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(const 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 *src_net,
  59                                            struct net_device *dev,
  60                                            struct nlattr *tb[],
  61                                            struct nlattr *data[]);
  62         int                     (*changelink)(struct net_device *dev,
  63                                               struct nlattr *tb[],
  64                                               struct nlattr *data[]);
  65         void                    (*dellink)(struct net_device *dev,
  66                                            struct list_head *head);
  67
  68         size_t                  (*get_size)(const struct net_device *dev);
  69         int                     (*fill_info)(struct sk_buff *skb,
  70                                              const struct net_device *dev);
  71
  72         size_t                  (*get_xstats_size)(const struct net_device *dev);
  73         int                     (*fill_xstats)(struct sk_buff *skb,
  74                                                const struct net_device *dev);
  75         int                     (*get_tx_queues)(struct net *net, struct nlattr *tb[],
  76                                                  unsigned int *tx_queues,
  77                                                  unsigned int *real_tx_queues);
  78 };
  79
  80 extern int      __rtnl_link_register(struct rtnl_link_ops *ops);
  81 extern void     __rtnl_link_unregister(struct rtnl_link_ops *ops);
  82
  83 extern int      rtnl_link_register(struct rtnl_link_ops *ops);
  84 extern void     rtnl_link_unregister(struct rtnl_link_ops *ops);
  85
  86 /**
  87  *      struct rtnl_af_ops - rtnetlink address family operations
  88  *
  89  *      @list: Used internally
  90  *      @family: Address family
  91  *      @fill_link_af: Function to fill IFLA_AF_SPEC with address family
  92  *                     specific netlink attributes.
  93  *      @get_link_af_size: Function to calculate size of address family specific
  94  *                         netlink attributes exlusive the container attribute.
  95  *      @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
  96  *                         for invalid configuration settings.
  97  *      @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
  98  *                    net_device accordingly.
  99  */
 100 struct rtnl_af_ops {
 101         struct list_head        list;
 102         int                     family;
 103
 104         int                     (*fill_link_af)(struct sk_buff *skb,
 105                                                 const struct net_device *dev);
 106         size_t                  (*get_link_af_size)(const struct net_device *dev);
 107
 108         int                     (*validate_link_af)(const struct net_device *dev,
 109                                                     const struct nlattr *attr);
 110         int                     (*set_link_af)(struct net_device *dev,
 111                                                const struct nlattr *attr);
 112 };
 113
 114 extern int      __rtnl_af_register(struct rtnl_af_ops *ops);
 115 extern void     __rtnl_af_unregister(struct rtnl_af_ops *ops);
 116
 117 extern int      rtnl_af_register(struct rtnl_af_ops *ops);
 118 extern void     rtnl_af_unregister(struct rtnl_af_ops *ops);
 119
 120
 121 extern struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
 122 extern struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
 123         char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]);
 124 extern int rtnl_configure_link(struct net_device *dev,
 125                                const struct ifinfomsg *ifm);
 126 extern const struct nla_policy ifla_policy[IFLA_MAX+1];
 127
 128 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
 129
 130 #endif