linux-kernel - [PATCH 1/2] f2fs: don't pass a bio to f2fs_target

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Date:   Mon, 28 Feb 2022 14:41:22 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>
Cc:     Jens Axboe <axboe@...nel.dk>,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] f2fs: don't pass a bio to f2fs_target_device

Set the bdev at bio allocation time by changing the f2fs_target_device
calling conventions, so that no bio needs to be passed in.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 fs/f2fs/data.c | 25 +++++++++++++------------
 fs/f2fs/f2fs.h |  2 +-
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index e71dde8de0db0..59dd0347c4bc8 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -354,7 +354,7 @@ static void f2fs_write_end_io(struct bio *bio)
 }
 
 struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
-				block_t blk_addr, struct bio *bio)
+		block_t blk_addr, sector_t *sector)
 {
 	struct block_device *bdev = sbi->sb->s_bdev;
 	int i;
@@ -369,10 +369,9 @@ struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
 			}
 		}
 	}
-	if (bio) {
-		bio_set_dev(bio, bdev);
-		bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
-	}
+
+	if (sector)
+		*sector = SECTOR_FROM_BLOCK(blk_addr);
 	return bdev;
 }
 
@@ -392,11 +391,13 @@ int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
 static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
 {
 	struct f2fs_sb_info *sbi = fio->sbi;
+	struct block_device *bdev;
+	sector_t sector;
 	struct bio *bio;
 
-	bio = bio_alloc_bioset(NULL, npages, 0, GFP_NOIO, &f2fs_bioset);
-
-	f2fs_target_device(sbi, fio->new_blkaddr, bio);
+	bdev = f2fs_target_device(sbi, fio->new_blkaddr, &sector);
+	bio = bio_alloc_bioset(bdev, npages, 0, GFP_NOIO, &f2fs_bioset);
+	bio->bi_iter.bi_sector = sector;
 	if (is_read_io(fio->op)) {
 		bio->bi_end_io = f2fs_read_end_io;
 		bio->bi_private = NULL;
@@ -984,15 +985,15 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
 	struct bio *bio;
 	struct bio_post_read_ctx *ctx = NULL;
 	unsigned int post_read_steps = 0;
+	sector_t sector;
+	struct block_device *bdev = f2fs_target_device(sbi, blkaddr, &sector);
 
-	bio = bio_alloc_bioset(NULL, bio_max_segs(nr_pages), REQ_OP_READ,
+	bio = bio_alloc_bioset(bdev, bio_max_segs(nr_pages), REQ_OP_READ,
 			       for_write ? GFP_NOIO : GFP_KERNEL, &f2fs_bioset);
 	if (!bio)
 		return ERR_PTR(-ENOMEM);
-
+	bio->bi_iter.bi_sector = sector;
 	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;
 
 	if (fscrypt_inode_uses_fs_layer_crypto(inode))
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index eb22fa91c2b26..37faae388fe01 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3631,7 +3631,7 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio);
 int f2fs_merge_page_bio(struct f2fs_io_info *fio);
 void f2fs_submit_page_write(struct f2fs_io_info *fio);
 struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
-			block_t blk_addr, struct bio *bio);
+		block_t blk_addr, sector_t *sector);
 int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr);
 void f2fs_set_data_blkaddr(struct dnode_of_data *dn);
 void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr);
-- 
2.30.2