Pileus Git - ~andy/linux/blob - 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/smp_lock.h>
  52 #include <linux/buffer_head.h>
  53 #include <linux/vfs.h>
  54 #include <linux/vmalloc.h>
  55 #include <linux/errno.h>
  56 #include <linux/mount.h>
  57 #include <linux/seq_file.h>
  58 #include <linux/bitmap.h>
  59 #include <linux/crc-itu-t.h>
  60 #include <asm/byteorder.h>
  61
  62 #include "udf_sb.h"
  63 #include "udf_i.h"
  64
  65 #include <linux/init.h>
  66 #include <asm/uaccess.h>
  67
  68 #define VDS_POS_PRIMARY_VOL_DESC        0
  69 #define VDS_POS_UNALLOC_SPACE_DESC      1
  70 #define VDS_POS_LOGICAL_VOL_DESC        2
  71 #define VDS_POS_PARTITION_DESC          3
  72 #define VDS_POS_IMP_USE_VOL_DESC        4
  73 #define VDS_POS_VOL_DESC_PTR            5
  74 #define VDS_POS_TERMINATING_DESC        6
  75 #define VDS_POS_LENGTH                  7
  76
  77 #define UDF_DEFAULT_BLOCKSIZE 2048
  78
  79 static char error_buf[1024];
  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 vfsmount *);
  96 static void udf_error(struct super_block *sb, const char *function,
  97                       const char *fmt, ...);
  98
  99 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
 100 {
 101         struct logicalVolIntegrityDesc *lvid =
 102                 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
 103         __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
 104         __u32 offset = number_of_partitions * 2 *
 105                                 sizeof(uint32_t)/sizeof(uint8_t);
 106         return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
 107 }
 108
 109 /* UDF filesystem type */
 110 static struct dentry *udf_mount(struct file_system_type *fs_type,
 111                       int flags, const char *dev_name, void *data)
 112 {
 113         return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
 114 }
 115
 116 static struct file_system_type udf_fstype = {
 117         .owner          = THIS_MODULE,
 118         .name           = "udf",
 119         .mount          = udf_mount,
 120         .kill_sb        = kill_block_super,
 121         .fs_flags       = FS_REQUIRES_DEV,
 122 };
 123
 124 static struct kmem_cache *udf_inode_cachep;
 125
 126 static struct inode *udf_alloc_inode(struct super_block *sb)
 127 {
 128         struct udf_inode_info *ei;
 129         ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
 130         if (!ei)
 131                 return NULL;
 132
 133         ei->i_unique = 0;
 134         ei->i_lenExtents = 0;
 135         ei->i_next_alloc_block = 0;
 136         ei->i_next_alloc_goal = 0;
 137         ei->i_strat4096 = 0;
 138
 139         return &ei->vfs_inode;
 140 }
 141
 142 static void udf_destroy_inode(struct inode *inode)
 143 {
 144         kmem_cache_free(udf_inode_cachep, UDF_I(inode));
 145 }
 146
 147 static void init_once(void *foo)
 148 {
 149         struct udf_inode_info *ei = (struct udf_inode_info *)foo;
 150
 151         ei->i_ext.i_data = NULL;
 152         inode_init_once(&ei->vfs_inode);
 153 }
 154
 155 static int init_inodecache(void)
 156 {
 157         udf_inode_cachep = kmem_cache_create("udf_inode_cache",
 158                                              sizeof(struct udf_inode_info),
 159                                              0, (SLAB_RECLAIM_ACCOUNT |
 160                                                  SLAB_MEM_SPREAD),
 161                                              init_once);
 162         if (!udf_inode_cachep)
 163                 return -ENOMEM;
 164         return 0;
 165 }
 166
 167 static void destroy_inodecache(void)
 168 {
 169         kmem_cache_destroy(udf_inode_cachep);
 170 }
 171
 172 /* Superblock operations */
 173 static const struct super_operations udf_sb_ops = {
 174         .alloc_inode    = udf_alloc_inode,
 175         .destroy_inode  = udf_destroy_inode,
 176         .write_inode    = udf_write_inode,
 177         .evict_inode    = udf_evict_inode,
 178         .put_super      = udf_put_super,
 179         .sync_fs        = udf_sync_fs,
 180         .statfs         = udf_statfs,
 181         .remount_fs     = udf_remount_fs,
 182         .show_options   = udf_show_options,
 183 };
 184
 185 struct udf_options {
 186         unsigned char novrs;
 187         unsigned int blocksize;
 188         unsigned int session;
 189         unsigned int lastblock;
 190         unsigned int anchor;
 191         unsigned int volume;
 192         unsigned short partition;
 193         unsigned int fileset;
 194         unsigned int rootdir;
 195         unsigned int flags;
 196         mode_t umask;
 197         gid_t gid;
 198         uid_t uid;
 199         mode_t fmode;
 200         mode_t dmode;
 201         struct nls_table *nls_map;
 202 };
 203
 204 static int __init init_udf_fs(void)
 205 {
 206         int err;
 207
 208         err = init_inodecache();
 209         if (err)
 210                 goto out1;
 211         err = register_filesystem(&udf_fstype);
 212         if (err)
 213                 goto out;
 214
 215         return 0;
 216
 217 out:
 218         destroy_inodecache();
 219
 220 out1:
 221         return err;
 222 }
 223
 224 static void __exit exit_udf_fs(void)
 225 {
 226         unregister_filesystem(&udf_fstype);
 227         destroy_inodecache();
 228 }
 229
 230 module_init(init_udf_fs)
 231 module_exit(exit_udf_fs)
 232
 233 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
 234 {
 235         struct udf_sb_info *sbi = UDF_SB(sb);
 236
 237         sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
 238                                   GFP_KERNEL);
 239         if (!sbi->s_partmaps) {
 240                 udf_error(sb, __func__,
 241                           "Unable to allocate space for %d partition maps",
 242                           count);
 243                 sbi->s_partitions = 0;
 244                 return -ENOMEM;
 245         }
 246
 247         sbi->s_partitions = count;
 248         return 0;
 249 }
 250
 251 static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
 252 {
 253         struct super_block *sb = mnt->mnt_sb;
 254         struct udf_sb_info *sbi = UDF_SB(sb);
 255
 256         if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
 257                 seq_puts(seq, ",nostrict");
 258         if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
 259                 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
 260         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
 261                 seq_puts(seq, ",unhide");
 262         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
 263                 seq_puts(seq, ",undelete");
 264         if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
 265                 seq_puts(seq, ",noadinicb");
 266         if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
 267                 seq_puts(seq, ",shortad");
 268         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
 269                 seq_puts(seq, ",uid=forget");
 270         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
 271                 seq_puts(seq, ",uid=ignore");
 272         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
 273                 seq_puts(seq, ",gid=forget");
 274         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
 275                 seq_puts(seq, ",gid=ignore");
 276         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
 277                 seq_printf(seq, ",uid=%u", sbi->s_uid);
 278         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
 279                 seq_printf(seq, ",gid=%u", sbi->s_gid);
 280         if (sbi->s_umask != 0)
 281                 seq_printf(seq, ",umask=%o", sbi->s_umask);
 282         if (sbi->s_fmode != UDF_INVALID_MODE)
 283                 seq_printf(seq, ",mode=%o", sbi->s_fmode);
 284         if (sbi->s_dmode != UDF_INVALID_MODE)
 285                 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
 286         if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
 287                 seq_printf(seq, ",session=%u", sbi->s_session);
 288         if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
 289                 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
 290         if (sbi->s_anchor != 0)
 291                 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
 292         /*
 293          * volume, partition, fileset and rootdir seem to be ignored
 294          * currently
 295          */
 296         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
 297                 seq_puts(seq, ",utf8");
 298         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
 299                 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
 300
 301         return 0;
 302 }
 303
 304 /*
 305  * udf_parse_options
 306  *
 307  * PURPOSE
 308  *      Parse mount options.
 309  *
 310  * DESCRIPTION
 311  *      The following mount options are supported:
 312  *
 313  *      gid=            Set the default group.
 314  *      umask=          Set the default umask.
 315  *      mode=           Set the default file permissions.
 316  *      dmode=          Set the default directory permissions.
 317  *      uid=            Set the default user.
 318  *      bs=             Set the block size.
 319  *      unhide          Show otherwise hidden files.
 320  *      undelete        Show deleted files in lists.
 321  *      adinicb         Embed data in the inode (default)
 322  *      noadinicb       Don't embed data in the inode
 323  *      shortad         Use short ad's
 324  *      longad          Use long ad's (default)
 325  *      nostrict        Unset strict conformance
 326  *      iocharset=      Set the NLS character set
 327  *
 328  *      The remaining are for debugging and disaster recovery:
 329  *
 330  *      novrs           Skip volume sequence recognition
 331  *
 332  *      The following expect a offset from 0.
 333  *
 334  *      session=        Set the CDROM session (default= last session)
 335  *      anchor=         Override standard anchor location. (default= 256)
 336  *      volume=         Override the VolumeDesc location. (unused)
 337  *      partition=      Override the PartitionDesc location. (unused)
 338  *      lastblock=      Set the last block of the filesystem/
 339  *
 340  *      The following expect a offset from the partition root.
 341  *
 342  *      fileset=        Override the fileset block location. (unused)
 343  *      rootdir=        Override the root directory location. (unused)
 344  *              WARNING: overriding the rootdir to a non-directory may
 345  *              yield highly unpredictable results.
 346  *
 347  * PRE-CONDITIONS
 348  *      options         Pointer to mount options string.
 349  *      uopts           Pointer to mount options variable.
 350  *
 351  * POST-CONDITIONS
 352  *      <return>        1       Mount options parsed okay.
 353  *      <return>        0       Error parsing mount options.
 354  *
 355  * HISTORY
 356  *      July 1, 1997 - Andrew E. Mileski
 357  *      Written, tested, and released.
 358  */
 359
 360 enum {
 361         Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
 362         Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
 363         Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
 364         Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
 365         Opt_rootdir, Opt_utf8, Opt_iocharset,
 366         Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
 367         Opt_fmode, Opt_dmode
 368 };
 369
 370 static const match_table_t tokens = {
 371         {Opt_novrs,     "novrs"},
 372         {Opt_nostrict,  "nostrict"},
 373         {Opt_bs,        "bs=%u"},
 374         {Opt_unhide,    "unhide"},
 375         {Opt_undelete,  "undelete"},
 376         {Opt_noadinicb, "noadinicb"},
 377         {Opt_adinicb,   "adinicb"},
 378         {Opt_shortad,   "shortad"},
 379         {Opt_longad,    "longad"},
 380         {Opt_uforget,   "uid=forget"},
 381         {Opt_uignore,   "uid=ignore"},
 382         {Opt_gforget,   "gid=forget"},
 383         {Opt_gignore,   "gid=ignore"},
 384         {Opt_gid,       "gid=%u"},
 385         {Opt_uid,       "uid=%u"},
 386         {Opt_umask,     "umask=%o"},
 387         {Opt_session,   "session=%u"},
 388         {Opt_lastblock, "lastblock=%u"},
 389         {Opt_anchor,    "anchor=%u"},
 390         {Opt_volume,    "volume=%u"},
 391         {Opt_partition, "partition=%u"},
 392         {Opt_fileset,   "fileset=%u"},
 393         {Opt_rootdir,   "rootdir=%u"},
 394         {Opt_utf8,      "utf8"},
 395         {Opt_iocharset, "iocharset=%s"},
 396         {Opt_fmode,     "mode=%o"},
 397         {Opt_dmode,     "dmode=%o"},
 398         {Opt_err,       NULL}
 399 };
 400
 401 static int udf_parse_options(char *options, struct udf_options *uopt,
 402                              bool remount)
 403 {
 404         char *p;
 405         int option;
 406
 407         uopt->novrs = 0;
 408         uopt->partition = 0xFFFF;
 409         uopt->session = 0xFFFFFFFF;
 410         uopt->lastblock = 0;
 411         uopt->anchor = 0;
 412         uopt->volume = 0xFFFFFFFF;
 413         uopt->rootdir = 0xFFFFFFFF;
 414         uopt->fileset = 0xFFFFFFFF;
 415         uopt->nls_map = NULL;
 416
 417         if (!options)
 418                 return 1;
 419
 420         while ((p = strsep(&options, ",")) != NULL) {
 421                 substring_t args[MAX_OPT_ARGS];
 422                 int token;
 423                 if (!*p)
 424                         continue;
 425
 426                 token = match_token(p, tokens, args);
 427                 switch (token) {
 428                 case Opt_novrs:
 429                         uopt->novrs = 1;
 430                         break;
 431                 case Opt_bs:
 432                         if (match_int(&args[0], &option))
 433                                 return 0;
 434                         uopt->blocksize = option;
 435                         uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
 436                         break;
 437                 case Opt_unhide:
 438                         uopt->flags |= (1 << UDF_FLAG_UNHIDE);
 439                         break;
 440                 case Opt_undelete:
 441                         uopt->flags |= (1 << UDF_FLAG_UNDELETE);
 442                         break;
 443                 case Opt_noadinicb:
 444                         uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
 445                         break;
 446                 case Opt_adinicb:
 447                         uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
 448                         break;
 449                 case Opt_shortad:
 450                         uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
 451                         break;
 452                 case Opt_longad:
 453                         uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
 454                         break;
 455                 case Opt_gid:
 456                         if (match_int(args, &option))
 457                                 return 0;
 458                         uopt->gid = option;
 459                         uopt->flags |= (1 << UDF_FLAG_GID_SET);
 460                         break;
 461                 case Opt_uid:
 462                         if (match_int(args, &option))
 463                                 return 0;
 464                         uopt->uid = option;
 465                         uopt->flags |= (1 << UDF_FLAG_UID_SET);
 466                         break;
 467                 case Opt_umask:
 468                         if (match_octal(args, &option))
 469                                 return 0;
 470                         uopt->umask = option;
 471                         break;
 472                 case Opt_nostrict:
 473                         uopt->flags &= ~(1 << UDF_FLAG_STRICT);
 474                         break;
 475                 case Opt_session:
 476                         if (match_int(args, &option))
 477                                 return 0;
 478                         uopt->session = option;
 479                         if (!remount)
 480                                 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
 481                         break;
 482                 case Opt_lastblock:
 483                         if (match_int(args, &option))
 484                                 return 0;
 485                         uopt->lastblock = option;
 486                         if (!remount)
 487                                 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
 488                         break;
 489                 case Opt_anchor:
 490                         if (match_int(args, &option))
 491                                 return 0;
 492                         uopt->anchor = option;
 493                         break;
 494                 case Opt_volume:
 495                         if (match_int(args, &option))
 496                                 return 0;
 497                         uopt->volume = option;
 498                         break;
 499                 case Opt_partition:
 500                         if (match_int(args, &option))
 501                                 return 0;
 502                         uopt->partition = option;
 503                         break;
 504                 case Opt_fileset:
 505                         if (match_int(args, &option))
 506                                 return 0;
 507                         uopt->fileset = option;
 508                         break;
 509                 case Opt_rootdir:
 510                         if (match_int(args, &option))
 511                                 return 0;
 512                         uopt->rootdir = option;
 513                         break;
 514                 case Opt_utf8:
 515                         uopt->flags |= (1 << UDF_FLAG_UTF8);
 516                         break;
 517 #ifdef CONFIG_UDF_NLS
 518                 case Opt_iocharset:
 519                         uopt->nls_map = load_nls(args[0].from);
 520                         uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
 521                         break;
 522 #endif
 523                 case Opt_uignore:
 524                         uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
 525                         break;
 526                 case Opt_uforget:
 527                         uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
 528                         break;
 529                 case Opt_gignore:
 530                         uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
 531                         break;
 532                 case Opt_gforget:
 533                         uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
 534                         break;
 535                 case Opt_fmode:
 536                         if (match_octal(args, &option))
 537                                 return 0;
 538                         uopt->fmode = option & 0777;
 539                         break;
 540                 case Opt_dmode:
 541                         if (match_octal(args, &option))
 542                                 return 0;
 543                         uopt->dmode = option & 0777;
 544                         break;
 545                 default:
 546                         printk(KERN_ERR "udf: bad mount option \"%s\" "
 547                                "or missing value\n", p);
 548                         return 0;
 549                 }
 550         }
 551         return 1;
 552 }
 553
 554 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
 555 {
 556         struct udf_options uopt;
 557         struct udf_sb_info *sbi = UDF_SB(sb);
 558         int error = 0;
 559
 560         uopt.flags = sbi->s_flags;
 561         uopt.uid   = sbi->s_uid;
 562         uopt.gid   = sbi->s_gid;
 563         uopt.umask = sbi->s_umask;
 564         uopt.fmode = sbi->s_fmode;
 565         uopt.dmode = sbi->s_dmode;
 566
 567         if (!udf_parse_options(options, &uopt, true))
 568                 return -EINVAL;
 569
 570         lock_kernel();
 571         write_lock(&sbi->s_cred_lock);
 572         sbi->s_flags = uopt.flags;
 573         sbi->s_uid   = uopt.uid;
 574         sbi->s_gid   = uopt.gid;
 575         sbi->s_umask = uopt.umask;
 576         sbi->s_fmode = uopt.fmode;
 577         sbi->s_dmode = uopt.dmode;
 578         write_unlock(&sbi->s_cred_lock);
 579
 580         if (sbi->s_lvid_bh) {
 581                 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
 582                 if (write_rev > UDF_MAX_WRITE_VERSION)
 583                         *flags |= MS_RDONLY;
 584         }
 585
 586         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
 587                 goto out_unlock;
 588
 589         if (*flags & MS_RDONLY)
 590                 udf_close_lvid(sb);
 591         else
 592                 udf_open_lvid(sb);
 593
 594 out_unlock:
 595         unlock_kernel();
 596         return error;
 597 }
 598
 599 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
 600 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
 601 static loff_t udf_check_vsd(struct super_block *sb)
 602 {
 603         struct volStructDesc *vsd = NULL;
 604         loff_t sector = 32768;
 605         int sectorsize;
 606         struct buffer_head *bh = NULL;
 607         int nsr02 = 0;
 608         int nsr03 = 0;
 609         struct udf_sb_info *sbi;
 610
 611         sbi = UDF_SB(sb);
 612         if (sb->s_blocksize < sizeof(struct volStructDesc))
 613                 sectorsize = sizeof(struct volStructDesc);
 614         else
 615                 sectorsize = sb->s_blocksize;
 616
 617         sector += (sbi->s_session << sb->s_blocksize_bits);
 618
 619         udf_debug("Starting at sector %u (%ld byte sectors)\n",
 620                   (unsigned int)(sector >> sb->s_blocksize_bits),
 621                   sb->s_blocksize);
 622         /* Process the sequence (if applicable) */
 623         for (; !nsr02 && !nsr03; sector += sectorsize) {
 624                 /* Read a block */
 625                 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
 626                 if (!bh)
 627                         break;
 628
 629                 /* Look for ISO  descriptors */
 630                 vsd = (struct volStructDesc *)(bh->b_data +
 631                                               (sector & (sb->s_blocksize - 1)));
 632
 633                 if (vsd->stdIdent[0] == 0) {
 634                         brelse(bh);
 635                         break;
 636                 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
 637                                     VSD_STD_ID_LEN)) {
 638                         switch (vsd->structType) {
 639                         case 0:
 640                                 udf_debug("ISO9660 Boot Record found\n");
 641                                 break;
 642                         case 1:
 643                                 udf_debug("ISO9660 Primary Volume Descriptor "
 644                                           "found\n");
 645                                 break;
 646                         case 2:
 647                                 udf_debug("ISO9660 Supplementary Volume "
 648                                           "Descriptor found\n");
 649                                 break;
 650                         case 3:
 651                                 udf_debug("ISO9660 Volume Partition Descriptor "
 652                                           "found\n");
 653                                 break;
 654                         case 255:
 655                                 udf_debug("ISO9660 Volume Descriptor Set "
 656                                           "Terminator found\n");
 657                                 break;
 658                         default:
 659                                 udf_debug("ISO9660 VRS (%u) found\n",
 660                                           vsd->structType);
 661                                 break;
 662                         }
 663                 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
 664                                     VSD_STD_ID_LEN))
 665                         ; /* nothing */
 666                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
 667                                     VSD_STD_ID_LEN)) {
 668                         brelse(bh);
 669                         break;
 670                 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
 671                                     VSD_STD_ID_LEN))
 672                         nsr02 = sector;
 673                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
 674                                     VSD_STD_ID_LEN))
 675                         nsr03 = sector;
 676                 brelse(bh);
 677         }
 678
 679         if (nsr03)
 680                 return nsr03;
 681         else if (nsr02)
 682                 return nsr02;
 683         else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
 684                 return -1;
 685         else
 686                 return 0;
 687 }
 688
 689 static int udf_find_fileset(struct super_block *sb,
 690                             struct kernel_lb_addr *fileset,
 691                             struct kernel_lb_addr *root)
 692 {
 693         struct buffer_head *bh = NULL;
 694         long lastblock;
 695         uint16_t ident;
 696         struct udf_sb_info *sbi;
 697
 698         if (fileset->logicalBlockNum != 0xFFFFFFFF ||
 699             fileset->partitionReferenceNum != 0xFFFF) {
 700                 bh = udf_read_ptagged(sb, fileset, 0, &ident);
 701
 702                 if (!bh) {
 703                         return 1;
 704                 } else if (ident != TAG_IDENT_FSD) {
 705                         brelse(bh);
 706                         return 1;
 707                 }
 708
 709         }
 710
 711         sbi = UDF_SB(sb);
 712         if (!bh) {
 713                 /* Search backwards through the partitions */
 714                 struct kernel_lb_addr newfileset;
 715
 716 /* --> cvg: FIXME - is it reasonable? */
 717                 return 1;
 718
 719                 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
 720                      (newfileset.partitionReferenceNum != 0xFFFF &&
 721                       fileset->logicalBlockNum == 0xFFFFFFFF &&
 722                       fileset->partitionReferenceNum == 0xFFFF);
 723                      newfileset.partitionReferenceNum--) {
 724                         lastblock = sbi->s_partmaps
 725                                         [newfileset.partitionReferenceNum]
 726                                                 .s_partition_len;
 727                         newfileset.logicalBlockNum = 0;
 728
 729                         do {
 730                                 bh = udf_read_ptagged(sb, &newfileset, 0,
 731                                                       &ident);
 732                                 if (!bh) {
 733                                         newfileset.logicalBlockNum++;
 734                                         continue;
 735                                 }
 736
 737                                 switch (ident) {
 738                                 case TAG_IDENT_SBD:
 739                                 {
 740                                         struct spaceBitmapDesc *sp;
 741                                         sp = (struct spaceBitmapDesc *)
 742                                                                 bh->b_data;
 743                                         newfileset.logicalBlockNum += 1 +
 744                                                 ((le32_to_cpu(sp->numOfBytes) +
 745                                                   sizeof(struct spaceBitmapDesc)
 746                                                   - 1) >> sb->s_blocksize_bits);
 747                                         brelse(bh);
 748                                         break;
 749                                 }
 750                                 case TAG_IDENT_FSD:
 751                                         *fileset = newfileset;
 752                                         break;
 753                                 default:
 754                                         newfileset.logicalBlockNum++;
 755                                         brelse(bh);
 756                                         bh = NULL;
 757                                         break;
 758                                 }
 759                         } while (newfileset.logicalBlockNum < lastblock &&
 760                                  fileset->logicalBlockNum == 0xFFFFFFFF &&
 761                                  fileset->partitionReferenceNum == 0xFFFF);
 762                 }
 763         }
 764
 765         if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
 766              fileset->partitionReferenceNum != 0xFFFF) && bh) {
 767                 udf_debug("Fileset at block=%d, partition=%d\n",
 768                           fileset->logicalBlockNum,
 769                           fileset->partitionReferenceNum);
 770
 771                 sbi->s_partition = fileset->partitionReferenceNum;
 772                 udf_load_fileset(sb, bh, root);
 773                 brelse(bh);
 774                 return 0;
 775         }
 776         return 1;
 777 }
 778
 779 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
 780 {
 781         struct primaryVolDesc *pvoldesc;
 782         struct ustr *instr, *outstr;
 783         struct buffer_head *bh;
 784         uint16_t ident;
 785         int ret = 1;
 786
 787         instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
 788         if (!instr)
 789                 return 1;
 790
 791         outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
 792         if (!outstr)
 793                 goto out1;
 794
 795         bh = udf_read_tagged(sb, block, block, &ident);
 796         if (!bh)
 797                 goto out2;
 798
 799         BUG_ON(ident != TAG_IDENT_PVD);
 800
 801         pvoldesc = (struct primaryVolDesc *)bh->b_data;
 802
 803         if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
 804                               pvoldesc->recordingDateAndTime)) {
 805 #ifdef UDFFS_DEBUG
 806                 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
 807                 udf_debug("recording time %04u/%02u/%02u"
 808                           " %02u:%02u (%x)\n",
 809                           le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
 810                           ts->minute, le16_to_cpu(ts->typeAndTimezone));
 811 #endif
 812         }
 813
 814         if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
 815                 if (udf_CS0toUTF8(outstr, instr)) {
 816                         strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
 817                                 outstr->u_len > 31 ? 31 : outstr->u_len);
 818                         udf_debug("volIdent[] = '%s'\n",
 819                                         UDF_SB(sb)->s_volume_ident);
 820                 }
 821
 822         if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
 823                 if (udf_CS0toUTF8(outstr, instr))
 824                         udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
 825
 826         brelse(bh);
 827         ret = 0;
 828 out2:
 829         kfree(outstr);
 830 out1:
 831         kfree(instr);
 832         return ret;
 833 }
 834
 835 static int udf_load_metadata_files(struct super_block *sb, int partition)
 836 {
 837         struct udf_sb_info *sbi = UDF_SB(sb);
 838         struct udf_part_map *map;
 839         struct udf_meta_data *mdata;
 840         struct kernel_lb_addr addr;
 841         int fe_error = 0;
 842
 843         map = &sbi->s_partmaps[partition];
 844         mdata = &map->s_type_specific.s_metadata;
 845
 846         /* metadata address */
 847         addr.logicalBlockNum =  mdata->s_meta_file_loc;
 848         addr.partitionReferenceNum = map->s_partition_num;
 849
 850         udf_debug("Metadata file location: block = %d part = %d\n",
 851                           addr.logicalBlockNum, addr.partitionReferenceNum);
 852
 853         mdata->s_metadata_fe = udf_iget(sb, &addr);
 854
 855         if (mdata->s_metadata_fe == NULL) {
 856                 udf_warning(sb, __func__, "metadata inode efe not found, "
 857                                 "will try mirror inode.");
 858                 fe_error = 1;
 859         } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
 860                  ICBTAG_FLAG_AD_SHORT) {
 861                 udf_warning(sb, __func__, "metadata inode efe does not have "
 862                         "short allocation descriptors!");
 863                 fe_error = 1;
 864                 iput(mdata->s_metadata_fe);
 865                 mdata->s_metadata_fe = NULL;
 866         }
 867
 868         /* mirror file entry */
 869         addr.logicalBlockNum = mdata->s_mirror_file_loc;
 870         addr.partitionReferenceNum = map->s_partition_num;
 871
 872         udf_debug("Mirror metadata file location: block = %d part = %d\n",
 873                           addr.logicalBlockNum, addr.partitionReferenceNum);
 874
 875         mdata->s_mirror_fe = udf_iget(sb, &addr);
 876
 877         if (mdata->s_mirror_fe == NULL) {
 878                 if (fe_error) {
 879                         udf_error(sb, __func__, "mirror inode efe not found "
 880                         "and metadata inode is missing too, exiting...");
 881                         goto error_exit;
 882                 } else
 883                         udf_warning(sb, __func__, "mirror inode efe not found,"
 884                                         " but metadata inode is OK");
 885         } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
 886                  ICBTAG_FLAG_AD_SHORT) {
 887                 udf_warning(sb, __func__, "mirror inode efe does not have "
 888                         "short allocation descriptors!");
 889                 iput(mdata->s_mirror_fe);
 890                 mdata->s_mirror_fe = NULL;
 891                 if (fe_error)
 892                         goto error_exit;
 893         }
 894
 895         /*
 896          * bitmap file entry
 897          * Note:
 898          * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
 899         */
 900         if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
 901                 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
 902                 addr.partitionReferenceNum = map->s_partition_num;
 903
 904                 udf_debug("Bitmap file location: block = %d part = %d\n",
 905                         addr.logicalBlockNum, addr.partitionReferenceNum);
 906
 907                 mdata->s_bitmap_fe = udf_iget(sb, &addr);
 908
 909                 if (mdata->s_bitmap_fe == NULL) {
 910                         if (sb->s_flags & MS_RDONLY)
 911                                 udf_warning(sb, __func__, "bitmap inode efe "
 912                                         "not found but it's ok since the disc"
 913                                         " is mounted read-only");
 914                         else {
 915                                 udf_error(sb, __func__, "bitmap inode efe not "
 916                                         "found and attempted read-write mount");
 917                                 goto error_exit;
 918                         }
 919                 }
 920         }
 921
 922         udf_debug("udf_load_metadata_files Ok\n");
 923
 924         return 0;
 925
 926 error_exit:
 927         return 1;
 928 }
 929
 930 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
 931                              struct kernel_lb_addr *root)
 932 {
 933         struct fileSetDesc *fset;
 934
 935         fset = (struct fileSetDesc *)bh->b_data;
 936
 937         *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
 938
 939         UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
 940
 941         udf_debug("Rootdir at block=%d, partition=%d\n",
 942                   root->logicalBlockNum, root->partitionReferenceNum);
 943 }
 944
 945 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
 946 {
 947         struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
 948         return DIV_ROUND_UP(map->s_partition_len +
 949                             (sizeof(struct spaceBitmapDesc) << 3),
 950                             sb->s_blocksize * 8);
 951 }
 952
 953 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
 954 {
 955         struct udf_bitmap *bitmap;
 956         int nr_groups;
 957         int size;
 958
 959         nr_groups = udf_compute_nr_groups(sb, index);
 960         size = sizeof(struct udf_bitmap) +
 961                 (sizeof(struct buffer_head *) * nr_groups);
 962
 963         if (size <= PAGE_SIZE)
 964                 bitmap = kzalloc(size, GFP_KERNEL);
 965         else
 966                 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
 967
 968         if (bitmap == NULL) {
 969                 udf_error(sb, __func__,
 970                           "Unable to allocate space for bitmap "
 971                           "and %d buffer_head pointers", nr_groups);
 972                 return NULL;
 973         }
 974
 975         bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
 976         bitmap->s_nr_groups = nr_groups;
 977         return bitmap;
 978 }
 979
 980 static int udf_fill_partdesc_info(struct super_block *sb,
 981                 struct partitionDesc *p, int p_index)
 982 {
 983         struct udf_part_map *map;
 984         struct udf_sb_info *sbi = UDF_SB(sb);
 985         struct partitionHeaderDesc *phd;
 986
 987         map = &sbi->s_partmaps[p_index];
 988
 989         map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
 990         map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
 991
 992         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
 993                 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
 994         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
 995                 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
 996         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
 997                 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
 998         if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
 999                 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1000
1001         udf_debug("Partition (%d type %x) starts at physical %d, "
1002                   "block length %d\n", p_index,
1003                   map->s_partition_type, map->s_partition_root,
1004                   map->s_partition_len);
1005
1006         if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1007             strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1008                 return 0;
1009
1010         phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1011         if (phd->unallocSpaceTable.extLength) {
1012                 struct kernel_lb_addr loc = {
1013                         .logicalBlockNum = le32_to_cpu(
1014                                 phd->unallocSpaceTable.extPosition),
1015                         .partitionReferenceNum = p_index,
1016                 };
1017
1018                 map->s_uspace.s_table = udf_iget(sb, &loc);
1019                 if (!map->s_uspace.s_table) {
1020                         udf_debug("cannot load unallocSpaceTable (part %d)\n",
1021                                         p_index);
1022                         return 1;
1023                 }
1024                 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1025                 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1026                                 p_index, map->s_uspace.s_table->i_ino);
1027         }
1028
1029         if (phd->unallocSpaceBitmap.extLength) {
1030                 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1031                 if (!bitmap)
1032                         return 1;
1033                 map->s_uspace.s_bitmap = bitmap;
1034                 bitmap->s_extLength = le32_to_cpu(
1035                                 phd->unallocSpaceBitmap.extLength);
1036                 bitmap->s_extPosition = le32_to_cpu(
1037                                 phd->unallocSpaceBitmap.extPosition);
1038                 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1039                 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1040                                                 bitmap->s_extPosition);
1041         }
1042
1043         if (phd->partitionIntegrityTable.extLength)
1044                 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1045
1046         if (phd->freedSpaceTable.extLength) {
1047                 struct kernel_lb_addr loc = {
1048                         .logicalBlockNum = le32_to_cpu(
1049                                 phd->freedSpaceTable.extPosition),
1050                         .partitionReferenceNum = p_index,
1051                 };
1052
1053                 map->s_fspace.s_table = udf_iget(sb, &loc);
1054                 if (!map->s_fspace.s_table) {
1055                         udf_debug("cannot load freedSpaceTable (part %d)\n",
1056                                 p_index);
1057                         return 1;
1058                 }
1059
1060                 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1061                 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1062                                 p_index, map->s_fspace.s_table->i_ino);
1063         }
1064
1065         if (phd->freedSpaceBitmap.extLength) {
1066                 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1067                 if (!bitmap)
1068                         return 1;
1069                 map->s_fspace.s_bitmap = bitmap;
1070                 bitmap->s_extLength = le32_to_cpu(
1071                                 phd->freedSpaceBitmap.extLength);
1072                 bitmap->s_extPosition = le32_to_cpu(
1073                                 phd->freedSpaceBitmap.extPosition);
1074                 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1075                 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1076                                         bitmap->s_extPosition);
1077         }
1078         return 0;
1079 }
1080
1081 static void udf_find_vat_block(struct super_block *sb, int p_index,
1082                                int type1_index, sector_t start_block)
1083 {
1084         struct udf_sb_info *sbi = UDF_SB(sb);
1085         struct udf_part_map *map = &sbi->s_partmaps[p_index];
1086         sector_t vat_block;
1087         struct kernel_lb_addr ino;
1088
1089         /*
1090          * VAT file entry is in the last recorded block. Some broken disks have
1091          * it a few blocks before so try a bit harder...
1092          */
1093         ino.partitionReferenceNum = type1_index;
1094         for (vat_block = start_block;
1095              vat_block >= map->s_partition_root &&
1096              vat_block >= start_block - 3 &&
1097              !sbi->s_vat_inode; vat_block--) {
1098                 ino.logicalBlockNum = vat_block - map->s_partition_root;
1099                 sbi->s_vat_inode = udf_iget(sb, &ino);
1100         }
1101 }
1102
1103 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1104 {
1105         struct udf_sb_info *sbi = UDF_SB(sb);
1106         struct udf_part_map *map = &sbi->s_partmaps[p_index];
1107         struct buffer_head *bh = NULL;
1108         struct udf_inode_info *vati;
1109         uint32_t pos;
1110         struct virtualAllocationTable20 *vat20;
1111         sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1112
1113         udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1114         if (!sbi->s_vat_inode &&
1115             sbi->s_last_block != blocks - 1) {
1116                 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1117                        " last recorded block (%lu), retrying with the last "
1118                        "block of the device (%lu).\n",
1119                        (unsigned long)sbi->s_last_block,
1120                        (unsigned long)blocks - 1);
1121                 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1122         }
1123         if (!sbi->s_vat_inode)
1124                 return 1;
1125
1126         if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1127                 map->s_type_specific.s_virtual.s_start_offset = 0;
1128                 map->s_type_specific.s_virtual.s_num_entries =
1129                         (sbi->s_vat_inode->i_size - 36) >> 2;
1130         } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1131                 vati = UDF_I(sbi->s_vat_inode);
1132                 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1133                         pos = udf_block_map(sbi->s_vat_inode, 0);
1134                         bh = sb_bread(sb, pos);
1135                         if (!bh)
1136                                 return 1;
1137                         vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1138                 } else {
1139                         vat20 = (struct virtualAllocationTable20 *)
1140                                                         vati->i_ext.i_data;
1141                 }
1142
1143                 map->s_type_specific.s_virtual.s_start_offset =
1144                         le16_to_cpu(vat20->lengthHeader);
1145                 map->s_type_specific.s_virtual.s_num_entries =
1146                         (sbi->s_vat_inode->i_size -
1147                                 map->s_type_specific.s_virtual.
1148                                         s_start_offset) >> 2;
1149                 brelse(bh);
1150         }
1151         return 0;
1152 }
1153
1154 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1155 {
1156         struct buffer_head *bh;
1157         struct partitionDesc *p;
1158         struct udf_part_map *map;
1159         struct udf_sb_info *sbi = UDF_SB(sb);
1160         int i, type1_idx;
1161         uint16_t partitionNumber;
1162         uint16_t ident;
1163         int ret = 0;
1164
1165         bh = udf_read_tagged(sb, block, block, &ident);
1166         if (!bh)
1167                 return 1;
1168         if (ident != TAG_IDENT_PD)
1169                 goto out_bh;
1170
1171         p = (struct partitionDesc *)bh->b_data;
1172         partitionNumber = le16_to_cpu(p->partitionNumber);
1173
1174         /* First scan for TYPE1, SPARABLE and METADATA partitions */
1175         for (i = 0; i < sbi->s_partitions; i++) {
1176                 map = &sbi->s_partmaps[i];
1177                 udf_debug("Searching map: (%d == %d)\n",
1178                           map->s_partition_num, partitionNumber);
1179                 if (map->s_partition_num == partitionNumber &&
1180                     (map->s_partition_type == UDF_TYPE1_MAP15 ||
1181                      map->s_partition_type == UDF_SPARABLE_MAP15))
1182                         break;
1183         }
1184
1185         if (i >= sbi->s_partitions) {
1186                 udf_debug("Partition (%d) not found in partition map\n",
1187                           partitionNumber);
1188                 goto out_bh;
1189         }
1190
1191         ret = udf_fill_partdesc_info(sb, p, i);
1192
1193         /*
1194          * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1195          * PHYSICAL partitions are already set up
1196          */
1197         type1_idx = i;
1198         for (i = 0; i < sbi->s_partitions; i++) {
1199                 map = &sbi->s_partmaps[i];
1200
1201                 if (map->s_partition_num == partitionNumber &&
1202                     (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1203                      map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1204                      map->s_partition_type == UDF_METADATA_MAP25))
1205                         break;
1206         }
1207
1208         if (i >= sbi->s_partitions)
1209                 goto out_bh;
1210
1211         ret = udf_fill_partdesc_info(sb, p, i);
1212         if (ret)
1213                 goto out_bh;
1214
1215         if (map->s_partition_type == UDF_METADATA_MAP25) {
1216                 ret = udf_load_metadata_files(sb, i);
1217                 if (ret) {
1218                         printk(KERN_ERR "UDF-fs: error loading MetaData "
1219                         "partition map %d\n", i);
1220                         goto out_bh;
1221                 }
1222         } else {
1223                 ret = udf_load_vat(sb, i, type1_idx);
1224                 if (ret)
1225                         goto out_bh;
1226                 /*
1227                  * Mark filesystem read-only if we have a partition with
1228                  * virtual map since we don't handle writing to it (we
1229                  * overwrite blocks instead of relocating them).
1230                  */
1231                 sb->s_flags |= MS_RDONLY;
1232                 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1233                         "because writing to pseudooverwrite partition is "
1234                         "not implemented.\n");
1235         }
1236 out_bh:
1237         /* In case loading failed, we handle cleanup in udf_fill_super */
1238         brelse(bh);
1239         return ret;
1240 }
1241
1242 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1243                                struct kernel_lb_addr *fileset)
1244 {
1245         struct logicalVolDesc *lvd;
1246         int i, j, offset;
1247         uint8_t type;
1248         struct udf_sb_info *sbi = UDF_SB(sb);
1249         struct genericPartitionMap *gpm;
1250         uint16_t ident;
1251         struct buffer_head *bh;
1252         int ret = 0;
1253
1254         bh = udf_read_tagged(sb, block, block, &ident);
1255         if (!bh)
1256                 return 1;
1257         BUG_ON(ident != TAG_IDENT_LVD);
1258         lvd = (struct logicalVolDesc *)bh->b_data;
1259
1260         i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1261         if (i != 0) {
1262                 ret = i;
1263                 goto out_bh;
1264         }
1265
1266         for (i = 0, offset = 0;
1267              i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1268              i++, offset += gpm->partitionMapLength) {
1269                 struct udf_part_map *map = &sbi->s_partmaps[i];
1270                 gpm = (struct genericPartitionMap *)
1271                                 &(lvd->partitionMaps[offset]);
1272                 type = gpm->partitionMapType;
1273                 if (type == 1) {
1274                         struct genericPartitionMap1 *gpm1 =
1275                                 (struct genericPartitionMap1 *)gpm;
1276                         map->s_partition_type = UDF_TYPE1_MAP15;
1277                         map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1278                         map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1279                         map->s_partition_func = NULL;
1280                 } else if (type == 2) {
1281                         struct udfPartitionMap2 *upm2 =
1282                                                 (struct udfPartitionMap2 *)gpm;
1283                         if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1284                                                 strlen(UDF_ID_VIRTUAL))) {
1285                                 u16 suf =
1286                                         le16_to_cpu(((__le16 *)upm2->partIdent.
1287                                                         identSuffix)[0]);
1288                                 if (suf < 0x0200) {
1289                                         map->s_partition_type =
1290                                                         UDF_VIRTUAL_MAP15;
1291                                         map->s_partition_func =
1292                                                         udf_get_pblock_virt15;
1293                                 } else {
1294                                         map->s_partition_type =
1295                                                         UDF_VIRTUAL_MAP20;
1296                                         map->s_partition_func =
1297                                                         udf_get_pblock_virt20;
1298                                 }
1299                         } else if (!strncmp(upm2->partIdent.ident,
1300                                                 UDF_ID_SPARABLE,
1301                                                 strlen(UDF_ID_SPARABLE))) {
1302                                 uint32_t loc;
1303                                 struct sparingTable *st;
1304                                 struct sparablePartitionMap *spm =
1305                                         (struct sparablePartitionMap *)gpm;
1306
1307                                 map->s_partition_type = UDF_SPARABLE_MAP15;
1308                                 map->s_type_specific.s_sparing.s_packet_len =
1309                                                 le16_to_cpu(spm->packetLength);
1310                                 for (j = 0; j < spm->numSparingTables; j++) {
1311                                         struct buffer_head *bh2;
1312
1313                                         loc = le32_to_cpu(
1314                                                 spm->locSparingTable[j]);
1315                                         bh2 = udf_read_tagged(sb, loc, loc,
1316                                                              &ident);
1317                                         map->s_type_specific.s_sparing.
1318                                                         s_spar_map[j] = bh2;
1319
1320                                         if (bh2 == NULL)
1321                                                 continue;
1322
1323                                         st = (struct sparingTable *)bh2->b_data;
1324                                         if (ident != 0 || strncmp(
1325                                                 st->sparingIdent.ident,
1326                                                 UDF_ID_SPARING,
1327                                                 strlen(UDF_ID_SPARING))) {
1328                                                 brelse(bh2);
1329                                                 map->s_type_specific.s_sparing.
1330                                                         s_spar_map[j] = NULL;
1331                                         }
1332                                 }
1333                                 map->s_partition_func = udf_get_pblock_spar15;
1334                         } else if (!strncmp(upm2->partIdent.ident,
1335                                                 UDF_ID_METADATA,
1336                                                 strlen(UDF_ID_METADATA))) {
1337                                 struct udf_meta_data *mdata =
1338                                         &map->s_type_specific.s_metadata;
1339                                 struct metadataPartitionMap *mdm =
1340                                                 (struct metadataPartitionMap *)
1341                                                 &(lvd->partitionMaps[offset]);
1342                                 udf_debug("Parsing Logical vol part %d "
1343                                         "type %d  id=%s\n", i, type,
1344                                         UDF_ID_METADATA);
1345
1346                                 map->s_partition_type = UDF_METADATA_MAP25;
1347                                 map->s_partition_func = udf_get_pblock_meta25;
1348
1349                                 mdata->s_meta_file_loc   =
1350                                         le32_to_cpu(mdm->metadataFileLoc);
1351                                 mdata->s_mirror_file_loc =
1352                                         le32_to_cpu(mdm->metadataMirrorFileLoc);
1353                                 mdata->s_bitmap_file_loc =
1354                                         le32_to_cpu(mdm->metadataBitmapFileLoc);
1355                                 mdata->s_alloc_unit_size =
1356                                         le32_to_cpu(mdm->allocUnitSize);
1357                                 mdata->s_align_unit_size =
1358                                         le16_to_cpu(mdm->alignUnitSize);
1359                                 mdata->s_dup_md_flag     =
1360                                         mdm->flags & 0x01;
1361
1362                                 udf_debug("Metadata Ident suffix=0x%x\n",
1363                                         (le16_to_cpu(
1364                                          ((__le16 *)
1365                                               mdm->partIdent.identSuffix)[0])));
1366                                 udf_debug("Metadata part num=%d\n",
1367                                         le16_to_cpu(mdm->partitionNum));
1368                                 udf_debug("Metadata part alloc unit size=%d\n",
1369                                         le32_to_cpu(mdm->allocUnitSize));
1370                                 udf_debug("Metadata file loc=%d\n",
1371                                         le32_to_cpu(mdm->metadataFileLoc));
1372                                 udf_debug("Mirror file loc=%d\n",
1373                                        le32_to_cpu(mdm->metadataMirrorFileLoc));
1374                                 udf_debug("Bitmap file loc=%d\n",
1375                                        le32_to_cpu(mdm->metadataBitmapFileLoc));
1376                                 udf_debug("Duplicate Flag: %d %d\n",
1377                                         mdata->s_dup_md_flag, mdm->flags);
1378                         } else {
1379                                 udf_debug("Unknown ident: %s\n",
1380                                           upm2->partIdent.ident);
1381                                 continue;
1382                         }
1383                         map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1384                         map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1385                 }
1386                 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1387                           i, map->s_partition_num, type,
1388                           map->s_volumeseqnum);
1389         }
1390
1391         if (fileset) {
1392                 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1393
1394                 *fileset = lelb_to_cpu(la->extLocation);
1395                 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1396                           "partition=%d\n", fileset->logicalBlockNum,
1397                           fileset->partitionReferenceNum);
1398         }
1399         if (lvd->integritySeqExt.extLength)
1400                 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1401
1402 out_bh:
1403         brelse(bh);
1404         return ret;
1405 }
1406
1407 /*
1408  * udf_load_logicalvolint
1409  *
1410  */
1411 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1412 {
1413         struct buffer_head *bh = NULL;
1414         uint16_t ident;
1415         struct udf_sb_info *sbi = UDF_SB(sb);
1416         struct logicalVolIntegrityDesc *lvid;
1417
1418         while (loc.extLength > 0 &&
1419                (bh = udf_read_tagged(sb, loc.extLocation,
1420                                      loc.extLocation, &ident)) &&
1421                ident == TAG_IDENT_LVID) {
1422                 sbi->s_lvid_bh = bh;
1423                 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1424
1425                 if (lvid->nextIntegrityExt.extLength)
1426                         udf_load_logicalvolint(sb,
1427                                 leea_to_cpu(lvid->nextIntegrityExt));
1428
1429                 if (sbi->s_lvid_bh != bh)
1430                         brelse(bh);
1431                 loc.extLength -= sb->s_blocksize;
1432                 loc.extLocation++;
1433         }
1434         if (sbi->s_lvid_bh != bh)
1435                 brelse(bh);
1436 }
1437
1438 /*
1439  * udf_process_sequence
1440  *
1441  * PURPOSE
1442  *      Process a main/reserve volume descriptor sequence.
1443  *
1444  * PRE-CONDITIONS
1445  *      sb                      Pointer to _locked_ superblock.
1446  *      block                   First block of first extent of the sequence.
1447  *      lastblock               Lastblock of first extent of the sequence.
1448  *
1449  * HISTORY
1450  *      July 1, 1997 - Andrew E. Mileski
1451  *      Written, tested, and released.
1452  */
1453 static noinline int udf_process_sequence(struct super_block *sb, long block,
1454                                 long lastblock, struct kernel_lb_addr *fileset)
1455 {
1456         struct buffer_head *bh = NULL;
1457         struct udf_vds_record vds[VDS_POS_LENGTH];
1458         struct udf_vds_record *curr;
1459         struct generic_desc *gd;
1460         struct volDescPtr *vdp;
1461         int done = 0;
1462         uint32_t vdsn;
1463         uint16_t ident;
1464         long next_s = 0, next_e = 0;
1465
1466         memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1467
1468         /*
1469          * Read the main descriptor sequence and find which descriptors
1470          * are in it.
1471          */
1472         for (; (!done && block <= lastblock); block++) {
1473
1474                 bh = udf_read_tagged(sb, block, block, &ident);
1475                 if (!bh) {
1476                         printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1477                                "sequence is corrupted or we could not read "
1478                                "it.\n", (unsigned long long)block);
1479                         return 1;
1480                 }
1481
1482                 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1483                 gd = (struct generic_desc *)bh->b_data;
1484                 vdsn = le32_to_cpu(gd->volDescSeqNum);
1485                 switch (ident) {
1486                 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1487                         curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1488                         if (vdsn >= curr->volDescSeqNum) {
1489                                 curr->volDescSeqNum = vdsn;
1490                                 curr->block = block;
1491                         }
1492                         break;
1493                 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1494                         curr = &vds[VDS_POS_VOL_DESC_PTR];
1495                         if (vdsn >= curr->volDescSeqNum) {
1496                                 curr->volDescSeqNum = vdsn;
1497                                 curr->block = block;
1498
1499                                 vdp = (struct volDescPtr *)bh->b_data;
1500                                 next_s = le32_to_cpu(
1501                                         vdp->nextVolDescSeqExt.extLocation);
1502                                 next_e = le32_to_cpu(
1503                                         vdp->nextVolDescSeqExt.extLength);
1504                                 next_e = next_e >> sb->s_blocksize_bits;
1505                                 next_e += next_s;
1506                         }
1507                         break;
1508                 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1509                         curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1510                         if (vdsn >= curr->volDescSeqNum) {
1511                                 curr->volDescSeqNum = vdsn;
1512                                 curr->block = block;
1513                         }
1514                         break;
1515                 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1516                         curr = &vds[VDS_POS_PARTITION_DESC];
1517                         if (!curr->block)
1518                                 curr->block = block;
1519                         break;
1520                 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1521                         curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1522                         if (vdsn >= curr->volDescSeqNum) {
1523                                 curr->volDescSeqNum = vdsn;
1524                                 curr->block = block;
1525                         }
1526                         break;
1527                 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1528                         curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1529                         if (vdsn >= curr->volDescSeqNum) {
1530                                 curr->volDescSeqNum = vdsn;
1531                                 curr->block = block;
1532                         }
1533                         break;
1534                 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1535                         vds[VDS_POS_TERMINATING_DESC].block = block;
1536                         if (next_e) {
1537                                 block = next_s;
1538                                 lastblock = next_e;
1539                                 next_s = next_e = 0;
1540                         } else
1541                                 done = 1;
1542                         break;
1543                 }
1544                 brelse(bh);
1545         }
1546         /*
1547          * Now read interesting descriptors again and process them
1548          * in a suitable order
1549          */
1550         if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1551                 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1552                 return 1;
1553         }
1554         if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1555                 return 1;
1556
1557         if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1558             vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1559                 return 1;
1560
1561         if (vds[VDS_POS_PARTITION_DESC].block) {
1562                 /*
1563                  * We rescan the whole descriptor sequence to find
1564                  * partition descriptor blocks and process them.
1565                  */
1566                 for (block = vds[VDS_POS_PARTITION_DESC].block;
1567                      block < vds[VDS_POS_TERMINATING_DESC].block;
1568                      block++)
1569                         if (udf_load_partdesc(sb, block))
1570                                 return 1;
1571         }
1572
1573         return 0;
1574 }
1575
1576 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1577                              struct kernel_lb_addr *fileset)
1578 {
1579         struct anchorVolDescPtr *anchor;
1580         long main_s, main_e, reserve_s, reserve_e;
1581
1582         anchor = (struct anchorVolDescPtr *)bh->b_data;
1583
1584         /* Locate the main sequence */
1585         main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1586         main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1587         main_e = main_e >> sb->s_blocksize_bits;
1588         main_e += main_s;
1589
1590         /* Locate the reserve sequence */
1591         reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1592         reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1593         reserve_e = reserve_e >> sb->s_blocksize_bits;
1594         reserve_e += reserve_s;
1595
1596         /* Process the main & reserve sequences */
1597         /* responsible for finding the PartitionDesc(s) */
1598         if (!udf_process_sequence(sb, main_s, main_e, fileset))
1599                 return 1;
1600         return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1601 }
1602
1603 /*
1604  * Check whether there is an anchor block in the given block and
1605  * load Volume Descriptor Sequence if so.
1606  */
1607 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1608                                   struct kernel_lb_addr *fileset)
1609 {
1610         struct buffer_head *bh;
1611         uint16_t ident;
1612         int ret;
1613
1614         if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1615             udf_fixed_to_variable(block) >=
1616             sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1617                 return 0;
1618
1619         bh = udf_read_tagged(sb, block, block, &ident);
1620         if (!bh)
1621                 return 0;
1622         if (ident != TAG_IDENT_AVDP) {
1623                 brelse(bh);
1624                 return 0;
1625         }
1626         ret = udf_load_sequence(sb, bh, fileset);
1627         brelse(bh);
1628         return ret;
1629 }
1630
1631 /* Search for an anchor volume descriptor pointer */
1632 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1633                                  struct kernel_lb_addr *fileset)
1634 {
1635         sector_t last[6];
1636         int i;
1637         struct udf_sb_info *sbi = UDF_SB(sb);
1638         int last_count = 0;
1639
1640         /* First try user provided anchor */
1641         if (sbi->s_anchor) {
1642                 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1643                         return lastblock;
1644         }
1645         /*
1646          * according to spec, anchor is in either:
1647          *     block 256
1648          *     lastblock-256
1649          *     lastblock
1650          *  however, if the disc isn't closed, it could be 512.
1651          */
1652         if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1653                 return lastblock;
1654         /*
1655          * The trouble is which block is the last one. Drives often misreport
1656          * this so we try various possibilities.
1657          */
1658         last[last_count++] = lastblock;
1659         if (lastblock >= 1)
1660                 last[last_count++] = lastblock - 1;
1661         last[last_count++] = lastblock + 1;
1662         if (lastblock >= 2)
1663                 last[last_count++] = lastblock - 2;
1664         if (lastblock >= 150)
1665                 last[last_count++] = lastblock - 150;
1666         if (lastblock >= 152)
1667                 last[last_count++] = lastblock - 152;
1668
1669         for (i = 0; i < last_count; i++) {
1670                 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1671                                 sb->s_blocksize_bits)
1672                         continue;
1673                 if (udf_check_anchor_block(sb, last[i], fileset))
1674                         return last[i];
1675                 if (last[i] < 256)
1676                         continue;
1677                 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1678                         return last[i];
1679         }
1680
1681         /* Finally try block 512 in case media is open */
1682         if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1683                 return last[0];
1684         return 0;
1685 }
1686
1687 /*
1688  * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1689  * area specified by it. The function expects sbi->s_lastblock to be the last
1690  * block on the media.
1691  *
1692  * Return 1 if ok, 0 if not found.
1693  *
1694  */
1695 static int udf_find_anchor(struct super_block *sb,
1696                            struct kernel_lb_addr *fileset)
1697 {
1698         sector_t lastblock;
1699         struct udf_sb_info *sbi = UDF_SB(sb);
1700
1701         lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1702         if (lastblock)
1703                 goto out;
1704
1705         /* No anchor found? Try VARCONV conversion of block numbers */
1706         UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1707         /* Firstly, we try to not convert number of the last block */
1708         lastblock = udf_scan_anchors(sb,
1709                                 udf_variable_to_fixed(sbi->s_last_block),
1710                                 fileset);
1711         if (lastblock)
1712                 goto out;
1713
1714         /* Secondly, we try with converted number of the last block */
1715         lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1716         if (!lastblock) {
1717                 /* VARCONV didn't help. Clear it. */
1718                 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1719                 return 0;
1720         }
1721 out:
1722         sbi->s_last_block = lastblock;
1723         return 1;
1724 }
1725
1726 /*
1727  * Check Volume Structure Descriptor, find Anchor block and load Volume
1728  * Descriptor Sequence
1729  */
1730 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1731                         int silent, struct kernel_lb_addr *fileset)
1732 {
1733         struct udf_sb_info *sbi = UDF_SB(sb);
1734         loff_t nsr_off;
1735
1736         if (!sb_set_blocksize(sb, uopt->blocksize)) {
1737                 if (!silent)
1738                         printk(KERN_WARNING "UDF-fs: Bad block size\n");
1739                 return 0;
1740         }
1741         sbi->s_last_block = uopt->lastblock;
1742         if (!uopt->novrs) {
1743                 /* Check that it is NSR02 compliant */
1744                 nsr_off = udf_check_vsd(sb);
1745                 if (!nsr_off) {
1746                         if (!silent)
1747                                 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1748                         return 0;
1749                 }
1750                 if (nsr_off == -1)
1751                         udf_debug("Failed to read byte 32768. Assuming open "
1752                                   "disc. Skipping validity check\n");
1753                 if (!sbi->s_last_block)
1754                         sbi->s_last_block = udf_get_last_block(sb);
1755         } else {
1756                 udf_debug("Validity check skipped because of novrs option\n");
1757         }
1758
1759         /* Look for anchor block and load Volume Descriptor Sequence */
1760         sbi->s_anchor = uopt->anchor;
1761         if (!udf_find_anchor(sb, fileset)) {
1762                 if (!silent)
1763                         printk(KERN_WARNING "UDF-fs: No anchor found\n");
1764                 return 0;
1765         }
1766         return 1;
1767 }
1768
1769 static void udf_open_lvid(struct super_block *sb)
1770 {
1771         struct udf_sb_info *sbi = UDF_SB(sb);
1772         struct buffer_head *bh = sbi->s_lvid_bh;
1773         struct logicalVolIntegrityDesc *lvid;
1774         struct logicalVolIntegrityDescImpUse *lvidiu;
1775
1776         if (!bh)
1777                 return;
1778
1779         mutex_lock(&sbi->s_alloc_mutex);
1780         lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1781         lvidiu = udf_sb_lvidiu(sbi);
1782
1783         lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1784         lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1785         udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1786                                 CURRENT_TIME);
1787         lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1788
1789         lvid->descTag.descCRC = cpu_to_le16(
1790                 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1791                         le16_to_cpu(lvid->descTag.descCRCLength)));
1792
1793         lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1794         mark_buffer_dirty(bh);
1795         sbi->s_lvid_dirty = 0;
1796         mutex_unlock(&sbi->s_alloc_mutex);
1797 }
1798
1799 static void udf_close_lvid(struct super_block *sb)
1800 {
1801         struct udf_sb_info *sbi = UDF_SB(sb);
1802         struct buffer_head *bh = sbi->s_lvid_bh;
1803         struct logicalVolIntegrityDesc *lvid;
1804         struct logicalVolIntegrityDescImpUse *lvidiu;
1805
1806         if (!bh)
1807                 return;
1808
1809         mutex_lock(&sbi->s_alloc_mutex);
1810         lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1811         lvidiu = udf_sb_lvidiu(sbi);
1812         lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1813         lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1814         udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1815         if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1816                 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1817         if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1818                 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1819         if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1820                 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1821         lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1822
1823         lvid->descTag.descCRC = cpu_to_le16(
1824                         crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1825                                 le16_to_cpu(lvid->descTag.descCRCLength)));
1826
1827         lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1828         mark_buffer_dirty(bh);
1829         sbi->s_lvid_dirty = 0;
1830         mutex_unlock(&sbi->s_alloc_mutex);
1831 }
1832
1833 u64 lvid_get_unique_id(struct super_block *sb)
1834 {
1835         struct buffer_head *bh;
1836         struct udf_sb_info *sbi = UDF_SB(sb);
1837         struct logicalVolIntegrityDesc *lvid;
1838         struct logicalVolHeaderDesc *lvhd;
1839         u64 uniqueID;
1840         u64 ret;
1841
1842         bh = sbi->s_lvid_bh;
1843         if (!bh)
1844                 return 0;
1845
1846         lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1847         lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1848
1849         mutex_lock(&sbi->s_alloc_mutex);
1850         ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1851         if (!(++uniqueID & 0xFFFFFFFF))
1852                 uniqueID += 16;
1853         lvhd->uniqueID = cpu_to_le64(uniqueID);
1854         mutex_unlock(&sbi->s_alloc_mutex);
1855         mark_buffer_dirty(bh);
1856
1857         return ret;
1858 }
1859
1860 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1861 {
1862         int i;
1863         int nr_groups = bitmap->s_nr_groups;
1864         int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1865                                                 nr_groups);
1866
1867         for (i = 0; i < nr_groups; i++)
1868                 if (bitmap->s_block_bitmap[i])
1869                         brelse(bitmap->s_block_bitmap[i]);
1870
1871         if (size <= PAGE_SIZE)
1872                 kfree(bitmap);
1873         else
1874                 vfree(bitmap);
1875 }
1876
1877 static void udf_free_partition(struct udf_part_map *map)
1878 {
1879         int i;
1880         struct udf_meta_data *mdata;
1881
1882         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1883                 iput(map->s_uspace.s_table);
1884         if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1885                 iput(map->s_fspace.s_table);
1886         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1887                 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1888         if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1889                 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1890         if (map->s_partition_type == UDF_SPARABLE_MAP15)
1891                 for (i = 0; i < 4; i++)
1892                         brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1893         else if (map->s_partition_type == UDF_METADATA_MAP25) {
1894                 mdata = &map->s_type_specific.s_metadata;
1895                 iput(mdata->s_metadata_fe);
1896                 mdata->s_metadata_fe = NULL;
1897
1898                 iput(mdata->s_mirror_fe);
1899                 mdata->s_mirror_fe = NULL;
1900
1901                 iput(mdata->s_bitmap_fe);
1902                 mdata->s_bitmap_fe = NULL;
1903         }
1904 }
1905
1906 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1907 {
1908         int i;
1909         int ret;
1910         struct inode *inode = NULL;
1911         struct udf_options uopt;
1912         struct kernel_lb_addr rootdir, fileset;
1913         struct udf_sb_info *sbi;
1914
1915         lock_kernel();
1916
1917         uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1918         uopt.uid = -1;
1919         uopt.gid = -1;
1920         uopt.umask = 0;
1921         uopt.fmode = UDF_INVALID_MODE;
1922         uopt.dmode = UDF_INVALID_MODE;
1923
1924         sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1925         if (!sbi) {
1926                 unlock_kernel();
1927                 return -ENOMEM;
1928         }
1929
1930         sb->s_fs_info = sbi;
1931
1932         mutex_init(&sbi->s_alloc_mutex);
1933
1934         if (!udf_parse_options((char *)options, &uopt, false))
1935                 goto error_out;
1936
1937         if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1938             uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1939                 udf_error(sb, "udf_read_super",
1940                           "utf8 cannot be combined with iocharset\n");
1941                 goto error_out;
1942         }
1943 #ifdef CONFIG_UDF_NLS
1944         if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1945                 uopt.nls_map = load_nls_default();
1946                 if (!uopt.nls_map)
1947                         uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1948                 else
1949                         udf_debug("Using default NLS map\n");
1950         }
1951 #endif
1952         if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1953                 uopt.flags |= (1 << UDF_FLAG_UTF8);
1954
1955         fileset.logicalBlockNum = 0xFFFFFFFF;
1956         fileset.partitionReferenceNum = 0xFFFF;
1957
1958         sbi->s_flags = uopt.flags;
1959         sbi->s_uid = uopt.uid;
1960         sbi->s_gid = uopt.gid;
1961         sbi->s_umask = uopt.umask;
1962         sbi->s_fmode = uopt.fmode;
1963         sbi->s_dmode = uopt.dmode;
1964         sbi->s_nls_map = uopt.nls_map;
1965         rwlock_init(&sbi->s_cred_lock);
1966
1967         if (uopt.session == 0xFFFFFFFF)
1968                 sbi->s_session = udf_get_last_session(sb);
1969         else
1970                 sbi->s_session = uopt.session;
1971
1972         udf_debug("Multi-session=%d\n", sbi->s_session);
1973
1974         /* Fill in the rest of the superblock */
1975         sb->s_op = &udf_sb_ops;
1976         sb->s_export_op = &udf_export_ops;
1977
1978         sb->s_dirt = 0;
1979         sb->s_magic = UDF_SUPER_MAGIC;
1980         sb->s_time_gran = 1000;
1981
1982         if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
1983                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1984         } else {
1985                 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
1986                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1987                 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1988                         if (!silent)
1989                                 printk(KERN_NOTICE
1990                                        "UDF-fs: Rescanning with blocksize "
1991                                        "%d\n", UDF_DEFAULT_BLOCKSIZE);
1992                         uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
1993                         ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1994                 }
1995         }
1996         if (!ret) {
1997                 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1998                 goto error_out;
1999         }
2000
2001         udf_debug("Lastblock=%d\n", sbi->s_last_block);
2002
2003         if (sbi->s_lvid_bh) {
2004                 struct logicalVolIntegrityDescImpUse *lvidiu =
2005                                                         udf_sb_lvidiu(sbi);
2006                 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2007                 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2008                 /* uint16_t maxUDFWriteRev =
2009                                 le16_to_cpu(lvidiu->maxUDFWriteRev); */
2010
2011                 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2012                         printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
2013                                         "(max is %x)\n",
2014                                le16_to_cpu(lvidiu->minUDFReadRev),
2015                                UDF_MAX_READ_VERSION);
2016                         goto error_out;
2017                 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
2018                         sb->s_flags |= MS_RDONLY;
2019
2020                 sbi->s_udfrev = minUDFWriteRev;
2021
2022                 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2023                         UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2024                 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2025                         UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2026         }
2027
2028         if (!sbi->s_partitions) {
2029                 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
2030                 goto error_out;
2031         }
2032
2033         if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2034                         UDF_PART_FLAG_READ_ONLY) {
2035                 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2036                                    "forcing readonly mount\n");
2037                 sb->s_flags |= MS_RDONLY;
2038         }
2039
2040         if (udf_find_fileset(sb, &fileset, &rootdir)) {
2041                 printk(KERN_WARNING "UDF-fs: No fileset found\n");
2042                 goto error_out;
2043         }
2044
2045         if (!silent) {
2046                 struct timestamp ts;
2047                 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2048                 udf_info("UDF: Mounting volume '%s', "
2049                          "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2050                          sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2051                          ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2052         }
2053         if (!(sb->s_flags & MS_RDONLY))
2054                 udf_open_lvid(sb);
2055
2056         /* Assign the root inode */
2057         /* assign inodes by physical block number */
2058         /* perhaps it's not extensible enough, but for now ... */
2059         inode = udf_iget(sb, &rootdir);
2060         if (!inode) {
2061                 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2062                                 "partition=%d\n",
2063                        rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2064                 goto error_out;
2065         }
2066
2067         /* Allocate a dentry for the root inode */
2068         sb->s_root = d_alloc_root(inode);
2069         if (!sb->s_root) {
2070                 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
2071                 iput(inode);
2072                 goto error_out;
2073         }
2074         sb->s_maxbytes = MAX_LFS_FILESIZE;
2075         unlock_kernel();
2076         return 0;
2077
2078 error_out:
2079         if (sbi->s_vat_inode)
2080                 iput(sbi->s_vat_inode);
2081         if (sbi->s_partitions)
2082                 for (i = 0; i < sbi->s_partitions; i++)
2083                         udf_free_partition(&sbi->s_partmaps[i]);
2084 #ifdef CONFIG_UDF_NLS
2085         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2086                 unload_nls(sbi->s_nls_map);
2087 #endif
2088         if (!(sb->s_flags & MS_RDONLY))
2089                 udf_close_lvid(sb);
2090         brelse(sbi->s_lvid_bh);
2091
2092         kfree(sbi->s_partmaps);
2093         kfree(sbi);
2094         sb->s_fs_info = NULL;
2095
2096         unlock_kernel();
2097         return -EINVAL;
2098 }
2099
2100 static void udf_error(struct super_block *sb, const char *function,
2101                       const char *fmt, ...)
2102 {
2103         va_list args;
2104
2105         if (!(sb->s_flags & MS_RDONLY)) {
2106                 /* mark sb error */
2107                 sb->s_dirt = 1;
2108         }
2109         va_start(args, fmt);
2110         vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2111         va_end(args);
2112         printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
2113                 sb->s_id, function, error_buf);
2114 }
2115
2116 void udf_warning(struct super_block *sb, const char *function,
2117                  const char *fmt, ...)
2118 {
2119         va_list args;
2120
2121         va_start(args, fmt);
2122         vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2123         va_end(args);
2124         printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
2125                sb->s_id, function, error_buf);
2126 }
2127
2128 static void udf_put_super(struct super_block *sb)
2129 {
2130         int i;
2131         struct udf_sb_info *sbi;
2132
2133         sbi = UDF_SB(sb);
2134
2135         lock_kernel();
2136
2137         if (sbi->s_vat_inode)
2138                 iput(sbi->s_vat_inode);
2139         if (sbi->s_partitions)
2140                 for (i = 0; i < sbi->s_partitions; i++)
2141                         udf_free_partition(&sbi->s_partmaps[i]);
2142 #ifdef CONFIG_UDF_NLS
2143         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2144                 unload_nls(sbi->s_nls_map);
2145 #endif
2146         if (!(sb->s_flags & MS_RDONLY))
2147                 udf_close_lvid(sb);
2148         brelse(sbi->s_lvid_bh);
2149         kfree(sbi->s_partmaps);
2150         kfree(sb->s_fs_info);
2151         sb->s_fs_info = NULL;
2152
2153         unlock_kernel();
2154 }
2155
2156 static int udf_sync_fs(struct super_block *sb, int wait)
2157 {
2158         struct udf_sb_info *sbi = UDF_SB(sb);
2159
2160         mutex_lock(&sbi->s_alloc_mutex);
2161         if (sbi->s_lvid_dirty) {
2162                 /*
2163                  * Blockdevice will be synced later so we don't have to submit
2164                  * the buffer for IO
2165                  */
2166                 mark_buffer_dirty(sbi->s_lvid_bh);
2167                 sb->s_dirt = 0;
2168                 sbi->s_lvid_dirty = 0;
2169         }
2170         mutex_unlock(&sbi->s_alloc_mutex);
2171
2172         return 0;
2173 }
2174
2175 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2176 {
2177         struct super_block *sb = dentry->d_sb;
2178         struct udf_sb_info *sbi = UDF_SB(sb);
2179         struct logicalVolIntegrityDescImpUse *lvidiu;
2180         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2181
2182         if (sbi->s_lvid_bh != NULL)
2183                 lvidiu = udf_sb_lvidiu(sbi);
2184         else
2185                 lvidiu = NULL;
2186
2187         buf->f_type = UDF_SUPER_MAGIC;
2188         buf->f_bsize = sb->s_blocksize;
2189         buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2190         buf->f_bfree = udf_count_free(sb);
2191         buf->f_bavail = buf->f_bfree;
2192         buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2193                                           le32_to_cpu(lvidiu->numDirs)) : 0)
2194                         + buf->f_bfree;
2195         buf->f_ffree = buf->f_bfree;
2196         buf->f_namelen = UDF_NAME_LEN - 2;
2197         buf->f_fsid.val[0] = (u32)id;
2198         buf->f_fsid.val[1] = (u32)(id >> 32);
2199
2200         return 0;
2201 }
2202
2203 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2204                                           struct udf_bitmap *bitmap)
2205 {
2206         struct buffer_head *bh = NULL;
2207         unsigned int accum = 0;
2208         int index;
2209         int block = 0, newblock;
2210         struct kernel_lb_addr loc;
2211         uint32_t bytes;
2212         uint8_t *ptr;
2213         uint16_t ident;
2214         struct spaceBitmapDesc *bm;
2215
2216         lock_kernel();
2217
2218         loc.logicalBlockNum = bitmap->s_extPosition;
2219         loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2220         bh = udf_read_ptagged(sb, &loc, 0, &ident);
2221
2222         if (!bh) {
2223                 printk(KERN_ERR "udf: udf_count_free failed\n");
2224                 goto out;
2225         } else if (ident != TAG_IDENT_SBD) {
2226                 brelse(bh);
2227                 printk(KERN_ERR "udf: udf_count_free failed\n");
2228                 goto out;
2229         }
2230
2231         bm = (struct spaceBitmapDesc *)bh->b_data;
2232         bytes = le32_to_cpu(bm->numOfBytes);
2233         index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2234         ptr = (uint8_t *)bh->b_data;
2235
2236         while (bytes > 0) {
2237                 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2238                 accum += bitmap_weight((const unsigned long *)(ptr + index),
2239                                         cur_bytes * 8);
2240                 bytes -= cur_bytes;
2241                 if (bytes) {
2242                         brelse(bh);
2243                         newblock = udf_get_lb_pblock(sb, &loc, ++block);
2244                         bh = udf_tread(sb, newblock);
2245                         if (!bh) {
2246                                 udf_debug("read failed\n");
2247                                 goto out;
2248                         }
2249                         index = 0;
2250                         ptr = (uint8_t *)bh->b_data;
2251                 }
2252         }
2253         brelse(bh);
2254
2255 out:
2256         unlock_kernel();
2257
2258         return accum;
2259 }
2260
2261 static unsigned int udf_count_free_table(struct super_block *sb,
2262                                          struct inode *table)
2263 {
2264         unsigned int accum = 0;
2265         uint32_t elen;
2266         struct kernel_lb_addr eloc;
2267         int8_t etype;
2268         struct extent_position epos;
2269
2270         lock_kernel();
2271
2272         epos.block = UDF_I(table)->i_location;
2273         epos.offset = sizeof(struct unallocSpaceEntry);
2274         epos.bh = NULL;
2275
2276         while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2277                 accum += (elen >> table->i_sb->s_blocksize_bits);
2278
2279         brelse(epos.bh);
2280
2281         unlock_kernel();
2282
2283         return accum;
2284 }
2285
2286 static unsigned int udf_count_free(struct super_block *sb)
2287 {
2288         unsigned int accum = 0;
2289         struct udf_sb_info *sbi;
2290         struct udf_part_map *map;
2291
2292         sbi = UDF_SB(sb);
2293         if (sbi->s_lvid_bh) {
2294                 struct logicalVolIntegrityDesc *lvid =
2295                         (struct logicalVolIntegrityDesc *)
2296                         sbi->s_lvid_bh->b_data;
2297                 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2298                         accum = le32_to_cpu(
2299                                         lvid->freeSpaceTable[sbi->s_partition]);
2300                         if (accum == 0xFFFFFFFF)
2301                                 accum = 0;
2302                 }
2303         }
2304
2305         if (accum)
2306                 return accum;
2307
2308         map = &sbi->s_partmaps[sbi->s_partition];
2309         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2310                 accum += udf_count_free_bitmap(sb,
2311                                                map->s_uspace.s_bitmap);
2312         }
2313         if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2314                 accum += udf_count_free_bitmap(sb,
2315                                                map->s_fspace.s_bitmap);
2316         }
2317         if (accum)
2318                 return accum;
2319
2320         if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2321                 accum += udf_count_free_table(sb,
2322                                               map->s_uspace.s_table);
2323         }
2324         if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2325                 accum += udf_count_free_table(sb,
2326                                               map->s_fspace.s_table);
2327         }
2328
2329         return accum;
2330 }