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110 lines
3.8 KiB
110 lines
3.8 KiB
/* |
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* Copyright (C) 2019 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include "KernelInfo.h" |
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#include "parse_string.h" |
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namespace android { |
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namespace vintf { |
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const KernelVersion& KernelInfo::version() const { |
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return mVersion; |
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} |
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const std::map<std::string, std::string>& KernelInfo::configs() const { |
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return mConfigs; |
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} |
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bool KernelInfo::matchKernelConfigs(const std::vector<KernelConfig>& matrixConfigs, |
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std::string* error) const { |
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for (const KernelConfig& matrixConfig : matrixConfigs) { |
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const std::string& key = matrixConfig.first; |
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auto it = this->mConfigs.find(key); |
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if (it == this->mConfigs.end()) { |
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// special case: <value type="tristate">n</value> matches if the config doesn't exist. |
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if (matrixConfig.second == KernelConfigTypedValue::gMissingConfig) { |
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continue; |
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} |
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if (error != nullptr) { |
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*error = "Missing config " + key; |
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} |
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return false; |
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} |
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const std::string& kernelValue = it->second; |
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if (!matrixConfig.second.matchValue(kernelValue)) { |
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if (error != nullptr) { |
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*error = "For config " + key + ", value = " + kernelValue + " but required " + |
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to_string(matrixConfig.second); |
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} |
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return false; |
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} |
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} |
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return true; |
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} |
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bool KernelInfo::matchKernelVersion(const KernelVersion& minLts) const { |
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return minLts.version == mVersion.version && minLts.majorRev == mVersion.majorRev && |
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minLts.minorRev <= mVersion.minorRev; |
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} |
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bool KernelInfo::matchKernelRequirements(const std::vector<MatrixKernel>& kernels, |
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std::string* error) const { |
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bool foundMatchedKernelVersion = false; |
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bool foundMatchedConditions = false; |
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for (const MatrixKernel& matrixKernel : kernels) { |
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if (!matchKernelVersion(matrixKernel.minLts())) { |
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continue; |
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} |
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foundMatchedKernelVersion = true; |
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// ignore this fragment if not all conditions are met. |
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if (!matchKernelConfigs(matrixKernel.conditions(), error)) { |
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continue; |
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} |
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foundMatchedConditions = true; |
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if (!matchKernelConfigs(matrixKernel.configs(), error)) { |
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return false; |
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} |
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} |
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if (!foundMatchedKernelVersion) { |
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if (error != nullptr) { |
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std::stringstream ss; |
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ss << "Framework is incompatible with kernel version " << version() |
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<< ", compatible kernel versions are"; |
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for (const MatrixKernel& matrixKernel : kernels) ss << " " << matrixKernel.minLts(); |
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*error = ss.str(); |
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} |
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return false; |
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} |
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if (!foundMatchedConditions) { |
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// This should not happen because first <conditions> for each <kernel> must be |
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// empty. Reject here for inconsistency. |
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if (error != nullptr) { |
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error->insert(0, "Framework match kernel version with unmet conditions:"); |
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} |
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return false; |
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} |
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if (error != nullptr) { |
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error->clear(); |
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} |
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return true; |
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} |
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bool KernelInfo::operator==(const KernelInfo& other) const { |
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return mVersion == other.mVersion && mConfigs == other.mConfigs; |
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} |
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} // namespace vintf |
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} // namespace android
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