linux-kernel - [PATCH v4 2/2] f2fs: clean up parameters of iostat_update_and_unbind

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Date:   Wed,  1 Feb 2023 18:47:03 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     jaegeuk@...nel.org, chao@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Yangtao Li <frank.li@...o.com>
Subject: [PATCH v4 2/2] f2fs: clean up parameters of iostat_update_and_unbind_ctx()

From: Chao Yu <chao@...nel.org>

Parsing sync/rw type from bio inside iostat_update_and_unbind_ctx()
to avoid unnecessary parameters.

Signed-off-by: Chao Yu <chao@...nel.org>
[Yangtao: remove lat_type check]
Signed-off-by: Yangtao Li <frank.li@...o.com>
---
change:
-remove lat_type check
 fs/f2fs/data.c   |  4 ++--
 fs/f2fs/iostat.c | 19 ++++++++++---------
 fs/f2fs/iostat.h |  4 ++--
 3 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 86fc28adc970..82e326c0e11d 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -292,7 +292,7 @@ static void f2fs_read_end_io(struct bio *bio)
 	struct bio_post_read_ctx *ctx;
 	bool intask = in_task();
 
-	iostat_update_and_unbind_ctx(bio, READ_IO);
+	iostat_update_and_unbind_ctx(bio);
 	ctx = bio->bi_private;
 
 	if (time_to_inject(sbi, FAULT_READ_IO))
@@ -330,7 +330,7 @@ static void f2fs_write_end_io(struct bio *bio)
 	struct bio_vec *bvec;
 	struct bvec_iter_all iter_all;
 
-	iostat_update_and_unbind_ctx(bio, bio->bi_opf & REQ_SYNC ? WRITE_SYNC_IO : WRITE_ASYNC_IO);
+	iostat_update_and_unbind_ctx(bio);
 	sbi = bio->bi_private;
 
 	if (time_to_inject(sbi, FAULT_WRITE_IO))
diff --git a/fs/f2fs/iostat.c b/fs/f2fs/iostat.c
index c767a2e7d5a9..3d5bfb1ad585 100644
--- a/fs/f2fs/iostat.c
+++ b/fs/f2fs/iostat.c
@@ -228,11 +228,6 @@ static inline void __update_iostat_latency(struct bio_iostat_ctx *iostat_ctx,
 		return;
 	}
 
-	if (lat_type >= MAX_IO_TYPE) {
-		f2fs_warn(sbi, "%s: %d over MAX_IO_TYPE", __func__, lat_type);
-		return;
-	}
-
 	spin_lock_irqsave(&sbi->iostat_lat_lock, flags);
 	io_lat->sum_lat[lat_type][page_type] += ts_diff;
 	io_lat->bio_cnt[lat_type][page_type]++;
@@ -241,14 +236,20 @@ static inline void __update_iostat_latency(struct bio_iostat_ctx *iostat_ctx,
 	spin_unlock_irqrestore(&sbi->iostat_lat_lock, flags);
 }
 
-void iostat_update_and_unbind_ctx(struct bio *bio, enum iostat_lat_type lat_type)
+void iostat_update_and_unbind_ctx(struct bio *bio)
 {
 	struct bio_iostat_ctx *iostat_ctx = bio->bi_private;
+	enum iostat_lat_type lat_type;
 
-	if (lat_type == READ_IO)
-		bio->bi_private = iostat_ctx->post_read_ctx;
-	else
+	if (op_is_write(bio_op(bio))) {
+		lat_type = bio->bi_opf & REQ_SYNC ?
+				WRITE_SYNC_IO : WRITE_ASYNC_IO;
 		bio->bi_private = iostat_ctx->sbi;
+	} else {
+		lat_type = READ_IO;
+		bio->bi_private = iostat_ctx->post_read_ctx;
+	}
+
 	__update_iostat_latency(iostat_ctx, lat_type);
 	mempool_free(iostat_ctx, bio_iostat_ctx_pool);
 }
diff --git a/fs/f2fs/iostat.h b/fs/f2fs/iostat.h
index 1f827a2fe6b2..eb99d05cf272 100644
--- a/fs/f2fs/iostat.h
+++ b/fs/f2fs/iostat.h
@@ -58,7 +58,7 @@ static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)
 	return iostat_ctx->post_read_ctx;
 }
 
-extern void iostat_update_and_unbind_ctx(struct bio *bio, enum iostat_lat_type type);
+extern void iostat_update_and_unbind_ctx(struct bio *bio);
 extern void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
 		struct bio *bio, struct bio_post_read_ctx *ctx);
 extern int f2fs_init_iostat_processing(void);
@@ -68,7 +68,7 @@ extern void f2fs_destroy_iostat(struct f2fs_sb_info *sbi);
 #else
 static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,
 		enum iostat_type type, unsigned long long io_bytes) {}
-static inline void iostat_update_and_unbind_ctx(struct bio *bio, enum iostat_lat_type type) {}
+static inline void iostat_update_and_unbind_ctx(struct bio *bio) {}
 static inline void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
 		struct bio *bio, struct bio_post_read_ctx *ctx) {}
 static inline void iostat_update_submit_ctx(struct bio *bio,
-- 
2.25.1