src/shared/bpf-program.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #include <linux/bpf.h>
   5 #include <stdint.h>
   6 #include <sys/syscall.h>
   7
   8 #include "list.h"
   9 #include "macro.h"
  10
  11 typedef struct BPFProgram BPFProgram;
  12
  13 struct BPFProgram {
  14         unsigned n_ref;
  15
  16         int kernel_fd;
  17         uint32_t prog_type;
  18
  19         size_t n_instructions;
  20         struct bpf_insn *instructions;
  21
  22         char *attached_path;
  23         int attached_type;
  24         uint32_t attached_flags;
  25 };
  26
  27 int bpf_program_new(uint32_t prog_type, BPFProgram **ret);
  28 int bpf_program_new_from_bpffs_path(const char *path, BPFProgram **ret);
  29 BPFProgram *bpf_program_ref(BPFProgram *p);
  30 BPFProgram *bpf_program_unref(BPFProgram *p);
  31
  32 int bpf_program_add_instructions(BPFProgram *p, const struct bpf_insn *insn, size_t count);
  33 int bpf_program_load_kernel(BPFProgram *p, char *log_buf, size_t log_size);
  34 int bpf_program_load_from_bpf_fs(BPFProgram *p, const char *path);
  35
  36 int bpf_program_cgroup_attach(BPFProgram *p, int type, const char *path, uint32_t flags);
  37 int bpf_program_cgroup_detach(BPFProgram *p);
  38 int bpf_program_pin(int prog_fd, const char *bpffs_path);
  39 int bpf_program_get_id_by_fd(int prog_fd, uint32_t *ret_id);
  40
  41 int bpf_map_new(enum bpf_map_type type, size_t key_size, size_t value_size, size_t max_entries, uint32_t flags);
  42 int bpf_map_update_element(int fd, const void *key, void *value);
  43 int bpf_map_lookup_element(int fd, const void *key, void *value);
  44
  45 int bpf_cgroup_attach_type_from_string(const char *str) _pure_;
  46 const char *bpf_cgroup_attach_type_to_string(int attach_type) _const_;
  47
  48 DEFINE_TRIVIAL_CLEANUP_FUNC(BPFProgram*, bpf_program_unref);