linux/include/net/rtnetlink.h
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   1#ifndef __NET_RTNETLINK_H
   2#define __NET_RTNETLINK_H
   3
   4#include <linux/rtnetlink.h>
   5#include <net/netlink.h>
   6
   7typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *, void *);
   8typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
   9typedef u16 (*rtnl_calcit_func)(struct sk_buff *, struct nlmsghdr *);
  10
  11extern int      __rtnl_register(int protocol, int msgtype,
  12                                rtnl_doit_func, rtnl_dumpit_func,
  13                                rtnl_calcit_func);
  14extern void     rtnl_register(int protocol, int msgtype,
  15                              rtnl_doit_func, rtnl_dumpit_func,
  16                              rtnl_calcit_func);
  17extern int      rtnl_unregister(int protocol, int msgtype);
  18extern void     rtnl_unregister_all(int protocol);
  19
  20static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
  21{
  22        if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
  23                return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
  24        else
  25                return AF_UNSPEC;
  26}
  27
  28/**
  29 *      struct rtnl_link_ops - rtnetlink link operations
  30 *
  31 *      @list: Used internally
  32 *      @kind: Identifier
  33 *      @maxtype: Highest device specific netlink attribute number
  34 *      @policy: Netlink policy for device specific attribute validation
  35 *      @validate: Optional validation function for netlink/changelink parameters
  36 *      @priv_size: sizeof net_device private space
  37 *      @setup: net_device setup function
  38 *      @newlink: Function for configuring and registering a new device
  39 *      @changelink: Function for changing parameters of an existing device
  40 *      @dellink: Function to remove a device
  41 *      @get_size: Function to calculate required room for dumping device
  42 *                 specific netlink attributes
  43 *      @fill_info: Function to dump device specific netlink attributes
  44 *      @get_xstats_size: Function to calculate required room for dumping device
  45 *                        specific statistics
  46 *      @fill_xstats: Function to dump device specific statistics
  47 *      @get_num_tx_queues: Function to determine number of transmit queues
  48 *                          to create when creating a new device.
  49 *      @get_num_rx_queues: Function to determine number of receive queues
  50 *                          to create when creating a new device.
  51 */
  52struct rtnl_link_ops {
  53        struct list_head        list;
  54
  55        const char              *kind;
  56
  57        size_t                  priv_size;
  58        void                    (*setup)(struct net_device *dev);
  59
  60        int                     maxtype;
  61        const struct nla_policy *policy;
  62        int                     (*validate)(struct nlattr *tb[],
  63                                            struct nlattr *data[]);
  64
  65        int                     (*newlink)(struct net *src_net,
  66                                           struct net_device *dev,
  67                                           struct nlattr *tb[],
  68                                           struct nlattr *data[]);
  69        int                     (*changelink)(struct net_device *dev,
  70                                              struct nlattr *tb[],
  71                                              struct nlattr *data[]);
  72        void                    (*dellink)(struct net_device *dev,
  73                                           struct list_head *head);
  74
  75        size_t                  (*get_size)(const struct net_device *dev);
  76        int                     (*fill_info)(struct sk_buff *skb,
  77                                             const struct net_device *dev);
  78
  79        size_t                  (*get_xstats_size)(const struct net_device *dev);
  80        int                     (*fill_xstats)(struct sk_buff *skb,
  81                                               const struct net_device *dev);
  82        unsigned int            (*get_num_tx_queues)(void);
  83        unsigned int            (*get_num_rx_queues)(void);
  84};
  85
  86extern int      __rtnl_link_register(struct rtnl_link_ops *ops);
  87extern void     __rtnl_link_unregister(struct rtnl_link_ops *ops);
  88
  89extern int      rtnl_link_register(struct rtnl_link_ops *ops);
  90extern void     rtnl_link_unregister(struct rtnl_link_ops *ops);
  91
  92/**
  93 *      struct rtnl_af_ops - rtnetlink address family operations
  94 *
  95 *      @list: Used internally
  96 *      @family: Address family
  97 *      @fill_link_af: Function to fill IFLA_AF_SPEC with address family
  98 *                     specific netlink attributes.
  99 *      @get_link_af_size: Function to calculate size of address family specific
 100 *                         netlink attributes.
 101 *      @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
 102 *                         for invalid configuration settings.
 103 *      @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
 104 *                    net_device accordingly.
 105 */
 106struct rtnl_af_ops {
 107        struct list_head        list;
 108        int                     family;
 109
 110        int                     (*fill_link_af)(struct sk_buff *skb,
 111                                                const struct net_device *dev);
 112        size_t                  (*get_link_af_size)(const struct net_device *dev);
 113
 114        int                     (*validate_link_af)(const struct net_device *dev,
 115                                                    const struct nlattr *attr);
 116        int                     (*set_link_af)(struct net_device *dev,
 117                                               const struct nlattr *attr);
 118};
 119
 120extern int      __rtnl_af_register(struct rtnl_af_ops *ops);
 121extern void     __rtnl_af_unregister(struct rtnl_af_ops *ops);
 122
 123extern int      rtnl_af_register(struct rtnl_af_ops *ops);
 124extern void     rtnl_af_unregister(struct rtnl_af_ops *ops);
 125
 126
 127extern struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
 128extern struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
 129        char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]);
 130extern int rtnl_configure_link(struct net_device *dev,
 131                               const struct ifinfomsg *ifm);
 132extern const struct nla_policy ifla_policy[IFLA_MAX+1];
 133
 134#define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
 135
 136#endif
 137
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