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 #include <linux/fileattr.h>
  21
  22 #include "hfsplus_fs.h"
  23 #include "hfsplus_raw.h"
  24 #include "xattr.h"
  25
  26 static int hfsplus_read_folio(struct file *file, struct folio *folio)
  27 {
  28         return block_read_full_folio(folio, hfsplus_get_block);
  29 }
  30
  31 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
  32 {
  33         struct inode *inode = mapping->host;
  34
  35         if (to > inode->i_size) {
  36                 truncate_pagecache(inode, inode->i_size);
  37                 hfsplus_file_truncate(inode);
  38         }
  39 }
  40
  41 int hfsplus_write_begin(struct file *file, struct address_space *mapping,
  42                 loff_t pos, unsigned len, struct page **pagep, void **fsdata)
  43 {
  44         int ret;
  45
  46         *pagep = NULL;
  47         ret = cont_write_begin(file, mapping, pos, len, pagep, fsdata,
  48                                 hfsplus_get_block,
  49                                 &HFSPLUS_I(mapping->host)->phys_size);
  50         if (unlikely(ret))
  51                 hfsplus_write_failed(mapping, pos + len);
  52
  53         return ret;
  54 }
  55
  56 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  57 {
  58         return generic_block_bmap(mapping, block, hfsplus_get_block);
  59 }
  60
  61 static bool hfsplus_release_folio(struct folio *folio, gfp_t mask)
  62 {
  63         struct inode *inode = folio->mapping->host;
  64         struct super_block *sb = inode->i_sb;
  65         struct hfs_btree *tree;
  66         struct hfs_bnode *node;
  67         u32 nidx;
  68         int i;
  69         bool res = true;
  70
  71         switch (inode->i_ino) {
  72         case HFSPLUS_EXT_CNID:
  73                 tree = HFSPLUS_SB(sb)->ext_tree;
  74                 break;
  75         case HFSPLUS_CAT_CNID:
  76                 tree = HFSPLUS_SB(sb)->cat_tree;
  77                 break;
  78         case HFSPLUS_ATTR_CNID:
  79                 tree = HFSPLUS_SB(sb)->attr_tree;
  80                 break;
  81         default:
  82                 BUG();
  83                 return false;
  84         }
  85         if (!tree)
  86                 return false;
  87         if (tree->node_size >= PAGE_SIZE) {
  88                 nidx = folio->index >>
  89                         (tree->node_size_shift - PAGE_SHIFT);
  90                 spin_lock(&tree->hash_lock);
  91                 node = hfs_bnode_findhash(tree, nidx);
  92                 if (!node)
  93                         ;
  94                 else if (atomic_read(&node->refcnt))
  95                         res = false;
  96                 if (res && node) {
  97                         hfs_bnode_unhash(node);
  98                         hfs_bnode_free(node);
  99                 }
 100                 spin_unlock(&tree->hash_lock);
 101         } else {
 102                 nidx = folio->index <<
 103                         (PAGE_SHIFT - tree->node_size_shift);
 104                 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
 105                 spin_lock(&tree->hash_lock);
 106                 do {
 107                         node = hfs_bnode_findhash(tree, nidx++);
 108                         if (!node)
 109                                 continue;
 110                         if (atomic_read(&node->refcnt)) {
 111                                 res = false;
 112                                 break;
 113                         }
 114                         hfs_bnode_unhash(node);
 115                         hfs_bnode_free(node);
 116                 } while (--i && nidx < tree->node_count);
 117                 spin_unlock(&tree->hash_lock);
 118         }
 119         return res ? try_to_free_buffers(folio) : false;
 120 }
 121
 122 static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 123 {
 124         struct file *file = iocb->ki_filp;
 125         struct address_space *mapping = file->f_mapping;
 126         struct inode *inode = mapping->host;
 127         size_t count = iov_iter_count(iter);
 128         ssize_t ret;
 129
 130         ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
 131
 132         /*
 133          * In case of error extending write may have instantiated a few
 134          * blocks outside i_size. Trim these off again.
 135          */
 136         if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
 137                 loff_t isize = i_size_read(inode);
 138                 loff_t end = iocb->ki_pos + count;
 139
 140                 if (end > isize)
 141                         hfsplus_write_failed(mapping, end);
 142         }
 143
 144         return ret;
 145 }
 146
 147 static int hfsplus_writepages(struct address_space *mapping,
 148                               struct writeback_control *wbc)
 149 {
 150         return mpage_writepages(mapping, wbc, hfsplus_get_block);
 151 }
 152
 153 const struct address_space_operations hfsplus_btree_aops = {
 154         .dirty_folio    = block_dirty_folio,
 155         .invalidate_folio = block_invalidate_folio,
 156         .read_folio     = hfsplus_read_folio,
 157         .writepages     = hfsplus_writepages,
 158         .write_begin    = hfsplus_write_begin,
 159         .write_end      = generic_write_end,
 160         .migrate_folio  = buffer_migrate_folio,
 161         .bmap           = hfsplus_bmap,
 162         .release_folio  = hfsplus_release_folio,
 163 };
 164
 165 const struct address_space_operations hfsplus_aops = {
 166         .dirty_folio    = block_dirty_folio,
 167         .invalidate_folio = block_invalidate_folio,
 168         .read_folio     = hfsplus_read_folio,
 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         .migrate_folio  = buffer_migrate_folio,
 175 };
 176
 177 const struct dentry_operations hfsplus_dentry_operations = {
 178         .d_hash       = hfsplus_hash_dentry,
 179         .d_compare    = hfsplus_compare_dentry,
 180 };
 181
 182 static void hfsplus_get_perms(struct inode *inode,
 183                 struct hfsplus_perm *perms, int dir)
 184 {
 185         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 186         u16 mode;
 187
 188         mode = be16_to_cpu(perms->mode);
 189
 190         i_uid_write(inode, be32_to_cpu(perms->owner));
 191         if ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode))
 192                 inode->i_uid = sbi->uid;
 193
 194         i_gid_write(inode, be32_to_cpu(perms->group));
 195         if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!i_gid_read(inode) && !mode))
 196                 inode->i_gid = sbi->gid;
 197
 198         if (dir) {
 199                 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
 200                 mode |= S_IFDIR;
 201         } else if (!mode)
 202                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
 203         inode->i_mode = mode;
 204
 205         HFSPLUS_I(inode)->userflags = perms->userflags;
 206         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
 207                 inode->i_flags |= S_IMMUTABLE;
 208         else
 209                 inode->i_flags &= ~S_IMMUTABLE;
 210         if (perms->rootflags & HFSPLUS_FLG_APPEND)
 211                 inode->i_flags |= S_APPEND;
 212         else
 213                 inode->i_flags &= ~S_APPEND;
 214 }
 215
 216 static int hfsplus_file_open(struct inode *inode, struct file *file)
 217 {
 218         if (HFSPLUS_IS_RSRC(inode))
 219                 inode = HFSPLUS_I(inode)->rsrc_inode;
 220         if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
 221                 return -EOVERFLOW;
 222         atomic_inc(&HFSPLUS_I(inode)->opencnt);
 223         return 0;
 224 }
 225
 226 static int hfsplus_file_release(struct inode *inode, struct file *file)
 227 {
 228         struct super_block *sb = inode->i_sb;
 229
 230         if (HFSPLUS_IS_RSRC(inode))
 231                 inode = HFSPLUS_I(inode)->rsrc_inode;
 232         if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
 233                 inode_lock(inode);
 234                 hfsplus_file_truncate(inode);
 235                 if (inode->i_flags & S_DEAD) {
 236                         hfsplus_delete_cat(inode->i_ino,
 237                                            HFSPLUS_SB(sb)->hidden_dir, NULL);
 238                         hfsplus_delete_inode(inode);
 239                 }
 240                 inode_unlock(inode);
 241         }
 242         return 0;
 243 }
 244
 245 static int hfsplus_setattr(struct mnt_idmap *idmap,
 246                            struct dentry *dentry, struct iattr *attr)
 247 {
 248         struct inode *inode = d_inode(dentry);
 249         int error;
 250
 251         error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
 252         if (error)
 253                 return error;
 254
 255         if ((attr->ia_valid & ATTR_SIZE) &&
 256             attr->ia_size != i_size_read(inode)) {
 257                 inode_dio_wait(inode);
 258                 if (attr->ia_size > inode->i_size) {
 259                         error = generic_cont_expand_simple(inode,
 260                                                            attr->ia_size);
 261                         if (error)
 262                                 return error;
 263                 }
 264                 truncate_setsize(inode, attr->ia_size);
 265                 hfsplus_file_truncate(inode);
 266                 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
 267         }
 268
 269         setattr_copy(&nop_mnt_idmap, inode, attr);
 270         mark_inode_dirty(inode);
 271
 272         return 0;
 273 }
 274
 275 int hfsplus_getattr(struct mnt_idmap *idmap, const struct path *path,
 276                     struct kstat *stat, u32 request_mask,
 277                     unsigned int query_flags)
 278 {
 279         struct inode *inode = d_inode(path->dentry);
 280         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 281
 282         if (request_mask & STATX_BTIME) {
 283                 stat->result_mask |= STATX_BTIME;
 284                 stat->btime = hfsp_mt2ut(hip->create_date);
 285         }
 286
 287         if (inode->i_flags & S_APPEND)
 288                 stat->attributes |= STATX_ATTR_APPEND;
 289         if (inode->i_flags & S_IMMUTABLE)
 290                 stat->attributes |= STATX_ATTR_IMMUTABLE;
 291         if (hip->userflags & HFSPLUS_FLG_NODUMP)
 292                 stat->attributes |= STATX_ATTR_NODUMP;
 293
 294         stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
 295                                  STATX_ATTR_NODUMP;
 296
 297         generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
 298         return 0;
 299 }
 300
 301 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 302                        int datasync)
 303 {
 304         struct inode *inode = file->f_mapping->host;
 305         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 306         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 307         int error = 0, error2;
 308
 309         error = file_write_and_wait_range(file, start, end);
 310         if (error)
 311                 return error;
 312         inode_lock(inode);
 313
 314         /*
 315          * Sync inode metadata into the catalog and extent trees.
 316          */
 317         sync_inode_metadata(inode, 1);
 318
 319         /*
 320          * And explicitly write out the btrees.
 321          */
 322         if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
 323                 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
 324
 325         if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
 326                 error2 =
 327                         filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
 328                 if (!error)
 329                         error = error2;
 330         }
 331
 332         if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
 333                 if (sbi->attr_tree) {
 334                         error2 =
 335                                 filemap_write_and_wait(
 336                                             sbi->attr_tree->inode->i_mapping);
 337                         if (!error)
 338                                 error = error2;
 339                 } else {
 340                         pr_err("sync non-existent attributes tree\n");
 341                 }
 342         }
 343
 344         if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
 345                 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
 346                 if (!error)
 347                         error = error2;
 348         }
 349
 350         if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
 351                 blkdev_issue_flush(inode->i_sb->s_bdev);
 352
 353         inode_unlock(inode);
 354
 355         return error;
 356 }
 357
 358 static const struct inode_operations hfsplus_file_inode_operations = {
 359         .setattr        = hfsplus_setattr,
 360         .getattr        = hfsplus_getattr,
 361         .listxattr      = hfsplus_listxattr,
 362         .fileattr_get   = hfsplus_fileattr_get,
 363         .fileattr_set   = hfsplus_fileattr_set,
 364 };
 365
 366 static const struct file_operations hfsplus_file_operations = {
 367         .llseek         = generic_file_llseek,
 368         .read_iter      = generic_file_read_iter,
 369         .write_iter     = generic_file_write_iter,
 370         .mmap           = generic_file_mmap,
 371         .splice_read    = filemap_splice_read,
 372         .fsync          = hfsplus_file_fsync,
 373         .open           = hfsplus_file_open,
 374         .release        = hfsplus_file_release,
 375         .unlocked_ioctl = hfsplus_ioctl,
 376 };
 377
 378 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
 379                                 umode_t mode)
 380 {
 381         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 382         struct inode *inode = new_inode(sb);
 383         struct hfsplus_inode_info *hip;
 384
 385         if (!inode)
 386                 return NULL;
 387
 388         inode->i_ino = sbi->next_cnid++;
 389         inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
 390         set_nlink(inode, 1);
 391         simple_inode_init_ts(inode);
 392
 393         hip = HFSPLUS_I(inode);
 394         INIT_LIST_HEAD(&hip->open_dir_list);
 395         spin_lock_init(&hip->open_dir_lock);
 396         mutex_init(&hip->extents_lock);
 397         atomic_set(&hip->opencnt, 0);
 398         hip->extent_state = 0;
 399         hip->flags = 0;
 400         hip->userflags = 0;
 401         hip->subfolders = 0;
 402         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
 403         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 404         hip->alloc_blocks = 0;
 405         hip->first_blocks = 0;
 406         hip->cached_start = 0;
 407         hip->cached_blocks = 0;
 408         hip->phys_size = 0;
 409         hip->fs_blocks = 0;
 410         hip->rsrc_inode = NULL;
 411         if (S_ISDIR(inode->i_mode)) {
 412                 inode->i_size = 2;
 413                 sbi->folder_count++;
 414                 inode->i_op = &hfsplus_dir_inode_operations;
 415                 inode->i_fop = &hfsplus_dir_operations;
 416         } else if (S_ISREG(inode->i_mode)) {
 417                 sbi->file_count++;
 418                 inode->i_op = &hfsplus_file_inode_operations;
 419                 inode->i_fop = &hfsplus_file_operations;
 420                 inode->i_mapping->a_ops = &hfsplus_aops;
 421                 hip->clump_blocks = sbi->data_clump_blocks;
 422         } else if (S_ISLNK(inode->i_mode)) {
 423                 sbi->file_count++;
 424                 inode->i_op = &page_symlink_inode_operations;
 425                 inode_nohighmem(inode);
 426                 inode->i_mapping->a_ops = &hfsplus_aops;
 427                 hip->clump_blocks = 1;
 428         } else
 429                 sbi->file_count++;
 430         insert_inode_hash(inode);
 431         mark_inode_dirty(inode);
 432         hfsplus_mark_mdb_dirty(sb);
 433
 434         return inode;
 435 }
 436
 437 void hfsplus_delete_inode(struct inode *inode)
 438 {
 439         struct super_block *sb = inode->i_sb;
 440
 441         if (S_ISDIR(inode->i_mode)) {
 442                 HFSPLUS_SB(sb)->folder_count--;
 443                 hfsplus_mark_mdb_dirty(sb);
 444                 return;
 445         }
 446         HFSPLUS_SB(sb)->file_count--;
 447         if (S_ISREG(inode->i_mode)) {
 448                 if (!inode->i_nlink) {
 449                         inode->i_size = 0;
 450                         hfsplus_file_truncate(inode);
 451                 }
 452         } else if (S_ISLNK(inode->i_mode)) {
 453                 inode->i_size = 0;
 454                 hfsplus_file_truncate(inode);
 455         }
 456         hfsplus_mark_mdb_dirty(sb);
 457 }
 458
 459 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
 460 {
 461         struct super_block *sb = inode->i_sb;
 462         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 463         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 464         u32 count;
 465         int i;
 466
 467         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
 468         for (count = 0, i = 0; i < 8; i++)
 469                 count += be32_to_cpu(fork->extents[i].block_count);
 470         hip->first_blocks = count;
 471         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 472         hip->cached_start = 0;
 473         hip->cached_blocks = 0;
 474
 475         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
 476         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
 477         hip->fs_blocks =
 478                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
 479         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
 480         hip->clump_blocks =
 481                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
 482         if (!hip->clump_blocks) {
 483                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
 484                         sbi->rsrc_clump_blocks :
 485                         sbi->data_clump_blocks;
 486         }
 487 }
 488
 489 void hfsplus_inode_write_fork(struct inode *inode,
 490                 struct hfsplus_fork_raw *fork)
 491 {
 492         memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
 493                sizeof(hfsplus_extent_rec));
 494         fork->total_size = cpu_to_be64(inode->i_size);
 495         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
 496 }
 497
 498 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
 499 {
 500         hfsplus_cat_entry entry;
 501         int res = 0;
 502         u16 type;
 503
 504         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
 505
 506         HFSPLUS_I(inode)->linkid = 0;
 507         if (type == HFSPLUS_FOLDER) {
 508                 struct hfsplus_cat_folder *folder = &entry.folder;
 509
 510                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) {
 511                         pr_err("bad catalog folder entry\n");
 512                         res = -EIO;
 513                         goto out;
 514                 }
 515                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 516                                         sizeof(struct hfsplus_cat_folder));
 517                 hfsplus_get_perms(inode, &folder->permissions, 1);
 518                 set_nlink(inode, 1);
 519                 inode->i_size = 2 + be32_to_cpu(folder->valence);
 520                 inode_set_atime_to_ts(inode, hfsp_mt2ut(folder->access_date));
 521                 inode_set_mtime_to_ts(inode,
 522                                       hfsp_mt2ut(folder->content_mod_date));
 523                 inode_set_ctime_to_ts(inode,
 524                                       hfsp_mt2ut(folder->attribute_mod_date));
 525                 HFSPLUS_I(inode)->create_date = folder->create_date;
 526                 HFSPLUS_I(inode)->fs_blocks = 0;
 527                 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
 528                         HFSPLUS_I(inode)->subfolders =
 529                                 be32_to_cpu(folder->subfolders);
 530                 }
 531                 inode->i_op = &hfsplus_dir_inode_operations;
 532                 inode->i_fop = &hfsplus_dir_operations;
 533         } else if (type == HFSPLUS_FILE) {
 534                 struct hfsplus_cat_file *file = &entry.file;
 535
 536                 if (fd->entrylength < sizeof(struct hfsplus_cat_file)) {
 537                         pr_err("bad catalog file entry\n");
 538                         res = -EIO;
 539                         goto out;
 540                 }
 541                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
 542                                         sizeof(struct hfsplus_cat_file));
 543
 544                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
 545                                         &file->rsrc_fork : &file->data_fork);
 546                 hfsplus_get_perms(inode, &file->permissions, 0);
 547                 set_nlink(inode, 1);
 548                 if (S_ISREG(inode->i_mode)) {
 549                         if (file->permissions.dev)
 550                                 set_nlink(inode,
 551                                           be32_to_cpu(file->permissions.dev));
 552                         inode->i_op = &hfsplus_file_inode_operations;
 553                         inode->i_fop = &hfsplus_file_operations;
 554                         inode->i_mapping->a_ops = &hfsplus_aops;
 555                 } else if (S_ISLNK(inode->i_mode)) {
 556                         inode->i_op = &page_symlink_inode_operations;
 557                         inode_nohighmem(inode);
 558                         inode->i_mapping->a_ops = &hfsplus_aops;
 559                 } else {
 560                         init_special_inode(inode, inode->i_mode,
 561                                            be32_to_cpu(file->permissions.dev));
 562                 }
 563                 inode_set_atime_to_ts(inode, hfsp_mt2ut(file->access_date));
 564                 inode_set_mtime_to_ts(inode,
 565                                       hfsp_mt2ut(file->content_mod_date));
 566                 inode_set_ctime_to_ts(inode,
 567                                       hfsp_mt2ut(file->attribute_mod_date));
 568                 HFSPLUS_I(inode)->create_date = file->create_date;
 569         } else {
 570                 pr_err("bad catalog entry used to create inode\n");
 571                 res = -EIO;
 572         }
 573 out:
 574         return res;
 575 }
 576
 577 int hfsplus_cat_write_inode(struct inode *inode)
 578 {
 579         struct inode *main_inode = inode;
 580         struct hfs_find_data fd;
 581         hfsplus_cat_entry entry;
 582         int res = 0;
 583
 584         if (HFSPLUS_IS_RSRC(inode))
 585                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
 586
 587         if (!main_inode->i_nlink)
 588                 return 0;
 589
 590         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
 591                 /* panic? */
 592                 return -EIO;
 593
 594         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
 595                 /* panic? */
 596                 goto out;
 597
 598         if (S_ISDIR(main_inode->i_mode)) {
 599                 struct hfsplus_cat_folder *folder = &entry.folder;
 600
 601                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
 602                         pr_err("bad catalog folder entry\n");
 603                         res = -EIO;
 604                         goto out;
 605                 }
 606                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 607                                         sizeof(struct hfsplus_cat_folder));
 608                 /* simple node checks? */
 609                 hfsplus_cat_set_perms(inode, &folder->permissions);
 610                 folder->access_date = hfsp_ut2mt(inode_get_atime(inode));
 611                 folder->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
 612                 folder->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
 613                 folder->valence = cpu_to_be32(inode->i_size - 2);
 614                 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
 615                         folder->subfolders =
 616                                 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
 617                 }
 618                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 619                                          sizeof(struct hfsplus_cat_folder));
 620         } else if (HFSPLUS_IS_RSRC(inode)) {
 621                 struct hfsplus_cat_file *file = &entry.file;
 622                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 623                                sizeof(struct hfsplus_cat_file));
 624                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
 625                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 626                                 sizeof(struct hfsplus_cat_file));
 627         } else {
 628                 struct hfsplus_cat_file *file = &entry.file;
 629
 630                 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
 631                         pr_err("bad catalog file entry\n");
 632                         res = -EIO;
 633                         goto out;
 634                 }
 635                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
 636                                         sizeof(struct hfsplus_cat_file));
 637                 hfsplus_inode_write_fork(inode, &file->data_fork);
 638                 hfsplus_cat_set_perms(inode, &file->permissions);
 639                 if (HFSPLUS_FLG_IMMUTABLE &
 640                                 (file->permissions.rootflags |
 641                                         file->permissions.userflags))
 642                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
 643                 else
 644                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
 645                 file->access_date = hfsp_ut2mt(inode_get_atime(inode));
 646                 file->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
 647                 file->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
 648                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
 649                                          sizeof(struct hfsplus_cat_file));
 650         }
 651
 652         set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
 653 out:
 654         hfs_find_exit(&fd);
 655         return res;
 656 }
 657
 658 int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa)
 659 {
 660         struct inode *inode = d_inode(dentry);
 661         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 662         unsigned int flags = 0;
 663
 664         if (inode->i_flags & S_IMMUTABLE)
 665                 flags |= FS_IMMUTABLE_FL;
 666         if (inode->i_flags & S_APPEND)
 667                 flags |= FS_APPEND_FL;
 668         if (hip->userflags & HFSPLUS_FLG_NODUMP)
 669                 flags |= FS_NODUMP_FL;
 670
 671         fileattr_fill_flags(fa, flags);
 672
 673         return 0;
 674 }
 675
 676 int hfsplus_fileattr_set(struct mnt_idmap *idmap,
 677                          struct dentry *dentry, struct fileattr *fa)
 678 {
 679         struct inode *inode = d_inode(dentry);
 680         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 681         unsigned int new_fl = 0;
 682
 683         if (fileattr_has_fsx(fa))
 684                 return -EOPNOTSUPP;
 685
 686         /* don't silently ignore unsupported ext2 flags */
 687         if (fa->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL))
 688                 return -EOPNOTSUPP;
 689
 690         if (fa->flags & FS_IMMUTABLE_FL)
 691                 new_fl |= S_IMMUTABLE;
 692
 693         if (fa->flags & FS_APPEND_FL)
 694                 new_fl |= S_APPEND;
 695
 696         inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
 697
 698         if (fa->flags & FS_NODUMP_FL)
 699                 hip->userflags |= HFSPLUS_FLG_NODUMP;
 700         else
 701                 hip->userflags &= ~HFSPLUS_FLG_NODUMP;
 702
 703         inode_set_ctime_current(inode);
 704         mark_inode_dirty(inode);
 705
 706         return 0;
 707 }