Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
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
10struct 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; /* netlink attribute policy */
24 const u_int16_t attr_count; /* number of nlattr's */
25};
26
27enum nfnl_abort_action {
28 NFNL_ABORT_NONE = 0,
29 NFNL_ABORT_AUTOLOAD,
30 NFNL_ABORT_VALIDATE,
31};
32
33struct nfnetlink_subsystem {
34 const char *name;
35 __u8 subsys_id; /* nfnetlink subsystem ID */
36 __u8 cb_count; /* number of callbacks */
37 const struct nfnl_callback *cb; /* callback for individual types */
38 struct module *owner;
39 int (*commit)(struct net *net, struct sk_buff *skb);
40 int (*abort)(struct net *net, struct sk_buff *skb,
41 enum nfnl_abort_action action);
42 void (*cleanup)(struct net *net);
43 bool (*valid_genid)(struct net *net, u32 genid);
44};
45
46int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n);
47int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);
48
49int nfnetlink_has_listeners(struct net *net, unsigned int group);
50int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 portid,
51 unsigned int group, int echo, gfp_t flags);
52int nfnetlink_set_err(struct net *net, u32 portid, u32 group, int error);
53int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid);
54
55static inline u16 nfnl_msg_type(u8 subsys, u8 msg_type)
56{
57 return subsys << 8 | msg_type;
58}
59
60void nfnl_lock(__u8 subsys_id);
61void nfnl_unlock(__u8 subsys_id);
62#ifdef CONFIG_PROVE_LOCKING
63bool lockdep_nfnl_is_held(__u8 subsys_id);
64#else
65static inline bool lockdep_nfnl_is_held(__u8 subsys_id)
66{
67 return true;
68}
69#endif /* CONFIG_PROVE_LOCKING */
70
71#define MODULE_ALIAS_NFNL_SUBSYS(subsys) \
72 MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys))
73
74#endif /* _NFNETLINK_H */