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 16 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ 17 18 static void mark_dirty(struct super_block *s) 19 { 20 if (hpfs_sb(s)->sb_chkdsk && !(s->s_flags & MS_RDONLY)) { 21 struct buffer_head *bh; 22 struct hpfs_spare_block *sb; 23 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 24 sb->dirty = 1; 25 sb->old_wrote = 0; 26 mark_buffer_dirty(bh); 27 brelse(bh); 28 } 29 } 30 } 31 32 /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there 33 were errors) */ 34 35 static void unmark_dirty(struct super_block *s) 36 { 37 struct buffer_head *bh; 38 struct hpfs_spare_block *sb; 39 if (s->s_flags & MS_RDONLY) return; 40 if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { 41 sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; 42 sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; 43 mark_buffer_dirty(bh); 44 brelse(bh); 45 } 46 } 47 48 /* Filesystem error... */ 49 50 #define ERR_BUF_SIZE 1024 51 52 void hpfs_error(struct super_block *s, char *m,...) 53 { 54 char *buf; 55 va_list l; 56 va_start(l, m); 57 if (!(buf = kmalloc(ERR_BUF_SIZE, GFP_KERNEL))) 58 printk("HPFS: No memory for error message '%s'\n",m); 59 else if (vsprintf(buf, m, l) >= ERR_BUF_SIZE) 60 printk("HPFS: Grrrr... Kernel memory corrupted ... going on, but it'll crash very soon :-(\n"); 61 printk("HPFS: filesystem error: "); 62 if (buf) printk("%s", buf); 63 else printk("%s\n",m); 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 kfree(buf); 80 hpfs_sb(s)->sb_was_error = 1; 81 } 82 83 /* 84 * A little trick to detect cycles in many hpfs structures and don't let the 85 * kernel crash on corrupted filesystem. When first called, set c2 to 0. 86 * 87 * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories 88 * nested each in other, chkdsk locked up happilly. 89 */ 90 91 int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, 92 char *msg) 93 { 94 if (*c2 && *c1 == key) { 95 hpfs_error(s, "cycle detected on key %08x in %s", key, msg); 96 return 1; 97 } 98 (*c2)++; 99 if (!((*c2 - 1) & *c2)) *c1 = key; 100 return 0; 101 } 102 103 static void hpfs_put_super(struct super_block *s) 104 { 105 struct hpfs_sb_info *sbi = hpfs_sb(s); 106 kfree(sbi->sb_cp_table); 107 kfree(sbi->sb_bmp_dir); 108 unmark_dirty(s); 109 s->s_fs_info = NULL; 110 kfree(sbi); 111 } 112 113 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) 114 { 115 struct quad_buffer_head qbh; 116 unsigned *bits; 117 unsigned i, count; 118 if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0; 119 count = 0; 120 for (i = 0; i < 2048 / sizeof(unsigned); i++) { 121 unsigned b; 122 if (!bits[i]) continue; 123 for (b = bits[i]; b; b>>=1) count += b & 1; 124 } 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 lock_kernel(); 144 145 /*if (sbi->sb_n_free == -1) {*/ 146 sbi->sb_n_free = count_bitmaps(s); 147 sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap); 148 /*}*/ 149 buf->f_type = s->s_magic; 150 buf->f_bsize = 512; 151 buf->f_blocks = sbi->sb_fs_size; 152 buf->f_bfree = sbi->sb_n_free; 153 buf->f_bavail = sbi->sb_n_free; 154 buf->f_files = sbi->sb_dirband_size / 4; 155 buf->f_ffree = sbi->sb_n_free_dnodes; 156 buf->f_namelen = 254; 157 158 unlock_kernel(); 159 160 return 0; 161 } 162 163 static kmem_cache_t * hpfs_inode_cachep; 164 165 static struct inode *hpfs_alloc_inode(struct super_block *sb) 166 { 167 struct hpfs_inode_info *ei; 168 ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, SLAB_NOFS); 169 if (!ei) 170 return NULL; 171 ei->vfs_inode.i_version = 1; 172 return &ei->vfs_inode; 173 } 174 175 static void hpfs_destroy_inode(struct inode *inode) 176 { 177 kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); 178 } 179 180 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) 181 { 182 struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; 183 184 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 185 SLAB_CTOR_CONSTRUCTOR) { 186 mutex_init(&ei->i_mutex); 187 mutex_init(&ei->i_parent_mutex); 188 inode_init_once(&ei->vfs_inode); 189 } 190 } 191 192 static int init_inodecache(void) 193 { 194 hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", 195 sizeof(struct hpfs_inode_info), 196 0, (SLAB_RECLAIM_ACCOUNT| 197 SLAB_MEM_SPREAD), 198 init_once, NULL); 199 if (hpfs_inode_cachep == NULL) 200 return -ENOMEM; 201 return 0; 202 } 203 204 static void destroy_inodecache(void) 205 { 206 kmem_cache_destroy(hpfs_inode_cachep); 207 } 208 209 /* 210 * A tiny parser for option strings, stolen from dosfs. 211 * Stolen again from read-only hpfs. 212 * And updated for table-driven option parsing. 213 */ 214 215 enum { 216 Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, 217 Opt_conv_binary, Opt_conv_text, Opt_conv_auto, 218 Opt_check_none, Opt_check_normal, Opt_check_strict, 219 Opt_err_cont, Opt_err_ro, Opt_err_panic, 220 Opt_eas_no, Opt_eas_ro, Opt_eas_rw, 221 Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, 222 Opt_timeshift, Opt_err, 223 }; 224 225 static match_table_t tokens = { 226 {Opt_help, "help"}, 227 {Opt_uid, "uid=%u"}, 228 {Opt_gid, "gid=%u"}, 229 {Opt_umask, "umask=%o"}, 230 {Opt_case_lower, "case=lower"}, 231 {Opt_case_asis, "case=asis"}, 232 {Opt_conv_binary, "conv=binary"}, 233 {Opt_conv_text, "conv=text"}, 234 {Opt_conv_auto, "conv=auto"}, 235 {Opt_check_none, "check=none"}, 236 {Opt_check_normal, "check=normal"}, 237 {Opt_check_strict, "check=strict"}, 238 {Opt_err_cont, "errors=continue"}, 239 {Opt_err_ro, "errors=remount-ro"}, 240 {Opt_err_panic, "errors=panic"}, 241 {Opt_eas_no, "eas=no"}, 242 {Opt_eas_ro, "eas=ro"}, 243 {Opt_eas_rw, "eas=rw"}, 244 {Opt_chkdsk_no, "chkdsk=no"}, 245 {Opt_chkdsk_errors, "chkdsk=errors"}, 246 {Opt_chkdsk_always, "chkdsk=always"}, 247 {Opt_timeshift, "timeshift=%d"}, 248 {Opt_err, NULL}, 249 }; 250 251 static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, 252 int *lowercase, int *conv, int *eas, int *chk, int *errs, 253 int *chkdsk, int *timeshift) 254 { 255 char *p; 256 int option; 257 258 if (!opts) 259 return 1; 260 261 /*printk("Parsing opts: '%s'\n",opts);*/ 262 263 while ((p = strsep(&opts, ",")) != NULL) { 264 substring_t args[MAX_OPT_ARGS]; 265 int token; 266 if (!*p) 267 continue; 268 269 token = match_token(p, tokens, args); 270 switch (token) { 271 case Opt_help: 272 return 2; 273 case Opt_uid: 274 if (match_int(args, &option)) 275 return 0; 276 *uid = option; 277 break; 278 case Opt_gid: 279 if (match_int(args, &option)) 280 return 0; 281 *gid = option; 282 break; 283 case Opt_umask: 284 if (match_octal(args, &option)) 285 return 0; 286 *umask = option; 287 break; 288 case Opt_case_lower: 289 *lowercase = 1; 290 break; 291 case Opt_case_asis: 292 *lowercase = 0; 293 break; 294 case Opt_conv_binary: 295 *conv = CONV_BINARY; 296 break; 297 case Opt_conv_text: 298 *conv = CONV_TEXT; 299 break; 300 case Opt_conv_auto: 301 *conv = CONV_AUTO; 302 break; 303 case Opt_check_none: 304 *chk = 0; 305 break; 306 case Opt_check_normal: 307 *chk = 1; 308 break; 309 case Opt_check_strict: 310 *chk = 2; 311 break; 312 case Opt_err_cont: 313 *errs = 0; 314 break; 315 case Opt_err_ro: 316 *errs = 1; 317 break; 318 case Opt_err_panic: 319 *errs = 2; 320 break; 321 case Opt_eas_no: 322 *eas = 0; 323 break; 324 case Opt_eas_ro: 325 *eas = 1; 326 break; 327 case Opt_eas_rw: 328 *eas = 2; 329 break; 330 case Opt_chkdsk_no: 331 *chkdsk = 0; 332 break; 333 case Opt_chkdsk_errors: 334 *chkdsk = 1; 335 break; 336 case Opt_chkdsk_always: 337 *chkdsk = 2; 338 break; 339 case Opt_timeshift: 340 { 341 int m = 1; 342 char *rhs = args[0].from; 343 if (!rhs || !*rhs) 344 return 0; 345 if (*rhs == '-') m = -1; 346 if (*rhs == '+' || *rhs == '-') rhs++; 347 *timeshift = simple_strtoul(rhs, &rhs, 0) * m; 348 if (*rhs) 349 return 0; 350 break; 351 } 352 default: 353 return 0; 354 } 355 } 356 return 1; 357 } 358 359 static inline void hpfs_help(void) 360 { 361 printk("\n\ 362 HPFS filesystem options:\n\ 363 help do not mount and display this text\n\ 364 uid=xxx set uid of files that don't have uid specified in eas\n\ 365 gid=xxx set gid of files that don't have gid specified in eas\n\ 366 umask=xxx set mode of files that don't have mode specified in eas\n\ 367 case=lower lowercase all files\n\ 368 case=asis do not lowercase files (default)\n\ 369 conv=binary do not convert CR/LF -> LF (default)\n\ 370 conv=auto convert only files with known text extensions\n\ 371 conv=text convert all files\n\ 372 check=none no fs checks - kernel may crash on corrupted filesystem\n\ 373 check=normal do some checks - it should not crash (default)\n\ 374 check=strict do extra time-consuming checks, used for debugging\n\ 375 errors=continue continue on errors\n\ 376 errors=remount-ro remount read-only if errors found (default)\n\ 377 errors=panic panic on errors\n\ 378 chkdsk=no do not mark fs for chkdsking even if there were errors\n\ 379 chkdsk=errors mark fs dirty if errors found (default)\n\ 380 chkdsk=always always mark fs dirty - used for debugging\n\ 381 eas=no ignore extended attributes\n\ 382 eas=ro read but do not write extended attributes\n\ 383 eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ 384 timeshift=nnn add nnn seconds to file times\n\ 385 \n"); 386 } 387 388 static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) 389 { 390 uid_t uid; 391 gid_t gid; 392 umode_t umask; 393 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 394 int o; 395 struct hpfs_sb_info *sbi = hpfs_sb(s); 396 397 *flags |= MS_NOATIME; 398 399 uid = sbi->sb_uid; gid = sbi->sb_gid; 400 umask = 0777 & ~sbi->sb_mode; 401 lowercase = sbi->sb_lowercase; conv = sbi->sb_conv; 402 eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; 403 errs = sbi->sb_err; timeshift = sbi->sb_timeshift; 404 405 if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv, 406 &eas, &chk, &errs, &chkdsk, ×hift))) { 407 printk("HPFS: bad mount options.\n"); 408 return 1; 409 } 410 if (o == 2) { 411 hpfs_help(); 412 return 1; 413 } 414 if (timeshift != sbi->sb_timeshift) { 415 printk("HPFS: timeshift can't be changed using remount.\n"); 416 return 1; 417 } 418 419 unmark_dirty(s); 420 421 sbi->sb_uid = uid; sbi->sb_gid = gid; 422 sbi->sb_mode = 0777 & ~umask; 423 sbi->sb_lowercase = lowercase; sbi->sb_conv = conv; 424 sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; 425 sbi->sb_err = errs; sbi->sb_timeshift = timeshift; 426 427 if (!(*flags & MS_RDONLY)) mark_dirty(s); 428 429 return 0; 430 } 431 432 /* Super operations */ 433 434 static struct super_operations hpfs_sops = 435 { 436 .alloc_inode = hpfs_alloc_inode, 437 .destroy_inode = hpfs_destroy_inode, 438 .delete_inode = hpfs_delete_inode, 439 .put_super = hpfs_put_super, 440 .statfs = hpfs_statfs, 441 .remount_fs = hpfs_remount_fs, 442 }; 443 444 static int hpfs_fill_super(struct super_block *s, void *options, int silent) 445 { 446 struct buffer_head *bh0, *bh1, *bh2; 447 struct hpfs_boot_block *bootblock; 448 struct hpfs_super_block *superblock; 449 struct hpfs_spare_block *spareblock; 450 struct hpfs_sb_info *sbi; 451 struct inode *root; 452 453 uid_t uid; 454 gid_t gid; 455 umode_t umask; 456 int lowercase, conv, eas, chk, errs, chkdsk, timeshift; 457 458 dnode_secno root_dno; 459 struct hpfs_dirent *de = NULL; 460 struct quad_buffer_head qbh; 461 462 int o; 463 464 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 465 if (!sbi) 466 return -ENOMEM; 467 s->s_fs_info = sbi; 468 469 sbi->sb_bmp_dir = NULL; 470 sbi->sb_cp_table = NULL; 471 472 init_MUTEX(&sbi->hpfs_creation_de); 473 474 uid = current->uid; 475 gid = current->gid; 476 umask = current->fs->umask; 477 lowercase = 0; 478 conv = CONV_BINARY; 479 eas = 2; 480 chk = 1; 481 errs = 1; 482 chkdsk = 1; 483 timeshift = 0; 484 485 if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv, 486 &eas, &chk, &errs, &chkdsk, ×hift))) { 487 printk("HPFS: bad mount options.\n"); 488 goto bail0; 489 } 490 if (o==2) { 491 hpfs_help(); 492 goto bail0; 493 } 494 495 /*sbi->sb_mounting = 1;*/ 496 sb_set_blocksize(s, 512); 497 sbi->sb_fs_size = -1; 498 if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; 499 if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; 500 if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; 501 502 /* Check magics */ 503 if (/*bootblock->magic != BB_MAGIC 504 ||*/ superblock->magic != SB_MAGIC 505 || spareblock->magic != SP_MAGIC) { 506 if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); 507 goto bail4; 508 } 509 510 /* Check version */ 511 if (!(s->s_flags & MS_RDONLY) && 512 superblock->funcversion != 2 && superblock->funcversion != 3) { 513 printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", 514 (int)superblock->version, (int)superblock->funcversion); 515 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"); 516 goto bail4; 517 } 518 519 s->s_flags |= MS_NOATIME; 520 521 /* Fill superblock stuff */ 522 s->s_magic = HPFS_SUPER_MAGIC; 523 s->s_op = &hpfs_sops; 524 525 sbi->sb_root = superblock->root; 526 sbi->sb_fs_size = superblock->n_sectors; 527 sbi->sb_bitmaps = superblock->bitmaps; 528 sbi->sb_dirband_start = superblock->dir_band_start; 529 sbi->sb_dirband_size = superblock->n_dir_band; 530 sbi->sb_dmap = superblock->dir_band_bitmap; 531 sbi->sb_uid = uid; 532 sbi->sb_gid = gid; 533 sbi->sb_mode = 0777 & ~umask; 534 sbi->sb_n_free = -1; 535 sbi->sb_n_free_dnodes = -1; 536 sbi->sb_lowercase = lowercase; 537 sbi->sb_conv = conv; 538 sbi->sb_eas = eas; 539 sbi->sb_chk = chk; 540 sbi->sb_chkdsk = chkdsk; 541 sbi->sb_err = errs; 542 sbi->sb_timeshift = timeshift; 543 sbi->sb_was_error = 0; 544 sbi->sb_cp_table = NULL; 545 sbi->sb_c_bitmap = -1; 546 sbi->sb_max_fwd_alloc = 0xffffff; 547 548 /* Load bitmap directory */ 549 if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps))) 550 goto bail4; 551 552 /* Check for general fs errors*/ 553 if (spareblock->dirty && !spareblock->old_wrote) { 554 if (errs == 2) { 555 printk("HPFS: Improperly stopped, not mounted\n"); 556 goto bail4; 557 } 558 hpfs_error(s, "improperly stopped"); 559 } 560 561 if (!(s->s_flags & MS_RDONLY)) { 562 spareblock->dirty = 1; 563 spareblock->old_wrote = 0; 564 mark_buffer_dirty(bh2); 565 } 566 567 if (spareblock->hotfixes_used || spareblock->n_spares_used) { 568 if (errs >= 2) { 569 printk("HPFS: Hotfixes not supported here, try chkdsk\n"); 570 mark_dirty(s); 571 goto bail4; 572 } 573 hpfs_error(s, "hotfixes not supported here, try chkdsk"); 574 if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); 575 else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); 576 } 577 if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) { 578 if (errs >= 2) { 579 printk("HPFS: Spare dnodes used, try chkdsk\n"); 580 mark_dirty(s); 581 goto bail4; 582 } 583 hpfs_error(s, "warning: spare dnodes used, try chkdsk"); 584 if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); 585 } 586 if (chk) { 587 unsigned a; 588 if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band || 589 superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) { 590 hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", 591 superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band); 592 goto bail4; 593 } 594 a = sbi->sb_dirband_size; 595 sbi->sb_dirband_size = 0; 596 if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") || 597 hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") || 598 hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) { 599 mark_dirty(s); 600 goto bail4; 601 } 602 sbi->sb_dirband_size = a; 603 } else printk("HPFS: You really don't want any checks? You are crazy...\n"); 604 605 /* Load code page table */ 606 if (spareblock->n_code_pages) 607 if (!(sbi->sb_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir))) 608 printk("HPFS: Warning: code page support is disabled\n"); 609 610 brelse(bh2); 611 brelse(bh1); 612 brelse(bh0); 613 614 root = iget_locked(s, sbi->sb_root); 615 if (!root) 616 goto bail0; 617 hpfs_init_inode(root); 618 hpfs_read_inode(root); 619 unlock_new_inode(root); 620 s->s_root = d_alloc_root(root); 621 if (!s->s_root) { 622 iput(root); 623 goto bail0; 624 } 625 hpfs_set_dentry_operations(s->s_root); 626 627 /* 628 * find the root directory's . pointer & finish filling in the inode 629 */ 630 631 root_dno = hpfs_fnode_dno(s, sbi->sb_root); 632 if (root_dno) 633 de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); 634 if (!de) 635 hpfs_error(s, "unable to find root dir"); 636 else { 637 root->i_atime.tv_sec = local_to_gmt(s, de->read_date); 638 root->i_atime.tv_nsec = 0; 639 root->i_mtime.tv_sec = local_to_gmt(s, de->write_date); 640 root->i_mtime.tv_nsec = 0; 641 root->i_ctime.tv_sec = local_to_gmt(s, de->creation_date); 642 root->i_ctime.tv_nsec = 0; 643 hpfs_i(root)->i_ea_size = de->ea_size; 644 hpfs_i(root)->i_parent_dir = root->i_ino; 645 if (root->i_size == -1) 646 root->i_size = 2048; 647 if (root->i_blocks == -1) 648 root->i_blocks = 5; 649 hpfs_brelse4(&qbh); 650 } 651 return 0; 652 653 bail4: brelse(bh2); 654 bail3: brelse(bh1); 655 bail2: brelse(bh0); 656 bail1: 657 bail0: 658 kfree(sbi->sb_bmp_dir); 659 kfree(sbi->sb_cp_table); 660 s->s_fs_info = NULL; 661 kfree(sbi); 662 return -EINVAL; 663 } 664 665 static int hpfs_get_sb(struct file_system_type *fs_type, 666 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 667 { 668 return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super, 669 mnt); 670 } 671 672 static struct file_system_type hpfs_fs_type = { 673 .owner = THIS_MODULE, 674 .name = "hpfs", 675 .get_sb = hpfs_get_sb, 676 .kill_sb = kill_block_super, 677 .fs_flags = FS_REQUIRES_DEV, 678 }; 679 680 static int __init init_hpfs_fs(void) 681 { 682 int err = init_inodecache(); 683 if (err) 684 goto out1; 685 err = register_filesystem(&hpfs_fs_type); 686 if (err) 687 goto out; 688 return 0; 689 out: 690 destroy_inodecache(); 691 out1: 692 return err; 693 } 694 695 static void __exit exit_hpfs_fs(void) 696 { 697 unregister_filesystem(&hpfs_fs_type); 698 destroy_inodecache(); 699 } 700 701 module_init(init_hpfs_fs) 702 module_exit(exit_hpfs_fs) 703 MODULE_LICENSE("GPL"); 704