Merge branch 'rmnet-Rewrite-some-existing-functionality'

Subash Abhinov Kasiviswanathan says:

====================
net: qualcomm: rmnet: Rewrite some existing functionality

This series fixes some of the broken rmnet functionality.
Bridge mode is re-written and made useable and the muxed_ep is converted to hlist.

Patches 1-5 are cleanups in preparation for these changes.
Patch 6 does the hlist conversion.
Patch 7 has the implementation of the rmnet bridge mode.

v1->v2: Fix the warning and code style issue in rmnet_rx_handler as
mentioned by David.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c

@@ -61,23 +61,6 @@ rmnet_get_port_rtnl(const struct net_device *real_dev)
 	return rtnl_dereference(real_dev->rx_handler_data);
 }
 
-static struct rmnet_endpoint*
-rmnet_get_endpoint(struct net_device *dev, int config_id)
-{
-	struct rmnet_endpoint *ep;
-	struct rmnet_port *port;
-
-	if (!rmnet_is_real_dev_registered(dev)) {
-		ep = rmnet_vnd_get_endpoint(dev);
-	} else {
-		port = rmnet_get_port_rtnl(dev);
-
-		ep = &port->muxed_ep[config_id];
-	}
-
-	return ep;
-}
-
 static int rmnet_unregister_real_device(struct net_device *real_dev,
 					struct rmnet_port *port)
 {
@@ -98,7 +81,7 @@ static int rmnet_unregister_real_device(struct net_device *real_dev,
 static int rmnet_register_real_device(struct net_device *real_dev)
 {
 	struct rmnet_port *port;
-	int rc;
+	int rc, entry;
 
 	ASSERT_RTNL();
 
@@ -119,27 +102,41 @@ static int rmnet_register_real_device(struct net_device *real_dev)
 	/* hold on to real dev for MAP data */
 	dev_hold(real_dev);
 
+	for (entry = 0; entry < RMNET_MAX_LOGICAL_EP; entry++)
+		INIT_HLIST_HEAD(&port->muxed_ep[entry]);
+
 	netdev_dbg(real_dev, "registered with rmnet\n");
 	return 0;
 }
 
-static void rmnet_set_endpoint_config(struct net_device *dev,
-				      u8 mux_id, u8 rmnet_mode,
-				      struct net_device *egress_dev)
+static void rmnet_unregister_bridge(struct net_device *dev,
+				    struct rmnet_port *port)
 {
-	struct rmnet_endpoint *ep;
+	struct net_device *rmnet_dev, *bridge_dev;
+	struct rmnet_port *bridge_port;
 
-	netdev_dbg(dev, "id %d mode %d dev %s\n",
-		   mux_id, rmnet_mode, egress_dev->name);
+	if (port->rmnet_mode != RMNET_EPMODE_BRIDGE)
+		return;
 
-	ep = rmnet_get_endpoint(dev, mux_id);
-	/* This config is cleared on every set, so its ok to not
-	 * clear it on a device delete.
-	 */
-	memset(ep, 0, sizeof(struct rmnet_endpoint));
-	ep->rmnet_mode = rmnet_mode;
-	ep->egress_dev = egress_dev;
-	ep->mux_id = mux_id;
+	/* bridge slave handling */
+	if (!port->nr_rmnet_devs) {
+		rmnet_dev = netdev_master_upper_dev_get_rcu(dev);
+		netdev_upper_dev_unlink(dev, rmnet_dev);
+
+		bridge_dev = port->bridge_ep;
+
+		bridge_port = rmnet_get_port_rtnl(bridge_dev);
+		bridge_port->bridge_ep = NULL;
+		bridge_port->rmnet_mode = RMNET_EPMODE_VND;
+	} else {
+		bridge_dev = port->bridge_ep;
+
+		bridge_port = rmnet_get_port_rtnl(bridge_dev);
+		rmnet_dev = netdev_master_upper_dev_get_rcu(bridge_dev);
+		netdev_upper_dev_unlink(bridge_dev, rmnet_dev);
+
+		rmnet_unregister_real_device(bridge_dev, bridge_port);
+	}
 }
 
 static int rmnet_newlink(struct net *src_net, struct net_device *dev,
@@ -153,6 +150,7 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
 			    RMNET_EGRESS_FORMAT_MAP;
 	struct net_device *real_dev;
 	int mode = RMNET_EPMODE_VND;
+	struct rmnet_endpoint *ep;
 	struct rmnet_port *port;
 	int err = 0;
 	u16 mux_id;
@@ -164,6 +162,10 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
 	if (!data[IFLA_VLAN_ID])
 		return -EINVAL;
 
+	ep = kzalloc(sizeof(*ep), GFP_ATOMIC);
+	if (!ep)
+		return -ENOMEM;
+
 	mux_id = nla_get_u16(data[IFLA_VLAN_ID]);
 
 	err = rmnet_register_real_device(real_dev);
@@ -171,7 +173,7 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
 		goto err0;
 
 	port = rmnet_get_port_rtnl(real_dev);
-	err = rmnet_vnd_newlink(mux_id, dev, port, real_dev);
+	err = rmnet_vnd_newlink(mux_id, dev, port, real_dev, ep);
 	if (err)
 		goto err1;
 
@@ -183,13 +185,13 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
 		   ingress_format, egress_format);
 	port->egress_data_format = egress_format;
 	port->ingress_data_format = ingress_format;
+	port->rmnet_mode = mode;
 
-	rmnet_set_endpoint_config(real_dev, mux_id, mode, dev);
-	rmnet_set_endpoint_config(dev, mux_id, mode, real_dev);
+	hlist_add_head_rcu(&ep->hlnode, &port->muxed_ep[mux_id]);
 	return 0;
 
 err2:
-	rmnet_vnd_dellink(mux_id, port);
+	rmnet_vnd_dellink(mux_id, port, ep);
 err1:
 	rmnet_unregister_real_device(real_dev, port);
 err0:
@@ -199,6 +201,7 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
 static void rmnet_dellink(struct net_device *dev, struct list_head *head)
 {
 	struct net_device *real_dev;
+	struct rmnet_endpoint *ep;
 	struct rmnet_port *port;
 	u8 mux_id;
 
@@ -212,8 +215,15 @@ static void rmnet_dellink(struct net_device *dev, struct list_head *head)
 	port = rmnet_get_port_rtnl(real_dev);
 
 	mux_id = rmnet_vnd_get_mux(dev);
-	rmnet_vnd_dellink(mux_id, port);
 	netdev_upper_dev_unlink(dev, real_dev);
+
+	ep = rmnet_get_endpoint(port, mux_id);
+	if (ep) {
+		hlist_del_init_rcu(&ep->hlnode);
+		rmnet_unregister_bridge(dev, port);
+		rmnet_vnd_dellink(mux_id, port, ep);
+		kfree(ep);
+	}
 	rmnet_unregister_real_device(real_dev, port);
 
 	unregister_netdevice_queue(dev, head);
@@ -222,11 +232,16 @@ static void rmnet_dellink(struct net_device *dev, struct list_head *head)
 static int rmnet_dev_walk_unreg(struct net_device *rmnet_dev, void *data)
 {
 	struct rmnet_walk_data *d = data;
+	struct rmnet_endpoint *ep;
 	u8 mux_id;
 
 	mux_id = rmnet_vnd_get_mux(rmnet_dev);
-
-	rmnet_vnd_dellink(mux_id, d->port);
+	ep = rmnet_get_endpoint(d->port, mux_id);
+	if (ep) {
+		hlist_del_init_rcu(&ep->hlnode);
+		rmnet_vnd_dellink(mux_id, d->port, ep);
+		kfree(ep);
+	}
 	netdev_upper_dev_unlink(rmnet_dev, d->real_dev);
 	unregister_netdevice_queue(rmnet_dev, d->head);
 
@@ -252,6 +267,8 @@ static void rmnet_force_unassociate_device(struct net_device *dev)
 	d.port = port;
 
 	rcu_read_lock();
+	rmnet_unregister_bridge(dev, port);
+
 	netdev_walk_all_lower_dev_rcu(real_dev, rmnet_dev_walk_unreg, &d);
 	rcu_read_unlock();
 	unregister_netdevice_many(&list);
@@ -324,6 +341,77 @@ struct rmnet_port *rmnet_get_port(struct net_device *real_dev)
 		return NULL;
 }
 
+struct rmnet_endpoint *rmnet_get_endpoint(struct rmnet_port *port, u8 mux_id)
+{
+	struct rmnet_endpoint *ep;
+
+	hlist_for_each_entry_rcu(ep, &port->muxed_ep[mux_id], hlnode) {
+		if (ep->mux_id == mux_id)
+			return ep;
+	}
+
+	return NULL;
+}
+
+int rmnet_add_bridge(struct net_device *rmnet_dev,
+		     struct net_device *slave_dev,
+		     struct netlink_ext_ack *extack)
+{
+	struct rmnet_priv *priv = netdev_priv(rmnet_dev);
+	struct net_device *real_dev = priv->real_dev;
+	struct rmnet_port *port, *slave_port;
+	int err;
+
+	port = rmnet_get_port(real_dev);
+
+	/* If there is more than one rmnet dev attached, its probably being
+	 * used for muxing. Skip the briding in that case
+	 */
+	if (port->nr_rmnet_devs > 1)
+		return -EINVAL;
+
+	if (rmnet_is_real_dev_registered(slave_dev))
+		return -EBUSY;
+
+	err = rmnet_register_real_device(slave_dev);
+	if (err)
+		return -EBUSY;
+
+	err = netdev_master_upper_dev_link(slave_dev, rmnet_dev, NULL, NULL,
+					   extack);
+	if (err)
+		return -EINVAL;
+
+	slave_port = rmnet_get_port(slave_dev);
+	slave_port->rmnet_mode = RMNET_EPMODE_BRIDGE;
+	slave_port->bridge_ep = real_dev;
+
+	port->rmnet_mode = RMNET_EPMODE_BRIDGE;
+	port->bridge_ep = slave_dev;
+
+	netdev_dbg(slave_dev, "registered with rmnet as slave\n");
+	return 0;
+}
+
+int rmnet_del_bridge(struct net_device *rmnet_dev,
+		     struct net_device *slave_dev)
+{
+	struct rmnet_priv *priv = netdev_priv(rmnet_dev);
+	struct net_device *real_dev = priv->real_dev;
+	struct rmnet_port *port, *slave_port;
+
+	port = rmnet_get_port(real_dev);
+	port->rmnet_mode = RMNET_EPMODE_VND;
+	port->bridge_ep = NULL;
+
+	netdev_upper_dev_unlink(slave_dev, rmnet_dev);
+	slave_port = rmnet_get_port(slave_dev);
+	rmnet_unregister_real_device(slave_dev, slave_port);
+
+	netdev_dbg(slave_dev, "removed from rmnet as slave\n");
+	return 0;
+}
+
 /* Startup/Shutdown */
 
 static int __init rmnet_init(void)

drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h

@@ -20,13 +20,10 @@
 
 #define RMNET_MAX_LOGICAL_EP 255
 
-/* Information about the next device to deliver the packet to.
- * Exact usage of this parameter depends on the rmnet_mode.
- */
 struct rmnet_endpoint {
-	u8 rmnet_mode;
 	u8 mux_id;
 	struct net_device *egress_dev;
+	struct hlist_node hlnode;
 };
 
 /* One instance of this structure is instantiated for each real_dev associated
@@ -34,22 +31,26 @@ struct rmnet_endpoint {
  */
 struct rmnet_port {
 	struct net_device *dev;
-	struct rmnet_endpoint local_ep;
-	struct rmnet_endpoint muxed_ep[RMNET_MAX_LOGICAL_EP];
 	u32 ingress_data_format;
 	u32 egress_data_format;
-	struct net_device *rmnet_devices[RMNET_MAX_LOGICAL_EP];
 	u8 nr_rmnet_devs;
+	u8 rmnet_mode;
+	struct hlist_head muxed_ep[RMNET_MAX_LOGICAL_EP];
+	struct net_device *bridge_ep;
 };
 
 extern struct rtnl_link_ops rmnet_link_ops;
 
 struct rmnet_priv {
-	struct rmnet_endpoint local_ep;
 	u8 mux_id;
 	struct net_device *real_dev;
 };
 
 struct rmnet_port *rmnet_get_port(struct net_device *real_dev);
-
+struct rmnet_endpoint *rmnet_get_endpoint(struct rmnet_port *port, u8 mux_id);
+int rmnet_add_bridge(struct net_device *rmnet_dev,
+		     struct net_device *slave_dev,
+		     struct netlink_ext_ack *extack);
+int rmnet_del_bridge(struct net_device *rmnet_dev,
+		     struct net_device *slave_dev);
 #endif /* _RMNET_CONFIG_H_ */

drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c

@@ -44,27 +44,8 @@ static void rmnet_set_skb_proto(struct sk_buff *skb)
 /* Generic handler */
 
 static rx_handler_result_t
-rmnet_bridge_handler(struct sk_buff *skb, struct rmnet_endpoint *ep)
+rmnet_deliver_skb(struct sk_buff *skb)
 {
-	if (!ep->egress_dev)
-		kfree_skb(skb);
-	else
-		rmnet_egress_handler(skb, ep);
-
-	return RX_HANDLER_CONSUMED;
-}
-
-static rx_handler_result_t
-rmnet_deliver_skb(struct sk_buff *skb, struct rmnet_endpoint *ep)
-{
-	switch (ep->rmnet_mode) {
-	case RMNET_EPMODE_NONE:
-		return RX_HANDLER_PASS;
-
-	case RMNET_EPMODE_BRIDGE:
-		return rmnet_bridge_handler(skb, ep);
-
-	case RMNET_EPMODE_VND:
 	skb_reset_transport_header(skb);
 	skb_reset_network_header(skb);
 	rmnet_vnd_rx_fixup(skb, skb->dev);
@@ -73,25 +54,6 @@ rmnet_deliver_skb(struct sk_buff *skb, struct rmnet_endpoint *ep)
 	skb_set_mac_header(skb, 0);
 	netif_receive_skb(skb);
 	return RX_HANDLER_CONSUMED;
-
-	default:
-		kfree_skb(skb);
-		return RX_HANDLER_CONSUMED;
-	}
-}
-
-static rx_handler_result_t
-rmnet_ingress_deliver_packet(struct sk_buff *skb,
-			     struct rmnet_port *port)
-{
-	if (!port) {
-		kfree_skb(skb);
-		return RX_HANDLER_CONSUMED;
-	}
-
-	skb->dev = port->local_ep.egress_dev;
-
-	return rmnet_deliver_skb(skb, &port->local_ep);
 }
 
 /* MAP handler */
@@ -109,19 +71,18 @@ __rmnet_map_ingress_handler(struct sk_buff *skb,
 		    & RMNET_INGRESS_FORMAT_MAP_COMMANDS)
 			return rmnet_map_command(skb, port);
 
-		kfree_skb(skb);
-		return RX_HANDLER_CONSUMED;
+		goto free_skb;
 	}
 
 	mux_id = RMNET_MAP_GET_MUX_ID(skb);
 	len = RMNET_MAP_GET_LENGTH(skb) - RMNET_MAP_GET_PAD(skb);
 
-	if (mux_id >= RMNET_MAX_LOGICAL_EP) {
-		kfree_skb(skb);
-		return RX_HANDLER_CONSUMED;
-	}
+	if (mux_id >= RMNET_MAX_LOGICAL_EP)
+		goto free_skb;
 
-	ep = &port->muxed_ep[mux_id];
+	ep = rmnet_get_endpoint(port, mux_id);
+	if (!ep)
+		goto free_skb;
 
 	if (port->ingress_data_format & RMNET_INGRESS_FORMAT_DEMUXING)
 		skb->dev = ep->egress_dev;
@@ -130,7 +91,11 @@ __rmnet_map_ingress_handler(struct sk_buff *skb,
 	skb_pull(skb, sizeof(struct rmnet_map_header));
 	skb_trim(skb, len);
 	rmnet_set_skb_proto(skb);
-	return rmnet_deliver_skb(skb, ep);
+	return rmnet_deliver_skb(skb);
+
+free_skb:
+	kfree_skb(skb);
+	return RX_HANDLER_CONSUMED;
 }
 
 static rx_handler_result_t
@@ -154,8 +119,7 @@ rmnet_map_ingress_handler(struct sk_buff *skb,
 }
 
 static int rmnet_map_egress_handler(struct sk_buff *skb,
-				    struct rmnet_port *port,
-				    struct rmnet_endpoint *ep,
+				    struct rmnet_port *port, u8 mux_id,
 				    struct net_device *orig_dev)
 {
 	int required_headroom, additional_header_len;
@@ -174,10 +138,10 @@ static int rmnet_map_egress_handler(struct sk_buff *skb,
 		return RMNET_MAP_CONSUMED;
 
 	if (port->egress_data_format & RMNET_EGRESS_FORMAT_MUXING) {
-		if (ep->mux_id == 0xff)
+		if (mux_id == 0xff)
 			map_header->mux_id = 0;
 		else
-			map_header->mux_id = ep->mux_id;
+			map_header->mux_id = mux_id;
 	}
 
 	skb->protocol = htons(ETH_P_MAP);
@@ -185,6 +149,17 @@ static int rmnet_map_egress_handler(struct sk_buff *skb,
 	return RMNET_MAP_SUCCESS;
 }
 
+static rx_handler_result_t
+rmnet_bridge_handler(struct sk_buff *skb, struct net_device *bridge_dev)
+{
+	if (bridge_dev) {
+		skb->dev = bridge_dev;
+		dev_queue_xmit(skb);
+	}
+
+	return RX_HANDLER_CONSUMED;
+}
+
 /* Ingress / Egress Entry Points */
 
 /* Processes packet as per ingress data format for receiving device. Logical
@@ -193,10 +168,10 @@ static int rmnet_map_egress_handler(struct sk_buff *skb,
  */
 rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb)
 {
-	struct rmnet_port *port;
+	int rc = RX_HANDLER_CONSUMED;
 	struct sk_buff *skb = *pskb;
+	struct rmnet_port *port;
 	struct net_device *dev;
-	int rc;
 
 	if (!skb)
 		return RX_HANDLER_CONSUMED;
@@ -204,28 +179,14 @@ rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb)
 	dev = skb->dev;
 	port = rmnet_get_port(dev);
 
-	if (port->ingress_data_format & RMNET_INGRESS_FORMAT_MAP) {
+	switch (port->rmnet_mode) {
+	case RMNET_EPMODE_VND:
+		if (port->ingress_data_format & RMNET_INGRESS_FORMAT_MAP)
 			rc = rmnet_map_ingress_handler(skb, port);
-	} else {
-		switch (ntohs(skb->protocol)) {
-		case ETH_P_MAP:
-			if (port->local_ep.rmnet_mode ==
-				RMNET_EPMODE_BRIDGE) {
-				rc = rmnet_ingress_deliver_packet(skb, port);
-			} else {
-				kfree_skb(skb);
-				rc = RX_HANDLER_CONSUMED;
-			}
 		break;
-
-		case ETH_P_IP:
-		case ETH_P_IPV6:
-			rc = rmnet_ingress_deliver_packet(skb, port);
+	case RMNET_EPMODE_BRIDGE:
+		rc = rmnet_bridge_handler(skb, port->bridge_ep);
 		break;
-
-		default:
-			rc = RX_HANDLER_PASS;
-		}
 	}
 
 	return rc;
@@ -235,14 +196,17 @@ rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb)
  * for egress device configured in logical endpoint. Packet is then transmitted
  * on the egress device.
  */
-void rmnet_egress_handler(struct sk_buff *skb,
-			  struct rmnet_endpoint *ep)
+void rmnet_egress_handler(struct sk_buff *skb)
 {
 	struct net_device *orig_dev;
 	struct rmnet_port *port;
+	struct rmnet_priv *priv;
+	u8 mux_id;
 
 	orig_dev = skb->dev;
-	skb->dev = ep->egress_dev;
+	priv = netdev_priv(orig_dev);
+	skb->dev = priv->real_dev;
+	mux_id = priv->mux_id;
 
 	port = rmnet_get_port(skb->dev);
 	if (!port) {
@@ -251,7 +215,7 @@ void rmnet_egress_handler(struct sk_buff *skb,
 	}
 
 	if (port->egress_data_format & RMNET_EGRESS_FORMAT_MAP) {
-		switch (rmnet_map_egress_handler(skb, port, ep, orig_dev)) {
+		switch (rmnet_map_egress_handler(skb, port, mux_id, orig_dev)) {
 		case RMNET_MAP_CONSUMED:
 			return;
 
@@ -264,7 +228,6 @@ void rmnet_egress_handler(struct sk_buff *skb,
 		}
 	}
 
-	if (ep->rmnet_mode == RMNET_EPMODE_VND)
 	rmnet_vnd_tx_fixup(skb, orig_dev);
 
 	dev_queue_xmit(skb);

drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.h

@@ -18,8 +18,7 @@
 
 #include "rmnet_config.h"
 
-void rmnet_egress_handler(struct sk_buff *skb,
-			  struct rmnet_endpoint *ep);
+void rmnet_egress_handler(struct sk_buff *skb);
 
 rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb);
 

drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c

@@ -17,7 +17,7 @@
 #include "rmnet_vnd.h"
 
 static u8 rmnet_map_do_flow_control(struct sk_buff *skb,
-				    struct rmnet_port *rdinfo,
+				    struct rmnet_port *port,
 				    int enable)
 {
 	struct rmnet_map_control_command *cmd;
@@ -37,7 +37,7 @@ static u8 rmnet_map_do_flow_control(struct sk_buff *skb,
 		return RX_HANDLER_CONSUMED;
 	}
 
-	ep = &rdinfo->muxed_ep[mux_id];
+	ep = rmnet_get_endpoint(port, mux_id);
 	vnd = ep->egress_dev;
 
 	ip_family = cmd->flow_control.ip_family;

drivers/net/ethernet/qualcomm/rmnet/rmnet_private.h

@@ -19,23 +19,15 @@
 #define RMNET_TX_QUEUE_LEN         1000
 
 /* Constants */
-#define RMNET_EGRESS_FORMAT__RESERVED__         BIT(0)
 #define RMNET_EGRESS_FORMAT_MAP                 BIT(1)
 #define RMNET_EGRESS_FORMAT_AGGREGATION         BIT(2)
 #define RMNET_EGRESS_FORMAT_MUXING              BIT(3)
-#define RMNET_EGRESS_FORMAT_MAP_CKSUMV3         BIT(4)
-#define RMNET_EGRESS_FORMAT_MAP_CKSUMV4         BIT(5)
 
-#define RMNET_INGRESS_FIX_ETHERNET              BIT(0)
 #define RMNET_INGRESS_FORMAT_MAP                BIT(1)
 #define RMNET_INGRESS_FORMAT_DEAGGREGATION      BIT(2)
 #define RMNET_INGRESS_FORMAT_DEMUXING           BIT(3)
 #define RMNET_INGRESS_FORMAT_MAP_COMMANDS       BIT(4)
-#define RMNET_INGRESS_FORMAT_MAP_CKSUMV3        BIT(5)
-#define RMNET_INGRESS_FORMAT_MAP_CKSUMV4        BIT(6)
 
-/* Pass the frame up the stack with no modifications to skb->dev */
-#define RMNET_EPMODE_NONE (0)
 /* Replace skb->dev to a virtual rmnet device and pass up the stack */
 #define RMNET_EPMODE_VND (1)
 /* Pass the frame directly to another device with dev_queue_xmit() */

drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c

@@ -45,8 +45,8 @@ static netdev_tx_t rmnet_vnd_start_xmit(struct sk_buff *skb,
 	struct rmnet_priv *priv;
 
 	priv = netdev_priv(dev);
-	if (priv->local_ep.egress_dev) {
-		rmnet_egress_handler(skb, &priv->local_ep);
+	if (priv->real_dev) {
+		rmnet_egress_handler(skb);
 	} else {
 		dev->stats.tx_dropped++;
 		kfree_skb(skb);
@@ -74,6 +74,8 @@ static const struct net_device_ops rmnet_vnd_ops = {
 	.ndo_start_xmit = rmnet_vnd_start_xmit,
 	.ndo_change_mtu = rmnet_vnd_change_mtu,
 	.ndo_get_iflink = rmnet_vnd_get_iflink,
+	.ndo_add_slave  = rmnet_add_bridge,
+	.ndo_del_slave  = rmnet_del_bridge,
 };
 
 /* Called by kernel whenever a new rmnet<n> device is created. Sets MTU,
@@ -100,17 +102,19 @@ void rmnet_vnd_setup(struct net_device *rmnet_dev)
 
 int rmnet_vnd_newlink(u8 id, struct net_device *rmnet_dev,
 		      struct rmnet_port *port,
-		      struct net_device *real_dev)
+		      struct net_device *real_dev,
+		      struct rmnet_endpoint *ep)
 {
 	struct rmnet_priv *priv;
 	int rc;
 
-	if (port->rmnet_devices[id])
+	if (ep->egress_dev)
 		return -EINVAL;
 
 	rc = register_netdevice(rmnet_dev);
 	if (!rc) {
-		port->rmnet_devices[id] = rmnet_dev;
+		ep->egress_dev = rmnet_dev;
+		ep->mux_id = id;
 		port->nr_rmnet_devs++;
 
 		rmnet_dev->rtnl_link_ops = &rmnet_link_ops;
@@ -125,12 +129,13 @@ int rmnet_vnd_newlink(u8 id, struct net_device *rmnet_dev,
 	return rc;
 }
 
-int rmnet_vnd_dellink(u8 id, struct rmnet_port *port)
+int rmnet_vnd_dellink(u8 id, struct rmnet_port *port,
+		      struct rmnet_endpoint *ep)
 {
-	if (id >= RMNET_MAX_LOGICAL_EP || !port->rmnet_devices[id])
+	if (id >= RMNET_MAX_LOGICAL_EP || !ep->egress_dev)
 		return -EINVAL;
 
-	port->rmnet_devices[id] = NULL;
+	ep->egress_dev = NULL;
 	port->nr_rmnet_devs--;
 	return 0;
 }
@@ -143,21 +148,6 @@ u8 rmnet_vnd_get_mux(struct net_device *rmnet_dev)
 	return priv->mux_id;
 }
 
-/* Gets the logical endpoint configuration for a RmNet virtual network device
- * node. Caller should confirm that devices is a RmNet VND before calling.
- */
-struct rmnet_endpoint *rmnet_vnd_get_endpoint(struct net_device *rmnet_dev)
-{
-	struct rmnet_priv *priv;
-
-	if (!rmnet_dev)
-		return NULL;
-
-	priv = netdev_priv(rmnet_dev);
-
-	return &priv->local_ep;
-}
-
 int rmnet_vnd_do_flow_control(struct net_device *rmnet_dev, int enable)
 {
 	netdev_dbg(rmnet_dev, "Setting VND TX queue state to %d\n", enable);

drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.h

@@ -17,11 +17,12 @@
 #define _RMNET_VND_H_
 
 int rmnet_vnd_do_flow_control(struct net_device *dev, int enable);
-struct rmnet_endpoint *rmnet_vnd_get_endpoint(struct net_device *dev);
 int rmnet_vnd_newlink(u8 id, struct net_device *rmnet_dev,
 		      struct rmnet_port *port,
-		      struct net_device *real_dev);
-int rmnet_vnd_dellink(u8 id, struct rmnet_port *port);
+		      struct net_device *real_dev,
+		      struct rmnet_endpoint *ep);
+int rmnet_vnd_dellink(u8 id, struct rmnet_port *port,
+		      struct rmnet_endpoint *ep);
 void rmnet_vnd_rx_fixup(struct sk_buff *skb, struct net_device *dev);
 void rmnet_vnd_tx_fixup(struct sk_buff *skb, struct net_device *dev);
 u8 rmnet_vnd_get_mux(struct net_device *rmnet_dev);