tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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};
77
78struct 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
92struct ipvl_port {
93 struct net_device *dev;
94 struct hlist_head hlhead[IPVLAN_HASH_SIZE];
95 struct list_head ipvlans;
96 u16 mode;
97 u16 dev_id_start;
98 struct work_struct wq;
99 struct sk_buff_head backlog;
100 int count;
101 struct ida ida;
102};
103
104struct ipvl_skb_cb {
105 bool tx_pkt;
106};
107#define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))
108
109static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
110{
111 return rcu_dereference(d->rx_handler_data);
112}
113
114static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d)
115{
116 return rcu_dereference_bh(d->rx_handler_data);
117}
118
119static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
120{
121 return rtnl_dereference(d->rx_handler_data);
122}
123
124void ipvlan_init_secret(void);
125unsigned int ipvlan_mac_hash(const unsigned char *addr);
126rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
127void ipvlan_process_multicast(struct work_struct *work);
128int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
129void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
130struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
131 const void *iaddr, bool is_v6);
132bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
133void ipvlan_ht_addr_del(struct ipvl_addr *addr);
134struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
135 u16 proto);
136unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb,
137 const struct nf_hook_state *state);
138void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
139 unsigned int len, bool success, bool mcast);
140int ipvlan_link_new(struct net *src_net, struct net_device *dev,
141 struct nlattr *tb[], struct nlattr *data[]);
142void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
143void ipvlan_link_setup(struct net_device *dev);
144int ipvlan_link_register(struct rtnl_link_ops *ops);
145#endif /* __IPVLAN_H */