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 <net/netns/bpf.h>
   7 #include <uapi/linux/bpf.h>
   8
   9 static inline enum netns_bpf_attach_type
  10 to_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 */
  23 extern struct mutex netns_bpf_mutex;
  24
  25 union bpf_attr;
  26 struct bpf_prog;
  27
  28 #ifdef CONFIG_NET
  29 int netns_bpf_prog_query(const union bpf_attr *attr,
  30                          union bpf_attr __user *uattr);
  31 int netns_bpf_prog_attach(const union bpf_attr *attr,
  32                           struct bpf_prog *prog);
  33 int netns_bpf_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
  34 int netns_bpf_link_create(const union bpf_attr *attr,
  35                           struct bpf_prog *prog);
  36 #else
  37 static inline int netns_bpf_prog_query(const union bpf_attr *attr,
  38                                        union bpf_attr __user *uattr)
  39 {
  40         return -EOPNOTSUPP;
  41 }
  42
  43 static inline int netns_bpf_prog_attach(const union bpf_attr *attr,
  44                                         struct bpf_prog *prog)
  45 {
  46         return -EOPNOTSUPP;
  47 }
  48
  49 static inline int netns_bpf_prog_detach(const union bpf_attr *attr,
  50                                         enum bpf_prog_type ptype)
  51 {
  52         return -EOPNOTSUPP;
  53 }
  54
  55 static 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 */