Extend the bootcontrol HAL to get the active slot
The existing HAL has a setter, but no getter for the active slot for
next boot. The information is useful. For example, clients may need
to figure out which build the device will boot into.
In the resume on reboot case, we want to put the vbmeta digest
together with an encrypted key. And the vbmeta digest is associated
with a set of images (depending on which slot to boot into).
Bug: 173808057
Test: run vts test on cuttlefish
Change-Id: Ia8578926c781eb8e006589f45ab35a95dfe4f9a0
diff --git a/boot/1.2/default/BootControl.cpp b/boot/1.2/default/BootControl.cpp
new file mode 100644
index 0000000..c0bf02f
--- /dev/null
+++ b/boot/1.2/default/BootControl.cpp
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2020 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 "android.hardware.boot@1.2-impl"
+
+#include <memory>
+
+#include <log/log.h>
+
+#include "BootControl.h"
+
+namespace android {
+namespace hardware {
+namespace boot {
+namespace V1_2 {
+namespace implementation {
+
+using ::android::hardware::boot::V1_0::CommandResult;
+
+bool BootControl::Init() {
+ return impl_.Init();
+}
+
+// Methods from ::android::hardware::boot::V1_0::IBootControl.
+Return<uint32_t> BootControl::getNumberSlots() {
+ return impl_.GetNumberSlots();
+}
+
+Return<uint32_t> BootControl::getCurrentSlot() {
+ return impl_.GetCurrentSlot();
+}
+
+Return<void> BootControl::markBootSuccessful(markBootSuccessful_cb _hidl_cb) {
+ struct CommandResult cr;
+ if (impl_.MarkBootSuccessful()) {
+ cr.success = true;
+ cr.errMsg = "Success";
+ } else {
+ cr.success = false;
+ cr.errMsg = "Operation failed";
+ }
+ _hidl_cb(cr);
+ return Void();
+}
+
+Return<void> BootControl::setActiveBootSlot(uint32_t slot, setActiveBootSlot_cb _hidl_cb) {
+ struct CommandResult cr;
+ if (impl_.SetActiveBootSlot(slot)) {
+ cr.success = true;
+ cr.errMsg = "Success";
+ } else {
+ cr.success = false;
+ cr.errMsg = "Operation failed";
+ }
+ _hidl_cb(cr);
+ return Void();
+}
+
+Return<void> BootControl::setSlotAsUnbootable(uint32_t slot, setSlotAsUnbootable_cb _hidl_cb) {
+ struct CommandResult cr;
+ if (impl_.SetSlotAsUnbootable(slot)) {
+ cr.success = true;
+ cr.errMsg = "Success";
+ } else {
+ cr.success = false;
+ cr.errMsg = "Operation failed";
+ }
+ _hidl_cb(cr);
+ return Void();
+}
+
+Return<BoolResult> BootControl::isSlotBootable(uint32_t slot) {
+ if (!impl_.IsValidSlot(slot)) {
+ return BoolResult::INVALID_SLOT;
+ }
+ return impl_.IsSlotBootable(slot) ? BoolResult::TRUE : BoolResult::FALSE;
+}
+
+Return<BoolResult> BootControl::isSlotMarkedSuccessful(uint32_t slot) {
+ if (!impl_.IsValidSlot(slot)) {
+ return BoolResult::INVALID_SLOT;
+ }
+ return impl_.IsSlotMarkedSuccessful(slot) ? BoolResult::TRUE : BoolResult::FALSE;
+}
+
+Return<void> BootControl::getSuffix(uint32_t slot, getSuffix_cb _hidl_cb) {
+ hidl_string ans;
+ const char* suffix = impl_.GetSuffix(slot);
+ if (suffix) {
+ ans = suffix;
+ }
+ _hidl_cb(ans);
+ return Void();
+}
+
+// Methods from ::android::hardware::boot::V1_1::IBootControl.
+Return<bool> BootControl::setSnapshotMergeStatus(MergeStatus status) {
+ return impl_.SetSnapshotMergeStatus(status);
+}
+
+Return<MergeStatus> BootControl::getSnapshotMergeStatus() {
+ return impl_.GetSnapshotMergeStatus();
+}
+
+// Methods from ::android::hardware::boot::V1_2::IBootControl.
+Return<uint32_t> BootControl::getActiveBootSlot() {
+ return impl_.GetActiveBootSlot();
+}
+
+IBootControl* HIDL_FETCH_IBootControl(const char* /* hal */) {
+ auto module = std::make_unique<BootControl>();
+ if (!module->Init()) {
+ ALOGE("Could not initialize BootControl module");
+ return nullptr;
+ }
+ return module.release();
+}
+
+} // namespace implementation
+} // namespace V1_2
+} // namespace boot
+} // namespace hardware
+} // namespace android