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libmodprobe: add GetAllDependencies

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Add a method to retrieve the dependencies (both hard and soft) of a
module.

Change-Id: Ie44ceb3e36856bb1a3e68c5d3c0d55a38deb0ef9
This commit is contained in:
Steve Muckle 2019-08-01 14:55:07 -07:00
parent 012cfa19b0
commit 781aa78ee2
2 changed files with 36 additions and 0 deletions
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3
libmodprobe/include/modprobe/modprobe.h
View file

@ -30,6 +30,9 @@ class Modprobe {
const std::string& parameters = ""); const std::string& parameters = "");
bool Remove(const std::string& module_name); bool Remove(const std::string& module_name);
std::vector<std::string> ListModules(const std::string& pattern); 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 EnableBlacklist(bool enable); void EnableBlacklist(bool enable);
private: private:

33
libmodprobe/libmodprobe.cpp
View file

@ -376,3 +376,36 @@ std::vector<std::string> Modprobe::ListModules(const std::string& pattern) {
} }
return rv; return rv;
} }
bool Modprobe::GetAllDependencies(const std::string& module,
std::vector<std::string>* pre_dependencies,
std::vector<std::string>* dependencies,
std::vector<std::string>* post_dependencies) {
std::string canonical_name = MakeCanonical(module);
if (pre_dependencies) {
pre_dependencies->clear();
for (const auto& [it_module, it_softdep] : module_pre_softdep_) {
if (canonical_name == it_module) {
pre_dependencies->emplace_back(it_softdep);
}
}
}
if (dependencies) {
dependencies->clear();
auto hard_deps = GetDependencies(canonical_name);
if (hard_deps.empty()) {
return false;
}
for (auto dep = hard_deps.rbegin(); dep != hard_deps.rend(); dep++) {
dependencies->emplace_back(*dep);
}
}
if (post_dependencies) {
for (const auto& [it_module, it_softdep] : module_post_softdep_) {
if (canonical_name == it_module) {
post_dependencies->emplace_back(it_softdep);
}
}
}
return true;
}