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1 | #pragma once |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2016 Daniel Mack | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ||
21 | [Except for the stuff copy/pasted from the kernel sources, see below] | |
22 | ***/ | |
23 | ||
24 | #include <linux/bpf.h> | |
25 | #include <stdint.h> | |
26 | #include <sys/syscall.h> | |
27 | ||
28 | #include "list.h" | |
29 | #include "macro.h" | |
30 | ||
31 | typedef struct BPFProgram BPFProgram; | |
32 | ||
33 | struct BPFProgram { | |
34 | int kernel_fd; | |
35 | uint32_t prog_type; | |
36 | ||
37 | size_t n_instructions; | |
38 | size_t allocated; | |
39 | struct bpf_insn *instructions; | |
40 | }; | |
41 | ||
42 | int bpf_program_new(uint32_t prog_type, BPFProgram **ret); | |
43 | BPFProgram *bpf_program_unref(BPFProgram *p); | |
44 | ||
45 | int bpf_program_add_instructions(BPFProgram *p, const struct bpf_insn *insn, size_t count); | |
46 | int bpf_program_load_kernel(BPFProgram *p, char *log_buf, size_t log_size); | |
47 | ||
48 | int bpf_program_cgroup_attach(BPFProgram *p, int type, const char *path); | |
49 | int bpf_program_cgroup_detach(int type, const char *path); | |
50 | ||
51 | int bpf_map_new(enum bpf_map_type type, size_t key_size, size_t value_size, size_t max_entries, uint32_t flags); | |
52 | int bpf_map_update_element(int fd, const void *key, void *value); | |
53 | int bpf_map_lookup_element(int fd, const void *key, void *value); | |
54 | ||
55 | DEFINE_TRIVIAL_CLEANUP_FUNC(BPFProgram*, bpf_program_unref); |