include/net/switchdev.h

   1 /*
   2  * include/net/switchdev.h - Switch device API
   3  * Copyright (c) 2014-2015 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 #include <linux/list.h>
  17
  18 #define SWITCHDEV_F_NO_RECURSE          BIT(0)
  19
  20 struct switchdev_trans_item {
  21         struct list_head list;
  22         void *data;
  23         void (*destructor)(const void *data);
  24 };
  25
  26 struct switchdev_trans {
  27         struct list_head item_list;
  28         bool ph_prepare;
  29 };
  30
  31 static inline bool switchdev_trans_ph_prepare(struct switchdev_trans *trans)
  32 {
  33         return trans && trans->ph_prepare;
  34 }
  35
  36 static inline bool switchdev_trans_ph_commit(struct switchdev_trans *trans)
  37 {
  38         return trans && !trans->ph_prepare;
  39 }
  40
  41 enum switchdev_attr_id {
  42         SWITCHDEV_ATTR_UNDEFINED,
  43         SWITCHDEV_ATTR_PORT_PARENT_ID,
  44         SWITCHDEV_ATTR_PORT_STP_STATE,
  45         SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS,
  46 };
  47
  48 struct switchdev_attr {
  49         enum switchdev_attr_id id;
  50         u32 flags;
  51         union {
  52                 struct netdev_phys_item_id ppid;        /* PORT_PARENT_ID */
  53                 u8 stp_state;                           /* PORT_STP_STATE */
  54                 unsigned long brport_flags;             /* PORT_BRIDGE_FLAGS */
  55         } u;
  56 };
  57
  58 struct fib_info;
  59
  60 enum switchdev_obj_id {
  61         SWITCHDEV_OBJ_UNDEFINED,
  62         SWITCHDEV_OBJ_PORT_VLAN,
  63         SWITCHDEV_OBJ_IPV4_FIB,
  64         SWITCHDEV_OBJ_PORT_FDB,
  65 };
  66
  67 struct switchdev_obj {
  68         enum switchdev_obj_id id;
  69         int (*cb)(struct switchdev_obj *obj);
  70         union {
  71                 struct switchdev_obj_vlan {             /* PORT_VLAN */
  72                         u16 flags;
  73                         u16 vid_begin;
  74                         u16 vid_end;
  75                 } vlan;
  76                 struct switchdev_obj_ipv4_fib {         /* IPV4_FIB */
  77                         u32 dst;
  78                         int dst_len;
  79                         struct fib_info *fi;
  80                         u8 tos;
  81                         u8 type;
  82                         u32 nlflags;
  83                         u32 tb_id;
  84                 } ipv4_fib;
  85                 struct switchdev_obj_fdb {              /* PORT_FDB */
  86                         const unsigned char *addr;
  87                         u16 vid;
  88                         u16 ndm_state;
  89                 } fdb;
  90         } u;
  91 };
  92
  93 void switchdev_trans_item_enqueue(struct switchdev_trans *trans,
  94                                   void *data, void (*destructor)(void const *),
  95                                   struct switchdev_trans_item *tritem);
  96 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans);
  97
  98 /**
  99  * struct switchdev_ops - switchdev operations
 100  *
 101  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
 102  *
 103  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
 104  *
 105  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj).
 106  *
 107  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj).
 108  *
 109  * @switchdev_port_obj_dump: Dump port objects (see switchdev_obj).
 110  */
 111 struct switchdev_ops {
 112         int     (*switchdev_port_attr_get)(struct net_device *dev,
 113                                            struct switchdev_attr *attr);
 114         int     (*switchdev_port_attr_set)(struct net_device *dev,
 115                                            struct switchdev_attr *attr,
 116                                            struct switchdev_trans *trans);
 117         int     (*switchdev_port_obj_add)(struct net_device *dev,
 118                                           struct switchdev_obj *obj,
 119                                           struct switchdev_trans *trans);
 120         int     (*switchdev_port_obj_del)(struct net_device *dev,
 121                                           struct switchdev_obj *obj);
 122         int     (*switchdev_port_obj_dump)(struct net_device *dev,
 123                                           struct switchdev_obj *obj);
 124 };
 125
 126 enum switchdev_notifier_type {
 127         SWITCHDEV_FDB_ADD = 1,
 128         SWITCHDEV_FDB_DEL,
 129 };
 130
 131 struct switchdev_notifier_info {
 132         struct net_device *dev;
 133 };
 134
 135 struct switchdev_notifier_fdb_info {
 136         struct switchdev_notifier_info info; /* must be first */
 137         const unsigned char *addr;
 138         u16 vid;
 139 };
 140
 141 static inline struct net_device *
 142 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 143 {
 144         return info->dev;
 145 }
 146
 147 #ifdef CONFIG_NET_SWITCHDEV
 148
 149 int switchdev_port_attr_get(struct net_device *dev,
 150                             struct switchdev_attr *attr);
 151 int switchdev_port_attr_set(struct net_device *dev,
 152                             struct switchdev_attr *attr);
 153 int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj);
 154 int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj);
 155 int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj);
 156 int register_switchdev_notifier(struct notifier_block *nb);
 157 int unregister_switchdev_notifier(struct notifier_block *nb);
 158 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 159                              struct switchdev_notifier_info *info);
 160 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 161                                   struct net_device *dev, u32 filter_mask,
 162                                   int nlflags);
 163 int switchdev_port_bridge_setlink(struct net_device *dev,
 164                                   struct nlmsghdr *nlh, u16 flags);
 165 int switchdev_port_bridge_dellink(struct net_device *dev,
 166                                   struct nlmsghdr *nlh, u16 flags);
 167 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 168                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 169 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 170                            u8 tos, u8 type, u32 tb_id);
 171 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 172 int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 173                            struct net_device *dev, const unsigned char *addr,
 174                            u16 vid, u16 nlm_flags);
 175 int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 176                            struct net_device *dev, const unsigned char *addr,
 177                            u16 vid);
 178 int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 179                             struct net_device *dev,
 180                             struct net_device *filter_dev, int idx);
 181 void switchdev_port_fwd_mark_set(struct net_device *dev,
 182                                  struct net_device *group_dev,
 183                                  bool joining);
 184
 185 #else
 186
 187 static inline int switchdev_port_attr_get(struct net_device *dev,
 188                                           struct switchdev_attr *attr)
 189 {
 190         return -EOPNOTSUPP;
 191 }
 192
 193 static inline int switchdev_port_attr_set(struct net_device *dev,
 194                                           struct switchdev_attr *attr)
 195 {
 196         return -EOPNOTSUPP;
 197 }
 198
 199 static inline int switchdev_port_obj_add(struct net_device *dev,
 200                                          struct switchdev_obj *obj)
 201 {
 202         return -EOPNOTSUPP;
 203 }
 204
 205 static inline int switchdev_port_obj_del(struct net_device *dev,
 206                                          struct switchdev_obj *obj)
 207 {
 208         return -EOPNOTSUPP;
 209 }
 210
 211 static inline int switchdev_port_obj_dump(struct net_device *dev,
 212                                           struct switchdev_obj *obj)
 213 {
 214         return -EOPNOTSUPP;
 215 }
 216
 217 static inline int register_switchdev_notifier(struct notifier_block *nb)
 218 {
 219         return 0;
 220 }
 221
 222 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 223 {
 224         return 0;
 225 }
 226
 227 static inline int call_switchdev_notifiers(unsigned long val,
 228                                            struct net_device *dev,
 229                                            struct switchdev_notifier_info *info)
 230 {
 231         return NOTIFY_DONE;
 232 }
 233
 234 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
 235                                             u32 seq, struct net_device *dev,
 236                                             u32 filter_mask, int nlflags)
 237 {
 238         return -EOPNOTSUPP;
 239 }
 240
 241 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 242                                                 struct nlmsghdr *nlh,
 243                                                 u16 flags)
 244 {
 245         return -EOPNOTSUPP;
 246 }
 247
 248 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 249                                                 struct nlmsghdr *nlh,
 250                                                 u16 flags)
 251 {
 252         return -EOPNOTSUPP;
 253 }
 254
 255 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 256                                          struct fib_info *fi,
 257                                          u8 tos, u8 type,
 258                                          u32 nlflags, u32 tb_id)
 259 {
 260         return 0;
 261 }
 262
 263 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 264                                          struct fib_info *fi,
 265                                          u8 tos, u8 type, u32 tb_id)
 266 {
 267         return 0;
 268 }
 269
 270 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 271 {
 272 }
 273
 274 static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 275                                          struct net_device *dev,
 276                                          const unsigned char *addr,
 277                                          u16 vid, u16 nlm_flags)
 278 {
 279         return -EOPNOTSUPP;
 280 }
 281
 282 static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 283                                          struct net_device *dev,
 284                                          const unsigned char *addr, u16 vid)
 285 {
 286         return -EOPNOTSUPP;
 287 }
 288
 289 static inline int switchdev_port_fdb_dump(struct sk_buff *skb,
 290                                           struct netlink_callback *cb,
 291                                           struct net_device *dev,
 292                                           struct net_device *filter_dev,
 293                                           int idx)
 294 {
 295         return -EOPNOTSUPP;
 296 }
 297
 298 static inline void switchdev_port_fwd_mark_set(struct net_device *dev,
 299                                                struct net_device *group_dev,
 300                                                bool joining)
 301 {
 302 }
 303
 304 #endif
 305
 306 #endif /* _LINUX_SWITCHDEV_H_ */