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_BRIDGE_FLAGS_SUPPORT,
  50         SWITCHDEV_ATTR_ID_PORT_MROUTER,
  51         SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
  52         SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
  53         SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
  54 };
  55
  56 struct switchdev_attr {
  57         struct net_device *orig_dev;
  58         enum switchdev_attr_id id;
  59         u32 flags;
  60         void *complete_priv;
  61         void (*complete)(struct net_device *dev, int err, void *priv);
  62         union {
  63                 struct netdev_phys_item_id ppid;        /* PORT_PARENT_ID */
  64                 u8 stp_state;                           /* PORT_STP_STATE */
  65                 unsigned long brport_flags;             /* PORT_BRIDGE_FLAGS */
  66                 unsigned long brport_flags_support;     /* PORT_BRIDGE_FLAGS_SUPPORT */
  67                 bool mrouter;                           /* PORT_MROUTER */
  68                 clock_t ageing_time;                    /* BRIDGE_AGEING_TIME */
  69                 bool vlan_filtering;                    /* BRIDGE_VLAN_FILTERING */
  70                 bool mc_disabled;                       /* MC_DISABLED */
  71         } u;
  72 };
  73
  74 enum switchdev_obj_id {
  75         SWITCHDEV_OBJ_ID_UNDEFINED,
  76         SWITCHDEV_OBJ_ID_PORT_VLAN,
  77         SWITCHDEV_OBJ_ID_PORT_MDB,
  78 };
  79
  80 struct switchdev_obj {
  81         struct net_device *orig_dev;
  82         enum switchdev_obj_id id;
  83         u32 flags;
  84         void *complete_priv;
  85         void (*complete)(struct net_device *dev, int err, void *priv);
  86 };
  87
  88 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
  89 struct switchdev_obj_port_vlan {
  90         struct switchdev_obj obj;
  91         u16 flags;
  92         u16 vid_begin;
  93         u16 vid_end;
  94 };
  95
  96 #define SWITCHDEV_OBJ_PORT_VLAN(obj) \
  97         container_of(obj, struct switchdev_obj_port_vlan, obj)
  98
  99 /* SWITCHDEV_OBJ_ID_PORT_MDB */
 100 struct switchdev_obj_port_mdb {
 101         struct switchdev_obj obj;
 102         unsigned char addr[ETH_ALEN];
 103         u16 vid;
 104 };
 105
 106 #define SWITCHDEV_OBJ_PORT_MDB(obj) \
 107         container_of(obj, struct switchdev_obj_port_mdb, obj)
 108
 109 void switchdev_trans_item_enqueue(struct switchdev_trans *trans,
 110                                   void *data, void (*destructor)(void const *),
 111                                   struct switchdev_trans_item *tritem);
 112 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans);
 113
 114 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
 115
 116 /**
 117  * struct switchdev_ops - switchdev operations
 118  *
 119  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
 120  *
 121  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
 122  *
 123  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj_*).
 124  *
 125  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj_*).
 126  */
 127 struct switchdev_ops {
 128         int     (*switchdev_port_attr_get)(struct net_device *dev,
 129                                            struct switchdev_attr *attr);
 130         int     (*switchdev_port_attr_set)(struct net_device *dev,
 131                                            const struct switchdev_attr *attr,
 132                                            struct switchdev_trans *trans);
 133         int     (*switchdev_port_obj_add)(struct net_device *dev,
 134                                           const struct switchdev_obj *obj,
 135                                           struct switchdev_trans *trans);
 136         int     (*switchdev_port_obj_del)(struct net_device *dev,
 137                                           const struct switchdev_obj *obj);
 138 };
 139
 140 enum switchdev_notifier_type {
 141         SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
 142         SWITCHDEV_FDB_DEL_TO_BRIDGE,
 143         SWITCHDEV_FDB_ADD_TO_DEVICE,
 144         SWITCHDEV_FDB_DEL_TO_DEVICE,
 145         SWITCHDEV_FDB_OFFLOADED,
 146 };
 147
 148 struct switchdev_notifier_info {
 149         struct net_device *dev;
 150 };
 151
 152 struct switchdev_notifier_fdb_info {
 153         struct switchdev_notifier_info info; /* must be first */
 154         const unsigned char *addr;
 155         u16 vid;
 156 };
 157
 158 static inline struct net_device *
 159 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 160 {
 161         return info->dev;
 162 }
 163
 164 #ifdef CONFIG_NET_SWITCHDEV
 165
 166 void switchdev_deferred_process(void);
 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                             const 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 register_switchdev_notifier(struct notifier_block *nb);
 176 int unregister_switchdev_notifier(struct notifier_block *nb);
 177 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 178                              struct switchdev_notifier_info *info);
 179 void switchdev_port_fwd_mark_set(struct net_device *dev,
 180                                  struct net_device *group_dev,
 181                                  bool joining);
 182
 183 bool switchdev_port_same_parent_id(struct net_device *a,
 184                                    struct net_device *b);
 185
 186 #define SWITCHDEV_SET_OPS(netdev, ops) ((netdev)->switchdev_ops = (ops))
 187 #else
 188
 189 static inline void switchdev_deferred_process(void)
 190 {
 191 }
 192
 193 static inline int switchdev_port_attr_get(struct net_device *dev,
 194                                           struct switchdev_attr *attr)
 195 {
 196         return -EOPNOTSUPP;
 197 }
 198
 199 static inline int switchdev_port_attr_set(struct net_device *dev,
 200                                           const struct switchdev_attr *attr)
 201 {
 202         return -EOPNOTSUPP;
 203 }
 204
 205 static inline int switchdev_port_obj_add(struct net_device *dev,
 206                                          const struct switchdev_obj *obj)
 207 {
 208         return -EOPNOTSUPP;
 209 }
 210
 211 static inline int switchdev_port_obj_del(struct net_device *dev,
 212                                          const struct switchdev_obj *obj)
 213 {
 214         return -EOPNOTSUPP;
 215 }
 216
 217 static inline int register_switchdev_notifier(struct notifier_block *nb)
 218 {
 219         return 0;
 220 }
 221
 222 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 223 {
 224         return 0;
 225 }
 226
 227 static inline int call_switchdev_notifiers(unsigned long val,
 228                                            struct net_device *dev,
 229                                            struct switchdev_notifier_info *info)
 230 {
 231         return NOTIFY_DONE;
 232 }
 233
 234 static inline bool switchdev_port_same_parent_id(struct net_device *a,
 235                                                  struct net_device *b)
 236 {
 237         return false;
 238 }
 239
 240 #define SWITCHDEV_SET_OPS(netdev, ops) do {} while (0)
 241
 242 #endif
 243
 244 #endif /* _LINUX_SWITCHDEV_H_ */