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netfilter: nf_tables: atomic dump and reset for stateful objects

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This patch adds a new NFT_MSG_GETOBJ_RESET command perform an atomic
dump-and-reset of the stateful object. This also comes with add support
for atomic dump and reset for counter and quota objects.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso
2016-11-28 00:05:44 +01:00
parent 795595f68d
commit 43da04a593
5 changed files with 85 additions and 23 deletions
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3
include/net/netfilter/nf_tables.h
View File

@@ -997,7 +997,8 @@ struct nft_object_type {
struct nft_object *obj);
void (*destroy)(struct nft_object *obj);
int (*dump)(struct sk_buff *skb,
const struct nft_object *obj);
struct nft_object *obj,
bool reset);
};
int nft_register_obj(struct nft_object_type *obj_type);

2
include/uapi/linux/netfilter/nf_tables.h
View File

@@ -89,6 +89,7 @@ enum nft_verdicts {
* @NFT_MSG_NEWOBJ: create a stateful object (enum nft_obj_attributes)
* @NFT_MSG_GETOBJ: get a stateful object (enum nft_obj_attributes)
* @NFT_MSG_DELOBJ: delete a stateful object (enum nft_obj_attributes)
* @NFT_MSG_GETOBJ_RESET: get and reset a stateful object (enum nft_obj_attributes)
*/
enum nf_tables_msg_types {
NFT_MSG_NEWTABLE,
@@ -112,6 +113,7 @@ enum nf_tables_msg_types {
NFT_MSG_NEWOBJ,
NFT_MSG_GETOBJ,
NFT_MSG_DELOBJ,
NFT_MSG_GETOBJ_RESET,
NFT_MSG_MAX,
};