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