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 struct netlink_ext_ack *extack); 68 69 int (*newlink)(struct net *src_net, 70 struct net_device *dev, 71 struct nlattr *tb[], 72 struct nlattr *data[], 73 struct netlink_ext_ack *extack); 74 int (*changelink)(struct net_device *dev, 75 struct nlattr *tb[], 76 struct nlattr *data[], 77 struct netlink_ext_ack *extack); 78 void (*dellink)(struct net_device *dev, 79 struct list_head *head); 80 81 size_t (*get_size)(const struct net_device *dev); 82 int (*fill_info)(struct sk_buff *skb, 83 const struct net_device *dev); 84 85 size_t (*get_xstats_size)(const struct net_device *dev); 86 int (*fill_xstats)(struct sk_buff *skb, 87 const struct net_device *dev); 88 unsigned int (*get_num_tx_queues)(void); 89 unsigned int (*get_num_rx_queues)(void); 90 91 int slave_maxtype; 92 const struct nla_policy *slave_policy; 93 int (*slave_validate)(struct nlattr *tb[], 94 struct nlattr *data[], 95 struct netlink_ext_ack *extack); 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_unregister(struct rtnl_af_ops *ops); 155 156 void rtnl_af_register(struct rtnl_af_ops *ops); 157 void rtnl_af_unregister(struct rtnl_af_ops *ops); 158 159 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]); 160 struct net_device *rtnl_create_link(struct net *net, const char *ifname, 161 unsigned char name_assign_type, 162 const struct rtnl_link_ops *ops, 163 struct nlattr *tb[]); 164 int rtnl_delete_link(struct net_device *dev); 165 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm); 166 167 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, 168 struct netlink_ext_ack *exterr); 169 170 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind) 171 172 #endif 173