[PATCH v3 2/4] ima: use fs method to read integrity data

diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index b21891a6bfca..d57c4259945d 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c

@@ -219,6 +219,7 @@ const struct file_operations ext2_file_operations = {
 	.get_unmapped_area = thp_get_unmapped_area,
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= iter_file_splice_write,
+	.integrity_read	= generic_file_read_iter,
 };
 
 const struct inode_operations ext2_file_inode_operations = {

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 831fd6beebf0..e7b2bd43cdc4 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c

@@ -753,6 +753,7 @@ const struct file_operations ext4_file_operations = {
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= iter_file_splice_write,
 	.fallocate	= ext4_fallocate,
+	.integrity_read	= ext4_file_read_iter,
 };

index c2062a108d19..9b49d09ba180 100644

--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c

@@ -1124,6 +1124,7 @@ const struct file_operations gfs2_file_fops = {
 	.splice_write	= gfs2_file_splice_write,
 	.setlease	= simple_nosetlease,
 	.fallocate	= gfs2_fallocate,
+	.integrity_read	= generic_file_read_iter,
 };
 
 const struct file_operations gfs2_dir_fops = {

@@ -1152,6 +1153,7 @@ const struct file_operations gfs2_file_fops_nolock = {
 	.splice_write	= gfs2_file_splice_write,
 	.setlease	= generic_setlease,
 	.fallocate	= gfs2_fallocate,
+	.integrity_read	= generic_file_read_iter,
 };
 
 const struct file_operations gfs2_dir_fops_nolock = {

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index bfeb647459d9..2832a7c92acd 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c

@@ -2536,6 +2536,7 @@ const struct file_operations ocfs2_fops = {
 	.fallocate	= ocfs2_fallocate,
 	.clone_file_range = ocfs2_file_clone_range,
 	.dedupe_file_range = ocfs2_file_dedupe_range,
+	.integrity_read	= ocfs2_file_read_iter,
 };
 
 const struct file_operations ocfs2_dops = {