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 #include <linux/bitmap.h> 17 #include <linux/slab.h> 18 19 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ 20 21 static void mark_dirty(struct super_block *s, int remount) 22 { 23 if (hpfs_sb(s)->sb_chkdsk && (remount || !(s->s_flags & MS_RDONLY))) { 24 struct buffer_head *bh; 25 struct hpfs_spare_block *sb; 26 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 27 sb->dirty = 1; 28 sb->old_wrote = 0; 29 mark_buffer_dirty(bh); 30 sync_dirty_buffer(bh); 31 brelse(bh); 32 } 33 } 34 } 35 36 /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there 37 were errors) */ 38 39 static void unmark_dirty(struct super_block *s) 40 { 41 struct buffer_head *bh; 42 struct hpfs_spare_block *sb; 43 if (s->s_flags & MS_RDONLY) return; 44 sync_blockdev(s->s_bdev); 45 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 46 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; 47 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; 48 mark_buffer_dirty(bh); 49 sync_dirty_buffer(bh); 50 brelse(bh); 51 } 52 } 53 54 /* Filesystem error... */ 55 static char err_buf[1024]; 56 57 void hpfs_error(struct super_block *s, const char *fmt, ...) 58 { 59 va_list args; 60 61 va_start(args, fmt); 62 vsnprintf(err_buf, sizeof(err_buf), fmt, args); 63 va_end(args); 64 65 printk("HPFS: filesystem error: %s", err_buf); 66 if (!hpfs_sb(s)->sb_was_error) { 67 if (hpfs_sb(s)->sb_err == 2) { 68 printk("; crashing the system because you wanted it\n"); 69 mark_dirty(s, 0); 70 panic("HPFS panic"); 71 } else if (hpfs_sb(s)->sb_err == 1) { 72 if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n"); 73 else { 74 printk("; remounting read-only\n"); 75 mark_dirty(s, 0); 76 s->s_flags |= MS_RDONLY; 77 } 78 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n"); 79 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); 80 } else printk("\n"); 81 hpfs_sb(s)->sb_was_error = 1; 82 } 83 84 /* 85 * A little trick to detect cycles in many hpfs structures and don't let the 86 * kernel crash on corrupted filesystem. When first called, set c2 to 0. 87 * 88 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories 89 * nested each in other, chkdsk locked up happilly. 90 */ 91 92 int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, 93 char *msg) 94 { 95 if (*c2 && *c1 == key) { 96 hpfs_error(s, "cycle detected on key %08x in %s", key, msg); 97 return 1; 98 } 99 (*c2)++; 100 if (!((*c2 - 1) & *c2)) *c1 = key; 101 return 0; 102 } 103 104 static void hpfs_put_super(struct super_block *s) 105 { 106 struct hpfs_sb_info *sbi = hpfs_sb(s); 107 108 hpfs_lock(s); 109 unmark_dirty(s); 110 hpfs_unlock(s); 111 112 kfree(sbi->sb_cp_table); 113 kfree(sbi->sb_bmp_dir); 114 s->s_fs_info = NULL; 115 kfree(sbi); 116 } 117 118 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) 119 { 120 struct quad_buffer_head qbh; 121 unsigned long *bits; 122 unsigned count; 123 124 bits = hpfs_map_4sectors(s, secno, &qbh, 4); 125 if (!bits) 126 return 0; 127 count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); 128 hpfs_brelse4(&qbh); 129 return count; 130 } 131 132 static unsigned count_bitmaps(struct super_block *s) 133 { 134 unsigned n, count, n_bands; 135 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; 136 count = 0; 137 for (n = 0; n < n_bands; n++) 138 count += hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n])); 139 return count; 140 } 141 142 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) 143 { 144 struct super_block *s = dentry->d_sb; 145 struct hpfs_sb_info *sbi = hpfs_sb(s); 146 u64 id = huge_encode_dev(s->s_bdev->bd_dev); 147 hpfs_lock(s); 148 149 /*if (sbi->sb_n_free == -1) {*/ 150 sbi->sb_n_free = count_bitmaps(s); 151 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap); 152 /*}*/ 153 buf->f_type = s->s_magic; 154 buf->f_bsize = 512; 155 buf->f_blocks = sbi->sb_fs_size; 156 buf->f_bfree = sbi->sb_n_free; 157 buf->f_bavail = sbi->sb_n_free; 158 buf->f_files = sbi->sb_dirband_size / 4; 159 buf->f_ffree = sbi->sb_n_free_dnodes; 160 buf->f_fsid.val[0] = (u32)id; 161 buf->f_fsid.val[1] = (u32)(id >> 32); 162 buf->f_namelen = 254; 163 164 hpfs_unlock(s); 165 166 return 0; 167 } 168 169 static struct kmem_cache * hpfs_inode_cachep; 170 171 static struct inode *hpfs_alloc_inode(struct super_block *sb) 172 { 173 struct hpfs_inode_info *ei; 174 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); 175 if (!ei) 176 return NULL; 177 ei->vfs_inode.i_version = 1; 178 return &ei->vfs_inode; 179 } 180 181 static void hpfs_i_callback(struct rcu_head *head) 182 { 183 struct inode *inode = container_of(head, struct inode, i_rcu); 184 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 185 } 186 187 static void hpfs_destroy_inode(struct inode *inode) 188 { 189 call_rcu(&inode->i_rcu, hpfs_i_callback); 190 } 191 192 static void init_once(void *foo) 193 { 194 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 195 196 inode_init_once(&ei->vfs_inode); 197 } 198 199 static int init_inodecache(void) 200 { 201 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 202 sizeof(struct hpfs_inode_info), 203 0, (SLAB_RECLAIM_ACCOUNT| 204 SLAB_MEM_SPREAD), 205 init_once); 206 if (hpfs_inode_cachep == NULL) 207 return -ENOMEM; 208 return 0; 209 } 210 211 static void destroy_inodecache(void) 212 { 213 kmem_cache_destroy(hpfs_inode_cachep); 214 } 215 216 /* 217 * A tiny parser for option strings, stolen from dosfs. 218 * Stolen again from read-only hpfs. 219 * And updated for table-driven option parsing. 220 */ 221 222 enum { 223 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 224 Opt_check_none, Opt_check_normal, Opt_check_strict, 225 Opt_err_cont, Opt_err_ro, Opt_err_panic, 226 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 227 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 228 Opt_timeshift, Opt_err, 229 }; 230 231 static const match_table_t tokens = { 232 {Opt_help, "help"}, 233 {Opt_uid, "uid=%u"}, 234 {Opt_gid, "gid=%u"}, 235 {Opt_umask, "umask=%o"}, 236 {Opt_case_lower, "case=lower"}, 237 {Opt_case_asis, "case=asis"}, 238 {Opt_check_none, "check=none"}, 239 {Opt_check_normal, "check=normal"}, 240 {Opt_check_strict, "check=strict"}, 241 {Opt_err_cont, "errors=continue"}, 242 {Opt_err_ro, "errors=remount-ro"}, 243 {Opt_err_panic, "errors=panic"}, 244 {Opt_eas_no, "eas=no"}, 245 {Opt_eas_ro, "eas=ro"}, 246 {Opt_eas_rw, "eas=rw"}, 247 {Opt_chkdsk_no, "chkdsk=no"}, 248 {Opt_chkdsk_errors, "chkdsk=errors"}, 249 {Opt_chkdsk_always, "chkdsk=always"}, 250 {Opt_timeshift, "timeshift=%d"}, 251 {Opt_err, NULL}, 252 }; 253 254 static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, 255 int *lowercase, int *eas, int *chk, int *errs, 256 int *chkdsk, int *timeshift) 257 { 258 char *p; 259 int option; 260 261 if (!opts) 262 return 1; 263 264 /*printk("Parsing opts: '%s'\n",opts);*/ 265 266 while ((p = strsep(&opts, ",")) != NULL) { 267 substring_t args[MAX_OPT_ARGS]; 268 int token; 269 if (!*p) 270 continue; 271 272 token = match_token(p, tokens, args); 273 switch (token) { 274 case Opt_help: 275 return 2; 276 case Opt_uid: 277 if (match_int(args, &option)) 278 return 0; 279 *uid = option; 280 break; 281 case Opt_gid: 282 if (match_int(args, &option)) 283 return 0; 284 *gid = option; 285 break; 286 case Opt_umask: 287 if (match_octal(args, &option)) 288 return 0; 289 *umask = option; 290 break; 291 case Opt_case_lower: 292 *lowercase = 1; 293 break; 294 case Opt_case_asis: 295 *lowercase = 0; 296 break; 297 case Opt_check_none: 298 *chk = 0; 299 break; 300 case Opt_check_normal: 301 *chk = 1; 302 break; 303 case Opt_check_strict: 304 *chk = 2; 305 break; 306 case Opt_err_cont: 307 *errs = 0; 308 break; 309 case Opt_err_ro: 310 *errs = 1; 311 break; 312 case Opt_err_panic: 313 *errs = 2; 314 break; 315 case Opt_eas_no: 316 *eas = 0; 317 break; 318 case Opt_eas_ro: 319 *eas = 1; 320 break; 321 case Opt_eas_rw: 322 *eas = 2; 323 break; 324 case Opt_chkdsk_no: 325 *chkdsk = 0; 326 break; 327 case Opt_chkdsk_errors: 328 *chkdsk = 1; 329 break; 330 case Opt_chkdsk_always: 331 *chkdsk = 2; 332 break; 333 case Opt_timeshift: 334 { 335 int m = 1; 336 char *rhs = args[0].from; 337 if (!rhs || !*rhs) 338 return 0; 339 if (*rhs == '-') m = -1; 340 if (*rhs == '+' || *rhs == '-') rhs++; 341 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 342 if (*rhs) 343 return 0; 344 break; 345 } 346 default: 347 return 0; 348 } 349 } 350 return 1; 351 } 352 353 static inline void hpfs_help(void) 354 { 355 printk("\n\ 356 HPFS filesystem options:\n\ 357 help do not mount and display this text\n\ 358 uid=xxx set uid of files that don't have uid specified in eas\n\ 359 gid=xxx set gid of files that don't have gid specified in eas\n\ 360 umask=xxx set mode of files that don't have mode specified in eas\n\ 361 case=lower lowercase all files\n\ 362 case=asis do not lowercase files (default)\n\ 363 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 364 check=normal do some checks - it should not crash (default)\n\ 365 check=strict do extra time-consuming checks, used for debugging\n\ 366 errors=continue continue on errors\n\ 367 errors=remount-ro remount read-only if errors found (default)\n\ 368 errors=panic panic on errors\n\ 369 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 370 chkdsk=errors mark fs dirty if errors found (default)\n\ 371 chkdsk=always always mark fs dirty - used for debugging\n\ 372 eas=no ignore extended attributes\n\ 373 eas=ro read but do not write extended attributes\n\ 374 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 375 timeshift=nnn add nnn seconds to file times\n\ 376 \n"); 377 } 378 379 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 380 { 381 uid_t uid; 382 gid_t gid; 383 umode_t umask; 384 int lowercase, eas, chk, errs, chkdsk, timeshift; 385 int o; 386 struct hpfs_sb_info *sbi = hpfs_sb(s); 387 char *new_opts = kstrdup(data, GFP_KERNEL); 388 389 *flags |= MS_NOATIME; 390 391 hpfs_lock(s); 392 lock_super(s); 393 uid = sbi->sb_uid; gid = sbi->sb_gid; 394 umask = 0777 & ~sbi->sb_mode; 395 lowercase = sbi->sb_lowercase; 396 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 397 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 398 399 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, 400 &eas, &chk, &errs, &chkdsk, ×hift))) { 401 printk("HPFS: bad mount options.\n"); 402 goto out_err; 403 } 404 if (o == 2) { 405 hpfs_help(); 406 goto out_err; 407 } 408 if (timeshift != sbi->sb_timeshift) { 409 printk("HPFS: timeshift can't be changed using remount.\n"); 410 goto out_err; 411 } 412 413 unmark_dirty(s); 414 415 sbi->sb_uid = uid; sbi->sb_gid = gid; 416 sbi->sb_mode = 0777 & ~umask; 417 sbi->sb_lowercase = lowercase; 418 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 419 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 420 421 if (!(*flags & MS_RDONLY)) mark_dirty(s, 1); 422 423 replace_mount_options(s, new_opts); 424 425 unlock_super(s); 426 hpfs_unlock(s); 427 return 0; 428 429 out_err: 430 unlock_super(s); 431 hpfs_unlock(s); 432 kfree(new_opts); 433 return -EINVAL; 434 } 435 436 /* Super operations */ 437 438 static const struct super_operations hpfs_sops = 439 { 440 .alloc_inode = hpfs_alloc_inode, 441 .destroy_inode = hpfs_destroy_inode, 442 .evict_inode = hpfs_evict_inode, 443 .put_super = hpfs_put_super, 444 .statfs = hpfs_statfs, 445 .remount_fs = hpfs_remount_fs, 446 .show_options = generic_show_options, 447 }; 448 449 static int hpfs_fill_super(struct super_block *s, void *options, int silent) 450 { 451 struct buffer_head *bh0, *bh1, *bh2; 452 struct hpfs_boot_block *bootblock; 453 struct hpfs_super_block *superblock; 454 struct hpfs_spare_block *spareblock; 455 struct hpfs_sb_info *sbi; 456 struct inode *root; 457 458 uid_t uid; 459 gid_t gid; 460 umode_t umask; 461 int lowercase, eas, chk, errs, chkdsk, timeshift; 462 463 dnode_secno root_dno; 464 struct hpfs_dirent *de = NULL; 465 struct quad_buffer_head qbh; 466 467 int o; 468 469 save_mount_options(s, options); 470 471 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 472 if (!sbi) { 473 return -ENOMEM; 474 } 475 s->s_fs_info = sbi; 476 477 sbi->sb_bmp_dir = NULL; 478 sbi->sb_cp_table = NULL; 479 480 mutex_init(&sbi->hpfs_mutex); 481 hpfs_lock(s); 482 483 uid = current_uid(); 484 gid = current_gid(); 485 umask = current_umask(); 486 lowercase = 0; 487 eas = 2; 488 chk = 1; 489 errs = 1; 490 chkdsk = 1; 491 timeshift = 0; 492 493 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, 494 &eas, &chk, &errs, &chkdsk, ×hift))) { 495 printk("HPFS: bad mount options.\n"); 496 goto bail0; 497 } 498 if (o==2) { 499 hpfs_help(); 500 goto bail0; 501 } 502 503 /*sbi->sb_mounting = 1;*/ 504 sb_set_blocksize(s, 512); 505 sbi->sb_fs_size = -1; 506 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 507 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 508 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 509 510 /* Check magics */ 511 if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC 512 ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC 513 || le32_to_cpu(spareblock->magic) != SP_MAGIC) { 514 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 515 goto bail4; 516 } 517 518 /* Check version */ 519 if (!(s->s_flags & MS_RDONLY) && 520 superblock->funcversion != 2 && superblock->funcversion != 3) { 521 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 522 (int)superblock->version, (int)superblock->funcversion); 523 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"); 524 goto bail4; 525 } 526 527 s->s_flags |= MS_NOATIME; 528 529 /* Fill superblock stuff */ 530 s->s_magic = HPFS_SUPER_MAGIC; 531 s->s_op = &hpfs_sops; 532 s->s_d_op = &hpfs_dentry_operations; 533 534 sbi->sb_root = le32_to_cpu(superblock->root); 535 sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors); 536 sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps); 537 sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start); 538 sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band); 539 sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap); 540 sbi->sb_uid = uid; 541 sbi->sb_gid = gid; 542 sbi->sb_mode = 0777 & ~umask; 543 sbi->sb_n_free = -1; 544 sbi->sb_n_free_dnodes = -1; 545 sbi->sb_lowercase = lowercase; 546 sbi->sb_eas = eas; 547 sbi->sb_chk = chk; 548 sbi->sb_chkdsk = chkdsk; 549 sbi->sb_err = errs; 550 sbi->sb_timeshift = timeshift; 551 sbi->sb_was_error = 0; 552 sbi->sb_cp_table = NULL; 553 sbi->sb_c_bitmap = -1; 554 sbi->sb_max_fwd_alloc = 0xffffff; 555 556 /* Load bitmap directory */ 557 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps)))) 558 goto bail4; 559 560 /* Check for general fs errors*/ 561 if (spareblock->dirty && !spareblock->old_wrote) { 562 if (errs == 2) { 563 printk("HPFS: Improperly stopped, not mounted\n"); 564 goto bail4; 565 } 566 hpfs_error(s, "improperly stopped"); 567 } 568 569 if (!(s->s_flags & MS_RDONLY)) { 570 spareblock->dirty = 1; 571 spareblock->old_wrote = 0; 572 mark_buffer_dirty(bh2); 573 } 574 575 if (le32_to_cpu(spareblock->hotfixes_used) || le32_to_cpu(spareblock->n_spares_used)) { 576 if (errs >= 2) { 577 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 578 mark_dirty(s, 0); 579 goto bail4; 580 } 581 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 582 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 583 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 584 } 585 if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) { 586 if (errs >= 2) { 587 printk("HPFS: Spare dnodes used, try chkdsk\n"); 588 mark_dirty(s, 0); 589 goto bail4; 590 } 591 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 592 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 593 } 594 if (chk) { 595 unsigned a; 596 if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) || 597 le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) { 598 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 599 le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band)); 600 goto bail4; 601 } 602 a = sbi->sb_dirband_size; 603 sbi->sb_dirband_size = 0; 604 if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") || 605 hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") || 606 hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) { 607 mark_dirty(s, 0); 608 goto bail4; 609 } 610 sbi->sb_dirband_size = a; 611 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 612 613 /* Load code page table */ 614 if (le32_to_cpu(spareblock->n_code_pages)) 615 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir)))) 616 printk("HPFS: Warning: code page support is disabled\n"); 617 618 brelse(bh2); 619 brelse(bh1); 620 brelse(bh0); 621 622 root = iget_locked(s, sbi->sb_root); 623 if (!root) 624 goto bail0; 625 hpfs_init_inode(root); 626 hpfs_read_inode(root); 627 unlock_new_inode(root); 628 s->s_root = d_make_root(root); 629 if (!s->s_root) 630 goto bail0; 631 632 /* 633 * find the root directory's . pointer & finish filling in the inode 634 */ 635 636 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 637 if (root_dno) 638 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 639 if (!de) 640 hpfs_error(s, "unable to find root dir"); 641 else { 642 root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date)); 643 root->i_atime.tv_nsec = 0; 644 root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date)); 645 root->i_mtime.tv_nsec = 0; 646 root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date)); 647 root->i_ctime.tv_nsec = 0; 648 hpfs_i(root)->i_ea_size = le16_to_cpu(de->ea_size); 649 hpfs_i(root)->i_parent_dir = root->i_ino; 650 if (root->i_size == -1) 651 root->i_size = 2048; 652 if (root->i_blocks == -1) 653 root->i_blocks = 5; 654 hpfs_brelse4(&qbh); 655 } 656 hpfs_unlock(s); 657 return 0; 658 659 bail4: brelse(bh2); 660 bail3: brelse(bh1); 661 bail2: brelse(bh0); 662 bail1: 663 bail0: 664 hpfs_unlock(s); 665 kfree(sbi->sb_bmp_dir); 666 kfree(sbi->sb_cp_table); 667 s->s_fs_info = NULL; 668 kfree(sbi); 669 return -EINVAL; 670 } 671 672 static struct dentry *hpfs_mount(struct file_system_type *fs_type, 673 int flags, const char *dev_name, void *data) 674 { 675 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); 676 } 677 678 static struct file_system_type hpfs_fs_type = { 679 .owner = THIS_MODULE, 680 .name = "hpfs", 681 .mount = hpfs_mount, 682 .kill_sb = kill_block_super, 683 .fs_flags = FS_REQUIRES_DEV, 684 }; 685 686 static int __init init_hpfs_fs(void) 687 { 688 int err = init_inodecache(); 689 if (err) 690 goto out1; 691 err = register_filesystem(&hpfs_fs_type); 692 if (err) 693 goto out; 694 return 0; 695 out: 696 destroy_inodecache(); 697 out1: 698 return err; 699 } 700 701 static void __exit exit_hpfs_fs(void) 702 { 703 unregister_filesystem(&hpfs_fs_type); 704 destroy_inodecache(); 705 } 706 707 module_init(init_hpfs_fs) 708 module_exit(exit_hpfs_fs) 709 MODULE_LICENSE("GPL"); 710