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         set_page_dirty(ipage);
  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                 .rw = WRITE_SYNC | REQ_PRIO,
 112                 .page = page,
 113                 .encrypted_page = NULL,
 114         };
 115         int dirty, err;
 116
 117         if (!f2fs_exist_data(dn->inode))
 118                 goto clear_out;
 119
 120         err = f2fs_reserve_block(dn, 0);
 121         if (err)
 122                 return err;
 123
 124         f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
 125
 126         read_inline_data(page, dn->inode_page);
 127         set_page_dirty(page);
 128
 129         /* clear dirty state */
 130         dirty = clear_page_dirty_for_io(page);
 131
 132         /* write data page to try to make data consistent */
 133         set_page_writeback(page);
 134         fio.old_blkaddr = dn->data_blkaddr;
 135         write_data_page(dn, &fio);
 136         f2fs_wait_on_page_writeback(page, DATA, true);
 137         if (dirty)
 138                 inode_dec_dirty_pages(dn->inode);
 139
 140         /* this converted inline_data should be recovered. */
 141         set_inode_flag(dn->inode, FI_APPEND_WRITE);
 142
 143         /* clear inline data and flag after data writeback */
 144         truncate_inline_inode(dn->inode_page, 0);
 145         clear_inline_node(dn->inode_page);
 146 clear_out:
 147         stat_dec_inline_inode(dn->inode);
 148         f2fs_clear_inline_inode(dn->inode);
 149         f2fs_put_dnode(dn);
 150         return 0;
 151 }
 152
 153 int f2fs_convert_inline_inode(struct inode *inode)
 154 {
 155         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 156         struct dnode_of_data dn;
 157         struct page *ipage, *page;
 158         int err = 0;
 159
 160         if (!f2fs_has_inline_data(inode))
 161                 return 0;
 162
 163         page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
 164         if (!page)
 165                 return -ENOMEM;
 166
 167         f2fs_lock_op(sbi);
 168
 169         ipage = get_node_page(sbi, inode->i_ino);
 170         if (IS_ERR(ipage)) {
 171                 err = PTR_ERR(ipage);
 172                 goto out;
 173         }
 174
 175         set_new_dnode(&dn, inode, ipage, ipage, 0);
 176
 177         if (f2fs_has_inline_data(inode))
 178                 err = f2fs_convert_inline_page(&dn, page);
 179
 180         f2fs_put_dnode(&dn);
 181 out:
 182         f2fs_unlock_op(sbi);
 183
 184         f2fs_put_page(page, 1);
 185
 186         f2fs_balance_fs(sbi, dn.node_changed);
 187
 188         return err;
 189 }
 190
 191 int f2fs_write_inline_data(struct inode *inode, struct page *page)
 192 {
 193         void *src_addr, *dst_addr;
 194         struct dnode_of_data dn;
 195         int err;
 196
 197         set_new_dnode(&dn, inode, NULL, NULL, 0);
 198         err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
 199         if (err)
 200                 return err;
 201
 202         if (!f2fs_has_inline_data(inode)) {
 203                 f2fs_put_dnode(&dn);
 204                 return -EAGAIN;
 205         }
 206
 207         f2fs_bug_on(F2FS_I_SB(inode), page->index);
 208
 209         f2fs_wait_on_page_writeback(dn.inode_page, NODE, true);
 210         src_addr = kmap_atomic(page);
 211         dst_addr = inline_data_addr(dn.inode_page);
 212         memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
 213         kunmap_atomic(src_addr);
 214         set_page_dirty(dn.inode_page);
 215
 216         set_inode_flag(inode, FI_APPEND_WRITE);
 217         set_inode_flag(inode, FI_DATA_EXIST);
 218
 219         clear_inline_node(dn.inode_page);
 220         f2fs_put_dnode(&dn);
 221         return 0;
 222 }
 223
 224 bool recover_inline_data(struct inode *inode, struct page *npage)
 225 {
 226         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 227         struct f2fs_inode *ri = NULL;
 228         void *src_addr, *dst_addr;
 229         struct page *ipage;
 230
 231         /*
 232          * The inline_data recovery policy is as follows.
 233          * [prev.] [next] of inline_data flag
 234          *    o       o  -> recover inline_data
 235          *    o       x  -> remove inline_data, and then recover data blocks
 236          *    x       o  -> remove inline_data, and then recover inline_data
 237          *    x       x  -> recover data blocks
 238          */
 239         if (IS_INODE(npage))
 240                 ri = F2FS_INODE(npage);
 241
 242         if (f2fs_has_inline_data(inode) &&
 243                         ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 244 process_inline:
 245                 ipage = get_node_page(sbi, inode->i_ino);
 246                 f2fs_bug_on(sbi, IS_ERR(ipage));
 247
 248                 f2fs_wait_on_page_writeback(ipage, NODE, true);
 249
 250                 src_addr = inline_data_addr(npage);
 251                 dst_addr = inline_data_addr(ipage);
 252                 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
 253
 254                 set_inode_flag(inode, FI_INLINE_DATA);
 255                 set_inode_flag(inode, FI_DATA_EXIST);
 256
 257                 set_page_dirty(ipage);
 258                 f2fs_put_page(ipage, 1);
 259                 return true;
 260         }
 261
 262         if (f2fs_has_inline_data(inode)) {
 263                 ipage = get_node_page(sbi, inode->i_ino);
 264                 f2fs_bug_on(sbi, IS_ERR(ipage));
 265                 if (!truncate_inline_inode(ipage, 0))
 266                         return false;
 267                 f2fs_clear_inline_inode(inode);
 268                 f2fs_put_page(ipage, 1);
 269         } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 270                 if (truncate_blocks(inode, 0, false))
 271                         return false;
 272                 goto process_inline;
 273         }
 274         return false;
 275 }
 276
 277 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
 278                         struct fscrypt_name *fname, struct page **res_page)
 279 {
 280         struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
 281         struct f2fs_inline_dentry *inline_dentry;
 282         struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
 283         struct f2fs_dir_entry *de;
 284         struct f2fs_dentry_ptr d;
 285         struct page *ipage;
 286         f2fs_hash_t namehash;
 287
 288         ipage = get_node_page(sbi, dir->i_ino);
 289         if (IS_ERR(ipage)) {
 290                 *res_page = ipage;
 291                 return NULL;
 292         }
 293
 294         namehash = f2fs_dentry_hash(&name);
 295
 296         inline_dentry = inline_data_addr(ipage);
 297
 298         make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
 299         de = find_target_dentry(fname, namehash, NULL, &d);
 300         unlock_page(ipage);
 301         if (de)
 302                 *res_page = ipage;
 303         else
 304                 f2fs_put_page(ipage, 0);
 305
 306         return de;
 307 }
 308
 309 int make_empty_inline_dir(struct inode *inode, struct inode *parent,
 310                                                         struct page *ipage)
 311 {
 312         struct f2fs_inline_dentry *dentry_blk;
 313         struct f2fs_dentry_ptr d;
 314
 315         dentry_blk = inline_data_addr(ipage);
 316
 317         make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
 318         do_make_empty_dir(inode, parent, &d);
 319
 320         set_page_dirty(ipage);
 321
 322         /* update i_size to MAX_INLINE_DATA */
 323         if (i_size_read(inode) < MAX_INLINE_DATA)
 324                 f2fs_i_size_write(inode, MAX_INLINE_DATA);
 325         return 0;
 326 }
 327
 328 /*
 329  * NOTE: ipage is grabbed by caller, but if any error occurs, we should
 330  * release ipage in this function.
 331  */
 332 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
 333                                 struct f2fs_inline_dentry *inline_dentry)
 334 {
 335         struct page *page;
 336         struct dnode_of_data dn;
 337         struct f2fs_dentry_block *dentry_blk;
 338         int err;
 339
 340         page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
 341         if (!page) {
 342                 f2fs_put_page(ipage, 1);
 343                 return -ENOMEM;
 344         }
 345
 346         set_new_dnode(&dn, dir, ipage, NULL, 0);
 347         err = f2fs_reserve_block(&dn, 0);
 348         if (err)
 349                 goto out;
 350
 351         f2fs_wait_on_page_writeback(page, DATA, true);
 352         zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE);
 353
 354         dentry_blk = kmap_atomic(page);
 355
 356         /* copy data from inline dentry block to new dentry block */
 357         memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
 358                                         INLINE_DENTRY_BITMAP_SIZE);
 359         memset(dentry_blk->dentry_bitmap + INLINE_DENTRY_BITMAP_SIZE, 0,
 360                         SIZE_OF_DENTRY_BITMAP - INLINE_DENTRY_BITMAP_SIZE);
 361         /*
 362          * we do not need to zero out remainder part of dentry and filename
 363          * field, since we have used bitmap for marking the usage status of
 364          * them, besides, we can also ignore copying/zeroing reserved space
 365          * of dentry block, because them haven't been used so far.
 366          */
 367         memcpy(dentry_blk->dentry, inline_dentry->dentry,
 368                         sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
 369         memcpy(dentry_blk->filename, inline_dentry->filename,
 370                                         NR_INLINE_DENTRY * F2FS_SLOT_LEN);
 371
 372         kunmap_atomic(dentry_blk);
 373         SetPageUptodate(page);
 374         set_page_dirty(page);
 375
 376         /* clear inline dir and flag after data writeback */
 377         truncate_inline_inode(ipage, 0);
 378
 379         stat_dec_inline_dir(dir);
 380         clear_inode_flag(dir, FI_INLINE_DENTRY);
 381
 382         f2fs_i_depth_write(dir, 1);
 383         if (i_size_read(dir) < PAGE_SIZE)
 384                 f2fs_i_size_write(dir, PAGE_SIZE);
 385 out:
 386         f2fs_put_page(page, 1);
 387         return err;
 388 }
 389
 390 static int f2fs_add_inline_entries(struct inode *dir,
 391                         struct f2fs_inline_dentry *inline_dentry)
 392 {
 393         struct f2fs_dentry_ptr d;
 394         unsigned long bit_pos = 0;
 395         int err = 0;
 396
 397         make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
 398
 399         while (bit_pos < d.max) {
 400                 struct f2fs_dir_entry *de;
 401                 struct qstr new_name;
 402                 nid_t ino;
 403                 umode_t fake_mode;
 404
 405                 if (!test_bit_le(bit_pos, d.bitmap)) {
 406                         bit_pos++;
 407                         continue;
 408                 }
 409
 410                 de = &d.dentry[bit_pos];
 411
 412                 if (unlikely(!de->name_len)) {
 413                         bit_pos++;
 414                         continue;
 415                 }
 416
 417                 new_name.name = d.filename[bit_pos];
 418                 new_name.len = de->name_len;
 419
 420                 ino = le32_to_cpu(de->ino);
 421                 fake_mode = get_de_type(de) << S_SHIFT;
 422
 423                 err = f2fs_add_regular_entry(dir, &new_name, NULL,
 424                                                         ino, fake_mode);
 425                 if (err)
 426                         goto punch_dentry_pages;
 427
 428                 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
 429         }
 430         return 0;
 431 punch_dentry_pages:
 432         truncate_inode_pages(&dir->i_data, 0);
 433         truncate_blocks(dir, 0, false);
 434         remove_dirty_inode(dir);
 435         return err;
 436 }
 437
 438 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
 439                                 struct f2fs_inline_dentry *inline_dentry)
 440 {
 441         struct f2fs_inline_dentry *backup_dentry;
 442         int err;
 443
 444         backup_dentry = f2fs_kmalloc(sizeof(struct f2fs_inline_dentry),
 445                                                         GFP_F2FS_ZERO);
 446         if (!backup_dentry) {
 447                 f2fs_put_page(ipage, 1);
 448                 return -ENOMEM;
 449         }
 450
 451         memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA);
 452         truncate_inline_inode(ipage, 0);
 453
 454         unlock_page(ipage);
 455
 456         err = f2fs_add_inline_entries(dir, backup_dentry);
 457         if (err)
 458                 goto recover;
 459
 460         lock_page(ipage);
 461
 462         stat_dec_inline_dir(dir);
 463         clear_inode_flag(dir, FI_INLINE_DENTRY);
 464         kfree(backup_dentry);
 465         return 0;
 466 recover:
 467         lock_page(ipage);
 468         memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA);
 469         f2fs_i_depth_write(dir, 0);
 470         f2fs_i_size_write(dir, MAX_INLINE_DATA);
 471         set_page_dirty(ipage);
 472         f2fs_put_page(ipage, 1);
 473
 474         kfree(backup_dentry);
 475         return err;
 476 }
 477
 478 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
 479                                 struct f2fs_inline_dentry *inline_dentry)
 480 {
 481         if (!F2FS_I(dir)->i_dir_level)
 482                 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
 483         else
 484                 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
 485 }
 486
 487 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name,
 488                         struct inode *inode, nid_t ino, umode_t mode)
 489 {
 490         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 491         struct page *ipage;
 492         unsigned int bit_pos;
 493         f2fs_hash_t name_hash;
 494         size_t namelen = name->len;
 495         struct f2fs_inline_dentry *dentry_blk = NULL;
 496         struct f2fs_dentry_ptr d;
 497         int slots = GET_DENTRY_SLOTS(namelen);
 498         struct page *page = NULL;
 499         int err = 0;
 500
 501         ipage = get_node_page(sbi, dir->i_ino);
 502         if (IS_ERR(ipage))
 503                 return PTR_ERR(ipage);
 504
 505         dentry_blk = inline_data_addr(ipage);
 506         bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
 507                                                 slots, NR_INLINE_DENTRY);
 508         if (bit_pos >= NR_INLINE_DENTRY) {
 509                 err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
 510                 if (err)
 511                         return err;
 512                 err = -EAGAIN;
 513                 goto out;
 514         }
 515
 516         if (inode) {
 517                 down_write(&F2FS_I(inode)->i_sem);
 518                 page = init_inode_metadata(inode, dir, name, ipage);
 519                 if (IS_ERR(page)) {
 520                         err = PTR_ERR(page);
 521                         goto fail;
 522                 }
 523         }
 524
 525         f2fs_wait_on_page_writeback(ipage, NODE, true);
 526
 527         name_hash = f2fs_dentry_hash(name);
 528         make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
 529         f2fs_update_dentry(ino, mode, &d, name, name_hash, bit_pos);
 530
 531         set_page_dirty(ipage);
 532
 533         /* we don't need to mark_inode_dirty now */
 534         if (inode) {
 535                 f2fs_i_pino_write(inode, dir->i_ino);
 536                 f2fs_put_page(page, 1);
 537         }
 538
 539         update_parent_metadata(dir, inode, 0);
 540 fail:
 541         if (inode)
 542                 up_write(&F2FS_I(inode)->i_sem);
 543 out:
 544         f2fs_put_page(ipage, 1);
 545         return err;
 546 }
 547
 548 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
 549                                         struct inode *dir, struct inode *inode)
 550 {
 551         struct f2fs_inline_dentry *inline_dentry;
 552         int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
 553         unsigned int bit_pos;
 554         int i;
 555
 556         lock_page(page);
 557         f2fs_wait_on_page_writeback(page, NODE, true);
 558
 559         inline_dentry = inline_data_addr(page);
 560         bit_pos = dentry - inline_dentry->dentry;
 561         for (i = 0; i < slots; i++)
 562                 test_and_clear_bit_le(bit_pos + i,
 563                                 &inline_dentry->dentry_bitmap);
 564
 565         set_page_dirty(page);
 566         f2fs_put_page(page, 1);
 567
 568         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 569         mark_inode_dirty_sync(dir);
 570
 571         if (inode)
 572                 f2fs_drop_nlink(dir, inode);
 573 }
 574
 575 bool f2fs_empty_inline_dir(struct inode *dir)
 576 {
 577         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 578         struct page *ipage;
 579         unsigned int bit_pos = 2;
 580         struct f2fs_inline_dentry *dentry_blk;
 581
 582         ipage = get_node_page(sbi, dir->i_ino);
 583         if (IS_ERR(ipage))
 584                 return false;
 585
 586         dentry_blk = inline_data_addr(ipage);
 587         bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
 588                                         NR_INLINE_DENTRY,
 589                                         bit_pos);
 590
 591         f2fs_put_page(ipage, 1);
 592
 593         if (bit_pos < NR_INLINE_DENTRY)
 594                 return false;
 595
 596         return true;
 597 }
 598
 599 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
 600                                 struct fscrypt_str *fstr)
 601 {
 602         struct inode *inode = file_inode(file);
 603         struct f2fs_inline_dentry *inline_dentry = NULL;
 604         struct page *ipage = NULL;
 605         struct f2fs_dentry_ptr d;
 606
 607         if (ctx->pos == NR_INLINE_DENTRY)
 608                 return 0;
 609
 610         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 611         if (IS_ERR(ipage))
 612                 return PTR_ERR(ipage);
 613
 614         inline_dentry = inline_data_addr(ipage);
 615
 616         make_dentry_ptr(inode, &d, (void *)inline_dentry, 2);
 617
 618         if (!f2fs_fill_dentries(ctx, &d, 0, fstr))
 619                 ctx->pos = NR_INLINE_DENTRY;
 620
 621         f2fs_put_page(ipage, 1);
 622         return 0;
 623 }
 624
 625 int f2fs_inline_data_fiemap(struct inode *inode,
 626                 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
 627 {
 628         __u64 byteaddr, ilen;
 629         __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
 630                 FIEMAP_EXTENT_LAST;
 631         struct node_info ni;
 632         struct page *ipage;
 633         int err = 0;
 634
 635         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 636         if (IS_ERR(ipage))
 637                 return PTR_ERR(ipage);
 638
 639         if (!f2fs_has_inline_data(inode)) {
 640                 err = -EAGAIN;
 641                 goto out;
 642         }
 643
 644         ilen = min_t(size_t, MAX_INLINE_DATA, i_size_read(inode));
 645         if (start >= ilen)
 646                 goto out;
 647         if (start + len < ilen)
 648                 ilen = start + len;
 649         ilen -= start;
 650
 651         get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
 652         byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
 653         byteaddr += (char *)inline_data_addr(ipage) - (char *)F2FS_INODE(ipage);
 654         err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
 655 out:
 656         f2fs_put_page(ipage, 1);
 657         return err;
 658 }