netfilter: nfnetlink_queue: get rid of nfnetlink_queue_ct.c

The original intention was to avoid dependencies between nfnetlink_queue and
conntrack without ifdef pollution. However, we can achieve this by moving the
conntrack dependent code into ctnetlink and keep some glue code to access the
nfq_ct indirection from nfqueue.

After this patch, the nfq_ct indirection is always compiled in the netfilter
core to avoid polluting nfqueue with ifdefs. Thus, if nf_conntrack is not
compiled this results in only 8-bytes of memory waste in x86_64.

This patch also adds ctnetlink_nfqueue_seqadj() to avoid that the nf_conn
structure layout if exposed to nf_queue, which creates another dependency with
nf_conntrack at compilation time.

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

1 files changed, 0 insertions, 51 deletions

diff --git a/include/net/netfilter/nfnetlink_queue.h b/include/net/netfilter/nfnetlink_queue.h
deleted file mode 100644
index aff88ba91391..000000000000
--- a/include/net/netfilter/nfnetlink_queue.h
+++ /dev/null
@@ -1,51 +0,0 @@
-#ifndef _NET_NFNL_QUEUE_H_
-#define _NET_NFNL_QUEUE_H_
-
-#include <linux/netfilter/nf_conntrack_common.h>
-
-struct nf_conn;
-
-#ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT
-struct nf_conn *nfqnl_ct_get(struct sk_buff *entskb, size_t *size,
-			     enum ip_conntrack_info *ctinfo);
-struct nf_conn *nfqnl_ct_parse(const struct sk_buff *skb,
-			       const struct nlattr *attr,
-			       enum ip_conntrack_info *ctinfo);
-int nfqnl_ct_put(struct sk_buff *skb, struct nf_conn *ct,
-		 enum ip_conntrack_info ctinfo);
-void nfqnl_ct_seq_adjust(struct sk_buff *skb, struct nf_conn *ct,
-			 enum ip_conntrack_info ctinfo, int diff);
-int nfqnl_attach_expect(struct nf_conn *ct, const struct nlattr *attr,
-			u32 portid, u32 report);
-#else
-inline struct nf_conn *
-nfqnl_ct_get(struct sk_buff *entskb, size_t *size, enum ip_conntrack_info *ctinfo)
-{
-	return NULL;
-}
-
-inline struct nf_conn *nfqnl_ct_parse(const struct sk_buff *skb,
-				      const struct nlattr *attr,
-				      enum ip_conntrack_info *ctinfo)
-{
-	return NULL;
-}
-
-inline int
-nfqnl_ct_put(struct sk_buff *skb, struct nf_conn *ct, enum ip_conntrack_info ctinfo)
-{
-	return 0;
-}
-
-inline void nfqnl_ct_seq_adjust(struct sk_buff *skb, struct nf_conn *ct,
-				enum ip_conntrack_info ctinfo, int diff)
-{
-}
-
-inline int nfqnl_attach_expect(struct nf_conn *ct, const struct nlattr *attr,
-			       u32 portid, u32 report)
-{
-	return 0;
-}
-#endif /* NF_CONNTRACK */
-#endif