netfilter: nf_tables: remove skb and nlh from context structure

Instead of caching the original skbuff that contains the netlink
messages, this stores the netlink message sequence number, the
netlink portID and the report flag. This helps to prepare the
introduction of the object release via call_rcu.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 6 insertions, 4 deletions

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index b08f2a9..1ed2797 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -72,21 +72,23 @@ static inline void nft_data_debug(const struct nft_data *data)
  *	struct nft_ctx - nf_tables rule/set context
  *
  *	@net: net namespace
- * 	@skb: netlink skb
- * 	@nlh: netlink message header
  * 	@afi: address family info
  * 	@table: the table the chain is contained in
  * 	@chain: the chain the rule is contained in
  *	@nla: netlink attributes
+ *	@portid: netlink portID of the original message
+ *	@seq: netlink sequence number
+ *	@report: notify via unicast netlink message
  */
 struct nft_ctx {
 	struct net			*net;
-	const struct sk_buff		*skb;
-	const struct nlmsghdr		*nlh;
 	struct nft_af_info		*afi;
 	struct nft_table		*table;
 	struct nft_chain		*chain;
 	const struct nlattr * const 	*nla;
+	u32				portid;
+	u32				seq;
+	bool				report;
 };
 
 struct nft_data_desc {