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/mpage.h>
  15 #include <linux/sched.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         return block_read_full_page(page, hfsplus_get_block);
  23 }
  24
  25 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
  26 {
  27         return block_write_full_page(page, hfsplus_get_block, wbc);
  28 }
  29
  30 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
  31                         loff_t pos, unsigned len, unsigned flags,
  32                         struct page **pagep, void **fsdata)
  33 {
  34         int ret;
  35
  36         *pagep = NULL;
  37         ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
  38                                 hfsplus_get_block,
  39                                 &HFSPLUS_I(mapping->host)->phys_size);
  40         if (unlikely(ret)) {
  41                 loff_t isize = mapping->host->i_size;
  42                 if (pos + len > isize)
  43                         vmtruncate(mapping->host, isize);
  44         }
  45
  46         return ret;
  47 }
  48
  49 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  50 {
  51         return generic_block_bmap(mapping, block, hfsplus_get_block);
  52 }
  53
  54 static int hfsplus_releasepage(struct page *page, gfp_t mask)
  55 {
  56         struct inode *inode = page->mapping->host;
  57         struct super_block *sb = inode->i_sb;
  58         struct hfs_btree *tree;
  59         struct hfs_bnode *node;
  60         u32 nidx;
  61         int i, res = 1;
  62
  63         switch (inode->i_ino) {
  64         case HFSPLUS_EXT_CNID:
  65                 tree = HFSPLUS_SB(sb)->ext_tree;
  66                 break;
  67         case HFSPLUS_CAT_CNID:
  68                 tree = HFSPLUS_SB(sb)->cat_tree;
  69                 break;
  70         case HFSPLUS_ATTR_CNID:
  71                 tree = HFSPLUS_SB(sb)->attr_tree;
  72                 break;
  73         default:
  74                 BUG();
  75                 return 0;
  76         }
  77         if (!tree)
  78                 return 0;
  79         if (tree->node_size >= PAGE_CACHE_SIZE) {
  80                 nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
  81                 spin_lock(&tree->hash_lock);
  82                 node = hfs_bnode_findhash(tree, nidx);
  83                 if (!node)
  84                         ;
  85                 else if (atomic_read(&node->refcnt))
  86                         res = 0;
  87                 if (res && node) {
  88                         hfs_bnode_unhash(node);
  89                         hfs_bnode_free(node);
  90                 }
  91                 spin_unlock(&tree->hash_lock);
  92         } else {
  93                 nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
  94                 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
  95                 spin_lock(&tree->hash_lock);
  96                 do {
  97                         node = hfs_bnode_findhash(tree, nidx++);
  98                         if (!node)
  99                                 continue;
 100                         if (atomic_read(&node->refcnt)) {
 101                                 res = 0;
 102                                 break;
 103                         }
 104                         hfs_bnode_unhash(node);
 105                         hfs_bnode_free(node);
 106                 } while (--i && nidx < tree->node_count);
 107                 spin_unlock(&tree->hash_lock);
 108         }
 109         return res ? try_to_free_buffers(page) : 0;
 110 }
 111
 112 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
 113                 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
 114 {
 115         struct file *file = iocb->ki_filp;
 116         struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
 117         ssize_t ret;
 118
 119         ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
 120                                   offset, nr_segs, hfsplus_get_block, NULL);
 121
 122         /*
 123          * In case of error extending write may have instantiated a few
 124          * blocks outside i_size. Trim these off again.
 125          */
 126         if (unlikely((rw & WRITE) && ret < 0)) {
 127                 loff_t isize = i_size_read(inode);
 128                 loff_t end = offset + iov_length(iov, nr_segs);
 129
 130                 if (end > isize)
 131                         vmtruncate(inode, isize);
 132         }
 133
 134         return ret;
 135 }
 136
 137 static int hfsplus_writepages(struct address_space *mapping,
 138                               struct writeback_control *wbc)
 139 {
 140         return mpage_writepages(mapping, wbc, hfsplus_get_block);
 141 }
 142
 143 const struct address_space_operations hfsplus_btree_aops = {
 144         .readpage       = hfsplus_readpage,
 145         .writepage      = hfsplus_writepage,
 146         .sync_page      = block_sync_page,
 147         .write_begin    = hfsplus_write_begin,
 148         .write_end      = generic_write_end,
 149         .bmap           = hfsplus_bmap,
 150         .releasepage    = hfsplus_releasepage,
 151 };
 152
 153 const struct address_space_operations hfsplus_aops = {
 154         .readpage       = hfsplus_readpage,
 155         .writepage      = hfsplus_writepage,
 156         .sync_page      = block_sync_page,
 157         .write_begin    = hfsplus_write_begin,
 158         .write_end      = generic_write_end,
 159         .bmap           = hfsplus_bmap,
 160         .direct_IO      = hfsplus_direct_IO,
 161         .writepages     = hfsplus_writepages,
 162 };
 163
 164 const struct dentry_operations hfsplus_dentry_operations = {
 165         .d_hash       = hfsplus_hash_dentry,
 166         .d_compare    = hfsplus_compare_dentry,
 167 };
 168
 169 static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry,
 170                                           struct nameidata *nd)
 171 {
 172         struct hfs_find_data fd;
 173         struct super_block *sb = dir->i_sb;
 174         struct inode *inode = NULL;
 175         struct hfsplus_inode_info *hip;
 176         int err;
 177
 178         if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
 179                 goto out;
 180
 181         inode = HFSPLUS_I(dir)->rsrc_inode;
 182         if (inode)
 183                 goto out;
 184
 185         inode = new_inode(sb);
 186         if (!inode)
 187                 return ERR_PTR(-ENOMEM);
 188
 189         hip = HFSPLUS_I(inode);
 190         inode->i_ino = dir->i_ino;
 191         INIT_LIST_HEAD(&hip->open_dir_list);
 192         mutex_init(&hip->extents_lock);
 193         hip->flags = HFSPLUS_FLG_RSRC;
 194
 195         hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
 196         err = hfsplus_find_cat(sb, dir->i_ino, &fd);
 197         if (!err)
 198                 err = hfsplus_cat_read_inode(inode, &fd);
 199         hfs_find_exit(&fd);
 200         if (err) {
 201                 iput(inode);
 202                 return ERR_PTR(err);
 203         }
 204         hip->rsrc_inode = dir;
 205         HFSPLUS_I(dir)->rsrc_inode = inode;
 206         igrab(dir);
 207
 208         /*
 209          * __mark_inode_dirty expects inodes to be hashed.  Since we don't
 210          * want resource fork inodes in the regular inode space, we make them
 211          * appear hashed, but do not put on any lists.  hlist_del()
 212          * will work fine and require no locking.
 213          */
 214         inode->i_hash.pprev = &inode->i_hash.next;
 215
 216         mark_inode_dirty(inode);
 217 out:
 218         d_add(dentry, inode);
 219         return NULL;
 220 }
 221
 222 static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
 223 {
 224         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 225         u16 mode;
 226
 227         mode = be16_to_cpu(perms->mode);
 228
 229         inode->i_uid = be32_to_cpu(perms->owner);
 230         if (!inode->i_uid && !mode)
 231                 inode->i_uid = sbi->uid;
 232
 233         inode->i_gid = be32_to_cpu(perms->group);
 234         if (!inode->i_gid && !mode)
 235                 inode->i_gid = sbi->gid;
 236
 237         if (dir) {
 238                 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
 239                 mode |= S_IFDIR;
 240         } else if (!mode)
 241                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
 242         inode->i_mode = mode;
 243
 244         HFSPLUS_I(inode)->userflags = perms->userflags;
 245         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
 246                 inode->i_flags |= S_IMMUTABLE;
 247         else
 248                 inode->i_flags &= ~S_IMMUTABLE;
 249         if (perms->rootflags & HFSPLUS_FLG_APPEND)
 250                 inode->i_flags |= S_APPEND;
 251         else
 252                 inode->i_flags &= ~S_APPEND;
 253 }
 254
 255 static int hfsplus_file_open(struct inode *inode, struct file *file)
 256 {
 257         if (HFSPLUS_IS_RSRC(inode))
 258                 inode = HFSPLUS_I(inode)->rsrc_inode;
 259         if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
 260                 return -EOVERFLOW;
 261         atomic_inc(&HFSPLUS_I(inode)->opencnt);
 262         return 0;
 263 }
 264
 265 static int hfsplus_file_release(struct inode *inode, struct file *file)
 266 {
 267         struct super_block *sb = inode->i_sb;
 268
 269         if (HFSPLUS_IS_RSRC(inode))
 270                 inode = HFSPLUS_I(inode)->rsrc_inode;
 271         if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
 272                 mutex_lock(&inode->i_mutex);
 273                 hfsplus_file_truncate(inode);
 274                 if (inode->i_flags & S_DEAD) {
 275                         hfsplus_delete_cat(inode->i_ino,
 276                                            HFSPLUS_SB(sb)->hidden_dir, NULL);
 277                         hfsplus_delete_inode(inode);
 278                 }
 279                 mutex_unlock(&inode->i_mutex);
 280         }
 281         return 0;
 282 }
 283
 284 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 285 {
 286         struct inode *inode = dentry->d_inode;
 287         int error;
 288
 289         error = inode_change_ok(inode, attr);
 290         if (error)
 291                 return error;
 292
 293         if ((attr->ia_valid & ATTR_SIZE) &&
 294             attr->ia_size != i_size_read(inode)) {
 295                 error = vmtruncate(inode, attr->ia_size);
 296                 if (error)
 297                         return error;
 298         }
 299
 300         setattr_copy(inode, attr);
 301         mark_inode_dirty(inode);
 302         return 0;
 303 }
 304
 305 static int hfsplus_file_fsync(struct file *filp, int datasync)
 306 {
 307         struct inode *inode = filp->f_mapping->host;
 308         struct super_block * sb;
 309         int ret, err;
 310
 311         /* sync the inode to buffers */
 312         ret = write_inode_now(inode, 0);
 313
 314         /* sync the superblock to buffers */
 315         sb = inode->i_sb;
 316         if (sb->s_dirt) {
 317                 if (!(sb->s_flags & MS_RDONLY))
 318                         hfsplus_sync_fs(sb, 1);
 319                 else
 320                         sb->s_dirt = 0;
 321         }
 322
 323         /* .. finally sync the buffers to disk */
 324         err = sync_blockdev(sb->s_bdev);
 325         if (!ret)
 326                 ret = err;
 327         return ret;
 328 }
 329
 330 static const struct inode_operations hfsplus_file_inode_operations = {
 331         .lookup         = hfsplus_file_lookup,
 332         .truncate       = hfsplus_file_truncate,
 333         .setattr        = hfsplus_setattr,
 334         .setxattr       = hfsplus_setxattr,
 335         .getxattr       = hfsplus_getxattr,
 336         .listxattr      = hfsplus_listxattr,
 337 };
 338
 339 static const struct file_operations hfsplus_file_operations = {
 340         .llseek         = generic_file_llseek,
 341         .read           = do_sync_read,
 342         .aio_read       = generic_file_aio_read,
 343         .write          = do_sync_write,
 344         .aio_write      = generic_file_aio_write,
 345         .mmap           = generic_file_mmap,
 346         .splice_read    = generic_file_splice_read,
 347         .fsync          = hfsplus_file_fsync,
 348         .open           = hfsplus_file_open,
 349         .release        = hfsplus_file_release,
 350         .unlocked_ioctl = hfsplus_ioctl,
 351 };
 352
 353 struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
 354 {
 355         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 356         struct inode *inode = new_inode(sb);
 357         struct hfsplus_inode_info *hip;
 358
 359         if (!inode)
 360                 return NULL;
 361
 362         inode->i_ino = sbi->next_cnid++;
 363         inode->i_mode = mode;
 364         inode->i_uid = current_fsuid();
 365         inode->i_gid = current_fsgid();
 366         inode->i_nlink = 1;
 367         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 368
 369         hip = HFSPLUS_I(inode);
 370         INIT_LIST_HEAD(&hip->open_dir_list);
 371         mutex_init(&hip->extents_lock);
 372         atomic_set(&hip->opencnt, 0);
 373         hip->flags = 0;
 374         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 375         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 376         hip->alloc_blocks = 0;
 377         hip->first_blocks = 0;
 378         hip->cached_start = 0;
 379         hip->cached_blocks = 0;
 380         hip->phys_size = 0;
 381         hip->fs_blocks = 0;
 382         hip->rsrc_inode = NULL;
 383         if (S_ISDIR(inode->i_mode)) {
 384                 inode->i_size = 2;
 385                 sbi->folder_count++;
 386                 inode->i_op = &hfsplus_dir_inode_operations;
 387                 inode->i_fop = &hfsplus_dir_operations;
 388         } else if (S_ISREG(inode->i_mode)) {
 389                 sbi->file_count++;
 390                 inode->i_op = &hfsplus_file_inode_operations;
 391                 inode->i_fop = &hfsplus_file_operations;
 392                 inode->i_mapping->a_ops = &hfsplus_aops;
 393                 hip->clump_blocks = sbi->data_clump_blocks;
 394         } else if (S_ISLNK(inode->i_mode)) {
 395                 sbi->file_count++;
 396                 inode->i_op = &page_symlink_inode_operations;
 397                 inode->i_mapping->a_ops = &hfsplus_aops;
 398                 hip->clump_blocks = 1;
 399         } else
 400                 sbi->file_count++;
 401         insert_inode_hash(inode);
 402         mark_inode_dirty(inode);
 403         sb->s_dirt = 1;
 404
 405         return inode;
 406 }
 407
 408 void hfsplus_delete_inode(struct inode *inode)
 409 {
 410         struct super_block *sb = inode->i_sb;
 411
 412         if (S_ISDIR(inode->i_mode)) {
 413                 HFSPLUS_SB(sb)->folder_count--;
 414                 sb->s_dirt = 1;
 415                 return;
 416         }
 417         HFSPLUS_SB(sb)->file_count--;
 418         if (S_ISREG(inode->i_mode)) {
 419                 if (!inode->i_nlink) {
 420                         inode->i_size = 0;
 421                         hfsplus_file_truncate(inode);
 422                 }
 423         } else if (S_ISLNK(inode->i_mode)) {
 424                 inode->i_size = 0;
 425                 hfsplus_file_truncate(inode);
 426         }
 427         sb->s_dirt = 1;
 428 }
 429
 430 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 431 {
 432         struct super_block *sb = inode->i_sb;
 433         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 434         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 435         u32 count;
 436         int i;
 437
 438         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
 439         for (count = 0, i = 0; i < 8; i++)
 440                 count += be32_to_cpu(fork->extents[i].block_count);
 441         hip->first_blocks = count;
 442         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 443         hip->cached_start = 0;
 444         hip->cached_blocks = 0;
 445
 446         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
 447         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
 448         hip->fs_blocks =
 449                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 450         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
 451         hip->clump_blocks =
 452                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
 453         if (!hip->clump_blocks) {
 454                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
 455                         sbi->rsrc_clump_blocks :
 456                         sbi->data_clump_blocks;
 457         }
 458 }
 459
 460 void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 461 {
 462         memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
 463                sizeof(hfsplus_extent_rec));
 464         fork->total_size = cpu_to_be64(inode->i_size);
 465         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
 466 }
 467
 468 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 469 {
 470         hfsplus_cat_entry entry;
 471         int res = 0;
 472         u16 type;
 473
 474         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 475
 476         HFSPLUS_I(inode)->linkid = 0;
 477         if (type == HFSPLUS_FOLDER) {
 478                 struct hfsplus_cat_folder *folder = &entry.folder;
 479
 480                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
 481                         /* panic? */;
 482                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 483                                         sizeof(struct hfsplus_cat_folder));
 484                 hfsplus_get_perms(inode, &folder->permissions, 1);
 485                 inode->i_nlink = 1;
 486                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 487                 inode->i_atime = hfsp_mt2ut(folder->access_date);
 488                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
 489                 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
 490                 HFSPLUS_I(inode)->create_date = folder->create_date;
 491                 HFSPLUS_I(inode)->fs_blocks = 0;
 492                 inode->i_op = &hfsplus_dir_inode_operations;
 493                 inode->i_fop = &hfsplus_dir_operations;
 494         } else if (type == HFSPLUS_FILE) {
 495                 struct hfsplus_cat_file *file = &entry.file;
 496
 497                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 498                         /* panic? */;
 499                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 500                                         sizeof(struct hfsplus_cat_file));
 501
 502                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ?
 503                                         &file->data_fork : &file->rsrc_fork);
 504                 hfsplus_get_perms(inode, &file->permissions, 0);
 505                 inode->i_nlink = 1;
 506                 if (S_ISREG(inode->i_mode)) {
 507                         if (file->permissions.dev)
 508                                 inode->i_nlink = be32_to_cpu(file->permissions.dev);
 509                         inode->i_op = &hfsplus_file_inode_operations;
 510                         inode->i_fop = &hfsplus_file_operations;
 511                         inode->i_mapping->a_ops = &hfsplus_aops;
 512                 } else if (S_ISLNK(inode->i_mode)) {
 513                         inode->i_op = &page_symlink_inode_operations;
 514                         inode->i_mapping->a_ops = &hfsplus_aops;
 515                 } else {
 516                         init_special_inode(inode, inode->i_mode,
 517                                            be32_to_cpu(file->permissions.dev));
 518                 }
 519                 inode->i_atime = hfsp_mt2ut(file->access_date);
 520                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
 521                 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
 522                 HFSPLUS_I(inode)->create_date = file->create_date;
 523         } else {
 524                 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
 525                 res = -EIO;
 526         }
 527         return res;
 528 }
 529
 530 int hfsplus_cat_write_inode(struct inode *inode)
 531 {
 532         struct inode *main_inode = inode;
 533         struct hfs_find_data fd;
 534         hfsplus_cat_entry entry;
 535
 536         if (HFSPLUS_IS_RSRC(inode))
 537                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
 538
 539         if (!main_inode->i_nlink)
 540                 return 0;
 541
 542         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
 543                 /* panic? */
 544                 return -EIO;
 545
 546         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 547                 /* panic? */
 548                 goto out;
 549
 550         if (S_ISDIR(main_inode->i_mode)) {
 551                 struct hfsplus_cat_folder *folder = &entry.folder;
 552
 553                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 554                         /* panic? */;
 555                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 556                                         sizeof(struct hfsplus_cat_folder));
 557                 /* simple node checks? */
 558                 hfsplus_cat_set_perms(inode, &folder->permissions);
 559                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 560                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 561                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 562                 folder->valence = cpu_to_be32(inode->i_size - 2);
 563                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 564                                          sizeof(struct hfsplus_cat_folder));
 565         } else if (HFSPLUS_IS_RSRC(inode)) {
 566                 struct hfsplus_cat_file *file = &entry.file;
 567                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 568                                sizeof(struct hfsplus_cat_file));
 569                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 570                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 571                                 sizeof(struct hfsplus_cat_file));
 572         } else {
 573                 struct hfsplus_cat_file *file = &entry.file;
 574
 575                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 576                         /* panic? */;
 577                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 578                                         sizeof(struct hfsplus_cat_file));
 579                 hfsplus_inode_write_fork(inode, &file->data_fork);
 580                 hfsplus_cat_set_perms(inode, &file->permissions);
 581                 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
 582                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 583                 else
 584                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 585                 file->access_date = hfsp_ut2mt(inode->i_atime);
 586                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 587                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 588                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 589                                          sizeof(struct hfsplus_cat_file));
 590         }
 591 out:
 592         hfs_find_exit(&fd);
 593         return 0;
 594 }