linux-kernel - [PATCH 03/10] f2fs: add submit

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Date:   Fri, 30 Dec 2016 10:51:10 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Cc:     Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 03/10] f2fs: add submit_bio tracepoint

This patch adds final submit_bio() tracepoint.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/data.c              |  1 +
 include/trace/events/f2fs.h | 31 +++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 2c5df1dc1479..54da4e2f1318 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -175,6 +175,7 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
 			current->plug && (type == DATA || type == NODE))
 			blk_finish_plug(current->plug);
 	}
+	trace_f2fs_submit_bio(sbi->sb, bio);
 	submit_bio(bio);
 }
 
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 4c942599581b..094d92b52450 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -55,6 +55,8 @@ TRACE_DEFINE_ENUM(CP_DISCARD);
 		{ IPU,		"IN-PLACE" },				\
 		{ OPU,		"OUT-OF-PLACE" })
 
+#define F2FS_OP	(REQ_OP_READ | REQ_OP_RAHEAD | REQ_SYNC | REQ_PREFLUSH | REQ_META |\
+			REQ_PRIO)
 #define F2FS_OP_FLAGS (REQ_RAHEAD | REQ_SYNC | REQ_PREFLUSH | REQ_META |\
 			REQ_PRIO)
 #define F2FS_BIO_FLAG_MASK(t)	(t & F2FS_OP_FLAGS)
@@ -837,6 +839,35 @@ DEFINE_EVENT_CONDITION(f2fs__submit_bio, f2fs_submit_read_bio,
 	TP_CONDITION(bio)
 );
 
+TRACE_EVENT(f2fs_submit_bio,
+
+	TP_PROTO(struct super_block *sb, struct bio *bio),
+
+	TP_ARGS(sb, bio),
+
+	TP_STRUCT__entry(
+		__field(dev_t,	dev)
+		__field(int,	op)
+		__field(int,	op_flags)
+		__field(sector_t,	sector)
+		__field(unsigned int,	size)
+	),
+
+	TP_fast_assign(
+		__entry->dev		= sb->s_dev;
+		__entry->op		= bio->bi_opf & REQ_OP_MASK;
+		__entry->op_flags	= bio->bi_opf;
+		__entry->sector		= bio->bi_iter.bi_sector;
+		__entry->size		= bio->bi_iter.bi_size;
+	),
+
+	TP_printk("dev = (%d,%d), rw = %s%s, sector = %lld, size = %u",
+		show_dev(__entry),
+		show_bio_type(__entry->op, __entry->op_flags),
+		(unsigned long long)__entry->sector,
+		__entry->size)
+);
+
 TRACE_EVENT(f2fs_write_begin,
 
 	TP_PROTO(struct inode *inode, loff_t pos, unsigned int len,
-- 
2.11.0