create libmodprobe, integrate into first_stage_init
Modprobe functionality is required both within first stage init and also
as a standalone binary. Create a library for this using and extending
the logic in modalias_handler.cpp.
First stage init will attempt to load modules from /lib/modules.
Bug: 129780532
Change-Id: Ie3582358fd839c2f64e1b386b30ed551a86aef5d
diff --git a/libmodprobe/libmodprobe_ext_test.cpp b/libmodprobe/libmodprobe_ext_test.cpp
new file mode 100644
index 0000000..0f073cb
--- /dev/null
+++ b/libmodprobe/libmodprobe_ext_test.cpp
@@ -0,0 +1,61 @@
+/*
+ * 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 <sys/stat.h>
+#include <sys/syscall.h>
+
+#include <string>
+#include <vector>
+
+#include <android-base/logging.h>
+#include <android-base/strings.h>
+#include <android-base/unique_fd.h>
+#include <gtest/gtest.h>
+
+#include <modprobe/modprobe.h>
+
+#include "libmodprobe_test.h"
+
+bool Modprobe::Insmod(const std::string& path_name) {
+ auto deps = GetDependencies(MakeCanonical(path_name));
+ if (deps.empty()) {
+ return false;
+ }
+ if (std::find(test_modules.begin(), test_modules.end(), deps.front()) == test_modules.end()) {
+ return false;
+ }
+ for (auto it = modules_loaded.begin(); it != modules_loaded.end(); ++it) {
+ if (android::base::StartsWith(*it, path_name)) {
+ return true;
+ }
+ }
+ std::string options;
+ auto options_iter = module_options_.find(MakeCanonical(path_name));
+ if (options_iter != module_options_.end()) {
+ options = " " + options_iter->second;
+ }
+ modules_loaded.emplace_back(path_name + options);
+ return true;
+}
+
+bool Modprobe::ModuleExists(const std::string& module_name) {
+ auto deps = GetDependencies(module_name);
+ if (deps.empty()) {
+ // missing deps can happen in the case of an alias
+ return false;
+ }
+ return std::find(test_modules.begin(), test_modules.end(), deps.front()) != test_modules.end();
+}