xref: /openbmc/linux/fs/f2fs/xattr.c (revision da2ef666) 
1 /*
2  * fs/f2fs/xattr.c
3  *
4  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5  *             http://www.samsung.com/
6  *
7  * Portions of this code from linux/fs/ext2/xattr.c
8  *
9  * Copyright (C) 2001-2003 Andreas Gruenbacher <agruen@suse.de>
10  *
11  * Fix by Harrison Xing <harrison@mountainviewdata.com>.
12  * Extended attributes for symlinks and special files added per
13  *  suggestion of Luka Renko <luka.renko@hermes.si>.
14  * xattr consolidation Copyright (c) 2004 James Morris <jmorris@redhat.com>,
15  *  Red Hat Inc.
16  *
17  * This program is free software; you can redistribute it and/or modify
18  * it under the terms of the GNU General Public License version 2 as
19  * published by the Free Software Foundation.
20  */
21 #include <linux/rwsem.h>
22 #include <linux/f2fs_fs.h>
23 #include <linux/security.h>
24 #include <linux/posix_acl_xattr.h>
25 #include "f2fs.h"
26 #include "xattr.h"
27 
28 static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
29 		struct dentry *unused, struct inode *inode,
30 		const char *name, void *buffer, size_t size)
31 {
32 	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
33 
34 	switch (handler->flags) {
35 	case F2FS_XATTR_INDEX_USER:
36 		if (!test_opt(sbi, XATTR_USER))
37 			return -EOPNOTSUPP;
38 		break;
39 	case F2FS_XATTR_INDEX_TRUSTED:
40 	case F2FS_XATTR_INDEX_SECURITY:
41 		break;
42 	default:
43 		return -EINVAL;
44 	}
45 	return f2fs_getxattr(inode, handler->flags, name,
46 			     buffer, size, NULL);
47 }
48 
49 static int f2fs_xattr_generic_set(const struct xattr_handler *handler,
50 		struct dentry *unused, struct inode *inode,
51 		const char *name, const void *value,
52 		size_t size, int flags)
53 {
54 	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
55 
56 	switch (handler->flags) {
57 	case F2FS_XATTR_INDEX_USER:
58 		if (!test_opt(sbi, XATTR_USER))
59 			return -EOPNOTSUPP;
60 		break;
61 	case F2FS_XATTR_INDEX_TRUSTED:
62 	case F2FS_XATTR_INDEX_SECURITY:
63 		break;
64 	default:
65 		return -EINVAL;
66 	}
67 	return f2fs_setxattr(inode, handler->flags, name,
68 					value, size, NULL, flags);
69 }
70 
71 static bool f2fs_xattr_user_list(struct dentry *dentry)
72 {
73 	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
74 
75 	return test_opt(sbi, XATTR_USER);
76 }
77 
78 static bool f2fs_xattr_trusted_list(struct dentry *dentry)
79 {
80 	return capable(CAP_SYS_ADMIN);
81 }
82 
83 static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
84 		struct dentry *unused, struct inode *inode,
85 		const char *name, void *buffer, size_t size)
86 {
87 	if (buffer)
88 		*((char *)buffer) = F2FS_I(inode)->i_advise;
89 	return sizeof(char);
90 }
91 
92 static int f2fs_xattr_advise_set(const struct xattr_handler *handler,
93 		struct dentry *unused, struct inode *inode,
94 		const char *name, const void *value,
95 		size_t size, int flags)
96 {
97 	unsigned char old_advise = F2FS_I(inode)->i_advise;
98 	unsigned char new_advise;
99 
100 	if (!inode_owner_or_capable(inode))
101 		return -EPERM;
102 	if (value == NULL)
103 		return -EINVAL;
104 
105 	new_advise = *(char *)value;
106 	if (new_advise & ~FADVISE_MODIFIABLE_BITS)
107 		return -EINVAL;
108 
109 	new_advise = new_advise & FADVISE_MODIFIABLE_BITS;
110 	new_advise |= old_advise & ~FADVISE_MODIFIABLE_BITS;
111 
112 	F2FS_I(inode)->i_advise = new_advise;
113 	f2fs_mark_inode_dirty_sync(inode, true);
114 	return 0;
115 }
116 
117 #ifdef CONFIG_F2FS_FS_SECURITY
118 static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
119 		void *page)
120 {
121 	const struct xattr *xattr;
122 	int err = 0;
123 
124 	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
125 		err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY,
126 				xattr->name, xattr->value,
127 				xattr->value_len, (struct page *)page, 0);
128 		if (err < 0)
129 			break;
130 	}
131 	return err;
132 }
133 
134 int f2fs_init_security(struct inode *inode, struct inode *dir,
135 				const struct qstr *qstr, struct page *ipage)
136 {
137 	return security_inode_init_security(inode, dir, qstr,
138 				&f2fs_initxattrs, ipage);
139 }
140 #endif
141 
142 const struct xattr_handler f2fs_xattr_user_handler = {
143 	.prefix	= XATTR_USER_PREFIX,
144 	.flags	= F2FS_XATTR_INDEX_USER,
145 	.list	= f2fs_xattr_user_list,
146 	.get	= f2fs_xattr_generic_get,
147 	.set	= f2fs_xattr_generic_set,
148 };
149 
150 const struct xattr_handler f2fs_xattr_trusted_handler = {
151 	.prefix	= XATTR_TRUSTED_PREFIX,
152 	.flags	= F2FS_XATTR_INDEX_TRUSTED,
153 	.list	= f2fs_xattr_trusted_list,
154 	.get	= f2fs_xattr_generic_get,
155 	.set	= f2fs_xattr_generic_set,
156 };
157 
158 const struct xattr_handler f2fs_xattr_advise_handler = {
159 	.name	= F2FS_SYSTEM_ADVISE_NAME,
160 	.flags	= F2FS_XATTR_INDEX_ADVISE,
161 	.get    = f2fs_xattr_advise_get,
162 	.set    = f2fs_xattr_advise_set,
163 };
164 
165 const struct xattr_handler f2fs_xattr_security_handler = {
166 	.prefix	= XATTR_SECURITY_PREFIX,
167 	.flags	= F2FS_XATTR_INDEX_SECURITY,
168 	.get	= f2fs_xattr_generic_get,
169 	.set	= f2fs_xattr_generic_set,
170 };
171 
172 static const struct xattr_handler *f2fs_xattr_handler_map[] = {
173 	[F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
174 #ifdef CONFIG_F2FS_FS_POSIX_ACL
175 	[F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
176 	[F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
177 #endif
178 	[F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
179 #ifdef CONFIG_F2FS_FS_SECURITY
180 	[F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler,
181 #endif
182 	[F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
183 };
184 
185 const struct xattr_handler *f2fs_xattr_handlers[] = {
186 	&f2fs_xattr_user_handler,
187 #ifdef CONFIG_F2FS_FS_POSIX_ACL
188 	&posix_acl_access_xattr_handler,
189 	&posix_acl_default_xattr_handler,
190 #endif
191 	&f2fs_xattr_trusted_handler,
192 #ifdef CONFIG_F2FS_FS_SECURITY
193 	&f2fs_xattr_security_handler,
194 #endif
195 	&f2fs_xattr_advise_handler,
196 	NULL,
197 };
198 
199 static inline const struct xattr_handler *f2fs_xattr_handler(int index)
200 {
201 	const struct xattr_handler *handler = NULL;
202 
203 	if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
204 		handler = f2fs_xattr_handler_map[index];
205 	return handler;
206 }
207 
208 static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int index,
209 					size_t len, const char *name)
210 {
211 	struct f2fs_xattr_entry *entry;
212 
213 	list_for_each_xattr(entry, base_addr) {
214 		if (entry->e_name_index != index)
215 			continue;
216 		if (entry->e_name_len != len)
217 			continue;
218 		if (!memcmp(entry->e_name, name, len))
219 			break;
220 	}
221 	return entry;
222 }
223 
224 static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode,
225 				void *base_addr, void **last_addr, int index,
226 				size_t len, const char *name)
227 {
228 	struct f2fs_xattr_entry *entry;
229 	unsigned int inline_size = inline_xattr_size(inode);
230 
231 	list_for_each_xattr(entry, base_addr) {
232 		if ((void *)entry + sizeof(__u32) > base_addr + inline_size ||
233 			(void *)XATTR_NEXT_ENTRY(entry) + sizeof(__u32) >
234 			base_addr + inline_size) {
235 			*last_addr = entry;
236 			return NULL;
237 		}
238 		if (entry->e_name_index != index)
239 			continue;
240 		if (entry->e_name_len != len)
241 			continue;
242 		if (!memcmp(entry->e_name, name, len))
243 			break;
244 	}
245 	return entry;
246 }
247 
248 static int read_inline_xattr(struct inode *inode, struct page *ipage,
249 							void *txattr_addr)
250 {
251 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
252 	unsigned int inline_size = inline_xattr_size(inode);
253 	struct page *page = NULL;
254 	void *inline_addr;
255 
256 	if (ipage) {
257 		inline_addr = inline_xattr_addr(inode, ipage);
258 	} else {
259 		page = f2fs_get_node_page(sbi, inode->i_ino);
260 		if (IS_ERR(page))
261 			return PTR_ERR(page);
262 
263 		inline_addr = inline_xattr_addr(inode, page);
264 	}
265 	memcpy(txattr_addr, inline_addr, inline_size);
266 	f2fs_put_page(page, 1);
267 
268 	return 0;
269 }
270 
271 static int read_xattr_block(struct inode *inode, void *txattr_addr)
272 {
273 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
274 	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
275 	unsigned int inline_size = inline_xattr_size(inode);
276 	struct page *xpage;
277 	void *xattr_addr;
278 
279 	/* The inode already has an extended attribute block. */
280 	xpage = f2fs_get_node_page(sbi, xnid);
281 	if (IS_ERR(xpage))
282 		return PTR_ERR(xpage);
283 
284 	xattr_addr = page_address(xpage);
285 	memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE);
286 	f2fs_put_page(xpage, 1);
287 
288 	return 0;
289 }
290 
291 static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
292 				unsigned int index, unsigned int len,
293 				const char *name, struct f2fs_xattr_entry **xe,
294 				void **base_addr)
295 {
296 	void *cur_addr, *txattr_addr, *last_addr = NULL;
297 	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
298 	unsigned int size = xnid ? VALID_XATTR_BLOCK_SIZE : 0;
299 	unsigned int inline_size = inline_xattr_size(inode);
300 	int err = 0;
301 
302 	if (!size && !inline_size)
303 		return -ENODATA;
304 
305 	txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode),
306 			inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS);
307 	if (!txattr_addr)
308 		return -ENOMEM;
309 
310 	/* read from inline xattr */
311 	if (inline_size) {
312 		err = read_inline_xattr(inode, ipage, txattr_addr);
313 		if (err)
314 			goto out;
315 
316 		*xe = __find_inline_xattr(inode, txattr_addr, &last_addr,
317 						index, len, name);
318 		if (*xe)
319 			goto check;
320 	}
321 
322 	/* read from xattr node block */
323 	if (xnid) {
324 		err = read_xattr_block(inode, txattr_addr);
325 		if (err)
326 			goto out;
327 	}
328 
329 	if (last_addr)
330 		cur_addr = XATTR_HDR(last_addr) - 1;
331 	else
332 		cur_addr = txattr_addr;
333 
334 	*xe = __find_xattr(cur_addr, index, len, name);
335 check:
336 	if (IS_XATTR_LAST_ENTRY(*xe)) {
337 		err = -ENODATA;
338 		goto out;
339 	}
340 
341 	*base_addr = txattr_addr;
342 	return 0;
343 out:
344 	kzfree(txattr_addr);
345 	return err;
346 }
347 
348 static int read_all_xattrs(struct inode *inode, struct page *ipage,
349 							void **base_addr)
350 {
351 	struct f2fs_xattr_header *header;
352 	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
353 	unsigned int size = VALID_XATTR_BLOCK_SIZE;
354 	unsigned int inline_size = inline_xattr_size(inode);
355 	void *txattr_addr;
356 	int err;
357 
358 	txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode),
359 			inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS);
360 	if (!txattr_addr)
361 		return -ENOMEM;
362 
363 	/* read from inline xattr */
364 	if (inline_size) {
365 		err = read_inline_xattr(inode, ipage, txattr_addr);
366 		if (err)
367 			goto fail;
368 	}
369 
370 	/* read from xattr node block */
371 	if (xnid) {
372 		err = read_xattr_block(inode, txattr_addr);
373 		if (err)
374 			goto fail;
375 	}
376 
377 	header = XATTR_HDR(txattr_addr);
378 
379 	/* never been allocated xattrs */
380 	if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
381 		header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
382 		header->h_refcount = cpu_to_le32(1);
383 	}
384 	*base_addr = txattr_addr;
385 	return 0;
386 fail:
387 	kzfree(txattr_addr);
388 	return err;
389 }
390 
391 static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
392 				void *txattr_addr, struct page *ipage)
393 {
394 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
395 	size_t inline_size = inline_xattr_size(inode);
396 	struct page *in_page = NULL;
397 	void *xattr_addr;
398 	void *inline_addr = NULL;
399 	struct page *xpage;
400 	nid_t new_nid = 0;
401 	int err = 0;
402 
403 	if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
404 		if (!f2fs_alloc_nid(sbi, &new_nid))
405 			return -ENOSPC;
406 
407 	/* write to inline xattr */
408 	if (inline_size) {
409 		if (ipage) {
410 			inline_addr = inline_xattr_addr(inode, ipage);
411 		} else {
412 			in_page = f2fs_get_node_page(sbi, inode->i_ino);
413 			if (IS_ERR(in_page)) {
414 				f2fs_alloc_nid_failed(sbi, new_nid);
415 				return PTR_ERR(in_page);
416 			}
417 			inline_addr = inline_xattr_addr(inode, in_page);
418 		}
419 
420 		f2fs_wait_on_page_writeback(ipage ? ipage : in_page,
421 							NODE, true);
422 		/* no need to use xattr node block */
423 		if (hsize <= inline_size) {
424 			err = f2fs_truncate_xattr_node(inode);
425 			f2fs_alloc_nid_failed(sbi, new_nid);
426 			if (err) {
427 				f2fs_put_page(in_page, 1);
428 				return err;
429 			}
430 			memcpy(inline_addr, txattr_addr, inline_size);
431 			set_page_dirty(ipage ? ipage : in_page);
432 			goto in_page_out;
433 		}
434 	}
435 
436 	/* write to xattr node block */
437 	if (F2FS_I(inode)->i_xattr_nid) {
438 		xpage = f2fs_get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
439 		if (IS_ERR(xpage)) {
440 			err = PTR_ERR(xpage);
441 			f2fs_alloc_nid_failed(sbi, new_nid);
442 			goto in_page_out;
443 		}
444 		f2fs_bug_on(sbi, new_nid);
445 		f2fs_wait_on_page_writeback(xpage, NODE, true);
446 	} else {
447 		struct dnode_of_data dn;
448 		set_new_dnode(&dn, inode, NULL, NULL, new_nid);
449 		xpage = f2fs_new_node_page(&dn, XATTR_NODE_OFFSET);
450 		if (IS_ERR(xpage)) {
451 			err = PTR_ERR(xpage);
452 			f2fs_alloc_nid_failed(sbi, new_nid);
453 			goto in_page_out;
454 		}
455 		f2fs_alloc_nid_done(sbi, new_nid);
456 	}
457 	xattr_addr = page_address(xpage);
458 
459 	if (inline_size)
460 		memcpy(inline_addr, txattr_addr, inline_size);
461 	memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE);
462 
463 	if (inline_size)
464 		set_page_dirty(ipage ? ipage : in_page);
465 	set_page_dirty(xpage);
466 
467 	f2fs_put_page(xpage, 1);
468 in_page_out:
469 	f2fs_put_page(in_page, 1);
470 	return err;
471 }
472 
473 int f2fs_getxattr(struct inode *inode, int index, const char *name,
474 		void *buffer, size_t buffer_size, struct page *ipage)
475 {
476 	struct f2fs_xattr_entry *entry = NULL;
477 	int error = 0;
478 	unsigned int size, len;
479 	void *base_addr = NULL;
480 
481 	if (name == NULL)
482 		return -EINVAL;
483 
484 	len = strlen(name);
485 	if (len > F2FS_NAME_LEN)
486 		return -ERANGE;
487 
488 	down_read(&F2FS_I(inode)->i_xattr_sem);
489 	error = lookup_all_xattrs(inode, ipage, index, len, name,
490 				&entry, &base_addr);
491 	up_read(&F2FS_I(inode)->i_xattr_sem);
492 	if (error)
493 		return error;
494 
495 	size = le16_to_cpu(entry->e_value_size);
496 
497 	if (buffer && size > buffer_size) {
498 		error = -ERANGE;
499 		goto out;
500 	}
501 
502 	if (buffer) {
503 		char *pval = entry->e_name + entry->e_name_len;
504 		memcpy(buffer, pval, size);
505 	}
506 	error = size;
507 out:
508 	kzfree(base_addr);
509 	return error;
510 }
511 
512 ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
513 {
514 	struct inode *inode = d_inode(dentry);
515 	struct f2fs_xattr_entry *entry;
516 	void *base_addr;
517 	int error = 0;
518 	size_t rest = buffer_size;
519 
520 	down_read(&F2FS_I(inode)->i_xattr_sem);
521 	error = read_all_xattrs(inode, NULL, &base_addr);
522 	up_read(&F2FS_I(inode)->i_xattr_sem);
523 	if (error)
524 		return error;
525 
526 	list_for_each_xattr(entry, base_addr) {
527 		const struct xattr_handler *handler =
528 			f2fs_xattr_handler(entry->e_name_index);
529 		const char *prefix;
530 		size_t prefix_len;
531 		size_t size;
532 
533 		if (!handler || (handler->list && !handler->list(dentry)))
534 			continue;
535 
536 		prefix = handler->prefix ?: handler->name;
537 		prefix_len = strlen(prefix);
538 		size = prefix_len + entry->e_name_len + 1;
539 		if (buffer) {
540 			if (size > rest) {
541 				error = -ERANGE;
542 				goto cleanup;
543 			}
544 			memcpy(buffer, prefix, prefix_len);
545 			buffer += prefix_len;
546 			memcpy(buffer, entry->e_name, entry->e_name_len);
547 			buffer += entry->e_name_len;
548 			*buffer++ = 0;
549 		}
550 		rest -= size;
551 	}
552 	error = buffer_size - rest;
553 cleanup:
554 	kzfree(base_addr);
555 	return error;
556 }
557 
558 static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry,
559 					const void *value, size_t size)
560 {
561 	void *pval = entry->e_name + entry->e_name_len;
562 
563 	return (le16_to_cpu(entry->e_value_size) == size) &&
564 					!memcmp(pval, value, size);
565 }
566 
567 static int __f2fs_setxattr(struct inode *inode, int index,
568 			const char *name, const void *value, size_t size,
569 			struct page *ipage, int flags)
570 {
571 	struct f2fs_xattr_entry *here, *last;
572 	void *base_addr;
573 	int found, newsize;
574 	size_t len;
575 	__u32 new_hsize;
576 	int error = 0;
577 
578 	if (name == NULL)
579 		return -EINVAL;
580 
581 	if (value == NULL)
582 		size = 0;
583 
584 	len = strlen(name);
585 
586 	if (len > F2FS_NAME_LEN)
587 		return -ERANGE;
588 
589 	if (size > MAX_VALUE_LEN(inode))
590 		return -E2BIG;
591 
592 	error = read_all_xattrs(inode, ipage, &base_addr);
593 	if (error)
594 		return error;
595 
596 	/* find entry with wanted name. */
597 	here = __find_xattr(base_addr, index, len, name);
598 
599 	found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1;
600 
601 	if (found) {
602 		if ((flags & XATTR_CREATE)) {
603 			error = -EEXIST;
604 			goto exit;
605 		}
606 
607 		if (value && f2fs_xattr_value_same(here, value, size))
608 			goto exit;
609 	} else if ((flags & XATTR_REPLACE)) {
610 		error = -ENODATA;
611 		goto exit;
612 	}
613 
614 	last = here;
615 	while (!IS_XATTR_LAST_ENTRY(last))
616 		last = XATTR_NEXT_ENTRY(last);
617 
618 	newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size);
619 
620 	/* 1. Check space */
621 	if (value) {
622 		int free;
623 		/*
624 		 * If value is NULL, it is remove operation.
625 		 * In case of update operation, we calculate free.
626 		 */
627 		free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr);
628 		if (found)
629 			free = free + ENTRY_SIZE(here);
630 
631 		if (unlikely(free < newsize)) {
632 			error = -E2BIG;
633 			goto exit;
634 		}
635 	}
636 
637 	/* 2. Remove old entry */
638 	if (found) {
639 		/*
640 		 * If entry is found, remove old entry.
641 		 * If not found, remove operation is not needed.
642 		 */
643 		struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
644 		int oldsize = ENTRY_SIZE(here);
645 
646 		memmove(here, next, (char *)last - (char *)next);
647 		last = (struct f2fs_xattr_entry *)((char *)last - oldsize);
648 		memset(last, 0, oldsize);
649 	}
650 
651 	new_hsize = (char *)last - (char *)base_addr;
652 
653 	/* 3. Write new entry */
654 	if (value) {
655 		char *pval;
656 		/*
657 		 * Before we come here, old entry is removed.
658 		 * We just write new entry.
659 		 */
660 		last->e_name_index = index;
661 		last->e_name_len = len;
662 		memcpy(last->e_name, name, len);
663 		pval = last->e_name + len;
664 		memcpy(pval, value, size);
665 		last->e_value_size = cpu_to_le16(size);
666 		new_hsize += newsize;
667 	}
668 
669 	error = write_all_xattrs(inode, new_hsize, base_addr, ipage);
670 	if (error)
671 		goto exit;
672 
673 	if (is_inode_flag_set(inode, FI_ACL_MODE)) {
674 		inode->i_mode = F2FS_I(inode)->i_acl_mode;
675 		inode->i_ctime = current_time(inode);
676 		clear_inode_flag(inode, FI_ACL_MODE);
677 	}
678 	if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
679 			!strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
680 		f2fs_set_encrypted_inode(inode);
681 	f2fs_mark_inode_dirty_sync(inode, true);
682 	if (!error && S_ISDIR(inode->i_mode))
683 		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
684 exit:
685 	kzfree(base_addr);
686 	return error;
687 }
688 
689 int f2fs_setxattr(struct inode *inode, int index, const char *name,
690 				const void *value, size_t size,
691 				struct page *ipage, int flags)
692 {
693 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
694 	int err;
695 
696 	err = dquot_initialize(inode);
697 	if (err)
698 		return err;
699 
700 	/* this case is only from f2fs_init_inode_metadata */
701 	if (ipage)
702 		return __f2fs_setxattr(inode, index, name, value,
703 						size, ipage, flags);
704 	f2fs_balance_fs(sbi, true);
705 
706 	f2fs_lock_op(sbi);
707 	/* protect xattr_ver */
708 	down_write(&F2FS_I(inode)->i_sem);
709 	down_write(&F2FS_I(inode)->i_xattr_sem);
710 	err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags);
711 	up_write(&F2FS_I(inode)->i_xattr_sem);
712 	up_write(&F2FS_I(inode)->i_sem);
713 	f2fs_unlock_op(sbi);
714 
715 	f2fs_update_time(sbi, REQ_TIME);
716 	return err;
717 }
718