add rrw recursive mount test

Signed-off-by: lengrongfu <1275177125@qq.com>

tests/rust-integration-tests/integration_test/src/tests/mounts_recursive/mod.rs

@@ -243,16 +243,47 @@ fn check_recursive_noexec() -> TestResult {
     result
 }
 
+fn check_recursive_readwrite() -> TestResult {
+    let rrw_test_base_dir = PathBuf::from_str("/tmp").unwrap();
+    let rrw_dir_path = rrw_test_base_dir.join("rrw_dir");
+    let rrw_subdir_path = rrw_dir_path.join("rrw_subdir");
+    let mount_dest_path = PathBuf::from_str("/rrw").unwrap();
+
+    let mount_options = vec!["rbind".to_string(), "rrw".to_string()];
+    let mut mount_spec = Mount::default();
+    mount_spec
+        .set_destination(mount_dest_path)
+        .set_typ(None)
+        .set_source(Some(rrw_dir_path.clone()))
+        .set_options(Some(mount_options));
+    let spec = get_spec(
+        vec![mount_spec],
+        // check /rrw mount can write
+        vec!["touch".to_string(), "/rrw/a.txt".to_string()],
+    );
+
+    let result = test_inside_container(spec, &|_| {
+        setup_mount(&rrw_dir_path, &rrw_subdir_path);
+        Ok(())
+    });
+
+    clean_mount(&rrw_dir_path, &rrw_subdir_path);
+
+    result
+}
+
 pub fn get_mounts_recursive_test() -> TestGroup {
     let rro_test = Test::new("rro_test", Box::new(check_recursive_readonly));
     let rnosuid_test = Test::new("rnosuid_test", Box::new(check_recursive_nosuid));
     let rnoexec_test = Test::new("rnoexec_test", Box::new(check_recursive_noexec));
+    let rrw_test = Test::new("rrw_test", Box::new(check_recursive_readwrite));
 
     let mut tg = TestGroup::new("mounts_recursive");
     tg.add(vec![
         Box::new(rro_test),
         Box::new(rnosuid_test),
         Box::new(rnoexec_test),
+        Box::new(rrw_test),
     ]);
 
     tg