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 };
  29
  30 struct switchdev_attr {
  31         enum switchdev_attr_id id;
  32         enum switchdev_trans trans;
  33         u32 flags;
  34 };
  35
  36 struct fib_info;
  37
  38 /**
  39  * struct switchdev_ops - switchdev operations
  40  *
  41  * @switchdev_parent_id_get: Called to get an ID of the switch chip this port
  42  *   is part of.  If driver implements this, it indicates that it
  43  *   represents a port of a switch chip.
  44  *
  45  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
  46  *
  47  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
  48  *
  49  * @switchdev_port_stp_update: Called to notify switch device port of bridge
  50  *   port STP state change.
  51  *
  52  * @switchdev_fib_ipv4_add: Called to add/modify IPv4 route to switch device.
  53  *
  54  * @switchdev_fib_ipv4_del: Called to delete IPv4 route from switch device.
  55  */
  56 struct switchdev_ops {
  57         int     (*switchdev_parent_id_get)(struct net_device *dev,
  58                                            struct netdev_phys_item_id *psid);
  59         int     (*switchdev_port_attr_get)(struct net_device *dev,
  60                                            struct switchdev_attr *attr);
  61         int     (*switchdev_port_attr_set)(struct net_device *dev,
  62                                            struct switchdev_attr *attr);
  63         int     (*switchdev_port_stp_update)(struct net_device *dev, u8 state);
  64         int     (*switchdev_fib_ipv4_add)(struct net_device *dev, __be32 dst,
  65                                           int dst_len, struct fib_info *fi,
  66                                           u8 tos, u8 type, u32 nlflags,
  67                                           u32 tb_id);
  68         int     (*switchdev_fib_ipv4_del)(struct net_device *dev, __be32 dst,
  69                                           int dst_len, struct fib_info *fi,
  70                                           u8 tos, u8 type, u32 tb_id);
  71 };
  72
  73 enum switchdev_notifier_type {
  74         SWITCHDEV_FDB_ADD = 1,
  75         SWITCHDEV_FDB_DEL,
  76 };
  77
  78 struct switchdev_notifier_info {
  79         struct net_device *dev;
  80 };
  81
  82 struct switchdev_notifier_fdb_info {
  83         struct switchdev_notifier_info info; /* must be first */
  84         const unsigned char *addr;
  85         u16 vid;
  86 };
  87
  88 static inline struct net_device *
  89 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
  90 {
  91         return info->dev;
  92 }
  93
  94 #ifdef CONFIG_NET_SWITCHDEV
  95
  96 int switchdev_parent_id_get(struct net_device *dev,
  97                             struct netdev_phys_item_id *psid);
  98 int switchdev_port_attr_get(struct net_device *dev,
  99                             struct switchdev_attr *attr);
 100 int switchdev_port_attr_set(struct net_device *dev,
 101                             struct switchdev_attr *attr);
 102 int switchdev_port_stp_update(struct net_device *dev, u8 state);
 103 int register_switchdev_notifier(struct notifier_block *nb);
 104 int unregister_switchdev_notifier(struct notifier_block *nb);
 105 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 106                              struct switchdev_notifier_info *info);
 107 int switchdev_port_bridge_setlink(struct net_device *dev,
 108                                   struct nlmsghdr *nlh, u16 flags);
 109 int switchdev_port_bridge_dellink(struct net_device *dev,
 110                                   struct nlmsghdr *nlh, u16 flags);
 111 int ndo_dflt_switchdev_port_bridge_dellink(struct net_device *dev,
 112                                            struct nlmsghdr *nlh, u16 flags);
 113 int ndo_dflt_switchdev_port_bridge_setlink(struct net_device *dev,
 114                                            struct nlmsghdr *nlh, u16 flags);
 115 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 116                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 117 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 118                            u8 tos, u8 type, u32 tb_id);
 119 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 120
 121 #else
 122
 123 static inline int switchdev_parent_id_get(struct net_device *dev,
 124                                           struct netdev_phys_item_id *psid)
 125 {
 126         return -EOPNOTSUPP;
 127 }
 128
 129 static inline int switchdev_port_attr_get(struct net_device *dev,
 130                                           struct switchdev_attr *attr)
 131 {
 132         return -EOPNOTSUPP;
 133 }
 134
 135 static inline int switchdev_port_attr_set(struct net_device *dev,
 136                                           struct switchdev_attr *attr)
 137 {
 138         return -EOPNOTSUPP;
 139 }
 140
 141 static inline int switchdev_port_stp_update(struct net_device *dev,
 142                                             u8 state)
 143 {
 144         return -EOPNOTSUPP;
 145 }
 146
 147 static inline int register_switchdev_notifier(struct notifier_block *nb)
 148 {
 149         return 0;
 150 }
 151
 152 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 153 {
 154         return 0;
 155 }
 156
 157 static inline int call_switchdev_notifiers(unsigned long val,
 158                                            struct net_device *dev,
 159                                            struct switchdev_notifier_info *info)
 160 {
 161         return NOTIFY_DONE;
 162 }
 163
 164 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 165                                                 struct nlmsghdr *nlh,
 166                                                 u16 flags)
 167 {
 168         return -EOPNOTSUPP;
 169 }
 170
 171 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 172                                                 struct nlmsghdr *nlh,
 173                                                 u16 flags)
 174 {
 175         return -EOPNOTSUPP;
 176 }
 177
 178 static inline int ndo_dflt_switchdev_port_bridge_dellink(struct net_device *dev,
 179                                                          struct nlmsghdr *nlh,
 180                                                          u16 flags)
 181 {
 182         return 0;
 183 }
 184
 185 static inline int ndo_dflt_switchdev_port_bridge_setlink(struct net_device *dev,
 186                                                          struct nlmsghdr *nlh,
 187                                                          u16 flags)
 188 {
 189         return 0;
 190 }
 191
 192 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 193                                          struct fib_info *fi,
 194                                          u8 tos, u8 type,
 195                                          u32 nlflags, u32 tb_id)
 196 {
 197         return 0;
 198 }
 199
 200 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 201                                          struct fib_info *fi,
 202                                          u8 tos, u8 type, u32 tb_id)
 203 {
 204         return 0;
 205 }
 206
 207 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 208 {
 209 }
 210
 211 #endif
 212
 213 #endif /* _LINUX_SWITCHDEV_H_ */