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         ei->cached_extent.lstart = -1;
 138         spin_lock_init(&ei->i_extent_cache_lock);
 139
 140         return &ei->vfs_inode;
 141 }
 142
 143 static void udf_i_callback(struct rcu_head *head)
 144 {
 145         struct inode *inode = container_of(head, struct inode, i_rcu);
 146         kmem_cache_free(udf_inode_cachep, UDF_I(inode));
 147 }
 148
 149 static void udf_destroy_inode(struct inode *inode)
 150 {
 151         call_rcu(&inode->i_rcu, udf_i_callback);
 152 }
 153
 154 static void init_once(void *foo)
 155 {
 156         struct udf_inode_info *ei = (struct udf_inode_info *)foo;
 157
 158         ei->i_ext.i_data = NULL;
 159         inode_init_once(&ei->vfs_inode);
 160 }
 161
 162 static int init_inodecache(void)
 163 {
 164         udf_inode_cachep = kmem_cache_create("udf_inode_cache",
 165                                              sizeof(struct udf_inode_info),
 166                                              0, (SLAB_RECLAIM_ACCOUNT |
 167                                                  SLAB_MEM_SPREAD),
 168                                              init_once);
 169         if (!udf_inode_cachep)
 170                 return -ENOMEM;
 171         return 0;
 172 }
 173
 174 static void destroy_inodecache(void)
 175 {
 176         /*
 177          * Make sure all delayed rcu free inodes are flushed before we
 178          * destroy cache.
 179          */
 180         rcu_barrier();
 181         kmem_cache_destroy(udf_inode_cachep);
 182 }
 183
 184 /* Superblock operations */
 185 static const struct super_operations udf_sb_ops = {
 186         .alloc_inode    = udf_alloc_inode,
 187         .destroy_inode  = udf_destroy_inode,
 188         .write_inode    = udf_write_inode,
 189         .evict_inode    = udf_evict_inode,
 190         .put_super      = udf_put_super,
 191         .sync_fs        = udf_sync_fs,
 192         .statfs         = udf_statfs,
 193         .remount_fs     = udf_remount_fs,
 194         .show_options   = udf_show_options,
 195 };
 196
 197 struct udf_options {
 198         unsigned char novrs;
 199         unsigned int blocksize;
 200         unsigned int session;
 201         unsigned int lastblock;
 202         unsigned int anchor;
 203         unsigned int volume;
 204         unsigned short partition;
 205         unsigned int fileset;
 206         unsigned int rootdir;
 207         unsigned int flags;
 208         umode_t umask;
 209         kgid_t gid;
 210         kuid_t uid;
 211         umode_t fmode;
 212         umode_t dmode;
 213         struct nls_table *nls_map;
 214 };
 215
 216 static int __init init_udf_fs(void)
 217 {
 218         int err;
 219
 220         err = init_inodecache();
 221         if (err)
 222                 goto out1;
 223         err = register_filesystem(&udf_fstype);
 224         if (err)
 225                 goto out;
 226
 227         return 0;
 228
 229 out:
 230         destroy_inodecache();
 231
 232 out1:
 233         return err;
 234 }
 235
 236 static void __exit exit_udf_fs(void)
 237 {
 238         unregister_filesystem(&udf_fstype);
 239         destroy_inodecache();
 240 }
 241
 242 module_init(init_udf_fs)
 243 module_exit(exit_udf_fs)
 244
 245 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
 246 {
 247         struct udf_sb_info *sbi = UDF_SB(sb);
 248
 249         sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
 250                                   GFP_KERNEL);
 251         if (!sbi->s_partmaps) {
 252                 udf_err(sb, "Unable to allocate space for %d partition maps\n",
 253                         count);
 254                 sbi->s_partitions = 0;
 255                 return -ENOMEM;
 256         }
 257
 258         sbi->s_partitions = count;
 259         return 0;
 260 }
 261
 262 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
 263 {
 264         int i;
 265         int nr_groups = bitmap->s_nr_groups;
 266         int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
 267                                                 nr_groups);
 268
 269         for (i = 0; i < nr_groups; i++)
 270                 if (bitmap->s_block_bitmap[i])
 271                         brelse(bitmap->s_block_bitmap[i]);
 272
 273         if (size <= PAGE_SIZE)
 274                 kfree(bitmap);
 275         else
 276                 vfree(bitmap);
 277 }
 278
 279 static void udf_free_partition(struct udf_part_map *map)
 280 {
 281         int i;
 282         struct udf_meta_data *mdata;
 283
 284         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
 285                 iput(map->s_uspace.s_table);
 286         if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
 287                 iput(map->s_fspace.s_table);
 288         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
 289                 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
 290         if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
 291                 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
 292         if (map->s_partition_type == UDF_SPARABLE_MAP15)
 293                 for (i = 0; i < 4; i++)
 294                         brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
 295         else if (map->s_partition_type == UDF_METADATA_MAP25) {
 296                 mdata = &map->s_type_specific.s_metadata;
 297                 iput(mdata->s_metadata_fe);
 298                 mdata->s_metadata_fe = NULL;
 299
 300                 iput(mdata->s_mirror_fe);
 301                 mdata->s_mirror_fe = NULL;
 302
 303                 iput(mdata->s_bitmap_fe);
 304                 mdata->s_bitmap_fe = NULL;
 305         }
 306 }
 307
 308 static void udf_sb_free_partitions(struct super_block *sb)
 309 {
 310         struct udf_sb_info *sbi = UDF_SB(sb);
 311         int i;
 312         if (sbi->s_partmaps == NULL)
 313                 return;
 314         for (i = 0; i < sbi->s_partitions; i++)
 315                 udf_free_partition(&sbi->s_partmaps[i]);
 316         kfree(sbi->s_partmaps);
 317         sbi->s_partmaps = NULL;
 318 }
 319
 320 static int udf_show_options(struct seq_file *seq, struct dentry *root)
 321 {
 322         struct super_block *sb = root->d_sb;
 323         struct udf_sb_info *sbi = UDF_SB(sb);
 324
 325         if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
 326                 seq_puts(seq, ",nostrict");
 327         if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
 328                 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
 329         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
 330                 seq_puts(seq, ",unhide");
 331         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
 332                 seq_puts(seq, ",undelete");
 333         if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
 334                 seq_puts(seq, ",noadinicb");
 335         if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
 336                 seq_puts(seq, ",shortad");
 337         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
 338                 seq_puts(seq, ",uid=forget");
 339         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
 340                 seq_puts(seq, ",uid=ignore");
 341         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
 342                 seq_puts(seq, ",gid=forget");
 343         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
 344                 seq_puts(seq, ",gid=ignore");
 345         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
 346                 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
 347         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
 348                 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
 349         if (sbi->s_umask != 0)
 350                 seq_printf(seq, ",umask=%ho", sbi->s_umask);
 351         if (sbi->s_fmode != UDF_INVALID_MODE)
 352                 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
 353         if (sbi->s_dmode != UDF_INVALID_MODE)
 354                 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
 355         if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
 356                 seq_printf(seq, ",session=%u", sbi->s_session);
 357         if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
 358                 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
 359         if (sbi->s_anchor != 0)
 360                 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
 361         /*
 362          * volume, partition, fileset and rootdir seem to be ignored
 363          * currently
 364          */
 365         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
 366                 seq_puts(seq, ",utf8");
 367         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
 368                 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
 369
 370         return 0;
 371 }
 372
 373 /*
 374  * udf_parse_options
 375  *
 376  * PURPOSE
 377  *      Parse mount options.
 378  *
 379  * DESCRIPTION
 380  *      The following mount options are supported:
 381  *
 382  *      gid=            Set the default group.
 383  *      umask=          Set the default umask.
 384  *      mode=           Set the default file permissions.
 385  *      dmode=          Set the default directory permissions.
 386  *      uid=            Set the default user.
 387  *      bs=             Set the block size.
 388  *      unhide          Show otherwise hidden files.
 389  *      undelete        Show deleted files in lists.
 390  *      adinicb         Embed data in the inode (default)
 391  *      noadinicb       Don't embed data in the inode
 392  *      shortad         Use short ad's
 393  *      longad          Use long ad's (default)
 394  *      nostrict        Unset strict conformance
 395  *      iocharset=      Set the NLS character set
 396  *
 397  *      The remaining are for debugging and disaster recovery:
 398  *
 399  *      novrs           Skip volume sequence recognition
 400  *
 401  *      The following expect a offset from 0.
 402  *
 403  *      session=        Set the CDROM session (default= last session)
 404  *      anchor=         Override standard anchor location. (default= 256)
 405  *      volume=         Override the VolumeDesc location. (unused)
 406  *      partition=      Override the PartitionDesc location. (unused)
 407  *      lastblock=      Set the last block of the filesystem/
 408  *
 409  *      The following expect a offset from the partition root.
 410  *
 411  *      fileset=        Override the fileset block location. (unused)
 412  *      rootdir=        Override the root directory location. (unused)
 413  *              WARNING: overriding the rootdir to a non-directory may
 414  *              yield highly unpredictable results.
 415  *
 416  * PRE-CONDITIONS
 417  *      options         Pointer to mount options string.
 418  *      uopts           Pointer to mount options variable.
 419  *
 420  * POST-CONDITIONS
 421  *      <return>        1       Mount options parsed okay.
 422  *      <return>        0       Error parsing mount options.
 423  *
 424  * HISTORY
 425  *      July 1, 1997 - Andrew E. Mileski
 426  *      Written, tested, and released.
 427  */
 428
 429 enum {
 430         Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
 431         Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
 432         Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
 433         Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
 434         Opt_rootdir, Opt_utf8, Opt_iocharset,
 435         Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
 436         Opt_fmode, Opt_dmode
 437 };
 438
 439 static const match_table_t tokens = {
 440         {Opt_novrs,     "novrs"},
 441         {Opt_nostrict,  "nostrict"},
 442         {Opt_bs,        "bs=%u"},
 443         {Opt_unhide,    "unhide"},
 444         {Opt_undelete,  "undelete"},
 445         {Opt_noadinicb, "noadinicb"},
 446         {Opt_adinicb,   "adinicb"},
 447         {Opt_shortad,   "shortad"},
 448         {Opt_longad,    "longad"},
 449         {Opt_uforget,   "uid=forget"},
 450         {Opt_uignore,   "uid=ignore"},
 451         {Opt_gforget,   "gid=forget"},
 452         {Opt_gignore,   "gid=ignore"},
 453         {Opt_gid,       "gid=%u"},
 454         {Opt_uid,       "uid=%u"},
 455         {Opt_umask,     "umask=%o"},
 456         {Opt_session,   "session=%u"},
 457         {Opt_lastblock, "lastblock=%u"},
 458         {Opt_anchor,    "anchor=%u"},
 459         {Opt_volume,    "volume=%u"},
 460         {Opt_partition, "partition=%u"},
 461         {Opt_fileset,   "fileset=%u"},
 462         {Opt_rootdir,   "rootdir=%u"},
 463         {Opt_utf8,      "utf8"},
 464         {Opt_iocharset, "iocharset=%s"},
 465         {Opt_fmode,     "mode=%o"},
 466         {Opt_dmode,     "dmode=%o"},
 467         {Opt_err,       NULL}
 468 };
 469
 470 static int udf_parse_options(char *options, struct udf_options *uopt,
 471                              bool remount)
 472 {
 473         char *p;
 474         int option;
 475
 476         uopt->novrs = 0;
 477         uopt->partition = 0xFFFF;
 478         uopt->session = 0xFFFFFFFF;
 479         uopt->lastblock = 0;
 480         uopt->anchor = 0;
 481         uopt->volume = 0xFFFFFFFF;
 482         uopt->rootdir = 0xFFFFFFFF;
 483         uopt->fileset = 0xFFFFFFFF;
 484         uopt->nls_map = NULL;
 485
 486         if (!options)
 487                 return 1;
 488
 489         while ((p = strsep(&options, ",")) != NULL) {
 490                 substring_t args[MAX_OPT_ARGS];
 491                 int token;
 492                 if (!*p)
 493                         continue;
 494
 495                 token = match_token(p, tokens, args);
 496                 switch (token) {
 497                 case Opt_novrs:
 498                         uopt->novrs = 1;
 499                         break;
 500                 case Opt_bs:
 501                         if (match_int(&args[0], &option))
 502                                 return 0;
 503                         uopt->blocksize = option;
 504                         uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
 505                         break;
 506                 case Opt_unhide:
 507                         uopt->flags |= (1 << UDF_FLAG_UNHIDE);
 508                         break;
 509                 case Opt_undelete:
 510                         uopt->flags |= (1 << UDF_FLAG_UNDELETE);
 511                         break;
 512                 case Opt_noadinicb:
 513                         uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
 514                         break;
 515                 case Opt_adinicb:
 516                         uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
 517                         break;
 518                 case Opt_shortad:
 519                         uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
 520                         break;
 521                 case Opt_longad:
 522                         uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
 523                         break;
 524                 case Opt_gid:
 525                         if (match_int(args, &option))
 526                                 return 0;
 527                         uopt->gid = make_kgid(current_user_ns(), option);
 528                         if (!gid_valid(uopt->gid))
 529                                 return 0;
 530                         uopt->flags |= (1 << UDF_FLAG_GID_SET);
 531                         break;
 532                 case Opt_uid:
 533                         if (match_int(args, &option))
 534                                 return 0;
 535                         uopt->uid = make_kuid(current_user_ns(), option);
 536                         if (!uid_valid(uopt->uid))
 537                                 return 0;
 538                         uopt->flags |= (1 << UDF_FLAG_UID_SET);
 539                         break;
 540                 case Opt_umask:
 541                         if (match_octal(args, &option))
 542                                 return 0;
 543                         uopt->umask = option;
 544                         break;
 545                 case Opt_nostrict:
 546                         uopt->flags &= ~(1 << UDF_FLAG_STRICT);
 547                         break;
 548                 case Opt_session:
 549                         if (match_int(args, &option))
 550                                 return 0;
 551                         uopt->session = option;
 552                         if (!remount)
 553                                 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
 554                         break;
 555                 case Opt_lastblock:
 556                         if (match_int(args, &option))
 557                                 return 0;
 558                         uopt->lastblock = option;
 559                         if (!remount)
 560                                 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
 561                         break;
 562                 case Opt_anchor:
 563                         if (match_int(args, &option))
 564                                 return 0;
 565                         uopt->anchor = option;
 566                         break;
 567                 case Opt_volume:
 568                         if (match_int(args, &option))
 569                                 return 0;
 570                         uopt->volume = option;
 571                         break;
 572                 case Opt_partition:
 573                         if (match_int(args, &option))
 574                                 return 0;
 575                         uopt->partition = option;
 576                         break;
 577                 case Opt_fileset:
 578                         if (match_int(args, &option))
 579                                 return 0;
 580                         uopt->fileset = option;
 581                         break;
 582                 case Opt_rootdir:
 583                         if (match_int(args, &option))
 584                                 return 0;
 585                         uopt->rootdir = option;
 586                         break;
 587                 case Opt_utf8:
 588                         uopt->flags |= (1 << UDF_FLAG_UTF8);
 589                         break;
 590 #ifdef CONFIG_UDF_NLS
 591                 case Opt_iocharset:
 592                         uopt->nls_map = load_nls(args[0].from);
 593                         uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
 594                         break;
 595 #endif
 596                 case Opt_uignore:
 597                         uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
 598                         break;
 599                 case Opt_uforget:
 600                         uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
 601                         break;
 602                 case Opt_gignore:
 603                         uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
 604                         break;
 605                 case Opt_gforget:
 606                         uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
 607                         break;
 608                 case Opt_fmode:
 609                         if (match_octal(args, &option))
 610                                 return 0;
 611                         uopt->fmode = option & 0777;
 612                         break;
 613                 case Opt_dmode:
 614                         if (match_octal(args, &option))
 615                                 return 0;
 616                         uopt->dmode = option & 0777;
 617                         break;
 618                 default:
 619                         pr_err("bad mount option \"%s\" or missing value\n", p);
 620                         return 0;
 621                 }
 622         }
 623         return 1;
 624 }
 625
 626 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
 627 {
 628         struct udf_options uopt;
 629         struct udf_sb_info *sbi = UDF_SB(sb);
 630         int error = 0;
 631
 632         uopt.flags = sbi->s_flags;
 633         uopt.uid   = sbi->s_uid;
 634         uopt.gid   = sbi->s_gid;
 635         uopt.umask = sbi->s_umask;
 636         uopt.fmode = sbi->s_fmode;
 637         uopt.dmode = sbi->s_dmode;
 638
 639         if (!udf_parse_options(options, &uopt, true))
 640                 return -EINVAL;
 641
 642         write_lock(&sbi->s_cred_lock);
 643         sbi->s_flags = uopt.flags;
 644         sbi->s_uid   = uopt.uid;
 645         sbi->s_gid   = uopt.gid;
 646         sbi->s_umask = uopt.umask;
 647         sbi->s_fmode = uopt.fmode;
 648         sbi->s_dmode = uopt.dmode;
 649         write_unlock(&sbi->s_cred_lock);
 650
 651         if (sbi->s_lvid_bh) {
 652                 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
 653                 if (write_rev > UDF_MAX_WRITE_VERSION)
 654                         *flags |= MS_RDONLY;
 655         }
 656
 657         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
 658                 goto out_unlock;
 659
 660         if (*flags & MS_RDONLY)
 661                 udf_close_lvid(sb);
 662         else
 663                 udf_open_lvid(sb);
 664
 665 out_unlock:
 666         return error;
 667 }
 668
 669 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
 670 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
 671 static loff_t udf_check_vsd(struct super_block *sb)
 672 {
 673         struct volStructDesc *vsd = NULL;
 674         loff_t sector = 32768;
 675         int sectorsize;
 676         struct buffer_head *bh = NULL;
 677         int nsr02 = 0;
 678         int nsr03 = 0;
 679         struct udf_sb_info *sbi;
 680
 681         sbi = UDF_SB(sb);
 682         if (sb->s_blocksize < sizeof(struct volStructDesc))
 683                 sectorsize = sizeof(struct volStructDesc);
 684         else
 685                 sectorsize = sb->s_blocksize;
 686
 687         sector += (sbi->s_session << sb->s_blocksize_bits);
 688
 689         udf_debug("Starting at sector %u (%ld byte sectors)\n",
 690                   (unsigned int)(sector >> sb->s_blocksize_bits),
 691                   sb->s_blocksize);
 692         /* Process the sequence (if applicable) */
 693         for (; !nsr02 && !nsr03; sector += sectorsize) {
 694                 /* Read a block */
 695                 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
 696                 if (!bh)
 697                         break;
 698
 699                 /* Look for ISO  descriptors */
 700                 vsd = (struct volStructDesc *)(bh->b_data +
 701                                               (sector & (sb->s_blocksize - 1)));
 702
 703                 if (vsd->stdIdent[0] == 0) {
 704                         brelse(bh);
 705                         break;
 706                 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
 707                                     VSD_STD_ID_LEN)) {
 708                         switch (vsd->structType) {
 709                         case 0:
 710                                 udf_debug("ISO9660 Boot Record found\n");
 711                                 break;
 712                         case 1:
 713                                 udf_debug("ISO9660 Primary Volume Descriptor found\n");
 714                                 break;
 715                         case 2:
 716                                 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
 717                                 break;
 718                         case 3:
 719                                 udf_debug("ISO9660 Volume Partition Descriptor found\n");
 720                                 break;
 721                         case 255:
 722                                 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
 723                                 break;
 724                         default:
 725                                 udf_debug("ISO9660 VRS (%u) found\n",
 726                                           vsd->structType);
 727                                 break;
 728                         }
 729                 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
 730                                     VSD_STD_ID_LEN))
 731                         ; /* nothing */
 732                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
 733                                     VSD_STD_ID_LEN)) {
 734                         brelse(bh);
 735                         break;
 736                 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
 737                                     VSD_STD_ID_LEN))
 738                         nsr02 = sector;
 739                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
 740                                     VSD_STD_ID_LEN))
 741                         nsr03 = sector;
 742                 brelse(bh);
 743         }
 744
 745         if (nsr03)
 746                 return nsr03;
 747         else if (nsr02)
 748                 return nsr02;
 749         else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
 750                 return -1;
 751         else
 752                 return 0;
 753 }
 754
 755 static int udf_find_fileset(struct super_block *sb,
 756                             struct kernel_lb_addr *fileset,
 757                             struct kernel_lb_addr *root)
 758 {
 759         struct buffer_head *bh = NULL;
 760         long lastblock;
 761         uint16_t ident;
 762         struct udf_sb_info *sbi;
 763
 764         if (fileset->logicalBlockNum != 0xFFFFFFFF ||
 765             fileset->partitionReferenceNum != 0xFFFF) {
 766                 bh = udf_read_ptagged(sb, fileset, 0, &ident);
 767
 768                 if (!bh) {
 769                         return 1;
 770                 } else if (ident != TAG_IDENT_FSD) {
 771                         brelse(bh);
 772                         return 1;
 773                 }
 774
 775         }
 776
 777         sbi = UDF_SB(sb);
 778         if (!bh) {
 779                 /* Search backwards through the partitions */
 780                 struct kernel_lb_addr newfileset;
 781
 782 /* --> cvg: FIXME - is it reasonable? */
 783                 return 1;
 784
 785                 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
 786                      (newfileset.partitionReferenceNum != 0xFFFF &&
 787                       fileset->logicalBlockNum == 0xFFFFFFFF &&
 788                       fileset->partitionReferenceNum == 0xFFFF);
 789                      newfileset.partitionReferenceNum--) {
 790                         lastblock = sbi->s_partmaps
 791                                         [newfileset.partitionReferenceNum]
 792                                                 .s_partition_len;
 793                         newfileset.logicalBlockNum = 0;
 794
 795                         do {
 796                                 bh = udf_read_ptagged(sb, &newfileset, 0,
 797                                                       &ident);
 798                                 if (!bh) {
 799                                         newfileset.logicalBlockNum++;
 800                                         continue;
 801                                 }
 802
 803                                 switch (ident) {
 804                                 case TAG_IDENT_SBD:
 805                                 {
 806                                         struct spaceBitmapDesc *sp;
 807                                         sp = (struct spaceBitmapDesc *)
 808                                                                 bh->b_data;
 809                                         newfileset.logicalBlockNum += 1 +
 810                                                 ((le32_to_cpu(sp->numOfBytes) +
 811                                                   sizeof(struct spaceBitmapDesc)
 812                                                   - 1) >> sb->s_blocksize_bits);
 813                                         brelse(bh);
 814                                         break;
 815                                 }
 816                                 case TAG_IDENT_FSD:
 817                                         *fileset = newfileset;
 818                                         break;
 819                                 default:
 820                                         newfileset.logicalBlockNum++;
 821                                         brelse(bh);
 822                                         bh = NULL;
 823                                         break;
 824                                 }
 825                         } while (newfileset.logicalBlockNum < lastblock &&
 826                                  fileset->logicalBlockNum == 0xFFFFFFFF &&
 827                                  fileset->partitionReferenceNum == 0xFFFF);
 828                 }
 829         }
 830
 831         if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
 832              fileset->partitionReferenceNum != 0xFFFF) && bh) {
 833                 udf_debug("Fileset at block=%d, partition=%d\n",
 834                           fileset->logicalBlockNum,
 835                           fileset->partitionReferenceNum);
 836
 837                 sbi->s_partition = fileset->partitionReferenceNum;
 838                 udf_load_fileset(sb, bh, root);
 839                 brelse(bh);
 840                 return 0;
 841         }
 842         return 1;
 843 }
 844
 845 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
 846 {
 847         struct primaryVolDesc *pvoldesc;
 848         struct ustr *instr, *outstr;
 849         struct buffer_head *bh;
 850         uint16_t ident;
 851         int ret = 1;
 852
 853         instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
 854         if (!instr)
 855                 return 1;
 856
 857         outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
 858         if (!outstr)
 859                 goto out1;
 860
 861         bh = udf_read_tagged(sb, block, block, &ident);
 862         if (!bh)
 863                 goto out2;
 864
 865         BUG_ON(ident != TAG_IDENT_PVD);
 866
 867         pvoldesc = (struct primaryVolDesc *)bh->b_data;
 868
 869         if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
 870                               pvoldesc->recordingDateAndTime)) {
 871 #ifdef UDFFS_DEBUG
 872                 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
 873                 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
 874                           le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
 875                           ts->minute, le16_to_cpu(ts->typeAndTimezone));
 876 #endif
 877         }
 878
 879         if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
 880                 if (udf_CS0toUTF8(outstr, instr)) {
 881                         strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
 882                                 outstr->u_len > 31 ? 31 : outstr->u_len);
 883                         udf_debug("volIdent[] = '%s'\n",
 884                                   UDF_SB(sb)->s_volume_ident);
 885                 }
 886
 887         if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
 888                 if (udf_CS0toUTF8(outstr, instr))
 889                         udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
 890
 891         brelse(bh);
 892         ret = 0;
 893 out2:
 894         kfree(outstr);
 895 out1:
 896         kfree(instr);
 897         return ret;
 898 }
 899
 900 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
 901                                         u32 meta_file_loc, u32 partition_num)
 902 {
 903         struct kernel_lb_addr addr;
 904         struct inode *metadata_fe;
 905
 906         addr.logicalBlockNum = meta_file_loc;
 907         addr.partitionReferenceNum = partition_num;
 908
 909         metadata_fe = udf_iget(sb, &addr);
 910
 911         if (metadata_fe == NULL)
 912                 udf_warn(sb, "metadata inode efe not found\n");
 913         else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
 914                 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
 915                 iput(metadata_fe);
 916                 metadata_fe = NULL;
 917         }
 918
 919         return metadata_fe;
 920 }
 921
 922 static int udf_load_metadata_files(struct super_block *sb, int partition)
 923 {
 924         struct udf_sb_info *sbi = UDF_SB(sb);
 925         struct udf_part_map *map;
 926         struct udf_meta_data *mdata;
 927         struct kernel_lb_addr addr;
 928
 929         map = &sbi->s_partmaps[partition];
 930         mdata = &map->s_type_specific.s_metadata;
 931
 932         /* metadata address */
 933         udf_debug("Metadata file location: block = %d part = %d\n",
 934                   mdata->s_meta_file_loc, map->s_partition_num);
 935
 936         mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
 937                 mdata->s_meta_file_loc, map->s_partition_num);
 938
 939         if (mdata->s_metadata_fe == NULL) {
 940                 /* mirror file entry */
 941                 udf_debug("Mirror metadata file location: block = %d part = %d\n",
 942                           mdata->s_mirror_file_loc, map->s_partition_num);
 943
 944                 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
 945                         mdata->s_mirror_file_loc, map->s_partition_num);
 946
 947                 if (mdata->s_mirror_fe == NULL) {
 948                         udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
 949                         goto error_exit;
 950                 }
 951         }
 952
 953         /*
 954          * bitmap file entry
 955          * Note:
 956          * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
 957         */
 958         if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
 959                 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
 960                 addr.partitionReferenceNum = map->s_partition_num;
 961
 962                 udf_debug("Bitmap file location: block = %d part = %d\n",
 963                           addr.logicalBlockNum, addr.partitionReferenceNum);
 964
 965                 mdata->s_bitmap_fe = udf_iget(sb, &addr);
 966
 967                 if (mdata->s_bitmap_fe == NULL) {
 968                         if (sb->s_flags & MS_RDONLY)
 969                                 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
 970                         else {
 971                                 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
 972                                 goto error_exit;
 973                         }
 974                 }
 975         }
 976
 977         udf_debug("udf_load_metadata_files Ok\n");
 978
 979         return 0;
 980
 981 error_exit:
 982         return 1;
 983 }
 984
 985 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
 986                              struct kernel_lb_addr *root)
 987 {
 988         struct fileSetDesc *fset;
 989
 990         fset = (struct fileSetDesc *)bh->b_data;
 991
 992         *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
 993
 994         UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
 995
 996         udf_debug("Rootdir at block=%d, partition=%d\n",
 997                   root->logicalBlockNum, root->partitionReferenceNum);
 998 }
 999
1000 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1001 {
1002         struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1003         return DIV_ROUND_UP(map->s_partition_len +
1004                             (sizeof(struct spaceBitmapDesc) << 3),
1005                             sb->s_blocksize * 8);
1006 }
1007
1008 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1009 {
1010         struct udf_bitmap *bitmap;
1011         int nr_groups;
1012         int size;
1013
1014         nr_groups = udf_compute_nr_groups(sb, index);
1015         size = sizeof(struct udf_bitmap) +
1016                 (sizeof(struct buffer_head *) * nr_groups);
1017
1018         if (size <= PAGE_SIZE)
1019                 bitmap = kzalloc(size, GFP_KERNEL);
1020         else
1021                 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
1022
1023         if (bitmap == NULL)
1024                 return NULL;
1025
1026         bitmap->s_nr_groups = nr_groups;
1027         return bitmap;
1028 }
1029
1030 static int udf_fill_partdesc_info(struct super_block *sb,
1031                 struct partitionDesc *p, int p_index)
1032 {
1033         struct udf_part_map *map;
1034         struct udf_sb_info *sbi = UDF_SB(sb);
1035         struct partitionHeaderDesc *phd;
1036
1037         map = &sbi->s_partmaps[p_index];
1038
1039         map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1040         map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1041
1042         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1043                 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1044         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1045                 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1046         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1047                 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1048         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1049                 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1050
1051         udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1052                   p_index, map->s_partition_type,
1053                   map->s_partition_root, map->s_partition_len);
1054
1055         if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1056             strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1057                 return 0;
1058
1059         phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1060         if (phd->unallocSpaceTable.extLength) {
1061                 struct kernel_lb_addr loc = {
1062                         .logicalBlockNum = le32_to_cpu(
1063                                 phd->unallocSpaceTable.extPosition),
1064                         .partitionReferenceNum = p_index,
1065                 };
1066
1067                 map->s_uspace.s_table = udf_iget(sb, &loc);
1068                 if (!map->s_uspace.s_table) {
1069                         udf_debug("cannot load unallocSpaceTable (part %d)\n",
1070                                   p_index);
1071                         return 1;
1072                 }
1073                 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1074                 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1075                           p_index, map->s_uspace.s_table->i_ino);
1076         }
1077
1078         if (phd->unallocSpaceBitmap.extLength) {
1079                 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1080                 if (!bitmap)
1081                         return 1;
1082                 map->s_uspace.s_bitmap = bitmap;
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_extPosition = le32_to_cpu(
1118                                 phd->freedSpaceBitmap.extPosition);
1119                 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1120                 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1121                           p_index, bitmap->s_extPosition);
1122         }
1123         return 0;
1124 }
1125
1126 static void udf_find_vat_block(struct super_block *sb, int p_index,
1127                                int type1_index, sector_t start_block)
1128 {
1129         struct udf_sb_info *sbi = UDF_SB(sb);
1130         struct udf_part_map *map = &sbi->s_partmaps[p_index];
1131         sector_t vat_block;
1132         struct kernel_lb_addr ino;
1133
1134         /*
1135          * VAT file entry is in the last recorded block. Some broken disks have
1136          * it a few blocks before so try a bit harder...
1137          */
1138         ino.partitionReferenceNum = type1_index;
1139         for (vat_block = start_block;
1140              vat_block >= map->s_partition_root &&
1141              vat_block >= start_block - 3 &&
1142              !sbi->s_vat_inode; vat_block--) {
1143                 ino.logicalBlockNum = vat_block - map->s_partition_root;
1144                 sbi->s_vat_inode = udf_iget(sb, &ino);
1145         }
1146 }
1147
1148 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1149 {
1150         struct udf_sb_info *sbi = UDF_SB(sb);
1151         struct udf_part_map *map = &sbi->s_partmaps[p_index];
1152         struct buffer_head *bh = NULL;
1153         struct udf_inode_info *vati;
1154         uint32_t pos;
1155         struct virtualAllocationTable20 *vat20;
1156         sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1157
1158         udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1159         if (!sbi->s_vat_inode &&
1160             sbi->s_last_block != blocks - 1) {
1161                 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1162                           (unsigned long)sbi->s_last_block,
1163                           (unsigned long)blocks - 1);
1164                 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1165         }
1166         if (!sbi->s_vat_inode)
1167                 return 1;
1168
1169         if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1170                 map->s_type_specific.s_virtual.s_start_offset = 0;
1171                 map->s_type_specific.s_virtual.s_num_entries =
1172                         (sbi->s_vat_inode->i_size - 36) >> 2;
1173         } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1174                 vati = UDF_I(sbi->s_vat_inode);
1175                 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1176                         pos = udf_block_map(sbi->s_vat_inode, 0);
1177                         bh = sb_bread(sb, pos);
1178                         if (!bh)
1179                                 return 1;
1180                         vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1181                 } else {
1182                         vat20 = (struct virtualAllocationTable20 *)
1183                                                         vati->i_ext.i_data;
1184                 }
1185
1186                 map->s_type_specific.s_virtual.s_start_offset =
1187                         le16_to_cpu(vat20->lengthHeader);
1188                 map->s_type_specific.s_virtual.s_num_entries =
1189                         (sbi->s_vat_inode->i_size -
1190                                 map->s_type_specific.s_virtual.
1191                                         s_start_offset) >> 2;
1192                 brelse(bh);
1193         }
1194         return 0;
1195 }
1196
1197 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1198 {
1199         struct buffer_head *bh;
1200         struct partitionDesc *p;
1201         struct udf_part_map *map;
1202         struct udf_sb_info *sbi = UDF_SB(sb);
1203         int i, type1_idx;
1204         uint16_t partitionNumber;
1205         uint16_t ident;
1206         int ret = 0;
1207
1208         bh = udf_read_tagged(sb, block, block, &ident);
1209         if (!bh)
1210                 return 1;
1211         if (ident != TAG_IDENT_PD)
1212                 goto out_bh;
1213
1214         p = (struct partitionDesc *)bh->b_data;
1215         partitionNumber = le16_to_cpu(p->partitionNumber);
1216
1217         /* First scan for TYPE1, SPARABLE and METADATA partitions */
1218         for (i = 0; i < sbi->s_partitions; i++) {
1219                 map = &sbi->s_partmaps[i];
1220                 udf_debug("Searching map: (%d == %d)\n",
1221                           map->s_partition_num, partitionNumber);
1222                 if (map->s_partition_num == partitionNumber &&
1223                     (map->s_partition_type == UDF_TYPE1_MAP15 ||
1224                      map->s_partition_type == UDF_SPARABLE_MAP15))
1225                         break;
1226         }
1227
1228         if (i >= sbi->s_partitions) {
1229                 udf_debug("Partition (%d) not found in partition map\n",
1230                           partitionNumber);
1231                 goto out_bh;
1232         }
1233
1234         ret = udf_fill_partdesc_info(sb, p, i);
1235
1236         /*
1237          * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1238          * PHYSICAL partitions are already set up
1239          */
1240         type1_idx = i;
1241         for (i = 0; i < sbi->s_partitions; i++) {
1242                 map = &sbi->s_partmaps[i];
1243
1244                 if (map->s_partition_num == partitionNumber &&
1245                     (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1246                      map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1247                      map->s_partition_type == UDF_METADATA_MAP25))
1248                         break;
1249         }
1250
1251         if (i >= sbi->s_partitions)
1252                 goto out_bh;
1253
1254         ret = udf_fill_partdesc_info(sb, p, i);
1255         if (ret)
1256                 goto out_bh;
1257
1258         if (map->s_partition_type == UDF_METADATA_MAP25) {
1259                 ret = udf_load_metadata_files(sb, i);
1260                 if (ret) {
1261                         udf_err(sb, "error loading MetaData partition map %d\n",
1262                                 i);
1263                         goto out_bh;
1264                 }
1265         } else {
1266                 ret = udf_load_vat(sb, i, type1_idx);
1267                 if (ret)
1268                         goto out_bh;
1269                 /*
1270                  * Mark filesystem read-only if we have a partition with
1271                  * virtual map since we don't handle writing to it (we
1272                  * overwrite blocks instead of relocating them).
1273                  */
1274                 sb->s_flags |= MS_RDONLY;
1275                 pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n");
1276         }
1277 out_bh:
1278         /* In case loading failed, we handle cleanup in udf_fill_super */
1279         brelse(bh);
1280         return ret;
1281 }
1282
1283 static int udf_load_sparable_map(struct super_block *sb,
1284                                  struct udf_part_map *map,
1285                                  struct sparablePartitionMap *spm)
1286 {
1287         uint32_t loc;
1288         uint16_t ident;
1289         struct sparingTable *st;
1290         struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1291         int i;
1292         struct buffer_head *bh;
1293
1294         map->s_partition_type = UDF_SPARABLE_MAP15;
1295         sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1296         if (!is_power_of_2(sdata->s_packet_len)) {
1297                 udf_err(sb, "error loading logical volume descriptor: "
1298                         "Invalid packet length %u\n",
1299                         (unsigned)sdata->s_packet_len);
1300                 return -EIO;
1301         }
1302         if (spm->numSparingTables > 4) {
1303                 udf_err(sb, "error loading logical volume descriptor: "
1304                         "Too many sparing tables (%d)\n",
1305                         (int)spm->numSparingTables);
1306                 return -EIO;
1307         }
1308
1309         for (i = 0; i < spm->numSparingTables; i++) {
1310                 loc = le32_to_cpu(spm->locSparingTable[i]);
1311                 bh = udf_read_tagged(sb, loc, loc, &ident);
1312                 if (!bh)
1313                         continue;
1314
1315                 st = (struct sparingTable *)bh->b_data;
1316                 if (ident != 0 ||
1317                     strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1318                             strlen(UDF_ID_SPARING)) ||
1319                     sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1320                                                         sb->s_blocksize) {
1321                         brelse(bh);
1322                         continue;
1323                 }
1324
1325                 sdata->s_spar_map[i] = bh;
1326         }
1327         map->s_partition_func = udf_get_pblock_spar15;
1328         return 0;
1329 }
1330
1331 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1332                                struct kernel_lb_addr *fileset)
1333 {
1334         struct logicalVolDesc *lvd;
1335         int i, offset;
1336         uint8_t type;
1337         struct udf_sb_info *sbi = UDF_SB(sb);
1338         struct genericPartitionMap *gpm;
1339         uint16_t ident;
1340         struct buffer_head *bh;
1341         unsigned int table_len;
1342         int ret = 0;
1343
1344         bh = udf_read_tagged(sb, block, block, &ident);
1345         if (!bh)
1346                 return 1;
1347         BUG_ON(ident != TAG_IDENT_LVD);
1348         lvd = (struct logicalVolDesc *)bh->b_data;
1349         table_len = le32_to_cpu(lvd->mapTableLength);
1350         if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1351                 udf_err(sb, "error loading logical volume descriptor: "
1352                         "Partition table too long (%u > %lu)\n", table_len,
1353                         sb->s_blocksize - sizeof(*lvd));
1354                 ret = 1;
1355                 goto out_bh;
1356         }
1357
1358         ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1359         if (ret)
1360                 goto out_bh;
1361
1362         for (i = 0, offset = 0;
1363              i < sbi->s_partitions && offset < table_len;
1364              i++, offset += gpm->partitionMapLength) {
1365                 struct udf_part_map *map = &sbi->s_partmaps[i];
1366                 gpm = (struct genericPartitionMap *)
1367                                 &(lvd->partitionMaps[offset]);
1368                 type = gpm->partitionMapType;
1369                 if (type == 1) {
1370                         struct genericPartitionMap1 *gpm1 =
1371                                 (struct genericPartitionMap1 *)gpm;
1372                         map->s_partition_type = UDF_TYPE1_MAP15;
1373                         map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1374                         map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1375                         map->s_partition_func = NULL;
1376                 } else if (type == 2) {
1377                         struct udfPartitionMap2 *upm2 =
1378                                                 (struct udfPartitionMap2 *)gpm;
1379                         if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1380                                                 strlen(UDF_ID_VIRTUAL))) {
1381                                 u16 suf =
1382                                         le16_to_cpu(((__le16 *)upm2->partIdent.
1383                                                         identSuffix)[0]);
1384                                 if (suf < 0x0200) {
1385                                         map->s_partition_type =
1386                                                         UDF_VIRTUAL_MAP15;
1387                                         map->s_partition_func =
1388                                                         udf_get_pblock_virt15;
1389                                 } else {
1390                                         map->s_partition_type =
1391                                                         UDF_VIRTUAL_MAP20;
1392                                         map->s_partition_func =
1393                                                         udf_get_pblock_virt20;
1394                                 }
1395                         } else if (!strncmp(upm2->partIdent.ident,
1396                                                 UDF_ID_SPARABLE,
1397                                                 strlen(UDF_ID_SPARABLE))) {
1398                                 if (udf_load_sparable_map(sb, map,
1399                                     (struct sparablePartitionMap *)gpm) < 0) {
1400                                         ret = 1;
1401                                         goto out_bh;
1402                                 }
1403                         } else if (!strncmp(upm2->partIdent.ident,
1404                                                 UDF_ID_METADATA,
1405                                                 strlen(UDF_ID_METADATA))) {
1406                                 struct udf_meta_data *mdata =
1407                                         &map->s_type_specific.s_metadata;
1408                                 struct metadataPartitionMap *mdm =
1409                                                 (struct metadataPartitionMap *)
1410                                                 &(lvd->partitionMaps[offset]);
1411                                 udf_debug("Parsing Logical vol part %d type %d  id=%s\n",
1412                                           i, type, UDF_ID_METADATA);
1413
1414                                 map->s_partition_type = UDF_METADATA_MAP25;
1415                                 map->s_partition_func = udf_get_pblock_meta25;
1416
1417                                 mdata->s_meta_file_loc   =
1418                                         le32_to_cpu(mdm->metadataFileLoc);
1419                                 mdata->s_mirror_file_loc =
1420                                         le32_to_cpu(mdm->metadataMirrorFileLoc);
1421                                 mdata->s_bitmap_file_loc =
1422                                         le32_to_cpu(mdm->metadataBitmapFileLoc);
1423                                 mdata->s_alloc_unit_size =
1424                                         le32_to_cpu(mdm->allocUnitSize);
1425                                 mdata->s_align_unit_size =
1426                                         le16_to_cpu(mdm->alignUnitSize);
1427                                 if (mdm->flags & 0x01)
1428                                         mdata->s_flags |= MF_DUPLICATE_MD;
1429
1430                                 udf_debug("Metadata Ident suffix=0x%x\n",
1431                                           le16_to_cpu(*(__le16 *)
1432                                                       mdm->partIdent.identSuffix));
1433                                 udf_debug("Metadata part num=%d\n",
1434                                           le16_to_cpu(mdm->partitionNum));
1435                                 udf_debug("Metadata part alloc unit size=%d\n",
1436                                           le32_to_cpu(mdm->allocUnitSize));
1437                                 udf_debug("Metadata file loc=%d\n",
1438                                           le32_to_cpu(mdm->metadataFileLoc));
1439                                 udf_debug("Mirror file loc=%d\n",
1440                                           le32_to_cpu(mdm->metadataMirrorFileLoc));
1441                                 udf_debug("Bitmap file loc=%d\n",
1442                                           le32_to_cpu(mdm->metadataBitmapFileLoc));
1443                                 udf_debug("Flags: %d %d\n",
1444                                           mdata->s_flags, mdm->flags);
1445                         } else {
1446                                 udf_debug("Unknown ident: %s\n",
1447                                           upm2->partIdent.ident);
1448                                 continue;
1449                         }
1450                         map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1451                         map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1452                 }
1453                 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1454                           i, map->s_partition_num, type, map->s_volumeseqnum);
1455         }
1456
1457         if (fileset) {
1458                 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1459
1460                 *fileset = lelb_to_cpu(la->extLocation);
1461                 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1462                           fileset->logicalBlockNum,
1463                           fileset->partitionReferenceNum);
1464         }
1465         if (lvd->integritySeqExt.extLength)
1466                 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1467
1468 out_bh:
1469         brelse(bh);
1470         return ret;
1471 }
1472
1473 /*
1474  * udf_load_logicalvolint
1475  *
1476  */
1477 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1478 {
1479         struct buffer_head *bh = NULL;
1480         uint16_t ident;
1481         struct udf_sb_info *sbi = UDF_SB(sb);
1482         struct logicalVolIntegrityDesc *lvid;
1483
1484         while (loc.extLength > 0 &&
1485                (bh = udf_read_tagged(sb, loc.extLocation,
1486                                      loc.extLocation, &ident)) &&
1487                ident == TAG_IDENT_LVID) {
1488                 sbi->s_lvid_bh = bh;
1489                 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1490
1491                 if (lvid->nextIntegrityExt.extLength)
1492                         udf_load_logicalvolint(sb,
1493                                 leea_to_cpu(lvid->nextIntegrityExt));
1494
1495                 if (sbi->s_lvid_bh != bh)
1496                         brelse(bh);
1497                 loc.extLength -= sb->s_blocksize;
1498                 loc.extLocation++;
1499         }
1500         if (sbi->s_lvid_bh != bh)
1501                 brelse(bh);
1502 }
1503
1504 /*
1505  * udf_process_sequence
1506  *
1507  * PURPOSE
1508  *      Process a main/reserve volume descriptor sequence.
1509  *
1510  * PRE-CONDITIONS
1511  *      sb                      Pointer to _locked_ superblock.
1512  *      block                   First block of first extent of the sequence.
1513  *      lastblock               Lastblock of first extent of the sequence.
1514  *
1515  * HISTORY
1516  *      July 1, 1997 - Andrew E. Mileski
1517  *      Written, tested, and released.
1518  */
1519 static noinline int udf_process_sequence(struct super_block *sb, long block,
1520                                 long lastblock, struct kernel_lb_addr *fileset)
1521 {
1522         struct buffer_head *bh = NULL;
1523         struct udf_vds_record vds[VDS_POS_LENGTH];
1524         struct udf_vds_record *curr;
1525         struct generic_desc *gd;
1526         struct volDescPtr *vdp;
1527         int done = 0;
1528         uint32_t vdsn;
1529         uint16_t ident;
1530         long next_s = 0, next_e = 0;
1531
1532         memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1533
1534         /*
1535          * Read the main descriptor sequence and find which descriptors
1536          * are in it.
1537          */
1538         for (; (!done && block <= lastblock); block++) {
1539
1540                 bh = udf_read_tagged(sb, block, block, &ident);
1541                 if (!bh) {
1542                         udf_err(sb,
1543                                 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1544                                 (unsigned long long)block);
1545                         return 1;
1546                 }
1547
1548                 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1549                 gd = (struct generic_desc *)bh->b_data;
1550                 vdsn = le32_to_cpu(gd->volDescSeqNum);
1551                 switch (ident) {
1552                 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1553                         curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1554                         if (vdsn >= curr->volDescSeqNum) {
1555                                 curr->volDescSeqNum = vdsn;
1556                                 curr->block = block;
1557                         }
1558                         break;
1559                 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1560                         curr = &vds[VDS_POS_VOL_DESC_PTR];
1561                         if (vdsn >= curr->volDescSeqNum) {
1562                                 curr->volDescSeqNum = vdsn;
1563                                 curr->block = block;
1564
1565                                 vdp = (struct volDescPtr *)bh->b_data;
1566                                 next_s = le32_to_cpu(
1567                                         vdp->nextVolDescSeqExt.extLocation);
1568                                 next_e = le32_to_cpu(
1569                                         vdp->nextVolDescSeqExt.extLength);
1570                                 next_e = next_e >> sb->s_blocksize_bits;
1571                                 next_e += next_s;
1572                         }
1573                         break;
1574                 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1575                         curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1576                         if (vdsn >= curr->volDescSeqNum) {
1577                                 curr->volDescSeqNum = vdsn;
1578                                 curr->block = block;
1579                         }
1580                         break;
1581                 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1582                         curr = &vds[VDS_POS_PARTITION_DESC];
1583                         if (!curr->block)
1584                                 curr->block = block;
1585                         break;
1586                 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1587                         curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1588                         if (vdsn >= curr->volDescSeqNum) {
1589                                 curr->volDescSeqNum = vdsn;
1590                                 curr->block = block;
1591                         }
1592                         break;
1593                 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1594                         curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1595                         if (vdsn >= curr->volDescSeqNum) {
1596                                 curr->volDescSeqNum = vdsn;
1597                                 curr->block = block;
1598                         }
1599                         break;
1600                 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1601                         vds[VDS_POS_TERMINATING_DESC].block = block;
1602                         if (next_e) {
1603                                 block = next_s;
1604                                 lastblock = next_e;
1605                                 next_s = next_e = 0;
1606                         } else
1607                                 done = 1;
1608                         break;
1609                 }
1610                 brelse(bh);
1611         }
1612         /*
1613          * Now read interesting descriptors again and process them
1614          * in a suitable order
1615          */
1616         if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1617                 udf_err(sb, "Primary Volume Descriptor not found!\n");
1618                 return 1;
1619         }
1620         if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1621                 return 1;
1622
1623         if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1624             vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1625                 return 1;
1626
1627         if (vds[VDS_POS_PARTITION_DESC].block) {
1628                 /*
1629                  * We rescan the whole descriptor sequence to find
1630                  * partition descriptor blocks and process them.
1631                  */
1632                 for (block = vds[VDS_POS_PARTITION_DESC].block;
1633                      block < vds[VDS_POS_TERMINATING_DESC].block;
1634                      block++)
1635                         if (udf_load_partdesc(sb, block))
1636                                 return 1;
1637         }
1638
1639         return 0;
1640 }
1641
1642 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1643                              struct kernel_lb_addr *fileset)
1644 {
1645         struct anchorVolDescPtr *anchor;
1646         long main_s, main_e, reserve_s, reserve_e;
1647
1648         anchor = (struct anchorVolDescPtr *)bh->b_data;
1649
1650         /* Locate the main sequence */
1651         main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1652         main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1653         main_e = main_e >> sb->s_blocksize_bits;
1654         main_e += main_s;
1655
1656         /* Locate the reserve sequence */
1657         reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1658         reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1659         reserve_e = reserve_e >> sb->s_blocksize_bits;
1660         reserve_e += reserve_s;
1661
1662         /* Process the main & reserve sequences */
1663         /* responsible for finding the PartitionDesc(s) */
1664         if (!udf_process_sequence(sb, main_s, main_e, fileset))
1665                 return 1;
1666         udf_sb_free_partitions(sb);
1667         if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset))
1668                 return 1;
1669         udf_sb_free_partitions(sb);
1670         return 0;
1671 }
1672
1673 /*
1674  * Check whether there is an anchor block in the given block and
1675  * load Volume Descriptor Sequence if so.
1676  */
1677 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1678                                   struct kernel_lb_addr *fileset)
1679 {
1680         struct buffer_head *bh;
1681         uint16_t ident;
1682         int ret;
1683
1684         if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1685             udf_fixed_to_variable(block) >=
1686             sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1687                 return 0;
1688
1689         bh = udf_read_tagged(sb, block, block, &ident);
1690         if (!bh)
1691                 return 0;
1692         if (ident != TAG_IDENT_AVDP) {
1693                 brelse(bh);
1694                 return 0;
1695         }
1696         ret = udf_load_sequence(sb, bh, fileset);
1697         brelse(bh);
1698         return ret;
1699 }
1700
1701 /* Search for an anchor volume descriptor pointer */
1702 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1703                                  struct kernel_lb_addr *fileset)
1704 {
1705         sector_t last[6];
1706         int i;
1707         struct udf_sb_info *sbi = UDF_SB(sb);
1708         int last_count = 0;
1709
1710         /* First try user provided anchor */
1711         if (sbi->s_anchor) {
1712                 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1713                         return lastblock;
1714         }
1715         /*
1716          * according to spec, anchor is in either:
1717          *     block 256
1718          *     lastblock-256
1719          *     lastblock
1720          *  however, if the disc isn't closed, it could be 512.
1721          */
1722         if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1723                 return lastblock;
1724         /*
1725          * The trouble is which block is the last one. Drives often misreport
1726          * this so we try various possibilities.
1727          */
1728         last[last_count++] = lastblock;
1729         if (lastblock >= 1)
1730                 last[last_count++] = lastblock - 1;
1731         last[last_count++] = lastblock + 1;
1732         if (lastblock >= 2)
1733                 last[last_count++] = lastblock - 2;
1734         if (lastblock >= 150)
1735                 last[last_count++] = lastblock - 150;
1736         if (lastblock >= 152)
1737                 last[last_count++] = lastblock - 152;
1738
1739         for (i = 0; i < last_count; i++) {
1740                 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1741                                 sb->s_blocksize_bits)
1742                         continue;
1743                 if (udf_check_anchor_block(sb, last[i], fileset))
1744                         return last[i];
1745                 if (last[i] < 256)
1746                         continue;
1747                 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1748                         return last[i];
1749         }
1750
1751         /* Finally try block 512 in case media is open */
1752         if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1753                 return last[0];
1754         return 0;
1755 }
1756
1757 /*
1758  * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1759  * area specified by it. The function expects sbi->s_lastblock to be the last
1760  * block on the media.
1761  *
1762  * Return 1 if ok, 0 if not found.
1763  *
1764  */
1765 static int udf_find_anchor(struct super_block *sb,
1766                            struct kernel_lb_addr *fileset)
1767 {
1768         sector_t lastblock;
1769         struct udf_sb_info *sbi = UDF_SB(sb);
1770
1771         lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1772         if (lastblock)
1773                 goto out;
1774
1775         /* No anchor found? Try VARCONV conversion of block numbers */
1776         UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1777         /* Firstly, we try to not convert number of the last block */
1778         lastblock = udf_scan_anchors(sb,
1779                                 udf_variable_to_fixed(sbi->s_last_block),
1780                                 fileset);
1781         if (lastblock)
1782                 goto out;
1783
1784         /* Secondly, we try with converted number of the last block */
1785         lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1786         if (!lastblock) {
1787                 /* VARCONV didn't help. Clear it. */
1788                 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1789                 return 0;
1790         }
1791 out:
1792         sbi->s_last_block = lastblock;
1793         return 1;
1794 }
1795
1796 /*
1797  * Check Volume Structure Descriptor, find Anchor block and load Volume
1798  * Descriptor Sequence
1799  */
1800 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1801                         int silent, struct kernel_lb_addr *fileset)
1802 {
1803         struct udf_sb_info *sbi = UDF_SB(sb);
1804         loff_t nsr_off;
1805
1806         if (!sb_set_blocksize(sb, uopt->blocksize)) {
1807                 if (!silent)
1808                         udf_warn(sb, "Bad block size\n");
1809                 return 0;
1810         }
1811         sbi->s_last_block = uopt->lastblock;
1812         if (!uopt->novrs) {
1813                 /* Check that it is NSR02 compliant */
1814                 nsr_off = udf_check_vsd(sb);
1815                 if (!nsr_off) {
1816                         if (!silent)
1817                                 udf_warn(sb, "No VRS found\n");
1818                         return 0;
1819                 }
1820                 if (nsr_off == -1)
1821                         udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
1822                 if (!sbi->s_last_block)
1823                         sbi->s_last_block = udf_get_last_block(sb);
1824         } else {
1825                 udf_debug("Validity check skipped because of novrs option\n");
1826         }
1827
1828         /* Look for anchor block and load Volume Descriptor Sequence */
1829         sbi->s_anchor = uopt->anchor;
1830         if (!udf_find_anchor(sb, fileset)) {
1831                 if (!silent)
1832                         udf_warn(sb, "No anchor found\n");
1833                 return 0;
1834         }
1835         return 1;
1836 }
1837
1838 static void udf_open_lvid(struct super_block *sb)
1839 {
1840         struct udf_sb_info *sbi = UDF_SB(sb);
1841         struct buffer_head *bh = sbi->s_lvid_bh;
1842         struct logicalVolIntegrityDesc *lvid;
1843         struct logicalVolIntegrityDescImpUse *lvidiu;
1844
1845         if (!bh)
1846                 return;
1847
1848         mutex_lock(&sbi->s_alloc_mutex);
1849         lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1850         lvidiu = udf_sb_lvidiu(sbi);
1851
1852         lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1853         lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1854         udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1855                                 CURRENT_TIME);
1856         lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1857
1858         lvid->descTag.descCRC = cpu_to_le16(
1859                 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1860                         le16_to_cpu(lvid->descTag.descCRCLength)));
1861
1862         lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1863         mark_buffer_dirty(bh);
1864         sbi->s_lvid_dirty = 0;
1865         mutex_unlock(&sbi->s_alloc_mutex);
1866         /* Make opening of filesystem visible on the media immediately */
1867         sync_dirty_buffer(bh);
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         /* Make closing of filesystem visible on the media immediately */
1909         sync_dirty_buffer(bh);
1910 }
1911
1912 u64 lvid_get_unique_id(struct super_block *sb)
1913 {
1914         struct buffer_head *bh;
1915         struct udf_sb_info *sbi = UDF_SB(sb);
1916         struct logicalVolIntegrityDesc *lvid;
1917         struct logicalVolHeaderDesc *lvhd;
1918         u64 uniqueID;
1919         u64 ret;
1920
1921         bh = sbi->s_lvid_bh;
1922         if (!bh)
1923                 return 0;
1924
1925         lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1926         lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1927
1928         mutex_lock(&sbi->s_alloc_mutex);
1929         ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1930         if (!(++uniqueID & 0xFFFFFFFF))
1931                 uniqueID += 16;
1932         lvhd->uniqueID = cpu_to_le64(uniqueID);
1933         mutex_unlock(&sbi->s_alloc_mutex);
1934         mark_buffer_dirty(bh);
1935
1936         return ret;
1937 }
1938
1939 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1940 {
1941         int ret;
1942         struct inode *inode = NULL;
1943         struct udf_options uopt;
1944         struct kernel_lb_addr rootdir, fileset;
1945         struct udf_sb_info *sbi;
1946
1947         uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1948         uopt.uid = INVALID_UID;
1949         uopt.gid = INVALID_GID;
1950         uopt.umask = 0;
1951         uopt.fmode = UDF_INVALID_MODE;
1952         uopt.dmode = UDF_INVALID_MODE;
1953
1954         sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1955         if (!sbi)
1956                 return -ENOMEM;
1957
1958         sb->s_fs_info = sbi;
1959
1960         mutex_init(&sbi->s_alloc_mutex);
1961
1962         if (!udf_parse_options((char *)options, &uopt, false))
1963                 goto error_out;
1964
1965         if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1966             uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1967                 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1968                 goto error_out;
1969         }
1970 #ifdef CONFIG_UDF_NLS
1971         if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1972                 uopt.nls_map = load_nls_default();
1973                 if (!uopt.nls_map)
1974                         uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1975                 else
1976                         udf_debug("Using default NLS map\n");
1977         }
1978 #endif
1979         if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1980                 uopt.flags |= (1 << UDF_FLAG_UTF8);
1981
1982         fileset.logicalBlockNum = 0xFFFFFFFF;
1983         fileset.partitionReferenceNum = 0xFFFF;
1984
1985         sbi->s_flags = uopt.flags;
1986         sbi->s_uid = uopt.uid;
1987         sbi->s_gid = uopt.gid;
1988         sbi->s_umask = uopt.umask;
1989         sbi->s_fmode = uopt.fmode;
1990         sbi->s_dmode = uopt.dmode;
1991         sbi->s_nls_map = uopt.nls_map;
1992         rwlock_init(&sbi->s_cred_lock);
1993
1994         if (uopt.session == 0xFFFFFFFF)
1995                 sbi->s_session = udf_get_last_session(sb);
1996         else
1997                 sbi->s_session = uopt.session;
1998
1999         udf_debug("Multi-session=%d\n", sbi->s_session);
2000
2001         /* Fill in the rest of the superblock */
2002         sb->s_op = &udf_sb_ops;
2003         sb->s_export_op = &udf_export_ops;
2004
2005         sb->s_magic = UDF_SUPER_MAGIC;
2006         sb->s_time_gran = 1000;
2007
2008         if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2009                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2010         } else {
2011                 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2012                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2013                 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
2014                         if (!silent)
2015                                 pr_notice("Rescanning with blocksize %d\n",
2016                                           UDF_DEFAULT_BLOCKSIZE);
2017                         brelse(sbi->s_lvid_bh);
2018                         sbi->s_lvid_bh = NULL;
2019                         uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2020                         ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2021                 }
2022         }
2023         if (!ret) {
2024                 udf_warn(sb, "No partition found (1)\n");
2025                 goto error_out;
2026         }
2027
2028         udf_debug("Lastblock=%d\n", sbi->s_last_block);
2029
2030         if (sbi->s_lvid_bh) {
2031                 struct logicalVolIntegrityDescImpUse *lvidiu =
2032                                                         udf_sb_lvidiu(sbi);
2033                 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2034                 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2035                 /* uint16_t maxUDFWriteRev =
2036                                 le16_to_cpu(lvidiu->maxUDFWriteRev); */
2037
2038                 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2039                         udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2040                                 le16_to_cpu(lvidiu->minUDFReadRev),
2041                                 UDF_MAX_READ_VERSION);
2042                         goto error_out;
2043                 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
2044                         sb->s_flags |= MS_RDONLY;
2045
2046                 sbi->s_udfrev = minUDFWriteRev;
2047
2048                 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2049                         UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2050                 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2051                         UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2052         }
2053
2054         if (!sbi->s_partitions) {
2055                 udf_warn(sb, "No partition found (2)\n");
2056                 goto error_out;
2057         }
2058
2059         if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2060                         UDF_PART_FLAG_READ_ONLY) {
2061                 pr_notice("Partition marked readonly; forcing readonly mount\n");
2062                 sb->s_flags |= MS_RDONLY;
2063         }
2064
2065         if (udf_find_fileset(sb, &fileset, &rootdir)) {
2066                 udf_warn(sb, "No fileset found\n");
2067                 goto error_out;
2068         }
2069
2070         if (!silent) {
2071                 struct timestamp ts;
2072                 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2073                 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2074                          sbi->s_volume_ident,
2075                          le16_to_cpu(ts.year), ts.month, ts.day,
2076                          ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2077         }
2078         if (!(sb->s_flags & MS_RDONLY))
2079                 udf_open_lvid(sb);
2080
2081         /* Assign the root inode */
2082         /* assign inodes by physical block number */
2083         /* perhaps it's not extensible enough, but for now ... */
2084         inode = udf_iget(sb, &rootdir);
2085         if (!inode) {
2086                 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
2087                        rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2088                 goto error_out;
2089         }
2090
2091         /* Allocate a dentry for the root inode */
2092         sb->s_root = d_make_root(inode);
2093         if (!sb->s_root) {
2094                 udf_err(sb, "Couldn't allocate root dentry\n");
2095                 goto error_out;
2096         }
2097         sb->s_maxbytes = MAX_LFS_FILESIZE;
2098         sb->s_max_links = UDF_MAX_LINKS;
2099         return 0;
2100
2101 error_out:
2102         if (sbi->s_vat_inode)
2103                 iput(sbi->s_vat_inode);
2104 #ifdef CONFIG_UDF_NLS
2105         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2106                 unload_nls(sbi->s_nls_map);
2107 #endif
2108         if (!(sb->s_flags & MS_RDONLY))
2109                 udf_close_lvid(sb);
2110         brelse(sbi->s_lvid_bh);
2111         udf_sb_free_partitions(sb);
2112         kfree(sbi);
2113         sb->s_fs_info = NULL;
2114
2115         return -EINVAL;
2116 }
2117
2118 void _udf_err(struct super_block *sb, const char *function,
2119               const char *fmt, ...)
2120 {
2121         struct va_format vaf;
2122         va_list args;
2123
2124         va_start(args, fmt);
2125
2126         vaf.fmt = fmt;
2127         vaf.va = &args;
2128
2129         pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2130
2131         va_end(args);
2132 }
2133
2134 void _udf_warn(struct super_block *sb, const char *function,
2135                const char *fmt, ...)
2136 {
2137         struct va_format vaf;
2138         va_list args;
2139
2140         va_start(args, fmt);
2141
2142         vaf.fmt = fmt;
2143         vaf.va = &args;
2144
2145         pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2146
2147         va_end(args);
2148 }
2149
2150 static void udf_put_super(struct super_block *sb)
2151 {
2152         struct udf_sb_info *sbi;
2153
2154         sbi = UDF_SB(sb);
2155
2156         if (sbi->s_vat_inode)
2157                 iput(sbi->s_vat_inode);
2158 #ifdef CONFIG_UDF_NLS
2159         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2160                 unload_nls(sbi->s_nls_map);
2161 #endif
2162         if (!(sb->s_flags & MS_RDONLY))
2163                 udf_close_lvid(sb);
2164         brelse(sbi->s_lvid_bh);
2165         udf_sb_free_partitions(sb);
2166         kfree(sb->s_fs_info);
2167         sb->s_fs_info = NULL;
2168 }
2169
2170 static int udf_sync_fs(struct super_block *sb, int wait)
2171 {
2172         struct udf_sb_info *sbi = UDF_SB(sb);
2173
2174         mutex_lock(&sbi->s_alloc_mutex);
2175         if (sbi->s_lvid_dirty) {
2176                 /*
2177                  * Blockdevice will be synced later so we don't have to submit
2178                  * the buffer for IO
2179                  */
2180                 mark_buffer_dirty(sbi->s_lvid_bh);
2181                 sbi->s_lvid_dirty = 0;
2182         }
2183         mutex_unlock(&sbi->s_alloc_mutex);
2184
2185         return 0;
2186 }
2187
2188 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2189 {
2190         struct super_block *sb = dentry->d_sb;
2191         struct udf_sb_info *sbi = UDF_SB(sb);
2192         struct logicalVolIntegrityDescImpUse *lvidiu;
2193         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2194
2195         if (sbi->s_lvid_bh != NULL)
2196                 lvidiu = udf_sb_lvidiu(sbi);
2197         else
2198                 lvidiu = NULL;
2199
2200         buf->f_type = UDF_SUPER_MAGIC;
2201         buf->f_bsize = sb->s_blocksize;
2202         buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2203         buf->f_bfree = udf_count_free(sb);
2204         buf->f_bavail = buf->f_bfree;
2205         buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2206                                           le32_to_cpu(lvidiu->numDirs)) : 0)
2207                         + buf->f_bfree;
2208         buf->f_ffree = buf->f_bfree;
2209         buf->f_namelen = UDF_NAME_LEN - 2;
2210         buf->f_fsid.val[0] = (u32)id;
2211         buf->f_fsid.val[1] = (u32)(id >> 32);
2212
2213         return 0;
2214 }
2215
2216 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2217                                           struct udf_bitmap *bitmap)
2218 {
2219         struct buffer_head *bh = NULL;
2220         unsigned int accum = 0;
2221         int index;
2222         int block = 0, newblock;
2223         struct kernel_lb_addr loc;
2224         uint32_t bytes;
2225         uint8_t *ptr;
2226         uint16_t ident;
2227         struct spaceBitmapDesc *bm;
2228
2229         loc.logicalBlockNum = bitmap->s_extPosition;
2230         loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2231         bh = udf_read_ptagged(sb, &loc, 0, &ident);
2232
2233         if (!bh) {
2234                 udf_err(sb, "udf_count_free failed\n");
2235                 goto out;
2236         } else if (ident != TAG_IDENT_SBD) {
2237                 brelse(bh);
2238                 udf_err(sb, "udf_count_free failed\n");
2239                 goto out;
2240         }
2241
2242         bm = (struct spaceBitmapDesc *)bh->b_data;
2243         bytes = le32_to_cpu(bm->numOfBytes);
2244         index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2245         ptr = (uint8_t *)bh->b_data;
2246
2247         while (bytes > 0) {
2248                 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2249                 accum += bitmap_weight((const unsigned long *)(ptr + index),
2250                                         cur_bytes * 8);
2251                 bytes -= cur_bytes;
2252                 if (bytes) {
2253                         brelse(bh);
2254                         newblock = udf_get_lb_pblock(sb, &loc, ++block);
2255                         bh = udf_tread(sb, newblock);
2256                         if (!bh) {
2257                                 udf_debug("read failed\n");
2258                                 goto out;
2259                         }
2260                         index = 0;
2261                         ptr = (uint8_t *)bh->b_data;
2262                 }
2263         }
2264         brelse(bh);
2265 out:
2266         return accum;
2267 }
2268
2269 static unsigned int udf_count_free_table(struct super_block *sb,
2270                                          struct inode *table)
2271 {
2272         unsigned int accum = 0;
2273         uint32_t elen;
2274         struct kernel_lb_addr eloc;
2275         int8_t etype;
2276         struct extent_position epos;
2277
2278         mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2279         epos.block = UDF_I(table)->i_location;
2280         epos.offset = sizeof(struct unallocSpaceEntry);
2281         epos.bh = NULL;
2282
2283         while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2284                 accum += (elen >> table->i_sb->s_blocksize_bits);
2285
2286         brelse(epos.bh);
2287         mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2288
2289         return accum;
2290 }
2291
2292 static unsigned int udf_count_free(struct super_block *sb)
2293 {
2294         unsigned int accum = 0;
2295         struct udf_sb_info *sbi;
2296         struct udf_part_map *map;
2297
2298         sbi = UDF_SB(sb);
2299         if (sbi->s_lvid_bh) {
2300                 struct logicalVolIntegrityDesc *lvid =
2301                         (struct logicalVolIntegrityDesc *)
2302                         sbi->s_lvid_bh->b_data;
2303                 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2304                         accum = le32_to_cpu(
2305                                         lvid->freeSpaceTable[sbi->s_partition]);
2306                         if (accum == 0xFFFFFFFF)
2307                                 accum = 0;
2308                 }
2309         }
2310
2311         if (accum)
2312                 return accum;
2313
2314         map = &sbi->s_partmaps[sbi->s_partition];
2315         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2316                 accum += udf_count_free_bitmap(sb,
2317                                                map->s_uspace.s_bitmap);
2318         }
2319         if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2320                 accum += udf_count_free_bitmap(sb,
2321                                                map->s_fspace.s_bitmap);
2322         }
2323         if (accum)
2324                 return accum;
2325
2326         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2327                 accum += udf_count_free_table(sb,
2328                                               map->s_uspace.s_table);
2329         }
2330         if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2331                 accum += udf_count_free_table(sb,
2332                                               map->s_fspace.s_table);
2333         }
2334
2335         return accum;
2336 }