_update_for_migration(
10324 dprintf("imsm: Cannot prepare update\n");
10328 /* update metadata locally */
10329 imsm_update_metadata_locally(st
, u
, len
);
10330 /* and possibly remotely */
10331 if (st
->update_tail
)
10332 append_metadata_update(st
, u
, len
);
10337 case CH_ARRAY_SIZE
: {
10338 struct imsm_update_size_change
*u
= NULL
;
10340 imsm_create_metadata_update_for_size_change(
10343 dprintf("imsm: Cannot prepare update\n");
10347 /* update metadata locally */
10348 imsm_update_metadata_locally(st
, u
, len
);
10349 /* and possibly remotely */
10350 if (st
->update_tail
)
10351 append_metadata_update(st
, u
, len
);
10361 exit_imsm_reshape_super
:
10362 dprintf("imsm: reshape_super Exit code = %i\n", ret_val
);
10366 /*******************************************************************************
10367 * Function: wait_for_reshape_imsm
10368 * Description: Function writes new sync_max value and waits until
10369 * reshape process reach new position
10371 * sra : general array info
10372 * ndata : number of disks in new array's layout
10375 * 1 : there is no reshape in progress,
10377 ******************************************************************************/
10378 int wait_for_reshape_imsm(struct mdinfo
*sra
, int ndata
)
10380 int fd
= sysfs_get_fd(sra
, NULL
, "sync_completed");
10382 unsigned long long completed
;
10383 /* to_complete : new sync_max position */
10384 unsigned long long to_complete
= sra
->reshape_progress
;
10385 unsigned long long position_to_set
= to_complete
/ ndata
;
10388 dprintf("cannot open reshape_position\n");
10393 if (sysfs_fd_get_ll(fd
, &completed
) < 0) {
10395 dprintf("cannot read reshape_position (no reshape in progres)\n");
10404 if (completed
> position_to_set
) {
10405 dprintf("wrong next position to set %llu (%llu)\n",
10406 to_complete
, position_to_set
);
10410 dprintf("Position set: %llu\n", position_to_set
);
10411 if (sysfs_set_num(sra
, NULL
, "sync_max",
10412 position_to_set
) != 0) {
10413 dprintf("cannot set reshape position to %llu\n",
10421 int timeout
= 3000;
10422 sysfs_wait(fd
, &timeout
);
10423 if (sysfs_get_str(sra
, NULL
, "sync_action",
10425 strncmp(action
, "reshape", 7) != 0) {
10429 if (sysfs_fd_get_ll(fd
, &completed
) < 0) {
10430 dprintf("cannot read reshape_position (in loop)\n");
10434 } while (completed
< position_to_set
);
10440 /*******************************************************************************
10441 * Function: check_degradation_change
10442 * Description: Check that array hasn't become failed.
10444 * info : for sysfs access
10445 * sources : source disks descriptors
10446 * degraded: previous degradation level
10448 * degradation level
10449 ******************************************************************************/
10450 int check_degradation_change(struct mdinfo
*info
,
10454 unsigned long long new_degraded
;
10457 rv
= sysfs_get_ll(info
, NULL
, "degraded", &new_degraded
);
10458 if ((rv
== -1) || (new_degraded
!= (unsigned long long)degraded
)) {
10459 /* check each device to ensure it is still working */
10462 for (sd
= info
->devs
; sd
; sd
= sd
->next
) {
10463 if (sd
->disk
.state
& (1<<MD_DISK_FAULTY
))
10465 if (sd
->disk
.state
& (1<<MD_DISK_SYNC
)) {
10467 if (sysfs_get_str(info
,
10468 sd
, "state", sbuf
, 20) < 0 ||
10469 strstr(sbuf
, "faulty") ||
10470 strstr(sbuf
, "in_sync") == NULL
) {
10471 /* this device is dead */
10472 sd
->disk
.state
= (1<<MD_DISK_FAULTY
);
10473 if (sd
->disk
.raid_disk
>= 0 &&
10474 sources
[sd
->disk
.raid_disk
] >= 0) {
10476 sd
->disk
.raid_disk
]);
10477 sources
[sd
->disk
.raid_disk
] =
10486 return new_degraded
;
10489 /*******************************************************************************
10490 * Function: imsm_manage_reshape
10491 * Description: Function finds array under reshape and it manages reshape
10492 * process. It creates stripes backups (if required) and sets
10495 * afd : Backup handle (nattive) - not used
10496 * sra : general array info
10497 * reshape : reshape parameters - not used
10498 * st : supertype structure
10499 * blocks : size of critical section [blocks]
10500 * fds : table of source device descriptor
10501 * offsets : start of array (offest per devices)
10503 * destfd : table of destination device descriptor
10504 * destoffsets : table of destination offsets (per device)
10506 * 1 : success, reshape is done
10508 ******************************************************************************/
10509 static int imsm_manage_reshape(
10510 int afd
, struct mdinfo
*sra
, struct reshape
*reshape
,
10511 struct supertype
*st
, unsigned long backup_blocks
,
10512 int *fds
, unsigned long long *offsets
,
10513 int dests
, int *destfd
, unsigned long long *destoffsets
)
10516 struct intel_super
*super
= st
->sb
;
10517 struct intel_dev
*dv
;
10518 struct imsm_dev
*dev
= NULL
;
10519 struct imsm_map
*map_src
;
10520 int migr_vol_qan
= 0;
10521 int ndata
, odata
; /* [bytes] */
10522 int chunk
; /* [bytes] */
10523 struct migr_record
*migr_rec
;
10525 unsigned int buf_size
; /* [bytes] */
10526 unsigned long long max_position
; /* array size [bytes] */
10527 unsigned long long next_step
; /* [blocks]/[bytes] */
10528 unsigned long long old_data_stripe_length
;
10529 unsigned long long start_src
; /* [bytes] */
10530 unsigned long long start
; /* [bytes] */
10531 unsigned long long start_buf_shift
; /* [bytes] */
10533 int source_layout
= 0;
10538 if (!fds
|| !offsets
)
10541 /* Find volume during the reshape */
10542 for (dv
= super
->devlist
; dv
; dv
= dv
->next
) {
10543 if (dv
->dev
->vol
.migr_type
== MIGR_GEN_MIGR
10544 && dv
->dev
->vol
.migr_state
== 1) {
10549 /* Only one volume can migrate at the same time */
10550 if (migr_vol_qan
!= 1) {
10551 pr_err(": %s", migr_vol_qan
?
10552 "Number of migrating volumes greater than 1\n" :
10553 "There is no volume during migrationg\n");
10557 map_src
= get_imsm_map(dev
, MAP_1
);
10558 if (map_src
== NULL
)
10561 ndata
= imsm_num_data_members(dev
, MAP_0
);
10562 odata
= imsm_num_data_members(dev
, MAP_1
);
10564 chunk
= __le16_to_cpu(map_src
->blocks_per_strip
) * 512;
10565 old_data_stripe_length
= odata
* chunk
;
10567 migr_rec
= super
->migr_rec
;
10569 /* initialize migration record for start condition */
10570 if (sra
->reshape_progress
== 0)
10571 init_migr_record_imsm(st
, dev
, sra
);
10573 if (__le32_to_cpu(migr_rec
->rec_status
) != UNIT_SRC_NORMAL
) {
10574 dprintf("imsm: cannot restart migration when data are present in copy area.\n");
10577 /* Save checkpoint to update migration record for current
10578 * reshape position (in md). It can be farther than current
10579 * reshape position in metadata.
10581 if (save_checkpoint_imsm(st
, sra
, UNIT_SRC_NORMAL
) == 1) {
10582 /* ignore error == 2, this can mean end of reshape here
10584 dprintf("imsm: Cannot write checkpoint to migration record (UNIT_SRC_NORMAL, initial save)\n");
10589 /* size for data */
10590 buf_size
= __le32_to_cpu(migr_rec
->blocks_per_unit
) * 512;
10591 /* extend buffer size for parity disk */
10592 buf_size
+= __le32_to_cpu(migr_rec
->dest_depth_per_unit
) * 512;
10593 /* add space for stripe aligment */
10594 buf_size
+= old_data_stripe_length
;
10595 if (posix_memalign((void **)&buf
, 4096, buf_size
)) {
10596 dprintf("imsm: Cannot allocate checpoint buffer\n");
10600 max_position
= sra
->component_size
* ndata
;
10601 source_layout
= imsm_level_to_layout(map_src
->raid_level
);
10603 while (__le32_to_cpu(migr_rec
->curr_migr_unit
) <
10604 __le32_to_cpu(migr_rec
->num_migr_units
)) {
10605 /* current reshape position [blocks] */
10606 unsigned long long current_position
=
10607 __le32_to_cpu(migr_rec
->blocks_per_unit
)
10608 * __le32_to_cpu(migr_rec
->curr_migr_unit
);
10609 unsigned long long border
;
10611 /* Check that array hasn't become failed.
10613 degraded
= check_degradation_change(sra
, fds
, degraded
);
10614 if (degraded
> 1) {
10615 dprintf("imsm: Abort reshape due to degradation level (%i)\n", degraded
);
10619 next_step
= __le32_to_cpu(migr_rec
->blocks_per_unit
);
10621 if ((current_position
+ next_step
) > max_position
)
10622 next_step
= max_position
- current_position
;
10624 start
= current_position
* 512;
10626 /* align reading start to old geometry */
10627 start_buf_shift
= start
% old_data_stripe_length
;
10628 start_src
= start
- start_buf_shift
;
10630 border
= (start_src
/ odata
) - (start
/ ndata
);
10632 if (border
<= __le32_to_cpu(migr_rec
->dest_depth_per_unit
)) {
10633 /* save critical stripes to buf
10634 * start - start address of current unit
10635 * to backup [bytes]
10636 * start_src - start address of current unit
10637 * to backup alligned to source array
10640 unsigned long long next_step_filler
;
10641 unsigned long long copy_length
= next_step
* 512;
10643 /* allign copy area length to stripe in old geometry */
10644 next_step_filler
= ((copy_length
+ start_buf_shift
)
10645 % old_data_stripe_length
);
10646 if (next_step_filler
)
10647 next_step_filler
= (old_data_stripe_length
10648 - next_step_filler
);
10649 dprintf("save_stripes() parameters: start = %llu,\tstart_src = %llu,\tnext_step*512 = %llu,\tstart_in_buf_shift = %llu,\tnext_step_filler = %llu\n",
10650 start
, start_src
, copy_length
,
10651 start_buf_shift
, next_step_filler
);
10653 if (save_stripes(fds
, offsets
, map_src
->num_members
,
10654 chunk
, map_src
->raid_level
,
10655 source_layout
, 0, NULL
, start_src
,
10657 next_step_filler
+ start_buf_shift
,
10659 dprintf("imsm: Cannot save stripes to buffer\n");
10662 /* Convert data to destination format and store it
10663 * in backup general migration area
10665 if (save_backup_imsm(st
, dev
, sra
,
10666 buf
+ start_buf_shift
, copy_length
)) {
10667 dprintf("imsm: Cannot save stripes to target devices\n");
10670 if (save_checkpoint_imsm(st
, sra
,
10671 UNIT_SRC_IN_CP_AREA
)) {
10672 dprintf("imsm: Cannot write checkpoint to migration record (UNIT_SRC_IN_CP_AREA)\n");
10676 /* set next step to use whole border area */
10677 border
/= next_step
;
10679 next_step
*= border
;
10681 /* When data backed up, checkpoint stored,
10682 * kick the kernel to reshape unit of data
10684 next_step
= next_step
+ sra
->reshape_progress
;
10685 /* limit next step to array max position */
10686 if (next_step
> max_position
)
10687 next_step
= max_position
;
10688 sysfs_set_num(sra
, NULL
, "suspend_lo", sra
->reshape_progress
);
10689 sysfs_set_num(sra
, NULL
, "suspend_hi", next_step
);
10690 sra
->reshape_progress
= next_step
;
10692 /* wait until reshape finish */
10693 if (wait_for_reshape_imsm(sra
, ndata
)) {
10694 dprintf("wait_for_reshape_imsm returned error!\n");
10700 if (save_checkpoint_imsm(st
, sra
, UNIT_SRC_NORMAL
) == 1) {
10701 /* ignore error == 2, this can mean end of reshape here
10703 dprintf("imsm: Cannot write checkpoint to migration record (UNIT_SRC_NORMAL)\n");
10709 /* clear migr_rec on disks after successful migration */
10712 memset(super
->migr_rec_buf
, 0, MIGR_REC_BUF_SIZE
);
10713 for (d
= super
->disks
; d
; d
= d
->next
) {
10714 if (d
->index
< 0 || is_failed(&d
->disk
))
10716 unsigned long long dsize
;
10718 get_dev_size(d
->fd
, NULL
, &dsize
);
10719 if (lseek64(d
->fd
, dsize
- MIGR_REC_POSITION
,
10721 if (write(d
->fd
, super
->migr_rec_buf
,
10722 MIGR_REC_BUF_SIZE
) != MIGR_REC_BUF_SIZE
)
10723 perror("Write migr_rec failed");
10727 /* return '1' if done */
10731 /* See Grow.c: abort_reshape() for further explanation */
10732 sysfs_set_num(sra
, NULL
, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL
);
10733 sysfs_set_num(sra
, NULL
, "suspend_hi", 0);
10734 sysfs_set_num(sra
, NULL
, "suspend_lo", 0);
10739 #endif /* MDASSEMBLE */
10741 struct superswitch super_imsm
= {
10743 .examine_super
= examine_super_imsm
,
10744 .brief_examine_super
= brief_examine_super_imsm
,
10745 .brief_examine_subarrays
= brief_examine_subarrays_imsm
,
10746 .export_examine_super
= export_examine_super_imsm
,
10747 .detail_super
= detail_super_imsm
,
10748 .brief_detail_super
= brief_detail_super_imsm
,
10749 .write_init_super
= write_init_super_imsm
,
10750 .validate_geometry
= validate_geometry_imsm
,
10751 .add_to_super
= add_to_super_imsm
,
10752 .remove_from_super
= remove_from_super_imsm
,
10753 .detail_platform
= detail_platform_imsm
,
10754 .export_detail_platform
= export_detail_platform_imsm
,
10755 .kill_subarray
= kill_subarray_imsm
,
10756 .update_subarray
= update_subarray_imsm
,
10757 .load_container
= load_container_imsm
,
10758 .default_geometry
= default_geometry_imsm
,
10759 .get_disk_controller_domain
= imsm_get_disk_controller_domain
,
10760 .reshape_super
= imsm_reshape_super
,
10761 .manage_reshape
= imsm_manage_reshape
,
10762 .recover_backup
= recover_backup_imsm
,
10763 .copy_metadata
= copy_metadata_imsm
,
10765 .match_home
= match_home_imsm
,
10766 .uuid_from_super
= uuid_from_super_imsm
,
10767 .getinfo_super
= getinfo_super_imsm
,
10768 .getinfo_super_disks
= getinfo_super_disks_imsm
,
10769 .update_super
= update_super_imsm
,
10771 .avail_size
= avail_size_imsm
,
10772 .min_acceptable_spare_size
= min_acceptable_spare_size_imsm
,
10774 .compare_super
= compare_super_imsm
,
10776 .load_super
= load_super_imsm
,
10777 .init_super
= init_super_imsm
,
10778 .store_super
= store_super_imsm
,
10779 .free_super
= free_super_imsm
,
10780 .match_metadata_desc
= match_metadata_desc_imsm
,
10781 .container_content
= container_content_imsm
,
10782 .validate_container
= validate_container_imsm
,
10789 .open_new
= imsm_open_new
,
10790 .set_array_state
= imsm_set_array_state
,
10791 .set_disk
= imsm_set_disk
,
10792 .sync_metadata
= imsm_sync_metadata
,
10793 .activate_spare
= imsm_activate_spare
,
10794 .process_update
= imsm_process_update
,
10795 .prepare_update
= imsm_prepare_update
,
10796 #endif /* MDASSEMBLE */