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/smp_lock.h> 17 #include <linux/bitmap.h> 18 #include <linux/slab.h> 19 20 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ 21 22 static void mark_dirty(struct super_block *s) 23 { 24 if (hpfs_sb(s)->sb_chkdsk && !(s->s_flags & MS_RDONLY)) { 25 struct buffer_head *bh; 26 struct hpfs_spare_block *sb; 27 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 28 sb->dirty = 1; 29 sb->old_wrote = 0; 30 mark_buffer_dirty(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 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 45 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; 46 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; 47 mark_buffer_dirty(bh); 48 brelse(bh); 49 } 50 } 51 52 /* Filesystem error... */ 53 static char err_buf[1024]; 54 55 void hpfs_error(struct super_block *s, const char *fmt, ...) 56 { 57 va_list args; 58 59 va_start(args, fmt); 60 vsnprintf(err_buf, sizeof(err_buf), fmt, args); 61 va_end(args); 62 63 printk("HPFS: filesystem error: %s", err_buf); 64 if (!hpfs_sb(s)->sb_was_error) { 65 if (hpfs_sb(s)->sb_err == 2) { 66 printk("; crashing the system because you wanted it\n"); 67 mark_dirty(s); 68 panic("HPFS panic"); 69 } else if (hpfs_sb(s)->sb_err == 1) { 70 if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n"); 71 else { 72 printk("; remounting read-only\n"); 73 mark_dirty(s); 74 s->s_flags |= MS_RDONLY; 75 } 76 } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n"); 77 else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); 78 } else printk("\n"); 79 hpfs_sb(s)->sb_was_error = 1; 80 } 81 82 /* 83 * A little trick to detect cycles in many hpfs structures and don't let the 84 * kernel crash on corrupted filesystem. When first called, set c2 to 0. 85 * 86 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories 87 * nested each in other, chkdsk locked up happilly. 88 */ 89 90 int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, 91 char *msg) 92 { 93 if (*c2 && *c1 == key) { 94 hpfs_error(s, "cycle detected on key %08x in %s", key, msg); 95 return 1; 96 } 97 (*c2)++; 98 if (!((*c2 - 1) & *c2)) *c1 = key; 99 return 0; 100 } 101 102 static void hpfs_put_super(struct super_block *s) 103 { 104 struct hpfs_sb_info *sbi = hpfs_sb(s); 105 106 lock_kernel(); 107 108 kfree(sbi->sb_cp_table); 109 kfree(sbi->sb_bmp_dir); 110 unmark_dirty(s); 111 s->s_fs_info = NULL; 112 kfree(sbi); 113 114 unlock_kernel(); 115 } 116 117 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) 118 { 119 struct quad_buffer_head qbh; 120 unsigned long *bits; 121 unsigned count; 122 123 bits = hpfs_map_4sectors(s, secno, &qbh, 4); 124 if (!bits) 125 return 0; 126 count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); 127 hpfs_brelse4(&qbh); 128 return count; 129 } 130 131 static unsigned count_bitmaps(struct super_block *s) 132 { 133 unsigned n, count, n_bands; 134 n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; 135 count = 0; 136 for (n = 0; n < n_bands; n++) 137 count += hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_bmp_dir[n]); 138 return count; 139 } 140 141 static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) 142 { 143 struct super_block *s = dentry->d_sb; 144 struct hpfs_sb_info *sbi = hpfs_sb(s); 145 u64 id = huge_encode_dev(s->s_bdev->bd_dev); 146 lock_kernel(); 147 148 /*if (sbi->sb_n_free == -1) {*/ 149 sbi->sb_n_free = count_bitmaps(s); 150 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap); 151 /*}*/ 152 buf->f_type = s->s_magic; 153 buf->f_bsize = 512; 154 buf->f_blocks = sbi->sb_fs_size; 155 buf->f_bfree = sbi->sb_n_free; 156 buf->f_bavail = sbi->sb_n_free; 157 buf->f_files = sbi->sb_dirband_size / 4; 158 buf->f_ffree = sbi->sb_n_free_dnodes; 159 buf->f_fsid.val[0] = (u32)id; 160 buf->f_fsid.val[1] = (u32)(id >> 32); 161 buf->f_namelen = 254; 162 163 unlock_kernel(); 164 165 return 0; 166 } 167 168 static struct kmem_cache * hpfs_inode_cachep; 169 170 static struct inode *hpfs_alloc_inode(struct super_block *sb) 171 { 172 struct hpfs_inode_info *ei; 173 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); 174 if (!ei) 175 return NULL; 176 ei->vfs_inode.i_version = 1; 177 return &ei->vfs_inode; 178 } 179 180 static void hpfs_i_callback(struct rcu_head *head) 181 { 182 struct inode *inode = container_of(head, struct inode, i_rcu); 183 INIT_LIST_HEAD(&inode->i_dentry); 184 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 185 } 186 187 static void hpfs_destroy_inode(struct inode *inode) 188 { 189 call_rcu(&inode->i_rcu, hpfs_i_callback); 190 } 191 192 static void init_once(void *foo) 193 { 194 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 195 196 mutex_init(&ei->i_mutex); 197 mutex_init(&ei->i_parent_mutex); 198 inode_init_once(&ei->vfs_inode); 199 } 200 201 static int init_inodecache(void) 202 { 203 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 204 sizeof(struct hpfs_inode_info), 205 0, (SLAB_RECLAIM_ACCOUNT| 206 SLAB_MEM_SPREAD), 207 init_once); 208 if (hpfs_inode_cachep == NULL) 209 return -ENOMEM; 210 return 0; 211 } 212 213 static void destroy_inodecache(void) 214 { 215 kmem_cache_destroy(hpfs_inode_cachep); 216 } 217 218 /* 219 * A tiny parser for option strings, stolen from dosfs. 220 * Stolen again from read-only hpfs. 221 * And updated for table-driven option parsing. 222 */ 223 224 enum { 225 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 226 Opt_conv_binary, Opt_conv_text, Opt_conv_auto, 227 Opt_check_none, Opt_check_normal, Opt_check_strict, 228 Opt_err_cont, Opt_err_ro, Opt_err_panic, 229 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 230 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 231 Opt_timeshift, Opt_err, 232 }; 233 234 static const match_table_t tokens = { 235 {Opt_help, "help"}, 236 {Opt_uid, "uid=%u"}, 237 {Opt_gid, "gid=%u"}, 238 {Opt_umask, "umask=%o"}, 239 {Opt_case_lower, "case=lower"}, 240 {Opt_case_asis, "case=asis"}, 241 {Opt_conv_binary, "conv=binary"}, 242 {Opt_conv_text, "conv=text"}, 243 {Opt_conv_auto, "conv=auto"}, 244 {Opt_check_none, "check=none"}, 245 {Opt_check_normal, "check=normal"}, 246 {Opt_check_strict, "check=strict"}, 247 {Opt_err_cont, "errors=continue"}, 248 {Opt_err_ro, "errors=remount-ro"}, 249 {Opt_err_panic, "errors=panic"}, 250 {Opt_eas_no, "eas=no"}, 251 {Opt_eas_ro, "eas=ro"}, 252 {Opt_eas_rw, "eas=rw"}, 253 {Opt_chkdsk_no, "chkdsk=no"}, 254 {Opt_chkdsk_errors, "chkdsk=errors"}, 255 {Opt_chkdsk_always, "chkdsk=always"}, 256 {Opt_timeshift, "timeshift=%d"}, 257 {Opt_err, NULL}, 258 }; 259 260 static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, 261 int *lowercase, int *conv, int *eas, int *chk, int *errs, 262 int *chkdsk, int *timeshift) 263 { 264 char *p; 265 int option; 266 267 if (!opts) 268 return 1; 269 270 /*printk("Parsing opts: '%s'\n",opts);*/ 271 272 while ((p = strsep(&opts, ",")) != NULL) { 273 substring_t args[MAX_OPT_ARGS]; 274 int token; 275 if (!*p) 276 continue; 277 278 token = match_token(p, tokens, args); 279 switch (token) { 280 case Opt_help: 281 return 2; 282 case Opt_uid: 283 if (match_int(args, &option)) 284 return 0; 285 *uid = option; 286 break; 287 case Opt_gid: 288 if (match_int(args, &option)) 289 return 0; 290 *gid = option; 291 break; 292 case Opt_umask: 293 if (match_octal(args, &option)) 294 return 0; 295 *umask = option; 296 break; 297 case Opt_case_lower: 298 *lowercase = 1; 299 break; 300 case Opt_case_asis: 301 *lowercase = 0; 302 break; 303 case Opt_conv_binary: 304 *conv = CONV_BINARY; 305 break; 306 case Opt_conv_text: 307 *conv = CONV_TEXT; 308 break; 309 case Opt_conv_auto: 310 *conv = CONV_AUTO; 311 break; 312 case Opt_check_none: 313 *chk = 0; 314 break; 315 case Opt_check_normal: 316 *chk = 1; 317 break; 318 case Opt_check_strict: 319 *chk = 2; 320 break; 321 case Opt_err_cont: 322 *errs = 0; 323 break; 324 case Opt_err_ro: 325 *errs = 1; 326 break; 327 case Opt_err_panic: 328 *errs = 2; 329 break; 330 case Opt_eas_no: 331 *eas = 0; 332 break; 333 case Opt_eas_ro: 334 *eas = 1; 335 break; 336 case Opt_eas_rw: 337 *eas = 2; 338 break; 339 case Opt_chkdsk_no: 340 *chkdsk = 0; 341 break; 342 case Opt_chkdsk_errors: 343 *chkdsk = 1; 344 break; 345 case Opt_chkdsk_always: 346 *chkdsk = 2; 347 break; 348 case Opt_timeshift: 349 { 350 int m = 1; 351 char *rhs = args[0].from; 352 if (!rhs || !*rhs) 353 return 0; 354 if (*rhs == '-') m = -1; 355 if (*rhs == '+' || *rhs == '-') rhs++; 356 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 357 if (*rhs) 358 return 0; 359 break; 360 } 361 default: 362 return 0; 363 } 364 } 365 return 1; 366 } 367 368 static inline void hpfs_help(void) 369 { 370 printk("\n\ 371 HPFS filesystem options:\n\ 372 help do not mount and display this text\n\ 373 uid=xxx set uid of files that don't have uid specified in eas\n\ 374 gid=xxx set gid of files that don't have gid specified in eas\n\ 375 umask=xxx set mode of files that don't have mode specified in eas\n\ 376 case=lower lowercase all files\n\ 377 case=asis do not lowercase files (default)\n\ 378 conv=binary do not convert CR/LF -> LF (default)\n\ 379 conv=auto convert only files with known text extensions\n\ 380 conv=text convert all files\n\ 381 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 382 check=normal do some checks - it should not crash (default)\n\ 383 check=strict do extra time-consuming checks, used for debugging\n\ 384 errors=continue continue on errors\n\ 385 errors=remount-ro remount read-only if errors found (default)\n\ 386 errors=panic panic on errors\n\ 387 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 388 chkdsk=errors mark fs dirty if errors found (default)\n\ 389 chkdsk=always always mark fs dirty - used for debugging\n\ 390 eas=no ignore extended attributes\n\ 391 eas=ro read but do not write extended attributes\n\ 392 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 393 timeshift=nnn add nnn seconds to file times\n\ 394 \n"); 395 } 396 397 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 398 { 399 uid_t uid; 400 gid_t gid; 401 umode_t umask; 402 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 403 int o; 404 struct hpfs_sb_info *sbi = hpfs_sb(s); 405 char *new_opts = kstrdup(data, GFP_KERNEL); 406 407 *flags |= MS_NOATIME; 408 409 lock_kernel(); 410 lock_super(s); 411 uid = sbi->sb_uid; gid = sbi->sb_gid; 412 umask = 0777 & ~sbi->sb_mode; 413 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv; 414 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 415 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 416 417 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv, 418 &eas, &chk, &errs, &chkdsk, ×hift))) { 419 printk("HPFS: bad mount options.\n"); 420 goto out_err; 421 } 422 if (o == 2) { 423 hpfs_help(); 424 goto out_err; 425 } 426 if (timeshift != sbi->sb_timeshift) { 427 printk("HPFS: timeshift can't be changed using remount.\n"); 428 goto out_err; 429 } 430 431 unmark_dirty(s); 432 433 sbi->sb_uid = uid; sbi->sb_gid = gid; 434 sbi->sb_mode = 0777 & ~umask; 435 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv; 436 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 437 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 438 439 if (!(*flags & MS_RDONLY)) mark_dirty(s); 440 441 replace_mount_options(s, new_opts); 442 443 unlock_super(s); 444 unlock_kernel(); 445 return 0; 446 447 out_err: 448 unlock_super(s); 449 unlock_kernel(); 450 kfree(new_opts); 451 return -EINVAL; 452 } 453 454 /* Super operations */ 455 456 static const struct super_operations hpfs_sops = 457 { 458 .alloc_inode = hpfs_alloc_inode, 459 .destroy_inode = hpfs_destroy_inode, 460 .evict_inode = hpfs_evict_inode, 461 .put_super = hpfs_put_super, 462 .statfs = hpfs_statfs, 463 .remount_fs = hpfs_remount_fs, 464 .show_options = generic_show_options, 465 }; 466 467 static int hpfs_fill_super(struct super_block *s, void *options, int silent) 468 { 469 struct buffer_head *bh0, *bh1, *bh2; 470 struct hpfs_boot_block *bootblock; 471 struct hpfs_super_block *superblock; 472 struct hpfs_spare_block *spareblock; 473 struct hpfs_sb_info *sbi; 474 struct inode *root; 475 476 uid_t uid; 477 gid_t gid; 478 umode_t umask; 479 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 480 481 dnode_secno root_dno; 482 struct hpfs_dirent *de = NULL; 483 struct quad_buffer_head qbh; 484 485 int o; 486 487 lock_kernel(); 488 489 save_mount_options(s, options); 490 491 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 492 if (!sbi) { 493 unlock_kernel(); 494 return -ENOMEM; 495 } 496 s->s_fs_info = sbi; 497 498 sbi->sb_bmp_dir = NULL; 499 sbi->sb_cp_table = NULL; 500 501 mutex_init(&sbi->hpfs_creation_de); 502 503 uid = current_uid(); 504 gid = current_gid(); 505 umask = current_umask(); 506 lowercase = 0; 507 conv = CONV_BINARY; 508 eas = 2; 509 chk = 1; 510 errs = 1; 511 chkdsk = 1; 512 timeshift = 0; 513 514 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv, 515 &eas, &chk, &errs, &chkdsk, ×hift))) { 516 printk("HPFS: bad mount options.\n"); 517 goto bail0; 518 } 519 if (o==2) { 520 hpfs_help(); 521 goto bail0; 522 } 523 524 /*sbi->sb_mounting = 1;*/ 525 sb_set_blocksize(s, 512); 526 sbi->sb_fs_size = -1; 527 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 528 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 529 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 530 531 /* Check magics */ 532 if (/*bootblock->magic != BB_MAGIC 533 ||*/ superblock->magic != SB_MAGIC 534 || spareblock->magic != SP_MAGIC) { 535 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 536 goto bail4; 537 } 538 539 /* Check version */ 540 if (!(s->s_flags & MS_RDONLY) && 541 superblock->funcversion != 2 && superblock->funcversion != 3) { 542 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 543 (int)superblock->version, (int)superblock->funcversion); 544 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"); 545 goto bail4; 546 } 547 548 s->s_flags |= MS_NOATIME; 549 550 /* Fill superblock stuff */ 551 s->s_magic = HPFS_SUPER_MAGIC; 552 s->s_op = &hpfs_sops; 553 554 sbi->sb_root = superblock->root; 555 sbi->sb_fs_size = superblock->n_sectors; 556 sbi->sb_bitmaps = superblock->bitmaps; 557 sbi->sb_dirband_start = superblock->dir_band_start; 558 sbi->sb_dirband_size = superblock->n_dir_band; 559 sbi->sb_dmap = superblock->dir_band_bitmap; 560 sbi->sb_uid = uid; 561 sbi->sb_gid = gid; 562 sbi->sb_mode = 0777 & ~umask; 563 sbi->sb_n_free = -1; 564 sbi->sb_n_free_dnodes = -1; 565 sbi->sb_lowercase = lowercase; 566 sbi->sb_conv = conv; 567 sbi->sb_eas = eas; 568 sbi->sb_chk = chk; 569 sbi->sb_chkdsk = chkdsk; 570 sbi->sb_err = errs; 571 sbi->sb_timeshift = timeshift; 572 sbi->sb_was_error = 0; 573 sbi->sb_cp_table = NULL; 574 sbi->sb_c_bitmap = -1; 575 sbi->sb_max_fwd_alloc = 0xffffff; 576 577 /* Load bitmap directory */ 578 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps))) 579 goto bail4; 580 581 /* Check for general fs errors*/ 582 if (spareblock->dirty && !spareblock->old_wrote) { 583 if (errs == 2) { 584 printk("HPFS: Improperly stopped, not mounted\n"); 585 goto bail4; 586 } 587 hpfs_error(s, "improperly stopped"); 588 } 589 590 if (!(s->s_flags & MS_RDONLY)) { 591 spareblock->dirty = 1; 592 spareblock->old_wrote = 0; 593 mark_buffer_dirty(bh2); 594 } 595 596 if (spareblock->hotfixes_used || spareblock->n_spares_used) { 597 if (errs >= 2) { 598 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 599 mark_dirty(s); 600 goto bail4; 601 } 602 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 603 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 604 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 605 } 606 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) { 607 if (errs >= 2) { 608 printk("HPFS: Spare dnodes used, try chkdsk\n"); 609 mark_dirty(s); 610 goto bail4; 611 } 612 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 613 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 614 } 615 if (chk) { 616 unsigned a; 617 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band || 618 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) { 619 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 620 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band); 621 goto bail4; 622 } 623 a = sbi->sb_dirband_size; 624 sbi->sb_dirband_size = 0; 625 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") || 626 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") || 627 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) { 628 mark_dirty(s); 629 goto bail4; 630 } 631 sbi->sb_dirband_size = a; 632 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 633 634 /* Load code page table */ 635 if (spareblock->n_code_pages) 636 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir))) 637 printk("HPFS: Warning: code page support is disabled\n"); 638 639 brelse(bh2); 640 brelse(bh1); 641 brelse(bh0); 642 643 root = iget_locked(s, sbi->sb_root); 644 if (!root) 645 goto bail0; 646 hpfs_init_inode(root); 647 hpfs_read_inode(root); 648 unlock_new_inode(root); 649 s->s_root = d_alloc_root(root); 650 if (!s->s_root) { 651 iput(root); 652 goto bail0; 653 } 654 hpfs_set_dentry_operations(s->s_root); 655 656 /* 657 * find the root directory's . pointer & finish filling in the inode 658 */ 659 660 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 661 if (root_dno) 662 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 663 if (!de) 664 hpfs_error(s, "unable to find root dir"); 665 else { 666 root->i_atime.tv_sec = local_to_gmt(s, de->read_date); 667 root->i_atime.tv_nsec = 0; 668 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date); 669 root->i_mtime.tv_nsec = 0; 670 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date); 671 root->i_ctime.tv_nsec = 0; 672 hpfs_i(root)->i_ea_size = de->ea_size; 673 hpfs_i(root)->i_parent_dir = root->i_ino; 674 if (root->i_size == -1) 675 root->i_size = 2048; 676 if (root->i_blocks == -1) 677 root->i_blocks = 5; 678 hpfs_brelse4(&qbh); 679 } 680 unlock_kernel(); 681 return 0; 682 683 bail4: brelse(bh2); 684 bail3: brelse(bh1); 685 bail2: brelse(bh0); 686 bail1: 687 bail0: 688 kfree(sbi->sb_bmp_dir); 689 kfree(sbi->sb_cp_table); 690 s->s_fs_info = NULL; 691 kfree(sbi); 692 unlock_kernel(); 693 return -EINVAL; 694 } 695 696 static struct dentry *hpfs_mount(struct file_system_type *fs_type, 697 int flags, const char *dev_name, void *data) 698 { 699 return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); 700 } 701 702 static struct file_system_type hpfs_fs_type = { 703 .owner = THIS_MODULE, 704 .name = "hpfs", 705 .mount = hpfs_mount, 706 .kill_sb = kill_block_super, 707 .fs_flags = FS_REQUIRES_DEV, 708 }; 709 710 static int __init init_hpfs_fs(void) 711 { 712 int err = init_inodecache(); 713 if (err) 714 goto out1; 715 err = register_filesystem(&hpfs_fs_type); 716 if (err) 717 goto out; 718 return 0; 719 out: 720 destroy_inodecache(); 721 out1: 722 return err; 723 } 724 725 static void __exit exit_hpfs_fs(void) 726 { 727 unregister_filesystem(&hpfs_fs_type); 728 destroy_inodecache(); 729 } 730 731 module_init(init_hpfs_fs) 732 module_exit(exit_hpfs_fs) 733 MODULE_LICENSE("GPL"); 734