P_NEG_ACK
[P_NEG_ACK] = "NegAck",
err = drbd_send_ack(peer_device, P_NEG_ACK, peer_req);
drbd_send_ack_dp(peer_device, P_NEG_ACK, p, pi->size);
err = drbd_send_ack(peer_device, P_NEG_ACK, peer_req);
drbd_send_ack_dp(peer_device, P_NEG_ACK, p, pi->size);
drbd_send_ack_ex(peer_device, P_NEG_ACK, sector, size, ID_SYNCER);
[P_NEG_ACK] = { sizeof(struct p_block_ack), got_NegAck },