P_TRIM
enum drbd_packet cmd = (dp_flags & DP_ZEROES) ? P_ZEROES : P_TRIM;
[P_TRIM] = "Trim",
struct p_trim *trim = (pi->cmd == P_TRIM) ? pi->data : NULL;
if (pi->cmd == P_TRIM) {
[P_TRIM] = { 0, sizeof(struct p_trim), receive_Data },