linux-stable/net/bridge/br_private_tunnel.h
Nikolay Aleksandrov 569da08228 net: bridge: vlan options: add support for tunnel mapping set/del
This patch adds support for manipulating vlan/tunnel mappings. The
tunnel ids are globally unique and are one per-vlan. There were two
trickier issues - first in order to support vlan ranges we have to
compute the current tunnel id in the following way:
 - base tunnel id (attr) + current vlan id - starting vlan id
This is in line how the old API does vlan/tunnel mapping with ranges. We
already have the vlan range present, so it's redundant to add another
attribute for the tunnel range end. It's simply base tunnel id + vlan
range. And second to support removing mappings we need an out-of-band way
to tell the option manipulating function because there are no
special/reserved tunnel id values, so we use a vlan flag to denote the
operation is tunnel mapping removal.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-17 22:47:12 -07:00

85 lines
2.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Bridge per vlan tunnels
*
* Authors:
* Roopa Prabhu <roopa@cumulusnetworks.com>
*/
#ifndef _BR_PRIVATE_TUNNEL_H
#define _BR_PRIVATE_TUNNEL_H
struct vtunnel_info {
u32 tunid;
u16 vid;
u16 flags;
};
/* br_netlink_tunnel.c */
int br_parse_vlan_tunnel_info(struct nlattr *attr,
struct vtunnel_info *tinfo);
int br_process_vlan_tunnel_info(const struct net_bridge *br,
const struct net_bridge_port *p,
int cmd,
struct vtunnel_info *tinfo_curr,
struct vtunnel_info *tinfo_last,
bool *changed);
int br_get_vlan_tunnel_info_size(struct net_bridge_vlan_group *vg);
int br_fill_vlan_tunnel_info(struct sk_buff *skb,
struct net_bridge_vlan_group *vg);
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
/* br_vlan_tunnel.c */
int vlan_tunnel_init(struct net_bridge_vlan_group *vg);
void vlan_tunnel_deinit(struct net_bridge_vlan_group *vg);
int nbp_vlan_tunnel_info_delete(const struct net_bridge_port *port, u16 vid);
int nbp_vlan_tunnel_info_add(const 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);
bool vlan_tunid_inrange(const struct net_bridge_vlan *v_curr,
const struct net_bridge_vlan *v_last);
int br_vlan_tunnel_info(const struct net_bridge_port *p, int cmd,
u16 vid, u32 tun_id, bool *changed);
#else
static inline int vlan_tunnel_init(struct net_bridge_vlan_group *vg)
{
return 0;
}
static inline int nbp_vlan_tunnel_info_delete(const struct net_bridge_port *port,
u16 vid)
{
return 0;
}
static inline int nbp_vlan_tunnel_info_add(const struct net_bridge_port *port,
u16 vid, u32 tun_id)
{
return 0;
}
static inline void nbp_vlan_tunnel_info_flush(struct net_bridge_port *port)
{
}
static inline void vlan_tunnel_info_del(struct net_bridge_vlan_group *vg,
struct net_bridge_vlan *vlan)
{
}
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