include/net/switchdev.h

   1 /*
   2  * include/net/switchdev.h - Switch device API
   3  * Copyright (c) 2014 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
  17 #define SWITCHDEV_F_NO_RECURSE          BIT(0)
  18
  19 enum switchdev_trans {
  20         SWITCHDEV_TRANS_NONE,
  21         SWITCHDEV_TRANS_PREPARE,
  22         SWITCHDEV_TRANS_ABORT,
  23         SWITCHDEV_TRANS_COMMIT,
  24 };
  25
  26 enum switchdev_attr_id {
  27         SWITCHDEV_ATTR_UNDEFINED,
  28         SWITCHDEV_ATTR_PORT_PARENT_ID,
  29         SWITCHDEV_ATTR_PORT_STP_STATE,
  30         SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS,
  31 };
  32
  33 struct switchdev_attr {
  34         enum switchdev_attr_id id;
  35         enum switchdev_trans trans;
  36         u32 flags;
  37         union {
  38                 struct netdev_phys_item_id ppid;        /* PORT_PARENT_ID */
  39                 u8 stp_state;                           /* PORT_STP_STATE */
  40                 unsigned long brport_flags;             /* PORT_BRIDGE_FLAGS */
  41         };
  42 };
  43
  44 struct fib_info;
  45
  46 enum switchdev_obj_id {
  47         SWITCHDEV_OBJ_UNDEFINED,
  48         SWITCHDEV_OBJ_PORT_VLAN,
  49 };
  50
  51 struct switchdev_obj {
  52         enum switchdev_obj_id id;
  53         enum switchdev_trans trans;
  54         union {
  55                 struct switchdev_obj_vlan {                     /* PORT_VLAN */
  56                         u16 flags;
  57                         u16 vid_start;
  58                         u16 vid_end;
  59                 } vlan;
  60         };
  61 };
  62
  63 /**
  64  * struct switchdev_ops - switchdev operations
  65  *
  66  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
  67  *
  68  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
  69  *
  70  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj).
  71  *
  72  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj).
  73  *
  74  * @switchdev_fib_ipv4_add: Called to add/modify IPv4 route to switch device.
  75  *
  76  * @switchdev_fib_ipv4_del: Called to delete IPv4 route from switch device.
  77  */
  78 struct switchdev_ops {
  79         int     (*switchdev_port_attr_get)(struct net_device *dev,
  80                                            struct switchdev_attr *attr);
  81         int     (*switchdev_port_attr_set)(struct net_device *dev,
  82                                            struct switchdev_attr *attr);
  83         int     (*switchdev_port_obj_add)(struct net_device *dev,
  84                                           struct switchdev_obj *obj);
  85         int     (*switchdev_port_obj_del)(struct net_device *dev,
  86                                           struct switchdev_obj *obj);
  87         int     (*switchdev_fib_ipv4_add)(struct net_device *dev, __be32 dst,
  88                                           int dst_len, struct fib_info *fi,
  89                                           u8 tos, u8 type, u32 nlflags,
  90                                           u32 tb_id);
  91         int     (*switchdev_fib_ipv4_del)(struct net_device *dev, __be32 dst,
  92                                           int dst_len, struct fib_info *fi,
  93                                           u8 tos, u8 type, u32 tb_id);
  94 };
  95
  96 enum switchdev_notifier_type {
  97         SWITCHDEV_FDB_ADD = 1,
  98         SWITCHDEV_FDB_DEL,
  99 };
 100
 101 struct switchdev_notifier_info {
 102         struct net_device *dev;
 103 };
 104
 105 struct switchdev_notifier_fdb_info {
 106         struct switchdev_notifier_info info; /* must be first */
 107         const unsigned char *addr;
 108         u16 vid;
 109 };
 110
 111 static inline struct net_device *
 112 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 113 {
 114         return info->dev;
 115 }
 116
 117 #ifdef CONFIG_NET_SWITCHDEV
 118
 119 int switchdev_port_attr_get(struct net_device *dev,
 120                             struct switchdev_attr *attr);
 121 int switchdev_port_attr_set(struct net_device *dev,
 122                             struct switchdev_attr *attr);
 123 int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj);
 124 int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj);
 125 int register_switchdev_notifier(struct notifier_block *nb);
 126 int unregister_switchdev_notifier(struct notifier_block *nb);
 127 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 128                              struct switchdev_notifier_info *info);
 129 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 130                                   struct net_device *dev, u32 filter_mask,
 131                                   int nlflags);
 132 int switchdev_port_bridge_setlink(struct net_device *dev,
 133                                   struct nlmsghdr *nlh, u16 flags);
 134 int switchdev_port_bridge_dellink(struct net_device *dev,
 135                                   struct nlmsghdr *nlh, u16 flags);
 136 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 137                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 138 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 139                            u8 tos, u8 type, u32 tb_id);
 140 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 141
 142 #else
 143
 144 static inline int switchdev_port_attr_get(struct net_device *dev,
 145                                           struct switchdev_attr *attr)
 146 {
 147         return -EOPNOTSUPP;
 148 }
 149
 150 static inline int switchdev_port_attr_set(struct net_device *dev,
 151                                           struct switchdev_attr *attr)
 152 {
 153         return -EOPNOTSUPP;
 154 }
 155
 156 static inline int switchdev_port_obj_add(struct net_device *dev,
 157                                          struct switchdev_obj *obj)
 158 {
 159         return -EOPNOTSUPP;
 160 }
 161
 162 static inline int switchdev_port_obj_del(struct net_device *dev,
 163                                          struct switchdev_obj *obj)
 164 {
 165         return -EOPNOTSUPP;
 166 }
 167
 168 static inline int register_switchdev_notifier(struct notifier_block *nb)
 169 {
 170         return 0;
 171 }
 172
 173 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 174 {
 175         return 0;
 176 }
 177
 178 static inline int call_switchdev_notifiers(unsigned long val,
 179                                            struct net_device *dev,
 180                                            struct switchdev_notifier_info *info)
 181 {
 182         return NOTIFY_DONE;
 183 }
 184
 185 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
 186                                             u32 seq, struct net_device *dev,
 187                                             u32 filter_mask, int nlflags)
 188 {
 189         return -EOPNOTSUPP;
 190 }
 191
 192 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 193                                                 struct nlmsghdr *nlh,
 194                                                 u16 flags)
 195 {
 196         return -EOPNOTSUPP;
 197 }
 198
 199 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 200                                                 struct nlmsghdr *nlh,
 201                                                 u16 flags)
 202 {
 203         return -EOPNOTSUPP;
 204 }
 205
 206 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 207                                          struct fib_info *fi,
 208                                          u8 tos, u8 type,
 209                                          u32 nlflags, u32 tb_id)
 210 {
 211         return 0;
 212 }
 213
 214 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 215                                          struct fib_info *fi,
 216                                          u8 tos, u8 type, u32 tb_id)
 217 {
 218         return 0;
 219 }
 220
 221 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 222 {
 223 }
 224
 225 #endif
 226
 227 #endif /* _LINUX_SWITCHDEV_H_ */