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       1                 :            : /*
       2                 :            :  * Copyright (c) 2015 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_flock)
      31                 :            : #include DEF_MPERS_TYPE(struct_flock64)
      32                 :            : 
      33                 :            : #include "flock.h"
      34                 :            : typedef struct_kernel_flock struct_flock;
      35                 :            : typedef struct_kernel_flock64 struct_flock64;
      36                 :            : 
      37                 :            : #include MPERS_DEFS
      38                 :            : 
      39                 :            : #define SIZEOF_MEMBER(type, member) \
      40                 :            :         sizeof(((type *) NULL)->member)
      41                 :            : 
      42                 :            : #define FLOCK_MEMBERS_EQ(type, member) \
      43                 :            :         (SIZEOF_MEMBER(struct_kernel_flock64, member) == SIZEOF_MEMBER(type, member) \
      44                 :            :          && offsetof(struct_kernel_flock64, member) == offsetof(type, member))
      45                 :            : 
      46                 :            : #define FLOCK_STRUCTS_EQ(type) \
      47                 :            :         (sizeof(struct_kernel_flock64) == sizeof(type) \
      48                 :            :          && FLOCK_MEMBERS_EQ(type, l_type) \
      49                 :            :          && FLOCK_MEMBERS_EQ(type, l_whence) \
      50                 :            :          && FLOCK_MEMBERS_EQ(type, l_start) \
      51                 :            :          && FLOCK_MEMBERS_EQ(type, l_len) \
      52                 :            :          && FLOCK_MEMBERS_EQ(type, l_pid))
      53                 :            : 
      54                 :         30 : MPERS_PRINTER_DECL(bool, fetch_struct_flock, struct tcb *const tcp,
      55                 :            :                    const kernel_ulong_t addr, void *const p)
      56                 :            : {
      57                 :         30 :         struct_kernel_flock64 *pfl = p;
      58                 :            :         struct_flock mfl;
      59                 :            : 
      60                 :            :         if (FLOCK_STRUCTS_EQ(struct_flock))
      61                 :         20 :                 return !umove_or_printaddr(tcp, addr, pfl);
      62                 :            : 
      63         [ -  + ]:         10 :         if (umove_or_printaddr(tcp, addr, &mfl))
      64                 :          0 :                 return false;
      65                 :            : 
      66                 :         10 :         pfl->l_type = mfl.l_type;
      67                 :         10 :         pfl->l_whence = mfl.l_whence;
      68                 :         10 :         pfl->l_start = mfl.l_start;
      69                 :         10 :         pfl->l_len = mfl.l_len;
      70                 :         10 :         pfl->l_pid = mfl.l_pid;
      71                 :         10 :         return true;
      72                 :            : }
      73                 :            : 
      74                 :          7 : MPERS_PRINTER_DECL(bool, fetch_struct_flock64, struct tcb *const tcp,
      75                 :            :                    const kernel_ulong_t addr, void *const p)
      76                 :            : {
      77                 :          7 :         struct_kernel_flock64 *pfl = p;
      78                 :            :         struct_flock64 mfl;
      79                 :            : 
      80                 :            :         if (FLOCK_STRUCTS_EQ(struct_flock64))
      81                 :          0 :                 return !umove_or_printaddr(tcp, addr, pfl);
      82                 :            : 
      83         [ -  + ]:          7 :         if (umove_or_printaddr(tcp, addr, &mfl))
      84                 :          0 :                 return false;
      85                 :            : 
      86                 :          7 :         pfl->l_type = mfl.l_type;
      87                 :          7 :         pfl->l_whence = mfl.l_whence;
      88                 :          7 :         pfl->l_start = mfl.l_start;
      89                 :          7 :         pfl->l_len = mfl.l_len;
      90                 :          7 :         pfl->l_pid = mfl.l_pid;
      91                 :          7 :         return true;
      92                 :            : }