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 
16 struct 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 
34 struct 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 
67 struct net_bridge;
68 void brioctl_set(int (*hook)(struct net *net, struct net_bridge *br,
69 			     unsigned int cmd, struct ifreq *ifr,
70 			     void __user *uarg));
71 int br_ioctl_call(struct net *net, struct net_bridge *br, unsigned int cmd,
72 		  struct ifreq *ifr, void __user *uarg);
73 
74 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)
75 int br_multicast_list_adjacent(struct net_device *dev,
76 			       struct list_head *br_ip_list);
77 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto);
78 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto);
79 bool br_multicast_has_router_adjacent(struct net_device *dev, int proto);
80 bool br_multicast_enabled(const struct net_device *dev);
81 bool br_multicast_router(const struct net_device *dev);
82 #else
br_multicast_list_adjacent(struct net_device * dev,struct list_head * br_ip_list)83 static inline int br_multicast_list_adjacent(struct net_device *dev,
84 					     struct list_head *br_ip_list)
85 {
86 	return 0;
87 }
br_multicast_has_querier_anywhere(struct net_device * dev,int proto)88 static inline bool br_multicast_has_querier_anywhere(struct net_device *dev,
89 						     int proto)
90 {
91 	return false;
92 }
br_multicast_has_querier_adjacent(struct net_device * dev,int proto)93 static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
94 						     int proto)
95 {
96 	return false;
97 }
98 
br_multicast_has_router_adjacent(struct net_device * dev,int proto)99 static inline bool br_multicast_has_router_adjacent(struct net_device *dev,
100 						    int proto)
101 {
102 	return true;
103 }
104 
br_multicast_enabled(const struct net_device * dev)105 static inline bool br_multicast_enabled(const struct net_device *dev)
106 {
107 	return false;
108 }
br_multicast_router(const struct net_device * dev)109 static inline bool br_multicast_router(const struct net_device *dev)
110 {
111 	return false;
112 }
113 #endif
114 
115 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING)
116 bool br_vlan_enabled(const struct net_device *dev);
117 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid);
118 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid);
119 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto);
120 int br_vlan_get_info(const struct net_device *dev, u16 vid,
121 		     struct bridge_vlan_info *p_vinfo);
122 int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
123 			 struct bridge_vlan_info *p_vinfo);
124 bool br_mst_enabled(const struct net_device *dev);
125 int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids);
126 int br_mst_get_state(const struct net_device *dev, u16 msti, u8 *state);
127 #else
br_vlan_enabled(const struct net_device * dev)128 static inline bool br_vlan_enabled(const struct net_device *dev)
129 {
130 	return false;
131 }
132 
br_vlan_get_pvid(const struct net_device * dev,u16 * p_pvid)133 static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
134 {
135 	return -EINVAL;
136 }
137 
br_vlan_get_proto(const struct net_device * dev,u16 * p_proto)138 static inline int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
139 {
140 	return -EINVAL;
141 }
142 
br_vlan_get_pvid_rcu(const struct net_device * dev,u16 * p_pvid)143 static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
144 {
145 	return -EINVAL;
146 }
147 
br_vlan_get_info(const struct net_device * dev,u16 vid,struct bridge_vlan_info * p_vinfo)148 static inline int br_vlan_get_info(const struct net_device *dev, u16 vid,
149 				   struct bridge_vlan_info *p_vinfo)
150 {
151 	return -EINVAL;
152 }
153 
br_vlan_get_info_rcu(const struct net_device * dev,u16 vid,struct bridge_vlan_info * p_vinfo)154 static inline int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
155 				       struct bridge_vlan_info *p_vinfo)
156 {
157 	return -EINVAL;
158 }
159 
br_mst_enabled(const struct net_device * dev)160 static inline bool br_mst_enabled(const struct net_device *dev)
161 {
162 	return false;
163 }
164 
br_mst_get_info(const struct net_device * dev,u16 msti,unsigned long * vids)165 static inline int br_mst_get_info(const struct net_device *dev, u16 msti,
166 				  unsigned long *vids)
167 {
168 	return -EINVAL;
169 }
br_mst_get_state(const struct net_device * dev,u16 msti,u8 * state)170 static inline int br_mst_get_state(const struct net_device *dev, u16 msti,
171 				   u8 *state)
172 {
173 	return -EINVAL;
174 }
175 #endif
176 
177 #if IS_ENABLED(CONFIG_BRIDGE)
178 struct net_device *br_fdb_find_port(const struct net_device *br_dev,
179 				    const unsigned char *addr,
180 				    __u16 vid);
181 void br_fdb_clear_offload(const struct net_device *dev, u16 vid);
182 bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag);
183 u8 br_port_get_stp_state(const struct net_device *dev);
184 clock_t br_get_ageing_time(const struct net_device *br_dev);
185 #else
186 static inline struct net_device *
br_fdb_find_port(const struct net_device * br_dev,const unsigned char * addr,__u16 vid)187 br_fdb_find_port(const struct net_device *br_dev,
188 		 const unsigned char *addr,
189 		 __u16 vid)
190 {
191 	return NULL;
192 }
193 
br_fdb_clear_offload(const struct net_device * dev,u16 vid)194 static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
195 {
196 }
197 
198 static inline bool
br_port_flag_is_set(const struct net_device * dev,unsigned long flag)199 br_port_flag_is_set(const struct net_device *dev, unsigned long flag)
200 {
201 	return false;
202 }
203 
br_port_get_stp_state(const struct net_device * dev)204 static inline u8 br_port_get_stp_state(const struct net_device *dev)
205 {
206 	return BR_STATE_DISABLED;
207 }
208 
br_get_ageing_time(const struct net_device * br_dev)209 static inline clock_t br_get_ageing_time(const struct net_device *br_dev)
210 {
211 	return 0;
212 }
213 #endif
214 
215 #endif
216