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      1 //
      2 // Copyright (C) 2014 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_CONSUMER_PAYLOAD_CONSTANTS_H_
     18 #define UPDATE_ENGINE_PAYLOAD_CONSUMER_PAYLOAD_CONSTANTS_H_
     19 
     20 #include <stdint.h>
     21 
     22 #include <limits>
     23 
     24 #include "update_engine/update_metadata.pb.h"
     25 
     26 namespace chromeos_update_engine {
     27 
     28 // The major version used by Chrome OS.
     29 extern const uint64_t kChromeOSMajorPayloadVersion;
     30 
     31 // The major version used by Brillo.
     32 extern const uint64_t kBrilloMajorPayloadVersion;
     33 
     34 // The minor version used for all full payloads.
     35 extern const uint32_t kFullPayloadMinorVersion;
     36 
     37 // The minor version used by the in-place delta generator algorithm.
     38 extern const uint32_t kInPlaceMinorPayloadVersion;
     39 
     40 // The minor version used by the A to B delta generator algorithm.
     41 extern const uint32_t kSourceMinorPayloadVersion;
     42 
     43 // The minor version that allows per-operation source hash.
     44 extern const uint32_t kOpSrcHashMinorPayloadVersion;
     45 
     46 // The minor version that allows IMGDIFF operation.
     47 extern const uint32_t kImgdiffMinorPayloadVersion;
     48 
     49 
     50 // The kernel and rootfs partition names used by the BootControlInterface when
     51 // handling update payloads with a major version 1. The names of the updated
     52 // partitions are include in the payload itself for major version 2.
     53 extern const char kLegacyPartitionNameKernel[];
     54 extern const char kLegacyPartitionNameRoot[];
     55 
     56 extern const char kBspatchPath[];
     57 extern const char kDeltaMagic[4];
     58 
     59 // The list of compatible SHA256 hashes of zlib source code.
     60 // This is used to check if the source image have a compatible zlib (produce
     61 // same compressed result given the same input).
     62 // When a new fingerprint is found, please examine the changes in zlib source
     63 // carefully and determine if it's still compatible with previous version, if
     64 // yes then add the new fingerprint to this array, otherwise remove all previous
     65 // fingerprints in the array first, and only include the new fingerprint.
     66 extern const char kCompatibleZlibFingerprint[2][65];
     67 
     68 // A block number denoting a hole on a sparse file. Used on Extents to refer to
     69 // section of blocks not present on disk on a sparse file.
     70 const uint64_t kSparseHole = std::numeric_limits<uint64_t>::max();
     71 
     72 // Return the name of the operation type.
     73 const char* InstallOperationTypeName(InstallOperation_Type op_type);
     74 
     75 }  // namespace chromeos_update_engine
     76 
     77 #endif  // UPDATE_ENGINE_PAYLOAD_CONSUMER_PAYLOAD_CONSTANTS_H_
     78