/* BSD 4.2 compatibility hack :-( */
if (mtu == 0 &&
- old_mtu >= dst_metric(&rth->u.dst, RTAX_MTU) &&
+ old_mtu >= dst_mtu(&rth->u.dst) &&
old_mtu >= 68 + (iph->ihl << 2))
old_mtu -= iph->ihl << 2;
mtu = guess_mtu(old_mtu);
}
- if (mtu <= dst_metric(&rth->u.dst, RTAX_MTU)) {
- if (mtu < dst_metric(&rth->u.dst, RTAX_MTU)) {
+ if (mtu <= dst_mtu(&rth->u.dst)) {
+ if (mtu < dst_mtu(&rth->u.dst)) {
dst_confirm(&rth->u.dst);
if (mtu < ip_rt_min_pmtu) {
mtu = ip_rt_min_pmtu;
static void ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
{
- if (dst_metric(dst, RTAX_MTU) > mtu && mtu >= 68 &&
+ if (dst_mtu(dst) > mtu && mtu >= 68 &&
!(dst_metric_locked(dst, RTAX_MTU))) {
if (mtu < ip_rt_min_pmtu) {
mtu = ip_rt_min_pmtu;
if (dst_metric(&rt->u.dst, RTAX_HOPLIMIT) == 0)
rt->u.dst.metrics[RTAX_HOPLIMIT-1] = sysctl_ip_default_ttl;
- if (dst_metric(&rt->u.dst, RTAX_MTU) > IP_MAX_MTU)
+ if (dst_mtu(&rt->u.dst) > IP_MAX_MTU)
rt->u.dst.metrics[RTAX_MTU-1] = IP_MAX_MTU;
if (dst_metric(&rt->u.dst, RTAX_ADVMSS) == 0)
rt->u.dst.metrics[RTAX_ADVMSS-1] = max_t(unsigned int, rt->u.dst.dev->mtu - 40,
return 0;
}
+static void rt_secret_reschedule(int old)
+{
+ struct net *net;
+ int new = ip_rt_secret_interval;
+ int diff = new - old;
+
+ if (!diff)
+ return;
+
+ rtnl_lock();
+ for_each_net(net) {
+ int deleted = del_timer_sync(&net->ipv4.rt_secret_timer);
+
+ if (!new)
+ continue;
+
+ if (deleted) {
+ long time = net->ipv4.rt_secret_timer.expires - jiffies;
+
+ if (time <= 0 || (time += diff) <= 0)
+ time = 0;
+
+ net->ipv4.rt_secret_timer.expires = time;
+ } else
+ net->ipv4.rt_secret_timer.expires = new;
+
+ net->ipv4.rt_secret_timer.expires += jiffies;
+ add_timer(&net->ipv4.rt_secret_timer);
+ }
+ rtnl_unlock();
+}
+
+static int ipv4_sysctl_rt_secret_interval(ctl_table *ctl, int write,
+ struct file *filp,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos)
+{
+ int old = ip_rt_secret_interval;
+ int ret = proc_dointvec_jiffies(ctl, write, filp, buffer, lenp, ppos);
+
+ rt_secret_reschedule(old);
+
+ return ret;
+}
+
+static int ipv4_sysctl_rt_secret_interval_strategy(ctl_table *table,
+ int __user *name,
+ int nlen,
+ void __user *oldval,
+ size_t __user *oldlenp,
+ void __user *newval,
+ size_t newlen)
+{
+ int old = ip_rt_secret_interval;
+ int ret = sysctl_jiffies(table, name, nlen, oldval, oldlenp, newval,
+ newlen);
+
+ rt_secret_reschedule(old);
+
+ return ret;
+}
+
static ctl_table ipv4_route_table[] = {
{
.ctl_name = NET_IPV4_ROUTE_GC_THRESH,
.data = &ip_rt_secret_interval,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- .strategy = &sysctl_jiffies,
+ .proc_handler = &ipv4_sysctl_rt_secret_interval,
+ .strategy = &ipv4_sysctl_rt_secret_interval_strategy,
},
{ .ctl_name = 0 }
};
net->ipv4.rt_secret_timer.data = (unsigned long)net;
init_timer_deferrable(&net->ipv4.rt_secret_timer);
- net->ipv4.rt_secret_timer.expires =
- jiffies + net_random() % ip_rt_secret_interval +
- ip_rt_secret_interval;
- add_timer(&net->ipv4.rt_secret_timer);
+ if (ip_rt_secret_interval) {
+ net->ipv4.rt_secret_timer.expires =
+ jiffies + net_random() % ip_rt_secret_interval +
+ ip_rt_secret_interval;
+ add_timer(&net->ipv4.rt_secret_timer);
+ }
return 0;
}