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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 = BIT(0),
14 RTNL_FLAG_BULK_DEL_SUPPORTED = BIT(1),
15 RTNL_FLAG_DUMP_UNLOCKED = BIT(2),
16};
17
18enum rtnl_kinds {
19 RTNL_KIND_NEW,
20 RTNL_KIND_DEL,
21 RTNL_KIND_GET,
22 RTNL_KIND_SET
23};
24#define RTNL_KIND_MASK 0x3
25
26static inline enum rtnl_kinds rtnl_msgtype_kind(int msgtype)
27{
28 return msgtype & RTNL_KIND_MASK;
29}
30
31void rtnl_register(int protocol, int msgtype,
32 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
33int rtnl_register_module(struct module *owner, int protocol, int msgtype,
34 rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
35int rtnl_unregister(int protocol, int msgtype);
36void rtnl_unregister_all(int protocol);
37
38static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
39{
40 if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
41 return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
42 else
43 return AF_UNSPEC;
44}
45
46/**
47 * struct rtnl_link_ops - rtnetlink link operations
48 *
49 * @list: Used internally
50 * @kind: Identifier
51 * @netns_refund: Physical device, move to init_net on netns exit
52 * @maxtype: Highest device specific netlink attribute number
53 * @policy: Netlink policy for device specific attribute validation
54 * @validate: Optional validation function for netlink/changelink parameters
55 * @alloc: netdev allocation function, can be %NULL and is then used
56 * in place of alloc_netdev_mqs(), in this case @priv_size
57 * and @setup are unused. Returns a netdev or ERR_PTR().
58 * @priv_size: sizeof net_device private space
59 * @setup: net_device setup function
60 * @newlink: Function for configuring and registering a new device
61 * @changelink: Function for changing parameters of an existing device
62 * @dellink: Function to remove a device
63 * @get_size: Function to calculate required room for dumping device
64 * specific netlink attributes
65 * @fill_info: Function to dump device specific netlink attributes
66 * @get_xstats_size: Function to calculate required room for dumping device
67 * specific statistics
68 * @fill_xstats: Function to dump device specific statistics
69 * @get_num_tx_queues: Function to determine number of transmit queues
70 * to create when creating a new device.
71 * @get_num_rx_queues: Function to determine number of receive queues
72 * to create when creating a new device.
73 * @get_link_net: Function to get the i/o netns of the device
74 * @get_linkxstats_size: Function to calculate the required room for
75 * dumping device-specific extended link stats
76 * @fill_linkxstats: Function to dump device-specific extended link stats
77 */
78struct rtnl_link_ops {
79 struct list_head list;
80
81 const char *kind;
82
83 size_t priv_size;
84 struct net_device *(*alloc)(struct nlattr *tb[],
85 const char *ifname,
86 unsigned char name_assign_type,
87 unsigned int num_tx_queues,
88 unsigned int num_rx_queues);
89 void (*setup)(struct net_device *dev);
90
91 bool netns_refund;
92 unsigned int maxtype;
93 const struct nla_policy *policy;
94 int (*validate)(struct nlattr *tb[],
95 struct nlattr *data[],
96 struct netlink_ext_ack *extack);
97
98 int (*newlink)(struct net *src_net,
99 struct net_device *dev,
100 struct nlattr *tb[],
101 struct nlattr *data[],
102 struct netlink_ext_ack *extack);
103 int (*changelink)(struct net_device *dev,
104 struct nlattr *tb[],
105 struct nlattr *data[],
106 struct netlink_ext_ack *extack);
107 void (*dellink)(struct net_device *dev,
108 struct list_head *head);
109
110 size_t (*get_size)(const struct net_device *dev);
111 int (*fill_info)(struct sk_buff *skb,
112 const struct net_device *dev);
113
114 size_t (*get_xstats_size)(const struct net_device *dev);
115 int (*fill_xstats)(struct sk_buff *skb,
116 const struct net_device *dev);
117 unsigned int (*get_num_tx_queues)(void);
118 unsigned int (*get_num_rx_queues)(void);
119
120 unsigned int slave_maxtype;
121 const struct nla_policy *slave_policy;
122 int (*slave_changelink)(struct net_device *dev,
123 struct net_device *slave_dev,
124 struct nlattr *tb[],
125 struct nlattr *data[],
126 struct netlink_ext_ack *extack);
127 size_t (*get_slave_size)(const struct net_device *dev,
128 const struct net_device *slave_dev);
129 int (*fill_slave_info)(struct sk_buff *skb,
130 const struct net_device *dev,
131 const struct net_device *slave_dev);
132 struct net *(*get_link_net)(const struct net_device *dev);
133 size_t (*get_linkxstats_size)(const struct net_device *dev,
134 int attr);
135 int (*fill_linkxstats)(struct sk_buff *skb,
136 const struct net_device *dev,
137 int *prividx, int attr);
138};
139
140int __rtnl_link_register(struct rtnl_link_ops *ops);
141void __rtnl_link_unregister(struct rtnl_link_ops *ops);
142
143int rtnl_link_register(struct rtnl_link_ops *ops);
144void rtnl_link_unregister(struct rtnl_link_ops *ops);
145
146/**
147 * struct rtnl_af_ops - rtnetlink address family operations
148 *
149 * @list: Used internally
150 * @family: Address family
151 * @fill_link_af: Function to fill IFLA_AF_SPEC with address family
152 * specific netlink attributes.
153 * @get_link_af_size: Function to calculate size of address family specific
154 * netlink attributes.
155 * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
156 * for invalid configuration settings.
157 * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
158 * net_device accordingly.
159 */
160struct rtnl_af_ops {
161 struct list_head list;
162 int family;
163
164 int (*fill_link_af)(struct sk_buff *skb,
165 const struct net_device *dev,
166 u32 ext_filter_mask);
167 size_t (*get_link_af_size)(const struct net_device *dev,
168 u32 ext_filter_mask);
169
170 int (*validate_link_af)(const struct net_device *dev,
171 const struct nlattr *attr,
172 struct netlink_ext_ack *extack);
173 int (*set_link_af)(struct net_device *dev,
174 const struct nlattr *attr,
175 struct netlink_ext_ack *extack);
176 int (*fill_stats_af)(struct sk_buff *skb,
177 const struct net_device *dev);
178 size_t (*get_stats_af_size)(const struct net_device *dev);
179};
180
181void rtnl_af_register(struct rtnl_af_ops *ops);
182void rtnl_af_unregister(struct rtnl_af_ops *ops);
183
184struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
185struct net_device *rtnl_create_link(struct net *net, const char *ifname,
186 unsigned char name_assign_type,
187 const struct rtnl_link_ops *ops,
188 struct nlattr *tb[],
189 struct netlink_ext_ack *extack);
190int rtnl_delete_link(struct net_device *dev, u32 portid, const struct nlmsghdr *nlh);
191int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm,
192 u32 portid, const struct nlmsghdr *nlh);
193
194int rtnl_nla_parse_ifinfomsg(struct nlattr **tb, const struct nlattr *nla_peer,
195 struct netlink_ext_ack *exterr);
196struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid);
197
198#define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
199
200#endif
1#ifndef __NET_RTNETLINK_H
2#define __NET_RTNETLINK_H
3
4#include <linux/rtnetlink.h>
5#include <net/netlink.h>
6
7typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *, void *);
8typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
9typedef u16 (*rtnl_calcit_func)(struct sk_buff *, struct nlmsghdr *);
10
11extern int __rtnl_register(int protocol, int msgtype,
12 rtnl_doit_func, rtnl_dumpit_func,
13 rtnl_calcit_func);
14extern void rtnl_register(int protocol, int msgtype,
15 rtnl_doit_func, rtnl_dumpit_func,
16 rtnl_calcit_func);
17extern int rtnl_unregister(int protocol, int msgtype);
18extern void rtnl_unregister_all(int protocol);
19
20static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
21{
22 if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
23 return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
24 else
25 return AF_UNSPEC;
26}
27
28/**
29 * struct rtnl_link_ops - rtnetlink link operations
30 *
31 * @list: Used internally
32 * @kind: Identifier
33 * @maxtype: Highest device specific netlink attribute number
34 * @policy: Netlink policy for device specific attribute validation
35 * @validate: Optional validation function for netlink/changelink parameters
36 * @priv_size: sizeof net_device private space
37 * @setup: net_device setup function
38 * @newlink: Function for configuring and registering a new device
39 * @changelink: Function for changing parameters of an existing device
40 * @dellink: Function to remove a device
41 * @get_size: Function to calculate required room for dumping device
42 * specific netlink attributes
43 * @fill_info: Function to dump device specific netlink attributes
44 * @get_xstats_size: Function to calculate required room for dumping device
45 * specific statistics
46 * @fill_xstats: Function to dump device specific statistics
47 * @get_tx_queues: Function to determine number of transmit queues to create when
48 * creating a new device.
49 */
50struct rtnl_link_ops {
51 struct list_head list;
52
53 const char *kind;
54
55 size_t priv_size;
56 void (*setup)(struct net_device *dev);
57
58 int maxtype;
59 const struct nla_policy *policy;
60 int (*validate)(struct nlattr *tb[],
61 struct nlattr *data[]);
62
63 int (*newlink)(struct net *src_net,
64 struct net_device *dev,
65 struct nlattr *tb[],
66 struct nlattr *data[]);
67 int (*changelink)(struct net_device *dev,
68 struct nlattr *tb[],
69 struct nlattr *data[]);
70 void (*dellink)(struct net_device *dev,
71 struct list_head *head);
72
73 size_t (*get_size)(const struct net_device *dev);
74 int (*fill_info)(struct sk_buff *skb,
75 const struct net_device *dev);
76
77 size_t (*get_xstats_size)(const struct net_device *dev);
78 int (*fill_xstats)(struct sk_buff *skb,
79 const struct net_device *dev);
80 int (*get_tx_queues)(struct net *net,
81 struct nlattr *tb[]);
82};
83
84extern int __rtnl_link_register(struct rtnl_link_ops *ops);
85extern void __rtnl_link_unregister(struct rtnl_link_ops *ops);
86
87extern int rtnl_link_register(struct rtnl_link_ops *ops);
88extern void rtnl_link_unregister(struct rtnl_link_ops *ops);
89
90/**
91 * struct rtnl_af_ops - rtnetlink address family operations
92 *
93 * @list: Used internally
94 * @family: Address family
95 * @fill_link_af: Function to fill IFLA_AF_SPEC with address family
96 * specific netlink attributes.
97 * @get_link_af_size: Function to calculate size of address family specific
98 * netlink attributes.
99 * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
100 * for invalid configuration settings.
101 * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
102 * net_device accordingly.
103 */
104struct rtnl_af_ops {
105 struct list_head list;
106 int family;
107
108 int (*fill_link_af)(struct sk_buff *skb,
109 const struct net_device *dev);
110 size_t (*get_link_af_size)(const struct net_device *dev);
111
112 int (*validate_link_af)(const struct net_device *dev,
113 const struct nlattr *attr);
114 int (*set_link_af)(struct net_device *dev,
115 const struct nlattr *attr);
116};
117
118extern int __rtnl_af_register(struct rtnl_af_ops *ops);
119extern void __rtnl_af_unregister(struct rtnl_af_ops *ops);
120
121extern int rtnl_af_register(struct rtnl_af_ops *ops);
122extern void rtnl_af_unregister(struct rtnl_af_ops *ops);
123
124
125extern struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
126extern struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
127 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]);
128extern int rtnl_configure_link(struct net_device *dev,
129 const struct ifinfomsg *ifm);
130extern const struct nla_policy ifla_policy[IFLA_MAX+1];
131
132#define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
133
134#endif