[DCCP]: Make ccid3_hc_tx_update_x get a timestamp if needed
The code was too complicated, if p > 0 in ccid3_hc_tx_no_feedback_timer the timestamp was being obtained to be passed to ccid3_hc_tx_update_x, where only if p > 0 the timestamp was needed, so just leave it to ccid3_hc_tx_update_x to obtain the timestamp if needed. This will help in the upcoming changesets where we'll convert t_ld to ktime_t. We'll eventually try to reuse ktime_get_real() calls again. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -128,7 +128,7 @@ static inline void ccid3_update_send_interval(struct ccid3_hc_tx_sock *hctx)
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* throughout the code. Only X_calc is unscaled (in bytes/second).
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*
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*/
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static void ccid3_hc_tx_update_x(struct sock *sk, struct timeval *now)
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static void ccid3_hc_tx_update_x(struct sock *sk)
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{
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struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
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@ -153,14 +153,20 @@ static void ccid3_hc_tx_update_x(struct sock *sk, struct timeval *now)
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(((__u64)hctx->ccid3hctx_s) << 6) /
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TFRC_T_MBI);
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} else if (timeval_delta(now, &hctx->ccid3hctx_t_ld) -
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(suseconds_t)hctx->ccid3hctx_rtt >= 0) {
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} else {
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struct timeval now;
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hctx->ccid3hctx_x =
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max(min(2 * hctx->ccid3hctx_x, min_rate),
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scaled_div(((__u64)hctx->ccid3hctx_s) << 6,
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hctx->ccid3hctx_rtt));
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hctx->ccid3hctx_t_ld = *now;
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dccp_timestamp(sk, &now);
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if ((timeval_delta(&now, &hctx->ccid3hctx_t_ld) -
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(suseconds_t)hctx->ccid3hctx_rtt) >= 0) {
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hctx->ccid3hctx_x =
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max(min(2 * hctx->ccid3hctx_x, min_rate),
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scaled_div(((__u64)hctx->ccid3hctx_s) << 6,
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hctx->ccid3hctx_rtt));
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hctx->ccid3hctx_t_ld = now;
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}
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}
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if (hctx->ccid3hctx_x != old_x) {
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@ -214,7 +220,6 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
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{
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struct sock *sk = (struct sock *)data;
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struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
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struct timeval now;
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unsigned long t_nfb = USEC_PER_SEC / 5;
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bh_lock_sock(sk);
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@ -265,15 +270,12 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
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max(hctx->ccid3hctx_x_recv / 2,
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(((__u64)hctx->ccid3hctx_s) << 6) /
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(2 * TFRC_T_MBI));
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if (hctx->ccid3hctx_p == 0)
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dccp_timestamp(sk, &now);
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} else {
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hctx->ccid3hctx_x_recv = hctx->ccid3hctx_x_calc;
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hctx->ccid3hctx_x_recv <<= 4;
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}
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/* Now recalculate X [RFC 3448, 4.3, step (4)] */
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ccid3_hc_tx_update_x(sk, &now);
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ccid3_hc_tx_update_x(sk);
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/*
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* Schedule no feedback timer to expire in
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* max(t_RTO, 2 * s/X) = max(t_RTO, 2 * t_ipi)
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@ -496,7 +498,7 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
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tfrc_calc_x(hctx->ccid3hctx_s,
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hctx->ccid3hctx_rtt,
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hctx->ccid3hctx_p);
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ccid3_hc_tx_update_x(sk, &now);
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ccid3_hc_tx_update_x(sk);
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ccid3_pr_debug("%s(%p), RTT=%uus (sample=%uus), s=%u, "
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"p=%u, X_calc=%u, X_recv=%u, X=%u\n",
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