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 17 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ 18 19 static void mark_dirty(struct super_block *s) 20 { 21 if (hpfs_sb(s)->sb_chkdsk && !(s->s_flags & MS_RDONLY)) { 22 struct buffer_head *bh; 23 struct hpfs_spare_block *sb; 24 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 25 sb->dirty = 1; 26 sb->old_wrote = 0; 27 mark_buffer_dirty(bh); 28 brelse(bh); 29 } 30 } 31 } 32 33 /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there 34 were errors) */ 35 36 static void unmark_dirty(struct super_block *s) 37 { 38 struct buffer_head *bh; 39 struct hpfs_spare_block *sb; 40 if (s->s_flags & MS_RDONLY) return; 41 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 42 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; 43 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; 44 mark_buffer_dirty(bh); 45 brelse(bh); 46 } 47 } 48 49 /* Filesystem error... */ 50 static char err_buf[1024]; 51 52 void hpfs_error(struct super_block *s, const char *fmt, ...) 53 { 54 va_list args; 55 56 va_start(args, fmt); 57 vsnprintf(err_buf, sizeof(err_buf), fmt, args); 58 va_end(args); 59 60 printk("HPFS: filesystem error: %s", err_buf); 61 if (!hpfs_sb(s)->sb_was_error) { 62 if (hpfs_sb(s)->sb_err == 2) { 63 printk("; crashing the system because you wanted it\n"); 64 mark_dirty(s); 65 panic("HPFS panic"); 66 } else if (hpfs_sb(s)->sb_err == 1) { 67 if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n"); 68 else { 69 printk("; remounting read-only\n"); 70 mark_dirty(s); 71 s->s_flags |= MS_RDONLY; 72 } 73 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n"); 74 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); 75 } else printk("\n"); 76 hpfs_sb(s)->sb_was_error = 1; 77 } 78 79 /* 80 * A little trick to detect cycles in many hpfs structures and don't let the 81 * kernel crash on corrupted filesystem. When first called, set c2 to 0. 82 * 83 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories 84 * nested each in other, chkdsk locked up happilly. 85 */ 86 87 int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, 88 char *msg) 89 { 90 if (*c2 && *c1 == key) { 91 hpfs_error(s, "cycle detected on key %08x in %s", key, msg); 92 return 1; 93 } 94 (*c2)++; 95 if (!((*c2 - 1) & *c2)) *c1 = key; 96 return 0; 97 } 98 99 static void hpfs_put_super(struct super_block *s) 100 { 101 struct hpfs_sb_info *sbi = hpfs_sb(s); 102 kfree(sbi->sb_cp_table); 103 kfree(sbi->sb_bmp_dir); 104 unmark_dirty(s); 105 s->s_fs_info = NULL; 106 kfree(sbi); 107 } 108 109 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) 110 { 111 struct quad_buffer_head qbh; 112 unsigned *bits; 113 unsigned i, count; 114 if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0; 115 count = 0; 116 for (i = 0; i < 2048 / sizeof(unsigned); i++) { 117 unsigned b; 118 if (!bits[i]) continue; 119 for (b = bits[i]; b; b>>=1) count += b & 1; 120 } 121 hpfs_brelse4(&qbh); 122 return count; 123 } 124 125 static unsigned count_bitmaps(struct super_block *s) 126 { 127 unsigned n, count, n_bands; 128 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; 129 count = 0; 130 for (n = 0; n < n_bands; n++) 131 count += hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_bmp_dir[n]); 132 return count; 133 } 134 135 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) 136 { 137 struct super_block *s = dentry->d_sb; 138 struct hpfs_sb_info *sbi = hpfs_sb(s); 139 u64 id = huge_encode_dev(s->s_bdev->bd_dev); 140 lock_kernel(); 141 142 /*if (sbi->sb_n_free == -1) {*/ 143 sbi->sb_n_free = count_bitmaps(s); 144 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap); 145 /*}*/ 146 buf->f_type = s->s_magic; 147 buf->f_bsize = 512; 148 buf->f_blocks = sbi->sb_fs_size; 149 buf->f_bfree = sbi->sb_n_free; 150 buf->f_bavail = sbi->sb_n_free; 151 buf->f_files = sbi->sb_dirband_size / 4; 152 buf->f_ffree = sbi->sb_n_free_dnodes; 153 buf->f_fsid.val[0] = (u32)id; 154 buf->f_fsid.val[1] = (u32)(id >> 32); 155 buf->f_namelen = 254; 156 157 unlock_kernel(); 158 159 return 0; 160 } 161 162 static struct kmem_cache * hpfs_inode_cachep; 163 164 static struct inode *hpfs_alloc_inode(struct super_block *sb) 165 { 166 struct hpfs_inode_info *ei; 167 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); 168 if (!ei) 169 return NULL; 170 ei->vfs_inode.i_version = 1; 171 return &ei->vfs_inode; 172 } 173 174 static void hpfs_destroy_inode(struct inode *inode) 175 { 176 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 177 } 178 179 static void init_once(void *foo) 180 { 181 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 182 183 mutex_init(&ei->i_mutex); 184 mutex_init(&ei->i_parent_mutex); 185 inode_init_once(&ei->vfs_inode); 186 } 187 188 static int init_inodecache(void) 189 { 190 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 191 sizeof(struct hpfs_inode_info), 192 0, (SLAB_RECLAIM_ACCOUNT| 193 SLAB_MEM_SPREAD), 194 init_once); 195 if (hpfs_inode_cachep == NULL) 196 return -ENOMEM; 197 return 0; 198 } 199 200 static void destroy_inodecache(void) 201 { 202 kmem_cache_destroy(hpfs_inode_cachep); 203 } 204 205 /* 206 * A tiny parser for option strings, stolen from dosfs. 207 * Stolen again from read-only hpfs. 208 * And updated for table-driven option parsing. 209 */ 210 211 enum { 212 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 213 Opt_conv_binary, Opt_conv_text, Opt_conv_auto, 214 Opt_check_none, Opt_check_normal, Opt_check_strict, 215 Opt_err_cont, Opt_err_ro, Opt_err_panic, 216 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 217 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 218 Opt_timeshift, Opt_err, 219 }; 220 221 static const match_table_t tokens = { 222 {Opt_help, "help"}, 223 {Opt_uid, "uid=%u"}, 224 {Opt_gid, "gid=%u"}, 225 {Opt_umask, "umask=%o"}, 226 {Opt_case_lower, "case=lower"}, 227 {Opt_case_asis, "case=asis"}, 228 {Opt_conv_binary, "conv=binary"}, 229 {Opt_conv_text, "conv=text"}, 230 {Opt_conv_auto, "conv=auto"}, 231 {Opt_check_none, "check=none"}, 232 {Opt_check_normal, "check=normal"}, 233 {Opt_check_strict, "check=strict"}, 234 {Opt_err_cont, "errors=continue"}, 235 {Opt_err_ro, "errors=remount-ro"}, 236 {Opt_err_panic, "errors=panic"}, 237 {Opt_eas_no, "eas=no"}, 238 {Opt_eas_ro, "eas=ro"}, 239 {Opt_eas_rw, "eas=rw"}, 240 {Opt_chkdsk_no, "chkdsk=no"}, 241 {Opt_chkdsk_errors, "chkdsk=errors"}, 242 {Opt_chkdsk_always, "chkdsk=always"}, 243 {Opt_timeshift, "timeshift=%d"}, 244 {Opt_err, NULL}, 245 }; 246 247 static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, 248 int *lowercase, int *conv, int *eas, int *chk, int *errs, 249 int *chkdsk, int *timeshift) 250 { 251 char *p; 252 int option; 253 254 if (!opts) 255 return 1; 256 257 /*printk("Parsing opts: '%s'\n",opts);*/ 258 259 while ((p = strsep(&opts, ",")) != NULL) { 260 substring_t args[MAX_OPT_ARGS]; 261 int token; 262 if (!*p) 263 continue; 264 265 token = match_token(p, tokens, args); 266 switch (token) { 267 case Opt_help: 268 return 2; 269 case Opt_uid: 270 if (match_int(args, &option)) 271 return 0; 272 *uid = option; 273 break; 274 case Opt_gid: 275 if (match_int(args, &option)) 276 return 0; 277 *gid = option; 278 break; 279 case Opt_umask: 280 if (match_octal(args, &option)) 281 return 0; 282 *umask = option; 283 break; 284 case Opt_case_lower: 285 *lowercase = 1; 286 break; 287 case Opt_case_asis: 288 *lowercase = 0; 289 break; 290 case Opt_conv_binary: 291 *conv = CONV_BINARY; 292 break; 293 case Opt_conv_text: 294 *conv = CONV_TEXT; 295 break; 296 case Opt_conv_auto: 297 *conv = CONV_AUTO; 298 break; 299 case Opt_check_none: 300 *chk = 0; 301 break; 302 case Opt_check_normal: 303 *chk = 1; 304 break; 305 case Opt_check_strict: 306 *chk = 2; 307 break; 308 case Opt_err_cont: 309 *errs = 0; 310 break; 311 case Opt_err_ro: 312 *errs = 1; 313 break; 314 case Opt_err_panic: 315 *errs = 2; 316 break; 317 case Opt_eas_no: 318 *eas = 0; 319 break; 320 case Opt_eas_ro: 321 *eas = 1; 322 break; 323 case Opt_eas_rw: 324 *eas = 2; 325 break; 326 case Opt_chkdsk_no: 327 *chkdsk = 0; 328 break; 329 case Opt_chkdsk_errors: 330 *chkdsk = 1; 331 break; 332 case Opt_chkdsk_always: 333 *chkdsk = 2; 334 break; 335 case Opt_timeshift: 336 { 337 int m = 1; 338 char *rhs = args[0].from; 339 if (!rhs || !*rhs) 340 return 0; 341 if (*rhs == '-') m = -1; 342 if (*rhs == '+' || *rhs == '-') rhs++; 343 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 344 if (*rhs) 345 return 0; 346 break; 347 } 348 default: 349 return 0; 350 } 351 } 352 return 1; 353 } 354 355 static inline void hpfs_help(void) 356 { 357 printk("\n\ 358 HPFS filesystem options:\n\ 359 help do not mount and display this text\n\ 360 uid=xxx set uid of files that don't have uid specified in eas\n\ 361 gid=xxx set gid of files that don't have gid specified in eas\n\ 362 umask=xxx set mode of files that don't have mode specified in eas\n\ 363 case=lower lowercase all files\n\ 364 case=asis do not lowercase files (default)\n\ 365 conv=binary do not convert CR/LF -> LF (default)\n\ 366 conv=auto convert only files with known text extensions\n\ 367 conv=text convert all files\n\ 368 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 369 check=normal do some checks - it should not crash (default)\n\ 370 check=strict do extra time-consuming checks, used for debugging\n\ 371 errors=continue continue on errors\n\ 372 errors=remount-ro remount read-only if errors found (default)\n\ 373 errors=panic panic on errors\n\ 374 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 375 chkdsk=errors mark fs dirty if errors found (default)\n\ 376 chkdsk=always always mark fs dirty - used for debugging\n\ 377 eas=no ignore extended attributes\n\ 378 eas=ro read but do not write extended attributes\n\ 379 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 380 timeshift=nnn add nnn seconds to file times\n\ 381 \n"); 382 } 383 384 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 385 { 386 uid_t uid; 387 gid_t gid; 388 umode_t umask; 389 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 390 int o; 391 struct hpfs_sb_info *sbi = hpfs_sb(s); 392 char *new_opts = kstrdup(data, GFP_KERNEL); 393 394 *flags |= MS_NOATIME; 395 396 uid = sbi->sb_uid; gid = sbi->sb_gid; 397 umask = 0777 & ~sbi->sb_mode; 398 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv; 399 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 400 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 401 402 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv, 403 &eas, &chk, &errs, &chkdsk, ×hift))) { 404 printk("HPFS: bad mount options.\n"); 405 goto out_err; 406 } 407 if (o == 2) { 408 hpfs_help(); 409 goto out_err; 410 } 411 if (timeshift != sbi->sb_timeshift) { 412 printk("HPFS: timeshift can't be changed using remount.\n"); 413 goto out_err; 414 } 415 416 unmark_dirty(s); 417 418 sbi->sb_uid = uid; sbi->sb_gid = gid; 419 sbi->sb_mode = 0777 & ~umask; 420 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv; 421 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 422 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 423 424 if (!(*flags & MS_RDONLY)) mark_dirty(s); 425 426 kfree(s->s_options); 427 s->s_options = new_opts; 428 429 return 0; 430 431 out_err: 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 .delete_inode = hpfs_delete_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, conv, 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 s->s_fs_info = sbi; 475 476 sbi->sb_bmp_dir = NULL; 477 sbi->sb_cp_table = NULL; 478 479 init_MUTEX(&sbi->hpfs_creation_de); 480 481 uid = current_uid(); 482 gid = current_gid(); 483 umask = current_umask(); 484 lowercase = 0; 485 conv = CONV_BINARY; 486 eas = 2; 487 chk = 1; 488 errs = 1; 489 chkdsk = 1; 490 timeshift = 0; 491 492 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv, 493 &eas, &chk, &errs, &chkdsk, ×hift))) { 494 printk("HPFS: bad mount options.\n"); 495 goto bail0; 496 } 497 if (o==2) { 498 hpfs_help(); 499 goto bail0; 500 } 501 502 /*sbi->sb_mounting = 1;*/ 503 sb_set_blocksize(s, 512); 504 sbi->sb_fs_size = -1; 505 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 506 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 507 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 508 509 /* Check magics */ 510 if (/*bootblock->magic != BB_MAGIC 511 ||*/ superblock->magic != SB_MAGIC 512 || spareblock->magic != SP_MAGIC) { 513 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 514 goto bail4; 515 } 516 517 /* Check version */ 518 if (!(s->s_flags & MS_RDONLY) && 519 superblock->funcversion != 2 && superblock->funcversion != 3) { 520 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 521 (int)superblock->version, (int)superblock->funcversion); 522 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"); 523 goto bail4; 524 } 525 526 s->s_flags |= MS_NOATIME; 527 528 /* Fill superblock stuff */ 529 s->s_magic = HPFS_SUPER_MAGIC; 530 s->s_op = &hpfs_sops; 531 532 sbi->sb_root = superblock->root; 533 sbi->sb_fs_size = superblock->n_sectors; 534 sbi->sb_bitmaps = superblock->bitmaps; 535 sbi->sb_dirband_start = superblock->dir_band_start; 536 sbi->sb_dirband_size = superblock->n_dir_band; 537 sbi->sb_dmap = superblock->dir_band_bitmap; 538 sbi->sb_uid = uid; 539 sbi->sb_gid = gid; 540 sbi->sb_mode = 0777 & ~umask; 541 sbi->sb_n_free = -1; 542 sbi->sb_n_free_dnodes = -1; 543 sbi->sb_lowercase = lowercase; 544 sbi->sb_conv = conv; 545 sbi->sb_eas = eas; 546 sbi->sb_chk = chk; 547 sbi->sb_chkdsk = chkdsk; 548 sbi->sb_err = errs; 549 sbi->sb_timeshift = timeshift; 550 sbi->sb_was_error = 0; 551 sbi->sb_cp_table = NULL; 552 sbi->sb_c_bitmap = -1; 553 sbi->sb_max_fwd_alloc = 0xffffff; 554 555 /* Load bitmap directory */ 556 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps))) 557 goto bail4; 558 559 /* Check for general fs errors*/ 560 if (spareblock->dirty && !spareblock->old_wrote) { 561 if (errs == 2) { 562 printk("HPFS: Improperly stopped, not mounted\n"); 563 goto bail4; 564 } 565 hpfs_error(s, "improperly stopped"); 566 } 567 568 if (!(s->s_flags & MS_RDONLY)) { 569 spareblock->dirty = 1; 570 spareblock->old_wrote = 0; 571 mark_buffer_dirty(bh2); 572 } 573 574 if (spareblock->hotfixes_used || spareblock->n_spares_used) { 575 if (errs >= 2) { 576 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 577 mark_dirty(s); 578 goto bail4; 579 } 580 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 581 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 582 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 583 } 584 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) { 585 if (errs >= 2) { 586 printk("HPFS: Spare dnodes used, try chkdsk\n"); 587 mark_dirty(s); 588 goto bail4; 589 } 590 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 591 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 592 } 593 if (chk) { 594 unsigned a; 595 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band || 596 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) { 597 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 598 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band); 599 goto bail4; 600 } 601 a = sbi->sb_dirband_size; 602 sbi->sb_dirband_size = 0; 603 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") || 604 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") || 605 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) { 606 mark_dirty(s); 607 goto bail4; 608 } 609 sbi->sb_dirband_size = a; 610 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 611 612 /* Load code page table */ 613 if (spareblock->n_code_pages) 614 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir))) 615 printk("HPFS: Warning: code page support is disabled\n"); 616 617 brelse(bh2); 618 brelse(bh1); 619 brelse(bh0); 620 621 root = iget_locked(s, sbi->sb_root); 622 if (!root) 623 goto bail0; 624 hpfs_init_inode(root); 625 hpfs_read_inode(root); 626 unlock_new_inode(root); 627 s->s_root = d_alloc_root(root); 628 if (!s->s_root) { 629 iput(root); 630 goto bail0; 631 } 632 hpfs_set_dentry_operations(s->s_root); 633 634 /* 635 * find the root directory's . pointer & finish filling in the inode 636 */ 637 638 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 639 if (root_dno) 640 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 641 if (!de) 642 hpfs_error(s, "unable to find root dir"); 643 else { 644 root->i_atime.tv_sec = local_to_gmt(s, de->read_date); 645 root->i_atime.tv_nsec = 0; 646 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date); 647 root->i_mtime.tv_nsec = 0; 648 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date); 649 root->i_ctime.tv_nsec = 0; 650 hpfs_i(root)->i_ea_size = de->ea_size; 651 hpfs_i(root)->i_parent_dir = root->i_ino; 652 if (root->i_size == -1) 653 root->i_size = 2048; 654 if (root->i_blocks == -1) 655 root->i_blocks = 5; 656 hpfs_brelse4(&qbh); 657 } 658 return 0; 659 660 bail4: brelse(bh2); 661 bail3: brelse(bh1); 662 bail2: brelse(bh0); 663 bail1: 664 bail0: 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 int hpfs_get_sb(struct file_system_type *fs_type, 673 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 674 { 675 return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super, 676 mnt); 677 } 678 679 static struct file_system_type hpfs_fs_type = { 680 .owner = THIS_MODULE, 681 .name = "hpfs", 682 .get_sb = hpfs_get_sb, 683 .kill_sb = kill_block_super, 684 .fs_flags = FS_REQUIRES_DEV, 685 }; 686 687 static int __init init_hpfs_fs(void) 688 { 689 int err = init_inodecache(); 690 if (err) 691 goto out1; 692 err = register_filesystem(&hpfs_fs_type); 693 if (err) 694 goto out; 695 return 0; 696 out: 697 destroy_inodecache(); 698 out1: 699 return err; 700 } 701 702 static void __exit exit_hpfs_fs(void) 703 { 704 unregister_filesystem(&hpfs_fs_type); 705 destroy_inodecache(); 706 } 707 708 module_init(init_hpfs_fs) 709 module_exit(exit_hpfs_fs) 710 MODULE_LICENSE("GPL"); 711