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 *, void *); 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 extern int __rtnl_register(int protocol, int msgtype, 12 rtnl_doit_func, rtnl_dumpit_func, 13 rtnl_calcit_func); 14 extern void rtnl_register(int protocol, int msgtype, 15 rtnl_doit_func, rtnl_dumpit_func, 16 rtnl_calcit_func); 17 extern int rtnl_unregister(int protocol, int msgtype); 18 extern void rtnl_unregister_all(int protocol); 19 20 static inline int rtnl_msg_family(const struct nlmsghdr *nlh) 21 { 22 if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg)) 23 return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family; 24 else 25 return AF_UNSPEC; 26 } 27 28 /** 29 * struct rtnl_link_ops - rtnetlink link operations 30 * 31 * @list: Used internally 32 * @kind: Identifier 33 * @maxtype: Highest device specific netlink attribute number 34 * @policy: Netlink policy for device specific attribute validation 35 * @validate: Optional validation function for netlink/changelink parameters 36 * @priv_size: sizeof net_device private space 37 * @setup: net_device setup function 38 * @newlink: Function for configuring and registering a new device 39 * @changelink: Function for changing parameters of an existing device 40 * @dellink: Function to remove a device 41 * @get_size: Function to calculate required room for dumping device 42 * specific netlink attributes 43 * @fill_info: Function to dump device specific netlink attributes 44 * @get_xstats_size: Function to calculate required room for dumping device 45 * specific statistics 46 * @fill_xstats: Function to dump device specific statistics 47 * @get_num_tx_queues: Function to determine number of transmit queues 48 * to create when creating a new device. 49 * @get_num_rx_queues: Function to determine number of receive queues 50 * to create when creating a new device. 51 */ 52 struct rtnl_link_ops { 53 struct list_head list; 54 55 const char *kind; 56 57 size_t priv_size; 58 void (*setup)(struct net_device *dev); 59 60 int maxtype; 61 const struct nla_policy *policy; 62 int (*validate)(struct nlattr *tb[], 63 struct nlattr *data[]); 64 65 int (*newlink)(struct net *src_net, 66 struct net_device *dev, 67 struct nlattr *tb[], 68 struct nlattr *data[]); 69 int (*changelink)(struct net_device *dev, 70 struct nlattr *tb[], 71 struct nlattr *data[]); 72 void (*dellink)(struct net_device *dev, 73 struct list_head *head); 74 75 size_t (*get_size)(const struct net_device *dev); 76 int (*fill_info)(struct sk_buff *skb, 77 const struct net_device *dev); 78 79 size_t (*get_xstats_size)(const struct net_device *dev); 80 int (*fill_xstats)(struct sk_buff *skb, 81 const struct net_device *dev); 82 unsigned int (*get_num_tx_queues)(void); 83 unsigned int (*get_num_rx_queues)(void); 84 }; 85 86 extern int __rtnl_link_register(struct rtnl_link_ops *ops); 87 extern void __rtnl_link_unregister(struct rtnl_link_ops *ops); 88 89 extern int rtnl_link_register(struct rtnl_link_ops *ops); 90 extern void rtnl_link_unregister(struct rtnl_link_ops *ops); 91 92 /** 93 * struct rtnl_af_ops - rtnetlink address family operations 94 * 95 * @list: Used internally 96 * @family: Address family 97 * @fill_link_af: Function to fill IFLA_AF_SPEC with address family 98 * specific netlink attributes. 99 * @get_link_af_size: Function to calculate size of address family specific 100 * netlink attributes. 101 * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr 102 * for invalid configuration settings. 103 * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify 104 * net_device accordingly. 105 */ 106 struct rtnl_af_ops { 107 struct list_head list; 108 int family; 109 110 int (*fill_link_af)(struct sk_buff *skb, 111 const struct net_device *dev); 112 size_t (*get_link_af_size)(const struct net_device *dev); 113 114 int (*validate_link_af)(const struct net_device *dev, 115 const struct nlattr *attr); 116 int (*set_link_af)(struct net_device *dev, 117 const struct nlattr *attr); 118 }; 119 120 extern int __rtnl_af_register(struct rtnl_af_ops *ops); 121 extern void __rtnl_af_unregister(struct rtnl_af_ops *ops); 122 123 extern int rtnl_af_register(struct rtnl_af_ops *ops); 124 extern void rtnl_af_unregister(struct rtnl_af_ops *ops); 125 126 127 extern struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]); 128 extern struct net_device *rtnl_create_link(struct net *net, 129 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]); 130 extern int rtnl_configure_link(struct net_device *dev, 131 const struct ifinfomsg *ifm); 132 extern const struct nla_policy ifla_policy[IFLA_MAX+1]; 133 134 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind) 135 136 #endif 137