1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/*
* Copyright (C) 2007 Nokia Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Author: Adrian Hunter
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "tests.h"
#define WRITE_BUFFER_SIZE 32768
void stress_2(void)
{
int fd, i;
pid_t pid;
ssize_t written;
int64_t remains;
int64_t repeat;
size_t block;
char *file_name;
char buf[WRITE_BUFFER_SIZE];
file_name = "stress_2_test_file";
fd = open(file_name, O_CREAT | O_WRONLY,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
CHECK(fd != -1);
CHECK(unlink(file_name) != -1);
pid = getpid();
srand(pid);
repeat = tests_repeat_parameter;
for (;;) {
for (i = 0; i < WRITE_BUFFER_SIZE;++i)
buf[i] = rand();
CHECK(lseek(fd, 0, SEEK_SET) != -1);
remains = tests_size_parameter;
while (remains > 0) {
if (remains > WRITE_BUFFER_SIZE)
block = WRITE_BUFFER_SIZE;
else
block = remains;
written = write(fd, buf, block);
if (written <= 0) {
CHECK(errno == ENOSPC); /* File system full */
errno = 0;
break;
}
remains -= written;
}
if (tests_repeat_parameter > 0 && --repeat <= 0)
break;
}
CHECK(close(fd) != -1);
}
/* Title of this test */
const char *stress_2_get_title(void)
{
return "Create / overwrite a large deleted file";
}
/* Description of this test */
const char *stress_2_get_description(void)
{
return
"Create a file named stress_2_test_file. " \
"Open it, delete it while holding the open file descriptor, " \
"then fill it with random data. " \
"Repeated re-write the file some number of times. " \
"The repeat count is given by the -n or --repeat option, " \
"otherwise it defaults to 10. " \
"The file size is given by the -z or --size option, " \
"otherwise it defaults to 1000000.";
}
int main(int argc, char *argv[])
{
int run_test;
/* Set default test file size */
tests_size_parameter = 1000000;
/* Set default test repetition */
tests_repeat_parameter = 10;
/* Handle common arguments */
run_test = tests_get_args(argc, argv, stress_2_get_title(),
stress_2_get_description(), "zn");
if (!run_test)
return 1;
/* Change directory to the file system and check it is ok for testing */
tests_check_test_file_system();
/* Do the actual test */
stress_2();
return 0;
}
|
