LXR linux/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
  42typedef enum {
  43        IPVL_IPV6 = 0,
  44        IPVL_ICMPV6,
  45        IPVL_IPV4,
  46        IPVL_ARP,
  47} ipvl_hdr_type;
  48
  49struct ipvl_pcpu_stats {
  50        u64                     rx_pkts;
  51        u64                     rx_bytes;
  52        u64                     rx_mcast;
  53        u64                     tx_pkts;
  54        u64                     tx_bytes;
  55        struct u64_stats_sync   syncp;
  56        u32                     rx_errs;
  57        u32                     tx_drps;
  58};
  59
  60struct ipvl_port;
  61
  62struct ipvl_dev {
  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        int                     ipv4cnt;
  69        int                     ipv6cnt;
  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
  77struct 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
  91struct 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        int                     count;
  97        u16                     mode;
  98};
  99
 100static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
 101{
 102        return rcu_dereference(d->rx_handler_data);
 103}
 104
 105static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
 106{
 107        return rtnl_dereference(d->rx_handler_data);
 108}
 109
 110void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev);
 111void ipvlan_set_port_mode(struct ipvl_port *port, u32 nval);
 112void ipvlan_init_secret(void);
 113unsigned int ipvlan_mac_hash(const unsigned char *addr);
 114rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
 115int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
 116void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
 117struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
 118                                   const void *iaddr, bool is_v6);
 119bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
 120struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port,
 121                                        const void *iaddr, bool is_v6);
 122void ipvlan_ht_addr_del(struct ipvl_addr *addr, bool sync);
 123#endif /* __IPVLAN_H */
 124