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authorStephen Hemminger <shemminger@osdl.org>2006-11-10 03:32:06 +0300
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-03 08:21:48 +0300
commit3ff825b28d3345ef381eceae22bf9d92231f23dc (patch)
treec3ca6ec1888ff912e0434f6621ecb2e46e8826f3 /net/ipv4/tcp_cong.c
parentb68dbcab1dc70938fa5516d0ee82c0bf94e9a768 (diff)
downloadlinux-3ff825b28d3345ef381eceae22bf9d92231f23dc.tar.xz
[TCP]: Add tcp_available_congestion_control sysctl.
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>
Diffstat (limited to 'net/ipv4/tcp_cong.c')
-rw-r--r--net/ipv4/tcp_cong.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c
index 1e2982f4acd4..d846d7b95e1f 100644
--- a/net/ipv4/tcp_cong.c
+++ b/net/ipv4/tcp_cong.c
@@ -139,6 +139,22 @@ static int __init tcp_congestion_default(void)
late_initcall(tcp_congestion_default);
+/* Build string with list of available congestion control values */
+void tcp_get_available_congestion_control(char *buf, size_t maxlen)
+{
+ struct tcp_congestion_ops *ca;
+ size_t offs = 0;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(ca, &tcp_cong_list, list) {
+ offs += snprintf(buf + offs, maxlen - offs,
+ "%s%s",
+ offs == 0 ? "" : " ", ca->name);
+
+ }
+ rcu_read_unlock();
+}
+
/* Get current default congestion control */
void tcp_get_default_congestion_control(char *name)
{