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Commit 0e9091d6 authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso
Browse files

netfilter: nf_tables: introduce nft_setelem_parse_flags() helper 



This function parses the set element flags, thus, we can reuse the same
handling when deleting elements.

Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent 141658fb

net/netfilter/nf_tables_api.c

+22 −12
Original line number Diff line number Diff line
@@ -3375,6 +3375,22 @@ void nft_set_elem_destroy(const struct nft_set *set, void *elem) 
}

EXPORT_SYMBOL_GPL(nft_set_elem_destroy);



static int nft_setelem_parse_flags(const struct nft_set *set,

				   const struct nlattr *attr, u32 *flags)

{

	if (attr == NULL)

		return 0;



	*flags = ntohl(nla_get_be32(attr));

	if (*flags & ~NFT_SET_ELEM_INTERVAL_END)

		return -EINVAL;

	if (!(set->flags & NFT_SET_INTERVAL) &&

	    *flags & NFT_SET_ELEM_INTERVAL_END)

		return -EINVAL;



	return 0;

}



static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,

			    const struct nlattr *attr)

{
@@ -3388,8 +3404,8 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, 
	struct nft_data data;

	enum nft_registers dreg;

	struct nft_trans *trans;

	u32 flags = 0;

	u64 timeout;

	u32 flags;

	u8 ulen;

	int err;
@@ -3403,17 +3419,11 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, 


	nft_set_ext_prepare(&tmpl);



	flags = 0;

	if (nla[NFTA_SET_ELEM_FLAGS] != NULL) {

		flags = ntohl(nla_get_be32(nla[NFTA_SET_ELEM_FLAGS]));

		if (flags & ~NFT_SET_ELEM_INTERVAL_END)

			return -EINVAL;

		if (!(set->flags & NFT_SET_INTERVAL) &&

		    flags & NFT_SET_ELEM_INTERVAL_END)

			return -EINVAL;

	err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);

	if (err < 0)

		return err;

	if (flags != 0)

		nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);

	}



	if (set->flags & NFT_SET_MAP) {

		if (nla[NFTA_SET_ELEM_DATA] == NULL &&