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authorStephen Hemminger <shemminger@osdl.org>2005-06-23 12:19:55 -0700
committerDavid S. Miller <davem@davemloft.net>2005-06-23 12:19:55 -0700
commit317a76f9a44b437d6301718f4e5d08bd93f98da7 (patch)
treecaeba9839dee264f59b035b81c3d13d6c61b638e /net/ipv4/sysctl_net_ipv4.c
parenta8ad86f2dc46356f87be1327dabc18bdbda32f50 (diff)
[TCP]: Add pluggable congestion control algorithm infrastructure.
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>
Diffstat (limited to 'net/ipv4/sysctl_net_ipv4.c')
-rw-r--r--net/ipv4/sysctl_net_ipv4.c114
1 files changed, 45 insertions, 69 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 23068bddbf0b..e32894532416 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -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,
@@ -612,70 +651,6 @@ ctl_table ipv4_table[] = {
.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",
.data = &sysctl_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 }
};