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