Add vdc checkpoint supportsBlockCheckpoint

Also add vdc checkpoint supportsFileCheckpoint
This is to allow tests to be specific to supported checkpoint mode.

Test: Built on Taimen and Crosshatch, made sure both new functions work
as expected

Change-Id: I0eab7453b13c0a2e31840ef9ad24a692cec55b00

Checkpoint.cpp

@@ -84,6 +84,30 @@ Status cp_supportsCheckpoint(bool& result) {
     return Status::ok();
 }
 
+Status cp_supportsBlockCheckpoint(bool& result) {
+    result = false;
+
+    for (const auto& entry : fstab_default) {
+        if (entry.fs_mgr_flags.checkpoint_blk) {
+            result = true;
+            return Status::ok();
+        }
+    }
+    return Status::ok();
+}
+
+Status cp_supportsFileCheckpoint(bool& result) {
+    result = false;
+
+    for (const auto& entry : fstab_default) {
+        if (entry.fs_mgr_flags.checkpoint_fs) {
+            result = true;
+            return Status::ok();
+        }
+    }
+    return Status::ok();
+}
+
 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);

Checkpoint.h

@@ -25,6 +25,10 @@ namespace vold {
 
 android::binder::Status cp_supportsCheckpoint(bool& result);
 
+android::binder::Status cp_supportsBlockCheckpoint(bool& result);
+
+android::binder::Status cp_supportsFileCheckpoint(bool& result);
+
 android::binder::Status cp_startCheckpoint(int retry);
 
 android::binder::Status cp_commitChanges();

VoldNativeService.cpp

@@ -879,5 +879,19 @@ binder::Status VoldNativeService::supportsCheckpoint(bool* _aidl_return) {
     return cp_supportsCheckpoint(*_aidl_return);
 }
 
+binder::Status VoldNativeService::supportsBlockCheckpoint(bool* _aidl_return) {
+    ENFORCE_UID(AID_SYSTEM);
+    ACQUIRE_LOCK;
+
+    return cp_supportsBlockCheckpoint(*_aidl_return);
+}
+
+binder::Status VoldNativeService::supportsFileCheckpoint(bool* _aidl_return) {
+    ENFORCE_UID(AID_SYSTEM);
+    ACQUIRE_LOCK;
+
+    return cp_supportsFileCheckpoint(*_aidl_return);
+}
+
 }  // namespace vold
 }  // namespace android

VoldNativeService.h

@@ -131,6 +131,8 @@ class VoldNativeService : public BinderService<VoldNativeService>, public os::Bn
     binder::Status markBootAttempt();
     binder::Status abortChanges();
     binder::Status supportsCheckpoint(bool* _aidl_return);
+    binder::Status supportsBlockCheckpoint(bool* _aidl_return);
+    binder::Status supportsFileCheckpoint(bool* _aidl_return);
 };
 
 }  // namespace vold

binder/android/os/IVold.aidl

@@ -106,6 +106,8 @@ interface IVold {
     void restoreCheckpointPart(@utf8InCpp String device, int count);
     void markBootAttempt();
     boolean supportsCheckpoint();
+    boolean supportsBlockCheckpoint();
+    boolean supportsFileCheckpoint();
 
     @utf8InCpp String createStubVolume(@utf8InCpp String sourcePath,
             @utf8InCpp String mountPath, @utf8InCpp String fsType,

vdc.cpp

@@ -109,6 +109,14 @@ int main(int argc, char** argv) {
         bool supported = false;
         checkStatus(vold->supportsCheckpoint(&supported));
         return supported ? 1 : 0;
+    } else if (args[0] == "checkpoint" && args[1] == "supportsBlockCheckpoint" && args.size() == 2) {
+        bool supported = false;
+        checkStatus(vold->supportsBlockCheckpoint(&supported));
+        return supported ? 1 : 0;
+    } else if (args[0] == "checkpoint" && args[1] == "supportsFileCheckpoint" && args.size() == 2) {
+        bool supported = false;
+        checkStatus(vold->supportsFileCheckpoint(&supported));
+        return supported ? 1 : 0;
     } else if (args[0] == "checkpoint" && args[1] == "startCheckpoint" && args.size() == 3) {
         int retry;
         if (!android::base::ParseInt(args[2], &retry)) exit(EINVAL);