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_BRIDGE_AGEING_TIME, 50 SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 51 }; 52 53 struct switchdev_attr { 54 struct net_device *orig_dev; 55 enum switchdev_attr_id id; 56 u32 flags; 57 void *complete_priv; 58 void (*complete)(struct net_device *dev, int err, void *priv); 59 union { 60 struct netdev_phys_item_id ppid; /* PORT_PARENT_ID */ 61 u8 stp_state; /* PORT_STP_STATE */ 62 unsigned long brport_flags; /* PORT_BRIDGE_FLAGS */ 63 clock_t ageing_time; /* BRIDGE_AGEING_TIME */ 64 bool vlan_filtering; /* BRIDGE_VLAN_FILTERING */ 65 } u; 66 }; 67 68 enum switchdev_obj_id { 69 SWITCHDEV_OBJ_ID_UNDEFINED, 70 SWITCHDEV_OBJ_ID_PORT_VLAN, 71 SWITCHDEV_OBJ_ID_PORT_FDB, 72 SWITCHDEV_OBJ_ID_PORT_MDB, 73 }; 74 75 struct switchdev_obj { 76 struct net_device *orig_dev; 77 enum switchdev_obj_id id; 78 u32 flags; 79 void *complete_priv; 80 void (*complete)(struct net_device *dev, int err, void *priv); 81 }; 82 83 /* SWITCHDEV_OBJ_ID_PORT_VLAN */ 84 struct switchdev_obj_port_vlan { 85 struct switchdev_obj obj; 86 u16 flags; 87 u16 vid_begin; 88 u16 vid_end; 89 }; 90 91 #define SWITCHDEV_OBJ_PORT_VLAN(obj) \ 92 container_of(obj, struct switchdev_obj_port_vlan, obj) 93 94 /* SWITCHDEV_OBJ_ID_PORT_FDB */ 95 struct switchdev_obj_port_fdb { 96 struct switchdev_obj obj; 97 unsigned char addr[ETH_ALEN]; 98 u16 vid; 99 u16 ndm_state; 100 }; 101 102 #define SWITCHDEV_OBJ_PORT_FDB(obj) \ 103 container_of(obj, struct switchdev_obj_port_fdb, obj) 104 105 /* SWITCHDEV_OBJ_ID_PORT_MDB */ 106 struct switchdev_obj_port_mdb { 107 struct switchdev_obj obj; 108 unsigned char addr[ETH_ALEN]; 109 u16 vid; 110 }; 111 112 #define SWITCHDEV_OBJ_PORT_MDB(obj) \ 113 container_of(obj, struct switchdev_obj_port_mdb, obj) 114 115 void switchdev_trans_item_enqueue(struct switchdev_trans *trans, 116 void *data, void (*destructor)(void const *), 117 struct switchdev_trans_item *tritem); 118 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans); 119 120 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj); 121 122 /** 123 * struct switchdev_ops - switchdev operations 124 * 125 * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr). 126 * 127 * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr). 128 * 129 * @switchdev_port_obj_add: Add an object to port (see switchdev_obj_*). 130 * 131 * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj_*). 132 * 133 * @switchdev_port_obj_dump: Dump port objects (see switchdev_obj_*). 134 */ 135 struct switchdev_ops { 136 int (*switchdev_port_attr_get)(struct net_device *dev, 137 struct switchdev_attr *attr); 138 int (*switchdev_port_attr_set)(struct net_device *dev, 139 const struct switchdev_attr *attr, 140 struct switchdev_trans *trans); 141 int (*switchdev_port_obj_add)(struct net_device *dev, 142 const struct switchdev_obj *obj, 143 struct switchdev_trans *trans); 144 int (*switchdev_port_obj_del)(struct net_device *dev, 145 const struct switchdev_obj *obj); 146 int (*switchdev_port_obj_dump)(struct net_device *dev, 147 struct switchdev_obj *obj, 148 switchdev_obj_dump_cb_t *cb); 149 }; 150 151 enum switchdev_notifier_type { 152 SWITCHDEV_FDB_ADD = 1, 153 SWITCHDEV_FDB_DEL, 154 }; 155 156 struct switchdev_notifier_info { 157 struct net_device *dev; 158 }; 159 160 struct switchdev_notifier_fdb_info { 161 struct switchdev_notifier_info info; /* must be first */ 162 const unsigned char *addr; 163 u16 vid; 164 }; 165 166 static inline struct net_device * 167 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info) 168 { 169 return info->dev; 170 } 171 172 #ifdef CONFIG_NET_SWITCHDEV 173 174 void switchdev_deferred_process(void); 175 int switchdev_port_attr_get(struct net_device *dev, 176 struct switchdev_attr *attr); 177 int switchdev_port_attr_set(struct net_device *dev, 178 const struct switchdev_attr *attr); 179 int switchdev_port_obj_add(struct net_device *dev, 180 const struct switchdev_obj *obj); 181 int switchdev_port_obj_del(struct net_device *dev, 182 const struct switchdev_obj *obj); 183 int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj, 184 switchdev_obj_dump_cb_t *cb); 185 int register_switchdev_notifier(struct notifier_block *nb); 186 int unregister_switchdev_notifier(struct notifier_block *nb); 187 int call_switchdev_notifiers(unsigned long val, struct net_device *dev, 188 struct switchdev_notifier_info *info); 189 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 190 struct net_device *dev, u32 filter_mask, 191 int nlflags); 192 int switchdev_port_bridge_setlink(struct net_device *dev, 193 struct nlmsghdr *nlh, u16 flags); 194 int switchdev_port_bridge_dellink(struct net_device *dev, 195 struct nlmsghdr *nlh, u16 flags); 196 int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 197 struct net_device *dev, const unsigned char *addr, 198 u16 vid, u16 nlm_flags); 199 int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 200 struct net_device *dev, const unsigned char *addr, 201 u16 vid); 202 int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 203 struct net_device *dev, 204 struct net_device *filter_dev, int *idx); 205 void switchdev_port_fwd_mark_set(struct net_device *dev, 206 struct net_device *group_dev, 207 bool joining); 208 209 bool switchdev_port_same_parent_id(struct net_device *a, 210 struct net_device *b); 211 #else 212 213 static inline void switchdev_deferred_process(void) 214 { 215 } 216 217 static inline int switchdev_port_attr_get(struct net_device *dev, 218 struct switchdev_attr *attr) 219 { 220 return -EOPNOTSUPP; 221 } 222 223 static inline int switchdev_port_attr_set(struct net_device *dev, 224 const struct switchdev_attr *attr) 225 { 226 return -EOPNOTSUPP; 227 } 228 229 static inline int switchdev_port_obj_add(struct net_device *dev, 230 const struct switchdev_obj *obj) 231 { 232 return -EOPNOTSUPP; 233 } 234 235 static inline int switchdev_port_obj_del(struct net_device *dev, 236 const struct switchdev_obj *obj) 237 { 238 return -EOPNOTSUPP; 239 } 240 241 static inline int switchdev_port_obj_dump(struct net_device *dev, 242 const struct switchdev_obj *obj, 243 switchdev_obj_dump_cb_t *cb) 244 { 245 return -EOPNOTSUPP; 246 } 247 248 static inline int register_switchdev_notifier(struct notifier_block *nb) 249 { 250 return 0; 251 } 252 253 static inline int unregister_switchdev_notifier(struct notifier_block *nb) 254 { 255 return 0; 256 } 257 258 static inline int call_switchdev_notifiers(unsigned long val, 259 struct net_device *dev, 260 struct switchdev_notifier_info *info) 261 { 262 return NOTIFY_DONE; 263 } 264 265 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, 266 u32 seq, struct net_device *dev, 267 u32 filter_mask, int nlflags) 268 { 269 return -EOPNOTSUPP; 270 } 271 272 static inline int switchdev_port_bridge_setlink(struct net_device *dev, 273 struct nlmsghdr *nlh, 274 u16 flags) 275 { 276 return -EOPNOTSUPP; 277 } 278 279 static inline int switchdev_port_bridge_dellink(struct net_device *dev, 280 struct nlmsghdr *nlh, 281 u16 flags) 282 { 283 return -EOPNOTSUPP; 284 } 285 286 static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 287 struct net_device *dev, 288 const unsigned char *addr, 289 u16 vid, u16 nlm_flags) 290 { 291 return -EOPNOTSUPP; 292 } 293 294 static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 295 struct net_device *dev, 296 const unsigned char *addr, u16 vid) 297 { 298 return -EOPNOTSUPP; 299 } 300 301 static inline int switchdev_port_fdb_dump(struct sk_buff *skb, 302 struct netlink_callback *cb, 303 struct net_device *dev, 304 struct net_device *filter_dev, 305 int *idx) 306 { 307 return *idx; 308 } 309 310 static inline bool switchdev_port_same_parent_id(struct net_device *a, 311 struct net_device *b) 312 { 313 return false; 314 } 315 316 #endif 317 318 #endif /* _LINUX_SWITCHDEV_H_ */ 319