if_bridge.h

  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