1 files changed, 46 insertions, 40 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index a4d1eb9a0926..6f0a7e30ceac 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -105,8 +105,9 @@ static __u16 tcp_advertise_mss(struct sock *sk)
 
 /* RFC2861. Reset CWND after idle period longer RTO to "restart window".
  * This is the first part of cwnd validation mechanism. */
-static void tcp_cwnd_restart(struct tcp_sock *tp, struct dst_entry *dst)
+static void tcp_cwnd_restart(struct sock *sk, struct dst_entry *dst)
 {
+        struct tcp_sock *tp = tcp_sk(sk);
         s32 delta = tcp_time_stamp - tp->lsndtime;
         u32 restart_cwnd = tcp_init_cwnd(tp, dst);
         u32 cwnd = tp->snd_cwnd;
@@ -116,7 +117,7 @@ static void tcp_cwnd_restart(struct tcp_sock *tp, struct dst_entry *dst)
         tp->snd_ssthresh = tcp_current_ssthresh(tp);
         restart_cwnd = min(restart_cwnd, cwnd);
 
-        while ((delta -= tp->rto) > 0 && cwnd > restart_cwnd)
+        while ((delta -= inet_csk(sk)->icsk_rto) > 0 && cwnd > restart_cwnd)
                 cwnd >>= 1;
         tp->snd_cwnd = max(cwnd, restart_cwnd);
         tp->snd_cwnd_stamp = tcp_time_stamp;
@@ -126,26 +127,25 @@ static void tcp_cwnd_restart(struct tcp_sock *tp, struct dst_entry *dst)
 static inline void tcp_event_data_sent(struct tcp_sock *tp,
                                        struct sk_buff *skb, struct sock *sk)
 {
-        u32 now = tcp_time_stamp;
+        struct inet_connection_sock *icsk = inet_csk(sk);
+        const u32 now = tcp_time_stamp;
 
-        if (!tp->packets_out && (s32)(now - tp->lsndtime) > tp->rto)
-                tcp_cwnd_restart(tp, __sk_dst_get(sk));
+        if (!tp->packets_out && (s32)(now - tp->lsndtime) > icsk->icsk_rto)
+                tcp_cwnd_restart(sk, __sk_dst_get(sk));
 
         tp->lsndtime = now;
 
         /* If it is a reply for ato after last received
          * packet, enter pingpong mode.
          */
-        if ((u32)(now - tp->ack.lrcvtime) < tp->ack.ato)
-                tp->ack.pingpong = 1;
+        if ((u32)(now - icsk->icsk_ack.lrcvtime) < icsk->icsk_ack.ato)
+                icsk->icsk_ack.pingpong = 1;
 }
 
 static __inline__ void tcp_event_ack_sent(struct sock *sk, unsigned int pkts)
 {
-        struct tcp_sock *tp = tcp_sk(sk);
-
-        tcp_dec_quickack_mode(tp, pkts);
-        tcp_clear_xmit_timer(sk, TCP_TIME_DACK);
+        tcp_dec_quickack_mode(sk, pkts);
+        inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
 }
 
 /* Determine a window scaling and initial window to offer.
@@ -696,7 +696,7 @@ static inline void tcp_cwnd_validate(struct sock *sk, struct tcp_sock *tp)
                 if (tp->packets_out > tp->snd_cwnd_used)
                         tp->snd_cwnd_used = tp->packets_out;
 
-                if ((s32)(tcp_time_stamp - tp->snd_cwnd_stamp) >= tp->rto)
+                if ((s32)(tcp_time_stamp - tp->snd_cwnd_stamp) >= inet_csk(sk)->icsk_rto)
                         tcp_cwnd_application_limited(sk);
         }
 }
@@ -1147,6 +1147,7 @@ void tcp_push_one(struct sock *sk, unsigned int mss_now)
  */
 u32 __tcp_select_window(struct sock *sk)
 {
+        struct inet_connection_sock *icsk = inet_csk(sk);
         struct tcp_sock *tp = tcp_sk(sk);
         /* MSS for the peer's data.  Previous verions used mss_clamp
          * here.  I don't know if the value based on our guesses
@@ -1154,7 +1155,7 @@ u32 __tcp_select_window(struct sock *sk)
          * but may be worse for the performance because of rcv_mss
          * fluctuations.  --SAW  1998/11/1
          */
-        int mss = tp->ack.rcv_mss;
+        int mss = icsk->icsk_ack.rcv_mss;
         int free_space = tcp_space(sk);
         int full_space = min_t(int, tp->window_clamp, tcp_full_space(sk));
         int window;
@@ -1163,7 +1164,7 @@ u32 __tcp_select_window(struct sock *sk)
                 mss = full_space; 
 
         if (free_space < full_space/2) {
-                tp->ack.quick = 0;
+                icsk->icsk_ack.quick = 0;
 
                 if (tcp_memory_pressure)
                         tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U*tp->advmss);
@@ -1491,7 +1492,8 @@ void tcp_xmit_retransmit_queue(struct sock *sk)
 
                                         if (skb ==
                                             skb_peek(&sk->sk_write_queue))
-                                                tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+                                                inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+                                                                          inet_csk(sk)->icsk_rto);
                                 }
 
                                 packet_cnt -= tcp_skb_pcount(skb);
@@ -1544,7 +1546,7 @@ void tcp_xmit_retransmit_queue(struct sock *sk)
                         break;
 
                 if (skb == skb_peek(&sk->sk_write_queue))
-                        tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+                        inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, inet_csk(sk)->icsk_rto);
 
                 NET_INC_STATS_BH(LINUX_MIB_TCPFORWARDRETRANS);
         }
@@ -1780,8 +1782,8 @@ static inline void tcp_connect_init(struct sock *sk)
         tp->rcv_wup = 0;
         tp->copied_seq = 0;
 
-        tp->rto = TCP_TIMEOUT_INIT;
-        tp->retransmits = 0;
+        inet_csk(sk)->icsk_rto = TCP_TIMEOUT_INIT;
+        inet_csk(sk)->icsk_retransmits = 0;
         tcp_clear_retrans(tp);
 }
 
@@ -1824,7 +1826,7 @@ int tcp_connect(struct sock *sk)
         TCP_INC_STATS(TCP_MIB_ACTIVEOPENS);
 
         /* Timer for repeating the SYN until an answer. */
-        tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+        inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, inet_csk(sk)->icsk_rto);
         return 0;
 }
 
@@ -1834,20 +1836,21 @@ int tcp_connect(struct sock *sk)
  */
 void tcp_send_delayed_ack(struct sock *sk)
 {
-        struct tcp_sock *tp = tcp_sk(sk);
-        int ato = tp->ack.ato;
+        struct inet_connection_sock *icsk = inet_csk(sk);
+        int ato = icsk->icsk_ack.ato;
         unsigned long timeout;
 
         if (ato > TCP_DELACK_MIN) {
+                const struct tcp_sock *tp = tcp_sk(sk);
                 int max_ato = HZ/2;
 
-                if (tp->ack.pingpong || (tp->ack.pending&TCP_ACK_PUSHED))
+                if (icsk->icsk_ack.pingpong || (icsk->icsk_ack.pending & ICSK_ACK_PUSHED))
                         max_ato = TCP_DELACK_MAX;
 
                 /* Slow path, intersegment interval is "high". */
 
                 /* If some rtt estimate is known, use it to bound delayed ack.
-                 * Do not use tp->rto here, use results of rtt measurements
+                 * Do not use inet_csk(sk)->icsk_rto here, use results of rtt measurements
                  * directly.
                  */
                 if (tp->srtt) {
@@ -1864,21 +1867,22 @@ void tcp_send_delayed_ack(struct sock *sk)
         timeout = jiffies + ato;
 
         /* Use new timeout only if there wasn't a older one earlier. */
-        if (tp->ack.pending&TCP_ACK_TIMER) {
+        if (icsk->icsk_ack.pending & ICSK_ACK_TIMER) {
                 /* If delack timer was blocked or is about to expire,
                  * send ACK now.
                  */
-                if (tp->ack.blocked || time_before_eq(tp->ack.timeout, jiffies+(ato>>2))) {
+                if (icsk->icsk_ack.blocked ||
+                    time_before_eq(icsk->icsk_ack.timeout, jiffies + (ato >> 2))) {
                         tcp_send_ack(sk);
                         return;
                 }
 
-                if (!time_before(timeout, tp->ack.timeout))
-                        timeout = tp->ack.timeout;
+                if (!time_before(timeout, icsk->icsk_ack.timeout))
+                        timeout = icsk->icsk_ack.timeout;
         }
-        tp->ack.pending |= TCP_ACK_SCHED|TCP_ACK_TIMER;
-        tp->ack.timeout = timeout;
-        sk_reset_timer(sk, &tp->delack_timer, timeout);
+        icsk->icsk_ack.pending |= ICSK_ACK_SCHED | ICSK_ACK_TIMER;
+        icsk->icsk_ack.timeout = timeout;
+        sk_reset_timer(sk, &icsk->icsk_delack_timer, timeout);
 }
 
 /* This routine sends an ack and also updates the window. */
@@ -1895,9 +1899,9 @@ void tcp_send_ack(struct sock *sk)
                  */
                 buff = alloc_skb(MAX_TCP_HEADER, GFP_ATOMIC);
                 if (buff == NULL) {
-                        tcp_schedule_ack(tp);
-                        tp->ack.ato = TCP_ATO_MIN;
-                        tcp_reset_xmit_timer(sk, TCP_TIME_DACK, TCP_DELACK_MAX);
+                        inet_csk_schedule_ack(sk);
+                        inet_csk(sk)->icsk_ack.ato = TCP_ATO_MIN;
+                        inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK, TCP_DELACK_MAX);
                         return;
                 }
 
@@ -2011,6 +2015,7 @@ int tcp_write_wakeup(struct sock *sk)
  */
 void tcp_send_probe0(struct sock *sk)
 {
+        struct inet_connection_sock *icsk = inet_csk(sk);
         struct tcp_sock *tp = tcp_sk(sk);
         int err;
 
@@ -2019,16 +2024,16 @@ void tcp_send_probe0(struct sock *sk)
         if (tp->packets_out || !sk->sk_send_head) {
                 /* Cancel probe timer, if it is not required. */
                 tp->probes_out = 0;
-                tp->backoff = 0;
+                icsk->icsk_backoff = 0;
                 return;
         }
 
         if (err <= 0) {
-                if (tp->backoff < sysctl_tcp_retries2)
-                        tp->backoff++;
+                if (icsk->icsk_backoff < sysctl_tcp_retries2)
+                        icsk->icsk_backoff++;
                 tp->probes_out++;
-                tcp_reset_xmit_timer (sk, TCP_TIME_PROBE0, 
-                                      min(tp->rto << tp->backoff, TCP_RTO_MAX));
+                inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0, 
+                                          min(icsk->icsk_rto << icsk->icsk_backoff, TCP_RTO_MAX));
         } else {
                 /* If packet was not sent due to local congestion,
                  * do not backoff and do not remember probes_out.
@@ -2038,8 +2043,9 @@ void tcp_send_probe0(struct sock *sk)
                  */
                 if (!tp->probes_out)
                         tp->probes_out=1;
-                tcp_reset_xmit_timer (sk, TCP_TIME_PROBE0, 
-                                      min(tp->rto << tp->backoff, TCP_RESOURCE_PROBE_INTERVAL));
+                inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0, 
+                                          min(icsk->icsk_rto << icsk->icsk_backoff,
+                                              TCP_RESOURCE_PROBE_INTERVAL));
         }
 }