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netfilter: nf_tables: Introduce stateful object update operation

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This patch adds the infrastructure needed for the stateful object update
support.

Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Fernando Fernandez Mancera
2019-08-26 13:40:52 +02:00
committed by Pablo Neira Ayuso
parent 44b63b0a71
commit d62d0ba97b
2 changed files with 80 additions and 7 deletions
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9
include/net/netfilter/nf_tables.h
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@@ -1127,6 +1127,7 @@ struct nft_object_type {
* @init: initialize object from netlink attributes
* @destroy: release existing stateful object
* @dump: netlink dump stateful object
* @update: update stateful object
*/
struct nft_object_ops {
void (*eval)(struct nft_object *obj,
@@ -1141,6 +1142,8 @@ struct nft_object_ops {
int (*dump)(struct sk_buff *skb,
struct nft_object *obj,
bool reset);
void (*update)(struct nft_object *obj,
struct nft_object *newobj);
const struct nft_object_type *type;
};
@@ -1429,10 +1432,16 @@ struct nft_trans_elem {
struct nft_trans_obj {
struct nft_object *obj;
struct nft_object *newobj;
bool update;
};
#define nft_trans_obj(trans) \
(((struct nft_trans_obj *)trans->data)->obj)
#define nft_trans_obj_newobj(trans) \
(((struct nft_trans_obj *)trans->data)->newobj)
#define nft_trans_obj_update(trans) \
(((struct nft_trans_obj *)trans->data)->update)
struct nft_trans_flowtable {
struct nft_flowtable *flowtable;