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

Pablo Neira Ayuso says:

====================
Netfilter/IPVS updates for net-next

The following patchset contains Netfilter/IPVS updates for your net-next tree:

1) Introduce a hashtable to speed up object lookups, from Florian Westphal.

2) Make direct calls to built-in extension, also from Florian.

3) Call helper before confirming the conntrack as it used to be originally,
   from Florian.

4) Call request_module() to autoload br_netfilter when physdev is used
   to relax the dependency, also from Florian.

5) Allow to insert rules at a given position ID that is internal to the
   batch, from Phil Sutter.

6) Several patches to replace conntrack indirections by direct calls,
   and to reduce modularization, from Florian. This also includes
   several follow up patches to deal with minor fallout from this
   rework.

7) Use RCU from conntrack gre helper, from Florian.

8) GRE conntrack module becomes built-in into nf_conntrack, from Florian.

9) Replace nf_ct_invert_tuplepr() by calls to nf_ct_invert_tuple(),
   from Florian.

10) Unify sysctl handling at the core of nf_conntrack, from Florian.

11) Provide modparam to register conntrack hooks.

12) Allow to match on the interface kind string, from wenxu.

13) Remove several exported symbols, not required anymore now after
    a bit of de-modulatization work has been done, from Florian.

14) Remove built-in map support in the hash extension, this can be
    done with the existing userspace infrastructure, from laura.

15) Remove indirection to calculate checksums in IPVS, from Matteo Croce.

16) Use call wrappers for indirection in IPVS, also from Matteo.

17) Remove superfluous __percpu parameter in nft_counter, patch from
    Luc Van Oostenryck.
====================

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

43 files changed, 1034 insertions, 1567 deletions

diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index beb3a69ce1d4..fefd63a243f2 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -174,7 +174,7 @@ config NF_CT_PROTO_DCCP
 	  If unsure, say Y.
 
 config NF_CT_PROTO_GRE
-	tristate
+	bool
 
 config NF_CT_PROTO_SCTP
 	bool 'SCTP protocol connection tracking support'
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 1ae65a314d7a..e66067befa42 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -13,6 +13,7 @@ nf_conntrack-$(CONFIG_NF_CONNTRACK_EVENTS) += nf_conntrack_ecache.o
 nf_conntrack-$(CONFIG_NF_CONNTRACK_LABELS) += nf_conntrack_labels.o
 nf_conntrack-$(CONFIG_NF_CT_PROTO_DCCP) += nf_conntrack_proto_dccp.o
 nf_conntrack-$(CONFIG_NF_CT_PROTO_SCTP) += nf_conntrack_proto_sctp.o
+nf_conntrack-$(CONFIG_NF_CT_PROTO_GRE) += nf_conntrack_proto_gre.o
 
 obj-$(CONFIG_NETFILTER) = netfilter.o
 
@@ -25,8 +26,6 @@ obj-$(CONFIG_NETFILTER_NETLINK_OSF) += nfnetlink_osf.o
 # connection tracking
 obj-$(CONFIG_NF_CONNTRACK) += nf_conntrack.o
 
-obj-$(CONFIG_NF_CT_PROTO_GRE) += nf_conntrack_proto_gre.o
-
 # netlink interface for nf_conntrack
 obj-$(CONFIG_NF_CT_NETLINK) += nf_conntrack_netlink.o
 obj-$(CONFIG_NF_CT_NETLINK_TIMEOUT) += nfnetlink_cttimeout.o
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index fe9abf3cc10a..e969dad66991 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -53,6 +53,7 @@
 #endif
 
 #include <net/ip_vs.h>
+#include <linux/indirect_call_wrapper.h>
 
 
 EXPORT_SYMBOL(register_ip_vs_scheduler);
@@ -70,6 +71,29 @@ EXPORT_SYMBOL(ip_vs_get_debug_level);
 #endif
 EXPORT_SYMBOL(ip_vs_new_conn_out);
 
+#ifdef CONFIG_IP_VS_PROTO_TCP
+INDIRECT_CALLABLE_DECLARE(int
+	tcp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
+			 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph));
+#endif
+
+#ifdef CONFIG_IP_VS_PROTO_UDP
+INDIRECT_CALLABLE_DECLARE(int
+	udp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
+			 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph));
+#endif
+
+#if defined(CONFIG_IP_VS_PROTO_TCP) && defined(CONFIG_IP_VS_PROTO_UDP)
+#define SNAT_CALL(f, ...) \
+	INDIRECT_CALL_2(f, tcp_snat_handler, udp_snat_handler, __VA_ARGS__)
+#elif defined(CONFIG_IP_VS_PROTO_TCP)
+#define SNAT_CALL(f, ...) INDIRECT_CALL_1(f, tcp_snat_handler, __VA_ARGS__)
+#elif defined(CONFIG_IP_VS_PROTO_UDP)
+#define SNAT_CALL(f, ...) INDIRECT_CALL_1(f, udp_snat_handler, __VA_ARGS__)
+#else
+#define SNAT_CALL(f, ...) f(__VA_ARGS__)
+#endif
+
 static unsigned int ip_vs_net_id __read_mostly;
 /* netns cnt used for uniqueness */
 static atomic_t ipvs_netns_cnt = ATOMIC_INIT(0);
@@ -478,7 +502,9 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
 	 */
 	if ((!skb->dev || skb->dev->flags & IFF_LOOPBACK)) {
 		iph->hdr_flags ^= IP_VS_HDR_INVERSE;
-		cp = pp->conn_in_get(svc->ipvs, svc->af, skb, iph);
+		cp = INDIRECT_CALL_1(pp->conn_in_get,
+				     ip_vs_conn_in_get_proto, svc->ipvs,
+				     svc->af, skb, iph);
 		iph->hdr_flags ^= IP_VS_HDR_INVERSE;
 
 		if (cp) {
@@ -972,7 +998,8 @@ static int ip_vs_out_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb,
 	ip_vs_fill_iph_skb_icmp(AF_INET, skb, offset, true, &ciph);
 
 	/* The embedded headers contain source and dest in reverse order */
-	cp = pp->conn_out_get(ipvs, AF_INET, skb, &ciph);
+	cp = INDIRECT_CALL_1(pp->conn_out_get, ip_vs_conn_out_get_proto,
+			     ipvs, AF_INET, skb, &ciph);
 	if (!cp)
 		return NF_ACCEPT;
 
@@ -1028,7 +1055,8 @@ static int ip_vs_out_icmp_v6(struct netns_ipvs *ipvs, struct sk_buff *skb,
 		return NF_ACCEPT;
 
 	/* The embedded headers contain source and dest in reverse order */
-	cp = pp->conn_out_get(ipvs, AF_INET6, skb, &ciph);
+	cp = INDIRECT_CALL_1(pp->conn_out_get, ip_vs_conn_out_get_proto,
+			     ipvs, AF_INET6, skb, &ciph);
 	if (!cp)
 		return NF_ACCEPT;
 
@@ -1263,7 +1291,8 @@ handle_response(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
 		goto drop;
 
 	/* mangle the packet */
-	if (pp->snat_handler && !pp->snat_handler(skb, pp, cp, iph))
+	if (pp->snat_handler &&
+	    !SNAT_CALL(pp->snat_handler, skb, pp, cp, iph))
 		goto drop;
 
 #ifdef CONFIG_IP_VS_IPV6
@@ -1389,7 +1418,8 @@ ip_vs_out(struct netns_ipvs *ipvs, unsigned int hooknum, struct sk_buff *skb, in
 	/*
 	 * Check if the packet belongs to an existing entry
 	 */
-	cp = pp->conn_out_get(ipvs, af, skb, &iph);
+	cp = INDIRECT_CALL_1(pp->conn_out_get, ip_vs_conn_out_get_proto,
+			     ipvs, af, skb, &iph);
 
 	if (likely(cp)) {
 		if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ)
@@ -1644,7 +1674,8 @@ ip_vs_in_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb, int *related,
 	/* The embedded headers contain source and dest in reverse order.
 	 * For IPIP this is error for request, not for reply.
 	 */
-	cp = pp->conn_in_get(ipvs, AF_INET, skb, &ciph);
+	cp = INDIRECT_CALL_1(pp->conn_in_get, ip_vs_conn_in_get_proto,
+			     ipvs, AF_INET, skb, &ciph);
 
 	if (!cp) {
 		int v;
@@ -1796,7 +1827,8 @@ static int ip_vs_in_icmp_v6(struct netns_ipvs *ipvs, struct sk_buff *skb,
 	/* The embedded headers contain source and dest in reverse order
 	 * if not from localhost
 	 */
-	cp = pp->conn_in_get(ipvs, AF_INET6, skb, &ciph);
+	cp = INDIRECT_CALL_1(pp->conn_in_get, ip_vs_conn_in_get_proto,
+			     ipvs, AF_INET6, skb, &ciph);
 
 	if (!cp) {
 		int v;
@@ -1925,7 +1957,8 @@ ip_vs_in(struct netns_ipvs *ipvs, unsigned int hooknum, struct sk_buff *skb, int
 	/*
 	 * Check if the packet belongs to an existing connection entry
 	 */
-	cp = pp->conn_in_get(ipvs, af, skb, &iph);
+	cp = INDIRECT_CALL_1(pp->conn_in_get, ip_vs_conn_in_get_proto,
+			     ipvs, af, skb, &iph);
 
 	conn_reuse_mode = sysctl_conn_reuse_mode(ipvs);
 	if (conn_reuse_mode && !iph.fragoffs && is_new_conn(skb, &iph) && cp) {
diff --git a/net/netfilter/ipvs/ip_vs_proto_ah_esp.c b/net/netfilter/ipvs/ip_vs_proto_ah_esp.c
index 5320d39976e1..480598cb0f05 100644
--- a/net/netfilter/ipvs/ip_vs_proto_ah_esp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_ah_esp.c
@@ -129,7 +129,6 @@ struct ip_vs_protocol ip_vs_protocol_ah = {
 	.conn_out_get =		ah_esp_conn_out_get,
 	.snat_handler =		NULL,
 	.dnat_handler =		NULL,
-	.csum_check =		NULL,
 	.state_transition =	NULL,
 	.register_app =		NULL,
 	.unregister_app =	NULL,
@@ -152,7 +151,6 @@ struct ip_vs_protocol ip_vs_protocol_esp = {
 	.conn_out_get =		ah_esp_conn_out_get,
 	.snat_handler =		NULL,
 	.dnat_handler =		NULL,
-	.csum_check =		NULL,
 	.state_transition =	NULL,
 	.register_app =		NULL,
 	.unregister_app =	NULL,
diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c b/net/netfilter/ipvs/ip_vs_proto_sctp.c
index b0cd7d08f2a7..bc3d1625ecc8 100644
--- a/net/netfilter/ipvs/ip_vs_proto_sctp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c
@@ -10,6 +10,9 @@
 #include <net/ip_vs.h>
 
 static int
+sctp_csum_check(int af, struct sk_buff *skb, struct ip_vs_protocol *pp);
+
+static int
 sctp_conn_schedule(struct netns_ipvs *ipvs, int af, struct sk_buff *skb,
 		   struct ip_vs_proto_data *pd,
 		   int *verdict, struct ip_vs_conn **cpp,
@@ -105,7 +108,7 @@ sctp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		int ret;
 
 		/* Some checks before mangling */
-		if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
+		if (!sctp_csum_check(cp->af, skb, pp))
 			return 0;
 
 		/* Call application helper if needed */
@@ -152,7 +155,7 @@ sctp_dnat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		int ret;
 
 		/* Some checks before mangling */
-		if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
+		if (!sctp_csum_check(cp->af, skb, pp))
 			return 0;
 
 		/* Call application helper if needed */
@@ -587,7 +590,6 @@ struct ip_vs_protocol ip_vs_protocol_sctp = {
 	.conn_out_get	= ip_vs_conn_out_get_proto,
 	.snat_handler	= sctp_snat_handler,
 	.dnat_handler	= sctp_dnat_handler,
-	.csum_check	= sctp_csum_check,
 	.state_name	= sctp_state_name,
 	.state_transition = sctp_state_transition,
 	.app_conn_bind	= sctp_app_conn_bind,
diff --git a/net/netfilter/ipvs/ip_vs_proto_tcp.c b/net/netfilter/ipvs/ip_vs_proto_tcp.c
index 1770fc6ce960..479419759983 100644
--- a/net/netfilter/ipvs/ip_vs_proto_tcp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_tcp.c
@@ -28,10 +28,14 @@
 #include <net/ip6_checksum.h>
 #include <linux/netfilter.h>
 #include <linux/netfilter_ipv4.h>
+#include <linux/indirect_call_wrapper.h>
 
 #include <net/ip_vs.h>
 
 static int
+tcp_csum_check(int af, struct sk_buff *skb, struct ip_vs_protocol *pp);
+
+static int
 tcp_conn_schedule(struct netns_ipvs *ipvs, int af, struct sk_buff *skb,
 		  struct ip_vs_proto_data *pd,
 		  int *verdict, struct ip_vs_conn **cpp,
@@ -143,7 +147,7 @@ tcp_partial_csum_update(int af, struct tcphdr *tcph,
 }
 
 
-static int
+INDIRECT_CALLABLE_SCOPE int
 tcp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)
 {
@@ -166,7 +170,7 @@ tcp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		int ret;
 
 		/* Some checks before mangling */
-		if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
+		if (!tcp_csum_check(cp->af, skb, pp))
 			return 0;
 
 		/* Call application helper if needed */
@@ -192,7 +196,7 @@ tcp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		tcp_fast_csum_update(cp->af, tcph, &cp->daddr, &cp->vaddr,
 				     cp->dport, cp->vport);
 		if (skb->ip_summed == CHECKSUM_COMPLETE)
-			skb->ip_summed = (cp->app && pp->csum_check) ?
+			skb->ip_summed = cp->app ?
 					 CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
 	} else {
 		/* full checksum calculation */
@@ -244,7 +248,7 @@ tcp_dnat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		int ret;
 
 		/* Some checks before mangling */
-		if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
+		if (!tcp_csum_check(cp->af, skb, pp))
 			return 0;
 
 		/*
@@ -275,7 +279,7 @@ tcp_dnat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		tcp_fast_csum_update(cp->af, tcph, &cp->vaddr, &cp->daddr,
 				     cp->vport, cp->dport);
 		if (skb->ip_summed == CHECKSUM_COMPLETE)
-			skb->ip_summed = (cp->app && pp->csum_check) ?
+			skb->ip_summed = cp->app ?
 					 CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
 	} else {
 		/* full checksum calculation */
@@ -736,7 +740,6 @@ struct ip_vs_protocol ip_vs_protocol_tcp = {
 	.conn_out_get =		ip_vs_conn_out_get_proto,
 	.snat_handler =		tcp_snat_handler,
 	.dnat_handler =		tcp_dnat_handler,
-	.csum_check =		tcp_csum_check,
 	.state_name =		tcp_state_name,
 	.state_transition =	tcp_state_transition,
 	.app_conn_bind =	tcp_app_conn_bind,
diff --git a/net/netfilter/ipvs/ip_vs_proto_udp.c b/net/netfilter/ipvs/ip_vs_proto_udp.c
index 0f53c49025f8..646c384910fb 100644
--- a/net/netfilter/ipvs/ip_vs_proto_udp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_udp.c
@@ -23,12 +23,16 @@
 #include <linux/netfilter.h>
 #include <linux/netfilter_ipv4.h>
 #include <linux/udp.h>
+#include <linux/indirect_call_wrapper.h>
 
 #include <net/ip_vs.h>
 #include <net/ip.h>
 #include <net/ip6_checksum.h>
 
 static int
+udp_csum_check(int af, struct sk_buff *skb, struct ip_vs_protocol *pp);
+
+static int
 udp_conn_schedule(struct netns_ipvs *ipvs, int af, struct sk_buff *skb,
 		  struct ip_vs_proto_data *pd,
 		  int *verdict, struct ip_vs_conn **cpp,
@@ -133,7 +137,7 @@ udp_partial_csum_update(int af, struct udphdr *uhdr,
 }
 
 
-static int
+INDIRECT_CALLABLE_SCOPE int
 udp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)
 {
@@ -156,7 +160,7 @@ udp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		int ret;
 
 		/* Some checks before mangling */
-		if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
+		if (!udp_csum_check(cp->af, skb, pp))
 			return 0;
 
 		/*
@@ -186,7 +190,7 @@ udp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		udp_fast_csum_update(cp->af, udph, &cp->daddr, &cp->vaddr,
 				     cp->dport, cp->vport);
 		if (skb->ip_summed == CHECKSUM_COMPLETE)
-			skb->ip_summed = (cp->app && pp->csum_check) ?
+			skb->ip_summed = cp->app ?
 					 CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
 	} else {
 		/* full checksum calculation */
@@ -239,7 +243,7 @@ udp_dnat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		int ret;
 
 		/* Some checks before mangling */
-		if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
+		if (!udp_csum_check(cp->af, skb, pp))
 			return 0;
 
 		/*
@@ -270,7 +274,7 @@ udp_dnat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
 		udp_fast_csum_update(cp->af, udph, &cp->vaddr, &cp->daddr,
 				     cp->vport, cp->dport);
 		if (skb->ip_summed == CHECKSUM_COMPLETE)
-			skb->ip_summed = (cp->app && pp->csum_check) ?
+			skb->ip_summed = cp->app ?
 					 CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
 	} else {
 		/* full checksum calculation */
@@ -494,7 +498,6 @@ struct ip_vs_protocol ip_vs_protocol_udp = {
 	.conn_out_get =		ip_vs_conn_out_get_proto,
 	.snat_handler =		udp_snat_handler,
 	.dnat_handler =		udp_dnat_handler,
-	.csum_check =		udp_csum_check,
 	.state_transition =	udp_state_transition,
 	.state_name =		udp_state_name,
 	.register_app =		udp_register_app,
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 741b533148ba..815956ac5a76 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -222,6 +222,24 @@ static u32 hash_conntrack(const struct net *net,
 	return scale_hash(hash_conntrack_raw(tuple, net));
 }
 
+static bool nf_ct_get_tuple_ports(const struct sk_buff *skb,
+				  unsigned int dataoff,
+				  struct nf_conntrack_tuple *tuple)
+{	struct {
+		__be16 sport;
+		__be16 dport;
+	} _inet_hdr, *inet_hdr;
+
+	/* Actually only need first 4 bytes to get ports. */
+	inet_hdr = skb_header_pointer(skb, dataoff, sizeof(_inet_hdr), &_inet_hdr);
+	if (!inet_hdr)
+		return false;
+
+	tuple->src.u.udp.port = inet_hdr->sport;
+	tuple->dst.u.udp.port = inet_hdr->dport;
+	return true;
+}
+
 static bool
 nf_ct_get_tuple(const struct sk_buff *skb,
 		unsigned int nhoff,
@@ -229,16 +247,11 @@ nf_ct_get_tuple(const struct sk_buff *skb,
 		u_int16_t l3num,
 		u_int8_t protonum,
 		struct net *net,
-		struct nf_conntrack_tuple *tuple,
-		const struct nf_conntrack_l4proto *l4proto)
+		struct nf_conntrack_tuple *tuple)
 {
 	unsigned int size;
 	const __be32 *ap;
 	__be32 _addrs[8];
-	struct {
-		__be16 sport;
-		__be16 dport;
-	} _inet_hdr, *inet_hdr;
 
 	memset(tuple, 0, sizeof(*tuple));
 
@@ -274,16 +287,36 @@ nf_ct_get_tuple(const struct sk_buff *skb,
 	tuple->dst.protonum = protonum;
 	tuple->dst.dir = IP_CT_DIR_ORIGINAL;
 
-	if (unlikely(l4proto->pkt_to_tuple))
-		return l4proto->pkt_to_tuple(skb, dataoff, net, tuple);
-
-	/* Actually only need first 4 bytes to get ports. */
-	inet_hdr = skb_header_pointer(skb, dataoff, sizeof(_inet_hdr), &_inet_hdr);
-	if (!inet_hdr)
-		return false;
+	switch (protonum) {
+#if IS_ENABLED(CONFIG_IPV6)
+	case IPPROTO_ICMPV6:
+		return icmpv6_pkt_to_tuple(skb, dataoff, net, tuple);
+#endif
+	case IPPROTO_ICMP:
+		return icmp_pkt_to_tuple(skb, dataoff, net, tuple);
+#ifdef CONFIG_NF_CT_PROTO_GRE
+	case IPPROTO_GRE:
+		return gre_pkt_to_tuple(skb, dataoff, net, tuple);
+#endif
+	case IPPROTO_TCP:
+	case IPPROTO_UDP: /* fallthrough */
+		return nf_ct_get_tuple_ports(skb, dataoff, tuple);
+#ifdef CONFIG_NF_CT_PROTO_UDPLITE
+	case IPPROTO_UDPLITE:
+		return nf_ct_get_tuple_ports(skb, dataoff, tuple);
+#endif
+#ifdef CONFIG_NF_CT_PROTO_SCTP
+	case IPPROTO_SCTP:
+		return nf_ct_get_tuple_ports(skb, dataoff, tuple);
+#endif
+#ifdef CONFIG_NF_CT_PROTO_DCCP
+	case IPPROTO_DCCP:
+		return nf_ct_get_tuple_ports(skb, dataoff, tuple);
+#endif
+	default:
+		break;
+	}
 
-	tuple->src.u.udp.port = inet_hdr->sport;
-	tuple->dst.u.udp.port = inet_hdr->dport;
 	return true;
 }
 
@@ -366,33 +399,20 @@ bool nf_ct_get_tuplepr(const struct sk_buff *skb, unsigned int nhoff,
 		       u_int16_t l3num,
 		       struct net *net, struct nf_conntrack_tuple *tuple)
 {
-	const struct nf_conntrack_l4proto *l4proto;
 	u8 protonum;
 	int protoff;
-	int ret;
-
-	rcu_read_lock();
 
 	protoff = get_l4proto(skb, nhoff, l3num, &protonum);
-	if (protoff <= 0) {
-		rcu_read_unlock();
+	if (protoff <= 0)
 		return false;
-	}
-
-	l4proto = __nf_ct_l4proto_find(protonum);
 
-	ret = nf_ct_get_tuple(skb, nhoff, protoff, l3num, protonum, net, tuple,
-			      l4proto);
-
-	rcu_read_unlock();
-	return ret;
+	return nf_ct_get_tuple(skb, nhoff, protoff, l3num, protonum, net, tuple);
 }
 EXPORT_SYMBOL_GPL(nf_ct_get_tuplepr);
 
 bool
 nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
-		   const struct nf_conntrack_tuple *orig,
-		   const struct nf_conntrack_l4proto *l4proto)
+		   const struct nf_conntrack_tuple *orig)
 {
 	memset(inverse, 0, sizeof(*inverse));
 
@@ -415,8 +435,14 @@ nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
 
 	inverse->dst.protonum = orig->dst.protonum;
 
-	if (unlikely(l4proto->invert_tuple))
-		return l4proto->invert_tuple(inverse, orig);
+	switch (orig->dst.protonum) {
+	case IPPROTO_ICMP:
+		return nf_conntrack_invert_icmp_tuple(inverse, orig);
+#if IS_ENABLED(CONFIG_IPV6)
+	case IPPROTO_ICMPV6:
+		return nf_conntrack_invert_icmpv6_tuple(inverse, orig);
+#endif
+	}
 
 	inverse->src.u.all = orig->dst.u.all;
 	inverse->dst.u.all = orig->src.u.all;
@@ -526,11 +552,20 @@ void nf_ct_tmpl_free(struct nf_conn *tmpl)
 }
 EXPORT_SYMBOL_GPL(nf_ct_tmpl_free);
 
+static void destroy_gre_conntrack(struct nf_conn *ct)
+{
+#ifdef CONFIG_NF_CT_PROTO_GRE
+	struct nf_conn *master = ct->master;
+
+	if (master)
+		nf_ct_gre_keymap_destroy(master);
+#endif
+}
+
 static void
 destroy_conntrack(struct nf_conntrack *nfct)
 {
 	struct nf_conn *ct = (struct nf_conn *)nfct;
-	const struct nf_conntrack_l4proto *l4proto;
 
 	pr_debug("destroy_conntrack(%p)\n", ct);
 	WARN_ON(atomic_read(&nfct->use) != 0);
@@ -539,9 +574,9 @@ destroy_conntrack(struct nf_conntrack *nfct)
 		nf_ct_tmpl_free(ct);
 		return;
 	}
-	l4proto = __nf_ct_l4proto_find(nf_ct_protonum(ct));
-	if (l4proto->destroy)
-		l4proto->destroy(ct);
+
+	if (unlikely(nf_ct_protonum(ct) == IPPROTO_GRE))
+		destroy_gre_conntrack(ct);
 
 	local_bh_disable();
 	/* Expectations will have been removed in clean_from_lists,
@@ -840,7 +875,7 @@ static int nf_ct_resolve_clash(struct net *net, struct sk_buff *skb,
 	enum ip_conntrack_info oldinfo;
 	struct nf_conn *loser_ct = nf_ct_get(skb, &oldinfo);
 
-	l4proto = __nf_ct_l4proto_find(nf_ct_protonum(ct));
+	l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
 	if (l4proto->allow_clash &&
 	    !nf_ct_is_dying(ct) &&
 	    atomic_inc_not_zero(&ct->ct_general.use)) {
@@ -1112,7 +1147,7 @@ static bool gc_worker_can_early_drop(const struct nf_conn *ct)
 	if (!test_bit(IPS_ASSURED_BIT, &ct->status))
 		return true;
 
-	l4proto = __nf_ct_l4proto_find(nf_ct_protonum(ct));
+	l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
 	if (l4proto->can_early_drop && l4proto->can_early_drop(ct))
 		return true;
 
@@ -1342,7 +1377,6 @@ EXPORT_SYMBOL_GPL(nf_conntrack_free);
 static noinline struct nf_conntrack_tuple_hash *
 init_conntrack(struct net *net, struct nf_conn *tmpl,
 	       const struct nf_conntrack_tuple *tuple,
-	       const struct nf_conntrack_l4proto *l4proto,
 	       struct sk_buff *skb,
 	       unsigned int dataoff, u32 hash)
 {
@@ -1355,7 +1389,7 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
 	struct nf_conn_timeout *timeout_ext;
 	struct nf_conntrack_zone tmp;
 
-	if (!nf_ct_invert_tuple(&repl_tuple, tuple, l4proto)) {
+	if (!nf_ct_invert_tuple(&repl_tuple, tuple)) {
 		pr_debug("Can't invert tuple.\n");
 		return NULL;
 	}
@@ -1437,7 +1471,6 @@ resolve_normal_ct(struct nf_conn *tmpl,
 		  struct sk_buff *skb,
 		  unsigned int dataoff,
 		  u_int8_t protonum,
-		  const struct nf_conntrack_l4proto *l4proto,
 		  const struct nf_hook_state *state)
 {
 	const struct nf_conntrack_zone *zone;
@@ -1450,7 +1483,7 @@ resolve_normal_ct(struct nf_conn *tmpl,
 
 	if (!nf_ct_get_tuple(skb, skb_network_offset(skb),
 			     dataoff, state->pf, protonum, state->net,
-			     &tuple, l4proto)) {
+			     &tuple)) {
 		pr_debug("Can't get tuple\n");
 		return 0;
 	}
@@ -1460,7 +1493,7 @@ resolve_normal_ct(struct nf_conn *tmpl,
 	hash = hash_conntrack_raw(&tuple, state->net);
 	h = __nf_conntrack_find_get(state->net, zone, &tuple, hash);
 	if (!h) {
-		h = init_conntrack(state->net, tmpl, &tuple, l4proto,
+		h = init_conntrack(state->net, tmpl, &tuple,
 				   skb, dataoff, hash);
 		if (!h)
 			return 0;
@@ -1522,10 +1555,66 @@ nf_conntrack_handle_icmp(struct nf_conn *tmpl,
 	return ret;
 }
 
+static int generic_packet(struct nf_conn *ct, struct sk_buff *skb,
+			  enum ip_conntrack_info ctinfo)
+{
+	const unsigned int *timeout = nf_ct_timeout_lookup(ct);
+
+	if (!timeout)
+		timeout = &nf_generic_pernet(nf_ct_net(ct))->timeout;
+
+	nf_ct_refresh_acct(ct, ctinfo, skb, *timeout);
+	return NF_ACCEPT;
+}
+
+/* Returns verdict for packet, or -1 for invalid. */
+static int nf_conntrack_handle_packet(struct nf_conn *ct,
+				      struct sk_buff *skb,
+				      unsigned int dataoff,
+				      enum ip_conntrack_info ctinfo,
+				      const struct nf_hook_state *state)
+{
+	switch (nf_ct_protonum(ct)) {
+	case IPPROTO_TCP:
+		return nf_conntrack_tcp_packet(ct, skb, dataoff,
+					       ctinfo, state);
+	case IPPROTO_UDP:
+		return nf_conntrack_udp_packet(ct, skb, dataoff,
+					       ctinfo, state);
+	case IPPROTO_ICMP:
+		return nf_conntrack_icmp_packet(ct, skb, ctinfo, state);
+#if IS_ENABLED(CONFIG_IPV6)
+	case IPPROTO_ICMPV6:
+		return nf_conntrack_icmpv6_packet(ct, skb, ctinfo, state);
+#endif
+#ifdef CONFIG_NF_CT_PROTO_UDPLITE
+	case IPPROTO_UDPLITE:
+		return nf_conntrack_udplite_packet(ct, skb, dataoff,
+						   ctinfo, state);
+#endif
+#ifdef CONFIG_NF_CT_PROTO_SCTP
+	case IPPROTO_SCTP:
+		return nf_conntrack_sctp_packet(ct, skb, dataoff,
+						ctinfo, state);
+#endif
+#ifdef CONFIG_NF_CT_PROTO_DCCP
+	case IPPROTO_DCCP:
+		return nf_conntrack_dccp_packet(ct, skb, dataoff,
+						ctinfo, state);
+#endif
+#ifdef CONFIG_NF_CT_PROTO_GRE
+	case IPPROTO_GRE:
+		return nf_conntrack_gre_packet(ct, skb, dataoff,
+					       ctinfo, state);
+#endif
+	}
+
+	return generic_packet(ct, skb, ctinfo);
+}
+
 unsigned int
 nf_conntrack_in(struct sk_buff *skb, const struct nf_hook_state *state)
 {
-	const struct nf_conntrack_l4proto *l4proto;
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct, *tmpl;
 	u_int8_t protonum;
@@ -1552,8 +