libmodprobe: add verbose mode

Change-Id: I2be18320461cd712a4828400b8f29bb5f07c801f

1 files changed, 3 insertions, 0 deletions

diff --git a/libmodprobe/libmodprobe_ext.cpp b/libmodprobe/libmodprobe_ext.cpp
index 3e9ff70cb..2efcac290 100644
--- a/libmodprobe/libmodprobe_ext.cpp
+++ b/libmodprobe/libmodprobe_ext.cpp
@@ -66,6 +66,7 @@ bool Modprobe::Rmmod(const std::string& module_name) {
 bool Modprobe::ModuleExists(const std::string& module_name) {
     struct stat fileStat;
     if (blacklist_enabled && module_blacklist_.count(module_name)) {
+        LOG(INFO) << "module " << module_name << " is blacklisted";
         return false;
     }
     auto deps = GetDependencies(module_name);
@@ -74,9 +75,11 @@ bool Modprobe::ModuleExists(const std::string& module_name) {
         return false;
     }
     if (stat(deps.front().c_str(), &fileStat)) {
+        LOG(INFO) << "module " << module_name << " does not exist";
         return false;
     }
     if (!S_ISREG(fileStat.st_mode)) {
+        LOG(INFO) << "module " << module_name << " is not a regular file";
         return false;
     }
     return true;