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 79static char error_buf[1024]; 80 81/* These are the "meat" - everything else is stuffing */ 82static int udf_fill_super(struct super_block *, void *, int); 83static void udf_put_super(struct super_block *); 84static int udf_sync_fs(struct super_block *, int); 85static int udf_remount_fs(struct super_block *, int *, char *); 86static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); 87static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, 88 struct kernel_lb_addr *); 89static void udf_load_fileset(struct super_block *, struct buffer_head *, 90 struct kernel_lb_addr *); 91static void udf_open_lvid(struct super_block *); 92static void udf_close_lvid(struct super_block *); 93static unsigned int udf_count_free(struct super_block *); 94static int udf_statfs(struct dentry *, struct kstatfs *); 95static int udf_show_options(struct seq_file *, struct vfsmount *); 96static void udf_error(struct super_block *sb, const char *function, 97 const char *fmt, ...); 98 99struct 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 */ 110static int udf_get_sb(struct file_system_type *fs_type, 111 int flags, const char *dev_name, void *data, 112 struct vfsmount *mnt) 113{ 114 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); 115} 116 117static struct file_system_type udf_fstype = { 118 .owner = THIS_MODULE, 119 .name = "udf", 120 .get_sb = udf_get_sb, 121 .kill_sb = kill_block_super, 122 .fs_flags = FS_REQUIRES_DEV, 123}; 124 125static struct kmem_cache *udf_inode_cachep; 126 127static struct inode *udf_alloc_inode(struct super_block *sb) 128{ 129 struct udf_inode_info *ei; 130 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); 131 if (!ei) 132 return NULL; 133 134 ei->i_unique = 0; 135 ei->i_lenExtents = 0; 136 ei->i_next_alloc_block = 0; 137 ei->i_next_alloc_goal = 0; 138 ei->i_strat4096 = 0; 139 140 return &ei->vfs_inode; 141} 142 143static void udf_destroy_inode(struct inode *inode) 144{ 145 kmem_cache_free(udf_inode_cachep, UDF_I(inode)); 146} 147 148static void init_once(void *foo) 149{ 150 struct udf_inode_info *ei = (struct udf_inode_info *)foo; 151 152 ei->i_ext.i_data = NULL; 153 inode_init_once(&ei->vfs_inode); 154} 155 156static int init_inodecache(void) 157{ 158 udf_inode_cachep = kmem_cache_create("udf_inode_cache", 159 sizeof(struct udf_inode_info), 160 0, (SLAB_RECLAIM_ACCOUNT | 161 SLAB_MEM_SPREAD), 162 init_once); 163 if (!udf_inode_cachep) 164 return -ENOMEM; 165 return 0; 166} 167 168static void destroy_inodecache(void) 169{ 170 kmem_cache_destroy(udf_inode_cachep); 171} 172 173/* Superblock operations */ 174static const struct super_operations udf_sb_ops = { 175 .alloc_inode = udf_alloc_inode, 176 .destroy_inode = udf_destroy_inode, 177 .write_inode = udf_write_inode, 178 .evict_inode = udf_evict_inode, 179 .put_super = udf_put_super, 180 .sync_fs = udf_sync_fs, 181 .statfs = udf_statfs, 182 .remount_fs = udf_remount_fs, 183 .show_options = udf_show_options, 184}; 185 186struct udf_options { 187 unsigned char novrs; 188 unsigned int blocksize; 189 unsigned int session; 190 unsigned int lastblock; 191 unsigned int anchor; 192 unsigned int volume; 193 unsigned short partition; 194 unsigned int fileset; 195 unsigned int rootdir; 196 unsigned int flags; 197 mode_t umask; 198 gid_t gid; 199 uid_t uid; 200 mode_t fmode; 201 mode_t dmode; 202 struct nls_table *nls_map; 203}; 204 205static int __init init_udf_fs(void) 206{ 207 int err; 208 209 err = init_inodecache(); 210 if (err) 211 goto out1; 212 err = register_filesystem(&udf_fstype); 213 if (err) 214 goto out; 215 216 return 0; 217 218out: 219 destroy_inodecache(); 220 221out1: 222 return err; 223} 224 225static void __exit exit_udf_fs(void) 226{ 227 unregister_filesystem(&udf_fstype); 228 destroy_inodecache(); 229} 230 231module_init(init_udf_fs) 232module_exit(exit_udf_fs) 233 234static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) 235{ 236 struct udf_sb_info *sbi = UDF_SB(sb); 237 238 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), 239 GFP_KERNEL); 240 if (!sbi->s_partmaps) { 241 udf_error(sb, __func__, 242 "Unable to allocate space for %d partition maps", 243 count); 244 sbi->s_partitions = 0; 245 return -ENOMEM; 246 } 247 248 sbi->s_partitions = count; 249 return 0; 250} 251 252static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt) 253{ 254 struct super_block *sb = mnt->mnt_sb; 255 struct udf_sb_info *sbi = UDF_SB(sb); 256 257 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) 258 seq_puts(seq, ",nostrict"); 259 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) 260 seq_printf(seq, ",bs=%lu", sb->s_blocksize); 261 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) 262 seq_puts(seq, ",unhide"); 263 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) 264 seq_puts(seq, ",undelete"); 265 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) 266 seq_puts(seq, ",noadinicb"); 267 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) 268 seq_puts(seq, ",shortad"); 269 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) 270 seq_puts(seq, ",uid=forget"); 271 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) 272 seq_puts(seq, ",uid=ignore"); 273 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) 274 seq_puts(seq, ",gid=forget"); 275 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) 276 seq_puts(seq, ",gid=ignore"); 277 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) 278 seq_printf(seq, ",uid=%u", sbi->s_uid); 279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) 280 seq_printf(seq, ",gid=%u", sbi->s_gid); 281 if (sbi->s_umask != 0) 282 seq_printf(seq, ",umask=%o", sbi->s_umask); 283 if (sbi->s_fmode != UDF_INVALID_MODE) 284 seq_printf(seq, ",mode=%o", sbi->s_fmode); 285 if (sbi->s_dmode != UDF_INVALID_MODE) 286 seq_printf(seq, ",dmode=%o", sbi->s_dmode); 287 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) 288 seq_printf(seq, ",session=%u", sbi->s_session); 289 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) 290 seq_printf(seq, ",lastblock=%u", sbi->s_last_block); 291 if (sbi->s_anchor != 0) 292 seq_printf(seq, ",anchor=%u", sbi->s_anchor); 293 /* 294 * volume, partition, fileset and rootdir seem to be ignored 295 * currently 296 */ 297 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) 298 seq_puts(seq, ",utf8"); 299 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) 300 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); 301 302 return 0; 303} 304 305/* 306 * udf_parse_options 307 * 308 * PURPOSE 309 * Parse mount options. 310 * 311 * DESCRIPTION 312 * The following mount options are supported: 313 * 314 * gid= Set the default group. 315 * umask= Set the default umask. 316 * mode= Set the default file permissions. 317 * dmode= Set the default directory permissions. 318 * uid= Set the default user. 319 * bs= Set the block size. 320 * unhide Show otherwise hidden files. 321 * undelete Show deleted files in lists. 322 * adinicb Embed data in the inode (default) 323 * noadinicb Don't embed data in the inode 324 * shortad Use short ad's 325 * longad Use long ad's (default) 326 * nostrict Unset strict conformance 327 * iocharset= Set the NLS character set 328 * 329 * The remaining are for debugging and disaster recovery: 330 * 331 * novrs Skip volume sequence recognition 332 * 333 * The following expect a offset from 0. 334 * 335 * session= Set the CDROM session (default= last session) 336 * anchor= Override standard anchor location. (default= 256) 337 * volume= Override the VolumeDesc location. (unused) 338 * partition= Override the PartitionDesc location. (unused) 339 * lastblock= Set the last block of the filesystem/ 340 * 341 * The following expect a offset from the partition root. 342 * 343 * fileset= Override the fileset block location. (unused) 344 * rootdir= Override the root directory location. (unused) 345 * WARNING: overriding the rootdir to a non-directory may 346 * yield highly unpredictable results. 347 * 348 * PRE-CONDITIONS 349 * options Pointer to mount options string. 350 * uopts Pointer to mount options variable. 351 * 352 * POST-CONDITIONS 353 * <return> 1 Mount options parsed okay. 354 * <return> 0 Error parsing mount options. 355 * 356 * HISTORY 357 * July 1, 1997 - Andrew E. Mileski 358 * Written, tested, and released. 359 */ 360 361enum { 362 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, 363 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, 364 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, 365 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, 366 Opt_rootdir, Opt_utf8, Opt_iocharset, 367 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, 368 Opt_fmode, Opt_dmode 369}; 370 371static const match_table_t tokens = { 372 {Opt_novrs, "novrs"}, 373 {Opt_nostrict, "nostrict"}, 374 {Opt_bs, "bs=%u"}, 375 {Opt_unhide, "unhide"}, 376 {Opt_undelete, "undelete"}, 377 {Opt_noadinicb, "noadinicb"}, 378 {Opt_adinicb, "adinicb"}, 379 {Opt_shortad, "shortad"}, 380 {Opt_longad, "longad"}, 381 {Opt_uforget, "uid=forget"}, 382 {Opt_uignore, "uid=ignore"}, 383 {Opt_gforget, "gid=forget"}, 384 {Opt_gignore, "gid=ignore"}, 385 {Opt_gid, "gid=%u"}, 386 {Opt_uid, "uid=%u"}, 387 {Opt_umask, "umask=%o"}, 388 {Opt_session, "session=%u"}, 389 {Opt_lastblock, "lastblock=%u"}, 390 {Opt_anchor, "anchor=%u"}, 391 {Opt_volume, "volume=%u"}, 392 {Opt_partition, "partition=%u"}, 393 {Opt_fileset, "fileset=%u"}, 394 {Opt_rootdir, "rootdir=%u"}, 395 {Opt_utf8, "utf8"}, 396 {Opt_iocharset, "iocharset=%s"}, 397 {Opt_fmode, "mode=%o"}, 398 {Opt_dmode, "dmode=%o"}, 399 {Opt_err, NULL} 400}; 401 402static int udf_parse_options(char *options, struct udf_options *uopt, 403 bool remount) 404{ 405 char *p; 406 int option; 407 408 uopt->novrs = 0; 409 uopt->partition = 0xFFFF; 410 uopt->session = 0xFFFFFFFF; 411 uopt->lastblock = 0; 412 uopt->anchor = 0; 413 uopt->volume = 0xFFFFFFFF; 414 uopt->rootdir = 0xFFFFFFFF; 415 uopt->fileset = 0xFFFFFFFF; 416 uopt->nls_map = NULL; 417 418 if (!options) 419 return 1; 420 421 while ((p = strsep(&options, ",")) != NULL) { 422 substring_t args[MAX_OPT_ARGS]; 423 int token; 424 if (!*p) 425 continue; 426 427 token = match_token(p, tokens, args); 428 switch (token) { 429 case Opt_novrs: 430 uopt->novrs = 1; 431 break; 432 case Opt_bs: 433 if (match_int(&args[0], &option)) 434 return 0; 435 uopt->blocksize = option; 436 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); 437 break; 438 case Opt_unhide: 439 uopt->flags |= (1 << UDF_FLAG_UNHIDE); 440 break; 441 case Opt_undelete: 442 uopt->flags |= (1 << UDF_FLAG_UNDELETE); 443 break; 444 case Opt_noadinicb: 445 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); 446 break; 447 case Opt_adinicb: 448 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); 449 break; 450 case Opt_shortad: 451 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); 452 break; 453 case Opt_longad: 454 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); 455 break; 456 case Opt_gid: 457 if (match_int(args, &option)) 458 return 0; 459 uopt->gid = option; 460 uopt->flags |= (1 << UDF_FLAG_GID_SET); 461 break; 462 case Opt_uid: 463 if (match_int(args, &option)) 464 return 0; 465 uopt->uid = option; 466 uopt->flags |= (1 << UDF_FLAG_UID_SET); 467 break; 468 case Opt_umask: 469 if (match_octal(args, &option)) 470 return 0; 471 uopt->umask = option; 472 break; 473 case Opt_nostrict: 474 uopt->flags &= ~(1 << UDF_FLAG_STRICT); 475 break; 476 case Opt_session: 477 if (match_int(args, &option)) 478 return 0; 479 uopt->session = option; 480 if (!remount) 481 uopt->flags |= (1 << UDF_FLAG_SESSION_SET); 482 break; 483 case Opt_lastblock: 484 if (match_int(args, &option)) 485 return 0; 486 uopt->lastblock = option; 487 if (!remount) 488 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); 489 break; 490 case Opt_anchor: 491 if (match_int(args, &option)) 492 return 0; 493 uopt->anchor = option; 494 break; 495 case Opt_volume: 496 if (match_int(args, &option)) 497 return 0; 498 uopt->volume = option; 499 break; 500 case Opt_partition: 501 if (match_int(args, &option)) 502 return 0; 503 uopt->partition = option; 504 break; 505 case Opt_fileset: 506 if (match_int(args, &option)) 507 return 0; 508 uopt->fileset = option; 509 break; 510 case Opt_rootdir: 511 if (match_int(args, &option)) 512 return 0; 513 uopt->rootdir = option; 514 break; 515 case Opt_utf8: 516 uopt->flags |= (1 << UDF_FLAG_UTF8); 517 break; 518#ifdef CONFIG_UDF_NLS 519 case Opt_iocharset: 520 uopt->nls_map = load_nls(args[0].from); 521 uopt->flags |= (1 << UDF_FLAG_NLS_MAP); 522 break; 523#endif 524 case Opt_uignore: 525 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); 526 break; 527 case Opt_uforget: 528 uopt->flags |= (1 << UDF_FLAG_UID_FORGET); 529 break; 530 case Opt_gignore: 531 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); 532 break; 533 case Opt_gforget: 534 uopt->flags |= (1 << UDF_FLAG_GID_FORGET); 535 break; 536 case Opt_fmode: 537 if (match_octal(args, &option)) 538 return 0; 539 uopt->fmode = option & 0777; 540 break; 541 case Opt_dmode: 542 if (match_octal(args, &option)) 543 return 0; 544 uopt->dmode = option & 0777; 545 break; 546 default: 547 printk(KERN_ERR "udf: bad mount option \"%s\" " 548 "or missing value\n", p); 549 return 0; 550 } 551 } 552 return 1; 553} 554 555static int udf_remount_fs(struct super_block *sb, int *flags, char *options) 556{ 557 struct udf_options uopt; 558 struct udf_sb_info *sbi = UDF_SB(sb); 559 int error = 0; 560 561 uopt.flags = sbi->s_flags; 562 uopt.uid = sbi->s_uid; 563 uopt.gid = sbi->s_gid; 564 uopt.umask = sbi->s_umask; 565 uopt.fmode = sbi->s_fmode; 566 uopt.dmode = sbi->s_dmode; 567 568 if (!udf_parse_options(options, &uopt, true)) 569 return -EINVAL; 570 571 lock_kernel(); 572 sbi->s_flags = uopt.flags; 573 sbi->s_uid = uopt.uid; 574 sbi->s_gid = uopt.gid; 575 sbi->s_umask = uopt.umask; 576 sbi->s_fmode = uopt.fmode; 577 sbi->s_dmode = uopt.dmode; 578 579 if (sbi->s_lvid_bh) { 580 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); 581 if (write_rev > UDF_MAX_WRITE_VERSION) 582 *flags |= MS_RDONLY; 583 } 584 585 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 586 goto out_unlock; 587 588 if (*flags & MS_RDONLY) 589 udf_close_lvid(sb); 590 else 591 udf_open_lvid(sb); 592 593out_unlock: 594 unlock_kernel(); 595 return error; 596} 597 598/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ 599/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ 600static loff_t udf_check_vsd(struct super_block *sb) 601{ 602 struct volStructDesc *vsd = NULL; 603 loff_t sector = 32768; 604 int sectorsize; 605 struct buffer_head *bh = NULL; 606 int nsr02 = 0; 607 int nsr03 = 0; 608 struct udf_sb_info *sbi; 609 610 sbi = UDF_SB(sb); 611 if (sb->s_blocksize < sizeof(struct volStructDesc)) 612 sectorsize = sizeof(struct volStructDesc); 613 else 614 sectorsize = sb->s_blocksize; 615 616 sector += (sbi->s_session << sb->s_blocksize_bits); 617 618 udf_debug("Starting at sector %u (%ld byte sectors)\n", 619 (unsigned int)(sector >> sb->s_blocksize_bits), 620 sb->s_blocksize); 621 /* Process the sequence (if applicable) */ 622 for (; !nsr02 && !nsr03; sector += sectorsize) { 623 /* Read a block */ 624 bh = udf_tread(sb, sector >> sb->s_blocksize_bits); 625 if (!bh) 626 break; 627 628 /* Look for ISO descriptors */ 629 vsd = (struct volStructDesc *)(bh->b_data + 630 (sector & (sb->s_blocksize - 1))); 631 632 if (vsd->stdIdent[0] == 0) { 633 brelse(bh); 634 break; 635 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, 636 VSD_STD_ID_LEN)) { 637 switch (vsd->structType) { 638 case 0: 639 udf_debug("ISO9660 Boot Record found\n"); 640 break; 641 case 1: 642 udf_debug("ISO9660 Primary Volume Descriptor " 643 "found\n"); 644 break; 645 case 2: 646 udf_debug("ISO9660 Supplementary Volume " 647 "Descriptor found\n"); 648 break; 649 case 3: 650 udf_debug("ISO9660 Volume Partition Descriptor " 651 "found\n"); 652 break; 653 case 255: 654 udf_debug("ISO9660 Volume Descriptor Set " 655 "Terminator found\n"); 656 break; 657 default: 658 udf_debug("ISO9660 VRS (%u) found\n", 659 vsd->structType); 660 break; 661 } 662 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, 663 VSD_STD_ID_LEN)) 664 ; /* nothing */ 665 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, 666 VSD_STD_ID_LEN)) { 667 brelse(bh); 668 break; 669 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, 670 VSD_STD_ID_LEN)) 671 nsr02 = sector; 672 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, 673 VSD_STD_ID_LEN)) 674 nsr03 = sector; 675 brelse(bh); 676 } 677 678 if (nsr03) 679 return nsr03; 680 else if (nsr02) 681 return nsr02; 682 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) 683 return -1; 684 else 685 return 0; 686} 687 688static int udf_find_fileset(struct super_block *sb, 689 struct kernel_lb_addr *fileset, 690 struct kernel_lb_addr *root) 691{ 692 struct buffer_head *bh = NULL; 693 long lastblock; 694 uint16_t ident; 695 struct udf_sb_info *sbi; 696 697 if (fileset->logicalBlockNum != 0xFFFFFFFF || 698 fileset->partitionReferenceNum != 0xFFFF) { 699 bh = udf_read_ptagged(sb, fileset, 0, &ident); 700 701 if (!bh) { 702 return 1; 703 } else if (ident != TAG_IDENT_FSD) { 704 brelse(bh); 705 return 1; 706 } 707 708 } 709 710 sbi = UDF_SB(sb); 711 if (!bh) { 712 /* Search backwards through the partitions */ 713 struct kernel_lb_addr newfileset; 714 715 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 777static 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; 826out2: 827 kfree(outstr); 828out1: 829 kfree(instr); 830 return ret; 831} 832 833static 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 924error_exit: 925 return 1; 926} 927 928static 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 943int 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 951static 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 979static 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 1080static 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 1102static 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 1153static 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 } 1235out_bh: 1236 /* In case loading failed, we handle cleanup in udf_fill_super */ 1237 brelse(bh); 1238 return ret; 1239} 1240 1241static 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 1401out_bh: 1402 brelse(bh); 1403 return ret; 1404} 1405 1406/* 1407 * udf_load_logicalvolint 1408 * 1409 */ 1410static 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 */ 1452static 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 1575static 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 */ 1606static 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 */ 1631static 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 */ 1694static 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 } 1720out: 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 */ 1729static 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 1768static 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 1795static 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 1827static 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 1844static 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 1873static 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 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); 1883 uopt.uid = -1; 1884 uopt.gid = -1; 1885 uopt.umask = 0; 1886 uopt.fmode = UDF_INVALID_MODE; 1887 uopt.dmode = UDF_INVALID_MODE; 1888 1889 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); 1890 if (!sbi) 1891 return -ENOMEM; 1892 1893 sb->s_fs_info = sbi; 1894 1895 mutex_init(&sbi->s_alloc_mutex); 1896 1897 if (!udf_parse_options((char *)options, &uopt, false)) 1898 goto error_out; 1899 1900 if (uopt.flags & (1 << UDF_FLAG_UTF8) && 1901 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { 1902 udf_error(sb, "udf_read_super", 1903 "utf8 cannot be combined with iocharset\n"); 1904 goto error_out; 1905 } 1906#ifdef CONFIG_UDF_NLS 1907 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { 1908 uopt.nls_map = load_nls_default(); 1909 if (!uopt.nls_map) 1910 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); 1911 else 1912 udf_debug("Using default NLS map\n"); 1913 } 1914#endif 1915 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) 1916 uopt.flags |= (1 << UDF_FLAG_UTF8); 1917 1918 fileset.logicalBlockNum = 0xFFFFFFFF; 1919 fileset.partitionReferenceNum = 0xFFFF; 1920 1921 sbi->s_flags = uopt.flags; 1922 sbi->s_uid = uopt.uid; 1923 sbi->s_gid = uopt.gid; 1924 sbi->s_umask = uopt.umask; 1925 sbi->s_fmode = uopt.fmode; 1926 sbi->s_dmode = uopt.dmode; 1927 sbi->s_nls_map = uopt.nls_map; 1928 1929 if (uopt.session == 0xFFFFFFFF) 1930 sbi->s_session = udf_get_last_session(sb); 1931 else 1932 sbi->s_session = uopt.session; 1933 1934 udf_debug("Multi-session=%d\n", sbi->s_session); 1935 1936 /* Fill in the rest of the superblock */ 1937 sb->s_op = &udf_sb_ops; 1938 sb->s_export_op = &udf_export_ops; 1939 1940 sb->s_dirt = 0; 1941 sb->s_magic = UDF_SUPER_MAGIC; 1942 sb->s_time_gran = 1000; 1943 1944 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { 1945 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1946 } else { 1947 uopt.blocksize = bdev_logical_block_size(sb->s_bdev); 1948 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1949 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { 1950 if (!silent) 1951 printk(KERN_NOTICE 1952 "UDF-fs: Rescanning with blocksize " 1953 "%d\n", UDF_DEFAULT_BLOCKSIZE); 1954 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; 1955 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1956 } 1957 } 1958 if (!ret) { 1959 printk(KERN_WARNING "UDF-fs: No partition found (1)\n"); 1960 goto error_out; 1961 } 1962 1963 udf_debug("Lastblock=%d\n", sbi->s_last_block); 1964 1965 if (sbi->s_lvid_bh) { 1966 struct logicalVolIntegrityDescImpUse *lvidiu = 1967 udf_sb_lvidiu(sbi); 1968 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); 1969 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); 1970 /* uint16_t maxUDFWriteRev = 1971 le16_to_cpu(lvidiu->maxUDFWriteRev); */ 1972 1973 if (minUDFReadRev > UDF_MAX_READ_VERSION) { 1974 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x " 1975 "(max is %x)\n", 1976 le16_to_cpu(lvidiu->minUDFReadRev), 1977 UDF_MAX_READ_VERSION); 1978 goto error_out; 1979 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) 1980 sb->s_flags |= MS_RDONLY; 1981 1982 sbi->s_udfrev = minUDFWriteRev; 1983 1984 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) 1985 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); 1986 if (minUDFReadRev >= UDF_VERS_USE_STREAMS) 1987 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); 1988 } 1989 1990 if (!sbi->s_partitions) { 1991 printk(KERN_WARNING "UDF-fs: No partition found (2)\n"); 1992 goto error_out; 1993 } 1994 1995 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & 1996 UDF_PART_FLAG_READ_ONLY) { 1997 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; " 1998 "forcing readonly mount\n"); 1999 sb->s_flags |= MS_RDONLY; 2000 } 2001 2002 if (udf_find_fileset(sb, &fileset, &rootdir)) { 2003 printk(KERN_WARNING "UDF-fs: No fileset found\n"); 2004 goto error_out; 2005 } 2006 2007 if (!silent) { 2008 struct timestamp ts; 2009 udf_time_to_disk_stamp(&ts, sbi->s_record_time); 2010 udf_info("UDF: Mounting volume '%s', " 2011 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n", 2012 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day, 2013 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); 2014 } 2015 if (!(sb->s_flags & MS_RDONLY)) 2016 udf_open_lvid(sb); 2017 2018 /* Assign the root inode */ 2019 /* assign inodes by physical block number */ 2020 /* perhaps it's not extensible enough, but for now ... */ 2021 inode = udf_iget(sb, &rootdir); 2022 if (!inode) { 2023 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, " 2024 "partition=%d\n", 2025 rootdir.logicalBlockNum, rootdir.partitionReferenceNum); 2026 goto error_out; 2027 } 2028 2029 /* Allocate a dentry for the root inode */ 2030 sb->s_root = d_alloc_root(inode); 2031 if (!sb->s_root) { 2032 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n"); 2033 iput(inode); 2034 goto error_out; 2035 } 2036 sb->s_maxbytes = MAX_LFS_FILESIZE; 2037 return 0; 2038 2039error_out: 2040 if (sbi->s_vat_inode) 2041 iput(sbi->s_vat_inode); 2042 if (sbi->s_partitions) 2043 for (i = 0; i < sbi->s_partitions; i++) 2044 udf_free_partition(&sbi->s_partmaps[i]); 2045#ifdef CONFIG_UDF_NLS 2046 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 2047 unload_nls(sbi->s_nls_map); 2048#endif 2049 if (!(sb->s_flags & MS_RDONLY)) 2050 udf_close_lvid(sb); 2051 brelse(sbi->s_lvid_bh); 2052 2053 kfree(sbi->s_partmaps); 2054 kfree(sbi); 2055 sb->s_fs_info = NULL; 2056 2057 return -EINVAL; 2058} 2059 2060static void udf_error(struct super_block *sb, const char *function, 2061 const char *fmt, ...) 2062{ 2063 va_list args; 2064 2065 if (!(sb->s_flags & MS_RDONLY)) { 2066 /* mark sb error */ 2067 sb->s_dirt = 1; 2068 } 2069 va_start(args, fmt); 2070 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2071 va_end(args); 2072 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n", 2073 sb->s_id, function, error_buf); 2074} 2075 2076void udf_warning(struct super_block *sb, const char *function, 2077 const char *fmt, ...) 2078{ 2079 va_list args; 2080 2081 va_start(args, fmt); 2082 vsnprintf(error_buf, sizeof(error_buf), fmt, args); 2083 va_end(args); 2084 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", 2085 sb->s_id, function, error_buf); 2086} 2087 2088static void udf_put_super(struct super_block *sb) 2089{ 2090 int i; 2091 struct udf_sb_info *sbi; 2092 2093 sbi = UDF_SB(sb); 2094 2095 lock_kernel(); 2096 2097 if (sbi->s_vat_inode) 2098 iput(sbi->s_vat_inode); 2099 if (sbi->s_partitions) 2100 for (i = 0; i < sbi->s_partitions; i++) 2101 udf_free_partition(&sbi->s_partmaps[i]); 2102#ifdef CONFIG_UDF_NLS 2103 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 2104 unload_nls(sbi->s_nls_map); 2105#endif 2106 if (!(sb->s_flags & MS_RDONLY)) 2107 udf_close_lvid(sb); 2108 brelse(sbi->s_lvid_bh); 2109 kfree(sbi->s_partmaps); 2110 kfree(sb->s_fs_info); 2111 sb->s_fs_info = NULL; 2112 2113 unlock_kernel(); 2114} 2115 2116static int udf_sync_fs(struct super_block *sb, int wait) 2117{ 2118 struct udf_sb_info *sbi = UDF_SB(sb); 2119 2120 mutex_lock(&sbi->s_alloc_mutex); 2121 if (sbi->s_lvid_dirty) { 2122 /* 2123 * Blockdevice will be synced later so we don't have to submit 2124 * the buffer for IO 2125 */ 2126 mark_buffer_dirty(sbi->s_lvid_bh); 2127 sb->s_dirt = 0; 2128 sbi->s_lvid_dirty = 0; 2129 } 2130 mutex_unlock(&sbi->s_alloc_mutex); 2131 2132 return 0; 2133} 2134 2135static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) 2136{ 2137 struct super_block *sb = dentry->d_sb; 2138 struct udf_sb_info *sbi = UDF_SB(sb); 2139 struct logicalVolIntegrityDescImpUse *lvidiu; 2140 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 2141 2142 if (sbi->s_lvid_bh != NULL) 2143 lvidiu = udf_sb_lvidiu(sbi); 2144 else 2145 lvidiu = NULL; 2146 2147 buf->f_type = UDF_SUPER_MAGIC; 2148 buf->f_bsize = sb->s_blocksize; 2149 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; 2150 buf->f_bfree = udf_count_free(sb); 2151 buf->f_bavail = buf->f_bfree; 2152 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + 2153 le32_to_cpu(lvidiu->numDirs)) : 0) 2154 + buf->f_bfree; 2155 buf->f_ffree = buf->f_bfree; 2156 buf->f_namelen = UDF_NAME_LEN - 2; 2157 buf->f_fsid.val[0] = (u32)id; 2158 buf->f_fsid.val[1] = (u32)(id >> 32); 2159 2160 return 0; 2161} 2162 2163static unsigned int udf_count_free_bitmap(struct super_block *sb, 2164 struct udf_bitmap *bitmap) 2165{ 2166 struct buffer_head *bh = NULL; 2167 unsigned int accum = 0; 2168 int index; 2169 int block = 0, newblock; 2170 struct kernel_lb_addr loc; 2171 uint32_t bytes; 2172 uint8_t *ptr; 2173 uint16_t ident; 2174 struct spaceBitmapDesc *bm; 2175 2176 lock_kernel(); 2177 2178 loc.logicalBlockNum = bitmap->s_extPosition; 2179 loc.partitionReferenceNum = UDF_SB(sb)->s_partition; 2180 bh = udf_read_ptagged(sb, &loc, 0, &ident); 2181 2182 if (!bh) { 2183 printk(KERN_ERR "udf: udf_count_free failed\n"); 2184 goto out; 2185 } else if (ident != TAG_IDENT_SBD) { 2186 brelse(bh); 2187 printk(KERN_ERR "udf: udf_count_free failed\n"); 2188 goto out; 2189 } 2190 2191 bm = (struct spaceBitmapDesc *)bh->b_data; 2192 bytes = le32_to_cpu(bm->numOfBytes); 2193 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ 2194 ptr = (uint8_t *)bh->b_data; 2195 2196 while (bytes > 0) { 2197 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); 2198 accum += bitmap_weight((const unsigned long *)(ptr + index), 2199 cur_bytes * 8); 2200 bytes -= cur_bytes; 2201 if (bytes) { 2202 brelse(bh); 2203 newblock = udf_get_lb_pblock(sb, &loc, ++block); 2204 bh = udf_tread(sb, newblock); 2205 if (!bh) { 2206 udf_debug("read failed\n"); 2207 goto out; 2208 } 2209 index = 0; 2210 ptr = (uint8_t *)bh->b_data; 2211 } 2212 } 2213 brelse(bh); 2214 2215out: 2216 unlock_kernel(); 2217 2218 return accum; 2219} 2220 2221static unsigned int udf_count_free_table(struct super_block *sb, 2222 struct inode *table) 2223{ 2224 unsigned int accum = 0; 2225 uint32_t elen; 2226 struct kernel_lb_addr eloc; 2227 int8_t etype; 2228 struct extent_position epos; 2229 2230 lock_kernel(); 2231 2232 epos.block = UDF_I(table)->i_location; 2233 epos.offset = sizeof(struct unallocSpaceEntry); 2234 epos.bh = NULL; 2235 2236 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) 2237 accum += (elen >> table->i_sb->s_blocksize_bits); 2238 2239 brelse(epos.bh); 2240 2241 unlock_kernel(); 2242 2243 return accum; 2244} 2245 2246static unsigned int udf_count_free(struct super_block *sb) 2247{ 2248 unsigned int accum = 0; 2249 struct udf_sb_info *sbi; 2250 struct udf_part_map *map; 2251 2252 sbi = UDF_SB(sb); 2253 if (sbi->s_lvid_bh) { 2254 struct logicalVolIntegrityDesc *lvid = 2255 (struct logicalVolIntegrityDesc *) 2256 sbi->s_lvid_bh->b_data; 2257 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { 2258 accum = le32_to_cpu( 2259 lvid->freeSpaceTable[sbi->s_partition]); 2260 if (accum == 0xFFFFFFFF) 2261 accum = 0; 2262 } 2263 } 2264 2265 if (accum) 2266 return accum; 2267 2268 map = &sbi->s_partmaps[sbi->s_partition]; 2269 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { 2270 accum += udf_count_free_bitmap(sb, 2271 map->s_uspace.s_bitmap); 2272 } 2273 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { 2274 accum += udf_count_free_bitmap(sb, 2275 map->s_fspace.s_bitmap); 2276 } 2277 if (accum) 2278 return accum; 2279 2280 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { 2281 accum += udf_count_free_table(sb, 2282 map->s_uspace.s_table); 2283 } 2284 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { 2285 accum += udf_count_free_table(sb, 2286 map->s_fspace.s_table); 2287 } 2288 2289 return accum; 2290} 2291