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 <net/ip.h> 27 #include <net/ip6_route.h> 28 #include <net/rtnetlink.h> 29 #include <net/route.h> 30 #include <net/addrconf.h> 31 32 #define IPVLAN_DRV "ipvlan" 33 #define IPV_DRV_VER "0.1" 34 35 #define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE) 36 #define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1) 37 38 #define IPVLAN_MAC_FILTER_BITS 8 39 #define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS) 40 #define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1) 41 42 #define IPVLAN_QBACKLOG_LIMIT 1000 43 44 typedef enum { 45 IPVL_IPV6 = 0, 46 IPVL_ICMPV6, 47 IPVL_IPV4, 48 IPVL_ARP, 49 } ipvl_hdr_type; 50 51 struct ipvl_pcpu_stats { 52 u64 rx_pkts; 53 u64 rx_bytes; 54 u64 rx_mcast; 55 u64 tx_pkts; 56 u64 tx_bytes; 57 struct u64_stats_sync syncp; 58 u32 rx_errs; 59 u32 tx_drps; 60 }; 61 62 struct ipvl_port; 63 64 struct ipvl_dev { 65 struct net_device *dev; 66 struct list_head pnode; 67 struct ipvl_port *port; 68 struct net_device *phy_dev; 69 struct list_head addrs; 70 struct ipvl_pcpu_stats __percpu *pcpu_stats; 71 DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE); 72 netdev_features_t sfeatures; 73 u32 msg_enable; 74 u16 mtu_adj; 75 }; 76 77 struct ipvl_addr { 78 struct ipvl_dev *master; /* Back pointer to master */ 79 union { 80 struct in6_addr ip6; /* IPv6 address on logical interface */ 81 struct in_addr ip4; /* IPv4 address on logical interface */ 82 } ipu; 83 #define ip6addr ipu.ip6 84 #define ip4addr ipu.ip4 85 struct hlist_node hlnode; /* Hash-table linkage */ 86 struct list_head anode; /* logical-interface linkage */ 87 ipvl_hdr_type atype; 88 struct rcu_head rcu; 89 }; 90 91 struct ipvl_port { 92 struct net_device *dev; 93 struct hlist_head hlhead[IPVLAN_HASH_SIZE]; 94 struct list_head ipvlans; 95 u16 mode; 96 struct work_struct wq; 97 struct sk_buff_head backlog; 98 int count; 99 struct rcu_head rcu; 100 }; 101 102 static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d) 103 { 104 return rcu_dereference(d->rx_handler_data); 105 } 106 107 static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d) 108 { 109 return rcu_dereference_bh(d->rx_handler_data); 110 } 111 112 static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d) 113 { 114 return rtnl_dereference(d->rx_handler_data); 115 } 116 117 void ipvlan_init_secret(void); 118 unsigned int ipvlan_mac_hash(const unsigned char *addr); 119 rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb); 120 void ipvlan_process_multicast(struct work_struct *work); 121 int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev); 122 void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr); 123 struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan, 124 const void *iaddr, bool is_v6); 125 bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6); 126 void ipvlan_ht_addr_del(struct ipvl_addr *addr); 127 #endif /* __IPVLAN_H */ 128