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) 2016-2018 The strace developers.
   4  * All rights reserved.
   5  *
   6  * SPDX-License-Identifier: LGPL-2.1-or-later
   7  */
   8
   9 #include "defs.h"
  10
  11 #include DEF_MPERS_TYPE(struct_statfs)
  12 #include DEF_MPERS_TYPE(struct_statfs64)
  13
  14 #include <linux/types.h>
  15 #include <asm/statfs.h>
  16 typedef struct statfs struct_statfs;
  17 typedef struct statfs64 struct_statfs64;
  18
  19 #include MPERS_DEFS
  20
  21 #include "statfs.h"
  22
  23 MPERS_PRINTER_DECL(bool, fetch_struct_statfs,
  24                    struct tcb *const tcp, const kernel_ulong_t addr,
  25                    struct strace_statfs *const p)
  26 {
  27         struct_statfs b;
  28
  29         if (umove_or_printaddr(tcp, addr, &b))
  30                 return false;
  31
  32         p->f_type = zero_extend_signed_to_ull(b.f_type);
  33         p->f_bsize = zero_extend_signed_to_ull(b.f_bsize);
  34         p->f_blocks = zero_extend_signed_to_ull(b.f_blocks);
  35         p->f_bfree = zero_extend_signed_to_ull(b.f_bfree);
  36         p->f_bavail = zero_extend_signed_to_ull(b.f_bavail);
  37         p->f_files = zero_extend_signed_to_ull(b.f_files);
  38         p->f_ffree = zero_extend_signed_to_ull(b.f_ffree);
  39 #if defined HAVE_STRUCT_STATFS_F_FSID_VAL
  40         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.val[0]);
  41         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.val[1]);
  42 #elif defined HAVE_STRUCT_STATFS_F_FSID___VAL
  43         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.__val[0]);
  44         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.__val[1]);
  45 #endif
  46         p->f_namelen = zero_extend_signed_to_ull(b.f_namelen);
  47 #ifdef HAVE_STRUCT_STATFS_F_FRSIZE
  48         p->f_frsize = zero_extend_signed_to_ull(b.f_frsize);
  49 #endif
  50 #ifdef HAVE_STRUCT_STATFS_F_FLAGS
  51         p->f_flags = zero_extend_signed_to_ull(b.f_flags);
  52 #endif
  53
  54         return true;
  55 }
  56
  57 #if defined ARM || (defined AARCH64 && defined IN_MPERS)
  58 /* See arch/arm/kernel/sys_oabi-compat.c for details. */
  59 # define COMPAT_STATFS64_PADDED_SIZE (sizeof(struct_statfs64) + 4)
  60 #endif
  61
  62 MPERS_PRINTER_DECL(bool, fetch_struct_statfs64,
  63                    struct tcb *const tcp, const kernel_ulong_t addr,
  64                    const kernel_ulong_t size, struct strace_statfs *const p)
  65 {
  66         struct_statfs64 b;
  67
  68         if (sizeof(b) != size
  69 #ifdef COMPAT_STATFS64_PADDED_SIZE
  70             && sizeof(b) != COMPAT_STATFS64_PADDED_SIZE
  71 #endif
  72            ) {
  73                 printaddr(addr);
  74                 return false;
  75         }
  76
  77         if (umove_or_printaddr(tcp, addr, &b))
  78                 return false;
  79
  80         p->f_type = zero_extend_signed_to_ull(b.f_type);
  81         p->f_bsize = zero_extend_signed_to_ull(b.f_bsize);
  82         p->f_blocks = zero_extend_signed_to_ull(b.f_blocks);
  83         p->f_bfree = zero_extend_signed_to_ull(b.f_bfree);
  84         p->f_bavail = zero_extend_signed_to_ull(b.f_bavail);
  85         p->f_files = zero_extend_signed_to_ull(b.f_files);
  86         p->f_ffree = zero_extend_signed_to_ull(b.f_ffree);
  87 #if defined HAVE_STRUCT_STATFS64_F_FSID_VAL
  88         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.val[0]);
  89         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.val[1]);
  90 #elif defined HAVE_STRUCT_STATFS64_F_FSID___VAL
  91         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.__val[0]);
  92         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.__val[1]);
  93 #endif
  94         p->f_namelen = zero_extend_signed_to_ull(b.f_namelen);
  95 #ifdef HAVE_STRUCT_STATFS64_F_FRSIZE
  96         p->f_frsize = zero_extend_signed_to_ull(b.f_frsize);
  97 #endif
  98 #ifdef HAVE_STRUCT_STATFS64_F_FLAGS
  99         p->f_flags = zero_extend_signed_to_ull(b.f_flags);
 100 #endif
 101
 102         return true;
 103 }