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-rw-r--r--net/bridge/br_forward.c35
-rw-r--r--net/bridge/br_input.c25
-rw-r--r--net/bridge/br_private.h10
3 files changed, 33 insertions, 37 deletions
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index d610644368b9..204f99304a8a 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -138,17 +138,18 @@ void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb)
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)
+void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
+ bool local_rcv)
{
if (to && should_deliver(to, skb)) {
- if (skb0)
+ if (local_rcv)
deliver_clone(to, skb, __br_forward);
else
__br_forward(to, skb);
return;
}
- if (!skb0)
+ if (!local_rcv)
kfree_skb(skb);
}
@@ -193,10 +194,9 @@ out:
/* 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)
+ bool local_rcv, bool unicast)
{
u8 igmp_type = br_multicast_igmp_type(skb);
struct net_bridge_port *prev;
@@ -227,14 +227,14 @@ static void br_flood(struct net_bridge *br, struct sk_buff *skb,
if (!prev)
goto out;
- if (skb0)
+ if (local_rcv)
deliver_clone(prev, skb, __packet_hook);
else
__packet_hook(prev, skb);
return;
out:
- if (!skb0)
+ if (!local_rcv)
kfree_skb(skb);
}
@@ -242,23 +242,24 @@ out:
/* 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);
+ br_flood(br, skb, __br_deliver, false, unicast);
}
/* called under bridge lock */
void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
- struct sk_buff *skb2, bool unicast)
+ bool local_rcv, bool unicast)
{
- br_flood(br, skb, skb2, __br_forward, unicast);
+ br_flood(br, skb, __br_forward, local_rcv, 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,
+ struct sk_buff *skb,
void (*__packet_hook)(
const struct net_bridge_port *p,
- struct sk_buff *skb))
+ struct sk_buff *skb),
+ bool local_rcv)
{
struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
u8 igmp_type = br_multicast_igmp_type(skb);
@@ -295,14 +296,14 @@ static void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
if (!prev)
goto out;
- if (skb0)
+ if (local_rcv)
deliver_clone(prev, skb, __packet_hook);
else
__packet_hook(prev, skb);
return;
out:
- if (!skb0)
+ if (!local_rcv)
kfree_skb(skb);
}
@@ -310,13 +311,13 @@ out:
void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
struct sk_buff *skb)
{
- br_multicast_flood(mdst, skb, NULL, __br_deliver);
+ br_multicast_flood(mdst, skb, __br_deliver, false);
}
/* called with rcu_read_lock */
void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
- struct sk_buff *skb, struct sk_buff *skb2)
+ struct sk_buff *skb, bool local_rcv)
{
- br_multicast_flood(mdst, skb, skb2, __br_forward);
+ br_multicast_flood(mdst, skb, __br_forward, local_rcv);
}
#endif
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index c20c5be6fc22..dd8885def11b 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -131,13 +131,12 @@ static void br_do_proxy_arp(struct sk_buff *skb, struct net_bridge *br,
/* note: already called with rcu_read_lock */
int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
{
+ bool local_rcv = false, mcast_hit = false, unicast = true;
struct net_bridge_port *p = br_port_get_rcu(skb->dev);
const unsigned char *dest = eth_hdr(skb)->h_dest;
struct net_bridge_fdb_entry *dst = NULL;
- bool mcast_hit = false, unicast = true;
struct net_bridge_mdb_entry *mdst;
struct net_bridge *br;
- struct sk_buff *skb2;
u16 vid = 0;
if (!p || p->state == BR_STATE_DISABLED)
@@ -160,17 +159,13 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
BR_INPUT_SKB_CB(skb)->brdev = br->dev;
- /* The packet skb2 goes to the local host (NULL to skip). */
- skb2 = NULL;
-
- if (br->dev->flags & IFF_PROMISC)
- skb2 = skb;
+ local_rcv = !!(br->dev->flags & IFF_PROMISC);
if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))
br_do_proxy_arp(skb, br, vid, p);
if (is_broadcast_ether_addr(dest)) {
- skb2 = skb;
+ local_rcv = true;
unicast = false;
} else if (is_multicast_ether_addr(dest)) {
mdst = br_mdb_get(br, skb, vid);
@@ -178,12 +173,12 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
br_multicast_querier_exists(br, eth_hdr(skb))) {
if ((mdst && mdst->mglist) ||
br_multicast_is_router(br)) {
- skb2 = skb;
+ local_rcv = true;
br->dev->stats.multicast++;
}
mcast_hit = true;
} else {
- skb2 = skb;
+ local_rcv = true;
br->dev->stats.multicast++;
}
unicast = false;
@@ -194,16 +189,16 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
if (dst) {
dst->used = jiffies;
- br_forward(dst->dst, skb, skb2);
+ br_forward(dst->dst, skb, local_rcv);
} else {
if (!mcast_hit)
- br_flood_forward(br, skb, skb2, unicast);
+ br_flood_forward(br, skb, local_rcv, unicast);
else
- br_multicast_forward(mdst, skb, skb2);
+ br_multicast_forward(mdst, skb, local_rcv);
}
- if (skb2)
- return br_pass_frame_up(skb2);
+ if (local_rcv)
+ return br_pass_frame_up(skb);
out:
return 0;
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 40f200947ddc..4d6cdf459e57 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -507,12 +507,12 @@ int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
/* br_forward.c */
void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
-void br_forward(const struct net_bridge_port *to,
- struct sk_buff *skb, struct sk_buff *skb0);
+void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
+ bool local_rcv);
int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
- struct sk_buff *skb2, bool unicast);
+ bool local_rcv, bool unicast);
/* br_if.c */
void br_port_carrier_check(struct net_bridge_port *p);
@@ -563,7 +563,7 @@ void br_multicast_dev_del(struct net_bridge *br);
void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
struct sk_buff *skb);
void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
- struct sk_buff *skb, struct sk_buff *skb2);
+ struct sk_buff *skb, bool local_rcv);
int br_multicast_set_router(struct net_bridge *br, unsigned long val);
int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
int br_multicast_toggle(struct net_bridge *br, unsigned long val);
@@ -698,7 +698,7 @@ static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
struct sk_buff *skb,
- struct sk_buff *skb2)
+ bool local_rcv)
{
}
static inline bool br_multicast_is_router(struct net_bridge *br)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.