1 /*
2 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "tests.h"
29 #include <asm/unistd.h>
30
31 #ifdef HAVE_READAHEAD
32 /* Check for glibc readahead argument passing bugs. */
33 # ifdef __GLIBC__
34 /*
35 * glibc < 2.8 had an incorrect order of higher and lower parts of offset,
36 * see https://sourceware.org/bugzilla/show_bug.cgi?id=5208
37 */
38 # if !(defined __GLIBC_MINOR__ && \
39 (__GLIBC__ << 16) + __GLIBC_MINOR__ >= (2 << 16) + 8)
40 # undef HAVE_READAHEAD
41 # endif /* glibc < 2.8 */
42 /*
43 * glibc < 2.25 had an incorrect implementation on mips n64,
44 * see https://sourceware.org/bugzilla/show_bug.cgi?id=21026
45 */
46 # if defined LINUX_MIPSN64 && !(defined __GLIBC_MINOR__ && \
47 (__GLIBC__ << 16) + __GLIBC_MINOR__ >= (2 << 16) + 25)
48 # undef HAVE_READAHEAD
49 # endif /* LINUX_MIPSN64 && glibc < 2.25 */
50 # endif /* __GLIBC__ */
51 #endif /* HAVE_READAHEAD */
52
53 #ifdef HAVE_READAHEAD
54
55 # include <fcntl.h>
56 # include <stdio.h>
57
58 static const int fds[] = {
59 -0x80000000,
60 -100,
61 -1,
62 0,
63 1,
64 2,
65 0x7fffffff,
66 };
67
68 static const off64_t offsets[] = {
69 -0x8000000000000000LL,
70 -0x5060708090a0b0c0LL,
71 -1LL,
72 0,
73 1,
74 0xbadfaced,
75 0x7fffffffffffffffLL,
76 };
77
78 static const unsigned long counts[] = {
79 0UL,
80 0xdeadca75,
81 (unsigned long) 0xface1e55beeff00dULL,
82 (unsigned long) 0xffffffffffffffffULL,
83 };
84
85 int
main(void)86 main(void)
87 {
88 unsigned i;
89 unsigned j;
90 unsigned k;
91 ssize_t rc;
92
93 for (i = 0; i < ARRAY_SIZE(fds); i++)
94 for (j = 0; j < ARRAY_SIZE(offsets); j++)
95 for (k = 0; k < ARRAY_SIZE(counts); k++) {
96 rc = readahead(fds[i], offsets[j], counts[k]);
97
98 printf("readahead(%d, %lld, %lu) = %s\n",
99 fds[i], (long long) offsets[j],
100 counts[k], sprintrc(rc));
101 }
102
103 puts("+++ exited with 0 +++");
104 return 0;
105 }
106
107 #else
108
109 SKIP_MAIN_UNDEFINED("HAVE_READAHEAD")
110
111 #endif
112