1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
8 #include <linux/kernel.h>
9 #include <linux/types.h>
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/rculist.h>
13 #include <linux/notifier.h>
14 #include <linux/netdevice.h>
15 #include <linux/etherdevice.h>
16 #include <linux/if_arp.h>
17 #include <linux/if_link.h>
18 #include <linux/if_vlan.h>
20 #include <linux/inetdevice.h>
21 #include <linux/netfilter.h>
23 #include <net/ip6_route.h>
24 #include <net/netns/generic.h>
25 #include <net/rtnetlink.h>
26 #include <net/route.h>
27 #include <net/addrconf.h>
28 #include <net/l3mdev.h>
30 #define IPVLAN_DRV "ipvlan"
31 #define IPV_DRV_VER "0.1"
33 #define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
34 #define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1)
36 #define IPVLAN_MAC_FILTER_BITS 8
37 #define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS)
38 #define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1)
40 #define IPVLAN_QBACKLOG_LIMIT 1000
49 struct ipvl_pcpu_stats {
55 struct u64_stats_sync syncp;
63 struct net_device *dev;
64 struct list_head pnode;
65 struct ipvl_port *port;
66 struct net_device *phy_dev;
67 struct list_head addrs;
68 struct ipvl_pcpu_stats __percpu *pcpu_stats;
69 DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
70 netdev_features_t sfeatures;
72 spinlock_t addrs_lock;
76 struct ipvl_dev *master; /* Back pointer to master */
78 struct in6_addr ip6; /* IPv6 address on logical interface */
79 struct in_addr ip4; /* IPv4 address on logical interface */
81 #define ip6addr ipu.ip6
82 #define ip4addr ipu.ip4
83 struct hlist_node hlnode; /* Hash-table linkage */
84 struct list_head anode; /* logical-interface linkage */
90 struct net_device *dev;
92 struct hlist_head hlhead[IPVLAN_HASH_SIZE];
93 struct list_head ipvlans;
97 struct work_struct wq;
98 struct sk_buff_head backlog;
106 #define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))
108 static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
110 return rcu_dereference(d->rx_handler_data);
113 static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d)
115 return rcu_dereference_bh(d->rx_handler_data);
118 static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
120 return rtnl_dereference(d->rx_handler_data);
123 static inline bool ipvlan_is_private(const struct ipvl_port *port)
125 return !!(port->flags & IPVLAN_F_PRIVATE);
128 static inline void ipvlan_mark_private(struct ipvl_port *port)
130 port->flags |= IPVLAN_F_PRIVATE;
133 static inline void ipvlan_clear_private(struct ipvl_port *port)
135 port->flags &= ~IPVLAN_F_PRIVATE;
138 static inline bool ipvlan_is_vepa(const struct ipvl_port *port)
140 return !!(port->flags & IPVLAN_F_VEPA);
143 static inline void ipvlan_mark_vepa(struct ipvl_port *port)
145 port->flags |= IPVLAN_F_VEPA;
148 static inline void ipvlan_clear_vepa(struct ipvl_port *port)
150 port->flags &= ~IPVLAN_F_VEPA;
153 void ipvlan_init_secret(void);
154 unsigned int ipvlan_mac_hash(const unsigned char *addr);
155 rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
156 void ipvlan_process_multicast(struct work_struct *work);
157 int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
158 void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
159 struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
160 const void *iaddr, bool is_v6);
161 bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
162 void ipvlan_ht_addr_del(struct ipvl_addr *addr);
163 struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port, void *lyr3h,
164 int addr_type, bool use_dest);
165 void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type);
166 void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
167 unsigned int len, bool success, bool mcast);
168 int ipvlan_link_new(struct net *src_net, struct net_device *dev,
169 struct nlattr *tb[], struct nlattr *data[],
170 struct netlink_ext_ack *extack);
171 void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
172 void ipvlan_link_setup(struct net_device *dev);
173 int ipvlan_link_register(struct rtnl_link_ops *ops);
174 #ifdef CONFIG_IPVLAN_L3S
175 int ipvlan_l3s_register(struct ipvl_port *port);
176 void ipvlan_l3s_unregister(struct ipvl_port *port);
177 void ipvlan_migrate_l3s_hook(struct net *oldnet, struct net *newnet);
178 int ipvlan_l3s_init(void);
179 void ipvlan_l3s_cleanup(void);
181 static inline int ipvlan_l3s_register(struct ipvl_port *port)
186 static inline void ipvlan_l3s_unregister(struct ipvl_port *port)
190 static inline void ipvlan_migrate_l3s_hook(struct net *oldnet,
195 static inline int ipvlan_l3s_init(void)
200 static inline void ipvlan_l3s_cleanup(void)
203 #endif /* CONFIG_IPVLAN_L3S */
205 static inline bool netif_is_ipvlan_port(const struct net_device *dev)
207 return rcu_access_pointer(dev->rx_handler) == ipvlan_handle_frame;
210 #endif /* __IPVLAN_H */