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 void *max_addr = base_addr + inline_size; 228 229 list_for_each_xattr(entry, base_addr) { 230 if ((void *)entry + sizeof(__u32) > max_addr || 231 (void *)XATTR_NEXT_ENTRY(entry) > max_addr) { 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 } 242 243 /* inline xattr header or entry across max inline xattr size */ 244 if (IS_XATTR_LAST_ENTRY(entry) && 245 (void *)entry + sizeof(__u32) > max_addr) { 246 *last_addr = entry; 247 return NULL; 248 } 249 return entry; 250 } 251 252 static int read_inline_xattr(struct inode *inode, struct page *ipage, 253 void *txattr_addr) 254 { 255 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 256 unsigned int inline_size = inline_xattr_size(inode); 257 struct page *page = NULL; 258 void *inline_addr; 259 260 if (ipage) { 261 inline_addr = inline_xattr_addr(inode, ipage); 262 } else { 263 page = f2fs_get_node_page(sbi, inode->i_ino); 264 if (IS_ERR(page)) 265 return PTR_ERR(page); 266 267 inline_addr = inline_xattr_addr(inode, page); 268 } 269 memcpy(txattr_addr, inline_addr, inline_size); 270 f2fs_put_page(page, 1); 271 272 return 0; 273 } 274 275 static int read_xattr_block(struct inode *inode, void *txattr_addr) 276 { 277 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 278 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 279 unsigned int inline_size = inline_xattr_size(inode); 280 struct page *xpage; 281 void *xattr_addr; 282 283 /* The inode already has an extended attribute block. */ 284 xpage = f2fs_get_node_page(sbi, xnid); 285 if (IS_ERR(xpage)) 286 return PTR_ERR(xpage); 287 288 xattr_addr = page_address(xpage); 289 memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE); 290 f2fs_put_page(xpage, 1); 291 292 return 0; 293 } 294 295 static int lookup_all_xattrs(struct inode *inode, struct page *ipage, 296 unsigned int index, unsigned int len, 297 const char *name, struct f2fs_xattr_entry **xe, 298 void **base_addr, int *base_size) 299 { 300 void *cur_addr, *txattr_addr, *last_addr = NULL; 301 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 302 unsigned int size = xnid ? VALID_XATTR_BLOCK_SIZE : 0; 303 unsigned int inline_size = inline_xattr_size(inode); 304 int err = 0; 305 306 if (!size && !inline_size) 307 return -ENODATA; 308 309 *base_size = inline_size + size + XATTR_PADDING_SIZE; 310 txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode), *base_size, GFP_NOFS); 311 if (!txattr_addr) 312 return -ENOMEM; 313 314 /* read from inline xattr */ 315 if (inline_size) { 316 err = read_inline_xattr(inode, ipage, txattr_addr); 317 if (err) 318 goto out; 319 320 *xe = __find_inline_xattr(inode, txattr_addr, &last_addr, 321 index, len, name); 322 if (*xe) { 323 *base_size = inline_size; 324 goto check; 325 } 326 } 327 328 /* read from xattr node block */ 329 if (xnid) { 330 err = read_xattr_block(inode, txattr_addr); 331 if (err) 332 goto out; 333 } 334 335 if (last_addr) 336 cur_addr = XATTR_HDR(last_addr) - 1; 337 else 338 cur_addr = txattr_addr; 339 340 *xe = __find_xattr(cur_addr, index, len, name); 341 check: 342 if (IS_XATTR_LAST_ENTRY(*xe)) { 343 err = -ENODATA; 344 goto out; 345 } 346 347 *base_addr = txattr_addr; 348 return 0; 349 out: 350 kvfree(txattr_addr); 351 return err; 352 } 353 354 static int read_all_xattrs(struct inode *inode, struct page *ipage, 355 void **base_addr) 356 { 357 struct f2fs_xattr_header *header; 358 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 359 unsigned int size = VALID_XATTR_BLOCK_SIZE; 360 unsigned int inline_size = inline_xattr_size(inode); 361 void *txattr_addr; 362 int err; 363 364 txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode), 365 inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS); 366 if (!txattr_addr) 367 return -ENOMEM; 368 369 /* read from inline xattr */ 370 if (inline_size) { 371 err = read_inline_xattr(inode, ipage, txattr_addr); 372 if (err) 373 goto fail; 374 } 375 376 /* read from xattr node block */ 377 if (xnid) { 378 err = read_xattr_block(inode, txattr_addr); 379 if (err) 380 goto fail; 381 } 382 383 header = XATTR_HDR(txattr_addr); 384 385 /* never been allocated xattrs */ 386 if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) { 387 header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC); 388 header->h_refcount = cpu_to_le32(1); 389 } 390 *base_addr = txattr_addr; 391 return 0; 392 fail: 393 kvfree(txattr_addr); 394 return err; 395 } 396 397 static inline int write_all_xattrs(struct inode *inode, __u32 hsize, 398 void *txattr_addr, struct page *ipage) 399 { 400 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 401 size_t inline_size = inline_xattr_size(inode); 402 struct page *in_page = NULL; 403 void *xattr_addr; 404 void *inline_addr = NULL; 405 struct page *xpage; 406 nid_t new_nid = 0; 407 int err = 0; 408 409 if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid) 410 if (!f2fs_alloc_nid(sbi, &new_nid)) 411 return -ENOSPC; 412 413 /* write to inline xattr */ 414 if (inline_size) { 415 if (ipage) { 416 inline_addr = inline_xattr_addr(inode, ipage); 417 } else { 418 in_page = f2fs_get_node_page(sbi, inode->i_ino); 419 if (IS_ERR(in_page)) { 420 f2fs_alloc_nid_failed(sbi, new_nid); 421 return PTR_ERR(in_page); 422 } 423 inline_addr = inline_xattr_addr(inode, in_page); 424 } 425 426 f2fs_wait_on_page_writeback(ipage ? ipage : in_page, 427 NODE, true, true); 428 /* no need to use xattr node block */ 429 if (hsize <= inline_size) { 430 err = f2fs_truncate_xattr_node(inode); 431 f2fs_alloc_nid_failed(sbi, new_nid); 432 if (err) { 433 f2fs_put_page(in_page, 1); 434 return err; 435 } 436 memcpy(inline_addr, txattr_addr, inline_size); 437 set_page_dirty(ipage ? ipage : in_page); 438 goto in_page_out; 439 } 440 } 441 442 /* write to xattr node block */ 443 if (F2FS_I(inode)->i_xattr_nid) { 444 xpage = f2fs_get_node_page(sbi, F2FS_I(inode)->i_xattr_nid); 445 if (IS_ERR(xpage)) { 446 err = PTR_ERR(xpage); 447 f2fs_alloc_nid_failed(sbi, new_nid); 448 goto in_page_out; 449 } 450 f2fs_bug_on(sbi, new_nid); 451 f2fs_wait_on_page_writeback(xpage, NODE, true, true); 452 } else { 453 struct dnode_of_data dn; 454 set_new_dnode(&dn, inode, NULL, NULL, new_nid); 455 xpage = f2fs_new_node_page(&dn, XATTR_NODE_OFFSET); 456 if (IS_ERR(xpage)) { 457 err = PTR_ERR(xpage); 458 f2fs_alloc_nid_failed(sbi, new_nid); 459 goto in_page_out; 460 } 461 f2fs_alloc_nid_done(sbi, new_nid); 462 } 463 xattr_addr = page_address(xpage); 464 465 if (inline_size) 466 memcpy(inline_addr, txattr_addr, inline_size); 467 memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE); 468 469 if (inline_size) 470 set_page_dirty(ipage ? ipage : in_page); 471 set_page_dirty(xpage); 472 473 f2fs_put_page(xpage, 1); 474 in_page_out: 475 f2fs_put_page(in_page, 1); 476 return err; 477 } 478 479 int f2fs_getxattr(struct inode *inode, int index, const char *name, 480 void *buffer, size_t buffer_size, struct page *ipage) 481 { 482 struct f2fs_xattr_entry *entry = NULL; 483 int error = 0; 484 unsigned int size, len; 485 void *base_addr = NULL; 486 int base_size; 487 488 if (name == NULL) 489 return -EINVAL; 490 491 len = strlen(name); 492 if (len > F2FS_NAME_LEN) 493 return -ERANGE; 494 495 down_read(&F2FS_I(inode)->i_xattr_sem); 496 error = lookup_all_xattrs(inode, ipage, index, len, name, 497 &entry, &base_addr, &base_size); 498 up_read(&F2FS_I(inode)->i_xattr_sem); 499 if (error) 500 return error; 501 502 size = le16_to_cpu(entry->e_value_size); 503 504 if (buffer && size > buffer_size) { 505 error = -ERANGE; 506 goto out; 507 } 508 509 if (buffer) { 510 char *pval = entry->e_name + entry->e_name_len; 511 512 if (base_size - (pval - (char *)base_addr) < size) { 513 error = -ERANGE; 514 goto out; 515 } 516 memcpy(buffer, pval, size); 517 } 518 error = size; 519 out: 520 kvfree(base_addr); 521 return error; 522 } 523 524 ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) 525 { 526 struct inode *inode = d_inode(dentry); 527 struct f2fs_xattr_entry *entry; 528 void *base_addr; 529 int error = 0; 530 size_t rest = buffer_size; 531 532 down_read(&F2FS_I(inode)->i_xattr_sem); 533 error = read_all_xattrs(inode, NULL, &base_addr); 534 up_read(&F2FS_I(inode)->i_xattr_sem); 535 if (error) 536 return error; 537 538 list_for_each_xattr(entry, base_addr) { 539 const struct xattr_handler *handler = 540 f2fs_xattr_handler(entry->e_name_index); 541 const char *prefix; 542 size_t prefix_len; 543 size_t size; 544 545 if (!handler || (handler->list && !handler->list(dentry))) 546 continue; 547 548 prefix = xattr_prefix(handler); 549 prefix_len = strlen(prefix); 550 size = prefix_len + entry->e_name_len + 1; 551 if (buffer) { 552 if (size > rest) { 553 error = -ERANGE; 554 goto cleanup; 555 } 556 memcpy(buffer, prefix, prefix_len); 557 buffer += prefix_len; 558 memcpy(buffer, entry->e_name, entry->e_name_len); 559 buffer += entry->e_name_len; 560 *buffer++ = 0; 561 } 562 rest -= size; 563 } 564 error = buffer_size - rest; 565 cleanup: 566 kvfree(base_addr); 567 return error; 568 } 569 570 static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry, 571 const void *value, size_t size) 572 { 573 void *pval = entry->e_name + entry->e_name_len; 574 575 return (le16_to_cpu(entry->e_value_size) == size) && 576 !memcmp(pval, value, size); 577 } 578 579 static int __f2fs_setxattr(struct inode *inode, int index, 580 const char *name, const void *value, size_t size, 581 struct page *ipage, int flags) 582 { 583 struct f2fs_xattr_entry *here, *last; 584 void *base_addr; 585 int found, newsize; 586 size_t len; 587 __u32 new_hsize; 588 int error = 0; 589 590 if (name == NULL) 591 return -EINVAL; 592 593 if (value == NULL) 594 size = 0; 595 596 len = strlen(name); 597 598 if (len > F2FS_NAME_LEN) 599 return -ERANGE; 600 601 if (size > MAX_VALUE_LEN(inode)) 602 return -E2BIG; 603 604 error = read_all_xattrs(inode, ipage, &base_addr); 605 if (error) 606 return error; 607 608 /* find entry with wanted name. */ 609 here = __find_xattr(base_addr, index, len, name); 610 611 found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1; 612 613 if (found) { 614 if ((flags & XATTR_CREATE)) { 615 error = -EEXIST; 616 goto exit; 617 } 618 619 if (value && f2fs_xattr_value_same(here, value, size)) 620 goto exit; 621 } else if ((flags & XATTR_REPLACE)) { 622 error = -ENODATA; 623 goto exit; 624 } 625 626 last = here; 627 while (!IS_XATTR_LAST_ENTRY(last)) 628 last = XATTR_NEXT_ENTRY(last); 629 630 newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size); 631 632 /* 1. Check space */ 633 if (value) { 634 int free; 635 /* 636 * If value is NULL, it is remove operation. 637 * In case of update operation, we calculate free. 638 */ 639 free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr); 640 if (found) 641 free = free + ENTRY_SIZE(here); 642 643 if (unlikely(free < newsize)) { 644 error = -E2BIG; 645 goto exit; 646 } 647 } 648 649 /* 2. Remove old entry */ 650 if (found) { 651 /* 652 * If entry is found, remove old entry. 653 * If not found, remove operation is not needed. 654 */ 655 struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here); 656 int oldsize = ENTRY_SIZE(here); 657 658 memmove(here, next, (char *)last - (char *)next); 659 last = (struct f2fs_xattr_entry *)((char *)last - oldsize); 660 memset(last, 0, oldsize); 661 } 662 663 new_hsize = (char *)last - (char *)base_addr; 664 665 /* 3. Write new entry */ 666 if (value) { 667 char *pval; 668 /* 669 * Before we come here, old entry is removed. 670 * We just write new entry. 671 */ 672 last->e_name_index = index; 673 last->e_name_len = len; 674 memcpy(last->e_name, name, len); 675 pval = last->e_name + len; 676 memcpy(pval, value, size); 677 last->e_value_size = cpu_to_le16(size); 678 new_hsize += newsize; 679 } 680 681 error = write_all_xattrs(inode, new_hsize, base_addr, ipage); 682 if (error) 683 goto exit; 684 685 if (is_inode_flag_set(inode, FI_ACL_MODE)) { 686 inode->i_mode = F2FS_I(inode)->i_acl_mode; 687 inode->i_ctime = current_time(inode); 688 clear_inode_flag(inode, FI_ACL_MODE); 689 } 690 if (index == F2FS_XATTR_INDEX_ENCRYPTION && 691 !strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT)) 692 f2fs_set_encrypted_inode(inode); 693 f2fs_mark_inode_dirty_sync(inode, true); 694 if (!error && S_ISDIR(inode->i_mode)) 695 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP); 696 exit: 697 kvfree(base_addr); 698 return error; 699 } 700 701 int f2fs_setxattr(struct inode *inode, int index, const char *name, 702 const void *value, size_t size, 703 struct page *ipage, int flags) 704 { 705 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 706 int err; 707 708 err = dquot_initialize(inode); 709 if (err) 710 return err; 711 712 /* this case is only from f2fs_init_inode_metadata */ 713 if (ipage) 714 return __f2fs_setxattr(inode, index, name, value, 715 size, ipage, flags); 716 f2fs_balance_fs(sbi, true); 717 718 f2fs_lock_op(sbi); 719 /* protect xattr_ver */ 720 down_write(&F2FS_I(inode)->i_sem); 721 down_write(&F2FS_I(inode)->i_xattr_sem); 722 err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags); 723 up_write(&F2FS_I(inode)->i_xattr_sem); 724 up_write(&F2FS_I(inode)->i_sem); 725 f2fs_unlock_op(sbi); 726 727 f2fs_update_time(sbi, REQ_TIME); 728 return err; 729 } 730