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 #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_ */