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         } u;
  42 };
  43
  44 struct fib_info;
  45
  46 enum switchdev_obj_id {
  47         SWITCHDEV_OBJ_UNDEFINED,
  48         SWITCHDEV_OBJ_PORT_VLAN,
  49         SWITCHDEV_OBJ_IPV4_FIB,
  50 };
  51
  52 struct switchdev_obj {
  53         enum switchdev_obj_id id;
  54         enum switchdev_trans trans;
  55         union {
  56                 struct switchdev_obj_vlan {             /* PORT_VLAN */
  57                         u16 flags;
  58                         u16 vid_start;
  59                         u16 vid_end;
  60                 } vlan;
  61                 struct switchdev_obj_ipv4_fib {         /* IPV4_FIB */
  62                         u32 dst;
  63                         int dst_len;
  64                         struct fib_info *fi;
  65                         u8 tos;
  66                         u8 type;
  67                         u32 nlflags;
  68                         u32 tb_id;
  69                 } ipv4_fib;
  70         } u;
  71 };
  72
  73 /**
  74  * struct switchdev_ops - switchdev operations
  75  *
  76  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
  77  *
  78  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
  79  *
  80  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj).
  81  *
  82  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj).
  83  */
  84 struct switchdev_ops {
  85         int     (*switchdev_port_attr_get)(struct net_device *dev,
  86                                            struct switchdev_attr *attr);
  87         int     (*switchdev_port_attr_set)(struct net_device *dev,
  88                                            struct switchdev_attr *attr);
  89         int     (*switchdev_port_obj_add)(struct net_device *dev,
  90                                           struct switchdev_obj *obj);
  91         int     (*switchdev_port_obj_del)(struct net_device *dev,
  92                                           struct switchdev_obj *obj);
  93 };
  94
  95 enum switchdev_notifier_type {
  96         SWITCHDEV_FDB_ADD = 1,
  97         SWITCHDEV_FDB_DEL,
  98 };
  99
 100 struct switchdev_notifier_info {
 101         struct net_device *dev;
 102 };
 103
 104 struct switchdev_notifier_fdb_info {
 105         struct switchdev_notifier_info info; /* must be first */
 106         const unsigned char *addr;
 107         u16 vid;
 108 };
 109
 110 static inline struct net_device *
 111 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 112 {
 113         return info->dev;
 114 }
 115
 116 #ifdef CONFIG_NET_SWITCHDEV
 117
 118 int switchdev_port_attr_get(struct net_device *dev,
 119                             struct switchdev_attr *attr);
 120 int switchdev_port_attr_set(struct net_device *dev,
 121                             struct switchdev_attr *attr);
 122 int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj);
 123 int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj);
 124 int register_switchdev_notifier(struct notifier_block *nb);
 125 int unregister_switchdev_notifier(struct notifier_block *nb);
 126 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 127                              struct switchdev_notifier_info *info);
 128 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 129                                   struct net_device *dev, u32 filter_mask,
 130                                   int nlflags);
 131 int switchdev_port_bridge_setlink(struct net_device *dev,
 132                                   struct nlmsghdr *nlh, u16 flags);
 133 int switchdev_port_bridge_dellink(struct net_device *dev,
 134                                   struct nlmsghdr *nlh, u16 flags);
 135 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 136                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 137 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 138                            u8 tos, u8 type, u32 tb_id);
 139 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 140
 141 #else
 142
 143 static inline int switchdev_port_attr_get(struct net_device *dev,
 144                                           struct switchdev_attr *attr)
 145 {
 146         return -EOPNOTSUPP;
 147 }
 148
 149 static inline int switchdev_port_attr_set(struct net_device *dev,
 150                                           struct switchdev_attr *attr)
 151 {
 152         return -EOPNOTSUPP;
 153 }
 154
 155 static inline int switchdev_port_obj_add(struct net_device *dev,
 156                                          struct switchdev_obj *obj)
 157 {
 158         return -EOPNOTSUPP;
 159 }
 160
 161 static inline int switchdev_port_obj_del(struct net_device *dev,
 162                                          struct switchdev_obj *obj)
 163 {
 164         return -EOPNOTSUPP;
 165 }
 166
 167 static inline int register_switchdev_notifier(struct notifier_block *nb)
 168 {
 169         return 0;
 170 }
 171
 172 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 173 {
 174         return 0;
 175 }
 176
 177 static inline int call_switchdev_notifiers(unsigned long val,
 178                                            struct net_device *dev,
 179                                            struct switchdev_notifier_info *info)
 180 {
 181         return NOTIFY_DONE;
 182 }
 183
 184 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
 185                                             u32 seq, struct net_device *dev,
 186                                             u32 filter_mask, int nlflags)
 187 {
 188         return -EOPNOTSUPP;
 189 }
 190
 191 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 192                                                 struct nlmsghdr *nlh,
 193                                                 u16 flags)
 194 {
 195         return -EOPNOTSUPP;
 196 }
 197
 198 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 199                                                 struct nlmsghdr *nlh,
 200                                                 u16 flags)
 201 {
 202         return -EOPNOTSUPP;
 203 }
 204
 205 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 206                                          struct fib_info *fi,
 207                                          u8 tos, u8 type,
 208                                          u32 nlflags, u32 tb_id)
 209 {
 210         return 0;
 211 }
 212
 213 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 214                                          struct fib_info *fi,
 215                                          u8 tos, u8 type, u32 tb_id)
 216 {
 217         return 0;
 218 }
 219
 220 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 221 {
 222 }
 223
 224 #endif
 225
 226 #endif /* _LINUX_SWITCHDEV_H_ */