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  *      @get_link_net: Function to get the i/o netns of the device
  50  */
  51 struct rtnl_link_ops {
  52         struct list_head        list;
  53
  54         const char              *kind;
  55
  56         size_t                  priv_size;
  57         void                    (*setup)(struct net_device *dev);
  58
  59         int                     maxtype;
  60         const struct nla_policy *policy;
  61         int                     (*validate)(struct nlattr *tb[],
  62                                             struct nlattr *data[]);
  63
  64         int                     (*newlink)(struct net *src_net,
  65                                            struct net_device *dev,
  66                                            struct nlattr *tb[],
  67                                            struct nlattr *data[]);
  68         int                     (*changelink)(struct net_device *dev,
  69                                               struct nlattr *tb[],
  70                                               struct nlattr *data[]);
  71         void                    (*dellink)(struct net_device *dev,
  72                                            struct list_head *head);
  73
  74         size_t                  (*get_size)(const struct net_device *dev);
  75         int                     (*fill_info)(struct sk_buff *skb,
  76                                              const struct net_device *dev);
  77
  78         size_t                  (*get_xstats_size)(const struct net_device *dev);
  79         int                     (*fill_xstats)(struct sk_buff *skb,
  80                                                const struct net_device *dev);
  81         unsigned int            (*get_num_tx_queues)(void);
  82         unsigned int            (*get_num_rx_queues)(void);
  83
  84         int                     slave_maxtype;
  85         const struct nla_policy *slave_policy;
  86         int                     (*slave_validate)(struct nlattr *tb[],
  87                                                   struct nlattr *data[]);
  88         int                     (*slave_changelink)(struct net_device *dev,
  89                                                     struct net_device *slave_dev,
  90                                                     struct nlattr *tb[],
  91                                                     struct nlattr *data[]);
  92         size_t                  (*get_slave_size)(const struct net_device *dev,
  93                                                   const struct net_device *slave_dev);
  94         int                     (*fill_slave_info)(struct sk_buff *skb,
  95                                                    const struct net_device *dev,
  96                                                    const struct net_device *slave_dev);
  97         struct net              *(*get_link_net)(const struct net_device *dev);
  98 };
  99
 100 int __rtnl_link_register(struct rtnl_link_ops *ops);
 101 void __rtnl_link_unregister(struct rtnl_link_ops *ops);
 102
 103 int rtnl_link_register(struct rtnl_link_ops *ops);
 104 void rtnl_link_unregister(struct rtnl_link_ops *ops);
 105
 106 /**
 107  *      struct rtnl_af_ops - rtnetlink address family operations
 108  *
 109  *      @list: Used internally
 110  *      @family: Address family
 111  *      @fill_link_af: Function to fill IFLA_AF_SPEC with address family
 112  *                     specific netlink attributes.
 113  *      @get_link_af_size: Function to calculate size of address family specific
 114  *                         netlink attributes.
 115  *      @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
 116  *                         for invalid configuration settings.
 117  *      @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
 118  *                    net_device accordingly.
 119  */
 120 struct rtnl_af_ops {
 121         struct list_head        list;
 122         int                     family;
 123
 124         int                     (*fill_link_af)(struct sk_buff *skb,
 125                                                 const struct net_device *dev);
 126         size_t                  (*get_link_af_size)(const struct net_device *dev);
 127
 128         int                     (*validate_link_af)(const struct net_device *dev,
 129                                                     const struct nlattr *attr);
 130         int                     (*set_link_af)(struct net_device *dev,
 131                                                const struct nlattr *attr);
 132 };
 133
 134 void __rtnl_af_unregister(struct rtnl_af_ops *ops);
 135
 136 void rtnl_af_register(struct rtnl_af_ops *ops);
 137 void rtnl_af_unregister(struct rtnl_af_ops *ops);
 138
 139 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
 140 struct net_device *rtnl_create_link(struct net *net, const char *ifname,
 141                                     unsigned char name_assign_type,
 142                                     const struct rtnl_link_ops *ops,
 143                                     struct nlattr *tb[]);
 144 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
 145
 146 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len);
 147
 148 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
 149
 150 #endif