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 #include <linux/aio.h>
  18
  19 #include "hfsplus_fs.h"
  20 #include "hfsplus_raw.h"
  21 #include "xattr.h"
  22 #include "acl.h"
  23
  24 static int hfsplus_readpage(struct file *file, struct page *page)
  25 {
  26         return block_read_full_page(page, hfsplus_get_block);
  27 }
  28
  29 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
  30 {
  31         return block_write_full_page(page, hfsplus_get_block, wbc);
  32 }
  33
  34 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
  35 {
  36         struct inode *inode = mapping->host;
  37
  38         if (to > inode->i_size) {
  39                 truncate_pagecache(inode, inode->i_size);
  40                 hfsplus_file_truncate(inode);
  41         }
  42 }
  43
  44 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
  45                         loff_t pos, unsigned len, unsigned flags,
  46                         struct page **pagep, void **fsdata)
  47 {
  48         int ret;
  49
  50         *pagep = NULL;
  51         ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
  52                                 hfsplus_get_block,
  53                                 &HFSPLUS_I(mapping->host)->phys_size);
  54         if (unlikely(ret))
  55                 hfsplus_write_failed(mapping, pos + len);
  56
  57         return ret;
  58 }
  59
  60 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  61 {
  62         return generic_block_bmap(mapping, block, hfsplus_get_block);
  63 }
  64
  65 static int hfsplus_releasepage(struct page *page, gfp_t mask)
  66 {
  67         struct inode *inode = page->mapping->host;
  68         struct super_block *sb = inode->i_sb;
  69         struct hfs_btree *tree;
  70         struct hfs_bnode *node;
  71         u32 nidx;
  72         int i, res = 1;
  73
  74         switch (inode->i_ino) {
  75         case HFSPLUS_EXT_CNID:
  76                 tree = HFSPLUS_SB(sb)->ext_tree;
  77                 break;
  78         case HFSPLUS_CAT_CNID:
  79                 tree = HFSPLUS_SB(sb)->cat_tree;
  80                 break;
  81         case HFSPLUS_ATTR_CNID:
  82                 tree = HFSPLUS_SB(sb)->attr_tree;
  83                 break;
  84         default:
  85                 BUG();
  86                 return 0;
  87         }
  88         if (!tree)
  89                 return 0;
  90         if (tree->node_size >= PAGE_CACHE_SIZE) {
  91                 nidx = page->index >>
  92                         (tree->node_size_shift - PAGE_CACHE_SHIFT);
  93                 spin_lock(&tree->hash_lock);
  94                 node = hfs_bnode_findhash(tree, nidx);
  95                 if (!node)
  96                         ;
  97                 else if (atomic_read(&node->refcnt))
  98                         res = 0;
  99                 if (res && node) {
 100                         hfs_bnode_unhash(node);
 101                         hfs_bnode_free(node);
 102                 }
 103                 spin_unlock(&tree->hash_lock);
 104         } else {
 105                 nidx = page->index <<
 106                         (PAGE_CACHE_SHIFT - tree->node_size_shift);
 107                 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
 108                 spin_lock(&tree->hash_lock);
 109                 do {
 110                         node = hfs_bnode_findhash(tree, nidx++);
 111                         if (!node)
 112                                 continue;
 113                         if (atomic_read(&node->refcnt)) {
 114                                 res = 0;
 115                                 break;
 116                         }
 117                         hfs_bnode_unhash(node);
 118                         hfs_bnode_free(node);
 119                 } while (--i && nidx < tree->node_count);
 120                 spin_unlock(&tree->hash_lock);
 121         }
 122         return res ? try_to_free_buffers(page) : 0;
 123 }
 124
 125 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
 126                 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
 127 {
 128         struct file *file = iocb->ki_filp;
 129         struct address_space *mapping = file->f_mapping;
 130         struct inode *inode = file_inode(file)->i_mapping->host;
 131         ssize_t ret;
 132
 133         ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
 134                                  hfsplus_get_block);
 135
 136         /*
 137          * In case of error extending write may have instantiated a few
 138          * blocks outside i_size. Trim these off again.
 139          */
 140         if (unlikely((rw & WRITE) && ret < 0)) {
 141                 loff_t isize = i_size_read(inode);
 142                 loff_t end = offset + iov_length(iov, nr_segs);
 143
 144                 if (end > isize)
 145                         hfsplus_write_failed(mapping, end);
 146         }
 147
 148         return ret;
 149 }
 150
 151 static int hfsplus_writepages(struct address_space *mapping,
 152                               struct writeback_control *wbc)
 153 {
 154         return mpage_writepages(mapping, wbc, hfsplus_get_block);
 155 }
 156
 157 const struct address_space_operations hfsplus_btree_aops = {
 158         .readpage       = hfsplus_readpage,
 159         .writepage      = hfsplus_writepage,
 160         .write_begin    = hfsplus_write_begin,
 161         .write_end      = generic_write_end,
 162         .bmap           = hfsplus_bmap,
 163         .releasepage    = hfsplus_releasepage,
 164 };
 165
 166 const struct address_space_operations hfsplus_aops = {
 167         .readpage       = hfsplus_readpage,
 168         .writepage      = hfsplus_writepage,
 169         .write_begin    = hfsplus_write_begin,
 170         .write_end      = generic_write_end,
 171         .bmap           = hfsplus_bmap,
 172         .direct_IO      = hfsplus_direct_IO,
 173         .writepages     = hfsplus_writepages,
 174 };
 175
 176 const struct dentry_operations hfsplus_dentry_operations = {
 177         .d_hash       = hfsplus_hash_dentry,
 178         .d_compare    = hfsplus_compare_dentry,
 179 };
 180
 181 static void hfsplus_get_perms(struct inode *inode,
 182                 struct hfsplus_perm *perms, int dir)
 183 {
 184         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 185         u16 mode;
 186
 187         mode = be16_to_cpu(perms->mode);
 188
 189         i_uid_write(inode, be32_to_cpu(perms->owner));
 190         if (!i_uid_read(inode) && !mode)
 191                 inode->i_uid = sbi->uid;
 192
 193         i_gid_write(inode, be32_to_cpu(perms->group));
 194         if (!i_gid_read(inode) && !mode)
 195                 inode->i_gid = sbi->gid;
 196
 197         if (dir) {
 198                 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
 199                 mode |= S_IFDIR;
 200         } else if (!mode)
 201                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
 202         inode->i_mode = mode;
 203
 204         HFSPLUS_I(inode)->userflags = perms->userflags;
 205         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
 206                 inode->i_flags |= S_IMMUTABLE;
 207         else
 208                 inode->i_flags &= ~S_IMMUTABLE;
 209         if (perms->rootflags & HFSPLUS_FLG_APPEND)
 210                 inode->i_flags |= S_APPEND;
 211         else
 212                 inode->i_flags &= ~S_APPEND;
 213 }
 214
 215 static int hfsplus_file_open(struct inode *inode, struct file *file)
 216 {
 217         if (HFSPLUS_IS_RSRC(inode))
 218                 inode = HFSPLUS_I(inode)->rsrc_inode;
 219         if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
 220                 return -EOVERFLOW;
 221         atomic_inc(&HFSPLUS_I(inode)->opencnt);
 222         return 0;
 223 }
 224
 225 static int hfsplus_file_release(struct inode *inode, struct file *file)
 226 {
 227         struct super_block *sb = inode->i_sb;
 228
 229         if (HFSPLUS_IS_RSRC(inode))
 230                 inode = HFSPLUS_I(inode)->rsrc_inode;
 231         if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
 232                 mutex_lock(&inode->i_mutex);
 233                 hfsplus_file_truncate(inode);
 234                 if (inode->i_flags & S_DEAD) {
 235                         hfsplus_delete_cat(inode->i_ino,
 236                                            HFSPLUS_SB(sb)->hidden_dir, NULL);
 237                         hfsplus_delete_inode(inode);
 238                 }
 239                 mutex_unlock(&inode->i_mutex);
 240         }
 241         return 0;
 242 }
 243
 244 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 245 {
 246         struct inode *inode = dentry->d_inode;
 247         int error;
 248
 249         error = inode_change_ok(inode, attr);
 250         if (error)
 251                 return error;
 252
 253         if ((attr->ia_valid & ATTR_SIZE) &&
 254             attr->ia_size != i_size_read(inode)) {
 255                 inode_dio_wait(inode);
 256                 truncate_setsize(inode, attr->ia_size);
 257                 hfsplus_file_truncate(inode);
 258         }
 259
 260         setattr_copy(inode, attr);
 261         mark_inode_dirty(inode);
 262
 263         if (attr->ia_valid & ATTR_MODE) {
 264                 error = posix_acl_chmod(inode, inode->i_mode);
 265                 if (unlikely(error))
 266                         return error;
 267         }
 268
 269         return 0;
 270 }
 271
 272 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 273                        int datasync)
 274 {
 275         struct inode *inode = file->f_mapping->host;
 276         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 277         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 278         int error = 0, error2;
 279
 280         error = filemap_write_and_wait_range(inode->i_mapping, start, end);
 281         if (error)
 282                 return error;
 283         mutex_lock(&inode->i_mutex);
 284
 285         /*
 286          * Sync inode metadata into the catalog and extent trees.
 287          */
 288         sync_inode_metadata(inode, 1);
 289
 290         /*
 291          * And explicitly write out the btrees.
 292          */
 293         if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
 294                 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
 295
 296         if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
 297                 error2 =
 298                         filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
 299                 if (!error)
 300                         error = error2;
 301         }
 302
 303         if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
 304                 if (sbi->attr_tree) {
 305                         error2 =
 306                                 filemap_write_and_wait(
 307                                             sbi->attr_tree->inode->i_mapping);
 308                         if (!error)
 309                                 error = error2;
 310                 } else {
 311                         pr_err("sync non-existent attributes tree\n");
 312                 }
 313         }
 314
 315         if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
 316                 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
 317                 if (!error)
 318                         error = error2;
 319         }
 320
 321         if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
 322                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
 323
 324         mutex_unlock(&inode->i_mutex);
 325
 326         return error;
 327 }
 328
 329 static const struct inode_operations hfsplus_file_inode_operations = {
 330         .setattr        = hfsplus_setattr,
 331         .setxattr       = generic_setxattr,
 332         .getxattr       = generic_getxattr,
 333         .listxattr      = hfsplus_listxattr,
 334         .removexattr    = generic_removexattr,
 335 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
 336         .get_acl        = hfsplus_get_posix_acl,
 337         .set_acl        = hfsplus_set_posix_acl,
 338 #endif
 339 };
 340
 341 static const struct file_operations hfsplus_file_operations = {
 342         .llseek         = generic_file_llseek,
 343         .read           = do_sync_read,
 344         .aio_read       = generic_file_aio_read,
 345         .write          = do_sync_write,
 346         .aio_write      = generic_file_aio_write,
 347         .mmap           = generic_file_mmap,
 348         .splice_read    = generic_file_splice_read,
 349         .fsync          = hfsplus_file_fsync,
 350         .open           = hfsplus_file_open,
 351         .release        = hfsplus_file_release,
 352         .unlocked_ioctl = hfsplus_ioctl,
 353 };
 354
 355 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
 356 {
 357         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 358         struct inode *inode = new_inode(sb);
 359         struct hfsplus_inode_info *hip;
 360
 361         if (!inode)
 362                 return NULL;
 363
 364         inode->i_ino = sbi->next_cnid++;
 365         inode->i_mode = mode;
 366         inode->i_uid = current_fsuid();
 367         inode->i_gid = current_fsgid();
 368         set_nlink(inode, 1);
 369         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 370
 371         hip = HFSPLUS_I(inode);
 372         INIT_LIST_HEAD(&hip->open_dir_list);
 373         mutex_init(&hip->extents_lock);
 374         atomic_set(&hip->opencnt, 0);
 375         hip->extent_state = 0;
 376         hip->flags = 0;
 377         hip->userflags = 0;
 378         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 379         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 380         hip->alloc_blocks = 0;
 381         hip->first_blocks = 0;
 382         hip->cached_start = 0;
 383         hip->cached_blocks = 0;
 384         hip->phys_size = 0;
 385         hip->fs_blocks = 0;
 386         hip->rsrc_inode = NULL;
 387         if (S_ISDIR(inode->i_mode)) {
 388                 inode->i_size = 2;
 389                 sbi->folder_count++;
 390                 inode->i_op = &hfsplus_dir_inode_operations;
 391                 inode->i_fop = &hfsplus_dir_operations;
 392         } else if (S_ISREG(inode->i_mode)) {
 393                 sbi->file_count++;
 394                 inode->i_op = &hfsplus_file_inode_operations;
 395                 inode->i_fop = &hfsplus_file_operations;
 396                 inode->i_mapping->a_ops = &hfsplus_aops;
 397                 hip->clump_blocks = sbi->data_clump_blocks;
 398         } else if (S_ISLNK(inode->i_mode)) {
 399                 sbi->file_count++;
 400                 inode->i_op = &page_symlink_inode_operations;
 401                 inode->i_mapping->a_ops = &hfsplus_aops;
 402                 hip->clump_blocks = 1;
 403         } else
 404                 sbi->file_count++;
 405         insert_inode_hash(inode);
 406         mark_inode_dirty(inode);
 407         hfsplus_mark_mdb_dirty(sb);
 408
 409         return inode;
 410 }
 411
 412 void hfsplus_delete_inode(struct inode *inode)
 413 {
 414         struct super_block *sb = inode->i_sb;
 415
 416         if (S_ISDIR(inode->i_mode)) {
 417                 HFSPLUS_SB(sb)->folder_count--;
 418                 hfsplus_mark_mdb_dirty(sb);
 419                 return;
 420         }
 421         HFSPLUS_SB(sb)->file_count--;
 422         if (S_ISREG(inode->i_mode)) {
 423                 if (!inode->i_nlink) {
 424                         inode->i_size = 0;
 425                         hfsplus_file_truncate(inode);
 426                 }
 427         } else if (S_ISLNK(inode->i_mode)) {
 428                 inode->i_size = 0;
 429                 hfsplus_file_truncate(inode);
 430         }
 431         hfsplus_mark_mdb_dirty(sb);
 432 }
 433
 434 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 435 {
 436         struct super_block *sb = inode->i_sb;
 437         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 438         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 439         u32 count;
 440         int i;
 441
 442         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
 443         for (count = 0, i = 0; i < 8; i++)
 444                 count += be32_to_cpu(fork->extents[i].block_count);
 445         hip->first_blocks = count;
 446         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 447         hip->cached_start = 0;
 448         hip->cached_blocks = 0;
 449
 450         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
 451         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
 452         hip->fs_blocks =
 453                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 454         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
 455         hip->clump_blocks =
 456                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
 457         if (!hip->clump_blocks) {
 458                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
 459                         sbi->rsrc_clump_blocks :
 460                         sbi->data_clump_blocks;
 461         }
 462 }
 463
 464 void hfsplus_inode_write_fork(struct inode *inode,
 465                 struct hfsplus_fork_raw *fork)
 466 {
 467         memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
 468                sizeof(hfsplus_extent_rec));
 469         fork->total_size = cpu_to_be64(inode->i_size);
 470         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
 471 }
 472
 473 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 474 {
 475         hfsplus_cat_entry entry;
 476         int res = 0;
 477         u16 type;
 478
 479         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 480
 481         HFSPLUS_I(inode)->linkid = 0;
 482         if (type == HFSPLUS_FOLDER) {
 483                 struct hfsplus_cat_folder *folder = &entry.folder;
 484
 485                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
 486                         /* panic? */;
 487                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 488                                         sizeof(struct hfsplus_cat_folder));
 489                 hfsplus_get_perms(inode, &folder->permissions, 1);
 490                 set_nlink(inode, 1);
 491                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 492                 inode->i_atime = hfsp_mt2ut(folder->access_date);
 493                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
 494                 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
 495                 HFSPLUS_I(inode)->create_date = folder->create_date;
 496                 HFSPLUS_I(inode)->fs_blocks = 0;
 497                 inode->i_op = &hfsplus_dir_inode_operations;
 498                 inode->i_fop = &hfsplus_dir_operations;
 499         } else if (type == HFSPLUS_FILE) {
 500                 struct hfsplus_cat_file *file = &entry.file;
 501
 502                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 503                         /* panic? */;
 504                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 505                                         sizeof(struct hfsplus_cat_file));
 506
 507                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
 508                                         &file->rsrc_fork : &file->data_fork);
 509                 hfsplus_get_perms(inode, &file->permissions, 0);
 510                 set_nlink(inode, 1);
 511                 if (S_ISREG(inode->i_mode)) {
 512                         if (file->permissions.dev)
 513                                 set_nlink(inode,
 514                                           be32_to_cpu(file->permissions.dev));
 515                         inode->i_op = &hfsplus_file_inode_operations;
 516                         inode->i_fop = &hfsplus_file_operations;
 517                         inode->i_mapping->a_ops = &hfsplus_aops;
 518                 } else if (S_ISLNK(inode->i_mode)) {
 519                         inode->i_op = &page_symlink_inode_operations;
 520                         inode->i_mapping->a_ops = &hfsplus_aops;
 521                 } else {
 522                         init_special_inode(inode, inode->i_mode,
 523                                            be32_to_cpu(file->permissions.dev));
 524                 }
 525                 inode->i_atime = hfsp_mt2ut(file->access_date);
 526                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
 527                 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
 528                 HFSPLUS_I(inode)->create_date = file->create_date;
 529         } else {
 530                 pr_err("bad catalog entry used to create inode\n");
 531                 res = -EIO;
 532         }
 533         return res;
 534 }
 535
 536 int hfsplus_cat_write_inode(struct inode *inode)
 537 {
 538         struct inode *main_inode = inode;
 539         struct hfs_find_data fd;
 540         hfsplus_cat_entry entry;
 541
 542         if (HFSPLUS_IS_RSRC(inode))
 543                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
 544
 545         if (!main_inode->i_nlink)
 546                 return 0;
 547
 548         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
 549                 /* panic? */
 550                 return -EIO;
 551
 552         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 553                 /* panic? */
 554                 goto out;
 555
 556         if (S_ISDIR(main_inode->i_mode)) {
 557                 struct hfsplus_cat_folder *folder = &entry.folder;
 558
 559                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 560                         /* panic? */;
 561                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 562                                         sizeof(struct hfsplus_cat_folder));
 563                 /* simple node checks? */
 564                 hfsplus_cat_set_perms(inode, &folder->permissions);
 565                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 566                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 567                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 568                 folder->valence = cpu_to_be32(inode->i_size - 2);
 569                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 570                                          sizeof(struct hfsplus_cat_folder));
 571         } else if (HFSPLUS_IS_RSRC(inode)) {
 572                 struct hfsplus_cat_file *file = &entry.file;
 573                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 574                                sizeof(struct hfsplus_cat_file));
 575                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 576                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 577                                 sizeof(struct hfsplus_cat_file));
 578         } else {
 579                 struct hfsplus_cat_file *file = &entry.file;
 580
 581                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 582                         /* panic? */;
 583                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 584                                         sizeof(struct hfsplus_cat_file));
 585                 hfsplus_inode_write_fork(inode, &file->data_fork);
 586                 hfsplus_cat_set_perms(inode, &file->permissions);
 587                 if (HFSPLUS_FLG_IMMUTABLE &
 588                                 (file->permissions.rootflags |
 589                                         file->permissions.userflags))
 590                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 591                 else
 592                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 593                 file->access_date = hfsp_ut2mt(inode->i_atime);
 594                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 595                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 596                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 597                                          sizeof(struct hfsplus_cat_file));
 598         }
 599
 600         set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
 601 out:
 602         hfs_find_exit(&fd);
 603         return 0;
 604 }