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 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
  68 struct switchdev_obj_vlan {
  69         u16 flags;
  70         u16 vid_begin;
  71         u16 vid_end;
  72 };
  73
  74 /* SWITCHDEV_OBJ_ID_IPV4_FIB */
  75 struct switchdev_obj_ipv4_fib {
  76         u32 dst;
  77         int dst_len;
  78         struct fib_info *fi;
  79         u8 tos;
  80         u8 type;
  81         u32 nlflags;
  82         u32 tb_id;
  83 };
  84
  85 /* SWITCHDEV_OBJ_ID_PORT_FDB */
  86 struct switchdev_obj_fdb {
  87         const unsigned char *addr;
  88         u16 vid;
  89         u16 ndm_state;
  90 };
  91
  92 void switchdev_trans_item_enqueue(struct switchdev_trans *trans,
  93                                   void *data, void (*destructor)(void const *),
  94                                   struct switchdev_trans_item *tritem);
  95 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans);
  96
  97 /**
  98  * struct switchdev_ops - switchdev operations
  99  *
 100  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
 101  *
 102  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
 103  *
 104  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj_*).
 105  *
 106  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj_*).
 107  *
 108  * @switchdev_port_obj_dump: Dump port objects (see switchdev_obj_*).
 109  */
 110 struct switchdev_ops {
 111         int     (*switchdev_port_attr_get)(struct net_device *dev,
 112                                            struct switchdev_attr *attr);
 113         int     (*switchdev_port_attr_set)(struct net_device *dev,
 114                                            struct switchdev_attr *attr,
 115                                            struct switchdev_trans *trans);
 116         int     (*switchdev_port_obj_add)(struct net_device *dev,
 117                                           enum switchdev_obj_id id,
 118                                           const void *obj,
 119                                           struct switchdev_trans *trans);
 120         int     (*switchdev_port_obj_del)(struct net_device *dev,
 121                                           enum switchdev_obj_id id,
 122                                           const void *obj);
 123         int     (*switchdev_port_obj_dump)(struct net_device *dev,
 124                                            enum switchdev_obj_id id, void *obj,
 125                                            int (*cb)(void *obj));
 126 };
 127
 128 enum switchdev_notifier_type {
 129         SWITCHDEV_FDB_ADD = 1,
 130         SWITCHDEV_FDB_DEL,
 131 };
 132
 133 struct switchdev_notifier_info {
 134         struct net_device *dev;
 135 };
 136
 137 struct switchdev_notifier_fdb_info {
 138         struct switchdev_notifier_info info; /* must be first */
 139         const unsigned char *addr;
 140         u16 vid;
 141 };
 142
 143 static inline struct net_device *
 144 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 145 {
 146         return info->dev;
 147 }
 148
 149 #ifdef CONFIG_NET_SWITCHDEV
 150
 151 int switchdev_port_attr_get(struct net_device *dev,
 152                             struct switchdev_attr *attr);
 153 int switchdev_port_attr_set(struct net_device *dev,
 154                             struct switchdev_attr *attr);
 155 int switchdev_port_obj_add(struct net_device *dev, enum switchdev_obj_id id,
 156                            const void *obj);
 157 int switchdev_port_obj_del(struct net_device *dev, enum switchdev_obj_id id,
 158                            const void *obj);
 159 int switchdev_port_obj_dump(struct net_device *dev, enum switchdev_obj_id id,
 160                             void *obj, int (*cb)(void *obj));
 161 int register_switchdev_notifier(struct notifier_block *nb);
 162 int unregister_switchdev_notifier(struct notifier_block *nb);
 163 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 164                              struct switchdev_notifier_info *info);
 165 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 166                                   struct net_device *dev, u32 filter_mask,
 167                                   int nlflags);
 168 int switchdev_port_bridge_setlink(struct net_device *dev,
 169                                   struct nlmsghdr *nlh, u16 flags);
 170 int switchdev_port_bridge_dellink(struct net_device *dev,
 171                                   struct nlmsghdr *nlh, u16 flags);
 172 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 173                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 174 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 175                            u8 tos, u8 type, u32 tb_id);
 176 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 177 int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 178                            struct net_device *dev, const unsigned char *addr,
 179                            u16 vid, u16 nlm_flags);
 180 int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 181                            struct net_device *dev, const unsigned char *addr,
 182                            u16 vid);
 183 int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 184                             struct net_device *dev,
 185                             struct net_device *filter_dev, int idx);
 186 void switchdev_port_fwd_mark_set(struct net_device *dev,
 187                                  struct net_device *group_dev,
 188                                  bool joining);
 189
 190 #else
 191
 192 static inline int switchdev_port_attr_get(struct net_device *dev,
 193                                           struct switchdev_attr *attr)
 194 {
 195         return -EOPNOTSUPP;
 196 }
 197
 198 static inline int switchdev_port_attr_set(struct net_device *dev,
 199                                           struct switchdev_attr *attr)
 200 {
 201         return -EOPNOTSUPP;
 202 }
 203
 204 static inline int switchdev_port_obj_add(struct net_device *dev,
 205                                          enum switchdev_obj_id id,
 206                                          const void *obj)
 207 {
 208         return -EOPNOTSUPP;
 209 }
 210
 211 static inline int switchdev_port_obj_del(struct net_device *dev,
 212                                          enum switchdev_obj_id id,
 213                                          const void *obj)
 214 {
 215         return -EOPNOTSUPP;
 216 }
 217
 218 static inline int switchdev_port_obj_dump(struct net_device *dev,
 219                                           enum switchdev_obj_id id, void *obj,
 220                                           int (*cb)(void *obj))
 221 {
 222         return -EOPNOTSUPP;
 223 }
 224
 225 static inline int register_switchdev_notifier(struct notifier_block *nb)
 226 {
 227         return 0;
 228 }
 229
 230 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 231 {
 232         return 0;
 233 }
 234
 235 static inline int call_switchdev_notifiers(unsigned long val,
 236                                            struct net_device *dev,
 237                                            struct switchdev_notifier_info *info)
 238 {
 239         return NOTIFY_DONE;
 240 }
 241
 242 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
 243                                             u32 seq, struct net_device *dev,
 244                                             u32 filter_mask, int nlflags)
 245 {
 246         return -EOPNOTSUPP;
 247 }
 248
 249 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 250                                                 struct nlmsghdr *nlh,
 251                                                 u16 flags)
 252 {
 253         return -EOPNOTSUPP;
 254 }
 255
 256 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 257                                                 struct nlmsghdr *nlh,
 258                                                 u16 flags)
 259 {
 260         return -EOPNOTSUPP;
 261 }
 262
 263 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 264                                          struct fib_info *fi,
 265                                          u8 tos, u8 type,
 266                                          u32 nlflags, u32 tb_id)
 267 {
 268         return 0;
 269 }
 270
 271 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 272                                          struct fib_info *fi,
 273                                          u8 tos, u8 type, u32 tb_id)
 274 {
 275         return 0;
 276 }
 277
 278 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 279 {
 280 }
 281
 282 static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 283                                          struct net_device *dev,
 284                                          const unsigned char *addr,
 285                                          u16 vid, u16 nlm_flags)
 286 {
 287         return -EOPNOTSUPP;
 288 }
 289
 290 static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 291                                          struct net_device *dev,
 292                                          const unsigned char *addr, u16 vid)
 293 {
 294         return -EOPNOTSUPP;
 295 }
 296
 297 static inline int switchdev_port_fdb_dump(struct sk_buff *skb,
 298                                           struct netlink_callback *cb,
 299                                           struct net_device *dev,
 300                                           struct net_device *filter_dev,
 301                                           int idx)
 302 {
 303         return -EOPNOTSUPP;
 304 }
 305
 306 static inline void switchdev_port_fwd_mark_set(struct net_device *dev,
 307                                                struct net_device *group_dev,
 308                                                bool joining)
 309 {
 310 }
 311
 312 #endif
 313
 314 #endif /* _LINUX_SWITCHDEV_H_ */