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