LCOV - code coverage report
Current view: top level - strace - mount.c (source / functions) Hit Total Coverage
Test: strace-4.18.0.129.97bbb Code Coverage Lines: 29 29 100.0 %
Date: 2017-07-31 03:46:08 Functions: 1 1 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 16 16 100.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
       3                 :            :  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
       4                 :            :  * Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
       5                 :            :  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
       6                 :            :  * Copyright (c) 2005 Roland McGrath <roland@redhat.com>
       7                 :            :  * Copyright (c) 2007-2015 Dmitry V. Levin <ldv@altlinux.org>
       8                 :            :  * Copyright (c) 2014-2017 The strace developers.
       9                 :            :  * All rights reserved.
      10                 :            :  *
      11                 :            :  * Redistribution and use in source and binary forms, with or without
      12                 :            :  * modification, are permitted provided that the following conditions
      13                 :            :  * are met:
      14                 :            :  * 1. Redistributions of source code must retain the above copyright
      15                 :            :  *    notice, this list of conditions and the following disclaimer.
      16                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      17                 :            :  *    notice, this list of conditions and the following disclaimer in the
      18                 :            :  *    documentation and/or other materials provided with the distribution.
      19                 :            :  * 3. The name of the author may not be used to endorse or promote products
      20                 :            :  *    derived from this software without specific prior written permission.
      21                 :            :  *
      22                 :            :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      23                 :            :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      24                 :            :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      25                 :            :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      26                 :            :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      27                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      28                 :            :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      29                 :            :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      30                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      31                 :            :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      32                 :            :  */
      33                 :            : 
      34                 :            : #include "defs.h"
      35                 :            : 
      36                 :            : #define MS_MGC_VAL      0xc0ed0000      /* old magic mount flag number */
      37                 :            : #define MS_MGC_MSK      0xffff0000      /* old magic mount flag mask */
      38                 :            : 
      39                 :            : #include "xlat/mount_flags.h"
      40                 :            : 
      41                 :         12 : SYS_FUNC(mount)
      42                 :            : {
      43                 :         12 :         bool ignore_type = false;
      44                 :         12 :         bool ignore_data = false;
      45                 :         12 :         bool old_magic = false;
      46                 :         12 :         kernel_ulong_t flags = tcp->u_arg[3];
      47                 :            : 
      48                 :            :         /* Discard magic */
      49         [ +  + ]:         12 :         if ((flags & MS_MGC_MSK) == MS_MGC_VAL) {
      50                 :          4 :                 flags &= ~MS_MGC_MSK;
      51                 :          4 :                 old_magic = true;
      52                 :            :         }
      53                 :            : 
      54         [ +  + ]:         12 :         if (flags & MS_REMOUNT)
      55                 :            :                 ignore_type = true;
      56         [ +  + ]:         10 :         else if (flags & (MS_BIND | MS_MOVE | MS_SHARED
      57                 :            :                           | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
      58                 :          2 :                 ignore_type = ignore_data = true;
      59                 :            : 
      60                 :         12 :         printpath(tcp, tcp->u_arg[0]);
      61                 :         12 :         tprints(", ");
      62                 :            : 
      63                 :         12 :         printpath(tcp, tcp->u_arg[1]);
      64                 :         12 :         tprints(", ");
      65                 :            : 
      66         [ +  + ]:         12 :         if (ignore_type)
      67                 :          4 :                 printaddr(tcp->u_arg[2]);
      68                 :            :         else
      69                 :          8 :                 printstr(tcp, tcp->u_arg[2]);
      70                 :         12 :         tprints(", ");
      71                 :            : 
      72         [ +  + ]:         12 :         if (old_magic) {
      73                 :          4 :                 tprints("MS_MGC_VAL");
      74         [ +  + ]:          4 :                 if (flags)
      75                 :          2 :                         tprints("|");
      76                 :            :         }
      77         [ +  + ]:         12 :         if (flags || !old_magic)
      78                 :            :                 printflags64(mount_flags, flags, "MS_???");
      79                 :         12 :         tprints(", ");
      80                 :            : 
      81         [ +  + ]:         12 :         if (ignore_data)
      82                 :          2 :                 printaddr(tcp->u_arg[4]);
      83                 :            :         else
      84                 :         10 :                 printstr(tcp, tcp->u_arg[4]);
      85                 :            : 
      86                 :         12 :         return RVAL_DECODED;
      87                 :            : }

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