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