net: split rt_genid for ipv4 and ipv6
Current net name space has only one genid for both IPv4 and IPv6, it has below
drawbacks:
- Add/delete an IPv4 address will invalidate all IPv6 routing table entries.
- Insert/remove XFRM policy will also invalidate both IPv4/IPv6 routing table
entries even when the policy is only applied for one address family.
Thus, this patch attempt to split one genid for two to cater for IPv4 and IPv6
separately in a fine granularity.
Signed-off-by: Fan Du <fan.du@windriver.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/security/selinux/include/xfrm.h b/security/selinux/include/xfrm.h
index 65f67cb..6713f04 100644
--- a/security/selinux/include/xfrm.h
+++ b/security/selinux/include/xfrm.h
@@ -50,8 +50,13 @@
static inline void selinux_xfrm_notify_policyload(void)
{
+ struct net *net;
+
atomic_inc(&flow_cache_genid);
- rt_genid_bump(&init_net);
+ rtnl_lock();
+ for_each_net(net)
+ rt_genid_bump_all(net);
+ rtnl_unlock();
}
#else
static inline int selinux_xfrm_enabled(void)