C++ (Cpp) target_compat_from_user примеры использования

Пример #1

Файл: nft_compat.c Проект: avagin/linux

static int
nft_target_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
		const struct nlattr * const tb[])
{
	void *info = nft_expr_priv(expr);
	struct xt_target *target = expr->ops->data;
	struct xt_tgchk_param par;
	size_t size = XT_ALIGN(nla_len(tb[NFTA_TARGET_INFO]));
	u16 proto = 0;
	bool inv = false;
	union nft_entry e = {};
	int ret;

	target_compat_from_user(target, nla_data(tb[NFTA_TARGET_INFO]), info);

	if (ctx->nla[NFTA_RULE_COMPAT]) {
		ret = nft_parse_compat(ctx->nla[NFTA_RULE_COMPAT], &proto, &inv);
		if (ret < 0)
			return ret;
	}

	nft_target_set_tgchk_param(&par, ctx, target, info, &e, proto, inv);

	ret = xt_check_target(&par, size, proto, inv);
	if (ret < 0)
		return ret;

	/* The standard target cannot be used */
	if (!target->target)
		return -EINVAL;

	return 0;
}

Пример #2

Файл: nft_compat.c Проект: 383530895/linux

static int
nft_target_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
		const struct nlattr * const tb[])
{
	void *info = nft_expr_priv(expr);
	struct xt_target *target = expr->ops->data;
	struct xt_tgchk_param par;
	size_t size = XT_ALIGN(nla_len(tb[NFTA_TARGET_INFO]));
	u8 proto = 0;
	bool inv = false;
	union nft_entry e = {};
	int ret;

	ret = nft_compat_chain_validate_dependency(target->table, ctx->chain);
	if (ret < 0)
		goto err;

	target_compat_from_user(target, nla_data(tb[NFTA_TARGET_INFO]), info);

	if (ctx->nla[NFTA_RULE_COMPAT]) {
		ret = nft_parse_compat(ctx->nla[NFTA_RULE_COMPAT], &proto, &inv);
		if (ret < 0)
			goto err;
	}

	nft_target_set_tgchk_param(&par, ctx, target, info, &e, proto, inv);

	ret = xt_check_target(&par, size, proto, inv);
	if (ret < 0)
		goto err;

	/* The standard target cannot be used */
	if (target->target == NULL) {
		ret = -EINVAL;
		goto err;
	}

	return 0;
err:
	module_put(target->me);
	return ret;
}