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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
8typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *,
9 struct netlink_ext_ack *);
10typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
11
12enum rtnl_link_flags {
13 RTNL_FLAG_DOIT_UNLOCKED = 1,
14};
15
16void rtnl_register(int protocol, int msgtype,
17 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
18int rtnl_register_module(struct module *owner, int protocol, int msgtype,
19 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
20int rtnl_unregister(int protocol, int msgtype);
21void rtnl_unregister_all(int protocol);
22
23static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
24{
25 if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
26 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 */
59struct 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
115int __rtnl_link_register(struct rtnl_link_ops *ops);
116void __rtnl_link_unregister(struct rtnl_link_ops *ops);
117
118int rtnl_link_register(struct rtnl_link_ops *ops);
119void 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 */
135struct 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
155void rtnl_af_register(struct rtnl_af_ops *ops);
156void rtnl_af_unregister(struct rtnl_af_ops *ops);
157
158struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
159struct 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);
164int rtnl_delete_link(struct net_device *dev);
165int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
166
167int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
168 struct netlink_ext_ack *exterr);
169struct 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
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
8typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *,
9 struct netlink_ext_ack *);
10typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
11
12enum rtnl_link_flags {
13 RTNL_FLAG_DOIT_UNLOCKED = 1,
14};
15
16void rtnl_register(int protocol, int msgtype,
17 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
18int rtnl_register_module(struct module *owner, int protocol, int msgtype,
19 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
20int rtnl_unregister(int protocol, int msgtype);
21void rtnl_unregister_all(int protocol);
22
23static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
24{
25 if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
26 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 * @netns_refund: Physical device, move to init_net on netns exit
37 * @maxtype: Highest device specific netlink attribute number
38 * @policy: Netlink policy for device specific attribute validation
39 * @validate: Optional validation function for netlink/changelink parameters
40 * @alloc: netdev allocation function, can be %NULL and is then used
41 * in place of alloc_netdev_mqs(), in this case @priv_size
42 * and @setup are unused. Returns a netdev or ERR_PTR().
43 * @priv_size: sizeof net_device private space
44 * @setup: net_device setup function
45 * @newlink: Function for configuring and registering a new device
46 * @changelink: Function for changing parameters of an existing device
47 * @dellink: Function to remove a device
48 * @get_size: Function to calculate required room for dumping device
49 * specific netlink attributes
50 * @fill_info: Function to dump device specific netlink attributes
51 * @get_xstats_size: Function to calculate required room for dumping device
52 * specific statistics
53 * @fill_xstats: Function to dump device specific statistics
54 * @get_num_tx_queues: Function to determine number of transmit queues
55 * to create when creating a new device.
56 * @get_num_rx_queues: Function to determine number of receive queues
57 * to create when creating a new device.
58 * @get_link_net: Function to get the i/o netns of the device
59 * @get_linkxstats_size: Function to calculate the required room for
60 * dumping device-specific extended link stats
61 * @fill_linkxstats: Function to dump device-specific extended link stats
62 */
63struct rtnl_link_ops {
64 struct list_head list;
65
66 const char *kind;
67
68 size_t priv_size;
69 struct net_device *(*alloc)(struct nlattr *tb[],
70 const char *ifname,
71 unsigned char name_assign_type,
72 unsigned int num_tx_queues,
73 unsigned int num_rx_queues);
74 void (*setup)(struct net_device *dev);
75
76 bool netns_refund;
77 unsigned int maxtype;
78 const struct nla_policy *policy;
79 int (*validate)(struct nlattr *tb[],
80 struct nlattr *data[],
81 struct netlink_ext_ack *extack);
82
83 int (*newlink)(struct net *src_net,
84 struct net_device *dev,
85 struct nlattr *tb[],
86 struct nlattr *data[],
87 struct netlink_ext_ack *extack);
88 int (*changelink)(struct net_device *dev,
89 struct nlattr *tb[],
90 struct nlattr *data[],
91 struct netlink_ext_ack *extack);
92 void (*dellink)(struct net_device *dev,
93 struct list_head *head);
94
95 size_t (*get_size)(const struct net_device *dev);
96 int (*fill_info)(struct sk_buff *skb,
97 const struct net_device *dev);
98
99 size_t (*get_xstats_size)(const struct net_device *dev);
100 int (*fill_xstats)(struct sk_buff *skb,
101 const struct net_device *dev);
102 unsigned int (*get_num_tx_queues)(void);
103 unsigned int (*get_num_rx_queues)(void);
104
105 unsigned int slave_maxtype;
106 const struct nla_policy *slave_policy;
107 int (*slave_changelink)(struct net_device *dev,
108 struct net_device *slave_dev,
109 struct nlattr *tb[],
110 struct nlattr *data[],
111 struct netlink_ext_ack *extack);
112 size_t (*get_slave_size)(const struct net_device *dev,
113 const struct net_device *slave_dev);
114 int (*fill_slave_info)(struct sk_buff *skb,
115 const struct net_device *dev,
116 const struct net_device *slave_dev);
117 struct net *(*get_link_net)(const struct net_device *dev);
118 size_t (*get_linkxstats_size)(const struct net_device *dev,
119 int attr);
120 int (*fill_linkxstats)(struct sk_buff *skb,
121 const struct net_device *dev,
122 int *prividx, int attr);
123};
124
125int __rtnl_link_register(struct rtnl_link_ops *ops);
126void __rtnl_link_unregister(struct rtnl_link_ops *ops);
127
128int rtnl_link_register(struct rtnl_link_ops *ops);
129void rtnl_link_unregister(struct rtnl_link_ops *ops);
130
131/**
132 * struct rtnl_af_ops - rtnetlink address family operations
133 *
134 * @list: Used internally
135 * @family: Address family
136 * @fill_link_af: Function to fill IFLA_AF_SPEC with address family
137 * specific netlink attributes.
138 * @get_link_af_size: Function to calculate size of address family specific
139 * netlink attributes.
140 * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
141 * for invalid configuration settings.
142 * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
143 * net_device accordingly.
144 */
145struct rtnl_af_ops {
146 struct list_head list;
147 int family;
148
149 int (*fill_link_af)(struct sk_buff *skb,
150 const struct net_device *dev,
151 u32 ext_filter_mask);
152 size_t (*get_link_af_size)(const struct net_device *dev,
153 u32 ext_filter_mask);
154
155 int (*validate_link_af)(const struct net_device *dev,
156 const struct nlattr *attr);
157 int (*set_link_af)(struct net_device *dev,
158 const struct nlattr *attr,
159 struct netlink_ext_ack *extack);
160 int (*fill_stats_af)(struct sk_buff *skb,
161 const struct net_device *dev);
162 size_t (*get_stats_af_size)(const struct net_device *dev);
163};
164
165void rtnl_af_register(struct rtnl_af_ops *ops);
166void rtnl_af_unregister(struct rtnl_af_ops *ops);
167
168struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
169struct net_device *rtnl_create_link(struct net *net, const char *ifname,
170 unsigned char name_assign_type,
171 const struct rtnl_link_ops *ops,
172 struct nlattr *tb[],
173 struct netlink_ext_ack *extack);
174int rtnl_delete_link(struct net_device *dev);
175int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
176
177int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
178 struct netlink_ext_ack *exterr);
179struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid);
180
181#define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
182
183#endif