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authorJiri Pirko <jpirko@redhat.com>2011-03-12 03:14:39 +0000
committerDavid S. Miller <davem@davemloft.net>2011-03-16 12:53:54 -0700
commit8a4eb5734e8d1dc60a8c28576bbbdfdcc643626d (patch)
treeed4cd2f9a2a04a30994a8f8964a81834c895c0c9 /net/bridge/br_input.c
parent2d7011ca79f1a8792e04d131b8ea21db179ab917 (diff)
downloadlinux-8a4eb5734e8d1dc60a8c28576bbbdfdcc643626d.tar.bz2
net: introduce rx_handler results and logic around that
This patch allows rx_handlers to better signalize what to do next to it's caller. That makes skb->deliver_no_wcard no longer needed. kernel-doc for rx_handler_result is taken from Nicolas' patch. Signed-off-by: Jiri Pirko <jpirko@redhat.com> Reviewed-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_input.c')
-rw-r--r--net/bridge/br_input.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 88e4aa9cb1f9..e2160792e1bc 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -139,21 +139,22 @@ static inline int is_link_local(const unsigned char *dest)
* Return NULL if skb is handled
* note: already called with rcu_read_lock
*/
-struct sk_buff *br_handle_frame(struct sk_buff *skb)
+rx_handler_result_t br_handle_frame(struct sk_buff **pskb)
{
struct net_bridge_port *p;
+ struct sk_buff *skb = *pskb;
const unsigned char *dest = eth_hdr(skb)->h_dest;
br_should_route_hook_t *rhook;
if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
- return skb;
+ return RX_HANDLER_PASS;
if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
goto drop;
skb = skb_share_check(skb, GFP_ATOMIC);
if (!skb)
- return NULL;
+ return RX_HANDLER_CONSUMED;
p = br_port_get_rcu(skb->dev);
@@ -167,10 +168,12 @@ struct sk_buff *br_handle_frame(struct sk_buff *skb)
goto forward;
if (NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
- NULL, br_handle_local_finish))
- return NULL; /* frame consumed by filter */
- else
- return skb; /* continue processing */
+ NULL, br_handle_local_finish)) {
+ return RX_HANDLER_CONSUMED; /* consumed by filter */
+ } else {
+ *pskb = skb;
+ return RX_HANDLER_PASS; /* continue processing */
+ }
}
forward:
@@ -178,8 +181,10 @@ forward:
case BR_STATE_FORWARDING:
rhook = rcu_dereference(br_should_route_hook);
if (rhook) {
- if ((*rhook)(skb))
- return skb;
+ if ((*rhook)(skb)) {
+ *pskb = skb;
+ return RX_HANDLER_PASS;
+ }
dest = eth_hdr(skb)->h_dest;
}
/* fall through */
@@ -194,5 +199,5 @@ forward:
drop:
kfree_skb(skb);
}
- return NULL;
+ return RX_HANDLER_CONSUMED;
}