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

Pablo Neira Ayuso says:

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

A final pull request, I know it's very late but this time I think it's worth a
bit of rush.

The following patchset contains Netfilter/nf_tables updates for net-next, more
specifically concatenation support and dynamic stateful expression
instantiation.

This also comes with a couple of small patches. One to fix the ebtables.h
userspace header and another to get rid of an obsolete example file in tree
that describes a nf_tables expression.

This time, I decided to paste the original descriptions. This will result in a
rather large commit description, but I think these bytes to keep.

Patrick McHardy says:

====================
netfilter: nf_tables: concatenation support

The following patches add support for concatenations, which allow multi
dimensional exact matches in O(1).

The basic idea is to split the data registers, currently consisting of
4 registers of 16 bytes each, into smaller units, 16 registers of 4
bytes each, and making sure each register store always leaves the
full 32 bit in a well defined state, meaning smaller stores will
zero the remaining bits.

Based on that, we can load multiple adjacent registers with different
values, thereby building a concatenated bigger value, and use that
value for set lookups.

Sets are changed to use variable sized extensions for their key and
data values, removing the fixed limit of 16 bytes while saving memory
if less space is needed.

As a side effect, these patches will allow some nice optimizations in
the future, like using jhash2 in nft_hash, removing the masking in
nft_cmp_fast, optimized data comparison using 32 bit word size etc.
These are not done so far however.

The patches are split up as follows:

* the first five patches add length validation to register loads and
stores to make sure we stay within bounds and prepare the validation
functions for the new addressing mode

* the next patches prepare for changing to 32 bit addressing by
introducing a struct nft_regs, which holds the verdict register as
well as the data registers. The verdict members are moved to a new
struct nft_verdict to allow to pull struct nft_data out of the stack.

* the next patches contain preparatory conversions of expressions and
sets to use 32 bit addressing

* the next patch introduces so far unused register conversion helpers
for parsing and dumping register numbers over netlink

* following is the real conversion to 32 bit addressing, consisting of
replacing struct nft_data in struct nft_regs by an array of u32s and
actually translating and validating the new register numbers.

* the final two patches add support for variable sized data items and
variable sized keys / data in set elements

The patches have been verified to work correctly with nft binaries using
both old and new addressing.
====================

Patrick McHardy says:

====================
netfilter: nf_tables: dynamic stateful expression instantiation

The following patches are the grand finale of my nf_tables set work,
using all the building blocks put in place by the previous patches
to support something like iptables hashlimit, but a lot more powerful.

Sets are extended to allow attaching expressions to set elements.
The dynset expression dynamically instantiates these expressions
based on a template when creating new set elements and evaluates
them for all new or updated set members.

In combination with concatenations this effectively creates state
tables for arbitrary combinations of keys, using the existing
expression types to maintain that state. Regular set GC takes care
of purging expired states.

We currently support two different stateful expressions, counter
and limit. Using limit as a template we can express the functionality
of hashlimit, but completely unrestricted in the combination of keys.
Using counter we can perform accounting for arbitrary flows.

The following examples from patch 5/5 show some possibilities.
Userspace syntax is still WIP, especially the listing of state
tables will most likely be seperated from normal set listings
and use a more structured format:

1. Limit the rate of new SSH connections per host, similar to iptables
hashlimit:

flow ip saddr timeout 60s \
limit 10/second \
accept

2. Account network traffic between each set of /24 networks:

flow ip saddr & 255.255.255.0 . ip daddr & 255.255.255.0 \
counter

3. Account traffic to each host per user:

flow skuid . ip daddr \
counter

4. Account traffic for each combination of source address and TCP flags:

flow ip saddr . tcp flags \
counter

The resulting set content after a Xmas-scan look like this:

{
192.168.122.1 . fin | psh | urg : counter packets 1001 bytes 40040,
192.168.122.1 . ack : counter packets 74 bytes 3848,
192.168.122.1 . psh | ack : counter packets 35 bytes 3144
}

In the future the "expressions attached to elements" will be extended
to also support user created non-stateful expressions to allow to
efficiently select beween a set of parameter sets, f.i. a set of log
statements with different prefixes based on the interface, which currently
require one rule each. This will most likely have to wait until the next
kernel version though.
====================

Signed-off-by: David S. Miller <[e-mail]>

include/linux/netfilter_bridge/ebtables.h

···
 #ifndef __LINUX_BRIDGE_EFF_H
 #define __LINUX_BRIDGE_EFF_H
 
+#include <linux/if.h>
+#include <linux/if_ether.h>
 #include <uapi/linux/netfilter_bridge/ebtables.h>
-
 
 /* return values for match() functions */
 #define EBT_MATCH 0

include/net/netfilter/nf_tables.h

···
 #ifndef _NET_NF_TABLES_H
 #define _NET_NF_TABLES_H
 
+#include <linux/module.h>
 #include <linux/list.h>
 #include <linux/netfilter.h>
 #include <linux/netfilter/nfnetlink.h>
···
 	pkt->xt.family = ops->pf;
 }
 
+/**
+ * 	struct nft_verdict - nf_tables verdict
+ *
+ * 	@code: nf_tables/netfilter verdict code
+ * 	@chain: destination chain for NFT_JUMP/NFT_GOTO
+ */
+struct nft_verdict {
+	u32				code;
+	struct nft_chain		*chain;
+};
+
 struct nft_data {
 	union {
-		u32				data[4];
-		struct {
-			u32			verdict;
-			struct nft_chain	*chain;
-		};
+		u32			data[4];
+		struct nft_verdict	verdict;
 	};
 } __attribute__((aligned(__alignof__(u64))));
 
-static inline int nft_data_cmp(const struct nft_data *d1,
-			       const struct nft_data *d2,
-			       unsigned int len)
-{
-	return memcmp(d1->data, d2->data, len);
-}
+/**
+ *	struct nft_regs - nf_tables register set
+ *
+ *	@data: data registers
+ *	@verdict: verdict register
+ *
+ *	The first four data registers alias to the verdict register.
+ */
+struct nft_regs {
+	union {
+		u32			data[20];
+		struct nft_verdict	verdict;
+	};
+};
 
-static inline void nft_data_copy(struct nft_data *dst,
-				 const struct nft_data *src)
+static inline void nft_data_copy(u32 *dst, const struct nft_data *src,
+				 unsigned int len)
 {
-	BUILD_BUG_ON(__alignof__(*dst) != __alignof__(u64));
-	*(u64 *)&dst->data[0] = *(u64 *)&src->data[0];
-	*(u64 *)&dst->data[2] = *(u64 *)&src->data[2];
+	memcpy(dst, src, len);
 }
 
 static inline void nft_data_debug(const struct nft_data *data)
···
 	unsigned int			len;
 };
 
-int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
+int nft_data_init(const struct nft_ctx *ctx,
+		  struct nft_data *data, unsigned int size,
 		  struct nft_data_desc *desc, const struct nlattr *nla);
 void nft_data_uninit(const struct nft_data *data, enum nft_data_types type);
 int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
···
 	return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1;
 }
 
-int nft_validate_input_register(enum nft_registers reg);
-int nft_validate_output_register(enum nft_registers reg);
-int nft_validate_data_load(const struct nft_ctx *ctx, enum nft_registers reg,
-			   const struct nft_data *data,
-			   enum nft_data_types type);
+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);
 
 /**
  *	struct nft_userdata - user defined data associated with an object
···
  *	@priv: element private data and extensions
  */
 struct nft_set_elem {
-	struct nft_data		key;
+	union {
+		u32		buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)];
+		struct nft_data	val;
+	} key;
 	void			*priv;
 };
 
···
  */
 struct nft_set_ops {
 	bool				(*lookup)(const struct nft_set *set,
-						  const struct nft_data *key,
+						  const u32 *key,
 						  const struct nft_set_ext **ext);
 	bool				(*update)(struct nft_set *set,
-						  const struct nft_data *key,
+						  const u32 *key,
 						  void *(*new)(struct nft_set *,
 							       const struct nft_expr *,
-							       struct nft_data []),
+							       struct nft_regs *),
 						  const struct nft_expr *expr,
-						  struct nft_data data[],
+						  struct nft_regs *regs,
 						  const struct nft_set_ext **ext);
 
 	int				(*insert)(const struct nft_set *set,
···
  *	@NFT_SET_EXT_TIMEOUT: element timeout
  *	@NFT_SET_EXT_EXPIRATION: element expiration time
  *	@NFT_SET_EXT_USERDATA: user data associated with the element
+ *	@NFT_SET_EXT_EXPR: expression assiociated with the element
  *	@NFT_SET_EXT_NUM: number of extension types
  */
 enum nft_set_extensions {
···
 	NFT_SET_EXT_TIMEOUT,
 	NFT_SET_EXT_EXPIRATION,
 	NFT_SET_EXT_USERDATA,
+	NFT_SET_EXT_EXPR,
 	NFT_SET_EXT_NUM
 };
 
···
 	return nft_set_ext(ext, NFT_SET_EXT_USERDATA);
 }
 
+static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext)
+{
+	return nft_set_ext(ext, NFT_SET_EXT_EXPR);
+}
+
 static inline bool nft_set_elem_expired(const struct nft_set_ext *ext)
 {
 	return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) &&
···
 
 void *nft_set_elem_init(const struct nft_set *set,
 			const struct nft_set_ext_tmpl *tmpl,
-			const struct nft_data *key,
-			const struct nft_data *data,
+			const u32 *key, const u32 *data,
 			u64 timeout, gfp_t gfp);
 void nft_set_elem_destroy(const struct nft_set *set, void *elem);
 
···
  *	@policy: netlink attribute policy
  *	@maxattr: highest netlink attribute number
  *	@family: address family for AF-specific types
+ *	@flags: expression type flags
  */
 struct nft_expr_type {
 	const struct nft_expr_ops	*(*select_ops)(const struct nft_ctx *,
···
 	const struct nla_policy		*policy;
 	unsigned int			maxattr;
 	u8				family;
+	u8				flags;
 };
+
+#define NFT_EXPR_STATEFUL		0x1
 
 /**
  *	struct nft_expr_ops - nf_tables expression operations
···
 struct nft_expr;
 struct nft_expr_ops {
 	void				(*eval)(const struct nft_expr *expr,
-						struct nft_data data[NFT_REG_MAX + 1],
+						struct nft_regs *regs,
 						const struct nft_pktinfo *pkt);
 	unsigned int			size;
 
···
 static inline void *nft_expr_priv(const struct nft_expr *expr)
 {
 	return (void *)expr->data;
+}
+
+struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
+			       const struct nlattr *nla);
+void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr);
+int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
+		  const struct nft_expr *expr);
+
+static inline void nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
+{
+	__module_get(src->ops->type->owner);
+	memcpy(dst, src, src->ops->size);
 }
 
 /**

include/net/netfilter/nft_meta.h

···
 		      const struct nft_expr *expr);
 
 void nft_meta_get_eval(const struct nft_expr *expr,
-		       struct nft_data data[NFT_REG_MAX + 1],
+		       struct nft_regs *regs,
 		       const struct nft_pktinfo *pkt);
 
 void nft_meta_set_eval(const struct nft_expr *expr,
-		       struct nft_data data[NFT_REG_MAX + 1],
+		       struct nft_regs *regs,
 		       const struct nft_pktinfo *pkt);
 
 #endif

include/uapi/linux/netfilter/nf_tables.h

···
 #define NFT_CHAIN_MAXNAMELEN	32
 #define NFT_USERDATA_MAXLEN	256
 
+/**
+ * enum nft_registers - nf_tables registers
+ *
+ * nf_tables used to have five registers: a verdict register and four data
+ * registers of size 16. The data registers have been changed to 16 registers
+ * of size 4. For compatibility reasons, the NFT_REG_[1-4] registers still
+ * map to areas of size 16, the 4 byte registers are addressed using
+ * NFT_REG32_00 - NFT_REG32_15.
+ */
 enum nft_registers {
 	NFT_REG_VERDICT,
 	NFT_REG_1,
 	NFT_REG_2,
 	NFT_REG_3,
 	NFT_REG_4,
-	__NFT_REG_MAX
+	__NFT_REG_MAX,
+
+	NFT_REG32_00	= 8,
+	MFT_REG32_01,
+	NFT_REG32_02,
+	NFT_REG32_03,
+	NFT_REG32_04,
+	NFT_REG32_05,
+	NFT_REG32_06,
+	NFT_REG32_07,
+	NFT_REG32_08,
+	NFT_REG32_09,
+	NFT_REG32_10,
+	NFT_REG32_11,
+	NFT_REG32_12,
+	NFT_REG32_13,
+	NFT_REG32_14,
+	NFT_REG32_15,
 };
 #define NFT_REG_MAX	(__NFT_REG_MAX - 1)
+
+#define NFT_REG_SIZE	16
+#define NFT_REG32_SIZE	4
 
 /**
  * enum nft_verdicts - nf_tables internal verdicts
···
  * @NFT_SET_INTERVAL: set contains intervals
  * @NFT_SET_MAP: set is used as a dictionary
  * @NFT_SET_TIMEOUT: set uses timeouts
+ * @NFT_SET_EVAL: set contains expressions for evaluation
  */
 enum nft_set_flags {
 	NFT_SET_ANONYMOUS		= 0x1,
···
 	NFT_SET_INTERVAL		= 0x4,
 	NFT_SET_MAP			= 0x8,
 	NFT_SET_TIMEOUT			= 0x10,
+	NFT_SET_EVAL			= 0x20,
 };
 
 /**
···
  * @NFTA_SET_ELEM_TIMEOUT: timeout value (NLA_U64)
  * @NFTA_SET_ELEM_EXPIRATION: expiration time (NLA_U64)
  * @NFTA_SET_ELEM_USERDATA: user data (NLA_BINARY)
+ * @NFTA_SET_ELEM_EXPR: expression (NLA_NESTED: nft_expr_attributes)
  */
 enum nft_set_elem_attributes {
 	NFTA_SET_ELEM_UNSPEC,
···
 	NFTA_SET_ELEM_TIMEOUT,
 	NFTA_SET_ELEM_EXPIRATION,
 	NFTA_SET_ELEM_USERDATA,
+	NFTA_SET_ELEM_EXPR,
 	__NFTA_SET_ELEM_MAX
 };
 #define NFTA_SET_ELEM_MAX	(__NFTA_SET_ELEM_MAX - 1)
···
 	__NFTA_DATA_MAX
 };
 #define NFTA_DATA_MAX		(__NFTA_DATA_MAX - 1)
+
+/* Maximum length of a value */
+#define NFT_DATA_VALUE_MAXLEN	64
 
 /**
  * enum nft_verdict_attributes - nf_tables verdict netlink attributes
···
  * @NFTA_DYNSET_SREG_KEY: source register of the key (NLA_U32)
  * @NFTA_DYNSET_SREG_DATA: source register of the data (NLA_U32)
  * @NFTA_DYNSET_TIMEOUT: timeout value for the new element (NLA_U64)
+ * @NFTA_DYNSET_EXPR: expression (NLA_NESTED: nft_expr_attributes)
  */
 enum nft_dynset_attributes {
 	NFTA_DYNSET_UNSPEC,
···
 	NFTA_DYNSET_SREG_KEY,
 	NFTA_DYNSET_SREG_DATA,
 	NFTA_DYNSET_TIMEOUT,
+	NFTA_DYNSET_EXPR,
 	__NFTA_DYNSET_MAX,
 };
 #define NFTA_DYNSET_MAX		(__NFTA_DYNSET_MAX - 1)

include/uapi/linux/netfilter_bridge/ebtables.h

···
 
 #ifndef _UAPI__LINUX_BRIDGE_EFF_H
 #define _UAPI__LINUX_BRIDGE_EFF_H
-#include <linux/if.h>
 #include <linux/netfilter_bridge.h>
-#include <linux/if_ether.h>
 
 #define EBT_TABLE_MAXNAMELEN 32
 #define EBT_CHAIN_MAXNAMELEN EBT_TABLE_MAXNAMELEN

net/bridge/netfilter/nft_meta_bridge.c

···
 #include "../br_private.h"
 
 static void nft_meta_bridge_get_eval(const struct nft_expr *expr,
-				     struct nft_data data[NFT_REG_MAX + 1],
+				     struct nft_regs *regs,
 				     const struct nft_pktinfo *pkt)
 {
 	const struct nft_meta *priv = nft_expr_priv(expr);
 	const struct net_device *in = pkt->in, *out = pkt->out;
-	struct nft_data *dest = &data[priv->dreg];
+	u32 *dest = &regs->data[priv->dreg];
 	const struct net_bridge_port *p;
 
 	switch (priv->key) {
···
 		goto out;
 	}
 
-	strncpy((char *)dest->data, p->br->dev->name, sizeof(dest->data));
+	strncpy((char *)dest, p->br->dev->name, IFNAMSIZ);
 	return;
 out:
-	return nft_meta_get_eval(expr, data, pkt);
+	return nft_meta_get_eval(expr, regs, pkt);
 err:
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+	regs->verdict.code = NFT_BREAK;
 }
 
 static int nft_meta_bridge_get_init(const struct nft_ctx *ctx,
···
 				    const struct nlattr * const tb[])
 {
 	struct nft_meta *priv = nft_expr_priv(expr);
-	int err;
+	unsigned int len;
 
 	priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
 	switch (priv->key) {
 	case NFT_META_BRI_IIFNAME:
 	case NFT_META_BRI_OIFNAME:
+		len = IFNAMSIZ;
 		break;
 	default:
 		return nft_meta_get_init(ctx, expr, tb);
 	}
 
-	priv->dreg = ntohl(nla_get_be32(tb[NFTA_META_DREG]));
-	err = nft_validate_output_register(priv->dreg);
-	if (err < 0)
-		return err;
-
-	err = nft_validate_data_load(ctx, priv->dreg, NULL, NFT_DATA_VALUE);
-	if (err < 0)
-		return err;
-
-	return 0;
+	priv->dreg = nft_parse_register(tb[NFTA_META_DREG]);
+	return nft_validate_register_store(ctx, priv->dreg, NULL,
+					   NFT_DATA_VALUE, len);
 }
 
 static struct nft_expr_type nft_meta_bridge_type;

net/bridge/netfilter/nft_reject_bridge.c

···
 }
 
 static void nft_reject_bridge_eval(const struct nft_expr *expr,
-				 struct nft_data data[NFT_REG_MAX + 1],
-				 const struct nft_pktinfo *pkt)
+				   struct nft_regs *regs,
+				   const struct nft_pktinfo *pkt)
 {
 	struct nft_reject *priv = nft_expr_priv(expr);
 	struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out);
···
 		break;
 	}
 out:
-	data[NFT_REG_VERDICT].verdict = NF_DROP;
+	regs->verdict.code = NF_DROP;
 }
 
 static int nft_reject_bridge_validate(const struct nft_ctx *ctx,

net/ipv4/netfilter/nft_masq_ipv4.c

···
 #include <net/netfilter/ipv4/nf_nat_masquerade.h>
 
 static void nft_masq_ipv4_eval(const struct nft_expr *expr,
-			       struct nft_data data[NFT_REG_MAX + 1],
+			       struct nft_regs *regs,
 			       const struct nft_pktinfo *pkt)
 {
 	struct nft_masq *priv = nft_expr_priv(expr);
 	struct nf_nat_range range;
-	unsigned int verdict;
 
 	memset(&range, 0, sizeof(range));
 	range.flags = priv->flags;
 
-	verdict = nf_nat_masquerade_ipv4(pkt->skb, pkt->ops->hooknum,
-					 &range, pkt->out);
-
-	data[NFT_REG_VERDICT].verdict = verdict;
+	regs->verdict.code = nf_nat_masquerade_ipv4(pkt->skb, pkt->ops->hooknum,
+						    &range, pkt->out);
 }
 
 static struct nft_expr_type nft_masq_ipv4_type;

net/ipv4/netfilter/nft_redir_ipv4.c

···
 #include <net/netfilter/nft_redir.h>
 
 static void nft_redir_ipv4_eval(const struct nft_expr *expr,
-				struct nft_data data[NFT_REG_MAX + 1],
+				struct nft_regs *regs,
 				const struct nft_pktinfo *pkt)
 {
 	struct nft_redir *priv = nft_expr_priv(expr);
 	struct nf_nat_ipv4_multi_range_compat mr;
-	unsigned int verdict;
 
 	memset(&mr, 0, sizeof(mr));
 	if (priv->sreg_proto_min) {
 		mr.range[0].min.all =
-			*(__be16 *)&data[priv->sreg_proto_min].data[0];
+			*(__be16 *)&regs->data[priv->sreg_proto_min];
 		mr.range[0].max.all =
-			*(__be16 *)&data[priv->sreg_proto_max].data[0];
+			*(__be16 *)&regs->data[priv->sreg_proto_max];
 		mr.range[0].flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
 	}
 
 	mr.range[0].flags |= priv->flags;
 
-	verdict = nf_nat_redirect_ipv4(pkt->skb, &mr, pkt->ops->hooknum);
-	data[NFT_REG_VERDICT].verdict = verdict;
+	regs->verdict.code = nf_nat_redirect_ipv4(pkt->skb, &mr,
+						  pkt->ops->hooknum);
 }
 
 static struct nft_expr_type nft_redir_ipv4_type;

net/ipv4/netfilter/nft_reject_ipv4.c

···
 #include <net/netfilter/nft_reject.h>
 
 static void nft_reject_ipv4_eval(const struct nft_expr *expr,
-				 struct nft_data data[NFT_REG_MAX + 1],
+				 struct nft_regs *regs,
 				 const struct nft_pktinfo *pkt)
 {
 	struct nft_reject *priv = nft_expr_priv(expr);
···
 		break;
 	}
 
-	data[NFT_REG_VERDICT].verdict = NF_DROP;
+	regs->verdict.code = NF_DROP;
 }
 
 static struct nft_expr_type nft_reject_ipv4_type;

net/ipv6/netfilter/nft_masq_ipv6.c

···
 #include <net/netfilter/ipv6/nf_nat_masquerade.h>
 
 static void nft_masq_ipv6_eval(const struct nft_expr *expr,
-			       struct nft_data data[NFT_REG_MAX + 1],
+			       struct nft_regs *regs,
 			       const struct nft_pktinfo *pkt)
 {
 	struct nft_masq *priv = nft_expr_priv(expr);
 	struct nf_nat_range range;
-	unsigned int verdict;
 
 	memset(&range, 0, sizeof(range));
 	range.flags = priv->flags;
 
-	verdict = nf_nat_masquerade_ipv6(pkt->skb, &range, pkt->out);
-
-	data[NFT_REG_VERDICT].verdict = verdict;
+	regs->verdict.code = nf_nat_masquerade_ipv6(pkt->skb, &range, pkt->out);
 }
 
 static struct nft_expr_type nft_masq_ipv6_type;

net/ipv6/netfilter/nft_redir_ipv6.c

···
 #include <net/netfilter/nf_nat_redirect.h>
 
 static void nft_redir_ipv6_eval(const struct nft_expr *expr,
-				struct nft_data data[NFT_REG_MAX + 1],
+				struct nft_regs *regs,
 				const struct nft_pktinfo *pkt)
 {
 	struct nft_redir *priv = nft_expr_priv(expr);
 	struct nf_nat_range range;
-	unsigned int verdict;
 
 	memset(&range, 0, sizeof(range));
 	if (priv->sreg_proto_min) {
 		range.min_proto.all =
-			*(__be16 *)&data[priv->sreg_proto_min].data[0];
+			*(__be16 *)&regs->data[priv->sreg_proto_min],
 		range.max_proto.all =
-			*(__be16 *)&data[priv->sreg_proto_max].data[0];
+			*(__be16 *)&regs->data[priv->sreg_proto_max],
 		range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
 	}
 
 	range.flags |= priv->flags;
 
-	verdict = nf_nat_redirect_ipv6(pkt->skb, &range, pkt->ops->hooknum);
-	data[NFT_REG_VERDICT].verdict = verdict;
+	regs->verdict.code = nf_nat_redirect_ipv6(pkt->skb, &range,
+						  pkt->ops->hooknum);
 }
 
 static struct nft_expr_type nft_redir_ipv6_type;

net/ipv6/netfilter/nft_reject_ipv6.c

···
 #include <net/netfilter/ipv6/nf_reject.h>
 
 static void nft_reject_ipv6_eval(const struct nft_expr *expr,
-				 struct nft_data data[NFT_REG_MAX + 1],
+				 struct nft_regs *regs,
 				 const struct nft_pktinfo *pkt)
 {
 	struct nft_reject *priv = nft_expr_priv(expr);
···
 		break;
 	}
 
-	data[NFT_REG_VERDICT].verdict = NF_DROP;
+	regs->verdict.code = NF_DROP;
 }
 
 static struct nft_expr_type nft_reject_ipv6_type;

net/netfilter/nf_tables_api.c

···
 	return -1;
 };
 
+int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
+		  const struct nft_expr *expr)
+{
+	struct nlattr *nest;
+
+	nest = nla_nest_start(skb, attr);
+	if (!nest)
+		goto nla_put_failure;
+	if (nf_tables_fill_expr_info(skb, expr) < 0)
+		goto nla_put_failure;
+	nla_nest_end(skb, nest);
+	return 0;
+
+nla_put_failure:
+	return -1;
+}
+
 struct nft_expr_info {
 	const struct nft_expr_ops	*ops;
 	struct nlattr			*tb[NFT_EXPR_MAXATTR + 1];
···
 	if (expr->ops->destroy)
 		expr->ops->destroy(ctx, expr);
 	module_put(expr->ops->type->owner);
+}
+
+struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
+			       const struct nlattr *nla)
+{
+	struct nft_expr_info info;
+	struct nft_expr *expr;
+	int err;
+
+	err = nf_tables_expr_parse(ctx, nla, &info);
+	if (err < 0)
+		goto err1;
+
+	err = -ENOMEM;
+	expr = kzalloc(info.ops->size, GFP_KERNEL);
+	if (expr == NULL)
+		goto err2;
+
+	err = nf_tables_newexpr(ctx, &info, expr);
+	if (err < 0)
+		goto err2;
+
+	return expr;
+err2:
+	module_put(info.ops->type->owner);
+err1:
+	return ERR_PTR(err);
+}
+
+void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
+{
+	nf_tables_expr_destroy(ctx, expr);
+	kfree(expr);
 }
 
 /*
···
 	if (list == NULL)
 		goto nla_put_failure;
 	nft_rule_for_each_expr(expr, next, rule) {
-		struct nlattr *elem = nla_nest_start(skb, NFTA_LIST_ELEM);
-		if (elem == NULL)
+		if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0)
 			goto nla_put_failure;
-		if (nf_tables_fill_expr_info(skb, expr) < 0)
-			goto nla_put_failure;
-		nla_nest_end(skb, elem);
 	}
 	nla_nest_end(skb, list);
 
···
 	}
 
 	desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
-	if (desc.klen == 0 || desc.klen > FIELD_SIZEOF(struct nft_data, data))
+	if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
 		return -EINVAL;
 
 	flags = 0;
 	if (nla[NFTA_SET_FLAGS] != NULL) {
 		flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
 		if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
-			      NFT_SET_INTERVAL | NFT_SET_MAP |
-			      NFT_SET_TIMEOUT))
+			      NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
+			      NFT_SET_MAP | NFT_SET_EVAL))
 			return -EINVAL;
+		/* Only one of both operations is supported */
+		if ((flags & (NFT_SET_MAP | NFT_SET_EVAL)) ==
+			     (NFT_SET_MAP | NFT_SET_EVAL))
+			return -EOPNOTSUPP;
 	}
 
 	dtype = 0;
···
 			if (nla[NFTA_SET_DATA_LEN] == NULL)
 				return -EINVAL;
 			desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
-			if (desc.dlen == 0 ||
-			    desc.dlen > FIELD_SIZEOF(struct nft_data, data))
+			if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
 				return -EINVAL;
 		} else
-			desc.dlen = sizeof(struct nft_data);
+			desc.dlen = sizeof(struct nft_verdict);
 	} else if (flags & NFT_SET_MAP)
 		return -EINVAL;
 
···
 	enum nft_registers dreg;
 
 	dreg = nft_type_to_reg(set->dtype);
-	return nft_validate_data_load(ctx, dreg, nft_set_ext_data(ext),
-				      set->dtype == NFT_DATA_VERDICT ?
-				      NFT_DATA_VERDICT : NFT_DATA_VALUE);
+	return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
+					   set->dtype == NFT_DATA_VERDICT ?
+					   NFT_DATA_VERDICT : NFT_DATA_VALUE,
+					   set->dlen);
 }
 
 int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
···
 
 const struct nft_set_ext_type nft_set_ext_types[] = {
 	[NFT_SET_EXT_KEY]		= {
-		.len	= sizeof(struct nft_data),
-		.align	= __alignof__(struct nft_data),
+		.align	= __alignof__(u32),
 	},
 	[NFT_SET_EXT_DATA]		= {
-		.len	= sizeof(struct nft_data),
-		.align	= __alignof__(struct nft_data),
+		.align	= __alignof__(u32),
+	},
+	[NFT_SET_EXT_EXPR]		= {
+		.align	= __alignof__(struct nft_expr),
 	},
 	[NFT_SET_EXT_FLAGS]		= {
 		.len	= sizeof(u8),
···
 	    nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
 			  set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
 			  set->dlen) < 0)
+		goto nla_put_failure;
+
+	if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR) &&
+	    nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, nft_set_ext_expr(ext)) < 0)
 		goto nla_put_failure;
 
 	if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
···
 
 void *nft_set_elem_init(const struct nft_set *set,
 			const struct nft_set_ext_tmpl *tmpl,
-			const struct nft_data *key,
-			const struct nft_data *data,
+			const u32 *key, const u32 *data,
 			u64 timeout, gfp_t gfp)
 {
 	struct nft_set_ext *ext;
···
 	nft_data_uninit(nft_set_ext_key(ext), NFT_DATA_VALUE);
 	if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
 		nft_data_uninit(nft_set_ext_data(ext), set->dtype);
+	if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR))
+		nf_tables_expr_destroy(NULL, nft_set_ext_expr(ext));
 
 	kfree(elem);
 }
···
 		timeout = set->timeout;
 	}
 
-	err = nft_data_init(ctx, &elem.key, &d1, nla[NFTA_SET_ELEM_KEY]);
+	err = nft_data_init(ctx, &elem.key.val, sizeof(elem.key), &d1,
+			    nla[NFTA_SET_ELEM_KEY]);
 	if (err < 0)
 		goto err1;
 	err = -EINVAL;
 	if (d1.type != NFT_DATA_VALUE || d1.len != set->klen)
 		goto err2;
 
-	nft_set_ext_add(&tmpl, NFT_SET_EXT_KEY);
+	nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, d1.len);
 	if (timeout > 0) {
 		nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
 		if (timeout != set->timeout)
···
 	}
 
 	if (nla[NFTA_SET_ELEM_DATA] != NULL) {
-		err = nft_data_init(ctx, &data, &d2, nla[NFTA_SET_ELEM_DATA]);
+		err = nft_data_init(ctx, &data, sizeof(data), &d2,
+				    nla[NFTA_SET_ELEM_DATA]);
 		if (err < 0)
 			goto err2;
 
···
 			if (!(binding->flags & NFT_SET_MAP))
 				continue;
 
-			err = nft_validate_data_load(&bind_ctx, dreg,
-						     &data, d2.type);
+			err = nft_validate_register_store(&bind_ctx, dreg,
+							  &data,
+							  d2.type, d2.len);
 			if (err < 0)
 				goto err3;
 		}
 
-		nft_set_ext_add(&tmpl, NFT_SET_EXT_DATA);
+		nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, d2.len);
 	}
 
 	/* The full maximum length of userdata can exceed the maximum
···
 	}
 
 	err = -ENOMEM;
-	elem.priv = nft_set_elem_init(set, &tmpl, &elem.key, &data,
+	elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data, data.data,
 				      timeout, GFP_KERNEL);
 	if (elem.priv == NULL)
 		goto err3;
···
 	if (nla[NFTA_SET_ELEM_DATA] != NULL)
 		nft_data_uninit(&data, d2.type);
 err2:
-	nft_data_uninit(&elem.key, d1.type);
+	nft_data_uninit(&elem.key.val, d1.type);
 err1:
 	return err;
 }
···
 	if (nla[NFTA_SET_ELEM_KEY] == NULL)
 		goto err1;
 
-	err = nft_data_init(ctx, &elem.key, &desc, nla[NFTA_SET_ELEM_KEY]);
+	err = nft_data_init(ctx, &elem.key.val, sizeof(elem.key), &desc,
+			    nla[NFTA_SET_ELEM_KEY]);
 	if (err < 0)
 		goto err1;
 
···
 err3:
 	kfree(trans);
 err2:
-	nft_data_uninit(&elem.key, desc.type);
+	nft_data_uninit(&elem.key.val, desc.type);
 err1:
 	return err;
 }
···
 		return 0;
 
 	data = nft_set_ext_data(ext);
-	switch (data->verdict) {
+	switch (data->verdict.code) {
 	case NFT_JUMP:
 	case NFT_GOTO:
-		return nf_tables_check_loops(ctx, data->chain);
+		return nf_tables_check_loops(ctx, data->verdict.chain);
 	default:
 		return 0;
 	}
···
 			if (data == NULL)
 				continue;
 
-			switch (data->verdict) {
+			switch (data->verdict.code) {
 			case NFT_JUMP:
 			case NFT_GOTO:
-				err = nf_tables_check_loops(ctx, data->chain);
+				err = nf_tables_check_loops(ctx,
+							data->verdict.chain);
 				if (err < 0)
 					return err;
 			default:
···
 }
 
 /**
- *	nft_validate_input_register - validate an expressions' input register
+ *	nft_parse_register - parse a register value from a netlink attribute
+ *
+ *	@attr: netlink attribute
+ *
+ *	Parse and translate a register value from a netlink attribute.
+ *	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)
+{
+	unsigned int reg;
+
+	reg = ntohl(nla_get_be32(attr));
+	switch (reg) {
+	case NFT_REG_VERDICT...NFT_REG_4:
+		return reg * NFT_REG_SIZE / NFT_REG32_SIZE;
+	default:
+		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
+ *
+ *	@skb: socket buffer
+ *	@attr: attribute number
+ *	@reg: register number
+ *
+ *	Construct a netlink attribute containing the register number. For
+ *	compatibility reasons, register numbers being a multiple of 4 are
+ *	translated to the corresponding 128 bit register numbers.
+ */
+int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
+{
+	if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
+		reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
+	else
+		reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
+
+	return nla_put_be32(skb, attr, htonl(reg));
+}
+EXPORT_SYMBOL_GPL(nft_dump_register);
+
+/**
+ *	nft_validate_register_load - validate a load from a register
  *
  *	@reg: the register number
+ *	@len: the length of the data
  *
  * 	Validate that the input register is one of the general purpose
- * 	registers.
+ * 	registers and that the length of the load is within the bounds.
  */
-int nft_validate_input_register(enum nft_registers reg)
+int nft_validate_register_load(enum nft_registers reg, unsigned int len)
 {
-	if (reg <= NFT_REG_VERDICT)
+	if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
 		return -EINVAL;
-	if (reg > NFT_REG_MAX)
+	if (len == 0)
+		return -EINVAL;
+	if (reg * NFT_REG32_SIZE + len > FIELD_SIZEOF(struct nft_regs, data))
 		return -ERANGE;
+
 	return 0;
 }
-EXPORT_SYMBOL_GPL(nft_validate_input_register);
+EXPORT_SYMBOL_GPL(nft_validate_register_load);
 
 /**
- *	nft_validate_output_register - validate an expressions' output register
- *
- *	@reg: the register number
- *
- * 	Validate that the output register is one of the general purpose
- * 	registers or the verdict register.
- */
-int nft_validate_output_register(enum nft_registers reg)
-{
-	if (reg < NFT_REG_VERDICT)
-		return -EINVAL;
-	if (reg > NFT_REG_MAX)
-		return -ERANGE;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(nft_validate_output_register);
-
-/**
- *	nft_validate_data_load - validate an expressions' data load
+ *	nft_validate_register_store - validate an expressions' register store
  *
  *	@ctx: context of the expression performing the load
  * 	@reg: the destination register number
  * 	@data: the data to load
  * 	@type: the data type
+ * 	@len: the length of the data
  *
  * 	Validate that a data load uses the appropriate data type for
- * 	the destination register. A value of NULL for the data means
- * 	that its runtime gathered data, which is always of type
- * 	NFT_DATA_VALUE.
+ * 	the destination register and the length is within the bounds.
+ * 	A value of NULL for the data means that its runtime gathered
+ * 	data.
  */
-int nft_validate_data_load(const struct nft_ctx *ctx, enum nft_registers reg,
-			   const struct nft_data *data,
-			   enum nft_data_types type)
+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;
 
 	switch (reg) {
 	case NFT_REG_VERDICT:
-		if (data == NULL || type != NFT_DATA_VERDICT)
+		if (type != NFT_DATA_VERDICT)
 			return -EINVAL;
 
-		if (data->verdict == NFT_GOTO || data->verdict == NFT_JUMP) {
-			err = nf_tables_check_loops(ctx, data->chain);
+		if (data != NULL &&
+		    (data->verdict.code == NFT_GOTO ||
+		     data->verdict.code == NFT_JUMP)) {
+			err = nf_tables_check_loops(ctx, data->verdict.chain);
 			if (err < 0)
 				return err;
 
-			if (ctx->chain->level + 1 > data->chain->level) {
+			if (ctx->chain->level + 1 >
+			    data->verdict.chain->level) {
 				if (ctx->chain->level + 1 == NFT_JUMP_STACK_SIZE)
 					return -EMLINK;
-				data->chain->level = ctx->chain->level + 1;
+				data->verdict.chain->level = ctx->chain->level + 1;
 			}
 		}
 
 		return 0;
 	default:
+		if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
+			return -EINVAL;
+		if (len == 0)
+			return -EINVAL;
+		if (reg * NFT_REG32_SIZE + len >
+		    FIELD_SIZEOF(struct nft_regs, data))
+			return -ERANGE;
+
 		if (data != NULL && type != NFT_DATA_VALUE)
 			return -EINVAL;
 		return 0;
 	}
 }
-EXPORT_SYMBOL_GPL(nft_validate_data_load);
+EXPORT_SYMBOL_GPL(nft_validate_register_store);
 
 static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
 	[NFTA_VERDICT_CODE]	= { .type = NLA_U32 },
···
 
 	if (!tb[NFTA_VERDICT_CODE])
 		return -EINVAL;
-	data->verdict = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
+	data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
 
-	switch (data->verdict) {
+	switch (data->verdict.code) {
 	default:
-		switch (data->verdict & NF_VERDICT_MASK) {
+		switch (data->verdict.code & NF_VERDICT_MASK) {
 		case NF_ACCEPT:
 		case NF_DROP:
 		case NF_QUEUE:
···
 			return -EOPNOTSUPP;
 
 		chain->use++;
-		data->chain = chain;
+		data->verdict.chain = chain;
 		desc->len = sizeof(data);
 		break;
 	}
···
 
 static void nft_verdict_uninit(const struct nft_data *data)
 {
-	switch (data->verdict) {
+	switch (data->verdict.code) {
 	case NFT_JUMP:
 	case NFT_GOTO:
-		data->chain->use--;
+		data->verdict.chain->use--;
 		break;
 	}
 }
···
 	if (!nest)
 		goto nla_put_failure;
 
-	if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(data->verdict)))
+	if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(data->verdict.code)))
 		goto nla_put_failure;
 
-	switch (data->verdict) {
+	switch (data->verdict.code) {
 	case NFT_JUMP:
 	case NFT_GOTO:
-		if (nla_put_string(skb, NFTA_VERDICT_CHAIN, data->chain->name))
+		if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
+				   data->verdict.chain->name))
 			goto nla_put_failure;
 	}
 	nla_nest_end(skb, nest);
···
 	return -1;
 }
 
-static int nft_value_init(const struct nft_ctx *ctx, struct nft_data *data,
+static int nft_value_init(const struct nft_ctx *ctx,
+			  struct nft_data *data, unsigned int size,
 			  struct nft_data_desc *desc, const struct nlattr *nla)
 {
 	unsigned int len;
···
 	len = nla_len(nla);
 	if (len == 0)
 		return -EINVAL;
-	if (len > sizeof(data->data))
+	if (len > size)
 		return -EOVERFLOW;
 
-	nla_memcpy(data->data, nla, sizeof(data->data));
+	nla_memcpy(data->data, nla, len);
 	desc->type = NFT_DATA_VALUE;
 	desc->len  = len;
 	return 0;
···
 }
 
 static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
-	[NFTA_DATA_VALUE]	= { .type = NLA_BINARY,
-				    .len  = FIELD_SIZEOF(struct nft_data, data) },
+	[NFTA_DATA_VALUE]	= { .type = NLA_BINARY },
 	[NFTA_DATA_VERDICT]	= { .type = NLA_NESTED },
 };
 
···
  *
  *	@ctx: context of the expression using the data
  *	@data: destination struct nft_data
+ *	@size: maximum data length
  *	@desc: data description
  *	@nla: netlink attribute containing data
  *
···
  *	The caller can indicate that it only wants to accept data of type
  *	NFT_DATA_VALUE by passing NULL for the ctx argument.
  */
-int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
+int nft_data_init(const struct nft_ctx *ctx,
+		  struct nft_data *data, unsigned int size,
 		  struct nft_data_desc *desc, const struct nlattr *nla)
 {
 	struct nlattr *tb[NFTA_DATA_MAX + 1];
···
 		return err;
 
 	if (tb[NFTA_DATA_VALUE])
-		return nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
+		return nft_value_init(ctx, data, size, desc,
+				      tb[NFTA_DATA_VALUE]);
 	if (tb[NFTA_DATA_VERDICT] && ctx != NULL)
 		return nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
 	return -EINVAL;

net/netfilter/nf_tables_core.c

···
 }
 
 static void nft_cmp_fast_eval(const struct nft_expr *expr,
-			      struct nft_data data[NFT_REG_MAX + 1])
+			      struct nft_regs *regs)
 {
 	const struct nft_cmp_fast_expr *priv = nft_expr_priv(expr);
 	u32 mask = nft_cmp_fast_mask(priv->len);
 
-	if ((data[priv->sreg].data[0] & mask) == priv->data)
+	if ((regs->data[priv->sreg] & mask) == priv->data)
 		return;
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+	regs->verdict.code = NFT_BREAK;
 }
 
 static bool nft_payload_fast_eval(const struct nft_expr *expr,
-				  struct nft_data data[NFT_REG_MAX + 1],
+				  struct nft_regs *regs,
 				  const struct nft_pktinfo *pkt)
 {
 	const struct nft_payload *priv = nft_expr_priv(expr);
 	const struct sk_buff *skb = pkt->skb;
-	struct nft_data *dest = &data[priv->dreg];
+	u32 *dest = &regs->data[priv->dreg];
 	unsigned char *ptr;
 
 	if (priv->base == NFT_PAYLOAD_NETWORK_HEADER)
···
 	if (unlikely(ptr + priv->len >= skb_tail_pointer(skb)))
 		return false;
 
+	*dest = 0;
 	if (priv->len == 2)
-		*(u16 *)dest->data = *(u16 *)ptr;
+		*(u16 *)dest = *(u16 *)ptr;
 	else if (priv->len == 4)
-		*(u32 *)dest->data = *(u32 *)ptr;
+		*(u32 *)dest = *(u32 *)ptr;
 	else
-		*(u8 *)dest->data = *(u8 *)ptr;
+		*(u8 *)dest = *(u8 *)ptr;
 	return true;
 }
 
···
 	const struct net *net = read_pnet(&nft_base_chain(basechain)->pnet);
 	const struct nft_rule *rule;
 	const struct nft_expr *expr, *last;
-	struct nft_data data[NFT_REG_MAX + 1];
+	struct nft_regs regs;
 	unsigned int stackptr = 0;
 	struct nft_jumpstack jumpstack[NFT_JUMP_STACK_SIZE];
 	struct nft_stats *stats;
···
 	rulenum = 0;
 	rule = list_entry(&chain->rules, struct nft_rule, list);
 next_rule:
-	data[NFT_REG_VERDICT].verdict = NFT_CONTINUE;
+	regs.verdict.code = NFT_CONTINUE;
 	list_for_each_entry_continue_rcu(rule, &chain->rules, list) {
 
 		/* This rule is not active, skip. */
···
 
 		nft_rule_for_each_expr(expr, last, rule) {
 			if (expr->ops == &nft_cmp_fast_ops)
-				nft_cmp_fast_eval(expr, data);
+				nft_cmp_fast_eval(expr, &regs);
 			else if (expr->ops != &nft_payload_fast_ops ||
-				 !nft_payload_fast_eval(expr, data, pkt))
-				expr->ops->eval(expr, data, pkt);
+				 !nft_payload_fast_eval(expr, &regs, pkt))
+				expr->ops->eval(expr, &regs, pkt);
 
-			if (data[NFT_REG_VERDICT].verdict != NFT_CONTINUE)
+			if (regs.verdict.code != NFT_CONTINUE)
 				break;
 		}
 
-		switch (data[NFT_REG_VERDICT].verdict) {
+		switch (regs.verdict.code) {
 		case NFT_BREAK:
-			data[NFT_REG_VERDICT].verdict = NFT_CONTINUE;
+			regs.verdict.code = NFT_CONTINUE;
 			continue;
 		case NFT_CONTINUE:
 			nft_trace_packet(pkt, chain, rulenum, NFT_TRACE_RULE);
···
 		break;
 	}
 
-	switch (data[NFT_REG_VERDICT].verdict & NF_VERDICT_MASK) {
+	switch (regs.verdict.code & NF_VERDICT_MASK) {
 	case NF_ACCEPT:
 	case NF_DROP:
 	case NF_QUEUE:
 		nft_trace_packet(pkt, chain, rulenum, NFT_TRACE_RULE);
-		return data[NFT_REG_VERDICT].verdict;
+		return regs.verdict.code;
 	}
 
-	switch (data[NFT_REG_VERDICT].verdict) {
+	switch (regs.verdict.code) {
 	case NFT_JUMP:
 		BUG_ON(stackptr >= NFT_JUMP_STACK_SIZE);
 		jumpstack[stackptr].chain = chain;
···
 	case NFT_GOTO:
 		nft_trace_packet(pkt, chain, rulenum, NFT_TRACE_RULE);
 
-		chain = data[NFT_REG_VERDICT].chain;
+		chain = regs.verdict.chain;
 		goto do_chain;
 	case NFT_CONTINUE:
 		rulenum++;

net/netfilter/nft_bitwise.c

···
 };
 
 static void nft_bitwise_eval(const struct nft_expr *expr,
-			     struct nft_data data[NFT_REG_MAX + 1],
+			     struct nft_regs *regs,
 			     const struct nft_pktinfo *pkt)
 {
 	const struct nft_bitwise *priv = nft_expr_priv(expr);
-	const struct nft_data *src = &data[priv->sreg];
-	struct nft_data *dst = &data[priv->dreg];
+	const u32 *src = &regs->data[priv->sreg];
+	u32 *dst = &regs->data[priv->dreg];
 	unsigned int i;
 
-	for (i = 0; i < DIV_ROUND_UP(priv->len, 4); i++) {
-		dst->data[i] = (src->data[i] & priv->mask.data[i]) ^
-			       priv->xor.data[i];
-	}
+	for (i = 0; i < DIV_ROUND_UP(priv->len, 4); i++)
+		dst[i] = (src[i] & priv->mask.data[i]) ^ priv->xor.data[i];
 }
 
 static const struct nla_policy nft_bitwise_policy[NFTA_BITWISE_MAX + 1] = {
···
 	    tb[NFTA_BITWISE_XOR] == NULL)
 		return -EINVAL;
 
-	priv->sreg = ntohl(nla_get_be32(tb[NFTA_BITWISE_SREG]));
-	err = nft_validate_input_register(priv->sreg);
+	priv->len  = ntohl(nla_get_be32(tb[NFTA_BITWISE_LEN]));
+	priv->sreg = nft_parse_register(tb[NFTA_BITWISE_SREG]);
+	err = nft_validate_register_load(priv->sreg, priv->len);
 	if (err < 0)
 		return err;
 
-	priv->dreg = ntohl(nla_get_be32(tb[NFTA_BITWISE_DREG]));
-	err = nft_validate_output_register(priv->dreg);
-	if (err < 0)
-		return err;
-	err = nft_validate_data_load(ctx, priv->dreg, NULL, NFT_DATA_VALUE);
+	priv->dreg = nft_parse_register(tb[NFTA_BITWISE_DREG]);
+	err = nft_validate_register_store(ctx, priv->dreg, NULL,
+					  NFT_DATA_VALUE, priv->len);
 	if (err < 0)
 		return err;
 
-	priv->len = ntohl(nla_get_be32(tb[NFTA_BITWISE_LEN]));
-
-	err = nft_data_init(NULL, &priv->mask, &d1, tb[NFTA_BITWISE_MASK]);
+	err = nft_data_init(NULL, &priv->mask, sizeof(priv->mask), &d1,
+			    tb[NFTA_BITWISE_MASK]);
 	if (err < 0)
 		return err;
 	if (d1.len != priv->len)
 		return -EINVAL;
 
-	err = nft_data_init(NULL, &priv->xor, &d2, tb[NFTA_BITWISE_XOR]);
+	err = nft_data_init(NULL, &priv->xor, sizeof(priv->xor), &d2,
+			    tb[NFTA_BITWISE_XOR]);
 	if (err < 0)
 		return err;
 	if (d2.len != priv->len)
···
 {
 	const struct nft_bitwise *priv = nft_expr_priv(expr);
 
-	if (nla_put_be32(skb, NFTA_BITWISE_SREG, htonl(priv->sreg)))
+	if (nft_dump_register(skb, NFTA_BITWISE_SREG, priv->sreg))
 		goto nla_put_failure;
-	if (nla_put_be32(skb, NFTA_BITWISE_DREG, htonl(priv->dreg)))
+	if (nft_dump_register(skb, NFTA_BITWISE_DREG, priv->dreg))
 		goto nla_put_failure;
 	if (nla_put_be32(skb, NFTA_BITWISE_LEN, htonl(priv->len)))
 		goto nla_put_failure;

net/netfilter/nft_byteorder.c

···
 };
 
 static void nft_byteorder_eval(const struct nft_expr *expr,
-			       struct nft_data data[NFT_REG_MAX + 1],
+			       struct nft_regs *regs,
 			       const struct nft_pktinfo *pkt)
 {
 	const struct nft_byteorder *priv = nft_expr_priv(expr);
-	struct nft_data *src = &data[priv->sreg], *dst = &data[priv->dreg];
+	u32 *src = &regs->data[priv->sreg];
+	u32 *dst = &regs->data[priv->dreg];
 	union { u32 u32; u16 u16; } *s, *d;
 	unsigned int i;
 
-	s = (void *)src->data;
-	d = (void *)dst->data;
+	s = (void *)src;
+	d = (void *)dst;
 
 	switch (priv->size) {
 	case 4:
···
 	    tb[NFTA_BYTEORDER_OP] == NULL)
 		return -EINVAL;
 
-	priv->sreg = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_SREG]));
-	err = nft_validate_input_register(priv->sreg);
-	if (err < 0)
-		return err;
-
-	priv->dreg = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_DREG]));
-	err = nft_validate_output_register(priv->dreg);
-	if (err < 0)
-		return err;
-	err = nft_validate_data_load(ctx, priv->dreg, NULL, NFT_DATA_VALUE);
-	if (err < 0)
-		return err;
-
 	priv->op = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_OP]));
 	switch (priv->op) {
 	case NFT_BYTEORDER_NTOH:
···
 	default:
 		return -EINVAL;
 	}
-
-	priv->len = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_LEN]));
-	if (priv->len == 0 || priv->len > FIELD_SIZEOF(struct nft_data, data))
-		return -EINVAL;
 
 	priv->size = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_SIZE]));
 	switch (priv->size) {
···
 		return -EINVAL;
 	}
 
-	return 0;
+	priv->sreg = nft_parse_register(tb[NFTA_BYTEORDER_SREG]);
+	priv->len  = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_LEN]));
+	err = nft_validate_register_load(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);
 }
 
 static int nft_byteorder_dump(struct sk_buff *skb, const struct nft_expr *expr)
 {
 	const struct nft_byteorder *priv = nft_expr_priv(expr);
 
-	if (nla_put_be32(skb, NFTA_BYTEORDER_SREG, htonl(priv->sreg)))
+	if (nft_dump_register(skb, NFTA_BYTEORDER_SREG, priv->sreg))
 		goto nla_put_failure;
-	if (nla_put_be32(skb, NFTA_BYTEORDER_DREG, htonl(priv->dreg)))
+	if (nft_dump_register(skb, NFTA_BYTEORDER_DREG, priv->dreg))
 		goto nla_put_failure;
 	if (nla_put_be32(skb, NFTA_BYTEORDER_OP, htonl(priv->op)))
 		goto nla_put_failure;

net/netfilter/nft_cmp.c

···
 };
 
 static void nft_cmp_eval(const struct nft_expr *expr,
-			 struct nft_data data[NFT_REG_MAX + 1],
+			 struct nft_regs *regs,
 			 const struct nft_pktinfo *pkt)
 {
 	const struct nft_cmp_expr *priv = nft_expr_priv(expr);
 	int d;
 
-	d = nft_data_cmp(&data[priv->sreg], &priv->data, priv->len);
+	d = memcmp(&regs->data[priv->sreg], &priv->data, priv->len);
 	switch (priv->op) {
 	case NFT_CMP_EQ:
 		if (d != 0)
···
 	return;
 
 mismatch:
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+	regs->verdict.code = NFT_BREAK;
 }
 
 static const struct nla_policy nft_cmp_policy[NFTA_CMP_MAX + 1] = {
···
 	struct nft_data_desc desc;
 	int err;
 
-	priv->sreg = ntohl(nla_get_be32(tb[NFTA_CMP_SREG]));
-	priv->op = ntohl(nla_get_be32(tb[NFTA_CMP_OP]));
-
-	err = nft_data_init(NULL, &priv->data, &desc, tb[NFTA_CMP_DATA]);
+	err = nft_data_init(NULL, &priv->data, sizeof(priv->data), &desc,
+			    tb[NFTA_CMP_DATA]);
 	BUG_ON(err < 0);
 
+	priv->sreg = nft_parse_register(tb[NFTA_CMP_SREG]);
+	err = nft_validate_register_load(priv->sreg, desc.len);
+	if (err < 0)
+		return err;
+
+	priv->op  = ntohl(nla_get_be32(tb[NFTA_CMP_OP]));
 	priv->len = desc.len;
 	return 0;
 }
···
 {
 	const struct nft_cmp_expr *priv = nft_expr_priv(expr);
 
-	if (nla_put_be32(skb, NFTA_CMP_SREG, htonl(priv->sreg)))
+	if (nft_dump_register(skb, NFTA_CMP_SREG, priv->sreg))
 		goto nla_put_failure;
 	if (nla_put_be32(skb, NFTA_CMP_OP, htonl(priv->op)))
 		goto nla_put_failure;
···
 	u32 mask;
 	int err;
 
-	priv->sreg = ntohl(nla_get_be32(tb[NFTA_CMP_SREG]));
-
-	err = nft_data_init(NULL, &data, &desc, tb[NFTA_CMP_DATA]);
+	err = nft_data_init(NULL, &data, sizeof(data), &desc,
+			    tb[NFTA_CMP_DATA]);
 	BUG_ON(err < 0);
-	desc.len *= BITS_PER_BYTE;
 
+	priv->sreg = nft_parse_register(tb[NFTA_CMP_SREG]);
+	err = nft_validate_register_load(priv->sreg, desc.len);
+	if (err < 0)
+		return err;
+
+	desc.len *= BITS_PER_BYTE;
 	mask = nft_cmp_fast_mask(desc.len);
+
 	priv->data = data.data[0] & mask;
 	priv->len  = desc.len;
 	return 0;
···
 	const struct nft_cmp_fast_expr *priv = nft_expr_priv(expr);
 	struct nft_data data;
 
-	if (nla_put_be32(skb, NFTA_CMP_SREG, htonl(priv->sreg)))
+	if (nft_dump_register(skb, NFTA_CMP_SREG, priv->sreg))
 		goto nla_put_failure;
 	if (nla_put_be32(skb, NFTA_CMP_OP, htonl(NFT_CMP_EQ)))
 		goto nla_put_failure;
···
 {
 	struct nft_data_desc desc;
 	struct nft_data data;
-	enum nft_registers sreg;
 	enum nft_cmp_ops op;
 	int err;
 
···
 	    tb[NFTA_CMP_OP] == NULL ||
 	    tb[NFTA_CMP_DATA] == NULL)
 		return ERR_PTR(-EINVAL);
-
-	sreg = ntohl(nla_get_be32(tb[NFTA_CMP_SREG]));
-	err = nft_validate_input_register(sreg);
-	if (err < 0)
-		return ERR_PTR(err);
 
 	op = ntohl(nla_get_be32(tb[NFTA_CMP_OP]));
 	switch (op) {
···
 		return ERR_PTR(-EINVAL);
 	}
 
-	err = nft_data_init(NULL, &data, &desc, tb[NFTA_CMP_DATA]);
+	err = nft_data_init(NULL, &data, sizeof(data), &desc,
+			    tb[NFTA_CMP_DATA]);
 	if (err < 0)
 		return ERR_PTR(err);
 

net/netfilter/nft_compat.c

···
 }
 
 static void nft_target_eval_xt(const struct nft_expr *expr,
-			       struct nft_data data[NFT_REG_MAX + 1],
+			       struct nft_regs *regs,
 			       const struct nft_pktinfo *pkt)
 {
 	void *info = nft_expr_priv(expr);
···
 
 	switch (ret) {
 	case XT_CONTINUE:
-		data[NFT_REG_VERDICT].verdict = NFT_CONTINUE;
+		regs->verdict.code = NFT_CONTINUE;
 		break;
 	default:
-		data[NFT_REG_VERDICT].verdict = ret;
+		regs->verdict.code = ret;
 		break;
 	}
 }
 
 static void nft_target_eval_bridge(const struct nft_expr *expr,
-				   struct nft_data data[NFT_REG_MAX + 1],
+				   struct nft_regs *regs,
 				   const struct nft_pktinfo *pkt)
 {
 	void *info = nft_expr_priv(expr);
···
 
 	switch (ret) {
 	case EBT_ACCEPT:
-		data[NFT_REG_VERDICT].verdict = NF_ACCEPT;
+		regs->verdict.code = NF_ACCEPT;
 		break;
 	case EBT_DROP:
-		data[NFT_REG_VERDICT].verdict = NF_DROP;
+		regs->verdict.code = NF_DROP;
 		break;
 	case EBT_CONTINUE:
-		data[NFT_REG_VERDICT].verdict = NFT_CONTINUE;
+		regs->verdict.code = NFT_CONTINUE;
 		break;
 	case EBT_RETURN:
-		data[NFT_REG_VERDICT].verdict = NFT_RETURN;
+		regs->verdict.code = NFT_RETURN;
 		break;
 	default:
-		data[NFT_REG_VERDICT].verdict = ret;
+		regs->verdict.code = ret;
 		break;
 	}
 }
···
 }
 
 static void nft_match_eval(const struct nft_expr *expr,
-			   struct nft_data data[NFT_REG_MAX + 1],
+			   struct nft_regs *regs,
 			   const struct nft_pktinfo *pkt)
 {
 	void *info = nft_expr_priv(expr);
···
 	ret = match->match(skb, (struct xt_action_param *)&pkt->xt);
 
 	if (pkt->xt.hotdrop) {
-		data[NFT_REG_VERDICT].verdict = NF_DROP;
+		regs->verdict.code = NF_DROP;
 		return;
 	}
 
 	switch (ret ? 1 : 0) {
 	case 1:
-		data[NFT_REG_VERDICT].verdict = NFT_CONTINUE;
+		regs->verdict.code = NFT_CONTINUE;
 		break;
 	case 0:
-		data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+		regs->verdict.code = NFT_BREAK;
 		break;
 	}
 }

net/netfilter/nft_counter.c

···
 };
 
 static void nft_counter_eval(const struct nft_expr *expr,
-			     struct nft_data data[NFT_REG_MAX + 1],
+			     struct nft_regs *regs,
 			     const struct nft_pktinfo *pkt)
 {
 	struct nft_counter *priv = nft_expr_priv(expr);
···
 	.ops		= &nft_counter_ops,
 	.policy		= nft_counter_policy,
 	.maxattr	= NFTA_COUNTER_MAX,
+	.flags		= NFT_EXPR_STATEFUL,
 	.owner		= THIS_MODULE,
 };
 

net/netfilter/nft_ct.c

···
 };
 
 static void nft_ct_get_eval(const struct nft_expr *expr,
-			    struct nft_data data[NFT_REG_MAX + 1],
+			    struct nft_regs *regs,
 			    const struct nft_pktinfo *pkt)
 {
 	const struct nft_ct *priv = nft_expr_priv(expr);
-	struct nft_data *dest = &data[priv->dreg];
+	u32 *dest = &regs->data[priv->dreg];
 	enum ip_conntrack_info ctinfo;
 	const struct nf_conn *ct;
 	const struct nf_conn_help *help;
···
 			state = NF_CT_STATE_UNTRACKED_BIT;
 		else
 			state = NF_CT_STATE_BIT(ctinfo);
-		dest->data[0] = state;
+		*dest = state;
 		return;
 	default:
 		break;
···
 
 	switch (priv->key) {
 	case NFT_CT_DIRECTION:
-		dest->data[0] = CTINFO2DIR(ctinfo);
+		*dest = CTINFO2DIR(ctinfo);
 		return;
 	case NFT_CT_STATUS:
-		dest->data[0] = ct->status;
+		*dest = ct->status;
 		return;
 #ifdef CONFIG_NF_CONNTRACK_MARK
 	case NFT_CT_MARK:
-		dest->data[0] = ct->mark;
+		*dest = ct->mark;
 		return;
 #endif
 #ifdef CONFIG_NF_CONNTRACK_SECMARK
 	case NFT_CT_SECMARK:
-		dest->data[0] = ct->secmark;
+		*dest = ct->secmark;
 		return;
 #endif
 	case NFT_CT_EXPIRATION:
 		diff = (long)jiffies - (long)ct->timeout.expires;
 		if (diff < 0)
 			diff = 0;
-		dest->data[0] = jiffies_to_msecs(diff);
+		*dest = jiffies_to_msecs(diff);
 		return;
 	case NFT_CT_HELPER:
 		if (ct->master == NULL)
···
 		helper = rcu_dereference(help->helper);
 		if (helper == NULL)
 			goto err;
-		if (strlen(helper->name) >= sizeof(dest->data))
-			goto err;
-		strncpy((char *)dest->data, helper->name, sizeof(dest->data));
+		strncpy((char *)dest, helper->name, NF_CT_HELPER_NAME_LEN);
 		return;
 #ifdef CONFIG_NF_CONNTRACK_LABELS
 	case NFT_CT_LABELS: {
···
 		unsigned int size;
 
 		if (!labels) {
-			memset(dest->data, 0, sizeof(dest->data));
+			memset(dest, 0, NF_CT_LABELS_MAX_SIZE);
 			return;
 		}
 
-		BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE > sizeof(dest->data));
 		size = labels->words * sizeof(long);
-
-		memcpy(dest->data, labels->bits, size);
-		if (size < sizeof(dest->data))
-			memset(((char *) dest->data) + size, 0,
-			       sizeof(dest->data) - size);
+		memcpy(dest, labels->bits, size);
+		if (size < NF_CT_LABELS_MAX_SIZE)
+			memset(((char *) dest) + size, 0,
+			       NF_CT_LABELS_MAX_SIZE - size);
 		return;
 	}
 #endif
···
 	tuple = &ct->tuplehash[priv->dir].tuple;
 	switch (priv->key) {
 	case NFT_CT_L3PROTOCOL:
-		dest->data[0] = nf_ct_l3num(ct);
+		*dest = nf_ct_l3num(ct);
 		return;
 	case NFT_CT_SRC:
-		memcpy(dest->data, tuple->src.u3.all,
+		memcpy(dest, tuple->src.u3.all,
 		       nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16);
 		return;
 	case NFT_CT_DST:
-		memcpy(dest->data, tuple->dst.u3.all,
+		memcpy(dest, tuple->dst.u3.all,
 		       nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16);
 		return;
 	case NFT_CT_PROTOCOL:
-		dest->data[0] = nf_ct_protonum(ct);
+		*dest = nf_ct_protonum(ct);
 		return;
 	case NFT_CT_PROTO_SRC:
-		dest->data[0] = (__force __u16)tuple->src.u.all;
+		*dest = (__force __u16)tuple->src.u.all;
 		return;
 	case NFT_CT_PROTO_DST:
-		dest->data[0] = (__force __u16)tuple->dst.u.all;
+		*dest = (__force __u16)tuple->dst.u.all;
 		return;
 	default:
 		break;
 	}
 	return;
 err:
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+	regs->verdict.code = NFT_BREAK;
 }
 
 static void nft_ct_set_eval(const struct nft_expr *expr,
-			    struct nft_data data[NFT_REG_MAX + 1],
+			    struct nft_regs *regs,
 			    const struct nft_pktinfo *pkt)
 {
 	const struct nft_ct *priv = nft_expr_priv(expr);
 	struct sk_buff *skb = pkt->skb;
 #ifdef CONFIG_NF_CONNTRACK_MARK
-	u32 value = data[priv->sreg].data[0];
+	u32 value = regs->data[priv->sreg];
 #endif
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct;
···
 			   const struct nlattr * const tb[])
 {
 	struct nft_ct *priv = nft_expr_priv(expr);
+	unsigned int len;
 	int err;
 
 	priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY]));
 	switch (priv->key) {
-	case NFT_CT_STATE:
 	case NFT_CT_DIRECTION:
+		if (tb[NFTA_CT_DIRECTION] != NULL)
+			return -EINVAL;
+		len = sizeof(u8);
+		break;
+	case NFT_CT_STATE:
 	case NFT_CT_STATUS:
 #ifdef CONFIG_NF_CONNTRACK_MARK
 	case NFT_CT_MARK:
···
 #ifdef CONFIG_NF_CONNTRACK_SECMARK
 	case NFT_CT_SECMARK:
 #endif
+	case NFT_CT_EXPIRATION:
+		if (tb[NFTA_CT_DIRECTION] != NULL)
+			return -EINVAL;
+		len = sizeof(u32);
+		break;
 #ifdef CONFIG_NF_CONNTRACK_LABELS
 	case NFT_CT_LABELS:
+		if (tb[NFTA_CT_DIRECTION] != NULL)
+			return -EINVAL;
+		len = NF_CT_LABELS_MAX_SIZE;
+		break;
 #endif
-	case NFT_CT_EXPIRATION:
 	case NFT_CT_HELPER:
 		if (tb[NFTA_CT_DIRECTION] != NULL)
 			return -EINVAL;
+		len = NF_CT_HELPER_NAME_LEN;
 		break;
+
 	case NFT_CT_L3PROTOCOL:
 	case NFT_CT_PROTOCOL:
+		if (tb[NFTA_CT_DIRECTION] == NULL)
+			return -EINVAL;
+		len = sizeof(u8);
+		break;
 	case NFT_CT_SRC:
 	case NFT_CT_DST:
+		if (tb[NFTA_CT_DIRECTION] == NULL)
+			return -EINVAL;
+
+		switch (ctx->afi->family) {
+		case NFPROTO_IPV4:
+			len = FIELD_SIZEOF(struct nf_conntrack_tuple,
+					   src.u3.ip);
+			break;
+		case NFPROTO_IPV6:
+		case NFPROTO_INET:
+			len = FIELD_SIZEOF(struct nf_conntrack_tuple,
+					   src.u3.ip6);
+			break;
+		default:
+			return -EAFNOSUPPORT;
+		}
+		break;
 	case NFT_CT_PROTO_SRC:
 	case NFT_CT_PROTO_DST:
 		if (tb[NFTA_CT_DIRECTION] == NULL)
 			return -EINVAL;
+		len = FIELD_SIZEOF(struct nf_conntrack_tuple, src.u.all);
 		break;
 	default:
 		return -EOPNOTSUPP;
···
 		}
 	}
 
-	priv->dreg = ntohl(nla_get_be32(tb[NFTA_CT_DREG]));
-	err = nft_validate_output_register(priv->dreg);
-	if (err < 0)
-		return err;
-
-	err = nft_validate_data_load(ctx, priv->dreg, NULL, NFT_DATA_VALUE);
+	priv->dreg = nft_parse_register(tb[NFTA_CT_DREG]);
+	err = nft_validate_register_store(ctx, priv->dreg, NULL,
+					  NFT_DATA_VALUE, len);
 	if (err < 0)
 		return err;
 
···
 			   const struct nlattr * const tb[])
 {
 	struct nft_ct *priv = nft_expr_priv(expr);
+	unsigned int len;
 	int err;
 
 	priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY]));
 	switch (priv->key) {
 #ifdef CONFIG_NF_CONNTRACK_MARK
 	case NFT_CT_MARK:
+		len = FIELD_SIZEOF(struct nf_conn, mark);
 		break;
 #endif
 	default:
 		return -EOPNOTSUPP;
 	}
 
-	priv->sreg = ntohl(nla_get_be32(tb[NFTA_CT_SREG]));
-	err = nft_validate_input_register(priv->sreg);
+	priv->sreg = nft_parse_register(tb[NFTA_CT_SREG]);
+	err = nft_validate_register_load(priv->sreg, len);
 	if (err < 0)
 		return err;
 
···
 {
 	const struct nft_ct *priv = nft_expr_priv(expr);
 
-	if (nla_put_be32(skb, NFTA_CT_DREG, htonl(priv->dreg)))
+	if (nft_dump_register(skb, NFTA_CT_DREG, priv->dreg))
 		goto nla_put_failure;
 	if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key)))
 		goto nla_put_failure;
···
 {
 	const struct nft_ct *priv = nft_expr_priv(expr);
 
-	if (nla_put_be32(skb, NFTA_CT_SREG, htonl(priv->sreg)))
+	if (nft_dump_register(skb, NFTA_CT_SREG, priv->sreg))
 		goto nla_put_failure;
 	if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key)))
 		goto nla_put_failure;

net/netfilter/nft_dynset.c

···
 	enum nft_registers		sreg_key:8;
 	enum nft_registers		sreg_data:8;
 	u64				timeout;
+	struct nft_expr			*expr;
 	struct nft_set_binding		binding;
 };
 
 static void *nft_dynset_new(struct nft_set *set, const struct nft_expr *expr,
-			    struct nft_data data[NFT_REG_MAX + 1])
+			    struct nft_regs *regs)
 {
 	const struct nft_dynset *priv = nft_expr_priv(expr);
+	struct nft_set_ext *ext;
 	u64 timeout;
 	void *elem;
 
···
 
 	timeout = priv->timeout ? : set->timeout;
 	elem = nft_set_elem_init(set, &priv->tmpl,
-				 &data[priv->sreg_key], &data[priv->sreg_data],
+				 &regs->data[priv->sreg_key],
+				 &regs->data[priv->sreg_data],
 				 timeout, GFP_ATOMIC);
 	if (elem == NULL) {
 		if (set->size)
 			atomic_dec(&set->nelems);
+		return NULL;
 	}
+
+	ext = nft_set_elem_ext(set, elem);
+	if (priv->expr != NULL)
+		nft_expr_clone(nft_set_ext_expr(ext), priv->expr);
+
 	return elem;
 }
 
 static void nft_dynset_eval(const struct nft_expr *expr,
-			    struct nft_data data[NFT_REG_MAX + 1],
+			    struct nft_regs *regs,
 			    const struct nft_pktinfo *pkt)
 {
 	const struct nft_dynset *priv = nft_expr_priv(expr);
 	struct nft_set *set = priv->set;
 	const struct nft_set_ext *ext;
+	const struct nft_expr *sexpr;
 	u64 timeout;
 
-	if (set->ops->update(set, &data[priv->sreg_key], nft_dynset_new,
-			     expr, data, &ext)) {
+	if (set->ops->update(set, &regs->data[priv->sreg_key], nft_dynset_new,
+			     expr, regs, &ext)) {
+		sexpr = NULL;
+		if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR))
+			sexpr = nft_set_ext_expr(ext);
+
 		if (priv->op == NFT_DYNSET_OP_UPDATE &&
 		    nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
 			timeout = priv->timeout ? : set->timeout;
 			*nft_set_ext_expiration(ext) = jiffies + timeout;
-			return;
-		}
-	}
+		} else if (sexpr == NULL)
+			goto out;
 
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+		if (sexpr != NULL)
+			sexpr->ops->eval(sexpr, regs, pkt);
+		return;
+	}
+out:
+	regs->verdict.code = NFT_BREAK;
 }
 
 static const struct nla_policy nft_dynset_policy[NFTA_DYNSET_MAX + 1] = {
···
 	[NFTA_DYNSET_SREG_KEY]	= { .type = NLA_U32 },
 	[NFTA_DYNSET_SREG_DATA]	= { .type = NLA_U32 },
 	[NFTA_DYNSET_TIMEOUT]	= { .type = NLA_U64 },
+	[NFTA_DYNSET_EXPR]	= { .type = NLA_NESTED },
 };
 
 static int nft_dynset_init(const struct nft_ctx *ctx,
···
 		timeout = be64_to_cpu(nla_get_be64(tb[NFTA_DYNSET_TIMEOUT]));
 	}
 
-	priv->sreg_key = ntohl(nla_get_be32(tb[NFTA_DYNSET_SREG_KEY]));
-	err = nft_validate_input_register(priv->sreg_key);
+	priv->sreg_key = nft_parse_register(tb[NFTA_DYNSET_SREG_KEY]);
+	err = nft_validate_register_load(priv->sreg_key, set->klen);;
 	if (err < 0)
 		return err;
 
···
 		if (set->dtype == NFT_DATA_VERDICT)
 			return -EOPNOTSUPP;
 
-		priv->sreg_data = ntohl(nla_get_be32(tb[NFTA_DYNSET_SREG_DATA]));
-		err = nft_validate_input_register(priv->sreg_data);
+		priv->sreg_data = nft_parse_register(tb[NFTA_DYNSET_SREG_DATA]);
+		err = nft_validate_register_load(priv->sreg_data, set->dlen);
 		if (err < 0)
 			return err;
 	} else if (set->flags & NFT_SET_MAP)
+		return -EINVAL;
+
+	if (tb[NFTA_DYNSET_EXPR] != NULL) {
+		if (!(set->flags & NFT_SET_EVAL))
+			return -EINVAL;
+		if (!(set->flags & NFT_SET_ANONYMOUS))
+			return -EOPNOTSUPP;
+
+		priv->expr = nft_expr_init(ctx, tb[NFTA_DYNSET_EXPR]);
+		if (IS_ERR(priv->expr))
+			return PTR_ERR(priv->expr);
+
+		err = -EOPNOTSUPP;
+		if (!(priv->expr->ops->type->flags & NFT_EXPR_STATEFUL))
+			goto err1;
+	} else if (set->flags & NFT_SET_EVAL)
 		return -EINVAL;
 
 	nft_set_ext_prepare(&priv->tmpl);
 	nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_KEY, set->klen);
 	if (set->flags & NFT_SET_MAP)
 		nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_DATA, set->dlen);
+	if (priv->expr != NULL)
+		nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_EXPR,
+				       priv->expr->ops->size);
 	if (set->flags & NFT_SET_TIMEOUT) {
 		if (timeout || set->timeout)
 			nft_set_ext_add(&priv->tmpl, NFT_SET_EXT_EXPIRATION);
···
 
 	err = nf_tables_bind_set(ctx, set, &priv->binding);
 	if (err < 0)
-		return err;
+		goto err1;
 
 	priv->set = set;
 	return 0;
+
+err1:
+	if (priv->expr != NULL)
+		nft_expr_destroy(ctx, priv->expr);
+	return err;
 }
 
 static void nft_dynset_destroy(const struct nft_ctx *ctx,
···
 	struct nft_dynset *priv = nft_expr_priv(expr);
 
 	nf_tables_unbind_set(ctx, priv->set, &priv->binding);
+	if (priv->expr != NULL)
+		nft_expr_destroy(ctx, priv->expr);
 }
 
 static int nft_dynset_dump(struct sk_buff *skb, const struct nft_expr *expr)
 {
 	const struct nft_dynset *priv = nft_expr_priv(expr);
 
-	if (nla_put_be32(skb, NFTA_DYNSET_SREG_KEY, htonl(priv->sreg_key)))
+	if (nft_dump_register(skb, NFTA_DYNSET_SREG_KEY, priv->sreg_key))
 		goto nla_put_failure;
 	if (priv->set->flags & NFT_SET_MAP &&
-	    nla_put_be32(skb, NFTA_DYNSET_SREG_DATA, htonl(priv->sreg_data)))
+	    nft_dump_register(skb, NFTA_DYNSET_SREG_DATA, priv->sreg_data))
 		goto nla_put_failure;
 	if (nla_put_be32(skb, NFTA_DYNSET_OP, htonl(priv->op)))
 		goto nla_put_failure;
 	if (nla_put_string(skb, NFTA_DYNSET_SET_NAME, priv->set->name))
 		goto nla_put_failure;
 	if (nla_put_be64(skb, NFTA_DYNSET_TIMEOUT, cpu_to_be64(priv->timeout)))
+		goto nla_put_failure;
+	if (priv->expr && nft_expr_dump(skb, NFTA_DYNSET_EXPR, priv->expr))
 		goto nla_put_failure;
 	return 0;
 

net/netfilter/nft_expr_template.c

···
-/*
- * Copyright (c) 2008-2009 Patrick McHardy <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Development of this code funded by Astaro AG (http://www.astaro.com/)
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/netlink.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter/nf_tables.h>
-#include <net/netfilter/nf_tables.h>
-
-struct nft_template {
-
-};
-
-static void nft_template_eval(const struct nft_expr *expr,
-			      struct nft_data data[NFT_REG_MAX + 1],
-			      const struct nft_pktinfo *pkt)
-{
-	struct nft_template *priv = nft_expr_priv(expr);
-
-}
-
-static const struct nla_policy nft_template_policy[NFTA_TEMPLATE_MAX + 1] = {
-	[NFTA_TEMPLATE_ATTR]		= { .type = NLA_U32 },
-};
-
-static int nft_template_init(const struct nft_ctx *ctx,
-			   const struct nft_expr *expr,
-			   const struct nlattr * const tb[])
-{
-	struct nft_template *priv = nft_expr_priv(expr);
-
-	return 0;
-}
-
-static void nft_template_destroy(const struct nft_ctx *ctx,
-			       const struct nft_expr *expr)
-{
-	struct nft_template *priv = nft_expr_priv(expr);
-
-}
-
-static int nft_template_dump(struct sk_buff *skb, const struct nft_expr *expr)
-{
-	const struct nft_template *priv = nft_expr_priv(expr);
-
-	NLA_PUT_BE32(skb, NFTA_TEMPLATE_ATTR, priv->field);
-	return 0;
-
-nla_put_failure:
-	return -1;
-}
-
-static struct nft_expr_type nft_template_type;
-static const struct nft_expr_ops nft_template_ops = {
-	.type		= &nft_template_type,
-	.size		= NFT_EXPR_SIZE(sizeof(struct nft_template)),
-	.eval		= nft_template_eval,
-	.init		= nft_template_init,
-	.destroy	= nft_template_destroy,
-	.dump		= nft_template_dump,
-};
-
-static struct nft_expr_type nft_template_type __read_mostly = {
-	.name		= "template",
-	.ops		= &nft_template_ops,
-	.policy		= nft_template_policy,
-	.maxattr	= NFTA_TEMPLATE_MAX,
-	.owner		= THIS_MODULE,
-};
-
-static int __init nft_template_module_init(void)
-{
-	return nft_register_expr(&nft_template_type);
-}
-
-static void __exit nft_template_module_exit(void)
-{
-	nft_unregister_expr(&nft_template_type);
-}
-
-module_init(nft_template_module_init);
-module_exit(nft_template_module_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Patrick McHardy <[e-mail]>");
-MODULE_ALIAS_NFT_EXPR("template");

net/netfilter/nft_exthdr.c

···
 };
 
 static void nft_exthdr_eval(const struct nft_expr *expr,
-			    struct nft_data data[NFT_REG_MAX + 1],
+			    struct nft_regs *regs,
 			    const struct nft_pktinfo *pkt)
 {
 	struct nft_exthdr *priv = nft_expr_priv(expr);
-	struct nft_data *dest = &data[priv->dreg];
+	u32 *dest = &regs->data[priv->dreg];
 	unsigned int offset = 0;
 	int err;
 
···
 		goto err;
 	offset += priv->offset;
 
-	if (skb_copy_bits(pkt->skb, offset, dest->data, priv->len) < 0)
+	dest[priv->len / NFT_REG32_SIZE] = 0;
+	if (skb_copy_bits(pkt->skb, offset, dest, priv->len) < 0)
 		goto err;
 	return;
 err:
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+	regs->verdict.code = NFT_BREAK;
 }
 
 static const struct nla_policy nft_exthdr_policy[NFTA_EXTHDR_MAX + 1] = {
···
 			   const struct nlattr * const tb[])
 {
 	struct nft_exthdr *priv = nft_expr_priv(expr);
-	int err;
 
 	if (tb[NFTA_EXTHDR_DREG] == NULL ||
 	    tb[NFTA_EXTHDR_TYPE] == NULL ||
···
 	priv->type   = nla_get_u8(tb[NFTA_EXTHDR_TYPE]);
 	priv->offset = ntohl(nla_get_be32(tb[NFTA_EXTHDR_OFFSET]));
 	priv->len    = ntohl(nla_get_be32(tb[NFTA_EXTHDR_LEN]));
-	if (priv->len == 0 ||
-	    priv->len > FIELD_SIZEOF(struct nft_data, data))
-		return -EINVAL;
+	priv->dreg   = nft_parse_register(tb[NFTA_EXTHDR_DREG]);
 
-	priv->dreg = ntohl(nla_get_be32(tb[NFTA_EXTHDR_DREG]));
-	err = nft_validate_output_register(priv->dreg);
-	if (err < 0)
-		return err;
-	return nft_validate_data_load(ctx, priv->dreg, NULL, NFT_DATA_VALUE);
+	return nft_validate_register_store(ctx, priv->dreg, NULL,
+					   NFT_DATA_VALUE, priv->len);
 }
 
 static int nft_exthdr_dump(struct sk_buff *skb, const struct nft_expr *expr)
 {
 	const struct nft_exthdr *priv = nft_expr_priv(expr);
 
-	if (nla_put_be32(skb, NFTA_EXTHDR_DREG, htonl(priv->dreg)))
+	if (nft_dump_register(skb, NFTA_EXTHDR_DREG, priv->dreg))
 		goto nla_put_failure;
 	if (nla_put_u8(skb, NFTA_EXTHDR_TYPE, priv->type))
 		goto nla_put_failure;

net/netfilter/nft_hash.c

···
 
 struct nft_hash_cmp_arg {
 	const struct nft_set		*set;
-	const struct nft_data		*key;
+	const u32			*key;
 	u8				genmask;
 };
 
···
 	const struct nft_hash_cmp_arg *x = arg->key;
 	const struct nft_hash_elem *he = ptr;
 
-	if (nft_data_cmp(nft_set_ext_key(&he->ext), x->key, x->set->klen))
+	if (memcmp(nft_set_ext_key(&he->ext), x->key, x->set->klen))
 		return 1;
 	if (nft_set_elem_expired(&he->ext))
 		return 1;
···
 	return 0;
 }
 
-static bool nft_hash_lookup(const struct nft_set *set,
-			    const struct nft_data *key,
+static bool nft_hash_lookup(const struct nft_set *set, const u32 *key,
 			    const struct nft_set_ext **ext)
 {
 	struct nft_hash *priv = nft_set_priv(set);
···
 	return !!he;
 }
 
-static bool nft_hash_update(struct nft_set *set, const struct nft_data *key,
+static bool nft_hash_update(struct nft_set *set, const u32 *key,
 			    void *(*new)(struct nft_set *,
 					 const struct nft_expr *,
-					 struct nft_data []),
+					 struct nft_regs *regs),
 			    const struct nft_expr *expr,
-			    struct nft_data data[],
+			    struct nft_regs *regs,
 			    const struct nft_set_ext **ext)
 {
 	struct nft_hash *priv = nft_set_priv(set);
···
 	if (he != NULL)
 		goto out;
 
-	he = new(set, expr, data);
+	he = new(set, expr, regs);
 	if (he == NULL)
 		goto err1;
 	if (rhashtable_lookup_insert_key(&priv->ht, &arg, &he->node,
···
 	struct nft_hash_cmp_arg arg = {
 		.genmask = nft_genmask_next(read_pnet(&set->pnet)),
 		.set	 = set,
-		.key	 = &elem->key,
+		.key	 = elem->key.val.data,
 	};
 
 	return rhashtable_lookup_insert_key(&priv->ht, &arg, &he->node,
···
 	struct nft_hash_cmp_arg arg = {
 		.genmask = nft_genmask_next(read_pnet(&set->pnet)),
 		.set	 = set,
-		.key	 = &elem->key,
+		.key	 = elem->key.val.data,
 	};
 
 	rcu_read_lock();

net/netfilter/nft_immediate.c

···
 };
 
 static void nft_immediate_eval(const struct nft_expr *expr,
-			       struct nft_data data[NFT_REG_MAX + 1],
+			       struct nft_regs *regs,
 			       const struct nft_pktinfo *pkt)
 {
 	const struct nft_immediate_expr *priv = nft_expr_priv(expr);
 
-	nft_data_copy(&data[priv->dreg], &priv->data);
+	nft_data_copy(&regs->data[priv->dreg], &priv->data, priv->dlen);
 }
 
 static const struct nla_policy nft_immediate_policy[NFTA_IMMEDIATE_MAX + 1] = {
···
 	    tb[NFTA_IMMEDIATE_DATA] == NULL)
 		return -EINVAL;
 
-	priv->dreg = ntohl(nla_get_be32(tb[NFTA_IMMEDIATE_DREG]));
-	err = nft_validate_output_register(priv->dreg);
-	if (err < 0)
-		return err;
-
-	err = nft_data_init(ctx, &priv->data, &desc, tb[NFTA_IMMEDIATE_DATA]);
+	err = nft_data_init(ctx, &priv->data, sizeof(priv->data), &desc,
+			    tb[NFTA_IMMEDIATE_DATA]);
 	if (err < 0)
 		return err;
 	priv->dlen = desc.len;
 
-	err = nft_validate_data_load(ctx, priv->dreg, &priv->data, desc.type);
+	priv->dreg = nft_parse_register(tb[NFTA_IMMEDIATE_DREG]);
+	err = nft_validate_register_store(ctx, priv->dreg, &priv->data,
+					  desc.type, desc.len);
 	if (err < 0)
 		goto err1;
 
···
 {
 	const struct nft_immediate_expr *priv = nft_expr_priv(expr);
 
-	if (nla_put_be32(skb, NFTA_IMMEDIATE_DREG, htonl(priv->dreg)))
+	if (nft_dump_register(skb, NFTA_IMMEDIATE_DREG, priv->dreg))
 		goto nla_put_failure;
 
 	return nft_data_dump(skb, NFTA_IMMEDIATE_DATA, &priv->data,

net/netfilter/nft_limit.c

···
 };
 
 static void nft_limit_eval(const struct nft_expr *expr,
-			   struct nft_data data[NFT_REG_MAX + 1],
+			   struct nft_regs *regs,
 			   const struct nft_pktinfo *pkt)
 {
 	struct nft_limit *priv = nft_expr_priv(expr);
···
 	}
 	spin_unlock_bh(&limit_lock);
 
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+	regs->verdict.code = NFT_BREAK;
 }
 
 static const struct nla_policy nft_limit_policy[NFTA_LIMIT_MAX + 1] = {
···
 	.ops		= &nft_limit_ops,
 	.policy		= nft_limit_policy,
 	.maxattr	= NFTA_LIMIT_MAX,
+	.flags		= NFT_EXPR_STATEFUL,
 	.owner		= THIS_MODULE,
 };
 

net/netfilter/nft_log.c

···
 };
 
 static void nft_log_eval(const struct nft_expr *expr,
-			 struct nft_data data[NFT_REG_MAX + 1],
+			 struct nft_regs *regs,
 			 const struct nft_pktinfo *pkt)
 {
 	const struct nft_log *priv = nft_expr_priv(expr);

net/netfilter/nft_lookup.c

···
 };
 
 static void nft_lookup_eval(const struct nft_expr *expr,
-			    struct nft_data data[NFT_REG_MAX + 1],
+			    struct nft_regs *regs,
 			    const struct nft_pktinfo *pkt)
 {
 	const struct nft_lookup *priv = nft_expr_priv(expr);
 	const struct nft_set *set = priv->set;
 	const struct nft_set_ext *ext;
 
-	if (set->ops->lookup(set, &data[priv->sreg], &ext)) {
+	if (set->ops->lookup(set, &regs->data[priv->sreg], &ext)) {
 		if (set->flags & NFT_SET_MAP)
-			nft_data_copy(&data[priv->dreg], nft_set_ext_data(ext));
+			nft_data_copy(&regs->data[priv->dreg],
+				      nft_set_ext_data(ext), set->dlen);
 		return;
 	}
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+	regs->verdict.code = NFT_BREAK;
 }
 
 static const struct nla_policy nft_lookup_policy[NFTA_LOOKUP_MAX + 1] = {
···
 			return PTR_ERR(set);
 	}
 
-	priv->sreg = ntohl(nla_get_be32(tb[NFTA_LOOKUP_SREG]));
-	err = nft_validate_input_register(priv->sreg);
+	if (set->flags & NFT_SET_EVAL)
+		return -EOPNOTSUPP;
+
+	priv->sreg = nft_parse_register(tb[NFTA_LOOKUP_SREG]);
+	err = nft_validate_register_load(priv->sreg, set->klen);
 	if (err < 0)
 		return err;
 
···
 		if (!(set->flags & NFT_SET_MAP))
 			return -EINVAL;
 
-		priv->dreg = ntohl(nla_get_be32(tb[NFTA_LOOKUP_DREG]));
-		err = nft_validate_output_register(priv->dreg);
+		priv->dreg = nft_parse_register(tb[NFTA_LOOKUP_DREG]);
+		err = nft_validate_register_store(ctx, priv->dreg, NULL,
+						  set->dtype, set->dlen);
 		if (err < 0)
 			return err;
-
-		if (priv->dreg == NFT_REG_VERDICT) {
-			if (set->dtype != NFT_DATA_VERDICT)
-				return -EINVAL;
-		} else if (set->dtype == NFT_DATA_VERDICT)
-			return -EINVAL;
 	} else if (set->flags & NFT_SET_MAP)
 		return -EINVAL;
 
···
 
 	if (nla_put_string(skb, NFTA_LOOKUP_SET, priv->set->name))
 		goto nla_put_failure;
-	if (nla_put_be32(skb, NFTA_LOOKUP_SREG, htonl(priv->sreg)))
+	if (nft_dump_register(skb, NFTA_LOOKUP_SREG, priv->sreg))
 		goto nla_put_failure;
 	if (priv->set->flags & NFT_SET_MAP)
-		if (nla_put_be32(skb, NFTA_LOOKUP_DREG, htonl(priv->dreg)))
+		if (nft_dump_register(skb, NFTA_LOOKUP_DREG, priv->dreg))
 			goto nla_put_failure;
 	return 0;
 

net/netfilter/nft_meta.c

···
 #include <net/netfilter/nft_meta.h>
 
 void nft_meta_get_eval(const struct nft_expr *expr,
-		       struct nft_data data[NFT_REG_MAX + 1],
+		       struct nft_regs *regs,
 		       const struct nft_pktinfo *pkt)
 {
 	const struct nft_meta *priv = nft_expr_priv(expr);
 	const struct sk_buff *skb = pkt->skb;
 	const struct net_device *in = pkt->in, *out = pkt->out;
-	struct nft_data *dest = &data[priv->dreg];
+	u32 *dest = &regs->data[priv->dreg];
 
 	switch (priv->key) {
 	case NFT_META_LEN:
-		dest->data[0] = skb->len;
+		*dest = skb->len;
 		break;
 	case NFT_META_PROTOCOL:
-		*(__be16 *)dest->data = skb->protocol;
+		*dest = 0;
+		*(__be16 *)dest = skb->protocol;
 		break;
 	case NFT_META_NFPROTO:
-		dest->data[0] = pkt->ops->pf;
+		*dest = pkt->ops->pf;
 		break;
 	case NFT_META_L4PROTO:
-		dest->data[0] = pkt->tprot;
+		*dest = pkt->tprot;
 		break;
 	case NFT_META_PRIORITY:
-		dest->data[0] = skb->priority;
+		*dest = skb->priority;
 		break;
 	case NFT_META_MARK:
-		dest->data[0] = skb->mark;
+		*dest = skb->mark;
 		break;
 	case NFT_META_IIF:
 		if (in == NULL)
 			goto err;
-		dest->data[0] = in->ifindex;
+		*dest = in->ifindex;
 		break;
 	case NFT_META_OIF:
 		if (out == NULL)
 			goto err;
-		dest->data[0] = out->ifindex;
+		*dest = out->ifindex;
 		break;
 	case NFT_META_IIFNAME:
 		if (in == NULL)
 			goto err;
-		strncpy((char *)dest->data, in->name, sizeof(dest->data));
+		strncpy((char *)dest, in->name, IFNAMSIZ);
 		break;
 	case NFT_META_OIFNAME:
 		if (out == NULL)
 			goto err;
-		strncpy((char *)dest->data, out->name, sizeof(dest->data));
+		strncpy((char *)dest, out->name, IFNAMSIZ);
 		break;
 	case NFT_META_IIFTYPE:
 		if (in == NULL)
 			goto err;
-		*(u16 *)dest->data = in->type;
+		*dest = 0;
+		*(u16 *)dest = in->type;
 		break;
 	case NFT_META_OIFTYPE:
 		if (out == NULL)
 			goto err;
-		*(u16 *)dest->data = out->type;
+		*dest = 0;
+		*(u16 *)dest = out->type;
 		break;
 	case NFT_META_SKUID:
 		if (skb->sk == NULL || !sk_fullsock(skb->sk))
···
 			goto err;
 		}
 
-		dest->data[0] =
-			from_kuid_munged(&init_user_ns,
+		*dest =	from_kuid_munged(&init_user_ns,
 				skb->sk->sk_socket->file->f_cred->fsuid);
 		read_unlock_bh(&skb->sk->sk_callback_lock);
 		break;
···
 			read_unlock_bh(&skb->sk->sk_callback_lock);
 			goto err;
 		}
-		dest->data[0] =
-			from_kgid_munged(&init_user_ns,
+		*dest =	from_kgid_munged(&init_user_ns,
 				 skb->sk->sk_socket->file->f_cred->fsgid);
 		read_unlock_bh(&skb->sk->sk_callback_lock);
 		break;
···
 
 		if (dst == NULL)
 			goto err;
-		dest->data[0] = dst->tclassid;
+		*dest = dst->tclassid;
 		break;
 	}
 #endif
 #ifdef CONFIG_NETWORK_SECMARK
 	case NFT_META_SECMARK:
-		dest->data[0] = skb->secmark;
+		*dest = skb->secmark;
 		break;
 #endif
 	case NFT_META_PKTTYPE:
 		if (skb->pkt_type != PACKET_LOOPBACK) {
-			dest->data[0] = skb->pkt_type;
+			*dest = skb->pkt_type;
 			break;
 		}
 
 		switch (pkt->ops->pf) {
 		case NFPROTO_IPV4:
 			if (ipv4_is_multicast(ip_hdr(skb)->daddr))
-				dest->data[0] = PACKET_MULTICAST;
+				*dest = PACKET_MULTICAST;
 			else
-				dest->data[0] = PACKET_BROADCAST;
+				*dest = PACKET_BROADCAST;
 			break;
 		case NFPROTO_IPV6:
 			if (ipv6_hdr(skb)->daddr.s6_addr[0] == 0xFF)
-				dest->data[0] = PACKET_MULTICAST;
+				*dest = PACKET_MULTICAST;
 			else
-				dest->data[0] = PACKET_BROADCAST;
+				*dest = PACKET_BROADCAST;
 			break;
 		default:
 			WARN_ON(1);
···
 		}
 		break;
 	case NFT_META_CPU:
-		dest->data[0] = raw_smp_processor_id();
+		*dest = raw_smp_processor_id();
 		break;
 	case NFT_META_IIFGROUP:
 		if (in == NULL)
 			goto err;
-		dest->data[0] = in->group;
+		*dest = in->group;
 		break;
 	case NFT_META_OIFGROUP:
 		if (out == NULL)
 			goto err;
-		dest->data[0] = out->group;
+		*dest = out->group;
 		break;
 	case NFT_META_CGROUP:
 		if (skb->sk == NULL || !sk_fullsock(skb->sk))
 			goto err;
-		dest->data[0] = skb->sk->sk_classid;
+		*dest = skb->sk->sk_classid;
 		break;
 	default:
 		WARN_ON(1);
···
 	return;
 
 err:
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+	regs->verdict.code = NFT_BREAK;
 }
 EXPORT_SYMBOL_GPL(nft_meta_get_eval);
 
 void nft_meta_set_eval(const struct nft_expr *expr,
-		       struct nft_data data[NFT_REG_MAX + 1],
+		       struct nft_regs *regs,
 		       const struct nft_pktinfo *pkt)
 {
 	const struct nft_meta *meta = nft_expr_priv(expr);
 	struct sk_buff *skb = pkt->skb;
-	u32 value = data[meta->sreg].data[0];
+	u32 value = regs->data[meta->sreg];
 
 	switch (meta->key) {
 	case NFT_META_MARK:
···
 		      const struct nlattr * const tb[])
 {
 	struct nft_meta *priv = nft_expr_priv(expr);
-	int err;
+	unsigned int len;
 
 	priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
 	switch (priv->key) {
-	case NFT_META_LEN:
 	case NFT_META_PROTOCOL:
+	case NFT_META_IIFTYPE:
+	case NFT_META_OIFTYPE:
+		len = sizeof(u16);
+		break;
 	case NFT_META_NFPROTO:
 	case NFT_META_L4PROTO:
+	case NFT_META_LEN:
 	case NFT_META_PRIORITY:
 	case NFT_META_MARK:
 	case NFT_META_IIF:
 	case NFT_META_OIF:
-	case NFT_META_IIFNAME:
-	case NFT_META_OIFNAME:
-	case NFT_META_IIFTYPE:
-	case NFT_META_OIFTYPE:
 	case NFT_META_SKUID:
 	case NFT_META_SKGID:
 #ifdef CONFIG_IP_ROUTE_CLASSID
···
 	case NFT_META_IIFGROUP:
 	case NFT_META_OIFGROUP:
 	case NFT_META_CGROUP:
+		len = sizeof(u32);
+		break;
+	case NFT_META_IIFNAME:
+	case NFT_META_OIFNAME:
+		len = IFNAMSIZ;
 		break;
 	default:
 		return -EOPNOTSUPP;
 	}
 
-	priv->dreg = ntohl(nla_get_be32(tb[NFTA_META_DREG]));
-	err = nft_validate_output_register(priv->dreg);
-	if (err < 0)
-		return err;
-
-	err = nft_validate_data_load(ctx, priv->dreg, NULL, NFT_DATA_VALUE);
-	if (err < 0)
-		return err;
-
-	return 0;
+	priv->dreg = nft_parse_register(tb[NFTA_META_DREG]);
+	return nft_validate_register_store(ctx, priv->dreg, NULL,
+					   NFT_DATA_VALUE, len);
 }
 EXPORT_SYMBOL_GPL(nft_meta_get_init);
 
···
 		      const struct nlattr * const tb[])
 {
 	struct nft_meta *priv = nft_expr_priv(expr);
+	unsigned int len;
 	int err;
 
 	priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
 	switch (priv->key) {
 	case NFT_META_MARK:
 	case NFT_META_PRIORITY:
+		len = sizeof(u32);
+		break;
 	case NFT_META_NFTRACE:
+		len = sizeof(u8);
 		break;
 	default:
 		return -EOPNOTSUPP;
 	}
 
-	priv->sreg = ntohl(nla_get_be32(tb[NFTA_META_SREG]));
-	err = nft_validate_input_register(priv->sreg);
+	priv->sreg = nft_parse_register(tb[NFTA_META_SREG]);
+	err = nft_validate_register_load(priv->sreg, len);
 	if (err < 0)
 		return err;
 
···
 
 	if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key)))
 		goto nla_put_failure;
-	if (nla_put_be32(skb, NFTA_META_DREG, htonl(priv->dreg)))
+	if (nft_dump_register(skb, NFTA_META_DREG, priv->dreg))
 		goto nla_put_failure;
 	return 0;
 
···
 
 	if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key)))
 		goto nla_put_failure;
-	if (nla_put_be32(skb, NFTA_META_SREG, htonl(priv->sreg)))
+	if (nft_dump_register(skb, NFTA_META_SREG, priv->sreg))
 		goto nla_put_failure;
 
 	return 0;

net/netfilter/nft_nat.c

···
 };
 
 static void nft_nat_eval(const struct nft_expr *expr,
-			 struct nft_data data[NFT_REG_MAX + 1],
+			 struct nft_regs *regs,
 			 const struct nft_pktinfo *pkt)
 {
 	const struct nft_nat *priv = nft_expr_priv(expr);
···
 	if (priv->sreg_addr_min) {
 		if (priv->family == AF_INET) {
 			range.min_addr.ip = (__force __be32)
-					data[priv->sreg_addr_min].data[0];
+					regs->data[priv->sreg_addr_min];
 			range.max_addr.ip = (__force __be32)
-					data[priv->sreg_addr_max].data[0];
+					regs->data[priv->sreg_addr_max];
 
 		} else {
 			memcpy(range.min_addr.ip6,
-			       data[priv->sreg_addr_min].data,
-			       sizeof(struct nft_data));
+			       &regs->data[priv->sreg_addr_min],
+			       sizeof(range.min_addr.ip6));
 			memcpy(range.max_addr.ip6,
-			       data[priv->sreg_addr_max].data,
-			       sizeof(struct nft_data));
+			       &regs->data[priv->sreg_addr_max],
+			       sizeof(range.max_addr.ip6));
 		}
 		range.flags |= NF_NAT_RANGE_MAP_IPS;
 	}
 
 	if (priv->sreg_proto_min) {
 		range.min_proto.all =
-			*(__be16 *)&data[priv->sreg_proto_min].data[0];
+			*(__be16 *)&regs->data[priv->sreg_proto_min];
 		range.max_proto.all =
-			*(__be16 *)&data[priv->sreg_proto_max].data[0];
+			*(__be16 *)&regs->data[priv->sreg_proto_max];
 		range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
 	}
 
 	range.flags |= priv->flags;
 
-	data[NFT_REG_VERDICT].verdict =
-		nf_nat_setup_info(ct, &range, priv->type);
+	regs->verdict.code = nf_nat_setup_info(ct, &range, priv->type);
 }
 
 static const struct nla_policy nft_nat_policy[NFTA_NAT_MAX + 1] = {
···
 			const struct nlattr * const tb[])
 {
 	struct nft_nat *priv = nft_expr_priv(expr);
+	unsigned int alen, plen;
 	u32 family;
 	int err;
 
···
 		return -EINVAL;
 
 	family = ntohl(nla_get_be32(tb[NFTA_NAT_FAMILY]));
-	if (family != AF_INET && family != AF_INET6)
-		return -EAFNOSUPPORT;
 	if (family != ctx->afi->family)
 		return -EOPNOTSUPP;
+
+	switch (family) {
+	case NFPROTO_IPV4:
+		alen = FIELD_SIZEOF(struct nf_nat_range, min_addr.ip);
+		break;
+	case NFPROTO_IPV6:
+		alen = FIELD_SIZEOF(struct nf_nat_range, min_addr.ip6);
+		break;
+	default:
+		return -EAFNOSUPPORT;
+	}
 	priv->family = family;
 
 	if (tb[NFTA_NAT_REG_ADDR_MIN]) {
 		priv->sreg_addr_min =
-			ntohl(nla_get_be32(tb[NFTA_NAT_REG_ADDR_MIN]));
-
-		err = nft_validate_input_register(priv->sreg_addr_min);
+			nft_parse_register(tb[NFTA_NAT_REG_ADDR_MIN]);
+		err = nft_validate_register_load(priv->sreg_addr_min, alen);
 		if (err < 0)
 			return err;
 
 		if (tb[NFTA_NAT_REG_ADDR_MAX]) {
 			priv->sreg_addr_max =
-				ntohl(nla_get_be32(tb[NFTA_NAT_REG_ADDR_MAX]));
+				nft_parse_register(tb[NFTA_NAT_REG_ADDR_MAX]);
 
-			err = nft_validate_input_register(priv->sreg_addr_max);
+			err = nft_validate_register_load(priv->sreg_addr_max,
+							 alen);
 			if (err < 0)
 				return err;
 		} else {
···
 		}
 	}
 
+	plen = FIELD_SIZEOF(struct nf_nat_range, min_addr.all);
 	if (tb[NFTA_NAT_REG_PROTO_MIN]) {
 		priv->sreg_proto_min =
-			ntohl(nla_get_be32(tb[NFTA_NAT_REG_PROTO_MIN]));
+			nft_parse_register(tb[NFTA_NAT_REG_PROTO_MIN]);
 
-		err = nft_validate_input_register(priv->sreg_proto_min);
+		err = nft_validate_register_load(priv->sreg_proto_min, plen);
 		if (err < 0)
 			return err;
 
 		if (tb[NFTA_NAT_REG_PROTO_MAX]) {
 			priv->sreg_proto_max =
-				ntohl(nla_get_be32(tb[NFTA_NAT_REG_PROTO_MAX]));
+				nft_parse_register(tb[NFTA_NAT_REG_PROTO_MAX]);
 
-			err = nft_validate_input_register(priv->sreg_proto_max);
+			err = nft_validate_register_load(priv->sreg_proto_max,
+							 plen);
 			if (err < 0)
 				return err;
 		} else {
···
 		goto nla_put_failure;
 
 	if (priv->sreg_addr_min) {
-		if (nla_put_be32(skb, NFTA_NAT_REG_ADDR_MIN,
-				 htonl(priv->sreg_addr_min)) ||
-		    nla_put_be32(skb, NFTA_NAT_REG_ADDR_MAX,
-				 htonl(priv->sreg_addr_max)))
+		if (nft_dump_register(skb, NFTA_NAT_REG_ADDR_MIN,
+				      priv->sreg_addr_min) ||
+		    nft_dump_register(skb, NFTA_NAT_REG_ADDR_MAX,
+				      priv->sreg_addr_max))
 			goto nla_put_failure;
 	}
 
 	if (priv->sreg_proto_min) {
-		if (nla_put_be32(skb, NFTA_NAT_REG_PROTO_MIN,
-				 htonl(priv->sreg_proto_min)) ||
-		    nla_put_be32(skb, NFTA_NAT_REG_PROTO_MAX,
-				 htonl(priv->sreg_proto_max)))
+		if (nft_dump_register(skb, NFTA_NAT_REG_PROTO_MIN,
+				      priv->sreg_proto_min) ||
+		    nft_dump_register(skb, NFTA_NAT_REG_PROTO_MAX,
+				      priv->sreg_proto_max))
 			goto nla_put_failure;
 	}
 

net/netfilter/nft_payload.c

···
 #include <net/netfilter/nf_tables.h>
 
 static void nft_payload_eval(const struct nft_expr *expr,
-			     struct nft_data data[NFT_REG_MAX + 1],
+			     struct nft_regs *regs,
 			     const struct nft_pktinfo *pkt)
 {
 	const struct nft_payload *priv = nft_expr_priv(expr);
 	const struct sk_buff *skb = pkt->skb;
-	struct nft_data *dest = &data[priv->dreg];
+	u32 *dest = &regs->data[priv->dreg];
 	int offset;
 
 	switch (priv->base) {
···
 	}
 	offset += priv->offset;
 
-	if (skb_copy_bits(skb, offset, dest->data, priv->len) < 0)
+	dest[priv->len / NFT_REG32_SIZE] = 0;
+	if (skb_copy_bits(skb, offset, dest, priv->len) < 0)
 		goto err;
 	return;
 err:
-	data[NFT_REG_VERDICT].verdict = NFT_BREAK;
+	regs->verdict.code = NFT_BREAK;
 }
 
 static const struct nla_policy nft_payload_policy[NFTA_PAYLOAD_MAX + 1] = {
···
 			    const struct nlattr * const tb[])
 {
 	struct nft_payload *priv = nft_expr_priv(expr);
-	int err;
 
 	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]);
 
-	priv->dreg = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_DREG]));
-	err = nft_validate_output_register(priv->dreg);
-	if (err < 0)
-		return err;
-	return nft_validate_data_load(ctx, priv->dreg, NULL, NFT_DATA_VALUE);
+	return nft_validate_register_store(ctx, priv->dreg, NULL,
+					   NFT_DATA_VALUE, priv->len);
 }
 
 static int nft_payload_dump(struct sk_buff *skb, const struct nft_expr *expr)
 {
 	const struct nft_payload *priv = nft_expr_priv(expr);
 
-	if (nla_put_be32(skb, NFTA_PAYLOAD_DREG, htonl(priv->dreg)) ||
+	if (nft_dump_register(skb, NFTA_PAYLOAD_DREG, priv->dreg) ||
 	    nla_put_be32(skb, NFTA_PAYLOAD_BASE, htonl(priv->base)) ||
 	    nla_put_be32(skb, NFTA_PAYLOAD_OFFSET, htonl(priv->offset)) ||
 	    nla_put_be32(skb, NFTA_PAYLOAD_LEN, htonl(priv->len)))
···
 	}
 
 	offset = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_OFFSET]));
-	len = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_LEN]));
-	if (len == 0 || len > FIELD_SIZEOF(struct nft_data, data))
-		return ERR_PTR(-EINVAL);
+	len    = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_LEN]));
 
 	if (len <= 4 && is_power_of_2(len) && IS_ALIGNED(offset, len) &&
 	    base != NFT_PAYLOAD_LL_HEADER)

net/netfilter/nft_queue.c

···
 };
 
 static void nft_queue_eval(const struct nft_expr *expr,
-			   struct nft_data data[NFT_REG_MAX + 1],
+			   struct nft_regs *regs,
 			   const struct nft_pktinfo *pkt)
 {
 	struct nft_queue *priv = nft_expr_priv(expr);
···
 	if (priv->flags & NFT_QUEUE_FLAG_BYPASS)
 		ret |= NF_VERDICT_FLAG_QUEUE_BYPASS;
 
-	data[NFT_REG_VERDICT].verdict = ret;
+	regs->verdict.code = ret;
 }
 
 static const struct nla_policy nft_queue_policy[NFTA_QUEUE_MAX + 1] = {

net/netfilter/nft_rbtree.c

···
 };
 
 
-static bool nft_rbtree_lookup(const struct nft_set *set,
-			      const struct nft_data *key,
+static bool nft_rbtree_lookup(const struct nft_set *set, const u32 *key,
 			      const struct nft_set_ext **ext)
 {
 	const struct nft_rbtree *priv = nft_set_priv(set);
···
 	while (parent != NULL) {
 		rbe = rb_entry(parent, struct nft_rbtree_elem, node);
 
-		d = nft_data_cmp(nft_set_ext_key(&rbe->ext), key, set->klen);
+		d = memcmp(nft_set_ext_key(&rbe->ext), key, set->klen);
 		if (d < 0) {
 			parent = parent->rb_left;
 			interval = rbe;
···
 	while (*p != NULL) {
 		parent = *p;
 		rbe = rb_entry(parent, struct nft_rbtree_elem, node);
-		d = nft_data_cmp(nft_set_ext_key(&rbe->ext),
-				 nft_set_ext_key(&new->ext),
-				 set->klen);
+		d = memcmp(nft_set_ext_key(&rbe->ext),
+			   nft_set_ext_key(&new->ext),
+			   set->klen);
 		if (d < 0)
 			p = &parent->rb_left;
 		else if (d > 0)
···
 	while (parent != NULL) {
 		rbe = rb_entry(parent, struct nft_rbtree_elem, node);
 
-		d = nft_data_cmp(nft_set_ext_key(&rbe->ext), &elem->key,
-				 set->klen);
+		d = memcmp(nft_set_ext_key(&rbe->ext), &elem->key.val,
+					   set->klen);
 		if (d < 0)
 			parent = parent->rb_left;
 		else if (d > 0)

net/netfilter/nft_redir.c

···
 		   const struct nlattr * const tb[])
 {
 	struct nft_redir *priv = nft_expr_priv(expr);
+	unsigned int plen;
 	int err;
 
 	err = nft_redir_validate(ctx, expr, NULL);
 	if (err < 0)
 		return err;
 
+	plen = FIELD_SIZEOF(struct nf_nat_range, min_addr.all);
 	if (tb[NFTA_REDIR_REG_PROTO_MIN]) {
 		priv->sreg_proto_min =
-			ntohl(nla_get_be32(tb[NFTA_REDIR_REG_PROTO_MIN]));
+			nft_parse_register(tb[NFTA_REDIR_REG_PROTO_MIN]);
 
-		err = nft_validate_input_register(priv->sreg_proto_min);
+		err = nft_validate_register_load(priv->sreg_proto_min, plen);
 		if (err < 0)
 			return err;
 
 		if (tb[NFTA_REDIR_REG_PROTO_MAX]) {
 			priv->sreg_proto_max =
-				ntohl(nla_get_be32(tb[NFTA_REDIR_REG_PROTO_MAX]));
+				nft_parse_register(tb[NFTA_REDIR_REG_PROTO_MAX]);
 
-			err = nft_validate_input_register(priv->sreg_proto_max);
+			err = nft_validate_register_load(priv->sreg_proto_max,
+							 plen);
 			if (err < 0)
 				return err;
 		} else {
···
 	const struct nft_redir *priv = nft_expr_priv(expr);
 
 	if (priv->sreg_proto_min) {
-		if (nla_put_be32(skb, NFTA_REDIR_REG_PROTO_MIN,
-				 htonl(priv->sreg_proto_min)))
+		if (nft_dump_register(skb, NFTA_REDIR_REG_PROTO_MIN,
+				      priv->sreg_proto_min))
 			goto nla_put_failure;
-		if (nla_put_be32(skb, NFTA_REDIR_REG_PROTO_MAX,
-				 htonl(priv->sreg_proto_max)))
+		if (nft_dump_register(skb, NFTA_REDIR_REG_PROTO_MAX,
+				      priv->sreg_proto_max))
 			goto nla_put_failure;
 	}
 

net/netfilter/nft_reject_inet.c

···
 #include <net/netfilter/ipv6/nf_reject.h>
 
 static void nft_reject_inet_eval(const struct nft_expr *expr,
-				 struct nft_data data[NFT_REG_MAX + 1],
+				 struct nft_regs *regs,
 				 const struct nft_pktinfo *pkt)
 {
 	struct nft_reject *priv = nft_expr_priv(expr);
···
 		}
 		break;
 	}
-	data[NFT_REG_VERDICT].verdict = NF_DROP;
+
+	regs->verdict.code = NF_DROP;
 }
 
 static int nft_reject_inet_init(const struct nft_ctx *ctx,