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/*
* Copyright (C) 2018 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.
*/
#pragma once
#include <mutex>
#include <set>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <android-base/thread_annotations.h>
class Modprobe {
public:
Modprobe(const std::vector<std::string>&, const std::string load_file = "modules.load",
bool use_blocklist = true);
bool LoadModulesParallel(int num_threads);
bool LoadListedModules(bool strict = true);
bool LoadWithAliases(const std::string& module_name, bool strict,
const std::string& parameters = "");
bool Remove(const std::string& module_name);
std::vector<std::string> ListModules(const std::string& pattern);
bool GetAllDependencies(const std::string& module, std::vector<std::string>* pre_dependencies,
std::vector<std::string>* dependencies,
std::vector<std::string>* post_dependencies);
void ResetModuleCount() { module_count_ = 0; }
int GetModuleCount() { return module_count_; }
private:
std::string MakeCanonical(const std::string& module_path);
bool InsmodWithDeps(const std::string& module_name, const std::string& parameters);
bool Insmod(const std::string& path_name, const std::string& parameters);
bool Rmmod(const std::string& module_name);
std::vector<std::string> GetDependencies(const std::string& module);
bool ModuleExists(const std::string& module_name);
void AddOption(const std::string& module_name, const std::string& option_name,
const std::string& value);
std::string GetKernelCmdline();
bool IsBlocklisted(const std::string& module_name);
bool ParseDepCallback(const std::string& base_path, const std::vector<std::string>& args);
bool ParseAliasCallback(const std::vector<std::string>& args);
bool ParseSoftdepCallback(const std::vector<std::string>& args);
bool ParseLoadCallback(const std::vector<std::string>& args);
bool ParseOptionsCallback(const std::vector<std::string>& args);
bool ParseBlocklistCallback(const std::vector<std::string>& args);
void ParseKernelCmdlineOptions();
void ParseCfg(const std::string& cfg, std::function<bool(const std::vector<std::string>&)> f);
std::vector<std::pair<std::string, std::string>> module_aliases_;
std::unordered_map<std::string, std::vector<std::string>> module_deps_;
std::vector<std::pair<std::string, std::string>> module_pre_softdep_;
std::vector<std::pair<std::string, std::string>> module_post_softdep_;
std::vector<std::string> module_load_;
std::unordered_map<std::string, std::string> module_options_;
std::set<std::string> module_blocklist_;
std::mutex module_loaded_lock_;
std::unordered_set<std::string> module_loaded_;
std::unordered_set<std::string> module_loaded_paths_;
int module_count_ = 0;
bool blocklist_enabled = false;
};
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