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 *);
   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 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  */
  52 struct 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
  86 extern int      __rtnl_link_register(struct rtnl_link_ops *ops);
  87 extern void     __rtnl_link_unregister(struct rtnl_link_ops *ops);
  88
  89 extern int      rtnl_link_register(struct rtnl_link_ops *ops);
  90 extern 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  */
 106 struct 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
 120 extern int      __rtnl_af_register(struct rtnl_af_ops *ops);
 121 extern void     __rtnl_af_unregister(struct rtnl_af_ops *ops);
 122
 123 extern int      rtnl_af_register(struct rtnl_af_ops *ops);
 124 extern void     rtnl_af_unregister(struct rtnl_af_ops *ops);
 125
 126
 127 extern struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
 128 extern struct net_device *rtnl_create_link(struct net *net,
 129         char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]);
 130 extern int rtnl_configure_link(struct net_device *dev,
 131                                const struct ifinfomsg *ifm);
 132 extern 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