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 16 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ 17 18 static void mark_dirty(struct super_block *s) 19 { 20 if (hpfs_sb(s)->sb_chkdsk && !(s->s_flags & MS_RDONLY)) { 21 struct buffer_head *bh; 22 struct hpfs_spare_block *sb; 23 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 24 sb->dirty = 1; 25 sb->old_wrote = 0; 26 mark_buffer_dirty(bh); 27 brelse(bh); 28 } 29 } 30 } 31 32 /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there 33 were errors) */ 34 35 static void unmark_dirty(struct super_block *s) 36 { 37 struct buffer_head *bh; 38 struct hpfs_spare_block *sb; 39 if (s->s_flags & MS_RDONLY) return; 40 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 41 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; 42 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; 43 mark_buffer_dirty(bh); 44 brelse(bh); 45 } 46 } 47 48 /* Filesystem error... */ 49 static char err_buf[1024]; 50 51 void hpfs_error(struct super_block *s, const char *fmt, ...) 52 { 53 va_list args; 54 55 va_start(args, fmt); 56 vsnprintf(err_buf, sizeof(err_buf), fmt, args); 57 va_end(args); 58 59 printk("HPFS: filesystem error: %s", err_buf); 60 if (!hpfs_sb(s)->sb_was_error) { 61 if (hpfs_sb(s)->sb_err == 2) { 62 printk("; crashing the system because you wanted it\n"); 63 mark_dirty(s); 64 panic("HPFS panic"); 65 } else if (hpfs_sb(s)->sb_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 hpfs_sb(s)->sb_was_error = 1; 76 } 77 78 /* 79 * A little trick to detect cycles in many hpfs structures and don't let the 80 * kernel crash on corrupted filesystem. When first called, set c2 to 0. 81 * 82 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories 83 * nested each in other, chkdsk locked up happilly. 84 */ 85 86 int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, 87 char *msg) 88 { 89 if (*c2 && *c1 == key) { 90 hpfs_error(s, "cycle detected on key %08x in %s", key, msg); 91 return 1; 92 } 93 (*c2)++; 94 if (!((*c2 - 1) & *c2)) *c1 = key; 95 return 0; 96 } 97 98 static void hpfs_put_super(struct super_block *s) 99 { 100 struct hpfs_sb_info *sbi = hpfs_sb(s); 101 kfree(sbi->sb_cp_table); 102 kfree(sbi->sb_bmp_dir); 103 unmark_dirty(s); 104 s->s_fs_info = NULL; 105 kfree(sbi); 106 } 107 108 unsigned hpfs_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 if (!bits[i]) continue; 118 for (b = bits[i]; b; b>>=1) count += b & 1; 119 } 120 hpfs_brelse4(&qbh); 121 return count; 122 } 123 124 static unsigned count_bitmaps(struct super_block *s) 125 { 126 unsigned n, count, n_bands; 127 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; 128 count = 0; 129 for (n = 0; n < n_bands; n++) 130 count += hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_bmp_dir[n]); 131 return count; 132 } 133 134 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) 135 { 136 struct super_block *s = dentry->d_sb; 137 struct hpfs_sb_info *sbi = hpfs_sb(s); 138 lock_kernel(); 139 140 /*if (sbi->sb_n_free == -1) {*/ 141 sbi->sb_n_free = count_bitmaps(s); 142 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap); 143 /*}*/ 144 buf->f_type = s->s_magic; 145 buf->f_bsize = 512; 146 buf->f_blocks = sbi->sb_fs_size; 147 buf->f_bfree = sbi->sb_n_free; 148 buf->f_bavail = sbi->sb_n_free; 149 buf->f_files = sbi->sb_dirband_size / 4; 150 buf->f_ffree = sbi->sb_n_free_dnodes; 151 buf->f_namelen = 254; 152 153 unlock_kernel(); 154 155 return 0; 156 } 157 158 static struct kmem_cache * hpfs_inode_cachep; 159 160 static struct inode *hpfs_alloc_inode(struct super_block *sb) 161 { 162 struct hpfs_inode_info *ei; 163 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); 164 if (!ei) 165 return NULL; 166 ei->vfs_inode.i_version = 1; 167 return &ei->vfs_inode; 168 } 169 170 static void hpfs_destroy_inode(struct inode *inode) 171 { 172 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 173 } 174 175 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) 176 { 177 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 178 179 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 180 SLAB_CTOR_CONSTRUCTOR) { 181 mutex_init(&ei->i_mutex); 182 mutex_init(&ei->i_parent_mutex); 183 inode_init_once(&ei->vfs_inode); 184 } 185 } 186 187 static int init_inodecache(void) 188 { 189 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 190 sizeof(struct hpfs_inode_info), 191 0, (SLAB_RECLAIM_ACCOUNT| 192 SLAB_MEM_SPREAD), 193 init_once, NULL); 194 if (hpfs_inode_cachep == NULL) 195 return -ENOMEM; 196 return 0; 197 } 198 199 static void destroy_inodecache(void) 200 { 201 kmem_cache_destroy(hpfs_inode_cachep); 202 } 203 204 /* 205 * A tiny parser for option strings, stolen from dosfs. 206 * Stolen again from read-only hpfs. 207 * And updated for table-driven option parsing. 208 */ 209 210 enum { 211 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 212 Opt_conv_binary, Opt_conv_text, Opt_conv_auto, 213 Opt_check_none, Opt_check_normal, Opt_check_strict, 214 Opt_err_cont, Opt_err_ro, Opt_err_panic, 215 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 216 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 217 Opt_timeshift, Opt_err, 218 }; 219 220 static match_table_t tokens = { 221 {Opt_help, "help"}, 222 {Opt_uid, "uid=%u"}, 223 {Opt_gid, "gid=%u"}, 224 {Opt_umask, "umask=%o"}, 225 {Opt_case_lower, "case=lower"}, 226 {Opt_case_asis, "case=asis"}, 227 {Opt_conv_binary, "conv=binary"}, 228 {Opt_conv_text, "conv=text"}, 229 {Opt_conv_auto, "conv=auto"}, 230 {Opt_check_none, "check=none"}, 231 {Opt_check_normal, "check=normal"}, 232 {Opt_check_strict, "check=strict"}, 233 {Opt_err_cont, "errors=continue"}, 234 {Opt_err_ro, "errors=remount-ro"}, 235 {Opt_err_panic, "errors=panic"}, 236 {Opt_eas_no, "eas=no"}, 237 {Opt_eas_ro, "eas=ro"}, 238 {Opt_eas_rw, "eas=rw"}, 239 {Opt_chkdsk_no, "chkdsk=no"}, 240 {Opt_chkdsk_errors, "chkdsk=errors"}, 241 {Opt_chkdsk_always, "chkdsk=always"}, 242 {Opt_timeshift, "timeshift=%d"}, 243 {Opt_err, NULL}, 244 }; 245 246 static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, 247 int *lowercase, int *conv, int *eas, int *chk, int *errs, 248 int *chkdsk, int *timeshift) 249 { 250 char *p; 251 int option; 252 253 if (!opts) 254 return 1; 255 256 /*printk("Parsing opts: '%s'\n",opts);*/ 257 258 while ((p = strsep(&opts, ",")) != NULL) { 259 substring_t args[MAX_OPT_ARGS]; 260 int token; 261 if (!*p) 262 continue; 263 264 token = match_token(p, tokens, args); 265 switch (token) { 266 case Opt_help: 267 return 2; 268 case Opt_uid: 269 if (match_int(args, &option)) 270 return 0; 271 *uid = option; 272 break; 273 case Opt_gid: 274 if (match_int(args, &option)) 275 return 0; 276 *gid = option; 277 break; 278 case Opt_umask: 279 if (match_octal(args, &option)) 280 return 0; 281 *umask = option; 282 break; 283 case Opt_case_lower: 284 *lowercase = 1; 285 break; 286 case Opt_case_asis: 287 *lowercase = 0; 288 break; 289 case Opt_conv_binary: 290 *conv = CONV_BINARY; 291 break; 292 case Opt_conv_text: 293 *conv = CONV_TEXT; 294 break; 295 case Opt_conv_auto: 296 *conv = CONV_AUTO; 297 break; 298 case Opt_check_none: 299 *chk = 0; 300 break; 301 case Opt_check_normal: 302 *chk = 1; 303 break; 304 case Opt_check_strict: 305 *chk = 2; 306 break; 307 case Opt_err_cont: 308 *errs = 0; 309 break; 310 case Opt_err_ro: 311 *errs = 1; 312 break; 313 case Opt_err_panic: 314 *errs = 2; 315 break; 316 case Opt_eas_no: 317 *eas = 0; 318 break; 319 case Opt_eas_ro: 320 *eas = 1; 321 break; 322 case Opt_eas_rw: 323 *eas = 2; 324 break; 325 case Opt_chkdsk_no: 326 *chkdsk = 0; 327 break; 328 case Opt_chkdsk_errors: 329 *chkdsk = 1; 330 break; 331 case Opt_chkdsk_always: 332 *chkdsk = 2; 333 break; 334 case Opt_timeshift: 335 { 336 int m = 1; 337 char *rhs = args[0].from; 338 if (!rhs || !*rhs) 339 return 0; 340 if (*rhs == '-') m = -1; 341 if (*rhs == '+' || *rhs == '-') rhs++; 342 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 343 if (*rhs) 344 return 0; 345 break; 346 } 347 default: 348 return 0; 349 } 350 } 351 return 1; 352 } 353 354 static inline void hpfs_help(void) 355 { 356 printk("\n\ 357 HPFS filesystem options:\n\ 358 help do not mount and display this text\n\ 359 uid=xxx set uid of files that don't have uid specified in eas\n\ 360 gid=xxx set gid of files that don't have gid specified in eas\n\ 361 umask=xxx set mode of files that don't have mode specified in eas\n\ 362 case=lower lowercase all files\n\ 363 case=asis do not lowercase files (default)\n\ 364 conv=binary do not convert CR/LF -> LF (default)\n\ 365 conv=auto convert only files with known text extensions\n\ 366 conv=text convert all files\n\ 367 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 368 check=normal do some checks - it should not crash (default)\n\ 369 check=strict do extra time-consuming checks, used for debugging\n\ 370 errors=continue continue on errors\n\ 371 errors=remount-ro remount read-only if errors found (default)\n\ 372 errors=panic panic on errors\n\ 373 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 374 chkdsk=errors mark fs dirty if errors found (default)\n\ 375 chkdsk=always always mark fs dirty - used for debugging\n\ 376 eas=no ignore extended attributes\n\ 377 eas=ro read but do not write extended attributes\n\ 378 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 379 timeshift=nnn add nnn seconds to file times\n\ 380 \n"); 381 } 382 383 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 384 { 385 uid_t uid; 386 gid_t gid; 387 umode_t umask; 388 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 389 int o; 390 struct hpfs_sb_info *sbi = hpfs_sb(s); 391 392 *flags |= MS_NOATIME; 393 394 uid = sbi->sb_uid; gid = sbi->sb_gid; 395 umask = 0777 & ~sbi->sb_mode; 396 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv; 397 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 398 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 399 400 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv, 401 &eas, &chk, &errs, &chkdsk, ×hift))) { 402 printk("HPFS: bad mount options.\n"); 403 return 1; 404 } 405 if (o == 2) { 406 hpfs_help(); 407 return 1; 408 } 409 if (timeshift != sbi->sb_timeshift) { 410 printk("HPFS: timeshift can't be changed using remount.\n"); 411 return 1; 412 } 413 414 unmark_dirty(s); 415 416 sbi->sb_uid = uid; sbi->sb_gid = gid; 417 sbi->sb_mode = 0777 & ~umask; 418 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv; 419 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 420 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 421 422 if (!(*flags & MS_RDONLY)) mark_dirty(s); 423 424 return 0; 425 } 426 427 /* Super operations */ 428 429 static const struct super_operations hpfs_sops = 430 { 431 .alloc_inode = hpfs_alloc_inode, 432 .destroy_inode = hpfs_destroy_inode, 433 .delete_inode = hpfs_delete_inode, 434 .put_super = hpfs_put_super, 435 .statfs = hpfs_statfs, 436 .remount_fs = hpfs_remount_fs, 437 }; 438 439 static int hpfs_fill_super(struct super_block *s, void *options, int silent) 440 { 441 struct buffer_head *bh0, *bh1, *bh2; 442 struct hpfs_boot_block *bootblock; 443 struct hpfs_super_block *superblock; 444 struct hpfs_spare_block *spareblock; 445 struct hpfs_sb_info *sbi; 446 struct inode *root; 447 448 uid_t uid; 449 gid_t gid; 450 umode_t umask; 451 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 452 453 dnode_secno root_dno; 454 struct hpfs_dirent *de = NULL; 455 struct quad_buffer_head qbh; 456 457 int o; 458 459 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 460 if (!sbi) 461 return -ENOMEM; 462 s->s_fs_info = sbi; 463 464 sbi->sb_bmp_dir = NULL; 465 sbi->sb_cp_table = NULL; 466 467 init_MUTEX(&sbi->hpfs_creation_de); 468 469 uid = current->uid; 470 gid = current->gid; 471 umask = current->fs->umask; 472 lowercase = 0; 473 conv = CONV_BINARY; 474 eas = 2; 475 chk = 1; 476 errs = 1; 477 chkdsk = 1; 478 timeshift = 0; 479 480 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv, 481 &eas, &chk, &errs, &chkdsk, ×hift))) { 482 printk("HPFS: bad mount options.\n"); 483 goto bail0; 484 } 485 if (o==2) { 486 hpfs_help(); 487 goto bail0; 488 } 489 490 /*sbi->sb_mounting = 1;*/ 491 sb_set_blocksize(s, 512); 492 sbi->sb_fs_size = -1; 493 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 494 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 495 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 496 497 /* Check magics */ 498 if (/*bootblock->magic != BB_MAGIC 499 ||*/ superblock->magic != SB_MAGIC 500 || spareblock->magic != SP_MAGIC) { 501 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 502 goto bail4; 503 } 504 505 /* Check version */ 506 if (!(s->s_flags & MS_RDONLY) && 507 superblock->funcversion != 2 && superblock->funcversion != 3) { 508 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 509 (int)superblock->version, (int)superblock->funcversion); 510 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"); 511 goto bail4; 512 } 513 514 s->s_flags |= MS_NOATIME; 515 516 /* Fill superblock stuff */ 517 s->s_magic = HPFS_SUPER_MAGIC; 518 s->s_op = &hpfs_sops; 519 520 sbi->sb_root = superblock->root; 521 sbi->sb_fs_size = superblock->n_sectors; 522 sbi->sb_bitmaps = superblock->bitmaps; 523 sbi->sb_dirband_start = superblock->dir_band_start; 524 sbi->sb_dirband_size = superblock->n_dir_band; 525 sbi->sb_dmap = superblock->dir_band_bitmap; 526 sbi->sb_uid = uid; 527 sbi->sb_gid = gid; 528 sbi->sb_mode = 0777 & ~umask; 529 sbi->sb_n_free = -1; 530 sbi->sb_n_free_dnodes = -1; 531 sbi->sb_lowercase = lowercase; 532 sbi->sb_conv = conv; 533 sbi->sb_eas = eas; 534 sbi->sb_chk = chk; 535 sbi->sb_chkdsk = chkdsk; 536 sbi->sb_err = errs; 537 sbi->sb_timeshift = timeshift; 538 sbi->sb_was_error = 0; 539 sbi->sb_cp_table = NULL; 540 sbi->sb_c_bitmap = -1; 541 sbi->sb_max_fwd_alloc = 0xffffff; 542 543 /* Load bitmap directory */ 544 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps))) 545 goto bail4; 546 547 /* Check for general fs errors*/ 548 if (spareblock->dirty && !spareblock->old_wrote) { 549 if (errs == 2) { 550 printk("HPFS: Improperly stopped, not mounted\n"); 551 goto bail4; 552 } 553 hpfs_error(s, "improperly stopped"); 554 } 555 556 if (!(s->s_flags & MS_RDONLY)) { 557 spareblock->dirty = 1; 558 spareblock->old_wrote = 0; 559 mark_buffer_dirty(bh2); 560 } 561 562 if (spareblock->hotfixes_used || spareblock->n_spares_used) { 563 if (errs >= 2) { 564 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 565 mark_dirty(s); 566 goto bail4; 567 } 568 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 569 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 570 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 571 } 572 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) { 573 if (errs >= 2) { 574 printk("HPFS: Spare dnodes used, try chkdsk\n"); 575 mark_dirty(s); 576 goto bail4; 577 } 578 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 579 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 580 } 581 if (chk) { 582 unsigned a; 583 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band || 584 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) { 585 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 586 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band); 587 goto bail4; 588 } 589 a = sbi->sb_dirband_size; 590 sbi->sb_dirband_size = 0; 591 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") || 592 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") || 593 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) { 594 mark_dirty(s); 595 goto bail4; 596 } 597 sbi->sb_dirband_size = a; 598 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 599 600 /* Load code page table */ 601 if (spareblock->n_code_pages) 602 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir))) 603 printk("HPFS: Warning: code page support is disabled\n"); 604 605 brelse(bh2); 606 brelse(bh1); 607 brelse(bh0); 608 609 root = iget_locked(s, sbi->sb_root); 610 if (!root) 611 goto bail0; 612 hpfs_init_inode(root); 613 hpfs_read_inode(root); 614 unlock_new_inode(root); 615 s->s_root = d_alloc_root(root); 616 if (!s->s_root) { 617 iput(root); 618 goto bail0; 619 } 620 hpfs_set_dentry_operations(s->s_root); 621 622 /* 623 * find the root directory's . pointer & finish filling in the inode 624 */ 625 626 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 627 if (root_dno) 628 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 629 if (!de) 630 hpfs_error(s, "unable to find root dir"); 631 else { 632 root->i_atime.tv_sec = local_to_gmt(s, de->read_date); 633 root->i_atime.tv_nsec = 0; 634 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date); 635 root->i_mtime.tv_nsec = 0; 636 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date); 637 root->i_ctime.tv_nsec = 0; 638 hpfs_i(root)->i_ea_size = de->ea_size; 639 hpfs_i(root)->i_parent_dir = root->i_ino; 640 if (root->i_size == -1) 641 root->i_size = 2048; 642 if (root->i_blocks == -1) 643 root->i_blocks = 5; 644 hpfs_brelse4(&qbh); 645 } 646 return 0; 647 648 bail4: brelse(bh2); 649 bail3: brelse(bh1); 650 bail2: brelse(bh0); 651 bail1: 652 bail0: 653 kfree(sbi->sb_bmp_dir); 654 kfree(sbi->sb_cp_table); 655 s->s_fs_info = NULL; 656 kfree(sbi); 657 return -EINVAL; 658 } 659 660 static int hpfs_get_sb(struct file_system_type *fs_type, 661 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 662 { 663 return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super, 664 mnt); 665 } 666 667 static struct file_system_type hpfs_fs_type = { 668 .owner = THIS_MODULE, 669 .name = "hpfs", 670 .get_sb = hpfs_get_sb, 671 .kill_sb = kill_block_super, 672 .fs_flags = FS_REQUIRES_DEV, 673 }; 674 675 static int __init init_hpfs_fs(void) 676 { 677 int err = init_inodecache(); 678 if (err) 679 goto out1; 680 err = register_filesystem(&hpfs_fs_type); 681 if (err) 682 goto out; 683 return 0; 684 out: 685 destroy_inodecache(); 686 out1: 687 return err; 688 } 689 690 static void __exit exit_hpfs_fs(void) 691 { 692 unregister_filesystem(&hpfs_fs_type); 693 destroy_inodecache(); 694 } 695 696 module_init(init_hpfs_fs) 697 module_exit(exit_hpfs_fs) 698 MODULE_LICENSE("GPL"); 699