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
   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
  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
  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
  49 static inline int netns_bpf_prog_attach(const union bpf_attr *attr,
  50                                         struct bpf_prog *prog)
  51 {
  52         return -EOPNOTSUPP;
  53 }
  54
  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
  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 */