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bridge: eliminate call by reference

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Change the bridging hook to be simple function with return value
rather than modifying the skb argument. This could generate better
code and is cleaner.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
This commit is contained in:
Stephen Hemminger
2007-03-21 13:38:47 -07:00
committed by David S. Miller
parent 604763722c
commit 6229e362dd
4 changed files with 32 additions and 25 deletions
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20
net/bridge/br_input.c
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@@ -121,13 +121,11 @@ static inline int is_link_local(const unsigned char *dest)
/*
* Called via br_handle_frame_hook.
* Return 0 if *pskb should be processed furthur
* 1 if *pskb is handled
* Return NULL if skb is handled
* note: already called with rcu_read_lock (preempt_disabled)
*/
int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb)
struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb)
{
struct sk_buff *skb = *pskb;
const unsigned char *dest = eth_hdr(skb)->h_dest;
if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
@@ -135,15 +133,15 @@ int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb)
if (unlikely(is_link_local(dest))) {
skb->pkt_type = PACKET_HOST;
return NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
NULL, br_handle_local_finish) != 0;
return (NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
NULL, br_handle_local_finish) == 0) ? skb : NULL;
}
if (p->state == BR_STATE_FORWARDING || p->state == BR_STATE_LEARNING) {
if (br_should_route_hook) {
if (br_should_route_hook(pskb))
return 0;
skb = *pskb;
if (br_should_route_hook(&skb))
return skb;
dest = eth_hdr(skb)->h_dest;
}
@@ -152,10 +150,10 @@ int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb)
NF_HOOK(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
br_handle_frame_finish);
return 1;
return NULL;
}
err:
kfree_skb(skb);
return 1;
return NULL;
}