Blame view
block/partitions/ldm.c
44 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 |
/** * ldm - Support for Windows Logical Disk Manager (Dynamic Disks) * * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org> |
dde33348e LDM: Fix for Wind... |
5 |
* Copyright (c) 2001-2007 Anton Altaparmakov |
1da177e4c Linux-2.6.12-rc2 |
6 7 |
* Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com> * |
631dd1a88 Update broken web... |
8 |
* Documentation is available at http://www.linux-ntfs.org/doku.php?id=downloads |
1da177e4c Linux-2.6.12-rc2 |
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
* * This program is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License as published by the Free Software * Foundation; either version 2 of the License, or (at your option) any later * version. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License along with * this program (in the main directory of the source in the file COPYING); if * not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307 USA */ #include <linux/slab.h> #include <linux/pagemap.h> #include <linux/stringify.h> |
91f06e668 fs: ldm: don't us... |
29 |
#include <linux/kernel.h> |
1da177e4c Linux-2.6.12-rc2 |
30 31 32 |
#include "ldm.h" #include "check.h" #include "msdos.h" |
1da177e4c Linux-2.6.12-rc2 |
33 34 35 36 37 38 39 40 41 42 43 |
/** * ldm_debug/info/error/crit - Output an error message * @f: A printf format string containing the message * @...: Variables to substitute into @f * * ldm_debug() writes a DEBUG level message to the syslog but only if the * driver was compiled with debug enabled. Otherwise, the call turns into a NOP. */ #ifndef CONFIG_LDM_DEBUG #define ldm_debug(...) do {} while (0) #else |
8e24eea72 fs: replace remai... |
44 |
#define ldm_debug(f, a...) _ldm_printk (KERN_DEBUG, __func__, f, ##a) |
1da177e4c Linux-2.6.12-rc2 |
45 |
#endif |
8e24eea72 fs: replace remai... |
46 47 48 |
#define ldm_crit(f, a...) _ldm_printk (KERN_CRIT, __func__, f, ##a) #define ldm_error(f, a...) _ldm_printk (KERN_ERR, __func__, f, ##a) #define ldm_info(f, a...) _ldm_printk (KERN_INFO, __func__, f, ##a) |
1da177e4c Linux-2.6.12-rc2 |
49 |
|
b9075fa96 treewide: use __p... |
50 51 |
static __printf(3, 4) void _ldm_printk(const char *level, const char *function, const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
52 |
{ |
b9075fa96 treewide: use __p... |
53 |
struct va_format vaf; |
1da177e4c Linux-2.6.12-rc2 |
54 55 56 |
va_list args; va_start (args, fmt); |
1da177e4c Linux-2.6.12-rc2 |
57 |
|
b9075fa96 treewide: use __p... |
58 59 60 61 62 63 64 |
vaf.fmt = fmt; vaf.va = &args; printk("%s%s(): %pV ", level, function, &vaf); va_end(args); |
1da177e4c Linux-2.6.12-rc2 |
65 |
} |
1da177e4c Linux-2.6.12-rc2 |
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 |
/** * ldm_parse_hexbyte - Convert a ASCII hex number to a byte * @src: Pointer to at least 2 characters to convert. * * Convert a two character ASCII hex string to a number. * * Return: 0-255 Success, the byte was parsed correctly * -1 Error, an invalid character was supplied */ static int ldm_parse_hexbyte (const u8 *src) { unsigned int x; /* For correct wrapping */ int h; /* high part */ |
91f06e668 fs: ldm: don't us... |
81 82 83 |
x = h = hex_to_bin(src[0]); if (h < 0) return -1; |
1da177e4c Linux-2.6.12-rc2 |
84 85 |
/* low part */ |
91f06e668 fs: ldm: don't us... |
86 87 88 89 90 |
h = hex_to_bin(src[1]); if (h < 0) return -1; return (x << 4) + h; |
1da177e4c Linux-2.6.12-rc2 |
91 92 93 94 95 96 97 98 99 |
} /** * ldm_parse_guid - Convert GUID from ASCII to binary * @src: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba * @dest: Memory block to hold binary GUID (16 bytes) * * N.B. The GUID need not be NULL terminated. * |
130c6b989 [PATCH] fs/partit... |
100 101 |
* Return: 'true' @dest contains binary GUID * 'false' @dest contents are undefined |
1da177e4c Linux-2.6.12-rc2 |
102 |
*/ |
130c6b989 [PATCH] fs/partit... |
103 |
static bool ldm_parse_guid (const u8 *src, u8 *dest) |
1da177e4c Linux-2.6.12-rc2 |
104 105 106 107 108 109 |
{ static const int size[] = { 4, 2, 2, 2, 6 }; int i, j, v; if (src[8] != '-' || src[13] != '-' || src[18] != '-' || src[23] != '-') |
130c6b989 [PATCH] fs/partit... |
110 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
111 112 113 114 |
for (j = 0; j < 5; j++, src++) for (i = 0; i < size[j]; i++, src+=2, *dest++ = v) if ((v = ldm_parse_hexbyte (src)) < 0) |
130c6b989 [PATCH] fs/partit... |
115 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
116 |
|
130c6b989 [PATCH] fs/partit... |
117 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
118 |
} |
1da177e4c Linux-2.6.12-rc2 |
119 120 121 122 123 124 125 126 |
/** * ldm_parse_privhead - Read the LDM Database PRIVHEAD structure * @data: Raw database PRIVHEAD structure loaded from the device * @ph: In-memory privhead structure in which to return parsed information * * This parses the LDM database PRIVHEAD structure supplied in @data and * sets up the in-memory privhead structure @ph with the obtained information. * |
130c6b989 [PATCH] fs/partit... |
127 128 |
* Return: 'true' @ph contains the PRIVHEAD data * 'false' @ph contents are undefined |
1da177e4c Linux-2.6.12-rc2 |
129 |
*/ |
dde33348e LDM: Fix for Wind... |
130 |
static bool ldm_parse_privhead(const u8 *data, struct privhead *ph) |
1da177e4c Linux-2.6.12-rc2 |
131 |
{ |
dde33348e LDM: Fix for Wind... |
132 |
bool is_vista = false; |
1da177e4c Linux-2.6.12-rc2 |
133 |
|
dde33348e LDM: Fix for Wind... |
134 |
BUG_ON(!data || !ph); |
b7bbf8fa6 fs: ldm.[ch] use ... |
135 |
if (MAGIC_PRIVHEAD != get_unaligned_be64(data)) { |
dde33348e LDM: Fix for Wind... |
136 |
ldm_error("Cannot find PRIVHEAD structure. LDM database is" |
1da177e4c Linux-2.6.12-rc2 |
137 |
" corrupt. Aborting."); |
130c6b989 [PATCH] fs/partit... |
138 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
139 |
} |
b7bbf8fa6 fs: ldm.[ch] use ... |
140 141 142 143 144 145 |
ph->ver_major = get_unaligned_be16(data + 0x000C); ph->ver_minor = get_unaligned_be16(data + 0x000E); ph->logical_disk_start = get_unaligned_be64(data + 0x011B); ph->logical_disk_size = get_unaligned_be64(data + 0x0123); ph->config_start = get_unaligned_be64(data + 0x012B); ph->config_size = get_unaligned_be64(data + 0x0133); |
dde33348e LDM: Fix for Wind... |
146 147 148 149 150 151 |
/* Version 2.11 is Win2k/XP and version 2.12 is Vista. */ if (ph->ver_major == 2 && ph->ver_minor == 12) is_vista = true; if (!is_vista && (ph->ver_major != 2 || ph->ver_minor != 11)) { ldm_error("Expected PRIVHEAD version 2.11 or 2.12, got %d.%d." " Aborting.", ph->ver_major, ph->ver_minor); |
130c6b989 [PATCH] fs/partit... |
152 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
153 |
} |
dde33348e LDM: Fix for Wind... |
154 155 |
ldm_debug("PRIVHEAD version %d.%d (Windows %s).", ph->ver_major, ph->ver_minor, is_vista ? "Vista" : "2000/XP"); |
1da177e4c Linux-2.6.12-rc2 |
156 |
if (ph->config_size != LDM_DB_SIZE) { /* 1 MiB in sectors. */ |
dde33348e LDM: Fix for Wind... |
157 158 |
/* Warn the user and continue, carefully. */ ldm_info("Database is normally %u bytes, it claims to " |
1da177e4c Linux-2.6.12-rc2 |
159 |
"be %llu bytes.", LDM_DB_SIZE, |
72dd9ca59 partitions/LDM: b... |
160 |
(unsigned long long)ph->config_size); |
1da177e4c Linux-2.6.12-rc2 |
161 |
} |
dde33348e LDM: Fix for Wind... |
162 163 164 |
if ((ph->logical_disk_size == 0) || (ph->logical_disk_start + ph->logical_disk_size > ph->config_start)) { ldm_error("PRIVHEAD disk size doesn't match real disk size"); |
130c6b989 [PATCH] fs/partit... |
165 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
166 |
} |
dde33348e LDM: Fix for Wind... |
167 168 |
if (!ldm_parse_guid(data + 0x0030, ph->disk_id)) { ldm_error("PRIVHEAD contains an invalid GUID."); |
130c6b989 [PATCH] fs/partit... |
169 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
170 |
} |
dde33348e LDM: Fix for Wind... |
171 |
ldm_debug("Parsed PRIVHEAD successfully."); |
130c6b989 [PATCH] fs/partit... |
172 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
173 174 175 176 177 178 179 180 181 182 183 184 185 |
} /** * ldm_parse_tocblock - Read the LDM Database TOCBLOCK structure * @data: Raw database TOCBLOCK structure loaded from the device * @toc: In-memory toc structure in which to return parsed information * * This parses the LDM Database TOCBLOCK (table of contents) structure supplied * in @data and sets up the in-memory tocblock structure @toc with the obtained * information. * * N.B. The *_start and *_size values returned in @toc are not range-checked. * |
130c6b989 [PATCH] fs/partit... |
186 187 |
* Return: 'true' @toc contains the TOCBLOCK data * 'false' @toc contents are undefined |
1da177e4c Linux-2.6.12-rc2 |
188 |
*/ |
130c6b989 [PATCH] fs/partit... |
189 |
static bool ldm_parse_tocblock (const u8 *data, struct tocblock *toc) |
1da177e4c Linux-2.6.12-rc2 |
190 191 |
{ BUG_ON (!data || !toc); |
b7bbf8fa6 fs: ldm.[ch] use ... |
192 |
if (MAGIC_TOCBLOCK != get_unaligned_be64(data)) { |
1da177e4c Linux-2.6.12-rc2 |
193 |
ldm_crit ("Cannot find TOCBLOCK, database may be corrupt."); |
130c6b989 [PATCH] fs/partit... |
194 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
195 196 197 |
} strncpy (toc->bitmap1_name, data + 0x24, sizeof (toc->bitmap1_name)); toc->bitmap1_name[sizeof (toc->bitmap1_name) - 1] = 0; |
b7bbf8fa6 fs: ldm.[ch] use ... |
198 199 |
toc->bitmap1_start = get_unaligned_be64(data + 0x2E); toc->bitmap1_size = get_unaligned_be64(data + 0x36); |
1da177e4c Linux-2.6.12-rc2 |
200 201 202 203 204 |
if (strncmp (toc->bitmap1_name, TOC_BITMAP1, sizeof (toc->bitmap1_name)) != 0) { ldm_crit ("TOCBLOCK's first bitmap is '%s', should be '%s'.", TOC_BITMAP1, toc->bitmap1_name); |
130c6b989 [PATCH] fs/partit... |
205 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
206 207 208 |
} strncpy (toc->bitmap2_name, data + 0x46, sizeof (toc->bitmap2_name)); toc->bitmap2_name[sizeof (toc->bitmap2_name) - 1] = 0; |
b7bbf8fa6 fs: ldm.[ch] use ... |
209 210 |
toc->bitmap2_start = get_unaligned_be64(data + 0x50); toc->bitmap2_size = get_unaligned_be64(data + 0x58); |
1da177e4c Linux-2.6.12-rc2 |
211 212 213 214 |
if (strncmp (toc->bitmap2_name, TOC_BITMAP2, sizeof (toc->bitmap2_name)) != 0) { ldm_crit ("TOCBLOCK's second bitmap is '%s', should be '%s'.", TOC_BITMAP2, toc->bitmap2_name); |
130c6b989 [PATCH] fs/partit... |
215 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
216 217 |
} ldm_debug ("Parsed TOCBLOCK successfully."); |
130c6b989 [PATCH] fs/partit... |
218 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
219 220 221 222 223 224 225 226 227 228 229 230 |
} /** * ldm_parse_vmdb - Read the LDM Database VMDB structure * @data: Raw database VMDB structure loaded from the device * @vm: In-memory vmdb structure in which to return parsed information * * This parses the LDM Database VMDB structure supplied in @data and sets up * the in-memory vmdb structure @vm with the obtained information. * * N.B. The *_start, *_size and *_seq values will be range-checked later. * |
130c6b989 [PATCH] fs/partit... |
231 232 |
* Return: 'true' @vm contains VMDB info * 'false' @vm contents are undefined |
1da177e4c Linux-2.6.12-rc2 |
233 |
*/ |
130c6b989 [PATCH] fs/partit... |
234 |
static bool ldm_parse_vmdb (const u8 *data, struct vmdb *vm) |
1da177e4c Linux-2.6.12-rc2 |
235 236 |
{ BUG_ON (!data || !vm); |
b7bbf8fa6 fs: ldm.[ch] use ... |
237 |
if (MAGIC_VMDB != get_unaligned_be32(data)) { |
1da177e4c Linux-2.6.12-rc2 |
238 |
ldm_crit ("Cannot find the VMDB, database may be corrupt."); |
130c6b989 [PATCH] fs/partit... |
239 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
240 |
} |
b7bbf8fa6 fs: ldm.[ch] use ... |
241 242 |
vm->ver_major = get_unaligned_be16(data + 0x12); vm->ver_minor = get_unaligned_be16(data + 0x14); |
1da177e4c Linux-2.6.12-rc2 |
243 244 245 |
if ((vm->ver_major != 4) || (vm->ver_minor != 10)) { ldm_error ("Expected VMDB version %d.%d, got %d.%d. " "Aborting.", 4, 10, vm->ver_major, vm->ver_minor); |
130c6b989 [PATCH] fs/partit... |
246 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
247 |
} |
b7bbf8fa6 fs: ldm.[ch] use ... |
248 |
vm->vblk_size = get_unaligned_be32(data + 0x08); |
294f6cf48 ldm: corrupted pa... |
249 250 251 252 |
if (vm->vblk_size == 0) { ldm_error ("Illegal VBLK size"); return false; } |
b7bbf8fa6 fs: ldm.[ch] use ... |
253 254 |
vm->vblk_offset = get_unaligned_be32(data + 0x0C); vm->last_vblk_seq = get_unaligned_be32(data + 0x04); |
1da177e4c Linux-2.6.12-rc2 |
255 256 |
ldm_debug ("Parsed VMDB successfully."); |
130c6b989 [PATCH] fs/partit... |
257 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
258 259 260 261 262 263 264 265 266 |
} /** * ldm_compare_privheads - Compare two privhead objects * @ph1: First privhead * @ph2: Second privhead * * This compares the two privhead structures @ph1 and @ph2. * |
130c6b989 [PATCH] fs/partit... |
267 268 |
* Return: 'true' Identical * 'false' Different |
1da177e4c Linux-2.6.12-rc2 |
269 |
*/ |
130c6b989 [PATCH] fs/partit... |
270 |
static bool ldm_compare_privheads (const struct privhead *ph1, |
1da177e4c Linux-2.6.12-rc2 |
271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 |
const struct privhead *ph2) { BUG_ON (!ph1 || !ph2); return ((ph1->ver_major == ph2->ver_major) && (ph1->ver_minor == ph2->ver_minor) && (ph1->logical_disk_start == ph2->logical_disk_start) && (ph1->logical_disk_size == ph2->logical_disk_size) && (ph1->config_start == ph2->config_start) && (ph1->config_size == ph2->config_size) && !memcmp (ph1->disk_id, ph2->disk_id, GUID_SIZE)); } /** * ldm_compare_tocblocks - Compare two tocblock objects * @toc1: First toc * @toc2: Second toc * * This compares the two tocblock structures @toc1 and @toc2. * |
130c6b989 [PATCH] fs/partit... |
291 292 |
* Return: 'true' Identical * 'false' Different |
1da177e4c Linux-2.6.12-rc2 |
293 |
*/ |
130c6b989 [PATCH] fs/partit... |
294 |
static bool ldm_compare_tocblocks (const struct tocblock *toc1, |
1da177e4c Linux-2.6.12-rc2 |
295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 |
const struct tocblock *toc2) { BUG_ON (!toc1 || !toc2); return ((toc1->bitmap1_start == toc2->bitmap1_start) && (toc1->bitmap1_size == toc2->bitmap1_size) && (toc1->bitmap2_start == toc2->bitmap2_start) && (toc1->bitmap2_size == toc2->bitmap2_size) && !strncmp (toc1->bitmap1_name, toc2->bitmap1_name, sizeof (toc1->bitmap1_name)) && !strncmp (toc1->bitmap2_name, toc2->bitmap2_name, sizeof (toc1->bitmap2_name))); } /** * ldm_validate_privheads - Compare the primary privhead with its backups |
1493bf217 block: use struct... |
311 |
* @state: Partition check state including device holding the LDM Database |
1da177e4c Linux-2.6.12-rc2 |
312 313 314 315 316 317 318 319 |
* @ph1: Memory struct to fill with ph contents * * Read and compare all three privheads from disk. * * The privheads on disk show the size and location of the main disk area and * the configuration area (the database). The values are range-checked against * @hd, which contains the real size of the disk. * |
130c6b989 [PATCH] fs/partit... |
320 321 |
* Return: 'true' Success * 'false' Error |
1da177e4c Linux-2.6.12-rc2 |
322 |
*/ |
1493bf217 block: use struct... |
323 324 |
static bool ldm_validate_privheads(struct parsed_partitions *state, struct privhead *ph1) |
1da177e4c Linux-2.6.12-rc2 |
325 326 327 328 329 |
{ static const int off[3] = { OFF_PRIV1, OFF_PRIV2, OFF_PRIV3 }; struct privhead *ph[3] = { ph1 }; Sector sect; u8 *data; |
130c6b989 [PATCH] fs/partit... |
330 |
bool result = false; |
1da177e4c Linux-2.6.12-rc2 |
331 332 |
long num_sects; int i; |
1493bf217 block: use struct... |
333 |
BUG_ON (!state || !ph1); |
1da177e4c Linux-2.6.12-rc2 |
334 335 336 337 338 339 340 341 342 343 344 345 346 |
ph[1] = kmalloc (sizeof (*ph[1]), GFP_KERNEL); ph[2] = kmalloc (sizeof (*ph[2]), GFP_KERNEL); if (!ph[1] || !ph[2]) { ldm_crit ("Out of memory."); goto out; } /* off[1 & 2] are relative to ph[0]->config_start */ ph[0]->config_start = 0; /* Read and parse privheads */ for (i = 0; i < 3; i++) { |
1493bf217 block: use struct... |
347 348 |
data = read_part_sector(state, ph[0]->config_start + off[i], §); |
1da177e4c Linux-2.6.12-rc2 |
349 350 351 352 353 354 355 356 357 358 359 360 361 362 |
if (!data) { ldm_crit ("Disk read failed."); goto out; } result = ldm_parse_privhead (data, ph[i]); put_dev_sector (sect); if (!result) { ldm_error ("Cannot find PRIVHEAD %d.", i+1); /* Log again */ if (i < 2) goto out; /* Already logged */ else break; /* FIXME ignore for now, 3rd PH can fail on odd-sized disks */ } } |
1493bf217 block: use struct... |
363 |
num_sects = state->bdev->bd_inode->i_size >> 9; |
1da177e4c Linux-2.6.12-rc2 |
364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 |
if ((ph[0]->config_start > num_sects) || ((ph[0]->config_start + ph[0]->config_size) > num_sects)) { ldm_crit ("Database extends beyond the end of the disk."); goto out; } if ((ph[0]->logical_disk_start > ph[0]->config_start) || ((ph[0]->logical_disk_start + ph[0]->logical_disk_size) > ph[0]->config_start)) { ldm_crit ("Disk and database overlap."); goto out; } if (!ldm_compare_privheads (ph[0], ph[1])) { ldm_crit ("Primary and backup PRIVHEADs don't match."); goto out; } /* FIXME ignore this for now if (!ldm_compare_privheads (ph[0], ph[2])) { ldm_crit ("Primary and backup PRIVHEADs don't match."); goto out; }*/ ldm_debug ("Validated PRIVHEADs successfully."); |
130c6b989 [PATCH] fs/partit... |
388 |
result = true; |
1da177e4c Linux-2.6.12-rc2 |
389 390 391 392 393 394 395 396 |
out: kfree (ph[1]); kfree (ph[2]); return result; } /** * ldm_validate_tocblocks - Validate the table of contents and its backups |
1493bf217 block: use struct... |
397 398 |
* @state: Partition check state including device holding the LDM Database * @base: Offset, into @state->bdev, of the database |
1da177e4c Linux-2.6.12-rc2 |
399 400 401 |
* @ldb: Cache of the database structures * * Find and compare the four tables of contents of the LDM Database stored on |
1493bf217 block: use struct... |
402 |
* @state->bdev and return the parsed information into @toc1. |
1da177e4c Linux-2.6.12-rc2 |
403 404 405 |
* * The offsets and sizes of the configs are range-checked against a privhead. * |
130c6b989 [PATCH] fs/partit... |
406 407 |
* Return: 'true' @toc1 contains validated TOCBLOCK info * 'false' @toc1 contents are undefined |
1da177e4c Linux-2.6.12-rc2 |
408 |
*/ |
1493bf217 block: use struct... |
409 410 |
static bool ldm_validate_tocblocks(struct parsed_partitions *state, unsigned long base, struct ldmdb *ldb) |
1da177e4c Linux-2.6.12-rc2 |
411 412 413 414 415 416 |
{ static const int off[4] = { OFF_TOCB1, OFF_TOCB2, OFF_TOCB3, OFF_TOCB4}; struct tocblock *tb[4]; struct privhead *ph; Sector sect; u8 *data; |
dde33348e LDM: Fix for Wind... |
417 |
int i, nr_tbs; |
130c6b989 [PATCH] fs/partit... |
418 |
bool result = false; |
1da177e4c Linux-2.6.12-rc2 |
419 |
|
1493bf217 block: use struct... |
420 |
BUG_ON(!state || !ldb); |
dde33348e LDM: Fix for Wind... |
421 |
ph = &ldb->ph; |
1da177e4c Linux-2.6.12-rc2 |
422 |
tb[0] = &ldb->toc; |
dde33348e LDM: Fix for Wind... |
423 424 425 426 |
tb[1] = kmalloc(sizeof(*tb[1]) * 3, GFP_KERNEL); if (!tb[1]) { ldm_crit("Out of memory."); goto err; |
1da177e4c Linux-2.6.12-rc2 |
427 |
} |
dde33348e LDM: Fix for Wind... |
428 429 430 431 432 433 434 435 436 |
tb[2] = (struct tocblock*)((u8*)tb[1] + sizeof(*tb[1])); tb[3] = (struct tocblock*)((u8*)tb[2] + sizeof(*tb[2])); /* * Try to read and parse all four TOCBLOCKs. * * Windows Vista LDM v2.12 does not always have all four TOCBLOCKs so * skip any that fail as long as we get at least one valid TOCBLOCK. */ for (nr_tbs = i = 0; i < 4; i++) { |
1493bf217 block: use struct... |
437 |
data = read_part_sector(state, base + off[i], §); |
1da177e4c Linux-2.6.12-rc2 |
438 |
if (!data) { |
dde33348e LDM: Fix for Wind... |
439 440 |
ldm_error("Disk read failed for TOCBLOCK %d.", i); continue; |
1da177e4c Linux-2.6.12-rc2 |
441 |
} |
dde33348e LDM: Fix for Wind... |
442 443 444 |
if (ldm_parse_tocblock(data, tb[nr_tbs])) nr_tbs++; put_dev_sector(sect); |
1da177e4c Linux-2.6.12-rc2 |
445 |
} |
dde33348e LDM: Fix for Wind... |
446 447 448 449 450 |
if (!nr_tbs) { ldm_crit("Failed to find a valid TOCBLOCK."); goto err; } /* Range check the TOCBLOCK against a privhead. */ |
1da177e4c Linux-2.6.12-rc2 |
451 |
if (((tb[0]->bitmap1_start + tb[0]->bitmap1_size) > ph->config_size) || |
dde33348e LDM: Fix for Wind... |
452 453 454 455 |
((tb[0]->bitmap2_start + tb[0]->bitmap2_size) > ph->config_size)) { ldm_crit("The bitmaps are out of range. Giving up."); goto err; |
1da177e4c Linux-2.6.12-rc2 |
456 |
} |
dde33348e LDM: Fix for Wind... |
457 458 459 460 461 462 |
/* Compare all loaded TOCBLOCKs. */ for (i = 1; i < nr_tbs; i++) { if (!ldm_compare_tocblocks(tb[0], tb[i])) { ldm_crit("TOCBLOCKs 0 and %d do not match.", i); goto err; } |
1da177e4c Linux-2.6.12-rc2 |
463 |
} |
dde33348e LDM: Fix for Wind... |
464 |
ldm_debug("Validated %d TOCBLOCKs successfully.", nr_tbs); |
130c6b989 [PATCH] fs/partit... |
465 |
result = true; |
dde33348e LDM: Fix for Wind... |
466 467 |
err: kfree(tb[1]); |
1da177e4c Linux-2.6.12-rc2 |
468 469 470 471 472 |
return result; } /** * ldm_validate_vmdb - Read the VMDB and validate it |
1493bf217 block: use struct... |
473 |
* @state: Partition check state including device holding the LDM Database |
1da177e4c Linux-2.6.12-rc2 |
474 475 476 477 478 479 |
* @base: Offset, into @bdev, of the database * @ldb: Cache of the database structures * * Find the vmdb of the LDM Database stored on @bdev and return the parsed * information in @ldb. * |
130c6b989 [PATCH] fs/partit... |
480 481 |
* Return: 'true' @ldb contains validated VBDB info * 'false' @ldb contents are undefined |
1da177e4c Linux-2.6.12-rc2 |
482 |
*/ |
1493bf217 block: use struct... |
483 484 |
static bool ldm_validate_vmdb(struct parsed_partitions *state, unsigned long base, struct ldmdb *ldb) |
1da177e4c Linux-2.6.12-rc2 |
485 486 487 |
{ Sector sect; u8 *data; |
130c6b989 [PATCH] fs/partit... |
488 |
bool result = false; |
1da177e4c Linux-2.6.12-rc2 |
489 490 |
struct vmdb *vm; struct tocblock *toc; |
1493bf217 block: use struct... |
491 |
BUG_ON (!state || !ldb); |
1da177e4c Linux-2.6.12-rc2 |
492 493 494 |
vm = &ldb->vm; toc = &ldb->toc; |
1493bf217 block: use struct... |
495 |
data = read_part_sector(state, base + OFF_VMDB, §); |
1da177e4c Linux-2.6.12-rc2 |
496 497 |
if (!data) { ldm_crit ("Disk read failed."); |
130c6b989 [PATCH] fs/partit... |
498 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
499 500 501 502 503 504 |
} if (!ldm_parse_vmdb (data, vm)) goto out; /* Already logged */ /* Are there uncommitted transactions? */ |
b7bbf8fa6 fs: ldm.[ch] use ... |
505 |
if (get_unaligned_be16(data + 0x10) != 0x01) { |
1da177e4c Linux-2.6.12-rc2 |
506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 |
ldm_crit ("Database is not in a consistent state. Aborting."); goto out; } if (vm->vblk_offset != 512) ldm_info ("VBLKs start at offset 0x%04x.", vm->vblk_offset); /* * The last_vblkd_seq can be before the end of the vmdb, just make sure * it is not out of bounds. */ if ((vm->vblk_size * vm->last_vblk_seq) > (toc->bitmap1_size << 9)) { ldm_crit ("VMDB exceeds allowed size specified by TOCBLOCK. " "Database is corrupt. Aborting."); goto out; } |
130c6b989 [PATCH] fs/partit... |
522 |
result = true; |
1da177e4c Linux-2.6.12-rc2 |
523 524 525 526 527 528 529 530 |
out: put_dev_sector (sect); return result; } /** * ldm_validate_partition_table - Determine whether bdev might be a dynamic disk |
1493bf217 block: use struct... |
531 |
* @state: Partition check state including device holding the LDM Database |
1da177e4c Linux-2.6.12-rc2 |
532 533 534 535 536 537 |
* * This function provides a weak test to decide whether the device is a dynamic * disk or not. It looks for an MS-DOS-style partition table containing at * least one partition of type 0x42 (formerly SFS, now used by Windows for * dynamic disks). * |
1493bf217 block: use struct... |
538 |
* N.B. The only possible error can come from the read_part_sector and that is |
1da177e4c Linux-2.6.12-rc2 |
539 540 541 |
* only likely to happen if the underlying device is strange. If that IS * the case we should return zero to let someone else try. * |
1493bf217 block: use struct... |
542 543 |
* Return: 'true' @state->bdev is a dynamic disk * 'false' @state->bdev is not a dynamic disk, or an error occurred |
1da177e4c Linux-2.6.12-rc2 |
544 |
*/ |
1493bf217 block: use struct... |
545 |
static bool ldm_validate_partition_table(struct parsed_partitions *state) |
1da177e4c Linux-2.6.12-rc2 |
546 547 548 549 550 |
{ Sector sect; u8 *data; struct partition *p; int i; |
130c6b989 [PATCH] fs/partit... |
551 |
bool result = false; |
1da177e4c Linux-2.6.12-rc2 |
552 |
|
1493bf217 block: use struct... |
553 |
BUG_ON(!state); |
1da177e4c Linux-2.6.12-rc2 |
554 |
|
1493bf217 block: use struct... |
555 |
data = read_part_sector(state, 0, §); |
1da177e4c Linux-2.6.12-rc2 |
556 |
if (!data) { |
1dd45aae7 ldm: Silence "ldm... |
557 |
ldm_info ("Disk read failed."); |
130c6b989 [PATCH] fs/partit... |
558 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
559 560 561 562 563 564 565 |
} if (*(__le16*) (data + 0x01FE) != cpu_to_le16 (MSDOS_LABEL_MAGIC)) goto out; p = (struct partition*)(data + 0x01BE); for (i = 0; i < 4; i++, p++) |
dde33348e LDM: Fix for Wind... |
566 |
if (SYS_IND (p) == LDM_PARTITION) { |
130c6b989 [PATCH] fs/partit... |
567 |
result = true; |
1da177e4c Linux-2.6.12-rc2 |
568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 |
break; } if (result) ldm_debug ("Found W2K dynamic disk partition type."); out: put_dev_sector (sect); return result; } /** * ldm_get_disk_objid - Search a linked list of vblk's for a given Disk Id * @ldb: Cache of the database structures * * The LDM Database contains a list of all partitions on all dynamic disks. * The primary PRIVHEAD, at the beginning of the physical disk, tells us * the GUID of this disk. This function searches for the GUID in a linked * list of vblk's. * * Return: Pointer, A matching vblk was found * NULL, No match, or an error */ static struct vblk * ldm_get_disk_objid (const struct ldmdb *ldb) { struct list_head *item; BUG_ON (!ldb); list_for_each (item, &ldb->v_disk) { struct vblk *v = list_entry (item, struct vblk, list); if (!memcmp (v->vblk.disk.disk_id, ldb->ph.disk_id, GUID_SIZE)) return v; } return NULL; } /** * ldm_create_data_partitions - Create data partitions for this device * @pp: List of the partitions parsed so far * @ldb: Cache of the database structures * * The database contains ALL the partitions for ALL disk groups, so we need to * filter out this specific disk. Using the disk's object id, we can find all * the partitions in the database that belong to this disk. * * Add each partition in our database, to the parsed_partitions structure. * * N.B. This function creates the partitions in the order it finds partition * objects in the linked list. * |
130c6b989 [PATCH] fs/partit... |
620 621 |
* Return: 'true' Partition created * 'false' Error, probably a range checking problem |
1da177e4c Linux-2.6.12-rc2 |
622 |
*/ |
130c6b989 [PATCH] fs/partit... |
623 |
static bool ldm_create_data_partitions (struct parsed_partitions *pp, |
1da177e4c Linux-2.6.12-rc2 |
624 625 626 627 628 629 630 631 632 633 634 635 636 |
const struct ldmdb *ldb) { struct list_head *item; struct vblk *vb; struct vblk *disk; struct vblk_part *part; int part_num = 1; BUG_ON (!pp || !ldb); disk = ldm_get_disk_objid (ldb); if (!disk) { ldm_crit ("Can't find the ID of this disk in the database."); |
130c6b989 [PATCH] fs/partit... |
637 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
638 |
} |
9c867fbe0 partitions: fix s... |
639 |
strlcat(pp->pp_buf, " [LDM]", PAGE_SIZE); |
1da177e4c Linux-2.6.12-rc2 |
640 641 642 643 644 645 646 647 648 649 650 651 652 |
/* Create the data partitions */ list_for_each (item, &ldb->v_part) { vb = list_entry (item, struct vblk, list); part = &vb->vblk.part; if (part->disk_id != disk->obj_id) continue; put_partition (pp, part_num, ldb->ph.logical_disk_start + part->start, part->size); part_num++; } |
9c867fbe0 partitions: fix s... |
653 654 |
strlcat(pp->pp_buf, " ", PAGE_SIZE); |
130c6b989 [PATCH] fs/partit... |
655 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 |
} /** * ldm_relative - Calculate the next relative offset * @buffer: Block of data being worked on * @buflen: Size of the block of data * @base: Size of the previous fixed width fields * @offset: Cumulative size of the previous variable-width fields * * Because many of the VBLK fields are variable-width, it's necessary * to calculate each offset based on the previous one and the length * of the field it pointed to. * * Return: -1 Error, the calculated offset exceeded the size of the buffer * n OK, a range-checked offset into buffer */ |
959bc220d Fix LDM for new f... |
673 |
static int ldm_relative(const u8 *buffer, int buflen, int base, int offset) |
1da177e4c Linux-2.6.12-rc2 |
674 675 676 |
{ base += offset; |
959bc220d Fix LDM for new f... |
677 678 679 680 681 682 683 |
if (!buffer || offset < 0 || base > buflen) { if (!buffer) ldm_error("!buffer"); if (offset < 0) ldm_error("offset (%d) < 0", offset); if (base > buflen) ldm_error("base (%d) > buflen (%d)", base, buflen); |
1da177e4c Linux-2.6.12-rc2 |
684 |
return -1; |
959bc220d Fix LDM for new f... |
685 686 687 688 |
} if (base + buffer[base] >= buflen) { ldm_error("base (%d) + buffer[base] (%d) >= buflen (%d)", base, buffer[base], buflen); |
1da177e4c Linux-2.6.12-rc2 |
689 |
return -1; |
959bc220d Fix LDM for new f... |
690 |
} |
1da177e4c Linux-2.6.12-rc2 |
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 |
return buffer[base] + offset + 1; } /** * ldm_get_vnum - Convert a variable-width, big endian number, into cpu order * @block: Pointer to the variable-width number to convert * * Large numbers in the LDM Database are often stored in a packed format. Each * number is prefixed by a one byte width marker. All numbers in the database * are stored in big-endian byte order. This function reads one of these * numbers and returns the result * * N.B. This function DOES NOT perform any range checking, though the most * it will read is eight bytes. * * Return: n A number * 0 Zero, or an error occurred */ static u64 ldm_get_vnum (const u8 *block) { u64 tmp = 0; u8 length; BUG_ON (!block); length = *block++; if (length && length <= 8) while (length--) tmp = (tmp << 8) | *block++; else ldm_error ("Illegal length %d.", length); return tmp; } /** * ldm_get_vstr - Read a length-prefixed string into a buffer * @block: Pointer to the length marker * @buffer: Location to copy string to * @buflen: Size of the output buffer * * Many of the strings in the LDM Database are not NULL terminated. Instead * they are prefixed by a one byte length marker. This function copies one of * these strings into a buffer. * * N.B. This function DOES NOT perform any range checking on the input. * If the buffer is too small, the output will be truncated. * * Return: 0, Error and @buffer contents are undefined * n, String length in characters (excluding NULL) * buflen-1, String was truncated. */ static int ldm_get_vstr (const u8 *block, u8 *buffer, int buflen) { int length; BUG_ON (!block || !buffer); length = block[0]; if (length >= buflen) { ldm_error ("Truncating string %d -> %d.", length, buflen); length = buflen - 1; } memcpy (buffer, block + 1, length); buffer[length] = 0; return length; } /** * ldm_parse_cmp3 - Read a raw VBLK Component object into a vblk structure * @buffer: Block of data being worked on * @buflen: Size of the block of data * @vb: In-memory vblk in which to return information * * Read a raw VBLK Component object (version 3) into a vblk structure. * |
130c6b989 [PATCH] fs/partit... |
769 770 |
* Return: 'true' @vb contains a Component VBLK * 'false' @vb contents are not defined |
1da177e4c Linux-2.6.12-rc2 |
771 |
*/ |
130c6b989 [PATCH] fs/partit... |
772 |
static bool ldm_parse_cmp3 (const u8 *buffer, int buflen, struct vblk *vb) |
1da177e4c Linux-2.6.12-rc2 |
773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 |
{ int r_objid, r_name, r_vstate, r_child, r_parent, r_stripe, r_cols, len; struct vblk_comp *comp; BUG_ON (!buffer || !vb); r_objid = ldm_relative (buffer, buflen, 0x18, 0); r_name = ldm_relative (buffer, buflen, 0x18, r_objid); r_vstate = ldm_relative (buffer, buflen, 0x18, r_name); r_child = ldm_relative (buffer, buflen, 0x1D, r_vstate); r_parent = ldm_relative (buffer, buflen, 0x2D, r_child); if (buffer[0x12] & VBLK_FLAG_COMP_STRIPE) { r_stripe = ldm_relative (buffer, buflen, 0x2E, r_parent); r_cols = ldm_relative (buffer, buflen, 0x2E, r_stripe); len = r_cols; } else { r_stripe = 0; r_cols = 0; len = r_parent; } if (len < 0) |
130c6b989 [PATCH] fs/partit... |
795 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
796 797 |
len += VBLK_SIZE_CMP3; |
b7bbf8fa6 fs: ldm.[ch] use ... |
798 |
if (len != get_unaligned_be32(buffer + 0x14)) |
130c6b989 [PATCH] fs/partit... |
799 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
800 801 802 803 804 805 806 807 |
comp = &vb->vblk.comp; ldm_get_vstr (buffer + 0x18 + r_name, comp->state, sizeof (comp->state)); comp->type = buffer[0x18 + r_vstate]; comp->children = ldm_get_vnum (buffer + 0x1D + r_vstate); comp->parent_id = ldm_get_vnum (buffer + 0x2D + r_child); comp->chunksize = r_stripe ? ldm_get_vnum (buffer+r_parent+0x2E) : 0; |
130c6b989 [PATCH] fs/partit... |
808 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
809 810 811 812 813 814 815 816 817 818 |
} /** * ldm_parse_dgr3 - Read a raw VBLK Disk Group object into a vblk structure * @buffer: Block of data being worked on * @buflen: Size of the block of data * @vb: In-memory vblk in which to return information * * Read a raw VBLK Disk Group object (version 3) into a vblk structure. * |
130c6b989 [PATCH] fs/partit... |
819 820 |
* Return: 'true' @vb contains a Disk Group VBLK * 'false' @vb contents are not defined |
1da177e4c Linux-2.6.12-rc2 |
821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 |
*/ static int ldm_parse_dgr3 (const u8 *buffer, int buflen, struct vblk *vb) { int r_objid, r_name, r_diskid, r_id1, r_id2, len; struct vblk_dgrp *dgrp; BUG_ON (!buffer || !vb); r_objid = ldm_relative (buffer, buflen, 0x18, 0); r_name = ldm_relative (buffer, buflen, 0x18, r_objid); r_diskid = ldm_relative (buffer, buflen, 0x18, r_name); if (buffer[0x12] & VBLK_FLAG_DGR3_IDS) { r_id1 = ldm_relative (buffer, buflen, 0x24, r_diskid); r_id2 = ldm_relative (buffer, buflen, 0x24, r_id1); len = r_id2; } else { r_id1 = 0; r_id2 = 0; len = r_diskid; } if (len < 0) |
130c6b989 [PATCH] fs/partit... |
843 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
844 845 |
len += VBLK_SIZE_DGR3; |
b7bbf8fa6 fs: ldm.[ch] use ... |
846 |
if (len != get_unaligned_be32(buffer + 0x14)) |
130c6b989 [PATCH] fs/partit... |
847 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
848 849 850 851 |
dgrp = &vb->vblk.dgrp; ldm_get_vstr (buffer + 0x18 + r_name, dgrp->disk_id, sizeof (dgrp->disk_id)); |
130c6b989 [PATCH] fs/partit... |
852 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
853 854 855 856 857 858 859 860 861 862 |
} /** * ldm_parse_dgr4 - Read a raw VBLK Disk Group object into a vblk structure * @buffer: Block of data being worked on * @buflen: Size of the block of data * @vb: In-memory vblk in which to return information * * Read a raw VBLK Disk Group object (version 4) into a vblk structure. * |
130c6b989 [PATCH] fs/partit... |
863 864 |
* Return: 'true' @vb contains a Disk Group VBLK * 'false' @vb contents are not defined |
1da177e4c Linux-2.6.12-rc2 |
865 |
*/ |
130c6b989 [PATCH] fs/partit... |
866 |
static bool ldm_parse_dgr4 (const u8 *buffer, int buflen, struct vblk *vb) |
1da177e4c Linux-2.6.12-rc2 |
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 |
{ char buf[64]; int r_objid, r_name, r_id1, r_id2, len; struct vblk_dgrp *dgrp; BUG_ON (!buffer || !vb); r_objid = ldm_relative (buffer, buflen, 0x18, 0); r_name = ldm_relative (buffer, buflen, 0x18, r_objid); if (buffer[0x12] & VBLK_FLAG_DGR4_IDS) { r_id1 = ldm_relative (buffer, buflen, 0x44, r_name); r_id2 = ldm_relative (buffer, buflen, 0x44, r_id1); len = r_id2; } else { r_id1 = 0; r_id2 = 0; len = r_name; } if (len < 0) |
130c6b989 [PATCH] fs/partit... |
887 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
888 889 |
len += VBLK_SIZE_DGR4; |
b7bbf8fa6 fs: ldm.[ch] use ... |
890 |
if (len != get_unaligned_be32(buffer + 0x14)) |
130c6b989 [PATCH] fs/partit... |
891 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
892 893 894 895 |
dgrp = &vb->vblk.dgrp; ldm_get_vstr (buffer + 0x18 + r_objid, buf, sizeof (buf)); |
130c6b989 [PATCH] fs/partit... |
896 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
897 898 899 900 901 902 903 904 905 906 |
} /** * ldm_parse_dsk3 - Read a raw VBLK Disk object into a vblk structure * @buffer: Block of data being worked on * @buflen: Size of the block of data * @vb: In-memory vblk in which to return information * * Read a raw VBLK Disk object (version 3) into a vblk structure. * |
130c6b989 [PATCH] fs/partit... |
907 908 |
* Return: 'true' @vb contains a Disk VBLK * 'false' @vb contents are not defined |
1da177e4c Linux-2.6.12-rc2 |
909 |
*/ |
130c6b989 [PATCH] fs/partit... |
910 |
static bool ldm_parse_dsk3 (const u8 *buffer, int buflen, struct vblk *vb) |
1da177e4c Linux-2.6.12-rc2 |
911 912 913 914 915 916 917 918 919 920 921 922 |
{ int r_objid, r_name, r_diskid, r_altname, len; struct vblk_disk *disk; BUG_ON (!buffer || !vb); r_objid = ldm_relative (buffer, buflen, 0x18, 0); r_name = ldm_relative (buffer, buflen, 0x18, r_objid); r_diskid = ldm_relative (buffer, buflen, 0x18, r_name); r_altname = ldm_relative (buffer, buflen, 0x18, r_diskid); len = r_altname; if (len < 0) |
130c6b989 [PATCH] fs/partit... |
923 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
924 925 |
len += VBLK_SIZE_DSK3; |
b7bbf8fa6 fs: ldm.[ch] use ... |
926 |
if (len != get_unaligned_be32(buffer + 0x14)) |
130c6b989 [PATCH] fs/partit... |
927 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
928 929 930 931 932 |
disk = &vb->vblk.disk; ldm_get_vstr (buffer + 0x18 + r_diskid, disk->alt_name, sizeof (disk->alt_name)); if (!ldm_parse_guid (buffer + 0x19 + r_name, disk->disk_id)) |
130c6b989 [PATCH] fs/partit... |
933 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
934 |
|
130c6b989 [PATCH] fs/partit... |
935 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
936 937 938 939 940 941 942 943 944 945 |
} /** * ldm_parse_dsk4 - Read a raw VBLK Disk object into a vblk structure * @buffer: Block of data being worked on * @buflen: Size of the block of data * @vb: In-memory vblk in which to return information * * Read a raw VBLK Disk object (version 4) into a vblk structure. * |
130c6b989 [PATCH] fs/partit... |
946 947 |
* Return: 'true' @vb contains a Disk VBLK * 'false' @vb contents are not defined |
1da177e4c Linux-2.6.12-rc2 |
948 |
*/ |
130c6b989 [PATCH] fs/partit... |
949 |
static bool ldm_parse_dsk4 (const u8 *buffer, int buflen, struct vblk *vb) |
1da177e4c Linux-2.6.12-rc2 |
950 951 952 953 954 955 956 957 958 959 |
{ int r_objid, r_name, len; struct vblk_disk *disk; BUG_ON (!buffer || !vb); r_objid = ldm_relative (buffer, buflen, 0x18, 0); r_name = ldm_relative (buffer, buflen, 0x18, r_objid); len = r_name; if (len < 0) |
130c6b989 [PATCH] fs/partit... |
960 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
961 962 |
len += VBLK_SIZE_DSK4; |
b7bbf8fa6 fs: ldm.[ch] use ... |
963 |
if (len != get_unaligned_be32(buffer + 0x14)) |
130c6b989 [PATCH] fs/partit... |
964 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
965 966 967 |
disk = &vb->vblk.disk; memcpy (disk->disk_id, buffer + 0x18 + r_name, GUID_SIZE); |
130c6b989 [PATCH] fs/partit... |
968 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
969 970 971 972 973 974 975 976 977 978 |
} /** * ldm_parse_prt3 - Read a raw VBLK Partition object into a vblk structure * @buffer: Block of data being worked on * @buflen: Size of the block of data * @vb: In-memory vblk in which to return information * * Read a raw VBLK Partition object (version 3) into a vblk structure. * |
130c6b989 [PATCH] fs/partit... |
979 980 |
* Return: 'true' @vb contains a Partition VBLK * 'false' @vb contents are not defined |
1da177e4c Linux-2.6.12-rc2 |
981 |
*/ |
dde33348e LDM: Fix for Wind... |
982 |
static bool ldm_parse_prt3(const u8 *buffer, int buflen, struct vblk *vb) |
1da177e4c Linux-2.6.12-rc2 |
983 984 985 |
{ int r_objid, r_name, r_size, r_parent, r_diskid, r_index, len; struct vblk_part *part; |
dde33348e LDM: Fix for Wind... |
986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 |
BUG_ON(!buffer || !vb); r_objid = ldm_relative(buffer, buflen, 0x18, 0); if (r_objid < 0) { ldm_error("r_objid %d < 0", r_objid); return false; } r_name = ldm_relative(buffer, buflen, 0x18, r_objid); if (r_name < 0) { ldm_error("r_name %d < 0", r_name); return false; } r_size = ldm_relative(buffer, buflen, 0x34, r_name); if (r_size < 0) { ldm_error("r_size %d < 0", r_size); return false; } r_parent = ldm_relative(buffer, buflen, 0x34, r_size); if (r_parent < 0) { ldm_error("r_parent %d < 0", r_parent); return false; } r_diskid = ldm_relative(buffer, buflen, 0x34, r_parent); if (r_diskid < 0) { ldm_error("r_diskid %d < 0", r_diskid); return false; } |
1da177e4c Linux-2.6.12-rc2 |
1012 |
if (buffer[0x12] & VBLK_FLAG_PART_INDEX) { |
dde33348e LDM: Fix for Wind... |
1013 1014 1015 1016 1017 |
r_index = ldm_relative(buffer, buflen, 0x34, r_diskid); if (r_index < 0) { ldm_error("r_index %d < 0", r_index); return false; } |
1da177e4c Linux-2.6.12-rc2 |
1018 1019 1020 1021 1022 |
len = r_index; } else { r_index = 0; len = r_diskid; } |
dde33348e LDM: Fix for Wind... |
1023 1024 |
if (len < 0) { ldm_error("len %d < 0", len); |
130c6b989 [PATCH] fs/partit... |
1025 |
return false; |
dde33348e LDM: Fix for Wind... |
1026 |
} |
1da177e4c Linux-2.6.12-rc2 |
1027 |
len += VBLK_SIZE_PRT3; |
b7bbf8fa6 fs: ldm.[ch] use ... |
1028 |
if (len > get_unaligned_be32(buffer + 0x14)) { |
dde33348e LDM: Fix for Wind... |
1029 |
ldm_error("len %d > BE32(buffer + 0x14) %d", len, |
b7bbf8fa6 fs: ldm.[ch] use ... |
1030 |
get_unaligned_be32(buffer + 0x14)); |
130c6b989 [PATCH] fs/partit... |
1031 |
return false; |
dde33348e LDM: Fix for Wind... |
1032 |
} |
1da177e4c Linux-2.6.12-rc2 |
1033 |
part = &vb->vblk.part; |
b7bbf8fa6 fs: ldm.[ch] use ... |
1034 1035 |
part->start = get_unaligned_be64(buffer + 0x24 + r_name); part->volume_offset = get_unaligned_be64(buffer + 0x2C + r_name); |
dde33348e LDM: Fix for Wind... |
1036 1037 1038 |
part->size = ldm_get_vnum(buffer + 0x34 + r_name); part->parent_id = ldm_get_vnum(buffer + 0x34 + r_size); part->disk_id = ldm_get_vnum(buffer + 0x34 + r_parent); |
1da177e4c Linux-2.6.12-rc2 |
1039 1040 1041 1042 |
if (vb->flags & VBLK_FLAG_PART_INDEX) part->partnum = buffer[0x35 + r_diskid]; else part->partnum = 0; |
130c6b989 [PATCH] fs/partit... |
1043 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 |
} /** * ldm_parse_vol5 - Read a raw VBLK Volume object into a vblk structure * @buffer: Block of data being worked on * @buflen: Size of the block of data * @vb: In-memory vblk in which to return information * * Read a raw VBLK Volume object (version 5) into a vblk structure. * |
130c6b989 [PATCH] fs/partit... |
1054 1055 |
* Return: 'true' @vb contains a Volume VBLK * 'false' @vb contents are not defined |
1da177e4c Linux-2.6.12-rc2 |
1056 |
*/ |
959bc220d Fix LDM for new f... |
1057 |
static bool ldm_parse_vol5(const u8 *buffer, int buflen, struct vblk *vb) |
1da177e4c Linux-2.6.12-rc2 |
1058 |
{ |
959bc220d Fix LDM for new f... |
1059 1060 |
int r_objid, r_name, r_vtype, r_disable_drive_letter, r_child, r_size; int r_id1, r_id2, r_size2, r_drive, len; |
1da177e4c Linux-2.6.12-rc2 |
1061 |
struct vblk_volu *volu; |
959bc220d Fix LDM for new f... |
1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 |
BUG_ON(!buffer || !vb); r_objid = ldm_relative(buffer, buflen, 0x18, 0); if (r_objid < 0) { ldm_error("r_objid %d < 0", r_objid); return false; } r_name = ldm_relative(buffer, buflen, 0x18, r_objid); if (r_name < 0) { ldm_error("r_name %d < 0", r_name); return false; } r_vtype = ldm_relative(buffer, buflen, 0x18, r_name); if (r_vtype < 0) { ldm_error("r_vtype %d < 0", r_vtype); return false; } r_disable_drive_letter = ldm_relative(buffer, buflen, 0x18, r_vtype); if (r_disable_drive_letter < 0) { ldm_error("r_disable_drive_letter %d < 0", r_disable_drive_letter); return false; } r_child = ldm_relative(buffer, buflen, 0x2D, r_disable_drive_letter); if (r_child < 0) { ldm_error("r_child %d < 0", r_child); return false; } r_size = ldm_relative(buffer, buflen, 0x3D, r_child); if (r_size < 0) { ldm_error("r_size %d < 0", r_size); return false; } if (buffer[0x12] & VBLK_FLAG_VOLU_ID1) { r_id1 = ldm_relative(buffer, buflen, 0x52, r_size); if (r_id1 < 0) { ldm_error("r_id1 %d < 0", r_id1); return false; } } else |
1da177e4c Linux-2.6.12-rc2 |
1101 |
r_id1 = r_size; |
959bc220d Fix LDM for new f... |
1102 1103 1104 1105 1106 1107 1108 |
if (buffer[0x12] & VBLK_FLAG_VOLU_ID2) { r_id2 = ldm_relative(buffer, buflen, 0x52, r_id1); if (r_id2 < 0) { ldm_error("r_id2 %d < 0", r_id2); return false; } } else |
1da177e4c Linux-2.6.12-rc2 |
1109 |
r_id2 = r_id1; |
959bc220d Fix LDM for new f... |
1110 1111 1112 1113 1114 1115 1116 |
if (buffer[0x12] & VBLK_FLAG_VOLU_SIZE) { r_size2 = ldm_relative(buffer, buflen, 0x52, r_id2); if (r_size2 < 0) { ldm_error("r_size2 %d < 0", r_size2); return false; } } else |
1da177e4c Linux-2.6.12-rc2 |
1117 |
r_size2 = r_id2; |
959bc220d Fix LDM for new f... |
1118 1119 1120 1121 1122 1123 1124 |
if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) { r_drive = ldm_relative(buffer, buflen, 0x52, r_size2); if (r_drive < 0) { ldm_error("r_drive %d < 0", r_drive); return false; } } else |
1da177e4c Linux-2.6.12-rc2 |
1125 |
r_drive = r_size2; |
1da177e4c Linux-2.6.12-rc2 |
1126 |
len = r_drive; |
959bc220d Fix LDM for new f... |
1127 1128 |
if (len < 0) { ldm_error("len %d < 0", len); |
130c6b989 [PATCH] fs/partit... |
1129 |
return false; |
959bc220d Fix LDM for new f... |
1130 |
} |
1da177e4c Linux-2.6.12-rc2 |
1131 |
len += VBLK_SIZE_VOL5; |
b7bbf8fa6 fs: ldm.[ch] use ... |
1132 |
if (len > get_unaligned_be32(buffer + 0x14)) { |
959bc220d Fix LDM for new f... |
1133 |
ldm_error("len %d > BE32(buffer + 0x14) %d", len, |
b7bbf8fa6 fs: ldm.[ch] use ... |
1134 |
get_unaligned_be32(buffer + 0x14)); |
130c6b989 [PATCH] fs/partit... |
1135 |
return false; |
959bc220d Fix LDM for new f... |
1136 |
} |
1da177e4c Linux-2.6.12-rc2 |
1137 |
volu = &vb->vblk.volu; |
959bc220d Fix LDM for new f... |
1138 1139 1140 1141 1142 1143 1144 |
ldm_get_vstr(buffer + 0x18 + r_name, volu->volume_type, sizeof(volu->volume_type)); memcpy(volu->volume_state, buffer + 0x18 + r_disable_drive_letter, sizeof(volu->volume_state)); volu->size = ldm_get_vnum(buffer + 0x3D + r_child); volu->partition_type = buffer[0x41 + r_size]; memcpy(volu->guid, buffer + 0x42 + r_size, sizeof(volu->guid)); |
1da177e4c Linux-2.6.12-rc2 |
1145 |
if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) { |
959bc220d Fix LDM for new f... |
1146 1147 |
ldm_get_vstr(buffer + 0x52 + r_size, volu->drive_hint, sizeof(volu->drive_hint)); |
1da177e4c Linux-2.6.12-rc2 |
1148 |
} |
130c6b989 [PATCH] fs/partit... |
1149 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 |
} /** * ldm_parse_vblk - Read a raw VBLK object into a vblk structure * @buf: Block of data being worked on * @len: Size of the block of data * @vb: In-memory vblk in which to return information * * Read a raw VBLK object into a vblk structure. This function just reads the * information common to all VBLK types, then delegates the rest of the work to * helper functions: ldm_parse_*. * |
130c6b989 [PATCH] fs/partit... |
1162 1163 |
* Return: 'true' @vb contains a VBLK * 'false' @vb contents are not defined |
1da177e4c Linux-2.6.12-rc2 |
1164 |
*/ |
130c6b989 [PATCH] fs/partit... |
1165 |
static bool ldm_parse_vblk (const u8 *buf, int len, struct vblk *vb) |
1da177e4c Linux-2.6.12-rc2 |
1166 |
{ |
130c6b989 [PATCH] fs/partit... |
1167 |
bool result = false; |
1da177e4c Linux-2.6.12-rc2 |
1168 1169 1170 1171 1172 1173 1174 |
int r_objid; BUG_ON (!buf || !vb); r_objid = ldm_relative (buf, len, 0x18, 0); if (r_objid < 0) { ldm_error ("VBLK header is corrupt."); |
130c6b989 [PATCH] fs/partit... |
1175 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 |
} vb->flags = buf[0x12]; vb->type = buf[0x13]; vb->obj_id = ldm_get_vnum (buf + 0x18); ldm_get_vstr (buf+0x18+r_objid, vb->name, sizeof (vb->name)); switch (vb->type) { case VBLK_CMP3: result = ldm_parse_cmp3 (buf, len, vb); break; case VBLK_DSK3: result = ldm_parse_dsk3 (buf, len, vb); break; case VBLK_DSK4: result = ldm_parse_dsk4 (buf, len, vb); break; case VBLK_DGR3: result = ldm_parse_dgr3 (buf, len, vb); break; case VBLK_DGR4: result = ldm_parse_dgr4 (buf, len, vb); break; case VBLK_PRT3: result = ldm_parse_prt3 (buf, len, vb); break; case VBLK_VOL5: result = ldm_parse_vol5 (buf, len, vb); break; } if (result) ldm_debug ("Parsed VBLK 0x%llx (type: 0x%02x) ok.", (unsigned long long) vb->obj_id, vb->type); else ldm_error ("Failed to parse VBLK 0x%llx (type: 0x%02x).", (unsigned long long) vb->obj_id, vb->type); return result; } /** * ldm_ldmdb_add - Adds a raw VBLK entry to the ldmdb database * @data: Raw VBLK to add to the database * @len: Size of the raw VBLK * @ldb: Cache of the database structures * * The VBLKs are sorted into categories. Partitions are also sorted by offset. * * N.B. This function does not check the validity of the VBLKs. * |
130c6b989 [PATCH] fs/partit... |
1214 1215 |
* Return: 'true' The VBLK was added * 'false' An error occurred |
1da177e4c Linux-2.6.12-rc2 |
1216 |
*/ |
130c6b989 [PATCH] fs/partit... |
1217 |
static bool ldm_ldmdb_add (u8 *data, int len, struct ldmdb *ldb) |
1da177e4c Linux-2.6.12-rc2 |
1218 1219 1220 1221 1222 1223 1224 1225 1226 |
{ struct vblk *vb; struct list_head *item; BUG_ON (!data || !ldb); vb = kmalloc (sizeof (*vb), GFP_KERNEL); if (!vb) { ldm_crit ("Out of memory."); |
130c6b989 [PATCH] fs/partit... |
1227 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
1228 1229 1230 1231 |
} if (!ldm_parse_vblk (data, len, vb)) { kfree(vb); |
130c6b989 [PATCH] fs/partit... |
1232 |
return false; /* Already logged */ |
1da177e4c Linux-2.6.12-rc2 |
1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 |
} /* Put vblk into the correct list. */ switch (vb->type) { case VBLK_DGR3: case VBLK_DGR4: list_add (&vb->list, &ldb->v_dgrp); break; case VBLK_DSK3: case VBLK_DSK4: list_add (&vb->list, &ldb->v_disk); break; case VBLK_VOL5: list_add (&vb->list, &ldb->v_volu); break; case VBLK_CMP3: list_add (&vb->list, &ldb->v_comp); break; case VBLK_PRT3: /* Sort by the partition's start sector. */ list_for_each (item, &ldb->v_part) { struct vblk *v = list_entry (item, struct vblk, list); if ((v->vblk.part.disk_id == vb->vblk.part.disk_id) && (v->vblk.part.start > vb->vblk.part.start)) { list_add_tail (&vb->list, &v->list); |
130c6b989 [PATCH] fs/partit... |
1258 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1259 1260 1261 1262 1263 |
} } list_add_tail (&vb->list, &ldb->v_part); break; } |
130c6b989 [PATCH] fs/partit... |
1264 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 |
} /** * ldm_frag_add - Add a VBLK fragment to a list * @data: Raw fragment to be added to the list * @size: Size of the raw fragment * @frags: Linked list of VBLK fragments * * Fragmented VBLKs may not be consecutive in the database, so they are placed * in a list so they can be pieced together later. * |
130c6b989 [PATCH] fs/partit... |
1276 1277 |
* Return: 'true' Success, the VBLK was added to the list * 'false' Error, a problem occurred |
1da177e4c Linux-2.6.12-rc2 |
1278 |
*/ |
130c6b989 [PATCH] fs/partit... |
1279 |
static bool ldm_frag_add (const u8 *data, int size, struct list_head *frags) |
1da177e4c Linux-2.6.12-rc2 |
1280 1281 1282 1283 1284 1285 |
{ struct frag *f; struct list_head *item; int rec, num, group; BUG_ON (!data || !frags); |
c340b1d64 fs/partitions/ldm... |
1286 1287 1288 1289 |
if (size < 2 * VBLK_SIZE_HEAD) { ldm_error("Value of size is to small."); return false; } |
b7bbf8fa6 fs: ldm.[ch] use ... |
1290 1291 1292 |
group = get_unaligned_be32(data + 0x08); rec = get_unaligned_be16(data + 0x0C); num = get_unaligned_be16(data + 0x0E); |
1da177e4c Linux-2.6.12-rc2 |
1293 1294 |
if ((num < 1) || (num > 4)) { ldm_error ("A VBLK claims to have %d parts.", num); |
130c6b989 [PATCH] fs/partit... |
1295 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
1296 |
} |
c340b1d64 fs/partitions/ldm... |
1297 1298 1299 1300 |
if (rec >= num) { ldm_error("REC value (%d) exceeds NUM value (%d)", rec, num); return false; } |
1da177e4c Linux-2.6.12-rc2 |
1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 |
list_for_each (item, frags) { f = list_entry (item, struct frag, list); if (f->group == group) goto found; } f = kmalloc (sizeof (*f) + size*num, GFP_KERNEL); if (!f) { ldm_crit ("Out of memory."); |
130c6b989 [PATCH] fs/partit... |
1311 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
1312 1313 1314 1315 1316 1317 1318 1319 1320 |
} f->group = group; f->num = num; f->rec = rec; f->map = 0xFF << num; list_add_tail (&f->list, frags); found: |
cae13fe4c Fix for buffer ov... |
1321 1322 1323 1324 |
if (rec >= f->num) { ldm_error("REC value (%d) exceeds NUM value (%d)", rec, f->num); return false; } |
1da177e4c Linux-2.6.12-rc2 |
1325 1326 1327 |
if (f->map & (1 << rec)) { ldm_error ("Duplicate VBLK, part %d.", rec); f->map &= 0x7F; /* Mark the group as broken */ |
130c6b989 [PATCH] fs/partit... |
1328 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
1329 1330 1331 |
} f->map |= (1 << rec); |
c340b1d64 fs/partitions/ldm... |
1332 1333 |
data += VBLK_SIZE_HEAD; size -= VBLK_SIZE_HEAD; |
1da177e4c Linux-2.6.12-rc2 |
1334 |
memcpy (f->data+rec*(size-VBLK_SIZE_HEAD)+VBLK_SIZE_HEAD, data, size); |
130c6b989 [PATCH] fs/partit... |
1335 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 |
} /** * ldm_frag_free - Free a linked list of VBLK fragments * @list: Linked list of fragments * * Free a linked list of VBLK fragments * * Return: none */ static void ldm_frag_free (struct list_head *list) { struct list_head *item, *tmp; BUG_ON (!list); list_for_each_safe (item, tmp, list) kfree (list_entry (item, struct frag, list)); } /** * ldm_frag_commit - Validate fragmented VBLKs and add them to the database * @frags: Linked list of VBLK fragments * @ldb: Cache of the database structures * * Now that all the fragmented VBLKs have been collected, they must be added to * the database for later use. * |
130c6b989 [PATCH] fs/partit... |
1364 1365 |
* Return: 'true' All the fragments we added successfully * 'false' One or more of the fragments we invalid |
1da177e4c Linux-2.6.12-rc2 |
1366 |
*/ |
130c6b989 [PATCH] fs/partit... |
1367 |
static bool ldm_frag_commit (struct list_head *frags, struct ldmdb *ldb) |
1da177e4c Linux-2.6.12-rc2 |
1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 |
{ struct frag *f; struct list_head *item; BUG_ON (!frags || !ldb); list_for_each (item, frags) { f = list_entry (item, struct frag, list); if (f->map != 0xFF) { ldm_error ("VBLK group %d is incomplete (0x%02x).", f->group, f->map); |
130c6b989 [PATCH] fs/partit... |
1380 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
1381 1382 1383 |
} if (!ldm_ldmdb_add (f->data, f->num*ldb->vm.vblk_size, ldb)) |
130c6b989 [PATCH] fs/partit... |
1384 |
return false; /* Already logged */ |
1da177e4c Linux-2.6.12-rc2 |
1385 |
} |
130c6b989 [PATCH] fs/partit... |
1386 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1387 1388 1389 1390 |
} /** * ldm_get_vblks - Read the on-disk database of VBLKs into memory |
1493bf217 block: use struct... |
1391 1392 |
* @state: Partition check state including device holding the LDM Database * @base: Offset, into @state->bdev, of the database |
1da177e4c Linux-2.6.12-rc2 |
1393 1394 1395 1396 1397 |
* @ldb: Cache of the database structures * * To use the information from the VBLKs, they need to be read from the disk, * unpacked and validated. We cache them in @ldb according to their type. * |
130c6b989 [PATCH] fs/partit... |
1398 1399 |
* Return: 'true' All the VBLKs were read successfully * 'false' An error occurred |
1da177e4c Linux-2.6.12-rc2 |
1400 |
*/ |
1493bf217 block: use struct... |
1401 1402 |
static bool ldm_get_vblks(struct parsed_partitions *state, unsigned long base, struct ldmdb *ldb) |
1da177e4c Linux-2.6.12-rc2 |
1403 1404 1405 1406 |
{ int size, perbuf, skip, finish, s, v, recs; u8 *data = NULL; Sector sect; |
130c6b989 [PATCH] fs/partit... |
1407 |
bool result = false; |
1da177e4c Linux-2.6.12-rc2 |
1408 |
LIST_HEAD (frags); |
1493bf217 block: use struct... |
1409 |
BUG_ON(!state || !ldb); |
1da177e4c Linux-2.6.12-rc2 |
1410 1411 1412 1413 1414 1415 1416 |
size = ldb->vm.vblk_size; perbuf = 512 / size; skip = ldb->vm.vblk_offset >> 9; /* Bytes to sectors */ finish = (size * ldb->vm.last_vblk_seq) >> 9; for (s = skip; s < finish; s++) { /* For each sector */ |
1493bf217 block: use struct... |
1417 |
data = read_part_sector(state, base + OFF_VMDB + s, §); |
1da177e4c Linux-2.6.12-rc2 |
1418 1419 1420 1421 1422 1423 |
if (!data) { ldm_crit ("Disk read failed."); goto out; } for (v = 0; v < perbuf; v++, data+=size) { /* For each vblk */ |
b7bbf8fa6 fs: ldm.[ch] use ... |
1424 |
if (MAGIC_VBLK != get_unaligned_be32(data)) { |
1da177e4c Linux-2.6.12-rc2 |
1425 1426 1427 |
ldm_error ("Expected to find a VBLK."); goto out; } |
b7bbf8fa6 fs: ldm.[ch] use ... |
1428 |
recs = get_unaligned_be16(data + 0x0E); /* Number of records */ |
1da177e4c Linux-2.6.12-rc2 |
1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 |
if (recs == 1) { if (!ldm_ldmdb_add (data, size, ldb)) goto out; /* Already logged */ } else if (recs > 1) { if (!ldm_frag_add (data, size, &frags)) goto out; /* Already logged */ } /* else Record is not in use, ignore it. */ } put_dev_sector (sect); data = NULL; } result = ldm_frag_commit (&frags, ldb); /* Failures, already logged */ out: if (data) put_dev_sector (sect); ldm_frag_free (&frags); return result; } /** * ldm_free_vblks - Free a linked list of vblk's * @lh: Head of a linked list of struct vblk * * Free a list of vblk's and free the memory used to maintain the list. * * Return: none */ static void ldm_free_vblks (struct list_head *lh) { struct list_head *item, *tmp; BUG_ON (!lh); list_for_each_safe (item, tmp, lh) kfree (list_entry (item, struct vblk, list)); } /** * ldm_partition - Find out whether a device is a dynamic disk and handle it |
1493bf217 block: use struct... |
1472 |
* @state: Partition check state including device holding the LDM Database |
1da177e4c Linux-2.6.12-rc2 |
1473 1474 1475 1476 1477 1478 1479 1480 1481 |
* * This determines whether the device @bdev is a dynamic disk and if so creates * the partitions necessary in the gendisk structure pointed to by @hd. * * We create a dummy device 1, which contains the LDM database, and then create * each partition described by the LDM database in sequence as devices 2+. For * example, if the device is hda, we would have: hda1: LDM database, hda2, hda3, * and so on: the actual data containing partitions. * |
1493bf217 block: use struct... |
1482 1483 |
* Return: 1 Success, @state->bdev is a dynamic disk and we handled it * 0 Success, @state->bdev is not a dynamic disk |
1da177e4c Linux-2.6.12-rc2 |
1484 |
* -1 An error occurred before enough information had been read |
1493bf217 block: use struct... |
1485 |
* Or @state->bdev is a dynamic disk, but it may be corrupted |
1da177e4c Linux-2.6.12-rc2 |
1486 |
*/ |
1493bf217 block: use struct... |
1487 |
int ldm_partition(struct parsed_partitions *state) |
1da177e4c Linux-2.6.12-rc2 |
1488 1489 1490 1491 |
{ struct ldmdb *ldb; unsigned long base; int result = -1; |
1493bf217 block: use struct... |
1492 |
BUG_ON(!state); |
1da177e4c Linux-2.6.12-rc2 |
1493 1494 |
/* Look for signs of a Dynamic Disk */ |
1493bf217 block: use struct... |
1495 |
if (!ldm_validate_partition_table(state)) |
1da177e4c Linux-2.6.12-rc2 |
1496 1497 1498 1499 1500 1501 1502 1503 1504 |
return 0; ldb = kmalloc (sizeof (*ldb), GFP_KERNEL); if (!ldb) { ldm_crit ("Out of memory."); goto out; } /* Parse and check privheads. */ |
1493bf217 block: use struct... |
1505 |
if (!ldm_validate_privheads(state, &ldb->ph)) |
1da177e4c Linux-2.6.12-rc2 |
1506 1507 1508 1509 1510 1511 |
goto out; /* Already logged */ /* All further references are relative to base (database start). */ base = ldb->ph.config_start; /* Parse and check tocs and vmdb. */ |
1493bf217 block: use struct... |
1512 1513 |
if (!ldm_validate_tocblocks(state, base, ldb) || !ldm_validate_vmdb(state, base, ldb)) |
1da177e4c Linux-2.6.12-rc2 |
1514 1515 1516 1517 1518 1519 1520 1521 |
goto out; /* Already logged */ /* Initialize vblk lists in ldmdb struct */ INIT_LIST_HEAD (&ldb->v_dgrp); INIT_LIST_HEAD (&ldb->v_disk); INIT_LIST_HEAD (&ldb->v_volu); INIT_LIST_HEAD (&ldb->v_comp); INIT_LIST_HEAD (&ldb->v_part); |
1493bf217 block: use struct... |
1522 |
if (!ldm_get_vblks(state, base, ldb)) { |
1da177e4c Linux-2.6.12-rc2 |
1523 1524 1525 1526 1527 |
ldm_crit ("Failed to read the VBLKs from the database."); goto cleanup; } /* Finally, create the data partition devices. */ |
1493bf217 block: use struct... |
1528 |
if (ldm_create_data_partitions(state, ldb)) { |
1da177e4c Linux-2.6.12-rc2 |
1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 |
ldm_debug ("Parsed LDM database successfully."); result = 1; } /* else Already logged */ cleanup: ldm_free_vblks (&ldb->v_dgrp); ldm_free_vblks (&ldb->v_disk); ldm_free_vblks (&ldb->v_volu); ldm_free_vblks (&ldb->v_comp); ldm_free_vblks (&ldb->v_part); out: kfree (ldb); return result; } |