MTP: Add support for restricting PTP to only certain subdirectories of the storage

Bug: 5527220

Change-Id: If68e7481617ecb62abd24e2d89e6b7dfdf95ba2b
Signed-off-by: Mike Lockwood <lockwood@google.com>
diff --git a/media/mtp/MtpServer.cpp b/media/mtp/MtpServer.cpp
index 51eb97f..1334e6c 100644
--- a/media/mtp/MtpServer.cpp
+++ b/media/mtp/MtpServer.cpp
@@ -1053,11 +1053,14 @@
     int result = mDatabase->getObjectFilePath(handle, filePath, fileLength, format);
     if (result == MTP_RESPONSE_OK) {
         ALOGV("deleting %s", (const char *)filePath);
-        deletePath((const char *)filePath);
-        return mDatabase->deleteFile(handle);
-    } else {
-        return result;
+        result = mDatabase->deleteFile(handle);
+        // Don't delete the actual files unless the database deletion is allowed
+        if (result == MTP_RESPONSE_OK) {
+            deletePath((const char *)filePath);
+        }
     }
+
+    return result;
 }
 
 MtpResponseCode MtpServer::doGetObjectPropDesc() {