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                                           enum switchdev_obj_id id,
 119                                           const void *obj,
 120                                           struct switchdev_trans *trans);
 121         int     (*switchdev_port_obj_del)(struct net_device *dev,
 122                                           enum switchdev_obj_id id,
 123                                           const void *obj);
 124         int     (*switchdev_port_obj_dump)(struct net_device *dev,
 125                                            enum switchdev_obj_id id, void *obj,
 126                                            int (*cb)(void *obj));
 127 };
 128
 129 enum switchdev_notifier_type {
 130         SWITCHDEV_FDB_ADD = 1,
 131         SWITCHDEV_FDB_DEL,
 132 };
 133
 134 struct switchdev_notifier_info {
 135         struct net_device *dev;
 136 };
 137
 138 struct switchdev_notifier_fdb_info {
 139         struct switchdev_notifier_info info; /* must be first */
 140         const unsigned char *addr;
 141         u16 vid;
 142 };
 143
 144 static inline struct net_device *
 145 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 146 {
 147         return info->dev;
 148 }
 149
 150 #ifdef CONFIG_NET_SWITCHDEV
 151
 152 int switchdev_port_attr_get(struct net_device *dev,
 153                             struct switchdev_attr *attr);
 154 int switchdev_port_attr_set(struct net_device *dev,
 155                             struct switchdev_attr *attr);
 156 int switchdev_port_obj_add(struct net_device *dev, enum switchdev_obj_id id,
 157                            const void *obj);
 158 int switchdev_port_obj_del(struct net_device *dev, enum switchdev_obj_id id,
 159                            const void *obj);
 160 int switchdev_port_obj_dump(struct net_device *dev, enum switchdev_obj_id id,
 161                             void *obj, int (*cb)(void *obj));
 162 int register_switchdev_notifier(struct notifier_block *nb);
 163 int unregister_switchdev_notifier(struct notifier_block *nb);
 164 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 165                              struct switchdev_notifier_info *info);
 166 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 167                                   struct net_device *dev, u32 filter_mask,
 168                                   int nlflags);
 169 int switchdev_port_bridge_setlink(struct net_device *dev,
 170                                   struct nlmsghdr *nlh, u16 flags);
 171 int switchdev_port_bridge_dellink(struct net_device *dev,
 172                                   struct nlmsghdr *nlh, u16 flags);
 173 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 174                            u8 tos, u8 type, u32 nlflags, u32 tb_id);
 175 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
 176                            u8 tos, u8 type, u32 tb_id);
 177 void switchdev_fib_ipv4_abort(struct fib_info *fi);
 178 int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 179                            struct net_device *dev, const unsigned char *addr,
 180                            u16 vid, u16 nlm_flags);
 181 int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 182                            struct net_device *dev, const unsigned char *addr,
 183                            u16 vid);
 184 int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 185                             struct net_device *dev,
 186                             struct net_device *filter_dev, int idx);
 187 void switchdev_port_fwd_mark_set(struct net_device *dev,
 188                                  struct net_device *group_dev,
 189                                  bool joining);
 190
 191 #else
 192
 193 static inline int switchdev_port_attr_get(struct net_device *dev,
 194                                           struct switchdev_attr *attr)
 195 {
 196         return -EOPNOTSUPP;
 197 }
 198
 199 static inline int switchdev_port_attr_set(struct net_device *dev,
 200                                           struct switchdev_attr *attr)
 201 {
 202         return -EOPNOTSUPP;
 203 }
 204
 205 static inline int switchdev_port_obj_add(struct net_device *dev,
 206                                          enum switchdev_obj_id id,
 207                                          const void *obj)
 208 {
 209         return -EOPNOTSUPP;
 210 }
 211
 212 static inline int switchdev_port_obj_del(struct net_device *dev,
 213                                          enum switchdev_obj_id id,
 214                                          const void *obj)
 215 {
 216         return -EOPNOTSUPP;
 217 }
 218
 219 static inline int switchdev_port_obj_dump(struct net_device *dev,
 220                                           enum switchdev_obj_id id, void *obj,
 221                                           int (*cb)(void *obj))
 222 {
 223         return -EOPNOTSUPP;
 224 }
 225
 226 static inline int register_switchdev_notifier(struct notifier_block *nb)
 227 {
 228         return 0;
 229 }
 230
 231 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 232 {
 233         return 0;
 234 }
 235
 236 static inline int call_switchdev_notifiers(unsigned long val,
 237                                            struct net_device *dev,
 238                                            struct switchdev_notifier_info *info)
 239 {
 240         return NOTIFY_DONE;
 241 }
 242
 243 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
 244                                             u32 seq, struct net_device *dev,
 245                                             u32 filter_mask, int nlflags)
 246 {
 247         return -EOPNOTSUPP;
 248 }
 249
 250 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
 251                                                 struct nlmsghdr *nlh,
 252                                                 u16 flags)
 253 {
 254         return -EOPNOTSUPP;
 255 }
 256
 257 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
 258                                                 struct nlmsghdr *nlh,
 259                                                 u16 flags)
 260 {
 261         return -EOPNOTSUPP;
 262 }
 263
 264 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
 265                                          struct fib_info *fi,
 266                                          u8 tos, u8 type,
 267                                          u32 nlflags, u32 tb_id)
 268 {
 269         return 0;
 270 }
 271
 272 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
 273                                          struct fib_info *fi,
 274                                          u8 tos, u8 type, u32 tb_id)
 275 {
 276         return 0;
 277 }
 278
 279 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
 280 {
 281 }
 282
 283 static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 284                                          struct net_device *dev,
 285                                          const unsigned char *addr,
 286                                          u16 vid, u16 nlm_flags)
 287 {
 288         return -EOPNOTSUPP;
 289 }
 290
 291 static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 292                                          struct net_device *dev,
 293                                          const unsigned char *addr, u16 vid)
 294 {
 295         return -EOPNOTSUPP;
 296 }
 297
 298 static inline int switchdev_port_fdb_dump(struct sk_buff *skb,
 299                                           struct netlink_callback *cb,
 300                                           struct net_device *dev,
 301                                           struct net_device *filter_dev,
 302                                           int idx)
 303 {
 304         return -EOPNOTSUPP;
 305 }
 306
 307 static inline void switchdev_port_fwd_mark_set(struct net_device *dev,
 308                                                struct net_device *group_dev,
 309                                                bool joining)
 310 {
 311 }
 312
 313 #endif
 314
 315 #endif /* _LINUX_SWITCHDEV_H_ */