From b4b7ff4b08e691656c9d77c758fc355833128ac0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 20 Jan 2016 14:01:31 -0300
Subject: Linux-libre 4.4-gnu

---
 include/linux/tcp.h | 46 ++++++++++++++++++++++++----------------------
 1 file changed, 24 insertions(+), 22 deletions(-)

(limited to 'include/linux/tcp.h')

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 904686638..4e92c0fc7 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -113,10 +113,11 @@ struct tcp_request_sock_ops;
 struct tcp_request_sock {
 	struct inet_request_sock 	req;
 	const struct tcp_request_sock_ops *af_specific;
+	struct skb_mstamp		snt_synack; /* first SYNACK sent time */
 	bool				tfo_listener;
+	u32				txhash;
 	u32				rcv_isn;
 	u32				snt_isn;
-	u32				snt_synack; /* synack sent time */
 	u32				last_oow_ack_time; /* last SYNACK */
 	u32				rcv_nxt; /* the ack # by SYNACK. For
 						  * FastOpen it's the seq#
@@ -194,6 +195,12 @@ struct tcp_sock {
 	u32	window_clamp;	/* Maximal window to advertise		*/
 	u32	rcv_ssthresh;	/* Current window clamp			*/
 
+	/* Information of the most recently (s)acked skb */
+	struct tcp_rack {
+		struct skb_mstamp mstamp; /* (Re)sent time of the skb */
+		u8 advanced; /* mstamp advanced since last lost marking */
+		u8 reord;    /* reordering detected */
+	} rack;
 	u16	advmss;		/* Advertised MSS			*/
 	u8	unused;
 	u8	nonagle     : 4,/* Disable Nagle algorithm?             */
@@ -217,6 +224,9 @@ struct tcp_sock {
 	u32	mdev_max_us;	/* maximal mdev for the last rtt period	*/
 	u32	rttvar_us;	/* smoothed mdev_max			*/
 	u32	rtt_seq;	/* sequence number to update rttvar	*/
+	struct rtt_meas {
+		u32 rtt, ts;	/* RTT in usec and sampling time in jiffies. */
+	} rtt_min[3];
 
 	u32	packets_out;	/* Packets which are "in flight"	*/
 	u32	retrans_out;	/* Retransmitted packets out		*/
@@ -280,8 +290,6 @@ struct tcp_sock {
 	int     lost_cnt_hint;
 	u32     retransmit_high;	/* L-bits may be on up to this seqno */
 
-	u32	lost_retrans_low;	/* Sent seq after any rxmit (lowest) */
-
 	u32	prior_ssthresh; /* ssthresh saved at recovery start	*/
 	u32	high_seq;	/* snd_nxt at onset of congestion	*/
 
@@ -371,8 +379,8 @@ static inline struct tcp_sock *tcp_sk(const struct sock *sk)
 
 struct tcp_timewait_sock {
 	struct inet_timewait_sock tw_sk;
-	u32			  tw_rcv_nxt;
-	u32			  tw_snd_nxt;
+#define tw_rcv_nxt tw_sk.__tw_common.skc_tw_rcv_nxt
+#define tw_snd_nxt tw_sk.__tw_common.skc_tw_snd_nxt
 	u32			  tw_rcv_wnd;
 	u32			  tw_ts_offset;
 	u32			  tw_ts_recent;
@@ -397,25 +405,19 @@ static inline bool tcp_passive_fastopen(const struct sock *sk)
 		tcp_sk(sk)->fastopen_rsk != NULL);
 }
 
-extern void tcp_sock_destruct(struct sock *sk);
+static inline void fastopen_queue_tune(struct sock *sk, int backlog)
+{
+	struct request_sock_queue *queue = &inet_csk(sk)->icsk_accept_queue;
+	int somaxconn = READ_ONCE(sock_net(sk)->core.sysctl_somaxconn);
+
+	queue->fastopenq.max_qlen = min_t(unsigned int, backlog, somaxconn);
+}
 
-static inline int fastopen_init_queue(struct sock *sk, int backlog)
+static inline void tcp_move_syn(struct tcp_sock *tp,
+				struct request_sock *req)
 {
-	struct request_sock_queue *queue =
-	    &inet_csk(sk)->icsk_accept_queue;
-
-	if (queue->fastopenq == NULL) {
-		queue->fastopenq = kzalloc(
-		    sizeof(struct fastopen_queue),
-		    sk->sk_allocation);
-		if (queue->fastopenq == NULL)
-			return -ENOMEM;
-
-		sk->sk_destruct = tcp_sock_destruct;
-		spin_lock_init(&queue->fastopenq->lock);
-	}
-	queue->fastopenq->max_qlen = backlog;
-	return 0;
+	tp->saved_syn = req->saved_syn;
+	req->saved_syn = NULL;
 }
 
 static inline void tcp_saved_syn_free(struct tcp_sock *tp)
-- 
cgit v1.2.3-54-g00ecf