root/include/net/rtnetlink.h

INCLUDED FROM

DEFINITIONS

1. rtnl_msg_family

#ifndef __NET_RTNETLINK_H
#define __NET_RTNETLINK_H

#include <linux/rtnetlink.h>
#include <net/netlink.h>

typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *, void *);
typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);

extern int      __rtnl_register(int protocol, int msgtype,
                                rtnl_doit_func, rtnl_dumpit_func);
extern void     rtnl_register(int protocol, int msgtype,
                              rtnl_doit_func, rtnl_dumpit_func);
extern int      rtnl_unregister(int protocol, int msgtype);
extern void     rtnl_unregister_all(int protocol);

static inline int rtnl_msg_family(struct nlmsghdr *nlh)
{
        if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
                return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
        else
                return AF_UNSPEC;
}

/**
 *      struct rtnl_link_ops - rtnetlink link operations
 *
 *      @list: Used internally
 *      @kind: Identifier
 *      @maxtype: Highest device specific netlink attribute number
 *      @policy: Netlink policy for device specific attribute validation
 *      @validate: Optional validation function for netlink/changelink parameters
 *      @priv_size: sizeof net_device private space
 *      @setup: net_device setup function
 *      @newlink: Function for configuring and registering a new device
 *      @changelink: Function for changing parameters of an existing device
 *      @dellink: Function to remove a device
 *      @get_size: Function to calculate required room for dumping device
 *                 specific netlink attributes
 *      @fill_info: Function to dump device specific netlink attributes
 *      @get_xstats_size: Function to calculate required room for dumping devic
 *                        specific statistics
 *      @fill_xstats: Function to dump device specific statistics
 */
struct rtnl_link_ops {
        struct list_head        list;

        const char              *kind;

        size_t                  priv_size;
        void                    (*setup)(struct net_device *dev);

        int                     maxtype;
        const struct nla_policy *policy;
        int                     (*validate)(struct nlattr *tb[],
                                            struct nlattr *data[]);

        int                     (*newlink)(struct net_device *dev,
                                           struct nlattr *tb[],
                                           struct nlattr *data[]);
        int                     (*changelink)(struct net_device *dev,
                                              struct nlattr *tb[],
                                              struct nlattr *data[]);
        void                    (*dellink)(struct net_device *dev);

        size_t                  (*get_size)(const struct net_device *dev);
        int                     (*fill_info)(struct sk_buff *skb,
                                             const struct net_device *dev);

        size_t                  (*get_xstats_size)(const struct net_device *dev);
        int                     (*fill_xstats)(struct sk_buff *skb,
                                               const struct net_device *dev);
};

extern int      __rtnl_link_register(struct rtnl_link_ops *ops);
extern void     __rtnl_link_unregister(struct rtnl_link_ops *ops);
extern void     rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops);

extern int      rtnl_link_register(struct rtnl_link_ops *ops);
extern void     rtnl_link_unregister(struct rtnl_link_ops *ops);

extern struct net_device *rtnl_create_link(struct net *net, char *ifname,
                const struct rtnl_link_ops *ops, struct nlattr *tb[]);
extern const struct nla_policy ifla_policy[IFLA_MAX+1];

#define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)

#endif