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net: bridge: update multicast stats from maybe_deliver()

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Simplify this code by updating bridge multicast stats from
maybe_deliver().

Note that commit 6db6f0eae6 ("bridge: multicast to unicast"), in case
the port flag BR_MULTICAST_TO_UNICAST is set, never updates the previous
port pointer, therefore it is always going to be different from the
existing port in this deduplicated list iteration.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2019-04-04 13:56:38 +02:00 committed by David S. Miller
parent 942f146a63
commit 847d44efad
1 changed files with 4 additions and 11 deletions
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15
net/bridge/br_forward.c
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@ -173,6 +173,7 @@ static struct net_bridge_port *maybe_deliver(
struct net_bridge_port *prev, struct net_bridge_port *p,
struct sk_buff *skb, bool local_orig)
{
u8 igmp_type = br_multicast_igmp_type(skb);
int err;
if (!should_deliver(p, skb))
@ -184,8 +185,9 @@ static struct net_bridge_port *maybe_deliver(
err = deliver_clone(prev, skb, local_orig);
if (err)
return ERR_PTR(err);
out:
br_multicast_count(p->br, p, skb, igmp_type, BR_MCAST_DIR_TX);
return p;
}
@ -193,7 +195,6 @@ out:
void br_flood(struct net_bridge *br, struct sk_buff *skb,
enum br_pkt_type pkt_type, 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;
@ -226,9 +227,6 @@ void br_flood(struct net_bridge *br, struct sk_buff *skb,
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)
@ -277,7 +275,6 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
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;
@ -304,13 +301,9 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
}
prev = maybe_deliver(prev, port, skb, local_orig);
delivered:
if (IS_ERR(prev))
goto out;
if (prev == port)
br_multicast_count(port->br, port, skb, igmp_type,
BR_MCAST_DIR_TX);
delivered:
if ((unsigned long)lport >= (unsigned long)port)
p = rcu_dereference(p->next);
if ((unsigned long)rport >= (unsigned long)port)