[PATCH v4 3/7] ntfs3: add create inode tracepoint

[Baolin Liu <liubaolin12138@163.com>]

From: Baolin Liu <liubaolin@kylinos.cn>

Add an ntfs3 tracepoint for inode creation.

This adds a trace event for ntfs_create_inode() to help
observe inode creation activity.

Signed-off-by: Baolin Liu <liubaolin@kylinos.cn>
---
 fs/ntfs3/inode.c             |  3 +++
 include/trace/events/ntfs3.h | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index 0c9bd669117d..4c427ed69272 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -17,6 +17,7 @@
 #include "debug.h"
 #include "ntfs.h"
 #include "ntfs_fs.h"
+#include <trace/events/ntfs3.h>
 
 /*
  * ntfs_read_mft - Read record and parse MFT.
@@ -1203,6 +1204,8 @@ int ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir,
 	/* New file will be resident or non resident. */
 	const bool new_file_resident = 1;
 
+	trace_ntfs3_create_inode(dir, dentry);
+
 	if (!fnd)
 		ni_lock_dir(dir_ni);
 
diff --git a/include/trace/events/ntfs3.h b/include/trace/events/ntfs3.h
index a1e4bdb6ec59..67a2bde0266d 100644
--- a/include/trace/events/ntfs3.h
+++ b/include/trace/events/ntfs3.h
@@ -124,6 +124,24 @@ TRACE_EVENT(ntfs3_rename,
 		  __get_str(old_name), __get_str(new_name))
 );
 
+TRACE_EVENT(ntfs3_create_inode,
+	TP_PROTO(struct inode *dir, struct dentry *dentry),
+	TP_ARGS(dir, dentry),
+	TP_STRUCT__entry(
+		__field(unsigned long, parent_ino)
+		__field(dev_t, dev)
+		__string(name, dentry->d_name.name)
+	),
+	TP_fast_assign(
+		__entry->parent_ino = dir->i_ino;
+		__entry->dev = dir->i_sb->s_dev;
+		__assign_str(name);
+	),
+	TP_printk("dev=(%d,%d) parent=%lu name=%s",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->parent_ino, __get_str(name))
+);
+
 #endif /* _TRACE_NTFS3_H */
 
 #include <trace/define_trace.h>
-- 
2.51.0