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