1 /* 2 * linux/fs/hpfs/super.c 3 * 4 * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 5 * 6 * mounting, unmounting, error handling 7 */ 8 9 #include "hpfs_fn.h" 10 #include <linux/module.h> 11 #include <linux/parser.h> 12 #include <linux/init.h> 13 #include <linux/statfs.h> 14 #include <linux/magic.h> 15 #include <linux/sched.h> 16 17 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ 18 19 static void mark_dirty(struct super_block *s) 20 { 21 if (hpfs_sb(s)->sb_chkdsk && !(s->s_flags & MS_RDONLY)) { 22 struct buffer_head *bh; 23 struct hpfs_spare_block *sb; 24 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 25 sb->dirty = 1; 26 sb->old_wrote = 0; 27 mark_buffer_dirty(bh); 28 brelse(bh); 29 } 30 } 31 } 32 33 /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there 34 were errors) */ 35 36 static void unmark_dirty(struct super_block *s) 37 { 38 struct buffer_head *bh; 39 struct hpfs_spare_block *sb; 40 if (s->s_flags & MS_RDONLY) return; 41 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 42 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; 43 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; 44 mark_buffer_dirty(bh); 45 brelse(bh); 46 } 47 } 48 49 /* Filesystem error... */ 50 static char err_buf[1024]; 51 52 void hpfs_error(struct super_block *s, const char *fmt, ...) 53 { 54 va_list args; 55 56 va_start(args, fmt); 57 vsnprintf(err_buf, sizeof(err_buf), fmt, args); 58 va_end(args); 59 60 printk("HPFS: filesystem error: %s", err_buf); 61 if (!hpfs_sb(s)->sb_was_error) { 62 if (hpfs_sb(s)->sb_err == 2) { 63 printk("; crashing the system because you wanted it\n"); 64 mark_dirty(s); 65 panic("HPFS panic"); 66 } else if (hpfs_sb(s)->sb_err == 1) { 67 if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n"); 68 else { 69 printk("; remounting read-only\n"); 70 mark_dirty(s); 71 s->s_flags |= MS_RDONLY; 72 } 73 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n"); 74 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); 75 } else printk("\n"); 76 hpfs_sb(s)->sb_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 static void hpfs_put_super(struct super_block *s) 100 { 101 struct hpfs_sb_info *sbi = hpfs_sb(s); 102 kfree(sbi->sb_cp_table); 103 kfree(sbi->sb_bmp_dir); 104 unmark_dirty(s); 105 s->s_fs_info = NULL; 106 kfree(sbi); 107 } 108 109 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) 110 { 111 struct quad_buffer_head qbh; 112 unsigned *bits; 113 unsigned i, count; 114 if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0; 115 count = 0; 116 for (i = 0; i < 2048 / sizeof(unsigned); i++) { 117 unsigned b; 118 if (!bits[i]) continue; 119 for (b = bits[i]; b; b>>=1) count += b & 1; 120 } 121 hpfs_brelse4(&qbh); 122 return count; 123 } 124 125 static unsigned count_bitmaps(struct super_block *s) 126 { 127 unsigned n, count, n_bands; 128 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; 129 count = 0; 130 for (n = 0; n < n_bands; n++) 131 count += hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_bmp_dir[n]); 132 return count; 133 } 134 135 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) 136 { 137 struct super_block *s = dentry->d_sb; 138 struct hpfs_sb_info *sbi = hpfs_sb(s); 139 lock_kernel(); 140 141 /*if (sbi->sb_n_free == -1) {*/ 142 sbi->sb_n_free = count_bitmaps(s); 143 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap); 144 /*}*/ 145 buf->f_type = s->s_magic; 146 buf->f_bsize = 512; 147 buf->f_blocks = sbi->sb_fs_size; 148 buf->f_bfree = sbi->sb_n_free; 149 buf->f_bavail = sbi->sb_n_free; 150 buf->f_files = sbi->sb_dirband_size / 4; 151 buf->f_ffree = sbi->sb_n_free_dnodes; 152 buf->f_namelen = 254; 153 154 unlock_kernel(); 155 156 return 0; 157 } 158 159 static struct kmem_cache * hpfs_inode_cachep; 160 161 static struct inode *hpfs_alloc_inode(struct super_block *sb) 162 { 163 struct hpfs_inode_info *ei; 164 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); 165 if (!ei) 166 return NULL; 167 ei->vfs_inode.i_version = 1; 168 return &ei->vfs_inode; 169 } 170 171 static void hpfs_destroy_inode(struct inode *inode) 172 { 173 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 174 } 175 176 static void init_once(struct kmem_cache *cachep, void *foo) 177 { 178 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 179 180 mutex_init(&ei->i_mutex); 181 mutex_init(&ei->i_parent_mutex); 182 inode_init_once(&ei->vfs_inode); 183 } 184 185 static int init_inodecache(void) 186 { 187 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 188 sizeof(struct hpfs_inode_info), 189 0, (SLAB_RECLAIM_ACCOUNT| 190 SLAB_MEM_SPREAD), 191 init_once); 192 if (hpfs_inode_cachep == NULL) 193 return -ENOMEM; 194 return 0; 195 } 196 197 static void destroy_inodecache(void) 198 { 199 kmem_cache_destroy(hpfs_inode_cachep); 200 } 201 202 /* 203 * A tiny parser for option strings, stolen from dosfs. 204 * Stolen again from read-only hpfs. 205 * And updated for table-driven option parsing. 206 */ 207 208 enum { 209 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 210 Opt_conv_binary, Opt_conv_text, Opt_conv_auto, 211 Opt_check_none, Opt_check_normal, Opt_check_strict, 212 Opt_err_cont, Opt_err_ro, Opt_err_panic, 213 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 214 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 215 Opt_timeshift, Opt_err, 216 }; 217 218 static match_table_t tokens = { 219 {Opt_help, "help"}, 220 {Opt_uid, "uid=%u"}, 221 {Opt_gid, "gid=%u"}, 222 {Opt_umask, "umask=%o"}, 223 {Opt_case_lower, "case=lower"}, 224 {Opt_case_asis, "case=asis"}, 225 {Opt_conv_binary, "conv=binary"}, 226 {Opt_conv_text, "conv=text"}, 227 {Opt_conv_auto, "conv=auto"}, 228 {Opt_check_none, "check=none"}, 229 {Opt_check_normal, "check=normal"}, 230 {Opt_check_strict, "check=strict"}, 231 {Opt_err_cont, "errors=continue"}, 232 {Opt_err_ro, "errors=remount-ro"}, 233 {Opt_err_panic, "errors=panic"}, 234 {Opt_eas_no, "eas=no"}, 235 {Opt_eas_ro, "eas=ro"}, 236 {Opt_eas_rw, "eas=rw"}, 237 {Opt_chkdsk_no, "chkdsk=no"}, 238 {Opt_chkdsk_errors, "chkdsk=errors"}, 239 {Opt_chkdsk_always, "chkdsk=always"}, 240 {Opt_timeshift, "timeshift=%d"}, 241 {Opt_err, NULL}, 242 }; 243 244 static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, 245 int *lowercase, int *conv, int *eas, int *chk, int *errs, 246 int *chkdsk, int *timeshift) 247 { 248 char *p; 249 int option; 250 251 if (!opts) 252 return 1; 253 254 /*printk("Parsing opts: '%s'\n",opts);*/ 255 256 while ((p = strsep(&opts, ",")) != NULL) { 257 substring_t args[MAX_OPT_ARGS]; 258 int token; 259 if (!*p) 260 continue; 261 262 token = match_token(p, tokens, args); 263 switch (token) { 264 case Opt_help: 265 return 2; 266 case Opt_uid: 267 if (match_int(args, &option)) 268 return 0; 269 *uid = option; 270 break; 271 case Opt_gid: 272 if (match_int(args, &option)) 273 return 0; 274 *gid = option; 275 break; 276 case Opt_umask: 277 if (match_octal(args, &option)) 278 return 0; 279 *umask = option; 280 break; 281 case Opt_case_lower: 282 *lowercase = 1; 283 break; 284 case Opt_case_asis: 285 *lowercase = 0; 286 break; 287 case Opt_conv_binary: 288 *conv = CONV_BINARY; 289 break; 290 case Opt_conv_text: 291 *conv = CONV_TEXT; 292 break; 293 case Opt_conv_auto: 294 *conv = CONV_AUTO; 295 break; 296 case Opt_check_none: 297 *chk = 0; 298 break; 299 case Opt_check_normal: 300 *chk = 1; 301 break; 302 case Opt_check_strict: 303 *chk = 2; 304 break; 305 case Opt_err_cont: 306 *errs = 0; 307 break; 308 case Opt_err_ro: 309 *errs = 1; 310 break; 311 case Opt_err_panic: 312 *errs = 2; 313 break; 314 case Opt_eas_no: 315 *eas = 0; 316 break; 317 case Opt_eas_ro: 318 *eas = 1; 319 break; 320 case Opt_eas_rw: 321 *eas = 2; 322 break; 323 case Opt_chkdsk_no: 324 *chkdsk = 0; 325 break; 326 case Opt_chkdsk_errors: 327 *chkdsk = 1; 328 break; 329 case Opt_chkdsk_always: 330 *chkdsk = 2; 331 break; 332 case Opt_timeshift: 333 { 334 int m = 1; 335 char *rhs = args[0].from; 336 if (!rhs || !*rhs) 337 return 0; 338 if (*rhs == '-') m = -1; 339 if (*rhs == '+' || *rhs == '-') rhs++; 340 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 341 if (*rhs) 342 return 0; 343 break; 344 } 345 default: 346 return 0; 347 } 348 } 349 return 1; 350 } 351 352 static inline void hpfs_help(void) 353 { 354 printk("\n\ 355 HPFS filesystem options:\n\ 356 help do not mount and display this text\n\ 357 uid=xxx set uid of files that don't have uid specified in eas\n\ 358 gid=xxx set gid of files that don't have gid specified in eas\n\ 359 umask=xxx set mode of files that don't have mode specified in eas\n\ 360 case=lower lowercase all files\n\ 361 case=asis do not lowercase files (default)\n\ 362 conv=binary do not convert CR/LF -> LF (default)\n\ 363 conv=auto convert only files with known text extensions\n\ 364 conv=text convert all files\n\ 365 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 366 check=normal do some checks - it should not crash (default)\n\ 367 check=strict do extra time-consuming checks, used for debugging\n\ 368 errors=continue continue on errors\n\ 369 errors=remount-ro remount read-only if errors found (default)\n\ 370 errors=panic panic on errors\n\ 371 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 372 chkdsk=errors mark fs dirty if errors found (default)\n\ 373 chkdsk=always always mark fs dirty - used for debugging\n\ 374 eas=no ignore extended attributes\n\ 375 eas=ro read but do not write extended attributes\n\ 376 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 377 timeshift=nnn add nnn seconds to file times\n\ 378 \n"); 379 } 380 381 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 382 { 383 uid_t uid; 384 gid_t gid; 385 umode_t umask; 386 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 387 int o; 388 struct hpfs_sb_info *sbi = hpfs_sb(s); 389 390 *flags |= MS_NOATIME; 391 392 uid = sbi->sb_uid; gid = sbi->sb_gid; 393 umask = 0777 & ~sbi->sb_mode; 394 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv; 395 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 396 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 397 398 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv, 399 &eas, &chk, &errs, &chkdsk, ×hift))) { 400 printk("HPFS: bad mount options.\n"); 401 return 1; 402 } 403 if (o == 2) { 404 hpfs_help(); 405 return 1; 406 } 407 if (timeshift != sbi->sb_timeshift) { 408 printk("HPFS: timeshift can't be changed using remount.\n"); 409 return 1; 410 } 411 412 unmark_dirty(s); 413 414 sbi->sb_uid = uid; sbi->sb_gid = gid; 415 sbi->sb_mode = 0777 & ~umask; 416 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv; 417 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 418 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 419 420 if (!(*flags & MS_RDONLY)) mark_dirty(s); 421 422 return 0; 423 } 424 425 /* Super operations */ 426 427 static const struct super_operations hpfs_sops = 428 { 429 .alloc_inode = hpfs_alloc_inode, 430 .destroy_inode = hpfs_destroy_inode, 431 .delete_inode = hpfs_delete_inode, 432 .put_super = hpfs_put_super, 433 .statfs = hpfs_statfs, 434 .remount_fs = hpfs_remount_fs, 435 }; 436 437 static int hpfs_fill_super(struct super_block *s, void *options, int silent) 438 { 439 struct buffer_head *bh0, *bh1, *bh2; 440 struct hpfs_boot_block *bootblock; 441 struct hpfs_super_block *superblock; 442 struct hpfs_spare_block *spareblock; 443 struct hpfs_sb_info *sbi; 444 struct inode *root; 445 446 uid_t uid; 447 gid_t gid; 448 umode_t umask; 449 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 450 451 dnode_secno root_dno; 452 struct hpfs_dirent *de = NULL; 453 struct quad_buffer_head qbh; 454 455 int o; 456 457 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 458 if (!sbi) 459 return -ENOMEM; 460 s->s_fs_info = sbi; 461 462 sbi->sb_bmp_dir = NULL; 463 sbi->sb_cp_table = NULL; 464 465 init_MUTEX(&sbi->hpfs_creation_de); 466 467 uid = current->uid; 468 gid = current->gid; 469 umask = current->fs->umask; 470 lowercase = 0; 471 conv = CONV_BINARY; 472 eas = 2; 473 chk = 1; 474 errs = 1; 475 chkdsk = 1; 476 timeshift = 0; 477 478 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv, 479 &eas, &chk, &errs, &chkdsk, ×hift))) { 480 printk("HPFS: bad mount options.\n"); 481 goto bail0; 482 } 483 if (o==2) { 484 hpfs_help(); 485 goto bail0; 486 } 487 488 /*sbi->sb_mounting = 1;*/ 489 sb_set_blocksize(s, 512); 490 sbi->sb_fs_size = -1; 491 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 492 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 493 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 494 495 /* Check magics */ 496 if (/*bootblock->magic != BB_MAGIC 497 ||*/ superblock->magic != SB_MAGIC 498 || spareblock->magic != SP_MAGIC) { 499 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 500 goto bail4; 501 } 502 503 /* Check version */ 504 if (!(s->s_flags & MS_RDONLY) && 505 superblock->funcversion != 2 && superblock->funcversion != 3) { 506 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 507 (int)superblock->version, (int)superblock->funcversion); 508 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"); 509 goto bail4; 510 } 511 512 s->s_flags |= MS_NOATIME; 513 514 /* Fill superblock stuff */ 515 s->s_magic = HPFS_SUPER_MAGIC; 516 s->s_op = &hpfs_sops; 517 518 sbi->sb_root = superblock->root; 519 sbi->sb_fs_size = superblock->n_sectors; 520 sbi->sb_bitmaps = superblock->bitmaps; 521 sbi->sb_dirband_start = superblock->dir_band_start; 522 sbi->sb_dirband_size = superblock->n_dir_band; 523 sbi->sb_dmap = superblock->dir_band_bitmap; 524 sbi->sb_uid = uid; 525 sbi->sb_gid = gid; 526 sbi->sb_mode = 0777 & ~umask; 527 sbi->sb_n_free = -1; 528 sbi->sb_n_free_dnodes = -1; 529 sbi->sb_lowercase = lowercase; 530 sbi->sb_conv = conv; 531 sbi->sb_eas = eas; 532 sbi->sb_chk = chk; 533 sbi->sb_chkdsk = chkdsk; 534 sbi->sb_err = errs; 535 sbi->sb_timeshift = timeshift; 536 sbi->sb_was_error = 0; 537 sbi->sb_cp_table = NULL; 538 sbi->sb_c_bitmap = -1; 539 sbi->sb_max_fwd_alloc = 0xffffff; 540 541 /* Load bitmap directory */ 542 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps))) 543 goto bail4; 544 545 /* Check for general fs errors*/ 546 if (spareblock->dirty && !spareblock->old_wrote) { 547 if (errs == 2) { 548 printk("HPFS: Improperly stopped, not mounted\n"); 549 goto bail4; 550 } 551 hpfs_error(s, "improperly stopped"); 552 } 553 554 if (!(s->s_flags & MS_RDONLY)) { 555 spareblock->dirty = 1; 556 spareblock->old_wrote = 0; 557 mark_buffer_dirty(bh2); 558 } 559 560 if (spareblock->hotfixes_used || spareblock->n_spares_used) { 561 if (errs >= 2) { 562 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 563 mark_dirty(s); 564 goto bail4; 565 } 566 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 567 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 568 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 569 } 570 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) { 571 if (errs >= 2) { 572 printk("HPFS: Spare dnodes used, try chkdsk\n"); 573 mark_dirty(s); 574 goto bail4; 575 } 576 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 577 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 578 } 579 if (chk) { 580 unsigned a; 581 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band || 582 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) { 583 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 584 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band); 585 goto bail4; 586 } 587 a = sbi->sb_dirband_size; 588 sbi->sb_dirband_size = 0; 589 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") || 590 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") || 591 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) { 592 mark_dirty(s); 593 goto bail4; 594 } 595 sbi->sb_dirband_size = a; 596 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 597 598 /* Load code page table */ 599 if (spareblock->n_code_pages) 600 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir))) 601 printk("HPFS: Warning: code page support is disabled\n"); 602 603 brelse(bh2); 604 brelse(bh1); 605 brelse(bh0); 606 607 root = iget_locked(s, sbi->sb_root); 608 if (!root) 609 goto bail0; 610 hpfs_init_inode(root); 611 hpfs_read_inode(root); 612 unlock_new_inode(root); 613 s->s_root = d_alloc_root(root); 614 if (!s->s_root) { 615 iput(root); 616 goto bail0; 617 } 618 hpfs_set_dentry_operations(s->s_root); 619 620 /* 621 * find the root directory's . pointer & finish filling in the inode 622 */ 623 624 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 625 if (root_dno) 626 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 627 if (!de) 628 hpfs_error(s, "unable to find root dir"); 629 else { 630 root->i_atime.tv_sec = local_to_gmt(s, de->read_date); 631 root->i_atime.tv_nsec = 0; 632 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date); 633 root->i_mtime.tv_nsec = 0; 634 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date); 635 root->i_ctime.tv_nsec = 0; 636 hpfs_i(root)->i_ea_size = de->ea_size; 637 hpfs_i(root)->i_parent_dir = root->i_ino; 638 if (root->i_size == -1) 639 root->i_size = 2048; 640 if (root->i_blocks == -1) 641 root->i_blocks = 5; 642 hpfs_brelse4(&qbh); 643 } 644 return 0; 645 646 bail4: brelse(bh2); 647 bail3: brelse(bh1); 648 bail2: brelse(bh0); 649 bail1: 650 bail0: 651 kfree(sbi->sb_bmp_dir); 652 kfree(sbi->sb_cp_table); 653 s->s_fs_info = NULL; 654 kfree(sbi); 655 return -EINVAL; 656 } 657 658 static int hpfs_get_sb(struct file_system_type *fs_type, 659 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 660 { 661 return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super, 662 mnt); 663 } 664 665 static struct file_system_type hpfs_fs_type = { 666 .owner = THIS_MODULE, 667 .name = "hpfs", 668 .get_sb = hpfs_get_sb, 669 .kill_sb = kill_block_super, 670 .fs_flags = FS_REQUIRES_DEV, 671 }; 672 673 static int __init init_hpfs_fs(void) 674 { 675 int err = init_inodecache(); 676 if (err) 677 goto out1; 678 err = register_filesystem(&hpfs_fs_type); 679 if (err) 680 goto out; 681 return 0; 682 out: 683 destroy_inodecache(); 684 out1: 685 return err; 686 } 687 688 static void __exit exit_hpfs_fs(void) 689 { 690 unregister_filesystem(&hpfs_fs_type); 691 destroy_inodecache(); 692 } 693 694 module_init(init_hpfs_fs) 695 module_exit(exit_hpfs_fs) 696 MODULE_LICENSE("GPL"); 697