fs/hfsplus/super.c

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