Mandatory Operational Control Reporting and Performance Measures Act of 2012 - Directs the Secretary of Homeland Security (DHS), as part of DHS's annual performance report, to submit annual reports to Congress on: (1) the number of miles of the international land and maritime border between the United States and Canada and the United States and Mexico that are under operational DHS control, cumulatively and by sector; and (2) the estimated number of unlawful entries between ports of entry along the international land and maritime borders of the United States during the period covered by the report, determined using all available sources of data.