netfilter: Pass priv instead of nf_hook_ops to netfilter hooks

Only pass the void *priv parameter out of the nf_hook_ops.  That is
all any of the functions are interested now, and by limiting what is
passed it becomes simpler to change implementation details.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/bridge/br_netfilter_hooks.c

@@ -464,7 +464,7 @@ struct net_device *setup_pre_routing(struct sk_buff *skb)
  * receiving device) to make netfilter happy, the REDIRECT
  * target in particular.  Save the original destination IP
  * address to be able to detect DNAT afterwards. */
-static unsigned int br_nf_pre_routing(const struct nf_hook_ops *ops,
+static unsigned int br_nf_pre_routing(void *priv,
 				      struct sk_buff *skb,
 				      const struct nf_hook_state *state)
 {
@@ -486,7 +486,7 @@ static unsigned int br_nf_pre_routing(const struct nf_hook_ops *ops,
 			return NF_ACCEPT;
 
 		nf_bridge_pull_encap_header_rcsum(skb);
-		return br_nf_pre_routing_ipv6(ops, skb, state);
+		return br_nf_pre_routing_ipv6(priv, skb, state);
 	}
 
 	if (!brnf_call_iptables && !br->nf_call_iptables)
@@ -526,7 +526,7 @@ static unsigned int br_nf_pre_routing(const struct nf_hook_ops *ops,
  * took place when the packet entered the bridge), but we
  * register an IPv4 PRE_ROUTING 'sabotage' hook that will
  * prevent this from happening. */
-static unsigned int br_nf_local_in(const struct nf_hook_ops *ops,
+static unsigned int br_nf_local_in(void *priv,
 				   struct sk_buff *skb,
 				   const struct nf_hook_state *state)
 {
@@ -570,7 +570,7 @@ static int br_nf_forward_finish(struct net *net, struct sock *sk, struct sk_buff
  * but we are still able to filter on the 'real' indev/outdev
  * because of the physdev module. For ARP, indev and outdev are the
  * bridge ports. */
-static unsigned int br_nf_forward_ip(const struct nf_hook_ops *ops,
+static unsigned int br_nf_forward_ip(void *priv,
 				     struct sk_buff *skb,
 				     const struct nf_hook_state *state)
 {
@@ -633,7 +633,7 @@ static unsigned int br_nf_forward_ip(const struct nf_hook_ops *ops,
 	return NF_STOLEN;
 }
 
-static unsigned int br_nf_forward_arp(const struct nf_hook_ops *ops,
+static unsigned int br_nf_forward_arp(void *priv,
 				      struct sk_buff *skb,
 				      const struct nf_hook_state *state)
 {
@@ -801,7 +801,7 @@ static int br_nf_dev_queue_xmit(struct net *net, struct sock *sk, struct sk_buff
 }
 
 /* PF_BRIDGE/POST_ROUTING ********************************************/
-static unsigned int br_nf_post_routing(const struct nf_hook_ops *ops,
+static unsigned int br_nf_post_routing(void *priv,
 				       struct sk_buff *skb,
 				       const struct nf_hook_state *state)
 {
@@ -850,7 +850,7 @@ static unsigned int br_nf_post_routing(const struct nf_hook_ops *ops,
 /* IP/SABOTAGE *****************************************************/
 /* Don't hand locally destined packets to PF_INET(6)/PRE_ROUTING
  * for the second time. */
-static unsigned int ip_sabotage_in(const struct nf_hook_ops *ops,
+static unsigned int ip_sabotage_in(void *priv,
 				   struct sk_buff *skb,
 				   const struct nf_hook_state *state)
 {

net/bridge/br_netfilter_ipv6.c

@@ -218,7 +218,7 @@ static int br_nf_pre_routing_finish_ipv6(struct net *net, struct sock *sk, struc
 /* Replicate the checks that IPv6 does on packet reception and pass the packet
  * to ip6tables.
  */
-unsigned int br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops,
+unsigned int br_nf_pre_routing_ipv6(void *priv,
 				    struct sk_buff *skb,
 				    const struct nf_hook_state *state)
 {

net/bridge/netfilter/ebtable_filter.c

@@ -57,14 +57,14 @@ static const struct ebt_table frame_filter = {
 };
 
 static unsigned int
-ebt_in_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
+ebt_in_hook(void *priv, struct sk_buff *skb,
 	    const struct nf_hook_state *state)
 {
 	return ebt_do_table(skb, state, state->net->xt.frame_filter);
 }
 
 static unsigned int
-ebt_out_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
+ebt_out_hook(void *priv, struct sk_buff *skb,
 	     const struct nf_hook_state *state)
 {
 	return ebt_do_table(skb, state, state->net->xt.frame_filter);

net/bridge/netfilter/ebtable_nat.c

@@ -57,14 +57,14 @@ static struct ebt_table frame_nat = {
 };
 
 static unsigned int
-ebt_nat_in(const struct nf_hook_ops *ops, struct sk_buff *skb,
+ebt_nat_in(void *priv, struct sk_buff *skb,
 	   const struct nf_hook_state *state)
 {
 	return ebt_do_table(skb, state, state->net->xt.frame_nat);
 }
 
 static unsigned int
-ebt_nat_out(const struct nf_hook_ops *ops, struct sk_buff *skb,
+ebt_nat_out(void *priv, struct sk_buff *skb,
 	    const struct nf_hook_state *state)
 {
 	return ebt_do_table(skb, state, state->net->xt.frame_nat);

net/bridge/netfilter/nf_tables_bridge.c

@@ -87,7 +87,7 @@ static inline void nft_bridge_set_pktinfo_ipv6(struct nft_pktinfo *pkt,
 }
 
 static unsigned int
-nft_do_chain_bridge(const struct nf_hook_ops *ops,
+nft_do_chain_bridge(void *priv,
 		    struct sk_buff *skb,
 		    const struct nf_hook_state *state)
 {
@@ -105,7 +105,7 @@ nft_do_chain_bridge(const struct nf_hook_ops *ops,
 		break;
 	}
 
-	return nft_do_chain(&pkt, ops);
+	return nft_do_chain(&pkt, priv);
 }
 
 static struct nft_af_info nft_af_bridge __read_mostly = {