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 37 * vol descs. 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 <linux/errno.h> 56 #include <linux/mount.h> 57 #include <linux/seq_file.h> 58 #include <linux/bitmap.h> 59 #include <linux/crc-itu-t.h> 60 #include <asm/byteorder.h> 61 62 #include "udf_sb.h" 63 #include "udf_i.h" 64 65 #include <linux/init.h> 66 #include <asm/uaccess.h> 67 68 #define VDS_POS_PRIMARY_VOL_DESC 0 69 #define VDS_POS_UNALLOC_SPACE_DESC 1 70 #define VDS_POS_LOGICAL_VOL_DESC 2 71 #define VDS_POS_PARTITION_DESC 3 72 #define VDS_POS_IMP_USE_VOL_DESC 4 73 #define VDS_POS_VOL_DESC_PTR 5 74 #define VDS_POS_TERMINATING_DESC 6 75 #define VDS_POS_LENGTH 7 76 77 #define UDF_DEFAULT_BLOCKSIZE 2048 78 79 static char error_buf[1024]; 80 81 /* These are the "meat" - everything else is stuffing */ 82 static int udf_fill_super(struct super_block *, void *, int); 83 static void udf_put_super(struct super_block *); 84 static int udf_sync_fs(struct super_block *, int); 85 static int udf_remount_fs(struct super_block *, int *, char *); 86 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); 87 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, 88 struct kernel_lb_addr *); 89 static void udf_load_fileset(struct super_block *, struct buffer_head *, 90 struct kernel_lb_addr *); 91 static void udf_open_lvid(struct super_block *); 92 static void udf_close_lvid(struct super_block *); 93 static unsigned int udf_count_free(struct super_block *); 94 static int udf_statfs(struct dentry *, struct kstatfs *); 95 static int udf_show_options(struct seq_file *, struct vfsmount *); 96 static void udf_error(struct super_block *sb, const char *function, 97 const char *fmt, ...); 98 99 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) 100 { 101 struct logicalVolIntegrityDesc *lvid = 102 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; 103 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); 104 __u32 offset = number_of_partitions * 2 * 105 sizeof(uint32_t)/sizeof(uint8_t); 106 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); 107 } 108 109 /* UDF filesystem type */ 110 static struct dentry *udf_mount(struct file_system_type *fs_type, 111 int flags, const char *dev_name, void *data) 112 { 113 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); 114 } 115 116 static struct file_system_type udf_fstype = { 117 .owner = THIS_MODULE, 118 .name = "udf", 119 .mount = udf_mount, 120 .kill_sb = kill_block_super, 121 .fs_flags = FS_REQUIRES_DEV, 122 }; 123 124 static struct kmem_cache *udf_inode_cachep; 125 126 static struct inode *udf_alloc_inode(struct super_block *sb) 127 { 128 struct udf_inode_info *ei; 129 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); 130 if (!ei) 131 return NULL; 132 133 ei->i_unique = 0; 134 ei->i_lenExtents = 0; 135 ei->i_next_alloc_block = 0; 136 ei->i_next_alloc_goal = 0; 137 ei->i_strat4096 = 0; 138 139 return &ei->vfs_inode; 140 } 141 142 static void udf_destroy_inode(struct inode *inode) 143 { 144 kmem_cache_free(udf_inode_cachep, UDF_I(inode)); 145 } 146 147 static void init_once(void *foo) 148 { 149 struct udf_inode_info *ei = (struct udf_inode_info *)foo; 150 151 ei->i_ext.i_data = NULL; 152 inode_init_once(&ei->vfs_inode); 153 } 154 155 static int init_inodecache(void) 156 { 157 udf_inode_cachep = kmem_cache_create("udf_inode_cache", 158 sizeof(struct udf_inode_info), 159 0, (SLAB_RECLAIM_ACCOUNT | 160 SLAB_MEM_SPREAD), 161 init_once); 162 if (!udf_inode_cachep) 163 return -ENOMEM; 164 return 0; 165 } 166 167 static void destroy_inodecache(void) 168 { 169 kmem_cache_destroy(udf_inode_cachep); 170 } 171 172 /* Superblock operations */ 173 static const struct super_operations udf_sb_ops = { 174 .alloc_inode = udf_alloc_inode, 175 .destroy_inode = udf_destroy_inode, 176 .write_inode = udf_write_inode, 177 .evict_inode = udf_evict_inode, 178 .put_super = udf_put_super, 179 .sync_fs = udf_sync_fs, 180 .statfs = udf_statfs, 181 .remount_fs = udf_remount_fs, 182 .show_options = udf_show_options, 183 }; 184 185 struct udf_options { 186 unsigned char novrs; 187 unsigned int blocksize; 188 unsigned int session; 189 unsigned int lastblock; 190 unsigned int anchor; 191 unsigned int volume; 192 unsigned short partition; 193 unsigned int fileset; 194 unsigned int rootdir; 195 unsigned int flags; 196 mode_t umask; 197 gid_t gid; 198 uid_t uid; 199 mode_t fmode; 200 mode_t dmode; 201 struct nls_table *nls_map; 202 }; 203 204 static int __init init_udf_fs(void) 205 { 206 int err; 207 208 err = init_inodecache(); 209 if (err) 210 goto out1; 211 err = register_filesystem(&udf_fstype); 212 if (err) 213 goto out; 214 215 return 0; 216 217 out: 218 destroy_inodecache(); 219 220 out1: 221 return err; 222 } 223 224 static void __exit exit_udf_fs(void) 225 { 226 unregister_filesystem(&udf_fstype); 227 destroy_inodecache(); 228 } 229 230 module_init(init_udf_fs) 231 module_exit(exit_udf_fs) 232 233 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) 234 { 235 struct udf_sb_info *sbi = UDF_SB(sb); 236 237 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), 238 GFP_KERNEL); 239 if (!sbi->s_partmaps) { 240 udf_error(sb, __func__, 241 "Unable to allocate space for %d partition maps", 242 count); 243 sbi->s_partitions = 0; 244 return -ENOMEM; 245 } 246 247 sbi->s_partitions = count; 248 return 0; 249 } 250 251 static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt) 252 { 253 struct super_block *sb = mnt->mnt_sb; 254 struct udf_sb_info *sbi = UDF_SB(sb); 255 256 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) 257 seq_puts(seq, ",nostrict"); 258 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) 259 seq_printf(seq, ",bs=%lu", sb->s_blocksize); 260 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) 261 seq_puts(seq, ",unhide"); 262 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) 263 seq_puts(seq, ",undelete"); 264 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) 265 seq_puts(seq, ",noadinicb"); 266 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) 267 seq_puts(seq, ",shortad"); 268 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) 269 seq_puts(seq, ",uid=forget"); 270 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) 271 seq_puts(seq, ",uid=ignore"); 272 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) 273 seq_puts(seq, ",gid=forget"); 274 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) 275 seq_puts(seq, ",gid=ignore"); 276 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) 277 seq_printf(seq, ",uid=%u", sbi->s_uid); 278 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) 279 seq_printf(seq, ",gid=%u", sbi->s_gid); 280 if (sbi->s_umask != 0) 281 seq_printf(seq, ",umask=%o", sbi->s_umask); 282 if (sbi->s_fmode != UDF_INVALID_MODE) 283 seq_printf(seq, ",mode=%o", sbi->s_fmode); 284 if (sbi->s_dmode != UDF_INVALID_MODE) 285 seq_printf(seq, ",dmode=%o", sbi->s_dmode); 286 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) 287 seq_printf(seq, ",session=%u", sbi->s_session); 288 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) 289 seq_printf(seq, ",lastblock=%u", sbi->s_last_block); 290 if (sbi->s_anchor != 0) 291 seq_printf(seq, ",anchor=%u", sbi->s_anchor); 292 /* 293 * volume, partition, fileset and rootdir seem to be ignored 294 * currently 295 */ 296 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) 297 seq_puts(seq, ",utf8"); 298 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) 299 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); 300 301 return 0; 302 } 303 304 /* 305 * udf_parse_options 306 * 307 * PURPOSE 308 * Parse mount options. 309 * 310 * DESCRIPTION 311 * The following mount options are supported: 312 * 313 * gid= Set the default group. 314 * umask= Set the default umask. 315 * mode= Set the default file permissions. 316 * dmode= Set the default directory permissions. 317 * uid= Set the default user. 318 * bs= Set the block size. 319 * unhide Show otherwise hidden files. 320 * undelete Show deleted files in lists. 321 * adinicb Embed data in the inode (default) 322 * noadinicb Don't embed data in the inode 323 * shortad Use short ad's 324 * longad Use long ad's (default) 325 * nostrict Unset strict conformance 326 * iocharset= Set the NLS character set 327 * 328 * The remaining are for debugging and disaster recovery: 329 * 330 * novrs Skip volume sequence recognition 331 * 332 * The following expect a offset from 0. 333 * 334 * session= Set the CDROM session (default= last session) 335 * anchor= Override standard anchor location. (default= 256) 336 * volume= Override the VolumeDesc location. (unused) 337 * partition= Override the PartitionDesc location. (unused) 338 * lastblock= Set the last block of the filesystem/ 339 * 340 * The following expect a offset from the partition root. 341 * 342 * fileset= Override the fileset block location. (unused) 343 * rootdir= Override the root directory location. (unused) 344 * WARNING: overriding the rootdir to a non-directory may 345 * yield highly unpredictable results. 346 * 347 * PRE-CONDITIONS 348 * options Pointer to mount options string. 349 * uopts Pointer to mount options variable. 350 * 351 * POST-CONDITIONS 352 * <return> 1 Mount options parsed okay. 353 * <return> 0 Error parsing mount options. 354 * 355 * HISTORY 356 * July 1, 1997 - Andrew E. Mileski 357 * Written, tested, and released. 358 */ 359 360 enum { 361 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, 362 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, 363 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, 364 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, 365 Opt_rootdir, Opt_utf8, Opt_iocharset, 366 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, 367 Opt_fmode, Opt_dmode 368 }; 369 370 static const match_table_t tokens = { 371 {Opt_novrs, "novrs"}, 372 {Opt_nostrict, "nostrict"}, 373 {Opt_bs, "bs=%u"}, 374 {Opt_unhide, "unhide"}, 375 {Opt_undelete, "undelete"}, 376 {Opt_noadinicb, "noadinicb"}, 377 {Opt_adinicb, "adinicb"}, 378 {Opt_shortad, "shortad"}, 379 {Opt_longad, "longad"}, 380 {Opt_uforget, "uid=forget"}, 381 {Opt_uignore, "uid=ignore"}, 382 {Opt_gforget, "gid=forget"}, 383 {Opt_gignore, "gid=ignore"}, 384 {Opt_gid, "gid=%u"}, 385 {Opt_uid, "uid=%u"}, 386 {Opt_umask, "umask=%o"}, 387 {Opt_session, "session=%u"}, 388 {Opt_lastblock, "lastblock=%u"}, 389 {Opt_anchor, "anchor=%u"}, 390 {Opt_volume, "volume=%u"}, 391 {Opt_partition, "partition=%u"}, 392 {Opt_fileset, "fileset=%u"}, 393 {Opt_rootdir, "rootdir=%u"}, 394 {Opt_utf8, "utf8"}, 395 {Opt_iocharset, "iocharset=%s"}, 396 {Opt_fmode, "mode=%o"}, 397 {Opt_dmode, "dmode=%o"}, 398 {Opt_err, NULL} 399 }; 400 401 static int udf_parse_options(char *options, struct udf_options *uopt, 402 bool remount) 403 { 404 char *p; 405 int option; 406 407 uopt->novrs = 0; 408 uopt->partition = 0xFFFF; 409 uopt->session = 0xFFFFFFFF; 410 uopt->lastblock = 0; 411 uopt->anchor = 0; 412 uopt->volume = 0xFFFFFFFF; 413 uopt->rootdir = 0xFFFFFFFF; 414 uopt->fileset = 0xFFFFFFFF; 415 uopt->nls_map = NULL; 416 417 if (!options) 418 return 1; 419 420 while ((p = strsep(&options, ",")) != NULL) { 421 substring_t args[MAX_OPT_ARGS]; 422 int token; 423 if (!*p) 424 continue; 425 426 token = match_token(p, tokens, args); 427 switch (token) { 428 case Opt_novrs: 429 uopt->novrs = 1; 430 break; 431 case Opt_bs: 432 if (match_int(&args[0], &option)) 433 return 0; 434 uopt->blocksize = option; 435 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); 436 break; 437 case Opt_unhide: 438 uopt->flags |= (1 << UDF_FLAG_UNHIDE); 439 break; 440 case Opt_undelete: 441 uopt->flags |= (1 << UDF_FLAG_UNDELETE); 442 break; 443 case Opt_noadinicb: 444 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); 445 break; 446 case Opt_adinicb: 447 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); 448 break; 449 case Opt_shortad: 450 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); 451 break; 452 case Opt_longad: 453 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); 454 break; 455 case Opt_gid: 456 if (match_int(args, &option)) 457 return 0; 458 uopt->gid = option; 459 uopt->flags |= (1 << UDF_FLAG_GID_SET); 460 break; 461 case Opt_uid: 462 if (match_int(args, &option)) 463 return 0; 464 uopt->uid = option; 465 uopt->flags |= (1 << UDF_FLAG_UID_SET); 466 break; 467 case Opt_umask: 468 if (match_octal(args, &option)) 469 return 0; 470 uopt->umask = option; 471 break; 472 case Opt_nostrict: 473 uopt->flags &= ~(1 << UDF_FLAG_STRICT); 474 break; 475 case Opt_session: 476 if (match_int(args, &option)) 477 return 0; 478 uopt->session = option; 479 if (!remount) 480 uopt->flags |= (1 << UDF_FLAG_SESSION_SET); 481 break; 482 case Opt_lastblock: 483 if (match_int(args, &option)) 484 return 0; 485 uopt->lastblock = option; 486 if (!remount) 487 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); 488 break; 489 case Opt_anchor: 490 if (match_int(args, &option)) 491 return 0; 492 uopt->anchor = option; 493 break; 494 case Opt_volume: 495 if (match_int(args, &option)) 496 return 0; 497 uopt->volume = option; 498 break; 499 case Opt_partition: 500 if (match_int(args, &option)) 501 return 0; 502 uopt->partition = option; 503 break; 504 case Opt_fileset: 505 if (match_int(args, &option)) 506 return 0; 507 uopt->fileset = option; 508 break; 509 case Opt_rootdir: 510 if (match_int(args, &option)) 511 return 0; 512 uopt->rootdir = option; 513 break; 514 case Opt_utf8: 515 uopt->flags |= (1 << UDF_FLAG_UTF8); 516 break; 517 #ifdef CONFIG_UDF_NLS 518 case Opt_iocharset: 519 uopt->nls_map = load_nls(args[0].from); 520 uopt->flags |= (1 << UDF_FLAG_NLS_MAP); 521 break; 522 #endif 523 case Opt_uignore: 524 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); 525 break; 526 case Opt_uforget: 527 uopt->flags |= (1 << UDF_FLAG_UID_FORGET); 528 break; 529 case Opt_gignore: 530 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); 531 break; 532 case Opt_gforget: 533 uopt->flags |= (1 << UDF_FLAG_GID_FORGET); 534 break; 535 case Opt_fmode: 536 if (match_octal(args, &option)) 537 return 0; 538 uopt->fmode = option & 0777; 539 break; 540 case Opt_dmode: 541 if (match_octal(args, &option)) 542 return 0; 543 uopt->dmode = option & 0777; 544 break; 545 default: 546 printk(KERN_ERR "udf: bad mount option \"%s\" " 547 "or missing value\n", p); 548 return 0; 549 } 550 } 551 return 1; 552 } 553 554 static int udf_remount_fs(struct super_block *sb, int *flags, char *options) 555 { 556 struct udf_options uopt; 557 struct udf_sb_info *sbi = UDF_SB(sb); 558 int error = 0; 559 560 uopt.flags = sbi->s_flags; 561 uopt.uid = sbi->s_uid; 562 uopt.gid = sbi->s_gid; 563 uopt.umask = sbi->s_umask; 564 uopt.fmode = sbi->s_fmode; 565 uopt.dmode = sbi->s_dmode; 566 567 if (!udf_parse_options(options, &uopt, true)) 568 return -EINVAL; 569 570 lock_kernel(); 571 sbi->s_flags = uopt.flags; 572 sbi->s_uid = uopt.uid; 573 sbi->s_gid = uopt.gid; 574 sbi->s_umask = uopt.umask; 575 sbi->s_fmode = uopt.fmode; 576 sbi->s_dmode = uopt.dmode; 577 578 if (sbi->s_lvid_bh) { 579 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); 580 if (write_rev > UDF_MAX_WRITE_VERSION) 581 *flags |= MS_RDONLY; 582 } 583 584 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 585 goto out_unlock; 586 587 if (*flags & MS_RDONLY) 588 udf_close_lvid(sb); 589 else 590 udf_open_lvid(sb); 591 592 out_unlock: 593 unlock_kernel(); 594 return error; 595 } 596 597 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ 598 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ 599 static loff_t udf_check_vsd(struct super_block *sb) 600 { 601 struct volStructDesc *vsd = NULL; 602 loff_t sector = 32768; 603 int sectorsize; 604 struct buffer_head *bh = NULL; 605 int nsr02 = 0; 606 int nsr03 = 0; 607 struct udf_sb_info *sbi; 608 609 sbi = UDF_SB(sb); 610 if (sb->s_blocksize < sizeof(struct volStructDesc)) 611 sectorsize = sizeof(struct volStructDesc); 612 else 613 sectorsize = sb->s_blocksize; 614 615 sector += (sbi->s_session << sb->s_blocksize_bits); 616 617 udf_debug("Starting at sector %u (%ld byte sectors)\n", 618 (unsigned int)(sector >> sb->s_blocksize_bits), 619 sb->s_blocksize); 620 /* Process the sequence (if applicable) */ 621 for (; !nsr02 && !nsr03; sector += sectorsize) { 622 /* Read a block */ 623 bh = udf_tread(sb, sector >> sb->s_blocksize_bits); 624 if (!bh) 625 break; 626 627 /* Look for ISO descriptors */ 628 vsd = (struct volStructDesc *)(bh->b_data + 629 (sector & (sb->s_blocksize - 1))); 630 631 if (vsd->stdIdent[0] == 0) { 632 brelse(bh); 633 break; 634 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, 635 VSD_STD_ID_LEN)) { 636 switch (vsd->structType) { 637 case 0: 638 udf_debug("ISO9660 Boot Record found\n"); 639 break; 640 case 1: 641 udf_debug("ISO9660 Primary Volume Descriptor " 642 "found\n"); 643 break; 644 case 2: 645 udf_debug("ISO9660 Supplementary Volume " 646 "Descriptor found\n"); 647 break; 648 case 3: 649 udf_debug("ISO9660 Volume Partition Descriptor " 650 "found\n"); 651 break; 652 case 255: 653 udf_debug("ISO9660 Volume Descriptor Set " 654 "Terminator found\n"); 655 break; 656 default: 657 udf_debug("ISO9660 VRS (%u) found\n", 658 vsd->structType); 659 break; 660 } 661 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, 662 VSD_STD_ID_LEN)) 663 ; /* nothing */ 664 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, 665 VSD_STD_ID_LEN)) { 666 brelse(bh); 667 break; 668 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, 669 VSD_STD_ID_LEN)) 670 nsr02 = sector; 671 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, 672 VSD_STD_ID_LEN)) 673 nsr03 = sector; 674 brelse(bh); 675 } 676 677 if (nsr03) 678 return nsr03; 679 else if (nsr02) 680 return nsr02; 681 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) 682 return -1; 683 else 684 return 0; 685 } 686 687 static int udf_find_fileset(struct super_block *sb, 688 struct kernel_lb_addr *fileset, 689 struct kernel_lb_addr *root) 690 { 691 struct buffer_head *bh = NULL; 692 long lastblock; 693 uint16_t ident; 694 struct udf_sb_info *sbi; 695 696 if (fileset->logicalBlockNum != 0xFFFFFFFF || 697 fileset->partitionReferenceNum != 0xFFFF) { 698 bh = udf_read_ptagged(sb, fileset, 0, &ident); 699 700 if (!bh) { 701 return 1; 702 } else if (ident != TAG_IDENT_FSD) { 703 brelse(bh); 704 return 1; 705 } 706 707 } 708 709 sbi = UDF_SB(sb); 710 if (!bh) { 711 /* Search backwards through the partitions */ 712 struct kernel_lb_addr newfileset; 713 714 /* --> cvg: FIXME - is it reasonable? */ 715 return 1; 716 717 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; 718 (newfileset.partitionReferenceNum != 0xFFFF && 719 fileset->logicalBlockNum == 0xFFFFFFFF && 720 fileset->partitionReferenceNum == 0xFFFF); 721 newfileset.partitionReferenceNum--) { 722 lastblock = sbi->s_partmaps 723 [newfileset.partitionReferenceNum] 724 .s_partition_len; 725 newfileset.logicalBlockNum = 0; 726 727 do { 728 bh = udf_read_ptagged(sb, &newfileset, 0, 729 &ident); 730 if (!bh) { 731 newfileset.logicalBlockNum++; 732 continue; 733 } 734 735 switch (ident) { 736 case TAG_IDENT_SBD: 737 { 738 struct spaceBitmapDesc *sp; 739 sp = (struct spaceBitmapDesc *) 740 bh->b_data; 741 newfileset.logicalBlockNum += 1 + 742 ((le32_to_cpu(sp->numOfBytes) + 743 sizeof(struct spaceBitmapDesc) 744 - 1) >> sb->s_blocksize_bits); 745 brelse(bh); 746 break; 747 } 748 case TAG_IDENT_FSD: 749 *fileset = newfileset; 750 break; 751 default: 752 newfileset.logicalBlockNum++; 753 brelse(bh); 754 bh = NULL; 755 break; 756 } 757 } while (newfileset.logicalBlockNum < lastblock && 758 fileset->logicalBlockNum == 0xFFFFFFFF && 759 fileset->partitionReferenceNum == 0xFFFF); 760 } 761 } 762 763 if ((fileset->logicalBlockNum != 0xFFFFFFFF || 764 fileset->partitionReferenceNum != 0xFFFF) && bh) { 765 udf_debug("Fileset at block=%d, partition=%d\n", 766 fileset->logicalBlockNum, 767 fileset->partitionReferenceNum); 768 769 sbi->s_partition = fileset->partitionReferenceNum; 770 udf_load_fileset(sb, bh, root); 771 brelse(bh); 772 return 0; 773 } 774 return 1; 775 } 776 777 static int udf_load_pvoldesc(struct super_block *sb, sector_t block) 778 { 779 struct primaryVolDesc *pvoldesc; 780 struct ustr *instr, *outstr; 781 struct buffer_head *bh; 782 uint16_t ident; 783 int ret = 1; 784 785 instr = kmalloc(sizeof(struct ustr), GFP_NOFS); 786 if (!instr) 787 return 1; 788 789 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); 790 if (!outstr) 791 goto out1; 792 793 bh = udf_read_tagged(sb, block, block, &ident); 794 if (!bh) 795 goto out2; 796 797 BUG_ON(ident != TAG_IDENT_PVD); 798 799 pvoldesc = (struct primaryVolDesc *)bh->b_data; 800 801 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, 802 pvoldesc->recordingDateAndTime)) { 803 #ifdef UDFFS_DEBUG 804 struct timestamp *ts = &pvoldesc->recordingDateAndTime; 805 udf_debug("recording time %04u/%02u/%02u" 806 " %02u:%02u (%x)\n", 807 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, 808 ts->minute, le16_to_cpu(ts->typeAndTimezone)); 809 #endif 810 } 811 812 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) 813 if (udf_CS0toUTF8(outstr, instr)) { 814 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, 815 outstr->u_len > 31 ? 31 : outstr->u_len); 816 udf_debug("volIdent[] = '%s'\n", 817 UDF_SB(sb)->s_volume_ident); 818 } 819 820 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) 821 if (udf_CS0toUTF8(outstr, instr)) 822 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); 823 824 brelse(bh); 825 ret = 0; 826 out2: 827 kfree(outstr); 828 out1: 829 kfree(instr); 830 return ret; 831 } 832 833 static int udf_load_metadata_files(struct super_block *sb, int partition) 834 { 835 struct udf_sb_info *sbi = UDF_SB(sb); 836 struct udf_part_map *map; 837 struct udf_meta_data *mdata; 838 struct kernel_lb_addr addr; 839 int fe_error = 0; 840 841 map = &sbi->s_partmaps[partition]; 842 mdata = &map->s_type_specific.s_metadata; 843 844 /* metadata address */ 845 addr.logicalBlockNum = mdata->s_meta_file_loc; 846 addr.partitionReferenceNum = map->s_partition_num; 847 848 udf_debug("Metadata file location: block = %d part = %d\n", 849 addr.logicalBlockNum, addr.partitionReferenceNum); 850 851 mdata->s_metadata_fe = udf_iget(sb, &addr); 852 853 if (mdata->s_metadata_fe == NULL) { 854 udf_warning(sb, __func__, "metadata inode efe not found, " 855 "will try mirror inode."); 856 fe_error = 1; 857 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type != 858 ICBTAG_FLAG_AD_SHORT) { 859 udf_warning(sb, __func__, "metadata inode efe does not have " 860 "short allocation descriptors!"); 861 fe_error = 1; 862 iput(mdata->s_metadata_fe); 863 mdata->s_metadata_fe = NULL; 864 } 865 866 /* mirror file entry */ 867 addr.logicalBlockNum = mdata->s_mirror_file_loc; 868 addr.partitionReferenceNum = map->s_partition_num; 869 870 udf_debug("Mirror metadata file location: block = %d part = %d\n", 871 addr.logicalBlockNum, addr.partitionReferenceNum); 872 873 mdata->s_mirror_fe = udf_iget(sb, &addr); 874 875 if (mdata->s_mirror_fe == NULL) { 876 if (fe_error) { 877 udf_error(sb, __func__, "mirror inode efe not found " 878 "and metadata inode is missing too, exiting..."); 879 goto error_exit; 880 } else 881 udf_warning(sb, __func__, "mirror inode efe not found," 882 " but metadata inode is OK"); 883 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type != 884 ICBTAG_FLAG_AD_SHORT) { 885 udf_warning(sb, __func__, "mirror inode efe does not have " 886 "short allocation descriptors!"); 887 iput(mdata->s_mirror_fe); 888 mdata->s_mirror_fe = NULL; 889 if (fe_error) 890 goto error_exit; 891 } 892 893 /* 894 * bitmap file entry 895 * Note: 896 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) 897 */ 898 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { 899 addr.logicalBlockNum = mdata->s_bitmap_file_loc; 900 addr.partitionReferenceNum = map->s_partition_num; 901 902 udf_debug("Bitmap file location: block = %d part = %d\n", 903 addr.logicalBlockNum, addr.partitionReferenceNum); 904 905 mdata->s_bitmap_fe = udf_iget(sb, &addr); 906 907 if (mdata->s_bitmap_fe == NULL) { 908 if (sb->s_flags & MS_RDONLY) 909 udf_warning(sb, __func__, "bitmap inode efe " 910 "not found but it's ok since the disc" 911 " is mounted read-only"); 912 else { 913 udf_error(sb, __func__, "bitmap inode efe not " 914 "found and attempted read-write mount"); 915 goto error_exit; 916 } 917 } 918 } 919 920 udf_debug("udf_load_metadata_files Ok\n"); 921 922 return 0; 923 924 error_exit: 925 return 1; 926 } 927 928 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, 929 struct kernel_lb_addr *root) 930 { 931 struct fileSetDesc *fset; 932 933 fset = (struct fileSetDesc *)bh->b_data; 934 935 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); 936 937 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); 938 939 udf_debug("Rootdir at block=%d, partition=%d\n", 940 root->logicalBlockNum, root->partitionReferenceNum); 941 } 942 943 int udf_compute_nr_groups(struct super_block *sb, u32 partition) 944 { 945 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; 946 return DIV_ROUND_UP(map->s_partition_len + 947 (sizeof(struct spaceBitmapDesc) << 3), 948 sb->s_blocksize * 8); 949 } 950 951 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) 952 { 953 struct udf_bitmap *bitmap; 954 int nr_groups; 955 int size; 956 957 nr_groups = udf_compute_nr_groups(sb, index); 958 size = sizeof(struct udf_bitmap) + 959 (sizeof(struct buffer_head *) * nr_groups); 960 961 if (size <= PAGE_SIZE) 962 bitmap = kmalloc(size, GFP_KERNEL); 963 else 964 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */ 965 966 if (bitmap == NULL) { 967 udf_error(sb, __func__, 968 "Unable to allocate space for bitmap " 969 "and %d buffer_head pointers", nr_groups); 970 return NULL; 971 } 972 973 memset(bitmap, 0x00, size); 974 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); 975 bitmap->s_nr_groups = nr_groups; 976 return bitmap; 977 } 978 979 static int udf_fill_partdesc_info(struct super_block *sb, 980 struct partitionDesc *p, int p_index) 981 { 982 struct udf_part_map *map; 983 struct udf_sb_info *sbi = UDF_SB(sb); 984 struct partitionHeaderDesc *phd; 985 986 map = &sbi->s_partmaps[p_index]; 987 988 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ 989 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); 990 991 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) 992 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; 993 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) 994 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; 995 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) 996 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; 997 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) 998 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; 999 1000 udf_debug("Partition (%d type %x) starts at physical %d, " 1001 "block length %d\n", p_index, 1002 map->s_partition_type, map->s_partition_root, 1003 map->s_partition_len); 1004 1005 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && 1006 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) 1007 return 0; 1008 1009 phd = (struct partitionHeaderDesc *)p->partitionContentsUse; 1010 if (phd->unallocSpaceTable.extLength) { 1011 struct kernel_lb_addr loc = { 1012 .logicalBlockNum = le32_to_cpu( 1013 phd->unallocSpaceTable.extPosition), 1014 .partitionReferenceNum = p_index, 1015 }; 1016 1017 map->s_uspace.s_table = udf_iget(sb, &loc); 1018 if (!map->s_uspace.s_table) { 1019 udf_debug("cannot load unallocSpaceTable (part %d)\n", 1020 p_index); 1021 return 1; 1022 } 1023 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; 1024 udf_debug("unallocSpaceTable (part %d) @ %ld\n", 1025 p_index, map->s_uspace.s_table->i_ino); 1026 } 1027 1028 if (phd->unallocSpaceBitmap.extLength) { 1029 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); 1030 if (!bitmap) 1031 return 1; 1032 map->s_uspace.s_bitmap = bitmap; 1033 bitmap->s_extLength = le32_to_cpu( 1034 phd->unallocSpaceBitmap.extLength); 1035 bitmap->s_extPosition = le32_to_cpu( 1036 phd->unallocSpaceBitmap.extPosition); 1037 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; 1038 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index, 1039 bitmap->s_extPosition); 1040 } 1041 1042 if (phd->partitionIntegrityTable.extLength) 1043 udf_debug("partitionIntegrityTable (part %d)\n", p_index); 1044 1045 if (phd->freedSpaceTable.extLength) { 1046 struct kernel_lb_addr loc = { 1047 .logicalBlockNum = le32_to_cpu( 1048 phd->freedSpaceTable.extPosition), 1049 .partitionReferenceNum = p_index, 1050 }; 1051 1052 map->s_fspace.s_table = udf_iget(sb, &loc); 1053 if (!map->s_fspace.s_table) { 1054 udf_debug("cannot load freedSpaceTable (part %d)\n", 1055 p_index); 1056 return 1; 1057 } 1058 1059 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; 1060 udf_debug("freedSpaceTable (part %d) @ %ld\n", 1061 p_index, map->s_fspace.s_table->i_ino); 1062 } 1063 1064 if (phd->freedSpaceBitmap.extLength) { 1065 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); 1066 if (!bitmap) 1067 return 1; 1068 map->s_fspace.s_bitmap = bitmap; 1069 bitmap->s_extLength = le32_to_cpu( 1070 phd->freedSpaceBitmap.extLength); 1071 bitmap->s_extPosition = le32_to_cpu( 1072 phd->freedSpaceBitmap.extPosition); 1073 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; 1074 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index, 1075 bitmap->s_extPosition); 1076 } 1077 return 0; 1078 } 1079 1080 static void udf_find_vat_block(struct super_block *sb, int p_index, 1081 int type1_index, sector_t start_block) 1082 { 1083 struct udf_sb_info *sbi = UDF_SB(sb); 1084 struct udf_part_map *map = &sbi->s_partmaps[p_index]; 1085 sector_t vat_block; 1086 struct kernel_lb_addr ino; 1087 1088 /* 1089 * VAT file entry is in the last recorded block. Some broken disks have 1090 * it a few blocks before so try a bit harder... 1091 */ 1092 ino.partitionReferenceNum = type1_index; 1093 for (vat_block = start_block; 1094 vat_block >= map->s_partition_root && 1095 vat_block >= start_block - 3 && 1096 !sbi->s_vat_inode; vat_block--) { 1097 ino.logicalBlockNum = vat_block - map->s_partition_root; 1098 sbi->s_vat_inode = udf_iget(sb, &ino); 1099 } 1100 } 1101 1102 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) 1103 { 1104 struct udf_sb_info *sbi = UDF_SB(sb); 1105 struct udf_part_map *map = &sbi->s_partmaps[p_index]; 1106 struct buffer_head *bh = NULL; 1107 struct udf_inode_info *vati; 1108 uint32_t pos; 1109 struct virtualAllocationTable20 *vat20; 1110 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 1111 1112 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); 1113 if (!sbi->s_vat_inode && 1114 sbi->s_last_block != blocks - 1) { 1115 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the" 1116 " last recorded block (%lu), retrying with the last " 1117 "block of the device (%lu).\n", 1118 (unsigned long)sbi->s_last_block, 1119 (unsigned long)blocks - 1); 1120 udf_find_vat_block(sb, p_index, type1_index, blocks - 1); 1121 } 1122 if (!sbi->s_vat_inode) 1123 return 1; 1124 1125 if (map->s_partition_type == UDF_VIRTUAL_MAP15) { 1126 map->s_type_specific.s_virtual.s_start_offset = 0; 1127 map->s_type_specific.s_virtual.s_num_entries = 1128 (sbi->s_vat_inode->i_size - 36) >> 2; 1129 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { 1130 vati = UDF_I(sbi->s_vat_inode); 1131 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 1132 pos = udf_block_map(sbi->s_vat_inode, 0); 1133 bh = sb_bread(sb, pos); 1134 if (!bh) 1135 return 1; 1136 vat20 = (struct virtualAllocationTable20 *)bh->b_data; 1137 } else { 1138 vat20 = (struct virtualAllocationTable20 *) 1139 vati->i_ext.i_data; 1140 } 1141 1142 map->s_type_specific.s_virtual.s_start_offset = 1143 le16_to_cpu(vat20->lengthHeader); 1144 map->s_type_specific.s_virtual.s_num_entries = 1145 (sbi->s_vat_inode->i_size - 1146 map->s_type_specific.s_virtual. 1147 s_start_offset) >> 2; 1148 brelse(bh); 1149 } 1150 return 0; 1151 } 1152 1153 static int udf_load_partdesc(struct super_block *sb, sector_t block) 1154 { 1155 struct buffer_head *bh; 1156 struct partitionDesc *p; 1157 struct udf_part_map *map; 1158 struct udf_sb_info *sbi = UDF_SB(sb); 1159 int i, type1_idx; 1160 uint16_t partitionNumber; 1161 uint16_t ident; 1162 int ret = 0; 1163 1164 bh = udf_read_tagged(sb, block, block, &ident); 1165 if (!bh) 1166 return 1; 1167 if (ident != TAG_IDENT_PD) 1168 goto out_bh; 1169 1170 p = (struct partitionDesc *)bh->b_data; 1171 partitionNumber = le16_to_cpu(p->partitionNumber); 1172 1173 /* First scan for TYPE1, SPARABLE and METADATA partitions */ 1174 for (i = 0; i < sbi->s_partitions; i++) { 1175 map = &sbi->s_partmaps[i]; 1176 udf_debug("Searching map: (%d == %d)\n", 1177 map->s_partition_num, partitionNumber); 1178 if (map->s_partition_num == partitionNumber && 1179 (map->s_partition_type == UDF_TYPE1_MAP15 || 1180 map->s_partition_type == UDF_SPARABLE_MAP15)) 1181 break; 1182 } 1183 1184 if (i >= sbi->s_partitions) { 1185 udf_debug("Partition (%d) not found in partition map\n", 1186 partitionNumber); 1187 goto out_bh; 1188 } 1189 1190 ret = udf_fill_partdesc_info(sb, p, i); 1191 1192 /* 1193 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and 1194 * PHYSICAL partitions are already set up 1195 */ 1196 type1_idx = i; 1197 for (i = 0; i < sbi->s_partitions; i++) { 1198 map = &sbi->s_partmaps[i]; 1199 1200 if (map->s_partition_num == partitionNumber && 1201 (map->s_partition_type == UDF_VIRTUAL_MAP15 || 1202 map->s_partition_type == UDF_VIRTUAL_MAP20 || 1203 map->s_partition_type == UDF_METADATA_MAP25)) 1204 break; 1205 } 1206 1207 if (i >= sbi->s_partitions) 1208 goto out_bh; 1209 1210 ret = udf_fill_partdesc_info(sb, p, i); 1211 if (ret) 1212 goto out_bh; 1213 1214 if (map->s_partition_type == UDF_METADATA_MAP25) { 1215 ret = udf_load_metadata_files(sb, i); 1216 if (ret) { 1217 printk(KERN_ERR "UDF-fs: error loading MetaData " 1218 "partition map %d\n", i); 1219 goto out_bh; 1220 } 1221 } else { 1222 ret = udf_load_vat(sb, i, type1_idx); 1223 if (ret) 1224 goto out_bh; 1225 /* 1226 * Mark filesystem read-only if we have a partition with 1227 * virtual map since we don't handle writing to it (we 1228 * overwrite blocks instead of relocating them). 1229 */ 1230 sb->s_flags |= MS_RDONLY; 1231 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only " 1232 "because writing to pseudooverwrite partition is " 1233 "not implemented.\n"); 1234 } 1235 out_bh: 1236 /* In case loading failed, we handle cleanup in udf_fill_super */ 1237 brelse(bh); 1238 return ret; 1239 } 1240 1241 static int udf_load_logicalvol(struct super_block *sb, sector_t block, 1242 struct kernel_lb_addr *fileset) 1243 { 1244 struct logicalVolDesc *lvd; 1245 int i, j, offset; 1246 uint8_t type; 1247 struct udf_sb_info *sbi = UDF_SB(sb); 1248 struct genericPartitionMap *gpm; 1249 uint16_t ident; 1250 struct buffer_head *bh; 1251 int ret = 0; 1252 1253 bh = udf_read_tagged(sb, block, block, &ident); 1254 if (!bh) 1255 return 1; 1256 BUG_ON(ident != TAG_IDENT_LVD); 1257 lvd = (struct logicalVolDesc *)bh->b_data; 1258 1259 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); 1260 if (i != 0) { 1261 ret = i; 1262 goto out_bh; 1263 } 1264 1265 for (i = 0, offset = 0; 1266 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); 1267 i++, offset += gpm->partitionMapLength) { 1268 struct udf_part_map *map = &sbi->s_partmaps[i]; 1269 gpm = (struct genericPartitionMap *) 1270 &(lvd->partitionMaps[offset]); 1271 type = gpm->partitionMapType; 1272 if (type == 1) { 1273 struct genericPartitionMap1 *gpm1 = 1274 (struct genericPartitionMap1 *)gpm; 1275 map->s_partition_type = UDF_TYPE1_MAP15; 1276 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); 1277 map->s_partition_num = le16_to_cpu(gpm1->partitionNum); 1278 map->s_partition_func = NULL; 1279 } else if (type == 2) { 1280 struct udfPartitionMap2 *upm2 = 1281 (struct udfPartitionMap2 *)gpm; 1282 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, 1283 strlen(UDF_ID_VIRTUAL))) { 1284 u16 suf = 1285 le16_to_cpu(((__le16 *)upm2->partIdent. 1286 identSuffix)[0]); 1287 if (suf < 0x0200) { 1288 map->s_partition_type = 1289 UDF_VIRTUAL_MAP15; 1290 map->s_partition_func = 1291 udf_get_pblock_virt15; 1292 } else { 1293 map->s_partition_type = 1294 UDF_VIRTUAL_MAP20; 1295 map->s_partition_func = 1296 udf_get_pblock_virt20; 1297 } 1298 } else if (!strncmp(upm2->partIdent.ident, 1299 UDF_ID_SPARABLE, 1300 strlen(UDF_ID_SPARABLE))) { 1301 uint32_t loc; 1302 struct sparingTable *st; 1303 struct sparablePartitionMap *spm = 1304 (struct sparablePartitionMap *)gpm; 1305 1306 map->s_partition_type = UDF_SPARABLE_MAP15; 1307 map->s_type_specific.s_sparing.s_packet_len = 1308 le16_to_cpu(spm->packetLength); 1309 for (j = 0; j < spm->numSparingTables; j++) { 1310 struct buffer_head *bh2; 1311 1312 loc = le32_to_cpu( 1313 spm->locSparingTable[j]); 1314 bh2 = udf_read_tagged(sb, loc, loc, 1315 &ident); 1316 map->s_type_specific.s_sparing. 1317 s_spar_map[j] = bh2; 1318 1319 if (bh2 == NULL) 1320 continue; 1321 1322 st = (struct sparingTable *)bh2->b_data; 1323 if (ident != 0 || strncmp( 1324 st->sparingIdent.ident, 1325 UDF_ID_SPARING, 1326 strlen(UDF_ID_SPARING))) { 1327 brelse(bh2); 1328 map->s_type_specific.s_sparing. 1329 s_spar_map[j] = NULL; 1330 } 1331 } 1332 map->s_partition_func = udf_get_pblock_spar15; 1333 } else if (!strncmp(upm2->partIdent.ident, 1334 UDF_ID_METADATA, 1335 strlen(UDF_ID_METADATA))) { 1336 struct udf_meta_data *mdata = 1337 &map->s_type_specific.s_metadata; 1338 struct metadataPartitionMap *mdm = 1339 (struct metadataPartitionMap *) 1340 &(lvd->partitionMaps[offset]); 1341 udf_debug("Parsing Logical vol part %d " 1342 "type %d id=%s\n", i, type, 1343 UDF_ID_METADATA); 1344 1345 map->s_partition_type = UDF_METADATA_MAP25; 1346 map->s_partition_func = udf_get_pblock_meta25; 1347 1348 mdata->s_meta_file_loc = 1349 le32_to_cpu(mdm->metadataFileLoc); 1350 mdata->s_mirror_file_loc = 1351 le32_to_cpu(mdm->metadataMirrorFileLoc); 1352 mdata->s_bitmap_file_loc = 1353 le32_to_cpu(mdm->metadataBitmapFileLoc); 1354 mdata->s_alloc_unit_size = 1355 le32_to_cpu(mdm->allocUnitSize); 1356 mdata->s_align_unit_size = 1357 le16_to_cpu(mdm->alignUnitSize); 1358 mdata->s_dup_md_flag = 1359 mdm->flags & 0x01; 1360 1361 udf_debug("Metadata Ident suffix=0x%x\n", 1362 (le16_to_cpu( 1363 ((__le16 *) 1364 mdm->partIdent.identSuffix)[0]))); 1365 udf_debug("Metadata part num=%d\n", 1366 le16_to_cpu(mdm->partitionNum)); 1367 udf_debug("Metadata part alloc unit size=%d\n", 1368 le32_to_cpu(mdm->allocUnitSize)); 1369 udf_debug("Metadata file loc=%d\n", 1370 le32_to_cpu(mdm->metadataFileLoc)); 1371 udf_debug("Mirror file loc=%d\n", 1372 le32_to_cpu(mdm->metadataMirrorFileLoc)); 1373 udf_debug("Bitmap file loc=%d\n", 1374 le32_to_cpu(mdm->metadataBitmapFileLoc)); 1375 udf_debug("Duplicate Flag: %d %d\n", 1376 mdata->s_dup_md_flag, mdm->flags); 1377 } else { 1378 udf_debug("Unknown ident: %s\n", 1379 upm2->partIdent.ident); 1380 continue; 1381 } 1382 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); 1383 map->s_partition_num = le16_to_cpu(upm2->partitionNum); 1384 } 1385 udf_debug("Partition (%d:%d) type %d on volume %d\n", 1386 i, map->s_partition_num, type, 1387 map->s_volumeseqnum); 1388 } 1389 1390 if (fileset) { 1391 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); 1392 1393 *fileset = lelb_to_cpu(la->extLocation); 1394 udf_debug("FileSet found in LogicalVolDesc at block=%d, " 1395 "partition=%d\n", fileset->logicalBlockNum, 1396 fileset->partitionReferenceNum); 1397 } 1398 if (lvd->integritySeqExt.extLength) 1399 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); 1400 1401 out_bh: 1402 brelse(bh); 1403 return ret; 1404 } 1405 1406 /* 1407 * udf_load_logicalvolint 1408 * 1409 */ 1410 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) 1411 { 1412 struct buffer_head *bh = NULL; 1413 uint16_t ident; 1414 struct udf_sb_info *sbi = UDF_SB(sb); 1415 struct logicalVolIntegrityDesc *lvid; 1416 1417 while (loc.extLength > 0 && 1418 (bh = udf_read_tagged(sb, loc.extLocation, 1419 loc.extLocation, &ident)) && 1420 ident == TAG_IDENT_LVID) { 1421 sbi->s_lvid_bh = bh; 1422 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1423 1424 if (lvid->nextIntegrityExt.extLength) 1425 udf_load_logicalvolint(sb, 1426 leea_to_cpu(lvid->nextIntegrityExt)); 1427 1428 if (sbi->s_lvid_bh != bh) 1429 brelse(bh); 1430 loc.extLength -= sb->s_blocksize; 1431 loc.extLocation++; 1432 } 1433 if (sbi->s_lvid_bh != bh) 1434 brelse(bh); 1435 } 1436 1437 /* 1438 * udf_process_sequence 1439 * 1440 * PURPOSE 1441 * Process a main/reserve volume descriptor sequence. 1442 * 1443 * PRE-CONDITIONS 1444 * sb Pointer to _locked_ superblock. 1445 * block First block of first extent of the sequence. 1446 * lastblock Lastblock of first extent of the sequence. 1447 * 1448 * HISTORY 1449 * July 1, 1997 - Andrew E. Mileski 1450 * Written, tested, and released. 1451 */ 1452 static noinline int udf_process_sequence(struct super_block *sb, long block, 1453 long lastblock, struct kernel_lb_addr *fileset) 1454 { 1455 struct buffer_head *bh = NULL; 1456 struct udf_vds_record vds[VDS_POS_LENGTH]; 1457 struct udf_vds_record *curr; 1458 struct generic_desc *gd; 1459 struct volDescPtr *vdp; 1460 int done = 0; 1461 uint32_t vdsn; 1462 uint16_t ident; 1463 long next_s = 0, next_e = 0; 1464 1465 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); 1466 1467 /* 1468 * Read the main descriptor sequence and find which descriptors 1469 * are in it. 1470 */ 1471 for (; (!done && block <= lastblock); block++) { 1472 1473 bh = udf_read_tagged(sb, block, block, &ident); 1474 if (!bh) { 1475 printk(KERN_ERR "udf: Block %Lu of volume descriptor " 1476 "sequence is corrupted or we could not read " 1477 "it.\n", (unsigned long long)block); 1478 return 1; 1479 } 1480 1481 /* Process each descriptor (ISO 13346 3/8.3-8.4) */ 1482 gd = (struct generic_desc *)bh->b_data; 1483 vdsn = le32_to_cpu(gd->volDescSeqNum); 1484 switch (ident) { 1485 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ 1486 curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; 1487 if (vdsn >= curr->volDescSeqNum) { 1488 curr->volDescSeqNum = vdsn; 1489 curr->block = block; 1490 } 1491 break; 1492 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ 1493 curr = &vds[VDS_POS_VOL_DESC_PTR]; 1494 if (vdsn >= curr->volDescSeqNum) { 1495 curr->volDescSeqNum = vdsn; 1496 curr->block = block; 1497 1498 vdp = (struct volDescPtr *)bh->b_data; 1499 next_s = le32_to_cpu( 1500 vdp->nextVolDescSeqExt.extLocation); 1501 next_e = le32_to_cpu( 1502 vdp->nextVolDescSeqExt.extLength); 1503 next_e = next_e >> sb->s_blocksize_bits; 1504 next_e += next_s; 1505 } 1506 break; 1507 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ 1508 curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; 1509 if (vdsn >= curr->volDescSeqNum) { 1510 curr->volDescSeqNum = vdsn; 1511 curr->block = block; 1512 } 1513 break; 1514 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ 1515 curr = &vds[VDS_POS_PARTITION_DESC]; 1516 if (!curr->block) 1517 curr->block = block; 1518 break; 1519 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ 1520 curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; 1521 if (vdsn >= curr->volDescSeqNum) { 1522 curr->volDescSeqNum = vdsn; 1523 curr->block = block; 1524 } 1525 break; 1526 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ 1527 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; 1528 if (vdsn >= curr->volDescSeqNum) { 1529 curr->volDescSeqNum = vdsn; 1530 curr->block = block; 1531 } 1532 break; 1533 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ 1534 vds[VDS_POS_TERMINATING_DESC].block = block; 1535 if (next_e) { 1536 block = next_s; 1537 lastblock = next_e; 1538 next_s = next_e = 0; 1539 } else 1540 done = 1; 1541 break; 1542 } 1543 brelse(bh); 1544 } 1545 /* 1546 * Now read interesting descriptors again and process them 1547 * in a suitable order 1548 */ 1549 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { 1550 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n"); 1551 return 1; 1552 } 1553 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) 1554 return 1; 1555 1556 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, 1557 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) 1558 return 1; 1559 1560 if (vds[VDS_POS_PARTITION_DESC].block) { 1561 /* 1562 * We rescan the whole descriptor sequence to find 1563 * partition descriptor blocks and process them. 1564 */ 1565 for (block = vds[VDS_POS_PARTITION_DESC].block; 1566 block < vds[VDS_POS_TERMINATING_DESC].block; 1567 block++) 1568 if (udf_load_partdesc(sb, block)) 1569 return 1; 1570 } 1571 1572 return 0; 1573 } 1574 1575 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, 1576 struct kernel_lb_addr *fileset) 1577 { 1578 struct anchorVolDescPtr *anchor; 1579 long main_s, main_e, reserve_s, reserve_e; 1580 1581 anchor = (struct anchorVolDescPtr *)bh->b_data; 1582 1583 /* Locate the main sequence */ 1584 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); 1585 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); 1586 main_e = main_e >> sb->s_blocksize_bits; 1587 main_e += main_s; 1588 1589 /* Locate the reserve sequence */ 1590 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); 1591 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); 1592 reserve_e = reserve_e >> sb->s_blocksize_bits; 1593 reserve_e += reserve_s; 1594 1595 /* Process the main & reserve sequences */ 1596 /* responsible for finding the PartitionDesc(s) */ 1597 if (!udf_process_sequence(sb, main_s, main_e, fileset)) 1598 return 1; 1599 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset); 1600 } 1601 1602 /* 1603 * Check whether there is an anchor block in the given block and 1604 * load Volume Descriptor Sequence if so. 1605 */ 1606 static int udf_check_anchor_block(struct super_block *sb, sector_t block, 1607 struct kernel_lb_addr *fileset) 1608 { 1609 struct buffer_head *bh; 1610 uint16_t ident; 1611 int ret; 1612 1613 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && 1614 udf_fixed_to_variable(block) >= 1615 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) 1616 return 0; 1617 1618 bh = udf_read_tagged(sb, block, block, &ident); 1619 if (!bh) 1620 return 0; 1621 if (ident != TAG_IDENT_AVDP) { 1622 brelse(bh); 1623 return 0; 1624 } 1625 ret = udf_load_sequence(sb, bh, fileset); 1626 brelse(bh); 1627 return ret; 1628 } 1629 1630 /* Search for an anchor volume descriptor pointer */ 1631 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, 1632 struct kernel_lb_addr *fileset) 1633 { 1634 sector_t last[6]; 1635 int i; 1636 struct udf_sb_info *sbi = UDF_SB(sb); 1637 int last_count = 0; 1638 1639 /* First try user provided anchor */ 1640 if (sbi->s_anchor) { 1641 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) 1642 return lastblock; 1643 } 1644 /* 1645 * according to spec, anchor is in either: 1646 * block 256 1647 * lastblock-256 1648 * lastblock 1649 * however, if the disc isn't closed, it could be 512. 1650 */ 1651 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) 1652 return lastblock; 1653 /* 1654 * The trouble is which block is the last one. Drives often misreport 1655 * this so we try various possibilities. 1656 */ 1657 last[last_count++] = lastblock; 1658 if (lastblock >= 1) 1659 last[last_count++] = lastblock - 1; 1660 last[last_count++] = lastblock + 1; 1661 if (lastblock >= 2) 1662 last[last_count++] = lastblock - 2; 1663 if (lastblock >= 150) 1664 last[last_count++] = lastblock - 150; 1665 if (lastblock >= 152) 1666 last[last_count++] = lastblock - 152; 1667 1668 for (i = 0; i < last_count; i++) { 1669 if (last[i] >= sb->s_bdev->bd_inode->i_size >> 1670 sb->s_blocksize_bits) 1671 continue; 1672 if (udf_check_anchor_block(sb, last[i], fileset)) 1673 return last[i]; 1674 if (last[i] < 256) 1675 continue; 1676 if (udf_check_anchor_block(sb, last[i] - 256, fileset)) 1677 return last[i]; 1678 } 1679 1680 /* Finally try block 512 in case media is open */ 1681 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) 1682 return last[0]; 1683 return 0; 1684 } 1685 1686 /* 1687 * Find an anchor volume descriptor and load Volume Descriptor Sequence from 1688 * area specified by it. The function expects sbi->s_lastblock to be the last 1689 * block on the media. 1690 * 1691 * Return 1 if ok, 0 if not found. 1692 * 1693 */ 1694 static int udf_find_anchor(struct super_block *sb, 1695 struct kernel_lb_addr *fileset) 1696 { 1697 sector_t lastblock; 1698 struct udf_sb_info *sbi = UDF_SB(sb); 1699 1700 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); 1701 if (lastblock) 1702 goto out; 1703 1704 /* No anchor found? Try VARCONV conversion of block numbers */ 1705 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); 1706 /* Firstly, we try to not convert number of the last block */ 1707 lastblock = udf_scan_anchors(sb, 1708 udf_variable_to_fixed(sbi->s_last_block), 1709 fileset); 1710 if (lastblock) 1711 goto out; 1712 1713 /* Secondly, we try with converted number of the last block */ 1714 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); 1715 if (!lastblock) { 1716 /* VARCONV didn't help. Clear it. */ 1717 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); 1718 return 0; 1719 } 1720 out: 1721 sbi->s_last_block = lastblock; 1722 return 1; 1723 } 1724 1725 /* 1726 * Check Volume Structure Descriptor, find Anchor block and load Volume 1727 * Descriptor Sequence 1728 */ 1729 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, 1730 int silent, struct kernel_lb_addr *fileset) 1731 { 1732 struct udf_sb_info *sbi = UDF_SB(sb); 1733 loff_t nsr_off; 1734 1735 if (!sb_set_blocksize(sb, uopt->blocksize)) { 1736 if (!silent) 1737 printk(KERN_WARNING "UDF-fs: Bad block size\n"); 1738 return 0; 1739 } 1740 sbi->s_last_block = uopt->lastblock; 1741 if (!uopt->novrs) { 1742 /* Check that it is NSR02 compliant */ 1743 nsr_off = udf_check_vsd(sb); 1744 if (!nsr_off) { 1745 if (!silent) 1746 printk(KERN_WARNING "UDF-fs: No VRS found\n"); 1747 return 0; 1748 } 1749 if (nsr_off == -1) 1750 udf_debug("Failed to read byte 32768. Assuming open " 1751 "disc. Skipping validity check\n"); 1752 if (!sbi->s_last_block) 1753 sbi->s_last_block = udf_get_last_block(sb); 1754 } else { 1755 udf_debug("Validity check skipped because of novrs option\n"); 1756 } 1757 1758 /* Look for anchor block and load Volume Descriptor Sequence */ 1759 sbi->s_anchor = uopt->anchor; 1760 if (!udf_find_anchor(sb, fileset)) { 1761 if (!silent) 1762 printk(KERN_WARNING "UDF-fs: No anchor found\n"); 1763 return 0; 1764 } 1765 return 1; 1766 } 1767 1768 static void udf_open_lvid(struct super_block *sb) 1769 { 1770 struct udf_sb_info *sbi = UDF_SB(sb); 1771 struct buffer_head *bh = sbi->s_lvid_bh; 1772 struct logicalVolIntegrityDesc *lvid; 1773 struct logicalVolIntegrityDescImpUse *lvidiu; 1774 1775 if (!bh) 1776 return; 1777 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1778 lvidiu = udf_sb_lvidiu(sbi); 1779 1780 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1781 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1782 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, 1783 CURRENT_TIME); 1784 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); 1785 1786 lvid->descTag.descCRC = cpu_to_le16( 1787 crc_itu_t(0, (char *)lvid + sizeof(struct tag), 1788 le16_to_cpu(lvid->descTag.descCRCLength))); 1789 1790 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); 1791 mark_buffer_dirty(bh); 1792 sbi->s_lvid_dirty = 0; 1793 } 1794 1795 static void udf_close_lvid(struct super_block *sb) 1796 { 1797 struct udf_sb_info *sbi = UDF_SB(sb); 1798 struct buffer_head *bh = sbi->s_lvid_bh; 1799 struct logicalVolIntegrityDesc *lvid; 1800 struct logicalVolIntegrityDescImpUse *lvidiu; 1801 1802 if (!bh) 1803 return; 1804 1805 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1806 lvidiu = udf_sb_lvidiu(sbi); 1807 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1808 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1809 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); 1810 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) 1811 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); 1812 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) 1813 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); 1814 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) 1815 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); 1816 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); 1817 1818 lvid->descTag.descCRC = cpu_to_le16( 1819 crc_itu_t(0, (char *)lvid + sizeof(struct tag), 1820 le16_to_cpu(lvid->descTag.descCRCLength))); 1821 1822 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); 1823 mark_buffer_dirty(bh); 1824 sbi->s_lvid_dirty = 0; 1825 } 1826 1827 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) 1828 { 1829 int i; 1830 int nr_groups = bitmap->s_nr_groups; 1831 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * 1832 nr_groups); 1833 1834 for (i = 0; i < nr_groups; i++) 1835 if (bitmap->s_block_bitmap[i]) 1836 brelse(bitmap->s_block_bitmap[i]); 1837 1838 if (size <= PAGE_SIZE) 1839 kfree(bitmap); 1840 else 1841 vfree(bitmap); 1842 } 1843 1844 static void udf_free_partition(struct udf_part_map *map) 1845 { 1846 int i; 1847 struct udf_meta_data *mdata; 1848 1849 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) 1850 iput(map->s_uspace.s_table); 1851 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) 1852 iput(map->s_fspace.s_table); 1853 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) 1854 udf_sb_free_bitmap(map->s_uspace.s_bitmap); 1855 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) 1856 udf_sb_free_bitmap(map->s_fspace.s_bitmap); 1857 if (map->s_partition_type == UDF_SPARABLE_MAP15) 1858 for (i = 0; i < 4; i++) 1859 brelse(map->s_type_specific.s_sparing.s_spar_map[i]); 1860 else if (map->s_partition_type == UDF_METADATA_MAP25) { 1861 mdata = &map->s_type_specific.s_metadata; 1862 iput(mdata->s_metadata_fe); 1863 mdata->s_metadata_fe = NULL; 1864 1865 iput(mdata->s_mirror_fe); 1866 mdata->s_mirror_fe = NULL; 1867 1868 iput(mdata->s_bitmap_fe); 1869 mdata->s_bitmap_fe = NULL; 1870 } 1871 } 1872 1873 static int udf_fill_super(struct super_block *sb, void *options, int silent) 1874 { 1875 int i; 1876 int ret; 1877 struct inode *inode = NULL; 1878 struct udf_options uopt; 1879 struct kernel_lb_addr rootdir, fileset; 1880 struct udf_sb_info *sbi; 1881 1882 lock_kernel(); 1883 1884 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); 1885 uopt.uid = -1; 1886 uopt.gid = -1; 1887 uopt.umask = 0; 1888 uopt.fmode = UDF_INVALID_MODE; 1889 uopt.dmode = UDF_INVALID_MODE; 1890 1891 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); 1892 if (!sbi) { 1893 unlock_kernel(); 1894 return -ENOMEM; 1895 } 1896 1897 sb->s_fs_info = sbi; 1898 1899 mutex_init(&sbi->s_alloc_mutex); 1900 1901 if (!udf_parse_options((char *)options, &uopt, false)) 1902 goto error_out; 1903 1904 if (uopt.flags & (1 << UDF_FLAG_UTF8) && 1905 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { 1906 udf_error(sb, "udf_read_super", 1907 "utf8 cannot be combined with iocharset\n"); 1908 goto error_out; 1909 } 1910 #ifdef CONFIG_UDF_NLS 1911 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { 1912 uopt.nls_map = load_nls_default(); 1913 if (!uopt.nls_map) 1914 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); 1915 else 1916 udf_debug("Using default NLS map\n"); 1917 } 1918 #endif 1919 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) 1920 uopt.flags |= (1 << UDF_FLAG_UTF8); 1921 1922 fileset.logicalBlockNum = 0xFFFFFFFF; 1923 fileset.partitionReferenceNum = 0xFFFF; 1924 1925 sbi->s_flags = uopt.flags; 1926 sbi->s_uid = uopt.uid; 1927 sbi->s_gid = uopt.gid; 1928 sbi->s_umask = uopt.umask; 1929 sbi->s_fmode = uopt.fmode; 1930 sbi->s_dmode = uopt.dmode; 1931 sbi->s_nls_map = uopt.nls_map; 1932 1933 if (uopt.session == 0xFFFFFFFF) 1934 sbi->s_session = udf_get_last_session(sb); 1935 else 1936 sbi->s_session = uopt.session; 1937 1938 udf_debug("Multi-session=%d\n", sbi->s_session); 1939 1940 /* Fill in the rest of the superblock */ 1941 sb->s_op = &udf_sb_ops; 1942 sb->s_export_op = &udf_export_ops; 1943 1944 sb->s_dirt = 0; 1945 sb->s_magic = UDF_SUPER_MAGIC; 1946 sb->s_time_gran = 1000; 1947 1948 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { 1949 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1950 } else { 1951 uopt.blocksize = bdev_logical_block_size(sb->s_bdev); 1952 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1953 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { 1954 if (!silent) 1955 printk(KERN_NOTICE 1956 "UDF-fs: Rescanning with blocksize " 1957 "%d\n", UDF_DEFAULT_BLOCKSIZE); 1958 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; 1959 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1960 } 1961 } 1962 if (!ret) { 1963 printk(KERN_WARNING "UDF-fs: No partition found (1)\n"); 1964 goto error_out; 1965 } 1966 1967 udf_debug("Lastblock=%d\n", sbi->s_last_block); 1968 1969 if (sbi->s_lvid_bh) { 1970 struct logicalVolIntegrityDescImpUse *lvidiu = 1971 udf_sb_lvidiu(sbi); 1972 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); 1973 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); 1974 /* uint16_t maxUDFWriteRev = 1975 le16_to_cpu(lvidiu->maxUDFWriteRev); */ 1976 1977 if (minUDFReadRev > UDF_MAX_READ_VERSION) { 1978 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x " 1979 "(max is %x)\n", 1980 le16_to_cpu(lvidiu->minUDFReadRev), 1981 UDF_MAX_READ_VERSION); 1982 goto error_out; 1983 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) 1984 sb->s_flags |= MS_RDONLY; 1985 1986 sbi->s_udfrev = minUDFWriteRev; 1987 1988 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) 1989 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); 1990 if (minUDFReadRev >= UDF_VERS_USE_STREAMS) 1991 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); 1992 } 1993 1994 if (!sbi->s_partitions) { 1995 printk(KERN_WARNING "UDF-fs: No partition found (2)\n"); 1996 goto error_out; 1997 } 1998 1999 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & 2000 UDF_PART_FLAG_READ_ONLY) { 2001 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; " 2002 "forcing readonly mount\n"); 2003 sb->s_flags |= MS_RDONLY; 2004 } 2005 2006 if (udf_find_fileset(sb, &fileset, &rootdir)) { 2007 printk(KERN_WARNING "UDF-fs: No fileset found\n"); 2008 goto error_out; 2009 } 2010 2011 if (!silent) { 2012 struct timestamp ts; 2013 udf_time_to_disk_stamp(&ts, sbi->s_record_time); 2014 udf_info("UDF: Mounting volume '%s', " 2015 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n", 2016 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day, 2017 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); 2018 } 2019 if (!(sb->s_flags & MS_RDONLY)) 2020 udf_open_lvid(sb); 2021 2022 /* Assign the root inode */ 2023 /* assign inodes by physical block number */ 2024 /* perhaps it's not extensible enough, but for now ... */ 2025 inode = udf_iget(sb, &rootdir); 2026 if (!inode) { 2027 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, " 2028 "partition=%d\n", 2029 rootdir.logicalBlockNum, rootdir.partitionReferenceNum); 2030 goto error_out; 2031 } 2032 2033 /* Allocate a dentry for the root inode */ 2034 sb->s_root = d_alloc_root(inode); 2035 if (!sb->s_root) { 2036 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n"); 2037 iput(inode); 2038 goto error_out; 2039 } 2040 sb->s_maxbytes = MAX_LFS_FILESIZE; 2041 unlock_kernel(); 2042 return 0; 2043 2044 error_out: 2045 if (sbi->s_vat_inode) 2046 iput(sbi->s_vat_inode); 2047 if (sbi->s_partitions) 2048 for (i = 0; i < sbi->s_partitions; i++) 2049 udf_free_partition(&sbi->s_partmaps[i]); 2050 #ifdef CONFIG_UDF_NLS 2051 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 2052 unload_nls(sbi->s_nls_map); 2053 #endif 2054 if (!(sb->s_flags & MS_RDONLY)) 2055 udf_close_lvid(sb); 2056 brelse(sbi->s_lvid_bh); 2057 2058 kfree(sbi->s_partmaps); 2059 kfree(sbi); 2060 sb->s_fs_info = NULL; 2061 2062 unlock_kernel(); 2063 return -EINVAL; 2064 } 2065 2066 static void udf_error(struct super_block *sb, const char *function, 2067 const char *fmt, ...) 2068 { 2069 va_list args; 2070 2071 if (!(sb->s_flags & MS_RDONLY)) { 2072 /* mark sb error */ 2073 sb->s_dirt = 1; 2074 } 2075 va_start(args, fmt); 2076 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2077 va_end(args); 2078 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n", 2079 sb->s_id, function, error_buf); 2080 } 2081 2082 void udf_warning(struct super_block *sb, const char *function, 2083 const char *fmt, ...) 2084 { 2085 va_list args; 2086 2087 va_start(args, fmt); 2088 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2089 va_end(args); 2090 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", 2091 sb->s_id, function, error_buf); 2092 } 2093 2094 static void udf_put_super(struct super_block *sb) 2095 { 2096 int i; 2097 struct udf_sb_info *sbi; 2098 2099 sbi = UDF_SB(sb); 2100 2101 lock_kernel(); 2102 2103 if (sbi->s_vat_inode) 2104 iput(sbi->s_vat_inode); 2105 if (sbi->s_partitions) 2106 for (i = 0; i < sbi->s_partitions; i++) 2107 udf_free_partition(&sbi->s_partmaps[i]); 2108 #ifdef CONFIG_UDF_NLS 2109 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 2110 unload_nls(sbi->s_nls_map); 2111 #endif 2112 if (!(sb->s_flags & MS_RDONLY)) 2113 udf_close_lvid(sb); 2114 brelse(sbi->s_lvid_bh); 2115 kfree(sbi->s_partmaps); 2116 kfree(sb->s_fs_info); 2117 sb->s_fs_info = NULL; 2118 2119 unlock_kernel(); 2120 } 2121 2122 static int udf_sync_fs(struct super_block *sb, int wait) 2123 { 2124 struct udf_sb_info *sbi = UDF_SB(sb); 2125 2126 mutex_lock(&sbi->s_alloc_mutex); 2127 if (sbi->s_lvid_dirty) { 2128 /* 2129 * Blockdevice will be synced later so we don't have to submit 2130 * the buffer for IO 2131 */ 2132 mark_buffer_dirty(sbi->s_lvid_bh); 2133 sb->s_dirt = 0; 2134 sbi->s_lvid_dirty = 0; 2135 } 2136 mutex_unlock(&sbi->s_alloc_mutex); 2137 2138 return 0; 2139 } 2140 2141 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) 2142 { 2143 struct super_block *sb = dentry->d_sb; 2144 struct udf_sb_info *sbi = UDF_SB(sb); 2145 struct logicalVolIntegrityDescImpUse *lvidiu; 2146 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 2147 2148 if (sbi->s_lvid_bh != NULL) 2149 lvidiu = udf_sb_lvidiu(sbi); 2150 else 2151 lvidiu = NULL; 2152 2153 buf->f_type = UDF_SUPER_MAGIC; 2154 buf->f_bsize = sb->s_blocksize; 2155 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; 2156 buf->f_bfree = udf_count_free(sb); 2157 buf->f_bavail = buf->f_bfree; 2158 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + 2159 le32_to_cpu(lvidiu->numDirs)) : 0) 2160 + buf->f_bfree; 2161 buf->f_ffree = buf->f_bfree; 2162 buf->f_namelen = UDF_NAME_LEN - 2; 2163 buf->f_fsid.val[0] = (u32)id; 2164 buf->f_fsid.val[1] = (u32)(id >> 32); 2165 2166 return 0; 2167 } 2168 2169 static unsigned int udf_count_free_bitmap(struct super_block *sb, 2170 struct udf_bitmap *bitmap) 2171 { 2172 struct buffer_head *bh = NULL; 2173 unsigned int accum = 0; 2174 int index; 2175 int block = 0, newblock; 2176 struct kernel_lb_addr loc; 2177 uint32_t bytes; 2178 uint8_t *ptr; 2179 uint16_t ident; 2180 struct spaceBitmapDesc *bm; 2181 2182 lock_kernel(); 2183 2184 loc.logicalBlockNum = bitmap->s_extPosition; 2185 loc.partitionReferenceNum = UDF_SB(sb)->s_partition; 2186 bh = udf_read_ptagged(sb, &loc, 0, &ident); 2187 2188 if (!bh) { 2189 printk(KERN_ERR "udf: udf_count_free failed\n"); 2190 goto out; 2191 } else if (ident != TAG_IDENT_SBD) { 2192 brelse(bh); 2193 printk(KERN_ERR "udf: udf_count_free failed\n"); 2194 goto out; 2195 } 2196 2197 bm = (struct spaceBitmapDesc *)bh->b_data; 2198 bytes = le32_to_cpu(bm->numOfBytes); 2199 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ 2200 ptr = (uint8_t *)bh->b_data; 2201 2202 while (bytes > 0) { 2203 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); 2204 accum += bitmap_weight((const unsigned long *)(ptr + index), 2205 cur_bytes * 8); 2206 bytes -= cur_bytes; 2207 if (bytes) { 2208 brelse(bh); 2209 newblock = udf_get_lb_pblock(sb, &loc, ++block); 2210 bh = udf_tread(sb, newblock); 2211 if (!bh) { 2212 udf_debug("read failed\n"); 2213 goto out; 2214 } 2215 index = 0; 2216 ptr = (uint8_t *)bh->b_data; 2217 } 2218 } 2219 brelse(bh); 2220 2221 out: 2222 unlock_kernel(); 2223 2224 return accum; 2225 } 2226 2227 static unsigned int udf_count_free_table(struct super_block *sb, 2228 struct inode *table) 2229 { 2230 unsigned int accum = 0; 2231 uint32_t elen; 2232 struct kernel_lb_addr eloc; 2233 int8_t etype; 2234 struct extent_position epos; 2235 2236 lock_kernel(); 2237 2238 epos.block = UDF_I(table)->i_location; 2239 epos.offset = sizeof(struct unallocSpaceEntry); 2240 epos.bh = NULL; 2241 2242 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) 2243 accum += (elen >> table->i_sb->s_blocksize_bits); 2244 2245 brelse(epos.bh); 2246 2247 unlock_kernel(); 2248 2249 return accum; 2250 } 2251 2252 static unsigned int udf_count_free(struct super_block *sb) 2253 { 2254 unsigned int accum = 0; 2255 struct udf_sb_info *sbi; 2256 struct udf_part_map *map; 2257 2258 sbi = UDF_SB(sb); 2259 if (sbi->s_lvid_bh) { 2260 struct logicalVolIntegrityDesc *lvid = 2261 (struct logicalVolIntegrityDesc *) 2262 sbi->s_lvid_bh->b_data; 2263 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { 2264 accum = le32_to_cpu( 2265 lvid->freeSpaceTable[sbi->s_partition]); 2266 if (accum == 0xFFFFFFFF) 2267 accum = 0; 2268 } 2269 } 2270 2271 if (accum) 2272 return accum; 2273 2274 map = &sbi->s_partmaps[sbi->s_partition]; 2275 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { 2276 accum += udf_count_free_bitmap(sb, 2277 map->s_uspace.s_bitmap); 2278 } 2279 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { 2280 accum += udf_count_free_bitmap(sb, 2281 map->s_fspace.s_bitmap); 2282 } 2283 if (accum) 2284 return accum; 2285 2286 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { 2287 accum += udf_count_free_table(sb, 2288 map->s_uspace.s_table); 2289 } 2290 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { 2291 accum += udf_count_free_table(sb, 2292 map->s_fspace.s_table); 2293 } 2294 2295 return accum; 2296 } 2297