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//
// Copyright (C) 2015 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/payload_generator/payload_generation_config.h"
#include <base/logging.h>
#include "update_engine/common/utils.h"
#include "update_engine/payload_consumer/delta_performer.h"
#include "update_engine/payload_generator/delta_diff_generator.h"
#include "update_engine/payload_generator/delta_diff_utils.h"
#include "update_engine/payload_generator/ext2_filesystem.h"
#include "update_engine/payload_generator/mapfile_filesystem.h"
#include "update_engine/payload_generator/raw_filesystem.h"
namespace chromeos_update_engine {
bool PostInstallConfig::IsEmpty() const {
return !run && path.empty() && filesystem_type.empty() && !optional;
}
bool PartitionConfig::ValidateExists() const {
TEST_AND_RETURN_FALSE(!path.empty());
TEST_AND_RETURN_FALSE(utils::FileExists(path.c_str()));
TEST_AND_RETURN_FALSE(size > 0);
// The requested size is within the limits of the file.
TEST_AND_RETURN_FALSE(static_cast<off_t>(size) <=
utils::FileSize(path.c_str()));
return true;
}
bool PartitionConfig::OpenFilesystem() {
if (path.empty())
return true;
fs_interface.reset();
if (diff_utils::IsExtFilesystem(path)) {
fs_interface = Ext2Filesystem::CreateFromFile(path);
// TODO(deymo): The delta generator algorithm doesn't support a block size
// different than 4 KiB. Remove this check once that's fixed. b/26972455
if (fs_interface) {
TEST_AND_RETURN_FALSE(fs_interface->GetBlockSize() == kBlockSize);
return true;
}
}
if (!mapfile_path.empty()) {
fs_interface = MapfileFilesystem::CreateFromFile(path, mapfile_path);
if (fs_interface) {
TEST_AND_RETURN_FALSE(fs_interface->GetBlockSize() == kBlockSize);
return true;
}
}
// Fall back to a RAW filesystem.
TEST_AND_RETURN_FALSE(size % kBlockSize == 0);
fs_interface = RawFilesystem::Create(
"<" + name + "-partition>", kBlockSize, size / kBlockSize);
return true;
}
bool ImageConfig::ValidateIsEmpty() const {
TEST_AND_RETURN_FALSE(ImageInfoIsEmpty());
return partitions.empty();
}
bool ImageConfig::LoadImageSize() {
for (PartitionConfig& part : partitions) {
if (part.path.empty())
continue;
part.size = utils::FileSize(part.path);
}
return true;
}
bool ImageConfig::LoadPostInstallConfig(const brillo::KeyValueStore& store) {
bool found_postinstall = false;
for (PartitionConfig& part : partitions) {
bool run_postinstall;
if (!store.GetBoolean("RUN_POSTINSTALL_" + part.name, &run_postinstall) ||
!run_postinstall)
continue;
found_postinstall = true;
part.postinstall.run = true;
store.GetString("POSTINSTALL_PATH_" + part.name, &part.postinstall.path);
store.GetString("FILESYSTEM_TYPE_" + part.name,
&part.postinstall.filesystem_type);
store.GetBoolean("POSTINSTALL_OPTIONAL_" + part.name,
&part.postinstall.optional);
}
if (!found_postinstall) {
LOG(ERROR) << "No valid postinstall config found.";
return false;
}
return true;
}
bool ImageConfig::ImageInfoIsEmpty() const {
return image_info.board().empty()
&& image_info.key().empty()
&& image_info.channel().empty()
&& image_info.version().empty()
&& image_info.build_channel().empty()
&& image_info.build_version().empty();
}
PayloadVersion::PayloadVersion(uint64_t major_version, uint32_t minor_version) {
major = major_version;
minor = minor_version;
}
bool PayloadVersion::Validate() const {
TEST_AND_RETURN_FALSE(major == kChromeOSMajorPayloadVersion ||
major == kBrilloMajorPayloadVersion);
TEST_AND_RETURN_FALSE(minor == kFullPayloadMinorVersion ||
minor == kInPlaceMinorPayloadVersion ||
minor == kSourceMinorPayloadVersion ||
minor == kOpSrcHashMinorPayloadVersion ||
minor == kPuffdiffMinorPayloadVersion);
return true;
}
bool PayloadVersion::OperationAllowed(InstallOperation_Type operation) const {
switch (operation) {
// Full operations:
case InstallOperation::REPLACE:
case InstallOperation::REPLACE_BZ:
// These operations were included in the original payload format.
return true;
case InstallOperation::REPLACE_XZ:
// These operations are included in the major version used in Brillo, but
// can also be used with minor version 3 or newer.
return major == kBrilloMajorPayloadVersion ||
minor >= kOpSrcHashMinorPayloadVersion;
case InstallOperation::ZERO:
case InstallOperation::DISCARD:
// The implementation of these operations had a bug in earlier versions
// that prevents them from being used in any payload. We will enable
// them for delta payloads for now.
return minor >= kPuffdiffMinorPayloadVersion;
// Delta operations:
case InstallOperation::MOVE:
case InstallOperation::BSDIFF:
// MOVE and BSDIFF were replaced by SOURCE_COPY and SOURCE_BSDIFF and
// should not be used in newer delta versions, since the idempotent checks
// were removed.
return minor == kInPlaceMinorPayloadVersion;
case InstallOperation::SOURCE_COPY:
case InstallOperation::SOURCE_BSDIFF:
return minor >= kSourceMinorPayloadVersion;
case InstallOperation::BROTLI_BSDIFF:
case InstallOperation::PUFFDIFF:
return minor >= kPuffdiffMinorPayloadVersion;
}
return false;
}
bool PayloadVersion::IsDelta() const {
return minor != kFullPayloadMinorVersion;
}
bool PayloadVersion::InplaceUpdate() const {
return minor == kInPlaceMinorPayloadVersion;
}
bool PayloadGenerationConfig::Validate() const {
TEST_AND_RETURN_FALSE(version.Validate());
TEST_AND_RETURN_FALSE(version.IsDelta() == is_delta);
if (is_delta) {
for (const PartitionConfig& part : source.partitions) {
if (!part.path.empty()) {
TEST_AND_RETURN_FALSE(part.ValidateExists());
TEST_AND_RETURN_FALSE(part.size % block_size == 0);
}
// Source partition should not have postinstall.
TEST_AND_RETURN_FALSE(part.postinstall.IsEmpty());
}
// If new_image_info is present, old_image_info must be present.
TEST_AND_RETURN_FALSE(source.ImageInfoIsEmpty() ==
target.ImageInfoIsEmpty());
} else {
// All the "source" image fields must be empty for full payloads.
TEST_AND_RETURN_FALSE(source.ValidateIsEmpty());
}
// In all cases, the target image must exists.
for (const PartitionConfig& part : target.partitions) {
TEST_AND_RETURN_FALSE(part.ValidateExists());
TEST_AND_RETURN_FALSE(part.size % block_size == 0);
if (version.minor == kInPlaceMinorPayloadVersion &&
part.name == kLegacyPartitionNameRoot)
TEST_AND_RETURN_FALSE(rootfs_partition_size >= part.size);
if (version.major == kChromeOSMajorPayloadVersion)
TEST_AND_RETURN_FALSE(part.postinstall.IsEmpty());
}
TEST_AND_RETURN_FALSE(hard_chunk_size == -1 ||
hard_chunk_size % block_size == 0);
TEST_AND_RETURN_FALSE(soft_chunk_size % block_size == 0);
TEST_AND_RETURN_FALSE(rootfs_partition_size % block_size == 0);
return true;
}
} // namespace chromeos_update_engine
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