fs/udf/super.c

   1 /*
   2  * super.c
   3  *
   4  * PURPOSE
   5  *  Super block routines for the OSTA-UDF(tm) filesystem.
   6  *
   7  * DESCRIPTION
   8  *  OSTA-UDF(tm) = Optical Storage Technology Association
   9  *  Universal Disk Format.
  10  *
  11  *  This code is based on version 2.00 of the UDF specification,
  12  *  and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
  13  *    http://www.osta.org/
  14  *    http://www.ecma.ch/
  15  *    http://www.iso.org/
  16  *
  17  * COPYRIGHT
  18  *  This file is distributed under the terms of the GNU General Public
  19  *  License (GPL). Copies of the GPL can be obtained from:
  20  *    ftp://prep.ai.mit.edu/pub/gnu/GPL
  21  *  Each contributing author retains all rights to their own work.
  22  *
  23  *  (C) 1998 Dave Boynton
  24  *  (C) 1998-2004 Ben Fennema
  25  *  (C) 2000 Stelias Computing Inc
  26  *
  27  * HISTORY
  28  *
  29  *  09/24/98 dgb  changed to allow compiling outside of kernel, and
  30  *                added some debugging.
  31  *  10/01/98 dgb  updated to allow (some) possibility of compiling w/2.0.34
  32  *  10/16/98      attempting some multi-session support
  33  *  10/17/98      added freespace count for "df"
  34  *  11/11/98 gr   added novrs option
  35  *  11/26/98 dgb  added fileset,anchor mount options
  36  *  12/06/98 blf  really hosed things royally. vat/sparing support. sequenced
  37  *                vol descs. rewrote option handling based on isofs
  38  *  12/20/98      find the free space bitmap (if it exists)
  39  */
  40
  41 #include "udfdecl.h"
  42
  43 #include <linux/blkdev.h>
  44 #include <linux/slab.h>
  45 #include <linux/kernel.h>
  46 #include <linux/module.h>
  47 #include <linux/parser.h>
  48 #include <linux/stat.h>
  49 #include <linux/cdrom.h>
  50 #include <linux/nls.h>
  51 #include <linux/buffer_head.h>
  52 #include <linux/vfs.h>
  53 #include <linux/vmalloc.h>
  54 #include <linux/errno.h>
  55 #include <linux/mount.h>
  56 #include <linux/seq_file.h>
  57 #include <linux/bitmap.h>
  58 #include <linux/crc-itu-t.h>
  59 #include <linux/log2.h>
  60 #include <asm/byteorder.h>
  61
  62 #include "udf_sb.h"
  63 #include "udf_i.h"
  64
  65 #include <linux/init.h>
  66 #include <asm/uaccess.h>
  67
  68 #define VDS_POS_PRIMARY_VOL_DESC        0
  69 #define VDS_POS_UNALLOC_SPACE_DESC      1
  70 #define VDS_POS_LOGICAL_VOL_DESC        2
  71 #define VDS_POS_PARTITION_DESC          3
  72 #define VDS_POS_IMP_USE_VOL_DESC        4
  73 #define VDS_POS_VOL_DESC_PTR            5
  74 #define VDS_POS_TERMINATING_DESC        6
  75 #define VDS_POS_LENGTH                  7
  76
  77 #define UDF_DEFAULT_BLOCKSIZE 2048
  78
  79 enum { UDF_MAX_LINKS = 0xffff };
  80
  81 /* These are the "meat" - everything else is stuffing */
  82 static int udf_fill_super(struct super_block *, void *, int);
  83 static void udf_put_super(struct super_block *);
  84 static int udf_sync_fs(struct super_block *, int);
  85 static int udf_remount_fs(struct super_block *, int *, char *);
  86 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
  87 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
  88                             struct kernel_lb_addr *);
  89 static void udf_load_fileset(struct super_block *, struct buffer_head *,
  90                              struct kernel_lb_addr *);
  91 static void udf_open_lvid(struct super_block *);
  92 static void udf_close_lvid(struct super_block *);
  93 static unsigned int udf_count_free(struct super_block *);
  94 static int udf_statfs(struct dentry *, struct kstatfs *);
  95 static int udf_show_options(struct seq_file *, struct dentry *);
  96
  97 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
  98 {
  99         struct logicalVolIntegrityDesc *lvid =
 100                 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
 101         __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
 102         __u32 offset = number_of_partitions * 2 *
 103                                 sizeof(uint32_t)/sizeof(uint8_t);
 104         return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
 105 }
 106
 107 /* UDF filesystem type */
 108 static struct dentry *udf_mount(struct file_system_type *fs_type,
 109                       int flags, const char *dev_name, void *data)
 110 {
 111         return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
 112 }
 113
 114 static struct file_system_type udf_fstype = {
 115         .owner          = THIS_MODULE,
 116         .name           = "udf",
 117         .mount          = udf_mount,
 118         .kill_sb        = kill_block_super,
 119         .fs_flags       = FS_REQUIRES_DEV,
 120 };
 121
 122 static struct kmem_cache *udf_inode_cachep;
 123
 124 static struct inode *udf_alloc_inode(struct super_block *sb)
 125 {
 126         struct udf_inode_info *ei;
 127         ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
 128         if (!ei)
 129                 return NULL;
 130
 131         ei->i_unique = 0;
 132         ei->i_lenExtents = 0;
 133         ei->i_next_alloc_block = 0;
 134         ei->i_next_alloc_goal = 0;
 135         ei->i_strat4096 = 0;
 136         init_rwsem(&ei->i_data_sem);
 137
 138         return &ei->vfs_inode;
 139 }
 140
 141 static void udf_i_callback(struct rcu_head *head)
 142 {
 143         struct inode *inode = container_of(head, struct inode, i_rcu);
 144         kmem_cache_free(udf_inode_cachep, UDF_I(inode));
 145 }
 146
 147 static void udf_destroy_inode(struct inode *inode)
 148 {
 149         call_rcu(&inode->i_rcu, udf_i_callback);
 150 }
 151
 152 static void init_once(void *foo)
 153 {
 154         struct udf_inode_info *ei = (struct udf_inode_info *)foo;
 155
 156         ei->i_ext.i_data = NULL;
 157         inode_init_once(&ei->vfs_inode);
 158 }
 159
 160 static int init_inodecache(void)
 161 {
 162         udf_inode_cachep = kmem_cache_create("udf_inode_cache",
 163                                              sizeof(struct udf_inode_info),
 164                                              0, (SLAB_RECLAIM_ACCOUNT |
 165                                                  SLAB_MEM_SPREAD),
 166                                              init_once);
 167         if (!udf_inode_cachep)
 168                 return -ENOMEM;
 169         return 0;
 170 }
 171
 172 static void destroy_inodecache(void)
 173 {
 174         /*
 175          * Make sure all delayed rcu free inodes are flushed before we
 176          * destroy cache.
 177          */
 178         rcu_barrier();
 179         kmem_cache_destroy(udf_inode_cachep);
 180 }
 181
 182 /* Superblock operations */
 183 static const struct super_operations udf_sb_ops = {
 184         .alloc_inode    = udf_alloc_inode,
 185         .destroy_inode  = udf_destroy_inode,
 186         .write_inode    = udf_write_inode,
 187         .evict_inode    = udf_evict_inode,
 188         .put_super      = udf_put_super,
 189         .sync_fs        = udf_sync_fs,
 190         .statfs         = udf_statfs,
 191         .remount_fs     = udf_remount_fs,
 192         .show_options   = udf_show_options,
 193 };
 194
 195 struct udf_options {
 196         unsigned char novrs;
 197         unsigned int blocksize;
 198         unsigned int session;
 199         unsigned int lastblock;
 200         unsigned int anchor;
 201         unsigned int volume;
 202         unsigned short partition;
 203         unsigned int fileset;
 204         unsigned int rootdir;
 205         unsigned int flags;
 206         umode_t umask;
 207         kgid_t gid;
 208         kuid_t uid;
 209         umode_t fmode;
 210         umode_t dmode;
 211         struct nls_table *nls_map;
 212 };
 213
 214 static int __init init_udf_fs(void)
 215 {
 216         int err;
 217
 218         err = init_inodecache();
 219         if (err)
 220                 goto out1;
 221         err = register_filesystem(&udf_fstype);
 222         if (err)
 223                 goto out;
 224
 225         return 0;
 226
 227 out:
 228         destroy_inodecache();
 229
 230 out1:
 231         return err;
 232 }
 233
 234 static void __exit exit_udf_fs(void)
 235 {
 236         unregister_filesystem(&udf_fstype);
 237         destroy_inodecache();
 238 }
 239
 240 module_init(init_udf_fs)
 241 module_exit(exit_udf_fs)
 242
 243 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
 244 {
 245         struct udf_sb_info *sbi = UDF_SB(sb);
 246
 247         sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
 248                                   GFP_KERNEL);
 249         if (!sbi->s_partmaps) {
 250                 udf_err(sb, "Unable to allocate space for %d partition maps\n",
 251                         count);
 252                 sbi->s_partitions = 0;
 253                 return -ENOMEM;
 254         }
 255
 256         sbi->s_partitions = count;
 257         return 0;
 258 }
 259
 260 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
 261 {
 262         int i;
 263         int nr_groups = bitmap->s_nr_groups;
 264         int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
 265                                                 nr_groups);
 266
 267         for (i = 0; i < nr_groups; i++)
 268                 if (bitmap->s_block_bitmap[i])
 269                         brelse(bitmap->s_block_bitmap[i]);
 270
 271         if (size <= PAGE_SIZE)
 272                 kfree(bitmap);
 273         else
 274                 vfree(bitmap);
 275 }
 276
 277 static void udf_free_partition(struct udf_part_map *map)
 278 {
 279         int i;
 280         struct udf_meta_data *mdata;
 281
 282         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
 283                 iput(map->s_uspace.s_table);
 284         if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
 285                 iput(map->s_fspace.s_table);
 286         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
 287                 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
 288         if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
 289                 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
 290         if (map->s_partition_type == UDF_SPARABLE_MAP15)
 291                 for (i = 0; i < 4; i++)
 292                         brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
 293         else if (map->s_partition_type == UDF_METADATA_MAP25) {
 294                 mdata = &map->s_type_specific.s_metadata;
 295                 iput(mdata->s_metadata_fe);
 296                 mdata->s_metadata_fe = NULL;
 297
 298                 iput(mdata->s_mirror_fe);
 299                 mdata->s_mirror_fe = NULL;
 300
 301                 iput(mdata->s_bitmap_fe);
 302                 mdata->s_bitmap_fe = NULL;
 303         }
 304 }
 305
 306 static void udf_sb_free_partitions(struct super_block *sb)
 307 {
 308         struct udf_sb_info *sbi = UDF_SB(sb);
 309         int i;
 310
 311         for (i = 0; i < sbi->s_partitions; i++)
 312                 udf_free_partition(&sbi->s_partmaps[i]);
 313         kfree(sbi->s_partmaps);
 314         sbi->s_partmaps = NULL;
 315 }
 316
 317 static int udf_show_options(struct seq_file *seq, struct dentry *root)
 318 {
 319         struct super_block *sb = root->d_sb;
 320         struct udf_sb_info *sbi = UDF_SB(sb);
 321
 322         if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
 323                 seq_puts(seq, ",nostrict");
 324         if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
 325                 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
 326         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
 327                 seq_puts(seq, ",unhide");
 328         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
 329                 seq_puts(seq, ",undelete");
 330         if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
 331                 seq_puts(seq, ",noadinicb");
 332         if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
 333                 seq_puts(seq, ",shortad");
 334         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
 335                 seq_puts(seq, ",uid=forget");
 336         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
 337                 seq_puts(seq, ",uid=ignore");
 338         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
 339                 seq_puts(seq, ",gid=forget");
 340         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
 341                 seq_puts(seq, ",gid=ignore");
 342         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
 343                 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
 344         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
 345                 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
 346         if (sbi->s_umask != 0)
 347                 seq_printf(seq, ",umask=%ho", sbi->s_umask);
 348         if (sbi->s_fmode != UDF_INVALID_MODE)
 349                 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
 350         if (sbi->s_dmode != UDF_INVALID_MODE)
 351                 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
 352         if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
 353                 seq_printf(seq, ",session=%u", sbi->s_session);
 354         if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
 355                 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
 356         if (sbi->s_anchor != 0)
 357                 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
 358         /*
 359          * volume, partition, fileset and rootdir seem to be ignored
 360          * currently
 361          */
 362         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
 363                 seq_puts(seq, ",utf8");
 364         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
 365                 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
 366
 367         return 0;
 368 }
 369
 370 /*
 371  * udf_parse_options
 372  *
 373  * PURPOSE
 374  *      Parse mount options.
 375  *
 376  * DESCRIPTION
 377  *      The following mount options are supported:
 378  *
 379  *      gid=            Set the default group.
 380  *      umask=          Set the default umask.
 381  *      mode=           Set the default file permissions.
 382  *      dmode=          Set the default directory permissions.
 383  *      uid=            Set the default user.
 384  *      bs=             Set the block size.
 385  *      unhide          Show otherwise hidden files.
 386  *      undelete        Show deleted files in lists.
 387  *      adinicb         Embed data in the inode (default)
 388  *      noadinicb       Don't embed data in the inode
 389  *      shortad         Use short ad's
 390  *      longad          Use long ad's (default)
 391  *      nostrict        Unset strict conformance
 392  *      iocharset=      Set the NLS character set
 393  *
 394  *      The remaining are for debugging and disaster recovery:
 395  *
 396  *      novrs           Skip volume sequence recognition
 397  *
 398  *      The following expect a offset from 0.
 399  *
 400  *      session=        Set the CDROM session (default= last session)
 401  *      anchor=         Override standard anchor location. (default= 256)
 402  *      volume=         Override the VolumeDesc location. (unused)
 403  *      partition=      Override the PartitionDesc location. (unused)
 404  *      lastblock=      Set the last block of the filesystem/
 405  *
 406  *      The following expect a offset from the partition root.
 407  *
 408  *      fileset=        Override the fileset block location. (unused)
 409  *      rootdir=        Override the root directory location. (unused)
 410  *              WARNING: overriding the rootdir to a non-directory may
 411  *              yield highly unpredictable results.
 412  *
 413  * PRE-CONDITIONS
 414  *      options         Pointer to mount options string.
 415  *      uopts           Pointer to mount options variable.
 416  *
 417  * POST-CONDITIONS
 418  *      <return>        1       Mount options parsed okay.
 419  *      <return>        0       Error parsing mount options.
 420  *
 421  * HISTORY
 422  *      July 1, 1997 - Andrew E. Mileski
 423  *      Written, tested, and released.
 424  */
 425
 426 enum {
 427         Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
 428         Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
 429         Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
 430         Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
 431         Opt_rootdir, Opt_utf8, Opt_iocharset,
 432         Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
 433         Opt_fmode, Opt_dmode
 434 };
 435
 436 static const match_table_t tokens = {
 437         {Opt_novrs,     "novrs"},
 438         {Opt_nostrict,  "nostrict"},
 439         {Opt_bs,        "bs=%u"},
 440         {Opt_unhide,    "unhide"},
 441         {Opt_undelete,  "undelete"},
 442         {Opt_noadinicb, "noadinicb"},
 443         {Opt_adinicb,   "adinicb"},
 444         {Opt_shortad,   "shortad"},
 445         {Opt_longad,    "longad"},
 446         {Opt_uforget,   "uid=forget"},
 447         {Opt_uignore,   "uid=ignore"},
 448         {Opt_gforget,   "gid=forget"},
 449         {Opt_gignore,   "gid=ignore"},
 450         {Opt_gid,       "gid=%u"},
 451         {Opt_uid,       "uid=%u"},
 452         {Opt_umask,     "umask=%o"},
 453         {Opt_session,   "session=%u"},
 454         {Opt_lastblock, "lastblock=%u"},
 455         {Opt_anchor,    "anchor=%u"},
 456         {Opt_volume,    "volume=%u"},
 457         {Opt_partition, "partition=%u"},
 458         {Opt_fileset,   "fileset=%u"},
 459         {Opt_rootdir,   "rootdir=%u"},
 460         {Opt_utf8,      "utf8"},
 461         {Opt_iocharset, "iocharset=%s"},
 462         {Opt_fmode,     "mode=%o"},
 463         {Opt_dmode,     "dmode=%o"},
 464         {Opt_err,       NULL}
 465 };
 466
 467 static int udf_parse_options(char *options, struct udf_options *uopt,
 468                              bool remount)
 469 {
 470         char *p;
 471         int option;
 472
 473         uopt->novrs = 0;
 474         uopt->partition = 0xFFFF;
 475         uopt->session = 0xFFFFFFFF;
 476         uopt->lastblock = 0;
 477         uopt->anchor = 0;
 478         uopt->volume = 0xFFFFFFFF;
 479         uopt->rootdir = 0xFFFFFFFF;
 480         uopt->fileset = 0xFFFFFFFF;
 481         uopt->nls_map = NULL;
 482
 483         if (!options)
 484                 return 1;
 485
 486         while ((p = strsep(&options, ",")) != NULL) {
 487                 substring_t args[MAX_OPT_ARGS];
 488                 int token;
 489                 if (!*p)
 490                         continue;
 491
 492                 token = match_token(p, tokens, args);
 493                 switch (token) {
 494                 case Opt_novrs:
 495                         uopt->novrs = 1;
 496                         break;
 497                 case Opt_bs:
 498                         if (match_int(&args[0], &option))
 499                                 return 0;
 500                         uopt->blocksize = option;
 501                         uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
 502                         break;
 503                 case Opt_unhide:
 504                         uopt->flags |= (1 << UDF_FLAG_UNHIDE);
 505                         break;
 506                 case Opt_undelete:
 507                         uopt->flags |= (1 << UDF_FLAG_UNDELETE);
 508                         break;
 509                 case Opt_noadinicb:
 510                         uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
 511                         break;
 512                 case Opt_adinicb:
 513                         uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
 514                         break;
 515                 case Opt_shortad:
 516                         uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
 517                         break;
 518                 case Opt_longad:
 519                         uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
 520                         break;
 521                 case Opt_gid:
 522                         if (match_int(args, &option))
 523                                 return 0;
 524                         uopt->gid = make_kgid(current_user_ns(), option);
 525                         if (!gid_valid(uopt->gid))
 526                                 return 0;
 527                         uopt->flags |= (1 << UDF_FLAG_GID_SET);
 528                         break;
 529                 case Opt_uid:
 530                         if (match_int(args, &option))
 531                                 return 0;
 532                         uopt->uid = make_kuid(current_user_ns(), option);
 533                         if (!uid_valid(uopt->uid))
 534                                 return 0;
 535                         uopt->flags |= (1 << UDF_FLAG_UID_SET);
 536                         break;
 537                 case Opt_umask:
 538                         if (match_octal(args, &option))
 539                                 return 0;
 540                         uopt->umask = option;
 541                         break;
 542                 case Opt_nostrict:
 543                         uopt->flags &= ~(1 << UDF_FLAG_STRICT);
 544                         break;
 545                 case Opt_session:
 546                         if (match_int(args, &option))
 547                                 return 0;
 548                         uopt->session = option;
 549                         if (!remount)
 550                                 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
 551                         break;
 552                 case Opt_lastblock:
 553                         if (match_int(args, &option))
 554                                 return 0;
 555                         uopt->lastblock = option;
 556                         if (!remount)
 557                                 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
 558                         break;
 559                 case Opt_anchor:
 560                         if (match_int(args, &option))
 561                                 return 0;
 562                         uopt->anchor = option;
 563                         break;
 564                 case Opt_volume:
 565                         if (match_int(args, &option))
 566                                 return 0;
 567                         uopt->volume = option;
 568                         break;
 569                 case Opt_partition:
 570                         if (match_int(args, &option))
 571                                 return 0;
 572                         uopt->partition = option;
 573                         break;
 574                 case Opt_fileset:
 575                         if (match_int(args, &option))
 576                                 return 0;
 577                         uopt->fileset = option;
 578                         break;
 579                 case Opt_rootdir:
 580                         if (match_int(args, &option))
 581                                 return 0;
 582                         uopt->rootdir = option;
 583                         break;
 584                 case Opt_utf8:
 585                         uopt->flags |= (1 << UDF_FLAG_UTF8);
 586                         break;
 587 #ifdef CONFIG_UDF_NLS
 588                 case Opt_iocharset:
 589                         uopt->nls_map = load_nls(args[0].from);
 590                         uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
 591                         break;
 592 #endif
 593                 case Opt_uignore:
 594                         uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
 595                         break;
 596                 case Opt_uforget:
 597                         uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
 598                         break;
 599                 case Opt_gignore:
 600                         uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
 601                         break;
 602                 case Opt_gforget:
 603                         uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
 604                         break;
 605                 case Opt_fmode:
 606                         if (match_octal(args, &option))
 607                                 return 0;
 608                         uopt->fmode = option & 0777;
 609                         break;
 610                 case Opt_dmode:
 611                         if (match_octal(args, &option))
 612                                 return 0;
 613                         uopt->dmode = option & 0777;
 614                         break;
 615                 default:
 616                         pr_err("bad mount option \"%s\" or missing value\n", p);
 617                         return 0;
 618                 }
 619         }
 620         return 1;
 621 }
 622
 623 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
 624 {
 625         struct udf_options uopt;
 626         struct udf_sb_info *sbi = UDF_SB(sb);
 627         int error = 0;
 628
 629         uopt.flags = sbi->s_flags;
 630         uopt.uid   = sbi->s_uid;
 631         uopt.gid   = sbi->s_gid;
 632         uopt.umask = sbi->s_umask;
 633         uopt.fmode = sbi->s_fmode;
 634         uopt.dmode = sbi->s_dmode;
 635
 636         if (!udf_parse_options(options, &uopt, true))
 637                 return -EINVAL;
 638
 639         write_lock(&sbi->s_cred_lock);
 640         sbi->s_flags = uopt.flags;
 641         sbi->s_uid   = uopt.uid;
 642         sbi->s_gid   = uopt.gid;
 643         sbi->s_umask = uopt.umask;
 644         sbi->s_fmode = uopt.fmode;
 645         sbi->s_dmode = uopt.dmode;
 646         write_unlock(&sbi->s_cred_lock);
 647
 648         if (sbi->s_lvid_bh) {
 649                 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
 650                 if (write_rev > UDF_MAX_WRITE_VERSION)
 651                         *flags |= MS_RDONLY;
 652         }
 653
 654         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
 655                 goto out_unlock;
 656
 657         if (*flags & MS_RDONLY)
 658                 udf_close_lvid(sb);
 659         else
 660                 udf_open_lvid(sb);
 661
 662 out_unlock:
 663         return error;
 664 }
 665
 666 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
 667 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
 668 static loff_t udf_check_vsd(struct super_block *sb)
 669 {
 670         struct volStructDesc *vsd = NULL;
 671         loff_t sector = 32768;
 672         int sectorsize;
 673         struct buffer_head *bh = NULL;
 674         int nsr02 = 0;
 675         int nsr03 = 0;
 676         struct udf_sb_info *sbi;
 677
 678         sbi = UDF_SB(sb);
 679         if (sb->s_blocksize < sizeof(struct volStructDesc))
 680                 sectorsize = sizeof(struct volStructDesc);
 681         else
 682                 sectorsize = sb->s_blocksize;
 683
 684         sector += (sbi->s_session << sb->s_blocksize_bits);
 685
 686         udf_debug("Starting at sector %u (%ld byte sectors)\n",
 687                   (unsigned int)(sector >> sb->s_blocksize_bits),
 688                   sb->s_blocksize);
 689         /* Process the sequence (if applicable) */
 690         for (; !nsr02 && !nsr03; sector += sectorsize) {
 691                 /* Read a block */
 692                 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
 693                 if (!bh)
 694                         break;
 695
 696                 /* Look for ISO  descriptors */
 697                 vsd = (struct volStructDesc *)(bh->b_data +
 698                                               (sector & (sb->s_blocksize - 1)));
 699
 700                 if (vsd->stdIdent[0] == 0) {
 701                         brelse(bh);
 702                         break;
 703                 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
 704                                     VSD_STD_ID_LEN)) {
 705                         switch (vsd->structType) {
 706                         case 0:
 707                                 udf_debug("ISO9660 Boot Record found\n");
 708                                 break;
 709                         case 1:
 710                                 udf_debug("ISO9660 Primary Volume Descriptor found\n");
 711                                 break;
 712                         case 2:
 713                                 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
 714                                 break;
 715                         case 3:
 716                                 udf_debug("ISO9660 Volume Partition Descriptor found\n");
 717                                 break;
 718                         case 255:
 719                                 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
 720                                 break;
 721                         default:
 722                                 udf_debug("ISO9660 VRS (%u) found\n",
 723                                           vsd->structType);
 724                                 break;
 725                         }
 726                 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
 727                                     VSD_STD_ID_LEN))
 728                         ; /* nothing */
 729                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
 730                                     VSD_STD_ID_LEN)) {
 731                         brelse(bh);
 732                         break;
 733                 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
 734                                     VSD_STD_ID_LEN))
 735                         nsr02 = sector;
 736                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
 737                                     VSD_STD_ID_LEN))
 738                         nsr03 = sector;
 739                 brelse(bh);
 740         }
 741
 742         if (nsr03)
 743                 return nsr03;
 744         else if (nsr02)
 745                 return nsr02;
 746         else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
 747                 return -1;
 748         else
 749                 return 0;
 750 }
 751
 752 static int udf_find_fileset(struct super_block *sb,
 753                             struct kernel_lb_addr *fileset,
 754                             struct kernel_lb_addr *root)
 755 {
 756         struct buffer_head *bh = NULL;
 757         long lastblock;
 758         uint16_t ident;
 759         struct udf_sb_info *sbi;
 760
 761         if (fileset->logicalBlockNum != 0xFFFFFFFF ||
 762             fileset->partitionReferenceNum != 0xFFFF) {
 763                 bh = udf_read_ptagged(sb, fileset, 0, &ident);
 764
 765                 if (!bh) {
 766                         return 1;
 767                 } else if (ident != TAG_IDENT_FSD) {
 768                         brelse(bh);
 769                         return 1;
 770                 }
 771
 772         }
 773
 774         sbi = UDF_SB(sb);
 775         if (!bh) {
 776                 /* Search backwards through the partitions */
 777                 struct kernel_lb_addr newfileset;
 778
 779 /* --> cvg: FIXME - is it reasonable? */
 780                 return 1;
 781
 782                 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
 783                      (newfileset.partitionReferenceNum != 0xFFFF &&
 784                       fileset->logicalBlockNum == 0xFFFFFFFF &&
 785                       fileset->partitionReferenceNum == 0xFFFF);
 786                      newfileset.partitionReferenceNum--) {
 787                         lastblock = sbi->s_partmaps
 788                                         [newfileset.partitionReferenceNum]
 789                                                 .s_partition_len;
 790                         newfileset.logicalBlockNum = 0;
 791
 792                         do {
 793                                 bh = udf_read_ptagged(sb, &newfileset, 0,
 794                                                       &ident);
 795                                 if (!bh) {
 796                                         newfileset.logicalBlockNum++;
 797                                         continue;
 798                                 }
 799
 800                                 switch (ident) {
 801                                 case TAG_IDENT_SBD:
 802                                 {
 803                                         struct spaceBitmapDesc *sp;
 804                                         sp = (struct spaceBitmapDesc *)
 805                                                                 bh->b_data;
 806                                         newfileset.logicalBlockNum += 1 +
 807                                                 ((le32_to_cpu(sp->numOfBytes) +
 808                                                   sizeof(struct spaceBitmapDesc)
 809                                                   - 1) >> sb->s_blocksize_bits);
 810                                         brelse(bh);
 811                                         break;
 812                                 }
 813                                 case TAG_IDENT_FSD:
 814                                         *fileset = newfileset;
 815                                         break;
 816                                 default:
 817                                         newfileset.logicalBlockNum++;
 818                                         brelse(bh);
 819                                         bh = NULL;
 820                                         break;
 821                                 }
 822                         } while (newfileset.logicalBlockNum < lastblock &&
 823                                  fileset->logicalBlockNum == 0xFFFFFFFF &&
 824                                  fileset->partitionReferenceNum == 0xFFFF);
 825                 }
 826         }
 827
 828         if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
 829              fileset->partitionReferenceNum != 0xFFFF) && bh) {
 830                 udf_debug("Fileset at block=%d, partition=%d\n",
 831                           fileset->logicalBlockNum,
 832                           fileset->partitionReferenceNum);
 833
 834                 sbi->s_partition = fileset->partitionReferenceNum;
 835                 udf_load_fileset(sb, bh, root);
 836                 brelse(bh);
 837                 return 0;
 838         }
 839         return 1;
 840 }
 841
 842 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
 843 {
 844         struct primaryVolDesc *pvoldesc;
 845         struct ustr *instr, *outstr;
 846         struct buffer_head *bh;
 847         uint16_t ident;
 848         int ret = 1;
 849
 850         instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
 851         if (!instr)
 852                 return 1;
 853
 854         outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
 855         if (!outstr)
 856                 goto out1;
 857
 858         bh = udf_read_tagged(sb, block, block, &ident);
 859         if (!bh)
 860                 goto out2;
 861
 862         BUG_ON(ident != TAG_IDENT_PVD);
 863
 864         pvoldesc = (struct primaryVolDesc *)bh->b_data;
 865
 866         if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
 867                               pvoldesc->recordingDateAndTime)) {
 868 #ifdef UDFFS_DEBUG
 869                 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
 870                 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
 871                           le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
 872                           ts->minute, le16_to_cpu(ts->typeAndTimezone));
 873 #endif
 874         }
 875
 876         if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
 877                 if (udf_CS0toUTF8(outstr, instr)) {
 878                         strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
 879                                 outstr->u_len > 31 ? 31 : outstr->u_len);
 880                         udf_debug("volIdent[] = '%s'\n",
 881                                   UDF_SB(sb)->s_volume_ident);
 882                 }
 883
 884         if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
 885                 if (udf_CS0toUTF8(outstr, instr))
 886                         udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
 887
 888         brelse(bh);
 889         ret = 0;
 890 out2:
 891         kfree(outstr);
 892 out1:
 893         kfree(instr);
 894         return ret;
 895 }
 896
 897 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
 898                                         u32 meta_file_loc, u32 partition_num)
 899 {
 900         struct kernel_lb_addr addr;
 901         struct inode *metadata_fe;
 902
 903         addr.logicalBlockNum = meta_file_loc;
 904         addr.partitionReferenceNum = partition_num;
 905
 906         metadata_fe = udf_iget(sb, &addr);
 907
 908         if (metadata_fe == NULL)
 909                 udf_warn(sb, "metadata inode efe not found\n");
 910         else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
 911                 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
 912                 iput(metadata_fe);
 913                 metadata_fe = NULL;
 914         }
 915
 916         return metadata_fe;
 917 }
 918
 919 static int udf_load_metadata_files(struct super_block *sb, int partition)
 920 {
 921         struct udf_sb_info *sbi = UDF_SB(sb);
 922         struct udf_part_map *map;
 923         struct udf_meta_data *mdata;
 924         struct kernel_lb_addr addr;
 925
 926         map = &sbi->s_partmaps[partition];
 927         mdata = &map->s_type_specific.s_metadata;
 928
 929         /* metadata address */
 930         udf_debug("Metadata file location: block = %d part = %d\n",
 931                   mdata->s_meta_file_loc, map->s_partition_num);
 932
 933         mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
 934                 mdata->s_meta_file_loc, map->s_partition_num);
 935
 936         if (mdata->s_metadata_fe == NULL) {
 937                 /* mirror file entry */
 938                 udf_debug("Mirror metadata file location: block = %d part = %d\n",
 939                           mdata->s_mirror_file_loc, map->s_partition_num);
 940
 941                 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
 942                         mdata->s_mirror_file_loc, map->s_partition_num);
 943
 944                 if (mdata->s_mirror_fe == NULL) {
 945                         udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
 946                         goto error_exit;
 947                 }
 948         }
 949
 950         /*
 951          * bitmap file entry
 952          * Note:
 953          * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
 954         */
 955         if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
 956                 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
 957                 addr.partitionReferenceNum = map->s_partition_num;
 958
 959                 udf_debug("Bitmap file location: block = %d part = %d\n",
 960                           addr.logicalBlockNum, addr.partitionReferenceNum);
 961
 962                 mdata->s_bitmap_fe = udf_iget(sb, &addr);
 963
 964                 if (mdata->s_bitmap_fe == NULL) {
 965                         if (sb->s_flags & MS_RDONLY)
 966                                 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
 967                         else {
 968                                 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
 969                                 goto error_exit;
 970                         }
 971                 }
 972         }
 973
 974         udf_debug("udf_load_metadata_files Ok\n");
 975
 976         return 0;
 977
 978 error_exit:
 979         return 1;
 980 }
 981
 982 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
 983                              struct kernel_lb_addr *root)
 984 {
 985         struct fileSetDesc *fset;
 986
 987         fset = (struct fileSetDesc *)bh->b_data;
 988
 989         *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
 990
 991         UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
 992
 993         udf_debug("Rootdir at block=%d, partition=%d\n",
 994                   root->logicalBlockNum, root->partitionReferenceNum);
 995 }
 996
 997 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
 998 {
 999         struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1000         return DIV_ROUND_UP(map->s_partition_len +
1001                             (sizeof(struct spaceBitmapDesc) << 3),
1002                             sb->s_blocksize * 8);
1003 }
1004
1005 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1006 {
1007         struct udf_bitmap *bitmap;
1008         int nr_groups;
1009         int size;
1010
1011         nr_groups = udf_compute_nr_groups(sb, index);
1012         size = sizeof(struct udf_bitmap) +
1013                 (sizeof(struct buffer_head *) * nr_groups);
1014
1015         if (size <= PAGE_SIZE)
1016                 bitmap = kzalloc(size, GFP_KERNEL);
1017         else
1018                 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
1019
1020         if (bitmap == NULL)
1021                 return NULL;
1022
1023         bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
1024         bitmap->s_nr_groups = nr_groups;
1025         return bitmap;
1026 }
1027
1028 static int udf_fill_partdesc_info(struct super_block *sb,
1029                 struct partitionDesc *p, int p_index)
1030 {
1031         struct udf_part_map *map;
1032         struct udf_sb_info *sbi = UDF_SB(sb);
1033         struct partitionHeaderDesc *phd;
1034
1035         map = &sbi->s_partmaps[p_index];
1036
1037         map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1038         map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1039
1040         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1041                 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1042         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1043                 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1044         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1045                 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1046         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1047                 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1048
1049         udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1050                   p_index, map->s_partition_type,
1051                   map->s_partition_root, map->s_partition_len);
1052
1053         if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1054             strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1055                 return 0;
1056
1057         phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1058         if (phd->unallocSpaceTable.extLength) {
1059                 struct kernel_lb_addr loc = {
1060                         .logicalBlockNum = le32_to_cpu(
1061                                 phd->unallocSpaceTable.extPosition),
1062                         .partitionReferenceNum = p_index,
1063                 };
1064
1065                 map->s_uspace.s_table = udf_iget(sb, &loc);
1066                 if (!map->s_uspace.s_table) {
1067                         udf_debug("cannot load unallocSpaceTable (part %d)\n",
1068                                   p_index);
1069                         return 1;
1070                 }
1071                 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1072                 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1073                           p_index, map->s_uspace.s_table->i_ino);
1074         }
1075
1076         if (phd->unallocSpaceBitmap.extLength) {
1077                 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1078                 if (!bitmap)
1079                         return 1;
1080                 map->s_uspace.s_bitmap = bitmap;
1081                 bitmap->s_extLength = le32_to_cpu(
1082                                 phd->unallocSpaceBitmap.extLength);
1083                 bitmap->s_extPosition = le32_to_cpu(
1084                                 phd->unallocSpaceBitmap.extPosition);
1085                 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1086                 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1087                           p_index, bitmap->s_extPosition);
1088         }
1089
1090         if (phd->partitionIntegrityTable.extLength)
1091                 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1092
1093         if (phd->freedSpaceTable.extLength) {
1094                 struct kernel_lb_addr loc = {
1095                         .logicalBlockNum = le32_to_cpu(
1096                                 phd->freedSpaceTable.extPosition),
1097                         .partitionReferenceNum = p_index,
1098                 };
1099
1100                 map->s_fspace.s_table = udf_iget(sb, &loc);
1101                 if (!map->s_fspace.s_table) {
1102                         udf_debug("cannot load freedSpaceTable (part %d)\n",
1103                                   p_index);
1104                         return 1;
1105                 }
1106
1107                 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1108                 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1109                           p_index, map->s_fspace.s_table->i_ino);
1110         }
1111
1112         if (phd->freedSpaceBitmap.extLength) {
1113                 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1114                 if (!bitmap)
1115                         return 1;
1116                 map->s_fspace.s_bitmap = bitmap;
1117                 bitmap->s_extLength = le32_to_cpu(
1118                                 phd->freedSpaceBitmap.extLength);
1119                 bitmap->s_extPosition = le32_to_cpu(
1120                                 phd->freedSpaceBitmap.extPosition);
1121                 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1122                 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1123                           p_index, bitmap->s_extPosition);
1124         }
1125         return 0;
1126 }
1127
1128 static void udf_find_vat_block(struct super_block *sb, int p_index,
1129                                int type1_index, sector_t start_block)
1130 {
1131         struct udf_sb_info *sbi = UDF_SB(sb);
1132         struct udf_part_map *map = &sbi->s_partmaps[p_index];
1133         sector_t vat_block;
1134         struct kernel_lb_addr ino;
1135
1136         /*
1137          * VAT file entry is in the last recorded block. Some broken disks have
1138          * it a few blocks before so try a bit harder...
1139          */
1140         ino.partitionReferenceNum = type1_index;
1141         for (vat_block = start_block;
1142              vat_block >= map->s_partition_root &&
1143              vat_block >= start_block - 3 &&
1144              !sbi->s_vat_inode; vat_block--) {
1145                 ino.logicalBlockNum = vat_block - map->s_partition_root;
1146                 sbi->s_vat_inode = udf_iget(sb, &ino);
1147         }
1148 }
1149
1150 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1151 {
1152         struct udf_sb_info *sbi = UDF_SB(sb);
1153         struct udf_part_map *map = &sbi->s_partmaps[p_index];
1154         struct buffer_head *bh = NULL;
1155         struct udf_inode_info *vati;
1156         uint32_t pos;
1157         struct virtualAllocationTable20 *vat20;
1158         sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1159
1160         udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1161         if (!sbi->s_vat_inode &&
1162             sbi->s_last_block != blocks - 1) {
1163                 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1164                           (unsigned long)sbi->s_last_block,
1165                           (unsigned long)blocks - 1);
1166                 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1167         }
1168         if (!sbi->s_vat_inode)
1169                 return 1;
1170
1171         if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1172                 map->s_type_specific.s_virtual.s_start_offset = 0;
1173                 map->s_type_specific.s_virtual.s_num_entries =
1174                         (sbi->s_vat_inode->i_size - 36) >> 2;
1175         } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1176                 vati = UDF_I(sbi->s_vat_inode);
1177                 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1178                         pos = udf_block_map(sbi->s_vat_inode, 0);
1179                         bh = sb_bread(sb, pos);
1180                         if (!bh)
1181                                 return 1;
1182                         vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1183                 } else {
1184                         vat20 = (struct virtualAllocationTable20 *)
1185                                                         vati->i_ext.i_data;
1186                 }
1187
1188                 map->s_type_specific.s_virtual.s_start_offset =
1189                         le16_to_cpu(vat20->lengthHeader);
1190                 map->s_type_specific.s_virtual.s_num_entries =
1191                         (sbi->s_vat_inode->i_size -
1192                                 map->s_type_specific.s_virtual.
1193                                         s_start_offset) >> 2;
1194                 brelse(bh);
1195         }
1196         return 0;
1197 }
1198
1199 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1200 {
1201         struct buffer_head *bh;
1202         struct partitionDesc *p;
1203         struct udf_part_map *map;
1204         struct udf_sb_info *sbi = UDF_SB(sb);
1205         int i, type1_idx;
1206         uint16_t partitionNumber;
1207         uint16_t ident;
1208         int ret = 0;
1209
1210         bh = udf_read_tagged(sb, block, block, &ident);
1211         if (!bh)
1212                 return 1;
1213         if (ident != TAG_IDENT_PD)
1214                 goto out_bh;
1215
1216         p = (struct partitionDesc *)bh->b_data;
1217         partitionNumber = le16_to_cpu(p->partitionNumber);
1218
1219         /* First scan for TYPE1, SPARABLE and METADATA partitions */
1220         for (i = 0; i < sbi->s_partitions; i++) {
1221                 map = &sbi->s_partmaps[i];
1222                 udf_debug("Searching map: (%d == %d)\n",
1223                           map->s_partition_num, partitionNumber);
1224                 if (map->s_partition_num == partitionNumber &&
1225                     (map->s_partition_type == UDF_TYPE1_MAP15 ||
1226                      map->s_partition_type == UDF_SPARABLE_MAP15))
1227                         break;
1228         }
1229
1230         if (i >= sbi->s_partitions) {
1231                 udf_debug("Partition (%d) not found in partition map\n",
1232                           partitionNumber);
1233                 goto out_bh;
1234         }
1235
1236         ret = udf_fill_partdesc_info(sb, p, i);
1237
1238         /*
1239          * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1240          * PHYSICAL partitions are already set up
1241          */
1242         type1_idx = i;
1243         for (i = 0; i < sbi->s_partitions; i++) {
1244                 map = &sbi->s_partmaps[i];
1245
1246                 if (map->s_partition_num == partitionNumber &&
1247                     (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1248                      map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1249                      map->s_partition_type == UDF_METADATA_MAP25))
1250                         break;
1251         }
1252
1253         if (i >= sbi->s_partitions)
1254                 goto out_bh;
1255
1256         ret = udf_fill_partdesc_info(sb, p, i);
1257         if (ret)
1258                 goto out_bh;
1259
1260         if (map->s_partition_type == UDF_METADATA_MAP25) {
1261                 ret = udf_load_metadata_files(sb, i);
1262                 if (ret) {
1263                         udf_err(sb, "error loading MetaData partition map %d\n",
1264                                 i);
1265                         goto out_bh;
1266                 }
1267         } else {
1268                 ret = udf_load_vat(sb, i, type1_idx);
1269                 if (ret)
1270                         goto out_bh;
1271                 /*
1272                  * Mark filesystem read-only if we have a partition with
1273                  * virtual map since we don't handle writing to it (we
1274                  * overwrite blocks instead of relocating them).
1275                  */
1276                 sb->s_flags |= MS_RDONLY;
1277                 pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n");
1278         }
1279 out_bh:
1280         /* In case loading failed, we handle cleanup in udf_fill_super */
1281         brelse(bh);
1282         return ret;
1283 }
1284
1285 static int udf_load_sparable_map(struct super_block *sb,
1286                                  struct udf_part_map *map,
1287                                  struct sparablePartitionMap *spm)
1288 {
1289         uint32_t loc;
1290         uint16_t ident;
1291         struct sparingTable *st;
1292         struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1293         int i;
1294         struct buffer_head *bh;
1295
1296         map->s_partition_type = UDF_SPARABLE_MAP15;
1297         sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1298         if (!is_power_of_2(sdata->s_packet_len)) {
1299                 udf_err(sb, "error loading logical volume descriptor: "
1300                         "Invalid packet length %u\n",
1301                         (unsigned)sdata->s_packet_len);
1302                 return -EIO;
1303         }
1304         if (spm->numSparingTables > 4) {
1305                 udf_err(sb, "error loading logical volume descriptor: "
1306                         "Too many sparing tables (%d)\n",
1307                         (int)spm->numSparingTables);
1308                 return -EIO;
1309         }
1310
1311         for (i = 0; i < spm->numSparingTables; i++) {
1312                 loc = le32_to_cpu(spm->locSparingTable[i]);
1313                 bh = udf_read_tagged(sb, loc, loc, &ident);
1314                 if (!bh)
1315                         continue;
1316
1317                 st = (struct sparingTable *)bh->b_data;
1318                 if (ident != 0 ||
1319                     strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1320                             strlen(UDF_ID_SPARING)) ||
1321                     sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1322                                                         sb->s_blocksize) {
1323                         brelse(bh);
1324                         continue;
1325                 }
1326
1327                 sdata->s_spar_map[i] = bh;
1328         }
1329         map->s_partition_func = udf_get_pblock_spar15;
1330         return 0;
1331 }
1332
1333 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1334                                struct kernel_lb_addr *fileset)
1335 {
1336         struct logicalVolDesc *lvd;
1337         int i, offset;
1338         uint8_t type;
1339         struct udf_sb_info *sbi = UDF_SB(sb);
1340         struct genericPartitionMap *gpm;
1341         uint16_t ident;
1342         struct buffer_head *bh;
1343         unsigned int table_len;
1344         int ret = 0;
1345
1346         bh = udf_read_tagged(sb, block, block, &ident);
1347         if (!bh)
1348                 return 1;
1349         BUG_ON(ident != TAG_IDENT_LVD);
1350         lvd = (struct logicalVolDesc *)bh->b_data;
1351         table_len = le32_to_cpu(lvd->mapTableLength);
1352         if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1353                 udf_err(sb, "error loading logical volume descriptor: "
1354                         "Partition table too long (%u > %lu)\n", table_len,
1355                         sb->s_blocksize - sizeof(*lvd));
1356                 ret = 1;
1357                 goto out_bh;
1358         }
1359
1360         ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1361         if (ret)
1362                 goto out_bh;
1363
1364         for (i = 0, offset = 0;
1365              i < sbi->s_partitions && offset < table_len;
1366              i++, offset += gpm->partitionMapLength) {
1367                 struct udf_part_map *map = &sbi->s_partmaps[i];
1368                 gpm = (struct genericPartitionMap *)
1369                                 &(lvd->partitionMaps[offset]);
1370                 type = gpm->partitionMapType;
1371                 if (type == 1) {
1372                         struct genericPartitionMap1 *gpm1 =
1373                                 (struct genericPartitionMap1 *)gpm;
1374                         map->s_partition_type = UDF_TYPE1_MAP15;
1375                         map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1376                         map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1377                         map->s_partition_func = NULL;
1378                 } else if (type == 2) {
1379                         struct udfPartitionMap2 *upm2 =
1380                                                 (struct udfPartitionMap2 *)gpm;
1381                         if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1382                                                 strlen(UDF_ID_VIRTUAL))) {
1383                                 u16 suf =
1384                                         le16_to_cpu(((__le16 *)upm2->partIdent.
1385                                                         identSuffix)[0]);
1386                                 if (suf < 0x0200) {
1387                                         map->s_partition_type =
1388                                                         UDF_VIRTUAL_MAP15;
1389                                         map->s_partition_func =
1390                                                         udf_get_pblock_virt15;
1391                                 } else {
1392                                         map->s_partition_type =
1393                                                         UDF_VIRTUAL_MAP20;
1394                                         map->s_partition_func =
1395                                                         udf_get_pblock_virt20;
1396                                 }
1397                         } else if (!strncmp(upm2->partIdent.ident,
1398                                                 UDF_ID_SPARABLE,
1399                                                 strlen(UDF_ID_SPARABLE))) {
1400                                 if (udf_load_sparable_map(sb, map,
1401                                     (struct sparablePartitionMap *)gpm) < 0) {
1402                                         ret = 1;
1403                                         goto out_bh;
1404                                 }
1405                         } else if (!strncmp(upm2->partIdent.ident,
1406                                                 UDF_ID_METADATA,
1407                                                 strlen(UDF_ID_METADATA))) {
1408                                 struct udf_meta_data *mdata =
1409                                         &map->s_type_specific.s_metadata;
1410                                 struct metadataPartitionMap *mdm =
1411                                                 (struct metadataPartitionMap *)
1412                                                 &(lvd->partitionMaps[offset]);
1413                                 udf_debug("Parsing Logical vol part %d type %d  id=%s\n",
1414                                           i, type, UDF_ID_METADATA);
1415
1416                                 map->s_partition_type = UDF_METADATA_MAP25;
1417                                 map->s_partition_func = udf_get_pblock_meta25;
1418
1419                                 mdata->s_meta_file_loc   =
1420                                         le32_to_cpu(mdm->metadataFileLoc);
1421                                 mdata->s_mirror_file_loc =
1422                                         le32_to_cpu(mdm->metadataMirrorFileLoc);
1423                                 mdata->s_bitmap_file_loc =
1424                                         le32_to_cpu(mdm->metadataBitmapFileLoc);
1425                                 mdata->s_alloc_unit_size =
1426                                         le32_to_cpu(mdm->allocUnitSize);
1427                                 mdata->s_align_unit_size =
1428                                         le16_to_cpu(mdm->alignUnitSize);
1429                                 if (mdm->flags & 0x01)
1430                                         mdata->s_flags |= MF_DUPLICATE_MD;
1431
1432                                 udf_debug("Metadata Ident suffix=0x%x\n",
1433                                           le16_to_cpu(*(__le16 *)
1434                                                       mdm->partIdent.identSuffix));
1435                                 udf_debug("Metadata part num=%d\n",
1436                                           le16_to_cpu(mdm->partitionNum));
1437                                 udf_debug("Metadata part alloc unit size=%d\n",
1438                                           le32_to_cpu(mdm->allocUnitSize));
1439                                 udf_debug("Metadata file loc=%d\n",
1440                                           le32_to_cpu(mdm->metadataFileLoc));
1441                                 udf_debug("Mirror file loc=%d\n",
1442                                           le32_to_cpu(mdm->metadataMirrorFileLoc));
1443                                 udf_debug("Bitmap file loc=%d\n",
1444                                           le32_to_cpu(mdm->metadataBitmapFileLoc));
1445                                 udf_debug("Flags: %d %d\n",
1446                                           mdata->s_flags, mdm->flags);
1447                         } else {
1448                                 udf_debug("Unknown ident: %s\n",
1449                                           upm2->partIdent.ident);
1450                                 continue;
1451                         }
1452                         map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1453                         map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1454                 }
1455                 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1456                           i, map->s_partition_num, type, map->s_volumeseqnum);
1457         }
1458
1459         if (fileset) {
1460                 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1461
1462                 *fileset = lelb_to_cpu(la->extLocation);
1463                 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1464                           fileset->logicalBlockNum,
1465                           fileset->partitionReferenceNum);
1466         }
1467         if (lvd->integritySeqExt.extLength)
1468                 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1469
1470 out_bh:
1471         brelse(bh);
1472         return ret;
1473 }
1474
1475 /*
1476  * udf_load_logicalvolint
1477  *
1478  */
1479 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1480 {
1481         struct buffer_head *bh = NULL;
1482         uint16_t ident;
1483         struct udf_sb_info *sbi = UDF_SB(sb);
1484         struct logicalVolIntegrityDesc *lvid;
1485
1486         while (loc.extLength > 0 &&
1487                (bh = udf_read_tagged(sb, loc.extLocation,
1488                                      loc.extLocation, &ident)) &&
1489                ident == TAG_IDENT_LVID) {
1490                 sbi->s_lvid_bh = bh;
1491                 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1492
1493                 if (lvid->nextIntegrityExt.extLength)
1494                         udf_load_logicalvolint(sb,
1495                                 leea_to_cpu(lvid->nextIntegrityExt));
1496
1497                 if (sbi->s_lvid_bh != bh)
1498                         brelse(bh);
1499                 loc.extLength -= sb->s_blocksize;
1500                 loc.extLocation++;
1501         }
1502         if (sbi->s_lvid_bh != bh)
1503                 brelse(bh);
1504 }
1505
1506 /*
1507  * udf_process_sequence
1508  *
1509  * PURPOSE
1510  *      Process a main/reserve volume descriptor sequence.
1511  *
1512  * PRE-CONDITIONS
1513  *      sb                      Pointer to _locked_ superblock.
1514  *      block                   First block of first extent of the sequence.
1515  *      lastblock               Lastblock of first extent of the sequence.
1516  *
1517  * HISTORY
1518  *      July 1, 1997 - Andrew E. Mileski
1519  *      Written, tested, and released.
1520  */
1521 static noinline int udf_process_sequence(struct super_block *sb, long block,
1522                                 long lastblock, struct kernel_lb_addr *fileset)
1523 {
1524         struct buffer_head *bh = NULL;
1525         struct udf_vds_record vds[VDS_POS_LENGTH];
1526         struct udf_vds_record *curr;
1527         struct generic_desc *gd;
1528         struct volDescPtr *vdp;
1529         int done = 0;
1530         uint32_t vdsn;
1531         uint16_t ident;
1532         long next_s = 0, next_e = 0;
1533
1534         memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1535
1536         /*
1537          * Read the main descriptor sequence and find which descriptors
1538          * are in it.
1539          */
1540         for (; (!done && block <= lastblock); block++) {
1541
1542                 bh = udf_read_tagged(sb, block, block, &ident);
1543                 if (!bh) {
1544                         udf_err(sb,
1545                                 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1546                                 (unsigned long long)block);
1547                         return 1;
1548                 }
1549
1550                 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1551                 gd = (struct generic_desc *)bh->b_data;
1552                 vdsn = le32_to_cpu(gd->volDescSeqNum);
1553                 switch (ident) {
1554                 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1555                         curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1556                         if (vdsn >= curr->volDescSeqNum) {
1557                                 curr->volDescSeqNum = vdsn;
1558                                 curr->block = block;
1559                         }
1560                         break;
1561                 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1562                         curr = &vds[VDS_POS_VOL_DESC_PTR];
1563                         if (vdsn >= curr->volDescSeqNum) {
1564                                 curr->volDescSeqNum = vdsn;
1565                                 curr->block = block;
1566
1567                                 vdp = (struct volDescPtr *)bh->b_data;
1568                                 next_s = le32_to_cpu(
1569                                         vdp->nextVolDescSeqExt.extLocation);
1570                                 next_e = le32_to_cpu(
1571                                         vdp->nextVolDescSeqExt.extLength);
1572                                 next_e = next_e >> sb->s_blocksize_bits;
1573                                 next_e += next_s;
1574                         }
1575                         break;
1576                 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1577                         curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1578                         if (vdsn >= curr->volDescSeqNum) {
1579                                 curr->volDescSeqNum = vdsn;
1580                                 curr->block = block;
1581                         }
1582                         break;
1583                 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1584                         curr = &vds[VDS_POS_PARTITION_DESC];
1585                         if (!curr->block)
1586                                 curr->block = block;
1587                         break;
1588                 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1589                         curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1590                         if (vdsn >= curr->volDescSeqNum) {
1591                                 curr->volDescSeqNum = vdsn;
1592                                 curr->block = block;
1593                         }
1594                         break;
1595                 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1596                         curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1597                         if (vdsn >= curr->volDescSeqNum) {
1598                                 curr->volDescSeqNum = vdsn;
1599                                 curr->block = block;
1600                         }
1601                         break;
1602                 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1603                         vds[VDS_POS_TERMINATING_DESC].block = block;
1604                         if (next_e) {
1605                                 block = next_s;
1606                                 lastblock = next_e;
1607                                 next_s = next_e = 0;
1608                         } else
1609                                 done = 1;
1610                         break;
1611                 }
1612                 brelse(bh);
1613         }
1614         /*
1615          * Now read interesting descriptors again and process them
1616          * in a suitable order
1617          */
1618         if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1619                 udf_err(sb, "Primary Volume Descriptor not found!\n");
1620                 return 1;
1621         }
1622         if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1623                 return 1;
1624
1625         if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1626             vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1627                 return 1;
1628
1629         if (vds[VDS_POS_PARTITION_DESC].block) {
1630                 /*
1631                  * We rescan the whole descriptor sequence to find
1632                  * partition descriptor blocks and process them.
1633                  */
1634                 for (block = vds[VDS_POS_PARTITION_DESC].block;
1635                      block < vds[VDS_POS_TERMINATING_DESC].block;
1636                      block++)
1637                         if (udf_load_partdesc(sb, block))
1638                                 return 1;
1639         }
1640
1641         return 0;
1642 }
1643
1644 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1645                              struct kernel_lb_addr *fileset)
1646 {
1647         struct anchorVolDescPtr *anchor;
1648         long main_s, main_e, reserve_s, reserve_e;
1649
1650         anchor = (struct anchorVolDescPtr *)bh->b_data;
1651
1652         /* Locate the main sequence */
1653         main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1654         main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1655         main_e = main_e >> sb->s_blocksize_bits;
1656         main_e += main_s;
1657
1658         /* Locate the reserve sequence */
1659         reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1660         reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1661         reserve_e = reserve_e >> sb->s_blocksize_bits;
1662         reserve_e += reserve_s;
1663
1664         /* Process the main & reserve sequences */
1665         /* responsible for finding the PartitionDesc(s) */
1666         if (!udf_process_sequence(sb, main_s, main_e, fileset))
1667                 return 1;
1668         udf_sb_free_partitions(sb);
1669         if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset))
1670                 return 1;
1671         udf_sb_free_partitions(sb);
1672         return 0;
1673 }
1674
1675 /*
1676  * Check whether there is an anchor block in the given block and
1677  * load Volume Descriptor Sequence if so.
1678  */
1679 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1680                                   struct kernel_lb_addr *fileset)
1681 {
1682         struct buffer_head *bh;
1683         uint16_t ident;
1684         int ret;
1685
1686         if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1687             udf_fixed_to_variable(block) >=
1688             sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1689                 return 0;
1690
1691         bh = udf_read_tagged(sb, block, block, &ident);
1692         if (!bh)
1693                 return 0;
1694         if (ident != TAG_IDENT_AVDP) {
1695                 brelse(bh);
1696                 return 0;
1697         }
1698         ret = udf_load_sequence(sb, bh, fileset);
1699         brelse(bh);
1700         return ret;
1701 }
1702
1703 /* Search for an anchor volume descriptor pointer */
1704 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1705                                  struct kernel_lb_addr *fileset)
1706 {
1707         sector_t last[6];
1708         int i;
1709         struct udf_sb_info *sbi = UDF_SB(sb);
1710         int last_count = 0;
1711
1712         /* First try user provided anchor */
1713         if (sbi->s_anchor) {
1714                 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1715                         return lastblock;
1716         }
1717         /*
1718          * according to spec, anchor is in either:
1719          *     block 256
1720          *     lastblock-256
1721          *     lastblock
1722          *  however, if the disc isn't closed, it could be 512.
1723          */
1724         if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1725                 return lastblock;
1726         /*
1727          * The trouble is which block is the last one. Drives often misreport
1728          * this so we try various possibilities.
1729          */
1730         last[last_count++] = lastblock;
1731         if (lastblock >= 1)
1732                 last[last_count++] = lastblock - 1;
1733         last[last_count++] = lastblock + 1;
1734         if (lastblock >= 2)
1735                 last[last_count++] = lastblock - 2;
1736         if (lastblock >= 150)
1737                 last[last_count++] = lastblock - 150;
1738         if (lastblock >= 152)
1739                 last[last_count++] = lastblock - 152;
1740
1741         for (i = 0; i < last_count; i++) {
1742                 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1743                                 sb->s_blocksize_bits)
1744                         continue;
1745                 if (udf_check_anchor_block(sb, last[i], fileset))
1746                         return last[i];
1747                 if (last[i] < 256)
1748                         continue;
1749                 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1750                         return last[i];
1751         }
1752
1753         /* Finally try block 512 in case media is open */
1754         if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1755                 return last[0];
1756         return 0;
1757 }
1758
1759 /*
1760  * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1761  * area specified by it. The function expects sbi->s_lastblock to be the last
1762  * block on the media.
1763  *
1764  * Return 1 if ok, 0 if not found.
1765  *
1766  */
1767 static int udf_find_anchor(struct super_block *sb,
1768                            struct kernel_lb_addr *fileset)
1769 {
1770         sector_t lastblock;
1771         struct udf_sb_info *sbi = UDF_SB(sb);
1772
1773         lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1774         if (lastblock)
1775                 goto out;
1776
1777         /* No anchor found? Try VARCONV conversion of block numbers */
1778         UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1779         /* Firstly, we try to not convert number of the last block */
1780         lastblock = udf_scan_anchors(sb,
1781                                 udf_variable_to_fixed(sbi->s_last_block),
1782                                 fileset);
1783         if (lastblock)
1784                 goto out;
1785
1786         /* Secondly, we try with converted number of the last block */
1787         lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1788         if (!lastblock) {
1789                 /* VARCONV didn't help. Clear it. */
1790                 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1791                 return 0;
1792         }
1793 out:
1794         sbi->s_last_block = lastblock;
1795         return 1;
1796 }
1797
1798 /*
1799  * Check Volume Structure Descriptor, find Anchor block and load Volume
1800  * Descriptor Sequence
1801  */
1802 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1803                         int silent, struct kernel_lb_addr *fileset)
1804 {
1805         struct udf_sb_info *sbi = UDF_SB(sb);
1806         loff_t nsr_off;
1807
1808         if (!sb_set_blocksize(sb, uopt->blocksize)) {
1809                 if (!silent)
1810                         udf_warn(sb, "Bad block size\n");
1811                 return 0;
1812         }
1813         sbi->s_last_block = uopt->lastblock;
1814         if (!uopt->novrs) {
1815                 /* Check that it is NSR02 compliant */
1816                 nsr_off = udf_check_vsd(sb);
1817                 if (!nsr_off) {
1818                         if (!silent)
1819                                 udf_warn(sb, "No VRS found\n");
1820                         return 0;
1821                 }
1822                 if (nsr_off == -1)
1823                         udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
1824                 if (!sbi->s_last_block)
1825                         sbi->s_last_block = udf_get_last_block(sb);
1826         } else {
1827                 udf_debug("Validity check skipped because of novrs option\n");
1828         }
1829
1830         /* Look for anchor block and load Volume Descriptor Sequence */
1831         sbi->s_anchor = uopt->anchor;
1832         if (!udf_find_anchor(sb, fileset)) {
1833                 if (!silent)
1834                         udf_warn(sb, "No anchor found\n");
1835                 return 0;
1836         }
1837         return 1;
1838 }
1839
1840 static void udf_open_lvid(struct super_block *sb)
1841 {
1842         struct udf_sb_info *sbi = UDF_SB(sb);
1843         struct buffer_head *bh = sbi->s_lvid_bh;
1844         struct logicalVolIntegrityDesc *lvid;
1845         struct logicalVolIntegrityDescImpUse *lvidiu;
1846
1847         if (!bh)
1848                 return;
1849
1850         mutex_lock(&sbi->s_alloc_mutex);
1851         lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1852         lvidiu = udf_sb_lvidiu(sbi);
1853
1854         lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1855         lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1856         udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1857                                 CURRENT_TIME);
1858         lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1859
1860         lvid->descTag.descCRC = cpu_to_le16(
1861                 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1862                         le16_to_cpu(lvid->descTag.descCRCLength)));
1863
1864         lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1865         mark_buffer_dirty(bh);
1866         sbi->s_lvid_dirty = 0;
1867         mutex_unlock(&sbi->s_alloc_mutex);
1868 }
1869
1870 static void udf_close_lvid(struct super_block *sb)
1871 {
1872         struct udf_sb_info *sbi = UDF_SB(sb);
1873         struct buffer_head *bh = sbi->s_lvid_bh;
1874         struct logicalVolIntegrityDesc *lvid;
1875         struct logicalVolIntegrityDescImpUse *lvidiu;
1876
1877         if (!bh)
1878                 return;
1879
1880         mutex_lock(&sbi->s_alloc_mutex);
1881         lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1882         lvidiu = udf_sb_lvidiu(sbi);
1883         lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1884         lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1885         udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1886         if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1887                 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1888         if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1889                 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1890         if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1891                 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1892         lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1893
1894         lvid->descTag.descCRC = cpu_to_le16(
1895                         crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1896                                 le16_to_cpu(lvid->descTag.descCRCLength)));
1897
1898         lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1899         /*
1900          * We set buffer uptodate unconditionally here to avoid spurious
1901          * warnings from mark_buffer_dirty() when previous EIO has marked
1902          * the buffer as !uptodate
1903          */
1904         set_buffer_uptodate(bh);
1905         mark_buffer_dirty(bh);
1906         sbi->s_lvid_dirty = 0;
1907         mutex_unlock(&sbi->s_alloc_mutex);
1908 }
1909
1910 u64 lvid_get_unique_id(struct super_block *sb)
1911 {
1912         struct buffer_head *bh;
1913         struct udf_sb_info *sbi = UDF_SB(sb);
1914         struct logicalVolIntegrityDesc *lvid;
1915         struct logicalVolHeaderDesc *lvhd;
1916         u64 uniqueID;
1917         u64 ret;
1918
1919         bh = sbi->s_lvid_bh;
1920         if (!bh)
1921                 return 0;
1922
1923         lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1924         lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1925
1926         mutex_lock(&sbi->s_alloc_mutex);
1927         ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1928         if (!(++uniqueID & 0xFFFFFFFF))
1929                 uniqueID += 16;
1930         lvhd->uniqueID = cpu_to_le64(uniqueID);
1931         mutex_unlock(&sbi->s_alloc_mutex);
1932         mark_buffer_dirty(bh);
1933
1934         return ret;
1935 }
1936
1937 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1938 {
1939         int ret;
1940         struct inode *inode = NULL;
1941         struct udf_options uopt;
1942         struct kernel_lb_addr rootdir, fileset;
1943         struct udf_sb_info *sbi;
1944
1945         uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1946         uopt.uid = INVALID_UID;
1947         uopt.gid = INVALID_GID;
1948         uopt.umask = 0;
1949         uopt.fmode = UDF_INVALID_MODE;
1950         uopt.dmode = UDF_INVALID_MODE;
1951
1952         sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1953         if (!sbi)
1954                 return -ENOMEM;
1955
1956         sb->s_fs_info = sbi;
1957
1958         mutex_init(&sbi->s_alloc_mutex);
1959
1960         if (!udf_parse_options((char *)options, &uopt, false))
1961                 goto error_out;
1962
1963         if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1964             uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1965                 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1966                 goto error_out;
1967         }
1968 #ifdef CONFIG_UDF_NLS
1969         if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1970                 uopt.nls_map = load_nls_default();
1971                 if (!uopt.nls_map)
1972                         uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1973                 else
1974                         udf_debug("Using default NLS map\n");
1975         }
1976 #endif
1977         if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1978                 uopt.flags |= (1 << UDF_FLAG_UTF8);
1979
1980         fileset.logicalBlockNum = 0xFFFFFFFF;
1981         fileset.partitionReferenceNum = 0xFFFF;
1982
1983         sbi->s_flags = uopt.flags;
1984         sbi->s_uid = uopt.uid;
1985         sbi->s_gid = uopt.gid;
1986         sbi->s_umask = uopt.umask;
1987         sbi->s_fmode = uopt.fmode;
1988         sbi->s_dmode = uopt.dmode;
1989         sbi->s_nls_map = uopt.nls_map;
1990         rwlock_init(&sbi->s_cred_lock);
1991
1992         if (uopt.session == 0xFFFFFFFF)
1993                 sbi->s_session = udf_get_last_session(sb);
1994         else
1995                 sbi->s_session = uopt.session;
1996
1997         udf_debug("Multi-session=%d\n", sbi->s_session);
1998
1999         /* Fill in the rest of the superblock */
2000         sb->s_op = &udf_sb_ops;
2001         sb->s_export_op = &udf_export_ops;
2002
2003         sb->s_magic = UDF_SUPER_MAGIC;
2004         sb->s_time_gran = 1000;
2005
2006         if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2007                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2008         } else {
2009                 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2010                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2011                 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
2012                         if (!silent)
2013                                 pr_notice("Rescanning with blocksize %d\n",
2014                                           UDF_DEFAULT_BLOCKSIZE);
2015                         brelse(sbi->s_lvid_bh);
2016                         sbi->s_lvid_bh = NULL;
2017                         uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2018                         ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2019                 }
2020         }
2021         if (!ret) {
2022                 udf_warn(sb, "No partition found (1)\n");
2023                 goto error_out;
2024         }
2025
2026         udf_debug("Lastblock=%d\n", sbi->s_last_block);
2027
2028         if (sbi->s_lvid_bh) {
2029                 struct logicalVolIntegrityDescImpUse *lvidiu =
2030                                                         udf_sb_lvidiu(sbi);
2031                 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2032                 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2033                 /* uint16_t maxUDFWriteRev =
2034                                 le16_to_cpu(lvidiu->maxUDFWriteRev); */
2035
2036                 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2037                         udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2038                                 le16_to_cpu(lvidiu->minUDFReadRev),
2039                                 UDF_MAX_READ_VERSION);
2040                         goto error_out;
2041                 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
2042                         sb->s_flags |= MS_RDONLY;
2043
2044                 sbi->s_udfrev = minUDFWriteRev;
2045
2046                 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2047                         UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2048                 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2049                         UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2050         }
2051
2052         if (!sbi->s_partitions) {
2053                 udf_warn(sb, "No partition found (2)\n");
2054                 goto error_out;
2055         }
2056
2057         if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2058                         UDF_PART_FLAG_READ_ONLY) {
2059                 pr_notice("Partition marked readonly; forcing readonly mount\n");
2060                 sb->s_flags |= MS_RDONLY;
2061         }
2062
2063         if (udf_find_fileset(sb, &fileset, &rootdir)) {
2064                 udf_warn(sb, "No fileset found\n");
2065                 goto error_out;
2066         }
2067
2068         if (!silent) {
2069                 struct timestamp ts;
2070                 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2071                 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2072                          sbi->s_volume_ident,
2073                          le16_to_cpu(ts.year), ts.month, ts.day,
2074                          ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2075         }
2076         if (!(sb->s_flags & MS_RDONLY))
2077                 udf_open_lvid(sb);
2078
2079         /* Assign the root inode */
2080         /* assign inodes by physical block number */
2081         /* perhaps it's not extensible enough, but for now ... */
2082         inode = udf_iget(sb, &rootdir);
2083         if (!inode) {
2084                 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
2085                        rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2086                 goto error_out;
2087         }
2088
2089         /* Allocate a dentry for the root inode */
2090         sb->s_root = d_make_root(inode);
2091         if (!sb->s_root) {
2092                 udf_err(sb, "Couldn't allocate root dentry\n");
2093                 goto error_out;
2094         }
2095         sb->s_maxbytes = MAX_LFS_FILESIZE;
2096         sb->s_max_links = UDF_MAX_LINKS;
2097         return 0;
2098
2099 error_out:
2100         if (sbi->s_vat_inode)
2101                 iput(sbi->s_vat_inode);
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         udf_sb_free_partitions(sb);
2110         kfree(sbi);
2111         sb->s_fs_info = NULL;
2112
2113         return -EINVAL;
2114 }
2115
2116 void _udf_err(struct super_block *sb, const char *function,
2117               const char *fmt, ...)
2118 {
2119         struct va_format vaf;
2120         va_list args;
2121
2122         va_start(args, fmt);
2123
2124         vaf.fmt = fmt;
2125         vaf.va = &args;
2126
2127         pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2128
2129         va_end(args);
2130 }
2131
2132 void _udf_warn(struct super_block *sb, const char *function,
2133                const char *fmt, ...)
2134 {
2135         struct va_format vaf;
2136         va_list args;
2137
2138         va_start(args, fmt);
2139
2140         vaf.fmt = fmt;
2141         vaf.va = &args;
2142
2143         pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2144
2145         va_end(args);
2146 }
2147
2148 static void udf_put_super(struct super_block *sb)
2149 {
2150         struct udf_sb_info *sbi;
2151
2152         sbi = UDF_SB(sb);
2153
2154         if (sbi->s_vat_inode)
2155                 iput(sbi->s_vat_inode);
2156 #ifdef CONFIG_UDF_NLS
2157         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2158                 unload_nls(sbi->s_nls_map);
2159 #endif
2160         if (!(sb->s_flags & MS_RDONLY))
2161                 udf_close_lvid(sb);
2162         brelse(sbi->s_lvid_bh);
2163         udf_sb_free_partitions(sb);
2164         kfree(sb->s_fs_info);
2165         sb->s_fs_info = NULL;
2166 }
2167
2168 static int udf_sync_fs(struct super_block *sb, int wait)
2169 {
2170         struct udf_sb_info *sbi = UDF_SB(sb);
2171
2172         mutex_lock(&sbi->s_alloc_mutex);
2173         if (sbi->s_lvid_dirty) {
2174                 /*
2175                  * Blockdevice will be synced later so we don't have to submit
2176                  * the buffer for IO
2177                  */
2178                 mark_buffer_dirty(sbi->s_lvid_bh);
2179                 sbi->s_lvid_dirty = 0;
2180         }
2181         mutex_unlock(&sbi->s_alloc_mutex);
2182
2183         return 0;
2184 }
2185
2186 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2187 {
2188         struct super_block *sb = dentry->d_sb;
2189         struct udf_sb_info *sbi = UDF_SB(sb);
2190         struct logicalVolIntegrityDescImpUse *lvidiu;
2191         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2192
2193         if (sbi->s_lvid_bh != NULL)
2194                 lvidiu = udf_sb_lvidiu(sbi);
2195         else
2196                 lvidiu = NULL;
2197
2198         buf->f_type = UDF_SUPER_MAGIC;
2199         buf->f_bsize = sb->s_blocksize;
2200         buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2201         buf->f_bfree = udf_count_free(sb);
2202         buf->f_bavail = buf->f_bfree;
2203         buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2204                                           le32_to_cpu(lvidiu->numDirs)) : 0)
2205                         + buf->f_bfree;
2206         buf->f_ffree = buf->f_bfree;
2207         buf->f_namelen = UDF_NAME_LEN - 2;
2208         buf->f_fsid.val[0] = (u32)id;
2209         buf->f_fsid.val[1] = (u32)(id >> 32);
2210
2211         return 0;
2212 }
2213
2214 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2215                                           struct udf_bitmap *bitmap)
2216 {
2217         struct buffer_head *bh = NULL;
2218         unsigned int accum = 0;
2219         int index;
2220         int block = 0, newblock;
2221         struct kernel_lb_addr loc;
2222         uint32_t bytes;
2223         uint8_t *ptr;
2224         uint16_t ident;
2225         struct spaceBitmapDesc *bm;
2226
2227         loc.logicalBlockNum = bitmap->s_extPosition;
2228         loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2229         bh = udf_read_ptagged(sb, &loc, 0, &ident);
2230
2231         if (!bh) {
2232                 udf_err(sb, "udf_count_free failed\n");
2233                 goto out;
2234         } else if (ident != TAG_IDENT_SBD) {
2235                 brelse(bh);
2236                 udf_err(sb, "udf_count_free failed\n");
2237                 goto out;
2238         }
2239
2240         bm = (struct spaceBitmapDesc *)bh->b_data;
2241         bytes = le32_to_cpu(bm->numOfBytes);
2242         index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2243         ptr = (uint8_t *)bh->b_data;
2244
2245         while (bytes > 0) {
2246                 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2247                 accum += bitmap_weight((const unsigned long *)(ptr + index),
2248                                         cur_bytes * 8);
2249                 bytes -= cur_bytes;
2250                 if (bytes) {
2251                         brelse(bh);
2252                         newblock = udf_get_lb_pblock(sb, &loc, ++block);
2253                         bh = udf_tread(sb, newblock);
2254                         if (!bh) {
2255                                 udf_debug("read failed\n");
2256                                 goto out;
2257                         }
2258                         index = 0;
2259                         ptr = (uint8_t *)bh->b_data;
2260                 }
2261         }
2262         brelse(bh);
2263 out:
2264         return accum;
2265 }
2266
2267 static unsigned int udf_count_free_table(struct super_block *sb,
2268                                          struct inode *table)
2269 {
2270         unsigned int accum = 0;
2271         uint32_t elen;
2272         struct kernel_lb_addr eloc;
2273         int8_t etype;
2274         struct extent_position epos;
2275
2276         mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2277         epos.block = UDF_I(table)->i_location;
2278         epos.offset = sizeof(struct unallocSpaceEntry);
2279         epos.bh = NULL;
2280
2281         while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2282                 accum += (elen >> table->i_sb->s_blocksize_bits);
2283
2284         brelse(epos.bh);
2285         mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2286
2287         return accum;
2288 }
2289
2290 static unsigned int udf_count_free(struct super_block *sb)
2291 {
2292         unsigned int accum = 0;
2293         struct udf_sb_info *sbi;
2294         struct udf_part_map *map;
2295
2296         sbi = UDF_SB(sb);
2297         if (sbi->s_lvid_bh) {
2298                 struct logicalVolIntegrityDesc *lvid =
2299                         (struct logicalVolIntegrityDesc *)
2300                         sbi->s_lvid_bh->b_data;
2301                 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2302                         accum = le32_to_cpu(
2303                                         lvid->freeSpaceTable[sbi->s_partition]);
2304                         if (accum == 0xFFFFFFFF)
2305                                 accum = 0;
2306                 }
2307         }
2308
2309         if (accum)
2310                 return accum;
2311
2312         map = &sbi->s_partmaps[sbi->s_partition];
2313         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2314                 accum += udf_count_free_bitmap(sb,
2315                                                map->s_uspace.s_bitmap);
2316         }
2317         if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2318                 accum += udf_count_free_bitmap(sb,
2319                                                map->s_fspace.s_bitmap);
2320         }
2321         if (accum)
2322                 return accum;
2323
2324         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2325                 accum += udf_count_free_table(sb,
2326                                               map->s_uspace.s_table);
2327         }
2328         if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2329                 accum += udf_count_free_table(sb,
2330                                               map->s_fspace.s_table);
2331         }
2332
2333         return accum;
2334 }