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Commit 92534d04 authored by Ravinder Konka's avatar Ravinder Konka Committed by Gerrit - the friendly Code Review server
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bridge: Add bridge API to access the bridge slave port 



This API is needed by the NSS connection manager modules
to enable NSS fast path for bridge flows. The connection
manager needs to inspect the netdevice of the bridge slave
port that has learned a given MAC address.
Currently no such API exists that is exported out of the
kernel network stack for this purpose.

Change-Id: I3f8848739d820346135b09b93f760122874468fd
Signed-off-by: default avatarRavinder konka <rkonka@codeaurora.org>
Signed-off-by: default avatarMohammed Javid <mjavid@codeaurora.org>
parent cc8c86a2

include/linux/if_bridge.h

+2 −0
Original line number Diff line number Diff line
@@ -53,6 +53,8 @@ extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __use 


typedef int br_should_route_hook_t(struct sk_buff *skb);

extern br_should_route_hook_t __rcu *br_should_route_hook;

extern struct net_device *br_port_dev_get(struct net_device *dev,

						unsigned char *addr);



#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)

int br_multicast_list_adjacent(struct net_device *dev,

net/bridge/br_if.c

+31 −0
Original line number Diff line number Diff line
@@ -655,3 +655,34 @@ void br_port_flags_change(struct net_bridge_port *p, unsigned long mask) 
	if (mask & BR_AUTO_MASK)

		nbp_update_port_count(br);

}



/* br_port_dev_get()

 * Using the given addr, identify the port to which it is reachable,

 * returing a reference to the net device associated with that port.

 *

 * NOTE: Return NULL if given dev is not a bridge or

 *       the mac has no associated port

 */

struct net_device *br_port_dev_get(struct net_device *dev, unsigned char *addr)

{

	struct net_bridge_fdb_entry *fdbe;

	struct net_bridge *br;

	struct net_device *netdev = NULL;



	/* Is this a bridge? */

	if (!(dev->priv_flags & IFF_EBRIDGE))

		return NULL;



	br = netdev_priv(dev);



	/* Lookup the fdb entry and get reference to the port dev */

	rcu_read_lock();

	fdbe = __br_fdb_get(br, addr, 0);

	if (fdbe && fdbe->dst) {

		netdev = fdbe->dst->dev; /* port device */

		dev_hold(netdev);

	}

	rcu_read_unlock();

	return netdev;

}

EXPORT_SYMBOL(br_port_dev_get);