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