This source file includes following definitions.
- nfnl_msg_type
- lockdep_nfnl_is_held
1
2 #ifndef _NFNETLINK_H
3 #define _NFNETLINK_H
4
5 #include <linux/netlink.h>
6 #include <linux/capability.h>
7 #include <net/netlink.h>
8 #include <uapi/linux/netfilter/nfnetlink.h>
9
10 struct nfnl_callback {
11 int (*call)(struct net *net, struct sock *nl, struct sk_buff *skb,
12 const struct nlmsghdr *nlh,
13 const struct nlattr * const cda[],
14 struct netlink_ext_ack *extack);
15 int (*call_rcu)(struct net *net, struct sock *nl, struct sk_buff *skb,
16 const struct nlmsghdr *nlh,
17 const struct nlattr * const cda[],
18 struct netlink_ext_ack *extack);
19 int (*call_batch)(struct net *net, struct sock *nl, struct sk_buff *skb,
20 const struct nlmsghdr *nlh,
21 const struct nlattr * const cda[],
22 struct netlink_ext_ack *extack);
23 const struct nla_policy *policy;
24 const u_int16_t attr_count;
25 };
26
27 struct nfnetlink_subsystem {
28 const char *name;
29 __u8 subsys_id;
30 __u8 cb_count;
31 const struct nfnl_callback *cb;
32 struct module *owner;
33 int (*commit)(struct net *net, struct sk_buff *skb);
34 int (*abort)(struct net *net, struct sk_buff *skb, bool autoload);
35 void (*cleanup)(struct net *net);
36 bool (*valid_genid)(struct net *net, u32 genid);
37 };
38
39 int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n);
40 int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);
41
42 int nfnetlink_has_listeners(struct net *net, unsigned int group);
43 int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 portid,
44 unsigned int group, int echo, gfp_t flags);
45 int nfnetlink_set_err(struct net *net, u32 portid, u32 group, int error);
46 int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid,
47 int flags);
48
49 static inline u16 nfnl_msg_type(u8 subsys, u8 msg_type)
50 {
51 return subsys << 8 | msg_type;
52 }
53
54 void nfnl_lock(__u8 subsys_id);
55 void nfnl_unlock(__u8 subsys_id);
56 #ifdef CONFIG_PROVE_LOCKING
57 bool lockdep_nfnl_is_held(__u8 subsys_id);
58 #else
59 static inline bool lockdep_nfnl_is_held(__u8 subsys_id)
60 {
61 return true;
62 }
63 #endif
64
65 #define MODULE_ALIAS_NFNL_SUBSYS(subsys) \
66 MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys))
67
68 #endif