ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/fs/f2fs/data.c b/marvell/linux/fs/f2fs/data.c
new file mode 100644
index 0000000..a27d6fa
--- /dev/null
+++ b/marvell/linux/fs/f2fs/data.c
@@ -0,0 +1,4274 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/f2fs/data.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/buffer_head.h>
+#include <linux/mpage.h>
+#include <linux/writeback.h>
+#include <linux/backing-dev.h>
+#include <linux/pagevec.h>
+#include <linux/blkdev.h>
+#include <linux/bio.h>
+#include <linux/blk-crypto.h>
+#include <linux/swap.h>
+#include <linux/prefetch.h>
+#include <linux/uio.h>
+#include <linux/cleancache.h>
+#include <linux/sched/signal.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+#include <trace/events/f2fs.h>
+#include <trace/events/android_fs.h>
+
+#define NUM_PREALLOC_POST_READ_CTXS 128
+
+static struct kmem_cache *bio_post_read_ctx_cache;
+static struct kmem_cache *bio_entry_slab;
+static mempool_t *bio_post_read_ctx_pool;
+static struct bio_set f2fs_bioset;
+
+#define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE
+
+int __init f2fs_init_bioset(void)
+{
+ if (bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE,
+ 0, BIOSET_NEED_BVECS))
+ return -ENOMEM;
+ return 0;
+}
+
+void f2fs_destroy_bioset(void)
+{
+ bioset_exit(&f2fs_bioset);
+}
+
+static bool __is_cp_guaranteed(struct page *page)
+{
+ struct address_space *mapping = page->mapping;
+ struct inode *inode;
+ struct f2fs_sb_info *sbi;
+
+ if (!mapping)
+ return false;
+
+ inode = mapping->host;
+ sbi = F2FS_I_SB(inode);
+
+ if (inode->i_ino == F2FS_META_INO(sbi) ||
+ inode->i_ino == F2FS_NODE_INO(sbi) ||
+ S_ISDIR(inode->i_mode))
+ return true;
+
+ if (f2fs_is_compressed_page(page))
+ return false;
+ if ((S_ISREG(inode->i_mode) &&
+ (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
+ page_private_gcing(page))
+ return true;
+ return false;
+}
+
+static enum count_type __read_io_type(struct page *page)
+{
+ struct address_space *mapping = page_file_mapping(page);
+
+ if (mapping) {
+ struct inode *inode = mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ if (inode->i_ino == F2FS_META_INO(sbi))
+ return F2FS_RD_META;
+
+ if (inode->i_ino == F2FS_NODE_INO(sbi))
+ return F2FS_RD_NODE;
+ }
+ return F2FS_RD_DATA;
+}
+
+/* postprocessing steps for read bios */
+enum bio_post_read_step {
+#ifdef CONFIG_FS_ENCRYPTION
+ STEP_DECRYPT = 1 << 0,
+#else
+ STEP_DECRYPT = 0, /* compile out the decryption-related code */
+#endif
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ STEP_DECOMPRESS = 1 << 1,
+#else
+ STEP_DECOMPRESS = 0, /* compile out the decompression-related code */
+#endif
+#ifdef CONFIG_FS_VERITY
+ STEP_VERITY = 1 << 2,
+#else
+ STEP_VERITY = 0, /* compile out the verity-related code */
+#endif
+};
+
+struct bio_post_read_ctx {
+ struct bio *bio;
+ struct f2fs_sb_info *sbi;
+ struct work_struct work;
+ unsigned int enabled_steps;
+};
+
+static void f2fs_finish_read_bio(struct bio *bio)
+{
+ struct bio_vec *bv;
+ struct bvec_iter_all iter_all;
+
+ /*
+ * Update and unlock the bio's pagecache pages, and put the
+ * decompression context for any compressed pages.
+ */
+ bio_for_each_segment_all(bv, bio, iter_all) {
+ struct page *page = bv->bv_page;
+
+ if (f2fs_is_compressed_page(page)) {
+ if (bio->bi_status)
+ f2fs_end_read_compressed_page(page, true, 0);
+ f2fs_put_page_dic(page);
+ continue;
+ }
+
+ /* PG_error was set if decryption or verity failed. */
+ if (bio->bi_status || PageError(page)) {
+ ClearPageUptodate(page);
+ /* will re-read again later */
+ ClearPageError(page);
+ } else {
+ SetPageUptodate(page);
+ }
+ dec_page_count(F2FS_P_SB(page), __read_io_type(page));
+ unlock_page(page);
+ }
+
+ if (bio->bi_private)
+ mempool_free(bio->bi_private, bio_post_read_ctx_pool);
+ bio_put(bio);
+}
+
+static void f2fs_verify_bio(struct work_struct *work)
+{
+ struct bio_post_read_ctx *ctx =
+ container_of(work, struct bio_post_read_ctx, work);
+ struct bio *bio = ctx->bio;
+ bool may_have_compressed_pages = (ctx->enabled_steps & STEP_DECOMPRESS);
+
+ /*
+ * fsverity_verify_bio() may call readpages() again, and while verity
+ * will be disabled for this, decryption and/or decompression may still
+ * be needed, resulting in another bio_post_read_ctx being allocated.
+ * So to prevent deadlocks we need to release the current ctx to the
+ * mempool first. This assumes that verity is the last post-read step.
+ */
+ mempool_free(ctx, bio_post_read_ctx_pool);
+ bio->bi_private = NULL;
+
+ /*
+ * Verify the bio's pages with fs-verity. Exclude compressed pages,
+ * as those were handled separately by f2fs_end_read_compressed_page().
+ */
+ if (may_have_compressed_pages) {
+ struct bio_vec *bv;
+ struct bvec_iter_all iter_all;
+
+ bio_for_each_segment_all(bv, bio, iter_all) {
+ struct page *page = bv->bv_page;
+
+ if (!f2fs_is_compressed_page(page) &&
+ !PageError(page) && !fsverity_verify_page(page))
+ SetPageError(page);
+ }
+ } else {
+ fsverity_verify_bio(bio);
+ }
+
+ f2fs_finish_read_bio(bio);
+}
+
+/*
+ * If the bio's data needs to be verified with fs-verity, then enqueue the
+ * verity work for the bio. Otherwise finish the bio now.
+ *
+ * Note that to avoid deadlocks, the verity work can't be done on the
+ * decryption/decompression workqueue. This is because verifying the data pages
+ * can involve reading verity metadata pages from the file, and these verity
+ * metadata pages may be encrypted and/or compressed.
+ */
+static void f2fs_verify_and_finish_bio(struct bio *bio)
+{
+ struct bio_post_read_ctx *ctx = bio->bi_private;
+
+ if (ctx && (ctx->enabled_steps & STEP_VERITY)) {
+ INIT_WORK(&ctx->work, f2fs_verify_bio);
+ fsverity_enqueue_verify_work(&ctx->work);
+ } else {
+ f2fs_finish_read_bio(bio);
+ }
+}
+
+/*
+ * Handle STEP_DECOMPRESS by decompressing any compressed clusters whose last
+ * remaining page was read by @ctx->bio.
+ *
+ * Note that a bio may span clusters (even a mix of compressed and uncompressed
+ * clusters) or be for just part of a cluster. STEP_DECOMPRESS just indicates
+ * that the bio includes at least one compressed page. The actual decompression
+ * is done on a per-cluster basis, not a per-bio basis.
+ */
+static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx)
+{
+ struct bio_vec *bv;
+ struct bvec_iter_all iter_all;
+ bool all_compressed = true;
+ block_t blkaddr = SECTOR_TO_BLOCK(ctx->bio->bi_iter.bi_sector);
+
+ bio_for_each_segment_all(bv, ctx->bio, iter_all) {
+ struct page *page = bv->bv_page;
+
+ /* PG_error was set if decryption failed. */
+ if (f2fs_is_compressed_page(page))
+ f2fs_end_read_compressed_page(page, PageError(page),
+ blkaddr);
+ else
+ all_compressed = false;
+
+ blkaddr++;
+ }
+
+ /*
+ * Optimization: if all the bio's pages are compressed, then scheduling
+ * the per-bio verity work is unnecessary, as verity will be fully
+ * handled at the compression cluster level.
+ */
+ if (all_compressed)
+ ctx->enabled_steps &= ~STEP_VERITY;
+}
+
+static void f2fs_post_read_work(struct work_struct *work)
+{
+ struct bio_post_read_ctx *ctx =
+ container_of(work, struct bio_post_read_ctx, work);
+
+ if (ctx->enabled_steps & STEP_DECRYPT)
+ fscrypt_decrypt_bio(ctx->bio);
+
+ if (ctx->enabled_steps & STEP_DECOMPRESS)
+ f2fs_handle_step_decompress(ctx);
+
+ f2fs_verify_and_finish_bio(ctx->bio);
+}
+
+static void f2fs_read_end_io(struct bio *bio)
+{
+ struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
+ struct bio_post_read_ctx *ctx = bio->bi_private;
+
+ if (time_to_inject(sbi, FAULT_READ_IO)) {
+ f2fs_show_injection_info(sbi, FAULT_READ_IO);
+ bio->bi_status = BLK_STS_IOERR;
+ }
+
+ if (bio->bi_status) {
+ f2fs_finish_read_bio(bio);
+ return;
+ }
+
+ if (ctx && (ctx->enabled_steps & (STEP_DECRYPT | STEP_DECOMPRESS))) {
+ INIT_WORK(&ctx->work, f2fs_post_read_work);
+ queue_work(ctx->sbi->post_read_wq, &ctx->work);
+ } else {
+ f2fs_verify_and_finish_bio(bio);
+ }
+}
+
+static void f2fs_write_end_io(struct bio *bio)
+{
+ struct f2fs_sb_info *sbi = bio->bi_private;
+ struct bio_vec *bvec;
+ struct bvec_iter_all iter_all;
+
+ if (time_to_inject(sbi, FAULT_WRITE_IO)) {
+ f2fs_show_injection_info(sbi, FAULT_WRITE_IO);
+ bio->bi_status = BLK_STS_IOERR;
+ }
+
+ bio_for_each_segment_all(bvec, bio, iter_all) {
+ struct page *page = bvec->bv_page;
+ enum count_type type = WB_DATA_TYPE(page);
+
+ if (page_private_dummy(page)) {
+ clear_page_private_dummy(page);
+ unlock_page(page);
+ mempool_free(page, sbi->write_io_dummy);
+
+ if (unlikely(bio->bi_status))
+ f2fs_stop_checkpoint(sbi, true);
+ continue;
+ }
+
+ fscrypt_finalize_bounce_page(&page);
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ if (f2fs_is_compressed_page(page)) {
+ f2fs_compress_write_end_io(bio, page);
+ continue;
+ }
+#endif
+
+ if (unlikely(bio->bi_status)) {
+ mapping_set_error(page->mapping, -EIO);
+ if (type == F2FS_WB_CP_DATA)
+ f2fs_stop_checkpoint(sbi, true);
+ }
+
+ f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
+ page->index != nid_of_node(page));
+
+ dec_page_count(sbi, type);
+ if (f2fs_in_warm_node_list(sbi, page))
+ f2fs_del_fsync_node_entry(sbi, page);
+ clear_page_private_gcing(page);
+ end_page_writeback(page);
+ }
+ if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
+ wq_has_sleeper(&sbi->cp_wait))
+ wake_up(&sbi->cp_wait);
+
+ bio_put(bio);
+}
+
+struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
+ block_t blk_addr, struct bio *bio)
+{
+ struct block_device *bdev = sbi->sb->s_bdev;
+ int i;
+
+ if (f2fs_is_multi_device(sbi)) {
+ for (i = 0; i < sbi->s_ndevs; i++) {
+ if (FDEV(i).start_blk <= blk_addr &&
+ FDEV(i).end_blk >= blk_addr) {
+ blk_addr -= FDEV(i).start_blk;
+ bdev = FDEV(i).bdev;
+ break;
+ }
+ }
+ }
+ if (bio) {
+ bio_set_dev(bio, bdev);
+ bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
+ }
+ return bdev;
+}
+
+int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
+{
+ int i;
+
+ if (!f2fs_is_multi_device(sbi))
+ return 0;
+
+ for (i = 0; i < sbi->s_ndevs; i++)
+ if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
+ return i;
+ return 0;
+}
+
+/*
+ * Return true, if pre_bio's bdev is same as its target device.
+ */
+static bool __same_bdev(struct f2fs_sb_info *sbi,
+ block_t blk_addr, struct bio *bio)
+{
+ struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
+ return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
+}
+
+static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
+{
+ struct f2fs_sb_info *sbi = fio->sbi;
+ struct bio *bio;
+
+ bio = bio_alloc_bioset(GFP_NOIO, npages, &f2fs_bioset);
+
+ f2fs_target_device(sbi, fio->new_blkaddr, bio);
+ if (is_read_io(fio->op)) {
+ bio->bi_end_io = f2fs_read_end_io;
+ bio->bi_private = NULL;
+ } else {
+ bio->bi_end_io = f2fs_write_end_io;
+ bio->bi_private = sbi;
+ bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
+ fio->type, fio->temp);
+ }
+ if (fio->io_wbc)
+ wbc_init_bio(fio->io_wbc, bio);
+
+ return bio;
+}
+
+static void f2fs_set_bio_crypt_ctx(struct bio *bio, const struct inode *inode,
+ pgoff_t first_idx,
+ const struct f2fs_io_info *fio,
+ gfp_t gfp_mask)
+{
+ /*
+ * The f2fs garbage collector sets ->encrypted_page when it wants to
+ * read/write raw data without encryption.
+ */
+ if (!fio || !fio->encrypted_page)
+ fscrypt_set_bio_crypt_ctx(bio, inode, first_idx, gfp_mask);
+ else if (fscrypt_inode_should_skip_dm_default_key(inode))
+ bio_set_skip_dm_default_key(bio);
+}
+
+static bool f2fs_crypt_mergeable_bio(struct bio *bio, const struct inode *inode,
+ pgoff_t next_idx,
+ const struct f2fs_io_info *fio)
+{
+ /*
+ * The f2fs garbage collector sets ->encrypted_page when it wants to
+ * read/write raw data without encryption.
+ */
+ if (fio && fio->encrypted_page)
+ return !bio_has_crypt_ctx(bio) &&
+ (bio_should_skip_dm_default_key(bio) ==
+ fscrypt_inode_should_skip_dm_default_key(inode));
+
+ return fscrypt_mergeable_bio(bio, inode, next_idx);
+}
+
+static inline void __submit_bio(struct f2fs_sb_info *sbi,
+ struct bio *bio, enum page_type type)
+{
+ if (!is_read_io(bio_op(bio))) {
+ unsigned int start;
+
+ if (type != DATA && type != NODE)
+ goto submit_io;
+
+ if (f2fs_lfs_mode(sbi) && current->plug)
+ blk_finish_plug(current->plug);
+
+ if (!F2FS_IO_ALIGNED(sbi))
+ goto submit_io;
+
+ start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
+ start %= F2FS_IO_SIZE(sbi);
+
+ if (start == 0)
+ goto submit_io;
+
+ /* fill dummy pages */
+ for (; start < F2FS_IO_SIZE(sbi); start++) {
+ struct page *page =
+ mempool_alloc(sbi->write_io_dummy,
+ GFP_NOIO | __GFP_NOFAIL);
+ f2fs_bug_on(sbi, !page);
+
+ lock_page(page);
+
+ zero_user_segment(page, 0, PAGE_SIZE);
+ set_page_private_dummy(page);
+
+ if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
+ f2fs_bug_on(sbi, 1);
+ }
+ /*
+ * In the NODE case, we lose next block address chain. So, we
+ * need to do checkpoint in f2fs_sync_file.
+ */
+ if (type == NODE)
+ set_sbi_flag(sbi, SBI_NEED_CP);
+ }
+submit_io:
+ if (is_read_io(bio_op(bio)))
+ trace_f2fs_submit_read_bio(sbi->sb, type, bio);
+ else
+ trace_f2fs_submit_write_bio(sbi->sb, type, bio);
+ submit_bio(bio);
+}
+
+void f2fs_submit_bio(struct f2fs_sb_info *sbi,
+ struct bio *bio, enum page_type type)
+{
+ __submit_bio(sbi, bio, type);
+}
+
+static void __attach_io_flag(struct f2fs_io_info *fio)
+{
+ struct f2fs_sb_info *sbi = fio->sbi;
+ unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1;
+ unsigned int io_flag, fua_flag, meta_flag;
+
+ if (fio->type == DATA)
+ io_flag = sbi->data_io_flag;
+ else if (fio->type == NODE)
+ io_flag = sbi->node_io_flag;
+ else
+ return;
+
+ fua_flag = io_flag & temp_mask;
+ meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask;
+
+ /*
+ * data/node io flag bits per temp:
+ * REQ_META | REQ_FUA |
+ * 5 | 4 | 3 | 2 | 1 | 0 |
+ * Cold | Warm | Hot | Cold | Warm | Hot |
+ */
+ if ((1 << fio->temp) & meta_flag)
+ fio->op_flags |= REQ_META;
+ if ((1 << fio->temp) & fua_flag)
+ fio->op_flags |= REQ_FUA;
+}
+
+static void __submit_merged_bio(struct f2fs_bio_info *io)
+{
+ struct f2fs_io_info *fio = &io->fio;
+
+ if (!io->bio)
+ return;
+
+ __attach_io_flag(fio);
+ bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
+
+ if (is_read_io(fio->op))
+ trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
+ else
+ trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
+
+ __submit_bio(io->sbi, io->bio, fio->type);
+ io->bio = NULL;
+}
+
+static bool __has_merged_page(struct bio *bio, struct inode *inode,
+ struct page *page, nid_t ino)
+{
+ struct bio_vec *bvec;
+ struct bvec_iter_all iter_all;
+
+ if (!bio)
+ return false;
+
+ if (!inode && !page && !ino)
+ return true;
+
+ bio_for_each_segment_all(bvec, bio, iter_all) {
+ struct page *target = bvec->bv_page;
+
+ if (fscrypt_is_bounce_page(target)) {
+ target = fscrypt_pagecache_page(target);
+ if (IS_ERR(target))
+ continue;
+ }
+ if (f2fs_is_compressed_page(target)) {
+ target = f2fs_compress_control_page(target);
+ if (IS_ERR(target))
+ continue;
+ }
+
+ if (inode && inode == target->mapping->host)
+ return true;
+ if (page && page == target)
+ return true;
+ if (ino && ino == ino_of_node(target))
+ return true;
+ }
+
+ return false;
+}
+
+static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
+ enum page_type type, enum temp_type temp)
+{
+ enum page_type btype = PAGE_TYPE_OF_BIO(type);
+ struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
+
+ down_write(&io->io_rwsem);
+
+ /* change META to META_FLUSH in the checkpoint procedure */
+ if (type >= META_FLUSH) {
+ io->fio.type = META_FLUSH;
+ io->fio.op = REQ_OP_WRITE;
+ io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
+ if (!test_opt(sbi, NOBARRIER))
+ io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
+ }
+ __submit_merged_bio(io);
+ up_write(&io->io_rwsem);
+}
+
+static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
+ struct inode *inode, struct page *page,
+ nid_t ino, enum page_type type, bool force)
+{
+ enum temp_type temp;
+ bool ret = true;
+
+ for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
+ if (!force) {
+ enum page_type btype = PAGE_TYPE_OF_BIO(type);
+ struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
+
+ down_read(&io->io_rwsem);
+ ret = __has_merged_page(io->bio, inode, page, ino);
+ up_read(&io->io_rwsem);
+ }
+ if (ret)
+ __f2fs_submit_merged_write(sbi, type, temp);
+
+ /* TODO: use HOT temp only for meta pages now. */
+ if (type >= META)
+ break;
+ }
+}
+
+void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
+{
+ __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
+}
+
+void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
+ struct inode *inode, struct page *page,
+ nid_t ino, enum page_type type)
+{
+ __submit_merged_write_cond(sbi, inode, page, ino, type, false);
+}
+
+void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
+{
+ f2fs_submit_merged_write(sbi, DATA);
+ f2fs_submit_merged_write(sbi, NODE);
+ f2fs_submit_merged_write(sbi, META);
+}
+
+/*
+ * Fill the locked page with data located in the block address.
+ * A caller needs to unlock the page on failure.
+ */
+int f2fs_submit_page_bio(struct f2fs_io_info *fio)
+{
+ struct bio *bio;
+ struct page *page = fio->encrypted_page ?
+ fio->encrypted_page : fio->page;
+
+ if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
+ fio->is_por ? META_POR : (__is_meta_io(fio) ?
+ META_GENERIC : DATA_GENERIC_ENHANCE)))
+ return -EFSCORRUPTED;
+
+ trace_f2fs_submit_page_bio(page, fio);
+
+ /* Allocate a new bio */
+ bio = __bio_alloc(fio, 1);
+
+ f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,
+ fio->page->index, fio, GFP_NOIO);
+
+ if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
+ bio_put(bio);
+ return -EFAULT;
+ }
+
+ if (fio->io_wbc && !is_read_io(fio->op))
+ wbc_account_cgroup_owner(fio->io_wbc, fio->page, PAGE_SIZE);
+
+ __attach_io_flag(fio);
+ bio_set_op_attrs(bio, fio->op, fio->op_flags);
+
+ inc_page_count(fio->sbi, is_read_io(fio->op) ?
+ __read_io_type(page): WB_DATA_TYPE(fio->page));
+
+ __submit_bio(fio->sbi, bio, fio->type);
+ return 0;
+}
+
+static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
+ block_t last_blkaddr, block_t cur_blkaddr)
+{
+ if (unlikely(sbi->max_io_bytes &&
+ bio->bi_iter.bi_size >= sbi->max_io_bytes))
+ return false;
+ if (last_blkaddr + 1 != cur_blkaddr)
+ return false;
+ return __same_bdev(sbi, cur_blkaddr, bio);
+}
+
+static bool io_type_is_mergeable(struct f2fs_bio_info *io,
+ struct f2fs_io_info *fio)
+{
+ if (io->fio.op != fio->op)
+ return false;
+ return io->fio.op_flags == fio->op_flags;
+}
+
+static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
+ struct f2fs_bio_info *io,
+ struct f2fs_io_info *fio,
+ block_t last_blkaddr,
+ block_t cur_blkaddr)
+{
+ if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
+ unsigned int filled_blocks =
+ F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
+ unsigned int io_size = F2FS_IO_SIZE(sbi);
+ unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
+
+ /* IOs in bio is aligned and left space of vectors is not enough */
+ if (!(filled_blocks % io_size) && left_vecs < io_size)
+ return false;
+ }
+ if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
+ return false;
+ return io_type_is_mergeable(io, fio);
+}
+
+static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,
+ struct page *page, enum temp_type temp)
+{
+ struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
+ struct bio_entry *be;
+
+ be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
+ be->bio = bio;
+ bio_get(bio);
+
+ if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)
+ f2fs_bug_on(sbi, 1);
+
+ down_write(&io->bio_list_lock);
+ list_add_tail(&be->list, &io->bio_list);
+ up_write(&io->bio_list_lock);
+}
+
+static void del_bio_entry(struct bio_entry *be)
+{
+ list_del(&be->list);
+ kmem_cache_free(bio_entry_slab, be);
+}
+
+static int add_ipu_page(struct f2fs_io_info *fio, struct bio **bio,
+ struct page *page)
+{
+ struct f2fs_sb_info *sbi = fio->sbi;
+ enum temp_type temp;
+ bool found = false;
+ int ret = -EAGAIN;
+
+ for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
+ struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
+ struct list_head *head = &io->bio_list;
+ struct bio_entry *be;
+
+ down_write(&io->bio_list_lock);
+ list_for_each_entry(be, head, list) {
+ if (be->bio != *bio)
+ continue;
+
+ found = true;
+
+ f2fs_bug_on(sbi, !page_is_mergeable(sbi, *bio,
+ *fio->last_block,
+ fio->new_blkaddr));
+ if (f2fs_crypt_mergeable_bio(*bio,
+ fio->page->mapping->host,
+ fio->page->index, fio) &&
+ bio_add_page(*bio, page, PAGE_SIZE, 0) ==
+ PAGE_SIZE) {
+ ret = 0;
+ break;
+ }
+
+ /* page can't be merged into bio; submit the bio */
+ del_bio_entry(be);
+ __submit_bio(sbi, *bio, DATA);
+ break;
+ }
+ up_write(&io->bio_list_lock);
+ }
+
+ if (ret) {
+ bio_put(*bio);
+ *bio = NULL;
+ }
+
+ return ret;
+}
+
+void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
+ struct bio **bio, struct page *page)
+{
+ enum temp_type temp;
+ bool found = false;
+ struct bio *target = bio ? *bio : NULL;
+
+ for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
+ struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
+ struct list_head *head = &io->bio_list;
+ struct bio_entry *be;
+
+ if (list_empty(head))
+ continue;
+
+ down_read(&io->bio_list_lock);
+ list_for_each_entry(be, head, list) {
+ if (target)
+ found = (target == be->bio);
+ else
+ found = __has_merged_page(be->bio, NULL,
+ page, 0);
+ if (found)
+ break;
+ }
+ up_read(&io->bio_list_lock);
+
+ if (!found)
+ continue;
+
+ found = false;
+
+ down_write(&io->bio_list_lock);
+ list_for_each_entry(be, head, list) {
+ if (target)
+ found = (target == be->bio);
+ else
+ found = __has_merged_page(be->bio, NULL,
+ page, 0);
+ if (found) {
+ target = be->bio;
+ del_bio_entry(be);
+ break;
+ }
+ }
+ up_write(&io->bio_list_lock);
+ }
+
+ if (found)
+ __submit_bio(sbi, target, DATA);
+ if (bio && *bio) {
+ bio_put(*bio);
+ *bio = NULL;
+ }
+}
+
+int f2fs_merge_page_bio(struct f2fs_io_info *fio)
+{
+ struct bio *bio = *fio->bio;
+ struct page *page = fio->encrypted_page ?
+ fio->encrypted_page : fio->page;
+
+ if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
+ __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
+ return -EFSCORRUPTED;
+
+ trace_f2fs_submit_page_bio(page, fio);
+
+ if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
+ fio->new_blkaddr))
+ f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);
+alloc_new:
+ if (!bio) {
+ bio = __bio_alloc(fio, BIO_MAX_PAGES);
+ __attach_io_flag(fio);
+ f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,
+ fio->page->index, fio, GFP_NOIO);
+ bio_set_op_attrs(bio, fio->op, fio->op_flags);
+
+ add_bio_entry(fio->sbi, bio, page, fio->temp);
+ } else {
+ if (add_ipu_page(fio, &bio, page))
+ goto alloc_new;
+ }
+
+ if (fio->io_wbc)
+ wbc_account_cgroup_owner(fio->io_wbc, fio->page, PAGE_SIZE);
+
+ inc_page_count(fio->sbi, WB_DATA_TYPE(page));
+
+ *fio->last_block = fio->new_blkaddr;
+ *fio->bio = bio;
+
+ return 0;
+}
+
+void f2fs_submit_page_write(struct f2fs_io_info *fio)
+{
+ struct f2fs_sb_info *sbi = fio->sbi;
+ enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
+ struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
+ struct page *bio_page;
+
+ f2fs_bug_on(sbi, is_read_io(fio->op));
+
+ down_write(&io->io_rwsem);
+next:
+ if (fio->in_list) {
+ spin_lock(&io->io_lock);
+ if (list_empty(&io->io_list)) {
+ spin_unlock(&io->io_lock);
+ goto out;
+ }
+ fio = list_first_entry(&io->io_list,
+ struct f2fs_io_info, list);
+ list_del(&fio->list);
+ spin_unlock(&io->io_lock);
+ }
+
+ verify_fio_blkaddr(fio);
+
+ if (fio->encrypted_page)
+ bio_page = fio->encrypted_page;
+ else if (fio->compressed_page)
+ bio_page = fio->compressed_page;
+ else
+ bio_page = fio->page;
+
+ /* set submitted = true as a return value */
+ fio->submitted = true;
+
+ inc_page_count(sbi, WB_DATA_TYPE(bio_page));
+
+ if (io->bio &&
+ (!io_is_mergeable(sbi, io->bio, io, fio, io->last_block_in_bio,
+ fio->new_blkaddr) ||
+ !f2fs_crypt_mergeable_bio(io->bio, fio->page->mapping->host,
+ bio_page->index, fio)))
+ __submit_merged_bio(io);
+alloc_new:
+ if (io->bio == NULL) {
+ if (F2FS_IO_ALIGNED(sbi) &&
+ (fio->type == DATA || fio->type == NODE) &&
+ fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
+ dec_page_count(sbi, WB_DATA_TYPE(bio_page));
+ fio->retry = true;
+ goto skip;
+ }
+ io->bio = __bio_alloc(fio, BIO_MAX_PAGES);
+ f2fs_set_bio_crypt_ctx(io->bio, fio->page->mapping->host,
+ bio_page->index, fio, GFP_NOIO);
+ io->fio = *fio;
+ }
+
+ if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
+ __submit_merged_bio(io);
+ goto alloc_new;
+ }
+
+ if (fio->io_wbc)
+ wbc_account_cgroup_owner(fio->io_wbc, fio->page, PAGE_SIZE);
+
+ io->last_block_in_bio = fio->new_blkaddr;
+
+ trace_f2fs_submit_page_write(fio->page, fio);
+skip:
+ if (fio->in_list)
+ goto next;
+out:
+ if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
+ !f2fs_is_checkpoint_ready(sbi))
+ __submit_merged_bio(io);
+ up_write(&io->io_rwsem);
+}
+
+static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
+ unsigned nr_pages, unsigned op_flag,
+ pgoff_t first_idx, bool for_write)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct bio *bio;
+ struct bio_post_read_ctx *ctx;
+ unsigned int post_read_steps = 0;
+
+ bio = bio_alloc_bioset(for_write ? GFP_NOIO : GFP_KERNEL,
+ min_t(int, nr_pages, BIO_MAX_PAGES),
+ &f2fs_bioset);
+ if (!bio)
+ return ERR_PTR(-ENOMEM);
+
+ f2fs_set_bio_crypt_ctx(bio, inode, first_idx, NULL, GFP_NOFS);
+
+ f2fs_target_device(sbi, blkaddr, bio);
+ bio->bi_end_io = f2fs_read_end_io;
+ bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
+
+ if (fscrypt_inode_uses_fs_layer_crypto(inode))
+ post_read_steps |= STEP_DECRYPT;
+
+ if (f2fs_need_verity(inode, first_idx))
+ post_read_steps |= STEP_VERITY;
+
+ /*
+ * STEP_DECOMPRESS is handled specially, since a compressed file might
+ * contain both compressed and uncompressed clusters. We'll allocate a
+ * bio_post_read_ctx if the file is compressed, but the caller is
+ * responsible for enabling STEP_DECOMPRESS if it's actually needed.
+ */
+
+ if (post_read_steps || f2fs_compressed_file(inode)) {
+ /* Due to the mempool, this never fails. */
+ ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
+ ctx->bio = bio;
+ ctx->sbi = sbi;
+ ctx->enabled_steps = post_read_steps;
+ bio->bi_private = ctx;
+ }
+
+ return bio;
+}
+
+/* This can handle encryption stuffs */
+static int f2fs_submit_page_read(struct inode *inode, struct page *page,
+ block_t blkaddr, int op_flags, bool for_write)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct bio *bio;
+
+ bio = f2fs_grab_read_bio(inode, blkaddr, 1, op_flags,
+ page->index, for_write);
+ if (IS_ERR(bio))
+ return PTR_ERR(bio);
+
+ /* wait for GCed page writeback via META_MAPPING */
+ f2fs_wait_on_block_writeback(inode, blkaddr);
+
+ if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
+ bio_put(bio);
+ return -EFAULT;
+ }
+ ClearPageError(page);
+ inc_page_count(sbi, F2FS_RD_DATA);
+ f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
+ __submit_bio(sbi, bio, DATA);
+ return 0;
+}
+
+static void __set_data_blkaddr(struct dnode_of_data *dn)
+{
+ struct f2fs_node *rn = F2FS_NODE(dn->node_page);
+ __le32 *addr_array;
+ int base = 0;
+
+ if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
+ base = get_extra_isize(dn->inode);
+
+ /* Get physical address of data block */
+ addr_array = blkaddr_in_node(rn);
+ addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
+}
+
+/*
+ * Lock ordering for the change of data block address:
+ * ->data_page
+ * ->node_page
+ * update block addresses in the node page
+ */
+void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
+{
+ f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
+ __set_data_blkaddr(dn);
+ if (set_page_dirty(dn->node_page))
+ dn->node_changed = true;
+}
+
+void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
+{
+ dn->data_blkaddr = blkaddr;
+ f2fs_set_data_blkaddr(dn);
+ f2fs_update_extent_cache(dn);
+}
+
+/* dn->ofs_in_node will be returned with up-to-date last block pointer */
+int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+ int err;
+
+ if (!count)
+ return 0;
+
+ if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
+ return -EPERM;
+ if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
+ return err;
+
+ trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
+ dn->ofs_in_node, count);
+
+ f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
+
+ for (; count > 0; dn->ofs_in_node++) {
+ block_t blkaddr = f2fs_data_blkaddr(dn);
+
+ if (blkaddr == NULL_ADDR) {
+ dn->data_blkaddr = NEW_ADDR;
+ __set_data_blkaddr(dn);
+ count--;
+ }
+ }
+
+ if (set_page_dirty(dn->node_page))
+ dn->node_changed = true;
+ return 0;
+}
+
+/* Should keep dn->ofs_in_node unchanged */
+int f2fs_reserve_new_block(struct dnode_of_data *dn)
+{
+ unsigned int ofs_in_node = dn->ofs_in_node;
+ int ret;
+
+ ret = f2fs_reserve_new_blocks(dn, 1);
+ dn->ofs_in_node = ofs_in_node;
+ return ret;
+}
+
+int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
+{
+ bool need_put = dn->inode_page ? false : true;
+ int err;
+
+ err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
+ if (err)
+ return err;
+
+ if (dn->data_blkaddr == NULL_ADDR)
+ err = f2fs_reserve_new_block(dn);
+ if (err || need_put)
+ f2fs_put_dnode(dn);
+ return err;
+}
+
+int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
+{
+ struct extent_info ei = {0, 0, 0};
+ struct inode *inode = dn->inode;
+
+ if (f2fs_lookup_extent_cache(inode, index, &ei)) {
+ dn->data_blkaddr = ei.blk + index - ei.fofs;
+ return 0;
+ }
+
+ return f2fs_reserve_block(dn, index);
+}
+
+struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
+ int op_flags, bool for_write)
+{
+ struct address_space *mapping = inode->i_mapping;
+ struct dnode_of_data dn;
+ struct page *page;
+ struct extent_info ei = {0,0,0};
+ int err;
+
+ page = f2fs_grab_cache_page(mapping, index, for_write);
+ if (!page)
+ return ERR_PTR(-ENOMEM);
+
+ if (f2fs_lookup_extent_cache(inode, index, &ei)) {
+ dn.data_blkaddr = ei.blk + index - ei.fofs;
+ if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
+ DATA_GENERIC_ENHANCE_READ)) {
+ err = -EFSCORRUPTED;
+ goto put_err;
+ }
+ goto got_it;
+ }
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
+ if (err)
+ goto put_err;
+ f2fs_put_dnode(&dn);
+
+ if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
+ err = -ENOENT;
+ goto put_err;
+ }
+ if (dn.data_blkaddr != NEW_ADDR &&
+ !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
+ dn.data_blkaddr,
+ DATA_GENERIC_ENHANCE)) {
+ err = -EFSCORRUPTED;
+ goto put_err;
+ }
+got_it:
+ if (PageUptodate(page)) {
+ unlock_page(page);
+ return page;
+ }
+
+ /*
+ * A new dentry page is allocated but not able to be written, since its
+ * new inode page couldn't be allocated due to -ENOSPC.
+ * In such the case, its blkaddr can be remained as NEW_ADDR.
+ * see, f2fs_add_link -> f2fs_get_new_data_page ->
+ * f2fs_init_inode_metadata.
+ */
+ if (dn.data_blkaddr == NEW_ADDR) {
+ zero_user_segment(page, 0, PAGE_SIZE);
+ if (!PageUptodate(page))
+ SetPageUptodate(page);
+ unlock_page(page);
+ return page;
+ }
+
+ err = f2fs_submit_page_read(inode, page, dn.data_blkaddr,
+ op_flags, for_write);
+ if (err)
+ goto put_err;
+ return page;
+
+put_err:
+ f2fs_put_page(page, 1);
+ return ERR_PTR(err);
+}
+
+struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
+{
+ struct address_space *mapping = inode->i_mapping;
+ struct page *page;
+
+ page = find_get_page(mapping, index);
+ if (page && PageUptodate(page))
+ return page;
+ f2fs_put_page(page, 0);
+
+ page = f2fs_get_read_data_page(inode, index, 0, false);
+ if (IS_ERR(page))
+ return page;
+
+ if (PageUptodate(page))
+ return page;
+
+ wait_on_page_locked(page);
+ if (unlikely(!PageUptodate(page))) {
+ f2fs_put_page(page, 0);
+ return ERR_PTR(-EIO);
+ }
+ return page;
+}
+
+/*
+ * If it tries to access a hole, return an error.
+ * Because, the callers, functions in dir.c and GC, should be able to know
+ * whether this page exists or not.
+ */
+struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
+ bool for_write)
+{
+ struct address_space *mapping = inode->i_mapping;
+ struct page *page;
+repeat:
+ page = f2fs_get_read_data_page(inode, index, 0, for_write);
+ if (IS_ERR(page))
+ return page;
+
+ /* wait for read completion */
+ lock_page(page);
+ if (unlikely(page->mapping != mapping)) {
+ f2fs_put_page(page, 1);
+ goto repeat;
+ }
+ if (unlikely(!PageUptodate(page))) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(-EIO);
+ }
+ return page;
+}
+
+/*
+ * Caller ensures that this data page is never allocated.
+ * A new zero-filled data page is allocated in the page cache.
+ *
+ * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
+ * f2fs_unlock_op().
+ * Note that, ipage is set only by make_empty_dir, and if any error occur,
+ * ipage should be released by this function.
+ */
+struct page *f2fs_get_new_data_page(struct inode *inode,
+ struct page *ipage, pgoff_t index, bool new_i_size)
+{
+ struct address_space *mapping = inode->i_mapping;
+ struct page *page;
+ struct dnode_of_data dn;
+ int err;
+
+ page = f2fs_grab_cache_page(mapping, index, true);
+ if (!page) {
+ /*
+ * before exiting, we should make sure ipage will be released
+ * if any error occur.
+ */
+ f2fs_put_page(ipage, 1);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ set_new_dnode(&dn, inode, ipage, NULL, 0);
+ err = f2fs_reserve_block(&dn, index);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(err);
+ }
+ if (!ipage)
+ f2fs_put_dnode(&dn);
+
+ if (PageUptodate(page))
+ goto got_it;
+
+ if (dn.data_blkaddr == NEW_ADDR) {
+ zero_user_segment(page, 0, PAGE_SIZE);
+ if (!PageUptodate(page))
+ SetPageUptodate(page);
+ } else {
+ f2fs_put_page(page, 1);
+
+ /* if ipage exists, blkaddr should be NEW_ADDR */
+ f2fs_bug_on(F2FS_I_SB(inode), ipage);
+ page = f2fs_get_lock_data_page(inode, index, true);
+ if (IS_ERR(page))
+ return page;
+ }
+got_it:
+ if (new_i_size && i_size_read(inode) <
+ ((loff_t)(index + 1) << PAGE_SHIFT))
+ f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
+ return page;
+}
+
+static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+ struct f2fs_summary sum;
+ struct node_info ni;
+ block_t old_blkaddr;
+ blkcnt_t count = 1;
+ int err;
+
+ if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
+ return -EPERM;
+
+ err = f2fs_get_node_info(sbi, dn->nid, &ni);
+ if (err)
+ return err;
+
+ dn->data_blkaddr = f2fs_data_blkaddr(dn);
+ if (dn->data_blkaddr != NULL_ADDR)
+ goto alloc;
+
+ if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
+ return err;
+
+alloc:
+ set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
+ old_blkaddr = dn->data_blkaddr;
+ f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
+ &sum, seg_type, NULL);
+ if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) {
+ invalidate_mapping_pages(META_MAPPING(sbi),
+ old_blkaddr, old_blkaddr);
+ f2fs_invalidate_compress_page(sbi, old_blkaddr);
+ }
+ f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
+
+ /*
+ * i_size will be updated by direct_IO. Otherwise, we'll get stale
+ * data from unwritten block via dio_read.
+ */
+ return 0;
+}
+
+int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
+{
+ struct inode *inode = file_inode(iocb->ki_filp);
+ struct f2fs_map_blocks map;
+ int flag;
+ int err = 0;
+ bool direct_io = iocb->ki_flags & IOCB_DIRECT;
+
+ map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
+ map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
+ if (map.m_len > map.m_lblk)
+ map.m_len -= map.m_lblk;
+ else
+ map.m_len = 0;
+
+ map.m_next_pgofs = NULL;
+ map.m_next_extent = NULL;
+ map.m_seg_type = NO_CHECK_TYPE;
+ map.m_may_create = true;
+
+ if (direct_io) {
+ map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
+ flag = f2fs_force_buffered_io(inode, iocb, from) ?
+ F2FS_GET_BLOCK_PRE_AIO :
+ F2FS_GET_BLOCK_PRE_DIO;
+ goto map_blocks;
+ }
+ if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
+ err = f2fs_convert_inline_inode(inode);
+ if (err)
+ return err;
+ }
+ if (f2fs_has_inline_data(inode))
+ return err;
+
+ flag = F2FS_GET_BLOCK_PRE_AIO;
+
+map_blocks:
+ err = f2fs_map_blocks(inode, &map, 1, flag);
+ if (map.m_len > 0 && err == -ENOSPC) {
+ if (!direct_io)
+ set_inode_flag(inode, FI_NO_PREALLOC);
+ err = 0;
+ }
+ return err;
+}
+
+void f2fs_do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
+{
+ if (flag == F2FS_GET_BLOCK_PRE_AIO) {
+ if (lock)
+ down_read(&sbi->node_change);
+ else
+ up_read(&sbi->node_change);
+ } else {
+ if (lock)
+ f2fs_lock_op(sbi);
+ else
+ f2fs_unlock_op(sbi);
+ }
+}
+
+/*
+ * f2fs_map_blocks() tries to find or build mapping relationship which
+ * maps continuous logical blocks to physical blocks, and return such
+ * info via f2fs_map_blocks structure.
+ */
+int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
+ int create, int flag)
+{
+ unsigned int maxblocks = map->m_len;
+ struct dnode_of_data dn;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
+ pgoff_t pgofs, end_offset, end;
+ int err = 0, ofs = 1;
+ unsigned int ofs_in_node, last_ofs_in_node;
+ blkcnt_t prealloc;
+ struct extent_info ei = {0,0,0};
+ block_t blkaddr;
+ unsigned int start_pgofs;
+
+ if (!maxblocks)
+ return 0;
+
+ map->m_len = 0;
+ map->m_flags = 0;
+
+ /* it only supports block size == page size */
+ pgofs = (pgoff_t)map->m_lblk;
+ end = pgofs + maxblocks;
+
+ if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
+ if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
+ map->m_may_create)
+ goto next_dnode;
+
+ map->m_pblk = ei.blk + pgofs - ei.fofs;
+ map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
+ map->m_flags = F2FS_MAP_MAPPED;
+ if (map->m_next_extent)
+ *map->m_next_extent = pgofs + map->m_len;
+
+ /* for hardware encryption, but to avoid potential issue in future */
+ if (flag == F2FS_GET_BLOCK_DIO)
+ f2fs_wait_on_block_writeback_range(inode,
+ map->m_pblk, map->m_len);
+ goto out;
+ }
+
+next_dnode:
+ if (map->m_may_create)
+ f2fs_do_map_lock(sbi, flag, true);
+
+ /* When reading holes, we need its node page */
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
+ if (err) {
+ if (flag == F2FS_GET_BLOCK_BMAP)
+ map->m_pblk = 0;
+
+ if (err == -ENOENT) {
+ /*
+ * There is one exceptional case that read_node_page()
+ * may return -ENOENT due to filesystem has been
+ * shutdown or cp_error, so force to convert error
+ * number to EIO for such case.
+ */
+ if (map->m_may_create &&
+ (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
+ f2fs_cp_error(sbi))) {
+ err = -EIO;
+ goto unlock_out;
+ }
+
+ err = 0;
+ if (map->m_next_pgofs)
+ *map->m_next_pgofs =
+ f2fs_get_next_page_offset(&dn, pgofs);
+ if (map->m_next_extent)
+ *map->m_next_extent =
+ f2fs_get_next_page_offset(&dn, pgofs);
+ }
+ goto unlock_out;
+ }
+
+ start_pgofs = pgofs;
+ prealloc = 0;
+ last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
+ end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
+
+next_block:
+ blkaddr = f2fs_data_blkaddr(&dn);
+
+ if (__is_valid_data_blkaddr(blkaddr) &&
+ !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
+ err = -EFSCORRUPTED;
+ goto sync_out;
+ }
+
+ if (__is_valid_data_blkaddr(blkaddr)) {
+ /* use out-place-update for driect IO under LFS mode */
+ if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
+ map->m_may_create) {
+ err = __allocate_data_block(&dn, map->m_seg_type);
+ if (err)
+ goto sync_out;
+ blkaddr = dn.data_blkaddr;
+ set_inode_flag(inode, FI_APPEND_WRITE);
+ }
+ } else {
+ if (create) {
+ if (unlikely(f2fs_cp_error(sbi))) {
+ err = -EIO;
+ goto sync_out;
+ }
+ if (flag == F2FS_GET_BLOCK_PRE_AIO) {
+ if (blkaddr == NULL_ADDR) {
+ prealloc++;
+ last_ofs_in_node = dn.ofs_in_node;
+ }
+ } else {
+ WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
+ flag != F2FS_GET_BLOCK_DIO);
+ err = __allocate_data_block(&dn,
+ map->m_seg_type);
+ if (!err)
+ set_inode_flag(inode, FI_APPEND_WRITE);
+ }
+ if (err)
+ goto sync_out;
+ map->m_flags |= F2FS_MAP_NEW;
+ blkaddr = dn.data_blkaddr;
+ } else {
+ if (flag == F2FS_GET_BLOCK_BMAP) {
+ map->m_pblk = 0;
+ goto sync_out;
+ }
+ if (flag == F2FS_GET_BLOCK_PRECACHE)
+ goto sync_out;
+ if (flag == F2FS_GET_BLOCK_FIEMAP &&
+ blkaddr == NULL_ADDR) {
+ if (map->m_next_pgofs)
+ *map->m_next_pgofs = pgofs + 1;
+ goto sync_out;
+ }
+ if (flag != F2FS_GET_BLOCK_FIEMAP) {
+ /* for defragment case */
+ if (map->m_next_pgofs)
+ *map->m_next_pgofs = pgofs + 1;
+ goto sync_out;
+ }
+ }
+ }
+
+ if (flag == F2FS_GET_BLOCK_PRE_AIO)
+ goto skip;
+
+ if (map->m_len == 0) {
+ /* preallocated unwritten block should be mapped for fiemap. */
+ if (blkaddr == NEW_ADDR)
+ map->m_flags |= F2FS_MAP_UNWRITTEN;
+ map->m_flags |= F2FS_MAP_MAPPED;
+
+ map->m_pblk = blkaddr;
+ map->m_len = 1;
+ } else if ((map->m_pblk != NEW_ADDR &&
+ blkaddr == (map->m_pblk + ofs)) ||
+ (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
+ flag == F2FS_GET_BLOCK_PRE_DIO) {
+ ofs++;
+ map->m_len++;
+ } else {
+ goto sync_out;
+ }
+
+skip:
+ dn.ofs_in_node++;
+ pgofs++;
+
+ /* preallocate blocks in batch for one dnode page */
+ if (flag == F2FS_GET_BLOCK_PRE_AIO &&
+ (pgofs == end || dn.ofs_in_node == end_offset)) {
+
+ dn.ofs_in_node = ofs_in_node;
+ err = f2fs_reserve_new_blocks(&dn, prealloc);
+ if (err)
+ goto sync_out;
+
+ map->m_len += dn.ofs_in_node - ofs_in_node;
+ if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
+ err = -ENOSPC;
+ goto sync_out;
+ }
+ dn.ofs_in_node = end_offset;
+ }
+
+ if (pgofs >= end)
+ goto sync_out;
+ else if (dn.ofs_in_node < end_offset)
+ goto next_block;
+
+ if (flag == F2FS_GET_BLOCK_PRECACHE) {
+ if (map->m_flags & F2FS_MAP_MAPPED) {
+ unsigned int ofs = start_pgofs - map->m_lblk;
+
+ f2fs_update_extent_cache_range(&dn,
+ start_pgofs, map->m_pblk + ofs,
+ map->m_len - ofs);
+ }
+ }
+
+ f2fs_put_dnode(&dn);
+
+ if (map->m_may_create) {
+ f2fs_do_map_lock(sbi, flag, false);
+ f2fs_balance_fs(sbi, dn.node_changed);
+ }
+ goto next_dnode;
+
+sync_out:
+
+ /* for hardware encryption, but to avoid potential issue in future */
+ if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
+ f2fs_wait_on_block_writeback_range(inode,
+ map->m_pblk, map->m_len);
+
+ if (flag == F2FS_GET_BLOCK_PRECACHE) {
+ if (map->m_flags & F2FS_MAP_MAPPED) {
+ unsigned int ofs = start_pgofs - map->m_lblk;
+
+ f2fs_update_extent_cache_range(&dn,
+ start_pgofs, map->m_pblk + ofs,
+ map->m_len - ofs);
+ }
+ if (map->m_next_extent)
+ *map->m_next_extent = pgofs + 1;
+ }
+ f2fs_put_dnode(&dn);
+unlock_out:
+ if (map->m_may_create) {
+ f2fs_do_map_lock(sbi, flag, false);
+ f2fs_balance_fs(sbi, dn.node_changed);
+ }
+out:
+ trace_f2fs_map_blocks(inode, map, err);
+ return err;
+}
+
+bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
+{
+ struct f2fs_map_blocks map;
+ block_t last_lblk;
+ int err;
+
+ if (pos + len > i_size_read(inode))
+ return false;
+
+ map.m_lblk = F2FS_BYTES_TO_BLK(pos);
+ map.m_next_pgofs = NULL;
+ map.m_next_extent = NULL;
+ map.m_seg_type = NO_CHECK_TYPE;
+ map.m_may_create = false;
+ last_lblk = F2FS_BLK_ALIGN(pos + len);
+
+ while (map.m_lblk < last_lblk) {
+ map.m_len = last_lblk - map.m_lblk;
+ err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
+ if (err || map.m_len == 0)
+ return false;
+ map.m_lblk += map.m_len;
+ }
+ return true;
+}
+
+static inline u64 bytes_to_blks(struct inode *inode, u64 bytes)
+{
+ return (bytes >> inode->i_blkbits);
+}
+
+static inline u64 blks_to_bytes(struct inode *inode, u64 blks)
+{
+ return (blks << inode->i_blkbits);
+}
+
+static int __get_data_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh, int create, int flag,
+ pgoff_t *next_pgofs, int seg_type, bool may_write)
+{
+ struct f2fs_map_blocks map;
+ int err;
+
+ map.m_lblk = iblock;
+ map.m_len = bytes_to_blks(inode, bh->b_size);
+ map.m_next_pgofs = next_pgofs;
+ map.m_next_extent = NULL;
+ map.m_seg_type = seg_type;
+ map.m_may_create = may_write;
+
+ err = f2fs_map_blocks(inode, &map, create, flag);
+ if (!err) {
+ map_bh(bh, inode->i_sb, map.m_pblk);
+ bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
+ bh->b_size = blks_to_bytes(inode, map.m_len);
+ }
+ return err;
+}
+
+static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
+{
+ return __get_data_block(inode, iblock, bh_result, create,
+ F2FS_GET_BLOCK_DIO, NULL,
+ f2fs_rw_hint_to_seg_type(inode->i_write_hint),
+ true);
+}
+
+static int get_data_block_dio(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
+{
+ return __get_data_block(inode, iblock, bh_result, create,
+ F2FS_GET_BLOCK_DIO, NULL,
+ f2fs_rw_hint_to_seg_type(inode->i_write_hint),
+ false);
+}
+
+static int f2fs_xattr_fiemap(struct inode *inode,
+ struct fiemap_extent_info *fieinfo)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct page *page;
+ struct node_info ni;
+ __u64 phys = 0, len;
+ __u32 flags;
+ nid_t xnid = F2FS_I(inode)->i_xattr_nid;
+ int err = 0;
+
+ if (f2fs_has_inline_xattr(inode)) {
+ int offset;
+
+ page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
+ inode->i_ino, false);
+ if (!page)
+ return -ENOMEM;
+
+ err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return err;
+ }
+
+ phys = blks_to_bytes(inode, ni.blk_addr);
+ offset = offsetof(struct f2fs_inode, i_addr) +
+ sizeof(__le32) * (DEF_ADDRS_PER_INODE -
+ get_inline_xattr_addrs(inode));
+
+ phys += offset;
+ len = inline_xattr_size(inode);
+
+ f2fs_put_page(page, 1);
+
+ flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
+
+ if (!xnid)
+ flags |= FIEMAP_EXTENT_LAST;
+
+ err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
+ trace_f2fs_fiemap(inode, 0, phys, len, flags, err);
+ if (err || err == 1)
+ return err;
+ }
+
+ if (xnid) {
+ page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
+ if (!page)
+ return -ENOMEM;
+
+ err = f2fs_get_node_info(sbi, xnid, &ni);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return err;
+ }
+
+ phys = blks_to_bytes(inode, ni.blk_addr);
+ len = inode->i_sb->s_blocksize;
+
+ f2fs_put_page(page, 1);
+
+ flags = FIEMAP_EXTENT_LAST;
+ }
+
+ if (phys) {
+ err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
+ trace_f2fs_fiemap(inode, 0, phys, len, flags, err);
+ }
+
+ return (err < 0 ? err : 0);
+}
+
+static loff_t max_inode_blocks(struct inode *inode)
+{
+ loff_t result = ADDRS_PER_INODE(inode);
+ loff_t leaf_count = ADDRS_PER_BLOCK(inode);
+
+ /* two direct node blocks */
+ result += (leaf_count * 2);
+
+ /* two indirect node blocks */
+ leaf_count *= NIDS_PER_BLOCK;
+ result += (leaf_count * 2);
+
+ /* one double indirect node block */
+ leaf_count *= NIDS_PER_BLOCK;
+ result += leaf_count;
+
+ return result;
+}
+
+int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+ u64 start, u64 len)
+{
+ struct f2fs_map_blocks map;
+ sector_t start_blk, last_blk;
+ pgoff_t next_pgofs;
+ u64 logical = 0, phys = 0, size = 0;
+ u32 flags = 0;
+ int ret = 0;
+ bool compr_cluster = false;
+ unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
+ loff_t maxbytes;
+
+ if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
+ ret = f2fs_precache_extents(inode);
+ if (ret)
+ return ret;
+ }
+
+ ret = fiemap_prep(inode, fieinfo, start, &len,
+ FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
+ if (ret)
+ return ret;
+
+ inode_lock(inode);
+
+ maxbytes = max_file_blocks(inode) << F2FS_BLKSIZE_BITS;
+ if (start > maxbytes) {
+ ret = -EFBIG;
+ goto out;
+ }
+
+ if (len > maxbytes || (maxbytes - len) < start)
+ len = maxbytes - start;
+
+ if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
+ ret = f2fs_xattr_fiemap(inode, fieinfo);
+ goto out;
+ }
+
+ if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
+ ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
+ if (ret != -EAGAIN)
+ goto out;
+ }
+
+ if (bytes_to_blks(inode, len) == 0)
+ len = blks_to_bytes(inode, 1);
+
+ start_blk = bytes_to_blks(inode, start);
+ last_blk = bytes_to_blks(inode, start + len - 1);
+
+next:
+ memset(&map, 0, sizeof(map));
+ map.m_lblk = start_blk;
+ map.m_len = bytes_to_blks(inode, len);
+ map.m_next_pgofs = &next_pgofs;
+ map.m_seg_type = NO_CHECK_TYPE;
+
+ if (compr_cluster)
+ map.m_len = cluster_size - 1;
+
+ ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
+ if (ret)
+ goto out;
+
+ /* HOLE */
+ if (!(map.m_flags & F2FS_MAP_FLAGS)) {
+ start_blk = next_pgofs;
+
+ if (blks_to_bytes(inode, start_blk) < blks_to_bytes(inode,
+ max_inode_blocks(inode)))
+ goto prep_next;
+
+ flags |= FIEMAP_EXTENT_LAST;
+ }
+
+ if (size) {
+ flags |= FIEMAP_EXTENT_MERGED;
+ if (IS_ENCRYPTED(inode))
+ flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
+
+ ret = fiemap_fill_next_extent(fieinfo, logical,
+ phys, size, flags);
+ trace_f2fs_fiemap(inode, logical, phys, size, flags, ret);
+ if (ret)
+ goto out;
+ size = 0;
+ }
+
+ if (start_blk > last_blk)
+ goto out;
+
+ if (compr_cluster) {
+ compr_cluster = false;
+
+
+ logical = blks_to_bytes(inode, start_blk - 1);
+ phys = blks_to_bytes(inode, map.m_pblk);
+ size = blks_to_bytes(inode, cluster_size);
+
+ flags |= FIEMAP_EXTENT_ENCODED;
+
+ start_blk += cluster_size - 1;
+
+ if (start_blk > last_blk)
+ goto out;
+
+ goto prep_next;
+ }
+
+ if (map.m_pblk == COMPRESS_ADDR) {
+ compr_cluster = true;
+ start_blk++;
+ goto prep_next;
+ }
+
+ logical = blks_to_bytes(inode, start_blk);
+ phys = blks_to_bytes(inode, map.m_pblk);
+ size = blks_to_bytes(inode, map.m_len);
+ flags = 0;
+ if (map.m_flags & F2FS_MAP_UNWRITTEN)
+ flags = FIEMAP_EXTENT_UNWRITTEN;
+
+ start_blk += bytes_to_blks(inode, size);
+
+prep_next:
+ cond_resched();
+ if (fatal_signal_pending(current))
+ ret = -EINTR;
+ else
+ goto next;
+out:
+ if (ret == 1)
+ ret = 0;
+
+ inode_unlock(inode);
+ return ret;
+}
+
+static inline loff_t f2fs_readpage_limit(struct inode *inode)
+{
+ if (IS_ENABLED(CONFIG_FS_VERITY) &&
+ (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
+ return inode->i_sb->s_maxbytes;
+
+ return i_size_read(inode);
+}
+
+static int f2fs_read_single_page(struct inode *inode, struct page *page,
+ unsigned nr_pages,
+ struct f2fs_map_blocks *map,
+ struct bio **bio_ret,
+ sector_t *last_block_in_bio,
+ bool is_readahead)
+{
+ struct bio *bio = *bio_ret;
+ const unsigned blocksize = blks_to_bytes(inode, 1);
+ sector_t block_in_file;
+ sector_t last_block;
+ sector_t last_block_in_file;
+ sector_t block_nr;
+ int ret = 0;
+
+ block_in_file = (sector_t)page_index(page);
+ last_block = block_in_file + nr_pages;
+ last_block_in_file = bytes_to_blks(inode,
+ f2fs_readpage_limit(inode) + blocksize - 1);
+ if (last_block > last_block_in_file)
+ last_block = last_block_in_file;
+
+ /* just zeroing out page which is beyond EOF */
+ if (block_in_file >= last_block)
+ goto zero_out;
+ /*
+ * Map blocks using the previous result first.
+ */
+ if ((map->m_flags & F2FS_MAP_MAPPED) &&
+ block_in_file > map->m_lblk &&
+ block_in_file < (map->m_lblk + map->m_len))
+ goto got_it;
+
+ /*
+ * Then do more f2fs_map_blocks() calls until we are
+ * done with this page.
+ */
+ map->m_lblk = block_in_file;
+ map->m_len = last_block - block_in_file;
+
+ ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
+ if (ret)
+ goto out;
+got_it:
+ if ((map->m_flags & F2FS_MAP_MAPPED)) {
+ block_nr = map->m_pblk + block_in_file - map->m_lblk;
+ SetPageMappedToDisk(page);
+
+ if (!PageUptodate(page) && (!PageSwapCache(page) &&
+ !cleancache_get_page(page))) {
+ SetPageUptodate(page);
+ goto confused;
+ }
+
+ if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
+ DATA_GENERIC_ENHANCE_READ)) {
+ ret = -EFSCORRUPTED;
+ goto out;
+ }
+ } else {
+zero_out:
+ zero_user_segment(page, 0, PAGE_SIZE);
+ if (f2fs_need_verity(inode, page->index) &&
+ !fsverity_verify_page(page)) {
+ ret = -EIO;
+ goto out;
+ }
+ if (!PageUptodate(page))
+ SetPageUptodate(page);
+ unlock_page(page);
+ goto out;
+ }
+
+ /*
+ * This page will go to BIO. Do we need to send this
+ * BIO off first?
+ */
+ if (bio && (!page_is_mergeable(F2FS_I_SB(inode), bio,
+ *last_block_in_bio, block_nr) ||
+ !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) {
+submit_and_realloc:
+ __submit_bio(F2FS_I_SB(inode), bio, DATA);
+ bio = NULL;
+ }
+ if (bio == NULL) {
+ bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
+ is_readahead ? REQ_RAHEAD : 0, page->index,
+ false);
+ if (IS_ERR(bio)) {
+ ret = PTR_ERR(bio);
+ bio = NULL;
+ goto out;
+ }
+ }
+
+ /*
+ * If the page is under writeback, we need to wait for
+ * its completion to see the correct decrypted data.
+ */
+ f2fs_wait_on_block_writeback(inode, block_nr);
+
+ if (bio_add_page(bio, page, blocksize, 0) < blocksize)
+ goto submit_and_realloc;
+
+ inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
+ f2fs_update_iostat(F2FS_I_SB(inode), FS_DATA_READ_IO, F2FS_BLKSIZE);
+ ClearPageError(page);
+ *last_block_in_bio = block_nr;
+ goto out;
+confused:
+ if (bio) {
+ __submit_bio(F2FS_I_SB(inode), bio, DATA);
+ bio = NULL;
+ }
+ unlock_page(page);
+out:
+ *bio_ret = bio;
+ return ret;
+}
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
+ unsigned nr_pages, sector_t *last_block_in_bio,
+ bool is_readahead, bool for_write)
+{
+ struct dnode_of_data dn;
+ struct inode *inode = cc->inode;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct bio *bio = *bio_ret;
+ unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;
+ sector_t last_block_in_file;
+ const unsigned blocksize = blks_to_bytes(inode, 1);
+ struct decompress_io_ctx *dic = NULL;
+ int i;
+ int ret = 0;
+
+ f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
+
+ last_block_in_file = bytes_to_blks(inode,
+ f2fs_readpage_limit(inode) + blocksize - 1);
+
+ /* get rid of pages beyond EOF */
+ for (i = 0; i < cc->cluster_size; i++) {
+ struct page *page = cc->rpages[i];
+
+ if (!page)
+ continue;
+ if ((sector_t)page->index >= last_block_in_file) {
+ zero_user_segment(page, 0, PAGE_SIZE);
+ if (!PageUptodate(page))
+ SetPageUptodate(page);
+ } else if (!PageUptodate(page)) {
+ continue;
+ }
+ unlock_page(page);
+ cc->rpages[i] = NULL;
+ cc->nr_rpages--;
+ }
+
+ /* we are done since all pages are beyond EOF */
+ if (f2fs_cluster_is_empty(cc))
+ goto out;
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
+ if (ret)
+ goto out;
+
+ f2fs_bug_on(sbi, dn.data_blkaddr != COMPRESS_ADDR);
+
+ for (i = 1; i < cc->cluster_size; i++) {
+ block_t blkaddr;
+
+ blkaddr = data_blkaddr(dn.inode, dn.node_page,
+ dn.ofs_in_node + i);
+
+ if (!__is_valid_data_blkaddr(blkaddr))
+ break;
+
+ if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
+ ret = -EFAULT;
+ goto out_put_dnode;
+ }
+ cc->nr_cpages++;
+ }
+
+ /* nothing to decompress */
+ if (cc->nr_cpages == 0) {
+ ret = 0;
+ goto out_put_dnode;
+ }
+
+ dic = f2fs_alloc_dic(cc);
+ if (IS_ERR(dic)) {
+ ret = PTR_ERR(dic);
+ goto out_put_dnode;
+ }
+
+ for (i = 0; i < cc->nr_cpages; i++) {
+ struct page *page = dic->cpages[i];
+ block_t blkaddr;
+ struct bio_post_read_ctx *ctx;
+
+ blkaddr = data_blkaddr(dn.inode, dn.node_page,
+ dn.ofs_in_node + i + 1);
+
+ f2fs_wait_on_block_writeback(inode, blkaddr);
+
+ if (f2fs_load_compressed_page(sbi, page, blkaddr)) {
+ if (atomic_dec_and_test(&dic->remaining_pages))
+ f2fs_decompress_cluster(dic);
+ continue;
+ }
+
+ if (bio && (!page_is_mergeable(sbi, bio,
+ *last_block_in_bio, blkaddr) ||
+ !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) {
+submit_and_realloc:
+ __submit_bio(sbi, bio, DATA);
+ bio = NULL;
+ }
+
+ if (!bio) {
+ bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
+ is_readahead ? REQ_RAHEAD : 0,
+ page->index, for_write);
+ if (IS_ERR(bio)) {
+ ret = PTR_ERR(bio);
+ f2fs_decompress_end_io(dic, ret);
+ f2fs_put_dnode(&dn);
+ *bio_ret = NULL;
+ return ret;
+ }
+ }
+
+ if (bio_add_page(bio, page, blocksize, 0) < blocksize)
+ goto submit_and_realloc;
+
+ ctx = bio->bi_private;
+ ctx->enabled_steps |= STEP_DECOMPRESS;
+ refcount_inc(&dic->refcnt);
+
+ inc_page_count(sbi, F2FS_RD_DATA);
+ f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
+ f2fs_update_iostat(sbi, FS_CDATA_READ_IO, F2FS_BLKSIZE);
+ ClearPageError(page);
+ *last_block_in_bio = blkaddr;
+ }
+
+ f2fs_put_dnode(&dn);
+
+ *bio_ret = bio;
+ return 0;
+
+out_put_dnode:
+ f2fs_put_dnode(&dn);
+out:
+ for (i = 0; i < cc->cluster_size; i++) {
+ if (cc->rpages[i]) {
+ ClearPageUptodate(cc->rpages[i]);
+ ClearPageError(cc->rpages[i]);
+ unlock_page(cc->rpages[i]);
+ }
+ }
+ *bio_ret = bio;
+ return ret;
+}
+#endif
+
+/*
+ * This function was originally taken from fs/mpage.c, and customized for f2fs.
+ * Major change was from block_size == page_size in f2fs by default.
+ *
+ * Note that the aops->readpages() function is ONLY used for read-ahead. If
+ * this function ever deviates from doing just read-ahead, it should either
+ * use ->readpage() or do the necessary surgery to decouple ->readpages()
+ * from read-ahead.
+ */
+int f2fs_mpage_readpages(struct address_space *mapping,
+ struct list_head *pages, struct page *page,
+ unsigned nr_pages, bool is_readahead)
+{
+ struct bio *bio = NULL;
+ sector_t last_block_in_bio = 0;
+ struct inode *inode = mapping->host;
+ struct f2fs_map_blocks map;
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ struct compress_ctx cc = {
+ .inode = inode,
+ .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
+ .cluster_size = F2FS_I(inode)->i_cluster_size,
+ .cluster_idx = NULL_CLUSTER,
+ .rpages = NULL,
+ .cpages = NULL,
+ .nr_rpages = 0,
+ .nr_cpages = 0,
+ };
+#endif
+ unsigned max_nr_pages = nr_pages;
+ int ret = 0;
+ bool drop_ra = false;
+
+ /* this is real from f2fs_merkle_tree_readahead() in old kernel only. */
+ if (!nr_pages)
+ return 0;
+
+ map.m_pblk = 0;
+ map.m_lblk = 0;
+ map.m_len = 0;
+ map.m_flags = 0;
+ map.m_next_pgofs = NULL;
+ map.m_next_extent = NULL;
+ map.m_seg_type = NO_CHECK_TYPE;
+ map.m_may_create = false;
+
+ /*
+ * Two readahead threads for same address range can cause race condition
+ * which fragments sequential read IOs. So let's avoid each other.
+ */
+ if (pages && is_readahead) {
+ page = list_last_entry(pages, struct page, lru);
+ if (READ_ONCE(F2FS_I(inode)->ra_offset) == page_index(page))
+ drop_ra = true;
+ else
+ WRITE_ONCE(F2FS_I(inode)->ra_offset, page_index(page));
+ }
+
+ for (; nr_pages; nr_pages--) {
+ if (pages) {
+ page = list_last_entry(pages, struct page, lru);
+
+ prefetchw(&page->flags);
+ list_del(&page->lru);
+ if (drop_ra || add_to_page_cache_lru(page, mapping,
+ page_index(page),
+ readahead_gfp_mask(mapping)))
+ goto next_page;
+ }
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ if (f2fs_compressed_file(inode)) {
+ /* there are remained comressed pages, submit them */
+ if (!f2fs_cluster_can_merge_page(&cc, page->index)) {
+ ret = f2fs_read_multi_pages(&cc, &bio,
+ max_nr_pages,
+ &last_block_in_bio,
+ is_readahead, false);
+ f2fs_destroy_compress_ctx(&cc, false);
+ if (ret)
+ goto set_error_page;
+ }
+ ret = f2fs_is_compressed_cluster(inode, page->index);
+ if (ret < 0)
+ goto set_error_page;
+ else if (!ret)
+ goto read_single_page;
+
+ ret = f2fs_init_compress_ctx(&cc);
+ if (ret)
+ goto set_error_page;
+
+ f2fs_compress_ctx_add_page(&cc, page);
+
+ goto next_page;
+ }
+read_single_page:
+#endif
+
+ ret = f2fs_read_single_page(inode, page, max_nr_pages, &map,
+ &bio, &last_block_in_bio, is_readahead);
+ if (ret) {
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+set_error_page:
+#endif
+ SetPageError(page);
+ zero_user_segment(page, 0, PAGE_SIZE);
+ unlock_page(page);
+ }
+next_page:
+ if (pages)
+ put_page(page);
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ if (f2fs_compressed_file(inode)) {
+ /* last page */
+ if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {
+ ret = f2fs_read_multi_pages(&cc, &bio,
+ max_nr_pages,
+ &last_block_in_bio,
+ is_readahead, false);
+ f2fs_destroy_compress_ctx(&cc, false);
+ }
+ }
+#endif
+ }
+ BUG_ON(pages && !list_empty(pages));
+ if (bio)
+ __submit_bio(F2FS_I_SB(inode), bio, DATA);
+
+ if (pages && is_readahead && !drop_ra)
+ WRITE_ONCE(F2FS_I(inode)->ra_offset, -1);
+ return pages ? 0 : ret;
+}
+
+static int f2fs_read_data_page(struct file *file, struct page *page)
+{
+ struct inode *inode = page_file_mapping(page)->host;
+ int ret = -EAGAIN;
+
+ trace_f2fs_readpage(page, DATA);
+
+ if (!f2fs_is_compress_backend_ready(inode)) {
+ unlock_page(page);
+ return -EOPNOTSUPP;
+ }
+
+ /* If the file has inline data, try to read it directly */
+ if (f2fs_has_inline_data(inode))
+ ret = f2fs_read_inline_data(inode, page);
+ if (ret == -EAGAIN)
+ ret = f2fs_mpage_readpages(page_file_mapping(page),
+ NULL, page, 1, false);
+ return ret;
+}
+
+static int f2fs_read_data_pages(struct file *file,
+ struct address_space *mapping,
+ struct list_head *pages, unsigned nr_pages)
+{
+ struct inode *inode = mapping->host;
+ struct page *page = list_last_entry(pages, struct page, lru);
+
+ trace_f2fs_readpages(inode, page, nr_pages);
+
+ if (!f2fs_is_compress_backend_ready(inode))
+ return 0;
+
+ /* If the file has inline data, skip readpages */
+ if (f2fs_has_inline_data(inode))
+ return 0;
+
+ return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true);
+}
+
+int f2fs_encrypt_one_page(struct f2fs_io_info *fio)
+{
+ struct inode *inode = fio->page->mapping->host;
+ struct page *mpage, *page;
+ gfp_t gfp_flags = GFP_NOFS;
+
+ if (!f2fs_encrypted_file(inode))
+ return 0;
+
+ page = fio->compressed_page ? fio->compressed_page : fio->page;
+
+ /* wait for GCed page writeback via META_MAPPING */
+ f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
+
+ if (fscrypt_inode_uses_inline_crypto(inode))
+ return 0;
+
+retry_encrypt:
+ fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,
+ PAGE_SIZE, 0, gfp_flags);
+ if (IS_ERR(fio->encrypted_page)) {
+ /* flush pending IOs and wait for a while in the ENOMEM case */
+ if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
+ f2fs_flush_merged_writes(fio->sbi);
+ congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
+ gfp_flags |= __GFP_NOFAIL;
+ goto retry_encrypt;
+ }
+ return PTR_ERR(fio->encrypted_page);
+ }
+
+ mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
+ if (mpage) {
+ if (PageUptodate(mpage))
+ memcpy(page_address(mpage),
+ page_address(fio->encrypted_page), PAGE_SIZE);
+ f2fs_put_page(mpage, 1);
+ }
+ return 0;
+}
+
+static inline bool check_inplace_update_policy(struct inode *inode,
+ struct f2fs_io_info *fio)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ unsigned int policy = SM_I(sbi)->ipu_policy;
+
+ if (policy & (0x1 << F2FS_IPU_FORCE))
+ return true;
+ if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
+ return true;
+ if (policy & (0x1 << F2FS_IPU_UTIL) &&
+ utilization(sbi) > SM_I(sbi)->min_ipu_util)
+ return true;
+ if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
+ utilization(sbi) > SM_I(sbi)->min_ipu_util)
+ return true;
+
+ /*
+ * IPU for rewrite async pages
+ */
+ if (policy & (0x1 << F2FS_IPU_ASYNC) &&
+ fio && fio->op == REQ_OP_WRITE &&
+ !(fio->op_flags & REQ_SYNC) &&
+ !IS_ENCRYPTED(inode))
+ return true;
+
+ /* this is only set during fdatasync */
+ if (policy & (0x1 << F2FS_IPU_FSYNC) &&
+ is_inode_flag_set(inode, FI_NEED_IPU))
+ return true;
+
+ if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
+ !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
+ return true;
+
+ return false;
+}
+
+bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
+{
+ /* swap file is migrating in aligned write mode */
+ if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))
+ return false;
+
+ if (f2fs_is_pinned_file(inode))
+ return true;
+
+ /* if this is cold file, we should overwrite to avoid fragmentation */
+ if (file_is_cold(inode))
+ return true;
+
+ return check_inplace_update_policy(inode, fio);
+}
+
+bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ if (f2fs_lfs_mode(sbi))
+ return true;
+ if (S_ISDIR(inode->i_mode))
+ return true;
+ if (IS_NOQUOTA(inode))
+ return true;
+ if (f2fs_is_atomic_file(inode))
+ return true;
+ if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
+ return true;
+
+ /* swap file is migrating in aligned write mode */
+ if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))
+ return true;
+
+ if (fio) {
+ if (page_private_gcing(fio->page))
+ return true;
+ if (page_private_dummy(fio->page))
+ return true;
+ if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
+ f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
+ return true;
+ }
+ return false;
+}
+
+static inline bool need_inplace_update(struct f2fs_io_info *fio)
+{
+ struct inode *inode = fio->page->mapping->host;
+
+ if (f2fs_should_update_outplace(inode, fio))
+ return false;
+
+ return f2fs_should_update_inplace(inode, fio);
+}
+
+int f2fs_do_write_data_page(struct f2fs_io_info *fio)
+{
+ struct page *page = fio->page;
+ struct inode *inode = page->mapping->host;
+ struct dnode_of_data dn;
+ struct extent_info ei = {0,0,0};
+ struct node_info ni;
+ bool ipu_force = false;
+ int err = 0;
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ if (need_inplace_update(fio) &&
+ f2fs_lookup_extent_cache(inode, page->index, &ei)) {
+ fio->old_blkaddr = ei.blk + page->index - ei.fofs;
+
+ if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
+ DATA_GENERIC_ENHANCE))
+ return -EFSCORRUPTED;
+
+ ipu_force = true;
+ fio->need_lock = LOCK_DONE;
+ goto got_it;
+ }
+
+ /* Deadlock due to between page->lock and f2fs_lock_op */
+ if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
+ return -EAGAIN;
+
+ err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
+ if (err)
+ goto out;
+
+ fio->old_blkaddr = dn.data_blkaddr;
+
+ /* This page is already truncated */
+ if (fio->old_blkaddr == NULL_ADDR) {
+ ClearPageUptodate(page);
+ clear_page_private_gcing(page);
+ goto out_writepage;
+ }
+got_it:
+ if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
+ !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
+ DATA_GENERIC_ENHANCE)) {
+ err = -EFSCORRUPTED;
+ goto out_writepage;
+ }
+ /*
+ * If current allocation needs SSR,
+ * it had better in-place writes for updated data.
+ */
+ if (ipu_force ||
+ (__is_valid_data_blkaddr(fio->old_blkaddr) &&
+ need_inplace_update(fio))) {
+ err = f2fs_encrypt_one_page(fio);
+ if (err)
+ goto out_writepage;
+
+ set_page_writeback(page);
+ ClearPageError(page);
+ f2fs_put_dnode(&dn);
+ if (fio->need_lock == LOCK_REQ)
+ f2fs_unlock_op(fio->sbi);
+ err = f2fs_inplace_write_data(fio);
+ if (err) {
+ if (fscrypt_inode_uses_fs_layer_crypto(inode))
+ fscrypt_finalize_bounce_page(&fio->encrypted_page);
+ if (PageWriteback(page))
+ end_page_writeback(page);
+ } else {
+ set_inode_flag(inode, FI_UPDATE_WRITE);
+ }
+ trace_f2fs_do_write_data_page(fio->page, IPU);
+ return err;
+ }
+
+ if (fio->need_lock == LOCK_RETRY) {
+ if (!f2fs_trylock_op(fio->sbi)) {
+ err = -EAGAIN;
+ goto out_writepage;
+ }
+ fio->need_lock = LOCK_REQ;
+ }
+
+ err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
+ if (err)
+ goto out_writepage;
+
+ fio->version = ni.version;
+
+ err = f2fs_encrypt_one_page(fio);
+ if (err)
+ goto out_writepage;
+
+ set_page_writeback(page);
+ ClearPageError(page);
+
+ if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)
+ f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);
+
+ /* LFS mode write path */
+ f2fs_outplace_write_data(&dn, fio);
+ trace_f2fs_do_write_data_page(page, OPU);
+ set_inode_flag(inode, FI_APPEND_WRITE);
+ if (page->index == 0)
+ set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
+out_writepage:
+ f2fs_put_dnode(&dn);
+out:
+ if (fio->need_lock == LOCK_REQ)
+ f2fs_unlock_op(fio->sbi);
+ return err;
+}
+
+int f2fs_write_single_data_page(struct page *page, int *submitted,
+ struct bio **bio,
+ sector_t *last_block,
+ struct writeback_control *wbc,
+ enum iostat_type io_type,
+ int compr_blocks,
+ bool allow_balance)
+{
+ struct inode *inode = page->mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ loff_t i_size = i_size_read(inode);
+ const pgoff_t end_index = ((unsigned long long)i_size)
+ >> PAGE_SHIFT;
+ loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
+ unsigned offset = 0;
+ bool need_balance_fs = false;
+ int err = 0;
+ struct f2fs_io_info fio = {
+ .sbi = sbi,
+ .ino = inode->i_ino,
+ .type = DATA,
+ .op = REQ_OP_WRITE,
+ .op_flags = wbc_to_write_flags(wbc),
+ .old_blkaddr = NULL_ADDR,
+ .page = page,
+ .encrypted_page = NULL,
+ .submitted = false,
+ .compr_blocks = compr_blocks,
+ .need_lock = LOCK_RETRY,
+ .io_type = io_type,
+ .io_wbc = wbc,
+ .bio = bio,
+ .last_block = last_block,
+ };
+
+ trace_f2fs_writepage(page, DATA);
+
+ /* we should bypass data pages to proceed the kworkder jobs */
+ if (unlikely(f2fs_cp_error(sbi))) {
+ mapping_set_error(page->mapping, -EIO);
+ /*
+ * don't drop any dirty dentry pages for keeping lastest
+ * directory structure.
+ */
+ if (S_ISDIR(inode->i_mode) &&
+ !is_sbi_flag_set(sbi, SBI_IS_CLOSE))
+ goto redirty_out;
+ goto out;
+ }
+
+ if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+ goto redirty_out;
+
+ if (page->index < end_index ||
+ f2fs_verity_in_progress(inode) ||
+ compr_blocks)
+ goto write;
+
+ /*
+ * If the offset is out-of-range of file size,
+ * this page does not have to be written to disk.
+ */
+ offset = i_size & (PAGE_SIZE - 1);
+ if ((page->index >= end_index + 1) || !offset)
+ goto out;
+
+ zero_user_segment(page, offset, PAGE_SIZE);
+write:
+ if (f2fs_is_drop_cache(inode))
+ goto out;
+ /* we should not write 0'th page having journal header */
+ if (f2fs_is_volatile_file(inode) && (!page->index ||
+ (!wbc->for_reclaim &&
+ f2fs_available_free_memory(sbi, BASE_CHECK))))
+ goto redirty_out;
+
+ /* Dentry/quota blocks are controlled by checkpoint */
+ if (S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) {
+ /*
+ * We need to wait for node_write to avoid block allocation during
+ * checkpoint. This can only happen to quota writes which can cause
+ * the below discard race condition.
+ */
+ if (IS_NOQUOTA(inode))
+ down_read(&sbi->node_write);
+
+ fio.need_lock = LOCK_DONE;
+ err = f2fs_do_write_data_page(&fio);
+
+ if (IS_NOQUOTA(inode))
+ up_read(&sbi->node_write);
+
+ goto done;
+ }
+
+ if (!wbc->for_reclaim)
+ need_balance_fs = true;
+ else if (has_not_enough_free_secs(sbi, 0, 0))
+ goto redirty_out;
+ else
+ set_inode_flag(inode, FI_HOT_DATA);
+
+ err = -EAGAIN;
+ if (f2fs_has_inline_data(inode)) {
+ err = f2fs_write_inline_data(inode, page);
+ if (!err)
+ goto out;
+ }
+
+ if (err == -EAGAIN) {
+ err = f2fs_do_write_data_page(&fio);
+ if (err == -EAGAIN) {
+ fio.need_lock = LOCK_REQ;
+ err = f2fs_do_write_data_page(&fio);
+ }
+ }
+
+ if (err) {
+ file_set_keep_isize(inode);
+ } else {
+ spin_lock(&F2FS_I(inode)->i_size_lock);
+ if (F2FS_I(inode)->last_disk_size < psize)
+ F2FS_I(inode)->last_disk_size = psize;
+ spin_unlock(&F2FS_I(inode)->i_size_lock);
+ }
+
+done:
+ if (err && err != -ENOENT)
+ goto redirty_out;
+
+out:
+ inode_dec_dirty_pages(inode);
+ if (err) {
+ ClearPageUptodate(page);
+ clear_page_private_gcing(page);
+ }
+
+ if (wbc->for_reclaim) {
+ f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
+ clear_inode_flag(inode, FI_HOT_DATA);
+ f2fs_remove_dirty_inode(inode);
+ submitted = NULL;
+ }
+ unlock_page(page);
+ if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
+ !F2FS_I(inode)->cp_task && allow_balance)
+ f2fs_balance_fs(sbi, need_balance_fs);
+
+ if (unlikely(f2fs_cp_error(sbi))) {
+ f2fs_submit_merged_write(sbi, DATA);
+ f2fs_submit_merged_ipu_write(sbi, bio, NULL);
+ submitted = NULL;
+ }
+
+ if (submitted)
+ *submitted = fio.submitted ? 1 : 0;
+
+ return 0;
+
+redirty_out:
+ redirty_page_for_writepage(wbc, page);
+ /*
+ * pageout() in MM traslates EAGAIN, so calls handle_write_error()
+ * -> mapping_set_error() -> set_bit(AS_EIO, ...).
+ * file_write_and_wait_range() will see EIO error, which is critical
+ * to return value of fsync() followed by atomic_write failure to user.
+ */
+ if (!err || wbc->for_reclaim)
+ return AOP_WRITEPAGE_ACTIVATE;
+ unlock_page(page);
+ return err;
+}
+
+static int f2fs_write_data_page(struct page *page,
+ struct writeback_control *wbc)
+{
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ struct inode *inode = page->mapping->host;
+
+ if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
+ goto out;
+
+ if (f2fs_compressed_file(inode)) {
+ if (f2fs_is_compressed_cluster(inode, page->index)) {
+ redirty_page_for_writepage(wbc, page);
+ return AOP_WRITEPAGE_ACTIVATE;
+ }
+ }
+out:
+#endif
+
+ return f2fs_write_single_data_page(page, NULL, NULL, NULL,
+ wbc, FS_DATA_IO, 0, true);
+}
+
+/*
+ * This function was copied from write_cche_pages from mm/page-writeback.c.
+ * The major change is making write step of cold data page separately from
+ * warm/hot data page.
+ */
+static int f2fs_write_cache_pages(struct address_space *mapping,
+ struct writeback_control *wbc,
+ enum iostat_type io_type)
+{
+ int ret = 0;
+ int done = 0, retry = 0;
+ struct pagevec pvec;
+ struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
+ struct bio *bio = NULL;
+ sector_t last_block;
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ struct inode *inode = mapping->host;
+ struct compress_ctx cc = {
+ .inode = inode,
+ .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
+ .cluster_size = F2FS_I(inode)->i_cluster_size,
+ .cluster_idx = NULL_CLUSTER,
+ .rpages = NULL,
+ .nr_rpages = 0,
+ .cpages = NULL,
+ .rbuf = NULL,
+ .cbuf = NULL,
+ .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,
+ .private = NULL,
+ };
+#endif
+ int nr_pages;
+ pgoff_t uninitialized_var(writeback_index);
+ pgoff_t index;
+ pgoff_t end; /* Inclusive */
+ pgoff_t done_index;
+ int range_whole = 0;
+ xa_mark_t tag;
+ int nwritten = 0;
+ int submitted = 0;
+ int i;
+
+ pagevec_init(&pvec);
+
+ if (get_dirty_pages(mapping->host) <=
+ SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
+ set_inode_flag(mapping->host, FI_HOT_DATA);
+ else
+ clear_inode_flag(mapping->host, FI_HOT_DATA);
+
+ if (wbc->range_cyclic) {
+ writeback_index = mapping->writeback_index; /* prev offset */
+ index = writeback_index;
+ end = -1;
+ } else {
+ index = wbc->range_start >> PAGE_SHIFT;
+ end = wbc->range_end >> PAGE_SHIFT;
+ if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
+ range_whole = 1;
+ }
+ if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
+ tag = PAGECACHE_TAG_TOWRITE;
+ else
+ tag = PAGECACHE_TAG_DIRTY;
+retry:
+ retry = 0;
+ if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
+ tag_pages_for_writeback(mapping, index, end);
+ done_index = index;
+ while (!done && !retry && (index <= end)) {
+ nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
+ tag);
+ if (nr_pages == 0)
+ break;
+
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+ bool need_readd;
+readd:
+ need_readd = false;
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ if (f2fs_compressed_file(inode)) {
+ ret = f2fs_init_compress_ctx(&cc);
+ if (ret) {
+ done = 1;
+ break;
+ }
+
+ if (!f2fs_cluster_can_merge_page(&cc,
+ page->index)) {
+ ret = f2fs_write_multi_pages(&cc,
+ &submitted, wbc, io_type);
+ if (!ret)
+ need_readd = true;
+ goto result;
+ }
+
+ if (unlikely(f2fs_cp_error(sbi)))
+ goto lock_page;
+
+ if (f2fs_cluster_is_empty(&cc)) {
+ void *fsdata = NULL;
+ struct page *pagep;
+ int ret2;
+
+ ret2 = f2fs_prepare_compress_overwrite(
+ inode, &pagep,
+ page->index, &fsdata);
+ if (ret2 < 0) {
+ ret = ret2;
+ done = 1;
+ break;
+ } else if (ret2 &&
+ !f2fs_compress_write_end(inode,
+ fsdata, page->index,
+ 1)) {
+ retry = 1;
+ break;
+ }
+ } else {
+ goto lock_page;
+ }
+ }
+#endif
+ /* give a priority to WB_SYNC threads */
+ if (atomic_read(&sbi->wb_sync_req[DATA]) &&
+ wbc->sync_mode == WB_SYNC_NONE) {
+ done = 1;
+ break;
+ }
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+lock_page:
+#endif
+ done_index = page->index;
+retry_write:
+ lock_page(page);
+
+ if (unlikely(page->mapping != mapping)) {
+continue_unlock:
+ unlock_page(page);
+ continue;
+ }
+
+ if (!PageDirty(page)) {
+ /* someone wrote it for us */
+ goto continue_unlock;
+ }
+
+ if (PageWriteback(page)) {
+ if (wbc->sync_mode != WB_SYNC_NONE)
+ f2fs_wait_on_page_writeback(page,
+ DATA, true, true);
+ else
+ goto continue_unlock;
+ }
+
+ if (!clear_page_dirty_for_io(page))
+ goto continue_unlock;
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ if (f2fs_compressed_file(inode)) {
+ get_page(page);
+ f2fs_compress_ctx_add_page(&cc, page);
+ continue;
+ }
+#endif
+ ret = f2fs_write_single_data_page(page, &submitted,
+ &bio, &last_block, wbc, io_type,
+ 0, true);
+ if (ret == AOP_WRITEPAGE_ACTIVATE)
+ unlock_page(page);
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+result:
+#endif
+ nwritten += submitted;
+ wbc->nr_to_write -= submitted;
+
+ if (unlikely(ret)) {
+ /*
+ * keep nr_to_write, since vfs uses this to
+ * get # of written pages.
+ */
+ if (ret == AOP_WRITEPAGE_ACTIVATE) {
+ ret = 0;
+ goto next;
+ } else if (ret == -EAGAIN) {
+ ret = 0;
+ if (wbc->sync_mode == WB_SYNC_ALL) {
+ cond_resched();
+ congestion_wait(BLK_RW_ASYNC,
+ DEFAULT_IO_TIMEOUT);
+ goto retry_write;
+ }
+ goto next;
+ }
+ done_index = page->index + 1;
+ done = 1;
+ break;
+ }
+
+ if (wbc->nr_to_write <= 0 &&
+ wbc->sync_mode == WB_SYNC_NONE) {
+ done = 1;
+ break;
+ }
+next:
+ if (need_readd)
+ goto readd;
+ }
+ pagevec_release(&pvec);
+ cond_resched();
+ }
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ /* flush remained pages in compress cluster */
+ if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {
+ ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);
+ nwritten += submitted;
+ wbc->nr_to_write -= submitted;
+ if (ret) {
+ done = 1;
+ retry = 0;
+ }
+ }
+ if (f2fs_compressed_file(inode))
+ f2fs_destroy_compress_ctx(&cc, false);
+#endif
+ if (retry) {
+ index = 0;
+ end = -1;
+ goto retry;
+ }
+ if (wbc->range_cyclic && !done)
+ done_index = 0;
+ if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
+ mapping->writeback_index = done_index;
+
+ if (nwritten)
+ f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
+ NULL, 0, DATA);
+ /* submit cached bio of IPU write */
+ if (bio)
+ f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
+
+ return ret;
+}
+
+static inline bool __should_serialize_io(struct inode *inode,
+ struct writeback_control *wbc)
+{
+ /* to avoid deadlock in path of data flush */
+ if (F2FS_I(inode)->cp_task)
+ return false;
+
+ if (!S_ISREG(inode->i_mode))
+ return false;
+ if (IS_NOQUOTA(inode))
+ return false;
+
+ if (f2fs_need_compress_data(inode))
+ return true;
+ if (wbc->sync_mode != WB_SYNC_ALL)
+ return true;
+ if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
+ return true;
+ return false;
+}
+
+static int __f2fs_write_data_pages(struct address_space *mapping,
+ struct writeback_control *wbc,
+ enum iostat_type io_type)
+{
+ struct inode *inode = mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct blk_plug plug;
+ int ret;
+ bool locked = false;
+
+ /* deal with chardevs and other special file */
+ if (!mapping->a_ops->writepage)
+ return 0;
+
+ /* skip writing if there is no dirty page in this inode */
+ if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
+ return 0;
+
+ /* during POR, we don't need to trigger writepage at all. */
+ if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+ goto skip_write;
+
+ if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
+ wbc->sync_mode == WB_SYNC_NONE &&
+ get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
+ f2fs_available_free_memory(sbi, DIRTY_DENTS))
+ goto skip_write;
+
+ /* skip writing during file defragment */
+ if (is_inode_flag_set(inode, FI_DO_DEFRAG))
+ goto skip_write;
+
+ trace_f2fs_writepages(mapping->host, wbc, DATA);
+
+ /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
+ if (wbc->sync_mode == WB_SYNC_ALL)
+ atomic_inc(&sbi->wb_sync_req[DATA]);
+ else if (atomic_read(&sbi->wb_sync_req[DATA])) {
+ /* to avoid potential deadlock */
+ if (current->plug)
+ blk_finish_plug(current->plug);
+ goto skip_write;
+ }
+
+ if (__should_serialize_io(inode, wbc)) {
+ mutex_lock(&sbi->writepages);
+ locked = true;
+ }
+
+ blk_start_plug(&plug);
+ ret = f2fs_write_cache_pages(mapping, wbc, io_type);
+ blk_finish_plug(&plug);
+
+ if (locked)
+ mutex_unlock(&sbi->writepages);
+
+ if (wbc->sync_mode == WB_SYNC_ALL)
+ atomic_dec(&sbi->wb_sync_req[DATA]);
+ /*
+ * if some pages were truncated, we cannot guarantee its mapping->host
+ * to detect pending bios.
+ */
+
+ f2fs_remove_dirty_inode(inode);
+ return ret;
+
+skip_write:
+ wbc->pages_skipped += get_dirty_pages(inode);
+ trace_f2fs_writepages(mapping->host, wbc, DATA);
+ return 0;
+}
+
+static int f2fs_write_data_pages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ struct inode *inode = mapping->host;
+
+ return __f2fs_write_data_pages(mapping, wbc,
+ F2FS_I(inode)->cp_task == current ?
+ FS_CP_DATA_IO : FS_DATA_IO);
+}
+
+static void f2fs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+ loff_t i_size = i_size_read(inode);
+
+ if (IS_NOQUOTA(inode))
+ return;
+
+ /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
+ if (to > i_size && !f2fs_verity_in_progress(inode)) {
+ down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+ down_write(&F2FS_I(inode)->i_mmap_sem);
+
+ truncate_pagecache(inode, i_size);
+ f2fs_truncate_blocks(inode, i_size, true);
+
+ up_write(&F2FS_I(inode)->i_mmap_sem);
+ up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+ }
+}
+
+static int prepare_write_begin(struct f2fs_sb_info *sbi,
+ struct page *page, loff_t pos, unsigned len,
+ block_t *blk_addr, bool *node_changed)
+{
+ struct inode *inode = page->mapping->host;
+ pgoff_t index = page->index;
+ struct dnode_of_data dn;
+ struct page *ipage;
+ bool locked = false;
+ struct extent_info ei = {0,0,0};
+ int err = 0;
+ int flag;
+
+ /*
+ * we already allocated all the blocks, so we don't need to get
+ * the block addresses when there is no need to fill the page.
+ */
+ if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
+ !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
+ !f2fs_verity_in_progress(inode))
+ return 0;
+
+ /* f2fs_lock_op avoids race between write CP and convert_inline_page */
+ if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
+ flag = F2FS_GET_BLOCK_DEFAULT;
+ else
+ flag = F2FS_GET_BLOCK_PRE_AIO;
+
+ if (f2fs_has_inline_data(inode) ||
+ (pos & PAGE_MASK) >= i_size_read(inode)) {
+ f2fs_do_map_lock(sbi, flag, true);
+ locked = true;
+ }
+
+restart:
+ /* check inline_data */
+ ipage = f2fs_get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(ipage)) {
+ err = PTR_ERR(ipage);
+ goto unlock_out;
+ }
+
+ set_new_dnode(&dn, inode, ipage, ipage, 0);
+
+ if (f2fs_has_inline_data(inode)) {
+ if (pos + len <= MAX_INLINE_DATA(inode)) {
+ f2fs_do_read_inline_data(page, ipage);
+ set_inode_flag(inode, FI_DATA_EXIST);
+ if (inode->i_nlink)
+ set_page_private_inline(ipage);
+ } else {
+ err = f2fs_convert_inline_page(&dn, page);
+ if (err)
+ goto out;
+ if (dn.data_blkaddr == NULL_ADDR)
+ err = f2fs_get_block(&dn, index);
+ }
+ } else if (locked) {
+ err = f2fs_get_block(&dn, index);
+ } else {
+ if (f2fs_lookup_extent_cache(inode, index, &ei)) {
+ dn.data_blkaddr = ei.blk + index - ei.fofs;
+ } else {
+ /* hole case */
+ err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
+ if (err || dn.data_blkaddr == NULL_ADDR) {
+ f2fs_put_dnode(&dn);
+ f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
+ true);
+ WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
+ locked = true;
+ goto restart;
+ }
+ }
+ }
+
+ /* convert_inline_page can make node_changed */
+ *blk_addr = dn.data_blkaddr;
+ *node_changed = dn.node_changed;
+out:
+ f2fs_put_dnode(&dn);
+unlock_out:
+ if (locked)
+ f2fs_do_map_lock(sbi, flag, false);
+ return err;
+}
+
+static int f2fs_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
+{
+ struct inode *inode = mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct page *page = NULL;
+ pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
+ bool need_balance = false, drop_atomic = false;
+ block_t blkaddr = NULL_ADDR;
+ int err = 0;
+
+ /*
+ * Should avoid quota operations which can make deadlock:
+ * kswapd -> f2fs_evict_inode -> dquot_drop ->
+ * f2fs_dquot_commit -> f2fs_write_begin ->
+ * d_obtain_alias -> __d_alloc -> kmem_cache_alloc(GFP_KERNEL)
+ */
+ if (trace_android_fs_datawrite_start_enabled() && !IS_NOQUOTA(inode)) {
+ char *path, pathbuf[MAX_TRACE_PATHBUF_LEN];
+
+ path = android_fstrace_get_pathname(pathbuf,
+ MAX_TRACE_PATHBUF_LEN,
+ inode);
+ trace_android_fs_datawrite_start(inode, pos, len,
+ current->pid, path,
+ current->comm);
+ }
+ trace_f2fs_write_begin(inode, pos, len, flags);
+
+ if (!f2fs_is_checkpoint_ready(sbi)) {
+ err = -ENOSPC;
+ goto fail;
+ }
+
+ if ((f2fs_is_atomic_file(inode) &&
+ !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
+ is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
+ err = -ENOMEM;
+ drop_atomic = true;
+ goto fail;
+ }
+
+ /*
+ * We should check this at this moment to avoid deadlock on inode page
+ * and #0 page. The locking rule for inline_data conversion should be:
+ * lock_page(page #0) -> lock_page(inode_page)
+ */
+ if (index != 0) {
+ err = f2fs_convert_inline_inode(inode);
+ if (err)
+ goto fail;
+ }
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ if (f2fs_compressed_file(inode)) {
+ int ret;
+
+ *fsdata = NULL;
+
+ ret = f2fs_prepare_compress_overwrite(inode, pagep,
+ index, fsdata);
+ if (ret < 0) {
+ err = ret;
+ goto fail;
+ } else if (ret) {
+ return 0;
+ }
+ }
+#endif
+
+repeat:
+ /*
+ * Do not use grab_cache_page_write_begin() to avoid deadlock due to
+ * wait_for_stable_page. Will wait that below with our IO control.
+ */
+ page = f2fs_pagecache_get_page(mapping, index,
+ FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
+ if (!page) {
+ err = -ENOMEM;
+ goto fail;
+ }
+
+ /* TODO: cluster can be compressed due to race with .writepage */
+
+ *pagep = page;
+
+ err = prepare_write_begin(sbi, page, pos, len,
+ &blkaddr, &need_balance);
+ if (err)
+ goto fail;
+
+ if (need_balance && !IS_NOQUOTA(inode) &&
+ has_not_enough_free_secs(sbi, 0, 0)) {
+ unlock_page(page);
+ f2fs_balance_fs(sbi, true);
+ lock_page(page);
+ if (page->mapping != mapping) {
+ /* The page got truncated from under us */
+ f2fs_put_page(page, 1);
+ goto repeat;
+ }
+ }
+
+ f2fs_wait_on_page_writeback(page, DATA, false, true);
+
+ if (len == PAGE_SIZE || PageUptodate(page))
+ return 0;
+
+ if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
+ !f2fs_verity_in_progress(inode)) {
+ zero_user_segment(page, len, PAGE_SIZE);
+ return 0;
+ }
+
+ if (blkaddr == NEW_ADDR) {
+ zero_user_segment(page, 0, PAGE_SIZE);
+ SetPageUptodate(page);
+ } else {
+ if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
+ DATA_GENERIC_ENHANCE_READ)) {
+ err = -EFSCORRUPTED;
+ goto fail;
+ }
+ err = f2fs_submit_page_read(inode, page, blkaddr, 0, true);
+ if (err)
+ goto fail;
+
+ lock_page(page);
+ if (unlikely(page->mapping != mapping)) {
+ f2fs_put_page(page, 1);
+ goto repeat;
+ }
+ if (unlikely(!PageUptodate(page))) {
+ err = -EIO;
+ goto fail;
+ }
+ }
+ return 0;
+
+fail:
+ f2fs_put_page(page, 1);
+ f2fs_write_failed(mapping, pos + len);
+ if (drop_atomic)
+ f2fs_drop_inmem_pages_all(sbi, false);
+ return err;
+}
+
+static int f2fs_write_end(struct file *file,
+ struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata)
+{
+ struct inode *inode = page->mapping->host;
+
+ trace_android_fs_datawrite_end(inode, pos, len);
+ trace_f2fs_write_end(inode, pos, len, copied);
+
+ /*
+ * This should be come from len == PAGE_SIZE, and we expect copied
+ * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
+ * let generic_perform_write() try to copy data again through copied=0.
+ */
+ if (!PageUptodate(page)) {
+ if (unlikely(copied != len))
+ copied = 0;
+ else
+ SetPageUptodate(page);
+ }
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ /* overwrite compressed file */
+ if (f2fs_compressed_file(inode) && fsdata) {
+ f2fs_compress_write_end(inode, fsdata, page->index, copied);
+ f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+
+ if (pos + copied > i_size_read(inode) &&
+ !f2fs_verity_in_progress(inode))
+ f2fs_i_size_write(inode, pos + copied);
+ return copied;
+ }
+#endif
+
+ if (!copied)
+ goto unlock_out;
+
+ set_page_dirty(page);
+
+ if (pos + copied > i_size_read(inode) &&
+ !f2fs_verity_in_progress(inode))
+ f2fs_i_size_write(inode, pos + copied);
+unlock_out:
+ f2fs_put_page(page, 1);
+ f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+ return copied;
+}
+
+static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
+ loff_t offset)
+{
+ unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
+ unsigned blkbits = i_blkbits;
+ unsigned blocksize_mask = (1 << blkbits) - 1;
+ unsigned long align = offset | iov_iter_alignment(iter);
+ struct block_device *bdev = inode->i_sb->s_bdev;
+
+ if (iov_iter_rw(iter) == READ && offset >= i_size_read(inode))
+ return 1;
+
+ if (align & blocksize_mask) {
+ if (bdev)
+ blkbits = blksize_bits(bdev_logical_block_size(bdev));
+ blocksize_mask = (1 << blkbits) - 1;
+ if (align & blocksize_mask)
+ return -EINVAL;
+ return 1;
+ }
+ return 0;
+}
+
+static void f2fs_dio_end_io(struct bio *bio)
+{
+ struct f2fs_private_dio *dio = bio->bi_private;
+
+ dec_page_count(F2FS_I_SB(dio->inode),
+ dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
+
+ bio->bi_private = dio->orig_private;
+ bio->bi_end_io = dio->orig_end_io;
+
+ kfree(dio);
+
+ bio_endio(bio);
+}
+
+static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
+ loff_t file_offset)
+{
+ struct f2fs_private_dio *dio;
+ bool write = (bio_op(bio) == REQ_OP_WRITE);
+
+ dio = f2fs_kzalloc(F2FS_I_SB(inode),
+ sizeof(struct f2fs_private_dio), GFP_NOFS);
+ if (!dio)
+ goto out;
+
+ dio->inode = inode;
+ dio->orig_end_io = bio->bi_end_io;
+ dio->orig_private = bio->bi_private;
+ dio->write = write;
+
+ bio->bi_end_io = f2fs_dio_end_io;
+ bio->bi_private = dio;
+
+ inc_page_count(F2FS_I_SB(inode),
+ write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
+
+ submit_bio(bio);
+ return;
+out:
+ bio->bi_status = BLK_STS_IOERR;
+ bio_endio(bio);
+}
+
+static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
+{
+ struct address_space *mapping = iocb->ki_filp->f_mapping;
+ struct inode *inode = mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ size_t count = iov_iter_count(iter);
+ loff_t offset = iocb->ki_pos;
+ int rw = iov_iter_rw(iter);
+ int err;
+ enum rw_hint hint = iocb->ki_hint;
+ int whint_mode = F2FS_OPTION(sbi).whint_mode;
+ bool do_opu;
+
+ err = check_direct_IO(inode, iter, offset);
+ if (err)
+ return err < 0 ? err : 0;
+
+ if (f2fs_force_buffered_io(inode, iocb, iter))
+ return 0;
+
+ do_opu = allow_outplace_dio(inode, iocb, iter);
+
+ trace_f2fs_direct_IO_enter(inode, offset, count, rw);
+
+ if (trace_android_fs_dataread_start_enabled() &&
+ (rw == READ)) {
+ char *path, pathbuf[MAX_TRACE_PATHBUF_LEN];
+
+ path = android_fstrace_get_pathname(pathbuf,
+ MAX_TRACE_PATHBUF_LEN,
+ inode);
+ trace_android_fs_dataread_start(inode, offset,
+ count, current->pid, path,
+ current->comm);
+ }
+ if (trace_android_fs_datawrite_start_enabled() &&
+ (rw == WRITE)) {
+ char *path, pathbuf[MAX_TRACE_PATHBUF_LEN];
+
+ path = android_fstrace_get_pathname(pathbuf,
+ MAX_TRACE_PATHBUF_LEN,
+ inode);
+ trace_android_fs_datawrite_start(inode, offset, count,
+ current->pid, path,
+ current->comm);
+ }
+
+ if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
+ iocb->ki_hint = WRITE_LIFE_NOT_SET;
+
+ if (iocb->ki_flags & IOCB_NOWAIT) {
+ if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
+ iocb->ki_hint = hint;
+ err = -EAGAIN;
+ goto out;
+ }
+ if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
+ up_read(&fi->i_gc_rwsem[rw]);
+ iocb->ki_hint = hint;
+ err = -EAGAIN;
+ goto out;
+ }
+ } else {
+ down_read(&fi->i_gc_rwsem[rw]);
+ if (do_opu)
+ down_read(&fi->i_gc_rwsem[READ]);
+ }
+
+ err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
+ iter, rw == WRITE ? get_data_block_dio_write :
+ get_data_block_dio, NULL, f2fs_dio_submit_bio,
+ rw == WRITE ? DIO_LOCKING | DIO_SKIP_HOLES :
+ DIO_SKIP_HOLES);
+
+ if (do_opu)
+ up_read(&fi->i_gc_rwsem[READ]);
+
+ up_read(&fi->i_gc_rwsem[rw]);
+
+ if (rw == WRITE) {
+ if (whint_mode == WHINT_MODE_OFF)
+ iocb->ki_hint = hint;
+ if (err > 0) {
+ f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
+ err);
+ if (!do_opu)
+ set_inode_flag(inode, FI_UPDATE_WRITE);
+ } else if (err == -EIOCBQUEUED) {
+ f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
+ count - iov_iter_count(iter));
+ } else if (err < 0) {
+ f2fs_write_failed(mapping, offset + count);
+ }
+ } else {
+ if (err > 0)
+ f2fs_update_iostat(sbi, APP_DIRECT_READ_IO, err);
+ else if (err == -EIOCBQUEUED)
+ f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_READ_IO,
+ count - iov_iter_count(iter));
+ }
+
+out:
+ if (trace_android_fs_dataread_start_enabled() &&
+ (rw == READ))
+ trace_android_fs_dataread_end(inode, offset, count);
+ if (trace_android_fs_datawrite_start_enabled() &&
+ (rw == WRITE))
+ trace_android_fs_datawrite_end(inode, offset, count);
+
+ trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
+
+ return err;
+}
+
+void f2fs_invalidate_page(struct page *page, unsigned int offset,
+ unsigned int length)
+{
+ struct inode *inode = page->mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
+ (offset % PAGE_SIZE || length != PAGE_SIZE))
+ return;
+
+ if (PageDirty(page)) {
+ if (inode->i_ino == F2FS_META_INO(sbi)) {
+ dec_page_count(sbi, F2FS_DIRTY_META);
+ } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
+ dec_page_count(sbi, F2FS_DIRTY_NODES);
+ } else {
+ inode_dec_dirty_pages(inode);
+ f2fs_remove_dirty_inode(inode);
+ }
+ }
+
+ clear_page_private_gcing(page);
+
+ if (test_opt(sbi, COMPRESS_CACHE)) {
+ if (f2fs_compressed_file(inode))
+ f2fs_invalidate_compress_pages(sbi, inode->i_ino);
+ if (inode->i_ino == F2FS_COMPRESS_INO(sbi))
+ clear_page_private_data(page);
+ }
+
+ if (page_private_atomic(page))
+ return f2fs_drop_inmem_page(inode, page);
+
+ detach_page_private(page);
+ set_page_private(page, 0);
+}
+
+int f2fs_release_page(struct page *page, gfp_t wait)
+{
+ /* If this is dirty page, keep PagePrivate */
+ if (PageDirty(page))
+ return 0;
+
+ /* This is atomic written page, keep Private */
+ if (page_private_atomic(page))
+ return 0;
+
+ if (test_opt(F2FS_P_SB(page), COMPRESS_CACHE)) {
+ struct f2fs_sb_info *sbi = F2FS_P_SB(page);
+ struct inode *inode = page->mapping->host;
+
+ if (f2fs_compressed_file(inode))
+ f2fs_invalidate_compress_pages(sbi, inode->i_ino);
+ if (inode->i_ino == F2FS_COMPRESS_INO(sbi))
+ clear_page_private_data(page);
+ }
+
+ clear_page_private_gcing(page);
+
+ detach_page_private(page);
+ set_page_private(page, 0);
+ return 1;
+}
+
+static int f2fs_set_data_page_dirty(struct page *page)
+{
+ struct inode *inode = page_file_mapping(page)->host;
+
+ trace_f2fs_set_page_dirty(page, DATA);
+
+ if (!PageUptodate(page))
+ SetPageUptodate(page);
+ if (PageSwapCache(page))
+ return __set_page_dirty_nobuffers(page);
+
+ if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
+ if (!page_private_atomic(page)) {
+ f2fs_register_inmem_page(inode, page);
+ return 1;
+ }
+ /*
+ * Previously, this page has been registered, we just
+ * return here.
+ */
+ return 0;
+ }
+
+ if (!PageDirty(page)) {
+ __set_page_dirty_nobuffers(page);
+ f2fs_update_dirty_page(inode, page);
+ return 1;
+ }
+ return 0;
+}
+
+
+static sector_t f2fs_bmap_compress(struct inode *inode, sector_t block)
+{
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+ struct dnode_of_data dn;
+ sector_t start_idx, blknr = 0;
+ int ret;
+
+ start_idx = round_down(block, F2FS_I(inode)->i_cluster_size);
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
+ if (ret)
+ return 0;
+
+ if (dn.data_blkaddr != COMPRESS_ADDR) {
+ dn.ofs_in_node += block - start_idx;
+ blknr = f2fs_data_blkaddr(&dn);
+ if (!__is_valid_data_blkaddr(blknr))
+ blknr = 0;
+ }
+
+ f2fs_put_dnode(&dn);
+ return blknr;
+#else
+ return 0;
+#endif
+}
+
+
+static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
+{
+ struct inode *inode = mapping->host;
+ sector_t blknr = 0;
+
+ if (f2fs_has_inline_data(inode))
+ goto out;
+
+ /* make sure allocating whole blocks */
+ if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
+ filemap_write_and_wait(mapping);
+
+ /* Block number less than F2FS MAX BLOCKS */
+ if (unlikely(block >= max_file_blocks(inode)))
+ goto out;
+
+ if (f2fs_compressed_file(inode)) {
+ blknr = f2fs_bmap_compress(inode, block);
+ } else {
+ struct f2fs_map_blocks map;
+
+ memset(&map, 0, sizeof(map));
+ map.m_lblk = block;
+ map.m_len = 1;
+ map.m_next_pgofs = NULL;
+ map.m_seg_type = NO_CHECK_TYPE;
+
+ if (!f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_BMAP))
+ blknr = map.m_pblk;
+ }
+out:
+ trace_f2fs_bmap(inode, block, blknr);
+ return blknr;
+}
+
+#ifdef CONFIG_MIGRATION
+#include <linux/migrate.h>
+
+int f2fs_migrate_page(struct address_space *mapping,
+ struct page *newpage, struct page *page, enum migrate_mode mode)
+{
+ int rc, extra_count;
+ struct f2fs_inode_info *fi = F2FS_I(mapping->host);
+ bool atomic_written = page_private_atomic(page);
+
+ BUG_ON(PageWriteback(page));
+
+ /* migrating an atomic written page is safe with the inmem_lock hold */
+ if (atomic_written) {
+ if (mode != MIGRATE_SYNC)
+ return -EBUSY;
+ if (!mutex_trylock(&fi->inmem_lock))
+ return -EAGAIN;
+ }
+
+ /* one extra reference was held for atomic_write page */
+ extra_count = atomic_written ? 1 : 0;
+ rc = migrate_page_move_mapping(mapping, newpage,
+ page, extra_count);
+ if (rc != MIGRATEPAGE_SUCCESS) {
+ if (atomic_written)
+ mutex_unlock(&fi->inmem_lock);
+ return rc;
+ }
+
+ if (atomic_written) {
+ struct inmem_pages *cur;
+
+ list_for_each_entry(cur, &fi->inmem_pages, list)
+ if (cur->page == page) {
+ cur->page = newpage;
+ break;
+ }
+ mutex_unlock(&fi->inmem_lock);
+ put_page(page);
+ get_page(newpage);
+ }
+
+ /* guarantee to start from no stale private field */
+ set_page_private(newpage, 0);
+ if (PagePrivate(page)) {
+ set_page_private(newpage, page_private(page));
+ SetPagePrivate(newpage);
+ get_page(newpage);
+
+ set_page_private(page, 0);
+ ClearPagePrivate(page);
+ put_page(page);
+ }
+
+ if (mode != MIGRATE_SYNC_NO_COPY)
+ migrate_page_copy(newpage, page);
+ else
+ migrate_page_states(newpage, page);
+
+ return MIGRATEPAGE_SUCCESS;
+}
+#endif
+
+#ifdef CONFIG_SWAP
+static int f2fs_migrate_blocks(struct inode *inode, block_t start_blk,
+ unsigned int blkcnt)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ unsigned int blkofs;
+ unsigned int blk_per_sec = BLKS_PER_SEC(sbi);
+ unsigned int secidx = start_blk / blk_per_sec;
+ unsigned int end_sec = secidx + blkcnt / blk_per_sec;
+ int ret = 0;
+
+ down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+ down_write(&F2FS_I(inode)->i_mmap_sem);
+
+ set_inode_flag(inode, FI_ALIGNED_WRITE);
+
+ for (; secidx < end_sec; secidx++) {
+ down_write(&sbi->pin_sem);
+
+ f2fs_lock_op(sbi);
+ f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED, false);
+ f2fs_unlock_op(sbi);
+
+ set_inode_flag(inode, FI_DO_DEFRAG);
+
+ for (blkofs = 0; blkofs < blk_per_sec; blkofs++) {
+ struct page *page;
+ unsigned int blkidx = secidx * blk_per_sec + blkofs;
+
+ page = f2fs_get_lock_data_page(inode, blkidx, true);
+ if (IS_ERR(page)) {
+ up_write(&sbi->pin_sem);
+ ret = PTR_ERR(page);
+ goto done;
+ }
+
+ set_page_dirty(page);
+ f2fs_put_page(page, 1);
+ }
+
+ clear_inode_flag(inode, FI_DO_DEFRAG);
+
+ ret = filemap_fdatawrite(inode->i_mapping);
+
+ up_write(&sbi->pin_sem);
+
+ if (ret)
+ break;
+ }
+
+done:
+ clear_inode_flag(inode, FI_DO_DEFRAG);
+ clear_inode_flag(inode, FI_ALIGNED_WRITE);
+
+ up_write(&F2FS_I(inode)->i_mmap_sem);
+ up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+
+ return ret;
+}
+
+static int check_swap_activate(struct swap_info_struct *sis,
+ struct file *swap_file, sector_t *span)
+{
+ struct address_space *mapping = swap_file->f_mapping;
+ struct inode *inode = mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ sector_t cur_lblock;
+ sector_t last_lblock;
+ sector_t pblock;
+ sector_t lowest_pblock = -1;
+ sector_t highest_pblock = 0;
+ int nr_extents = 0;
+ unsigned long nr_pblocks;
+ unsigned int blks_per_sec = BLKS_PER_SEC(sbi);
+ unsigned int sec_blks_mask = BLKS_PER_SEC(sbi) - 1;
+ unsigned int not_aligned = 0;
+ int ret = 0;
+
+ /*
+ * Map all the blocks into the extent list. This code doesn't try
+ * to be very smart.
+ */
+ cur_lblock = 0;
+ last_lblock = bytes_to_blks(inode, i_size_read(inode));
+
+ while (cur_lblock < last_lblock && cur_lblock < sis->max) {
+ struct f2fs_map_blocks map;
+retry:
+ cond_resched();
+
+ memset(&map, 0, sizeof(map));
+ map.m_lblk = cur_lblock;
+ map.m_len = last_lblock - cur_lblock;
+ map.m_next_pgofs = NULL;
+ map.m_next_extent = NULL;
+ map.m_seg_type = NO_CHECK_TYPE;
+ map.m_may_create = false;
+
+ ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
+ if (ret)
+ goto out;
+
+ /* hole */
+ if (!(map.m_flags & F2FS_MAP_FLAGS)) {
+ f2fs_err(sbi, "Swapfile has holes");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ pblock = map.m_pblk;
+ nr_pblocks = map.m_len;
+
+ if ((pblock - SM_I(sbi)->main_blkaddr) & sec_blks_mask ||
+ nr_pblocks & sec_blks_mask) {
+ not_aligned++;
+
+ nr_pblocks = roundup(nr_pblocks, blks_per_sec);
+ if (cur_lblock + nr_pblocks > sis->max)
+ nr_pblocks -= blks_per_sec;
+
+ if (!nr_pblocks) {
+ /* this extent is last one */
+ nr_pblocks = map.m_len;
+ f2fs_warn(sbi, "Swapfile: last extent is not aligned to section");
+ goto next;
+ }
+
+ ret = f2fs_migrate_blocks(inode, cur_lblock,
+ nr_pblocks);
+ if (ret)
+ goto out;
+ goto retry;
+ }
+next:
+ if (cur_lblock + nr_pblocks >= sis->max)
+ nr_pblocks = sis->max - cur_lblock;
+
+ if (cur_lblock) { /* exclude the header page */
+ if (pblock < lowest_pblock)
+ lowest_pblock = pblock;
+ if (pblock + nr_pblocks - 1 > highest_pblock)
+ highest_pblock = pblock + nr_pblocks - 1;
+ }
+
+ /*
+ * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks
+ */
+ ret = add_swap_extent(sis, cur_lblock, nr_pblocks, pblock);
+ if (ret < 0)
+ goto out;
+ nr_extents += ret;
+ cur_lblock += nr_pblocks;
+ }
+ ret = nr_extents;
+ *span = 1 + highest_pblock - lowest_pblock;
+ if (cur_lblock == 0)
+ cur_lblock = 1; /* force Empty message */
+ sis->max = cur_lblock;
+ sis->pages = cur_lblock - 1;
+ sis->highest_bit = cur_lblock - 1;
+out:
+ if (not_aligned)
+ f2fs_warn(sbi, "Swapfile (%u) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(%u * N)",
+ not_aligned, blks_per_sec * F2FS_BLKSIZE);
+ return ret;
+}
+
+static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
+ sector_t *span)
+{
+ struct inode *inode = file_inode(file);
+ int ret;
+
+ if (!S_ISREG(inode->i_mode))
+ return -EINVAL;
+
+ if (f2fs_readonly(F2FS_I_SB(inode)->sb))
+ return -EROFS;
+
+ if (f2fs_lfs_mode(F2FS_I_SB(inode))) {
+ f2fs_err(F2FS_I_SB(inode),
+ "Swapfile not supported in LFS mode");
+ return -EINVAL;
+ }
+
+ ret = f2fs_convert_inline_inode(inode);
+ if (ret)
+ return ret;
+
+ if (!f2fs_disable_compressed_file(inode))
+ return -EINVAL;
+
+ f2fs_precache_extents(inode);
+
+ ret = check_swap_activate(sis, file, span);
+ if (ret < 0)
+ return ret;
+
+ set_inode_flag(inode, FI_PIN_FILE);
+ f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+ return ret;
+}
+
+static void f2fs_swap_deactivate(struct file *file)
+{
+ struct inode *inode = file_inode(file);
+
+ clear_inode_flag(inode, FI_PIN_FILE);
+}
+#else
+static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
+ sector_t *span)
+{
+ return -EOPNOTSUPP;
+}
+
+static void f2fs_swap_deactivate(struct file *file)
+{
+}
+#endif
+
+const struct address_space_operations f2fs_dblock_aops = {
+ .readpage = f2fs_read_data_page,
+ .readpages = f2fs_read_data_pages,
+ .writepage = f2fs_write_data_page,
+ .writepages = f2fs_write_data_pages,
+ .write_begin = f2fs_write_begin,
+ .write_end = f2fs_write_end,
+ .set_page_dirty = f2fs_set_data_page_dirty,
+ .invalidatepage = f2fs_invalidate_page,
+ .releasepage = f2fs_release_page,
+ .direct_IO = f2fs_direct_IO,
+ .bmap = f2fs_bmap,
+ .swap_activate = f2fs_swap_activate,
+ .swap_deactivate = f2fs_swap_deactivate,
+#ifdef CONFIG_MIGRATION
+ .migratepage = f2fs_migrate_page,
+#endif
+};
+
+void f2fs_clear_page_cache_dirty_tag(struct page *page)
+{
+ struct address_space *mapping = page_mapping(page);
+ unsigned long flags;
+
+ xa_lock_irqsave(&mapping->i_pages, flags);
+ __xa_clear_mark(&mapping->i_pages, page_index(page),
+ PAGECACHE_TAG_DIRTY);
+ xa_unlock_irqrestore(&mapping->i_pages, flags);
+}
+
+int __init f2fs_init_post_read_processing(void)
+{
+ bio_post_read_ctx_cache =
+ kmem_cache_create("f2fs_bio_post_read_ctx",
+ sizeof(struct bio_post_read_ctx), 0, 0, NULL);
+ if (!bio_post_read_ctx_cache)
+ goto fail;
+ bio_post_read_ctx_pool =
+ mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
+ bio_post_read_ctx_cache);
+ if (!bio_post_read_ctx_pool)
+ goto fail_free_cache;
+ return 0;
+
+fail_free_cache:
+ kmem_cache_destroy(bio_post_read_ctx_cache);
+fail:
+ return -ENOMEM;
+}
+
+void f2fs_destroy_post_read_processing(void)
+{
+ mempool_destroy(bio_post_read_ctx_pool);
+ kmem_cache_destroy(bio_post_read_ctx_cache);
+}
+
+int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)
+{
+ if (!f2fs_sb_has_encrypt(sbi) &&
+ !f2fs_sb_has_verity(sbi) &&
+ !f2fs_sb_has_compression(sbi))
+ return 0;
+
+ sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",
+ WQ_UNBOUND | WQ_HIGHPRI,
+ num_online_cpus());
+ if (!sbi->post_read_wq)
+ return -ENOMEM;
+ return 0;
+}
+
+void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)
+{
+ if (sbi->post_read_wq)
+ destroy_workqueue(sbi->post_read_wq);
+}
+
+int __init f2fs_init_bio_entry_cache(void)
+{
+ bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",
+ sizeof(struct bio_entry));
+ if (!bio_entry_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+void f2fs_destroy_bio_entry_cache(void)
+{
+ kmem_cache_destroy(bio_entry_slab);
+}