C++ (Cpp) nft_set_lookup_global示例

示例#1

文件： nft_objref.c 项目： the-snowwhite/linux-socfpga

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

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

	if (!(set->flags & NFT_SET_OBJECT))
		return -EINVAL;

	priv->sreg = nft_parse_register(tb[NFTA_OBJREF_SET_SREG]);
	err = nft_validate_register_load(priv->sreg, set->klen);
	if (err < 0)
		return err;

	priv->binding.flags = set->flags & NFT_SET_OBJECT;

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

	priv->set = set;
	return 0;
}

示例#2

文件： nft_lookup.c 项目： Anjali05/linux

static int nft_lookup_init(const struct nft_ctx *ctx,
			   const struct nft_expr *expr,
			   const struct nlattr * const tb[])
{
	struct nft_lookup *priv = nft_expr_priv(expr);
	u8 genmask = nft_genmask_next(ctx->net);
	struct nft_set *set;
	u32 flags;
	int err;

	if (tb[NFTA_LOOKUP_SET] == NULL ||
	    tb[NFTA_LOOKUP_SREG] == NULL)
		return -EINVAL;

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

	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 (tb[NFTA_LOOKUP_FLAGS]) {
		flags = ntohl(nla_get_be32(tb[NFTA_LOOKUP_FLAGS]));

		if (flags & ~NFT_LOOKUP_F_INV)
			return -EINVAL;

		if (flags & NFT_LOOKUP_F_INV) {
			if (set->flags & NFT_SET_MAP)
				return -EINVAL;
			priv->invert = true;
		}
	}

	if (tb[NFTA_LOOKUP_DREG] != NULL) {
		if (priv->invert)
			return -EINVAL;
		if (!(set->flags & NFT_SET_MAP))
			return -EINVAL;

		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;
	} else if (set->flags & NFT_SET_MAP)
		return -EINVAL;

	priv->binding.flags = set->flags & NFT_SET_MAP;

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

	priv->set = set;
	return 0;
}