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