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_encrypted_file(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 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 truncate_inline_inode(struct inode *inode, struct page *ipage, u64 from)
  68 {
  69         void *addr;
  70
  71         if (from >= MAX_INLINE_DATA(inode))
  72                 return;
  73
  74         addr = inline_data_addr(inode, ipage);
  75
  76         f2fs_wait_on_page_writeback(ipage, NODE, true);
  77         memset(addr + from, 0, MAX_INLINE_DATA(inode) - from);
  78         set_page_dirty(ipage);
  79
  80         if (from == 0)
  81                 clear_inode_flag(inode, FI_DATA_EXIST);
  82 }
  83
  84 int f2fs_read_inline_data(struct inode *inode, struct page *page)
  85 {
  86         struct page *ipage;
  87
  88         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
  89         if (IS_ERR(ipage)) {
  90                 unlock_page(page);
  91                 return PTR_ERR(ipage);
  92         }
  93
  94         if (!f2fs_has_inline_data(inode)) {
  95                 f2fs_put_page(ipage, 1);
  96                 return -EAGAIN;
  97         }
  98
  99         if (page->index)
 100                 zero_user_segment(page, 0, PAGE_SIZE);
 101         else
 102                 read_inline_data(page, ipage);
 103
 104         if (!PageUptodate(page))
 105                 SetPageUptodate(page);
 106         f2fs_put_page(ipage, 1);
 107         unlock_page(page);
 108         return 0;
 109 }
 110
 111 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
 112 {
 113         struct f2fs_io_info fio = {
 114                 .sbi = F2FS_I_SB(dn->inode),
 115                 .ino = dn->inode->i_ino,
 116                 .type = DATA,
 117                 .op = REQ_OP_WRITE,
 118                 .op_flags = REQ_SYNC | REQ_PRIO,
 119                 .page = page,
 120                 .encrypted_page = NULL,
 121                 .io_type = FS_DATA_IO,
 122         };
 123         int dirty, err;
 124
 125         if (!f2fs_exist_data(dn->inode))
 126                 goto clear_out;
 127
 128         err = f2fs_reserve_block(dn, 0);
 129         if (err)
 130                 return err;
 131
 132         if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
 133                 f2fs_put_dnode(dn);
 134                 set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
 135                 f2fs_msg(fio.sbi->sb, KERN_WARNING,
 136                         "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
 137                         "run fsck to fix.",
 138                         __func__, dn->inode->i_ino, dn->data_blkaddr);
 139                 return -EFSCORRUPTED;
 140         }
 141
 142         f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
 143
 144         read_inline_data(page, dn->inode_page);
 145         set_page_dirty(page);
 146
 147         /* clear dirty state */
 148         dirty = clear_page_dirty_for_io(page);
 149
 150         /* write data page to try to make data consistent */
 151         set_page_writeback(page);
 152         fio.old_blkaddr = dn->data_blkaddr;
 153         set_inode_flag(dn->inode, FI_HOT_DATA);
 154         write_data_page(dn, &fio);
 155         f2fs_wait_on_page_writeback(page, DATA, true);
 156         if (dirty) {
 157                 inode_dec_dirty_pages(dn->inode);
 158                 remove_dirty_inode(dn->inode);
 159         }
 160
 161         /* this converted inline_data should be recovered. */
 162         set_inode_flag(dn->inode, FI_APPEND_WRITE);
 163
 164         /* clear inline data and flag after data writeback */
 165         truncate_inline_inode(dn->inode, dn->inode_page, 0);
 166         clear_inline_node(dn->inode_page);
 167 clear_out:
 168         stat_dec_inline_inode(dn->inode);
 169         clear_inode_flag(dn->inode, FI_INLINE_DATA);
 170         f2fs_put_dnode(dn);
 171         return 0;
 172 }
 173
 174 int f2fs_convert_inline_inode(struct inode *inode)
 175 {
 176         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 177         struct dnode_of_data dn;
 178         struct page *ipage, *page;
 179         int err = 0;
 180
 181         if (!f2fs_has_inline_data(inode))
 182                 return 0;
 183
 184         page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
 185         if (!page)
 186                 return -ENOMEM;
 187
 188         f2fs_lock_op(sbi);
 189
 190         ipage = get_node_page(sbi, inode->i_ino);
 191         if (IS_ERR(ipage)) {
 192                 err = PTR_ERR(ipage);
 193                 goto out;
 194         }
 195
 196         set_new_dnode(&dn, inode, ipage, ipage, 0);
 197
 198         if (f2fs_has_inline_data(inode))
 199                 err = f2fs_convert_inline_page(&dn, page);
 200
 201         f2fs_put_dnode(&dn);
 202 out:
 203         f2fs_unlock_op(sbi);
 204
 205         f2fs_put_page(page, 1);
 206
 207         f2fs_balance_fs(sbi, dn.node_changed);
 208
 209         return err;
 210 }
 211
 212 int f2fs_write_inline_data(struct inode *inode, struct page *page)
 213 {
 214         void *src_addr, *dst_addr;
 215         struct dnode_of_data dn;
 216         struct address_space *mapping = page_mapping(page);
 217         unsigned long flags;
 218         int err;
 219
 220         set_new_dnode(&dn, inode, NULL, NULL, 0);
 221         err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
 222         if (err)
 223                 return err;
 224
 225         if (!f2fs_has_inline_data(inode)) {
 226                 f2fs_put_dnode(&dn);
 227                 return -EAGAIN;
 228         }
 229
 230         f2fs_bug_on(F2FS_I_SB(inode), page->index);
 231
 232         f2fs_wait_on_page_writeback(dn.inode_page, NODE, true);
 233         src_addr = kmap_atomic(page);
 234         dst_addr = inline_data_addr(inode, dn.inode_page);
 235         memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
 236         kunmap_atomic(src_addr);
 237         set_page_dirty(dn.inode_page);
 238
 239         spin_lock_irqsave(&mapping->tree_lock, flags);
 240         radix_tree_tag_clear(&mapping->page_tree, page_index(page),
 241                              PAGECACHE_TAG_DIRTY);
 242         spin_unlock_irqrestore(&mapping->tree_lock, flags);
 243
 244         set_inode_flag(inode, FI_APPEND_WRITE);
 245         set_inode_flag(inode, FI_DATA_EXIST);
 246
 247         clear_inline_node(dn.inode_page);
 248         f2fs_put_dnode(&dn);
 249         return 0;
 250 }
 251
 252 bool recover_inline_data(struct inode *inode, struct page *npage)
 253 {
 254         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 255         struct f2fs_inode *ri = NULL;
 256         void *src_addr, *dst_addr;
 257         struct page *ipage;
 258
 259         /*
 260          * The inline_data recovery policy is as follows.
 261          * [prev.] [next] of inline_data flag
 262          *    o       o  -> recover inline_data
 263          *    o       x  -> remove inline_data, and then recover data blocks
 264          *    x       o  -> remove inline_data, and then recover inline_data
 265          *    x       x  -> recover data blocks
 266          */
 267         if (IS_INODE(npage))
 268                 ri = F2FS_INODE(npage);
 269
 270         if (f2fs_has_inline_data(inode) &&
 271                         ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 272 process_inline:
 273                 ipage = get_node_page(sbi, inode->i_ino);
 274                 f2fs_bug_on(sbi, IS_ERR(ipage));
 275
 276                 f2fs_wait_on_page_writeback(ipage, NODE, true);
 277
 278                 src_addr = inline_data_addr(inode, npage);
 279                 dst_addr = inline_data_addr(inode, ipage);
 280                 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
 281
 282                 set_inode_flag(inode, FI_INLINE_DATA);
 283                 set_inode_flag(inode, FI_DATA_EXIST);
 284
 285                 set_page_dirty(ipage);
 286                 f2fs_put_page(ipage, 1);
 287                 return true;
 288         }
 289
 290         if (f2fs_has_inline_data(inode)) {
 291                 ipage = get_node_page(sbi, inode->i_ino);
 292                 f2fs_bug_on(sbi, IS_ERR(ipage));
 293                 truncate_inline_inode(inode, ipage, 0);
 294                 clear_inode_flag(inode, FI_INLINE_DATA);
 295                 f2fs_put_page(ipage, 1);
 296         } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 297                 if (truncate_blocks(inode, 0, false))
 298                         return false;
 299                 goto process_inline;
 300         }
 301         return false;
 302 }
 303
 304 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
 305                         struct fscrypt_name *fname, struct page **res_page)
 306 {
 307         struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
 308         struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
 309         struct f2fs_dir_entry *de;
 310         struct f2fs_dentry_ptr d;
 311         struct page *ipage;
 312         void *inline_dentry;
 313         f2fs_hash_t namehash;
 314
 315         ipage = get_node_page(sbi, dir->i_ino);
 316         if (IS_ERR(ipage)) {
 317                 *res_page = ipage;
 318                 return NULL;
 319         }
 320
 321         namehash = f2fs_dentry_hash(&name, fname);
 322
 323         inline_dentry = inline_data_addr(dir, ipage);
 324
 325         make_dentry_ptr_inline(dir, &d, inline_dentry);
 326         de = find_target_dentry(fname, namehash, NULL, &d);
 327         unlock_page(ipage);
 328         if (de)
 329                 *res_page = ipage;
 330         else
 331                 f2fs_put_page(ipage, 0);
 332
 333         return de;
 334 }
 335
 336 int make_empty_inline_dir(struct inode *inode, struct inode *parent,
 337                                                         struct page *ipage)
 338 {
 339         struct f2fs_dentry_ptr d;
 340         void *inline_dentry;
 341
 342         inline_dentry = inline_data_addr(inode, ipage);
 343
 344         make_dentry_ptr_inline(inode, &d, inline_dentry);
 345         do_make_empty_dir(inode, parent, &d);
 346
 347         set_page_dirty(ipage);
 348
 349         /* update i_size to MAX_INLINE_DATA */
 350         if (i_size_read(inode) < MAX_INLINE_DATA(inode))
 351                 f2fs_i_size_write(inode, MAX_INLINE_DATA(inode));
 352         return 0;
 353 }
 354
 355 /*
 356  * NOTE: ipage is grabbed by caller, but if any error occurs, we should
 357  * release ipage in this function.
 358  */
 359 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
 360                                                         void *inline_dentry)
 361 {
 362         struct page *page;
 363         struct dnode_of_data dn;
 364         struct f2fs_dentry_block *dentry_blk;
 365         struct f2fs_dentry_ptr src, dst;
 366         int err;
 367
 368         page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
 369         if (!page) {
 370                 f2fs_put_page(ipage, 1);
 371                 return -ENOMEM;
 372         }
 373
 374         set_new_dnode(&dn, dir, ipage, NULL, 0);
 375         err = f2fs_reserve_block(&dn, 0);
 376         if (err)
 377                 goto out;
 378
 379         if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
 380                 f2fs_put_dnode(&dn);
 381                 set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
 382                 f2fs_msg(F2FS_P_SB(page)->sb, KERN_WARNING,
 383                         "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
 384                         "run fsck to fix.",
 385                         __func__, dir->i_ino, dn.data_blkaddr);
 386                 err = -EFSCORRUPTED;
 387                 goto out;
 388         }
 389
 390         f2fs_wait_on_page_writeback(page, DATA, true);
 391         zero_user_segment(page, MAX_INLINE_DATA(dir), PAGE_SIZE);
 392
 393         dentry_blk = kmap_atomic(page);
 394
 395         make_dentry_ptr_inline(dir, &src, inline_dentry);
 396         make_dentry_ptr_block(dir, &dst, dentry_blk);
 397
 398         /* copy data from inline dentry block to new dentry block */
 399         memcpy(dst.bitmap, src.bitmap, src.nr_bitmap);
 400         memset(dst.bitmap + src.nr_bitmap, 0, dst.nr_bitmap - src.nr_bitmap);
 401         /*
 402          * we do not need to zero out remainder part of dentry and filename
 403          * field, since we have used bitmap for marking the usage status of
 404          * them, besides, we can also ignore copying/zeroing reserved space
 405          * of dentry block, because them haven't been used so far.
 406          */
 407         memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max);
 408         memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN);
 409
 410         kunmap_atomic(dentry_blk);
 411         if (!PageUptodate(page))
 412                 SetPageUptodate(page);
 413         set_page_dirty(page);
 414
 415         /* clear inline dir and flag after data writeback */
 416         truncate_inline_inode(dir, ipage, 0);
 417
 418         stat_dec_inline_dir(dir);
 419         clear_inode_flag(dir, FI_INLINE_DENTRY);
 420
 421         f2fs_i_depth_write(dir, 1);
 422         if (i_size_read(dir) < PAGE_SIZE)
 423                 f2fs_i_size_write(dir, PAGE_SIZE);
 424 out:
 425         f2fs_put_page(page, 1);
 426         return err;
 427 }
 428
 429 static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
 430 {
 431         struct f2fs_dentry_ptr d;
 432         unsigned long bit_pos = 0;
 433         int err = 0;
 434
 435         make_dentry_ptr_inline(dir, &d, inline_dentry);
 436
 437         while (bit_pos < d.max) {
 438                 struct f2fs_dir_entry *de;
 439                 struct qstr new_name;
 440                 nid_t ino;
 441                 umode_t fake_mode;
 442
 443                 if (!test_bit_le(bit_pos, d.bitmap)) {
 444                         bit_pos++;
 445                         continue;
 446                 }
 447
 448                 de = &d.dentry[bit_pos];
 449
 450                 if (unlikely(!de->name_len)) {
 451                         bit_pos++;
 452                         continue;
 453                 }
 454
 455                 new_name.name = d.filename[bit_pos];
 456                 new_name.len = le16_to_cpu(de->name_len);
 457
 458                 ino = le32_to_cpu(de->ino);
 459                 fake_mode = get_de_type(de) << S_SHIFT;
 460
 461                 err = f2fs_add_regular_entry(dir, &new_name, NULL, NULL,
 462                                                         ino, fake_mode);
 463                 if (err)
 464                         goto punch_dentry_pages;
 465
 466                 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
 467         }
 468         return 0;
 469 punch_dentry_pages:
 470         truncate_inode_pages(&dir->i_data, 0);
 471         truncate_blocks(dir, 0, false);
 472         remove_dirty_inode(dir);
 473         return err;
 474 }
 475
 476 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
 477                                                         void *inline_dentry)
 478 {
 479         void *backup_dentry;
 480         int err;
 481
 482         backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
 483                                 MAX_INLINE_DATA(dir), GFP_F2FS_ZERO);
 484         if (!backup_dentry) {
 485                 f2fs_put_page(ipage, 1);
 486                 return -ENOMEM;
 487         }
 488
 489         memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA(dir));
 490         truncate_inline_inode(dir, ipage, 0);
 491
 492         unlock_page(ipage);
 493
 494         err = f2fs_add_inline_entries(dir, backup_dentry);
 495         if (err)
 496                 goto recover;
 497
 498         lock_page(ipage);
 499
 500         stat_dec_inline_dir(dir);
 501         clear_inode_flag(dir, FI_INLINE_DENTRY);
 502         kfree(backup_dentry);
 503         return 0;
 504 recover:
 505         lock_page(ipage);
 506         f2fs_wait_on_page_writeback(ipage, NODE, true);
 507         memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
 508         f2fs_i_depth_write(dir, 0);
 509         f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));
 510         set_page_dirty(ipage);
 511         f2fs_put_page(ipage, 1);
 512
 513         kfree(backup_dentry);
 514         return err;
 515 }
 516
 517 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
 518                                                         void *inline_dentry)
 519 {
 520         if (!F2FS_I(dir)->i_dir_level)
 521                 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
 522         else
 523                 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
 524 }
 525
 526 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
 527                                 const struct qstr *orig_name,
 528                                 struct inode *inode, nid_t ino, umode_t mode)
 529 {
 530         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 531         struct page *ipage;
 532         unsigned int bit_pos;
 533         f2fs_hash_t name_hash;
 534         void *inline_dentry = NULL;
 535         struct f2fs_dentry_ptr d;
 536         int slots = GET_DENTRY_SLOTS(new_name->len);
 537         struct page *page = NULL;
 538         int err = 0;
 539
 540         ipage = get_node_page(sbi, dir->i_ino);
 541         if (IS_ERR(ipage))
 542                 return PTR_ERR(ipage);
 543
 544         inline_dentry = inline_data_addr(dir, ipage);
 545         make_dentry_ptr_inline(dir, &d, inline_dentry);
 546
 547         bit_pos = room_for_filename(d.bitmap, slots, d.max);
 548         if (bit_pos >= d.max) {
 549                 err = f2fs_convert_inline_dir(dir, ipage, inline_dentry);
 550                 if (err)
 551                         return err;
 552                 err = -EAGAIN;
 553                 goto out;
 554         }
 555
 556         if (inode) {
 557                 down_write(&F2FS_I(inode)->i_sem);
 558                 page = init_inode_metadata(inode, dir, new_name,
 559                                                 orig_name, ipage);
 560                 if (IS_ERR(page)) {
 561                         err = PTR_ERR(page);
 562                         goto fail;
 563                 }
 564         }
 565
 566         f2fs_wait_on_page_writeback(ipage, NODE, true);
 567
 568         name_hash = f2fs_dentry_hash(new_name, NULL);
 569         f2fs_update_dentry(ino, mode, &d, new_name, name_hash, bit_pos);
 570
 571         set_page_dirty(ipage);
 572
 573         /* we don't need to mark_inode_dirty now */
 574         if (inode) {
 575                 f2fs_i_pino_write(inode, dir->i_ino);
 576                 f2fs_put_page(page, 1);
 577         }
 578
 579         update_parent_metadata(dir, inode, 0);
 580 fail:
 581         if (inode)
 582                 up_write(&F2FS_I(inode)->i_sem);
 583 out:
 584         f2fs_put_page(ipage, 1);
 585         return err;
 586 }
 587
 588 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
 589                                         struct inode *dir, struct inode *inode)
 590 {
 591         struct f2fs_dentry_ptr d;
 592         void *inline_dentry;
 593         int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
 594         unsigned int bit_pos;
 595         int i;
 596
 597         lock_page(page);
 598         f2fs_wait_on_page_writeback(page, NODE, true);
 599
 600         inline_dentry = inline_data_addr(dir, page);
 601         make_dentry_ptr_inline(dir, &d, inline_dentry);
 602
 603         bit_pos = dentry - d.dentry;
 604         for (i = 0; i < slots; i++)
 605                 __clear_bit_le(bit_pos + i, d.bitmap);
 606
 607         set_page_dirty(page);
 608         f2fs_put_page(page, 1);
 609
 610         dir->i_ctime = dir->i_mtime = current_time(dir);
 611         f2fs_mark_inode_dirty_sync(dir, false);
 612
 613         if (inode)
 614                 f2fs_drop_nlink(dir, inode);
 615 }
 616
 617 bool f2fs_empty_inline_dir(struct inode *dir)
 618 {
 619         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 620         struct page *ipage;
 621         unsigned int bit_pos = 2;
 622         void *inline_dentry;
 623         struct f2fs_dentry_ptr d;
 624
 625         ipage = get_node_page(sbi, dir->i_ino);
 626         if (IS_ERR(ipage))
 627                 return false;
 628
 629         inline_dentry = inline_data_addr(dir, ipage);
 630         make_dentry_ptr_inline(dir, &d, inline_dentry);
 631
 632         bit_pos = find_next_bit_le(d.bitmap, d.max, bit_pos);
 633
 634         f2fs_put_page(ipage, 1);
 635
 636         if (bit_pos < d.max)
 637                 return false;
 638
 639         return true;
 640 }
 641
 642 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
 643                                 struct fscrypt_str *fstr)
 644 {
 645         struct inode *inode = file_inode(file);
 646         struct page *ipage = NULL;
 647         struct f2fs_dentry_ptr d;
 648         void *inline_dentry = NULL;
 649         int err;
 650
 651         make_dentry_ptr_inline(inode, &d, inline_dentry);
 652
 653         if (ctx->pos == d.max)
 654                 return 0;
 655
 656         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 657         if (IS_ERR(ipage))
 658                 return PTR_ERR(ipage);
 659
 660         /*
 661          * f2fs_readdir was protected by inode.i_rwsem, it is safe to access
 662          * ipage without page's lock held.
 663          */
 664         unlock_page(ipage);
 665
 666         inline_dentry = inline_data_addr(inode, ipage);
 667
 668         make_dentry_ptr_inline(inode, &d, inline_dentry);
 669
 670         err = f2fs_fill_dentries(ctx, &d, 0, fstr);
 671         if (!err)
 672                 ctx->pos = d.max;
 673
 674         f2fs_put_page(ipage, 0);
 675         return err < 0 ? err : 0;
 676 }
 677
 678 int f2fs_inline_data_fiemap(struct inode *inode,
 679                 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
 680 {
 681         __u64 byteaddr, ilen;
 682         __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
 683                 FIEMAP_EXTENT_LAST;
 684         struct node_info ni;
 685         struct page *ipage;
 686         int err = 0;
 687
 688         ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
 689         if (IS_ERR(ipage))
 690                 return PTR_ERR(ipage);
 691
 692         if (!f2fs_has_inline_data(inode)) {
 693                 err = -EAGAIN;
 694                 goto out;
 695         }
 696
 697         ilen = min_t(size_t, MAX_INLINE_DATA(inode), i_size_read(inode));
 698         if (start >= ilen)
 699                 goto out;
 700         if (start + len < ilen)
 701                 ilen = start + len;
 702         ilen -= start;
 703
 704         get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
 705         byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
 706         byteaddr += (char *)inline_data_addr(inode, ipage) -
 707                                         (char *)F2FS_INODE(ipage);
 708         err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
 709 out:
 710         f2fs_put_page(ipage, 1);
 711         return err;
 712 }