blob: fb12f2fcc65a91c59fadc4b3b70f832d973b992a [file] [log] [blame]
Linus Torvalds8005ecc2012-12-20 13:54:51 -08001/*
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 "f2fs.h"
25#include "xattr.h"
26
27static size_t f2fs_xattr_generic_list(struct dentry *dentry, char *list,
Jaegeuk Kimb5614a32014-04-23 12:17:25 +090028 size_t list_size, const char *name, size_t len, int type)
Linus Torvalds8005ecc2012-12-20 13:54:51 -080029{
30 struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
31 int total_len, prefix_len = 0;
32 const char *prefix = NULL;
33
34 switch (type) {
35 case F2FS_XATTR_INDEX_USER:
36 if (!test_opt(sbi, XATTR_USER))
37 return -EOPNOTSUPP;
38 prefix = XATTR_USER_PREFIX;
39 prefix_len = XATTR_USER_PREFIX_LEN;
40 break;
41 case F2FS_XATTR_INDEX_TRUSTED:
42 if (!capable(CAP_SYS_ADMIN))
43 return -EPERM;
44 prefix = XATTR_TRUSTED_PREFIX;
45 prefix_len = XATTR_TRUSTED_PREFIX_LEN;
46 break;
47 case F2FS_XATTR_INDEX_SECURITY:
48 prefix = XATTR_SECURITY_PREFIX;
49 prefix_len = XATTR_SECURITY_PREFIX_LEN;
50 break;
51 default:
52 return -EINVAL;
53 }
54
Jaegeuk Kimb5614a32014-04-23 12:17:25 +090055 total_len = prefix_len + len + 1;
Linus Torvalds8005ecc2012-12-20 13:54:51 -080056 if (list && total_len <= list_size) {
57 memcpy(list, prefix, prefix_len);
Jaegeuk Kimb5614a32014-04-23 12:17:25 +090058 memcpy(list + prefix_len, name, len);
59 list[prefix_len + len] = '\0';
Linus Torvalds8005ecc2012-12-20 13:54:51 -080060 }
61 return total_len;
62}
63
64static int f2fs_xattr_generic_get(struct dentry *dentry, const char *name,
65 void *buffer, size_t size, int type)
66{
67 struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
68
69 switch (type) {
70 case F2FS_XATTR_INDEX_USER:
71 if (!test_opt(sbi, XATTR_USER))
72 return -EOPNOTSUPP;
73 break;
74 case F2FS_XATTR_INDEX_TRUSTED:
75 if (!capable(CAP_SYS_ADMIN))
76 return -EPERM;
77 break;
78 case F2FS_XATTR_INDEX_SECURITY:
79 break;
80 default:
81 return -EINVAL;
82 }
83 if (strcmp(name, "") == 0)
84 return -EINVAL;
85 return f2fs_getxattr(dentry->d_inode, type, name, buffer, size);
86}
87
88static int f2fs_xattr_generic_set(struct dentry *dentry, const char *name,
89 const void *value, size_t size, int flags, int type)
90{
91 struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
92
93 switch (type) {
94 case F2FS_XATTR_INDEX_USER:
95 if (!test_opt(sbi, XATTR_USER))
96 return -EOPNOTSUPP;
97 break;
98 case F2FS_XATTR_INDEX_TRUSTED:
99 if (!capable(CAP_SYS_ADMIN))
100 return -EPERM;
101 break;
102 case F2FS_XATTR_INDEX_SECURITY:
103 break;
104 default:
105 return -EINVAL;
106 }
107 if (strcmp(name, "") == 0)
108 return -EINVAL;
109
110 return f2fs_setxattr(dentry->d_inode, type, name, value, size, NULL);
111}
112
113static size_t f2fs_xattr_advise_list(struct dentry *dentry, char *list,
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900114 size_t list_size, const char *name, size_t len, int type)
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800115{
116 const char *xname = F2FS_SYSTEM_ADVISE_PREFIX;
117 size_t size;
118
119 if (type != F2FS_XATTR_INDEX_ADVISE)
120 return 0;
121
122 size = strlen(xname) + 1;
123 if (list && size <= list_size)
124 memcpy(list, xname, size);
125 return size;
126}
127
128static int f2fs_xattr_advise_get(struct dentry *dentry, const char *name,
129 void *buffer, size_t size, int type)
130{
131 struct inode *inode = dentry->d_inode;
132
133 if (strcmp(name, "") != 0)
134 return -EINVAL;
135
136 *((char *)buffer) = F2FS_I(inode)->i_advise;
137 return sizeof(char);
138}
139
140static int f2fs_xattr_advise_set(struct dentry *dentry, const char *name,
141 const void *value, size_t size, int flags, int type)
142{
143 struct inode *inode = dentry->d_inode;
144
145 if (strcmp(name, "") != 0)
146 return -EINVAL;
147 if (!inode_owner_or_capable(inode))
148 return -EPERM;
149 if (value == NULL)
150 return -EINVAL;
151
152 F2FS_I(inode)->i_advise |= *(char *)value;
153 return 0;
154}
155
156#ifdef CONFIG_F2FS_FS_SECURITY
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900157static int __f2fs_setxattr(struct inode *inode, int index,
158 const char *name, const void *value, size_t size,
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800159 struct page *ipage);
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900160
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800161static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
162 void *page)
163{
164 const struct xattr *xattr;
165 int err = 0;
166
167 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
168 err = __f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY,
169 xattr->name, xattr->value,
170 xattr->value_len, (struct page *)page);
171 if (err < 0)
172 break;
173 }
174 return err;
175}
176
177int f2fs_init_security(struct inode *inode, struct inode *dir,
178 const struct qstr *qstr, struct page *ipage)
179{
180 return security_inode_init_security(inode, dir, qstr,
181 &f2fs_initxattrs, ipage);
182}
183#endif
184
185const struct xattr_handler f2fs_xattr_user_handler = {
186 .prefix = XATTR_USER_PREFIX,
187 .flags = F2FS_XATTR_INDEX_USER,
188 .list = f2fs_xattr_generic_list,
189 .get = f2fs_xattr_generic_get,
190 .set = f2fs_xattr_generic_set,
191};
192
193const struct xattr_handler f2fs_xattr_trusted_handler = {
194 .prefix = XATTR_TRUSTED_PREFIX,
195 .flags = F2FS_XATTR_INDEX_TRUSTED,
196 .list = f2fs_xattr_generic_list,
197 .get = f2fs_xattr_generic_get,
198 .set = f2fs_xattr_generic_set,
199};
200
201const struct xattr_handler f2fs_xattr_advise_handler = {
202 .prefix = F2FS_SYSTEM_ADVISE_PREFIX,
203 .flags = F2FS_XATTR_INDEX_ADVISE,
204 .list = f2fs_xattr_advise_list,
205 .get = f2fs_xattr_advise_get,
206 .set = f2fs_xattr_advise_set,
207};
208
209const struct xattr_handler f2fs_xattr_security_handler = {
210 .prefix = XATTR_SECURITY_PREFIX,
211 .flags = F2FS_XATTR_INDEX_SECURITY,
212 .list = f2fs_xattr_generic_list,
213 .get = f2fs_xattr_generic_get,
214 .set = f2fs_xattr_generic_set,
215};
216
217static const struct xattr_handler *f2fs_xattr_handler_map[] = {
218 [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
219#ifdef CONFIG_F2FS_FS_POSIX_ACL
220 [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &f2fs_xattr_acl_access_handler,
221 [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &f2fs_xattr_acl_default_handler,
222#endif
223 [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
224#ifdef CONFIG_F2FS_FS_SECURITY
225 [F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler,
226#endif
227 [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
228};
229
230const struct xattr_handler *f2fs_xattr_handlers[] = {
231 &f2fs_xattr_user_handler,
232#ifdef CONFIG_F2FS_FS_POSIX_ACL
233 &f2fs_xattr_acl_access_handler,
234 &f2fs_xattr_acl_default_handler,
235#endif
236 &f2fs_xattr_trusted_handler,
237#ifdef CONFIG_F2FS_FS_SECURITY
238 &f2fs_xattr_security_handler,
239#endif
240 &f2fs_xattr_advise_handler,
241 NULL,
242};
243
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900244static inline const struct xattr_handler *f2fs_xattr_handler(int index)
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800245{
246 const struct xattr_handler *handler = NULL;
247
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900248 if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
249 handler = f2fs_xattr_handler_map[index];
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800250 return handler;
251}
252
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900253static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int index,
254 size_t len, const char *name)
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800255{
256 struct f2fs_xattr_entry *entry;
257
258 list_for_each_xattr(entry, base_addr) {
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900259 if (entry->e_name_index != index)
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800260 continue;
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900261 if (entry->e_name_len != len)
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800262 continue;
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900263 if (!memcmp(entry->e_name, name, len))
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800264 break;
265 }
266 return entry;
267}
268
269static void *read_all_xattrs(struct inode *inode, struct page *ipage)
270{
271 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
272 struct f2fs_xattr_header *header;
273 size_t size = PAGE_SIZE, inline_size = 0;
274 void *txattr_addr;
275
276 inline_size = inline_xattr_size(inode);
277
Jaegeuk Kim395204b2014-03-20 22:21:08 +0900278 txattr_addr = kzalloc(inline_size + size, GFP_F2FS_ZERO);
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800279 if (!txattr_addr)
280 return NULL;
281
282 /* read from inline xattr */
283 if (inline_size) {
284 struct page *page = NULL;
285 void *inline_addr;
286
287 if (ipage) {
288 inline_addr = inline_xattr_addr(ipage);
289 } else {
290 page = get_node_page(sbi, inode->i_ino);
291 if (IS_ERR(page))
292 goto fail;
293 inline_addr = inline_xattr_addr(page);
294 }
295 memcpy(txattr_addr, inline_addr, inline_size);
296 f2fs_put_page(page, 1);
297 }
298
299 /* read from xattr node block */
300 if (F2FS_I(inode)->i_xattr_nid) {
301 struct page *xpage;
302 void *xattr_addr;
303
304 /* The inode already has an extended attribute block. */
305 xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
306 if (IS_ERR(xpage))
307 goto fail;
308
309 xattr_addr = page_address(xpage);
310 memcpy(txattr_addr + inline_size, xattr_addr, PAGE_SIZE);
311 f2fs_put_page(xpage, 1);
312 }
313
314 header = XATTR_HDR(txattr_addr);
315
316 /* never been allocated xattrs */
317 if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
318 header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
319 header->h_refcount = cpu_to_le32(1);
320 }
321 return txattr_addr;
322fail:
323 kzfree(txattr_addr);
324 return NULL;
325}
326
327static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
328 void *txattr_addr, struct page *ipage)
329{
330 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
331 size_t inline_size = 0;
332 void *xattr_addr;
333 struct page *xpage;
334 nid_t new_nid = 0;
335 int err;
336
337 inline_size = inline_xattr_size(inode);
338
339 if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
340 if (!alloc_nid(sbi, &new_nid))
341 return -ENOSPC;
342
343 /* write to inline xattr */
344 if (inline_size) {
345 struct page *page = NULL;
346 void *inline_addr;
347
348 if (ipage) {
349 inline_addr = inline_xattr_addr(ipage);
350 } else {
351 page = get_node_page(sbi, inode->i_ino);
352 if (IS_ERR(page)) {
353 alloc_nid_failed(sbi, new_nid);
354 return PTR_ERR(page);
355 }
356 inline_addr = inline_xattr_addr(page);
357 }
358 memcpy(inline_addr, txattr_addr, inline_size);
359 f2fs_put_page(page, 1);
360
361 /* no need to use xattr node block */
362 if (hsize <= inline_size) {
363 err = truncate_xattr_node(inode, ipage);
364 alloc_nid_failed(sbi, new_nid);
365 return err;
366 }
367 }
368
369 /* write to xattr node block */
370 if (F2FS_I(inode)->i_xattr_nid) {
371 xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
372 if (IS_ERR(xpage)) {
373 alloc_nid_failed(sbi, new_nid);
374 return PTR_ERR(xpage);
375 }
376 f2fs_bug_on(new_nid);
377 } else {
378 struct dnode_of_data dn;
379 set_new_dnode(&dn, inode, NULL, NULL, new_nid);
380 xpage = new_node_page(&dn, XATTR_NODE_OFFSET, ipage);
381 if (IS_ERR(xpage)) {
382 alloc_nid_failed(sbi, new_nid);
383 return PTR_ERR(xpage);
384 }
385 alloc_nid_done(sbi, new_nid);
386 }
387
388 xattr_addr = page_address(xpage);
389 memcpy(xattr_addr, txattr_addr + inline_size, PAGE_SIZE -
390 sizeof(struct node_footer));
391 set_page_dirty(xpage);
392 f2fs_put_page(xpage, 1);
393
394 /* need to checkpoint during fsync */
395 F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi));
396 return 0;
397}
398
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900399int f2fs_getxattr(struct inode *inode, int index, const char *name,
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800400 void *buffer, size_t buffer_size)
401{
402 struct f2fs_xattr_entry *entry;
403 void *base_addr;
404 int error = 0;
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900405 size_t size, len;
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800406
407 if (name == NULL)
408 return -EINVAL;
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900409
410 len = strlen(name);
411 if (len > F2FS_NAME_LEN)
Chao Yu26a9bf52014-03-22 14:59:45 +0800412 return -ERANGE;
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800413
414 base_addr = read_all_xattrs(inode, NULL);
415 if (!base_addr)
416 return -ENOMEM;
417
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900418 entry = __find_xattr(base_addr, index, len, name);
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800419 if (IS_XATTR_LAST_ENTRY(entry)) {
420 error = -ENODATA;
421 goto cleanup;
422 }
423
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900424 size = le16_to_cpu(entry->e_value_size);
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800425
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900426 if (buffer && size > buffer_size) {
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800427 error = -ERANGE;
428 goto cleanup;
429 }
430
431 if (buffer) {
432 char *pval = entry->e_name + entry->e_name_len;
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900433 memcpy(buffer, pval, size);
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800434 }
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900435 error = size;
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800436
437cleanup:
438 kzfree(base_addr);
439 return error;
440}
441
442ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
443{
444 struct inode *inode = dentry->d_inode;
445 struct f2fs_xattr_entry *entry;
446 void *base_addr;
447 int error = 0;
448 size_t rest = buffer_size;
449
450 base_addr = read_all_xattrs(inode, NULL);
451 if (!base_addr)
452 return -ENOMEM;
453
454 list_for_each_xattr(entry, base_addr) {
455 const struct xattr_handler *handler =
456 f2fs_xattr_handler(entry->e_name_index);
457 size_t size;
458
459 if (!handler)
460 continue;
461
462 size = handler->list(dentry, buffer, rest, entry->e_name,
463 entry->e_name_len, handler->flags);
464 if (buffer && size > rest) {
465 error = -ERANGE;
466 goto cleanup;
467 }
468
469 if (buffer)
470 buffer += size;
471 rest -= size;
472 }
473 error = buffer_size - rest;
474cleanup:
475 kzfree(base_addr);
476 return error;
477}
478
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900479static int __f2fs_setxattr(struct inode *inode, int index,
480 const char *name, const void *value, size_t size,
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800481 struct page *ipage)
482{
483 struct f2fs_inode_info *fi = F2FS_I(inode);
484 struct f2fs_xattr_entry *here, *last;
485 void *base_addr;
486 int found, newsize;
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900487 size_t len;
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800488 __u32 new_hsize;
489 int error = -ENOMEM;
490
491 if (name == NULL)
492 return -EINVAL;
493
494 if (value == NULL)
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900495 size = 0;
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800496
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900497 len = strlen(name);
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800498
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900499 if (len > F2FS_NAME_LEN || size > MAX_VALUE_LEN(inode))
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800500 return -ERANGE;
501
502 base_addr = read_all_xattrs(inode, ipage);
503 if (!base_addr)
504 goto exit;
505
506 /* find entry with wanted name. */
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900507 here = __find_xattr(base_addr, index, len, name);
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800508
509 found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1;
510 last = here;
511
512 while (!IS_XATTR_LAST_ENTRY(last))
513 last = XATTR_NEXT_ENTRY(last);
514
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900515 newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size);
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800516
517 /* 1. Check space */
518 if (value) {
519 int free;
520 /*
521 * If value is NULL, it is remove operation.
522 * In case of update operation, we caculate free.
523 */
524 free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr);
525 if (found)
526 free = free + ENTRY_SIZE(here);
527
Changman Leeb1a94e82013-11-15 10:42:51 +0900528 if (unlikely(free < newsize)) {
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800529 error = -ENOSPC;
530 goto exit;
531 }
532 }
533
534 /* 2. Remove old entry */
535 if (found) {
536 /*
537 * If entry is found, remove old entry.
538 * If not found, remove operation is not needed.
539 */
540 struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
541 int oldsize = ENTRY_SIZE(here);
542
543 memmove(here, next, (char *)last - (char *)next);
544 last = (struct f2fs_xattr_entry *)((char *)last - oldsize);
545 memset(last, 0, oldsize);
546 }
547
548 new_hsize = (char *)last - (char *)base_addr;
549
550 /* 3. Write new entry */
551 if (value) {
552 char *pval;
553 /*
554 * Before we come here, old entry is removed.
555 * We just write new entry.
556 */
557 memset(last, 0, newsize);
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900558 last->e_name_index = index;
559 last->e_name_len = len;
560 memcpy(last->e_name, name, len);
561 pval = last->e_name + len;
562 memcpy(pval, value, size);
563 last->e_value_size = cpu_to_le16(size);
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800564 new_hsize += newsize;
565 }
566
567 error = write_all_xattrs(inode, new_hsize, base_addr, ipage);
568 if (error)
569 goto exit;
570
571 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
572 inode->i_mode = fi->i_acl_mode;
573 inode->i_ctime = CURRENT_TIME;
574 clear_inode_flag(fi, FI_ACL_MODE);
575 }
576
577 if (ipage)
578 update_inode(inode, ipage);
579 else
580 update_inode_page(inode);
581exit:
582 kzfree(base_addr);
583 return error;
584}
585
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900586int f2fs_setxattr(struct inode *inode, int index, const char *name,
587 const void *value, size_t size,
588 struct page *ipage)
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800589{
590 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
591 int err;
592
593 f2fs_balance_fs(sbi);
594
595 f2fs_lock_op(sbi);
Jaegeuk Kimee722542014-03-20 19:10:08 +0900596 /* protect xattr_ver */
597 down_write(&F2FS_I(inode)->i_sem);
Jaegeuk Kimb5614a32014-04-23 12:17:25 +0900598 err = __f2fs_setxattr(inode, index, name, value, size, ipage);
Jaegeuk Kimee722542014-03-20 19:10:08 +0900599 up_write(&F2FS_I(inode)->i_sem);
Linus Torvalds8005ecc2012-12-20 13:54:51 -0800600 f2fs_unlock_op(sbi);
601
602 return err;
603}