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kernel: restore ebtables functionality by running netfilter hooks when the ebtables module is loaded 

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31141 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Felix Fietkau 2012-03-29 14:15:54 +00:00
parent 159ee54e58
commit 6f8b023b69
2 changed files with 122 additions and 74 deletions
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30
target/linux/generic/patches-3.2/644-bridge_optimize_netfilter_hooks.patch
View File

@ -1,12 +1,16 @@
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -62,6 +62,11 @@ static int brnf_filter_pppoe_tagged __re
@@ -62,6 +62,15 @@ static int brnf_filter_pppoe_tagged __re
#define brnf_filter_pppoe_tagged 0
#endif
+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;
+ return brnf_call_iptables | brnf_call_ip6tables | brnf_call_arptables |
+ brnf_call_ebtables;
+}
+
static inline __be16 vlan_proto(const struct sk_buff *skb)
@ -14,7 +18,11 @@
if (vlan_tx_tag_present(skb))
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -491,12 +491,25 @@ static inline bool br_multicast_is_route
@@ -488,15 +488,29 @@ static inline bool br_multicast_is_route
/* 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 *);
@ -120,3 +128,19 @@
dev_queue_xmit);
}
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -2399,11 +2399,13 @@ 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");

166
target/linux/generic/patches-3.3/644-bridge_optimize_netfilter_hooks.patch
View File

@ -1,74 +1,3 @@
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -40,7 +40,7 @@ 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);
}
@@ -199,7 +199,7 @@ 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 {
@@ -224,7 +224,7 @@ forward:
if (!compare_ether_addr(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_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -71,6 +71,11 @@ static int brnf_filter_pppoe_tagged __re
#define IS_ARP(skb) \
(!vlan_tx_tag_present(skb) && skb->protocol == htons(ETH_P_ARP))
+bool br_netfilter_run_hooks(void)
+{
+ return brnf_call_iptables | brnf_call_ip6tables | brnf_call_arptables;
+}
+
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
@@ -493,12 +493,25 @@ static inline bool br_multicast_is_route
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_forward.c
+++ b/net/bridge/br_forward.c
@@ -55,7 +55,7 @@ int br_dev_queue_push_xmit(struct sk_buf
@ -98,6 +27,35 @@
br_forward_finish);
}
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -40,7 +40,7 @@ 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);
}
@@ -199,7 +199,7 @@ 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 {
@@ -224,7 +224,7 @@ forward:
if (!compare_ether_addr(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
@@ -827,7 +827,7 @@ static void __br_multicast_send_query(st
@ -109,6 +67,56 @@
dev_queue_xmit);
} else
netif_rx(skb);
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -71,6 +71,15 @@ static int brnf_filter_pppoe_tagged __re
#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
@@ -490,15 +490,29 @@ static inline bool br_multicast_is_route
/* 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
@@ -52,7 +52,7 @@ static void br_send_bpdu(struct net_brid
@ -120,3 +128,19 @@
dev_queue_xmit);
}
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -2403,11 +2403,13 @@ 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");