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Message-ID: <52B4106F.2050709@cn.fujitsu.com>
Date: Fri, 20 Dec 2013 17:39:59 +0800
From: Gu Zheng <guz.fnst@...fujitsu.com>
To: Kim <jaegeuk.kim@...sung.com>
CC: f2fs <linux-f2fs-devel@...ts.sourceforge.net>,
linux-kernel <linux-kernel@...r.kernel.org>,
fsdevel <linux-fsdevel@...r.kernel.org>,
俞超 <chao2.yu@...sung.com>
Subject: [f2fs-dev][PATCH v3] f2fs: move all the bio initialization into __bio_alloc
Move all the bio initialization into __bio_alloc, and some minor cleanups are
also added.
v3:
Use 'bool' rather than 'int' as Kim suggested.
v2:
Use 'is_read' rather than 'rw' as Yu Chao suggested.
Remove the needless initialization of bio->bi_private.
Signed-off-by: Gu Zheng <guz.fnst@...fujitsu.com>
---
fs/f2fs/data.c | 92 +++++++++++++++++++++++++------------------------------
1 files changed, 42 insertions(+), 50 deletions(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 9bdacc6..94fa651 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -24,20 +24,6 @@
#include "segment.h"
#include <trace/events/f2fs.h>
-/*
- * Low-level block read/write IO operations.
- */
-static struct bio *__bio_alloc(struct block_device *bdev, int npages)
-{
- struct bio *bio;
-
- /* No failure on bio allocation */
- bio = bio_alloc(GFP_NOIO, npages);
- bio->bi_bdev = bdev;
- bio->bi_private = NULL;
- return bio;
-}
-
static void f2fs_read_end_io(struct bio *bio, int err)
{
const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
@@ -93,6 +79,24 @@ static void f2fs_write_end_io(struct bio *bio, int err)
bio_put(bio);
}
+/*
+ * Low-level block read/write IO operations.
+ */
+static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr,
+ int npages, bool is_read)
+{
+ struct bio *bio;
+
+ /* No failure on bio allocation */
+ bio = bio_alloc(GFP_NOIO, npages);
+
+ bio->bi_bdev = sbi->sb->s_bdev;
+ bio->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr);
+ bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io;
+
+ return bio;
+}
+
static void __submit_merged_bio(struct f2fs_bio_info *io)
{
struct f2fs_io_info *fio = &io->fio;
@@ -104,25 +108,26 @@ static void __submit_merged_bio(struct f2fs_bio_info *io)
rw = fio->rw | fio->rw_flag;
if (is_read_io(rw)) {
- trace_f2fs_submit_read_bio(io->sbi->sb, rw, fio->type, io->bio);
+ trace_f2fs_submit_read_bio(io->sbi->sb, rw,
+ fio->type, io->bio);
submit_bio(rw, io->bio);
- io->bio = NULL;
- return;
- }
- trace_f2fs_submit_write_bio(io->sbi->sb, rw, fio->type, io->bio);
-
- /*
- * META_FLUSH is only from the checkpoint procedure, and we should wait
- * this metadata bio for FS consistency.
- */
- if (fio->type == META_FLUSH) {
- DECLARE_COMPLETION_ONSTACK(wait);
- io->bio->bi_private = &wait;
- submit_bio(rw, io->bio);
- wait_for_completion(&wait);
} else {
- submit_bio(rw, io->bio);
+ trace_f2fs_submit_write_bio(io->sbi->sb, rw,
+ fio->type, io->bio);
+ /*
+ * META_FLUSH is only from the checkpoint procedure, and we
+ * should wait this metadata bio for FS consistency.
+ */
+ if (fio->type == META_FLUSH) {
+ DECLARE_COMPLETION_ONSTACK(wait);
+ io->bio->bi_private = &wait;
+ submit_bio(rw, io->bio);
+ wait_for_completion(&wait);
+ } else {
+ submit_bio(rw, io->bio);
+ }
}
+
io->bio = NULL;
}
@@ -152,17 +157,12 @@ void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi,
int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page,
block_t blk_addr, int rw)
{
- struct block_device *bdev = sbi->sb->s_bdev;
struct bio *bio;
trace_f2fs_submit_page_bio(page, blk_addr, rw);
/* Allocate a new bio */
- bio = __bio_alloc(bdev, 1);
-
- /* Initialize the bio */
- bio->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr);
- bio->bi_end_io = is_read_io(rw) ? f2fs_read_end_io : f2fs_write_end_io;
+ bio = __bio_alloc(sbi, blk_addr, 1, is_read_io(rw));
if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) {
bio_put(bio);
@@ -178,17 +178,16 @@ void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page,
block_t blk_addr, struct f2fs_io_info *fio)
{
enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
- struct block_device *bdev = sbi->sb->s_bdev;
struct f2fs_bio_info *io;
- int bio_blocks;
+ bool is_read = is_read_io(fio->rw);
- io = is_read_io(fio->rw) ? &sbi->read_io : &sbi->write_io[btype];
+ io = is_read ? &sbi->read_io : &sbi->write_io[btype];
verify_block_addr(sbi, blk_addr);
mutex_lock(&io->io_mutex);
- if (!is_read_io(fio->rw))
+ if (!is_read)
inc_page_count(sbi, F2FS_WRITEBACK);
if (io->bio && (io->last_block_in_bio != blk_addr - 1 ||
@@ -196,17 +195,10 @@ void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page,
__submit_merged_bio(io);
alloc_new:
if (io->bio == NULL) {
- bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
- io->bio = __bio_alloc(bdev, bio_blocks);
- io->bio->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr);
- io->bio->bi_end_io = is_read_io(fio->rw) ? f2fs_read_end_io :
- f2fs_write_end_io;
+ int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
+
+ io->bio = __bio_alloc(sbi, blk_addr, bio_blocks, is_read);
io->fio = *fio;
- /*
- * The end_io will be assigned at the sumbission phase.
- * Until then, let bio_add_page() merge consecutive IOs as much
- * as possible.
- */
}
if (bio_add_page(io->bio, page, PAGE_CACHE_SIZE, 0) <
--
1.7.7
--
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