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_UNDEFINED,
  43         SWITCHDEV_ATTR_PORT_PARENT_ID,
  44         SWITCHDEV_ATTR_PORT_STP_STATE,
  45         SWITCHDEV_ATTR_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_UNDEFINED,
  62         SWITCHDEV_OBJ_PORT_VLAN,
  63         SWITCHDEV_OBJ_IPV4_FIB,
  64         SWITCHDEV_OBJ_PORT_FDB,
  65 };
  66
  67 struct switchdev_obj {
  68         enum switchdev_obj_id id;
  69         int (*cb)(struct switchdev_obj *obj);
  70         union {
  71                 struct switchdev_obj_vlan {             /* PORT_VLAN */
  72                         u16 flags;
  73                         u16 vid_begin;
  74                         u16 vid_end;
  75                 } vlan;
  76                 struct switchdev_obj_ipv4_fib {         /* IPV4_FIB */
  77                         u32 dst;
  78                         int dst_len;
  79                         struct fib_info *fi;
  80                         u8 tos;
  81                         u8 type;
  82                         u32 nlflags;
  83                         u32 tb_id;
  84                 } ipv4_fib;
  85                 struct switchdev_obj_fdb {              /* PORT_FDB */
  86                         const unsigned char *addr;
  87                         u16 vid;
  88                         u16 ndm_state;
  89                 } fdb;
  90         } u;
  91 };
  92
  93 void switchdev_trans_item_enqueue(struct switchdev_trans *trans,
  94                                   void *data, void (*destructor)(void const *),
  95                                   struct switchdev_trans_item *tritem);
  96 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans);
  97
  98 /**
  99  * struct switchdev_ops - switchdev operations
 100  *
 101  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
 102  *
 103  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
 104  *
 105  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj).
 106  *
 107  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj).
 108  *
 109  * @switchdev_port_obj_dump: Dump port objects (see switchdev_obj).
 110  */
 111 struct switchdev_ops {
 112         int     (*switchdev_port_attr_get)(struct net_device *dev,
 113                                            struct switchdev_attr *attr);
 114         int     (*switchdev_port_attr_set)(struct net_device *dev,
 115                                            struct switchdev_attr *attr,
 116                                            struct switchdev_trans *trans);
 117         int     (*switchdev_port_obj_add)(struct net_device *dev,
 118                                           struct switchdev_obj *obj,
 119                                           struct switchdev_trans *trans);
 120         int     (*switchdev_port_obj_del)(struct net_device *dev,
 121                                           struct switchdev_obj *obj);
 122         int     (*switchdev_port_obj_dump)(struct net_device *dev,
 123                                            enum switchdev_obj_id id, void *obj,
 124                                            int (*cb)(void *obj));
 125 };
 126
 127 enum switchdev_notifier_type {
 128         SWITCHDEV_FDB_ADD = 1,
 129         SWITCHDEV_FDB_DEL,
 130 };
 131
 132 struct switchdev_notifier_info {
 133         struct net_device *dev;
 134 };
 135
 136 struct switchdev_notifier_fdb_info {
 137         struct switchdev_notifier_info info; /* must be first */
 138         const unsigned char *addr;
 139         u16 vid;
 140 };
 141
 142 static inline struct net_device *
 143 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 144 {
 145         return info->dev;
 146 }
 147
 148 #ifdef CONFIG_NET_SWITCHDEV
 149
 150 int switchdev_port_attr_get(struct net_device *dev,
 151                             struct switchdev_attr *attr);
 152 int switchdev_port_attr_set(struct net_device *dev,
 153                             struct switchdev_attr *attr);
 154 int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj);
 155 int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj);
 156 int switchdev_port_obj_dump(struct net_device *dev, enum switchdev_obj_id id,
 157                             void *obj, int (*cb)(void *obj));
 158 int register_switchdev_notifier(struct notifier_block *nb);
 159 int unregister_switchdev_notifier(struct notifier_block *nb);
 160 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 161                              struct switchdev_notifier_info *info);
 162 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 163                                   struct net_device *dev, u32 filter_mask,
 164                                   int nlflags);
 165 int switchdev_port_bridge_setlink(struct net_device *dev,
 166                                   struct nlmsghdr *nlh, u16 flags);
 167 int switchdev_port_bridge_dellink(struct net_device *dev,
 168                                   struct nlmsghdr *nlh, u16 flags);
 169 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 170                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 171 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 172                            u8 tos, u8 type, u32 tb_id);
 173 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 174 int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 175                            struct net_device *dev, const unsigned char *addr,
 176                            u16 vid, u16 nlm_flags);
 177 int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 178                            struct net_device *dev, const unsigned char *addr,
 179                            u16 vid);
 180 int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 181                             struct net_device *dev,
 182                             struct net_device *filter_dev, int idx);
 183 void switchdev_port_fwd_mark_set(struct net_device *dev,
 184                                  struct net_device *group_dev,
 185                                  bool joining);
 186
 187 #else
 188
 189 static inline int switchdev_port_attr_get(struct net_device *dev,
 190                                           struct switchdev_attr *attr)
 191 {
 192         return -EOPNOTSUPP;
 193 }
 194
 195 static inline int switchdev_port_attr_set(struct net_device *dev,
 196                                           struct switchdev_attr *attr)
 197 {
 198         return -EOPNOTSUPP;
 199 }
 200
 201 static inline int switchdev_port_obj_add(struct net_device *dev,
 202                                          struct switchdev_obj *obj)
 203 {
 204         return -EOPNOTSUPP;
 205 }
 206
 207 static inline int switchdev_port_obj_del(struct net_device *dev,
 208                                          struct switchdev_obj *obj)
 209 {
 210         return -EOPNOTSUPP;
 211 }
 212
 213 static inline int switchdev_port_obj_dump(struct net_device *dev,
 214                                           enum switchdev_obj_id id, void *obj,
 215                                           int (*cb)(void *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 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
 238                                             u32 seq, struct net_device *dev,
 239                                             u32 filter_mask, int nlflags)
 240 {
 241         return -EOPNOTSUPP;
 242 }
 243
 244 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 245                                                 struct nlmsghdr *nlh,
 246                                                 u16 flags)
 247 {
 248         return -EOPNOTSUPP;
 249 }
 250
 251 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 252                                                 struct nlmsghdr *nlh,
 253                                                 u16 flags)
 254 {
 255         return -EOPNOTSUPP;
 256 }
 257
 258 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 259                                          struct fib_info *fi,
 260                                          u8 tos, u8 type,
 261                                          u32 nlflags, u32 tb_id)
 262 {
 263         return 0;
 264 }
 265
 266 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 267                                          struct fib_info *fi,
 268                                          u8 tos, u8 type, u32 tb_id)
 269 {
 270         return 0;
 271 }
 272
 273 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 274 {
 275 }
 276
 277 static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 278                                          struct net_device *dev,
 279                                          const unsigned char *addr,
 280                                          u16 vid, u16 nlm_flags)
 281 {
 282         return -EOPNOTSUPP;
 283 }
 284
 285 static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 286                                          struct net_device *dev,
 287                                          const unsigned char *addr, u16 vid)
 288 {
 289         return -EOPNOTSUPP;
 290 }
 291
 292 static inline int switchdev_port_fdb_dump(struct sk_buff *skb,
 293                                           struct netlink_callback *cb,
 294                                           struct net_device *dev,
 295                                           struct net_device *filter_dev,
 296                                           int idx)
 297 {
 298         return -EOPNOTSUPP;
 299 }
 300
 301 static inline void switchdev_port_fwd_mark_set(struct net_device *dev,
 302                                                struct net_device *group_dev,
 303                                                bool joining)
 304 {
 305 }
 306
 307 #endif
 308
 309 #endif /* _LINUX_SWITCHDEV_H_ */