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/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 spinlock_t addrs_lock;
78};
79
80struct ipvl_addr {
81 struct ipvl_dev *master; /* Back pointer to master */
82 union {
83 struct in6_addr ip6; /* IPv6 address on logical interface */
84 struct in_addr ip4; /* IPv4 address on logical interface */
85 } ipu;
86#define ip6addr ipu.ip6
87#define ip4addr ipu.ip4
88 struct hlist_node hlnode; /* Hash-table linkage */
89 struct list_head anode; /* logical-interface linkage */
90 ipvl_hdr_type atype;
91 struct rcu_head rcu;
92};
93
94struct ipvl_port {
95 struct net_device *dev;
96 possible_net_t pnet;
97 struct hlist_head hlhead[IPVLAN_HASH_SIZE];
98 struct list_head ipvlans;
99 u16 mode;
100 u16 flags;
101 u16 dev_id_start;
102 struct work_struct wq;
103 struct sk_buff_head backlog;
104 int count;
105 struct ida ida;
106};
107
108struct ipvl_skb_cb {
109 bool tx_pkt;
110};
111#define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))
112
113static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
114{
115 return rcu_dereference(d->rx_handler_data);
116}
117
118static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d)
119{
120 return rcu_dereference_bh(d->rx_handler_data);
121}
122
123static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
124{
125 return rtnl_dereference(d->rx_handler_data);
126}
127
128static inline bool ipvlan_is_private(const struct ipvl_port *port)
129{
130 return !!(port->flags & IPVLAN_F_PRIVATE);
131}
132
133static inline void ipvlan_mark_private(struct ipvl_port *port)
134{
135 port->flags |= IPVLAN_F_PRIVATE;
136}
137
138static inline void ipvlan_clear_private(struct ipvl_port *port)
139{
140 port->flags &= ~IPVLAN_F_PRIVATE;
141}
142
143static inline bool ipvlan_is_vepa(const struct ipvl_port *port)
144{
145 return !!(port->flags & IPVLAN_F_VEPA);
146}
147
148static inline void ipvlan_mark_vepa(struct ipvl_port *port)
149{
150 port->flags |= IPVLAN_F_VEPA;
151}
152
153static inline void ipvlan_clear_vepa(struct ipvl_port *port)
154{
155 port->flags &= ~IPVLAN_F_VEPA;
156}
157
158void ipvlan_init_secret(void);
159unsigned int ipvlan_mac_hash(const unsigned char *addr);
160rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
161void ipvlan_process_multicast(struct work_struct *work);
162int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
163void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
164struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
165 const void *iaddr, bool is_v6);
166bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
167void ipvlan_ht_addr_del(struct ipvl_addr *addr);
168struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
169 u16 proto);
170unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb,
171 const struct nf_hook_state *state);
172void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
173 unsigned int len, bool success, bool mcast);
174int ipvlan_link_new(struct net *src_net, struct net_device *dev,
175 struct nlattr *tb[], struct nlattr *data[],
176 struct netlink_ext_ack *extack);
177void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
178void ipvlan_link_setup(struct net_device *dev);
179int ipvlan_link_register(struct rtnl_link_ops *ops);
180
181static inline bool netif_is_ipvlan_port(const struct net_device *dev)
182{
183 return rcu_access_pointer(dev->rx_handler) == ipvlan_handle_frame;
184}
185
186#endif /* __IPVLAN_H */