| // |
| // Copyright (C) 2011 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 "update_engine/common/download_action.h" |
| |
| #include <errno.h> |
| |
| #include <algorithm> |
| #include <string> |
| |
| #include <base/files/file_path.h> |
| #include <base/metrics/statistics_recorder.h> |
| #include <base/strings/stringprintf.h> |
| |
| #include "update_engine/common/action_pipe.h" |
| #include "update_engine/common/boot_control_interface.h" |
| #include "update_engine/common/error_code_utils.h" |
| #include "update_engine/common/multi_range_http_fetcher.h" |
| #include "update_engine/common/prefs_interface.h" |
| #include "update_engine/common/utils.h" |
| |
| using base::FilePath; |
| using std::string; |
| |
| namespace chromeos_update_engine { |
| |
| DownloadAction::DownloadAction(PrefsInterface* prefs, |
| BootControlInterface* boot_control, |
| HardwareInterface* hardware, |
| HttpFetcher* http_fetcher, |
| bool interactive) |
| : prefs_(prefs), |
| boot_control_(boot_control), |
| hardware_(hardware), |
| http_fetcher_(new MultiRangeHttpFetcher(http_fetcher)), |
| interactive_(interactive), |
| code_(ErrorCode::kSuccess), |
| delegate_(nullptr) {} |
| |
| DownloadAction::~DownloadAction() {} |
| |
| void DownloadAction::PerformAction() { |
| http_fetcher_->set_delegate(this); |
| |
| // Get the InstallPlan and read it |
| CHECK(HasInputObject()); |
| install_plan_ = GetInputObject(); |
| install_plan_.Dump(); |
| |
| bytes_received_ = 0; |
| bytes_received_previous_payloads_ = 0; |
| bytes_total_ = 0; |
| for (const auto& payload : install_plan_.payloads) |
| bytes_total_ += payload.size; |
| |
| if (install_plan_.is_resume) { |
| int64_t payload_index = 0; |
| if (prefs_->GetInt64(kPrefsUpdateStatePayloadIndex, &payload_index) && |
| static_cast<size_t>(payload_index) < install_plan_.payloads.size()) { |
| // Save the index for the resume payload before downloading any previous |
| // payload, otherwise it will be overwritten. |
| resume_payload_index_ = payload_index; |
| for (int i = 0; i < payload_index; i++) |
| install_plan_.payloads[i].already_applied = true; |
| } |
| } |
| CHECK_GE(install_plan_.payloads.size(), 1UL); |
| if (!payload_) |
| payload_ = &install_plan_.payloads[0]; |
| |
| LOG(INFO) << "Marking new slot as unbootable"; |
| if (!boot_control_->MarkSlotUnbootable(install_plan_.target_slot)) { |
| LOG(WARNING) << "Unable to mark new slot " |
| << BootControlInterface::SlotName(install_plan_.target_slot) |
| << ". Proceeding with the update anyway."; |
| } |
| |
| StartDownloading(); |
| } |
| |
| bool DownloadAction::LoadCachedManifest(int64_t manifest_size) { |
| std::string cached_manifest_bytes; |
| if (!prefs_->GetString(kPrefsManifestBytes, &cached_manifest_bytes) || |
| cached_manifest_bytes.size() <= 0) { |
| LOG(INFO) << "Cached Manifest data not found"; |
| return false; |
| } |
| if (static_cast<int64_t>(cached_manifest_bytes.size()) != manifest_size) { |
| LOG(WARNING) << "Cached metadata has unexpected size: " |
| << cached_manifest_bytes.size() << " vs. " << manifest_size; |
| return false; |
| } |
| |
| ErrorCode error; |
| const bool success = |
| delta_performer_->Write( |
| cached_manifest_bytes.data(), cached_manifest_bytes.size(), &error) && |
| delta_performer_->IsManifestValid(); |
| if (success) { |
| LOG(INFO) << "Successfully parsed cached manifest"; |
| } else { |
| // If parsing of cached data failed, fall back to fetch them using HTTP |
| LOG(WARNING) << "Cached manifest data fails to load, error code:" |
| << static_cast<int>(error) << "," << error; |
| } |
| return success; |
| } |
| |
| void DownloadAction::StartDownloading() { |
| download_active_ = true; |
| http_fetcher_->ClearRanges(); |
| |
| if (delta_performer_ != nullptr) { |
| LOG(INFO) << "Using writer for test."; |
| } else { |
| delta_performer_.reset(new DeltaPerformer(prefs_, |
| boot_control_, |
| hardware_, |
| delegate_, |
| &install_plan_, |
| payload_, |
| interactive_)); |
| } |
| |
| if (install_plan_.is_resume && |
| payload_ == &install_plan_.payloads[resume_payload_index_]) { |
| // Resuming an update so parse the cached manifest first |
| int64_t manifest_metadata_size = 0; |
| int64_t manifest_signature_size = 0; |
| prefs_->GetInt64(kPrefsManifestMetadataSize, &manifest_metadata_size); |
| prefs_->GetInt64(kPrefsManifestSignatureSize, &manifest_signature_size); |
| |
| // TODO(zhangkelvin) Add unittest for success and fallback route |
| if (!LoadCachedManifest(manifest_metadata_size + manifest_signature_size)) { |
| if (delta_performer_) { |
| // Create a new DeltaPerformer to reset all its state |
| delta_performer_ = std::make_unique<DeltaPerformer>(prefs_, |
| boot_control_, |
| hardware_, |
| delegate_, |
| &install_plan_, |
| payload_, |
| interactive_); |
| } |
| http_fetcher_->AddRange(base_offset_, |
| manifest_metadata_size + manifest_signature_size); |
| } |
| |
| // If there're remaining unprocessed data blobs, fetch them. Be careful |
| // not to request data beyond the end of the payload to avoid 416 HTTP |
| // response error codes. |
| int64_t next_data_offset = 0; |
| prefs_->GetInt64(kPrefsUpdateStateNextDataOffset, &next_data_offset); |
| uint64_t resume_offset = |
| manifest_metadata_size + manifest_signature_size + next_data_offset; |
| if (!payload_->size) { |
| http_fetcher_->AddRange(base_offset_ + resume_offset); |
| } else if (resume_offset < payload_->size) { |
| http_fetcher_->AddRange(base_offset_ + resume_offset, |
| payload_->size - resume_offset); |
| } |
| } else { |
| if (payload_->size) { |
| http_fetcher_->AddRange(base_offset_, payload_->size); |
| } else { |
| // If no payload size is passed we assume we read until the end of the |
| // stream. |
| http_fetcher_->AddRange(base_offset_); |
| } |
| } |
| |
| http_fetcher_->BeginTransfer(install_plan_.download_url); |
| } |
| |
| void DownloadAction::SuspendAction() { |
| http_fetcher_->Pause(); |
| } |
| |
| void DownloadAction::ResumeAction() { |
| http_fetcher_->Unpause(); |
| } |
| |
| void DownloadAction::TerminateProcessing() { |
| if (delta_performer_) { |
| delta_performer_->Close(); |
| delta_performer_.reset(); |
| } |
| download_active_ = false; |
| // Terminates the transfer. The action is terminated, if necessary, when the |
| // TransferTerminated callback is received. |
| http_fetcher_->TerminateTransfer(); |
| } |
| |
| void DownloadAction::SeekToOffset(off_t offset) { |
| bytes_received_ = offset; |
| } |
| |
| bool DownloadAction::ReceivedBytes(HttpFetcher* fetcher, |
| const void* bytes, |
| size_t length) { |
| bytes_received_ += length; |
| uint64_t bytes_downloaded_total = |
| bytes_received_previous_payloads_ + bytes_received_; |
| if (delegate_ && download_active_) { |
| delegate_->BytesReceived(length, bytes_downloaded_total, bytes_total_); |
| } |
| if (delta_performer_ && !delta_performer_->Write(bytes, length, &code_)) { |
| if (code_ != ErrorCode::kSuccess) { |
| LOG(ERROR) << "Error " << utils::ErrorCodeToString(code_) << " (" << code_ |
| << ") in DeltaPerformer's Write method when " |
| << "processing the received payload -- Terminating processing"; |
| } |
| // Don't tell the action processor that the action is complete until we get |
| // the TransferTerminated callback. Otherwise, this and the HTTP fetcher |
| // objects may get destroyed before all callbacks are complete. |
| TerminateProcessing(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void DownloadAction::TransferComplete(HttpFetcher* fetcher, bool successful) { |
| if (delta_performer_) { |
| LOG_IF(WARNING, delta_performer_->Close() != 0) |
| << "Error closing the writer."; |
| } |
| download_active_ = false; |
| ErrorCode code = |
| successful ? ErrorCode::kSuccess : ErrorCode::kDownloadTransferError; |
| if (code == ErrorCode::kSuccess) { |
| if (delta_performer_ && !payload_->already_applied) |
| code = delta_performer_->VerifyPayload(payload_->hash, payload_->size); |
| if (code == ErrorCode::kSuccess) { |
| CHECK_EQ(install_plan_.payloads.size(), 1UL); |
| // All payloads have been applied and verified. |
| if (delegate_) |
| delegate_->DownloadComplete(); |
| |
| // Log UpdateEngine.DownloadAction.* histograms to help diagnose |
| // long-blocking operations. |
| std::string histogram_output; |
| base::StatisticsRecorder::WriteGraph("UpdateEngine.DownloadAction.", |
| &histogram_output); |
| LOG(INFO) << histogram_output; |
| } else { |
| LOG(ERROR) << "Download of " << install_plan_.download_url |
| << " failed due to payload verification error."; |
| } |
| } |
| |
| // Write the path to the output pipe if we're successful. |
| if (code == ErrorCode::kSuccess && HasOutputPipe()) |
| SetOutputObject(install_plan_); |
| processor_->ActionComplete(this, code); |
| } |
| |
| void DownloadAction::TransferTerminated(HttpFetcher* fetcher) { |
| if (code_ != ErrorCode::kSuccess) { |
| processor_->ActionComplete(this, code_); |
| } else if (payload_->already_applied) { |
| LOG(INFO) << "TransferTerminated with ErrorCode::kSuccess when the current " |
| "payload has already applied, treating as TransferComplete."; |
| TransferComplete(fetcher, true); |
| } |
| } |
| |
| } // namespace chromeos_update_engine |