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 #include <trace/events/android_fs.h>
  17
  18 bool f2fs_may_inline_data(struct inode *inode)
  19 {
  20         if (f2fs_is_atomic_file(inode))
  21                 return false;
  22
  23         if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))
  24                 return false;
  25
  26         if (i_size_read(inode) > MAX_INLINE_DATA(inode))
  27                 return false;
  28
  29         if (f2fs_encrypted_file(inode))
  30                 return false;
  31
  32         return true;
  33 }
  34
  35 bool f2fs_may_inline_dentry(struct inode *inode)
  36 {
  37         if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY))
  38                 return false;
  39
  40         if (!S_ISDIR(inode->i_mode))
  41                 return false;
  42
  43         return true;
  44 }
  45
  46 void read_inline_data(struct page *page, struct page *ipage)
  47 {
  48         struct inode *inode = page->mapping->host;
  49         void *src_addr, *dst_addr;
  50
  51         if (PageUptodate(page))
  52                 return;
  53
  54         f2fs_bug_on(F2FS_P_SB(page), page->index);
  55
  56         zero_user_segment(page, MAX_INLINE_DATA(inode), PAGE_SIZE);
  57
  58         /* Copy the whole inline data block */
  59         src_addr = inline_data_addr(inode, ipage);
  60         dst_addr = kmap_atomic(page);
  61         memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
  62         flush_dcache_page(page);
  63         kunmap_atomic(dst_addr);
  64         if (!PageUptodate(page))
  65                 SetPageUptodate(page);
  66 }
  67
  68 void truncate_inline_inode(struct inode *inode, struct page *ipage, u64 from)
  69 {
  70         void *addr;
  71
  72         if (from >= MAX_INLINE_DATA(inode))
  73                 return;
  74
  75         addr = inline_data_addr(inode, ipage);
  76
  77         f2fs_wait_on_page_writeback(ipage, NODE, true);
  78         memset(addr + from, 0, MAX_INLINE_DATA(inode) - from);
  79         set_page_dirty(ipage);
  80
  81         if (from == 0)
  82                 clear_inode_flag(inode, FI_DATA_EXIST);
  83 }
  84
  85 int f2fs_read_inline_data(struct inode *inode, struct page *page)
  86 {
  87         struct page *ipage;
  88
  89         if (trace_android_fs_dataread_start_enabled()) {
  90                 char *path, pathbuf[MAX_TRACE_PATHBUF_LEN];
  91
  92                 path = android_fstrace_get_pathname(pathbuf,
  93                                                     MAX_TRACE_PATHBUF_LEN,
  94                                                     inode);
  95                 trace_android_fs_dataread_start(inode, page_offset(page),
  96                                                 PAGE_SIZE, current->pid,
  97                                                 path, current->comm);
  98         }
  99
 100         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 101         if (IS_ERR(ipage)) {
 102                 trace_android_fs_dataread_end(inode, page_offset(page),
 103                                               PAGE_SIZE);
 104                 unlock_page(page);
 105                 return PTR_ERR(ipage);
 106         }
 107
 108         if (!f2fs_has_inline_data(inode)) {
 109                 f2fs_put_page(ipage, 1);
 110                 trace_android_fs_dataread_end(inode, page_offset(page),
 111                                               PAGE_SIZE);
 112                 return -EAGAIN;
 113         }
 114
 115         if (page->index)
 116                 zero_user_segment(page, 0, PAGE_SIZE);
 117         else
 118                 read_inline_data(page, ipage);
 119
 120         if (!PageUptodate(page))
 121                 SetPageUptodate(page);
 122         f2fs_put_page(ipage, 1);
 123         trace_android_fs_dataread_end(inode, page_offset(page),
 124                                       PAGE_SIZE);
 125         unlock_page(page);
 126         return 0;
 127 }
 128
 129 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
 130 {
 131         struct f2fs_io_info fio = {
 132                 .sbi = F2FS_I_SB(dn->inode),
 133                 .type = DATA,
 134                 .op = REQ_OP_WRITE,
 135                 .op_flags = REQ_SYNC | REQ_NOIDLE | REQ_PRIO,
 136                 .page = page,
 137                 .encrypted_page = NULL,
 138                 .io_type = FS_DATA_IO,
 139         };
 140         int dirty, err;
 141
 142         if (!f2fs_exist_data(dn->inode))
 143                 goto clear_out;
 144
 145         err = f2fs_reserve_block(dn, 0);
 146         if (err)
 147                 return err;
 148
 149         f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
 150
 151         read_inline_data(page, dn->inode_page);
 152         set_page_dirty(page);
 153
 154         /* clear dirty state */
 155         dirty = clear_page_dirty_for_io(page);
 156
 157         /* write data page to try to make data consistent */
 158         set_page_writeback(page);
 159         fio.old_blkaddr = dn->data_blkaddr;
 160         set_inode_flag(dn->inode, FI_HOT_DATA);
 161         write_data_page(dn, &fio);
 162         f2fs_wait_on_page_writeback(page, DATA, true);
 163         if (dirty) {
 164                 inode_dec_dirty_pages(dn->inode);
 165                 remove_dirty_inode(dn->inode);
 166         }
 167
 168         /* this converted inline_data should be recovered. */
 169         set_inode_flag(dn->inode, FI_APPEND_WRITE);
 170
 171         /* clear inline data and flag after data writeback */
 172         truncate_inline_inode(dn->inode, dn->inode_page, 0);
 173         clear_inline_node(dn->inode_page);
 174 clear_out:
 175         stat_dec_inline_inode(dn->inode);
 176         clear_inode_flag(dn->inode, FI_INLINE_DATA);
 177         f2fs_put_dnode(dn);
 178         return 0;
 179 }
 180
 181 int f2fs_convert_inline_inode(struct inode *inode)
 182 {
 183         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 184         struct dnode_of_data dn;
 185         struct page *ipage, *page;
 186         int err = 0;
 187
 188         if (!f2fs_has_inline_data(inode))
 189                 return 0;
 190
 191         page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
 192         if (!page)
 193                 return -ENOMEM;
 194
 195         f2fs_lock_op(sbi);
 196
 197         ipage = get_node_page(sbi, inode->i_ino);
 198         if (IS_ERR(ipage)) {
 199                 err = PTR_ERR(ipage);
 200                 goto out;
 201         }
 202
 203         set_new_dnode(&dn, inode, ipage, ipage, 0);
 204
 205         if (f2fs_has_inline_data(inode))
 206                 err = f2fs_convert_inline_page(&dn, page);
 207
 208         f2fs_put_dnode(&dn);
 209 out:
 210         f2fs_unlock_op(sbi);
 211
 212         f2fs_put_page(page, 1);
 213
 214         f2fs_balance_fs(sbi, dn.node_changed);
 215
 216         return err;
 217 }
 218
 219 int f2fs_write_inline_data(struct inode *inode, struct page *page)
 220 {
 221         void *src_addr, *dst_addr;
 222         struct dnode_of_data dn;
 223         struct address_space *mapping = page_mapping(page);
 224         unsigned long flags;
 225         int err;
 226
 227         set_new_dnode(&dn, inode, NULL, NULL, 0);
 228         err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
 229         if (err)
 230                 return err;
 231
 232         if (!f2fs_has_inline_data(inode)) {
 233                 f2fs_put_dnode(&dn);
 234                 return -EAGAIN;
 235         }
 236
 237         f2fs_bug_on(F2FS_I_SB(inode), page->index);
 238
 239         f2fs_wait_on_page_writeback(dn.inode_page, NODE, true);
 240         src_addr = kmap_atomic(page);
 241         dst_addr = inline_data_addr(inode, dn.inode_page);
 242         memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
 243         kunmap_atomic(src_addr);
 244         set_page_dirty(dn.inode_page);
 245
 246         spin_lock_irqsave(&mapping->tree_lock, flags);
 247         radix_tree_tag_clear(&mapping->page_tree, page_index(page),
 248                              PAGECACHE_TAG_DIRTY);
 249         spin_unlock_irqrestore(&mapping->tree_lock, flags);
 250
 251         set_inode_flag(inode, FI_APPEND_WRITE);
 252         set_inode_flag(inode, FI_DATA_EXIST);
 253
 254         clear_inline_node(dn.inode_page);
 255         f2fs_put_dnode(&dn);
 256         return 0;
 257 }
 258
 259 bool recover_inline_data(struct inode *inode, struct page *npage)
 260 {
 261         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 262         struct f2fs_inode *ri = NULL;
 263         void *src_addr, *dst_addr;
 264         struct page *ipage;
 265
 266         /*
 267          * The inline_data recovery policy is as follows.
 268          * [prev.] [next] of inline_data flag
 269          *    o       o  -> recover inline_data
 270          *    o       x  -> remove inline_data, and then recover data blocks
 271          *    x       o  -> remove inline_data, and then recover inline_data
 272          *    x       x  -> recover data blocks
 273          */
 274         if (IS_INODE(npage))
 275                 ri = F2FS_INODE(npage);
 276
 277         if (f2fs_has_inline_data(inode) &&
 278                         ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 279 process_inline:
 280                 ipage = get_node_page(sbi, inode->i_ino);
 281                 f2fs_bug_on(sbi, IS_ERR(ipage));
 282
 283                 f2fs_wait_on_page_writeback(ipage, NODE, true);
 284
 285                 src_addr = inline_data_addr(inode, npage);
 286                 dst_addr = inline_data_addr(inode, ipage);
 287                 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
 288
 289                 set_inode_flag(inode, FI_INLINE_DATA);
 290                 set_inode_flag(inode, FI_DATA_EXIST);
 291
 292                 set_page_dirty(ipage);
 293                 f2fs_put_page(ipage, 1);
 294                 return true;
 295         }
 296
 297         if (f2fs_has_inline_data(inode)) {
 298                 ipage = get_node_page(sbi, inode->i_ino);
 299                 f2fs_bug_on(sbi, IS_ERR(ipage));
 300                 truncate_inline_inode(inode, ipage, 0);
 301                 clear_inode_flag(inode, FI_INLINE_DATA);
 302                 f2fs_put_page(ipage, 1);
 303         } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 304                 if (truncate_blocks(inode, 0, false))
 305                         return false;
 306                 goto process_inline;
 307         }
 308         return false;
 309 }
 310
 311 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
 312                         struct fscrypt_name *fname, struct page **res_page)
 313 {
 314         struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
 315         struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
 316         struct f2fs_dir_entry *de;
 317         struct f2fs_dentry_ptr d;
 318         struct page *ipage;
 319         void *inline_dentry;
 320         f2fs_hash_t namehash;
 321
 322         ipage = get_node_page(sbi, dir->i_ino);
 323         if (IS_ERR(ipage)) {
 324                 *res_page = ipage;
 325                 return NULL;
 326         }
 327
 328         namehash = f2fs_dentry_hash(&name, fname);
 329
 330         inline_dentry = inline_data_addr(dir, ipage);
 331
 332         make_dentry_ptr_inline(dir, &d, inline_dentry);
 333         de = find_target_dentry(fname, namehash, NULL, &d);
 334         unlock_page(ipage);
 335         if (de)
 336                 *res_page = ipage;
 337         else
 338                 f2fs_put_page(ipage, 0);
 339
 340         return de;
 341 }
 342
 343 int make_empty_inline_dir(struct inode *inode, struct inode *parent,
 344                                                         struct page *ipage)
 345 {
 346         struct f2fs_dentry_ptr d;
 347         void *inline_dentry;
 348
 349         inline_dentry = inline_data_addr(inode, ipage);
 350
 351         make_dentry_ptr_inline(inode, &d, inline_dentry);
 352         do_make_empty_dir(inode, parent, &d);
 353
 354         set_page_dirty(ipage);
 355
 356         /* update i_size to MAX_INLINE_DATA */
 357         if (i_size_read(inode) < MAX_INLINE_DATA(inode))
 358                 f2fs_i_size_write(inode, MAX_INLINE_DATA(inode));
 359         return 0;
 360 }
 361
 362 /*
 363  * NOTE: ipage is grabbed by caller, but if any error occurs, we should
 364  * release ipage in this function.
 365  */
 366 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
 367                                                         void *inline_dentry)
 368 {
 369         struct page *page;
 370         struct dnode_of_data dn;
 371         struct f2fs_dentry_block *dentry_blk;
 372         struct f2fs_dentry_ptr src, dst;
 373         int err;
 374
 375         page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
 376         if (!page) {
 377                 f2fs_put_page(ipage, 1);
 378                 return -ENOMEM;
 379         }
 380
 381         set_new_dnode(&dn, dir, ipage, NULL, 0);
 382         err = f2fs_reserve_block(&dn, 0);
 383         if (err)
 384                 goto out;
 385
 386         f2fs_wait_on_page_writeback(page, DATA, true);
 387         zero_user_segment(page, MAX_INLINE_DATA(dir), PAGE_SIZE);
 388
 389         dentry_blk = kmap_atomic(page);
 390
 391         make_dentry_ptr_inline(dir, &src, inline_dentry);
 392         make_dentry_ptr_block(dir, &dst, dentry_blk);
 393
 394         /* copy data from inline dentry block to new dentry block */
 395         memcpy(dst.bitmap, src.bitmap, src.nr_bitmap);
 396         memset(dst.bitmap + src.nr_bitmap, 0, dst.nr_bitmap - src.nr_bitmap);
 397         /*
 398          * we do not need to zero out remainder part of dentry and filename
 399          * field, since we have used bitmap for marking the usage status of
 400          * them, besides, we can also ignore copying/zeroing reserved space
 401          * of dentry block, because them haven't been used so far.
 402          */
 403         memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max);
 404         memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN);
 405
 406         kunmap_atomic(dentry_blk);
 407         if (!PageUptodate(page))
 408                 SetPageUptodate(page);
 409         set_page_dirty(page);
 410
 411         /* clear inline dir and flag after data writeback */
 412         truncate_inline_inode(dir, ipage, 0);
 413
 414         stat_dec_inline_dir(dir);
 415         clear_inode_flag(dir, FI_INLINE_DENTRY);
 416
 417         f2fs_i_depth_write(dir, 1);
 418         if (i_size_read(dir) < PAGE_SIZE)
 419                 f2fs_i_size_write(dir, PAGE_SIZE);
 420 out:
 421         f2fs_put_page(page, 1);
 422         return err;
 423 }
 424
 425 static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
 426 {
 427         struct f2fs_dentry_ptr d;
 428         unsigned long bit_pos = 0;
 429         int err = 0;
 430
 431         make_dentry_ptr_inline(dir, &d, inline_dentry);
 432
 433         while (bit_pos < d.max) {
 434                 struct f2fs_dir_entry *de;
 435                 struct qstr new_name;
 436                 nid_t ino;
 437                 umode_t fake_mode;
 438
 439                 if (!test_bit_le(bit_pos, d.bitmap)) {
 440                         bit_pos++;
 441                         continue;
 442                 }
 443
 444                 de = &d.dentry[bit_pos];
 445
 446                 if (unlikely(!de->name_len)) {
 447                         bit_pos++;
 448                         continue;
 449                 }
 450
 451                 new_name.name = d.filename[bit_pos];
 452                 new_name.len = le16_to_cpu(de->name_len);
 453
 454                 ino = le32_to_cpu(de->ino);
 455                 fake_mode = get_de_type(de) << S_SHIFT;
 456
 457                 err = f2fs_add_regular_entry(dir, &new_name, NULL, NULL,
 458                                                         ino, fake_mode);
 459                 if (err)
 460                         goto punch_dentry_pages;
 461
 462                 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
 463         }
 464         return 0;
 465 punch_dentry_pages:
 466         truncate_inode_pages(&dir->i_data, 0);
 467         truncate_blocks(dir, 0, false);
 468         remove_dirty_inode(dir);
 469         return err;
 470 }
 471
 472 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
 473                                                         void *inline_dentry)
 474 {
 475         void *backup_dentry;
 476         int err;
 477
 478         backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
 479                                 MAX_INLINE_DATA(dir), GFP_F2FS_ZERO);
 480         if (!backup_dentry) {
 481                 f2fs_put_page(ipage, 1);
 482                 return -ENOMEM;
 483         }
 484
 485         memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA(dir));
 486         truncate_inline_inode(dir, ipage, 0);
 487
 488         unlock_page(ipage);
 489
 490         err = f2fs_add_inline_entries(dir, backup_dentry);
 491         if (err)
 492                 goto recover;
 493
 494         lock_page(ipage);
 495
 496         stat_dec_inline_dir(dir);
 497         clear_inode_flag(dir, FI_INLINE_DENTRY);
 498         kfree(backup_dentry);
 499         return 0;
 500 recover:
 501         lock_page(ipage);
 502         memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
 503         f2fs_i_depth_write(dir, 0);
 504         f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));
 505         set_page_dirty(ipage);
 506         f2fs_put_page(ipage, 1);
 507
 508         kfree(backup_dentry);
 509         return err;
 510 }
 511
 512 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
 513                                                         void *inline_dentry)
 514 {
 515         if (!F2FS_I(dir)->i_dir_level)
 516                 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
 517         else
 518                 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
 519 }
 520
 521 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
 522                                 const struct qstr *orig_name,
 523                                 struct inode *inode, nid_t ino, umode_t mode)
 524 {
 525         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 526         struct page *ipage;
 527         unsigned int bit_pos;
 528         f2fs_hash_t name_hash;
 529         void *inline_dentry = NULL;
 530         struct f2fs_dentry_ptr d;
 531         int slots = GET_DENTRY_SLOTS(new_name->len);
 532         struct page *page = NULL;
 533         int err = 0;
 534
 535         ipage = get_node_page(sbi, dir->i_ino);
 536         if (IS_ERR(ipage))
 537                 return PTR_ERR(ipage);
 538
 539         inline_dentry = inline_data_addr(dir, ipage);
 540         make_dentry_ptr_inline(dir, &d, inline_dentry);
 541
 542         bit_pos = room_for_filename(d.bitmap, slots, d.max);
 543         if (bit_pos >= d.max) {
 544                 err = f2fs_convert_inline_dir(dir, ipage, inline_dentry);
 545                 if (err)
 546                         return err;
 547                 err = -EAGAIN;
 548                 goto out;
 549         }
 550
 551         if (inode) {
 552                 down_write(&F2FS_I(inode)->i_sem);
 553                 page = init_inode_metadata(inode, dir, new_name,
 554                                                 orig_name, ipage);
 555                 if (IS_ERR(page)) {
 556                         err = PTR_ERR(page);
 557                         goto fail;
 558                 }
 559         }
 560
 561         f2fs_wait_on_page_writeback(ipage, NODE, true);
 562
 563         name_hash = f2fs_dentry_hash(new_name, NULL);
 564         f2fs_update_dentry(ino, mode, &d, new_name, name_hash, bit_pos);
 565
 566         set_page_dirty(ipage);
 567
 568         /* we don't need to mark_inode_dirty now */
 569         if (inode) {
 570                 f2fs_i_pino_write(inode, dir->i_ino);
 571                 f2fs_put_page(page, 1);
 572         }
 573
 574         update_parent_metadata(dir, inode, 0);
 575 fail:
 576         if (inode)
 577                 up_write(&F2FS_I(inode)->i_sem);
 578 out:
 579         f2fs_put_page(ipage, 1);
 580         return err;
 581 }
 582
 583 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
 584                                         struct inode *dir, struct inode *inode)
 585 {
 586         struct f2fs_dentry_ptr d;
 587         void *inline_dentry;
 588         int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
 589         unsigned int bit_pos;
 590         int i;
 591
 592         lock_page(page);
 593         f2fs_wait_on_page_writeback(page, NODE, true);
 594
 595         inline_dentry = inline_data_addr(dir, page);
 596         make_dentry_ptr_inline(dir, &d, inline_dentry);
 597
 598         bit_pos = dentry - d.dentry;
 599         for (i = 0; i < slots; i++)
 600                 __clear_bit_le(bit_pos + i, d.bitmap);
 601
 602         set_page_dirty(page);
 603         f2fs_put_page(page, 1);
 604
 605         dir->i_ctime = dir->i_mtime = current_time(dir);
 606         f2fs_mark_inode_dirty_sync(dir, false);
 607
 608         if (inode)
 609                 f2fs_drop_nlink(dir, inode);
 610 }
 611
 612 bool f2fs_empty_inline_dir(struct inode *dir)
 613 {
 614         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 615         struct page *ipage;
 616         unsigned int bit_pos = 2;
 617         void *inline_dentry;
 618         struct f2fs_dentry_ptr d;
 619
 620         ipage = get_node_page(sbi, dir->i_ino);
 621         if (IS_ERR(ipage))
 622                 return false;
 623
 624         inline_dentry = inline_data_addr(dir, ipage);
 625         make_dentry_ptr_inline(dir, &d, inline_dentry);
 626
 627         bit_pos = find_next_bit_le(d.bitmap, d.max, bit_pos);
 628
 629         f2fs_put_page(ipage, 1);
 630
 631         if (bit_pos < d.max)
 632                 return false;
 633
 634         return true;
 635 }
 636
 637 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
 638                                 struct fscrypt_str *fstr)
 639 {
 640         struct inode *inode = file_inode(file);
 641         struct page *ipage = NULL;
 642         struct f2fs_dentry_ptr d;
 643         void *inline_dentry = NULL;
 644         int err;
 645
 646         make_dentry_ptr_inline(inode, &d, inline_dentry);
 647
 648         if (ctx->pos == d.max)
 649                 return 0;
 650
 651         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 652         if (IS_ERR(ipage))
 653                 return PTR_ERR(ipage);
 654
 655         inline_dentry = inline_data_addr(inode, ipage);
 656
 657         make_dentry_ptr_inline(inode, &d, inline_dentry);
 658
 659         err = f2fs_fill_dentries(ctx, &d, 0, fstr);
 660         if (!err)
 661                 ctx->pos = d.max;
 662
 663         f2fs_put_page(ipage, 1);
 664         return err < 0 ? err : 0;
 665 }
 666
 667 int f2fs_inline_data_fiemap(struct inode *inode,
 668                 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
 669 {
 670         __u64 byteaddr, ilen;
 671         __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
 672                 FIEMAP_EXTENT_LAST;
 673         struct node_info ni;
 674         struct page *ipage;
 675         int err = 0;
 676
 677         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 678         if (IS_ERR(ipage))
 679                 return PTR_ERR(ipage);
 680
 681         if (!f2fs_has_inline_data(inode)) {
 682                 err = -EAGAIN;
 683                 goto out;
 684         }
 685
 686         ilen = min_t(size_t, MAX_INLINE_DATA(inode), i_size_read(inode));
 687         if (start >= ilen)
 688                 goto out;
 689         if (start + len < ilen)
 690                 ilen = start + len;
 691         ilen -= start;
 692
 693         get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
 694         byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
 695         byteaddr += (char *)inline_data_addr(inode, ipage) -
 696                                         (char *)F2FS_INODE(ipage);
 697         err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
 698 out:
 699         f2fs_put_page(ipage, 1);
 700         return err;
 701 }