fs/f2fs/xattr.c

   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                 if (!capable(CAP_SYS_ADMIN))
  41                         return -EPERM;
  42                 break;
  43         case F2FS_XATTR_INDEX_SECURITY:
  44                 break;
  45         default:
  46                 return -EINVAL;
  47         }
  48         return f2fs_getxattr(inode, handler->flags, name,
  49                              buffer, size, NULL);
  50 }
  51
  52 static int f2fs_xattr_generic_set(const struct xattr_handler *handler,
  53                 struct dentry *unused, struct inode *inode,
  54                 const char *name, const void *value,
  55                 size_t size, int flags)
  56 {
  57         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
  58
  59         switch (handler->flags) {
  60         case F2FS_XATTR_INDEX_USER:
  61                 if (!test_opt(sbi, XATTR_USER))
  62                         return -EOPNOTSUPP;
  63                 break;
  64         case F2FS_XATTR_INDEX_TRUSTED:
  65                 if (!capable(CAP_SYS_ADMIN))
  66                         return -EPERM;
  67                 break;
  68         case F2FS_XATTR_INDEX_SECURITY:
  69                 break;
  70         default:
  71                 return -EINVAL;
  72         }
  73         return f2fs_setxattr(inode, handler->flags, name,
  74                                         value, size, NULL, flags);
  75 }
  76
  77 static bool f2fs_xattr_user_list(struct dentry *dentry)
  78 {
  79         struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
  80
  81         return test_opt(sbi, XATTR_USER);
  82 }
  83
  84 static bool f2fs_xattr_trusted_list(struct dentry *dentry)
  85 {
  86         return capable(CAP_SYS_ADMIN);
  87 }
  88
  89 static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
  90                 struct dentry *unused, struct inode *inode,
  91                 const char *name, void *buffer, size_t size)
  92 {
  93         if (buffer)
  94                 *((char *)buffer) = F2FS_I(inode)->i_advise;
  95         return sizeof(char);
  96 }
  97
  98 static int f2fs_xattr_advise_set(const struct xattr_handler *handler,
  99                 struct dentry *unused, struct inode *inode,
 100                 const char *name, const void *value,
 101                 size_t size, int flags)
 102 {
 103         if (!inode_owner_or_capable(inode))
 104                 return -EPERM;
 105         if (value == NULL)
 106                 return -EINVAL;
 107
 108         F2FS_I(inode)->i_advise |= *(char *)value;
 109         f2fs_mark_inode_dirty_sync(inode, true);
 110         return 0;
 111 }
 112
 113 #ifdef CONFIG_F2FS_FS_SECURITY
 114 static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
 115                 void *page)
 116 {
 117         const struct xattr *xattr;
 118         int err = 0;
 119
 120         for (xattr = xattr_array; xattr->name != NULL; xattr++) {
 121                 err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY,
 122                                 xattr->name, xattr->value,
 123                                 xattr->value_len, (struct page *)page, 0);
 124                 if (err < 0)
 125                         break;
 126         }
 127         return err;
 128 }
 129
 130 int f2fs_init_security(struct inode *inode, struct inode *dir,
 131                                 const struct qstr *qstr, struct page *ipage)
 132 {
 133         return security_inode_init_security(inode, dir, qstr,
 134                                 &f2fs_initxattrs, ipage);
 135 }
 136 #endif
 137
 138 const struct xattr_handler f2fs_xattr_user_handler = {
 139         .prefix = XATTR_USER_PREFIX,
 140         .flags  = F2FS_XATTR_INDEX_USER,
 141         .list   = f2fs_xattr_user_list,
 142         .get    = f2fs_xattr_generic_get,
 143         .set    = f2fs_xattr_generic_set,
 144 };
 145
 146 const struct xattr_handler f2fs_xattr_trusted_handler = {
 147         .prefix = XATTR_TRUSTED_PREFIX,
 148         .flags  = F2FS_XATTR_INDEX_TRUSTED,
 149         .list   = f2fs_xattr_trusted_list,
 150         .get    = f2fs_xattr_generic_get,
 151         .set    = f2fs_xattr_generic_set,
 152 };
 153
 154 const struct xattr_handler f2fs_xattr_advise_handler = {
 155         .name   = F2FS_SYSTEM_ADVISE_NAME,
 156         .flags  = F2FS_XATTR_INDEX_ADVISE,
 157         .get    = f2fs_xattr_advise_get,
 158         .set    = f2fs_xattr_advise_set,
 159 };
 160
 161 const struct xattr_handler f2fs_xattr_security_handler = {
 162         .prefix = XATTR_SECURITY_PREFIX,
 163         .flags  = F2FS_XATTR_INDEX_SECURITY,
 164         .get    = f2fs_xattr_generic_get,
 165         .set    = f2fs_xattr_generic_set,
 166 };
 167
 168 static const struct xattr_handler *f2fs_xattr_handler_map[] = {
 169         [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
 170 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 171         [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
 172         [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
 173 #endif
 174         [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
 175 #ifdef CONFIG_F2FS_FS_SECURITY
 176         [F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler,
 177 #endif
 178         [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
 179 };
 180
 181 const struct xattr_handler *f2fs_xattr_handlers[] = {
 182         &f2fs_xattr_user_handler,
 183 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 184         &posix_acl_access_xattr_handler,
 185         &posix_acl_default_xattr_handler,
 186 #endif
 187         &f2fs_xattr_trusted_handler,
 188 #ifdef CONFIG_F2FS_FS_SECURITY
 189         &f2fs_xattr_security_handler,
 190 #endif
 191         &f2fs_xattr_advise_handler,
 192         NULL,
 193 };
 194
 195 static inline const struct xattr_handler *f2fs_xattr_handler(int index)
 196 {
 197         const struct xattr_handler *handler = NULL;
 198
 199         if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
 200                 handler = f2fs_xattr_handler_map[index];
 201         return handler;
 202 }
 203
 204 static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int index,
 205                                         size_t len, const char *name)
 206 {
 207         struct f2fs_xattr_entry *entry;
 208
 209         list_for_each_xattr(entry, base_addr) {
 210                 if (entry->e_name_index != index)
 211                         continue;
 212                 if (entry->e_name_len != len)
 213                         continue;
 214                 if (!memcmp(entry->e_name, name, len))
 215                         break;
 216         }
 217         return entry;
 218 }
 219
 220 static struct f2fs_xattr_entry *__find_inline_xattr(void *base_addr,
 221                                         void **last_addr, int index,
 222                                         size_t len, const char *name)
 223 {
 224         struct f2fs_xattr_entry *entry;
 225         unsigned int inline_size = F2FS_INLINE_XATTR_ADDRS << 2;
 226
 227         list_for_each_xattr(entry, base_addr) {
 228                 if ((void *)entry + sizeof(__u32) > base_addr + inline_size ||
 229                         (void *)XATTR_NEXT_ENTRY(entry) + sizeof(__u32) >
 230                         base_addr + inline_size) {
 231                         *last_addr = entry;
 232                         return NULL;
 233                 }
 234                 if (entry->e_name_index != index)
 235                         continue;
 236                 if (entry->e_name_len != len)
 237                         continue;
 238                 if (!memcmp(entry->e_name, name, len))
 239                         break;
 240         }
 241         return entry;
 242 }
 243
 244 static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
 245                                 unsigned int index, unsigned int len,
 246                                 const char *name, struct f2fs_xattr_entry **xe,
 247                                 void **base_addr)
 248 {
 249         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 250         void *cur_addr, *txattr_addr, *last_addr = NULL;
 251         nid_t xnid = F2FS_I(inode)->i_xattr_nid;
 252         unsigned int size = xnid ? VALID_XATTR_BLOCK_SIZE : 0;
 253         unsigned int inline_size = inline_xattr_size(inode);
 254         int err = 0;
 255
 256         if (!size && !inline_size)
 257                 return -ENODATA;
 258
 259         txattr_addr = kzalloc(inline_size + size + XATTR_PADDING_SIZE,
 260                                                         GFP_F2FS_ZERO);
 261         if (!txattr_addr)
 262                 return -ENOMEM;
 263
 264         /* read from inline xattr */
 265         if (inline_size) {
 266                 struct page *page = NULL;
 267                 void *inline_addr;
 268
 269                 if (ipage) {
 270                         inline_addr = inline_xattr_addr(ipage);
 271                 } else {
 272                         page = get_node_page(sbi, inode->i_ino);
 273                         if (IS_ERR(page)) {
 274                                 err = PTR_ERR(page);
 275                                 goto out;
 276                         }
 277                         inline_addr = inline_xattr_addr(page);
 278                 }
 279                 memcpy(txattr_addr, inline_addr, inline_size);
 280                 f2fs_put_page(page, 1);
 281
 282                 *xe = __find_inline_xattr(txattr_addr, &last_addr,
 283                                                 index, len, name);
 284                 if (*xe)
 285                         goto check;
 286         }
 287
 288         /* read from xattr node block */
 289         if (xnid) {
 290                 struct page *xpage;
 291                 void *xattr_addr;
 292
 293                 /* The inode already has an extended attribute block. */
 294                 xpage = get_node_page(sbi, xnid);
 295                 if (IS_ERR(xpage)) {
 296                         err = PTR_ERR(xpage);
 297                         goto out;
 298                 }
 299
 300                 xattr_addr = page_address(xpage);
 301                 memcpy(txattr_addr + inline_size, xattr_addr, size);
 302                 f2fs_put_page(xpage, 1);
 303         }
 304
 305         if (last_addr)
 306                 cur_addr = XATTR_HDR(last_addr) - 1;
 307         else
 308                 cur_addr = txattr_addr;
 309
 310         *xe = __find_xattr(cur_addr, index, len, name);
 311 check:
 312         if (IS_XATTR_LAST_ENTRY(*xe)) {
 313                 err = -ENODATA;
 314                 goto out;
 315         }
 316
 317         *base_addr = txattr_addr;
 318         return 0;
 319 out:
 320         kzfree(txattr_addr);
 321         return err;
 322 }
 323
 324 static int read_all_xattrs(struct inode *inode, struct page *ipage,
 325                                                         void **base_addr)
 326 {
 327         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 328         struct f2fs_xattr_header *header;
 329         nid_t xnid = F2FS_I(inode)->i_xattr_nid;
 330         unsigned int size = VALID_XATTR_BLOCK_SIZE;
 331         unsigned int inline_size = inline_xattr_size(inode);
 332         void *txattr_addr;
 333         int err;
 334
 335         txattr_addr = kzalloc(inline_size + size + XATTR_PADDING_SIZE,
 336                                                         GFP_F2FS_ZERO);
 337         if (!txattr_addr)
 338                 return -ENOMEM;
 339
 340         /* read from inline xattr */
 341         if (inline_size) {
 342                 struct page *page = NULL;
 343                 void *inline_addr;
 344
 345                 if (ipage) {
 346                         inline_addr = inline_xattr_addr(ipage);
 347                 } else {
 348                         page = get_node_page(sbi, inode->i_ino);
 349                         if (IS_ERR(page)) {
 350                                 err = PTR_ERR(page);
 351                                 goto fail;
 352                         }
 353                         inline_addr = inline_xattr_addr(page);
 354                 }
 355                 memcpy(txattr_addr, inline_addr, inline_size);
 356                 f2fs_put_page(page, 1);
 357         }
 358
 359         /* read from xattr node block */
 360         if (xnid) {
 361                 struct page *xpage;
 362                 void *xattr_addr;
 363
 364                 /* The inode already has an extended attribute block. */
 365                 xpage = get_node_page(sbi, xnid);
 366                 if (IS_ERR(xpage)) {
 367                         err = PTR_ERR(xpage);
 368                         goto fail;
 369                 }
 370
 371                 xattr_addr = page_address(xpage);
 372                 memcpy(txattr_addr + inline_size, xattr_addr, size);
 373                 f2fs_put_page(xpage, 1);
 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         void *xattr_addr;
 396         struct page *xpage;
 397         nid_t new_nid = 0;
 398         int err;
 399
 400         if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
 401                 if (!alloc_nid(sbi, &new_nid))
 402                         return -ENOSPC;
 403
 404         /* write to inline xattr */
 405         if (inline_size) {
 406                 struct page *page = NULL;
 407                 void *inline_addr;
 408
 409                 if (ipage) {
 410                         inline_addr = inline_xattr_addr(ipage);
 411                         f2fs_wait_on_page_writeback(ipage, NODE, true);
 412                         set_page_dirty(ipage);
 413                 } else {
 414                         page = get_node_page(sbi, inode->i_ino);
 415                         if (IS_ERR(page)) {
 416                                 alloc_nid_failed(sbi, new_nid);
 417                                 return PTR_ERR(page);
 418                         }
 419                         inline_addr = inline_xattr_addr(page);
 420                         f2fs_wait_on_page_writeback(page, NODE, true);
 421                 }
 422                 memcpy(inline_addr, txattr_addr, inline_size);
 423                 f2fs_put_page(page, 1);
 424
 425                 /* no need to use xattr node block */
 426                 if (hsize <= inline_size) {
 427                         err = truncate_xattr_node(inode, ipage);
 428                         alloc_nid_failed(sbi, new_nid);
 429                         return err;
 430                 }
 431         }
 432
 433         /* write to xattr node block */
 434         if (F2FS_I(inode)->i_xattr_nid) {
 435                 xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
 436                 if (IS_ERR(xpage)) {
 437                         alloc_nid_failed(sbi, new_nid);
 438                         return PTR_ERR(xpage);
 439                 }
 440                 f2fs_bug_on(sbi, new_nid);
 441                 f2fs_wait_on_page_writeback(xpage, NODE, true);
 442         } else {
 443                 struct dnode_of_data dn;
 444                 set_new_dnode(&dn, inode, NULL, NULL, new_nid);
 445                 xpage = new_node_page(&dn, XATTR_NODE_OFFSET);
 446                 if (IS_ERR(xpage)) {
 447                         alloc_nid_failed(sbi, new_nid);
 448                         return PTR_ERR(xpage);
 449                 }
 450                 alloc_nid_done(sbi, new_nid);
 451         }
 452
 453         xattr_addr = page_address(xpage);
 454         memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE);
 455         set_page_dirty(xpage);
 456         f2fs_put_page(xpage, 1);
 457
 458         return 0;
 459 }
 460
 461 int f2fs_getxattr(struct inode *inode, int index, const char *name,
 462                 void *buffer, size_t buffer_size, struct page *ipage)
 463 {
 464         struct f2fs_xattr_entry *entry = NULL;
 465         int error = 0;
 466         unsigned int size, len;
 467         void *base_addr = NULL;
 468
 469         if (name == NULL)
 470                 return -EINVAL;
 471
 472         len = strlen(name);
 473         if (len > F2FS_NAME_LEN)
 474                 return -ERANGE;
 475
 476         down_read(&F2FS_I(inode)->i_xattr_sem);
 477         error = lookup_all_xattrs(inode, ipage, index, len, name,
 478                                 &entry, &base_addr);
 479         up_read(&F2FS_I(inode)->i_xattr_sem);
 480         if (error)
 481                 return error;
 482
 483         size = le16_to_cpu(entry->e_value_size);
 484
 485         if (buffer && size > buffer_size) {
 486                 error = -ERANGE;
 487                 goto out;
 488         }
 489
 490         if (buffer) {
 491                 char *pval = entry->e_name + entry->e_name_len;
 492                 memcpy(buffer, pval, size);
 493         }
 494         error = size;
 495 out:
 496         kzfree(base_addr);
 497         return error;
 498 }
 499
 500 ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
 501 {
 502         struct inode *inode = d_inode(dentry);
 503         struct f2fs_xattr_entry *entry;
 504         void *base_addr;
 505         int error = 0;
 506         size_t rest = buffer_size;
 507
 508         down_read(&F2FS_I(inode)->i_xattr_sem);
 509         error = read_all_xattrs(inode, NULL, &base_addr);
 510         up_read(&F2FS_I(inode)->i_xattr_sem);
 511         if (error)
 512                 return error;
 513
 514         list_for_each_xattr(entry, base_addr) {
 515                 const struct xattr_handler *handler =
 516                         f2fs_xattr_handler(entry->e_name_index);
 517                 const char *prefix;
 518                 size_t prefix_len;
 519                 size_t size;
 520
 521                 if (!handler || (handler->list && !handler->list(dentry)))
 522                         continue;
 523
 524                 prefix = handler->prefix ?: handler->name;
 525                 prefix_len = strlen(prefix);
 526                 size = prefix_len + entry->e_name_len + 1;
 527                 if (buffer) {
 528                         if (size > rest) {
 529                                 error = -ERANGE;
 530                                 goto cleanup;
 531                         }
 532                         memcpy(buffer, prefix, prefix_len);
 533                         buffer += prefix_len;
 534                         memcpy(buffer, entry->e_name, entry->e_name_len);
 535                         buffer += entry->e_name_len;
 536                         *buffer++ = 0;
 537                 }
 538                 rest -= size;
 539         }
 540         error = buffer_size - rest;
 541 cleanup:
 542         kzfree(base_addr);
 543         return error;
 544 }
 545
 546 static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry,
 547                                         const void *value, size_t size)
 548 {
 549         void *pval = entry->e_name + entry->e_name_len;
 550
 551         return (le16_to_cpu(entry->e_value_size) == size) &&
 552                                         !memcmp(pval, value, size);
 553 }
 554
 555 static int __f2fs_setxattr(struct inode *inode, int index,
 556                         const char *name, const void *value, size_t size,
 557                         struct page *ipage, int flags)
 558 {
 559         struct f2fs_xattr_entry *here, *last;
 560         void *base_addr;
 561         int found, newsize;
 562         size_t len;
 563         __u32 new_hsize;
 564         int error = 0;
 565
 566         if (name == NULL)
 567                 return -EINVAL;
 568
 569         if (value == NULL)
 570                 size = 0;
 571
 572         len = strlen(name);
 573
 574         if (len > F2FS_NAME_LEN)
 575                 return -ERANGE;
 576
 577         if (size > MAX_VALUE_LEN(inode))
 578                 return -E2BIG;
 579
 580         error = read_all_xattrs(inode, ipage, &base_addr);
 581         if (error)
 582                 return error;
 583
 584         /* find entry with wanted name. */
 585         here = __find_xattr(base_addr, index, len, name);
 586
 587         found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1;
 588
 589         if (found) {
 590                 if ((flags & XATTR_CREATE)) {
 591                         error = -EEXIST;
 592                         goto exit;
 593                 }
 594
 595                 if (f2fs_xattr_value_same(here, value, size))
 596                         goto exit;
 597         } else if ((flags & XATTR_REPLACE)) {
 598                 error = -ENODATA;
 599                 goto exit;
 600         }
 601
 602         last = here;
 603         while (!IS_XATTR_LAST_ENTRY(last))
 604                 last = XATTR_NEXT_ENTRY(last);
 605
 606         newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size);
 607
 608         /* 1. Check space */
 609         if (value) {
 610                 int free;
 611                 /*
 612                  * If value is NULL, it is remove operation.
 613                  * In case of update operation, we calculate free.
 614                  */
 615                 free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr);
 616                 if (found)
 617                         free = free + ENTRY_SIZE(here);
 618
 619                 if (unlikely(free < newsize)) {
 620                         error = -E2BIG;
 621                         goto exit;
 622                 }
 623         }
 624
 625         /* 2. Remove old entry */
 626         if (found) {
 627                 /*
 628                  * If entry is found, remove old entry.
 629                  * If not found, remove operation is not needed.
 630                  */
 631                 struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
 632                 int oldsize = ENTRY_SIZE(here);
 633
 634                 memmove(here, next, (char *)last - (char *)next);
 635                 last = (struct f2fs_xattr_entry *)((char *)last - oldsize);
 636                 memset(last, 0, oldsize);
 637         }
 638
 639         new_hsize = (char *)last - (char *)base_addr;
 640
 641         /* 3. Write new entry */
 642         if (value) {
 643                 char *pval;
 644                 /*
 645                  * Before we come here, old entry is removed.
 646                  * We just write new entry.
 647                  */
 648                 last->e_name_index = index;
 649                 last->e_name_len = len;
 650                 memcpy(last->e_name, name, len);
 651                 pval = last->e_name + len;
 652                 memcpy(pval, value, size);
 653                 last->e_value_size = cpu_to_le16(size);
 654                 new_hsize += newsize;
 655         }
 656
 657         error = write_all_xattrs(inode, new_hsize, base_addr, ipage);
 658         if (error)
 659                 goto exit;
 660
 661         if (is_inode_flag_set(inode, FI_ACL_MODE)) {
 662                 inode->i_mode = F2FS_I(inode)->i_acl_mode;
 663                 inode->i_ctime = current_time(inode);
 664                 clear_inode_flag(inode, FI_ACL_MODE);
 665         }
 666         if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
 667                         !strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
 668                 f2fs_set_encrypted_inode(inode);
 669         f2fs_mark_inode_dirty_sync(inode, true);
 670         if (!error && S_ISDIR(inode->i_mode))
 671                 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
 672 exit:
 673         kzfree(base_addr);
 674         return error;
 675 }
 676
 677 int f2fs_setxattr(struct inode *inode, int index, const char *name,
 678                                 const void *value, size_t size,
 679                                 struct page *ipage, int flags)
 680 {
 681         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 682         int err;
 683
 684         /* this case is only from init_inode_metadata */
 685         if (ipage)
 686                 return __f2fs_setxattr(inode, index, name, value,
 687                                                 size, ipage, flags);
 688         f2fs_balance_fs(sbi, true);
 689
 690         f2fs_lock_op(sbi);
 691         /* protect xattr_ver */
 692         down_write(&F2FS_I(inode)->i_sem);
 693         down_write(&F2FS_I(inode)->i_xattr_sem);
 694         err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags);
 695         up_write(&F2FS_I(inode)->i_xattr_sem);
 696         up_write(&F2FS_I(inode)->i_sem);
 697         f2fs_unlock_op(sbi);
 698
 699         f2fs_update_time(sbi, REQ_TIME);
 700         return err;
 701 }