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TOMOYO Linux Cross Reference
Linux/include/net/switchdev.h

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  1 /*
  2  * include/net/switchdev.h - Switch device API
  3  * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us>
  4  * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License as published by
  8  * the Free Software Foundation; either version 2 of the License, or
  9  * (at your option) any later version.
 10  */
 11 #ifndef _LINUX_SWITCHDEV_H_
 12 #define _LINUX_SWITCHDEV_H_
 13 
 14 #include <linux/netdevice.h>
 15 #include <linux/notifier.h>
 16 #include <linux/list.h>
 17 #include <net/ip_fib.h>
 18 
 19 #define SWITCHDEV_F_NO_RECURSE          BIT(0)
 20 #define SWITCHDEV_F_SKIP_EOPNOTSUPP     BIT(1)
 21 #define SWITCHDEV_F_DEFER               BIT(2)
 22 
 23 struct switchdev_trans_item {
 24         struct list_head list;
 25         void *data;
 26         void (*destructor)(const void *data);
 27 };
 28 
 29 struct switchdev_trans {
 30         struct list_head item_list;
 31         bool ph_prepare;
 32 };
 33 
 34 static inline bool switchdev_trans_ph_prepare(struct switchdev_trans *trans)
 35 {
 36         return trans && trans->ph_prepare;
 37 }
 38 
 39 static inline bool switchdev_trans_ph_commit(struct switchdev_trans *trans)
 40 {
 41         return trans && !trans->ph_prepare;
 42 }
 43 
 44 enum switchdev_attr_id {
 45         SWITCHDEV_ATTR_ID_UNDEFINED,
 46         SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
 47         SWITCHDEV_ATTR_ID_PORT_STP_STATE,
 48         SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
 49         SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT,
 50         SWITCHDEV_ATTR_ID_PORT_MROUTER,
 51         SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
 52         SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
 53         SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
 54         SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
 55 };
 56 
 57 struct switchdev_attr {
 58         struct net_device *orig_dev;
 59         enum switchdev_attr_id id;
 60         u32 flags;
 61         void *complete_priv;
 62         void (*complete)(struct net_device *dev, int err, void *priv);
 63         union {
 64                 struct netdev_phys_item_id ppid;        /* PORT_PARENT_ID */
 65                 u8 stp_state;                           /* PORT_STP_STATE */
 66                 unsigned long brport_flags;             /* PORT_BRIDGE_FLAGS */
 67                 unsigned long brport_flags_support;     /* PORT_BRIDGE_FLAGS_SUPPORT */
 68                 bool mrouter;                           /* PORT_MROUTER */
 69                 clock_t ageing_time;                    /* BRIDGE_AGEING_TIME */
 70                 bool vlan_filtering;                    /* BRIDGE_VLAN_FILTERING */
 71                 bool mc_disabled;                       /* MC_DISABLED */
 72         } u;
 73 };
 74 
 75 enum switchdev_obj_id {
 76         SWITCHDEV_OBJ_ID_UNDEFINED,
 77         SWITCHDEV_OBJ_ID_PORT_VLAN,
 78         SWITCHDEV_OBJ_ID_PORT_MDB,
 79         SWITCHDEV_OBJ_ID_HOST_MDB,
 80 };
 81 
 82 struct switchdev_obj {
 83         struct net_device *orig_dev;
 84         enum switchdev_obj_id id;
 85         u32 flags;
 86         void *complete_priv;
 87         void (*complete)(struct net_device *dev, int err, void *priv);
 88 };
 89 
 90 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
 91 struct switchdev_obj_port_vlan {
 92         struct switchdev_obj obj;
 93         u16 flags;
 94         u16 vid_begin;
 95         u16 vid_end;
 96 };
 97 
 98 #define SWITCHDEV_OBJ_PORT_VLAN(obj) \
 99         container_of(obj, struct switchdev_obj_port_vlan, obj)
100 
101 /* SWITCHDEV_OBJ_ID_PORT_MDB */
102 struct switchdev_obj_port_mdb {
103         struct switchdev_obj obj;
104         unsigned char addr[ETH_ALEN];
105         u16 vid;
106 };
107 
108 #define SWITCHDEV_OBJ_PORT_MDB(obj) \
109         container_of(obj, struct switchdev_obj_port_mdb, obj)
110 
111 void switchdev_trans_item_enqueue(struct switchdev_trans *trans,
112                                   void *data, void (*destructor)(void const *),
113                                   struct switchdev_trans_item *tritem);
114 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans);
115 
116 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
117 
118 /**
119  * struct switchdev_ops - switchdev operations
120  *
121  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
122  *
123  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
124  *
125  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj_*).
126  *
127  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj_*).
128  */
129 struct switchdev_ops {
130         int     (*switchdev_port_attr_get)(struct net_device *dev,
131                                            struct switchdev_attr *attr);
132         int     (*switchdev_port_attr_set)(struct net_device *dev,
133                                            const struct switchdev_attr *attr,
134                                            struct switchdev_trans *trans);
135         int     (*switchdev_port_obj_add)(struct net_device *dev,
136                                           const struct switchdev_obj *obj,
137                                           struct switchdev_trans *trans);
138         int     (*switchdev_port_obj_del)(struct net_device *dev,
139                                           const struct switchdev_obj *obj);
140 };
141 
142 enum switchdev_notifier_type {
143         SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
144         SWITCHDEV_FDB_DEL_TO_BRIDGE,
145         SWITCHDEV_FDB_ADD_TO_DEVICE,
146         SWITCHDEV_FDB_DEL_TO_DEVICE,
147         SWITCHDEV_FDB_OFFLOADED,
148 };
149 
150 struct switchdev_notifier_info {
151         struct net_device *dev;
152 };
153 
154 struct switchdev_notifier_fdb_info {
155         struct switchdev_notifier_info info; /* must be first */
156         const unsigned char *addr;
157         u16 vid;
158         bool added_by_user;
159 };
160 
161 static inline struct net_device *
162 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
163 {
164         return info->dev;
165 }
166 
167 #ifdef CONFIG_NET_SWITCHDEV
168 
169 void switchdev_deferred_process(void);
170 int switchdev_port_attr_get(struct net_device *dev,
171                             struct switchdev_attr *attr);
172 int switchdev_port_attr_set(struct net_device *dev,
173                             const struct switchdev_attr *attr);
174 int switchdev_port_obj_add(struct net_device *dev,
175                            const struct switchdev_obj *obj);
176 int switchdev_port_obj_del(struct net_device *dev,
177                            const struct switchdev_obj *obj);
178 int register_switchdev_notifier(struct notifier_block *nb);
179 int unregister_switchdev_notifier(struct notifier_block *nb);
180 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
181                              struct switchdev_notifier_info *info);
182 void switchdev_port_fwd_mark_set(struct net_device *dev,
183                                  struct net_device *group_dev,
184                                  bool joining);
185 
186 bool switchdev_port_same_parent_id(struct net_device *a,
187                                    struct net_device *b);
188 
189 #define SWITCHDEV_SET_OPS(netdev, ops) ((netdev)->switchdev_ops = (ops))
190 #else
191 
192 static inline void switchdev_deferred_process(void)
193 {
194 }
195 
196 static inline int switchdev_port_attr_get(struct net_device *dev,
197                                           struct switchdev_attr *attr)
198 {
199         return -EOPNOTSUPP;
200 }
201 
202 static inline int switchdev_port_attr_set(struct net_device *dev,
203                                           const struct switchdev_attr *attr)
204 {
205         return -EOPNOTSUPP;
206 }
207 
208 static inline int switchdev_port_obj_add(struct net_device *dev,
209                                          const struct switchdev_obj *obj)
210 {
211         return -EOPNOTSUPP;
212 }
213 
214 static inline int switchdev_port_obj_del(struct net_device *dev,
215                                          const struct switchdev_obj *obj)
216 {
217         return -EOPNOTSUPP;
218 }
219 
220 static inline int register_switchdev_notifier(struct notifier_block *nb)
221 {
222         return 0;
223 }
224 
225 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
226 {
227         return 0;
228 }
229 
230 static inline int call_switchdev_notifiers(unsigned long val,
231                                            struct net_device *dev,
232                                            struct switchdev_notifier_info *info)
233 {
234         return NOTIFY_DONE;
235 }
236 
237 static inline bool switchdev_port_same_parent_id(struct net_device *a,
238                                                  struct net_device *b)
239 {
240         return false;
241 }
242 
243 #define SWITCHDEV_SET_OPS(netdev, ops) do {} while (0)
244 
245 #endif
246 
247 #endif /* _LINUX_SWITCHDEV_H_ */
248 

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