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_MROUTER, 50 SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME, 51 SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 52 SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, 53 }; 54 55 struct switchdev_attr { 56 struct net_device *orig_dev; 57 enum switchdev_attr_id id; 58 u32 flags; 59 void *complete_priv; 60 void (*complete)(struct net_device *dev, int err, void *priv); 61 union { 62 struct netdev_phys_item_id ppid; /* PORT_PARENT_ID */ 63 u8 stp_state; /* PORT_STP_STATE */ 64 unsigned long brport_flags; /* PORT_BRIDGE_FLAGS */ 65 bool mrouter; /* PORT_MROUTER */ 66 clock_t ageing_time; /* BRIDGE_AGEING_TIME */ 67 bool vlan_filtering; /* BRIDGE_VLAN_FILTERING */ 68 bool mc_disabled; /* MC_DISABLED */ 69 } u; 70 }; 71 72 enum switchdev_obj_id { 73 SWITCHDEV_OBJ_ID_UNDEFINED, 74 SWITCHDEV_OBJ_ID_PORT_VLAN, 75 SWITCHDEV_OBJ_ID_PORT_FDB, 76 SWITCHDEV_OBJ_ID_PORT_MDB, 77 }; 78 79 struct switchdev_obj { 80 struct net_device *orig_dev; 81 enum switchdev_obj_id id; 82 u32 flags; 83 void *complete_priv; 84 void (*complete)(struct net_device *dev, int err, void *priv); 85 }; 86 87 /* SWITCHDEV_OBJ_ID_PORT_VLAN */ 88 struct switchdev_obj_port_vlan { 89 struct switchdev_obj obj; 90 u16 flags; 91 u16 vid_begin; 92 u16 vid_end; 93 }; 94 95 #define SWITCHDEV_OBJ_PORT_VLAN(obj) \ 96 container_of(obj, struct switchdev_obj_port_vlan, obj) 97 98 /* SWITCHDEV_OBJ_ID_PORT_FDB */ 99 struct switchdev_obj_port_fdb { 100 struct switchdev_obj obj; 101 unsigned char addr[ETH_ALEN]; 102 u16 vid; 103 u16 ndm_state; 104 }; 105 106 #define SWITCHDEV_OBJ_PORT_FDB(obj) \ 107 container_of(obj, struct switchdev_obj_port_fdb, obj) 108 109 /* SWITCHDEV_OBJ_ID_PORT_MDB */ 110 struct switchdev_obj_port_mdb { 111 struct switchdev_obj obj; 112 unsigned char addr[ETH_ALEN]; 113 u16 vid; 114 }; 115 116 #define SWITCHDEV_OBJ_PORT_MDB(obj) \ 117 container_of(obj, struct switchdev_obj_port_mdb, obj) 118 119 void switchdev_trans_item_enqueue(struct switchdev_trans *trans, 120 void *data, void (*destructor)(void const *), 121 struct switchdev_trans_item *tritem); 122 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans); 123 124 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj); 125 126 /** 127 * struct switchdev_ops - switchdev operations 128 * 129 * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr). 130 * 131 * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr). 132 * 133 * @switchdev_port_obj_add: Add an object to port (see switchdev_obj_*). 134 * 135 * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj_*). 136 * 137 * @switchdev_port_obj_dump: Dump port objects (see switchdev_obj_*). 138 */ 139 struct switchdev_ops { 140 int (*switchdev_port_attr_get)(struct net_device *dev, 141 struct switchdev_attr *attr); 142 int (*switchdev_port_attr_set)(struct net_device *dev, 143 const struct switchdev_attr *attr, 144 struct switchdev_trans *trans); 145 int (*switchdev_port_obj_add)(struct net_device *dev, 146 const struct switchdev_obj *obj, 147 struct switchdev_trans *trans); 148 int (*switchdev_port_obj_del)(struct net_device *dev, 149 const struct switchdev_obj *obj); 150 int (*switchdev_port_obj_dump)(struct net_device *dev, 151 struct switchdev_obj *obj, 152 switchdev_obj_dump_cb_t *cb); 153 }; 154 155 enum switchdev_notifier_type { 156 SWITCHDEV_FDB_ADD = 1, 157 SWITCHDEV_FDB_DEL, 158 }; 159 160 struct switchdev_notifier_info { 161 struct net_device *dev; 162 }; 163 164 struct switchdev_notifier_fdb_info { 165 struct switchdev_notifier_info info; /* must be first */ 166 const unsigned char *addr; 167 u16 vid; 168 }; 169 170 static inline struct net_device * 171 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info) 172 { 173 return info->dev; 174 } 175 176 #ifdef CONFIG_NET_SWITCHDEV 177 178 void switchdev_deferred_process(void); 179 int switchdev_port_attr_get(struct net_device *dev, 180 struct switchdev_attr *attr); 181 int switchdev_port_attr_set(struct net_device *dev, 182 const struct switchdev_attr *attr); 183 int switchdev_port_obj_add(struct net_device *dev, 184 const struct switchdev_obj *obj); 185 int switchdev_port_obj_del(struct net_device *dev, 186 const struct switchdev_obj *obj); 187 int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj, 188 switchdev_obj_dump_cb_t *cb); 189 int register_switchdev_notifier(struct notifier_block *nb); 190 int unregister_switchdev_notifier(struct notifier_block *nb); 191 int call_switchdev_notifiers(unsigned long val, struct net_device *dev, 192 struct switchdev_notifier_info *info); 193 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 194 struct net_device *dev, u32 filter_mask, 195 int nlflags); 196 int switchdev_port_bridge_setlink(struct net_device *dev, 197 struct nlmsghdr *nlh, u16 flags); 198 int switchdev_port_bridge_dellink(struct net_device *dev, 199 struct nlmsghdr *nlh, u16 flags); 200 int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 201 struct net_device *dev, const unsigned char *addr, 202 u16 vid, u16 nlm_flags); 203 int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 204 struct net_device *dev, const unsigned char *addr, 205 u16 vid); 206 int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 207 struct net_device *dev, 208 struct net_device *filter_dev, int *idx); 209 void switchdev_port_fwd_mark_set(struct net_device *dev, 210 struct net_device *group_dev, 211 bool joining); 212 213 bool switchdev_port_same_parent_id(struct net_device *a, 214 struct net_device *b); 215 #else 216 217 static inline void switchdev_deferred_process(void) 218 { 219 } 220 221 static inline int switchdev_port_attr_get(struct net_device *dev, 222 struct switchdev_attr *attr) 223 { 224 return -EOPNOTSUPP; 225 } 226 227 static inline int switchdev_port_attr_set(struct net_device *dev, 228 const struct switchdev_attr *attr) 229 { 230 return -EOPNOTSUPP; 231 } 232 233 static inline int switchdev_port_obj_add(struct net_device *dev, 234 const struct switchdev_obj *obj) 235 { 236 return -EOPNOTSUPP; 237 } 238 239 static inline int switchdev_port_obj_del(struct net_device *dev, 240 const struct switchdev_obj *obj) 241 { 242 return -EOPNOTSUPP; 243 } 244 245 static inline int switchdev_port_obj_dump(struct net_device *dev, 246 const struct switchdev_obj *obj, 247 switchdev_obj_dump_cb_t *cb) 248 { 249 return -EOPNOTSUPP; 250 } 251 252 static inline int register_switchdev_notifier(struct notifier_block *nb) 253 { 254 return 0; 255 } 256 257 static inline int unregister_switchdev_notifier(struct notifier_block *nb) 258 { 259 return 0; 260 } 261 262 static inline int call_switchdev_notifiers(unsigned long val, 263 struct net_device *dev, 264 struct switchdev_notifier_info *info) 265 { 266 return NOTIFY_DONE; 267 } 268 269 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, 270 u32 seq, struct net_device *dev, 271 u32 filter_mask, int nlflags) 272 { 273 return -EOPNOTSUPP; 274 } 275 276 static inline int switchdev_port_bridge_setlink(struct net_device *dev, 277 struct nlmsghdr *nlh, 278 u16 flags) 279 { 280 return -EOPNOTSUPP; 281 } 282 283 static inline int switchdev_port_bridge_dellink(struct net_device *dev, 284 struct nlmsghdr *nlh, 285 u16 flags) 286 { 287 return -EOPNOTSUPP; 288 } 289 290 static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 291 struct net_device *dev, 292 const unsigned char *addr, 293 u16 vid, u16 nlm_flags) 294 { 295 return -EOPNOTSUPP; 296 } 297 298 static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 299 struct net_device *dev, 300 const unsigned char *addr, u16 vid) 301 { 302 return -EOPNOTSUPP; 303 } 304 305 static inline int switchdev_port_fdb_dump(struct sk_buff *skb, 306 struct netlink_callback *cb, 307 struct net_device *dev, 308 struct net_device *filter_dev, 309 int *idx) 310 { 311 return *idx; 312 } 313 314 static inline bool switchdev_port_same_parent_id(struct net_device *a, 315 struct net_device *b) 316 { 317 return false; 318 } 319 320 #endif 321 322 #endif /* _LINUX_SWITCHDEV_H_ */ 323