95 		/* We analyse the number of packets that get ACK'd per RTT  in rxrpc_congestion_management()
187 	/* Send some previously unsent DATA if we have some to advance the ACK  in rxrpc_congestion_management()
217  * Apply a hard ACK by advancing the Tx window.
276  * or a final ACK packet.
404  * (that information is encoded in the ACK packet).
437 	u8 ack = 0, flags, annotation = 0;  in rxrpc_input_data()  local
476 		ack = RXRPC_ACK_EXCEEDS_WINDOW;  in rxrpc_input_data()
478 		goto ack;  in rxrpc_input_data()
484 			ack = RXRPC_ACK_NOSPACE;  in rxrpc_input_data()
486 			goto ack;  in rxrpc_input_data()
514 		ack = RXRPC_ACK_DUPLICATE;  in rxrpc_input_data()
519 	if (flags & RXRPC_REQUEST_ACK && !ack) {  in rxrpc_input_data()
520 		ack = RXRPC_ACK_REQUESTED;  in rxrpc_input_data()
526 		if (ack != RXRPC_ACK_DUPLICATE) {  in rxrpc_input_data()
527 			ack = RXRPC_ACK_DUPLICATE;  in rxrpc_input_data()
549 		/* Send an immediate ACK if we fill in a hole */  in rxrpc_input_data()
550 		if (!ack) {  in rxrpc_input_data()
551 			ack = RXRPC_ACK_DELAY;  in rxrpc_input_data()
567 			ack = RXRPC_ACK_OUT_OF_SEQUENCE;  in rxrpc_input_data()
587 			ack = RXRPC_ACK_EXCEEDS_WINDOW;  in rxrpc_input_data()
593 			goto ack;  in rxrpc_input_data()
600 	if (queued && flags & RXRPC_LAST_PACKET && !ack) {  in rxrpc_input_data()
601 		ack = RXRPC_ACK_DELAY;  in rxrpc_input_data()
605 ack:  in rxrpc_input_data()
606 	if (ack)  in rxrpc_input_data()
607 		rxrpc_propose_ACK(call, ack, skew, ack_serial,  in rxrpc_input_data()
624  * Process a requested ACK.
657  * Process the response to a ping that we sent to find out if we lost an ACK.
722  * Process the extra information that may be appended to an ACK packet
733 	_proto("Rx ACK %%%u Info { rx=%u max=%u rwin=%u jm=%u }",  in rxrpc_input_ackinfo()
768  * Each ACK in the array corresponds to one packet and can be either an ACK or
770  * packets that lie beyond the end of the ACK list are scheduled for resend by
772  * the time the ACK was sent.
817  * Return true if the ACK is valid - ie. it doesn't appear to have regressed
818  * with respect to the ack state conveyed by preceding ACKs.
841  * Process an ACK packet.
843  * ack.firstPacket is the sequence number of the first soft-ACK'd/NAK'd packet
844  * in the ACK array.  Anything before that is hard-ACK'd and may be discarded.
846  * A hard-ACK means that a packet has been processed and may be discarded; a
847  * soft-ACK means that the packet may be discarded and retransmission
848  * requested.  A phase is complete when all packets are hard-ACK'd.
856 		struct rxrpc_ackpacket ack;  in rxrpc_input_ack()  member
867 	if (skb_copy_bits(skb, offset, &buf.ack, sizeof(buf.ack)) < 0) {  in rxrpc_input_ack()
871 	offset += sizeof(buf.ack);  in rxrpc_input_ack()
873 	acked_serial = ntohl(buf.ack.serial);  in rxrpc_input_ack()
874 	first_soft_ack = ntohl(buf.ack.firstPacket);  in rxrpc_input_ack()
875 	prev_pkt = ntohl(buf.ack.previousPacket);  in rxrpc_input_ack()
877 	nr_acks = buf.ack.nAcks;  in rxrpc_input_ack()
878 	summary.ack_reason = (buf.ack.reason < RXRPC_ACK__INVALID ?  in rxrpc_input_ack()
879 			      buf.ack.reason : RXRPC_ACK__INVALID);  in rxrpc_input_ack()
885 	if (buf.ack.reason == RXRPC_ACK_PING_RESPONSE)  in rxrpc_input_ack()
888 	if (buf.ack.reason == RXRPC_ACK_REQUESTED)  in rxrpc_input_ack()
892 	if (buf.ack.reason == RXRPC_ACK_PING) {  in rxrpc_input_ack()
893 		_proto("Rx ACK %%%u PING Request", sp->hdr.serial);  in rxrpc_input_ack()