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 <uapi/linux/bpf.h>
7
8 enum netns_bpf_attach_type {
9 NETNS_BPF_INVALID = -1,
10 NETNS_BPF_FLOW_DISSECTOR = 0,
11 NETNS_BPF_SK_LOOKUP,
12 MAX_NETNS_BPF_ATTACH_TYPE
13 };
14
15 static inline enum netns_bpf_attach_type
to_netns_bpf_attach_type(enum bpf_attach_type attach_type)16 to_netns_bpf_attach_type(enum bpf_attach_type attach_type)
17 {
18 switch (attach_type) {
19 case BPF_FLOW_DISSECTOR:
20 return NETNS_BPF_FLOW_DISSECTOR;
21 case BPF_SK_LOOKUP:
22 return NETNS_BPF_SK_LOOKUP;
23 default:
24 return NETNS_BPF_INVALID;
25 }
26 }
27
28 /* Protects updates to netns_bpf */
29 extern struct mutex netns_bpf_mutex;
30
31 union bpf_attr;
32 struct bpf_prog;
33
34 #ifdef CONFIG_NET
35 int netns_bpf_prog_query(const union bpf_attr *attr,
36 union bpf_attr __user *uattr);
37 int netns_bpf_prog_attach(const union bpf_attr *attr,
38 struct bpf_prog *prog);
39 int netns_bpf_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
40 int netns_bpf_link_create(const union bpf_attr *attr,
41 struct bpf_prog *prog);
42 #else
netns_bpf_prog_query(const union bpf_attr * attr,union bpf_attr __user * uattr)43 static inline int netns_bpf_prog_query(const union bpf_attr *attr,
44 union bpf_attr __user *uattr)
45 {
46 return -EOPNOTSUPP;
47 }
48
netns_bpf_prog_attach(const union bpf_attr * attr,struct bpf_prog * prog)49 static inline int netns_bpf_prog_attach(const union bpf_attr *attr,
50 struct bpf_prog *prog)
51 {
52 return -EOPNOTSUPP;
53 }
54
netns_bpf_prog_detach(const union bpf_attr * attr,enum bpf_prog_type ptype)55 static inline int netns_bpf_prog_detach(const union bpf_attr *attr,
56 enum bpf_prog_type ptype)
57 {
58 return -EOPNOTSUPP;
59 }
60
netns_bpf_link_create(const union bpf_attr * attr,struct bpf_prog * prog)61 static inline int netns_bpf_link_create(const union bpf_attr *attr,
62 struct bpf_prog *prog)
63 {
64 return -EOPNOTSUPP;
65 }
66 #endif
67
68 #endif /* _BPF_NETNS_H */
69