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/netns/generic.h>
  30#include <net/rtnetlink.h>
  31#include <net/route.h>
  32#include <net/addrconf.h>
  33#include <net/l3mdev.h>
  34
  35#define IPVLAN_DRV      "ipvlan"
  36#define IPV_DRV_VER     "0.1"
  37
  38#define IPVLAN_HASH_SIZE        (1 << BITS_PER_BYTE)
  39#define IPVLAN_HASH_MASK        (IPVLAN_HASH_SIZE - 1)
  40
  41#define IPVLAN_MAC_FILTER_BITS  8
  42#define IPVLAN_MAC_FILTER_SIZE  (1 << IPVLAN_MAC_FILTER_BITS)
  43#define IPVLAN_MAC_FILTER_MASK  (IPVLAN_MAC_FILTER_SIZE - 1)
  44
  45#define IPVLAN_QBACKLOG_LIMIT   1000
  46
  47typedef enum {
  48        IPVL_IPV6 = 0,
  49        IPVL_ICMPV6,
  50        IPVL_IPV4,
  51        IPVL_ARP,
  52} ipvl_hdr_type;
  53
  54struct ipvl_pcpu_stats {
  55        u64                     rx_pkts;
  56        u64                     rx_bytes;
  57        u64                     rx_mcast;
  58        u64                     tx_pkts;
  59        u64                     tx_bytes;
  60        struct u64_stats_sync   syncp;
  61        u32                     rx_errs;
  62        u32                     tx_drps;
  63};
  64
  65struct ipvl_port;
  66
  67struct ipvl_dev {
  68        struct net_device       *dev;
  69        struct list_head        pnode;
  70        struct ipvl_port        *port;
  71        struct net_device       *phy_dev;
  72        struct list_head        addrs;
  73        struct ipvl_pcpu_stats  __percpu *pcpu_stats;
  74        DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
  75        netdev_features_t       sfeatures;
  76        u32                     msg_enable;
  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        possible_net_t          pnet;
  96        struct hlist_head       hlhead[IPVLAN_HASH_SIZE];
  97        struct list_head        ipvlans;
  98        u16                     mode;
  99        u16                     dev_id_start;
 100        struct work_struct      wq;
 101        struct sk_buff_head     backlog;
 102        int                     count;
 103        struct ida              ida;
 104};
 105
 106struct ipvl_skb_cb {
 107        bool tx_pkt;
 108};
 109#define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))
 110
 111static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
 112{
 113        return rcu_dereference(d->rx_handler_data);
 114}
 115
 116static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d)
 117{
 118        return rcu_dereference_bh(d->rx_handler_data);
 119}
 120
 121static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
 122{
 123        return rtnl_dereference(d->rx_handler_data);
 124}
 125
 126void ipvlan_init_secret(void);
 127unsigned int ipvlan_mac_hash(const unsigned char *addr);
 128rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
 129void ipvlan_process_multicast(struct work_struct *work);
 130int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
 131void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
 132struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
 133                                   const void *iaddr, bool is_v6);
 134bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
 135void ipvlan_ht_addr_del(struct ipvl_addr *addr);
 136struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
 137                              u16 proto);
 138unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb,
 139                             const struct nf_hook_state *state);
 140void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
 141                     unsigned int len, bool success, bool mcast);
 142int ipvlan_link_new(struct net *src_net, struct net_device *dev,
 143                    struct nlattr *tb[], struct nlattr *data[]);
 144void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
 145void ipvlan_link_setup(struct net_device *dev);
 146int ipvlan_link_register(struct rtnl_link_ops *ops);
 147#endif /* __IPVLAN_H */
 148