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 free_sbi(struct hpfs_sb_info *sbi) 105 { 106 kfree(sbi->sb_cp_table); 107 kfree(sbi->sb_bmp_dir); 108 kfree(sbi); 109 } 110 111 static void lazy_free_sbi(struct rcu_head *rcu) 112 { 113 free_sbi(container_of(rcu, struct hpfs_sb_info, rcu)); 114 } 115 116 static void hpfs_put_super(struct super_block *s) 117 { 118 hpfs_lock(s); 119 unmark_dirty(s); 120 hpfs_unlock(s); 121 call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi); 122 } 123 124 static unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) 125 { 126 struct quad_buffer_head qbh; 127 unsigned long *bits; 128 unsigned count; 129 130 bits = hpfs_map_4sectors(s, secno, &qbh, 0); 131 if (!bits) 132 return (unsigned)-1; 133 count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); 134 hpfs_brelse4(&qbh); 135 return count; 136 } 137 138 static unsigned count_bitmaps(struct super_block *s) 139 { 140 unsigned n, count, n_bands; 141 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; 142 count = 0; 143 for (n = 0; n < COUNT_RD_AHEAD; n++) { 144 hpfs_prefetch_bitmap(s, n); 145 } 146 for (n = 0; n < n_bands; n++) { 147 unsigned c; 148 hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD); 149 c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n])); 150 if (c != (unsigned)-1) 151 count += c; 152 } 153 return count; 154 } 155 156 unsigned hpfs_get_free_dnodes(struct super_block *s) 157 { 158 struct hpfs_sb_info *sbi = hpfs_sb(s); 159 if (sbi->sb_n_free_dnodes == (unsigned)-1) { 160 unsigned c = hpfs_count_one_bitmap(s, sbi->sb_dmap); 161 if (c == (unsigned)-1) 162 return 0; 163 sbi->sb_n_free_dnodes = c; 164 } 165 return sbi->sb_n_free_dnodes; 166 } 167 168 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) 169 { 170 struct super_block *s = dentry->d_sb; 171 struct hpfs_sb_info *sbi = hpfs_sb(s); 172 u64 id = huge_encode_dev(s->s_bdev->bd_dev); 173 174 hpfs_lock(s); 175 176 if (sbi->sb_n_free == (unsigned)-1) 177 sbi->sb_n_free = count_bitmaps(s); 178 179 buf->f_type = s->s_magic; 180 buf->f_bsize = 512; 181 buf->f_blocks = sbi->sb_fs_size; 182 buf->f_bfree = sbi->sb_n_free; 183 buf->f_bavail = sbi->sb_n_free; 184 buf->f_files = sbi->sb_dirband_size / 4; 185 buf->f_ffree = hpfs_get_free_dnodes(s); 186 buf->f_fsid.val[0] = (u32)id; 187 buf->f_fsid.val[1] = (u32)(id >> 32); 188 buf->f_namelen = 254; 189 190 hpfs_unlock(s); 191 192 return 0; 193 } 194 195 static struct kmem_cache * hpfs_inode_cachep; 196 197 static struct inode *hpfs_alloc_inode(struct super_block *sb) 198 { 199 struct hpfs_inode_info *ei; 200 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); 201 if (!ei) 202 return NULL; 203 ei->vfs_inode.i_version = 1; 204 return &ei->vfs_inode; 205 } 206 207 static void hpfs_i_callback(struct rcu_head *head) 208 { 209 struct inode *inode = container_of(head, struct inode, i_rcu); 210 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 211 } 212 213 static void hpfs_destroy_inode(struct inode *inode) 214 { 215 call_rcu(&inode->i_rcu, hpfs_i_callback); 216 } 217 218 static void init_once(void *foo) 219 { 220 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 221 222 inode_init_once(&ei->vfs_inode); 223 } 224 225 static int init_inodecache(void) 226 { 227 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 228 sizeof(struct hpfs_inode_info), 229 0, (SLAB_RECLAIM_ACCOUNT| 230 SLAB_MEM_SPREAD), 231 init_once); 232 if (hpfs_inode_cachep == NULL) 233 return -ENOMEM; 234 return 0; 235 } 236 237 static void destroy_inodecache(void) 238 { 239 /* 240 * Make sure all delayed rcu free inodes are flushed before we 241 * destroy cache. 242 */ 243 rcu_barrier(); 244 kmem_cache_destroy(hpfs_inode_cachep); 245 } 246 247 /* 248 * A tiny parser for option strings, stolen from dosfs. 249 * Stolen again from read-only hpfs. 250 * And updated for table-driven option parsing. 251 */ 252 253 enum { 254 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 255 Opt_check_none, Opt_check_normal, Opt_check_strict, 256 Opt_err_cont, Opt_err_ro, Opt_err_panic, 257 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 258 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 259 Opt_timeshift, Opt_err, 260 }; 261 262 static const match_table_t tokens = { 263 {Opt_help, "help"}, 264 {Opt_uid, "uid=%u"}, 265 {Opt_gid, "gid=%u"}, 266 {Opt_umask, "umask=%o"}, 267 {Opt_case_lower, "case=lower"}, 268 {Opt_case_asis, "case=asis"}, 269 {Opt_check_none, "check=none"}, 270 {Opt_check_normal, "check=normal"}, 271 {Opt_check_strict, "check=strict"}, 272 {Opt_err_cont, "errors=continue"}, 273 {Opt_err_ro, "errors=remount-ro"}, 274 {Opt_err_panic, "errors=panic"}, 275 {Opt_eas_no, "eas=no"}, 276 {Opt_eas_ro, "eas=ro"}, 277 {Opt_eas_rw, "eas=rw"}, 278 {Opt_chkdsk_no, "chkdsk=no"}, 279 {Opt_chkdsk_errors, "chkdsk=errors"}, 280 {Opt_chkdsk_always, "chkdsk=always"}, 281 {Opt_timeshift, "timeshift=%d"}, 282 {Opt_err, NULL}, 283 }; 284 285 static int parse_opts(char *opts, kuid_t *uid, kgid_t *gid, umode_t *umask, 286 int *lowercase, int *eas, int *chk, int *errs, 287 int *chkdsk, int *timeshift) 288 { 289 char *p; 290 int option; 291 292 if (!opts) 293 return 1; 294 295 /*printk("Parsing opts: '%s'\n",opts);*/ 296 297 while ((p = strsep(&opts, ",")) != NULL) { 298 substring_t args[MAX_OPT_ARGS]; 299 int token; 300 if (!*p) 301 continue; 302 303 token = match_token(p, tokens, args); 304 switch (token) { 305 case Opt_help: 306 return 2; 307 case Opt_uid: 308 if (match_int(args, &option)) 309 return 0; 310 *uid = make_kuid(current_user_ns(), option); 311 if (!uid_valid(*uid)) 312 return 0; 313 break; 314 case Opt_gid: 315 if (match_int(args, &option)) 316 return 0; 317 *gid = make_kgid(current_user_ns(), option); 318 if (!gid_valid(*gid)) 319 return 0; 320 break; 321 case Opt_umask: 322 if (match_octal(args, &option)) 323 return 0; 324 *umask = option; 325 break; 326 case Opt_case_lower: 327 *lowercase = 1; 328 break; 329 case Opt_case_asis: 330 *lowercase = 0; 331 break; 332 case Opt_check_none: 333 *chk = 0; 334 break; 335 case Opt_check_normal: 336 *chk = 1; 337 break; 338 case Opt_check_strict: 339 *chk = 2; 340 break; 341 case Opt_err_cont: 342 *errs = 0; 343 break; 344 case Opt_err_ro: 345 *errs = 1; 346 break; 347 case Opt_err_panic: 348 *errs = 2; 349 break; 350 case Opt_eas_no: 351 *eas = 0; 352 break; 353 case Opt_eas_ro: 354 *eas = 1; 355 break; 356 case Opt_eas_rw: 357 *eas = 2; 358 break; 359 case Opt_chkdsk_no: 360 *chkdsk = 0; 361 break; 362 case Opt_chkdsk_errors: 363 *chkdsk = 1; 364 break; 365 case Opt_chkdsk_always: 366 *chkdsk = 2; 367 break; 368 case Opt_timeshift: 369 { 370 int m = 1; 371 char *rhs = args[0].from; 372 if (!rhs || !*rhs) 373 return 0; 374 if (*rhs == '-') m = -1; 375 if (*rhs == '+' || *rhs == '-') rhs++; 376 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 377 if (*rhs) 378 return 0; 379 break; 380 } 381 default: 382 return 0; 383 } 384 } 385 return 1; 386 } 387 388 static inline void hpfs_help(void) 389 { 390 printk("\n\ 391 HPFS filesystem options:\n\ 392 help do not mount and display this text\n\ 393 uid=xxx set uid of files that don't have uid specified in eas\n\ 394 gid=xxx set gid of files that don't have gid specified in eas\n\ 395 umask=xxx set mode of files that don't have mode specified in eas\n\ 396 case=lower lowercase all files\n\ 397 case=asis do not lowercase files (default)\n\ 398 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 399 check=normal do some checks - it should not crash (default)\n\ 400 check=strict do extra time-consuming checks, used for debugging\n\ 401 errors=continue continue on errors\n\ 402 errors=remount-ro remount read-only if errors found (default)\n\ 403 errors=panic panic on errors\n\ 404 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 405 chkdsk=errors mark fs dirty if errors found (default)\n\ 406 chkdsk=always always mark fs dirty - used for debugging\n\ 407 eas=no ignore extended attributes\n\ 408 eas=ro read but do not write extended attributes\n\ 409 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 410 timeshift=nnn add nnn seconds to file times\n\ 411 \n"); 412 } 413 414 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 415 { 416 kuid_t uid; 417 kgid_t gid; 418 umode_t umask; 419 int lowercase, eas, chk, errs, chkdsk, timeshift; 420 int o; 421 struct hpfs_sb_info *sbi = hpfs_sb(s); 422 char *new_opts = kstrdup(data, GFP_KERNEL); 423 424 sync_filesystem(s); 425 426 *flags |= MS_NOATIME; 427 428 hpfs_lock(s); 429 uid = sbi->sb_uid; gid = sbi->sb_gid; 430 umask = 0777 & ~sbi->sb_mode; 431 lowercase = sbi->sb_lowercase; 432 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 433 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 434 435 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, 436 &eas, &chk, &errs, &chkdsk, ×hift))) { 437 printk("HPFS: bad mount options.\n"); 438 goto out_err; 439 } 440 if (o == 2) { 441 hpfs_help(); 442 goto out_err; 443 } 444 if (timeshift != sbi->sb_timeshift) { 445 printk("HPFS: timeshift can't be changed using remount.\n"); 446 goto out_err; 447 } 448 449 unmark_dirty(s); 450 451 sbi->sb_uid = uid; sbi->sb_gid = gid; 452 sbi->sb_mode = 0777 & ~umask; 453 sbi->sb_lowercase = lowercase; 454 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 455 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 456 457 if (!(*flags & MS_RDONLY)) mark_dirty(s, 1); 458 459 replace_mount_options(s, new_opts); 460 461 hpfs_unlock(s); 462 return 0; 463 464 out_err: 465 hpfs_unlock(s); 466 kfree(new_opts); 467 return -EINVAL; 468 } 469 470 /* Super operations */ 471 472 static const struct super_operations hpfs_sops = 473 { 474 .alloc_inode = hpfs_alloc_inode, 475 .destroy_inode = hpfs_destroy_inode, 476 .evict_inode = hpfs_evict_inode, 477 .put_super = hpfs_put_super, 478 .statfs = hpfs_statfs, 479 .remount_fs = hpfs_remount_fs, 480 .show_options = generic_show_options, 481 }; 482 483 static int hpfs_fill_super(struct super_block *s, void *options, int silent) 484 { 485 struct buffer_head *bh0, *bh1, *bh2; 486 struct hpfs_boot_block *bootblock; 487 struct hpfs_super_block *superblock; 488 struct hpfs_spare_block *spareblock; 489 struct hpfs_sb_info *sbi; 490 struct inode *root; 491 492 kuid_t uid; 493 kgid_t gid; 494 umode_t umask; 495 int lowercase, eas, chk, errs, chkdsk, timeshift; 496 497 dnode_secno root_dno; 498 struct hpfs_dirent *de = NULL; 499 struct quad_buffer_head qbh; 500 501 int o; 502 503 save_mount_options(s, options); 504 505 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 506 if (!sbi) { 507 return -ENOMEM; 508 } 509 s->s_fs_info = sbi; 510 511 mutex_init(&sbi->hpfs_mutex); 512 hpfs_lock(s); 513 514 uid = current_uid(); 515 gid = current_gid(); 516 umask = current_umask(); 517 lowercase = 0; 518 eas = 2; 519 chk = 1; 520 errs = 1; 521 chkdsk = 1; 522 timeshift = 0; 523 524 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, 525 &eas, &chk, &errs, &chkdsk, ×hift))) { 526 printk("HPFS: bad mount options.\n"); 527 goto bail0; 528 } 529 if (o==2) { 530 hpfs_help(); 531 goto bail0; 532 } 533 534 /*sbi->sb_mounting = 1;*/ 535 sb_set_blocksize(s, 512); 536 sbi->sb_fs_size = -1; 537 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 538 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 539 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 540 541 /* Check magics */ 542 if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC 543 ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC 544 || le32_to_cpu(spareblock->magic) != SP_MAGIC) { 545 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 546 goto bail4; 547 } 548 549 /* Check version */ 550 if (!(s->s_flags & MS_RDONLY) && 551 superblock->funcversion != 2 && superblock->funcversion != 3) { 552 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 553 (int)superblock->version, (int)superblock->funcversion); 554 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"); 555 goto bail4; 556 } 557 558 s->s_flags |= MS_NOATIME; 559 560 /* Fill superblock stuff */ 561 s->s_magic = HPFS_SUPER_MAGIC; 562 s->s_op = &hpfs_sops; 563 s->s_d_op = &hpfs_dentry_operations; 564 565 sbi->sb_root = le32_to_cpu(superblock->root); 566 sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors); 567 sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps); 568 sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start); 569 sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band); 570 sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap); 571 sbi->sb_uid = uid; 572 sbi->sb_gid = gid; 573 sbi->sb_mode = 0777 & ~umask; 574 sbi->sb_n_free = -1; 575 sbi->sb_n_free_dnodes = -1; 576 sbi->sb_lowercase = lowercase; 577 sbi->sb_eas = eas; 578 sbi->sb_chk = chk; 579 sbi->sb_chkdsk = chkdsk; 580 sbi->sb_err = errs; 581 sbi->sb_timeshift = timeshift; 582 sbi->sb_was_error = 0; 583 sbi->sb_cp_table = NULL; 584 sbi->sb_c_bitmap = -1; 585 sbi->sb_max_fwd_alloc = 0xffffff; 586 587 if (sbi->sb_fs_size >= 0x80000000) { 588 hpfs_error(s, "invalid size in superblock: %08x", 589 (unsigned)sbi->sb_fs_size); 590 goto bail4; 591 } 592 593 /* Load bitmap directory */ 594 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps)))) 595 goto bail4; 596 597 /* Check for general fs errors*/ 598 if (spareblock->dirty && !spareblock->old_wrote) { 599 if (errs == 2) { 600 printk("HPFS: Improperly stopped, not mounted\n"); 601 goto bail4; 602 } 603 hpfs_error(s, "improperly stopped"); 604 } 605 606 if (!(s->s_flags & MS_RDONLY)) { 607 spareblock->dirty = 1; 608 spareblock->old_wrote = 0; 609 mark_buffer_dirty(bh2); 610 } 611 612 if (spareblock->hotfixes_used || spareblock->n_spares_used) { 613 if (errs >= 2) { 614 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 615 mark_dirty(s, 0); 616 goto bail4; 617 } 618 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 619 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 620 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 621 } 622 if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) { 623 if (errs >= 2) { 624 printk("HPFS: Spare dnodes used, try chkdsk\n"); 625 mark_dirty(s, 0); 626 goto bail4; 627 } 628 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 629 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 630 } 631 if (chk) { 632 unsigned a; 633 if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) || 634 le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) { 635 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 636 le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band)); 637 goto bail4; 638 } 639 a = sbi->sb_dirband_size; 640 sbi->sb_dirband_size = 0; 641 if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") || 642 hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") || 643 hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) { 644 mark_dirty(s, 0); 645 goto bail4; 646 } 647 sbi->sb_dirband_size = a; 648 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 649 650 /* Load code page table */ 651 if (le32_to_cpu(spareblock->n_code_pages)) 652 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir)))) 653 printk("HPFS: Warning: code page support is disabled\n"); 654 655 brelse(bh2); 656 brelse(bh1); 657 brelse(bh0); 658 659 root = iget_locked(s, sbi->sb_root); 660 if (!root) 661 goto bail0; 662 hpfs_init_inode(root); 663 hpfs_read_inode(root); 664 unlock_new_inode(root); 665 s->s_root = d_make_root(root); 666 if (!s->s_root) 667 goto bail0; 668 669 /* 670 * find the root directory's . pointer & finish filling in the inode 671 */ 672 673 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 674 if (root_dno) 675 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 676 if (!de) 677 hpfs_error(s, "unable to find root dir"); 678 else { 679 root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date)); 680 root->i_atime.tv_nsec = 0; 681 root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date)); 682 root->i_mtime.tv_nsec = 0; 683 root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date)); 684 root->i_ctime.tv_nsec = 0; 685 hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size); 686 hpfs_i(root)->i_parent_dir = root->i_ino; 687 if (root->i_size == -1) 688 root->i_size = 2048; 689 if (root->i_blocks == -1) 690 root->i_blocks = 5; 691 hpfs_brelse4(&qbh); 692 } 693 hpfs_unlock(s); 694 return 0; 695 696 bail4: brelse(bh2); 697 bail3: brelse(bh1); 698 bail2: brelse(bh0); 699 bail1: 700 bail0: 701 hpfs_unlock(s); 702 free_sbi(sbi); 703 return -EINVAL; 704 } 705 706 static struct dentry *hpfs_mount(struct file_system_type *fs_type, 707 int flags, const char *dev_name, void *data) 708 { 709 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); 710 } 711 712 static struct file_system_type hpfs_fs_type = { 713 .owner = THIS_MODULE, 714 .name = "hpfs", 715 .mount = hpfs_mount, 716 .kill_sb = kill_block_super, 717 .fs_flags = FS_REQUIRES_DEV, 718 }; 719 MODULE_ALIAS_FS("hpfs"); 720 721 static int __init init_hpfs_fs(void) 722 { 723 int err = init_inodecache(); 724 if (err) 725 goto out1; 726 err = register_filesystem(&hpfs_fs_type); 727 if (err) 728 goto out; 729 return 0; 730 out: 731 destroy_inodecache(); 732 out1: 733 return err; 734 } 735 736 static void __exit exit_hpfs_fs(void) 737 { 738 unregister_filesystem(&hpfs_fs_type); 739 destroy_inodecache(); 740 } 741 742 module_init(init_hpfs_fs) 743 module_exit(exit_hpfs_fs) 744 MODULE_LICENSE("GPL"); 745