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Linux/fs/hfsplus/inode.c

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  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 
 21 #include "hfsplus_fs.h"
 22 #include "hfsplus_raw.h"
 23 #include "xattr.h"
 24 
 25 static int hfsplus_readpage(struct file *file, struct page *page)
 26 {
 27         return block_read_full_page(page, hfsplus_get_block);
 28 }
 29 
 30 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
 31 {
 32         return block_write_full_page(page, hfsplus_get_block, wbc);
 33 }
 34 
 35 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
 36 {
 37         struct inode *inode = mapping->host;
 38 
 39         if (to > inode->i_size) {
 40                 truncate_pagecache(inode, inode->i_size);
 41                 hfsplus_file_truncate(inode);
 42         }
 43 }
 44 
 45 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
 46                         loff_t pos, unsigned len, unsigned flags,
 47                         struct page **pagep, void **fsdata)
 48 {
 49         int ret;
 50 
 51         *pagep = NULL;
 52         ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
 53                                 hfsplus_get_block,
 54                                 &HFSPLUS_I(mapping->host)->phys_size);
 55         if (unlikely(ret))
 56                 hfsplus_write_failed(mapping, pos + len);
 57 
 58         return ret;
 59 }
 60 
 61 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
 62 {
 63         return generic_block_bmap(mapping, block, hfsplus_get_block);
 64 }
 65 
 66 static int hfsplus_releasepage(struct page *page, gfp_t mask)
 67 {
 68         struct inode *inode = page->mapping->host;
 69         struct super_block *sb = inode->i_sb;
 70         struct hfs_btree *tree;
 71         struct hfs_bnode *node;
 72         u32 nidx;
 73         int i, res = 1;
 74 
 75         switch (inode->i_ino) {
 76         case HFSPLUS_EXT_CNID:
 77                 tree = HFSPLUS_SB(sb)->ext_tree;
 78                 break;
 79         case HFSPLUS_CAT_CNID:
 80                 tree = HFSPLUS_SB(sb)->cat_tree;
 81                 break;
 82         case HFSPLUS_ATTR_CNID:
 83                 tree = HFSPLUS_SB(sb)->attr_tree;
 84                 break;
 85         default:
 86                 BUG();
 87                 return 0;
 88         }
 89         if (!tree)
 90                 return 0;
 91         if (tree->node_size >= PAGE_SIZE) {
 92                 nidx = page->index >>
 93                         (tree->node_size_shift - PAGE_SHIFT);
 94                 spin_lock(&tree->hash_lock);
 95                 node = hfs_bnode_findhash(tree, nidx);
 96                 if (!node)
 97                         ;
 98                 else if (atomic_read(&node->refcnt))
 99                         res = 0;
100                 if (res && node) {
101                         hfs_bnode_unhash(node);
102                         hfs_bnode_free(node);
103                 }
104                 spin_unlock(&tree->hash_lock);
105         } else {
106                 nidx = page->index <<
107                         (PAGE_SHIFT - tree->node_size_shift);
108                 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
109                 spin_lock(&tree->hash_lock);
110                 do {
111                         node = hfs_bnode_findhash(tree, nidx++);
112                         if (!node)
113                                 continue;
114                         if (atomic_read(&node->refcnt)) {
115                                 res = 0;
116                                 break;
117                         }
118                         hfs_bnode_unhash(node);
119                         hfs_bnode_free(node);
120                 } while (--i && nidx < tree->node_count);
121                 spin_unlock(&tree->hash_lock);
122         }
123         return res ? try_to_free_buffers(page) : 0;
124 }
125 
126 static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
127 {
128         struct file *file = iocb->ki_filp;
129         struct address_space *mapping = file->f_mapping;
130         struct inode *inode = mapping->host;
131         size_t count = iov_iter_count(iter);
132         ssize_t ret;
133 
134         ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
135 
136         /*
137          * In case of error extending write may have instantiated a few
138          * blocks outside i_size. Trim these off again.
139          */
140         if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
141                 loff_t isize = i_size_read(inode);
142                 loff_t end = iocb->ki_pos + count;
143 
144                 if (end > isize)
145                         hfsplus_write_failed(mapping, end);
146         }
147 
148         return ret;
149 }
150 
151 static int hfsplus_writepages(struct address_space *mapping,
152                               struct writeback_control *wbc)
153 {
154         return mpage_writepages(mapping, wbc, hfsplus_get_block);
155 }
156 
157 const struct address_space_operations hfsplus_btree_aops = {
158         .readpage       = hfsplus_readpage,
159         .writepage      = hfsplus_writepage,
160         .write_begin    = hfsplus_write_begin,
161         .write_end      = generic_write_end,
162         .bmap           = hfsplus_bmap,
163         .releasepage    = hfsplus_releasepage,
164 };
165 
166 const struct address_space_operations hfsplus_aops = {
167         .readpage       = hfsplus_readpage,
168         .writepage      = hfsplus_writepage,
169         .write_begin    = hfsplus_write_begin,
170         .write_end      = generic_write_end,
171         .bmap           = hfsplus_bmap,
172         .direct_IO      = hfsplus_direct_IO,
173         .writepages     = hfsplus_writepages,
174 };
175 
176 const struct dentry_operations hfsplus_dentry_operations = {
177         .d_hash       = hfsplus_hash_dentry,
178         .d_compare    = hfsplus_compare_dentry,
179 };
180 
181 static void hfsplus_get_perms(struct inode *inode,
182                 struct hfsplus_perm *perms, int dir)
183 {
184         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
185         u16 mode;
186 
187         mode = be16_to_cpu(perms->mode);
188 
189         i_uid_write(inode, be32_to_cpu(perms->owner));
190         if (!i_uid_read(inode) && !mode)
191                 inode->i_uid = sbi->uid;
192 
193         i_gid_write(inode, be32_to_cpu(perms->group));
194         if (!i_gid_read(inode) && !mode)
195                 inode->i_gid = sbi->gid;
196 
197         if (dir) {
198                 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
199                 mode |= S_IFDIR;
200         } else if (!mode)
201                 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
202         inode->i_mode = mode;
203 
204         HFSPLUS_I(inode)->userflags = perms->userflags;
205         if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
206                 inode->i_flags |= S_IMMUTABLE;
207         else
208                 inode->i_flags &= ~S_IMMUTABLE;
209         if (perms->rootflags & HFSPLUS_FLG_APPEND)
210                 inode->i_flags |= S_APPEND;
211         else
212                 inode->i_flags &= ~S_APPEND;
213 }
214 
215 static int hfsplus_file_open(struct inode *inode, struct file *file)
216 {
217         if (HFSPLUS_IS_RSRC(inode))
218                 inode = HFSPLUS_I(inode)->rsrc_inode;
219         if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
220                 return -EOVERFLOW;
221         atomic_inc(&HFSPLUS_I(inode)->opencnt);
222         return 0;
223 }
224 
225 static int hfsplus_file_release(struct inode *inode, struct file *file)
226 {
227         struct super_block *sb = inode->i_sb;
228 
229         if (HFSPLUS_IS_RSRC(inode))
230                 inode = HFSPLUS_I(inode)->rsrc_inode;
231         if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
232                 inode_lock(inode);
233                 hfsplus_file_truncate(inode);
234                 if (inode->i_flags & S_DEAD) {
235                         hfsplus_delete_cat(inode->i_ino,
236                                            HFSPLUS_SB(sb)->hidden_dir, NULL);
237                         hfsplus_delete_inode(inode);
238                 }
239                 inode_unlock(inode);
240         }
241         return 0;
242 }
243 
244 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
245 {
246         struct inode *inode = d_inode(dentry);
247         int error;
248 
249         error = setattr_prepare(dentry, attr);
250         if (error)
251                 return error;
252 
253         if ((attr->ia_valid & ATTR_SIZE) &&
254             attr->ia_size != i_size_read(inode)) {
255                 inode_dio_wait(inode);
256                 if (attr->ia_size > inode->i_size) {
257                         error = generic_cont_expand_simple(inode,
258                                                            attr->ia_size);
259                         if (error)
260                                 return error;
261                 }
262                 truncate_setsize(inode, attr->ia_size);
263                 hfsplus_file_truncate(inode);
264                 inode->i_mtime = inode->i_ctime = current_time(inode);
265         }
266 
267         setattr_copy(inode, attr);
268         mark_inode_dirty(inode);
269 
270         return 0;
271 }
272 
273 int hfsplus_getattr(const struct path *path, struct kstat *stat,
274                     u32 request_mask, unsigned int query_flags)
275 {
276         struct inode *inode = d_inode(path->dentry);
277         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
278 
279         if (inode->i_flags & S_APPEND)
280                 stat->attributes |= STATX_ATTR_APPEND;
281         if (inode->i_flags & S_IMMUTABLE)
282                 stat->attributes |= STATX_ATTR_IMMUTABLE;
283         if (hip->userflags & HFSPLUS_FLG_NODUMP)
284                 stat->attributes |= STATX_ATTR_NODUMP;
285 
286         stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
287                                  STATX_ATTR_NODUMP;
288 
289         generic_fillattr(inode, stat);
290         return 0;
291 }
292 
293 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
294                        int datasync)
295 {
296         struct inode *inode = file->f_mapping->host;
297         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
298         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
299         int error = 0, error2;
300 
301         error = file_write_and_wait_range(file, start, end);
302         if (error)
303                 return error;
304         inode_lock(inode);
305 
306         /*
307          * Sync inode metadata into the catalog and extent trees.
308          */
309         sync_inode_metadata(inode, 1);
310 
311         /*
312          * And explicitly write out the btrees.
313          */
314         if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
315                 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
316 
317         if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
318                 error2 =
319                         filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
320                 if (!error)
321                         error = error2;
322         }
323 
324         if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
325                 if (sbi->attr_tree) {
326                         error2 =
327                                 filemap_write_and_wait(
328                                             sbi->attr_tree->inode->i_mapping);
329                         if (!error)
330                                 error = error2;
331                 } else {
332                         pr_err("sync non-existent attributes tree\n");
333                 }
334         }
335 
336         if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
337                 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
338                 if (!error)
339                         error = error2;
340         }
341 
342         if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
343                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
344 
345         inode_unlock(inode);
346 
347         return error;
348 }
349 
350 static const struct inode_operations hfsplus_file_inode_operations = {
351         .setattr        = hfsplus_setattr,
352         .getattr        = hfsplus_getattr,
353         .listxattr      = hfsplus_listxattr,
354 };
355 
356 static const struct file_operations hfsplus_file_operations = {
357         .llseek         = generic_file_llseek,
358         .read_iter      = generic_file_read_iter,
359         .write_iter     = generic_file_write_iter,
360         .mmap           = generic_file_mmap,
361         .splice_read    = generic_file_splice_read,
362         .fsync          = hfsplus_file_fsync,
363         .open           = hfsplus_file_open,
364         .release        = hfsplus_file_release,
365         .unlocked_ioctl = hfsplus_ioctl,
366 };
367 
368 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
369                                 umode_t mode)
370 {
371         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
372         struct inode *inode = new_inode(sb);
373         struct hfsplus_inode_info *hip;
374 
375         if (!inode)
376                 return NULL;
377 
378         inode->i_ino = sbi->next_cnid++;
379         inode_init_owner(inode, dir, mode);
380         set_nlink(inode, 1);
381         inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
382 
383         hip = HFSPLUS_I(inode);
384         INIT_LIST_HEAD(&hip->open_dir_list);
385         spin_lock_init(&hip->open_dir_lock);
386         mutex_init(&hip->extents_lock);
387         atomic_set(&hip->opencnt, 0);
388         hip->extent_state = 0;
389         hip->flags = 0;
390         hip->userflags = 0;
391         hip->subfolders = 0;
392         memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
393         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
394         hip->alloc_blocks = 0;
395         hip->first_blocks = 0;
396         hip->cached_start = 0;
397         hip->cached_blocks = 0;
398         hip->phys_size = 0;
399         hip->fs_blocks = 0;
400         hip->rsrc_inode = NULL;
401         if (S_ISDIR(inode->i_mode)) {
402                 inode->i_size = 2;
403                 sbi->folder_count++;
404                 inode->i_op = &hfsplus_dir_inode_operations;
405                 inode->i_fop = &hfsplus_dir_operations;
406         } else if (S_ISREG(inode->i_mode)) {
407                 sbi->file_count++;
408                 inode->i_op = &hfsplus_file_inode_operations;
409                 inode->i_fop = &hfsplus_file_operations;
410                 inode->i_mapping->a_ops = &hfsplus_aops;
411                 hip->clump_blocks = sbi->data_clump_blocks;
412         } else if (S_ISLNK(inode->i_mode)) {
413                 sbi->file_count++;
414                 inode->i_op = &page_symlink_inode_operations;
415                 inode_nohighmem(inode);
416                 inode->i_mapping->a_ops = &hfsplus_aops;
417                 hip->clump_blocks = 1;
418         } else
419                 sbi->file_count++;
420         insert_inode_hash(inode);
421         mark_inode_dirty(inode);
422         hfsplus_mark_mdb_dirty(sb);
423 
424         return inode;
425 }
426 
427 void hfsplus_delete_inode(struct inode *inode)
428 {
429         struct super_block *sb = inode->i_sb;
430 
431         if (S_ISDIR(inode->i_mode)) {
432                 HFSPLUS_SB(sb)->folder_count--;
433                 hfsplus_mark_mdb_dirty(sb);
434                 return;
435         }
436         HFSPLUS_SB(sb)->file_count--;
437         if (S_ISREG(inode->i_mode)) {
438                 if (!inode->i_nlink) {
439                         inode->i_size = 0;
440                         hfsplus_file_truncate(inode);
441                 }
442         } else if (S_ISLNK(inode->i_mode)) {
443                 inode->i_size = 0;
444                 hfsplus_file_truncate(inode);
445         }
446         hfsplus_mark_mdb_dirty(sb);
447 }
448 
449 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
450 {
451         struct super_block *sb = inode->i_sb;
452         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
453         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
454         u32 count;
455         int i;
456 
457         memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
458         for (count = 0, i = 0; i < 8; i++)
459                 count += be32_to_cpu(fork->extents[i].block_count);
460         hip->first_blocks = count;
461         memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
462         hip->cached_start = 0;
463         hip->cached_blocks = 0;
464 
465         hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
466         hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
467         hip->fs_blocks =
468                 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
469         inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
470         hip->clump_blocks =
471                 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
472         if (!hip->clump_blocks) {
473                 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
474                         sbi->rsrc_clump_blocks :
475                         sbi->data_clump_blocks;
476         }
477 }
478 
479 void hfsplus_inode_write_fork(struct inode *inode,
480                 struct hfsplus_fork_raw *fork)
481 {
482         memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
483                sizeof(hfsplus_extent_rec));
484         fork->total_size = cpu_to_be64(inode->i_size);
485         fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
486 }
487 
488 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
489 {
490         hfsplus_cat_entry entry;
491         int res = 0;
492         u16 type;
493 
494         type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
495 
496         HFSPLUS_I(inode)->linkid = 0;
497         if (type == HFSPLUS_FOLDER) {
498                 struct hfsplus_cat_folder *folder = &entry.folder;
499 
500                 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
501                         /* panic? */;
502                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
503                                         sizeof(struct hfsplus_cat_folder));
504                 hfsplus_get_perms(inode, &folder->permissions, 1);
505                 set_nlink(inode, 1);
506                 inode->i_size = 2 + be32_to_cpu(folder->valence);
507                 inode->i_atime = hfsp_mt2ut(folder->access_date);
508                 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
509                 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
510                 HFSPLUS_I(inode)->create_date = folder->create_date;
511                 HFSPLUS_I(inode)->fs_blocks = 0;
512                 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
513                         HFSPLUS_I(inode)->subfolders =
514                                 be32_to_cpu(folder->subfolders);
515                 }
516                 inode->i_op = &hfsplus_dir_inode_operations;
517                 inode->i_fop = &hfsplus_dir_operations;
518         } else if (type == HFSPLUS_FILE) {
519                 struct hfsplus_cat_file *file = &entry.file;
520 
521                 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
522                         /* panic? */;
523                 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
524                                         sizeof(struct hfsplus_cat_file));
525 
526                 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
527                                         &file->rsrc_fork : &file->data_fork);
528                 hfsplus_get_perms(inode, &file->permissions, 0);
529                 set_nlink(inode, 1);
530                 if (S_ISREG(inode->i_mode)) {
531                         if (file->permissions.dev)
532                                 set_nlink(inode,
533                                           be32_to_cpu(file->permissions.dev));
534                         inode->i_op = &hfsplus_file_inode_operations;
535                         inode->i_fop = &hfsplus_file_operations;
536                         inode->i_mapping->a_ops = &hfsplus_aops;
537                 } else if (S_ISLNK(inode->i_mode)) {
538                         inode->i_op = &page_symlink_inode_operations;
539                         inode_nohighmem(inode);
540                         inode->i_mapping->a_ops = &hfsplus_aops;
541                 } else {
542                         init_special_inode(inode, inode->i_mode,
543                                            be32_to_cpu(file->permissions.dev));
544                 }
545                 inode->i_atime = hfsp_mt2ut(file->access_date);
546                 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
547                 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
548                 HFSPLUS_I(inode)->create_date = file->create_date;
549         } else {
550                 pr_err("bad catalog entry used to create inode\n");
551                 res = -EIO;
552         }
553         return res;
554 }
555 
556 int hfsplus_cat_write_inode(struct inode *inode)
557 {
558         struct inode *main_inode = inode;
559         struct hfs_find_data fd;
560         hfsplus_cat_entry entry;
561 
562         if (HFSPLUS_IS_RSRC(inode))
563                 main_inode = HFSPLUS_I(inode)->rsrc_inode;
564 
565         if (!main_inode->i_nlink)
566                 return 0;
567 
568         if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
569                 /* panic? */
570                 return -EIO;
571 
572         if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
573                 /* panic? */
574                 goto out;
575 
576         if (S_ISDIR(main_inode->i_mode)) {
577                 struct hfsplus_cat_folder *folder = &entry.folder;
578 
579                 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
580                         /* panic? */;
581                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
582                                         sizeof(struct hfsplus_cat_folder));
583                 /* simple node checks? */
584                 hfsplus_cat_set_perms(inode, &folder->permissions);
585                 folder->access_date = hfsp_ut2mt(inode->i_atime);
586                 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
587                 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
588                 folder->valence = cpu_to_be32(inode->i_size - 2);
589                 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
590                         folder->subfolders =
591                                 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
592                 }
593                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
594                                          sizeof(struct hfsplus_cat_folder));
595         } else if (HFSPLUS_IS_RSRC(inode)) {
596                 struct hfsplus_cat_file *file = &entry.file;
597                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
598                                sizeof(struct hfsplus_cat_file));
599                 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
600                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
601                                 sizeof(struct hfsplus_cat_file));
602         } else {
603                 struct hfsplus_cat_file *file = &entry.file;
604 
605                 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
606                         /* panic? */;
607                 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
608                                         sizeof(struct hfsplus_cat_file));
609                 hfsplus_inode_write_fork(inode, &file->data_fork);
610                 hfsplus_cat_set_perms(inode, &file->permissions);
611                 if (HFSPLUS_FLG_IMMUTABLE &
612                                 (file->permissions.rootflags |
613                                         file->permissions.userflags))
614                         file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
615                 else
616                         file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
617                 file->access_date = hfsp_ut2mt(inode->i_atime);
618                 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
619                 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
620                 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
621                                          sizeof(struct hfsplus_cat_file));
622         }
623 
624         set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
625 out:
626         hfs_find_exit(&fd);
627         return 0;
628 }
629 

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