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add libmodprobe api to query the number of modules loaded

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In the short term this will be used to help implement support for
multiple kernel module directories but it may be useful in other
contexts as well.

Bug: 157645635
Change-Id: I15a252b6e9394292c8f3557ed65112c935830441
Merged-In: I15a252b6e9394292c8f3557ed65112c935830441
This commit is contained in:
Steve Muckle 2020-05-29 16:30:33 -07:00
parent 84db2e40e1
commit 8bafa9e28e
4 changed files with 6 additions and 0 deletions
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3
libmodprobe/include/modprobe/modprobe.h
View file

@ -34,6 +34,8 @@ class Modprobe {
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_; }
void EnableBlacklist(bool enable);
void EnableVerbose(bool enable);
@ -65,5 +67,6 @@ class Modprobe {
std::unordered_map<std::string, std::string> module_options_;
std::set<std::string> module_blacklist_;
std::unordered_set<std::string> module_loaded_;
int module_count_ = 0;
bool blacklist_enabled = false;
};

1
libmodprobe/libmodprobe_ext.cpp
View file

@ -63,6 +63,7 @@ bool Modprobe::Insmod(const std::string& path_name, const std::string& parameter
LOG(INFO) << "Loaded kernel module " << path_name;
module_loaded_.emplace(canonical_name);
module_count_++;
return true;
}

1
libmodprobe/libmodprobe_ext_test.cpp
View file

@ -56,6 +56,7 @@ bool Modprobe::Insmod(const std::string& path_name, const std::string& parameter
}
modules_loaded.emplace_back(path_name + options);
module_count_++;
return true;
}

1
libmodprobe/libmodprobe_test.cpp
View file

@ -161,6 +161,7 @@ TEST(libmodprobe, Test) {
EXPECT_TRUE(modules_loaded == expected_modules_loaded);
EXPECT_TRUE(m.GetModuleCount() == 15);
EXPECT_TRUE(m.Remove("test4"));
GTEST_LOG_(INFO) << "Expected modules loaded after removing test4 (in order):";