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f01ec1c017
This patch allows to switch the netns when packet is encapsulated or decapsulated. The vxlan socket is openned into the i/o netns, ie into the netns where encapsulated packets are received. The socket lookup is done into this netns to find the corresponding vxlan tunnel. After decapsulation, the packet is injecting into the corresponding interface which may stand to another netns. When one of the two netns is removed, the tunnel is destroyed. Configuration example: ip netns add netns1 ip netns exec netns1 ip link set lo up ip link add vxlan10 type vxlan id 10 group 239.0.0.10 dev eth0 dstport 0 ip link set vxlan10 netns netns1 ip netns exec netns1 ip addr add 192.168.0.249/24 broadcast 192.168.0.255 dev vxlan10 ip netns exec netns1 ip link set vxlan10 up Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
#ifndef __NET_VXLAN_H
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#define __NET_VXLAN_H 1
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/udp.h>
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#define VNI_HASH_BITS 10
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#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
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struct vxlan_sock;
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typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key);
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/* per UDP socket information */
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struct vxlan_sock {
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struct hlist_node hlist;
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vxlan_rcv_t *rcv;
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void *data;
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struct work_struct del_work;
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struct socket *sock;
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struct rcu_head rcu;
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struct hlist_head vni_list[VNI_HASH_SIZE];
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atomic_t refcnt;
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struct udp_offload udp_offloads;
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};
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struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
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vxlan_rcv_t *rcv, void *data,
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bool no_share, bool ipv6);
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void vxlan_sock_release(struct vxlan_sock *vs);
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int vxlan_xmit_skb(struct vxlan_sock *vs,
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struct rtable *rt, struct sk_buff *skb,
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__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
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__be16 src_port, __be16 dst_port, __be32 vni, bool xnet);
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__be16 vxlan_src_port(__u16 port_min, __u16 port_max, struct sk_buff *skb);
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/* IP header + UDP + VXLAN + Ethernet header */
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#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
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/* IPv6 header + UDP + VXLAN + Ethernet header */
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#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
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#if IS_ENABLED(CONFIG_VXLAN)
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void vxlan_get_rx_port(struct net_device *netdev);
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#else
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static inline void vxlan_get_rx_port(struct net_device *netdev)
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{
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}
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#endif
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#endif
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