xref: /openbmc/linux/fs/hfsplus/inode.c (revision 55fd7e02)
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