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 <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
  46typedef enum {
  47        IPVL_IPV6 = 0,
  48        IPVL_ICMPV6,
  49        IPVL_IPV4,
  50        IPVL_ARP,
  51} ipvl_hdr_type;
  52
  53struct 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
  64struct ipvl_port;
  65
  66struct 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
  79struct 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
  93struct 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
 104static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
 105{
 106        return rcu_dereference(d->rx_handler_data);
 107}
 108
 109static 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
 114static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
 115{
 116        return rtnl_dereference(d->rx_handler_data);
 117}
 118
 119void ipvlan_init_secret(void);
 120unsigned int ipvlan_mac_hash(const unsigned char *addr);
 121rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
 122void ipvlan_process_multicast(struct work_struct *work);
 123int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
 124void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
 125struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
 126                                   const void *iaddr, bool is_v6);
 127bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
 128void ipvlan_ht_addr_del(struct ipvl_addr *addr);
 129struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
 130                              u16 proto);
 131unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb,
 132                             const struct nf_hook_state *state);
 133#endif /* __IPVLAN_H */
 134