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 INIT_LIST_HEAD(&inode->i_dentry); 185 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 186 } 187 188 static void hpfs_destroy_inode(struct inode *inode) 189 { 190 call_rcu(&inode->i_rcu, hpfs_i_callback); 191 } 192 193 static void init_once(void *foo) 194 { 195 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 196 197 inode_init_once(&ei->vfs_inode); 198 } 199 200 static int init_inodecache(void) 201 { 202 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 203 sizeof(struct hpfs_inode_info), 204 0, (SLAB_RECLAIM_ACCOUNT| 205 SLAB_MEM_SPREAD), 206 init_once); 207 if (hpfs_inode_cachep == NULL) 208 return -ENOMEM; 209 return 0; 210 } 211 212 static void destroy_inodecache(void) 213 { 214 kmem_cache_destroy(hpfs_inode_cachep); 215 } 216 217 /* 218 * A tiny parser for option strings, stolen from dosfs. 219 * Stolen again from read-only hpfs. 220 * And updated for table-driven option parsing. 221 */ 222 223 enum { 224 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 225 Opt_check_none, Opt_check_normal, Opt_check_strict, 226 Opt_err_cont, Opt_err_ro, Opt_err_panic, 227 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 228 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 229 Opt_timeshift, Opt_err, 230 }; 231 232 static const match_table_t tokens = { 233 {Opt_help, "help"}, 234 {Opt_uid, "uid=%u"}, 235 {Opt_gid, "gid=%u"}, 236 {Opt_umask, "umask=%o"}, 237 {Opt_case_lower, "case=lower"}, 238 {Opt_case_asis, "case=asis"}, 239 {Opt_check_none, "check=none"}, 240 {Opt_check_normal, "check=normal"}, 241 {Opt_check_strict, "check=strict"}, 242 {Opt_err_cont, "errors=continue"}, 243 {Opt_err_ro, "errors=remount-ro"}, 244 {Opt_err_panic, "errors=panic"}, 245 {Opt_eas_no, "eas=no"}, 246 {Opt_eas_ro, "eas=ro"}, 247 {Opt_eas_rw, "eas=rw"}, 248 {Opt_chkdsk_no, "chkdsk=no"}, 249 {Opt_chkdsk_errors, "chkdsk=errors"}, 250 {Opt_chkdsk_always, "chkdsk=always"}, 251 {Opt_timeshift, "timeshift=%d"}, 252 {Opt_err, NULL}, 253 }; 254 255 static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, 256 int *lowercase, int *eas, int *chk, int *errs, 257 int *chkdsk, int *timeshift) 258 { 259 char *p; 260 int option; 261 262 if (!opts) 263 return 1; 264 265 /*printk("Parsing opts: '%s'\n",opts);*/ 266 267 while ((p = strsep(&opts, ",")) != NULL) { 268 substring_t args[MAX_OPT_ARGS]; 269 int token; 270 if (!*p) 271 continue; 272 273 token = match_token(p, tokens, args); 274 switch (token) { 275 case Opt_help: 276 return 2; 277 case Opt_uid: 278 if (match_int(args, &option)) 279 return 0; 280 *uid = option; 281 break; 282 case Opt_gid: 283 if (match_int(args, &option)) 284 return 0; 285 *gid = option; 286 break; 287 case Opt_umask: 288 if (match_octal(args, &option)) 289 return 0; 290 *umask = option; 291 break; 292 case Opt_case_lower: 293 *lowercase = 1; 294 break; 295 case Opt_case_asis: 296 *lowercase = 0; 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 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 365 check=normal do some checks - it should not crash (default)\n\ 366 check=strict do extra time-consuming checks, used for debugging\n\ 367 errors=continue continue on errors\n\ 368 errors=remount-ro remount read-only if errors found (default)\n\ 369 errors=panic panic on errors\n\ 370 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 371 chkdsk=errors mark fs dirty if errors found (default)\n\ 372 chkdsk=always always mark fs dirty - used for debugging\n\ 373 eas=no ignore extended attributes\n\ 374 eas=ro read but do not write extended attributes\n\ 375 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 376 timeshift=nnn add nnn seconds to file times\n\ 377 \n"); 378 } 379 380 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 381 { 382 uid_t uid; 383 gid_t gid; 384 umode_t umask; 385 int lowercase, eas, chk, errs, chkdsk, timeshift; 386 int o; 387 struct hpfs_sb_info *sbi = hpfs_sb(s); 388 char *new_opts = kstrdup(data, GFP_KERNEL); 389 390 *flags |= MS_NOATIME; 391 392 hpfs_lock(s); 393 lock_super(s); 394 uid = sbi->sb_uid; gid = sbi->sb_gid; 395 umask = 0777 & ~sbi->sb_mode; 396 lowercase = sbi->sb_lowercase; 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, 401 &eas, &chk, &errs, &chkdsk, ×hift))) { 402 printk("HPFS: bad mount options.\n"); 403 goto out_err; 404 } 405 if (o == 2) { 406 hpfs_help(); 407 goto out_err; 408 } 409 if (timeshift != sbi->sb_timeshift) { 410 printk("HPFS: timeshift can't be changed using remount.\n"); 411 goto out_err; 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; 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, 1); 423 424 replace_mount_options(s, new_opts); 425 426 unlock_super(s); 427 hpfs_unlock(s); 428 return 0; 429 430 out_err: 431 unlock_super(s); 432 hpfs_unlock(s); 433 kfree(new_opts); 434 return -EINVAL; 435 } 436 437 /* Super operations */ 438 439 static const struct super_operations hpfs_sops = 440 { 441 .alloc_inode = hpfs_alloc_inode, 442 .destroy_inode = hpfs_destroy_inode, 443 .evict_inode = hpfs_evict_inode, 444 .put_super = hpfs_put_super, 445 .statfs = hpfs_statfs, 446 .remount_fs = hpfs_remount_fs, 447 .show_options = generic_show_options, 448 }; 449 450 static int hpfs_fill_super(struct super_block *s, void *options, int silent) 451 { 452 struct buffer_head *bh0, *bh1, *bh2; 453 struct hpfs_boot_block *bootblock; 454 struct hpfs_super_block *superblock; 455 struct hpfs_spare_block *spareblock; 456 struct hpfs_sb_info *sbi; 457 struct inode *root; 458 459 uid_t uid; 460 gid_t gid; 461 umode_t umask; 462 int lowercase, eas, chk, errs, chkdsk, timeshift; 463 464 dnode_secno root_dno; 465 struct hpfs_dirent *de = NULL; 466 struct quad_buffer_head qbh; 467 468 int o; 469 470 save_mount_options(s, options); 471 472 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 473 if (!sbi) { 474 return -ENOMEM; 475 } 476 s->s_fs_info = sbi; 477 478 sbi->sb_bmp_dir = NULL; 479 sbi->sb_cp_table = NULL; 480 481 mutex_init(&sbi->hpfs_mutex); 482 hpfs_lock(s); 483 484 uid = current_uid(); 485 gid = current_gid(); 486 umask = current_umask(); 487 lowercase = 0; 488 eas = 2; 489 chk = 1; 490 errs = 1; 491 chkdsk = 1; 492 timeshift = 0; 493 494 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, 495 &eas, &chk, &errs, &chkdsk, ×hift))) { 496 printk("HPFS: bad mount options.\n"); 497 goto bail0; 498 } 499 if (o==2) { 500 hpfs_help(); 501 goto bail0; 502 } 503 504 /*sbi->sb_mounting = 1;*/ 505 sb_set_blocksize(s, 512); 506 sbi->sb_fs_size = -1; 507 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 508 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 509 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 510 511 /* Check magics */ 512 if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC 513 ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC 514 || le32_to_cpu(spareblock->magic) != SP_MAGIC) { 515 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 516 goto bail4; 517 } 518 519 /* Check version */ 520 if (!(s->s_flags & MS_RDONLY) && 521 superblock->funcversion != 2 && superblock->funcversion != 3) { 522 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 523 (int)superblock->version, (int)superblock->funcversion); 524 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"); 525 goto bail4; 526 } 527 528 s->s_flags |= MS_NOATIME; 529 530 /* Fill superblock stuff */ 531 s->s_magic = HPFS_SUPER_MAGIC; 532 s->s_op = &hpfs_sops; 533 s->s_d_op = &hpfs_dentry_operations; 534 535 sbi->sb_root = le32_to_cpu(superblock->root); 536 sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors); 537 sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps); 538 sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start); 539 sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band); 540 sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap); 541 sbi->sb_uid = uid; 542 sbi->sb_gid = gid; 543 sbi->sb_mode = 0777 & ~umask; 544 sbi->sb_n_free = -1; 545 sbi->sb_n_free_dnodes = -1; 546 sbi->sb_lowercase = lowercase; 547 sbi->sb_eas = eas; 548 sbi->sb_chk = chk; 549 sbi->sb_chkdsk = chkdsk; 550 sbi->sb_err = errs; 551 sbi->sb_timeshift = timeshift; 552 sbi->sb_was_error = 0; 553 sbi->sb_cp_table = NULL; 554 sbi->sb_c_bitmap = -1; 555 sbi->sb_max_fwd_alloc = 0xffffff; 556 557 /* Load bitmap directory */ 558 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps)))) 559 goto bail4; 560 561 /* Check for general fs errors*/ 562 if (spareblock->dirty && !spareblock->old_wrote) { 563 if (errs == 2) { 564 printk("HPFS: Improperly stopped, not mounted\n"); 565 goto bail4; 566 } 567 hpfs_error(s, "improperly stopped"); 568 } 569 570 if (!(s->s_flags & MS_RDONLY)) { 571 spareblock->dirty = 1; 572 spareblock->old_wrote = 0; 573 mark_buffer_dirty(bh2); 574 } 575 576 if (le32_to_cpu(spareblock->hotfixes_used) || le32_to_cpu(spareblock->n_spares_used)) { 577 if (errs >= 2) { 578 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 579 mark_dirty(s, 0); 580 goto bail4; 581 } 582 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 583 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 584 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 585 } 586 if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) { 587 if (errs >= 2) { 588 printk("HPFS: Spare dnodes used, try chkdsk\n"); 589 mark_dirty(s, 0); 590 goto bail4; 591 } 592 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 593 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 594 } 595 if (chk) { 596 unsigned a; 597 if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) || 598 le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) { 599 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 600 le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band)); 601 goto bail4; 602 } 603 a = sbi->sb_dirband_size; 604 sbi->sb_dirband_size = 0; 605 if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") || 606 hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") || 607 hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) { 608 mark_dirty(s, 0); 609 goto bail4; 610 } 611 sbi->sb_dirband_size = a; 612 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 613 614 /* Load code page table */ 615 if (le32_to_cpu(spareblock->n_code_pages)) 616 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir)))) 617 printk("HPFS: Warning: code page support is disabled\n"); 618 619 brelse(bh2); 620 brelse(bh1); 621 brelse(bh0); 622 623 root = iget_locked(s, sbi->sb_root); 624 if (!root) 625 goto bail0; 626 hpfs_init_inode(root); 627 hpfs_read_inode(root); 628 unlock_new_inode(root); 629 s->s_root = d_alloc_root(root); 630 if (!s->s_root) { 631 iput(root); 632 goto bail0; 633 } 634 635 /* 636 * find the root directory's . pointer & finish filling in the inode 637 */ 638 639 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 640 if (root_dno) 641 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 642 if (!de) 643 hpfs_error(s, "unable to find root dir"); 644 else { 645 root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date)); 646 root->i_atime.tv_nsec = 0; 647 root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date)); 648 root->i_mtime.tv_nsec = 0; 649 root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date)); 650 root->i_ctime.tv_nsec = 0; 651 hpfs_i(root)->i_ea_size = le16_to_cpu(de->ea_size); 652 hpfs_i(root)->i_parent_dir = root->i_ino; 653 if (root->i_size == -1) 654 root->i_size = 2048; 655 if (root->i_blocks == -1) 656 root->i_blocks = 5; 657 hpfs_brelse4(&qbh); 658 } 659 hpfs_unlock(s); 660 return 0; 661 662 bail4: brelse(bh2); 663 bail3: brelse(bh1); 664 bail2: brelse(bh0); 665 bail1: 666 bail0: 667 hpfs_unlock(s); 668 kfree(sbi->sb_bmp_dir); 669 kfree(sbi->sb_cp_table); 670 s->s_fs_info = NULL; 671 kfree(sbi); 672 return -EINVAL; 673 } 674 675 static struct dentry *hpfs_mount(struct file_system_type *fs_type, 676 int flags, const char *dev_name, void *data) 677 { 678 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); 679 } 680 681 static struct file_system_type hpfs_fs_type = { 682 .owner = THIS_MODULE, 683 .name = "hpfs", 684 .mount = hpfs_mount, 685 .kill_sb = kill_block_super, 686 .fs_flags = FS_REQUIRES_DEV, 687 }; 688 689 static int __init init_hpfs_fs(void) 690 { 691 int err = init_inodecache(); 692 if (err) 693 goto out1; 694 err = register_filesystem(&hpfs_fs_type); 695 if (err) 696 goto out; 697 return 0; 698 out: 699 destroy_inodecache(); 700 out1: 701 return err; 702 } 703 704 static void __exit exit_hpfs_fs(void) 705 { 706 unregister_filesystem(&hpfs_fs_type); 707 destroy_inodecache(); 708 } 709 710 module_init(init_hpfs_fs) 711 module_exit(exit_hpfs_fs) 712 MODULE_LICENSE("GPL"); 713