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