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Subject[PATCH 1/2] f2fs: introduce {page,io}_is_mergeable() for readability
Date
Wrap merge condition into function for readability, no logic change.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/data.c | 42 +++++++++++++++++++++++++++++++++++-------
1 file changed, 35 insertions(+), 7 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 6a8db4a..bdfd8fb 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -482,6 +482,35 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
return 0;
}

+static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
+ block_t last_blkaddr, block_t cur_blkaddr)
+{
+ if (!bio)
+ return true;
+ if (last_blkaddr != cur_blkaddr)
+ return false;
+ return __same_bdev(sbi, cur_blkaddr, bio);
+}
+
+static bool io_type_is_mergeable(struct f2fs_bio_info *io,
+ struct f2fs_io_info *fio)
+{
+ if (io->fio.op != fio->op)
+ return false;
+ return io->fio.op_flags == fio->op_flags;
+}
+
+static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
+ struct f2fs_bio_info *io,
+ struct f2fs_io_info *fio,
+ block_t last_blkaddr,
+ block_t cur_blkaddr)
+{
+ if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
+ return false;
+ return io_type_is_mergeable(io, fio);
+}
+
int f2fs_merge_page_bio(struct f2fs_io_info *fio)
{
struct bio *bio = *fio->bio;
@@ -495,8 +524,8 @@ int f2fs_merge_page_bio(struct f2fs_io_info *fio)
trace_f2fs_submit_page_bio(page, fio);
f2fs_trace_ios(fio, 0);

- if (bio && (*fio->last_block + 1 != fio->new_blkaddr ||
- !__same_bdev(fio->sbi, fio->new_blkaddr, bio))) {
+ if (!page_is_mergeable(fio->sbi, bio, *fio->last_block,
+ fio->new_blkaddr)) {
__submit_bio(fio->sbi, bio, fio->type);
bio = NULL;
}
@@ -569,9 +598,8 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio)

inc_page_count(sbi, WB_DATA_TYPE(bio_page));

- if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 ||
- (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) ||
- !__same_bdev(sbi, fio->new_blkaddr, io->bio)))
+ if (!io_is_mergeable(sbi, io->bio, io, fio,
+ io->last_block_in_bio, fio->new_blkaddr))
__submit_merged_bio(io);
alloc_new:
if (io->bio == NULL) {
@@ -1643,8 +1671,8 @@ static int f2fs_read_single_page(struct inode *inode, struct page *page,
* This page will go to BIO. Do we need to send this
* BIO off first?
*/
- if (bio && (*last_block_in_bio != block_nr - 1 ||
- !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) {
+ if (!page_is_mergeable(F2FS_I_SB(inode), bio,
+ *last_block_in_bio, block_nr - 1)) {
submit_and_realloc:
__submit_bio(F2FS_I_SB(inode), bio, DATA);
bio = NULL;
--
2.7.4
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