1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com> |
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 | |
42 | typedef enum { |
43 | IPVL_IPV6 = 0, |
44 | IPVL_ICMPV6, |
45 | IPVL_IPV4, |
46 | IPVL_ARP, |
47 | } ipvl_hdr_type; |
48 | |
49 | struct 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 | |
60 | struct ipvl_port; |
61 | |
62 | struct 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 | spinlock_t addrs_lock; |
73 | }; |
74 | |
75 | struct 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 | |
89 | struct ipvl_port { |
90 | struct net_device *dev; |
91 | possible_net_t pnet; |
92 | struct hlist_head hlhead[IPVLAN_HASH_SIZE]; |
93 | struct list_head ipvlans; |
94 | u16 mode; |
95 | u16 flags; |
96 | u16 dev_id_start; |
97 | struct work_struct wq; |
98 | struct sk_buff_head backlog; |
99 | int count; |
100 | struct ida ida; |
101 | netdevice_tracker dev_tracker; |
102 | }; |
103 | |
104 | struct ipvl_skb_cb { |
105 | bool tx_pkt; |
106 | }; |
107 | #define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0])) |
108 | |
109 | static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d) |
110 | { |
111 | return rcu_dereference(d->rx_handler_data); |
112 | } |
113 | |
114 | static 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 | |
119 | static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d) |
120 | { |
121 | return rtnl_dereference(d->rx_handler_data); |
122 | } |
123 | |
124 | static inline bool ipvlan_is_private(const struct ipvl_port *port) |
125 | { |
126 | return !!(port->flags & IPVLAN_F_PRIVATE); |
127 | } |
128 | |
129 | static inline void ipvlan_mark_private(struct ipvl_port *port) |
130 | { |
131 | port->flags |= IPVLAN_F_PRIVATE; |
132 | } |
133 | |
134 | static inline void ipvlan_clear_private(struct ipvl_port *port) |
135 | { |
136 | port->flags &= ~IPVLAN_F_PRIVATE; |
137 | } |
138 | |
139 | static inline bool ipvlan_is_vepa(const struct ipvl_port *port) |
140 | { |
141 | return !!(port->flags & IPVLAN_F_VEPA); |
142 | } |
143 | |
144 | static inline void ipvlan_mark_vepa(struct ipvl_port *port) |
145 | { |
146 | port->flags |= IPVLAN_F_VEPA; |
147 | } |
148 | |
149 | static inline void ipvlan_clear_vepa(struct ipvl_port *port) |
150 | { |
151 | port->flags &= ~IPVLAN_F_VEPA; |
152 | } |
153 | |
154 | void ipvlan_init_secret(void); |
155 | unsigned int ipvlan_mac_hash(const unsigned char *addr); |
156 | rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb); |
157 | void ipvlan_process_multicast(struct work_struct *work); |
158 | int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev); |
159 | void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr); |
160 | struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan, |
161 | const void *iaddr, bool is_v6); |
162 | bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6); |
163 | void ipvlan_ht_addr_del(struct ipvl_addr *addr); |
164 | struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port, void *lyr3h, |
165 | int addr_type, bool use_dest); |
166 | void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type); |
167 | void ipvlan_count_rx(const struct ipvl_dev *ipvlan, |
168 | unsigned int len, bool success, bool mcast); |
169 | int ipvlan_link_new(struct net *src_net, struct net_device *dev, |
170 | struct nlattr *tb[], struct nlattr *data[], |
171 | struct netlink_ext_ack *extack); |
172 | void ipvlan_link_delete(struct net_device *dev, struct list_head *head); |
173 | void ipvlan_link_setup(struct net_device *dev); |
174 | int ipvlan_link_register(struct rtnl_link_ops *ops); |
175 | #ifdef CONFIG_IPVLAN_L3S |
176 | int ipvlan_l3s_register(struct ipvl_port *port); |
177 | void ipvlan_l3s_unregister(struct ipvl_port *port); |
178 | void ipvlan_migrate_l3s_hook(struct net *oldnet, struct net *newnet); |
179 | int ipvlan_l3s_init(void); |
180 | void ipvlan_l3s_cleanup(void); |
181 | #else |
182 | static inline int ipvlan_l3s_register(struct ipvl_port *port) |
183 | { |
184 | return -ENOTSUPP; |
185 | } |
186 | |
187 | static inline void ipvlan_l3s_unregister(struct ipvl_port *port) |
188 | { |
189 | } |
190 | |
191 | static inline void ipvlan_migrate_l3s_hook(struct net *oldnet, |
192 | struct net *newnet) |
193 | { |
194 | } |
195 | |
196 | static inline int ipvlan_l3s_init(void) |
197 | { |
198 | return 0; |
199 | } |
200 | |
201 | static inline void ipvlan_l3s_cleanup(void) |
202 | { |
203 | } |
204 | #endif /* CONFIG_IPVLAN_L3S */ |
205 | |
206 | static inline bool netif_is_ipvlan_port(const struct net_device *dev) |
207 | { |
208 | return rcu_access_pointer(dev->rx_handler) == ipvlan_handle_frame; |
209 | } |
210 | |
211 | #endif /* __IPVLAN_H */ |
212 | |