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 */ 69