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 }; 77 78 struct ipvl_addr { 79 struct ipvl_dev *master; /* Back pointer to master */ 80 union { 81 struct in6_addr ip6; /* IPv6 address on logical interface */ 82 struct in_addr ip4; /* IPv4 address on logical interface */ 83 } ipu; 84 #define ip6addr ipu.ip6 85 #define ip4addr ipu.ip4 86 struct hlist_node hlnode; /* Hash-table linkage */ 87 struct list_head anode; /* logical-interface linkage */ 88 ipvl_hdr_type atype; 89 struct rcu_head rcu; 90 }; 91 92 struct ipvl_port { 93 struct net_device *dev; 94 struct hlist_head hlhead[IPVLAN_HASH_SIZE]; 95 struct list_head ipvlans; 96 u16 mode; 97 struct work_struct wq; 98 struct sk_buff_head backlog; 99 int count; 100 struct ida ida; 101 }; 102 103 struct ipvl_skb_cb { 104 bool tx_pkt; 105 }; 106 #define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0])) 107 108 static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d) 109 { 110 return rcu_dereference(d->rx_handler_data); 111 } 112 113 static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d) 114 { 115 return rcu_dereference_bh(d->rx_handler_data); 116 } 117 118 static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d) 119 { 120 return rtnl_dereference(d->rx_handler_data); 121 } 122 123 void ipvlan_init_secret(void); 124 unsigned int ipvlan_mac_hash(const unsigned char *addr); 125 rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb); 126 void ipvlan_process_multicast(struct work_struct *work); 127 int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev); 128 void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr); 129 struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan, 130 const void *iaddr, bool is_v6); 131 bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6); 132 void ipvlan_ht_addr_del(struct ipvl_addr *addr); 133 struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb, 134 u16 proto); 135 unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb, 136 const struct nf_hook_state *state); 137 #endif /* __IPVLAN_H */ 138