android13/external/ltp/testcases/kernel/fs/lftest/lftest.c

80 lines
1.9 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2001, International Business Machines Corp.
* Copyright (c) 2020, Joerg Vehlow <joerg.vehlow@aox-tech.de>
*
* The purpose of this test is to verify the file size limitations
* of a filesystem. It writes one buffer at a time and lseeks from
* the beginning of the file to the end of the last write position.
* The intent is to test lseek64.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include "tst_test.h"
static char *str_bufnum;
static int bufnum = 100;
static char buf[TST_MB];
static void setup(void)
{
unsigned int i;
if (str_bufnum) {
if (tst_parse_int(str_bufnum, &bufnum, 0, INT_MAX)) {
tst_brk(TBROK, "Invalid buffer count '%s'", str_bufnum);
}
}
buf[0] = 'A';
for (i = 1; i < ARRAY_SIZE(buf) - 1; i++)
buf[i] = '0';
buf[ARRAY_SIZE(buf) - 1] = 'Z';
}
static void run(void)
{
time_t time1, time2;
int i, fd, diff;
time1 = time(NULL);
tst_res(TINFO, "started building a %d megabyte file", bufnum);
if ((fd = creat("large_file", 0755)) == -1)
tst_brk(TBROK | TERRNO, "creat() failed");
for (i = 0; i < bufnum; i++) {
if (write(fd, buf, sizeof(buf)) == -1) {
tst_brk(TFAIL | TERRNO, "write() failed");
}
fsync(fd);
if (lseek(fd, (i + 1) * sizeof(buf), 0) == -1)
tst_brk(TFAIL | TERRNO, "lseek failed");
}
close(fd);
time2 = time(NULL);
tst_res(TINFO, "finished building a %d megabyte file", bufnum);
diff = time2 - time1;
tst_res(TINFO, "total time for test to run: %d minute(s) and %d seconds",
diff / 60, diff % 60);
tst_res(TPASS, "test successfull");
}
static struct tst_test test = {
.options = (struct tst_option[]) {
{"n:", &str_bufnum, "-n COUNT Number of megabytes to write (default 100)"},
{}
},
.needs_tmpdir = 1,
.setup = setup,
.test_all = run
};