1  /*
       2   * Copyright (c) 2015-2021 Dmitry V. Levin <ldv@strace.io>
       3   * All rights reserved.
       4   *
       5   * SPDX-License-Identifier: LGPL-2.1-or-later
       6   */
       7  
       8  #include "defs.h"
       9  
      10  #include DEF_MPERS_TYPE(struct_sock_fprog)
      11  
      12  #include <linux/filter.h>
      13  typedef struct sock_fprog struct_sock_fprog;
      14  
      15  #include MPERS_DEFS
      16  #include "bpf_fprog.h"
      17  
      18  MPERS_PRINTER_DECL(unsigned int, get_sock_fprog_size, void)
      19  {
      20  	return sizeof(struct_sock_fprog);
      21  }
      22  
      23  MPERS_PRINTER_DECL(bool, fetch_bpf_fprog, struct tcb *const tcp,
      24  		   const kernel_ulong_t addr, void *const p)
      25  {
      26  	struct bpf_fprog *pfp = p;
      27  	struct_sock_fprog mfp;
      28  
      29  	if ((sizeof(*pfp) == sizeof(mfp))
      30  	    && (offsetof(struct bpf_fprog, filter) ==
      31  		offsetof(struct_sock_fprog, filter)))
      32  		return !umove_or_printaddr(tcp, addr, pfp);
      33  
      34  	if (umove_or_printaddr(tcp, addr, &mfp))
      35  		return false;
      36  
      37  	pfp->len = mfp.len;
      38  	pfp->filter =
      39  #ifndef IN_MPERS
      40  		(uintptr_t)
      41  #endif
      42  		mfp.filter;
      43  	return true;
      44  }