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/config.h> 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/pagemap.h> 14 #include <linux/fs.h> 15 #include <linux/sched.h> 16 #include <linux/slab.h> 17 #include <linux/vfs.h> 18 #include <linux/nls.h> 19 20 static struct inode *hfsplus_alloc_inode(struct super_block *sb); 21 static void hfsplus_destroy_inode(struct inode *inode); 22 23 #include "hfsplus_fs.h" 24 25 void hfsplus_inode_check(struct super_block *sb) 26 { 27 #if 0 28 u32 cnt = atomic_read(&HFSPLUS_SB(sb).inode_cnt); 29 u32 last_cnt = HFSPLUS_SB(sb).last_inode_cnt; 30 31 if (cnt <= (last_cnt / 2) || 32 cnt >= (last_cnt * 2)) { 33 HFSPLUS_SB(sb).last_inode_cnt = cnt; 34 printk("inode_check: %u,%u,%u\n", cnt, last_cnt, 35 HFSPLUS_SB(sb).cat_tree ? HFSPLUS_SB(sb).cat_tree->node_hash_cnt : 0); 36 } 37 #endif 38 } 39 40 static void hfsplus_read_inode(struct inode *inode) 41 { 42 struct hfs_find_data fd; 43 struct hfsplus_vh *vhdr; 44 int err; 45 46 atomic_inc(&HFSPLUS_SB(inode->i_sb).inode_cnt); 47 hfsplus_inode_check(inode->i_sb); 48 INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); 49 init_MUTEX(&HFSPLUS_I(inode).extents_lock); 50 HFSPLUS_I(inode).flags = 0; 51 HFSPLUS_I(inode).rsrc_inode = NULL; 52 atomic_set(&HFSPLUS_I(inode).opencnt, 0); 53 54 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { 55 read_inode: 56 hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd); 57 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); 58 if (!err) 59 err = hfsplus_cat_read_inode(inode, &fd); 60 hfs_find_exit(&fd); 61 if (err) 62 goto bad_inode; 63 return; 64 } 65 vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; 66 switch(inode->i_ino) { 67 case HFSPLUS_ROOT_CNID: 68 goto read_inode; 69 case HFSPLUS_EXT_CNID: 70 hfsplus_inode_read_fork(inode, &vhdr->ext_file); 71 inode->i_mapping->a_ops = &hfsplus_btree_aops; 72 break; 73 case HFSPLUS_CAT_CNID: 74 hfsplus_inode_read_fork(inode, &vhdr->cat_file); 75 inode->i_mapping->a_ops = &hfsplus_btree_aops; 76 break; 77 case HFSPLUS_ALLOC_CNID: 78 hfsplus_inode_read_fork(inode, &vhdr->alloc_file); 79 inode->i_mapping->a_ops = &hfsplus_aops; 80 break; 81 case HFSPLUS_START_CNID: 82 hfsplus_inode_read_fork(inode, &vhdr->start_file); 83 break; 84 case HFSPLUS_ATTR_CNID: 85 hfsplus_inode_read_fork(inode, &vhdr->attr_file); 86 inode->i_mapping->a_ops = &hfsplus_btree_aops; 87 break; 88 default: 89 goto bad_inode; 90 } 91 92 return; 93 94 bad_inode: 95 make_bad_inode(inode); 96 } 97 98 static int hfsplus_write_inode(struct inode *inode, int unused) 99 { 100 struct hfsplus_vh *vhdr; 101 int ret = 0; 102 103 dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); 104 hfsplus_ext_write_extent(inode); 105 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { 106 return hfsplus_cat_write_inode(inode); 107 } 108 vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; 109 switch (inode->i_ino) { 110 case HFSPLUS_ROOT_CNID: 111 ret = hfsplus_cat_write_inode(inode); 112 break; 113 case HFSPLUS_EXT_CNID: 114 if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) { 115 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; 116 inode->i_sb->s_dirt = 1; 117 } 118 hfsplus_inode_write_fork(inode, &vhdr->ext_file); 119 hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree); 120 break; 121 case HFSPLUS_CAT_CNID: 122 if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) { 123 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; 124 inode->i_sb->s_dirt = 1; 125 } 126 hfsplus_inode_write_fork(inode, &vhdr->cat_file); 127 hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree); 128 break; 129 case HFSPLUS_ALLOC_CNID: 130 if (vhdr->alloc_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->alloc_file); 135 break; 136 case HFSPLUS_START_CNID: 137 if (vhdr->start_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->start_file); 142 break; 143 case HFSPLUS_ATTR_CNID: 144 if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) { 145 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; 146 inode->i_sb->s_dirt = 1; 147 } 148 hfsplus_inode_write_fork(inode, &vhdr->attr_file); 149 hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree); 150 break; 151 } 152 return ret; 153 } 154 155 static void hfsplus_clear_inode(struct inode *inode) 156 { 157 dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino); 158 atomic_dec(&HFSPLUS_SB(inode->i_sb).inode_cnt); 159 if (HFSPLUS_IS_RSRC(inode)) { 160 HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL; 161 iput(HFSPLUS_I(inode).rsrc_inode); 162 } 163 hfsplus_inode_check(inode->i_sb); 164 } 165 166 static void hfsplus_write_super(struct super_block *sb) 167 { 168 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; 169 170 dprint(DBG_SUPER, "hfsplus_write_super\n"); 171 sb->s_dirt = 0; 172 if (sb->s_flags & MS_RDONLY) 173 /* warn? */ 174 return; 175 176 vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks); 177 vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc); 178 vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid); 179 vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count); 180 vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count); 181 182 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); 183 if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) { 184 if (HFSPLUS_SB(sb).sect_count) { 185 struct buffer_head *bh; 186 u32 block, offset; 187 188 block = HFSPLUS_SB(sb).blockoffset; 189 block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9); 190 offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1); 191 printk("backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset, 192 HFSPLUS_SB(sb).sect_count, block, offset); 193 bh = sb_bread(sb, block); 194 if (bh) { 195 vhdr = (struct hfsplus_vh *)(bh->b_data + offset); 196 if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) { 197 memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr)); 198 mark_buffer_dirty(bh); 199 brelse(bh); 200 } else 201 printk("backup not found!\n"); 202 } 203 } 204 HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP; 205 } 206 } 207 208 static void hfsplus_put_super(struct super_block *sb) 209 { 210 dprint(DBG_SUPER, "hfsplus_put_super\n"); 211 if (!sb->s_fs_info) 212 return; 213 if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) { 214 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; 215 216 vhdr->modify_date = hfsp_now2mt(); 217 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); 218 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); 219 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); 220 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); 221 } 222 223 hfs_btree_close(HFSPLUS_SB(sb).cat_tree); 224 hfs_btree_close(HFSPLUS_SB(sb).ext_tree); 225 iput(HFSPLUS_SB(sb).alloc_file); 226 iput(HFSPLUS_SB(sb).hidden_dir); 227 brelse(HFSPLUS_SB(sb).s_vhbh); 228 if (HFSPLUS_SB(sb).nls) 229 unload_nls(HFSPLUS_SB(sb).nls); 230 kfree(sb->s_fs_info); 231 sb->s_fs_info = NULL; 232 } 233 234 static int hfsplus_statfs(struct super_block *sb, struct kstatfs *buf) 235 { 236 buf->f_type = HFSPLUS_SUPER_MAGIC; 237 buf->f_bsize = sb->s_blocksize; 238 buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift; 239 buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift; 240 buf->f_bavail = buf->f_bfree; 241 buf->f_files = 0xFFFFFFFF; 242 buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid; 243 buf->f_namelen = HFSPLUS_MAX_STRLEN; 244 245 return 0; 246 } 247 248 static int hfsplus_remount(struct super_block *sb, int *flags, char *data) 249 { 250 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 251 return 0; 252 if (!(*flags & MS_RDONLY)) { 253 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; 254 struct hfsplus_sb_info sbi; 255 256 memset(&sbi, 0, sizeof(struct hfsplus_sb_info)); 257 sbi.nls = HFSPLUS_SB(sb).nls; 258 if (!hfsplus_parse_options(data, &sbi)) 259 return -EINVAL; 260 261 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { 262 printk("HFS+-fs warning: Filesystem was not cleanly unmounted, " 263 "running fsck.hfsplus is recommended. leaving read-only.\n"); 264 sb->s_flags |= MS_RDONLY; 265 *flags |= MS_RDONLY; 266 } else if (sbi.flags & HFSPLUS_SB_FORCE) { 267 /* nothing */ 268 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { 269 printk("HFS+-fs: Filesystem is marked locked, leaving read-only.\n"); 270 sb->s_flags |= MS_RDONLY; 271 *flags |= MS_RDONLY; 272 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { 273 printk("HFS+-fs: Filesystem is marked journaled, leaving read-only.\n"); 274 sb->s_flags |= MS_RDONLY; 275 *flags |= MS_RDONLY; 276 } 277 } 278 return 0; 279 } 280 281 static struct super_operations hfsplus_sops = { 282 .alloc_inode = hfsplus_alloc_inode, 283 .destroy_inode = hfsplus_destroy_inode, 284 .read_inode = hfsplus_read_inode, 285 .write_inode = hfsplus_write_inode, 286 .clear_inode = hfsplus_clear_inode, 287 .put_super = hfsplus_put_super, 288 .write_super = hfsplus_write_super, 289 .statfs = hfsplus_statfs, 290 .remount_fs = hfsplus_remount, 291 .show_options = hfsplus_show_options, 292 }; 293 294 static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) 295 { 296 struct hfsplus_vh *vhdr; 297 struct hfsplus_sb_info *sbi; 298 hfsplus_cat_entry entry; 299 struct hfs_find_data fd; 300 struct inode *root; 301 struct qstr str; 302 struct nls_table *nls = NULL; 303 int err = -EINVAL; 304 305 sbi = kmalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL); 306 if (!sbi) 307 return -ENOMEM; 308 309 memset(sbi, 0, sizeof(HFSPLUS_SB(sb))); 310 sb->s_fs_info = sbi; 311 INIT_HLIST_HEAD(&sbi->rsrc_inodes); 312 hfsplus_fill_defaults(sbi); 313 if (!hfsplus_parse_options(data, sbi)) { 314 if (!silent) 315 printk("HFS+-fs: unable to parse mount options\n"); 316 err = -EINVAL; 317 goto cleanup; 318 } 319 320 /* temporarily use utf8 to correctly find the hidden dir below */ 321 nls = sbi->nls; 322 sbi->nls = load_nls("utf8"); 323 if (!sbi->nls) { 324 printk("HFS+: unable to load nls for utf8\n"); 325 err = -EINVAL; 326 goto cleanup; 327 } 328 329 /* Grab the volume header */ 330 if (hfsplus_read_wrapper(sb)) { 331 if (!silent) 332 printk("HFS+-fs: unable to find HFS+ superblock\n"); 333 err = -EINVAL; 334 goto cleanup; 335 } 336 vhdr = HFSPLUS_SB(sb).s_vhdr; 337 338 /* Copy parts of the volume header into the superblock */ 339 sb->s_magic = be16_to_cpu(vhdr->signature); 340 if (be16_to_cpu(vhdr->version) != HFSPLUS_CURRENT_VERSION) { 341 if (!silent) 342 printk("HFS+-fs: wrong filesystem version\n"); 343 goto cleanup; 344 } 345 HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks); 346 HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks); 347 HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc); 348 HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid); 349 HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count); 350 HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count); 351 HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; 352 if (!HFSPLUS_SB(sb).data_clump_blocks) 353 HFSPLUS_SB(sb).data_clump_blocks = 1; 354 HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; 355 if (!HFSPLUS_SB(sb).rsrc_clump_blocks) 356 HFSPLUS_SB(sb).rsrc_clump_blocks = 1; 357 358 /* Set up operations so we can load metadata */ 359 sb->s_op = &hfsplus_sops; 360 sb->s_maxbytes = MAX_LFS_FILESIZE; 361 362 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { 363 if (!silent) 364 printk("HFS+-fs warning: Filesystem was not cleanly unmounted, " 365 "running fsck.hfsplus is recommended. mounting read-only.\n"); 366 sb->s_flags |= MS_RDONLY; 367 } else if (sbi->flags & HFSPLUS_SB_FORCE) { 368 /* nothing */ 369 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { 370 if (!silent) 371 printk("HFS+-fs: Filesystem is marked locked, mounting read-only.\n"); 372 sb->s_flags |= MS_RDONLY; 373 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { 374 if (!silent) 375 printk("HFS+-fs: write access to a jounaled filesystem is not supported, " 376 "use the force option at your own risk, mounting read-only.\n"); 377 sb->s_flags |= MS_RDONLY; 378 } 379 sbi->flags &= ~HFSPLUS_SB_FORCE; 380 381 /* Load metadata objects (B*Trees) */ 382 HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); 383 if (!HFSPLUS_SB(sb).ext_tree) { 384 if (!silent) 385 printk("HFS+-fs: failed to load extents file\n"); 386 goto cleanup; 387 } 388 HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); 389 if (!HFSPLUS_SB(sb).cat_tree) { 390 if (!silent) 391 printk("HFS+-fs: failed to load catalog file\n"); 392 goto cleanup; 393 } 394 395 HFSPLUS_SB(sb).alloc_file = iget(sb, HFSPLUS_ALLOC_CNID); 396 if (!HFSPLUS_SB(sb).alloc_file) { 397 if (!silent) 398 printk("HFS+-fs: failed to load allocation file\n"); 399 goto cleanup; 400 } 401 402 /* Load the root directory */ 403 root = iget(sb, HFSPLUS_ROOT_CNID); 404 sb->s_root = d_alloc_root(root); 405 if (!sb->s_root) { 406 if (!silent) 407 printk("HFS+-fs: failed to load root directory\n"); 408 iput(root); 409 goto cleanup; 410 } 411 412 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; 413 str.name = HFSP_HIDDENDIR_NAME; 414 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); 415 hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); 416 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { 417 hfs_find_exit(&fd); 418 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) 419 goto cleanup; 420 HFSPLUS_SB(sb).hidden_dir = iget(sb, be32_to_cpu(entry.folder.id)); 421 if (!HFSPLUS_SB(sb).hidden_dir) 422 goto cleanup; 423 } else 424 hfs_find_exit(&fd); 425 426 if (sb->s_flags & MS_RDONLY) 427 goto out; 428 429 /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused 430 * all three are registered with Apple for our use 431 */ 432 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); 433 vhdr->modify_date = hfsp_now2mt(); 434 vhdr->write_count = cpu_to_be32(be32_to_cpu(vhdr->write_count) + 1); 435 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); 436 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); 437 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); 438 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); 439 440 if (!HFSPLUS_SB(sb).hidden_dir) { 441 printk("HFS+: create hidden dir...\n"); 442 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR); 443 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode, 444 &str, HFSPLUS_SB(sb).hidden_dir); 445 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir); 446 } 447 out: 448 unload_nls(sbi->nls); 449 sbi->nls = nls; 450 return 0; 451 452 cleanup: 453 hfsplus_put_super(sb); 454 if (nls) 455 unload_nls(nls); 456 return err; 457 } 458 459 MODULE_AUTHOR("Brad Boyer"); 460 MODULE_DESCRIPTION("Extended Macintosh Filesystem"); 461 MODULE_LICENSE("GPL"); 462 463 static kmem_cache_t *hfsplus_inode_cachep; 464 465 static struct inode *hfsplus_alloc_inode(struct super_block *sb) 466 { 467 struct hfsplus_inode_info *i; 468 469 i = kmem_cache_alloc(hfsplus_inode_cachep, SLAB_KERNEL); 470 return i ? &i->vfs_inode : NULL; 471 } 472 473 static void hfsplus_destroy_inode(struct inode *inode) 474 { 475 kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode)); 476 } 477 478 #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) 479 480 static struct super_block *hfsplus_get_sb(struct file_system_type *fs_type, 481 int flags, const char *dev_name, void *data) 482 { 483 return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); 484 } 485 486 static struct file_system_type hfsplus_fs_type = { 487 .owner = THIS_MODULE, 488 .name = "hfsplus", 489 .get_sb = hfsplus_get_sb, 490 .kill_sb = kill_block_super, 491 .fs_flags = FS_REQUIRES_DEV, 492 }; 493 494 static void hfsplus_init_once(void *p, kmem_cache_t *cachep, unsigned long flags) 495 { 496 struct hfsplus_inode_info *i = p; 497 498 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR) 499 inode_init_once(&i->vfs_inode); 500 } 501 502 static int __init init_hfsplus_fs(void) 503 { 504 int err; 505 506 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", 507 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, 508 hfsplus_init_once, NULL); 509 if (!hfsplus_inode_cachep) 510 return -ENOMEM; 511 err = register_filesystem(&hfsplus_fs_type); 512 if (err) 513 kmem_cache_destroy(hfsplus_inode_cachep); 514 return err; 515 } 516 517 static void __exit exit_hfsplus_fs(void) 518 { 519 unregister_filesystem(&hfsplus_fs_type); 520 if (kmem_cache_destroy(hfsplus_inode_cachep)) 521 printk(KERN_INFO "hfsplus_inode_cache: not all structures were freed\n"); 522 } 523 524 module_init(init_hfsplus_fs) 525 module_exit(exit_hfsplus_fs) 526