WLAN subsystem: Sysctl support for key TCP/IP parameters
It has been observed that default values for some of key tcp/ip
parameters are affecting the tput/performance of the system. Hence
extending configuration capabilities to TCP/Ip stack through
sysctl interface.
Change-Id: I0c99d5b50cbe0d6496e40d391eacc12b0c62dbed
CRs-Fixed: 507581
Signed-off-by: Mahesh A Saptasagar <msapta@codeaurora.org>
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 34d4a02..750926d 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -36,6 +36,36 @@
static void tcp_delack_timer(unsigned long);
static void tcp_keepalive_timer (unsigned long data);
+/*Function to reset tcp_ack related sysctl on resetting master control */
+void set_tcp_default(void)
+{
+ sysctl_tcp_delack_seg = TCP_DELACK_SEG;
+}
+
+/*sysctl handler for tcp_ack realted master control */
+int tcp_proc_delayed_ack_control(ctl_table *table, int write,
+ void __user *buffer, size_t *length, loff_t *ppos)
+{
+ int ret = proc_dointvec_minmax(table, write, buffer, length, ppos);
+ /* The ret value will be 0 if the input validation is successful
+ * and the values are written to sysctl table. If not, the stack
+ * will continue to work with currently configured values
+ */
+ return ret;
+}
+
+/*sysctl handler for tcp_ack realted master control */
+int tcp_use_userconfig_sysctl_handler(ctl_table *table, int write,
+ void __user *buffer, size_t *length, loff_t *ppos)
+{
+ int ret = proc_dointvec_minmax(table, write, buffer, length, ppos);
+ if (write && ret == 0) {
+ if (!sysctl_tcp_use_userconfig)
+ set_tcp_default();
+ }
+ return ret;
+}
+
void tcp_init_xmit_timers(struct sock *sk)
{
inet_csk_init_xmit_timers(sk, &tcp_write_timer, &tcp_delack_timer,