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 int __rtnl_register(int protocol, int msgtype, 12 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags); 13 void rtnl_register(int protocol, int msgtype, 14 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags); 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 * @get_linkxstats_size: Function to calculate the required room for 51 * dumping device-specific extended link stats 52 * @fill_linkxstats: Function to dump device-specific extended link stats 53 */ 54 struct rtnl_link_ops { 55 struct list_head list; 56 57 const char *kind; 58 59 size_t priv_size; 60 void (*setup)(struct net_device *dev); 61 62 int maxtype; 63 const struct nla_policy *policy; 64 int (*validate)(struct nlattr *tb[], 65 struct nlattr *data[], 66 struct netlink_ext_ack *extack); 67 68 int (*newlink)(struct net *src_net, 69 struct net_device *dev, 70 struct nlattr *tb[], 71 struct nlattr *data[], 72 struct netlink_ext_ack *extack); 73 int (*changelink)(struct net_device *dev, 74 struct nlattr *tb[], 75 struct nlattr *data[], 76 struct netlink_ext_ack *extack); 77 void (*dellink)(struct net_device *dev, 78 struct list_head *head); 79 80 size_t (*get_size)(const struct net_device *dev); 81 int (*fill_info)(struct sk_buff *skb, 82 const struct net_device *dev); 83 84 size_t (*get_xstats_size)(const struct net_device *dev); 85 int (*fill_xstats)(struct sk_buff *skb, 86 const struct net_device *dev); 87 unsigned int (*get_num_tx_queues)(void); 88 unsigned int (*get_num_rx_queues)(void); 89 90 int slave_maxtype; 91 const struct nla_policy *slave_policy; 92 int (*slave_validate)(struct nlattr *tb[], 93 struct nlattr *data[], 94 struct netlink_ext_ack *extack); 95 int (*slave_changelink)(struct net_device *dev, 96 struct net_device *slave_dev, 97 struct nlattr *tb[], 98 struct nlattr *data[], 99 struct netlink_ext_ack *extack); 100 size_t (*get_slave_size)(const struct net_device *dev, 101 const struct net_device *slave_dev); 102 int (*fill_slave_info)(struct sk_buff *skb, 103 const struct net_device *dev, 104 const struct net_device *slave_dev); 105 struct net *(*get_link_net)(const struct net_device *dev); 106 size_t (*get_linkxstats_size)(const struct net_device *dev, 107 int attr); 108 int (*fill_linkxstats)(struct sk_buff *skb, 109 const struct net_device *dev, 110 int *prividx, int attr); 111 }; 112 113 int __rtnl_link_register(struct rtnl_link_ops *ops); 114 void __rtnl_link_unregister(struct rtnl_link_ops *ops); 115 116 int rtnl_link_register(struct rtnl_link_ops *ops); 117 void rtnl_link_unregister(struct rtnl_link_ops *ops); 118 119 /** 120 * struct rtnl_af_ops - rtnetlink address family operations 121 * 122 * @list: Used internally 123 * @family: Address family 124 * @fill_link_af: Function to fill IFLA_AF_SPEC with address family 125 * specific netlink attributes. 126 * @get_link_af_size: Function to calculate size of address family specific 127 * netlink attributes. 128 * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr 129 * for invalid configuration settings. 130 * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify 131 * net_device accordingly. 132 */ 133 struct rtnl_af_ops { 134 struct list_head list; 135 int family; 136 137 int (*fill_link_af)(struct sk_buff *skb, 138 const struct net_device *dev, 139 u32 ext_filter_mask); 140 size_t (*get_link_af_size)(const struct net_device *dev, 141 u32 ext_filter_mask); 142 143 int (*validate_link_af)(const struct net_device *dev, 144 const struct nlattr *attr); 145 int (*set_link_af)(struct net_device *dev, 146 const struct nlattr *attr); 147 148 int (*fill_stats_af)(struct sk_buff *skb, 149 const struct net_device *dev); 150 size_t (*get_stats_af_size)(const struct net_device *dev); 151 }; 152 153 void __rtnl_af_unregister(struct rtnl_af_ops *ops); 154 155 void rtnl_af_register(struct rtnl_af_ops *ops); 156 void rtnl_af_unregister(struct rtnl_af_ops *ops); 157 158 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]); 159 struct net_device *rtnl_create_link(struct net *net, const char *ifname, 160 unsigned char name_assign_type, 161 const struct rtnl_link_ops *ops, 162 struct nlattr *tb[]); 163 int rtnl_delete_link(struct net_device *dev); 164 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm); 165 166 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, 167 struct netlink_ext_ack *exterr); 168 169 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind) 170 171 #endif 172