fs/f2fs/inline.c

   1 /*
   2  * fs/f2fs/inline.c
   3  * Copyright (c) 2013, Intel Corporation
   4  * Authors: Huajun Li <huajun.li@intel.com>
   5  *          Haicheng Li <haicheng.li@intel.com>
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/fs.h>
  12 #include <linux/f2fs_fs.h>
  13
  14 #include "f2fs.h"
  15 #include "node.h"
  16
  17 bool f2fs_may_inline_data(struct inode *inode)
  18 {
  19         if (f2fs_is_atomic_file(inode))
  20                 return false;
  21
  22         if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))
  23                 return false;
  24
  25         if (i_size_read(inode) > MAX_INLINE_DATA)
  26                 return false;
  27
  28         if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
  29                 return false;
  30
  31         return true;
  32 }
  33
  34 bool f2fs_may_inline_dentry(struct inode *inode)
  35 {
  36         if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY))
  37                 return false;
  38
  39         if (!S_ISDIR(inode->i_mode))
  40                 return false;
  41
  42         return true;
  43 }
  44
  45 void read_inline_data(struct page *page, struct page *ipage)
  46 {
  47         void *src_addr, *dst_addr;
  48
  49         if (PageUptodate(page))
  50                 return;
  51
  52         f2fs_bug_on(F2FS_P_SB(page), page->index);
  53
  54         zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE);
  55
  56         /* Copy the whole inline data block */
  57         src_addr = inline_data_addr(ipage);
  58         dst_addr = kmap_atomic(page);
  59         memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
  60         flush_dcache_page(page);
  61         kunmap_atomic(dst_addr);
  62         SetPageUptodate(page);
  63 }
  64
  65 bool truncate_inline_inode(struct page *ipage, u64 from)
  66 {
  67         void *addr;
  68
  69         if (from >= MAX_INLINE_DATA)
  70                 return false;
  71
  72         addr = inline_data_addr(ipage);
  73
  74         f2fs_wait_on_page_writeback(ipage, NODE, true);
  75         memset(addr + from, 0, MAX_INLINE_DATA - from);
  76
  77         return true;
  78 }
  79
  80 int f2fs_read_inline_data(struct inode *inode, struct page *page)
  81 {
  82         struct page *ipage;
  83
  84         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
  85         if (IS_ERR(ipage)) {
  86                 unlock_page(page);
  87                 return PTR_ERR(ipage);
  88         }
  89
  90         if (!f2fs_has_inline_data(inode)) {
  91                 f2fs_put_page(ipage, 1);
  92                 return -EAGAIN;
  93         }
  94
  95         if (page->index)
  96                 zero_user_segment(page, 0, PAGE_SIZE);
  97         else
  98                 read_inline_data(page, ipage);
  99
 100         SetPageUptodate(page);
 101         f2fs_put_page(ipage, 1);
 102         unlock_page(page);
 103         return 0;
 104 }
 105
 106 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
 107 {
 108         struct f2fs_io_info fio = {
 109                 .sbi = F2FS_I_SB(dn->inode),
 110                 .type = DATA,
 111                 .op = REQ_OP_WRITE,
 112                 .op_flags = WRITE_SYNC | REQ_PRIO,
 113                 .page = page,
 114                 .encrypted_page = NULL,
 115         };
 116         int dirty, err;
 117
 118         if (!f2fs_exist_data(dn->inode))
 119                 goto clear_out;
 120
 121         err = f2fs_reserve_block(dn, 0);
 122         if (err)
 123                 return err;
 124
 125         f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
 126
 127         read_inline_data(page, dn->inode_page);
 128         set_page_dirty(page);
 129
 130         /* clear dirty state */
 131         dirty = clear_page_dirty_for_io(page);
 132
 133         /* write data page to try to make data consistent */
 134         set_page_writeback(page);
 135         fio.old_blkaddr = dn->data_blkaddr;
 136         write_data_page(dn, &fio);
 137         f2fs_wait_on_page_writeback(page, DATA, true);
 138         if (dirty)
 139                 inode_dec_dirty_pages(dn->inode);
 140
 141         /* this converted inline_data should be recovered. */
 142         set_inode_flag(F2FS_I(dn->inode), FI_APPEND_WRITE);
 143
 144         /* clear inline data and flag after data writeback */
 145         truncate_inline_inode(dn->inode_page, 0);
 146         clear_inline_node(dn->inode_page);
 147 clear_out:
 148         stat_dec_inline_inode(dn->inode);
 149         f2fs_clear_inline_inode(dn->inode);
 150         sync_inode_page(dn);
 151         f2fs_put_dnode(dn);
 152         return 0;
 153 }
 154
 155 int f2fs_convert_inline_inode(struct inode *inode)
 156 {
 157         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 158         struct dnode_of_data dn;
 159         struct page *ipage, *page;
 160         int err = 0;
 161
 162         if (!f2fs_has_inline_data(inode))
 163                 return 0;
 164
 165         page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
 166         if (!page)
 167                 return -ENOMEM;
 168
 169         f2fs_lock_op(sbi);
 170
 171         ipage = get_node_page(sbi, inode->i_ino);
 172         if (IS_ERR(ipage)) {
 173                 err = PTR_ERR(ipage);
 174                 goto out;
 175         }
 176
 177         set_new_dnode(&dn, inode, ipage, ipage, 0);
 178
 179         if (f2fs_has_inline_data(inode))
 180                 err = f2fs_convert_inline_page(&dn, page);
 181
 182         f2fs_put_dnode(&dn);
 183 out:
 184         f2fs_unlock_op(sbi);
 185
 186         f2fs_put_page(page, 1);
 187
 188         f2fs_balance_fs(sbi, dn.node_changed);
 189
 190         return err;
 191 }
 192
 193 int f2fs_write_inline_data(struct inode *inode, struct page *page)
 194 {
 195         void *src_addr, *dst_addr;
 196         struct dnode_of_data dn;
 197         int err;
 198
 199         set_new_dnode(&dn, inode, NULL, NULL, 0);
 200         err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
 201         if (err)
 202                 return err;
 203
 204         if (!f2fs_has_inline_data(inode)) {
 205                 f2fs_put_dnode(&dn);
 206                 return -EAGAIN;
 207         }
 208
 209         f2fs_bug_on(F2FS_I_SB(inode), page->index);
 210
 211         f2fs_wait_on_page_writeback(dn.inode_page, NODE, true);
 212         src_addr = kmap_atomic(page);
 213         dst_addr = inline_data_addr(dn.inode_page);
 214         memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
 215         kunmap_atomic(src_addr);
 216
 217         set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE);
 218         set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
 219
 220         sync_inode_page(&dn);
 221         clear_inline_node(dn.inode_page);
 222         f2fs_put_dnode(&dn);
 223         return 0;
 224 }
 225
 226 bool recover_inline_data(struct inode *inode, struct page *npage)
 227 {
 228         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 229         struct f2fs_inode *ri = NULL;
 230         void *src_addr, *dst_addr;
 231         struct page *ipage;
 232
 233         /*
 234          * The inline_data recovery policy is as follows.
 235          * [prev.] [next] of inline_data flag
 236          *    o       o  -> recover inline_data
 237          *    o       x  -> remove inline_data, and then recover data blocks
 238          *    x       o  -> remove inline_data, and then recover inline_data
 239          *    x       x  -> recover data blocks
 240          */
 241         if (IS_INODE(npage))
 242                 ri = F2FS_INODE(npage);
 243
 244         if (f2fs_has_inline_data(inode) &&
 245                         ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 246 process_inline:
 247                 ipage = get_node_page(sbi, inode->i_ino);
 248                 f2fs_bug_on(sbi, IS_ERR(ipage));
 249
 250                 f2fs_wait_on_page_writeback(ipage, NODE, true);
 251
 252                 src_addr = inline_data_addr(npage);
 253                 dst_addr = inline_data_addr(ipage);
 254                 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
 255
 256                 set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
 257                 set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
 258
 259                 update_inode(inode, ipage);
 260                 f2fs_put_page(ipage, 1);
 261                 return true;
 262         }
 263
 264         if (f2fs_has_inline_data(inode)) {
 265                 ipage = get_node_page(sbi, inode->i_ino);
 266                 f2fs_bug_on(sbi, IS_ERR(ipage));
 267                 if (!truncate_inline_inode(ipage, 0))
 268                         return false;
 269                 f2fs_clear_inline_inode(inode);
 270                 update_inode(inode, ipage);
 271                 f2fs_put_page(ipage, 1);
 272         } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 273                 if (truncate_blocks(inode, 0, false))
 274                         return false;
 275                 goto process_inline;
 276         }
 277         return false;
 278 }
 279
 280 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
 281                         struct fscrypt_name *fname, struct page **res_page)
 282 {
 283         struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
 284         struct f2fs_inline_dentry *inline_dentry;
 285         struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
 286         struct f2fs_dir_entry *de;
 287         struct f2fs_dentry_ptr d;
 288         struct page *ipage;
 289         f2fs_hash_t namehash;
 290
 291         ipage = get_node_page(sbi, dir->i_ino);
 292         if (IS_ERR(ipage))
 293                 return NULL;
 294
 295         namehash = f2fs_dentry_hash(&name);
 296
 297         inline_dentry = inline_data_addr(ipage);
 298
 299         make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
 300         de = find_target_dentry(fname, namehash, NULL, &d);
 301         unlock_page(ipage);
 302         if (de)
 303                 *res_page = ipage;
 304         else
 305                 f2fs_put_page(ipage, 0);
 306
 307         return de;
 308 }
 309
 310 struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *dir,
 311                                                         struct page **p)
 312 {
 313         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 314         struct page *ipage;
 315         struct f2fs_dir_entry *de;
 316         struct f2fs_inline_dentry *dentry_blk;
 317
 318         ipage = get_node_page(sbi, dir->i_ino);
 319         if (IS_ERR(ipage))
 320                 return NULL;
 321
 322         dentry_blk = inline_data_addr(ipage);
 323         de = &dentry_blk->dentry[1];
 324         *p = ipage;
 325         unlock_page(ipage);
 326         return de;
 327 }
 328
 329 int make_empty_inline_dir(struct inode *inode, struct inode *parent,
 330                                                         struct page *ipage)
 331 {
 332         struct f2fs_inline_dentry *dentry_blk;
 333         struct f2fs_dentry_ptr d;
 334
 335         dentry_blk = inline_data_addr(ipage);
 336
 337         make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
 338         do_make_empty_dir(inode, parent, &d);
 339
 340         set_page_dirty(ipage);
 341
 342         /* update i_size to MAX_INLINE_DATA */
 343         if (i_size_read(inode) < MAX_INLINE_DATA) {
 344                 i_size_write(inode, MAX_INLINE_DATA);
 345                 set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR);
 346         }
 347         return 0;
 348 }
 349
 350 /*
 351  * NOTE: ipage is grabbed by caller, but if any error occurs, we should
 352  * release ipage in this function.
 353  */
 354 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
 355                                 struct f2fs_inline_dentry *inline_dentry)
 356 {
 357         struct page *page;
 358         struct dnode_of_data dn;
 359         struct f2fs_dentry_block *dentry_blk;
 360         int err;
 361
 362         page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
 363         if (!page) {
 364                 f2fs_put_page(ipage, 1);
 365                 return -ENOMEM;
 366         }
 367
 368         set_new_dnode(&dn, dir, ipage, NULL, 0);
 369         err = f2fs_reserve_block(&dn, 0);
 370         if (err)
 371                 goto out;
 372
 373         f2fs_wait_on_page_writeback(page, DATA, true);
 374         zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE);
 375
 376         dentry_blk = kmap_atomic(page);
 377
 378         /* copy data from inline dentry block to new dentry block */
 379         memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
 380                                         INLINE_DENTRY_BITMAP_SIZE);
 381         memset(dentry_blk->dentry_bitmap + INLINE_DENTRY_BITMAP_SIZE, 0,
 382                         SIZE_OF_DENTRY_BITMAP - INLINE_DENTRY_BITMAP_SIZE);
 383         /*
 384          * we do not need to zero out remainder part of dentry and filename
 385          * field, since we have used bitmap for marking the usage status of
 386          * them, besides, we can also ignore copying/zeroing reserved space
 387          * of dentry block, because them haven't been used so far.
 388          */
 389         memcpy(dentry_blk->dentry, inline_dentry->dentry,
 390                         sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
 391         memcpy(dentry_blk->filename, inline_dentry->filename,
 392                                         NR_INLINE_DENTRY * F2FS_SLOT_LEN);
 393
 394         kunmap_atomic(dentry_blk);
 395         SetPageUptodate(page);
 396         set_page_dirty(page);
 397
 398         /* clear inline dir and flag after data writeback */
 399         truncate_inline_inode(ipage, 0);
 400
 401         stat_dec_inline_dir(dir);
 402         clear_inode_flag(F2FS_I(dir), FI_INLINE_DENTRY);
 403
 404         F2FS_I(dir)->i_current_depth = 1;
 405         if (i_size_read(dir) < PAGE_SIZE) {
 406                 i_size_write(dir, PAGE_SIZE);
 407                 set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
 408         }
 409
 410         sync_inode_page(&dn);
 411 out:
 412         f2fs_put_page(page, 1);
 413         return err;
 414 }
 415
 416 static int f2fs_add_inline_entries(struct inode *dir,
 417                         struct f2fs_inline_dentry *inline_dentry)
 418 {
 419         struct f2fs_dentry_ptr d;
 420         unsigned long bit_pos = 0;
 421         int err = 0;
 422
 423         make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
 424
 425         while (bit_pos < d.max) {
 426                 struct f2fs_dir_entry *de;
 427                 struct qstr new_name;
 428                 nid_t ino;
 429                 umode_t fake_mode;
 430
 431                 if (!test_bit_le(bit_pos, d.bitmap)) {
 432                         bit_pos++;
 433                         continue;
 434                 }
 435
 436                 de = &d.dentry[bit_pos];
 437
 438                 if (unlikely(!de->name_len)) {
 439                         bit_pos++;
 440                         continue;
 441                 }
 442
 443                 new_name.name = d.filename[bit_pos];
 444                 new_name.len = de->name_len;
 445
 446                 ino = le32_to_cpu(de->ino);
 447                 fake_mode = get_de_type(de) << S_SHIFT;
 448
 449                 err = f2fs_add_regular_entry(dir, &new_name, NULL,
 450                                                         ino, fake_mode);
 451                 if (err)
 452                         goto punch_dentry_pages;
 453
 454                 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
 455         }
 456         return 0;
 457 punch_dentry_pages:
 458         truncate_inode_pages(&dir->i_data, 0);
 459         truncate_blocks(dir, 0, false);
 460         remove_dirty_inode(dir);
 461         return err;
 462 }
 463
 464 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
 465                                 struct f2fs_inline_dentry *inline_dentry)
 466 {
 467         struct f2fs_inline_dentry *backup_dentry;
 468         struct f2fs_inode_info *fi = F2FS_I(dir);
 469         int err;
 470
 471         backup_dentry = f2fs_kmalloc(sizeof(struct f2fs_inline_dentry),
 472                                                         GFP_F2FS_ZERO);
 473         if (!backup_dentry) {
 474                 f2fs_put_page(ipage, 1);
 475                 return -ENOMEM;
 476         }
 477
 478         memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA);
 479         truncate_inline_inode(ipage, 0);
 480
 481         unlock_page(ipage);
 482
 483         err = f2fs_add_inline_entries(dir, backup_dentry);
 484         if (err)
 485                 goto recover;
 486
 487         lock_page(ipage);
 488
 489         stat_dec_inline_dir(dir);
 490         clear_inode_flag(fi, FI_INLINE_DENTRY);
 491         update_inode(dir, ipage);
 492         kfree(backup_dentry);
 493         return 0;
 494 recover:
 495         lock_page(ipage);
 496         memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA);
 497         fi->i_current_depth = 0;
 498         i_size_write(dir, MAX_INLINE_DATA);
 499         update_inode(dir, ipage);
 500         f2fs_put_page(ipage, 1);
 501
 502         kfree(backup_dentry);
 503         return err;
 504 }
 505
 506 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
 507                                 struct f2fs_inline_dentry *inline_dentry)
 508 {
 509         if (!F2FS_I(dir)->i_dir_level)
 510                 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
 511         else
 512                 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
 513 }
 514
 515 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name,
 516                         struct inode *inode, nid_t ino, umode_t mode)
 517 {
 518         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 519         struct page *ipage;
 520         unsigned int bit_pos;
 521         f2fs_hash_t name_hash;
 522         size_t namelen = name->len;
 523         struct f2fs_inline_dentry *dentry_blk = NULL;
 524         struct f2fs_dentry_ptr d;
 525         int slots = GET_DENTRY_SLOTS(namelen);
 526         struct page *page = NULL;
 527         int err = 0;
 528
 529         ipage = get_node_page(sbi, dir->i_ino);
 530         if (IS_ERR(ipage))
 531                 return PTR_ERR(ipage);
 532
 533         dentry_blk = inline_data_addr(ipage);
 534         bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
 535                                                 slots, NR_INLINE_DENTRY);
 536         if (bit_pos >= NR_INLINE_DENTRY) {
 537                 err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
 538                 if (err)
 539                         return err;
 540                 err = -EAGAIN;
 541                 goto out;
 542         }
 543
 544         if (inode) {
 545                 down_write(&F2FS_I(inode)->i_sem);
 546                 page = init_inode_metadata(inode, dir, name, ipage);
 547                 if (IS_ERR(page)) {
 548                         err = PTR_ERR(page);
 549                         goto fail;
 550                 }
 551         }
 552
 553         f2fs_wait_on_page_writeback(ipage, NODE, true);
 554
 555         name_hash = f2fs_dentry_hash(name);
 556         make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
 557         f2fs_update_dentry(ino, mode, &d, name, name_hash, bit_pos);
 558
 559         set_page_dirty(ipage);
 560
 561         /* we don't need to mark_inode_dirty now */
 562         if (inode) {
 563                 F2FS_I(inode)->i_pino = dir->i_ino;
 564                 update_inode(inode, page);
 565                 f2fs_put_page(page, 1);
 566         }
 567
 568         update_parent_metadata(dir, inode, 0);
 569 fail:
 570         if (inode)
 571                 up_write(&F2FS_I(inode)->i_sem);
 572
 573         if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) {
 574                 update_inode(dir, ipage);
 575                 clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
 576         }
 577 out:
 578         f2fs_put_page(ipage, 1);
 579         return err;
 580 }
 581
 582 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
 583                                         struct inode *dir, struct inode *inode)
 584 {
 585         struct f2fs_inline_dentry *inline_dentry;
 586         int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
 587         unsigned int bit_pos;
 588         int i;
 589
 590         lock_page(page);
 591         f2fs_wait_on_page_writeback(page, NODE, true);
 592
 593         inline_dentry = inline_data_addr(page);
 594         bit_pos = dentry - inline_dentry->dentry;
 595         for (i = 0; i < slots; i++)
 596                 test_and_clear_bit_le(bit_pos + i,
 597                                 &inline_dentry->dentry_bitmap);
 598
 599         set_page_dirty(page);
 600
 601         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 602
 603         if (inode)
 604                 f2fs_drop_nlink(dir, inode, page);
 605
 606         f2fs_put_page(page, 1);
 607 }
 608
 609 bool f2fs_empty_inline_dir(struct inode *dir)
 610 {
 611         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 612         struct page *ipage;
 613         unsigned int bit_pos = 2;
 614         struct f2fs_inline_dentry *dentry_blk;
 615
 616         ipage = get_node_page(sbi, dir->i_ino);
 617         if (IS_ERR(ipage))
 618                 return false;
 619
 620         dentry_blk = inline_data_addr(ipage);
 621         bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
 622                                         NR_INLINE_DENTRY,
 623                                         bit_pos);
 624
 625         f2fs_put_page(ipage, 1);
 626
 627         if (bit_pos < NR_INLINE_DENTRY)
 628                 return false;
 629
 630         return true;
 631 }
 632
 633 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
 634                                 struct fscrypt_str *fstr)
 635 {
 636         struct inode *inode = file_inode(file);
 637         struct f2fs_inline_dentry *inline_dentry = NULL;
 638         struct page *ipage = NULL;
 639         struct f2fs_dentry_ptr d;
 640
 641         if (ctx->pos == NR_INLINE_DENTRY)
 642                 return 0;
 643
 644         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 645         if (IS_ERR(ipage))
 646                 return PTR_ERR(ipage);
 647
 648         inline_dentry = inline_data_addr(ipage);
 649
 650         make_dentry_ptr(inode, &d, (void *)inline_dentry, 2);
 651
 652         if (!f2fs_fill_dentries(ctx, &d, 0, fstr))
 653                 ctx->pos = NR_INLINE_DENTRY;
 654
 655         f2fs_put_page(ipage, 1);
 656         return 0;
 657 }
 658
 659 int f2fs_inline_data_fiemap(struct inode *inode,
 660                 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
 661 {
 662         __u64 byteaddr, ilen;
 663         __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
 664                 FIEMAP_EXTENT_LAST;
 665         struct node_info ni;
 666         struct page *ipage;
 667         int err = 0;
 668
 669         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 670         if (IS_ERR(ipage))
 671                 return PTR_ERR(ipage);
 672
 673         if (!f2fs_has_inline_data(inode)) {
 674                 err = -EAGAIN;
 675                 goto out;
 676         }
 677
 678         ilen = min_t(size_t, MAX_INLINE_DATA, i_size_read(inode));
 679         if (start >= ilen)
 680                 goto out;
 681         if (start + len < ilen)
 682                 ilen = start + len;
 683         ilen -= start;
 684
 685         get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
 686         byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
 687         byteaddr += (char *)inline_data_addr(ipage) - (char *)F2FS_INODE(ipage);
 688         err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
 689 out:
 690         f2fs_put_page(ipage, 1);
 691         return err;
 692 }