diff mbox series

[net-next,v2,02/11] net: bridge: mcast: add wrappers for router node retrieval

Message ID 20210509194509.10849-3-linus.luessing@c0d3.blue (mailing list archive)
State Not Applicable, archived
Delegated to: Simon Wunderlich
Headers
Series net: bridge: split IPv4/v6 mc router state and export for batman-adv |

Commit Message

Linus Lüssing May 9, 2021, 7:45 p.m. UTC 
  In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants and to avoid IPv6 #ifdef clutter later add
two wrapper functions for router node retrieval in the payload
forwarding code.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
---
 net/bridge/br_forward.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

Comments

Nikolay Aleksandrov May 11, 2021, 9:12 a.m. UTC | #1 
On 09/05/2021 22:45, Linus Lüssing wrote:
> In preparation for the upcoming split of multicast router state into
> their IPv4 and IPv6 variants and to avoid IPv6 #ifdef clutter later add
> two wrapper functions for router node retrieval in the payload
> forwarding code.
> 
> Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
> ---
>  net/bridge/br_forward.c | 15 +++++++++++++--
>  1 file changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
> index 3b67184..b5ec4f9 100644
> --- a/net/bridge/br_forward.c
> +++ b/net/bridge/br_forward.c
> @@ -264,6 +264,16 @@ static void maybe_deliver_addr(struct net_bridge_port *p, struct sk_buff *skb,
>  	__br_forward(p, skb, local_orig);
>  }
>  
> +static inline struct hlist_node *
> +br_multicast_get_first_rport_node(struct net_bridge *b, struct sk_buff *skb) {
> +	return rcu_dereference(hlist_first_rcu(&b->ip4_mc_router_list));
> +}
> +
> +static inline struct net_bridge_port *
> +br_multicast_rport_from_node(struct hlist_node *rp, struct sk_buff *skb) {
> +	return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
> +}
> +

Inline functions in .c files are not allowed, please move these to br_private.h

>  /* called with rcu_read_lock */
>  void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
>  			struct sk_buff *skb,
> @@ -276,7 +286,8 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
>  	bool allow_mode_include = true;
>  	struct hlist_node *rp;
>  
> -	rp = rcu_dereference(hlist_first_rcu(&br->router_list));
> +	rp = br_multicast_get_first_rport_node(br, skb);
> +
>  	if (mdst) {
>  		p = rcu_dereference(mdst->ports);
>  		if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
> @@ -290,7 +301,7 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
>  		struct net_bridge_port *port, *lport, *rport;
>  
>  		lport = p ? p->key.port : NULL;
> -		rport = hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
> +		rport = br_multicast_rport_from_node(rp, skb);
>  
>  		if ((unsigned long)lport > (unsigned long)rport) {
>  			port = lport;
>
diff mbox series

Patch

diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 3b67184..b5ec4f9 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -264,6 +264,16 @@  static void maybe_deliver_addr(struct net_bridge_port *p, struct sk_buff *skb,
 	__br_forward(p, skb, local_orig);
 }
 
+static inline struct hlist_node *
+br_multicast_get_first_rport_node(struct net_bridge *b, struct sk_buff *skb) {
+	return rcu_dereference(hlist_first_rcu(&b->ip4_mc_router_list));
+}
+
+static inline struct net_bridge_port *
+br_multicast_rport_from_node(struct hlist_node *rp, struct sk_buff *skb) {
+	return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
+}
+
 /* called with rcu_read_lock */
 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 			struct sk_buff *skb,
@@ -276,7 +286,8 @@  void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 	bool allow_mode_include = true;
 	struct hlist_node *rp;
 
-	rp = rcu_dereference(hlist_first_rcu(&br->router_list));
+	rp = br_multicast_get_first_rport_node(br, skb);
+
 	if (mdst) {
 		p = rcu_dereference(mdst->ports);
 		if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
@@ -290,7 +301,7 @@  void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 		struct net_bridge_port *port, *lport, *rport;
 
 		lport = p ? p->key.port : NULL;
-		rport = hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
+		rport = br_multicast_rport_from_node(rp, skb);
 
 		if ((unsigned long)lport > (unsigned long)rport) {
 			port = lport;