From 5aef2826327a08d1f1ffa29ff9041c87c3898a69 Mon Sep 17 00:00:00 2001
From: Hou Tao <houtao1@huawei.com>
Date: Mon, 23 May 2022 21:18:16 +0800
Subject: [PATCH] ext4: add trace for the read and release of regular file

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4H3JT
CVE: NA
backport: openEuler-22.03-LTS

---------------------------

Use fs_file_read_do_trace() and trace_fs_file_release() to do that.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Acked-by: fang wei <fangwei1@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
---
 fs/ext4/file.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 3b09ddbe8970..6f78f7fbf419 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -30,6 +30,7 @@
 #include <linux/uio.h>
 #include <linux/mman.h>
 #include <linux/backing-dev.h>
+#include <trace/events/fs.h>
 #include "ext4.h"
 #include "ext4_jbd2.h"
 #include "xattr.h"
@@ -128,6 +129,7 @@ static ssize_t ext4_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 	if (iocb->ki_flags & IOCB_DIRECT)
 		return ext4_dio_read_iter(iocb, to);
 
+	fs_file_read_do_trace(iocb);
 	return generic_file_read_iter(iocb, to);
 }
 
@@ -138,6 +140,8 @@ static ssize_t ext4_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
  */
 static int ext4_release_file(struct inode *inode, struct file *filp)
 {
+	trace_fs_file_release(inode, filp);
+
 	if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE)) {
 		ext4_alloc_da_blocks(inode);
 		ext4_clear_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE);
-- 
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