[TCP]: Remove lost_retrans zero seqno special cases

[linux-2.6-omap-h63xx.git] / net / ipv4 / sysctl_net_ipv4.c

diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 0aa304711a96ee09b7a99a48f4a1c676b4ee86ec..c98ef16effd24171bf24dc580c6c633bab716ac7 100644 (file)
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -12,12 +12,14 @@
 #include <linux/sysctl.h>
 #include <linux/igmp.h>
 #include <linux/inetdevice.h>
+#include <linux/seqlock.h>
 #include <net/snmp.h>
 #include <net/icmp.h>
 #include <net/ip.h>
 #include <net/route.h>
 #include <net/tcp.h>
 #include <net/cipso_ipv4.h>
+#include <net/inet_frag.h>
 
 /* From af_inet.c */
 extern int sysctl_ip_nonlocal_bind;
@@ -37,12 +39,12 @@ static
 int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
                        void __user *buffer, size_t *lenp, loff_t *ppos)
 {
-       int val = ipv4_devconf.forwarding;
+       int val = IPV4_DEVCONF_ALL(FORWARDING);
        int ret;
 
        ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
 
-       if (write && ipv4_devconf.forwarding != val)
+       if (write && IPV4_DEVCONF_ALL(FORWARDING) != val)
                inet_forward_change();
 
        return ret;
@@ -89,6 +91,74 @@ static int ipv4_sysctl_forward_strategy(ctl_table *table,
        return 1;
 }
 
+extern seqlock_t sysctl_port_range_lock;
+extern int sysctl_local_port_range[2];
+
+/* Update system visible IP port range */
+static void set_local_port_range(int range[2])
+{
+       write_seqlock(&sysctl_port_range_lock);
+       sysctl_local_port_range[0] = range[0];
+       sysctl_local_port_range[1] = range[1];
+       write_sequnlock(&sysctl_port_range_lock);
+}
+
+/* Validate changes from /proc interface. */
+static int ipv4_local_port_range(ctl_table *table, int write, struct file *filp,
+                                void __user *buffer,
+                                size_t *lenp, loff_t *ppos)
+{
+       int ret;
+       int range[2] = { sysctl_local_port_range[0],
+                        sysctl_local_port_range[1] };
+       ctl_table tmp = {
+               .data = &range,
+               .maxlen = sizeof(range),
+               .mode = table->mode,
+               .extra1 = &ip_local_port_range_min,
+               .extra2 = &ip_local_port_range_max,
+       };
+
+       ret = proc_dointvec_minmax(&tmp, write, filp, buffer, lenp, ppos);
+
+       if (write && ret == 0) {
+               if (range[1] <= range[0])
+                       ret = -EINVAL;
+               else
+                       set_local_port_range(range);
+       }
+
+       return ret;
+}
+
+/* Validate changes from sysctl interface. */
+static int ipv4_sysctl_local_port_range(ctl_table *table, int __user *name,
+                                        int nlen, void __user *oldval,
+                                        size_t __user *oldlenp,
+                                       void __user *newval, size_t newlen)
+{
+       int ret;
+       int range[2] = { sysctl_local_port_range[0],
+                        sysctl_local_port_range[1] };
+       ctl_table tmp = {
+               .data = &range,
+               .maxlen = sizeof(range),
+               .mode = table->mode,
+               .extra1 = &ip_local_port_range_min,
+               .extra2 = &ip_local_port_range_max,
+       };
+
+       ret = sysctl_intvec(&tmp, name, nlen, oldval, oldlenp, newval, newlen);
+       if (ret == 0 && newval && newlen) {
+               if (range[1] <= range[0])
+                       ret = -EINVAL;
+               else
+                       set_local_port_range(range);
+       }
+       return ret;
+}
+
+
 static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file * filp,
                                       void __user *buffer, size_t *lenp, loff_t *ppos)
 {
@@ -222,7 +292,7 @@ ctl_table ipv4_table[] = {
        {
                .ctl_name       = NET_IPV4_FORWARD,
                .procname       = "ip_forward",
-               .data           = &ipv4_devconf.forwarding,
+               .data           = &IPV4_DEVCONF_ALL(FORWARDING),
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &ipv4_sysctl_forward,
@@ -288,7 +358,7 @@ ctl_table ipv4_table[] = {
        {
                .ctl_name       = NET_IPV4_IPFRAG_HIGH_THRESH,
                .procname       = "ipfrag_high_thresh",
-               .data           = &sysctl_ipfrag_high_thresh,
+               .data           = &ip4_frags_ctl.high_thresh,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
@@ -296,7 +366,7 @@ ctl_table ipv4_table[] = {
        {
                .ctl_name       = NET_IPV4_IPFRAG_LOW_THRESH,
                .procname       = "ipfrag_low_thresh",
-               .data           = &sysctl_ipfrag_low_thresh,
+               .data           = &ip4_frags_ctl.low_thresh,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
@@ -312,7 +382,7 @@ ctl_table ipv4_table[] = {
        {
                .ctl_name       = NET_IPV4_IPFRAG_TIME,
                .procname       = "ipfrag_time",
-               .data           = &sysctl_ipfrag_time,
+               .data           = &ip4_frags_ctl.timeout,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_jiffies,
@@ -427,10 +497,8 @@ ctl_table ipv4_table[] = {
                .data           = &sysctl_local_port_range,
                .maxlen         = sizeof(sysctl_local_port_range),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec_minmax,
-               .strategy       = &sysctl_intvec,
-               .extra1         = ip_local_port_range_min,
-               .extra2         = ip_local_port_range_max
+               .proc_handler   = &ipv4_local_port_range,
+               .strategy       = &ipv4_sysctl_local_port_range,
        },
        {
                .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
@@ -646,6 +714,14 @@ ctl_table ipv4_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
+       {
+               .ctl_name       = NET_TCP_FRTO_RESPONSE,
+               .procname       = "tcp_frto_response",
+               .data           = &sysctl_tcp_frto_response,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
        {
                .ctl_name       = NET_TCP_LOW_LATENCY,
                .procname       = "tcp_low_latency",
@@ -657,7 +733,7 @@ ctl_table ipv4_table[] = {
        {
                .ctl_name       = NET_IPV4_IPFRAG_SECRET_INTERVAL,
                .procname       = "ipfrag_secret_interval",
-               .data           = &sysctl_ipfrag_secret_interval,
+               .data           = &ip4_frags_ctl.secret_interval,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_jiffies,
@@ -803,6 +879,14 @@ ctl_table ipv4_table[] = {
                .proc_handler   = &proc_allowed_congestion_control,
                .strategy       = &strategy_allowed_congestion_control,
        },
+       {
+               .ctl_name       = NET_TCP_MAX_SSTHRESH,
+               .procname       = "tcp_max_ssthresh",
+               .data           = &sysctl_tcp_max_ssthresh,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
        { .ctl_name = 0 }
 };