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Commit 11538d03 authored by Roopa Prabhu's avatar Roopa Prabhu Committed by David S. Miller
Browse files

bridge: vlan dst_metadata hooks in ingress and egress paths 



- ingress hook:
    - if port is a tunnel port, use tunnel info in
      attached dst_metadata to map it to a local vlan
- egress hook:
    - if port is a tunnel port, use tunnel info attached to
      vlan to set dst_metadata on the skb

CC: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: default avatarRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent efa5356b

net/bridge/br_forward.c

+1 −1
Original line number Diff line number Diff line
@@ -80,7 +80,7 @@ static void __br_forward(const struct net_bridge_port *to, 
	int br_hook;



	vg = nbp_vlan_group_rcu(to);

	skb = br_handle_vlan(to->br, vg, skb);

	skb = br_handle_vlan(to->br, to, vg, skb);

	if (!skb)

		return;

net/bridge/br_input.c

+7 −1
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/export.h>

#include <linux/rculist.h>

#include "br_private.h"

#include "br_private_tunnel.h"



/* Hook for brouter */

br_should_route_hook_t __rcu *br_should_route_hook __read_mostly;
@@ -57,7 +58,7 @@ static int br_pass_frame_up(struct sk_buff *skb) 


	indev = skb->dev;

	skb->dev = brdev;

	skb = br_handle_vlan(br, vg, skb);

	skb = br_handle_vlan(br, NULL, vg, skb);

	if (!skb)

		return NET_RX_DROP;

	/* update the multicast stats if the packet is IGMP/MLD */
@@ -261,6 +262,11 @@ rx_handler_result_t br_handle_frame(struct sk_buff **pskb) 
		return RX_HANDLER_CONSUMED;



	p = br_port_get_rcu(skb->dev);

	if (p->flags & BR_VLAN_TUNNEL) {

		if (br_handle_ingress_vlan_tunnel(skb, p,

						  nbp_vlan_group_rcu(p)))

			goto drop;

	}



	if (unlikely(is_link_local_ether_addr(dest))) {

		u16 fwd_mask = p->br->group_fwd_mask_required;

net/bridge/br_private.h

+2 −0
Original line number Diff line number Diff line
@@ -775,6 +775,7 @@ bool br_allowed_egress(struct net_bridge_vlan_group *vg, 
		       const struct sk_buff *skb);

bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);

struct sk_buff *br_handle_vlan(struct net_bridge *br,

			       const struct net_bridge_port *port,

			       struct net_bridge_vlan_group *vg,

			       struct sk_buff *skb);

int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
@@ -874,6 +875,7 @@ static inline bool br_should_learn(struct net_bridge_port *p, 
}



static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,

					     const struct net_bridge_port *port,

					     struct net_bridge_vlan_group *vg,

					     struct sk_buff *skb)

{

net/bridge/br_private_tunnel.h

+11 −0
Original line number Diff line number Diff line
@@ -40,6 +40,11 @@ int nbp_vlan_tunnel_info_add(struct net_bridge_port *port, u16 vid, u32 tun_id); 
void nbp_vlan_tunnel_info_flush(struct net_bridge_port *port);

void vlan_tunnel_info_del(struct net_bridge_vlan_group *vg,

			  struct net_bridge_vlan *vlan);

int br_handle_ingress_vlan_tunnel(struct sk_buff *skb,

				  struct net_bridge_port *p,

				  struct net_bridge_vlan_group *vg);

int br_handle_egress_vlan_tunnel(struct sk_buff *skb,

				 struct net_bridge_vlan *vlan);

#else

static inline int vlan_tunnel_init(struct net_bridge_vlan_group *vg)

{
@@ -67,6 +72,12 @@ static inline void vlan_tunnel_info_del(struct net_bridge_vlan_group *vg, 
{

}



static inline int br_handle_ingress_vlan_tunnel(struct sk_buff *skb,

						struct net_bridge_port *p,

						struct net_bridge_vlan_group *vg)

{

	return 0;

}

#endif



#endif

net/bridge/br_vlan.c

+7 −0
Original line number Diff line number Diff line
@@ -341,6 +341,7 @@ static void __vlan_flush(struct net_bridge_vlan_group *vg) 
}



struct sk_buff *br_handle_vlan(struct net_bridge *br,

			       const struct net_bridge_port *p,

			       struct net_bridge_vlan_group *vg,

			       struct sk_buff *skb)

{
@@ -381,6 +382,12 @@ struct sk_buff *br_handle_vlan(struct net_bridge *br, 


	if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)

		skb->vlan_tci = 0;



	if (p && (p->flags & BR_VLAN_TUNNEL) &&

	    br_handle_egress_vlan_tunnel(skb, v)) {

		kfree_skb(skb);

		return NULL;

	}

out:

	return skb;

}