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[TCP]: Add tcp_available_congestion_control sysctl.

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Create /proc/sys/net/ipv4/tcp_available_congestion_control
that reflects currently available TCP choices.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger
2006-11-09 16:32:06 -08:00
committed by David S. Miller
parent b68dbcab1d
commit 3ff825b28d
5 changed files with 51 additions and 0 deletions
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24
net/ipv4/sysctl_net_ipv4.c
View File

@@ -129,6 +129,23 @@ static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
return ret;
}
static int proc_tcp_available_congestion_control(ctl_table *ctl,
int write, struct file * filp,
void __user *buffer, size_t *lenp,
loff_t *ppos)
{
ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
int ret;
tbl.data = kmalloc(tbl.maxlen, GFP_USER);
if (!tbl.data)
return -ENOMEM;
tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
kfree(tbl.data);
return ret;
}
ctl_table ipv4_table[] = {
{
.ctl_name = NET_IPV4_TCP_TIMESTAMPS,
@@ -731,6 +748,13 @@ ctl_table ipv4_table[] = {
.proc_handler = &proc_dointvec,
},
#endif /* CONFIG_NETLABEL */
{
.ctl_name = NET_TCP_AVAIL_CONG_CONTROL,
.procname = "tcp_available_congestion_control",
.maxlen = TCP_CA_BUF_MAX,
.mode = 0444,
.proc_handler = &proc_tcp_available_congestion_control,
},
{ .ctl_name = 0 }
};