xref: /openbmc/linux/fs/hfsplus/inode.c (revision b78412b8)
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/cred.h>
18 #include <linux/uio.h>
19 
20 #include "hfsplus_fs.h"
21 #include "hfsplus_raw.h"
22 #include "xattr.h"
23 #include "acl.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 	}
265 
266 	setattr_copy(inode, attr);
267 	mark_inode_dirty(inode);
268 
269 	if (attr->ia_valid & ATTR_MODE) {
270 		error = posix_acl_chmod(inode, inode->i_mode);
271 		if (unlikely(error))
272 			return error;
273 	}
274 
275 	return 0;
276 }
277 
278 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
279 		       int datasync)
280 {
281 	struct inode *inode = file->f_mapping->host;
282 	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
283 	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
284 	int error = 0, error2;
285 
286 	error = file_write_and_wait_range(file, start, end);
287 	if (error)
288 		return error;
289 	inode_lock(inode);
290 
291 	/*
292 	 * Sync inode metadata into the catalog and extent trees.
293 	 */
294 	sync_inode_metadata(inode, 1);
295 
296 	/*
297 	 * And explicitly write out the btrees.
298 	 */
299 	if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
300 		error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
301 
302 	if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
303 		error2 =
304 			filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
305 		if (!error)
306 			error = error2;
307 	}
308 
309 	if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
310 		if (sbi->attr_tree) {
311 			error2 =
312 				filemap_write_and_wait(
313 					    sbi->attr_tree->inode->i_mapping);
314 			if (!error)
315 				error = error2;
316 		} else {
317 			pr_err("sync non-existent attributes tree\n");
318 		}
319 	}
320 
321 	if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
322 		error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
323 		if (!error)
324 			error = error2;
325 	}
326 
327 	if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
328 		blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
329 
330 	inode_unlock(inode);
331 
332 	return error;
333 }
334 
335 static const struct inode_operations hfsplus_file_inode_operations = {
336 	.setattr	= hfsplus_setattr,
337 	.listxattr	= hfsplus_listxattr,
338 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
339 	.get_acl	= hfsplus_get_posix_acl,
340 	.set_acl	= hfsplus_set_posix_acl,
341 #endif
342 };
343 
344 static const struct file_operations hfsplus_file_operations = {
345 	.llseek		= generic_file_llseek,
346 	.read_iter	= generic_file_read_iter,
347 	.write_iter	= generic_file_write_iter,
348 	.mmap		= generic_file_mmap,
349 	.splice_read	= generic_file_splice_read,
350 	.fsync		= hfsplus_file_fsync,
351 	.open		= hfsplus_file_open,
352 	.release	= hfsplus_file_release,
353 	.unlocked_ioctl = hfsplus_ioctl,
354 };
355 
356 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
357 {
358 	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
359 	struct inode *inode = new_inode(sb);
360 	struct hfsplus_inode_info *hip;
361 
362 	if (!inode)
363 		return NULL;
364 
365 	inode->i_ino = sbi->next_cnid++;
366 	inode->i_mode = mode;
367 	inode->i_uid = current_fsuid();
368 	inode->i_gid = current_fsgid();
369 	set_nlink(inode, 1);
370 	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
371 
372 	hip = HFSPLUS_I(inode);
373 	INIT_LIST_HEAD(&hip->open_dir_list);
374 	spin_lock_init(&hip->open_dir_lock);
375 	mutex_init(&hip->extents_lock);
376 	atomic_set(&hip->opencnt, 0);
377 	hip->extent_state = 0;
378 	hip->flags = 0;
379 	hip->userflags = 0;
380 	hip->subfolders = 0;
381 	memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
382 	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
383 	hip->alloc_blocks = 0;
384 	hip->first_blocks = 0;
385 	hip->cached_start = 0;
386 	hip->cached_blocks = 0;
387 	hip->phys_size = 0;
388 	hip->fs_blocks = 0;
389 	hip->rsrc_inode = NULL;
390 	if (S_ISDIR(inode->i_mode)) {
391 		inode->i_size = 2;
392 		sbi->folder_count++;
393 		inode->i_op = &hfsplus_dir_inode_operations;
394 		inode->i_fop = &hfsplus_dir_operations;
395 	} else if (S_ISREG(inode->i_mode)) {
396 		sbi->file_count++;
397 		inode->i_op = &hfsplus_file_inode_operations;
398 		inode->i_fop = &hfsplus_file_operations;
399 		inode->i_mapping->a_ops = &hfsplus_aops;
400 		hip->clump_blocks = sbi->data_clump_blocks;
401 	} else if (S_ISLNK(inode->i_mode)) {
402 		sbi->file_count++;
403 		inode->i_op = &page_symlink_inode_operations;
404 		inode_nohighmem(inode);
405 		inode->i_mapping->a_ops = &hfsplus_aops;
406 		hip->clump_blocks = 1;
407 	} else
408 		sbi->file_count++;
409 	insert_inode_hash(inode);
410 	mark_inode_dirty(inode);
411 	hfsplus_mark_mdb_dirty(sb);
412 
413 	return inode;
414 }
415 
416 void hfsplus_delete_inode(struct inode *inode)
417 {
418 	struct super_block *sb = inode->i_sb;
419 
420 	if (S_ISDIR(inode->i_mode)) {
421 		HFSPLUS_SB(sb)->folder_count--;
422 		hfsplus_mark_mdb_dirty(sb);
423 		return;
424 	}
425 	HFSPLUS_SB(sb)->file_count--;
426 	if (S_ISREG(inode->i_mode)) {
427 		if (!inode->i_nlink) {
428 			inode->i_size = 0;
429 			hfsplus_file_truncate(inode);
430 		}
431 	} else if (S_ISLNK(inode->i_mode)) {
432 		inode->i_size = 0;
433 		hfsplus_file_truncate(inode);
434 	}
435 	hfsplus_mark_mdb_dirty(sb);
436 }
437 
438 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
439 {
440 	struct super_block *sb = inode->i_sb;
441 	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
442 	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
443 	u32 count;
444 	int i;
445 
446 	memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
447 	for (count = 0, i = 0; i < 8; i++)
448 		count += be32_to_cpu(fork->extents[i].block_count);
449 	hip->first_blocks = count;
450 	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
451 	hip->cached_start = 0;
452 	hip->cached_blocks = 0;
453 
454 	hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
455 	hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
456 	hip->fs_blocks =
457 		(inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
458 	inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
459 	hip->clump_blocks =
460 		be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
461 	if (!hip->clump_blocks) {
462 		hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
463 			sbi->rsrc_clump_blocks :
464 			sbi->data_clump_blocks;
465 	}
466 }
467 
468 void hfsplus_inode_write_fork(struct inode *inode,
469 		struct hfsplus_fork_raw *fork)
470 {
471 	memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
472 	       sizeof(hfsplus_extent_rec));
473 	fork->total_size = cpu_to_be64(inode->i_size);
474 	fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
475 }
476 
477 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
478 {
479 	hfsplus_cat_entry entry;
480 	int res = 0;
481 	u16 type;
482 
483 	type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
484 
485 	HFSPLUS_I(inode)->linkid = 0;
486 	if (type == HFSPLUS_FOLDER) {
487 		struct hfsplus_cat_folder *folder = &entry.folder;
488 
489 		if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
490 			/* panic? */;
491 		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
492 					sizeof(struct hfsplus_cat_folder));
493 		hfsplus_get_perms(inode, &folder->permissions, 1);
494 		set_nlink(inode, 1);
495 		inode->i_size = 2 + be32_to_cpu(folder->valence);
496 		inode->i_atime = hfsp_mt2ut(folder->access_date);
497 		inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
498 		inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
499 		HFSPLUS_I(inode)->create_date = folder->create_date;
500 		HFSPLUS_I(inode)->fs_blocks = 0;
501 		if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
502 			HFSPLUS_I(inode)->subfolders =
503 				be32_to_cpu(folder->subfolders);
504 		}
505 		inode->i_op = &hfsplus_dir_inode_operations;
506 		inode->i_fop = &hfsplus_dir_operations;
507 	} else if (type == HFSPLUS_FILE) {
508 		struct hfsplus_cat_file *file = &entry.file;
509 
510 		if (fd->entrylength < sizeof(struct hfsplus_cat_file))
511 			/* panic? */;
512 		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
513 					sizeof(struct hfsplus_cat_file));
514 
515 		hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
516 					&file->rsrc_fork : &file->data_fork);
517 		hfsplus_get_perms(inode, &file->permissions, 0);
518 		set_nlink(inode, 1);
519 		if (S_ISREG(inode->i_mode)) {
520 			if (file->permissions.dev)
521 				set_nlink(inode,
522 					  be32_to_cpu(file->permissions.dev));
523 			inode->i_op = &hfsplus_file_inode_operations;
524 			inode->i_fop = &hfsplus_file_operations;
525 			inode->i_mapping->a_ops = &hfsplus_aops;
526 		} else if (S_ISLNK(inode->i_mode)) {
527 			inode->i_op = &page_symlink_inode_operations;
528 			inode_nohighmem(inode);
529 			inode->i_mapping->a_ops = &hfsplus_aops;
530 		} else {
531 			init_special_inode(inode, inode->i_mode,
532 					   be32_to_cpu(file->permissions.dev));
533 		}
534 		inode->i_atime = hfsp_mt2ut(file->access_date);
535 		inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
536 		inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
537 		HFSPLUS_I(inode)->create_date = file->create_date;
538 	} else {
539 		pr_err("bad catalog entry used to create inode\n");
540 		res = -EIO;
541 	}
542 	return res;
543 }
544 
545 int hfsplus_cat_write_inode(struct inode *inode)
546 {
547 	struct inode *main_inode = inode;
548 	struct hfs_find_data fd;
549 	hfsplus_cat_entry entry;
550 
551 	if (HFSPLUS_IS_RSRC(inode))
552 		main_inode = HFSPLUS_I(inode)->rsrc_inode;
553 
554 	if (!main_inode->i_nlink)
555 		return 0;
556 
557 	if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
558 		/* panic? */
559 		return -EIO;
560 
561 	if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
562 		/* panic? */
563 		goto out;
564 
565 	if (S_ISDIR(main_inode->i_mode)) {
566 		struct hfsplus_cat_folder *folder = &entry.folder;
567 
568 		if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
569 			/* panic? */;
570 		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
571 					sizeof(struct hfsplus_cat_folder));
572 		/* simple node checks? */
573 		hfsplus_cat_set_perms(inode, &folder->permissions);
574 		folder->access_date = hfsp_ut2mt(inode->i_atime);
575 		folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
576 		folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
577 		folder->valence = cpu_to_be32(inode->i_size - 2);
578 		if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
579 			folder->subfolders =
580 				cpu_to_be32(HFSPLUS_I(inode)->subfolders);
581 		}
582 		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
583 					 sizeof(struct hfsplus_cat_folder));
584 	} else if (HFSPLUS_IS_RSRC(inode)) {
585 		struct hfsplus_cat_file *file = &entry.file;
586 		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
587 			       sizeof(struct hfsplus_cat_file));
588 		hfsplus_inode_write_fork(inode, &file->rsrc_fork);
589 		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
590 				sizeof(struct hfsplus_cat_file));
591 	} else {
592 		struct hfsplus_cat_file *file = &entry.file;
593 
594 		if (fd.entrylength < sizeof(struct hfsplus_cat_file))
595 			/* panic? */;
596 		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
597 					sizeof(struct hfsplus_cat_file));
598 		hfsplus_inode_write_fork(inode, &file->data_fork);
599 		hfsplus_cat_set_perms(inode, &file->permissions);
600 		if (HFSPLUS_FLG_IMMUTABLE &
601 				(file->permissions.rootflags |
602 					file->permissions.userflags))
603 			file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
604 		else
605 			file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
606 		file->access_date = hfsp_ut2mt(inode->i_atime);
607 		file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
608 		file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
609 		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
610 					 sizeof(struct hfsplus_cat_file));
611 	}
612 
613 	set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
614 out:
615 	hfs_find_exit(&fd);
616 	return 0;
617 }
618