83 		/* We analyse the number of packets that get ACK'd per RTT  in rxrpc_congestion_management()
176 	/* Send some previously unsent DATA if we have some to advance the ACK  in rxrpc_congestion_management()
215  * Apply a hard ACK by advancing the Tx window.
259  * or a final ACK packet.
430 		/* Send an immediate ACK if we fill in a hole */  in rxrpc_input_data_one()
695  * Process the extra information that may be appended to an ACK packet
730  * Determine how many nacks from the previous ACK have now been satisfied.
737 	struct rxrpc_ackpacket ack;  in rxrpc_input_check_prev_ack()  local
741 	u8 *acks = skb->data + sizeof(struct rxrpc_wire_header) + sizeof(ack);  in rxrpc_input_check_prev_ack()
769  * Each ACK in the array corresponds to one packet and can be either an ACK or
771  * packets that lie beyond the end of the ACK list are scheduled for resend by
773  * the time the ACK was sent.
794 				/* Overlap with previous ACK */  in rxrpc_input_soft_acks()
823  * Return true if the ACK is valid - ie. it doesn't appear to have regressed
824  * with respect to the ack state conveyed by preceding ACKs.
847  * Process an ACK packet.
849  * ack.firstPacket is the sequence number of the first soft-ACK'd/NAK'd packet
850  * in the ACK array.  Anything before that is hard-ACK'd and may be discarded.
852  * A hard-ACK means that a packet has been processed and may be discarded; a
853  * soft-ACK means that the packet may be discarded and retransmission
854  * requested.  A phase is complete when all packets are hard-ACK'd.
859 	struct rxrpc_ackpacket ack;  in rxrpc_input_ack()  local
869 	if (skb_copy_bits(skb, offset, &ack, sizeof(ack)) < 0)  in rxrpc_input_ack()
871 	offset += sizeof(ack);  in rxrpc_input_ack()
874 	acked_serial = ntohl(ack.serial);  in rxrpc_input_ack()
875 	first_soft_ack = ntohl(ack.firstPacket);  in rxrpc_input_ack()
876 	prev_pkt = ntohl(ack.previousPacket);  in rxrpc_input_ack()
878 	nr_acks = ack.nAcks;  in rxrpc_input_ack()
881 	summary.ack_reason = (ack.reason < RXRPC_ACK__INVALID ?  in rxrpc_input_ack()
882 			      ack.reason : RXRPC_ACK__INVALID);  in rxrpc_input_ack()
887 	rxrpc_inc_stat(call->rxnet, stat_rx_acks[ack.reason]);  in rxrpc_input_ack()
890 		switch (ack.reason) {  in rxrpc_input_ack()
906 	/* If we get an EXCEEDS_WINDOW ACK from the server, it probably  in rxrpc_input_ack()
910 	if (unlikely(ack.reason == RXRPC_ACK_EXCEEDS_WINDOW) &&  in rxrpc_input_ack()
919 	/* If we get an OUT_OF_SEQUENCE ACK from the server, that can also  in rxrpc_input_ack()
923 	if (unlikely(ack.reason == RXRPC_ACK_OUT_OF_SEQUENCE) &&  in rxrpc_input_ack()
964 	switch (ack.reason) {  in rxrpc_input_ack()
1021 	if (ack.reason == RXRPC_ACK_PING)  in rxrpc_input_ack()