lib/netdev-linux.h

   1 /*
   2  * Copyright (c) 2009 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef NETDEV_LINUX_H
  18 #define NETDEV_LINUX_H 1
  19
  20 /* These functions are specific to the Linux implementation of dpif and netdev.
  21  * They should only be used directly by Linux-specific code. */
  22
  23 #include "list.h"
  24
  25 struct linux_netdev_change {
  26     /* Copied from struct nlmsghdr. */
  27     int nlmsg_type;             /* e.g. RTM_NEWLINK, RTM_DELLINK. */
  28
  29     /* Copied from struct ifinfomsg. */
  30     int ifi_index;              /* Index of network device. */
  31
  32     /* Extracted from Netlink attributes. */
  33     const char *ifname;         /* Name of network device. */
  34     int master_ifindex;         /* Ifindex of datapath master (0 if none). */
  35 };
  36
  37 typedef void linux_netdev_notify_func(const struct linux_netdev_change *,
  38                                       void *aux);
  39
  40 struct linux_netdev_notifier {
  41     struct list node;
  42     linux_netdev_notify_func *cb;
  43     void *aux;
  44 };
  45
  46 int linux_netdev_notifier_register(struct linux_netdev_notifier *,
  47                                    linux_netdev_notify_func *, void *aux);
  48 void linux_netdev_notifier_unregister(struct linux_netdev_notifier *);
  49 void linux_netdev_notifier_run(void);
  50 void linux_netdev_notifier_wait(void);
  51
  52 #endif /* netdev-linux.h */