LXR linux/include/linux/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 <uapi/linux/bpf.h>
   7
   8enum 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
  15static inline enum netns_bpf_attach_type
  16to_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 */
  29extern struct mutex netns_bpf_mutex;
  30
  31union bpf_attr;
  32struct bpf_prog;
  33
  34#ifdef CONFIG_NET
  35int netns_bpf_prog_query(const union bpf_attr *attr,
  36                         union bpf_attr __user *uattr);
  37int netns_bpf_prog_attach(const union bpf_attr *attr,
  38                          struct bpf_prog *prog);
  39int netns_bpf_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
  40int netns_bpf_link_create(const union bpf_attr *attr,
  41                          struct bpf_prog *prog);
  42#else
  43static inline int netns_bpf_prog_query(const union bpf_attr *attr,
  44                                       union bpf_attr __user *uattr)
  45{
  46        return -EOPNOTSUPP;
  47}
  48
  49static inline int netns_bpf_prog_attach(const union bpf_attr *attr,
  50                                        struct bpf_prog *prog)
  51{
  52        return -EOPNOTSUPP;
  53}
  54
  55static inline int netns_bpf_prog_detach(const union bpf_attr *attr,
  56                                        enum bpf_prog_type ptype)
  57{
  58        return -EOPNOTSUPP;
  59}
  60
  61static 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