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 ([email protected])
   7  * (C) 2003 Ardis Technologies <[email protected]>
   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 user_namespace *mnt_userns,
 245                            struct dentry *dentry, struct iattr *attr)
 246 {
 247         struct inode *inode = d_inode(dentry);
 248         int error;
 249
 250         error = setattr_prepare(&init_user_ns, dentry, attr);
 251         if (error)
 252                 return error;
 253
 254         if ((attr->ia_valid & ATTR_SIZE) &&
 255             attr->ia_size != i_size_read(inode)) {
 256                 inode_dio_wait(inode);
 257                 if (attr->ia_size > inode->i_size) {
 258                         error = generic_cont_expand_simple(inode,
 259                                                            attr->ia_size);
 260                         if (error)
 261                                 return error;
 262                 }
 263                 truncate_setsize(inode, attr->ia_size);
 264                 hfsplus_file_truncate(inode);
 265                 inode->i_mtime = inode->i_ctime = current_time(inode);
 266         }
 267
 268         setattr_copy(&init_user_ns, inode, attr);
 269         mark_inode_dirty(inode);
 270
 271         return 0;
 272 }
 273
 274 int hfsplus_getattr(struct user_namespace *mnt_userns, const struct path *path,
 275                     struct kstat *stat, u32 request_mask,
 276                     unsigned int query_flags)
 277 {
 278         struct inode *inode = d_inode(path->dentry);
 279         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 280
 281         if (inode->i_flags & S_APPEND)
 282                 stat->attributes |= STATX_ATTR_APPEND;
 283         if (inode->i_flags & S_IMMUTABLE)
 284                 stat->attributes |= STATX_ATTR_IMMUTABLE;
 285         if (hip->userflags & HFSPLUS_FLG_NODUMP)
 286                 stat->attributes |= STATX_ATTR_NODUMP;
 287
 288         stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
 289                                  STATX_ATTR_NODUMP;
 290
 291         generic_fillattr(&init_user_ns, inode, stat);
 292         return 0;
 293 }
 294
 295 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 296                        int datasync)
 297 {
 298         struct inode *inode = file->f_mapping->host;
 299         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 300         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 301         int error = 0, error2;
 302
 303         error = file_write_and_wait_range(file, start, end);
 304         if (error)
 305                 return error;
 306         inode_lock(inode);
 307
 308         /*
 309          * Sync inode metadata into the catalog and extent trees.
 310          */
 311         sync_inode_metadata(inode, 1);
 312
 313         /*
 314          * And explicitly write out the btrees.
 315          */
 316         if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
 317                 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
 318
 319         if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
 320                 error2 =
 321                         filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
 322                 if (!error)
 323                         error = error2;
 324         }
 325
 326         if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
 327                 if (sbi->attr_tree) {
 328                         error2 =
 329                                 filemap_write_and_wait(
 330                                             sbi->attr_tree->inode->i_mapping);
 331                         if (!error)
 332                                 error = error2;
 333                 } else {
 334                         pr_err("sync non-existent attributes tree\n");
 335                 }
 336         }
 337
 338         if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
 339                 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
 340                 if (!error)
 341                         error = error2;
 342         }
 343
 344         if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
 345                 blkdev_issue_flush(inode->i_sb->s_bdev);
 346
 347         inode_unlock(inode);
 348
 349         return error;
 350 }
 351
 352 static const struct inode_operations hfsplus_file_inode_operations = {
 353         .setattr        = hfsplus_setattr,
 354         .getattr        = hfsplus_getattr,
 355         .listxattr      = hfsplus_listxattr,
 356 };
 357
 358 static const struct file_operations hfsplus_file_operations = {
 359         .llseek         = generic_file_llseek,
 360         .read_iter      = generic_file_read_iter,
 361         .write_iter     = generic_file_write_iter,
 362         .mmap           = generic_file_mmap,
 363         .splice_read    = generic_file_splice_read,
 364         .fsync          = hfsplus_file_fsync,
 365         .open           = hfsplus_file_open,
 366         .release        = hfsplus_file_release,
 367         .unlocked_ioctl = hfsplus_ioctl,
 368 };
 369
 370 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
 371                                 umode_t mode)
 372 {
 373         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 374         struct inode *inode = new_inode(sb);
 375         struct hfsplus_inode_info *hip;
 376
 377         if (!inode)
 378                 return NULL;
 379
 380         inode->i_ino = sbi->next_cnid++;
 381         inode_init_owner(&init_user_ns, inode, dir, mode);
 382         set_nlink(inode, 1);
 383         inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 384
 385         hip = HFSPLUS_I(inode);
 386         INIT_LIST_HEAD(&hip->open_dir_list);
 387         spin_lock_init(&hip->open_dir_lock);
 388         mutex_init(&hip->extents_lock);
 389         atomic_set(&hip->opencnt, 0);
 390         hip->extent_state = 0;
 391         hip->flags = 0;
 392         hip->userflags = 0;
 393         hip->subfolders = 0;
 394         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 395         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 396         hip->alloc_blocks = 0;
 397         hip->first_blocks = 0;
 398         hip->cached_start = 0;
 399         hip->cached_blocks = 0;
 400         hip->phys_size = 0;
 401         hip->fs_blocks = 0;
 402         hip->rsrc_inode = NULL;
 403         if (S_ISDIR(inode->i_mode)) {
 404                 inode->i_size = 2;
 405                 sbi->folder_count++;
 406                 inode->i_op = &hfsplus_dir_inode_operations;
 407                 inode->i_fop = &hfsplus_dir_operations;
 408         } else if (S_ISREG(inode->i_mode)) {
 409                 sbi->file_count++;
 410                 inode->i_op = &hfsplus_file_inode_operations;
 411                 inode->i_fop = &hfsplus_file_operations;
 412                 inode->i_mapping->a_ops = &hfsplus_aops;
 413                 hip->clump_blocks = sbi->data_clump_blocks;
 414         } else if (S_ISLNK(inode->i_mode)) {
 415                 sbi->file_count++;
 416                 inode->i_op = &page_symlink_inode_operations;
 417                 inode_nohighmem(inode);
 418                 inode->i_mapping->a_ops = &hfsplus_aops;
 419                 hip->clump_blocks = 1;
 420         } else
 421                 sbi->file_count++;
 422         insert_inode_hash(inode);
 423         mark_inode_dirty(inode);
 424         hfsplus_mark_mdb_dirty(sb);
 425
 426         return inode;
 427 }
 428
 429 void hfsplus_delete_inode(struct inode *inode)
 430 {
 431         struct super_block *sb = inode->i_sb;
 432
 433         if (S_ISDIR(inode->i_mode)) {
 434                 HFSPLUS_SB(sb)->folder_count--;
 435                 hfsplus_mark_mdb_dirty(sb);
 436                 return;
 437         }
 438         HFSPLUS_SB(sb)->file_count--;
 439         if (S_ISREG(inode->i_mode)) {
 440                 if (!inode->i_nlink) {
 441                         inode->i_size = 0;
 442                         hfsplus_file_truncate(inode);
 443                 }
 444         } else if (S_ISLNK(inode->i_mode)) {
 445                 inode->i_size = 0;
 446                 hfsplus_file_truncate(inode);
 447         }
 448         hfsplus_mark_mdb_dirty(sb);
 449 }
 450
 451 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 452 {
 453         struct super_block *sb = inode->i_sb;
 454         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 455         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 456         u32 count;
 457         int i;
 458
 459         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
 460         for (count = 0, i = 0; i < 8; i++)
 461                 count += be32_to_cpu(fork->extents[i].block_count);
 462         hip->first_blocks = count;
 463         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 464         hip->cached_start = 0;
 465         hip->cached_blocks = 0;
 466
 467         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
 468         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
 469         hip->fs_blocks =
 470                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 471         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
 472         hip->clump_blocks =
 473                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
 474         if (!hip->clump_blocks) {
 475                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
 476                         sbi->rsrc_clump_blocks :
 477                         sbi->data_clump_blocks;
 478         }
 479 }
 480
 481 void hfsplus_inode_write_fork(struct inode *inode,
 482                 struct hfsplus_fork_raw *fork)
 483 {
 484         memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
 485                sizeof(hfsplus_extent_rec));
 486         fork->total_size = cpu_to_be64(inode->i_size);
 487         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
 488 }
 489
 490 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 491 {
 492         hfsplus_cat_entry entry;
 493         int res = 0;
 494         u16 type;
 495
 496         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 497
 498         HFSPLUS_I(inode)->linkid = 0;
 499         if (type == HFSPLUS_FOLDER) {
 500                 struct hfsplus_cat_folder *folder = &entry.folder;
 501
 502                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
 503                         /* panic? */;
 504                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 505                                         sizeof(struct hfsplus_cat_folder));
 506                 hfsplus_get_perms(inode, &folder->permissions, 1);
 507                 set_nlink(inode, 1);
 508                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 509                 inode->i_atime = hfsp_mt2ut(folder->access_date);
 510                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
 511                 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
 512                 HFSPLUS_I(inode)->create_date = folder->create_date;
 513                 HFSPLUS_I(inode)->fs_blocks = 0;
 514                 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
 515                         HFSPLUS_I(inode)->subfolders =
 516                                 be32_to_cpu(folder->subfolders);
 517                 }
 518                 inode->i_op = &hfsplus_dir_inode_operations;
 519                 inode->i_fop = &hfsplus_dir_operations;
 520         } else if (type == HFSPLUS_FILE) {
 521                 struct hfsplus_cat_file *file = &entry.file;
 522
 523                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 524                         /* panic? */;
 525                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 526                                         sizeof(struct hfsplus_cat_file));
 527
 528                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
 529                                         &file->rsrc_fork : &file->data_fork);
 530                 hfsplus_get_perms(inode, &file->permissions, 0);
 531                 set_nlink(inode, 1);
 532                 if (S_ISREG(inode->i_mode)) {
 533                         if (file->permissions.dev)
 534                                 set_nlink(inode,
 535                                           be32_to_cpu(file->permissions.dev));
 536                         inode->i_op = &hfsplus_file_inode_operations;
 537                         inode->i_fop = &hfsplus_file_operations;
 538                         inode->i_mapping->a_ops = &hfsplus_aops;
 539                 } else if (S_ISLNK(inode->i_mode)) {
 540                         inode->i_op = &page_symlink_inode_operations;
 541                         inode_nohighmem(inode);
 542                         inode->i_mapping->a_ops = &hfsplus_aops;
 543                 } else {
 544                         init_special_inode(inode, inode->i_mode,
 545                                            be32_to_cpu(file->permissions.dev));
 546                 }
 547                 inode->i_atime = hfsp_mt2ut(file->access_date);
 548                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
 549                 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
 550                 HFSPLUS_I(inode)->create_date = file->create_date;
 551         } else {
 552                 pr_err("bad catalog entry used to create inode\n");
 553                 res = -EIO;
 554         }
 555         return res;
 556 }
 557
 558 int hfsplus_cat_write_inode(struct inode *inode)
 559 {
 560         struct inode *main_inode = inode;
 561         struct hfs_find_data fd;
 562         hfsplus_cat_entry entry;
 563
 564         if (HFSPLUS_IS_RSRC(inode))
 565                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
 566
 567         if (!main_inode->i_nlink)
 568                 return 0;
 569
 570         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
 571                 /* panic? */
 572                 return -EIO;
 573
 574         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 575                 /* panic? */
 576                 goto out;
 577
 578         if (S_ISDIR(main_inode->i_mode)) {
 579                 struct hfsplus_cat_folder *folder = &entry.folder;
 580
 581                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 582                         /* panic? */;
 583                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 584                                         sizeof(struct hfsplus_cat_folder));
 585                 /* simple node checks? */
 586                 hfsplus_cat_set_perms(inode, &folder->permissions);
 587                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 588                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 589                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 590                 folder->valence = cpu_to_be32(inode->i_size - 2);
 591                 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
 592                         folder->subfolders =
 593                                 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
 594                 }
 595                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 596                                          sizeof(struct hfsplus_cat_folder));
 597         } else if (HFSPLUS_IS_RSRC(inode)) {
 598                 struct hfsplus_cat_file *file = &entry.file;
 599                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 600                                sizeof(struct hfsplus_cat_file));
 601                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 602                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 603                                 sizeof(struct hfsplus_cat_file));
 604         } else {
 605                 struct hfsplus_cat_file *file = &entry.file;
 606
 607                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 608                         /* panic? */;
 609                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 610                                         sizeof(struct hfsplus_cat_file));
 611                 hfsplus_inode_write_fork(inode, &file->data_fork);
 612                 hfsplus_cat_set_perms(inode, &file->permissions);
 613                 if (HFSPLUS_FLG_IMMUTABLE &
 614                                 (file->permissions.rootflags |
 615                                         file->permissions.userflags))
 616                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 617                 else
 618                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 619                 file->access_date = hfsp_ut2mt(inode->i_atime);
 620                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 621                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 622                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 623                                          sizeof(struct hfsplus_cat_file));
 624         }
 625
 626         set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
 627 out:
 628         hfs_find_exit(&fd);
 629         return 0;
 630 }