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 
63 #define BR_DEFAULT_AGEING_TIME	(300 * HZ)
64 
65 struct net_bridge;
66 void brioctl_set(int (*hook)(struct net *net, struct net_bridge *br,
67 			     unsigned int cmd, struct ifreq *ifr,
68 			     void __user *uarg));
69 int br_ioctl_call(struct net *net, struct net_bridge *br, unsigned int cmd,
70 		  struct ifreq *ifr, void __user *uarg);
71 
72 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)
73 int br_multicast_list_adjacent(struct net_device *dev,
74 			       struct list_head *br_ip_list);
75 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto);
76 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto);
77 bool br_multicast_has_router_adjacent(struct net_device *dev, int proto);
78 bool br_multicast_enabled(const struct net_device *dev);
79 bool br_multicast_router(const struct net_device *dev);
80 #else
br_multicast_list_adjacent(struct net_device * dev,struct list_head * br_ip_list)81 static inline int br_multicast_list_adjacent(struct net_device *dev,
82 					     struct list_head *br_ip_list)
83 {
84 	return 0;
85 }
br_multicast_has_querier_anywhere(struct net_device * dev,int proto)86 static inline bool br_multicast_has_querier_anywhere(struct net_device *dev,
87 						     int proto)
88 {
89 	return false;
90 }
br_multicast_has_querier_adjacent(struct net_device * dev,int proto)91 static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
92 						     int proto)
93 {
94 	return false;
95 }
96 
br_multicast_has_router_adjacent(struct net_device * dev,int proto)97 static inline bool br_multicast_has_router_adjacent(struct net_device *dev,
98 						    int proto)
99 {
100 	return true;
101 }
102 
br_multicast_enabled(const struct net_device * dev)103 static inline bool br_multicast_enabled(const struct net_device *dev)
104 {
105 	return false;
106 }
br_multicast_router(const struct net_device * dev)107 static 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)
114 bool br_vlan_enabled(const struct net_device *dev);
115 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid);
116 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid);
117 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto);
118 int br_vlan_get_info(const struct net_device *dev, u16 vid,
119 		     struct bridge_vlan_info *p_vinfo);
120 int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
121 			 struct bridge_vlan_info *p_vinfo);
122 bool br_mst_enabled(const struct net_device *dev);
123 int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids);
124 int br_mst_get_state(const struct net_device *dev, u16 msti, u8 *state);
125 #else
br_vlan_enabled(const struct net_device * dev)126 static inline bool br_vlan_enabled(const struct net_device *dev)
127 {
128 	return false;
129 }
130 
br_vlan_get_pvid(const struct net_device * dev,u16 * p_pvid)131 static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
132 {
133 	return -EINVAL;
134 }
135 
br_vlan_get_proto(const struct net_device * dev,u16 * p_proto)136 static inline int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
137 {
138 	return -EINVAL;
139 }
140 
br_vlan_get_pvid_rcu(const struct net_device * dev,u16 * p_pvid)141 static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
142 {
143 	return -EINVAL;
144 }
145 
br_vlan_get_info(const struct net_device * dev,u16 vid,struct bridge_vlan_info * p_vinfo)146 static 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 
br_vlan_get_info_rcu(const struct net_device * dev,u16 vid,struct bridge_vlan_info * p_vinfo)152 static 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 
br_mst_enabled(const struct net_device * dev)158 static inline bool br_mst_enabled(const struct net_device *dev)
159 {
160 	return false;
161 }
162 
br_mst_get_info(const struct net_device * dev,u16 msti,unsigned long * vids)163 static inline int br_mst_get_info(const struct net_device *dev, u16 msti,
164 				  unsigned long *vids)
165 {
166 	return -EINVAL;
167 }
br_mst_get_state(const struct net_device * dev,u16 msti,u8 * state)168 static 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)
176 struct net_device *br_fdb_find_port(const struct net_device *br_dev,
177 				    const unsigned char *addr,
178 				    __u16 vid);
179 void br_fdb_clear_offload(const struct net_device *dev, u16 vid);
180 bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag);
181 u8 br_port_get_stp_state(const struct net_device *dev);
182 clock_t br_get_ageing_time(const struct net_device *br_dev);
183 #else
184 static inline struct net_device *
br_fdb_find_port(const struct net_device * br_dev,const unsigned char * addr,__u16 vid)185 br_fdb_find_port(const struct net_device *br_dev,
186 		 const unsigned char *addr,
187 		 __u16 vid)
188 {
189 	return NULL;
190 }
191 
br_fdb_clear_offload(const struct net_device * dev,u16 vid)192 static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
193 {
194 }
195 
196 static inline bool
br_port_flag_is_set(const struct net_device * dev,unsigned long flag)197 br_port_flag_is_set(const struct net_device *dev, unsigned long flag)
198 {
199 	return false;
200 }
201 
br_port_get_stp_state(const struct net_device * dev)202 static inline u8 br_port_get_stp_state(const struct net_device *dev)
203 {
204 	return BR_STATE_DISABLED;
205 }
206 
br_get_ageing_time(const struct net_device * br_dev)207 static inline clock_t br_get_ageing_time(const struct net_device *br_dev)
208 {
209 	return 0;
210 }
211 #endif
212 
213 #endif
214