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d4697bc9 | 1 | /* Copyright (C) 2007-2014 Free Software Foundation, Inc. |
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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 | |
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15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
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17 | |
18 | #include <fcntl.h> | |
19 | #include <kernel-features.h> | |
20 | #include <sysdep.h> | |
21 | ||
22 | #define posix_fallocate static internal_fallocate | |
23 | #include <sysdeps/posix/posix_fallocate.c> | |
24 | #undef posix_fallocate | |
25 | ||
26 | #if !defined __ASSUME_FALLOCATE && defined __NR_fallocate | |
27 | int __have_fallocate attribute_hidden; | |
28 | #endif | |
29 | ||
5e17d6b7 | 30 | extern int __call_fallocate (int fd, int mode, __off64_t offset, __off64_t len) |
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31 | attribute_hidden; |
32 | ||
33 | /* Reserve storage for the data of the file associated with FD. */ | |
34 | int | |
35 | posix_fallocate (int fd, __off_t offset, __off_t len) | |
36 | { | |
37 | #ifdef __NR_fallocate | |
38 | # ifndef __ASSUME_FALLOCATE | |
a1ffb40e | 39 | if (__glibc_likely (__have_fallocate >= 0)) |
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40 | # endif |
41 | { | |
5e17d6b7 | 42 | int res = __call_fallocate (fd, 0, offset, len); |
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43 | if (! res) |
44 | return 0; | |
45 | ||
46 | # ifndef __ASSUME_FALLOCATE | |
a1ffb40e | 47 | if (__glibc_unlikely (res == ENOSYS)) |
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48 | __have_fallocate = -1; |
49 | else | |
50 | # endif | |
51 | if (res != EOPNOTSUPP) | |
52 | return res; | |
53 | } | |
54 | #endif | |
55 | ||
56 | return internal_fallocate (fd, offset, len); | |
57 | } |