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 static bool support_inline_data(struct inode *inode) 18 { 19 if (f2fs_is_atomic_file(inode)) 20 return false; 21 if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode)) 22 return false; 23 if (i_size_read(inode) > MAX_INLINE_DATA(inode)) 24 return false; 25 return true; 26 } 27 28 bool f2fs_may_inline_data(struct inode *inode) 29 { 30 if (!support_inline_data(inode)) 31 return false; 32 33 return !f2fs_post_read_required(inode); 34 } 35 36 bool f2fs_sanity_check_inline_data(struct inode *inode) 37 { 38 if (!f2fs_has_inline_data(inode)) 39 return false; 40 41 if (!support_inline_data(inode)) 42 return true; 43 44 /* 45 * used by sanity_check_inode(), when disk layout fields has not 46 * been synchronized to inmem fields. 47 */ 48 return (S_ISREG(inode->i_mode) && 49 (file_is_encrypt(inode) || file_is_verity(inode) || 50 (F2FS_I(inode)->i_flags & F2FS_COMPR_FL))); 51 } 52 53 bool f2fs_may_inline_dentry(struct inode *inode) 54 { 55 if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY)) 56 return false; 57 58 if (!S_ISDIR(inode->i_mode)) 59 return false; 60 61 return true; 62 } 63 64 void f2fs_do_read_inline_data(struct page *page, struct page *ipage) 65 { 66 struct inode *inode = page->mapping->host; 67 68 if (PageUptodate(page)) 69 return; 70 71 f2fs_bug_on(F2FS_P_SB(page), page->index); 72 73 zero_user_segment(page, MAX_INLINE_DATA(inode), PAGE_SIZE); 74 75 /* Copy the whole inline data block */ 76 memcpy_to_page(page, 0, inline_data_addr(inode, ipage), 77 MAX_INLINE_DATA(inode)); 78 if (!PageUptodate(page)) 79 SetPageUptodate(page); 80 } 81 82 void f2fs_truncate_inline_inode(struct inode *inode, 83 struct page *ipage, u64 from) 84 { 85 void *addr; 86 87 if (from >= MAX_INLINE_DATA(inode)) 88 return; 89 90 addr = inline_data_addr(inode, ipage); 91 92 f2fs_wait_on_page_writeback(ipage, NODE, true, true); 93 memset(addr + from, 0, MAX_INLINE_DATA(inode) - from); 94 set_page_dirty(ipage); 95 96 if (from == 0) 97 clear_inode_flag(inode, FI_DATA_EXIST); 98 } 99 100 int f2fs_read_inline_data(struct inode *inode, struct page *page) 101 { 102 struct page *ipage; 103 104 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino); 105 if (IS_ERR(ipage)) { 106 unlock_page(page); 107 return PTR_ERR(ipage); 108 } 109 110 if (!f2fs_has_inline_data(inode)) { 111 f2fs_put_page(ipage, 1); 112 return -EAGAIN; 113 } 114 115 if (page->index) 116 zero_user_segment(page, 0, PAGE_SIZE); 117 else 118 f2fs_do_read_inline_data(page, ipage); 119 120 if (!PageUptodate(page)) 121 SetPageUptodate(page); 122 f2fs_put_page(ipage, 1); 123 unlock_page(page); 124 return 0; 125 } 126 127 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page) 128 { 129 struct f2fs_io_info fio = { 130 .sbi = F2FS_I_SB(dn->inode), 131 .ino = dn->inode->i_ino, 132 .type = DATA, 133 .op = REQ_OP_WRITE, 134 .op_flags = REQ_SYNC | REQ_PRIO, 135 .page = page, 136 .encrypted_page = NULL, 137 .io_type = FS_DATA_IO, 138 }; 139 struct node_info ni; 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 err = f2fs_get_node_info(fio.sbi, dn->nid, &ni, false); 150 if (err) { 151 f2fs_truncate_data_blocks_range(dn, 1); 152 f2fs_put_dnode(dn); 153 return err; 154 } 155 156 fio.version = ni.version; 157 158 if (unlikely(dn->data_blkaddr != NEW_ADDR)) { 159 f2fs_put_dnode(dn); 160 set_sbi_flag(fio.sbi, SBI_NEED_FSCK); 161 f2fs_warn(fio.sbi, "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.", 162 __func__, dn->inode->i_ino, dn->data_blkaddr); 163 f2fs_handle_error(fio.sbi, ERROR_INVALID_BLKADDR); 164 return -EFSCORRUPTED; 165 } 166 167 f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page)); 168 169 f2fs_do_read_inline_data(page, dn->inode_page); 170 set_page_dirty(page); 171 172 /* clear dirty state */ 173 dirty = clear_page_dirty_for_io(page); 174 175 /* write data page to try to make data consistent */ 176 set_page_writeback(page); 177 fio.old_blkaddr = dn->data_blkaddr; 178 set_inode_flag(dn->inode, FI_HOT_DATA); 179 f2fs_outplace_write_data(dn, &fio); 180 f2fs_wait_on_page_writeback(page, DATA, true, true); 181 if (dirty) { 182 inode_dec_dirty_pages(dn->inode); 183 f2fs_remove_dirty_inode(dn->inode); 184 } 185 186 /* this converted inline_data should be recovered. */ 187 set_inode_flag(dn->inode, FI_APPEND_WRITE); 188 189 /* clear inline data and flag after data writeback */ 190 f2fs_truncate_inline_inode(dn->inode, dn->inode_page, 0); 191 clear_page_private_inline(dn->inode_page); 192 clear_out: 193 stat_dec_inline_inode(dn->inode); 194 clear_inode_flag(dn->inode, FI_INLINE_DATA); 195 f2fs_put_dnode(dn); 196 return 0; 197 } 198 199 int f2fs_convert_inline_inode(struct inode *inode) 200 { 201 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 202 struct dnode_of_data dn; 203 struct page *ipage, *page; 204 int err = 0; 205 206 if (!f2fs_has_inline_data(inode) || 207 f2fs_hw_is_readonly(sbi) || f2fs_readonly(sbi->sb)) 208 return 0; 209 210 err = f2fs_dquot_initialize(inode); 211 if (err) 212 return err; 213 214 page = f2fs_grab_cache_page(inode->i_mapping, 0, false); 215 if (!page) 216 return -ENOMEM; 217 218 f2fs_lock_op(sbi); 219 220 ipage = f2fs_get_node_page(sbi, inode->i_ino); 221 if (IS_ERR(ipage)) { 222 err = PTR_ERR(ipage); 223 goto out; 224 } 225 226 set_new_dnode(&dn, inode, ipage, ipage, 0); 227 228 if (f2fs_has_inline_data(inode)) 229 err = f2fs_convert_inline_page(&dn, page); 230 231 f2fs_put_dnode(&dn); 232 out: 233 f2fs_unlock_op(sbi); 234 235 f2fs_put_page(page, 1); 236 237 if (!err) 238 f2fs_balance_fs(sbi, dn.node_changed); 239 240 return err; 241 } 242 243 int f2fs_write_inline_data(struct inode *inode, struct page *page) 244 { 245 struct dnode_of_data dn; 246 int err; 247 248 set_new_dnode(&dn, inode, NULL, NULL, 0); 249 err = f2fs_get_dnode_of_data(&dn, 0, LOOKUP_NODE); 250 if (err) 251 return err; 252 253 if (!f2fs_has_inline_data(inode)) { 254 f2fs_put_dnode(&dn); 255 return -EAGAIN; 256 } 257 258 f2fs_bug_on(F2FS_I_SB(inode), page->index); 259 260 f2fs_wait_on_page_writeback(dn.inode_page, NODE, true, true); 261 memcpy_from_page(inline_data_addr(inode, dn.inode_page), 262 page, 0, MAX_INLINE_DATA(inode)); 263 set_page_dirty(dn.inode_page); 264 265 f2fs_clear_page_cache_dirty_tag(page); 266 267 set_inode_flag(inode, FI_APPEND_WRITE); 268 set_inode_flag(inode, FI_DATA_EXIST); 269 270 clear_page_private_inline(dn.inode_page); 271 f2fs_put_dnode(&dn); 272 return 0; 273 } 274 275 int f2fs_recover_inline_data(struct inode *inode, struct page *npage) 276 { 277 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 278 struct f2fs_inode *ri = NULL; 279 void *src_addr, *dst_addr; 280 struct page *ipage; 281 282 /* 283 * The inline_data recovery policy is as follows. 284 * [prev.] [next] of inline_data flag 285 * o o -> recover inline_data 286 * o x -> remove inline_data, and then recover data blocks 287 * x o -> remove data blocks, and then recover inline_data 288 * x x -> recover data blocks 289 */ 290 if (IS_INODE(npage)) 291 ri = F2FS_INODE(npage); 292 293 if (f2fs_has_inline_data(inode) && 294 ri && (ri->i_inline & F2FS_INLINE_DATA)) { 295 process_inline: 296 ipage = f2fs_get_node_page(sbi, inode->i_ino); 297 if (IS_ERR(ipage)) 298 return PTR_ERR(ipage); 299 300 f2fs_wait_on_page_writeback(ipage, NODE, true, true); 301 302 src_addr = inline_data_addr(inode, npage); 303 dst_addr = inline_data_addr(inode, ipage); 304 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode)); 305 306 set_inode_flag(inode, FI_INLINE_DATA); 307 set_inode_flag(inode, FI_DATA_EXIST); 308 309 set_page_dirty(ipage); 310 f2fs_put_page(ipage, 1); 311 return 1; 312 } 313 314 if (f2fs_has_inline_data(inode)) { 315 ipage = f2fs_get_node_page(sbi, inode->i_ino); 316 if (IS_ERR(ipage)) 317 return PTR_ERR(ipage); 318 f2fs_truncate_inline_inode(inode, ipage, 0); 319 stat_dec_inline_inode(inode); 320 clear_inode_flag(inode, FI_INLINE_DATA); 321 f2fs_put_page(ipage, 1); 322 } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) { 323 int ret; 324 325 ret = f2fs_truncate_blocks(inode, 0, false); 326 if (ret) 327 return ret; 328 stat_inc_inline_inode(inode); 329 goto process_inline; 330 } 331 return 0; 332 } 333 334 struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir, 335 const struct f2fs_filename *fname, 336 struct page **res_page) 337 { 338 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); 339 struct f2fs_dir_entry *de; 340 struct f2fs_dentry_ptr d; 341 struct page *ipage; 342 void *inline_dentry; 343 344 ipage = f2fs_get_node_page(sbi, dir->i_ino); 345 if (IS_ERR(ipage)) { 346 *res_page = ipage; 347 return NULL; 348 } 349 350 inline_dentry = inline_data_addr(dir, ipage); 351 352 make_dentry_ptr_inline(dir, &d, inline_dentry); 353 de = f2fs_find_target_dentry(&d, fname, NULL); 354 unlock_page(ipage); 355 if (IS_ERR(de)) { 356 *res_page = ERR_CAST(de); 357 de = NULL; 358 } 359 if (de) 360 *res_page = ipage; 361 else 362 f2fs_put_page(ipage, 0); 363 364 return de; 365 } 366 367 int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent, 368 struct page *ipage) 369 { 370 struct f2fs_dentry_ptr d; 371 void *inline_dentry; 372 373 inline_dentry = inline_data_addr(inode, ipage); 374 375 make_dentry_ptr_inline(inode, &d, inline_dentry); 376 f2fs_do_make_empty_dir(inode, parent, &d); 377 378 set_page_dirty(ipage); 379 380 /* update i_size to MAX_INLINE_DATA */ 381 if (i_size_read(inode) < MAX_INLINE_DATA(inode)) 382 f2fs_i_size_write(inode, MAX_INLINE_DATA(inode)); 383 return 0; 384 } 385 386 /* 387 * NOTE: ipage is grabbed by caller, but if any error occurs, we should 388 * release ipage in this function. 389 */ 390 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage, 391 void *inline_dentry) 392 { 393 struct page *page; 394 struct dnode_of_data dn; 395 struct f2fs_dentry_block *dentry_blk; 396 struct f2fs_dentry_ptr src, dst; 397 int err; 398 399 page = f2fs_grab_cache_page(dir->i_mapping, 0, true); 400 if (!page) { 401 f2fs_put_page(ipage, 1); 402 return -ENOMEM; 403 } 404 405 set_new_dnode(&dn, dir, ipage, NULL, 0); 406 err = f2fs_reserve_block(&dn, 0); 407 if (err) 408 goto out; 409 410 if (unlikely(dn.data_blkaddr != NEW_ADDR)) { 411 f2fs_put_dnode(&dn); 412 set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK); 413 f2fs_warn(F2FS_P_SB(page), "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.", 414 __func__, dir->i_ino, dn.data_blkaddr); 415 f2fs_handle_error(F2FS_P_SB(page), ERROR_INVALID_BLKADDR); 416 err = -EFSCORRUPTED; 417 goto out; 418 } 419 420 f2fs_wait_on_page_writeback(page, DATA, true, true); 421 422 dentry_blk = page_address(page); 423 424 /* 425 * Start by zeroing the full block, to ensure that all unused space is 426 * zeroed and no uninitialized memory is leaked to disk. 427 */ 428 memset(dentry_blk, 0, F2FS_BLKSIZE); 429 430 make_dentry_ptr_inline(dir, &src, inline_dentry); 431 make_dentry_ptr_block(dir, &dst, dentry_blk); 432 433 /* copy data from inline dentry block to new dentry block */ 434 memcpy(dst.bitmap, src.bitmap, src.nr_bitmap); 435 memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max); 436 memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN); 437 438 if (!PageUptodate(page)) 439 SetPageUptodate(page); 440 set_page_dirty(page); 441 442 /* clear inline dir and flag after data writeback */ 443 f2fs_truncate_inline_inode(dir, ipage, 0); 444 445 stat_dec_inline_dir(dir); 446 clear_inode_flag(dir, FI_INLINE_DENTRY); 447 448 /* 449 * should retrieve reserved space which was used to keep 450 * inline_dentry's structure for backward compatibility. 451 */ 452 if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) && 453 !f2fs_has_inline_xattr(dir)) 454 F2FS_I(dir)->i_inline_xattr_size = 0; 455 456 f2fs_i_depth_write(dir, 1); 457 if (i_size_read(dir) < PAGE_SIZE) 458 f2fs_i_size_write(dir, PAGE_SIZE); 459 out: 460 f2fs_put_page(page, 1); 461 return err; 462 } 463 464 static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry) 465 { 466 struct f2fs_dentry_ptr d; 467 unsigned long bit_pos = 0; 468 int err = 0; 469 470 make_dentry_ptr_inline(dir, &d, inline_dentry); 471 472 while (bit_pos < d.max) { 473 struct f2fs_dir_entry *de; 474 struct f2fs_filename fname; 475 nid_t ino; 476 umode_t fake_mode; 477 478 if (!test_bit_le(bit_pos, d.bitmap)) { 479 bit_pos++; 480 continue; 481 } 482 483 de = &d.dentry[bit_pos]; 484 485 if (unlikely(!de->name_len)) { 486 bit_pos++; 487 continue; 488 } 489 490 /* 491 * We only need the disk_name and hash to move the dentry. 492 * We don't need the original or casefolded filenames. 493 */ 494 memset(&fname, 0, sizeof(fname)); 495 fname.disk_name.name = d.filename[bit_pos]; 496 fname.disk_name.len = le16_to_cpu(de->name_len); 497 fname.hash = de->hash_code; 498 499 ino = le32_to_cpu(de->ino); 500 fake_mode = f2fs_get_de_type(de) << S_SHIFT; 501 502 err = f2fs_add_regular_entry(dir, &fname, NULL, ino, fake_mode); 503 if (err) 504 goto punch_dentry_pages; 505 506 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); 507 } 508 return 0; 509 punch_dentry_pages: 510 truncate_inode_pages(&dir->i_data, 0); 511 f2fs_truncate_blocks(dir, 0, false); 512 f2fs_remove_dirty_inode(dir); 513 return err; 514 } 515 516 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage, 517 void *inline_dentry) 518 { 519 void *backup_dentry; 520 int err; 521 522 backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir), 523 MAX_INLINE_DATA(dir), GFP_F2FS_ZERO); 524 if (!backup_dentry) { 525 f2fs_put_page(ipage, 1); 526 return -ENOMEM; 527 } 528 529 memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA(dir)); 530 f2fs_truncate_inline_inode(dir, ipage, 0); 531 532 unlock_page(ipage); 533 534 err = f2fs_add_inline_entries(dir, backup_dentry); 535 if (err) 536 goto recover; 537 538 lock_page(ipage); 539 540 stat_dec_inline_dir(dir); 541 clear_inode_flag(dir, FI_INLINE_DENTRY); 542 543 /* 544 * should retrieve reserved space which was used to keep 545 * inline_dentry's structure for backward compatibility. 546 */ 547 if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) && 548 !f2fs_has_inline_xattr(dir)) 549 F2FS_I(dir)->i_inline_xattr_size = 0; 550 551 kfree(backup_dentry); 552 return 0; 553 recover: 554 lock_page(ipage); 555 f2fs_wait_on_page_writeback(ipage, NODE, true, true); 556 memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir)); 557 f2fs_i_depth_write(dir, 0); 558 f2fs_i_size_write(dir, MAX_INLINE_DATA(dir)); 559 set_page_dirty(ipage); 560 f2fs_put_page(ipage, 1); 561 562 kfree(backup_dentry); 563 return err; 564 } 565 566 static int do_convert_inline_dir(struct inode *dir, struct page *ipage, 567 void *inline_dentry) 568 { 569 if (!F2FS_I(dir)->i_dir_level) 570 return f2fs_move_inline_dirents(dir, ipage, inline_dentry); 571 else 572 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry); 573 } 574 575 int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry) 576 { 577 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 578 struct page *ipage; 579 struct f2fs_filename fname; 580 void *inline_dentry = NULL; 581 int err = 0; 582 583 if (!f2fs_has_inline_dentry(dir)) 584 return 0; 585 586 f2fs_lock_op(sbi); 587 588 err = f2fs_setup_filename(dir, &dentry->d_name, 0, &fname); 589 if (err) 590 goto out; 591 592 ipage = f2fs_get_node_page(sbi, dir->i_ino); 593 if (IS_ERR(ipage)) { 594 err = PTR_ERR(ipage); 595 goto out_fname; 596 } 597 598 if (f2fs_has_enough_room(dir, ipage, &fname)) { 599 f2fs_put_page(ipage, 1); 600 goto out_fname; 601 } 602 603 inline_dentry = inline_data_addr(dir, ipage); 604 605 err = do_convert_inline_dir(dir, ipage, inline_dentry); 606 if (!err) 607 f2fs_put_page(ipage, 1); 608 out_fname: 609 f2fs_free_filename(&fname); 610 out: 611 f2fs_unlock_op(sbi); 612 return err; 613 } 614 615 int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname, 616 struct inode *inode, nid_t ino, umode_t mode) 617 { 618 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 619 struct page *ipage; 620 unsigned int bit_pos; 621 void *inline_dentry = NULL; 622 struct f2fs_dentry_ptr d; 623 int slots = GET_DENTRY_SLOTS(fname->disk_name.len); 624 struct page *page = NULL; 625 int err = 0; 626 627 ipage = f2fs_get_node_page(sbi, dir->i_ino); 628 if (IS_ERR(ipage)) 629 return PTR_ERR(ipage); 630 631 inline_dentry = inline_data_addr(dir, ipage); 632 make_dentry_ptr_inline(dir, &d, inline_dentry); 633 634 bit_pos = f2fs_room_for_filename(d.bitmap, slots, d.max); 635 if (bit_pos >= d.max) { 636 err = do_convert_inline_dir(dir, ipage, inline_dentry); 637 if (err) 638 return err; 639 err = -EAGAIN; 640 goto out; 641 } 642 643 if (inode) { 644 f2fs_down_write(&F2FS_I(inode)->i_sem); 645 page = f2fs_init_inode_metadata(inode, dir, fname, ipage); 646 if (IS_ERR(page)) { 647 err = PTR_ERR(page); 648 goto fail; 649 } 650 } 651 652 f2fs_wait_on_page_writeback(ipage, NODE, true, true); 653 654 f2fs_update_dentry(ino, mode, &d, &fname->disk_name, fname->hash, 655 bit_pos); 656 657 set_page_dirty(ipage); 658 659 /* we don't need to mark_inode_dirty now */ 660 if (inode) { 661 f2fs_i_pino_write(inode, dir->i_ino); 662 663 /* synchronize inode page's data from inode cache */ 664 if (is_inode_flag_set(inode, FI_NEW_INODE)) 665 f2fs_update_inode(inode, page); 666 667 f2fs_put_page(page, 1); 668 } 669 670 f2fs_update_parent_metadata(dir, inode, 0); 671 fail: 672 if (inode) 673 f2fs_up_write(&F2FS_I(inode)->i_sem); 674 out: 675 f2fs_put_page(ipage, 1); 676 return err; 677 } 678 679 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page, 680 struct inode *dir, struct inode *inode) 681 { 682 struct f2fs_dentry_ptr d; 683 void *inline_dentry; 684 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len)); 685 unsigned int bit_pos; 686 int i; 687 688 lock_page(page); 689 f2fs_wait_on_page_writeback(page, NODE, true, true); 690 691 inline_dentry = inline_data_addr(dir, page); 692 make_dentry_ptr_inline(dir, &d, inline_dentry); 693 694 bit_pos = dentry - d.dentry; 695 for (i = 0; i < slots; i++) 696 __clear_bit_le(bit_pos + i, d.bitmap); 697 698 set_page_dirty(page); 699 f2fs_put_page(page, 1); 700 701 dir->i_ctime = dir->i_mtime = current_time(dir); 702 f2fs_mark_inode_dirty_sync(dir, false); 703 704 if (inode) 705 f2fs_drop_nlink(dir, inode); 706 } 707 708 bool f2fs_empty_inline_dir(struct inode *dir) 709 { 710 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 711 struct page *ipage; 712 unsigned int bit_pos = 2; 713 void *inline_dentry; 714 struct f2fs_dentry_ptr d; 715 716 ipage = f2fs_get_node_page(sbi, dir->i_ino); 717 if (IS_ERR(ipage)) 718 return false; 719 720 inline_dentry = inline_data_addr(dir, ipage); 721 make_dentry_ptr_inline(dir, &d, inline_dentry); 722 723 bit_pos = find_next_bit_le(d.bitmap, d.max, bit_pos); 724 725 f2fs_put_page(ipage, 1); 726 727 if (bit_pos < d.max) 728 return false; 729 730 return true; 731 } 732 733 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx, 734 struct fscrypt_str *fstr) 735 { 736 struct inode *inode = file_inode(file); 737 struct page *ipage = NULL; 738 struct f2fs_dentry_ptr d; 739 void *inline_dentry = NULL; 740 int err; 741 742 make_dentry_ptr_inline(inode, &d, inline_dentry); 743 744 if (ctx->pos == d.max) 745 return 0; 746 747 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino); 748 if (IS_ERR(ipage)) 749 return PTR_ERR(ipage); 750 751 /* 752 * f2fs_readdir was protected by inode.i_rwsem, it is safe to access 753 * ipage without page's lock held. 754 */ 755 unlock_page(ipage); 756 757 inline_dentry = inline_data_addr(inode, ipage); 758 759 make_dentry_ptr_inline(inode, &d, inline_dentry); 760 761 err = f2fs_fill_dentries(ctx, &d, 0, fstr); 762 if (!err) 763 ctx->pos = d.max; 764 765 f2fs_put_page(ipage, 0); 766 return err < 0 ? err : 0; 767 } 768 769 int f2fs_inline_data_fiemap(struct inode *inode, 770 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len) 771 { 772 __u64 byteaddr, ilen; 773 __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED | 774 FIEMAP_EXTENT_LAST; 775 struct node_info ni; 776 struct page *ipage; 777 int err = 0; 778 779 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino); 780 if (IS_ERR(ipage)) 781 return PTR_ERR(ipage); 782 783 if ((S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) && 784 !f2fs_has_inline_data(inode)) { 785 err = -EAGAIN; 786 goto out; 787 } 788 789 if (S_ISDIR(inode->i_mode) && !f2fs_has_inline_dentry(inode)) { 790 err = -EAGAIN; 791 goto out; 792 } 793 794 ilen = min_t(size_t, MAX_INLINE_DATA(inode), i_size_read(inode)); 795 if (start >= ilen) 796 goto out; 797 if (start + len < ilen) 798 ilen = start + len; 799 ilen -= start; 800 801 err = f2fs_get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni, false); 802 if (err) 803 goto out; 804 805 byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits; 806 byteaddr += (char *)inline_data_addr(inode, ipage) - 807 (char *)F2FS_INODE(ipage); 808 err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags); 809 trace_f2fs_fiemap(inode, start, byteaddr, ilen, flags, err); 810 out: 811 f2fs_put_page(ipage, 1); 812 return err; 813 } 814