Merge "Migrate mount/umount operations to a dedicated mMountsLock." am: b78dbeae20 am: 4b9691c727 am: 4f8df2c51a

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1897160

Change-Id: I175ba8263f1c004f5221bb879a0741e1c15a0dcb
diff --git a/cmds/installd/InstalldNativeService.cpp b/cmds/installd/InstalldNativeService.cpp
index f35abda..9ee1cc1 100644
--- a/cmds/installd/InstalldNativeService.cpp
+++ b/cmds/installd/InstalldNativeService.cpp
@@ -3011,8 +3011,9 @@
 
     const char* uuid_ = uuid->c_str();
 
+    std::lock_guard<std::recursive_mutex> lock(mMountsLock);
+
     std::string mirrorVolCePath(StringPrintf("%s/%s", kDataMirrorCePath, uuid_));
-    std::lock_guard<std::recursive_mutex> lock(mLock);
     if (fs_prepare_dir(mirrorVolCePath.c_str(), 0711, AID_SYSTEM, AID_SYSTEM) != 0) {
         return error("Failed to create CE mirror");
     }
@@ -3081,8 +3082,9 @@
     std::string mirrorCeVolPath(StringPrintf("%s/%s", kDataMirrorCePath, uuid_));
     std::string mirrorDeVolPath(StringPrintf("%s/%s", kDataMirrorDePath, uuid_));
 
+    std::lock_guard<std::recursive_mutex> lock(mMountsLock);
+
     // Unmount CE storage
-    std::lock_guard<std::recursive_mutex> lock(mLock);
     if (TEMP_FAILURE_RETRY(umount(mirrorCeVolPath.c_str())) != 0) {
         if (errno != ENOENT) {
             res = error(StringPrintf("Failed to umount %s %s", mirrorCeVolPath.c_str(),