granicus.if.org Git - strace/blob - fetch_struct_statfs.c

   1 /*
   2  * Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
   3  * Copyright (c) 2016-2017 The strace developers.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "defs.h"
  30
  31 #include DEF_MPERS_TYPE(struct_statfs)
  32 #include DEF_MPERS_TYPE(struct_statfs64)
  33
  34 #include <linux/types.h>
  35 #include <asm/statfs.h>
  36 typedef struct statfs struct_statfs;
  37 typedef struct statfs64 struct_statfs64;
  38
  39 #include MPERS_DEFS
  40
  41 #include "statfs.h"
  42
  43 MPERS_PRINTER_DECL(bool, fetch_struct_statfs,
  44                    struct tcb *const tcp, const kernel_ulong_t addr,
  45                    struct strace_statfs *const p)
  46 {
  47         struct_statfs b;
  48
  49         if (umove_or_printaddr(tcp, addr, &b))
  50                 return false;
  51
  52         p->f_type = zero_extend_signed_to_ull(b.f_type);
  53         p->f_bsize = zero_extend_signed_to_ull(b.f_bsize);
  54         p->f_blocks = zero_extend_signed_to_ull(b.f_blocks);
  55         p->f_bfree = zero_extend_signed_to_ull(b.f_bfree);
  56         p->f_bavail = zero_extend_signed_to_ull(b.f_bavail);
  57         p->f_files = zero_extend_signed_to_ull(b.f_files);
  58         p->f_ffree = zero_extend_signed_to_ull(b.f_ffree);
  59 #if defined HAVE_STRUCT_STATFS_F_FSID_VAL
  60         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.val[0]);
  61         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.val[1]);
  62 #elif defined HAVE_STRUCT_STATFS_F_FSID___VAL
  63         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.__val[0]);
  64         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.__val[1]);
  65 #endif
  66         p->f_namelen = zero_extend_signed_to_ull(b.f_namelen);
  67 #ifdef HAVE_STRUCT_STATFS_F_FRSIZE
  68         p->f_frsize = zero_extend_signed_to_ull(b.f_frsize);
  69 #endif
  70 #ifdef HAVE_STRUCT_STATFS_F_FLAGS
  71         p->f_flags = zero_extend_signed_to_ull(b.f_flags);
  72 #endif
  73
  74         return true;
  75 }
  76
  77 #if defined ARM || (defined AARCH64 && defined IN_MPERS)
  78 /* See arch/arm/kernel/sys_oabi-compat.c for details. */
  79 # define COMPAT_STATFS64_PADDED_SIZE (sizeof(struct_statfs64) + 4)
  80 #endif
  81
  82 MPERS_PRINTER_DECL(bool, fetch_struct_statfs64,
  83                    struct tcb *const tcp, const kernel_ulong_t addr,
  84                    const kernel_ulong_t size, struct strace_statfs *const p)
  85 {
  86         struct_statfs64 b;
  87
  88         if (sizeof(b) != size
  89 #ifdef COMPAT_STATFS64_PADDED_SIZE
  90             && sizeof(b) != COMPAT_STATFS64_PADDED_SIZE
  91 #endif
  92            ) {
  93                 printaddr(addr);
  94                 return false;
  95         }
  96
  97         if (umove_or_printaddr(tcp, addr, &b))
  98                 return false;
  99
 100         p->f_type = zero_extend_signed_to_ull(b.f_type);
 101         p->f_bsize = zero_extend_signed_to_ull(b.f_bsize);
 102         p->f_blocks = zero_extend_signed_to_ull(b.f_blocks);
 103         p->f_bfree = zero_extend_signed_to_ull(b.f_bfree);
 104         p->f_bavail = zero_extend_signed_to_ull(b.f_bavail);
 105         p->f_files = zero_extend_signed_to_ull(b.f_files);
 106         p->f_ffree = zero_extend_signed_to_ull(b.f_ffree);
 107 #if defined HAVE_STRUCT_STATFS64_F_FSID_VAL
 108         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.val[0]);
 109         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.val[1]);
 110 #elif defined HAVE_STRUCT_STATFS64_F_FSID___VAL
 111         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.__val[0]);
 112         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.__val[1]);
 113 #endif
 114         p->f_namelen = zero_extend_signed_to_ull(b.f_namelen);
 115 #ifdef HAVE_STRUCT_STATFS64_F_FRSIZE
 116         p->f_frsize = zero_extend_signed_to_ull(b.f_frsize);
 117 #endif
 118 #ifdef HAVE_STRUCT_STATFS64_F_FLAGS
 119         p->f_flags = zero_extend_signed_to_ull(b.f_flags);
 120 #endif
 121
 122         return true;
 123 }