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18#include <linux/rwsem.h>
19#include <linux/f2fs_fs.h>
20#include <linux/security.h>
21#include <linux/posix_acl_xattr.h>
22#include "f2fs.h"
23#include "xattr.h"
24
25static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
26 struct dentry *unused, struct inode *inode,
27 const char *name, void *buffer, size_t size)
28{
29 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
30
31 switch (handler->flags) {
32 case F2FS_XATTR_INDEX_USER:
33 if (!test_opt(sbi, XATTR_USER))
34 return -EOPNOTSUPP;
35 break;
36 case F2FS_XATTR_INDEX_TRUSTED:
37 case F2FS_XATTR_INDEX_SECURITY:
38 break;
39 default:
40 return -EINVAL;
41 }
42 return f2fs_getxattr(inode, handler->flags, name,
43 buffer, size, NULL);
44}
45
46static int f2fs_xattr_generic_set(const struct xattr_handler *handler,
47 struct dentry *unused, struct inode *inode,
48 const char *name, const void *value,
49 size_t size, int flags)
50{
51 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
52
53 switch (handler->flags) {
54 case F2FS_XATTR_INDEX_USER:
55 if (!test_opt(sbi, XATTR_USER))
56 return -EOPNOTSUPP;
57 break;
58 case F2FS_XATTR_INDEX_TRUSTED:
59 case F2FS_XATTR_INDEX_SECURITY:
60 break;
61 default:
62 return -EINVAL;
63 }
64 return f2fs_setxattr(inode, handler->flags, name,
65 value, size, NULL, flags);
66}
67
68static bool f2fs_xattr_user_list(struct dentry *dentry)
69{
70 struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
71
72 return test_opt(sbi, XATTR_USER);
73}
74
75static bool f2fs_xattr_trusted_list(struct dentry *dentry)
76{
77 return capable(CAP_SYS_ADMIN);
78}
79
80static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
81 struct dentry *unused, struct inode *inode,
82 const char *name, void *buffer, size_t size)
83{
84 if (buffer)
85 *((char *)buffer) = F2FS_I(inode)->i_advise;
86 return sizeof(char);
87}
88
89static int f2fs_xattr_advise_set(const struct xattr_handler *handler,
90 struct dentry *unused, struct inode *inode,
91 const char *name, const void *value,
92 size_t size, int flags)
93{
94 unsigned char old_advise = F2FS_I(inode)->i_advise;
95 unsigned char new_advise;
96
97 if (!inode_owner_or_capable(inode))
98 return -EPERM;
99 if (value == NULL)
100 return -EINVAL;
101
102 new_advise = *(char *)value;
103 if (new_advise & ~FADVISE_MODIFIABLE_BITS)
104 return -EINVAL;
105
106 new_advise = new_advise & FADVISE_MODIFIABLE_BITS;
107 new_advise |= old_advise & ~FADVISE_MODIFIABLE_BITS;
108
109 F2FS_I(inode)->i_advise = new_advise;
110 f2fs_mark_inode_dirty_sync(inode, true);
111 return 0;
112}
113
114#ifdef CONFIG_F2FS_FS_SECURITY
115static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
116 void *page)
117{
118 const struct xattr *xattr;
119 int err = 0;
120
121 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
122 err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY,
123 xattr->name, xattr->value,
124 xattr->value_len, (struct page *)page, 0);
125 if (err < 0)
126 break;
127 }
128 return err;
129}
130
131int f2fs_init_security(struct inode *inode, struct inode *dir,
132 const struct qstr *qstr, struct page *ipage)
133{
134 return security_inode_init_security(inode, dir, qstr,
135 &f2fs_initxattrs, ipage);
136}
137#endif
138
139const struct xattr_handler f2fs_xattr_user_handler = {
140 .prefix = XATTR_USER_PREFIX,
141 .flags = F2FS_XATTR_INDEX_USER,
142 .list = f2fs_xattr_user_list,
143 .get = f2fs_xattr_generic_get,
144 .set = f2fs_xattr_generic_set,
145};
146
147const struct xattr_handler f2fs_xattr_trusted_handler = {
148 .prefix = XATTR_TRUSTED_PREFIX,
149 .flags = F2FS_XATTR_INDEX_TRUSTED,
150 .list = f2fs_xattr_trusted_list,
151 .get = f2fs_xattr_generic_get,
152 .set = f2fs_xattr_generic_set,
153};
154
155const struct xattr_handler f2fs_xattr_advise_handler = {
156 .name = F2FS_SYSTEM_ADVISE_NAME,
157 .flags = F2FS_XATTR_INDEX_ADVISE,
158 .get = f2fs_xattr_advise_get,
159 .set = f2fs_xattr_advise_set,
160};
161
162const struct xattr_handler f2fs_xattr_security_handler = {
163 .prefix = XATTR_SECURITY_PREFIX,
164 .flags = F2FS_XATTR_INDEX_SECURITY,
165 .get = f2fs_xattr_generic_get,
166 .set = f2fs_xattr_generic_set,
167};
168
169static const struct xattr_handler *f2fs_xattr_handler_map[] = {
170 [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
171#ifdef CONFIG_F2FS_FS_POSIX_ACL
172 [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
173 [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
174#endif
175 [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
176#ifdef CONFIG_F2FS_FS_SECURITY
177 [F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler,
178#endif
179 [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
180};
181
182const struct xattr_handler *f2fs_xattr_handlers[] = {
183 &f2fs_xattr_user_handler,
184#ifdef CONFIG_F2FS_FS_POSIX_ACL
185 &posix_acl_access_xattr_handler,
186 &posix_acl_default_xattr_handler,
187#endif
188 &f2fs_xattr_trusted_handler,
189#ifdef CONFIG_F2FS_FS_SECURITY
190 &f2fs_xattr_security_handler,
191#endif
192 &f2fs_xattr_advise_handler,
193 NULL,
194};
195
196static inline const struct xattr_handler *f2fs_xattr_handler(int index)
197{
198 const struct xattr_handler *handler = NULL;
199
200 if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
201 handler = f2fs_xattr_handler_map[index];
202 return handler;
203}
204
205static struct f2fs_xattr_entry *__find_xattr(void *base_addr,
206 void *last_base_addr, int index,
207 size_t len, const char *name)
208{
209 struct f2fs_xattr_entry *entry;
210
211 list_for_each_xattr(entry, base_addr) {
212 if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
213 (void *)XATTR_NEXT_ENTRY(entry) > last_base_addr)
214 return NULL;
215
216 if (entry->e_name_index != index)
217 continue;
218 if (entry->e_name_len != len)
219 continue;
220 if (!memcmp(entry->e_name, name, len))
221 break;
222 }
223 return entry;
224}
225
226static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode,
227 void *base_addr, void **last_addr, int index,
228 size_t len, const char *name)
229{
230 struct f2fs_xattr_entry *entry;
231 unsigned int inline_size = inline_xattr_size(inode);
232 void *max_addr = base_addr + inline_size;
233
234 list_for_each_xattr(entry, base_addr) {
235 if ((void *)entry + sizeof(__u32) > max_addr ||
236 (void *)XATTR_NEXT_ENTRY(entry) > max_addr) {
237 *last_addr = entry;
238 return NULL;
239 }
240 if (entry->e_name_index != index)
241 continue;
242 if (entry->e_name_len != len)
243 continue;
244 if (!memcmp(entry->e_name, name, len))
245 break;
246 }
247
248
249 if (IS_XATTR_LAST_ENTRY(entry) &&
250 (void *)entry + sizeof(__u32) > max_addr) {
251 *last_addr = entry;
252 return NULL;
253 }
254 return entry;
255}
256
257static int read_inline_xattr(struct inode *inode, struct page *ipage,
258 void *txattr_addr)
259{
260 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
261 unsigned int inline_size = inline_xattr_size(inode);
262 struct page *page = NULL;
263 void *inline_addr;
264
265 if (ipage) {
266 inline_addr = inline_xattr_addr(inode, ipage);
267 } else {
268 page = f2fs_get_node_page(sbi, inode->i_ino);
269 if (IS_ERR(page))
270 return PTR_ERR(page);
271
272 inline_addr = inline_xattr_addr(inode, page);
273 }
274 memcpy(txattr_addr, inline_addr, inline_size);
275 f2fs_put_page(page, 1);
276
277 return 0;
278}
279
280static int read_xattr_block(struct inode *inode, void *txattr_addr)
281{
282 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
283 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
284 unsigned int inline_size = inline_xattr_size(inode);
285 struct page *xpage;
286 void *xattr_addr;
287
288
289 xpage = f2fs_get_node_page(sbi, xnid);
290 if (IS_ERR(xpage))
291 return PTR_ERR(xpage);
292
293 xattr_addr = page_address(xpage);
294 memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE);
295 f2fs_put_page(xpage, 1);
296
297 return 0;
298}
299
300static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
301 unsigned int index, unsigned int len,
302 const char *name, struct f2fs_xattr_entry **xe,
303 void **base_addr, int *base_size)
304{
305 void *cur_addr, *txattr_addr, *last_txattr_addr;
306 void *last_addr = NULL;
307 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
308 unsigned int inline_size = inline_xattr_size(inode);
309 int err = 0;
310
311 if (!xnid && !inline_size)
312 return -ENODATA;
313
314 *base_size = XATTR_SIZE(xnid, inode) + XATTR_PADDING_SIZE;
315 txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode), *base_size, GFP_NOFS);
316 if (!txattr_addr)
317 return -ENOMEM;
318
319 last_txattr_addr = (void *)txattr_addr + XATTR_SIZE(xnid, inode);
320
321
322 if (inline_size) {
323 err = read_inline_xattr(inode, ipage, txattr_addr);
324 if (err)
325 goto out;
326
327 *xe = __find_inline_xattr(inode, txattr_addr, &last_addr,
328 index, len, name);
329 if (*xe) {
330 *base_size = inline_size;
331 goto check;
332 }
333 }
334
335
336 if (xnid) {
337 err = read_xattr_block(inode, txattr_addr);
338 if (err)
339 goto out;
340 }
341
342 if (last_addr)
343 cur_addr = XATTR_HDR(last_addr) - 1;
344 else
345 cur_addr = txattr_addr;
346
347 *xe = __find_xattr(cur_addr, last_txattr_addr, index, len, name);
348 if (!*xe) {
349 f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
350 inode->i_ino);
351 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
352 err = -EFSCORRUPTED;
353 goto out;
354 }
355check:
356 if (IS_XATTR_LAST_ENTRY(*xe)) {
357 err = -ENODATA;
358 goto out;
359 }
360
361 *base_addr = txattr_addr;
362 return 0;
363out:
364 kvfree(txattr_addr);
365 return err;
366}
367
368static int read_all_xattrs(struct inode *inode, struct page *ipage,
369 void **base_addr)
370{
371 struct f2fs_xattr_header *header;
372 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
373 unsigned int size = VALID_XATTR_BLOCK_SIZE;
374 unsigned int inline_size = inline_xattr_size(inode);
375 void *txattr_addr;
376 int err;
377
378 txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode),
379 inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS);
380 if (!txattr_addr)
381 return -ENOMEM;
382
383
384 if (inline_size) {
385 err = read_inline_xattr(inode, ipage, txattr_addr);
386 if (err)
387 goto fail;
388 }
389
390
391 if (xnid) {
392 err = read_xattr_block(inode, txattr_addr);
393 if (err)
394 goto fail;
395 }
396
397 header = XATTR_HDR(txattr_addr);
398
399
400 if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
401 header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
402 header->h_refcount = cpu_to_le32(1);
403 }
404 *base_addr = txattr_addr;
405 return 0;
406fail:
407 kvfree(txattr_addr);
408 return err;
409}
410
411static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
412 void *txattr_addr, struct page *ipage)
413{
414 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
415 size_t inline_size = inline_xattr_size(inode);
416 struct page *in_page = NULL;
417 void *xattr_addr;
418 void *inline_addr = NULL;
419 struct page *xpage;
420 nid_t new_nid = 0;
421 int err = 0;
422
423 if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
424 if (!f2fs_alloc_nid(sbi, &new_nid))
425 return -ENOSPC;
426
427
428 if (inline_size) {
429 if (ipage) {
430 inline_addr = inline_xattr_addr(inode, ipage);
431 } else {
432 in_page = f2fs_get_node_page(sbi, inode->i_ino);
433 if (IS_ERR(in_page)) {
434 f2fs_alloc_nid_failed(sbi, new_nid);
435 return PTR_ERR(in_page);
436 }
437 inline_addr = inline_xattr_addr(inode, in_page);
438 }
439
440 f2fs_wait_on_page_writeback(ipage ? ipage : in_page,
441 NODE, true, true);
442
443 if (hsize <= inline_size) {
444 err = f2fs_truncate_xattr_node(inode);
445 f2fs_alloc_nid_failed(sbi, new_nid);
446 if (err) {
447 f2fs_put_page(in_page, 1);
448 return err;
449 }
450 memcpy(inline_addr, txattr_addr, inline_size);
451 set_page_dirty(ipage ? ipage : in_page);
452 goto in_page_out;
453 }
454 }
455
456
457 if (F2FS_I(inode)->i_xattr_nid) {
458 xpage = f2fs_get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
459 if (IS_ERR(xpage)) {
460 err = PTR_ERR(xpage);
461 f2fs_alloc_nid_failed(sbi, new_nid);
462 goto in_page_out;
463 }
464 f2fs_bug_on(sbi, new_nid);
465 f2fs_wait_on_page_writeback(xpage, NODE, true, true);
466 } else {
467 struct dnode_of_data dn;
468 set_new_dnode(&dn, inode, NULL, NULL, new_nid);
469 xpage = f2fs_new_node_page(&dn, XATTR_NODE_OFFSET);
470 if (IS_ERR(xpage)) {
471 err = PTR_ERR(xpage);
472 f2fs_alloc_nid_failed(sbi, new_nid);
473 goto in_page_out;
474 }
475 f2fs_alloc_nid_done(sbi, new_nid);
476 }
477 xattr_addr = page_address(xpage);
478
479 if (inline_size)
480 memcpy(inline_addr, txattr_addr, inline_size);
481 memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE);
482
483 if (inline_size)
484 set_page_dirty(ipage ? ipage : in_page);
485 set_page_dirty(xpage);
486
487 f2fs_put_page(xpage, 1);
488in_page_out:
489 f2fs_put_page(in_page, 1);
490 return err;
491}
492
493int f2fs_getxattr(struct inode *inode, int index, const char *name,
494 void *buffer, size_t buffer_size, struct page *ipage)
495{
496 struct f2fs_xattr_entry *entry = NULL;
497 int error = 0;
498 unsigned int size, len;
499 void *base_addr = NULL;
500 int base_size;
501
502 if (name == NULL)
503 return -EINVAL;
504
505 len = strlen(name);
506 if (len > F2FS_NAME_LEN)
507 return -ERANGE;
508
509 down_read(&F2FS_I(inode)->i_xattr_sem);
510 error = lookup_all_xattrs(inode, ipage, index, len, name,
511 &entry, &base_addr, &base_size);
512 up_read(&F2FS_I(inode)->i_xattr_sem);
513 if (error)
514 return error;
515
516 size = le16_to_cpu(entry->e_value_size);
517
518 if (buffer && size > buffer_size) {
519 error = -ERANGE;
520 goto out;
521 }
522
523 if (buffer) {
524 char *pval = entry->e_name + entry->e_name_len;
525
526 if (base_size - (pval - (char *)base_addr) < size) {
527 error = -ERANGE;
528 goto out;
529 }
530 memcpy(buffer, pval, size);
531 }
532 error = size;
533out:
534 kvfree(base_addr);
535 return error;
536}
537
538ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
539{
540 struct inode *inode = d_inode(dentry);
541 struct f2fs_xattr_entry *entry;
542 void *base_addr;
543 int error = 0;
544 size_t rest = buffer_size;
545
546 down_read(&F2FS_I(inode)->i_xattr_sem);
547 error = read_all_xattrs(inode, NULL, &base_addr);
548 up_read(&F2FS_I(inode)->i_xattr_sem);
549 if (error)
550 return error;
551
552 list_for_each_xattr(entry, base_addr) {
553 const struct xattr_handler *handler =
554 f2fs_xattr_handler(entry->e_name_index);
555 const char *prefix;
556 size_t prefix_len;
557 size_t size;
558
559 if (!handler || (handler->list && !handler->list(dentry)))
560 continue;
561
562 prefix = xattr_prefix(handler);
563 prefix_len = strlen(prefix);
564 size = prefix_len + entry->e_name_len + 1;
565 if (buffer) {
566 if (size > rest) {
567 error = -ERANGE;
568 goto cleanup;
569 }
570 memcpy(buffer, prefix, prefix_len);
571 buffer += prefix_len;
572 memcpy(buffer, entry->e_name, entry->e_name_len);
573 buffer += entry->e_name_len;
574 *buffer++ = 0;
575 }
576 rest -= size;
577 }
578 error = buffer_size - rest;
579cleanup:
580 kvfree(base_addr);
581 return error;
582}
583
584static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry,
585 const void *value, size_t size)
586{
587 void *pval = entry->e_name + entry->e_name_len;
588
589 return (le16_to_cpu(entry->e_value_size) == size) &&
590 !memcmp(pval, value, size);
591}
592
593static int __f2fs_setxattr(struct inode *inode, int index,
594 const char *name, const void *value, size_t size,
595 struct page *ipage, int flags)
596{
597 struct f2fs_xattr_entry *here, *last;
598 void *base_addr, *last_base_addr;
599 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
600 int found, newsize;
601 size_t len;
602 __u32 new_hsize;
603 int error = 0;
604
605 if (name == NULL)
606 return -EINVAL;
607
608 if (value == NULL)
609 size = 0;
610
611 len = strlen(name);
612
613 if (len > F2FS_NAME_LEN)
614 return -ERANGE;
615
616 if (size > MAX_VALUE_LEN(inode))
617 return -E2BIG;
618
619 error = read_all_xattrs(inode, ipage, &base_addr);
620 if (error)
621 return error;
622
623 last_base_addr = (void *)base_addr + XATTR_SIZE(xnid, inode);
624
625
626 here = __find_xattr(base_addr, last_base_addr, index, len, name);
627 if (!here) {
628 f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
629 inode->i_ino);
630 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
631 error = -EFSCORRUPTED;
632 goto exit;
633 }
634
635 found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1;
636
637 if (found) {
638 if ((flags & XATTR_CREATE)) {
639 error = -EEXIST;
640 goto exit;
641 }
642
643 if (value && f2fs_xattr_value_same(here, value, size))
644 goto exit;
645 } else if ((flags & XATTR_REPLACE)) {
646 error = -ENODATA;
647 goto exit;
648 }
649
650 last = here;
651 while (!IS_XATTR_LAST_ENTRY(last))
652 last = XATTR_NEXT_ENTRY(last);
653
654 newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size);
655
656
657 if (value) {
658 int free;
659
660
661
662
663 free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr);
664 if (found)
665 free = free + ENTRY_SIZE(here);
666
667 if (unlikely(free < newsize)) {
668 error = -E2BIG;
669 goto exit;
670 }
671 }
672
673
674 if (found) {
675
676
677
678
679 struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
680 int oldsize = ENTRY_SIZE(here);
681
682 memmove(here, next, (char *)last - (char *)next);
683 last = (struct f2fs_xattr_entry *)((char *)last - oldsize);
684 memset(last, 0, oldsize);
685 }
686
687 new_hsize = (char *)last - (char *)base_addr;
688
689
690 if (value) {
691 char *pval;
692
693
694
695
696 last->e_name_index = index;
697 last->e_name_len = len;
698 memcpy(last->e_name, name, len);
699 pval = last->e_name + len;
700 memcpy(pval, value, size);
701 last->e_value_size = cpu_to_le16(size);
702 new_hsize += newsize;
703 }
704
705 error = write_all_xattrs(inode, new_hsize, base_addr, ipage);
706 if (error)
707 goto exit;
708
709 if (is_inode_flag_set(inode, FI_ACL_MODE)) {
710 inode->i_mode = F2FS_I(inode)->i_acl_mode;
711 inode->i_ctime = current_time(inode);
712 clear_inode_flag(inode, FI_ACL_MODE);
713 }
714 if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
715 !strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
716 f2fs_set_encrypted_inode(inode);
717 f2fs_mark_inode_dirty_sync(inode, true);
718 if (!error && S_ISDIR(inode->i_mode))
719 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
720exit:
721 kvfree(base_addr);
722 return error;
723}
724
725int f2fs_setxattr(struct inode *inode, int index, const char *name,
726 const void *value, size_t size,
727 struct page *ipage, int flags)
728{
729 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
730 int err;
731
732 err = dquot_initialize(inode);
733 if (err)
734 return err;
735
736
737 if (ipage)
738 return __f2fs_setxattr(inode, index, name, value,
739 size, ipage, flags);
740 f2fs_balance_fs(sbi, true);
741
742 f2fs_lock_op(sbi);
743
744 down_write(&F2FS_I(inode)->i_sem);
745 down_write(&F2FS_I(inode)->i_xattr_sem);
746 err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags);
747 up_write(&F2FS_I(inode)->i_xattr_sem);
748 up_write(&F2FS_I(inode)->i_sem);
749 f2fs_unlock_op(sbi);
750
751 f2fs_update_time(sbi, REQ_TIME);
752 return err;
753}
754
