efa5356b0d
This patch adds support to attach per vlan tunnel info dst
metadata. This enables bridge driver to map vlan to tunnel_info
at ingress and egress. It uses the kernel dst_metadata infrastructure.
The initial use case is vlan to vni bridging, but the api is generic
to extend to any tunnel_info in the future:
- Uapi to configure/unconfigure/dump per vlan tunnel data
- netlink functions to configure vlan and tunnel_info mapping
- Introduces bridge port flag BR_LWT_VLAN to enable attach/detach
dst_metadata to bridged packets on ports. off by default.
- changes to existing code is mainly refactor some existing vlan
handling netlink code + hooks for new vlan tunnel code
- I have kept the vlan tunnel code isolated in separate files.
- most of the netlink vlan tunnel code is handling of vlan-tunid
ranges (follows the vlan range handling code). To conserve space
vlan-tunid by default are always dumped in ranges if applicable.
Use case:
example use for this is a vxlan bridging gateway or vtep
which maps vlans to vn-segments (or vnis).
iproute2 example (patched and pruned iproute2 output to just show
relevant fdb entries):
example shows same host mac learnt on two vni's and
vlan 100 maps to vni 1000, vlan 101 maps to vni 1001
before (netdev per vni):
$bridge fdb show | grep "00:02:00:00:00:03"
00:02:00:00:00:03 dev vxlan1001 vlan 101 master bridge
00:02:00:00:00:03 dev vxlan1001 dst 12.0.0.8 self
00:02:00:00:00:03 dev vxlan1000 vlan 100 master bridge
00:02:00:00:00:03 dev vxlan1000 dst 12.0.0.8 self
after this patch with collect metdata in bridged mode (single netdev):
$bridge fdb show | grep "00:02:00:00:00:03"
00:02:00:00:00:03 dev vxlan0 vlan 101 master bridge
00:02:00:00:00:03 dev vxlan0 src_vni 1001 dst 12.0.0.8 self
00:02:00:00:00:03 dev vxlan0 vlan 100 master bridge
00:02:00:00:00:03 dev vxlan0 src_vni 1000 dst 12.0.0.8 self
CC: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
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* Bridge per vlan tunnels
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*
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* Authors:
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* Roopa Prabhu <roopa@cumulusnetworks.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _BR_PRIVATE_TUNNEL_H
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#define _BR_PRIVATE_TUNNEL_H
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struct vtunnel_info {
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u32 tunid;
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u16 vid;
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u16 flags;
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};
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/* br_netlink_tunnel.c */
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int br_parse_vlan_tunnel_info(struct nlattr *attr,
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struct vtunnel_info *tinfo);
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int br_process_vlan_tunnel_info(struct net_bridge *br,
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struct net_bridge_port *p,
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int cmd,
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struct vtunnel_info *tinfo_curr,
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struct vtunnel_info *tinfo_last);
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int br_get_vlan_tunnel_info_size(struct net_bridge_vlan_group *vg);
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int br_fill_vlan_tunnel_info(struct sk_buff *skb,
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struct net_bridge_vlan_group *vg);
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#ifdef CONFIG_BRIDGE_VLAN_FILTERING
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/* br_vlan_tunnel.c */
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int vlan_tunnel_init(struct net_bridge_vlan_group *vg);
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void vlan_tunnel_deinit(struct net_bridge_vlan_group *vg);
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int nbp_vlan_tunnel_info_delete(struct net_bridge_port *port, u16 vid);
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int nbp_vlan_tunnel_info_add(struct net_bridge_port *port, u16 vid, u32 tun_id);
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void nbp_vlan_tunnel_info_flush(struct net_bridge_port *port);
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void vlan_tunnel_info_del(struct net_bridge_vlan_group *vg,
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struct net_bridge_vlan *vlan);
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#else
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static inline int vlan_tunnel_init(struct net_bridge_vlan_group *vg)
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{
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return 0;
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}
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static inline int nbp_vlan_tunnel_info_delete(struct net_bridge_port *port,
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u16 vid)
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{
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return 0;
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}
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static inline int nbp_vlan_tunnel_info_add(struct net_bridge_port *port,
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u16 vid, u32 tun_id)
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{
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return 0;
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}
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static inline void nbp_vlan_tunnel_info_flush(struct net_bridge_port *port)
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{
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}
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static inline void vlan_tunnel_info_del(struct net_bridge_vlan_group *vg,
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struct net_bridge_vlan *vlan)
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{
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}
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#endif
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#endif
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