fs/hfsplus/inode.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/fs/hfsplus/inode.c
   4  *
   5  * Copyright (C) 2001
   6  * Brad Boyer (flar@allandria.com)
   7  * (C) 2003 Ardis Technologies <roman@ardistech.com>
   8  *
   9  * Inode handling routines
  10  */
  11
  12 #include <linux/blkdev.h>
  13 #include <linux/mm.h>
  14 #include <linux/fs.h>
  15 #include <linux/pagemap.h>
  16 #include <linux/mpage.h>
  17 #include <linux/sched.h>
  18 #include <linux/cred.h>
  19 #include <linux/uio.h>
  20
  21 #include "hfsplus_fs.h"
  22 #include "hfsplus_raw.h"
  23 #include "xattr.h"
  24
  25 static int hfsplus_readpage(struct file *file, struct page *page)
  26 {
  27         return block_read_full_page(page, hfsplus_get_block);
  28 }
  29
  30 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
  31 {
  32         return block_write_full_page(page, hfsplus_get_block, wbc);
  33 }
  34
  35 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
  36 {
  37         struct inode *inode = mapping->host;
  38
  39         if (to > inode->i_size) {
  40                 truncate_pagecache(inode, inode->i_size);
  41                 hfsplus_file_truncate(inode);
  42         }
  43 }
  44
  45 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
  46                         loff_t pos, unsigned len, unsigned flags,
  47                         struct page **pagep, void **fsdata)
  48 {
  49         int ret;
  50
  51         *pagep = NULL;
  52         ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
  53                                 hfsplus_get_block,
  54                                 &HFSPLUS_I(mapping->host)->phys_size);
  55         if (unlikely(ret))
  56                 hfsplus_write_failed(mapping, pos + len);
  57
  58         return ret;
  59 }
  60
  61 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  62 {
  63         return generic_block_bmap(mapping, block, hfsplus_get_block);
  64 }
  65
  66 static int hfsplus_releasepage(struct page *page, gfp_t mask)
  67 {
  68         struct inode *inode = page->mapping->host;
  69         struct super_block *sb = inode->i_sb;
  70         struct hfs_btree *tree;
  71         struct hfs_bnode *node;
  72         u32 nidx;
  73         int i, res = 1;
  74
  75         switch (inode->i_ino) {
  76         case HFSPLUS_EXT_CNID:
  77                 tree = HFSPLUS_SB(sb)->ext_tree;
  78                 break;
  79         case HFSPLUS_CAT_CNID:
  80                 tree = HFSPLUS_SB(sb)->cat_tree;
  81                 break;
  82         case HFSPLUS_ATTR_CNID:
  83                 tree = HFSPLUS_SB(sb)->attr_tree;
  84                 break;
  85         default:
  86                 BUG();
  87                 return 0;
  88         }
  89         if (!tree)
  90                 return 0;
  91         if (tree->node_size >= PAGE_SIZE) {
  92                 nidx = page->index >>
  93                         (tree->node_size_shift - PAGE_SHIFT);
  94                 spin_lock(&tree->hash_lock);
  95                 node = hfs_bnode_findhash(tree, nidx);
  96                 if (!node)
  97                         ;
  98                 else if (atomic_read(&node->refcnt))
  99                         res = 0;
 100                 if (res && node) {
 101                         hfs_bnode_unhash(node);
 102                         hfs_bnode_free(node);
 103                 }
 104                 spin_unlock(&tree->hash_lock);
 105         } else {
 106                 nidx = page->index <<
 107                         (PAGE_SHIFT - tree->node_size_shift);
 108                 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
 109                 spin_lock(&tree->hash_lock);
 110                 do {
 111                         node = hfs_bnode_findhash(tree, nidx++);
 112                         if (!node)
 113                                 continue;
 114                         if (atomic_read(&node->refcnt)) {
 115                                 res = 0;
 116                                 break;
 117                         }
 118                         hfs_bnode_unhash(node);
 119                         hfs_bnode_free(node);
 120                 } while (--i && nidx < tree->node_count);
 121                 spin_unlock(&tree->hash_lock);
 122         }
 123         return res ? try_to_free_buffers(page) : 0;
 124 }
 125
 126 static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 127 {
 128         struct file *file = iocb->ki_filp;
 129         struct address_space *mapping = file->f_mapping;
 130         struct inode *inode = mapping->host;
 131         size_t count = iov_iter_count(iter);
 132         ssize_t ret;
 133
 134         ret = blockdev_direct_IO(iocb, inode, iter, 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(iov_iter_rw(iter) == WRITE && ret < 0)) {
 141                 loff_t isize = i_size_read(inode);
 142                 loff_t end = iocb->ki_pos + count;
 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                 inode_lock(inode);
 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                 inode_unlock(inode);
 240         }
 241         return 0;
 242 }
 243
 244 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 245 {
 246         struct inode *inode = d_inode(dentry);
 247         int error;
 248
 249         error = setattr_prepare(dentry, 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                 if (attr->ia_size > inode->i_size) {
 257                         error = generic_cont_expand_simple(inode,
 258                                                            attr->ia_size);
 259                         if (error)
 260                                 return error;
 261                 }
 262                 truncate_setsize(inode, attr->ia_size);
 263                 hfsplus_file_truncate(inode);
 264                 inode->i_mtime = inode->i_ctime = current_time(inode);
 265         }
 266
 267         setattr_copy(inode, attr);
 268         mark_inode_dirty(inode);
 269
 270         return 0;
 271 }
 272
 273 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 274                        int datasync)
 275 {
 276         struct inode *inode = file->f_mapping->host;
 277         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 278         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 279         int error = 0, error2;
 280
 281         error = file_write_and_wait_range(file, start, end);
 282         if (error)
 283                 return error;
 284         inode_lock(inode);
 285
 286         /*
 287          * Sync inode metadata into the catalog and extent trees.
 288          */
 289         sync_inode_metadata(inode, 1);
 290
 291         /*
 292          * And explicitly write out the btrees.
 293          */
 294         if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
 295                 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
 296
 297         if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
 298                 error2 =
 299                         filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
 300                 if (!error)
 301                         error = error2;
 302         }
 303
 304         if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
 305                 if (sbi->attr_tree) {
 306                         error2 =
 307                                 filemap_write_and_wait(
 308                                             sbi->attr_tree->inode->i_mapping);
 309                         if (!error)
 310                                 error = error2;
 311                 } else {
 312                         pr_err("sync non-existent attributes tree\n");
 313                 }
 314         }
 315
 316         if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
 317                 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
 318                 if (!error)
 319                         error = error2;
 320         }
 321
 322         if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
 323                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
 324
 325         inode_unlock(inode);
 326
 327         return error;
 328 }
 329
 330 static const struct inode_operations hfsplus_file_inode_operations = {
 331         .setattr        = hfsplus_setattr,
 332         .listxattr      = hfsplus_listxattr,
 333 };
 334
 335 static const struct file_operations hfsplus_file_operations = {
 336         .llseek         = generic_file_llseek,
 337         .read_iter      = generic_file_read_iter,
 338         .write_iter     = generic_file_write_iter,
 339         .mmap           = generic_file_mmap,
 340         .splice_read    = generic_file_splice_read,
 341         .fsync          = hfsplus_file_fsync,
 342         .open           = hfsplus_file_open,
 343         .release        = hfsplus_file_release,
 344         .unlocked_ioctl = hfsplus_ioctl,
 345 };
 346
 347 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
 348                                 umode_t mode)
 349 {
 350         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 351         struct inode *inode = new_inode(sb);
 352         struct hfsplus_inode_info *hip;
 353
 354         if (!inode)
 355                 return NULL;
 356
 357         inode->i_ino = sbi->next_cnid++;
 358         inode_init_owner(inode, dir, mode);
 359         set_nlink(inode, 1);
 360         inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 361
 362         hip = HFSPLUS_I(inode);
 363         INIT_LIST_HEAD(&hip->open_dir_list);
 364         spin_lock_init(&hip->open_dir_lock);
 365         mutex_init(&hip->extents_lock);
 366         atomic_set(&hip->opencnt, 0);
 367         hip->extent_state = 0;
 368         hip->flags = 0;
 369         hip->userflags = 0;
 370         hip->subfolders = 0;
 371         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 372         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 373         hip->alloc_blocks = 0;
 374         hip->first_blocks = 0;
 375         hip->cached_start = 0;
 376         hip->cached_blocks = 0;
 377         hip->phys_size = 0;
 378         hip->fs_blocks = 0;
 379         hip->rsrc_inode = NULL;
 380         if (S_ISDIR(inode->i_mode)) {
 381                 inode->i_size = 2;
 382                 sbi->folder_count++;
 383                 inode->i_op = &hfsplus_dir_inode_operations;
 384                 inode->i_fop = &hfsplus_dir_operations;
 385         } else if (S_ISREG(inode->i_mode)) {
 386                 sbi->file_count++;
 387                 inode->i_op = &hfsplus_file_inode_operations;
 388                 inode->i_fop = &hfsplus_file_operations;
 389                 inode->i_mapping->a_ops = &hfsplus_aops;
 390                 hip->clump_blocks = sbi->data_clump_blocks;
 391         } else if (S_ISLNK(inode->i_mode)) {
 392                 sbi->file_count++;
 393                 inode->i_op = &page_symlink_inode_operations;
 394                 inode_nohighmem(inode);
 395                 inode->i_mapping->a_ops = &hfsplus_aops;
 396                 hip->clump_blocks = 1;
 397         } else
 398                 sbi->file_count++;
 399         insert_inode_hash(inode);
 400         mark_inode_dirty(inode);
 401         hfsplus_mark_mdb_dirty(sb);
 402
 403         return inode;
 404 }
 405
 406 void hfsplus_delete_inode(struct inode *inode)
 407 {
 408         struct super_block *sb = inode->i_sb;
 409
 410         if (S_ISDIR(inode->i_mode)) {
 411                 HFSPLUS_SB(sb)->folder_count--;
 412                 hfsplus_mark_mdb_dirty(sb);
 413                 return;
 414         }
 415         HFSPLUS_SB(sb)->file_count--;
 416         if (S_ISREG(inode->i_mode)) {
 417                 if (!inode->i_nlink) {
 418                         inode->i_size = 0;
 419                         hfsplus_file_truncate(inode);
 420                 }
 421         } else if (S_ISLNK(inode->i_mode)) {
 422                 inode->i_size = 0;
 423                 hfsplus_file_truncate(inode);
 424         }
 425         hfsplus_mark_mdb_dirty(sb);
 426 }
 427
 428 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 429 {
 430         struct super_block *sb = inode->i_sb;
 431         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 432         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 433         u32 count;
 434         int i;
 435
 436         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
 437         for (count = 0, i = 0; i < 8; i++)
 438                 count += be32_to_cpu(fork->extents[i].block_count);
 439         hip->first_blocks = count;
 440         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 441         hip->cached_start = 0;
 442         hip->cached_blocks = 0;
 443
 444         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
 445         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
 446         hip->fs_blocks =
 447                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 448         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
 449         hip->clump_blocks =
 450                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
 451         if (!hip->clump_blocks) {
 452                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
 453                         sbi->rsrc_clump_blocks :
 454                         sbi->data_clump_blocks;
 455         }
 456 }
 457
 458 void hfsplus_inode_write_fork(struct inode *inode,
 459                 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)->linkid = 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                 set_nlink(inode, 1);
 485                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 486                 inode->i_atime = timespec_to_timespec64(hfsp_mt2ut(folder->access_date));
 487                 inode->i_mtime = timespec_to_timespec64(hfsp_mt2ut(folder->content_mod_date));
 488                 inode->i_ctime = timespec_to_timespec64(hfsp_mt2ut(folder->attribute_mod_date));
 489                 HFSPLUS_I(inode)->create_date = folder->create_date;
 490                 HFSPLUS_I(inode)->fs_blocks = 0;
 491                 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
 492                         HFSPLUS_I(inode)->subfolders =
 493                                 be32_to_cpu(folder->subfolders);
 494                 }
 495                 inode->i_op = &hfsplus_dir_inode_operations;
 496                 inode->i_fop = &hfsplus_dir_operations;
 497         } else if (type == HFSPLUS_FILE) {
 498                 struct hfsplus_cat_file *file = &entry.file;
 499
 500                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 501                         /* panic? */;
 502                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 503                                         sizeof(struct hfsplus_cat_file));
 504
 505                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
 506                                         &file->rsrc_fork : &file->data_fork);
 507                 hfsplus_get_perms(inode, &file->permissions, 0);
 508                 set_nlink(inode, 1);
 509                 if (S_ISREG(inode->i_mode)) {
 510                         if (file->permissions.dev)
 511                                 set_nlink(inode,
 512                                           be32_to_cpu(file->permissions.dev));
 513                         inode->i_op = &hfsplus_file_inode_operations;
 514                         inode->i_fop = &hfsplus_file_operations;
 515                         inode->i_mapping->a_ops = &hfsplus_aops;
 516                 } else if (S_ISLNK(inode->i_mode)) {
 517                         inode->i_op = &page_symlink_inode_operations;
 518                         inode_nohighmem(inode);
 519                         inode->i_mapping->a_ops = &hfsplus_aops;
 520                 } else {
 521                         init_special_inode(inode, inode->i_mode,
 522                                            be32_to_cpu(file->permissions.dev));
 523                 }
 524                 inode->i_atime = timespec_to_timespec64(hfsp_mt2ut(file->access_date));
 525                 inode->i_mtime = timespec_to_timespec64(hfsp_mt2ut(file->content_mod_date));
 526                 inode->i_ctime = timespec_to_timespec64(hfsp_mt2ut(file->attribute_mod_date));
 527                 HFSPLUS_I(inode)->create_date = file->create_date;
 528         } else {
 529                 pr_err("bad catalog entry used to create inode\n");
 530                 res = -EIO;
 531         }
 532         return res;
 533 }
 534
 535 int hfsplus_cat_write_inode(struct inode *inode)
 536 {
 537         struct inode *main_inode = inode;
 538         struct hfs_find_data fd;
 539         hfsplus_cat_entry entry;
 540
 541         if (HFSPLUS_IS_RSRC(inode))
 542                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
 543
 544         if (!main_inode->i_nlink)
 545                 return 0;
 546
 547         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
 548                 /* panic? */
 549                 return -EIO;
 550
 551         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 552                 /* panic? */
 553                 goto out;
 554
 555         if (S_ISDIR(main_inode->i_mode)) {
 556                 struct hfsplus_cat_folder *folder = &entry.folder;
 557
 558                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 559                         /* panic? */;
 560                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 561                                         sizeof(struct hfsplus_cat_folder));
 562                 /* simple node checks? */
 563                 hfsplus_cat_set_perms(inode, &folder->permissions);
 564                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 565                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 566                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 567                 folder->valence = cpu_to_be32(inode->i_size - 2);
 568                 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
 569                         folder->subfolders =
 570                                 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
 571                 }
 572                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 573                                          sizeof(struct hfsplus_cat_folder));
 574         } else if (HFSPLUS_IS_RSRC(inode)) {
 575                 struct hfsplus_cat_file *file = &entry.file;
 576                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 577                                sizeof(struct hfsplus_cat_file));
 578                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 579                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 580                                 sizeof(struct hfsplus_cat_file));
 581         } else {
 582                 struct hfsplus_cat_file *file = &entry.file;
 583
 584                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 585                         /* panic? */;
 586                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 587                                         sizeof(struct hfsplus_cat_file));
 588                 hfsplus_inode_write_fork(inode, &file->data_fork);
 589                 hfsplus_cat_set_perms(inode, &file->permissions);
 590                 if (HFSPLUS_FLG_IMMUTABLE &
 591                                 (file->permissions.rootflags |
 592                                         file->permissions.userflags))
 593                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 594                 else
 595                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 596                 file->access_date = hfsp_ut2mt(inode->i_atime);
 597                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 598                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 599                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 600                                          sizeof(struct hfsplus_cat_file));
 601         }
 602
 603         set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
 604 out:
 605         hfs_find_exit(&fd);
 606         return 0;
 607 }