1/* Copyright (C) 2003-2018 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 <http://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <fcntl.h>
20#include <shlib-compat.h>
21
22int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise);
23libc_hidden_proto (__posix_fadvise64_l64)
24
25/* Both arm and powerpc implements fadvise64_64 with last 'advise' argument
26 just after 'fd' to avoid the requirement of implementing 7-arg syscalls.
27 ARM also defines __NR_fadvise64_64 as __NR_arm_fadvise64_64.
28
29 tile requires __ASSUME_ALIGNED_REGISTER_PAIRS but implements the 32-bit
30 fadvise64_64 without the padding 0 after fd.
31
32 s390 implements fadvice64_64 using a specific struct with arguments
33 packed inside. This is the only implementation handled in arch-specific
34 code. */
35
36#ifdef __ASSUME_FADVISE64_64_NO_ALIGN
37# undef __ALIGNMENT_ARG
38# define __ALIGNMENT_ARG
39#endif
40
41#ifndef __NR_fadvise64_64
42# define __NR_fadvise64_64 __NR_fadvise64
43#endif
44
45/* Advice the system about the expected behaviour of the application with
46 respect to the file associated with FD. */
47
48int
49__posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise)
50{
51 INTERNAL_SYSCALL_DECL (err);
52#ifdef __ASSUME_FADVISE64_64_6ARG
53 int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, advise,
54 SYSCALL_LL64 (offset), SYSCALL_LL64 (len));
55#else
56 int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd,
57 __ALIGNMENT_ARG SYSCALL_LL64 (offset),
58 SYSCALL_LL64 (len), advise);
59#endif
60 if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
61 return 0;
62 return INTERNAL_SYSCALL_ERRNO (ret, err);
63}
64
65/* The type of the len argument was changed from size_t to off_t in
66 POSIX.1-2003 TC1. */
67#ifndef __OFF_T_MATCHES_OFF64_T
68# if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)
69int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise);
70
71int
72attribute_compat_text_section
73__posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise)
74{
75 return __posix_fadvise64_l64 (fd, offset, len, advise);
76}
77
78versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3);
79compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2);
80# else
81weak_alias (__posix_fadvise64_l64, posix_fadvise64);
82# endif
83#else
84weak_alias (__posix_fadvise64_l64, posix_fadvise64);
85strong_alias (__posix_fadvise64_l64, posix_fadvise);
86#endif
87libc_hidden_def (__posix_fadvise64_l64)
88