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[CCID3]: Sending time: update to ktime_t

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This updates the computation of t_nom and t_last_win_count to use the newer
gettimeofday interface.

Committer note: used ktime_to_timeval to set the 'now' variable to t_ld in
                ccid3hctx_no_feedback_timer

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
This commit is contained in:
Gerrit Renker 2007-06-16 13:34:02 -03:00 committed by David S. Miller
parent 1e180f726a
commit 8132da4d41
2 changed files with 16 additions and 22 deletions
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33
net/dccp/ccids/ccid3.c
View File

@ -193,25 +193,20 @@ static inline void ccid3_hc_tx_update_s(struct ccid3_hc_tx_sock *hctx, int len)
* The algorithm is not applicable if RTT < 4 microseconds.
*/
static inline void ccid3_hc_tx_update_win_count(struct ccid3_hc_tx_sock *hctx,
struct timeval *now)
ktime_t now)
{
suseconds_t delta;
u32 quarter_rtts;
if (unlikely(hctx->ccid3hctx_rtt < 4)) /* avoid divide-by-zero */
return;
delta = timeval_delta(now, &hctx->ccid3hctx_t_last_win_count);
DCCP_BUG_ON(delta < 0);
quarter_rtts = (u32)delta / (hctx->ccid3hctx_rtt / 4);
quarter_rtts = ktime_us_delta(now, hctx->ccid3hctx_t_last_win_count);
quarter_rtts /= hctx->ccid3hctx_rtt / 4;
if (quarter_rtts > 0) {
hctx->ccid3hctx_t_last_win_count = *now;
hctx->ccid3hctx_t_last_win_count = now;
hctx->ccid3hctx_last_win_count += min_t(u32, quarter_rtts, 5);
hctx->ccid3hctx_last_win_count &= 0xF; /* mod 16 */
ccid3_pr_debug("now at %#X\n", hctx->ccid3hctx_last_win_count);
}
}
@ -311,8 +306,8 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
struct timeval now;
suseconds_t delay;
ktime_t now = ktime_get_real();
s64 delay;
BUG_ON(hctx == NULL);
@ -324,8 +319,6 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
if (unlikely(skb->len == 0))
return -EBADMSG;
dccp_timestamp(sk, &now);
switch (hctx->ccid3hctx_state) {
case TFRC_SSTATE_NO_SENT:
sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer,
@ -348,7 +341,7 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
ccid3_pr_debug("SYN RTT = %uus\n", dp->dccps_syn_rtt);
hctx->ccid3hctx_rtt = dp->dccps_syn_rtt;
hctx->ccid3hctx_x = rfc3390_initial_rate(sk);
hctx->ccid3hctx_t_ld = now;
hctx->ccid3hctx_t_ld = ktime_to_timeval(now);
} else {
/* Sender does not have RTT sample: X = MSS/second */
hctx->ccid3hctx_x = dp->dccps_mss_cache;
@ -360,7 +353,7 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
break;
case TFRC_SSTATE_NO_FBACK:
case TFRC_SSTATE_FBACK:
delay = timeval_delta(&hctx->ccid3hctx_t_nom, &now);
delay = ktime_us_delta(hctx->ccid3hctx_t_nom, now);
ccid3_pr_debug("delay=%ld\n", (long)delay);
/*
* Scheduling of packet transmissions [RFC 3448, 4.6]
@ -370,10 +363,10 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
* else
* // send the packet in (t_nom - t_now) milliseconds.
*/
if (delay - (suseconds_t)hctx->ccid3hctx_delta >= 0)
return delay / 1000L;
if (delay - (s64)hctx->ccid3hctx_delta >= 0)
return (u32)delay / 1000L;
ccid3_hc_tx_update_win_count(hctx, &now);
ccid3_hc_tx_update_win_count(hctx, now);
break;
case TFRC_SSTATE_TERM:
DCCP_BUG("%s(%p) - Illegal state TERM", dccp_role(sk), sk);
@ -386,8 +379,8 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
hctx->ccid3hctx_idle = 0;
/* set the nominal send time for the next following packet */
timeval_add_usecs(&hctx->ccid3hctx_t_nom, hctx->ccid3hctx_t_ipi);
hctx->ccid3hctx_t_nom = ktime_add_us(hctx->ccid3hctx_t_nom,
hctx->ccid3hctx_t_ipi);
return 0;
}

5
net/dccp/ccids/ccid3.h
View File

@ -36,6 +36,7 @@
#ifndef _DCCP_CCID3_H_
#define _DCCP_CCID3_H_
#include <linux/ktime.h>
#include <linux/list.h>
#include <linux/time.h>
#include <linux/types.h>
@ -108,10 +109,10 @@ struct ccid3_hc_tx_sock {
enum ccid3_hc_tx_states ccid3hctx_state:8;
u8 ccid3hctx_last_win_count;
u8 ccid3hctx_idle;
struct timeval ccid3hctx_t_last_win_count;
ktime_t ccid3hctx_t_last_win_count;
struct timer_list ccid3hctx_no_feedback_timer;
struct timeval ccid3hctx_t_ld;
struct timeval ccid3hctx_t_nom;
ktime_t ccid3hctx_t_nom;
u32 ccid3hctx_delta;
struct list_head ccid3hctx_hist;
struct ccid3_options_received ccid3hctx_options_received;