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         int err;
 176
 177         if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
 178                 goto out;
 179
 180         inode = HFSPLUS_I(dir).rsrc_inode;
 181         if (inode)
 182                 goto out;
 183
 184         inode = new_inode(sb);
 185         if (!inode)
 186                 return ERR_PTR(-ENOMEM);
 187
 188         inode->i_ino = dir->i_ino;
 189         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
 190         mutex_init(&HFSPLUS_I(inode).extents_lock);
 191         HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC;
 192
 193         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
 194         err = hfsplus_find_cat(sb, dir->i_ino, &fd);
 195         if (!err)
 196                 err = hfsplus_cat_read_inode(inode, &fd);
 197         hfs_find_exit(&fd);
 198         if (err) {
 199                 iput(inode);
 200                 return ERR_PTR(err);
 201         }
 202         HFSPLUS_I(inode).rsrc_inode = dir;
 203         HFSPLUS_I(dir).rsrc_inode = inode;
 204         igrab(dir);
 205         hlist_add_head(&inode->i_hash, &HFSPLUS_SB(sb).rsrc_inodes);
 206         mark_inode_dirty(inode);
 207 out:
 208         d_add(dentry, inode);
 209         return NULL;
 210 }
 211
 212 static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
 213 {
 214         struct super_block *sb = inode->i_sb;
 215         u16 mode;
 216
 217         mode = be16_to_cpu(perms->mode);
 218
 219         inode->i_uid = be32_to_cpu(perms->owner);
 220         if (!inode->i_uid && !mode)
 221                 inode->i_uid = HFSPLUS_SB(sb).uid;
 222
 223         inode->i_gid = be32_to_cpu(perms->group);
 224         if (!inode->i_gid && !mode)
 225                 inode->i_gid = HFSPLUS_SB(sb).gid;
 226
 227         if (dir) {
 228                 mode = mode ? (mode & S_IALLUGO) :
 229                         (S_IRWXUGO & ~(HFSPLUS_SB(sb).umask));
 230                 mode |= S_IFDIR;
 231         } else if (!mode)
 232                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) &
 233                         ~(HFSPLUS_SB(sb).umask));
 234         inode->i_mode = mode;
 235
 236         HFSPLUS_I(inode).rootflags = perms->rootflags;
 237         HFSPLUS_I(inode).userflags = perms->userflags;
 238         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
 239                 inode->i_flags |= S_IMMUTABLE;
 240         else
 241                 inode->i_flags &= ~S_IMMUTABLE;
 242         if (perms->rootflags & HFSPLUS_FLG_APPEND)
 243                 inode->i_flags |= S_APPEND;
 244         else
 245                 inode->i_flags &= ~S_APPEND;
 246 }
 247
 248 static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
 249 {
 250         if (inode->i_flags & S_IMMUTABLE)
 251                 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
 252         else
 253                 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
 254         if (inode->i_flags & S_APPEND)
 255                 perms->rootflags |= HFSPLUS_FLG_APPEND;
 256         else
 257                 perms->rootflags &= ~HFSPLUS_FLG_APPEND;
 258         perms->userflags = HFSPLUS_I(inode).userflags;
 259         perms->mode = cpu_to_be16(inode->i_mode);
 260         perms->owner = cpu_to_be32(inode->i_uid);
 261         perms->group = cpu_to_be32(inode->i_gid);
 262         perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev);
 263 }
 264
 265 static int hfsplus_file_open(struct inode *inode, struct file *file)
 266 {
 267         if (HFSPLUS_IS_RSRC(inode))
 268                 inode = HFSPLUS_I(inode).rsrc_inode;
 269         if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
 270                 return -EOVERFLOW;
 271         atomic_inc(&HFSPLUS_I(inode).opencnt);
 272         return 0;
 273 }
 274
 275 static int hfsplus_file_release(struct inode *inode, struct file *file)
 276 {
 277         struct super_block *sb = inode->i_sb;
 278
 279         if (HFSPLUS_IS_RSRC(inode))
 280                 inode = HFSPLUS_I(inode).rsrc_inode;
 281         if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
 282                 mutex_lock(&inode->i_mutex);
 283                 hfsplus_file_truncate(inode);
 284                 if (inode->i_flags & S_DEAD) {
 285                         hfsplus_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
 286                         hfsplus_delete_inode(inode);
 287                 }
 288                 mutex_unlock(&inode->i_mutex);
 289         }
 290         return 0;
 291 }
 292
 293 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 294 {
 295         struct inode *inode = dentry->d_inode;
 296         int error;
 297
 298         error = inode_change_ok(inode, attr);
 299         if (error)
 300                 return error;
 301
 302         if ((attr->ia_valid & ATTR_SIZE) &&
 303             attr->ia_size != i_size_read(inode)) {
 304                 error = vmtruncate(inode, attr->ia_size);
 305                 if (error)
 306                         return error;
 307         }
 308
 309         setattr_copy(inode, attr);
 310         mark_inode_dirty(inode);
 311         return 0;
 312 }
 313
 314 static int hfsplus_file_fsync(struct file *filp, int datasync)
 315 {
 316         struct inode *inode = filp->f_mapping->host;
 317         struct super_block * sb;
 318         int ret, err;
 319
 320         /* sync the inode to buffers */
 321         ret = write_inode_now(inode, 0);
 322
 323         /* sync the superblock to buffers */
 324         sb = inode->i_sb;
 325         if (sb->s_dirt) {
 326                 if (!(sb->s_flags & MS_RDONLY))
 327                         hfsplus_sync_fs(sb, 1);
 328                 else
 329                         sb->s_dirt = 0;
 330         }
 331
 332         /* .. finally sync the buffers to disk */
 333         err = sync_blockdev(sb->s_bdev);
 334         if (!ret)
 335                 ret = err;
 336         return ret;
 337 }
 338
 339 static const struct inode_operations hfsplus_file_inode_operations = {
 340         .lookup         = hfsplus_file_lookup,
 341         .truncate       = hfsplus_file_truncate,
 342         .setattr        = hfsplus_setattr,
 343         .setxattr       = hfsplus_setxattr,
 344         .getxattr       = hfsplus_getxattr,
 345         .listxattr      = hfsplus_listxattr,
 346 };
 347
 348 static const struct file_operations hfsplus_file_operations = {
 349         .llseek         = generic_file_llseek,
 350         .read           = do_sync_read,
 351         .aio_read       = generic_file_aio_read,
 352         .write          = do_sync_write,
 353         .aio_write      = generic_file_aio_write,
 354         .mmap           = generic_file_mmap,
 355         .splice_read    = generic_file_splice_read,
 356         .fsync          = hfsplus_file_fsync,
 357         .open           = hfsplus_file_open,
 358         .release        = hfsplus_file_release,
 359         .unlocked_ioctl = hfsplus_ioctl,
 360 };
 361
 362 struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
 363 {
 364         struct inode *inode = new_inode(sb);
 365         if (!inode)
 366                 return NULL;
 367
 368         inode->i_ino = HFSPLUS_SB(sb).next_cnid++;
 369         inode->i_mode = mode;
 370         inode->i_uid = current_fsuid();
 371         inode->i_gid = current_fsgid();
 372         inode->i_nlink = 1;
 373         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 374         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
 375         mutex_init(&HFSPLUS_I(inode).extents_lock);
 376         atomic_set(&HFSPLUS_I(inode).opencnt, 0);
 377         HFSPLUS_I(inode).flags = 0;
 378         memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec));
 379         memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
 380         HFSPLUS_I(inode).alloc_blocks = 0;
 381         HFSPLUS_I(inode).first_blocks = 0;
 382         HFSPLUS_I(inode).cached_start = 0;
 383         HFSPLUS_I(inode).cached_blocks = 0;
 384         HFSPLUS_I(inode).phys_size = 0;
 385         HFSPLUS_I(inode).fs_blocks = 0;
 386         HFSPLUS_I(inode).rsrc_inode = NULL;
 387         if (S_ISDIR(inode->i_mode)) {
 388                 inode->i_size = 2;
 389                 HFSPLUS_SB(sb).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                 HFSPLUS_SB(sb).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                 HFSPLUS_I(inode).clump_blocks = HFSPLUS_SB(sb).data_clump_blocks;
 398         } else if (S_ISLNK(inode->i_mode)) {
 399                 HFSPLUS_SB(sb).file_count++;
 400                 inode->i_op = &page_symlink_inode_operations;
 401                 inode->i_mapping->a_ops = &hfsplus_aops;
 402                 HFSPLUS_I(inode).clump_blocks = 1;
 403         } else
 404                 HFSPLUS_SB(sb).file_count++;
 405         insert_inode_hash(inode);
 406         mark_inode_dirty(inode);
 407         sb->s_dirt = 1;
 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                 sb->s_dirt = 1;
 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         sb->s_dirt = 1;
 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         u32 count;
 438         int i;
 439
 440         memcpy(&HFSPLUS_I(inode).first_extents, &fork->extents,
 441                sizeof(hfsplus_extent_rec));
 442         for (count = 0, i = 0; i < 8; i++)
 443                 count += be32_to_cpu(fork->extents[i].block_count);
 444         HFSPLUS_I(inode).first_blocks = count;
 445         memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
 446         HFSPLUS_I(inode).cached_start = 0;
 447         HFSPLUS_I(inode).cached_blocks = 0;
 448
 449         HFSPLUS_I(inode).alloc_blocks = be32_to_cpu(fork->total_blocks);
 450         inode->i_size = HFSPLUS_I(inode).phys_size = be64_to_cpu(fork->total_size);
 451         HFSPLUS_I(inode).fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 452         inode_set_bytes(inode, HFSPLUS_I(inode).fs_blocks << sb->s_blocksize_bits);
 453         HFSPLUS_I(inode).clump_blocks = be32_to_cpu(fork->clump_size) >> HFSPLUS_SB(sb).alloc_blksz_shift;
 454         if (!HFSPLUS_I(inode).clump_blocks)
 455                 HFSPLUS_I(inode).clump_blocks = HFSPLUS_IS_RSRC(inode) ? HFSPLUS_SB(sb).rsrc_clump_blocks :
 456                                 HFSPLUS_SB(sb).data_clump_blocks;
 457 }
 458
 459 void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 460 {
 461         memcpy(&fork->extents, &HFSPLUS_I(inode).first_extents,
 462                sizeof(hfsplus_extent_rec));
 463         fork->total_size = cpu_to_be64(inode->i_size);
 464         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode).alloc_blocks);
 465 }
 466
 467 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 468 {
 469         hfsplus_cat_entry entry;
 470         int res = 0;
 471         u16 type;
 472
 473         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 474
 475         HFSPLUS_I(inode).dev = 0;
 476         if (type == HFSPLUS_FOLDER) {
 477                 struct hfsplus_cat_folder *folder = &entry.folder;
 478
 479                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
 480                         /* panic? */;
 481                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 482                                         sizeof(struct hfsplus_cat_folder));
 483                 hfsplus_get_perms(inode, &folder->permissions, 1);
 484                 inode->i_nlink = 1;
 485                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 486                 inode->i_atime = hfsp_mt2ut(folder->access_date);
 487                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
 488                 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
 489                 HFSPLUS_I(inode).create_date = folder->create_date;
 490                 HFSPLUS_I(inode).fs_blocks = 0;
 491                 inode->i_op = &hfsplus_dir_inode_operations;
 492                 inode->i_fop = &hfsplus_dir_operations;
 493         } else if (type == HFSPLUS_FILE) {
 494                 struct hfsplus_cat_file *file = &entry.file;
 495
 496                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 497                         /* panic? */;
 498                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 499                                         sizeof(struct hfsplus_cat_file));
 500
 501                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ?
 502                                         &file->data_fork : &file->rsrc_fork);
 503                 hfsplus_get_perms(inode, &file->permissions, 0);
 504                 inode->i_nlink = 1;
 505                 if (S_ISREG(inode->i_mode)) {
 506                         if (file->permissions.dev)
 507                                 inode->i_nlink = be32_to_cpu(file->permissions.dev);
 508                         inode->i_op = &hfsplus_file_inode_operations;
 509                         inode->i_fop = &hfsplus_file_operations;
 510                         inode->i_mapping->a_ops = &hfsplus_aops;
 511                 } else if (S_ISLNK(inode->i_mode)) {
 512                         inode->i_op = &page_symlink_inode_operations;
 513                         inode->i_mapping->a_ops = &hfsplus_aops;
 514                 } else {
 515                         init_special_inode(inode, inode->i_mode,
 516                                            be32_to_cpu(file->permissions.dev));
 517                 }
 518                 inode->i_atime = hfsp_mt2ut(file->access_date);
 519                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
 520                 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
 521                 HFSPLUS_I(inode).create_date = file->create_date;
 522         } else {
 523                 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
 524                 res = -EIO;
 525         }
 526         return res;
 527 }
 528
 529 int hfsplus_cat_write_inode(struct inode *inode)
 530 {
 531         struct inode *main_inode = inode;
 532         struct hfs_find_data fd;
 533         hfsplus_cat_entry entry;
 534
 535         if (HFSPLUS_IS_RSRC(inode))
 536                 main_inode = HFSPLUS_I(inode).rsrc_inode;
 537
 538         if (!main_inode->i_nlink)
 539                 return 0;
 540
 541         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd))
 542                 /* panic? */
 543                 return -EIO;
 544
 545         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 546                 /* panic? */
 547                 goto out;
 548
 549         if (S_ISDIR(main_inode->i_mode)) {
 550                 struct hfsplus_cat_folder *folder = &entry.folder;
 551
 552                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 553                         /* panic? */;
 554                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 555                                         sizeof(struct hfsplus_cat_folder));
 556                 /* simple node checks? */
 557                 hfsplus_set_perms(inode, &folder->permissions);
 558                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 559                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 560                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 561                 folder->valence = cpu_to_be32(inode->i_size - 2);
 562                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 563                                          sizeof(struct hfsplus_cat_folder));
 564         } else if (HFSPLUS_IS_RSRC(inode)) {
 565                 struct hfsplus_cat_file *file = &entry.file;
 566                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 567                                sizeof(struct hfsplus_cat_file));
 568                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 569                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 570                                 sizeof(struct hfsplus_cat_file));
 571         } else {
 572                 struct hfsplus_cat_file *file = &entry.file;
 573
 574                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 575                         /* panic? */;
 576                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 577                                         sizeof(struct hfsplus_cat_file));
 578                 hfsplus_inode_write_fork(inode, &file->data_fork);
 579                 if (S_ISREG(inode->i_mode))
 580                         HFSPLUS_I(inode).dev = inode->i_nlink;
 581                 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 582                         HFSPLUS_I(inode).dev = kdev_t_to_nr(inode->i_rdev);
 583                 hfsplus_set_perms(inode, &file->permissions);
 584                 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
 585                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 586                 else
 587                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 588                 file->access_date = hfsp_ut2mt(inode->i_atime);
 589                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 590                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 591                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 592                                          sizeof(struct hfsplus_cat_file));
 593         }
 594 out:
 595         hfs_find_exit(&fd);
 596         return 0;
 597 }