drivers/net/ipvlan/ipvlan.h

   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         struct rcu_head         rcu;
  88         ipvl_hdr_type           atype;
  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         struct rcu_head         rcu;
  96         struct work_struct      wq;
  97         struct sk_buff_head     backlog;
  98         int                     count;
  99         u16                     mode;
 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_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev);
 118 void ipvlan_set_port_mode(struct ipvl_port *port, u32 nval);
 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 struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port,
 129                                         const void *iaddr, bool is_v6);
 130 void ipvlan_ht_addr_del(struct ipvl_addr *addr);
 131 #endif /* __IPVLAN_H */