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(KERN_DEBUG "hfs: 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(KERN_WARNING "hfs: 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(KERN_WARNING "hfs: 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(KERN_WARNING "hfs: 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(KERN_WARNING "hfs: 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                 printk(KERN_ERR "hfs: unable to parse mount options\n");
 296                 err = -EINVAL;
 297                 goto cleanup;
 298         }
 299
 300         /* temporarily use utf8 to correctly find the hidden dir below */
 301         nls = sbi->nls;
 302         sbi->nls = load_nls("utf8");
 303         if (!sbi->nls) {
 304                 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
 305                 err = -EINVAL;
 306                 goto cleanup;
 307         }
 308
 309         /* Grab the volume header */
 310         if (hfsplus_read_wrapper(sb)) {
 311                 if (!silent)
 312                         printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
 313                 err = -EINVAL;
 314                 goto cleanup;
 315         }
 316         vhdr = HFSPLUS_SB(sb).s_vhdr;
 317
 318         /* Copy parts of the volume header into the superblock */
 319         sb->s_magic = HFSPLUS_VOLHEAD_SIG;
 320         if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
 321             be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
 322                 printk(KERN_ERR "hfs: wrong filesystem version\n");
 323                 goto cleanup;
 324         }
 325         HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks);
 326         HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks);
 327         HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc);
 328         HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid);
 329         HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count);
 330         HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count);
 331         HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
 332         if (!HFSPLUS_SB(sb).data_clump_blocks)
 333                 HFSPLUS_SB(sb).data_clump_blocks = 1;
 334         HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
 335         if (!HFSPLUS_SB(sb).rsrc_clump_blocks)
 336                 HFSPLUS_SB(sb).rsrc_clump_blocks = 1;
 337
 338         /* Set up operations so we can load metadata */
 339         sb->s_op = &hfsplus_sops;
 340         sb->s_maxbytes = MAX_LFS_FILESIZE;
 341
 342         if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
 343                 printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
 344                        "running fsck.hfsplus is recommended.  mounting read-only.\n");
 345                 sb->s_flags |= MS_RDONLY;
 346         } else if (sbi->flags & HFSPLUS_SB_FORCE) {
 347                 /* nothing */
 348         } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
 349                 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
 350                 sb->s_flags |= MS_RDONLY;
 351         } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
 352                 printk(KERN_WARNING "hfs: write access to a jounaled filesystem is not supported, "
 353                        "use the force option at your own risk, mounting read-only.\n");
 354                 sb->s_flags |= MS_RDONLY;
 355         }
 356         sbi->flags &= ~HFSPLUS_SB_FORCE;
 357
 358         /* Load metadata objects (B*Trees) */
 359         HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
 360         if (!HFSPLUS_SB(sb).ext_tree) {
 361                 printk(KERN_ERR "hfs: failed to load extents file\n");
 362                 goto cleanup;
 363         }
 364         HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
 365         if (!HFSPLUS_SB(sb).cat_tree) {
 366                 printk(KERN_ERR "hfs: failed to load catalog file\n");
 367                 goto cleanup;
 368         }
 369
 370         HFSPLUS_SB(sb).alloc_file = iget(sb, HFSPLUS_ALLOC_CNID);
 371         if (!HFSPLUS_SB(sb).alloc_file) {
 372                 printk(KERN_ERR "hfs: failed to load allocation file\n");
 373                 goto cleanup;
 374         }
 375
 376         /* Load the root directory */
 377         root = iget(sb, HFSPLUS_ROOT_CNID);
 378         sb->s_root = d_alloc_root(root);
 379         if (!sb->s_root) {
 380                 printk(KERN_ERR "hfs: failed to load root directory\n");
 381                 iput(root);
 382                 goto cleanup;
 383         }
 384
 385         str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
 386         str.name = HFSP_HIDDENDIR_NAME;
 387         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
 388         hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
 389         if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
 390                 hfs_find_exit(&fd);
 391                 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
 392                         goto cleanup;
 393                 HFSPLUS_SB(sb).hidden_dir = iget(sb, be32_to_cpu(entry.folder.id));
 394                 if (!HFSPLUS_SB(sb).hidden_dir)
 395                         goto cleanup;
 396         } else
 397                 hfs_find_exit(&fd);
 398
 399         if (sb->s_flags & MS_RDONLY)
 400                 goto out;
 401
 402         /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
 403          * all three are registered with Apple for our use
 404          */
 405         vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
 406         vhdr->modify_date = hfsp_now2mt();
 407         vhdr->write_count = cpu_to_be32(be32_to_cpu(vhdr->write_count) + 1);
 408         vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
 409         vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
 410         mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
 411         sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
 412
 413         if (!HFSPLUS_SB(sb).hidden_dir) {
 414                 printk(KERN_DEBUG "hfs: create hidden dir...\n");
 415                 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
 416                 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
 417                                    &str, HFSPLUS_SB(sb).hidden_dir);
 418                 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
 419         }
 420 out:
 421         unload_nls(sbi->nls);
 422         sbi->nls = nls;
 423         return 0;
 424
 425 cleanup:
 426         hfsplus_put_super(sb);
 427         if (nls)
 428                 unload_nls(nls);
 429         return err;
 430 }
 431
 432 MODULE_AUTHOR("Brad Boyer");
 433 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
 434 MODULE_LICENSE("GPL");
 435
 436 static kmem_cache_t *hfsplus_inode_cachep;
 437
 438 static struct inode *hfsplus_alloc_inode(struct super_block *sb)
 439 {
 440         struct hfsplus_inode_info *i;
 441
 442         i = kmem_cache_alloc(hfsplus_inode_cachep, SLAB_KERNEL);
 443         return i ? &i->vfs_inode : NULL;
 444 }
 445
 446 static void hfsplus_destroy_inode(struct inode *inode)
 447 {
 448         kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
 449 }
 450
 451 #define HFSPLUS_INODE_SIZE      sizeof(struct hfsplus_inode_info)
 452
 453 static struct super_block *hfsplus_get_sb(struct file_system_type *fs_type,
 454                                           int flags, const char *dev_name, void *data)
 455 {
 456         return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super);
 457 }
 458
 459 static struct file_system_type hfsplus_fs_type = {
 460         .owner          = THIS_MODULE,
 461         .name           = "hfsplus",
 462         .get_sb         = hfsplus_get_sb,
 463         .kill_sb        = kill_block_super,
 464         .fs_flags       = FS_REQUIRES_DEV,
 465 };
 466
 467 static void hfsplus_init_once(void *p, kmem_cache_t *cachep, unsigned long flags)
 468 {
 469         struct hfsplus_inode_info *i = p;
 470
 471         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR)
 472                 inode_init_once(&i->vfs_inode);
 473 }
 474
 475 static int __init init_hfsplus_fs(void)
 476 {
 477         int err;
 478
 479         hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
 480                 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
 481                 hfsplus_init_once, NULL);
 482         if (!hfsplus_inode_cachep)
 483                 return -ENOMEM;
 484         err = register_filesystem(&hfsplus_fs_type);
 485         if (err)
 486                 kmem_cache_destroy(hfsplus_inode_cachep);
 487         return err;
 488 }
 489
 490 static void __exit exit_hfsplus_fs(void)
 491 {
 492         unregister_filesystem(&hfsplus_fs_type);
 493         if (kmem_cache_destroy(hfsplus_inode_cachep))
 494                 printk(KERN_ERR "hfsplus_inode_cache: not all structures were freed\n");
 495 }
 496
 497 module_init(init_hfsplus_fs)
 498 module_exit(exit_hfsplus_fs)