| /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of version 2 of the GNU General Public |
| * License as published by the Free Software Foundation. |
| */ |
| #ifndef _LINUX_BPF_H |
| #define _LINUX_BPF_H 1 |
| |
| #include <uapi/linux/bpf.h> |
| #include <linux/workqueue.h> |
| #include <linux/file.h> |
| |
| struct bpf_map; |
| |
| /* map is generic key/value storage optionally accesible by eBPF programs */ |
| struct bpf_map_ops { |
| /* funcs callable from userspace (via syscall) */ |
| struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
| void (*map_free)(struct bpf_map *); |
| int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
| |
| /* funcs callable from userspace and from eBPF programs */ |
| void *(*map_lookup_elem)(struct bpf_map *map, void *key); |
| int (*map_update_elem)(struct bpf_map *map, void *key, void *value); |
| int (*map_delete_elem)(struct bpf_map *map, void *key); |
| }; |
| |
| struct bpf_map { |
| atomic_t refcnt; |
| enum bpf_map_type map_type; |
| u32 key_size; |
| u32 value_size; |
| u32 max_entries; |
| struct bpf_map_ops *ops; |
| struct work_struct work; |
| }; |
| |
| struct bpf_map_type_list { |
| struct list_head list_node; |
| struct bpf_map_ops *ops; |
| enum bpf_map_type type; |
| }; |
| |
| void bpf_register_map_type(struct bpf_map_type_list *tl); |
| void bpf_map_put(struct bpf_map *map); |
| struct bpf_map *bpf_map_get(struct fd f); |
| |
| /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
| * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL |
| * instructions after verifying |
| */ |
| struct bpf_func_proto { |
| u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
| bool gpl_only; |
| }; |
| |
| struct bpf_verifier_ops { |
| /* return eBPF function prototype for verification */ |
| const struct bpf_func_proto *(*get_func_proto)(enum bpf_func_id func_id); |
| }; |
| |
| struct bpf_prog_type_list { |
| struct list_head list_node; |
| struct bpf_verifier_ops *ops; |
| enum bpf_prog_type type; |
| }; |
| |
| void bpf_register_prog_type(struct bpf_prog_type_list *tl); |
| |
| struct bpf_prog; |
| |
| struct bpf_prog_aux { |
| atomic_t refcnt; |
| bool is_gpl_compatible; |
| enum bpf_prog_type prog_type; |
| struct bpf_verifier_ops *ops; |
| struct bpf_map **used_maps; |
| u32 used_map_cnt; |
| struct bpf_prog *prog; |
| struct work_struct work; |
| }; |
| |
| void bpf_prog_put(struct bpf_prog *prog); |
| struct bpf_prog *bpf_prog_get(u32 ufd); |
| |
| #endif /* _LINUX_BPF_H */ |