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authorHerbert Xu <herbert@gondor.apana.org.au>2010-02-27 19:41:43 +0000
committerDavid S. Miller <davem@davemloft.net>2010-02-28 00:48:44 -0800
commit025d89c27f54c69cd0e51666d88aada33666bb6c (patch)
tree73063f6189c25d55c71ae6dad96a3711df87b7a6
parent6088a539d8d1666dca6979b5759bf966ee9124ef (diff)
bridge: Split may_deliver/deliver_clone out of br_flood
This patch moves the main loop body in br_flood into the function may_deliver. The code that clones an skb and delivers it is moved into the deliver_clone function. This allows this to be reused by the future multicast forward function. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/bridge/br_forward.c69
1 files changed, 46 insertions, 23 deletions
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 2e1cb434f6c..86cd0712d63 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -11,6 +11,7 @@
* 2 of the License, or (at your option) any later version.
*/
+#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
@@ -103,6 +104,44 @@ void br_forward(const struct net_bridge_port *to, struct sk_buff *skb)
kfree_skb(skb);
}
+static int deliver_clone(struct net_bridge_port *prev, struct sk_buff *skb,
+ void (*__packet_hook)(const struct net_bridge_port *p,
+ struct sk_buff *skb))
+{
+ skb = skb_clone(skb, GFP_ATOMIC);
+ if (!skb) {
+ struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
+
+ dev->stats.tx_dropped++;
+ return -ENOMEM;
+ }
+
+ __packet_hook(prev, skb);
+ return 0;
+}
+
+static struct net_bridge_port *maybe_deliver(
+ struct net_bridge_port *prev, struct net_bridge_port *p,
+ struct sk_buff *skb,
+ void (*__packet_hook)(const struct net_bridge_port *p,
+ struct sk_buff *skb))
+{
+ int err;
+
+ if (!should_deliver(p, skb))
+ return prev;
+
+ if (!prev)
+ goto out;
+
+ err = deliver_clone(prev, skb, __packet_hook);
+ if (err)
+ return ERR_PTR(err);
+
+out:
+ return p;
+}
+
/* called under bridge lock */
static void br_flood(struct net_bridge *br, struct sk_buff *skb,
struct sk_buff *skb0,
@@ -111,38 +150,22 @@ static void br_flood(struct net_bridge *br, struct sk_buff *skb,
{
struct net_bridge_port *p;
struct net_bridge_port *prev;
- struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
prev = NULL;
list_for_each_entry_rcu(p, &br->port_list, list) {
- if (should_deliver(p, skb)) {
- if (prev != NULL) {
- struct sk_buff *skb2;
-
- if ((skb2 = skb_clone(skb, GFP_ATOMIC)) == NULL) {
- dev->stats.tx_dropped++;
- goto out;
- }
-
- __packet_hook(prev, skb2);
- }
-
- prev = p;
- }
+ prev = maybe_deliver(prev, p, skb, __packet_hook);
+ if (IS_ERR(prev))
+ goto out;
}
if (!prev)
goto out;
- if (skb0) {
- skb = skb_clone(skb, GFP_ATOMIC);
- if (!skb) {
- dev->stats.tx_dropped++;
- goto out;
- }
- }
- __packet_hook(prev, skb);
+ if (skb0)
+ deliver_clone(prev, skb, __packet_hook);
+ else
+ __packet_hook(prev, skb);
return;
out: