145  * @last_gap: last gap ack blocks for bcast (FIXME)
146  * @last_ga: ptr to gap ack blocks
281 				     u16 acked, u16 gap,
426 	u16 gap = 0;  in link_bc_rcv_gap()  local
429 		gap = l->snd_nxt - l->rcv_nxt;  in link_bc_rcv_gap()
431 		gap = buf_seqno(skb) - l->rcv_nxt;  in link_bc_rcv_gap()
432 	return gap;  in link_bc_rcv_gap()
1431  * tipc_get_gap_ack_blks - get Gap ACK blocks from PROTOCOL/STATE_MSG
1432  * @ga: returned pointer to the Gap ACK blocks if any
1435  * @uc: desired Gap ACK blocks type, i.e. unicast (= 1) or broadcast (= 0)
1437  * Return: the total Gap ACK blocks size
1445 	/* Does peer support the Gap ACK blocks feature? */  in tipc_get_gap_ack_blks()
1486 			gacks[n].gap = htons(seqno - expect);  in __tipc_build_gap_ack_blks()
1502 	gacks[n].gap = 0;  in __tipc_build_gap_ack_blks()
1507 /* tipc_build_gap_ack_blks - build Gap ACK blocks
1509  * @hdr: the tipc message buffer to store the Gap ACK blocks after built
1511  * The function builds Gap ACK blocks for both the unicast & broadcast receiver
1548  * @gap: # of gap packets
1549  * @ga: buffer pointer to Gap ACK blocks from peer
1558 				     u16 acked, u16 gap,  in tipc_link_advance_transmq()  argument
1568 	u16 nacked = acked, ngap = gap, gack_cnt = 0;  in tipc_link_advance_transmq()
1577 	trace_tipc_link_retrans(r, acked + 1, acked + gap, &l->transmq);  in tipc_link_advance_transmq()
1579 	/* Determine Gap ACK blocks if any for the particular link */  in tipc_link_advance_transmq()
1581 		/* Get the Gap ACKs, uc part */  in tipc_link_advance_transmq()
1585 		/* Copy the Gap ACKs, bc part, for later renewal if needed */  in tipc_link_advance_transmq()
1590 			/* Start with the bc Gap ACKs */  in tipc_link_advance_transmq()
1595 			pr_warn_ratelimited("Ignoring bc Gap ACKs, no memory\n");  in tipc_link_advance_transmq()
1610 			/* Get the next of last Gap ACK blocks */  in tipc_link_advance_transmq()
1616 				offset = ntohs(last_ga->gacks[si].gap);  in tipc_link_advance_transmq()
1622 					  "Corrupted Gap ACK: %d %d %d %d %d\n",  in tipc_link_advance_transmq()
1626 			/* Check against the last Gap ACK block */  in tipc_link_advance_transmq()
1638 			/* First gap: check if repeated retrans failures? */  in tipc_link_advance_transmq()
1641 				/* Ignore this bc Gap ACKs if any */  in tipc_link_advance_transmq()
1666 			/* retry with Gap ACK blocks if any */  in tipc_link_advance_transmq()
1670 			ngap = ntohs(gacks[n].gap);  in tipc_link_advance_transmq()
1676 	/* Renew last Gap ACK blocks for bc if needed */  in tipc_link_advance_transmq()
1681 			r->last_gap = gap;  in tipc_link_advance_transmq()
1825 		/* Defer delivery if sequence gap */  in tipc_link_rcv()
2208 	u16 gap = msg_seq_gap(hdr);  in tipc_link_proto_rcv()  local
2295 		/* Validate Gap ACK blocks, drop if invalid */  in tipc_link_proto_rcv()
2338 		released = tipc_link_advance_transmq(l, l, ack, gap, ga, xmitq,  in tipc_link_proto_rcv()
2340 		if (gap)  in tipc_link_proto_rcv()
2485 int tipc_link_bc_ack_rcv(struct tipc_link *r, u16 acked, u16 gap,  in tipc_link_bc_ack_rcv()  argument
2497 	if (gap) {  in tipc_link_bc_ack_rcv()
2502 	if (less(acked, r->acked) || (acked == r->acked && !gap && !ga))  in tipc_link_bc_ack_rcv()
2505 	trace_tipc_link_bc_ack(r, acked, gap, &l->transmq);  in tipc_link_bc_ack_rcv()
2506 	tipc_link_advance_transmq(l, r, acked, gap, ga, retrq, &unused, &rc);  in tipc_link_bc_ack_rcv()