linux/fs/hfsplus/inode.c
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   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
  24static int hfsplus_readpage(struct file *file, struct page *page)
  25{
  26        return block_read_full_page(page, hfsplus_get_block);
  27}
  28
  29static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
  30{
  31        return block_write_full_page(page, hfsplus_get_block, wbc);
  32}
  33
  34static 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
  44static 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
  60static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  61{
  62        return generic_block_bmap(mapping, block, hfsplus_get_block);
  63}
  64
  65static 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
 125static 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
 151static int hfsplus_writepages(struct address_space *mapping,
 152                              struct writeback_control *wbc)
 153{
 154        return mpage_writepages(mapping, wbc, hfsplus_get_block);
 155}
 156
 157const 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
 166const 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
 176const struct dentry_operations hfsplus_dentry_operations = {
 177        .d_hash       = hfsplus_hash_dentry,
 178        .d_compare    = hfsplus_compare_dentry,
 179};
 180
 181static 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);
 234out:
 235        d_add(dentry, inode);
 236        return NULL;
 237}
 238
 239static 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
 273static 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
 283static 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
 302static 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
 330int 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
 387static 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
 399static 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
 413struct 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
 470void 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
 492void 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
 522void 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
 531int 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
 594int 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);
 659out:
 660        hfs_find_exit(&fd);
 661        return 0;
 662}
 663
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