@@ -583,6 +583,7 @@ static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb,
* @policy: netlink attribute policy
* @maxattr: highest netlink attribute number
* @family: address family for AF-specific types
+ * @flags: expression type flags
*/
struct nft_expr_type {
const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *,
@@ -594,8 +595,11 @@ struct nft_expr_type {
const struct nla_policy *policy;
unsigned int maxattr;
u8 family;
+ u8 flags;
};
+#define NFT_EXPR_STATEFUL 0x1
+
/**
* struct nft_expr_ops - nf_tables expression operations
*
@@ -92,6 +92,7 @@ static struct nft_expr_type nft_counter_type __read_mostly = {
.ops = &nft_counter_ops,
.policy = nft_counter_policy,
.maxattr = NFTA_COUNTER_MAX,
+ .flags = NFT_EXPR_STATEFUL,
.owner = THIS_MODULE,
};
@@ -98,6 +98,7 @@ static struct nft_expr_type nft_limit_type __read_mostly = {
.ops = &nft_limit_ops,
.policy = nft_limit_policy,
.maxattr = NFTA_LIMIT_MAX,
+ .flags = NFT_EXPR_STATEFUL,
.owner = THIS_MODULE,
};