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[TCP]: Add pluggable congestion control algorithm infrastructure.

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Allow TCP to have multiple pluggable congestion control algorithms.
Algorithms are defined by a set of operations and can be built in
or modules.  The legacy "new RENO" algorithm is used as a starting
point and fallback.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2005-06-23 12:19:55 -07:00 • committed by David S. Miller
parent a8ad86f2dc
commit 317a76f9a4
13 changed files with 399 additions and 999 deletions
Download patch file Download diff file Expand all files Collapse all files

114
net/ipv4/sysctl_net_ipv4.c
View file

@ -118,6 +118,45 @@ static int ipv4_sysctl_forward_strategy(ctl_table *table,
return 1;
}
static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file * filp,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
char val[TCP_CA_NAME_MAX];
ctl_table tbl = {
.data = val,
.maxlen = TCP_CA_NAME_MAX,
};
int ret;
tcp_get_default_congestion_control(val);
ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
if (write && ret == 0)
ret = tcp_set_default_congestion_control(val);
return ret;
}
int sysctl_tcp_congestion_control(ctl_table *table, int __user *name, int nlen,
void __user *oldval, size_t __user *oldlenp,
void __user *newval, size_t newlen,
void **context)
{
char val[TCP_CA_NAME_MAX];
ctl_table tbl = {
.data = val,
.maxlen = TCP_CA_NAME_MAX,
};
int ret;
tcp_get_default_congestion_control(val);
ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen,
context);
if (ret == 0 && newval && newlen)
ret = tcp_set_default_congestion_control(val);
return ret;
}
ctl_table ipv4_table[] = {
{
.ctl_name = NET_IPV4_TCP_TIMESTAMPS,
@ -611,70 +650,6 @@ ctl_table ipv4_table[] = {
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_WESTWOOD,
.procname = "tcp_westwood",
.data = &sysctl_tcp_westwood,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_VEGAS,
.procname = "tcp_vegas_cong_avoid",
.data = &sysctl_tcp_vegas_cong_avoid,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_VEGAS_ALPHA,
.procname = "tcp_vegas_alpha",
.data = &sysctl_tcp_vegas_alpha,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_VEGAS_BETA,
.procname = "tcp_vegas_beta",
.data = &sysctl_tcp_vegas_beta,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_VEGAS_GAMMA,
.procname = "tcp_vegas_gamma",
.data = &sysctl_tcp_vegas_gamma,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_BIC,
.procname = "tcp_bic",
.data = &sysctl_tcp_bic,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_BIC_FAST_CONVERGENCE,
.procname = "tcp_bic_fast_convergence",
.data = &sysctl_tcp_bic_fast_convergence,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_BIC_LOW_WINDOW,
.procname = "tcp_bic_low_window",
.data = &sysctl_tcp_bic_low_window,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_MODERATE_RCVBUF,
.procname = "tcp_moderate_rcvbuf",
@ -692,13 +667,14 @@ ctl_table ipv4_table[] = {
.proc_handler = &proc_dointvec,
},
{
.ctl_name = NET_TCP_BIC_BETA,
.procname = "tcp_bic_beta",
.data = &sysctl_tcp_bic_beta,
.maxlen = sizeof(int),
.ctl_name = NET_TCP_CONG_CONTROL,
.procname = "tcp_congestion_control",
.mode = 0644,
.proc_handler = &proc_dointvec,
.maxlen = TCP_CA_NAME_MAX,
.proc_handler = &proc_tcp_congestion_control,
.strategy = &sysctl_tcp_congestion_control,
},
{ .ctl_name = 0 }
};