git.oblomov.eu Git - linux-2.6/blob - 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 dentry *dentry, struct kstatfs *buf)
 216 {
 217         struct super_block *sb = dentry->d_sb;
 218
 219         buf->f_type = HFSPLUS_SUPER_MAGIC;
 220         buf->f_bsize = sb->s_blocksize;
 221         buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
 222         buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift;
 223         buf->f_bavail = buf->f_bfree;
 224         buf->f_files = 0xFFFFFFFF;
 225         buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid;
 226         buf->f_namelen = HFSPLUS_MAX_STRLEN;
 227
 228         return 0;
 229 }
 230
 231 static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
 232 {
 233         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
 234                 return 0;
 235         if (!(*flags & MS_RDONLY)) {
 236                 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
 237                 struct hfsplus_sb_info sbi;
 238
 239                 memset(&sbi, 0, sizeof(struct hfsplus_sb_info));
 240                 sbi.nls = HFSPLUS_SB(sb).nls;
 241                 if (!hfsplus_parse_options(data, &sbi))
 242                         return -EINVAL;
 243
 244                 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
 245                         printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
 246                                "running fsck.hfsplus is recommended.  leaving read-only.\n");
 247                         sb->s_flags |= MS_RDONLY;
 248                         *flags |= MS_RDONLY;
 249                 } else if (sbi.flags & HFSPLUS_SB_FORCE) {
 250                         /* nothing */
 251                 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
 252                         printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
 253                         sb->s_flags |= MS_RDONLY;
 254                         *flags |= MS_RDONLY;
 255                 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
 256                         printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
 257                         sb->s_flags |= MS_RDONLY;
 258                         *flags |= MS_RDONLY;
 259                 }
 260         }
 261         return 0;
 262 }
 263
 264 static struct super_operations hfsplus_sops = {
 265         .alloc_inode    = hfsplus_alloc_inode,
 266         .destroy_inode  = hfsplus_destroy_inode,
 267         .read_inode     = hfsplus_read_inode,
 268         .write_inode    = hfsplus_write_inode,
 269         .clear_inode    = hfsplus_clear_inode,
 270         .put_super      = hfsplus_put_super,
 271         .write_super    = hfsplus_write_super,
 272         .statfs         = hfsplus_statfs,
 273         .remount_fs     = hfsplus_remount,
 274         .show_options   = hfsplus_show_options,
 275 };
 276
 277 static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 278 {
 279         struct hfsplus_vh *vhdr;
 280         struct hfsplus_sb_info *sbi;
 281         hfsplus_cat_entry entry;
 282         struct hfs_find_data fd;
 283         struct inode *root;
 284         struct qstr str;
 285         struct nls_table *nls = NULL;
 286         int err = -EINVAL;
 287
 288         sbi = kmalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL);
 289         if (!sbi)
 290                 return -ENOMEM;
 291
 292         memset(sbi, 0, sizeof(HFSPLUS_SB(sb)));
 293         sb->s_fs_info = sbi;
 294         INIT_HLIST_HEAD(&sbi->rsrc_inodes);
 295         hfsplus_fill_defaults(sbi);
 296         if (!hfsplus_parse_options(data, sbi)) {
 297                 printk(KERN_ERR "hfs: unable to parse mount options\n");
 298                 err = -EINVAL;
 299                 goto cleanup;
 300         }
 301
 302         /* temporarily use utf8 to correctly find the hidden dir below */
 303         nls = sbi->nls;
 304         sbi->nls = load_nls("utf8");
 305         if (!sbi->nls) {
 306                 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
 307                 err = -EINVAL;
 308                 goto cleanup;
 309         }
 310
 311         /* Grab the volume header */
 312         if (hfsplus_read_wrapper(sb)) {
 313                 if (!silent)
 314                         printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
 315                 err = -EINVAL;
 316                 goto cleanup;
 317         }
 318         vhdr = HFSPLUS_SB(sb).s_vhdr;
 319
 320         /* Copy parts of the volume header into the superblock */
 321         sb->s_magic = HFSPLUS_VOLHEAD_SIG;
 322         if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
 323             be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
 324                 printk(KERN_ERR "hfs: wrong filesystem version\n");
 325                 goto cleanup;
 326         }
 327         HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks);
 328         HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks);
 329         HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc);
 330         HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid);
 331         HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count);
 332         HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count);
 333         HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
 334         if (!HFSPLUS_SB(sb).data_clump_blocks)
 335                 HFSPLUS_SB(sb).data_clump_blocks = 1;
 336         HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
 337         if (!HFSPLUS_SB(sb).rsrc_clump_blocks)
 338                 HFSPLUS_SB(sb).rsrc_clump_blocks = 1;
 339
 340         /* Set up operations so we can load metadata */
 341         sb->s_op = &hfsplus_sops;
 342         sb->s_maxbytes = MAX_LFS_FILESIZE;
 343
 344         if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
 345                 printk(KERN_WARNING "hfs: 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                 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
 352                 sb->s_flags |= MS_RDONLY;
 353         } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
 354                 printk(KERN_WARNING "hfs: write access to a jounaled filesystem is not supported, "
 355                        "use the force option at your own risk, mounting read-only.\n");
 356                 sb->s_flags |= MS_RDONLY;
 357         }
 358         sbi->flags &= ~HFSPLUS_SB_FORCE;
 359
 360         /* Load metadata objects (B*Trees) */
 361         HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
 362         if (!HFSPLUS_SB(sb).ext_tree) {
 363                 printk(KERN_ERR "hfs: failed to load extents file\n");
 364                 goto cleanup;
 365         }
 366         HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
 367         if (!HFSPLUS_SB(sb).cat_tree) {
 368                 printk(KERN_ERR "hfs: failed to load catalog file\n");
 369                 goto cleanup;
 370         }
 371
 372         HFSPLUS_SB(sb).alloc_file = iget(sb, HFSPLUS_ALLOC_CNID);
 373         if (!HFSPLUS_SB(sb).alloc_file) {
 374                 printk(KERN_ERR "hfs: failed to load allocation file\n");
 375                 goto cleanup;
 376         }
 377
 378         /* Load the root directory */
 379         root = iget(sb, HFSPLUS_ROOT_CNID);
 380         sb->s_root = d_alloc_root(root);
 381         if (!sb->s_root) {
 382                 printk(KERN_ERR "hfs: failed to load root directory\n");
 383                 iput(root);
 384                 goto cleanup;
 385         }
 386
 387         str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
 388         str.name = HFSP_HIDDENDIR_NAME;
 389         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
 390         hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
 391         if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
 392                 hfs_find_exit(&fd);
 393                 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
 394                         goto cleanup;
 395                 HFSPLUS_SB(sb).hidden_dir = iget(sb, be32_to_cpu(entry.folder.id));
 396                 if (!HFSPLUS_SB(sb).hidden_dir)
 397                         goto cleanup;
 398         } else
 399                 hfs_find_exit(&fd);
 400
 401         if (sb->s_flags & MS_RDONLY)
 402                 goto out;
 403
 404         /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
 405          * all three are registered with Apple for our use
 406          */
 407         vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
 408         vhdr->modify_date = hfsp_now2mt();
 409         vhdr->write_count = cpu_to_be32(be32_to_cpu(vhdr->write_count) + 1);
 410         vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
 411         vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
 412         mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
 413         sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
 414
 415         if (!HFSPLUS_SB(sb).hidden_dir) {
 416                 printk(KERN_DEBUG "hfs: create hidden dir...\n");
 417                 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
 418                 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
 419                                    &str, HFSPLUS_SB(sb).hidden_dir);
 420                 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
 421         }
 422 out:
 423         unload_nls(sbi->nls);
 424         sbi->nls = nls;
 425         return 0;
 426
 427 cleanup:
 428         hfsplus_put_super(sb);
 429         if (nls)
 430                 unload_nls(nls);
 431         return err;
 432 }
 433
 434 MODULE_AUTHOR("Brad Boyer");
 435 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
 436 MODULE_LICENSE("GPL");
 437
 438 static kmem_cache_t *hfsplus_inode_cachep;
 439
 440 static struct inode *hfsplus_alloc_inode(struct super_block *sb)
 441 {
 442         struct hfsplus_inode_info *i;
 443
 444         i = kmem_cache_alloc(hfsplus_inode_cachep, SLAB_KERNEL);
 445         return i ? &i->vfs_inode : NULL;
 446 }
 447
 448 static void hfsplus_destroy_inode(struct inode *inode)
 449 {
 450         kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
 451 }
 452
 453 #define HFSPLUS_INODE_SIZE      sizeof(struct hfsplus_inode_info)
 454
 455 static int hfsplus_get_sb(struct file_system_type *fs_type,
 456                           int flags, const char *dev_name, void *data,
 457                           struct vfsmount *mnt)
 458 {
 459         return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
 460                            mnt);
 461 }
 462
 463 static struct file_system_type hfsplus_fs_type = {
 464         .owner          = THIS_MODULE,
 465         .name           = "hfsplus",
 466         .get_sb         = hfsplus_get_sb,
 467         .kill_sb        = kill_block_super,
 468         .fs_flags       = FS_REQUIRES_DEV,
 469 };
 470
 471 static void hfsplus_init_once(void *p, kmem_cache_t *cachep, unsigned long flags)
 472 {
 473         struct hfsplus_inode_info *i = p;
 474
 475         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR)
 476                 inode_init_once(&i->vfs_inode);
 477 }
 478
 479 static int __init init_hfsplus_fs(void)
 480 {
 481         int err;
 482
 483         hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
 484                 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
 485                 hfsplus_init_once, NULL);
 486         if (!hfsplus_inode_cachep)
 487                 return -ENOMEM;
 488         err = register_filesystem(&hfsplus_fs_type);
 489         if (err)
 490                 kmem_cache_destroy(hfsplus_inode_cachep);
 491         return err;
 492 }
 493
 494 static void __exit exit_hfsplus_fs(void)
 495 {
 496         unregister_filesystem(&hfsplus_fs_type);
 497         if (kmem_cache_destroy(hfsplus_inode_cachep))
 498                 printk(KERN_ERR "hfsplus_inode_cache: not all structures were freed\n");
 499 }
 500
 501 module_init(init_hfsplus_fs)
 502 module_exit(exit_hfsplus_fs)