74 		/* We analyse the number of packets that get ACK'd per RTT  in rxrpc_congestion_management()
166 	/* Send some previously unsent DATA if we have some to advance the ACK  in rxrpc_congestion_management()
205  * Apply a hard ACK by advancing the Tx window.
250  * or a final ACK packet.
416 		/* Send an immediate ACK if we fill in a hole */  in rxrpc_input_data_one()
672  * Process the extra information that may be appended to an ACK packet
712  * Each ACK in the array corresponds to one packet and can be either an ACK or
714  * packets that lie beyond the end of the ACK list are scheduled for resend by
716  * the time the ACK was sent.
740  * Return true if the ACK is valid - ie. it doesn't appear to have regressed
741  * with respect to the ack state conveyed by preceding ACKs.
764  * Process an ACK packet.
766  * ack.firstPacket is the sequence number of the first soft-ACK'd/NAK'd packet
767  * in the ACK array.  Anything before that is hard-ACK'd and may be discarded.
769  * A hard-ACK means that a packet has been processed and may be discarded; a
770  * soft-ACK means that the packet may be discarded and retransmission
771  * requested.  A phase is complete when all packets are hard-ACK'd.
776 	struct rxrpc_ackpacket ack;  in rxrpc_input_ack()  local
786 	if (skb_copy_bits(skb, offset, &ack, sizeof(ack)) < 0)  in rxrpc_input_ack()
788 	offset += sizeof(ack);  in rxrpc_input_ack()
791 	acked_serial = ntohl(ack.serial);  in rxrpc_input_ack()
792 	first_soft_ack = ntohl(ack.firstPacket);  in rxrpc_input_ack()
793 	prev_pkt = ntohl(ack.previousPacket);  in rxrpc_input_ack()
795 	nr_acks = ack.nAcks;  in rxrpc_input_ack()
796 	summary.ack_reason = (ack.reason < RXRPC_ACK__INVALID ?  in rxrpc_input_ack()
797 			      ack.reason : RXRPC_ACK__INVALID);  in rxrpc_input_ack()
802 	rxrpc_inc_stat(call->rxnet, stat_rx_acks[ack.reason]);  in rxrpc_input_ack()
804 	switch (ack.reason) {  in rxrpc_input_ack()
820 	if (ack.reason == RXRPC_ACK_PING) {  in rxrpc_input_ack()
828 	/* If we get an EXCEEDS_WINDOW ACK from the server, it probably  in rxrpc_input_ack()
832 	if (unlikely(ack.reason == RXRPC_ACK_EXCEEDS_WINDOW) &&  in rxrpc_input_ack()
841 	/* If we get an OUT_OF_SEQUENCE ACK from the server, that can also  in rxrpc_input_ack()
845 	if (unlikely(ack.reason == RXRPC_ACK_OUT_OF_SEQUENCE) &&  in rxrpc_input_ack()
876 	switch (ack.reason) {  in rxrpc_input_ack()