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