1 /* 2 * linux/fs/hfsplus/super.c 3 * 4 * Copyright (C) 2001 5 * Brad Boyer (flar@allandria.com) 6 * (C) 2003 Ardis Technologies <roman@ardistech.com> 7 * 8 */ 9 10 #include <linux/module.h> 11 #include <linux/init.h> 12 #include <linux/pagemap.h> 13 #include <linux/blkdev.h> 14 #include <linux/fs.h> 15 #include <linux/slab.h> 16 #include <linux/vfs.h> 17 #include <linux/nls.h> 18 19 static struct inode *hfsplus_alloc_inode(struct super_block *sb); 20 static void hfsplus_destroy_inode(struct inode *inode); 21 22 #include "hfsplus_fs.h" 23 24 static int hfsplus_system_read_inode(struct inode *inode) 25 { 26 struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; 27 28 switch (inode->i_ino) { 29 case HFSPLUS_EXT_CNID: 30 hfsplus_inode_read_fork(inode, &vhdr->ext_file); 31 inode->i_mapping->a_ops = &hfsplus_btree_aops; 32 break; 33 case HFSPLUS_CAT_CNID: 34 hfsplus_inode_read_fork(inode, &vhdr->cat_file); 35 inode->i_mapping->a_ops = &hfsplus_btree_aops; 36 break; 37 case HFSPLUS_ALLOC_CNID: 38 hfsplus_inode_read_fork(inode, &vhdr->alloc_file); 39 inode->i_mapping->a_ops = &hfsplus_aops; 40 break; 41 case HFSPLUS_START_CNID: 42 hfsplus_inode_read_fork(inode, &vhdr->start_file); 43 break; 44 case HFSPLUS_ATTR_CNID: 45 hfsplus_inode_read_fork(inode, &vhdr->attr_file); 46 inode->i_mapping->a_ops = &hfsplus_btree_aops; 47 break; 48 default: 49 return -EIO; 50 } 51 52 return 0; 53 } 54 55 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) 56 { 57 struct hfs_find_data fd; 58 struct inode *inode; 59 int err; 60 61 inode = iget_locked(sb, ino); 62 if (!inode) 63 return ERR_PTR(-ENOMEM); 64 if (!(inode->i_state & I_NEW)) 65 return inode; 66 67 INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); 68 mutex_init(&HFSPLUS_I(inode)->extents_lock); 69 HFSPLUS_I(inode)->flags = 0; 70 HFSPLUS_I(inode)->extent_state = 0; 71 HFSPLUS_I(inode)->rsrc_inode = NULL; 72 atomic_set(&HFSPLUS_I(inode)->opencnt, 0); 73 74 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || 75 inode->i_ino == HFSPLUS_ROOT_CNID) { 76 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); 77 if (!err) { 78 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); 79 if (!err) 80 err = hfsplus_cat_read_inode(inode, &fd); 81 hfs_find_exit(&fd); 82 } 83 } else { 84 err = hfsplus_system_read_inode(inode); 85 } 86 87 if (err) { 88 iget_failed(inode); 89 return ERR_PTR(err); 90 } 91 92 unlock_new_inode(inode); 93 return inode; 94 } 95 96 static int hfsplus_system_write_inode(struct inode *inode) 97 { 98 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 99 struct hfsplus_vh *vhdr = sbi->s_vhdr; 100 struct hfsplus_fork_raw *fork; 101 struct hfs_btree *tree = NULL; 102 103 switch (inode->i_ino) { 104 case HFSPLUS_EXT_CNID: 105 fork = &vhdr->ext_file; 106 tree = sbi->ext_tree; 107 break; 108 case HFSPLUS_CAT_CNID: 109 fork = &vhdr->cat_file; 110 tree = sbi->cat_tree; 111 break; 112 case HFSPLUS_ALLOC_CNID: 113 fork = &vhdr->alloc_file; 114 break; 115 case HFSPLUS_START_CNID: 116 fork = &vhdr->start_file; 117 break; 118 case HFSPLUS_ATTR_CNID: 119 fork = &vhdr->attr_file; 120 tree = sbi->attr_tree; 121 default: 122 return -EIO; 123 } 124 125 if (fork->total_size != cpu_to_be64(inode->i_size)) { 126 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); 127 inode->i_sb->s_dirt = 1; 128 } 129 hfsplus_inode_write_fork(inode, fork); 130 if (tree) 131 hfs_btree_write(tree); 132 return 0; 133 } 134 135 static int hfsplus_write_inode(struct inode *inode, 136 struct writeback_control *wbc) 137 { 138 int err; 139 140 dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); 141 142 err = hfsplus_ext_write_extent(inode); 143 if (err) 144 return err; 145 146 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || 147 inode->i_ino == HFSPLUS_ROOT_CNID) 148 return hfsplus_cat_write_inode(inode); 149 else 150 return hfsplus_system_write_inode(inode); 151 } 152 153 static void hfsplus_evict_inode(struct inode *inode) 154 { 155 dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); 156 truncate_inode_pages(&inode->i_data, 0); 157 end_writeback(inode); 158 if (HFSPLUS_IS_RSRC(inode)) { 159 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; 160 iput(HFSPLUS_I(inode)->rsrc_inode); 161 } 162 } 163 164 int hfsplus_sync_fs(struct super_block *sb, int wait) 165 { 166 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 167 struct hfsplus_vh *vhdr = sbi->s_vhdr; 168 int write_backup = 0; 169 int error, error2; 170 171 if (!wait) 172 return 0; 173 174 dprint(DBG_SUPER, "hfsplus_write_super\n"); 175 176 sb->s_dirt = 0; 177 178 /* 179 * Explicitly write out the special metadata inodes. 180 * 181 * While these special inodes are marked as hashed and written 182 * out peridocically by the flusher threads we redirty them 183 * during writeout of normal inodes, and thus the life lock 184 * prevents us from getting the latest state to disk. 185 */ 186 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); 187 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); 188 if (!error) 189 error = error2; 190 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); 191 if (!error) 192 error = error2; 193 194 mutex_lock(&sbi->vh_mutex); 195 mutex_lock(&sbi->alloc_mutex); 196 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); 197 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); 198 vhdr->folder_count = cpu_to_be32(sbi->folder_count); 199 vhdr->file_count = cpu_to_be32(sbi->file_count); 200 201 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { 202 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); 203 write_backup = 1; 204 } 205 206 error2 = hfsplus_submit_bio(sb, 207 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, 208 sbi->s_vhdr_buf, NULL, WRITE_SYNC); 209 if (!error) 210 error = error2; 211 if (!write_backup) 212 goto out; 213 214 error2 = hfsplus_submit_bio(sb, 215 sbi->part_start + sbi->sect_count - 2, 216 sbi->s_backup_vhdr_buf, NULL, WRITE_SYNC); 217 if (!error) 218 error2 = error; 219 out: 220 mutex_unlock(&sbi->alloc_mutex); 221 mutex_unlock(&sbi->vh_mutex); 222 223 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) 224 blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 225 226 return error; 227 } 228 229 static void hfsplus_write_super(struct super_block *sb) 230 { 231 if (!(sb->s_flags & MS_RDONLY)) 232 hfsplus_sync_fs(sb, 1); 233 else 234 sb->s_dirt = 0; 235 } 236 237 static void hfsplus_put_super(struct super_block *sb) 238 { 239 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 240 241 dprint(DBG_SUPER, "hfsplus_put_super\n"); 242 243 if (!sb->s_fs_info) 244 return; 245 246 if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { 247 struct hfsplus_vh *vhdr = sbi->s_vhdr; 248 249 vhdr->modify_date = hfsp_now2mt(); 250 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); 251 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); 252 253 hfsplus_sync_fs(sb, 1); 254 } 255 256 hfs_btree_close(sbi->cat_tree); 257 hfs_btree_close(sbi->ext_tree); 258 iput(sbi->alloc_file); 259 iput(sbi->hidden_dir); 260 kfree(sbi->s_vhdr_buf); 261 kfree(sbi->s_backup_vhdr_buf); 262 unload_nls(sbi->nls); 263 kfree(sb->s_fs_info); 264 sb->s_fs_info = NULL; 265 } 266 267 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) 268 { 269 struct super_block *sb = dentry->d_sb; 270 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 271 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 272 273 buf->f_type = HFSPLUS_SUPER_MAGIC; 274 buf->f_bsize = sb->s_blocksize; 275 buf->f_blocks = sbi->total_blocks << sbi->fs_shift; 276 buf->f_bfree = sbi->free_blocks << sbi->fs_shift; 277 buf->f_bavail = buf->f_bfree; 278 buf->f_files = 0xFFFFFFFF; 279 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; 280 buf->f_fsid.val[0] = (u32)id; 281 buf->f_fsid.val[1] = (u32)(id >> 32); 282 buf->f_namelen = HFSPLUS_MAX_STRLEN; 283 284 return 0; 285 } 286 287 static int hfsplus_remount(struct super_block *sb, int *flags, char *data) 288 { 289 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 290 return 0; 291 if (!(*flags & MS_RDONLY)) { 292 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; 293 int force = 0; 294 295 if (!hfsplus_parse_options_remount(data, &force)) 296 return -EINVAL; 297 298 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { 299 printk(KERN_WARNING "hfs: filesystem was " 300 "not cleanly unmounted, " 301 "running fsck.hfsplus is recommended. " 302 "leaving read-only.\n"); 303 sb->s_flags |= MS_RDONLY; 304 *flags |= MS_RDONLY; 305 } else if (force) { 306 /* nothing */ 307 } else if (vhdr->attributes & 308 cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { 309 printk(KERN_WARNING "hfs: filesystem is marked locked, " 310 "leaving read-only.\n"); 311 sb->s_flags |= MS_RDONLY; 312 *flags |= MS_RDONLY; 313 } else if (vhdr->attributes & 314 cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { 315 printk(KERN_WARNING "hfs: filesystem is " 316 "marked journaled, " 317 "leaving read-only.\n"); 318 sb->s_flags |= MS_RDONLY; 319 *flags |= MS_RDONLY; 320 } 321 } 322 return 0; 323 } 324 325 static const struct super_operations hfsplus_sops = { 326 .alloc_inode = hfsplus_alloc_inode, 327 .destroy_inode = hfsplus_destroy_inode, 328 .write_inode = hfsplus_write_inode, 329 .evict_inode = hfsplus_evict_inode, 330 .put_super = hfsplus_put_super, 331 .write_super = hfsplus_write_super, 332 .sync_fs = hfsplus_sync_fs, 333 .statfs = hfsplus_statfs, 334 .remount_fs = hfsplus_remount, 335 .show_options = hfsplus_show_options, 336 }; 337 338 static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) 339 { 340 struct hfsplus_vh *vhdr; 341 struct hfsplus_sb_info *sbi; 342 hfsplus_cat_entry entry; 343 struct hfs_find_data fd; 344 struct inode *root, *inode; 345 struct qstr str; 346 struct nls_table *nls = NULL; 347 u64 last_fs_block, last_fs_page; 348 int err; 349 350 err = -EINVAL; 351 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 352 if (!sbi) 353 goto out; 354 355 sb->s_fs_info = sbi; 356 mutex_init(&sbi->alloc_mutex); 357 mutex_init(&sbi->vh_mutex); 358 hfsplus_fill_defaults(sbi); 359 360 err = -EINVAL; 361 if (!hfsplus_parse_options(data, sbi)) { 362 printk(KERN_ERR "hfs: unable to parse mount options\n"); 363 goto out_unload_nls; 364 } 365 366 /* temporarily use utf8 to correctly find the hidden dir below */ 367 nls = sbi->nls; 368 sbi->nls = load_nls("utf8"); 369 if (!sbi->nls) { 370 printk(KERN_ERR "hfs: unable to load nls for utf8\n"); 371 goto out_unload_nls; 372 } 373 374 /* Grab the volume header */ 375 if (hfsplus_read_wrapper(sb)) { 376 if (!silent) 377 printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); 378 goto out_unload_nls; 379 } 380 vhdr = sbi->s_vhdr; 381 382 /* Copy parts of the volume header into the superblock */ 383 sb->s_magic = HFSPLUS_VOLHEAD_SIG; 384 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || 385 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { 386 printk(KERN_ERR "hfs: wrong filesystem version\n"); 387 goto out_free_vhdr; 388 } 389 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); 390 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); 391 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); 392 sbi->file_count = be32_to_cpu(vhdr->file_count); 393 sbi->folder_count = be32_to_cpu(vhdr->folder_count); 394 sbi->data_clump_blocks = 395 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; 396 if (!sbi->data_clump_blocks) 397 sbi->data_clump_blocks = 1; 398 sbi->rsrc_clump_blocks = 399 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; 400 if (!sbi->rsrc_clump_blocks) 401 sbi->rsrc_clump_blocks = 1; 402 403 err = -EFBIG; 404 last_fs_block = sbi->total_blocks - 1; 405 last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> 406 PAGE_CACHE_SHIFT; 407 408 if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || 409 (last_fs_page > (pgoff_t)(~0ULL))) { 410 printk(KERN_ERR "hfs: filesystem size too large.\n"); 411 goto out_free_vhdr; 412 } 413 414 /* Set up operations so we can load metadata */ 415 sb->s_op = &hfsplus_sops; 416 sb->s_maxbytes = MAX_LFS_FILESIZE; 417 418 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { 419 printk(KERN_WARNING "hfs: Filesystem was " 420 "not cleanly unmounted, " 421 "running fsck.hfsplus is recommended. " 422 "mounting read-only.\n"); 423 sb->s_flags |= MS_RDONLY; 424 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { 425 /* nothing */ 426 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { 427 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); 428 sb->s_flags |= MS_RDONLY; 429 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && 430 !(sb->s_flags & MS_RDONLY)) { 431 printk(KERN_WARNING "hfs: write access to " 432 "a journaled filesystem is not supported, " 433 "use the force option at your own risk, " 434 "mounting read-only.\n"); 435 sb->s_flags |= MS_RDONLY; 436 } 437 438 err = -EINVAL; 439 440 /* Load metadata objects (B*Trees) */ 441 sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); 442 if (!sbi->ext_tree) { 443 printk(KERN_ERR "hfs: failed to load extents file\n"); 444 goto out_free_vhdr; 445 } 446 sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); 447 if (!sbi->cat_tree) { 448 printk(KERN_ERR "hfs: failed to load catalog file\n"); 449 goto out_close_ext_tree; 450 } 451 452 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); 453 if (IS_ERR(inode)) { 454 printk(KERN_ERR "hfs: failed to load allocation file\n"); 455 err = PTR_ERR(inode); 456 goto out_close_cat_tree; 457 } 458 sbi->alloc_file = inode; 459 460 /* Load the root directory */ 461 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); 462 if (IS_ERR(root)) { 463 printk(KERN_ERR "hfs: failed to load root directory\n"); 464 err = PTR_ERR(root); 465 goto out_put_alloc_file; 466 } 467 468 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; 469 str.name = HFSP_HIDDENDIR_NAME; 470 err = hfs_find_init(sbi->cat_tree, &fd); 471 if (err) 472 goto out_put_root; 473 hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); 474 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { 475 hfs_find_exit(&fd); 476 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) 477 goto out_put_root; 478 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); 479 if (IS_ERR(inode)) { 480 err = PTR_ERR(inode); 481 goto out_put_root; 482 } 483 sbi->hidden_dir = inode; 484 } else 485 hfs_find_exit(&fd); 486 487 if (!(sb->s_flags & MS_RDONLY)) { 488 /* 489 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused 490 * all three are registered with Apple for our use 491 */ 492 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); 493 vhdr->modify_date = hfsp_now2mt(); 494 be32_add_cpu(&vhdr->write_count, 1); 495 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); 496 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); 497 hfsplus_sync_fs(sb, 1); 498 499 if (!sbi->hidden_dir) { 500 mutex_lock(&sbi->vh_mutex); 501 sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); 502 hfsplus_create_cat(sbi->hidden_dir->i_ino, root, &str, 503 sbi->hidden_dir); 504 mutex_unlock(&sbi->vh_mutex); 505 506 hfsplus_mark_inode_dirty(sbi->hidden_dir, 507 HFSPLUS_I_CAT_DIRTY); 508 } 509 } 510 511 sb->s_d_op = &hfsplus_dentry_operations; 512 sb->s_root = d_alloc_root(root); 513 if (!sb->s_root) { 514 err = -ENOMEM; 515 goto out_put_hidden_dir; 516 } 517 518 unload_nls(sbi->nls); 519 sbi->nls = nls; 520 return 0; 521 522 out_put_hidden_dir: 523 iput(sbi->hidden_dir); 524 out_put_root: 525 iput(root); 526 out_put_alloc_file: 527 iput(sbi->alloc_file); 528 out_close_cat_tree: 529 hfs_btree_close(sbi->cat_tree); 530 out_close_ext_tree: 531 hfs_btree_close(sbi->ext_tree); 532 out_free_vhdr: 533 kfree(sbi->s_vhdr_buf); 534 kfree(sbi->s_backup_vhdr_buf); 535 out_unload_nls: 536 unload_nls(sbi->nls); 537 unload_nls(nls); 538 kfree(sbi); 539 out: 540 return err; 541 } 542 543 MODULE_AUTHOR("Brad Boyer"); 544 MODULE_DESCRIPTION("Extended Macintosh Filesystem"); 545 MODULE_LICENSE("GPL"); 546 547 static struct kmem_cache *hfsplus_inode_cachep; 548 549 static struct inode *hfsplus_alloc_inode(struct super_block *sb) 550 { 551 struct hfsplus_inode_info *i; 552 553 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); 554 return i ? &i->vfs_inode : NULL; 555 } 556 557 static void hfsplus_i_callback(struct rcu_head *head) 558 { 559 struct inode *inode = container_of(head, struct inode, i_rcu); 560 561 INIT_LIST_HEAD(&inode->i_dentry); 562 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); 563 } 564 565 static void hfsplus_destroy_inode(struct inode *inode) 566 { 567 call_rcu(&inode->i_rcu, hfsplus_i_callback); 568 } 569 570 #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) 571 572 static struct dentry *hfsplus_mount(struct file_system_type *fs_type, 573 int flags, const char *dev_name, void *data) 574 { 575 return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); 576 } 577 578 static struct file_system_type hfsplus_fs_type = { 579 .owner = THIS_MODULE, 580 .name = "hfsplus", 581 .mount = hfsplus_mount, 582 .kill_sb = kill_block_super, 583 .fs_flags = FS_REQUIRES_DEV, 584 }; 585 586 static void hfsplus_init_once(void *p) 587 { 588 struct hfsplus_inode_info *i = p; 589 590 inode_init_once(&i->vfs_inode); 591 } 592 593 static int __init init_hfsplus_fs(void) 594 { 595 int err; 596 597 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", 598 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, 599 hfsplus_init_once); 600 if (!hfsplus_inode_cachep) 601 return -ENOMEM; 602 err = register_filesystem(&hfsplus_fs_type); 603 if (err) 604 kmem_cache_destroy(hfsplus_inode_cachep); 605 return err; 606 } 607 608 static void __exit exit_hfsplus_fs(void) 609 { 610 unregister_filesystem(&hfsplus_fs_type); 611 kmem_cache_destroy(hfsplus_inode_cachep); 612 } 613 614 module_init(init_hfsplus_fs) 615 module_exit(exit_hfsplus_fs) 616