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(inode))
  26                 return false;
  27
  28         if (f2fs_post_read_required(inode))
  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 f2fs_do_read_inline_data(struct page *page, struct page *ipage)
  46 {
  47         struct inode *inode = page->mapping->host;
  48         void *src_addr, *dst_addr;
  49
  50         if (PageUptodate(page))
  51                 return;
  52
  53         f2fs_bug_on(F2FS_P_SB(page), page->index);
  54
  55         zero_user_segment(page, MAX_INLINE_DATA(inode), PAGE_SIZE);
  56
  57         /* Copy the whole inline data block */
  58         src_addr = inline_data_addr(inode, ipage);
  59         dst_addr = kmap_atomic(page);
  60         memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
  61         flush_dcache_page(page);
  62         kunmap_atomic(dst_addr);
  63         if (!PageUptodate(page))
  64                 SetPageUptodate(page);
  65 }
  66
  67 void f2fs_truncate_inline_inode(struct inode *inode,
  68                                         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         ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
  90         if (IS_ERR(ipage)) {
  91                 unlock_page(page);
  92                 return PTR_ERR(ipage);
  93         }
  94
  95         if (!f2fs_has_inline_data(inode)) {
  96                 f2fs_put_page(ipage, 1);
  97                 return -EAGAIN;
  98         }
  99
 100         if (page->index)
 101                 zero_user_segment(page, 0, PAGE_SIZE);
 102         else
 103                 f2fs_do_read_inline_data(page, ipage);
 104
 105         if (!PageUptodate(page))
 106                 SetPageUptodate(page);
 107         f2fs_put_page(ipage, 1);
 108         unlock_page(page);
 109         return 0;
 110 }
 111
 112 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
 113 {
 114         struct f2fs_io_info fio = {
 115                 .sbi = F2FS_I_SB(dn->inode),
 116                 .ino = dn->inode->i_ino,
 117                 .type = DATA,
 118                 .op = REQ_OP_WRITE,
 119                 .op_flags = REQ_SYNC | REQ_PRIO,
 120                 .page = page,
 121                 .encrypted_page = NULL,
 122                 .io_type = FS_DATA_IO,
 123         };
 124         struct node_info ni;
 125         int dirty, err;
 126
 127         if (!f2fs_exist_data(dn->inode))
 128                 goto clear_out;
 129
 130         err = f2fs_reserve_block(dn, 0);
 131         if (err)
 132                 return err;
 133
 134         err = f2fs_get_node_info(fio.sbi, dn->nid, &ni);
 135         if (err) {
 136                 f2fs_put_dnode(dn);
 137                 return err;
 138         }
 139
 140         fio.version = ni.version;
 141
 142         if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
 143                 f2fs_put_dnode(dn);
 144                 set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
 145                 f2fs_msg(fio.sbi->sb, KERN_WARNING,
 146                         "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
 147                         "run fsck to fix.",
 148                         __func__, dn->inode->i_ino, dn->data_blkaddr);
 149                 return -EINVAL;
 150         }
 151
 152         f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
 153
 154         f2fs_do_read_inline_data(page, dn->inode_page);
 155         set_page_dirty(page);
 156
 157         /* clear dirty state */
 158         dirty = clear_page_dirty_for_io(page);
 159
 160         /* write data page to try to make data consistent */
 161         set_page_writeback(page);
 162         ClearPageError(page);
 163         fio.old_blkaddr = dn->data_blkaddr;
 164         set_inode_flag(dn->inode, FI_HOT_DATA);
 165         f2fs_outplace_write_data(dn, &fio);
 166         f2fs_wait_on_page_writeback(page, DATA, true);
 167         if (dirty) {
 168                 inode_dec_dirty_pages(dn->inode);
 169                 f2fs_remove_dirty_inode(dn->inode);
 170         }
 171
 172         /* this converted inline_data should be recovered. */
 173         set_inode_flag(dn->inode, FI_APPEND_WRITE);
 174
 175         /* clear inline data and flag after data writeback */
 176         f2fs_truncate_inline_inode(dn->inode, dn->inode_page, 0);
 177         clear_inline_node(dn->inode_page);
 178 clear_out:
 179         stat_dec_inline_inode(dn->inode);
 180         clear_inode_flag(dn->inode, FI_INLINE_DATA);
 181         f2fs_put_dnode(dn);
 182         return 0;
 183 }
 184
 185 int f2fs_convert_inline_inode(struct inode *inode)
 186 {
 187         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 188         struct dnode_of_data dn;
 189         struct page *ipage, *page;
 190         int err = 0;
 191
 192         if (!f2fs_has_inline_data(inode))
 193                 return 0;
 194
 195         page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
 196         if (!page)
 197                 return -ENOMEM;
 198
 199         f2fs_lock_op(sbi);
 200
 201         ipage = f2fs_get_node_page(sbi, inode->i_ino);
 202         if (IS_ERR(ipage)) {
 203                 err = PTR_ERR(ipage);
 204                 goto out;
 205         }
 206
 207         set_new_dnode(&dn, inode, ipage, ipage, 0);
 208
 209         if (f2fs_has_inline_data(inode))
 210                 err = f2fs_convert_inline_page(&dn, page);
 211
 212         f2fs_put_dnode(&dn);
 213 out:
 214         f2fs_unlock_op(sbi);
 215
 216         f2fs_put_page(page, 1);
 217
 218         f2fs_balance_fs(sbi, dn.node_changed);
 219
 220         return err;
 221 }
 222
 223 int f2fs_write_inline_data(struct inode *inode, struct page *page)
 224 {
 225         void *src_addr, *dst_addr;
 226         struct dnode_of_data dn;
 227         int err;
 228
 229         set_new_dnode(&dn, inode, NULL, NULL, 0);
 230         err = f2fs_get_dnode_of_data(&dn, 0, LOOKUP_NODE);
 231         if (err)
 232                 return err;
 233
 234         if (!f2fs_has_inline_data(inode)) {
 235                 f2fs_put_dnode(&dn);
 236                 return -EAGAIN;
 237         }
 238
 239         f2fs_bug_on(F2FS_I_SB(inode), page->index);
 240
 241         f2fs_wait_on_page_writeback(dn.inode_page, NODE, true);
 242         src_addr = kmap_atomic(page);
 243         dst_addr = inline_data_addr(inode, dn.inode_page);
 244         memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
 245         kunmap_atomic(src_addr);
 246         set_page_dirty(dn.inode_page);
 247
 248         f2fs_clear_radix_tree_dirty_tag(page);
 249
 250         set_inode_flag(inode, FI_APPEND_WRITE);
 251         set_inode_flag(inode, FI_DATA_EXIST);
 252
 253         clear_inline_node(dn.inode_page);
 254         f2fs_put_dnode(&dn);
 255         return 0;
 256 }
 257
 258 bool f2fs_recover_inline_data(struct inode *inode, struct page *npage)
 259 {
 260         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 261         struct f2fs_inode *ri = NULL;
 262         void *src_addr, *dst_addr;
 263         struct page *ipage;
 264
 265         /*
 266          * The inline_data recovery policy is as follows.
 267          * [prev.] [next] of inline_data flag
 268          *    o       o  -> recover inline_data
 269          *    o       x  -> remove inline_data, and then recover data blocks
 270          *    x       o  -> remove inline_data, and then recover inline_data
 271          *    x       x  -> recover data blocks
 272          */
 273         if (IS_INODE(npage))
 274                 ri = F2FS_INODE(npage);
 275
 276         if (f2fs_has_inline_data(inode) &&
 277                         ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 278 process_inline:
 279                 ipage = f2fs_get_node_page(sbi, inode->i_ino);
 280                 f2fs_bug_on(sbi, IS_ERR(ipage));
 281
 282                 f2fs_wait_on_page_writeback(ipage, NODE, true);
 283
 284                 src_addr = inline_data_addr(inode, npage);
 285                 dst_addr = inline_data_addr(inode, ipage);
 286                 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
 287
 288                 set_inode_flag(inode, FI_INLINE_DATA);
 289                 set_inode_flag(inode, FI_DATA_EXIST);
 290
 291                 set_page_dirty(ipage);
 292                 f2fs_put_page(ipage, 1);
 293                 return true;
 294         }
 295
 296         if (f2fs_has_inline_data(inode)) {
 297                 ipage = f2fs_get_node_page(sbi, inode->i_ino);
 298                 f2fs_bug_on(sbi, IS_ERR(ipage));
 299                 f2fs_truncate_inline_inode(inode, ipage, 0);
 300                 clear_inode_flag(inode, FI_INLINE_DATA);
 301                 f2fs_put_page(ipage, 1);
 302         } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 303                 if (f2fs_truncate_blocks(inode, 0, false))
 304                         return false;
 305                 goto process_inline;
 306         }
 307         return false;
 308 }
 309
 310 struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
 311                         struct fscrypt_name *fname, struct page **res_page)
 312 {
 313         struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
 314         struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
 315         struct f2fs_dir_entry *de;
 316         struct f2fs_dentry_ptr d;
 317         struct page *ipage;
 318         void *inline_dentry;
 319         f2fs_hash_t namehash;
 320
 321         ipage = f2fs_get_node_page(sbi, dir->i_ino);
 322         if (IS_ERR(ipage)) {
 323                 *res_page = ipage;
 324                 return NULL;
 325         }
 326
 327         namehash = f2fs_dentry_hash(&name, fname);
 328
 329         inline_dentry = inline_data_addr(dir, ipage);
 330
 331         make_dentry_ptr_inline(dir, &d, inline_dentry);
 332         de = f2fs_find_target_dentry(fname, namehash, NULL, &d);
 333         unlock_page(ipage);
 334         if (de)
 335                 *res_page = ipage;
 336         else
 337                 f2fs_put_page(ipage, 0);
 338
 339         return de;
 340 }
 341
 342 int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
 343                                                         struct page *ipage)
 344 {
 345         struct f2fs_dentry_ptr d;
 346         void *inline_dentry;
 347
 348         inline_dentry = inline_data_addr(inode, ipage);
 349
 350         make_dentry_ptr_inline(inode, &d, inline_dentry);
 351         f2fs_do_make_empty_dir(inode, parent, &d);
 352
 353         set_page_dirty(ipage);
 354
 355         /* update i_size to MAX_INLINE_DATA */
 356         if (i_size_read(inode) < MAX_INLINE_DATA(inode))
 357                 f2fs_i_size_write(inode, MAX_INLINE_DATA(inode));
 358         return 0;
 359 }
 360
 361 /*
 362  * NOTE: ipage is grabbed by caller, but if any error occurs, we should
 363  * release ipage in this function.
 364  */
 365 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
 366                                                         void *inline_dentry)
 367 {
 368         struct page *page;
 369         struct dnode_of_data dn;
 370         struct f2fs_dentry_block *dentry_blk;
 371         struct f2fs_dentry_ptr src, dst;
 372         int err;
 373
 374         page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
 375         if (!page) {
 376                 f2fs_put_page(ipage, 1);
 377                 return -ENOMEM;
 378         }
 379
 380         set_new_dnode(&dn, dir, ipage, NULL, 0);
 381         err = f2fs_reserve_block(&dn, 0);
 382         if (err)
 383                 goto out;
 384
 385         if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
 386                 f2fs_put_dnode(&dn);
 387                 set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
 388                 f2fs_msg(F2FS_P_SB(page)->sb, KERN_WARNING,
 389                         "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
 390                         "run fsck to fix.",
 391                         __func__, dir->i_ino, dn.data_blkaddr);
 392                 err = -EINVAL;
 393                 goto out;
 394         }
 395
 396         f2fs_wait_on_page_writeback(page, DATA, true);
 397
 398         dentry_blk = page_address(page);
 399
 400         make_dentry_ptr_inline(dir, &src, inline_dentry);
 401         make_dentry_ptr_block(dir, &dst, dentry_blk);
 402
 403         /* copy data from inline dentry block to new dentry block */
 404         memcpy(dst.bitmap, src.bitmap, src.nr_bitmap);
 405         memset(dst.bitmap + src.nr_bitmap, 0, dst.nr_bitmap - src.nr_bitmap);
 406         /*
 407          * we do not need to zero out remainder part of dentry and filename
 408          * field, since we have used bitmap for marking the usage status of
 409          * them, besides, we can also ignore copying/zeroing reserved space
 410          * of dentry block, because them haven't been used so far.
 411          */
 412         memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max);
 413         memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN);
 414
 415         if (!PageUptodate(page))
 416                 SetPageUptodate(page);
 417         set_page_dirty(page);
 418
 419         /* clear inline dir and flag after data writeback */
 420         f2fs_truncate_inline_inode(dir, ipage, 0);
 421
 422         stat_dec_inline_dir(dir);
 423         clear_inode_flag(dir, FI_INLINE_DENTRY);
 424
 425         f2fs_i_depth_write(dir, 1);
 426         if (i_size_read(dir) < PAGE_SIZE)
 427                 f2fs_i_size_write(dir, PAGE_SIZE);
 428 out:
 429         f2fs_put_page(page, 1);
 430         return err;
 431 }
 432
 433 static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
 434 {
 435         struct f2fs_dentry_ptr d;
 436         unsigned long bit_pos = 0;
 437         int err = 0;
 438
 439         make_dentry_ptr_inline(dir, &d, inline_dentry);
 440
 441         while (bit_pos < d.max) {
 442                 struct f2fs_dir_entry *de;
 443                 struct qstr new_name;
 444                 nid_t ino;
 445                 umode_t fake_mode;
 446
 447                 if (!test_bit_le(bit_pos, d.bitmap)) {
 448                         bit_pos++;
 449                         continue;
 450                 }
 451
 452                 de = &d.dentry[bit_pos];
 453
 454                 if (unlikely(!de->name_len)) {
 455                         bit_pos++;
 456                         continue;
 457                 }
 458
 459                 new_name.name = d.filename[bit_pos];
 460                 new_name.len = le16_to_cpu(de->name_len);
 461
 462                 ino = le32_to_cpu(de->ino);
 463                 fake_mode = f2fs_get_de_type(de) << S_SHIFT;
 464
 465                 err = f2fs_add_regular_entry(dir, &new_name, NULL, NULL,
 466                                                         ino, fake_mode);
 467                 if (err)
 468                         goto punch_dentry_pages;
 469
 470                 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
 471         }
 472         return 0;
 473 punch_dentry_pages:
 474         truncate_inode_pages(&dir->i_data, 0);
 475         f2fs_truncate_blocks(dir, 0, false);
 476         f2fs_remove_dirty_inode(dir);
 477         return err;
 478 }
 479
 480 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
 481                                                         void *inline_dentry)
 482 {
 483         void *backup_dentry;
 484         int err;
 485
 486         backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
 487                                 MAX_INLINE_DATA(dir), GFP_F2FS_ZERO);
 488         if (!backup_dentry) {
 489                 f2fs_put_page(ipage, 1);
 490                 return -ENOMEM;
 491         }
 492
 493         memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA(dir));
 494         f2fs_truncate_inline_inode(dir, ipage, 0);
 495
 496         unlock_page(ipage);
 497
 498         err = f2fs_add_inline_entries(dir, backup_dentry);
 499         if (err)
 500                 goto recover;
 501
 502         lock_page(ipage);
 503
 504         stat_dec_inline_dir(dir);
 505         clear_inode_flag(dir, FI_INLINE_DENTRY);
 506         kfree(backup_dentry);
 507         return 0;
 508 recover:
 509         lock_page(ipage);
 510         f2fs_wait_on_page_writeback(ipage, NODE, true);
 511         memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
 512         f2fs_i_depth_write(dir, 0);
 513         f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));
 514         set_page_dirty(ipage);
 515         f2fs_put_page(ipage, 1);
 516
 517         kfree(backup_dentry);
 518         return err;
 519 }
 520
 521 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
 522                                                         void *inline_dentry)
 523 {
 524         if (!F2FS_I(dir)->i_dir_level)
 525                 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
 526         else
 527                 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
 528 }
 529
 530 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
 531                                 const struct qstr *orig_name,
 532                                 struct inode *inode, nid_t ino, umode_t mode)
 533 {
 534         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 535         struct page *ipage;
 536         unsigned int bit_pos;
 537         f2fs_hash_t name_hash;
 538         void *inline_dentry = NULL;
 539         struct f2fs_dentry_ptr d;
 540         int slots = GET_DENTRY_SLOTS(new_name->len);
 541         struct page *page = NULL;
 542         int err = 0;
 543
 544         ipage = f2fs_get_node_page(sbi, dir->i_ino);
 545         if (IS_ERR(ipage))
 546                 return PTR_ERR(ipage);
 547
 548         inline_dentry = inline_data_addr(dir, ipage);
 549         make_dentry_ptr_inline(dir, &d, inline_dentry);
 550
 551         bit_pos = f2fs_room_for_filename(d.bitmap, slots, d.max);
 552         if (bit_pos >= d.max) {
 553                 err = f2fs_convert_inline_dir(dir, ipage, inline_dentry);
 554                 if (err)
 555                         return err;
 556                 err = -EAGAIN;
 557                 goto out;
 558         }
 559
 560         if (inode) {
 561                 down_write(&F2FS_I(inode)->i_sem);
 562                 page = f2fs_init_inode_metadata(inode, dir, new_name,
 563                                                 orig_name, ipage);
 564                 if (IS_ERR(page)) {
 565                         err = PTR_ERR(page);
 566                         goto fail;
 567                 }
 568         }
 569
 570         f2fs_wait_on_page_writeback(ipage, NODE, true);
 571
 572         name_hash = f2fs_dentry_hash(new_name, NULL);
 573         f2fs_update_dentry(ino, mode, &d, new_name, name_hash, bit_pos);
 574
 575         set_page_dirty(ipage);
 576
 577         /* we don't need to mark_inode_dirty now */
 578         if (inode) {
 579                 f2fs_i_pino_write(inode, dir->i_ino);
 580                 f2fs_put_page(page, 1);
 581         }
 582
 583         f2fs_update_parent_metadata(dir, inode, 0);
 584 fail:
 585         if (inode)
 586                 up_write(&F2FS_I(inode)->i_sem);
 587 out:
 588         f2fs_put_page(ipage, 1);
 589         return err;
 590 }
 591
 592 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
 593                                         struct inode *dir, struct inode *inode)
 594 {
 595         struct f2fs_dentry_ptr d;
 596         void *inline_dentry;
 597         int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
 598         unsigned int bit_pos;
 599         int i;
 600
 601         lock_page(page);
 602         f2fs_wait_on_page_writeback(page, NODE, true);
 603
 604         inline_dentry = inline_data_addr(dir, page);
 605         make_dentry_ptr_inline(dir, &d, inline_dentry);
 606
 607         bit_pos = dentry - d.dentry;
 608         for (i = 0; i < slots; i++)
 609                 __clear_bit_le(bit_pos + i, d.bitmap);
 610
 611         set_page_dirty(page);
 612         f2fs_put_page(page, 1);
 613
 614         dir->i_ctime = dir->i_mtime = current_time(dir);
 615         f2fs_mark_inode_dirty_sync(dir, false);
 616
 617         if (inode)
 618                 f2fs_drop_nlink(dir, inode);
 619 }
 620
 621 bool f2fs_empty_inline_dir(struct inode *dir)
 622 {
 623         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 624         struct page *ipage;
 625         unsigned int bit_pos = 2;
 626         void *inline_dentry;
 627         struct f2fs_dentry_ptr d;
 628
 629         ipage = f2fs_get_node_page(sbi, dir->i_ino);
 630         if (IS_ERR(ipage))
 631                 return false;
 632
 633         inline_dentry = inline_data_addr(dir, ipage);
 634         make_dentry_ptr_inline(dir, &d, inline_dentry);
 635
 636         bit_pos = find_next_bit_le(d.bitmap, d.max, bit_pos);
 637
 638         f2fs_put_page(ipage, 1);
 639
 640         if (bit_pos < d.max)
 641                 return false;
 642
 643         return true;
 644 }
 645
 646 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
 647                                 struct fscrypt_str *fstr)
 648 {
 649         struct inode *inode = file_inode(file);
 650         struct page *ipage = NULL;
 651         struct f2fs_dentry_ptr d;
 652         void *inline_dentry = NULL;
 653         int err;
 654
 655         make_dentry_ptr_inline(inode, &d, inline_dentry);
 656
 657         if (ctx->pos == d.max)
 658                 return 0;
 659
 660         ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
 661         if (IS_ERR(ipage))
 662                 return PTR_ERR(ipage);
 663
 664         inline_dentry = inline_data_addr(inode, ipage);
 665
 666         make_dentry_ptr_inline(inode, &d, inline_dentry);
 667
 668         err = f2fs_fill_dentries(ctx, &d, 0, fstr);
 669         if (!err)
 670                 ctx->pos = d.max;
 671
 672         f2fs_put_page(ipage, 1);
 673         return err < 0 ? err : 0;
 674 }
 675
 676 int f2fs_inline_data_fiemap(struct inode *inode,
 677                 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
 678 {
 679         __u64 byteaddr, ilen;
 680         __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
 681                 FIEMAP_EXTENT_LAST;
 682         struct node_info ni;
 683         struct page *ipage;
 684         int err = 0;
 685
 686         ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
 687         if (IS_ERR(ipage))
 688                 return PTR_ERR(ipage);
 689
 690         if (!f2fs_has_inline_data(inode)) {
 691                 err = -EAGAIN;
 692                 goto out;
 693         }
 694
 695         ilen = min_t(size_t, MAX_INLINE_DATA(inode), i_size_read(inode));
 696         if (start >= ilen)
 697                 goto out;
 698         if (start + len < ilen)
 699                 ilen = start + len;
 700         ilen -= start;
 701
 702         err = f2fs_get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
 703         if (err)
 704                 goto out;
 705
 706         byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
 707         byteaddr += (char *)inline_data_addr(inode, ipage) -
 708                                         (char *)F2FS_INODE(ipage);
 709         err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
 710 out:
 711         f2fs_put_page(ipage, 1);
 712         return err;
 713 }