LCOV - code coverage report
Current view: top level - strace - fetch_bpf_fprog.c (source / functions) Hit Total Coverage
Test: strace-4.18.0.129.97bbb Code Coverage Lines: 10 10 100.0 %
Date: 2017-07-31 03:46:08 Functions: 4 6 66.7 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 1 2 50.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
       3                 :            :  * All rights reserved.
       4                 :            :  *
       5                 :            :  * Redistribution and use in source and binary forms, with or without
       6                 :            :  * modification, are permitted provided that the following conditions
       7                 :            :  * are met:
       8                 :            :  * 1. Redistributions of source code must retain the above copyright
       9                 :            :  *    notice, this list of conditions and the following disclaimer.
      10                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      11                 :            :  *    notice, this list of conditions and the following disclaimer in the
      12                 :            :  *    documentation and/or other materials provided with the distribution.
      13                 :            :  * 3. The name of the author may not be used to endorse or promote products
      14                 :            :  *    derived from this software without specific prior written permission.
      15                 :            :  *
      16                 :            :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      17                 :            :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      18                 :            :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      19                 :            :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      20                 :            :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      21                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      22                 :            :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      23                 :            :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      24                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      25                 :            :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      26                 :            :  */
      27                 :            : 
      28                 :            : #include "defs.h"
      29                 :            : 
      30                 :            : #include DEF_MPERS_TYPE(struct_sock_fprog)
      31                 :            : 
      32                 :            : #include <linux/filter.h>
      33                 :            : typedef struct sock_fprog struct_sock_fprog;
      34                 :            : 
      35                 :            : #include MPERS_DEFS
      36                 :            : #include "bpf_fprog.h"
      37                 :            : 
      38                 :          4 : MPERS_PRINTER_DECL(unsigned int, get_sock_fprog_size, void)
      39                 :            : {
      40                 :          4 :         return sizeof(struct_sock_fprog);
      41                 :            : }
      42                 :            : 
      43                 :          4 : MPERS_PRINTER_DECL(bool, fetch_bpf_fprog, struct tcb *const tcp,
      44                 :            :                    const kernel_ulong_t addr, void *const p)
      45                 :            : {
      46                 :          4 :         struct bpf_fprog *pfp = p;
      47                 :            :         struct_sock_fprog mfp;
      48                 :            : 
      49                 :            :         if ((sizeof(*pfp) == sizeof(mfp))
      50                 :            :             && (offsetof(struct bpf_fprog, filter) ==
      51                 :            :                 offsetof(struct_sock_fprog, filter)))
      52                 :          2 :                 return !umove_or_printaddr(tcp, addr, pfp);
      53                 :            : 
      54         [ +  - ]:          2 :         if (umove_or_printaddr(tcp, addr, &mfp))
      55                 :            :                 return false;
      56                 :            : 
      57                 :          2 :         pfp->len = mfp.len;
      58                 :          2 :         pfp->filter =
      59                 :            : #ifndef IN_MPERS
      60                 :            :                 (uintptr_t)
      61                 :            : #endif
      62                 :          2 :                 mfp.filter;
      63                 :          2 :         return true;
      64                 :            : }

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