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4231 lines
101 KiB
4231 lines
101 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
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* fs/f2fs/data.c |
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* |
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* Copyright (c) 2012 Samsung Electronics Co., Ltd. |
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* http://www.samsung.com/ |
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*/ |
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#include <linux/fs.h> |
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#include <linux/f2fs_fs.h> |
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#include <linux/buffer_head.h> |
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#include <linux/mpage.h> |
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#include <linux/writeback.h> |
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#include <linux/backing-dev.h> |
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#include <linux/pagevec.h> |
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#include <linux/blkdev.h> |
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#include <linux/bio.h> |
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#include <linux/blk-crypto.h> |
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#include <linux/swap.h> |
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#include <linux/prefetch.h> |
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#include <linux/uio.h> |
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#include <linux/cleancache.h> |
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#include <linux/sched/signal.h> |
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#include <linux/fiemap.h> |
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|
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#include "f2fs.h" |
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#include "node.h" |
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#include "segment.h" |
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#include "iostat.h" |
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#include <trace/events/f2fs.h> |
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|
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#define NUM_PREALLOC_POST_READ_CTXS 128 |
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|
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static struct kmem_cache *bio_post_read_ctx_cache; |
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static struct kmem_cache *bio_entry_slab; |
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static mempool_t *bio_post_read_ctx_pool; |
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static struct bio_set f2fs_bioset; |
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|
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#define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE |
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|
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int __init f2fs_init_bioset(void) |
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{ |
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if (bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE, |
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0, BIOSET_NEED_BVECS)) |
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return -ENOMEM; |
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return 0; |
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} |
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|
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void f2fs_destroy_bioset(void) |
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{ |
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bioset_exit(&f2fs_bioset); |
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} |
|
|
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static bool __is_cp_guaranteed(struct page *page) |
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{ |
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struct address_space *mapping = page->mapping; |
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struct inode *inode; |
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struct f2fs_sb_info *sbi; |
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|
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if (!mapping) |
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return false; |
|
|
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inode = mapping->host; |
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sbi = F2FS_I_SB(inode); |
|
|
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if (inode->i_ino == F2FS_META_INO(sbi) || |
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inode->i_ino == F2FS_NODE_INO(sbi) || |
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S_ISDIR(inode->i_mode)) |
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return true; |
|
|
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if (f2fs_is_compressed_page(page)) |
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return false; |
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if ((S_ISREG(inode->i_mode) && |
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(f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) || |
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page_private_gcing(page)) |
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return true; |
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return false; |
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} |
|
|
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static enum count_type __read_io_type(struct page *page) |
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{ |
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struct address_space *mapping = page_file_mapping(page); |
|
|
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if (mapping) { |
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struct inode *inode = mapping->host; |
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
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|
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if (inode->i_ino == F2FS_META_INO(sbi)) |
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return F2FS_RD_META; |
|
|
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if (inode->i_ino == F2FS_NODE_INO(sbi)) |
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return F2FS_RD_NODE; |
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} |
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return F2FS_RD_DATA; |
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} |
|
|
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/* postprocessing steps for read bios */ |
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enum bio_post_read_step { |
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#ifdef CONFIG_FS_ENCRYPTION |
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STEP_DECRYPT = 1 << 0, |
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#else |
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STEP_DECRYPT = 0, /* compile out the decryption-related code */ |
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#endif |
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#ifdef CONFIG_F2FS_FS_COMPRESSION |
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STEP_DECOMPRESS = 1 << 1, |
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#else |
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STEP_DECOMPRESS = 0, /* compile out the decompression-related code */ |
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#endif |
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#ifdef CONFIG_FS_VERITY |
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STEP_VERITY = 1 << 2, |
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#else |
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STEP_VERITY = 0, /* compile out the verity-related code */ |
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#endif |
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}; |
|
|
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struct bio_post_read_ctx { |
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struct bio *bio; |
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struct f2fs_sb_info *sbi; |
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struct work_struct work; |
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unsigned int enabled_steps; |
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block_t fs_blkaddr; |
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}; |
|
|
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static void f2fs_finish_read_bio(struct bio *bio) |
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{ |
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struct bio_vec *bv; |
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struct bvec_iter_all iter_all; |
|
|
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/* |
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* Update and unlock the bio's pagecache pages, and put the |
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* decompression context for any compressed pages. |
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*/ |
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bio_for_each_segment_all(bv, bio, iter_all) { |
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struct page *page = bv->bv_page; |
|
|
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if (f2fs_is_compressed_page(page)) { |
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if (bio->bi_status) |
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f2fs_end_read_compressed_page(page, true, 0); |
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f2fs_put_page_dic(page); |
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continue; |
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} |
|
|
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/* PG_error was set if decryption or verity failed. */ |
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if (bio->bi_status || PageError(page)) { |
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ClearPageUptodate(page); |
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/* will re-read again later */ |
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ClearPageError(page); |
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} else { |
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SetPageUptodate(page); |
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} |
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dec_page_count(F2FS_P_SB(page), __read_io_type(page)); |
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unlock_page(page); |
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} |
|
|
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if (bio->bi_private) |
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mempool_free(bio->bi_private, bio_post_read_ctx_pool); |
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bio_put(bio); |
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} |
|
|
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static void f2fs_verify_bio(struct work_struct *work) |
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{ |
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struct bio_post_read_ctx *ctx = |
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container_of(work, struct bio_post_read_ctx, work); |
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struct bio *bio = ctx->bio; |
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bool may_have_compressed_pages = (ctx->enabled_steps & STEP_DECOMPRESS); |
|
|
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/* |
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* fsverity_verify_bio() may call readpages() again, and while verity |
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* will be disabled for this, decryption and/or decompression may still |
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* be needed, resulting in another bio_post_read_ctx being allocated. |
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* So to prevent deadlocks we need to release the current ctx to the |
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* mempool first. This assumes that verity is the last post-read step. |
|
*/ |
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mempool_free(ctx, bio_post_read_ctx_pool); |
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bio->bi_private = NULL; |
|
|
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/* |
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* Verify the bio's pages with fs-verity. Exclude compressed pages, |
|
* as those were handled separately by f2fs_end_read_compressed_page(). |
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*/ |
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if (may_have_compressed_pages) { |
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struct bio_vec *bv; |
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struct bvec_iter_all iter_all; |
|
|
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bio_for_each_segment_all(bv, bio, iter_all) { |
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struct page *page = bv->bv_page; |
|
|
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if (!f2fs_is_compressed_page(page) && |
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!PageError(page) && !fsverity_verify_page(page)) |
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SetPageError(page); |
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} |
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} else { |
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fsverity_verify_bio(bio); |
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} |
|
|
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f2fs_finish_read_bio(bio); |
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} |
|
|
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/* |
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* If the bio's data needs to be verified with fs-verity, then enqueue the |
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* verity work for the bio. Otherwise finish the bio now. |
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* |
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* Note that to avoid deadlocks, the verity work can't be done on the |
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* decryption/decompression workqueue. This is because verifying the data pages |
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* can involve reading verity metadata pages from the file, and these verity |
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* metadata pages may be encrypted and/or compressed. |
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*/ |
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static void f2fs_verify_and_finish_bio(struct bio *bio) |
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{ |
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struct bio_post_read_ctx *ctx = bio->bi_private; |
|
|
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if (ctx && (ctx->enabled_steps & STEP_VERITY)) { |
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INIT_WORK(&ctx->work, f2fs_verify_bio); |
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fsverity_enqueue_verify_work(&ctx->work); |
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} else { |
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f2fs_finish_read_bio(bio); |
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} |
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} |
|
|
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/* |
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* Handle STEP_DECOMPRESS by decompressing any compressed clusters whose last |
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* remaining page was read by @ctx->bio. |
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* |
|
* 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. |
|
*/ |
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static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx) |
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{ |
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struct bio_vec *bv; |
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struct bvec_iter_all iter_all; |
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bool all_compressed = true; |
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block_t blkaddr = ctx->fs_blkaddr; |
|
|
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bio_for_each_segment_all(bv, ctx->bio, iter_all) { |
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struct page *page = bv->bv_page; |
|
|
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/* PG_error was set if decryption failed. */ |
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if (f2fs_is_compressed_page(page)) |
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f2fs_end_read_compressed_page(page, PageError(page), |
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blkaddr); |
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else |
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all_compressed = false; |
|
|
|
blkaddr++; |
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} |
|
|
|
/* |
|
* 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) |
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ctx->enabled_steps &= ~STEP_VERITY; |
|
} |
|
|
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static void f2fs_post_read_work(struct work_struct *work) |
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{ |
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struct bio_post_read_ctx *ctx = |
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container_of(work, struct bio_post_read_ctx, work); |
|
|
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if (ctx->enabled_steps & STEP_DECRYPT) |
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fscrypt_decrypt_bio(ctx->bio); |
|
|
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if (ctx->enabled_steps & STEP_DECOMPRESS) |
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f2fs_handle_step_decompress(ctx); |
|
|
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f2fs_verify_and_finish_bio(ctx->bio); |
|
} |
|
|
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static void f2fs_read_end_io(struct bio *bio) |
|
{ |
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struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio)); |
|
struct bio_post_read_ctx *ctx; |
|
|
|
iostat_update_and_unbind_ctx(bio, 0); |
|
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))) { |
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INIT_WORK(&ctx->work, f2fs_post_read_work); |
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queue_work(ctx->sbi->post_read_wq, &ctx->work); |
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} else { |
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f2fs_verify_and_finish_bio(bio); |
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} |
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} |
|
|
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static void f2fs_write_end_io(struct bio *bio) |
|
{ |
|
struct f2fs_sb_info *sbi; |
|
struct bio_vec *bvec; |
|
struct bvec_iter_all iter_all; |
|
|
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iostat_update_and_unbind_ctx(bio, 1); |
|
sbi = bio->bi_private; |
|
|
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if (time_to_inject(sbi, FAULT_WRITE_IO)) { |
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f2fs_show_injection_info(sbi, FAULT_WRITE_IO); |
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bio->bi_status = BLK_STS_IOERR; |
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} |
|
|
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bio_for_each_segment_all(bvec, bio, iter_all) { |
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struct page *page = bvec->bv_page; |
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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)) |
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f2fs_stop_checkpoint(sbi, true); |
|
continue; |
|
} |
|
|
|
fscrypt_finalize_bounce_page(&page); |
|
|
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#ifdef CONFIG_F2FS_FS_COMPRESSION |
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if (f2fs_is_compressed_page(page)) { |
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f2fs_compress_write_end_io(bio, page); |
|
continue; |
|
} |
|
#endif |
|
|
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if (unlikely(bio->bi_status)) { |
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mapping_set_error(page->mapping, -EIO); |
|
if (type == F2FS_WB_CP_DATA) |
|
f2fs_stop_checkpoint(sbi, true); |
|
} |
|
|
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f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) && |
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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; |
|
} |
|
|
|
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); |
|
} |
|
iostat_alloc_and_bind_ctx(sbi, bio, NULL); |
|
|
|
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); |
|
} |
|
|
|
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); |
|
|
|
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); |
|
|
|
iostat_update_submit_ctx(bio, type); |
|
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, 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 bio->bi_bdev == f2fs_target_device(sbi, cur_blkaddr, NULL); |
|
} |
|
|
|
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, true, NULL); |
|
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_VECS); |
|
__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, 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_VECS); |
|
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, bio_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 = NULL; |
|
unsigned int post_read_steps = 0; |
|
|
|
bio = bio_alloc_bioset(for_write ? GFP_NOIO : GFP_KERNEL, |
|
bio_max_segs(nr_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; |
|
ctx->fs_blkaddr = blkaddr; |
|
bio->bi_private = ctx; |
|
} |
|
iostat_alloc_and_bind_ctx(sbi, bio, 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, }; |
|
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, }; |
|
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, }; |
|
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 (f2fs_compressed_file(inode) && |
|
f2fs_sanity_check_cluster(&dn) && |
|
(flag != F2FS_GET_BLOCK_FIEMAP || |
|
IS_ENABLED(CONFIG_F2FS_CHECK_FS))) { |
|
err = -EFSCORRUPTED; |
|
goto sync_out; |
|
} |
|
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, compr_appended; |
|
unsigned int cluster_size = F2FS_I(inode)->i_cluster_size; |
|
unsigned int count_in_cluster = 0; |
|
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_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_lblk += 1; |
|
map.m_len = cluster_size - count_in_cluster; |
|
} |
|
|
|
ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP); |
|
if (ret) |
|
goto out; |
|
|
|
/* HOLE */ |
|
if (!compr_cluster && !(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; |
|
} |
|
|
|
compr_appended = false; |
|
/* In a case of compressed cluster, append this to the last extent */ |
|
if (compr_cluster && ((map.m_flags & F2FS_MAP_UNWRITTEN) || |
|
!(map.m_flags & F2FS_MAP_FLAGS))) { |
|
compr_appended = true; |
|
goto skip_fill; |
|
} |
|
|
|
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; |
|
|
|
skip_fill: |
|
if (map.m_pblk == COMPRESS_ADDR) { |
|
compr_cluster = true; |
|
count_in_cluster = 1; |
|
} else if (compr_appended) { |
|
unsigned int appended_blks = cluster_size - |
|
count_in_cluster + 1; |
|
size += blks_to_bytes(inode, appended_blks); |
|
start_blk += appended_blks; |
|
compr_cluster = false; |
|
} else { |
|
logical = blks_to_bytes(inode, start_blk); |
|
phys = __is_valid_data_blkaddr(map.m_pblk) ? |
|
blks_to_bytes(inode, map.m_pblk) : 0; |
|
size = blks_to_bytes(inode, map.m_len); |
|
flags = 0; |
|
|
|
if (compr_cluster) { |
|
flags = FIEMAP_EXTENT_ENCODED; |
|
count_in_cluster += map.m_len; |
|
if (count_in_cluster == cluster_size) { |
|
compr_cluster = false; |
|
size += blks_to_bytes(inode, 1); |
|
} |
|
} else 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; |
|
struct extent_info ei = {0, }; |
|
bool from_dnode = true; |
|
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); |
|
if (for_write) |
|
put_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; |
|
|
|
if (f2fs_lookup_extent_cache(inode, start_idx, &ei)) |
|
from_dnode = false; |
|
|
|
if (!from_dnode) |
|
goto skip_reading_dnode; |
|
|
|
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); |
|
|
|
skip_reading_dnode: |
|
for (i = 1; i < cc->cluster_size; i++) { |
|
block_t blkaddr; |
|
|
|
blkaddr = from_dnode ? data_blkaddr(dn.inode, dn.node_page, |
|
dn.ofs_in_node + i) : |
|
ei.blk + i - 1; |
|
|
|
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++; |
|
|
|
if (!from_dnode && i >= ei.c_len) |
|
break; |
|
} |
|
|
|
/* 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 = from_dnode ? data_blkaddr(dn.inode, dn.node_page, |
|
dn.ofs_in_node + i + 1) : |
|
ei.blk + i; |
|
|
|
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 = get_post_read_ctx(bio); |
|
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; |
|
} |
|
|
|
if (from_dnode) |
|
f2fs_put_dnode(&dn); |
|
|
|
*bio_ret = bio; |
|
return 0; |
|
|
|
out_put_dnode: |
|
if (from_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. |
|
*/ |
|
static int f2fs_mpage_readpages(struct inode *inode, |
|
struct readahead_control *rac, struct page *page) |
|
{ |
|
struct bio *bio = NULL; |
|
sector_t last_block_in_bio = 0; |
|
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, |
|
}; |
|
pgoff_t nc_cluster_idx = NULL_CLUSTER; |
|
#endif |
|
unsigned nr_pages = rac ? readahead_count(rac) : 1; |
|
unsigned max_nr_pages = nr_pages; |
|
int ret = 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; |
|
|
|
for (; nr_pages; nr_pages--) { |
|
if (rac) { |
|
page = readahead_page(rac); |
|
prefetchw(&page->flags); |
|
} |
|
|
|
#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, |
|
rac != NULL, false); |
|
f2fs_destroy_compress_ctx(&cc, false); |
|
if (ret) |
|
goto set_error_page; |
|
} |
|
if (cc.cluster_idx == NULL_CLUSTER) { |
|
if (nc_cluster_idx == |
|
page->index >> cc.log_cluster_size) { |
|
goto read_single_page; |
|
} |
|
|
|
ret = f2fs_is_compressed_cluster(inode, page->index); |
|
if (ret < 0) |
|
goto set_error_page; |
|
else if (!ret) { |
|
nc_cluster_idx = |
|
page->index >> cc.log_cluster_size; |
|
goto read_single_page; |
|
} |
|
|
|
nc_cluster_idx = NULL_CLUSTER; |
|
} |
|
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, rac); |
|
if (ret) { |
|
#ifdef CONFIG_F2FS_FS_COMPRESSION |
|
set_error_page: |
|
#endif |
|
SetPageError(page); |
|
zero_user_segment(page, 0, PAGE_SIZE); |
|
unlock_page(page); |
|
} |
|
#ifdef CONFIG_F2FS_FS_COMPRESSION |
|
next_page: |
|
#endif |
|
if (rac) |
|
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, |
|
rac != NULL, false); |
|
f2fs_destroy_compress_ctx(&cc, false); |
|
} |
|
} |
|
#endif |
|
} |
|
if (bio) |
|
__submit_bio(F2FS_I_SB(inode), bio, DATA); |
|
return 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(inode, NULL, page); |
|
return ret; |
|
} |
|
|
|
static void f2fs_readahead(struct readahead_control *rac) |
|
{ |
|
struct inode *inode = rac->mapping->host; |
|
|
|
trace_f2fs_readpages(inode, readahead_index(rac), readahead_count(rac)); |
|
|
|
if (!f2fs_is_compress_backend_ready(inode)) |
|
return; |
|
|
|
/* If the file has inline data, skip readpages */ |
|
if (f2fs_has_inline_data(inode)) |
|
return; |
|
|
|
f2fs_mpage_readpages(inode, rac, NULL); |
|
} |
|
|
|
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, }; |
|
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)) |
|
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 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) { |
|
index = mapping->writeback_index; /* prev offset */ |
|
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])) |
|
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 inode *inode, loff_t to) |
|
{ |
|
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]); |
|
filemap_invalidate_lock(inode->i_mapping); |
|
|
|
truncate_pagecache(inode, i_size); |
|
f2fs_truncate_blocks(inode, i_size, true); |
|
|
|
filemap_invalidate_unlock(inode->i_mapping); |
|
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, }; |
|
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; |
|
|
|
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; |
|
|
|
if (len == PAGE_SIZE) |
|
goto repeat; |
|
|
|
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(inode, 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_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 = rw == WRITE && f2fs_lfs_mode(sbi); |
|
|
|
trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
|
|
|
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(inode, 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: |
|
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]); |
|
filemap_invalidate_lock(inode->i_mapping); |
|
|
|
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); |
|
|
|
filemap_invalidate_unlock(inode->i_mapping); |
|
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, |
|
.readahead = f2fs_readahead, |
|
.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); |
|
}
|
|
|