diff --git a/Checkpoint.cpp b/Checkpoint.cpp
index 8f86174..94a78eb 100644
--- a/Checkpoint.cpp
+++ b/Checkpoint.cpp
@@ -36,6 +36,7 @@
 #include <sys/mount.h>
 #include <sys/stat.h>
 
+using android::binder::Status;
 using android::hardware::hidl_string;
 using android::hardware::boot::V1_0::BoolResult;
 using android::hardware::boot::V1_0::IBootControl;
@@ -64,8 +65,8 @@
 
 }  // namespace
 
-bool cp_startCheckpoint(int retry) {
-    if (retry < -1) return false;
+Status cp_startCheckpoint(int retry) {
+    if (retry < -1) return Status::fromExceptionCode(EINVAL, "Retry count must be more than -1");
     std::string content = std::to_string(retry + 1);
     if (retry == -1) {
         sp<IBootControl> module = IBootControl::getService();
@@ -75,21 +76,24 @@
             if (module->getSuffix(module->getCurrentSlot(), cb).isOk()) content += " " + suffix;
         }
     }
-    return android::base::WriteStringToFile(content, kMetadataCPFile);
+    if (!android::base::WriteStringToFile(content, kMetadataCPFile))
+        return Status::fromExceptionCode(errno, "Failed to write checkpoint file");
+    return Status::ok();
 }
 
-bool cp_commitChanges() {
+Status cp_commitChanges() {
     // Must take action for list of mounted checkpointed things here
     // To do this, we walk the list of mounted file systems.
     // But we also need to get the matching fstab entries to see
     // the original flags
+    std::string err_str;
     auto fstab_default = std::unique_ptr<fstab, decltype(&fs_mgr_free_fstab)>{
         fs_mgr_read_fstab_default(), fs_mgr_free_fstab};
-    if (!fstab_default) return false;
+    if (!fstab_default) return Status::fromExceptionCode(EINVAL, "Failed to get fstab");
 
     auto mounts = std::unique_ptr<fstab, decltype(&fs_mgr_free_fstab)>{
         fs_mgr_read_fstab("/proc/mounts"), fs_mgr_free_fstab};
-    if (!mounts) return false;
+    if (!mounts) return Status::fromExceptionCode(EINVAL, "Failed to get /proc/mounts");
 
     // Walk mounted file systems
     for (int i = 0; i < mounts->num_entries; ++i) {
@@ -107,11 +111,14 @@
             setBowState(mount_rec->blk_device, "2");
         }
     }
-    return android::base::RemoveFileIfExists(kMetadataCPFile);
+    if (android::base::RemoveFileIfExists(kMetadataCPFile, &err_str))
+        return Status::fromExceptionCode(errno, err_str.c_str());
+    return Status::ok();
 }
 
-void cp_abortChanges() {
+Status cp_abortChanges() {
     android_reboot(ANDROID_RB_RESTART2, 0, nullptr);
+    return Status::ok();
 }
 
 bool cp_needsRollback() {
@@ -148,14 +155,14 @@
     return false;
 }
 
-bool cp_prepareCheckpoint() {
+Status cp_prepareCheckpoint() {
     auto fstab_default = std::unique_ptr<fstab, decltype(&fs_mgr_free_fstab)>{
         fs_mgr_read_fstab_default(), fs_mgr_free_fstab};
-    if (!fstab_default) return false;
+    if (!fstab_default) return Status::fromExceptionCode(EINVAL, "Failed to get fstab");
 
     auto mounts = std::unique_ptr<fstab, decltype(&fs_mgr_free_fstab)>{
         fs_mgr_read_fstab("/proc/mounts"), fs_mgr_free_fstab};
-    if (!mounts) return false;
+    if (!mounts) return Status::fromExceptionCode(EINVAL, "Failed to get /proc/mounts");
 
     for (int i = 0; i < mounts->num_entries; ++i) {
         const fstab_rec* mount_rec = &mounts->recs[i];
@@ -181,7 +188,7 @@
             setBowState(mount_rec->blk_device, "1");
         }
     }
-    return true;
+    return Status::ok();
 }
 
 namespace {
@@ -261,19 +268,19 @@
 
 }  // namespace
 
-bool cp_restoreCheckpoint(const std::string& blockDevice) {
-    LOG(ERROR) << "Restoring checkpoint on " << blockDevice;
+Status cp_restoreCheckpoint(const std::string& blockDevice) {
+    LOG(INFO) << "Restoring checkpoint on " << blockDevice;
     std::fstream device(blockDevice, std::ios::binary | std::ios::in | std::ios::out);
     if (!device) {
         PLOG(ERROR) << "Cannot open " << blockDevice;
-        return false;
+        return Status::fromExceptionCode(errno, ("Cannot open " + blockDevice).c_str());
     }
     char buffer[kBlockSize];
     device.read(buffer, kBlockSize);
     log_sector& ls = *(log_sector*)buffer;
     if (ls.magic != kMagic) {
         LOG(ERROR) << "No magic";
-        return false;
+        return Status::fromExceptionCode(EINVAL, "No magic");
     }
 
     LOG(INFO) << "Restoring " << ls.sequence << " log sectors";
@@ -285,12 +292,15 @@
         log_sector& ls = *(log_sector*)buffer;
         if (ls.magic != kMagic) {
             LOG(ERROR) << "No magic!";
-            return false;
+            return Status::fromExceptionCode(EINVAL, "No magic");
         }
 
         if ((int)ls.sequence != sequence) {
             LOG(ERROR) << "Expecting log sector " << sequence << " but got " << ls.sequence;
-            return false;
+            return Status::fromExceptionCode(
+                EINVAL, ("Expecting log sector " + std::to_string(sequence) + " but got " +
+                         std::to_string(ls.sequence))
+                            .c_str());
         }
 
         LOG(INFO) << "Restoring from log sector " << ls.sequence;
@@ -309,7 +319,7 @@
 
             if (le->checksum && checksum != le->checksum) {
                 LOG(ERROR) << "Checksums don't match " << std::hex << checksum;
-                return false;
+                return Status::fromExceptionCode(EINVAL, "Checksums don't match");
             }
 
             device.seekg(le->source * kSectorSize);
@@ -317,20 +327,33 @@
         }
     }
 
-    return true;
+    return Status::ok();
 }
 
-bool cp_markBootAttempt() {
+Status cp_markBootAttempt() {
     std::string oldContent, newContent;
     int retry = 0;
-    if (!android::base::ReadFileToString(kMetadataCPFile, &oldContent)) return false;
+    struct stat st;
+    int result = stat(kMetadataCPFile.c_str(), &st);
+
+    // If the file doesn't exist, we aren't managing a checkpoint retry counter
+    if (result != 0) return Status::ok();
+    if (!android::base::ReadFileToString(kMetadataCPFile, &oldContent)) {
+        PLOG(ERROR) << "Failed to read checkpoint file";
+        return Status::fromExceptionCode(errno, "Failed to read checkpoint file");
+    }
     std::string retryContent = oldContent.substr(0, oldContent.find_first_of(" "));
 
-    if (!android::base::ParseInt(retryContent, &retry)) return false;
-    if (retry > 0) retry--;
+    if (!android::base::ParseInt(retryContent, &retry))
+        return Status::fromExceptionCode(EINVAL, "Could not parse retry count");
+    if (retry > 0) {
+        retry--;
 
-    newContent = std::to_string(retry);
-    return android::base::WriteStringToFile(newContent, kMetadataCPFile);
+        newContent = std::to_string(retry);
+        if (!android::base::WriteStringToFile(newContent, kMetadataCPFile))
+            return Status::fromExceptionCode(errno, "Could not write checkpoint file");
+    }
+    return Status::ok();
 }
 
 }  // namespace vold
diff --git a/Checkpoint.h b/Checkpoint.h
index f3554cc..eac2f94 100644
--- a/Checkpoint.h
+++ b/Checkpoint.h
@@ -17,26 +17,27 @@
 #ifndef _CHECKPOINT_H
 #define _CHECKPOINT_H
 
+#include <binder/Status.h>
 #include <string>
 
 namespace android {
 namespace vold {
 
-bool cp_startCheckpoint(int retry);
+android::binder::Status cp_startCheckpoint(int retry);
 
-bool cp_commitChanges();
+android::binder::Status cp_commitChanges();
 
-void cp_abortChanges();
+android::binder::Status cp_abortChanges();
 
 bool cp_needsRollback();
 
 bool cp_needsCheckpoint();
 
-bool cp_prepareCheckpoint();
+android::binder::Status cp_prepareCheckpoint();
 
-bool cp_restoreCheckpoint(const std::string& mountPoint);
+android::binder::Status cp_restoreCheckpoint(const std::string& mountPoint);
 
-bool cp_markBootAttempt();
+android::binder::Status cp_markBootAttempt();
 
 }  // namespace vold
 }  // namespace android
diff --git a/VoldNativeService.cpp b/VoldNativeService.cpp
index f5cde42..11a9398 100644
--- a/VoldNativeService.cpp
+++ b/VoldNativeService.cpp
@@ -910,12 +910,11 @@
         VolumeManager::Instance()->destroySandboxForApp(packageName, appId, sandboxId, userId));
 }
 
-binder::Status VoldNativeService::startCheckpoint(int32_t retry, bool* _aidl_return) {
+binder::Status VoldNativeService::startCheckpoint(int32_t retry) {
     ENFORCE_UID(AID_SYSTEM);
     ACQUIRE_LOCK;
 
-    *_aidl_return = cp_startCheckpoint(retry);
-    return ok();
+    return cp_startCheckpoint(retry);
 }
 
 binder::Status VoldNativeService::needsRollback(bool* _aidl_return) {
@@ -934,46 +933,40 @@
     return ok();
 }
 
-binder::Status VoldNativeService::commitChanges(bool* _aidl_return) {
+binder::Status VoldNativeService::commitChanges() {
     ENFORCE_UID(AID_SYSTEM);
     ACQUIRE_LOCK;
 
-    *_aidl_return = cp_commitChanges();
-    return ok();
+    return cp_commitChanges();
 }
 
-binder::Status VoldNativeService::prepareCheckpoint(bool* _aidl_return) {
+binder::Status VoldNativeService::prepareCheckpoint() {
     ENFORCE_UID(AID_SYSTEM);
     ACQUIRE_LOCK;
 
-    *_aidl_return = cp_prepareCheckpoint();
-    return ok();
+    return cp_prepareCheckpoint();
 }
 
-binder::Status VoldNativeService::restoreCheckpoint(const std::string& mountPoint,
-                                                    bool* _aidl_return) {
+binder::Status VoldNativeService::restoreCheckpoint(const std::string& mountPoint) {
     ENFORCE_UID(AID_SYSTEM);
     CHECK_ARGUMENT_PATH(mountPoint);
     ACQUIRE_LOCK;
 
-    *_aidl_return = cp_restoreCheckpoint(mountPoint);
-    return ok();
+    return cp_restoreCheckpoint(mountPoint);
 }
 
-binder::Status VoldNativeService::markBootAttempt(bool* _aidl_return) {
+binder::Status VoldNativeService::markBootAttempt() {
     ENFORCE_UID(AID_SYSTEM);
     ACQUIRE_LOCK;
 
-    *_aidl_return = cp_markBootAttempt();
-    return ok();
+    return cp_markBootAttempt();
 }
 
 binder::Status VoldNativeService::abortChanges() {
     ENFORCE_UID(AID_SYSTEM);
     ACQUIRE_LOCK;
 
-    cp_abortChanges();
-    return ok();
+    return cp_abortChanges();
 }
 
 }  // namespace vold
diff --git a/VoldNativeService.h b/VoldNativeService.h
index 7f1d807..8a3ac00 100644
--- a/VoldNativeService.h
+++ b/VoldNativeService.h
@@ -121,13 +121,13 @@
     binder::Status destroySandboxForApp(const std::string& packageName, int32_t appId,
                                         const std::string& sandboxId, int32_t userId);
 
-    binder::Status startCheckpoint(int32_t retry, bool* _aidl_return);
+    binder::Status startCheckpoint(int32_t retry);
     binder::Status needsCheckpoint(bool* _aidl_return);
     binder::Status needsRollback(bool* _aidl_return);
-    binder::Status commitChanges(bool* _aidl_return);
-    binder::Status prepareCheckpoint(bool* _aidl_return);
-    binder::Status restoreCheckpoint(const std::string& mountPoint, bool* _aidl_return);
-    binder::Status markBootAttempt(bool* __aidl_return);
+    binder::Status commitChanges();
+    binder::Status prepareCheckpoint();
+    binder::Status restoreCheckpoint(const std::string& mountPoint);
+    binder::Status markBootAttempt();
     binder::Status abortChanges();
 };
 
diff --git a/binder/android/os/IVold.aidl b/binder/android/os/IVold.aidl
index 809b9a0..96301b3 100644
--- a/binder/android/os/IVold.aidl
+++ b/binder/android/os/IVold.aidl
@@ -104,14 +104,14 @@
     void destroySandboxForApp(in @utf8InCpp String packageName, int appId,
                               in @utf8InCpp String sandboxId, int userId);
 
-    boolean startCheckpoint(int retry);
+    void startCheckpoint(int retry);
     boolean needsCheckpoint();
     boolean needsRollback();
     void abortChanges();
-    boolean commitChanges();
-    boolean prepareCheckpoint();
-    boolean restoreCheckpoint(@utf8InCpp String device);
-    boolean markBootAttempt();
+    void commitChanges();
+    void prepareCheckpoint();
+    void restoreCheckpoint(@utf8InCpp String device);
+    void markBootAttempt();
 
     const int ENCRYPTION_FLAG_NO_UI = 4;
 
diff --git a/vdc.cpp b/vdc.cpp
index 6efd72c..e971d52 100644
--- a/vdc.cpp
+++ b/vdc.cpp
@@ -107,10 +107,8 @@
         checkStatus(vold->encryptFstab(args[2]));
     } else if (args[0] == "checkpoint" && args[1] == "startCheckpoint" && args.size() == 3) {
         int retry;
-        bool success = false;
         if (!android::base::ParseInt(args[2], &retry)) exit(EINVAL);
-        checkStatus(vold->startCheckpoint(retry, &success));
-        return success ? 1 : 0;
+        checkStatus(vold->startCheckpoint(retry));
     } else if (args[0] == "checkpoint" && args[1] == "needsCheckpoint" && args.size() == 2) {
         bool enabled = false;
         checkStatus(vold->needsCheckpoint(&enabled));
@@ -120,21 +118,13 @@
         checkStatus(vold->needsRollback(&enabled));
         return enabled ? 1 : 0;
     } else if (args[0] == "checkpoint" && args[1] == "commitChanges" && args.size() == 2) {
-        bool success = false;
-        checkStatus(vold->commitChanges(&success));
-        return success ? 1 : 0;
+        checkStatus(vold->commitChanges());
     } else if (args[0] == "checkpoint" && args[1] == "prepareCheckpoint" && args.size() == 2) {
-        bool success = false;
-        checkStatus(vold->prepareCheckpoint(&success));
-        return success ? 1 : 0;
+        checkStatus(vold->prepareCheckpoint());
     } else if (args[0] == "checkpoint" && args[1] == "restoreCheckpoint" && args.size() == 3) {
-        bool success = false;
-        checkStatus(vold->restoreCheckpoint(args[2], &success));
-        return success ? 1 : 0;
+        checkStatus(vold->restoreCheckpoint(args[2]));
     } else if (args[0] == "checkpoint" && args[1] == "markBootAttempt" && args.size() == 2) {
-        bool success = false;
-        checkStatus(vold->markBootAttempt(&success));
-        return success ? 1 : 0;
+        checkStatus(vold->markBootAttempt());
     } else if (args[0] == "checkpoint" && args[1] == "abortChanges" && args.size() == 2) {
         checkStatus(vold->abortChanges());
     } else {