2 * Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/rculist.h>
18 #include <linux/notifier.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/if_link.h>
23 #include <linux/if_vlan.h>
25 #include <linux/inetdevice.h>
26 #include <linux/netfilter.h>
28 #include <net/ip6_route.h>
29 #include <net/netns/generic.h>
30 #include <net/rtnetlink.h>
31 #include <net/route.h>
32 #include <net/addrconf.h>
33 #include <net/l3mdev.h>
35 #define IPVLAN_DRV "ipvlan"
36 #define IPV_DRV_VER "0.1"
38 #define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
39 #define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1)
41 #define IPVLAN_MAC_FILTER_BITS 8
42 #define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS)
43 #define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1)
45 #define IPVLAN_QBACKLOG_LIMIT 1000
54 struct ipvl_pcpu_stats {
60 struct u64_stats_sync syncp;
68 struct net_device *dev;
69 struct list_head pnode;
70 struct ipvl_port *port;
71 struct net_device *phy_dev;
72 struct list_head addrs;
73 struct ipvl_pcpu_stats __percpu *pcpu_stats;
74 DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
75 netdev_features_t sfeatures;
80 struct ipvl_dev *master; /* Back pointer to master */
82 struct in6_addr ip6; /* IPv6 address on logical interface */
83 struct in_addr ip4; /* IPv4 address on logical interface */
85 #define ip6addr ipu.ip6
86 #define ip4addr ipu.ip4
87 struct hlist_node hlnode; /* Hash-table linkage */
88 struct list_head anode; /* logical-interface linkage */
94 struct net_device *dev;
96 struct hlist_head hlhead[IPVLAN_HASH_SIZE];
97 struct list_head ipvlans;
100 struct work_struct wq;
101 struct sk_buff_head backlog;
109 #define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))
111 static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
113 return rcu_dereference(d->rx_handler_data);
116 static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d)
118 return rcu_dereference_bh(d->rx_handler_data);
121 static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
123 return rtnl_dereference(d->rx_handler_data);
126 void ipvlan_init_secret(void);
127 unsigned int ipvlan_mac_hash(const unsigned char *addr);
128 rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
129 void ipvlan_process_multicast(struct work_struct *work);
130 int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
131 void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
132 struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
133 const void *iaddr, bool is_v6);
134 bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
135 void ipvlan_ht_addr_del(struct ipvl_addr *addr);
136 struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
138 unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb,
139 const struct nf_hook_state *state);
140 void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
141 unsigned int len, bool success, bool mcast);
142 int ipvlan_link_new(struct net *src_net, struct net_device *dev,
143 struct nlattr *tb[], struct nlattr *data[]);
144 void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
145 void ipvlan_link_setup(struct net_device *dev);
146 int ipvlan_link_register(struct rtnl_link_ops *ops);
147 #endif /* __IPVLAN_H */