release/src-rt-6.x/linux/linux-2.6/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/slab.h>
  15 #include <linux/vfs.h>
  16 #include <linux/nls.h>
  17
  18 static struct inode *hfsplus_alloc_inode(struct super_block *sb);
  19 static void hfsplus_destroy_inode(struct inode *inode);
  20
  21 #include "hfsplus_fs.h"
  22
  23 static void hfsplus_read_inode(struct inode *inode)
  24 {
  25         struct hfs_find_data fd;
  26         struct hfsplus_vh *vhdr;
  27         int err;
  28
  29         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
  30         mutex_init(&HFSPLUS_I(inode).extents_lock);
  31         HFSPLUS_I(inode).flags = 0;
  32         HFSPLUS_I(inode).rsrc_inode = NULL;
  33         atomic_set(&HFSPLUS_I(inode).opencnt, 0);
  34
  35         if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
  36         read_inode:
  37                 hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd);
  38                 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
  39                 if (!err)
  40                         err = hfsplus_cat_read_inode(inode, &fd);
  41                 hfs_find_exit(&fd);
  42                 if (err)
  43                         goto bad_inode;
  44                 return;
  45         }
  46         vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
  47         switch(inode->i_ino) {
  48         case HFSPLUS_ROOT_CNID:
  49                 goto read_inode;
  50         case HFSPLUS_EXT_CNID:
  51                 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
  52                 inode->i_mapping->a_ops = &hfsplus_btree_aops;
  53                 break;
  54         case HFSPLUS_CAT_CNID:
  55                 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
  56                 inode->i_mapping->a_ops = &hfsplus_btree_aops;
  57                 break;
  58         case HFSPLUS_ALLOC_CNID:
  59                 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
  60                 inode->i_mapping->a_ops = &hfsplus_aops;
  61                 break;
  62         case HFSPLUS_START_CNID:
  63                 hfsplus_inode_read_fork(inode, &vhdr->start_file);
  64                 break;
  65         case HFSPLUS_ATTR_CNID:
  66                 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
  67                 inode->i_mapping->a_ops = &hfsplus_btree_aops;
  68                 break;
  69         default:
  70                 goto bad_inode;
  71         }
  72
  73         return;
  74
  75  bad_inode:
  76         make_bad_inode(inode);
  77 }
  78
  79 static int hfsplus_write_inode(struct inode *inode, int unused)
  80 {
  81         struct hfsplus_vh *vhdr;
  82         int ret = 0;
  83
  84         dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
  85         hfsplus_ext_write_extent(inode);
  86         if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
  87                 return hfsplus_cat_write_inode(inode);
  88         }
  89         vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
  90         switch (inode->i_ino) {
  91         case HFSPLUS_ROOT_CNID:
  92                 ret = hfsplus_cat_write_inode(inode);
  93                 break;
  94         case HFSPLUS_EXT_CNID:
  95                 if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) {
  96                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
  97                         inode->i_sb->s_dirt = 1;
  98                 }
  99                 hfsplus_inode_write_fork(inode, &vhdr->ext_file);
 100                 hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree);
 101                 break;
 102         case HFSPLUS_CAT_CNID:
 103                 if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) {
 104                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
 105                         inode->i_sb->s_dirt = 1;
 106                 }
 107                 hfsplus_inode_write_fork(inode, &vhdr->cat_file);
 108                 hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree);
 109                 break;
 110         case HFSPLUS_ALLOC_CNID:
 111                 if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) {
 112                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
 113                         inode->i_sb->s_dirt = 1;
 114                 }
 115                 hfsplus_inode_write_fork(inode, &vhdr->alloc_file);
 116                 break;
 117         case HFSPLUS_START_CNID:
 118                 if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) {
 119                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
 120                         inode->i_sb->s_dirt = 1;
 121                 }
 122                 hfsplus_inode_write_fork(inode, &vhdr->start_file);
 123                 break;
 124         case HFSPLUS_ATTR_CNID:
 125                 if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) {
 126                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
 127                         inode->i_sb->s_dirt = 1;
 128                 }
 129                 hfsplus_inode_write_fork(inode, &vhdr->attr_file);
 130                 hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree);
 131                 break;
 132         }
 133         return ret;
 134 }
 135
 136 static void hfsplus_clear_inode(struct inode *inode)
 137 {
 138         dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino);
 139         if (HFSPLUS_IS_RSRC(inode)) {
 140                 HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL;
 141                 iput(HFSPLUS_I(inode).rsrc_inode);
 142         }
 143 }
 144
 145 static int hfsplus_sync_fs(struct super_block *sb, int wait)
 146 {
 147         struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
 148
 149         dprint(DBG_SUPER, "hfsplus_write_super\n");
 150         sb->s_dirt = 0;
 151
 152         vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
 153         vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
 154         vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid);
 155         vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count);
 156         vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count);
 157
 158         mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
 159         if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) {
 160                 if (HFSPLUS_SB(sb).sect_count) {
 161                         struct buffer_head *bh;
 162                         u32 block, offset;
 163
 164                         block = HFSPLUS_SB(sb).blockoffset;
 165                         block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9);
 166                         offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1);
 167                         printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset,
 168                                 HFSPLUS_SB(sb).sect_count, block, offset);
 169                         bh = sb_bread(sb, block);
 170                         if (bh) {
 171                                 vhdr = (struct hfsplus_vh *)(bh->b_data + offset);
 172                                 if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) {
 173                                         memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr));
 174                                         mark_buffer_dirty(bh);
 175                                         brelse(bh);
 176                                 } else
 177                                         printk(KERN_WARNING "hfs: backup not found!\n");
 178                         }
 179                 }
 180                 HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
 181         }
 182         return 0;
 183 }
 184
 185 static void hfsplus_write_super(struct super_block *sb)
 186 {
 187         if (!(sb->s_flags & MS_RDONLY))
 188                 hfsplus_sync_fs(sb, 1);
 189         else
 190                 sb->s_dirt = 0;
 191 }
 192
 193 static void hfsplus_put_super(struct super_block *sb)
 194 {
 195         dprint(DBG_SUPER, "hfsplus_put_super\n");
 196         if (!sb->s_fs_info)
 197                 return;
 198         if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
 199                 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
 200
 201                 vhdr->modify_date = hfsp_now2mt();
 202                 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
 203                 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
 204                 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
 205                 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
 206         }
 207
 208         hfs_btree_close(HFSPLUS_SB(sb).cat_tree);
 209         hfs_btree_close(HFSPLUS_SB(sb).ext_tree);
 210         iput(HFSPLUS_SB(sb).alloc_file);
 211         iput(HFSPLUS_SB(sb).hidden_dir);
 212         brelse(HFSPLUS_SB(sb).s_vhbh);
 213         if (HFSPLUS_SB(sb).nls)
 214                 unload_nls(HFSPLUS_SB(sb).nls);
 215         kfree(sb->s_fs_info);
 216         sb->s_fs_info = NULL;
 217 }
 218
 219 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
 220 {
 221         struct super_block *sb = dentry->d_sb;
 222
 223         buf->f_type = HFSPLUS_SUPER_MAGIC;
 224         buf->f_bsize = sb->s_blocksize;
 225         buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
 226         buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift;
 227         buf->f_bavail = buf->f_bfree;
 228         buf->f_files = 0xFFFFFFFF;
 229         buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid;
 230         buf->f_namelen = HFSPLUS_MAX_STRLEN;
 231
 232         return 0;
 233 }
 234
 235 static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
 236 {
 237         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
 238                 return 0;
 239         if (!(*flags & MS_RDONLY)) {
 240                 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
 241                 struct hfsplus_sb_info sbi;
 242
 243                 memset(&sbi, 0, sizeof(struct hfsplus_sb_info));
 244                 sbi.nls = HFSPLUS_SB(sb).nls;
 245                 if (!hfsplus_parse_options(data, &sbi))
 246                         return -EINVAL;
 247
 248                 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
 249                         printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
 250                                "running fsck.hfsplus is recommended.\n");
 251                 } else if (sbi.flags & HFSPLUS_SB_FORCE) {
 252                         /* nothing */
 253                 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
 254                         printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
 255                         sb->s_flags |= MS_RDONLY;
 256                         *flags |= MS_RDONLY;
 257                 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
 258                         printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
 259                         sb->s_flags |= MS_RDONLY;
 260                         *flags |= MS_RDONLY;
 261                 }
 262         }
 263         return 0;
 264 }
 265
 266 static const struct super_operations hfsplus_sops = {
 267         .alloc_inode    = hfsplus_alloc_inode,
 268         .destroy_inode  = hfsplus_destroy_inode,
 269         .read_inode     = hfsplus_read_inode,
 270         .write_inode    = hfsplus_write_inode,
 271         .clear_inode    = hfsplus_clear_inode,
 272         .put_super      = hfsplus_put_super,
 273         .write_super    = hfsplus_write_super,
 274         .sync_fs        = hfsplus_sync_fs,
 275         .statfs         = hfsplus_statfs,
 276         .remount_fs     = hfsplus_remount,
 277         .show_options   = hfsplus_show_options,
 278 };
 279
 280 static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 281 {
 282         struct hfsplus_vh *vhdr;
 283         struct hfsplus_sb_info *sbi;
 284         hfsplus_cat_entry entry;
 285         struct hfs_find_data fd;
 286         struct inode *root;
 287         struct qstr str;
 288         struct nls_table *nls = NULL;
 289         int err = -EINVAL;
 290
 291         sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
 292         if (!sbi)
 293                 return -ENOMEM;
 294
 295         sb->s_fs_info = sbi;
 296         INIT_HLIST_HEAD(&sbi->rsrc_inodes);
 297         hfsplus_fill_defaults(sbi);
 298         if (!hfsplus_parse_options(data, sbi)) {
 299                 printk(KERN_ERR "hfs: unable to parse mount options\n");
 300                 err = -EINVAL;
 301                 goto cleanup;
 302         }
 303
 304         /* temporarily use utf8 to correctly find the hidden dir below */
 305         nls = sbi->nls;
 306         sbi->nls = load_nls("utf8");
 307         if (!sbi->nls) {
 308                 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
 309                 err = -EINVAL;
 310                 goto cleanup;
 311         }
 312
 313         /* Grab the volume header */
 314         if (hfsplus_read_wrapper(sb)) {
 315                 if (!silent)
 316                         printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
 317                 err = -EINVAL;
 318                 goto cleanup;
 319         }
 320         vhdr = HFSPLUS_SB(sb).s_vhdr;
 321
 322         /* Copy parts of the volume header into the superblock */
 323         sb->s_magic = HFSPLUS_VOLHEAD_SIG;
 324         if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
 325             be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
 326                 printk(KERN_ERR "hfs: wrong filesystem version\n");
 327                 goto cleanup;
 328         }
 329         HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks);
 330         HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks);
 331         HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc);
 332         HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid);
 333         HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count);
 334         HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count);
 335         HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
 336         if (!HFSPLUS_SB(sb).data_clump_blocks)
 337                 HFSPLUS_SB(sb).data_clump_blocks = 1;
 338         HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
 339         if (!HFSPLUS_SB(sb).rsrc_clump_blocks)
 340                 HFSPLUS_SB(sb).rsrc_clump_blocks = 1;
 341
 342         /* Set up operations so we can load metadata */
 343         sb->s_op = &hfsplus_sops;
 344         sb->s_maxbytes = MAX_LFS_FILESIZE;
 345
 346         if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
 347                 printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
 348                        "running fsck.hfsplus is recommended.\n");
 349         } else if (sbi->flags & HFSPLUS_SB_FORCE) {
 350                 /* nothing */
 351         } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
 352                 printk(KERN_WARNING "hfs: 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)) && !(sb->s_flags & MS_RDONLY)) {
 355                 printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, "
 356                        "use the force option at your own risk, mounting read-only.\n");
 357                 sb->s_flags |= MS_RDONLY;
 358         }
 359         sbi->flags &= ~HFSPLUS_SB_FORCE;
 360
 361         /* Load metadata objects (B*Trees) */
 362         HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
 363         if (!HFSPLUS_SB(sb).ext_tree) {
 364                 printk(KERN_ERR "hfs: failed to load extents file\n");
 365                 goto cleanup;
 366         }
 367         HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
 368         if (!HFSPLUS_SB(sb).cat_tree) {
 369                 printk(KERN_ERR "hfs: failed to load catalog file\n");
 370                 goto cleanup;
 371         }
 372
 373         HFSPLUS_SB(sb).alloc_file = iget(sb, HFSPLUS_ALLOC_CNID);
 374         if (!HFSPLUS_SB(sb).alloc_file) {
 375                 printk(KERN_ERR "hfs: failed to load allocation file\n");
 376                 goto cleanup;
 377         }
 378
 379         /* Load the root directory */
 380         root = iget(sb, HFSPLUS_ROOT_CNID);
 381         sb->s_root = d_alloc_root(root);
 382         if (!sb->s_root) {
 383                 printk(KERN_ERR "hfs: failed to load root directory\n");
 384                 iput(root);
 385                 goto cleanup;
 386         }
 387         sb->s_root->d_op = &hfsplus_dentry_operations;
 388
 389         str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
 390         str.name = HFSP_HIDDENDIR_NAME;
 391         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
 392         hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
 393         if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
 394                 hfs_find_exit(&fd);
 395                 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
 396                         goto cleanup;
 397                 HFSPLUS_SB(sb).hidden_dir = iget(sb, be32_to_cpu(entry.folder.id));
 398                 if (!HFSPLUS_SB(sb).hidden_dir)
 399                         goto cleanup;
 400         } else
 401                 hfs_find_exit(&fd);
 402
 403         if (sb->s_flags & MS_RDONLY)
 404                 goto out;
 405
 406         /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
 407          * all three are registered with Apple for our use
 408          */
 409         vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
 410         vhdr->modify_date = hfsp_now2mt();
 411         vhdr->write_count = cpu_to_be32(be32_to_cpu(vhdr->write_count) + 1);
 412         vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
 413         vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
 414         mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
 415         sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
 416
 417         if (!HFSPLUS_SB(sb).hidden_dir) {
 418                 printk(KERN_DEBUG "hfs: create hidden dir...\n");
 419                 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
 420                 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
 421                                    &str, HFSPLUS_SB(sb).hidden_dir);
 422                 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
 423         }
 424 out:
 425         unload_nls(sbi->nls);
 426         sbi->nls = nls;
 427         return 0;
 428
 429 cleanup:
 430         hfsplus_put_super(sb);
 431         if (nls)
 432                 unload_nls(nls);
 433         return err;
 434 }
 435
 436 MODULE_AUTHOR("Brad Boyer");
 437 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
 438 MODULE_LICENSE("GPL");
 439
 440 static struct kmem_cache *hfsplus_inode_cachep;
 441
 442 static struct inode *hfsplus_alloc_inode(struct super_block *sb)
 443 {
 444         struct hfsplus_inode_info *i;
 445
 446         i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
 447         return i ? &i->vfs_inode : NULL;
 448 }
 449
 450 static void hfsplus_destroy_inode(struct inode *inode)
 451 {
 452         kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
 453 }
 454
 455 #define HFSPLUS_INODE_SIZE      sizeof(struct hfsplus_inode_info)
 456
 457 static int hfsplus_get_sb(struct file_system_type *fs_type,
 458                           int flags, const char *dev_name, void *data,
 459                           struct vfsmount *mnt)
 460 {
 461         return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
 462                            mnt);
 463 }
 464
 465 static struct file_system_type hfsplus_fs_type = {
 466         .owner          = THIS_MODULE,
 467         .name           = "hfsplus",
 468         .get_sb         = hfsplus_get_sb,
 469         .kill_sb        = kill_block_super,
 470         .fs_flags       = FS_REQUIRES_DEV,
 471 };
 472
 473 static void hfsplus_init_once(void *p, struct kmem_cache *cachep, unsigned long flags)
 474 {
 475         struct hfsplus_inode_info *i = p;
 476
 477         inode_init_once(&i->vfs_inode);
 478 }
 479
 480 static int __init init_hfsplus_fs(void)
 481 {
 482         int err;
 483
 484         hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
 485                 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
 486                 hfsplus_init_once, NULL);
 487         if (!hfsplus_inode_cachep)
 488                 return -ENOMEM;
 489         err = register_filesystem(&hfsplus_fs_type);
 490         if (err)
 491                 kmem_cache_destroy(hfsplus_inode_cachep);
 492         return err;
 493 }
 494
 495 static void __exit exit_hfsplus_fs(void)
 496 {
 497         unregister_filesystem(&hfsplus_fs_type);
 498         kmem_cache_destroy(hfsplus_inode_cachep);
 499 }
 500
 501 module_init(init_hfsplus_fs)
 502 module_exit(exit_hfsplus_fs)