1/* Copyright (C) 2003-2020 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 <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 s390 implements fadvice64_64 using a specific struct with arguments
30 packed inside. This is the only implementation handled in arch-specific
31 code. */
32
33#ifndef __NR_fadvise64_64
34# define __NR_fadvise64_64 __NR_fadvise64
35#endif
36
37/* Advice the system about the expected behaviour of the application with
38 respect to the file associated with FD. */
39
40int
41__posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise)
42{
43#ifdef __ASSUME_FADVISE64_64_6ARG
44 int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, fd, advise,
45 SYSCALL_LL64 (offset), SYSCALL_LL64 (len));
46#else
47 int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, fd,
48 __ALIGNMENT_ARG SYSCALL_LL64 (offset),
49 SYSCALL_LL64 (len), advise);
50#endif
51 if (!INTERNAL_SYSCALL_ERROR_P (ret))
52 return 0;
53 return INTERNAL_SYSCALL_ERRNO (ret);
54}
55
56/* The type of the len argument was changed from size_t to off_t in
57 POSIX.1-2003 TC1. */
58#ifndef __OFF_T_MATCHES_OFF64_T
59# if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)
60int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise);
61
62int
63attribute_compat_text_section
64__posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise)
65{
66 return __posix_fadvise64_l64 (fd, offset, len, advise);
67}
68
69versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3);
70compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2);
71# else
72weak_alias (__posix_fadvise64_l64, posix_fadvise64);
73# endif
74#else
75weak_alias (__posix_fadvise64_l64, posix_fadvise64);
76strong_alias (__posix_fadvise64_l64, posix_fadvise);
77#endif
78libc_hidden_def (__posix_fadvise64_l64)
79