1095 	int	flag;  member
1198 					state->flag |= FLAG_ORIG_SACK_ACKED;  in tcp_sacktag_one()
1211 		state->flag |= FLAG_DATA_SACKED;  in tcp_sacktag_one()
1606 	state->flag = 0;  in tcp_sacktag_write_queue()
1618 		state->flag |= FLAG_DSACKING_ACK;  in tcp_sacktag_write_queue()
1788 	return state->flag;  in tcp_sacktag_write_queue()
1952 static bool tcp_check_sack_reneging(struct sock *sk, int flag)  in tcp_check_sack_reneging()  argument
1954 	if (flag & FLAG_SACK_RENEGING) {  in tcp_check_sack_reneging()
1991 static bool tcp_pause_early_retransmit(struct sock *sk, int flag)  in tcp_pause_early_retransmit()  argument
2001 	    (flag & FLAG_ECE) || !tp->srtt_us)  in tcp_pause_early_retransmit()
2108 static bool tcp_time_to_recover(struct sock *sk, int flag)  in tcp_time_to_recover()  argument
2152 		return !tcp_pause_early_retransmit(sk, flag);  in tcp_time_to_recover()
2473 			       int fast_rexmit, int flag)  in tcp_cwnd_reduction()  argument
2489 	} else if ((flag & FLAG_RETRANS_DATA_ACKED) &&  in tcp_cwnd_reduction()
2490 		   !(flag & FLAG_LOST_RETRANS)) {  in tcp_cwnd_reduction()
2542 static void tcp_try_to_open(struct sock *sk, int flag, const int prior_unsacked)  in tcp_try_to_open()  argument
2551 	if (flag & FLAG_ECE)  in tcp_try_to_open()
2557 		tcp_cwnd_reduction(sk, prior_unsacked, 0, flag);  in tcp_try_to_open()
2667 static void tcp_process_loss(struct sock *sk, int flag, bool is_dupack)  in tcp_process_loss()  argument
2672 	if ((flag & FLAG_SND_UNA_ADVANCED) &&  in tcp_process_loss()
2680 		if ((flag & FLAG_ORIG_SACK_ACKED) &&  in tcp_process_loss()
2685 			if (flag & FLAG_DATA_SACKED || is_dupack)  in tcp_process_loss()
2687 		} else if (flag & FLAG_SND_UNA_ADVANCED && !recovered) {  in tcp_process_loss()
2708 		else if (flag & FLAG_SND_UNA_ADVANCED)  in tcp_process_loss()
2716 				 const int prior_unsacked, int flag)  in tcp_try_undo_partial()  argument
2732 			tcp_cwnd_reduction(sk, prior_unsacked, 0, flag);  in tcp_try_undo_partial()
2761 				  bool is_dupack, int flag)  in tcp_fastretrans_alert()  argument
2765 	bool do_lost = is_dupack || ((flag & FLAG_DATA_SACKED) &&  in tcp_fastretrans_alert()
2776 	if (flag & FLAG_ECE)  in tcp_fastretrans_alert()
2780 	if (tcp_check_sack_reneging(sk, flag))  in tcp_fastretrans_alert()
2815 		flag |= FLAG_LOST_RETRANS;  in tcp_fastretrans_alert()
2820 		if (!(flag & FLAG_SND_UNA_ADVANCED)) {  in tcp_fastretrans_alert()
2824 			if (tcp_try_undo_partial(sk, acked, prior_unsacked, flag))  in tcp_fastretrans_alert()
2836 		tcp_process_loss(sk, flag, is_dupack);  in tcp_fastretrans_alert()
2838 		    !(flag & FLAG_LOST_RETRANS))  in tcp_fastretrans_alert()
2843 			if (flag & FLAG_SND_UNA_ADVANCED)  in tcp_fastretrans_alert()
2852 		if (!tcp_time_to_recover(sk, flag)) {  in tcp_fastretrans_alert()
2853 			tcp_try_to_open(sk, flag, prior_unsacked);  in tcp_fastretrans_alert()
2869 		tcp_enter_recovery(sk, (flag & FLAG_ECE));  in tcp_fastretrans_alert()
2875 	tcp_cwnd_reduction(sk, prior_unsacked, fast_rexmit, flag);  in tcp_fastretrans_alert()
2939 static inline bool tcp_ack_update_rtt(struct sock *sk, const int flag,  in tcp_ack_update_rtt()  argument
2960 	    flag & FLAG_ACKED)  in tcp_ack_update_rtt()
3113 	int flag = 0;  in tcp_clean_rtx_queue()  local
3144 			flag |= FLAG_RETRANS_DATA_ACKED;  in tcp_clean_rtx_queue()
3153 				flag |= FLAG_ORIG_SACK_ACKED;  in tcp_clean_rtx_queue()
3174 			flag |= FLAG_DATA_ACKED;  in tcp_clean_rtx_queue()
3176 			flag |= FLAG_SYN_ACKED;  in tcp_clean_rtx_queue()
3195 		flag |= FLAG_SACK_RENEGING;  in tcp_clean_rtx_queue()
3198 	if (likely(first_ackt.v64) && !(flag & FLAG_RETRANS_DATA_ACKED)) {  in tcp_clean_rtx_queue()
3207 	rtt_update = tcp_ack_update_rtt(sk, flag, seq_rtt_us, sack_rtt_us,  in tcp_clean_rtx_queue()
3210 	if (flag & FLAG_ACKED) {  in tcp_clean_rtx_queue()
3268 	return flag;  in tcp_clean_rtx_queue()
3292 static inline bool tcp_ack_is_dubious(const struct sock *sk, const int flag)  in tcp_ack_is_dubious()  argument
3294 	return !(flag & FLAG_NOT_DUP) || (flag & FLAG_CA_ALERT) ||  in tcp_ack_is_dubious()
3299 static inline bool tcp_may_raise_cwnd(const struct sock *sk, const int flag)  in tcp_may_raise_cwnd()  argument
3311 		return flag & FLAG_FORWARD_PROGRESS;  in tcp_may_raise_cwnd()
3313 	return flag & FLAG_DATA_ACKED;  in tcp_may_raise_cwnd()
3359 	int flag = 0;  in tcp_ack_update_window()  local
3366 		flag |= FLAG_WIN_UPDATE;  in tcp_ack_update_window()
3390 	return flag;  in tcp_ack_update_window()
3476 static void tcp_process_tlp_ack(struct sock *sk, u32 ack, int flag)  in tcp_process_tlp_ack()  argument
3483 	if (flag & FLAG_DSACKING_ACK) {  in tcp_process_tlp_ack()
3496 	} else if (!(flag & (FLAG_SND_UNA_ADVANCED |  in tcp_process_tlp_ack()
3512 static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag)  in tcp_ack()  argument
3554 		flag |= FLAG_SND_UNA_ADVANCED;  in tcp_ack()
3563 	if (flag & FLAG_UPDATE_TS_RECENT)  in tcp_ack()
3566 	if (!(flag & FLAG_SLOWPATH) && after(ack, prior_snd_una)) {  in tcp_ack()
3573 		flag |= FLAG_WIN_UPDATE;  in tcp_ack()
3582 			flag |= FLAG_DATA;  in tcp_ack()
3586 		flag |= tcp_ack_update_window(sk, skb, ack, ack_seq);  in tcp_ack()
3589 			flag |= tcp_sacktag_write_queue(sk, skb, prior_snd_una,  in tcp_ack()
3593 			flag |= FLAG_ECE;  in tcp_ack()
3597 		if (flag & FLAG_WIN_UPDATE)  in tcp_ack()
3614 	flag |= tcp_clean_rtx_queue(sk, prior_fackets, prior_snd_una,  in tcp_ack()
3618 	if (tcp_ack_is_dubious(sk, flag)) {  in tcp_ack()
3619 		is_dupack = !(flag & (FLAG_SND_UNA_ADVANCED | FLAG_NOT_DUP));  in tcp_ack()
3621 				      is_dupack, flag);  in tcp_ack()
3624 		tcp_process_tlp_ack(sk, ack, flag);  in tcp_ack()
3627 	if (tcp_may_raise_cwnd(sk, flag))  in tcp_ack()
3630 	if ((flag & FLAG_FORWARD_PROGRESS) || !(flag & FLAG_NOT_DUP)) {  in tcp_ack()
3643 	if (flag & FLAG_DSACKING_ACK)  in tcp_ack()
3645 				      is_dupack, flag);  in tcp_ack()
3654 		tcp_process_tlp_ack(sk, ack, flag);  in tcp_ack()
3666 		flag |= tcp_sacktag_write_queue(sk, skb, prior_snd_una,  in tcp_ack()
3669 				      is_dupack, flag);  in tcp_ack()