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/*
* 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
#define HOLE_BLOCK_SIZE 10000000
void filestress00(void)
{
int fd, i, deleted;
pid_t pid;
ssize_t written;
int64_t remains;
int64_t repeat;
size_t block;
char file_name[256];
char buf[WRITE_BUFFER_SIZE];
fd = -1;
deleted = 1;
pid = getpid();
tests_cat_pid(file_name, "filestress00_test_file_", pid);
srand(pid);
repeat = tests_repeat_parameter;
for (;;) {
/* Open the file */
if (fd == -1) {
fd = open(file_name, O_CREAT | O_WRONLY,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
if (fd == -1 && errno == ENOSPC) {
/* Break if repeat count exceeded */
if (tests_repeat_parameter > 0 && --repeat <= 0)
break;
/* Sleep 2 secs and try again */
sleep(2);
continue;
}
CHECK(fd != -1);
deleted = 0;
if (tests_unlink_flag) {
CHECK(unlink(file_name) != -1);
deleted = 1;
}
}
/* Get a different set of random data */
for (i = 0; i < WRITE_BUFFER_SIZE;++i)
buf[i] = rand();
if (tests_hole_flag) {
/* Make a hole */
CHECK(lseek(fd, tests_size_parameter, SEEK_SET) != -1);
written = write(fd, "!", 1);
if (written <= 0) {
/* File system full */
CHECK(errno == ENOSPC);
errno = 0;
}
CHECK(lseek(fd, 0, SEEK_SET) != -1);
/* Write at set points into the hole */
remains = tests_size_parameter;
while (remains > HOLE_BLOCK_SIZE) {
CHECK(lseek(fd, HOLE_BLOCK_SIZE,
SEEK_CUR) != -1);
written = write(fd, "!", 1);
remains -= HOLE_BLOCK_SIZE;
if (written <= 0) {
/* File system full */
CHECK(errno == ENOSPC);
errno = 0;
break;
}
}
} else {
/* Write data into the file */
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) {
/* File system full */
CHECK(errno == ENOSPC);
errno = 0;
break;
}
remains -= written;
}
}
/* Break if repeat count exceeded */
if (tests_repeat_parameter > 0 && --repeat <= 0)
break;
/* Close if tests_close_flag */
if (tests_close_flag) {
CHECK(close(fd) != -1);
fd = -1;
}
/* Sleep */
if (tests_sleep_parameter > 0) {
unsigned us = tests_sleep_parameter * 1000;
unsigned rand_divisor = RAND_MAX / us;
unsigned s = (us / 2) + (rand() / rand_divisor);
usleep(s);
}
/* Delete if tests_delete flag */
if (!deleted && tests_delete_flag) {
CHECK(unlink(file_name) != -1);
deleted = 1;
}
}
CHECK(close(fd) != -1);
/* Sleep */
if (tests_sleep_parameter > 0) {
unsigned us = tests_sleep_parameter * 1000;
unsigned rand_divisor = RAND_MAX / us;
unsigned s = (us / 2) + (rand() / rand_divisor);
usleep(s);
}
/* Tidy up */
if (!deleted)
CHECK(unlink(file_name) != -1);
}
/* Title of this test */
const char *filestress00_get_title(void)
{
return "File stress test 00";
}
/* Description of this test */
const char *filestress00_get_description(void)
{
return
"Create a file named filestress00_test_file_pid, where " \
"pid is the process id. If the unlink option " \
"(-u or --unlink) is specified, " \
"unlink the file while holding the open file descriptor. " \
"If the hole option (-o or --hole) is specified, " \
"write a single character at the end of the file, creating a " \
"hole. " \
"Write a single character in the hole every 10 million " \
"bytes. " \
"If the hole option is not specified, then the file is " \
"filled with random data. " \
"If the close option (-c or --close) is specified the file " \
"is closed. " \
"If a sleep value is specified, the process sleeps. " \
"If the delete option (-e or --delete) is specified, then " \
"the file is deleted. " \
"If a repeat count is specified, then the task repeats " \
"that number of times. " \
"The repeat count is given by the -n or --repeat option, " \
"otherwise it defaults to 1. " \
"A repeat count of zero repeats forever. " \
"The file size is given by the -z or --size option, " \
"otherwise it defaults to 1000000. " \
"The sleep value is given by the -p or --sleep option, " \
"otherwise it defaults to 0. " \
"Sleep is specified in milliseconds.";
}
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 = 1;
/* Set default test sleep */
tests_sleep_parameter = 0;
/* Handle common arguments */
run_test = tests_get_args(argc, argv, filestress00_get_title(),
filestress00_get_description(), "znpuoce");
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 */
filestress00();
return 0;
}
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