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 typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
9 typedef u16 (*rtnl_calcit_func)(struct sk_buff *, struct nlmsghdr *);
10
11 int __rtnl_register(int protocol, int msgtype,
12 rtnl_doit_func, rtnl_dumpit_func, rtnl_calcit_func);
13 void rtnl_register(int protocol, int msgtype,
14 rtnl_doit_func, rtnl_dumpit_func, rtnl_calcit_func);
15 int rtnl_unregister(int protocol, int msgtype);
16 void rtnl_unregister_all(int protocol);
17
rtnl_msg_family(const struct nlmsghdr * nlh)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 * @netns_refund: Physical device, move to init_net on netns exit
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 */
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 bool netns_refund;
86 int slave_maxtype;
87 const struct nla_policy *slave_policy;
88 int (*slave_validate)(struct nlattr *tb[],
89 struct nlattr *data[]);
90 int (*slave_changelink)(struct net_device *dev,
91 struct net_device *slave_dev,
92 struct nlattr *tb[],
93 struct nlattr *data[]);
94 size_t (*get_slave_size)(const struct net_device *dev,
95 const struct net_device *slave_dev);
96 int (*fill_slave_info)(struct sk_buff *skb,
97 const struct net_device *dev,
98 const struct net_device *slave_dev);
99 struct net *(*get_link_net)(const struct net_device *dev);
100 };
101
102 int __rtnl_link_register(struct rtnl_link_ops *ops);
103 void __rtnl_link_unregister(struct rtnl_link_ops *ops);
104
105 int rtnl_link_register(struct rtnl_link_ops *ops);
106 void rtnl_link_unregister(struct rtnl_link_ops *ops);
107
108 /**
109 * struct rtnl_af_ops - rtnetlink address family operations
110 *
111 * @list: Used internally
112 * @family: Address family
113 * @fill_link_af: Function to fill IFLA_AF_SPEC with address family
114 * specific netlink attributes.
115 * @get_link_af_size: Function to calculate size of address family specific
116 * netlink attributes.
117 * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
118 * for invalid configuration settings.
119 * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
120 * net_device accordingly.
121 */
122 struct rtnl_af_ops {
123 struct list_head list;
124 int family;
125
126 int (*fill_link_af)(struct sk_buff *skb,
127 const struct net_device *dev,
128 u32 ext_filter_mask);
129 size_t (*get_link_af_size)(const struct net_device *dev,
130 u32 ext_filter_mask);
131
132 int (*validate_link_af)(const struct net_device *dev,
133 const struct nlattr *attr);
134 int (*set_link_af)(struct net_device *dev,
135 const struct nlattr *attr);
136 };
137
138 void __rtnl_af_unregister(struct rtnl_af_ops *ops);
139
140 void rtnl_af_register(struct rtnl_af_ops *ops);
141 void rtnl_af_unregister(struct rtnl_af_ops *ops);
142
143 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
144 struct net_device *rtnl_create_link(struct net *net, const char *ifname,
145 unsigned char name_assign_type,
146 const struct rtnl_link_ops *ops,
147 struct nlattr *tb[]);
148 int rtnl_delete_link(struct net_device *dev);
149 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
150
151 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len);
152
153 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
154
155 #endif
156