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                               struct netlink_ext_ack *);
   9 typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
  10 typedef u16 (*rtnl_calcit_func)(struct sk_buff *, struct nlmsghdr *);
  11
  12 int __rtnl_register(int protocol, int msgtype,
  13                     rtnl_doit_func, rtnl_dumpit_func, rtnl_calcit_func);
  14 void rtnl_register(int protocol, int msgtype,
  15                    rtnl_doit_func, rtnl_dumpit_func, rtnl_calcit_func);
  16 int rtnl_unregister(int protocol, int msgtype);
  17 void rtnl_unregister_all(int protocol);
  18
  19 static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
  20 {
  21         if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
  22                 return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
  23         else
  24                 return AF_UNSPEC;
  25 }
  26
  27 /**
  28  *      struct rtnl_link_ops - rtnetlink link operations
  29  *
  30  *      @list: Used internally
  31  *      @kind: Identifier
  32  *      @maxtype: Highest device specific netlink attribute number
  33  *      @policy: Netlink policy for device specific attribute validation
  34  *      @validate: Optional validation function for netlink/changelink parameters
  35  *      @priv_size: sizeof net_device private space
  36  *      @setup: net_device setup function
  37  *      @newlink: Function for configuring and registering a new device
  38  *      @changelink: Function for changing parameters of an existing device
  39  *      @dellink: Function to remove a device
  40  *      @get_size: Function to calculate required room for dumping device
  41  *                 specific netlink attributes
  42  *      @fill_info: Function to dump device specific netlink attributes
  43  *      @get_xstats_size: Function to calculate required room for dumping device
  44  *                        specific statistics
  45  *      @fill_xstats: Function to dump device specific statistics
  46  *      @get_num_tx_queues: Function to determine number of transmit queues
  47  *                          to create when creating a new device.
  48  *      @get_num_rx_queues: Function to determine number of receive queues
  49  *                          to create when creating a new device.
  50  *      @get_link_net: Function to get the i/o netns of the device
  51  *      @get_linkxstats_size: Function to calculate the required room for
  52  *                            dumping device-specific extended link stats
  53  *      @fill_linkxstats: Function to dump device-specific extended link stats
  54  */
  55 struct rtnl_link_ops {
  56         struct list_head        list;
  57
  58         const char              *kind;
  59
  60         size_t                  priv_size;
  61         void                    (*setup)(struct net_device *dev);
  62
  63         int                     maxtype;
  64         const struct nla_policy *policy;
  65         int                     (*validate)(struct nlattr *tb[],
  66                                             struct nlattr *data[]);
  67
  68         int                     (*newlink)(struct net *src_net,
  69                                            struct net_device *dev,
  70                                            struct nlattr *tb[],
  71                                            struct nlattr *data[]);
  72         int                     (*changelink)(struct net_device *dev,
  73                                               struct nlattr *tb[],
  74                                               struct nlattr *data[]);
  75         void                    (*dellink)(struct net_device *dev,
  76                                            struct list_head *head);
  77
  78         size_t                  (*get_size)(const struct net_device *dev);
  79         int                     (*fill_info)(struct sk_buff *skb,
  80                                              const struct net_device *dev);
  81
  82         size_t                  (*get_xstats_size)(const struct net_device *dev);
  83         int                     (*fill_xstats)(struct sk_buff *skb,
  84                                                const struct net_device *dev);
  85         unsigned int            (*get_num_tx_queues)(void);
  86         unsigned int            (*get_num_rx_queues)(void);
  87
  88         int                     slave_maxtype;
  89         const struct nla_policy *slave_policy;
  90         int                     (*slave_validate)(struct nlattr *tb[],
  91                                                   struct nlattr *data[]);
  92         int                     (*slave_changelink)(struct net_device *dev,
  93                                                     struct net_device *slave_dev,
  94                                                     struct nlattr *tb[],
  95                                                     struct nlattr *data[]);
  96         size_t                  (*get_slave_size)(const struct net_device *dev,
  97                                                   const struct net_device *slave_dev);
  98         int                     (*fill_slave_info)(struct sk_buff *skb,
  99                                                    const struct net_device *dev,
 100                                                    const struct net_device *slave_dev);
 101         struct net              *(*get_link_net)(const struct net_device *dev);
 102         size_t                  (*get_linkxstats_size)(const struct net_device *dev,
 103                                                        int attr);
 104         int                     (*fill_linkxstats)(struct sk_buff *skb,
 105                                                    const struct net_device *dev,
 106                                                    int *prividx, int attr);
 107 };
 108
 109 int __rtnl_link_register(struct rtnl_link_ops *ops);
 110 void __rtnl_link_unregister(struct rtnl_link_ops *ops);
 111
 112 int rtnl_link_register(struct rtnl_link_ops *ops);
 113 void rtnl_link_unregister(struct rtnl_link_ops *ops);
 114
 115 /**
 116  *      struct rtnl_af_ops - rtnetlink address family operations
 117  *
 118  *      @list: Used internally
 119  *      @family: Address family
 120  *      @fill_link_af: Function to fill IFLA_AF_SPEC with address family
 121  *                     specific netlink attributes.
 122  *      @get_link_af_size: Function to calculate size of address family specific
 123  *                         netlink attributes.
 124  *      @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
 125  *                         for invalid configuration settings.
 126  *      @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
 127  *                    net_device accordingly.
 128  */
 129 struct rtnl_af_ops {
 130         struct list_head        list;
 131         int                     family;
 132
 133         int                     (*fill_link_af)(struct sk_buff *skb,
 134                                                 const struct net_device *dev,
 135                                                 u32 ext_filter_mask);
 136         size_t                  (*get_link_af_size)(const struct net_device *dev,
 137                                                     u32 ext_filter_mask);
 138
 139         int                     (*validate_link_af)(const struct net_device *dev,
 140                                                     const struct nlattr *attr);
 141         int                     (*set_link_af)(struct net_device *dev,
 142                                                const struct nlattr *attr);
 143
 144         int                     (*fill_stats_af)(struct sk_buff *skb,
 145                                                  const struct net_device *dev);
 146         size_t                  (*get_stats_af_size)(const struct net_device *dev);
 147 };
 148
 149 void __rtnl_af_unregister(struct rtnl_af_ops *ops);
 150
 151 void rtnl_af_register(struct rtnl_af_ops *ops);
 152 void rtnl_af_unregister(struct rtnl_af_ops *ops);
 153
 154 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
 155 struct net_device *rtnl_create_link(struct net *net, const char *ifname,
 156                                     unsigned char name_assign_type,
 157                                     const struct rtnl_link_ops *ops,
 158                                     struct nlattr *tb[]);
 159 int rtnl_delete_link(struct net_device *dev);
 160 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
 161
 162 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
 163                         struct netlink_ext_ack *exterr);
 164
 165 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
 166
 167 #endif