Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0 */
2 : #ifndef __NET_RTNETLINK_H
3 : #define __NET_RTNETLINK_H
4 :
5 : #include <linux/rtnetlink.h>
6 : #include <net/netlink.h>
7 :
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 *);
11 :
12 : enum rtnl_link_flags {
13 : RTNL_FLAG_DOIT_UNLOCKED = 1,
14 : };
15 :
16 : void rtnl_register(int protocol, int msgtype,
17 : rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
18 : int rtnl_register_module(struct module *owner, 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);
22 :
23 0 : static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
24 : {
25 0 : if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
26 0 : return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
27 : else
28 : return AF_UNSPEC;
29 : }
30 :
31 : /**
32 : * struct rtnl_link_ops - rtnetlink link operations
33 : *
34 : * @list: Used internally
35 : * @kind: Identifier
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
48 : * specific statistics
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
58 : */
59 : struct rtnl_link_ops {
60 : struct list_head list;
61 :
62 : const char *kind;
63 :
64 : size_t priv_size;
65 : void (*setup)(struct net_device *dev);
66 :
67 : unsigned int maxtype;
68 : const struct nla_policy *policy;
69 : int (*validate)(struct nlattr *tb[],
70 : struct nlattr *data[],
71 : struct netlink_ext_ack *extack);
72 :
73 : int (*newlink)(struct net *src_net,
74 : struct net_device *dev,
75 : struct nlattr *tb[],
76 : struct nlattr *data[],
77 : struct netlink_ext_ack *extack);
78 : int (*changelink)(struct net_device *dev,
79 : struct nlattr *tb[],
80 : struct nlattr *data[],
81 : struct netlink_ext_ack *extack);
82 : void (*dellink)(struct net_device *dev,
83 : struct list_head *head);
84 :
85 : size_t (*get_size)(const struct net_device *dev);
86 : int (*fill_info)(struct sk_buff *skb,
87 : const struct net_device *dev);
88 :
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);
94 :
95 : unsigned int slave_maxtype;
96 : const struct nla_policy *slave_policy;
97 : int (*slave_changelink)(struct net_device *dev,
98 : struct net_device *slave_dev,
99 : struct nlattr *tb[],
100 : struct nlattr *data[],
101 : struct netlink_ext_ack *extack);
102 : size_t (*get_slave_size)(const struct net_device *dev,
103 : const struct net_device *slave_dev);
104 : int (*fill_slave_info)(struct sk_buff *skb,
105 : const struct net_device *dev,
106 : const struct net_device *slave_dev);
107 : struct net *(*get_link_net)(const struct net_device *dev);
108 : size_t (*get_linkxstats_size)(const struct net_device *dev,
109 : int attr);
110 : int (*fill_linkxstats)(struct sk_buff *skb,
111 : const struct net_device *dev,
112 : int *prividx, int attr);
113 : };
114 :
115 : int __rtnl_link_register(struct rtnl_link_ops *ops);
116 : void __rtnl_link_unregister(struct rtnl_link_ops *ops);
117 :
118 : int rtnl_link_register(struct rtnl_link_ops *ops);
119 : void rtnl_link_unregister(struct rtnl_link_ops *ops);
120 :
121 : /**
122 : * struct rtnl_af_ops - rtnetlink address family operations
123 : *
124 : * @list: Used internally
125 : * @family: Address family
126 : * @fill_link_af: Function to fill IFLA_AF_SPEC with address family
127 : * specific netlink attributes.
128 : * @get_link_af_size: Function to calculate size of address family specific
129 : * netlink attributes.
130 : * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
131 : * for invalid configuration settings.
132 : * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
133 : * net_device accordingly.
134 : */
135 : struct rtnl_af_ops {
136 : struct list_head list;
137 : int family;
138 :
139 : int (*fill_link_af)(struct sk_buff *skb,
140 : const struct net_device *dev,
141 : u32 ext_filter_mask);
142 : size_t (*get_link_af_size)(const struct net_device *dev,
143 : u32 ext_filter_mask);
144 :
145 : int (*validate_link_af)(const struct net_device *dev,
146 : const struct nlattr *attr);
147 : int (*set_link_af)(struct net_device *dev,
148 : const struct nlattr *attr);
149 :
150 : int (*fill_stats_af)(struct sk_buff *skb,
151 : const struct net_device *dev);
152 : size_t (*get_stats_af_size)(const struct net_device *dev);
153 : };
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 : struct netlink_ext_ack *extack);
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 : struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid);
170 :
171 : #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
172 :
173 : #endif
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