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Diffstat (limited to 'net/bridge/br_forward.c')
-rw-r--r--net/bridge/br_forward.c203
1 files changed, 79 insertions, 124 deletions
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index f47759f05b6d..63a83d8d7da3 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -21,11 +21,6 @@
#include <linux/netfilter_bridge.h>
#include "br_private.h"
-static int deliver_clone(const struct net_bridge_port *prev,
- struct sk_buff *skb,
- void (*__packet_hook)(const struct net_bridge_port *p,
- struct sk_buff *skb));
-
/* Don't forward packets to originating port or forwarding disabled */
static inline int should_deliver(const struct net_bridge_port *p,
const struct sk_buff *skb)
@@ -75,105 +70,92 @@ int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
}
EXPORT_SYMBOL_GPL(br_forward_finish);
-static void __br_deliver(const struct net_bridge_port *to, struct sk_buff *skb)
+static void __br_forward(const struct net_bridge_port *to,
+ struct sk_buff *skb, bool local_orig)
{
struct net_bridge_vlan_group *vg;
+ struct net_device *indev;
+ struct net *net;
+ int br_hook;
vg = nbp_vlan_group_rcu(to);
skb = br_handle_vlan(to->br, vg, skb);
if (!skb)
return;
+ indev = skb->dev;
skb->dev = to->dev;
-
- if (unlikely(netpoll_tx_running(to->br->dev))) {
- if (!is_skb_forwardable(skb->dev, skb))
+ if (!local_orig) {
+ if (skb_warn_if_lro(skb)) {
kfree_skb(skb);
- else {
- skb_push(skb, ETH_HLEN);
- br_netpoll_send_skb(to, skb);
+ return;
}
- return;
+ br_hook = NF_BR_FORWARD;
+ skb_forward_csum(skb);
+ net = dev_net(indev);
+ } else {
+ if (unlikely(netpoll_tx_running(to->br->dev))) {
+ if (!is_skb_forwardable(skb->dev, skb)) {
+ kfree_skb(skb);
+ } else {
+ skb_push(skb, ETH_HLEN);
+ br_netpoll_send_skb(to, skb);
+ }
+ return;
+ }
+ br_hook = NF_BR_LOCAL_OUT;
+ net = dev_net(skb->dev);
+ indev = NULL;
}
- NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
- dev_net(skb->dev), NULL, skb,NULL, skb->dev,
+ NF_HOOK(NFPROTO_BRIDGE, br_hook,
+ net, NULL, skb, indev, skb->dev,
br_forward_finish);
}
-static void __br_forward(const struct net_bridge_port *to, struct sk_buff *skb)
+static int deliver_clone(const struct net_bridge_port *prev,
+ struct sk_buff *skb, bool local_orig)
{
- struct net_bridge_vlan_group *vg;
- struct net_device *indev;
-
- if (skb_warn_if_lro(skb)) {
- kfree_skb(skb);
- return;
- }
-
- vg = nbp_vlan_group_rcu(to);
- skb = br_handle_vlan(to->br, vg, skb);
- if (!skb)
- return;
-
- indev = skb->dev;
- skb->dev = to->dev;
- skb_forward_csum(skb);
-
- NF_HOOK(NFPROTO_BRIDGE, NF_BR_FORWARD,
- dev_net(indev), NULL, skb, indev, skb->dev,
- br_forward_finish);
-}
+ struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
-/* called with rcu_read_lock */
-void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb)
-{
- if (to && should_deliver(to, skb)) {
- __br_deliver(to, skb);
- return;
+ skb = skb_clone(skb, GFP_ATOMIC);
+ if (!skb) {
+ dev->stats.tx_dropped++;
+ return -ENOMEM;
}
- kfree_skb(skb);
+ __br_forward(prev, skb, local_orig);
+ return 0;
}
-EXPORT_SYMBOL_GPL(br_deliver);
-/* called with rcu_read_lock */
-void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, struct sk_buff *skb0)
+/**
+ * br_forward - forward a packet to a specific port
+ * @to: destination port
+ * @skb: packet being forwarded
+ * @local_rcv: packet will be received locally after forwarding
+ * @local_orig: packet is locally originated
+ *
+ * Should be called with rcu_read_lock.
+ */
+void br_forward(const struct net_bridge_port *to,
+ struct sk_buff *skb, bool local_rcv, bool local_orig)
{
if (to && should_deliver(to, skb)) {
- if (skb0)
- deliver_clone(to, skb, __br_forward);
+ if (local_rcv)
+ deliver_clone(to, skb, local_orig);
else
- __br_forward(to, skb);
+ __br_forward(to, skb, local_orig);
return;
}
- if (!skb0)
+ if (!local_rcv)
kfree_skb(skb);
}
-
-static int deliver_clone(const struct net_bridge_port *prev,
- struct sk_buff *skb,
- void (*__packet_hook)(const struct net_bridge_port *p,
- struct sk_buff *skb))
-{
- struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
-
- skb = skb_clone(skb, GFP_ATOMIC);
- if (!skb) {
- dev->stats.tx_dropped++;
- return -ENOMEM;
- }
-
- __packet_hook(prev, skb);
- return 0;
-}
+EXPORT_SYMBOL_GPL(br_forward);
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))
+ struct sk_buff *skb, bool local_orig)
{
int err;
@@ -183,7 +165,7 @@ static struct net_bridge_port *maybe_deliver(
if (!prev)
goto out;
- err = deliver_clone(prev, skb, __packet_hook);
+ err = deliver_clone(prev, skb, local_orig);
if (err)
return ERR_PTR(err);
@@ -191,17 +173,13 @@ out:
return p;
}
-/* called under bridge lock */
-static void br_flood(struct net_bridge *br, struct sk_buff *skb,
- struct sk_buff *skb0,
- void (*__packet_hook)(const struct net_bridge_port *p,
- struct sk_buff *skb),
- bool unicast)
+/* called under rcu_read_lock */
+void br_flood(struct net_bridge *br, struct sk_buff *skb,
+ bool unicast, bool local_rcv, bool local_orig)
{
+ u8 igmp_type = br_multicast_igmp_type(skb);
+ struct net_bridge_port *prev = NULL;
struct net_bridge_port *p;
- struct net_bridge_port *prev;
-
- prev = NULL;
list_for_each_entry_rcu(p, &br->port_list, list) {
/* Do not flood unicast traffic to ports that turn it off */
@@ -215,48 +193,36 @@ static void br_flood(struct net_bridge *br, struct sk_buff *skb,
BR_INPUT_SKB_CB(skb)->proxyarp_replied)
continue;
- prev = maybe_deliver(prev, p, skb, __packet_hook);
+ prev = maybe_deliver(prev, p, skb, local_orig);
if (IS_ERR(prev))
goto out;
+ if (prev == p)
+ br_multicast_count(p->br, p, skb, igmp_type,
+ BR_MCAST_DIR_TX);
}
if (!prev)
goto out;
- if (skb0)
- deliver_clone(prev, skb, __packet_hook);
+ if (local_rcv)
+ deliver_clone(prev, skb, local_orig);
else
- __packet_hook(prev, skb);
+ __br_forward(prev, skb, local_orig);
return;
out:
- if (!skb0)
+ if (!local_rcv)
kfree_skb(skb);
}
-
-/* called with rcu_read_lock */
-void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast)
-{
- br_flood(br, skb, NULL, __br_deliver, unicast);
-}
-
-/* called under bridge lock */
-void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
- struct sk_buff *skb2, bool unicast)
-{
- br_flood(br, skb, skb2, __br_forward, unicast);
-}
-
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
/* called with rcu_read_lock */
-static void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
- struct sk_buff *skb, struct sk_buff *skb0,
- void (*__packet_hook)(
- const struct net_bridge_port *p,
- struct sk_buff *skb))
+void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
+ struct sk_buff *skb,
+ bool local_rcv, bool local_orig)
{
struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
+ u8 igmp_type = br_multicast_igmp_type(skb);
struct net_bridge *br = netdev_priv(dev);
struct net_bridge_port *prev = NULL;
struct net_bridge_port_group *p;
@@ -274,9 +240,12 @@ static void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
port = (unsigned long)lport > (unsigned long)rport ?
lport : rport;
- prev = maybe_deliver(prev, port, skb, __packet_hook);
+ prev = maybe_deliver(prev, port, skb, local_orig);
if (IS_ERR(prev))
goto out;
+ if (prev == port)
+ br_multicast_count(port->br, port, skb, igmp_type,
+ BR_MCAST_DIR_TX);
if ((unsigned long)lport >= (unsigned long)port)
p = rcu_dereference(p->next);
@@ -287,28 +256,14 @@ static void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
if (!prev)
goto out;
- if (skb0)
- deliver_clone(prev, skb, __packet_hook);
+ if (local_rcv)
+ deliver_clone(prev, skb, local_orig);
else
- __packet_hook(prev, skb);
+ __br_forward(prev, skb, local_orig);
return;
out:
- if (!skb0)
+ if (!local_rcv)
kfree_skb(skb);
}
-
-/* called with rcu_read_lock */
-void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
- struct sk_buff *skb)
-{
- br_multicast_flood(mdst, skb, NULL, __br_deliver);
-}
-
-/* called with rcu_read_lock */
-void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
- struct sk_buff *skb, struct sk_buff *skb2)
-{
- br_multicast_flood(mdst, skb, skb2, __br_forward);
-}
#endif
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-04 12:11:30 +0300