[linux-block.git] / net / netfilter / nft_cmp.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
 *
 * Development of this code funded by Astaro AG (http://www.astaro.com/)
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/if_arp.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables_core.h>
#include <net/netfilter/nf_tables_offload.h>
#include <net/netfilter/nf_tables.h>

struct nft_cmp_expr {
	struct nft_data		data;
	u8			sreg;
	u8			len;
	enum nft_cmp_ops	op:8;
};

void nft_cmp_eval(const struct nft_expr *expr,
		  struct nft_regs *regs,
		  const struct nft_pktinfo *pkt)
{
	const struct nft_cmp_expr *priv = nft_expr_priv(expr);
	int d;

	d = memcmp(&regs->data[priv->sreg], &priv->data, priv->len);
	switch (priv->op) {
	case NFT_CMP_EQ:
		if (d != 0)
			goto mismatch;
		break;
	case NFT_CMP_NEQ:
		if (d == 0)
			goto mismatch;
		break;
	case NFT_CMP_LT:
		if (d == 0)
			goto mismatch;
		fallthrough;
	case NFT_CMP_LTE:
		if (d > 0)
			goto mismatch;
		break;
	case NFT_CMP_GT:
		if (d == 0)
			goto mismatch;
		fallthrough;
	case NFT_CMP_GTE:
		if (d < 0)
			goto mismatch;
		break;
	}
	return;

mismatch:
	regs->verdict.code = NFT_BREAK;
}

static const struct nla_policy nft_cmp_policy[NFTA_CMP_MAX + 1] = {
	[NFTA_CMP_SREG]		= { .type = NLA_U32 },
	[NFTA_CMP_OP]		= { .type = NLA_U32 },
	[NFTA_CMP_DATA]		= { .type = NLA_NESTED },
};

static int nft_cmp_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
			const struct nlattr * const tb[])
{
	struct nft_cmp_expr *priv = nft_expr_priv(expr);
	struct nft_data_desc desc;
	int err;

	err = nft_data_init(NULL, &priv->data, sizeof(priv->data), &desc,
			    tb[NFTA_CMP_DATA]);
	if (err < 0)
		return err;

	if (desc.type != NFT_DATA_VALUE) {
		err = -EINVAL;
		nft_data_release(&priv->data, desc.type);
		return err;
	}

	err = nft_parse_register_load(tb[NFTA_CMP_SREG], &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;
}

static int nft_cmp_dump(struct sk_buff *skb, const struct nft_expr *expr)
{
	const struct nft_cmp_expr *priv = nft_expr_priv(expr);

	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;

	if (nft_data_dump(skb, NFTA_CMP_DATA, &priv->data,
			  NFT_DATA_VALUE, priv->len) < 0)
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

union nft_cmp_offload_data {
	u16	val16;
	u32	val32;
	u64	val64;
};

static void nft_payload_n2h(union nft_cmp_offload_data *data,
			    const u8 *val, u32 len)
{
	switch (len) {
	case 2:
		data->val16 = ntohs(*((u16 *)val));
		break;
	case 4:
		data->val32 = ntohl(*((u32 *)val));
		break;
	case 8:
		data->val64 = be64_to_cpu(*((u64 *)val));
		break;
	default:
		WARN_ON_ONCE(1);
		break;
	}
}

static int __nft_cmp_offload(struct nft_offload_ctx *ctx,
			     struct nft_flow_rule *flow,
			     const struct nft_cmp_expr *priv)
{
	struct nft_offload_reg *reg = &ctx->regs[priv->sreg];
	union nft_cmp_offload_data _data, _datamask;
	u8 *mask = (u8 *)&flow->match.mask;
	u8 *key = (u8 *)&flow->match.key;
	u8 *data, *datamask;

	if (priv->op != NFT_CMP_EQ || priv->len > reg->len)
		return -EOPNOTSUPP;

	if (reg->flags & NFT_OFFLOAD_F_NETWORK2HOST) {
		nft_payload_n2h(&_data, (u8 *)&priv->data, reg->len);
		nft_payload_n2h(&_datamask, (u8 *)&reg->mask, reg->len);
		data = (u8 *)&_data;
		datamask = (u8 *)&_datamask;
	} else {
		data = (u8 *)&priv->data;
		datamask = (u8 *)&reg->mask;
	}

	memcpy(key + reg->offset, data, reg->len);
	memcpy(mask + reg->offset, datamask, reg->len);

	flow->match.dissector.used_keys |= BIT(reg->key);
	flow->match.dissector.offset[reg->key] = reg->base_offset;

	if (reg->key == FLOW_DISSECTOR_KEY_META &&
	    reg->offset == offsetof(struct nft_flow_key, meta.ingress_iftype) &&
	    nft_reg_load16(priv->data.data) != ARPHRD_ETHER)
		return -EOPNOTSUPP;

	nft_offload_update_dependency(ctx, &priv->data, reg->len);

	return 0;
}

static int nft_cmp_offload(struct nft_offload_ctx *ctx,
			   struct nft_flow_rule *flow,
			   const struct nft_expr *expr)
{
	const struct nft_cmp_expr *priv = nft_expr_priv(expr);

	return __nft_cmp_offload(ctx, flow, priv);
}

static const struct nft_expr_ops nft_cmp_ops = {
	.type		= &nft_cmp_type,
	.size		= NFT_EXPR_SIZE(sizeof(struct nft_cmp_expr)),
	.eval		= nft_cmp_eval,
	.init		= nft_cmp_init,
	.dump		= nft_cmp_dump,
	.offload	= nft_cmp_offload,
};

static int nft_cmp_fast_init(const struct nft_ctx *ctx,
			     const struct nft_expr *expr,
			     const struct nlattr * const tb[])
{
	struct nft_cmp_fast_expr *priv = nft_expr_priv(expr);
	struct nft_data_desc desc;
	struct nft_data data;
	int err;

	err = nft_data_init(NULL, &data, sizeof(data), &desc,
			    tb[NFTA_CMP_DATA]);
	if (err < 0)
		return err;

	err = nft_parse_register_load(tb[NFTA_CMP_SREG], &priv->sreg, desc.len);
	if (err < 0)
		return err;

	desc.len *= BITS_PER_BYTE;

	priv->mask = nft_cmp_fast_mask(desc.len);
	priv->data = data.data[0] & priv->mask;
	priv->len  = desc.len;
	priv->inv  = ntohl(nla_get_be32(tb[NFTA_CMP_OP])) != NFT_CMP_EQ;
	return 0;
}

static int nft_cmp_fast_offload(struct nft_offload_ctx *ctx,
				struct nft_flow_rule *flow,
				const struct nft_expr *expr)
{
	const struct nft_cmp_fast_expr *priv = nft_expr_priv(expr);
	struct nft_cmp_expr cmp = {
		.data	= {
			.data	= {
				[0] = priv->data,
			},
		},
		.sreg	= priv->sreg,
		.len	= priv->len / BITS_PER_BYTE,
		.op	= priv->inv ? NFT_CMP_NEQ : NFT_CMP_EQ,
	};

	return __nft_cmp_offload(ctx, flow, &cmp);
}

static int nft_cmp_fast_dump(struct sk_buff *skb, const struct nft_expr *expr)
{
	const struct nft_cmp_fast_expr *priv = nft_expr_priv(expr);
	enum nft_cmp_ops op = priv->inv ? NFT_CMP_NEQ : NFT_CMP_EQ;
	struct nft_data data;

	if (nft_dump_register(skb, NFTA_CMP_SREG, priv->sreg))
		goto nla_put_failure;
	if (nla_put_be32(skb, NFTA_CMP_OP, htonl(op)))
		goto nla_put_failure;

	data.data[0] = priv->data;
	if (nft_data_dump(skb, NFTA_CMP_DATA, &data,
			  NFT_DATA_VALUE, priv->len / BITS_PER_BYTE) < 0)
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

const struct nft_expr_ops nft_cmp_fast_ops = {
	.type		= &nft_cmp_type,
	.size		= NFT_EXPR_SIZE(sizeof(struct nft_cmp_fast_expr)),
	.eval		= NULL,	/* inlined */
	.init		= nft_cmp_fast_init,
	.dump		= nft_cmp_fast_dump,
	.offload	= nft_cmp_fast_offload,
};

static const struct nft_expr_ops *
nft_cmp_select_ops(const struct nft_ctx *ctx, const struct nlattr * const tb[])
{
	struct nft_data_desc desc;
	struct nft_data data;
	enum nft_cmp_ops op;
	int err;

	if (tb[NFTA_CMP_SREG] == NULL ||
	    tb[NFTA_CMP_OP] == NULL ||
	    tb[NFTA_CMP_DATA] == NULL)
		return ERR_PTR(-EINVAL);

	op = ntohl(nla_get_be32(tb[NFTA_CMP_OP]));
	switch (op) {
	case NFT_CMP_EQ:
	case NFT_CMP_NEQ:
	case NFT_CMP_LT:
	case NFT_CMP_LTE:
	case NFT_CMP_GT:
	case NFT_CMP_GTE:
		break;
	default:
		return ERR_PTR(-EINVAL);
	}

	err = nft_data_init(NULL, &data, sizeof(data), &desc,
			    tb[NFTA_CMP_DATA]);
	if (err < 0)
		return ERR_PTR(err);

	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;

	return &nft_cmp_ops;
err1:
	nft_data_release(&data, desc.type);
	return ERR_PTR(-EINVAL);
}

struct nft_expr_type nft_cmp_type __read_mostly = {
	.name		= "cmp",
	.select_ops	= nft_cmp_select_ops,
	.policy		= nft_cmp_policy,
	.maxattr	= NFTA_CMP_MAX,
	.owner		= THIS_MODULE,
};
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
96518518	2	/*
ef1f7df9	3	* Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
96518518	4	*
96518518 PM	5	* Development of this code funded by Astaro AG (http://www.astaro.com/)
	6	*/
	7
	8	#include <linux/kernel.h>
	9	#include <linux/init.h>
	10	#include <linux/module.h>
	11	#include <linux/netlink.h>
	12	#include <linux/netfilter.h>
8819efc9	13	#include <linux/if_arp.h>
96518518 PM	14	#include <linux/netfilter/nf_tables.h>
96518518 PM	15	#include <net/netfilter/nf_tables_core.h>
c9626a2c	16	#include <net/netfilter/nf_tables_offload.h>
96518518 PM	17	#include <net/netfilter/nf_tables.h>
	18
	19	struct nft_cmp_expr {
	20	struct nft_data data;
4f16d25c	21	u8 sreg;
96518518 PM	22	u8 len;
	23	enum nft_cmp_ops op:8;
	24	};
	25
10870dd8 FW	26	void nft_cmp_eval(const struct nft_expr *expr,
	27	struct nft_regs *regs,
	28	const struct nft_pktinfo *pkt)
96518518 PM	29	{
	30	const struct nft_cmp_expr *priv = nft_expr_priv(expr);
	31	int d;
	32
e562d860	33	d = memcmp(&regs->data[priv->sreg], &priv->data, priv->len);
96518518 PM	34	switch (priv->op) {
	35	case NFT_CMP_EQ:
	36	if (d != 0)
	37	goto mismatch;
	38	break;
	39	case NFT_CMP_NEQ:
	40	if (d == 0)
	41	goto mismatch;
	42	break;
	43	case NFT_CMP_LT:
	44	if (d == 0)
	45	goto mismatch;
954d8297	46	fallthrough;
96518518 PM	47	case NFT_CMP_LTE:
	48	if (d > 0)
	49	goto mismatch;
	50	break;
	51	case NFT_CMP_GT:
	52	if (d == 0)
	53	goto mismatch;
954d8297	54	fallthrough;
96518518 PM	55	case NFT_CMP_GTE:
	56	if (d < 0)
	57	goto mismatch;
	58	break;
	59	}
	60	return;
	61
	62	mismatch:
a55e22e9	63	regs->verdict.code = NFT_BREAK;
96518518 PM	64	}
	65
	66	static const struct nla_policy nft_cmp_policy[NFTA_CMP_MAX + 1] = {
	67	[NFTA_CMP_SREG] = { .type = NLA_U32 },
	68	[NFTA_CMP_OP] = { .type = NLA_U32 },
	69	[NFTA_CMP_DATA] = { .type = NLA_NESTED },
	70	};
	71
	72	static int nft_cmp_init(const struct nft_ctx ctx, const struct nft_expr expr,
	73	const struct nlattr * const tb[])
	74	{
	75	struct nft_cmp_expr *priv = nft_expr_priv(expr);
	76	struct nft_data_desc desc;
	77	int err;
	78
d0a11fc3 PM	79	err = nft_data_init(NULL, &priv->data, sizeof(priv->data), &desc,
d0a11fc3 PM	80	tb[NFTA_CMP_DATA]);
fa5950e4 FW	81	if (err < 0)
fa5950e4 FW	82	return err;
96518518	83
0d2c96af PNA	84	if (desc.type != NFT_DATA_VALUE) {
	85	err = -EINVAL;
	86	nft_data_release(&priv->data, desc.type);
	87	return err;
	88	}
	89
4f16d25c	90	err = nft_parse_register_load(tb[NFTA_CMP_SREG], &priv->sreg, desc.len);
d07db988 PM	91	if (err < 0)
	92	return err;
	93
	94	priv->op = ntohl(nla_get_be32(tb[NFTA_CMP_OP]));
96518518 PM	95	priv->len = desc.len;
	96	return 0;
	97	}
	98
	99	static int nft_cmp_dump(struct sk_buff skb, const struct nft_expr expr)
	100	{
	101	const struct nft_cmp_expr *priv = nft_expr_priv(expr);
	102
b1c96ed3	103	if (nft_dump_register(skb, NFTA_CMP_SREG, priv->sreg))
96518518 PM	104	goto nla_put_failure;
	105	if (nla_put_be32(skb, NFTA_CMP_OP, htonl(priv->op)))
	106	goto nla_put_failure;
	107
	108	if (nft_data_dump(skb, NFTA_CMP_DATA, &priv->data,
	109	NFT_DATA_VALUE, priv->len) < 0)
	110	goto nla_put_failure;
	111	return 0;
	112
	113	nla_put_failure:
	114	return -1;
	115	}
	116
ff4d90a8 PNA	117	union nft_cmp_offload_data {
	118	u16 val16;
	119	u32 val32;
	120	u64 val64;
	121	};
	122
	123	static void nft_payload_n2h(union nft_cmp_offload_data *data,
	124	const u8 *val, u32 len)
	125	{
	126	switch (len) {
	127	case 2:
	128	data->val16 = ntohs(((u16 )val));
	129	break;
	130	case 4:
	131	data->val32 = ntohl(((u32 )val));
	132	break;
	133	case 8:
	134	data->val64 = be64_to_cpu(((u64 )val));
	135	break;
	136	default:
	137	WARN_ON_ONCE(1);
	138	break;
	139	}
	140	}
	141
c9626a2c PNA	142	static int __nft_cmp_offload(struct nft_offload_ctx *ctx,
	143	struct nft_flow_rule *flow,
	144	const struct nft_cmp_expr *priv)
	145	{
	146	struct nft_offload_reg *reg = &ctx->regs[priv->sreg];
ff4d90a8	147	union nft_cmp_offload_data _data, _datamask;
c9626a2c PNA	148	u8 mask = (u8 )&flow->match.mask;
c9626a2c PNA	149	u8 key = (u8 )&flow->match.key;
ff4d90a8	150	u8 data, datamask;
c9626a2c	151
a5d45bc0	152	if (priv->op != NFT_CMP_EQ \|\| priv->len > reg->len)
c9626a2c PNA	153	return -EOPNOTSUPP;
c9626a2c PNA	154
ff4d90a8 PNA	155	if (reg->flags & NFT_OFFLOAD_F_NETWORK2HOST) {
	156	nft_payload_n2h(&_data, (u8 *)&priv->data, reg->len);
	157	nft_payload_n2h(&_datamask, (u8 *)&reg->mask, reg->len);
	158	data = (u8 *)&_data;
	159	datamask = (u8 *)&_datamask;
	160	} else {
	161	data = (u8 *)&priv->data;
	162	datamask = (u8 *)&reg->mask;
	163	}
	164
	165	memcpy(key + reg->offset, data, reg->len);
	166	memcpy(mask + reg->offset, datamask, reg->len);
c9626a2c PNA	167
	168	flow->match.dissector.used_keys \|= BIT(reg->key);
	169	flow->match.dissector.offset[reg->key] = reg->base_offset;
	170
8819efc9 PNA	171	if (reg->key == FLOW_DISSECTOR_KEY_META &&
	172	reg->offset == offsetof(struct nft_flow_key, meta.ingress_iftype) &&
	173	nft_reg_load16(priv->data.data) != ARPHRD_ETHER)
	174	return -EOPNOTSUPP;
	175
a5d45bc0	176	nft_offload_update_dependency(ctx, &priv->data, reg->len);
c9626a2c PNA	177
	178	return 0;
	179	}
	180
	181	static int nft_cmp_offload(struct nft_offload_ctx *ctx,
	182	struct nft_flow_rule *flow,
	183	const struct nft_expr *expr)
	184	{
	185	const struct nft_cmp_expr *priv = nft_expr_priv(expr);
	186
	187	return __nft_cmp_offload(ctx, flow, priv);
	188	}
	189
ef1f7df9 PM	190	static const struct nft_expr_ops nft_cmp_ops = {
ef1f7df9 PM	191	.type = &nft_cmp_type,
96518518	192	.size = NFT_EXPR_SIZE(sizeof(struct nft_cmp_expr)),
96518518 PM	193	.eval = nft_cmp_eval,
	194	.init = nft_cmp_init,
	195	.dump = nft_cmp_dump,
c9626a2c	196	.offload = nft_cmp_offload,
ef1f7df9 PM	197	};
ef1f7df9 PM	198
cb7dbfd0 PM	199	static int nft_cmp_fast_init(const struct nft_ctx *ctx,
	200	const struct nft_expr *expr,
	201	const struct nlattr * const tb[])
	202	{
	203	struct nft_cmp_fast_expr *priv = nft_expr_priv(expr);
	204	struct nft_data_desc desc;
	205	struct nft_data data;
cb7dbfd0 PM	206	int err;
cb7dbfd0 PM	207
d0a11fc3 PM	208	err = nft_data_init(NULL, &data, sizeof(data), &desc,
d0a11fc3 PM	209	tb[NFTA_CMP_DATA]);
fa5950e4 FW	210	if (err < 0)
fa5950e4 FW	211	return err;
cb7dbfd0	212
4f16d25c	213	err = nft_parse_register_load(tb[NFTA_CMP_SREG], &priv->sreg, desc.len);
d07db988 PM	214	if (err < 0)
	215	return err;
	216
	217	desc.len *= BITS_PER_BYTE;
d07db988	218
5f48846d PS	219	priv->mask = nft_cmp_fast_mask(desc.len);
5f48846d PS	220	priv->data = data.data[0] & priv->mask;
cb7dbfd0	221	priv->len = desc.len;
5f48846d	222	priv->inv = ntohl(nla_get_be32(tb[NFTA_CMP_OP])) != NFT_CMP_EQ;
cb7dbfd0 PM	223	return 0;
	224	}
	225
c9626a2c PNA	226	static int nft_cmp_fast_offload(struct nft_offload_ctx *ctx,
	227	struct nft_flow_rule *flow,
	228	const struct nft_expr *expr)
	229	{
	230	const struct nft_cmp_fast_expr *priv = nft_expr_priv(expr);
	231	struct nft_cmp_expr cmp = {
	232	.data = {
	233	.data = {
	234	[0] = priv->data,
	235	},
	236	},
	237	.sreg = priv->sreg,
	238	.len = priv->len / BITS_PER_BYTE,
5f48846d	239	.op = priv->inv ? NFT_CMP_NEQ : NFT_CMP_EQ,
c9626a2c PNA	240	};
	241
	242	return __nft_cmp_offload(ctx, flow, &cmp);
	243	}
	244
cb7dbfd0 PM	245	static int nft_cmp_fast_dump(struct sk_buff skb, const struct nft_expr expr)
	246	{
	247	const struct nft_cmp_fast_expr *priv = nft_expr_priv(expr);
5f48846d	248	enum nft_cmp_ops op = priv->inv ? NFT_CMP_NEQ : NFT_CMP_EQ;
cb7dbfd0 PM	249	struct nft_data data;
cb7dbfd0 PM	250
b1c96ed3	251	if (nft_dump_register(skb, NFTA_CMP_SREG, priv->sreg))
cb7dbfd0	252	goto nla_put_failure;
5f48846d	253	if (nla_put_be32(skb, NFTA_CMP_OP, htonl(op)))
cb7dbfd0 PM	254	goto nla_put_failure;
	255
	256	data.data[0] = priv->data;
	257	if (nft_data_dump(skb, NFTA_CMP_DATA, &data,
	258	NFT_DATA_VALUE, priv->len / BITS_PER_BYTE) < 0)
	259	goto nla_put_failure;
	260	return 0;
	261
	262	nla_put_failure:
	263	return -1;
	264	}
	265
	266	const struct nft_expr_ops nft_cmp_fast_ops = {
	267	.type = &nft_cmp_type,
	268	.size = NFT_EXPR_SIZE(sizeof(struct nft_cmp_fast_expr)),
	269	.eval = NULL, /* inlined */
	270	.init = nft_cmp_fast_init,
	271	.dump = nft_cmp_fast_dump,
c9626a2c	272	.offload = nft_cmp_fast_offload,
cb7dbfd0 PM	273	};
cb7dbfd0 PM	274
0ca743a5 PNA	275	static const struct nft_expr_ops *
0ca743a5 PNA	276	nft_cmp_select_ops(const struct nft_ctx ctx, const struct nlattr const tb[])
cb7dbfd0 PM	277	{
	278	struct nft_data_desc desc;
	279	struct nft_data data;
cb7dbfd0 PM	280	enum nft_cmp_ops op;
	281	int err;
	282
	283	if (tb[NFTA_CMP_SREG] == NULL \|\|
	284	tb[NFTA_CMP_OP] == NULL \|\|
	285	tb[NFTA_CMP_DATA] == NULL)
	286	return ERR_PTR(-EINVAL);
	287
cb7dbfd0 PM	288	op = ntohl(nla_get_be32(tb[NFTA_CMP_OP]));
	289	switch (op) {
	290	case NFT_CMP_EQ:
	291	case NFT_CMP_NEQ:
	292	case NFT_CMP_LT:
	293	case NFT_CMP_LTE:
	294	case NFT_CMP_GT:
	295	case NFT_CMP_GTE:
	296	break;
	297	default:
	298	return ERR_PTR(-EINVAL);
	299	}
	300
d0a11fc3 PM	301	err = nft_data_init(NULL, &data, sizeof(data), &desc,
d0a11fc3 PM	302	tb[NFTA_CMP_DATA]);
cb7dbfd0 PM	303	if (err < 0)
	304	return ERR_PTR(err);
	305
626899a0	306	if (desc.type != NFT_DATA_VALUE)
71df14b0	307	goto err1;
71df14b0	308
5f48846d	309	if (desc.len <= sizeof(u32) && (op == NFT_CMP_EQ \|\| op == NFT_CMP_NEQ))
cb7dbfd0	310	return &nft_cmp_fast_ops;
71df14b0 PNA	311
	312	return &nft_cmp_ops;
	313	err1:
59105446	314	nft_data_release(&data, desc.type);
71df14b0	315	return ERR_PTR(-EINVAL);
cb7dbfd0 PM	316	}
cb7dbfd0 PM	317
4e24877e	318	struct nft_expr_type nft_cmp_type __read_mostly = {
ef1f7df9	319	.name = "cmp",
cb7dbfd0	320	.select_ops = nft_cmp_select_ops,
96518518 PM	321	.policy = nft_cmp_policy,
96518518 PM	322	.maxattr = NFTA_CMP_MAX,
ef1f7df9	323	.owner = THIS_MODULE,
96518518	324	};