1//
2// Copyright (C) 2012 The Android Open Source Project
3//
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at
7//
8//      http://www.apache.org/licenses/LICENSE-2.0
9//
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15//
16
17#ifndef UPDATE_ENGINE_PAYLOAD_GENERATOR_DELTA_DIFF_GENERATOR_H_
18#define UPDATE_ENGINE_PAYLOAD_GENERATOR_DELTA_DIFF_GENERATOR_H_
19
20#include <string>
21
22#include "update_engine/payload_generator/payload_generation_config.h"
23
24namespace chromeos_update_engine {
25
26extern const size_t kBlockSize;
27extern const size_t kRootFSPartitionSize;
28
29// The |config| describes the payload generation request, describing both
30// old and new images for delta payloads and only the new image for full
31// payloads.
32// For delta payloads, the images should be already mounted read-only at
33// the respective rootfs_mountpt.
34// |private_key_path| points to a private key used to sign the update.
35// Pass empty string to not sign the update.
36// |output_path| is the filename where the delta update should be written.
37// Returns true on success. Also writes the size of the metadata into
38// |metadata_size|.
39bool GenerateUpdatePayloadFile(const PayloadGenerationConfig& config,
40                               const std::string& output_path,
41                               const std::string& private_key_path,
42                               uint64_t* metadata_size);
43
44
45};  // namespace chromeos_update_engine
46
47#endif  // UPDATE_ENGINE_PAYLOAD_GENERATOR_DELTA_DIFF_GENERATOR_H_
48