1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * fs/f2fs/data.c 4 * 5 * Copyright (c) 2012 Samsung Electronics Co., Ltd. 6 * http://www.samsung.com/ 7 */ 8 #include <linux/fs.h> 9 #include <linux/f2fs_fs.h> 10 #include <linux/sched/mm.h> 11 #include <linux/mpage.h> 12 #include <linux/writeback.h> 13 #include <linux/folio_batch.h> 14 #include <linux/blkdev.h> 15 #include <linux/bio.h> 16 #include <linux/blk-crypto.h> 17 #include <linux/swap.h> 18 #include <linux/prefetch.h> 19 #include <linux/uio.h> 20 #include <linux/sched/signal.h> 21 #include <linux/fiemap.h> 22 #include <linux/iomap.h> 23 #include <linux/fserror.h> 24 25 #include "f2fs.h" 26 #include "node.h" 27 #include "segment.h" 28 #include "iostat.h" 29 #include <trace/events/f2fs.h> 30 31 #define NUM_PREALLOC_POST_READ_CTXS 128 32 33 static struct kmem_cache *bio_post_read_ctx_cache; 34 static struct kmem_cache *bio_entry_slab; 35 static struct kmem_cache *ffs_entry_slab; 36 static mempool_t *bio_post_read_ctx_pool; 37 static struct bio_set f2fs_bioset; 38 39 struct f2fs_folio_state { 40 spinlock_t state_lock; 41 unsigned int read_pages_pending; 42 }; 43 44 struct f2fs_bio { 45 struct work_struct work; 46 struct bio bio; 47 }; 48 49 #define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE 50 51 int __init f2fs_init_bioset(void) 52 { 53 return bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE, 54 offsetof(struct f2fs_bio, bio), BIOSET_NEED_BVECS); 55 } 56 57 void f2fs_destroy_bioset(void) 58 { 59 bioset_exit(&f2fs_bioset); 60 } 61 62 bool f2fs_is_cp_guaranteed(const struct folio *folio) 63 { 64 struct address_space *mapping = folio->mapping; 65 struct inode *inode; 66 struct f2fs_sb_info *sbi; 67 68 if (fscrypt_is_bounce_folio(folio)) 69 return folio_test_f2fs_gcing(fscrypt_pagecache_folio(folio)); 70 71 inode = mapping->host; 72 sbi = F2FS_I_SB(inode); 73 74 if (inode->i_ino == F2FS_META_INO(sbi) || 75 inode->i_ino == F2FS_NODE_INO(sbi) || 76 S_ISDIR(inode->i_mode)) 77 return true; 78 79 if ((S_ISREG(inode->i_mode) && IS_NOQUOTA(inode)) || 80 folio_test_f2fs_gcing(folio)) 81 return true; 82 return false; 83 } 84 85 static enum count_type __read_io_type(struct folio *folio) 86 { 87 struct address_space *mapping = folio->mapping; 88 89 if (mapping) { 90 struct inode *inode = mapping->host; 91 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 92 93 if (inode->i_ino == F2FS_META_INO(sbi)) 94 return F2FS_RD_META; 95 96 if (inode->i_ino == F2FS_NODE_INO(sbi)) 97 return F2FS_RD_NODE; 98 } 99 return F2FS_RD_DATA; 100 } 101 102 /* postprocessing steps for read bios */ 103 enum bio_post_read_step { 104 #ifdef CONFIG_FS_ENCRYPTION 105 STEP_DECRYPT = BIT(0), 106 #else 107 STEP_DECRYPT = 0, /* compile out the decryption-related code */ 108 #endif 109 #ifdef CONFIG_F2FS_FS_COMPRESSION 110 STEP_DECOMPRESS = BIT(1), 111 #else 112 STEP_DECOMPRESS = 0, /* compile out the decompression-related code */ 113 #endif 114 #ifdef CONFIG_FS_VERITY 115 STEP_VERITY = BIT(2), 116 #else 117 STEP_VERITY = 0, /* compile out the verity-related code */ 118 #endif 119 }; 120 121 struct bio_post_read_ctx { 122 struct bio *bio; 123 struct f2fs_sb_info *sbi; 124 struct fsverity_info *vi; 125 struct work_struct work; 126 unsigned int enabled_steps; 127 /* 128 * decompression_attempted keeps track of whether 129 * f2fs_end_read_compressed_page() has been called on the pages in the 130 * bio that belong to a compressed cluster yet. 131 */ 132 bool decompression_attempted; 133 block_t fs_blkaddr; 134 }; 135 136 /* 137 * Update and unlock a bio's pages, and free the bio. 138 * 139 * This marks pages up-to-date only if there was no error in the bio (I/O error, 140 * decryption error, or verity error), as indicated by bio->bi_status. 141 * 142 * "Compressed pages" (pagecache pages backed by a compressed cluster on-disk) 143 * aren't marked up-to-date here, as decompression is done on a per-compression- 144 * cluster basis rather than a per-bio basis. Instead, we only must do two 145 * things for each compressed page here: call f2fs_end_read_compressed_page() 146 * with failed=true if an error occurred before it would have normally gotten 147 * called (i.e., I/O error or decryption error, but *not* verity error), and 148 * release the bio's reference to the decompress_io_ctx of the page's cluster. 149 */ 150 static void f2fs_finish_read_bio(struct bio *bio, bool in_task) 151 { 152 struct folio_iter fi; 153 struct bio_post_read_ctx *ctx = bio->bi_private; 154 unsigned long flags; 155 156 bio_for_each_folio_all(fi, bio) { 157 struct folio *folio = fi.folio; 158 unsigned nr_pages = fi.length >> PAGE_SHIFT; 159 bool finished = true; 160 161 if (!folio_test_large(folio) && 162 f2fs_is_compressed_page(folio)) { 163 if (ctx && !ctx->decompression_attempted) 164 f2fs_end_read_compressed_page(folio, true, 0, 165 in_task); 166 f2fs_put_folio_dic(folio, in_task); 167 continue; 168 } 169 170 if (folio_test_large(folio)) { 171 struct f2fs_folio_state *ffs = folio->private; 172 173 spin_lock_irqsave(&ffs->state_lock, flags); 174 ffs->read_pages_pending -= nr_pages; 175 finished = !ffs->read_pages_pending; 176 spin_unlock_irqrestore(&ffs->state_lock, flags); 177 } 178 179 while (nr_pages--) 180 dec_page_count(F2FS_F_SB(folio), __read_io_type(folio)); 181 182 if (bio->bi_status == BLK_STS_OK && 183 F2FS_F_SB(folio)->node_inode && is_node_folio(folio) && 184 f2fs_sanity_check_node_footer(F2FS_F_SB(folio), 185 folio, folio->index, NODE_TYPE_REGULAR, true)) 186 bio->bi_status = BLK_STS_IOERR; 187 188 if (finished) 189 folio_end_read(folio, bio->bi_status == BLK_STS_OK); 190 } 191 192 if (ctx) 193 mempool_free(ctx, bio_post_read_ctx_pool); 194 bio_put(bio); 195 } 196 197 static void f2fs_verify_bio(struct work_struct *work) 198 { 199 struct bio_post_read_ctx *ctx = 200 container_of(work, struct bio_post_read_ctx, work); 201 struct bio *bio = ctx->bio; 202 bool may_have_compressed_pages = (ctx->enabled_steps & STEP_DECOMPRESS); 203 struct fsverity_info *vi = ctx->vi; 204 205 /* 206 * fsverity_verify_bio() may call readahead() again, and while verity 207 * will be disabled for this, decryption and/or decompression may still 208 * be needed, resulting in another bio_post_read_ctx being allocated. 209 * So to prevent deadlocks we need to release the current ctx to the 210 * mempool first. This assumes that verity is the last post-read step. 211 */ 212 mempool_free(ctx, bio_post_read_ctx_pool); 213 bio->bi_private = NULL; 214 215 /* 216 * Verify the bio's pages with fs-verity. Exclude compressed pages, 217 * as those were handled separately by f2fs_end_read_compressed_page(). 218 */ 219 if (may_have_compressed_pages) { 220 struct folio_iter fi; 221 222 bio_for_each_folio_all(fi, bio) { 223 struct folio *folio = fi.folio; 224 225 if (!f2fs_is_compressed_page(folio) && 226 !fsverity_verify_folio(vi, folio)) { 227 bio->bi_status = BLK_STS_IOERR; 228 break; 229 } 230 } 231 } else { 232 fsverity_verify_bio(vi, bio); 233 } 234 235 f2fs_finish_read_bio(bio, true); 236 } 237 238 /* 239 * If the bio's data needs to be verified with fs-verity, then enqueue the 240 * verity work for the bio. Otherwise finish the bio now. 241 * 242 * Note that to avoid deadlocks, the verity work can't be done on the 243 * decryption/decompression workqueue. This is because verifying the data pages 244 * can involve reading verity metadata pages from the file, and these verity 245 * metadata pages may be encrypted and/or compressed. 246 */ 247 static void f2fs_verify_and_finish_bio(struct bio *bio, bool in_task) 248 { 249 struct bio_post_read_ctx *ctx = bio->bi_private; 250 251 if (ctx && (ctx->enabled_steps & STEP_VERITY)) { 252 INIT_WORK(&ctx->work, f2fs_verify_bio); 253 fsverity_enqueue_verify_work(&ctx->work); 254 } else { 255 f2fs_finish_read_bio(bio, in_task); 256 } 257 } 258 259 /* 260 * Handle STEP_DECOMPRESS by decompressing any compressed clusters whose last 261 * remaining page was read by @ctx->bio. 262 * 263 * Note that a bio may span clusters (even a mix of compressed and uncompressed 264 * clusters) or be for just part of a cluster. STEP_DECOMPRESS just indicates 265 * that the bio includes at least one compressed page. The actual decompression 266 * is done on a per-cluster basis, not a per-bio basis. 267 */ 268 static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx, 269 bool in_task) 270 { 271 struct folio_iter fi; 272 bool all_compressed = true; 273 block_t blkaddr = ctx->fs_blkaddr; 274 275 bio_for_each_folio_all(fi, ctx->bio) { 276 struct folio *folio = fi.folio; 277 278 if (f2fs_is_compressed_page(folio)) 279 f2fs_end_read_compressed_page(folio, false, blkaddr, 280 in_task); 281 else 282 all_compressed = false; 283 284 blkaddr++; 285 } 286 287 ctx->decompression_attempted = true; 288 289 /* 290 * Optimization: if all the bio's pages are compressed, then scheduling 291 * the per-bio verity work is unnecessary, as verity will be fully 292 * handled at the compression cluster level. 293 */ 294 if (all_compressed) 295 ctx->enabled_steps &= ~STEP_VERITY; 296 } 297 298 static void f2fs_post_read_work(struct work_struct *work) 299 { 300 struct bio_post_read_ctx *ctx = 301 container_of(work, struct bio_post_read_ctx, work); 302 struct bio *bio = ctx->bio; 303 304 if ((ctx->enabled_steps & STEP_DECRYPT) && !fscrypt_decrypt_bio(bio)) { 305 f2fs_finish_read_bio(bio, true); 306 return; 307 } 308 309 if (ctx->enabled_steps & STEP_DECOMPRESS) 310 f2fs_handle_step_decompress(ctx, true); 311 312 f2fs_verify_and_finish_bio(bio, true); 313 } 314 315 static void f2fs_read_end_io(struct bio *bio) 316 { 317 struct f2fs_sb_info *sbi = F2FS_F_SB(bio_first_folio_all(bio)); 318 struct bio_post_read_ctx *ctx; 319 bool intask = in_task() && !irqs_disabled(); 320 321 iostat_update_and_unbind_ctx(bio); 322 ctx = bio->bi_private; 323 324 if (time_to_inject(sbi, FAULT_READ_IO)) 325 bio->bi_status = BLK_STS_IOERR; 326 327 if (bio->bi_status != BLK_STS_OK) { 328 f2fs_finish_read_bio(bio, intask); 329 return; 330 } 331 332 if (ctx) { 333 unsigned int enabled_steps = ctx->enabled_steps & 334 (STEP_DECRYPT | STEP_DECOMPRESS); 335 336 /* 337 * If we have only decompression step between decompression and 338 * decrypt, we don't need post processing for this. 339 */ 340 if (enabled_steps == STEP_DECOMPRESS && 341 !f2fs_low_mem_mode(sbi)) { 342 f2fs_handle_step_decompress(ctx, intask); 343 } else if (enabled_steps) { 344 INIT_WORK(&ctx->work, f2fs_post_read_work); 345 queue_work(ctx->sbi->wq, &ctx->work); 346 return; 347 } 348 } 349 350 f2fs_verify_and_finish_bio(bio, intask); 351 } 352 353 static void f2fs_write_end_bio(struct bio *bio) 354 { 355 struct f2fs_sb_info *sbi = bio->bi_private; 356 struct folio_iter fi; 357 358 if (time_to_inject(sbi, FAULT_WRITE_IO)) 359 bio->bi_status = BLK_STS_IOERR; 360 361 bio_for_each_folio_all(fi, bio) { 362 struct folio *folio = fi.folio; 363 enum count_type type; 364 365 if (fscrypt_is_bounce_folio(folio)) { 366 struct folio *io_folio = folio; 367 368 folio = fscrypt_pagecache_folio(io_folio); 369 fscrypt_free_bounce_page(&io_folio->page); 370 } 371 372 #ifdef CONFIG_F2FS_FS_COMPRESSION 373 if (f2fs_is_compressed_page(folio)) { 374 f2fs_compress_write_end_io(bio, folio); 375 continue; 376 } 377 #endif 378 379 type = WB_DATA_TYPE(folio, false); 380 381 if (unlikely(bio->bi_status != BLK_STS_OK)) { 382 mapping_set_error(folio->mapping, -EIO); 383 if (type == F2FS_WB_CP_DATA) { 384 f2fs_stop_checkpoint(sbi, true, 385 STOP_CP_REASON_WRITE_FAIL); 386 } 387 } 388 389 if (is_node_folio(folio)) { 390 f2fs_sanity_check_node_footer(sbi, folio, 391 folio->index, NODE_TYPE_REGULAR, true); 392 f2fs_bug_on(sbi, folio->index != nid_of_node(folio)); 393 } 394 if (f2fs_in_warm_node_list(folio)) 395 f2fs_del_fsync_node_entry(sbi, folio); 396 397 dec_page_count(sbi, type); 398 399 /* 400 * we should access sbi before folio_end_writeback() to 401 * avoid racing w/ kill_f2fs_super() 402 */ 403 if (type == F2FS_WB_CP_DATA && !get_pages(sbi, type) && 404 wq_has_sleeper(&sbi->cp_wait)) 405 wake_up(&sbi->cp_wait); 406 407 folio_clear_f2fs_gcing(folio); 408 folio_end_writeback(folio); 409 } 410 411 bio_put(bio); 412 } 413 414 static void f2fs_write_end_io(struct bio *bio) 415 { 416 iostat_update_and_unbind_ctx(bio); 417 418 f2fs_write_end_bio(bio); 419 } 420 421 #ifdef CONFIG_BLK_DEV_ZONED 422 static void f2fs_zone_write_end_io(struct bio *bio) 423 { 424 struct f2fs_bio_info *io = (struct f2fs_bio_info *)bio->bi_private; 425 426 bio->bi_private = io->bi_private; 427 complete(&io->zone_wait); 428 f2fs_write_end_io(bio); 429 } 430 #endif 431 432 struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi, 433 block_t blk_addr, sector_t *sector) 434 { 435 struct block_device *bdev = sbi->sb->s_bdev; 436 int i; 437 438 if (f2fs_is_multi_device(sbi)) { 439 for (i = 0; i < sbi->s_ndevs; i++) { 440 if (FDEV(i).start_blk <= blk_addr && 441 FDEV(i).end_blk >= blk_addr) { 442 blk_addr -= FDEV(i).start_blk; 443 bdev = FDEV(i).bdev; 444 break; 445 } 446 } 447 } 448 449 if (sector) 450 *sector = SECTOR_FROM_BLOCK(blk_addr); 451 return bdev; 452 } 453 454 int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) 455 { 456 int i; 457 458 if (!f2fs_is_multi_device(sbi)) 459 return 0; 460 461 for (i = 0; i < sbi->s_ndevs; i++) 462 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr) 463 return i; 464 return 0; 465 } 466 467 static blk_opf_t f2fs_io_flags(struct f2fs_io_info *fio) 468 { 469 unsigned int temp_mask = GENMASK(NR_TEMP_TYPE - 1, 0); 470 unsigned int fua_flag, meta_flag, io_flag; 471 blk_opf_t op_flags = 0; 472 473 if (fio->op != REQ_OP_WRITE) 474 return 0; 475 if (fio->type == DATA) 476 io_flag = fio->sbi->data_io_flag; 477 else if (fio->type == NODE) 478 io_flag = fio->sbi->node_io_flag; 479 else 480 return 0; 481 482 fua_flag = io_flag & temp_mask; 483 meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask; 484 485 /* 486 * data/node io flag bits per temp: 487 * REQ_META | REQ_FUA | 488 * 5 | 4 | 3 | 2 | 1 | 0 | 489 * Cold | Warm | Hot | Cold | Warm | Hot | 490 */ 491 if (BIT(fio->temp) & meta_flag) 492 op_flags |= REQ_META; 493 if (BIT(fio->temp) & fua_flag) 494 op_flags |= REQ_FUA; 495 496 if (fio->type == DATA && 497 F2FS_I(fio->folio->mapping->host)->ioprio_hint == F2FS_IOPRIO_WRITE) 498 op_flags |= REQ_PRIO; 499 500 return op_flags; 501 } 502 503 static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages) 504 { 505 struct f2fs_sb_info *sbi = fio->sbi; 506 struct block_device *bdev; 507 sector_t sector; 508 struct bio *bio; 509 510 bdev = f2fs_target_device(sbi, fio->new_blkaddr, §or); 511 bio = bio_alloc_bioset(bdev, npages, 512 fio->op | fio->op_flags | f2fs_io_flags(fio), 513 GFP_NOIO, &f2fs_bioset); 514 bio->bi_iter.bi_sector = sector; 515 if (is_read_io(fio->op)) { 516 bio->bi_end_io = f2fs_read_end_io; 517 bio->bi_private = NULL; 518 } else { 519 bio->bi_end_io = f2fs_write_end_io; 520 bio->bi_private = sbi; 521 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, 522 fio->type, fio->temp); 523 bio->bi_write_stream = f2fs_io_type_to_write_stream(bdev, fio->type, 524 fio->temp); 525 } 526 iostat_alloc_and_bind_ctx(sbi, bio, NULL); 527 528 if (fio->io_wbc) 529 wbc_init_bio(fio->io_wbc, bio); 530 531 return bio; 532 } 533 534 static void f2fs_set_bio_crypt_ctx(struct bio *bio, const struct inode *inode, 535 pgoff_t first_idx, 536 const struct f2fs_io_info *fio, 537 gfp_t gfp_mask) 538 { 539 /* 540 * The f2fs garbage collector sets ->encrypted_page when it wants to 541 * read/write raw data without encryption. 542 */ 543 if (!fio || !fio->encrypted_page) 544 fscrypt_set_bio_crypt_ctx(bio, inode, 545 (loff_t)first_idx << inode->i_blkbits, 546 gfp_mask); 547 } 548 549 static bool f2fs_crypt_mergeable_bio(struct bio *bio, const struct inode *inode, 550 pgoff_t next_idx, 551 const struct f2fs_io_info *fio) 552 { 553 /* 554 * The f2fs garbage collector sets ->encrypted_page when it wants to 555 * read/write raw data without encryption. 556 */ 557 if (fio && fio->encrypted_page) 558 return !bio_has_crypt_ctx(bio); 559 560 return fscrypt_mergeable_bio(bio, inode, 561 (loff_t)next_idx << inode->i_blkbits); 562 } 563 564 void f2fs_submit_read_bio(struct f2fs_sb_info *sbi, struct bio *bio, 565 enum page_type type) 566 { 567 if (!bio) 568 return; 569 570 WARN_ON_ONCE(!is_read_io(bio_op(bio))); 571 trace_f2fs_submit_read_bio(sbi->sb, type, bio); 572 573 iostat_update_submit_ctx(bio, type); 574 blk_crypto_submit_bio(bio); 575 } 576 577 static void f2fs_submit_write_bio(struct f2fs_sb_info *sbi, struct bio *bio, 578 enum page_type type) 579 { 580 WARN_ON_ONCE(is_read_io(bio_op(bio))); 581 trace_f2fs_submit_write_bio(sbi->sb, type, bio); 582 iostat_update_submit_ctx(bio, type); 583 blk_crypto_submit_bio(bio); 584 } 585 586 static void __submit_merged_bio(struct f2fs_bio_info *io) 587 { 588 struct f2fs_io_info *fio = &io->fio; 589 590 if (!io->bio) 591 return; 592 593 if (is_read_io(fio->op)) { 594 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio); 595 f2fs_submit_read_bio(io->sbi, io->bio, fio->type); 596 } else { 597 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio); 598 f2fs_submit_write_bio(io->sbi, io->bio, fio->type); 599 } 600 io->bio = NULL; 601 } 602 603 static bool __has_merged_page(struct bio *bio, struct inode *inode, 604 struct folio *folio, nid_t ino) 605 { 606 struct folio_iter fi; 607 608 if (!bio) 609 return false; 610 611 if (!inode && !folio && !ino) 612 return true; 613 614 bio_for_each_folio_all(fi, bio) { 615 struct folio *target = fi.folio; 616 617 if (fscrypt_is_bounce_folio(target)) { 618 target = fscrypt_pagecache_folio(target); 619 if (IS_ERR(target)) 620 continue; 621 } 622 if (f2fs_is_compressed_page(target)) { 623 target = f2fs_compress_control_folio(target); 624 if (IS_ERR(target)) 625 continue; 626 } 627 628 if (inode && inode == target->mapping->host) 629 return true; 630 if (folio && folio == target) 631 return true; 632 if (ino && ino == ino_of_node(target)) 633 return true; 634 } 635 636 return false; 637 } 638 639 int f2fs_init_write_merge_io(struct f2fs_sb_info *sbi) 640 { 641 int i; 642 643 for (i = 0; i < NR_PAGE_TYPE; i++) { 644 int n = (i == META) ? 1 : NR_TEMP_TYPE; 645 int j; 646 647 sbi->write_io[i] = f2fs_kmalloc(sbi, 648 array_size(n, sizeof(struct f2fs_bio_info)), 649 GFP_KERNEL); 650 if (!sbi->write_io[i]) 651 return -ENOMEM; 652 653 for (j = HOT; j < n; j++) { 654 struct f2fs_bio_info *io = &sbi->write_io[i][j]; 655 656 init_f2fs_rwsem_trace(&io->io_rwsem, sbi, 657 LOCK_NAME_IO_RWSEM); 658 io->sbi = sbi; 659 io->bio = NULL; 660 io->last_block_in_bio = 0; 661 spin_lock_init(&io->io_lock); 662 INIT_LIST_HEAD(&io->io_list); 663 INIT_LIST_HEAD(&io->bio_list); 664 init_f2fs_rwsem(&io->bio_list_lock); 665 #ifdef CONFIG_BLK_DEV_ZONED 666 init_completion(&io->zone_wait); 667 io->zone_pending_bio = NULL; 668 io->bi_private = NULL; 669 #endif 670 } 671 } 672 673 return 0; 674 } 675 676 static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi, 677 enum page_type type, enum temp_type temp) 678 { 679 enum page_type btype = PAGE_TYPE_OF_BIO(type); 680 struct f2fs_bio_info *io = sbi->write_io[btype] + temp; 681 struct f2fs_lock_context lc; 682 683 f2fs_down_write_trace(&io->io_rwsem, &lc); 684 685 if (!io->bio) 686 goto unlock_out; 687 688 /* change META to META_FLUSH in the checkpoint procedure */ 689 if (type >= META_FLUSH) { 690 io->fio.type = META_FLUSH; 691 io->bio->bi_opf |= REQ_META | REQ_PRIO | REQ_SYNC; 692 if (!test_opt(sbi, NOBARRIER)) 693 io->bio->bi_opf |= REQ_PREFLUSH | REQ_FUA; 694 } 695 __submit_merged_bio(io); 696 unlock_out: 697 f2fs_up_write_trace(&io->io_rwsem, &lc); 698 } 699 700 static void __submit_merged_write_cond(struct f2fs_sb_info *sbi, 701 struct inode *inode, struct folio *folio, 702 nid_t ino, enum page_type type, bool writeback) 703 { 704 enum temp_type temp; 705 bool ret = true; 706 bool force = !inode && !folio && !ino; 707 708 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { 709 if (!force) { 710 enum page_type btype = PAGE_TYPE_OF_BIO(type); 711 struct f2fs_bio_info *io = sbi->write_io[btype] + temp; 712 struct f2fs_lock_context lc; 713 714 f2fs_down_read_trace(&io->io_rwsem, &lc); 715 ret = __has_merged_page(io->bio, inode, folio, ino); 716 f2fs_up_read_trace(&io->io_rwsem, &lc); 717 } 718 if (ret) { 719 __f2fs_submit_merged_write(sbi, type, temp); 720 /* 721 * For waitting writebck case, if the bio owned by the 722 * folio is already submitted, we do not need to submit 723 * other types of bios. 724 */ 725 if (writeback) 726 break; 727 } 728 729 /* TODO: use HOT temp only for meta pages now. */ 730 if (type >= META) 731 break; 732 } 733 } 734 735 void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type) 736 { 737 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, false); 738 } 739 740 void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi, 741 struct inode *inode, struct folio *folio, 742 nid_t ino, enum page_type type) 743 { 744 __submit_merged_write_cond(sbi, inode, folio, ino, type, false); 745 } 746 747 void f2fs_submit_merged_write_folio(struct f2fs_sb_info *sbi, 748 struct folio *folio, enum page_type type) 749 { 750 __submit_merged_write_cond(sbi, NULL, folio, 0, type, true); 751 } 752 753 void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi) 754 { 755 f2fs_submit_merged_write(sbi, DATA); 756 f2fs_submit_merged_write(sbi, NODE); 757 f2fs_submit_merged_write(sbi, META); 758 } 759 760 /* 761 * Fill the locked page with data located in the block address. 762 * A caller needs to unlock the page on failure. 763 */ 764 int f2fs_submit_page_bio(struct f2fs_io_info *fio) 765 { 766 struct bio *bio; 767 struct folio *fio_folio = fio->folio; 768 struct folio *data_folio = fio->encrypted_page ? 769 page_folio(fio->encrypted_page) : fio_folio; 770 771 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, 772 fio->is_por ? META_POR : (__is_meta_io(fio) ? 773 META_GENERIC : DATA_GENERIC_ENHANCE))) 774 return -EFSCORRUPTED; 775 776 trace_f2fs_submit_folio_bio(data_folio, fio); 777 778 /* Allocate a new bio */ 779 bio = __bio_alloc(fio, 1); 780 781 f2fs_set_bio_crypt_ctx(bio, fio_folio->mapping->host, 782 fio_folio->index, fio, GFP_NOIO); 783 bio_add_folio_nofail(bio, data_folio, folio_size(data_folio), 0); 784 785 if (fio->io_wbc && !is_read_io(fio->op)) 786 wbc_account_cgroup_owner(fio->io_wbc, fio_folio, PAGE_SIZE); 787 788 inc_page_count(fio->sbi, is_read_io(fio->op) ? 789 __read_io_type(data_folio) : WB_DATA_TYPE(fio->folio, false)); 790 791 if (is_read_io(bio_op(bio))) 792 f2fs_submit_read_bio(fio->sbi, bio, fio->type); 793 else 794 f2fs_submit_write_bio(fio->sbi, bio, fio->type); 795 return 0; 796 } 797 798 static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio, 799 block_t last_blkaddr, block_t cur_blkaddr) 800 { 801 if (unlikely(sbi->max_io_bytes && 802 bio->bi_iter.bi_size >= sbi->max_io_bytes)) 803 return false; 804 if (last_blkaddr + 1 != cur_blkaddr) 805 return false; 806 return bio->bi_bdev == f2fs_target_device(sbi, cur_blkaddr, NULL); 807 } 808 809 static bool io_type_is_mergeable(struct f2fs_bio_info *io, 810 struct f2fs_io_info *fio) 811 { 812 blk_opf_t mask = ~(REQ_PREFLUSH | REQ_FUA); 813 814 if (io->fio.op != fio->op) 815 return false; 816 return (io->fio.op_flags & mask) == (fio->op_flags & mask); 817 } 818 819 static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio, 820 struct f2fs_bio_info *io, 821 struct f2fs_io_info *fio, 822 block_t last_blkaddr, 823 block_t cur_blkaddr) 824 { 825 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr)) 826 return false; 827 return io_type_is_mergeable(io, fio); 828 } 829 830 static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio, 831 struct folio *folio, enum temp_type temp) 832 { 833 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp; 834 struct bio_entry *be; 835 836 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS, true, NULL); 837 be->bio = bio; 838 bio_get(bio); 839 840 bio_add_folio_nofail(bio, folio, folio_size(folio), 0); 841 842 f2fs_down_write(&io->bio_list_lock); 843 list_add_tail(&be->list, &io->bio_list); 844 f2fs_up_write(&io->bio_list_lock); 845 } 846 847 static void del_bio_entry(struct bio_entry *be) 848 { 849 list_del(&be->list); 850 kmem_cache_free(bio_entry_slab, be); 851 } 852 853 static int add_ipu_page(struct f2fs_io_info *fio, struct bio **bio, 854 struct folio *folio) 855 { 856 struct folio *fio_folio = fio->folio; 857 struct f2fs_sb_info *sbi = fio->sbi; 858 enum temp_type temp; 859 bool found = false; 860 int ret = -EAGAIN; 861 862 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) { 863 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp; 864 struct list_head *head = &io->bio_list; 865 struct bio_entry *be; 866 867 f2fs_down_write(&io->bio_list_lock); 868 list_for_each_entry(be, head, list) { 869 if (be->bio != *bio) 870 continue; 871 872 found = true; 873 874 f2fs_bug_on(sbi, !page_is_mergeable(sbi, *bio, 875 *fio->last_block, 876 fio->new_blkaddr)); 877 if (f2fs_crypt_mergeable_bio(*bio, 878 fio_folio->mapping->host, 879 fio_folio->index, fio) && 880 bio_add_folio(*bio, folio, folio_size(folio), 0)) { 881 ret = 0; 882 break; 883 } 884 885 /* page can't be merged into bio; submit the bio */ 886 del_bio_entry(be); 887 f2fs_submit_write_bio(sbi, *bio, DATA); 888 break; 889 } 890 f2fs_up_write(&io->bio_list_lock); 891 } 892 893 if (ret) { 894 bio_put(*bio); 895 *bio = NULL; 896 } 897 898 return ret; 899 } 900 901 void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi, 902 struct bio **bio, struct folio *folio) 903 { 904 enum temp_type temp; 905 bool found = false; 906 struct bio *target = bio ? *bio : NULL; 907 908 f2fs_bug_on(sbi, !target && !folio); 909 910 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) { 911 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp; 912 struct list_head *head = &io->bio_list; 913 struct bio_entry *be; 914 915 if (list_empty(head)) 916 continue; 917 918 f2fs_down_read(&io->bio_list_lock); 919 list_for_each_entry(be, head, list) { 920 if (target) 921 found = (target == be->bio); 922 else 923 found = __has_merged_page(be->bio, NULL, 924 folio, 0); 925 if (found) 926 break; 927 } 928 f2fs_up_read(&io->bio_list_lock); 929 930 if (!found) 931 continue; 932 933 found = false; 934 935 f2fs_down_write(&io->bio_list_lock); 936 list_for_each_entry(be, head, list) { 937 if (target) 938 found = (target == be->bio); 939 else 940 found = __has_merged_page(be->bio, NULL, 941 folio, 0); 942 if (found) { 943 target = be->bio; 944 del_bio_entry(be); 945 break; 946 } 947 } 948 f2fs_up_write(&io->bio_list_lock); 949 } 950 951 if (found) 952 f2fs_submit_write_bio(sbi, target, DATA); 953 if (bio && *bio) { 954 bio_put(*bio); 955 *bio = NULL; 956 } 957 } 958 959 void f2fs_submit_all_merged_ipu_writes(struct f2fs_sb_info *sbi) 960 { 961 struct bio_entry *be, *tmp; 962 struct f2fs_bio_info *io; 963 enum temp_type temp; 964 965 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { 966 LIST_HEAD(list); 967 968 io = sbi->write_io[DATA] + temp; 969 970 /* A lockless list_empty() check is safe here: any bios from 971 * other kworkers that we miss will be submitted by those 972 * kworkers accordingly. 973 */ 974 if (list_empty(&io->bio_list)) 975 continue; 976 977 f2fs_down_write(&io->bio_list_lock); 978 list_splice_init(&io->bio_list, &list); 979 f2fs_up_write(&io->bio_list_lock); 980 981 list_for_each_entry_safe(be, tmp, &list, list) { 982 f2fs_submit_write_bio(sbi, be->bio, DATA); 983 del_bio_entry(be); 984 } 985 } 986 } 987 988 int f2fs_merge_page_bio(struct f2fs_io_info *fio) 989 { 990 struct bio *bio = *fio->bio; 991 struct folio *data_folio = fio->encrypted_page ? 992 page_folio(fio->encrypted_page) : fio->folio; 993 struct folio *folio = fio->folio; 994 995 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, 996 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC)) 997 return -EFSCORRUPTED; 998 999 trace_f2fs_submit_folio_bio(data_folio, fio); 1000 1001 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block, 1002 fio->new_blkaddr)) 1003 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL); 1004 alloc_new: 1005 if (!bio) { 1006 bio = __bio_alloc(fio, BIO_MAX_VECS); 1007 f2fs_set_bio_crypt_ctx(bio, folio->mapping->host, 1008 folio->index, fio, GFP_NOIO); 1009 1010 add_bio_entry(fio->sbi, bio, data_folio, fio->temp); 1011 } else { 1012 if (add_ipu_page(fio, &bio, data_folio)) 1013 goto alloc_new; 1014 } 1015 1016 if (fio->io_wbc) 1017 wbc_account_cgroup_owner(fio->io_wbc, folio, folio_size(folio)); 1018 1019 inc_page_count(fio->sbi, WB_DATA_TYPE(folio, false)); 1020 1021 *fio->last_block = fio->new_blkaddr; 1022 *fio->bio = bio; 1023 1024 return 0; 1025 } 1026 1027 #ifdef CONFIG_BLK_DEV_ZONED 1028 static bool is_end_zone_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr) 1029 { 1030 struct block_device *bdev = sbi->sb->s_bdev; 1031 int devi = 0; 1032 1033 if (f2fs_is_multi_device(sbi)) { 1034 devi = f2fs_target_device_index(sbi, blkaddr); 1035 if (blkaddr < FDEV(devi).start_blk || 1036 blkaddr > FDEV(devi).end_blk) { 1037 f2fs_err(sbi, "Invalid block %x", blkaddr); 1038 return false; 1039 } 1040 blkaddr -= FDEV(devi).start_blk; 1041 bdev = FDEV(devi).bdev; 1042 } 1043 return bdev_is_zoned(bdev) && 1044 f2fs_blkz_is_seq(sbi, devi, blkaddr) && 1045 (blkaddr % sbi->blocks_per_blkz == sbi->blocks_per_blkz - 1); 1046 } 1047 #endif 1048 1049 void f2fs_submit_page_write(struct f2fs_io_info *fio) 1050 { 1051 struct f2fs_sb_info *sbi = fio->sbi; 1052 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); 1053 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp; 1054 struct folio *bio_folio; 1055 struct f2fs_lock_context lc; 1056 enum count_type type; 1057 1058 f2fs_bug_on(sbi, is_read_io(fio->op)); 1059 1060 f2fs_down_write_trace(&io->io_rwsem, &lc); 1061 next: 1062 #ifdef CONFIG_BLK_DEV_ZONED 1063 if (f2fs_sb_has_blkzoned(sbi) && btype < META && io->zone_pending_bio) { 1064 wait_for_completion_io(&io->zone_wait); 1065 bio_put(io->zone_pending_bio); 1066 io->zone_pending_bio = NULL; 1067 io->bi_private = NULL; 1068 } 1069 #endif 1070 1071 if (fio->in_list) { 1072 spin_lock(&io->io_lock); 1073 if (list_empty(&io->io_list)) { 1074 spin_unlock(&io->io_lock); 1075 goto out; 1076 } 1077 fio = list_first_entry(&io->io_list, 1078 struct f2fs_io_info, list); 1079 list_del(&fio->list); 1080 spin_unlock(&io->io_lock); 1081 } 1082 1083 verify_fio_blkaddr(fio); 1084 1085 if (fio->encrypted_page) 1086 bio_folio = page_folio(fio->encrypted_page); 1087 else if (fio->compressed_page) 1088 bio_folio = page_folio(fio->compressed_page); 1089 else 1090 bio_folio = fio->folio; 1091 1092 /* set submitted = true as a return value */ 1093 fio->submitted = 1; 1094 1095 type = WB_DATA_TYPE(bio_folio, fio->compressed_page); 1096 inc_page_count(sbi, type); 1097 1098 if (io->bio && 1099 (!io_is_mergeable(sbi, io->bio, io, fio, io->last_block_in_bio, 1100 fio->new_blkaddr) || 1101 !f2fs_crypt_mergeable_bio(io->bio, fio_inode(fio), 1102 bio_folio->index, fio))) 1103 __submit_merged_bio(io); 1104 alloc_new: 1105 if (io->bio == NULL) { 1106 io->bio = __bio_alloc(fio, BIO_MAX_VECS); 1107 f2fs_set_bio_crypt_ctx(io->bio, fio_inode(fio), 1108 bio_folio->index, fio, GFP_NOIO); 1109 io->fio = *fio; 1110 } 1111 1112 if (!bio_add_folio(io->bio, bio_folio, folio_size(bio_folio), 0)) { 1113 __submit_merged_bio(io); 1114 goto alloc_new; 1115 } 1116 1117 if (fio->io_wbc) 1118 wbc_account_cgroup_owner(fio->io_wbc, fio->folio, 1119 folio_size(fio->folio)); 1120 1121 io->last_block_in_bio = fio->new_blkaddr; 1122 1123 trace_f2fs_submit_folio_write(fio->folio, fio); 1124 #ifdef CONFIG_BLK_DEV_ZONED 1125 if (f2fs_sb_has_blkzoned(sbi) && btype < META && 1126 is_end_zone_blkaddr(sbi, fio->new_blkaddr)) { 1127 bio_get(io->bio); 1128 reinit_completion(&io->zone_wait); 1129 io->bi_private = io->bio->bi_private; 1130 io->bio->bi_private = io; 1131 io->bio->bi_end_io = f2fs_zone_write_end_io; 1132 io->zone_pending_bio = io->bio; 1133 __submit_merged_bio(io); 1134 } 1135 #endif 1136 if (fio->in_list) 1137 goto next; 1138 out: 1139 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) || 1140 !f2fs_is_checkpoint_ready(sbi)) 1141 __submit_merged_bio(io); 1142 f2fs_up_write_trace(&io->io_rwsem, &lc); 1143 } 1144 1145 static struct bio *f2fs_grab_read_bio(struct inode *inode, 1146 struct fsverity_info *vi, block_t blkaddr, 1147 unsigned nr_pages, blk_opf_t op_flag, 1148 pgoff_t first_idx, bool for_write) 1149 { 1150 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1151 struct bio *bio; 1152 struct bio_post_read_ctx *ctx = NULL; 1153 unsigned int post_read_steps = 0; 1154 sector_t sector; 1155 struct block_device *bdev = f2fs_target_device(sbi, blkaddr, §or); 1156 1157 bio = bio_alloc_bioset(bdev, bio_max_segs(nr_pages), 1158 REQ_OP_READ | op_flag, 1159 for_write ? GFP_NOIO : GFP_KERNEL, &f2fs_bioset); 1160 bio->bi_iter.bi_sector = sector; 1161 f2fs_set_bio_crypt_ctx(bio, inode, first_idx, NULL, GFP_NOFS); 1162 bio->bi_end_io = f2fs_read_end_io; 1163 1164 if (fscrypt_inode_uses_fs_layer_crypto(inode)) 1165 post_read_steps |= STEP_DECRYPT; 1166 1167 if (vi) 1168 post_read_steps |= STEP_VERITY; 1169 1170 /* 1171 * STEP_DECOMPRESS is handled specially, since a compressed file might 1172 * contain both compressed and uncompressed clusters. We'll allocate a 1173 * bio_post_read_ctx if the file is compressed, but the caller is 1174 * responsible for enabling STEP_DECOMPRESS if it's actually needed. 1175 */ 1176 1177 if (post_read_steps || f2fs_compressed_file(inode)) { 1178 /* Due to the mempool, this never fails. */ 1179 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS); 1180 ctx->bio = bio; 1181 ctx->sbi = sbi; 1182 ctx->vi = vi; 1183 ctx->enabled_steps = post_read_steps; 1184 ctx->fs_blkaddr = blkaddr; 1185 ctx->decompression_attempted = false; 1186 bio->bi_private = ctx; 1187 } 1188 iostat_alloc_and_bind_ctx(sbi, bio, ctx); 1189 1190 return bio; 1191 } 1192 1193 /* This can handle encryption stuffs */ 1194 static void f2fs_submit_page_read(struct inode *inode, struct fsverity_info *vi, 1195 struct folio *folio, block_t blkaddr, 1196 blk_opf_t op_flags, bool for_write) 1197 { 1198 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1199 struct bio *bio; 1200 1201 bio = f2fs_grab_read_bio(inode, vi, blkaddr, 1, op_flags, folio->index, 1202 for_write); 1203 1204 /* wait for GCed page writeback via META_MAPPING */ 1205 f2fs_wait_on_block_writeback(inode, blkaddr); 1206 1207 if (!bio_add_folio(bio, folio, PAGE_SIZE, 0)) 1208 f2fs_bug_on(sbi, 1); 1209 1210 inc_page_count(sbi, F2FS_RD_DATA); 1211 f2fs_update_iostat(sbi, NULL, FS_DATA_READ_IO, F2FS_BLKSIZE); 1212 f2fs_submit_read_bio(sbi, bio, DATA); 1213 } 1214 1215 static void __set_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) 1216 { 1217 __le32 *addr = get_dnode_addr(dn->inode, dn->node_folio); 1218 1219 dn->data_blkaddr = blkaddr; 1220 addr[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); 1221 } 1222 1223 /* 1224 * Lock ordering for the change of data block address: 1225 * ->data_page 1226 * ->node_folio 1227 * update block addresses in the node page 1228 */ 1229 void f2fs_set_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) 1230 { 1231 f2fs_folio_wait_writeback(dn->node_folio, NODE, true, true); 1232 __set_data_blkaddr(dn, blkaddr); 1233 if (folio_mark_dirty(dn->node_folio)) 1234 dn->node_changed = true; 1235 } 1236 1237 void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) 1238 { 1239 f2fs_set_data_blkaddr(dn, blkaddr); 1240 f2fs_update_read_extent_cache(dn); 1241 } 1242 1243 /* dn->ofs_in_node will be returned with up-to-date last block pointer */ 1244 int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) 1245 { 1246 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 1247 int err; 1248 1249 if (!count) 1250 return 0; 1251 1252 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) 1253 return -EPERM; 1254 err = inc_valid_block_count(sbi, dn->inode, &count, true); 1255 if (unlikely(err)) 1256 return err; 1257 1258 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, 1259 dn->ofs_in_node, count); 1260 1261 f2fs_folio_wait_writeback(dn->node_folio, NODE, true, true); 1262 1263 for (; count > 0; dn->ofs_in_node++) { 1264 block_t blkaddr = f2fs_data_blkaddr(dn); 1265 1266 if (blkaddr == NULL_ADDR) { 1267 __set_data_blkaddr(dn, NEW_ADDR); 1268 count--; 1269 } 1270 } 1271 1272 if (folio_mark_dirty(dn->node_folio)) 1273 dn->node_changed = true; 1274 return 0; 1275 } 1276 1277 /* Should keep dn->ofs_in_node unchanged */ 1278 int f2fs_reserve_new_block(struct dnode_of_data *dn) 1279 { 1280 unsigned int ofs_in_node = dn->ofs_in_node; 1281 int ret; 1282 1283 ret = f2fs_reserve_new_blocks(dn, 1); 1284 dn->ofs_in_node = ofs_in_node; 1285 return ret; 1286 } 1287 1288 int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) 1289 { 1290 bool need_put = dn->inode_folio ? false : true; 1291 int err; 1292 1293 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE); 1294 if (err) 1295 return err; 1296 1297 if (dn->data_blkaddr == NULL_ADDR) 1298 err = f2fs_reserve_new_block(dn); 1299 if (err || need_put) 1300 f2fs_put_dnode(dn); 1301 return err; 1302 } 1303 1304 static inline struct fsverity_info *f2fs_need_verity(const struct inode *inode, 1305 pgoff_t idx) 1306 { 1307 if (idx < DIV_ROUND_UP(inode->i_size, PAGE_SIZE)) 1308 return fsverity_get_info(inode); 1309 return NULL; 1310 } 1311 1312 struct folio *f2fs_get_read_data_folio(struct inode *inode, pgoff_t index, 1313 blk_opf_t op_flags, bool for_write, pgoff_t *next_pgofs) 1314 { 1315 struct address_space *mapping = inode->i_mapping; 1316 struct dnode_of_data dn; 1317 struct folio *folio; 1318 int err; 1319 retry: 1320 folio = f2fs_grab_cache_folio(mapping, index, for_write); 1321 if (IS_ERR(folio)) 1322 return folio; 1323 1324 if (folio_test_large(folio)) { 1325 pgoff_t folio_index = mapping_align_index(mapping, index); 1326 1327 f2fs_folio_put(folio, true); 1328 invalidate_inode_pages2_range(mapping, folio_index, 1329 folio_index + folio_nr_pages(folio) - 1); 1330 f2fs_schedule_timeout(DEFAULT_SCHEDULE_TIMEOUT); 1331 goto retry; 1332 } 1333 1334 if (f2fs_lookup_read_extent_cache_block(inode, index, 1335 &dn.data_blkaddr)) { 1336 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr, 1337 DATA_GENERIC_ENHANCE_READ)) { 1338 err = -EFSCORRUPTED; 1339 goto put_err; 1340 } 1341 goto got_it; 1342 } 1343 1344 set_new_dnode(&dn, inode, NULL, NULL, 0); 1345 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); 1346 if (err) { 1347 if (err == -ENOENT && next_pgofs) 1348 *next_pgofs = f2fs_get_next_page_offset(&dn, index); 1349 goto put_err; 1350 } 1351 f2fs_put_dnode(&dn); 1352 1353 if (unlikely(dn.data_blkaddr == NULL_ADDR)) { 1354 err = -ENOENT; 1355 if (next_pgofs) 1356 *next_pgofs = index + 1; 1357 goto put_err; 1358 } 1359 if (dn.data_blkaddr != NEW_ADDR && 1360 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode), 1361 dn.data_blkaddr, 1362 DATA_GENERIC_ENHANCE)) { 1363 err = -EFSCORRUPTED; 1364 goto put_err; 1365 } 1366 got_it: 1367 if (folio_test_uptodate(folio)) { 1368 folio_unlock(folio); 1369 return folio; 1370 } 1371 1372 /* 1373 * A new dentry page is allocated but not able to be written, since its 1374 * new inode page couldn't be allocated due to -ENOSPC. 1375 * In such the case, its blkaddr can be remained as NEW_ADDR. 1376 * see, f2fs_add_link -> f2fs_get_new_data_folio -> 1377 * f2fs_init_inode_metadata. 1378 */ 1379 if (dn.data_blkaddr == NEW_ADDR) { 1380 folio_zero_segment(folio, 0, folio_size(folio)); 1381 if (!folio_test_uptodate(folio)) 1382 folio_mark_uptodate(folio); 1383 folio_unlock(folio); 1384 return folio; 1385 } 1386 1387 f2fs_submit_page_read(inode, f2fs_need_verity(inode, folio->index), 1388 folio, dn.data_blkaddr, op_flags, for_write); 1389 return folio; 1390 1391 put_err: 1392 f2fs_folio_put(folio, true); 1393 return ERR_PTR(err); 1394 } 1395 1396 struct folio *f2fs_find_data_folio(struct inode *inode, pgoff_t index, 1397 pgoff_t *next_pgofs) 1398 { 1399 struct address_space *mapping = inode->i_mapping; 1400 struct folio *folio; 1401 1402 folio = f2fs_filemap_get_folio(mapping, index, FGP_ACCESSED, 0); 1403 if (IS_ERR(folio)) 1404 goto read; 1405 if (folio_test_uptodate(folio)) 1406 return folio; 1407 f2fs_folio_put(folio, false); 1408 1409 read: 1410 folio = f2fs_get_read_data_folio(inode, index, 0, false, next_pgofs); 1411 if (IS_ERR(folio)) 1412 return folio; 1413 1414 if (folio_test_uptodate(folio)) 1415 return folio; 1416 1417 folio_wait_locked(folio); 1418 if (unlikely(!folio_test_uptodate(folio))) { 1419 f2fs_folio_put(folio, false); 1420 return ERR_PTR(-EIO); 1421 } 1422 return folio; 1423 } 1424 1425 /* 1426 * If it tries to access a hole, return an error. 1427 * Because, the callers, functions in dir.c and GC, should be able to know 1428 * whether this page exists or not. 1429 */ 1430 struct folio *f2fs_get_lock_data_folio(struct inode *inode, pgoff_t index, 1431 bool for_write) 1432 { 1433 struct address_space *mapping = inode->i_mapping; 1434 struct folio *folio; 1435 1436 folio = f2fs_get_read_data_folio(inode, index, 0, for_write, NULL); 1437 if (IS_ERR(folio)) 1438 return folio; 1439 1440 /* wait for read completion */ 1441 folio_lock(folio); 1442 if (unlikely(folio->mapping != mapping || !folio_test_uptodate(folio))) { 1443 f2fs_folio_put(folio, true); 1444 return ERR_PTR(-EIO); 1445 } 1446 return folio; 1447 } 1448 1449 /* 1450 * Caller ensures that this data page is never allocated. 1451 * A new zero-filled data page is allocated in the page cache. 1452 * 1453 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and 1454 * f2fs_unlock_op(). 1455 * Note that, ifolio is set only by make_empty_dir, and if any error occur, 1456 * ifolio should be released by this function. 1457 */ 1458 struct folio *f2fs_get_new_data_folio(struct inode *inode, 1459 struct folio *ifolio, pgoff_t index, bool new_i_size) 1460 { 1461 struct address_space *mapping = inode->i_mapping; 1462 struct folio *folio; 1463 struct dnode_of_data dn; 1464 int err; 1465 1466 folio = f2fs_grab_cache_folio(mapping, index, true); 1467 if (IS_ERR(folio)) { 1468 /* 1469 * before exiting, we should make sure ifolio will be released 1470 * if any error occur. 1471 */ 1472 f2fs_folio_put(ifolio, true); 1473 return ERR_PTR(-ENOMEM); 1474 } 1475 1476 set_new_dnode(&dn, inode, ifolio, NULL, 0); 1477 err = f2fs_reserve_block(&dn, index); 1478 if (err) { 1479 f2fs_folio_put(folio, true); 1480 return ERR_PTR(err); 1481 } 1482 if (!ifolio) 1483 f2fs_put_dnode(&dn); 1484 1485 if (folio_test_uptodate(folio)) 1486 goto got_it; 1487 1488 if (dn.data_blkaddr == NEW_ADDR) { 1489 folio_zero_segment(folio, 0, folio_size(folio)); 1490 if (!folio_test_uptodate(folio)) 1491 folio_mark_uptodate(folio); 1492 } else { 1493 f2fs_folio_put(folio, true); 1494 1495 /* if ifolio exists, blkaddr should be NEW_ADDR */ 1496 f2fs_bug_on(F2FS_I_SB(inode), ifolio); 1497 folio = f2fs_get_lock_data_folio(inode, index, true); 1498 if (IS_ERR(folio)) 1499 return folio; 1500 } 1501 got_it: 1502 if (new_i_size && i_size_read(inode) < 1503 ((loff_t)(index + 1) << PAGE_SHIFT)) 1504 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); 1505 return folio; 1506 } 1507 1508 static int __allocate_data_block(struct dnode_of_data *dn, int seg_type) 1509 { 1510 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 1511 struct f2fs_summary sum; 1512 struct node_info ni; 1513 block_t old_blkaddr; 1514 blkcnt_t count = 1; 1515 int err; 1516 1517 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) 1518 return -EPERM; 1519 1520 err = f2fs_get_node_info(sbi, dn->nid, &ni, false); 1521 if (err) 1522 return err; 1523 1524 dn->data_blkaddr = f2fs_data_blkaddr(dn); 1525 if (dn->data_blkaddr == NULL_ADDR) { 1526 err = inc_valid_block_count(sbi, dn->inode, &count, true); 1527 if (unlikely(err)) 1528 return err; 1529 } 1530 1531 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); 1532 old_blkaddr = dn->data_blkaddr; 1533 err = f2fs_allocate_data_block(sbi, NULL, old_blkaddr, 1534 &dn->data_blkaddr, &sum, seg_type, NULL); 1535 if (err) 1536 return err; 1537 1538 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) 1539 f2fs_invalidate_internal_cache(sbi, old_blkaddr, 1); 1540 1541 f2fs_update_data_blkaddr(dn, dn->data_blkaddr); 1542 return 0; 1543 } 1544 1545 static void f2fs_map_lock(struct f2fs_sb_info *sbi, 1546 struct f2fs_lock_context *lc, 1547 int flag) 1548 { 1549 if (flag == F2FS_GET_BLOCK_PRE_AIO) 1550 f2fs_down_read_trace(&sbi->node_change, lc); 1551 else 1552 f2fs_lock_op(sbi, lc); 1553 } 1554 1555 static void f2fs_map_unlock(struct f2fs_sb_info *sbi, 1556 struct f2fs_lock_context *lc, 1557 int flag) 1558 { 1559 if (flag == F2FS_GET_BLOCK_PRE_AIO) 1560 f2fs_up_read_trace(&sbi->node_change, lc); 1561 else 1562 f2fs_unlock_op(sbi, lc); 1563 } 1564 1565 int f2fs_get_block_locked(struct dnode_of_data *dn, pgoff_t index) 1566 { 1567 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 1568 struct f2fs_lock_context lc; 1569 int err = 0; 1570 1571 f2fs_map_lock(sbi, &lc, F2FS_GET_BLOCK_PRE_AIO); 1572 if (!f2fs_lookup_read_extent_cache_block(dn->inode, index, 1573 &dn->data_blkaddr)) 1574 err = f2fs_reserve_block(dn, index); 1575 f2fs_map_unlock(sbi, &lc, F2FS_GET_BLOCK_PRE_AIO); 1576 1577 return err; 1578 } 1579 1580 static int f2fs_map_no_dnode(struct inode *inode, 1581 struct f2fs_map_blocks *map, struct dnode_of_data *dn, 1582 pgoff_t pgoff) 1583 { 1584 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1585 1586 /* 1587 * There is one exceptional case that read_node_page() may return 1588 * -ENOENT due to filesystem has been shutdown or cp_error, return 1589 * -EIO in that case. 1590 */ 1591 if (map->m_may_create && 1592 (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) || f2fs_cp_error(sbi))) 1593 return -EIO; 1594 1595 if (map->m_next_pgofs) 1596 *map->m_next_pgofs = f2fs_get_next_page_offset(dn, pgoff); 1597 if (map->m_next_extent) 1598 *map->m_next_extent = f2fs_get_next_page_offset(dn, pgoff); 1599 return 0; 1600 } 1601 1602 static bool f2fs_map_blocks_cached(struct inode *inode, 1603 struct f2fs_map_blocks *map, int flag) 1604 { 1605 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1606 unsigned int maxblocks = map->m_len; 1607 pgoff_t pgoff = (pgoff_t)map->m_lblk; 1608 struct extent_info ei = {}; 1609 1610 if (!f2fs_lookup_read_extent_cache(inode, pgoff, &ei)) 1611 return false; 1612 1613 map->m_pblk = ei.blk + pgoff - ei.fofs; 1614 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgoff); 1615 map->m_flags = F2FS_MAP_MAPPED; 1616 if (map->m_next_extent) 1617 *map->m_next_extent = pgoff + map->m_len; 1618 1619 /* for hardware encryption, but to avoid potential issue in future */ 1620 if (flag == F2FS_GET_BLOCK_DIO) 1621 f2fs_wait_on_block_writeback_range(inode, 1622 map->m_pblk, map->m_len); 1623 1624 map->m_multidev_dio = f2fs_allow_multi_device_dio(sbi, flag); 1625 if (map->m_multidev_dio) { 1626 int bidx = f2fs_target_device_index(sbi, map->m_pblk); 1627 struct f2fs_dev_info *dev = &sbi->devs[bidx]; 1628 1629 map->m_bdev = dev->bdev; 1630 map->m_len = min(map->m_len, dev->end_blk + 1 - map->m_pblk); 1631 map->m_pblk -= dev->start_blk; 1632 } else { 1633 map->m_bdev = inode->i_sb->s_bdev; 1634 } 1635 return true; 1636 } 1637 1638 static bool map_is_mergeable(struct f2fs_sb_info *sbi, 1639 struct f2fs_map_blocks *map, 1640 block_t blkaddr, int flag, int bidx, 1641 int ofs) 1642 { 1643 if (map->m_multidev_dio && map->m_bdev != FDEV(bidx).bdev) 1644 return false; 1645 if (map->m_pblk != NEW_ADDR && blkaddr == (map->m_pblk + ofs)) 1646 return true; 1647 if (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) 1648 return true; 1649 if (flag == F2FS_GET_BLOCK_PRE_DIO) 1650 return true; 1651 if (flag == F2FS_GET_BLOCK_DIO && 1652 map->m_pblk == NULL_ADDR && blkaddr == NULL_ADDR) 1653 return true; 1654 return false; 1655 } 1656 1657 /* 1658 * f2fs_map_blocks() tries to find or build mapping relationship which 1659 * maps continuous logical blocks to physical blocks, and return such 1660 * info via f2fs_map_blocks structure. 1661 */ 1662 int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, int flag) 1663 { 1664 unsigned int maxblocks = map->m_len; 1665 struct dnode_of_data dn; 1666 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1667 struct f2fs_lock_context lc; 1668 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE; 1669 pgoff_t pgofs, end_offset, end; 1670 int err = 0, ofs = 1; 1671 unsigned int ofs_in_node, last_ofs_in_node; 1672 blkcnt_t prealloc; 1673 block_t blkaddr; 1674 unsigned int start_pgofs; 1675 int bidx = 0; 1676 bool is_hole; 1677 bool lfs_dio_write; 1678 1679 if (!maxblocks) 1680 return 0; 1681 1682 lfs_dio_write = (flag == F2FS_GET_BLOCK_DIO && f2fs_lfs_mode(sbi) && 1683 map->m_may_create); 1684 1685 if (!map->m_may_create && f2fs_map_blocks_cached(inode, map, flag)) { 1686 struct extent_info ei; 1687 1688 /* 1689 * 1. If map->m_multidev_dio is true, map->m_pblk cannot be 1690 * waitted by f2fs_wait_on_block_writeback_range() and are not 1691 * mergeable. 1692 * 2. If pgofs hits the read extent cache, it means the mapping 1693 * is already cached in the extent cache, but it is not 1694 * mergeable, and there is no need to query the mapping again 1695 * via f2fs_get_dnode_of_data(). 1696 */ 1697 pgofs = (pgoff_t)map->m_lblk + map->m_len; 1698 if (map->m_len == maxblocks || 1699 map->m_multidev_dio || 1700 f2fs_lookup_read_extent_cache(inode, pgofs, &ei)) 1701 goto out; 1702 ofs = map->m_len; 1703 goto map_more; 1704 } 1705 1706 map->m_bdev = inode->i_sb->s_bdev; 1707 map->m_multidev_dio = 1708 f2fs_allow_multi_device_dio(F2FS_I_SB(inode), flag); 1709 1710 map->m_len = 0; 1711 map->m_flags = 0; 1712 1713 /* it only supports block size == page size */ 1714 pgofs = (pgoff_t)map->m_lblk; 1715 map_more: 1716 end = (pgoff_t)map->m_lblk + maxblocks; 1717 1718 if (flag == F2FS_GET_BLOCK_PRECACHE) 1719 mode = LOOKUP_NODE_RA; 1720 1721 next_dnode: 1722 if (map->m_may_create) { 1723 if (f2fs_lfs_mode(sbi)) 1724 f2fs_balance_fs(sbi, true); 1725 f2fs_map_lock(sbi, &lc, flag); 1726 } 1727 1728 /* When reading holes, we need its node page */ 1729 set_new_dnode(&dn, inode, NULL, NULL, 0); 1730 err = f2fs_get_dnode_of_data(&dn, pgofs, mode); 1731 if (err) { 1732 if (flag == F2FS_GET_BLOCK_BMAP) 1733 map->m_pblk = 0; 1734 if (err == -ENOENT) 1735 err = f2fs_map_no_dnode(inode, map, &dn, pgofs); 1736 goto unlock_out; 1737 } 1738 1739 start_pgofs = pgofs; 1740 prealloc = 0; 1741 last_ofs_in_node = ofs_in_node = dn.ofs_in_node; 1742 end_offset = ADDRS_PER_PAGE(dn.node_folio, inode); 1743 1744 next_block: 1745 blkaddr = f2fs_data_blkaddr(&dn); 1746 is_hole = !__is_valid_data_blkaddr(blkaddr); 1747 if (!is_hole && 1748 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) { 1749 err = -EFSCORRUPTED; 1750 goto sync_out; 1751 } 1752 1753 /* use out-place-update for direct IO under LFS mode */ 1754 if (map->m_may_create && (is_hole || 1755 (flag == F2FS_GET_BLOCK_DIO && f2fs_lfs_mode(sbi) && 1756 !f2fs_is_pinned_file(inode) && map->m_last_pblk != blkaddr))) { 1757 if (unlikely(f2fs_cp_error(sbi))) { 1758 err = -EIO; 1759 goto sync_out; 1760 } 1761 1762 switch (flag) { 1763 case F2FS_GET_BLOCK_PRE_AIO: 1764 if (blkaddr == NULL_ADDR) { 1765 prealloc++; 1766 last_ofs_in_node = dn.ofs_in_node; 1767 } 1768 break; 1769 case F2FS_GET_BLOCK_PRE_DIO: 1770 case F2FS_GET_BLOCK_DIO: 1771 err = __allocate_data_block(&dn, map->m_seg_type); 1772 if (err) 1773 goto sync_out; 1774 if (flag == F2FS_GET_BLOCK_PRE_DIO) 1775 file_need_truncate(inode); 1776 set_inode_flag(inode, FI_APPEND_WRITE); 1777 break; 1778 default: 1779 WARN_ON_ONCE(1); 1780 err = -EIO; 1781 goto sync_out; 1782 } 1783 1784 blkaddr = dn.data_blkaddr; 1785 if (is_hole) 1786 map->m_flags |= F2FS_MAP_NEW; 1787 } else if (is_hole) { 1788 if (f2fs_compressed_file(inode) && 1789 f2fs_sanity_check_cluster(&dn)) { 1790 err = -EFSCORRUPTED; 1791 f2fs_handle_error(sbi, 1792 ERROR_CORRUPTED_CLUSTER); 1793 fserror_report_file_metadata(inode, err, GFP_NOFS); 1794 goto sync_out; 1795 } 1796 1797 switch (flag) { 1798 case F2FS_GET_BLOCK_PRECACHE: 1799 goto sync_out; 1800 case F2FS_GET_BLOCK_BMAP: 1801 map->m_pblk = 0; 1802 goto sync_out; 1803 case F2FS_GET_BLOCK_FIEMAP: 1804 if (blkaddr == NULL_ADDR) { 1805 if (map->m_next_pgofs) 1806 *map->m_next_pgofs = pgofs + 1; 1807 goto sync_out; 1808 } 1809 break; 1810 case F2FS_GET_BLOCK_DIO: 1811 if (map->m_next_pgofs) 1812 *map->m_next_pgofs = pgofs + 1; 1813 break; 1814 default: 1815 /* for defragment case */ 1816 if (map->m_next_pgofs) 1817 *map->m_next_pgofs = pgofs + 1; 1818 goto sync_out; 1819 } 1820 } 1821 1822 if (flag == F2FS_GET_BLOCK_PRE_AIO) 1823 goto skip; 1824 1825 if (map->m_multidev_dio) 1826 bidx = f2fs_target_device_index(sbi, blkaddr); 1827 1828 if (map->m_len == 0) { 1829 /* reserved delalloc block should be mapped for fiemap. */ 1830 if (blkaddr == NEW_ADDR) 1831 map->m_flags |= F2FS_MAP_DELALLOC; 1832 /* DIO READ and hole case, should not map the blocks. */ 1833 if (!(flag == F2FS_GET_BLOCK_DIO && is_hole && !map->m_may_create)) 1834 map->m_flags |= F2FS_MAP_MAPPED; 1835 1836 map->m_pblk = blkaddr; 1837 map->m_len = 1; 1838 1839 if (map->m_multidev_dio) 1840 map->m_bdev = FDEV(bidx).bdev; 1841 1842 if (lfs_dio_write) 1843 map->m_last_pblk = NULL_ADDR; 1844 } else if (map_is_mergeable(sbi, map, blkaddr, flag, bidx, ofs)) { 1845 ofs++; 1846 map->m_len++; 1847 } else { 1848 if (lfs_dio_write && !f2fs_is_pinned_file(inode)) 1849 map->m_last_pblk = blkaddr; 1850 goto sync_out; 1851 } 1852 1853 skip: 1854 dn.ofs_in_node++; 1855 pgofs++; 1856 1857 /* preallocate blocks in batch for one dnode page */ 1858 if (flag == F2FS_GET_BLOCK_PRE_AIO && 1859 (pgofs == end || dn.ofs_in_node == end_offset)) { 1860 1861 dn.ofs_in_node = ofs_in_node; 1862 err = f2fs_reserve_new_blocks(&dn, prealloc); 1863 if (err) 1864 goto sync_out; 1865 1866 map->m_len += dn.ofs_in_node - ofs_in_node; 1867 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { 1868 err = -ENOSPC; 1869 goto sync_out; 1870 } 1871 dn.ofs_in_node = end_offset; 1872 } 1873 1874 if (pgofs >= end) 1875 goto sync_out; 1876 else if (dn.ofs_in_node < end_offset) 1877 goto next_block; 1878 1879 if (flag == F2FS_GET_BLOCK_PRECACHE) { 1880 if (map->m_flags & F2FS_MAP_MAPPED) { 1881 unsigned int ofs = start_pgofs - map->m_lblk; 1882 1883 f2fs_update_read_extent_cache_range(&dn, 1884 start_pgofs, map->m_pblk + ofs, 1885 map->m_len - ofs); 1886 } 1887 } 1888 1889 f2fs_put_dnode(&dn); 1890 1891 if (map->m_may_create) { 1892 f2fs_map_unlock(sbi, &lc, flag); 1893 f2fs_balance_fs(sbi, dn.node_changed); 1894 } 1895 goto next_dnode; 1896 1897 sync_out: 1898 1899 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED) { 1900 /* 1901 * for hardware encryption, but to avoid potential issue 1902 * in future 1903 */ 1904 f2fs_wait_on_block_writeback_range(inode, 1905 map->m_pblk, map->m_len); 1906 1907 if (map->m_multidev_dio) { 1908 block_t blk_addr = map->m_pblk; 1909 1910 bidx = f2fs_target_device_index(sbi, map->m_pblk); 1911 1912 map->m_bdev = FDEV(bidx).bdev; 1913 map->m_pblk -= FDEV(bidx).start_blk; 1914 1915 if (map->m_may_create) 1916 f2fs_update_device_state(sbi, inode->i_ino, 1917 blk_addr, map->m_len); 1918 1919 f2fs_bug_on(sbi, blk_addr + map->m_len > 1920 FDEV(bidx).end_blk + 1); 1921 } 1922 } 1923 1924 if (flag == F2FS_GET_BLOCK_PRECACHE) { 1925 if (map->m_flags & F2FS_MAP_MAPPED) { 1926 unsigned int ofs = start_pgofs - map->m_lblk; 1927 1928 if (map->m_len > ofs) 1929 f2fs_update_read_extent_cache_range(&dn, 1930 start_pgofs, map->m_pblk + ofs, 1931 map->m_len - ofs); 1932 } 1933 if (map->m_next_extent) 1934 *map->m_next_extent = is_hole ? pgofs + 1 : pgofs; 1935 } 1936 f2fs_put_dnode(&dn); 1937 unlock_out: 1938 if (map->m_may_create) { 1939 f2fs_map_unlock(sbi, &lc, flag); 1940 f2fs_balance_fs(sbi, dn.node_changed); 1941 } 1942 out: 1943 trace_f2fs_map_blocks(inode, map, flag, err); 1944 return err; 1945 } 1946 1947 static bool __f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len, 1948 bool check_first) 1949 { 1950 struct f2fs_map_blocks map; 1951 block_t last_lblk; 1952 int err; 1953 1954 if (pos + len > i_size_read(inode)) 1955 return false; 1956 1957 map.m_lblk = F2FS_BYTES_TO_BLK(pos); 1958 map.m_next_pgofs = NULL; 1959 map.m_next_extent = NULL; 1960 map.m_seg_type = NO_CHECK_TYPE; 1961 map.m_may_create = false; 1962 last_lblk = F2FS_BLK_ALIGN(pos + len); 1963 1964 while (map.m_lblk < last_lblk) { 1965 map.m_len = last_lblk - map.m_lblk; 1966 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT); 1967 if (err || map.m_len == 0) 1968 return false; 1969 map.m_lblk += map.m_len; 1970 if (check_first) 1971 break; 1972 } 1973 return true; 1974 } 1975 1976 bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len) 1977 { 1978 return __f2fs_overwrite_io(inode, pos, len, false); 1979 } 1980 1981 static int f2fs_xattr_fiemap(struct inode *inode, 1982 struct fiemap_extent_info *fieinfo) 1983 { 1984 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1985 struct node_info ni; 1986 __u64 phys = 0, len; 1987 __u32 flags; 1988 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 1989 int err = 0; 1990 1991 if (f2fs_has_inline_xattr(inode)) { 1992 int offset; 1993 struct folio *folio = f2fs_grab_cache_folio(NODE_MAPPING(sbi), 1994 inode->i_ino, false); 1995 1996 if (IS_ERR(folio)) 1997 return PTR_ERR(folio); 1998 1999 err = f2fs_get_node_info(sbi, inode->i_ino, &ni, false); 2000 if (err) { 2001 f2fs_folio_put(folio, true); 2002 return err; 2003 } 2004 2005 phys = F2FS_BLK_TO_BYTES(ni.blk_addr); 2006 offset = offsetof(struct f2fs_inode, i_addr) + 2007 sizeof(__le32) * (DEF_ADDRS_PER_INODE - 2008 get_inline_xattr_addrs(inode)); 2009 2010 phys += offset; 2011 len = inline_xattr_size(inode); 2012 2013 f2fs_folio_put(folio, true); 2014 2015 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED; 2016 2017 if (!xnid) 2018 flags |= FIEMAP_EXTENT_LAST; 2019 2020 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags); 2021 trace_f2fs_fiemap(inode, 0, phys, len, flags, err); 2022 if (err) 2023 return err; 2024 } 2025 2026 if (xnid) { 2027 struct folio *folio = f2fs_grab_cache_folio(NODE_MAPPING(sbi), 2028 xnid, false); 2029 2030 if (IS_ERR(folio)) 2031 return PTR_ERR(folio); 2032 2033 err = f2fs_get_node_info(sbi, xnid, &ni, false); 2034 if (err) { 2035 f2fs_folio_put(folio, true); 2036 return err; 2037 } 2038 2039 phys = F2FS_BLK_TO_BYTES(ni.blk_addr); 2040 len = inode->i_sb->s_blocksize; 2041 2042 f2fs_folio_put(folio, true); 2043 2044 flags = FIEMAP_EXTENT_LAST; 2045 } 2046 2047 if (phys) { 2048 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags); 2049 trace_f2fs_fiemap(inode, 0, phys, len, flags, err); 2050 } 2051 2052 return (err < 0 ? err : 0); 2053 } 2054 2055 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 2056 u64 start, u64 len) 2057 { 2058 struct f2fs_map_blocks map; 2059 sector_t start_blk, last_blk, blk_len, max_len; 2060 pgoff_t next_pgofs; 2061 u64 logical = 0, phys = 0, size = 0; 2062 u32 flags = 0; 2063 int ret = 0; 2064 bool compr_cluster = false, compr_appended; 2065 unsigned int cluster_size = F2FS_I(inode)->i_cluster_size; 2066 unsigned int count_in_cluster = 0; 2067 loff_t maxbytes; 2068 2069 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) { 2070 ret = f2fs_precache_extents(inode); 2071 if (ret) 2072 return ret; 2073 } 2074 2075 ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_XATTR); 2076 if (ret) 2077 return ret; 2078 2079 inode_lock_shared(inode); 2080 2081 maxbytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode)); 2082 if (start > maxbytes) { 2083 ret = -EFBIG; 2084 goto out; 2085 } 2086 2087 if (len > maxbytes || (maxbytes - len) < start) 2088 len = maxbytes - start; 2089 2090 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { 2091 ret = f2fs_xattr_fiemap(inode, fieinfo); 2092 goto out; 2093 } 2094 2095 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { 2096 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); 2097 if (ret != -EAGAIN) 2098 goto out; 2099 } 2100 2101 start_blk = F2FS_BYTES_TO_BLK(start); 2102 last_blk = F2FS_BYTES_TO_BLK(start + len - 1); 2103 blk_len = last_blk - start_blk + 1; 2104 max_len = F2FS_BYTES_TO_BLK(maxbytes) - start_blk; 2105 2106 next: 2107 memset(&map, 0, sizeof(map)); 2108 map.m_lblk = start_blk; 2109 map.m_len = blk_len; 2110 map.m_next_pgofs = &next_pgofs; 2111 map.m_seg_type = NO_CHECK_TYPE; 2112 2113 if (compr_cluster) { 2114 map.m_lblk += 1; 2115 map.m_len = cluster_size - count_in_cluster; 2116 } 2117 2118 ret = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_FIEMAP); 2119 if (ret) 2120 goto out; 2121 2122 /* HOLE */ 2123 if (!compr_cluster && !(map.m_flags & F2FS_MAP_FLAGS)) { 2124 start_blk = next_pgofs; 2125 2126 if (F2FS_BLK_TO_BYTES(start_blk) < maxbytes) 2127 goto prep_next; 2128 2129 flags |= FIEMAP_EXTENT_LAST; 2130 } 2131 2132 /* 2133 * current extent may cross boundary of inquiry, increase len to 2134 * requery. 2135 */ 2136 if (!compr_cluster && (map.m_flags & F2FS_MAP_MAPPED) && 2137 map.m_lblk + map.m_len - 1 == last_blk && 2138 blk_len != max_len) { 2139 blk_len = max_len; 2140 goto next; 2141 } 2142 2143 compr_appended = false; 2144 /* In a case of compressed cluster, append this to the last extent */ 2145 if (compr_cluster && ((map.m_flags & F2FS_MAP_DELALLOC) || 2146 !(map.m_flags & F2FS_MAP_FLAGS))) { 2147 compr_appended = true; 2148 goto skip_fill; 2149 } 2150 2151 if (size) { 2152 flags |= FIEMAP_EXTENT_MERGED; 2153 if (IS_ENCRYPTED(inode)) 2154 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; 2155 2156 ret = fiemap_fill_next_extent(fieinfo, logical, 2157 phys, size, flags); 2158 trace_f2fs_fiemap(inode, logical, phys, size, flags, ret); 2159 if (ret) 2160 goto out; 2161 size = 0; 2162 } 2163 2164 if (start_blk > last_blk) 2165 goto out; 2166 2167 skip_fill: 2168 if (map.m_pblk == COMPRESS_ADDR) { 2169 compr_cluster = true; 2170 count_in_cluster = 1; 2171 } else if (compr_appended) { 2172 unsigned int appended_blks = cluster_size - 2173 count_in_cluster + 1; 2174 size += F2FS_BLK_TO_BYTES(appended_blks); 2175 start_blk += appended_blks; 2176 compr_cluster = false; 2177 } else { 2178 logical = F2FS_BLK_TO_BYTES(start_blk); 2179 phys = __is_valid_data_blkaddr(map.m_pblk) ? 2180 F2FS_BLK_TO_BYTES(map.m_pblk) : 0; 2181 size = F2FS_BLK_TO_BYTES(map.m_len); 2182 flags = 0; 2183 2184 if (compr_cluster) { 2185 flags = FIEMAP_EXTENT_ENCODED; 2186 count_in_cluster += map.m_len; 2187 if (count_in_cluster == cluster_size) { 2188 compr_cluster = false; 2189 size += F2FS_BLKSIZE; 2190 } 2191 } else if (map.m_flags & F2FS_MAP_DELALLOC) { 2192 flags = FIEMAP_EXTENT_UNWRITTEN; 2193 } 2194 2195 start_blk += F2FS_BYTES_TO_BLK(size); 2196 } 2197 2198 prep_next: 2199 cond_resched(); 2200 if (fatal_signal_pending(current)) 2201 ret = -EINTR; 2202 else 2203 goto next; 2204 out: 2205 if (ret == 1) 2206 ret = 0; 2207 2208 inode_unlock_shared(inode); 2209 return ret; 2210 } 2211 2212 static inline loff_t f2fs_readpage_limit(struct inode *inode) 2213 { 2214 if (IS_ENABLED(CONFIG_FS_VERITY) && IS_VERITY(inode)) 2215 return F2FS_BLK_TO_BYTES(max_file_blocks(inode)); 2216 2217 return i_size_read(inode); 2218 } 2219 2220 static inline blk_opf_t f2fs_ra_op_flags(struct readahead_control *rac) 2221 { 2222 return rac ? REQ_RAHEAD : 0; 2223 } 2224 2225 static int f2fs_read_single_page(struct inode *inode, struct fsverity_info *vi, 2226 struct folio *folio, unsigned int nr_pages, 2227 struct f2fs_map_blocks *map, 2228 struct bio **bio_ret, 2229 sector_t *last_block_in_bio, 2230 struct readahead_control *rac) 2231 { 2232 struct bio *bio = *bio_ret; 2233 const unsigned int blocksize = F2FS_BLKSIZE; 2234 sector_t block_in_file; 2235 sector_t last_block; 2236 sector_t last_block_in_file; 2237 sector_t block_nr; 2238 pgoff_t index = folio->index; 2239 int ret = 0; 2240 2241 block_in_file = (sector_t)index; 2242 last_block = block_in_file + nr_pages; 2243 last_block_in_file = F2FS_BYTES_TO_BLK(f2fs_readpage_limit(inode) + 2244 blocksize - 1); 2245 if (last_block > last_block_in_file) 2246 last_block = last_block_in_file; 2247 2248 /* just zeroing out page which is beyond EOF */ 2249 if (block_in_file >= last_block) 2250 goto zero_out; 2251 /* 2252 * Map blocks using the previous result first. 2253 */ 2254 if (map->m_flags & F2FS_MAP_MAPPED) { 2255 if (block_in_file > map->m_lblk && 2256 block_in_file < (map->m_lblk + map->m_len)) 2257 goto got_it; 2258 } else if (block_in_file < *map->m_next_pgofs) { 2259 goto got_it; 2260 } 2261 2262 /* 2263 * Then do more f2fs_map_blocks() calls until we are 2264 * done with this page. 2265 */ 2266 map->m_lblk = block_in_file; 2267 map->m_len = last_block - block_in_file; 2268 2269 ret = f2fs_map_blocks(inode, map, F2FS_GET_BLOCK_DEFAULT); 2270 if (ret) 2271 goto out; 2272 got_it: 2273 if ((map->m_flags & F2FS_MAP_MAPPED)) { 2274 block_nr = map->m_pblk + block_in_file - map->m_lblk; 2275 folio_set_mappedtodisk(folio); 2276 2277 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr, 2278 DATA_GENERIC_ENHANCE_READ)) { 2279 ret = -EFSCORRUPTED; 2280 goto out; 2281 } 2282 } else { 2283 zero_out: 2284 folio_zero_segment(folio, 0, folio_size(folio)); 2285 if (vi && !fsverity_verify_folio(vi, folio)) { 2286 ret = -EIO; 2287 goto out; 2288 } 2289 if (!folio_test_uptodate(folio)) 2290 folio_mark_uptodate(folio); 2291 folio_unlock(folio); 2292 goto out; 2293 } 2294 2295 /* 2296 * This page will go to BIO. Do we need to send this 2297 * BIO off first? 2298 */ 2299 if (bio && (!page_is_mergeable(F2FS_I_SB(inode), bio, 2300 *last_block_in_bio, block_nr) || 2301 !f2fs_crypt_mergeable_bio(bio, inode, index, NULL))) { 2302 submit_and_realloc: 2303 f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA); 2304 bio = NULL; 2305 } 2306 if (bio == NULL) 2307 bio = f2fs_grab_read_bio(inode, vi, block_nr, nr_pages, 2308 f2fs_ra_op_flags(rac), index, false); 2309 2310 /* 2311 * If the page is under writeback, we need to wait for 2312 * its completion to see the correct decrypted data. 2313 */ 2314 f2fs_wait_on_block_writeback(inode, block_nr); 2315 2316 if (!bio_add_folio(bio, folio, blocksize, 0)) 2317 goto submit_and_realloc; 2318 2319 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA); 2320 f2fs_update_iostat(F2FS_I_SB(inode), NULL, FS_DATA_READ_IO, 2321 F2FS_BLKSIZE); 2322 *last_block_in_bio = block_nr; 2323 out: 2324 *bio_ret = bio; 2325 return ret; 2326 } 2327 2328 #ifdef CONFIG_F2FS_FS_COMPRESSION 2329 int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret, 2330 unsigned nr_pages, sector_t *last_block_in_bio, 2331 struct readahead_control *rac, bool for_write) 2332 { 2333 struct dnode_of_data dn; 2334 struct inode *inode = cc->inode; 2335 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2336 struct bio *bio = *bio_ret; 2337 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size; 2338 sector_t last_block_in_file; 2339 const unsigned int blocksize = F2FS_BLKSIZE; 2340 struct decompress_io_ctx *dic = NULL; 2341 struct extent_info ei = {}; 2342 bool from_dnode = true; 2343 int i; 2344 int ret = 0; 2345 2346 if (unlikely(f2fs_cp_error(sbi))) { 2347 ret = -EIO; 2348 from_dnode = false; 2349 goto out_put_dnode; 2350 } 2351 2352 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc)); 2353 2354 last_block_in_file = F2FS_BYTES_TO_BLK(f2fs_readpage_limit(inode) + 2355 blocksize - 1); 2356 2357 /* get rid of pages beyond EOF */ 2358 for (i = 0; i < cc->cluster_size; i++) { 2359 struct page *page = cc->rpages[i]; 2360 struct folio *folio; 2361 2362 if (!page) 2363 continue; 2364 2365 folio = page_folio(page); 2366 if ((sector_t)folio->index >= last_block_in_file) { 2367 folio_zero_segment(folio, 0, folio_size(folio)); 2368 if (!folio_test_uptodate(folio)) 2369 folio_mark_uptodate(folio); 2370 } else if (!folio_test_uptodate(folio)) { 2371 continue; 2372 } 2373 folio_unlock(folio); 2374 if (for_write) 2375 folio_put(folio); 2376 cc->rpages[i] = NULL; 2377 cc->nr_rpages--; 2378 } 2379 2380 /* we are done since all pages are beyond EOF */ 2381 if (f2fs_cluster_is_empty(cc)) 2382 goto out; 2383 2384 if (f2fs_lookup_read_extent_cache(inode, start_idx, &ei)) 2385 from_dnode = false; 2386 2387 if (!from_dnode) 2388 goto skip_reading_dnode; 2389 2390 set_new_dnode(&dn, inode, NULL, NULL, 0); 2391 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); 2392 if (ret) 2393 goto out; 2394 2395 f2fs_bug_on(sbi, dn.data_blkaddr != COMPRESS_ADDR); 2396 2397 skip_reading_dnode: 2398 for (i = 1; i < cc->cluster_size; i++) { 2399 block_t blkaddr; 2400 2401 blkaddr = from_dnode ? data_blkaddr(dn.inode, dn.node_folio, 2402 dn.ofs_in_node + i) : 2403 ei.blk + i - 1; 2404 2405 if (!__is_valid_data_blkaddr(blkaddr)) 2406 break; 2407 2408 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) { 2409 ret = -EFAULT; 2410 goto out_put_dnode; 2411 } 2412 cc->nr_cpages++; 2413 2414 if (!from_dnode && i >= ei.c_len) 2415 break; 2416 } 2417 2418 /* nothing to decompress */ 2419 if (cc->nr_cpages == 0) { 2420 ret = 0; 2421 goto out_put_dnode; 2422 } 2423 2424 dic = f2fs_alloc_dic(cc); 2425 if (IS_ERR(dic)) { 2426 ret = PTR_ERR(dic); 2427 goto out_put_dnode; 2428 } 2429 2430 for (i = 0; i < cc->nr_cpages; i++) { 2431 struct folio *folio = page_folio(dic->cpages[i]); 2432 block_t blkaddr; 2433 struct bio_post_read_ctx *ctx; 2434 2435 blkaddr = from_dnode ? data_blkaddr(dn.inode, dn.node_folio, 2436 dn.ofs_in_node + i + 1) : 2437 ei.blk + i; 2438 2439 f2fs_wait_on_block_writeback(inode, blkaddr); 2440 2441 if (f2fs_load_compressed_folio(sbi, folio, blkaddr)) { 2442 if (atomic_dec_and_test(&dic->remaining_pages)) { 2443 f2fs_decompress_cluster(dic, true); 2444 break; 2445 } 2446 continue; 2447 } 2448 2449 if (bio && (!page_is_mergeable(sbi, bio, 2450 *last_block_in_bio, blkaddr) || 2451 !f2fs_crypt_mergeable_bio(bio, inode, folio->index, NULL))) { 2452 submit_and_realloc: 2453 f2fs_submit_read_bio(sbi, bio, DATA); 2454 bio = NULL; 2455 } 2456 2457 if (!bio) 2458 bio = f2fs_grab_read_bio(inode, cc->vi, blkaddr, 2459 nr_pages - i, 2460 f2fs_ra_op_flags(rac), 2461 folio->index, for_write); 2462 2463 if (!bio_add_folio(bio, folio, blocksize, 0)) 2464 goto submit_and_realloc; 2465 2466 ctx = get_post_read_ctx(bio); 2467 ctx->enabled_steps |= STEP_DECOMPRESS; 2468 refcount_inc(&dic->refcnt); 2469 2470 inc_page_count(sbi, F2FS_RD_DATA); 2471 f2fs_update_iostat(sbi, inode, FS_DATA_READ_IO, F2FS_BLKSIZE); 2472 *last_block_in_bio = blkaddr; 2473 } 2474 2475 if (from_dnode) 2476 f2fs_put_dnode(&dn); 2477 2478 *bio_ret = bio; 2479 return 0; 2480 2481 out_put_dnode: 2482 if (from_dnode) 2483 f2fs_put_dnode(&dn); 2484 out: 2485 for (i = 0; i < cc->cluster_size; i++) { 2486 if (cc->rpages[i]) { 2487 ClearPageUptodate(cc->rpages[i]); 2488 unlock_page(cc->rpages[i]); 2489 } 2490 } 2491 *bio_ret = bio; 2492 return ret; 2493 } 2494 #endif 2495 2496 static struct f2fs_folio_state *ffs_find_or_alloc(struct folio *folio) 2497 { 2498 struct f2fs_folio_state *ffs = folio->private; 2499 2500 if (ffs) 2501 return ffs; 2502 2503 ffs = f2fs_kmem_cache_alloc(ffs_entry_slab, 2504 GFP_NOIO | __GFP_ZERO, true, NULL); 2505 2506 spin_lock_init(&ffs->state_lock); 2507 folio_attach_private(folio, ffs); 2508 return ffs; 2509 } 2510 2511 static void ffs_detach_free(struct folio *folio) 2512 { 2513 struct f2fs_folio_state *ffs; 2514 2515 if (!folio_test_large(folio)) { 2516 folio_detach_private(folio); 2517 return; 2518 } 2519 2520 ffs = folio_detach_private(folio); 2521 if (!ffs) 2522 return; 2523 2524 WARN_ON_ONCE(ffs->read_pages_pending != 0); 2525 kmem_cache_free(ffs_entry_slab, ffs); 2526 } 2527 2528 static int f2fs_read_data_large_folio(struct inode *inode, 2529 struct fsverity_info *vi, 2530 struct readahead_control *rac, struct folio *folio) 2531 { 2532 struct bio *bio = NULL; 2533 sector_t last_block_in_bio = 0; 2534 struct f2fs_map_blocks map = {0, }; 2535 pgoff_t index, offset, next_pgofs = 0; 2536 unsigned max_nr_pages = rac ? readahead_count(rac) : 2537 folio_nr_pages(folio); 2538 unsigned nrpages; 2539 struct f2fs_folio_state *ffs; 2540 int ret = 0; 2541 bool folio_in_bio = false; 2542 2543 if (!IS_IMMUTABLE(inode) || f2fs_compressed_file(inode)) { 2544 if (folio) 2545 folio_unlock(folio); 2546 return -EOPNOTSUPP; 2547 } 2548 2549 map.m_seg_type = NO_CHECK_TYPE; 2550 2551 if (rac) 2552 folio = readahead_folio(rac); 2553 next_folio: 2554 if (!folio) 2555 goto out; 2556 2557 f2fs_update_read_folio_count(F2FS_I_SB(inode), folio); 2558 2559 folio_in_bio = false; 2560 index = folio->index; 2561 offset = 0; 2562 ffs = NULL; 2563 nrpages = folio_nr_pages(folio); 2564 2565 for (; nrpages; nrpages--, max_nr_pages--, index++, offset++) { 2566 sector_t block_nr; 2567 /* 2568 * Map blocks using the previous result first. 2569 */ 2570 if (map.m_flags & F2FS_MAP_MAPPED) { 2571 if (index > map.m_lblk && 2572 index < (map.m_lblk + map.m_len)) 2573 goto got_it; 2574 } else if (index < next_pgofs) { 2575 /* hole case */ 2576 goto got_it; 2577 } 2578 2579 /* 2580 * Then do more f2fs_map_blocks() calls until we are 2581 * done with this page. 2582 */ 2583 memset(&map, 0, sizeof(map)); 2584 map.m_next_pgofs = &next_pgofs; 2585 map.m_seg_type = NO_CHECK_TYPE; 2586 map.m_lblk = index; 2587 map.m_len = max_nr_pages; 2588 2589 ret = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT); 2590 if (ret) 2591 goto err_out; 2592 got_it: 2593 if ((map.m_flags & F2FS_MAP_MAPPED)) { 2594 block_nr = map.m_pblk + index - map.m_lblk; 2595 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr, 2596 DATA_GENERIC_ENHANCE_READ)) { 2597 ret = -EFSCORRUPTED; 2598 goto err_out; 2599 } 2600 } else { 2601 size_t page_offset = offset << PAGE_SHIFT; 2602 folio_zero_range(folio, page_offset, PAGE_SIZE); 2603 if (vi && !fsverity_verify_blocks(vi, folio, PAGE_SIZE, page_offset)) { 2604 ret = -EIO; 2605 goto err_out; 2606 } 2607 continue; 2608 } 2609 2610 /* We must increment read_pages_pending before possible BIOs submitting 2611 * to prevent from premature folio_end_read() call on folio 2612 */ 2613 if (folio_test_large(folio)) { 2614 ffs = ffs_find_or_alloc(folio); 2615 2616 /* set the bitmap to wait */ 2617 spin_lock_irq(&ffs->state_lock); 2618 ffs->read_pages_pending++; 2619 spin_unlock_irq(&ffs->state_lock); 2620 } 2621 2622 /* 2623 * This page will go to BIO. Do we need to send this 2624 * BIO off first? 2625 */ 2626 if (bio && (!page_is_mergeable(F2FS_I_SB(inode), bio, 2627 last_block_in_bio, block_nr) || 2628 !f2fs_crypt_mergeable_bio(bio, inode, index, NULL))) { 2629 submit_and_realloc: 2630 f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA); 2631 bio = NULL; 2632 } 2633 if (bio == NULL) 2634 bio = f2fs_grab_read_bio(inode, vi, 2635 block_nr, max_nr_pages, 2636 f2fs_ra_op_flags(rac), 2637 index, false); 2638 2639 /* 2640 * If the page is under writeback, we need to wait for 2641 * its completion to see the correct decrypted data. 2642 */ 2643 f2fs_wait_on_block_writeback(inode, block_nr); 2644 2645 if (!bio_add_folio(bio, folio, F2FS_BLKSIZE, 2646 offset << PAGE_SHIFT)) 2647 goto submit_and_realloc; 2648 2649 folio_in_bio = true; 2650 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA); 2651 f2fs_update_iostat(F2FS_I_SB(inode), NULL, FS_DATA_READ_IO, 2652 F2FS_BLKSIZE); 2653 last_block_in_bio = block_nr; 2654 } 2655 trace_f2fs_read_folio(folio, DATA); 2656 err_out: 2657 if (!folio_in_bio) 2658 folio_end_read(folio, !ret); 2659 if (ret) 2660 goto out; 2661 if (rac) { 2662 folio = readahead_folio(rac); 2663 goto next_folio; 2664 } 2665 out: 2666 f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA); 2667 if (ret && folio_in_bio) { 2668 /* Wait bios and clear uptodate. */ 2669 folio_lock(folio); 2670 folio_clear_uptodate(folio); 2671 folio_unlock(folio); 2672 } 2673 return ret; 2674 } 2675 2676 /* 2677 * This function was originally taken from fs/mpage.c, and customized for f2fs. 2678 * Major change was from block_size == page_size in f2fs by default. 2679 */ 2680 static int f2fs_mpage_readpages(struct inode *inode, struct fsverity_info *vi, 2681 struct readahead_control *rac, struct folio *folio) 2682 { 2683 struct bio *bio = NULL; 2684 sector_t last_block_in_bio = 0; 2685 struct f2fs_map_blocks map; 2686 #ifdef CONFIG_F2FS_FS_COMPRESSION 2687 struct compress_ctx cc = { 2688 .inode = inode, 2689 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, 2690 .cluster_size = F2FS_I(inode)->i_cluster_size, 2691 .cluster_idx = NULL_CLUSTER, 2692 .rpages = NULL, 2693 .cpages = NULL, 2694 .nr_rpages = 0, 2695 .nr_cpages = 0, 2696 }; 2697 pgoff_t nc_cluster_idx = NULL_CLUSTER; 2698 pgoff_t index; 2699 #endif 2700 pgoff_t next_pgofs = 0; 2701 unsigned nr_pages = rac ? readahead_count(rac) : 1; 2702 struct address_space *mapping = rac ? rac->mapping : folio->mapping; 2703 unsigned max_nr_pages = nr_pages; 2704 int ret = 0; 2705 2706 if (mapping_large_folio_support(mapping)) 2707 return f2fs_read_data_large_folio(inode, vi, rac, folio); 2708 2709 #ifdef CONFIG_F2FS_FS_COMPRESSION 2710 if (f2fs_compressed_file(inode)) { 2711 index = rac ? readahead_index(rac) : folio->index; 2712 max_nr_pages = round_up(index + nr_pages, cc.cluster_size) - 2713 round_down(index, cc.cluster_size); 2714 } 2715 #endif 2716 2717 map.m_pblk = 0; 2718 map.m_lblk = 0; 2719 map.m_len = 0; 2720 map.m_flags = 0; 2721 map.m_next_pgofs = &next_pgofs; 2722 map.m_next_extent = NULL; 2723 map.m_seg_type = NO_CHECK_TYPE; 2724 map.m_may_create = false; 2725 2726 for (; nr_pages; nr_pages--) { 2727 if (rac) { 2728 folio = readahead_folio(rac); 2729 prefetchw(&folio->flags); 2730 } 2731 2732 f2fs_update_read_folio_count(F2FS_I_SB(inode), folio); 2733 2734 #ifdef CONFIG_F2FS_FS_COMPRESSION 2735 index = folio->index; 2736 2737 if (!f2fs_compressed_file(inode)) 2738 goto read_single_page; 2739 2740 /* there are remained compressed pages, submit them */ 2741 if (!f2fs_cluster_can_merge_page(&cc, index)) { 2742 cc.vi = vi; 2743 ret = f2fs_read_multi_pages(&cc, &bio, 2744 max_nr_pages, 2745 &last_block_in_bio, 2746 rac, false); 2747 f2fs_destroy_compress_ctx(&cc, false); 2748 if (ret) 2749 goto set_error_page; 2750 } 2751 if (cc.cluster_idx == NULL_CLUSTER) { 2752 if (nc_cluster_idx == index >> cc.log_cluster_size) 2753 goto read_single_page; 2754 2755 ret = f2fs_is_compressed_cluster(inode, index); 2756 if (ret < 0) 2757 goto set_error_page; 2758 else if (!ret) { 2759 nc_cluster_idx = 2760 index >> cc.log_cluster_size; 2761 goto read_single_page; 2762 } 2763 2764 nc_cluster_idx = NULL_CLUSTER; 2765 } 2766 ret = f2fs_init_compress_ctx(&cc); 2767 if (ret) 2768 goto set_error_page; 2769 2770 f2fs_compress_ctx_add_page(&cc, folio); 2771 2772 goto next_page; 2773 read_single_page: 2774 #endif 2775 2776 ret = f2fs_read_single_page(inode, vi, folio, max_nr_pages, 2777 &map, &bio, &last_block_in_bio, 2778 rac); 2779 if (ret) { 2780 #ifdef CONFIG_F2FS_FS_COMPRESSION 2781 set_error_page: 2782 #endif 2783 folio_zero_segment(folio, 0, folio_size(folio)); 2784 folio_unlock(folio); 2785 } 2786 #ifdef CONFIG_F2FS_FS_COMPRESSION 2787 next_page: 2788 #endif 2789 2790 #ifdef CONFIG_F2FS_FS_COMPRESSION 2791 if (f2fs_compressed_file(inode)) { 2792 /* last page */ 2793 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) { 2794 cc.vi = vi; 2795 ret = f2fs_read_multi_pages(&cc, &bio, 2796 max_nr_pages, 2797 &last_block_in_bio, 2798 rac, false); 2799 f2fs_destroy_compress_ctx(&cc, false); 2800 } 2801 } 2802 #endif 2803 } 2804 f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA); 2805 return ret; 2806 } 2807 2808 static int f2fs_read_data_folio(struct file *file, struct folio *folio) 2809 { 2810 struct inode *inode = folio->mapping->host; 2811 struct fsverity_info *vi = NULL; 2812 int ret; 2813 2814 trace_f2fs_readpage(folio, DATA); 2815 2816 if (!f2fs_is_compress_backend_ready(inode)) { 2817 folio_unlock(folio); 2818 return -EOPNOTSUPP; 2819 } 2820 2821 /* If the file has inline data, try to read it directly */ 2822 if (f2fs_has_inline_data(inode)) { 2823 ret = f2fs_read_inline_data(inode, folio); 2824 if (ret != -EAGAIN) 2825 return ret; 2826 } 2827 2828 vi = f2fs_need_verity(inode, folio->index); 2829 if (vi) 2830 fsverity_readahead(vi, folio->index, folio_nr_pages(folio)); 2831 return f2fs_mpage_readpages(inode, vi, NULL, folio); 2832 } 2833 2834 static void f2fs_readahead(struct readahead_control *rac) 2835 { 2836 struct inode *inode = rac->mapping->host; 2837 struct fsverity_info *vi = NULL; 2838 2839 trace_f2fs_readpages(inode, readahead_index(rac), readahead_count(rac)); 2840 2841 if (!f2fs_is_compress_backend_ready(inode)) 2842 return; 2843 2844 /* If the file has inline data, skip readahead */ 2845 if (f2fs_has_inline_data(inode)) 2846 return; 2847 2848 vi = f2fs_need_verity(inode, readahead_index(rac)); 2849 if (vi) 2850 fsverity_readahead(vi, readahead_index(rac), 2851 readahead_count(rac)); 2852 f2fs_mpage_readpages(inode, vi, rac, NULL); 2853 } 2854 2855 int f2fs_encrypt_one_page(struct f2fs_io_info *fio) 2856 { 2857 struct inode *inode = fio_inode(fio); 2858 struct folio *mfolio; 2859 struct page *page; 2860 2861 if (!f2fs_encrypted_file(inode)) 2862 return 0; 2863 2864 page = fio->compressed_page ? fio->compressed_page : fio->page; 2865 2866 if (fscrypt_inode_uses_inline_crypto(inode)) 2867 return 0; 2868 2869 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page_folio(page), 2870 PAGE_SIZE, 0, GFP_NOFS); 2871 if (IS_ERR(fio->encrypted_page)) 2872 return PTR_ERR(fio->encrypted_page); 2873 2874 mfolio = filemap_lock_folio(META_MAPPING(fio->sbi), fio->old_blkaddr); 2875 if (!IS_ERR(mfolio)) { 2876 if (folio_test_uptodate(mfolio)) 2877 memcpy(folio_address(mfolio), 2878 page_address(fio->encrypted_page), PAGE_SIZE); 2879 f2fs_folio_put(mfolio, true); 2880 } 2881 return 0; 2882 } 2883 2884 static inline bool check_inplace_update_policy(struct inode *inode, 2885 struct f2fs_io_info *fio) 2886 { 2887 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2888 2889 if (IS_F2FS_IPU_HONOR_OPU_WRITE(sbi) && 2890 is_inode_flag_set(inode, FI_OPU_WRITE)) 2891 return false; 2892 if (IS_F2FS_IPU_FORCE(sbi)) 2893 return true; 2894 if (IS_F2FS_IPU_SSR(sbi) && f2fs_need_SSR(sbi)) 2895 return true; 2896 if (IS_F2FS_IPU_UTIL(sbi) && utilization(sbi) > SM_I(sbi)->min_ipu_util) 2897 return true; 2898 if (IS_F2FS_IPU_SSR_UTIL(sbi) && f2fs_need_SSR(sbi) && 2899 utilization(sbi) > SM_I(sbi)->min_ipu_util) 2900 return true; 2901 2902 /* 2903 * IPU for rewrite async pages 2904 */ 2905 if (IS_F2FS_IPU_ASYNC(sbi) && fio && fio->op == REQ_OP_WRITE && 2906 !(fio->op_flags & REQ_SYNC) && !IS_ENCRYPTED(inode)) 2907 return true; 2908 2909 /* this is only set during fdatasync */ 2910 if (IS_F2FS_IPU_FSYNC(sbi) && is_inode_flag_set(inode, FI_NEED_IPU)) 2911 return true; 2912 2913 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) && 2914 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr))) 2915 return true; 2916 2917 return false; 2918 } 2919 2920 bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio) 2921 { 2922 /* swap file is migrating in aligned write mode */ 2923 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE)) 2924 return false; 2925 2926 if (f2fs_is_pinned_file(inode)) 2927 return true; 2928 2929 /* if this is cold file, we should overwrite to avoid fragmentation */ 2930 if (file_is_cold(inode) && !is_inode_flag_set(inode, FI_OPU_WRITE)) 2931 return true; 2932 2933 return check_inplace_update_policy(inode, fio); 2934 } 2935 2936 bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio) 2937 { 2938 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2939 2940 /* The below cases were checked when setting it. */ 2941 if (f2fs_is_pinned_file(inode)) 2942 return false; 2943 if (fio && is_sbi_flag_set(sbi, SBI_NEED_FSCK)) 2944 return true; 2945 if (f2fs_lfs_mode(sbi)) 2946 return true; 2947 if (S_ISDIR(inode->i_mode)) 2948 return true; 2949 if (IS_NOQUOTA(inode)) 2950 return true; 2951 if (f2fs_used_in_atomic_write(inode)) 2952 return true; 2953 /* rewrite low ratio compress data w/ OPU mode to avoid fragmentation */ 2954 if (f2fs_compressed_file(inode) && 2955 F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER && 2956 is_inode_flag_set(inode, FI_ENABLE_COMPRESS)) 2957 return true; 2958 2959 /* swap file is migrating in aligned write mode */ 2960 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE)) 2961 return true; 2962 2963 if (is_inode_flag_set(inode, FI_OPU_WRITE)) 2964 return true; 2965 2966 if (fio) { 2967 if (page_private_gcing(fio->page)) 2968 return true; 2969 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) && 2970 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr))) 2971 return true; 2972 } 2973 return false; 2974 } 2975 2976 static inline bool need_inplace_update(struct f2fs_io_info *fio) 2977 { 2978 struct inode *inode = fio_inode(fio); 2979 2980 if (f2fs_should_update_outplace(inode, fio)) 2981 return false; 2982 2983 return f2fs_should_update_inplace(inode, fio); 2984 } 2985 2986 int f2fs_do_write_data_page(struct f2fs_io_info *fio) 2987 { 2988 struct folio *folio = fio->folio; 2989 struct inode *inode = folio->mapping->host; 2990 struct dnode_of_data dn; 2991 struct node_info ni; 2992 struct f2fs_lock_context lc; 2993 bool ipu_force = false; 2994 bool atomic_commit; 2995 int err = 0; 2996 2997 /* Use COW inode to make dnode_of_data for atomic write */ 2998 atomic_commit = f2fs_is_atomic_file(inode) && 2999 folio_test_f2fs_atomic(folio); 3000 if (atomic_commit) 3001 set_new_dnode(&dn, F2FS_I(inode)->cow_inode, NULL, NULL, 0); 3002 else 3003 set_new_dnode(&dn, inode, NULL, NULL, 0); 3004 3005 if (need_inplace_update(fio) && 3006 f2fs_lookup_read_extent_cache_block(inode, folio->index, 3007 &fio->old_blkaddr)) { 3008 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr, 3009 DATA_GENERIC_ENHANCE)) 3010 return -EFSCORRUPTED; 3011 3012 ipu_force = true; 3013 fio->need_lock = LOCK_DONE; 3014 goto got_it; 3015 } 3016 3017 if (is_sbi_flag_set(fio->sbi, SBI_ENABLE_CHECKPOINT) && 3018 time_to_inject(fio->sbi, FAULT_SKIP_WRITE)) 3019 return -EINVAL; 3020 3021 /* Deadlock due to between page->lock and f2fs_lock_op */ 3022 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi, &lc)) 3023 return -EAGAIN; 3024 3025 err = f2fs_get_dnode_of_data(&dn, folio->index, LOOKUP_NODE); 3026 if (err) 3027 goto out; 3028 3029 fio->old_blkaddr = dn.data_blkaddr; 3030 3031 /* This page is already truncated */ 3032 if (fio->old_blkaddr == NULL_ADDR) { 3033 folio_clear_uptodate(folio); 3034 folio_clear_f2fs_gcing(folio); 3035 goto out_writepage; 3036 } 3037 got_it: 3038 if (__is_valid_data_blkaddr(fio->old_blkaddr) && 3039 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr, 3040 DATA_GENERIC_ENHANCE)) { 3041 err = -EFSCORRUPTED; 3042 goto out_writepage; 3043 } 3044 3045 /* wait for GCed page writeback via META_MAPPING */ 3046 if (fio->meta_gc) 3047 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr); 3048 3049 /* 3050 * If current allocation needs SSR, 3051 * it had better in-place writes for updated data. 3052 */ 3053 if (ipu_force || 3054 (__is_valid_data_blkaddr(fio->old_blkaddr) && 3055 need_inplace_update(fio))) { 3056 err = f2fs_encrypt_one_page(fio); 3057 if (err) 3058 goto out_writepage; 3059 3060 folio_start_writeback(folio); 3061 f2fs_put_dnode(&dn); 3062 if (fio->need_lock == LOCK_REQ) 3063 f2fs_unlock_op(fio->sbi, &lc); 3064 err = f2fs_inplace_write_data(fio); 3065 if (err) { 3066 if (fscrypt_inode_uses_fs_layer_crypto(inode)) 3067 fscrypt_finalize_bounce_page(&fio->encrypted_page); 3068 folio_end_writeback(folio); 3069 } else { 3070 set_inode_flag(inode, FI_UPDATE_WRITE); 3071 } 3072 trace_f2fs_do_write_data_page(folio, IPU); 3073 return err; 3074 } 3075 3076 if (fio->need_lock == LOCK_RETRY) { 3077 if (!f2fs_trylock_op(fio->sbi, &lc)) { 3078 err = -EAGAIN; 3079 goto out_writepage; 3080 } 3081 fio->need_lock = LOCK_REQ; 3082 } 3083 3084 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni, false); 3085 if (err) 3086 goto out_writepage; 3087 3088 fio->version = ni.version; 3089 3090 err = f2fs_encrypt_one_page(fio); 3091 if (err) 3092 goto out_writepage; 3093 3094 folio_start_writeback(folio); 3095 3096 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR) 3097 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false); 3098 3099 /* LFS mode write path */ 3100 f2fs_outplace_write_data(&dn, fio); 3101 trace_f2fs_do_write_data_page(folio, OPU); 3102 set_inode_flag(inode, FI_APPEND_WRITE); 3103 if (atomic_commit) 3104 folio_clear_f2fs_atomic(folio); 3105 out_writepage: 3106 f2fs_put_dnode(&dn); 3107 out: 3108 if (fio->need_lock == LOCK_REQ) 3109 f2fs_unlock_op(fio->sbi, &lc); 3110 return err; 3111 } 3112 3113 int f2fs_write_single_data_page(struct folio *folio, int *submitted, 3114 struct bio **bio, 3115 sector_t *last_block, 3116 struct writeback_control *wbc, 3117 enum iostat_type io_type, 3118 int compr_blocks, 3119 bool allow_balance) 3120 { 3121 struct inode *inode = folio->mapping->host; 3122 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3123 loff_t i_size = i_size_read(inode); 3124 const pgoff_t end_index = ((unsigned long long)i_size) 3125 >> PAGE_SHIFT; 3126 loff_t psize = (loff_t)(folio->index + 1) << PAGE_SHIFT; 3127 unsigned offset = 0; 3128 bool need_balance_fs = false; 3129 bool quota_inode = IS_NOQUOTA(inode); 3130 int err = 0; 3131 struct f2fs_io_info fio = { 3132 .sbi = sbi, 3133 .ino = inode->i_ino, 3134 .type = DATA, 3135 .op = REQ_OP_WRITE, 3136 .op_flags = wbc_to_write_flags(wbc), 3137 .old_blkaddr = NULL_ADDR, 3138 .folio = folio, 3139 .encrypted_page = NULL, 3140 .submitted = 0, 3141 .compr_blocks = compr_blocks, 3142 .need_lock = compr_blocks ? LOCK_DONE : LOCK_RETRY, 3143 .meta_gc = f2fs_meta_inode_gc_required(inode) ? 1 : 0, 3144 .io_type = io_type, 3145 .io_wbc = wbc, 3146 .bio = bio, 3147 .last_block = last_block, 3148 }; 3149 3150 trace_f2fs_writepage(folio, DATA); 3151 3152 /* we should bypass data pages to proceed the kworker jobs */ 3153 if (unlikely(f2fs_cp_error(sbi))) { 3154 mapping_set_error(folio->mapping, -EIO); 3155 /* 3156 * don't drop any dirty dentry pages for keeping lastest 3157 * directory structure. 3158 */ 3159 if (S_ISDIR(inode->i_mode) && 3160 !is_sbi_flag_set(sbi, SBI_IS_CLOSE)) 3161 goto redirty_out; 3162 3163 /* keep data pages in remount-ro mode */ 3164 if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY) 3165 goto redirty_out; 3166 goto out; 3167 } 3168 3169 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) 3170 goto redirty_out; 3171 3172 if (folio->index < end_index || 3173 f2fs_verity_in_progress(inode) || 3174 compr_blocks) 3175 goto write; 3176 3177 /* 3178 * If the offset is out-of-range of file size, 3179 * this page does not have to be written to disk. 3180 */ 3181 offset = i_size & (PAGE_SIZE - 1); 3182 if ((folio->index >= end_index + 1) || !offset) 3183 goto out; 3184 3185 folio_zero_segment(folio, offset, folio_size(folio)); 3186 write: 3187 /* Dentry/quota blocks are controlled by checkpoint */ 3188 if (S_ISDIR(inode->i_mode) || quota_inode) { 3189 struct f2fs_lock_context lc; 3190 3191 /* 3192 * We need to wait for node_write to avoid block allocation during 3193 * checkpoint. This can only happen to quota writes which can cause 3194 * the below discard race condition. 3195 */ 3196 if (quota_inode) 3197 f2fs_down_read_trace(&sbi->node_write, &lc); 3198 3199 fio.need_lock = LOCK_DONE; 3200 err = f2fs_do_write_data_page(&fio); 3201 3202 if (quota_inode) 3203 f2fs_up_read_trace(&sbi->node_write, &lc); 3204 3205 goto done; 3206 } 3207 3208 need_balance_fs = true; 3209 err = -EAGAIN; 3210 if (f2fs_has_inline_data(inode)) { 3211 err = f2fs_write_inline_data(inode, folio); 3212 if (!err) 3213 goto out; 3214 } 3215 3216 if (err == -EAGAIN) { 3217 err = f2fs_do_write_data_page(&fio); 3218 if (err == -EAGAIN) { 3219 f2fs_bug_on(sbi, compr_blocks); 3220 fio.need_lock = LOCK_REQ; 3221 err = f2fs_do_write_data_page(&fio); 3222 } 3223 } 3224 3225 if (err) { 3226 file_set_keep_isize(inode); 3227 } else { 3228 spin_lock(&F2FS_I(inode)->i_size_lock); 3229 if (F2FS_I(inode)->last_disk_size < psize) 3230 F2FS_I(inode)->last_disk_size = psize; 3231 spin_unlock(&F2FS_I(inode)->i_size_lock); 3232 } 3233 3234 done: 3235 if (err && err != -ENOENT) 3236 goto redirty_out; 3237 3238 out: 3239 inode_dec_dirty_pages(inode); 3240 if (err) { 3241 folio_clear_uptodate(folio); 3242 folio_clear_f2fs_gcing(folio); 3243 } 3244 folio_unlock(folio); 3245 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) && 3246 !F2FS_I(inode)->wb_task && allow_balance) 3247 f2fs_balance_fs(sbi, need_balance_fs); 3248 3249 if (unlikely(f2fs_cp_error(sbi))) { 3250 f2fs_submit_merged_write(sbi, DATA); 3251 if (bio && *bio) 3252 f2fs_submit_merged_ipu_write(sbi, bio, NULL); 3253 submitted = NULL; 3254 } 3255 3256 if (submitted) 3257 *submitted = fio.submitted; 3258 3259 return 0; 3260 3261 redirty_out: 3262 folio_redirty_for_writepage(wbc, folio); 3263 /* 3264 * pageout() in MM translates EAGAIN, so calls handle_write_error() 3265 * -> mapping_set_error() -> set_bit(AS_EIO, ...). 3266 * file_write_and_wait_range() will see EIO error, which is critical 3267 * to return value of fsync() followed by atomic_write failure to user. 3268 */ 3269 folio_unlock(folio); 3270 if (!err) 3271 return 1; 3272 return err; 3273 } 3274 3275 /* 3276 * This function was copied from write_cache_pages from mm/page-writeback.c. 3277 * The major change is making write step of cold data page separately from 3278 * warm/hot data page. 3279 */ 3280 static int f2fs_write_cache_pages(struct address_space *mapping, 3281 struct writeback_control *wbc, 3282 enum iostat_type io_type) 3283 { 3284 int ret = 0; 3285 int done = 0, retry = 0; 3286 struct page *pages_local[F2FS_ONSTACK_PAGES]; 3287 struct page **pages = pages_local; 3288 struct folio_batch fbatch; 3289 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); 3290 struct bio *bio = NULL; 3291 sector_t last_block; 3292 #ifdef CONFIG_F2FS_FS_COMPRESSION 3293 struct inode *inode = mapping->host; 3294 struct compress_ctx cc = { 3295 .inode = inode, 3296 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, 3297 .cluster_size = F2FS_I(inode)->i_cluster_size, 3298 .cluster_idx = NULL_CLUSTER, 3299 .rpages = NULL, 3300 .nr_rpages = 0, 3301 .cpages = NULL, 3302 .valid_nr_cpages = 0, 3303 .rbuf = NULL, 3304 .cbuf = NULL, 3305 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size, 3306 .private = NULL, 3307 }; 3308 #endif 3309 int nr_folios, p, idx; 3310 int nr_pages; 3311 unsigned int max_pages = F2FS_ONSTACK_PAGES; 3312 pgoff_t index; 3313 pgoff_t end; /* Inclusive */ 3314 pgoff_t done_index; 3315 int range_whole = 0; 3316 xa_mark_t tag; 3317 int nwritten = 0; 3318 int submitted = 0; 3319 int i; 3320 3321 #ifdef CONFIG_F2FS_FS_COMPRESSION 3322 if (f2fs_compressed_file(inode) && 3323 1 << cc.log_cluster_size > F2FS_ONSTACK_PAGES) { 3324 pages = f2fs_kzalloc(sbi, sizeof(struct page *) << 3325 cc.log_cluster_size, GFP_NOFS | __GFP_NOFAIL); 3326 max_pages = 1 << cc.log_cluster_size; 3327 } 3328 #endif 3329 3330 folio_batch_init(&fbatch); 3331 3332 if (get_dirty_pages(mapping->host) <= 3333 SM_I(F2FS_M_SB(mapping))->min_hot_blocks) 3334 set_inode_flag(mapping->host, FI_HOT_DATA); 3335 else 3336 clear_inode_flag(mapping->host, FI_HOT_DATA); 3337 3338 if (wbc->range_cyclic) { 3339 index = mapping->writeback_index; /* prev offset */ 3340 end = -1; 3341 } else { 3342 index = wbc->range_start >> PAGE_SHIFT; 3343 end = wbc->range_end >> PAGE_SHIFT; 3344 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) 3345 range_whole = 1; 3346 } 3347 tag = wbc_to_tag(wbc); 3348 retry: 3349 retry = 0; 3350 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 3351 tag_pages_for_writeback(mapping, index, end); 3352 done_index = index; 3353 while (!done && !retry && (index <= end)) { 3354 nr_pages = 0; 3355 again: 3356 nr_folios = filemap_get_folios_tag(mapping, &index, end, 3357 tag, &fbatch); 3358 if (nr_folios == 0) { 3359 if (nr_pages) 3360 goto write; 3361 break; 3362 } 3363 3364 for (i = 0; i < nr_folios; i++) { 3365 struct folio *folio = fbatch.folios[i]; 3366 3367 idx = 0; 3368 p = folio_nr_pages(folio); 3369 add_more: 3370 pages[nr_pages] = folio_page(folio, idx); 3371 folio_get(folio); 3372 if (++nr_pages == max_pages) { 3373 index = folio->index + idx + 1; 3374 folio_batch_release(&fbatch); 3375 goto write; 3376 } 3377 if (++idx < p) 3378 goto add_more; 3379 } 3380 folio_batch_release(&fbatch); 3381 goto again; 3382 write: 3383 for (i = 0; i < nr_pages; i++) { 3384 struct page *page = pages[i]; 3385 struct folio *folio = page_folio(page); 3386 bool need_readd; 3387 readd: 3388 need_readd = false; 3389 #ifdef CONFIG_F2FS_FS_COMPRESSION 3390 if (f2fs_compressed_file(inode)) { 3391 void *fsdata = NULL; 3392 struct page *pagep; 3393 int ret2; 3394 3395 ret = f2fs_init_compress_ctx(&cc); 3396 if (ret) { 3397 done = 1; 3398 break; 3399 } 3400 3401 if (!f2fs_cluster_can_merge_page(&cc, 3402 folio->index)) { 3403 ret = f2fs_write_multi_pages(&cc, 3404 &submitted, wbc, io_type); 3405 if (!ret) 3406 need_readd = true; 3407 goto result; 3408 } 3409 3410 if (unlikely(f2fs_cp_error(sbi))) 3411 goto lock_folio; 3412 3413 if (!f2fs_cluster_is_empty(&cc)) 3414 goto lock_folio; 3415 3416 if (f2fs_all_cluster_page_ready(&cc, 3417 pages, i, nr_pages, true)) 3418 goto lock_folio; 3419 3420 ret2 = f2fs_prepare_compress_overwrite( 3421 inode, &pagep, 3422 folio->index, &fsdata); 3423 if (ret2 < 0) { 3424 ret = ret2; 3425 done = 1; 3426 break; 3427 } else if (ret2 && 3428 (!f2fs_compress_write_end(inode, 3429 fsdata, folio->index, 1) || 3430 !f2fs_all_cluster_page_ready(&cc, 3431 pages, i, nr_pages, 3432 false))) { 3433 retry = 1; 3434 break; 3435 } 3436 } 3437 #endif 3438 /* give a priority to WB_SYNC threads */ 3439 if (atomic_read(&sbi->wb_sync_req[DATA]) && 3440 wbc->sync_mode == WB_SYNC_NONE) { 3441 done = 1; 3442 break; 3443 } 3444 #ifdef CONFIG_F2FS_FS_COMPRESSION 3445 lock_folio: 3446 #endif 3447 done_index = folio->index; 3448 retry_write: 3449 folio_lock(folio); 3450 3451 if (unlikely(folio->mapping != mapping)) { 3452 continue_unlock: 3453 folio_unlock(folio); 3454 continue; 3455 } 3456 3457 if (!folio_test_dirty(folio)) { 3458 /* someone wrote it for us */ 3459 goto continue_unlock; 3460 } 3461 3462 if (folio_test_writeback(folio)) { 3463 if (wbc->sync_mode == WB_SYNC_NONE) 3464 goto continue_unlock; 3465 f2fs_folio_wait_writeback(folio, DATA, true, true); 3466 } 3467 3468 if (!folio_clear_dirty_for_io(folio)) 3469 goto continue_unlock; 3470 3471 #ifdef CONFIG_F2FS_FS_COMPRESSION 3472 if (f2fs_compressed_file(inode)) { 3473 folio_get(folio); 3474 f2fs_compress_ctx_add_page(&cc, folio); 3475 continue; 3476 } 3477 #endif 3478 submitted = 0; 3479 ret = f2fs_write_single_data_page(folio, 3480 &submitted, &bio, &last_block, 3481 wbc, io_type, 0, true); 3482 #ifdef CONFIG_F2FS_FS_COMPRESSION 3483 result: 3484 #endif 3485 nwritten += submitted; 3486 wbc->nr_to_write -= submitted; 3487 3488 if (unlikely(ret)) { 3489 /* 3490 * keep nr_to_write, since vfs uses this to 3491 * get # of written pages. 3492 */ 3493 if (ret == 1) { 3494 ret = 0; 3495 goto next; 3496 } else if (ret == -EAGAIN) { 3497 ret = 0; 3498 if (wbc->sync_mode == WB_SYNC_ALL) { 3499 f2fs_schedule_timeout( 3500 DEFAULT_SCHEDULE_TIMEOUT); 3501 goto retry_write; 3502 } 3503 goto next; 3504 } 3505 done_index = folio_next_index(folio); 3506 done = 1; 3507 break; 3508 } 3509 3510 if (wbc->nr_to_write <= 0 && 3511 wbc->sync_mode == WB_SYNC_NONE) { 3512 done = 1; 3513 break; 3514 } 3515 next: 3516 if (need_readd) 3517 goto readd; 3518 } 3519 release_pages(pages, nr_pages); 3520 cond_resched(); 3521 } 3522 #ifdef CONFIG_F2FS_FS_COMPRESSION 3523 /* flush remained pages in compress cluster */ 3524 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) { 3525 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type); 3526 nwritten += submitted; 3527 wbc->nr_to_write -= submitted; 3528 if (ret) { 3529 done = 1; 3530 retry = 0; 3531 } 3532 } 3533 if (f2fs_compressed_file(inode)) 3534 f2fs_destroy_compress_ctx(&cc, false); 3535 #endif 3536 if (retry) { 3537 index = 0; 3538 end = -1; 3539 goto retry; 3540 } 3541 if (wbc->range_cyclic && !done) 3542 done_index = 0; 3543 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) 3544 mapping->writeback_index = done_index; 3545 3546 if (nwritten) 3547 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host, 3548 NULL, 0, DATA); 3549 /* submit cached bio of IPU write */ 3550 if (bio) 3551 f2fs_submit_merged_ipu_write(sbi, &bio, NULL); 3552 3553 #ifdef CONFIG_F2FS_FS_COMPRESSION 3554 if (pages != pages_local) 3555 kfree(pages); 3556 #endif 3557 3558 return ret; 3559 } 3560 3561 static inline bool __should_serialize_io(struct inode *inode, 3562 struct writeback_control *wbc) 3563 { 3564 /* to avoid deadlock in path of data flush */ 3565 if (F2FS_I(inode)->wb_task) 3566 return false; 3567 3568 if (!S_ISREG(inode->i_mode)) 3569 return false; 3570 if (IS_NOQUOTA(inode)) 3571 return false; 3572 3573 if (f2fs_is_pinned_file(inode)) 3574 return false; 3575 if (f2fs_need_compress_data(inode)) 3576 return true; 3577 if (wbc->sync_mode != WB_SYNC_ALL) 3578 return true; 3579 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks) 3580 return true; 3581 return false; 3582 } 3583 3584 static inline void account_writeback(struct inode *inode, bool inc) 3585 { 3586 if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) 3587 return; 3588 3589 f2fs_down_read(&F2FS_I(inode)->i_sem); 3590 if (inc) 3591 atomic_inc(&F2FS_I(inode)->writeback); 3592 else 3593 atomic_dec(&F2FS_I(inode)->writeback); 3594 f2fs_up_read(&F2FS_I(inode)->i_sem); 3595 } 3596 3597 static inline void update_skipped_write(struct f2fs_sb_info *sbi, 3598 struct writeback_control *wbc) 3599 { 3600 long skipped = wbc->pages_skipped; 3601 3602 if (is_sbi_flag_set(sbi, SBI_ENABLE_CHECKPOINT) && skipped && 3603 wbc->sync_mode == WB_SYNC_ALL) 3604 atomic_add(skipped, &sbi->nr_pages[F2FS_SKIPPED_WRITE]); 3605 } 3606 3607 static int __f2fs_write_data_pages(struct address_space *mapping, 3608 struct writeback_control *wbc, 3609 enum iostat_type io_type) 3610 { 3611 struct inode *inode = mapping->host; 3612 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3613 struct blk_plug plug; 3614 int ret; 3615 bool locked = false; 3616 3617 /* skip writing if there is no dirty page in this inode */ 3618 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) 3619 return 0; 3620 3621 /* during POR, we don't need to trigger writepage at all. */ 3622 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) 3623 goto skip_write; 3624 3625 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) && 3626 wbc->sync_mode == WB_SYNC_NONE && 3627 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && 3628 f2fs_available_free_memory(sbi, DIRTY_DENTS)) 3629 goto skip_write; 3630 3631 /* skip writing in file defragment preparing stage */ 3632 if (is_inode_flag_set(inode, FI_SKIP_WRITES)) 3633 goto skip_write; 3634 3635 trace_f2fs_writepages(mapping->host, wbc, DATA); 3636 3637 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */ 3638 if (wbc->sync_mode == WB_SYNC_ALL) 3639 atomic_inc(&sbi->wb_sync_req[DATA]); 3640 else if (atomic_read(&sbi->wb_sync_req[DATA])) { 3641 /* to avoid potential deadlock */ 3642 if (current->plug) 3643 blk_finish_plug(current->plug); 3644 goto skip_write; 3645 } 3646 3647 if (__should_serialize_io(inode, wbc)) { 3648 mutex_lock(&sbi->writepages); 3649 locked = true; 3650 } 3651 3652 account_writeback(inode, true); 3653 3654 blk_start_plug(&plug); 3655 ret = f2fs_write_cache_pages(mapping, wbc, io_type); 3656 blk_finish_plug(&plug); 3657 3658 account_writeback(inode, false); 3659 3660 if (locked) 3661 mutex_unlock(&sbi->writepages); 3662 3663 if (wbc->sync_mode == WB_SYNC_ALL) 3664 atomic_dec(&sbi->wb_sync_req[DATA]); 3665 /* 3666 * if some pages were truncated, we cannot guarantee its mapping->host 3667 * to detect pending bios. 3668 */ 3669 3670 f2fs_remove_dirty_inode(inode); 3671 3672 /* 3673 * f2fs_write_cache_pages() has retry logic for EAGAIN case which is 3674 * common when racing w/ checkpoint, so only update skipped write 3675 * when ret is non-zero. 3676 */ 3677 if (ret) 3678 update_skipped_write(sbi, wbc); 3679 return ret; 3680 3681 skip_write: 3682 wbc->pages_skipped += get_dirty_pages(inode); 3683 update_skipped_write(sbi, wbc); 3684 trace_f2fs_writepages(mapping->host, wbc, DATA); 3685 return 0; 3686 } 3687 3688 static int f2fs_write_data_pages(struct address_space *mapping, 3689 struct writeback_control *wbc) 3690 { 3691 struct inode *inode = mapping->host; 3692 3693 return __f2fs_write_data_pages(mapping, wbc, 3694 F2FS_I(inode)->cp_task == current ? 3695 FS_CP_DATA_IO : FS_DATA_IO); 3696 } 3697 3698 void f2fs_write_failed(struct inode *inode, loff_t to) 3699 { 3700 loff_t i_size = i_size_read(inode); 3701 3702 if (IS_NOQUOTA(inode)) 3703 return; 3704 3705 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */ 3706 if (to > i_size && !f2fs_verity_in_progress(inode)) { 3707 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 3708 filemap_invalidate_lock(inode->i_mapping); 3709 3710 truncate_pagecache(inode, i_size); 3711 f2fs_truncate_blocks(inode, i_size, true); 3712 3713 filemap_invalidate_unlock(inode->i_mapping); 3714 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 3715 } 3716 } 3717 3718 static int prepare_write_begin(struct f2fs_sb_info *sbi, 3719 struct folio *folio, loff_t pos, unsigned int len, 3720 block_t *blk_addr, bool *node_changed) 3721 { 3722 struct inode *inode = folio->mapping->host; 3723 pgoff_t index = folio->index; 3724 struct dnode_of_data dn; 3725 struct f2fs_lock_context lc; 3726 struct folio *ifolio; 3727 bool locked = false; 3728 int flag = F2FS_GET_BLOCK_PRE_AIO; 3729 int err = 0; 3730 3731 if (!f2fs_has_inline_data(inode) && !f2fs_compressed_file(inode) && 3732 (pos & PAGE_MASK) < i_size_read(inode) && 3733 f2fs_lookup_read_extent_cache_block(inode, index, blk_addr)) 3734 return 0; 3735 3736 /* 3737 * If a whole page is being written and we already preallocated all the 3738 * blocks, then there is no need to get a block address now. 3739 */ 3740 if (len == PAGE_SIZE && is_inode_flag_set(inode, FI_PREALLOCATED_ALL)) 3741 return 0; 3742 3743 /* f2fs_lock_op avoids race between write CP and convert_inline_page */ 3744 if (f2fs_has_inline_data(inode)) { 3745 if (pos + len > MAX_INLINE_DATA(inode)) 3746 flag = F2FS_GET_BLOCK_DEFAULT; 3747 f2fs_map_lock(sbi, &lc, flag); 3748 locked = true; 3749 } else if ((pos & PAGE_MASK) >= i_size_read(inode)) { 3750 f2fs_map_lock(sbi, &lc, flag); 3751 locked = true; 3752 } 3753 3754 restart: 3755 /* check inline_data */ 3756 ifolio = f2fs_get_inode_folio(sbi, inode->i_ino); 3757 if (IS_ERR(ifolio)) { 3758 err = PTR_ERR(ifolio); 3759 goto unlock_out; 3760 } 3761 3762 set_new_dnode(&dn, inode, ifolio, ifolio, 0); 3763 3764 if (f2fs_has_inline_data(inode)) { 3765 if (pos + len <= MAX_INLINE_DATA(inode)) { 3766 f2fs_do_read_inline_data(folio, ifolio); 3767 set_inode_flag(inode, FI_DATA_EXIST); 3768 if (inode->i_nlink) 3769 folio_set_f2fs_inline(ifolio); 3770 goto out; 3771 } 3772 err = f2fs_convert_inline_folio(&dn, folio); 3773 if (err || dn.data_blkaddr != NULL_ADDR) 3774 goto out; 3775 } 3776 3777 if (!f2fs_lookup_read_extent_cache_block(inode, index, 3778 &dn.data_blkaddr)) { 3779 if (IS_DEVICE_ALIASING(inode)) { 3780 err = -ENODATA; 3781 goto out; 3782 } 3783 3784 if (locked) { 3785 err = f2fs_reserve_block(&dn, index); 3786 goto out; 3787 } 3788 3789 /* hole case */ 3790 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); 3791 if (!err && dn.data_blkaddr != NULL_ADDR) 3792 goto out; 3793 f2fs_put_dnode(&dn); 3794 f2fs_map_lock(sbi, &lc, F2FS_GET_BLOCK_PRE_AIO); 3795 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO); 3796 locked = true; 3797 goto restart; 3798 } 3799 out: 3800 if (!err) { 3801 /* convert_inline_page can make node_changed */ 3802 *blk_addr = dn.data_blkaddr; 3803 *node_changed = dn.node_changed; 3804 } 3805 f2fs_put_dnode(&dn); 3806 unlock_out: 3807 if (locked) 3808 f2fs_map_unlock(sbi, &lc, flag); 3809 return err; 3810 } 3811 3812 static int __find_data_block(struct inode *inode, pgoff_t index, 3813 block_t *blk_addr) 3814 { 3815 struct dnode_of_data dn; 3816 struct folio *ifolio; 3817 int err = 0; 3818 3819 ifolio = f2fs_get_inode_folio(F2FS_I_SB(inode), inode->i_ino); 3820 if (IS_ERR(ifolio)) 3821 return PTR_ERR(ifolio); 3822 3823 set_new_dnode(&dn, inode, ifolio, ifolio, 0); 3824 3825 if (!f2fs_lookup_read_extent_cache_block(inode, index, 3826 &dn.data_blkaddr)) { 3827 /* hole case */ 3828 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); 3829 if (err) { 3830 dn.data_blkaddr = NULL_ADDR; 3831 err = 0; 3832 } 3833 } 3834 *blk_addr = dn.data_blkaddr; 3835 f2fs_put_dnode(&dn); 3836 return err; 3837 } 3838 3839 static int __reserve_data_block(struct inode *inode, pgoff_t index, 3840 block_t *blk_addr, bool *node_changed) 3841 { 3842 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3843 struct dnode_of_data dn; 3844 struct f2fs_lock_context lc; 3845 struct folio *ifolio; 3846 int err = 0; 3847 3848 f2fs_map_lock(sbi, &lc, F2FS_GET_BLOCK_PRE_AIO); 3849 3850 ifolio = f2fs_get_inode_folio(sbi, inode->i_ino); 3851 if (IS_ERR(ifolio)) { 3852 err = PTR_ERR(ifolio); 3853 goto unlock_out; 3854 } 3855 set_new_dnode(&dn, inode, ifolio, ifolio, 0); 3856 3857 if (!f2fs_lookup_read_extent_cache_block(dn.inode, index, 3858 &dn.data_blkaddr)) 3859 err = f2fs_reserve_block(&dn, index); 3860 3861 *blk_addr = dn.data_blkaddr; 3862 *node_changed = dn.node_changed; 3863 f2fs_put_dnode(&dn); 3864 3865 unlock_out: 3866 f2fs_map_unlock(sbi, &lc, F2FS_GET_BLOCK_PRE_AIO); 3867 return err; 3868 } 3869 3870 static int prepare_atomic_write_begin(struct f2fs_sb_info *sbi, 3871 struct folio *folio, loff_t pos, unsigned int len, 3872 block_t *blk_addr, bool *node_changed) 3873 { 3874 struct inode *inode = folio->mapping->host; 3875 struct inode *cow_inode = F2FS_I(inode)->cow_inode; 3876 pgoff_t index = folio->index; 3877 int err = 0; 3878 block_t ori_blk_addr = NULL_ADDR; 3879 bool cow_has_reserved_block = false; 3880 3881 /* If pos is beyond the end of file, reserve a new block in COW inode */ 3882 if ((pos & PAGE_MASK) >= i_size_read(inode)) 3883 goto reserve_block; 3884 3885 /* Look for the block in COW inode first */ 3886 err = __find_data_block(cow_inode, index, blk_addr); 3887 if (err) 3888 return err; 3889 3890 if (__is_valid_data_blkaddr(*blk_addr)) 3891 return 0; 3892 3893 if (*blk_addr == NEW_ADDR) 3894 cow_has_reserved_block = true; 3895 3896 if (is_inode_flag_set(inode, FI_ATOMIC_REPLACE)) 3897 goto reserve_block; 3898 3899 /* Look for the block in the original inode */ 3900 err = __find_data_block(inode, index, &ori_blk_addr); 3901 if (err) 3902 return err; 3903 3904 reserve_block: 3905 /* Finally, we should reserve a new block in COW inode for the update */ 3906 if (!cow_has_reserved_block) { 3907 err = __reserve_data_block(cow_inode, index, blk_addr, 3908 node_changed); 3909 if (err) 3910 return err; 3911 inc_atomic_write_cnt(inode); 3912 } 3913 3914 if (ori_blk_addr != NULL_ADDR) 3915 *blk_addr = ori_blk_addr; 3916 return 0; 3917 } 3918 3919 static int f2fs_write_begin(const struct kiocb *iocb, 3920 struct address_space *mapping, 3921 loff_t pos, unsigned len, struct folio **foliop, 3922 void **fsdata) 3923 { 3924 struct inode *inode = mapping->host; 3925 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3926 struct folio *folio; 3927 pgoff_t index = pos >> PAGE_SHIFT; 3928 bool need_balance = false; 3929 block_t blkaddr = NULL_ADDR; 3930 int err = 0; 3931 3932 trace_f2fs_write_begin(inode, pos, len); 3933 3934 if (!f2fs_is_checkpoint_ready(sbi)) { 3935 err = -ENOSPC; 3936 goto fail; 3937 } 3938 3939 /* 3940 * We should check this at this moment to avoid deadlock on inode page 3941 * and #0 page. The locking rule for inline_data conversion should be: 3942 * folio_lock(folio #0) -> folio_lock(inode_page) 3943 */ 3944 if (index != 0) { 3945 err = f2fs_convert_inline_inode(inode); 3946 if (err) 3947 goto fail; 3948 } 3949 3950 #ifdef CONFIG_F2FS_FS_COMPRESSION 3951 if (f2fs_compressed_file(inode)) { 3952 int ret; 3953 struct page *page; 3954 3955 *fsdata = NULL; 3956 3957 if (len == PAGE_SIZE && !(f2fs_is_atomic_file(inode))) 3958 goto repeat; 3959 3960 ret = f2fs_prepare_compress_overwrite(inode, &page, 3961 index, fsdata); 3962 if (ret < 0) { 3963 err = ret; 3964 goto fail; 3965 } else if (ret) { 3966 *foliop = page_folio(page); 3967 return 0; 3968 } 3969 } 3970 #endif 3971 3972 repeat: 3973 /* 3974 * Do not use FGP_STABLE to avoid deadlock. 3975 * Will wait that below with our IO control. 3976 */ 3977 folio = f2fs_filemap_get_folio(mapping, index, 3978 FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_NOFS, 3979 mapping_gfp_mask(mapping)); 3980 if (IS_ERR(folio)) { 3981 err = PTR_ERR(folio); 3982 goto fail; 3983 } 3984 3985 /* TODO: cluster can be compressed due to race with .writepage */ 3986 3987 *foliop = folio; 3988 3989 if (f2fs_is_atomic_file(inode)) 3990 err = prepare_atomic_write_begin(sbi, folio, pos, len, 3991 &blkaddr, &need_balance); 3992 else 3993 err = prepare_write_begin(sbi, folio, pos, len, 3994 &blkaddr, &need_balance); 3995 if (err) 3996 goto put_folio; 3997 3998 if (need_balance && !IS_NOQUOTA(inode) && 3999 has_not_enough_free_secs(sbi, 0, 0)) { 4000 folio_unlock(folio); 4001 f2fs_balance_fs(sbi, true); 4002 folio_lock(folio); 4003 if (folio->mapping != mapping) { 4004 /* The folio got truncated from under us */ 4005 folio_unlock(folio); 4006 folio_put(folio); 4007 goto repeat; 4008 } 4009 } 4010 4011 f2fs_folio_wait_writeback(folio, DATA, false, true); 4012 4013 if (len == folio_size(folio) || folio_test_uptodate(folio)) 4014 return 0; 4015 4016 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) && 4017 !f2fs_verity_in_progress(inode)) { 4018 folio_zero_segment(folio, len, folio_size(folio)); 4019 return 0; 4020 } 4021 4022 if (blkaddr == NEW_ADDR) { 4023 folio_zero_segment(folio, 0, folio_size(folio)); 4024 folio_mark_uptodate(folio); 4025 } else { 4026 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, 4027 DATA_GENERIC_ENHANCE_READ)) { 4028 err = -EFSCORRUPTED; 4029 goto put_folio; 4030 } 4031 /* 4032 * Although the block may be stored in the COW inode, the folio 4033 * belongs to @inode and its data was encrypted (or not) using 4034 * @inode's context (see f2fs_encrypt_one_page()). Read with 4035 * @inode so the post-read decryption decision matches the 4036 * folio's owner; otherwise an unencrypted @inode whose COW inode 4037 * is encrypted hits a NULL ->i_crypt_info on decryption. 4038 */ 4039 f2fs_submit_page_read(inode, 4040 NULL, /* can't write to fsverity files */ 4041 folio, blkaddr, 0, true); 4042 4043 folio_lock(folio); 4044 if (unlikely(folio->mapping != mapping)) { 4045 folio_unlock(folio); 4046 folio_put(folio); 4047 goto repeat; 4048 } 4049 if (unlikely(!folio_test_uptodate(folio))) { 4050 err = -EIO; 4051 goto put_folio; 4052 } 4053 } 4054 return 0; 4055 4056 put_folio: 4057 f2fs_folio_put(folio, true); 4058 fail: 4059 f2fs_write_failed(inode, pos + len); 4060 return err; 4061 } 4062 4063 static int f2fs_write_end(const struct kiocb *iocb, 4064 struct address_space *mapping, 4065 loff_t pos, unsigned len, unsigned copied, 4066 struct folio *folio, void *fsdata) 4067 { 4068 struct inode *inode = folio->mapping->host; 4069 4070 trace_f2fs_write_end(inode, pos, len, copied); 4071 4072 /* 4073 * This should be come from len == PAGE_SIZE, and we expect copied 4074 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and 4075 * let generic_perform_write() try to copy data again through copied=0. 4076 */ 4077 if (!folio_test_uptodate(folio)) { 4078 if (unlikely(copied != len)) 4079 copied = 0; 4080 else 4081 folio_mark_uptodate(folio); 4082 } 4083 4084 #ifdef CONFIG_F2FS_FS_COMPRESSION 4085 /* overwrite compressed file */ 4086 if (f2fs_compressed_file(inode) && fsdata) { 4087 f2fs_compress_write_end(inode, fsdata, folio->index, copied); 4088 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); 4089 4090 if (pos + copied > i_size_read(inode) && 4091 !f2fs_verity_in_progress(inode)) 4092 f2fs_i_size_write(inode, pos + copied); 4093 return copied; 4094 } 4095 #endif 4096 4097 if (!copied) 4098 goto unlock_out; 4099 4100 folio_mark_dirty(folio); 4101 4102 if (f2fs_is_atomic_file(inode)) 4103 folio_set_f2fs_atomic(folio); 4104 4105 if (pos + copied > i_size_read(inode) && 4106 !f2fs_verity_in_progress(inode)) { 4107 f2fs_i_size_write(inode, pos + copied); 4108 if (f2fs_is_atomic_file(inode)) 4109 f2fs_i_size_write(F2FS_I(inode)->cow_inode, 4110 pos + copied); 4111 } 4112 unlock_out: 4113 f2fs_folio_put(folio, true); 4114 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); 4115 return copied; 4116 } 4117 4118 void f2fs_invalidate_folio(struct folio *folio, size_t offset, size_t length) 4119 { 4120 struct inode *inode = folio->mapping->host; 4121 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4122 4123 if (inode->i_ino >= F2FS_ROOT_INO(sbi) && 4124 (offset || length != folio_size(folio))) 4125 return; 4126 4127 if (folio_test_dirty(folio)) { 4128 if (inode->i_ino == F2FS_META_INO(sbi)) { 4129 dec_page_count(sbi, F2FS_DIRTY_META); 4130 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { 4131 dec_page_count(sbi, F2FS_DIRTY_NODES); 4132 } else { 4133 inode_dec_dirty_pages(inode); 4134 f2fs_remove_dirty_inode(inode); 4135 } 4136 } 4137 4138 if (offset || length != folio_size(folio)) 4139 return; 4140 4141 folio_cancel_dirty(folio); 4142 ffs_detach_free(folio); 4143 } 4144 4145 bool f2fs_release_folio(struct folio *folio, gfp_t wait) 4146 { 4147 /* If this is dirty folio, keep private data */ 4148 if (folio_test_dirty(folio)) 4149 return false; 4150 4151 ffs_detach_free(folio); 4152 return true; 4153 } 4154 4155 static bool f2fs_dirty_data_folio(struct address_space *mapping, 4156 struct folio *folio) 4157 { 4158 struct inode *inode = mapping->host; 4159 4160 trace_f2fs_set_page_dirty(folio, DATA); 4161 4162 if (!folio_test_uptodate(folio)) 4163 folio_mark_uptodate(folio); 4164 BUG_ON(folio_test_swapcache(folio)); 4165 4166 if (filemap_dirty_folio(mapping, folio)) { 4167 f2fs_update_dirty_folio(inode, folio); 4168 return true; 4169 } 4170 return false; 4171 } 4172 4173 4174 static sector_t f2fs_bmap_compress(struct inode *inode, sector_t block) 4175 { 4176 #ifdef CONFIG_F2FS_FS_COMPRESSION 4177 struct dnode_of_data dn; 4178 sector_t start_idx, blknr = 0; 4179 int ret; 4180 4181 start_idx = round_down(block, F2FS_I(inode)->i_cluster_size); 4182 4183 set_new_dnode(&dn, inode, NULL, NULL, 0); 4184 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); 4185 if (ret) 4186 return 0; 4187 4188 if (dn.data_blkaddr != COMPRESS_ADDR) { 4189 dn.ofs_in_node += block - start_idx; 4190 blknr = f2fs_data_blkaddr(&dn); 4191 if (!__is_valid_data_blkaddr(blknr)) 4192 blknr = 0; 4193 } 4194 4195 f2fs_put_dnode(&dn); 4196 return blknr; 4197 #else 4198 return 0; 4199 #endif 4200 } 4201 4202 4203 static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) 4204 { 4205 struct inode *inode = mapping->host; 4206 sector_t blknr = 0; 4207 4208 if (f2fs_has_inline_data(inode)) 4209 goto out; 4210 4211 /* make sure allocating whole blocks */ 4212 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) 4213 filemap_write_and_wait(mapping); 4214 4215 /* Block number less than F2FS MAX BLOCKS */ 4216 if (unlikely(block >= max_file_blocks(inode))) 4217 goto out; 4218 4219 if (f2fs_compressed_file(inode)) { 4220 blknr = f2fs_bmap_compress(inode, block); 4221 } else { 4222 struct f2fs_map_blocks map; 4223 4224 memset(&map, 0, sizeof(map)); 4225 map.m_lblk = block; 4226 map.m_len = 1; 4227 map.m_next_pgofs = NULL; 4228 map.m_seg_type = NO_CHECK_TYPE; 4229 4230 if (!f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_BMAP)) 4231 blknr = map.m_pblk; 4232 } 4233 out: 4234 trace_f2fs_bmap(inode, block, blknr); 4235 return blknr; 4236 } 4237 4238 #ifdef CONFIG_SWAP 4239 static int f2fs_migrate_blocks(struct inode *inode, block_t start_blk, 4240 unsigned int blkcnt) 4241 { 4242 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4243 unsigned int blkofs; 4244 unsigned int blk_per_sec = BLKS_PER_SEC(sbi); 4245 unsigned int end_blk = start_blk + blkcnt - 1; 4246 unsigned int secidx = start_blk / blk_per_sec; 4247 unsigned int end_sec; 4248 int ret = 0; 4249 4250 if (!blkcnt) 4251 return 0; 4252 end_sec = end_blk / blk_per_sec; 4253 4254 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 4255 filemap_invalidate_lock(inode->i_mapping); 4256 4257 set_inode_flag(inode, FI_ALIGNED_WRITE); 4258 set_inode_flag(inode, FI_OPU_WRITE); 4259 4260 for (; secidx <= end_sec; secidx++) { 4261 unsigned int blkofs_end = secidx == end_sec ? 4262 end_blk % blk_per_sec : blk_per_sec - 1; 4263 4264 f2fs_down_write(&sbi->pin_sem); 4265 4266 ret = f2fs_allocate_pinning_section(sbi); 4267 if (ret) { 4268 f2fs_up_write(&sbi->pin_sem); 4269 break; 4270 } 4271 4272 set_inode_flag(inode, FI_SKIP_WRITES); 4273 4274 for (blkofs = 0; blkofs <= blkofs_end; blkofs++) { 4275 struct folio *folio; 4276 unsigned int blkidx = secidx * blk_per_sec + blkofs; 4277 4278 folio = f2fs_get_lock_data_folio(inode, blkidx, true); 4279 if (IS_ERR(folio)) { 4280 f2fs_up_write(&sbi->pin_sem); 4281 ret = PTR_ERR(folio); 4282 goto done; 4283 } 4284 4285 folio_mark_dirty(folio); 4286 f2fs_folio_put(folio, true); 4287 } 4288 4289 clear_inode_flag(inode, FI_SKIP_WRITES); 4290 4291 ret = filemap_fdatawrite(inode->i_mapping); 4292 4293 f2fs_up_write(&sbi->pin_sem); 4294 4295 if (ret) 4296 break; 4297 } 4298 4299 done: 4300 clear_inode_flag(inode, FI_SKIP_WRITES); 4301 clear_inode_flag(inode, FI_OPU_WRITE); 4302 clear_inode_flag(inode, FI_ALIGNED_WRITE); 4303 4304 filemap_invalidate_unlock(inode->i_mapping); 4305 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 4306 4307 return ret; 4308 } 4309 4310 static int check_swap_activate(struct swap_info_struct *sis, 4311 struct file *swap_file, sector_t *span) 4312 { 4313 struct address_space *mapping = swap_file->f_mapping; 4314 struct inode *inode = mapping->host; 4315 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4316 block_t cur_lblock; 4317 block_t last_lblock; 4318 block_t pblock; 4319 block_t lowest_pblock = -1; 4320 block_t highest_pblock = 0; 4321 int nr_extents = 0; 4322 unsigned int nr_pblocks; 4323 unsigned int blks_per_sec = BLKS_PER_SEC(sbi); 4324 unsigned int not_aligned = 0; 4325 int ret = 0; 4326 4327 /* 4328 * Map all the blocks into the extent list. This code doesn't try 4329 * to be very smart. 4330 */ 4331 cur_lblock = 0; 4332 last_lblock = F2FS_BYTES_TO_BLK(i_size_read(inode)); 4333 4334 while (cur_lblock < last_lblock && cur_lblock < sis->max) { 4335 struct f2fs_map_blocks map; 4336 bool last_extent = false; 4337 retry: 4338 cond_resched(); 4339 4340 memset(&map, 0, sizeof(map)); 4341 map.m_lblk = cur_lblock; 4342 map.m_len = last_lblock - cur_lblock; 4343 map.m_next_pgofs = NULL; 4344 map.m_next_extent = NULL; 4345 map.m_seg_type = NO_CHECK_TYPE; 4346 map.m_may_create = false; 4347 4348 ret = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_FIEMAP); 4349 if (ret) 4350 goto out; 4351 4352 /* hole */ 4353 if (!(map.m_flags & F2FS_MAP_FLAGS)) { 4354 f2fs_err(sbi, "Swapfile has holes"); 4355 ret = -EINVAL; 4356 goto out; 4357 } 4358 4359 pblock = map.m_pblk; 4360 nr_pblocks = map.m_len; 4361 4362 if (!last_extent && 4363 ((pblock - SM_I(sbi)->main_blkaddr) % blks_per_sec || 4364 nr_pblocks % blks_per_sec || 4365 f2fs_is_sequential_zone_area(sbi, pblock))) { 4366 not_aligned++; 4367 4368 nr_pblocks = roundup(nr_pblocks, blks_per_sec); 4369 if (cur_lblock + nr_pblocks > sis->max) 4370 nr_pblocks -= blks_per_sec; 4371 4372 /* this extent is last one */ 4373 if (!nr_pblocks) { 4374 nr_pblocks = last_lblock - cur_lblock; 4375 last_extent = true; 4376 } 4377 4378 ret = f2fs_migrate_blocks(inode, cur_lblock, 4379 nr_pblocks); 4380 if (ret) { 4381 if (ret == -ENOENT) 4382 ret = -EINVAL; 4383 goto out; 4384 } 4385 4386 /* lookup block mapping info after block migration */ 4387 goto retry; 4388 } 4389 4390 if (cur_lblock + nr_pblocks >= sis->max) 4391 nr_pblocks = sis->max - cur_lblock; 4392 4393 if (cur_lblock) { /* exclude the header page */ 4394 if (pblock < lowest_pblock) 4395 lowest_pblock = pblock; 4396 if (pblock + nr_pblocks - 1 > highest_pblock) 4397 highest_pblock = pblock + nr_pblocks - 1; 4398 } 4399 4400 /* 4401 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks 4402 */ 4403 ret = add_swap_extent(sis, cur_lblock, nr_pblocks, pblock); 4404 if (ret < 0) 4405 goto out; 4406 nr_extents += ret; 4407 cur_lblock += nr_pblocks; 4408 } 4409 ret = nr_extents; 4410 *span = 1 + highest_pblock - lowest_pblock; 4411 if (cur_lblock == 0) 4412 cur_lblock = 1; /* force Empty message */ 4413 sis->max = cur_lblock; 4414 sis->pages = cur_lblock - 1; 4415 out: 4416 if (not_aligned) 4417 f2fs_warn(sbi, "Swapfile (%u) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(%lu * N)", 4418 not_aligned, blks_per_sec * F2FS_BLKSIZE); 4419 return ret; 4420 } 4421 4422 static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file, 4423 sector_t *span) 4424 { 4425 struct inode *inode = file_inode(file); 4426 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4427 int ret; 4428 4429 if (!S_ISREG(inode->i_mode)) 4430 return -EINVAL; 4431 4432 if (f2fs_readonly(sbi->sb)) 4433 return -EROFS; 4434 4435 if (f2fs_lfs_mode(sbi) && !f2fs_sb_has_blkzoned(sbi)) { 4436 f2fs_err(sbi, "Swapfile not supported in LFS mode"); 4437 return -EINVAL; 4438 } 4439 4440 ret = f2fs_convert_inline_inode(inode); 4441 if (ret) 4442 return ret; 4443 4444 if (!f2fs_disable_compressed_file(inode)) 4445 return -EINVAL; 4446 4447 ret = filemap_fdatawrite(inode->i_mapping); 4448 if (ret < 0) 4449 return ret; 4450 4451 f2fs_precache_extents(inode); 4452 4453 ret = check_swap_activate(sis, file, span); 4454 if (ret < 0) 4455 return ret; 4456 4457 stat_inc_swapfile_inode(inode); 4458 set_inode_flag(inode, FI_PIN_FILE); 4459 f2fs_update_time(sbi, REQ_TIME); 4460 return ret; 4461 } 4462 4463 static void f2fs_swap_deactivate(struct file *file) 4464 { 4465 struct inode *inode = file_inode(file); 4466 4467 stat_dec_swapfile_inode(inode); 4468 clear_inode_flag(inode, FI_PIN_FILE); 4469 } 4470 #else 4471 static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file, 4472 sector_t *span) 4473 { 4474 return -EOPNOTSUPP; 4475 } 4476 4477 static void f2fs_swap_deactivate(struct file *file) 4478 { 4479 } 4480 #endif 4481 4482 const struct address_space_operations f2fs_dblock_aops = { 4483 .read_folio = f2fs_read_data_folio, 4484 .readahead = f2fs_readahead, 4485 .writepages = f2fs_write_data_pages, 4486 .write_begin = f2fs_write_begin, 4487 .write_end = f2fs_write_end, 4488 .dirty_folio = f2fs_dirty_data_folio, 4489 .migrate_folio = filemap_migrate_folio, 4490 .invalidate_folio = f2fs_invalidate_folio, 4491 .release_folio = f2fs_release_folio, 4492 .bmap = f2fs_bmap, 4493 .swap_activate = f2fs_swap_activate, 4494 .swap_deactivate = f2fs_swap_deactivate, 4495 }; 4496 4497 void f2fs_clear_page_cache_dirty_tag(struct folio *folio) 4498 { 4499 struct address_space *mapping = folio->mapping; 4500 unsigned long flags; 4501 4502 xa_lock_irqsave(&mapping->i_pages, flags); 4503 __xa_clear_mark(&mapping->i_pages, folio->index, 4504 PAGECACHE_TAG_DIRTY); 4505 xa_unlock_irqrestore(&mapping->i_pages, flags); 4506 } 4507 4508 int __init f2fs_init_post_read_processing(void) 4509 { 4510 bio_post_read_ctx_cache = 4511 kmem_cache_create("f2fs_bio_post_read_ctx", 4512 sizeof(struct bio_post_read_ctx), 0, 0, NULL); 4513 if (!bio_post_read_ctx_cache) 4514 goto fail; 4515 bio_post_read_ctx_pool = 4516 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS, 4517 bio_post_read_ctx_cache); 4518 if (!bio_post_read_ctx_pool) 4519 goto fail_free_cache; 4520 return 0; 4521 4522 fail_free_cache: 4523 kmem_cache_destroy(bio_post_read_ctx_cache); 4524 fail: 4525 return -ENOMEM; 4526 } 4527 4528 void f2fs_destroy_post_read_processing(void) 4529 { 4530 mempool_destroy(bio_post_read_ctx_pool); 4531 kmem_cache_destroy(bio_post_read_ctx_cache); 4532 } 4533 4534 int f2fs_init_wq(struct f2fs_sb_info *sbi) 4535 { 4536 sbi->wq = alloc_workqueue("f2fs_wq", WQ_UNBOUND | WQ_HIGHPRI, 4537 num_online_cpus()); 4538 return sbi->wq ? 0 : -ENOMEM; 4539 } 4540 4541 void f2fs_destroy_wq(struct f2fs_sb_info *sbi) 4542 { 4543 if (sbi->wq) 4544 destroy_workqueue(sbi->wq); 4545 } 4546 4547 int __init f2fs_init_bio_entry_cache(void) 4548 { 4549 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab", 4550 sizeof(struct bio_entry)); 4551 4552 if (!bio_entry_slab) 4553 return -ENOMEM; 4554 4555 ffs_entry_slab = f2fs_kmem_cache_create("f2fs_ffs_slab", 4556 sizeof(struct f2fs_folio_state)); 4557 4558 if (!ffs_entry_slab) { 4559 kmem_cache_destroy(bio_entry_slab); 4560 return -ENOMEM; 4561 } 4562 4563 return 0; 4564 } 4565 4566 void f2fs_destroy_bio_entry_cache(void) 4567 { 4568 kmem_cache_destroy(bio_entry_slab); 4569 kmem_cache_destroy(ffs_entry_slab); 4570 } 4571 4572 static int f2fs_iomap_begin(struct inode *inode, loff_t offset, loff_t length, 4573 unsigned int flags, struct iomap *iomap, 4574 struct iomap *srcmap) 4575 { 4576 struct f2fs_map_blocks map = { NULL, }; 4577 pgoff_t next_pgofs = 0; 4578 int err; 4579 4580 map.m_lblk = F2FS_BYTES_TO_BLK(offset); 4581 map.m_len = F2FS_BYTES_TO_BLK(offset + length - 1) - map.m_lblk + 1; 4582 map.m_next_pgofs = &next_pgofs; 4583 map.m_seg_type = f2fs_rw_hint_to_seg_type(F2FS_I_SB(inode), 4584 inode->i_write_hint); 4585 if (flags & IOMAP_WRITE && iomap->private) { 4586 map.m_last_pblk = (unsigned long)iomap->private; 4587 iomap->private = NULL; 4588 } 4589 4590 /* 4591 * If the blocks being overwritten are already allocated, 4592 * f2fs_map_lock and f2fs_balance_fs are not necessary. 4593 */ 4594 if ((flags & IOMAP_WRITE) && 4595 !__f2fs_overwrite_io(inode, offset, length, true)) 4596 map.m_may_create = true; 4597 4598 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DIO); 4599 if (err) 4600 return err; 4601 4602 iomap->offset = F2FS_BLK_TO_BYTES(map.m_lblk); 4603 4604 /* 4605 * When inline encryption is enabled, sometimes I/O to an encrypted file 4606 * has to be broken up to guarantee DUN contiguity. Handle this by 4607 * limiting the length of the mapping returned. 4608 */ 4609 map.m_len = fscrypt_limit_io_blocks(inode, map.m_lblk, map.m_len); 4610 4611 /* 4612 * We should never see delalloc or compressed extents here based on 4613 * prior flushing and checks. 4614 */ 4615 if (WARN_ON_ONCE(map.m_pblk == COMPRESS_ADDR)) 4616 return -EINVAL; 4617 4618 if (map.m_flags & F2FS_MAP_MAPPED) { 4619 if (WARN_ON_ONCE(map.m_pblk == NEW_ADDR)) 4620 return -EINVAL; 4621 4622 iomap->length = F2FS_BLK_TO_BYTES(map.m_len); 4623 iomap->type = IOMAP_MAPPED; 4624 iomap->flags |= IOMAP_F_MERGED; 4625 iomap->bdev = map.m_bdev; 4626 iomap->addr = F2FS_BLK_TO_BYTES(map.m_pblk); 4627 4628 if (flags & IOMAP_WRITE && map.m_last_pblk) 4629 iomap->private = (void *)map.m_last_pblk; 4630 } else { 4631 if (flags & IOMAP_WRITE) 4632 return -ENOTBLK; 4633 4634 if (map.m_pblk == NULL_ADDR) { 4635 iomap->length = F2FS_BLK_TO_BYTES(next_pgofs) - 4636 iomap->offset; 4637 iomap->type = IOMAP_HOLE; 4638 } else if (map.m_pblk == NEW_ADDR) { 4639 iomap->length = F2FS_BLK_TO_BYTES(map.m_len); 4640 iomap->type = IOMAP_UNWRITTEN; 4641 } else { 4642 f2fs_bug_on(F2FS_I_SB(inode), 1); 4643 } 4644 iomap->addr = IOMAP_NULL_ADDR; 4645 } 4646 4647 if (map.m_flags & F2FS_MAP_NEW) 4648 iomap->flags |= IOMAP_F_NEW; 4649 if ((inode_state_read_once(inode) & I_DIRTY_DATASYNC) || 4650 offset + length > i_size_read(inode)) 4651 iomap->flags |= IOMAP_F_DIRTY; 4652 4653 return 0; 4654 } 4655 4656 const struct iomap_ops f2fs_iomap_ops = { 4657 .iomap_begin = f2fs_iomap_begin, 4658 }; 4659