diff --git a/Checkpoint.cpp b/Checkpoint.cpp
new file mode 100644
index 0000000..476b0ae
--- /dev/null
+++ b/Checkpoint.cpp
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "Checkpoint"
+#include "Checkpoint.h"
+
+#include <android-base/file.h>
+#include <android-base/parseint.h>
+#include <cutils/android_reboot.h>
+#include <fs_mgr.h>
+#include <mntent.h>
+#include <sys/mount.h>
+
+#include <list>
+#include <string>
+
+namespace android {
+namespace vold {
+
+static const std::string kMetadataCPFile = "/metadata/vold/checkpoint";
+
+bool cp_startCheckpoint(int retry) {
+    if (retry < -1) return false;
+    std::string content = std::to_string(retry);
+    return android::base::WriteStringToFile(content, kMetadataCPFile);
+}
+
+bool cp_commitChanges() {
+    struct fstab* fstab = fs_mgr_read_fstab_default();
+    if (!fstab) return false;
+
+    FILE* fp = setmntent("/proc/mounts", "r");
+    mntent* mentry;
+
+    if (fp == NULL) return false;
+
+    while ((mentry = getmntent(fp)) != NULL) {
+        auto test = std::string(mentry->mnt_dir) + "/";
+        for (int i = 0; i < fstab->num_entries; i++) {
+            if (!fs_mgr_is_checkpoint(&fstab->recs[i])) continue;
+
+            if (!strcmp(fstab->recs[i].mount_point, mentry->mnt_dir) &&
+                !strcmp(fstab->recs[i].fs_type, mentry->mnt_type)) {
+                if (!strcmp(fstab->recs[i].fs_type, "f2fs")) {
+                    mount(mentry->mnt_fsname, mentry->mnt_dir, "none",
+                          MS_REMOUNT | fstab->recs[i].flags, "checkpoint=enable");
+                }
+            }
+        }
+    }
+    endmntent(fp);
+
+    fs_mgr_free_fstab(fstab);
+    return android::base::RemoveFileIfExists(kMetadataCPFile);
+}
+
+void cp_abortChanges() {
+    android_reboot(ANDROID_RB_RESTART2, 0, nullptr);
+}
+
+bool cp_needRollback(const std::string& id) {
+    std::string content;
+    bool ret;
+
+    ret = android::base::ReadFileToString(kMetadataCPFile, &content);
+    if (ret) return content == "0";
+    return false;
+}
+
+bool cp_needsCheckpoint(void) {
+    bool ret;
+    std::string content;
+
+    ret = android::base::ReadFileToString(kMetadataCPFile, &content);
+    if (ret) return content != "0";
+    return false;
+}
+
+bool cp_prepareDriveForCheckpoint(const std::string& mountPoint) {
+    return false;
+}
+
+bool cp_markBootAttempt() {
+    std::string oldContent, newContent;
+    int retry = 0;
+    if (!android::base::ReadFileToString(kMetadataCPFile, &oldContent)) return false;
+
+    if (!android::base::ParseInt(oldContent, &retry)) return false;
+    if (retry > 0) retry--;
+
+    newContent = std::to_string(retry);
+    return android::base::WriteStringToFile(newContent, kMetadataCPFile);
+}
+
+}  // namespace vold
+}  // namespace android