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net: add netlink_ext_ack argument to rtnl_link_ops.slave_changelink
[karo-tx-linux.git] / include / net / rtnetlink.h
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                               struct netlink_ext_ack *);
9 typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
10 typedef u16 (*rtnl_calcit_func)(struct sk_buff *, struct nlmsghdr *);
11
12 int __rtnl_register(int protocol, int msgtype,
13                     rtnl_doit_func, rtnl_dumpit_func, rtnl_calcit_func);
14 void rtnl_register(int protocol, int msgtype,
15                    rtnl_doit_func, rtnl_dumpit_func, rtnl_calcit_func);
16 int rtnl_unregister(int protocol, int msgtype);
17 void rtnl_unregister_all(int protocol);
18
19 static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
20 {
21         if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
22                 return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
23         else
24                 return AF_UNSPEC;
25 }
26
27 /**
28  *      struct rtnl_link_ops - rtnetlink link operations
29  *
30  *      @list: Used internally
31  *      @kind: Identifier
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  *      @get_linkxstats_size: Function to calculate the required room for
52  *                            dumping device-specific extended link stats
53  *      @fill_linkxstats: Function to dump device-specific extended link stats
54  */
55 struct rtnl_link_ops {
56         struct list_head        list;
57
58         const char              *kind;
59
60         size_t                  priv_size;
61         void                    (*setup)(struct net_device *dev);
62
63         int                     maxtype;
64         const struct nla_policy *policy;
65         int                     (*validate)(struct nlattr *tb[],
66                                             struct nlattr *data[],
67                                             struct netlink_ext_ack *extack);
68
69         int                     (*newlink)(struct net *src_net,
70                                            struct net_device *dev,
71                                            struct nlattr *tb[],
72                                            struct nlattr *data[],
73                                            struct netlink_ext_ack *extack);
74         int                     (*changelink)(struct net_device *dev,
75                                               struct nlattr *tb[],
76                                               struct nlattr *data[],
77                                               struct netlink_ext_ack *extack);
78         void                    (*dellink)(struct net_device *dev,
79                                            struct list_head *head);
80
81         size_t                  (*get_size)(const struct net_device *dev);
82         int                     (*fill_info)(struct sk_buff *skb,
83                                              const struct net_device *dev);
84
85         size_t                  (*get_xstats_size)(const struct net_device *dev);
86         int                     (*fill_xstats)(struct sk_buff *skb,
87                                                const struct net_device *dev);
88         unsigned int            (*get_num_tx_queues)(void);
89         unsigned int            (*get_num_rx_queues)(void);
90
91         int                     slave_maxtype;
92         const struct nla_policy *slave_policy;
93         int                     (*slave_validate)(struct nlattr *tb[],
94                                                   struct nlattr *data[]);
95         int                     (*slave_changelink)(struct net_device *dev,
96                                                     struct net_device *slave_dev,
97                                                     struct nlattr *tb[],
98                                                     struct nlattr *data[],
99                                                     struct netlink_ext_ack *extack);
100         size_t                  (*get_slave_size)(const struct net_device *dev,
101                                                   const struct net_device *slave_dev);
102         int                     (*fill_slave_info)(struct sk_buff *skb,
103                                                    const struct net_device *dev,
104                                                    const struct net_device *slave_dev);
105         struct net              *(*get_link_net)(const struct net_device *dev);
106         size_t                  (*get_linkxstats_size)(const struct net_device *dev,
107                                                        int attr);
108         int                     (*fill_linkxstats)(struct sk_buff *skb,
109                                                    const struct net_device *dev,
110                                                    int *prividx, int attr);
111 };
112
113 int __rtnl_link_register(struct rtnl_link_ops *ops);
114 void __rtnl_link_unregister(struct rtnl_link_ops *ops);
115
116 int rtnl_link_register(struct rtnl_link_ops *ops);
117 void rtnl_link_unregister(struct rtnl_link_ops *ops);
118
119 /**
120  *      struct rtnl_af_ops - rtnetlink address family operations
121  *
122  *      @list: Used internally
123  *      @family: Address family
124  *      @fill_link_af: Function to fill IFLA_AF_SPEC with address family
125  *                     specific netlink attributes.
126  *      @get_link_af_size: Function to calculate size of address family specific
127  *                         netlink attributes.
128  *      @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
129  *                         for invalid configuration settings.
130  *      @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
131  *                    net_device accordingly.
132  */
133 struct rtnl_af_ops {
134         struct list_head        list;
135         int                     family;
136
137         int                     (*fill_link_af)(struct sk_buff *skb,
138                                                 const struct net_device *dev,
139                                                 u32 ext_filter_mask);
140         size_t                  (*get_link_af_size)(const struct net_device *dev,
141                                                     u32 ext_filter_mask);
142
143         int                     (*validate_link_af)(const struct net_device *dev,
144                                                     const struct nlattr *attr);
145         int                     (*set_link_af)(struct net_device *dev,
146                                                const struct nlattr *attr);
147
148         int                     (*fill_stats_af)(struct sk_buff *skb,
149                                                  const struct net_device *dev);
150         size_t                  (*get_stats_af_size)(const struct net_device *dev);
151 };
152
153 void __rtnl_af_unregister(struct rtnl_af_ops *ops);
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 int rtnl_delete_link(struct net_device *dev);
164 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm);
165
166 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
167                         struct netlink_ext_ack *exterr);
168
169 #define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
170
171 #endif