bpf-netns.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _BPF_NETNS_H
 3#define _BPF_NETNS_H
 4
 5#include <linux/mutex.h>
 6#include <net/netns/bpf.h>
 7#include <uapi/linux/bpf.h>
 8
 9static inline enum netns_bpf_attach_type
10to_netns_bpf_attach_type(enum bpf_attach_type attach_type)
11{
12	switch (attach_type) {
13	case BPF_FLOW_DISSECTOR:
14		return NETNS_BPF_FLOW_DISSECTOR;
15	case BPF_SK_LOOKUP:
16		return NETNS_BPF_SK_LOOKUP;
17	default:
18		return NETNS_BPF_INVALID;
19	}
20}
21
22/* Protects updates to netns_bpf */
23extern struct mutex netns_bpf_mutex;
24
25union bpf_attr;
26struct bpf_prog;
27
28#ifdef CONFIG_NET
29int netns_bpf_prog_query(const union bpf_attr *attr,
30			 union bpf_attr __user *uattr);
31int netns_bpf_prog_attach(const union bpf_attr *attr,
32			  struct bpf_prog *prog);
33int netns_bpf_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
34int netns_bpf_link_create(const union bpf_attr *attr,
35			  struct bpf_prog *prog);
36#else
37static inline int netns_bpf_prog_query(const union bpf_attr *attr,
38				       union bpf_attr __user *uattr)
39{
40	return -EOPNOTSUPP;
41}
42
43static inline int netns_bpf_prog_attach(const union bpf_attr *attr,
44					struct bpf_prog *prog)
45{
46	return -EOPNOTSUPP;
47}
48
49static inline int netns_bpf_prog_detach(const union bpf_attr *attr,
50					enum bpf_prog_type ptype)
51{
52	return -EOPNOTSUPP;
53}
54
55static inline int netns_bpf_link_create(const union bpf_attr *attr,
56					struct bpf_prog *prog)
57{
58	return -EOPNOTSUPP;
59}
60#endif
61
62#endif /* _BPF_NETNS_H */