tcp: remove CA_ACK_SLOWPATH
re-indent tcp_ack, and remove CA_ACK_SLOWPATH; it is always set now. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
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45f119bf93
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573aeb0492
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@ -880,9 +880,8 @@ enum tcp_ca_event {
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/* Information about inbound ACK, passed to cong_ops->in_ack_event() */
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enum tcp_ca_ack_event_flags {
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CA_ACK_SLOWPATH = (1 << 0), /* In slow path processing */
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CA_ACK_WIN_UPDATE = (1 << 1), /* ACK updated window */
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CA_ACK_ECE = (1 << 2), /* ECE bit is set on ack */
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CA_ACK_WIN_UPDATE = (1 << 0), /* ACK updated window */
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CA_ACK_ECE = (1 << 1), /* ECE bit is set on ack */
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};
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/*
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@ -3547,6 +3547,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag)
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u32 lost = tp->lost;
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int acked = 0; /* Number of packets newly acked */
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int rexmit = REXMIT_NONE; /* Flag to (re)transmit to recover losses */
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u32 ack_ev_flags = 0;
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sack_state.first_sackt = 0;
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sack_state.rate = &rs;
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@ -3590,31 +3591,27 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag)
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if (flag & FLAG_UPDATE_TS_RECENT)
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tcp_replace_ts_recent(tp, TCP_SKB_CB(skb)->seq);
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{
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u32 ack_ev_flags = CA_ACK_SLOWPATH;
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if (ack_seq != TCP_SKB_CB(skb)->end_seq)
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flag |= FLAG_DATA;
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else
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NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPPUREACKS);
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if (ack_seq != TCP_SKB_CB(skb)->end_seq)
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flag |= FLAG_DATA;
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else
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NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPPUREACKS);
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flag |= tcp_ack_update_window(sk, skb, ack, ack_seq);
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flag |= tcp_ack_update_window(sk, skb, ack, ack_seq);
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if (TCP_SKB_CB(skb)->sacked)
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flag |= tcp_sacktag_write_queue(sk, skb, prior_snd_una,
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&sack_state);
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if (TCP_SKB_CB(skb)->sacked)
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flag |= tcp_sacktag_write_queue(sk, skb, prior_snd_una,
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&sack_state);
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if (tcp_ecn_rcv_ecn_echo(tp, tcp_hdr(skb))) {
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flag |= FLAG_ECE;
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ack_ev_flags |= CA_ACK_ECE;
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}
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if (flag & FLAG_WIN_UPDATE)
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ack_ev_flags |= CA_ACK_WIN_UPDATE;
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tcp_in_ack_event(sk, ack_ev_flags);
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if (tcp_ecn_rcv_ecn_echo(tp, tcp_hdr(skb))) {
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flag |= FLAG_ECE;
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ack_ev_flags = CA_ACK_ECE;
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}
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if (flag & FLAG_WIN_UPDATE)
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ack_ev_flags |= CA_ACK_WIN_UPDATE;
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tcp_in_ack_event(sk, ack_ev_flags);
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/* We passed data and got it acked, remove any soft error
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* log. Something worked...
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*/
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@ -153,24 +153,6 @@ static inline void update_rtt_min(struct westwood *w)
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w->rtt_min = min(w->rtt, w->rtt_min);
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}
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/*
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* @westwood_fast_bw
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* It is called when we are in fast path. In particular it is called when
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* header prediction is successful. In such case in fact update is
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* straight forward and doesn't need any particular care.
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*/
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static inline void westwood_fast_bw(struct sock *sk)
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{
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const struct tcp_sock *tp = tcp_sk(sk);
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struct westwood *w = inet_csk_ca(sk);
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westwood_update_window(sk);
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w->bk += tp->snd_una - w->snd_una;
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w->snd_una = tp->snd_una;
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update_rtt_min(w);
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}
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/*
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* @westwood_acked_count
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* This function evaluates cumul_ack for evaluating bk in case of
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@ -223,17 +205,12 @@ static u32 tcp_westwood_bw_rttmin(const struct sock *sk)
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static void tcp_westwood_ack(struct sock *sk, u32 ack_flags)
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{
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if (ack_flags & CA_ACK_SLOWPATH) {
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struct westwood *w = inet_csk_ca(sk);
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struct westwood *w = inet_csk_ca(sk);
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westwood_update_window(sk);
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w->bk += westwood_acked_count(sk);
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westwood_update_window(sk);
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w->bk += westwood_acked_count(sk);
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update_rtt_min(w);
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return;
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}
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westwood_fast_bw(sk);
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update_rtt_min(w);
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}
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static void tcp_westwood_event(struct sock *sk, enum tcp_ca_event event)
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