1  /*
       2   * Classic BPF filter block.
       3   *
       4   * Copyright (c) 2015-2021 Dmitry V. Levin <ldv@strace.io>
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: LGPL-2.1-or-later
       8   */
       9  
      10  #ifndef STRACE_BPF_FILTER_H
      11  # define STRACE_BPF_FILTER_H
      12  
      13  struct bpf_filter_block {
      14  	uint16_t code;
      15  	uint8_t jt;
      16  	uint8_t jf;
      17  	uint32_t k;
      18  };
      19  
      20  typedef bool (*print_bpf_filter_fn)(const struct bpf_filter_block *);
      21  
      22  extern void
      23  print_bpf_fprog(struct tcb *const tcp, const kernel_ulong_t addr,
      24  		const unsigned short len, const print_bpf_filter_fn print_k);
      25  
      26  extern void
      27  decode_bpf_fprog(struct tcb *const tcp, const kernel_ulong_t addr,
      28  		 const print_bpf_filter_fn print_k);
      29  
      30  #endif /* !STRACE_BPF_FILTER_H */