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/buffer_head.h> 52 #include <linux/vfs.h> 53 #include <linux/vmalloc.h> 54 #include <linux/errno.h> 55 #include <linux/mount.h> 56 #include <linux/seq_file.h> 57 #include <linux/bitmap.h> 58 #include <linux/crc-itu-t.h> 59 #include <asm/byteorder.h> 60 61 #include "udf_sb.h" 62 #include "udf_i.h" 63 64 #include <linux/init.h> 65 #include <asm/uaccess.h> 66 67 #define VDS_POS_PRIMARY_VOL_DESC 0 68 #define VDS_POS_UNALLOC_SPACE_DESC 1 69 #define VDS_POS_LOGICAL_VOL_DESC 2 70 #define VDS_POS_PARTITION_DESC 3 71 #define VDS_POS_IMP_USE_VOL_DESC 4 72 #define VDS_POS_VOL_DESC_PTR 5 73 #define VDS_POS_TERMINATING_DESC 6 74 #define VDS_POS_LENGTH 7 75 76 #define UDF_DEFAULT_BLOCKSIZE 2048 77 78 enum { UDF_MAX_LINKS = 0xffff }; 79 80 /* These are the "meat" - everything else is stuffing */ 81 static int udf_fill_super(struct super_block *, void *, int); 82 static void udf_put_super(struct super_block *); 83 static int udf_sync_fs(struct super_block *, int); 84 static int udf_remount_fs(struct super_block *, int *, char *); 85 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); 86 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, 87 struct kernel_lb_addr *); 88 static void udf_load_fileset(struct super_block *, struct buffer_head *, 89 struct kernel_lb_addr *); 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 static int udf_show_options(struct seq_file *, struct dentry *); 95 96 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) 97 { 98 struct logicalVolIntegrityDesc *lvid = 99 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; 100 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); 101 __u32 offset = number_of_partitions * 2 * 102 sizeof(uint32_t)/sizeof(uint8_t); 103 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); 104 } 105 106 /* UDF filesystem type */ 107 static struct dentry *udf_mount(struct file_system_type *fs_type, 108 int flags, const char *dev_name, void *data) 109 { 110 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); 111 } 112 113 static struct file_system_type udf_fstype = { 114 .owner = THIS_MODULE, 115 .name = "udf", 116 .mount = udf_mount, 117 .kill_sb = kill_block_super, 118 .fs_flags = FS_REQUIRES_DEV, 119 }; 120 121 static struct kmem_cache *udf_inode_cachep; 122 123 static struct inode *udf_alloc_inode(struct super_block *sb) 124 { 125 struct udf_inode_info *ei; 126 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); 127 if (!ei) 128 return NULL; 129 130 ei->i_unique = 0; 131 ei->i_lenExtents = 0; 132 ei->i_next_alloc_block = 0; 133 ei->i_next_alloc_goal = 0; 134 ei->i_strat4096 = 0; 135 init_rwsem(&ei->i_data_sem); 136 137 return &ei->vfs_inode; 138 } 139 140 static void udf_i_callback(struct rcu_head *head) 141 { 142 struct inode *inode = container_of(head, struct inode, i_rcu); 143 kmem_cache_free(udf_inode_cachep, UDF_I(inode)); 144 } 145 146 static void udf_destroy_inode(struct inode *inode) 147 { 148 call_rcu(&inode->i_rcu, udf_i_callback); 149 } 150 151 static void init_once(void *foo) 152 { 153 struct udf_inode_info *ei = (struct udf_inode_info *)foo; 154 155 ei->i_ext.i_data = NULL; 156 inode_init_once(&ei->vfs_inode); 157 } 158 159 static int init_inodecache(void) 160 { 161 udf_inode_cachep = kmem_cache_create("udf_inode_cache", 162 sizeof(struct udf_inode_info), 163 0, (SLAB_RECLAIM_ACCOUNT | 164 SLAB_MEM_SPREAD), 165 init_once); 166 if (!udf_inode_cachep) 167 return -ENOMEM; 168 return 0; 169 } 170 171 static void destroy_inodecache(void) 172 { 173 kmem_cache_destroy(udf_inode_cachep); 174 } 175 176 /* Superblock operations */ 177 static const struct super_operations udf_sb_ops = { 178 .alloc_inode = udf_alloc_inode, 179 .destroy_inode = udf_destroy_inode, 180 .write_inode = udf_write_inode, 181 .evict_inode = udf_evict_inode, 182 .put_super = udf_put_super, 183 .sync_fs = udf_sync_fs, 184 .statfs = udf_statfs, 185 .remount_fs = udf_remount_fs, 186 .show_options = udf_show_options, 187 }; 188 189 struct udf_options { 190 unsigned char novrs; 191 unsigned int blocksize; 192 unsigned int session; 193 unsigned int lastblock; 194 unsigned int anchor; 195 unsigned int volume; 196 unsigned short partition; 197 unsigned int fileset; 198 unsigned int rootdir; 199 unsigned int flags; 200 umode_t umask; 201 gid_t gid; 202 uid_t uid; 203 umode_t fmode; 204 umode_t dmode; 205 struct nls_table *nls_map; 206 }; 207 208 static int __init init_udf_fs(void) 209 { 210 int err; 211 212 err = init_inodecache(); 213 if (err) 214 goto out1; 215 err = register_filesystem(&udf_fstype); 216 if (err) 217 goto out; 218 219 return 0; 220 221 out: 222 destroy_inodecache(); 223 224 out1: 225 return err; 226 } 227 228 static void __exit exit_udf_fs(void) 229 { 230 unregister_filesystem(&udf_fstype); 231 destroy_inodecache(); 232 } 233 234 module_init(init_udf_fs) 235 module_exit(exit_udf_fs) 236 237 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) 238 { 239 struct udf_sb_info *sbi = UDF_SB(sb); 240 241 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), 242 GFP_KERNEL); 243 if (!sbi->s_partmaps) { 244 udf_err(sb, "Unable to allocate space for %d partition maps\n", 245 count); 246 sbi->s_partitions = 0; 247 return -ENOMEM; 248 } 249 250 sbi->s_partitions = count; 251 return 0; 252 } 253 254 static int udf_show_options(struct seq_file *seq, struct dentry *root) 255 { 256 struct super_block *sb = root->d_sb; 257 struct udf_sb_info *sbi = UDF_SB(sb); 258 259 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) 260 seq_puts(seq, ",nostrict"); 261 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) 262 seq_printf(seq, ",bs=%lu", sb->s_blocksize); 263 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) 264 seq_puts(seq, ",unhide"); 265 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) 266 seq_puts(seq, ",undelete"); 267 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) 268 seq_puts(seq, ",noadinicb"); 269 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) 270 seq_puts(seq, ",shortad"); 271 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) 272 seq_puts(seq, ",uid=forget"); 273 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) 274 seq_puts(seq, ",uid=ignore"); 275 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) 276 seq_puts(seq, ",gid=forget"); 277 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) 278 seq_puts(seq, ",gid=ignore"); 279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) 280 seq_printf(seq, ",uid=%u", sbi->s_uid); 281 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) 282 seq_printf(seq, ",gid=%u", sbi->s_gid); 283 if (sbi->s_umask != 0) 284 seq_printf(seq, ",umask=%ho", sbi->s_umask); 285 if (sbi->s_fmode != UDF_INVALID_MODE) 286 seq_printf(seq, ",mode=%ho", sbi->s_fmode); 287 if (sbi->s_dmode != UDF_INVALID_MODE) 288 seq_printf(seq, ",dmode=%ho", sbi->s_dmode); 289 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) 290 seq_printf(seq, ",session=%u", sbi->s_session); 291 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) 292 seq_printf(seq, ",lastblock=%u", sbi->s_last_block); 293 if (sbi->s_anchor != 0) 294 seq_printf(seq, ",anchor=%u", sbi->s_anchor); 295 /* 296 * volume, partition, fileset and rootdir seem to be ignored 297 * currently 298 */ 299 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) 300 seq_puts(seq, ",utf8"); 301 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) 302 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); 303 304 return 0; 305 } 306 307 /* 308 * udf_parse_options 309 * 310 * PURPOSE 311 * Parse mount options. 312 * 313 * DESCRIPTION 314 * The following mount options are supported: 315 * 316 * gid= Set the default group. 317 * umask= Set the default umask. 318 * mode= Set the default file permissions. 319 * dmode= Set the default directory permissions. 320 * uid= Set the default user. 321 * bs= Set the block size. 322 * unhide Show otherwise hidden files. 323 * undelete Show deleted files in lists. 324 * adinicb Embed data in the inode (default) 325 * noadinicb Don't embed data in the inode 326 * shortad Use short ad's 327 * longad Use long ad's (default) 328 * nostrict Unset strict conformance 329 * iocharset= Set the NLS character set 330 * 331 * The remaining are for debugging and disaster recovery: 332 * 333 * novrs Skip volume sequence recognition 334 * 335 * The following expect a offset from 0. 336 * 337 * session= Set the CDROM session (default= last session) 338 * anchor= Override standard anchor location. (default= 256) 339 * volume= Override the VolumeDesc location. (unused) 340 * partition= Override the PartitionDesc location. (unused) 341 * lastblock= Set the last block of the filesystem/ 342 * 343 * The following expect a offset from the partition root. 344 * 345 * fileset= Override the fileset block location. (unused) 346 * rootdir= Override the root directory location. (unused) 347 * WARNING: overriding the rootdir to a non-directory may 348 * yield highly unpredictable results. 349 * 350 * PRE-CONDITIONS 351 * options Pointer to mount options string. 352 * uopts Pointer to mount options variable. 353 * 354 * POST-CONDITIONS 355 * <return> 1 Mount options parsed okay. 356 * <return> 0 Error parsing mount options. 357 * 358 * HISTORY 359 * July 1, 1997 - Andrew E. Mileski 360 * Written, tested, and released. 361 */ 362 363 enum { 364 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, 365 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, 366 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, 367 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, 368 Opt_rootdir, Opt_utf8, Opt_iocharset, 369 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, 370 Opt_fmode, Opt_dmode 371 }; 372 373 static const match_table_t tokens = { 374 {Opt_novrs, "novrs"}, 375 {Opt_nostrict, "nostrict"}, 376 {Opt_bs, "bs=%u"}, 377 {Opt_unhide, "unhide"}, 378 {Opt_undelete, "undelete"}, 379 {Opt_noadinicb, "noadinicb"}, 380 {Opt_adinicb, "adinicb"}, 381 {Opt_shortad, "shortad"}, 382 {Opt_longad, "longad"}, 383 {Opt_uforget, "uid=forget"}, 384 {Opt_uignore, "uid=ignore"}, 385 {Opt_gforget, "gid=forget"}, 386 {Opt_gignore, "gid=ignore"}, 387 {Opt_gid, "gid=%u"}, 388 {Opt_uid, "uid=%u"}, 389 {Opt_umask, "umask=%o"}, 390 {Opt_session, "session=%u"}, 391 {Opt_lastblock, "lastblock=%u"}, 392 {Opt_anchor, "anchor=%u"}, 393 {Opt_volume, "volume=%u"}, 394 {Opt_partition, "partition=%u"}, 395 {Opt_fileset, "fileset=%u"}, 396 {Opt_rootdir, "rootdir=%u"}, 397 {Opt_utf8, "utf8"}, 398 {Opt_iocharset, "iocharset=%s"}, 399 {Opt_fmode, "mode=%o"}, 400 {Opt_dmode, "dmode=%o"}, 401 {Opt_err, NULL} 402 }; 403 404 static int udf_parse_options(char *options, struct udf_options *uopt, 405 bool remount) 406 { 407 char *p; 408 int option; 409 410 uopt->novrs = 0; 411 uopt->partition = 0xFFFF; 412 uopt->session = 0xFFFFFFFF; 413 uopt->lastblock = 0; 414 uopt->anchor = 0; 415 uopt->volume = 0xFFFFFFFF; 416 uopt->rootdir = 0xFFFFFFFF; 417 uopt->fileset = 0xFFFFFFFF; 418 uopt->nls_map = NULL; 419 420 if (!options) 421 return 1; 422 423 while ((p = strsep(&options, ",")) != NULL) { 424 substring_t args[MAX_OPT_ARGS]; 425 int token; 426 if (!*p) 427 continue; 428 429 token = match_token(p, tokens, args); 430 switch (token) { 431 case Opt_novrs: 432 uopt->novrs = 1; 433 break; 434 case Opt_bs: 435 if (match_int(&args[0], &option)) 436 return 0; 437 uopt->blocksize = option; 438 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); 439 break; 440 case Opt_unhide: 441 uopt->flags |= (1 << UDF_FLAG_UNHIDE); 442 break; 443 case Opt_undelete: 444 uopt->flags |= (1 << UDF_FLAG_UNDELETE); 445 break; 446 case Opt_noadinicb: 447 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); 448 break; 449 case Opt_adinicb: 450 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); 451 break; 452 case Opt_shortad: 453 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); 454 break; 455 case Opt_longad: 456 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); 457 break; 458 case Opt_gid: 459 if (match_int(args, &option)) 460 return 0; 461 uopt->gid = option; 462 uopt->flags |= (1 << UDF_FLAG_GID_SET); 463 break; 464 case Opt_uid: 465 if (match_int(args, &option)) 466 return 0; 467 uopt->uid = option; 468 uopt->flags |= (1 << UDF_FLAG_UID_SET); 469 break; 470 case Opt_umask: 471 if (match_octal(args, &option)) 472 return 0; 473 uopt->umask = option; 474 break; 475 case Opt_nostrict: 476 uopt->flags &= ~(1 << UDF_FLAG_STRICT); 477 break; 478 case Opt_session: 479 if (match_int(args, &option)) 480 return 0; 481 uopt->session = option; 482 if (!remount) 483 uopt->flags |= (1 << UDF_FLAG_SESSION_SET); 484 break; 485 case Opt_lastblock: 486 if (match_int(args, &option)) 487 return 0; 488 uopt->lastblock = option; 489 if (!remount) 490 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); 491 break; 492 case Opt_anchor: 493 if (match_int(args, &option)) 494 return 0; 495 uopt->anchor = option; 496 break; 497 case Opt_volume: 498 if (match_int(args, &option)) 499 return 0; 500 uopt->volume = option; 501 break; 502 case Opt_partition: 503 if (match_int(args, &option)) 504 return 0; 505 uopt->partition = option; 506 break; 507 case Opt_fileset: 508 if (match_int(args, &option)) 509 return 0; 510 uopt->fileset = option; 511 break; 512 case Opt_rootdir: 513 if (match_int(args, &option)) 514 return 0; 515 uopt->rootdir = option; 516 break; 517 case Opt_utf8: 518 uopt->flags |= (1 << UDF_FLAG_UTF8); 519 break; 520 #ifdef CONFIG_UDF_NLS 521 case Opt_iocharset: 522 uopt->nls_map = load_nls(args[0].from); 523 uopt->flags |= (1 << UDF_FLAG_NLS_MAP); 524 break; 525 #endif 526 case Opt_uignore: 527 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); 528 break; 529 case Opt_uforget: 530 uopt->flags |= (1 << UDF_FLAG_UID_FORGET); 531 break; 532 case Opt_gignore: 533 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); 534 break; 535 case Opt_gforget: 536 uopt->flags |= (1 << UDF_FLAG_GID_FORGET); 537 break; 538 case Opt_fmode: 539 if (match_octal(args, &option)) 540 return 0; 541 uopt->fmode = option & 0777; 542 break; 543 case Opt_dmode: 544 if (match_octal(args, &option)) 545 return 0; 546 uopt->dmode = option & 0777; 547 break; 548 default: 549 pr_err("bad mount option \"%s\" or missing value\n", p); 550 return 0; 551 } 552 } 553 return 1; 554 } 555 556 static int udf_remount_fs(struct super_block *sb, int *flags, char *options) 557 { 558 struct udf_options uopt; 559 struct udf_sb_info *sbi = UDF_SB(sb); 560 int error = 0; 561 562 uopt.flags = sbi->s_flags; 563 uopt.uid = sbi->s_uid; 564 uopt.gid = sbi->s_gid; 565 uopt.umask = sbi->s_umask; 566 uopt.fmode = sbi->s_fmode; 567 uopt.dmode = sbi->s_dmode; 568 569 if (!udf_parse_options(options, &uopt, true)) 570 return -EINVAL; 571 572 write_lock(&sbi->s_cred_lock); 573 sbi->s_flags = uopt.flags; 574 sbi->s_uid = uopt.uid; 575 sbi->s_gid = uopt.gid; 576 sbi->s_umask = uopt.umask; 577 sbi->s_fmode = uopt.fmode; 578 sbi->s_dmode = uopt.dmode; 579 write_unlock(&sbi->s_cred_lock); 580 581 if (sbi->s_lvid_bh) { 582 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); 583 if (write_rev > UDF_MAX_WRITE_VERSION) 584 *flags |= MS_RDONLY; 585 } 586 587 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 588 goto out_unlock; 589 590 if (*flags & MS_RDONLY) 591 udf_close_lvid(sb); 592 else 593 udf_open_lvid(sb); 594 595 out_unlock: 596 return error; 597 } 598 599 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ 600 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ 601 static loff_t udf_check_vsd(struct super_block *sb) 602 { 603 struct volStructDesc *vsd = NULL; 604 loff_t sector = 32768; 605 int sectorsize; 606 struct buffer_head *bh = NULL; 607 int nsr02 = 0; 608 int nsr03 = 0; 609 struct udf_sb_info *sbi; 610 611 sbi = UDF_SB(sb); 612 if (sb->s_blocksize < sizeof(struct volStructDesc)) 613 sectorsize = sizeof(struct volStructDesc); 614 else 615 sectorsize = sb->s_blocksize; 616 617 sector += (sbi->s_session << sb->s_blocksize_bits); 618 619 udf_debug("Starting at sector %u (%ld byte sectors)\n", 620 (unsigned int)(sector >> sb->s_blocksize_bits), 621 sb->s_blocksize); 622 /* Process the sequence (if applicable) */ 623 for (; !nsr02 && !nsr03; sector += sectorsize) { 624 /* Read a block */ 625 bh = udf_tread(sb, sector >> sb->s_blocksize_bits); 626 if (!bh) 627 break; 628 629 /* Look for ISO descriptors */ 630 vsd = (struct volStructDesc *)(bh->b_data + 631 (sector & (sb->s_blocksize - 1))); 632 633 if (vsd->stdIdent[0] == 0) { 634 brelse(bh); 635 break; 636 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, 637 VSD_STD_ID_LEN)) { 638 switch (vsd->structType) { 639 case 0: 640 udf_debug("ISO9660 Boot Record found\n"); 641 break; 642 case 1: 643 udf_debug("ISO9660 Primary Volume Descriptor found\n"); 644 break; 645 case 2: 646 udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); 647 break; 648 case 3: 649 udf_debug("ISO9660 Volume Partition Descriptor found\n"); 650 break; 651 case 255: 652 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); 653 break; 654 default: 655 udf_debug("ISO9660 VRS (%u) found\n", 656 vsd->structType); 657 break; 658 } 659 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, 660 VSD_STD_ID_LEN)) 661 ; /* nothing */ 662 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, 663 VSD_STD_ID_LEN)) { 664 brelse(bh); 665 break; 666 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, 667 VSD_STD_ID_LEN)) 668 nsr02 = sector; 669 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, 670 VSD_STD_ID_LEN)) 671 nsr03 = sector; 672 brelse(bh); 673 } 674 675 if (nsr03) 676 return nsr03; 677 else if (nsr02) 678 return nsr02; 679 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) 680 return -1; 681 else 682 return 0; 683 } 684 685 static int udf_find_fileset(struct super_block *sb, 686 struct kernel_lb_addr *fileset, 687 struct kernel_lb_addr *root) 688 { 689 struct buffer_head *bh = NULL; 690 long lastblock; 691 uint16_t ident; 692 struct udf_sb_info *sbi; 693 694 if (fileset->logicalBlockNum != 0xFFFFFFFF || 695 fileset->partitionReferenceNum != 0xFFFF) { 696 bh = udf_read_ptagged(sb, fileset, 0, &ident); 697 698 if (!bh) { 699 return 1; 700 } else if (ident != TAG_IDENT_FSD) { 701 brelse(bh); 702 return 1; 703 } 704 705 } 706 707 sbi = UDF_SB(sb); 708 if (!bh) { 709 /* Search backwards through the partitions */ 710 struct kernel_lb_addr newfileset; 711 712 /* --> cvg: FIXME - is it reasonable? */ 713 return 1; 714 715 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; 716 (newfileset.partitionReferenceNum != 0xFFFF && 717 fileset->logicalBlockNum == 0xFFFFFFFF && 718 fileset->partitionReferenceNum == 0xFFFF); 719 newfileset.partitionReferenceNum--) { 720 lastblock = sbi->s_partmaps 721 [newfileset.partitionReferenceNum] 722 .s_partition_len; 723 newfileset.logicalBlockNum = 0; 724 725 do { 726 bh = udf_read_ptagged(sb, &newfileset, 0, 727 &ident); 728 if (!bh) { 729 newfileset.logicalBlockNum++; 730 continue; 731 } 732 733 switch (ident) { 734 case TAG_IDENT_SBD: 735 { 736 struct spaceBitmapDesc *sp; 737 sp = (struct spaceBitmapDesc *) 738 bh->b_data; 739 newfileset.logicalBlockNum += 1 + 740 ((le32_to_cpu(sp->numOfBytes) + 741 sizeof(struct spaceBitmapDesc) 742 - 1) >> sb->s_blocksize_bits); 743 brelse(bh); 744 break; 745 } 746 case TAG_IDENT_FSD: 747 *fileset = newfileset; 748 break; 749 default: 750 newfileset.logicalBlockNum++; 751 brelse(bh); 752 bh = NULL; 753 break; 754 } 755 } while (newfileset.logicalBlockNum < lastblock && 756 fileset->logicalBlockNum == 0xFFFFFFFF && 757 fileset->partitionReferenceNum == 0xFFFF); 758 } 759 } 760 761 if ((fileset->logicalBlockNum != 0xFFFFFFFF || 762 fileset->partitionReferenceNum != 0xFFFF) && bh) { 763 udf_debug("Fileset at block=%d, partition=%d\n", 764 fileset->logicalBlockNum, 765 fileset->partitionReferenceNum); 766 767 sbi->s_partition = fileset->partitionReferenceNum; 768 udf_load_fileset(sb, bh, root); 769 brelse(bh); 770 return 0; 771 } 772 return 1; 773 } 774 775 static int udf_load_pvoldesc(struct super_block *sb, sector_t block) 776 { 777 struct primaryVolDesc *pvoldesc; 778 struct ustr *instr, *outstr; 779 struct buffer_head *bh; 780 uint16_t ident; 781 int ret = 1; 782 783 instr = kmalloc(sizeof(struct ustr), GFP_NOFS); 784 if (!instr) 785 return 1; 786 787 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); 788 if (!outstr) 789 goto out1; 790 791 bh = udf_read_tagged(sb, block, block, &ident); 792 if (!bh) 793 goto out2; 794 795 BUG_ON(ident != TAG_IDENT_PVD); 796 797 pvoldesc = (struct primaryVolDesc *)bh->b_data; 798 799 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, 800 pvoldesc->recordingDateAndTime)) { 801 #ifdef UDFFS_DEBUG 802 struct timestamp *ts = &pvoldesc->recordingDateAndTime; 803 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", 804 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, 805 ts->minute, le16_to_cpu(ts->typeAndTimezone)); 806 #endif 807 } 808 809 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) 810 if (udf_CS0toUTF8(outstr, instr)) { 811 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, 812 outstr->u_len > 31 ? 31 : outstr->u_len); 813 udf_debug("volIdent[] = '%s'\n", 814 UDF_SB(sb)->s_volume_ident); 815 } 816 817 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) 818 if (udf_CS0toUTF8(outstr, instr)) 819 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); 820 821 brelse(bh); 822 ret = 0; 823 out2: 824 kfree(outstr); 825 out1: 826 kfree(instr); 827 return ret; 828 } 829 830 struct inode *udf_find_metadata_inode_efe(struct super_block *sb, 831 u32 meta_file_loc, u32 partition_num) 832 { 833 struct kernel_lb_addr addr; 834 struct inode *metadata_fe; 835 836 addr.logicalBlockNum = meta_file_loc; 837 addr.partitionReferenceNum = partition_num; 838 839 metadata_fe = udf_iget(sb, &addr); 840 841 if (metadata_fe == NULL) 842 udf_warn(sb, "metadata inode efe not found\n"); 843 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { 844 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); 845 iput(metadata_fe); 846 metadata_fe = NULL; 847 } 848 849 return metadata_fe; 850 } 851 852 static int udf_load_metadata_files(struct super_block *sb, int partition) 853 { 854 struct udf_sb_info *sbi = UDF_SB(sb); 855 struct udf_part_map *map; 856 struct udf_meta_data *mdata; 857 struct kernel_lb_addr addr; 858 859 map = &sbi->s_partmaps[partition]; 860 mdata = &map->s_type_specific.s_metadata; 861 862 /* metadata address */ 863 udf_debug("Metadata file location: block = %d part = %d\n", 864 mdata->s_meta_file_loc, map->s_partition_num); 865 866 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, 867 mdata->s_meta_file_loc, map->s_partition_num); 868 869 if (mdata->s_metadata_fe == NULL) { 870 /* mirror file entry */ 871 udf_debug("Mirror metadata file location: block = %d part = %d\n", 872 mdata->s_mirror_file_loc, map->s_partition_num); 873 874 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, 875 mdata->s_mirror_file_loc, map->s_partition_num); 876 877 if (mdata->s_mirror_fe == NULL) { 878 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); 879 goto error_exit; 880 } 881 } 882 883 /* 884 * bitmap file entry 885 * Note: 886 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) 887 */ 888 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { 889 addr.logicalBlockNum = mdata->s_bitmap_file_loc; 890 addr.partitionReferenceNum = map->s_partition_num; 891 892 udf_debug("Bitmap file location: block = %d part = %d\n", 893 addr.logicalBlockNum, addr.partitionReferenceNum); 894 895 mdata->s_bitmap_fe = udf_iget(sb, &addr); 896 897 if (mdata->s_bitmap_fe == NULL) { 898 if (sb->s_flags & MS_RDONLY) 899 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); 900 else { 901 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); 902 goto error_exit; 903 } 904 } 905 } 906 907 udf_debug("udf_load_metadata_files Ok\n"); 908 909 return 0; 910 911 error_exit: 912 return 1; 913 } 914 915 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, 916 struct kernel_lb_addr *root) 917 { 918 struct fileSetDesc *fset; 919 920 fset = (struct fileSetDesc *)bh->b_data; 921 922 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); 923 924 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); 925 926 udf_debug("Rootdir at block=%d, partition=%d\n", 927 root->logicalBlockNum, root->partitionReferenceNum); 928 } 929 930 int udf_compute_nr_groups(struct super_block *sb, u32 partition) 931 { 932 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; 933 return DIV_ROUND_UP(map->s_partition_len + 934 (sizeof(struct spaceBitmapDesc) << 3), 935 sb->s_blocksize * 8); 936 } 937 938 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) 939 { 940 struct udf_bitmap *bitmap; 941 int nr_groups; 942 int size; 943 944 nr_groups = udf_compute_nr_groups(sb, index); 945 size = sizeof(struct udf_bitmap) + 946 (sizeof(struct buffer_head *) * nr_groups); 947 948 if (size <= PAGE_SIZE) 949 bitmap = kzalloc(size, GFP_KERNEL); 950 else 951 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ 952 953 if (bitmap == NULL) 954 return NULL; 955 956 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); 957 bitmap->s_nr_groups = nr_groups; 958 return bitmap; 959 } 960 961 static int udf_fill_partdesc_info(struct super_block *sb, 962 struct partitionDesc *p, int p_index) 963 { 964 struct udf_part_map *map; 965 struct udf_sb_info *sbi = UDF_SB(sb); 966 struct partitionHeaderDesc *phd; 967 968 map = &sbi->s_partmaps[p_index]; 969 970 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ 971 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); 972 973 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) 974 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; 975 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) 976 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; 977 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) 978 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; 979 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) 980 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; 981 982 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", 983 p_index, map->s_partition_type, 984 map->s_partition_root, map->s_partition_len); 985 986 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && 987 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) 988 return 0; 989 990 phd = (struct partitionHeaderDesc *)p->partitionContentsUse; 991 if (phd->unallocSpaceTable.extLength) { 992 struct kernel_lb_addr loc = { 993 .logicalBlockNum = le32_to_cpu( 994 phd->unallocSpaceTable.extPosition), 995 .partitionReferenceNum = p_index, 996 }; 997 998 map->s_uspace.s_table = udf_iget(sb, &loc); 999 if (!map->s_uspace.s_table) { 1000 udf_debug("cannot load unallocSpaceTable (part %d)\n", 1001 p_index); 1002 return 1; 1003 } 1004 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; 1005 udf_debug("unallocSpaceTable (part %d) @ %ld\n", 1006 p_index, map->s_uspace.s_table->i_ino); 1007 } 1008 1009 if (phd->unallocSpaceBitmap.extLength) { 1010 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); 1011 if (!bitmap) 1012 return 1; 1013 map->s_uspace.s_bitmap = bitmap; 1014 bitmap->s_extLength = le32_to_cpu( 1015 phd->unallocSpaceBitmap.extLength); 1016 bitmap->s_extPosition = le32_to_cpu( 1017 phd->unallocSpaceBitmap.extPosition); 1018 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; 1019 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", 1020 p_index, bitmap->s_extPosition); 1021 } 1022 1023 if (phd->partitionIntegrityTable.extLength) 1024 udf_debug("partitionIntegrityTable (part %d)\n", p_index); 1025 1026 if (phd->freedSpaceTable.extLength) { 1027 struct kernel_lb_addr loc = { 1028 .logicalBlockNum = le32_to_cpu( 1029 phd->freedSpaceTable.extPosition), 1030 .partitionReferenceNum = p_index, 1031 }; 1032 1033 map->s_fspace.s_table = udf_iget(sb, &loc); 1034 if (!map->s_fspace.s_table) { 1035 udf_debug("cannot load freedSpaceTable (part %d)\n", 1036 p_index); 1037 return 1; 1038 } 1039 1040 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; 1041 udf_debug("freedSpaceTable (part %d) @ %ld\n", 1042 p_index, map->s_fspace.s_table->i_ino); 1043 } 1044 1045 if (phd->freedSpaceBitmap.extLength) { 1046 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); 1047 if (!bitmap) 1048 return 1; 1049 map->s_fspace.s_bitmap = bitmap; 1050 bitmap->s_extLength = le32_to_cpu( 1051 phd->freedSpaceBitmap.extLength); 1052 bitmap->s_extPosition = le32_to_cpu( 1053 phd->freedSpaceBitmap.extPosition); 1054 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; 1055 udf_debug("freedSpaceBitmap (part %d) @ %d\n", 1056 p_index, bitmap->s_extPosition); 1057 } 1058 return 0; 1059 } 1060 1061 static void udf_find_vat_block(struct super_block *sb, int p_index, 1062 int type1_index, sector_t start_block) 1063 { 1064 struct udf_sb_info *sbi = UDF_SB(sb); 1065 struct udf_part_map *map = &sbi->s_partmaps[p_index]; 1066 sector_t vat_block; 1067 struct kernel_lb_addr ino; 1068 1069 /* 1070 * VAT file entry is in the last recorded block. Some broken disks have 1071 * it a few blocks before so try a bit harder... 1072 */ 1073 ino.partitionReferenceNum = type1_index; 1074 for (vat_block = start_block; 1075 vat_block >= map->s_partition_root && 1076 vat_block >= start_block - 3 && 1077 !sbi->s_vat_inode; vat_block--) { 1078 ino.logicalBlockNum = vat_block - map->s_partition_root; 1079 sbi->s_vat_inode = udf_iget(sb, &ino); 1080 } 1081 } 1082 1083 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) 1084 { 1085 struct udf_sb_info *sbi = UDF_SB(sb); 1086 struct udf_part_map *map = &sbi->s_partmaps[p_index]; 1087 struct buffer_head *bh = NULL; 1088 struct udf_inode_info *vati; 1089 uint32_t pos; 1090 struct virtualAllocationTable20 *vat20; 1091 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 1092 1093 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); 1094 if (!sbi->s_vat_inode && 1095 sbi->s_last_block != blocks - 1) { 1096 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", 1097 (unsigned long)sbi->s_last_block, 1098 (unsigned long)blocks - 1); 1099 udf_find_vat_block(sb, p_index, type1_index, blocks - 1); 1100 } 1101 if (!sbi->s_vat_inode) 1102 return 1; 1103 1104 if (map->s_partition_type == UDF_VIRTUAL_MAP15) { 1105 map->s_type_specific.s_virtual.s_start_offset = 0; 1106 map->s_type_specific.s_virtual.s_num_entries = 1107 (sbi->s_vat_inode->i_size - 36) >> 2; 1108 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { 1109 vati = UDF_I(sbi->s_vat_inode); 1110 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 1111 pos = udf_block_map(sbi->s_vat_inode, 0); 1112 bh = sb_bread(sb, pos); 1113 if (!bh) 1114 return 1; 1115 vat20 = (struct virtualAllocationTable20 *)bh->b_data; 1116 } else { 1117 vat20 = (struct virtualAllocationTable20 *) 1118 vati->i_ext.i_data; 1119 } 1120 1121 map->s_type_specific.s_virtual.s_start_offset = 1122 le16_to_cpu(vat20->lengthHeader); 1123 map->s_type_specific.s_virtual.s_num_entries = 1124 (sbi->s_vat_inode->i_size - 1125 map->s_type_specific.s_virtual. 1126 s_start_offset) >> 2; 1127 brelse(bh); 1128 } 1129 return 0; 1130 } 1131 1132 static int udf_load_partdesc(struct super_block *sb, sector_t block) 1133 { 1134 struct buffer_head *bh; 1135 struct partitionDesc *p; 1136 struct udf_part_map *map; 1137 struct udf_sb_info *sbi = UDF_SB(sb); 1138 int i, type1_idx; 1139 uint16_t partitionNumber; 1140 uint16_t ident; 1141 int ret = 0; 1142 1143 bh = udf_read_tagged(sb, block, block, &ident); 1144 if (!bh) 1145 return 1; 1146 if (ident != TAG_IDENT_PD) 1147 goto out_bh; 1148 1149 p = (struct partitionDesc *)bh->b_data; 1150 partitionNumber = le16_to_cpu(p->partitionNumber); 1151 1152 /* First scan for TYPE1, SPARABLE and METADATA partitions */ 1153 for (i = 0; i < sbi->s_partitions; i++) { 1154 map = &sbi->s_partmaps[i]; 1155 udf_debug("Searching map: (%d == %d)\n", 1156 map->s_partition_num, partitionNumber); 1157 if (map->s_partition_num == partitionNumber && 1158 (map->s_partition_type == UDF_TYPE1_MAP15 || 1159 map->s_partition_type == UDF_SPARABLE_MAP15)) 1160 break; 1161 } 1162 1163 if (i >= sbi->s_partitions) { 1164 udf_debug("Partition (%d) not found in partition map\n", 1165 partitionNumber); 1166 goto out_bh; 1167 } 1168 1169 ret = udf_fill_partdesc_info(sb, p, i); 1170 1171 /* 1172 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and 1173 * PHYSICAL partitions are already set up 1174 */ 1175 type1_idx = i; 1176 for (i = 0; i < sbi->s_partitions; i++) { 1177 map = &sbi->s_partmaps[i]; 1178 1179 if (map->s_partition_num == partitionNumber && 1180 (map->s_partition_type == UDF_VIRTUAL_MAP15 || 1181 map->s_partition_type == UDF_VIRTUAL_MAP20 || 1182 map->s_partition_type == UDF_METADATA_MAP25)) 1183 break; 1184 } 1185 1186 if (i >= sbi->s_partitions) 1187 goto out_bh; 1188 1189 ret = udf_fill_partdesc_info(sb, p, i); 1190 if (ret) 1191 goto out_bh; 1192 1193 if (map->s_partition_type == UDF_METADATA_MAP25) { 1194 ret = udf_load_metadata_files(sb, i); 1195 if (ret) { 1196 udf_err(sb, "error loading MetaData partition map %d\n", 1197 i); 1198 goto out_bh; 1199 } 1200 } else { 1201 ret = udf_load_vat(sb, i, type1_idx); 1202 if (ret) 1203 goto out_bh; 1204 /* 1205 * Mark filesystem read-only if we have a partition with 1206 * virtual map since we don't handle writing to it (we 1207 * overwrite blocks instead of relocating them). 1208 */ 1209 sb->s_flags |= MS_RDONLY; 1210 pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); 1211 } 1212 out_bh: 1213 /* In case loading failed, we handle cleanup in udf_fill_super */ 1214 brelse(bh); 1215 return ret; 1216 } 1217 1218 static int udf_load_logicalvol(struct super_block *sb, sector_t block, 1219 struct kernel_lb_addr *fileset) 1220 { 1221 struct logicalVolDesc *lvd; 1222 int i, j, offset; 1223 uint8_t type; 1224 struct udf_sb_info *sbi = UDF_SB(sb); 1225 struct genericPartitionMap *gpm; 1226 uint16_t ident; 1227 struct buffer_head *bh; 1228 int ret = 0; 1229 1230 bh = udf_read_tagged(sb, block, block, &ident); 1231 if (!bh) 1232 return 1; 1233 BUG_ON(ident != TAG_IDENT_LVD); 1234 lvd = (struct logicalVolDesc *)bh->b_data; 1235 1236 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); 1237 if (i != 0) { 1238 ret = i; 1239 goto out_bh; 1240 } 1241 1242 for (i = 0, offset = 0; 1243 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); 1244 i++, offset += gpm->partitionMapLength) { 1245 struct udf_part_map *map = &sbi->s_partmaps[i]; 1246 gpm = (struct genericPartitionMap *) 1247 &(lvd->partitionMaps[offset]); 1248 type = gpm->partitionMapType; 1249 if (type == 1) { 1250 struct genericPartitionMap1 *gpm1 = 1251 (struct genericPartitionMap1 *)gpm; 1252 map->s_partition_type = UDF_TYPE1_MAP15; 1253 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); 1254 map->s_partition_num = le16_to_cpu(gpm1->partitionNum); 1255 map->s_partition_func = NULL; 1256 } else if (type == 2) { 1257 struct udfPartitionMap2 *upm2 = 1258 (struct udfPartitionMap2 *)gpm; 1259 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, 1260 strlen(UDF_ID_VIRTUAL))) { 1261 u16 suf = 1262 le16_to_cpu(((__le16 *)upm2->partIdent. 1263 identSuffix)[0]); 1264 if (suf < 0x0200) { 1265 map->s_partition_type = 1266 UDF_VIRTUAL_MAP15; 1267 map->s_partition_func = 1268 udf_get_pblock_virt15; 1269 } else { 1270 map->s_partition_type = 1271 UDF_VIRTUAL_MAP20; 1272 map->s_partition_func = 1273 udf_get_pblock_virt20; 1274 } 1275 } else if (!strncmp(upm2->partIdent.ident, 1276 UDF_ID_SPARABLE, 1277 strlen(UDF_ID_SPARABLE))) { 1278 uint32_t loc; 1279 struct sparingTable *st; 1280 struct sparablePartitionMap *spm = 1281 (struct sparablePartitionMap *)gpm; 1282 1283 map->s_partition_type = UDF_SPARABLE_MAP15; 1284 map->s_type_specific.s_sparing.s_packet_len = 1285 le16_to_cpu(spm->packetLength); 1286 for (j = 0; j < spm->numSparingTables; j++) { 1287 struct buffer_head *bh2; 1288 1289 loc = le32_to_cpu( 1290 spm->locSparingTable[j]); 1291 bh2 = udf_read_tagged(sb, loc, loc, 1292 &ident); 1293 map->s_type_specific.s_sparing. 1294 s_spar_map[j] = bh2; 1295 1296 if (bh2 == NULL) 1297 continue; 1298 1299 st = (struct sparingTable *)bh2->b_data; 1300 if (ident != 0 || strncmp( 1301 st->sparingIdent.ident, 1302 UDF_ID_SPARING, 1303 strlen(UDF_ID_SPARING))) { 1304 brelse(bh2); 1305 map->s_type_specific.s_sparing. 1306 s_spar_map[j] = NULL; 1307 } 1308 } 1309 map->s_partition_func = udf_get_pblock_spar15; 1310 } else if (!strncmp(upm2->partIdent.ident, 1311 UDF_ID_METADATA, 1312 strlen(UDF_ID_METADATA))) { 1313 struct udf_meta_data *mdata = 1314 &map->s_type_specific.s_metadata; 1315 struct metadataPartitionMap *mdm = 1316 (struct metadataPartitionMap *) 1317 &(lvd->partitionMaps[offset]); 1318 udf_debug("Parsing Logical vol part %d type %d id=%s\n", 1319 i, type, UDF_ID_METADATA); 1320 1321 map->s_partition_type = UDF_METADATA_MAP25; 1322 map->s_partition_func = udf_get_pblock_meta25; 1323 1324 mdata->s_meta_file_loc = 1325 le32_to_cpu(mdm->metadataFileLoc); 1326 mdata->s_mirror_file_loc = 1327 le32_to_cpu(mdm->metadataMirrorFileLoc); 1328 mdata->s_bitmap_file_loc = 1329 le32_to_cpu(mdm->metadataBitmapFileLoc); 1330 mdata->s_alloc_unit_size = 1331 le32_to_cpu(mdm->allocUnitSize); 1332 mdata->s_align_unit_size = 1333 le16_to_cpu(mdm->alignUnitSize); 1334 if (mdm->flags & 0x01) 1335 mdata->s_flags |= MF_DUPLICATE_MD; 1336 1337 udf_debug("Metadata Ident suffix=0x%x\n", 1338 le16_to_cpu(*(__le16 *) 1339 mdm->partIdent.identSuffix)); 1340 udf_debug("Metadata part num=%d\n", 1341 le16_to_cpu(mdm->partitionNum)); 1342 udf_debug("Metadata part alloc unit size=%d\n", 1343 le32_to_cpu(mdm->allocUnitSize)); 1344 udf_debug("Metadata file loc=%d\n", 1345 le32_to_cpu(mdm->metadataFileLoc)); 1346 udf_debug("Mirror file loc=%d\n", 1347 le32_to_cpu(mdm->metadataMirrorFileLoc)); 1348 udf_debug("Bitmap file loc=%d\n", 1349 le32_to_cpu(mdm->metadataBitmapFileLoc)); 1350 udf_debug("Flags: %d %d\n", 1351 mdata->s_flags, mdm->flags); 1352 } else { 1353 udf_debug("Unknown ident: %s\n", 1354 upm2->partIdent.ident); 1355 continue; 1356 } 1357 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); 1358 map->s_partition_num = le16_to_cpu(upm2->partitionNum); 1359 } 1360 udf_debug("Partition (%d:%d) type %d on volume %d\n", 1361 i, map->s_partition_num, type, map->s_volumeseqnum); 1362 } 1363 1364 if (fileset) { 1365 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); 1366 1367 *fileset = lelb_to_cpu(la->extLocation); 1368 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", 1369 fileset->logicalBlockNum, 1370 fileset->partitionReferenceNum); 1371 } 1372 if (lvd->integritySeqExt.extLength) 1373 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); 1374 1375 out_bh: 1376 brelse(bh); 1377 return ret; 1378 } 1379 1380 /* 1381 * udf_load_logicalvolint 1382 * 1383 */ 1384 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) 1385 { 1386 struct buffer_head *bh = NULL; 1387 uint16_t ident; 1388 struct udf_sb_info *sbi = UDF_SB(sb); 1389 struct logicalVolIntegrityDesc *lvid; 1390 1391 while (loc.extLength > 0 && 1392 (bh = udf_read_tagged(sb, loc.extLocation, 1393 loc.extLocation, &ident)) && 1394 ident == TAG_IDENT_LVID) { 1395 sbi->s_lvid_bh = bh; 1396 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1397 1398 if (lvid->nextIntegrityExt.extLength) 1399 udf_load_logicalvolint(sb, 1400 leea_to_cpu(lvid->nextIntegrityExt)); 1401 1402 if (sbi->s_lvid_bh != bh) 1403 brelse(bh); 1404 loc.extLength -= sb->s_blocksize; 1405 loc.extLocation++; 1406 } 1407 if (sbi->s_lvid_bh != bh) 1408 brelse(bh); 1409 } 1410 1411 /* 1412 * udf_process_sequence 1413 * 1414 * PURPOSE 1415 * Process a main/reserve volume descriptor sequence. 1416 * 1417 * PRE-CONDITIONS 1418 * sb Pointer to _locked_ superblock. 1419 * block First block of first extent of the sequence. 1420 * lastblock Lastblock of first extent of the sequence. 1421 * 1422 * HISTORY 1423 * July 1, 1997 - Andrew E. Mileski 1424 * Written, tested, and released. 1425 */ 1426 static noinline int udf_process_sequence(struct super_block *sb, long block, 1427 long lastblock, struct kernel_lb_addr *fileset) 1428 { 1429 struct buffer_head *bh = NULL; 1430 struct udf_vds_record vds[VDS_POS_LENGTH]; 1431 struct udf_vds_record *curr; 1432 struct generic_desc *gd; 1433 struct volDescPtr *vdp; 1434 int done = 0; 1435 uint32_t vdsn; 1436 uint16_t ident; 1437 long next_s = 0, next_e = 0; 1438 1439 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); 1440 1441 /* 1442 * Read the main descriptor sequence and find which descriptors 1443 * are in it. 1444 */ 1445 for (; (!done && block <= lastblock); block++) { 1446 1447 bh = udf_read_tagged(sb, block, block, &ident); 1448 if (!bh) { 1449 udf_err(sb, 1450 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", 1451 (unsigned long long)block); 1452 return 1; 1453 } 1454 1455 /* Process each descriptor (ISO 13346 3/8.3-8.4) */ 1456 gd = (struct generic_desc *)bh->b_data; 1457 vdsn = le32_to_cpu(gd->volDescSeqNum); 1458 switch (ident) { 1459 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ 1460 curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; 1461 if (vdsn >= curr->volDescSeqNum) { 1462 curr->volDescSeqNum = vdsn; 1463 curr->block = block; 1464 } 1465 break; 1466 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ 1467 curr = &vds[VDS_POS_VOL_DESC_PTR]; 1468 if (vdsn >= curr->volDescSeqNum) { 1469 curr->volDescSeqNum = vdsn; 1470 curr->block = block; 1471 1472 vdp = (struct volDescPtr *)bh->b_data; 1473 next_s = le32_to_cpu( 1474 vdp->nextVolDescSeqExt.extLocation); 1475 next_e = le32_to_cpu( 1476 vdp->nextVolDescSeqExt.extLength); 1477 next_e = next_e >> sb->s_blocksize_bits; 1478 next_e += next_s; 1479 } 1480 break; 1481 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ 1482 curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; 1483 if (vdsn >= curr->volDescSeqNum) { 1484 curr->volDescSeqNum = vdsn; 1485 curr->block = block; 1486 } 1487 break; 1488 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ 1489 curr = &vds[VDS_POS_PARTITION_DESC]; 1490 if (!curr->block) 1491 curr->block = block; 1492 break; 1493 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ 1494 curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; 1495 if (vdsn >= curr->volDescSeqNum) { 1496 curr->volDescSeqNum = vdsn; 1497 curr->block = block; 1498 } 1499 break; 1500 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ 1501 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; 1502 if (vdsn >= curr->volDescSeqNum) { 1503 curr->volDescSeqNum = vdsn; 1504 curr->block = block; 1505 } 1506 break; 1507 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ 1508 vds[VDS_POS_TERMINATING_DESC].block = block; 1509 if (next_e) { 1510 block = next_s; 1511 lastblock = next_e; 1512 next_s = next_e = 0; 1513 } else 1514 done = 1; 1515 break; 1516 } 1517 brelse(bh); 1518 } 1519 /* 1520 * Now read interesting descriptors again and process them 1521 * in a suitable order 1522 */ 1523 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { 1524 udf_err(sb, "Primary Volume Descriptor not found!\n"); 1525 return 1; 1526 } 1527 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) 1528 return 1; 1529 1530 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, 1531 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) 1532 return 1; 1533 1534 if (vds[VDS_POS_PARTITION_DESC].block) { 1535 /* 1536 * We rescan the whole descriptor sequence to find 1537 * partition descriptor blocks and process them. 1538 */ 1539 for (block = vds[VDS_POS_PARTITION_DESC].block; 1540 block < vds[VDS_POS_TERMINATING_DESC].block; 1541 block++) 1542 if (udf_load_partdesc(sb, block)) 1543 return 1; 1544 } 1545 1546 return 0; 1547 } 1548 1549 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, 1550 struct kernel_lb_addr *fileset) 1551 { 1552 struct anchorVolDescPtr *anchor; 1553 long main_s, main_e, reserve_s, reserve_e; 1554 1555 anchor = (struct anchorVolDescPtr *)bh->b_data; 1556 1557 /* Locate the main sequence */ 1558 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); 1559 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); 1560 main_e = main_e >> sb->s_blocksize_bits; 1561 main_e += main_s; 1562 1563 /* Locate the reserve sequence */ 1564 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); 1565 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); 1566 reserve_e = reserve_e >> sb->s_blocksize_bits; 1567 reserve_e += reserve_s; 1568 1569 /* Process the main & reserve sequences */ 1570 /* responsible for finding the PartitionDesc(s) */ 1571 if (!udf_process_sequence(sb, main_s, main_e, fileset)) 1572 return 1; 1573 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset); 1574 } 1575 1576 /* 1577 * Check whether there is an anchor block in the given block and 1578 * load Volume Descriptor Sequence if so. 1579 */ 1580 static int udf_check_anchor_block(struct super_block *sb, sector_t block, 1581 struct kernel_lb_addr *fileset) 1582 { 1583 struct buffer_head *bh; 1584 uint16_t ident; 1585 int ret; 1586 1587 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && 1588 udf_fixed_to_variable(block) >= 1589 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) 1590 return 0; 1591 1592 bh = udf_read_tagged(sb, block, block, &ident); 1593 if (!bh) 1594 return 0; 1595 if (ident != TAG_IDENT_AVDP) { 1596 brelse(bh); 1597 return 0; 1598 } 1599 ret = udf_load_sequence(sb, bh, fileset); 1600 brelse(bh); 1601 return ret; 1602 } 1603 1604 /* Search for an anchor volume descriptor pointer */ 1605 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, 1606 struct kernel_lb_addr *fileset) 1607 { 1608 sector_t last[6]; 1609 int i; 1610 struct udf_sb_info *sbi = UDF_SB(sb); 1611 int last_count = 0; 1612 1613 /* First try user provided anchor */ 1614 if (sbi->s_anchor) { 1615 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) 1616 return lastblock; 1617 } 1618 /* 1619 * according to spec, anchor is in either: 1620 * block 256 1621 * lastblock-256 1622 * lastblock 1623 * however, if the disc isn't closed, it could be 512. 1624 */ 1625 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) 1626 return lastblock; 1627 /* 1628 * The trouble is which block is the last one. Drives often misreport 1629 * this so we try various possibilities. 1630 */ 1631 last[last_count++] = lastblock; 1632 if (lastblock >= 1) 1633 last[last_count++] = lastblock - 1; 1634 last[last_count++] = lastblock + 1; 1635 if (lastblock >= 2) 1636 last[last_count++] = lastblock - 2; 1637 if (lastblock >= 150) 1638 last[last_count++] = lastblock - 150; 1639 if (lastblock >= 152) 1640 last[last_count++] = lastblock - 152; 1641 1642 for (i = 0; i < last_count; i++) { 1643 if (last[i] >= sb->s_bdev->bd_inode->i_size >> 1644 sb->s_blocksize_bits) 1645 continue; 1646 if (udf_check_anchor_block(sb, last[i], fileset)) 1647 return last[i]; 1648 if (last[i] < 256) 1649 continue; 1650 if (udf_check_anchor_block(sb, last[i] - 256, fileset)) 1651 return last[i]; 1652 } 1653 1654 /* Finally try block 512 in case media is open */ 1655 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) 1656 return last[0]; 1657 return 0; 1658 } 1659 1660 /* 1661 * Find an anchor volume descriptor and load Volume Descriptor Sequence from 1662 * area specified by it. The function expects sbi->s_lastblock to be the last 1663 * block on the media. 1664 * 1665 * Return 1 if ok, 0 if not found. 1666 * 1667 */ 1668 static int udf_find_anchor(struct super_block *sb, 1669 struct kernel_lb_addr *fileset) 1670 { 1671 sector_t lastblock; 1672 struct udf_sb_info *sbi = UDF_SB(sb); 1673 1674 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); 1675 if (lastblock) 1676 goto out; 1677 1678 /* No anchor found? Try VARCONV conversion of block numbers */ 1679 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); 1680 /* Firstly, we try to not convert number of the last block */ 1681 lastblock = udf_scan_anchors(sb, 1682 udf_variable_to_fixed(sbi->s_last_block), 1683 fileset); 1684 if (lastblock) 1685 goto out; 1686 1687 /* Secondly, we try with converted number of the last block */ 1688 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); 1689 if (!lastblock) { 1690 /* VARCONV didn't help. Clear it. */ 1691 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); 1692 return 0; 1693 } 1694 out: 1695 sbi->s_last_block = lastblock; 1696 return 1; 1697 } 1698 1699 /* 1700 * Check Volume Structure Descriptor, find Anchor block and load Volume 1701 * Descriptor Sequence 1702 */ 1703 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, 1704 int silent, struct kernel_lb_addr *fileset) 1705 { 1706 struct udf_sb_info *sbi = UDF_SB(sb); 1707 loff_t nsr_off; 1708 1709 if (!sb_set_blocksize(sb, uopt->blocksize)) { 1710 if (!silent) 1711 udf_warn(sb, "Bad block size\n"); 1712 return 0; 1713 } 1714 sbi->s_last_block = uopt->lastblock; 1715 if (!uopt->novrs) { 1716 /* Check that it is NSR02 compliant */ 1717 nsr_off = udf_check_vsd(sb); 1718 if (!nsr_off) { 1719 if (!silent) 1720 udf_warn(sb, "No VRS found\n"); 1721 return 0; 1722 } 1723 if (nsr_off == -1) 1724 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); 1725 if (!sbi->s_last_block) 1726 sbi->s_last_block = udf_get_last_block(sb); 1727 } else { 1728 udf_debug("Validity check skipped because of novrs option\n"); 1729 } 1730 1731 /* Look for anchor block and load Volume Descriptor Sequence */ 1732 sbi->s_anchor = uopt->anchor; 1733 if (!udf_find_anchor(sb, fileset)) { 1734 if (!silent) 1735 udf_warn(sb, "No anchor found\n"); 1736 return 0; 1737 } 1738 return 1; 1739 } 1740 1741 static void udf_open_lvid(struct super_block *sb) 1742 { 1743 struct udf_sb_info *sbi = UDF_SB(sb); 1744 struct buffer_head *bh = sbi->s_lvid_bh; 1745 struct logicalVolIntegrityDesc *lvid; 1746 struct logicalVolIntegrityDescImpUse *lvidiu; 1747 1748 if (!bh) 1749 return; 1750 1751 mutex_lock(&sbi->s_alloc_mutex); 1752 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1753 lvidiu = udf_sb_lvidiu(sbi); 1754 1755 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1756 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1757 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, 1758 CURRENT_TIME); 1759 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); 1760 1761 lvid->descTag.descCRC = cpu_to_le16( 1762 crc_itu_t(0, (char *)lvid + sizeof(struct tag), 1763 le16_to_cpu(lvid->descTag.descCRCLength))); 1764 1765 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); 1766 mark_buffer_dirty(bh); 1767 sbi->s_lvid_dirty = 0; 1768 mutex_unlock(&sbi->s_alloc_mutex); 1769 } 1770 1771 static void udf_close_lvid(struct super_block *sb) 1772 { 1773 struct udf_sb_info *sbi = UDF_SB(sb); 1774 struct buffer_head *bh = sbi->s_lvid_bh; 1775 struct logicalVolIntegrityDesc *lvid; 1776 struct logicalVolIntegrityDescImpUse *lvidiu; 1777 1778 if (!bh) 1779 return; 1780 1781 mutex_lock(&sbi->s_alloc_mutex); 1782 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1783 lvidiu = udf_sb_lvidiu(sbi); 1784 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1785 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1786 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); 1787 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) 1788 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); 1789 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) 1790 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); 1791 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) 1792 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); 1793 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); 1794 1795 lvid->descTag.descCRC = cpu_to_le16( 1796 crc_itu_t(0, (char *)lvid + sizeof(struct tag), 1797 le16_to_cpu(lvid->descTag.descCRCLength))); 1798 1799 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); 1800 /* 1801 * We set buffer uptodate unconditionally here to avoid spurious 1802 * warnings from mark_buffer_dirty() when previous EIO has marked 1803 * the buffer as !uptodate 1804 */ 1805 set_buffer_uptodate(bh); 1806 mark_buffer_dirty(bh); 1807 sbi->s_lvid_dirty = 0; 1808 mutex_unlock(&sbi->s_alloc_mutex); 1809 } 1810 1811 u64 lvid_get_unique_id(struct super_block *sb) 1812 { 1813 struct buffer_head *bh; 1814 struct udf_sb_info *sbi = UDF_SB(sb); 1815 struct logicalVolIntegrityDesc *lvid; 1816 struct logicalVolHeaderDesc *lvhd; 1817 u64 uniqueID; 1818 u64 ret; 1819 1820 bh = sbi->s_lvid_bh; 1821 if (!bh) 1822 return 0; 1823 1824 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1825 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; 1826 1827 mutex_lock(&sbi->s_alloc_mutex); 1828 ret = uniqueID = le64_to_cpu(lvhd->uniqueID); 1829 if (!(++uniqueID & 0xFFFFFFFF)) 1830 uniqueID += 16; 1831 lvhd->uniqueID = cpu_to_le64(uniqueID); 1832 mutex_unlock(&sbi->s_alloc_mutex); 1833 mark_buffer_dirty(bh); 1834 1835 return ret; 1836 } 1837 1838 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) 1839 { 1840 int i; 1841 int nr_groups = bitmap->s_nr_groups; 1842 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * 1843 nr_groups); 1844 1845 for (i = 0; i < nr_groups; i++) 1846 if (bitmap->s_block_bitmap[i]) 1847 brelse(bitmap->s_block_bitmap[i]); 1848 1849 if (size <= PAGE_SIZE) 1850 kfree(bitmap); 1851 else 1852 vfree(bitmap); 1853 } 1854 1855 static void udf_free_partition(struct udf_part_map *map) 1856 { 1857 int i; 1858 struct udf_meta_data *mdata; 1859 1860 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) 1861 iput(map->s_uspace.s_table); 1862 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) 1863 iput(map->s_fspace.s_table); 1864 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) 1865 udf_sb_free_bitmap(map->s_uspace.s_bitmap); 1866 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) 1867 udf_sb_free_bitmap(map->s_fspace.s_bitmap); 1868 if (map->s_partition_type == UDF_SPARABLE_MAP15) 1869 for (i = 0; i < 4; i++) 1870 brelse(map->s_type_specific.s_sparing.s_spar_map[i]); 1871 else if (map->s_partition_type == UDF_METADATA_MAP25) { 1872 mdata = &map->s_type_specific.s_metadata; 1873 iput(mdata->s_metadata_fe); 1874 mdata->s_metadata_fe = NULL; 1875 1876 iput(mdata->s_mirror_fe); 1877 mdata->s_mirror_fe = NULL; 1878 1879 iput(mdata->s_bitmap_fe); 1880 mdata->s_bitmap_fe = NULL; 1881 } 1882 } 1883 1884 static int udf_fill_super(struct super_block *sb, void *options, int silent) 1885 { 1886 int i; 1887 int ret; 1888 struct inode *inode = NULL; 1889 struct udf_options uopt; 1890 struct kernel_lb_addr rootdir, fileset; 1891 struct udf_sb_info *sbi; 1892 1893 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); 1894 uopt.uid = -1; 1895 uopt.gid = -1; 1896 uopt.umask = 0; 1897 uopt.fmode = UDF_INVALID_MODE; 1898 uopt.dmode = UDF_INVALID_MODE; 1899 1900 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); 1901 if (!sbi) 1902 return -ENOMEM; 1903 1904 sb->s_fs_info = sbi; 1905 1906 mutex_init(&sbi->s_alloc_mutex); 1907 1908 if (!udf_parse_options((char *)options, &uopt, false)) 1909 goto error_out; 1910 1911 if (uopt.flags & (1 << UDF_FLAG_UTF8) && 1912 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { 1913 udf_err(sb, "utf8 cannot be combined with iocharset\n"); 1914 goto error_out; 1915 } 1916 #ifdef CONFIG_UDF_NLS 1917 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { 1918 uopt.nls_map = load_nls_default(); 1919 if (!uopt.nls_map) 1920 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); 1921 else 1922 udf_debug("Using default NLS map\n"); 1923 } 1924 #endif 1925 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) 1926 uopt.flags |= (1 << UDF_FLAG_UTF8); 1927 1928 fileset.logicalBlockNum = 0xFFFFFFFF; 1929 fileset.partitionReferenceNum = 0xFFFF; 1930 1931 sbi->s_flags = uopt.flags; 1932 sbi->s_uid = uopt.uid; 1933 sbi->s_gid = uopt.gid; 1934 sbi->s_umask = uopt.umask; 1935 sbi->s_fmode = uopt.fmode; 1936 sbi->s_dmode = uopt.dmode; 1937 sbi->s_nls_map = uopt.nls_map; 1938 rwlock_init(&sbi->s_cred_lock); 1939 1940 if (uopt.session == 0xFFFFFFFF) 1941 sbi->s_session = udf_get_last_session(sb); 1942 else 1943 sbi->s_session = uopt.session; 1944 1945 udf_debug("Multi-session=%d\n", sbi->s_session); 1946 1947 /* Fill in the rest of the superblock */ 1948 sb->s_op = &udf_sb_ops; 1949 sb->s_export_op = &udf_export_ops; 1950 1951 sb->s_dirt = 0; 1952 sb->s_magic = UDF_SUPER_MAGIC; 1953 sb->s_time_gran = 1000; 1954 1955 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { 1956 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1957 } else { 1958 uopt.blocksize = bdev_logical_block_size(sb->s_bdev); 1959 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1960 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { 1961 if (!silent) 1962 pr_notice("Rescanning with blocksize %d\n", 1963 UDF_DEFAULT_BLOCKSIZE); 1964 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; 1965 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1966 } 1967 } 1968 if (!ret) { 1969 udf_warn(sb, "No partition found (1)\n"); 1970 goto error_out; 1971 } 1972 1973 udf_debug("Lastblock=%d\n", sbi->s_last_block); 1974 1975 if (sbi->s_lvid_bh) { 1976 struct logicalVolIntegrityDescImpUse *lvidiu = 1977 udf_sb_lvidiu(sbi); 1978 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); 1979 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); 1980 /* uint16_t maxUDFWriteRev = 1981 le16_to_cpu(lvidiu->maxUDFWriteRev); */ 1982 1983 if (minUDFReadRev > UDF_MAX_READ_VERSION) { 1984 udf_err(sb, "minUDFReadRev=%x (max is %x)\n", 1985 le16_to_cpu(lvidiu->minUDFReadRev), 1986 UDF_MAX_READ_VERSION); 1987 goto error_out; 1988 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) 1989 sb->s_flags |= MS_RDONLY; 1990 1991 sbi->s_udfrev = minUDFWriteRev; 1992 1993 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) 1994 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); 1995 if (minUDFReadRev >= UDF_VERS_USE_STREAMS) 1996 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); 1997 } 1998 1999 if (!sbi->s_partitions) { 2000 udf_warn(sb, "No partition found (2)\n"); 2001 goto error_out; 2002 } 2003 2004 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & 2005 UDF_PART_FLAG_READ_ONLY) { 2006 pr_notice("Partition marked readonly; forcing readonly mount\n"); 2007 sb->s_flags |= MS_RDONLY; 2008 } 2009 2010 if (udf_find_fileset(sb, &fileset, &rootdir)) { 2011 udf_warn(sb, "No fileset found\n"); 2012 goto error_out; 2013 } 2014 2015 if (!silent) { 2016 struct timestamp ts; 2017 udf_time_to_disk_stamp(&ts, sbi->s_record_time); 2018 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", 2019 sbi->s_volume_ident, 2020 le16_to_cpu(ts.year), ts.month, ts.day, 2021 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); 2022 } 2023 if (!(sb->s_flags & MS_RDONLY)) 2024 udf_open_lvid(sb); 2025 2026 /* Assign the root inode */ 2027 /* assign inodes by physical block number */ 2028 /* perhaps it's not extensible enough, but for now ... */ 2029 inode = udf_iget(sb, &rootdir); 2030 if (!inode) { 2031 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", 2032 rootdir.logicalBlockNum, rootdir.partitionReferenceNum); 2033 goto error_out; 2034 } 2035 2036 /* Allocate a dentry for the root inode */ 2037 sb->s_root = d_make_root(inode); 2038 if (!sb->s_root) { 2039 udf_err(sb, "Couldn't allocate root dentry\n"); 2040 goto error_out; 2041 } 2042 sb->s_maxbytes = MAX_LFS_FILESIZE; 2043 sb->s_max_links = UDF_MAX_LINKS; 2044 return 0; 2045 2046 error_out: 2047 if (sbi->s_vat_inode) 2048 iput(sbi->s_vat_inode); 2049 if (sbi->s_partitions) 2050 for (i = 0; i < sbi->s_partitions; i++) 2051 udf_free_partition(&sbi->s_partmaps[i]); 2052 #ifdef CONFIG_UDF_NLS 2053 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 2054 unload_nls(sbi->s_nls_map); 2055 #endif 2056 if (!(sb->s_flags & MS_RDONLY)) 2057 udf_close_lvid(sb); 2058 brelse(sbi->s_lvid_bh); 2059 2060 kfree(sbi->s_partmaps); 2061 kfree(sbi); 2062 sb->s_fs_info = NULL; 2063 2064 return -EINVAL; 2065 } 2066 2067 void _udf_err(struct super_block *sb, const char *function, 2068 const char *fmt, ...) 2069 { 2070 struct va_format vaf; 2071 va_list args; 2072 2073 /* mark sb error */ 2074 if (!(sb->s_flags & MS_RDONLY)) 2075 sb->s_dirt = 1; 2076 2077 va_start(args, fmt); 2078 2079 vaf.fmt = fmt; 2080 vaf.va = &args; 2081 2082 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); 2083 2084 va_end(args); 2085 } 2086 2087 void _udf_warn(struct super_block *sb, const char *function, 2088 const char *fmt, ...) 2089 { 2090 struct va_format vaf; 2091 va_list args; 2092 2093 va_start(args, fmt); 2094 2095 vaf.fmt = fmt; 2096 vaf.va = &args; 2097 2098 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); 2099 2100 va_end(args); 2101 } 2102 2103 static void udf_put_super(struct super_block *sb) 2104 { 2105 int i; 2106 struct udf_sb_info *sbi; 2107 2108 sbi = UDF_SB(sb); 2109 2110 if (sbi->s_vat_inode) 2111 iput(sbi->s_vat_inode); 2112 if (sbi->s_partitions) 2113 for (i = 0; i < sbi->s_partitions; i++) 2114 udf_free_partition(&sbi->s_partmaps[i]); 2115 #ifdef CONFIG_UDF_NLS 2116 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 2117 unload_nls(sbi->s_nls_map); 2118 #endif 2119 if (!(sb->s_flags & MS_RDONLY)) 2120 udf_close_lvid(sb); 2121 brelse(sbi->s_lvid_bh); 2122 kfree(sbi->s_partmaps); 2123 kfree(sb->s_fs_info); 2124 sb->s_fs_info = NULL; 2125 } 2126 2127 static int udf_sync_fs(struct super_block *sb, int wait) 2128 { 2129 struct udf_sb_info *sbi = UDF_SB(sb); 2130 2131 mutex_lock(&sbi->s_alloc_mutex); 2132 if (sbi->s_lvid_dirty) { 2133 /* 2134 * Blockdevice will be synced later so we don't have to submit 2135 * the buffer for IO 2136 */ 2137 mark_buffer_dirty(sbi->s_lvid_bh); 2138 sb->s_dirt = 0; 2139 sbi->s_lvid_dirty = 0; 2140 } 2141 mutex_unlock(&sbi->s_alloc_mutex); 2142 2143 return 0; 2144 } 2145 2146 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) 2147 { 2148 struct super_block *sb = dentry->d_sb; 2149 struct udf_sb_info *sbi = UDF_SB(sb); 2150 struct logicalVolIntegrityDescImpUse *lvidiu; 2151 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 2152 2153 if (sbi->s_lvid_bh != NULL) 2154 lvidiu = udf_sb_lvidiu(sbi); 2155 else 2156 lvidiu = NULL; 2157 2158 buf->f_type = UDF_SUPER_MAGIC; 2159 buf->f_bsize = sb->s_blocksize; 2160 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; 2161 buf->f_bfree = udf_count_free(sb); 2162 buf->f_bavail = buf->f_bfree; 2163 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + 2164 le32_to_cpu(lvidiu->numDirs)) : 0) 2165 + buf->f_bfree; 2166 buf->f_ffree = buf->f_bfree; 2167 buf->f_namelen = UDF_NAME_LEN - 2; 2168 buf->f_fsid.val[0] = (u32)id; 2169 buf->f_fsid.val[1] = (u32)(id >> 32); 2170 2171 return 0; 2172 } 2173 2174 static unsigned int udf_count_free_bitmap(struct super_block *sb, 2175 struct udf_bitmap *bitmap) 2176 { 2177 struct buffer_head *bh = NULL; 2178 unsigned int accum = 0; 2179 int index; 2180 int block = 0, newblock; 2181 struct kernel_lb_addr loc; 2182 uint32_t bytes; 2183 uint8_t *ptr; 2184 uint16_t ident; 2185 struct spaceBitmapDesc *bm; 2186 2187 loc.logicalBlockNum = bitmap->s_extPosition; 2188 loc.partitionReferenceNum = UDF_SB(sb)->s_partition; 2189 bh = udf_read_ptagged(sb, &loc, 0, &ident); 2190 2191 if (!bh) { 2192 udf_err(sb, "udf_count_free failed\n"); 2193 goto out; 2194 } else if (ident != TAG_IDENT_SBD) { 2195 brelse(bh); 2196 udf_err(sb, "udf_count_free failed\n"); 2197 goto out; 2198 } 2199 2200 bm = (struct spaceBitmapDesc *)bh->b_data; 2201 bytes = le32_to_cpu(bm->numOfBytes); 2202 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ 2203 ptr = (uint8_t *)bh->b_data; 2204 2205 while (bytes > 0) { 2206 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); 2207 accum += bitmap_weight((const unsigned long *)(ptr + index), 2208 cur_bytes * 8); 2209 bytes -= cur_bytes; 2210 if (bytes) { 2211 brelse(bh); 2212 newblock = udf_get_lb_pblock(sb, &loc, ++block); 2213 bh = udf_tread(sb, newblock); 2214 if (!bh) { 2215 udf_debug("read failed\n"); 2216 goto out; 2217 } 2218 index = 0; 2219 ptr = (uint8_t *)bh->b_data; 2220 } 2221 } 2222 brelse(bh); 2223 out: 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 mutex_lock(&UDF_SB(sb)->s_alloc_mutex); 2237 epos.block = UDF_I(table)->i_location; 2238 epos.offset = sizeof(struct unallocSpaceEntry); 2239 epos.bh = NULL; 2240 2241 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) 2242 accum += (elen >> table->i_sb->s_blocksize_bits); 2243 2244 brelse(epos.bh); 2245 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); 2246 2247 return accum; 2248 } 2249 2250 static unsigned int udf_count_free(struct super_block *sb) 2251 { 2252 unsigned int accum = 0; 2253 struct udf_sb_info *sbi; 2254 struct udf_part_map *map; 2255 2256 sbi = UDF_SB(sb); 2257 if (sbi->s_lvid_bh) { 2258 struct logicalVolIntegrityDesc *lvid = 2259 (struct logicalVolIntegrityDesc *) 2260 sbi->s_lvid_bh->b_data; 2261 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { 2262 accum = le32_to_cpu( 2263 lvid->freeSpaceTable[sbi->s_partition]); 2264 if (accum == 0xFFFFFFFF) 2265 accum = 0; 2266 } 2267 } 2268 2269 if (accum) 2270 return accum; 2271 2272 map = &sbi->s_partmaps[sbi->s_partition]; 2273 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { 2274 accum += udf_count_free_bitmap(sb, 2275 map->s_uspace.s_bitmap); 2276 } 2277 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { 2278 accum += udf_count_free_bitmap(sb, 2279 map->s_fspace.s_bitmap); 2280 } 2281 if (accum) 2282 return accum; 2283 2284 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { 2285 accum += udf_count_free_table(sb, 2286 map->s_uspace.s_table); 2287 } 2288 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { 2289 accum += udf_count_free_table(sb, 2290 map->s_fspace.s_table); 2291 } 2292 2293 return accum; 2294 } 2295