1 /* 2 * Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com> 3 * 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. 8 * 9 */ 10 #ifndef __IPVLAN_H 11 #define __IPVLAN_H 12 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> 24 #include <linux/ip.h> 25 #include <linux/inetdevice.h> 26 #include <linux/netfilter.h> 27 #include <net/ip.h> 28 #include <net/ip6_route.h> 29 #include <net/rtnetlink.h> 30 #include <net/route.h> 31 #include <net/addrconf.h> 32 #include <net/l3mdev.h> 33 34 #define IPVLAN_DRV "ipvlan" 35 #define IPV_DRV_VER "0.1" 36 37 #define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE) 38 #define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1) 39 40 #define IPVLAN_MAC_FILTER_BITS 8 41 #define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS) 42 #define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1) 43 44 #define IPVLAN_QBACKLOG_LIMIT 1000 45 46 typedef enum { 47 IPVL_IPV6 = 0, 48 IPVL_ICMPV6, 49 IPVL_IPV4, 50 IPVL_ARP, 51 } ipvl_hdr_type; 52 53 struct ipvl_pcpu_stats { 54 u64 rx_pkts; 55 u64 rx_bytes; 56 u64 rx_mcast; 57 u64 tx_pkts; 58 u64 tx_bytes; 59 struct u64_stats_sync syncp; 60 u32 rx_errs; 61 u32 tx_drps; 62 }; 63 64 struct ipvl_port; 65 66 struct ipvl_dev { 67 struct net_device *dev; 68 struct list_head pnode; 69 struct ipvl_port *port; 70 struct net_device *phy_dev; 71 struct list_head addrs; 72 struct ipvl_pcpu_stats __percpu *pcpu_stats; 73 DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE); 74 netdev_features_t sfeatures; 75 u32 msg_enable; 76 u16 mtu_adj; 77 }; 78 79 struct ipvl_addr { 80 struct ipvl_dev *master; /* Back pointer to master */ 81 union { 82 struct in6_addr ip6; /* IPv6 address on logical interface */ 83 struct in_addr ip4; /* IPv4 address on logical interface */ 84 } ipu; 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 */ 89 ipvl_hdr_type atype; 90 struct rcu_head rcu; 91 }; 92 93 struct ipvl_port { 94 struct net_device *dev; 95 struct hlist_head hlhead[IPVLAN_HASH_SIZE]; 96 struct list_head ipvlans; 97 u16 mode; 98 struct work_struct wq; 99 struct sk_buff_head backlog; 100 int count; 101 struct rcu_head rcu; 102 }; 103 104 static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d) 105 { 106 return rcu_dereference(d->rx_handler_data); 107 } 108 109 static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d) 110 { 111 return rcu_dereference_bh(d->rx_handler_data); 112 } 113 114 static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d) 115 { 116 return rtnl_dereference(d->rx_handler_data); 117 } 118 119 void ipvlan_init_secret(void); 120 unsigned int ipvlan_mac_hash(const unsigned char *addr); 121 rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb); 122 void ipvlan_process_multicast(struct work_struct *work); 123 int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev); 124 void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr); 125 struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan, 126 const void *iaddr, bool is_v6); 127 bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6); 128 void ipvlan_ht_addr_del(struct ipvl_addr *addr); 129 struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb, 130 u16 proto); 131 unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb, 132 const struct nf_hook_state *state); 133 #endif /* __IPVLAN_H */ 134