1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Lennert Buytenhek <buytenh@gnu.org>
7 */
8#ifndef _LINUX_IF_BRIDGE_H
9#define _LINUX_IF_BRIDGE_H
10
11
12#include <linux/netdevice.h>
13#include <uapi/linux/if_bridge.h>
14#include <linux/bitops.h>
15
16struct br_ip {
17 union {
18 __be32 ip4;
19#if IS_ENABLED(CONFIG_IPV6)
20 struct in6_addr ip6;
21#endif
22 } src;
23 union {
24 __be32 ip4;
25#if IS_ENABLED(CONFIG_IPV6)
26 struct in6_addr ip6;
27#endif
28 unsigned char mac_addr[ETH_ALEN];
29 } dst;
30 __be16 proto;
31 __u16 vid;
32};
33
34struct br_ip_list {
35 struct list_head list;
36 struct br_ip addr;
37};
38
39#define BR_HAIRPIN_MODE BIT(0)
40#define BR_BPDU_GUARD BIT(1)
41#define BR_ROOT_BLOCK BIT(2)
42#define BR_MULTICAST_FAST_LEAVE BIT(3)
43#define BR_ADMIN_COST BIT(4)
44#define BR_LEARNING BIT(5)
45#define BR_FLOOD BIT(6)
46#define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING)
47#define BR_PROMISC BIT(7)
48#define BR_PROXYARP BIT(8)
49#define BR_LEARNING_SYNC BIT(9)
50#define BR_PROXYARP_WIFI BIT(10)
51#define BR_MCAST_FLOOD BIT(11)
52#define BR_MULTICAST_TO_UNICAST BIT(12)
53#define BR_VLAN_TUNNEL BIT(13)
54#define BR_BCAST_FLOOD BIT(14)
55#define BR_NEIGH_SUPPRESS BIT(15)
56#define BR_ISOLATED BIT(16)
57#define BR_MRP_AWARE BIT(17)
58#define BR_MRP_LOST_CONT BIT(18)
59#define BR_MRP_LOST_IN_CONT BIT(19)
60#define BR_TX_FWD_OFFLOAD BIT(20)
61#define BR_PORT_LOCKED BIT(21)
62#define BR_PORT_MAB BIT(22)
63#define BR_NEIGH_VLAN_SUPPRESS BIT(23)
64
65#define BR_DEFAULT_AGEING_TIME (300 * HZ)
66
67struct net_bridge;
68void brioctl_set(int (*hook)(struct net *net, unsigned int cmd,
69 void __user *uarg));
70int br_ioctl_call(struct net *net, unsigned int cmd, void __user *uarg);
71
72#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)
73int br_multicast_list_adjacent(struct net_device *dev,
74 struct list_head *br_ip_list);
75bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto);
76bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto);
77bool br_multicast_has_router_adjacent(struct net_device *dev, int proto);
78bool br_multicast_enabled(const struct net_device *dev);
79bool br_multicast_router(const struct net_device *dev);
80#else
81static inline int br_multicast_list_adjacent(struct net_device *dev,
82 struct list_head *br_ip_list)
83{
84 return 0;
85}
86static inline bool br_multicast_has_querier_anywhere(struct net_device *dev,
87 int proto)
88{
89 return false;
90}
91static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
92 int proto)
93{
94 return false;
95}
96
97static inline bool br_multicast_has_router_adjacent(struct net_device *dev,
98 int proto)
99{
100 return true;
101}
102
103static inline bool br_multicast_enabled(const struct net_device *dev)
104{
105 return false;
106}
107static inline bool br_multicast_router(const struct net_device *dev)
108{
109 return false;
110}
111#endif
112
113#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING)
114bool br_vlan_enabled(const struct net_device *dev);
115int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid);
116int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid);
117int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto);
118int br_vlan_get_info(const struct net_device *dev, u16 vid,
119 struct bridge_vlan_info *p_vinfo);
120int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
121 struct bridge_vlan_info *p_vinfo);
122bool br_mst_enabled(const struct net_device *dev);
123int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids);
124int br_mst_get_state(const struct net_device *dev, u16 msti, u8 *state);
125#else
126static inline bool br_vlan_enabled(const struct net_device *dev)
127{
128 return false;
129}
130
131static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
132{
133 return -EINVAL;
134}
135
136static inline int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
137{
138 return -EINVAL;
139}
140
141static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
142{
143 return -EINVAL;
144}
145
146static inline int br_vlan_get_info(const struct net_device *dev, u16 vid,
147 struct bridge_vlan_info *p_vinfo)
148{
149 return -EINVAL;
150}
151
152static inline int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
153 struct bridge_vlan_info *p_vinfo)
154{
155 return -EINVAL;
156}
157
158static inline bool br_mst_enabled(const struct net_device *dev)
159{
160 return false;
161}
162
163static inline int br_mst_get_info(const struct net_device *dev, u16 msti,
164 unsigned long *vids)
165{
166 return -EINVAL;
167}
168static inline int br_mst_get_state(const struct net_device *dev, u16 msti,
169 u8 *state)
170{
171 return -EINVAL;
172}
173#endif
174
175#if IS_ENABLED(CONFIG_BRIDGE)
176struct net_device *br_fdb_find_port(const struct net_device *br_dev,
177 const unsigned char *addr,
178 __u16 vid);
179void br_fdb_clear_offload(const struct net_device *dev, u16 vid);
180bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag);
181u8 br_port_get_stp_state(const struct net_device *dev);
182clock_t br_get_ageing_time(const struct net_device *br_dev);
183#else
184static inline struct net_device *
185br_fdb_find_port(const struct net_device *br_dev,
186 const unsigned char *addr,
187 __u16 vid)
188{
189 return NULL;
190}
191
192static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
193{
194}
195
196static inline bool
197br_port_flag_is_set(const struct net_device *dev, unsigned long flag)
198{
199 return false;
200}
201
202static inline u8 br_port_get_stp_state(const struct net_device *dev)
203{
204 return BR_STATE_DISABLED;
205}
206
207static inline clock_t br_get_ageing_time(const struct net_device *br_dev)
208{
209 return 0;
210}
211#endif
212
213#endif
214