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         SWITCHDEV_OBJ_PORT_FDB,
  51 };
  52
  53 struct switchdev_obj {
  54         enum switchdev_obj_id id;
  55         enum switchdev_trans trans;
  56         int (*cb)(struct net_device *dev, struct switchdev_obj *obj);
  57         union {
  58                 struct switchdev_obj_vlan {             /* PORT_VLAN */
  59                         u16 flags;
  60                         u16 vid_begin;
  61                         u16 vid_end;
  62                 } vlan;
  63                 struct switchdev_obj_ipv4_fib {         /* IPV4_FIB */
  64                         u32 dst;
  65                         int dst_len;
  66                         struct fib_info *fi;
  67                         u8 tos;
  68                         u8 type;
  69                         u32 nlflags;
  70                         u32 tb_id;
  71                 } ipv4_fib;
  72                 struct switchdev_obj_fdb {              /* PORT_FDB */
  73                         const unsigned char *addr;
  74                         u16 vid;
  75                 } fdb;
  76         } u;
  77 };
  78
  79 /**
  80  * struct switchdev_ops - switchdev operations
  81  *
  82  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
  83  *
  84  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
  85  *
  86  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj).
  87  *
  88  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj).
  89  *
  90  * @switchdev_port_obj_dump: Dump port objects (see switchdev_obj).
  91  */
  92 struct switchdev_ops {
  93         int     (*switchdev_port_attr_get)(struct net_device *dev,
  94                                            struct switchdev_attr *attr);
  95         int     (*switchdev_port_attr_set)(struct net_device *dev,
  96                                            struct switchdev_attr *attr);
  97         int     (*switchdev_port_obj_add)(struct net_device *dev,
  98                                           struct switchdev_obj *obj);
  99         int     (*switchdev_port_obj_del)(struct net_device *dev,
 100                                           struct switchdev_obj *obj);
 101         int     (*switchdev_port_obj_dump)(struct net_device *dev,
 102                                           struct switchdev_obj *obj);
 103 };
 104
 105 enum switchdev_notifier_type {
 106         SWITCHDEV_FDB_ADD = 1,
 107         SWITCHDEV_FDB_DEL,
 108 };
 109
 110 struct switchdev_notifier_info {
 111         struct net_device *dev;
 112 };
 113
 114 struct switchdev_notifier_fdb_info {
 115         struct switchdev_notifier_info info; /* must be first */
 116         const unsigned char *addr;
 117         u16 vid;
 118 };
 119
 120 static inline struct net_device *
 121 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 122 {
 123         return info->dev;
 124 }
 125
 126 #ifdef CONFIG_NET_SWITCHDEV
 127
 128 int switchdev_port_attr_get(struct net_device *dev,
 129                             struct switchdev_attr *attr);
 130 int switchdev_port_attr_set(struct net_device *dev,
 131                             struct switchdev_attr *attr);
 132 int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj);
 133 int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj);
 134 int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj);
 135 int register_switchdev_notifier(struct notifier_block *nb);
 136 int unregister_switchdev_notifier(struct notifier_block *nb);
 137 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 138                              struct switchdev_notifier_info *info);
 139 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 140                                   struct net_device *dev, u32 filter_mask,
 141                                   int nlflags);
 142 int switchdev_port_bridge_setlink(struct net_device *dev,
 143                                   struct nlmsghdr *nlh, u16 flags);
 144 int switchdev_port_bridge_dellink(struct net_device *dev,
 145                                   struct nlmsghdr *nlh, u16 flags);
 146 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 147                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 148 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 149                            u8 tos, u8 type, u32 tb_id);
 150 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 151 int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 152                            struct net_device *dev, const unsigned char *addr,
 153                            u16 vid, u16 nlm_flags);
 154 int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 155                            struct net_device *dev, const unsigned char *addr,
 156                            u16 vid);
 157 int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 158                             struct net_device *dev,
 159                             struct net_device *filter_dev, int idx);
 160
 161 #else
 162
 163 static inline int switchdev_port_attr_get(struct net_device *dev,
 164                                           struct switchdev_attr *attr)
 165 {
 166         return -EOPNOTSUPP;
 167 }
 168
 169 static inline int switchdev_port_attr_set(struct net_device *dev,
 170                                           struct switchdev_attr *attr)
 171 {
 172         return -EOPNOTSUPP;
 173 }
 174
 175 static inline int switchdev_port_obj_add(struct net_device *dev,
 176                                          struct switchdev_obj *obj)
 177 {
 178         return -EOPNOTSUPP;
 179 }
 180
 181 static inline int switchdev_port_obj_del(struct net_device *dev,
 182                                          struct switchdev_obj *obj)
 183 {
 184         return -EOPNOTSUPP;
 185 }
 186
 187 static inline int switchdev_port_obj_dump(struct net_device *dev,
 188                                           struct switchdev_obj *obj)
 189 {
 190         return -EOPNOTSUPP;
 191 }
 192
 193 static inline int register_switchdev_notifier(struct notifier_block *nb)
 194 {
 195         return 0;
 196 }
 197
 198 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 199 {
 200         return 0;
 201 }
 202
 203 static inline int call_switchdev_notifiers(unsigned long val,
 204                                            struct net_device *dev,
 205                                            struct switchdev_notifier_info *info)
 206 {
 207         return NOTIFY_DONE;
 208 }
 209
 210 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
 211                                             u32 seq, struct net_device *dev,
 212                                             u32 filter_mask, int nlflags)
 213 {
 214         return -EOPNOTSUPP;
 215 }
 216
 217 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 218                                                 struct nlmsghdr *nlh,
 219                                                 u16 flags)
 220 {
 221         return -EOPNOTSUPP;
 222 }
 223
 224 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 225                                                 struct nlmsghdr *nlh,
 226                                                 u16 flags)
 227 {
 228         return -EOPNOTSUPP;
 229 }
 230
 231 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 232                                          struct fib_info *fi,
 233                                          u8 tos, u8 type,
 234                                          u32 nlflags, u32 tb_id)
 235 {
 236         return 0;
 237 }
 238
 239 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 240                                          struct fib_info *fi,
 241                                          u8 tos, u8 type, u32 tb_id)
 242 {
 243         return 0;
 244 }
 245
 246 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 247 {
 248 }
 249
 250 static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 251                                          struct net_device *dev,
 252                                          const unsigned char *addr,
 253                                          u16 vid, u16 nlm_flags)
 254 {
 255         return -EOPNOTSUPP;
 256 }
 257
 258 static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 259                                          struct net_device *dev,
 260                                          const unsigned char *addr, u16 vid)
 261 {
 262         return -EOPNOTSUPP;
 263 }
 264
 265 static inline int switchdev_port_fdb_dump(struct sk_buff *skb,
 266                                           struct netlink_callback *cb,
 267                                           struct net_device *dev,
 268                                           struct net_device *filter_dev,
 269                                           int idx)
 270 {
 271         return -EOPNOTSUPP;
 272 }
 273
 274 #endif
 275
 276 #endif /* _LINUX_SWITCHDEV_H_ */