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 21static 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 39static 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... */ 55static char err_buf[1024]; 56 57void 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 pr_err("filesystem error: %s", err_buf); 66 if (!hpfs_sb(s)->sb_was_error) { 67 if (hpfs_sb(s)->sb_err == 2) { 68 pr_cont("; 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) 73 pr_cont("; already mounted read-only\n"); 74 else { 75 pr_cont("; remounting read-only\n"); 76 mark_dirty(s, 0); 77 s->s_flags |= MS_RDONLY; 78 } 79 } else if (s->s_flags & MS_RDONLY) 80 pr_cont("; going on - but anything won't be destroyed because it's read-only\n"); 81 else 82 pr_cont("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); 83 } else 84 pr_cont("\n"); 85 hpfs_sb(s)->sb_was_error = 1; 86} 87 88/* 89 * A little trick to detect cycles in many hpfs structures and don't let the 90 * kernel crash on corrupted filesystem. When first called, set c2 to 0. 91 * 92 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories 93 * nested each in other, chkdsk locked up happilly. 94 */ 95 96int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, 97 char *msg) 98{ 99 if (*c2 && *c1 == key) { 100 hpfs_error(s, "cycle detected on key %08x in %s", key, msg); 101 return 1; 102 } 103 (*c2)++; 104 if (!((*c2 - 1) & *c2)) *c1 = key; 105 return 0; 106} 107 108static void free_sbi(struct hpfs_sb_info *sbi) 109{ 110 kfree(sbi->sb_cp_table); 111 kfree(sbi->sb_bmp_dir); 112 kfree(sbi); 113} 114 115static void lazy_free_sbi(struct rcu_head *rcu) 116{ 117 free_sbi(container_of(rcu, struct hpfs_sb_info, rcu)); 118} 119 120static void hpfs_put_super(struct super_block *s) 121{ 122 hpfs_lock(s); 123 unmark_dirty(s); 124 hpfs_unlock(s); 125 call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi); 126} 127 128static unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) 129{ 130 struct quad_buffer_head qbh; 131 unsigned long *bits; 132 unsigned count; 133 134 bits = hpfs_map_4sectors(s, secno, &qbh, 0); 135 if (!bits) 136 return (unsigned)-1; 137 count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); 138 hpfs_brelse4(&qbh); 139 return count; 140} 141 142static unsigned count_bitmaps(struct super_block *s) 143{ 144 unsigned n, count, n_bands; 145 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; 146 count = 0; 147 for (n = 0; n < COUNT_RD_AHEAD; n++) { 148 hpfs_prefetch_bitmap(s, n); 149 } 150 for (n = 0; n < n_bands; n++) { 151 unsigned c; 152 hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD); 153 c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n])); 154 if (c != (unsigned)-1) 155 count += c; 156 } 157 return count; 158} 159 160unsigned hpfs_get_free_dnodes(struct super_block *s) 161{ 162 struct hpfs_sb_info *sbi = hpfs_sb(s); 163 if (sbi->sb_n_free_dnodes == (unsigned)-1) { 164 unsigned c = hpfs_count_one_bitmap(s, sbi->sb_dmap); 165 if (c == (unsigned)-1) 166 return 0; 167 sbi->sb_n_free_dnodes = c; 168 } 169 return sbi->sb_n_free_dnodes; 170} 171 172static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) 173{ 174 struct super_block *s = dentry->d_sb; 175 struct hpfs_sb_info *sbi = hpfs_sb(s); 176 u64 id = huge_encode_dev(s->s_bdev->bd_dev); 177 178 hpfs_lock(s); 179 180 if (sbi->sb_n_free == (unsigned)-1) 181 sbi->sb_n_free = count_bitmaps(s); 182 183 buf->f_type = s->s_magic; 184 buf->f_bsize = 512; 185 buf->f_blocks = sbi->sb_fs_size; 186 buf->f_bfree = sbi->sb_n_free; 187 buf->f_bavail = sbi->sb_n_free; 188 buf->f_files = sbi->sb_dirband_size / 4; 189 buf->f_ffree = hpfs_get_free_dnodes(s); 190 buf->f_fsid.val[0] = (u32)id; 191 buf->f_fsid.val[1] = (u32)(id >> 32); 192 buf->f_namelen = 254; 193 194 hpfs_unlock(s); 195 196 return 0; 197} 198 199static struct kmem_cache * hpfs_inode_cachep; 200 201static struct inode *hpfs_alloc_inode(struct super_block *sb) 202{ 203 struct hpfs_inode_info *ei; 204 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); 205 if (!ei) 206 return NULL; 207 ei->vfs_inode.i_version = 1; 208 return &ei->vfs_inode; 209} 210 211static void hpfs_i_callback(struct rcu_head *head) 212{ 213 struct inode *inode = container_of(head, struct inode, i_rcu); 214 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 215} 216 217static void hpfs_destroy_inode(struct inode *inode) 218{ 219 call_rcu(&inode->i_rcu, hpfs_i_callback); 220} 221 222static void init_once(void *foo) 223{ 224 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 225 226 inode_init_once(&ei->vfs_inode); 227} 228 229static int init_inodecache(void) 230{ 231 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 232 sizeof(struct hpfs_inode_info), 233 0, (SLAB_RECLAIM_ACCOUNT| 234 SLAB_MEM_SPREAD), 235 init_once); 236 if (hpfs_inode_cachep == NULL) 237 return -ENOMEM; 238 return 0; 239} 240 241static void destroy_inodecache(void) 242{ 243 /* 244 * Make sure all delayed rcu free inodes are flushed before we 245 * destroy cache. 246 */ 247 rcu_barrier(); 248 kmem_cache_destroy(hpfs_inode_cachep); 249} 250 251/* 252 * A tiny parser for option strings, stolen from dosfs. 253 * Stolen again from read-only hpfs. 254 * And updated for table-driven option parsing. 255 */ 256 257enum { 258 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 259 Opt_check_none, Opt_check_normal, Opt_check_strict, 260 Opt_err_cont, Opt_err_ro, Opt_err_panic, 261 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 262 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 263 Opt_timeshift, Opt_err, 264}; 265 266static const match_table_t tokens = { 267 {Opt_help, "help"}, 268 {Opt_uid, "uid=%u"}, 269 {Opt_gid, "gid=%u"}, 270 {Opt_umask, "umask=%o"}, 271 {Opt_case_lower, "case=lower"}, 272 {Opt_case_asis, "case=asis"}, 273 {Opt_check_none, "check=none"}, 274 {Opt_check_normal, "check=normal"}, 275 {Opt_check_strict, "check=strict"}, 276 {Opt_err_cont, "errors=continue"}, 277 {Opt_err_ro, "errors=remount-ro"}, 278 {Opt_err_panic, "errors=panic"}, 279 {Opt_eas_no, "eas=no"}, 280 {Opt_eas_ro, "eas=ro"}, 281 {Opt_eas_rw, "eas=rw"}, 282 {Opt_chkdsk_no, "chkdsk=no"}, 283 {Opt_chkdsk_errors, "chkdsk=errors"}, 284 {Opt_chkdsk_always, "chkdsk=always"}, 285 {Opt_timeshift, "timeshift=%d"}, 286 {Opt_err, NULL}, 287}; 288 289static int parse_opts(char *opts, kuid_t *uid, kgid_t *gid, umode_t *umask, 290 int *lowercase, int *eas, int *chk, int *errs, 291 int *chkdsk, int *timeshift) 292{ 293 char *p; 294 int option; 295 296 if (!opts) 297 return 1; 298 299 /*pr_info("Parsing opts: '%s'\n",opts);*/ 300 301 while ((p = strsep(&opts, ",")) != NULL) { 302 substring_t args[MAX_OPT_ARGS]; 303 int token; 304 if (!*p) 305 continue; 306 307 token = match_token(p, tokens, args); 308 switch (token) { 309 case Opt_help: 310 return 2; 311 case Opt_uid: 312 if (match_int(args, &option)) 313 return 0; 314 *uid = make_kuid(current_user_ns(), option); 315 if (!uid_valid(*uid)) 316 return 0; 317 break; 318 case Opt_gid: 319 if (match_int(args, &option)) 320 return 0; 321 *gid = make_kgid(current_user_ns(), option); 322 if (!gid_valid(*gid)) 323 return 0; 324 break; 325 case Opt_umask: 326 if (match_octal(args, &option)) 327 return 0; 328 *umask = option; 329 break; 330 case Opt_case_lower: 331 *lowercase = 1; 332 break; 333 case Opt_case_asis: 334 *lowercase = 0; 335 break; 336 case Opt_check_none: 337 *chk = 0; 338 break; 339 case Opt_check_normal: 340 *chk = 1; 341 break; 342 case Opt_check_strict: 343 *chk = 2; 344 break; 345 case Opt_err_cont: 346 *errs = 0; 347 break; 348 case Opt_err_ro: 349 *errs = 1; 350 break; 351 case Opt_err_panic: 352 *errs = 2; 353 break; 354 case Opt_eas_no: 355 *eas = 0; 356 break; 357 case Opt_eas_ro: 358 *eas = 1; 359 break; 360 case Opt_eas_rw: 361 *eas = 2; 362 break; 363 case Opt_chkdsk_no: 364 *chkdsk = 0; 365 break; 366 case Opt_chkdsk_errors: 367 *chkdsk = 1; 368 break; 369 case Opt_chkdsk_always: 370 *chkdsk = 2; 371 break; 372 case Opt_timeshift: 373 { 374 int m = 1; 375 char *rhs = args[0].from; 376 if (!rhs || !*rhs) 377 return 0; 378 if (*rhs == '-') m = -1; 379 if (*rhs == '+' || *rhs == '-') rhs++; 380 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 381 if (*rhs) 382 return 0; 383 break; 384 } 385 default: 386 return 0; 387 } 388 } 389 return 1; 390} 391 392static inline void hpfs_help(void) 393{ 394 pr_info("\n\ 395HPFS filesystem options:\n\ 396 help do not mount and display this text\n\ 397 uid=xxx set uid of files that don't have uid specified in eas\n\ 398 gid=xxx set gid of files that don't have gid specified in eas\n\ 399 umask=xxx set mode of files that don't have mode specified in eas\n\ 400 case=lower lowercase all files\n\ 401 case=asis do not lowercase files (default)\n\ 402 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 403 check=normal do some checks - it should not crash (default)\n\ 404 check=strict do extra time-consuming checks, used for debugging\n\ 405 errors=continue continue on errors\n\ 406 errors=remount-ro remount read-only if errors found (default)\n\ 407 errors=panic panic on errors\n\ 408 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 409 chkdsk=errors mark fs dirty if errors found (default)\n\ 410 chkdsk=always always mark fs dirty - used for debugging\n\ 411 eas=no ignore extended attributes\n\ 412 eas=ro read but do not write extended attributes\n\ 413 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 414 timeshift=nnn add nnn seconds to file times\n\ 415\n"); 416} 417 418static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 419{ 420 kuid_t uid; 421 kgid_t gid; 422 umode_t umask; 423 int lowercase, eas, chk, errs, chkdsk, timeshift; 424 int o; 425 struct hpfs_sb_info *sbi = hpfs_sb(s); 426 char *new_opts = kstrdup(data, GFP_KERNEL); 427 428 sync_filesystem(s); 429 430 *flags |= MS_NOATIME; 431 432 hpfs_lock(s); 433 uid = sbi->sb_uid; gid = sbi->sb_gid; 434 umask = 0777 & ~sbi->sb_mode; 435 lowercase = sbi->sb_lowercase; 436 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 437 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 438 439 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, 440 &eas, &chk, &errs, &chkdsk, ×hift))) { 441 pr_err("bad mount options.\n"); 442 goto out_err; 443 } 444 if (o == 2) { 445 hpfs_help(); 446 goto out_err; 447 } 448 if (timeshift != sbi->sb_timeshift) { 449 pr_err("timeshift can't be changed using remount.\n"); 450 goto out_err; 451 } 452 453 unmark_dirty(s); 454 455 sbi->sb_uid = uid; sbi->sb_gid = gid; 456 sbi->sb_mode = 0777 & ~umask; 457 sbi->sb_lowercase = lowercase; 458 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 459 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 460 461 if (!(*flags & MS_RDONLY)) mark_dirty(s, 1); 462 463 replace_mount_options(s, new_opts); 464 465 hpfs_unlock(s); 466 return 0; 467 468out_err: 469 hpfs_unlock(s); 470 kfree(new_opts); 471 return -EINVAL; 472} 473 474/* Super operations */ 475 476static const struct super_operations hpfs_sops = 477{ 478 .alloc_inode = hpfs_alloc_inode, 479 .destroy_inode = hpfs_destroy_inode, 480 .evict_inode = hpfs_evict_inode, 481 .put_super = hpfs_put_super, 482 .statfs = hpfs_statfs, 483 .remount_fs = hpfs_remount_fs, 484 .show_options = generic_show_options, 485}; 486 487static int hpfs_fill_super(struct super_block *s, void *options, int silent) 488{ 489 struct buffer_head *bh0, *bh1, *bh2; 490 struct hpfs_boot_block *bootblock; 491 struct hpfs_super_block *superblock; 492 struct hpfs_spare_block *spareblock; 493 struct hpfs_sb_info *sbi; 494 struct inode *root; 495 496 kuid_t uid; 497 kgid_t gid; 498 umode_t umask; 499 int lowercase, eas, chk, errs, chkdsk, timeshift; 500 501 dnode_secno root_dno; 502 struct hpfs_dirent *de = NULL; 503 struct quad_buffer_head qbh; 504 505 int o; 506 507 save_mount_options(s, options); 508 509 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 510 if (!sbi) { 511 return -ENOMEM; 512 } 513 s->s_fs_info = sbi; 514 515 mutex_init(&sbi->hpfs_mutex); 516 hpfs_lock(s); 517 518 uid = current_uid(); 519 gid = current_gid(); 520 umask = current_umask(); 521 lowercase = 0; 522 eas = 2; 523 chk = 1; 524 errs = 1; 525 chkdsk = 1; 526 timeshift = 0; 527 528 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, 529 &eas, &chk, &errs, &chkdsk, ×hift))) { 530 pr_err("bad mount options.\n"); 531 goto bail0; 532 } 533 if (o==2) { 534 hpfs_help(); 535 goto bail0; 536 } 537 538 /*sbi->sb_mounting = 1;*/ 539 sb_set_blocksize(s, 512); 540 sbi->sb_fs_size = -1; 541 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 542 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 543 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 544 545 /* Check magics */ 546 if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC 547 ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC 548 || le32_to_cpu(spareblock->magic) != SP_MAGIC) { 549 if (!silent) 550 pr_err("Bad magic ... probably not HPFS\n"); 551 goto bail4; 552 } 553 554 /* Check version */ 555 if (!(s->s_flags & MS_RDONLY) && 556 superblock->funcversion != 2 && superblock->funcversion != 3) { 557 pr_err("Bad version %d,%d. Mount readonly to go around\n", 558 (int)superblock->version, (int)superblock->funcversion); 559 pr_err("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"); 560 goto bail4; 561 } 562 563 s->s_flags |= MS_NOATIME; 564 565 /* Fill superblock stuff */ 566 s->s_magic = HPFS_SUPER_MAGIC; 567 s->s_op = &hpfs_sops; 568 s->s_d_op = &hpfs_dentry_operations; 569 570 sbi->sb_root = le32_to_cpu(superblock->root); 571 sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors); 572 sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps); 573 sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start); 574 sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band); 575 sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap); 576 sbi->sb_uid = uid; 577 sbi->sb_gid = gid; 578 sbi->sb_mode = 0777 & ~umask; 579 sbi->sb_n_free = -1; 580 sbi->sb_n_free_dnodes = -1; 581 sbi->sb_lowercase = lowercase; 582 sbi->sb_eas = eas; 583 sbi->sb_chk = chk; 584 sbi->sb_chkdsk = chkdsk; 585 sbi->sb_err = errs; 586 sbi->sb_timeshift = timeshift; 587 sbi->sb_was_error = 0; 588 sbi->sb_cp_table = NULL; 589 sbi->sb_c_bitmap = -1; 590 sbi->sb_max_fwd_alloc = 0xffffff; 591 592 if (sbi->sb_fs_size >= 0x80000000) { 593 hpfs_error(s, "invalid size in superblock: %08x", 594 (unsigned)sbi->sb_fs_size); 595 goto bail4; 596 } 597 598 /* Load bitmap directory */ 599 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps)))) 600 goto bail4; 601 602 /* Check for general fs errors*/ 603 if (spareblock->dirty && !spareblock->old_wrote) { 604 if (errs == 2) { 605 pr_err("Improperly stopped, not mounted\n"); 606 goto bail4; 607 } 608 hpfs_error(s, "improperly stopped"); 609 } 610 611 if (!(s->s_flags & MS_RDONLY)) { 612 spareblock->dirty = 1; 613 spareblock->old_wrote = 0; 614 mark_buffer_dirty(bh2); 615 } 616 617 if (spareblock->hotfixes_used || spareblock->n_spares_used) { 618 if (errs >= 2) { 619 pr_err("Hotfixes not supported here, try chkdsk\n"); 620 mark_dirty(s, 0); 621 goto bail4; 622 } 623 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 624 if (errs == 0) 625 pr_err("Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 626 else 627 pr_err("This driver may read bad files or crash when operating on disk with hotfixes.\n"); 628 } 629 if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) { 630 if (errs >= 2) { 631 pr_err("Spare dnodes used, try chkdsk\n"); 632 mark_dirty(s, 0); 633 goto bail4; 634 } 635 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 636 if (errs == 0) 637 pr_err("Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 638 } 639 if (chk) { 640 unsigned a; 641 if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) || 642 le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) { 643 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 644 le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band)); 645 goto bail4; 646 } 647 a = sbi->sb_dirband_size; 648 sbi->sb_dirband_size = 0; 649 if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") || 650 hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") || 651 hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) { 652 mark_dirty(s, 0); 653 goto bail4; 654 } 655 sbi->sb_dirband_size = a; 656 } else 657 pr_err("You really don't want any checks? You are crazy...\n"); 658 659 /* Load code page table */ 660 if (le32_to_cpu(spareblock->n_code_pages)) 661 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir)))) 662 pr_err("code page support is disabled\n"); 663 664 brelse(bh2); 665 brelse(bh1); 666 brelse(bh0); 667 668 root = iget_locked(s, sbi->sb_root); 669 if (!root) 670 goto bail0; 671 hpfs_init_inode(root); 672 hpfs_read_inode(root); 673 unlock_new_inode(root); 674 s->s_root = d_make_root(root); 675 if (!s->s_root) 676 goto bail0; 677 678 /* 679 * find the root directory's . pointer & finish filling in the inode 680 */ 681 682 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 683 if (root_dno) 684 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 685 if (!de) 686 hpfs_error(s, "unable to find root dir"); 687 else { 688 root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date)); 689 root->i_atime.tv_nsec = 0; 690 root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date)); 691 root->i_mtime.tv_nsec = 0; 692 root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date)); 693 root->i_ctime.tv_nsec = 0; 694 hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size); 695 hpfs_i(root)->i_parent_dir = root->i_ino; 696 if (root->i_size == -1) 697 root->i_size = 2048; 698 if (root->i_blocks == -1) 699 root->i_blocks = 5; 700 hpfs_brelse4(&qbh); 701 } 702 hpfs_unlock(s); 703 return 0; 704 705bail4: brelse(bh2); 706bail3: brelse(bh1); 707bail2: brelse(bh0); 708bail1: 709bail0: 710 hpfs_unlock(s); 711 free_sbi(sbi); 712 return -EINVAL; 713} 714 715static struct dentry *hpfs_mount(struct file_system_type *fs_type, 716 int flags, const char *dev_name, void *data) 717{ 718 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); 719} 720 721static struct file_system_type hpfs_fs_type = { 722 .owner = THIS_MODULE, 723 .name = "hpfs", 724 .mount = hpfs_mount, 725 .kill_sb = kill_block_super, 726 .fs_flags = FS_REQUIRES_DEV, 727}; 728MODULE_ALIAS_FS("hpfs"); 729 730static int __init init_hpfs_fs(void) 731{ 732 int err = init_inodecache(); 733 if (err) 734 goto out1; 735 err = register_filesystem(&hpfs_fs_type); 736 if (err) 737 goto out; 738 return 0; 739out: 740 destroy_inodecache(); 741out1: 742 return err; 743} 744 745static void __exit exit_hpfs_fs(void) 746{ 747 unregister_filesystem(&hpfs_fs_type); 748 destroy_inodecache(); 749} 750 751module_init(init_hpfs_fs) 752module_exit(exit_hpfs_fs) 753MODULE_LICENSE("GPL"); 754