[PATCH v3 v3 6/7] ntfs3: add iomap tracepoints

From: Baolin Liu <[email protected]>

Add ntfs3 tracepoints for iomap operations.

This adds trace events for ntfs_iomap_begin() and
ntfs_iomap_end() to help observe iomap mapping activity.

Signed-off-by: Baolin Liu <[email protected]>
---
 fs/ntfs3/inode.c             |  4 +++
 include/trace/events/ntfs3.h | 50 ++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index 2bc4ce2ee8d8..bccb3feb5f3b 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -744,6 +744,8 @@ static int ntfs_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
 	bool new_clst = false;
 	bool no_da;
 	bool zero = false;
+
+	trace_ntfs3_iomap_begin(inode, offset, length, flags);
 	if (unlikely(ntfs3_forced_shutdown(sbi->sb)))
 		return -EIO;
 
@@ -882,6 +884,8 @@ static int ntfs_iomap_end(struct inode *inode, loff_t pos, loff_t length,
 	struct ntfs_inode *ni = ntfs_i(inode);
 	loff_t endbyte = pos + written;
 
+	trace_ntfs3_iomap_end(inode, pos, length, written, flags);
+
 	if ((flags & IOMAP_WRITE) || (flags & IOMAP_ZERO)) {
 		if (iomap->type == IOMAP_INLINE) {
 			u32 data_size;
diff --git a/include/trace/events/ntfs3.h b/include/trace/events/ntfs3.h
index d16dd127ff2e..7a94c2788295 100644
--- a/include/trace/events/ntfs3.h
+++ b/include/trace/events/ntfs3.h
@@ -301,6 +301,56 @@ TRACE_EVENT(ntfs3_attr_data_get_block,
 		  __entry->zero, __entry->no_da)
 );
 
+TRACE_EVENT(ntfs3_iomap_begin,
+	TP_PROTO(struct inode *inode, loff_t offset, loff_t length,
+		 unsigned int flags),
+	TP_ARGS(inode, offset, length, flags),
+	TP_STRUCT__entry(
+		__field(unsigned long, ino)
+		__field(loff_t, offset)
+		__field(loff_t, length)
+		__field(dev_t, dev)
+		__field(unsigned int, flags)
+	),
+	TP_fast_assign(
+		__entry->ino = inode->i_ino;
+		__entry->offset = offset;
+		__entry->length = length;
+		__entry->dev = inode->i_sb->s_dev;
+		__entry->flags = flags;
+	),
+	TP_printk("dev=(%d,%d) ino=%lu offset=%lld length=%lld flags=0x%x",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->ino, __entry->offset, __entry->length,
+		  __entry->flags)
+);
+
+TRACE_EVENT(ntfs3_iomap_end,
+	TP_PROTO(struct inode *inode, loff_t pos, loff_t length,
+		 ssize_t written, unsigned int flags),
+	TP_ARGS(inode, pos, length, written, flags),
+	TP_STRUCT__entry(
+		__field(unsigned long, ino)
+		__field(loff_t, pos)
+		__field(loff_t, length)
+		__field(ssize_t, written)
+		__field(dev_t, dev)
+		__field(unsigned int, flags)
+	),
+	TP_fast_assign(
+		__entry->ino = inode->i_ino;
+		__entry->pos = pos;
+		__entry->length = length;
+		__entry->written = written;
+		__entry->dev = inode->i_sb->s_dev;
+		__entry->flags = flags;
+	),
+	TP_printk("dev=(%d,%d) ino=%lu pos=%lld length=%lld written=%zd flags=0x%x",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->ino, __entry->pos, __entry->length,
+		  __entry->written, __entry->flags)
+);
+
 #endif /* _TRACE_NTFS3_H */
 
 #include <trace/define_trace.h>
-- 
2.51.0