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 168