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         struct hfsplus_inode_info *hip;
 176         int err;
 177
 178         if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
 179                 goto out;
 180
 181         inode = HFSPLUS_I(dir)->rsrc_inode;
 182         if (inode)
 183                 goto out;
 184
 185         inode = new_inode(sb);
 186         if (!inode)
 187                 return ERR_PTR(-ENOMEM);
 188
 189         hip = HFSPLUS_I(inode);
 190         inode->i_ino = dir->i_ino;
 191         INIT_LIST_HEAD(&hip->open_dir_list);
 192         mutex_init(&hip->extents_lock);
 193         hip->flags = HFSPLUS_FLG_RSRC;
 194
 195         hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
 196         err = hfsplus_find_cat(sb, dir->i_ino, &fd);
 197         if (!err)
 198                 err = hfsplus_cat_read_inode(inode, &fd);
 199         hfs_find_exit(&fd);
 200         if (err) {
 201                 iput(inode);
 202                 return ERR_PTR(err);
 203         }
 204         hip->rsrc_inode = dir;
 205         HFSPLUS_I(dir)->rsrc_inode = inode;
 206         igrab(dir);
 207
 208         /*
 209          * __mark_inode_dirty expects inodes to be hashed.  Since we don't
 210          * want resource fork inodes in the regular inode space, we make them
 211          * appear hashed, but do not put on any lists.  hlist_del()
 212          * will work fine and require no locking.
 213          */
 214         inode->i_hash.pprev = &inode->i_hash.next;
 215
 216         mark_inode_dirty(inode);
 217 out:
 218         d_add(dentry, inode);
 219         return NULL;
 220 }
 221
 222 static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
 223 {
 224         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 225         u16 mode;
 226
 227         mode = be16_to_cpu(perms->mode);
 228
 229         inode->i_uid = be32_to_cpu(perms->owner);
 230         if (!inode->i_uid && !mode)
 231                 inode->i_uid = sbi->uid;
 232
 233         inode->i_gid = be32_to_cpu(perms->group);
 234         if (!inode->i_gid && !mode)
 235                 inode->i_gid = sbi->gid;
 236
 237         if (dir) {
 238                 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
 239                 mode |= S_IFDIR;
 240         } else if (!mode)
 241                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
 242         inode->i_mode = mode;
 243
 244         HFSPLUS_I(inode)->rootflags = perms->rootflags;
 245         HFSPLUS_I(inode)->userflags = perms->userflags;
 246         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
 247                 inode->i_flags |= S_IMMUTABLE;
 248         else
 249                 inode->i_flags &= ~S_IMMUTABLE;
 250         if (perms->rootflags & HFSPLUS_FLG_APPEND)
 251                 inode->i_flags |= S_APPEND;
 252         else
 253                 inode->i_flags &= ~S_APPEND;
 254 }
 255
 256 static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
 257 {
 258         if (inode->i_flags & S_IMMUTABLE)
 259                 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
 260         else
 261                 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
 262         if (inode->i_flags & S_APPEND)
 263                 perms->rootflags |= HFSPLUS_FLG_APPEND;
 264         else
 265                 perms->rootflags &= ~HFSPLUS_FLG_APPEND;
 266         perms->userflags = HFSPLUS_I(inode)->userflags;
 267         perms->mode = cpu_to_be16(inode->i_mode);
 268         perms->owner = cpu_to_be32(inode->i_uid);
 269         perms->group = cpu_to_be32(inode->i_gid);
 270
 271         if (S_ISREG(inode->i_mode))
 272                 perms->dev = cpu_to_be32(inode->i_nlink);
 273         else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode))
 274                 perms->dev = cpu_to_be32(inode->i_rdev);
 275         else
 276                 perms->dev = 0;
 277 }
 278
 279 static int hfsplus_file_open(struct inode *inode, struct file *file)
 280 {
 281         if (HFSPLUS_IS_RSRC(inode))
 282                 inode = HFSPLUS_I(inode)->rsrc_inode;
 283         if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
 284                 return -EOVERFLOW;
 285         atomic_inc(&HFSPLUS_I(inode)->opencnt);
 286         return 0;
 287 }
 288
 289 static int hfsplus_file_release(struct inode *inode, struct file *file)
 290 {
 291         struct super_block *sb = inode->i_sb;
 292
 293         if (HFSPLUS_IS_RSRC(inode))
 294                 inode = HFSPLUS_I(inode)->rsrc_inode;
 295         if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
 296                 mutex_lock(&inode->i_mutex);
 297                 hfsplus_file_truncate(inode);
 298                 if (inode->i_flags & S_DEAD) {
 299                         hfsplus_delete_cat(inode->i_ino,
 300                                            HFSPLUS_SB(sb)->hidden_dir, NULL);
 301                         hfsplus_delete_inode(inode);
 302                 }
 303                 mutex_unlock(&inode->i_mutex);
 304         }
 305         return 0;
 306 }
 307
 308 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 309 {
 310         struct inode *inode = dentry->d_inode;
 311         int error;
 312
 313         error = inode_change_ok(inode, attr);
 314         if (error)
 315                 return error;
 316
 317         if ((attr->ia_valid & ATTR_SIZE) &&
 318             attr->ia_size != i_size_read(inode)) {
 319                 error = vmtruncate(inode, attr->ia_size);
 320                 if (error)
 321                         return error;
 322         }
 323
 324         setattr_copy(inode, attr);
 325         mark_inode_dirty(inode);
 326         return 0;
 327 }
 328
 329 static int hfsplus_file_fsync(struct file *filp, int datasync)
 330 {
 331         struct inode *inode = filp->f_mapping->host;
 332         struct super_block * sb;
 333         int ret, err;
 334
 335         /* sync the inode to buffers */
 336         ret = write_inode_now(inode, 0);
 337
 338         /* sync the superblock to buffers */
 339         sb = inode->i_sb;
 340         if (sb->s_dirt) {
 341                 if (!(sb->s_flags & MS_RDONLY))
 342                         hfsplus_sync_fs(sb, 1);
 343                 else
 344                         sb->s_dirt = 0;
 345         }
 346
 347         /* .. finally sync the buffers to disk */
 348         err = sync_blockdev(sb->s_bdev);
 349         if (!ret)
 350                 ret = err;
 351         return ret;
 352 }
 353
 354 static const struct inode_operations hfsplus_file_inode_operations = {
 355         .lookup         = hfsplus_file_lookup,
 356         .truncate       = hfsplus_file_truncate,
 357         .setattr        = hfsplus_setattr,
 358         .setxattr       = hfsplus_setxattr,
 359         .getxattr       = hfsplus_getxattr,
 360         .listxattr      = hfsplus_listxattr,
 361 };
 362
 363 static const struct file_operations hfsplus_file_operations = {
 364         .llseek         = generic_file_llseek,
 365         .read           = do_sync_read,
 366         .aio_read       = generic_file_aio_read,
 367         .write          = do_sync_write,
 368         .aio_write      = generic_file_aio_write,
 369         .mmap           = generic_file_mmap,
 370         .splice_read    = generic_file_splice_read,
 371         .fsync          = hfsplus_file_fsync,
 372         .open           = hfsplus_file_open,
 373         .release        = hfsplus_file_release,
 374         .unlocked_ioctl = hfsplus_ioctl,
 375 };
 376
 377 struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
 378 {
 379         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 380         struct inode *inode = new_inode(sb);
 381         struct hfsplus_inode_info *hip;
 382
 383         if (!inode)
 384                 return NULL;
 385
 386         inode->i_ino = sbi->next_cnid++;
 387         inode->i_mode = mode;
 388         inode->i_uid = current_fsuid();
 389         inode->i_gid = current_fsgid();
 390         inode->i_nlink = 1;
 391         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 392
 393         hip = HFSPLUS_I(inode);
 394         INIT_LIST_HEAD(&hip->open_dir_list);
 395         mutex_init(&hip->extents_lock);
 396         atomic_set(&hip->opencnt, 0);
 397         hip->flags = 0;
 398         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 399         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 400         hip->alloc_blocks = 0;
 401         hip->first_blocks = 0;
 402         hip->cached_start = 0;
 403         hip->cached_blocks = 0;
 404         hip->phys_size = 0;
 405         hip->fs_blocks = 0;
 406         hip->rsrc_inode = NULL;
 407         if (S_ISDIR(inode->i_mode)) {
 408                 inode->i_size = 2;
 409                 sbi->folder_count++;
 410                 inode->i_op = &hfsplus_dir_inode_operations;
 411                 inode->i_fop = &hfsplus_dir_operations;
 412         } else if (S_ISREG(inode->i_mode)) {
 413                 sbi->file_count++;
 414                 inode->i_op = &hfsplus_file_inode_operations;
 415                 inode->i_fop = &hfsplus_file_operations;
 416                 inode->i_mapping->a_ops = &hfsplus_aops;
 417                 hip->clump_blocks = sbi->data_clump_blocks;
 418         } else if (S_ISLNK(inode->i_mode)) {
 419                 sbi->file_count++;
 420                 inode->i_op = &page_symlink_inode_operations;
 421                 inode->i_mapping->a_ops = &hfsplus_aops;
 422                 hip->clump_blocks = 1;
 423         } else
 424                 sbi->file_count++;
 425         insert_inode_hash(inode);
 426         mark_inode_dirty(inode);
 427         sb->s_dirt = 1;
 428
 429         return inode;
 430 }
 431
 432 void hfsplus_delete_inode(struct inode *inode)
 433 {
 434         struct super_block *sb = inode->i_sb;
 435
 436         if (S_ISDIR(inode->i_mode)) {
 437                 HFSPLUS_SB(sb)->folder_count--;
 438                 sb->s_dirt = 1;
 439                 return;
 440         }
 441         HFSPLUS_SB(sb)->file_count--;
 442         if (S_ISREG(inode->i_mode)) {
 443                 if (!inode->i_nlink) {
 444                         inode->i_size = 0;
 445                         hfsplus_file_truncate(inode);
 446                 }
 447         } else if (S_ISLNK(inode->i_mode)) {
 448                 inode->i_size = 0;
 449                 hfsplus_file_truncate(inode);
 450         }
 451         sb->s_dirt = 1;
 452 }
 453
 454 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 455 {
 456         struct super_block *sb = inode->i_sb;
 457         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 458         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 459         u32 count;
 460         int i;
 461
 462         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
 463         for (count = 0, i = 0; i < 8; i++)
 464                 count += be32_to_cpu(fork->extents[i].block_count);
 465         hip->first_blocks = count;
 466         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 467         hip->cached_start = 0;
 468         hip->cached_blocks = 0;
 469
 470         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
 471         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
 472         hip->fs_blocks =
 473                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 474         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
 475         hip->clump_blocks =
 476                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
 477         if (!hip->clump_blocks) {
 478                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
 479                         sbi->rsrc_clump_blocks :
 480                         sbi->data_clump_blocks;
 481         }
 482 }
 483
 484 void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 485 {
 486         memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
 487                sizeof(hfsplus_extent_rec));
 488         fork->total_size = cpu_to_be64(inode->i_size);
 489         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
 490 }
 491
 492 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 493 {
 494         hfsplus_cat_entry entry;
 495         int res = 0;
 496         u16 type;
 497
 498         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 499
 500         HFSPLUS_I(inode)->linkid = 0;
 501         if (type == HFSPLUS_FOLDER) {
 502                 struct hfsplus_cat_folder *folder = &entry.folder;
 503
 504                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
 505                         /* panic? */;
 506                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 507                                         sizeof(struct hfsplus_cat_folder));
 508                 hfsplus_get_perms(inode, &folder->permissions, 1);
 509                 inode->i_nlink = 1;
 510                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 511                 inode->i_atime = hfsp_mt2ut(folder->access_date);
 512                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
 513                 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
 514                 HFSPLUS_I(inode)->create_date = folder->create_date;
 515                 HFSPLUS_I(inode)->fs_blocks = 0;
 516                 inode->i_op = &hfsplus_dir_inode_operations;
 517                 inode->i_fop = &hfsplus_dir_operations;
 518         } else if (type == HFSPLUS_FILE) {
 519                 struct hfsplus_cat_file *file = &entry.file;
 520
 521                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 522                         /* panic? */;
 523                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 524                                         sizeof(struct hfsplus_cat_file));
 525
 526                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ?
 527                                         &file->data_fork : &file->rsrc_fork);
 528                 hfsplus_get_perms(inode, &file->permissions, 0);
 529                 inode->i_nlink = 1;
 530                 if (S_ISREG(inode->i_mode)) {
 531                         if (file->permissions.dev)
 532                                 inode->i_nlink = be32_to_cpu(file->permissions.dev);
 533                         inode->i_op = &hfsplus_file_inode_operations;
 534                         inode->i_fop = &hfsplus_file_operations;
 535                         inode->i_mapping->a_ops = &hfsplus_aops;
 536                 } else if (S_ISLNK(inode->i_mode)) {
 537                         inode->i_op = &page_symlink_inode_operations;
 538                         inode->i_mapping->a_ops = &hfsplus_aops;
 539                 } else {
 540                         init_special_inode(inode, inode->i_mode,
 541                                            be32_to_cpu(file->permissions.dev));
 542                 }
 543                 inode->i_atime = hfsp_mt2ut(file->access_date);
 544                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
 545                 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
 546                 HFSPLUS_I(inode)->create_date = file->create_date;
 547         } else {
 548                 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
 549                 res = -EIO;
 550         }
 551         return res;
 552 }
 553
 554 int hfsplus_cat_write_inode(struct inode *inode)
 555 {
 556         struct inode *main_inode = inode;
 557         struct hfs_find_data fd;
 558         hfsplus_cat_entry entry;
 559
 560         if (HFSPLUS_IS_RSRC(inode))
 561                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
 562
 563         if (!main_inode->i_nlink)
 564                 return 0;
 565
 566         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
 567                 /* panic? */
 568                 return -EIO;
 569
 570         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 571                 /* panic? */
 572                 goto out;
 573
 574         if (S_ISDIR(main_inode->i_mode)) {
 575                 struct hfsplus_cat_folder *folder = &entry.folder;
 576
 577                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 578                         /* panic? */;
 579                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 580                                         sizeof(struct hfsplus_cat_folder));
 581                 /* simple node checks? */
 582                 hfsplus_set_perms(inode, &folder->permissions);
 583                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 584                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 585                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 586                 folder->valence = cpu_to_be32(inode->i_size - 2);
 587                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 588                                          sizeof(struct hfsplus_cat_folder));
 589         } else if (HFSPLUS_IS_RSRC(inode)) {
 590                 struct hfsplus_cat_file *file = &entry.file;
 591                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 592                                sizeof(struct hfsplus_cat_file));
 593                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 594                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 595                                 sizeof(struct hfsplus_cat_file));
 596         } else {
 597                 struct hfsplus_cat_file *file = &entry.file;
 598
 599                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 600                         /* panic? */;
 601                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 602                                         sizeof(struct hfsplus_cat_file));
 603                 hfsplus_inode_write_fork(inode, &file->data_fork);
 604                 hfsplus_set_perms(inode, &file->permissions);
 605                 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
 606                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 607                 else
 608                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 609                 file->access_date = hfsp_ut2mt(inode->i_atime);
 610                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 611                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 612                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 613                                          sizeof(struct hfsplus_cat_file));
 614         }
 615 out:
 616         hfs_find_exit(&fd);
 617         return 0;
 618 }