fs/f2fs/inline.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/inline.c
   4  * Copyright (c) 2013, Intel Corporation
   5  * Authors: Huajun Li <huajun.li@intel.com>
   6  *          Haicheng Li <haicheng.li@intel.com>
   7  */
   8
   9 #include <linux/fs.h>
  10 #include <linux/f2fs_fs.h>
  11 #include <linux/fiemap.h>
  12
  13 #include "f2fs.h"
  14 #include "node.h"
  15 #include <trace/events/f2fs.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, 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_truncate_data_blocks_range(dn, 1);
 137                 f2fs_put_dnode(dn);
 138                 return err;
 139         }
 140
 141         fio.version = ni.version;
 142
 143         if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
 144                 f2fs_put_dnode(dn);
 145                 set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
 146                 f2fs_warn(fio.sbi, "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
 147                           __func__, dn->inode->i_ino, dn->data_blkaddr);
 148                 return -EFSCORRUPTED;
 149         }
 150
 151         f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
 152
 153         f2fs_do_read_inline_data(page, dn->inode_page);
 154         set_page_dirty(page);
 155
 156         /* clear dirty state */
 157         dirty = clear_page_dirty_for_io(page);
 158
 159         /* write data page to try to make data consistent */
 160         set_page_writeback(page);
 161         ClearPageError(page);
 162         fio.old_blkaddr = dn->data_blkaddr;
 163         set_inode_flag(dn->inode, FI_HOT_DATA);
 164         f2fs_outplace_write_data(dn, &fio);
 165         f2fs_wait_on_page_writeback(page, DATA, true, true);
 166         if (dirty) {
 167                 inode_dec_dirty_pages(dn->inode);
 168                 f2fs_remove_dirty_inode(dn->inode);
 169         }
 170
 171         /* this converted inline_data should be recovered. */
 172         set_inode_flag(dn->inode, FI_APPEND_WRITE);
 173
 174         /* clear inline data and flag after data writeback */
 175         f2fs_truncate_inline_inode(dn->inode, dn->inode_page, 0);
 176         clear_inline_node(dn->inode_page);
 177 clear_out:
 178         stat_dec_inline_inode(dn->inode);
 179         clear_inode_flag(dn->inode, FI_INLINE_DATA);
 180         f2fs_put_dnode(dn);
 181         return 0;
 182 }
 183
 184 int f2fs_convert_inline_inode(struct inode *inode)
 185 {
 186         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 187         struct dnode_of_data dn;
 188         struct page *ipage, *page;
 189         int err = 0;
 190
 191         if (!f2fs_has_inline_data(inode) ||
 192                         f2fs_hw_is_readonly(sbi) || f2fs_readonly(sbi->sb))
 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, 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_page_cache_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 int 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 data blocks, 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                 if (IS_ERR(ipage))
 281                         return PTR_ERR(ipage);
 282
 283                 f2fs_wait_on_page_writeback(ipage, NODE, true, 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 1;
 295         }
 296
 297         if (f2fs_has_inline_data(inode)) {
 298                 ipage = f2fs_get_node_page(sbi, inode->i_ino);
 299                 if (IS_ERR(ipage))
 300                         return PTR_ERR(ipage);
 301                 f2fs_truncate_inline_inode(inode, ipage, 0);
 302                 stat_dec_inline_inode(inode);
 303                 clear_inode_flag(inode, FI_INLINE_DATA);
 304                 f2fs_put_page(ipage, 1);
 305         } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
 306                 int ret;
 307
 308                 ret = f2fs_truncate_blocks(inode, 0, false);
 309                 if (ret)
 310                         return ret;
 311                 stat_inc_inline_inode(inode);
 312                 goto process_inline;
 313         }
 314         return 0;
 315 }
 316
 317 struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
 318                                         const struct f2fs_filename *fname,
 319                                         struct page **res_page)
 320 {
 321         struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
 322         struct f2fs_dir_entry *de;
 323         struct f2fs_dentry_ptr d;
 324         struct page *ipage;
 325         void *inline_dentry;
 326
 327         ipage = f2fs_get_node_page(sbi, dir->i_ino);
 328         if (IS_ERR(ipage)) {
 329                 *res_page = ipage;
 330                 return NULL;
 331         }
 332
 333         inline_dentry = inline_data_addr(dir, ipage);
 334
 335         make_dentry_ptr_inline(dir, &d, inline_dentry);
 336         de = f2fs_find_target_dentry(&d, fname, NULL);
 337         unlock_page(ipage);
 338         if (IS_ERR(de)) {
 339                 *res_page = ERR_CAST(de);
 340                 de = NULL;
 341         }
 342         if (de)
 343                 *res_page = ipage;
 344         else
 345                 f2fs_put_page(ipage, 0);
 346
 347         return de;
 348 }
 349
 350 int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
 351                                                         struct page *ipage)
 352 {
 353         struct f2fs_dentry_ptr d;
 354         void *inline_dentry;
 355
 356         inline_dentry = inline_data_addr(inode, ipage);
 357
 358         make_dentry_ptr_inline(inode, &d, inline_dentry);
 359         f2fs_do_make_empty_dir(inode, parent, &d);
 360
 361         set_page_dirty(ipage);
 362
 363         /* update i_size to MAX_INLINE_DATA */
 364         if (i_size_read(inode) < MAX_INLINE_DATA(inode))
 365                 f2fs_i_size_write(inode, MAX_INLINE_DATA(inode));
 366         return 0;
 367 }
 368
 369 /*
 370  * NOTE: ipage is grabbed by caller, but if any error occurs, we should
 371  * release ipage in this function.
 372  */
 373 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
 374                                                         void *inline_dentry)
 375 {
 376         struct page *page;
 377         struct dnode_of_data dn;
 378         struct f2fs_dentry_block *dentry_blk;
 379         struct f2fs_dentry_ptr src, dst;
 380         int err;
 381
 382         page = f2fs_grab_cache_page(dir->i_mapping, 0, true);
 383         if (!page) {
 384                 f2fs_put_page(ipage, 1);
 385                 return -ENOMEM;
 386         }
 387
 388         set_new_dnode(&dn, dir, ipage, NULL, 0);
 389         err = f2fs_reserve_block(&dn, 0);
 390         if (err)
 391                 goto out;
 392
 393         if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
 394                 f2fs_put_dnode(&dn);
 395                 set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
 396                 f2fs_warn(F2FS_P_SB(page), "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
 397                           __func__, dir->i_ino, dn.data_blkaddr);
 398                 err = -EFSCORRUPTED;
 399                 goto out;
 400         }
 401
 402         f2fs_wait_on_page_writeback(page, DATA, true, true);
 403
 404         dentry_blk = page_address(page);
 405
 406         make_dentry_ptr_inline(dir, &src, inline_dentry);
 407         make_dentry_ptr_block(dir, &dst, dentry_blk);
 408
 409         /* copy data from inline dentry block to new dentry block */
 410         memcpy(dst.bitmap, src.bitmap, src.nr_bitmap);
 411         memset(dst.bitmap + src.nr_bitmap, 0, dst.nr_bitmap - src.nr_bitmap);
 412         /*
 413          * we do not need to zero out remainder part of dentry and filename
 414          * field, since we have used bitmap for marking the usage status of
 415          * them, besides, we can also ignore copying/zeroing reserved space
 416          * of dentry block, because them haven't been used so far.
 417          */
 418         memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max);
 419         memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN);
 420
 421         if (!PageUptodate(page))
 422                 SetPageUptodate(page);
 423         set_page_dirty(page);
 424
 425         /* clear inline dir and flag after data writeback */
 426         f2fs_truncate_inline_inode(dir, ipage, 0);
 427
 428         stat_dec_inline_dir(dir);
 429         clear_inode_flag(dir, FI_INLINE_DENTRY);
 430
 431         /*
 432          * should retrieve reserved space which was used to keep
 433          * inline_dentry's structure for backward compatibility.
 434          */
 435         if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
 436                         !f2fs_has_inline_xattr(dir))
 437                 F2FS_I(dir)->i_inline_xattr_size = 0;
 438
 439         f2fs_i_depth_write(dir, 1);
 440         if (i_size_read(dir) < PAGE_SIZE)
 441                 f2fs_i_size_write(dir, PAGE_SIZE);
 442 out:
 443         f2fs_put_page(page, 1);
 444         return err;
 445 }
 446
 447 static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
 448 {
 449         struct f2fs_dentry_ptr d;
 450         unsigned long bit_pos = 0;
 451         int err = 0;
 452
 453         make_dentry_ptr_inline(dir, &d, inline_dentry);
 454
 455         while (bit_pos < d.max) {
 456                 struct f2fs_dir_entry *de;
 457                 struct f2fs_filename fname;
 458                 nid_t ino;
 459                 umode_t fake_mode;
 460
 461                 if (!test_bit_le(bit_pos, d.bitmap)) {
 462                         bit_pos++;
 463                         continue;
 464                 }
 465
 466                 de = &d.dentry[bit_pos];
 467
 468                 if (unlikely(!de->name_len)) {
 469                         bit_pos++;
 470                         continue;
 471                 }
 472
 473                 /*
 474                  * We only need the disk_name and hash to move the dentry.
 475                  * We don't need the original or casefolded filenames.
 476                  */
 477                 memset(&fname, 0, sizeof(fname));
 478                 fname.disk_name.name = d.filename[bit_pos];
 479                 fname.disk_name.len = le16_to_cpu(de->name_len);
 480                 fname.hash = de->hash_code;
 481
 482                 ino = le32_to_cpu(de->ino);
 483                 fake_mode = f2fs_get_de_type(de) << S_SHIFT;
 484
 485                 err = f2fs_add_regular_entry(dir, &fname, NULL, ino, fake_mode);
 486                 if (err)
 487                         goto punch_dentry_pages;
 488
 489                 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
 490         }
 491         return 0;
 492 punch_dentry_pages:
 493         truncate_inode_pages(&dir->i_data, 0);
 494         f2fs_truncate_blocks(dir, 0, false);
 495         f2fs_remove_dirty_inode(dir);
 496         return err;
 497 }
 498
 499 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
 500                                                         void *inline_dentry)
 501 {
 502         void *backup_dentry;
 503         int err;
 504
 505         backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
 506                                 MAX_INLINE_DATA(dir), GFP_F2FS_ZERO);
 507         if (!backup_dentry) {
 508                 f2fs_put_page(ipage, 1);
 509                 return -ENOMEM;
 510         }
 511
 512         memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA(dir));
 513         f2fs_truncate_inline_inode(dir, ipage, 0);
 514
 515         unlock_page(ipage);
 516
 517         err = f2fs_add_inline_entries(dir, backup_dentry);
 518         if (err)
 519                 goto recover;
 520
 521         lock_page(ipage);
 522
 523         stat_dec_inline_dir(dir);
 524         clear_inode_flag(dir, FI_INLINE_DENTRY);
 525
 526         /*
 527          * should retrieve reserved space which was used to keep
 528          * inline_dentry's structure for backward compatibility.
 529          */
 530         if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
 531                         !f2fs_has_inline_xattr(dir))
 532                 F2FS_I(dir)->i_inline_xattr_size = 0;
 533
 534         kfree(backup_dentry);
 535         return 0;
 536 recover:
 537         lock_page(ipage);
 538         f2fs_wait_on_page_writeback(ipage, NODE, true, true);
 539         memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
 540         f2fs_i_depth_write(dir, 0);
 541         f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));
 542         set_page_dirty(ipage);
 543         f2fs_put_page(ipage, 1);
 544
 545         kfree(backup_dentry);
 546         return err;
 547 }
 548
 549 static int do_convert_inline_dir(struct inode *dir, struct page *ipage,
 550                                                         void *inline_dentry)
 551 {
 552         if (!F2FS_I(dir)->i_dir_level)
 553                 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
 554         else
 555                 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
 556 }
 557
 558 int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
 559 {
 560         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 561         struct page *ipage;
 562         struct f2fs_filename fname;
 563         void *inline_dentry = NULL;
 564         int err = 0;
 565
 566         if (!f2fs_has_inline_dentry(dir))
 567                 return 0;
 568
 569         f2fs_lock_op(sbi);
 570
 571         err = f2fs_setup_filename(dir, &dentry->d_name, 0, &fname);
 572         if (err)
 573                 goto out;
 574
 575         ipage = f2fs_get_node_page(sbi, dir->i_ino);
 576         if (IS_ERR(ipage)) {
 577                 err = PTR_ERR(ipage);
 578                 goto out_fname;
 579         }
 580
 581         if (f2fs_has_enough_room(dir, ipage, &fname)) {
 582                 f2fs_put_page(ipage, 1);
 583                 goto out_fname;
 584         }
 585
 586         inline_dentry = inline_data_addr(dir, ipage);
 587
 588         err = do_convert_inline_dir(dir, ipage, inline_dentry);
 589         if (!err)
 590                 f2fs_put_page(ipage, 1);
 591 out_fname:
 592         f2fs_free_filename(&fname);
 593 out:
 594         f2fs_unlock_op(sbi);
 595         return err;
 596 }
 597
 598 int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname,
 599                           struct inode *inode, nid_t ino, umode_t mode)
 600 {
 601         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 602         struct page *ipage;
 603         unsigned int bit_pos;
 604         void *inline_dentry = NULL;
 605         struct f2fs_dentry_ptr d;
 606         int slots = GET_DENTRY_SLOTS(fname->disk_name.len);
 607         struct page *page = NULL;
 608         int err = 0;
 609
 610         ipage = f2fs_get_node_page(sbi, dir->i_ino);
 611         if (IS_ERR(ipage))
 612                 return PTR_ERR(ipage);
 613
 614         inline_dentry = inline_data_addr(dir, ipage);
 615         make_dentry_ptr_inline(dir, &d, inline_dentry);
 616
 617         bit_pos = f2fs_room_for_filename(d.bitmap, slots, d.max);
 618         if (bit_pos >= d.max) {
 619                 err = do_convert_inline_dir(dir, ipage, inline_dentry);
 620                 if (err)
 621                         return err;
 622                 err = -EAGAIN;
 623                 goto out;
 624         }
 625
 626         if (inode) {
 627                 down_write(&F2FS_I(inode)->i_sem);
 628                 page = f2fs_init_inode_metadata(inode, dir, fname, ipage);
 629                 if (IS_ERR(page)) {
 630                         err = PTR_ERR(page);
 631                         goto fail;
 632                 }
 633         }
 634
 635         f2fs_wait_on_page_writeback(ipage, NODE, true, true);
 636
 637         f2fs_update_dentry(ino, mode, &d, &fname->disk_name, fname->hash,
 638                            bit_pos);
 639
 640         set_page_dirty(ipage);
 641
 642         /* we don't need to mark_inode_dirty now */
 643         if (inode) {
 644                 f2fs_i_pino_write(inode, dir->i_ino);
 645
 646                 /* synchronize inode page's data from inode cache */
 647                 if (is_inode_flag_set(inode, FI_NEW_INODE))
 648                         f2fs_update_inode(inode, page);
 649
 650                 f2fs_put_page(page, 1);
 651         }
 652
 653         f2fs_update_parent_metadata(dir, inode, 0);
 654 fail:
 655         if (inode)
 656                 up_write(&F2FS_I(inode)->i_sem);
 657 out:
 658         f2fs_put_page(ipage, 1);
 659         return err;
 660 }
 661
 662 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
 663                                         struct inode *dir, struct inode *inode)
 664 {
 665         struct f2fs_dentry_ptr d;
 666         void *inline_dentry;
 667         int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
 668         unsigned int bit_pos;
 669         int i;
 670
 671         lock_page(page);
 672         f2fs_wait_on_page_writeback(page, NODE, true, true);
 673
 674         inline_dentry = inline_data_addr(dir, page);
 675         make_dentry_ptr_inline(dir, &d, inline_dentry);
 676
 677         bit_pos = dentry - d.dentry;
 678         for (i = 0; i < slots; i++)
 679                 __clear_bit_le(bit_pos + i, d.bitmap);
 680
 681         set_page_dirty(page);
 682         f2fs_put_page(page, 1);
 683
 684         dir->i_ctime = dir->i_mtime = current_time(dir);
 685         f2fs_mark_inode_dirty_sync(dir, false);
 686
 687         if (inode)
 688                 f2fs_drop_nlink(dir, inode);
 689 }
 690
 691 bool f2fs_empty_inline_dir(struct inode *dir)
 692 {
 693         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 694         struct page *ipage;
 695         unsigned int bit_pos = 2;
 696         void *inline_dentry;
 697         struct f2fs_dentry_ptr d;
 698
 699         ipage = f2fs_get_node_page(sbi, dir->i_ino);
 700         if (IS_ERR(ipage))
 701                 return false;
 702
 703         inline_dentry = inline_data_addr(dir, ipage);
 704         make_dentry_ptr_inline(dir, &d, inline_dentry);
 705
 706         bit_pos = find_next_bit_le(d.bitmap, d.max, bit_pos);
 707
 708         f2fs_put_page(ipage, 1);
 709
 710         if (bit_pos < d.max)
 711                 return false;
 712
 713         return true;
 714 }
 715
 716 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
 717                                 struct fscrypt_str *fstr)
 718 {
 719         struct inode *inode = file_inode(file);
 720         struct page *ipage = NULL;
 721         struct f2fs_dentry_ptr d;
 722         void *inline_dentry = NULL;
 723         int err;
 724
 725         make_dentry_ptr_inline(inode, &d, inline_dentry);
 726
 727         if (ctx->pos == d.max)
 728                 return 0;
 729
 730         ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
 731         if (IS_ERR(ipage))
 732                 return PTR_ERR(ipage);
 733
 734         /*
 735          * f2fs_readdir was protected by inode.i_rwsem, it is safe to access
 736          * ipage without page's lock held.
 737          */
 738         unlock_page(ipage);
 739
 740         inline_dentry = inline_data_addr(inode, ipage);
 741
 742         make_dentry_ptr_inline(inode, &d, inline_dentry);
 743
 744         err = f2fs_fill_dentries(ctx, &d, 0, fstr);
 745         if (!err)
 746                 ctx->pos = d.max;
 747
 748         f2fs_put_page(ipage, 0);
 749         return err < 0 ? err : 0;
 750 }
 751
 752 int f2fs_inline_data_fiemap(struct inode *inode,
 753                 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
 754 {
 755         __u64 byteaddr, ilen;
 756         __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
 757                 FIEMAP_EXTENT_LAST;
 758         struct node_info ni;
 759         struct page *ipage;
 760         int err = 0;
 761
 762         ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
 763         if (IS_ERR(ipage))
 764                 return PTR_ERR(ipage);
 765
 766         if ((S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 767                                 !f2fs_has_inline_data(inode)) {
 768                 err = -EAGAIN;
 769                 goto out;
 770         }
 771
 772         if (S_ISDIR(inode->i_mode) && !f2fs_has_inline_dentry(inode)) {
 773                 err = -EAGAIN;
 774                 goto out;
 775         }
 776
 777         ilen = min_t(size_t, MAX_INLINE_DATA(inode), i_size_read(inode));
 778         if (start >= ilen)
 779                 goto out;
 780         if (start + len < ilen)
 781                 ilen = start + len;
 782         ilen -= start;
 783
 784         err = f2fs_get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
 785         if (err)
 786                 goto out;
 787
 788         byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
 789         byteaddr += (char *)inline_data_addr(inode, ipage) -
 790                                         (char *)F2FS_INODE(ipage);
 791         err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
 792         trace_f2fs_fiemap(inode, start, byteaddr, ilen, flags, err);
 793 out:
 794         f2fs_put_page(ipage, 1);
 795         return err;
 796 }