/*
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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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