1 /* 2 * super.c 3 * 4 * PURPOSE 5 * Super block routines for the OSTA-UDF(tm) filesystem. 6 * 7 * DESCRIPTION 8 * OSTA-UDF(tm) = Optical Storage Technology Association 9 * Universal Disk Format. 10 * 11 * This code is based on version 2.00 of the UDF specification, 12 * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. 13 * http://www.osta.org/ 14 * http://www.ecma.ch/ 15 * http://www.iso.org/ 16 * 17 * COPYRIGHT 18 * This file is distributed under the terms of the GNU General Public 19 * License (GPL). Copies of the GPL can be obtained from: 20 * ftp://prep.ai.mit.edu/pub/gnu/GPL 21 * Each contributing author retains all rights to their own work. 22 * 23 * (C) 1998 Dave Boynton 24 * (C) 1998-2004 Ben Fennema 25 * (C) 2000 Stelias Computing Inc 26 * 27 * HISTORY 28 * 29 * 09/24/98 dgb changed to allow compiling outside of kernel, and 30 * added some debugging. 31 * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 32 * 10/16/98 attempting some multi-session support 33 * 10/17/98 added freespace count for "df" 34 * 11/11/98 gr added novrs option 35 * 11/26/98 dgb added fileset,anchor mount options 36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced vol descs 37 * rewrote option handling based on isofs 38 * 12/20/98 find the free space bitmap (if it exists) 39 */ 40 41 #include "udfdecl.h" 42 43 #include <linux/blkdev.h> 44 #include <linux/slab.h> 45 #include <linux/kernel.h> 46 #include <linux/module.h> 47 #include <linux/parser.h> 48 #include <linux/stat.h> 49 #include <linux/cdrom.h> 50 #include <linux/nls.h> 51 #include <linux/smp_lock.h> 52 #include <linux/buffer_head.h> 53 #include <linux/vfs.h> 54 #include <linux/vmalloc.h> 55 #include <asm/byteorder.h> 56 57 #include <linux/udf_fs.h> 58 #include "udf_sb.h" 59 #include "udf_i.h" 60 61 #include <linux/init.h> 62 #include <asm/uaccess.h> 63 64 #define VDS_POS_PRIMARY_VOL_DESC 0 65 #define VDS_POS_UNALLOC_SPACE_DESC 1 66 #define VDS_POS_LOGICAL_VOL_DESC 2 67 #define VDS_POS_PARTITION_DESC 3 68 #define VDS_POS_IMP_USE_VOL_DESC 4 69 #define VDS_POS_VOL_DESC_PTR 5 70 #define VDS_POS_TERMINATING_DESC 6 71 #define VDS_POS_LENGTH 7 72 73 static char error_buf[1024]; 74 75 /* These are the "meat" - everything else is stuffing */ 76 static int udf_fill_super(struct super_block *, void *, int); 77 static void udf_put_super(struct super_block *); 78 static void udf_write_super(struct super_block *); 79 static int udf_remount_fs(struct super_block *, int *, char *); 80 static int udf_check_valid(struct super_block *, int, int); 81 static int udf_vrs(struct super_block *sb, int silent); 82 static int udf_load_partition(struct super_block *, kernel_lb_addr *); 83 static int udf_load_logicalvol(struct super_block *, struct buffer_head *, kernel_lb_addr *); 84 static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad); 85 static void udf_find_anchor(struct super_block *); 86 static int udf_find_fileset(struct super_block *, kernel_lb_addr *, kernel_lb_addr *); 87 static void udf_load_pvoldesc(struct super_block *, struct buffer_head *); 88 static void udf_load_fileset(struct super_block *, struct buffer_head *, kernel_lb_addr *); 89 static void udf_load_partdesc(struct super_block *, struct buffer_head *); 90 static void udf_open_lvid(struct super_block *); 91 static void udf_close_lvid(struct super_block *); 92 static unsigned int udf_count_free(struct super_block *); 93 static int udf_statfs(struct dentry *, struct kstatfs *); 94 95 /* UDF filesystem type */ 96 static int udf_get_sb(struct file_system_type *fs_type, 97 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 98 { 99 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); 100 } 101 102 static struct file_system_type udf_fstype = { 103 .owner = THIS_MODULE, 104 .name = "udf", 105 .get_sb = udf_get_sb, 106 .kill_sb = kill_block_super, 107 .fs_flags = FS_REQUIRES_DEV, 108 }; 109 110 static struct kmem_cache * udf_inode_cachep; 111 112 static struct inode *udf_alloc_inode(struct super_block *sb) 113 { 114 struct udf_inode_info *ei; 115 ei = (struct udf_inode_info *)kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); 116 if (!ei) 117 return NULL; 118 119 ei->i_unique = 0; 120 ei->i_lenExtents = 0; 121 ei->i_next_alloc_block = 0; 122 ei->i_next_alloc_goal = 0; 123 ei->i_strat4096 = 0; 124 125 return &ei->vfs_inode; 126 } 127 128 static void udf_destroy_inode(struct inode *inode) 129 { 130 kmem_cache_free(udf_inode_cachep, UDF_I(inode)); 131 } 132 133 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) 134 { 135 struct udf_inode_info *ei = (struct udf_inode_info *) foo; 136 137 ei->i_ext.i_data = NULL; 138 inode_init_once(&ei->vfs_inode); 139 } 140 141 static int init_inodecache(void) 142 { 143 udf_inode_cachep = kmem_cache_create("udf_inode_cache", 144 sizeof(struct udf_inode_info), 145 0, (SLAB_RECLAIM_ACCOUNT| 146 SLAB_MEM_SPREAD), 147 init_once, NULL); 148 if (udf_inode_cachep == NULL) 149 return -ENOMEM; 150 return 0; 151 } 152 153 static void destroy_inodecache(void) 154 { 155 kmem_cache_destroy(udf_inode_cachep); 156 } 157 158 /* Superblock operations */ 159 static const struct super_operations udf_sb_ops = { 160 .alloc_inode = udf_alloc_inode, 161 .destroy_inode = udf_destroy_inode, 162 .write_inode = udf_write_inode, 163 .delete_inode = udf_delete_inode, 164 .clear_inode = udf_clear_inode, 165 .put_super = udf_put_super, 166 .write_super = udf_write_super, 167 .statfs = udf_statfs, 168 .remount_fs = udf_remount_fs, 169 }; 170 171 struct udf_options 172 { 173 unsigned char novrs; 174 unsigned int blocksize; 175 unsigned int session; 176 unsigned int lastblock; 177 unsigned int anchor; 178 unsigned int volume; 179 unsigned short partition; 180 unsigned int fileset; 181 unsigned int rootdir; 182 unsigned int flags; 183 mode_t umask; 184 gid_t gid; 185 uid_t uid; 186 struct nls_table *nls_map; 187 }; 188 189 static int __init init_udf_fs(void) 190 { 191 int err; 192 err = init_inodecache(); 193 if (err) 194 goto out1; 195 err = register_filesystem(&udf_fstype); 196 if (err) 197 goto out; 198 return 0; 199 out: 200 destroy_inodecache(); 201 out1: 202 return err; 203 } 204 205 static void __exit exit_udf_fs(void) 206 { 207 unregister_filesystem(&udf_fstype); 208 destroy_inodecache(); 209 } 210 211 module_init(init_udf_fs) 212 module_exit(exit_udf_fs) 213 214 /* 215 * udf_parse_options 216 * 217 * PURPOSE 218 * Parse mount options. 219 * 220 * DESCRIPTION 221 * The following mount options are supported: 222 * 223 * gid= Set the default group. 224 * umask= Set the default umask. 225 * uid= Set the default user. 226 * bs= Set the block size. 227 * unhide Show otherwise hidden files. 228 * undelete Show deleted files in lists. 229 * adinicb Embed data in the inode (default) 230 * noadinicb Don't embed data in the inode 231 * shortad Use short ad's 232 * longad Use long ad's (default) 233 * nostrict Unset strict conformance 234 * iocharset= Set the NLS character set 235 * 236 * The remaining are for debugging and disaster recovery: 237 * 238 * novrs Skip volume sequence recognition 239 * 240 * The following expect a offset from 0. 241 * 242 * session= Set the CDROM session (default= last session) 243 * anchor= Override standard anchor location. (default= 256) 244 * volume= Override the VolumeDesc location. (unused) 245 * partition= Override the PartitionDesc location. (unused) 246 * lastblock= Set the last block of the filesystem/ 247 * 248 * The following expect a offset from the partition root. 249 * 250 * fileset= Override the fileset block location. (unused) 251 * rootdir= Override the root directory location. (unused) 252 * WARNING: overriding the rootdir to a non-directory may 253 * yield highly unpredictable results. 254 * 255 * PRE-CONDITIONS 256 * options Pointer to mount options string. 257 * uopts Pointer to mount options variable. 258 * 259 * POST-CONDITIONS 260 * <return> 1 Mount options parsed okay. 261 * <return> 0 Error parsing mount options. 262 * 263 * HISTORY 264 * July 1, 1997 - Andrew E. Mileski 265 * Written, tested, and released. 266 */ 267 268 enum { 269 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, 270 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, 271 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, 272 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, 273 Opt_rootdir, Opt_utf8, Opt_iocharset, 274 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore 275 }; 276 277 static match_table_t tokens = { 278 {Opt_novrs, "novrs"}, 279 {Opt_nostrict, "nostrict"}, 280 {Opt_bs, "bs=%u"}, 281 {Opt_unhide, "unhide"}, 282 {Opt_undelete, "undelete"}, 283 {Opt_noadinicb, "noadinicb"}, 284 {Opt_adinicb, "adinicb"}, 285 {Opt_shortad, "shortad"}, 286 {Opt_longad, "longad"}, 287 {Opt_uforget, "uid=forget"}, 288 {Opt_uignore, "uid=ignore"}, 289 {Opt_gforget, "gid=forget"}, 290 {Opt_gignore, "gid=ignore"}, 291 {Opt_gid, "gid=%u"}, 292 {Opt_uid, "uid=%u"}, 293 {Opt_umask, "umask=%o"}, 294 {Opt_session, "session=%u"}, 295 {Opt_lastblock, "lastblock=%u"}, 296 {Opt_anchor, "anchor=%u"}, 297 {Opt_volume, "volume=%u"}, 298 {Opt_partition, "partition=%u"}, 299 {Opt_fileset, "fileset=%u"}, 300 {Opt_rootdir, "rootdir=%u"}, 301 {Opt_utf8, "utf8"}, 302 {Opt_iocharset, "iocharset=%s"}, 303 {Opt_err, NULL} 304 }; 305 306 static int 307 udf_parse_options(char *options, struct udf_options *uopt) 308 { 309 char *p; 310 int option; 311 312 uopt->novrs = 0; 313 uopt->blocksize = 2048; 314 uopt->partition = 0xFFFF; 315 uopt->session = 0xFFFFFFFF; 316 uopt->lastblock = 0; 317 uopt->anchor = 0; 318 uopt->volume = 0xFFFFFFFF; 319 uopt->rootdir = 0xFFFFFFFF; 320 uopt->fileset = 0xFFFFFFFF; 321 uopt->nls_map = NULL; 322 323 if (!options) 324 return 1; 325 326 while ((p = strsep(&options, ",")) != NULL) 327 { 328 substring_t args[MAX_OPT_ARGS]; 329 int token; 330 if (!*p) 331 continue; 332 333 token = match_token(p, tokens, args); 334 switch (token) 335 { 336 case Opt_novrs: 337 uopt->novrs = 1; 338 case Opt_bs: 339 if (match_int(&args[0], &option)) 340 return 0; 341 uopt->blocksize = option; 342 break; 343 case Opt_unhide: 344 uopt->flags |= (1 << UDF_FLAG_UNHIDE); 345 break; 346 case Opt_undelete: 347 uopt->flags |= (1 << UDF_FLAG_UNDELETE); 348 break; 349 case Opt_noadinicb: 350 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); 351 break; 352 case Opt_adinicb: 353 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); 354 break; 355 case Opt_shortad: 356 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); 357 break; 358 case Opt_longad: 359 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); 360 break; 361 case Opt_gid: 362 if (match_int(args, &option)) 363 return 0; 364 uopt->gid = option; 365 break; 366 case Opt_uid: 367 if (match_int(args, &option)) 368 return 0; 369 uopt->uid = option; 370 break; 371 case Opt_umask: 372 if (match_octal(args, &option)) 373 return 0; 374 uopt->umask = option; 375 break; 376 case Opt_nostrict: 377 uopt->flags &= ~(1 << UDF_FLAG_STRICT); 378 break; 379 case Opt_session: 380 if (match_int(args, &option)) 381 return 0; 382 uopt->session = option; 383 break; 384 case Opt_lastblock: 385 if (match_int(args, &option)) 386 return 0; 387 uopt->lastblock = option; 388 break; 389 case Opt_anchor: 390 if (match_int(args, &option)) 391 return 0; 392 uopt->anchor = option; 393 break; 394 case Opt_volume: 395 if (match_int(args, &option)) 396 return 0; 397 uopt->volume = option; 398 break; 399 case Opt_partition: 400 if (match_int(args, &option)) 401 return 0; 402 uopt->partition = option; 403 break; 404 case Opt_fileset: 405 if (match_int(args, &option)) 406 return 0; 407 uopt->fileset = option; 408 break; 409 case Opt_rootdir: 410 if (match_int(args, &option)) 411 return 0; 412 uopt->rootdir = option; 413 break; 414 case Opt_utf8: 415 uopt->flags |= (1 << UDF_FLAG_UTF8); 416 break; 417 #ifdef CONFIG_UDF_NLS 418 case Opt_iocharset: 419 uopt->nls_map = load_nls(args[0].from); 420 uopt->flags |= (1 << UDF_FLAG_NLS_MAP); 421 break; 422 #endif 423 case Opt_uignore: 424 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); 425 break; 426 case Opt_uforget: 427 uopt->flags |= (1 << UDF_FLAG_UID_FORGET); 428 break; 429 case Opt_gignore: 430 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); 431 break; 432 case Opt_gforget: 433 uopt->flags |= (1 << UDF_FLAG_GID_FORGET); 434 break; 435 default: 436 printk(KERN_ERR "udf: bad mount option \"%s\" " 437 "or missing value\n", p); 438 return 0; 439 } 440 } 441 return 1; 442 } 443 444 void 445 udf_write_super(struct super_block *sb) 446 { 447 lock_kernel(); 448 if (!(sb->s_flags & MS_RDONLY)) 449 udf_open_lvid(sb); 450 sb->s_dirt = 0; 451 unlock_kernel(); 452 } 453 454 static int 455 udf_remount_fs(struct super_block *sb, int *flags, char *options) 456 { 457 struct udf_options uopt; 458 459 uopt.flags = UDF_SB(sb)->s_flags ; 460 uopt.uid = UDF_SB(sb)->s_uid ; 461 uopt.gid = UDF_SB(sb)->s_gid ; 462 uopt.umask = UDF_SB(sb)->s_umask ; 463 464 if ( !udf_parse_options(options, &uopt) ) 465 return -EINVAL; 466 467 UDF_SB(sb)->s_flags = uopt.flags; 468 UDF_SB(sb)->s_uid = uopt.uid; 469 UDF_SB(sb)->s_gid = uopt.gid; 470 UDF_SB(sb)->s_umask = uopt.umask; 471 472 if (UDF_SB_LVIDBH(sb)) { 473 int write_rev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev); 474 if (write_rev > UDF_MAX_WRITE_VERSION) 475 *flags |= MS_RDONLY; 476 } 477 478 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 479 return 0; 480 if (*flags & MS_RDONLY) 481 udf_close_lvid(sb); 482 else 483 udf_open_lvid(sb); 484 485 return 0; 486 } 487 488 /* 489 * udf_set_blocksize 490 * 491 * PURPOSE 492 * Set the block size to be used in all transfers. 493 * 494 * DESCRIPTION 495 * To allow room for a DMA transfer, it is best to guess big when unsure. 496 * This routine picks 2048 bytes as the blocksize when guessing. This 497 * should be adequate until devices with larger block sizes become common. 498 * 499 * Note that the Linux kernel can currently only deal with blocksizes of 500 * 512, 1024, 2048, 4096, and 8192 bytes. 501 * 502 * PRE-CONDITIONS 503 * sb Pointer to _locked_ superblock. 504 * 505 * POST-CONDITIONS 506 * sb->s_blocksize Blocksize. 507 * sb->s_blocksize_bits log2 of blocksize. 508 * <return> 0 Blocksize is valid. 509 * <return> 1 Blocksize is invalid. 510 * 511 * HISTORY 512 * July 1, 1997 - Andrew E. Mileski 513 * Written, tested, and released. 514 */ 515 static int 516 udf_set_blocksize(struct super_block *sb, int bsize) 517 { 518 if (!sb_min_blocksize(sb, bsize)) { 519 udf_debug("Bad block size (%d)\n", bsize); 520 printk(KERN_ERR "udf: bad block size (%d)\n", bsize); 521 return 0; 522 } 523 return sb->s_blocksize; 524 } 525 526 static int 527 udf_vrs(struct super_block *sb, int silent) 528 { 529 struct volStructDesc *vsd = NULL; 530 int sector = 32768; 531 int sectorsize; 532 struct buffer_head *bh = NULL; 533 int iso9660=0; 534 int nsr02=0; 535 int nsr03=0; 536 537 /* Block size must be a multiple of 512 */ 538 if (sb->s_blocksize & 511) 539 return 0; 540 541 if (sb->s_blocksize < sizeof(struct volStructDesc)) 542 sectorsize = sizeof(struct volStructDesc); 543 else 544 sectorsize = sb->s_blocksize; 545 546 sector += (UDF_SB_SESSION(sb) << sb->s_blocksize_bits); 547 548 udf_debug("Starting at sector %u (%ld byte sectors)\n", 549 (sector >> sb->s_blocksize_bits), sb->s_blocksize); 550 /* Process the sequence (if applicable) */ 551 for (;!nsr02 && !nsr03; sector += sectorsize) 552 { 553 /* Read a block */ 554 bh = udf_tread(sb, sector >> sb->s_blocksize_bits); 555 if (!bh) 556 break; 557 558 /* Look for ISO descriptors */ 559 vsd = (struct volStructDesc *)(bh->b_data + 560 (sector & (sb->s_blocksize - 1))); 561 562 if (vsd->stdIdent[0] == 0) 563 { 564 brelse(bh); 565 break; 566 } 567 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN)) 568 { 569 iso9660 = sector; 570 switch (vsd->structType) 571 { 572 case 0: 573 udf_debug("ISO9660 Boot Record found\n"); 574 break; 575 case 1: 576 udf_debug("ISO9660 Primary Volume Descriptor found\n"); 577 break; 578 case 2: 579 udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); 580 break; 581 case 3: 582 udf_debug("ISO9660 Volume Partition Descriptor found\n"); 583 break; 584 case 255: 585 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); 586 break; 587 default: 588 udf_debug("ISO9660 VRS (%u) found\n", vsd->structType); 589 break; 590 } 591 } 592 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN)) 593 { 594 } 595 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, VSD_STD_ID_LEN)) 596 { 597 brelse(bh); 598 break; 599 } 600 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN)) 601 { 602 nsr02 = sector; 603 } 604 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN)) 605 { 606 nsr03 = sector; 607 } 608 brelse(bh); 609 } 610 611 if (nsr03) 612 return nsr03; 613 else if (nsr02) 614 return nsr02; 615 else if (sector - (UDF_SB_SESSION(sb) << sb->s_blocksize_bits) == 32768) 616 return -1; 617 else 618 return 0; 619 } 620 621 /* 622 * udf_find_anchor 623 * 624 * PURPOSE 625 * Find an anchor volume descriptor. 626 * 627 * PRE-CONDITIONS 628 * sb Pointer to _locked_ superblock. 629 * lastblock Last block on media. 630 * 631 * POST-CONDITIONS 632 * <return> 1 if not found, 0 if ok 633 * 634 * HISTORY 635 * July 1, 1997 - Andrew E. Mileski 636 * Written, tested, and released. 637 */ 638 static void 639 udf_find_anchor(struct super_block *sb) 640 { 641 int lastblock = UDF_SB_LASTBLOCK(sb); 642 struct buffer_head *bh = NULL; 643 uint16_t ident; 644 uint32_t location; 645 int i; 646 647 if (lastblock) 648 { 649 int varlastblock = udf_variable_to_fixed(lastblock); 650 int last[] = { lastblock, lastblock - 2, 651 lastblock - 150, lastblock - 152, 652 varlastblock, varlastblock - 2, 653 varlastblock - 150, varlastblock - 152 }; 654 655 lastblock = 0; 656 657 /* Search for an anchor volume descriptor pointer */ 658 659 /* according to spec, anchor is in either: 660 * block 256 661 * lastblock-256 662 * lastblock 663 * however, if the disc isn't closed, it could be 512 */ 664 665 for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) { 666 if (last[i] < 0 || !(bh = sb_bread(sb, last[i]))) 667 { 668 ident = location = 0; 669 } 670 else 671 { 672 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); 673 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); 674 brelse(bh); 675 } 676 677 if (ident == TAG_IDENT_AVDP) 678 { 679 if (location == last[i] - UDF_SB_SESSION(sb)) 680 { 681 lastblock = UDF_SB_ANCHOR(sb)[0] = last[i] - UDF_SB_SESSION(sb); 682 UDF_SB_ANCHOR(sb)[1] = last[i] - 256 - UDF_SB_SESSION(sb); 683 } 684 else if (location == udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb)) 685 { 686 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); 687 lastblock = UDF_SB_ANCHOR(sb)[0] = udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb); 688 UDF_SB_ANCHOR(sb)[1] = lastblock - 256 - UDF_SB_SESSION(sb); 689 } 690 else 691 udf_debug("Anchor found at block %d, location mismatch %d.\n", 692 last[i], location); 693 } 694 else if (ident == TAG_IDENT_FE || ident == TAG_IDENT_EFE) 695 { 696 lastblock = last[i]; 697 UDF_SB_ANCHOR(sb)[3] = 512; 698 } 699 else 700 { 701 if (last[i] < 256 || !(bh = sb_bread(sb, last[i] - 256))) 702 { 703 ident = location = 0; 704 } 705 else 706 { 707 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); 708 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); 709 brelse(bh); 710 } 711 712 if (ident == TAG_IDENT_AVDP && 713 location == last[i] - 256 - UDF_SB_SESSION(sb)) 714 { 715 lastblock = last[i]; 716 UDF_SB_ANCHOR(sb)[1] = last[i] - 256; 717 } 718 else 719 { 720 if (last[i] < 312 + UDF_SB_SESSION(sb) || !(bh = sb_bread(sb, last[i] - 312 - UDF_SB_SESSION(sb)))) 721 { 722 ident = location = 0; 723 } 724 else 725 { 726 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); 727 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); 728 brelse(bh); 729 } 730 731 if (ident == TAG_IDENT_AVDP && 732 location == udf_variable_to_fixed(last[i]) - 256) 733 { 734 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); 735 lastblock = udf_variable_to_fixed(last[i]); 736 UDF_SB_ANCHOR(sb)[1] = lastblock - 256; 737 } 738 } 739 } 740 } 741 } 742 743 if (!lastblock) 744 { 745 /* We havn't found the lastblock. check 312 */ 746 if ((bh = sb_bread(sb, 312 + UDF_SB_SESSION(sb)))) 747 { 748 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); 749 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); 750 brelse(bh); 751 752 if (ident == TAG_IDENT_AVDP && location == 256) 753 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); 754 } 755 } 756 757 for (i = 0; i < ARRAY_SIZE(UDF_SB_ANCHOR(sb)); i++) { 758 if (UDF_SB_ANCHOR(sb)[i]) 759 { 760 if (!(bh = udf_read_tagged(sb, 761 UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident))) 762 { 763 UDF_SB_ANCHOR(sb)[i] = 0; 764 } 765 else 766 { 767 brelse(bh); 768 if ((ident != TAG_IDENT_AVDP) && (i || 769 (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE))) 770 { 771 UDF_SB_ANCHOR(sb)[i] = 0; 772 } 773 } 774 } 775 } 776 777 UDF_SB_LASTBLOCK(sb) = lastblock; 778 } 779 780 static int 781 udf_find_fileset(struct super_block *sb, kernel_lb_addr *fileset, kernel_lb_addr *root) 782 { 783 struct buffer_head *bh = NULL; 784 long lastblock; 785 uint16_t ident; 786 787 if (fileset->logicalBlockNum != 0xFFFFFFFF || 788 fileset->partitionReferenceNum != 0xFFFF) 789 { 790 bh = udf_read_ptagged(sb, *fileset, 0, &ident); 791 792 if (!bh) 793 return 1; 794 else if (ident != TAG_IDENT_FSD) 795 { 796 brelse(bh); 797 return 1; 798 } 799 800 } 801 802 if (!bh) /* Search backwards through the partitions */ 803 { 804 kernel_lb_addr newfileset; 805 806 return 1; 807 808 for (newfileset.partitionReferenceNum=UDF_SB_NUMPARTS(sb)-1; 809 (newfileset.partitionReferenceNum != 0xFFFF && 810 fileset->logicalBlockNum == 0xFFFFFFFF && 811 fileset->partitionReferenceNum == 0xFFFF); 812 newfileset.partitionReferenceNum--) 813 { 814 lastblock = UDF_SB_PARTLEN(sb, newfileset.partitionReferenceNum); 815 newfileset.logicalBlockNum = 0; 816 817 do 818 { 819 bh = udf_read_ptagged(sb, newfileset, 0, &ident); 820 if (!bh) 821 { 822 newfileset.logicalBlockNum ++; 823 continue; 824 } 825 826 switch (ident) 827 { 828 case TAG_IDENT_SBD: 829 { 830 struct spaceBitmapDesc *sp; 831 sp = (struct spaceBitmapDesc *)bh->b_data; 832 newfileset.logicalBlockNum += 1 + 833 ((le32_to_cpu(sp->numOfBytes) + sizeof(struct spaceBitmapDesc) - 1) 834 >> sb->s_blocksize_bits); 835 brelse(bh); 836 break; 837 } 838 case TAG_IDENT_FSD: 839 { 840 *fileset = newfileset; 841 break; 842 } 843 default: 844 { 845 newfileset.logicalBlockNum ++; 846 brelse(bh); 847 bh = NULL; 848 break; 849 } 850 } 851 } 852 while (newfileset.logicalBlockNum < lastblock && 853 fileset->logicalBlockNum == 0xFFFFFFFF && 854 fileset->partitionReferenceNum == 0xFFFF); 855 } 856 } 857 858 if ((fileset->logicalBlockNum != 0xFFFFFFFF || 859 fileset->partitionReferenceNum != 0xFFFF) && bh) 860 { 861 udf_debug("Fileset at block=%d, partition=%d\n", 862 fileset->logicalBlockNum, fileset->partitionReferenceNum); 863 864 UDF_SB_PARTITION(sb) = fileset->partitionReferenceNum; 865 udf_load_fileset(sb, bh, root); 866 brelse(bh); 867 return 0; 868 } 869 return 1; 870 } 871 872 static void 873 udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh) 874 { 875 struct primaryVolDesc *pvoldesc; 876 time_t recording; 877 long recording_usec; 878 struct ustr instr; 879 struct ustr outstr; 880 881 pvoldesc = (struct primaryVolDesc *)bh->b_data; 882 883 if ( udf_stamp_to_time(&recording, &recording_usec, 884 lets_to_cpu(pvoldesc->recordingDateAndTime)) ) 885 { 886 kernel_timestamp ts; 887 ts = lets_to_cpu(pvoldesc->recordingDateAndTime); 888 udf_debug("recording time %ld/%ld, %04u/%02u/%02u %02u:%02u (%x)\n", 889 recording, recording_usec, 890 ts.year, ts.month, ts.day, ts.hour, ts.minute, ts.typeAndTimezone); 891 UDF_SB_RECORDTIME(sb).tv_sec = recording; 892 UDF_SB_RECORDTIME(sb).tv_nsec = recording_usec * 1000; 893 } 894 895 if ( !udf_build_ustr(&instr, pvoldesc->volIdent, 32) ) 896 { 897 if (udf_CS0toUTF8(&outstr, &instr)) 898 { 899 strncpy( UDF_SB_VOLIDENT(sb), outstr.u_name, 900 outstr.u_len > 31 ? 31 : outstr.u_len); 901 udf_debug("volIdent[] = '%s'\n", UDF_SB_VOLIDENT(sb)); 902 } 903 } 904 905 if ( !udf_build_ustr(&instr, pvoldesc->volSetIdent, 128) ) 906 { 907 if (udf_CS0toUTF8(&outstr, &instr)) 908 udf_debug("volSetIdent[] = '%s'\n", outstr.u_name); 909 } 910 } 911 912 static void 913 udf_load_fileset(struct super_block *sb, struct buffer_head *bh, kernel_lb_addr *root) 914 { 915 struct fileSetDesc *fset; 916 917 fset = (struct fileSetDesc *)bh->b_data; 918 919 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); 920 921 UDF_SB_SERIALNUM(sb) = le16_to_cpu(fset->descTag.tagSerialNum); 922 923 udf_debug("Rootdir at block=%d, partition=%d\n", 924 root->logicalBlockNum, root->partitionReferenceNum); 925 } 926 927 static void 928 udf_load_partdesc(struct super_block *sb, struct buffer_head *bh) 929 { 930 struct partitionDesc *p; 931 int i; 932 933 p = (struct partitionDesc *)bh->b_data; 934 935 for (i=0; i<UDF_SB_NUMPARTS(sb); i++) 936 { 937 udf_debug("Searching map: (%d == %d)\n", 938 UDF_SB_PARTMAPS(sb)[i].s_partition_num, le16_to_cpu(p->partitionNumber)); 939 if (UDF_SB_PARTMAPS(sb)[i].s_partition_num == le16_to_cpu(p->partitionNumber)) 940 { 941 UDF_SB_PARTLEN(sb,i) = le32_to_cpu(p->partitionLength); /* blocks */ 942 UDF_SB_PARTROOT(sb,i) = le32_to_cpu(p->partitionStartingLocation); 943 if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_READ_ONLY) 944 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_READ_ONLY; 945 if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_WRITE_ONCE) 946 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_WRITE_ONCE; 947 if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_REWRITABLE) 948 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_REWRITABLE; 949 if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_OVERWRITABLE) 950 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_OVERWRITABLE; 951 952 if (!strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) || 953 !strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) 954 { 955 struct partitionHeaderDesc *phd; 956 957 phd = (struct partitionHeaderDesc *)(p->partitionContentsUse); 958 if (phd->unallocSpaceTable.extLength) 959 { 960 kernel_lb_addr loc = { le32_to_cpu(phd->unallocSpaceTable.extPosition), i }; 961 962 UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table = 963 udf_iget(sb, loc); 964 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_TABLE; 965 udf_debug("unallocSpaceTable (part %d) @ %ld\n", 966 i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table->i_ino); 967 } 968 if (phd->unallocSpaceBitmap.extLength) 969 { 970 UDF_SB_ALLOC_BITMAP(sb, i, s_uspace); 971 if (UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap != NULL) 972 { 973 UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extLength = 974 le32_to_cpu(phd->unallocSpaceBitmap.extLength); 975 UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition = 976 le32_to_cpu(phd->unallocSpaceBitmap.extPosition); 977 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_BITMAP; 978 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", 979 i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition); 980 } 981 } 982 if (phd->partitionIntegrityTable.extLength) 983 udf_debug("partitionIntegrityTable (part %d)\n", i); 984 if (phd->freedSpaceTable.extLength) 985 { 986 kernel_lb_addr loc = { le32_to_cpu(phd->freedSpaceTable.extPosition), i }; 987 988 UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table = 989 udf_iget(sb, loc); 990 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_TABLE; 991 udf_debug("freedSpaceTable (part %d) @ %ld\n", 992 i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table->i_ino); 993 } 994 if (phd->freedSpaceBitmap.extLength) 995 { 996 UDF_SB_ALLOC_BITMAP(sb, i, s_fspace); 997 if (UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap != NULL) 998 { 999 UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extLength = 1000 le32_to_cpu(phd->freedSpaceBitmap.extLength); 1001 UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition = 1002 le32_to_cpu(phd->freedSpaceBitmap.extPosition); 1003 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_BITMAP; 1004 udf_debug("freedSpaceBitmap (part %d) @ %d\n", 1005 i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition); 1006 } 1007 } 1008 } 1009 break; 1010 } 1011 } 1012 if (i == UDF_SB_NUMPARTS(sb)) 1013 { 1014 udf_debug("Partition (%d) not found in partition map\n", le16_to_cpu(p->partitionNumber)); 1015 } 1016 else 1017 { 1018 udf_debug("Partition (%d:%d type %x) starts at physical %d, block length %d\n", 1019 le16_to_cpu(p->partitionNumber), i, UDF_SB_PARTTYPE(sb,i), 1020 UDF_SB_PARTROOT(sb,i), UDF_SB_PARTLEN(sb,i)); 1021 } 1022 } 1023 1024 static int 1025 udf_load_logicalvol(struct super_block *sb, struct buffer_head * bh, kernel_lb_addr *fileset) 1026 { 1027 struct logicalVolDesc *lvd; 1028 int i, j, offset; 1029 uint8_t type; 1030 1031 lvd = (struct logicalVolDesc *)bh->b_data; 1032 1033 UDF_SB_ALLOC_PARTMAPS(sb, le32_to_cpu(lvd->numPartitionMaps)); 1034 1035 for (i=0,offset=0; 1036 i<UDF_SB_NUMPARTS(sb) && offset<le32_to_cpu(lvd->mapTableLength); 1037 i++,offset+=((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength) 1038 { 1039 type = ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType; 1040 if (type == 1) 1041 { 1042 struct genericPartitionMap1 *gpm1 = (struct genericPartitionMap1 *)&(lvd->partitionMaps[offset]); 1043 UDF_SB_PARTTYPE(sb,i) = UDF_TYPE1_MAP15; 1044 UDF_SB_PARTVSN(sb,i) = le16_to_cpu(gpm1->volSeqNum); 1045 UDF_SB_PARTNUM(sb,i) = le16_to_cpu(gpm1->partitionNum); 1046 UDF_SB_PARTFUNC(sb,i) = NULL; 1047 } 1048 else if (type == 2) 1049 { 1050 struct udfPartitionMap2 *upm2 = (struct udfPartitionMap2 *)&(lvd->partitionMaps[offset]); 1051 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, strlen(UDF_ID_VIRTUAL))) 1052 { 1053 if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0150) 1054 { 1055 UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP15; 1056 UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt15; 1057 } 1058 else if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0200) 1059 { 1060 UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP20; 1061 UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt20; 1062 } 1063 } 1064 else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE))) 1065 { 1066 uint32_t loc; 1067 uint16_t ident; 1068 struct sparingTable *st; 1069 struct sparablePartitionMap *spm = (struct sparablePartitionMap *)&(lvd->partitionMaps[offset]); 1070 1071 UDF_SB_PARTTYPE(sb,i) = UDF_SPARABLE_MAP15; 1072 UDF_SB_TYPESPAR(sb,i).s_packet_len = le16_to_cpu(spm->packetLength); 1073 for (j=0; j<spm->numSparingTables; j++) 1074 { 1075 loc = le32_to_cpu(spm->locSparingTable[j]); 1076 UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = 1077 udf_read_tagged(sb, loc, loc, &ident); 1078 if (UDF_SB_TYPESPAR(sb,i).s_spar_map[j] != NULL) 1079 { 1080 st = (struct sparingTable *)UDF_SB_TYPESPAR(sb,i).s_spar_map[j]->b_data; 1081 if (ident != 0 || 1082 strncmp(st->sparingIdent.ident, UDF_ID_SPARING, strlen(UDF_ID_SPARING))) 1083 { 1084 brelse(UDF_SB_TYPESPAR(sb,i).s_spar_map[j]); 1085 UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = NULL; 1086 } 1087 } 1088 } 1089 UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_spar15; 1090 } 1091 else 1092 { 1093 udf_debug("Unknown ident: %s\n", upm2->partIdent.ident); 1094 continue; 1095 } 1096 UDF_SB_PARTVSN(sb,i) = le16_to_cpu(upm2->volSeqNum); 1097 UDF_SB_PARTNUM(sb,i) = le16_to_cpu(upm2->partitionNum); 1098 } 1099 udf_debug("Partition (%d:%d) type %d on volume %d\n", 1100 i, UDF_SB_PARTNUM(sb,i), type, UDF_SB_PARTVSN(sb,i)); 1101 } 1102 1103 if (fileset) 1104 { 1105 long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]); 1106 1107 *fileset = lelb_to_cpu(la->extLocation); 1108 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", 1109 fileset->logicalBlockNum, 1110 fileset->partitionReferenceNum); 1111 } 1112 if (lvd->integritySeqExt.extLength) 1113 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); 1114 return 0; 1115 } 1116 1117 /* 1118 * udf_load_logicalvolint 1119 * 1120 */ 1121 static void 1122 udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc) 1123 { 1124 struct buffer_head *bh = NULL; 1125 uint16_t ident; 1126 1127 while (loc.extLength > 0 && 1128 (bh = udf_read_tagged(sb, loc.extLocation, 1129 loc.extLocation, &ident)) && 1130 ident == TAG_IDENT_LVID) 1131 { 1132 UDF_SB_LVIDBH(sb) = bh; 1133 1134 if (UDF_SB_LVID(sb)->nextIntegrityExt.extLength) 1135 udf_load_logicalvolint(sb, leea_to_cpu(UDF_SB_LVID(sb)->nextIntegrityExt)); 1136 1137 if (UDF_SB_LVIDBH(sb) != bh) 1138 brelse(bh); 1139 loc.extLength -= sb->s_blocksize; 1140 loc.extLocation ++; 1141 } 1142 if (UDF_SB_LVIDBH(sb) != bh) 1143 brelse(bh); 1144 } 1145 1146 /* 1147 * udf_process_sequence 1148 * 1149 * PURPOSE 1150 * Process a main/reserve volume descriptor sequence. 1151 * 1152 * PRE-CONDITIONS 1153 * sb Pointer to _locked_ superblock. 1154 * block First block of first extent of the sequence. 1155 * lastblock Lastblock of first extent of the sequence. 1156 * 1157 * HISTORY 1158 * July 1, 1997 - Andrew E. Mileski 1159 * Written, tested, and released. 1160 */ 1161 static int 1162 udf_process_sequence(struct super_block *sb, long block, long lastblock, kernel_lb_addr *fileset) 1163 { 1164 struct buffer_head *bh = NULL; 1165 struct udf_vds_record vds[VDS_POS_LENGTH]; 1166 struct generic_desc *gd; 1167 struct volDescPtr *vdp; 1168 int done=0; 1169 int i,j; 1170 uint32_t vdsn; 1171 uint16_t ident; 1172 long next_s = 0, next_e = 0; 1173 1174 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); 1175 1176 /* Read the main descriptor sequence */ 1177 for (;(!done && block <= lastblock); block++) 1178 { 1179 1180 bh = udf_read_tagged(sb, block, block, &ident); 1181 if (!bh) 1182 break; 1183 1184 /* Process each descriptor (ISO 13346 3/8.3-8.4) */ 1185 gd = (struct generic_desc *)bh->b_data; 1186 vdsn = le32_to_cpu(gd->volDescSeqNum); 1187 switch (ident) 1188 { 1189 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ 1190 if (vdsn >= vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum) 1191 { 1192 vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum = vdsn; 1193 vds[VDS_POS_PRIMARY_VOL_DESC].block = block; 1194 } 1195 break; 1196 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ 1197 if (vdsn >= vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum) 1198 { 1199 vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum = vdsn; 1200 vds[VDS_POS_VOL_DESC_PTR].block = block; 1201 1202 vdp = (struct volDescPtr *)bh->b_data; 1203 next_s = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation); 1204 next_e = le32_to_cpu(vdp->nextVolDescSeqExt.extLength); 1205 next_e = next_e >> sb->s_blocksize_bits; 1206 next_e += next_s; 1207 } 1208 break; 1209 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ 1210 if (vdsn >= vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum) 1211 { 1212 vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum = vdsn; 1213 vds[VDS_POS_IMP_USE_VOL_DESC].block = block; 1214 } 1215 break; 1216 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ 1217 if (!vds[VDS_POS_PARTITION_DESC].block) 1218 vds[VDS_POS_PARTITION_DESC].block = block; 1219 break; 1220 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ 1221 if (vdsn >= vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum) 1222 { 1223 vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum = vdsn; 1224 vds[VDS_POS_LOGICAL_VOL_DESC].block = block; 1225 } 1226 break; 1227 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ 1228 if (vdsn >= vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum) 1229 { 1230 vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum = vdsn; 1231 vds[VDS_POS_UNALLOC_SPACE_DESC].block = block; 1232 } 1233 break; 1234 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ 1235 vds[VDS_POS_TERMINATING_DESC].block = block; 1236 if (next_e) 1237 { 1238 block = next_s; 1239 lastblock = next_e; 1240 next_s = next_e = 0; 1241 } 1242 else 1243 done = 1; 1244 break; 1245 } 1246 brelse(bh); 1247 } 1248 for (i=0; i<VDS_POS_LENGTH; i++) 1249 { 1250 if (vds[i].block) 1251 { 1252 bh = udf_read_tagged(sb, vds[i].block, vds[i].block, &ident); 1253 1254 if (i == VDS_POS_PRIMARY_VOL_DESC) 1255 udf_load_pvoldesc(sb, bh); 1256 else if (i == VDS_POS_LOGICAL_VOL_DESC) 1257 udf_load_logicalvol(sb, bh, fileset); 1258 else if (i == VDS_POS_PARTITION_DESC) 1259 { 1260 struct buffer_head *bh2 = NULL; 1261 udf_load_partdesc(sb, bh); 1262 for (j=vds[i].block+1; j<vds[VDS_POS_TERMINATING_DESC].block; j++) 1263 { 1264 bh2 = udf_read_tagged(sb, j, j, &ident); 1265 gd = (struct generic_desc *)bh2->b_data; 1266 if (ident == TAG_IDENT_PD) 1267 udf_load_partdesc(sb, bh2); 1268 brelse(bh2); 1269 } 1270 } 1271 brelse(bh); 1272 } 1273 } 1274 1275 return 0; 1276 } 1277 1278 /* 1279 * udf_check_valid() 1280 */ 1281 static int 1282 udf_check_valid(struct super_block *sb, int novrs, int silent) 1283 { 1284 long block; 1285 1286 if (novrs) 1287 { 1288 udf_debug("Validity check skipped because of novrs option\n"); 1289 return 0; 1290 } 1291 /* Check that it is NSR02 compliant */ 1292 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ 1293 else if ((block = udf_vrs(sb, silent)) == -1) 1294 { 1295 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); 1296 if (!UDF_SB_LASTBLOCK(sb)) 1297 UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb); 1298 return 0; 1299 } 1300 else 1301 return !block; 1302 } 1303 1304 static int 1305 udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset) 1306 { 1307 struct anchorVolDescPtr *anchor; 1308 uint16_t ident; 1309 struct buffer_head *bh; 1310 long main_s, main_e, reserve_s, reserve_e; 1311 int i, j; 1312 1313 if (!sb) 1314 return 1; 1315 1316 for (i = 0; i < ARRAY_SIZE(UDF_SB_ANCHOR(sb)); i++) { 1317 if (UDF_SB_ANCHOR(sb)[i] && (bh = udf_read_tagged(sb, 1318 UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident))) 1319 { 1320 anchor = (struct anchorVolDescPtr *)bh->b_data; 1321 1322 /* Locate the main sequence */ 1323 main_s = le32_to_cpu( anchor->mainVolDescSeqExt.extLocation ); 1324 main_e = le32_to_cpu( anchor->mainVolDescSeqExt.extLength ); 1325 main_e = main_e >> sb->s_blocksize_bits; 1326 main_e += main_s; 1327 1328 /* Locate the reserve sequence */ 1329 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); 1330 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); 1331 reserve_e = reserve_e >> sb->s_blocksize_bits; 1332 reserve_e += reserve_s; 1333 1334 brelse(bh); 1335 1336 /* Process the main & reserve sequences */ 1337 /* responsible for finding the PartitionDesc(s) */ 1338 if (!(udf_process_sequence(sb, main_s, main_e, fileset) && 1339 udf_process_sequence(sb, reserve_s, reserve_e, fileset))) 1340 { 1341 break; 1342 } 1343 } 1344 } 1345 1346 if (i == ARRAY_SIZE(UDF_SB_ANCHOR(sb))) { 1347 udf_debug("No Anchor block found\n"); 1348 return 1; 1349 } else 1350 udf_debug("Using anchor in block %d\n", UDF_SB_ANCHOR(sb)[i]); 1351 1352 for (i=0; i<UDF_SB_NUMPARTS(sb); i++) 1353 { 1354 switch (UDF_SB_PARTTYPE(sb, i)) 1355 { 1356 case UDF_VIRTUAL_MAP15: 1357 case UDF_VIRTUAL_MAP20: 1358 { 1359 kernel_lb_addr uninitialized_var(ino); 1360 1361 if (!UDF_SB_LASTBLOCK(sb)) 1362 { 1363 UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb); 1364 udf_find_anchor(sb); 1365 } 1366 1367 if (!UDF_SB_LASTBLOCK(sb)) 1368 { 1369 udf_debug("Unable to determine Lastblock (For Virtual Partition)\n"); 1370 return 1; 1371 } 1372 1373 for (j=0; j<UDF_SB_NUMPARTS(sb); j++) 1374 { 1375 if (j != i && 1376 UDF_SB_PARTVSN(sb,i) == UDF_SB_PARTVSN(sb,j) && 1377 UDF_SB_PARTNUM(sb,i) == UDF_SB_PARTNUM(sb,j)) 1378 { 1379 ino.partitionReferenceNum = j; 1380 ino.logicalBlockNum = UDF_SB_LASTBLOCK(sb) - 1381 UDF_SB_PARTROOT(sb,j); 1382 break; 1383 } 1384 } 1385 1386 if (j == UDF_SB_NUMPARTS(sb)) 1387 return 1; 1388 1389 if (!(UDF_SB_VAT(sb) = udf_iget(sb, ino))) 1390 return 1; 1391 1392 if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP15) 1393 { 1394 UDF_SB_TYPEVIRT(sb,i).s_start_offset = udf_ext0_offset(UDF_SB_VAT(sb)); 1395 UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - 36) >> 2; 1396 } 1397 else if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP20) 1398 { 1399 struct buffer_head *bh = NULL; 1400 uint32_t pos; 1401 1402 pos = udf_block_map(UDF_SB_VAT(sb), 0); 1403 bh = sb_bread(sb, pos); 1404 if (!bh) 1405 return 1; 1406 UDF_SB_TYPEVIRT(sb,i).s_start_offset = 1407 le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data + udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) + 1408 udf_ext0_offset(UDF_SB_VAT(sb)); 1409 UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - 1410 UDF_SB_TYPEVIRT(sb,i).s_start_offset) >> 2; 1411 brelse(bh); 1412 } 1413 UDF_SB_PARTROOT(sb,i) = udf_get_pblock(sb, 0, i, 0); 1414 UDF_SB_PARTLEN(sb,i) = UDF_SB_PARTLEN(sb,ino.partitionReferenceNum); 1415 } 1416 } 1417 } 1418 return 0; 1419 } 1420 1421 static void udf_open_lvid(struct super_block *sb) 1422 { 1423 if (UDF_SB_LVIDBH(sb)) 1424 { 1425 int i; 1426 kernel_timestamp cpu_time; 1427 1428 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1429 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1430 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) 1431 UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time); 1432 UDF_SB_LVID(sb)->integrityType = LVID_INTEGRITY_TYPE_OPEN; 1433 1434 UDF_SB_LVID(sb)->descTag.descCRC = 1435 cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag), 1436 le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0)); 1437 1438 UDF_SB_LVID(sb)->descTag.tagChecksum = 0; 1439 for (i=0; i<16; i++) 1440 if (i != 4) 1441 UDF_SB_LVID(sb)->descTag.tagChecksum += 1442 ((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i]; 1443 1444 mark_buffer_dirty(UDF_SB_LVIDBH(sb)); 1445 } 1446 } 1447 1448 static void udf_close_lvid(struct super_block *sb) 1449 { 1450 if (UDF_SB_LVIDBH(sb) && 1451 UDF_SB_LVID(sb)->integrityType == LVID_INTEGRITY_TYPE_OPEN) 1452 { 1453 int i; 1454 kernel_timestamp cpu_time; 1455 1456 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1457 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1458 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) 1459 UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time); 1460 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev)) 1461 UDF_SB_LVIDIU(sb)->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); 1462 if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev)) 1463 UDF_SB_LVIDIU(sb)->minUDFReadRev = cpu_to_le16(UDF_SB_UDFREV(sb)); 1464 if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev)) 1465 UDF_SB_LVIDIU(sb)->minUDFWriteRev = cpu_to_le16(UDF_SB_UDFREV(sb)); 1466 UDF_SB_LVID(sb)->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); 1467 1468 UDF_SB_LVID(sb)->descTag.descCRC = 1469 cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag), 1470 le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0)); 1471 1472 UDF_SB_LVID(sb)->descTag.tagChecksum = 0; 1473 for (i=0; i<16; i++) 1474 if (i != 4) 1475 UDF_SB_LVID(sb)->descTag.tagChecksum += 1476 ((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i]; 1477 1478 mark_buffer_dirty(UDF_SB_LVIDBH(sb)); 1479 } 1480 } 1481 1482 /* 1483 * udf_read_super 1484 * 1485 * PURPOSE 1486 * Complete the specified super block. 1487 * 1488 * PRE-CONDITIONS 1489 * sb Pointer to superblock to complete - never NULL. 1490 * sb->s_dev Device to read suberblock from. 1491 * options Pointer to mount options. 1492 * silent Silent flag. 1493 * 1494 * HISTORY 1495 * July 1, 1997 - Andrew E. Mileski 1496 * Written, tested, and released. 1497 */ 1498 static int udf_fill_super(struct super_block *sb, void *options, int silent) 1499 { 1500 int i; 1501 struct inode *inode=NULL; 1502 struct udf_options uopt; 1503 kernel_lb_addr rootdir, fileset; 1504 struct udf_sb_info *sbi; 1505 1506 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); 1507 uopt.uid = -1; 1508 uopt.gid = -1; 1509 uopt.umask = 0; 1510 1511 sbi = kmalloc(sizeof(struct udf_sb_info), GFP_KERNEL); 1512 if (!sbi) 1513 return -ENOMEM; 1514 sb->s_fs_info = sbi; 1515 memset(UDF_SB(sb), 0x00, sizeof(struct udf_sb_info)); 1516 1517 mutex_init(&sbi->s_alloc_mutex); 1518 1519 if (!udf_parse_options((char *)options, &uopt)) 1520 goto error_out; 1521 1522 if (uopt.flags & (1 << UDF_FLAG_UTF8) && 1523 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) 1524 { 1525 udf_error(sb, "udf_read_super", 1526 "utf8 cannot be combined with iocharset\n"); 1527 goto error_out; 1528 } 1529 #ifdef CONFIG_UDF_NLS 1530 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) 1531 { 1532 uopt.nls_map = load_nls_default(); 1533 if (!uopt.nls_map) 1534 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); 1535 else 1536 udf_debug("Using default NLS map\n"); 1537 } 1538 #endif 1539 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) 1540 uopt.flags |= (1 << UDF_FLAG_UTF8); 1541 1542 fileset.logicalBlockNum = 0xFFFFFFFF; 1543 fileset.partitionReferenceNum = 0xFFFF; 1544 1545 UDF_SB(sb)->s_flags = uopt.flags; 1546 UDF_SB(sb)->s_uid = uopt.uid; 1547 UDF_SB(sb)->s_gid = uopt.gid; 1548 UDF_SB(sb)->s_umask = uopt.umask; 1549 UDF_SB(sb)->s_nls_map = uopt.nls_map; 1550 1551 /* Set the block size for all transfers */ 1552 if (!udf_set_blocksize(sb, uopt.blocksize)) 1553 goto error_out; 1554 1555 if ( uopt.session == 0xFFFFFFFF ) 1556 UDF_SB_SESSION(sb) = udf_get_last_session(sb); 1557 else 1558 UDF_SB_SESSION(sb) = uopt.session; 1559 1560 udf_debug("Multi-session=%d\n", UDF_SB_SESSION(sb)); 1561 1562 UDF_SB_LASTBLOCK(sb) = uopt.lastblock; 1563 UDF_SB_ANCHOR(sb)[0] = UDF_SB_ANCHOR(sb)[1] = 0; 1564 UDF_SB_ANCHOR(sb)[2] = uopt.anchor; 1565 UDF_SB_ANCHOR(sb)[3] = 256; 1566 1567 if (udf_check_valid(sb, uopt.novrs, silent)) /* read volume recognition sequences */ 1568 { 1569 printk("UDF-fs: No VRS found\n"); 1570 goto error_out; 1571 } 1572 1573 udf_find_anchor(sb); 1574 1575 /* Fill in the rest of the superblock */ 1576 sb->s_op = &udf_sb_ops; 1577 sb->dq_op = NULL; 1578 sb->s_dirt = 0; 1579 sb->s_magic = UDF_SUPER_MAGIC; 1580 sb->s_time_gran = 1000; 1581 1582 if (udf_load_partition(sb, &fileset)) 1583 { 1584 printk("UDF-fs: No partition found (1)\n"); 1585 goto error_out; 1586 } 1587 1588 udf_debug("Lastblock=%d\n", UDF_SB_LASTBLOCK(sb)); 1589 1590 if ( UDF_SB_LVIDBH(sb) ) 1591 { 1592 uint16_t minUDFReadRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev); 1593 uint16_t minUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev); 1594 /* uint16_t maxUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev); */ 1595 1596 if (minUDFReadRev > UDF_MAX_READ_VERSION) 1597 { 1598 printk("UDF-fs: minUDFReadRev=%x (max is %x)\n", 1599 le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev), 1600 UDF_MAX_READ_VERSION); 1601 goto error_out; 1602 } 1603 else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) 1604 { 1605 sb->s_flags |= MS_RDONLY; 1606 } 1607 1608 UDF_SB_UDFREV(sb) = minUDFWriteRev; 1609 1610 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) 1611 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); 1612 if (minUDFReadRev >= UDF_VERS_USE_STREAMS) 1613 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); 1614 } 1615 1616 if ( !UDF_SB_NUMPARTS(sb) ) 1617 { 1618 printk("UDF-fs: No partition found (2)\n"); 1619 goto error_out; 1620 } 1621 1622 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_READ_ONLY) { 1623 printk("UDF-fs: Partition marked readonly; forcing readonly mount\n"); 1624 sb->s_flags |= MS_RDONLY; 1625 } 1626 1627 if ( udf_find_fileset(sb, &fileset, &rootdir) ) 1628 { 1629 printk("UDF-fs: No fileset found\n"); 1630 goto error_out; 1631 } 1632 1633 if (!silent) 1634 { 1635 kernel_timestamp ts; 1636 udf_time_to_stamp(&ts, UDF_SB_RECORDTIME(sb)); 1637 udf_info("UDF %s (%s) Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", 1638 UDFFS_VERSION, UDFFS_DATE, 1639 UDF_SB_VOLIDENT(sb), ts.year, ts.month, ts.day, ts.hour, ts.minute, 1640 ts.typeAndTimezone); 1641 } 1642 if (!(sb->s_flags & MS_RDONLY)) 1643 udf_open_lvid(sb); 1644 1645 /* Assign the root inode */ 1646 /* assign inodes by physical block number */ 1647 /* perhaps it's not extensible enough, but for now ... */ 1648 inode = udf_iget(sb, rootdir); 1649 if (!inode) 1650 { 1651 printk("UDF-fs: Error in udf_iget, block=%d, partition=%d\n", 1652 rootdir.logicalBlockNum, rootdir.partitionReferenceNum); 1653 goto error_out; 1654 } 1655 1656 /* Allocate a dentry for the root inode */ 1657 sb->s_root = d_alloc_root(inode); 1658 if (!sb->s_root) 1659 { 1660 printk("UDF-fs: Couldn't allocate root dentry\n"); 1661 iput(inode); 1662 goto error_out; 1663 } 1664 sb->s_maxbytes = MAX_LFS_FILESIZE; 1665 return 0; 1666 1667 error_out: 1668 if (UDF_SB_VAT(sb)) 1669 iput(UDF_SB_VAT(sb)); 1670 if (UDF_SB_NUMPARTS(sb)) 1671 { 1672 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) 1673 iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table); 1674 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) 1675 iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table); 1676 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) 1677 UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace); 1678 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) 1679 UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace); 1680 if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15) 1681 { 1682 for (i=0; i<4; i++) 1683 brelse(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]); 1684 } 1685 } 1686 #ifdef CONFIG_UDF_NLS 1687 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 1688 unload_nls(UDF_SB(sb)->s_nls_map); 1689 #endif 1690 if (!(sb->s_flags & MS_RDONLY)) 1691 udf_close_lvid(sb); 1692 brelse(UDF_SB_LVIDBH(sb)); 1693 UDF_SB_FREE(sb); 1694 kfree(sbi); 1695 sb->s_fs_info = NULL; 1696 return -EINVAL; 1697 } 1698 1699 void udf_error(struct super_block *sb, const char *function, 1700 const char *fmt, ...) 1701 { 1702 va_list args; 1703 1704 if (!(sb->s_flags & MS_RDONLY)) 1705 { 1706 /* mark sb error */ 1707 sb->s_dirt = 1; 1708 } 1709 va_start(args, fmt); 1710 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 1711 va_end(args); 1712 printk (KERN_CRIT "UDF-fs error (device %s): %s: %s\n", 1713 sb->s_id, function, error_buf); 1714 } 1715 1716 void udf_warning(struct super_block *sb, const char *function, 1717 const char *fmt, ...) 1718 { 1719 va_list args; 1720 1721 va_start (args, fmt); 1722 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 1723 va_end(args); 1724 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", 1725 sb->s_id, function, error_buf); 1726 } 1727 1728 /* 1729 * udf_put_super 1730 * 1731 * PURPOSE 1732 * Prepare for destruction of the superblock. 1733 * 1734 * DESCRIPTION 1735 * Called before the filesystem is unmounted. 1736 * 1737 * HISTORY 1738 * July 1, 1997 - Andrew E. Mileski 1739 * Written, tested, and released. 1740 */ 1741 static void 1742 udf_put_super(struct super_block *sb) 1743 { 1744 int i; 1745 1746 if (UDF_SB_VAT(sb)) 1747 iput(UDF_SB_VAT(sb)); 1748 if (UDF_SB_NUMPARTS(sb)) 1749 { 1750 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) 1751 iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table); 1752 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) 1753 iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table); 1754 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) 1755 UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace); 1756 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) 1757 UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace); 1758 if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15) 1759 { 1760 for (i=0; i<4; i++) 1761 brelse(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]); 1762 } 1763 } 1764 #ifdef CONFIG_UDF_NLS 1765 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 1766 unload_nls(UDF_SB(sb)->s_nls_map); 1767 #endif 1768 if (!(sb->s_flags & MS_RDONLY)) 1769 udf_close_lvid(sb); 1770 brelse(UDF_SB_LVIDBH(sb)); 1771 UDF_SB_FREE(sb); 1772 kfree(sb->s_fs_info); 1773 sb->s_fs_info = NULL; 1774 } 1775 1776 /* 1777 * udf_stat_fs 1778 * 1779 * PURPOSE 1780 * Return info about the filesystem. 1781 * 1782 * DESCRIPTION 1783 * Called by sys_statfs() 1784 * 1785 * HISTORY 1786 * July 1, 1997 - Andrew E. Mileski 1787 * Written, tested, and released. 1788 */ 1789 static int 1790 udf_statfs(struct dentry *dentry, struct kstatfs *buf) 1791 { 1792 struct super_block *sb = dentry->d_sb; 1793 1794 buf->f_type = UDF_SUPER_MAGIC; 1795 buf->f_bsize = sb->s_blocksize; 1796 buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb)); 1797 buf->f_bfree = udf_count_free(sb); 1798 buf->f_bavail = buf->f_bfree; 1799 buf->f_files = (UDF_SB_LVIDBH(sb) ? 1800 (le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1801 le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs)) : 0) + buf->f_bfree; 1802 buf->f_ffree = buf->f_bfree; 1803 /* __kernel_fsid_t f_fsid */ 1804 buf->f_namelen = UDF_NAME_LEN-2; 1805 1806 return 0; 1807 } 1808 1809 static unsigned char udf_bitmap_lookup[16] = { 1810 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 1811 }; 1812 1813 static unsigned int 1814 udf_count_free_bitmap(struct super_block *sb, struct udf_bitmap *bitmap) 1815 { 1816 struct buffer_head *bh = NULL; 1817 unsigned int accum = 0; 1818 int index; 1819 int block = 0, newblock; 1820 kernel_lb_addr loc; 1821 uint32_t bytes; 1822 uint8_t value; 1823 uint8_t *ptr; 1824 uint16_t ident; 1825 struct spaceBitmapDesc *bm; 1826 1827 lock_kernel(); 1828 1829 loc.logicalBlockNum = bitmap->s_extPosition; 1830 loc.partitionReferenceNum = UDF_SB_PARTITION(sb); 1831 bh = udf_read_ptagged(sb, loc, 0, &ident); 1832 1833 if (!bh) 1834 { 1835 printk(KERN_ERR "udf: udf_count_free failed\n"); 1836 goto out; 1837 } 1838 else if (ident != TAG_IDENT_SBD) 1839 { 1840 brelse(bh); 1841 printk(KERN_ERR "udf: udf_count_free failed\n"); 1842 goto out; 1843 } 1844 1845 bm = (struct spaceBitmapDesc *)bh->b_data; 1846 bytes = le32_to_cpu(bm->numOfBytes); 1847 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ 1848 ptr = (uint8_t *)bh->b_data; 1849 1850 while ( bytes > 0 ) 1851 { 1852 while ((bytes > 0) && (index < sb->s_blocksize)) 1853 { 1854 value = ptr[index]; 1855 accum += udf_bitmap_lookup[ value & 0x0f ]; 1856 accum += udf_bitmap_lookup[ value >> 4 ]; 1857 index++; 1858 bytes--; 1859 } 1860 if ( bytes ) 1861 { 1862 brelse(bh); 1863 newblock = udf_get_lb_pblock(sb, loc, ++block); 1864 bh = udf_tread(sb, newblock); 1865 if (!bh) 1866 { 1867 udf_debug("read failed\n"); 1868 goto out; 1869 } 1870 index = 0; 1871 ptr = (uint8_t *)bh->b_data; 1872 } 1873 } 1874 brelse(bh); 1875 1876 out: 1877 unlock_kernel(); 1878 1879 return accum; 1880 } 1881 1882 static unsigned int 1883 udf_count_free_table(struct super_block *sb, struct inode * table) 1884 { 1885 unsigned int accum = 0; 1886 uint32_t elen; 1887 kernel_lb_addr eloc; 1888 int8_t etype; 1889 struct extent_position epos; 1890 1891 lock_kernel(); 1892 1893 epos.block = UDF_I_LOCATION(table); 1894 epos.offset = sizeof(struct unallocSpaceEntry); 1895 epos.bh = NULL; 1896 1897 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) 1898 accum += (elen >> table->i_sb->s_blocksize_bits); 1899 brelse(epos.bh); 1900 1901 unlock_kernel(); 1902 1903 return accum; 1904 } 1905 1906 static unsigned int 1907 udf_count_free(struct super_block *sb) 1908 { 1909 unsigned int accum = 0; 1910 1911 if (UDF_SB_LVIDBH(sb)) 1912 { 1913 if (le32_to_cpu(UDF_SB_LVID(sb)->numOfPartitions) > UDF_SB_PARTITION(sb)) 1914 { 1915 accum = le32_to_cpu(UDF_SB_LVID(sb)->freeSpaceTable[UDF_SB_PARTITION(sb)]); 1916 1917 if (accum == 0xFFFFFFFF) 1918 accum = 0; 1919 } 1920 } 1921 1922 if (accum) 1923 return accum; 1924 1925 if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) 1926 { 1927 accum += udf_count_free_bitmap(sb, 1928 UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap); 1929 } 1930 if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) 1931 { 1932 accum += udf_count_free_bitmap(sb, 1933 UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap); 1934 } 1935 if (accum) 1936 return accum; 1937 1938 if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) 1939 { 1940 accum += udf_count_free_table(sb, 1941 UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table); 1942 } 1943 if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) 1944 { 1945 accum += udf_count_free_table(sb, 1946 UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table); 1947 } 1948 1949 return accum; 1950 } 1951