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
  18 #include "hfsplus_fs.h"
  19 #include "hfsplus_raw.h"
  20
  21 static int hfsplus_readpage(struct file *file, struct page *page)
  22 {
  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         return block_write_full_page(page, hfsplus_get_block, wbc);
  29 }
  30
  31 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
  32 {
  33         struct inode *inode = mapping->host;
  34
  35         if (to > inode->i_size) {
  36                 truncate_pagecache(inode, to, inode->i_size);
  37                 hfsplus_file_truncate(inode);
  38         }
  39 }
  40
  41 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
  42                         loff_t pos, unsigned len, unsigned flags,
  43                         struct page **pagep, void **fsdata)
  44 {
  45         int ret;
  46
  47         *pagep = NULL;
  48         ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
  49                                 hfsplus_get_block,
  50                                 &HFSPLUS_I(mapping->host)->phys_size);
  51         if (unlikely(ret))
  52                 hfsplus_write_failed(mapping, pos + len);
  53
  54         return ret;
  55 }
  56
  57 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  58 {
  59         return generic_block_bmap(mapping, block, hfsplus_get_block);
  60 }
  61
  62 static int hfsplus_releasepage(struct page *page, gfp_t mask)
  63 {
  64         struct inode *inode = page->mapping->host;
  65         struct super_block *sb = inode->i_sb;
  66         struct hfs_btree *tree;
  67         struct hfs_bnode *node;
  68         u32 nidx;
  69         int i, res = 1;
  70
  71         switch (inode->i_ino) {
  72         case HFSPLUS_EXT_CNID:
  73                 tree = HFSPLUS_SB(sb)->ext_tree;
  74                 break;
  75         case HFSPLUS_CAT_CNID:
  76                 tree = HFSPLUS_SB(sb)->cat_tree;
  77                 break;
  78         case HFSPLUS_ATTR_CNID:
  79                 tree = HFSPLUS_SB(sb)->attr_tree;
  80                 break;
  81         default:
  82                 BUG();
  83                 return 0;
  84         }
  85         if (!tree)
  86                 return 0;
  87         if (tree->node_size >= PAGE_CACHE_SIZE) {
  88                 nidx = page->index >>
  89                         (tree->node_size_shift - PAGE_CACHE_SHIFT);
  90                 spin_lock(&tree->hash_lock);
  91                 node = hfs_bnode_findhash(tree, nidx);
  92                 if (!node)
  93                         ;
  94                 else if (atomic_read(&node->refcnt))
  95                         res = 0;
  96                 if (res && node) {
  97                         hfs_bnode_unhash(node);
  98                         hfs_bnode_free(node);
  99                 }
 100                 spin_unlock(&tree->hash_lock);
 101         } else {
 102                 nidx = page->index <<
 103                         (PAGE_CACHE_SHIFT - tree->node_size_shift);
 104                 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
 105                 spin_lock(&tree->hash_lock);
 106                 do {
 107                         node = hfs_bnode_findhash(tree, nidx++);
 108                         if (!node)
 109                                 continue;
 110                         if (atomic_read(&node->refcnt)) {
 111                                 res = 0;
 112                                 break;
 113                         }
 114                         hfs_bnode_unhash(node);
 115                         hfs_bnode_free(node);
 116                 } while (--i && nidx < tree->node_count);
 117                 spin_unlock(&tree->hash_lock);
 118         }
 119         return res ? try_to_free_buffers(page) : 0;
 120 }
 121
 122 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
 123                 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
 124 {
 125         struct file *file = iocb->ki_filp;
 126         struct address_space *mapping = file->f_mapping;
 127         struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
 128         ssize_t ret;
 129
 130         ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
 131                                  hfsplus_get_block);
 132
 133         /*
 134          * In case of error extending write may have instantiated a few
 135          * blocks outside i_size. Trim these off again.
 136          */
 137         if (unlikely((rw & WRITE) && ret < 0)) {
 138                 loff_t isize = i_size_read(inode);
 139                 loff_t end = offset + iov_length(iov, nr_segs);
 140
 141                 if (end > isize)
 142                         hfsplus_write_failed(mapping, end);
 143         }
 144
 145         return ret;
 146 }
 147
 148 static int hfsplus_writepages(struct address_space *mapping,
 149                               struct writeback_control *wbc)
 150 {
 151         return mpage_writepages(mapping, wbc, hfsplus_get_block);
 152 }
 153
 154 const struct address_space_operations hfsplus_btree_aops = {
 155         .readpage       = hfsplus_readpage,
 156         .writepage      = hfsplus_writepage,
 157         .write_begin    = hfsplus_write_begin,
 158         .write_end      = generic_write_end,
 159         .bmap           = hfsplus_bmap,
 160         .releasepage    = hfsplus_releasepage,
 161 };
 162
 163 const struct address_space_operations hfsplus_aops = {
 164         .readpage       = hfsplus_readpage,
 165         .writepage      = hfsplus_writepage,
 166         .write_begin    = hfsplus_write_begin,
 167         .write_end      = generic_write_end,
 168         .bmap           = hfsplus_bmap,
 169         .direct_IO      = hfsplus_direct_IO,
 170         .writepages     = hfsplus_writepages,
 171 };
 172
 173 const struct dentry_operations hfsplus_dentry_operations = {
 174         .d_hash       = hfsplus_hash_dentry,
 175         .d_compare    = hfsplus_compare_dentry,
 176 };
 177
 178 static struct dentry *hfsplus_file_lookup(struct inode *dir,
 179                 struct dentry *dentry, unsigned int flags)
 180 {
 181         struct hfs_find_data fd;
 182         struct super_block *sb = dir->i_sb;
 183         struct inode *inode = NULL;
 184         struct hfsplus_inode_info *hip;
 185         int err;
 186
 187         if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
 188                 goto out;
 189
 190         inode = HFSPLUS_I(dir)->rsrc_inode;
 191         if (inode)
 192                 goto out;
 193
 194         inode = new_inode(sb);
 195         if (!inode)
 196                 return ERR_PTR(-ENOMEM);
 197
 198         hip = HFSPLUS_I(inode);
 199         inode->i_ino = dir->i_ino;
 200         INIT_LIST_HEAD(&hip->open_dir_list);
 201         mutex_init(&hip->extents_lock);
 202         hip->extent_state = 0;
 203         hip->flags = 0;
 204         hip->userflags = 0;
 205         set_bit(HFSPLUS_I_RSRC, &hip->flags);
 206
 207         err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
 208         if (!err) {
 209                 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
 210                 if (!err)
 211                         err = hfsplus_cat_read_inode(inode, &fd);
 212                 hfs_find_exit(&fd);
 213         }
 214         if (err) {
 215                 iput(inode);
 216                 return ERR_PTR(err);
 217         }
 218         hip->rsrc_inode = dir;
 219         HFSPLUS_I(dir)->rsrc_inode = inode;
 220         igrab(dir);
 221
 222         /*
 223          * __mark_inode_dirty expects inodes to be hashed.  Since we don't
 224          * want resource fork inodes in the regular inode space, we make them
 225          * appear hashed, but do not put on any lists.  hlist_del()
 226          * will work fine and require no locking.
 227          */
 228         hlist_add_fake(&inode->i_hash);
 229
 230         mark_inode_dirty(inode);
 231 out:
 232         d_add(dentry, inode);
 233         return NULL;
 234 }
 235
 236 static void hfsplus_get_perms(struct inode *inode,
 237                 struct hfsplus_perm *perms, int dir)
 238 {
 239         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 240         u16 mode;
 241
 242         mode = be16_to_cpu(perms->mode);
 243
 244         i_uid_write(inode, be32_to_cpu(perms->owner));
 245         if (!i_uid_read(inode) && !mode)
 246                 inode->i_uid = sbi->uid;
 247
 248         i_gid_write(inode, be32_to_cpu(perms->group));
 249         if (!i_gid_read(inode) && !mode)
 250                 inode->i_gid = sbi->gid;
 251
 252         if (dir) {
 253                 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
 254                 mode |= S_IFDIR;
 255         } else if (!mode)
 256                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
 257         inode->i_mode = mode;
 258
 259         HFSPLUS_I(inode)->userflags = perms->userflags;
 260         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
 261                 inode->i_flags |= S_IMMUTABLE;
 262         else
 263                 inode->i_flags &= ~S_IMMUTABLE;
 264         if (perms->rootflags & HFSPLUS_FLG_APPEND)
 265                 inode->i_flags |= S_APPEND;
 266         else
 267                 inode->i_flags &= ~S_APPEND;
 268 }
 269
 270 static int hfsplus_file_open(struct inode *inode, struct file *file)
 271 {
 272         if (HFSPLUS_IS_RSRC(inode))
 273                 inode = HFSPLUS_I(inode)->rsrc_inode;
 274         if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
 275                 return -EOVERFLOW;
 276         atomic_inc(&HFSPLUS_I(inode)->opencnt);
 277         return 0;
 278 }
 279
 280 static int hfsplus_file_release(struct inode *inode, struct file *file)
 281 {
 282         struct super_block *sb = inode->i_sb;
 283
 284         if (HFSPLUS_IS_RSRC(inode))
 285                 inode = HFSPLUS_I(inode)->rsrc_inode;
 286         if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
 287                 mutex_lock(&inode->i_mutex);
 288                 hfsplus_file_truncate(inode);
 289                 if (inode->i_flags & S_DEAD) {
 290                         hfsplus_delete_cat(inode->i_ino,
 291                                            HFSPLUS_SB(sb)->hidden_dir, NULL);
 292                         hfsplus_delete_inode(inode);
 293                 }
 294                 mutex_unlock(&inode->i_mutex);
 295         }
 296         return 0;
 297 }
 298
 299 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 300 {
 301         struct inode *inode = dentry->d_inode;
 302         int error;
 303
 304         error = inode_change_ok(inode, attr);
 305         if (error)
 306                 return error;
 307
 308         if ((attr->ia_valid & ATTR_SIZE) &&
 309             attr->ia_size != i_size_read(inode)) {
 310                 inode_dio_wait(inode);
 311                 truncate_setsize(inode, attr->ia_size);
 312                 hfsplus_file_truncate(inode);
 313         }
 314
 315         setattr_copy(inode, attr);
 316         mark_inode_dirty(inode);
 317         return 0;
 318 }
 319
 320 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 321                        int datasync)
 322 {
 323         struct inode *inode = file->f_mapping->host;
 324         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 325         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 326         int error = 0, error2;
 327
 328         error = filemap_write_and_wait_range(inode->i_mapping, start, end);
 329         if (error)
 330                 return error;
 331         mutex_lock(&inode->i_mutex);
 332
 333         /*
 334          * Sync inode metadata into the catalog and extent trees.
 335          */
 336         sync_inode_metadata(inode, 1);
 337
 338         /*
 339          * And explicitly write out the btrees.
 340          */
 341         if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
 342                 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
 343
 344         if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
 345                 error2 =
 346                         filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
 347                 if (!error)
 348                         error = error2;
 349         }
 350
 351         if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
 352                 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
 353                 if (!error)
 354                         error = error2;
 355         }
 356
 357         if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
 358                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
 359
 360         mutex_unlock(&inode->i_mutex);
 361
 362         return error;
 363 }
 364
 365 static const struct inode_operations hfsplus_file_inode_operations = {
 366         .lookup         = hfsplus_file_lookup,
 367         .setattr        = hfsplus_setattr,
 368         .setxattr       = hfsplus_setxattr,
 369         .getxattr       = hfsplus_getxattr,
 370         .listxattr      = hfsplus_listxattr,
 371 };
 372
 373 static const struct file_operations hfsplus_file_operations = {
 374         .llseek         = generic_file_llseek,
 375         .read           = do_sync_read,
 376         .aio_read       = generic_file_aio_read,
 377         .write          = do_sync_write,
 378         .aio_write      = generic_file_aio_write,
 379         .mmap           = generic_file_mmap,
 380         .splice_read    = generic_file_splice_read,
 381         .fsync          = hfsplus_file_fsync,
 382         .open           = hfsplus_file_open,
 383         .release        = hfsplus_file_release,
 384         .unlocked_ioctl = hfsplus_ioctl,
 385 };
 386
 387 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
 388 {
 389         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 390         struct inode *inode = new_inode(sb);
 391         struct hfsplus_inode_info *hip;
 392
 393         if (!inode)
 394                 return NULL;
 395
 396         inode->i_ino = sbi->next_cnid++;
 397         inode->i_mode = mode;
 398         inode->i_uid = current_fsuid();
 399         inode->i_gid = current_fsgid();
 400         set_nlink(inode, 1);
 401         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 402
 403         hip = HFSPLUS_I(inode);
 404         INIT_LIST_HEAD(&hip->open_dir_list);
 405         mutex_init(&hip->extents_lock);
 406         atomic_set(&hip->opencnt, 0);
 407         hip->extent_state = 0;
 408         hip->flags = 0;
 409         hip->userflags = 0;
 410         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 411         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 412         hip->alloc_blocks = 0;
 413         hip->first_blocks = 0;
 414         hip->cached_start = 0;
 415         hip->cached_blocks = 0;
 416         hip->phys_size = 0;
 417         hip->fs_blocks = 0;
 418         hip->rsrc_inode = NULL;
 419         if (S_ISDIR(inode->i_mode)) {
 420                 inode->i_size = 2;
 421                 sbi->folder_count++;
 422                 inode->i_op = &hfsplus_dir_inode_operations;
 423                 inode->i_fop = &hfsplus_dir_operations;
 424         } else if (S_ISREG(inode->i_mode)) {
 425                 sbi->file_count++;
 426                 inode->i_op = &hfsplus_file_inode_operations;
 427                 inode->i_fop = &hfsplus_file_operations;
 428                 inode->i_mapping->a_ops = &hfsplus_aops;
 429                 hip->clump_blocks = sbi->data_clump_blocks;
 430         } else if (S_ISLNK(inode->i_mode)) {
 431                 sbi->file_count++;
 432                 inode->i_op = &page_symlink_inode_operations;
 433                 inode->i_mapping->a_ops = &hfsplus_aops;
 434                 hip->clump_blocks = 1;
 435         } else
 436                 sbi->file_count++;
 437         insert_inode_hash(inode);
 438         mark_inode_dirty(inode);
 439         hfsplus_mark_mdb_dirty(sb);
 440
 441         return inode;
 442 }
 443
 444 void hfsplus_delete_inode(struct inode *inode)
 445 {
 446         struct super_block *sb = inode->i_sb;
 447
 448         if (S_ISDIR(inode->i_mode)) {
 449                 HFSPLUS_SB(sb)->folder_count--;
 450                 hfsplus_mark_mdb_dirty(sb);
 451                 return;
 452         }
 453         HFSPLUS_SB(sb)->file_count--;
 454         if (S_ISREG(inode->i_mode)) {
 455                 if (!inode->i_nlink) {
 456                         inode->i_size = 0;
 457                         hfsplus_file_truncate(inode);
 458                 }
 459         } else if (S_ISLNK(inode->i_mode)) {
 460                 inode->i_size = 0;
 461                 hfsplus_file_truncate(inode);
 462         }
 463         hfsplus_mark_mdb_dirty(sb);
 464 }
 465
 466 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 467 {
 468         struct super_block *sb = inode->i_sb;
 469         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 470         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 471         u32 count;
 472         int i;
 473
 474         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
 475         for (count = 0, i = 0; i < 8; i++)
 476                 count += be32_to_cpu(fork->extents[i].block_count);
 477         hip->first_blocks = count;
 478         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 479         hip->cached_start = 0;
 480         hip->cached_blocks = 0;
 481
 482         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
 483         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
 484         hip->fs_blocks =
 485                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 486         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
 487         hip->clump_blocks =
 488                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
 489         if (!hip->clump_blocks) {
 490                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
 491                         sbi->rsrc_clump_blocks :
 492                         sbi->data_clump_blocks;
 493         }
 494 }
 495
 496 void hfsplus_inode_write_fork(struct inode *inode,
 497                 struct hfsplus_fork_raw *fork)
 498 {
 499         memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
 500                sizeof(hfsplus_extent_rec));
 501         fork->total_size = cpu_to_be64(inode->i_size);
 502         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
 503 }
 504
 505 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 506 {
 507         hfsplus_cat_entry entry;
 508         int res = 0;
 509         u16 type;
 510
 511         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 512
 513         HFSPLUS_I(inode)->linkid = 0;
 514         if (type == HFSPLUS_FOLDER) {
 515                 struct hfsplus_cat_folder *folder = &entry.folder;
 516
 517                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
 518                         /* panic? */;
 519                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 520                                         sizeof(struct hfsplus_cat_folder));
 521                 hfsplus_get_perms(inode, &folder->permissions, 1);
 522                 set_nlink(inode, 1);
 523                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 524                 inode->i_atime = hfsp_mt2ut(folder->access_date);
 525                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
 526                 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
 527                 HFSPLUS_I(inode)->create_date = folder->create_date;
 528                 HFSPLUS_I(inode)->fs_blocks = 0;
 529                 inode->i_op = &hfsplus_dir_inode_operations;
 530                 inode->i_fop = &hfsplus_dir_operations;
 531         } else if (type == HFSPLUS_FILE) {
 532                 struct hfsplus_cat_file *file = &entry.file;
 533
 534                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 535                         /* panic? */;
 536                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 537                                         sizeof(struct hfsplus_cat_file));
 538
 539                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
 540                                         &file->rsrc_fork : &file->data_fork);
 541                 hfsplus_get_perms(inode, &file->permissions, 0);
 542                 set_nlink(inode, 1);
 543                 if (S_ISREG(inode->i_mode)) {
 544                         if (file->permissions.dev)
 545                                 set_nlink(inode,
 546                                           be32_to_cpu(file->permissions.dev));
 547                         inode->i_op = &hfsplus_file_inode_operations;
 548                         inode->i_fop = &hfsplus_file_operations;
 549                         inode->i_mapping->a_ops = &hfsplus_aops;
 550                 } else if (S_ISLNK(inode->i_mode)) {
 551                         inode->i_op = &page_symlink_inode_operations;
 552                         inode->i_mapping->a_ops = &hfsplus_aops;
 553                 } else {
 554                         init_special_inode(inode, inode->i_mode,
 555                                            be32_to_cpu(file->permissions.dev));
 556                 }
 557                 inode->i_atime = hfsp_mt2ut(file->access_date);
 558                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
 559                 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
 560                 HFSPLUS_I(inode)->create_date = file->create_date;
 561         } else {
 562                 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
 563                 res = -EIO;
 564         }
 565         return res;
 566 }
 567
 568 int hfsplus_cat_write_inode(struct inode *inode)
 569 {
 570         struct inode *main_inode = inode;
 571         struct hfs_find_data fd;
 572         hfsplus_cat_entry entry;
 573
 574         if (HFSPLUS_IS_RSRC(inode))
 575                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
 576
 577         if (!main_inode->i_nlink)
 578                 return 0;
 579
 580         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
 581                 /* panic? */
 582                 return -EIO;
 583
 584         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 585                 /* panic? */
 586                 goto out;
 587
 588         if (S_ISDIR(main_inode->i_mode)) {
 589                 struct hfsplus_cat_folder *folder = &entry.folder;
 590
 591                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 592                         /* panic? */;
 593                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 594                                         sizeof(struct hfsplus_cat_folder));
 595                 /* simple node checks? */
 596                 hfsplus_cat_set_perms(inode, &folder->permissions);
 597                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 598                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 599                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 600                 folder->valence = cpu_to_be32(inode->i_size - 2);
 601                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 602                                          sizeof(struct hfsplus_cat_folder));
 603         } else if (HFSPLUS_IS_RSRC(inode)) {
 604                 struct hfsplus_cat_file *file = &entry.file;
 605                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 606                                sizeof(struct hfsplus_cat_file));
 607                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 608                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 609                                 sizeof(struct hfsplus_cat_file));
 610         } else {
 611                 struct hfsplus_cat_file *file = &entry.file;
 612
 613                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 614                         /* panic? */;
 615                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 616                                         sizeof(struct hfsplus_cat_file));
 617                 hfsplus_inode_write_fork(inode, &file->data_fork);
 618                 hfsplus_cat_set_perms(inode, &file->permissions);
 619                 if (HFSPLUS_FLG_IMMUTABLE &
 620                                 (file->permissions.rootflags |
 621                                         file->permissions.userflags))
 622                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 623                 else
 624                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 625                 file->access_date = hfsp_ut2mt(inode->i_atime);
 626                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 627                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 628                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 629                                          sizeof(struct hfsplus_cat_file));
 630         }
 631
 632         set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
 633 out:
 634         hfs_find_exit(&fd);
 635         return 0;
 636 }