kernel: bypass all netfilter hooks if the sysctls for that functionality have been disabled - eliminates the overhead of enabling CONFIG_BRIDGE_NETFILTER in the kernel config
SVN-Revision: 30917
This commit is contained in:
Felix Fietkau
parent
5744d736f2
commit
b387cfd6e4
@ -0,0 +1,76 @@
|
||||
--- a/net/bridge/br_netfilter.c
|
||||
+++ b/net/bridge/br_netfilter.c
|
||||
@@ -62,6 +62,11 @@ static int brnf_filter_pppoe_tagged __re
|
||||
#define brnf_filter_pppoe_tagged 0
|
||||
#endif
|
||||
|
||||
+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
|
||||
@@ -491,10 +491,12 @@ 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
|
||||
|
||||
/* br_stp.c */
|
||||
--- a/net/bridge/br_input.c
|
||||
+++ b/net/bridge/br_input.c
|
||||
@@ -26,6 +26,17 @@ const u8 br_group_address[ETH_ALEN] = {
|
||||
br_should_route_hook_t __rcu *br_should_route_hook __read_mostly;
|
||||
EXPORT_SYMBOL(br_should_route_hook);
|
||||
|
||||
+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);
|
||||
+}
|
||||
+
|
||||
static int br_pass_frame_up(struct sk_buff *skb)
|
||||
{
|
||||
struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev;
|
||||
@@ -40,7 +51,7 @@ 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 +210,7 @@ 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 +235,7 @@ 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:
|
||||
@ -0,0 +1,76 @@
|
||||
--- a/net/bridge/br_input.c
|
||||
+++ b/net/bridge/br_input.c
|
||||
@@ -26,6 +26,17 @@ const u8 br_group_address[ETH_ALEN] = {
|
||||
br_should_route_hook_t __rcu *br_should_route_hook __read_mostly;
|
||||
EXPORT_SYMBOL(br_should_route_hook);
|
||||
|
||||
+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);
|
||||
+}
|
||||
+
|
||||
static int br_pass_frame_up(struct sk_buff *skb)
|
||||
{
|
||||
struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev;
|
||||
@@ -40,7 +51,7 @@ 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);
|
||||
}
|
||||
|
||||
@@ -194,7 +205,7 @@ 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 {
|
||||
@@ -219,7 +230,7 @@ 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
|
||||
@@ -62,6 +62,11 @@ static int brnf_filter_pppoe_tagged __re
|
||||
#define brnf_filter_pppoe_tagged 0
|
||||
#endif
|
||||
|
||||
+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
|
||||
@@ -492,10 +492,12 @@ 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
|
||||
|
||||
/* br_stp.c */
|
||||
Loading…
Reference in New Issue
Block a user