linux-kernel - [PATCH 1/2] f2fs: trace f2fs_ioc

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Date:   Tue, 26 Feb 2019 19:01:15 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     <jaegeuk@...nel.org>
CC:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <chao@...nel.org>,
        Chao Yu <yuchao0@...wei.com>
Subject: [PATCH 1/2] f2fs: trace f2fs_ioc_shutdown

This patch supports to trace f2fs_ioc_shutdown.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/file.c              |  3 +++
 include/trace/events/f2fs.h | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 2e7ae5974633..4b852cab21f8 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1993,6 +1993,9 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
 out:
 	if (in != F2FS_GOING_DOWN_FULLSYNC)
 		mnt_drop_write_file(filp);
+
+	trace_f2fs_shutdown(sbi, in, ret);
+
 	return ret;
 }
 
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index bbbfc9bc0686..4683ee10fe61 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -149,6 +149,14 @@ TRACE_DEFINE_ENUM(CP_TRIMMED);
 		{ CP_SPEC_LOG_NUM,	"log type is 2" },		\
 		{ CP_RECOVER_DIR,	"dir needs recovery" })
 
+#define show_shutdown_mode(type)					\
+	__print_symbolic(type,						\
+		{ F2FS_GOING_DOWN_FULLSYNC,	"full sync" },		\
+		{ F2FS_GOING_DOWN_METASYNC,	"meta sync" },		\
+		{ F2FS_GOING_DOWN_NOSYNC,	"no sync" },		\
+		{ F2FS_GOING_DOWN_METAFLUSH,	"meta flush" },		\
+		{ F2FS_GOING_DOWN_NEED_FSCK,	"need fsck" })
+
 struct f2fs_sb_info;
 struct f2fs_io_info;
 struct extent_info;
@@ -1619,6 +1627,30 @@ DEFINE_EVENT(f2fs_sync_dirty_inodes, f2fs_sync_dirty_inodes_exit,
 	TP_ARGS(sb, type, count)
 );
 
+TRACE_EVENT(f2fs_shutdown,
+
+	TP_PROTO(struct f2fs_sb_info *sbi, unsigned int mode, int ret),
+
+	TP_ARGS(sbi, mode, ret),
+
+	TP_STRUCT__entry(
+		__field(dev_t,	dev)
+		__field(unsigned int, mode)
+		__field(int, ret)
+	),
+
+	TP_fast_assign(
+		__entry->dev = sbi->sb->s_dev;
+		__entry->mode = mode;
+		__entry->ret = ret;
+	),
+
+	TP_printk("dev = (%d,%d), mode: %s, ret:%d",
+		show_dev(__entry->dev),
+		show_shutdown_mode(__entry->mode),
+		__entry->ret)
+);
+
 #endif /* _TRACE_F2FS_H */
 
  /* This part must be outside protection */
-- 
2.18.0.rc1