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         if (!PageUptodate(page))
  63                 SetPageUptodate(page);
  64 }
  65
  66 bool truncate_inline_inode(struct page *ipage, u64 from)
  67 {
  68         void *addr;
  69
  70         if (from >= MAX_INLINE_DATA)
  71                 return false;
  72
  73         addr = inline_data_addr(ipage);
  74
  75         f2fs_wait_on_page_writeback(ipage, NODE, true);
  76         memset(addr + from, 0, MAX_INLINE_DATA - from);
  77         set_page_dirty(ipage);
  78         return true;
  79 }
  80
  81 int f2fs_read_inline_data(struct inode *inode, struct page *page)
  82 {
  83         struct page *ipage;
  84
  85         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
  86         if (IS_ERR(ipage)) {
  87                 unlock_page(page);
  88                 return PTR_ERR(ipage);
  89         }
  90
  91         if (!f2fs_has_inline_data(inode)) {
  92                 f2fs_put_page(ipage, 1);
  93                 return -EAGAIN;
  94         }
  95
  96         if (page->index)
  97                 zero_user_segment(page, 0, PAGE_SIZE);
  98         else
  99                 read_inline_data(page, ipage);
 100
 101         if (!PageUptodate(page))
 102                 SetPageUptodate(page);
 103         f2fs_put_page(ipage, 1);
 104         unlock_page(page);
 105         return 0;
 106 }
 107
 108 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
 109 {
 110         struct f2fs_io_info fio = {
 111                 .sbi = F2FS_I_SB(dn->inode),
 112                 .type = DATA,
 113                 .op = REQ_OP_WRITE,
 114                 .op_flags = WRITE_SYNC | REQ_PRIO,
 115                 .page = page,
 116                 .encrypted_page = NULL,
 117         };
 118         int dirty, err;
 119
 120         if (!f2fs_exist_data(dn->inode))
 121                 goto clear_out;
 122
 123         err = f2fs_reserve_block(dn, 0);
 124         if (err)
 125                 return err;
 126
 127         if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
 128                 f2fs_put_dnode(dn);
 129                 set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
 130                 f2fs_msg(fio.sbi->sb, KERN_WARNING,
 131                         "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
 132                         "run fsck to fix.",
 133                         __func__, dn->inode->i_ino, dn->data_blkaddr);
 134                 return -EINVAL;
 135         }
 136
 137         f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
 138
 139         read_inline_data(page, dn->inode_page);
 140         set_page_dirty(page);
 141
 142         /* clear dirty state */
 143         dirty = clear_page_dirty_for_io(page);
 144
 145         /* write data page to try to make data consistent */
 146         set_page_writeback(page);
 147         fio.old_blkaddr = dn->data_blkaddr;
 148         write_data_page(dn, &fio);
 149         f2fs_wait_on_page_writeback(page, DATA, true);
 150         if (dirty)
 151                 inode_dec_dirty_pages(dn->inode);
 152
 153         /* this converted inline_data should be recovered. */
 154         set_inode_flag(dn->inode, FI_APPEND_WRITE);
 155
 156         /* clear inline data and flag after data writeback */
 157         truncate_inline_inode(dn->inode_page, 0);
 158         clear_inline_node(dn->inode_page);
 159 clear_out:
 160         stat_dec_inline_inode(dn->inode);
 161         f2fs_clear_inline_inode(dn->inode);
 162         f2fs_put_dnode(dn);
 163         return 0;
 164 }
 165
 166 int f2fs_convert_inline_inode(struct inode *inode)
 167 {
 168         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 169         struct dnode_of_data dn;
 170         struct page *ipage, *page;
 171         int err = 0;
 172
 173         if (!f2fs_has_inline_data(inode))
 174                 return 0;
 175
 176         page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
 177         if (!page)
 178                 return -ENOMEM;
 179
 180         f2fs_lock_op(sbi);
 181
 182         ipage = get_node_page(sbi, inode->i_ino);
 183         if (IS_ERR(ipage)) {
 184                 err = PTR_ERR(ipage);
 185                 goto out;
 186         }
 187
 188         set_new_dnode(&dn, inode, ipage, ipage, 0);
 189
 190         if (f2fs_has_inline_data(inode))
 191                 err = f2fs_convert_inline_page(&dn, page);
 192
 193         f2fs_put_dnode(&dn);
 194 out:
 195         f2fs_unlock_op(sbi);
 196
 197         f2fs_put_page(page, 1);
 198
 199         f2fs_balance_fs(sbi, dn.node_changed);
 200
 201         return err;
 202 }
 203
 204 int f2fs_write_inline_data(struct inode *inode, struct page *page)
 205 {
 206         void *src_addr, *dst_addr;
 207         struct dnode_of_data dn;
 208         int err;
 209
 210         set_new_dnode(&dn, inode, NULL, NULL, 0);
 211         err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
 212         if (err)
 213                 return err;
 214
 215         if (!f2fs_has_inline_data(inode)) {
 216                 f2fs_put_dnode(&dn);
 217                 return -EAGAIN;
 218         }
 219
 220         f2fs_bug_on(F2FS_I_SB(inode), page->index);
 221
 222         f2fs_wait_on_page_writeback(dn.inode_page, NODE, true);
 223         src_addr = kmap_atomic(page);
 224         dst_addr = inline_data_addr(dn.inode_page);
 225         memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
 226         kunmap_atomic(src_addr);
 227         set_page_dirty(dn.inode_page);
 228
 229         set_inode_flag(inode, FI_APPEND_WRITE);
 230         set_inode_flag(inode, FI_DATA_EXIST);
 231
 232         clear_inline_node(dn.inode_page);
 233         f2fs_put_dnode(&dn);
 234         return 0;
 235 }
 236
 237 bool recover_inline_data(struct inode *inode, struct page *npage)
 238 {
 239         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 240         struct f2fs_inode *ri = NULL;
 241         void *src_addr, *dst_addr;
 242         struct page *ipage;
 243
 244         /*
 245          * The inline_data recovery policy is as follows.
 246          * [prev.] [next] of inline_data flag
 247          *    o       o  -> recover inline_data
 248          *    o       x  -> remove inline_data, and then recover data blocks
 249          *    x       o  -> remove inline_data, and then recover inline_data
 250          *    x       x  -> recover data blocks
 251          */
 252         if (IS_INODE(npage))
 253                 ri = F2FS_INODE(npage);
 254
 255         if (f2fs_has_inline_data(inode) &&
 256                         ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 257 process_inline:
 258                 ipage = get_node_page(sbi, inode->i_ino);
 259                 f2fs_bug_on(sbi, IS_ERR(ipage));
 260
 261                 f2fs_wait_on_page_writeback(ipage, NODE, true);
 262
 263                 src_addr = inline_data_addr(npage);
 264                 dst_addr = inline_data_addr(ipage);
 265                 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
 266
 267                 set_inode_flag(inode, FI_INLINE_DATA);
 268                 set_inode_flag(inode, FI_DATA_EXIST);
 269
 270                 set_page_dirty(ipage);
 271                 f2fs_put_page(ipage, 1);
 272                 return true;
 273         }
 274
 275         if (f2fs_has_inline_data(inode)) {
 276                 ipage = get_node_page(sbi, inode->i_ino);
 277                 f2fs_bug_on(sbi, IS_ERR(ipage));
 278                 if (!truncate_inline_inode(ipage, 0))
 279                         return false;
 280                 f2fs_clear_inline_inode(inode);
 281                 f2fs_put_page(ipage, 1);
 282         } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 283                 if (truncate_blocks(inode, 0, false))
 284                         return false;
 285                 goto process_inline;
 286         }
 287         return false;
 288 }
 289
 290 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
 291                         struct fscrypt_name *fname, struct page **res_page)
 292 {
 293         struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
 294         struct f2fs_inline_dentry *inline_dentry;
 295         struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
 296         struct f2fs_dir_entry *de;
 297         struct f2fs_dentry_ptr d;
 298         struct page *ipage;
 299         f2fs_hash_t namehash;
 300
 301         ipage = get_node_page(sbi, dir->i_ino);
 302         if (IS_ERR(ipage)) {
 303                 *res_page = ipage;
 304                 return NULL;
 305         }
 306
 307         namehash = f2fs_dentry_hash(&name, fname);
 308
 309         inline_dentry = inline_data_addr(ipage);
 310
 311         make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
 312         de = find_target_dentry(fname, namehash, NULL, &d);
 313         unlock_page(ipage);
 314         if (de)
 315                 *res_page = ipage;
 316         else
 317                 f2fs_put_page(ipage, 0);
 318
 319         return de;
 320 }
 321
 322 int make_empty_inline_dir(struct inode *inode, struct inode *parent,
 323                                                         struct page *ipage)
 324 {
 325         struct f2fs_inline_dentry *dentry_blk;
 326         struct f2fs_dentry_ptr d;
 327
 328         dentry_blk = inline_data_addr(ipage);
 329
 330         make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
 331         do_make_empty_dir(inode, parent, &d);
 332
 333         set_page_dirty(ipage);
 334
 335         /* update i_size to MAX_INLINE_DATA */
 336         if (i_size_read(inode) < MAX_INLINE_DATA)
 337                 f2fs_i_size_write(inode, MAX_INLINE_DATA);
 338         return 0;
 339 }
 340
 341 /*
 342  * NOTE: ipage is grabbed by caller, but if any error occurs, we should
 343  * release ipage in this function.
 344  */
 345 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
 346                                 struct f2fs_inline_dentry *inline_dentry)
 347 {
 348         struct page *page;
 349         struct dnode_of_data dn;
 350         struct f2fs_dentry_block *dentry_blk;
 351         int err;
 352
 353         page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
 354         if (!page) {
 355                 f2fs_put_page(ipage, 1);
 356                 return -ENOMEM;
 357         }
 358
 359         set_new_dnode(&dn, dir, ipage, NULL, 0);
 360         err = f2fs_reserve_block(&dn, 0);
 361         if (err)
 362                 goto out;
 363
 364         if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
 365                 f2fs_put_dnode(&dn);
 366                 set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
 367                 f2fs_msg(F2FS_P_SB(page)->sb, KERN_WARNING,
 368                         "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
 369                         "run fsck to fix.",
 370                         __func__, dir->i_ino, dn.data_blkaddr);
 371                 err = -EINVAL;
 372                 goto out;
 373         }
 374
 375         f2fs_wait_on_page_writeback(page, DATA, true);
 376         zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE);
 377
 378         dentry_blk = kmap_atomic(page);
 379
 380         /* copy data from inline dentry block to new dentry block */
 381         memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
 382                                         INLINE_DENTRY_BITMAP_SIZE);
 383         memset(dentry_blk->dentry_bitmap + INLINE_DENTRY_BITMAP_SIZE, 0,
 384                         SIZE_OF_DENTRY_BITMAP - INLINE_DENTRY_BITMAP_SIZE);
 385         /*
 386          * we do not need to zero out remainder part of dentry and filename
 387          * field, since we have used bitmap for marking the usage status of
 388          * them, besides, we can also ignore copying/zeroing reserved space
 389          * of dentry block, because them haven't been used so far.
 390          */
 391         memcpy(dentry_blk->dentry, inline_dentry->dentry,
 392                         sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
 393         memcpy(dentry_blk->filename, inline_dentry->filename,
 394                                         NR_INLINE_DENTRY * F2FS_SLOT_LEN);
 395
 396         kunmap_atomic(dentry_blk);
 397         if (!PageUptodate(page))
 398                 SetPageUptodate(page);
 399         set_page_dirty(page);
 400
 401         /* clear inline dir and flag after data writeback */
 402         truncate_inline_inode(ipage, 0);
 403
 404         stat_dec_inline_dir(dir);
 405         clear_inode_flag(dir, FI_INLINE_DENTRY);
 406
 407         f2fs_i_depth_write(dir, 1);
 408         if (i_size_read(dir) < PAGE_SIZE)
 409                 f2fs_i_size_write(dir, PAGE_SIZE);
 410 out:
 411         f2fs_put_page(page, 1);
 412         return err;
 413 }
 414
 415 static int f2fs_add_inline_entries(struct inode *dir,
 416                         struct f2fs_inline_dentry *inline_dentry)
 417 {
 418         struct f2fs_dentry_ptr d;
 419         unsigned long bit_pos = 0;
 420         int err = 0;
 421
 422         make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
 423
 424         while (bit_pos < d.max) {
 425                 struct f2fs_dir_entry *de;
 426                 struct qstr new_name;
 427                 nid_t ino;
 428                 umode_t fake_mode;
 429
 430                 if (!test_bit_le(bit_pos, d.bitmap)) {
 431                         bit_pos++;
 432                         continue;
 433                 }
 434
 435                 de = &d.dentry[bit_pos];
 436
 437                 if (unlikely(!de->name_len)) {
 438                         bit_pos++;
 439                         continue;
 440                 }
 441
 442                 new_name.name = d.filename[bit_pos];
 443                 new_name.len = de->name_len;
 444
 445                 ino = le32_to_cpu(de->ino);
 446                 fake_mode = get_de_type(de) << S_SHIFT;
 447
 448                 err = f2fs_add_regular_entry(dir, &new_name, NULL, NULL,
 449                                                         ino, fake_mode);
 450                 if (err)
 451                         goto punch_dentry_pages;
 452
 453                 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
 454         }
 455         return 0;
 456 punch_dentry_pages:
 457         truncate_inode_pages(&dir->i_data, 0);
 458         truncate_blocks(dir, 0, false);
 459         remove_dirty_inode(dir);
 460         return err;
 461 }
 462
 463 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
 464                                 struct f2fs_inline_dentry *inline_dentry)
 465 {
 466         struct f2fs_inline_dentry *backup_dentry;
 467         int err;
 468
 469         backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
 470                         sizeof(struct f2fs_inline_dentry), GFP_F2FS_ZERO);
 471         if (!backup_dentry) {
 472                 f2fs_put_page(ipage, 1);
 473                 return -ENOMEM;
 474         }
 475
 476         memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA);
 477         truncate_inline_inode(ipage, 0);
 478
 479         unlock_page(ipage);
 480
 481         err = f2fs_add_inline_entries(dir, backup_dentry);
 482         if (err)
 483                 goto recover;
 484
 485         lock_page(ipage);
 486
 487         stat_dec_inline_dir(dir);
 488         clear_inode_flag(dir, FI_INLINE_DENTRY);
 489         kfree(backup_dentry);
 490         return 0;
 491 recover:
 492         lock_page(ipage);
 493         memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA);
 494         f2fs_i_depth_write(dir, 0);
 495         f2fs_i_size_write(dir, MAX_INLINE_DATA);
 496         set_page_dirty(ipage);
 497         f2fs_put_page(ipage, 1);
 498
 499         kfree(backup_dentry);
 500         return err;
 501 }
 502
 503 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
 504                                 struct f2fs_inline_dentry *inline_dentry)
 505 {
 506         if (!F2FS_I(dir)->i_dir_level)
 507                 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
 508         else
 509                 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
 510 }
 511
 512 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
 513                                 const struct qstr *orig_name,
 514                                 struct inode *inode, nid_t ino, umode_t mode)
 515 {
 516         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 517         struct page *ipage;
 518         unsigned int bit_pos;
 519         f2fs_hash_t name_hash;
 520         struct f2fs_inline_dentry *dentry_blk = NULL;
 521         struct f2fs_dentry_ptr d;
 522         int slots = GET_DENTRY_SLOTS(new_name->len);
 523         struct page *page = NULL;
 524         int err = 0;
 525
 526         ipage = get_node_page(sbi, dir->i_ino);
 527         if (IS_ERR(ipage))
 528                 return PTR_ERR(ipage);
 529
 530         dentry_blk = inline_data_addr(ipage);
 531         bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
 532                                                 slots, NR_INLINE_DENTRY);
 533         if (bit_pos >= NR_INLINE_DENTRY) {
 534                 err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
 535                 if (err)
 536                         return err;
 537                 err = -EAGAIN;
 538                 goto out;
 539         }
 540
 541         if (inode) {
 542                 down_write(&F2FS_I(inode)->i_sem);
 543                 page = init_inode_metadata(inode, dir, new_name,
 544                                                 orig_name, ipage);
 545                 if (IS_ERR(page)) {
 546                         err = PTR_ERR(page);
 547                         goto fail;
 548                 }
 549                 if (f2fs_encrypted_inode(dir))
 550                         file_set_enc_name(inode);
 551         }
 552
 553         f2fs_wait_on_page_writeback(ipage, NODE, true);
 554
 555         name_hash = f2fs_dentry_hash(new_name, NULL);
 556         make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
 557         f2fs_update_dentry(ino, mode, &d, new_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_pino_write(inode, dir->i_ino);
 564                 f2fs_put_page(page, 1);
 565         }
 566
 567         update_parent_metadata(dir, inode, 0);
 568 fail:
 569         if (inode)
 570                 up_write(&F2FS_I(inode)->i_sem);
 571 out:
 572         f2fs_put_page(ipage, 1);
 573         return err;
 574 }
 575
 576 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
 577                                         struct inode *dir, struct inode *inode)
 578 {
 579         struct f2fs_inline_dentry *inline_dentry;
 580         int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
 581         unsigned int bit_pos;
 582         int i;
 583
 584         lock_page(page);
 585         f2fs_wait_on_page_writeback(page, NODE, true);
 586
 587         inline_dentry = inline_data_addr(page);
 588         bit_pos = dentry - inline_dentry->dentry;
 589         for (i = 0; i < slots; i++)
 590                 __clear_bit_le(bit_pos + i,
 591                                 &inline_dentry->dentry_bitmap);
 592
 593         set_page_dirty(page);
 594         f2fs_put_page(page, 1);
 595
 596         dir->i_ctime = dir->i_mtime = current_time(dir);
 597         f2fs_mark_inode_dirty_sync(dir);
 598
 599         if (inode)
 600                 f2fs_drop_nlink(dir, inode);
 601 }
 602
 603 bool f2fs_empty_inline_dir(struct inode *dir)
 604 {
 605         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 606         struct page *ipage;
 607         unsigned int bit_pos = 2;
 608         struct f2fs_inline_dentry *dentry_blk;
 609
 610         ipage = get_node_page(sbi, dir->i_ino);
 611         if (IS_ERR(ipage))
 612                 return false;
 613
 614         dentry_blk = inline_data_addr(ipage);
 615         bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
 616                                         NR_INLINE_DENTRY,
 617                                         bit_pos);
 618
 619         f2fs_put_page(ipage, 1);
 620
 621         if (bit_pos < NR_INLINE_DENTRY)
 622                 return false;
 623
 624         return true;
 625 }
 626
 627 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
 628                                 struct fscrypt_str *fstr)
 629 {
 630         struct inode *inode = file_inode(file);
 631         struct f2fs_inline_dentry *inline_dentry = NULL;
 632         struct page *ipage = NULL;
 633         struct f2fs_dentry_ptr d;
 634
 635         if (ctx->pos == NR_INLINE_DENTRY)
 636                 return 0;
 637
 638         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 639         if (IS_ERR(ipage))
 640                 return PTR_ERR(ipage);
 641
 642         inline_dentry = inline_data_addr(ipage);
 643
 644         make_dentry_ptr(inode, &d, (void *)inline_dentry, 2);
 645
 646         if (!f2fs_fill_dentries(ctx, &d, 0, fstr))
 647                 ctx->pos = NR_INLINE_DENTRY;
 648
 649         f2fs_put_page(ipage, 1);
 650         return 0;
 651 }
 652
 653 int f2fs_inline_data_fiemap(struct inode *inode,
 654                 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
 655 {
 656         __u64 byteaddr, ilen;
 657         __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
 658                 FIEMAP_EXTENT_LAST;
 659         struct node_info ni;
 660         struct page *ipage;
 661         int err = 0;
 662
 663         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 664         if (IS_ERR(ipage))
 665                 return PTR_ERR(ipage);
 666
 667         if (!f2fs_has_inline_data(inode)) {
 668                 err = -EAGAIN;
 669                 goto out;
 670         }
 671
 672         ilen = min_t(size_t, MAX_INLINE_DATA, i_size_read(inode));
 673         if (start >= ilen)
 674                 goto out;
 675         if (start + len < ilen)
 676                 ilen = start + len;
 677         ilen -= start;
 678
 679         get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
 680         byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
 681         byteaddr += (char *)inline_data_addr(ipage) - (char *)F2FS_INODE(ipage);
 682         err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
 683 out:
 684         f2fs_put_page(ipage, 1);
 685         return err;
 686 }