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
  11 enum rtnl_link_flags {
  12         RTNL_FLAG_DOIT_UNLOCKED = 1,
  13 };
  14
  15 int __rtnl_register(int protocol, int msgtype,
  16                     rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
  17 void rtnl_register(int protocol, int msgtype,
  18                    rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
  19 int rtnl_unregister(int protocol, int msgtype);
  20 void rtnl_unregister_all(int protocol);
  21
  22 static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
  23 {
  24         if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
  25                 return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
  26         else
  27                 return AF_UNSPEC;
  28 }
  29
  30 /**
  31  *      struct rtnl_link_ops - rtnetlink link operations
  32  *
  33  *      @list: Used internally
  34  *      @kind: Identifier
  35  *      @maxtype: Highest device specific netlink attribute number
  36  *      @policy: Netlink policy for device specific attribute validation
  37  *      @validate: Optional validation function for netlink/changelink parameters
  38  *      @priv_size: sizeof net_device private space
  39  *      @setup: net_device setup function
  40  *      @newlink: Function for configuring and registering a new device
  41  *      @changelink: Function for changing parameters of an existing device
  42  *      @dellink: Function to remove a device
  43  *      @get_size: Function to calculate required room for dumping device
  44  *                 specific netlink attributes
  45  *      @fill_info: Function to dump device specific netlink attributes
  46  *      @get_xstats_size: Function to calculate required room for dumping device
  47  *                        specific statistics
  48  *      @fill_xstats: Function to dump device specific statistics
  49  *      @get_num_tx_queues: Function to determine number of transmit queues
  50  *                          to create when creating a new device.
  51  *      @get_num_rx_queues: Function to determine number of receive queues
  52  *                          to create when creating a new device.
  53  *      @get_link_net: Function to get the i/o netns of the device
  54  *      @get_linkxstats_size: Function to calculate the required room for
  55  *                            dumping device-specific extended link stats
  56  *      @fill_linkxstats: Function to dump device-specific extended link stats
  57  */
  58 struct rtnl_link_ops {
  59         struct list_head        list;
  60
  61         const char              *kind;
  62
  63         size_t                  priv_size;
  64         void                    (*setup)(struct net_device *dev);
  65
  66         int                     maxtype;
  67         const struct nla_policy *policy;
  68         int                     (*validate)(struct nlattr *tb[],
  69                                             struct nlattr *data[],
  70                                             struct netlink_ext_ack *extack);
  71
  72         int                     (*newlink)(struct net *src_net,
  73                                            struct net_device *dev,
  74                                            struct nlattr *tb[],
  75                                            struct nlattr *data[],
  76                                            struct netlink_ext_ack *extack);
  77         int                     (*changelink)(struct net_device *dev,
  78                                               struct nlattr *tb[],
  79                                               struct nlattr *data[],
  80                                               struct netlink_ext_ack *extack);
  81         void                    (*dellink)(struct net_device *dev,
  82                                            struct list_head *head);
  83
  84         size_t                  (*get_size)(const struct net_device *dev);
  85         int                     (*fill_info)(struct sk_buff *skb,
  86                                              const struct net_device *dev);
  87
  88         size_t                  (*get_xstats_size)(const struct net_device *dev);
  89         int                     (*fill_xstats)(struct sk_buff *skb,
  90                                                const struct net_device *dev);
  91         unsigned int            (*get_num_tx_queues)(void);
  92         unsigned int            (*get_num_rx_queues)(void);
  93
  94         int                     slave_maxtype;
  95         const struct nla_policy *slave_policy;
  96         int                     (*slave_changelink)(struct net_device *dev,
  97                                                     struct net_device *slave_dev,
  98                                                     struct nlattr *tb[],
  99                                                     struct nlattr *data[],
 100                                                     struct netlink_ext_ack *extack);
 101         size_t                  (*get_slave_size)(const struct net_device *dev,
 102                                                   const struct net_device *slave_dev);
 103         int                     (*fill_slave_info)(struct sk_buff *skb,
 104                                                    const struct net_device *dev,
 105                                                    const struct net_device *slave_dev);
 106         struct net              *(*get_link_net)(const struct net_device *dev);
 107         size_t                  (*get_linkxstats_size)(const struct net_device *dev,
 108                                                        int attr);
 109         int                     (*fill_linkxstats)(struct sk_buff *skb,
 110                                                    const struct net_device *dev,
 111                                                    int *prividx, int attr);
 112 };
 113
 114 int __rtnl_link_register(struct rtnl_link_ops *ops);
 115 void __rtnl_link_unregister(struct rtnl_link_ops *ops);
 116
 117 int rtnl_link_register(struct rtnl_link_ops *ops);
 118 void rtnl_link_unregister(struct rtnl_link_ops *ops);
 119
 120 /**
 121  *      struct rtnl_af_ops - rtnetlink address family operations
 122  *
 123  *      @list: Used internally
 124  *      @family: Address family
 125  *      @fill_link_af: Function to fill IFLA_AF_SPEC with address family
 126  *                     specific netlink attributes.
 127  *      @get_link_af_size: Function to calculate size of address family specific
 128  *                         netlink attributes.
 129  *      @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
 130  *                         for invalid configuration settings.
 131  *      @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
 132  *                    net_device accordingly.
 133  */
 134 struct rtnl_af_ops {
 135         struct list_head        list;
 136         int                     family;
 137
 138         int                     (*fill_link_af)(struct sk_buff *skb,
 139                                                 const struct net_device *dev,
 140                                                 u32 ext_filter_mask);
 141         size_t                  (*get_link_af_size)(const struct net_device *dev,
 142                                                     u32 ext_filter_mask);
 143
 144         int                     (*validate_link_af)(const struct net_device *dev,
 145                                                     const struct nlattr *attr);
 146         int                     (*set_link_af)(struct net_device *dev,
 147                                                const struct nlattr *attr);
 148
 149         int                     (*fill_stats_af)(struct sk_buff *skb,
 150                                                  const struct net_device *dev);
 151         size_t                  (*get_stats_af_size)(const struct net_device *dev);
 152 };
 153
 154 void rtnl_af_register(struct rtnl_af_ops *ops);
 155 void rtnl_af_unregister(struct rtnl_af_ops *ops);
 156
 157 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
 158 struct net_device *rtnl_create_link(struct net *net, const char *ifname,
 159                                     unsigned char name_assign_type,
 160                                     const struct rtnl_link_ops *ops,
 161                                     struct nlattr *tb[]);
 162 int rtnl_delete_link(struct net_device *dev);
 163 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
 164
 165 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
 166                         struct netlink_ext_ack *exterr);
 167
 168 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
 169
 170 #endif