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 static inline int ROUND_UP(int a
, int base
)
36 return ((a
+base
-1)/base
)*base
;
39 /* a non-official T10 name for creation GUIDs */
40 static char T10
[] = "Linux-MD";
42 /* DDF timestamps are 1980 based, so we need to add
43 * second-in-decade-of-seventies to convert to linux timestamps.
44 * 10 years with 2 leap years.
46 #define DECADE (3600*24*(365*10+2))
49 const unsigned char *buf
,
52 /* The DDF metadata handling.
53 * DDF metadata lives at the end of the device.
54 * The last 512 byte block provides an 'anchor' which is used to locate
55 * the rest of the metadata which usually lives immediately behind the anchor.
58 * - all multibyte numeric fields are bigendian.
59 * - all strings are space padded.
63 /* Primary Raid Level (PRL) */
64 #define DDF_RAID0 0x00
65 #define DDF_RAID1 0x01
66 #define DDF_RAID3 0x03
67 #define DDF_RAID4 0x04
68 #define DDF_RAID5 0x05
69 #define DDF_RAID1E 0x11
71 #define DDF_CONCAT 0x1f
72 #define DDF_RAID5E 0x15
73 #define DDF_RAID5EE 0x25
74 #define DDF_RAID6 0x16 /* Vendor unique layout */
76 /* Raid Level Qualifier (RLQ) */
77 #define DDF_RAID0_SIMPLE 0x00
78 #define DDF_RAID1_SIMPLE 0x00 /* just 2 devices in this plex */
79 #define DDF_RAID1_MULTI 0x01 /* exactly 3 devices in this plex */
80 #define DDF_RAID3_0 0x00 /* parity in first extent */
81 #define DDF_RAID3_N 0x01 /* parity in last extent */
82 #define DDF_RAID4_0 0x00 /* parity in first extent */
83 #define DDF_RAID4_N 0x01 /* parity in last extent */
84 /* these apply to raid5e and raid5ee as well */
85 #define DDF_RAID5_0_RESTART 0x00 /* same as 'right asymmetric' - layout 1 */
86 #define DDF_RAID5_N_RESTART 0x02 /* same as 'left asymmetric' - layout 0 */
87 #define DDF_RAID5_N_CONTINUE 0x03 /* same as 'left symmetric' - layout 2 */
89 #define DDF_RAID1E_ADJACENT 0x00 /* raid10 nearcopies==2 */
90 #define DDF_RAID1E_OFFSET 0x01 /* raid10 offsetcopies==2 */
92 /* Secondary RAID Level (SRL) */
93 #define DDF_2STRIPED 0x00 /* This is weirder than RAID0 !! */
94 #define DDF_2MIRRORED 0x01
95 #define DDF_2CONCAT 0x02
96 #define DDF_2SPANNED 0x03 /* This is also weird - be careful */
99 #define DDF_HEADER_MAGIC __cpu_to_be32(0xDE11DE11)
100 #define DDF_CONTROLLER_MAGIC __cpu_to_be32(0xAD111111)
101 #define DDF_PHYS_RECORDS_MAGIC __cpu_to_be32(0x22222222)
102 #define DDF_PHYS_DATA_MAGIC __cpu_to_be32(0x33333333)
103 #define DDF_VIRT_RECORDS_MAGIC __cpu_to_be32(0xDDDDDDDD)
104 #define DDF_VD_CONF_MAGIC __cpu_to_be32(0xEEEEEEEE)
105 #define DDF_SPARE_ASSIGN_MAGIC __cpu_to_be32(0x55555555)
106 #define DDF_VU_CONF_MAGIC __cpu_to_be32(0x88888888)
107 #define DDF_VENDOR_LOG_MAGIC __cpu_to_be32(0x01dBEEF0)
108 #define DDF_BBM_LOG_MAGIC __cpu_to_be32(0xABADB10C)
110 #define DDF_GUID_LEN 24
111 #define DDF_REVISION "01.00.00"
116 char guid
[DDF_GUID_LEN
];
117 char revision
[8]; /* 01.00.00 */
118 __u32 seq
; /* starts at '1' */
123 __u8 pad0
; /* 0xff */
124 __u8 pad1
[12]; /* 12 * 0xff */
125 /* 64 bytes so far */
126 __u8 header_ext
[32]; /* reserved: fill with 0xff */
130 __u8 pad2
[3]; /* 0xff */
131 __u32 workspace_len
; /* sectors for vendor space -
132 * at least 32768(sectors) */
134 __u16 max_pd_entries
; /* one of 15, 63, 255, 1023, 4095 */
135 __u16 max_vd_entries
; /* 2^(4,6,8,10,12)-1 : i.e. as above */
136 __u16 max_partitions
; /* i.e. max num of configuration
137 record entries per disk */
138 __u16 config_record_len
; /* 1 +ROUNDUP(max_primary_element_entries
140 __u16 max_primary_element_entries
; /* 16, 64, 256, 1024, or 4096 */
141 __u8 pad3
[54]; /* 0xff */
142 /* 192 bytes so far */
143 __u32 controller_section_offset
;
144 __u32 controller_section_length
;
145 __u32 phys_section_offset
;
146 __u32 phys_section_length
;
147 __u32 virt_section_offset
;
148 __u32 virt_section_length
;
149 __u32 config_section_offset
;
150 __u32 config_section_length
;
151 __u32 data_section_offset
;
152 __u32 data_section_length
;
153 __u32 bbm_section_offset
;
154 __u32 bbm_section_length
;
155 __u32 diag_space_offset
;
156 __u32 diag_space_length
;
159 /* 256 bytes so far */
160 __u8 pad4
[256]; /* 0xff */
164 #define DDF_HEADER_ANCHOR 0x00
165 #define DDF_HEADER_PRIMARY 0x01
166 #define DDF_HEADER_SECONDARY 0x02
168 /* The content of the 'controller section' - global scope */
169 struct ddf_controller_data
{
172 char guid
[DDF_GUID_LEN
];
173 struct controller_type
{
180 __u8 pad
[8]; /* 0xff */
181 __u8 vendor_data
[448];
184 /* The content of phys_section - global scope */
191 struct phys_disk_entry
{
192 char guid
[DDF_GUID_LEN
];
196 __u64 config_size
; /* DDF structures must be after here */
197 char path
[18]; /* another horrible structure really */
202 /* phys_disk_entry.type is a bitmap - bigendian remember */
203 #define DDF_Forced_PD_GUID 1
204 #define DDF_Active_in_VD 2
205 #define DDF_Global_Spare 4
206 #define DDF_Spare 8 /* overrides Global_spare */
207 #define DDF_Foreign 16
208 #define DDF_Legacy 32 /* no DDF on this device */
210 #define DDF_Interface_mask 0xf00
211 #define DDF_Interface_SCSI 0x100
212 #define DDF_Interface_SAS 0x200
213 #define DDF_Interface_SATA 0x300
214 #define DDF_Interface_FC 0x400
216 /* phys_disk_entry.state is a bigendian bitmap */
218 #define DDF_Failed 2 /* overrides 1,4,8 */
219 #define DDF_Rebuilding 4
220 #define DDF_Transition 8
222 #define DDF_ReadErrors 32
223 #define DDF_Missing 64
225 /* The content of the virt_section global scope */
226 struct virtual_disk
{
229 __u16 populated_vdes
;
232 struct virtual_entry
{
233 char guid
[DDF_GUID_LEN
];
235 __u16 pad0
; /* 0xffff */
245 /* virtual_entry.type is a bitmap - bigendian */
247 #define DDF_Enforce_Groups 2
248 #define DDF_Unicode 4
249 #define DDF_Owner_Valid 8
251 /* virtual_entry.state is a bigendian bitmap */
252 #define DDF_state_mask 0x7
253 #define DDF_state_optimal 0x0
254 #define DDF_state_degraded 0x1
255 #define DDF_state_deleted 0x2
256 #define DDF_state_missing 0x3
257 #define DDF_state_failed 0x4
258 #define DDF_state_part_optimal 0x5
260 #define DDF_state_morphing 0x8
261 #define DDF_state_inconsistent 0x10
263 /* virtual_entry.init_state is a bigendian bitmap */
264 #define DDF_initstate_mask 0x03
265 #define DDF_init_not 0x00
266 #define DDF_init_quick 0x01 /* initialisation is progress.
267 * i.e. 'state_inconsistent' */
268 #define DDF_init_full 0x02
270 #define DDF_access_mask 0xc0
271 #define DDF_access_rw 0x00
272 #define DDF_access_ro 0x80
273 #define DDF_access_blocked 0xc0
275 /* The content of the config_section - local scope
276 * It has multiple records each config_record_len sectors
277 * They can be vd_config or spare_assign
283 char guid
[DDF_GUID_LEN
];
287 __u16 prim_elmnt_count
;
288 __u8 chunk_shift
; /* 0 == 512, 1==1024 etc */
291 __u8 sec_elmnt_count
;
294 __u64 blocks
; /* blocks per component could be different
295 * on different component devices...(only
296 * for concat I hope) */
297 __u64 array_blocks
; /* blocks in array */
305 __u8 v0
[32]; /* reserved- 0xff */
306 __u8 v1
[32]; /* reserved- 0xff */
307 __u8 v2
[16]; /* reserved- 0xff */
308 __u8 v3
[16]; /* reserved- 0xff */
310 __u32 phys_refnum
[0]; /* refnum of each disk in sequence */
311 /*__u64 lba_offset[0]; LBA offset in each phys. Note extents in a
312 bvd are always the same size */
315 /* vd_config.cache_pol[7] is a bitmap */
316 #define DDF_cache_writeback 1 /* else writethrough */
317 #define DDF_cache_wadaptive 2 /* only applies if writeback */
318 #define DDF_cache_readahead 4
319 #define DDF_cache_radaptive 8 /* only if doing read-ahead */
320 #define DDF_cache_ifnobatt 16 /* even to write cache if battery is poor */
321 #define DDF_cache_wallowed 32 /* enable write caching */
322 #define DDF_cache_rallowed 64 /* enable read caching */
324 struct spare_assign
{
330 __u16 populated
; /* SAEs used */
331 __u16 max
; /* max SAEs */
333 struct spare_assign_entry
{
334 char guid
[DDF_GUID_LEN
];
335 __u16 secondary_element
;
339 /* spare_assign.type is a bitmap */
340 #define DDF_spare_dedicated 0x1 /* else global */
341 #define DDF_spare_revertible 0x2 /* else committable */
342 #define DDF_spare_active 0x4 /* else not active */
343 #define DDF_spare_affinity 0x8 /* enclosure affinity */
345 /* The data_section contents - local scope */
349 char guid
[DDF_GUID_LEN
];
350 __u32 refnum
; /* crc of some magic drive data ... */
351 __u8 forced_ref
; /* set when above was not result of magic */
352 __u8 forced_guid
; /* set if guid was forced rather than magic */
357 /* bbm_section content */
358 struct bad_block_log
{
365 struct mapped_block
{
366 __u64 defective_start
;
367 __u32 replacement_start
;
373 /* Struct for internally holding ddf structures */
374 /* The DDF structure stored on each device is potentially
375 * quite different, as some data is global and some is local.
376 * The global data is:
379 * - Physical disk records
380 * - Virtual disk records
382 * - Configuration records
383 * - Physical Disk data section
384 * ( and Bad block and vendor which I don't care about yet).
386 * The local data is parsed into separate lists as it is read
387 * and reconstructed for writing. This means that we only need
388 * to make config changes once and they are automatically
389 * propagated to all devices.
390 * Note that the ddf_super has space of the conf and disk data
391 * for this disk and also for a list of all such data.
392 * The list is only used for the superblock that is being
393 * built in Create or Assemble to describe the whole array.
396 struct ddf_header anchor
, primary
, secondary
, *active
;
397 struct ddf_controller_data controller
;
398 struct phys_disk
*phys
;
399 struct virtual_disk
*virt
;
404 __u64
*lba_offset
; /* location in 'conf' of
406 struct vd_config conf
;
407 } *conflist
, *newconf
;
410 struct disk_data disk
;
414 struct vcl
*vlist
[0]; /* max_part+1 in size */
419 #define offsetof(t,f) ((size_t)&(((t*)0)->f))
422 extern struct superswitch super_ddf_container
, super_ddf_bvd
, super_ddf
;
424 static int calc_crc(void *buf
, int len
)
426 /* crcs are always at the same place as in the ddf_header */
427 struct ddf_header
*ddf
= buf
;
428 __u32 oldcrc
= ddf
->crc
;
430 ddf
->crc
= 0xffffffff;
432 newcrc
= crc32(0, buf
, len
);
437 static int load_ddf_header(int fd
, unsigned long long lba
,
438 unsigned long long size
,
440 struct ddf_header
*hdr
, struct ddf_header
*anchor
)
442 /* read a ddf header (primary or secondary) from fd/lba
443 * and check that it is consistent with anchor
445 * magic, crc, guid, rev, and LBA's header_type, and
446 * everything after header_type must be the same
451 if (lseek64(fd
, lba
<<9, 0) < 0)
454 if (read(fd
, hdr
, 512) != 512)
457 if (hdr
->magic
!= DDF_HEADER_MAGIC
)
459 if (calc_crc(hdr
, 512) != hdr
->crc
)
461 if (memcmp(anchor
->guid
, hdr
->guid
, DDF_GUID_LEN
) != 0 ||
462 memcmp(anchor
->revision
, hdr
->revision
, 8) != 0 ||
463 anchor
->primary_lba
!= hdr
->primary_lba
||
464 anchor
->secondary_lba
!= hdr
->secondary_lba
||
466 memcmp(anchor
->pad2
, hdr
->pad2
, 512 -
467 offsetof(struct ddf_header
, pad2
)) != 0)
470 /* Looks good enough to me... */
474 static void *load_section(int fd
, struct ddf_super
*super
, void *buf
,
475 __u32 offset_be
, __u32 len_be
, int check
)
477 unsigned long long offset
= __be32_to_cpu(offset_be
);
478 unsigned long long len
= __be32_to_cpu(len_be
);
479 int dofree
= (buf
== NULL
);
482 if (len
!= 2 && len
!= 8 && len
!= 32
483 && len
!= 128 && len
!= 512)
489 /* All pre-allocated sections are a single block */
493 buf
= malloc(len
<<9);
497 if (super
->active
->type
== 1)
498 offset
+= __be64_to_cpu(super
->active
->primary_lba
);
500 offset
+= __be64_to_cpu(super
->active
->secondary_lba
);
502 if (lseek64(fd
, offset
<<9, 0) != (offset
<<9)) {
507 if (read(fd
, buf
, len
<<9) != (len
<<9)) {
515 static int load_ddf_headers(int fd
, struct ddf_super
*super
, char *devname
)
517 unsigned long long dsize
;
519 get_dev_size(fd
, NULL
, &dsize
);
521 if (lseek64(fd
, dsize
-512, 0) < 0) {
524 Name
": Cannot seek to anchor block on %s: %s\n",
525 devname
, strerror(errno
));
528 if (read(fd
, &super
->anchor
, 512) != 512) {
531 Name
": Cannot read anchor block on %s: %s\n",
532 devname
, strerror(errno
));
535 if (super
->anchor
.magic
!= DDF_HEADER_MAGIC
) {
537 fprintf(stderr
, Name
": no DDF anchor found on %s\n",
541 if (calc_crc(&super
->anchor
, 512) != super
->anchor
.crc
) {
543 fprintf(stderr
, Name
": bad CRC on anchor on %s\n",
547 if (memcmp(super
->anchor
.revision
, DDF_REVISION
, 8) != 0) {
549 fprintf(stderr
, Name
": can only support super revision"
550 " %.8s, not %.8s on %s\n",
551 DDF_REVISION
, super
->anchor
.revision
, devname
);
554 if (load_ddf_header(fd
, __be64_to_cpu(super
->anchor
.primary_lba
),
556 &super
->primary
, &super
->anchor
) == 0) {
559 Name
": Failed to load primary DDF header "
563 super
->active
= &super
->primary
;
564 if (load_ddf_header(fd
, __be64_to_cpu(super
->anchor
.secondary_lba
),
566 &super
->secondary
, &super
->anchor
)) {
567 if ((__be32_to_cpu(super
->primary
.seq
)
568 < __be32_to_cpu(super
->secondary
.seq
) &&
569 !super
->secondary
.openflag
)
570 || (__be32_to_cpu(super
->primary
.seq
)
571 == __be32_to_cpu(super
->secondary
.seq
) &&
572 super
->primary
.openflag
&& !super
->secondary
.openflag
)
574 super
->active
= &super
->secondary
;
579 static int load_ddf_global(int fd
, struct ddf_super
*super
, char *devname
)
582 ok
= load_section(fd
, super
, &super
->controller
,
583 super
->active
->controller_section_offset
,
584 super
->active
->controller_section_length
,
586 super
->phys
= load_section(fd
, super
, NULL
,
587 super
->active
->phys_section_offset
,
588 super
->active
->phys_section_length
,
590 super
->pdsize
= __be32_to_cpu(super
->active
->phys_section_length
) * 512;
592 super
->virt
= load_section(fd
, super
, NULL
,
593 super
->active
->virt_section_offset
,
594 super
->active
->virt_section_length
,
596 super
->vdsize
= __be32_to_cpu(super
->active
->virt_section_length
) * 512;
606 super
->conflist
= NULL
;
611 static int load_ddf_local(int fd
, struct ddf_super
*super
,
612 char *devname
, int keep
)
621 /* First the local disk info */
622 super
->max_part
= __be16_to_cpu(super
->active
->max_partitions
);
623 dl
= malloc(sizeof(*dl
) +
624 (super
->max_part
+1) * sizeof(dl
->vlist
[0]));
626 load_section(fd
, super
, &dl
->disk
,
627 super
->active
->data_section_offset
,
628 super
->active
->data_section_length
,
630 dl
->devname
= devname
? strdup(devname
) : NULL
;
633 dl
->major
= major(stb
.st_rdev
);
634 dl
->minor
= minor(stb
.st_rdev
);
635 dl
->next
= super
->dlist
;
636 dl
->fd
= keep
? fd
: -1;
637 for (i
=0 ; i
< super
->max_part
+ 1 ; i
++)
641 /* Now the config list. */
642 /* 'conf' is an array of config entries, some of which are
643 * probably invalid. Those which are good need to be copied into
646 conflen
= __be16_to_cpu(super
->active
->config_record_len
);
648 conf
= load_section(fd
, super
, NULL
,
649 super
->active
->config_section_offset
,
650 super
->active
->config_section_length
,
654 i
< __be32_to_cpu(super
->active
->config_section_length
);
656 struct vd_config
*vd
=
657 (struct vd_config
*)((char*)conf
+ i
*512);
660 if (vd
->magic
!= DDF_VD_CONF_MAGIC
)
662 for (vcl
= super
->conflist
; vcl
; vcl
= vcl
->next
) {
663 if (memcmp(vcl
->conf
.guid
,
664 vd
->guid
, DDF_GUID_LEN
) == 0)
669 dl
->vlist
[i
/conflen
] = vcl
;
670 if (__be32_to_cpu(vd
->seqnum
) <=
671 __be32_to_cpu(vcl
->conf
.seqnum
))
674 vcl
= malloc(conflen
*512 + offsetof(struct vcl
, conf
));
675 vcl
->next
= super
->conflist
;
676 super
->conflist
= vcl
;
678 memcpy(&vcl
->conf
, vd
, conflen
*512);
679 mppe
= __be16_to_cpu(super
->anchor
.max_primary_element_entries
);
680 vcl
->lba_offset
= (__u64
*)
681 &vcl
->conf
.phys_refnum
[mppe
];
682 dl
->vlist
[i
/conflen
] = vcl
;
690 static int load_super_ddf_all(struct supertype
*st
, int fd
,
691 void **sbp
, char *devname
, int keep_fd
);
693 static int load_super_ddf(struct supertype
*st
, int fd
,
696 unsigned long long dsize
;
697 struct ddf_super
*super
;
701 if (load_super_ddf_all(st
, fd
, &st
->sb
, devname
, 1) == 0)
705 if (get_dev_size(fd
, devname
, &dsize
) == 0)
708 /* 32M is a lower bound */
709 if (dsize
<= 32*1024*1024) {
712 Name
": %s is too small for ddf: "
713 "size is %llu sectors.\n",
721 Name
": %s is an odd size for ddf: "
722 "size is %llu bytes.\n",
728 super
= malloc(sizeof(*super
));
730 fprintf(stderr
, Name
": malloc of %zu failed.\n",
734 memset(super
, 0, sizeof(*super
));
736 rv
= load_ddf_headers(fd
, super
, devname
);
742 /* Have valid headers and have chosen the best. Let's read in the rest*/
744 rv
= load_ddf_global(fd
, super
, devname
);
749 Name
": Failed to load all information "
750 "sections on %s\n", devname
);
755 load_ddf_local(fd
, super
, devname
, 0);
757 /* Should possibly check the sections .... */
760 if (st
->ss
== NULL
) {
762 st
->minor_version
= 0;
769 static void free_super_ddf(struct supertype
*st
)
771 struct ddf_super
*ddf
= st
->sb
;
776 while (ddf
->conflist
) {
777 struct vcl
*v
= ddf
->conflist
;
778 ddf
->conflist
= v
->next
;
782 struct dl
*d
= ddf
->dlist
;
783 ddf
->dlist
= d
->next
;
792 static struct supertype
*match_metadata_desc_ddf(char *arg
)
794 /* 'ddf' only support containers */
795 struct supertype
*st
;
796 if (strcmp(arg
, "ddf") != 0 &&
797 strcmp(arg
, "default") != 0
801 st
= malloc(sizeof(*st
));
804 st
->minor_version
= 0;
809 static struct supertype
*match_metadata_desc_ddf_bvd(char *arg
)
811 struct supertype
*st
;
812 if (strcmp(arg
, "ddf/bvd") != 0 &&
813 strcmp(arg
, "bvd") != 0 &&
814 strcmp(arg
, "default") != 0
818 st
= malloc(sizeof(*st
));
819 st
->ss
= &super_ddf_bvd
;
821 st
->minor_version
= 0;
825 static struct supertype
*match_metadata_desc_ddf_svd(char *arg
)
827 struct supertype
*st
;
828 if (strcmp(arg
, "ddf/svd") != 0 &&
829 strcmp(arg
, "svd") != 0 &&
830 strcmp(arg
, "default") != 0
834 st
= malloc(sizeof(*st
));
835 st
->ss
= &super_ddf_svd
;
837 st
->minor_version
= 0;
844 static mapping_t ddf_state
[] = {
850 { "Partially Optimal", 5},
856 static mapping_t ddf_init_state
[] = {
857 { "Not Initialised", 0},
858 { "QuickInit in Progress", 1},
859 { "Fully Initialised", 2},
863 static mapping_t ddf_access
[] = {
867 { "Blocked (no access)", 3},
871 static mapping_t ddf_level
[] = {
872 { "RAID0", DDF_RAID0
},
873 { "RAID1", DDF_RAID1
},
874 { "RAID3", DDF_RAID3
},
875 { "RAID4", DDF_RAID4
},
876 { "RAID5", DDF_RAID5
},
877 { "RAID1E",DDF_RAID1E
},
879 { "CONCAT",DDF_CONCAT
},
880 { "RAID5E",DDF_RAID5E
},
881 { "RAID5EE",DDF_RAID5EE
},
882 { "RAID6", DDF_RAID6
},
885 static mapping_t ddf_sec_level
[] = {
886 { "Striped", DDF_2STRIPED
},
887 { "Mirrored", DDF_2MIRRORED
},
888 { "Concat", DDF_2CONCAT
},
889 { "Spanned", DDF_2SPANNED
},
897 static struct num_mapping ddf_level_num
[] = {
900 { DDF_RAID3
, LEVEL_UNSUPPORTED
},
902 { DDF_RAID1E
, LEVEL_UNSUPPORTED
},
903 { DDF_JBOD
, LEVEL_UNSUPPORTED
},
904 { DDF_CONCAT
, LEVEL_LINEAR
},
905 { DDF_RAID5E
, LEVEL_UNSUPPORTED
},
906 { DDF_RAID5EE
, LEVEL_UNSUPPORTED
},
911 static int map_num1(struct num_mapping
*map
, int num
)
914 for (i
=0 ; map
[i
].num1
!= MAXINT
; i
++)
915 if (map
[i
].num1
== num
)
921 static void print_guid(char *guid
, int tstamp
)
923 /* A GUIDs are part (or all) ASCII and part binary.
924 * They tend to be space padded.
925 * We ignore trailing spaces and print numbers
926 * <0x20 and >=0x7f as \xXX
927 * Some GUIDs have a time stamp in bytes 16-19.
928 * We print that if appropriate
930 int l
= DDF_GUID_LEN
;
932 while (l
&& guid
[l
-1] == ' ')
934 for (i
=0 ; i
<l
; i
++) {
935 if (guid
[i
] >= 0x20 && guid
[i
] < 0x7f)
936 fputc(guid
[i
], stdout
);
938 fprintf(stdout
, "\\x%02x", guid
[i
]&255);
941 time_t then
= __be32_to_cpu(*(__u32
*)(guid
+16)) + DECADE
;
944 tm
= localtime(&then
);
945 strftime(tbuf
, 100, " (%D %T)",tm
);
950 static void examine_vd(int n
, struct ddf_super
*sb
, char *guid
)
952 int crl
= __be16_to_cpu(sb
->anchor
.config_record_len
);
955 for (vcl
= sb
->conflist
; vcl
; vcl
= vcl
->next
) {
956 struct vd_config
*vc
= &vcl
->conf
;
958 if (calc_crc(vc
, crl
*512) != vc
->crc
)
960 if (memcmp(vc
->guid
, guid
, DDF_GUID_LEN
) != 0)
963 /* Ok, we know about this VD, let's give more details */
964 printf(" Raid Devices[%d] : %d\n", n
,
965 __be16_to_cpu(vc
->prim_elmnt_count
));
966 printf(" Chunk Size[%d] : %d sectors\n", n
,
967 1 << vc
->chunk_shift
);
968 printf(" Raid Level[%d] : %s\n", n
,
969 map_num(ddf_level
, vc
->prl
)?:"-unknown-");
970 if (vc
->sec_elmnt_count
!= 1) {
971 printf(" Secondary Position[%d] : %d of %d\n", n
,
972 vc
->sec_elmnt_seq
, vc
->sec_elmnt_count
);
973 printf(" Secondary Level[%d] : %s\n", n
,
974 map_num(ddf_sec_level
, vc
->srl
) ?: "-unknown-");
976 printf(" Device Size[%d] : %llu\n", n
,
977 __be64_to_cpu(vc
->blocks
)/2);
978 printf(" Array Size[%d] : %llu\n", n
,
979 __be64_to_cpu(vc
->array_blocks
)/2);
983 static void examine_vds(struct ddf_super
*sb
)
985 int cnt
= __be16_to_cpu(sb
->virt
->populated_vdes
);
987 printf(" Virtual Disks : %d\n", cnt
);
989 for (i
=0; i
<cnt
; i
++) {
990 struct virtual_entry
*ve
= &sb
->virt
->entries
[i
];
991 printf(" VD GUID[%d] : ", i
); print_guid(ve
->guid
, 1);
993 printf(" unit[%d] : %d\n", i
, __be16_to_cpu(ve
->unit
));
994 printf(" state[%d] : %s, %s%s\n", i
,
995 map_num(ddf_state
, ve
->state
& 7),
996 (ve
->state
& 8) ? "Morphing, ": "",
997 (ve
->state
& 16)? "Not Consistent" : "Consistent");
998 printf(" init state[%d] : %s\n", i
,
999 map_num(ddf_init_state
, ve
->init_state
&3));
1000 printf(" access[%d] : %s\n", i
,
1001 map_num(ddf_access
, (ve
->init_state
>>6) & 3));
1002 printf(" Name[%d] : %.16s\n", i
, ve
->name
);
1003 examine_vd(i
, sb
, ve
->guid
);
1005 if (cnt
) printf("\n");
1008 static void examine_pds(struct ddf_super
*sb
)
1010 int cnt
= __be16_to_cpu(sb
->phys
->used_pdes
);
1013 printf(" Physical Disks : %d\n", cnt
);
1015 for (i
=0 ; i
<cnt
; i
++) {
1016 struct phys_disk_entry
*pd
= &sb
->phys
->entries
[i
];
1017 int type
= __be16_to_cpu(pd
->type
);
1018 int state
= __be16_to_cpu(pd
->state
);
1020 printf(" PD GUID[%d] : ", i
); print_guid(pd
->guid
, 0);
1022 printf(" ref[%d] : %08x\n", i
,
1023 __be32_to_cpu(pd
->refnum
));
1024 printf(" mode[%d] : %s%s%s%s%s\n", i
,
1025 (type
&2) ? "active":"",
1026 (type
&4) ? "Global Spare":"",
1027 (type
&8) ? "spare" : "",
1028 (type
&16)? ", foreign" : "",
1029 (type
&32)? "pass-through" : "");
1030 printf(" state[%d] : %s%s%s%s%s%s%s\n", i
,
1031 (state
&1)? "Online": "Offline",
1032 (state
&2)? ", Failed": "",
1033 (state
&4)? ", Rebuilding": "",
1034 (state
&8)? ", in-transition": "",
1035 (state
&16)? ", SMART errors": "",
1036 (state
&32)? ", Unrecovered Read Errors": "",
1037 (state
&64)? ", Missing" : "");
1038 printf(" Avail Size[%d] : %llu K\n", i
,
1039 __be64_to_cpu(pd
->config_size
)>>1);
1040 for (dl
= sb
->dlist
; dl
; dl
= dl
->next
) {
1041 if (dl
->disk
.refnum
== pd
->refnum
) {
1042 char *dv
= map_dev(dl
->major
, dl
->minor
, 0);
1044 printf(" Device[%d] : %s\n",
1052 static void examine_super_ddf(struct supertype
*st
, char *homehost
)
1054 struct ddf_super
*sb
= st
->sb
;
1056 printf(" Magic : %08x\n", __be32_to_cpu(sb
->anchor
.magic
));
1057 printf(" Version : %.8s\n", sb
->anchor
.revision
);
1058 printf("Controller GUID : "); print_guid(sb
->controller
.guid
, 0);
1060 printf(" Container GUID : "); print_guid(sb
->anchor
.guid
, 1);
1062 printf(" Seq : %08x\n", __be32_to_cpu(sb
->active
->seq
));
1063 printf(" Redundant hdr : %s\n", sb
->secondary
.magic
== DDF_HEADER_MAGIC
1069 static void brief_examine_super_ddf(struct supertype
*st
)
1071 /* We just write a generic DDF ARRAY entry
1072 * The uuid is all hex, 6 groups of 4 bytes
1074 struct ddf_super
*ddf
= st
->sb
;
1076 printf("ARRAY /dev/ddf UUID=");
1077 for (i
= 0; i
< DDF_GUID_LEN
; i
++) {
1078 printf("%02x", ddf
->anchor
.guid
[i
]);
1079 if ((i
&3) == 0 && i
!= 0)
1085 static void detail_super_ddf(struct supertype
*st
, char *homehost
)
1088 * Could print DDF GUID
1089 * Need to find which array
1090 * If whole, briefly list all arrays
1095 static void brief_detail_super_ddf(struct supertype
*st
)
1097 /* FIXME I really need to know which array we are detailing.
1098 * Can that be stored in ddf_super??
1100 // struct ddf_super *ddf = st->sb;
1106 static int match_home_ddf(struct supertype
*st
, char *homehost
)
1108 /* It matches 'this' host if the controller is a
1109 * Linux-MD controller with vendor_data matching
1112 struct ddf_super
*ddf
= st
->sb
;
1113 int len
= strlen(homehost
);
1115 return (memcmp(ddf
->controller
.guid
, T10
, 8) == 0 &&
1116 len
< sizeof(ddf
->controller
.vendor_data
) &&
1117 memcmp(ddf
->controller
.vendor_data
, homehost
,len
) == 0 &&
1118 ddf
->controller
.vendor_data
[len
] == 0);
1121 static struct vd_config
*find_vdcr(struct ddf_super
*ddf
, int inst
)
1124 if (inst
< 0 || inst
> __be16_to_cpu(ddf
->virt
->populated_vdes
))
1126 for (v
= ddf
->conflist
; v
; v
= v
->next
)
1127 if (memcmp(v
->conf
.guid
,
1128 ddf
->virt
->entries
[inst
].guid
,
1134 static int find_phys(struct ddf_super
*ddf
, __u32 phys_refnum
)
1136 /* Find the entry in phys_disk which has the given refnum
1137 * and return it's index
1140 for (i
=0; i
< __be16_to_cpu(ddf
->phys
->max_pdes
); i
++)
1141 if (ddf
->phys
->entries
[i
].refnum
== phys_refnum
)
1146 static void uuid_from_super_ddf(struct supertype
*st
, int uuid
[4])
1148 /* The uuid returned here is used for:
1149 * uuid to put into bitmap file (Create, Grow)
1150 * uuid for backup header when saving critical section (Grow)
1151 * comparing uuids when re-adding a device into an array
1152 * For each of these we can make do with a truncated
1153 * or hashed uuid rather than the original, as long as
1155 * In each case the uuid required is that of the data-array,
1156 * not the device-set.
1157 * In the case of SVD we assume the BVD is of interest,
1158 * though that might be the case if a bitmap were made for
1159 * a mirrored SVD - worry about that later.
1160 * So we need to find the VD configuration record for the
1161 * relevant BVD and extract the GUID and Secondary_Element_Seq.
1162 * The first 16 bytes of the sha1 of these is used.
1164 struct ddf_super
*ddf
= st
->sb
;
1165 struct vd_config
*vd
= find_vdcr(ddf
, st
->container_member
);
1168 memset(uuid
, 0, sizeof (uuid
));
1171 struct sha1_ctx ctx
;
1172 sha1_init_ctx(&ctx
);
1173 sha1_process_bytes(&vd
->guid
, DDF_GUID_LEN
, &ctx
);
1174 if (vd
->sec_elmnt_count
> 1)
1175 sha1_process_bytes(&vd
->sec_elmnt_seq
, 1, &ctx
);
1176 sha1_finish_ctx(&ctx
, buf
);
1177 memcpy(uuid
, buf
, sizeof(uuid
));
1181 static void getinfo_super_ddf(struct supertype
*st
, struct mdinfo
*info
)
1183 struct ddf_super
*ddf
= st
->sb
;
1186 info
->array
.major_version
= 1000;
1187 info
->array
.minor_version
= 0; /* FIXME use ddf->revision somehow */
1188 info
->array
.patch_version
= 0;
1189 info
->array
.raid_disks
= __be16_to_cpu(ddf
->phys
->used_pdes
);
1190 info
->array
.level
= LEVEL_CONTAINER
;
1191 info
->array
.layout
= 0;
1192 info
->array
.md_minor
= -1;
1193 info
->array
.ctime
= DECADE
+ __be32_to_cpu(*(__u32
*)
1194 (ddf
->anchor
.guid
+16));
1195 info
->array
.utime
= 0;
1196 info
->array
.chunk_size
= 0;
1198 // info->data_offset = ???;
1199 // info->component_size = ???;
1201 info
->disk
.major
= 0;
1202 info
->disk
.minor
= 0;
1203 info
->disk
.number
= __be32_to_cpu(ddf
->dlist
->disk
.refnum
);
1204 // info->disk.raid_disk = find refnum in the table and use index;
1205 info
->disk
.raid_disk
= -1;
1206 for (i
= 0; i
< __be16_to_cpu(ddf
->phys
->max_pdes
) ; i
++)
1207 if (ddf
->phys
->entries
[i
].refnum
== ddf
->dlist
->disk
.refnum
) {
1208 info
->disk
.raid_disk
= i
;
1211 info
->disk
.state
= (1 << MD_DISK_SYNC
);
1213 info
->reshape_active
= 0;
1215 // uuid_from_super_ddf(info->uuid, sbv);
1217 // info->name[] ?? ;
1220 static void getinfo_super_n_container(struct supertype
*st
, struct mdinfo
*info
)
1222 /* just need offset and size */
1223 struct ddf_super
*ddf
= st
->sb
;
1224 int n
= info
->disk
.number
;
1226 info
->data_offset
= __be64_to_cpu(ddf
->phys
->entries
[n
].config_size
);
1227 info
->component_size
= 32*1024*1024 / 512;
1230 static int rlq_to_layout(int rlq
, int prl
, int raiddisks
);
1232 static void getinfo_super_ddf_bvd(struct supertype
*st
, struct mdinfo
*info
)
1234 struct ddf_super
*ddf
= st
->sb
;
1235 struct vd_config
*vd
= find_vdcr(ddf
, info
->container_member
);
1237 /* FIXME this returns BVD info - what if we want SVD ?? */
1239 info
->array
.major_version
= 1000;
1240 info
->array
.minor_version
= 0; /* FIXME use ddf->revision somehow */
1241 info
->array
.patch_version
= 0;
1242 info
->array
.raid_disks
= __be16_to_cpu(vd
->prim_elmnt_count
);
1243 info
->array
.level
= map_num1(ddf_level_num
, vd
->prl
);
1244 info
->array
.layout
= rlq_to_layout(vd
->rlq
, vd
->prl
,
1245 info
->array
.raid_disks
);
1246 info
->array
.md_minor
= -1;
1247 info
->array
.ctime
= DECADE
+ __be32_to_cpu(*(__u32
*)(vd
->guid
+16));
1248 info
->array
.utime
= DECADE
+ __be32_to_cpu(vd
->timestamp
);
1249 info
->array
.chunk_size
= 512 << vd
->chunk_shift
;
1251 // info->data_offset = ???;
1252 // info->component_size = ???;
1254 info
->disk
.major
= 0;
1255 info
->disk
.minor
= 0;
1256 // info->disk.number = __be32_to_cpu(ddf->disk.refnum);
1257 // info->disk.raid_disk = find refnum in the table and use index;
1258 // info->disk.state = ???;
1260 uuid_from_super_ddf(st
, info
->uuid
);
1262 // info->name[] ?? ;
1265 static void getinfo_super_n_bvd(struct supertype
*st
, struct mdinfo
*info
)
1267 /* Find the particular details for info->disk.raid_disk.
1268 * This includes data_offset, component_size,
1270 struct ddf_super
*ddf
= st
->sb
;
1271 __u64
*lba_offset
= ddf
->newconf
->lba_offset
;
1272 struct vd_config
*conf
= &ddf
->newconf
->conf
;
1273 info
->data_offset
= __be64_to_cpu(lba_offset
[info
->disk
.raid_disk
]);
1274 info
->component_size
= __be64_to_cpu(conf
->blocks
);
1277 static int update_super_ddf(struct supertype
*st
, struct mdinfo
*info
,
1279 char *devname
, int verbose
,
1280 int uuid_set
, char *homehost
)
1282 /* For 'assemble' and 'force' we need to return non-zero if any
1283 * change was made. For others, the return value is ignored.
1284 * Update options are:
1285 * force-one : This device looks a bit old but needs to be included,
1286 * update age info appropriately.
1287 * assemble: clear any 'faulty' flag to allow this device to
1289 * force-array: Array is degraded but being forced, mark it clean
1290 * if that will be needed to assemble it.
1292 * newdev: not used ????
1293 * grow: Array has gained a new device - this is currently for
1295 * resync: mark as dirty so a resync will happen.
1296 * uuid: Change the uuid of the array to match watch is given
1297 * homehost: update the recorded homehost
1298 * name: update the name - preserving the homehost
1299 * _reshape_progress: record new reshape_progress position.
1301 * Following are not relevant for this version:
1302 * sparc2.2 : update from old dodgey metadata
1303 * super-minor: change the preferred_minor number
1304 * summaries: update redundant counters.
1307 // struct ddf_super *ddf = st->sb;
1308 // struct vd_config *vd = find_vdcr(ddf, info->container_member);
1309 // struct virtual_entry *ve = find_ve(ddf);
1312 /* we don't need to handle "force-*" or "assemble" as
1313 * there is no need to 'trick' the kernel. We the metadata is
1314 * first updated to activate the array, all the implied modifications
1318 if (strcmp(update
, "grow") == 0) {
1321 if (strcmp(update
, "resync") == 0) {
1322 // info->resync_checkpoint = 0;
1324 /* We ignore UUID updates as they make even less sense
1327 if (strcmp(update
, "homehost") == 0) {
1328 /* homehost is stored in controller->vendor_data,
1329 * or it is when we are the vendor
1331 // if (info->vendor_is_local)
1332 // strcpy(ddf->controller.vendor_data, homehost);
1334 if (strcmp(update
, "name") == 0) {
1335 /* name is stored in virtual_entry->name */
1336 // memset(ve->name, ' ', 16);
1337 // strncpy(ve->name, info->name, 16);
1339 if (strcmp(update
, "_reshape_progress") == 0) {
1340 /* We don't support reshape yet */
1343 // update_all_csum(ddf);
1348 static void make_header_guid(char *guid
)
1352 /* Create a DDF Header of Virtual Disk GUID */
1354 /* 24 bytes of fiction required.
1355 * first 8 are a 'vendor-id' - "Linux-MD"
1356 * next 8 are controller type.. how about 0X DEAD BEEF 0000 0000
1357 * Remaining 8 random number plus timestamp
1359 memcpy(guid
, T10
, sizeof(T10
));
1360 stamp
= __cpu_to_be32(0xdeadbeef);
1361 memcpy(guid
+8, &stamp
, 4);
1362 stamp
= __cpu_to_be32(0);
1363 memcpy(guid
+12, &stamp
, 4);
1364 stamp
= __cpu_to_be32(time(0) - DECADE
);
1365 memcpy(guid
+16, &stamp
, 4);
1366 rfd
= open("/dev/urandom", O_RDONLY
);
1367 if (rfd
< 0 || read(rfd
, &stamp
, 4) != 4)
1369 memcpy(guid
+20, &stamp
, 4);
1370 if (rfd
>= 0) close(rfd
);
1372 static int init_super_ddf(struct supertype
*st
,
1373 mdu_array_info_t
*info
,
1374 unsigned long long size
, char *name
, char *homehost
,
1377 /* This is primarily called by Create when creating a new array.
1378 * We will then get add_to_super called for each component, and then
1379 * write_init_super called to write it out to each device.
1380 * For DDF, Create can create on fresh devices or on a pre-existing
1382 * To create on a pre-existing array a different method will be called.
1383 * This one is just for fresh drives.
1385 * We need to create the entire 'ddf' structure which includes:
1386 * DDF headers - these are easy.
1387 * Controller data - a Sector describing this controller .. not that
1388 * this is a controller exactly.
1389 * Physical Disk Record - one entry per device, so
1390 * leave plenty of space.
1391 * Virtual Disk Records - again, just leave plenty of space.
1392 * This just lists VDs, doesn't give details
1393 * Config records - describes the VDs that use this disk
1394 * DiskData - describes 'this' device.
1395 * BadBlockManagement - empty
1396 * Diag Space - empty
1397 * Vendor Logs - Could we put bitmaps here?
1400 struct ddf_super
*ddf
;
1403 int max_phys_disks
, max_virt_disks
;
1404 unsigned long long sector
;
1408 struct phys_disk
*pd
;
1409 struct virtual_disk
*vd
;
1411 ddf
= malloc(sizeof(*ddf
));
1412 ddf
->dlist
= NULL
; /* no physical disks yet */
1413 ddf
->conflist
= NULL
; /* No virtual disks yet */
1415 /* At least 32MB *must* be reserved for the ddf. So let's just
1416 * start 32MB from the end, and put the primary header there.
1417 * Don't do secondary for now.
1418 * We don't know exactly where that will be yet as it could be
1419 * different on each device. To just set up the lengths.
1423 ddf
->anchor
.magic
= DDF_HEADER_MAGIC
;
1424 make_header_guid(ddf
->anchor
.guid
);
1426 memcpy(ddf
->anchor
.revision
, DDF_REVISION
, 8);
1427 ddf
->anchor
.seq
= __cpu_to_be32(1);
1428 ddf
->anchor
.timestamp
= __cpu_to_be32(time(0) - DECADE
);
1429 ddf
->anchor
.openflag
= 0xFF;
1430 ddf
->anchor
.foreignflag
= 0;
1431 ddf
->anchor
.enforcegroups
= 0; /* Is this best?? */
1432 ddf
->anchor
.pad0
= 0xff;
1433 memset(ddf
->anchor
.pad1
, 0xff, 12);
1434 memset(ddf
->anchor
.header_ext
, 0xff, 32);
1435 ddf
->anchor
.primary_lba
= ~(__u64
)0;
1436 ddf
->anchor
.secondary_lba
= ~(__u64
)0;
1437 ddf
->anchor
.type
= DDF_HEADER_ANCHOR
;
1438 memset(ddf
->anchor
.pad2
, 0xff, 3);
1439 ddf
->anchor
.workspace_len
= __cpu_to_be32(32768); /* Must be reserved */
1440 ddf
->anchor
.workspace_lba
= ~(__u64
)0; /* Put this at bottom
1441 of 32M reserved.. */
1442 max_phys_disks
= 1023; /* Should be enough */
1443 ddf
->anchor
.max_pd_entries
= __cpu_to_be16(max_phys_disks
);
1444 max_virt_disks
= 255;
1445 ddf
->anchor
.max_vd_entries
= __cpu_to_be16(max_virt_disks
); /* ?? */
1446 ddf
->anchor
.max_partitions
= __cpu_to_be16(64); /* ?? */
1448 ddf
->anchor
.config_record_len
= __cpu_to_be16(1 + 256*12/512);
1449 ddf
->anchor
.max_primary_element_entries
= __cpu_to_be16(256);
1450 memset(ddf
->anchor
.pad3
, 0xff, 54);
1452 /* controller sections is one sector long immediately
1453 * after the ddf header */
1455 ddf
->anchor
.controller_section_offset
= __cpu_to_be32(sector
);
1456 ddf
->anchor
.controller_section_length
= __cpu_to_be32(1);
1459 /* phys is 8 sectors after that */
1460 pdsize
= ROUND_UP(sizeof(struct phys_disk
) +
1461 sizeof(struct phys_disk_entry
)*max_phys_disks
,
1463 switch(pdsize
/512) {
1464 case 2: case 8: case 32: case 128: case 512: break;
1467 ddf
->anchor
.phys_section_offset
= __cpu_to_be32(sector
);
1468 ddf
->anchor
.phys_section_length
=
1469 __cpu_to_be32(pdsize
/512); /* max_primary_element_entries/8 */
1470 sector
+= pdsize
/512;
1472 /* virt is another 32 sectors */
1473 vdsize
= ROUND_UP(sizeof(struct virtual_disk
) +
1474 sizeof(struct virtual_entry
) * max_virt_disks
,
1476 switch(vdsize
/512) {
1477 case 2: case 8: case 32: case 128: case 512: break;
1480 ddf
->anchor
.virt_section_offset
= __cpu_to_be32(sector
);
1481 ddf
->anchor
.virt_section_length
=
1482 __cpu_to_be32(vdsize
/512); /* max_vd_entries/8 */
1483 sector
+= vdsize
/512;
1485 clen
= (1 + 256*12/512) * (64+1);
1486 ddf
->anchor
.config_section_offset
= __cpu_to_be32(sector
);
1487 ddf
->anchor
.config_section_length
= __cpu_to_be32(clen
);
1490 ddf
->anchor
.data_section_offset
= __cpu_to_be32(sector
);
1491 ddf
->anchor
.data_section_length
= __cpu_to_be32(1);
1494 ddf
->anchor
.bbm_section_length
= __cpu_to_be32(0);
1495 ddf
->anchor
.bbm_section_offset
= __cpu_to_be32(0xFFFFFFFF);
1496 ddf
->anchor
.diag_space_length
= __cpu_to_be32(0);
1497 ddf
->anchor
.diag_space_offset
= __cpu_to_be32(0xFFFFFFFF);
1498 ddf
->anchor
.vendor_length
= __cpu_to_be32(0);
1499 ddf
->anchor
.vendor_offset
= __cpu_to_be32(0xFFFFFFFF);
1501 memset(ddf
->anchor
.pad4
, 0xff, 256);
1503 memcpy(&ddf
->primary
, &ddf
->anchor
, 512);
1504 memcpy(&ddf
->secondary
, &ddf
->anchor
, 512);
1506 ddf
->primary
.openflag
= 1; /* I guess.. */
1507 ddf
->primary
.type
= DDF_HEADER_PRIMARY
;
1509 ddf
->secondary
.openflag
= 1; /* I guess.. */
1510 ddf
->secondary
.type
= DDF_HEADER_SECONDARY
;
1512 ddf
->active
= &ddf
->primary
;
1514 ddf
->controller
.magic
= DDF_CONTROLLER_MAGIC
;
1516 /* 24 more bytes of fiction required.
1517 * first 8 are a 'vendor-id' - "Linux-MD"
1518 * Remaining 16 are serial number.... maybe a hostname would do?
1520 memcpy(ddf
->controller
.guid
, T10
, sizeof(T10
));
1521 gethostname(hostname
, 17);
1523 hostlen
= strlen(hostname
);
1524 memcpy(ddf
->controller
.guid
+ 24 - hostlen
, hostname
, hostlen
);
1525 for (i
= strlen(T10
) ; i
+hostlen
< 24; i
++)
1526 ddf
->controller
.guid
[i
] = ' ';
1528 ddf
->controller
.type
.vendor_id
= __cpu_to_be16(0xDEAD);
1529 ddf
->controller
.type
.device_id
= __cpu_to_be16(0xBEEF);
1530 ddf
->controller
.type
.sub_vendor_id
= 0;
1531 ddf
->controller
.type
.sub_device_id
= 0;
1532 memcpy(ddf
->controller
.product_id
, "What Is My PID??", 16);
1533 memset(ddf
->controller
.pad
, 0xff, 8);
1534 memset(ddf
->controller
.vendor_data
, 0xff, 448);
1536 pd
= ddf
->phys
= malloc(pdsize
);
1537 ddf
->pdsize
= pdsize
;
1539 memset(pd
, 0xff, pdsize
);
1540 memset(pd
, 0, sizeof(*pd
));
1541 pd
->magic
= DDF_PHYS_DATA_MAGIC
;
1542 pd
->used_pdes
= __cpu_to_be16(0);
1543 pd
->max_pdes
= __cpu_to_be16(max_phys_disks
);
1544 memset(pd
->pad
, 0xff, 52);
1546 vd
= ddf
->virt
= malloc(vdsize
);
1547 ddf
->vdsize
= vdsize
;
1548 memset(vd
, 0, vdsize
);
1549 vd
->magic
= DDF_VIRT_RECORDS_MAGIC
;
1550 vd
->populated_vdes
= __cpu_to_be16(0);
1551 vd
->max_vdes
= __cpu_to_be16(max_virt_disks
);
1552 memset(vd
->pad
, 0xff, 52);
1554 for (i
=0; i
<max_virt_disks
; i
++)
1555 memset(&vd
->entries
[i
], 0xff, sizeof(struct virtual_entry
));
1561 static int all_ff(char *guid
)
1564 for (i
= 0; i
< DDF_GUID_LEN
; i
++)
1565 if (guid
[i
] != (char)0xff)
1569 static int chunk_to_shift(int chunksize
)
1571 return ffs(chunksize
/512)-1;
1574 static int level_to_prl(int level
)
1577 case LEVEL_LINEAR
: return DDF_CONCAT
;
1578 case 0: return DDF_RAID0
;
1579 case 1: return DDF_RAID1
;
1580 case 4: return DDF_RAID4
;
1581 case 5: return DDF_RAID5
;
1582 case 6: return DDF_RAID6
;
1586 static int layout_to_rlq(int level
, int layout
, int raiddisks
)
1590 return DDF_RAID0_SIMPLE
;
1593 case 2: return DDF_RAID1_SIMPLE
;
1594 case 3: return DDF_RAID1_MULTI
;
1599 case 0: return DDF_RAID4_N
;
1605 case ALGORITHM_LEFT_ASYMMETRIC
:
1606 return DDF_RAID5_N_RESTART
;
1607 case ALGORITHM_RIGHT_ASYMMETRIC
:
1608 return DDF_RAID5_0_RESTART
;
1609 case ALGORITHM_LEFT_SYMMETRIC
:
1610 return DDF_RAID5_N_CONTINUE
;
1611 case ALGORITHM_RIGHT_SYMMETRIC
:
1612 return -1; /* not mentioned in standard */
1618 static int rlq_to_layout(int rlq
, int prl
, int raiddisks
)
1622 return 0; /* hopefully rlq == DDF_RAID0_SIMPLE */
1624 return 0; /* hopefully rlq == SIMPLE or MULTI depending
1632 return -1; /* FIXME this isn't checked */
1637 case DDF_RAID5_N_RESTART
:
1638 return ALGORITHM_LEFT_ASYMMETRIC
;
1639 case DDF_RAID5_0_RESTART
:
1640 return ALGORITHM_RIGHT_ASYMMETRIC
;
1641 case DDF_RAID5_N_CONTINUE
:
1642 return ALGORITHM_LEFT_SYMMETRIC
;
1650 static int init_super_ddf_bvd(struct supertype
*st
,
1651 mdu_array_info_t
*info
,
1652 unsigned long long size
,
1653 char *name
, char *homehost
,
1656 /* We are creating a BVD inside a pre-existing container.
1657 * so st->sb is already set.
1658 * We need to create a new vd_config and a new virtual_entry
1660 struct ddf_super
*ddf
= st
->sb
;
1662 struct virtual_entry
*ve
;
1664 struct vd_config
*vc
;
1668 if (__be16_to_cpu(ddf
->virt
->populated_vdes
)
1669 >= __be16_to_cpu(ddf
->virt
->max_vdes
)) {
1670 fprintf(stderr
, Name
": This ddf already has the "
1671 "maximum of %d virtual devices\n",
1672 __be16_to_cpu(ddf
->virt
->max_vdes
));
1676 for (venum
= 0; venum
< __be16_to_cpu(ddf
->virt
->max_vdes
); venum
++)
1677 if (all_ff(ddf
->virt
->entries
[venum
].guid
))
1679 if (venum
== __be16_to_cpu(ddf
->virt
->max_vdes
)) {
1680 fprintf(stderr
, Name
": Cannot find spare slot for "
1681 "virtual disk - DDF is corrupt\n");
1684 ve
= &ddf
->virt
->entries
[venum
];
1685 st
->container_member
= venum
;
1687 /* A Virtual Disk GUID contains the T10 Vendor ID, controller type,
1688 * timestamp, random number
1690 make_header_guid(ve
->guid
);
1691 ve
->unit
= __cpu_to_be16(info
->md_minor
);
1693 ve
->guid_crc
= crc32(0, (unsigned char*)ddf
->anchor
.guid
, DDF_GUID_LEN
);
1695 ve
->state
= DDF_state_degraded
; /* Will be modified as devices are added */
1696 if (info
->state
& 1) /* clean */
1697 ve
->init_state
= DDF_init_full
;
1699 ve
->init_state
= DDF_init_not
;
1701 memset(ve
->pad1
, 0xff, 14);
1702 memset(ve
->name
, ' ', 16);
1704 strncpy(ve
->name
, name
, 16);
1705 ddf
->virt
->populated_vdes
=
1706 __cpu_to_be16(__be16_to_cpu(ddf
->virt
->populated_vdes
)+1);
1708 /* Now create a new vd_config */
1709 conflen
= __be16_to_cpu(ddf
->active
->config_record_len
);
1710 vcl
= malloc(offsetof(struct vcl
, conf
) + conflen
* 512);
1711 mppe
= __be16_to_cpu(ddf
->anchor
.max_primary_element_entries
);
1712 vcl
->lba_offset
= (__u64
*) &vcl
->conf
.phys_refnum
[mppe
];
1716 vc
->magic
= DDF_VD_CONF_MAGIC
;
1717 memcpy(vc
->guid
, ve
->guid
, DDF_GUID_LEN
);
1718 vc
->timestamp
= __cpu_to_be32(time(0)-DECADE
);
1719 vc
->seqnum
= __cpu_to_be32(1);
1720 memset(vc
->pad0
, 0xff, 24);
1721 vc
->prim_elmnt_count
= __cpu_to_be16(info
->raid_disks
);
1722 vc
->chunk_shift
= chunk_to_shift(info
->chunk_size
);
1723 vc
->prl
= level_to_prl(info
->level
);
1724 vc
->rlq
= layout_to_rlq(info
->level
, info
->layout
, info
->raid_disks
);
1725 vc
->sec_elmnt_count
= 1;
1726 vc
->sec_elmnt_seq
= 0;
1728 vc
->blocks
= __cpu_to_be64(info
->size
* 2);
1729 vc
->array_blocks
= __cpu_to_be64(
1730 calc_array_size(info
->level
, info
->raid_disks
, info
->layout
,
1731 info
->chunk_size
, info
->size
*2));
1732 memset(vc
->pad1
, 0xff, 8);
1733 vc
->spare_refs
[0] = 0xffffffff;
1734 vc
->spare_refs
[1] = 0xffffffff;
1735 vc
->spare_refs
[2] = 0xffffffff;
1736 vc
->spare_refs
[3] = 0xffffffff;
1737 vc
->spare_refs
[4] = 0xffffffff;
1738 vc
->spare_refs
[5] = 0xffffffff;
1739 vc
->spare_refs
[6] = 0xffffffff;
1740 vc
->spare_refs
[7] = 0xffffffff;
1741 memset(vc
->cache_pol
, 0, 8);
1743 memset(vc
->pad2
, 0xff, 3);
1744 memset(vc
->pad3
, 0xff, 52);
1745 memset(vc
->pad4
, 0xff, 192);
1746 memset(vc
->v0
, 0xff, 32);
1747 memset(vc
->v1
, 0xff, 32);
1748 memset(vc
->v2
, 0xff, 16);
1749 memset(vc
->v3
, 0xff, 16);
1750 memset(vc
->vendor
, 0xff, 32);
1752 memset(vc
->phys_refnum
, 0xff, 4*mppe
);
1753 memset(vc
->phys_refnum
+mppe
, 0x00, 8*mppe
);
1755 vcl
->next
= ddf
->conflist
;
1756 ddf
->conflist
= vcl
;
1761 static void add_to_super_ddf_bvd(struct supertype
*st
,
1762 mdu_disk_info_t
*dk
, int fd
, char *devname
)
1764 /* fd and devname identify a device with-in the ddf container (st).
1765 * dk identifies a location in the new BVD.
1766 * We need to find suitable free space in that device and update
1767 * the phys_refnum and lba_offset for the newly created vd_config.
1768 * We might also want to update the type in the phys_disk
1772 struct ddf_super
*ddf
= st
->sb
;
1773 struct vd_config
*vc
;
1778 for (dl
= ddf
->dlist
; dl
; dl
= dl
->next
)
1779 if (dl
->major
== dk
->major
&&
1780 dl
->minor
== dk
->minor
)
1782 if (!dl
|| ! (dk
->state
& (1<<MD_DISK_SYNC
)))
1785 vc
= &ddf
->newconf
->conf
;
1786 vc
->phys_refnum
[dk
->raid_disk
] = dl
->disk
.refnum
;
1787 mppe
= __be16_to_cpu(ddf
->anchor
.max_primary_element_entries
);
1788 lba_offset
= (__u64
*)(vc
->phys_refnum
+ mppe
);
1789 lba_offset
[dk
->raid_disk
] = 0; /* FIXME */
1791 dl
->vlist
[0] = ddf
->newconf
; /* FIXME */
1794 dl
->devname
= devname
;
1796 /* Check how many working raid_disks, and if we can mark
1797 * array as optimal yet
1801 for (i
=0; i
< __be16_to_cpu(vc
->prim_elmnt_count
); i
++)
1802 if (vc
->phys_refnum
[i
] != 0xffffffff)
1804 if (working
== __be16_to_cpu(vc
->prim_elmnt_count
))
1805 ->entries
[xx
].state
= (->entries
[xx
].state
& ~DDF_state_mask
)
1806 | DDF_state_optimal
;
1808 if (vc
->prl
== DDF_RAID6
&&
1809 working
+1 == __be16_to_cpu(vc
->prim_elmnt_count
))
1810 ->entries
[xx
].state
= (->entries
[xx
].state
& ~DDF_state_mask
)
1811 | DDF_state_part_optimal
;
1815 /* add a device to a container, either while creating it or while
1816 * expanding a pre-existing container
1818 static void add_to_super_ddf(struct supertype
*st
,
1819 mdu_disk_info_t
*dk
, int fd
, char *devname
)
1821 struct ddf_super
*ddf
= st
->sb
;
1825 unsigned long long size
;
1826 struct phys_disk_entry
*pde
;
1830 /* This is device numbered dk->number. We need to create
1831 * a phys_disk entry and a more detailed disk_data entry.
1834 dd
= malloc(sizeof(*dd
) + sizeof(dd
->vlist
[0]) * (ddf
->max_part
+1));
1835 dd
->major
= major(stb
.st_rdev
);
1836 dd
->minor
= minor(stb
.st_rdev
);
1837 dd
->devname
= devname
;
1838 dd
->next
= ddf
->dlist
;
1841 dd
->disk
.magic
= DDF_PHYS_DATA_MAGIC
;
1843 tm
= localtime(&now
);
1844 sprintf(dd
->disk
.guid
, "%8s%04d%02d%02d",
1845 T10
, tm
->tm_year
+1900, tm
->tm_mon
+1, tm
->tm_mday
);
1846 *(__u32
*)(dd
->disk
.guid
+ 16) = random();
1847 *(__u32
*)(dd
->disk
.guid
+ 20) = random();
1849 dd
->disk
.refnum
= random(); /* and hope for the best FIXME check this is unique!!*/
1850 dd
->disk
.forced_ref
= 1;
1851 dd
->disk
.forced_guid
= 1;
1852 memset(dd
->disk
.vendor
, ' ', 32);
1853 memcpy(dd
->disk
.vendor
, "Linux", 5);
1854 memset(dd
->disk
.pad
, 0xff, 442);
1855 for (i
= 0; i
< ddf
->max_part
+1 ; i
++)
1856 dd
->vlist
[i
] = NULL
;
1858 n
= __be16_to_cpu(ddf
->phys
->used_pdes
);
1859 pde
= &ddf
->phys
->entries
[n
];
1861 ddf
->phys
->used_pdes
= __cpu_to_be16(n
);
1863 memcpy(pde
->guid
, dd
->disk
.guid
, DDF_GUID_LEN
);
1864 pde
->refnum
= dd
->disk
.refnum
;
1865 pde
->type
= __cpu_to_be16(DDF_Forced_PD_GUID
|DDF_Global_Spare
);
1866 pde
->state
= __cpu_to_be16(DDF_Online
);
1867 get_dev_size(fd
, NULL
, &size
);
1868 /* We are required to reserve 32Meg, and record the size in sectors */
1869 pde
->config_size
= __cpu_to_be64( (size
- 32*1024*1024) / 512);
1870 sprintf(pde
->path
, "%17.17s","Information: nil") ;
1871 memset(pde
->pad
, 0xff, 6);
1877 * This is the write_init_super method for a ddf container. It is
1878 * called when creating a container or adding another device to a
1883 static int __write_init_super_ddf(struct supertype
*st
, int do_close
)
1886 struct ddf_super
*ddf
= st
->sb
;
1892 unsigned long long size
, sector
;
1894 for (d
= ddf
->dlist
; d
; d
=d
->next
) {
1900 /* We need to fill in the primary, (secondary) and workspace
1901 * lba's in the headers, set their checksums,
1902 * Also checksum phys, virt....
1904 * Then write everything out, finally the anchor is written.
1906 get_dev_size(fd
, NULL
, &size
);
1908 ddf
->anchor
.workspace_lba
= __cpu_to_be64(size
- 32*1024*2);
1909 ddf
->anchor
.primary_lba
= __cpu_to_be64(size
- 16*1024*2);
1910 ddf
->anchor
.seq
= __cpu_to_be32(1);
1911 memcpy(&ddf
->primary
, &ddf
->anchor
, 512);
1912 memcpy(&ddf
->secondary
, &ddf
->anchor
, 512);
1914 ddf
->anchor
.openflag
= 0xFF; /* 'open' means nothing */
1915 ddf
->anchor
.seq
= 0xFFFFFFFF; /* no sequencing in anchor */
1916 ddf
->anchor
.crc
= calc_crc(&ddf
->anchor
, 512);
1918 ddf
->primary
.openflag
= 0;
1919 ddf
->primary
.type
= DDF_HEADER_PRIMARY
;
1921 ddf
->secondary
.openflag
= 0;
1922 ddf
->secondary
.type
= DDF_HEADER_SECONDARY
;
1924 ddf
->primary
.crc
= calc_crc(&ddf
->primary
, 512);
1925 ddf
->secondary
.crc
= calc_crc(&ddf
->secondary
, 512);
1927 sector
= size
- 16*1024*2;
1928 lseek64(fd
, sector
<<9, 0);
1929 write(fd
, &ddf
->primary
, 512);
1931 ddf
->controller
.crc
= calc_crc(&ddf
->controller
, 512);
1932 write(fd
, &ddf
->controller
, 512);
1934 ddf
->phys
->crc
= calc_crc(ddf
->phys
, ddf
->pdsize
);
1936 write(fd
, ddf
->phys
, ddf
->pdsize
);
1938 ddf
->virt
->crc
= calc_crc(ddf
->virt
, ddf
->vdsize
);
1939 write(fd
, ddf
->virt
, ddf
->vdsize
);
1941 /* Now write lots of config records. */
1942 n_config
= __be16_to_cpu(ddf
->active
->max_partitions
);
1943 conf_size
= __be16_to_cpu(ddf
->active
->config_record_len
) * 512;
1944 for (i
= 0 ; i
<= n_config
; i
++) {
1945 struct vcl
*c
= d
->vlist
[i
];
1948 c
->conf
.crc
= calc_crc(&c
->conf
, conf_size
);
1949 write(fd
, &c
->conf
, conf_size
);
1951 __u32 sig
= 0xffffffff;
1953 lseek64(fd
, conf_size
-4, SEEK_CUR
);
1956 d
->disk
.crc
= calc_crc(&d
->disk
, 512);
1957 write(fd
, &d
->disk
, 512);
1959 /* Maybe do the same for secondary */
1961 lseek64(fd
, (size
-1)*512, SEEK_SET
);
1962 write(fd
, &ddf
->anchor
, 512);
1971 static int write_init_super_ddf(struct supertype
*st
)
1973 return __write_init_super_ddf(st
, 1);
1978 static __u64
avail_size_ddf(struct supertype
*st
, __u64 devsize
)
1980 /* We must reserve the last 32Meg */
1981 if (devsize
<= 32*1024*2)
1983 return devsize
- 32*1024*2;
1987 int validate_geometry_ddf(struct supertype
*st
,
1988 int level
, int layout
, int raiddisks
,
1989 int chunk
, unsigned long long size
,
1990 char *dev
, unsigned long long *freesize
)
1996 /* ddf potentially supports lots of things, but it depends on
1997 * what devices are offered (and maybe kernel version?)
1998 * If given unused devices, we will make a container.
1999 * If given devices in a container, we will make a BVD.
2000 * If given BVDs, we make an SVD, changing all the GUIDs in the process.
2003 if (level
== LEVEL_CONTAINER
) {
2004 st
->ss
= &super_ddf_container
;
2006 int rv
=st
->ss
->validate_geometry(st
, level
, layout
,
2013 return st
->ss
->validate_geometry(st
, level
, layout
, raiddisks
,
2014 chunk
, size
, dev
, freesize
);
2018 /* creating in a given container */
2019 st
->ss
= &super_ddf_bvd
;
2021 int rv
=st
->ss
->validate_geometry(st
, level
, layout
,
2028 return st
->ss
->validate_geometry(st
, level
, layout
, raiddisks
,
2029 chunk
, size
, dev
, freesize
);
2031 /* FIXME should exclude MULTIPATH, or more appropriately, allow
2032 * only known levels.
2037 /* This device needs to be either a device in a 'ddf' container,
2038 * or it needs to be a 'ddf-bvd' array.
2041 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2043 sra
= sysfs_read(fd
, 0, GET_VERSION
);
2045 if (sra
&& sra
->array
.major_version
== -1 &&
2046 strcmp(sra
->text_version
, "ddf-bvd") == 0) {
2047 st
->ss
= &super_ddf_svd
;
2048 return st
->ss
->validate_geometry(st
, level
, layout
,
2049 raiddisks
, chunk
, size
,
2054 Name
": Cannot create this array on device %s\n",
2058 if (errno
!= EBUSY
|| (fd
= open(dev
, O_RDONLY
, 0)) < 0) {
2059 fprintf(stderr
, Name
": Cannot open %s: %s\n",
2060 dev
, strerror(errno
));
2063 /* Well, it is in use by someone, maybe a 'ddf' container. */
2064 cfd
= open_container(fd
);
2067 fprintf(stderr
, Name
": Cannot use %s: It is busy\n",
2071 sra
= sysfs_read(cfd
, 0, GET_VERSION
);
2073 if (sra
&& sra
->array
.major_version
== -1 &&
2074 strcmp(sra
->text_version
, "ddf") == 0) {
2075 /* This is a member of a ddf container. Load the container
2076 * and try to create a bvd
2078 struct ddf_super
*ddf
;
2079 st
->ss
= &super_ddf_bvd
;
2080 if (load_super_ddf_all(st
, cfd
, (void **)&ddf
, NULL
, 1) == 0) {
2082 st
->container_dev
= fd2devnum(cfd
);
2083 st
->container_member
= 27; // FIXME
2085 return st
->ss
->validate_geometry(st
, level
, layout
,
2086 raiddisks
, chunk
, size
,
2091 fprintf(stderr
, Name
": Cannot use %s: Already in use\n",
2096 int validate_geometry_ddf_container(struct supertype
*st
,
2097 int level
, int layout
, int raiddisks
,
2098 int chunk
, unsigned long long size
,
2099 char *dev
, unsigned long long *freesize
)
2102 unsigned long long ldsize
;
2104 if (level
!= LEVEL_CONTAINER
)
2109 fd
= open(dev
, O_RDONLY
|O_EXCL
, 0);
2111 fprintf(stderr
, Name
": Cannot open %s: %s\n",
2112 dev
, strerror(errno
));
2115 if (!get_dev_size(fd
, dev
, &ldsize
)) {
2121 *freesize
= avail_size_ddf(st
, ldsize
);
2127 unsigned long long start
, size
;
2129 int cmp_extent(const void *av
, const void *bv
)
2131 const struct extent
*a
= av
;
2132 const struct extent
*b
= bv
;
2133 if (a
->start
< b
->start
)
2135 if (a
->start
> b
->start
)
2140 struct extent
*get_extents(struct ddf_super
*ddf
, struct dl
*dl
)
2142 /* find a list of used extents on the give physical device
2143 * (dnum) or the given ddf.
2144 * Return a malloced array of 'struct extent'
2146 FIXME ignore DDF_Legacy devices?
2154 for (dnum
= 0; dnum
< ddf
->phys
->used_pdes
; dnum
++)
2155 if (memcmp(dl
->disk
.guid
,
2156 ddf
->phys
->entries
[dnum
].guid
,
2160 if (dnum
== ddf
->phys
->used_pdes
)
2163 rv
= malloc(sizeof(struct extent
) * (ddf
->max_part
+ 2));
2167 for (i
= 0; i
< ddf
->max_part
+1; i
++) {
2168 struct vcl
*v
= dl
->vlist
[i
];
2171 for (j
=0; j
< v
->conf
.prim_elmnt_count
; j
++)
2172 if (v
->conf
.phys_refnum
[j
] == dl
->disk
.refnum
) {
2173 /* This device plays role 'j' in 'v'. */
2174 rv
[n
].start
= __be64_to_cpu(v
->lba_offset
[j
]);
2175 rv
[n
].size
= __be64_to_cpu(v
->conf
.blocks
);
2180 qsort(rv
, n
, sizeof(*rv
), cmp_extent
);
2182 rv
[n
].start
= __be64_to_cpu(ddf
->phys
->entries
[dnum
].config_size
);
2187 int validate_geometry_ddf_bvd(struct supertype
*st
,
2188 int level
, int layout
, int raiddisks
,
2189 int chunk
, unsigned long long size
,
2190 char *dev
, unsigned long long *freesize
)
2193 struct ddf_super
*ddf
= st
->sb
;
2195 unsigned long long pos
= 0;
2196 unsigned long long maxsize
;
2199 /* ddf/bvd supports lots of things, but not containers */
2200 if (level
== LEVEL_CONTAINER
)
2202 /* We must have the container info already read in. */
2207 /* General test: make sure there is space for
2208 * 'raiddisks' device extents of size 'size'.
2210 unsigned long long minsize
= size
;
2214 for (dl
= ddf
->dlist
; dl
; dl
= dl
->next
)
2219 e
= get_extents(ddf
, dl
);
2222 unsigned long long esize
;
2223 esize
= e
[i
].start
- pos
;
2224 if (esize
>= minsize
)
2226 pos
= e
[i
].start
+ e
[i
].size
;
2228 } while (e
[i
-1].size
);
2233 if (dcnt
< raiddisks
) {
2234 fprintf(stderr
, Name
": Not enough devices with space "
2235 "for this array (%d < %d)\n",
2241 /* This device must be a member of the set */
2242 if (stat(dev
, &stb
) < 0)
2244 if ((S_IFMT
& stb
.st_mode
) != S_IFBLK
)
2246 for (dl
= ddf
->dlist
; dl
; dl
= dl
->next
) {
2247 if (dl
->major
== major(stb
.st_rdev
) &&
2248 dl
->minor
== minor(stb
.st_rdev
))
2252 fprintf(stderr
, Name
": %s is not in the same DDF set\n",
2256 e
= get_extents(ddf
, dl
);
2260 unsigned long long esize
;
2261 esize
= e
[i
].start
- pos
;
2262 if (esize
>= maxsize
)
2264 pos
= e
[i
].start
+ e
[i
].size
;
2266 } while (e
[i
-1].size
);
2267 *freesize
= maxsize
;
2272 int validate_geometry_ddf_svd(struct supertype
*st
,
2273 int level
, int layout
, int raiddisks
,
2274 int chunk
, unsigned long long size
,
2275 char *dev
, unsigned long long *freesize
)
2277 /* dd/svd only supports striped, mirrored, concat, spanned... */
2278 if (level
!= LEVEL_LINEAR
&&
2286 static int load_super_ddf_all(struct supertype
*st
, int fd
,
2287 void **sbp
, char *devname
, int keep_fd
)
2290 struct ddf_super
*super
;
2291 struct mdinfo
*sd
, *best
= NULL
;
2297 sra
= sysfs_read(fd
, 0, GET_LEVEL
|GET_VERSION
|GET_DEVS
|GET_STATE
);
2300 if (sra
->array
.major_version
!= -1 ||
2301 sra
->array
.minor_version
!= -2 ||
2302 strcmp(sra
->text_version
, "ddf") != 0)
2305 super
= malloc(sizeof(*super
));
2308 memset(super
, 0, sizeof(*super
));
2310 /* first, try each device, and choose the best ddf */
2311 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
2313 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
2314 dfd
= dev_open(nm
, O_RDONLY
);
2317 rv
= load_ddf_headers(dfd
, super
, NULL
);
2320 seq
= __be32_to_cpu(super
->active
->seq
);
2321 if (super
->active
->openflag
)
2323 if (!best
|| seq
> bestseq
) {
2331 /* OK, load this ddf */
2332 sprintf(nm
, "%d:%d", best
->disk
.major
, best
->disk
.minor
);
2333 dfd
= dev_open(nm
, O_RDONLY
);
2336 load_ddf_headers(dfd
, super
, NULL
);
2337 load_ddf_global(dfd
, super
, NULL
);
2339 /* Now we need the device-local bits */
2340 for (sd
= sra
->devs
; sd
; sd
= sd
->next
) {
2341 sprintf(nm
, "%d:%d", sd
->disk
.major
, sd
->disk
.minor
);
2342 dfd
= dev_open(nm
, keep_fd
? O_RDWR
: O_RDONLY
);
2345 seq
= load_ddf_local(dfd
, super
, NULL
, keep_fd
);
2346 if (!keep_fd
) close(dfd
);
2349 if (st
->ss
== NULL
) {
2350 st
->ss
= &super_ddf_container
;
2351 st
->minor_version
= 0;
2353 st
->container_dev
= fd2devnum(fd
);
2361 static struct mdinfo
*container_content_ddf(struct supertype
*st
)
2363 /* Given a container loaded by load_super_ddf_all,
2364 * extract information about all the arrays into
2367 * For each vcl in conflist: create an mdinfo, fill it in,
2368 * then look for matching devices (phys_refnum) in dlist
2369 * and create appropriate device mdinfo.
2371 struct ddf_super
*ddf
= st
->sb
;
2372 struct mdinfo
*rest
= NULL
;
2375 for (vc
= ddf
->conflist
; vc
; vc
=vc
->next
)
2379 struct mdinfo
*this;
2380 this = malloc(sizeof(*this));
2381 memset(this, 0, sizeof(*this));
2385 this->array
.major_version
= 1000;
2386 this->array
.minor_version
= 0;
2387 this->array
.patch_version
= 0;
2388 this->array
.level
= map_num1(ddf_level_num
, vc
->conf
.prl
);
2389 this->array
.raid_disks
=
2390 __be16_to_cpu(vc
->conf
.prim_elmnt_count
);
2391 /* FIXME this should be mapped */
2392 this->array
.layout
= vc
->conf
.rlq
;
2393 this->array
.md_minor
= -1;
2394 this->array
.ctime
= DECADE
+
2395 __be32_to_cpu(*(__u32
*)(vc
->conf
.guid
+16));
2396 this->array
.utime
= DECADE
+
2397 __be32_to_cpu(vc
->conf
.timestamp
);
2398 this->array
.chunk_size
= 512 << vc
->conf
.chunk_shift
;
2400 for (i
=0; i
< __be16_to_cpu(ddf
->virt
->populated_vdes
); i
++)
2401 if (memcmp(ddf
->virt
->entries
[i
].guid
,
2402 vc
->conf
.guid
, DDF_GUID_LEN
) == 0)
2404 if ((ddf
->virt
->entries
[i
].state
& DDF_state_inconsistent
) ||
2405 (ddf
->virt
->entries
[i
].init_state
& DDF_initstate_mask
) !=
2407 this->array
.state
= 0;
2408 this->resync_start
= 0;
2410 this->array
.state
= 1;
2411 this->resync_start
= ~0ULL;
2413 memcpy(this->name
, ddf
->virt
->entries
[i
].name
, 32);
2416 memset(this->uuid
, 0, sizeof(this->uuid
));
2417 this->component_size
= __be64_to_cpu(vc
->conf
.blocks
);
2418 this->array
.size
= this->component_size
/ 2;
2419 this->container_member
= i
;
2421 mppe
= __be16_to_cpu(ddf
->anchor
.max_primary_element_entries
);
2422 for (i
=0 ; i
< mppe
; i
++) {
2426 if (vc
->conf
.phys_refnum
[i
] == 0xFFFFFFFF)
2429 this->array
.working_disks
++;
2431 for (d
= ddf
->dlist
; d
; d
=d
->next
)
2432 if (d
->disk
.refnum
== vc
->conf
.phys_refnum
[i
])
2437 dev
= malloc(sizeof(*dev
));
2438 memset(dev
, 0, sizeof(*dev
));
2439 dev
->next
= this->devs
;
2442 dev
->disk
.number
= __be32_to_cpu(d
->disk
.refnum
);
2443 dev
->disk
.major
= d
->major
;
2444 dev
->disk
.minor
= d
->minor
;
2445 dev
->disk
.raid_disk
= i
;
2446 dev
->disk
.state
= (1<<MD_DISK_SYNC
)|(1<<MD_DISK_ACTIVE
);
2448 dev
->events
= __le32_to_cpu(ddf
->primary
.seq
);
2449 dev
->data_offset
= vc
->lba_offset
[i
];
2450 dev
->component_size
= __be64_to_cpu(vc
->conf
.blocks
);
2452 strcpy(dev
->name
, d
->devname
);
2458 static int init_zero_ddf(struct supertype
*st
,
2459 mdu_array_info_t
*info
,
2460 unsigned long long size
, char *name
,
2461 char *homehost
, int *uuid
)
2467 static int store_zero_ddf(struct supertype
*st
, int fd
)
2469 unsigned long long dsize
;
2471 memset(buf
, 0, 512);
2474 if (!get_dev_size(fd
, NULL
, &dsize
))
2477 lseek64(fd
, dsize
-512, 0);
2478 write(fd
, buf
, 512);
2482 static int compare_super_ddf(struct supertype
*st
, struct supertype
*tst
)
2486 * 0 same, or first was empty, and second was copied
2487 * 1 second had wrong number
2489 * 3 wrong other info
2491 struct ddf_super
*first
= st
->sb
;
2492 struct ddf_super
*second
= tst
->sb
;
2500 if (memcmp(first
->anchor
.guid
, second
->anchor
.guid
, DDF_GUID_LEN
) != 0)
2503 /* FIXME should I look at anything else? */
2508 * A new array 'a' has been started which claims to be instance 'inst'
2509 * within container 'c'.
2510 * We need to confirm that the array matches the metadata in 'c' so
2511 * that we don't corrupt any metadata.
2513 static int ddf_open_new(struct supertype
*c
, struct active_array
*a
, int inst
)
2515 fprintf(stderr
, "ddf: open_new %d\n", inst
);
2520 * The array 'a' is to be marked clean in the metadata.
2521 * If '->resync_start' is not ~(unsigned long long)0, then the array is only
2522 * clean up to the point (in sectors). If that cannot be recorded in the
2523 * metadata, then leave it as dirty.
2525 * For DDF, we need to clear the DDF_state_inconsistent bit in the
2526 * !global! virtual_disk.virtual_entry structure.
2528 static void ddf_set_array_state(struct active_array
*a
, int consistent
)
2530 struct ddf_super
*ddf
= a
->container
->sb
;
2531 int inst
= a
->info
.container_member
;
2533 ddf
->virt
->entries
[inst
].state
&= ~DDF_state_inconsistent
;
2535 ddf
->virt
->entries
[inst
].state
|= DDF_state_inconsistent
;
2536 ddf
->virt
->entries
[inst
].init_state
&= ~DDF_initstate_mask
;
2537 if (a
->resync_start
== ~0ULL)
2538 ddf
->virt
->entries
[inst
].init_state
|= DDF_init_full
;
2539 else if (a
->resync_start
== 0)
2540 ddf
->virt
->entries
[inst
].init_state
|= DDF_init_not
;
2542 ddf
->virt
->entries
[inst
].init_state
|= DDF_init_quick
;
2544 printf("ddf mark %s %llu\n", consistent
?"clean":"dirty",
2549 * The state of each disk is stored in the global phys_disk structure
2550 * in phys_disk.entries[n].state.
2551 * This makes various combinations awkward.
2552 * - When a device fails in any array, it must be failed in all arrays
2553 * that include a part of this device.
2554 * - When a component is rebuilding, we cannot include it officially in the
2555 * array unless this is the only array that uses the device.
2557 * So: when transitioning:
2558 * Online -> failed, just set failed flag. monitor will propagate
2559 * spare -> online, the device might need to be added to the array.
2560 * spare -> failed, just set failed. Don't worry if in array or not.
2562 static void ddf_set_disk(struct active_array
*a
, int n
, int state
)
2564 struct ddf_super
*ddf
= a
->container
->sb
;
2565 int inst
= a
->info
.container_member
;
2566 struct vd_config
*vc
= find_vdcr(ddf
, inst
);
2567 int pd
= find_phys(ddf
, vc
->phys_refnum
[n
]);
2571 fprintf(stderr
, "ddf: cannot find instance %d!!\n", inst
);
2575 /* disk doesn't currently exist. If it is now in_sync,
2577 if ((state
& DS_INSYNC
) && ! (state
& DS_FAULTY
)) {
2578 /* Find dev 'n' in a->info->devs, determine the
2579 * ddf refnum, and set vc->phys_refnum and update
2585 if (state
& DS_FAULTY
)
2586 ddf
->phys
->entries
[pd
].state
|= __cpu_to_be16(DDF_Failed
);
2587 if (state
& DS_INSYNC
) {
2588 ddf
->phys
->entries
[pd
].state
|= __cpu_to_be16(DDF_Online
);
2589 ddf
->phys
->entries
[pd
].state
&= __cpu_to_be16(~DDF_Rebuilding
);
2593 /* Now we need to check the state of the array and update
2594 * virtual_disk.entries[n].state.
2595 * It needs to be one of "optimal", "degraded", "failed".
2596 * I don't understand 'deleted' or 'missing'.
2599 for (i
=0; i
< a
->info
.array
.raid_disks
; i
++) {
2600 pd
= find_phys(ddf
, vc
->phys_refnum
[i
]);
2603 st
= ddf
->phys
->entries
[pd
].state
;
2604 if ((state
& (DDF_Online
|DDF_Failed
|DDF_Rebuilding
))
2608 state
= DDF_state_degraded
;
2609 if (working
== a
->info
.array
.raid_disks
)
2610 state
= DDF_state_optimal
;
2611 else switch(vc
->prl
) {
2615 state
= DDF_state_failed
;
2619 state
= DDF_state_failed
;
2623 if (working
< a
->info
.array
.raid_disks
-1)
2624 state
= DDF_state_failed
;
2627 if (working
< a
->info
.array
.raid_disks
-2)
2628 state
= DDF_state_failed
;
2629 else if (working
== a
->info
.array
.raid_disks
-1)
2630 state
= DDF_state_part_optimal
;
2634 ddf
->virt
->entries
[inst
].state
=
2635 (ddf
->virt
->entries
[inst
].state
& ~DDF_state_mask
)
2638 fprintf(stderr
, "ddf: set_disk %d\n", n
);
2641 static void ddf_sync_metadata(struct active_array
*a
)
2645 * Write all data to all devices.
2646 * Later, we might be able to track whether only local changes
2647 * have been made, or whether any global data has been changed,
2648 * but ddf is sufficiently weird that it probably always
2649 * changes global data ....
2651 __write_init_super_ddf(a
->container
, 0);
2652 fprintf(stderr
, "ddf: sync_metadata\n");
2655 struct superswitch super_ddf
= {
2657 .examine_super
= examine_super_ddf
,
2658 .brief_examine_super
= brief_examine_super_ddf
,
2659 .detail_super
= detail_super_ddf
,
2660 .brief_detail_super
= brief_detail_super_ddf
,
2661 .validate_geometry
= validate_geometry_ddf
,
2663 .match_home
= match_home_ddf
,
2664 .uuid_from_super
= uuid_from_super_ddf
,
2665 .getinfo_super
= getinfo_super_ddf
,
2666 .update_super
= update_super_ddf
,
2668 .avail_size
= avail_size_ddf
,
2670 .compare_super
= compare_super_ddf
,
2672 .load_super
= load_super_ddf
,
2673 .init_super
= init_zero_ddf
,
2674 .store_super
= store_zero_ddf
,
2675 .free_super
= free_super_ddf
,
2676 .match_metadata_desc
= match_metadata_desc_ddf
,
2677 .getinfo_super_n
= getinfo_super_n_container
,
2683 .text_version
= "ddf",
2686 .open_new
= ddf_open_new
,
2687 .set_array_state
= ddf_set_array_state
,
2688 .set_disk
= ddf_set_disk
,
2689 .sync_metadata
= ddf_sync_metadata
,
2694 /* Super_ddf_container is set by validate_geometry_ddf when given a
2695 * device that is not part of any array
2697 struct superswitch super_ddf_container
= {
2699 .validate_geometry
= validate_geometry_ddf_container
,
2700 .write_init_super
= write_init_super_ddf
,
2703 .load_super
= load_super_ddf
,
2704 .init_super
= init_super_ddf
,
2705 .add_to_super
= add_to_super_ddf
,
2706 .getinfo_super
= getinfo_super_ddf
,
2708 .free_super
= free_super_ddf
,
2710 .container_content
= container_content_ddf
,
2711 .getinfo_super_n
= getinfo_super_n_container
,
2716 .text_version
= "ddf",
2719 struct superswitch super_ddf_bvd
= {
2721 // .detail_super = detail_super_ddf_bvd,
2722 // .brief_detail_super = brief_detail_super_ddf_bvd,
2723 .validate_geometry
= validate_geometry_ddf_bvd
,
2724 .write_init_super
= write_init_super_ddf
,
2726 .update_super
= update_super_ddf
,
2727 .init_super
= init_super_ddf_bvd
,
2728 .add_to_super
= add_to_super_ddf_bvd
,
2729 .getinfo_super
= getinfo_super_ddf_bvd
,
2730 .getinfo_super_n
= getinfo_super_n_bvd
,
2732 .load_super
= load_super_ddf
,
2733 .free_super
= free_super_ddf
,
2734 .match_metadata_desc
= match_metadata_desc_ddf_bvd
,
2740 .text_version
= "ddf",
2743 struct superswitch super_ddf_svd
= {
2745 // .detail_super = detail_super_ddf_svd,
2746 // .brief_detail_super = brief_detail_super_ddf_svd,
2747 .validate_geometry
= validate_geometry_ddf_svd
,
2749 .update_super
= update_super_ddf
,
2750 .init_super
= init_super_ddf
,
2752 .load_super
= load_super_ddf
,
2753 .free_super
= free_super_ddf
,
2754 .match_metadata_desc
= match_metadata_desc_ddf_svd
,
2759 .text_version
= "ddf",