Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following patchset contains Netfilter updates for net-next:

1) Clean up and consolidate ct ecache infrastructure by merging ct and
   expect notifiers, from Florian Westphal.

2) Missing counters and timestamp in nfnetlink_queue and _log conntrack
   information.

3) Missing error check for xt_register_template() in iptables mangle,
   as a incremental fix for the previous pull request, also from
   Florian Westphal.

4) Add netfilter hooks for the SRv6 lightweigh tunnel driver, from
   Ryoga Sato. The hooks are enabled via nf_hooks_lwtunnel sysctl
   to make sure existing netfilter rulesets do not break. There is
   a static key to disable the hooks by default.

   The pktgen_bench_xmit_mode_netif_receive.sh shows no noticeable
   impact in the seg6_input path for non-netfilter users: similar
   numbers with and without this patch.

   This is a sample of the perf report output:

    11.67%  kpktgend_0       [ipv6]                    [k] ipv6_get_saddr_eval
     7.89%  kpktgend_0       [ipv6]                    [k] __ipv6_addr_label
     7.52%  kpktgend_0       [ipv6]                    [k] __ipv6_dev_get_saddr
     6.63%  kpktgend_0       [kernel.vmlinux]          [k] asm_exc_nmi
     4.74%  kpktgend_0       [ipv6]                    [k] fib6_node_lookup_1
     3.48%  kpktgend_0       [kernel.vmlinux]          [k] pskb_expand_head
     3.33%  kpktgend_0       [ipv6]                    [k] ip6_rcv_core.isra.29
     3.33%  kpktgend_0       [ipv6]                    [k] seg6_do_srh_encap
     2.53%  kpktgend_0       [ipv6]                    [k] ipv6_dev_get_saddr
     2.45%  kpktgend_0       [ipv6]                    [k] fib6_table_lookup
     2.24%  kpktgend_0       [kernel.vmlinux]          [k] ___cache_free
     2.16%  kpktgend_0       [ipv6]                    [k] ip6_pol_route
     2.11%  kpktgend_0       [kernel.vmlinux]          [k] __ipv6_addr_type
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/lwtunnel.h

@@ -51,6 +51,9 @@ struct lwtunnel_encap_ops {
 };
 
 #ifdef CONFIG_LWTUNNEL
+
+DECLARE_STATIC_KEY_FALSE(nf_hooks_lwtunnel_enabled);
+
 void lwtstate_free(struct lwtunnel_state *lws);
 
 static inline struct lwtunnel_state *

include/net/netfilter/nf_conntrack_ecache.h

@@ -72,14 +72,20 @@ struct nf_ct_event {
 	int report;
 };
 
-struct nf_ct_event_notifier {
-	int (*fcn)(unsigned int events, struct nf_ct_event *item);
+struct nf_exp_event {
+	struct nf_conntrack_expect *exp;
+	u32 portid;
+	int report;
 };
 
-int nf_conntrack_register_notifier(struct net *net,
-				   struct nf_ct_event_notifier *nb);
-void nf_conntrack_unregister_notifier(struct net *net,
-				      struct nf_ct_event_notifier *nb);
+struct nf_ct_event_notifier {
+	int (*ct_event)(unsigned int events, const struct nf_ct_event *item);
+	int (*exp_event)(unsigned int events, const struct nf_exp_event *item);
+};
+
+void nf_conntrack_register_notifier(struct net *net,
+				   const struct nf_ct_event_notifier *nb);
+void nf_conntrack_unregister_notifier(struct net *net);
 
 void nf_ct_deliver_cached_events(struct nf_conn *ct);
 int nf_conntrack_eventmask_report(unsigned int eventmask, struct nf_conn *ct,
@@ -151,22 +157,6 @@ nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct)
 }
 
 #ifdef CONFIG_NF_CONNTRACK_EVENTS
-
-struct nf_exp_event {
-	struct nf_conntrack_expect *exp;
-	u32 portid;
-	int report;
-};
-
-struct nf_exp_event_notifier {
-	int (*fcn)(unsigned int events, struct nf_exp_event *item);
-};
-
-int nf_ct_expect_register_notifier(struct net *net,
-				   struct nf_exp_event_notifier *nb);
-void nf_ct_expect_unregister_notifier(struct net *net,
-				      struct nf_exp_event_notifier *nb);
-
 void nf_ct_expect_event_report(enum ip_conntrack_expect_events event,
 			       struct nf_conntrack_expect *exp,
 			       u32 portid, int report);

include/net/netfilter/nf_hooks_lwtunnel.h

@@ -0,0 +1,7 @@
+#include <linux/sysctl.h>
+#include <linux/types.h>
+
+#ifdef CONFIG_SYSCTL
+int nf_hooks_lwtunnel_sysctl_handler(struct ctl_table *table, int write,
+				     void *buffer, size_t *lenp, loff_t *ppos);
+#endif

include/net/netns/conntrack.h

@@ -113,7 +113,6 @@ struct netns_ct {
 	struct ct_pcpu __percpu *pcpu_lists;
 	struct ip_conntrack_stat __percpu *stat;
 	struct nf_ct_event_notifier __rcu *nf_conntrack_event_cb;
-	struct nf_exp_event_notifier __rcu *nf_expect_event_cb;
 	struct nf_ip_net	nf_ct_proto;
 #if defined(CONFIG_NF_CONNTRACK_LABELS)
 	unsigned int		labels_used;