2 * ldm - Support for Windows Logical Disk Manager (Dynamic Disks)
4 * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
5 * Copyright (c) 2001-2007 Anton Altaparmakov
6 * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
8 * Documentation is available at http://www.linux-ntfs.org/content/view/19/37/
10 * This program is free software; you can redistribute it and/or modify it under
11 * the terms of the GNU General Public License as published by the Free Software
12 * Foundation; either version 2 of the License, or (at your option) any later
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License along with
21 * this program (in the main directory of the source in the file COPYING); if
22 * not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
23 * Boston, MA 02111-1307 USA
26 #include <linux/slab.h>
27 #include <linux/pagemap.h>
28 #include <linux/stringify.h>
34 * ldm_debug/info/error/crit - Output an error message
35 * @f: A printf format string containing the message
36 * @...: Variables to substitute into @f
38 * ldm_debug() writes a DEBUG level message to the syslog but only if the
39 * driver was compiled with debug enabled. Otherwise, the call turns into a NOP.
41 #ifndef CONFIG_LDM_DEBUG
42 #define ldm_debug(...) do {} while (0)
44 #define ldm_debug(f, a...) _ldm_printk (KERN_DEBUG, __FUNCTION__, f, ##a)
47 #define ldm_crit(f, a...) _ldm_printk (KERN_CRIT, __FUNCTION__, f, ##a)
48 #define ldm_error(f, a...) _ldm_printk (KERN_ERR, __FUNCTION__, f, ##a)
49 #define ldm_info(f, a...) _ldm_printk (KERN_INFO, __FUNCTION__, f, ##a)
51 __attribute__ ((format (printf
, 3, 4)))
52 static void _ldm_printk (const char *level
, const char *function
,
59 vsnprintf (buf
, sizeof (buf
), fmt
, args
);
62 printk ("%s%s(): %s\n", level
, function
, buf
);
66 * ldm_parse_hexbyte - Convert a ASCII hex number to a byte
67 * @src: Pointer to at least 2 characters to convert.
69 * Convert a two character ASCII hex string to a number.
71 * Return: 0-255 Success, the byte was parsed correctly
72 * -1 Error, an invalid character was supplied
74 static int ldm_parse_hexbyte (const u8
*src
)
76 unsigned int x
; /* For correct wrapping */
80 if ((x
= src
[0] - '0') <= '9'-'0') h
= x
;
81 else if ((x
= src
[0] - 'a') <= 'f'-'a') h
= x
+10;
82 else if ((x
= src
[0] - 'A') <= 'F'-'A') h
= x
+10;
87 if ((x
= src
[1] - '0') <= '9'-'0') return h
| x
;
88 if ((x
= src
[1] - 'a') <= 'f'-'a') return h
| (x
+10);
89 if ((x
= src
[1] - 'A') <= 'F'-'A') return h
| (x
+10);
94 * ldm_parse_guid - Convert GUID from ASCII to binary
95 * @src: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
96 * @dest: Memory block to hold binary GUID (16 bytes)
98 * N.B. The GUID need not be NULL terminated.
100 * Return: 'true' @dest contains binary GUID
101 * 'false' @dest contents are undefined
103 static bool ldm_parse_guid (const u8
*src
, u8
*dest
)
105 static const int size
[] = { 4, 2, 2, 2, 6 };
108 if (src
[8] != '-' || src
[13] != '-' ||
109 src
[18] != '-' || src
[23] != '-')
112 for (j
= 0; j
< 5; j
++, src
++)
113 for (i
= 0; i
< size
[j
]; i
++, src
+=2, *dest
++ = v
)
114 if ((v
= ldm_parse_hexbyte (src
)) < 0)
121 * ldm_parse_privhead - Read the LDM Database PRIVHEAD structure
122 * @data: Raw database PRIVHEAD structure loaded from the device
123 * @ph: In-memory privhead structure in which to return parsed information
125 * This parses the LDM database PRIVHEAD structure supplied in @data and
126 * sets up the in-memory privhead structure @ph with the obtained information.
128 * Return: 'true' @ph contains the PRIVHEAD data
129 * 'false' @ph contents are undefined
131 static bool ldm_parse_privhead(const u8
*data
, struct privhead
*ph
)
133 bool is_vista
= false;
135 BUG_ON(!data
|| !ph
);
136 if (MAGIC_PRIVHEAD
!= BE64(data
)) {
137 ldm_error("Cannot find PRIVHEAD structure. LDM database is"
138 " corrupt. Aborting.");
141 ph
->ver_major
= BE16(data
+ 0x000C);
142 ph
->ver_minor
= BE16(data
+ 0x000E);
143 ph
->logical_disk_start
= BE64(data
+ 0x011B);
144 ph
->logical_disk_size
= BE64(data
+ 0x0123);
145 ph
->config_start
= BE64(data
+ 0x012B);
146 ph
->config_size
= BE64(data
+ 0x0133);
147 /* Version 2.11 is Win2k/XP and version 2.12 is Vista. */
148 if (ph
->ver_major
== 2 && ph
->ver_minor
== 12)
150 if (!is_vista
&& (ph
->ver_major
!= 2 || ph
->ver_minor
!= 11)) {
151 ldm_error("Expected PRIVHEAD version 2.11 or 2.12, got %d.%d."
152 " Aborting.", ph
->ver_major
, ph
->ver_minor
);
155 ldm_debug("PRIVHEAD version %d.%d (Windows %s).", ph
->ver_major
,
156 ph
->ver_minor
, is_vista
? "Vista" : "2000/XP");
157 if (ph
->config_size
!= LDM_DB_SIZE
) { /* 1 MiB in sectors. */
158 /* Warn the user and continue, carefully. */
159 ldm_info("Database is normally %u bytes, it claims to "
160 "be %llu bytes.", LDM_DB_SIZE
,
161 (unsigned long long)ph
->config_size
);
163 if ((ph
->logical_disk_size
== 0) || (ph
->logical_disk_start
+
164 ph
->logical_disk_size
> ph
->config_start
)) {
165 ldm_error("PRIVHEAD disk size doesn't match real disk size");
168 if (!ldm_parse_guid(data
+ 0x0030, ph
->disk_id
)) {
169 ldm_error("PRIVHEAD contains an invalid GUID.");
172 ldm_debug("Parsed PRIVHEAD successfully.");
177 * ldm_parse_tocblock - Read the LDM Database TOCBLOCK structure
178 * @data: Raw database TOCBLOCK structure loaded from the device
179 * @toc: In-memory toc structure in which to return parsed information
181 * This parses the LDM Database TOCBLOCK (table of contents) structure supplied
182 * in @data and sets up the in-memory tocblock structure @toc with the obtained
185 * N.B. The *_start and *_size values returned in @toc are not range-checked.
187 * Return: 'true' @toc contains the TOCBLOCK data
188 * 'false' @toc contents are undefined
190 static bool ldm_parse_tocblock (const u8
*data
, struct tocblock
*toc
)
192 BUG_ON (!data
|| !toc
);
194 if (MAGIC_TOCBLOCK
!= BE64 (data
)) {
195 ldm_crit ("Cannot find TOCBLOCK, database may be corrupt.");
198 strncpy (toc
->bitmap1_name
, data
+ 0x24, sizeof (toc
->bitmap1_name
));
199 toc
->bitmap1_name
[sizeof (toc
->bitmap1_name
) - 1] = 0;
200 toc
->bitmap1_start
= BE64 (data
+ 0x2E);
201 toc
->bitmap1_size
= BE64 (data
+ 0x36);
203 if (strncmp (toc
->bitmap1_name
, TOC_BITMAP1
,
204 sizeof (toc
->bitmap1_name
)) != 0) {
205 ldm_crit ("TOCBLOCK's first bitmap is '%s', should be '%s'.",
206 TOC_BITMAP1
, toc
->bitmap1_name
);
209 strncpy (toc
->bitmap2_name
, data
+ 0x46, sizeof (toc
->bitmap2_name
));
210 toc
->bitmap2_name
[sizeof (toc
->bitmap2_name
) - 1] = 0;
211 toc
->bitmap2_start
= BE64 (data
+ 0x50);
212 toc
->bitmap2_size
= BE64 (data
+ 0x58);
213 if (strncmp (toc
->bitmap2_name
, TOC_BITMAP2
,
214 sizeof (toc
->bitmap2_name
)) != 0) {
215 ldm_crit ("TOCBLOCK's second bitmap is '%s', should be '%s'.",
216 TOC_BITMAP2
, toc
->bitmap2_name
);
219 ldm_debug ("Parsed TOCBLOCK successfully.");
224 * ldm_parse_vmdb - Read the LDM Database VMDB structure
225 * @data: Raw database VMDB structure loaded from the device
226 * @vm: In-memory vmdb structure in which to return parsed information
228 * This parses the LDM Database VMDB structure supplied in @data and sets up
229 * the in-memory vmdb structure @vm with the obtained information.
231 * N.B. The *_start, *_size and *_seq values will be range-checked later.
233 * Return: 'true' @vm contains VMDB info
234 * 'false' @vm contents are undefined
236 static bool ldm_parse_vmdb (const u8
*data
, struct vmdb
*vm
)
238 BUG_ON (!data
|| !vm
);
240 if (MAGIC_VMDB
!= BE32 (data
)) {
241 ldm_crit ("Cannot find the VMDB, database may be corrupt.");
245 vm
->ver_major
= BE16 (data
+ 0x12);
246 vm
->ver_minor
= BE16 (data
+ 0x14);
247 if ((vm
->ver_major
!= 4) || (vm
->ver_minor
!= 10)) {
248 ldm_error ("Expected VMDB version %d.%d, got %d.%d. "
249 "Aborting.", 4, 10, vm
->ver_major
, vm
->ver_minor
);
253 vm
->vblk_size
= BE32 (data
+ 0x08);
254 vm
->vblk_offset
= BE32 (data
+ 0x0C);
255 vm
->last_vblk_seq
= BE32 (data
+ 0x04);
257 ldm_debug ("Parsed VMDB successfully.");
262 * ldm_compare_privheads - Compare two privhead objects
263 * @ph1: First privhead
264 * @ph2: Second privhead
266 * This compares the two privhead structures @ph1 and @ph2.
268 * Return: 'true' Identical
271 static bool ldm_compare_privheads (const struct privhead
*ph1
,
272 const struct privhead
*ph2
)
274 BUG_ON (!ph1
|| !ph2
);
276 return ((ph1
->ver_major
== ph2
->ver_major
) &&
277 (ph1
->ver_minor
== ph2
->ver_minor
) &&
278 (ph1
->logical_disk_start
== ph2
->logical_disk_start
) &&
279 (ph1
->logical_disk_size
== ph2
->logical_disk_size
) &&
280 (ph1
->config_start
== ph2
->config_start
) &&
281 (ph1
->config_size
== ph2
->config_size
) &&
282 !memcmp (ph1
->disk_id
, ph2
->disk_id
, GUID_SIZE
));
286 * ldm_compare_tocblocks - Compare two tocblock objects
290 * This compares the two tocblock structures @toc1 and @toc2.
292 * Return: 'true' Identical
295 static bool ldm_compare_tocblocks (const struct tocblock
*toc1
,
296 const struct tocblock
*toc2
)
298 BUG_ON (!toc1
|| !toc2
);
300 return ((toc1
->bitmap1_start
== toc2
->bitmap1_start
) &&
301 (toc1
->bitmap1_size
== toc2
->bitmap1_size
) &&
302 (toc1
->bitmap2_start
== toc2
->bitmap2_start
) &&
303 (toc1
->bitmap2_size
== toc2
->bitmap2_size
) &&
304 !strncmp (toc1
->bitmap1_name
, toc2
->bitmap1_name
,
305 sizeof (toc1
->bitmap1_name
)) &&
306 !strncmp (toc1
->bitmap2_name
, toc2
->bitmap2_name
,
307 sizeof (toc1
->bitmap2_name
)));
311 * ldm_validate_privheads - Compare the primary privhead with its backups
312 * @bdev: Device holding the LDM Database
313 * @ph1: Memory struct to fill with ph contents
315 * Read and compare all three privheads from disk.
317 * The privheads on disk show the size and location of the main disk area and
318 * the configuration area (the database). The values are range-checked against
319 * @hd, which contains the real size of the disk.
321 * Return: 'true' Success
324 static bool ldm_validate_privheads (struct block_device
*bdev
,
325 struct privhead
*ph1
)
327 static const int off
[3] = { OFF_PRIV1
, OFF_PRIV2
, OFF_PRIV3
};
328 struct privhead
*ph
[3] = { ph1
};
335 BUG_ON (!bdev
|| !ph1
);
337 ph
[1] = kmalloc (sizeof (*ph
[1]), GFP_KERNEL
);
338 ph
[2] = kmalloc (sizeof (*ph
[2]), GFP_KERNEL
);
339 if (!ph
[1] || !ph
[2]) {
340 ldm_crit ("Out of memory.");
344 /* off[1 & 2] are relative to ph[0]->config_start */
345 ph
[0]->config_start
= 0;
347 /* Read and parse privheads */
348 for (i
= 0; i
< 3; i
++) {
349 data
= read_dev_sector (bdev
,
350 ph
[0]->config_start
+ off
[i
], §
);
352 ldm_crit ("Disk read failed.");
355 result
= ldm_parse_privhead (data
, ph
[i
]);
356 put_dev_sector (sect
);
358 ldm_error ("Cannot find PRIVHEAD %d.", i
+1); /* Log again */
360 goto out
; /* Already logged */
362 break; /* FIXME ignore for now, 3rd PH can fail on odd-sized disks */
366 num_sects
= bdev
->bd_inode
->i_size
>> 9;
368 if ((ph
[0]->config_start
> num_sects
) ||
369 ((ph
[0]->config_start
+ ph
[0]->config_size
) > num_sects
)) {
370 ldm_crit ("Database extends beyond the end of the disk.");
374 if ((ph
[0]->logical_disk_start
> ph
[0]->config_start
) ||
375 ((ph
[0]->logical_disk_start
+ ph
[0]->logical_disk_size
)
376 > ph
[0]->config_start
)) {
377 ldm_crit ("Disk and database overlap.");
381 if (!ldm_compare_privheads (ph
[0], ph
[1])) {
382 ldm_crit ("Primary and backup PRIVHEADs don't match.");
385 /* FIXME ignore this for now
386 if (!ldm_compare_privheads (ph[0], ph[2])) {
387 ldm_crit ("Primary and backup PRIVHEADs don't match.");
390 ldm_debug ("Validated PRIVHEADs successfully.");
399 * ldm_validate_tocblocks - Validate the table of contents and its backups
400 * @bdev: Device holding the LDM Database
401 * @base: Offset, into @bdev, of the database
402 * @ldb: Cache of the database structures
404 * Find and compare the four tables of contents of the LDM Database stored on
405 * @bdev and return the parsed information into @toc1.
407 * The offsets and sizes of the configs are range-checked against a privhead.
409 * Return: 'true' @toc1 contains validated TOCBLOCK info
410 * 'false' @toc1 contents are undefined
412 static bool ldm_validate_tocblocks(struct block_device
*bdev
,
413 unsigned long base
, struct ldmdb
*ldb
)
415 static const int off
[4] = { OFF_TOCB1
, OFF_TOCB2
, OFF_TOCB3
, OFF_TOCB4
};
416 struct tocblock
*tb
[4];
423 BUG_ON(!bdev
|| !ldb
);
426 tb
[1] = kmalloc(sizeof(*tb
[1]) * 3, GFP_KERNEL
);
428 ldm_crit("Out of memory.");
431 tb
[2] = (struct tocblock
*)((u8
*)tb
[1] + sizeof(*tb
[1]));
432 tb
[3] = (struct tocblock
*)((u8
*)tb
[2] + sizeof(*tb
[2]));
434 * Try to read and parse all four TOCBLOCKs.
436 * Windows Vista LDM v2.12 does not always have all four TOCBLOCKs so
437 * skip any that fail as long as we get at least one valid TOCBLOCK.
439 for (nr_tbs
= i
= 0; i
< 4; i
++) {
440 data
= read_dev_sector(bdev
, base
+ off
[i
], §
);
442 ldm_error("Disk read failed for TOCBLOCK %d.", i
);
445 if (ldm_parse_tocblock(data
, tb
[nr_tbs
]))
447 put_dev_sector(sect
);
450 ldm_crit("Failed to find a valid TOCBLOCK.");
453 /* Range check the TOCBLOCK against a privhead. */
454 if (((tb
[0]->bitmap1_start
+ tb
[0]->bitmap1_size
) > ph
->config_size
) ||
455 ((tb
[0]->bitmap2_start
+ tb
[0]->bitmap2_size
) >
457 ldm_crit("The bitmaps are out of range. Giving up.");
460 /* Compare all loaded TOCBLOCKs. */
461 for (i
= 1; i
< nr_tbs
; i
++) {
462 if (!ldm_compare_tocblocks(tb
[0], tb
[i
])) {
463 ldm_crit("TOCBLOCKs 0 and %d do not match.", i
);
467 ldm_debug("Validated %d TOCBLOCKs successfully.", nr_tbs
);
475 * ldm_validate_vmdb - Read the VMDB and validate it
476 * @bdev: Device holding the LDM Database
477 * @base: Offset, into @bdev, of the database
478 * @ldb: Cache of the database structures
480 * Find the vmdb of the LDM Database stored on @bdev and return the parsed
481 * information in @ldb.
483 * Return: 'true' @ldb contains validated VBDB info
484 * 'false' @ldb contents are undefined
486 static bool ldm_validate_vmdb (struct block_device
*bdev
, unsigned long base
,
493 struct tocblock
*toc
;
495 BUG_ON (!bdev
|| !ldb
);
500 data
= read_dev_sector (bdev
, base
+ OFF_VMDB
, §
);
502 ldm_crit ("Disk read failed.");
506 if (!ldm_parse_vmdb (data
, vm
))
507 goto out
; /* Already logged */
509 /* Are there uncommitted transactions? */
510 if (BE16(data
+ 0x10) != 0x01) {
511 ldm_crit ("Database is not in a consistent state. Aborting.");
515 if (vm
->vblk_offset
!= 512)
516 ldm_info ("VBLKs start at offset 0x%04x.", vm
->vblk_offset
);
519 * The last_vblkd_seq can be before the end of the vmdb, just make sure
520 * it is not out of bounds.
522 if ((vm
->vblk_size
* vm
->last_vblk_seq
) > (toc
->bitmap1_size
<< 9)) {
523 ldm_crit ("VMDB exceeds allowed size specified by TOCBLOCK. "
524 "Database is corrupt. Aborting.");
530 put_dev_sector (sect
);
536 * ldm_validate_partition_table - Determine whether bdev might be a dynamic disk
537 * @bdev: Device holding the LDM Database
539 * This function provides a weak test to decide whether the device is a dynamic
540 * disk or not. It looks for an MS-DOS-style partition table containing at
541 * least one partition of type 0x42 (formerly SFS, now used by Windows for
544 * N.B. The only possible error can come from the read_dev_sector and that is
545 * only likely to happen if the underlying device is strange. If that IS
546 * the case we should return zero to let someone else try.
548 * Return: 'true' @bdev is a dynamic disk
549 * 'false' @bdev is not a dynamic disk, or an error occurred
551 static bool ldm_validate_partition_table (struct block_device
*bdev
)
561 data
= read_dev_sector (bdev
, 0, §
);
563 ldm_crit ("Disk read failed.");
567 if (*(__le16
*) (data
+ 0x01FE) != cpu_to_le16 (MSDOS_LABEL_MAGIC
))
570 p
= (struct partition
*)(data
+ 0x01BE);
571 for (i
= 0; i
< 4; i
++, p
++)
572 if (SYS_IND (p
) == LDM_PARTITION
) {
578 ldm_debug ("Found W2K dynamic disk partition type.");
581 put_dev_sector (sect
);
586 * ldm_get_disk_objid - Search a linked list of vblk's for a given Disk Id
587 * @ldb: Cache of the database structures
589 * The LDM Database contains a list of all partitions on all dynamic disks.
590 * The primary PRIVHEAD, at the beginning of the physical disk, tells us
591 * the GUID of this disk. This function searches for the GUID in a linked
594 * Return: Pointer, A matching vblk was found
595 * NULL, No match, or an error
597 static struct vblk
* ldm_get_disk_objid (const struct ldmdb
*ldb
)
599 struct list_head
*item
;
603 list_for_each (item
, &ldb
->v_disk
) {
604 struct vblk
*v
= list_entry (item
, struct vblk
, list
);
605 if (!memcmp (v
->vblk
.disk
.disk_id
, ldb
->ph
.disk_id
, GUID_SIZE
))
613 * ldm_create_data_partitions - Create data partitions for this device
614 * @pp: List of the partitions parsed so far
615 * @ldb: Cache of the database structures
617 * The database contains ALL the partitions for ALL disk groups, so we need to
618 * filter out this specific disk. Using the disk's object id, we can find all
619 * the partitions in the database that belong to this disk.
621 * Add each partition in our database, to the parsed_partitions structure.
623 * N.B. This function creates the partitions in the order it finds partition
624 * objects in the linked list.
626 * Return: 'true' Partition created
627 * 'false' Error, probably a range checking problem
629 static bool ldm_create_data_partitions (struct parsed_partitions
*pp
,
630 const struct ldmdb
*ldb
)
632 struct list_head
*item
;
635 struct vblk_part
*part
;
638 BUG_ON (!pp
|| !ldb
);
640 disk
= ldm_get_disk_objid (ldb
);
642 ldm_crit ("Can't find the ID of this disk in the database.");
648 /* Create the data partitions */
649 list_for_each (item
, &ldb
->v_part
) {
650 vb
= list_entry (item
, struct vblk
, list
);
651 part
= &vb
->vblk
.part
;
653 if (part
->disk_id
!= disk
->obj_id
)
656 put_partition (pp
, part_num
, ldb
->ph
.logical_disk_start
+
657 part
->start
, part
->size
);
667 * ldm_relative - Calculate the next relative offset
668 * @buffer: Block of data being worked on
669 * @buflen: Size of the block of data
670 * @base: Size of the previous fixed width fields
671 * @offset: Cumulative size of the previous variable-width fields
673 * Because many of the VBLK fields are variable-width, it's necessary
674 * to calculate each offset based on the previous one and the length
675 * of the field it pointed to.
677 * Return: -1 Error, the calculated offset exceeded the size of the buffer
678 * n OK, a range-checked offset into buffer
680 static int ldm_relative(const u8
*buffer
, int buflen
, int base
, int offset
)
684 if (!buffer
|| offset
< 0 || base
> buflen
) {
686 ldm_error("!buffer");
688 ldm_error("offset (%d) < 0", offset
);
690 ldm_error("base (%d) > buflen (%d)", base
, buflen
);
693 if (base
+ buffer
[base
] >= buflen
) {
694 ldm_error("base (%d) + buffer[base] (%d) >= buflen (%d)", base
,
695 buffer
[base
], buflen
);
698 return buffer
[base
] + offset
+ 1;
702 * ldm_get_vnum - Convert a variable-width, big endian number, into cpu order
703 * @block: Pointer to the variable-width number to convert
705 * Large numbers in the LDM Database are often stored in a packed format. Each
706 * number is prefixed by a one byte width marker. All numbers in the database
707 * are stored in big-endian byte order. This function reads one of these
708 * numbers and returns the result
710 * N.B. This function DOES NOT perform any range checking, though the most
711 * it will read is eight bytes.
714 * 0 Zero, or an error occurred
716 static u64
ldm_get_vnum (const u8
*block
)
725 if (length
&& length
<= 8)
727 tmp
= (tmp
<< 8) | *block
++;
729 ldm_error ("Illegal length %d.", length
);
735 * ldm_get_vstr - Read a length-prefixed string into a buffer
736 * @block: Pointer to the length marker
737 * @buffer: Location to copy string to
738 * @buflen: Size of the output buffer
740 * Many of the strings in the LDM Database are not NULL terminated. Instead
741 * they are prefixed by a one byte length marker. This function copies one of
742 * these strings into a buffer.
744 * N.B. This function DOES NOT perform any range checking on the input.
745 * If the buffer is too small, the output will be truncated.
747 * Return: 0, Error and @buffer contents are undefined
748 * n, String length in characters (excluding NULL)
749 * buflen-1, String was truncated.
751 static int ldm_get_vstr (const u8
*block
, u8
*buffer
, int buflen
)
755 BUG_ON (!block
|| !buffer
);
758 if (length
>= buflen
) {
759 ldm_error ("Truncating string %d -> %d.", length
, buflen
);
762 memcpy (buffer
, block
+ 1, length
);
769 * ldm_parse_cmp3 - Read a raw VBLK Component object into a vblk structure
770 * @buffer: Block of data being worked on
771 * @buflen: Size of the block of data
772 * @vb: In-memory vblk in which to return information
774 * Read a raw VBLK Component object (version 3) into a vblk structure.
776 * Return: 'true' @vb contains a Component VBLK
777 * 'false' @vb contents are not defined
779 static bool ldm_parse_cmp3 (const u8
*buffer
, int buflen
, struct vblk
*vb
)
781 int r_objid
, r_name
, r_vstate
, r_child
, r_parent
, r_stripe
, r_cols
, len
;
782 struct vblk_comp
*comp
;
784 BUG_ON (!buffer
|| !vb
);
786 r_objid
= ldm_relative (buffer
, buflen
, 0x18, 0);
787 r_name
= ldm_relative (buffer
, buflen
, 0x18, r_objid
);
788 r_vstate
= ldm_relative (buffer
, buflen
, 0x18, r_name
);
789 r_child
= ldm_relative (buffer
, buflen
, 0x1D, r_vstate
);
790 r_parent
= ldm_relative (buffer
, buflen
, 0x2D, r_child
);
792 if (buffer
[0x12] & VBLK_FLAG_COMP_STRIPE
) {
793 r_stripe
= ldm_relative (buffer
, buflen
, 0x2E, r_parent
);
794 r_cols
= ldm_relative (buffer
, buflen
, 0x2E, r_stripe
);
804 len
+= VBLK_SIZE_CMP3
;
805 if (len
!= BE32 (buffer
+ 0x14))
808 comp
= &vb
->vblk
.comp
;
809 ldm_get_vstr (buffer
+ 0x18 + r_name
, comp
->state
,
810 sizeof (comp
->state
));
811 comp
->type
= buffer
[0x18 + r_vstate
];
812 comp
->children
= ldm_get_vnum (buffer
+ 0x1D + r_vstate
);
813 comp
->parent_id
= ldm_get_vnum (buffer
+ 0x2D + r_child
);
814 comp
->chunksize
= r_stripe
? ldm_get_vnum (buffer
+r_parent
+0x2E) : 0;
820 * ldm_parse_dgr3 - Read a raw VBLK Disk Group object into a vblk structure
821 * @buffer: Block of data being worked on
822 * @buflen: Size of the block of data
823 * @vb: In-memory vblk in which to return information
825 * Read a raw VBLK Disk Group object (version 3) into a vblk structure.
827 * Return: 'true' @vb contains a Disk Group VBLK
828 * 'false' @vb contents are not defined
830 static int ldm_parse_dgr3 (const u8
*buffer
, int buflen
, struct vblk
*vb
)
832 int r_objid
, r_name
, r_diskid
, r_id1
, r_id2
, len
;
833 struct vblk_dgrp
*dgrp
;
835 BUG_ON (!buffer
|| !vb
);
837 r_objid
= ldm_relative (buffer
, buflen
, 0x18, 0);
838 r_name
= ldm_relative (buffer
, buflen
, 0x18, r_objid
);
839 r_diskid
= ldm_relative (buffer
, buflen
, 0x18, r_name
);
841 if (buffer
[0x12] & VBLK_FLAG_DGR3_IDS
) {
842 r_id1
= ldm_relative (buffer
, buflen
, 0x24, r_diskid
);
843 r_id2
= ldm_relative (buffer
, buflen
, 0x24, r_id1
);
853 len
+= VBLK_SIZE_DGR3
;
854 if (len
!= BE32 (buffer
+ 0x14))
857 dgrp
= &vb
->vblk
.dgrp
;
858 ldm_get_vstr (buffer
+ 0x18 + r_name
, dgrp
->disk_id
,
859 sizeof (dgrp
->disk_id
));
864 * ldm_parse_dgr4 - Read a raw VBLK Disk Group object into a vblk structure
865 * @buffer: Block of data being worked on
866 * @buflen: Size of the block of data
867 * @vb: In-memory vblk in which to return information
869 * Read a raw VBLK Disk Group object (version 4) into a vblk structure.
871 * Return: 'true' @vb contains a Disk Group VBLK
872 * 'false' @vb contents are not defined
874 static bool ldm_parse_dgr4 (const u8
*buffer
, int buflen
, struct vblk
*vb
)
877 int r_objid
, r_name
, r_id1
, r_id2
, len
;
878 struct vblk_dgrp
*dgrp
;
880 BUG_ON (!buffer
|| !vb
);
882 r_objid
= ldm_relative (buffer
, buflen
, 0x18, 0);
883 r_name
= ldm_relative (buffer
, buflen
, 0x18, r_objid
);
885 if (buffer
[0x12] & VBLK_FLAG_DGR4_IDS
) {
886 r_id1
= ldm_relative (buffer
, buflen
, 0x44, r_name
);
887 r_id2
= ldm_relative (buffer
, buflen
, 0x44, r_id1
);
897 len
+= VBLK_SIZE_DGR4
;
898 if (len
!= BE32 (buffer
+ 0x14))
901 dgrp
= &vb
->vblk
.dgrp
;
903 ldm_get_vstr (buffer
+ 0x18 + r_objid
, buf
, sizeof (buf
));
908 * ldm_parse_dsk3 - Read a raw VBLK Disk object into a vblk structure
909 * @buffer: Block of data being worked on
910 * @buflen: Size of the block of data
911 * @vb: In-memory vblk in which to return information
913 * Read a raw VBLK Disk object (version 3) into a vblk structure.
915 * Return: 'true' @vb contains a Disk VBLK
916 * 'false' @vb contents are not defined
918 static bool ldm_parse_dsk3 (const u8
*buffer
, int buflen
, struct vblk
*vb
)
920 int r_objid
, r_name
, r_diskid
, r_altname
, len
;
921 struct vblk_disk
*disk
;
923 BUG_ON (!buffer
|| !vb
);
925 r_objid
= ldm_relative (buffer
, buflen
, 0x18, 0);
926 r_name
= ldm_relative (buffer
, buflen
, 0x18, r_objid
);
927 r_diskid
= ldm_relative (buffer
, buflen
, 0x18, r_name
);
928 r_altname
= ldm_relative (buffer
, buflen
, 0x18, r_diskid
);
933 len
+= VBLK_SIZE_DSK3
;
934 if (len
!= BE32 (buffer
+ 0x14))
937 disk
= &vb
->vblk
.disk
;
938 ldm_get_vstr (buffer
+ 0x18 + r_diskid
, disk
->alt_name
,
939 sizeof (disk
->alt_name
));
940 if (!ldm_parse_guid (buffer
+ 0x19 + r_name
, disk
->disk_id
))
947 * ldm_parse_dsk4 - Read a raw VBLK Disk object into a vblk structure
948 * @buffer: Block of data being worked on
949 * @buflen: Size of the block of data
950 * @vb: In-memory vblk in which to return information
952 * Read a raw VBLK Disk object (version 4) into a vblk structure.
954 * Return: 'true' @vb contains a Disk VBLK
955 * 'false' @vb contents are not defined
957 static bool ldm_parse_dsk4 (const u8
*buffer
, int buflen
, struct vblk
*vb
)
959 int r_objid
, r_name
, len
;
960 struct vblk_disk
*disk
;
962 BUG_ON (!buffer
|| !vb
);
964 r_objid
= ldm_relative (buffer
, buflen
, 0x18, 0);
965 r_name
= ldm_relative (buffer
, buflen
, 0x18, r_objid
);
970 len
+= VBLK_SIZE_DSK4
;
971 if (len
!= BE32 (buffer
+ 0x14))
974 disk
= &vb
->vblk
.disk
;
975 memcpy (disk
->disk_id
, buffer
+ 0x18 + r_name
, GUID_SIZE
);
980 * ldm_parse_prt3 - Read a raw VBLK Partition object into a vblk structure
981 * @buffer: Block of data being worked on
982 * @buflen: Size of the block of data
983 * @vb: In-memory vblk in which to return information
985 * Read a raw VBLK Partition object (version 3) into a vblk structure.
987 * Return: 'true' @vb contains a Partition VBLK
988 * 'false' @vb contents are not defined
990 static bool ldm_parse_prt3(const u8
*buffer
, int buflen
, struct vblk
*vb
)
992 int r_objid
, r_name
, r_size
, r_parent
, r_diskid
, r_index
, len
;
993 struct vblk_part
*part
;
995 BUG_ON(!buffer
|| !vb
);
996 r_objid
= ldm_relative(buffer
, buflen
, 0x18, 0);
998 ldm_error("r_objid %d < 0", r_objid
);
1001 r_name
= ldm_relative(buffer
, buflen
, 0x18, r_objid
);
1003 ldm_error("r_name %d < 0", r_name
);
1006 r_size
= ldm_relative(buffer
, buflen
, 0x34, r_name
);
1008 ldm_error("r_size %d < 0", r_size
);
1011 r_parent
= ldm_relative(buffer
, buflen
, 0x34, r_size
);
1013 ldm_error("r_parent %d < 0", r_parent
);
1016 r_diskid
= ldm_relative(buffer
, buflen
, 0x34, r_parent
);
1018 ldm_error("r_diskid %d < 0", r_diskid
);
1021 if (buffer
[0x12] & VBLK_FLAG_PART_INDEX
) {
1022 r_index
= ldm_relative(buffer
, buflen
, 0x34, r_diskid
);
1024 ldm_error("r_index %d < 0", r_index
);
1033 ldm_error("len %d < 0", len
);
1036 len
+= VBLK_SIZE_PRT3
;
1037 if (len
> BE32(buffer
+ 0x14)) {
1038 ldm_error("len %d > BE32(buffer + 0x14) %d", len
,
1039 BE32(buffer
+ 0x14));
1042 part
= &vb
->vblk
.part
;
1043 part
->start
= BE64(buffer
+ 0x24 + r_name
);
1044 part
->volume_offset
= BE64(buffer
+ 0x2C + r_name
);
1045 part
->size
= ldm_get_vnum(buffer
+ 0x34 + r_name
);
1046 part
->parent_id
= ldm_get_vnum(buffer
+ 0x34 + r_size
);
1047 part
->disk_id
= ldm_get_vnum(buffer
+ 0x34 + r_parent
);
1048 if (vb
->flags
& VBLK_FLAG_PART_INDEX
)
1049 part
->partnum
= buffer
[0x35 + r_diskid
];
1056 * ldm_parse_vol5 - Read a raw VBLK Volume object into a vblk structure
1057 * @buffer: Block of data being worked on
1058 * @buflen: Size of the block of data
1059 * @vb: In-memory vblk in which to return information
1061 * Read a raw VBLK Volume object (version 5) into a vblk structure.
1063 * Return: 'true' @vb contains a Volume VBLK
1064 * 'false' @vb contents are not defined
1066 static bool ldm_parse_vol5(const u8
*buffer
, int buflen
, struct vblk
*vb
)
1068 int r_objid
, r_name
, r_vtype
, r_disable_drive_letter
, r_child
, r_size
;
1069 int r_id1
, r_id2
, r_size2
, r_drive
, len
;
1070 struct vblk_volu
*volu
;
1072 BUG_ON(!buffer
|| !vb
);
1073 r_objid
= ldm_relative(buffer
, buflen
, 0x18, 0);
1075 ldm_error("r_objid %d < 0", r_objid
);
1078 r_name
= ldm_relative(buffer
, buflen
, 0x18, r_objid
);
1080 ldm_error("r_name %d < 0", r_name
);
1083 r_vtype
= ldm_relative(buffer
, buflen
, 0x18, r_name
);
1085 ldm_error("r_vtype %d < 0", r_vtype
);
1088 r_disable_drive_letter
= ldm_relative(buffer
, buflen
, 0x18, r_vtype
);
1089 if (r_disable_drive_letter
< 0) {
1090 ldm_error("r_disable_drive_letter %d < 0",
1091 r_disable_drive_letter
);
1094 r_child
= ldm_relative(buffer
, buflen
, 0x2D, r_disable_drive_letter
);
1096 ldm_error("r_child %d < 0", r_child
);
1099 r_size
= ldm_relative(buffer
, buflen
, 0x3D, r_child
);
1101 ldm_error("r_size %d < 0", r_size
);
1104 if (buffer
[0x12] & VBLK_FLAG_VOLU_ID1
) {
1105 r_id1
= ldm_relative(buffer
, buflen
, 0x52, r_size
);
1107 ldm_error("r_id1 %d < 0", r_id1
);
1112 if (buffer
[0x12] & VBLK_FLAG_VOLU_ID2
) {
1113 r_id2
= ldm_relative(buffer
, buflen
, 0x52, r_id1
);
1115 ldm_error("r_id2 %d < 0", r_id2
);
1120 if (buffer
[0x12] & VBLK_FLAG_VOLU_SIZE
) {
1121 r_size2
= ldm_relative(buffer
, buflen
, 0x52, r_id2
);
1123 ldm_error("r_size2 %d < 0", r_size2
);
1128 if (buffer
[0x12] & VBLK_FLAG_VOLU_DRIVE
) {
1129 r_drive
= ldm_relative(buffer
, buflen
, 0x52, r_size2
);
1131 ldm_error("r_drive %d < 0", r_drive
);
1138 ldm_error("len %d < 0", len
);
1141 len
+= VBLK_SIZE_VOL5
;
1142 if (len
> BE32(buffer
+ 0x14)) {
1143 ldm_error("len %d > BE32(buffer + 0x14) %d", len
,
1144 BE32(buffer
+ 0x14));
1147 volu
= &vb
->vblk
.volu
;
1148 ldm_get_vstr(buffer
+ 0x18 + r_name
, volu
->volume_type
,
1149 sizeof(volu
->volume_type
));
1150 memcpy(volu
->volume_state
, buffer
+ 0x18 + r_disable_drive_letter
,
1151 sizeof(volu
->volume_state
));
1152 volu
->size
= ldm_get_vnum(buffer
+ 0x3D + r_child
);
1153 volu
->partition_type
= buffer
[0x41 + r_size
];
1154 memcpy(volu
->guid
, buffer
+ 0x42 + r_size
, sizeof(volu
->guid
));
1155 if (buffer
[0x12] & VBLK_FLAG_VOLU_DRIVE
) {
1156 ldm_get_vstr(buffer
+ 0x52 + r_size
, volu
->drive_hint
,
1157 sizeof(volu
->drive_hint
));
1163 * ldm_parse_vblk - Read a raw VBLK object into a vblk structure
1164 * @buf: Block of data being worked on
1165 * @len: Size of the block of data
1166 * @vb: In-memory vblk in which to return information
1168 * Read a raw VBLK object into a vblk structure. This function just reads the
1169 * information common to all VBLK types, then delegates the rest of the work to
1170 * helper functions: ldm_parse_*.
1172 * Return: 'true' @vb contains a VBLK
1173 * 'false' @vb contents are not defined
1175 static bool ldm_parse_vblk (const u8
*buf
, int len
, struct vblk
*vb
)
1177 bool result
= false;
1180 BUG_ON (!buf
|| !vb
);
1182 r_objid
= ldm_relative (buf
, len
, 0x18, 0);
1184 ldm_error ("VBLK header is corrupt.");
1188 vb
->flags
= buf
[0x12];
1189 vb
->type
= buf
[0x13];
1190 vb
->obj_id
= ldm_get_vnum (buf
+ 0x18);
1191 ldm_get_vstr (buf
+0x18+r_objid
, vb
->name
, sizeof (vb
->name
));
1194 case VBLK_CMP3
: result
= ldm_parse_cmp3 (buf
, len
, vb
); break;
1195 case VBLK_DSK3
: result
= ldm_parse_dsk3 (buf
, len
, vb
); break;
1196 case VBLK_DSK4
: result
= ldm_parse_dsk4 (buf
, len
, vb
); break;
1197 case VBLK_DGR3
: result
= ldm_parse_dgr3 (buf
, len
, vb
); break;
1198 case VBLK_DGR4
: result
= ldm_parse_dgr4 (buf
, len
, vb
); break;
1199 case VBLK_PRT3
: result
= ldm_parse_prt3 (buf
, len
, vb
); break;
1200 case VBLK_VOL5
: result
= ldm_parse_vol5 (buf
, len
, vb
); break;
1204 ldm_debug ("Parsed VBLK 0x%llx (type: 0x%02x) ok.",
1205 (unsigned long long) vb
->obj_id
, vb
->type
);
1207 ldm_error ("Failed to parse VBLK 0x%llx (type: 0x%02x).",
1208 (unsigned long long) vb
->obj_id
, vb
->type
);
1215 * ldm_ldmdb_add - Adds a raw VBLK entry to the ldmdb database
1216 * @data: Raw VBLK to add to the database
1217 * @len: Size of the raw VBLK
1218 * @ldb: Cache of the database structures
1220 * The VBLKs are sorted into categories. Partitions are also sorted by offset.
1222 * N.B. This function does not check the validity of the VBLKs.
1224 * Return: 'true' The VBLK was added
1225 * 'false' An error occurred
1227 static bool ldm_ldmdb_add (u8
*data
, int len
, struct ldmdb
*ldb
)
1230 struct list_head
*item
;
1232 BUG_ON (!data
|| !ldb
);
1234 vb
= kmalloc (sizeof (*vb
), GFP_KERNEL
);
1236 ldm_crit ("Out of memory.");
1240 if (!ldm_parse_vblk (data
, len
, vb
)) {
1242 return false; /* Already logged */
1245 /* Put vblk into the correct list. */
1249 list_add (&vb
->list
, &ldb
->v_dgrp
);
1253 list_add (&vb
->list
, &ldb
->v_disk
);
1256 list_add (&vb
->list
, &ldb
->v_volu
);
1259 list_add (&vb
->list
, &ldb
->v_comp
);
1262 /* Sort by the partition's start sector. */
1263 list_for_each (item
, &ldb
->v_part
) {
1264 struct vblk
*v
= list_entry (item
, struct vblk
, list
);
1265 if ((v
->vblk
.part
.disk_id
== vb
->vblk
.part
.disk_id
) &&
1266 (v
->vblk
.part
.start
> vb
->vblk
.part
.start
)) {
1267 list_add_tail (&vb
->list
, &v
->list
);
1271 list_add_tail (&vb
->list
, &ldb
->v_part
);
1278 * ldm_frag_add - Add a VBLK fragment to a list
1279 * @data: Raw fragment to be added to the list
1280 * @size: Size of the raw fragment
1281 * @frags: Linked list of VBLK fragments
1283 * Fragmented VBLKs may not be consecutive in the database, so they are placed
1284 * in a list so they can be pieced together later.
1286 * Return: 'true' Success, the VBLK was added to the list
1287 * 'false' Error, a problem occurred
1289 static bool ldm_frag_add (const u8
*data
, int size
, struct list_head
*frags
)
1292 struct list_head
*item
;
1293 int rec
, num
, group
;
1295 BUG_ON (!data
|| !frags
);
1297 group
= BE32 (data
+ 0x08);
1298 rec
= BE16 (data
+ 0x0C);
1299 num
= BE16 (data
+ 0x0E);
1300 if ((num
< 1) || (num
> 4)) {
1301 ldm_error ("A VBLK claims to have %d parts.", num
);
1305 list_for_each (item
, frags
) {
1306 f
= list_entry (item
, struct frag
, list
);
1307 if (f
->group
== group
)
1311 f
= kmalloc (sizeof (*f
) + size
*num
, GFP_KERNEL
);
1313 ldm_crit ("Out of memory.");
1320 f
->map
= 0xFF << num
;
1322 list_add_tail (&f
->list
, frags
);
1324 if (f
->map
& (1 << rec
)) {
1325 ldm_error ("Duplicate VBLK, part %d.", rec
);
1326 f
->map
&= 0x7F; /* Mark the group as broken */
1330 f
->map
|= (1 << rec
);
1333 data
+= VBLK_SIZE_HEAD
;
1334 size
-= VBLK_SIZE_HEAD
;
1336 memcpy (f
->data
+rec
*(size
-VBLK_SIZE_HEAD
)+VBLK_SIZE_HEAD
, data
, size
);
1342 * ldm_frag_free - Free a linked list of VBLK fragments
1343 * @list: Linked list of fragments
1345 * Free a linked list of VBLK fragments
1349 static void ldm_frag_free (struct list_head
*list
)
1351 struct list_head
*item
, *tmp
;
1355 list_for_each_safe (item
, tmp
, list
)
1356 kfree (list_entry (item
, struct frag
, list
));
1360 * ldm_frag_commit - Validate fragmented VBLKs and add them to the database
1361 * @frags: Linked list of VBLK fragments
1362 * @ldb: Cache of the database structures
1364 * Now that all the fragmented VBLKs have been collected, they must be added to
1365 * the database for later use.
1367 * Return: 'true' All the fragments we added successfully
1368 * 'false' One or more of the fragments we invalid
1370 static bool ldm_frag_commit (struct list_head
*frags
, struct ldmdb
*ldb
)
1373 struct list_head
*item
;
1375 BUG_ON (!frags
|| !ldb
);
1377 list_for_each (item
, frags
) {
1378 f
= list_entry (item
, struct frag
, list
);
1380 if (f
->map
!= 0xFF) {
1381 ldm_error ("VBLK group %d is incomplete (0x%02x).",
1386 if (!ldm_ldmdb_add (f
->data
, f
->num
*ldb
->vm
.vblk_size
, ldb
))
1387 return false; /* Already logged */
1393 * ldm_get_vblks - Read the on-disk database of VBLKs into memory
1394 * @bdev: Device holding the LDM Database
1395 * @base: Offset, into @bdev, of the database
1396 * @ldb: Cache of the database structures
1398 * To use the information from the VBLKs, they need to be read from the disk,
1399 * unpacked and validated. We cache them in @ldb according to their type.
1401 * Return: 'true' All the VBLKs were read successfully
1402 * 'false' An error occurred
1404 static bool ldm_get_vblks (struct block_device
*bdev
, unsigned long base
,
1407 int size
, perbuf
, skip
, finish
, s
, v
, recs
;
1410 bool result
= false;
1413 BUG_ON (!bdev
|| !ldb
);
1415 size
= ldb
->vm
.vblk_size
;
1416 perbuf
= 512 / size
;
1417 skip
= ldb
->vm
.vblk_offset
>> 9; /* Bytes to sectors */
1418 finish
= (size
* ldb
->vm
.last_vblk_seq
) >> 9;
1420 for (s
= skip
; s
< finish
; s
++) { /* For each sector */
1421 data
= read_dev_sector (bdev
, base
+ OFF_VMDB
+ s
, §
);
1423 ldm_crit ("Disk read failed.");
1427 for (v
= 0; v
< perbuf
; v
++, data
+=size
) { /* For each vblk */
1428 if (MAGIC_VBLK
!= BE32 (data
)) {
1429 ldm_error ("Expected to find a VBLK.");
1433 recs
= BE16 (data
+ 0x0E); /* Number of records */
1435 if (!ldm_ldmdb_add (data
, size
, ldb
))
1436 goto out
; /* Already logged */
1437 } else if (recs
> 1) {
1438 if (!ldm_frag_add (data
, size
, &frags
))
1439 goto out
; /* Already logged */
1441 /* else Record is not in use, ignore it. */
1443 put_dev_sector (sect
);
1447 result
= ldm_frag_commit (&frags
, ldb
); /* Failures, already logged */
1450 put_dev_sector (sect
);
1451 ldm_frag_free (&frags
);
1457 * ldm_free_vblks - Free a linked list of vblk's
1458 * @lh: Head of a linked list of struct vblk
1460 * Free a list of vblk's and free the memory used to maintain the list.
1464 static void ldm_free_vblks (struct list_head
*lh
)
1466 struct list_head
*item
, *tmp
;
1470 list_for_each_safe (item
, tmp
, lh
)
1471 kfree (list_entry (item
, struct vblk
, list
));
1476 * ldm_partition - Find out whether a device is a dynamic disk and handle it
1477 * @pp: List of the partitions parsed so far
1478 * @bdev: Device holding the LDM Database
1480 * This determines whether the device @bdev is a dynamic disk and if so creates
1481 * the partitions necessary in the gendisk structure pointed to by @hd.
1483 * We create a dummy device 1, which contains the LDM database, and then create
1484 * each partition described by the LDM database in sequence as devices 2+. For
1485 * example, if the device is hda, we would have: hda1: LDM database, hda2, hda3,
1486 * and so on: the actual data containing partitions.
1488 * Return: 1 Success, @bdev is a dynamic disk and we handled it
1489 * 0 Success, @bdev is not a dynamic disk
1490 * -1 An error occurred before enough information had been read
1491 * Or @bdev is a dynamic disk, but it may be corrupted
1493 int ldm_partition (struct parsed_partitions
*pp
, struct block_device
*bdev
)
1499 BUG_ON (!pp
|| !bdev
);
1501 /* Look for signs of a Dynamic Disk */
1502 if (!ldm_validate_partition_table (bdev
))
1505 ldb
= kmalloc (sizeof (*ldb
), GFP_KERNEL
);
1507 ldm_crit ("Out of memory.");
1511 /* Parse and check privheads. */
1512 if (!ldm_validate_privheads (bdev
, &ldb
->ph
))
1513 goto out
; /* Already logged */
1515 /* All further references are relative to base (database start). */
1516 base
= ldb
->ph
.config_start
;
1518 /* Parse and check tocs and vmdb. */
1519 if (!ldm_validate_tocblocks (bdev
, base
, ldb
) ||
1520 !ldm_validate_vmdb (bdev
, base
, ldb
))
1521 goto out
; /* Already logged */
1523 /* Initialize vblk lists in ldmdb struct */
1524 INIT_LIST_HEAD (&ldb
->v_dgrp
);
1525 INIT_LIST_HEAD (&ldb
->v_disk
);
1526 INIT_LIST_HEAD (&ldb
->v_volu
);
1527 INIT_LIST_HEAD (&ldb
->v_comp
);
1528 INIT_LIST_HEAD (&ldb
->v_part
);
1530 if (!ldm_get_vblks (bdev
, base
, ldb
)) {
1531 ldm_crit ("Failed to read the VBLKs from the database.");
1535 /* Finally, create the data partition devices. */
1536 if (ldm_create_data_partitions (pp
, ldb
)) {
1537 ldm_debug ("Parsed LDM database successfully.");
1540 /* else Already logged */
1543 ldm_free_vblks (&ldb
->v_dgrp
);
1544 ldm_free_vblks (&ldb
->v_disk
);
1545 ldm_free_vblks (&ldb
->v_volu
);
1546 ldm_free_vblks (&ldb
->v_comp
);
1547 ldm_free_vblks (&ldb
->v_part
);
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