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 };
  30
  31 struct switchdev_attr {
  32         enum switchdev_attr_id id;
  33         enum switchdev_trans trans;
  34         u32 flags;
  35         union {
  36                 struct netdev_phys_item_id ppid;        /* PORT_PARENT_ID */
  37         };
  38 };
  39
  40 struct fib_info;
  41
  42 /**
  43  * struct switchdev_ops - switchdev operations
  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_port_attr_get)(struct net_device *dev,
  58                                            struct switchdev_attr *attr);
  59         int     (*switchdev_port_attr_set)(struct net_device *dev,
  60                                            struct switchdev_attr *attr);
  61         int     (*switchdev_port_stp_update)(struct net_device *dev, u8 state);
  62         int     (*switchdev_fib_ipv4_add)(struct net_device *dev, __be32 dst,
  63                                           int dst_len, struct fib_info *fi,
  64                                           u8 tos, u8 type, u32 nlflags,
  65                                           u32 tb_id);
  66         int     (*switchdev_fib_ipv4_del)(struct net_device *dev, __be32 dst,
  67                                           int dst_len, struct fib_info *fi,
  68                                           u8 tos, u8 type, u32 tb_id);
  69 };
  70
  71 enum switchdev_notifier_type {
  72         SWITCHDEV_FDB_ADD = 1,
  73         SWITCHDEV_FDB_DEL,
  74 };
  75
  76 struct switchdev_notifier_info {
  77         struct net_device *dev;
  78 };
  79
  80 struct switchdev_notifier_fdb_info {
  81         struct switchdev_notifier_info info; /* must be first */
  82         const unsigned char *addr;
  83         u16 vid;
  84 };
  85
  86 static inline struct net_device *
  87 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
  88 {
  89         return info->dev;
  90 }
  91
  92 #ifdef CONFIG_NET_SWITCHDEV
  93
  94 int switchdev_port_attr_get(struct net_device *dev,
  95                             struct switchdev_attr *attr);
  96 int switchdev_port_attr_set(struct net_device *dev,
  97                             struct switchdev_attr *attr);
  98 int switchdev_port_stp_update(struct net_device *dev, u8 state);
  99 int register_switchdev_notifier(struct notifier_block *nb);
 100 int unregister_switchdev_notifier(struct notifier_block *nb);
 101 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 102                              struct switchdev_notifier_info *info);
 103 int switchdev_port_bridge_setlink(struct net_device *dev,
 104                                   struct nlmsghdr *nlh, u16 flags);
 105 int switchdev_port_bridge_dellink(struct net_device *dev,
 106                                   struct nlmsghdr *nlh, u16 flags);
 107 int ndo_dflt_switchdev_port_bridge_dellink(struct net_device *dev,
 108                                            struct nlmsghdr *nlh, u16 flags);
 109 int ndo_dflt_switchdev_port_bridge_setlink(struct net_device *dev,
 110                                            struct nlmsghdr *nlh, u16 flags);
 111 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 112                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 113 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 114                            u8 tos, u8 type, u32 tb_id);
 115 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 116
 117 #else
 118
 119 static inline int switchdev_port_attr_get(struct net_device *dev,
 120                                           struct switchdev_attr *attr)
 121 {
 122         return -EOPNOTSUPP;
 123 }
 124
 125 static inline int switchdev_port_attr_set(struct net_device *dev,
 126                                           struct switchdev_attr *attr)
 127 {
 128         return -EOPNOTSUPP;
 129 }
 130
 131 static inline int switchdev_port_stp_update(struct net_device *dev,
 132                                             u8 state)
 133 {
 134         return -EOPNOTSUPP;
 135 }
 136
 137 static inline int register_switchdev_notifier(struct notifier_block *nb)
 138 {
 139         return 0;
 140 }
 141
 142 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 143 {
 144         return 0;
 145 }
 146
 147 static inline int call_switchdev_notifiers(unsigned long val,
 148                                            struct net_device *dev,
 149                                            struct switchdev_notifier_info *info)
 150 {
 151         return NOTIFY_DONE;
 152 }
 153
 154 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 155                                                 struct nlmsghdr *nlh,
 156                                                 u16 flags)
 157 {
 158         return -EOPNOTSUPP;
 159 }
 160
 161 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 162                                                 struct nlmsghdr *nlh,
 163                                                 u16 flags)
 164 {
 165         return -EOPNOTSUPP;
 166 }
 167
 168 static inline int ndo_dflt_switchdev_port_bridge_dellink(struct net_device *dev,
 169                                                          struct nlmsghdr *nlh,
 170                                                          u16 flags)
 171 {
 172         return 0;
 173 }
 174
 175 static inline int ndo_dflt_switchdev_port_bridge_setlink(struct net_device *dev,
 176                                                          struct nlmsghdr *nlh,
 177                                                          u16 flags)
 178 {
 179         return 0;
 180 }
 181
 182 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 183                                          struct fib_info *fi,
 184                                          u8 tos, u8 type,
 185                                          u32 nlflags, u32 tb_id)
 186 {
 187         return 0;
 188 }
 189
 190 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 191                                          struct fib_info *fi,
 192                                          u8 tos, u8 type, u32 tb_id)
 193 {
 194         return 0;
 195 }
 196
 197 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 198 {
 199 }
 200
 201 #endif
 202
 203 #endif /* _LINUX_SWITCHDEV_H_ */