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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (c) 2014 Mahesh Bandewar <[email protected]>
4 */
5#ifndef __IPVLAN_H
6#define __IPVLAN_H
7
8#include <linux/kernel.h>
9#include <linux/types.h>
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/rculist.h>
13#include <linux/notifier.h>
14#include <linux/netdevice.h>
15#include <linux/etherdevice.h>
16#include <linux/if_arp.h>
17#include <linux/if_link.h>
18#include <linux/if_vlan.h>
19#include <linux/ip.h>
20#include <linux/inetdevice.h>
21#include <linux/netfilter.h>
22#include <net/ip.h>
23#include <net/ip6_route.h>
24#include <net/netns/generic.h>
25#include <net/rtnetlink.h>
26#include <net/route.h>
27#include <net/addrconf.h>
28#include <net/l3mdev.h>
29
30#define IPVLAN_DRV "ipvlan"
31#define IPV_DRV_VER "0.1"
32
33#define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
34#define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1)
35
36#define IPVLAN_MAC_FILTER_BITS 8
37#define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS)
38#define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1)
39
40#define IPVLAN_QBACKLOG_LIMIT 1000
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_stats_t rx_pkts;
51 u64_stats_t rx_bytes;
52 u64_stats_t rx_mcast;
53 u64_stats_t tx_pkts;
54 u64_stats_t 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 struct ipvl_pcpu_stats __percpu *pcpu_stats;
69 DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
70 netdev_features_t sfeatures;
71 u32 msg_enable;
72 bool dying;
73};
74
75struct ipvl_addr {
76 struct ipvl_dev *master; /* Back pointer to master */
77 union {
78 struct in6_addr ip6; /* IPv6 address on logical interface */
79 struct in_addr ip4; /* IPv4 address on logical interface */
80 } ipu;
81#define ip6addr ipu.ip6
82#define ip4addr ipu.ip4
83 struct hlist_node hlnode; /* Hash-table linkage */
84 struct list_head anode; /* logical-interface linkage */
85 ipvl_hdr_type atype;
86 struct rcu_head rcu;
87};
88
89struct ipvl_port {
90 struct net_device *dev;
91 possible_net_t pnet;
92 struct hlist_head hlhead[IPVLAN_HASH_SIZE];
93 spinlock_t addrs_lock; /* guards hash-table and addrs */
94 struct list_head ipvlans;
95 struct mutex pnodes_lock;
96 u16 mode;
97 u16 flags;
98 u16 dev_id_start;
99 struct work_struct wq;
100 struct sk_buff_head backlog;
101 refcount_t count;
102 struct ida ida;
103 netdevice_tracker dev_tracker;
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
126static inline bool ipvlan_is_private(const struct ipvl_port *port)
127{
128 return !!(port->flags & IPVLAN_F_PRIVATE);
129}
130
131static inline void ipvlan_mark_private(struct ipvl_port *port)
132{
133 port->flags |= IPVLAN_F_PRIVATE;
134}
135
136static inline void ipvlan_clear_private(struct ipvl_port *port)
137{
138 port->flags &= ~IPVLAN_F_PRIVATE;
139}
140
141static inline bool ipvlan_is_vepa(const struct ipvl_port *port)
142{
143 return !!(port->flags & IPVLAN_F_VEPA);
144}
145
146static inline void ipvlan_mark_vepa(struct ipvl_port *port)
147{
148 port->flags |= IPVLAN_F_VEPA;
149}
150
151static inline void ipvlan_clear_vepa(struct ipvl_port *port)
152{
153 port->flags &= ~IPVLAN_F_VEPA;
154}
155
156void ipvlan_init_secret(void);
157unsigned int ipvlan_mac_hash(const unsigned char *addr);
158rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
159void ipvlan_process_multicast(struct work_struct *work);
160int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
161void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
162struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
163 const void *iaddr, bool is_v6);
164bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
165void ipvlan_ht_addr_del(struct ipvl_addr *addr);
166struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port, void *lyr3h,
167 int addr_type, bool use_dest);
168void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type);
169void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
170 unsigned int len, bool success, bool mcast);
171int ipvlan_link_new(struct net_device *dev, struct rtnl_newlink_params *params,
172 struct netlink_ext_ack *extack);
173void __ipvlan_link_delete(struct net *net, struct net_device *dev,
174 struct list_head *head);
175void ipvlan_link_setup(struct net_device *dev);
176int ipvlan_link_register(struct rtnl_link_ops *ops);
177#ifdef CONFIG_IPVLAN_L3S
178int ipvlan_l3s_register(struct ipvl_port *port);
179void ipvlan_l3s_unregister(struct ipvl_port *port);
180void ipvlan_migrate_l3s_hook(struct net *oldnet, struct net *newnet);
181int ipvlan_l3s_init(void);
182void ipvlan_l3s_cleanup(void);
183#else
184static inline int ipvlan_l3s_register(struct ipvl_port *port)
185{
186 return -ENOTSUPP;
187}
188
189static inline void ipvlan_l3s_unregister(struct ipvl_port *port)
190{
191}
192
193static inline void ipvlan_migrate_l3s_hook(struct net *oldnet,
194 struct net *newnet)
195{
196}
197
198static inline int ipvlan_l3s_init(void)
199{
200 return 0;
201}
202
203static inline void ipvlan_l3s_cleanup(void)
204{
205}
206#endif /* CONFIG_IPVLAN_L3S */
207
208static inline bool netif_is_ipvlan_port(const struct net_device *dev)
209{
210 return rcu_access_pointer(dev->rx_handler) == ipvlan_handle_frame;
211}
212
213#if IS_ENABLED(CONFIG_IPVTAP)
214extern void (*__ipvtap_dellink_ptr)(struct net *net, struct net_device *dev,
215 struct list_head *head);
216#endif
217
218#endif /* __IPVLAN_H */