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 { 24 bool ph_prepare; 25 }; 26 27 static inline bool switchdev_trans_ph_prepare(struct switchdev_trans *trans) 28 { 29 return trans && trans->ph_prepare; 30 } 31 32 static inline bool switchdev_trans_ph_commit(struct switchdev_trans *trans) 33 { 34 return trans && !trans->ph_prepare; 35 } 36 37 enum switchdev_attr_id { 38 SWITCHDEV_ATTR_ID_UNDEFINED, 39 SWITCHDEV_ATTR_ID_PORT_STP_STATE, 40 SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS, 41 SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS, 42 SWITCHDEV_ATTR_ID_PORT_MROUTER, 43 SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME, 44 SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 45 SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, 46 SWITCHDEV_ATTR_ID_BRIDGE_MROUTER, 47 }; 48 49 struct switchdev_attr { 50 struct net_device *orig_dev; 51 enum switchdev_attr_id id; 52 u32 flags; 53 void *complete_priv; 54 void (*complete)(struct net_device *dev, int err, void *priv); 55 union { 56 u8 stp_state; /* PORT_STP_STATE */ 57 unsigned long brport_flags; /* PORT_{PRE}_BRIDGE_FLAGS */ 58 bool mrouter; /* PORT_MROUTER */ 59 clock_t ageing_time; /* BRIDGE_AGEING_TIME */ 60 bool vlan_filtering; /* BRIDGE_VLAN_FILTERING */ 61 bool mc_disabled; /* MC_DISABLED */ 62 } u; 63 }; 64 65 enum switchdev_obj_id { 66 SWITCHDEV_OBJ_ID_UNDEFINED, 67 SWITCHDEV_OBJ_ID_PORT_VLAN, 68 SWITCHDEV_OBJ_ID_PORT_MDB, 69 SWITCHDEV_OBJ_ID_HOST_MDB, 70 }; 71 72 struct switchdev_obj { 73 struct net_device *orig_dev; 74 enum switchdev_obj_id id; 75 u32 flags; 76 void *complete_priv; 77 void (*complete)(struct net_device *dev, int err, void *priv); 78 }; 79 80 /* SWITCHDEV_OBJ_ID_PORT_VLAN */ 81 struct switchdev_obj_port_vlan { 82 struct switchdev_obj obj; 83 u16 flags; 84 u16 vid_begin; 85 u16 vid_end; 86 }; 87 88 #define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \ 89 container_of((OBJ), struct switchdev_obj_port_vlan, obj) 90 91 /* SWITCHDEV_OBJ_ID_PORT_MDB */ 92 struct switchdev_obj_port_mdb { 93 struct switchdev_obj obj; 94 unsigned char addr[ETH_ALEN]; 95 u16 vid; 96 }; 97 98 #define SWITCHDEV_OBJ_PORT_MDB(OBJ) \ 99 container_of((OBJ), struct switchdev_obj_port_mdb, obj) 100 101 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj); 102 103 enum switchdev_notifier_type { 104 SWITCHDEV_FDB_ADD_TO_BRIDGE = 1, 105 SWITCHDEV_FDB_DEL_TO_BRIDGE, 106 SWITCHDEV_FDB_ADD_TO_DEVICE, 107 SWITCHDEV_FDB_DEL_TO_DEVICE, 108 SWITCHDEV_FDB_OFFLOADED, 109 110 SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */ 111 SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */ 112 SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */ 113 114 SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE, 115 SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE, 116 SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE, 117 SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE, 118 SWITCHDEV_VXLAN_FDB_OFFLOADED, 119 }; 120 121 struct switchdev_notifier_info { 122 struct net_device *dev; 123 struct netlink_ext_ack *extack; 124 }; 125 126 struct switchdev_notifier_fdb_info { 127 struct switchdev_notifier_info info; /* must be first */ 128 const unsigned char *addr; 129 u16 vid; 130 u8 added_by_user:1, 131 offloaded:1; 132 }; 133 134 struct switchdev_notifier_port_obj_info { 135 struct switchdev_notifier_info info; /* must be first */ 136 const struct switchdev_obj *obj; 137 struct switchdev_trans *trans; 138 bool handled; 139 }; 140 141 struct switchdev_notifier_port_attr_info { 142 struct switchdev_notifier_info info; /* must be first */ 143 const struct switchdev_attr *attr; 144 struct switchdev_trans *trans; 145 bool handled; 146 }; 147 148 static inline struct net_device * 149 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info) 150 { 151 return info->dev; 152 } 153 154 static inline struct netlink_ext_ack * 155 switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info) 156 { 157 return info->extack; 158 } 159 160 #ifdef CONFIG_NET_SWITCHDEV 161 162 void switchdev_deferred_process(void); 163 int switchdev_port_attr_set(struct net_device *dev, 164 const struct switchdev_attr *attr); 165 int switchdev_port_obj_add(struct net_device *dev, 166 const struct switchdev_obj *obj, 167 struct netlink_ext_ack *extack); 168 int switchdev_port_obj_del(struct net_device *dev, 169 const struct switchdev_obj *obj); 170 171 int register_switchdev_notifier(struct notifier_block *nb); 172 int unregister_switchdev_notifier(struct notifier_block *nb); 173 int call_switchdev_notifiers(unsigned long val, struct net_device *dev, 174 struct switchdev_notifier_info *info, 175 struct netlink_ext_ack *extack); 176 177 int register_switchdev_blocking_notifier(struct notifier_block *nb); 178 int unregister_switchdev_blocking_notifier(struct notifier_block *nb); 179 int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev, 180 struct switchdev_notifier_info *info, 181 struct netlink_ext_ack *extack); 182 183 void switchdev_port_fwd_mark_set(struct net_device *dev, 184 struct net_device *group_dev, 185 bool joining); 186 187 int switchdev_handle_port_obj_add(struct net_device *dev, 188 struct switchdev_notifier_port_obj_info *port_obj_info, 189 bool (*check_cb)(const struct net_device *dev), 190 int (*add_cb)(struct net_device *dev, 191 const struct switchdev_obj *obj, 192 struct switchdev_trans *trans, 193 struct netlink_ext_ack *extack)); 194 int switchdev_handle_port_obj_del(struct net_device *dev, 195 struct switchdev_notifier_port_obj_info *port_obj_info, 196 bool (*check_cb)(const struct net_device *dev), 197 int (*del_cb)(struct net_device *dev, 198 const struct switchdev_obj *obj)); 199 200 int switchdev_handle_port_attr_set(struct net_device *dev, 201 struct switchdev_notifier_port_attr_info *port_attr_info, 202 bool (*check_cb)(const struct net_device *dev), 203 int (*set_cb)(struct net_device *dev, 204 const struct switchdev_attr *attr, 205 struct switchdev_trans *trans)); 206 #else 207 208 static inline void switchdev_deferred_process(void) 209 { 210 } 211 212 static inline int switchdev_port_attr_set(struct net_device *dev, 213 const struct switchdev_attr *attr) 214 { 215 return -EOPNOTSUPP; 216 } 217 218 static inline int switchdev_port_obj_add(struct net_device *dev, 219 const struct switchdev_obj *obj, 220 struct netlink_ext_ack *extack) 221 { 222 return -EOPNOTSUPP; 223 } 224 225 static inline int switchdev_port_obj_del(struct net_device *dev, 226 const struct switchdev_obj *obj) 227 { 228 return -EOPNOTSUPP; 229 } 230 231 static inline int register_switchdev_notifier(struct notifier_block *nb) 232 { 233 return 0; 234 } 235 236 static inline int unregister_switchdev_notifier(struct notifier_block *nb) 237 { 238 return 0; 239 } 240 241 static inline int call_switchdev_notifiers(unsigned long val, 242 struct net_device *dev, 243 struct switchdev_notifier_info *info, 244 struct netlink_ext_ack *extack) 245 { 246 return NOTIFY_DONE; 247 } 248 249 static inline int 250 register_switchdev_blocking_notifier(struct notifier_block *nb) 251 { 252 return 0; 253 } 254 255 static inline int 256 unregister_switchdev_blocking_notifier(struct notifier_block *nb) 257 { 258 return 0; 259 } 260 261 static inline int 262 call_switchdev_blocking_notifiers(unsigned long val, 263 struct net_device *dev, 264 struct switchdev_notifier_info *info, 265 struct netlink_ext_ack *extack) 266 { 267 return NOTIFY_DONE; 268 } 269 270 static inline int 271 switchdev_handle_port_obj_add(struct net_device *dev, 272 struct switchdev_notifier_port_obj_info *port_obj_info, 273 bool (*check_cb)(const struct net_device *dev), 274 int (*add_cb)(struct net_device *dev, 275 const struct switchdev_obj *obj, 276 struct switchdev_trans *trans, 277 struct netlink_ext_ack *extack)) 278 { 279 return 0; 280 } 281 282 static inline int 283 switchdev_handle_port_obj_del(struct net_device *dev, 284 struct switchdev_notifier_port_obj_info *port_obj_info, 285 bool (*check_cb)(const struct net_device *dev), 286 int (*del_cb)(struct net_device *dev, 287 const struct switchdev_obj *obj)) 288 { 289 return 0; 290 } 291 292 static inline int 293 switchdev_handle_port_attr_set(struct net_device *dev, 294 struct switchdev_notifier_port_attr_info *port_attr_info, 295 bool (*check_cb)(const struct net_device *dev), 296 int (*set_cb)(struct net_device *dev, 297 const struct switchdev_attr *attr, 298 struct switchdev_trans *trans)) 299 { 300 return 0; 301 } 302 #endif 303 304 #endif /* _LINUX_SWITCHDEV_H_ */ 305