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

Pablo Neira Ayuso says:

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

1) Remove indirection and use nf_ct_get() instead from nfnetlink_log
   and nfnetlink_queue, from Florian Westphal.

2) Add weighted random twos choice least-connection scheduling for IPVS,
   from Darby Payne.

3) Add a __hash placeholder in the flow tuple structure to identify
   the field to be included in the rhashtable key hash calculation.

4) Add a new nft_parse_register_load() and nft_parse_register_store()
   to consolidate register load and store in the core.

5) Statify nft_parse_register() since it has no more module clients.

6) Remove redundant assignment in nft_cmp, from Colin Ian King.

* git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next:
  netfilter: nftables: remove redundant assignment of variable err
  netfilter: nftables: statify nft_parse_register()
  netfilter: nftables: add nft_parse_register_store() and use it
  netfilter: nftables: add nft_parse_register_load() and use it
  netfilter: flowtable: add hash offset field to tuple
  ipvs: add weighted random twos choice algorithm
  netfilter: ctnetlink: remove get_ct indirection
====================

Link: https://lore.kernel.org/r/20210206015005.23037-1-pablo@netfilter.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

include/linux/netfilter.h

@@ -463,8 +463,6 @@ extern struct nf_ct_hook __rcu *nf_ct_hook;
 struct nlattr;
 
 struct nfnl_ct_hook {
-	struct nf_conn *(*get_ct)(const struct sk_buff *skb,
-				  enum ip_conntrack_info *ctinfo);
 	size_t (*build_size)(const struct nf_conn *ct);
 	int (*build)(struct sk_buff *skb, struct nf_conn *ct,
 		     enum ip_conntrack_info ctinfo,

include/net/netfilter/nf_flow_table.h

@@ -107,6 +107,10 @@ struct flow_offload_tuple {
 
 	u8				l3proto;
 	u8				l4proto;
+
+	/* All members above are keys for lookups, see flow_offload_hash(). */
+	struct { }			__hash;
+
 	u8				dir;
 
 	u16				mtu;

include/net/netfilter/nf_tables.h

@@ -200,14 +200,13 @@ static inline enum nft_registers nft_type_to_reg(enum nft_data_types type)
 }
 
 int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest);
-unsigned int nft_parse_register(const struct nlattr *attr);
 int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg);
 
-int nft_validate_register_load(enum nft_registers reg, unsigned int len);
-int nft_validate_register_store(const struct nft_ctx *ctx,
-				enum nft_registers reg,
-				const struct nft_data *data,
-				enum nft_data_types type, unsigned int len);
+int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len);
+int nft_parse_register_store(const struct nft_ctx *ctx,
+			     const struct nlattr *attr, u8 *dreg,
+			     const struct nft_data *data,
+			     enum nft_data_types type, unsigned int len);
 
 /**
  *	struct nft_userdata - user defined data associated with an object

include/net/netfilter/nf_tables_core.h

@@ -26,21 +26,21 @@ void nf_tables_core_module_exit(void);
 struct nft_bitwise_fast_expr {
 	u32			mask;
 	u32			xor;
-	enum nft_registers	sreg:8;
-	enum nft_registers	dreg:8;
+	u8			sreg;
+	u8			dreg;
 };
 
 struct nft_cmp_fast_expr {
 	u32			data;
 	u32			mask;
-	enum nft_registers	sreg:8;
+	u8			sreg;
 	u8			len;
 	bool			inv;
 };
 
 struct nft_immediate_expr {
 	struct nft_data		data;
-	enum nft_registers	dreg:8;
+	u8			dreg;
 	u8			dlen;
 };
 
@@ -60,14 +60,14 @@ struct nft_payload {
 	enum nft_payload_bases	base:8;
 	u8			offset;
 	u8			len;
-	enum nft_registers	dreg:8;
+	u8			dreg;
 };
 
 struct nft_payload_set {
 	enum nft_payload_bases	base:8;
 	u8			offset;
 	u8			len;
-	enum nft_registers	sreg:8;
+	u8			sreg;
 	u8			csum_type;
 	u8			csum_offset;
 	u8			csum_flags;

include/net/netfilter/nft_fib.h

@@ -5,7 +5,7 @@
 #include <net/netfilter/nf_tables.h>
 
 struct nft_fib {
-	enum nft_registers	dreg:8;
+	u8			dreg;
 	u8			result;
 	u32			flags;
 };

include/net/netfilter/nft_meta.h

@@ -7,8 +7,8 @@
 struct nft_meta {
 	enum nft_meta_keys	key:8;
 	union {
-		enum nft_registers	dreg:8;
-		enum nft_registers	sreg:8;
+		u8		dreg;
+		u8		sreg;
 	};
 };
 

net/bridge/netfilter/nft_meta_bridge.c

@@ -87,9 +87,8 @@ static int nft_meta_bridge_get_init(const struct nft_ctx *ctx,
 		return nft_meta_get_init(ctx, expr, tb);
 	}
 
-	priv->dreg = nft_parse_register(tb[NFTA_META_DREG]);
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, len);
+	return nft_parse_register_store(ctx, tb[NFTA_META_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE, len);
 }
 
 static struct nft_expr_type nft_meta_bridge_type;

net/ipv4/netfilter/nft_dup_ipv4.c

@@ -13,8 +13,8 @@
 #include <net/netfilter/ipv4/nf_dup_ipv4.h>
 
 struct nft_dup_ipv4 {
-	enum nft_registers	sreg_addr:8;
-	enum nft_registers	sreg_dev:8;
+	u8	sreg_addr;
+	u8	sreg_dev;
 };
 
 static void nft_dup_ipv4_eval(const struct nft_expr *expr,
@@ -40,16 +40,16 @@ static int nft_dup_ipv4_init(const struct nft_ctx *ctx,
 	if (tb[NFTA_DUP_SREG_ADDR] == NULL)
 		return -EINVAL;
 
-	priv->sreg_addr = nft_parse_register(tb[NFTA_DUP_SREG_ADDR]);
-	err = nft_validate_register_load(priv->sreg_addr, sizeof(struct in_addr));
+	err = nft_parse_register_load(tb[NFTA_DUP_SREG_ADDR], &priv->sreg_addr,
+				      sizeof(struct in_addr));
 	if (err < 0)
 		return err;
 
-	if (tb[NFTA_DUP_SREG_DEV] != NULL) {
-		priv->sreg_dev = nft_parse_register(tb[NFTA_DUP_SREG_DEV]);
-		return nft_validate_register_load(priv->sreg_dev, sizeof(int));
-	}
-	return 0;
+	if (tb[NFTA_DUP_SREG_DEV])
+		err = nft_parse_register_load(tb[NFTA_DUP_SREG_DEV],
+					      &priv->sreg_dev, sizeof(int));
+
+	return err;
 }
 
 static int nft_dup_ipv4_dump(struct sk_buff *skb, const struct nft_expr *expr)

net/ipv6/netfilter/nft_dup_ipv6.c

@@ -13,8 +13,8 @@
 #include <net/netfilter/ipv6/nf_dup_ipv6.h>
 
 struct nft_dup_ipv6 {
-	enum nft_registers	sreg_addr:8;
-	enum nft_registers	sreg_dev:8;
+	u8	sreg_addr;
+	u8	sreg_dev;
 };
 
 static void nft_dup_ipv6_eval(const struct nft_expr *expr,
@@ -38,16 +38,16 @@ static int nft_dup_ipv6_init(const struct nft_ctx *ctx,
 	if (tb[NFTA_DUP_SREG_ADDR] == NULL)
 		return -EINVAL;
 
-	priv->sreg_addr = nft_parse_register(tb[NFTA_DUP_SREG_ADDR]);
-	err = nft_validate_register_load(priv->sreg_addr, sizeof(struct in6_addr));
+	err = nft_parse_register_load(tb[NFTA_DUP_SREG_ADDR], &priv->sreg_addr,
+				      sizeof(struct in6_addr));
 	if (err < 0)
 		return err;
 
-	if (tb[NFTA_DUP_SREG_DEV] != NULL) {
-		priv->sreg_dev = nft_parse_register(tb[NFTA_DUP_SREG_DEV]);
-		return nft_validate_register_load(priv->sreg_dev, sizeof(int));
-	}
-	return 0;
+	if (tb[NFTA_DUP_SREG_DEV])
+		err = nft_parse_register_load(tb[NFTA_DUP_SREG_DEV],
+					      &priv->sreg_dev, sizeof(int));
+
+	return err;
 }
 
 static int nft_dup_ipv6_dump(struct sk_buff *skb, const struct nft_expr *expr)

net/netfilter/ipvs/Kconfig

@@ -271,6 +271,17 @@ config	IP_VS_NQ
 	  If you want to compile it in kernel, say Y. To compile it as a
 	  module, choose M here. If unsure, say N.
 
+config	IP_VS_TWOS
+	tristate "weighted random twos choice least-connection scheduling"
+	help
+	  The weighted random twos choice least-connection scheduling
+	  algorithm picks two random real servers and directs network
+	  connections to the server with the least active connections
+	  normalized by the server weight.
+
+	  If you want to compile it in kernel, say Y. To compile it as a
+	  module, choose M here. If unsure, say N.
+
 comment 'IPVS SH scheduler'
 
 config IP_VS_SH_TAB_BITS

net/netfilter/ipvs/Makefile

@@ -36,6 +36,7 @@ obj-$(CONFIG_IP_VS_SH) += ip_vs_sh.o
 obj-$(CONFIG_IP_VS_MH) += ip_vs_mh.o
 obj-$(CONFIG_IP_VS_SED) += ip_vs_sed.o
 obj-$(CONFIG_IP_VS_NQ) += ip_vs_nq.o
+obj-$(CONFIG_IP_VS_TWOS) += ip_vs_twos.o
 
 # IPVS application helpers
 obj-$(CONFIG_IP_VS_FTP) += ip_vs_ftp.o

net/netfilter/ipvs/ip_vs_twos.c

+// SPDX-License-Identifier: GPL-2.0-or-later
+/* IPVS:        Power of Twos Choice Scheduling module
+ *
+ * Authors:     Darby Payne <darby.payne@applovin.com>
+ */
+
+#define KMSG_COMPONENT "IPVS"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/random.h>
+
+#include <net/ip_vs.h>
+
+/*    Power of Twos Choice scheduling, algorithm originally described by
+ *    Michael Mitzenmacher.
+ *
+ *    Randomly picks two destinations and picks the one with the least
+ *    amount of connections
+ *
+ *    The algorithm calculates a few variables
+ *    - total_weight = sum of all weights
+ *    - rweight1 = random number between [0,total_weight]
+ *    - rweight2 = random number between [0,total_weight]
+ *
+ *    For each destination
+ *      decrement rweight1 and rweight2 by the destination weight
+ *      pick choice1 when rweight1 is <= 0
+ *      pick choice2 when rweight2 is <= 0
+ *
+ *    Return choice2 if choice2 has less connections than choice 1 normalized
+ *    by weight
+ *
+ * References
+ * ----------
+ *
+ * [Mitzenmacher 2016]
+ *    The Power of Two Random Choices: A Survey of Techniques and Results
+ *    Michael Mitzenmacher, Andrea W. Richa y, Ramesh Sitaraman
+ *    http://www.eecs.harvard.edu/~michaelm/NEWWORK/postscripts/twosurvey.pdf
+ *
+ */
+static struct ip_vs_dest *ip_vs_twos_schedule(struct ip_vs_service *svc,
+					      const struct sk_buff *skb,
+					      struct ip_vs_iphdr *iph)
+{
+	struct ip_vs_dest *dest, *choice1 = NULL, *choice2 = NULL;
+	int rweight1, rweight2, weight1 = -1, weight2 = -1, overhead1 = 0;
+	int overhead2, total_weight = 0, weight;
+
+	IP_VS_DBG(6, "%s(): Scheduling...\n", __func__);
+
+	/* Generate a random weight between [0,sum of all weights) */
+	list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
+		if (!(dest->flags & IP_VS_DEST_F_OVERLOAD)) {
+			weight = atomic_read(&dest->weight);
+			if (weight > 0) {
+				total_weight += weight;
+				choice1 = dest;
+			}
+		}
+	}
+
+	if (!choice1) {
+		ip_vs_scheduler_err(svc, "no destination available");
+		return NULL;
+	}
+
+	/* Add 1 to total_weight so that the random weights are inclusive
+	 * from 0 to total_weight
+	 */
+	total_weight += 1;
+	rweight1 = prandom_u32() % total_weight;
+	rweight2 = prandom_u32() % total_weight;
+
+	/* Pick two weighted servers */
+	list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
+		if (dest->flags & IP_VS_DEST_F_OVERLOAD)
+			continue;
+
+		weight = atomic_read(&dest->weight);
+		if (weight <= 0)
+			continue;
+
+		rweight1 -= weight;
+		rweight2 -= weight;
+
+		if (rweight1 <= 0 && weight1 == -1) {
+			choice1 = dest;
+			weight1 = weight;
+			overhead1 = ip_vs_dest_conn_overhead(dest);
+		}
+
+		if (rweight2 <= 0 && weight2 == -1) {
+			choice2 = dest;
+			weight2 = weight;
+			overhead2 = ip_vs_dest_conn_overhead(dest);
+		}
+
+		if (weight1 != -1 && weight2 != -1)
+			goto nextstage;
+	}
+
+nextstage:
+	if (choice2 && (weight2 * overhead1) > (weight1 * overhead2))
+		choice1 = choice2;
+
+	IP_VS_DBG_BUF(6, "twos: server %s:%u conns %d refcnt %d weight %d\n",
+		      IP_VS_DBG_ADDR(choice1->af, &choice1->addr),
+		      ntohs(choice1->port), atomic_read(&choice1->activeconns),
+		      refcount_read(&choice1->refcnt),
+		      atomic_read(&choice1->weight));
+
+	return choice1;
+}
+
+static struct ip_vs_scheduler ip_vs_twos_scheduler = {
+	.name = "twos",
+	.refcnt = ATOMIC_INIT(0),
+	.module = THIS_MODULE,
+	.n_list = LIST_HEAD_INIT(ip_vs_twos_scheduler.n_list),
+	.schedule = ip_vs_twos_schedule,
+};
+
+static int __init ip_vs_twos_init(void)
+{
+	return register_ip_vs_scheduler(&ip_vs_twos_scheduler);
+}
+
+static void __exit ip_vs_twos_cleanup(void)
+{
+	unregister_ip_vs_scheduler(&ip_vs_twos_scheduler);
+	synchronize_rcu();
+}
+
+module_init(ip_vs_twos_init);
+module_exit(ip_vs_twos_cleanup);
+MODULE_LICENSE("GPL");

net/netfilter/nf_conntrack_netlink.c

@@ -2686,12 +2686,6 @@ ctnetlink_glue_build_size(const struct nf_conn *ct)
 	       ;
 }
 
-static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb,
-					     enum ip_conntrack_info *ctinfo)
-{
-	return nf_ct_get(skb, ctinfo);
-}
-
 static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
 {
 	const struct nf_conntrack_zone *zone;
@@ -2925,7 +2919,6 @@ static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,
 }
 
 static struct nfnl_ct_hook ctnetlink_glue_hook = {
-	.get_ct		= ctnetlink_glue_get_ct,
 	.build_size	= ctnetlink_glue_build_size,
 	.build		= ctnetlink_glue_build,
 	.parse		= ctnetlink_glue_parse,

net/netfilter/nf_flow_table_core.c

@@ -191,14 +191,14 @@ static u32 flow_offload_hash(const void *data, u32 len, u32 seed)
 {
 	const struct flow_offload_tuple *tuple = data;
 
-	return jhash(tuple, offsetof(struct flow_offload_tuple, dir), seed);
+	return jhash(tuple, offsetof(struct flow_offload_tuple, __hash), seed);
 }
 
 static u32 flow_offload_hash_obj(const void *data, u32 len, u32 seed)
 {
 	const struct flow_offload_tuple_rhash *tuplehash = data;
 
-	return jhash(&tuplehash->tuple, offsetof(struct flow_offload_tuple, dir), seed);
+	return jhash(&tuplehash->tuple, offsetof(struct flow_offload_tuple, __hash), seed);
 }
 
 static int flow_offload_hash_cmp(struct rhashtable_compare_arg *arg,
@@ -207,7 +207,7 @@ static int flow_offload_hash_cmp(struct rhashtable_compare_arg *arg,
 	const struct flow_offload_tuple *tuple = arg->key;
 	const struct flow_offload_tuple_rhash *x = ptr;
 
-	if (memcmp(&x->tuple, tuple, offsetof(struct flow_offload_tuple, dir)))
+	if (memcmp(&x->tuple, tuple, offsetof(struct flow_offload_tuple, __hash)))
 		return 1;
 
 	return 0;

net/netfilter/nf_tables_api.c

@@ -4438,6 +4438,12 @@ static int nf_tables_delset(struct net *net, struct sock *nlsk,
 	return nft_delset(&ctx, set);
 }
 
+static int nft_validate_register_store(const struct nft_ctx *ctx,
+				       enum nft_registers reg,
+				       const struct nft_data *data,
+				       enum nft_data_types type,
+				       unsigned int len);
+
 static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
 					struct nft_set *set,
 					const struct nft_set_iter *iter,
@@ -8588,7 +8594,7 @@ EXPORT_SYMBOL_GPL(nft_parse_u32_check);
  *	Registers used to be 128 bit wide, these register numbers will be
  *	mapped to the corresponding 32 bit register numbers.
  */
-unsigned int nft_parse_register(const struct nlattr *attr)
+static unsigned int nft_parse_register(const struct nlattr *attr)
 {
 	unsigned int reg;
 
@@ -8600,7 +8606,6 @@ unsigned int nft_parse_register(const struct nlattr *attr)
 		return reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
 	}
 }
-EXPORT_SYMBOL_GPL(nft_parse_register);
 
 /**
  *	nft_dump_register - dump a register value to a netlink attribute
@@ -8633,7 +8638,7 @@ EXPORT_SYMBOL_GPL(nft_dump_register);
  * 	Validate that the input register is one of the general purpose
  * 	registers and that the length of the load is within the bounds.
  */
-int nft_validate_register_load(enum nft_registers reg, unsigned int len)
+static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
 {
 	if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
 		return -EINVAL;
@@ -8644,7 +8649,21 @@ int nft_validate_register_load(enum nft_registers reg, unsigned int len)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(nft_validate_register_load);
+
+int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
+{
+	u32 reg;
+	int err;
+
+	reg = nft_parse_register(attr);
+	err = nft_validate_register_load(reg, len);
+	if (err < 0)
+		return err;
+
+	*sreg = reg;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nft_parse_register_load);
 
 /**
  *	nft_validate_register_store - validate an expressions' register store
@@ -8660,10 +8679,11 @@ EXPORT_SYMBOL_GPL(nft_validate_register_load);
  * 	A value of NULL for the data means that its runtime gathered
  * 	data.
  */
-int nft_validate_register_store(const struct nft_ctx *ctx,
-				enum nft_registers reg,
-				const struct nft_data *data,
-				enum nft_data_types type, unsigned int len)
+static int nft_validate_register_store(const struct nft_ctx *ctx,
+				       enum nft_registers reg,
+				       const struct nft_data *data,
+				       enum nft_data_types type,
+				       unsigned int len)
 {
 	int err;
 
@@ -8695,7 +8715,24 @@ int nft_validate_register_store(const struct nft_ctx *ctx,
 		return 0;
 	}
 }
-EXPORT_SYMBOL_GPL(nft_validate_register_store);
+
+int nft_parse_register_store(const struct nft_ctx *ctx,
+			     const struct nlattr *attr, u8 *dreg,
+			     const struct nft_data *data,
+			     enum nft_data_types type, unsigned int len)
+{
+	int err;
+	u32 reg;
+
+	reg = nft_parse_register(attr);
+	err = nft_validate_register_store(ctx, reg, data, type, len);
+	if (err < 0)
+		return err;
+
+	*dreg = reg;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nft_parse_register_store);
 
 static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
 	[NFTA_VERDICT_CODE]	= { .type = NLA_U32 },

net/netfilter/nfnetlink_log.c

@@ -43,6 +43,10 @@
 #include "../bridge/br_private.h"
 #endif
 
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
+#include <net/netfilter/nf_conntrack.h>
+#endif
+
 #define NFULNL_COPY_DISABLED	0xff
 #define NFULNL_NLBUFSIZ_DEFAULT	NLMSG_GOODSIZE
 #define NFULNL_TIMEOUT_DEFAULT 	100	/* every second */
@@ -733,14 +737,16 @@ nfulnl_log_packet(struct net *net,
 		size += nla_total_size(sizeof(u_int32_t));
 	if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL)
 		size += nla_total_size(sizeof(u_int32_t));
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
 	if (inst->flags & NFULNL_CFG_F_CONNTRACK) {
 		nfnl_ct = rcu_dereference(nfnl_ct_hook);
 		if (nfnl_ct != NULL) {
-			ct = nfnl_ct->get_ct(skb, &ctinfo);
+			ct = nf_ct_get(skb, &ctinfo);
 			if (ct != NULL)
 				size += nfnl_ct->build_size(ct);
 		}
 	}
+#endif
 	if (pf == NFPROTO_NETDEV || pf == NFPROTO_BRIDGE)
 		size += nfulnl_get_bridge_size(skb);
 

net/netfilter/nfnetlink_queue.c

@@ -444,13 +444,15 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
 
 	nfnl_ct = rcu_dereference(nfnl_ct_hook);
 
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
 	if (queue->flags & NFQA_CFG_F_CONNTRACK) {
 		if (nfnl_ct != NULL) {
-			ct = nfnl_ct->get_ct(entskb, &ctinfo);
+			ct = nf_ct_get(entskb, &ctinfo);
 			if (ct != NULL)
 				size += nfnl_ct->build_size(ct);
 		}
 	}
+#endif
 
 	if (queue->flags & NFQA_CFG_F_UID_GID) {
 		size += (nla_total_size(sizeof(u_int32_t))	/* uid */
@@ -1104,9 +1106,10 @@ static struct nf_conn *nfqnl_ct_parse(struct nfnl_ct_hook *nfnl_ct,
 				      struct nf_queue_entry *entry,
 				      enum ip_conntrack_info *ctinfo)
 {
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
 	struct nf_conn *ct;
 
-	ct = nfnl_ct->get_ct(entry->skb, ctinfo);
+	ct = nf_ct_get(entry->skb, ctinfo);
 	if (ct == NULL)
 		return NULL;
 
@@ -1118,6 +1121,9 @@ static struct nf_conn *nfqnl_ct_parse(struct nfnl_ct_hook *nfnl_ct,
 				      NETLINK_CB(entry->skb).portid,
 				      nlmsg_report(nlh));
 	return ct;
+#else
+	return NULL;
+#endif
 }
 
 static int nfqa_parse_bridge(struct nf_queue_entry *entry,

net/netfilter/nft_bitwise.c

@@ -16,8 +16,8 @@
 #include <net/netfilter/nf_tables_offload.h>
 
 struct nft_bitwise {
-	enum nft_registers	sreg:8;
-	enum nft_registers	dreg:8;
+	u8			sreg;
+	u8			dreg;
 	enum nft_bitwise_ops	op:8;
 	u8			len;
 	struct nft_data		mask;
@@ -169,14 +169,14 @@ static int nft_bitwise_init(const struct nft_ctx *ctx,
 
 	priv->len = len;
 
-	priv->sreg = nft_parse_register(tb[NFTA_BITWISE_SREG]);
-	err = nft_validate_register_load(priv->sreg, priv->len);
+	err = nft_parse_register_load(tb[NFTA_BITWISE_SREG], &priv->sreg,
+				      priv->len);
 	if (err < 0)
 		return err;
 
-	priv->dreg = nft_parse_register(tb[NFTA_BITWISE_DREG]);
-	err = nft_validate_register_store(ctx, priv->dreg, NULL,
-					  NFT_DATA_VALUE, priv->len);
+	err = nft_parse_register_store(ctx, tb[NFTA_BITWISE_DREG],
+				       &priv->dreg, NULL, NFT_DATA_VALUE,
+				       priv->len);
 	if (err < 0)
 		return err;
 
@@ -315,14 +315,13 @@ static int nft_bitwise_fast_init(const struct nft_ctx *ctx,
 	struct nft_bitwise_fast_expr *priv = nft_expr_priv(expr);
 	int err;
 
-	priv->sreg = nft_parse_register(tb[NFTA_BITWISE_SREG]);
-	err = nft_validate_register_load(priv->sreg, sizeof(u32));
+	err = nft_parse_register_load(tb[NFTA_BITWISE_SREG], &priv->sreg,
+				      sizeof(u32));
 	if (err < 0)
 		return err;
 
-	priv->dreg = nft_parse_register(tb[NFTA_BITWISE_DREG]);
-	err = nft_validate_register_store(ctx, priv->dreg, NULL,
-					  NFT_DATA_VALUE, sizeof(u32));
+	err = nft_parse_register_store(ctx, tb[NFTA_BITWISE_DREG], &priv->dreg,
+				       NULL, NFT_DATA_VALUE, sizeof(u32));
 	if (err < 0)
 		return err;
 

net/netfilter/nft_byteorder.c

@@ -16,8 +16,8 @@
 #include <net/netfilter/nf_tables.h>
 
 struct nft_byteorder {
-	enum nft_registers	sreg:8;
-	enum nft_registers	dreg:8;
+	u8			sreg;
+	u8			dreg;
 	enum nft_byteorder_ops	op:8;
 	u8			len;
 	u8			size;
@@ -131,20 +131,20 @@ static int nft_byteorder_init(const struct nft_ctx *ctx,
 		return -EINVAL;
 	}
 
-	priv->sreg = nft_parse_register(tb[NFTA_BYTEORDER_SREG]);
 	err = nft_parse_u32_check(tb[NFTA_BYTEORDER_LEN], U8_MAX, &len);
 	if (err < 0)
 		return err;
 
 	priv->len = len;
 
-	err = nft_validate_register_load(priv->sreg, priv->len);
+	err = nft_parse_register_load(tb[NFTA_BYTEORDER_SREG], &priv->sreg,
+				      priv->len);
 	if (err < 0)
 		return err;
 
-	priv->dreg = nft_parse_register(tb[NFTA_BYTEORDER_DREG]);
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, priv->len);
+	return nft_parse_register_store(ctx, tb[NFTA_BYTEORDER_DREG],
+					&priv->dreg, NULL, NFT_DATA_VALUE,
+					priv->len);
 }
 
 static int nft_byteorder_dump(struct sk_buff *skb, const struct nft_expr *expr)

net/netfilter/nft_cmp.c

@@ -18,7 +18,7 @@
 
 struct nft_cmp_expr {
 	struct nft_data		data;
-	enum nft_registers	sreg:8;
+	u8			sreg;
 	u8			len;
 	enum nft_cmp_ops	op:8;
 };
@@ -87,8 +87,7 @@ static int nft_cmp_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
 		return err;
 	}
 
-	priv->sreg = nft_parse_register(tb[NFTA_CMP_SREG]);
-	err = nft_validate_register_load(priv->sreg, desc.len);
+	err = nft_parse_register_load(tb[NFTA_CMP_SREG], &priv->sreg, desc.len);
 	if (err < 0)
 		return err;
 
@@ -174,8 +173,7 @@ static int nft_cmp_fast_init(const struct nft_ctx *ctx,
 	if (err < 0)
 		return err;
 
-	priv->sreg = nft_parse_register(tb[NFTA_CMP_SREG]);
-	err = nft_validate_register_load(priv->sreg, desc.len);
+	err = nft_parse_register_load(tb[NFTA_CMP_SREG], &priv->sreg, desc.len);
 	if (err < 0)
 		return err;
 
@@ -268,10 +266,8 @@ nft_cmp_select_ops(const struct nft_ctx *ctx, const struct nlattr * const tb[])
 	if (err < 0)
 		return ERR_PTR(err);
 
-	if (desc.type != NFT_DATA_VALUE) {
-		err = -EINVAL;
+	if (desc.type != NFT_DATA_VALUE)
 		goto err1;
-	}
 
 	if (desc.len <= sizeof(u32) && (op == NFT_CMP_EQ || op == NFT_CMP_NEQ))
 		return &nft_cmp_fast_ops;

net/netfilter/nft_ct.c

@@ -27,8 +27,8 @@ struct nft_ct {
 	enum nft_ct_keys	key:8;
 	enum ip_conntrack_dir	dir:8;
 	union {
-		enum nft_registers	dreg:8;
-		enum nft_registers	sreg:8;
+		u8		dreg;
+		u8		sreg;
 	};
 };
 
@@ -498,9 +498,8 @@ static int nft_ct_get_init(const struct nft_ctx *ctx,
 		}
 	}
 
-	priv->dreg = nft_parse_register(tb[NFTA_CT_DREG]);
-	err = nft_validate_register_store(ctx, priv->dreg, NULL,
-					  NFT_DATA_VALUE, len);
+	err = nft_parse_register_store(ctx, tb[NFTA_CT_DREG], &priv->dreg, NULL,
+				       NFT_DATA_VALUE, len);
 	if (err < 0)
 		return err;
 
@@ -600,8 +599,7 @@ static int nft_ct_set_init(const struct nft_ctx *ctx,
 		}
 	}
 
-	priv->sreg = nft_parse_register(tb[NFTA_CT_SREG]);
-	err = nft_validate_register_load(priv->sreg, len);
+	err = nft_parse_register_load(tb[NFTA_CT_SREG], &priv->sreg, len);
 	if (err < 0)
 		goto err1;
 

net/netfilter/nft_dup_netdev.c

@@ -14,7 +14,7 @@
 #include <net/netfilter/nf_dup_netdev.h>
 
 struct nft_dup_netdev {
-	enum nft_registers	sreg_dev:8;
+	u8	sreg_dev;
 };
 
 static void nft_dup_netdev_eval(const struct nft_expr *expr,
@@ -40,8 +40,8 @@ static int nft_dup_netdev_init(const struct nft_ctx *ctx,
 	if (tb[NFTA_DUP_SREG_DEV] == NULL)
 		return -EINVAL;
 
-	priv->sreg_dev = nft_parse_register(tb[NFTA_DUP_SREG_DEV]);
-	return nft_validate_register_load(priv->sreg_dev, sizeof(int));
+	return nft_parse_register_load(tb[NFTA_DUP_SREG_DEV], &priv->sreg_dev,
+				       sizeof(int));
 }
 
 static int nft_dup_netdev_dump(struct sk_buff *skb, const struct nft_expr *expr)

net/netfilter/nft_dynset.c

@@ -16,8 +16,8 @@ struct nft_dynset {
 	struct nft_set			*set;
 	struct nft_set_ext_tmpl		tmpl;
 	enum nft_dynset_ops		op:8;
-	enum nft_registers		sreg_key:8;
-	enum nft_registers		sreg_data:8;
+	u8				sreg_key;
+	u8				sreg_data;
 	bool				invert;
 	bool				expr;
 	u8				num_exprs;
@@ -219,8 +219,8 @@ static int nft_dynset_init(const struct nft_ctx *ctx,
 			return err;
 	}
 
-	priv->sreg_key = nft_parse_register(tb[NFTA_DYNSET_SREG_KEY]);
-	err = nft_validate_register_load(priv->sreg_key, set->klen);
+	err = nft_parse_register_load(tb[NFTA_DYNSET_SREG_KEY], &priv->sreg_key,
+				      set->klen);
 	if (err < 0)
 		return err;
 
@@ -230,8 +230,8 @@ static int nft_dynset_init(const struct nft_ctx *ctx,
 		if (set->dtype == NFT_DATA_VERDICT)
 			return -EOPNOTSUPP;
 
-		priv->sreg_data = nft_parse_register(tb[NFTA_DYNSET_SREG_DATA]);
-		err = nft_validate_register_load(priv->sreg_data, set->dlen);
+		err = nft_parse_register_load(tb[NFTA_DYNSET_SREG_DATA],
+					      &priv->sreg_data, set->dlen);
 		if (err < 0)
 			return err;
 	} else if (set->flags & NFT_SET_MAP)

net/netfilter/nft_exthdr.c

@@ -19,8 +19,8 @@ struct nft_exthdr {
 	u8			offset;
 	u8			len;
 	u8			op;
-	enum nft_registers	dreg:8;
-	enum nft_registers	sreg:8;
+	u8			dreg;
+	u8			sreg;
 	u8			flags;
 };
 
@@ -350,12 +350,12 @@ static int nft_exthdr_init(const struct nft_ctx *ctx,
 	priv->type   = nla_get_u8(tb[NFTA_EXTHDR_TYPE]);
 	priv->offset = offset;
 	priv->len    = len;
-	priv->dreg   = nft_parse_register(tb[NFTA_EXTHDR_DREG]);
 	priv->flags  = flags;
 	priv->op     = op;
 
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, priv->len);
+	return nft_parse_register_store(ctx, tb[NFTA_EXTHDR_DREG],
+					&priv->dreg, NULL, NFT_DATA_VALUE,
+					priv->len);
 }
 
 static int nft_exthdr_tcp_set_init(const struct nft_ctx *ctx,
@@ -400,11 +400,11 @@ static int nft_exthdr_tcp_set_init(const struct nft_ctx *ctx,
 	priv->type   = nla_get_u8(tb[NFTA_EXTHDR_TYPE]);
 	priv->offset = offset;
 	priv->len    = len;
-	priv->sreg   = nft_parse_register(tb[NFTA_EXTHDR_SREG]);
 	priv->flags  = flags;
 	priv->op     = op;
 
-	return nft_validate_register_load(priv->sreg, priv->len);
+	return nft_parse_register_load(tb[NFTA_EXTHDR_SREG], &priv->sreg,
+				       priv->len);
 }
 
 static int nft_exthdr_ipv4_init(const struct nft_ctx *ctx,

net/netfilter/nft_fib.c

@@ -86,7 +86,6 @@ int nft_fib_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
 		return -EINVAL;
 
 	priv->result = ntohl(nla_get_be32(tb[NFTA_FIB_RESULT]));
-	priv->dreg = nft_parse_register(tb[NFTA_FIB_DREG]);
 
 	switch (priv->result) {
 	case NFT_FIB_RESULT_OIF:
@@ -106,8 +105,8 @@ int nft_fib_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
 		return -EINVAL;
 	}
 
-	err = nft_validate_register_store(ctx, priv->dreg, NULL,
-					  NFT_DATA_VALUE, len);
+	err = nft_parse_register_store(ctx, tb[NFTA_FIB_DREG], &priv->dreg,
+				       NULL, NFT_DATA_VALUE, len);
 	if (err < 0)
 		return err;
 

net/netfilter/nft_fwd_netdev.c

@@ -18,7 +18,7 @@
 #include <net/ip.h>
 
 struct nft_fwd_netdev {
-	enum nft_registers	sreg_dev:8;
+	u8	sreg_dev;
 };
 
 static void nft_fwd_netdev_eval(const struct nft_expr *expr,
@@ -50,8 +50,8 @@ static int nft_fwd_netdev_init(const struct nft_ctx *ctx,
 	if (tb[NFTA_FWD_SREG_DEV] == NULL)
 		return -EINVAL;
 
-	priv->sreg_dev = nft_parse_register(tb[NFTA_FWD_SREG_DEV]);
-	return nft_validate_register_load(priv->sreg_dev, sizeof(int));
+	return nft_parse_register_load(tb[NFTA_FWD_SREG_DEV], &priv->sreg_dev,
+				       sizeof(int));
 }
 
 static int nft_fwd_netdev_dump(struct sk_buff *skb, const struct nft_expr *expr)
@@ -78,8 +78,8 @@ static int nft_fwd_netdev_offload(struct nft_offload_ctx *ctx,
 }
 
 struct nft_fwd_neigh {
-	enum nft_registers	sreg_dev:8;
-	enum nft_registers	sreg_addr:8;
+	u8			sreg_dev;
+	u8			sreg_addr;
 	u8			nfproto;
 };
 
@@ -157,8 +157,6 @@ static int nft_fwd_neigh_init(const struct nft_ctx *ctx,
 	    !tb[NFTA_FWD_NFPROTO])
 		return -EINVAL;
 
-	priv->sreg_dev = nft_parse_register(tb[NFTA_FWD_SREG_DEV]);
-	priv->sreg_addr = nft_parse_register(tb[NFTA_FWD_SREG_ADDR]);
 	priv->nfproto = ntohl(nla_get_be32(tb[NFTA_FWD_NFPROTO]));
 
 	switch (priv->nfproto) {
@@ -172,11 +170,13 @@ static int nft_fwd_neigh_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
-	err = nft_validate_register_load(priv->sreg_dev, sizeof(int));
+	err = nft_parse_register_load(tb[NFTA_FWD_SREG_DEV], &priv->sreg_dev,
+				      sizeof(int));
 	if (err < 0)
 		return err;
 
-	return nft_validate_register_load(priv->sreg_addr, addr_len);
+	return nft_parse_register_load(tb[NFTA_FWD_SREG_ADDR], &priv->sreg_addr,
+				       addr_len);
 }
 
 static int nft_fwd_neigh_dump(struct sk_buff *skb, const struct nft_expr *expr)

net/netfilter/nft_hash.c

@@ -14,8 +14,8 @@
 #include <linux/jhash.h>
 
 struct nft_jhash {
-	enum nft_registers      sreg:8;
-	enum nft_registers      dreg:8;
+	u8			sreg;
+	u8			dreg;
 	u8			len;
 	bool			autogen_seed:1;
 	u32			modulus;
@@ -38,7 +38,7 @@ static void nft_jhash_eval(const struct nft_expr *expr,
 }
 
 struct nft_symhash {
-	enum nft_registers      dreg:8;
+	u8			dreg;
 	u32			modulus;
 	u32			offset;
 };
@@ -83,9 +83,6 @@ static int nft_jhash_init(const struct nft_ctx *ctx,
 	if (tb[NFTA_HASH_OFFSET])
 		priv->offset = ntohl(nla_get_be32(tb[NFTA_HASH_OFFSET]));
 
-	priv->sreg = nft_parse_register(tb[NFTA_HASH_SREG]);
-	priv->dreg = nft_parse_register(tb[NFTA_HASH_DREG]);
-
 	err = nft_parse_u32_check(tb[NFTA_HASH_LEN], U8_MAX, &len);
 	if (err < 0)
 		return err;
@@ -94,6 +91,10 @@ static int nft_jhash_init(const struct nft_ctx *ctx,
 
 	priv->len = len;
 
+	err = nft_parse_register_load(tb[NFTA_HASH_SREG], &priv->sreg, len);
+	if (err < 0)
+		return err;
+
 	priv->modulus = ntohl(nla_get_be32(tb[NFTA_HASH_MODULUS]));
 	if (priv->modulus < 1)
 		return -ERANGE;
@@ -108,9 +109,8 @@ static int nft_jhash_init(const struct nft_ctx *ctx,
 		get_random_bytes(&priv->seed, sizeof(priv->seed));
 	}
 
-	return nft_validate_register_load(priv->sreg, len) &&
-	       nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, sizeof(u32));
+	return nft_parse_register_store(ctx, tb[NFTA_HASH_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE, sizeof(u32));
 }
 
 static int nft_symhash_init(const struct nft_ctx *ctx,
@@ -126,8 +126,6 @@ static int nft_symhash_init(const struct nft_ctx *ctx,
 	if (tb[NFTA_HASH_OFFSET])
 		priv->offset = ntohl(nla_get_be32(tb[NFTA_HASH_OFFSET]));
 
-	priv->dreg = nft_parse_register(tb[NFTA_HASH_DREG]);
-
 	priv->modulus = ntohl(nla_get_be32(tb[NFTA_HASH_MODULUS]));
 	if (priv->modulus < 1)
 		return -ERANGE;
@@ -135,8 +133,9 @@ static int nft_symhash_init(const struct nft_ctx *ctx,
 	if (priv->offset + priv->modulus - 1 < priv->offset)
 		return -EOVERFLOW;
 
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, sizeof(u32));
+	return nft_parse_register_store(ctx, tb[NFTA_HASH_DREG],
+					&priv->dreg, NULL, NFT_DATA_VALUE,
+					sizeof(u32));
 }
 
 static int nft_jhash_dump(struct sk_buff *skb,

net/netfilter/nft_immediate.c

@@ -48,9 +48,9 @@ static int nft_immediate_init(const struct nft_ctx *ctx,
 
 	priv->dlen = desc.len;
 
-	priv->dreg = nft_parse_register(tb[NFTA_IMMEDIATE_DREG]);
-	err = nft_validate_register_store(ctx, priv->dreg, &priv->data,
-					  desc.type, desc.len);
+	err = nft_parse_register_store(ctx, tb[NFTA_IMMEDIATE_DREG],
+				       &priv->dreg, &priv->data, desc.type,
+				       desc.len);
 	if (err < 0)
 		goto err1;
 

net/netfilter/nft_lookup.c

@@ -17,8 +17,8 @@
 
 struct nft_lookup {
 	struct nft_set			*set;
-	enum nft_registers		sreg:8;
-	enum nft_registers		dreg:8;
+	u8				sreg;
+	u8				dreg;
 	bool				invert;
 	struct nft_set_binding		binding;
 };
@@ -76,8 +76,8 @@ static int nft_lookup_init(const struct nft_ctx *ctx,
 	if (IS_ERR(set))
 		return PTR_ERR(set);
 
-	priv->sreg = nft_parse_register(tb[NFTA_LOOKUP_SREG]);
-	err = nft_validate_register_load(priv->sreg, set->klen);
+	err = nft_parse_register_load(tb[NFTA_LOOKUP_SREG], &priv->sreg,
+				      set->klen);
 	if (err < 0)
 		return err;
 
@@ -100,9 +100,9 @@ static int nft_lookup_init(const struct nft_ctx *ctx,
 		if (!(set->flags & NFT_SET_MAP))
 			return -EINVAL;
 
-		priv->dreg = nft_parse_register(tb[NFTA_LOOKUP_DREG]);
-		err = nft_validate_register_store(ctx, priv->dreg, NULL,
-						  set->dtype, set->dlen);
+		err = nft_parse_register_store(ctx, tb[NFTA_LOOKUP_DREG],
+					       &priv->dreg, NULL, set->dtype,
+					       set->dlen);
 		if (err < 0)
 			return err;
 	} else if (set->flags & NFT_SET_MAP)

net/netfilter/nft_masq.c

@@ -15,8 +15,8 @@
 
 struct nft_masq {
 	u32			flags;
-	enum nft_registers      sreg_proto_min:8;
-	enum nft_registers      sreg_proto_max:8;
+	u8			sreg_proto_min;
+	u8			sreg_proto_max;
 };
 
 static const struct nla_policy nft_masq_policy[NFTA_MASQ_MAX + 1] = {
@@ -54,19 +54,15 @@ static int nft_masq_init(const struct nft_ctx *ctx,
 	}
 
 	if (tb[NFTA_MASQ_REG_PROTO_MIN]) {
-		priv->sreg_proto_min =
-			nft_parse_register(tb[NFTA_MASQ_REG_PROTO_MIN]);
-
-		err = nft_validate_register_load(priv->sreg_proto_min, plen);
+		err = nft_parse_register_load(tb[NFTA_MASQ_REG_PROTO_MIN],
+					      &priv->sreg_proto_min, plen);
 		if (err < 0)
 			return err;
 
 		if (tb[NFTA_MASQ_REG_PROTO_MAX]) {
-			priv->sreg_proto_max =
-				nft_parse_register(tb[NFTA_MASQ_REG_PROTO_MAX]);
-
-			err = nft_validate_register_load(priv->sreg_proto_max,
-							 plen);
+			err = nft_parse_register_load(tb[NFTA_MASQ_REG_PROTO_MAX],
+						      &priv->sreg_proto_max,
+						      plen);
 			if (err < 0)
 				return err;
 		} else {

net/netfilter/nft_meta.c

@@ -535,9 +535,8 @@ int nft_meta_get_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
-	priv->dreg = nft_parse_register(tb[NFTA_META_DREG]);
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, len);
+	return nft_parse_register_store(ctx, tb[NFTA_META_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE, len);
 }
 EXPORT_SYMBOL_GPL(nft_meta_get_init);
 
@@ -661,8 +660,7 @@ int nft_meta_set_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
-	priv->sreg = nft_parse_register(tb[NFTA_META_SREG]);
-	err = nft_validate_register_load(priv->sreg, len);
+	err = nft_parse_register_load(tb[NFTA_META_SREG], &priv->sreg, len);
 	if (err < 0)
 		return err;
 

net/netfilter/nft_nat.c

@@ -21,10 +21,10 @@
 #include <net/ip.h>
 
 struct nft_nat {
-	enum nft_registers      sreg_addr_min:8;
-	enum nft_registers      sreg_addr_max:8;
-	enum nft_registers      sreg_proto_min:8;
-	enum nft_registers      sreg_proto_max:8;
+	u8			sreg_addr_min;
+	u8			sreg_addr_max;
+	u8			sreg_proto_min;
+	u8			sreg_proto_max;
 	enum nf_nat_manip_type  type:8;
 	u8			family;
 	u16			flags;
@@ -206,18 +206,15 @@ static int nft_nat_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
 	priv->family = family;
 
 	if (tb[NFTA_NAT_REG_ADDR_MIN]) {
-		priv->sreg_addr_min =
-			nft_parse_register(tb[NFTA_NAT_REG_ADDR_MIN]);
-		err = nft_validate_register_load(priv->sreg_addr_min, alen);
+		err = nft_parse_register_load(tb[NFTA_NAT_REG_ADDR_MIN],
+					      &priv->sreg_addr_min, alen);
 		if (err < 0)
 			return err;
 
 		if (tb[NFTA_NAT_REG_ADDR_MAX]) {
-			priv->sreg_addr_max =
-				nft_parse_register(tb[NFTA_NAT_REG_ADDR_MAX]);
-
-			err = nft_validate_register_load(priv->sreg_addr_max,
-							 alen);
+			err = nft_parse_register_load(tb[NFTA_NAT_REG_ADDR_MAX],
+						      &priv->sreg_addr_max,
+						      alen);
 			if (err < 0)
 				return err;
 		} else {
@@ -229,19 +226,15 @@ static int nft_nat_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
 
 	plen = sizeof_field(struct nf_nat_range, min_addr.all);
 	if (tb[NFTA_NAT_REG_PROTO_MIN]) {
-		priv->sreg_proto_min =
-			nft_parse_register(tb[NFTA_NAT_REG_PROTO_MIN]);
-
-		err = nft_validate_register_load(priv->sreg_proto_min, plen);
+		err = nft_parse_register_load(tb[NFTA_NAT_REG_PROTO_MIN],
+					      &priv->sreg_proto_min, plen);
 		if (err < 0)
 			return err;
 
 		if (tb[NFTA_NAT_REG_PROTO_MAX]) {
-			priv->sreg_proto_max =
-				nft_parse_register(tb[NFTA_NAT_REG_PROTO_MAX]);
-
-			err = nft_validate_register_load(priv->sreg_proto_max,
-							 plen);
+			err = nft_parse_register_load(tb[NFTA_NAT_REG_PROTO_MAX],
+						      &priv->sreg_proto_max,
+						      plen);
 			if (err < 0)
 				return err;
 		} else {

net/netfilter/nft_numgen.c

@@ -16,7 +16,7 @@
 static DEFINE_PER_CPU(struct rnd_state, nft_numgen_prandom_state);
 
 struct nft_ng_inc {
-	enum nft_registers      dreg:8;
+	u8			dreg;
 	u32			modulus;
 	atomic_t		counter;
 	u32			offset;
@@ -66,11 +66,10 @@ static int nft_ng_inc_init(const struct nft_ctx *ctx,
 	if (priv->offset + priv->modulus - 1 < priv->offset)
 		return -EOVERFLOW;
 
-	priv->dreg = nft_parse_register(tb[NFTA_NG_DREG]);
 	atomic_set(&priv->counter, priv->modulus - 1);
 
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, sizeof(u32));
+	return nft_parse_register_store(ctx, tb[NFTA_NG_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE, sizeof(u32));
 }
 
 static int nft_ng_dump(struct sk_buff *skb, enum nft_registers dreg,
@@ -100,7 +99,7 @@ static int nft_ng_inc_dump(struct sk_buff *skb, const struct nft_expr *expr)
 }
 
 struct nft_ng_random {
-	enum nft_registers      dreg:8;
+	u8			dreg;
 	u32			modulus;
 	u32			offset;
 };
@@ -140,10 +139,8 @@ static int nft_ng_random_init(const struct nft_ctx *ctx,
 
 	prandom_init_once(&nft_numgen_prandom_state);
 
-	priv->dreg = nft_parse_register(tb[NFTA_NG_DREG]);
-
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, sizeof(u32));
+	return nft_parse_register_store(ctx, tb[NFTA_NG_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE, sizeof(u32));
 }
 
 static int nft_ng_random_dump(struct sk_buff *skb, const struct nft_expr *expr)

net/netfilter/nft_objref.c

@@ -95,7 +95,7 @@ static const struct nft_expr_ops nft_objref_ops = {
 
 struct nft_objref_map {
 	struct nft_set		*set;
-	enum nft_registers	sreg:8;
+	u8			sreg;
 	struct nft_set_binding	binding;
 };
 
@@ -137,8 +137,8 @@ static int nft_objref_map_init(const struct nft_ctx *ctx,
 	if (!(set->flags & NFT_SET_OBJECT))
 		return -EINVAL;
 
-	priv->sreg = nft_parse_register(tb[NFTA_OBJREF_SET_SREG]);
-	err = nft_validate_register_load(priv->sreg, set->klen);
+	err = nft_parse_register_load(tb[NFTA_OBJREF_SET_SREG], &priv->sreg,
+				      set->klen);
 	if (err < 0)
 		return err;
 

net/netfilter/nft_osf.c

@@ -6,7 +6,7 @@
 #include <linux/netfilter/nfnetlink_osf.h>
 
 struct nft_osf {
-	enum nft_registers	dreg:8;
+	u8			dreg;
 	u8			ttl;
 	u32			flags;
 };
@@ -78,9 +78,9 @@ static int nft_osf_init(const struct nft_ctx *ctx,
 		priv->flags = flags;
 	}
 
-	priv->dreg = nft_parse_register(tb[NFTA_OSF_DREG]);
-	err = nft_validate_register_store(ctx, priv->dreg, NULL,
-					  NFT_DATA_VALUE, NFT_OSF_MAXGENRELEN);
+	err = nft_parse_register_store(ctx, tb[NFTA_OSF_DREG], &priv->dreg,
+				       NULL, NFT_DATA_VALUE,
+				       NFT_OSF_MAXGENRELEN);
 	if (err < 0)
 		return err;
 

net/netfilter/nft_payload.c

@@ -144,10 +144,10 @@ static int nft_payload_init(const struct nft_ctx *ctx,
 	priv->base   = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_BASE]));
 	priv->offset = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_OFFSET]));
 	priv->len    = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_LEN]));
-	priv->dreg   = nft_parse_register(tb[NFTA_PAYLOAD_DREG]);
 
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, priv->len);
+	return nft_parse_register_store(ctx, tb[NFTA_PAYLOAD_DREG],
+					&priv->dreg, NULL, NFT_DATA_VALUE,
+					priv->len);
 }
 
 static int nft_payload_dump(struct sk_buff *skb, const struct nft_expr *expr)
@@ -658,7 +658,6 @@ static int nft_payload_set_init(const struct nft_ctx *ctx,
 	priv->base        = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_BASE]));
 	priv->offset      = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_OFFSET]));
 	priv->len         = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_LEN]));
-	priv->sreg        = nft_parse_register(tb[NFTA_PAYLOAD_SREG]);
 
 	if (tb[NFTA_PAYLOAD_CSUM_TYPE])
 		priv->csum_type =
@@ -691,7 +690,8 @@ static int nft_payload_set_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
-	return nft_validate_register_load(priv->sreg, priv->len);
+	return nft_parse_register_load(tb[NFTA_PAYLOAD_SREG], &priv->sreg,
+				       priv->len);
 }
 
 static int nft_payload_set_dump(struct sk_buff *skb, const struct nft_expr *expr)

net/netfilter/nft_queue.c

@@ -19,10 +19,10 @@
 static u32 jhash_initval __read_mostly;
 
 struct nft_queue {
-	enum nft_registers	sreg_qnum:8;
-	u16			queuenum;
-	u16			queues_total;
-	u16			flags;
+	u8	sreg_qnum;
+	u16	queuenum;
+	u16	queues_total;
+	u16	flags;
 };
 
 static void nft_queue_eval(const struct nft_expr *expr,
@@ -111,8 +111,8 @@ static int nft_queue_sreg_init(const struct nft_ctx *ctx,
 	struct nft_queue *priv = nft_expr_priv(expr);
 	int err;
 
-	priv->sreg_qnum = nft_parse_register(tb[NFTA_QUEUE_SREG_QNUM]);
-	err = nft_validate_register_load(priv->sreg_qnum, sizeof(u32));
+	err = nft_parse_register_load(tb[NFTA_QUEUE_SREG_QNUM],
+				      &priv->sreg_qnum, sizeof(u32));
 	if (err < 0)
 		return err;
 

net/netfilter/nft_range.c

@@ -15,7 +15,7 @@
 struct nft_range_expr {
 	struct nft_data		data_from;
 	struct nft_data		data_to;
-	enum nft_registers	sreg:8;
+	u8			sreg;
 	u8			len;
 	enum nft_range_ops	op:8;
 };
@@ -86,8 +86,8 @@ static int nft_range_init(const struct nft_ctx *ctx, const struct nft_expr *expr
 		goto err2;
 	}
 
-	priv->sreg = nft_parse_register(tb[NFTA_RANGE_SREG]);
-	err = nft_validate_register_load(priv->sreg, desc_from.len);
+	err = nft_parse_register_load(tb[NFTA_RANGE_SREG], &priv->sreg,
+				      desc_from.len);
 	if (err < 0)
 		goto err2;
 

net/netfilter/nft_redir.c

@@ -14,8 +14,8 @@
 #include <net/netfilter/nf_tables.h>
 
 struct nft_redir {
-	enum nft_registers	sreg_proto_min:8;
-	enum nft_registers	sreg_proto_max:8;
+	u8			sreg_proto_min;
+	u8			sreg_proto_max;
 	u16			flags;
 };
 
@@ -50,19 +50,15 @@ static int nft_redir_init(const struct nft_ctx *ctx,
 
 	plen = sizeof_field(struct nf_nat_range, min_addr.all);
 	if (tb[NFTA_REDIR_REG_PROTO_MIN]) {
-		priv->sreg_proto_min =
-			nft_parse_register(tb[NFTA_REDIR_REG_PROTO_MIN]);
-
-		err = nft_validate_register_load(priv->sreg_proto_min, plen);
+		err = nft_parse_register_load(tb[NFTA_REDIR_REG_PROTO_MIN],
+					      &priv->sreg_proto_min, plen);
 		if (err < 0)
 			return err;
 
 		if (tb[NFTA_REDIR_REG_PROTO_MAX]) {
-			priv->sreg_proto_max =
-				nft_parse_register(tb[NFTA_REDIR_REG_PROTO_MAX]);
-
-			err = nft_validate_register_load(priv->sreg_proto_max,
-							 plen);
+			err = nft_parse_register_load(tb[NFTA_REDIR_REG_PROTO_MAX],
+						      &priv->sreg_proto_max,
+						      plen);
 			if (err < 0)
 				return err;
 		} else {

net/netfilter/nft_rt.c

@@ -15,7 +15,7 @@
 
 struct nft_rt {
 	enum nft_rt_keys	key:8;
-	enum nft_registers	dreg:8;
+	u8			dreg;
 };
 
 static u16 get_tcpmss(const struct nft_pktinfo *pkt, const struct dst_entry *skbdst)
@@ -141,9 +141,8 @@ static int nft_rt_get_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
-	priv->dreg = nft_parse_register(tb[NFTA_RT_DREG]);
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, len);
+	return nft_parse_register_store(ctx, tb[NFTA_RT_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE, len);
 }
 
 static int nft_rt_get_dump(struct sk_buff *skb,

net/netfilter/nft_socket.c

@@ -10,7 +10,7 @@
 struct nft_socket {
 	enum nft_socket_keys		key:8;
 	union {
-		enum nft_registers	dreg:8;
+		u8			dreg;
 	};
 };
 
@@ -133,9 +133,8 @@ static int nft_socket_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
-	priv->dreg = nft_parse_register(tb[NFTA_SOCKET_DREG]);
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, len);
+	return nft_parse_register_store(ctx, tb[NFTA_SOCKET_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE, len);
 }
 
 static int nft_socket_dump(struct sk_buff *skb,

net/netfilter/nft_tproxy.c

@@ -13,9 +13,9 @@
 #endif
 
 struct nft_tproxy {
-	enum nft_registers      sreg_addr:8;
-	enum nft_registers      sreg_port:8;
-	u8			family;
+	u8	sreg_addr;
+	u8	sreg_port;
+	u8	family;
 };
 
 static void nft_tproxy_eval_v4(const struct nft_expr *expr,
@@ -247,15 +247,15 @@ static int nft_tproxy_init(const struct nft_ctx *ctx,
 	}
 
 	if (tb[NFTA_TPROXY_REG_ADDR]) {
-		priv->sreg_addr = nft_parse_register(tb[NFTA_TPROXY_REG_ADDR]);
-		err = nft_validate_register_load(priv->sreg_addr, alen);
+		err = nft_parse_register_load(tb[NFTA_TPROXY_REG_ADDR],
+					      &priv->sreg_addr, alen);
 		if (err < 0)
 			return err;
 	}
 
 	if (tb[NFTA_TPROXY_REG_PORT]) {
-		priv->sreg_port = nft_parse_register(tb[NFTA_TPROXY_REG_PORT]);
-		err = nft_validate_register_load(priv->sreg_port, sizeof(u16));
+		err = nft_parse_register_load(tb[NFTA_TPROXY_REG_PORT],
+					      &priv->sreg_port, sizeof(u16));
 		if (err < 0)
 			return err;
 	}

net/netfilter/nft_tunnel.c

@@ -15,7 +15,7 @@
 
 struct nft_tunnel {
 	enum nft_tunnel_keys	key:8;
-	enum nft_registers	dreg:8;
+	u8			dreg;
 	enum nft_tunnel_mode	mode:8;
 };
 
@@ -93,8 +93,6 @@ static int nft_tunnel_get_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
-	priv->dreg = nft_parse_register(tb[NFTA_TUNNEL_DREG]);
-
 	if (tb[NFTA_TUNNEL_MODE]) {
 		priv->mode = ntohl(nla_get_be32(tb[NFTA_TUNNEL_MODE]));
 		if (priv->mode > NFT_TUNNEL_MODE_MAX)
@@ -103,8 +101,8 @@ static int nft_tunnel_get_init(const struct nft_ctx *ctx,
 		priv->mode = NFT_TUNNEL_MODE_NONE;
 	}
 
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, len);
+	return nft_parse_register_store(ctx, tb[NFTA_TUNNEL_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE, len);
 }
 
 static int nft_tunnel_get_dump(struct sk_buff *skb,

net/netfilter/nft_xfrm.c

@@ -24,7 +24,7 @@ static const struct nla_policy nft_xfrm_policy[NFTA_XFRM_MAX + 1] = {
 
 struct nft_xfrm {
 	enum nft_xfrm_keys	key:8;
-	enum nft_registers	dreg:8;
+	u8			dreg;
 	u8			dir;
 	u8			spnum;
 };
@@ -86,9 +86,8 @@ static int nft_xfrm_get_init(const struct nft_ctx *ctx,
 
 	priv->spnum = spnum;
 
-	priv->dreg = nft_parse_register(tb[NFTA_XFRM_DREG]);
-	return nft_validate_register_store(ctx, priv->dreg, NULL,
-					   NFT_DATA_VALUE, len);
+	return nft_parse_register_store(ctx, tb[NFTA_XFRM_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE, len);
 }
 
 /* Return true if key asks for daddr/saddr and current