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_destroy_inode(struct inode *inode) 181 { 182 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 183 } 184 185 static void init_once(void *foo) 186 { 187 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 188 189 mutex_init(&ei->i_mutex); 190 mutex_init(&ei->i_parent_mutex); 191 inode_init_once(&ei->vfs_inode); 192 } 193 194 static int init_inodecache(void) 195 { 196 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 197 sizeof(struct hpfs_inode_info), 198 0, (SLAB_RECLAIM_ACCOUNT| 199 SLAB_MEM_SPREAD), 200 init_once); 201 if (hpfs_inode_cachep == NULL) 202 return -ENOMEM; 203 return 0; 204 } 205 206 static void destroy_inodecache(void) 207 { 208 kmem_cache_destroy(hpfs_inode_cachep); 209 } 210 211 /* 212 * A tiny parser for option strings, stolen from dosfs. 213 * Stolen again from read-only hpfs. 214 * And updated for table-driven option parsing. 215 */ 216 217 enum { 218 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 219 Opt_conv_binary, Opt_conv_text, Opt_conv_auto, 220 Opt_check_none, Opt_check_normal, Opt_check_strict, 221 Opt_err_cont, Opt_err_ro, Opt_err_panic, 222 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 223 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 224 Opt_timeshift, Opt_err, 225 }; 226 227 static const match_table_t tokens = { 228 {Opt_help, "help"}, 229 {Opt_uid, "uid=%u"}, 230 {Opt_gid, "gid=%u"}, 231 {Opt_umask, "umask=%o"}, 232 {Opt_case_lower, "case=lower"}, 233 {Opt_case_asis, "case=asis"}, 234 {Opt_conv_binary, "conv=binary"}, 235 {Opt_conv_text, "conv=text"}, 236 {Opt_conv_auto, "conv=auto"}, 237 {Opt_check_none, "check=none"}, 238 {Opt_check_normal, "check=normal"}, 239 {Opt_check_strict, "check=strict"}, 240 {Opt_err_cont, "errors=continue"}, 241 {Opt_err_ro, "errors=remount-ro"}, 242 {Opt_err_panic, "errors=panic"}, 243 {Opt_eas_no, "eas=no"}, 244 {Opt_eas_ro, "eas=ro"}, 245 {Opt_eas_rw, "eas=rw"}, 246 {Opt_chkdsk_no, "chkdsk=no"}, 247 {Opt_chkdsk_errors, "chkdsk=errors"}, 248 {Opt_chkdsk_always, "chkdsk=always"}, 249 {Opt_timeshift, "timeshift=%d"}, 250 {Opt_err, NULL}, 251 }; 252 253 static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, 254 int *lowercase, int *conv, int *eas, int *chk, int *errs, 255 int *chkdsk, int *timeshift) 256 { 257 char *p; 258 int option; 259 260 if (!opts) 261 return 1; 262 263 /*printk("Parsing opts: '%s'\n",opts);*/ 264 265 while ((p = strsep(&opts, ",")) != NULL) { 266 substring_t args[MAX_OPT_ARGS]; 267 int token; 268 if (!*p) 269 continue; 270 271 token = match_token(p, tokens, args); 272 switch (token) { 273 case Opt_help: 274 return 2; 275 case Opt_uid: 276 if (match_int(args, &option)) 277 return 0; 278 *uid = option; 279 break; 280 case Opt_gid: 281 if (match_int(args, &option)) 282 return 0; 283 *gid = option; 284 break; 285 case Opt_umask: 286 if (match_octal(args, &option)) 287 return 0; 288 *umask = option; 289 break; 290 case Opt_case_lower: 291 *lowercase = 1; 292 break; 293 case Opt_case_asis: 294 *lowercase = 0; 295 break; 296 case Opt_conv_binary: 297 *conv = CONV_BINARY; 298 break; 299 case Opt_conv_text: 300 *conv = CONV_TEXT; 301 break; 302 case Opt_conv_auto: 303 *conv = CONV_AUTO; 304 break; 305 case Opt_check_none: 306 *chk = 0; 307 break; 308 case Opt_check_normal: 309 *chk = 1; 310 break; 311 case Opt_check_strict: 312 *chk = 2; 313 break; 314 case Opt_err_cont: 315 *errs = 0; 316 break; 317 case Opt_err_ro: 318 *errs = 1; 319 break; 320 case Opt_err_panic: 321 *errs = 2; 322 break; 323 case Opt_eas_no: 324 *eas = 0; 325 break; 326 case Opt_eas_ro: 327 *eas = 1; 328 break; 329 case Opt_eas_rw: 330 *eas = 2; 331 break; 332 case Opt_chkdsk_no: 333 *chkdsk = 0; 334 break; 335 case Opt_chkdsk_errors: 336 *chkdsk = 1; 337 break; 338 case Opt_chkdsk_always: 339 *chkdsk = 2; 340 break; 341 case Opt_timeshift: 342 { 343 int m = 1; 344 char *rhs = args[0].from; 345 if (!rhs || !*rhs) 346 return 0; 347 if (*rhs == '-') m = -1; 348 if (*rhs == '+' || *rhs == '-') rhs++; 349 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 350 if (*rhs) 351 return 0; 352 break; 353 } 354 default: 355 return 0; 356 } 357 } 358 return 1; 359 } 360 361 static inline void hpfs_help(void) 362 { 363 printk("\n\ 364 HPFS filesystem options:\n\ 365 help do not mount and display this text\n\ 366 uid=xxx set uid of files that don't have uid specified in eas\n\ 367 gid=xxx set gid of files that don't have gid specified in eas\n\ 368 umask=xxx set mode of files that don't have mode specified in eas\n\ 369 case=lower lowercase all files\n\ 370 case=asis do not lowercase files (default)\n\ 371 conv=binary do not convert CR/LF -> LF (default)\n\ 372 conv=auto convert only files with known text extensions\n\ 373 conv=text convert all files\n\ 374 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 375 check=normal do some checks - it should not crash (default)\n\ 376 check=strict do extra time-consuming checks, used for debugging\n\ 377 errors=continue continue on errors\n\ 378 errors=remount-ro remount read-only if errors found (default)\n\ 379 errors=panic panic on errors\n\ 380 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 381 chkdsk=errors mark fs dirty if errors found (default)\n\ 382 chkdsk=always always mark fs dirty - used for debugging\n\ 383 eas=no ignore extended attributes\n\ 384 eas=ro read but do not write extended attributes\n\ 385 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 386 timeshift=nnn add nnn seconds to file times\n\ 387 \n"); 388 } 389 390 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 391 { 392 uid_t uid; 393 gid_t gid; 394 umode_t umask; 395 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 396 int o; 397 struct hpfs_sb_info *sbi = hpfs_sb(s); 398 char *new_opts = kstrdup(data, GFP_KERNEL); 399 400 *flags |= MS_NOATIME; 401 402 lock_kernel(); 403 lock_super(s); 404 uid = sbi->sb_uid; gid = sbi->sb_gid; 405 umask = 0777 & ~sbi->sb_mode; 406 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv; 407 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 408 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 409 410 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv, 411 &eas, &chk, &errs, &chkdsk, ×hift))) { 412 printk("HPFS: bad mount options.\n"); 413 goto out_err; 414 } 415 if (o == 2) { 416 hpfs_help(); 417 goto out_err; 418 } 419 if (timeshift != sbi->sb_timeshift) { 420 printk("HPFS: timeshift can't be changed using remount.\n"); 421 goto out_err; 422 } 423 424 unmark_dirty(s); 425 426 sbi->sb_uid = uid; sbi->sb_gid = gid; 427 sbi->sb_mode = 0777 & ~umask; 428 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv; 429 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 430 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 431 432 if (!(*flags & MS_RDONLY)) mark_dirty(s); 433 434 replace_mount_options(s, new_opts); 435 436 unlock_super(s); 437 unlock_kernel(); 438 return 0; 439 440 out_err: 441 unlock_super(s); 442 unlock_kernel(); 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 uid_t uid; 470 gid_t gid; 471 umode_t umask; 472 int lowercase, conv, 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 lock_kernel(); 481 482 save_mount_options(s, options); 483 484 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 485 if (!sbi) { 486 unlock_kernel(); 487 return -ENOMEM; 488 } 489 s->s_fs_info = sbi; 490 491 sbi->sb_bmp_dir = NULL; 492 sbi->sb_cp_table = NULL; 493 494 init_MUTEX(&sbi->hpfs_creation_de); 495 496 uid = current_uid(); 497 gid = current_gid(); 498 umask = current_umask(); 499 lowercase = 0; 500 conv = CONV_BINARY; 501 eas = 2; 502 chk = 1; 503 errs = 1; 504 chkdsk = 1; 505 timeshift = 0; 506 507 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv, 508 &eas, &chk, &errs, &chkdsk, ×hift))) { 509 printk("HPFS: bad mount options.\n"); 510 goto bail0; 511 } 512 if (o==2) { 513 hpfs_help(); 514 goto bail0; 515 } 516 517 /*sbi->sb_mounting = 1;*/ 518 sb_set_blocksize(s, 512); 519 sbi->sb_fs_size = -1; 520 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 521 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 522 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 523 524 /* Check magics */ 525 if (/*bootblock->magic != BB_MAGIC 526 ||*/ superblock->magic != SB_MAGIC 527 || spareblock->magic != SP_MAGIC) { 528 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 529 goto bail4; 530 } 531 532 /* Check version */ 533 if (!(s->s_flags & MS_RDONLY) && 534 superblock->funcversion != 2 && superblock->funcversion != 3) { 535 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 536 (int)superblock->version, (int)superblock->funcversion); 537 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"); 538 goto bail4; 539 } 540 541 s->s_flags |= MS_NOATIME; 542 543 /* Fill superblock stuff */ 544 s->s_magic = HPFS_SUPER_MAGIC; 545 s->s_op = &hpfs_sops; 546 547 sbi->sb_root = superblock->root; 548 sbi->sb_fs_size = superblock->n_sectors; 549 sbi->sb_bitmaps = superblock->bitmaps; 550 sbi->sb_dirband_start = superblock->dir_band_start; 551 sbi->sb_dirband_size = superblock->n_dir_band; 552 sbi->sb_dmap = superblock->dir_band_bitmap; 553 sbi->sb_uid = uid; 554 sbi->sb_gid = gid; 555 sbi->sb_mode = 0777 & ~umask; 556 sbi->sb_n_free = -1; 557 sbi->sb_n_free_dnodes = -1; 558 sbi->sb_lowercase = lowercase; 559 sbi->sb_conv = conv; 560 sbi->sb_eas = eas; 561 sbi->sb_chk = chk; 562 sbi->sb_chkdsk = chkdsk; 563 sbi->sb_err = errs; 564 sbi->sb_timeshift = timeshift; 565 sbi->sb_was_error = 0; 566 sbi->sb_cp_table = NULL; 567 sbi->sb_c_bitmap = -1; 568 sbi->sb_max_fwd_alloc = 0xffffff; 569 570 /* Load bitmap directory */ 571 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps))) 572 goto bail4; 573 574 /* Check for general fs errors*/ 575 if (spareblock->dirty && !spareblock->old_wrote) { 576 if (errs == 2) { 577 printk("HPFS: Improperly stopped, not mounted\n"); 578 goto bail4; 579 } 580 hpfs_error(s, "improperly stopped"); 581 } 582 583 if (!(s->s_flags & MS_RDONLY)) { 584 spareblock->dirty = 1; 585 spareblock->old_wrote = 0; 586 mark_buffer_dirty(bh2); 587 } 588 589 if (spareblock->hotfixes_used || spareblock->n_spares_used) { 590 if (errs >= 2) { 591 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 592 mark_dirty(s); 593 goto bail4; 594 } 595 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 596 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 597 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 598 } 599 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) { 600 if (errs >= 2) { 601 printk("HPFS: Spare dnodes used, try chkdsk\n"); 602 mark_dirty(s); 603 goto bail4; 604 } 605 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 606 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 607 } 608 if (chk) { 609 unsigned a; 610 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band || 611 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) { 612 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 613 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band); 614 goto bail4; 615 } 616 a = sbi->sb_dirband_size; 617 sbi->sb_dirband_size = 0; 618 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") || 619 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") || 620 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) { 621 mark_dirty(s); 622 goto bail4; 623 } 624 sbi->sb_dirband_size = a; 625 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 626 627 /* Load code page table */ 628 if (spareblock->n_code_pages) 629 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir))) 630 printk("HPFS: Warning: code page support is disabled\n"); 631 632 brelse(bh2); 633 brelse(bh1); 634 brelse(bh0); 635 636 root = iget_locked(s, sbi->sb_root); 637 if (!root) 638 goto bail0; 639 hpfs_init_inode(root); 640 hpfs_read_inode(root); 641 unlock_new_inode(root); 642 s->s_root = d_alloc_root(root); 643 if (!s->s_root) { 644 iput(root); 645 goto bail0; 646 } 647 hpfs_set_dentry_operations(s->s_root); 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, de->read_date); 660 root->i_atime.tv_nsec = 0; 661 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date); 662 root->i_mtime.tv_nsec = 0; 663 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date); 664 root->i_ctime.tv_nsec = 0; 665 hpfs_i(root)->i_ea_size = 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 unlock_kernel(); 674 return 0; 675 676 bail4: brelse(bh2); 677 bail3: brelse(bh1); 678 bail2: brelse(bh0); 679 bail1: 680 bail0: 681 kfree(sbi->sb_bmp_dir); 682 kfree(sbi->sb_cp_table); 683 s->s_fs_info = NULL; 684 kfree(sbi); 685 unlock_kernel(); 686 return -EINVAL; 687 } 688 689 static int hpfs_get_sb(struct file_system_type *fs_type, 690 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 691 { 692 return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super, 693 mnt); 694 } 695 696 static struct file_system_type hpfs_fs_type = { 697 .owner = THIS_MODULE, 698 .name = "hpfs", 699 .get_sb = hpfs_get_sb, 700 .kill_sb = kill_block_super, 701 .fs_flags = FS_REQUIRES_DEV, 702 }; 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