16 files changed, 151 insertions, 104 deletions

diff --git a/include/linux/netfilter_bridge.h b/include/linux/netfilter_bridge.h
index fe996d59de64..c755e4971fa3 100644
--- a/include/linux/netfilter_bridge.h
+++ b/include/linux/netfilter_bridge.h
@@ -15,7 +15,7 @@ enum nf_br_hook_priorities {
         NF_BR_PRI_LAST = INT_MAX,
 };
 
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 
 #define BRNF_PKT_TYPE                   0x01
 #define BRNF_BRIDGED_DNAT               0x02
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 07c9fdd0c126..c4ff43f84573 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -156,7 +156,7 @@ struct nf_conntrack {
 };
 #endif
 
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 struct nf_bridge_info {
         atomic_t                use;
         unsigned int            mask;
@@ -560,7 +560,7 @@ struct sk_buff {
 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
         struct nf_conntrack     *nfct;
 #endif
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
         struct nf_bridge_info   *nf_bridge;
 #endif
 
@@ -2977,7 +2977,7 @@ static inline void nf_conntrack_get(struct nf_conntrack *nfct)
                 atomic_inc(&nfct->use);
 }
 #endif
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 static inline void nf_bridge_put(struct nf_bridge_info *nf_bridge)
 {
         if (nf_bridge && atomic_dec_and_test(&nf_bridge->use))
@@ -2995,7 +2995,7 @@ static inline void nf_reset(struct sk_buff *skb)
         nf_conntrack_put(skb->nfct);
         skb->nfct = NULL;
 #endif
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
         nf_bridge_put(skb->nf_bridge);
         skb->nf_bridge = NULL;
 #endif
@@ -3016,7 +3016,7 @@ static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src)
         nf_conntrack_get(src->nfct);
         dst->nfctinfo = src->nfctinfo;
 #endif
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
         dst->nf_bridge  = src->nf_bridge;
         nf_bridge_get(src->nf_bridge);
 #endif
@@ -3030,7 +3030,7 @@ static inline void nf_copy(struct sk_buff *dst, const struct sk_buff *src)
 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
         nf_conntrack_put(dst->nfct);
 #endif
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
         nf_bridge_put(dst->nf_bridge);
 #endif
         __nf_copy(dst, src);
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 47f425464f84..f60558d0254c 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -373,7 +373,7 @@ static inline int neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
         return 0;
 }
 
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 static inline int neigh_hh_bridge(struct hh_cache *hh, struct sk_buff *skb)
 {
         unsigned int seq, hh_alen;
diff --git a/include/net/netfilter/ipv4/nf_reject.h b/include/net/netfilter/ipv4/nf_reject.h
index 931fbf812171..f713b5a31d62 100644
--- a/include/net/netfilter/ipv4/nf_reject.h
+++ b/include/net/netfilter/ipv4/nf_reject.h
@@ -98,7 +98,7 @@ static void nf_send_reset(struct sk_buff *oldskb, int hook)
 
         nf_ct_attach(nskb, oldskb);
 
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
         /* If we use ip_local_out for bridged traffic, the MAC source on
          * the RST will be ours, instead of the destination's.  This confuses
          * some routers/firewalls, and they drop the packet.  So we need to
diff --git a/include/net/netfilter/ipv6/nf_reject.h b/include/net/netfilter/ipv6/nf_reject.h
index 710d17ed70b4..7a10cfcd8e33 100644
--- a/include/net/netfilter/ipv6/nf_reject.h
+++ b/include/net/netfilter/ipv6/nf_reject.h
@@ -147,7 +147,7 @@ static void nf_send_reset6(struct net *net, struct sk_buff *oldskb, int hook)
 
         nf_ct_attach(nskb, oldskb);
 
-#ifdef CONFIG_BRIDGE_NETFILTER
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
         /* If we use ip6_local_out for bridged traffic, the MAC source on
          * the RST will be ours, instead of the destination's.  This confuses
          * some routers/firewalls, and they drop the packet.  So we need to
diff --git a/net/Kconfig b/net/Kconfig
index 4051fdfa4367..dc5d700d05e7 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -176,10 +176,11 @@ config NETFILTER_ADVANCED
           If unsure, say Y.
 
 config BRIDGE_NETFILTER
-        bool "Bridged IP/ARP packets filtering"
-        depends on BRIDGE && NETFILTER && INET
+        tristate "Bridged IP/ARP packets filtering"
+        depends on (BRIDGE || BRIDGE=n)
+        depends on NETFILTER && INET
         depends on NETFILTER_ADVANCED
-        default y
+        default m
         ---help---
           Enabling this option will let arptables resp. iptables see bridged
           ARP resp. IP traffic. If you want a bridging firewall, you probably
diff --git a/net/bridge/Makefile b/net/bridge/Makefile
index 8590b942bffa..5e3eac5dc8b9 100644
--- a/net/bridge/Makefile
+++ b/net/bridge/Makefile
@@ -6,11 +6,12 @@ obj-$(CONFIG_BRIDGE) += bridge.o
 
 bridge-y        := br.o br_device.o br_fdb.o br_forward.o br_if.o br_input.o \
                         br_ioctl.o br_stp.o br_stp_bpdu.o \
-                        br_stp_if.o br_stp_timer.o br_netlink.o
+                        br_stp_if.o br_stp_timer.o br_netlink.o \
+                        br_nf_core.o
 
 bridge-$(CONFIG_SYSFS) += br_sysfs_if.o br_sysfs_br.o
 
-bridge-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o
+obj-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o
 
 bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o
 
diff --git a/net/bridge/br.c b/net/bridge/br.c
index 1a755a1e5410..44425aff7cba 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -161,7 +161,7 @@ static int __init br_init(void)
         if (err)
                 goto err_out1;
 
-        err = br_netfilter_init();
+        err = br_nf_core_init();
         if (err)
                 goto err_out2;
 
@@ -179,11 +179,16 @@ static int __init br_init(void)