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1// SPDX-License-Identifier: GPL-2.02/*3 * fs/f2fs/data.c4 *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/pagevec.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 24#include "f2fs.h"25#include "node.h"26#include "segment.h"27#include "iostat.h"28#include <trace/events/f2fs.h>29 30#define NUM_PREALLOC_POST_READ_CTXS 12831 32static struct kmem_cache *bio_post_read_ctx_cache;33static struct kmem_cache *bio_entry_slab;34static mempool_t *bio_post_read_ctx_pool;35static struct bio_set f2fs_bioset;36 37#define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE38 39int __init f2fs_init_bioset(void)40{41 return bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE,42 0, BIOSET_NEED_BVECS);43}44 45void f2fs_destroy_bioset(void)46{47 bioset_exit(&f2fs_bioset);48}49 50bool f2fs_is_cp_guaranteed(struct page *page)51{52 struct address_space *mapping = page->mapping;53 struct inode *inode;54 struct f2fs_sb_info *sbi;55 56 if (!mapping)57 return false;58 59 inode = mapping->host;60 sbi = F2FS_I_SB(inode);61 62 if (inode->i_ino == F2FS_META_INO(sbi) ||63 inode->i_ino == F2FS_NODE_INO(sbi) ||64 S_ISDIR(inode->i_mode))65 return true;66 67 if ((S_ISREG(inode->i_mode) && IS_NOQUOTA(inode)) ||68 page_private_gcing(page))69 return true;70 return false;71}72 73static enum count_type __read_io_type(struct page *page)74{75 struct address_space *mapping = page_file_mapping(page);76 77 if (mapping) {78 struct inode *inode = mapping->host;79 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);80 81 if (inode->i_ino == F2FS_META_INO(sbi))82 return F2FS_RD_META;83 84 if (inode->i_ino == F2FS_NODE_INO(sbi))85 return F2FS_RD_NODE;86 }87 return F2FS_RD_DATA;88}89 90/* postprocessing steps for read bios */91enum bio_post_read_step {92#ifdef CONFIG_FS_ENCRYPTION93 STEP_DECRYPT = BIT(0),94#else95 STEP_DECRYPT = 0, /* compile out the decryption-related code */96#endif97#ifdef CONFIG_F2FS_FS_COMPRESSION98 STEP_DECOMPRESS = BIT(1),99#else100 STEP_DECOMPRESS = 0, /* compile out the decompression-related code */101#endif102#ifdef CONFIG_FS_VERITY103 STEP_VERITY = BIT(2),104#else105 STEP_VERITY = 0, /* compile out the verity-related code */106#endif107};108 109struct bio_post_read_ctx {110 struct bio *bio;111 struct f2fs_sb_info *sbi;112 struct work_struct work;113 unsigned int enabled_steps;114 /*115 * decompression_attempted keeps track of whether116 * f2fs_end_read_compressed_page() has been called on the pages in the117 * bio that belong to a compressed cluster yet.118 */119 bool decompression_attempted;120 block_t fs_blkaddr;121};122 123/*124 * Update and unlock a bio's pages, and free the bio.125 *126 * This marks pages up-to-date only if there was no error in the bio (I/O error,127 * decryption error, or verity error), as indicated by bio->bi_status.128 *129 * "Compressed pages" (pagecache pages backed by a compressed cluster on-disk)130 * aren't marked up-to-date here, as decompression is done on a per-compression-131 * cluster basis rather than a per-bio basis. Instead, we only must do two132 * things for each compressed page here: call f2fs_end_read_compressed_page()133 * with failed=true if an error occurred before it would have normally gotten134 * called (i.e., I/O error or decryption error, but *not* verity error), and135 * release the bio's reference to the decompress_io_ctx of the page's cluster.136 */137static void f2fs_finish_read_bio(struct bio *bio, bool in_task)138{139 struct bio_vec *bv;140 struct bvec_iter_all iter_all;141 struct bio_post_read_ctx *ctx = bio->bi_private;142 143 bio_for_each_segment_all(bv, bio, iter_all) {144 struct page *page = bv->bv_page;145 146 if (f2fs_is_compressed_page(page)) {147 if (ctx && !ctx->decompression_attempted)148 f2fs_end_read_compressed_page(page, true, 0,149 in_task);150 f2fs_put_page_dic(page, in_task);151 continue;152 }153 154 if (bio->bi_status)155 ClearPageUptodate(page);156 else157 SetPageUptodate(page);158 dec_page_count(F2FS_P_SB(page), __read_io_type(page));159 unlock_page(page);160 }161 162 if (ctx)163 mempool_free(ctx, bio_post_read_ctx_pool);164 bio_put(bio);165}166 167static void f2fs_verify_bio(struct work_struct *work)168{169 struct bio_post_read_ctx *ctx =170 container_of(work, struct bio_post_read_ctx, work);171 struct bio *bio = ctx->bio;172 bool may_have_compressed_pages = (ctx->enabled_steps & STEP_DECOMPRESS);173 174 /*175 * fsverity_verify_bio() may call readahead() again, and while verity176 * will be disabled for this, decryption and/or decompression may still177 * be needed, resulting in another bio_post_read_ctx being allocated.178 * So to prevent deadlocks we need to release the current ctx to the179 * mempool first. This assumes that verity is the last post-read step.180 */181 mempool_free(ctx, bio_post_read_ctx_pool);182 bio->bi_private = NULL;183 184 /*185 * Verify the bio's pages with fs-verity. Exclude compressed pages,186 * as those were handled separately by f2fs_end_read_compressed_page().187 */188 if (may_have_compressed_pages) {189 struct bio_vec *bv;190 struct bvec_iter_all iter_all;191 192 bio_for_each_segment_all(bv, bio, iter_all) {193 struct page *page = bv->bv_page;194 195 if (!f2fs_is_compressed_page(page) &&196 !fsverity_verify_page(page)) {197 bio->bi_status = BLK_STS_IOERR;198 break;199 }200 }201 } else {202 fsverity_verify_bio(bio);203 }204 205 f2fs_finish_read_bio(bio, true);206}207 208/*209 * If the bio's data needs to be verified with fs-verity, then enqueue the210 * verity work for the bio. Otherwise finish the bio now.211 *212 * Note that to avoid deadlocks, the verity work can't be done on the213 * decryption/decompression workqueue. This is because verifying the data pages214 * can involve reading verity metadata pages from the file, and these verity215 * metadata pages may be encrypted and/or compressed.216 */217static void f2fs_verify_and_finish_bio(struct bio *bio, bool in_task)218{219 struct bio_post_read_ctx *ctx = bio->bi_private;220 221 if (ctx && (ctx->enabled_steps & STEP_VERITY)) {222 INIT_WORK(&ctx->work, f2fs_verify_bio);223 fsverity_enqueue_verify_work(&ctx->work);224 } else {225 f2fs_finish_read_bio(bio, in_task);226 }227}228 229/*230 * Handle STEP_DECOMPRESS by decompressing any compressed clusters whose last231 * remaining page was read by @ctx->bio.232 *233 * Note that a bio may span clusters (even a mix of compressed and uncompressed234 * clusters) or be for just part of a cluster. STEP_DECOMPRESS just indicates235 * that the bio includes at least one compressed page. The actual decompression236 * is done on a per-cluster basis, not a per-bio basis.237 */238static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx,239 bool in_task)240{241 struct bio_vec *bv;242 struct bvec_iter_all iter_all;243 bool all_compressed = true;244 block_t blkaddr = ctx->fs_blkaddr;245 246 bio_for_each_segment_all(bv, ctx->bio, iter_all) {247 struct page *page = bv->bv_page;248 249 if (f2fs_is_compressed_page(page))250 f2fs_end_read_compressed_page(page, false, blkaddr,251 in_task);252 else253 all_compressed = false;254 255 blkaddr++;256 }257 258 ctx->decompression_attempted = true;259 260 /*261 * Optimization: if all the bio's pages are compressed, then scheduling262 * the per-bio verity work is unnecessary, as verity will be fully263 * handled at the compression cluster level.264 */265 if (all_compressed)266 ctx->enabled_steps &= ~STEP_VERITY;267}268 269static void f2fs_post_read_work(struct work_struct *work)270{271 struct bio_post_read_ctx *ctx =272 container_of(work, struct bio_post_read_ctx, work);273 struct bio *bio = ctx->bio;274 275 if ((ctx->enabled_steps & STEP_DECRYPT) && !fscrypt_decrypt_bio(bio)) {276 f2fs_finish_read_bio(bio, true);277 return;278 }279 280 if (ctx->enabled_steps & STEP_DECOMPRESS)281 f2fs_handle_step_decompress(ctx, true);282 283 f2fs_verify_and_finish_bio(bio, true);284}285 286static void f2fs_read_end_io(struct bio *bio)287{288 struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));289 struct bio_post_read_ctx *ctx;290 bool intask = in_task();291 292 iostat_update_and_unbind_ctx(bio);293 ctx = bio->bi_private;294 295 if (time_to_inject(sbi, FAULT_READ_IO))296 bio->bi_status = BLK_STS_IOERR;297 298 if (bio->bi_status) {299 f2fs_finish_read_bio(bio, intask);300 return;301 }302 303 if (ctx) {304 unsigned int enabled_steps = ctx->enabled_steps &305 (STEP_DECRYPT | STEP_DECOMPRESS);306 307 /*308 * If we have only decompression step between decompression and309 * decrypt, we don't need post processing for this.310 */311 if (enabled_steps == STEP_DECOMPRESS &&312 !f2fs_low_mem_mode(sbi)) {313 f2fs_handle_step_decompress(ctx, intask);314 } else if (enabled_steps) {315 INIT_WORK(&ctx->work, f2fs_post_read_work);316 queue_work(ctx->sbi->post_read_wq, &ctx->work);317 return;318 }319 }320 321 f2fs_verify_and_finish_bio(bio, intask);322}323 324static void f2fs_write_end_io(struct bio *bio)325{326 struct f2fs_sb_info *sbi;327 struct bio_vec *bvec;328 struct bvec_iter_all iter_all;329 330 iostat_update_and_unbind_ctx(bio);331 sbi = bio->bi_private;332 333 if (time_to_inject(sbi, FAULT_WRITE_IO))334 bio->bi_status = BLK_STS_IOERR;335 336 bio_for_each_segment_all(bvec, bio, iter_all) {337 struct page *page = bvec->bv_page;338 enum count_type type = WB_DATA_TYPE(page, false);339 340 fscrypt_finalize_bounce_page(&page);341 342#ifdef CONFIG_F2FS_FS_COMPRESSION343 if (f2fs_is_compressed_page(page)) {344 f2fs_compress_write_end_io(bio, page);345 continue;346 }347#endif348 349 if (unlikely(bio->bi_status)) {350 mapping_set_error(page->mapping, -EIO);351 if (type == F2FS_WB_CP_DATA)352 f2fs_stop_checkpoint(sbi, true,353 STOP_CP_REASON_WRITE_FAIL);354 }355 356 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&357 page_folio(page)->index != nid_of_node(page));358 359 dec_page_count(sbi, type);360 if (f2fs_in_warm_node_list(sbi, page))361 f2fs_del_fsync_node_entry(sbi, page);362 clear_page_private_gcing(page);363 end_page_writeback(page);364 }365 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&366 wq_has_sleeper(&sbi->cp_wait))367 wake_up(&sbi->cp_wait);368 369 bio_put(bio);370}371 372#ifdef CONFIG_BLK_DEV_ZONED373static void f2fs_zone_write_end_io(struct bio *bio)374{375 struct f2fs_bio_info *io = (struct f2fs_bio_info *)bio->bi_private;376 377 bio->bi_private = io->bi_private;378 complete(&io->zone_wait);379 f2fs_write_end_io(bio);380}381#endif382 383struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,384 block_t blk_addr, sector_t *sector)385{386 struct block_device *bdev = sbi->sb->s_bdev;387 int i;388 389 if (f2fs_is_multi_device(sbi)) {390 for (i = 0; i < sbi->s_ndevs; i++) {391 if (FDEV(i).start_blk <= blk_addr &&392 FDEV(i).end_blk >= blk_addr) {393 blk_addr -= FDEV(i).start_blk;394 bdev = FDEV(i).bdev;395 break;396 }397 }398 }399 400 if (sector)401 *sector = SECTOR_FROM_BLOCK(blk_addr);402 return bdev;403}404 405int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)406{407 int i;408 409 if (!f2fs_is_multi_device(sbi))410 return 0;411 412 for (i = 0; i < sbi->s_ndevs; i++)413 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)414 return i;415 return 0;416}417 418static blk_opf_t f2fs_io_flags(struct f2fs_io_info *fio)419{420 unsigned int temp_mask = GENMASK(NR_TEMP_TYPE - 1, 0);421 unsigned int fua_flag, meta_flag, io_flag;422 blk_opf_t op_flags = 0;423 424 if (fio->op != REQ_OP_WRITE)425 return 0;426 if (fio->type == DATA)427 io_flag = fio->sbi->data_io_flag;428 else if (fio->type == NODE)429 io_flag = fio->sbi->node_io_flag;430 else431 return 0;432 433 fua_flag = io_flag & temp_mask;434 meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask;435 436 /*437 * data/node io flag bits per temp:438 * REQ_META | REQ_FUA |439 * 5 | 4 | 3 | 2 | 1 | 0 |440 * Cold | Warm | Hot | Cold | Warm | Hot |441 */442 if (BIT(fio->temp) & meta_flag)443 op_flags |= REQ_META;444 if (BIT(fio->temp) & fua_flag)445 op_flags |= REQ_FUA;446 return op_flags;447}448 449static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)450{451 struct f2fs_sb_info *sbi = fio->sbi;452 struct block_device *bdev;453 sector_t sector;454 struct bio *bio;455 456 bdev = f2fs_target_device(sbi, fio->new_blkaddr, §or);457 bio = bio_alloc_bioset(bdev, npages,458 fio->op | fio->op_flags | f2fs_io_flags(fio),459 GFP_NOIO, &f2fs_bioset);460 bio->bi_iter.bi_sector = sector;461 if (is_read_io(fio->op)) {462 bio->bi_end_io = f2fs_read_end_io;463 bio->bi_private = NULL;464 } else {465 bio->bi_end_io = f2fs_write_end_io;466 bio->bi_private = sbi;467 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,468 fio->type, fio->temp);469 }470 iostat_alloc_and_bind_ctx(sbi, bio, NULL);471 472 if (fio->io_wbc)473 wbc_init_bio(fio->io_wbc, bio);474 475 return bio;476}477 478static void f2fs_set_bio_crypt_ctx(struct bio *bio, const struct inode *inode,479 pgoff_t first_idx,480 const struct f2fs_io_info *fio,481 gfp_t gfp_mask)482{483 /*484 * The f2fs garbage collector sets ->encrypted_page when it wants to485 * read/write raw data without encryption.486 */487 if (!fio || !fio->encrypted_page)488 fscrypt_set_bio_crypt_ctx(bio, inode, first_idx, gfp_mask);489}490 491static bool f2fs_crypt_mergeable_bio(struct bio *bio, const struct inode *inode,492 pgoff_t next_idx,493 const struct f2fs_io_info *fio)494{495 /*496 * The f2fs garbage collector sets ->encrypted_page when it wants to497 * read/write raw data without encryption.498 */499 if (fio && fio->encrypted_page)500 return !bio_has_crypt_ctx(bio);501 502 return fscrypt_mergeable_bio(bio, inode, next_idx);503}504 505void f2fs_submit_read_bio(struct f2fs_sb_info *sbi, struct bio *bio,506 enum page_type type)507{508 WARN_ON_ONCE(!is_read_io(bio_op(bio)));509 trace_f2fs_submit_read_bio(sbi->sb, type, bio);510 511 iostat_update_submit_ctx(bio, type);512 submit_bio(bio);513}514 515static void f2fs_submit_write_bio(struct f2fs_sb_info *sbi, struct bio *bio,516 enum page_type type)517{518 WARN_ON_ONCE(is_read_io(bio_op(bio)));519 520 if (f2fs_lfs_mode(sbi) && current->plug && PAGE_TYPE_ON_MAIN(type))521 blk_finish_plug(current->plug);522 523 trace_f2fs_submit_write_bio(sbi->sb, type, bio);524 iostat_update_submit_ctx(bio, type);525 submit_bio(bio);526}527 528static void __submit_merged_bio(struct f2fs_bio_info *io)529{530 struct f2fs_io_info *fio = &io->fio;531 532 if (!io->bio)533 return;534 535 if (is_read_io(fio->op)) {536 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);537 f2fs_submit_read_bio(io->sbi, io->bio, fio->type);538 } else {539 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);540 f2fs_submit_write_bio(io->sbi, io->bio, fio->type);541 }542 io->bio = NULL;543}544 545static bool __has_merged_page(struct bio *bio, struct inode *inode,546 struct page *page, nid_t ino)547{548 struct bio_vec *bvec;549 struct bvec_iter_all iter_all;550 551 if (!bio)552 return false;553 554 if (!inode && !page && !ino)555 return true;556 557 bio_for_each_segment_all(bvec, bio, iter_all) {558 struct page *target = bvec->bv_page;559 560 if (fscrypt_is_bounce_page(target)) {561 target = fscrypt_pagecache_page(target);562 if (IS_ERR(target))563 continue;564 }565 if (f2fs_is_compressed_page(target)) {566 target = f2fs_compress_control_page(target);567 if (IS_ERR(target))568 continue;569 }570 571 if (inode && inode == target->mapping->host)572 return true;573 if (page && page == target)574 return true;575 if (ino && ino == ino_of_node(target))576 return true;577 }578 579 return false;580}581 582int f2fs_init_write_merge_io(struct f2fs_sb_info *sbi)583{584 int i;585 586 for (i = 0; i < NR_PAGE_TYPE; i++) {587 int n = (i == META) ? 1 : NR_TEMP_TYPE;588 int j;589 590 sbi->write_io[i] = f2fs_kmalloc(sbi,591 array_size(n, sizeof(struct f2fs_bio_info)),592 GFP_KERNEL);593 if (!sbi->write_io[i])594 return -ENOMEM;595 596 for (j = HOT; j < n; j++) {597 struct f2fs_bio_info *io = &sbi->write_io[i][j];598 599 init_f2fs_rwsem(&io->io_rwsem);600 io->sbi = sbi;601 io->bio = NULL;602 io->last_block_in_bio = 0;603 spin_lock_init(&io->io_lock);604 INIT_LIST_HEAD(&io->io_list);605 INIT_LIST_HEAD(&io->bio_list);606 init_f2fs_rwsem(&io->bio_list_lock);607#ifdef CONFIG_BLK_DEV_ZONED608 init_completion(&io->zone_wait);609 io->zone_pending_bio = NULL;610 io->bi_private = NULL;611#endif612 }613 }614 615 return 0;616}617 618static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,619 enum page_type type, enum temp_type temp)620{621 enum page_type btype = PAGE_TYPE_OF_BIO(type);622 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;623 624 f2fs_down_write(&io->io_rwsem);625 626 if (!io->bio)627 goto unlock_out;628 629 /* change META to META_FLUSH in the checkpoint procedure */630 if (type >= META_FLUSH) {631 io->fio.type = META_FLUSH;632 io->bio->bi_opf |= REQ_META | REQ_PRIO | REQ_SYNC;633 if (!test_opt(sbi, NOBARRIER))634 io->bio->bi_opf |= REQ_PREFLUSH | REQ_FUA;635 }636 __submit_merged_bio(io);637unlock_out:638 f2fs_up_write(&io->io_rwsem);639}640 641static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,642 struct inode *inode, struct page *page,643 nid_t ino, enum page_type type, bool force)644{645 enum temp_type temp;646 bool ret = true;647 648 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {649 if (!force) {650 enum page_type btype = PAGE_TYPE_OF_BIO(type);651 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;652 653 f2fs_down_read(&io->io_rwsem);654 ret = __has_merged_page(io->bio, inode, page, ino);655 f2fs_up_read(&io->io_rwsem);656 }657 if (ret)658 __f2fs_submit_merged_write(sbi, type, temp);659 660 /* TODO: use HOT temp only for meta pages now. */661 if (type >= META)662 break;663 }664}665 666void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)667{668 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);669}670 671void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,672 struct inode *inode, struct page *page,673 nid_t ino, enum page_type type)674{675 __submit_merged_write_cond(sbi, inode, page, ino, type, false);676}677 678void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)679{680 f2fs_submit_merged_write(sbi, DATA);681 f2fs_submit_merged_write(sbi, NODE);682 f2fs_submit_merged_write(sbi, META);683}684 685/*686 * Fill the locked page with data located in the block address.687 * A caller needs to unlock the page on failure.688 */689int f2fs_submit_page_bio(struct f2fs_io_info *fio)690{691 struct bio *bio;692 struct page *page = fio->encrypted_page ?693 fio->encrypted_page : fio->page;694 695 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,696 fio->is_por ? META_POR : (__is_meta_io(fio) ?697 META_GENERIC : DATA_GENERIC_ENHANCE)))698 return -EFSCORRUPTED;699 700 trace_f2fs_submit_page_bio(page, fio);701 702 /* Allocate a new bio */703 bio = __bio_alloc(fio, 1);704 705 f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,706 page_folio(fio->page)->index, fio, GFP_NOIO);707 708 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {709 bio_put(bio);710 return -EFAULT;711 }712 713 if (fio->io_wbc && !is_read_io(fio->op))714 wbc_account_cgroup_owner(fio->io_wbc, fio->page, PAGE_SIZE);715 716 inc_page_count(fio->sbi, is_read_io(fio->op) ?717 __read_io_type(page) : WB_DATA_TYPE(fio->page, false));718 719 if (is_read_io(bio_op(bio)))720 f2fs_submit_read_bio(fio->sbi, bio, fio->type);721 else722 f2fs_submit_write_bio(fio->sbi, bio, fio->type);723 return 0;724}725 726static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,727 block_t last_blkaddr, block_t cur_blkaddr)728{729 if (unlikely(sbi->max_io_bytes &&730 bio->bi_iter.bi_size >= sbi->max_io_bytes))731 return false;732 if (last_blkaddr + 1 != cur_blkaddr)733 return false;734 return bio->bi_bdev == f2fs_target_device(sbi, cur_blkaddr, NULL);735}736 737static bool io_type_is_mergeable(struct f2fs_bio_info *io,738 struct f2fs_io_info *fio)739{740 if (io->fio.op != fio->op)741 return false;742 return io->fio.op_flags == fio->op_flags;743}744 745static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,746 struct f2fs_bio_info *io,747 struct f2fs_io_info *fio,748 block_t last_blkaddr,749 block_t cur_blkaddr)750{751 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))752 return false;753 return io_type_is_mergeable(io, fio);754}755 756static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,757 struct page *page, enum temp_type temp)758{759 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;760 struct bio_entry *be;761 762 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS, true, NULL);763 be->bio = bio;764 bio_get(bio);765 766 if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)767 f2fs_bug_on(sbi, 1);768 769 f2fs_down_write(&io->bio_list_lock);770 list_add_tail(&be->list, &io->bio_list);771 f2fs_up_write(&io->bio_list_lock);772}773 774static void del_bio_entry(struct bio_entry *be)775{776 list_del(&be->list);777 kmem_cache_free(bio_entry_slab, be);778}779 780static int add_ipu_page(struct f2fs_io_info *fio, struct bio **bio,781 struct page *page)782{783 struct f2fs_sb_info *sbi = fio->sbi;784 enum temp_type temp;785 bool found = false;786 int ret = -EAGAIN;787 788 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {789 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;790 struct list_head *head = &io->bio_list;791 struct bio_entry *be;792 793 f2fs_down_write(&io->bio_list_lock);794 list_for_each_entry(be, head, list) {795 if (be->bio != *bio)796 continue;797 798 found = true;799 800 f2fs_bug_on(sbi, !page_is_mergeable(sbi, *bio,801 *fio->last_block,802 fio->new_blkaddr));803 if (f2fs_crypt_mergeable_bio(*bio,804 fio->page->mapping->host,805 page_folio(fio->page)->index, fio) &&806 bio_add_page(*bio, page, PAGE_SIZE, 0) ==807 PAGE_SIZE) {808 ret = 0;809 break;810 }811 812 /* page can't be merged into bio; submit the bio */813 del_bio_entry(be);814 f2fs_submit_write_bio(sbi, *bio, DATA);815 break;816 }817 f2fs_up_write(&io->bio_list_lock);818 }819 820 if (ret) {821 bio_put(*bio);822 *bio = NULL;823 }824 825 return ret;826}827 828void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,829 struct bio **bio, struct page *page)830{831 enum temp_type temp;832 bool found = false;833 struct bio *target = bio ? *bio : NULL;834 835 f2fs_bug_on(sbi, !target && !page);836 837 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {838 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;839 struct list_head *head = &io->bio_list;840 struct bio_entry *be;841 842 if (list_empty(head))843 continue;844 845 f2fs_down_read(&io->bio_list_lock);846 list_for_each_entry(be, head, list) {847 if (target)848 found = (target == be->bio);849 else850 found = __has_merged_page(be->bio, NULL,851 page, 0);852 if (found)853 break;854 }855 f2fs_up_read(&io->bio_list_lock);856 857 if (!found)858 continue;859 860 found = false;861 862 f2fs_down_write(&io->bio_list_lock);863 list_for_each_entry(be, head, list) {864 if (target)865 found = (target == be->bio);866 else867 found = __has_merged_page(be->bio, NULL,868 page, 0);869 if (found) {870 target = be->bio;871 del_bio_entry(be);872 break;873 }874 }875 f2fs_up_write(&io->bio_list_lock);876 }877 878 if (found)879 f2fs_submit_write_bio(sbi, target, DATA);880 if (bio && *bio) {881 bio_put(*bio);882 *bio = NULL;883 }884}885 886int f2fs_merge_page_bio(struct f2fs_io_info *fio)887{888 struct bio *bio = *fio->bio;889 struct page *page = fio->encrypted_page ?890 fio->encrypted_page : fio->page;891 892 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,893 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))894 return -EFSCORRUPTED;895 896 trace_f2fs_submit_page_bio(page, fio);897 898 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,899 fio->new_blkaddr))900 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);901alloc_new:902 if (!bio) {903 bio = __bio_alloc(fio, BIO_MAX_VECS);904 f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,905 page_folio(fio->page)->index, fio, GFP_NOIO);906 907 add_bio_entry(fio->sbi, bio, page, fio->temp);908 } else {909 if (add_ipu_page(fio, &bio, page))910 goto alloc_new;911 }912 913 if (fio->io_wbc)914 wbc_account_cgroup_owner(fio->io_wbc, fio->page, PAGE_SIZE);915 916 inc_page_count(fio->sbi, WB_DATA_TYPE(page, false));917 918 *fio->last_block = fio->new_blkaddr;919 *fio->bio = bio;920 921 return 0;922}923 924#ifdef CONFIG_BLK_DEV_ZONED925static bool is_end_zone_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr)926{927 struct block_device *bdev = sbi->sb->s_bdev;928 int devi = 0;929 930 if (f2fs_is_multi_device(sbi)) {931 devi = f2fs_target_device_index(sbi, blkaddr);932 if (blkaddr < FDEV(devi).start_blk ||933 blkaddr > FDEV(devi).end_blk) {934 f2fs_err(sbi, "Invalid block %x", blkaddr);935 return false;936 }937 blkaddr -= FDEV(devi).start_blk;938 bdev = FDEV(devi).bdev;939 }940 return bdev_is_zoned(bdev) &&941 f2fs_blkz_is_seq(sbi, devi, blkaddr) &&942 (blkaddr % sbi->blocks_per_blkz == sbi->blocks_per_blkz - 1);943}944#endif945 946void f2fs_submit_page_write(struct f2fs_io_info *fio)947{948 struct f2fs_sb_info *sbi = fio->sbi;949 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);950 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;951 struct page *bio_page;952 enum count_type type;953 954 f2fs_bug_on(sbi, is_read_io(fio->op));955 956 f2fs_down_write(&io->io_rwsem);957next:958#ifdef CONFIG_BLK_DEV_ZONED959 if (f2fs_sb_has_blkzoned(sbi) && btype < META && io->zone_pending_bio) {960 wait_for_completion_io(&io->zone_wait);961 bio_put(io->zone_pending_bio);962 io->zone_pending_bio = NULL;963 io->bi_private = NULL;964 }965#endif966 967 if (fio->in_list) {968 spin_lock(&io->io_lock);969 if (list_empty(&io->io_list)) {970 spin_unlock(&io->io_lock);971 goto out;972 }973 fio = list_first_entry(&io->io_list,974 struct f2fs_io_info, list);975 list_del(&fio->list);976 spin_unlock(&io->io_lock);977 }978 979 verify_fio_blkaddr(fio);980 981 if (fio->encrypted_page)982 bio_page = fio->encrypted_page;983 else if (fio->compressed_page)984 bio_page = fio->compressed_page;985 else986 bio_page = fio->page;987 988 /* set submitted = true as a return value */989 fio->submitted = 1;990 991 type = WB_DATA_TYPE(bio_page, fio->compressed_page);992 inc_page_count(sbi, type);993 994 if (io->bio &&995 (!io_is_mergeable(sbi, io->bio, io, fio, io->last_block_in_bio,996 fio->new_blkaddr) ||997 !f2fs_crypt_mergeable_bio(io->bio, fio->page->mapping->host,998 page_folio(bio_page)->index, fio)))999 __submit_merged_bio(io);1000alloc_new:1001 if (io->bio == NULL) {1002 io->bio = __bio_alloc(fio, BIO_MAX_VECS);1003 f2fs_set_bio_crypt_ctx(io->bio, fio->page->mapping->host,1004 page_folio(bio_page)->index, fio, GFP_NOIO);1005 io->fio = *fio;1006 }1007 1008 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {1009 __submit_merged_bio(io);1010 goto alloc_new;1011 }1012 1013 if (fio->io_wbc)1014 wbc_account_cgroup_owner(fio->io_wbc, fio->page, PAGE_SIZE);1015 1016 io->last_block_in_bio = fio->new_blkaddr;1017 1018 trace_f2fs_submit_page_write(fio->page, fio);1019#ifdef CONFIG_BLK_DEV_ZONED1020 if (f2fs_sb_has_blkzoned(sbi) && btype < META &&1021 is_end_zone_blkaddr(sbi, fio->new_blkaddr)) {1022 bio_get(io->bio);1023 reinit_completion(&io->zone_wait);1024 io->bi_private = io->bio->bi_private;1025 io->bio->bi_private = io;1026 io->bio->bi_end_io = f2fs_zone_write_end_io;1027 io->zone_pending_bio = io->bio;1028 __submit_merged_bio(io);1029 }1030#endif1031 if (fio->in_list)1032 goto next;1033out:1034 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||1035 !f2fs_is_checkpoint_ready(sbi))1036 __submit_merged_bio(io);1037 f2fs_up_write(&io->io_rwsem);1038}1039 1040static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,1041 unsigned nr_pages, blk_opf_t op_flag,1042 pgoff_t first_idx, bool for_write)1043{1044 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1045 struct bio *bio;1046 struct bio_post_read_ctx *ctx = NULL;1047 unsigned int post_read_steps = 0;1048 sector_t sector;1049 struct block_device *bdev = f2fs_target_device(sbi, blkaddr, §or);1050 1051 bio = bio_alloc_bioset(bdev, bio_max_segs(nr_pages),1052 REQ_OP_READ | op_flag,1053 for_write ? GFP_NOIO : GFP_KERNEL, &f2fs_bioset);1054 if (!bio)1055 return ERR_PTR(-ENOMEM);1056 bio->bi_iter.bi_sector = sector;1057 f2fs_set_bio_crypt_ctx(bio, inode, first_idx, NULL, GFP_NOFS);1058 bio->bi_end_io = f2fs_read_end_io;1059 1060 if (fscrypt_inode_uses_fs_layer_crypto(inode))1061 post_read_steps |= STEP_DECRYPT;1062 1063 if (f2fs_need_verity(inode, first_idx))1064 post_read_steps |= STEP_VERITY;1065 1066 /*1067 * STEP_DECOMPRESS is handled specially, since a compressed file might1068 * contain both compressed and uncompressed clusters. We'll allocate a1069 * bio_post_read_ctx if the file is compressed, but the caller is1070 * responsible for enabling STEP_DECOMPRESS if it's actually needed.1071 */1072 1073 if (post_read_steps || f2fs_compressed_file(inode)) {1074 /* Due to the mempool, this never fails. */1075 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);1076 ctx->bio = bio;1077 ctx->sbi = sbi;1078 ctx->enabled_steps = post_read_steps;1079 ctx->fs_blkaddr = blkaddr;1080 ctx->decompression_attempted = false;1081 bio->bi_private = ctx;1082 }1083 iostat_alloc_and_bind_ctx(sbi, bio, ctx);1084 1085 return bio;1086}1087 1088/* This can handle encryption stuffs */1089static int f2fs_submit_page_read(struct inode *inode, struct folio *folio,1090 block_t blkaddr, blk_opf_t op_flags,1091 bool for_write)1092{1093 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1094 struct bio *bio;1095 1096 bio = f2fs_grab_read_bio(inode, blkaddr, 1, op_flags,1097 folio->index, for_write);1098 if (IS_ERR(bio))1099 return PTR_ERR(bio);1100 1101 /* wait for GCed page writeback via META_MAPPING */1102 f2fs_wait_on_block_writeback(inode, blkaddr);1103 1104 if (!bio_add_folio(bio, folio, PAGE_SIZE, 0)) {1105 iostat_update_and_unbind_ctx(bio);1106 if (bio->bi_private)1107 mempool_free(bio->bi_private, bio_post_read_ctx_pool);1108 bio_put(bio);1109 return -EFAULT;1110 }1111 inc_page_count(sbi, F2FS_RD_DATA);1112 f2fs_update_iostat(sbi, NULL, FS_DATA_READ_IO, F2FS_BLKSIZE);1113 f2fs_submit_read_bio(sbi, bio, DATA);1114 return 0;1115}1116 1117static void __set_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)1118{1119 __le32 *addr = get_dnode_addr(dn->inode, dn->node_page);1120 1121 dn->data_blkaddr = blkaddr;1122 addr[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);1123}1124 1125/*1126 * Lock ordering for the change of data block address:1127 * ->data_page1128 * ->node_page1129 * update block addresses in the node page1130 */1131void f2fs_set_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)1132{1133 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);1134 __set_data_blkaddr(dn, blkaddr);1135 if (set_page_dirty(dn->node_page))1136 dn->node_changed = true;1137}1138 1139void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)1140{1141 f2fs_set_data_blkaddr(dn, blkaddr);1142 f2fs_update_read_extent_cache(dn);1143}1144 1145/* dn->ofs_in_node will be returned with up-to-date last block pointer */1146int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)1147{1148 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);1149 int err;1150 1151 if (!count)1152 return 0;1153 1154 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))1155 return -EPERM;1156 err = inc_valid_block_count(sbi, dn->inode, &count, true);1157 if (unlikely(err))1158 return err;1159 1160 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,1161 dn->ofs_in_node, count);1162 1163 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);1164 1165 for (; count > 0; dn->ofs_in_node++) {1166 block_t blkaddr = f2fs_data_blkaddr(dn);1167 1168 if (blkaddr == NULL_ADDR) {1169 __set_data_blkaddr(dn, NEW_ADDR);1170 count--;1171 }1172 }1173 1174 if (set_page_dirty(dn->node_page))1175 dn->node_changed = true;1176 return 0;1177}1178 1179/* Should keep dn->ofs_in_node unchanged */1180int f2fs_reserve_new_block(struct dnode_of_data *dn)1181{1182 unsigned int ofs_in_node = dn->ofs_in_node;1183 int ret;1184 1185 ret = f2fs_reserve_new_blocks(dn, 1);1186 dn->ofs_in_node = ofs_in_node;1187 return ret;1188}1189 1190int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)1191{1192 bool need_put = dn->inode_page ? false : true;1193 int err;1194 1195 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);1196 if (err)1197 return err;1198 1199 if (dn->data_blkaddr == NULL_ADDR)1200 err = f2fs_reserve_new_block(dn);1201 if (err || need_put)1202 f2fs_put_dnode(dn);1203 return err;1204}1205 1206struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,1207 blk_opf_t op_flags, bool for_write,1208 pgoff_t *next_pgofs)1209{1210 struct address_space *mapping = inode->i_mapping;1211 struct dnode_of_data dn;1212 struct page *page;1213 int err;1214 1215 page = f2fs_grab_cache_page(mapping, index, for_write);1216 if (!page)1217 return ERR_PTR(-ENOMEM);1218 1219 if (f2fs_lookup_read_extent_cache_block(inode, index,1220 &dn.data_blkaddr)) {1221 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,1222 DATA_GENERIC_ENHANCE_READ)) {1223 err = -EFSCORRUPTED;1224 goto put_err;1225 }1226 goto got_it;1227 }1228 1229 set_new_dnode(&dn, inode, NULL, NULL, 0);1230 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);1231 if (err) {1232 if (err == -ENOENT && next_pgofs)1233 *next_pgofs = f2fs_get_next_page_offset(&dn, index);1234 goto put_err;1235 }1236 f2fs_put_dnode(&dn);1237 1238 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {1239 err = -ENOENT;1240 if (next_pgofs)1241 *next_pgofs = index + 1;1242 goto put_err;1243 }1244 if (dn.data_blkaddr != NEW_ADDR &&1245 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),1246 dn.data_blkaddr,1247 DATA_GENERIC_ENHANCE)) {1248 err = -EFSCORRUPTED;1249 goto put_err;1250 }1251got_it:1252 if (PageUptodate(page)) {1253 unlock_page(page);1254 return page;1255 }1256 1257 /*1258 * A new dentry page is allocated but not able to be written, since its1259 * new inode page couldn't be allocated due to -ENOSPC.1260 * In such the case, its blkaddr can be remained as NEW_ADDR.1261 * see, f2fs_add_link -> f2fs_get_new_data_page ->1262 * f2fs_init_inode_metadata.1263 */1264 if (dn.data_blkaddr == NEW_ADDR) {1265 zero_user_segment(page, 0, PAGE_SIZE);1266 if (!PageUptodate(page))1267 SetPageUptodate(page);1268 unlock_page(page);1269 return page;1270 }1271 1272 err = f2fs_submit_page_read(inode, page_folio(page), dn.data_blkaddr,1273 op_flags, for_write);1274 if (err)1275 goto put_err;1276 return page;1277 1278put_err:1279 f2fs_put_page(page, 1);1280 return ERR_PTR(err);1281}1282 1283struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index,1284 pgoff_t *next_pgofs)1285{1286 struct address_space *mapping = inode->i_mapping;1287 struct page *page;1288 1289 page = find_get_page(mapping, index);1290 if (page && PageUptodate(page))1291 return page;1292 f2fs_put_page(page, 0);1293 1294 page = f2fs_get_read_data_page(inode, index, 0, false, next_pgofs);1295 if (IS_ERR(page))1296 return page;1297 1298 if (PageUptodate(page))1299 return page;1300 1301 wait_on_page_locked(page);1302 if (unlikely(!PageUptodate(page))) {1303 f2fs_put_page(page, 0);1304 return ERR_PTR(-EIO);1305 }1306 return page;1307}1308 1309/*1310 * If it tries to access a hole, return an error.1311 * Because, the callers, functions in dir.c and GC, should be able to know1312 * whether this page exists or not.1313 */1314struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,1315 bool for_write)1316{1317 struct address_space *mapping = inode->i_mapping;1318 struct page *page;1319 1320 page = f2fs_get_read_data_page(inode, index, 0, for_write, NULL);1321 if (IS_ERR(page))1322 return page;1323 1324 /* wait for read completion */1325 lock_page(page);1326 if (unlikely(page->mapping != mapping || !PageUptodate(page))) {1327 f2fs_put_page(page, 1);1328 return ERR_PTR(-EIO);1329 }1330 return page;1331}1332 1333/*1334 * Caller ensures that this data page is never allocated.1335 * A new zero-filled data page is allocated in the page cache.1336 *1337 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and1338 * f2fs_unlock_op().1339 * Note that, ipage is set only by make_empty_dir, and if any error occur,1340 * ipage should be released by this function.1341 */1342struct page *f2fs_get_new_data_page(struct inode *inode,1343 struct page *ipage, pgoff_t index, bool new_i_size)1344{1345 struct address_space *mapping = inode->i_mapping;1346 struct page *page;1347 struct dnode_of_data dn;1348 int err;1349 1350 page = f2fs_grab_cache_page(mapping, index, true);1351 if (!page) {1352 /*1353 * before exiting, we should make sure ipage will be released1354 * if any error occur.1355 */1356 f2fs_put_page(ipage, 1);1357 return ERR_PTR(-ENOMEM);1358 }1359 1360 set_new_dnode(&dn, inode, ipage, NULL, 0);1361 err = f2fs_reserve_block(&dn, index);1362 if (err) {1363 f2fs_put_page(page, 1);1364 return ERR_PTR(err);1365 }1366 if (!ipage)1367 f2fs_put_dnode(&dn);1368 1369 if (PageUptodate(page))1370 goto got_it;1371 1372 if (dn.data_blkaddr == NEW_ADDR) {1373 zero_user_segment(page, 0, PAGE_SIZE);1374 if (!PageUptodate(page))1375 SetPageUptodate(page);1376 } else {1377 f2fs_put_page(page, 1);1378 1379 /* if ipage exists, blkaddr should be NEW_ADDR */1380 f2fs_bug_on(F2FS_I_SB(inode), ipage);1381 page = f2fs_get_lock_data_page(inode, index, true);1382 if (IS_ERR(page))1383 return page;1384 }1385got_it:1386 if (new_i_size && i_size_read(inode) <1387 ((loff_t)(index + 1) << PAGE_SHIFT))1388 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));1389 return page;1390}1391 1392static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)1393{1394 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);1395 struct f2fs_summary sum;1396 struct node_info ni;1397 block_t old_blkaddr;1398 blkcnt_t count = 1;1399 int err;1400 1401 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))1402 return -EPERM;1403 1404 err = f2fs_get_node_info(sbi, dn->nid, &ni, false);1405 if (err)1406 return err;1407 1408 dn->data_blkaddr = f2fs_data_blkaddr(dn);1409 if (dn->data_blkaddr == NULL_ADDR) {1410 err = inc_valid_block_count(sbi, dn->inode, &count, true);1411 if (unlikely(err))1412 return err;1413 }1414 1415 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);1416 old_blkaddr = dn->data_blkaddr;1417 err = f2fs_allocate_data_block(sbi, NULL, old_blkaddr,1418 &dn->data_blkaddr, &sum, seg_type, NULL);1419 if (err)1420 return err;1421 1422 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)1423 f2fs_invalidate_internal_cache(sbi, old_blkaddr);1424 1425 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);1426 return 0;1427}1428 1429static void f2fs_map_lock(struct f2fs_sb_info *sbi, int flag)1430{1431 if (flag == F2FS_GET_BLOCK_PRE_AIO)1432 f2fs_down_read(&sbi->node_change);1433 else1434 f2fs_lock_op(sbi);1435}1436 1437static void f2fs_map_unlock(struct f2fs_sb_info *sbi, int flag)1438{1439 if (flag == F2FS_GET_BLOCK_PRE_AIO)1440 f2fs_up_read(&sbi->node_change);1441 else1442 f2fs_unlock_op(sbi);1443}1444 1445int f2fs_get_block_locked(struct dnode_of_data *dn, pgoff_t index)1446{1447 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);1448 int err = 0;1449 1450 f2fs_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO);1451 if (!f2fs_lookup_read_extent_cache_block(dn->inode, index,1452 &dn->data_blkaddr))1453 err = f2fs_reserve_block(dn, index);1454 f2fs_map_unlock(sbi, F2FS_GET_BLOCK_PRE_AIO);1455 1456 return err;1457}1458 1459static int f2fs_map_no_dnode(struct inode *inode,1460 struct f2fs_map_blocks *map, struct dnode_of_data *dn,1461 pgoff_t pgoff)1462{1463 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1464 1465 /*1466 * There is one exceptional case that read_node_page() may return1467 * -ENOENT due to filesystem has been shutdown or cp_error, return1468 * -EIO in that case.1469 */1470 if (map->m_may_create &&1471 (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) || f2fs_cp_error(sbi)))1472 return -EIO;1473 1474 if (map->m_next_pgofs)1475 *map->m_next_pgofs = f2fs_get_next_page_offset(dn, pgoff);1476 if (map->m_next_extent)1477 *map->m_next_extent = f2fs_get_next_page_offset(dn, pgoff);1478 return 0;1479}1480 1481static bool f2fs_map_blocks_cached(struct inode *inode,1482 struct f2fs_map_blocks *map, int flag)1483{1484 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1485 unsigned int maxblocks = map->m_len;1486 pgoff_t pgoff = (pgoff_t)map->m_lblk;1487 struct extent_info ei = {};1488 1489 if (!f2fs_lookup_read_extent_cache(inode, pgoff, &ei))1490 return false;1491 1492 map->m_pblk = ei.blk + pgoff - ei.fofs;1493 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgoff);1494 map->m_flags = F2FS_MAP_MAPPED;1495 if (map->m_next_extent)1496 *map->m_next_extent = pgoff + map->m_len;1497 1498 /* for hardware encryption, but to avoid potential issue in future */1499 if (flag == F2FS_GET_BLOCK_DIO)1500 f2fs_wait_on_block_writeback_range(inode,1501 map->m_pblk, map->m_len);1502 1503 if (f2fs_allow_multi_device_dio(sbi, flag)) {1504 int bidx = f2fs_target_device_index(sbi, map->m_pblk);1505 struct f2fs_dev_info *dev = &sbi->devs[bidx];1506 1507 map->m_bdev = dev->bdev;1508 map->m_pblk -= dev->start_blk;1509 map->m_len = min(map->m_len, dev->end_blk + 1 - map->m_pblk);1510 } else {1511 map->m_bdev = inode->i_sb->s_bdev;1512 }1513 return true;1514}1515 1516static bool map_is_mergeable(struct f2fs_sb_info *sbi,1517 struct f2fs_map_blocks *map,1518 block_t blkaddr, int flag, int bidx,1519 int ofs)1520{1521 if (map->m_multidev_dio && map->m_bdev != FDEV(bidx).bdev)1522 return false;1523 if (map->m_pblk != NEW_ADDR && blkaddr == (map->m_pblk + ofs))1524 return true;1525 if (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR)1526 return true;1527 if (flag == F2FS_GET_BLOCK_PRE_DIO)1528 return true;1529 if (flag == F2FS_GET_BLOCK_DIO &&1530 map->m_pblk == NULL_ADDR && blkaddr == NULL_ADDR)1531 return true;1532 return false;1533}1534 1535/*1536 * f2fs_map_blocks() tries to find or build mapping relationship which1537 * maps continuous logical blocks to physical blocks, and return such1538 * info via f2fs_map_blocks structure.1539 */1540int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, int flag)1541{1542 unsigned int maxblocks = map->m_len;1543 struct dnode_of_data dn;1544 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1545 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;1546 pgoff_t pgofs, end_offset, end;1547 int err = 0, ofs = 1;1548 unsigned int ofs_in_node, last_ofs_in_node;1549 blkcnt_t prealloc;1550 block_t blkaddr;1551 unsigned int start_pgofs;1552 int bidx = 0;1553 bool is_hole;1554 1555 if (!maxblocks)1556 return 0;1557 1558 if (!map->m_may_create && f2fs_map_blocks_cached(inode, map, flag))1559 goto out;1560 1561 map->m_bdev = inode->i_sb->s_bdev;1562 map->m_multidev_dio =1563 f2fs_allow_multi_device_dio(F2FS_I_SB(inode), flag);1564 1565 map->m_len = 0;1566 map->m_flags = 0;1567 1568 /* it only supports block size == page size */1569 pgofs = (pgoff_t)map->m_lblk;1570 end = pgofs + maxblocks;1571 1572next_dnode:1573 if (map->m_may_create)1574 f2fs_map_lock(sbi, flag);1575 1576 /* When reading holes, we need its node page */1577 set_new_dnode(&dn, inode, NULL, NULL, 0);1578 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);1579 if (err) {1580 if (flag == F2FS_GET_BLOCK_BMAP)1581 map->m_pblk = 0;1582 if (err == -ENOENT)1583 err = f2fs_map_no_dnode(inode, map, &dn, pgofs);1584 goto unlock_out;1585 }1586 1587 start_pgofs = pgofs;1588 prealloc = 0;1589 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;1590 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);1591 1592next_block:1593 blkaddr = f2fs_data_blkaddr(&dn);1594 is_hole = !__is_valid_data_blkaddr(blkaddr);1595 if (!is_hole &&1596 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {1597 err = -EFSCORRUPTED;1598 goto sync_out;1599 }1600 1601 /* use out-place-update for direct IO under LFS mode */1602 if (map->m_may_create && (is_hole ||1603 (flag == F2FS_GET_BLOCK_DIO && f2fs_lfs_mode(sbi) &&1604 !f2fs_is_pinned_file(inode)))) {1605 if (unlikely(f2fs_cp_error(sbi))) {1606 err = -EIO;1607 goto sync_out;1608 }1609 1610 switch (flag) {1611 case F2FS_GET_BLOCK_PRE_AIO:1612 if (blkaddr == NULL_ADDR) {1613 prealloc++;1614 last_ofs_in_node = dn.ofs_in_node;1615 }1616 break;1617 case F2FS_GET_BLOCK_PRE_DIO:1618 case F2FS_GET_BLOCK_DIO:1619 err = __allocate_data_block(&dn, map->m_seg_type);1620 if (err)1621 goto sync_out;1622 if (flag == F2FS_GET_BLOCK_PRE_DIO)1623 file_need_truncate(inode);1624 set_inode_flag(inode, FI_APPEND_WRITE);1625 break;1626 default:1627 WARN_ON_ONCE(1);1628 err = -EIO;1629 goto sync_out;1630 }1631 1632 blkaddr = dn.data_blkaddr;1633 if (is_hole)1634 map->m_flags |= F2FS_MAP_NEW;1635 } else if (is_hole) {1636 if (f2fs_compressed_file(inode) &&1637 f2fs_sanity_check_cluster(&dn)) {1638 err = -EFSCORRUPTED;1639 f2fs_handle_error(sbi,1640 ERROR_CORRUPTED_CLUSTER);1641 goto sync_out;1642 }1643 1644 switch (flag) {1645 case F2FS_GET_BLOCK_PRECACHE:1646 goto sync_out;1647 case F2FS_GET_BLOCK_BMAP:1648 map->m_pblk = 0;1649 goto sync_out;1650 case F2FS_GET_BLOCK_FIEMAP:1651 if (blkaddr == NULL_ADDR) {1652 if (map->m_next_pgofs)1653 *map->m_next_pgofs = pgofs + 1;1654 goto sync_out;1655 }1656 break;1657 case F2FS_GET_BLOCK_DIO:1658 if (map->m_next_pgofs)1659 *map->m_next_pgofs = pgofs + 1;1660 break;1661 default:1662 /* for defragment case */1663 if (map->m_next_pgofs)1664 *map->m_next_pgofs = pgofs + 1;1665 goto sync_out;1666 }1667 }1668 1669 if (flag == F2FS_GET_BLOCK_PRE_AIO)1670 goto skip;1671 1672 if (map->m_multidev_dio)1673 bidx = f2fs_target_device_index(sbi, blkaddr);1674 1675 if (map->m_len == 0) {1676 /* reserved delalloc block should be mapped for fiemap. */1677 if (blkaddr == NEW_ADDR)1678 map->m_flags |= F2FS_MAP_DELALLOC;1679 if (flag != F2FS_GET_BLOCK_DIO || !is_hole)1680 map->m_flags |= F2FS_MAP_MAPPED;1681 1682 map->m_pblk = blkaddr;1683 map->m_len = 1;1684 1685 if (map->m_multidev_dio)1686 map->m_bdev = FDEV(bidx).bdev;1687 } else if (map_is_mergeable(sbi, map, blkaddr, flag, bidx, ofs)) {1688 ofs++;1689 map->m_len++;1690 } else {1691 goto sync_out;1692 }1693 1694skip:1695 dn.ofs_in_node++;1696 pgofs++;1697 1698 /* preallocate blocks in batch for one dnode page */1699 if (flag == F2FS_GET_BLOCK_PRE_AIO &&1700 (pgofs == end || dn.ofs_in_node == end_offset)) {1701 1702 dn.ofs_in_node = ofs_in_node;1703 err = f2fs_reserve_new_blocks(&dn, prealloc);1704 if (err)1705 goto sync_out;1706 1707 map->m_len += dn.ofs_in_node - ofs_in_node;1708 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {1709 err = -ENOSPC;1710 goto sync_out;1711 }1712 dn.ofs_in_node = end_offset;1713 }1714 1715 if (flag == F2FS_GET_BLOCK_DIO && f2fs_lfs_mode(sbi) &&1716 map->m_may_create) {1717 /* the next block to be allocated may not be contiguous. */1718 if (GET_SEGOFF_FROM_SEG0(sbi, blkaddr) % BLKS_PER_SEC(sbi) ==1719 CAP_BLKS_PER_SEC(sbi) - 1)1720 goto sync_out;1721 }1722 1723 if (pgofs >= end)1724 goto sync_out;1725 else if (dn.ofs_in_node < end_offset)1726 goto next_block;1727 1728 if (flag == F2FS_GET_BLOCK_PRECACHE) {1729 if (map->m_flags & F2FS_MAP_MAPPED) {1730 unsigned int ofs = start_pgofs - map->m_lblk;1731 1732 f2fs_update_read_extent_cache_range(&dn,1733 start_pgofs, map->m_pblk + ofs,1734 map->m_len - ofs);1735 }1736 }1737 1738 f2fs_put_dnode(&dn);1739 1740 if (map->m_may_create) {1741 f2fs_map_unlock(sbi, flag);1742 f2fs_balance_fs(sbi, dn.node_changed);1743 }1744 goto next_dnode;1745 1746sync_out:1747 1748 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED) {1749 /*1750 * for hardware encryption, but to avoid potential issue1751 * in future1752 */1753 f2fs_wait_on_block_writeback_range(inode,1754 map->m_pblk, map->m_len);1755 1756 if (map->m_multidev_dio) {1757 block_t blk_addr = map->m_pblk;1758 1759 bidx = f2fs_target_device_index(sbi, map->m_pblk);1760 1761 map->m_bdev = FDEV(bidx).bdev;1762 map->m_pblk -= FDEV(bidx).start_blk;1763 1764 if (map->m_may_create)1765 f2fs_update_device_state(sbi, inode->i_ino,1766 blk_addr, map->m_len);1767 1768 f2fs_bug_on(sbi, blk_addr + map->m_len >1769 FDEV(bidx).end_blk + 1);1770 }1771 }1772 1773 if (flag == F2FS_GET_BLOCK_PRECACHE) {1774 if (map->m_flags & F2FS_MAP_MAPPED) {1775 unsigned int ofs = start_pgofs - map->m_lblk;1776 1777 f2fs_update_read_extent_cache_range(&dn,1778 start_pgofs, map->m_pblk + ofs,1779 map->m_len - ofs);1780 }1781 if (map->m_next_extent)1782 *map->m_next_extent = pgofs + 1;1783 }1784 f2fs_put_dnode(&dn);1785unlock_out:1786 if (map->m_may_create) {1787 f2fs_map_unlock(sbi, flag);1788 f2fs_balance_fs(sbi, dn.node_changed);1789 }1790out:1791 trace_f2fs_map_blocks(inode, map, flag, err);1792 return err;1793}1794 1795bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)1796{1797 struct f2fs_map_blocks map;1798 block_t last_lblk;1799 int err;1800 1801 if (pos + len > i_size_read(inode))1802 return false;1803 1804 map.m_lblk = F2FS_BYTES_TO_BLK(pos);1805 map.m_next_pgofs = NULL;1806 map.m_next_extent = NULL;1807 map.m_seg_type = NO_CHECK_TYPE;1808 map.m_may_create = false;1809 last_lblk = F2FS_BLK_ALIGN(pos + len);1810 1811 while (map.m_lblk < last_lblk) {1812 map.m_len = last_lblk - map.m_lblk;1813 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT);1814 if (err || map.m_len == 0)1815 return false;1816 map.m_lblk += map.m_len;1817 }1818 return true;1819}1820 1821static inline u64 bytes_to_blks(struct inode *inode, u64 bytes)1822{1823 return (bytes >> inode->i_blkbits);1824}1825 1826static inline u64 blks_to_bytes(struct inode *inode, u64 blks)1827{1828 return (blks << inode->i_blkbits);1829}1830 1831static int f2fs_xattr_fiemap(struct inode *inode,1832 struct fiemap_extent_info *fieinfo)1833{1834 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1835 struct page *page;1836 struct node_info ni;1837 __u64 phys = 0, len;1838 __u32 flags;1839 nid_t xnid = F2FS_I(inode)->i_xattr_nid;1840 int err = 0;1841 1842 if (f2fs_has_inline_xattr(inode)) {1843 int offset;1844 1845 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),1846 inode->i_ino, false);1847 if (!page)1848 return -ENOMEM;1849 1850 err = f2fs_get_node_info(sbi, inode->i_ino, &ni, false);1851 if (err) {1852 f2fs_put_page(page, 1);1853 return err;1854 }1855 1856 phys = blks_to_bytes(inode, ni.blk_addr);1857 offset = offsetof(struct f2fs_inode, i_addr) +1858 sizeof(__le32) * (DEF_ADDRS_PER_INODE -1859 get_inline_xattr_addrs(inode));1860 1861 phys += offset;1862 len = inline_xattr_size(inode);1863 1864 f2fs_put_page(page, 1);1865 1866 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;1867 1868 if (!xnid)1869 flags |= FIEMAP_EXTENT_LAST;1870 1871 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);1872 trace_f2fs_fiemap(inode, 0, phys, len, flags, err);1873 if (err)1874 return err;1875 }1876 1877 if (xnid) {1878 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);1879 if (!page)1880 return -ENOMEM;1881 1882 err = f2fs_get_node_info(sbi, xnid, &ni, false);1883 if (err) {1884 f2fs_put_page(page, 1);1885 return err;1886 }1887 1888 phys = blks_to_bytes(inode, ni.blk_addr);1889 len = inode->i_sb->s_blocksize;1890 1891 f2fs_put_page(page, 1);1892 1893 flags = FIEMAP_EXTENT_LAST;1894 }1895 1896 if (phys) {1897 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);1898 trace_f2fs_fiemap(inode, 0, phys, len, flags, err);1899 }1900 1901 return (err < 0 ? err : 0);1902}1903 1904static loff_t max_inode_blocks(struct inode *inode)1905{1906 loff_t result = ADDRS_PER_INODE(inode);1907 loff_t leaf_count = ADDRS_PER_BLOCK(inode);1908 1909 /* two direct node blocks */1910 result += (leaf_count * 2);1911 1912 /* two indirect node blocks */1913 leaf_count *= NIDS_PER_BLOCK;1914 result += (leaf_count * 2);1915 1916 /* one double indirect node block */1917 leaf_count *= NIDS_PER_BLOCK;1918 result += leaf_count;1919 1920 return result;1921}1922 1923int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,1924 u64 start, u64 len)1925{1926 struct f2fs_map_blocks map;1927 sector_t start_blk, last_blk;1928 pgoff_t next_pgofs;1929 u64 logical = 0, phys = 0, size = 0;1930 u32 flags = 0;1931 int ret = 0;1932 bool compr_cluster = false, compr_appended;1933 unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;1934 unsigned int count_in_cluster = 0;1935 loff_t maxbytes;1936 1937 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {1938 ret = f2fs_precache_extents(inode);1939 if (ret)1940 return ret;1941 }1942 1943 ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_XATTR);1944 if (ret)1945 return ret;1946 1947 inode_lock_shared(inode);1948 1949 maxbytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode));1950 if (start > maxbytes) {1951 ret = -EFBIG;1952 goto out;1953 }1954 1955 if (len > maxbytes || (maxbytes - len) < start)1956 len = maxbytes - start;1957 1958 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {1959 ret = f2fs_xattr_fiemap(inode, fieinfo);1960 goto out;1961 }1962 1963 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {1964 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);1965 if (ret != -EAGAIN)1966 goto out;1967 }1968 1969 if (bytes_to_blks(inode, len) == 0)1970 len = blks_to_bytes(inode, 1);1971 1972 start_blk = bytes_to_blks(inode, start);1973 last_blk = bytes_to_blks(inode, start + len - 1);1974 1975next:1976 memset(&map, 0, sizeof(map));1977 map.m_lblk = start_blk;1978 map.m_len = bytes_to_blks(inode, len);1979 map.m_next_pgofs = &next_pgofs;1980 map.m_seg_type = NO_CHECK_TYPE;1981 1982 if (compr_cluster) {1983 map.m_lblk += 1;1984 map.m_len = cluster_size - count_in_cluster;1985 }1986 1987 ret = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_FIEMAP);1988 if (ret)1989 goto out;1990 1991 /* HOLE */1992 if (!compr_cluster && !(map.m_flags & F2FS_MAP_FLAGS)) {1993 start_blk = next_pgofs;1994 1995 if (blks_to_bytes(inode, start_blk) < blks_to_bytes(inode,1996 max_inode_blocks(inode)))1997 goto prep_next;1998 1999 flags |= FIEMAP_EXTENT_LAST;2000 }2001 2002 compr_appended = false;2003 /* In a case of compressed cluster, append this to the last extent */2004 if (compr_cluster && ((map.m_flags & F2FS_MAP_DELALLOC) ||2005 !(map.m_flags & F2FS_MAP_FLAGS))) {2006 compr_appended = true;2007 goto skip_fill;2008 }2009 2010 if (size) {2011 flags |= FIEMAP_EXTENT_MERGED;2012 if (IS_ENCRYPTED(inode))2013 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;2014 2015 ret = fiemap_fill_next_extent(fieinfo, logical,2016 phys, size, flags);2017 trace_f2fs_fiemap(inode, logical, phys, size, flags, ret);2018 if (ret)2019 goto out;2020 size = 0;2021 }2022 2023 if (start_blk > last_blk)2024 goto out;2025 2026skip_fill:2027 if (map.m_pblk == COMPRESS_ADDR) {2028 compr_cluster = true;2029 count_in_cluster = 1;2030 } else if (compr_appended) {2031 unsigned int appended_blks = cluster_size -2032 count_in_cluster + 1;2033 size += blks_to_bytes(inode, appended_blks);2034 start_blk += appended_blks;2035 compr_cluster = false;2036 } else {2037 logical = blks_to_bytes(inode, start_blk);2038 phys = __is_valid_data_blkaddr(map.m_pblk) ?2039 blks_to_bytes(inode, map.m_pblk) : 0;2040 size = blks_to_bytes(inode, map.m_len);2041 flags = 0;2042 2043 if (compr_cluster) {2044 flags = FIEMAP_EXTENT_ENCODED;2045 count_in_cluster += map.m_len;2046 if (count_in_cluster == cluster_size) {2047 compr_cluster = false;2048 size += blks_to_bytes(inode, 1);2049 }2050 } else if (map.m_flags & F2FS_MAP_DELALLOC) {2051 flags = FIEMAP_EXTENT_UNWRITTEN;2052 }2053 2054 start_blk += bytes_to_blks(inode, size);2055 }2056 2057prep_next:2058 cond_resched();2059 if (fatal_signal_pending(current))2060 ret = -EINTR;2061 else2062 goto next;2063out:2064 if (ret == 1)2065 ret = 0;2066 2067 inode_unlock_shared(inode);2068 return ret;2069}2070 2071static inline loff_t f2fs_readpage_limit(struct inode *inode)2072{2073 if (IS_ENABLED(CONFIG_FS_VERITY) && IS_VERITY(inode))2074 return F2FS_BLK_TO_BYTES(max_file_blocks(inode));2075 2076 return i_size_read(inode);2077}2078 2079static inline blk_opf_t f2fs_ra_op_flags(struct readahead_control *rac)2080{2081 return rac ? REQ_RAHEAD : 0;2082}2083 2084static int f2fs_read_single_page(struct inode *inode, struct folio *folio,2085 unsigned nr_pages,2086 struct f2fs_map_blocks *map,2087 struct bio **bio_ret,2088 sector_t *last_block_in_bio,2089 struct readahead_control *rac)2090{2091 struct bio *bio = *bio_ret;2092 const unsigned blocksize = blks_to_bytes(inode, 1);2093 sector_t block_in_file;2094 sector_t last_block;2095 sector_t last_block_in_file;2096 sector_t block_nr;2097 pgoff_t index = folio_index(folio);2098 int ret = 0;2099 2100 block_in_file = (sector_t)index;2101 last_block = block_in_file + nr_pages;2102 last_block_in_file = bytes_to_blks(inode,2103 f2fs_readpage_limit(inode) + blocksize - 1);2104 if (last_block > last_block_in_file)2105 last_block = last_block_in_file;2106 2107 /* just zeroing out page which is beyond EOF */2108 if (block_in_file >= last_block)2109 goto zero_out;2110 /*2111 * Map blocks using the previous result first.2112 */2113 if ((map->m_flags & F2FS_MAP_MAPPED) &&2114 block_in_file > map->m_lblk &&2115 block_in_file < (map->m_lblk + map->m_len))2116 goto got_it;2117 2118 /*2119 * Then do more f2fs_map_blocks() calls until we are2120 * done with this page.2121 */2122 map->m_lblk = block_in_file;2123 map->m_len = last_block - block_in_file;2124 2125 ret = f2fs_map_blocks(inode, map, F2FS_GET_BLOCK_DEFAULT);2126 if (ret)2127 goto out;2128got_it:2129 if ((map->m_flags & F2FS_MAP_MAPPED)) {2130 block_nr = map->m_pblk + block_in_file - map->m_lblk;2131 folio_set_mappedtodisk(folio);2132 2133 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,2134 DATA_GENERIC_ENHANCE_READ)) {2135 ret = -EFSCORRUPTED;2136 goto out;2137 }2138 } else {2139zero_out:2140 folio_zero_segment(folio, 0, folio_size(folio));2141 if (f2fs_need_verity(inode, index) &&2142 !fsverity_verify_folio(folio)) {2143 ret = -EIO;2144 goto out;2145 }2146 if (!folio_test_uptodate(folio))2147 folio_mark_uptodate(folio);2148 folio_unlock(folio);2149 goto out;2150 }2151 2152 /*2153 * This page will go to BIO. Do we need to send this2154 * BIO off first?2155 */2156 if (bio && (!page_is_mergeable(F2FS_I_SB(inode), bio,2157 *last_block_in_bio, block_nr) ||2158 !f2fs_crypt_mergeable_bio(bio, inode, index, NULL))) {2159submit_and_realloc:2160 f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA);2161 bio = NULL;2162 }2163 if (bio == NULL) {2164 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,2165 f2fs_ra_op_flags(rac), index,2166 false);2167 if (IS_ERR(bio)) {2168 ret = PTR_ERR(bio);2169 bio = NULL;2170 goto out;2171 }2172 }2173 2174 /*2175 * If the page is under writeback, we need to wait for2176 * its completion to see the correct decrypted data.2177 */2178 f2fs_wait_on_block_writeback(inode, block_nr);2179 2180 if (!bio_add_folio(bio, folio, blocksize, 0))2181 goto submit_and_realloc;2182 2183 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);2184 f2fs_update_iostat(F2FS_I_SB(inode), NULL, FS_DATA_READ_IO,2185 F2FS_BLKSIZE);2186 *last_block_in_bio = block_nr;2187out:2188 *bio_ret = bio;2189 return ret;2190}2191 2192#ifdef CONFIG_F2FS_FS_COMPRESSION2193int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,2194 unsigned nr_pages, sector_t *last_block_in_bio,2195 struct readahead_control *rac, bool for_write)2196{2197 struct dnode_of_data dn;2198 struct inode *inode = cc->inode;2199 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2200 struct bio *bio = *bio_ret;2201 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;2202 sector_t last_block_in_file;2203 const unsigned blocksize = blks_to_bytes(inode, 1);2204 struct decompress_io_ctx *dic = NULL;2205 struct extent_info ei = {};2206 bool from_dnode = true;2207 int i;2208 int ret = 0;2209 2210 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));2211 2212 last_block_in_file = bytes_to_blks(inode,2213 f2fs_readpage_limit(inode) + blocksize - 1);2214 2215 /* get rid of pages beyond EOF */2216 for (i = 0; i < cc->cluster_size; i++) {2217 struct page *page = cc->rpages[i];2218 struct folio *folio;2219 2220 if (!page)2221 continue;2222 2223 folio = page_folio(page);2224 if ((sector_t)folio->index >= last_block_in_file) {2225 folio_zero_segment(folio, 0, folio_size(folio));2226 if (!folio_test_uptodate(folio))2227 folio_mark_uptodate(folio);2228 } else if (!folio_test_uptodate(folio)) {2229 continue;2230 }2231 folio_unlock(folio);2232 if (for_write)2233 folio_put(folio);2234 cc->rpages[i] = NULL;2235 cc->nr_rpages--;2236 }2237 2238 /* we are done since all pages are beyond EOF */2239 if (f2fs_cluster_is_empty(cc))2240 goto out;2241 2242 if (f2fs_lookup_read_extent_cache(inode, start_idx, &ei))2243 from_dnode = false;2244 2245 if (!from_dnode)2246 goto skip_reading_dnode;2247 2248 set_new_dnode(&dn, inode, NULL, NULL, 0);2249 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);2250 if (ret)2251 goto out;2252 2253 if (unlikely(f2fs_cp_error(sbi))) {2254 ret = -EIO;2255 goto out_put_dnode;2256 }2257 f2fs_bug_on(sbi, dn.data_blkaddr != COMPRESS_ADDR);2258 2259skip_reading_dnode:2260 for (i = 1; i < cc->cluster_size; i++) {2261 block_t blkaddr;2262 2263 blkaddr = from_dnode ? data_blkaddr(dn.inode, dn.node_page,2264 dn.ofs_in_node + i) :2265 ei.blk + i - 1;2266 2267 if (!__is_valid_data_blkaddr(blkaddr))2268 break;2269 2270 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {2271 ret = -EFAULT;2272 goto out_put_dnode;2273 }2274 cc->nr_cpages++;2275 2276 if (!from_dnode && i >= ei.c_len)2277 break;2278 }2279 2280 /* nothing to decompress */2281 if (cc->nr_cpages == 0) {2282 ret = 0;2283 goto out_put_dnode;2284 }2285 2286 dic = f2fs_alloc_dic(cc);2287 if (IS_ERR(dic)) {2288 ret = PTR_ERR(dic);2289 goto out_put_dnode;2290 }2291 2292 for (i = 0; i < cc->nr_cpages; i++) {2293 struct folio *folio = page_folio(dic->cpages[i]);2294 block_t blkaddr;2295 struct bio_post_read_ctx *ctx;2296 2297 blkaddr = from_dnode ? data_blkaddr(dn.inode, dn.node_page,2298 dn.ofs_in_node + i + 1) :2299 ei.blk + i;2300 2301 f2fs_wait_on_block_writeback(inode, blkaddr);2302 2303 if (f2fs_load_compressed_page(sbi, folio_page(folio, 0),2304 blkaddr)) {2305 if (atomic_dec_and_test(&dic->remaining_pages)) {2306 f2fs_decompress_cluster(dic, true);2307 break;2308 }2309 continue;2310 }2311 2312 if (bio && (!page_is_mergeable(sbi, bio,2313 *last_block_in_bio, blkaddr) ||2314 !f2fs_crypt_mergeable_bio(bio, inode, folio->index, NULL))) {2315submit_and_realloc:2316 f2fs_submit_read_bio(sbi, bio, DATA);2317 bio = NULL;2318 }2319 2320 if (!bio) {2321 bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,2322 f2fs_ra_op_flags(rac),2323 folio->index, for_write);2324 if (IS_ERR(bio)) {2325 ret = PTR_ERR(bio);2326 f2fs_decompress_end_io(dic, ret, true);2327 f2fs_put_dnode(&dn);2328 *bio_ret = NULL;2329 return ret;2330 }2331 }2332 2333 if (!bio_add_folio(bio, folio, blocksize, 0))2334 goto submit_and_realloc;2335 2336 ctx = get_post_read_ctx(bio);2337 ctx->enabled_steps |= STEP_DECOMPRESS;2338 refcount_inc(&dic->refcnt);2339 2340 inc_page_count(sbi, F2FS_RD_DATA);2341 f2fs_update_iostat(sbi, inode, FS_DATA_READ_IO, F2FS_BLKSIZE);2342 *last_block_in_bio = blkaddr;2343 }2344 2345 if (from_dnode)2346 f2fs_put_dnode(&dn);2347 2348 *bio_ret = bio;2349 return 0;2350 2351out_put_dnode:2352 if (from_dnode)2353 f2fs_put_dnode(&dn);2354out:2355 for (i = 0; i < cc->cluster_size; i++) {2356 if (cc->rpages[i]) {2357 ClearPageUptodate(cc->rpages[i]);2358 unlock_page(cc->rpages[i]);2359 }2360 }2361 *bio_ret = bio;2362 return ret;2363}2364#endif2365 2366/*2367 * This function was originally taken from fs/mpage.c, and customized for f2fs.2368 * Major change was from block_size == page_size in f2fs by default.2369 */2370static int f2fs_mpage_readpages(struct inode *inode,2371 struct readahead_control *rac, struct folio *folio)2372{2373 struct bio *bio = NULL;2374 sector_t last_block_in_bio = 0;2375 struct f2fs_map_blocks map;2376#ifdef CONFIG_F2FS_FS_COMPRESSION2377 struct compress_ctx cc = {2378 .inode = inode,2379 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,2380 .cluster_size = F2FS_I(inode)->i_cluster_size,2381 .cluster_idx = NULL_CLUSTER,2382 .rpages = NULL,2383 .cpages = NULL,2384 .nr_rpages = 0,2385 .nr_cpages = 0,2386 };2387 pgoff_t nc_cluster_idx = NULL_CLUSTER;2388#endif2389 unsigned nr_pages = rac ? readahead_count(rac) : 1;2390 unsigned max_nr_pages = nr_pages;2391 pgoff_t index;2392 int ret = 0;2393 2394 map.m_pblk = 0;2395 map.m_lblk = 0;2396 map.m_len = 0;2397 map.m_flags = 0;2398 map.m_next_pgofs = NULL;2399 map.m_next_extent = NULL;2400 map.m_seg_type = NO_CHECK_TYPE;2401 map.m_may_create = false;2402 2403 for (; nr_pages; nr_pages--) {2404 if (rac) {2405 folio = readahead_folio(rac);2406 prefetchw(&folio->flags);2407 }2408 2409 index = folio_index(folio);2410 2411#ifdef CONFIG_F2FS_FS_COMPRESSION2412 if (!f2fs_compressed_file(inode))2413 goto read_single_page;2414 2415 /* there are remained compressed pages, submit them */2416 if (!f2fs_cluster_can_merge_page(&cc, index)) {2417 ret = f2fs_read_multi_pages(&cc, &bio,2418 max_nr_pages,2419 &last_block_in_bio,2420 rac, false);2421 f2fs_destroy_compress_ctx(&cc, false);2422 if (ret)2423 goto set_error_page;2424 }2425 if (cc.cluster_idx == NULL_CLUSTER) {2426 if (nc_cluster_idx == index >> cc.log_cluster_size)2427 goto read_single_page;2428 2429 ret = f2fs_is_compressed_cluster(inode, index);2430 if (ret < 0)2431 goto set_error_page;2432 else if (!ret) {2433 nc_cluster_idx =2434 index >> cc.log_cluster_size;2435 goto read_single_page;2436 }2437 2438 nc_cluster_idx = NULL_CLUSTER;2439 }2440 ret = f2fs_init_compress_ctx(&cc);2441 if (ret)2442 goto set_error_page;2443 2444 f2fs_compress_ctx_add_page(&cc, folio);2445 2446 goto next_page;2447read_single_page:2448#endif2449 2450 ret = f2fs_read_single_page(inode, folio, max_nr_pages, &map,2451 &bio, &last_block_in_bio, rac);2452 if (ret) {2453#ifdef CONFIG_F2FS_FS_COMPRESSION2454set_error_page:2455#endif2456 folio_zero_segment(folio, 0, folio_size(folio));2457 folio_unlock(folio);2458 }2459#ifdef CONFIG_F2FS_FS_COMPRESSION2460next_page:2461#endif2462 2463#ifdef CONFIG_F2FS_FS_COMPRESSION2464 if (f2fs_compressed_file(inode)) {2465 /* last page */2466 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {2467 ret = f2fs_read_multi_pages(&cc, &bio,2468 max_nr_pages,2469 &last_block_in_bio,2470 rac, false);2471 f2fs_destroy_compress_ctx(&cc, false);2472 }2473 }2474#endif2475 }2476 if (bio)2477 f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA);2478 return ret;2479}2480 2481static int f2fs_read_data_folio(struct file *file, struct folio *folio)2482{2483 struct inode *inode = folio_file_mapping(folio)->host;2484 int ret = -EAGAIN;2485 2486 trace_f2fs_readpage(folio, DATA);2487 2488 if (!f2fs_is_compress_backend_ready(inode)) {2489 folio_unlock(folio);2490 return -EOPNOTSUPP;2491 }2492 2493 /* If the file has inline data, try to read it directly */2494 if (f2fs_has_inline_data(inode))2495 ret = f2fs_read_inline_data(inode, folio);2496 if (ret == -EAGAIN)2497 ret = f2fs_mpage_readpages(inode, NULL, folio);2498 return ret;2499}2500 2501static void f2fs_readahead(struct readahead_control *rac)2502{2503 struct inode *inode = rac->mapping->host;2504 2505 trace_f2fs_readpages(inode, readahead_index(rac), readahead_count(rac));2506 2507 if (!f2fs_is_compress_backend_ready(inode))2508 return;2509 2510 /* If the file has inline data, skip readahead */2511 if (f2fs_has_inline_data(inode))2512 return;2513 2514 f2fs_mpage_readpages(inode, rac, NULL);2515}2516 2517int f2fs_encrypt_one_page(struct f2fs_io_info *fio)2518{2519 struct inode *inode = fio->page->mapping->host;2520 struct page *mpage, *page;2521 gfp_t gfp_flags = GFP_NOFS;2522 2523 if (!f2fs_encrypted_file(inode))2524 return 0;2525 2526 page = fio->compressed_page ? fio->compressed_page : fio->page;2527 2528 if (fscrypt_inode_uses_inline_crypto(inode))2529 return 0;2530 2531retry_encrypt:2532 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,2533 PAGE_SIZE, 0, gfp_flags);2534 if (IS_ERR(fio->encrypted_page)) {2535 /* flush pending IOs and wait for a while in the ENOMEM case */2536 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {2537 f2fs_flush_merged_writes(fio->sbi);2538 memalloc_retry_wait(GFP_NOFS);2539 gfp_flags |= __GFP_NOFAIL;2540 goto retry_encrypt;2541 }2542 return PTR_ERR(fio->encrypted_page);2543 }2544 2545 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);2546 if (mpage) {2547 if (PageUptodate(mpage))2548 memcpy(page_address(mpage),2549 page_address(fio->encrypted_page), PAGE_SIZE);2550 f2fs_put_page(mpage, 1);2551 }2552 return 0;2553}2554 2555static inline bool check_inplace_update_policy(struct inode *inode,2556 struct f2fs_io_info *fio)2557{2558 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2559 2560 if (IS_F2FS_IPU_HONOR_OPU_WRITE(sbi) &&2561 is_inode_flag_set(inode, FI_OPU_WRITE))2562 return false;2563 if (IS_F2FS_IPU_FORCE(sbi))2564 return true;2565 if (IS_F2FS_IPU_SSR(sbi) && f2fs_need_SSR(sbi))2566 return true;2567 if (IS_F2FS_IPU_UTIL(sbi) && utilization(sbi) > SM_I(sbi)->min_ipu_util)2568 return true;2569 if (IS_F2FS_IPU_SSR_UTIL(sbi) && f2fs_need_SSR(sbi) &&2570 utilization(sbi) > SM_I(sbi)->min_ipu_util)2571 return true;2572 2573 /*2574 * IPU for rewrite async pages2575 */2576 if (IS_F2FS_IPU_ASYNC(sbi) && fio && fio->op == REQ_OP_WRITE &&2577 !(fio->op_flags & REQ_SYNC) && !IS_ENCRYPTED(inode))2578 return true;2579 2580 /* this is only set during fdatasync */2581 if (IS_F2FS_IPU_FSYNC(sbi) && is_inode_flag_set(inode, FI_NEED_IPU))2582 return true;2583 2584 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&2585 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))2586 return true;2587 2588 return false;2589}2590 2591bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)2592{2593 /* swap file is migrating in aligned write mode */2594 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))2595 return false;2596 2597 if (f2fs_is_pinned_file(inode))2598 return true;2599 2600 /* if this is cold file, we should overwrite to avoid fragmentation */2601 if (file_is_cold(inode) && !is_inode_flag_set(inode, FI_OPU_WRITE))2602 return true;2603 2604 return check_inplace_update_policy(inode, fio);2605}2606 2607bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)2608{2609 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2610 2611 /* The below cases were checked when setting it. */2612 if (f2fs_is_pinned_file(inode))2613 return false;2614 if (fio && is_sbi_flag_set(sbi, SBI_NEED_FSCK))2615 return true;2616 if (f2fs_lfs_mode(sbi))2617 return true;2618 if (S_ISDIR(inode->i_mode))2619 return true;2620 if (IS_NOQUOTA(inode))2621 return true;2622 if (f2fs_used_in_atomic_write(inode))2623 return true;2624 /* rewrite low ratio compress data w/ OPU mode to avoid fragmentation */2625 if (f2fs_compressed_file(inode) &&2626 F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER &&2627 is_inode_flag_set(inode, FI_ENABLE_COMPRESS))2628 return true;2629 2630 /* swap file is migrating in aligned write mode */2631 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))2632 return true;2633 2634 if (is_inode_flag_set(inode, FI_OPU_WRITE))2635 return true;2636 2637 if (fio) {2638 if (page_private_gcing(fio->page))2639 return true;2640 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&2641 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))2642 return true;2643 }2644 return false;2645}2646 2647static inline bool need_inplace_update(struct f2fs_io_info *fio)2648{2649 struct inode *inode = fio->page->mapping->host;2650 2651 if (f2fs_should_update_outplace(inode, fio))2652 return false;2653 2654 return f2fs_should_update_inplace(inode, fio);2655}2656 2657int f2fs_do_write_data_page(struct f2fs_io_info *fio)2658{2659 struct folio *folio = page_folio(fio->page);2660 struct inode *inode = folio->mapping->host;2661 struct dnode_of_data dn;2662 struct node_info ni;2663 bool ipu_force = false;2664 bool atomic_commit;2665 int err = 0;2666 2667 /* Use COW inode to make dnode_of_data for atomic write */2668 atomic_commit = f2fs_is_atomic_file(inode) &&2669 page_private_atomic(folio_page(folio, 0));2670 if (atomic_commit)2671 set_new_dnode(&dn, F2FS_I(inode)->cow_inode, NULL, NULL, 0);2672 else2673 set_new_dnode(&dn, inode, NULL, NULL, 0);2674 2675 if (need_inplace_update(fio) &&2676 f2fs_lookup_read_extent_cache_block(inode, folio->index,2677 &fio->old_blkaddr)) {2678 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,2679 DATA_GENERIC_ENHANCE))2680 return -EFSCORRUPTED;2681 2682 ipu_force = true;2683 fio->need_lock = LOCK_DONE;2684 goto got_it;2685 }2686 2687 /* Deadlock due to between page->lock and f2fs_lock_op */2688 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))2689 return -EAGAIN;2690 2691 err = f2fs_get_dnode_of_data(&dn, folio->index, LOOKUP_NODE);2692 if (err)2693 goto out;2694 2695 fio->old_blkaddr = dn.data_blkaddr;2696 2697 /* This page is already truncated */2698 if (fio->old_blkaddr == NULL_ADDR) {2699 folio_clear_uptodate(folio);2700 clear_page_private_gcing(folio_page(folio, 0));2701 goto out_writepage;2702 }2703got_it:2704 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&2705 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,2706 DATA_GENERIC_ENHANCE)) {2707 err = -EFSCORRUPTED;2708 goto out_writepage;2709 }2710 2711 /* wait for GCed page writeback via META_MAPPING */2712 if (fio->meta_gc)2713 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);2714 2715 /*2716 * If current allocation needs SSR,2717 * it had better in-place writes for updated data.2718 */2719 if (ipu_force ||2720 (__is_valid_data_blkaddr(fio->old_blkaddr) &&2721 need_inplace_update(fio))) {2722 err = f2fs_encrypt_one_page(fio);2723 if (err)2724 goto out_writepage;2725 2726 folio_start_writeback(folio);2727 f2fs_put_dnode(&dn);2728 if (fio->need_lock == LOCK_REQ)2729 f2fs_unlock_op(fio->sbi);2730 err = f2fs_inplace_write_data(fio);2731 if (err) {2732 if (fscrypt_inode_uses_fs_layer_crypto(inode))2733 fscrypt_finalize_bounce_page(&fio->encrypted_page);2734 folio_end_writeback(folio);2735 } else {2736 set_inode_flag(inode, FI_UPDATE_WRITE);2737 }2738 trace_f2fs_do_write_data_page(folio, IPU);2739 return err;2740 }2741 2742 if (fio->need_lock == LOCK_RETRY) {2743 if (!f2fs_trylock_op(fio->sbi)) {2744 err = -EAGAIN;2745 goto out_writepage;2746 }2747 fio->need_lock = LOCK_REQ;2748 }2749 2750 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni, false);2751 if (err)2752 goto out_writepage;2753 2754 fio->version = ni.version;2755 2756 err = f2fs_encrypt_one_page(fio);2757 if (err)2758 goto out_writepage;2759 2760 folio_start_writeback(folio);2761 2762 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)2763 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);2764 2765 /* LFS mode write path */2766 f2fs_outplace_write_data(&dn, fio);2767 trace_f2fs_do_write_data_page(folio, OPU);2768 set_inode_flag(inode, FI_APPEND_WRITE);2769 if (atomic_commit)2770 clear_page_private_atomic(folio_page(folio, 0));2771out_writepage:2772 f2fs_put_dnode(&dn);2773out:2774 if (fio->need_lock == LOCK_REQ)2775 f2fs_unlock_op(fio->sbi);2776 return err;2777}2778 2779int f2fs_write_single_data_page(struct folio *folio, int *submitted,2780 struct bio **bio,2781 sector_t *last_block,2782 struct writeback_control *wbc,2783 enum iostat_type io_type,2784 int compr_blocks,2785 bool allow_balance)2786{2787 struct inode *inode = folio->mapping->host;2788 struct page *page = folio_page(folio, 0);2789 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2790 loff_t i_size = i_size_read(inode);2791 const pgoff_t end_index = ((unsigned long long)i_size)2792 >> PAGE_SHIFT;2793 loff_t psize = (loff_t)(folio->index + 1) << PAGE_SHIFT;2794 unsigned offset = 0;2795 bool need_balance_fs = false;2796 bool quota_inode = IS_NOQUOTA(inode);2797 int err = 0;2798 struct f2fs_io_info fio = {2799 .sbi = sbi,2800 .ino = inode->i_ino,2801 .type = DATA,2802 .op = REQ_OP_WRITE,2803 .op_flags = wbc_to_write_flags(wbc),2804 .old_blkaddr = NULL_ADDR,2805 .page = page,2806 .encrypted_page = NULL,2807 .submitted = 0,2808 .compr_blocks = compr_blocks,2809 .need_lock = compr_blocks ? LOCK_DONE : LOCK_RETRY,2810 .meta_gc = f2fs_meta_inode_gc_required(inode) ? 1 : 0,2811 .io_type = io_type,2812 .io_wbc = wbc,2813 .bio = bio,2814 .last_block = last_block,2815 };2816 2817 trace_f2fs_writepage(folio, DATA);2818 2819 /* we should bypass data pages to proceed the kworker jobs */2820 if (unlikely(f2fs_cp_error(sbi))) {2821 mapping_set_error(folio->mapping, -EIO);2822 /*2823 * don't drop any dirty dentry pages for keeping lastest2824 * directory structure.2825 */2826 if (S_ISDIR(inode->i_mode) &&2827 !is_sbi_flag_set(sbi, SBI_IS_CLOSE))2828 goto redirty_out;2829 2830 /* keep data pages in remount-ro mode */2831 if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)2832 goto redirty_out;2833 goto out;2834 }2835 2836 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))2837 goto redirty_out;2838 2839 if (folio->index < end_index ||2840 f2fs_verity_in_progress(inode) ||2841 compr_blocks)2842 goto write;2843 2844 /*2845 * If the offset is out-of-range of file size,2846 * this page does not have to be written to disk.2847 */2848 offset = i_size & (PAGE_SIZE - 1);2849 if ((folio->index >= end_index + 1) || !offset)2850 goto out;2851 2852 folio_zero_segment(folio, offset, folio_size(folio));2853write:2854 /* Dentry/quota blocks are controlled by checkpoint */2855 if (S_ISDIR(inode->i_mode) || quota_inode) {2856 /*2857 * We need to wait for node_write to avoid block allocation during2858 * checkpoint. This can only happen to quota writes which can cause2859 * the below discard race condition.2860 */2861 if (quota_inode)2862 f2fs_down_read(&sbi->node_write);2863 2864 fio.need_lock = LOCK_DONE;2865 err = f2fs_do_write_data_page(&fio);2866 2867 if (quota_inode)2868 f2fs_up_read(&sbi->node_write);2869 2870 goto done;2871 }2872 2873 if (!wbc->for_reclaim)2874 need_balance_fs = true;2875 else if (has_not_enough_free_secs(sbi, 0, 0))2876 goto redirty_out;2877 else2878 set_inode_flag(inode, FI_HOT_DATA);2879 2880 err = -EAGAIN;2881 if (f2fs_has_inline_data(inode)) {2882 err = f2fs_write_inline_data(inode, folio);2883 if (!err)2884 goto out;2885 }2886 2887 if (err == -EAGAIN) {2888 err = f2fs_do_write_data_page(&fio);2889 if (err == -EAGAIN) {2890 f2fs_bug_on(sbi, compr_blocks);2891 fio.need_lock = LOCK_REQ;2892 err = f2fs_do_write_data_page(&fio);2893 }2894 }2895 2896 if (err) {2897 file_set_keep_isize(inode);2898 } else {2899 spin_lock(&F2FS_I(inode)->i_size_lock);2900 if (F2FS_I(inode)->last_disk_size < psize)2901 F2FS_I(inode)->last_disk_size = psize;2902 spin_unlock(&F2FS_I(inode)->i_size_lock);2903 }2904 2905done:2906 if (err && err != -ENOENT)2907 goto redirty_out;2908 2909out:2910 inode_dec_dirty_pages(inode);2911 if (err) {2912 folio_clear_uptodate(folio);2913 clear_page_private_gcing(page);2914 }2915 2916 if (wbc->for_reclaim) {2917 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);2918 clear_inode_flag(inode, FI_HOT_DATA);2919 f2fs_remove_dirty_inode(inode);2920 submitted = NULL;2921 }2922 folio_unlock(folio);2923 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&2924 !F2FS_I(inode)->wb_task && allow_balance)2925 f2fs_balance_fs(sbi, need_balance_fs);2926 2927 if (unlikely(f2fs_cp_error(sbi))) {2928 f2fs_submit_merged_write(sbi, DATA);2929 if (bio && *bio)2930 f2fs_submit_merged_ipu_write(sbi, bio, NULL);2931 submitted = NULL;2932 }2933 2934 if (submitted)2935 *submitted = fio.submitted;2936 2937 return 0;2938 2939redirty_out:2940 folio_redirty_for_writepage(wbc, folio);2941 /*2942 * pageout() in MM translates EAGAIN, so calls handle_write_error()2943 * -> mapping_set_error() -> set_bit(AS_EIO, ...).2944 * file_write_and_wait_range() will see EIO error, which is critical2945 * to return value of fsync() followed by atomic_write failure to user.2946 */2947 if (!err || wbc->for_reclaim)2948 return AOP_WRITEPAGE_ACTIVATE;2949 folio_unlock(folio);2950 return err;2951}2952 2953static int f2fs_write_data_page(struct page *page,2954 struct writeback_control *wbc)2955{2956 struct folio *folio = page_folio(page);2957#ifdef CONFIG_F2FS_FS_COMPRESSION2958 struct inode *inode = folio->mapping->host;2959 2960 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))2961 goto out;2962 2963 if (f2fs_compressed_file(inode)) {2964 if (f2fs_is_compressed_cluster(inode, folio->index)) {2965 folio_redirty_for_writepage(wbc, folio);2966 return AOP_WRITEPAGE_ACTIVATE;2967 }2968 }2969out:2970#endif2971 2972 return f2fs_write_single_data_page(folio, NULL, NULL, NULL,2973 wbc, FS_DATA_IO, 0, true);2974}2975 2976/*2977 * This function was copied from write_cache_pages from mm/page-writeback.c.2978 * The major change is making write step of cold data page separately from2979 * warm/hot data page.2980 */2981static int f2fs_write_cache_pages(struct address_space *mapping,2982 struct writeback_control *wbc,2983 enum iostat_type io_type)2984{2985 int ret = 0;2986 int done = 0, retry = 0;2987 struct page *pages_local[F2FS_ONSTACK_PAGES];2988 struct page **pages = pages_local;2989 struct folio_batch fbatch;2990 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);2991 struct bio *bio = NULL;2992 sector_t last_block;2993#ifdef CONFIG_F2FS_FS_COMPRESSION2994 struct inode *inode = mapping->host;2995 struct compress_ctx cc = {2996 .inode = inode,2997 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,2998 .cluster_size = F2FS_I(inode)->i_cluster_size,2999 .cluster_idx = NULL_CLUSTER,3000 .rpages = NULL,3001 .nr_rpages = 0,3002 .cpages = NULL,3003 .valid_nr_cpages = 0,3004 .rbuf = NULL,3005 .cbuf = NULL,3006 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,3007 .private = NULL,3008 };3009#endif3010 int nr_folios, p, idx;3011 int nr_pages;3012 unsigned int max_pages = F2FS_ONSTACK_PAGES;3013 pgoff_t index;3014 pgoff_t end; /* Inclusive */3015 pgoff_t done_index;3016 int range_whole = 0;3017 xa_mark_t tag;3018 int nwritten = 0;3019 int submitted = 0;3020 int i;3021 3022#ifdef CONFIG_F2FS_FS_COMPRESSION3023 if (f2fs_compressed_file(inode) &&3024 1 << cc.log_cluster_size > F2FS_ONSTACK_PAGES) {3025 pages = f2fs_kzalloc(sbi, sizeof(struct page *) <<3026 cc.log_cluster_size, GFP_NOFS | __GFP_NOFAIL);3027 max_pages = 1 << cc.log_cluster_size;3028 }3029#endif3030 3031 folio_batch_init(&fbatch);3032 3033 if (get_dirty_pages(mapping->host) <=3034 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)3035 set_inode_flag(mapping->host, FI_HOT_DATA);3036 else3037 clear_inode_flag(mapping->host, FI_HOT_DATA);3038 3039 if (wbc->range_cyclic) {3040 index = mapping->writeback_index; /* prev offset */3041 end = -1;3042 } else {3043 index = wbc->range_start >> PAGE_SHIFT;3044 end = wbc->range_end >> PAGE_SHIFT;3045 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)3046 range_whole = 1;3047 }3048 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)3049 tag = PAGECACHE_TAG_TOWRITE;3050 else3051 tag = PAGECACHE_TAG_DIRTY;3052retry:3053 retry = 0;3054 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)3055 tag_pages_for_writeback(mapping, index, end);3056 done_index = index;3057 while (!done && !retry && (index <= end)) {3058 nr_pages = 0;3059again:3060 nr_folios = filemap_get_folios_tag(mapping, &index, end,3061 tag, &fbatch);3062 if (nr_folios == 0) {3063 if (nr_pages)3064 goto write;3065 break;3066 }3067 3068 for (i = 0; i < nr_folios; i++) {3069 struct folio *folio = fbatch.folios[i];3070 3071 idx = 0;3072 p = folio_nr_pages(folio);3073add_more:3074 pages[nr_pages] = folio_page(folio, idx);3075 folio_get(folio);3076 if (++nr_pages == max_pages) {3077 index = folio->index + idx + 1;3078 folio_batch_release(&fbatch);3079 goto write;3080 }3081 if (++idx < p)3082 goto add_more;3083 }3084 folio_batch_release(&fbatch);3085 goto again;3086write:3087 for (i = 0; i < nr_pages; i++) {3088 struct page *page = pages[i];3089 struct folio *folio = page_folio(page);3090 bool need_readd;3091readd:3092 need_readd = false;3093#ifdef CONFIG_F2FS_FS_COMPRESSION3094 if (f2fs_compressed_file(inode)) {3095 void *fsdata = NULL;3096 struct page *pagep;3097 int ret2;3098 3099 ret = f2fs_init_compress_ctx(&cc);3100 if (ret) {3101 done = 1;3102 break;3103 }3104 3105 if (!f2fs_cluster_can_merge_page(&cc,3106 folio->index)) {3107 ret = f2fs_write_multi_pages(&cc,3108 &submitted, wbc, io_type);3109 if (!ret)3110 need_readd = true;3111 goto result;3112 }3113 3114 if (unlikely(f2fs_cp_error(sbi)))3115 goto lock_folio;3116 3117 if (!f2fs_cluster_is_empty(&cc))3118 goto lock_folio;3119 3120 if (f2fs_all_cluster_page_ready(&cc,3121 pages, i, nr_pages, true))3122 goto lock_folio;3123 3124 ret2 = f2fs_prepare_compress_overwrite(3125 inode, &pagep,3126 folio->index, &fsdata);3127 if (ret2 < 0) {3128 ret = ret2;3129 done = 1;3130 break;3131 } else if (ret2 &&3132 (!f2fs_compress_write_end(inode,3133 fsdata, folio->index, 1) ||3134 !f2fs_all_cluster_page_ready(&cc,3135 pages, i, nr_pages,3136 false))) {3137 retry = 1;3138 break;3139 }3140 }3141#endif3142 /* give a priority to WB_SYNC threads */3143 if (atomic_read(&sbi->wb_sync_req[DATA]) &&3144 wbc->sync_mode == WB_SYNC_NONE) {3145 done = 1;3146 break;3147 }3148#ifdef CONFIG_F2FS_FS_COMPRESSION3149lock_folio:3150#endif3151 done_index = folio->index;3152retry_write:3153 folio_lock(folio);3154 3155 if (unlikely(folio->mapping != mapping)) {3156continue_unlock:3157 folio_unlock(folio);3158 continue;3159 }3160 3161 if (!folio_test_dirty(folio)) {3162 /* someone wrote it for us */3163 goto continue_unlock;3164 }3165 3166 if (folio_test_writeback(folio)) {3167 if (wbc->sync_mode == WB_SYNC_NONE)3168 goto continue_unlock;3169 f2fs_wait_on_page_writeback(&folio->page, DATA, true, true);3170 }3171 3172 if (!folio_clear_dirty_for_io(folio))3173 goto continue_unlock;3174 3175#ifdef CONFIG_F2FS_FS_COMPRESSION3176 if (f2fs_compressed_file(inode)) {3177 folio_get(folio);3178 f2fs_compress_ctx_add_page(&cc, folio);3179 continue;3180 }3181#endif3182 ret = f2fs_write_single_data_page(folio,3183 &submitted, &bio, &last_block,3184 wbc, io_type, 0, true);3185 if (ret == AOP_WRITEPAGE_ACTIVATE)3186 folio_unlock(folio);3187#ifdef CONFIG_F2FS_FS_COMPRESSION3188result:3189#endif3190 nwritten += submitted;3191 wbc->nr_to_write -= submitted;3192 3193 if (unlikely(ret)) {3194 /*3195 * keep nr_to_write, since vfs uses this to3196 * get # of written pages.3197 */3198 if (ret == AOP_WRITEPAGE_ACTIVATE) {3199 ret = 0;3200 goto next;3201 } else if (ret == -EAGAIN) {3202 ret = 0;3203 if (wbc->sync_mode == WB_SYNC_ALL) {3204 f2fs_io_schedule_timeout(3205 DEFAULT_IO_TIMEOUT);3206 goto retry_write;3207 }3208 goto next;3209 }3210 done_index = folio_next_index(folio);3211 done = 1;3212 break;3213 }3214 3215 if (wbc->nr_to_write <= 0 &&3216 wbc->sync_mode == WB_SYNC_NONE) {3217 done = 1;3218 break;3219 }3220next:3221 if (need_readd)3222 goto readd;3223 }3224 release_pages(pages, nr_pages);3225 cond_resched();3226 }3227#ifdef CONFIG_F2FS_FS_COMPRESSION3228 /* flush remained pages in compress cluster */3229 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {3230 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);3231 nwritten += submitted;3232 wbc->nr_to_write -= submitted;3233 if (ret) {3234 done = 1;3235 retry = 0;3236 }3237 }3238 if (f2fs_compressed_file(inode))3239 f2fs_destroy_compress_ctx(&cc, false);3240#endif3241 if (retry) {3242 index = 0;3243 end = -1;3244 goto retry;3245 }3246 if (wbc->range_cyclic && !done)3247 done_index = 0;3248 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))3249 mapping->writeback_index = done_index;3250 3251 if (nwritten)3252 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,3253 NULL, 0, DATA);3254 /* submit cached bio of IPU write */3255 if (bio)3256 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);3257 3258#ifdef CONFIG_F2FS_FS_COMPRESSION3259 if (pages != pages_local)3260 kfree(pages);3261#endif3262 3263 return ret;3264}3265 3266static inline bool __should_serialize_io(struct inode *inode,3267 struct writeback_control *wbc)3268{3269 /* to avoid deadlock in path of data flush */3270 if (F2FS_I(inode)->wb_task)3271 return false;3272 3273 if (!S_ISREG(inode->i_mode))3274 return false;3275 if (IS_NOQUOTA(inode))3276 return false;3277 3278 if (f2fs_need_compress_data(inode))3279 return true;3280 if (wbc->sync_mode != WB_SYNC_ALL)3281 return true;3282 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)3283 return true;3284 return false;3285}3286 3287static int __f2fs_write_data_pages(struct address_space *mapping,3288 struct writeback_control *wbc,3289 enum iostat_type io_type)3290{3291 struct inode *inode = mapping->host;3292 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3293 struct blk_plug plug;3294 int ret;3295 bool locked = false;3296 3297 /* deal with chardevs and other special file */3298 if (!mapping->a_ops->writepage)3299 return 0;3300 3301 /* skip writing if there is no dirty page in this inode */3302 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)3303 return 0;3304 3305 /* during POR, we don't need to trigger writepage at all. */3306 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))3307 goto skip_write;3308 3309 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&3310 wbc->sync_mode == WB_SYNC_NONE &&3311 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&3312 f2fs_available_free_memory(sbi, DIRTY_DENTS))3313 goto skip_write;3314 3315 /* skip writing in file defragment preparing stage */3316 if (is_inode_flag_set(inode, FI_SKIP_WRITES))3317 goto skip_write;3318 3319 trace_f2fs_writepages(mapping->host, wbc, DATA);3320 3321 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */3322 if (wbc->sync_mode == WB_SYNC_ALL)3323 atomic_inc(&sbi->wb_sync_req[DATA]);3324 else if (atomic_read(&sbi->wb_sync_req[DATA])) {3325 /* to avoid potential deadlock */3326 if (current->plug)3327 blk_finish_plug(current->plug);3328 goto skip_write;3329 }3330 3331 if (__should_serialize_io(inode, wbc)) {3332 mutex_lock(&sbi->writepages);3333 locked = true;3334 }3335 3336 blk_start_plug(&plug);3337 ret = f2fs_write_cache_pages(mapping, wbc, io_type);3338 blk_finish_plug(&plug);3339 3340 if (locked)3341 mutex_unlock(&sbi->writepages);3342 3343 if (wbc->sync_mode == WB_SYNC_ALL)3344 atomic_dec(&sbi->wb_sync_req[DATA]);3345 /*3346 * if some pages were truncated, we cannot guarantee its mapping->host3347 * to detect pending bios.3348 */3349 3350 f2fs_remove_dirty_inode(inode);3351 return ret;3352 3353skip_write:3354 wbc->pages_skipped += get_dirty_pages(inode);3355 trace_f2fs_writepages(mapping->host, wbc, DATA);3356 return 0;3357}3358 3359static int f2fs_write_data_pages(struct address_space *mapping,3360 struct writeback_control *wbc)3361{3362 struct inode *inode = mapping->host;3363 3364 return __f2fs_write_data_pages(mapping, wbc,3365 F2FS_I(inode)->cp_task == current ?3366 FS_CP_DATA_IO : FS_DATA_IO);3367}3368 3369void f2fs_write_failed(struct inode *inode, loff_t to)3370{3371 loff_t i_size = i_size_read(inode);3372 3373 if (IS_NOQUOTA(inode))3374 return;3375 3376 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */3377 if (to > i_size && !f2fs_verity_in_progress(inode)) {3378 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);3379 filemap_invalidate_lock(inode->i_mapping);3380 3381 truncate_pagecache(inode, i_size);3382 f2fs_truncate_blocks(inode, i_size, true);3383 3384 filemap_invalidate_unlock(inode->i_mapping);3385 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);3386 }3387}3388 3389static int prepare_write_begin(struct f2fs_sb_info *sbi,3390 struct folio *folio, loff_t pos, unsigned int len,3391 block_t *blk_addr, bool *node_changed)3392{3393 struct inode *inode = folio->mapping->host;3394 pgoff_t index = folio->index;3395 struct dnode_of_data dn;3396 struct page *ipage;3397 bool locked = false;3398 int flag = F2FS_GET_BLOCK_PRE_AIO;3399 int err = 0;3400 3401 /*3402 * If a whole page is being written and we already preallocated all the3403 * blocks, then there is no need to get a block address now.3404 */3405 if (len == PAGE_SIZE && is_inode_flag_set(inode, FI_PREALLOCATED_ALL))3406 return 0;3407 3408 /* f2fs_lock_op avoids race between write CP and convert_inline_page */3409 if (f2fs_has_inline_data(inode)) {3410 if (pos + len > MAX_INLINE_DATA(inode))3411 flag = F2FS_GET_BLOCK_DEFAULT;3412 f2fs_map_lock(sbi, flag);3413 locked = true;3414 } else if ((pos & PAGE_MASK) >= i_size_read(inode)) {3415 f2fs_map_lock(sbi, flag);3416 locked = true;3417 }3418 3419restart:3420 /* check inline_data */3421 ipage = f2fs_get_node_page(sbi, inode->i_ino);3422 if (IS_ERR(ipage)) {3423 err = PTR_ERR(ipage);3424 goto unlock_out;3425 }3426 3427 set_new_dnode(&dn, inode, ipage, ipage, 0);3428 3429 if (f2fs_has_inline_data(inode)) {3430 if (pos + len <= MAX_INLINE_DATA(inode)) {3431 f2fs_do_read_inline_data(folio, ipage);3432 set_inode_flag(inode, FI_DATA_EXIST);3433 if (inode->i_nlink)3434 set_page_private_inline(ipage);3435 goto out;3436 }3437 err = f2fs_convert_inline_page(&dn, folio_page(folio, 0));3438 if (err || dn.data_blkaddr != NULL_ADDR)3439 goto out;3440 }3441 3442 if (!f2fs_lookup_read_extent_cache_block(inode, index,3443 &dn.data_blkaddr)) {3444 if (locked) {3445 err = f2fs_reserve_block(&dn, index);3446 goto out;3447 }3448 3449 /* hole case */3450 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);3451 if (!err && dn.data_blkaddr != NULL_ADDR)3452 goto out;3453 f2fs_put_dnode(&dn);3454 f2fs_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO);3455 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);3456 locked = true;3457 goto restart;3458 }3459out:3460 if (!err) {3461 /* convert_inline_page can make node_changed */3462 *blk_addr = dn.data_blkaddr;3463 *node_changed = dn.node_changed;3464 }3465 f2fs_put_dnode(&dn);3466unlock_out:3467 if (locked)3468 f2fs_map_unlock(sbi, flag);3469 return err;3470}3471 3472static int __find_data_block(struct inode *inode, pgoff_t index,3473 block_t *blk_addr)3474{3475 struct dnode_of_data dn;3476 struct page *ipage;3477 int err = 0;3478 3479 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);3480 if (IS_ERR(ipage))3481 return PTR_ERR(ipage);3482 3483 set_new_dnode(&dn, inode, ipage, ipage, 0);3484 3485 if (!f2fs_lookup_read_extent_cache_block(inode, index,3486 &dn.data_blkaddr)) {3487 /* hole case */3488 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);3489 if (err) {3490 dn.data_blkaddr = NULL_ADDR;3491 err = 0;3492 }3493 }3494 *blk_addr = dn.data_blkaddr;3495 f2fs_put_dnode(&dn);3496 return err;3497}3498 3499static int __reserve_data_block(struct inode *inode, pgoff_t index,3500 block_t *blk_addr, bool *node_changed)3501{3502 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3503 struct dnode_of_data dn;3504 struct page *ipage;3505 int err = 0;3506 3507 f2fs_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO);3508 3509 ipage = f2fs_get_node_page(sbi, inode->i_ino);3510 if (IS_ERR(ipage)) {3511 err = PTR_ERR(ipage);3512 goto unlock_out;3513 }3514 set_new_dnode(&dn, inode, ipage, ipage, 0);3515 3516 if (!f2fs_lookup_read_extent_cache_block(dn.inode, index,3517 &dn.data_blkaddr))3518 err = f2fs_reserve_block(&dn, index);3519 3520 *blk_addr = dn.data_blkaddr;3521 *node_changed = dn.node_changed;3522 f2fs_put_dnode(&dn);3523 3524unlock_out:3525 f2fs_map_unlock(sbi, F2FS_GET_BLOCK_PRE_AIO);3526 return err;3527}3528 3529static int prepare_atomic_write_begin(struct f2fs_sb_info *sbi,3530 struct folio *folio, loff_t pos, unsigned int len,3531 block_t *blk_addr, bool *node_changed, bool *use_cow)3532{3533 struct inode *inode = folio->mapping->host;3534 struct inode *cow_inode = F2FS_I(inode)->cow_inode;3535 pgoff_t index = folio->index;3536 int err = 0;3537 block_t ori_blk_addr = NULL_ADDR;3538 3539 /* If pos is beyond the end of file, reserve a new block in COW inode */3540 if ((pos & PAGE_MASK) >= i_size_read(inode))3541 goto reserve_block;3542 3543 /* Look for the block in COW inode first */3544 err = __find_data_block(cow_inode, index, blk_addr);3545 if (err) {3546 return err;3547 } else if (*blk_addr != NULL_ADDR) {3548 *use_cow = true;3549 return 0;3550 }3551 3552 if (is_inode_flag_set(inode, FI_ATOMIC_REPLACE))3553 goto reserve_block;3554 3555 /* Look for the block in the original inode */3556 err = __find_data_block(inode, index, &ori_blk_addr);3557 if (err)3558 return err;3559 3560reserve_block:3561 /* Finally, we should reserve a new block in COW inode for the update */3562 err = __reserve_data_block(cow_inode, index, blk_addr, node_changed);3563 if (err)3564 return err;3565 inc_atomic_write_cnt(inode);3566 3567 if (ori_blk_addr != NULL_ADDR)3568 *blk_addr = ori_blk_addr;3569 return 0;3570}3571 3572static int f2fs_write_begin(struct file *file, struct address_space *mapping,3573 loff_t pos, unsigned len, struct folio **foliop, void **fsdata)3574{3575 struct inode *inode = mapping->host;3576 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3577 struct folio *folio;3578 pgoff_t index = pos >> PAGE_SHIFT;3579 bool need_balance = false;3580 bool use_cow = false;3581 block_t blkaddr = NULL_ADDR;3582 int err = 0;3583 3584 trace_f2fs_write_begin(inode, pos, len);3585 3586 if (!f2fs_is_checkpoint_ready(sbi)) {3587 err = -ENOSPC;3588 goto fail;3589 }3590 3591 /*3592 * We should check this at this moment to avoid deadlock on inode page3593 * and #0 page. The locking rule for inline_data conversion should be:3594 * folio_lock(folio #0) -> folio_lock(inode_page)3595 */3596 if (index != 0) {3597 err = f2fs_convert_inline_inode(inode);3598 if (err)3599 goto fail;3600 }3601 3602#ifdef CONFIG_F2FS_FS_COMPRESSION3603 if (f2fs_compressed_file(inode)) {3604 int ret;3605 struct page *page;3606 3607 *fsdata = NULL;3608 3609 if (len == PAGE_SIZE && !(f2fs_is_atomic_file(inode)))3610 goto repeat;3611 3612 ret = f2fs_prepare_compress_overwrite(inode, &page,3613 index, fsdata);3614 if (ret < 0) {3615 err = ret;3616 goto fail;3617 } else if (ret) {3618 *foliop = page_folio(page);3619 return 0;3620 }3621 }3622#endif3623 3624repeat:3625 /*3626 * Do not use FGP_STABLE to avoid deadlock.3627 * Will wait that below with our IO control.3628 */3629 folio = __filemap_get_folio(mapping, index,3630 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);3631 if (IS_ERR(folio)) {3632 err = PTR_ERR(folio);3633 goto fail;3634 }3635 3636 /* TODO: cluster can be compressed due to race with .writepage */3637 3638 *foliop = folio;3639 3640 if (f2fs_is_atomic_file(inode))3641 err = prepare_atomic_write_begin(sbi, folio, pos, len,3642 &blkaddr, &need_balance, &use_cow);3643 else3644 err = prepare_write_begin(sbi, folio, pos, len,3645 &blkaddr, &need_balance);3646 if (err)3647 goto put_folio;3648 3649 if (need_balance && !IS_NOQUOTA(inode) &&3650 has_not_enough_free_secs(sbi, 0, 0)) {3651 folio_unlock(folio);3652 f2fs_balance_fs(sbi, true);3653 folio_lock(folio);3654 if (folio->mapping != mapping) {3655 /* The folio got truncated from under us */3656 folio_unlock(folio);3657 folio_put(folio);3658 goto repeat;3659 }3660 }3661 3662 f2fs_wait_on_page_writeback(&folio->page, DATA, false, true);3663 3664 if (len == folio_size(folio) || folio_test_uptodate(folio))3665 return 0;3666 3667 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&3668 !f2fs_verity_in_progress(inode)) {3669 folio_zero_segment(folio, len, folio_size(folio));3670 return 0;3671 }3672 3673 if (blkaddr == NEW_ADDR) {3674 folio_zero_segment(folio, 0, folio_size(folio));3675 folio_mark_uptodate(folio);3676 } else {3677 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,3678 DATA_GENERIC_ENHANCE_READ)) {3679 err = -EFSCORRUPTED;3680 goto put_folio;3681 }3682 err = f2fs_submit_page_read(use_cow ?3683 F2FS_I(inode)->cow_inode : inode,3684 folio, blkaddr, 0, true);3685 if (err)3686 goto put_folio;3687 3688 folio_lock(folio);3689 if (unlikely(folio->mapping != mapping)) {3690 folio_unlock(folio);3691 folio_put(folio);3692 goto repeat;3693 }3694 if (unlikely(!folio_test_uptodate(folio))) {3695 err = -EIO;3696 goto put_folio;3697 }3698 }3699 return 0;3700 3701put_folio:3702 folio_unlock(folio);3703 folio_put(folio);3704fail:3705 f2fs_write_failed(inode, pos + len);3706 return err;3707}3708 3709static int f2fs_write_end(struct file *file,3710 struct address_space *mapping,3711 loff_t pos, unsigned len, unsigned copied,3712 struct folio *folio, void *fsdata)3713{3714 struct inode *inode = folio->mapping->host;3715 3716 trace_f2fs_write_end(inode, pos, len, copied);3717 3718 /*3719 * This should be come from len == PAGE_SIZE, and we expect copied3720 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and3721 * let generic_perform_write() try to copy data again through copied=0.3722 */3723 if (!folio_test_uptodate(folio)) {3724 if (unlikely(copied != len))3725 copied = 0;3726 else3727 folio_mark_uptodate(folio);3728 }3729 3730#ifdef CONFIG_F2FS_FS_COMPRESSION3731 /* overwrite compressed file */3732 if (f2fs_compressed_file(inode) && fsdata) {3733 f2fs_compress_write_end(inode, fsdata, folio->index, copied);3734 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);3735 3736 if (pos + copied > i_size_read(inode) &&3737 !f2fs_verity_in_progress(inode))3738 f2fs_i_size_write(inode, pos + copied);3739 return copied;3740 }3741#endif3742 3743 if (!copied)3744 goto unlock_out;3745 3746 folio_mark_dirty(folio);3747 3748 if (f2fs_is_atomic_file(inode))3749 set_page_private_atomic(folio_page(folio, 0));3750 3751 if (pos + copied > i_size_read(inode) &&3752 !f2fs_verity_in_progress(inode)) {3753 f2fs_i_size_write(inode, pos + copied);3754 if (f2fs_is_atomic_file(inode))3755 f2fs_i_size_write(F2FS_I(inode)->cow_inode,3756 pos + copied);3757 }3758unlock_out:3759 folio_unlock(folio);3760 folio_put(folio);3761 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);3762 return copied;3763}3764 3765void f2fs_invalidate_folio(struct folio *folio, size_t offset, size_t length)3766{3767 struct inode *inode = folio->mapping->host;3768 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3769 3770 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&3771 (offset || length != folio_size(folio)))3772 return;3773 3774 if (folio_test_dirty(folio)) {3775 if (inode->i_ino == F2FS_META_INO(sbi)) {3776 dec_page_count(sbi, F2FS_DIRTY_META);3777 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {3778 dec_page_count(sbi, F2FS_DIRTY_NODES);3779 } else {3780 inode_dec_dirty_pages(inode);3781 f2fs_remove_dirty_inode(inode);3782 }3783 }3784 clear_page_private_all(&folio->page);3785}3786 3787bool f2fs_release_folio(struct folio *folio, gfp_t wait)3788{3789 /* If this is dirty folio, keep private data */3790 if (folio_test_dirty(folio))3791 return false;3792 3793 clear_page_private_all(&folio->page);3794 return true;3795}3796 3797static bool f2fs_dirty_data_folio(struct address_space *mapping,3798 struct folio *folio)3799{3800 struct inode *inode = mapping->host;3801 3802 trace_f2fs_set_page_dirty(folio, DATA);3803 3804 if (!folio_test_uptodate(folio))3805 folio_mark_uptodate(folio);3806 BUG_ON(folio_test_swapcache(folio));3807 3808 if (filemap_dirty_folio(mapping, folio)) {3809 f2fs_update_dirty_folio(inode, folio);3810 return true;3811 }3812 return false;3813}3814 3815 3816static sector_t f2fs_bmap_compress(struct inode *inode, sector_t block)3817{3818#ifdef CONFIG_F2FS_FS_COMPRESSION3819 struct dnode_of_data dn;3820 sector_t start_idx, blknr = 0;3821 int ret;3822 3823 start_idx = round_down(block, F2FS_I(inode)->i_cluster_size);3824 3825 set_new_dnode(&dn, inode, NULL, NULL, 0);3826 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);3827 if (ret)3828 return 0;3829 3830 if (dn.data_blkaddr != COMPRESS_ADDR) {3831 dn.ofs_in_node += block - start_idx;3832 blknr = f2fs_data_blkaddr(&dn);3833 if (!__is_valid_data_blkaddr(blknr))3834 blknr = 0;3835 }3836 3837 f2fs_put_dnode(&dn);3838 return blknr;3839#else3840 return 0;3841#endif3842}3843 3844 3845static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)3846{3847 struct inode *inode = mapping->host;3848 sector_t blknr = 0;3849 3850 if (f2fs_has_inline_data(inode))3851 goto out;3852 3853 /* make sure allocating whole blocks */3854 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))3855 filemap_write_and_wait(mapping);3856 3857 /* Block number less than F2FS MAX BLOCKS */3858 if (unlikely(block >= max_file_blocks(inode)))3859 goto out;3860 3861 if (f2fs_compressed_file(inode)) {3862 blknr = f2fs_bmap_compress(inode, block);3863 } else {3864 struct f2fs_map_blocks map;3865 3866 memset(&map, 0, sizeof(map));3867 map.m_lblk = block;3868 map.m_len = 1;3869 map.m_next_pgofs = NULL;3870 map.m_seg_type = NO_CHECK_TYPE;3871 3872 if (!f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_BMAP))3873 blknr = map.m_pblk;3874 }3875out:3876 trace_f2fs_bmap(inode, block, blknr);3877 return blknr;3878}3879 3880#ifdef CONFIG_SWAP3881static int f2fs_migrate_blocks(struct inode *inode, block_t start_blk,3882 unsigned int blkcnt)3883{3884 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3885 unsigned int blkofs;3886 unsigned int blk_per_sec = BLKS_PER_SEC(sbi);3887 unsigned int end_blk = start_blk + blkcnt - 1;3888 unsigned int secidx = start_blk / blk_per_sec;3889 unsigned int end_sec;3890 int ret = 0;3891 3892 if (!blkcnt)3893 return 0;3894 end_sec = end_blk / blk_per_sec;3895 3896 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);3897 filemap_invalidate_lock(inode->i_mapping);3898 3899 set_inode_flag(inode, FI_ALIGNED_WRITE);3900 set_inode_flag(inode, FI_OPU_WRITE);3901 3902 for (; secidx <= end_sec; secidx++) {3903 unsigned int blkofs_end = secidx == end_sec ?3904 end_blk % blk_per_sec : blk_per_sec - 1;3905 3906 f2fs_down_write(&sbi->pin_sem);3907 3908 ret = f2fs_allocate_pinning_section(sbi);3909 if (ret) {3910 f2fs_up_write(&sbi->pin_sem);3911 break;3912 }3913 3914 set_inode_flag(inode, FI_SKIP_WRITES);3915 3916 for (blkofs = 0; blkofs <= blkofs_end; blkofs++) {3917 struct page *page;3918 unsigned int blkidx = secidx * blk_per_sec + blkofs;3919 3920 page = f2fs_get_lock_data_page(inode, blkidx, true);3921 if (IS_ERR(page)) {3922 f2fs_up_write(&sbi->pin_sem);3923 ret = PTR_ERR(page);3924 goto done;3925 }3926 3927 set_page_dirty(page);3928 f2fs_put_page(page, 1);3929 }3930 3931 clear_inode_flag(inode, FI_SKIP_WRITES);3932 3933 ret = filemap_fdatawrite(inode->i_mapping);3934 3935 f2fs_up_write(&sbi->pin_sem);3936 3937 if (ret)3938 break;3939 }3940 3941done:3942 clear_inode_flag(inode, FI_SKIP_WRITES);3943 clear_inode_flag(inode, FI_OPU_WRITE);3944 clear_inode_flag(inode, FI_ALIGNED_WRITE);3945 3946 filemap_invalidate_unlock(inode->i_mapping);3947 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);3948 3949 return ret;3950}3951 3952static int check_swap_activate(struct swap_info_struct *sis,3953 struct file *swap_file, sector_t *span)3954{3955 struct address_space *mapping = swap_file->f_mapping;3956 struct inode *inode = mapping->host;3957 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3958 block_t cur_lblock;3959 block_t last_lblock;3960 block_t pblock;3961 block_t lowest_pblock = -1;3962 block_t highest_pblock = 0;3963 int nr_extents = 0;3964 unsigned int nr_pblocks;3965 unsigned int blks_per_sec = BLKS_PER_SEC(sbi);3966 unsigned int not_aligned = 0;3967 int ret = 0;3968 3969 /*3970 * Map all the blocks into the extent list. This code doesn't try3971 * to be very smart.3972 */3973 cur_lblock = 0;3974 last_lblock = bytes_to_blks(inode, i_size_read(inode));3975 3976 while (cur_lblock < last_lblock && cur_lblock < sis->max) {3977 struct f2fs_map_blocks map;3978retry:3979 cond_resched();3980 3981 memset(&map, 0, sizeof(map));3982 map.m_lblk = cur_lblock;3983 map.m_len = last_lblock - cur_lblock;3984 map.m_next_pgofs = NULL;3985 map.m_next_extent = NULL;3986 map.m_seg_type = NO_CHECK_TYPE;3987 map.m_may_create = false;3988 3989 ret = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_FIEMAP);3990 if (ret)3991 goto out;3992 3993 /* hole */3994 if (!(map.m_flags & F2FS_MAP_FLAGS)) {3995 f2fs_err(sbi, "Swapfile has holes");3996 ret = -EINVAL;3997 goto out;3998 }3999 4000 pblock = map.m_pblk;4001 nr_pblocks = map.m_len;4002 4003 if ((pblock - SM_I(sbi)->main_blkaddr) % blks_per_sec ||4004 nr_pblocks % blks_per_sec ||4005 !f2fs_valid_pinned_area(sbi, pblock)) {4006 bool last_extent = false;4007 4008 not_aligned++;4009 4010 nr_pblocks = roundup(nr_pblocks, blks_per_sec);4011 if (cur_lblock + nr_pblocks > sis->max)4012 nr_pblocks -= blks_per_sec;4013 4014 /* this extent is last one */4015 if (!nr_pblocks) {4016 nr_pblocks = last_lblock - cur_lblock;4017 last_extent = true;4018 }4019 4020 ret = f2fs_migrate_blocks(inode, cur_lblock,4021 nr_pblocks);4022 if (ret) {4023 if (ret == -ENOENT)4024 ret = -EINVAL;4025 goto out;4026 }4027 4028 if (!last_extent)4029 goto retry;4030 }4031 4032 if (cur_lblock + nr_pblocks >= sis->max)4033 nr_pblocks = sis->max - cur_lblock;4034 4035 if (cur_lblock) { /* exclude the header page */4036 if (pblock < lowest_pblock)4037 lowest_pblock = pblock;4038 if (pblock + nr_pblocks - 1 > highest_pblock)4039 highest_pblock = pblock + nr_pblocks - 1;4040 }4041 4042 /*4043 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks4044 */4045 ret = add_swap_extent(sis, cur_lblock, nr_pblocks, pblock);4046 if (ret < 0)4047 goto out;4048 nr_extents += ret;4049 cur_lblock += nr_pblocks;4050 }4051 ret = nr_extents;4052 *span = 1 + highest_pblock - lowest_pblock;4053 if (cur_lblock == 0)4054 cur_lblock = 1; /* force Empty message */4055 sis->max = cur_lblock;4056 sis->pages = cur_lblock - 1;4057 sis->highest_bit = cur_lblock - 1;4058out:4059 if (not_aligned)4060 f2fs_warn(sbi, "Swapfile (%u) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(%lu * N)",4061 not_aligned, blks_per_sec * F2FS_BLKSIZE);4062 return ret;4063}4064 4065static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,4066 sector_t *span)4067{4068 struct inode *inode = file_inode(file);4069 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);4070 int ret;4071 4072 if (!S_ISREG(inode->i_mode))4073 return -EINVAL;4074 4075 if (f2fs_readonly(sbi->sb))4076 return -EROFS;4077 4078 if (f2fs_lfs_mode(sbi) && !f2fs_sb_has_blkzoned(sbi)) {4079 f2fs_err(sbi, "Swapfile not supported in LFS mode");4080 return -EINVAL;4081 }4082 4083 ret = f2fs_convert_inline_inode(inode);4084 if (ret)4085 return ret;4086 4087 if (!f2fs_disable_compressed_file(inode))4088 return -EINVAL;4089 4090 ret = filemap_fdatawrite(inode->i_mapping);4091 if (ret < 0)4092 return ret;4093 4094 f2fs_precache_extents(inode);4095 4096 ret = check_swap_activate(sis, file, span);4097 if (ret < 0)4098 return ret;4099 4100 stat_inc_swapfile_inode(inode);4101 set_inode_flag(inode, FI_PIN_FILE);4102 f2fs_update_time(sbi, REQ_TIME);4103 return ret;4104}4105 4106static void f2fs_swap_deactivate(struct file *file)4107{4108 struct inode *inode = file_inode(file);4109 4110 stat_dec_swapfile_inode(inode);4111 clear_inode_flag(inode, FI_PIN_FILE);4112}4113#else4114static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,4115 sector_t *span)4116{4117 return -EOPNOTSUPP;4118}4119 4120static void f2fs_swap_deactivate(struct file *file)4121{4122}4123#endif4124 4125const struct address_space_operations f2fs_dblock_aops = {4126 .read_folio = f2fs_read_data_folio,4127 .readahead = f2fs_readahead,4128 .writepage = f2fs_write_data_page,4129 .writepages = f2fs_write_data_pages,4130 .write_begin = f2fs_write_begin,4131 .write_end = f2fs_write_end,4132 .dirty_folio = f2fs_dirty_data_folio,4133 .migrate_folio = filemap_migrate_folio,4134 .invalidate_folio = f2fs_invalidate_folio,4135 .release_folio = f2fs_release_folio,4136 .bmap = f2fs_bmap,4137 .swap_activate = f2fs_swap_activate,4138 .swap_deactivate = f2fs_swap_deactivate,4139};4140 4141void f2fs_clear_page_cache_dirty_tag(struct folio *folio)4142{4143 struct address_space *mapping = folio->mapping;4144 unsigned long flags;4145 4146 xa_lock_irqsave(&mapping->i_pages, flags);4147 __xa_clear_mark(&mapping->i_pages, folio->index,4148 PAGECACHE_TAG_DIRTY);4149 xa_unlock_irqrestore(&mapping->i_pages, flags);4150}4151 4152int __init f2fs_init_post_read_processing(void)4153{4154 bio_post_read_ctx_cache =4155 kmem_cache_create("f2fs_bio_post_read_ctx",4156 sizeof(struct bio_post_read_ctx), 0, 0, NULL);4157 if (!bio_post_read_ctx_cache)4158 goto fail;4159 bio_post_read_ctx_pool =4160 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,4161 bio_post_read_ctx_cache);4162 if (!bio_post_read_ctx_pool)4163 goto fail_free_cache;4164 return 0;4165 4166fail_free_cache:4167 kmem_cache_destroy(bio_post_read_ctx_cache);4168fail:4169 return -ENOMEM;4170}4171 4172void f2fs_destroy_post_read_processing(void)4173{4174 mempool_destroy(bio_post_read_ctx_pool);4175 kmem_cache_destroy(bio_post_read_ctx_cache);4176}4177 4178int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)4179{4180 if (!f2fs_sb_has_encrypt(sbi) &&4181 !f2fs_sb_has_verity(sbi) &&4182 !f2fs_sb_has_compression(sbi))4183 return 0;4184 4185 sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",4186 WQ_UNBOUND | WQ_HIGHPRI,4187 num_online_cpus());4188 return sbi->post_read_wq ? 0 : -ENOMEM;4189}4190 4191void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)4192{4193 if (sbi->post_read_wq)4194 destroy_workqueue(sbi->post_read_wq);4195}4196 4197int __init f2fs_init_bio_entry_cache(void)4198{4199 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",4200 sizeof(struct bio_entry));4201 return bio_entry_slab ? 0 : -ENOMEM;4202}4203 4204void f2fs_destroy_bio_entry_cache(void)4205{4206 kmem_cache_destroy(bio_entry_slab);4207}4208 4209static int f2fs_iomap_begin(struct inode *inode, loff_t offset, loff_t length,4210 unsigned int flags, struct iomap *iomap,4211 struct iomap *srcmap)4212{4213 struct f2fs_map_blocks map = {};4214 pgoff_t next_pgofs = 0;4215 int err;4216 4217 map.m_lblk = bytes_to_blks(inode, offset);4218 map.m_len = bytes_to_blks(inode, offset + length - 1) - map.m_lblk + 1;4219 map.m_next_pgofs = &next_pgofs;4220 map.m_seg_type = f2fs_rw_hint_to_seg_type(F2FS_I_SB(inode),4221 inode->i_write_hint);4222 if (flags & IOMAP_WRITE)4223 map.m_may_create = true;4224 4225 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DIO);4226 if (err)4227 return err;4228 4229 iomap->offset = blks_to_bytes(inode, map.m_lblk);4230 4231 /*4232 * When inline encryption is enabled, sometimes I/O to an encrypted file4233 * has to be broken up to guarantee DUN contiguity. Handle this by4234 * limiting the length of the mapping returned.4235 */4236 map.m_len = fscrypt_limit_io_blocks(inode, map.m_lblk, map.m_len);4237 4238 /*4239 * We should never see delalloc or compressed extents here based on4240 * prior flushing and checks.4241 */4242 if (WARN_ON_ONCE(map.m_pblk == COMPRESS_ADDR))4243 return -EINVAL;4244 4245 if (map.m_flags & F2FS_MAP_MAPPED) {4246 if (WARN_ON_ONCE(map.m_pblk == NEW_ADDR))4247 return -EINVAL;4248 4249 iomap->length = blks_to_bytes(inode, map.m_len);4250 iomap->type = IOMAP_MAPPED;4251 iomap->flags |= IOMAP_F_MERGED;4252 iomap->bdev = map.m_bdev;4253 iomap->addr = blks_to_bytes(inode, map.m_pblk);4254 } else {4255 if (flags & IOMAP_WRITE)4256 return -ENOTBLK;4257 4258 if (map.m_pblk == NULL_ADDR) {4259 iomap->length = blks_to_bytes(inode, next_pgofs) -4260 iomap->offset;4261 iomap->type = IOMAP_HOLE;4262 } else if (map.m_pblk == NEW_ADDR) {4263 iomap->length = blks_to_bytes(inode, map.m_len);4264 iomap->type = IOMAP_UNWRITTEN;4265 } else {4266 f2fs_bug_on(F2FS_I_SB(inode), 1);4267 }4268 iomap->addr = IOMAP_NULL_ADDR;4269 }4270 4271 if (map.m_flags & F2FS_MAP_NEW)4272 iomap->flags |= IOMAP_F_NEW;4273 if ((inode->i_state & I_DIRTY_DATASYNC) ||4274 offset + length > i_size_read(inode))4275 iomap->flags |= IOMAP_F_DIRTY;4276 4277 return 0;4278}4279 4280const struct iomap_ops f2fs_iomap_ops = {4281 .iomap_begin = f2fs_iomap_begin,4282};4283