1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __NET_RTNETLINK_H
3 #define __NET_RTNETLINK_H
5 #include <linux/rtnetlink.h>
6 #include <net/netlink.h>
8 typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *,
9 struct netlink_ext_ack *);
10 typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
12 enum rtnl_link_flags {
13 RTNL_FLAG_DOIT_UNLOCKED = 1,
16 int __rtnl_register(int protocol, int msgtype,
17 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
18 void rtnl_register(int protocol, int msgtype,
19 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
20 int rtnl_unregister(int protocol, int msgtype);
21 void rtnl_unregister_all(int protocol);
23 static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
25 if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
26 return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
32 * struct rtnl_link_ops - rtnetlink link operations
34 * @list: Used internally
36 * @maxtype: Highest device specific netlink attribute number
37 * @policy: Netlink policy for device specific attribute validation
38 * @validate: Optional validation function for netlink/changelink parameters
39 * @priv_size: sizeof net_device private space
40 * @setup: net_device setup function
41 * @newlink: Function for configuring and registering a new device
42 * @changelink: Function for changing parameters of an existing device
43 * @dellink: Function to remove a device
44 * @get_size: Function to calculate required room for dumping device
45 * specific netlink attributes
46 * @fill_info: Function to dump device specific netlink attributes
47 * @get_xstats_size: Function to calculate required room for dumping device
49 * @fill_xstats: Function to dump device specific statistics
50 * @get_num_tx_queues: Function to determine number of transmit queues
51 * to create when creating a new device.
52 * @get_num_rx_queues: Function to determine number of receive queues
53 * to create when creating a new device.
54 * @get_link_net: Function to get the i/o netns of the device
55 * @get_linkxstats_size: Function to calculate the required room for
56 * dumping device-specific extended link stats
57 * @fill_linkxstats: Function to dump device-specific extended link stats
59 struct rtnl_link_ops {
60 struct list_head list;
65 void (*setup)(struct net_device *dev);
68 const struct nla_policy *policy;
69 int (*validate)(struct nlattr *tb[],
70 struct nlattr *data[],
71 struct netlink_ext_ack *extack);
73 int (*newlink)(struct net *src_net,
74 struct net_device *dev,
76 struct nlattr *data[],
77 struct netlink_ext_ack *extack);
78 int (*changelink)(struct net_device *dev,
80 struct nlattr *data[],
81 struct netlink_ext_ack *extack);
82 void (*dellink)(struct net_device *dev,
83 struct list_head *head);
85 size_t (*get_size)(const struct net_device *dev);
86 int (*fill_info)(struct sk_buff *skb,
87 const struct net_device *dev);
89 size_t (*get_xstats_size)(const struct net_device *dev);
90 int (*fill_xstats)(struct sk_buff *skb,
91 const struct net_device *dev);
92 unsigned int (*get_num_tx_queues)(void);
93 unsigned int (*get_num_rx_queues)(void);
96 const struct nla_policy *slave_policy;
97 int (*slave_validate)(struct nlattr *tb[],
98 struct nlattr *data[],
99 struct netlink_ext_ack *extack);
100 int (*slave_changelink)(struct net_device *dev,
101 struct net_device *slave_dev,
103 struct nlattr *data[],
104 struct netlink_ext_ack *extack);
105 size_t (*get_slave_size)(const struct net_device *dev,
106 const struct net_device *slave_dev);
107 int (*fill_slave_info)(struct sk_buff *skb,
108 const struct net_device *dev,
109 const struct net_device *slave_dev);
110 struct net *(*get_link_net)(const struct net_device *dev);
111 size_t (*get_linkxstats_size)(const struct net_device *dev,
113 int (*fill_linkxstats)(struct sk_buff *skb,
114 const struct net_device *dev,
115 int *prividx, int attr);
118 int __rtnl_link_register(struct rtnl_link_ops *ops);
119 void __rtnl_link_unregister(struct rtnl_link_ops *ops);
121 int rtnl_link_register(struct rtnl_link_ops *ops);
122 void rtnl_link_unregister(struct rtnl_link_ops *ops);
125 * struct rtnl_af_ops - rtnetlink address family operations
127 * @list: Used internally
128 * @family: Address family
129 * @fill_link_af: Function to fill IFLA_AF_SPEC with address family
130 * specific netlink attributes.
131 * @get_link_af_size: Function to calculate size of address family specific
132 * netlink attributes.
133 * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
134 * for invalid configuration settings.
135 * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
136 * net_device accordingly.
139 struct list_head list;
142 int (*fill_link_af)(struct sk_buff *skb,
143 const struct net_device *dev,
144 u32 ext_filter_mask);
145 size_t (*get_link_af_size)(const struct net_device *dev,
146 u32 ext_filter_mask);
148 int (*validate_link_af)(const struct net_device *dev,
149 const struct nlattr *attr);
150 int (*set_link_af)(struct net_device *dev,
151 const struct nlattr *attr);
153 int (*fill_stats_af)(struct sk_buff *skb,
154 const struct net_device *dev);
155 size_t (*get_stats_af_size)(const struct net_device *dev);
158 void __rtnl_af_unregister(struct rtnl_af_ops *ops);
160 void rtnl_af_register(struct rtnl_af_ops *ops);
161 void rtnl_af_unregister(struct rtnl_af_ops *ops);
163 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
164 struct net_device *rtnl_create_link(struct net *net, const char *ifname,
165 unsigned char name_assign_type,
166 const struct rtnl_link_ops *ops,
167 struct nlattr *tb[]);
168 int rtnl_delete_link(struct net_device *dev);
169 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
171 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
172 struct netlink_ext_ack *exterr);
174 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)