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