[generic:] preliminary 3.12 support

[openwrt.git] / target / linux / generic / patches-3.12 / 644-bridge_optimize_netfilter_hooks.patch

diff --git a/target/linux/generic/patches-3.12/644-bridge_optimize_netfilter_hooks.patch b/target/linux/generic/patches-3.12/644-bridge_optimize_netfilter_hooks.patch
new file mode 100644 (file)
index 0000000..b657981
--- /dev/null
+++ b/target/linux/generic/patches-3.12/644-bridge_optimize_netfilter_hooks.patch
@@ -0,0 +1,155 @@
+--- a/net/bridge/br_forward.c
++++ b/net/bridge/br_forward.c
+@@ -57,7 +57,7 @@ int br_dev_queue_push_xmit(struct sk_buf
+ 
+ int br_forward_finish(struct sk_buff *skb)
+ {
+-      return NF_HOOK(NFPROTO_BRIDGE, NF_BR_POST_ROUTING, skb, NULL, skb->dev,
++      return BR_HOOK(NFPROTO_BRIDGE, NF_BR_POST_ROUTING, skb, NULL, skb->dev,
+                      br_dev_queue_push_xmit);
+ 
+ }
+@@ -80,7 +80,7 @@ static void __br_deliver(const struct ne
+               return;
+       }
+ 
+-      NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
++      BR_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
+               br_forward_finish);
+ }
+ 
+@@ -101,7 +101,7 @@ static void __br_forward(const struct ne
+       skb->dev = to->dev;
+       skb_forward_csum(skb);
+ 
+-      NF_HOOK(NFPROTO_BRIDGE, NF_BR_FORWARD, skb, indev, skb->dev,
++      BR_HOOK(NFPROTO_BRIDGE, NF_BR_FORWARD, skb, indev, skb->dev,
+               br_forward_finish);
+ }
+ 
+--- a/net/bridge/br_input.c
++++ b/net/bridge/br_input.c
+@@ -52,7 +52,7 @@ static int br_pass_frame_up(struct sk_bu
+       indev = skb->dev;
+       skb->dev = brdev;
+ 
+-      return NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL,
++      return BR_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL,
+                      netif_receive_skb);
+ }
+ 
+@@ -213,7 +213,7 @@ rx_handler_result_t br_handle_frame(stru
+               }
+ 
+               /* Deliver packet to local host only */
+-              if (NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
++              if (BR_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
+                           NULL, br_handle_local_finish)) {
+                       return RX_HANDLER_CONSUMED; /* consumed by filter */
+               } else {
+@@ -228,7 +228,7 @@ forward:
+               if (ether_addr_equal(p->br->dev->dev_addr, dest))
+                       skb->pkt_type = PACKET_HOST;
+ 
+-              if (NF_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
++              if (BR_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
+                       br_handle_local_finish))
+                       break;
+ 
+@@ -250,7 +250,7 @@ forward:
+               if (ether_addr_equal(p->br->dev->dev_addr, dest))
+                       skb->pkt_type = PACKET_HOST;
+ 
+-              NF_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
++              BR_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
+                       br_handle_frame_finish);
+               break;
+       default:
+--- a/net/bridge/br_multicast.c
++++ b/net/bridge/br_multicast.c
+@@ -799,7 +799,7 @@ static void __br_multicast_send_query(st
+       if (port) {
+               __skb_push(skb, sizeof(struct ethhdr));
+               skb->dev = port->dev;
+-              NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
++              BR_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
+                       dev_queue_xmit);
+       } else
+               netif_rx(skb);
+--- a/net/bridge/br_netfilter.c
++++ b/net/bridge/br_netfilter.c
+@@ -73,6 +73,15 @@ static int brnf_pass_vlan_indev __read_m
+ #define IS_ARP(skb) \
+       (!vlan_tx_tag_present(skb) && skb->protocol == htons(ETH_P_ARP))
+ 
++int brnf_call_ebtables __read_mostly = 0;
++EXPORT_SYMBOL_GPL(brnf_call_ebtables);
++
++bool br_netfilter_run_hooks(void)
++{
++      return brnf_call_iptables | brnf_call_ip6tables | brnf_call_arptables |
++             brnf_call_ebtables;
++}
++
+ static inline __be16 vlan_proto(const struct sk_buff *skb)
+ {
+       if (vlan_tx_tag_present(skb))
+--- a/net/bridge/br_private.h
++++ b/net/bridge/br_private.h
+@@ -728,15 +728,29 @@ static inline u16 br_get_pvid(const stru
+ 
+ /* br_netfilter.c */
+ #ifdef CONFIG_BRIDGE_NETFILTER
++extern int brnf_call_ebtables;
+ extern int br_netfilter_init(void);
+ extern void br_netfilter_fini(void);
+ extern void br_netfilter_rtable_init(struct net_bridge *);
++extern bool br_netfilter_run_hooks(void);
+ #else
+ #define br_netfilter_init()   (0)
+ #define br_netfilter_fini()   do { } while(0)
+ #define br_netfilter_rtable_init(x)
++#define br_netfilter_run_hooks()      false
+ #endif
+ 
++static inline int
++BR_HOOK(uint8_t pf, unsigned int hook, struct sk_buff *skb,
++      struct net_device *in, struct net_device *out,
++      int (*okfn)(struct sk_buff *))
++{
++      if (!br_netfilter_run_hooks())
++              return okfn(skb);
++
++      return NF_HOOK(pf, hook, skb, in, out, okfn);
++}
++
+ /* br_stp.c */
+ extern void br_log_state(const struct net_bridge_port *p);
+ extern struct net_bridge_port *br_get_port(struct net_bridge *br,
+--- a/net/bridge/br_stp_bpdu.c
++++ b/net/bridge/br_stp_bpdu.c
+@@ -54,7 +54,7 @@ static void br_send_bpdu(struct net_brid
+ 
+       skb_reset_mac_header(skb);
+ 
+-      NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
++      BR_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
+               dev_queue_xmit);
+ }
+ 
+--- a/net/bridge/netfilter/ebtables.c
++++ b/net/bridge/netfilter/ebtables.c
+@@ -2407,11 +2407,13 @@ static int __init ebtables_init(void)
+       }
+ 
+       printk(KERN_INFO "Ebtables v2.0 registered\n");
++      brnf_call_ebtables = 1;
+       return 0;
+ }
+ 
+ static void __exit ebtables_fini(void)
+ {
++      brnf_call_ebtables = 0;
+       nf_unregister_sockopt(&ebt_sockopts);
+       xt_unregister_target(&ebt_standard_target);
+       printk(KERN_INFO "Ebtables v2.0 unregistered\n");