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/module.h>
  11 #include <linux/init.h>
  12 #include <linux/pagemap.h>
  13 #include <linux/fs.h>
  14 #include <linux/sched.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 void hfsplus_read_inode(struct inode *inode)
  25 {
  26         struct hfs_find_data fd;
  27         struct hfsplus_vh *vhdr;
  28         int err;
  29
  30         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
  31         init_MUTEX(&HFSPLUS_I(inode).extents_lock);
  32         HFSPLUS_I(inode).flags = 0;
  33         HFSPLUS_I(inode).rsrc_inode = NULL;
  34         atomic_set(&HFSPLUS_I(inode).opencnt, 0);
  35
  36         if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
  37         read_inode:
  38                 hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd);
  39                 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
  40                 if (!err)
  41                         err = hfsplus_cat_read_inode(inode, &fd);
  42                 hfs_find_exit(&fd);
  43                 if (err)
  44                         goto bad_inode;
  45                 return;
  46         }
  47         vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
  48         switch(inode->i_ino) {
  49         case HFSPLUS_ROOT_CNID:
  50                 goto read_inode;
  51         case HFSPLUS_EXT_CNID:
  52                 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
  53                 inode->i_mapping->a_ops = &hfsplus_btree_aops;
  54                 break;
  55         case HFSPLUS_CAT_CNID:
  56                 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
  57                 inode->i_mapping->a_ops = &hfsplus_btree_aops;
  58                 break;
  59         case HFSPLUS_ALLOC_CNID:
  60                 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
  61                 inode->i_mapping->a_ops = &hfsplus_aops;
  62                 break;
  63         case HFSPLUS_START_CNID:
  64                 hfsplus_inode_read_fork(inode, &vhdr->start_file);
  65                 break;
  66         case HFSPLUS_ATTR_CNID:
  67                 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
  68                 inode->i_mapping->a_ops = &hfsplus_btree_aops;
  69                 break;
  70         default:
  71                 goto bad_inode;
  72         }
  73
  74         return;
  75
  76  bad_inode:
  77         make_bad_inode(inode);
  78 }
  79
  80 static int hfsplus_write_inode(struct inode *inode, int unused)
  81 {
  82         struct hfsplus_vh *vhdr;
  83         int ret = 0;
  84
  85         dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
  86         hfsplus_ext_write_extent(inode);
  87         if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
  88                 return hfsplus_cat_write_inode(inode);
  89         }
  90         vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
  91         switch (inode->i_ino) {
  92         case HFSPLUS_ROOT_CNID:
  93                 ret = hfsplus_cat_write_inode(inode);
  94                 break;
  95         case HFSPLUS_EXT_CNID:
  96                 if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) {
  97                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
  98                         inode->i_sb->s_dirt = 1;
  99                 }
 100                 hfsplus_inode_write_fork(inode, &vhdr->ext_file);
 101                 hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree);
 102                 break;
 103         case HFSPLUS_CAT_CNID:
 104                 if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) {
 105                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
 106                         inode->i_sb->s_dirt = 1;
 107                 }
 108                 hfsplus_inode_write_fork(inode, &vhdr->cat_file);
 109                 hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree);
 110                 break;
 111         case HFSPLUS_ALLOC_CNID:
 112                 if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) {
 113                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
 114                         inode->i_sb->s_dirt = 1;
 115                 }
 116                 hfsplus_inode_write_fork(inode, &vhdr->alloc_file);
 117                 break;
 118         case HFSPLUS_START_CNID:
 119                 if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) {
 120                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
 121                         inode->i_sb->s_dirt = 1;
 122                 }
 123                 hfsplus_inode_write_fork(inode, &vhdr->start_file);
 124                 break;
 125         case HFSPLUS_ATTR_CNID:
 126                 if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) {
 127                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
 128                         inode->i_sb->s_dirt = 1;
 129                 }
 130                 hfsplus_inode_write_fork(inode, &vhdr->attr_file);
 131                 hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree);
 132                 break;
 133         }
 134         return ret;
 135 }
 136
 137 static void hfsplus_clear_inode(struct inode *inode)
 138 {
 139         dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino);
 140         if (HFSPLUS_IS_RSRC(inode)) {
 141                 HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL;
 142                 iput(HFSPLUS_I(inode).rsrc_inode);
 143         }
 144 }
 145
 146 static void hfsplus_write_super(struct super_block *sb)
 147 {
 148         struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
 149
 150         dprint(DBG_SUPER, "hfsplus_write_super\n");
 151         sb->s_dirt = 0;
 152         if (sb->s_flags & MS_RDONLY)
 153                 /* warn? */
 154                 return;
 155
 156         vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
 157         vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
 158         vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid);
 159         vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count);
 160         vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count);
 161
 162         mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
 163         if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) {
 164                 if (HFSPLUS_SB(sb).sect_count) {
 165                         struct buffer_head *bh;
 166                         u32 block, offset;
 167
 168                         block = HFSPLUS_SB(sb).blockoffset;
 169                         block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9);
 170                         offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1);
 171                         printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset,
 172                                 HFSPLUS_SB(sb).sect_count, block, offset);
 173                         bh = sb_bread(sb, block);
 174                         if (bh) {
 175                                 vhdr = (struct hfsplus_vh *)(bh->b_data + offset);
 176                                 if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) {
 177                                         memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr));
 178                                         mark_buffer_dirty(bh);
 179                                         brelse(bh);
 180                                 } else
 181                                         printk(KERN_WARNING "hfs: backup not found!\n");
 182                         }
 183                 }
 184                 HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
 185         }
 186 }
 187
 188 static void hfsplus_put_super(struct super_block *sb)
 189 {
 190         dprint(DBG_SUPER, "hfsplus_put_super\n");
 191         if (!sb->s_fs_info)
 192                 return;
 193         if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
 194                 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
 195
 196                 vhdr->modify_date = hfsp_now2mt();
 197                 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
 198                 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
 199                 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
 200                 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
 201         }
 202
 203         hfs_btree_close(HFSPLUS_SB(sb).cat_tree);
 204         hfs_btree_close(HFSPLUS_SB(sb).ext_tree);
 205         iput(HFSPLUS_SB(sb).alloc_file);
 206         iput(HFSPLUS_SB(sb).hidden_dir);
 207         brelse(HFSPLUS_SB(sb).s_vhbh);
 208         if (HFSPLUS_SB(sb).nls)
 209                 unload_nls(HFSPLUS_SB(sb).nls);
 210         kfree(sb->s_fs_info);
 211         sb->s_fs_info = NULL;
 212 }
 213
 214 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
 215 {
 216         struct super_block *sb = dentry->d_sb;
 217
 218         buf->f_type = HFSPLUS_SUPER_MAGIC;
 219         buf->f_bsize = sb->s_blocksize;
 220         buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
 221         buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift;
 222         buf->f_bavail = buf->f_bfree;
 223         buf->f_files = 0xFFFFFFFF;
 224         buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid;
 225         buf->f_namelen = HFSPLUS_MAX_STRLEN;
 226
 227         return 0;
 228 }
 229
 230 static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
 231 {
 232         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
 233                 return 0;
 234         if (!(*flags & MS_RDONLY)) {
 235                 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
 236                 struct hfsplus_sb_info sbi;
 237
 238                 memset(&sbi, 0, sizeof(struct hfsplus_sb_info));
 239                 sbi.nls = HFSPLUS_SB(sb).nls;
 240                 if (!hfsplus_parse_options(data, &sbi))
 241                         return -EINVAL;
 242
 243                 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
 244                         printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
 245                                "running fsck.hfsplus is recommended.  leaving read-only.\n");
 246                         sb->s_flags |= MS_RDONLY;
 247                         *flags |= MS_RDONLY;
 248                 } else if (sbi.flags & HFSPLUS_SB_FORCE) {
 249                         /* nothing */
 250                 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
 251                         printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
 252                         sb->s_flags |= MS_RDONLY;
 253                         *flags |= MS_RDONLY;
 254                 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
 255                         printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
 256                         sb->s_flags |= MS_RDONLY;
 257                         *flags |= MS_RDONLY;
 258                 }
 259         }
 260         return 0;
 261 }
 262
 263 static struct super_operations hfsplus_sops = {
 264         .alloc_inode    = hfsplus_alloc_inode,
 265         .destroy_inode  = hfsplus_destroy_inode,
 266         .read_inode     = hfsplus_read_inode,
 267         .write_inode    = hfsplus_write_inode,
 268         .clear_inode    = hfsplus_clear_inode,
 269         .put_super      = hfsplus_put_super,
 270         .write_super    = hfsplus_write_super,
 271         .statfs         = hfsplus_statfs,
 272         .remount_fs     = hfsplus_remount,
 273         .show_options   = hfsplus_show_options,
 274 };
 275
 276 static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 277 {
 278         struct hfsplus_vh *vhdr;
 279         struct hfsplus_sb_info *sbi;
 280         hfsplus_cat_entry entry;
 281         struct hfs_find_data fd;
 282         struct inode *root;
 283         struct qstr str;
 284         struct nls_table *nls = NULL;
 285         int err = -EINVAL;
 286
 287         sbi = kmalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL);
 288         if (!sbi)
 289                 return -ENOMEM;
 290
 291         memset(sbi, 0, sizeof(HFSPLUS_SB(sb)));
 292         sb->s_fs_info = sbi;
 293         INIT_HLIST_HEAD(&sbi->rsrc_inodes);
 294         hfsplus_fill_defaults(sbi);
 295         if (!hfsplus_parse_options(data, sbi)) {
 296                 printk(KERN_ERR "hfs: 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(KERN_ERR "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(KERN_WARNING "hfs: 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 = HFSPLUS_VOLHEAD_SIG;
 321         if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
 322             be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
 323                 printk(KERN_ERR "hfs: 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                 printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
 345                        "running fsck.hfsplus is recommended.  mounting read-only.\n");
 346                 sb->s_flags |= MS_RDONLY;
 347         } else if (sbi->flags & HFSPLUS_SB_FORCE) {
 348                 /* nothing */
 349         } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
 350                 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
 351                 sb->s_flags |= MS_RDONLY;
 352         } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
 353                 printk(KERN_WARNING "hfs: write access to a jounaled filesystem is not supported, "
 354                        "use the force option at your own risk, mounting read-only.\n");
 355                 sb->s_flags |= MS_RDONLY;
 356         }
 357         sbi->flags &= ~HFSPLUS_SB_FORCE;
 358
 359         /* Load metadata objects (B*Trees) */
 360         HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
 361         if (!HFSPLUS_SB(sb).ext_tree) {
 362                 printk(KERN_ERR "hfs: failed to load extents file\n");
 363                 goto cleanup;
 364         }
 365         HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
 366         if (!HFSPLUS_SB(sb).cat_tree) {
 367                 printk(KERN_ERR "hfs: failed to load catalog file\n");
 368                 goto cleanup;
 369         }
 370
 371         HFSPLUS_SB(sb).alloc_file = iget(sb, HFSPLUS_ALLOC_CNID);
 372         if (!HFSPLUS_SB(sb).alloc_file) {
 373                 printk(KERN_ERR "hfs: failed to load allocation file\n");
 374                 goto cleanup;
 375         }
 376
 377         /* Load the root directory */
 378         root = iget(sb, HFSPLUS_ROOT_CNID);
 379         sb->s_root = d_alloc_root(root);
 380         if (!sb->s_root) {
 381                 printk(KERN_ERR "hfs: failed to load root directory\n");
 382                 iput(root);
 383                 goto cleanup;
 384         }
 385
 386         str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
 387         str.name = HFSP_HIDDENDIR_NAME;
 388         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
 389         hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
 390         if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
 391                 hfs_find_exit(&fd);
 392                 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
 393                         goto cleanup;
 394                 HFSPLUS_SB(sb).hidden_dir = iget(sb, be32_to_cpu(entry.folder.id));
 395                 if (!HFSPLUS_SB(sb).hidden_dir)
 396                         goto cleanup;
 397         } else
 398                 hfs_find_exit(&fd);
 399
 400         if (sb->s_flags & MS_RDONLY)
 401                 goto out;
 402
 403         /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
 404          * all three are registered with Apple for our use
 405          */
 406         vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
 407         vhdr->modify_date = hfsp_now2mt();
 408         vhdr->write_count = cpu_to_be32(be32_to_cpu(vhdr->write_count) + 1);
 409         vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
 410         vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
 411         mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
 412         sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
 413
 414         if (!HFSPLUS_SB(sb).hidden_dir) {
 415                 printk(KERN_DEBUG "hfs: create hidden dir...\n");
 416                 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
 417                 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
 418                                    &str, HFSPLUS_SB(sb).hidden_dir);
 419                 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
 420         }
 421 out:
 422         unload_nls(sbi->nls);
 423         sbi->nls = nls;
 424         return 0;
 425
 426 cleanup:
 427         hfsplus_put_super(sb);
 428         if (nls)
 429                 unload_nls(nls);
 430         return err;
 431 }
 432
 433 MODULE_AUTHOR("Brad Boyer");
 434 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
 435 MODULE_LICENSE("GPL");
 436
 437 static kmem_cache_t *hfsplus_inode_cachep;
 438
 439 static struct inode *hfsplus_alloc_inode(struct super_block *sb)
 440 {
 441         struct hfsplus_inode_info *i;
 442
 443         i = kmem_cache_alloc(hfsplus_inode_cachep, SLAB_KERNEL);
 444         return i ? &i->vfs_inode : NULL;
 445 }
 446
 447 static void hfsplus_destroy_inode(struct inode *inode)
 448 {
 449         kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
 450 }
 451
 452 #define HFSPLUS_INODE_SIZE      sizeof(struct hfsplus_inode_info)
 453
 454 static int hfsplus_get_sb(struct file_system_type *fs_type,
 455                           int flags, const char *dev_name, void *data,
 456                           struct vfsmount *mnt)
 457 {
 458         return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
 459                            mnt);
 460 }
 461
 462 static struct file_system_type hfsplus_fs_type = {
 463         .owner          = THIS_MODULE,
 464         .name           = "hfsplus",
 465         .get_sb         = hfsplus_get_sb,
 466         .kill_sb        = kill_block_super,
 467         .fs_flags       = FS_REQUIRES_DEV,
 468 };
 469
 470 static void hfsplus_init_once(void *p, kmem_cache_t *cachep, unsigned long flags)
 471 {
 472         struct hfsplus_inode_info *i = p;
 473
 474         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR)
 475                 inode_init_once(&i->vfs_inode);
 476 }
 477
 478 static int __init init_hfsplus_fs(void)
 479 {
 480         int err;
 481
 482         hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
 483                 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
 484                 hfsplus_init_once, NULL);
 485         if (!hfsplus_inode_cachep)
 486                 return -ENOMEM;
 487         err = register_filesystem(&hfsplus_fs_type);
 488         if (err)
 489                 kmem_cache_destroy(hfsplus_inode_cachep);
 490         return err;
 491 }
 492
 493 static void __exit exit_hfsplus_fs(void)
 494 {
 495         unregister_filesystem(&hfsplus_fs_type);
 496         if (kmem_cache_destroy(hfsplus_inode_cachep))
 497                 printk(KERN_ERR "hfsplus_inode_cache: not all structures were freed\n");
 498 }
 499
 500 module_init(init_hfsplus_fs)
 501 module_exit(exit_hfsplus_fs)