248 	struct sackhole *hole;  in tcp_sackhole_alloc()  local
256 	hole = zalloc_flags(sack_hole_zone, Z_WAITOK | Z_NOFAIL);  in tcp_sackhole_alloc()
258 	hole->start = start;  in tcp_sackhole_alloc()
259 	hole->end = end;  in tcp_sackhole_alloc()
260 	hole->rxmit = start;  in tcp_sackhole_alloc()
265 	return hole;  in tcp_sackhole_alloc()
272 tcp_sackhole_free(struct tcpcb *tp, struct sackhole *hole)  in tcp_sackhole_free()  argument
274 	zfree(sack_hole_zone, hole);  in tcp_sackhole_free()
287 	struct sackhole *hole;  in tcp_sackhole_insert()  local
290 	hole = tcp_sackhole_alloc(tp, start, end);  in tcp_sackhole_insert()
291 	if (hole == NULL) {  in tcp_sackhole_insert()
294 	hole->rxmit_start = tcp_now;  in tcp_sackhole_insert()
297 		TAILQ_INSERT_AFTER(&tp->snd_holes, after, hole, scblink);  in tcp_sackhole_insert()
299 		TAILQ_INSERT_TAIL(&tp->snd_holes, hole, scblink);  in tcp_sackhole_insert()
304 		tp->sackhint.nexthole = hole;  in tcp_sackhole_insert()
307 	return hole;  in tcp_sackhole_insert()
314 tcp_sackhole_remove(struct tcpcb *tp, struct sackhole *hole)  in tcp_sackhole_remove()  argument
317 	if (tp->sackhint.nexthole == hole) {  in tcp_sackhole_remove()
318 		tp->sackhint.nexthole = TAILQ_NEXT(hole, scblink);  in tcp_sackhole_remove()
322 	TAILQ_REMOVE(&tp->snd_holes, hole, scblink);  in tcp_sackhole_remove()
325 	tcp_sackhole_free(tp, hole);  in tcp_sackhole_remove()
765 	struct sackhole *hole = NULL, *dbg_hole = NULL;  in tcp_sack_output()  local
770 	hole = tp->sackhint.nexthole;  in tcp_sack_output()
771 	if (hole == NULL || SEQ_LT(hole->rxmit, hole->end)) {  in tcp_sack_output()
774 	while ((hole = TAILQ_NEXT(hole, scblink)) != NULL) {  in tcp_sack_output()
775 		if (SEQ_LT(hole->rxmit, hole->end)) {  in tcp_sack_output()
776 			tp->sackhint.nexthole = hole;  in tcp_sack_output()
781 	if (dbg_hole != hole) {  in tcp_sack_output()
783 		hole = dbg_hole;  in tcp_sack_output()
791 	return hole;  in tcp_sack_output()
797 	struct sackhole *hole = TAILQ_FIRST(&tp->snd_holes);  in tcp_sack_lost_rexmit()  local
799 	while (hole) {  in tcp_sack_lost_rexmit()
800 		hole->rxmit = hole->start;  in tcp_sack_lost_rexmit()
801 		hole->rxmit_start = tcp_now;  in tcp_sack_lost_rexmit()
803 		hole = TAILQ_NEXT(hole, scblink);  in tcp_sack_lost_rexmit()