include/net/switchdev.h

   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
  18 #define SWITCHDEV_F_NO_RECURSE          BIT(0)
  19
  20 struct switchdev_trans_item {
  21         struct list_head list;
  22         void *data;
  23         void (*destructor)(const void *data);
  24 };
  25
  26 struct switchdev_trans {
  27         struct list_head item_list;
  28         bool ph_prepare;
  29 };
  30
  31 static inline bool switchdev_trans_ph_prepare(struct switchdev_trans *trans)
  32 {
  33         return trans && trans->ph_prepare;
  34 }
  35
  36 static inline bool switchdev_trans_ph_commit(struct switchdev_trans *trans)
  37 {
  38         return trans && !trans->ph_prepare;
  39 }
  40
  41 enum switchdev_attr_id {
  42         SWITCHDEV_ATTR_ID_UNDEFINED,
  43         SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
  44         SWITCHDEV_ATTR_ID_PORT_STP_STATE,
  45         SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
  46 };
  47
  48 struct switchdev_attr {
  49         enum switchdev_attr_id id;
  50         u32 flags;
  51         union {
  52                 struct netdev_phys_item_id ppid;        /* PORT_PARENT_ID */
  53                 u8 stp_state;                           /* PORT_STP_STATE */
  54                 unsigned long brport_flags;             /* PORT_BRIDGE_FLAGS */
  55         } u;
  56 };
  57
  58 struct fib_info;
  59
  60 enum switchdev_obj_id {
  61         SWITCHDEV_OBJ_ID_UNDEFINED,
  62         SWITCHDEV_OBJ_ID_PORT_VLAN,
  63         SWITCHDEV_OBJ_ID_IPV4_FIB,
  64         SWITCHDEV_OBJ_ID_PORT_FDB,
  65 };
  66
  67 struct switchdev_obj {
  68         enum switchdev_obj_id id;
  69 };
  70
  71 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
  72 struct switchdev_obj_port_vlan {
  73         struct switchdev_obj obj;
  74         u16 flags;
  75         u16 vid_begin;
  76         u16 vid_end;
  77 };
  78
  79 #define SWITCHDEV_OBJ_PORT_VLAN(obj) \
  80         container_of(obj, struct switchdev_obj_port_vlan, obj)
  81
  82 /* SWITCHDEV_OBJ_ID_IPV4_FIB */
  83 struct switchdev_obj_ipv4_fib {
  84         struct switchdev_obj obj;
  85         u32 dst;
  86         int dst_len;
  87         struct fib_info *fi;
  88         u8 tos;
  89         u8 type;
  90         u32 nlflags;
  91         u32 tb_id;
  92 };
  93
  94 #define SWITCHDEV_OBJ_IPV4_FIB(obj) \
  95         container_of(obj, struct switchdev_obj_ipv4_fib, obj)
  96
  97 /* SWITCHDEV_OBJ_ID_PORT_FDB */
  98 struct switchdev_obj_port_fdb {
  99         struct switchdev_obj obj;
 100         const unsigned char *addr;
 101         u16 vid;
 102         u16 ndm_state;
 103 };
 104
 105 #define SWITCHDEV_OBJ_PORT_FDB(obj) \
 106         container_of(obj, struct switchdev_obj_port_fdb, obj)
 107
 108 void switchdev_trans_item_enqueue(struct switchdev_trans *trans,
 109                                   void *data, void (*destructor)(void const *),
 110                                   struct switchdev_trans_item *tritem);
 111 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans);
 112
 113 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
 114
 115 /**
 116  * struct switchdev_ops - switchdev operations
 117  *
 118  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
 119  *
 120  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
 121  *
 122  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj_*).
 123  *
 124  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj_*).
 125  *
 126  * @switchdev_port_obj_dump: Dump port objects (see switchdev_obj_*).
 127  */
 128 struct switchdev_ops {
 129         int     (*switchdev_port_attr_get)(struct net_device *dev,
 130                                            struct switchdev_attr *attr);
 131         int     (*switchdev_port_attr_set)(struct net_device *dev,
 132                                            struct switchdev_attr *attr,
 133                                            struct switchdev_trans *trans);
 134         int     (*switchdev_port_obj_add)(struct net_device *dev,
 135                                           const struct switchdev_obj *obj,
 136                                           struct switchdev_trans *trans);
 137         int     (*switchdev_port_obj_del)(struct net_device *dev,
 138                                           const struct switchdev_obj *obj);
 139         int     (*switchdev_port_obj_dump)(struct net_device *dev,
 140                                            struct switchdev_obj *obj,
 141                                            switchdev_obj_dump_cb_t *cb);
 142 };
 143
 144 enum switchdev_notifier_type {
 145         SWITCHDEV_FDB_ADD = 1,
 146         SWITCHDEV_FDB_DEL,
 147 };
 148
 149 struct switchdev_notifier_info {
 150         struct net_device *dev;
 151 };
 152
 153 struct switchdev_notifier_fdb_info {
 154         struct switchdev_notifier_info info; /* must be first */
 155         const unsigned char *addr;
 156         u16 vid;
 157 };
 158
 159 static inline struct net_device *
 160 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 161 {
 162         return info->dev;
 163 }
 164
 165 #ifdef CONFIG_NET_SWITCHDEV
 166
 167 int switchdev_port_attr_get(struct net_device *dev,
 168                             struct switchdev_attr *attr);
 169 int switchdev_port_attr_set(struct net_device *dev,
 170                             struct switchdev_attr *attr);
 171 int switchdev_port_obj_add(struct net_device *dev,
 172                            const struct switchdev_obj *obj);
 173 int switchdev_port_obj_del(struct net_device *dev,
 174                            const struct switchdev_obj *obj);
 175 int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj,
 176                             switchdev_obj_dump_cb_t *cb);
 177 int register_switchdev_notifier(struct notifier_block *nb);
 178 int unregister_switchdev_notifier(struct notifier_block *nb);
 179 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 180                              struct switchdev_notifier_info *info);
 181 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 182                                   struct net_device *dev, u32 filter_mask,
 183                                   int nlflags);
 184 int switchdev_port_bridge_setlink(struct net_device *dev,
 185                                   struct nlmsghdr *nlh, u16 flags);
 186 int switchdev_port_bridge_dellink(struct net_device *dev,
 187                                   struct nlmsghdr *nlh, u16 flags);
 188 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 189                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 190 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 191                            u8 tos, u8 type, u32 tb_id);
 192 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 193 int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 194                            struct net_device *dev, const unsigned char *addr,
 195                            u16 vid, u16 nlm_flags);
 196 int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 197                            struct net_device *dev, const unsigned char *addr,
 198                            u16 vid);
 199 int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 200                             struct net_device *dev,
 201                             struct net_device *filter_dev, int idx);
 202 void switchdev_port_fwd_mark_set(struct net_device *dev,
 203                                  struct net_device *group_dev,
 204                                  bool joining);
 205
 206 #else
 207
 208 static inline int switchdev_port_attr_get(struct net_device *dev,
 209                                           struct switchdev_attr *attr)
 210 {
 211         return -EOPNOTSUPP;
 212 }
 213
 214 static inline int switchdev_port_attr_set(struct net_device *dev,
 215                                           struct switchdev_attr *attr)
 216 {
 217         return -EOPNOTSUPP;
 218 }
 219
 220 static inline int switchdev_port_obj_add(struct net_device *dev,
 221                                          const struct switchdev_obj *obj)
 222 {
 223         return -EOPNOTSUPP;
 224 }
 225
 226 static inline int switchdev_port_obj_del(struct net_device *dev,
 227                                          const struct switchdev_obj *obj)
 228 {
 229         return -EOPNOTSUPP;
 230 }
 231
 232 static inline int switchdev_port_obj_dump(struct net_device *dev,
 233                                           const struct switchdev_obj *obj,
 234                                           switchdev_obj_dump_cb_t *cb)
 235 {
 236         return -EOPNOTSUPP;
 237 }
 238
 239 static inline int register_switchdev_notifier(struct notifier_block *nb)
 240 {
 241         return 0;
 242 }
 243
 244 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 245 {
 246         return 0;
 247 }
 248
 249 static inline int call_switchdev_notifiers(unsigned long val,
 250                                            struct net_device *dev,
 251                                            struct switchdev_notifier_info *info)
 252 {
 253         return NOTIFY_DONE;
 254 }
 255
 256 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
 257                                             u32 seq, struct net_device *dev,
 258                                             u32 filter_mask, int nlflags)
 259 {
 260         return -EOPNOTSUPP;
 261 }
 262
 263 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 264                                                 struct nlmsghdr *nlh,
 265                                                 u16 flags)
 266 {
 267         return -EOPNOTSUPP;
 268 }
 269
 270 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 271                                                 struct nlmsghdr *nlh,
 272                                                 u16 flags)
 273 {
 274         return -EOPNOTSUPP;
 275 }
 276
 277 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 278                                          struct fib_info *fi,
 279                                          u8 tos, u8 type,
 280                                          u32 nlflags, u32 tb_id)
 281 {
 282         return 0;
 283 }
 284
 285 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 286                                          struct fib_info *fi,
 287                                          u8 tos, u8 type, u32 tb_id)
 288 {
 289         return 0;
 290 }
 291
 292 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 293 {
 294 }
 295
 296 static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 297                                          struct net_device *dev,
 298                                          const unsigned char *addr,
 299                                          u16 vid, u16 nlm_flags)
 300 {
 301         return -EOPNOTSUPP;
 302 }
 303
 304 static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 305                                          struct net_device *dev,
 306                                          const unsigned char *addr, u16 vid)
 307 {
 308         return -EOPNOTSUPP;
 309 }
 310
 311 static inline int switchdev_port_fdb_dump(struct sk_buff *skb,
 312                                           struct netlink_callback *cb,
 313                                           struct net_device *dev,
 314                                           struct net_device *filter_dev,
 315                                           int idx)
 316 {
 317         return -EOPNOTSUPP;
 318 }
 319
 320 static inline void switchdev_port_fwd_mark_set(struct net_device *dev,
 321                                                struct net_device *group_dev,
 322                                                bool joining)
 323 {
 324 }
 325
 326 #endif
 327
 328 #endif /* _LINUX_SWITCHDEV_H_ */