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         int                     slave_maxtype;
  84         const struct nla_policy *slave_policy;
  85         int                     (*slave_validate)(struct nlattr *tb[],
  86                                                   struct nlattr *data[]);
  87         int                     (*slave_changelink)(struct net_device *dev,
  88                                                     struct net_device *slave_dev,
  89                                                     struct nlattr *tb[],
  90                                                     struct nlattr *data[]);
  91         size_t                  (*get_slave_size)(const struct net_device *dev,
  92                                                   const struct net_device *slave_dev);
  93         int                     (*fill_slave_info)(struct sk_buff *skb,
  94                                                    const struct net_device *dev,
  95                                                    const struct net_device *slave_dev);
  96 } __do_const;
  97
  98 int __rtnl_link_register(struct rtnl_link_ops *ops);
  99 void __rtnl_link_unregister(struct rtnl_link_ops *ops);
 100
 101 int rtnl_link_register(struct rtnl_link_ops *ops);
 102 void rtnl_link_unregister(struct rtnl_link_ops *ops);
 103
 104 /**
 105  *      struct rtnl_af_ops - rtnetlink address family operations
 106  *
 107  *      @list: Used internally
 108  *      @family: Address family
 109  *      @fill_link_af: Function to fill IFLA_AF_SPEC with address family
 110  *                     specific netlink attributes.
 111  *      @get_link_af_size: Function to calculate size of address family specific
 112  *                         netlink attributes.
 113  *      @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
 114  *                         for invalid configuration settings.
 115  *      @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
 116  *                    net_device accordingly.
 117  */
 118 struct rtnl_af_ops {
 119         struct list_head        list;
 120         int                     family;
 121
 122         int                     (*fill_link_af)(struct sk_buff *skb,
 123                                                 const struct net_device *dev);
 124         size_t                  (*get_link_af_size)(const struct net_device *dev);
 125
 126         int                     (*validate_link_af)(const struct net_device *dev,
 127                                                     const struct nlattr *attr);
 128         int                     (*set_link_af)(struct net_device *dev,
 129                                                const struct nlattr *attr);
 130 };
 131
 132 void __rtnl_af_unregister(struct rtnl_af_ops *ops);
 133
 134 void rtnl_af_register(struct rtnl_af_ops *ops);
 135 void rtnl_af_unregister(struct rtnl_af_ops *ops);
 136
 137 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
 138 struct net_device *rtnl_create_link(struct net *net, char *ifname,
 139                                     unsigned char name_assign_type,
 140                                     const struct rtnl_link_ops *ops,
 141                                     struct nlattr *tb[]);
 142 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
 143
 144 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len);
 145
 146 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
 147
 148 #endif