1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * fs/f2fs/xattr.c 4 * 5 * Copyright (c) 2012 Samsung Electronics Co., Ltd. 6 * http://www.samsung.com/ 7 * 8 * Portions of this code from linux/fs/ext2/xattr.c 9 * 10 * Copyright (C) 2001-2003 Andreas Gruenbacher <agruen@suse.de> 11 * 12 * Fix by Harrison Xing <harrison@mountainviewdata.com>. 13 * Extended attributes for symlinks and special files added per 14 * suggestion of Luka Renko <luka.renko@hermes.si>. 15 * xattr consolidation Copyright (c) 2004 James Morris <jmorris@redhat.com>, 16 * Red Hat Inc. 17 */ 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 25 static 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 46 static 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 68 static 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 75 static bool f2fs_xattr_trusted_list(struct dentry *dentry) 76 { 77 return capable(CAP_SYS_ADMIN); 78 } 79 80 static 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 89 static 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 115 static 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 } 130 131 int 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 138 139 const 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 }; 146 147 const 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 }; 154 155 const 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 }; 161 162 const 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 }; 168 169 static 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 }; 181 182 const 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 }; 195 196 static 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 } 204 205 static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int index, 206 size_t len, const char *name) 207 { 208 struct f2fs_xattr_entry *entry; 209 210 list_for_each_xattr(entry, base_addr) { 211 if (entry->e_name_index != index) 212 continue; 213 if (entry->e_name_len != len) 214 continue; 215 if (!memcmp(entry->e_name, name, len)) 216 break; 217 } 218 return entry; 219 } 220 221 static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode, 222 void *base_addr, void **last_addr, int index, 223 size_t len, const char *name) 224 { 225 struct f2fs_xattr_entry *entry; 226 unsigned int inline_size = inline_xattr_size(inode); 227 228 list_for_each_xattr(entry, base_addr) { 229 if ((void *)entry + sizeof(__u32) > base_addr + inline_size || 230 (void *)XATTR_NEXT_ENTRY(entry) + sizeof(__u32) > 231 base_addr + inline_size) { 232 *last_addr = entry; 233 return NULL; 234 } 235 if (entry->e_name_index != index) 236 continue; 237 if (entry->e_name_len != len) 238 continue; 239 if (!memcmp(entry->e_name, name, len)) 240 break; 241 } 242 return entry; 243 } 244 245 static int read_inline_xattr(struct inode *inode, struct page *ipage, 246 void *txattr_addr) 247 { 248 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 249 unsigned int inline_size = inline_xattr_size(inode); 250 struct page *page = NULL; 251 void *inline_addr; 252 253 if (ipage) { 254 inline_addr = inline_xattr_addr(inode, ipage); 255 } else { 256 page = f2fs_get_node_page(sbi, inode->i_ino); 257 if (IS_ERR(page)) 258 return PTR_ERR(page); 259 260 inline_addr = inline_xattr_addr(inode, page); 261 } 262 memcpy(txattr_addr, inline_addr, inline_size); 263 f2fs_put_page(page, 1); 264 265 return 0; 266 } 267 268 static int read_xattr_block(struct inode *inode, void *txattr_addr) 269 { 270 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 271 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 272 unsigned int inline_size = inline_xattr_size(inode); 273 struct page *xpage; 274 void *xattr_addr; 275 276 /* The inode already has an extended attribute block. */ 277 xpage = f2fs_get_node_page(sbi, xnid); 278 if (IS_ERR(xpage)) 279 return PTR_ERR(xpage); 280 281 xattr_addr = page_address(xpage); 282 memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE); 283 f2fs_put_page(xpage, 1); 284 285 return 0; 286 } 287 288 static int lookup_all_xattrs(struct inode *inode, struct page *ipage, 289 unsigned int index, unsigned int len, 290 const char *name, struct f2fs_xattr_entry **xe, 291 void **base_addr, int *base_size) 292 { 293 void *cur_addr, *txattr_addr, *last_addr = NULL; 294 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 295 unsigned int size = xnid ? VALID_XATTR_BLOCK_SIZE : 0; 296 unsigned int inline_size = inline_xattr_size(inode); 297 int err = 0; 298 299 if (!size && !inline_size) 300 return -ENODATA; 301 302 *base_size = inline_size + size + XATTR_PADDING_SIZE; 303 txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode), *base_size, GFP_NOFS); 304 if (!txattr_addr) 305 return -ENOMEM; 306 307 /* read from inline xattr */ 308 if (inline_size) { 309 err = read_inline_xattr(inode, ipage, txattr_addr); 310 if (err) 311 goto out; 312 313 *xe = __find_inline_xattr(inode, txattr_addr, &last_addr, 314 index, len, name); 315 if (*xe) { 316 *base_size = inline_size; 317 goto check; 318 } 319 } 320 321 /* read from xattr node block */ 322 if (xnid) { 323 err = read_xattr_block(inode, txattr_addr); 324 if (err) 325 goto out; 326 } 327 328 if (last_addr) 329 cur_addr = XATTR_HDR(last_addr) - 1; 330 else 331 cur_addr = txattr_addr; 332 333 *xe = __find_xattr(cur_addr, index, len, name); 334 check: 335 if (IS_XATTR_LAST_ENTRY(*xe)) { 336 err = -ENODATA; 337 goto out; 338 } 339 340 *base_addr = txattr_addr; 341 return 0; 342 out: 343 kzfree(txattr_addr); 344 return err; 345 } 346 347 static int read_all_xattrs(struct inode *inode, struct page *ipage, 348 void **base_addr) 349 { 350 struct f2fs_xattr_header *header; 351 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 352 unsigned int size = VALID_XATTR_BLOCK_SIZE; 353 unsigned int inline_size = inline_xattr_size(inode); 354 void *txattr_addr; 355 int err; 356 357 txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode), 358 inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS); 359 if (!txattr_addr) 360 return -ENOMEM; 361 362 /* read from inline xattr */ 363 if (inline_size) { 364 err = read_inline_xattr(inode, ipage, txattr_addr); 365 if (err) 366 goto fail; 367 } 368 369 /* read from xattr node block */ 370 if (xnid) { 371 err = read_xattr_block(inode, txattr_addr); 372 if (err) 373 goto fail; 374 } 375 376 header = XATTR_HDR(txattr_addr); 377 378 /* never been allocated xattrs */ 379 if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) { 380 header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC); 381 header->h_refcount = cpu_to_le32(1); 382 } 383 *base_addr = txattr_addr; 384 return 0; 385 fail: 386 kzfree(txattr_addr); 387 return err; 388 } 389 390 static inline int write_all_xattrs(struct inode *inode, __u32 hsize, 391 void *txattr_addr, struct page *ipage) 392 { 393 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 394 size_t inline_size = inline_xattr_size(inode); 395 struct page *in_page = NULL; 396 void *xattr_addr; 397 void *inline_addr = NULL; 398 struct page *xpage; 399 nid_t new_nid = 0; 400 int err = 0; 401 402 if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid) 403 if (!f2fs_alloc_nid(sbi, &new_nid)) 404 return -ENOSPC; 405 406 /* write to inline xattr */ 407 if (inline_size) { 408 if (ipage) { 409 inline_addr = inline_xattr_addr(inode, ipage); 410 } else { 411 in_page = f2fs_get_node_page(sbi, inode->i_ino); 412 if (IS_ERR(in_page)) { 413 f2fs_alloc_nid_failed(sbi, new_nid); 414 return PTR_ERR(in_page); 415 } 416 inline_addr = inline_xattr_addr(inode, in_page); 417 } 418 419 f2fs_wait_on_page_writeback(ipage ? ipage : in_page, 420 NODE, true, true); 421 /* no need to use xattr node block */ 422 if (hsize <= inline_size) { 423 err = f2fs_truncate_xattr_node(inode); 424 f2fs_alloc_nid_failed(sbi, new_nid); 425 if (err) { 426 f2fs_put_page(in_page, 1); 427 return err; 428 } 429 memcpy(inline_addr, txattr_addr, inline_size); 430 set_page_dirty(ipage ? ipage : in_page); 431 goto in_page_out; 432 } 433 } 434 435 /* write to xattr node block */ 436 if (F2FS_I(inode)->i_xattr_nid) { 437 xpage = f2fs_get_node_page(sbi, F2FS_I(inode)->i_xattr_nid); 438 if (IS_ERR(xpage)) { 439 err = PTR_ERR(xpage); 440 f2fs_alloc_nid_failed(sbi, new_nid); 441 goto in_page_out; 442 } 443 f2fs_bug_on(sbi, new_nid); 444 f2fs_wait_on_page_writeback(xpage, NODE, true, true); 445 } else { 446 struct dnode_of_data dn; 447 set_new_dnode(&dn, inode, NULL, NULL, new_nid); 448 xpage = f2fs_new_node_page(&dn, XATTR_NODE_OFFSET); 449 if (IS_ERR(xpage)) { 450 err = PTR_ERR(xpage); 451 f2fs_alloc_nid_failed(sbi, new_nid); 452 goto in_page_out; 453 } 454 f2fs_alloc_nid_done(sbi, new_nid); 455 } 456 xattr_addr = page_address(xpage); 457 458 if (inline_size) 459 memcpy(inline_addr, txattr_addr, inline_size); 460 memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE); 461 462 if (inline_size) 463 set_page_dirty(ipage ? ipage : in_page); 464 set_page_dirty(xpage); 465 466 f2fs_put_page(xpage, 1); 467 in_page_out: 468 f2fs_put_page(in_page, 1); 469 return err; 470 } 471 472 int f2fs_getxattr(struct inode *inode, int index, const char *name, 473 void *buffer, size_t buffer_size, struct page *ipage) 474 { 475 struct f2fs_xattr_entry *entry = NULL; 476 int error = 0; 477 unsigned int size, len; 478 void *base_addr = NULL; 479 int base_size; 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, &base_size); 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; 504 505 if (base_size - (pval - (char *)base_addr) < size) { 506 error = -ERANGE; 507 goto out; 508 } 509 memcpy(buffer, pval, size); 510 } 511 error = size; 512 out: 513 kzfree(base_addr); 514 return error; 515 } 516 517 ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) 518 { 519 struct inode *inode = d_inode(dentry); 520 struct f2fs_xattr_entry *entry; 521 void *base_addr; 522 int error = 0; 523 size_t rest = buffer_size; 524 525 down_read(&F2FS_I(inode)->i_xattr_sem); 526 error = read_all_xattrs(inode, NULL, &base_addr); 527 up_read(&F2FS_I(inode)->i_xattr_sem); 528 if (error) 529 return error; 530 531 list_for_each_xattr(entry, base_addr) { 532 const struct xattr_handler *handler = 533 f2fs_xattr_handler(entry->e_name_index); 534 const char *prefix; 535 size_t prefix_len; 536 size_t size; 537 538 if (!handler || (handler->list && !handler->list(dentry))) 539 continue; 540 541 prefix = xattr_prefix(handler); 542 prefix_len = strlen(prefix); 543 size = prefix_len + entry->e_name_len + 1; 544 if (buffer) { 545 if (size > rest) { 546 error = -ERANGE; 547 goto cleanup; 548 } 549 memcpy(buffer, prefix, prefix_len); 550 buffer += prefix_len; 551 memcpy(buffer, entry->e_name, entry->e_name_len); 552 buffer += entry->e_name_len; 553 *buffer++ = 0; 554 } 555 rest -= size; 556 } 557 error = buffer_size - rest; 558 cleanup: 559 kzfree(base_addr); 560 return error; 561 } 562 563 static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry, 564 const void *value, size_t size) 565 { 566 void *pval = entry->e_name + entry->e_name_len; 567 568 return (le16_to_cpu(entry->e_value_size) == size) && 569 !memcmp(pval, value, size); 570 } 571 572 static int __f2fs_setxattr(struct inode *inode, int index, 573 const char *name, const void *value, size_t size, 574 struct page *ipage, int flags) 575 { 576 struct f2fs_xattr_entry *here, *last; 577 void *base_addr; 578 int found, newsize; 579 size_t len; 580 __u32 new_hsize; 581 int error = 0; 582 583 if (name == NULL) 584 return -EINVAL; 585 586 if (value == NULL) 587 size = 0; 588 589 len = strlen(name); 590 591 if (len > F2FS_NAME_LEN) 592 return -ERANGE; 593 594 if (size > MAX_VALUE_LEN(inode)) 595 return -E2BIG; 596 597 error = read_all_xattrs(inode, ipage, &base_addr); 598 if (error) 599 return error; 600 601 /* find entry with wanted name. */ 602 here = __find_xattr(base_addr, index, len, name); 603 604 found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1; 605 606 if (found) { 607 if ((flags & XATTR_CREATE)) { 608 error = -EEXIST; 609 goto exit; 610 } 611 612 if (value && f2fs_xattr_value_same(here, value, size)) 613 goto exit; 614 } else if ((flags & XATTR_REPLACE)) { 615 error = -ENODATA; 616 goto exit; 617 } 618 619 last = here; 620 while (!IS_XATTR_LAST_ENTRY(last)) 621 last = XATTR_NEXT_ENTRY(last); 622 623 newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size); 624 625 /* 1. Check space */ 626 if (value) { 627 int free; 628 /* 629 * If value is NULL, it is remove operation. 630 * In case of update operation, we calculate free. 631 */ 632 free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr); 633 if (found) 634 free = free + ENTRY_SIZE(here); 635 636 if (unlikely(free < newsize)) { 637 error = -E2BIG; 638 goto exit; 639 } 640 } 641 642 /* 2. Remove old entry */ 643 if (found) { 644 /* 645 * If entry is found, remove old entry. 646 * If not found, remove operation is not needed. 647 */ 648 struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here); 649 int oldsize = ENTRY_SIZE(here); 650 651 memmove(here, next, (char *)last - (char *)next); 652 last = (struct f2fs_xattr_entry *)((char *)last - oldsize); 653 memset(last, 0, oldsize); 654 } 655 656 new_hsize = (char *)last - (char *)base_addr; 657 658 /* 3. Write new entry */ 659 if (value) { 660 char *pval; 661 /* 662 * Before we come here, old entry is removed. 663 * We just write new entry. 664 */ 665 last->e_name_index = index; 666 last->e_name_len = len; 667 memcpy(last->e_name, name, len); 668 pval = last->e_name + len; 669 memcpy(pval, value, size); 670 last->e_value_size = cpu_to_le16(size); 671 new_hsize += newsize; 672 } 673 674 error = write_all_xattrs(inode, new_hsize, base_addr, ipage); 675 if (error) 676 goto exit; 677 678 if (is_inode_flag_set(inode, FI_ACL_MODE)) { 679 inode->i_mode = F2FS_I(inode)->i_acl_mode; 680 inode->i_ctime = current_time(inode); 681 clear_inode_flag(inode, FI_ACL_MODE); 682 } 683 if (index == F2FS_XATTR_INDEX_ENCRYPTION && 684 !strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT)) 685 f2fs_set_encrypted_inode(inode); 686 f2fs_mark_inode_dirty_sync(inode, true); 687 if (!error && S_ISDIR(inode->i_mode)) 688 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP); 689 exit: 690 kzfree(base_addr); 691 return error; 692 } 693 694 int f2fs_setxattr(struct inode *inode, int index, const char *name, 695 const void *value, size_t size, 696 struct page *ipage, int flags) 697 { 698 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 699 int err; 700 701 err = dquot_initialize(inode); 702 if (err) 703 return err; 704 705 /* this case is only from f2fs_init_inode_metadata */ 706 if (ipage) 707 return __f2fs_setxattr(inode, index, name, value, 708 size, ipage, flags); 709 f2fs_balance_fs(sbi, true); 710 711 f2fs_lock_op(sbi); 712 /* protect xattr_ver */ 713 down_write(&F2FS_I(inode)->i_sem); 714 down_write(&F2FS_I(inode)->i_xattr_sem); 715 err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags); 716 up_write(&F2FS_I(inode)->i_xattr_sem); 717 up_write(&F2FS_I(inode)->i_sem); 718 f2fs_unlock_op(sbi); 719 720 f2fs_update_time(sbi, REQ_TIME); 721 return err; 722 } 723