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Commit 552406c4 authored by Vlad Yasevich's avatar Vlad Yasevich Committed by David S. Miller
Browse files

bridge: Add the ability to configure pvid 



A user may designate a certain vlan as PVID.  This means that
any ingress frame that does not contain a vlan tag is assigned to
this vlan and any forwarding decisions are made with this vlan in mind.

Signed-off-by: default avatarVlad Yasevich <vyasevic@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 78851988

include/uapi/linux/if_bridge.h

+1 −0
Original line number Diff line number Diff line
@@ -120,6 +120,7 @@ enum { 
#define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1)



#define BRIDGE_VLAN_INFO_MASTER	(1<<0)	/* Operate on Bridge device as well */

#define BRIDGE_VLAN_INFO_PVID	(1<<1)	/* VLAN is PVID, ingress untagged */



struct bridge_vlan_info {

	u16 flags;

net/bridge/br_netlink.c

+8 −3
Original line number Diff line number Diff line
@@ -120,6 +120,7 @@ static int br_fill_ifinfo(struct sk_buff *skb, 
		const struct net_port_vlans *pv;

		struct bridge_vlan_info vinfo;

		u16 vid;

		u16 pvid;



		if (port)

			pv = nbp_get_vlan_info(port);
@@ -133,12 +134,15 @@ static int br_fill_ifinfo(struct sk_buff *skb, 
		if (!af)

			goto nla_put_failure;



		pvid = br_get_pvid(pv);

		for (vid = find_first_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN);

		     vid < BR_VLAN_BITMAP_LEN;

		     vid = find_next_bit(pv->vlan_bitmap,

					 BR_VLAN_BITMAP_LEN, vid+1)) {

			vinfo.vid = vid;

			vinfo.flags = 0;

			if (vid == pvid)

				vinfo.flags |= BRIDGE_VLAN_INFO_PVID;

			if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,

				    sizeof(vinfo), &vinfo))

				goto nla_put_failure;
@@ -239,14 +243,15 @@ static int br_afspec(struct net_bridge *br, 
		switch (cmd) {

		case RTM_SETLINK:

			if (p) {

				err = nbp_vlan_add(p, vinfo->vid);

				err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);

				if (err)

					break;



				if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)

					err = br_vlan_add(p->br, vinfo->vid);

					err = br_vlan_add(p->br, vinfo->vid,

							  vinfo->flags);

			} else

				err = br_vlan_add(br, vinfo->vid);

				err = br_vlan_add(br, vinfo->vid, vinfo->flags);



			if (err)

				break;

net/bridge/br_private.h

+4 −4
Original line number Diff line number Diff line
@@ -562,11 +562,11 @@ extern bool br_allowed_egress(struct net_bridge *br, 
extern struct sk_buff *br_handle_vlan(struct net_bridge *br,

				      const struct net_port_vlans *v,

				      struct sk_buff *skb);

extern int br_vlan_add(struct net_bridge *br, u16 vid);

extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);

extern int br_vlan_delete(struct net_bridge *br, u16 vid);

extern void br_vlan_flush(struct net_bridge *br);

extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);

extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid);

extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);

extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);

extern void nbp_vlan_flush(struct net_bridge_port *port);
@@ -633,7 +633,7 @@ static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 
	return skb;

}



static inline int br_vlan_add(struct net_bridge *br, u16 vid)

static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)

{

	return -EOPNOTSUPP;

}
@@ -647,7 +647,7 @@ static inline void br_vlan_flush(struct net_bridge *br) 
{

}



static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid)

static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)

{

	return -EOPNOTSUPP;

}

net/bridge/br_vlan.c

+37 −10
Original line number Diff line number Diff line
@@ -5,12 +5,33 @@ 


#include "br_private.h"



static int __vlan_add(struct net_port_vlans *v, u16 vid)

static void __vlan_add_pvid(struct net_port_vlans *v, u16 vid)

{

	if (v->pvid == vid)

		return;



	smp_wmb();

	v->pvid = vid;

}



static void __vlan_delete_pvid(struct net_port_vlans *v, u16 vid)

{

	if (v->pvid != vid)

		return;



	smp_wmb();

	v->pvid = 0;

}



static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)

{

	int err;



	if (test_bit(vid, v->vlan_bitmap))

		return -EEXIST;

	if (test_bit(vid, v->vlan_bitmap)) {

		if (flags & BRIDGE_VLAN_INFO_PVID)

			__vlan_add_pvid(v, vid);

		return 0;

	}



	if (v->port_idx && vid) {

		struct net_device *dev = v->parent.port->dev;
@@ -29,6 +50,9 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid) 


	set_bit(vid, v->vlan_bitmap);

	v->num_vlans++;

	if (flags & BRIDGE_VLAN_INFO_PVID)

		__vlan_add_pvid(v, vid);



	return 0;

}
@@ -37,6 +61,8 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid) 
	if (!test_bit(vid, v->vlan_bitmap))

		return -EINVAL;



	__vlan_delete_pvid(v, vid);



	if (v->port_idx && vid) {

		struct net_device *dev = v->parent.port->dev;
@@ -58,6 +84,8 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid) 


static void __vlan_flush(struct net_port_vlans *v)

{

	smp_wmb();

	v->pvid = 0;

	bitmap_zero(v->vlan_bitmap, BR_VLAN_BITMAP_LEN);

	if (v->port_idx)

		rcu_assign_pointer(v->parent.port->vlan_info, NULL);
@@ -185,7 +213,7 @@ bool br_allowed_egress(struct net_bridge *br, 
}



/* Must be protected by RTNL */

int br_vlan_add(struct net_bridge *br, u16 vid)

int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)

{

	struct net_port_vlans *pv = NULL;

	int err;
@@ -194,7 +222,7 @@ int br_vlan_add(struct net_bridge *br, u16 vid) 


	pv = rtnl_dereference(br->vlan_info);

	if (pv)

		return __vlan_add(pv, vid);

		return __vlan_add(pv, vid, flags);



	/* Create port vlan infomration

	 */
@@ -203,7 +231,7 @@ int br_vlan_add(struct net_bridge *br, u16 vid) 
		return -ENOMEM;



	pv->parent.br = br;

	err = __vlan_add(pv, vid);

	err = __vlan_add(pv, vid, flags);

	if (err)

		goto out;
@@ -234,7 +262,6 @@ void br_vlan_flush(struct net_bridge *br) 
	struct net_port_vlans *pv;



	ASSERT_RTNL();



	pv = rtnl_dereference(br->vlan_info);

	if (!pv)

		return;
@@ -258,7 +285,7 @@ unlock: 
}



/* Must be protected by RTNL */

int nbp_vlan_add(struct net_bridge_port *port, u16 vid)

int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)

{

	struct net_port_vlans *pv = NULL;

	int err;
@@ -267,7 +294,7 @@ int nbp_vlan_add(struct net_bridge_port *port, u16 vid) 


	pv = rtnl_dereference(port->vlan_info);

	if (pv)

		return __vlan_add(pv, vid);

		return __vlan_add(pv, vid, flags);



	/* Create port vlan infomration

	 */
@@ -279,7 +306,7 @@ int nbp_vlan_add(struct net_bridge_port *port, u16 vid) 


	pv->port_idx = port->port_no;

	pv->parent.port = port;

	err = __vlan_add(pv, vid);

	err = __vlan_add(pv, vid, flags);

	if (err)

		goto clean_up;