1LOOP_SET_FD 0x4C00 2LOOP_CLR_FD 0x4C01 3LOOP_SET_STATUS 0x4C02 4LOOP_GET_STATUS 0x4C03 5LOOP_SET_STATUS64 0x4C04 6LOOP_GET_STATUS64 0x4C05 7LOOP_CHANGE_FD 0x4C06 8LOOP_SET_CAPACITY 0x4C07 9LOOP_SET_DIRECT_IO 0x4C08 10LOOP_SET_BLOCK_SIZE 0x4C09 11LOOP_CTL_ADD 0x4C80 12LOOP_CTL_REMOVE 0x4C81 13LOOP_CTL_GET_FREE 0x4C82 14#stop 15