fs/hpfs/super.c

   1 /*
   2  *  linux/fs/hpfs/super.c
   3  *
   4  *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
   5  *
   6  *  mouning, unmounting, error handling
   7  */
   8
   9 #include "hpfs_fn.h"
  10 #include <linux/module.h>
  11
  12 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
  13
  14 static void mark_dirty(struct super_block *s)
  15 {
  16         if (s->s_hpfs_chkdsk && !(s->s_flags & MS_RDONLY)) {
  17                 struct buffer_head *bh;
  18                 struct hpfs_spare_block *sb;
  19                 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
  20                         sb->dirty = 1;
  21                         sb->old_wrote = 0;
  22                         mark_buffer_dirty(bh, 1);
  23                         brelse(bh);
  24                 }
  25         }
  26 }
  27
  28 /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there
  29    were errors) */
  30
  31 static void unmark_dirty(struct super_block *s)
  32 {
  33         struct buffer_head *bh;
  34         struct hpfs_spare_block *sb;
  35         if (s->s_flags & MS_RDONLY) return;
  36         if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
  37                 sb->dirty = s->s_hpfs_chkdsk > 1 - s->s_hpfs_was_error;
  38                 sb->old_wrote = s->s_hpfs_chkdsk >= 2 && !s->s_hpfs_was_error;
  39                 mark_buffer_dirty(bh, 1);
  40                 brelse(bh);
  41         }
  42 }
  43
  44 /* Filesystem error... */
  45
  46 #define ERR_BUF_SIZE 1024
  47
  48 void hpfs_error(struct super_block *s, char *m,...)
  49 {
  50         char *buf;
  51         va_list l;
  52         va_start(l, m);
  53         if (!(buf = kmalloc(ERR_BUF_SIZE, GFP_KERNEL)))
  54                 printk("HPFS: No memory for error message '%s'\n",m);
  55         else if (vsprintf(buf, m, l) >= ERR_BUF_SIZE)
  56                 printk("HPFS: Grrrr... Kernel memory corrupted ... going on, but it'll crash very soon :-(\n");
  57         printk("HPFS: filesystem error: ");
  58         if (buf) printk("%s", buf);
  59         else printk("%s\n",m);
  60         if (!s->s_hpfs_was_error) {
  61                 if (s->s_hpfs_err == 2) {
  62                         printk("; crashing the system because you wanted it\n");
  63                         mark_dirty(s);
  64                         panic("HPFS panic");
  65                 } else if (s->s_hpfs_err == 1) {
  66                         if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n");
  67                         else {
  68                                 printk("; remounting read-only\n");
  69                                 mark_dirty(s);
  70                                 s->s_flags |= MS_RDONLY;
  71                         }
  72                 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n");
  73                 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
  74         } else printk("\n");
  75         if (buf) kfree(buf);
  76         s->s_hpfs_was_error = 1;
  77 }
  78
  79 /*
  80  * A little trick to detect cycles in many hpfs structures and don't let the
  81  * kernel crash on corrupted filesystem. When first called, set c2 to 0.
  82  *
  83  * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories
  84  * nested each in other, chkdsk locked up happilly.
  85  */
  86
  87 int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
  88                 char *msg)
  89 {
  90         if (*c2 && *c1 == key) {
  91                 hpfs_error(s, "cycle detected on key %08x in %s", key, msg);
  92                 return 1;
  93         }
  94         (*c2)++;
  95         if (!((*c2 - 1) & *c2)) *c1 = key;
  96         return 0;
  97 }
  98
  99 void hpfs_put_super(struct super_block *s)
 100 {
 101         if (s->s_hpfs_cp_table) kfree(s->s_hpfs_cp_table);
 102         if (s->s_hpfs_bmp_dir) kfree(s->s_hpfs_bmp_dir);
 103         unmark_dirty(s);
 104         s->s_dev = 0;
 105         MOD_DEC_USE_COUNT;
 106 }
 107
 108 static unsigned count_one_bitmap(struct super_block *s, secno secno)
 109 {
 110         struct quad_buffer_head qbh;
 111         unsigned *bits;
 112         unsigned i, count;
 113         if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0;
 114         count = 0;
 115         for (i = 0; i < 2048 / sizeof(unsigned); i++) {
 116                 unsigned b;
 117                 for (b = bits[i]; b; b>>=1) count += b & 1;
 118         }
 119         hpfs_brelse4(&qbh);
 120         return count;
 121 }
 122
 123 static unsigned count_bitmaps(struct super_block *s)
 124 {
 125         unsigned n, count, n_bands;
 126         n_bands = (s->s_hpfs_fs_size + 0x3fff) >> 14;
 127         count = 0;
 128         for (n = 0; n < n_bands; n++)
 129                 count += count_one_bitmap(s, s->s_hpfs_bmp_dir[n]);
 130         return count;
 131 }
 132
 133 int hpfs_statfs(struct super_block *s, struct statfs *buf, int bufsiz)
 134 {
 135         struct statfs tmp;
 136         /*if (s->s_hpfs_n_free == -1) {*/
 137                 s->s_hpfs_n_free = count_bitmaps(s);
 138                 s->s_hpfs_n_free_dnodes = count_one_bitmap(s, s->s_hpfs_dmap);
 139         /*}*/
 140         tmp.f_type = s->s_magic;
 141         tmp.f_bsize = 512;
 142         tmp.f_blocks = s->s_hpfs_fs_size;
 143         tmp.f_bfree = s->s_hpfs_n_free;
 144         tmp.f_bavail = s->s_hpfs_n_free;
 145         tmp.f_files = s->s_hpfs_dirband_size / 4;
 146         tmp.f_ffree = s->s_hpfs_n_free_dnodes;
 147         tmp.f_namelen = 254;
 148         return copy_to_user(buf, &tmp, bufsiz) ? -EFAULT : 0;
 149 }
 150
 151 /* Super operations */
 152
 153 static const struct super_operations hpfs_sops =
 154 {
 155         hpfs_read_inode,                /* read_inode */
 156         NULL,                           /* write_inode */
 157         NULL,                           /* put_inode */
 158         hpfs_delete_inode,              /* delete inode */
 159         hpfs_notify_change,             /* notify_change */
 160         hpfs_put_super,                 /* put_super */
 161         NULL,                           /* write_super */
 162         hpfs_statfs,                    /* statfs */
 163         hpfs_remount_fs,                /* remount_fs */
 164         NULL,                           /* clear inode */
 165         NULL,                           /* umount_begin */
 166 };
 167
 168 /*
 169  * A tiny parser for option strings, stolen from dosfs.
 170  *
 171  * Stolen again from read-only hpfs.
 172  */
 173
 174 int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask,
 175                int *lowercase, int *conv, int *eas, int *chk, int *errs,
 176                int *chkdsk, int *timeshift)
 177 {
 178         char *p, *rhs;
 179
 180         if (!opts)
 181                 return 1;
 182
 183         /*printk("Parsing opts: '%s'\n",opts);*/
 184
 185         for (p = strtok(opts, ","); p != 0; p = strtok(0, ",")) {
 186                 if ((rhs = strchr(p, '=')) != 0)
 187                         *rhs++ = '\0';
 188                 if (!strcmp(p, "help")) return 2;
 189                 if (!strcmp(p, "uid")) {
 190                         if (!rhs || !*rhs)
 191                                 return 0;
 192                         *uid = simple_strtoul(rhs, &rhs, 0);
 193                         if (*rhs)
 194                                 return 0;
 195                 }
 196                 else if (!strcmp(p, "gid")) {
 197                         if (!rhs || !*rhs)
 198                                 return 0;
 199                         *gid = simple_strtoul(rhs, &rhs, 0);
 200                         if (*rhs)
 201                                 return 0;
 202                 }
 203                 else if (!strcmp(p, "umask")) {
 204                         if (!rhs || !*rhs)
 205                                 return 0;
 206                         *umask = simple_strtoul(rhs, &rhs, 8);
 207                         if (*rhs)
 208                                 return 0;
 209                 }
 210                 else if (!strcmp(p, "timeshift")) {
 211                         int m = 1;
 212                         if (!rhs || !*rhs)
 213                                 return 0;
 214                         if (*rhs == '-') m = -1;
 215                         if (*rhs == '+' || *rhs == '-') rhs++;
 216                         *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
 217                         if (*rhs)
 218                                 return 0;
 219                 }
 220                 else if (!strcmp(p, "case")) {
 221                         if (!strcmp(rhs, "lower"))
 222                                 *lowercase = 1;
 223                         else if (!strcmp(rhs, "asis"))
 224                                 *lowercase = 0;
 225                         else
 226                                 return 0;
 227                 }
 228                 else if (!strcmp(p, "conv")) {
 229                         if (!strcmp(rhs, "binary"))
 230                                 *conv = CONV_BINARY;
 231                         else if (!strcmp(rhs, "text"))
 232                                 *conv = CONV_TEXT;
 233                         else if (!strcmp(rhs, "auto"))
 234                                 *conv = CONV_AUTO;
 235                         else
 236                                 return 0;
 237                 }
 238                 else if (!strcmp(p, "check")) {
 239                         if (!strcmp(rhs, "none"))
 240                                 *chk = 0;
 241                         else if (!strcmp(rhs, "normal"))
 242                                 *chk = 1;
 243                         else if (!strcmp(rhs, "strict"))
 244                                 *chk = 2;
 245                         else
 246                                 return 0;
 247                 }
 248                 else if (!strcmp(p, "errors")) {
 249                         if (!strcmp(rhs, "continue"))
 250                                 *errs = 0;
 251                         else if (!strcmp(rhs, "remount-ro"))
 252                                 *errs = 1;
 253                         else if (!strcmp(rhs, "panic"))
 254                                 *errs = 2;
 255                         else
 256                                 return 0;
 257                 }
 258                 else if (!strcmp(p, "eas")) {
 259                         if (!strcmp(rhs, "no"))
 260                                 *eas = 0;
 261                         else if (!strcmp(rhs, "ro"))
 262                                 *eas = 1;
 263                         else if (!strcmp(rhs, "rw"))
 264                                 *eas = 2;
 265                         else
 266                                 return 0;
 267                 }
 268                 else if (!strcmp(p, "chkdsk")) {
 269                         if (!strcmp(rhs, "no"))
 270                                 *chkdsk = 0;
 271                         else if (!strcmp(rhs, "errors"))
 272                                 *chkdsk = 1;
 273                         else if (!strcmp(rhs, "always"))
 274                                 *chkdsk = 2;
 275                         else
 276                                 return 0;
 277                 }
 278                 else
 279                         return 0;
 280         }
 281         return 1;
 282 }
 283
 284 static inline void hpfs_help()
 285 {
 286         printk("\n\
 287 HPFS filesystem options:\n\
 288       help              do not mount and display this text\n\
 289       uid=xxx           set uid of files that don't have uid specified in eas\n\
 290       gid=xxx           set gid of files that don't have gid specified in eas\n\
 291       umask=xxx         set mode of files that don't have mode specified in eas\n\
 292       case=lower        lowercase all files\n\
 293       case=asis         do not lowercase files (default)\n\
 294       conv=binary       do not convert CR/LF -> LF (default)\n\
 295       conv=auto         convert only files with known text extensions\n\
 296       conv=text         convert all files\n\
 297       check=none        no fs checks - kernel may crash on corrupted filesystem\n\
 298       check=normal      do some checks - it should not crash (default)\n\
 299       check=strict      do extra time-consuming checks, used for debugging\n\
 300       errors=continue   continue on errors\n\
 301       errors=remount-ro remount read-only if errors found (default)\n\
 302       errors=panic      panic on errors\n\
 303       chkdsk=no         do not mark fs for chkdsking even if there were errors\n\
 304       chkdsk=errors     mark fs dirty if errors found (default)\n\
 305       chkdsk=always     always mark fs dirty - used for debugging\n\
 306       eas=no            ignore extended attributes\n\
 307       eas=ro            read but do not write extended attributes\n\
 308       eas=rw            r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
 309       timeshift=nnn     add nnn seconds to file times\n\
 310 \n");
 311 }
 312
 313 int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
 314 {
 315         uid_t uid;
 316         gid_t gid;
 317         umode_t umask;
 318         int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
 319         int o;
 320
 321         *flags |= MS_NOATIME;
 322
 323         uid = s->s_hpfs_uid; gid = s->s_hpfs_gid;
 324         umask = 0777 & ~s->s_hpfs_mode;
 325         lowercase = s->s_hpfs_lowercase; conv = s->s_hpfs_conv;
 326         eas = s->s_hpfs_eas; chk = s->s_hpfs_chk; chkdsk = s->s_hpfs_chkdsk;
 327         errs = s->s_hpfs_err; timeshift = s->s_hpfs_timeshift;
 328
 329         if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv,
 330             &eas, &chk, &errs, &chkdsk, &timeshift))) {
 331                 printk("HPFS: bad mount options.\n");
 332                 return 1;
 333         }
 334         if (o == 2) {
 335                 hpfs_help();
 336                 return 1;
 337         }
 338         if (timeshift != s->s_hpfs_timeshift) {
 339                 printk("HPFS: timeshift can't be changed using remount.\n");
 340                 return 1;
 341         }
 342
 343         unmark_dirty(s);
 344
 345         s->s_hpfs_uid = uid; s->s_hpfs_gid = gid;
 346         s->s_hpfs_mode = 0777 & ~umask;
 347         s->s_hpfs_lowercase = lowercase; s->s_hpfs_conv = conv;
 348         s->s_hpfs_eas = eas; s->s_hpfs_chk = chk; s->s_hpfs_chkdsk = chkdsk;
 349         s->s_hpfs_err = errs; s->s_hpfs_timeshift = timeshift;
 350
 351         if (!(*flags & MS_RDONLY)) mark_dirty(s);
 352
 353         return 0;
 354 }
 355
 356 struct super_block *hpfs_read_super(struct super_block *s, void *options,
 357                                     int silent)
 358 {
 359         kdev_t dev;
 360         struct buffer_head *bh0, *bh1, *bh2;
 361         struct hpfs_boot_block *bootblock;
 362         struct hpfs_super_block *superblock;
 363         struct hpfs_spare_block *spareblock;
 364
 365         uid_t uid;
 366         gid_t gid;
 367         umode_t umask;
 368         int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
 369
 370         dnode_secno root_dno;
 371         struct hpfs_dirent *de = NULL;
 372         struct quad_buffer_head qbh;
 373
 374         int o;
 375
 376         MOD_INC_USE_COUNT;
 377
 378         s->s_hpfs_bmp_dir = NULL;
 379         s->s_hpfs_cp_table = NULL;
 380
 381         s->s_hpfs_creation_de_lock = s->s_hpfs_rd_inode = 0;
 382         s->s_hpfs_creation_de = s->s_hpfs_iget_q = NULL;
 383
 384         uid = current->uid;
 385         gid = current->gid;
 386         umask = current->fs->umask;
 387         lowercase = 0;
 388         conv = CONV_BINARY;
 389         eas = 2;
 390         chk = 1;
 391         errs = 1;
 392         chkdsk = 1;
 393         timeshift = 0;
 394
 395         if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv,
 396             &eas, &chk, &errs, &chkdsk, &timeshift))) {
 397                 printk("HPFS: bad mount options.\n");
 398                 goto bail0;
 399         }
 400         if (o==2) {
 401                 hpfs_help();
 402                 goto bail0;
 403         }
 404
 405         /*s->s_hpfs_mounting = 1;*/
 406         lock_super(s);
 407         dev = s->s_dev;
 408         set_blocksize(dev, 512);
 409         s->s_hpfs_fs_size = -1;
 410         if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
 411         if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
 412         if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
 413
 414         /* Check magics */
 415         if (/*bootblock->magic != BB_MAGIC
 416             ||*/ superblock->magic != SB_MAGIC
 417             || spareblock->magic != SP_MAGIC) {
 418                 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
 419                 goto bail4;
 420         }
 421
 422         /* Check version */
 423         if (!(s->s_flags & MS_RDONLY) &&
 424               superblock->funcversion != 2 && superblock->funcversion != 3) {
 425                 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
 426                         (int)superblock->version, (int)superblock->funcversion);
 427                 printk("HPFS: please try recent version of HPFS driver at http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi and if it still can't understand this format, contact author - mikulas@artax.karlin.mff.cuni.cz\n");
 428                 goto bail4;
 429         }
 430
 431         s->s_flags |= MS_NOATIME;
 432
 433         /* Fill superblock stuff */
 434         s->s_magic = HPFS_SUPER_MAGIC;
 435         s->s_blocksize = 512;
 436         s->s_blocksize_bits = 9;
 437         s->s_op = (struct super_operations *) &hpfs_sops;
 438
 439         s->s_hpfs_root = superblock->root;
 440         s->s_hpfs_fs_size = superblock->n_sectors;
 441         s->s_hpfs_bitmaps = superblock->bitmaps;
 442         s->s_hpfs_dirband_start = superblock->dir_band_start;
 443         s->s_hpfs_dirband_size = superblock->n_dir_band;
 444         s->s_hpfs_dmap = superblock->dir_band_bitmap;
 445         s->s_hpfs_uid = uid;
 446         s->s_hpfs_gid = gid;
 447         s->s_hpfs_mode = 0777 & ~umask;
 448         s->s_hpfs_n_free = -1;
 449         s->s_hpfs_n_free_dnodes = -1;
 450         s->s_hpfs_lowercase = lowercase;
 451         s->s_hpfs_conv = conv;
 452         s->s_hpfs_eas = eas;
 453         s->s_hpfs_chk = chk;
 454         s->s_hpfs_chkdsk = chkdsk;
 455         s->s_hpfs_err = errs;
 456         s->s_hpfs_timeshift = timeshift;
 457         s->s_hpfs_was_error = 0;
 458         s->s_hpfs_cp_table = NULL;
 459         s->s_hpfs_c_bitmap = -1;
 460
 461         /* Load bitmap directory */
 462         if (!(s->s_hpfs_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps)))
 463                 goto bail4;
 464
 465         /* Check for general fs errors*/
 466         if (spareblock->dirty && !spareblock->old_wrote) {
 467                 if (errs == 2) {
 468                         printk("HPFS: Improperly stopped, not mounted\n");
 469                         goto bail4;
 470                 }
 471                 hpfs_error(s, "improperly stopped");
 472         }
 473
 474         if (!(s->s_flags & MS_RDONLY)) {
 475                 spareblock->dirty = 1;
 476                 spareblock->old_wrote = 0;
 477                 mark_buffer_dirty(bh2, 1);
 478         }
 479
 480         if (spareblock->hotfixes_used || spareblock->n_spares_used) {
 481                 if (errs >= 2) {
 482                         printk("HPFS: Hotfixes not supported here, try chkdsk\n");
 483                         mark_dirty(s);
 484                         goto bail4;
 485                 }
 486                 hpfs_error(s, "hotfixes not supported here, try chkdsk");
 487                 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
 488                 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
 489         }
 490         if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) {
 491                 if (errs >= 2) {
 492                         printk("HPFS: Spare dnodes used, try chkdsk\n");
 493                         mark_dirty(s);
 494                         goto bail4;
 495                 }
 496                 hpfs_error(s, "warning: spare dnodes used, try chkdsk");
 497                 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
 498         }
 499         if (chk) {
 500                 unsigned a;
 501                 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band ||
 502                     superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) {
 503                         hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
 504                                 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band);
 505                         goto bail4;
 506                 }
 507                 a = s->s_hpfs_dirband_size;
 508                 s->s_hpfs_dirband_size = 0;
 509                 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") ||
 510                     hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") ||
 511                     hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) {
 512                         mark_dirty(s);
 513                         goto bail4;
 514                 }
 515                 s->s_hpfs_dirband_size = a;
 516         } else printk("HPFS: You really don't want any checks? You are crazy...\n");
 517
 518         /* Load code page table */
 519         if (spareblock->n_code_pages)
 520                 if (!(s->s_hpfs_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir)))
 521                         printk("HPFS: Warning: code page support is disabled\n");
 522
 523         brelse(bh2);
 524         brelse(bh1);
 525         brelse(bh0);
 526
 527         hpfs_lock_iget(s, 1);
 528         s->s_root = d_alloc_root(iget(s, s->s_hpfs_root), NULL);
 529         hpfs_unlock_iget(s);
 530         unlock_super(s);
 531         if (!s->s_root || !s->s_root->d_inode) {
 532                 printk("HPFS: iget failed. Why???\n");
 533                 goto bail0;
 534         }
 535         hpfs_set_dentry_operations(s->s_root);
 536
 537         /*
 538          * find the root directory's . pointer & finish filling in the inode
 539          */
 540
 541         root_dno = hpfs_fnode_dno(s, s->s_hpfs_root);
 542         if (root_dno)
 543                 de = map_dirent(s->s_root->d_inode, root_dno, "\001\001", 2, NULL, &qbh, NULL);
 544         if (!root_dno || !de) hpfs_error(s, "unable to find root dir");
 545         else {
 546                 s->s_root->d_inode->i_atime = local_to_gmt(s, de->read_date);
 547                 s->s_root->d_inode->i_mtime = local_to_gmt(s, de->write_date);
 548                 s->s_root->d_inode->i_ctime = local_to_gmt(s, de->creation_date);
 549                 s->s_root->d_inode->i_hpfs_ea_size = de->ea_size;
 550                 s->s_root->d_inode->i_hpfs_parent_dir = s->s_root->d_inode->i_ino;
 551                 if (s->s_root->d_inode->i_size == -1) s->s_root->d_inode->i_size = 2048;
 552                 if (s->s_root->d_inode->i_blocks == -1) s->s_root->d_inode->i_blocks = 5;
 553         }
 554         if (de) hpfs_brelse4(&qbh);
 555
 556         return s;
 557
 558 bail4:  brelse(bh2);
 559 bail3:  brelse(bh1);
 560 bail2:  brelse(bh0);
 561 bail1:  unlock_super(s);
 562 bail0:  s->s_dev = 0;
 563         if (s->s_hpfs_bmp_dir) kfree(s->s_hpfs_bmp_dir);
 564         if (s->s_hpfs_cp_table) kfree(s->s_hpfs_cp_table);
 565         MOD_DEC_USE_COUNT;
 566         return NULL;
 567 }
 568
 569 struct file_system_type hpfs_fs_type = {
 570         "hpfs", FS_REQUIRES_DEV, hpfs_read_super, NULL
 571 };
 572
 573 int init_hpfs_fs(void)
 574 {
 575         return register_filesystem(&hpfs_fs_type);
 576 }
 577
 578 #ifdef MODULE
 579
 580 /*int register_symtab_from(struct symbol_table *, long *);*/
 581
 582 int init_module(void)
 583 {
 584         /*int status;
 585         if (!(status = init_hpfs_fs())) register_symtab(NULL);
 586         return status;*/
 587         return init_hpfs_fs();
 588 }
 589
 590 void cleanup_module(void)
 591 {
 592         unregister_filesystem(&hpfs_fs_type);
 593 }
 594
 595 #endif