2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2006-2007 Neil Brown <neilb@suse.de>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Email: <neil@brown.name>
24 * Specifications for DDF takes from Common RAID DDF Specification Revision 1.2
25 * (July 28 2006). Reused by permission of SNIA.
28 #define HAVE_STDINT_H 1
34 /* a non-official T10 name for creation GUIDs */
35 static char T10
[] = "Linux-MD";
37 /* DDF timestamps are 1980 based, so we need to add
38 * second-in-decade-of-seventies to convert to linux timestamps.
39 * 10 years with 2 leap years.
41 #define DECADE (3600*24*(365*10+2))
44 const unsigned char *buf
,
47 /* The DDF metadata handling.
48 * DDF metadata lives at the end of the device.
49 * The last 512 byte block provides an 'anchor' which is used to locate
50 * the rest of the metadata which usually lives immediately behind the anchor.
53 * - all multibyte numeric fields are bigendian.
54 * - all strings are space padded.
58 /* Primary Raid Level (PRL) */
59 #define DDF_RAID0 0x00
60 #define DDF_RAID1 0x01
61 #define DDF_RAID3 0x03
62 #define DDF_RAID4 0x04
63 #define DDF_RAID5 0x05
64 #define DDF_RAID1E 0x11
66 #define DDF_CONCAT 0x1f
67 #define DDF_RAID5E 0x15
68 #define DDF_RAID5EE 0x25
69 #define DDF_RAID6 0x06
71 /* Raid Level Qualifier (RLQ) */
72 #define DDF_RAID0_SIMPLE 0x00
73 #define DDF_RAID1_SIMPLE 0x00 /* just 2 devices in this plex */
74 #define DDF_RAID1_MULTI 0x01 /* exactly 3 devices in this plex */
75 #define DDF_RAID3_0 0x00 /* parity in first extent */
76 #define DDF_RAID3_N 0x01 /* parity in last extent */
77 #define DDF_RAID4_0 0x00 /* parity in first extent */
78 #define DDF_RAID4_N 0x01 /* parity in last extent */
79 /* these apply to raid5e and raid5ee as well */
80 #define DDF_RAID5_0_RESTART 0x00 /* same as 'right asymmetric' - layout 1 */
81 #define DDF_RAID6_0_RESTART 0x01 /* raid6 different from raid5 here!!! */
82 #define DDF_RAID5_N_RESTART 0x02 /* same as 'left asymmetric' - layout 0 */
83 #define DDF_RAID5_N_CONTINUE 0x03 /* same as 'left symmetric' - layout 2 */
85 #define DDF_RAID1E_ADJACENT 0x00 /* raid10 nearcopies==2 */
86 #define DDF_RAID1E_OFFSET 0x01 /* raid10 offsetcopies==2 */
88 /* Secondary RAID Level (SRL) */
89 #define DDF_2STRIPED 0x00 /* This is weirder than RAID0 !! */
90 #define DDF_2MIRRORED 0x01
91 #define DDF_2CONCAT 0x02
92 #define DDF_2SPANNED 0x03 /* This is also weird - be careful */
95 #define DDF_HEADER_MAGIC __cpu_to_be32(0xDE11DE11)
96 #define DDF_CONTROLLER_MAGIC __cpu_to_be32(0xAD111111)
97 #define DDF_PHYS_RECORDS_MAGIC __cpu_to_be32(0x22222222)
98 #define DDF_PHYS_DATA_MAGIC __cpu_to_be32(0x33333333)
99 #define DDF_VIRT_RECORDS_MAGIC __cpu_to_be32(0xDDDDDDDD)
100 #define DDF_VD_CONF_MAGIC __cpu_to_be32(0xEEEEEEEE)
101 #define DDF_SPARE_ASSIGN_MAGIC __cpu_to_be32(0x55555555)
102 #define DDF_VU_CONF_MAGIC __cpu_to_be32(0x88888888)
103 #define DDF_VENDOR_LOG_MAGIC __cpu_to_be32(0x01dBEEF0)
104 #define DDF_BBM_LOG_MAGIC __cpu_to_be32(0xABADB10C)
106 #define DDF_GUID_LEN 24
107 #define DDF_REVISION_0 "01.00.00"
108 #define DDF_REVISION_2 "01.02.00"
111 __u32 magic
; /* DDF_HEADER_MAGIC */
113 char guid
[DDF_GUID_LEN
];
114 char revision
[8]; /* 01.02.00 */
115 __u32 seq
; /* starts at '1' */
120 __u8 pad0
; /* 0xff */
121 __u8 pad1
[12]; /* 12 * 0xff */
122 /* 64 bytes so far */
123 __u8 header_ext
[32]; /* reserved: fill with 0xff */
127 __u8 pad2
[3]; /* 0xff */
128 __u32 workspace_len
; /* sectors for vendor space -
129 * at least 32768(sectors) */
131 __u16 max_pd_entries
; /* one of 15, 63, 255, 1023, 4095 */
132 __u16 max_vd_entries
; /* 2^(4,6,8,10,12)-1 : i.e. as above */
133 __u16 max_partitions
; /* i.e. max num of configuration
134 record entries per disk */
135 __u16 config_record_len
; /* 1 +ROUNDUP(max_primary_element_entries
137 __u16 max_primary_element_entries
; /* 16, 64, 256, 1024, or 4096 */
138 __u8 pad3
[54]; /* 0xff */
139 /* 192 bytes so far */
140 __u32 controller_section_offset
;
141 __u32 controller_section_length
;
142 __u32 phys_section_offset
;
143 __u32 phys_section_length
;
144 __u32 virt_section_offset
;
145 __u32 virt_section_length
;
146 __u32 config_section_offset
;
147 __u32 config_section_length
;
148 __u32 data_section_offset
;
149 __u32 data_section_length
;
150 __u32 bbm_section_offset
;
151 __u32 bbm_section_length
;
152 __u32 diag_space_offset
;
153 __u32 diag_space_length
;
156 /* 256 bytes so far */
157 __u8 pad4
[256]; /* 0xff */
161 #define DDF_HEADER_ANCHOR 0x00
162 #define DDF_HEADER_PRIMARY 0x01
163 #define DDF_HEADER_SECONDARY 0x02
165 /* The content of the 'controller section' - global scope */
166 struct ddf_controller_data
{
167 __u32 magic
; /* DDF_CONTROLLER_MAGIC */
169 char guid
[DDF_GUID_LEN
];
170 struct controller_type
{
177 __u8 pad
[8]; /* 0xff */
178 __u8 vendor_data
[448];
181 /* The content of phys_section - global scope */
183 __u32 magic
; /* DDF_PHYS_RECORDS_MAGIC */
188 struct phys_disk_entry
{
189 char guid
[DDF_GUID_LEN
];
193 __u64 config_size
; /* DDF structures must be after here */
194 char path
[18]; /* another horrible structure really */
199 /* phys_disk_entry.type is a bitmap - bigendian remember */
200 #define DDF_Forced_PD_GUID 1
201 #define DDF_Active_in_VD 2
202 #define DDF_Global_Spare 4 /* VD_CONF records are ignored */
203 #define DDF_Spare 8 /* overrides Global_spare */
204 #define DDF_Foreign 16
205 #define DDF_Legacy 32 /* no DDF on this device */
207 #define DDF_Interface_mask 0xf00
208 #define DDF_Interface_SCSI 0x100
209 #define DDF_Interface_SAS 0x200
210 #define DDF_Interface_SATA 0x300
211 #define DDF_Interface_FC 0x400
213 /* phys_disk_entry.state is a bigendian bitmap */
215 #define DDF_Failed 2 /* overrides 1,4,8 */
216 #define DDF_Rebuilding 4
217 #define DDF_Transition 8
219 #define DDF_ReadErrors 32
220 #define DDF_Missing 64
222 /* The content of the virt_section global scope */
223 struct virtual_disk
{
224 __u32 magic
; /* DDF_VIRT_RECORDS_MAGIC */
226 __u16 populated_vdes
;
229 struct virtual_entry
{
230 char guid
[DDF_GUID_LEN
];
232 __u16 pad0
; /* 0xffff */
242 /* virtual_entry.type is a bitmap - bigendian */
244 #define DDF_Enforce_Groups 2
245 #define DDF_Unicode 4
246 #define DDF_Owner_Valid 8
248 /* virtual_entry.state is a bigendian bitmap */
249 #define DDF_state_mask 0x7
250 #define DDF_state_optimal 0x0
251 #define DDF_state_degraded 0x1
252 #define DDF_state_deleted 0x2
253 #define DDF_state_missing 0x3
254 #define DDF_state_failed 0x4
255 #define DDF_state_part_optimal 0x5
257 #define DDF_state_morphing 0x8
258 #define DDF_state_inconsistent 0x10
260 /* virtual_entry.init_state is a bigendian bitmap */
261 #define DDF_initstate_mask 0x03
262 #define DDF_init_not 0x00
263 #define DDF_init_quick 0x01 /* initialisation is progress.
264 * i.e. 'state_inconsistent' */
265 #define DDF_init_full 0x02
267 #define DDF_access_mask 0xc0
268 #define DDF_access_rw 0x00
269 #define DDF_access_ro 0x80
270 #define DDF_access_blocked 0xc0
272 /* The content of the config_section - local scope
273 * It has multiple records each config_record_len sectors
274 * They can be vd_config or spare_assign
278 __u32 magic
; /* DDF_VD_CONF_MAGIC */
280 char guid
[DDF_GUID_LEN
];
284 __u16 prim_elmnt_count
;
285 __u8 chunk_shift
; /* 0 == 512, 1==1024 etc */
288 __u8 sec_elmnt_count
;
291 __u64 blocks
; /* blocks per component could be different
292 * on different component devices...(only
293 * for concat I hope) */
294 __u64 array_blocks
; /* blocks in array */
302 __u8 v0
[32]; /* reserved- 0xff */
303 __u8 v1
[32]; /* reserved- 0xff */
304 __u8 v2
[16]; /* reserved- 0xff */
305 __u8 v3
[16]; /* reserved- 0xff */
307 __u32 phys_refnum
[0]; /* refnum of each disk in sequence */
308 /*__u64 lba_offset[0]; LBA offset in each phys. Note extents in a
309 bvd are always the same size */
312 /* vd_config.cache_pol[7] is a bitmap */
313 #define DDF_cache_writeback 1 /* else writethrough */
314 #define DDF_cache_wadaptive 2 /* only applies if writeback */
315 #define DDF_cache_readahead 4
316 #define DDF_cache_radaptive 8 /* only if doing read-ahead */
317 #define DDF_cache_ifnobatt 16 /* even to write cache if battery is poor */
318 #define DDF_cache_wallowed 32 /* enable write caching */
319 #define DDF_cache_rallowed 64 /* enable read caching */
321 struct spare_assign
{
322 __u32 magic
; /* DDF_SPARE_ASSIGN_MAGIC */
327 __u16 populated
; /* SAEs used */
328 __u16 max
; /* max SAEs */
330 struct spare_assign_entry
{
331 char guid
[DDF_GUID_LEN
];
332 __u16 secondary_element
;
336 /* spare_assign.type is a bitmap */
337 #define DDF_spare_dedicated 0x1 /* else global */
338 #define DDF_spare_revertible 0x2 /* else committable */
339 #define DDF_spare_active 0x4 /* else not active */
340 #define DDF_spare_affinity 0x8 /* enclosure affinity */
342 /* The data_section contents - local scope */
344 __u32 magic
; /* DDF_PHYS_DATA_MAGIC */
346 char guid
[DDF_GUID_LEN
];
347 __u32 refnum
; /* crc of some magic drive data ... */
348 __u8 forced_ref
; /* set when above was not result of magic */
349 __u8 forced_guid
; /* set if guid was forced rather than magic */
354 /* bbm_section content */
355 struct bad_block_log
{
362 struct mapped_block
{
363 __u64 defective_start
;
364 __u32 replacement_start
;
370 /* Struct for internally holding ddf structures */
371 /* The DDF structure stored on each device is potentially
372 * quite different, as some data is global and some is local.
373 * The global data is:
376 * - Physical disk records
377 * - Virtual disk records
379 * - Configuration records
380 * - Physical Disk data section
381 * ( and Bad block and vendor which I don't care about yet).
383 * The local data is parsed into separate lists as it is read
384 * and reconstructed for writing. This means that we only need
385 * to make config changes once and they are automatically
386 * propagated to all devices.
387 * Note that the ddf_super has space of the conf and disk data
388 * for this disk and also for a list of all such data.
389 * The list is only used for the superblock that is being
390 * built in Create or Assemble to describe the whole array.
393 struct ddf_header anchor
, primary
, secondary
;
394 struct ddf_controller_data controller
;
395 struct ddf_header
*active
;
396 struct phys_disk
*phys
;
397 struct virtual_disk
*virt
;
399 int max_part
, mppe
, conf_rec_len
;
407 __u64
*lba_offset
; /* location in 'conf' of
409 int vcnum
; /* index into ->virt */
410 __u64
*block_sizes
; /* NULL if all the same */
413 struct vd_config conf
;
414 } *conflist
, *currentconf
;
423 unsigned long long size
; /* sectors */
424 int pdnum
; /* index in ->phys */
425 struct spare_assign
*spare
;
428 struct disk_data disk
;
429 void *mdupdate
; /* hold metadata update */
430 struct vcl
*vlist
[0]; /* max_part in size */
435 #define offsetof(t,f) ((size_t)&(((t*)0)->f))
439 static int calc_crc(void *buf
, int len
)
441 /* crcs are always at the same place as in the ddf_header */
442 struct ddf_header
*ddf
= buf
;
443 __u32 oldcrc
= ddf
->crc
;
445 ddf
->crc
= 0xffffffff;
447 newcrc
= crc32(0, buf
, len
);
452 static int load_ddf_header(int fd
, unsigned long long lba
,
453 unsigned long long size
,
455 struct ddf_header
*hdr
, struct ddf_header
*anchor
)
457 /* read a ddf header (primary or secondary) from fd/lba
458 * and check that it is consistent with anchor
460 * magic, crc, guid, rev, and LBA's header_type, and
461 * everything after header_type must be the same
466 if (lseek64(fd
, lba
<<9, 0) < 0)
469 if (read(fd
, hdr
, 512) != 512)
472 if (hdr
->magic
!= DDF_HEADER_MAGIC
)
474 if (calc_crc(hdr
, 512) != hdr
->crc
)
476 if (memcmp(anchor
->guid
, hdr
->guid
, DDF_GUID_LEN
) != 0 ||
477 memcmp(anchor
->revision
, hdr
->revision
, 8) != 0 ||
478 anchor
->primary_lba
!= hdr
->primary_lba
||
479 anchor
->secondary_lba
!= hdr
->secondary_lba
||
481 memcmp(anchor
->pad2
, hdr
->pad2
, 512 -
482 offsetof(struct ddf_header
, pad2
)) != 0)
485 /* Looks good enough to me... */
489 static void *load_section(int fd
, struct ddf_super
*super
, void *buf
,
490 __u32 offset_be
, __u32 len_be
, int check
)
492 unsigned long long offset
= __be32_to_cpu(offset_be
);
493 unsigned long long len
= __be32_to_cpu(len_be
);
494 int dofree
= (buf
== NULL
);
497 if (len
!= 2 && len
!= 8 && len
!= 32
498 && len
!= 128 && len
!= 512)
504 /* All pre-allocated sections are a single block */
508 posix_memalign(&buf
, 512, len
<<9);
514 if (super
->active
->type
== 1)
515 offset
+= __be64_to_cpu(super
->active
->primary_lba
);
517 offset
+= __be64_to_cpu(super
->active
->secondary_lba
);
519 if (lseek64(fd
, offset
<<9, 0) != (offset
<<9)) {
524 if (read(fd
, buf
, len
<<9) != (len
<<9)) {
532 static int load_ddf_headers(int fd
, struct ddf_super
*super
, char *devname
)
534 unsigned long long dsize
;
536 get_dev_size(fd
, NULL
, &dsize
);
538 if (lseek64(fd
, dsize
-512, 0) < 0) {
541 Name
": Cannot seek to anchor block on %s: %s\n",
542 devname
, strerror(errno
));
545 if (read(fd
, &super
->anchor
, 512) != 512) {
548 Name
": Cannot read anchor block on %s: %s\n",
549 devname
, strerror(errno
));
552 if (super
->anchor
.magic
!= DDF_HEADER_MAGIC
) {
554 fprintf(stderr
, Name
": no DDF anchor found on %s\n",
558 if (calc_crc(&super
->anchor
, 512) != super
->anchor
.crc
) {
560 fprintf(stderr
, Name
": bad CRC on anchor on %s\n",
564 if (memcmp(super
->anchor
.revision
, DDF_REVISION_0
, 8) != 0 &&
565 memcmp(super
->anchor
.revision
, DDF_REVISION_2
, 8) != 0) {
567 fprintf(stderr
, Name
": can only support super revision"
568 " %.8s and earlier, not %.8s on %s\n",
569 DDF_REVISION_2
, super
->anchor
.revision
,devname
);
572 if (load_ddf_header(fd
, __be64_to_cpu(super
->anchor
.primary_lba
),
574 &super
->primary
, &super
->anchor
) == 0) {
577 Name
": Failed to load primary DDF header "
581 super
->active
= &super
->primary
;
582 if (load_ddf_header(fd
, __be64_to_cpu(super
->anchor
.secondary_lba
),
584 &super
->secondary
, &super
->anchor
)) {
585 if ((__be32_to_cpu(super
->primary
.seq
)
586 < __be32_to_cpu(super
->secondary
.seq
) &&
587 !super
->secondary
.openflag
)
588 || (__be32_to_cpu(super
->primary
.seq
)
589 == __be32_to_cpu(super
->secondary
.seq
) &&
590 super
->primary
.openflag
&& !super
->secondary
.openflag
)
592 super
->active
= &super
->secondary
;
597 static int load_ddf_global(int fd
, struct ddf_super
*super
, char *devname
)
600 ok
= load_section(fd
, super
, &super
->controller
,
601 super
->active
->controller_section_offset
,
602 super
->active
->controller_section_length
,
604 super
->phys
= load_section(fd
, super
, NULL
,
605 super
->active
->phys_section_offset
,
606 super
->active
->phys_section_length
,
608 super
->pdsize
= __be32_to_cpu(super
->active
->phys_section_length
) * 512;
610 super
->virt
= load_section(fd
, super
, NULL
,
611 super
->active
->virt_section_offset
,
612 super
->active
->virt_section_length
,
614 super
->vdsize
= __be32_to_cpu(super
->active
->virt_section_length
) * 512;
624 super
->conflist
= NULL
;
627 super
->max_part
= __be16_to_cpu(super
->active
->max_partitions
);
628 super
->mppe
= __be16_to_cpu(super
->active
->max_primary_element_entries
);
629 super
->conf_rec_len
= __be16_to_cpu(super
->active
->config_record_len
);
633 static int load_ddf_local(int fd
, struct ddf_super
*super
,
634 char *devname
, int keep
)
641 int max_virt_disks
= __be16_to_cpu(super
->active
->max_vd_entries
);
642 unsigned long long dsize
;
644 /* First the local disk info */
645 posix_memalign((void**)&dl
, 512,
647 (super
->max_part
) * sizeof(dl
->vlist
[0]));
649 load_section(fd
, super
, &dl
->disk
,
650 super
->active
->data_section_offset
,
651 super
->active
->data_section_length
,
653 dl
->devname
= devname
? strdup(devname
) : NULL
;
656 dl
->major
= major(stb
.st_rdev
);
657 dl
->minor
= minor(stb
.st_rdev
);
658 dl
->next
= super
->dlist
;
659 dl
->fd
= keep
? fd
: -1;
662 if (get_dev_size(fd
, devname
, &dsize
))
663 dl
->size
= dsize
>> 9;
665 for (i
=0 ; i
< super
->max_part
; i
++)
669 for (i
=0; i
< __be16_to_cpu(super
->active
->max_pd_entries
); i
++)
670 if (memcmp(super
->phys
->entries
[i
].guid
,
671 dl
->disk
.guid
, DDF_GUID_LEN
) == 0)
674 /* Now the config list. */
675 /* 'conf' is an array of config entries, some of which are
676 * probably invalid. Those which are good need to be copied into
680 conf
= load_section(fd
, super
, NULL
,
681 super
->active
->config_section_offset
,
682 super
->active
->config_section_length
,
687 i
< __be32_to_cpu(super
->active
->config_section_length
);
688 i
+= super
->conf_rec_len
) {
689 struct vd_config
*vd
=
690 (struct vd_config
*)((char*)conf
+ i
*512);
693 if (vd
->magic
== DDF_SPARE_ASSIGN_MAGIC
) {
696 posix_memalign((void**)&dl
->spare
, 512,
697 super
->conf_rec_len
*512);
698 memcpy(dl
->spare
, vd
, super
->conf_rec_len
*512);
701 if (vd
->magic
!= DDF_VD_CONF_MAGIC
)
703 for (vcl
= super
->conflist
; vcl
; vcl
= vcl
->next
) {
704 if (memcmp(vcl
->conf
.guid
,
705 vd
->guid
, DDF_GUID_LEN
) == 0)
710 dl
->vlist
[vnum
++] = vcl
;
711 if (__be32_to_cpu(vd
->seqnum
) <=
712 __be32_to_cpu(vcl
->conf
.seqnum
))
715 posix_memalign((void**)&vcl
, 512,
716 (super
->conf_rec_len
*512 +
717 offsetof(struct vcl
, conf
)));
718 vcl
->next
= super
->conflist
;
719 vcl
->block_sizes
= NULL
; /* FIXME not for CONCAT */
720 super
->conflist
= vcl
;
721 dl
->vlist
[vnum
++] = vcl
;
723 memcpy(&vcl
->conf
, vd
, super
->conf_rec_len
*512);
724 vcl
->lba_offset
= (__u64
*)
725 &vcl
->conf
.phys_refnum
[super
->mppe
];
727 for (i
=0; i
< max_virt_disks
; i
++)
728 if (memcmp(super
->virt
->entries
[i
].guid
,
729 vcl
->conf
.guid
, DDF_GUID_LEN
)==0)
731 if (i
< max_virt_disks
)
740 static int load_super_ddf_all(struct supertype
*st
, int fd
,
741 void **sbp
, char *devname
, int keep_fd
);
743 static int load_super_ddf(struct supertype
*st
, int fd
,
746 unsigned long long dsize
;
747 struct ddf_super
*super
;
751 /* if 'fd' is a container, load metadata from all the devices */
752 if (load_super_ddf_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
756 return 1; /* FIXME Is this correct */
758 if (get_dev_size(fd
, devname
, &dsize
) == 0)
761 /* 32M is a lower bound */
762 if (dsize
<= 32*1024*1024) {
765 Name
": %s is too small for ddf: "
766 "size is %llu sectors.\n",
774 Name
": %s is an odd size for ddf: "
775 "size is %llu bytes.\n",
781 if (posix_memalign((void**)&super
, 512, sizeof(*super
))!= 0) {
782 fprintf(stderr
, Name
": malloc of %zu failed.\n",
786 memset(super
, 0, sizeof(*super
));
788 rv
= load_ddf_headers(fd
, super
, devname
);
794 /* Have valid headers and have chosen the best. Let's read in the rest*/
796 rv
= load_ddf_global(fd
, super
, devname
);
801 Name
": Failed to load all information "
802 "sections on %s\n", devname
);
807 load_ddf_local(fd
, super
, devname
, 0);
809 /* Should possibly check the sections .... */
812 if (st
->ss
== NULL
) {
814 st
->minor_version
= 0;
821 static void free_super_ddf(struct supertype
*st
)
823 struct ddf_super
*ddf
= st
->sb
;
828 while (ddf
->conflist
) {
829 struct vcl
*v
= ddf
->conflist
;
830 ddf
->conflist
= v
->next
;
832 free(v
->block_sizes
);
836 struct dl
*d
= ddf
->dlist
;
837 ddf
->dlist
= d
->next
;
848 static struct supertype
*match_metadata_desc_ddf(char *arg
)
850 /* 'ddf' only support containers */
851 struct supertype
*st
;
852 if (strcmp(arg
, "ddf") != 0 &&
853 strcmp(arg
, "default") != 0
857 st
= malloc(sizeof(*st
));
858 memset(st
, 0, sizeof(*st
));
861 st
->minor_version
= 0;
869 static mapping_t ddf_state
[] = {
875 { "Partially Optimal", 5},
881 static mapping_t ddf_init_state
[] = {
882 { "Not Initialised", 0},
883 { "QuickInit in Progress", 1},
884 { "Fully Initialised", 2},
888 static mapping_t ddf_access
[] = {
892 { "Blocked (no access)", 3},
896 static mapping_t ddf_level
[] = {
897 { "RAID0", DDF_RAID0
},
898 { "RAID1", DDF_RAID1
},
899 { "RAID3", DDF_RAID3
},
900 { "RAID4", DDF_RAID4
},
901 { "RAID5", DDF_RAID5
},
902 { "RAID1E",DDF_RAID1E
},
904 { "CONCAT",DDF_CONCAT
},
905 { "RAID5E",DDF_RAID5E
},
906 { "RAID5EE",DDF_RAID5EE
},
907 { "RAID6", DDF_RAID6
},
910 static mapping_t ddf_sec_level
[] = {
911 { "Striped", DDF_2STRIPED
},
912 { "Mirrored", DDF_2MIRRORED
},
913 { "Concat", DDF_2CONCAT
},
914 { "Spanned", DDF_2SPANNED
},
922 static struct num_mapping ddf_level_num
[] = {
925 { DDF_RAID3
, LEVEL_UNSUPPORTED
},
928 { DDF_RAID1E
, LEVEL_UNSUPPORTED
},
929 { DDF_JBOD
, LEVEL_UNSUPPORTED
},
930 { DDF_CONCAT
, LEVEL_LINEAR
},
931 { DDF_RAID5E
, LEVEL_UNSUPPORTED
},
932 { DDF_RAID5EE
, LEVEL_UNSUPPORTED
},
937 static int map_num1(struct num_mapping
*map
, int num
)
940 for (i
=0 ; map
[i
].num1
!= MAXINT
; i
++)
941 if (map
[i
].num1
== num
)
947 static void print_guid(char *guid
, int tstamp
)
949 /* A GUIDs are part (or all) ASCII and part binary.
950 * They tend to be space padded.
951 * We print the GUID in HEX, then in parentheses add
952 * any initial ASCII sequence, and a possible
953 * time stamp from bytes 16-19
955 int l
= DDF_GUID_LEN
;
958 for (i
=0 ; i
<DDF_GUID_LEN
; i
++) {
959 if ((i
&3)==0 && i
!= 0) printf(":");
960 printf("%02X", guid
[i
]&255);
964 while (l
&& guid
[l
-1] == ' ')
966 for (i
=0 ; i
<l
; i
++) {
967 if (guid
[i
] >= 0x20 && guid
[i
] < 0x7f)
968 fputc(guid
[i
], stdout
);
973 time_t then
= __be32_to_cpu(*(__u32
*)(guid
+16)) + DECADE
;
976 tm
= localtime(&then
);
977 strftime(tbuf
, 100, " %D %T",tm
);
983 static void examine_vd(int n
, struct ddf_super
*sb
, char *guid
)
985 int crl
= sb
->conf_rec_len
;
988 for (vcl
= sb
->conflist
; vcl
; vcl
= vcl
->next
) {
989 struct vd_config
*vc
= &vcl
->conf
;
991 if (calc_crc(vc
, crl
*512) != vc
->crc
)
993 if (memcmp(vc
->guid
, guid
, DDF_GUID_LEN
) != 0)
996 /* Ok, we know about this VD, let's give more details */
997 printf(" Raid Devices[%d] : %d\n", n
,
998 __be16_to_cpu(vc
->prim_elmnt_count
));
999 printf(" Chunk Size[%d] : %d sectors\n", n
,
1000 1 << vc
->chunk_shift
);
1001 printf(" Raid Level[%d] : %s\n", n
,
1002 map_num(ddf_level
, vc
->prl
)?:"-unknown-");
1003 if (vc
->sec_elmnt_count
!= 1) {
1004 printf(" Secondary Position[%d] : %d of %d\n", n
,
1005 vc
->sec_elmnt_seq
, vc
->sec_elmnt_count
);
1006 printf(" Secondary Level[%d] : %s\n", n
,
1007 map_num(ddf_sec_level
, vc
->srl
) ?: "-unknown-");
1009 printf(" Device Size[%d] : %llu\n", n
,
1010 __be64_to_cpu(vc
->blocks
)/2);
1011 printf(" Array Size[%d] : %llu\n", n
,
1012 __be64_to_cpu(vc
->array_blocks
)/2);
1016 static void examine_vds(struct ddf_super
*sb
)
1018 int cnt
= __be16_to_cpu(sb
->virt
->populated_vdes
);
1020 printf(" Virtual Disks : %d\n", cnt
);
1022 for (i
=0; i
<cnt
; i
++) {
1023 struct virtual_entry
*ve
= &sb
->virt
->entries
[i
];
1024 printf(" VD GUID[%d] : ", i
); print_guid(ve
->guid
, 1);
1026 printf(" unit[%d] : %d\n", i
, __be16_to_cpu(ve
->unit
));
1027 printf(" state[%d] : %s, %s%s\n", i
,
1028 map_num(ddf_state
, ve
->state
& 7),
1029 (ve
->state
& 8) ? "Morphing, ": "",
1030 (ve
->state
& 16)? "Not Consistent" : "Consistent");
1031 printf(" init state[%d] : %s\n", i
,
1032 map_num(ddf_init_state
, ve
->init_state
&3));
1033 printf(" access[%d] : %s\n", i
,
1034 map_num(ddf_access
, (ve
->init_state
>>6) & 3));
1035 printf(" Name[%d] : %.16s\n", i
, ve
->name
);
1036 examine_vd(i
, sb
, ve
->guid
);
1038 if (cnt
) printf("\n");
1041 static void examine_pds(struct ddf_super
*sb
)
1043 int cnt
= __be16_to_cpu(sb
->phys
->used_pdes
);
1046 printf(" Physical Disks : %d\n", cnt
);
1048 for (i
=0 ; i
<cnt
; i
++) {
1049 struct phys_disk_entry
*pd
= &sb
->phys
->entries
[i
];
1050 int type
= __be16_to_cpu(pd
->type
);
1051 int state
= __be16_to_cpu(pd
->state
);
1053 printf(" PD GUID[%d] : ", i
); print_guid(pd
->guid
, 0);
1055 printf(" ref[%d] : %08x\n", i
,
1056 __be32_to_cpu(pd
->refnum
));
1057 printf(" mode[%d] : %s%s%s%s%s\n", i
,
1058 (type
&2) ? "active":"",
1059 (type
&4) ? "Global Spare":"",
1060 (type
&8) ? "spare" : "",
1061 (type
&16)? ", foreign" : "",
1062 (type
&32)? "pass-through" : "");
1063 printf(" state[%d] : %s%s%s%s%s%s%s\n", i
,
1064 (state
&1)? "Online": "Offline",
1065 (state
&2)? ", Failed": "",
1066 (state
&4)? ", Rebuilding": "",
1067 (state
&8)? ", in-transition": "",
1068 (state
&16)? ", SMART errors": "",
1069 (state
&32)? ", Unrecovered Read Errors": "",
1070 (state
&64)? ", Missing" : "");
1071 printf(" Avail Size[%d] : %llu K\n", i
,
1072 __be64_to_cpu(pd
->config_size
)>>1);
1073 for (dl
= sb
->dlist
; dl
; dl
= dl
->next
) {
1074 if (dl
->disk
.refnum
== pd
->refnum
) {
1075 char *dv
= map_dev(dl
->major
, dl
->minor
, 0);
1077 printf(" Device[%d] : %s\n",
1085 static void examine_super_ddf(struct supertype
*st
, char *homehost
)
1087 struct ddf_super
*sb
= st
->sb
;
1089 printf(" Magic : %08x\n", __be32_to_cpu(sb
->anchor
.magic
));
1090 printf(" Version : %.8s\n", sb
->anchor
.revision
);
1091 printf("Controller GUID : "); print_guid(sb
->controller
.guid
, 0);
1093 printf(" Container GUID : "); print_guid(sb
->anchor
.guid
, 1);
1095 printf(" Seq : %08x\n", __be32_to_cpu(sb
->active
->seq
));
1096 printf(" Redundant hdr : %s\n", sb
->secondary
.magic
== DDF_HEADER_MAGIC
1102 static void brief_examine_super_ddf(struct supertype
*st
)
1104 /* We just write a generic DDF ARRAY entry
1105 * The uuid is all hex, 6 groups of 4 bytes
1107 struct ddf_super
*ddf
= st
->sb
;
1109 printf("ARRAY /dev/ddf metadata=ddf UUID=");
1110 for (i
= 0; i
< DDF_GUID_LEN
; i
++) {
1111 if ((i
&3) == 0 && i
!= 0)
1113 printf("%02X", 255&ddf
->anchor
.guid
[i
]);
1118 static void detail_super_ddf(struct supertype
*st
, char *homehost
)
1121 * Could print DDF GUID
1122 * Need to find which array
1123 * If whole, briefly list all arrays
1128 static void brief_detail_super_ddf(struct supertype
*st
)
1130 /* FIXME I really need to know which array we are detailing.
1131 * Can that be stored in ddf_super??
1133 // struct ddf_super *ddf = st->sb;
1137 static int match_home_ddf(struct supertype
*st
, char *homehost
)
1139 /* It matches 'this' host if the controller is a
1140 * Linux-MD controller with vendor_data matching
1143 struct ddf_super
*ddf
= st
->sb
;
1144 int len
= strlen(homehost
);
1146 return (memcmp(ddf
->controller
.guid
, T10
, 8) == 0 &&
1147 len
< sizeof(ddf
->controller
.vendor_data
) &&
1148 memcmp(ddf
->controller
.vendor_data
, homehost
,len
) == 0 &&
1149 ddf
->controller
.vendor_data
[len
] == 0);
1153 static struct vd_config
*find_vdcr(struct ddf_super
*ddf
, int inst
)
1157 for (v
= ddf
->conflist
; v
; v
= v
->next
)
1158 if (inst
== v
->vcnum
)
1164 static int find_phys(struct ddf_super
*ddf
, __u32 phys_refnum
)
1166 /* Find the entry in phys_disk which has the given refnum
1167 * and return it's index
1170 for (i
=0; i
< __be16_to_cpu(ddf
->phys
->max_pdes
); i
++)
1171 if (ddf
->phys
->entries
[i
].refnum
== phys_refnum
)
1176 static void uuid_from_super_ddf(struct supertype
*st
, int uuid
[4])
1178 /* The uuid returned here is used for:
1179 * uuid to put into bitmap file (Create, Grow)
1180 * uuid for backup header when saving critical section (Grow)
1181 * comparing uuids when re-adding a device into an array
1182 * For each of these we can make do with a truncated
1183 * or hashed uuid rather than the original, as long as
1185 * In each case the uuid required is that of the data-array,
1186 * not the device-set.
1187 * In the case of SVD we assume the BVD is of interest,
1188 * though that might be the case if a bitmap were made for
1189 * a mirrored SVD - worry about that later.
1190 * So we need to find the VD configuration record for the
1191 * relevant BVD and extract the GUID and Secondary_Element_Seq.
1192 * The first 16 bytes of the sha1 of these is used.
1194 struct ddf_super
*ddf
= st
->sb
;
1195 struct vcl
*vcl
= ddf
->currentconf
;
1198 memset(uuid
, 0, sizeof (uuid
));
1201 struct sha1_ctx ctx
;
1202 sha1_init_ctx(&ctx
);
1203 sha1_process_bytes(&vcl
->conf
.guid
, DDF_GUID_LEN
, &ctx
);
1204 if (vcl
->conf
.sec_elmnt_count
> 1)
1205 sha1_process_bytes(&vcl
->conf
.sec_elmnt_seq
, 1, &ctx
);
1206 sha1_finish_ctx(&ctx
, buf
);
1207 memcpy(uuid
, buf
, sizeof(uuid
));
1211 static void getinfo_super_ddf_bvd(struct supertype
*st
, struct mdinfo
*info
);
1213 static void getinfo_super_ddf(struct supertype
*st
, struct mdinfo
*info
)
1215 struct ddf_super
*ddf
= st
->sb
;
1217 if (ddf
->currentconf
) {
1218 getinfo_super_ddf_bvd(st
, info
);
1222 info
->array
.raid_disks
= __be16_to_cpu(ddf
->phys
->used_pdes
);
1223 info
->array
.level
= LEVEL_CONTAINER
;
1224 info
->array
.layout
= 0;
1225 info
->array
.md_minor
= -1;
1226 info
->array
.ctime
= DECADE
+ __be32_to_cpu(*(__u32
*)
1227 (ddf
->anchor
.guid
+16));
1228 info
->array
.utime
= 0;
1229 info
->array
.chunk_size
= 0;
1232 info
->disk
.major
= 0;
1233 info
->disk
.minor
= 0;
1235 info
->disk
.number
= __be32_to_cpu(ddf
->dlist
->disk
.refnum
);
1236 info
->disk
.raid_disk
= find_phys(ddf
, ddf
->dlist
->disk
.refnum
);
1238 info
->data_offset
= __be64_to_cpu(ddf
->phys
->
1239 entries
[info
->disk
.raid_disk
].
1241 info
->component_size
= ddf
->dlist
->size
- info
->data_offset
;
1243 info
->disk
.number
= -1;
1244 // info->disk.raid_disk = find refnum in the table and use index;
1246 info
->disk
.state
= (1 << MD_DISK_SYNC
);
1249 info
->reshape_active
= 0;
1251 strcpy(info
->text_version
, "ddf");
1252 info
->safe_mode_delay
= 0;
1254 // uuid_from_super_ddf(info->uuid, sbv);
1256 // info->name[] ?? ;
1259 static int rlq_to_layout(int rlq
, int prl
, int raiddisks
);
1261 static void getinfo_super_ddf_bvd(struct supertype
*st
, struct mdinfo
*info
)
1263 struct ddf_super
*ddf
= st
->sb
;
1264 struct vcl
*vc
= ddf
->currentconf
;
1265 int cd
= ddf
->currentdev
;
1267 /* FIXME this returns BVD info - what if we want SVD ?? */
1269 info
->array
.raid_disks
= __be16_to_cpu(vc
->conf
.prim_elmnt_count
);
1270 info
->array
.level
= map_num1(ddf_level_num
, vc
->conf
.prl
);
1271 info
->array
.layout
= rlq_to_layout(vc
->conf
.rlq
, vc
->conf
.prl
,
1272 info
->array
.raid_disks
);
1273 info
->array
.md_minor
= -1;
1274 info
->array
.ctime
= DECADE
+
1275 __be32_to_cpu(*(__u32
*)(vc
->conf
.guid
+16));
1276 info
->array
.utime
= DECADE
+ __be32_to_cpu(vc
->conf
.timestamp
);
1277 info
->array
.chunk_size
= 512 << vc
->conf
.chunk_shift
;
1279 if (cd
>= 0 && cd
< ddf
->mppe
) {
1280 info
->data_offset
= __be64_to_cpu(vc
->lba_offset
[cd
]);
1281 if (vc
->block_sizes
)
1282 info
->component_size
= vc
->block_sizes
[cd
];
1284 info
->component_size
= __be64_to_cpu(vc
->conf
.blocks
);
1287 info
->disk
.major
= 0;
1288 info
->disk
.minor
= 0;
1289 // info->disk.number = __be32_to_cpu(ddf->disk.refnum);
1290 // info->disk.raid_disk = find refnum in the table and use index;
1291 // info->disk.state = ???;
1293 info
->container_member
= ddf
->currentconf
->vcnum
;
1295 info
->resync_start
= 0;
1296 if (!(ddf
->virt
->entries
[info
->container_member
].state
1297 & DDF_state_inconsistent
) &&
1298 (ddf
->virt
->entries
[info
->container_member
].init_state
1299 & DDF_initstate_mask
)
1301 info
->resync_start
= ~0ULL;
1303 uuid_from_super_ddf(st
, info
->uuid
);
1305 info
->container_member
= atoi(st
->subarray
);
1306 sprintf(info
->text_version
, "/%s/%s",
1307 devnum2devname(st
->container_dev
),
1309 info
->safe_mode_delay
= 200;
1311 // info->name[] ?? ;
1315 static int update_super_ddf(struct supertype
*st
, struct mdinfo
*info
,
1317 char *devname
, int verbose
,
1318 int uuid_set
, char *homehost
)
1320 /* For 'assemble' and 'force' we need to return non-zero if any
1321 * change was made. For others, the return value is ignored.
1322 * Update options are:
1323 * force-one : This device looks a bit old but needs to be included,
1324 * update age info appropriately.
1325 * assemble: clear any 'faulty' flag to allow this device to
1327 * force-array: Array is degraded but being forced, mark it clean
1328 * if that will be needed to assemble it.
1330 * newdev: not used ????
1331 * grow: Array has gained a new device - this is currently for
1333 * resync: mark as dirty so a resync will happen.
1334 * uuid: Change the uuid of the array to match what is given
1335 * homehost: update the recorded homehost
1336 * name: update the name - preserving the homehost
1337 * _reshape_progress: record new reshape_progress position.
1339 * Following are not relevant for this version:
1340 * sparc2.2 : update from old dodgey metadata
1341 * super-minor: change the preferred_minor number
1342 * summaries: update redundant counters.
1345 // struct ddf_super *ddf = st->sb;
1346 // struct vd_config *vd = find_vdcr(ddf, info->container_member);
1347 // struct virtual_entry *ve = find_ve(ddf);
1349 /* we don't need to handle "force-*" or "assemble" as
1350 * there is no need to 'trick' the kernel. We the metadata is
1351 * first updated to activate the array, all the implied modifications
1355 if (strcmp(update
, "grow") == 0) {
1358 if (strcmp(update
, "resync") == 0) {
1359 // info->resync_checkpoint = 0;
1361 /* We ignore UUID updates as they make even less sense
1364 if (strcmp(update
, "homehost") == 0) {
1365 /* homehost is stored in controller->vendor_data,
1366 * or it is when we are the vendor
1368 // if (info->vendor_is_local)
1369 // strcpy(ddf->controller.vendor_data, homehost);
1371 if (strcmp(update
, "name") == 0) {
1372 /* name is stored in virtual_entry->name */
1373 // memset(ve->name, ' ', 16);
1374 // strncpy(ve->name, info->name, 16);
1376 if (strcmp(update
, "_reshape_progress") == 0) {
1377 /* We don't support reshape yet */
1380 // update_all_csum(ddf);
1385 static void make_header_guid(char *guid
)
1389 /* Create a DDF Header of Virtual Disk GUID */
1391 /* 24 bytes of fiction required.
1392 * first 8 are a 'vendor-id' - "Linux-MD"
1393 * next 8 are controller type.. how about 0X DEAD BEEF 0000 0000
1394 * Remaining 8 random number plus timestamp
1396 memcpy(guid
, T10
, sizeof(T10
));
1397 stamp
= __cpu_to_be32(0xdeadbeef);
1398 memcpy(guid
+8, &stamp
, 4);
1399 stamp
= __cpu_to_be32(0);
1400 memcpy(guid
+12, &stamp
, 4);
1401 stamp
= __cpu_to_be32(time(0) - DECADE
);
1402 memcpy(guid
+16, &stamp
, 4);
1403 rfd
= open("/dev/urandom", O_RDONLY
);
1404 if (rfd
< 0 || read(rfd
, &stamp
, 4) != 4)
1406 memcpy(guid
+20, &stamp
, 4);
1407 if (rfd
>= 0) close(rfd
);
1410 static int init_super_ddf_bvd(struct supertype
*st
,
1411 mdu_array_info_t
*info
,
1412 unsigned long long size
,
1413 char *name
, char *homehost
,
1416 static int init_super_ddf(struct supertype
*st
,
1417 mdu_array_info_t
*info
,
1418 unsigned long long size
, char *name
, char *homehost
,
1421 /* This is primarily called by Create when creating a new array.
1422 * We will then get add_to_super called for each component, and then
1423 * write_init_super called to write it out to each device.
1424 * For DDF, Create can create on fresh devices or on a pre-existing
1426 * To create on a pre-existing array a different method will be called.
1427 * This one is just for fresh drives.
1429 * We need to create the entire 'ddf' structure which includes:
1430 * DDF headers - these are easy.
1431 * Controller data - a Sector describing this controller .. not that
1432 * this is a controller exactly.
1433 * Physical Disk Record - one entry per device, so
1434 * leave plenty of space.
1435 * Virtual Disk Records - again, just leave plenty of space.
1436 * This just lists VDs, doesn't give details
1437 * Config records - describes the VDs that use this disk
1438 * DiskData - describes 'this' device.
1439 * BadBlockManagement - empty
1440 * Diag Space - empty
1441 * Vendor Logs - Could we put bitmaps here?
1444 struct ddf_super
*ddf
;
1447 int max_phys_disks
, max_virt_disks
;
1448 unsigned long long sector
;
1452 struct phys_disk
*pd
;
1453 struct virtual_disk
*vd
;
1460 return init_super_ddf_bvd(st
, info
, size
, name
, homehost
,
1463 posix_memalign((void**)&ddf
, 512, sizeof(*ddf
));
1464 memset(ddf
, 0, sizeof(*ddf
));
1465 ddf
->dlist
= NULL
; /* no physical disks yet */
1466 ddf
->conflist
= NULL
; /* No virtual disks yet */
1468 /* At least 32MB *must* be reserved for the ddf. So let's just
1469 * start 32MB from the end, and put the primary header there.
1470 * Don't do secondary for now.
1471 * We don't know exactly where that will be yet as it could be
1472 * different on each device. To just set up the lengths.
1476 ddf
->anchor
.magic
= DDF_HEADER_MAGIC
;
1477 make_header_guid(ddf
->anchor
.guid
);
1479 memcpy(ddf
->anchor
.revision
, DDF_REVISION_2
, 8);
1480 ddf
->anchor
.seq
= __cpu_to_be32(1);
1481 ddf
->anchor
.timestamp
= __cpu_to_be32(time(0) - DECADE
);
1482 ddf
->anchor
.openflag
= 0xFF;
1483 ddf
->anchor
.foreignflag
= 0;
1484 ddf
->anchor
.enforcegroups
= 0; /* Is this best?? */
1485 ddf
->anchor
.pad0
= 0xff;
1486 memset(ddf
->anchor
.pad1
, 0xff, 12);
1487 memset(ddf
->anchor
.header_ext
, 0xff, 32);
1488 ddf
->anchor
.primary_lba
= ~(__u64
)0;
1489 ddf
->anchor
.secondary_lba
= ~(__u64
)0;
1490 ddf
->anchor
.type
= DDF_HEADER_ANCHOR
;
1491 memset(ddf
->anchor
.pad2
, 0xff, 3);
1492 ddf
->anchor
.workspace_len
= __cpu_to_be32(32768); /* Must be reserved */
1493 ddf
->anchor
.workspace_lba
= ~(__u64
)0; /* Put this at bottom
1494 of 32M reserved.. */
1495 max_phys_disks
= 1023; /* Should be enough */
1496 ddf
->anchor
.max_pd_entries
= __cpu_to_be16(max_phys_disks
);
1497 max_virt_disks
= 255;
1498 ddf
->anchor
.max_vd_entries
= __cpu_to_be16(max_virt_disks
); /* ?? */
1499 ddf
->anchor
.max_partitions
= __cpu_to_be16(64); /* ?? */
1502 ddf
->conf_rec_len
= 1 + ROUND_UP(ddf
->mppe
* (4+8), 512)/512;
1503 ddf
->anchor
.config_record_len
= __cpu_to_be16(ddf
->conf_rec_len
);
1504 ddf
->anchor
.max_primary_element_entries
= __cpu_to_be16(ddf
->mppe
);
1505 memset(ddf
->anchor
.pad3
, 0xff, 54);
1506 /* controller sections is one sector long immediately
1507 * after the ddf header */
1509 ddf
->anchor
.controller_section_offset
= __cpu_to_be32(sector
);
1510 ddf
->anchor
.controller_section_length
= __cpu_to_be32(1);
1513 /* phys is 8 sectors after that */
1514 pdsize
= ROUND_UP(sizeof(struct phys_disk
) +
1515 sizeof(struct phys_disk_entry
)*max_phys_disks
,
1517 switch(pdsize
/512) {
1518 case 2: case 8: case 32: case 128: case 512: break;
1521 ddf
->anchor
.phys_section_offset
= __cpu_to_be32(sector
);
1522 ddf
->anchor
.phys_section_length
=
1523 __cpu_to_be32(pdsize
/512); /* max_primary_element_entries/8 */
1524 sector
+= pdsize
/512;
1526 /* virt is another 32 sectors */
1527 vdsize
= ROUND_UP(sizeof(struct virtual_disk
) +
1528 sizeof(struct virtual_entry
) * max_virt_disks
,
1530 switch(vdsize
/512) {
1531 case 2: case 8: case 32: case 128: case 512: break;
1534 ddf
->anchor
.virt_section_offset
= __cpu_to_be32(sector
);
1535 ddf
->anchor
.virt_section_length
=
1536 __cpu_to_be32(vdsize
/512); /* max_vd_entries/8 */
1537 sector
+= vdsize
/512;
1539 clen
= ddf
->conf_rec_len
* (ddf
->max_part
+1);
1540 ddf
->anchor
.config_section_offset
= __cpu_to_be32(sector
);
1541 ddf
->anchor
.config_section_length
= __cpu_to_be32(clen
);
1544 ddf
->anchor
.data_section_offset
= __cpu_to_be32(sector
);
1545 ddf
->anchor
.data_section_length
= __cpu_to_be32(1);
1548 ddf
->anchor
.bbm_section_length
= __cpu_to_be32(0);
1549 ddf
->anchor
.bbm_section_offset
= __cpu_to_be32(0xFFFFFFFF);
1550 ddf
->anchor
.diag_space_length
= __cpu_to_be32(0);
1551 ddf
->anchor
.diag_space_offset
= __cpu_to_be32(0xFFFFFFFF);
1552 ddf
->anchor
.vendor_length
= __cpu_to_be32(0);
1553 ddf
->anchor
.vendor_offset
= __cpu_to_be32(0xFFFFFFFF);
1555 memset(ddf
->anchor
.pad4
, 0xff, 256);
1557 memcpy(&ddf
->primary
, &ddf
->anchor
, 512);
1558 memcpy(&ddf
->secondary
, &ddf
->anchor
, 512);
1560 ddf
->primary
.openflag
= 1; /* I guess.. */
1561 ddf
->primary
.type
= DDF_HEADER_PRIMARY
;
1563 ddf
->secondary
.openflag
= 1; /* I guess.. */
1564 ddf
->secondary
.type
= DDF_HEADER_SECONDARY
;
1566 ddf
->active
= &ddf
->primary
;
1568 ddf
->controller
.magic
= DDF_CONTROLLER_MAGIC
;
1570 /* 24 more bytes of fiction required.
1571 * first 8 are a 'vendor-id' - "Linux-MD"
1572 * Remaining 16 are serial number.... maybe a hostname would do?
1574 memcpy(ddf
->controller
.guid
, T10
, sizeof(T10
));
1575 gethostname(hostname
, sizeof(hostname
));
1576 hostname
[sizeof(hostname
) - 1] = 0;
1577 hostlen
= strlen(hostname
);
1578 memcpy(ddf
->controller
.guid
+ 24 - hostlen
, hostname
, hostlen
);
1579 for (i
= strlen(T10
) ; i
+hostlen
< 24; i
++)
1580 ddf
->controller
.guid
[i
] = ' ';
1582 ddf
->controller
.type
.vendor_id
= __cpu_to_be16(0xDEAD);
1583 ddf
->controller
.type
.device_id
= __cpu_to_be16(0xBEEF);
1584 ddf
->controller
.type
.sub_vendor_id
= 0;
1585 ddf
->controller
.type
.sub_device_id
= 0;
1586 memcpy(ddf
->controller
.product_id
, "What Is My PID??", 16);
1587 memset(ddf
->controller
.pad
, 0xff, 8);
1588 memset(ddf
->controller
.vendor_data
, 0xff, 448);
1590 posix_memalign((void**)&pd
, 512, pdsize
);
1592 ddf
->pdsize
= pdsize
;
1594 memset(pd
, 0xff, pdsize
);
1595 memset(pd
, 0, sizeof(*pd
));
1596 pd
->magic
= DDF_PHYS_DATA_MAGIC
;
1597 pd
->used_pdes
= __cpu_to_be16(0);
1598 pd
->max_pdes
= __cpu_to_be16(max_phys_disks
);
1599 memset(pd
->pad
, 0xff, 52);
1601 posix_memalign((void**)&vd
, 512, vdsize
);
1603 ddf
->vdsize
= vdsize
;
1604 memset(vd
, 0, vdsize
);
1605 vd
->magic
= DDF_VIRT_RECORDS_MAGIC
;
1606 vd
->populated_vdes
= __cpu_to_be16(0);
1607 vd
->max_vdes
= __cpu_to_be16(max_virt_disks
);
1608 memset(vd
->pad
, 0xff, 52);
1610 for (i
=0; i
<max_virt_disks
; i
++)
1611 memset(&vd
->entries
[i
], 0xff, sizeof(struct virtual_entry
));
1614 ddf
->updates_pending
= 1;
1618 static int all_ff(char *guid
)
1621 for (i
= 0; i
< DDF_GUID_LEN
; i
++)
1622 if (guid
[i
] != (char)0xff)
1626 static int chunk_to_shift(int chunksize
)
1628 return ffs(chunksize
/512)-1;
1631 static int level_to_prl(int level
)
1634 case LEVEL_LINEAR
: return DDF_CONCAT
;
1635 case 0: return DDF_RAID0
;
1636 case 1: return DDF_RAID1
;
1637 case 4: return DDF_RAID4
;
1638 case 5: return DDF_RAID5
;
1639 case 6: return DDF_RAID6
;
1643 static int layout_to_rlq(int level
, int layout
, int raiddisks
)
1647 return DDF_RAID0_SIMPLE
;
1650 case 2: return DDF_RAID1_SIMPLE
;
1651 case 3: return DDF_RAID1_MULTI
;
1656 case 0: return DDF_RAID4_N
;
1662 case ALGORITHM_LEFT_ASYMMETRIC
:
1663 return DDF_RAID5_N_RESTART
;
1664 case ALGORITHM_RIGHT_ASYMMETRIC
:
1666 return DDF_RAID5_0_RESTART
;
1668 return DDF_RAID6_0_RESTART
;
1669 case ALGORITHM_LEFT_SYMMETRIC
:
1670 return DDF_RAID5_N_CONTINUE
;
1671 case ALGORITHM_RIGHT_SYMMETRIC
:
1672 return -1; /* not mentioned in standard */
1678 static int rlq_to_layout(int rlq
, int prl
, int raiddisks
)
1682 return 0; /* hopefully rlq == DDF_RAID0_SIMPLE */
1684 return 0; /* hopefully rlq == SIMPLE or MULTI depending
1692 return -1; /* FIXME this isn't checked */
1696 case DDF_RAID5_N_RESTART
:
1697 return ALGORITHM_LEFT_ASYMMETRIC
;
1698 case DDF_RAID5_0_RESTART
:
1699 return ALGORITHM_RIGHT_ASYMMETRIC
;
1700 case DDF_RAID5_N_CONTINUE
:
1701 return ALGORITHM_LEFT_SYMMETRIC
;
1707 case DDF_RAID5_N_RESTART
:
1708 return ALGORITHM_LEFT_ASYMMETRIC
;
1709 case DDF_RAID6_0_RESTART
:
1710 return ALGORITHM_RIGHT_ASYMMETRIC
;
1711 case DDF_RAID5_N_CONTINUE
:
1712 return ALGORITHM_LEFT_SYMMETRIC
;
1722 unsigned long long start
, size
;
1724 static int cmp_extent(const void *av
, const void *bv
)
1726 const struct extent
*a
= av
;
1727 const struct extent
*b
= bv
;
1728 if (a
->start
< b
->start
)
1730 if (a
->start
> b
->start
)
1735 static struct extent
*get_extents(struct ddf_super
*ddf
, struct dl
*dl
)
1737 /* find a list of used extents on the give physical device
1738 * (dnum) of the given ddf.
1739 * Return a malloced array of 'struct extent'
1741 FIXME ignore DDF_Legacy devices?
1748 rv
= malloc(sizeof(struct extent
) * (ddf
->max_part
+ 2));
1752 for (i
= 0; i
< ddf
->max_part
; i
++) {
1753 struct vcl
*v
= dl
->vlist
[i
];
1756 for (j
=0; j
< v
->conf
.prim_elmnt_count
; j
++)
1757 if (v
->conf
.phys_refnum
[j
] == dl
->disk
.refnum
) {
1758 /* This device plays role 'j' in 'v'. */
1759 rv
[n
].start
= __be64_to_cpu(v
->lba_offset
[j
]);
1760 rv
[n
].size
= __be64_to_cpu(v
->conf
.blocks
);
1765 qsort(rv
, n
, sizeof(*rv
), cmp_extent
);
1767 rv
[n
].start
= __be64_to_cpu(ddf
->phys
->entries
[dl
->pdnum
].config_size
);
1773 static int init_super_ddf_bvd(struct supertype
*st
,
1774 mdu_array_info_t
*info
,
1775 unsigned long long size
,
1776 char *name
, char *homehost
,
1779 /* We are creating a BVD inside a pre-existing container.
1780 * so st->sb is already set.
1781 * We need to create a new vd_config and a new virtual_entry
1783 struct ddf_super
*ddf
= st
->sb
;
1785 struct virtual_entry
*ve
;
1787 struct vd_config
*vc
;
1789 if (__be16_to_cpu(ddf
->virt
->populated_vdes
)
1790 >= __be16_to_cpu(ddf
->virt
->max_vdes
)) {
1791 fprintf(stderr
, Name
": This ddf already has the "
1792 "maximum of %d virtual devices\n",
1793 __be16_to_cpu(ddf
->virt
->max_vdes
));
1797 for (venum
= 0; venum
< __be16_to_cpu(ddf
->virt
->max_vdes
); venum
++)
1798 if (all_ff(ddf
->virt
->entries
[venum
].guid
))
1800 if (venum
== __be16_to_cpu(ddf
->virt
->max_vdes
)) {
1801 fprintf(stderr
, Name
": Cannot find spare slot for "
1802 "virtual disk - DDF is corrupt\n");
1805 ve
= &ddf
->virt
->entries
[venum
];
1807 /* A Virtual Disk GUID contains the T10 Vendor ID, controller type,
1808 * timestamp, random number
1810 make_header_guid(ve
->guid
);
1811 ve
->unit
= __cpu_to_be16(info
->md_minor
);
1813 ve
->guid_crc
= crc32(0, (unsigned char*)ddf
->anchor
.guid
, DDF_GUID_LEN
);
1815 ve
->state
= DDF_state_degraded
; /* Will be modified as devices are added */
1816 if (info
->state
& 1) /* clean */
1817 ve
->init_state
= DDF_init_full
;
1819 ve
->init_state
= DDF_init_not
;
1821 memset(ve
->pad1
, 0xff, 14);
1822 memset(ve
->name
, ' ', 16);
1824 strncpy(ve
->name
, name
, 16);
1825 ddf
->virt
->populated_vdes
=
1826 __cpu_to_be16(__be16_to_cpu(ddf
->virt
->populated_vdes
)+1);
1828 /* Now create a new vd_config */
1829 posix_memalign((void**)&vcl
, 512,
1830 (offsetof(struct vcl
, conf
) + ddf
->conf_rec_len
* 512));
1831 vcl
->lba_offset
= (__u64
*) &vcl
->conf
.phys_refnum
[ddf
->mppe
];
1833 sprintf(st
->subarray
, "%d", venum
);
1834 vcl
->block_sizes
= NULL
; /* FIXME not for CONCAT */
1838 vc
->magic
= DDF_VD_CONF_MAGIC
;
1839 memcpy(vc
->guid
, ve
->guid
, DDF_GUID_LEN
);
1840 vc
->timestamp
= __cpu_to_be32(time(0)-DECADE
);
1841 vc
->seqnum
= __cpu_to_be32(1);
1842 memset(vc
->pad0
, 0xff, 24);
1843 vc
->prim_elmnt_count
= __cpu_to_be16(info
->raid_disks
);
1844 vc
->chunk_shift
= chunk_to_shift(info
->chunk_size
);
1845 vc
->prl
= level_to_prl(info
->level
);
1846 vc
->rlq
= layout_to_rlq(info
->level
, info
->layout
, info
->raid_disks
);
1847 vc
->sec_elmnt_count
= 1;
1848 vc
->sec_elmnt_seq
= 0;
1850 vc
->blocks
= __cpu_to_be64(info
->size
* 2);
1851 vc
->array_blocks
= __cpu_to_be64(
1852 calc_array_size(info
->level
, info
->raid_disks
, info
->layout
,
1853 info
->chunk_size
, info
->size
*2));
1854 memset(vc
->pad1
, 0xff, 8);
1855 vc
->spare_refs
[0] = 0xffffffff;
1856 vc
->spare_refs
[1] = 0xffffffff;
1857 vc
->spare_refs
[2] = 0xffffffff;
1858 vc
->spare_refs
[3] = 0xffffffff;
1859 vc
->spare_refs
[4] = 0xffffffff;
1860 vc
->spare_refs
[5] = 0xffffffff;
1861 vc
->spare_refs
[6] = 0xffffffff;
1862 vc
->spare_refs
[7] = 0xffffffff;
1863 memset(vc
->cache_pol
, 0, 8);
1865 memset(vc
->pad2
, 0xff, 3);
1866 memset(vc
->pad3
, 0xff, 52);
1867 memset(vc
->pad4
, 0xff, 192);
1868 memset(vc
->v0
, 0xff, 32);
1869 memset(vc
->v1
, 0xff, 32);
1870 memset(vc
->v2
, 0xff, 16);
1871 memset(vc
->v3
, 0xff, 16);
1872 memset(vc
->vendor
, 0xff, 32);
1874 memset(vc
->phys_refnum
, 0xff, 4*ddf
->mppe
);
1875 memset(vc
->phys_refnum
+(ddf
->mppe
* 4), 0x00, 8*ddf
->mppe
);
1877 vcl
->next
= ddf
->conflist
;
1878 ddf
->conflist
= vcl
;
1879 ddf
->currentconf
= vcl
;
1880 ddf
->updates_pending
= 1;
1885 static void add_to_super_ddf_bvd(struct supertype
*st
,
1886 mdu_disk_info_t
*dk
, int fd
, char *devname
)
1888 /* fd and devname identify a device with-in the ddf container (st).
1889 * dk identifies a location in the new BVD.
1890 * We need to find suitable free space in that device and update
1891 * the phys_refnum and lba_offset for the newly created vd_config.
1892 * We might also want to update the type in the phys_disk
1896 struct ddf_super
*ddf
= st
->sb
;
1897 struct vd_config
*vc
;
1901 unsigned long long blocks
, pos
, esize
;
1904 for (dl
= ddf
->dlist
; dl
; dl
= dl
->next
)
1905 if (dl
->major
== dk
->major
&&
1906 dl
->minor
== dk
->minor
)
1908 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1911 vc
= &ddf
->currentconf
->conf
;
1912 lba_offset
= ddf
->currentconf
->lba_offset
;
1914 ex
= get_extents(ddf
, dl
);
1919 blocks
= __be64_to_cpu(vc
->blocks
);
1920 if (ddf
->currentconf
->block_sizes
)
1921 blocks
= ddf
->currentconf
->block_sizes
[dk
->raid_disk
];
1924 esize
= ex
[i
].start
- pos
;
1925 if (esize
>= blocks
)
1927 pos
= ex
[i
].start
+ ex
[i
].size
;
1929 } while (ex
[i
-1].size
);
1935 ddf
->currentdev
= dk
->raid_disk
;
1936 vc
->phys_refnum
[dk
->raid_disk
] = dl
->disk
.refnum
;
1937 lba_offset
[dk
->raid_disk
] = __cpu_to_be64(pos
);
1939 for (i
=0; i
< ddf
->max_part
; i
++)
1940 if (dl
->vlist
[i
] == NULL
)
1942 if (i
== ddf
->max_part
)
1944 dl
->vlist
[i
] = ddf
->currentconf
;
1947 dl
->devname
= devname
;
1949 /* Check how many working raid_disks, and if we can mark
1950 * array as optimal yet
1954 for (i
=0; i
< __be16_to_cpu(vc
->prim_elmnt_count
); i
++)
1955 if (vc
->phys_refnum
[i
] != 0xffffffff)
1958 /* Find which virtual_entry */
1959 i
= ddf
->currentconf
->vcnum
;
1960 if (working
== __be16_to_cpu(vc
->prim_elmnt_count
))
1961 ddf
->virt
->entries
[i
].state
=
1962 (ddf
->virt
->entries
[i
].state
& ~DDF_state_mask
)
1963 | DDF_state_optimal
;
1965 if (vc
->prl
== DDF_RAID6
&&
1966 working
+1 == __be16_to_cpu(vc
->prim_elmnt_count
))
1967 ddf
->virt
->entries
[i
].state
=
1968 (ddf
->virt
->entries
[i
].state
& ~DDF_state_mask
)
1969 | DDF_state_part_optimal
;
1971 ddf
->phys
->entries
[dl
->pdnum
].type
&= ~__cpu_to_be16(DDF_Global_Spare
);
1972 ddf
->phys
->entries
[dl
->pdnum
].type
|= __cpu_to_be16(DDF_Active_in_VD
);
1973 ddf
->updates_pending
= 1;
1976 /* add a device to a container, either while creating it or while
1977 * expanding a pre-existing container
1979 static void add_to_super_ddf(struct supertype
*st
,
1980 mdu_disk_info_t
*dk
, int fd
, char *devname
)
1982 struct ddf_super
*ddf
= st
->sb
;
1986 unsigned long long size
;
1987 struct phys_disk_entry
*pde
;
1991 if (ddf
->currentconf
) {
1992 add_to_super_ddf_bvd(st
, dk
, fd
, devname
);
1996 /* This is device numbered dk->number. We need to create
1997 * a phys_disk entry and a more detailed disk_data entry.
2000 posix_memalign((void**)&dd
, 512,
2001 sizeof(*dd
) + sizeof(dd
->vlist
[0]) * ddf
->max_part
);
2002 dd
->major
= major(stb
.st_rdev
);
2003 dd
->minor
= minor(stb
.st_rdev
);
2004 dd
->devname
= devname
;
2008 dd
->disk
.magic
= DDF_PHYS_DATA_MAGIC
;
2010 tm
= localtime(&now
);
2011 sprintf(dd
->disk
.guid
, "%8s%04d%02d%02d",
2012 T10
, tm
->tm_year
+1900, tm
->tm_mon
+1, tm
->tm_mday
);
2013 *(__u32
*)(dd
->disk
.guid
+ 16) = random();
2014 *(__u32
*)(dd
->disk
.guid
+ 20) = random();
2017 /* Cannot be bothered finding a CRC of some irrelevant details*/
2018 dd
->disk
.refnum
= random();
2019 for (i
= __be16_to_cpu(ddf
->active
->max_pd_entries
) - 1;
2021 if (ddf
->phys
->entries
[i
].refnum
== dd
->disk
.refnum
)
2025 dd
->disk
.forced_ref
= 1;
2026 dd
->disk
.forced_guid
= 1;
2027 memset(dd
->disk
.vendor
, ' ', 32);
2028 memcpy(dd
->disk
.vendor
, "Linux", 5);
2029 memset(dd
->disk
.pad
, 0xff, 442);
2030 for (i
= 0; i
< ddf
->max_part
; i
++)
2031 dd
->vlist
[i
] = NULL
;
2033 n
= __be16_to_cpu(ddf
->phys
->used_pdes
);
2034 pde
= &ddf
->phys
->entries
[n
];
2037 if (st
->update_tail
) {
2038 int len
= (sizeof(struct phys_disk
) +
2039 sizeof(struct phys_disk_entry
));
2040 struct phys_disk
*pd
;
2043 pd
->magic
= DDF_PHYS_RECORDS_MAGIC
;
2044 pd
->used_pdes
= __cpu_to_be16(n
);
2045 pde
= &pd
->entries
[0];
2049 ddf
->phys
->used_pdes
= __cpu_to_be16(n
);
2052 memcpy(pde
->guid
, dd
->disk
.guid
, DDF_GUID_LEN
);
2053 pde
->refnum
= dd
->disk
.refnum
;
2054 pde
->type
= __cpu_to_be16(DDF_Forced_PD_GUID
| DDF_Global_Spare
);
2055 pde
->state
= __cpu_to_be16(DDF_Online
);
2056 get_dev_size(fd
, NULL
, &size
);
2057 /* We are required to reserve 32Meg, and record the size in sectors */
2058 pde
->config_size
= __cpu_to_be64( (size
- 32*1024*1024) / 512);
2059 sprintf(pde
->path
, "%17.17s","Information: nil") ;
2060 memset(pde
->pad
, 0xff, 6);
2062 dd
->size
= size
>> 9;
2063 if (st
->update_tail
) {
2064 dd
->next
= ddf
->add_list
;
2067 dd
->next
= ddf
->dlist
;
2069 ddf
->updates_pending
= 1;
2074 * This is the write_init_super method for a ddf container. It is
2075 * called when creating a container or adding another device to a
2079 static unsigned char null_conf
[4096+512];
2081 static int __write_init_super_ddf(struct supertype
*st
, int do_close
)
2084 struct ddf_super
*ddf
= st
->sb
;
2090 unsigned long long size
, sector
;
2092 for (d
= ddf
->dlist
; d
; d
=d
->next
) {
2098 /* We need to fill in the primary, (secondary) and workspace
2099 * lba's in the headers, set their checksums,
2100 * Also checksum phys, virt....
2102 * Then write everything out, finally the anchor is written.
2104 get_dev_size(fd
, NULL
, &size
);
2106 ddf
->anchor
.workspace_lba
= __cpu_to_be64(size
- 32*1024*2);
2107 ddf
->anchor
.primary_lba
= __cpu_to_be64(size
- 16*1024*2);
2108 ddf
->anchor
.seq
= __cpu_to_be32(1);
2109 memcpy(&ddf
->primary
, &ddf
->anchor
, 512);
2110 memcpy(&ddf
->secondary
, &ddf
->anchor
, 512);
2112 ddf
->anchor
.openflag
= 0xFF; /* 'open' means nothing */
2113 ddf
->anchor
.seq
= 0xFFFFFFFF; /* no sequencing in anchor */
2114 ddf
->anchor
.crc
= calc_crc(&ddf
->anchor
, 512);
2116 ddf
->primary
.openflag
= 0;
2117 ddf
->primary
.type
= DDF_HEADER_PRIMARY
;
2119 ddf
->secondary
.openflag
= 0;
2120 ddf
->secondary
.type
= DDF_HEADER_SECONDARY
;
2122 ddf
->primary
.crc
= calc_crc(&ddf
->primary
, 512);
2123 ddf
->secondary
.crc
= calc_crc(&ddf
->secondary
, 512);
2125 sector
= size
- 16*1024*2;
2126 lseek64(fd
, sector
<<9, 0);
2127 write(fd
, &ddf
->primary
, 512);
2129 ddf
->controller
.crc
= calc_crc(&ddf
->controller
, 512);
2130 write(fd
, &ddf
->controller
, 512);
2132 ddf
->phys
->crc
= calc_crc(ddf
->phys
, ddf
->pdsize
);
2134 write(fd
, ddf
->phys
, ddf
->pdsize
);
2136 ddf
->virt
->crc
= calc_crc(ddf
->virt
, ddf
->vdsize
);
2137 write(fd
, ddf
->virt
, ddf
->vdsize
);
2139 /* Now write lots of config records. */
2140 n_config
= ddf
->max_part
;
2141 conf_size
= ddf
->conf_rec_len
* 512;
2142 for (i
= 0 ; i
<= n_config
; i
++) {
2143 struct vcl
*c
= d
->vlist
[i
];
2145 c
= (struct vcl
*)d
->spare
;
2148 c
->conf
.crc
= calc_crc(&c
->conf
, conf_size
);
2149 write(fd
, &c
->conf
, conf_size
);
2151 char *null_aligned
= (char*)((((unsigned long)null_conf
)+511)&~511UL);
2152 if (null_conf
[0] != 0xff)
2153 memset(null_conf
, 0xff, sizeof(null_conf
));
2154 int togo
= conf_size
;
2155 while (togo
> sizeof(null_conf
)-512) {
2156 write(fd
, null_aligned
, sizeof(null_conf
)-512);
2157 togo
-= sizeof(null_conf
)-512;
2159 write(fd
, null_aligned
, togo
);
2162 d
->disk
.crc
= calc_crc(&d
->disk
, 512);
2163 write(fd
, &d
->disk
, 512);
2165 /* Maybe do the same for secondary */
2167 lseek64(fd
, (size
-1)*512, SEEK_SET
);
2168 write(fd
, &ddf
->anchor
, 512);
2177 static int write_init_super_ddf(struct supertype
*st
)
2180 if (st
->update_tail
) {
2181 /* queue the virtual_disk and vd_config as metadata updates */
2182 struct virtual_disk
*vd
;
2183 struct vd_config
*vc
;
2184 struct ddf_super
*ddf
= st
->sb
;
2187 if (!ddf
->currentconf
) {
2188 int len
= (sizeof(struct phys_disk
) +
2189 sizeof(struct phys_disk_entry
));
2191 /* adding a disk to the container. */
2195 append_metadata_update(st
, ddf
->add_list
->mdupdate
, len
);
2196 ddf
->add_list
->mdupdate
= NULL
;
2200 /* Newly created VD */
2202 /* First the virtual disk. We have a slightly fake header */
2203 len
= sizeof(struct virtual_disk
) + sizeof(struct virtual_entry
);
2206 vd
->entries
[0] = ddf
->virt
->entries
[ddf
->currentconf
->vcnum
];
2207 vd
->populated_vdes
= __cpu_to_be16(ddf
->currentconf
->vcnum
);
2208 append_metadata_update(st
, vd
, len
);
2210 /* Then the vd_config */
2211 len
= ddf
->conf_rec_len
* 512;
2213 memcpy(vc
, &ddf
->currentconf
->conf
, len
);
2214 append_metadata_update(st
, vc
, len
);
2216 /* FIXME I need to close the fds! */
2219 return __write_init_super_ddf(st
, 1);
2224 static __u64
avail_size_ddf(struct supertype
*st
, __u64 devsize
)
2226 /* We must reserve the last 32Meg */
2227 if (devsize
<= 32*1024*2)
2229 return devsize
- 32*1024*2;
2234 validate_geometry_ddf_container(struct supertype
*st
,
2235 int level
, int layout
, int raiddisks
,
2236 int chunk
, unsigned long long size
,
2237 char *dev
, unsigned long long *freesize
,
2240 static int validate_geometry_ddf_bvd(struct supertype
*st
,
2241 int level
, int layout
, int raiddisks
,
2242 int chunk
, unsigned long long size
,
2243 char *dev
, unsigned long long *freesize
,
2246 static int validate_geometry_ddf(struct supertype
*st
,
2247 int level
, int layout
, int raiddisks
,
2248 int chunk
, unsigned long long size
,
2249 char *dev
, unsigned long long *freesize
,
2256 /* ddf potentially supports lots of things, but it depends on
2257 * what devices are offered (and maybe kernel version?)
2258 * If given unused devices, we will make a container.
2259 * If given devices in a container, we will make a BVD.
2260 * If given BVDs, we make an SVD, changing all the GUIDs in the process.
2263 if (level
== LEVEL_CONTAINER
) {
2264 /* Must be a fresh device to add to a container */
2265 return validate_geometry_ddf_container(st
, level
, layout
,
2267 size
, dev
, freesize
,
2272 /* A container has already been opened, so we are
2273 * creating in there. Maybe a BVD, maybe an SVD.
2274 * Should make a distinction one day.
2276 return validate_geometry_ddf_bvd(st
, level
, layout
, raiddisks
,
2277 chunk
, size
, dev
, freesize
,
2281 /* Initial sanity check. Exclude illegal levels. */
2283 for (i
=0; ddf_level_num
[i
].num1
!= MAXINT
; i
++)
2284 if (ddf_level_num
[i
].num2
== level
)
2286 if (ddf_level_num
[i
].num1
== MAXINT
)
2288 /* Should check layout? etc */
2292 /* This is the first device for the array.
2293 * If it is a container, we read it in and do automagic allocations,
2294 * no other devices should be given.
2295 * Otherwise it must be a member device of a container, and we
2296 * do manual allocation.
2297 * Later we should check for a BVD and make an SVD.
2299 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2301 sra
= sysfs_read(fd
, 0, GET_VERSION
);
2303 if (sra
&& sra
->array
.major_version
== -1 &&
2304 strcmp(sra
->text_version
, "ddf") == 0) {
2307 /* find space for 'n' devices. */
2308 /* remember the devices */
2309 /* Somehow return the fact that we have enough */
2314 Name
": ddf: Cannot create this array "
2319 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
2321 fprintf(stderr
, Name
": ddf: Cannot open %s: %s\n",
2322 dev
, strerror(errno
));
2325 /* Well, it is in use by someone, maybe a 'ddf' container. */
2326 cfd
= open_container(fd
);
2330 fprintf(stderr
, Name
": ddf: Cannot use %s: %s\n",
2331 dev
, strerror(EBUSY
));
2334 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
2336 if (sra
&& sra
->array
.major_version
== -1 &&
2337 strcmp(sra
->text_version
, "ddf") == 0) {
2338 /* This is a member of a ddf container. Load the container
2339 * and try to create a bvd
2341 struct ddf_super
*ddf
;
2342 if (load_super_ddf_all(st
, cfd
, (void **)&ddf
, NULL
, 1) == 0) {
2344 st
->container_dev
= fd2devnum(cfd
);
2346 return validate_geometry_ddf_bvd(st
, level
, layout
,
2347 raiddisks
, chunk
, size
,
2352 } else /* device may belong to a different container */
2359 validate_geometry_ddf_container(struct supertype
*st
,
2360 int level
, int layout
, int raiddisks
,
2361 int chunk
, unsigned long long size
,
2362 char *dev
, unsigned long long *freesize
,
2366 unsigned long long ldsize
;
2368 if (level
!= LEVEL_CONTAINER
)
2373 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2376 fprintf(stderr
, Name
": ddf: Cannot open %s: %s\n",
2377 dev
, strerror(errno
));
2380 if (!get_dev_size(fd
, dev
, &ldsize
)) {
2386 *freesize
= avail_size_ddf(st
, ldsize
>> 9);
2391 static int validate_geometry_ddf_bvd(struct supertype
*st
,
2392 int level
, int layout
, int raiddisks
,
2393 int chunk
, unsigned long long size
,
2394 char *dev
, unsigned long long *freesize
,
2398 struct ddf_super
*ddf
= st
->sb
;
2400 unsigned long long pos
= 0;
2401 unsigned long long maxsize
;
2404 /* ddf/bvd supports lots of things, but not containers */
2405 if (level
== LEVEL_CONTAINER
)
2407 /* We must have the container info already read in. */
2412 /* General test: make sure there is space for
2413 * 'raiddisks' device extents of size 'size'.
2415 unsigned long long minsize
= size
;
2419 for (dl
= ddf
->dlist
; dl
; dl
= dl
->next
)
2425 e
= get_extents(ddf
, dl
);
2428 unsigned long long esize
;
2429 esize
= e
[i
].start
- pos
;
2430 if (esize
>= minsize
)
2432 pos
= e
[i
].start
+ e
[i
].size
;
2434 } while (e
[i
-1].size
);
2439 if (dcnt
< raiddisks
) {
2442 Name
": ddf: Not enough devices with "
2443 "space for this array (%d < %d)\n",
2449 /* This device must be a member of the set */
2450 if (stat(dev
, &stb
) < 0)
2452 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
2454 for (dl
= ddf
->dlist
; dl
; dl
= dl
->next
) {
2455 if (dl
->major
== major(stb
.st_rdev
) &&
2456 dl
->minor
== minor(stb
.st_rdev
))
2461 fprintf(stderr
, Name
": ddf: %s is not in the "
2466 e
= get_extents(ddf
, dl
);
2470 unsigned long long esize
;
2471 esize
= e
[i
].start
- pos
;
2472 if (esize
>= maxsize
)
2474 pos
= e
[i
].start
+ e
[i
].size
;
2476 } while (e
[i
-1].size
);
2477 *freesize
= maxsize
;
2483 static int load_super_ddf_all(struct supertype
*st
, int fd
,
2484 void **sbp
, char *devname
, int keep_fd
)
2487 struct ddf_super
*super
;
2488 struct mdinfo
*sd
, *best
= NULL
;
2494 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
2497 if (sra
->array
.major_version
!= -1 ||
2498 sra
->array
.minor_version
!= -2 ||
2499 strcmp(sra
->text_version
, "ddf") != 0)
2502 if (posix_memalign((void**)&super
, 512, sizeof(*super
)) != 0)
2504 memset(super
, 0, sizeof(*super
));
2506 /* first, try each device, and choose the best ddf */
2507 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
2509 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
2510 dfd
= dev_open(nm
, O_RDONLY
);
2513 rv
= load_ddf_headers(dfd
, super
, NULL
);
2516 seq
= __be32_to_cpu(super
->active
->seq
);
2517 if (super
->active
->openflag
)
2519 if (!best
|| seq
> bestseq
) {
2527 /* OK, load this ddf */
2528 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
2529 dfd
= dev_open(nm
, O_RDONLY
);
2532 load_ddf_headers(dfd
, super
, NULL
);
2533 load_ddf_global(dfd
, super
, NULL
);
2535 /* Now we need the device-local bits */
2536 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
2537 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
2538 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
2541 load_ddf_headers(dfd
, super
, NULL
);
2542 seq
= load_ddf_local(dfd
, super
, NULL
, keep_fd
);
2543 if (!keep_fd
) close(dfd
);
2545 if (st
->subarray
[0]) {
2548 for (v
= super
->conflist
; v
; v
= v
->next
)
2549 if (v
->vcnum
== atoi(st
->subarray
))
2550 super
->currentconf
= v
;
2551 if (!super
->currentconf
)
2555 if (st
->ss
== NULL
) {
2556 st
->ss
= &super_ddf
;
2557 st
->minor_version
= 0;
2559 st
->container_dev
= fd2devnum(fd
);
2563 #endif /* MDASSEMBLE */
2565 static struct mdinfo
*container_content_ddf(struct supertype
*st
)
2567 /* Given a container loaded by load_super_ddf_all,
2568 * extract information about all the arrays into
2571 * For each vcl in conflist: create an mdinfo, fill it in,
2572 * then look for matching devices (phys_refnum) in dlist
2573 * and create appropriate device mdinfo.
2575 struct ddf_super
*ddf
= st
->sb
;
2576 struct mdinfo
*rest
= NULL
;
2579 for (vc
= ddf
->conflist
; vc
; vc
=vc
->next
)
2582 struct mdinfo
*this;
2583 this = malloc(sizeof(*this));
2584 memset(this, 0, sizeof(*this));
2588 this->array
.level
= map_num1(ddf_level_num
, vc
->conf
.prl
);
2589 this->array
.raid_disks
=
2590 __be16_to_cpu(vc
->conf
.prim_elmnt_count
);
2591 this->array
.layout
= rlq_to_layout(vc
->conf
.rlq
, vc
->conf
.prl
,
2592 this->array
.raid_disks
);
2593 this->array
.md_minor
= -1;
2594 this->array
.ctime
= DECADE
+
2595 __be32_to_cpu(*(__u32
*)(vc
->conf
.guid
+16));
2596 this->array
.utime
= DECADE
+
2597 __be32_to_cpu(vc
->conf
.timestamp
);
2598 this->array
.chunk_size
= 512 << vc
->conf
.chunk_shift
;
2601 if ((ddf
->virt
->entries
[i
].state
& DDF_state_inconsistent
) ||
2602 (ddf
->virt
->entries
[i
].init_state
& DDF_initstate_mask
) !=
2604 this->array
.state
= 0;
2605 this->resync_start
= 0;
2607 this->array
.state
= 1;
2608 this->resync_start
= ~0ULL;
2610 memcpy(this->name
, ddf
->virt
->entries
[i
].name
, 32);
2613 memset(this->uuid
, 0, sizeof(this->uuid
));
2614 this->component_size
= __be64_to_cpu(vc
->conf
.blocks
);
2615 this->array
.size
= this->component_size
/ 2;
2616 this->container_member
= i
;
2618 sprintf(this->text_version
, "/%s/%d",
2619 devnum2devname(st
->container_dev
),
2620 this->container_member
);
2622 for (i
=0 ; i
< ddf
->mppe
; i
++) {
2626 if (vc
->conf
.phys_refnum
[i
] == 0xFFFFFFFF)
2629 this->array
.working_disks
++;
2631 for (d
= ddf
->dlist
; d
; d
=d
->next
)
2632 if (d
->disk
.refnum
== vc
->conf
.phys_refnum
[i
])
2637 dev
= malloc(sizeof(*dev
));
2638 memset(dev
, 0, sizeof(*dev
));
2639 dev
->next
= this->devs
;
2642 dev
->disk
.number
= __be32_to_cpu(d
->disk
.refnum
);
2643 dev
->disk
.major
= d
->major
;
2644 dev
->disk
.minor
= d
->minor
;
2645 dev
->disk
.raid_disk
= i
;
2646 dev
->disk
.state
= (1<<MD_DISK_SYNC
)|(1<<MD_DISK_ACTIVE
);
2648 dev
->events
= __be32_to_cpu(ddf
->primary
.seq
);
2649 dev
->data_offset
= __be64_to_cpu(vc
->lba_offset
[i
]);
2650 dev
->component_size
= __be64_to_cpu(vc
->conf
.blocks
);
2652 strcpy(dev
->name
, d
->devname
);
2658 static int store_zero_ddf(struct supertype
*st
, int fd
)
2660 unsigned long long dsize
;
2663 if (!get_dev_size(fd
, NULL
, &dsize
))
2666 posix_memalign(&buf
, 512, 512);
2667 memset(buf
, 0, 512);
2669 lseek64(fd
, dsize
-512, 0);
2670 write(fd
, buf
, 512);
2675 static int compare_super_ddf(struct supertype
*st
, struct supertype
*tst
)
2679 * 0 same, or first was empty, and second was copied
2680 * 1 second had wrong number
2682 * 3 wrong other info
2684 struct ddf_super
*first
= st
->sb
;
2685 struct ddf_super
*second
= tst
->sb
;
2693 if (memcmp(first
->anchor
.guid
, second
->anchor
.guid
, DDF_GUID_LEN
) != 0)
2696 /* FIXME should I look at anything else? */
2702 * A new array 'a' has been started which claims to be instance 'inst'
2703 * within container 'c'.
2704 * We need to confirm that the array matches the metadata in 'c' so
2705 * that we don't corrupt any metadata.
2707 static int ddf_open_new(struct supertype
*c
, struct active_array
*a
, char *inst
)
2709 dprintf("ddf: open_new %s\n", inst
);
2710 a
->info
.container_member
= atoi(inst
);
2715 * The array 'a' is to be marked clean in the metadata.
2716 * If '->resync_start' is not ~(unsigned long long)0, then the array is only
2717 * clean up to the point (in sectors). If that cannot be recorded in the
2718 * metadata, then leave it as dirty.
2720 * For DDF, we need to clear the DDF_state_inconsistent bit in the
2721 * !global! virtual_disk.virtual_entry structure.
2723 static int ddf_set_array_state(struct active_array
*a
, int consistent
)
2725 struct ddf_super
*ddf
= a
->container
->sb
;
2726 int inst
= a
->info
.container_member
;
2727 int old
= ddf
->virt
->entries
[inst
].state
;
2728 if (consistent
== 2) {
2729 /* Should check if a recovery should be started FIXME */
2731 if (a
->resync_start
!= ~0ULL)
2735 ddf
->virt
->entries
[inst
].state
&= ~DDF_state_inconsistent
;
2737 ddf
->virt
->entries
[inst
].state
|= DDF_state_inconsistent
;
2738 if (old
!= ddf
->virt
->entries
[inst
].state
)
2739 ddf
->updates_pending
= 1;
2741 old
= ddf
->virt
->entries
[inst
].init_state
;
2742 ddf
->virt
->entries
[inst
].init_state
&= ~DDF_initstate_mask
;
2743 if (a
->resync_start
== ~0ULL)
2744 ddf
->virt
->entries
[inst
].init_state
|= DDF_init_full
;
2745 else if (a
->resync_start
== 0)
2746 ddf
->virt
->entries
[inst
].init_state
|= DDF_init_not
;
2748 ddf
->virt
->entries
[inst
].init_state
|= DDF_init_quick
;
2749 if (old
!= ddf
->virt
->entries
[inst
].init_state
)
2750 ddf
->updates_pending
= 1;
2752 dprintf("ddf mark %d %s %llu\n", inst
, consistent
?"clean":"dirty",
2758 * The state of each disk is stored in the global phys_disk structure
2759 * in phys_disk.entries[n].state.
2760 * This makes various combinations awkward.
2761 * - When a device fails in any array, it must be failed in all arrays
2762 * that include a part of this device.
2763 * - When a component is rebuilding, we cannot include it officially in the
2764 * array unless this is the only array that uses the device.
2766 * So: when transitioning:
2767 * Online -> failed, just set failed flag. monitor will propagate
2768 * spare -> online, the device might need to be added to the array.
2769 * spare -> failed, just set failed. Don't worry if in array or not.
2771 static void ddf_set_disk(struct active_array
*a
, int n
, int state
)
2773 struct ddf_super
*ddf
= a
->container
->sb
;
2774 int inst
= a
->info
.container_member
;
2775 struct vd_config
*vc
= find_vdcr(ddf
, inst
);
2776 int pd
= find_phys(ddf
, vc
->phys_refnum
[n
]);
2780 dprintf("ddf: cannot find instance %d!!\n", inst
);
2784 /* disk doesn't currently exist. If it is now in_sync,
2786 if ((state
& DS_INSYNC
) && ! (state
& DS_FAULTY
)) {
2787 /* Find dev 'n' in a->info->devs, determine the
2788 * ddf refnum, and set vc->phys_refnum and update
2794 int old
= ddf
->phys
->entries
[pd
].state
;
2795 if (state
& DS_FAULTY
)
2796 ddf
->phys
->entries
[pd
].state
|= __cpu_to_be16(DDF_Failed
);
2797 if (state
& DS_INSYNC
) {
2798 ddf
->phys
->entries
[pd
].state
|= __cpu_to_be16(DDF_Online
);
2799 ddf
->phys
->entries
[pd
].state
&= __cpu_to_be16(~DDF_Rebuilding
);
2801 if (old
!= ddf
->phys
->entries
[pd
].state
)
2802 ddf
->updates_pending
= 1;
2805 dprintf("ddf: set_disk %d to %x\n", n
, state
);
2807 /* Now we need to check the state of the array and update
2808 * virtual_disk.entries[n].state.
2809 * It needs to be one of "optimal", "degraded", "failed".
2810 * I don't understand 'deleted' or 'missing'.
2813 for (i
=0; i
< a
->info
.array
.raid_disks
; i
++) {
2814 pd
= find_phys(ddf
, vc
->phys_refnum
[i
]);
2817 st
= __be16_to_cpu(ddf
->phys
->entries
[pd
].state
);
2818 if ((st
& (DDF_Online
|DDF_Failed
|DDF_Rebuilding
))
2822 state
= DDF_state_degraded
;
2823 if (working
== a
->info
.array
.raid_disks
)
2824 state
= DDF_state_optimal
;
2825 else switch(vc
->prl
) {
2829 state
= DDF_state_failed
;
2833 state
= DDF_state_failed
;
2837 if (working
< a
->info
.array
.raid_disks
-1)
2838 state
= DDF_state_failed
;
2841 if (working
< a
->info
.array
.raid_disks
-2)
2842 state
= DDF_state_failed
;
2843 else if (working
== a
->info
.array
.raid_disks
-1)
2844 state
= DDF_state_part_optimal
;
2848 if (ddf
->virt
->entries
[inst
].state
!=
2849 ((ddf
->virt
->entries
[inst
].state
& ~DDF_state_mask
)
2852 ddf
->virt
->entries
[inst
].state
=
2853 (ddf
->virt
->entries
[inst
].state
& ~DDF_state_mask
)
2855 ddf
->updates_pending
= 1;
2860 static void ddf_sync_metadata(struct supertype
*st
)
2864 * Write all data to all devices.
2865 * Later, we might be able to track whether only local changes
2866 * have been made, or whether any global data has been changed,
2867 * but ddf is sufficiently weird that it probably always
2868 * changes global data ....
2870 struct ddf_super
*ddf
= st
->sb
;
2871 if (!ddf
->updates_pending
)
2873 ddf
->updates_pending
= 0;
2874 __write_init_super_ddf(st
, 0);
2875 dprintf("ddf: sync_metadata\n");
2878 static void ddf_process_update(struct supertype
*st
,
2879 struct metadata_update
*update
)
2881 /* Apply this update to the metadata.
2882 * The first 4 bytes are a DDF_*_MAGIC which guides
2884 * Possible update are:
2885 * DDF_PHYS_RECORDS_MAGIC
2886 * Add a new physical device. Changes to this record
2887 * only happen implicitly.
2888 * used_pdes is the device number.
2889 * DDF_VIRT_RECORDS_MAGIC
2890 * Add a new VD. Possibly also change the 'access' bits.
2891 * populated_vdes is the entry number.
2893 * New or updated VD. the VIRT_RECORD must already
2894 * exist. For an update, phys_refnum and lba_offset
2895 * (at least) are updated, and the VD_CONF must
2896 * be written to precisely those devices listed with
2898 * DDF_SPARE_ASSIGN_MAGIC
2899 * replacement Spare Assignment Record... but for which device?
2902 * - to create a new array, we send a VIRT_RECORD and
2903 * a VD_CONF. Then assemble and start the array.
2904 * - to activate a spare we send a VD_CONF to add the phys_refnum
2905 * and offset. This will also mark the spare as active with
2906 * a spare-assignment record.
2908 struct ddf_super
*ddf
= st
->sb
;
2909 __u32
*magic
= (__u32
*)update
->buf
;
2910 struct phys_disk
*pd
;
2911 struct virtual_disk
*vd
;
2912 struct vd_config
*vc
;
2918 dprintf("Process update %x\n", *magic
);
2921 case DDF_PHYS_RECORDS_MAGIC
:
2923 if (update
->len
!= (sizeof(struct phys_disk
) +
2924 sizeof(struct phys_disk_entry
)))
2926 pd
= (struct phys_disk
*)update
->buf
;
2928 ent
= __be16_to_cpu(pd
->used_pdes
);
2929 if (ent
>= __be16_to_cpu(ddf
->phys
->max_pdes
))
2931 if (!all_ff(ddf
->phys
->entries
[ent
].guid
))
2933 ddf
->phys
->entries
[ent
] = pd
->entries
[0];
2934 ddf
->phys
->used_pdes
= __cpu_to_be16(1 +
2935 __be16_to_cpu(ddf
->phys
->used_pdes
));
2936 ddf
->updates_pending
= 1;
2937 if (ddf
->add_list
) {
2938 struct active_array
*a
;
2939 struct dl
*al
= ddf
->add_list
;
2940 ddf
->add_list
= al
->next
;
2942 al
->next
= ddf
->dlist
;
2945 /* As a device has been added, we should check
2946 * for any degraded devices that might make
2947 * use of this spare */
2948 for (a
= st
->arrays
; a
; a
=a
->next
)
2949 a
->check_degraded
= 1;
2953 case DDF_VIRT_RECORDS_MAGIC
:
2955 if (update
->len
!= (sizeof(struct virtual_disk
) +
2956 sizeof(struct virtual_entry
)))
2958 vd
= (struct virtual_disk
*)update
->buf
;
2960 ent
= __be16_to_cpu(vd
->populated_vdes
);
2961 if (ent
>= __be16_to_cpu(ddf
->virt
->max_vdes
))
2963 if (!all_ff(ddf
->virt
->entries
[ent
].guid
))
2965 ddf
->virt
->entries
[ent
] = vd
->entries
[0];
2966 ddf
->virt
->populated_vdes
= __cpu_to_be16(1 +
2967 __be16_to_cpu(ddf
->virt
->populated_vdes
));
2968 ddf
->updates_pending
= 1;
2971 case DDF_VD_CONF_MAGIC
:
2972 dprintf("len %d %d\n", update
->len
, ddf
->conf_rec_len
);
2974 mppe
= __be16_to_cpu(ddf
->anchor
.max_primary_element_entries
);
2975 if (update
->len
!= ddf
->conf_rec_len
* 512)
2977 vc
= (struct vd_config
*)update
->buf
;
2978 for (vcl
= ddf
->conflist
; vcl
; vcl
= vcl
->next
)
2979 if (memcmp(vcl
->conf
.guid
, vc
->guid
, DDF_GUID_LEN
) == 0)
2981 dprintf("vcl = %p\n", vcl
);
2983 /* An update, just copy the phys_refnum and lba_offset
2986 memcpy(vcl
->conf
.phys_refnum
, vc
->phys_refnum
,
2987 mppe
* (sizeof(__u32
) + sizeof(__u64
)));
2990 vcl
= update
->space
;
2991 update
->space
= NULL
;
2992 vcl
->next
= ddf
->conflist
;
2993 memcpy(&vcl
->conf
, vc
, update
->len
);
2994 vcl
->lba_offset
= (__u64
*)
2995 &vcl
->conf
.phys_refnum
[mppe
];
2996 ddf
->conflist
= vcl
;
2998 /* Now make sure vlist is correct for each dl. */
2999 for (dl
= ddf
->dlist
; dl
; dl
= dl
->next
) {
3002 for (vcl
= ddf
->conflist
; vcl
; vcl
= vcl
->next
)
3003 for (dn
=0; dn
< ddf
->mppe
; dn
++)
3004 if (vcl
->conf
.phys_refnum
[dn
] ==
3006 dprintf("dev %d has %p at %d\n",
3007 dl
->pdnum
, vcl
, vn
);
3008 dl
->vlist
[vn
++] = vcl
;
3011 while (vn
< ddf
->max_part
)
3012 dl
->vlist
[vn
++] = NULL
;
3014 ddf
->phys
->entries
[dl
->pdnum
].type
&=
3015 ~__cpu_to_be16(DDF_Global_Spare
);
3016 ddf
->phys
->entries
[dl
->pdnum
].type
|=
3017 __cpu_to_be16(DDF_Active_in_VD
);
3020 ddf
->phys
->entries
[dl
->pdnum
].type
&=
3021 ~__cpu_to_be16(DDF_Global_Spare
);
3022 ddf
->phys
->entries
[dl
->pdnum
].type
|=
3023 __cpu_to_be16(DDF_Spare
);
3025 if (!dl
->vlist
[0] && !dl
->spare
) {
3026 ddf
->phys
->entries
[dl
->pdnum
].type
|=
3027 __cpu_to_be16(DDF_Global_Spare
);
3028 ddf
->phys
->entries
[dl
->pdnum
].type
&=
3029 ~__cpu_to_be16(DDF_Spare
|
3033 ddf
->updates_pending
= 1;
3035 case DDF_SPARE_ASSIGN_MAGIC
:
3040 static void ddf_prepare_update(struct supertype
*st
,
3041 struct metadata_update
*update
)
3043 /* This update arrived at managemon.
3044 * We are about to pass it to monitor.
3045 * If a malloc is needed, do it here.
3047 struct ddf_super
*ddf
= st
->sb
;
3048 __u32
*magic
= (__u32
*)update
->buf
;
3049 if (*magic
== DDF_VD_CONF_MAGIC
)
3050 posix_memalign(&update
->space
, 512,
3051 offsetof(struct vcl
, conf
)
3052 + ddf
->conf_rec_len
* 512);
3056 * Check if the array 'a' is degraded but not failed.
3057 * If it is, find as many spares as are available and needed and
3058 * arrange for their inclusion.
3059 * We only choose devices which are not already in the array,
3060 * and prefer those with a spare-assignment to this array.
3061 * otherwise we choose global spares - assuming always that
3062 * there is enough room.
3063 * For each spare that we assign, we return an 'mdinfo' which
3064 * describes the position for the device in the array.
3065 * We also add to 'updates' a DDF_VD_CONF_MAGIC update with
3066 * the new phys_refnum and lba_offset values.
3068 * Only worry about BVDs at the moment.
3070 static struct mdinfo
*ddf_activate_spare(struct active_array
*a
,
3071 struct metadata_update
**updates
)
3075 struct ddf_super
*ddf
= a
->container
->sb
;
3077 struct mdinfo
*rv
= NULL
;
3079 struct metadata_update
*mu
;
3082 struct vd_config
*vc
;
3085 for (d
= a
->info
.devs
; d
; d
= d
->next
) {
3086 if ((d
->curr_state
& DS_FAULTY
) &&
3088 /* wait for Removal to happen */
3090 if (d
->state_fd
>= 0)
3094 dprintf("ddf_activate: working=%d (%d) level=%d\n", working
, a
->info
.array
.raid_disks
,
3095 a
->info
.array
.level
);
3096 if (working
== a
->info
.array
.raid_disks
)
3097 return NULL
; /* array not degraded */
3098 switch (a
->info
.array
.level
) {
3101 return NULL
; /* failed */
3105 if (working
< a
->info
.array
.raid_disks
- 1)
3106 return NULL
; /* failed */
3109 if (working
< a
->info
.array
.raid_disks
- 2)
3110 return NULL
; /* failed */
3112 default: /* concat or stripe */
3113 return NULL
; /* failed */
3116 /* For each slot, if it is not working, find a spare */
3118 for (i
= 0; i
< a
->info
.array
.raid_disks
; i
++) {
3119 for (d
= a
->info
.devs
; d
; d
= d
->next
)
3120 if (d
->disk
.raid_disk
== i
)
3122 dprintf("found %d: %p %x\n", i
, d
, d
?d
->curr_state
:0);
3123 if (d
&& (d
->state_fd
>= 0))
3126 /* OK, this device needs recovery. Find a spare */
3128 for ( ; dl
; dl
= dl
->next
) {
3129 unsigned long long esize
;
3130 unsigned long long pos
;
3133 int is_dedicated
= 0;
3136 /* If in this array, skip */
3137 for (d2
= a
->info
.devs
; d2
; d2
= d2
->next
)
3138 if (d2
->disk
.major
== dl
->major
&&
3139 d2
->disk
.minor
== dl
->minor
) {
3140 dprintf("%x:%x already in array\n", dl
->major
, dl
->minor
);
3145 if (ddf
->phys
->entries
[dl
->pdnum
].type
&
3146 __cpu_to_be16(DDF_Spare
)) {
3147 /* Check spare assign record */
3149 if (dl
->spare
->type
& DDF_spare_dedicated
) {
3150 /* check spare_ents for guid */
3152 j
< __be16_to_cpu(dl
->spare
->populated
);
3154 if (memcmp(dl
->spare
->spare_ents
[j
].guid
,
3155 ddf
->virt
->entries
[a
->info
.container_member
].guid
,
3162 } else if (ddf
->phys
->entries
[dl
->pdnum
].type
&
3163 __cpu_to_be16(DDF_Global_Spare
)) {
3166 if ( ! (is_dedicated
||
3167 (is_global
&& global_ok
))) {
3168 dprintf("%x:%x not suitable: %d %d\n", dl
->major
, dl
->minor
,
3169 is_dedicated
, is_global
);
3173 /* We are allowed to use this device - is there space?
3174 * We need a->info.component_size sectors */
3175 ex
= get_extents(ddf
, dl
);
3177 dprintf("cannot get extents\n");
3184 esize
= ex
[j
].start
- pos
;
3185 if (esize
>= a
->info
.component_size
)
3187 pos
= ex
[i
].start
+ ex
[i
].size
;
3189 } while (ex
[i
-1].size
);
3192 if (esize
< a
->info
.component_size
) {
3193 dprintf("%x:%x has no room: %llu %llu\n", dl
->major
, dl
->minor
,
3194 esize
, a
->info
.component_size
);
3199 /* Cool, we have a device with some space at pos */
3200 di
= malloc(sizeof(*di
));
3201 memset(di
, 0, sizeof(*di
));
3202 di
->disk
.number
= i
;
3203 di
->disk
.raid_disk
= i
;
3204 di
->disk
.major
= dl
->major
;
3205 di
->disk
.minor
= dl
->minor
;
3207 di
->data_offset
= pos
;
3208 di
->component_size
= a
->info
.component_size
;
3209 di
->container_member
= dl
->pdnum
;
3212 dprintf("%x:%x to be %d at %llu\n", dl
->major
, dl
->minor
,
3217 if (!dl
&& ! global_ok
) {
3218 /* not enough dedicated spares, try global */
3226 /* No spares found */
3228 /* Now 'rv' has a list of devices to return.
3229 * Create a metadata_update record to update the
3230 * phys_refnum and lba_offset values
3232 mu
= malloc(sizeof(*mu
));
3233 mu
->buf
= malloc(ddf
->conf_rec_len
* 512);
3234 posix_memalign(&mu
->space
, 512, sizeof(struct vcl
));
3235 mu
->len
= ddf
->conf_rec_len
;
3236 mu
->next
= *updates
;
3237 vc
= find_vdcr(ddf
, a
->info
.container_member
);
3238 memcpy(mu
->buf
, vc
, ddf
->conf_rec_len
* 512);
3240 vc
= (struct vd_config
*)mu
->buf
;
3241 lba
= (__u64
*)&vc
->phys_refnum
[ddf
->mppe
];
3242 for (di
= rv
; di
; di
= di
->next
) {
3243 vc
->phys_refnum
[di
->disk
.raid_disk
] =
3244 ddf
->phys
->entries
[dl
->pdnum
].refnum
;
3245 lba
[di
->disk
.raid_disk
] = di
->data_offset
;
3250 #endif /* MDASSEMBLE */
3252 struct superswitch super_ddf
= {
3254 .examine_super
= examine_super_ddf
,
3255 .brief_examine_super
= brief_examine_super_ddf
,
3256 .detail_super
= detail_super_ddf
,
3257 .brief_detail_super
= brief_detail_super_ddf
,
3258 .validate_geometry
= validate_geometry_ddf
,
3259 .write_init_super
= write_init_super_ddf
,
3260 .add_to_super
= add_to_super_ddf
,
3262 .match_home
= match_home_ddf
,
3263 .uuid_from_super
= uuid_from_super_ddf
,
3264 .getinfo_super
= getinfo_super_ddf
,
3265 .update_super
= update_super_ddf
,
3267 .avail_size
= avail_size_ddf
,
3269 .compare_super
= compare_super_ddf
,
3271 .load_super
= load_super_ddf
,
3272 .init_super
= init_super_ddf
,
3273 .store_super
= store_zero_ddf
,
3274 .free_super
= free_super_ddf
,
3275 .match_metadata_desc
= match_metadata_desc_ddf
,
3276 .container_content
= container_content_ddf
,
3282 .open_new
= ddf_open_new
,
3283 .set_array_state
= ddf_set_array_state
,
3284 .set_disk
= ddf_set_disk
,
3285 .sync_metadata
= ddf_sync_metadata
,
3286 .process_update
= ddf_process_update
,
3287 .prepare_update
= ddf_prepare_update
,
3288 .activate_spare
= ddf_activate_spare
,