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/blkdev.h>
  12 #include <linux/mm.h>
  13 #include <linux/fs.h>
  14 #include <linux/pagemap.h>
  15 #include <linux/mpage.h>
  16 #include <linux/sched.h>
  17
  18 #include "hfsplus_fs.h"
  19 #include "hfsplus_raw.h"
  20
  21 static int hfsplus_readpage(struct file *file, struct page *page)
  22 {
  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         return block_write_full_page(page, hfsplus_get_block, wbc);
  29 }
  30
  31 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
  32                         loff_t pos, unsigned len, unsigned flags,
  33                         struct page **pagep, void **fsdata)
  34 {
  35         int ret;
  36
  37         *pagep = NULL;
  38         ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
  39                                 hfsplus_get_block,
  40                                 &HFSPLUS_I(mapping->host)->phys_size);
  41         if (unlikely(ret)) {
  42                 loff_t isize = mapping->host->i_size;
  43                 if (pos + len > isize)
  44                         vmtruncate(mapping->host, isize);
  45         }
  46
  47         return ret;
  48 }
  49
  50 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  51 {
  52         return generic_block_bmap(mapping, block, hfsplus_get_block);
  53 }
  54
  55 static int hfsplus_releasepage(struct page *page, gfp_t mask)
  56 {
  57         struct inode *inode = page->mapping->host;
  58         struct super_block *sb = inode->i_sb;
  59         struct hfs_btree *tree;
  60         struct hfs_bnode *node;
  61         u32 nidx;
  62         int i, res = 1;
  63
  64         switch (inode->i_ino) {
  65         case HFSPLUS_EXT_CNID:
  66                 tree = HFSPLUS_SB(sb)->ext_tree;
  67                 break;
  68         case HFSPLUS_CAT_CNID:
  69                 tree = HFSPLUS_SB(sb)->cat_tree;
  70                 break;
  71         case HFSPLUS_ATTR_CNID:
  72                 tree = HFSPLUS_SB(sb)->attr_tree;
  73                 break;
  74         default:
  75                 BUG();
  76                 return 0;
  77         }
  78         if (!tree)
  79                 return 0;
  80         if (tree->node_size >= PAGE_CACHE_SIZE) {
  81                 nidx = page->index >>
  82                         (tree->node_size_shift - PAGE_CACHE_SHIFT);
  83                 spin_lock(&tree->hash_lock);
  84                 node = hfs_bnode_findhash(tree, nidx);
  85                 if (!node)
  86                         ;
  87                 else if (atomic_read(&node->refcnt))
  88                         res = 0;
  89                 if (res && node) {
  90                         hfs_bnode_unhash(node);
  91                         hfs_bnode_free(node);
  92                 }
  93                 spin_unlock(&tree->hash_lock);
  94         } else {
  95                 nidx = page->index <<
  96                         (PAGE_CACHE_SHIFT - tree->node_size_shift);
  97                 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
  98                 spin_lock(&tree->hash_lock);
  99                 do {
 100                         node = hfs_bnode_findhash(tree, nidx++);
 101                         if (!node)
 102                                 continue;
 103                         if (atomic_read(&node->refcnt)) {
 104                                 res = 0;
 105                                 break;
 106                         }
 107                         hfs_bnode_unhash(node);
 108                         hfs_bnode_free(node);
 109                 } while (--i && nidx < tree->node_count);
 110                 spin_unlock(&tree->hash_lock);
 111         }
 112         return res ? try_to_free_buffers(page) : 0;
 113 }
 114
 115 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
 116                 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
 117 {
 118         struct file *file = iocb->ki_filp;
 119         struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
 120         ssize_t ret;
 121
 122         ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
 123                                   offset, nr_segs, hfsplus_get_block, NULL);
 124
 125         /*
 126          * In case of error extending write may have instantiated a few
 127          * blocks outside i_size. Trim these off again.
 128          */
 129         if (unlikely((rw & WRITE) && ret < 0)) {
 130                 loff_t isize = i_size_read(inode);
 131                 loff_t end = offset + iov_length(iov, nr_segs);
 132
 133                 if (end > isize)
 134                         vmtruncate(inode, isize);
 135         }
 136
 137         return ret;
 138 }
 139
 140 static int hfsplus_writepages(struct address_space *mapping,
 141                               struct writeback_control *wbc)
 142 {
 143         return mpage_writepages(mapping, wbc, hfsplus_get_block);
 144 }
 145
 146 const struct address_space_operations hfsplus_btree_aops = {
 147         .readpage       = hfsplus_readpage,
 148         .writepage      = hfsplus_writepage,
 149         .write_begin    = hfsplus_write_begin,
 150         .write_end      = generic_write_end,
 151         .bmap           = hfsplus_bmap,
 152         .releasepage    = hfsplus_releasepage,
 153 };
 154
 155 const struct address_space_operations hfsplus_aops = {
 156         .readpage       = hfsplus_readpage,
 157         .writepage      = hfsplus_writepage,
 158         .write_begin    = hfsplus_write_begin,
 159         .write_end      = generic_write_end,
 160         .bmap           = hfsplus_bmap,
 161         .direct_IO      = hfsplus_direct_IO,
 162         .writepages     = hfsplus_writepages,
 163 };
 164
 165 const struct dentry_operations hfsplus_dentry_operations = {
 166         .d_hash       = hfsplus_hash_dentry,
 167         .d_compare    = hfsplus_compare_dentry,
 168 };
 169
 170 static struct dentry *hfsplus_file_lookup(struct inode *dir,
 171                 struct dentry *dentry, struct nameidata *nd)
 172 {
 173         struct hfs_find_data fd;
 174         struct super_block *sb = dir->i_sb;
 175         struct inode *inode = NULL;
 176         struct hfsplus_inode_info *hip;
 177         int err;
 178
 179         if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
 180                 goto out;
 181
 182         inode = HFSPLUS_I(dir)->rsrc_inode;
 183         if (inode)
 184                 goto out;
 185
 186         inode = new_inode(sb);
 187         if (!inode)
 188                 return ERR_PTR(-ENOMEM);
 189
 190         hip = HFSPLUS_I(inode);
 191         inode->i_ino = dir->i_ino;
 192         INIT_LIST_HEAD(&hip->open_dir_list);
 193         mutex_init(&hip->extents_lock);
 194         hip->extent_state = 0;
 195         hip->flags = 0;
 196         set_bit(HFSPLUS_I_RSRC, &hip->flags);
 197
 198         err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
 199         if (!err) {
 200                 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
 201                 if (!err)
 202                         err = hfsplus_cat_read_inode(inode, &fd);
 203                 hfs_find_exit(&fd);
 204         }
 205         if (err) {
 206                 iput(inode);
 207                 return ERR_PTR(err);
 208         }
 209         hip->rsrc_inode = dir;
 210         HFSPLUS_I(dir)->rsrc_inode = inode;
 211         igrab(dir);
 212
 213         /*
 214          * __mark_inode_dirty expects inodes to be hashed.  Since we don't
 215          * want resource fork inodes in the regular inode space, we make them
 216          * appear hashed, but do not put on any lists.  hlist_del()
 217          * will work fine and require no locking.
 218          */
 219         hlist_add_fake(&inode->i_hash);
 220
 221         mark_inode_dirty(inode);
 222 out:
 223         d_add(dentry, inode);
 224         return NULL;
 225 }
 226
 227 static void hfsplus_get_perms(struct inode *inode,
 228                 struct hfsplus_perm *perms, int dir)
 229 {
 230         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 231         u16 mode;
 232
 233         mode = be16_to_cpu(perms->mode);
 234
 235         inode->i_uid = be32_to_cpu(perms->owner);
 236         if (!inode->i_uid && !mode)
 237                 inode->i_uid = sbi->uid;
 238
 239         inode->i_gid = be32_to_cpu(perms->group);
 240         if (!inode->i_gid && !mode)
 241                 inode->i_gid = sbi->gid;
 242
 243         if (dir) {
 244                 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
 245                 mode |= S_IFDIR;
 246         } else if (!mode)
 247                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
 248         inode->i_mode = mode;
 249
 250         HFSPLUS_I(inode)->userflags = perms->userflags;
 251         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
 252                 inode->i_flags |= S_IMMUTABLE;
 253         else
 254                 inode->i_flags &= ~S_IMMUTABLE;
 255         if (perms->rootflags & HFSPLUS_FLG_APPEND)
 256                 inode->i_flags |= S_APPEND;
 257         else
 258                 inode->i_flags &= ~S_APPEND;
 259 }
 260
 261 static int hfsplus_file_open(struct inode *inode, struct file *file)
 262 {
 263         if (HFSPLUS_IS_RSRC(inode))
 264                 inode = HFSPLUS_I(inode)->rsrc_inode;
 265         if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
 266                 return -EOVERFLOW;
 267         atomic_inc(&HFSPLUS_I(inode)->opencnt);
 268         return 0;
 269 }
 270
 271 static int hfsplus_file_release(struct inode *inode, struct file *file)
 272 {
 273         struct super_block *sb = inode->i_sb;
 274
 275         if (HFSPLUS_IS_RSRC(inode))
 276                 inode = HFSPLUS_I(inode)->rsrc_inode;
 277         if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
 278                 mutex_lock(&inode->i_mutex);
 279                 hfsplus_file_truncate(inode);
 280                 if (inode->i_flags & S_DEAD) {
 281                         hfsplus_delete_cat(inode->i_ino,
 282                                            HFSPLUS_SB(sb)->hidden_dir, NULL);
 283                         hfsplus_delete_inode(inode);
 284                 }
 285                 mutex_unlock(&inode->i_mutex);
 286         }
 287         return 0;
 288 }
 289
 290 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 291 {
 292         struct inode *inode = dentry->d_inode;
 293         int error;
 294
 295         error = inode_change_ok(inode, attr);
 296         if (error)
 297                 return error;
 298
 299         if ((attr->ia_valid & ATTR_SIZE) &&
 300             attr->ia_size != i_size_read(inode)) {
 301                 error = vmtruncate(inode, attr->ia_size);
 302                 if (error)
 303                         return error;
 304         }
 305
 306         setattr_copy(inode, attr);
 307         mark_inode_dirty(inode);
 308         return 0;
 309 }
 310
 311 int hfsplus_file_fsync(struct file *file, int datasync)
 312 {
 313         struct inode *inode = file->f_mapping->host;
 314         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 315         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 316         int error = 0, error2;
 317
 318         /*
 319          * Sync inode metadata into the catalog and extent trees.
 320          */
 321         sync_inode_metadata(inode, 1);
 322
 323         /*
 324          * And explicitly write out the btrees.
 325          */
 326         if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
 327                 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
 328
 329         if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
 330                 error2 =
 331                         filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
 332                 if (!error)
 333                         error = error2;
 334         }
 335
 336         if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
 337                 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
 338                 if (!error)
 339                         error = error2;
 340         }
 341
 342         if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
 343                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
 344
 345         return error;
 346 }
 347
 348 static const struct inode_operations hfsplus_file_inode_operations = {
 349         .lookup         = hfsplus_file_lookup,
 350         .truncate       = hfsplus_file_truncate,
 351         .setattr        = hfsplus_setattr,
 352         .setxattr       = hfsplus_setxattr,
 353         .getxattr       = hfsplus_getxattr,
 354         .listxattr      = hfsplus_listxattr,
 355 };
 356
 357 static const struct file_operations hfsplus_file_operations = {
 358         .llseek         = generic_file_llseek,
 359         .read           = do_sync_read,
 360         .aio_read       = generic_file_aio_read,
 361         .write          = do_sync_write,
 362         .aio_write      = generic_file_aio_write,
 363         .mmap           = generic_file_mmap,
 364         .splice_read    = generic_file_splice_read,
 365         .fsync          = hfsplus_file_fsync,
 366         .open           = hfsplus_file_open,
 367         .release        = hfsplus_file_release,
 368         .unlocked_ioctl = hfsplus_ioctl,
 369 };
 370
 371 struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
 372 {
 373         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 374         struct inode *inode = new_inode(sb);
 375         struct hfsplus_inode_info *hip;
 376
 377         if (!inode)
 378                 return NULL;
 379
 380         inode->i_ino = sbi->next_cnid++;
 381         inode->i_mode = mode;
 382         inode->i_uid = current_fsuid();
 383         inode->i_gid = current_fsgid();
 384         inode->i_nlink = 1;
 385         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 386
 387         hip = HFSPLUS_I(inode);
 388         INIT_LIST_HEAD(&hip->open_dir_list);
 389         mutex_init(&hip->extents_lock);
 390         atomic_set(&hip->opencnt, 0);
 391         hip->extent_state = 0;
 392         hip->flags = 0;
 393         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 394         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 395         hip->alloc_blocks = 0;
 396         hip->first_blocks = 0;
 397         hip->cached_start = 0;
 398         hip->cached_blocks = 0;
 399         hip->phys_size = 0;
 400         hip->fs_blocks = 0;
 401         hip->rsrc_inode = NULL;
 402         if (S_ISDIR(inode->i_mode)) {
 403                 inode->i_size = 2;
 404                 sbi->folder_count++;
 405                 inode->i_op = &hfsplus_dir_inode_operations;
 406                 inode->i_fop = &hfsplus_dir_operations;
 407         } else if (S_ISREG(inode->i_mode)) {
 408                 sbi->file_count++;
 409                 inode->i_op = &hfsplus_file_inode_operations;
 410                 inode->i_fop = &hfsplus_file_operations;
 411                 inode->i_mapping->a_ops = &hfsplus_aops;
 412                 hip->clump_blocks = sbi->data_clump_blocks;
 413         } else if (S_ISLNK(inode->i_mode)) {
 414                 sbi->file_count++;
 415                 inode->i_op = &page_symlink_inode_operations;
 416                 inode->i_mapping->a_ops = &hfsplus_aops;
 417                 hip->clump_blocks = 1;
 418         } else
 419                 sbi->file_count++;
 420         insert_inode_hash(inode);
 421         mark_inode_dirty(inode);
 422         sb->s_dirt = 1;
 423
 424         return inode;
 425 }
 426
 427 void hfsplus_delete_inode(struct inode *inode)
 428 {
 429         struct super_block *sb = inode->i_sb;
 430
 431         if (S_ISDIR(inode->i_mode)) {
 432                 HFSPLUS_SB(sb)->folder_count--;
 433                 sb->s_dirt = 1;
 434                 return;
 435         }
 436         HFSPLUS_SB(sb)->file_count--;
 437         if (S_ISREG(inode->i_mode)) {
 438                 if (!inode->i_nlink) {
 439                         inode->i_size = 0;
 440                         hfsplus_file_truncate(inode);
 441                 }
 442         } else if (S_ISLNK(inode->i_mode)) {
 443                 inode->i_size = 0;
 444                 hfsplus_file_truncate(inode);
 445         }
 446         sb->s_dirt = 1;
 447 }
 448
 449 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 450 {
 451         struct super_block *sb = inode->i_sb;
 452         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 453         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 454         u32 count;
 455         int i;
 456
 457         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
 458         for (count = 0, i = 0; i < 8; i++)
 459                 count += be32_to_cpu(fork->extents[i].block_count);
 460         hip->first_blocks = count;
 461         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 462         hip->cached_start = 0;
 463         hip->cached_blocks = 0;
 464
 465         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
 466         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
 467         hip->fs_blocks =
 468                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 469         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
 470         hip->clump_blocks =
 471                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
 472         if (!hip->clump_blocks) {
 473                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
 474                         sbi->rsrc_clump_blocks :
 475                         sbi->data_clump_blocks;
 476         }
 477 }
 478
 479 void hfsplus_inode_write_fork(struct inode *inode,
 480                 struct hfsplus_fork_raw *fork)
 481 {
 482         memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
 483                sizeof(hfsplus_extent_rec));
 484         fork->total_size = cpu_to_be64(inode->i_size);
 485         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
 486 }
 487
 488 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 489 {
 490         hfsplus_cat_entry entry;
 491         int res = 0;
 492         u16 type;
 493
 494         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 495
 496         HFSPLUS_I(inode)->linkid = 0;
 497         if (type == HFSPLUS_FOLDER) {
 498                 struct hfsplus_cat_folder *folder = &entry.folder;
 499
 500                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
 501                         /* panic? */;
 502                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 503                                         sizeof(struct hfsplus_cat_folder));
 504                 hfsplus_get_perms(inode, &folder->permissions, 1);
 505                 inode->i_nlink = 1;
 506                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 507                 inode->i_atime = hfsp_mt2ut(folder->access_date);
 508                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
 509                 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
 510                 HFSPLUS_I(inode)->create_date = folder->create_date;
 511                 HFSPLUS_I(inode)->fs_blocks = 0;
 512                 inode->i_op = &hfsplus_dir_inode_operations;
 513                 inode->i_fop = &hfsplus_dir_operations;
 514         } else if (type == HFSPLUS_FILE) {
 515                 struct hfsplus_cat_file *file = &entry.file;
 516
 517                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 518                         /* panic? */;
 519                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 520                                         sizeof(struct hfsplus_cat_file));
 521
 522                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
 523                                         &file->rsrc_fork : &file->data_fork);
 524                 hfsplus_get_perms(inode, &file->permissions, 0);
 525                 inode->i_nlink = 1;
 526                 if (S_ISREG(inode->i_mode)) {
 527                         if (file->permissions.dev)
 528                                 inode->i_nlink =
 529                                         be32_to_cpu(file->permissions.dev);
 530                         inode->i_op = &hfsplus_file_inode_operations;
 531                         inode->i_fop = &hfsplus_file_operations;
 532                         inode->i_mapping->a_ops = &hfsplus_aops;
 533                 } else if (S_ISLNK(inode->i_mode)) {
 534                         inode->i_op = &page_symlink_inode_operations;
 535                         inode->i_mapping->a_ops = &hfsplus_aops;
 536                 } else {
 537                         init_special_inode(inode, inode->i_mode,
 538                                            be32_to_cpu(file->permissions.dev));
 539                 }
 540                 inode->i_atime = hfsp_mt2ut(file->access_date);
 541                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
 542                 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
 543                 HFSPLUS_I(inode)->create_date = file->create_date;
 544         } else {
 545                 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
 546                 res = -EIO;
 547         }
 548         return res;
 549 }
 550
 551 int hfsplus_cat_write_inode(struct inode *inode)
 552 {
 553         struct inode *main_inode = inode;
 554         struct hfs_find_data fd;
 555         hfsplus_cat_entry entry;
 556
 557         if (HFSPLUS_IS_RSRC(inode))
 558                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
 559
 560         if (!main_inode->i_nlink)
 561                 return 0;
 562
 563         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
 564                 /* panic? */
 565                 return -EIO;
 566
 567         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 568                 /* panic? */
 569                 goto out;
 570
 571         if (S_ISDIR(main_inode->i_mode)) {
 572                 struct hfsplus_cat_folder *folder = &entry.folder;
 573
 574                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 575                         /* panic? */;
 576                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 577                                         sizeof(struct hfsplus_cat_folder));
 578                 /* simple node checks? */
 579                 hfsplus_cat_set_perms(inode, &folder->permissions);
 580                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 581                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 582                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 583                 folder->valence = cpu_to_be32(inode->i_size - 2);
 584                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 585                                          sizeof(struct hfsplus_cat_folder));
 586         } else if (HFSPLUS_IS_RSRC(inode)) {
 587                 struct hfsplus_cat_file *file = &entry.file;
 588                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 589                                sizeof(struct hfsplus_cat_file));
 590                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 591                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 592                                 sizeof(struct hfsplus_cat_file));
 593         } else {
 594                 struct hfsplus_cat_file *file = &entry.file;
 595
 596                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 597                         /* panic? */;
 598                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 599                                         sizeof(struct hfsplus_cat_file));
 600                 hfsplus_inode_write_fork(inode, &file->data_fork);
 601                 hfsplus_cat_set_perms(inode, &file->permissions);
 602                 if (HFSPLUS_FLG_IMMUTABLE &
 603                                 (file->permissions.rootflags |
 604                                         file->permissions.userflags))
 605                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 606                 else
 607                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 608                 file->access_date = hfsp_ut2mt(inode->i_atime);
 609                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 610                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 611                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 612                                          sizeof(struct hfsplus_cat_file));
 613         }
 614
 615         set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
 616 out:
 617         hfs_find_exit(&fd);
 618         return 0;
 619 }