[mirror_ubuntu-jammy-kernel.git] / net / netfilter / nft_dynset.c

/*
 * Copyright (c) 2015 Patrick McHardy <kaber@trash.net>
 *
 * 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.
 *
 */

#include <linux/kernel.h>
#include <linux/module.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>
#include <net/netfilter/nf_tables_core.h>

struct nft_dynset {
	struct nft_set			*set;
	struct nft_set_ext_tmpl		tmpl;
	enum nft_dynset_ops		op:8;
	enum nft_registers		sreg_key:8;
	enum nft_registers		sreg_data:8;
	bool				invert;
	u64				timeout;
	struct nft_expr			*expr;
	struct nft_set_binding		binding;
};

static int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
{
	int err;

	if (src->ops->clone) {
		dst->ops = src->ops;
		err = src->ops->clone(dst, src);
		if (err < 0)
			return err;
	} else {
		memcpy(dst, src, src->ops->size);
	}

	__module_get(src->ops->type->owner);
	return 0;
}

static void *nft_dynset_new(struct nft_set *set, const struct nft_expr *expr,
			    struct nft_regs *regs)
{
	const struct nft_dynset *priv = nft_expr_priv(expr);
	struct nft_set_ext *ext;
	u64 timeout;
	void *elem;

	if (!atomic_add_unless(&set->nelems, 1, set->size))
		return NULL;

	timeout = priv->timeout ? : set->timeout;
	elem = nft_set_elem_init(set, &priv->tmpl,
				 &regs->data[priv->sreg_key],
				 &regs->data[priv->sreg_data],
				 timeout, GFP_ATOMIC);
	if (elem == NULL)
		goto err1;

	ext = nft_set_elem_ext(set, elem);
	if (priv->expr != NULL &&
	    nft_expr_clone(nft_set_ext_expr(ext), priv->expr) < 0)
		goto err2;

	return elem;

err2:
	nft_set_elem_destroy(set, elem, false);
err1:
	if (set->size)
		atomic_dec(&set->nelems);
	return NULL;
}

void nft_dynset_eval(const struct nft_expr *expr,
		     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, &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) = get_jiffies_64() + timeout;
		}

		if (sexpr != NULL)
			sexpr->ops->eval(sexpr, regs, pkt);

		if (priv->invert)
			regs->verdict.code = NFT_BREAK;
		return;
	}

	if (!priv->invert)
		regs->verdict.code = NFT_BREAK;
}

static const struct nla_policy nft_dynset_policy[NFTA_DYNSET_MAX + 1] = {
	[NFTA_DYNSET_SET_NAME]	= { .type = NLA_STRING,
				    .len = NFT_SET_MAXNAMELEN - 1 },
	[NFTA_DYNSET_SET_ID]	= { .type = NLA_U32 },
	[NFTA_DYNSET_OP]	= { .type = NLA_U32 },
	[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 },
	[NFTA_DYNSET_FLAGS]	= { .type = NLA_U32 },
};

static int nft_dynset_init(const struct nft_ctx *ctx,
			   const struct nft_expr *expr,
			   const struct nlattr * const tb[])
{
	struct nft_dynset *priv = nft_expr_priv(expr);
	u8 genmask = nft_genmask_next(ctx->net);
	struct nft_set *set;
	u64 timeout;
	int err;

	lockdep_assert_held(&ctx->net->nft.commit_mutex);

	if (tb[NFTA_DYNSET_SET_NAME] == NULL ||
	    tb[NFTA_DYNSET_OP] == NULL ||
	    tb[NFTA_DYNSET_SREG_KEY] == NULL)
		return -EINVAL;

	if (tb[NFTA_DYNSET_FLAGS]) {
		u32 flags = ntohl(nla_get_be32(tb[NFTA_DYNSET_FLAGS]));

		if (flags & ~NFT_DYNSET_F_INV)
			return -EINVAL;
		if (flags & NFT_DYNSET_F_INV)
			priv->invert = true;
	}

	set = nft_set_lookup_global(ctx->net, ctx->table,
				    tb[NFTA_DYNSET_SET_NAME],
				    tb[NFTA_DYNSET_SET_ID], genmask);
	if (IS_ERR(set))
		return PTR_ERR(set);

	if (set->ops->update == NULL)
		return -EOPNOTSUPP;

	if (set->flags & NFT_SET_CONSTANT)
		return -EBUSY;

	priv->op = ntohl(nla_get_be32(tb[NFTA_DYNSET_OP]));
	switch (priv->op) {
	case NFT_DYNSET_OP_ADD:
		break;
	case NFT_DYNSET_OP_UPDATE:
		if (!(set->flags & NFT_SET_TIMEOUT))
			return -EOPNOTSUPP;
		break;
	default:
		return -EOPNOTSUPP;
	}

	timeout = 0;
	if (tb[NFTA_DYNSET_TIMEOUT] != NULL) {
		if (!(set->flags & NFT_SET_TIMEOUT))
			return -EINVAL;
		timeout = msecs_to_jiffies(be64_to_cpu(nla_get_be64(
						tb[NFTA_DYNSET_TIMEOUT])));
	}

	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 (tb[NFTA_DYNSET_SREG_DATA] != NULL) {
		if (!(set->flags & NFT_SET_MAP))
			return -EINVAL;
		if (set->dtype == NFT_DATA_VERDICT)
			return -EOPNOTSUPP;

		priv->sreg_data = nft_parse_register(tb[NFTA_DYNSET_SREG_DATA]);
		err = nft_validate_register_load(priv->sreg_data, set->dlen);
		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;

		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;

		if (priv->expr->ops->type->flags & NFT_EXPR_GC) {
			if (set->flags & NFT_SET_TIMEOUT)
				goto err1;
			if (!set->ops->gc_init)
				goto err1;
			set->ops->gc_init(set);
		}
	}

	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);
	}

	priv->timeout = timeout;

	err = nf_tables_bind_set(ctx, set, &priv->binding);
	if (err < 0)
		goto err1;

	if (set->size == 0)
		set->size = 0xffff;

	priv->set = set;
	return 0;

err1:
	if (priv->expr != NULL)
		nft_expr_destroy(ctx, priv->expr);
	return err;
}

static void nft_dynset_deactivate(const struct nft_ctx *ctx,
				  const struct nft_expr *expr,
				  enum nft_trans_phase phase)
{
	struct nft_dynset *priv = nft_expr_priv(expr);

	nf_tables_deactivate_set(ctx, priv->set, &priv->binding, phase);
}

static void nft_dynset_activate(const struct nft_ctx *ctx,
				const struct nft_expr *expr)
{
	struct nft_dynset *priv = nft_expr_priv(expr);

	priv->set->use++;
}

static void nft_dynset_destroy(const struct nft_ctx *ctx,
			       const struct nft_expr *expr)
{
	struct nft_dynset *priv = nft_expr_priv(expr);

	if (priv->expr != NULL)
		nft_expr_destroy(ctx, priv->expr);

	nf_tables_destroy_set(ctx, priv->set);
}

static int nft_dynset_dump(struct sk_buff *skb, const struct nft_expr *expr)
{
	const struct nft_dynset *priv = nft_expr_priv(expr);
	u32 flags = priv->invert ? NFT_DYNSET_F_INV : 0;

	if (nft_dump_register(skb, NFTA_DYNSET_SREG_KEY, priv->sreg_key))
		goto nla_put_failure;
	if (priv->set->flags & NFT_SET_MAP &&
	    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(jiffies_to_msecs(priv->timeout)),
			 NFTA_DYNSET_PAD))
		goto nla_put_failure;
	if (priv->expr && nft_expr_dump(skb, NFTA_DYNSET_EXPR, priv->expr))
		goto nla_put_failure;
	if (nla_put_be32(skb, NFTA_DYNSET_FLAGS, htonl(flags)))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

static const struct nft_expr_ops nft_dynset_ops = {
	.type		= &nft_dynset_type,
	.size		= NFT_EXPR_SIZE(sizeof(struct nft_dynset)),
	.eval		= nft_dynset_eval,
	.init		= nft_dynset_init,
	.destroy	= nft_dynset_destroy,
	.activate	= nft_dynset_activate,
	.deactivate	= nft_dynset_deactivate,
	.dump		= nft_dynset_dump,
};

struct nft_expr_type nft_dynset_type __read_mostly = {
	.name		= "dynset",
	.ops		= &nft_dynset_ops,
	.policy		= nft_dynset_policy,
	.maxattr	= NFTA_DYNSET_MAX,
	.owner		= THIS_MODULE,
};
Commit	Line	Data
22fe54d5 PM	1	/*
	2	* Copyright (c) 2015 Patrick McHardy <kaber@trash.net>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*
	8	*/
	9
	10	#include <linux/kernel.h>
	11	#include <linux/module.h>
	12	#include <linux/init.h>
	13	#include <linux/netlink.h>
	14	#include <linux/netfilter.h>
	15	#include <linux/netfilter/nf_tables.h>
	16	#include <net/netfilter/nf_tables.h>
	17	#include <net/netfilter/nf_tables_core.h>
	18
	19	struct nft_dynset {
	20	struct nft_set *set;
	21	struct nft_set_ext_tmpl tmpl;
	22	enum nft_dynset_ops op:8;
	23	enum nft_registers sreg_key:8;
	24	enum nft_registers sreg_data:8;
dbd2be06	25	bool invert;
22fe54d5	26	u64 timeout;
3e135cd4	27	struct nft_expr *expr;
22fe54d5 PM	28	struct nft_set_binding binding;
	29	};
	30
f1f86d09 PG	31	static int nft_expr_clone(struct nft_expr dst, struct nft_expr src)
	32	{
	33	int err;
	34
	35	if (src->ops->clone) {
	36	dst->ops = src->ops;
	37	err = src->ops->clone(dst, src);
	38	if (err < 0)
	39	return err;
	40	} else {
	41	memcpy(dst, src, src->ops->size);
	42	}
	43
	44	__module_get(src->ops->type->owner);
	45	return 0;
	46	}
	47
22fe54d5	48	static void nft_dynset_new(struct nft_set set, const struct nft_expr *expr,
a55e22e9	49	struct nft_regs *regs)
22fe54d5 PM	50	{
22fe54d5 PM	51	const struct nft_dynset *priv = nft_expr_priv(expr);
3e135cd4	52	struct nft_set_ext *ext;
22fe54d5 PM	53	u64 timeout;
	54	void *elem;
	55
99a0efbe	56	if (!atomic_add_unless(&set->nelems, 1, set->size))
22fe54d5 PM	57	return NULL;
	58
	59	timeout = priv->timeout ? : set->timeout;
	60	elem = nft_set_elem_init(set, &priv->tmpl,
a55e22e9 PM	61	&regs->data[priv->sreg_key],
a55e22e9 PM	62	&regs->data[priv->sreg_data],
22fe54d5	63	timeout, GFP_ATOMIC);
61f9e292 LZ	64	if (elem == NULL)
61f9e292 LZ	65	goto err1;
3e135cd4 PM	66
3e135cd4 PM	67	ext = nft_set_elem_ext(set, elem);
086f3321 PNA	68	if (priv->expr != NULL &&
086f3321 PNA	69	nft_expr_clone(nft_set_ext_expr(ext), priv->expr) < 0)
61f9e292	70	goto err2;
3e135cd4	71
22fe54d5	72	return elem;
61f9e292 LZ	73
	74	err2:
	75	nft_set_elem_destroy(set, elem, false);
	76	err1:
	77	if (set->size)
	78	atomic_dec(&set->nelems);
	79	return NULL;
22fe54d5 PM	80	}
22fe54d5 PM	81
10870dd8 FW	82	void nft_dynset_eval(const struct nft_expr *expr,
10870dd8 FW	83	struct nft_regs regs, const struct nft_pktinfo pkt)
22fe54d5 PM	84	{
	85	const struct nft_dynset *priv = nft_expr_priv(expr);
	86	struct nft_set *set = priv->set;
	87	const struct nft_set_ext *ext;
3e135cd4	88	const struct nft_expr *sexpr;
22fe54d5 PM	89	u64 timeout;
22fe54d5 PM	90
a55e22e9 PM	91	if (set->ops->update(set, &regs->data[priv->sreg_key], nft_dynset_new,
a55e22e9 PM	92	expr, regs, &ext)) {
3e135cd4 PM	93	sexpr = NULL;
	94	if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR))
	95	sexpr = nft_set_ext_expr(ext);
	96
22fe54d5 PM	97	if (priv->op == NFT_DYNSET_OP_UPDATE &&
	98	nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
	99	timeout = priv->timeout ? : set->timeout;
b13468dc	100	*nft_set_ext_expiration(ext) = get_jiffies_64() + timeout;
277a2928	101	}
22fe54d5	102
3e135cd4 PM	103	if (sexpr != NULL)
3e135cd4 PM	104	sexpr->ops->eval(sexpr, regs, pkt);
dbd2be06 PNA	105
	106	if (priv->invert)
	107	regs->verdict.code = NFT_BREAK;
3e135cd4 PM	108	return;
3e135cd4 PM	109	}
277a2928	110
dbd2be06 PNA	111	if (!priv->invert)
dbd2be06 PNA	112	regs->verdict.code = NFT_BREAK;
22fe54d5 PM	113	}
	114
	115	static const struct nla_policy nft_dynset_policy[NFTA_DYNSET_MAX + 1] = {
b2fbd044 LZ	116	[NFTA_DYNSET_SET_NAME] = { .type = NLA_STRING,
b2fbd044 LZ	117	.len = NFT_SET_MAXNAMELEN - 1 },
22fe54d5 PM	118	[NFTA_DYNSET_SET_ID] = { .type = NLA_U32 },
	119	[NFTA_DYNSET_OP] = { .type = NLA_U32 },
	120	[NFTA_DYNSET_SREG_KEY] = { .type = NLA_U32 },
	121	[NFTA_DYNSET_SREG_DATA] = { .type = NLA_U32 },
	122	[NFTA_DYNSET_TIMEOUT] = { .type = NLA_U64 },
3e135cd4	123	[NFTA_DYNSET_EXPR] = { .type = NLA_NESTED },
dbd2be06	124	[NFTA_DYNSET_FLAGS] = { .type = NLA_U32 },
22fe54d5 PM	125	};
	126
	127	static int nft_dynset_init(const struct nft_ctx *ctx,
	128	const struct nft_expr *expr,
	129	const struct nlattr * const tb[])
	130	{
	131	struct nft_dynset *priv = nft_expr_priv(expr);
37a9cc52	132	u8 genmask = nft_genmask_next(ctx->net);
22fe54d5 PM	133	struct nft_set *set;
	134	u64 timeout;
	135	int err;
	136
f102d66b FW	137	lockdep_assert_held(&ctx->net->nft.commit_mutex);
f102d66b FW	138
22fe54d5 PM	139	if (tb[NFTA_DYNSET_SET_NAME] == NULL \|\|
	140	tb[NFTA_DYNSET_OP] == NULL \|\|
	141	tb[NFTA_DYNSET_SREG_KEY] == NULL)
	142	return -EINVAL;
	143
dbd2be06 PNA	144	if (tb[NFTA_DYNSET_FLAGS]) {
	145	u32 flags = ntohl(nla_get_be32(tb[NFTA_DYNSET_FLAGS]));
	146
	147	if (flags & ~NFT_DYNSET_F_INV)
	148	return -EINVAL;
	149	if (flags & NFT_DYNSET_F_INV)
	150	priv->invert = true;
	151	}
	152
10659cba PNA	153	set = nft_set_lookup_global(ctx->net, ctx->table,
	154	tb[NFTA_DYNSET_SET_NAME],
	155	tb[NFTA_DYNSET_SET_ID], genmask);
c7a72e3f PNA	156	if (IS_ERR(set))
c7a72e3f PNA	157	return PTR_ERR(set);
22fe54d5	158
bb6a6e8e LZ	159	if (set->ops->update == NULL)
	160	return -EOPNOTSUPP;
	161
22fe54d5 PM	162	if (set->flags & NFT_SET_CONSTANT)
	163	return -EBUSY;
	164
	165	priv->op = ntohl(nla_get_be32(tb[NFTA_DYNSET_OP]));
	166	switch (priv->op) {
	167	case NFT_DYNSET_OP_ADD:
	168	break;
	169	case NFT_DYNSET_OP_UPDATE:
	170	if (!(set->flags & NFT_SET_TIMEOUT))
	171	return -EOPNOTSUPP;
	172	break;
	173	default:
	174	return -EOPNOTSUPP;
	175	}
	176
	177	timeout = 0;
	178	if (tb[NFTA_DYNSET_TIMEOUT] != NULL) {
	179	if (!(set->flags & NFT_SET_TIMEOUT))
	180	return -EINVAL;
a8b1e36d AP	181	timeout = msecs_to_jiffies(be64_to_cpu(nla_get_be64(
a8b1e36d AP	182	tb[NFTA_DYNSET_TIMEOUT])));
22fe54d5 PM	183	}
22fe54d5 PM	184
b1c96ed3	185	priv->sreg_key = nft_parse_register(tb[NFTA_DYNSET_SREG_KEY]);
b0c3dc65	186	err = nft_validate_register_load(priv->sreg_key, set->klen);
22fe54d5 PM	187	if (err < 0)
	188	return err;
	189
	190	if (tb[NFTA_DYNSET_SREG_DATA] != NULL) {
	191	if (!(set->flags & NFT_SET_MAP))
	192	return -EINVAL;
	193	if (set->dtype == NFT_DATA_VERDICT)
	194	return -EOPNOTSUPP;
	195
b1c96ed3	196	priv->sreg_data = nft_parse_register(tb[NFTA_DYNSET_SREG_DATA]);
d07db988	197	err = nft_validate_register_load(priv->sreg_data, set->dlen);
22fe54d5 PM	198	if (err < 0)
	199	return err;
	200	} else if (set->flags & NFT_SET_MAP)
	201	return -EINVAL;
	202
3e135cd4 PM	203	if (tb[NFTA_DYNSET_EXPR] != NULL) {
	204	if (!(set->flags & NFT_SET_EVAL))
	205	return -EINVAL;
3e135cd4 PM	206
	207	priv->expr = nft_expr_init(ctx, tb[NFTA_DYNSET_EXPR]);
	208	if (IS_ERR(priv->expr))
	209	return PTR_ERR(priv->expr);
	210
	211	err = -EOPNOTSUPP;
	212	if (!(priv->expr->ops->type->flags & NFT_EXPR_STATEFUL))
	213	goto err1;
79b174ad PNA	214
	215	if (priv->expr->ops->type->flags & NFT_EXPR_GC) {
	216	if (set->flags & NFT_SET_TIMEOUT)
	217	goto err1;
	218	if (!set->ops->gc_init)
	219	goto err1;
	220	set->ops->gc_init(set);
	221	}
215a31f1	222	}
3e135cd4	223
22fe54d5 PM	224	nft_set_ext_prepare(&priv->tmpl);
	225	nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_KEY, set->klen);
	226	if (set->flags & NFT_SET_MAP)
	227	nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_DATA, set->dlen);
3e135cd4 PM	228	if (priv->expr != NULL)
	229	nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_EXPR,
	230	priv->expr->ops->size);
22fe54d5 PM	231	if (set->flags & NFT_SET_TIMEOUT) {
	232	if (timeout \|\| set->timeout)
	233	nft_set_ext_add(&priv->tmpl, NFT_SET_EXT_EXPIRATION);
	234	}
	235
	236	priv->timeout = timeout;
	237
	238	err = nf_tables_bind_set(ctx, set, &priv->binding);
	239	if (err < 0)
3e135cd4	240	goto err1;
22fe54d5	241
99a0efbe FW	242	if (set->size == 0)
	243	set->size = 0xffff;
	244
22fe54d5 PM	245	priv->set = set;
22fe54d5 PM	246	return 0;
3e135cd4 PM	247
	248	err1:
	249	if (priv->expr != NULL)
	250	nft_expr_destroy(ctx, priv->expr);
	251	return err;
22fe54d5 PM	252	}
22fe54d5 PM	253
cd5125d8	254	static void nft_dynset_deactivate(const struct nft_ctx *ctx,
f6ac8585 PNA	255	const struct nft_expr *expr,
f6ac8585 PNA	256	enum nft_trans_phase phase)
cd5125d8 FW	257	{
	258	struct nft_dynset *priv = nft_expr_priv(expr);
	259
273fe3f1 PNA	260	nf_tables_deactivate_set(ctx, priv->set, &priv->binding, phase);
	261	}
	262
	263	static void nft_dynset_activate(const struct nft_ctx *ctx,
	264	const struct nft_expr *expr)
	265	{
	266	struct nft_dynset *priv = nft_expr_priv(expr);
f6ac8585	267
273fe3f1	268	priv->set->use++;
cd5125d8 FW	269	}
cd5125d8 FW	270
22fe54d5 PM	271	static void nft_dynset_destroy(const struct nft_ctx *ctx,
	272	const struct nft_expr *expr)
	273	{
	274	struct nft_dynset *priv = nft_expr_priv(expr);
	275
3e135cd4 PM	276	if (priv->expr != NULL)
3e135cd4 PM	277	nft_expr_destroy(ctx, priv->expr);
cd5125d8 FW	278
cd5125d8 FW	279	nf_tables_destroy_set(ctx, priv->set);
22fe54d5 PM	280	}
	281
	282	static int nft_dynset_dump(struct sk_buff skb, const struct nft_expr expr)
	283	{
	284	const struct nft_dynset *priv = nft_expr_priv(expr);
dbd2be06	285	u32 flags = priv->invert ? NFT_DYNSET_F_INV : 0;
22fe54d5	286
b1c96ed3	287	if (nft_dump_register(skb, NFTA_DYNSET_SREG_KEY, priv->sreg_key))
22fe54d5 PM	288	goto nla_put_failure;
22fe54d5 PM	289	if (priv->set->flags & NFT_SET_MAP &&
b1c96ed3	290	nft_dump_register(skb, NFTA_DYNSET_SREG_DATA, priv->sreg_data))
22fe54d5 PM	291	goto nla_put_failure;
	292	if (nla_put_be32(skb, NFTA_DYNSET_OP, htonl(priv->op)))
	293	goto nla_put_failure;
	294	if (nla_put_string(skb, NFTA_DYNSET_SET_NAME, priv->set->name))
	295	goto nla_put_failure;
a8b1e36d AP	296	if (nla_put_be64(skb, NFTA_DYNSET_TIMEOUT,
a8b1e36d AP	297	cpu_to_be64(jiffies_to_msecs(priv->timeout)),
b46f6ded	298	NFTA_DYNSET_PAD))
22fe54d5	299	goto nla_put_failure;
3e135cd4 PM	300	if (priv->expr && nft_expr_dump(skb, NFTA_DYNSET_EXPR, priv->expr))
3e135cd4 PM	301	goto nla_put_failure;
dbd2be06 PNA	302	if (nla_put_be32(skb, NFTA_DYNSET_FLAGS, htonl(flags)))
dbd2be06 PNA	303	goto nla_put_failure;
22fe54d5 PM	304	return 0;
	305
	306	nla_put_failure:
	307	return -1;
	308	}
	309
22fe54d5 PM	310	static const struct nft_expr_ops nft_dynset_ops = {
	311	.type = &nft_dynset_type,
	312	.size = NFT_EXPR_SIZE(sizeof(struct nft_dynset)),
	313	.eval = nft_dynset_eval,
	314	.init = nft_dynset_init,
	315	.destroy = nft_dynset_destroy,
273fe3f1	316	.activate = nft_dynset_activate,
cd5125d8	317	.deactivate = nft_dynset_deactivate,
22fe54d5 PM	318	.dump = nft_dynset_dump,
	319	};
	320
4e24877e	321	struct nft_expr_type nft_dynset_type __read_mostly = {
22fe54d5 PM	322	.name = "dynset",
	323	.ops = &nft_dynset_ops,
	324	.policy = nft_dynset_policy,
	325	.maxattr = NFTA_DYNSET_MAX,
	326	.owner = THIS_MODULE,
	327	};