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 #include <linux/aio.h>
  18
  19 #include "hfsplus_fs.h"
  20 #include "hfsplus_raw.h"
  21 #include "xattr.h"
  22 #include "acl.h"
  23
  24 static int hfsplus_readpage(struct file *file, struct page *page)
  25 {
  26         return block_read_full_page(page, hfsplus_get_block);
  27 }
  28
  29 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
  30 {
  31         return block_write_full_page(page, hfsplus_get_block, wbc);
  32 }
  33
  34 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
  35 {
  36         struct inode *inode = mapping->host;
  37
  38         if (to > inode->i_size) {
  39                 truncate_pagecache(inode, inode->i_size);
  40                 hfsplus_file_truncate(inode);
  41         }
  42 }
  43
  44 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
  45                         loff_t pos, unsigned len, unsigned flags,
  46                         struct page **pagep, void **fsdata)
  47 {
  48         int ret;
  49
  50         *pagep = NULL;
  51         ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
  52                                 hfsplus_get_block,
  53                                 &HFSPLUS_I(mapping->host)->phys_size);
  54         if (unlikely(ret))
  55                 hfsplus_write_failed(mapping, pos + len);
  56
  57         return ret;
  58 }
  59
  60 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  61 {
  62         return generic_block_bmap(mapping, block, hfsplus_get_block);
  63 }
  64
  65 static int hfsplus_releasepage(struct page *page, gfp_t mask)
  66 {
  67         struct inode *inode = page->mapping->host;
  68         struct super_block *sb = inode->i_sb;
  69         struct hfs_btree *tree;
  70         struct hfs_bnode *node;
  71         u32 nidx;
  72         int i, res = 1;
  73
  74         switch (inode->i_ino) {
  75         case HFSPLUS_EXT_CNID:
  76                 tree = HFSPLUS_SB(sb)->ext_tree;
  77                 break;
  78         case HFSPLUS_CAT_CNID:
  79                 tree = HFSPLUS_SB(sb)->cat_tree;
  80                 break;
  81         case HFSPLUS_ATTR_CNID:
  82                 tree = HFSPLUS_SB(sb)->attr_tree;
  83                 break;
  84         default:
  85                 BUG();
  86                 return 0;
  87         }
  88         if (!tree)
  89                 return 0;
  90         if (tree->node_size >= PAGE_CACHE_SIZE) {
  91                 nidx = page->index >>
  92                         (tree->node_size_shift - PAGE_CACHE_SHIFT);
  93                 spin_lock(&tree->hash_lock);
  94                 node = hfs_bnode_findhash(tree, nidx);
  95                 if (!node)
  96                         ;
  97                 else if (atomic_read(&node->refcnt))
  98                         res = 0;
  99                 if (res && node) {
 100                         hfs_bnode_unhash(node);
 101                         hfs_bnode_free(node);
 102                 }
 103                 spin_unlock(&tree->hash_lock);
 104         } else {
 105                 nidx = page->index <<
 106                         (PAGE_CACHE_SHIFT - tree->node_size_shift);
 107                 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
 108                 spin_lock(&tree->hash_lock);
 109                 do {
 110                         node = hfs_bnode_findhash(tree, nidx++);
 111                         if (!node)
 112                                 continue;
 113                         if (atomic_read(&node->refcnt)) {
 114                                 res = 0;
 115                                 break;
 116                         }
 117                         hfs_bnode_unhash(node);
 118                         hfs_bnode_free(node);
 119                 } while (--i && nidx < tree->node_count);
 120                 spin_unlock(&tree->hash_lock);
 121         }
 122         return res ? try_to_free_buffers(page) : 0;
 123 }
 124
 125 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
 126                 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
 127 {
 128         struct file *file = iocb->ki_filp;
 129         struct address_space *mapping = file->f_mapping;
 130         struct inode *inode = file_inode(file)->i_mapping->host;
 131         ssize_t ret;
 132
 133         ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
 134                                  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((rw & WRITE) && ret < 0)) {
 141                 loff_t isize = i_size_read(inode);
 142                 loff_t end = offset + iov_length(iov, nr_segs);
 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 struct dentry *hfsplus_file_lookup(struct inode *dir,
 182                 struct dentry *dentry, unsigned int flags)
 183 {
 184         struct hfs_find_data fd;
 185         struct super_block *sb = dir->i_sb;
 186         struct inode *inode = NULL;
 187         struct hfsplus_inode_info *hip;
 188         int err;
 189
 190         if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
 191                 goto out;
 192
 193         inode = HFSPLUS_I(dir)->rsrc_inode;
 194         if (inode)
 195                 goto out;
 196
 197         inode = new_inode(sb);
 198         if (!inode)
 199                 return ERR_PTR(-ENOMEM);
 200
 201         hip = HFSPLUS_I(inode);
 202         inode->i_ino = dir->i_ino;
 203         INIT_LIST_HEAD(&hip->open_dir_list);
 204         mutex_init(&hip->extents_lock);
 205         hip->extent_state = 0;
 206         hip->flags = 0;
 207         hip->userflags = 0;
 208         set_bit(HFSPLUS_I_RSRC, &hip->flags);
 209
 210         err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
 211         if (!err) {
 212                 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
 213                 if (!err)
 214                         err = hfsplus_cat_read_inode(inode, &fd);
 215                 hfs_find_exit(&fd);
 216         }
 217         if (err) {
 218                 iput(inode);
 219                 return ERR_PTR(err);
 220         }
 221         hip->rsrc_inode = dir;
 222         HFSPLUS_I(dir)->rsrc_inode = inode;
 223         igrab(dir);
 224
 225         /*
 226          * __mark_inode_dirty expects inodes to be hashed.  Since we don't
 227          * want resource fork inodes in the regular inode space, we make them
 228          * appear hashed, but do not put on any lists.  hlist_del()
 229          * will work fine and require no locking.
 230          */
 231         hlist_add_fake(&inode->i_hash);
 232
 233         mark_inode_dirty(inode);
 234 out:
 235         d_add(dentry, inode);
 236         return NULL;
 237 }
 238
 239 static void hfsplus_get_perms(struct inode *inode,
 240                 struct hfsplus_perm *perms, int dir)
 241 {
 242         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 243         u16 mode;
 244
 245         mode = be16_to_cpu(perms->mode);
 246
 247         i_uid_write(inode, be32_to_cpu(perms->owner));
 248         if (!i_uid_read(inode) && !mode)
 249                 inode->i_uid = sbi->uid;
 250
 251         i_gid_write(inode, be32_to_cpu(perms->group));
 252         if (!i_gid_read(inode) && !mode)
 253                 inode->i_gid = sbi->gid;
 254
 255         if (dir) {
 256                 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
 257                 mode |= S_IFDIR;
 258         } else if (!mode)
 259                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
 260         inode->i_mode = mode;
 261
 262         HFSPLUS_I(inode)->userflags = perms->userflags;
 263         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
 264                 inode->i_flags |= S_IMMUTABLE;
 265         else
 266                 inode->i_flags &= ~S_IMMUTABLE;
 267         if (perms->rootflags & HFSPLUS_FLG_APPEND)
 268                 inode->i_flags |= S_APPEND;
 269         else
 270                 inode->i_flags &= ~S_APPEND;
 271 }
 272
 273 static int hfsplus_file_open(struct inode *inode, struct file *file)
 274 {
 275         if (HFSPLUS_IS_RSRC(inode))
 276                 inode = HFSPLUS_I(inode)->rsrc_inode;
 277         if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
 278                 return -EOVERFLOW;
 279         atomic_inc(&HFSPLUS_I(inode)->opencnt);
 280         return 0;
 281 }
 282
 283 static int hfsplus_file_release(struct inode *inode, struct file *file)
 284 {
 285         struct super_block *sb = inode->i_sb;
 286
 287         if (HFSPLUS_IS_RSRC(inode))
 288                 inode = HFSPLUS_I(inode)->rsrc_inode;
 289         if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
 290                 mutex_lock(&inode->i_mutex);
 291                 hfsplus_file_truncate(inode);
 292                 if (inode->i_flags & S_DEAD) {
 293                         hfsplus_delete_cat(inode->i_ino,
 294                                            HFSPLUS_SB(sb)->hidden_dir, NULL);
 295                         hfsplus_delete_inode(inode);
 296                 }
 297                 mutex_unlock(&inode->i_mutex);
 298         }
 299         return 0;
 300 }
 301
 302 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 303 {
 304         struct inode *inode = dentry->d_inode;
 305         int error;
 306
 307         error = inode_change_ok(inode, attr);
 308         if (error)
 309                 return error;
 310
 311         if ((attr->ia_valid & ATTR_SIZE) &&
 312             attr->ia_size != i_size_read(inode)) {
 313                 inode_dio_wait(inode);
 314                 truncate_setsize(inode, attr->ia_size);
 315                 hfsplus_file_truncate(inode);
 316         }
 317
 318         setattr_copy(inode, attr);
 319         mark_inode_dirty(inode);
 320
 321         if (attr->ia_valid & ATTR_MODE) {
 322                 error = hfsplus_posix_acl_chmod(inode);
 323                 if (unlikely(error))
 324                         return error;
 325         }
 326
 327         return 0;
 328 }
 329
 330 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 331                        int datasync)
 332 {
 333         struct inode *inode = file->f_mapping->host;
 334         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 335         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 336         int error = 0, error2;
 337
 338         error = filemap_write_and_wait_range(inode->i_mapping, start, end);
 339         if (error)
 340                 return error;
 341         mutex_lock(&inode->i_mutex);
 342
 343         /*
 344          * Sync inode metadata into the catalog and extent trees.
 345          */
 346         sync_inode_metadata(inode, 1);
 347
 348         /*
 349          * And explicitly write out the btrees.
 350          */
 351         if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
 352                 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
 353
 354         if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
 355                 error2 =
 356                         filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
 357                 if (!error)
 358                         error = error2;
 359         }
 360
 361         if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
 362                 if (sbi->attr_tree) {
 363                         error2 =
 364                                 filemap_write_and_wait(
 365                                             sbi->attr_tree->inode->i_mapping);
 366                         if (!error)
 367                                 error = error2;
 368                 } else {
 369                         pr_err("sync non-existent attributes tree\n");
 370                 }
 371         }
 372
 373         if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
 374                 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
 375                 if (!error)
 376                         error = error2;
 377         }
 378
 379         if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
 380                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
 381
 382         mutex_unlock(&inode->i_mutex);
 383
 384         return error;
 385 }
 386
 387 static const struct inode_operations hfsplus_file_inode_operations = {
 388         .lookup         = hfsplus_file_lookup,
 389         .setattr        = hfsplus_setattr,
 390         .setxattr       = generic_setxattr,
 391         .getxattr       = generic_getxattr,
 392         .listxattr      = hfsplus_listxattr,
 393         .removexattr    = hfsplus_removexattr,
 394 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
 395         .get_acl        = hfsplus_get_posix_acl,
 396 #endif
 397 };
 398
 399 static const struct file_operations hfsplus_file_operations = {
 400         .llseek         = generic_file_llseek,
 401         .read           = do_sync_read,
 402         .aio_read       = generic_file_aio_read,
 403         .write          = do_sync_write,
 404         .aio_write      = generic_file_aio_write,
 405         .mmap           = generic_file_mmap,
 406         .splice_read    = generic_file_splice_read,
 407         .fsync          = hfsplus_file_fsync,
 408         .open           = hfsplus_file_open,
 409         .release        = hfsplus_file_release,
 410         .unlocked_ioctl = hfsplus_ioctl,
 411 };
 412
 413 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
 414 {
 415         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 416         struct inode *inode = new_inode(sb);
 417         struct hfsplus_inode_info *hip;
 418
 419         if (!inode)
 420                 return NULL;
 421
 422         inode->i_ino = sbi->next_cnid++;
 423         inode->i_mode = mode;
 424         inode->i_uid = current_fsuid();
 425         inode->i_gid = current_fsgid();
 426         set_nlink(inode, 1);
 427         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 428
 429         hip = HFSPLUS_I(inode);
 430         INIT_LIST_HEAD(&hip->open_dir_list);
 431         mutex_init(&hip->extents_lock);
 432         atomic_set(&hip->opencnt, 0);
 433         hip->extent_state = 0;
 434         hip->flags = 0;
 435         hip->userflags = 0;
 436         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 437         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 438         hip->alloc_blocks = 0;
 439         hip->first_blocks = 0;
 440         hip->cached_start = 0;
 441         hip->cached_blocks = 0;
 442         hip->phys_size = 0;
 443         hip->fs_blocks = 0;
 444         hip->rsrc_inode = NULL;
 445         if (S_ISDIR(inode->i_mode)) {
 446                 inode->i_size = 2;
 447                 sbi->folder_count++;
 448                 inode->i_op = &hfsplus_dir_inode_operations;
 449                 inode->i_fop = &hfsplus_dir_operations;
 450         } else if (S_ISREG(inode->i_mode)) {
 451                 sbi->file_count++;
 452                 inode->i_op = &hfsplus_file_inode_operations;
 453                 inode->i_fop = &hfsplus_file_operations;
 454                 inode->i_mapping->a_ops = &hfsplus_aops;
 455                 hip->clump_blocks = sbi->data_clump_blocks;
 456         } else if (S_ISLNK(inode->i_mode)) {
 457                 sbi->file_count++;
 458                 inode->i_op = &page_symlink_inode_operations;
 459                 inode->i_mapping->a_ops = &hfsplus_aops;
 460                 hip->clump_blocks = 1;
 461         } else
 462                 sbi->file_count++;
 463         insert_inode_hash(inode);
 464         mark_inode_dirty(inode);
 465         hfsplus_mark_mdb_dirty(sb);
 466
 467         return inode;
 468 }
 469
 470 void hfsplus_delete_inode(struct inode *inode)
 471 {
 472         struct super_block *sb = inode->i_sb;
 473
 474         if (S_ISDIR(inode->i_mode)) {
 475                 HFSPLUS_SB(sb)->folder_count--;
 476                 hfsplus_mark_mdb_dirty(sb);
 477                 return;
 478         }
 479         HFSPLUS_SB(sb)->file_count--;
 480         if (S_ISREG(inode->i_mode)) {
 481                 if (!inode->i_nlink) {
 482                         inode->i_size = 0;
 483                         hfsplus_file_truncate(inode);
 484                 }
 485         } else if (S_ISLNK(inode->i_mode)) {
 486                 inode->i_size = 0;
 487                 hfsplus_file_truncate(inode);
 488         }
 489         hfsplus_mark_mdb_dirty(sb);
 490 }
 491
 492 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 493 {
 494         struct super_block *sb = inode->i_sb;
 495         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 496         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 497         u32 count;
 498         int i;
 499
 500         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
 501         for (count = 0, i = 0; i < 8; i++)
 502                 count += be32_to_cpu(fork->extents[i].block_count);
 503         hip->first_blocks = count;
 504         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 505         hip->cached_start = 0;
 506         hip->cached_blocks = 0;
 507
 508         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
 509         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
 510         hip->fs_blocks =
 511                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 512         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
 513         hip->clump_blocks =
 514                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
 515         if (!hip->clump_blocks) {
 516                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
 517                         sbi->rsrc_clump_blocks :
 518                         sbi->data_clump_blocks;
 519         }
 520 }
 521
 522 void hfsplus_inode_write_fork(struct inode *inode,
 523                 struct hfsplus_fork_raw *fork)
 524 {
 525         memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
 526                sizeof(hfsplus_extent_rec));
 527         fork->total_size = cpu_to_be64(inode->i_size);
 528         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
 529 }
 530
 531 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 532 {
 533         hfsplus_cat_entry entry;
 534         int res = 0;
 535         u16 type;
 536
 537         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 538
 539         HFSPLUS_I(inode)->linkid = 0;
 540         if (type == HFSPLUS_FOLDER) {
 541                 struct hfsplus_cat_folder *folder = &entry.folder;
 542
 543                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
 544                         /* panic? */;
 545                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 546                                         sizeof(struct hfsplus_cat_folder));
 547                 hfsplus_get_perms(inode, &folder->permissions, 1);
 548                 set_nlink(inode, 1);
 549                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 550                 inode->i_atime = hfsp_mt2ut(folder->access_date);
 551                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
 552                 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
 553                 HFSPLUS_I(inode)->create_date = folder->create_date;
 554                 HFSPLUS_I(inode)->fs_blocks = 0;
 555                 inode->i_op = &hfsplus_dir_inode_operations;
 556                 inode->i_fop = &hfsplus_dir_operations;
 557         } else if (type == HFSPLUS_FILE) {
 558                 struct hfsplus_cat_file *file = &entry.file;
 559
 560                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
 561                         /* panic? */;
 562                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 563                                         sizeof(struct hfsplus_cat_file));
 564
 565                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
 566                                         &file->rsrc_fork : &file->data_fork);
 567                 hfsplus_get_perms(inode, &file->permissions, 0);
 568                 set_nlink(inode, 1);
 569                 if (S_ISREG(inode->i_mode)) {
 570                         if (file->permissions.dev)
 571                                 set_nlink(inode,
 572                                           be32_to_cpu(file->permissions.dev));
 573                         inode->i_op = &hfsplus_file_inode_operations;
 574                         inode->i_fop = &hfsplus_file_operations;
 575                         inode->i_mapping->a_ops = &hfsplus_aops;
 576                 } else if (S_ISLNK(inode->i_mode)) {
 577                         inode->i_op = &page_symlink_inode_operations;
 578                         inode->i_mapping->a_ops = &hfsplus_aops;
 579                 } else {
 580                         init_special_inode(inode, inode->i_mode,
 581                                            be32_to_cpu(file->permissions.dev));
 582                 }
 583                 inode->i_atime = hfsp_mt2ut(file->access_date);
 584                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
 585                 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
 586                 HFSPLUS_I(inode)->create_date = file->create_date;
 587         } else {
 588                 pr_err("bad catalog entry used to create inode\n");
 589                 res = -EIO;
 590         }
 591         return res;
 592 }
 593
 594 int hfsplus_cat_write_inode(struct inode *inode)
 595 {
 596         struct inode *main_inode = inode;
 597         struct hfs_find_data fd;
 598         hfsplus_cat_entry entry;
 599
 600         if (HFSPLUS_IS_RSRC(inode))
 601                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
 602
 603         if (!main_inode->i_nlink)
 604                 return 0;
 605
 606         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
 607                 /* panic? */
 608                 return -EIO;
 609
 610         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 611                 /* panic? */
 612                 goto out;
 613
 614         if (S_ISDIR(main_inode->i_mode)) {
 615                 struct hfsplus_cat_folder *folder = &entry.folder;
 616
 617                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
 618                         /* panic? */;
 619                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 620                                         sizeof(struct hfsplus_cat_folder));
 621                 /* simple node checks? */
 622                 hfsplus_cat_set_perms(inode, &folder->permissions);
 623                 folder->access_date = hfsp_ut2mt(inode->i_atime);
 624                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 625                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 626                 folder->valence = cpu_to_be32(inode->i_size - 2);
 627                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 628                                          sizeof(struct hfsplus_cat_folder));
 629         } else if (HFSPLUS_IS_RSRC(inode)) {
 630                 struct hfsplus_cat_file *file = &entry.file;
 631                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 632                                sizeof(struct hfsplus_cat_file));
 633                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 634                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 635                                 sizeof(struct hfsplus_cat_file));
 636         } else {
 637                 struct hfsplus_cat_file *file = &entry.file;
 638
 639                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
 640                         /* panic? */;
 641                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 642                                         sizeof(struct hfsplus_cat_file));
 643                 hfsplus_inode_write_fork(inode, &file->data_fork);
 644                 hfsplus_cat_set_perms(inode, &file->permissions);
 645                 if (HFSPLUS_FLG_IMMUTABLE &
 646                                 (file->permissions.rootflags |
 647                                         file->permissions.userflags))
 648                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 649                 else
 650                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 651                 file->access_date = hfsp_ut2mt(inode->i_atime);
 652                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
 653                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
 654                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 655                                          sizeof(struct hfsplus_cat_file));
 656         }
 657
 658         set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
 659 out:
 660         hfs_find_exit(&fd);
 661         return 0;
 662 }