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 typedef u16 (*rtnl_calcit_func)(struct sk_buff *, struct nlmsghdr *);
  10
  11 extern int      __rtnl_register(int protocol, int msgtype,
  12                                 rtnl_doit_func, rtnl_dumpit_func,
  13                                 rtnl_calcit_func);
  14 extern void     rtnl_register(int protocol, int msgtype,
  15                               rtnl_doit_func, rtnl_dumpit_func,
  16                               rtnl_calcit_func);
  17 extern int      rtnl_unregister(int protocol, int msgtype);
  18 extern void     rtnl_unregister_all(int protocol);
  19
  20 static 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 devic
  45  *                        specific statistics
  46  *      @fill_xstats: Function to dump device specific statistics
  47  */
  48 struct rtnl_link_ops {
  49         struct list_head        list;
  50
  51         const char              *kind;
  52
  53         size_t                  priv_size;
  54         void                    (*setup)(struct net_device *dev);
  55
  56         int                     maxtype;
  57         const struct nla_policy *policy;
  58         int                     (*validate)(struct nlattr *tb[],
  59                                             struct nlattr *data[]);
  60
  61         int                     (*newlink)(struct net *src_net,
  62                                            struct net_device *dev,
  63                                            struct nlattr *tb[],
  64                                            struct nlattr *data[]);
  65         int                     (*changelink)(struct net_device *dev,
  66                                               struct nlattr *tb[],
  67                                               struct nlattr *data[]);
  68         void                    (*dellink)(struct net_device *dev,
  69                                            struct list_head *head);
  70
  71         size_t                  (*get_size)(const struct net_device *dev);
  72         int                     (*fill_info)(struct sk_buff *skb,
  73                                              const struct net_device *dev);
  74
  75         size_t                  (*get_xstats_size)(const struct net_device *dev);
  76         int                     (*fill_xstats)(struct sk_buff *skb,
  77                                                const struct net_device *dev);
  78         int                     (*get_tx_queues)(struct net *net, struct nlattr *tb[],
  79                                                  unsigned int *tx_queues,
  80                                                  unsigned int *real_tx_queues);
  81 };
  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 extern int      rtnl_link_register(struct rtnl_link_ops *ops);
  87 extern void     rtnl_link_unregister(struct rtnl_link_ops *ops);
  88
  89 /**
  90  *      struct rtnl_af_ops - rtnetlink address family operations
  91  *
  92  *      @list: Used internally
  93  *      @family: Address family
  94  *      @fill_link_af: Function to fill IFLA_AF_SPEC with address family
  95  *                     specific netlink attributes.
  96  *      @get_link_af_size: Function to calculate size of address family specific
  97  *                         netlink attributes exlusive the container attribute.
  98  *      @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
  99  *                         for invalid configuration settings.
 100  *      @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
 101  *                    net_device accordingly.
 102  */
 103 struct rtnl_af_ops {
 104         struct list_head        list;
 105         int                     family;
 106
 107         int                     (*fill_link_af)(struct sk_buff *skb,
 108                                                 const struct net_device *dev);
 109         size_t                  (*get_link_af_size)(const struct net_device *dev);
 110
 111         int                     (*validate_link_af)(const struct net_device *dev,
 112                                                     const struct nlattr *attr);
 113         int                     (*set_link_af)(struct net_device *dev,
 114                                                const struct nlattr *attr);
 115 };
 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 extern int      rtnl_af_register(struct rtnl_af_ops *ops);
 121 extern void     rtnl_af_unregister(struct rtnl_af_ops *ops);
 122
 123
 124 extern struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
 125 extern struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
 126         char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]);
 127 extern int rtnl_configure_link(struct net_device *dev,
 128                                const struct ifinfomsg *ifm);
 129 extern const struct nla_policy ifla_policy[IFLA_MAX+1];
 130
 131 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
 132
 133 #endif