1/* Copyright (C) 2003-2021 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
23int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise);
24libc_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
41int
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)
61int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise);
62
63int
64attribute_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
70versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3);
71compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2);
72# else
73weak_alias (__posix_fadvise64_l64, posix_fadvise64);
74# endif
75#else
76weak_alias (__posix_fadvise64_l64, posix_fadvise64);
77strong_alias (__posix_fadvise64_l64, posix_fadvise);
78#endif
79libc_hidden_def (__posix_fadvise64_l64)
80