f2fs: add a tracepoint for f2fs_write_end

This patch adds a tracepoint for f2fs_write_end to trace write op of user.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

2 files changed, 32 insertions, 0 deletions

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index cde0d69969b9..ea58fb698ac6 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -989,6 +989,8 @@ static int f2fs_write_end(struct file *file,
 {
         struct inode *inode = page->mapping->host;
 
+        trace_f2fs_write_end(inode, pos, len, copied);
+
         SetPageUptodate(page);
         set_page_dirty(page);
 
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 1e9375aa9340..483804b55742 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -689,6 +689,36 @@ TRACE_EVENT(f2fs_write_begin,
                 __entry->flags)
 );
 
+TRACE_EVENT(f2fs_write_end,
+
+        TP_PROTO(struct inode *inode, loff_t pos, unsigned int len,
+                                unsigned int copied),
+
+        TP_ARGS(inode, pos, len, copied),
+
+        TP_STRUCT__entry(
+                __field(dev_t,  dev)
+                __field(ino_t,  ino)
+                __field(loff_t, pos)
+                __field(unsigned int, len)
+                __field(unsigned int, copied)
+        ),
+
+        TP_fast_assign(
+                __entry->dev    = inode->i_sb->s_dev;
+                __entry->ino    = inode->i_ino;
+                __entry->pos    = pos;
+                __entry->len    = len;
+                __entry->copied = copied;
+        ),
+
+        TP_printk("dev = (%d,%d), ino = %lu, pos = %llu, len = %u, copied = %u",
+                show_dev_ino(__entry),
+                (unsigned long long)__entry->pos,
+                __entry->len,
+                __entry->copied)
+);
+
 DECLARE_EVENT_CLASS(f2fs__page,
 
         TP_PROTO(struct page *page, int type),