Commit 710ab6c0 authored by David S. Miller's avatar David S. Miller
Browse files

ipv4: Enforce max MTU metric at route insertion time.



Rather than at every struct rtable creation.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5943634f
......@@ -794,6 +794,8 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
val = nla_get_u32(nla);
if (type == RTAX_ADVMSS && val > 65535 - 40)
val = 65535 - 40;
if (type == RTAX_MTU && val > 65535 - 15)
val = 65535 - 15;
fi->fib_metrics[type - 1] = val;
}
}
......
......@@ -1763,21 +1763,16 @@ static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *fl4,
const struct fib_result *res,
struct fib_info *fi, u16 type, u32 itag)
{
struct dst_entry *dst = &rt->dst;
if (fi) {
if (FIB_RES_GW(*res) &&
FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
rt->rt_gateway = FIB_RES_GW(*res);
rt_init_metrics(rt, fl4, fi);
#ifdef CONFIG_IP_ROUTE_CLASSID
dst->tclassid = FIB_RES_NH(*res).nh_tclassid;
rt->dst.tclassid = FIB_RES_NH(*res).nh_tclassid;
#endif
}
if (dst_mtu(dst) > IP_MAX_MTU)
dst_metric_set(dst, RTAX_MTU, IP_MAX_MTU);
#ifdef CONFIG_IP_ROUTE_CLASSID
#ifdef CONFIG_IP_MULTIPLE_TABLES
set_class_tag(rt, fib_rules_tclass(res));
......
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