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/init/Android.bp b/init/Android.bp
index fa0a35c..9c1ed15 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -63,6 +63,7 @@
"libavb",
"libc++fs",
"libcgrouprc_format",
+ "libmodprobe",
"libprotobuf-cpp-lite",
"libpropertyinfoserializer",
"libpropertyinfoparser",
diff --git a/init/Android.mk b/init/Android.mk
index 0a3e8c7..b24f757 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -110,6 +110,7 @@
libdexfile_support \
libunwindstack \
libbacktrace \
+ libmodprobe \
LOCAL_SANITIZE := signed-integer-overflow
# First stage init is weird: it may start without stdout/stderr, and no /proc.
diff --git a/init/first_stage_init.cpp b/init/first_stage_init.cpp
index 5d64f41..17387e2 100644
--- a/init/first_stage_init.cpp
+++ b/init/first_stage_init.cpp
@@ -33,6 +33,7 @@
#include <android-base/chrono_utils.h>
#include <android-base/file.h>
#include <android-base/logging.h>
+#include <modprobe/modprobe.h>
#include <private/android_filesystem_config.h>
#include "debug_ramdisk.h"
@@ -192,6 +193,11 @@
old_root_dir.reset();
}
+ Modprobe m({"/lib/modules"});
+ if (!m.LoadListedModules()) {
+ LOG(FATAL) << "Failed to load kernel modules";
+ }
+
if (ForceNormalBoot()) {
mkdir("/first_stage_ramdisk", 0755);
// SwitchRoot() must be called with a mount point as the target, so we bind mount the
diff --git a/init/modalias_handler.cpp b/init/modalias_handler.cpp
index a511156..07b05d8 100644
--- a/init/modalias_handler.cpp
+++ b/init/modalias_handler.cpp
@@ -16,147 +16,20 @@
#include "modalias_handler.h"
-#include <fnmatch.h>
-#include <sys/syscall.h>
-
-#include <algorithm>
-#include <functional>
#include <string>
#include <vector>
-#include <android-base/chrono_utils.h>
-#include <android-base/logging.h>
-#include <android-base/unique_fd.h>
-
-#include "parser.h"
+#include <modprobe/modprobe.h>
namespace android {
namespace init {
-Result<void> ModaliasHandler::ParseDepCallback(std::vector<std::string>&& args) {
- std::vector<std::string> deps;
-
- // Set first item as our modules path
- std::string::size_type pos = args[0].find(':');
- if (pos != std::string::npos) {
- deps.emplace_back(args[0].substr(0, pos));
- } else {
- return Error() << "dependency lines must start with name followed by ':'";
- }
-
- // Remaining items are dependencies of our module
- for (auto arg = args.begin() + 1; arg != args.end(); ++arg) {
- deps.push_back(*arg);
- }
-
- // Key is striped module name to match names in alias file
- std::size_t start = args[0].find_last_of('/');
- std::size_t end = args[0].find(".ko:");
- if ((end - start) <= 1) return Error() << "malformed dependency line";
- auto mod_name = args[0].substr(start + 1, (end - start) - 1);
- // module names can have '-', but their file names will have '_'
- std::replace(mod_name.begin(), mod_name.end(), '-', '_');
- this->module_deps_[mod_name] = deps;
-
- return {};
-}
-
-Result<void> ModaliasHandler::ParseAliasCallback(std::vector<std::string>&& args) {
- auto it = args.begin();
- const std::string& type = *it++;
-
- if (type != "alias") {
- return Error() << "we only handle alias lines, got: " << type;
- }
-
- if (args.size() != 3) {
- return Error() << "alias lines must have 3 entries";
- }
-
- std::string& alias = *it++;
- std::string& module_name = *it++;
- this->module_aliases_.emplace_back(alias, module_name);
-
- return {};
-}
-
-ModaliasHandler::ModaliasHandler() {
- using namespace std::placeholders;
-
- static const std::string base_paths[] = {
- "/vendor/lib/modules/",
- "/lib/modules/",
- "/odm/lib/modules/",
- };
-
- Parser alias_parser;
- auto alias_callback = std::bind(&ModaliasHandler::ParseAliasCallback, this, _1);
- alias_parser.AddSingleLineParser("alias", alias_callback);
- for (const auto& base_path : base_paths) alias_parser.ParseConfig(base_path + "modules.alias");
-
- Parser dep_parser;
- auto dep_callback = std::bind(&ModaliasHandler::ParseDepCallback, this, _1);
- dep_parser.AddSingleLineParser("", dep_callback);
- for (const auto& base_path : base_paths) dep_parser.ParseConfig(base_path + "modules.dep");
-}
-
-Result<void> ModaliasHandler::Insmod(const std::string& path_name, const std::string& args) {
- base::unique_fd fd(
- TEMP_FAILURE_RETRY(open(path_name.c_str(), O_RDONLY | O_NOFOLLOW | O_CLOEXEC)));
- if (fd == -1) return ErrnoError() << "Could not open module '" << path_name << "'";
-
- int ret = syscall(__NR_finit_module, fd.get(), args.c_str(), 0);
- if (ret != 0) {
- if (errno == EEXIST) {
- // Module already loaded
- return {};
- }
- return ErrnoError() << "Failed to insmod '" << path_name << "' with args '" << args << "'";
- }
-
- LOG(INFO) << "Loaded kernel module " << path_name;
- return {};
-}
-
-Result<void> ModaliasHandler::InsmodWithDeps(const std::string& module_name,
- const std::string& args) {
- if (module_name.empty()) {
- return Error() << "Need valid module name";
- }
-
- auto it = module_deps_.find(module_name);
- if (it == module_deps_.end()) {
- return Error() << "Module '" << module_name << "' not in dependency file";
- }
- auto& dependencies = it->second;
-
- // load module dependencies in reverse order
- for (auto dep = dependencies.rbegin(); dep != dependencies.rend() - 1; ++dep) {
- if (auto result = Insmod(*dep, ""); !result) return result;
- }
-
- // load target module itself with args
- return Insmod(dependencies[0], args);
-}
+ModaliasHandler::ModaliasHandler(const std::vector<std::string>& base_paths)
+ : modprobe_(base_paths) {}
void ModaliasHandler::HandleUevent(const Uevent& uevent) {
if (uevent.modalias.empty()) return;
-
- for (const auto& [alias, module] : module_aliases_) {
- if (fnmatch(alias.c_str(), uevent.modalias.c_str(), 0) != 0) continue; // Keep looking
-
- LOG(DEBUG) << "Loading kernel module '" << module << "' for alias '" << uevent.modalias
- << "'";
-
- if (auto result = InsmodWithDeps(module, ""); !result) {
- LOG(ERROR) << "Cannot load module: " << result.error();
- // try another one since there may be another match
- continue;
- }
-
- // loading was successful
- return;
- }
+ modprobe_.LoadWithAliases(uevent.modalias, true);
}
} // namespace init
diff --git a/init/modalias_handler.h b/init/modalias_handler.h
index 7d0afde..ce89a05 100644
--- a/init/modalias_handler.h
+++ b/init/modalias_handler.h
@@ -17,10 +17,10 @@
#pragma once
#include <string>
-#include <unordered_map>
#include <vector>
-#include "result.h"
+#include <modprobe/modprobe.h>
+
#include "uevent.h"
#include "uevent_handler.h"
@@ -29,20 +29,13 @@
class ModaliasHandler : public UeventHandler {
public:
- ModaliasHandler();
+ ModaliasHandler(const std::vector<std::string>&);
virtual ~ModaliasHandler() = default;
void HandleUevent(const Uevent& uevent) override;
private:
- Result<void> InsmodWithDeps(const std::string& module_name, const std::string& args);
- Result<void> Insmod(const std::string& path_name, const std::string& args);
-
- Result<void> ParseDepCallback(std::vector<std::string>&& args);
- Result<void> ParseAliasCallback(std::vector<std::string>&& args);
-
- std::vector<std::pair<std::string, std::string>> module_aliases_;
- std::unordered_map<std::string, std::vector<std::string>> module_deps_;
+ Modprobe modprobe_;
};
} // namespace init
diff --git a/init/ueventd.cpp b/init/ueventd.cpp
index d700c46..f550bc2 100644
--- a/init/ueventd.cpp
+++ b/init/ueventd.cpp
@@ -251,7 +251,8 @@
std::move(ueventd_configuration.firmware_directories)));
if (ueventd_configuration.enable_modalias_handling) {
- uevent_handlers.emplace_back(std::make_unique<ModaliasHandler>());
+ std::vector<std::string> base_paths = {"/odm/lib/modules", "/vendor/lib/modules"};
+ uevent_handlers.emplace_back(std::make_unique<ModaliasHandler>(base_paths));
}
UeventListener uevent_listener(ueventd_configuration.uevent_socket_rcvbuf_size);
diff --git a/libmodprobe/Android.bp b/libmodprobe/Android.bp
new file mode 100644
index 0000000..a2824d1
--- /dev/null
+++ b/libmodprobe/Android.bp
@@ -0,0 +1,30 @@
+cc_library_static {
+ name: "libmodprobe",
+ cflags: [
+ "-Werror",
+ ],
+ recovery_available: true,
+ srcs: [
+ "libmodprobe.cpp",
+ "libmodprobe_ext.cpp",
+ ],
+ shared_libs: [
+ "libbase",
+ ],
+ export_include_dirs: ["include/"],
+}
+
+cc_test {
+ name: "libmodprobe_tests",
+ cflags: ["-Werror"],
+ shared_libs: [
+ "libbase",
+ ],
+ local_include_dirs: ["include/"],
+ srcs: [
+ "libmodprobe_test.cpp",
+ "libmodprobe.cpp",
+ "libmodprobe_ext_test.cpp",
+ ],
+ test_suites: ["device-tests"],
+}
diff --git a/libmodprobe/include/modprobe/modprobe.h b/libmodprobe/include/modprobe/modprobe.h
new file mode 100644
index 0000000..0ec766a
--- /dev/null
+++ b/libmodprobe/include/modprobe/modprobe.h
@@ -0,0 +1,50 @@
+/*
+ * 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 <string>
+#include <unordered_map>
+#include <vector>
+
+class Modprobe {
+ public:
+ Modprobe(const std::vector<std::string>&);
+
+ bool LoadListedModules();
+ bool LoadWithAliases(const std::string& module_name, bool strict);
+
+ private:
+ std::string MakeCanonical(const std::string& module_path);
+ bool InsmodWithDeps(const std::string& module_name);
+ bool Insmod(const std::string& path_name);
+ std::vector<std::string> GetDependencies(const std::string& module);
+ bool ModuleExists(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);
+ 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_;
+};
diff --git a/libmodprobe/libmodprobe.cpp b/libmodprobe/libmodprobe.cpp
new file mode 100644
index 0000000..01cf2e3
--- /dev/null
+++ b/libmodprobe/libmodprobe.cpp
@@ -0,0 +1,321 @@
+/*
+ * 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.
+ */
+
+#include <modprobe/modprobe.h>
+
+#include <fnmatch.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+
+#include <algorithm>
+#include <set>
+#include <string>
+#include <vector>
+
+#include <android-base/chrono_utils.h>
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/strings.h>
+#include <android-base/unique_fd.h>
+
+std::string Modprobe::MakeCanonical(const std::string& module_path) {
+ auto start = module_path.find_last_of('/');
+ if (start == std::string::npos) {
+ start = 0;
+ } else {
+ start += 1;
+ }
+ auto end = module_path.size();
+ if (android::base::EndsWith(module_path, ".ko")) {
+ end -= 3;
+ }
+ if ((end - start) <= 1) {
+ LOG(ERROR) << "malformed module name: " << module_path;
+ return "";
+ }
+ std::string module_name = module_path.substr(start, end - start);
+ // module names can have '-', but their file names will have '_'
+ std::replace(module_name.begin(), module_name.end(), '-', '_');
+ return module_name;
+}
+
+bool Modprobe::ParseDepCallback(const std::string& base_path,
+ const std::vector<std::string>& args) {
+ std::vector<std::string> deps;
+ std::string prefix = "";
+
+ // Set first item as our modules path
+ std::string::size_type pos = args[0].find(':');
+ if (args[0][0] != '/') {
+ prefix = base_path + "/";
+ }
+ if (pos != std::string::npos) {
+ deps.emplace_back(prefix + args[0].substr(0, pos));
+ } else {
+ LOG(ERROR) << "dependency lines must start with name followed by ':'";
+ }
+
+ // Remaining items are dependencies of our module
+ for (auto arg = args.begin() + 1; arg != args.end(); ++arg) {
+ if ((*arg)[0] != '/') {
+ prefix = base_path + "/";
+ } else {
+ prefix = "";
+ }
+ deps.push_back(prefix + *arg);
+ }
+
+ std::string canonical_name = MakeCanonical(args[0].substr(0, pos));
+ if (canonical_name.empty()) {
+ return false;
+ }
+ this->module_deps_[canonical_name] = deps;
+
+ return true;
+}
+
+bool Modprobe::ParseAliasCallback(const std::vector<std::string>& args) {
+ auto it = args.begin();
+ const std::string& type = *it++;
+
+ if (type != "alias") {
+ LOG(ERROR) << "non-alias line encountered in modules.alias, found " << type;
+ return false;
+ }
+
+ if (args.size() != 3) {
+ LOG(ERROR) << "alias lines in modules.alias must have 3 entries, not " << args.size();
+ return false;
+ }
+
+ const std::string& alias = *it++;
+ const std::string& module_name = *it++;
+ this->module_aliases_.emplace_back(alias, module_name);
+
+ return true;
+}
+
+bool Modprobe::ParseSoftdepCallback(const std::vector<std::string>& args) {
+ auto it = args.begin();
+ const std::string& type = *it++;
+ std::string state = "";
+
+ if (type != "softdep") {
+ LOG(ERROR) << "non-softdep line encountered in modules.softdep, found " << type;
+ return false;
+ }
+
+ if (args.size() < 4) {
+ LOG(ERROR) << "softdep lines in modules.softdep must have at least 4 entries";
+ return false;
+ }
+
+ const std::string& module = *it++;
+ while (it != args.end()) {
+ const std::string& token = *it++;
+ if (token == "pre:" || token == "post:") {
+ state = token;
+ continue;
+ }
+ if (state == "") {
+ LOG(ERROR) << "malformed modules.softdep at token " << token;
+ return false;
+ }
+ if (state == "pre:") {
+ this->module_pre_softdep_.emplace_back(module, token);
+ } else {
+ this->module_post_softdep_.emplace_back(module, token);
+ }
+ }
+
+ return true;
+}
+
+bool Modprobe::ParseLoadCallback(const std::vector<std::string>& args) {
+ auto it = args.begin();
+ const std::string& module = *it++;
+
+ const std::string& canonical_name = MakeCanonical(module);
+ if (canonical_name.empty()) {
+ return false;
+ }
+ this->module_load_.emplace_back(canonical_name);
+
+ return true;
+}
+
+bool Modprobe::ParseOptionsCallback(const std::vector<std::string>& args) {
+ auto it = args.begin();
+ const std::string& type = *it++;
+
+ if (type != "options") {
+ LOG(ERROR) << "non-options line encountered in modules.options";
+ return false;
+ }
+
+ if (args.size() < 2) {
+ LOG(ERROR) << "lines in modules.options must have at least 2 entries, not " << args.size();
+ return false;
+ }
+
+ const std::string& module = *it++;
+ std::string options = "";
+
+ const std::string& canonical_name = MakeCanonical(module);
+ if (canonical_name.empty()) {
+ return false;
+ }
+
+ while (it != args.end()) {
+ options += *it++;
+ if (it != args.end()) {
+ options += " ";
+ }
+ }
+
+ auto [unused, inserted] = this->module_options_.emplace(canonical_name, options);
+ if (!inserted) {
+ LOG(ERROR) << "multiple options lines present for module " << module;
+ return false;
+ }
+ return true;
+}
+
+void Modprobe::ParseCfg(const std::string& cfg,
+ std::function<bool(const std::vector<std::string>&)> f) {
+ std::string cfg_contents;
+ if (!android::base::ReadFileToString(cfg, &cfg_contents, false)) {
+ return;
+ }
+
+ std::vector<std::string> lines = android::base::Split(cfg_contents, "\n");
+ for (const std::string line : lines) {
+ if (line.empty() || line[0] == '#') {
+ continue;
+ }
+ const std::vector<std::string> args = android::base::Split(line, " ");
+ if (args.empty()) continue;
+ f(args);
+ }
+ return;
+}
+
+Modprobe::Modprobe(const std::vector<std::string>& base_paths) {
+ using namespace std::placeholders;
+
+ for (const auto& base_path : base_paths) {
+ auto alias_callback = std::bind(&Modprobe::ParseAliasCallback, this, _1);
+ ParseCfg(base_path + "/modules.alias", alias_callback);
+
+ auto dep_callback = std::bind(&Modprobe::ParseDepCallback, this, base_path, _1);
+ ParseCfg(base_path + "/modules.dep", dep_callback);
+
+ auto softdep_callback = std::bind(&Modprobe::ParseSoftdepCallback, this, _1);
+ ParseCfg(base_path + "/modules.softdep", softdep_callback);
+
+ auto load_callback = std::bind(&Modprobe::ParseLoadCallback, this, _1);
+ ParseCfg(base_path + "/modules.load", load_callback);
+
+ auto options_callback = std::bind(&Modprobe::ParseOptionsCallback, this, _1);
+ ParseCfg(base_path + "/modules.options", options_callback);
+ }
+}
+
+std::vector<std::string> Modprobe::GetDependencies(const std::string& module) {
+ auto it = module_deps_.find(module);
+ if (it == module_deps_.end()) {
+ return {};
+ }
+ return it->second;
+}
+
+bool Modprobe::InsmodWithDeps(const std::string& module_name) {
+ if (module_name.empty()) {
+ LOG(ERROR) << "Need valid module name, given: " << module_name;
+ return false;
+ }
+
+ auto dependencies = GetDependencies(module_name);
+ if (dependencies.empty()) {
+ LOG(ERROR) << "Module " << module_name << " not in dependency file";
+ return false;
+ }
+
+ // load module dependencies in reverse order
+ for (auto dep = dependencies.rbegin(); dep != dependencies.rend() - 1; ++dep) {
+ const std::string& canonical_name = MakeCanonical(*dep);
+ if (canonical_name.empty()) {
+ return false;
+ }
+ if (!LoadWithAliases(canonical_name, true)) {
+ return false;
+ }
+ }
+
+ // try to load soft pre-dependencies
+ for (const auto& [module, softdep] : module_pre_softdep_) {
+ if (module_name == module) {
+ LoadWithAliases(softdep, false);
+ }
+ }
+
+ // load target module itself with args
+ if (!Insmod(dependencies[0])) {
+ return false;
+ }
+
+ // try to load soft post-dependencies
+ for (const auto& [module, softdep] : module_post_softdep_) {
+ if (module_name == module) {
+ LoadWithAliases(softdep, false);
+ }
+ }
+
+ return true;
+}
+
+bool Modprobe::LoadWithAliases(const std::string& module_name, bool strict) {
+ std::set<std::string> modules_to_load = {module_name};
+ bool module_loaded = false;
+
+ // use aliases to expand list of modules to load (multiple modules
+ // may alias themselves to the requested name)
+ for (const auto& [alias, aliased_module] : module_aliases_) {
+ if (fnmatch(alias.c_str(), module_name.c_str(), 0) != 0) continue;
+ modules_to_load.emplace(aliased_module);
+ }
+
+ // attempt to load all modules aliased to this name
+ for (const auto& module : modules_to_load) {
+ if (!ModuleExists(module)) continue;
+ if (InsmodWithDeps(module)) module_loaded = true;
+ }
+
+ if (strict && !module_loaded) {
+ LOG(ERROR) << "LoadWithAliases did not find a module for " << module_name;
+ return false;
+ }
+ return true;
+}
+
+bool Modprobe::LoadListedModules() {
+ for (const auto& module : module_load_) {
+ if (!LoadWithAliases(module, true)) {
+ return false;
+ }
+ }
+ return true;
+}
diff --git a/libmodprobe/libmodprobe_ext.cpp b/libmodprobe/libmodprobe_ext.cpp
new file mode 100644
index 0000000..5f3a04d
--- /dev/null
+++ b/libmodprobe/libmodprobe_ext.cpp
@@ -0,0 +1,68 @@
+/*
+ * 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.
+ */
+
+#include <sys/stat.h>
+#include <sys/syscall.h>
+
+#include <android-base/logging.h>
+#include <android-base/unique_fd.h>
+
+#include <modprobe/modprobe.h>
+
+bool Modprobe::Insmod(const std::string& path_name) {
+ android::base::unique_fd fd(
+ TEMP_FAILURE_RETRY(open(path_name.c_str(), O_RDONLY | O_NOFOLLOW | O_CLOEXEC)));
+ if (fd == -1) {
+ LOG(ERROR) << "Could not open module '" << path_name << "'";
+ return false;
+ }
+
+ std::string options = "";
+ auto options_iter = module_options_.find(MakeCanonical(path_name));
+ if (options_iter != module_options_.end()) {
+ options = options_iter->second;
+ }
+
+ LOG(INFO) << "Loading module " << path_name << " with args \"" << options << "\"";
+ int ret = syscall(__NR_finit_module, fd.get(), options.c_str(), 0);
+ if (ret != 0) {
+ if (errno == EEXIST) {
+ // Module already loaded
+ return true;
+ }
+ LOG(ERROR) << "Failed to insmod '" << path_name << "' with args '" << options << "'";
+ return false;
+ }
+
+ LOG(INFO) << "Loaded kernel module " << path_name;
+ return true;
+}
+
+bool Modprobe::ModuleExists(const std::string& module_name) {
+ struct stat fileStat;
+ auto deps = GetDependencies(module_name);
+ if (deps.empty()) {
+ // missing deps can happen in the case of an alias
+ return false;
+ }
+ if (stat(deps.front().c_str(), &fileStat)) {
+ return false;
+ }
+ if (!S_ISREG(fileStat.st_mode)) {
+ return false;
+ }
+ return true;
+}
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();
+}
diff --git a/libmodprobe/libmodprobe_test.cpp b/libmodprobe/libmodprobe_test.cpp
new file mode 100644
index 0000000..481658d
--- /dev/null
+++ b/libmodprobe/libmodprobe_test.cpp
@@ -0,0 +1,134 @@
+/*
+ * 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 <functional>
+
+#include <android-base/file.h>
+#include <android-base/macros.h>
+#include <android-base/unique_fd.h>
+#include <gtest/gtest.h>
+
+#include <modprobe/modprobe.h>
+
+#include "libmodprobe_test.h"
+
+// Used by libmodprobe_ext_test to check if requested modules are present.
+std::vector<std::string> test_modules;
+
+// Used by libmodprobe_ext_test to report which modules would have been loaded.
+std::vector<std::string> modules_loaded;
+
+TEST(libmodprobe, Test) {
+ test_modules = {
+ "/test1.ko", "/test2.ko", "/test3.ko", "/test4.ko", "/test5.ko",
+ "/test6.ko", "/test7.ko", "/test8.ko", "/test9.ko", "/test10.ko",
+ "/test11.ko", "/test12.ko", "/test13.ko", "/test14.ko", "/test15.ko",
+ };
+
+ std::vector<std::string> expected_modules_loaded = {
+ "/test14.ko",
+ "/test15.ko",
+ "/test3.ko",
+ "/test4.ko",
+ "/test1.ko",
+ "/test6.ko",
+ "/test2.ko",
+ "/test5.ko",
+ "/test8.ko",
+ "/test7.ko param1=4",
+ "/test9.ko param_x=1 param_y=2 param_z=3",
+ "/test10.ko",
+ "/test12.ko",
+ "/test11.ko",
+ "/test13.ko",
+ };
+
+ const std::string modules_dep =
+ "test1.ko:\n"
+ "test2.ko:\n"
+ "test3.ko:\n"
+ "test4.ko: test3.ko\n"
+ "test5.ko: test2.ko test6.ko\n"
+ "test6.ko:\n"
+ "test7.ko:\n"
+ "test8.ko:\n"
+ "test9.ko:\n"
+ "test10.ko:\n"
+ "test11.ko:\n"
+ "test12.ko:\n"
+ "test13.ko:\n"
+ "test14.ko:\n"
+ "test15.ko:\n";
+
+ const std::string modules_softdep =
+ "softdep test7 pre: test8\n"
+ "softdep test9 post: test10\n"
+ "softdep test11 pre: test12 post: test13\n"
+ "softdep test3 pre: test141516\n";
+
+ const std::string modules_alias =
+ "# Aliases extracted from modules themselves.\n"
+ "\n"
+ "alias test141516 test14\n"
+ "alias test141516 test15\n"
+ "alias test141516 test16\n";
+
+ const std::string modules_options =
+ "options test7.ko param1=4\n"
+ "options test9.ko param_x=1 param_y=2 param_z=3\n"
+ "options test100.ko param_1=1\n";
+
+ const std::string modules_load =
+ "test4.ko\n"
+ "test1.ko\n"
+ "test3.ko\n"
+ "test5.ko\n"
+ "test7.ko\n"
+ "test9.ko\n"
+ "test11.ko\n";
+
+ TemporaryDir dir;
+ ASSERT_TRUE(android::base::WriteStringToFile(
+ modules_alias, std::string(dir.path) + "/modules.alias", 0600, getuid(), getgid()));
+
+ ASSERT_TRUE(android::base::WriteStringToFile(
+ modules_dep, std::string(dir.path) + "/modules.dep", 0600, getuid(), getgid()));
+ ASSERT_TRUE(android::base::WriteStringToFile(
+ modules_softdep, std::string(dir.path) + "/modules.softdep", 0600, getuid(), getgid()));
+ ASSERT_TRUE(android::base::WriteStringToFile(
+ modules_options, std::string(dir.path) + "/modules.options", 0600, getuid(), getgid()));
+ ASSERT_TRUE(android::base::WriteStringToFile(
+ modules_load, std::string(dir.path) + "/modules.load", 0600, getuid(), getgid()));
+
+ for (auto i = test_modules.begin(); i != test_modules.end(); ++i) {
+ *i = dir.path + *i;
+ }
+
+ Modprobe m({dir.path});
+ EXPECT_TRUE(m.LoadListedModules());
+
+ GTEST_LOG_(INFO) << "Expected modules loaded (in order):";
+ for (auto i = expected_modules_loaded.begin(); i != expected_modules_loaded.end(); ++i) {
+ *i = dir.path + *i;
+ GTEST_LOG_(INFO) << "\"" << *i << "\"";
+ }
+ GTEST_LOG_(INFO) << "Actual modules loaded (in order):";
+ for (auto i = modules_loaded.begin(); i != modules_loaded.end(); ++i) {
+ GTEST_LOG_(INFO) << "\"" << *i << "\"";
+ }
+
+ EXPECT_TRUE(modules_loaded == expected_modules_loaded);
+}
diff --git a/libmodprobe/libmodprobe_test.h b/libmodprobe/libmodprobe_test.h
new file mode 100644
index 0000000..a001b69
--- /dev/null
+++ b/libmodprobe/libmodprobe_test.h
@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+extern std::vector<std::string> test_modules;
+extern std::vector<std::string> modules_loaded;