| /* |
| * 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. |
| */ |
| |
| #include "commands.h" |
| |
| #include <inttypes.h> |
| #include <sys/socket.h> |
| #include <sys/un.h> |
| |
| #include <unordered_set> |
| |
| #include <android-base/logging.h> |
| #include <android-base/parseint.h> |
| #include <android-base/properties.h> |
| #include <android-base/stringprintf.h> |
| #include <android-base/strings.h> |
| #include <android-base/unique_fd.h> |
| #include <android/hardware/boot/1.1/IBootControl.h> |
| #include <cutils/android_reboot.h> |
| #include <ext4_utils/wipe.h> |
| #include <fs_mgr.h> |
| #include <fs_mgr/roots.h> |
| #include <libgsi/libgsi.h> |
| #include <liblp/builder.h> |
| #include <liblp/liblp.h> |
| #include <libsnapshot/snapshot.h> |
| #include <storage_literals/storage_literals.h> |
| #include <uuid/uuid.h> |
| |
| #include "constants.h" |
| #include "fastboot_device.h" |
| #include "flashing.h" |
| #include "utility.h" |
| |
| #ifdef FB_ENABLE_FETCH |
| static constexpr bool kEnableFetch = true; |
| #else |
| static constexpr bool kEnableFetch = false; |
| #endif |
| |
| using android::fs_mgr::MetadataBuilder; |
| using ::android::hardware::hidl_string; |
| using ::android::hardware::boot::V1_0::BoolResult; |
| using ::android::hardware::boot::V1_0::CommandResult; |
| using ::android::hardware::boot::V1_0::Slot; |
| using ::android::hardware::boot::V1_1::MergeStatus; |
| using ::android::hardware::fastboot::V1_0::Result; |
| using ::android::hardware::fastboot::V1_0::Status; |
| using android::snapshot::SnapshotManager; |
| using IBootControl1_1 = ::android::hardware::boot::V1_1::IBootControl; |
| |
| using namespace android::storage_literals; |
| |
| struct VariableHandlers { |
| // Callback to retrieve the value of a single variable. |
| std::function<bool(FastbootDevice*, const std::vector<std::string>&, std::string*)> get; |
| // Callback to retrieve all possible argument combinations, for getvar all. |
| std::function<std::vector<std::vector<std::string>>(FastbootDevice*)> get_all_args; |
| }; |
| |
| static bool IsSnapshotUpdateInProgress(FastbootDevice* device) { |
| auto hal = device->boot1_1(); |
| if (!hal) { |
| return false; |
| } |
| auto merge_status = hal->getSnapshotMergeStatus(); |
| return merge_status == MergeStatus::SNAPSHOTTED || merge_status == MergeStatus::MERGING; |
| } |
| |
| static bool IsProtectedPartitionDuringMerge(FastbootDevice* device, const std::string& name) { |
| static const std::unordered_set<std::string> ProtectedPartitionsDuringMerge = { |
| "userdata", "metadata", "misc"}; |
| if (ProtectedPartitionsDuringMerge.count(name) == 0) { |
| return false; |
| } |
| return IsSnapshotUpdateInProgress(device); |
| } |
| |
| static void GetAllVars(FastbootDevice* device, const std::string& name, |
| const VariableHandlers& handlers) { |
| if (!handlers.get_all_args) { |
| std::string message; |
| if (!handlers.get(device, std::vector<std::string>(), &message)) { |
| return; |
| } |
| device->WriteInfo(android::base::StringPrintf("%s:%s", name.c_str(), message.c_str())); |
| return; |
| } |
| |
| auto all_args = handlers.get_all_args(device); |
| for (const auto& args : all_args) { |
| std::string message; |
| if (!handlers.get(device, args, &message)) { |
| continue; |
| } |
| std::string arg_string = android::base::Join(args, ":"); |
| device->WriteInfo(android::base::StringPrintf("%s:%s:%s", name.c_str(), arg_string.c_str(), |
| message.c_str())); |
| } |
| } |
| |
| bool GetVarHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| const std::unordered_map<std::string, VariableHandlers> kVariableMap = { |
| {FB_VAR_VERSION, {GetVersion, nullptr}}, |
| {FB_VAR_VERSION_BOOTLOADER, {GetBootloaderVersion, nullptr}}, |
| {FB_VAR_VERSION_BASEBAND, {GetBasebandVersion, nullptr}}, |
| {FB_VAR_VERSION_OS, {GetOsVersion, nullptr}}, |
| {FB_VAR_VERSION_VNDK, {GetVndkVersion, nullptr}}, |
| {FB_VAR_PRODUCT, {GetProduct, nullptr}}, |
| {FB_VAR_SERIALNO, {GetSerial, nullptr}}, |
| {FB_VAR_VARIANT, {GetVariant, nullptr}}, |
| {FB_VAR_SECURE, {GetSecure, nullptr}}, |
| {FB_VAR_UNLOCKED, {GetUnlocked, nullptr}}, |
| {FB_VAR_MAX_DOWNLOAD_SIZE, {GetMaxDownloadSize, nullptr}}, |
| {FB_VAR_CURRENT_SLOT, {::GetCurrentSlot, nullptr}}, |
| {FB_VAR_SLOT_COUNT, {GetSlotCount, nullptr}}, |
| {FB_VAR_HAS_SLOT, {GetHasSlot, GetAllPartitionArgsNoSlot}}, |
| {FB_VAR_SLOT_SUCCESSFUL, {GetSlotSuccessful, nullptr}}, |
| {FB_VAR_SLOT_UNBOOTABLE, {GetSlotUnbootable, nullptr}}, |
| {FB_VAR_PARTITION_SIZE, {GetPartitionSize, GetAllPartitionArgsWithSlot}}, |
| {FB_VAR_PARTITION_TYPE, {GetPartitionType, GetAllPartitionArgsWithSlot}}, |
| {FB_VAR_IS_LOGICAL, {GetPartitionIsLogical, GetAllPartitionArgsWithSlot}}, |
| {FB_VAR_IS_USERSPACE, {GetIsUserspace, nullptr}}, |
| {FB_VAR_OFF_MODE_CHARGE_STATE, {GetOffModeChargeState, nullptr}}, |
| {FB_VAR_BATTERY_VOLTAGE, {GetBatteryVoltage, nullptr}}, |
| {FB_VAR_BATTERY_SOC_OK, {GetBatterySoCOk, nullptr}}, |
| {FB_VAR_HW_REVISION, {GetHardwareRevision, nullptr}}, |
| {FB_VAR_SUPER_PARTITION_NAME, {GetSuperPartitionName, nullptr}}, |
| {FB_VAR_SNAPSHOT_UPDATE_STATUS, {GetSnapshotUpdateStatus, nullptr}}, |
| {FB_VAR_CPU_ABI, {GetCpuAbi, nullptr}}, |
| {FB_VAR_SYSTEM_FINGERPRINT, {GetSystemFingerprint, nullptr}}, |
| {FB_VAR_VENDOR_FINGERPRINT, {GetVendorFingerprint, nullptr}}, |
| {FB_VAR_DYNAMIC_PARTITION, {GetDynamicPartition, nullptr}}, |
| {FB_VAR_FIRST_API_LEVEL, {GetFirstApiLevel, nullptr}}, |
| {FB_VAR_SECURITY_PATCH_LEVEL, {GetSecurityPatchLevel, nullptr}}, |
| {FB_VAR_TREBLE_ENABLED, {GetTrebleEnabled, nullptr}}, |
| {FB_VAR_MAX_FETCH_SIZE, {GetMaxFetchSize, nullptr}}, |
| }; |
| |
| if (args.size() < 2) { |
| return device->WriteFail("Missing argument"); |
| } |
| |
| // Special case: return all variables that we can. |
| if (args[1] == "all") { |
| for (const auto& [name, handlers] : kVariableMap) { |
| GetAllVars(device, name, handlers); |
| } |
| return device->WriteOkay(""); |
| } |
| |
| // args[0] is command name, args[1] is variable. |
| auto found_variable = kVariableMap.find(args[1]); |
| if (found_variable == kVariableMap.end()) { |
| return device->WriteFail("Unknown variable"); |
| } |
| |
| std::string message; |
| std::vector<std::string> getvar_args(args.begin() + 2, args.end()); |
| if (!found_variable->second.get(device, getvar_args, &message)) { |
| return device->WriteFail(message); |
| } |
| return device->WriteOkay(message); |
| } |
| |
| bool OemPostWipeData(FastbootDevice* device) { |
| auto fastboot_hal = device->fastboot_hal(); |
| if (!fastboot_hal) { |
| return false; |
| } |
| |
| Result ret; |
| auto ret_val = fastboot_hal->doOemSpecificErase([&](Result result) { ret = result; }); |
| if (!ret_val.isOk()) { |
| return false; |
| } |
| if (ret.status == Status::NOT_SUPPORTED) { |
| return false; |
| } else if (ret.status != Status::SUCCESS) { |
| device->WriteStatus(FastbootResult::FAIL, ret.message); |
| } else { |
| device->WriteStatus(FastbootResult::OKAY, "Erasing succeeded"); |
| } |
| |
| return true; |
| } |
| |
| bool EraseHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| if (args.size() < 2) { |
| return device->WriteStatus(FastbootResult::FAIL, "Invalid arguments"); |
| } |
| |
| if (GetDeviceLockStatus()) { |
| return device->WriteStatus(FastbootResult::FAIL, "Erase is not allowed on locked devices"); |
| } |
| |
| const auto& partition_name = args[1]; |
| if (IsProtectedPartitionDuringMerge(device, partition_name)) { |
| auto message = "Cannot erase " + partition_name + " while a snapshot update is in progress"; |
| return device->WriteFail(message); |
| } |
| |
| PartitionHandle handle; |
| if (!OpenPartition(device, partition_name, &handle)) { |
| return device->WriteStatus(FastbootResult::FAIL, "Partition doesn't exist"); |
| } |
| if (wipe_block_device(handle.fd(), get_block_device_size(handle.fd())) == 0) { |
| //Perform oem PostWipeData if Android userdata partition has been erased |
| bool support_oem_postwipedata = false; |
| if (partition_name == "userdata") { |
| support_oem_postwipedata = OemPostWipeData(device); |
| } |
| |
| if (!support_oem_postwipedata) { |
| return device->WriteStatus(FastbootResult::OKAY, "Erasing succeeded"); |
| } else { |
| //Write device status in OemPostWipeData(), so just return true |
| return true; |
| } |
| } |
| return device->WriteStatus(FastbootResult::FAIL, "Erasing failed"); |
| } |
| |
| bool OemCmdHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| auto fastboot_hal = device->fastboot_hal(); |
| if (!fastboot_hal) { |
| return device->WriteStatus(FastbootResult::FAIL, "Unable to open fastboot HAL"); |
| } |
| |
| //Disable "oem postwipedata userdata" to prevent user wipe oem userdata only. |
| if (args[0] == "oem postwipedata userdata") { |
| return device->WriteStatus(FastbootResult::FAIL, "Unable to do oem postwipedata userdata"); |
| } |
| |
| Result ret; |
| auto ret_val = fastboot_hal->doOemCommand(args[0], [&](Result result) { ret = result; }); |
| if (!ret_val.isOk()) { |
| return device->WriteStatus(FastbootResult::FAIL, "Unable to do OEM command"); |
| } |
| if (ret.status != Status::SUCCESS) { |
| return device->WriteStatus(FastbootResult::FAIL, ret.message); |
| } |
| |
| return device->WriteStatus(FastbootResult::OKAY, ret.message); |
| } |
| |
| bool DownloadHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| if (args.size() < 2) { |
| return device->WriteStatus(FastbootResult::FAIL, "size argument unspecified"); |
| } |
| |
| if (GetDeviceLockStatus()) { |
| return device->WriteStatus(FastbootResult::FAIL, |
| "Download is not allowed on locked devices"); |
| } |
| |
| // arg[0] is the command name, arg[1] contains size of data to be downloaded |
| unsigned int size; |
| if (!android::base::ParseUint("0x" + args[1], &size, kMaxDownloadSizeDefault)) { |
| return device->WriteStatus(FastbootResult::FAIL, "Invalid size"); |
| } |
| device->download_data().resize(size); |
| if (!device->WriteStatus(FastbootResult::DATA, android::base::StringPrintf("%08x", size))) { |
| return false; |
| } |
| |
| if (device->HandleData(true, &device->download_data())) { |
| return device->WriteStatus(FastbootResult::OKAY, ""); |
| } |
| |
| PLOG(ERROR) << "Couldn't download data"; |
| return device->WriteStatus(FastbootResult::FAIL, "Couldn't download data"); |
| } |
| |
| bool SetActiveHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| if (args.size() < 2) { |
| return device->WriteStatus(FastbootResult::FAIL, "Missing slot argument"); |
| } |
| |
| if (GetDeviceLockStatus()) { |
| return device->WriteStatus(FastbootResult::FAIL, |
| "set_active command is not allowed on locked devices"); |
| } |
| |
| Slot slot; |
| if (!GetSlotNumber(args[1], &slot)) { |
| // Slot suffix needs to be between 'a' and 'z'. |
| return device->WriteStatus(FastbootResult::FAIL, "Bad slot suffix"); |
| } |
| |
| // Non-A/B devices will not have a boot control HAL. |
| auto boot_control_hal = device->boot_control_hal(); |
| if (!boot_control_hal) { |
| return device->WriteStatus(FastbootResult::FAIL, |
| "Cannot set slot: boot control HAL absent"); |
| } |
| if (slot >= boot_control_hal->getNumberSlots()) { |
| return device->WriteStatus(FastbootResult::FAIL, "Slot out of range"); |
| } |
| |
| // If the slot is not changing, do nothing. |
| if (args[1] == device->GetCurrentSlot()) { |
| return device->WriteOkay(""); |
| } |
| |
| // Check how to handle the current snapshot state. |
| if (auto hal11 = device->boot1_1()) { |
| auto merge_status = hal11->getSnapshotMergeStatus(); |
| if (merge_status == MergeStatus::MERGING) { |
| return device->WriteFail("Cannot change slots while a snapshot update is in progress"); |
| } |
| // Note: we allow the slot change if the state is SNAPSHOTTED. First- |
| // stage init does not have access to the HAL, and uses the slot number |
| // and /metadata OTA state to determine whether a slot change occurred. |
| // Booting into the old slot would erase the OTA, and switching A->B->A |
| // would simply resume it if no boots occur in between. Re-flashing |
| // partitions implicitly cancels the OTA, so leaving the state as-is is |
| // safe. |
| if (merge_status == MergeStatus::SNAPSHOTTED) { |
| device->WriteInfo( |
| "Changing the active slot with a snapshot applied may cancel the" |
| " update."); |
| } |
| } |
| |
| CommandResult ret; |
| auto cb = [&ret](CommandResult result) { ret = result; }; |
| auto result = boot_control_hal->setActiveBootSlot(slot, cb); |
| if (result.isOk() && ret.success) { |
| // Save as slot suffix to match the suffix format as returned from |
| // the boot control HAL. |
| auto current_slot = "_" + args[1]; |
| device->set_active_slot(current_slot); |
| return device->WriteStatus(FastbootResult::OKAY, ""); |
| } |
| return device->WriteStatus(FastbootResult::FAIL, "Unable to set slot"); |
| } |
| |
| bool ShutDownHandler(FastbootDevice* device, const std::vector<std::string>& /* args */) { |
| auto result = device->WriteStatus(FastbootResult::OKAY, "Shutting down"); |
| android::base::SetProperty(ANDROID_RB_PROPERTY, "shutdown,fastboot"); |
| device->CloseDevice(); |
| TEMP_FAILURE_RETRY(pause()); |
| return result; |
| } |
| |
| bool RebootHandler(FastbootDevice* device, const std::vector<std::string>& /* args */) { |
| auto result = device->WriteStatus(FastbootResult::OKAY, "Rebooting"); |
| android::base::SetProperty(ANDROID_RB_PROPERTY, "reboot,from_fastboot"); |
| device->CloseDevice(); |
| TEMP_FAILURE_RETRY(pause()); |
| return result; |
| } |
| |
| bool RebootBootloaderHandler(FastbootDevice* device, const std::vector<std::string>& /* args */) { |
| auto result = device->WriteStatus(FastbootResult::OKAY, "Rebooting bootloader"); |
| android::base::SetProperty(ANDROID_RB_PROPERTY, "reboot,bootloader"); |
| device->CloseDevice(); |
| TEMP_FAILURE_RETRY(pause()); |
| return result; |
| } |
| |
| bool RebootFastbootHandler(FastbootDevice* device, const std::vector<std::string>& /* args */) { |
| auto result = device->WriteStatus(FastbootResult::OKAY, "Rebooting fastboot"); |
| android::base::SetProperty(ANDROID_RB_PROPERTY, "reboot,fastboot"); |
| device->CloseDevice(); |
| TEMP_FAILURE_RETRY(pause()); |
| return result; |
| } |
| |
| static bool EnterRecovery() { |
| const char msg_switch_to_recovery = 'r'; |
| |
| android::base::unique_fd sock(socket(AF_UNIX, SOCK_STREAM, 0)); |
| if (sock < 0) { |
| PLOG(ERROR) << "Couldn't create sock"; |
| return false; |
| } |
| |
| struct sockaddr_un addr = {.sun_family = AF_UNIX}; |
| strncpy(addr.sun_path, "/dev/socket/recovery", sizeof(addr.sun_path) - 1); |
| if (connect(sock.get(), (struct sockaddr*)&addr, sizeof(addr)) < 0) { |
| PLOG(ERROR) << "Couldn't connect to recovery"; |
| return false; |
| } |
| // Switch to recovery will not update the boot reason since it does not |
| // require a reboot. |
| auto ret = write(sock.get(), &msg_switch_to_recovery, sizeof(msg_switch_to_recovery)); |
| if (ret != sizeof(msg_switch_to_recovery)) { |
| PLOG(ERROR) << "Couldn't write message to switch to recovery"; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool RebootRecoveryHandler(FastbootDevice* device, const std::vector<std::string>& /* args */) { |
| auto status = true; |
| if (EnterRecovery()) { |
| status = device->WriteStatus(FastbootResult::OKAY, "Rebooting to recovery"); |
| } else { |
| status = device->WriteStatus(FastbootResult::FAIL, "Unable to reboot to recovery"); |
| } |
| device->CloseDevice(); |
| TEMP_FAILURE_RETRY(pause()); |
| return status; |
| } |
| |
| // Helper class for opening a handle to a MetadataBuilder and writing the new |
| // partition table to the same place it was read. |
| class PartitionBuilder { |
| public: |
| explicit PartitionBuilder(FastbootDevice* device, const std::string& partition_name); |
| |
| bool Write(); |
| bool Valid() const { return !!builder_; } |
| MetadataBuilder* operator->() const { return builder_.get(); } |
| |
| private: |
| FastbootDevice* device_; |
| std::string super_device_; |
| uint32_t slot_number_; |
| std::unique_ptr<MetadataBuilder> builder_; |
| }; |
| |
| PartitionBuilder::PartitionBuilder(FastbootDevice* device, const std::string& partition_name) |
| : device_(device) { |
| std::string slot_suffix = GetSuperSlotSuffix(device, partition_name); |
| slot_number_ = android::fs_mgr::SlotNumberForSlotSuffix(slot_suffix); |
| auto super_device = FindPhysicalPartition(fs_mgr_get_super_partition_name(slot_number_)); |
| if (!super_device) { |
| return; |
| } |
| super_device_ = *super_device; |
| builder_ = MetadataBuilder::New(super_device_, slot_number_); |
| } |
| |
| bool PartitionBuilder::Write() { |
| auto metadata = builder_->Export(); |
| if (!metadata) { |
| return false; |
| } |
| return UpdateAllPartitionMetadata(device_, super_device_, *metadata.get()); |
| } |
| |
| bool CreatePartitionHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| if (args.size() < 3) { |
| return device->WriteFail("Invalid partition name and size"); |
| } |
| |
| if (GetDeviceLockStatus()) { |
| return device->WriteStatus(FastbootResult::FAIL, "Command not available on locked devices"); |
| } |
| |
| uint64_t partition_size; |
| std::string partition_name = args[1]; |
| if (!android::base::ParseUint(args[2].c_str(), &partition_size)) { |
| return device->WriteFail("Invalid partition size"); |
| } |
| |
| PartitionBuilder builder(device, partition_name); |
| if (!builder.Valid()) { |
| return device->WriteFail("Could not open super partition"); |
| } |
| // TODO(112433293) Disallow if the name is in the physical table as well. |
| if (builder->FindPartition(partition_name)) { |
| return device->WriteFail("Partition already exists"); |
| } |
| |
| auto partition = builder->AddPartition(partition_name, 0); |
| if (!partition) { |
| return device->WriteFail("Failed to add partition"); |
| } |
| if (!builder->ResizePartition(partition, partition_size)) { |
| builder->RemovePartition(partition_name); |
| return device->WriteFail("Not enough space for partition"); |
| } |
| if (!builder.Write()) { |
| return device->WriteFail("Failed to write partition table"); |
| } |
| return device->WriteOkay("Partition created"); |
| } |
| |
| bool DeletePartitionHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| if (args.size() < 2) { |
| return device->WriteFail("Invalid partition name and size"); |
| } |
| |
| if (GetDeviceLockStatus()) { |
| return device->WriteStatus(FastbootResult::FAIL, "Command not available on locked devices"); |
| } |
| |
| std::string partition_name = args[1]; |
| |
| PartitionBuilder builder(device, partition_name); |
| if (!builder.Valid()) { |
| return device->WriteFail("Could not open super partition"); |
| } |
| builder->RemovePartition(partition_name); |
| if (!builder.Write()) { |
| return device->WriteFail("Failed to write partition table"); |
| } |
| return device->WriteOkay("Partition deleted"); |
| } |
| |
| bool ResizePartitionHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| if (args.size() < 3) { |
| return device->WriteFail("Invalid partition name and size"); |
| } |
| |
| if (GetDeviceLockStatus()) { |
| return device->WriteStatus(FastbootResult::FAIL, "Command not available on locked devices"); |
| } |
| |
| uint64_t partition_size; |
| std::string partition_name = args[1]; |
| if (!android::base::ParseUint(args[2].c_str(), &partition_size)) { |
| return device->WriteFail("Invalid partition size"); |
| } |
| |
| PartitionBuilder builder(device, partition_name); |
| if (!builder.Valid()) { |
| return device->WriteFail("Could not open super partition"); |
| } |
| |
| auto partition = builder->FindPartition(partition_name); |
| if (!partition) { |
| return device->WriteFail("Partition does not exist"); |
| } |
| |
| // Remove the updated flag to cancel any snapshots. |
| uint32_t attrs = partition->attributes(); |
| partition->set_attributes(attrs & ~LP_PARTITION_ATTR_UPDATED); |
| |
| if (!builder->ResizePartition(partition, partition_size)) { |
| return device->WriteFail("Not enough space to resize partition"); |
| } |
| if (!builder.Write()) { |
| return device->WriteFail("Failed to write partition table"); |
| } |
| return device->WriteOkay("Partition resized"); |
| } |
| |
| void CancelPartitionSnapshot(FastbootDevice* device, const std::string& partition_name) { |
| PartitionBuilder builder(device, partition_name); |
| if (!builder.Valid()) return; |
| |
| auto partition = builder->FindPartition(partition_name); |
| if (!partition) return; |
| |
| // Remove the updated flag to cancel any snapshots. |
| uint32_t attrs = partition->attributes(); |
| partition->set_attributes(attrs & ~LP_PARTITION_ATTR_UPDATED); |
| |
| builder.Write(); |
| } |
| |
| bool FlashHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| if (args.size() < 2) { |
| return device->WriteStatus(FastbootResult::FAIL, "Invalid arguments"); |
| } |
| |
| if (GetDeviceLockStatus()) { |
| return device->WriteStatus(FastbootResult::FAIL, |
| "Flashing is not allowed on locked devices"); |
| } |
| |
| const auto& partition_name = args[1]; |
| if (IsProtectedPartitionDuringMerge(device, partition_name)) { |
| auto message = "Cannot flash " + partition_name + " while a snapshot update is in progress"; |
| return device->WriteFail(message); |
| } |
| |
| if (LogicalPartitionExists(device, partition_name)) { |
| CancelPartitionSnapshot(device, partition_name); |
| } |
| |
| int ret = Flash(device, partition_name); |
| if (ret < 0) { |
| return device->WriteStatus(FastbootResult::FAIL, strerror(-ret)); |
| } |
| return device->WriteStatus(FastbootResult::OKAY, "Flashing succeeded"); |
| } |
| |
| bool UpdateSuperHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| if (args.size() < 2) { |
| return device->WriteFail("Invalid arguments"); |
| } |
| |
| if (GetDeviceLockStatus()) { |
| return device->WriteStatus(FastbootResult::FAIL, "Command not available on locked devices"); |
| } |
| |
| bool wipe = (args.size() >= 3 && args[2] == "wipe"); |
| return UpdateSuper(device, args[1], wipe); |
| } |
| |
| bool GsiHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| if (args.size() != 2) { |
| return device->WriteFail("Invalid arguments"); |
| } |
| |
| AutoMountMetadata mount_metadata; |
| if (!mount_metadata) { |
| return device->WriteFail("Could not find GSI install"); |
| } |
| |
| if (!android::gsi::IsGsiInstalled()) { |
| return device->WriteStatus(FastbootResult::FAIL, "No GSI is installed"); |
| } |
| |
| if (args[1] == "wipe") { |
| if (!android::gsi::UninstallGsi()) { |
| return device->WriteStatus(FastbootResult::FAIL, strerror(errno)); |
| } |
| } else if (args[1] == "disable") { |
| if (!android::gsi::DisableGsi()) { |
| return device->WriteStatus(FastbootResult::FAIL, strerror(errno)); |
| } |
| } |
| return device->WriteStatus(FastbootResult::OKAY, "Success"); |
| } |
| |
| bool SnapshotUpdateHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| // Note that we use the HAL rather than mounting /metadata, since we want |
| // our results to match the bootloader. |
| auto hal = device->boot1_1(); |
| if (!hal) return device->WriteFail("Not supported"); |
| |
| // If no arguments, return the same thing as a getvar. Note that we get the |
| // HAL first so we can return "not supported" before we return the less |
| // specific error message below. |
| if (args.size() < 2 || args[1].empty()) { |
| std::string message; |
| if (!GetSnapshotUpdateStatus(device, {}, &message)) { |
| return device->WriteFail("Could not determine update status"); |
| } |
| device->WriteInfo(message); |
| return device->WriteOkay(""); |
| } |
| |
| MergeStatus status = hal->getSnapshotMergeStatus(); |
| |
| if (args.size() != 2) { |
| return device->WriteFail("Invalid arguments"); |
| } |
| if (args[1] == "cancel") { |
| switch (status) { |
| case MergeStatus::SNAPSHOTTED: |
| case MergeStatus::MERGING: |
| hal->setSnapshotMergeStatus(MergeStatus::CANCELLED); |
| break; |
| default: |
| break; |
| } |
| } else if (args[1] == "merge") { |
| if (status != MergeStatus::MERGING) { |
| return device->WriteFail("No snapshot merge is in progress"); |
| } |
| |
| auto sm = SnapshotManager::New(); |
| if (!sm) { |
| return device->WriteFail("Unable to create SnapshotManager"); |
| } |
| if (!sm->FinishMergeInRecovery()) { |
| return device->WriteFail("Unable to finish snapshot merge"); |
| } |
| } else { |
| return device->WriteFail("Invalid parameter to snapshot-update"); |
| } |
| return device->WriteStatus(FastbootResult::OKAY, "Success"); |
| } |
| |
| namespace { |
| // Helper of FetchHandler. |
| class PartitionFetcher { |
| public: |
| static bool Fetch(FastbootDevice* device, const std::vector<std::string>& args) { |
| if constexpr (!kEnableFetch) { |
| return device->WriteFail("Fetch is not allowed on user build"); |
| } |
| |
| if (GetDeviceLockStatus()) { |
| return device->WriteFail("Fetch is not allowed on locked devices"); |
| } |
| |
| PartitionFetcher fetcher(device, args); |
| if (fetcher.Open()) { |
| fetcher.Fetch(); |
| } |
| CHECK(fetcher.ret_.has_value()); |
| return *fetcher.ret_; |
| } |
| |
| private: |
| PartitionFetcher(FastbootDevice* device, const std::vector<std::string>& args) |
| : device_(device), args_(&args) {} |
| // Return whether the partition is successfully opened. |
| // If successfully opened, ret_ is left untouched. Otherwise, ret_ is set to the value |
| // that FetchHandler should return. |
| bool Open() { |
| if (args_->size() < 2) { |
| ret_ = device_->WriteFail("Missing partition arg"); |
| return false; |
| } |
| |
| partition_name_ = args_->at(1); |
| if (std::find(kAllowedPartitions.begin(), kAllowedPartitions.end(), partition_name_) == |
| kAllowedPartitions.end()) { |
| ret_ = device_->WriteFail("Fetch is only allowed on [" + |
| android::base::Join(kAllowedPartitions, ", ") + "]"); |
| return false; |
| } |
| |
| if (!OpenPartition(device_, partition_name_, &handle_, O_RDONLY)) { |
| ret_ = device_->WriteFail( |
| android::base::StringPrintf("Cannot open %s", partition_name_.c_str())); |
| return false; |
| } |
| |
| partition_size_ = get_block_device_size(handle_.fd()); |
| if (partition_size_ == 0) { |
| ret_ = device_->WriteOkay(android::base::StringPrintf("Partition %s has size 0", |
| partition_name_.c_str())); |
| return false; |
| } |
| |
| start_offset_ = 0; |
| if (args_->size() >= 3) { |
| if (!android::base::ParseUint(args_->at(2), &start_offset_)) { |
| ret_ = device_->WriteFail("Invalid offset, must be integer"); |
| return false; |
| } |
| if (start_offset_ > std::numeric_limits<off64_t>::max()) { |
| ret_ = device_->WriteFail( |
| android::base::StringPrintf("Offset overflows: %" PRIx64, start_offset_)); |
| return false; |
| } |
| } |
| if (start_offset_ > partition_size_) { |
| ret_ = device_->WriteFail(android::base::StringPrintf( |
| "Invalid offset 0x%" PRIx64 ", partition %s has size 0x%" PRIx64, start_offset_, |
| partition_name_.c_str(), partition_size_)); |
| return false; |
| } |
| uint64_t maximum_total_size_to_read = partition_size_ - start_offset_; |
| total_size_to_read_ = maximum_total_size_to_read; |
| if (args_->size() >= 4) { |
| if (!android::base::ParseUint(args_->at(3), &total_size_to_read_)) { |
| ret_ = device_->WriteStatus(FastbootResult::FAIL, "Invalid size, must be integer"); |
| return false; |
| } |
| } |
| if (total_size_to_read_ == 0) { |
| ret_ = device_->WriteOkay("Read 0 bytes"); |
| return false; |
| } |
| if (total_size_to_read_ > maximum_total_size_to_read) { |
| ret_ = device_->WriteFail(android::base::StringPrintf( |
| "Invalid size to read 0x%" PRIx64 ", partition %s has size 0x%" PRIx64 |
| " and fetching from offset 0x%" PRIx64, |
| total_size_to_read_, partition_name_.c_str(), partition_size_, start_offset_)); |
| return false; |
| } |
| |
| if (total_size_to_read_ > kMaxFetchSizeDefault) { |
| ret_ = device_->WriteFail(android::base::StringPrintf( |
| "Cannot fetch 0x%" PRIx64 |
| " bytes because it exceeds maximum transport size 0x%x", |
| partition_size_, kMaxDownloadSizeDefault)); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| // Assume Open() returns true. |
| // After execution, ret_ is set to the value that FetchHandler should return. |
| void Fetch() { |
| CHECK(start_offset_ <= std::numeric_limits<off64_t>::max()); |
| if (lseek64(handle_.fd(), start_offset_, SEEK_SET) != static_cast<off64_t>(start_offset_)) { |
| ret_ = device_->WriteFail(android::base::StringPrintf( |
| "On partition %s, unable to lseek(0x%" PRIx64 ": %s", partition_name_.c_str(), |
| start_offset_, strerror(errno))); |
| return; |
| } |
| |
| if (!device_->WriteStatus(FastbootResult::DATA, |
| android::base::StringPrintf( |
| "%08x", static_cast<uint32_t>(total_size_to_read_)))) { |
| ret_ = false; |
| return; |
| } |
| uint64_t end_offset = start_offset_ + total_size_to_read_; |
| std::vector<char> buf(1_MiB); |
| uint64_t current_offset = start_offset_; |
| while (current_offset < end_offset) { |
| // On any error, exit. We can't return a status message to the driver because |
| // we are in the middle of writing data, so just let the driver guess what's wrong |
| // by ending the data stream prematurely. |
| uint64_t remaining = end_offset - current_offset; |
| uint64_t chunk_size = std::min<uint64_t>(buf.size(), remaining); |
| if (!android::base::ReadFully(handle_.fd(), buf.data(), chunk_size)) { |
| PLOG(ERROR) << std::hex << "Unable to read 0x" << chunk_size << " bytes from " |
| << partition_name_ << " @ offset 0x" << current_offset; |
| ret_ = false; |
| return; |
| } |
| if (!device_->HandleData(false /* is read */, buf.data(), chunk_size)) { |
| PLOG(ERROR) << std::hex << "Unable to send 0x" << chunk_size << " bytes of " |
| << partition_name_ << " @ offset 0x" << current_offset; |
| ret_ = false; |
| return; |
| } |
| current_offset += chunk_size; |
| } |
| |
| ret_ = device_->WriteOkay(android::base::StringPrintf( |
| "Fetched %s (offset=0x%" PRIx64 ", size=0x%" PRIx64, partition_name_.c_str(), |
| start_offset_, total_size_to_read_)); |
| } |
| |
| static constexpr std::array<const char*, 3> kAllowedPartitions{ |
| "vendor_boot", |
| "vendor_boot_a", |
| "vendor_boot_b", |
| }; |
| |
| FastbootDevice* device_; |
| const std::vector<std::string>* args_ = nullptr; |
| std::string partition_name_; |
| PartitionHandle handle_; |
| uint64_t partition_size_ = 0; |
| uint64_t start_offset_ = 0; |
| uint64_t total_size_to_read_ = 0; |
| |
| // What FetchHandler should return. |
| std::optional<bool> ret_ = std::nullopt; |
| }; |
| } // namespace |
| |
| bool FetchHandler(FastbootDevice* device, const std::vector<std::string>& args) { |
| return PartitionFetcher::Fetch(device, args); |
| } |