fs/hfsplus/inode.c

   1 /*
   2  *  linux/fs/hfsplus/inode.c
   3  *
   4  * Copyright (C) 2001
   5  * Brad Boyer (flar@allandria.com)
   6  * (C) 2003 Ardis Technologies <roman@ardistech.com>
   7  *
   8  * Inode handling routines
   9  */
  10
  11 #include <linux/mm.h>
  12 #include <linux/fs.h>
  13 #include <linux/pagemap.h>
  14 #include <linux/version.h>
  15 #include <linux/mpage.h>
  16
  17 #include "hfsplus_fs.h"
  18 #include "hfsplus_raw.h"
  19
  20 static int hfsplus_readpage(struct file *file, struct page *page)
  21 {
  22         //printk("readpage: %lu\n", page->index);
  23         return block_read_full_page(page, hfsplus_get_block);
  24 }
  25
  26 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
  27 {
  28         //printk("writepage: %lu\n", page->index);
  29         return block_write_full_page(page, hfsplus_get_block, wbc);
  30 }
  31
  32 static int hfsplus_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
  33 {
  34         return cont_prepare_write(page, from, to, hfsplus_get_block,
  35                 &HFSPLUS_I(page->mapping->host).phys_size);
  36 }
  37
  38 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  39 {
  40         return generic_block_bmap(mapping, block, hfsplus_get_block);
  41 }
  42
  43 int hfsplus_releasepage(struct page *page, int mask)
  44 {
  45         struct inode *inode = page->mapping->host;
  46         struct super_block *sb = inode->i_sb;
  47         struct hfs_btree *tree;
  48         struct hfs_bnode *node;
  49         u32 nidx;
  50         int i, res = 1;
  51
  52         switch (inode->i_ino) {
  53         case HFSPLUS_EXT_CNID:
  54                 tree = HFSPLUS_SB(sb).ext_tree;
  55                 break;
  56         case HFSPLUS_CAT_CNID:
  57                 tree = HFSPLUS_SB(sb).cat_tree;
  58                 break;
  59         case HFSPLUS_ATTR_CNID:
  60                 tree = HFSPLUS_SB(sb).attr_tree;
  61                 break;
  62         default:
  63                 BUG();
  64                 return 0;
  65         }
  66         if (tree->node_size >= PAGE_CACHE_SIZE) {
  67                 nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
  68                 spin_lock(&tree->hash_lock);
  69                 node = hfs_bnode_findhash(tree, nidx);
  70                 if (!node)
  71                         ;
  72                 else if (atomic_read(&node->refcnt))
  73                         res = 0;
  74                 else for (i = 0; i < tree->pages_per_bnode; i++) {
  75                         if (PageActive(node->page[i])) {
  76                                 res = 0;
  77                                 break;
  78                         }
  79                 }
  80                 if (res && node) {
  81                         hfs_bnode_unhash(node);
  82                         hfs_bnode_free(node);
  83                 }
  84                 spin_unlock(&tree->hash_lock);
  85         } else {
  86                 nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
  87                 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
  88                 spin_lock(&tree->hash_lock);
  89                 do {
  90                         node = hfs_bnode_findhash(tree, nidx++);
  91                         if (!node)
  92                                 continue;
  93                         if (atomic_read(&node->refcnt)) {
  94                                 res = 0;
  95                                 break;
  96                         }
  97                         hfs_bnode_unhash(node);
  98                         hfs_bnode_free(node);
  99                 } while (--i && nidx < tree->node_count);
 100                 spin_unlock(&tree->hash_lock);
 101         }
 102         //printk("releasepage: %lu,%x = %d\n", page->index, mask, res);
 103         return res;
 104 }
 105
 106 static int hfsplus_get_blocks(struct inode *inode, sector_t iblock, unsigned long max_blocks,
 107                               struct buffer_head *bh_result, int create)
 108 {
 109         int ret;
 110
 111         ret = hfsplus_get_block(inode, iblock, bh_result, create);
 112         if (!ret)
 113                 bh_result->b_size = (1 << inode->i_blkbits);
 114         return ret;
 115 }
 116
 117 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
 118                 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
 119 {
 120         struct file *file = iocb->ki_filp;
 121         struct inode *inode = file->f_dentry->d_inode->i_mapping->host;
 122
 123         return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
 124                                   offset, nr_segs, hfsplus_get_blocks, NULL);
 125 }
 126
 127 static int hfsplus_writepages(struct address_space *mapping,
 128                               struct writeback_control *wbc)
 129 {
 130         return mpage_writepages(mapping, wbc, hfsplus_get_block);
 131 }
 132
 133 struct address_space_operations hfsplus_btree_aops = {
 134         .readpage       = hfsplus_readpage,
 135         .writepage      = hfsplus_writepage,
 136         .sync_page      = block_sync_page,
 137         .prepare_write  = hfsplus_prepare_write,
 138         .commit_write   = generic_commit_write,
 139         .bmap           = hfsplus_bmap,
 140         .releasepage    = hfsplus_releasepage,
 141 };
 142
 143 struct address_space_operations hfsplus_aops = {
 144         .readpage       = hfsplus_readpage,
 145         .writepage      = hfsplus_writepage,
 146         .sync_page      = block_sync_page,
 147         .prepare_write  = hfsplus_prepare_write,
 148         .commit_write   = generic_commit_write,
 149         .bmap           = hfsplus_bmap,
 150         .direct_IO      = hfsplus_direct_IO,
 151         .writepages     = hfsplus_writepages,
 152 };
 153
 154 static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry,
 155                                           struct nameidata *nd)
 156 {
 157         struct hfs_find_data fd;
 158         struct super_block *sb = dir->i_sb;
 159         struct inode *inode = NULL;
 160         int err;
 161
 162         if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
 163                 goto out;
 164
 165         inode = HFSPLUS_I(dir).rsrc_inode;
 166         if (inode)
 167                 goto out;
 168
 169         inode = new_inode(sb);
 170         if (!inode)
 171                 return ERR_PTR(-ENOMEM);
 172
 173         inode->i_ino = dir->i_ino;
 174         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
 175         init_MUTEX(&HFSPLUS_I(inode).extents_lock);
 176         HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC;
 177
 178         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
 179         err = hfsplus_find_cat(sb, dir->i_ino, &fd);
 180         if (!err)
 181                 err = hfsplus_cat_read_inode(inode, &fd);
 182         hfs_find_exit(&fd);
 183         if (err) {
 184                 iput(inode);
 185                 return ERR_PTR(err);
 186         }
 187         HFSPLUS_I(inode).rsrc_inode = dir;
 188         HFSPLUS_I(dir).rsrc_inode = inode;
 189         igrab(dir);
 190         hlist_add_head(&inode->i_hash, &HFSPLUS_SB(sb).rsrc_inodes);
 191         mark_inode_dirty(inode);
 192         {
 193         void hfsplus_inode_check(struct super_block *sb);
 194         atomic_inc(&HFSPLUS_SB(sb).inode_cnt);
 195         hfsplus_inode_check(sb);
 196         }
 197 out:
 198         d_add(dentry, inode);
 199         return NULL;
 200 }
 201
 202 static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
 203 {
 204         struct super_block *sb = inode->i_sb;
 205         u16 mode;
 206
 207         mode = be16_to_cpu(perms->mode);
 208
 209         inode->i_uid = be32_to_cpu(perms->owner);
 210         if (!inode->i_uid && !mode)
 211                 inode->i_uid = HFSPLUS_SB(sb).uid;
 212
 213         inode->i_gid = be32_to_cpu(perms->group);
 214         if (!inode->i_gid && !mode)
 215                 inode->i_gid = HFSPLUS_SB(sb).gid;
 216
 217         if (dir) {
 218                 mode = mode ? (mode & S_IALLUGO) :
 219                         (S_IRWXUGO & ~(HFSPLUS_SB(sb).umask));
 220                 mode |= S_IFDIR;
 221         } else if (!mode)
 222                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) &
 223                         ~(HFSPLUS_SB(sb).umask));
 224         inode->i_mode = mode;
 225
 226         HFSPLUS_I(inode).rootflags = perms->rootflags;
 227         HFSPLUS_I(inode).userflags = perms->userflags;
 228         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
 229                 inode->i_flags |= S_IMMUTABLE;
 230         else
 231                 inode->i_flags &= ~S_IMMUTABLE;
 232         if (perms->rootflags & HFSPLUS_FLG_APPEND)
 233                 inode->i_flags |= S_APPEND;
 234         else
 235                 inode->i_flags &= ~S_APPEND;
 236 }
 237
 238 static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
 239 {
 240         if (inode->i_flags & S_IMMUTABLE)
 241                 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
 242         else
 243                 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
 244         if (inode->i_flags & S_APPEND)
 245                 perms->rootflags |= HFSPLUS_FLG_APPEND;
 246         else
 247                 perms->rootflags &= ~HFSPLUS_FLG_APPEND;
 248         perms->userflags = HFSPLUS_I(inode).userflags;
 249         perms->mode = cpu_to_be16(inode->i_mode);
 250         perms->owner = cpu_to_be32(inode->i_uid);
 251         perms->group = cpu_to_be32(inode->i_gid);
 252         perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev);
 253 }
 254
 255 static int hfsplus_permission(struct inode *inode, int mask, struct nameidata *nd)
 256 {
 257         /* MAY_EXEC is also used for lookup, if no x bit is set allow lookup,
 258          * open_exec has the same test, so it's still not executable, if a x bit
 259          * is set fall back to standard permission check.
 260          */
 261         if (S_ISREG(inode->i_mode) && mask & MAY_EXEC && !(inode->i_mode & 0111))
 262                 return 0;
 263         return generic_permission(inode, mask, NULL);
 264 }
 265
 266
 267 static int hfsplus_file_open(struct inode *inode, struct file *file)
 268 {
 269         if (HFSPLUS_IS_RSRC(inode))
 270                 inode = HFSPLUS_I(inode).rsrc_inode;
 271         if (atomic_read(&file->f_count) != 1)
 272                 return 0;
 273         atomic_inc(&HFSPLUS_I(inode).opencnt);
 274         return 0;
 275 }
 276
 277 static int hfsplus_file_release(struct inode *inode, struct file *file)
 278 {
 279         struct super_block *sb = inode->i_sb;
 280
 281         if (HFSPLUS_IS_RSRC(inode))
 282                 inode = HFSPLUS_I(inode).rsrc_inode;
 283         if (atomic_read(&file->f_count) != 0)
 284                 return 0;
 285         if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
 286                 down(&inode->i_sem);
 287                 hfsplus_file_truncate(inode);
 288                 if (inode->i_flags & S_DEAD) {
 289                         hfsplus_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
 290                         hfsplus_delete_inode(inode);
 291                 }
 292                 up(&inode->i_sem);
 293         }
 294         return 0;
 295 }
 296
 297 extern struct inode_operations hfsplus_dir_inode_operations;
 298 extern struct file_operations hfsplus_dir_operations;
 299
 300 struct inode_operations hfsplus_file_inode_operations = {
 301         .lookup         = hfsplus_file_lookup,
 302         .truncate       = hfsplus_file_truncate,
 303         .permission     = hfsplus_permission,
 304         .setxattr       = hfsplus_setxattr,
 305         .getxattr       = hfsplus_getxattr,
 306         .listxattr      = hfsplus_listxattr,
 307 };
 308
 309 struct file_operations hfsplus_file_operations = {
 310         .llseek         = generic_file_llseek,
 311         .read           = generic_file_read,
 312         .write          = generic_file_write,
 313         .mmap           = generic_file_mmap,
 314         .sendfile       = generic_file_sendfile,
 315         .fsync          = file_fsync,
 316         .open           = hfsplus_file_open,
 317         .release        = hfsplus_file_release,
 318         .ioctl          = hfsplus_ioctl,
 319 };
 320
 321 struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
 322 {
 323         struct inode *inode = new_inode(sb);
 324         if (!inode)
 325                 return NULL;
 326
 327         {
 328         void hfsplus_inode_check(struct super_block *sb);
 329         atomic_inc(&HFSPLUS_SB(sb).inode_cnt);
 330         hfsplus_inode_check(sb);
 331         }
 332         inode->i_ino = HFSPLUS_SB(sb).next_cnid++;
 333         inode->i_mode = mode;
 334         inode->i_uid = current->fsuid;
 335         inode->i_gid = current->fsgid;
 336         inode->i_nlink = 1;
 337         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 338         inode->i_blksize = HFSPLUS_SB(sb).alloc_blksz;
 339         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
 340         init_MUTEX(&HFSPLUS_I(inode).extents_lock);
 341         atomic_set(&HFSPLUS_I(inode).opencnt, 0);
 342         HFSPLUS_I(inode).flags = 0;
 343         memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec));
 344         memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
 345         HFSPLUS_I(inode).alloc_blocks = 0;
 346         HFSPLUS_I(inode).first_blocks = 0;
 347         HFSPLUS_I(inode).cached_start = 0;
 348         HFSPLUS_I(inode).cached_blocks = 0;
 349         HFSPLUS_I(inode).phys_size = 0;
 350         HFSPLUS_I(inode).fs_blocks = 0;
 351         HFSPLUS_I(inode).rsrc_inode = NULL;
 352         if (S_ISDIR(inode->i_mode)) {
 353                 inode->i_size = 2;
 354                 HFSPLUS_SB(sb).folder_count++;
 355                 inode->i_op = &hfsplus_dir_inode_operations;
 356                 inode->i_fop = &hfsplus_dir_operations;
 357         } else if (S_ISREG(inode->i_mode)) {
 358                 HFSPLUS_SB(sb).file_count++;
 359                 inode->i_op = &hfsplus_file_inode_operations;
 360                 inode->i_fop = &hfsplus_file_operations;
 361                 inode->i_mapping->a_ops = &hfsplus_aops;
 362                 HFSPLUS_I(inode).clump_blocks = HFSPLUS_SB(sb).data_clump_blocks;
 363         } else if (S_ISLNK(inode->i_mode)) {
 364                 HFSPLUS_SB(sb).file_count++;
 365                 inode->i_op = &page_symlink_inode_operations;
 366                 inode->i_mapping->a_ops = &hfsplus_aops;
 367                 HFSPLUS_I(inode).clump_blocks = 1;
 368         } else
 369                 HFSPLUS_SB(sb).file_count++;
 370         insert_inode_hash(inode);
 371         mark_inode_dirty(inode);
 372         sb->s_dirt = 1;
 373
 374         return inode;
 375 }
 376
 377 void hfsplus_delete_inode(struct inode *inode)
 378 {
 379         struct super_block *sb = inode->i_sb;
 380
 381         if (S_ISDIR(inode->i_mode)) {
 382                 HFSPLUS_SB(sb).folder_count--;
 383                 sb->s_dirt = 1;
 384                 return;
 385         }
 386         HFSPLUS_SB(sb).file_count--;
 387         if (S_ISREG(inode->i_mode)) {
 388                 if (!inode->i_nlink) {
 389                         inode->i_size = 0;
 390                         hfsplus_file_truncate(inode);
 391                 }
 392         } else if (S_ISLNK(inode->i_mode)) {
 393                 inode->i_size = 0;
 394                 hfsplus_file_truncate(inode);
 395         }
 396         sb->s_dirt = 1;
 397 }
 398
 399 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 400 {
 401         struct super_block *sb = inode->i_sb;
 402         u32 count;
 403         int i;
 404
 405         memcpy(&HFSPLUS_I(inode).first_extents, &fork->extents,
 406                sizeof(hfsplus_extent_rec));
 407         for (count = 0, i = 0; i < 8; i++)
 408                 count += be32_to_cpu(fork->extents[i].block_count);
 409         HFSPLUS_I(inode).first_blocks = count;
 410         memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
 411         HFSPLUS_I(inode).cached_start = 0;
 412         HFSPLUS_I(inode).cached_blocks = 0;
 413
 414         HFSPLUS_I(inode).alloc_blocks = be32_to_cpu(fork->total_blocks);
 415         inode->i_size = HFSPLUS_I(inode).phys_size = be64_to_cpu(fork->total_size);
 416         HFSPLUS_I(inode).fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 417         inode_set_bytes(inode, HFSPLUS_I(inode).fs_blocks << sb->s_blocksize_bits);
 418         HFSPLUS_I(inode).clump_blocks = be32_to_cpu(fork->clump_size) >> HFSPLUS_SB(sb).alloc_blksz_shift;
 419         if (!HFSPLUS_I(inode).clump_blocks)
 420                 HFSPLUS_I(inode).clump_blocks = HFSPLUS_IS_RSRC(inode) ? HFSPLUS_SB(sb).rsrc_clump_blocks :
 421                                 HFSPLUS_SB(sb).data_clump_blocks;
 422 }
 423
 424 void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 425 {
 426         memcpy(&fork->extents, &HFSPLUS_I(inode).first_extents,
 427                sizeof(hfsplus_extent_rec));
 428         fork->total_size = cpu_to_be64(inode->i_size);
 429         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode).alloc_blocks);
 430 }
 431
 432 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 433 {
 434         hfsplus_cat_entry entry;
 435         int res = 0;
 436         u16 type;
 437
 438         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 439
 440         HFSPLUS_I(inode).dev = 0;
 441         inode->i_blksize = HFSPLUS_SB(inode->i_sb).alloc_blksz;
 442         if (type == HFSPLUS_FOLDER) {
 443                 struct hfsplus_cat_folder *folder = &entry.folder;
 444
 445                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
 446                         /* panic? */;
 447                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 448                                         sizeof(struct hfsplus_cat_folder));
 449                 hfsplus_get_perms(inode, &folder->permissions, 1);
 450                 inode->i_nlink = 1;
 451                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 452                 inode->i_atime = hfsp_mt2ut(folder->access_date);
 453                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
 454                 inode->i_ctime = inode->i_mtime;
 455                 HFSPLUS_I(inode).fs_blocks = 0;
 456                 inode->i_op = &hfsplus_dir_inode_operations;
 457                 inode->i_fop = &hfsplus_dir_operations;
 458         } else if (type == HFSPLUS_FILE) {
 459                 struct hfsplus_cat_file *file = &entry.file;
 460
 461                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 462                         /* panic? */;
 463                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 464                                         sizeof(struct hfsplus_cat_file));
 465
 466                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ?
 467                                         &file->data_fork : &file->rsrc_fork);
 468                 hfsplus_get_perms(inode, &file->permissions, 0);
 469                 inode->i_nlink = 1;
 470                 if (S_ISREG(inode->i_mode)) {
 471                         if (file->permissions.dev)
 472                                 inode->i_nlink = be32_to_cpu(file->permissions.dev);
 473                         inode->i_op = &hfsplus_file_inode_operations;
 474                         inode->i_fop = &hfsplus_file_operations;
 475                         inode->i_mapping->a_ops = &hfsplus_aops;
 476                 } else if (S_ISLNK(inode->i_mode)) {
 477                         inode->i_op = &page_symlink_inode_operations;
 478                         inode->i_mapping->a_ops = &hfsplus_aops;
 479                 } else {
 480                         init_special_inode(inode, inode->i_mode,
 481                                            be32_to_cpu(file->permissions.dev));
 482                 }
 483                 inode->i_atime = hfsp_mt2ut(file->access_date);
 484                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
 485                 inode->i_ctime = inode->i_mtime;
 486         } else {
 487                 printk("HFS+-fs: bad catalog entry used to create inode\n");
 488                 res = -EIO;
 489         }
 490         return res;
 491 }
 492
 493 int hfsplus_cat_write_inode(struct inode *inode)
 494 {
 495         struct inode *main_inode = inode;
 496         struct hfs_find_data fd;
 497         hfsplus_cat_entry entry;
 498
 499         if (HFSPLUS_IS_RSRC(inode))
 500                 main_inode = HFSPLUS_I(inode).rsrc_inode;
 501
 502         if (!main_inode->i_nlink)
 503                 return 0;
 504
 505         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd))
 506                 /* panic? */
 507                 return -EIO;
 508
 509         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 510                 /* panic? */
 511                 goto out;
 512
 513         if (S_ISDIR(main_inode->i_mode)) {
 514                 struct hfsplus_cat_folder *folder = &entry.folder;
 515
 516                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 517                         /* panic? */;
 518                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 519                                         sizeof(struct hfsplus_cat_folder));
 520                 /* simple node checks? */
 521                 hfsplus_set_perms(inode, &folder->permissions);
 522                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 523                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 524                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 525                 folder->valence = cpu_to_be32(inode->i_size - 2);
 526                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 527                                          sizeof(struct hfsplus_cat_folder));
 528         } else if (HFSPLUS_IS_RSRC(inode)) {
 529                 struct hfsplus_cat_file *file = &entry.file;
 530                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 531                                sizeof(struct hfsplus_cat_file));
 532                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 533                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 534                                 sizeof(struct hfsplus_cat_file));
 535         } else {
 536                 struct hfsplus_cat_file *file = &entry.file;
 537
 538                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 539                         /* panic? */;
 540                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 541                                         sizeof(struct hfsplus_cat_file));
 542                 hfsplus_inode_write_fork(inode, &file->data_fork);
 543                 if (S_ISREG(inode->i_mode))
 544                         HFSPLUS_I(inode).dev = inode->i_nlink;
 545                 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 546                         HFSPLUS_I(inode).dev = kdev_t_to_nr(inode->i_rdev);
 547                 hfsplus_set_perms(inode, &file->permissions);
 548                 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
 549                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 550                 else
 551                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 552                 file->access_date = hfsp_ut2mt(inode->i_atime);
 553                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 554                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 555                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 556                                          sizeof(struct hfsplus_cat_file));
 557         }
 558 out:
 559         hfs_find_exit(&fd);
 560         return 0;
 561 }