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[TCP] TCP YEAH: Use vegas dont copy it.

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Rather than using a copy of vegas code, the YEAH code should just have
it exported so there is common code.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger
2007-04-23 22:28:23 -07:00
committed by David S. Miller
parent 164891aadf
commit 7752237e9f
4 changed files with 61 additions and 178 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
net/ipv4/tcp_vegas.c
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@@ -38,6 +38,8 @@
#include <net/tcp.h>
#include "tcp_vegas.h"
/* Default values of the Vegas variables, in fixed-point representation
* with V_PARAM_SHIFT bits to the right of the binary point.
*/
@@ -54,17 +56,6 @@ module_param(gamma, int, 0644);
MODULE_PARM_DESC(gamma, "limit on increase (scale by 2)");
/* Vegas variables */
struct vegas {
u32 beg_snd_nxt; /* right edge during last RTT */
u32 beg_snd_una; /* left edge during last RTT */
u32 beg_snd_cwnd; /* saves the size of the cwnd */
u8 doing_vegas_now;/* if true, do vegas for this RTT */
u16 cntRTT; /* # of RTTs measured within last RTT */
u32 minRTT; /* min of RTTs measured within last RTT (in usec) */
u32 baseRTT; /* the min of all Vegas RTT measurements seen (in usec) */
};
/* There are several situations when we must "re-start" Vegas:
*
* o when a connection is established
@@ -81,7 +72,7 @@ struct vegas {
* Instead we must wait until the completion of an RTT during
* which we actually receive ACKs.
*/
static inline void vegas_enable(struct sock *sk)
static void vegas_enable(struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
struct vegas *vegas = inet_csk_ca(sk);
@@ -104,13 +95,14 @@ static inline void vegas_disable(struct sock *sk)
vegas->doing_vegas_now = 0;
}
static void tcp_vegas_init(struct sock *sk)
void tcp_vegas_init(struct sock *sk)
{
struct vegas *vegas = inet_csk_ca(sk);
vegas->baseRTT = 0x7fffffff;
vegas_enable(sk);
}
EXPORT_SYMBOL_GPL(tcp_vegas_init);
/* Do RTT sampling needed for Vegas.
* Basically we:
@@ -120,7 +112,7 @@ static void tcp_vegas_init(struct sock *sk)
* o min-filter RTT samples from a much longer window (forever for now)
* to find the propagation delay (baseRTT)
*/
static void tcp_vegas_pkts_acked(struct sock *sk, u32 cnt, ktime_t last)
void tcp_vegas_pkts_acked(struct sock *sk, u32 cnt, ktime_t last)
{
struct vegas *vegas = inet_csk_ca(sk);
u32 vrtt;
@@ -138,8 +130,9 @@ static void tcp_vegas_pkts_acked(struct sock *sk, u32 cnt, ktime_t last)
vegas->minRTT = min(vegas->minRTT, vrtt);
vegas->cntRTT++;
}
EXPORT_SYMBOL_GPL(tcp_vegas_pkts_acked);
static void tcp_vegas_state(struct sock *sk, u8 ca_state)
void tcp_vegas_state(struct sock *sk, u8 ca_state)
{
if (ca_state == TCP_CA_Open)
@@ -147,6 +140,7 @@ static void tcp_vegas_state(struct sock *sk, u8 ca_state)
else
vegas_disable(sk);
}
EXPORT_SYMBOL_GPL(tcp_vegas_state);
/*
* If the connection is idle and we are restarting,
@@ -157,12 +151,13 @@ static void tcp_vegas_state(struct sock *sk, u8 ca_state)
* packets, _then_ we can make Vegas calculations
* again.
*/
static void tcp_vegas_cwnd_event(struct sock *sk, enum tcp_ca_event event)
void tcp_vegas_cwnd_event(struct sock *sk, enum tcp_ca_event event)
{
if (event == CA_EVENT_CWND_RESTART ||
event == CA_EVENT_TX_START)
tcp_vegas_init(sk);
}
EXPORT_SYMBOL_GPL(tcp_vegas_cwnd_event);
static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack,
u32 seq_rtt, u32 in_flight, int flag)
@@ -339,8 +334,7 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack,
}
/* Extract info for Tcp socket info provided via netlink. */
static void tcp_vegas_get_info(struct sock *sk, u32 ext,
struct sk_buff *skb)
void tcp_vegas_get_info(struct sock *sk, u32 ext, struct sk_buff *skb)
{
const struct vegas *ca = inet_csk_ca(sk);
if (ext & (1 << (INET_DIAG_VEGASINFO - 1))) {
@@ -354,6 +348,7 @@ static void tcp_vegas_get_info(struct sock *sk, u32 ext,
nla_put(skb, INET_DIAG_VEGASINFO, sizeof(info), &info);
}
}
EXPORT_SYMBOL_GPL(tcp_vegas_get_info);
static struct tcp_congestion_ops tcp_vegas = {
.flags = TCP_CONG_RTT_STAMP,