blob: 99873a2b4cbcd749574e874757af92e9b418c1a2 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
2 * ldm - Support for Windows Logical Disk Manager (Dynamic Disks)
3 *
4 * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
Anton Altaparmakovdde33342007-05-21 09:37:42 +01005 * Copyright (c) 2001-2007 Anton Altaparmakov
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
7 *
Anton Altaparmakovdde33342007-05-21 09:37:42 +01008 * Documentation is available at http://www.linux-ntfs.org/content/view/19/37/
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
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
13 * version.
14 *
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
18 * details.
19 *
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
24 */
25
26#include <linux/slab.h>
27#include <linux/pagemap.h>
28#include <linux/stringify.h>
29#include "ldm.h"
30#include "check.h"
31#include "msdos.h"
32
Linus Torvalds1da177e2005-04-16 15:20:36 -070033/**
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
37 *
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.
40 */
41#ifndef CONFIG_LDM_DEBUG
42#define ldm_debug(...) do {} while (0)
43#else
44#define ldm_debug(f, a...) _ldm_printk (KERN_DEBUG, __FUNCTION__, f, ##a)
45#endif
46
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)
50
51__attribute__ ((format (printf, 3, 4)))
52static void _ldm_printk (const char *level, const char *function,
53 const char *fmt, ...)
54{
55 static char buf[128];
56 va_list args;
57
58 va_start (args, fmt);
59 vsnprintf (buf, sizeof (buf), fmt, args);
60 va_end (args);
61
62 printk ("%s%s(): %s\n", level, function, buf);
63}
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065/**
66 * ldm_parse_hexbyte - Convert a ASCII hex number to a byte
67 * @src: Pointer to at least 2 characters to convert.
68 *
69 * Convert a two character ASCII hex string to a number.
70 *
71 * Return: 0-255 Success, the byte was parsed correctly
72 * -1 Error, an invalid character was supplied
73 */
74static int ldm_parse_hexbyte (const u8 *src)
75{
76 unsigned int x; /* For correct wrapping */
77 int h;
78
79 /* high part */
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;
83 else return -1;
84 h <<= 4;
85
86 /* low part */
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);
90 return -1;
91}
92
93/**
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)
97 *
98 * N.B. The GUID need not be NULL terminated.
99 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700100 * Return: 'true' @dest contains binary GUID
101 * 'false' @dest contents are undefined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700103static bool ldm_parse_guid (const u8 *src, u8 *dest)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104{
105 static const int size[] = { 4, 2, 2, 2, 6 };
106 int i, j, v;
107
108 if (src[8] != '-' || src[13] != '-' ||
109 src[18] != '-' || src[23] != '-')
Richard Knutsson130c6b92006-09-30 23:27:15 -0700110 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
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)
Richard Knutsson130c6b92006-09-30 23:27:15 -0700115 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
Richard Knutsson130c6b92006-09-30 23:27:15 -0700117 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118}
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120/**
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
124 *
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.
127 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700128 * Return: 'true' @ph contains the PRIVHEAD data
129 * 'false' @ph contents are undefined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 */
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100131static bool ldm_parse_privhead(const u8 *data, struct privhead *ph)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132{
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100133 bool is_vista = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100135 BUG_ON(!data || !ph);
136 if (MAGIC_PRIVHEAD != BE64(data)) {
137 ldm_error("Cannot find PRIVHEAD structure. LDM database is"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 " corrupt. Aborting.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700139 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100141 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)
149 is_vista = true;
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);
Richard Knutsson130c6b92006-09-30 23:27:15 -0700153 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100155 ldm_debug("PRIVHEAD version %d.%d (Windows %s).", ph->ver_major,
156 ph->ver_minor, is_vista ? "Vista" : "2000/XP");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 if (ph->config_size != LDM_DB_SIZE) { /* 1 MiB in sectors. */
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100158 /* Warn the user and continue, carefully. */
159 ldm_info("Database is normally %u bytes, it claims to "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 "be %llu bytes.", LDM_DB_SIZE,
Jeff Garzik72dd9ca2007-05-22 00:28:11 -0400161 (unsigned long long)ph->config_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100163 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");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700166 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100168 if (!ldm_parse_guid(data + 0x0030, ph->disk_id)) {
169 ldm_error("PRIVHEAD contains an invalid GUID.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700170 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100172 ldm_debug("Parsed PRIVHEAD successfully.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700173 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
176/**
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
180 *
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
183 * information.
184 *
185 * N.B. The *_start and *_size values returned in @toc are not range-checked.
186 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700187 * Return: 'true' @toc contains the TOCBLOCK data
188 * 'false' @toc contents are undefined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700190static bool ldm_parse_tocblock (const u8 *data, struct tocblock *toc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191{
192 BUG_ON (!data || !toc);
193
194 if (MAGIC_TOCBLOCK != BE64 (data)) {
195 ldm_crit ("Cannot find TOCBLOCK, database may be corrupt.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700196 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 }
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);
202
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);
Richard Knutsson130c6b92006-09-30 23:27:15 -0700207 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 }
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);
Richard Knutsson130c6b92006-09-30 23:27:15 -0700217 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 }
219 ldm_debug ("Parsed TOCBLOCK successfully.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700220 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221}
222
223/**
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
227 *
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.
230 *
231 * N.B. The *_start, *_size and *_seq values will be range-checked later.
232 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700233 * Return: 'true' @vm contains VMDB info
234 * 'false' @vm contents are undefined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700236static bool ldm_parse_vmdb (const u8 *data, struct vmdb *vm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
238 BUG_ON (!data || !vm);
239
240 if (MAGIC_VMDB != BE32 (data)) {
241 ldm_crit ("Cannot find the VMDB, database may be corrupt.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700242 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 }
244
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);
Richard Knutsson130c6b92006-09-30 23:27:15 -0700250 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 }
252
253 vm->vblk_size = BE32 (data + 0x08);
254 vm->vblk_offset = BE32 (data + 0x0C);
255 vm->last_vblk_seq = BE32 (data + 0x04);
256
257 ldm_debug ("Parsed VMDB successfully.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700258 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259}
260
261/**
262 * ldm_compare_privheads - Compare two privhead objects
263 * @ph1: First privhead
264 * @ph2: Second privhead
265 *
266 * This compares the two privhead structures @ph1 and @ph2.
267 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700268 * Return: 'true' Identical
269 * 'false' Different
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700271static bool ldm_compare_privheads (const struct privhead *ph1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 const struct privhead *ph2)
273{
274 BUG_ON (!ph1 || !ph2);
275
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));
283}
284
285/**
286 * ldm_compare_tocblocks - Compare two tocblock objects
287 * @toc1: First toc
288 * @toc2: Second toc
289 *
290 * This compares the two tocblock structures @toc1 and @toc2.
291 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700292 * Return: 'true' Identical
293 * 'false' Different
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700295static bool ldm_compare_tocblocks (const struct tocblock *toc1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 const struct tocblock *toc2)
297{
298 BUG_ON (!toc1 || !toc2);
299
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)));
308}
309
310/**
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
314 *
315 * Read and compare all three privheads from disk.
316 *
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.
320 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700321 * Return: 'true' Success
322 * 'false' Error
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700324static bool ldm_validate_privheads (struct block_device *bdev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 struct privhead *ph1)
326{
327 static const int off[3] = { OFF_PRIV1, OFF_PRIV2, OFF_PRIV3 };
328 struct privhead *ph[3] = { ph1 };
329 Sector sect;
330 u8 *data;
Richard Knutsson130c6b92006-09-30 23:27:15 -0700331 bool result = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 long num_sects;
333 int i;
334
335 BUG_ON (!bdev || !ph1);
336
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.");
341 goto out;
342 }
343
344 /* off[1 & 2] are relative to ph[0]->config_start */
345 ph[0]->config_start = 0;
346
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], &sect);
351 if (!data) {
352 ldm_crit ("Disk read failed.");
353 goto out;
354 }
355 result = ldm_parse_privhead (data, ph[i]);
356 put_dev_sector (sect);
357 if (!result) {
358 ldm_error ("Cannot find PRIVHEAD %d.", i+1); /* Log again */
359 if (i < 2)
360 goto out; /* Already logged */
361 else
362 break; /* FIXME ignore for now, 3rd PH can fail on odd-sized disks */
363 }
364 }
365
366 num_sects = bdev->bd_inode->i_size >> 9;
367
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.");
371 goto out;
372 }
373
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.");
378 goto out;
379 }
380
381 if (!ldm_compare_privheads (ph[0], ph[1])) {
382 ldm_crit ("Primary and backup PRIVHEADs don't match.");
383 goto out;
384 }
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.");
388 goto out;
389 }*/
390 ldm_debug ("Validated PRIVHEADs successfully.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700391 result = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392out:
393 kfree (ph[1]);
394 kfree (ph[2]);
395 return result;
396}
397
398/**
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
403 *
404 * Find and compare the four tables of contents of the LDM Database stored on
405 * @bdev and return the parsed information into @toc1.
406 *
407 * The offsets and sizes of the configs are range-checked against a privhead.
408 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700409 * Return: 'true' @toc1 contains validated TOCBLOCK info
410 * 'false' @toc1 contents are undefined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 */
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100412static bool ldm_validate_tocblocks(struct block_device *bdev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 unsigned long base, struct ldmdb *ldb)
414{
415 static const int off[4] = { OFF_TOCB1, OFF_TOCB2, OFF_TOCB3, OFF_TOCB4};
416 struct tocblock *tb[4];
417 struct privhead *ph;
418 Sector sect;
419 u8 *data;
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100420 int i, nr_tbs;
Richard Knutsson130c6b92006-09-30 23:27:15 -0700421 bool result = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100423 BUG_ON(!bdev || !ldb);
424 ph = &ldb->ph;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 tb[0] = &ldb->toc;
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100426 tb[1] = kmalloc(sizeof(*tb[1]) * 3, GFP_KERNEL);
427 if (!tb[1]) {
428 ldm_crit("Out of memory.");
429 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100431 tb[2] = (struct tocblock*)((u8*)tb[1] + sizeof(*tb[1]));
432 tb[3] = (struct tocblock*)((u8*)tb[2] + sizeof(*tb[2]));
433 /*
434 * Try to read and parse all four TOCBLOCKs.
435 *
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.
438 */
439 for (nr_tbs = i = 0; i < 4; i++) {
440 data = read_dev_sector(bdev, base + off[i], &sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 if (!data) {
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100442 ldm_error("Disk read failed for TOCBLOCK %d.", i);
443 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100445 if (ldm_parse_tocblock(data, tb[nr_tbs]))
446 nr_tbs++;
447 put_dev_sector(sect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100449 if (!nr_tbs) {
450 ldm_crit("Failed to find a valid TOCBLOCK.");
451 goto err;
452 }
453 /* Range check the TOCBLOCK against a privhead. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 if (((tb[0]->bitmap1_start + tb[0]->bitmap1_size) > ph->config_size) ||
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100455 ((tb[0]->bitmap2_start + tb[0]->bitmap2_size) >
456 ph->config_size)) {
457 ldm_crit("The bitmaps are out of range. Giving up.");
458 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100460 /* 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);
464 goto err;
465 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100467 ldm_debug("Validated %d TOCBLOCKs successfully.", nr_tbs);
Richard Knutsson130c6b92006-09-30 23:27:15 -0700468 result = true;
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100469err:
470 kfree(tb[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 return result;
472}
473
474/**
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
479 *
480 * Find the vmdb of the LDM Database stored on @bdev and return the parsed
481 * information in @ldb.
482 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700483 * Return: 'true' @ldb contains validated VBDB info
484 * 'false' @ldb contents are undefined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700486static bool ldm_validate_vmdb (struct block_device *bdev, unsigned long base,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 struct ldmdb *ldb)
488{
489 Sector sect;
490 u8 *data;
Richard Knutsson130c6b92006-09-30 23:27:15 -0700491 bool result = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 struct vmdb *vm;
493 struct tocblock *toc;
494
495 BUG_ON (!bdev || !ldb);
496
497 vm = &ldb->vm;
498 toc = &ldb->toc;
499
500 data = read_dev_sector (bdev, base + OFF_VMDB, &sect);
501 if (!data) {
502 ldm_crit ("Disk read failed.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700503 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 }
505
506 if (!ldm_parse_vmdb (data, vm))
507 goto out; /* Already logged */
508
509 /* Are there uncommitted transactions? */
510 if (BE16(data + 0x10) != 0x01) {
511 ldm_crit ("Database is not in a consistent state. Aborting.");
512 goto out;
513 }
514
515 if (vm->vblk_offset != 512)
516 ldm_info ("VBLKs start at offset 0x%04x.", vm->vblk_offset);
517
518 /*
519 * The last_vblkd_seq can be before the end of the vmdb, just make sure
520 * it is not out of bounds.
521 */
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.");
525 goto out;
526 }
527
Richard Knutsson130c6b92006-09-30 23:27:15 -0700528 result = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529out:
530 put_dev_sector (sect);
531 return result;
532}
533
534
535/**
536 * ldm_validate_partition_table - Determine whether bdev might be a dynamic disk
537 * @bdev: Device holding the LDM Database
538 *
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
542 * dynamic disks).
543 *
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.
547 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700548 * Return: 'true' @bdev is a dynamic disk
549 * 'false' @bdev is not a dynamic disk, or an error occurred
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700551static bool ldm_validate_partition_table (struct block_device *bdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552{
553 Sector sect;
554 u8 *data;
555 struct partition *p;
556 int i;
Richard Knutsson130c6b92006-09-30 23:27:15 -0700557 bool result = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
559 BUG_ON (!bdev);
560
561 data = read_dev_sector (bdev, 0, &sect);
562 if (!data) {
563 ldm_crit ("Disk read failed.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700564 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 }
566
567 if (*(__le16*) (data + 0x01FE) != cpu_to_le16 (MSDOS_LABEL_MAGIC))
568 goto out;
569
570 p = (struct partition*)(data + 0x01BE);
571 for (i = 0; i < 4; i++, p++)
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100572 if (SYS_IND (p) == LDM_PARTITION) {
Richard Knutsson130c6b92006-09-30 23:27:15 -0700573 result = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 break;
575 }
576
577 if (result)
578 ldm_debug ("Found W2K dynamic disk partition type.");
579
580out:
581 put_dev_sector (sect);
582 return result;
583}
584
585/**
586 * ldm_get_disk_objid - Search a linked list of vblk's for a given Disk Id
587 * @ldb: Cache of the database structures
588 *
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
592 * list of vblk's.
593 *
594 * Return: Pointer, A matching vblk was found
595 * NULL, No match, or an error
596 */
597static struct vblk * ldm_get_disk_objid (const struct ldmdb *ldb)
598{
599 struct list_head *item;
600
601 BUG_ON (!ldb);
602
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))
606 return v;
607 }
608
609 return NULL;
610}
611
612/**
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
616 *
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.
620 *
621 * Add each partition in our database, to the parsed_partitions structure.
622 *
623 * N.B. This function creates the partitions in the order it finds partition
624 * objects in the linked list.
625 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700626 * Return: 'true' Partition created
627 * 'false' Error, probably a range checking problem
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700629static bool ldm_create_data_partitions (struct parsed_partitions *pp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 const struct ldmdb *ldb)
631{
632 struct list_head *item;
633 struct vblk *vb;
634 struct vblk *disk;
635 struct vblk_part *part;
636 int part_num = 1;
637
638 BUG_ON (!pp || !ldb);
639
640 disk = ldm_get_disk_objid (ldb);
641 if (!disk) {
642 ldm_crit ("Can't find the ID of this disk in the database.");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700643 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 }
645
646 printk (" [LDM]");
647
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;
652
653 if (part->disk_id != disk->obj_id)
654 continue;
655
656 put_partition (pp, part_num, ldb->ph.logical_disk_start +
657 part->start, part->size);
658 part_num++;
659 }
660
661 printk ("\n");
Richard Knutsson130c6b92006-09-30 23:27:15 -0700662 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663}
664
665
666/**
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
672 *
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.
676 *
677 * Return: -1 Error, the calculated offset exceeded the size of the buffer
678 * n OK, a range-checked offset into buffer
679 */
680static int ldm_relative (const u8 *buffer, int buflen, int base, int offset)
681{
682
683 base += offset;
684 if ((!buffer) || (offset < 0) || (base > buflen))
685 return -1;
686 if ((base + buffer[base]) >= buflen)
687 return -1;
688
689 return buffer[base] + offset + 1;
690}
691
692/**
693 * ldm_get_vnum - Convert a variable-width, big endian number, into cpu order
694 * @block: Pointer to the variable-width number to convert
695 *
696 * Large numbers in the LDM Database are often stored in a packed format. Each
697 * number is prefixed by a one byte width marker. All numbers in the database
698 * are stored in big-endian byte order. This function reads one of these
699 * numbers and returns the result
700 *
701 * N.B. This function DOES NOT perform any range checking, though the most
702 * it will read is eight bytes.
703 *
704 * Return: n A number
705 * 0 Zero, or an error occurred
706 */
707static u64 ldm_get_vnum (const u8 *block)
708{
709 u64 tmp = 0;
710 u8 length;
711
712 BUG_ON (!block);
713
714 length = *block++;
715
716 if (length && length <= 8)
717 while (length--)
718 tmp = (tmp << 8) | *block++;
719 else
720 ldm_error ("Illegal length %d.", length);
721
722 return tmp;
723}
724
725/**
726 * ldm_get_vstr - Read a length-prefixed string into a buffer
727 * @block: Pointer to the length marker
728 * @buffer: Location to copy string to
729 * @buflen: Size of the output buffer
730 *
731 * Many of the strings in the LDM Database are not NULL terminated. Instead
732 * they are prefixed by a one byte length marker. This function copies one of
733 * these strings into a buffer.
734 *
735 * N.B. This function DOES NOT perform any range checking on the input.
736 * If the buffer is too small, the output will be truncated.
737 *
738 * Return: 0, Error and @buffer contents are undefined
739 * n, String length in characters (excluding NULL)
740 * buflen-1, String was truncated.
741 */
742static int ldm_get_vstr (const u8 *block, u8 *buffer, int buflen)
743{
744 int length;
745
746 BUG_ON (!block || !buffer);
747
748 length = block[0];
749 if (length >= buflen) {
750 ldm_error ("Truncating string %d -> %d.", length, buflen);
751 length = buflen - 1;
752 }
753 memcpy (buffer, block + 1, length);
754 buffer[length] = 0;
755 return length;
756}
757
758
759/**
760 * ldm_parse_cmp3 - Read a raw VBLK Component object into a vblk structure
761 * @buffer: Block of data being worked on
762 * @buflen: Size of the block of data
763 * @vb: In-memory vblk in which to return information
764 *
765 * Read a raw VBLK Component object (version 3) into a vblk structure.
766 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700767 * Return: 'true' @vb contains a Component VBLK
768 * 'false' @vb contents are not defined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700770static bool ldm_parse_cmp3 (const u8 *buffer, int buflen, struct vblk *vb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771{
772 int r_objid, r_name, r_vstate, r_child, r_parent, r_stripe, r_cols, len;
773 struct vblk_comp *comp;
774
775 BUG_ON (!buffer || !vb);
776
777 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
778 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
779 r_vstate = ldm_relative (buffer, buflen, 0x18, r_name);
780 r_child = ldm_relative (buffer, buflen, 0x1D, r_vstate);
781 r_parent = ldm_relative (buffer, buflen, 0x2D, r_child);
782
783 if (buffer[0x12] & VBLK_FLAG_COMP_STRIPE) {
784 r_stripe = ldm_relative (buffer, buflen, 0x2E, r_parent);
785 r_cols = ldm_relative (buffer, buflen, 0x2E, r_stripe);
786 len = r_cols;
787 } else {
788 r_stripe = 0;
789 r_cols = 0;
790 len = r_parent;
791 }
792 if (len < 0)
Richard Knutsson130c6b92006-09-30 23:27:15 -0700793 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794
795 len += VBLK_SIZE_CMP3;
796 if (len != BE32 (buffer + 0x14))
Richard Knutsson130c6b92006-09-30 23:27:15 -0700797 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
799 comp = &vb->vblk.comp;
800 ldm_get_vstr (buffer + 0x18 + r_name, comp->state,
801 sizeof (comp->state));
802 comp->type = buffer[0x18 + r_vstate];
803 comp->children = ldm_get_vnum (buffer + 0x1D + r_vstate);
804 comp->parent_id = ldm_get_vnum (buffer + 0x2D + r_child);
805 comp->chunksize = r_stripe ? ldm_get_vnum (buffer+r_parent+0x2E) : 0;
806
Richard Knutsson130c6b92006-09-30 23:27:15 -0700807 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808}
809
810/**
811 * ldm_parse_dgr3 - Read a raw VBLK Disk Group object into a vblk structure
812 * @buffer: Block of data being worked on
813 * @buflen: Size of the block of data
814 * @vb: In-memory vblk in which to return information
815 *
816 * Read a raw VBLK Disk Group object (version 3) into a vblk structure.
817 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700818 * Return: 'true' @vb contains a Disk Group VBLK
819 * 'false' @vb contents are not defined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 */
821static int ldm_parse_dgr3 (const u8 *buffer, int buflen, struct vblk *vb)
822{
823 int r_objid, r_name, r_diskid, r_id1, r_id2, len;
824 struct vblk_dgrp *dgrp;
825
826 BUG_ON (!buffer || !vb);
827
828 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
829 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
830 r_diskid = ldm_relative (buffer, buflen, 0x18, r_name);
831
832 if (buffer[0x12] & VBLK_FLAG_DGR3_IDS) {
833 r_id1 = ldm_relative (buffer, buflen, 0x24, r_diskid);
834 r_id2 = ldm_relative (buffer, buflen, 0x24, r_id1);
835 len = r_id2;
836 } else {
837 r_id1 = 0;
838 r_id2 = 0;
839 len = r_diskid;
840 }
841 if (len < 0)
Richard Knutsson130c6b92006-09-30 23:27:15 -0700842 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
844 len += VBLK_SIZE_DGR3;
845 if (len != BE32 (buffer + 0x14))
Richard Knutsson130c6b92006-09-30 23:27:15 -0700846 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
848 dgrp = &vb->vblk.dgrp;
849 ldm_get_vstr (buffer + 0x18 + r_name, dgrp->disk_id,
850 sizeof (dgrp->disk_id));
Richard Knutsson130c6b92006-09-30 23:27:15 -0700851 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852}
853
854/**
855 * ldm_parse_dgr4 - Read a raw VBLK Disk Group object into a vblk structure
856 * @buffer: Block of data being worked on
857 * @buflen: Size of the block of data
858 * @vb: In-memory vblk in which to return information
859 *
860 * Read a raw VBLK Disk Group object (version 4) into a vblk structure.
861 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700862 * Return: 'true' @vb contains a Disk Group VBLK
863 * 'false' @vb contents are not defined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700865static bool ldm_parse_dgr4 (const u8 *buffer, int buflen, struct vblk *vb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866{
867 char buf[64];
868 int r_objid, r_name, r_id1, r_id2, len;
869 struct vblk_dgrp *dgrp;
870
871 BUG_ON (!buffer || !vb);
872
873 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
874 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
875
876 if (buffer[0x12] & VBLK_FLAG_DGR4_IDS) {
877 r_id1 = ldm_relative (buffer, buflen, 0x44, r_name);
878 r_id2 = ldm_relative (buffer, buflen, 0x44, r_id1);
879 len = r_id2;
880 } else {
881 r_id1 = 0;
882 r_id2 = 0;
883 len = r_name;
884 }
885 if (len < 0)
Richard Knutsson130c6b92006-09-30 23:27:15 -0700886 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887
888 len += VBLK_SIZE_DGR4;
889 if (len != BE32 (buffer + 0x14))
Richard Knutsson130c6b92006-09-30 23:27:15 -0700890 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891
892 dgrp = &vb->vblk.dgrp;
893
894 ldm_get_vstr (buffer + 0x18 + r_objid, buf, sizeof (buf));
Richard Knutsson130c6b92006-09-30 23:27:15 -0700895 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896}
897
898/**
899 * ldm_parse_dsk3 - Read a raw VBLK Disk object into a vblk structure
900 * @buffer: Block of data being worked on
901 * @buflen: Size of the block of data
902 * @vb: In-memory vblk in which to return information
903 *
904 * Read a raw VBLK Disk object (version 3) into a vblk structure.
905 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700906 * Return: 'true' @vb contains a Disk VBLK
907 * 'false' @vb contents are not defined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700909static bool ldm_parse_dsk3 (const u8 *buffer, int buflen, struct vblk *vb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910{
911 int r_objid, r_name, r_diskid, r_altname, len;
912 struct vblk_disk *disk;
913
914 BUG_ON (!buffer || !vb);
915
916 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
917 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
918 r_diskid = ldm_relative (buffer, buflen, 0x18, r_name);
919 r_altname = ldm_relative (buffer, buflen, 0x18, r_diskid);
920 len = r_altname;
921 if (len < 0)
Richard Knutsson130c6b92006-09-30 23:27:15 -0700922 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923
924 len += VBLK_SIZE_DSK3;
925 if (len != BE32 (buffer + 0x14))
Richard Knutsson130c6b92006-09-30 23:27:15 -0700926 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
928 disk = &vb->vblk.disk;
929 ldm_get_vstr (buffer + 0x18 + r_diskid, disk->alt_name,
930 sizeof (disk->alt_name));
931 if (!ldm_parse_guid (buffer + 0x19 + r_name, disk->disk_id))
Richard Knutsson130c6b92006-09-30 23:27:15 -0700932 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933
Richard Knutsson130c6b92006-09-30 23:27:15 -0700934 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935}
936
937/**
938 * ldm_parse_dsk4 - Read a raw VBLK Disk object into a vblk structure
939 * @buffer: Block of data being worked on
940 * @buflen: Size of the block of data
941 * @vb: In-memory vblk in which to return information
942 *
943 * Read a raw VBLK Disk object (version 4) into a vblk structure.
944 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700945 * Return: 'true' @vb contains a Disk VBLK
946 * 'false' @vb contents are not defined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 */
Richard Knutsson130c6b92006-09-30 23:27:15 -0700948static bool ldm_parse_dsk4 (const u8 *buffer, int buflen, struct vblk *vb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949{
950 int r_objid, r_name, len;
951 struct vblk_disk *disk;
952
953 BUG_ON (!buffer || !vb);
954
955 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
956 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
957 len = r_name;
958 if (len < 0)
Richard Knutsson130c6b92006-09-30 23:27:15 -0700959 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
961 len += VBLK_SIZE_DSK4;
962 if (len != BE32 (buffer + 0x14))
Richard Knutsson130c6b92006-09-30 23:27:15 -0700963 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
965 disk = &vb->vblk.disk;
966 memcpy (disk->disk_id, buffer + 0x18 + r_name, GUID_SIZE);
Richard Knutsson130c6b92006-09-30 23:27:15 -0700967 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968}
969
970/**
971 * ldm_parse_prt3 - Read a raw VBLK Partition object into a vblk structure
972 * @buffer: Block of data being worked on
973 * @buflen: Size of the block of data
974 * @vb: In-memory vblk in which to return information
975 *
976 * Read a raw VBLK Partition object (version 3) into a vblk structure.
977 *
Richard Knutsson130c6b92006-09-30 23:27:15 -0700978 * Return: 'true' @vb contains a Partition VBLK
979 * 'false' @vb contents are not defined
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 */
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100981static bool ldm_parse_prt3(const u8 *buffer, int buflen, struct vblk *vb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982{
983 int r_objid, r_name, r_size, r_parent, r_diskid, r_index, len;
984 struct vblk_part *part;
985
Anton Altaparmakovdde33342007-05-21 09:37:42 +0100986 BUG_ON(!buffer || !vb);
987 r_objid = ldm_relative(buffer, buflen, 0x18, 0);
988 if (r_objid < 0) {
989 ldm_error("r_objid %d < 0", r_objid);
990 return false;
991 }
992 r_name = ldm_relative(buffer, buflen, 0x18, r_objid);
993 if (r_name < 0) {
994 ldm_error("r_name %d < 0", r_name);
995 return false;
996 }
997 r_size = ldm_relative(buffer, buflen, 0x34, r_name);
998 if (r_size < 0) {
999 ldm_error("r_size %d < 0", r_size);
1000 return false;
1001 }
1002 r_parent = ldm_relative(buffer, buflen, 0x34, r_size);
1003 if (r_parent < 0) {
1004 ldm_error("r_parent %d < 0", r_parent);
1005 return false;
1006 }
1007 r_diskid = ldm_relative(buffer, buflen, 0x34, r_parent);
1008 if (r_diskid < 0) {
1009 ldm_error("r_diskid %d < 0", r_diskid);
1010 return false;
1011 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 if (buffer[0x12] & VBLK_FLAG_PART_INDEX) {
Anton Altaparmakovdde33342007-05-21 09:37:42 +01001013 r_index = ldm_relative(buffer, buflen, 0x34, r_diskid);
1014 if (r_index < 0) {
1015 ldm_error("r_index %d < 0", r_index);
1016 return false;
1017 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 len = r_index;
1019 } else {
1020 r_index = 0;
1021 len = r_diskid;
1022 }
Anton Altaparmakovdde33342007-05-21 09:37:42 +01001023 if (len < 0) {
1024 ldm_error("len %d < 0", len);
Richard Knutsson130c6b92006-09-30 23:27:15 -07001025 return false;
Anton Altaparmakovdde33342007-05-21 09:37:42 +01001026 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 len += VBLK_SIZE_PRT3;
Anton Altaparmakovdde33342007-05-21 09:37:42 +01001028 if (len > BE32(buffer + 0x14)) {
1029 ldm_error("len %d > BE32(buffer + 0x14) %d", len,
1030 BE32(buffer + 0x14));
Richard Knutsson130c6b92006-09-30 23:27:15 -07001031 return false;
Anton Altaparmakovdde33342007-05-21 09:37:42 +01001032 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 part = &vb->vblk.part;
Anton Altaparmakovdde33342007-05-21 09:37:42 +01001034 part->start = BE64(buffer + 0x24 + r_name);
1035 part->volume_offset = BE64(buffer + 0x2C + r_name);
1036 part->size = ldm_get_vnum(buffer + 0x34 + r_name);
1037 part->parent_id = ldm_get_vnum(buffer + 0x34 + r_size);
1038 part->disk_id = ldm_get_vnum(buffer + 0x34 + r_parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 if (vb->flags & VBLK_FLAG_PART_INDEX)
1040 part->partnum = buffer[0x35 + r_diskid];
1041 else
1042 part->partnum = 0;
Richard Knutsson130c6b92006-09-30 23:27:15 -07001043 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044}
1045
1046/**
1047 * ldm_parse_vol5 - Read a raw VBLK Volume object into a vblk structure
1048 * @buffer: Block of data being worked on
1049 * @buflen: Size of the block of data
1050 * @vb: In-memory vblk in which to return information
1051 *
1052 * Read a raw VBLK Volume object (version 5) into a vblk structure.
1053 *
Richard Knutsson130c6b92006-09-30 23:27:15 -07001054 * Return: 'true' @vb contains a Volume VBLK
1055 * 'false' @vb contents are not defined
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 */
Richard Knutsson130c6b92006-09-30 23:27:15 -07001057static bool ldm_parse_vol5 (const u8 *buffer, int buflen, struct vblk *vb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058{
1059 int r_objid, r_name, r_vtype, r_child, r_size, r_id1, r_id2, r_size2;
1060 int r_drive, len;
1061 struct vblk_volu *volu;
1062
1063 BUG_ON (!buffer || !vb);
1064
1065 r_objid = ldm_relative (buffer, buflen, 0x18, 0);
1066 r_name = ldm_relative (buffer, buflen, 0x18, r_objid);
1067 r_vtype = ldm_relative (buffer, buflen, 0x18, r_name);
1068 r_child = ldm_relative (buffer, buflen, 0x2E, r_vtype);
1069 r_size = ldm_relative (buffer, buflen, 0x3E, r_child);
1070
1071 if (buffer[0x12] & VBLK_FLAG_VOLU_ID1)
1072 r_id1 = ldm_relative (buffer, buflen, 0x53, r_size);
1073 else
1074 r_id1 = r_size;
1075
1076 if (buffer[0x12] & VBLK_FLAG_VOLU_ID2)
1077 r_id2 = ldm_relative (buffer, buflen, 0x53, r_id1);
1078 else
1079 r_id2 = r_id1;
1080
1081 if (buffer[0x12] & VBLK_FLAG_VOLU_SIZE)
1082 r_size2 = ldm_relative (buffer, buflen, 0x53, r_id2);
1083 else
1084 r_size2 = r_id2;
1085
1086 if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE)
1087 r_drive = ldm_relative (buffer, buflen, 0x53, r_size2);
1088 else
1089 r_drive = r_size2;
1090
1091 len = r_drive;
1092 if (len < 0)
Richard Knutsson130c6b92006-09-30 23:27:15 -07001093 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
1095 len += VBLK_SIZE_VOL5;
1096 if (len != BE32 (buffer + 0x14))
Richard Knutsson130c6b92006-09-30 23:27:15 -07001097 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
1099 volu = &vb->vblk.volu;
1100
1101 ldm_get_vstr (buffer + 0x18 + r_name, volu->volume_type,
1102 sizeof (volu->volume_type));
1103 memcpy (volu->volume_state, buffer + 0x19 + r_vtype,
1104 sizeof (volu->volume_state));
1105 volu->size = ldm_get_vnum (buffer + 0x3E + r_child);
1106 volu->partition_type = buffer[0x42 + r_size];
1107 memcpy (volu->guid, buffer + 0x43 + r_size, sizeof (volu->guid));
1108 if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
1109 ldm_get_vstr (buffer + 0x53 + r_size, volu->drive_hint,
1110 sizeof (volu->drive_hint));
1111 }
Richard Knutsson130c6b92006-09-30 23:27:15 -07001112 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113}
1114
1115/**
1116 * ldm_parse_vblk - Read a raw VBLK object into a vblk structure
1117 * @buf: Block of data being worked on
1118 * @len: Size of the block of data
1119 * @vb: In-memory vblk in which to return information
1120 *
1121 * Read a raw VBLK object into a vblk structure. This function just reads the
1122 * information common to all VBLK types, then delegates the rest of the work to
1123 * helper functions: ldm_parse_*.
1124 *
Richard Knutsson130c6b92006-09-30 23:27:15 -07001125 * Return: 'true' @vb contains a VBLK
1126 * 'false' @vb contents are not defined
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 */
Richard Knutsson130c6b92006-09-30 23:27:15 -07001128static bool ldm_parse_vblk (const u8 *buf, int len, struct vblk *vb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129{
Richard Knutsson130c6b92006-09-30 23:27:15 -07001130 bool result = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 int r_objid;
1132
1133 BUG_ON (!buf || !vb);
1134
1135 r_objid = ldm_relative (buf, len, 0x18, 0);
1136 if (r_objid < 0) {
1137 ldm_error ("VBLK header is corrupt.");
Richard Knutsson130c6b92006-09-30 23:27:15 -07001138 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 }
1140
1141 vb->flags = buf[0x12];
1142 vb->type = buf[0x13];
1143 vb->obj_id = ldm_get_vnum (buf + 0x18);
1144 ldm_get_vstr (buf+0x18+r_objid, vb->name, sizeof (vb->name));
1145
1146 switch (vb->type) {
1147 case VBLK_CMP3: result = ldm_parse_cmp3 (buf, len, vb); break;
1148 case VBLK_DSK3: result = ldm_parse_dsk3 (buf, len, vb); break;
1149 case VBLK_DSK4: result = ldm_parse_dsk4 (buf, len, vb); break;
1150 case VBLK_DGR3: result = ldm_parse_dgr3 (buf, len, vb); break;
1151 case VBLK_DGR4: result = ldm_parse_dgr4 (buf, len, vb); break;
1152 case VBLK_PRT3: result = ldm_parse_prt3 (buf, len, vb); break;
1153 case VBLK_VOL5: result = ldm_parse_vol5 (buf, len, vb); break;
1154 }
1155
1156 if (result)
1157 ldm_debug ("Parsed VBLK 0x%llx (type: 0x%02x) ok.",
1158 (unsigned long long) vb->obj_id, vb->type);
1159 else
1160 ldm_error ("Failed to parse VBLK 0x%llx (type: 0x%02x).",
1161 (unsigned long long) vb->obj_id, vb->type);
1162
1163 return result;
1164}
1165
1166
1167/**
1168 * ldm_ldmdb_add - Adds a raw VBLK entry to the ldmdb database
1169 * @data: Raw VBLK to add to the database
1170 * @len: Size of the raw VBLK
1171 * @ldb: Cache of the database structures
1172 *
1173 * The VBLKs are sorted into categories. Partitions are also sorted by offset.
1174 *
1175 * N.B. This function does not check the validity of the VBLKs.
1176 *
Richard Knutsson130c6b92006-09-30 23:27:15 -07001177 * Return: 'true' The VBLK was added
1178 * 'false' An error occurred
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 */
Richard Knutsson130c6b92006-09-30 23:27:15 -07001180static bool ldm_ldmdb_add (u8 *data, int len, struct ldmdb *ldb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181{
1182 struct vblk *vb;
1183 struct list_head *item;
1184
1185 BUG_ON (!data || !ldb);
1186
1187 vb = kmalloc (sizeof (*vb), GFP_KERNEL);
1188 if (!vb) {
1189 ldm_crit ("Out of memory.");
Richard Knutsson130c6b92006-09-30 23:27:15 -07001190 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 }
1192
1193 if (!ldm_parse_vblk (data, len, vb)) {
1194 kfree(vb);
Richard Knutsson130c6b92006-09-30 23:27:15 -07001195 return false; /* Already logged */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 }
1197
1198 /* Put vblk into the correct list. */
1199 switch (vb->type) {
1200 case VBLK_DGR3:
1201 case VBLK_DGR4:
1202 list_add (&vb->list, &ldb->v_dgrp);
1203 break;
1204 case VBLK_DSK3:
1205 case VBLK_DSK4:
1206 list_add (&vb->list, &ldb->v_disk);
1207 break;
1208 case VBLK_VOL5:
1209 list_add (&vb->list, &ldb->v_volu);
1210 break;
1211 case VBLK_CMP3:
1212 list_add (&vb->list, &ldb->v_comp);
1213 break;
1214 case VBLK_PRT3:
1215 /* Sort by the partition's start sector. */
1216 list_for_each (item, &ldb->v_part) {
1217 struct vblk *v = list_entry (item, struct vblk, list);
1218 if ((v->vblk.part.disk_id == vb->vblk.part.disk_id) &&
1219 (v->vblk.part.start > vb->vblk.part.start)) {
1220 list_add_tail (&vb->list, &v->list);
Richard Knutsson130c6b92006-09-30 23:27:15 -07001221 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 }
1223 }
1224 list_add_tail (&vb->list, &ldb->v_part);
1225 break;
1226 }
Richard Knutsson130c6b92006-09-30 23:27:15 -07001227 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228}
1229
1230/**
1231 * ldm_frag_add - Add a VBLK fragment to a list
1232 * @data: Raw fragment to be added to the list
1233 * @size: Size of the raw fragment
1234 * @frags: Linked list of VBLK fragments
1235 *
1236 * Fragmented VBLKs may not be consecutive in the database, so they are placed
1237 * in a list so they can be pieced together later.
1238 *
Richard Knutsson130c6b92006-09-30 23:27:15 -07001239 * Return: 'true' Success, the VBLK was added to the list
1240 * 'false' Error, a problem occurred
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 */
Richard Knutsson130c6b92006-09-30 23:27:15 -07001242static bool ldm_frag_add (const u8 *data, int size, struct list_head *frags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243{
1244 struct frag *f;
1245 struct list_head *item;
1246 int rec, num, group;
1247
1248 BUG_ON (!data || !frags);
1249
1250 group = BE32 (data + 0x08);
1251 rec = BE16 (data + 0x0C);
1252 num = BE16 (data + 0x0E);
1253 if ((num < 1) || (num > 4)) {
1254 ldm_error ("A VBLK claims to have %d parts.", num);
Richard Knutsson130c6b92006-09-30 23:27:15 -07001255 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 }
1257
1258 list_for_each (item, frags) {
1259 f = list_entry (item, struct frag, list);
1260 if (f->group == group)
1261 goto found;
1262 }
1263
1264 f = kmalloc (sizeof (*f) + size*num, GFP_KERNEL);
1265 if (!f) {
1266 ldm_crit ("Out of memory.");
Richard Knutsson130c6b92006-09-30 23:27:15 -07001267 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 }
1269
1270 f->group = group;
1271 f->num = num;
1272 f->rec = rec;
1273 f->map = 0xFF << num;
1274
1275 list_add_tail (&f->list, frags);
1276found:
1277 if (f->map & (1 << rec)) {
1278 ldm_error ("Duplicate VBLK, part %d.", rec);
1279 f->map &= 0x7F; /* Mark the group as broken */
Richard Knutsson130c6b92006-09-30 23:27:15 -07001280 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 }
1282
1283 f->map |= (1 << rec);
1284
1285 if (num > 0) {
1286 data += VBLK_SIZE_HEAD;
1287 size -= VBLK_SIZE_HEAD;
1288 }
1289 memcpy (f->data+rec*(size-VBLK_SIZE_HEAD)+VBLK_SIZE_HEAD, data, size);
1290
Richard Knutsson130c6b92006-09-30 23:27:15 -07001291 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292}
1293
1294/**
1295 * ldm_frag_free - Free a linked list of VBLK fragments
1296 * @list: Linked list of fragments
1297 *
1298 * Free a linked list of VBLK fragments
1299 *
1300 * Return: none
1301 */
1302static void ldm_frag_free (struct list_head *list)
1303{
1304 struct list_head *item, *tmp;
1305
1306 BUG_ON (!list);
1307
1308 list_for_each_safe (item, tmp, list)
1309 kfree (list_entry (item, struct frag, list));
1310}
1311
1312/**
1313 * ldm_frag_commit - Validate fragmented VBLKs and add them to the database
1314 * @frags: Linked list of VBLK fragments
1315 * @ldb: Cache of the database structures
1316 *
1317 * Now that all the fragmented VBLKs have been collected, they must be added to
1318 * the database for later use.
1319 *
Richard Knutsson130c6b92006-09-30 23:27:15 -07001320 * Return: 'true' All the fragments we added successfully
1321 * 'false' One or more of the fragments we invalid
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 */
Richard Knutsson130c6b92006-09-30 23:27:15 -07001323static bool ldm_frag_commit (struct list_head *frags, struct ldmdb *ldb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324{
1325 struct frag *f;
1326 struct list_head *item;
1327
1328 BUG_ON (!frags || !ldb);
1329
1330 list_for_each (item, frags) {
1331 f = list_entry (item, struct frag, list);
1332
1333 if (f->map != 0xFF) {
1334 ldm_error ("VBLK group %d is incomplete (0x%02x).",
1335 f->group, f->map);
Richard Knutsson130c6b92006-09-30 23:27:15 -07001336 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 }
1338
1339 if (!ldm_ldmdb_add (f->data, f->num*ldb->vm.vblk_size, ldb))
Richard Knutsson130c6b92006-09-30 23:27:15 -07001340 return false; /* Already logged */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 }
Richard Knutsson130c6b92006-09-30 23:27:15 -07001342 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343}
1344
1345/**
1346 * ldm_get_vblks - Read the on-disk database of VBLKs into memory
1347 * @bdev: Device holding the LDM Database
1348 * @base: Offset, into @bdev, of the database
1349 * @ldb: Cache of the database structures
1350 *
1351 * To use the information from the VBLKs, they need to be read from the disk,
1352 * unpacked and validated. We cache them in @ldb according to their type.
1353 *
Richard Knutsson130c6b92006-09-30 23:27:15 -07001354 * Return: 'true' All the VBLKs were read successfully
1355 * 'false' An error occurred
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 */
Richard Knutsson130c6b92006-09-30 23:27:15 -07001357static bool ldm_get_vblks (struct block_device *bdev, unsigned long base,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 struct ldmdb *ldb)
1359{
1360 int size, perbuf, skip, finish, s, v, recs;
1361 u8 *data = NULL;
1362 Sector sect;
Richard Knutsson130c6b92006-09-30 23:27:15 -07001363 bool result = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 LIST_HEAD (frags);
1365
1366 BUG_ON (!bdev || !ldb);
1367
1368 size = ldb->vm.vblk_size;
1369 perbuf = 512 / size;
1370 skip = ldb->vm.vblk_offset >> 9; /* Bytes to sectors */
1371 finish = (size * ldb->vm.last_vblk_seq) >> 9;
1372
1373 for (s = skip; s < finish; s++) { /* For each sector */
1374 data = read_dev_sector (bdev, base + OFF_VMDB + s, &sect);
1375 if (!data) {
1376 ldm_crit ("Disk read failed.");
1377 goto out;
1378 }
1379
1380 for (v = 0; v < perbuf; v++, data+=size) { /* For each vblk */
1381 if (MAGIC_VBLK != BE32 (data)) {
1382 ldm_error ("Expected to find a VBLK.");
1383 goto out;
1384 }
1385
1386 recs = BE16 (data + 0x0E); /* Number of records */
1387 if (recs == 1) {
1388 if (!ldm_ldmdb_add (data, size, ldb))
1389 goto out; /* Already logged */
1390 } else if (recs > 1) {
1391 if (!ldm_frag_add (data, size, &frags))
1392 goto out; /* Already logged */
1393 }
1394 /* else Record is not in use, ignore it. */
1395 }
1396 put_dev_sector (sect);
1397 data = NULL;
1398 }
1399
1400 result = ldm_frag_commit (&frags, ldb); /* Failures, already logged */
1401out:
1402 if (data)
1403 put_dev_sector (sect);
1404 ldm_frag_free (&frags);
1405
1406 return result;
1407}
1408
1409/**
1410 * ldm_free_vblks - Free a linked list of vblk's
1411 * @lh: Head of a linked list of struct vblk
1412 *
1413 * Free a list of vblk's and free the memory used to maintain the list.
1414 *
1415 * Return: none
1416 */
1417static void ldm_free_vblks (struct list_head *lh)
1418{
1419 struct list_head *item, *tmp;
1420
1421 BUG_ON (!lh);
1422
1423 list_for_each_safe (item, tmp, lh)
1424 kfree (list_entry (item, struct vblk, list));
1425}
1426
1427
1428/**
1429 * ldm_partition - Find out whether a device is a dynamic disk and handle it
1430 * @pp: List of the partitions parsed so far
1431 * @bdev: Device holding the LDM Database
1432 *
1433 * This determines whether the device @bdev is a dynamic disk and if so creates
1434 * the partitions necessary in the gendisk structure pointed to by @hd.
1435 *
1436 * We create a dummy device 1, which contains the LDM database, and then create
1437 * each partition described by the LDM database in sequence as devices 2+. For
1438 * example, if the device is hda, we would have: hda1: LDM database, hda2, hda3,
1439 * and so on: the actual data containing partitions.
1440 *
1441 * Return: 1 Success, @bdev is a dynamic disk and we handled it
1442 * 0 Success, @bdev is not a dynamic disk
1443 * -1 An error occurred before enough information had been read
1444 * Or @bdev is a dynamic disk, but it may be corrupted
1445 */
1446int ldm_partition (struct parsed_partitions *pp, struct block_device *bdev)
1447{
1448 struct ldmdb *ldb;
1449 unsigned long base;
1450 int result = -1;
1451
1452 BUG_ON (!pp || !bdev);
1453
1454 /* Look for signs of a Dynamic Disk */
1455 if (!ldm_validate_partition_table (bdev))
1456 return 0;
1457
1458 ldb = kmalloc (sizeof (*ldb), GFP_KERNEL);
1459 if (!ldb) {
1460 ldm_crit ("Out of memory.");
1461 goto out;
1462 }
1463
1464 /* Parse and check privheads. */
1465 if (!ldm_validate_privheads (bdev, &ldb->ph))
1466 goto out; /* Already logged */
1467
1468 /* All further references are relative to base (database start). */
1469 base = ldb->ph.config_start;
1470
1471 /* Parse and check tocs and vmdb. */
1472 if (!ldm_validate_tocblocks (bdev, base, ldb) ||
1473 !ldm_validate_vmdb (bdev, base, ldb))
1474 goto out; /* Already logged */
1475
1476 /* Initialize vblk lists in ldmdb struct */
1477 INIT_LIST_HEAD (&ldb->v_dgrp);
1478 INIT_LIST_HEAD (&ldb->v_disk);
1479 INIT_LIST_HEAD (&ldb->v_volu);
1480 INIT_LIST_HEAD (&ldb->v_comp);
1481 INIT_LIST_HEAD (&ldb->v_part);
1482
1483 if (!ldm_get_vblks (bdev, base, ldb)) {
1484 ldm_crit ("Failed to read the VBLKs from the database.");
1485 goto cleanup;
1486 }
1487
1488 /* Finally, create the data partition devices. */
1489 if (ldm_create_data_partitions (pp, ldb)) {
1490 ldm_debug ("Parsed LDM database successfully.");
1491 result = 1;
1492 }
1493 /* else Already logged */
1494
1495cleanup:
1496 ldm_free_vblks (&ldb->v_dgrp);
1497 ldm_free_vblks (&ldb->v_disk);
1498 ldm_free_vblks (&ldb->v_volu);
1499 ldm_free_vblks (&ldb->v_comp);
1500 ldm_free_vblks (&ldb->v_part);
1501out:
1502 kfree (ldb);
1503 return result;
1504}