Alexei Starovoitov | 99c55f7 | 2014-09-26 00:16:57 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or |
| 4 | * modify it under the terms of version 2 of the GNU General Public |
| 5 | * License as published by the Free Software Foundation. |
| 6 | */ |
| 7 | #ifndef _LINUX_BPF_H |
| 8 | #define _LINUX_BPF_H 1 |
| 9 | |
| 10 | #include <uapi/linux/bpf.h> |
| 11 | #include <linux/workqueue.h> |
Alexei Starovoitov | db20fd2 | 2014-09-26 00:16:59 -0700 | [diff] [blame] | 12 | #include <linux/file.h> |
Alexei Starovoitov | 99c55f7 | 2014-09-26 00:16:57 -0700 | [diff] [blame] | 13 | |
| 14 | struct bpf_map; |
| 15 | |
| 16 | /* map is generic key/value storage optionally accesible by eBPF programs */ |
| 17 | struct bpf_map_ops { |
| 18 | /* funcs callable from userspace (via syscall) */ |
| 19 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
| 20 | void (*map_free)(struct bpf_map *); |
Alexei Starovoitov | db20fd2 | 2014-09-26 00:16:59 -0700 | [diff] [blame] | 21 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
| 22 | |
| 23 | /* funcs callable from userspace and from eBPF programs */ |
| 24 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); |
| 25 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value); |
| 26 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
Alexei Starovoitov | 99c55f7 | 2014-09-26 00:16:57 -0700 | [diff] [blame] | 27 | }; |
| 28 | |
| 29 | struct bpf_map { |
| 30 | atomic_t refcnt; |
| 31 | enum bpf_map_type map_type; |
| 32 | u32 key_size; |
| 33 | u32 value_size; |
| 34 | u32 max_entries; |
| 35 | struct bpf_map_ops *ops; |
| 36 | struct work_struct work; |
| 37 | }; |
| 38 | |
| 39 | struct bpf_map_type_list { |
| 40 | struct list_head list_node; |
| 41 | struct bpf_map_ops *ops; |
| 42 | enum bpf_map_type type; |
| 43 | }; |
| 44 | |
| 45 | void bpf_register_map_type(struct bpf_map_type_list *tl); |
| 46 | void bpf_map_put(struct bpf_map *map); |
Alexei Starovoitov | db20fd2 | 2014-09-26 00:16:59 -0700 | [diff] [blame] | 47 | struct bpf_map *bpf_map_get(struct fd f); |
Alexei Starovoitov | 99c55f7 | 2014-09-26 00:16:57 -0700 | [diff] [blame] | 48 | |
Alexei Starovoitov | 09756af | 2014-09-26 00:17:00 -0700 | [diff] [blame^] | 49 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
| 50 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL |
| 51 | * instructions after verifying |
| 52 | */ |
| 53 | struct bpf_func_proto { |
| 54 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
| 55 | bool gpl_only; |
| 56 | }; |
| 57 | |
| 58 | struct bpf_verifier_ops { |
| 59 | /* return eBPF function prototype for verification */ |
| 60 | const struct bpf_func_proto *(*get_func_proto)(enum bpf_func_id func_id); |
| 61 | }; |
| 62 | |
| 63 | struct bpf_prog_type_list { |
| 64 | struct list_head list_node; |
| 65 | struct bpf_verifier_ops *ops; |
| 66 | enum bpf_prog_type type; |
| 67 | }; |
| 68 | |
| 69 | void bpf_register_prog_type(struct bpf_prog_type_list *tl); |
| 70 | |
| 71 | struct bpf_prog; |
| 72 | |
| 73 | struct bpf_prog_aux { |
| 74 | atomic_t refcnt; |
| 75 | bool is_gpl_compatible; |
| 76 | enum bpf_prog_type prog_type; |
| 77 | struct bpf_verifier_ops *ops; |
| 78 | struct bpf_map **used_maps; |
| 79 | u32 used_map_cnt; |
| 80 | struct bpf_prog *prog; |
| 81 | struct work_struct work; |
| 82 | }; |
| 83 | |
| 84 | void bpf_prog_put(struct bpf_prog *prog); |
| 85 | struct bpf_prog *bpf_prog_get(u32 ufd); |
| 86 | |
Alexei Starovoitov | 99c55f7 | 2014-09-26 00:16:57 -0700 | [diff] [blame] | 87 | #endif /* _LINUX_BPF_H */ |