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

Pablo Neira Ayuso says:

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

The following batch contains Netfilter updates for net-next:

1) Split flowtable workqueues per events, from Oz Shlomo.

2) fall-through warnings for clang, from Gustavo A. R. Silva

3) Remove unused declaration in conntrack, from YueHaibing.

4) Consolidate skb_try_make_writable() in flowtable datapath,
   simplify some of the existing codebase.

5) Call dst_check() to fall back to static classic forwarding path.

6) Update table flags from commit phase.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netfilter/ipv6/nf_conntrack_ipv6.h

@@ -4,7 +4,4 @@
 
 extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6;
 
-#include <linux/sysctl.h>
-extern struct ctl_table nf_ct_ipv6_sysctl_table[];
-
 #endif /* _NF_CONNTRACK_IPV6_H*/

include/net/netfilter/nf_flow_table.h

@@ -86,8 +86,8 @@ static inline bool nf_flowtable_hw_offload(struct nf_flowtable *flowtable)
 enum flow_offload_tuple_dir {
 	FLOW_OFFLOAD_DIR_ORIGINAL = IP_CT_DIR_ORIGINAL,
 	FLOW_OFFLOAD_DIR_REPLY = IP_CT_DIR_REPLY,
-	FLOW_OFFLOAD_DIR_MAX = IP_CT_DIR_MAX
 };
+#define FLOW_OFFLOAD_DIR_MAX	IP_CT_DIR_MAX
 
 struct flow_offload_tuple {
 	union {
@@ -229,12 +229,12 @@ void nf_flow_table_free(struct nf_flowtable *flow_table);
 
 void flow_offload_teardown(struct flow_offload *flow);
 
-int nf_flow_snat_port(const struct flow_offload *flow,
-		      struct sk_buff *skb, unsigned int thoff,
-		      u8 protocol, enum flow_offload_tuple_dir dir);
-int nf_flow_dnat_port(const struct flow_offload *flow,
-		      struct sk_buff *skb, unsigned int thoff,
-		      u8 protocol, enum flow_offload_tuple_dir dir);
+void nf_flow_snat_port(const struct flow_offload *flow,
+		       struct sk_buff *skb, unsigned int thoff,
+		       u8 protocol, enum flow_offload_tuple_dir dir);
+void nf_flow_dnat_port(const struct flow_offload *flow,
+		       struct sk_buff *skb, unsigned int thoff,
+		       u8 protocol, enum flow_offload_tuple_dir dir);
 
 struct flow_ports {
 	__be16 source, dest;

include/net/netfilter/nf_tables.h

@@ -1498,13 +1498,16 @@ struct nft_trans_chain {
 
 struct nft_trans_table {
 	bool				update;
-	bool				enable;
+	u8				state;
+	u32				flags;
 };
 
 #define nft_trans_table_update(trans)	\
 	(((struct nft_trans_table *)trans->data)->update)
-#define nft_trans_table_enable(trans)	\
-	(((struct nft_trans_table *)trans->data)->enable)
+#define nft_trans_table_state(trans)	\
+	(((struct nft_trans_table *)trans->data)->state)
+#define nft_trans_table_flags(trans)	\
+	(((struct nft_trans_table *)trans->data)->flags)
 
 struct nft_trans_elem {
 	struct nft_set			*set;

net/netfilter/nf_conntrack_proto_dccp.c

@@ -397,6 +397,7 @@ dccp_new(struct nf_conn *ct, const struct sk_buff *skb,
 			msg = "not picking up existing connection ";
 			goto out_invalid;
 		}
+		break;
 	case CT_DCCP_REQUEST:
 		break;
 	case CT_DCCP_INVALID:

net/netfilter/nf_flow_table_core.c

@@ -389,29 +389,20 @@ static void nf_flow_offload_work_gc(struct work_struct *work)
 	queue_delayed_work(system_power_efficient_wq, &flow_table->gc_work, HZ);
 }
 
-
-static int nf_flow_nat_port_tcp(struct sk_buff *skb, unsigned int thoff,
-				__be16 port, __be16 new_port)
+static void nf_flow_nat_port_tcp(struct sk_buff *skb, unsigned int thoff,
+				 __be16 port, __be16 new_port)
 {
 	struct tcphdr *tcph;
 
-	if (skb_try_make_writable(skb, thoff + sizeof(*tcph)))
-		return -1;
-
 	tcph = (void *)(skb_network_header(skb) + thoff);
 	inet_proto_csum_replace2(&tcph->check, skb, port, new_port, false);
-
-	return 0;
 }
 
-static int nf_flow_nat_port_udp(struct sk_buff *skb, unsigned int thoff,
-				__be16 port, __be16 new_port)
+static void nf_flow_nat_port_udp(struct sk_buff *skb, unsigned int thoff,
+				 __be16 port, __be16 new_port)
 {
 	struct udphdr *udph;
 
-	if (skb_try_make_writable(skb, thoff + sizeof(*udph)))
-		return -1;
-
 	udph = (void *)(skb_network_header(skb) + thoff);
 	if (udph->check || skb->ip_summed == CHECKSUM_PARTIAL) {
 		inet_proto_csum_replace2(&udph->check, skb, port,
@@ -419,37 +410,28 @@ static int nf_flow_nat_port_udp(struct sk_buff *skb, unsigned int thoff,
 		if (!udph->check)
 			udph->check = CSUM_MANGLED_0;
 	}
-
-	return 0;
 }
 
-static int nf_flow_nat_port(struct sk_buff *skb, unsigned int thoff,
-			    u8 protocol, __be16 port, __be16 new_port)
+static void nf_flow_nat_port(struct sk_buff *skb, unsigned int thoff,
+			     u8 protocol, __be16 port, __be16 new_port)
 {
 	switch (protocol) {
 	case IPPROTO_TCP:
-		if (nf_flow_nat_port_tcp(skb, thoff, port, new_port) < 0)
-			return NF_DROP;
+		nf_flow_nat_port_tcp(skb, thoff, port, new_port);
 		break;
 	case IPPROTO_UDP:
-		if (nf_flow_nat_port_udp(skb, thoff, port, new_port) < 0)
-			return NF_DROP;
+		nf_flow_nat_port_udp(skb, thoff, port, new_port);
 		break;
 	}
-
-	return 0;
 }
 
-int nf_flow_snat_port(const struct flow_offload *flow,
-		      struct sk_buff *skb, unsigned int thoff,
-		      u8 protocol, enum flow_offload_tuple_dir dir)
+void nf_flow_snat_port(const struct flow_offload *flow,
+		       struct sk_buff *skb, unsigned int thoff,
+		       u8 protocol, enum flow_offload_tuple_dir dir)
 {
 	struct flow_ports *hdr;
 	__be16 port, new_port;
 
-	if (skb_try_make_writable(skb, thoff + sizeof(*hdr)))
-		return -1;
-
 	hdr = (void *)(skb_network_header(skb) + thoff);
 
 	switch (dir) {
@@ -463,24 +445,19 @@ int nf_flow_snat_port(const struct flow_offload *flow,
 		new_port = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_port;
 		hdr->dest = new_port;
 		break;
-	default:
-		return -1;
 	}
 
-	return nf_flow_nat_port(skb, thoff, protocol, port, new_port);
+	nf_flow_nat_port(skb, thoff, protocol, port, new_port);
 }
 EXPORT_SYMBOL_GPL(nf_flow_snat_port);
 
-int nf_flow_dnat_port(const struct flow_offload *flow,
-		      struct sk_buff *skb, unsigned int thoff,
-		      u8 protocol, enum flow_offload_tuple_dir dir)
+void nf_flow_dnat_port(const struct flow_offload *flow, struct sk_buff *skb,
+		       unsigned int thoff, u8 protocol,
+		       enum flow_offload_tuple_dir dir)
 {
 	struct flow_ports *hdr;
 	__be16 port, new_port;
 
-	if (skb_try_make_writable(skb, thoff + sizeof(*hdr)))
-		return -1;
-
 	hdr = (void *)(skb_network_header(skb) + thoff);
 
 	switch (dir) {
@@ -494,11 +471,9 @@ int nf_flow_dnat_port(const struct flow_offload *flow,
 		new_port = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_port;
 		hdr->source = new_port;
 		break;
-	default:
-		return -1;
 	}
 
-	return nf_flow_nat_port(skb, thoff, protocol, port, new_port);
+	nf_flow_nat_port(skb, thoff, protocol, port, new_port);
 }
 EXPORT_SYMBOL_GPL(nf_flow_dnat_port);
 

net/netfilter/nf_flow_table_ip.c

@@ -34,28 +34,20 @@ static int nf_flow_state_check(struct flow_offload *flow, int proto,
 	return 0;
 }
 
-static int nf_flow_nat_ip_tcp(struct sk_buff *skb, unsigned int thoff,
-			      __be32 addr, __be32 new_addr)
+static void nf_flow_nat_ip_tcp(struct sk_buff *skb, unsigned int thoff,
+			       __be32 addr, __be32 new_addr)
 {
 	struct tcphdr *tcph;
 
-	if (skb_try_make_writable(skb, thoff + sizeof(*tcph)))
-		return -1;
-
 	tcph = (void *)(skb_network_header(skb) + thoff);
 	inet_proto_csum_replace4(&tcph->check, skb, addr, new_addr, true);
-
-	return 0;
 }
 
-static int nf_flow_nat_ip_udp(struct sk_buff *skb, unsigned int thoff,
-			      __be32 addr, __be32 new_addr)
+static void nf_flow_nat_ip_udp(struct sk_buff *skb, unsigned int thoff,
+			       __be32 addr, __be32 new_addr)
 {
 	struct udphdr *udph;
 
-	if (skb_try_make_writable(skb, thoff + sizeof(*udph)))
-		return -1;
-
 	udph = (void *)(skb_network_header(skb) + thoff);
 	if (udph->check || skb->ip_summed == CHECKSUM_PARTIAL) {
 		inet_proto_csum_replace4(&udph->check, skb, addr,
@@ -63,31 +55,25 @@ static int nf_flow_nat_ip_udp(struct sk_buff *skb, unsigned int thoff,
 		if (!udph->check)
 			udph->check = CSUM_MANGLED_0;
 	}
-
-	return 0;
 }
 
-static int nf_flow_nat_ip_l4proto(struct sk_buff *skb, struct iphdr *iph,
-				  unsigned int thoff, __be32 addr,
-				  __be32 new_addr)
+static void nf_flow_nat_ip_l4proto(struct sk_buff *skb, struct iphdr *iph,
+				   unsigned int thoff, __be32 addr,
+				   __be32 new_addr)
 {
 	switch (iph->protocol) {
 	case IPPROTO_TCP:
-		if (nf_flow_nat_ip_tcp(skb, thoff, addr, new_addr) < 0)
-			return NF_DROP;
+		nf_flow_nat_ip_tcp(skb, thoff, addr, new_addr);
 		break;
 	case IPPROTO_UDP:
-		if (nf_flow_nat_ip_udp(skb, thoff, addr, new_addr) < 0)
-			return NF_DROP;
+		nf_flow_nat_ip_udp(skb, thoff, addr, new_addr);
 		break;
 	}
-
-	return 0;
 }
 
-static int nf_flow_snat_ip(const struct flow_offload *flow, struct sk_buff *skb,
-			   struct iphdr *iph, unsigned int thoff,
-			   enum flow_offload_tuple_dir dir)
+static void nf_flow_snat_ip(const struct flow_offload *flow,
+			    struct sk_buff *skb, struct iphdr *iph,
+			    unsigned int thoff, enum flow_offload_tuple_dir dir)
 {
 	__be32 addr, new_addr;
 
@@ -102,17 +88,15 @@ static int nf_flow_snat_ip(const struct flow_offload *flow, struct sk_buff *skb,
 		new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v4.s_addr;
 		iph->daddr = new_addr;
 		break;
-	default:
-		return -1;
 	}
 	csum_replace4(&iph->check, addr, new_addr);
 
-	return nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
+	nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
 }
 
-static int nf_flow_dnat_ip(const struct flow_offload *flow, struct sk_buff *skb,
-			   struct iphdr *iph, unsigned int thoff,
-			   enum flow_offload_tuple_dir dir)
+static void nf_flow_dnat_ip(const struct flow_offload *flow,
+			    struct sk_buff *skb, struct iphdr *iph,
+			    unsigned int thoff, enum flow_offload_tuple_dir dir)
 {
 	__be32 addr, new_addr;
 
@@ -127,31 +111,24 @@ static int nf_flow_dnat_ip(const struct flow_offload *flow, struct sk_buff *skb,
 		new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v4.s_addr;
 		iph->saddr = new_addr;
 		break;
-	default:
-		return -1;
 	}
 	csum_replace4(&iph->check, addr, new_addr);
 
-	return nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
+	nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
 }
 
-static int nf_flow_nat_ip(const struct flow_offload *flow, struct sk_buff *skb,
-			  unsigned int thoff, enum flow_offload_tuple_dir dir)
+static void nf_flow_nat_ip(const struct flow_offload *flow, struct sk_buff *skb,
+			  unsigned int thoff, enum flow_offload_tuple_dir dir,
+			  struct iphdr *iph)
 {
-	struct iphdr *iph = ip_hdr(skb);
-
-	if (test_bit(NF_FLOW_SNAT, &flow->flags) &&
-	    (nf_flow_snat_port(flow, skb, thoff, iph->protocol, dir) < 0 ||
-	     nf_flow_snat_ip(flow, skb, ip_hdr(skb), thoff, dir) < 0))
-		return -1;
-
-	iph = ip_hdr(skb);
-	if (test_bit(NF_FLOW_DNAT, &flow->flags) &&
-	    (nf_flow_dnat_port(flow, skb, thoff, iph->protocol, dir) < 0 ||
-	     nf_flow_dnat_ip(flow, skb, ip_hdr(skb), thoff, dir) < 0))
-		return -1;
-
-	return 0;
+	if (test_bit(NF_FLOW_SNAT, &flow->flags)) {
+		nf_flow_snat_port(flow, skb, thoff, iph->protocol, dir);
+		nf_flow_snat_ip(flow, skb, iph, thoff, dir);
+	}
+	if (test_bit(NF_FLOW_DNAT, &flow->flags)) {
+		nf_flow_dnat_port(flow, skb, thoff, iph->protocol, dir);
+		nf_flow_dnat_ip(flow, skb, iph, thoff, dir);
+	}
 }
 
 static bool ip_has_options(unsigned int thoff)
@@ -160,10 +137,10 @@ static bool ip_has_options(unsigned int thoff)
 }
 
 static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
-			    struct flow_offload_tuple *tuple)
+			    struct flow_offload_tuple *tuple, u32 *hdrsize)
 {
-	unsigned int thoff, hdrsize;
 	struct flow_ports *ports;
+	unsigned int thoff;
 	struct iphdr *iph;
 
 	if (!pskb_may_pull(skb, sizeof(*iph)))
@@ -178,10 +155,10 @@ static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
 
 	switch (iph->protocol) {
 	case IPPROTO_TCP:
-		hdrsize = sizeof(struct tcphdr);
+		*hdrsize = sizeof(struct tcphdr);
 		break;
 	case IPPROTO_UDP:
-		hdrsize = sizeof(struct udphdr);
+		*hdrsize = sizeof(struct udphdr);
 		break;
 	default:
 		return -1;
@@ -191,7 +168,7 @@ static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
 		return -1;
 
 	thoff = iph->ihl * 4;
-	if (!pskb_may_pull(skb, thoff + hdrsize))
+	if (!pskb_may_pull(skb, thoff + *hdrsize))
 		return -1;
 
 	iph = ip_hdr(skb);
@@ -220,14 +197,6 @@ static bool nf_flow_exceeds_mtu(const struct sk_buff *skb, unsigned int mtu)
 	return true;
 }
 
-static int nf_flow_offload_dst_check(struct dst_entry *dst)
-{
-	if (unlikely(dst_xfrm(dst)))
-		return dst_check(dst, 0) ? 0 : -1;
-
-	return 0;
-}
-
 static unsigned int nf_flow_xmit_xfrm(struct sk_buff *skb,
 				      const struct nf_hook_state *state,
 				      struct dst_entry *dst)
@@ -252,11 +221,12 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
 	unsigned int thoff;
 	struct iphdr *iph;
 	__be32 nexthop;
+	u32 hdrsize;
 
 	if (skb->protocol != htons(ETH_P_IP))
 		return NF_ACCEPT;
 
-	if (nf_flow_tuple_ip(skb, state->in, &tuple) < 0)
+	if (nf_flow_tuple_ip(skb, state->in, &tuple, &hdrsize) < 0)
 		return NF_ACCEPT;
 
 	tuplehash = flow_offload_lookup(flow_table, &tuple);
@@ -271,24 +241,24 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
 	if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu)))
 		return NF_ACCEPT;
 
-	if (skb_try_make_writable(skb, sizeof(*iph)))
-		return NF_DROP;
-
-	thoff = ip_hdr(skb)->ihl * 4;
-	if (nf_flow_state_check(flow, ip_hdr(skb)->protocol, skb, thoff))
+	iph = ip_hdr(skb);
+	thoff = iph->ihl * 4;
+	if (nf_flow_state_check(flow, iph->protocol, skb, thoff))
 		return NF_ACCEPT;
 
-	flow_offload_refresh(flow_table, flow);
-
-	if (nf_flow_offload_dst_check(&rt->dst)) {
+	if (!dst_check(&rt->dst, 0)) {
 		flow_offload_teardown(flow);
 		return NF_ACCEPT;
 	}
 
-	if (nf_flow_nat_ip(flow, skb, thoff, dir) < 0)
+	if (skb_try_make_writable(skb, thoff + hdrsize))
 		return NF_DROP;
 
+	flow_offload_refresh(flow_table, flow);
+
 	iph = ip_hdr(skb);
+	nf_flow_nat_ip(flow, skb, thoff, dir, iph);
+
 	ip_decrease_ttl(iph);
 	skb->tstamp = 0;
 
@@ -311,31 +281,24 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
 }
 EXPORT_SYMBOL_GPL(nf_flow_offload_ip_hook);
 
-static int nf_flow_nat_ipv6_tcp(struct sk_buff *skb, unsigned int thoff,
-				struct in6_addr *addr,
-				struct in6_addr *new_addr)
+static void nf_flow_nat_ipv6_tcp(struct sk_buff *skb, unsigned int thoff,
+				 struct in6_addr *addr,
+				 struct in6_addr *new_addr,
+				 struct ipv6hdr *ip6h)
 {
 	struct tcphdr *tcph;
 
-	if (skb_try_make_writable(skb, thoff + sizeof(*tcph)))
-		return -1;
-
 	tcph = (void *)(skb_network_header(skb) + thoff);
 	inet_proto_csum_replace16(&tcph->check, skb, addr->s6_addr32,
 				  new_addr->s6_addr32, true);
-
-	return 0;
 }
 
-static int nf_flow_nat_ipv6_udp(struct sk_buff *skb, unsigned int thoff,
-				struct in6_addr *addr,
-				struct in6_addr *new_addr)
+static void nf_flow_nat_ipv6_udp(struct sk_buff *skb, unsigned int thoff,
+				 struct in6_addr *addr,
+				 struct in6_addr *new_addr)
 {
 	struct udphdr *udph;
 
-	if (skb_try_make_writable(skb, thoff + sizeof(*udph)))
-		return -1;
-
 	udph = (void *)(skb_network_header(skb) + thoff);
 	if (udph->check || skb->ip_summed == CHECKSUM_PARTIAL) {
 		inet_proto_csum_replace16(&udph->check, skb, addr->s6_addr32,
@@ -343,32 +306,26 @@ static int nf_flow_nat_ipv6_udp(struct sk_buff *skb, unsigned int thoff,
 		if (!udph->check)
 			udph->check = CSUM_MANGLED_0;
 	}
-
-	return 0;
 }
 
-static int nf_flow_nat_ipv6_l4proto(struct sk_buff *skb, struct ipv6hdr *ip6h,
-				    unsigned int thoff, struct in6_addr *addr,
-				    struct in6_addr *new_addr)
+static void nf_flow_nat_ipv6_l4proto(struct sk_buff *skb, struct ipv6hdr *ip6h,
+				     unsigned int thoff, struct in6_addr *addr,
+				     struct in6_addr *new_addr)
 {
 	switch (ip6h->nexthdr) {
 	case IPPROTO_TCP:
-		if (nf_flow_nat_ipv6_tcp(skb, thoff, addr, new_addr) < 0)
-			return NF_DROP;
+		nf_flow_nat_ipv6_tcp(skb, thoff, addr, new_addr, ip6h);
 		break;
 	case IPPROTO_UDP:
-		if (nf_flow_nat_ipv6_udp(skb, thoff, addr, new_addr) < 0)
-			return NF_DROP;
+		nf_flow_nat_ipv6_udp(skb, thoff, addr, new_addr);
 		break;
 	}
-
-	return 0;
 }
 
-static int nf_flow_snat_ipv6(const struct flow_offload *flow,
-			     struct sk_buff *skb, struct ipv6hdr *ip6h,
-			     unsigned int thoff,
-			     enum flow_offload_tuple_dir dir)
+static void nf_flow_snat_ipv6(const struct flow_offload *flow,
+			      struct sk_buff *skb, struct ipv6hdr *ip6h,
+			      unsigned int thoff,
+			      enum flow_offload_tuple_dir dir)
 {
 	struct in6_addr addr, new_addr;
 
@@ -383,17 +340,15 @@ static int nf_flow_snat_ipv6(const struct flow_offload *flow,
 		new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v6;
 		ip6h->daddr = new_addr;
 		break;
-	default:
-		return -1;
 	}
 
-	return nf_flow_nat_ipv6_l4proto(skb, ip6h, thoff, &addr, &new_addr);
+	nf_flow_nat_ipv6_l4proto(skb, ip6h, thoff, &addr, &new_addr);
 }
 
-static int nf_flow_dnat_ipv6(const struct flow_offload *flow,
-			     struct sk_buff *skb, struct ipv6hdr *ip6h,
-			     unsigned int thoff,
-			     enum flow_offload_tuple_dir dir)
+static void nf_flow_dnat_ipv6(const struct flow_offload *flow,
+			      struct sk_buff *skb, struct ipv6hdr *ip6h,
+			      unsigned int thoff,
+			      enum flow_offload_tuple_dir dir)
 {
 	struct in6_addr addr, new_addr;
 
@@ -408,40 +363,34 @@ static int nf_flow_dnat_ipv6(const struct flow_offload *flow,
 		new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v6;
 		ip6h->saddr = new_addr;
 		break;
-	default:
-		return -1;
 	}
 
-	return nf_flow_nat_ipv6_l4proto(skb, ip6h, thoff, &addr, &new_addr);
+	nf_flow_nat_ipv6_l4proto(skb, ip6h, thoff, &addr, &new_addr);
 }
 
-static int nf_flow_nat_ipv6(const struct flow_offload *flow,
-			    struct sk_buff *skb,
-			    enum flow_offload_tuple_dir dir)
+static void nf_flow_nat_ipv6(const struct flow_offload *flow,
+			     struct sk_buff *skb,
+			     enum flow_offload_tuple_dir dir,
+			     struct ipv6hdr *ip6h)
 {
-	struct ipv6hdr *ip6h = ipv6_hdr(skb);
 	unsigned int thoff = sizeof(*ip6h);
 
-	if (test_bit(NF_FLOW_SNAT, &flow->flags) &&
-	    (nf_flow_snat_port(flow, skb, thoff, ip6h->nexthdr, dir) < 0 ||
-	     nf_flow_snat_ipv6(flow, skb, ipv6_hdr(skb), thoff, dir) < 0))
-		return -1;
-
-	ip6h = ipv6_hdr(skb);
-	if (test_bit(NF_FLOW_DNAT, &flow->flags) &&
-	    (nf_flow_dnat_port(flow, skb, thoff, ip6h->nexthdr, dir) < 0 ||
-	     nf_flow_dnat_ipv6(flow, skb, ipv6_hdr(skb), thoff, dir) < 0))
-		return -1;
-
-	return 0;
+	if (test_bit(NF_FLOW_SNAT, &flow->flags)) {
+		nf_flow_snat_port(flow, skb, thoff, ip6h->nexthdr, dir);
+		nf_flow_snat_ipv6(flow, skb, ip6h, thoff, dir);
+	}
+	if (test_bit(NF_FLOW_DNAT, &flow->flags)) {
+		nf_flow_dnat_port(flow, skb, thoff, ip6h->nexthdr, dir);
+		nf_flow_dnat_ipv6(flow, skb, ip6h, thoff, dir);
+	}
 }
 
 static int nf_flow_tuple_ipv6(struct sk_buff *skb, const struct net_device *dev,
-			      struct flow_offload_tuple *tuple)
+			      struct flow_offload_tuple *tuple, u32 *hdrsize)
 {
-	unsigned int thoff, hdrsize;
 	struct flow_ports *ports;
 	struct ipv6hdr *ip6h;
+	unsigned int thoff;
 
 	if (!pskb_may_pull(skb, sizeof(*ip6h)))
 		return -1;
@@ -450,10 +399,10 @@ static int nf_flow_tuple_ipv6(struct sk_buff *skb, const struct net_device *dev,
 
 	switch (ip6h->nexthdr) {
 	case IPPROTO_TCP:
-		hdrsize = sizeof(struct tcphdr);
+		*hdrsize = sizeof(struct tcphdr);
 		break;
 	case IPPROTO_UDP:
-		hdrsize = sizeof(struct udphdr);
+		*hdrsize = sizeof(struct udphdr);
 		break;
 	default:
 		return -1;
@@ -463,7 +412,7 @@ static int nf_flow_tuple_ipv6(struct sk_buff *skb, const struct net_device *dev,
 		return -1;
 
 	thoff = sizeof(*ip6h);
-	if (!pskb_may_pull(skb, thoff + hdrsize))
+	if (!pskb_may_pull(skb, thoff + *hdrsize))
 		return -1;
 
 	ip6h = ipv6_hdr(skb);
@@ -493,11 +442,12 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
 	struct net_device *outdev;
 	struct ipv6hdr *ip6h;
 	struct rt6_info *rt;
+	u32 hdrsize;
 
 	if (skb->protocol != htons(ETH_P_IPV6))
 		return NF_ACCEPT;
 
-	if (nf_flow_tuple_ipv6(skb, state->in, &tuple) < 0)
+	if (nf_flow_tuple_ipv6(skb, state->in, &tuple, &hdrsize) < 0)
 		return NF_ACCEPT;
 
 	tuplehash = flow_offload_lookup(flow_table, &tuple);
@@ -516,20 +466,19 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
 				sizeof(*ip6h)))
 		return NF_ACCEPT;
 
-	flow_offload_refresh(flow_table, flow);
-
-	if (nf_flow_offload_dst_check(&rt->dst)) {
+	if (!dst_check(&rt->dst, 0)) {
 		flow_offload_teardown(flow);
 		return NF_ACCEPT;
 	}
 
-	if (skb_try_make_writable(skb, sizeof(*ip6h)))
+	if (skb_try_make_writable(skb, sizeof(*ip6h) + hdrsize))
 		return NF_DROP;
 
-	if (nf_flow_nat_ipv6(flow, skb, dir) < 0)
-		return NF_DROP;
+	flow_offload_refresh(flow_table, flow);
 
 	ip6h = ipv6_hdr(skb);
+	nf_flow_nat_ipv6(flow, skb, dir, ip6h);
+
 	ip6h->hop_limit--;
 	skb->tstamp = 0;
 

net/netfilter/nf_flow_table_offload.c

@@ -13,7 +13,9 @@
 #include <net/netfilter/nf_conntrack_core.h>
 #include <net/netfilter/nf_conntrack_tuple.h>
 
-static struct workqueue_struct *nf_flow_offload_wq;
+static struct workqueue_struct *nf_flow_offload_add_wq;
+static struct workqueue_struct *nf_flow_offload_del_wq;
+static struct workqueue_struct *nf_flow_offload_stats_wq;
 
 struct flow_offload_work {
 	struct list_head	list;
@@ -826,7 +828,12 @@ static void flow_offload_work_handler(struct work_struct *work)
 
 static void flow_offload_queue_work(struct flow_offload_work *offload)
 {
-	queue_work(nf_flow_offload_wq, &offload->work);
+	if (offload->cmd == FLOW_CLS_REPLACE)
+		queue_work(nf_flow_offload_add_wq, &offload->work);
+	else if (offload->cmd == FLOW_CLS_DESTROY)
+		queue_work(nf_flow_offload_del_wq, &offload->work);
+	else
+		queue_work(nf_flow_offload_stats_wq, &offload->work);
 }
 
 static struct flow_offload_work *
@@ -898,8 +905,11 @@ void nf_flow_offload_stats(struct nf_flowtable *flowtable,
 
 void nf_flow_table_offload_flush(struct nf_flowtable *flowtable)
 {
-	if (nf_flowtable_hw_offload(flowtable))
-		flush_workqueue(nf_flow_offload_wq);
+	if (nf_flowtable_hw_offload(flowtable)) {
+		flush_workqueue(nf_flow_offload_add_wq);
+		flush_workqueue(nf_flow_offload_del_wq);
+		flush_workqueue(nf_flow_offload_stats_wq);
+	}
 }
 
 static int nf_flow_table_block_setup(struct nf_flowtable *flowtable,
@@ -1011,15 +1021,33 @@ EXPORT_SYMBOL_GPL(nf_flow_table_offload_setup);
 
 int nf_flow_table_offload_init(void)
 {
-	nf_flow_offload_wq  = alloc_workqueue("nf_flow_table_offload",
-					      WQ_UNBOUND, 0);
-	if (!nf_flow_offload_wq)
+	nf_flow_offload_add_wq  = alloc_workqueue("nf_ft_offload_add",
+						  WQ_UNBOUND | WQ_SYSFS, 0);
+	if (!nf_flow_offload_add_wq)
 		return -ENOMEM;
 
+	nf_flow_offload_del_wq  = alloc_workqueue("nf_ft_offload_del",
+						  WQ_UNBOUND | WQ_SYSFS, 0);
+	if (!nf_flow_offload_del_wq)
+		goto err_del_wq;
+
+	nf_flow_offload_stats_wq  = alloc_workqueue("nf_ft_offload_stats",
+						    WQ_UNBOUND | WQ_SYSFS, 0);
+	if (!nf_flow_offload_stats_wq)
+		goto err_stats_wq;
+
 	return 0;
+
+err_stats_wq:
+	destroy_workqueue(nf_flow_offload_del_wq);
+err_del_wq:
+	destroy_workqueue(nf_flow_offload_add_wq);
+	return -ENOMEM;
 }
 
 void nf_flow_table_offload_exit(void)
 {
-	destroy_workqueue(nf_flow_offload_wq);
+	destroy_workqueue(nf_flow_offload_add_wq);
+	destroy_workqueue(nf_flow_offload_del_wq);
+	destroy_workqueue(nf_flow_offload_stats_wq);
 }

net/netfilter/nf_tables_api.c

@@ -900,6 +900,12 @@ static void nf_tables_table_disable(struct net *net, struct nft_table *table)
 	nft_table_disable(net, table, 0);
 }
 
+enum {
+	NFT_TABLE_STATE_UNCHANGED	= 0,
+	NFT_TABLE_STATE_DORMANT,
+	NFT_TABLE_STATE_WAKEUP
+};
+
 static int nf_tables_updtable(struct nft_ctx *ctx)
 {
 	struct nft_trans *trans;
@@ -929,19 +935,17 @@ static int nf_tables_updtable(struct nft_ctx *ctx)
 
 	if ((flags & NFT_TABLE_F_DORMANT) &&
 	    !(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
-		nft_trans_table_enable(trans) = false;
+		nft_trans_table_state(trans) = NFT_TABLE_STATE_DORMANT;
 	} else if (!(flags & NFT_TABLE_F_DORMANT) &&
 		   ctx->table->flags & NFT_TABLE_F_DORMANT) {
-		ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
 		ret = nf_tables_table_enable(ctx->net, ctx->table);
 		if (ret >= 0)
-			nft_trans_table_enable(trans) = true;
-		else
-			ctx->table->flags |= NFT_TABLE_F_DORMANT;
+			nft_trans_table_state(trans) = NFT_TABLE_STATE_WAKEUP;
 	}
 	if (ret < 0)
 		goto err;
 
+	nft_trans_table_flags(trans) = flags;
 	nft_trans_table_update(trans) = true;
 	list_add_tail(&trans->list, &ctx->net->nft.commit_list);
 	return 0;
@@ -8068,11 +8072,10 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
 		switch (trans->msg_type) {
 		case NFT_MSG_NEWTABLE:
 			if (nft_trans_table_update(trans)) {
-				if (!nft_trans_table_enable(trans)) {
-					nf_tables_table_disable(net,
-								trans->ctx.table);
-					trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
-				}
+				if (nft_trans_table_state(trans) == NFT_TABLE_STATE_DORMANT)
+					nf_tables_table_disable(net, trans->ctx.table);
+
+				trans->ctx.table->flags = nft_trans_table_flags(trans);
 			} else {
 				nft_clear(net, trans->ctx.table);
 			}
@@ -8283,11 +8286,9 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
 		switch (trans->msg_type) {
 		case NFT_MSG_NEWTABLE:
 			if (nft_trans_table_update(trans)) {
-				if (nft_trans_table_enable(trans)) {
-					nf_tables_table_disable(net,
-								trans->ctx.table);
-					trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
-				}
+				if (nft_trans_table_state(trans) == NFT_TABLE_STATE_WAKEUP)
+					nf_tables_table_disable(net, trans->ctx.table);
+
 				nft_trans_destroy(trans);
 			} else {
 				list_del_rcu(&trans->ctx.table->list);
@@ -8557,6 +8558,7 @@ static int nf_tables_check_loops(const struct nft_ctx *ctx,
 							data->verdict.chain);
 				if (err < 0)
 					return err;
+				break;
 			default:
 				break;
 			}

net/netfilter/nft_ct.c

@@ -527,6 +527,7 @@ static void __nft_ct_set_destroy(const struct nft_ctx *ctx, struct nft_ct *priv)
 	case NFT_CT_ZONE:
 		if (--nft_ct_pcpu_template_refcnt == 0)
 			nft_ct_tmpl_put_pcpu();
+		break;
 #endif
 	default:
 		break;