2007/9/20, Tommi Saviranta <wnd@xxxxxx>:
> Signed-off-by: Tommi Saviranta <wnd@xxxxxx>
>
> ---
> diff -Nrup a/net/dccp/ccids/ccid4.c b/net/dccp/ccids/ccid4.c
> --- a/net/dccp/ccids/ccid4.c 2007-09-20 13:32:42.000000000 +0300
> +++ b/net/dccp/ccids/ccid4.c 2007-09-20 14:02:59.000000000 +0300
> @@ -44,6 +44,12 @@ static int ccid4_debug;
> #define ccid4_pr_debug(format, a...)
> #endif
>
> +/*
> + * The header size on data packets is estimated as 36 bytes [RFC XXXX,
> + * Section 5] (floyd-01)
> + */
> +#define CCID4HCTX_H 36
> +
> DECLARE_TFRC_TX_CACHE(ccid4_tx_hist);
>
> /*
> @@ -121,6 +127,17 @@ static u32 ccid4_hc_tx_idle_rtt(struct c
> }
>
> /**
> + * ccid4_hc_tx_x_header_penalty - Update allower sending rate X
> + * @hctx: half-connection to adjust
> + * This function adjusts sending rate according to [TFRC-SP, Section 5]
> + */
> +static inline void ccid4_hc_tx_x_header_penalty(struct ccid4_hc_tx_sock *hctx)
> +{
> + hctx->ccid4hctx_x *= hctx->ccid4hctx_s;
> + do_div(hctx->ccid4hctx_x, (hctx->ccid4hctx_s + CCID4HCTX_H));
> +}
> +
> +/**
> * ccid4_hc_tx_update_x - Update allowed sending rate X
> * @stamp: most recent time if available - can be left NULL.
> * This function tracks draft rfc3448bis, check there for latest details.
> @@ -156,6 +173,7 @@ static void ccid4_hc_tx_update_x(struct
> hctx->ccid4hctx_x = max(hctx->ccid4hctx_x,
> (((__u64)hctx->ccid4hctx_s) << 6) /
> TFRC_T_MBI);
> + ccid4_hc_tx_x_header_penalty(hctx);
>
> } else if (ktime_us_delta(now, hctx->ccid4hctx_t_ld)
> - (s64)hctx->ccid4hctx_rtt >= 0) {
> @@ -164,6 +182,7 @@ static void ccid4_hc_tx_update_x(struct
> max(min(2 * hctx->ccid4hctx_x, min_rate),
> scaled_div(((__u64)hctx->ccid4hctx_s) << 6,
> hctx->ccid4hctx_rtt));
> + ccid4_hc_tx_x_header_penalty(hctx);
> hctx->ccid4hctx_t_ld = now;
> }
> -
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>
Acked-by: Leandro Sales <leandro@xxxxxxxxxxxxxxxxxxxx>
-
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