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) 22 { 23 if (hpfs_sb(s)->sb_chkdsk && !(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 brelse(bh); 31 } 32 } 33 } 34 35 /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there 36 were errors) */ 37 38 static void unmark_dirty(struct super_block *s) 39 { 40 struct buffer_head *bh; 41 struct hpfs_spare_block *sb; 42 if (s->s_flags & MS_RDONLY) return; 43 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 44 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; 45 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; 46 mark_buffer_dirty(bh); 47 brelse(bh); 48 } 49 } 50 51 /* Filesystem error... */ 52 static char err_buf[1024]; 53 54 void hpfs_error(struct super_block *s, const char *fmt, ...) 55 { 56 va_list args; 57 58 va_start(args, fmt); 59 vsnprintf(err_buf, sizeof(err_buf), fmt, args); 60 va_end(args); 61 62 printk("HPFS: filesystem error: %s", err_buf); 63 if (!hpfs_sb(s)->sb_was_error) { 64 if (hpfs_sb(s)->sb_err == 2) { 65 printk("; crashing the system because you wanted it\n"); 66 mark_dirty(s); 67 panic("HPFS panic"); 68 } else if (hpfs_sb(s)->sb_err == 1) { 69 if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n"); 70 else { 71 printk("; remounting read-only\n"); 72 mark_dirty(s); 73 s->s_flags |= MS_RDONLY; 74 } 75 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n"); 76 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); 77 } else printk("\n"); 78 hpfs_sb(s)->sb_was_error = 1; 79 } 80 81 /* 82 * A little trick to detect cycles in many hpfs structures and don't let the 83 * kernel crash on corrupted filesystem. When first called, set c2 to 0. 84 * 85 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories 86 * nested each in other, chkdsk locked up happilly. 87 */ 88 89 int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, 90 char *msg) 91 { 92 if (*c2 && *c1 == key) { 93 hpfs_error(s, "cycle detected on key %08x in %s", key, msg); 94 return 1; 95 } 96 (*c2)++; 97 if (!((*c2 - 1) & *c2)) *c1 = key; 98 return 0; 99 } 100 101 static void hpfs_put_super(struct super_block *s) 102 { 103 struct hpfs_sb_info *sbi = hpfs_sb(s); 104 105 kfree(sbi->sb_cp_table); 106 kfree(sbi->sb_bmp_dir); 107 unmark_dirty(s); 108 s->s_fs_info = NULL; 109 kfree(sbi); 110 } 111 112 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) 113 { 114 struct quad_buffer_head qbh; 115 unsigned long *bits; 116 unsigned count; 117 118 bits = hpfs_map_4sectors(s, secno, &qbh, 4); 119 if (!bits) 120 return 0; 121 count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); 122 hpfs_brelse4(&qbh); 123 return count; 124 } 125 126 static unsigned count_bitmaps(struct super_block *s) 127 { 128 unsigned n, count, n_bands; 129 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; 130 count = 0; 131 for (n = 0; n < n_bands; n++) 132 count += hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_bmp_dir[n]); 133 return count; 134 } 135 136 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) 137 { 138 struct super_block *s = dentry->d_sb; 139 struct hpfs_sb_info *sbi = hpfs_sb(s); 140 u64 id = huge_encode_dev(s->s_bdev->bd_dev); 141 hpfs_lock(s); 142 143 /*if (sbi->sb_n_free == -1) {*/ 144 sbi->sb_n_free = count_bitmaps(s); 145 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap); 146 /*}*/ 147 buf->f_type = s->s_magic; 148 buf->f_bsize = 512; 149 buf->f_blocks = sbi->sb_fs_size; 150 buf->f_bfree = sbi->sb_n_free; 151 buf->f_bavail = sbi->sb_n_free; 152 buf->f_files = sbi->sb_dirband_size / 4; 153 buf->f_ffree = sbi->sb_n_free_dnodes; 154 buf->f_fsid.val[0] = (u32)id; 155 buf->f_fsid.val[1] = (u32)(id >> 32); 156 buf->f_namelen = 254; 157 158 hpfs_unlock(s); 159 160 return 0; 161 } 162 163 static struct kmem_cache * hpfs_inode_cachep; 164 165 static struct inode *hpfs_alloc_inode(struct super_block *sb) 166 { 167 struct hpfs_inode_info *ei; 168 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); 169 if (!ei) 170 return NULL; 171 ei->vfs_inode.i_version = 1; 172 return &ei->vfs_inode; 173 } 174 175 static void hpfs_i_callback(struct rcu_head *head) 176 { 177 struct inode *inode = container_of(head, struct inode, i_rcu); 178 INIT_LIST_HEAD(&inode->i_dentry); 179 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 180 } 181 182 static void hpfs_destroy_inode(struct inode *inode) 183 { 184 call_rcu(&inode->i_rcu, hpfs_i_callback); 185 } 186 187 static void init_once(void *foo) 188 { 189 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 190 191 mutex_init(&ei->i_mutex); 192 mutex_init(&ei->i_parent_mutex); 193 inode_init_once(&ei->vfs_inode); 194 } 195 196 static int init_inodecache(void) 197 { 198 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 199 sizeof(struct hpfs_inode_info), 200 0, (SLAB_RECLAIM_ACCOUNT| 201 SLAB_MEM_SPREAD), 202 init_once); 203 if (hpfs_inode_cachep == NULL) 204 return -ENOMEM; 205 return 0; 206 } 207 208 static void destroy_inodecache(void) 209 { 210 kmem_cache_destroy(hpfs_inode_cachep); 211 } 212 213 /* 214 * A tiny parser for option strings, stolen from dosfs. 215 * Stolen again from read-only hpfs. 216 * And updated for table-driven option parsing. 217 */ 218 219 enum { 220 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 221 Opt_conv_binary, Opt_conv_text, Opt_conv_auto, 222 Opt_check_none, Opt_check_normal, Opt_check_strict, 223 Opt_err_cont, Opt_err_ro, Opt_err_panic, 224 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 225 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 226 Opt_timeshift, Opt_err, 227 }; 228 229 static const match_table_t tokens = { 230 {Opt_help, "help"}, 231 {Opt_uid, "uid=%u"}, 232 {Opt_gid, "gid=%u"}, 233 {Opt_umask, "umask=%o"}, 234 {Opt_case_lower, "case=lower"}, 235 {Opt_case_asis, "case=asis"}, 236 {Opt_conv_binary, "conv=binary"}, 237 {Opt_conv_text, "conv=text"}, 238 {Opt_conv_auto, "conv=auto"}, 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 *conv, 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_conv_binary: 299 *conv = CONV_BINARY; 300 break; 301 case Opt_conv_text: 302 *conv = CONV_TEXT; 303 break; 304 case Opt_conv_auto: 305 *conv = CONV_AUTO; 306 break; 307 case Opt_check_none: 308 *chk = 0; 309 break; 310 case Opt_check_normal: 311 *chk = 1; 312 break; 313 case Opt_check_strict: 314 *chk = 2; 315 break; 316 case Opt_err_cont: 317 *errs = 0; 318 break; 319 case Opt_err_ro: 320 *errs = 1; 321 break; 322 case Opt_err_panic: 323 *errs = 2; 324 break; 325 case Opt_eas_no: 326 *eas = 0; 327 break; 328 case Opt_eas_ro: 329 *eas = 1; 330 break; 331 case Opt_eas_rw: 332 *eas = 2; 333 break; 334 case Opt_chkdsk_no: 335 *chkdsk = 0; 336 break; 337 case Opt_chkdsk_errors: 338 *chkdsk = 1; 339 break; 340 case Opt_chkdsk_always: 341 *chkdsk = 2; 342 break; 343 case Opt_timeshift: 344 { 345 int m = 1; 346 char *rhs = args[0].from; 347 if (!rhs || !*rhs) 348 return 0; 349 if (*rhs == '-') m = -1; 350 if (*rhs == '+' || *rhs == '-') rhs++; 351 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 352 if (*rhs) 353 return 0; 354 break; 355 } 356 default: 357 return 0; 358 } 359 } 360 return 1; 361 } 362 363 static inline void hpfs_help(void) 364 { 365 printk("\n\ 366 HPFS filesystem options:\n\ 367 help do not mount and display this text\n\ 368 uid=xxx set uid of files that don't have uid specified in eas\n\ 369 gid=xxx set gid of files that don't have gid specified in eas\n\ 370 umask=xxx set mode of files that don't have mode specified in eas\n\ 371 case=lower lowercase all files\n\ 372 case=asis do not lowercase files (default)\n\ 373 conv=binary do not convert CR/LF -> LF (default)\n\ 374 conv=auto convert only files with known text extensions\n\ 375 conv=text convert all files\n\ 376 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 377 check=normal do some checks - it should not crash (default)\n\ 378 check=strict do extra time-consuming checks, used for debugging\n\ 379 errors=continue continue on errors\n\ 380 errors=remount-ro remount read-only if errors found (default)\n\ 381 errors=panic panic on errors\n\ 382 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 383 chkdsk=errors mark fs dirty if errors found (default)\n\ 384 chkdsk=always always mark fs dirty - used for debugging\n\ 385 eas=no ignore extended attributes\n\ 386 eas=ro read but do not write extended attributes\n\ 387 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 388 timeshift=nnn add nnn seconds to file times\n\ 389 \n"); 390 } 391 392 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 393 { 394 uid_t uid; 395 gid_t gid; 396 umode_t umask; 397 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 398 int o; 399 struct hpfs_sb_info *sbi = hpfs_sb(s); 400 char *new_opts = kstrdup(data, GFP_KERNEL); 401 402 *flags |= MS_NOATIME; 403 404 hpfs_lock(s); 405 lock_super(s); 406 uid = sbi->sb_uid; gid = sbi->sb_gid; 407 umask = 0777 & ~sbi->sb_mode; 408 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv; 409 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 410 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 411 412 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv, 413 &eas, &chk, &errs, &chkdsk, ×hift))) { 414 printk("HPFS: bad mount options.\n"); 415 goto out_err; 416 } 417 if (o == 2) { 418 hpfs_help(); 419 goto out_err; 420 } 421 if (timeshift != sbi->sb_timeshift) { 422 printk("HPFS: timeshift can't be changed using remount.\n"); 423 goto out_err; 424 } 425 426 unmark_dirty(s); 427 428 sbi->sb_uid = uid; sbi->sb_gid = gid; 429 sbi->sb_mode = 0777 & ~umask; 430 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv; 431 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 432 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 433 434 if (!(*flags & MS_RDONLY)) mark_dirty(s); 435 436 replace_mount_options(s, new_opts); 437 438 unlock_super(s); 439 hpfs_unlock(s); 440 return 0; 441 442 out_err: 443 unlock_super(s); 444 hpfs_unlock(s); 445 kfree(new_opts); 446 return -EINVAL; 447 } 448 449 /* Super operations */ 450 451 static const struct super_operations hpfs_sops = 452 { 453 .alloc_inode = hpfs_alloc_inode, 454 .destroy_inode = hpfs_destroy_inode, 455 .evict_inode = hpfs_evict_inode, 456 .put_super = hpfs_put_super, 457 .statfs = hpfs_statfs, 458 .remount_fs = hpfs_remount_fs, 459 .show_options = generic_show_options, 460 }; 461 462 static int hpfs_fill_super(struct super_block *s, void *options, int silent) 463 { 464 struct buffer_head *bh0, *bh1, *bh2; 465 struct hpfs_boot_block *bootblock; 466 struct hpfs_super_block *superblock; 467 struct hpfs_spare_block *spareblock; 468 struct hpfs_sb_info *sbi; 469 struct inode *root; 470 471 uid_t uid; 472 gid_t gid; 473 umode_t umask; 474 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 475 476 dnode_secno root_dno; 477 struct hpfs_dirent *de = NULL; 478 struct quad_buffer_head qbh; 479 480 int o; 481 482 save_mount_options(s, options); 483 484 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 485 if (!sbi) { 486 return -ENOMEM; 487 } 488 s->s_fs_info = sbi; 489 490 sbi->sb_bmp_dir = NULL; 491 sbi->sb_cp_table = NULL; 492 493 mutex_init(&sbi->hpfs_creation_de); 494 495 uid = current_uid(); 496 gid = current_gid(); 497 umask = current_umask(); 498 lowercase = 0; 499 conv = CONV_BINARY; 500 eas = 2; 501 chk = 1; 502 errs = 1; 503 chkdsk = 1; 504 timeshift = 0; 505 506 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv, 507 &eas, &chk, &errs, &chkdsk, ×hift))) { 508 printk("HPFS: bad mount options.\n"); 509 goto bail0; 510 } 511 if (o==2) { 512 hpfs_help(); 513 goto bail0; 514 } 515 516 /*sbi->sb_mounting = 1;*/ 517 sb_set_blocksize(s, 512); 518 sbi->sb_fs_size = -1; 519 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 520 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 521 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 522 523 /* Check magics */ 524 if (/*bootblock->magic != BB_MAGIC 525 ||*/ superblock->magic != SB_MAGIC 526 || spareblock->magic != SP_MAGIC) { 527 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 528 goto bail4; 529 } 530 531 /* Check version */ 532 if (!(s->s_flags & MS_RDONLY) && 533 superblock->funcversion != 2 && superblock->funcversion != 3) { 534 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 535 (int)superblock->version, (int)superblock->funcversion); 536 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"); 537 goto bail4; 538 } 539 540 s->s_flags |= MS_NOATIME; 541 542 /* Fill superblock stuff */ 543 s->s_magic = HPFS_SUPER_MAGIC; 544 s->s_op = &hpfs_sops; 545 s->s_d_op = &hpfs_dentry_operations; 546 547 sbi->sb_root = superblock->root; 548 sbi->sb_fs_size = superblock->n_sectors; 549 sbi->sb_bitmaps = superblock->bitmaps; 550 sbi->sb_dirband_start = superblock->dir_band_start; 551 sbi->sb_dirband_size = superblock->n_dir_band; 552 sbi->sb_dmap = superblock->dir_band_bitmap; 553 sbi->sb_uid = uid; 554 sbi->sb_gid = gid; 555 sbi->sb_mode = 0777 & ~umask; 556 sbi->sb_n_free = -1; 557 sbi->sb_n_free_dnodes = -1; 558 sbi->sb_lowercase = lowercase; 559 sbi->sb_conv = conv; 560 sbi->sb_eas = eas; 561 sbi->sb_chk = chk; 562 sbi->sb_chkdsk = chkdsk; 563 sbi->sb_err = errs; 564 sbi->sb_timeshift = timeshift; 565 sbi->sb_was_error = 0; 566 sbi->sb_cp_table = NULL; 567 sbi->sb_c_bitmap = -1; 568 sbi->sb_max_fwd_alloc = 0xffffff; 569 570 /* Load bitmap directory */ 571 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps))) 572 goto bail4; 573 574 /* Check for general fs errors*/ 575 if (spareblock->dirty && !spareblock->old_wrote) { 576 if (errs == 2) { 577 printk("HPFS: Improperly stopped, not mounted\n"); 578 goto bail4; 579 } 580 hpfs_error(s, "improperly stopped"); 581 } 582 583 if (!(s->s_flags & MS_RDONLY)) { 584 spareblock->dirty = 1; 585 spareblock->old_wrote = 0; 586 mark_buffer_dirty(bh2); 587 } 588 589 if (spareblock->hotfixes_used || spareblock->n_spares_used) { 590 if (errs >= 2) { 591 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 592 mark_dirty(s); 593 goto bail4; 594 } 595 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 596 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 597 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 598 } 599 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) { 600 if (errs >= 2) { 601 printk("HPFS: Spare dnodes used, try chkdsk\n"); 602 mark_dirty(s); 603 goto bail4; 604 } 605 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 606 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 607 } 608 if (chk) { 609 unsigned a; 610 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band || 611 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) { 612 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 613 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band); 614 goto bail4; 615 } 616 a = sbi->sb_dirband_size; 617 sbi->sb_dirband_size = 0; 618 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") || 619 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") || 620 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) { 621 mark_dirty(s); 622 goto bail4; 623 } 624 sbi->sb_dirband_size = a; 625 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 626 627 /* Load code page table */ 628 if (spareblock->n_code_pages) 629 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir))) 630 printk("HPFS: Warning: code page support is disabled\n"); 631 632 brelse(bh2); 633 brelse(bh1); 634 brelse(bh0); 635 636 root = iget_locked(s, sbi->sb_root); 637 if (!root) 638 goto bail0; 639 hpfs_init_inode(root); 640 hpfs_read_inode(root); 641 unlock_new_inode(root); 642 s->s_root = d_alloc_root(root); 643 if (!s->s_root) { 644 iput(root); 645 goto bail0; 646 } 647 648 /* 649 * find the root directory's . pointer & finish filling in the inode 650 */ 651 652 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 653 if (root_dno) 654 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 655 if (!de) 656 hpfs_error(s, "unable to find root dir"); 657 else { 658 root->i_atime.tv_sec = local_to_gmt(s, de->read_date); 659 root->i_atime.tv_nsec = 0; 660 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date); 661 root->i_mtime.tv_nsec = 0; 662 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date); 663 root->i_ctime.tv_nsec = 0; 664 hpfs_i(root)->i_ea_size = de->ea_size; 665 hpfs_i(root)->i_parent_dir = root->i_ino; 666 if (root->i_size == -1) 667 root->i_size = 2048; 668 if (root->i_blocks == -1) 669 root->i_blocks = 5; 670 hpfs_brelse4(&qbh); 671 } 672 return 0; 673 674 bail4: brelse(bh2); 675 bail3: brelse(bh1); 676 bail2: brelse(bh0); 677 bail1: 678 bail0: 679 kfree(sbi->sb_bmp_dir); 680 kfree(sbi->sb_cp_table); 681 s->s_fs_info = NULL; 682 kfree(sbi); 683 return -EINVAL; 684 } 685 686 static struct dentry *hpfs_mount(struct file_system_type *fs_type, 687 int flags, const char *dev_name, void *data) 688 { 689 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); 690 } 691 692 static struct file_system_type hpfs_fs_type = { 693 .owner = THIS_MODULE, 694 .name = "hpfs", 695 .mount = hpfs_mount, 696 .kill_sb = kill_block_super, 697 .fs_flags = FS_REQUIRES_DEV, 698 }; 699 700 static int __init init_hpfs_fs(void) 701 { 702 int err = init_inodecache(); 703 if (err) 704 goto out1; 705 err = register_filesystem(&hpfs_fs_type); 706 if (err) 707 goto out; 708 return 0; 709 out: 710 destroy_inodecache(); 711 out1: 712 return err; 713 } 714 715 static void __exit exit_hpfs_fs(void) 716 { 717 unregister_filesystem(&hpfs_fs_type); 718 destroy_inodecache(); 719 } 720 721 module_init(init_hpfs_fs) 722 module_exit(exit_hpfs_fs) 723 MODULE_LICENSE("GPL"); 724