include/net/rtnetlink.h

   1 #ifndef __NET_RTNETLINK_H
   2 #define __NET_RTNETLINK_H
   3
   4 #include <linux/rtnetlink.h>
   5 #include <net/netlink.h>
   6
   7 typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *, void *);
   8 typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
   9
  10 extern int      __rtnl_register(int protocol, int msgtype,
  11                                 rtnl_doit_func, rtnl_dumpit_func);
  12 extern void     rtnl_register(int protocol, int msgtype,
  13                               rtnl_doit_func, rtnl_dumpit_func);
  14 extern int      rtnl_unregister(int protocol, int msgtype);
  15 extern void     rtnl_unregister_all(int protocol);
  16
  17 static inline int rtnl_msg_family(struct nlmsghdr *nlh)
  18 {
  19         if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
  20                 return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
  21         else
  22                 return AF_UNSPEC;
  23 }
  24
  25 /**
  26  *      struct rtnl_link_ops - rtnetlink link operations
  27  *
  28  *      @list: Used internally
  29  *      @kind: Identifier
  30  *      @maxtype: Highest device specific netlink attribute number
  31  *      @policy: Netlink policy for device specific attribute validation
  32  *      @validate: Optional validation function for netlink/changelink parameters
  33  *      @priv_size: sizeof net_device private space
  34  *      @setup: net_device setup function
  35  *      @newlink: Function for configuring and registering a new device
  36  *      @changelink: Function for changing parameters of an existing device
  37  *      @dellink: Function to remove a device
  38  *      @get_size: Function to calculate required room for dumping device
  39  *                 specific netlink attributes
  40  *      @fill_info: Function to dump device specific netlink attributes
  41  *      @get_xstats_size: Function to calculate required room for dumping devic
  42  *                        specific statistics
  43  *      @fill_xstats: Function to dump device specific statistics
  44  */
  45 struct rtnl_link_ops {
  46         struct list_head        list;
  47
  48         const char              *kind;
  49
  50         size_t                  priv_size;
  51         void                    (*setup)(struct net_device *dev);
  52
  53         int                     maxtype;
  54         const struct nla_policy *policy;
  55         int                     (*validate)(struct nlattr *tb[],
  56                                             struct nlattr *data[]);
  57
  58         int                     (*newlink)(struct net_device *dev,
  59                                            struct nlattr *tb[],
  60                                            struct nlattr *data[]);
  61         int                     (*changelink)(struct net_device *dev,
  62                                               struct nlattr *tb[],
  63                                               struct nlattr *data[]);
  64         void                    (*dellink)(struct net_device *dev);
  65
  66         size_t                  (*get_size)(const struct net_device *dev);
  67         int                     (*fill_info)(struct sk_buff *skb,
  68                                              const struct net_device *dev);
  69
  70         size_t                  (*get_xstats_size)(const struct net_device *dev);
  71         int                     (*fill_xstats)(struct sk_buff *skb,
  72                                                const struct net_device *dev);
  73 };
  74
  75 extern int      __rtnl_link_register(struct rtnl_link_ops *ops);
  76 extern void     __rtnl_link_unregister(struct rtnl_link_ops *ops);
  77
  78 extern int      rtnl_link_register(struct rtnl_link_ops *ops);
  79 extern void     rtnl_link_unregister(struct rtnl_link_ops *ops);
  80
  81 extern struct net_device *rtnl_create_link(struct net *net, char *ifname,
  82                 const struct rtnl_link_ops *ops, struct nlattr *tb[]);
  83 extern const struct nla_policy ifla_policy[IFLA_MAX+1];
  84
  85 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
  86
  87 #endif