1  /* Copyright (C) 2003-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <fcntl.h>
      20  #include <sysdep.h>
      21  #include <shlib-compat.h>
      22  
      23  int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise);
      24  libc_hidden_proto (__posix_fadvise64_l64)
      25  
      26  /* Both arm and powerpc implements fadvise64_64 with last 'advise' argument
      27     just after 'fd' to avoid the requirement of implementing 7-arg syscalls.
      28     ARM also defines __NR_fadvise64_64 as __NR_arm_fadvise64_64.
      29  
      30     s390 implements fadvice64_64 using a specific struct with arguments
      31     packed inside.  This is the only implementation handled in arch-specific
      32     code.  */
      33  
      34  #ifndef __NR_fadvise64_64
      35  # define __NR_fadvise64_64 __NR_fadvise64
      36  #endif
      37  
      38  /* Advice the system about the expected behaviour of the application with
      39     respect to the file associated with FD.  */
      40  
      41  int
      42  __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise)
      43  {
      44  #ifdef __ASSUME_FADVISE64_64_6ARG
      45    int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, fd, advise,
      46  				   SYSCALL_LL64 (offset), SYSCALL_LL64 (len));
      47  #else
      48    int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, fd,
      49  				   __ALIGNMENT_ARG SYSCALL_LL64 (offset),
      50  				   SYSCALL_LL64 (len), advise);
      51  #endif
      52    if (!INTERNAL_SYSCALL_ERROR_P (ret))
      53      return 0;
      54    return INTERNAL_SYSCALL_ERRNO (ret);
      55  }
      56  
      57  /* The type of the len argument was changed from size_t to off_t in
      58     POSIX.1-2003 TC1.  */
      59  #ifndef __OFF_T_MATCHES_OFF64_T
      60  # if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)
      61  int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise);
      62  
      63  int
      64  attribute_compat_text_section
      65  __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise)
      66  {
      67    return __posix_fadvise64_l64 (fd, offset, len, advise);
      68  }
      69  
      70  versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3);
      71  compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2);
      72  # else
      73  weak_alias (__posix_fadvise64_l64, posix_fadvise64);
      74  # endif
      75  #else
      76  weak_alias (__posix_fadvise64_l64, posix_fadvise64);
      77  strong_alias (__posix_fadvise64_l64, posix_fadvise);
      78  #endif
      79  libc_hidden_def (__posix_fadvise64_l64)