| /* |
| * Copyright (C) 2019 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 "KernelInfo.h" |
| |
| #include "parse_string.h" |
| |
| namespace android { |
| namespace vintf { |
| |
| const KernelVersion& KernelInfo::version() const { |
| return mVersion; |
| } |
| |
| const std::map<std::string, std::string>& KernelInfo::configs() const { |
| return mConfigs; |
| } |
| |
| bool KernelInfo::matchKernelConfigs(const std::vector<KernelConfig>& matrixConfigs, |
| std::string* error) const { |
| for (const KernelConfig& matrixConfig : matrixConfigs) { |
| const std::string& key = matrixConfig.first; |
| auto it = this->mConfigs.find(key); |
| if (it == this->mConfigs.end()) { |
| // special case: <value type="tristate">n</value> matches if the config doesn't exist. |
| if (matrixConfig.second == KernelConfigTypedValue::gMissingConfig) { |
| continue; |
| } |
| if (error != nullptr) { |
| *error = "Missing config " + key; |
| } |
| return false; |
| } |
| const std::string& kernelValue = it->second; |
| if (!matrixConfig.second.matchValue(kernelValue)) { |
| if (error != nullptr) { |
| *error = "For config " + key + ", value = " + kernelValue + " but required " + |
| to_string(matrixConfig.second); |
| } |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool KernelInfo::matchKernelVersion(const KernelVersion& minLts) const { |
| return minLts.version == mVersion.version && minLts.majorRev == mVersion.majorRev && |
| minLts.minorRev <= mVersion.minorRev; |
| } |
| |
| bool KernelInfo::matchKernelRequirements(const std::vector<MatrixKernel>& kernels, |
| std::string* error) const { |
| bool foundMatchedKernelVersion = false; |
| bool foundMatchedConditions = false; |
| for (const MatrixKernel& matrixKernel : kernels) { |
| if (!matchKernelVersion(matrixKernel.minLts())) { |
| continue; |
| } |
| foundMatchedKernelVersion = true; |
| // ignore this fragment if not all conditions are met. |
| if (!matchKernelConfigs(matrixKernel.conditions(), error)) { |
| continue; |
| } |
| foundMatchedConditions = true; |
| if (!matchKernelConfigs(matrixKernel.configs(), error)) { |
| return false; |
| } |
| } |
| if (!foundMatchedKernelVersion) { |
| if (error != nullptr) { |
| std::stringstream ss; |
| ss << "Framework is incompatible with kernel version " << version() |
| << ", compatible kernel versions are"; |
| for (const MatrixKernel& matrixKernel : kernels) ss << " " << matrixKernel.minLts(); |
| *error = ss.str(); |
| } |
| return false; |
| } |
| if (!foundMatchedConditions) { |
| // This should not happen because first <conditions> for each <kernel> must be |
| // empty. Reject here for inconsistency. |
| if (error != nullptr) { |
| error->insert(0, "Framework match kernel version with unmet conditions:"); |
| } |
| return false; |
| } |
| if (error != nullptr) { |
| error->clear(); |
| } |
| return true; |
| } |
| |
| bool KernelInfo::operator==(const KernelInfo& other) const { |
| return mVersion == other.mVersion && mConfigs == other.mConfigs; |
| } |
| |
| } // namespace vintf |
| } // namespace android |