[linux-2.6-block.git] / net / netfilter / nft_dynset.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2015 Patrick McHardy <kaber@trash.net>
 */

#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, 0, 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 (priv->op == NFT_DYNSET_OP_DELETE) {
		set->ops->delete(set, &regs->data[priv->sreg_key]);
		return;
	}

	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:
	case NFT_DYNSET_OP_DELETE:
		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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
22fe54d5 PM	2	/*
22fe54d5 PM	3	* Copyright (c) 2015 Patrick McHardy <kaber@trash.net>
22fe54d5 PM	4	*/
	5
	6	#include <linux/kernel.h>
	7	#include <linux/module.h>
	8	#include <linux/init.h>
	9	#include <linux/netlink.h>
	10	#include <linux/netfilter.h>
	11	#include <linux/netfilter/nf_tables.h>
	12	#include <net/netfilter/nf_tables.h>
	13	#include <net/netfilter/nf_tables_core.h>
	14
	15	struct nft_dynset {
	16	struct nft_set *set;
	17	struct nft_set_ext_tmpl tmpl;
	18	enum nft_dynset_ops op:8;
	19	enum nft_registers sreg_key:8;
	20	enum nft_registers sreg_data:8;
dbd2be06	21	bool invert;
22fe54d5	22	u64 timeout;
3e135cd4	23	struct nft_expr *expr;
22fe54d5 PM	24	struct nft_set_binding binding;
	25	};
	26
f1f86d09 PG	27	static int nft_expr_clone(struct nft_expr dst, struct nft_expr src)
	28	{
	29	int err;
	30
	31	if (src->ops->clone) {
	32	dst->ops = src->ops;
	33	err = src->ops->clone(dst, src);
	34	if (err < 0)
	35	return err;
	36	} else {
	37	memcpy(dst, src, src->ops->size);
	38	}
	39
	40	__module_get(src->ops->type->owner);
	41	return 0;
	42	}
	43
22fe54d5	44	static void nft_dynset_new(struct nft_set set, const struct nft_expr *expr,
a55e22e9	45	struct nft_regs *regs)
22fe54d5 PM	46	{
22fe54d5 PM	47	const struct nft_dynset *priv = nft_expr_priv(expr);
3e135cd4	48	struct nft_set_ext *ext;
22fe54d5 PM	49	u64 timeout;
	50	void *elem;
	51
99a0efbe	52	if (!atomic_add_unless(&set->nelems, 1, set->size))
22fe54d5 PM	53	return NULL;
	54
	55	timeout = priv->timeout ? : set->timeout;
	56	elem = nft_set_elem_init(set, &priv->tmpl,
a55e22e9 PM	57	&regs->data[priv->sreg_key],
a55e22e9 PM	58	&regs->data[priv->sreg_data],
79ebb5bb	59	timeout, 0, GFP_ATOMIC);
61f9e292 LZ	60	if (elem == NULL)
61f9e292 LZ	61	goto err1;
3e135cd4 PM	62
3e135cd4 PM	63	ext = nft_set_elem_ext(set, elem);
086f3321 PNA	64	if (priv->expr != NULL &&
086f3321 PNA	65	nft_expr_clone(nft_set_ext_expr(ext), priv->expr) < 0)
61f9e292	66	goto err2;
3e135cd4	67
22fe54d5	68	return elem;
61f9e292 LZ	69
	70	err2:
	71	nft_set_elem_destroy(set, elem, false);
	72	err1:
	73	if (set->size)
	74	atomic_dec(&set->nelems);
	75	return NULL;
22fe54d5 PM	76	}
22fe54d5 PM	77
10870dd8 FW	78	void nft_dynset_eval(const struct nft_expr *expr,
10870dd8 FW	79	struct nft_regs regs, const struct nft_pktinfo pkt)
22fe54d5 PM	80	{
	81	const struct nft_dynset *priv = nft_expr_priv(expr);
	82	struct nft_set *set = priv->set;
	83	const struct nft_set_ext *ext;
3e135cd4	84	const struct nft_expr *sexpr;
22fe54d5 PM	85	u64 timeout;
22fe54d5 PM	86
d0a8d877 AJ	87	if (priv->op == NFT_DYNSET_OP_DELETE) {
	88	set->ops->delete(set, &regs->data[priv->sreg_key]);
	89	return;
	90	}
	91
a55e22e9 PM	92	if (set->ops->update(set, &regs->data[priv->sreg_key], nft_dynset_new,
a55e22e9 PM	93	expr, regs, &ext)) {
3e135cd4 PM	94	sexpr = NULL;
	95	if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR))
	96	sexpr = nft_set_ext_expr(ext);
	97
22fe54d5 PM	98	if (priv->op == NFT_DYNSET_OP_UPDATE &&
	99	nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
	100	timeout = priv->timeout ? : set->timeout;
b13468dc	101	*nft_set_ext_expiration(ext) = get_jiffies_64() + timeout;
277a2928	102	}
22fe54d5	103
3e135cd4 PM	104	if (sexpr != NULL)
3e135cd4 PM	105	sexpr->ops->eval(sexpr, regs, pkt);
dbd2be06 PNA	106
	107	if (priv->invert)
	108	regs->verdict.code = NFT_BREAK;
3e135cd4 PM	109	return;
3e135cd4 PM	110	}
277a2928	111
dbd2be06 PNA	112	if (!priv->invert)
dbd2be06 PNA	113	regs->verdict.code = NFT_BREAK;
22fe54d5 PM	114	}
	115
	116	static const struct nla_policy nft_dynset_policy[NFTA_DYNSET_MAX + 1] = {
b2fbd044 LZ	117	[NFTA_DYNSET_SET_NAME] = { .type = NLA_STRING,
b2fbd044 LZ	118	.len = NFT_SET_MAXNAMELEN - 1 },
22fe54d5 PM	119	[NFTA_DYNSET_SET_ID] = { .type = NLA_U32 },
	120	[NFTA_DYNSET_OP] = { .type = NLA_U32 },
	121	[NFTA_DYNSET_SREG_KEY] = { .type = NLA_U32 },
	122	[NFTA_DYNSET_SREG_DATA] = { .type = NLA_U32 },
	123	[NFTA_DYNSET_TIMEOUT] = { .type = NLA_U64 },
3e135cd4	124	[NFTA_DYNSET_EXPR] = { .type = NLA_NESTED },
dbd2be06	125	[NFTA_DYNSET_FLAGS] = { .type = NLA_U32 },
22fe54d5 PM	126	};
	127
	128	static int nft_dynset_init(const struct nft_ctx *ctx,
	129	const struct nft_expr *expr,
	130	const struct nlattr * const tb[])
	131	{
	132	struct nft_dynset *priv = nft_expr_priv(expr);
37a9cc52	133	u8 genmask = nft_genmask_next(ctx->net);
22fe54d5 PM	134	struct nft_set *set;
	135	u64 timeout;
	136	int err;
	137
f102d66b FW	138	lockdep_assert_held(&ctx->net->nft.commit_mutex);
f102d66b FW	139
22fe54d5 PM	140	if (tb[NFTA_DYNSET_SET_NAME] == NULL \|\|
	141	tb[NFTA_DYNSET_OP] == NULL \|\|
	142	tb[NFTA_DYNSET_SREG_KEY] == NULL)
	143	return -EINVAL;
	144
dbd2be06 PNA	145	if (tb[NFTA_DYNSET_FLAGS]) {
	146	u32 flags = ntohl(nla_get_be32(tb[NFTA_DYNSET_FLAGS]));
	147
	148	if (flags & ~NFT_DYNSET_F_INV)
	149	return -EINVAL;
	150	if (flags & NFT_DYNSET_F_INV)
	151	priv->invert = true;
	152	}
	153
10659cba PNA	154	set = nft_set_lookup_global(ctx->net, ctx->table,
	155	tb[NFTA_DYNSET_SET_NAME],
	156	tb[NFTA_DYNSET_SET_ID], genmask);
c7a72e3f PNA	157	if (IS_ERR(set))
c7a72e3f PNA	158	return PTR_ERR(set);
22fe54d5	159
bb6a6e8e LZ	160	if (set->ops->update == NULL)
	161	return -EOPNOTSUPP;
	162
22fe54d5 PM	163	if (set->flags & NFT_SET_CONSTANT)
	164	return -EBUSY;
	165
	166	priv->op = ntohl(nla_get_be32(tb[NFTA_DYNSET_OP]));
	167	switch (priv->op) {
	168	case NFT_DYNSET_OP_ADD:
d0a8d877	169	case NFT_DYNSET_OP_DELETE:
22fe54d5 PM	170	break;
	171	case NFT_DYNSET_OP_UPDATE:
	172	if (!(set->flags & NFT_SET_TIMEOUT))
	173	return -EOPNOTSUPP;
	174	break;
	175	default:
	176	return -EOPNOTSUPP;
	177	}
	178
	179	timeout = 0;
	180	if (tb[NFTA_DYNSET_TIMEOUT] != NULL) {
	181	if (!(set->flags & NFT_SET_TIMEOUT))
	182	return -EINVAL;
a8b1e36d AP	183	timeout = msecs_to_jiffies(be64_to_cpu(nla_get_be64(
a8b1e36d AP	184	tb[NFTA_DYNSET_TIMEOUT])));
22fe54d5 PM	185	}
22fe54d5 PM	186
b1c96ed3	187	priv->sreg_key = nft_parse_register(tb[NFTA_DYNSET_SREG_KEY]);
b0c3dc65	188	err = nft_validate_register_load(priv->sreg_key, set->klen);
22fe54d5 PM	189	if (err < 0)
	190	return err;
	191
	192	if (tb[NFTA_DYNSET_SREG_DATA] != NULL) {
	193	if (!(set->flags & NFT_SET_MAP))
	194	return -EINVAL;
	195	if (set->dtype == NFT_DATA_VERDICT)
	196	return -EOPNOTSUPP;
	197
b1c96ed3	198	priv->sreg_data = nft_parse_register(tb[NFTA_DYNSET_SREG_DATA]);
d07db988	199	err = nft_validate_register_load(priv->sreg_data, set->dlen);
22fe54d5 PM	200	if (err < 0)
	201	return err;
	202	} else if (set->flags & NFT_SET_MAP)
	203	return -EINVAL;
	204
3e135cd4 PM	205	if (tb[NFTA_DYNSET_EXPR] != NULL) {
	206	if (!(set->flags & NFT_SET_EVAL))
	207	return -EINVAL;
3e135cd4 PM	208
	209	priv->expr = nft_expr_init(ctx, tb[NFTA_DYNSET_EXPR]);
	210	if (IS_ERR(priv->expr))
	211	return PTR_ERR(priv->expr);
	212
	213	err = -EOPNOTSUPP;
	214	if (!(priv->expr->ops->type->flags & NFT_EXPR_STATEFUL))
	215	goto err1;
79b174ad PNA	216
	217	if (priv->expr->ops->type->flags & NFT_EXPR_GC) {
	218	if (set->flags & NFT_SET_TIMEOUT)
	219	goto err1;
	220	if (!set->ops->gc_init)
	221	goto err1;
	222	set->ops->gc_init(set);
	223	}
215a31f1	224	}
3e135cd4	225
22fe54d5 PM	226	nft_set_ext_prepare(&priv->tmpl);
	227	nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_KEY, set->klen);
	228	if (set->flags & NFT_SET_MAP)
	229	nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_DATA, set->dlen);
3e135cd4 PM	230	if (priv->expr != NULL)
	231	nft_set_ext_add_length(&priv->tmpl, NFT_SET_EXT_EXPR,
	232	priv->expr->ops->size);
22fe54d5 PM	233	if (set->flags & NFT_SET_TIMEOUT) {
	234	if (timeout \|\| set->timeout)
	235	nft_set_ext_add(&priv->tmpl, NFT_SET_EXT_EXPIRATION);
	236	}
	237
	238	priv->timeout = timeout;
	239
	240	err = nf_tables_bind_set(ctx, set, &priv->binding);
	241	if (err < 0)
3e135cd4	242	goto err1;
22fe54d5	243
99a0efbe FW	244	if (set->size == 0)
	245	set->size = 0xffff;
	246
22fe54d5 PM	247	priv->set = set;
22fe54d5 PM	248	return 0;
3e135cd4 PM	249
	250	err1:
	251	if (priv->expr != NULL)
	252	nft_expr_destroy(ctx, priv->expr);
	253	return err;
22fe54d5 PM	254	}
22fe54d5 PM	255
cd5125d8	256	static void nft_dynset_deactivate(const struct nft_ctx *ctx,
f6ac8585 PNA	257	const struct nft_expr *expr,
f6ac8585 PNA	258	enum nft_trans_phase phase)
cd5125d8 FW	259	{
	260	struct nft_dynset *priv = nft_expr_priv(expr);
	261
273fe3f1 PNA	262	nf_tables_deactivate_set(ctx, priv->set, &priv->binding, phase);
	263	}
	264
	265	static void nft_dynset_activate(const struct nft_ctx *ctx,
	266	const struct nft_expr *expr)
	267	{
	268	struct nft_dynset *priv = nft_expr_priv(expr);
f6ac8585	269
273fe3f1	270	priv->set->use++;
cd5125d8 FW	271	}
cd5125d8 FW	272
22fe54d5 PM	273	static void nft_dynset_destroy(const struct nft_ctx *ctx,
	274	const struct nft_expr *expr)
	275	{
	276	struct nft_dynset *priv = nft_expr_priv(expr);
	277
3e135cd4 PM	278	if (priv->expr != NULL)
3e135cd4 PM	279	nft_expr_destroy(ctx, priv->expr);
cd5125d8 FW	280
cd5125d8 FW	281	nf_tables_destroy_set(ctx, priv->set);
22fe54d5 PM	282	}
	283
	284	static int nft_dynset_dump(struct sk_buff skb, const struct nft_expr expr)
	285	{
	286	const struct nft_dynset *priv = nft_expr_priv(expr);
dbd2be06	287	u32 flags = priv->invert ? NFT_DYNSET_F_INV : 0;
22fe54d5	288
b1c96ed3	289	if (nft_dump_register(skb, NFTA_DYNSET_SREG_KEY, priv->sreg_key))
22fe54d5 PM	290	goto nla_put_failure;
22fe54d5 PM	291	if (priv->set->flags & NFT_SET_MAP &&
b1c96ed3	292	nft_dump_register(skb, NFTA_DYNSET_SREG_DATA, priv->sreg_data))
22fe54d5 PM	293	goto nla_put_failure;
	294	if (nla_put_be32(skb, NFTA_DYNSET_OP, htonl(priv->op)))
	295	goto nla_put_failure;
	296	if (nla_put_string(skb, NFTA_DYNSET_SET_NAME, priv->set->name))
	297	goto nla_put_failure;
a8b1e36d AP	298	if (nla_put_be64(skb, NFTA_DYNSET_TIMEOUT,
a8b1e36d AP	299	cpu_to_be64(jiffies_to_msecs(priv->timeout)),
b46f6ded	300	NFTA_DYNSET_PAD))
22fe54d5	301	goto nla_put_failure;
3e135cd4 PM	302	if (priv->expr && nft_expr_dump(skb, NFTA_DYNSET_EXPR, priv->expr))
3e135cd4 PM	303	goto nla_put_failure;
dbd2be06 PNA	304	if (nla_put_be32(skb, NFTA_DYNSET_FLAGS, htonl(flags)))
dbd2be06 PNA	305	goto nla_put_failure;
22fe54d5 PM	306	return 0;
	307
	308	nla_put_failure:
	309	return -1;
	310	}
	311
22fe54d5 PM	312	static const struct nft_expr_ops nft_dynset_ops = {
	313	.type = &nft_dynset_type,
	314	.size = NFT_EXPR_SIZE(sizeof(struct nft_dynset)),
	315	.eval = nft_dynset_eval,
	316	.init = nft_dynset_init,
	317	.destroy = nft_dynset_destroy,
273fe3f1	318	.activate = nft_dynset_activate,
cd5125d8	319	.deactivate = nft_dynset_deactivate,
22fe54d5 PM	320	.dump = nft_dynset_dump,
	321	};
	322
4e24877e	323	struct nft_expr_type nft_dynset_type __read_mostly = {
22fe54d5 PM	324	.name = "dynset",
	325	.ops = &nft_dynset_ops,
	326	.policy = nft_dynset_policy,
	327	.maxattr = NFTA_DYNSET_MAX,
	328	.owner = THIS_MODULE,
	329	};