/*
*
* Copyright (c) International Business Machines Corp., 2002
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* NAME
* diotest2.c
*
* DESCRIPTION
* Program tests the combinations of direct and buffered read, write.
* The bufsize should be in n*4k size for direct read, write. The offset
* value marks the starting position in file from where to start the
* read and write. Larger files can be created using the offset parameter.
* Test data file can be specified through commandline and is useful
* for running test with raw devices as a file.
* Test blocks:
* [1] Direct read, Buffered write
* [2] Direct write, Buffered read
* [3] Direct read, Direct write
*
* USAGE
* diotest2 [-b bufsize] [-o offset] [-i iterations] [-f filename]
*
* History
* 04/22/2002 Narasimha Sharoff nsharoff@us.ibm.com
*
* RESTRICTIONS
* None
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/file.h>
#include <sys/types.h>
#include <sys/syscall.h>
#include <errno.h>
#include "diotest_routines.h"
#include "test.h"
char *TCID = "diotest02"; /* Test program identifier. */
int TST_TOTAL = 3; /* Total number of test conditions */
#ifdef O_DIRECT
#define BUFSIZE 4096
#define TRUE 1
#define LEN 30
#define READ_DIRECT 1
#define WRITE_DIRECT 2
#define RDWR_DIRECT 3
int fd1 = -1;
char filename[LEN];
int bufsize = BUFSIZE;
/*
* runtest: write the data to the file. Read the data from the file and compare.
* For each iteration, write data starting at offse+iter*bufsize
* location in the file and read from there.
*/
int runtest(int fd_r, int fd_w, int iter, off64_t offset, int action)
{
char *buf1;
char *buf2;
int i;
/* Allocate for buffers */
if ((buf1 = valloc(bufsize)) == 0) {
tst_resm(TFAIL, "valloc() buf1 failed: %s", strerror(errno));
return (-1);
}
if ((buf2 = valloc(bufsize)) == 0) {
tst_resm(TFAIL, "valloc() buf2 failed: %s", strerror(errno));
return (-1);
}
/* seek bufsize*iteration and write. seek and read. verify. */
for (i = 0; i < iter; i++) {
fillbuf(buf1, bufsize, i);
if (lseek(fd_w, offset + iter * bufsize, SEEK_SET) < 0) {
tst_resm(TFAIL, "lseek before write failed: %s",
strerror(errno));
return (-1);
}
if (write(fd_w, buf1, bufsize) < bufsize) {
tst_resm(TFAIL, "write failed: %s", strerror(errno));
return (-1);
}
if (lseek(fd_r, offset + iter * bufsize, SEEK_SET) < 0) {
tst_resm(TFAIL, "lseek before read failed: %s",
strerror(errno));
return (-1);
}
if (read(fd_r, buf2, bufsize) < bufsize) {
tst_resm(TFAIL, "read failed: %s", strerror(errno));
return (-1);
}
if (bufcmp(buf1, buf2, bufsize) != 0) {
tst_resm(TFAIL, "read/write comparision failed");
return (-1);
}
}
return 0;
}
static void prg_usage(void)
{
fprintf(stderr,
"Usage: diotest2 [-b bufsize] [-o offset] [-i iterations] [-f filename]\n");
exit(1);
}
static void setup(void);
static void cleanup(void);
int main(int argc, char *argv[])
{
int iter = 100; /* Iterations. Default 100 */
off64_t offset = 0; /* Offset. Default 0 */
int i, action, fd_r, fd_w;
int fail_count = 0, total = 0, failed = 0;
/* Options */
sprintf(filename, "testdata-2.%ld", syscall(__NR_gettid));
while ((i = getopt(argc, argv, "b:o:i:f:")) != -1) {
switch (i) {
case 'b':
if ((bufsize = atoi(optarg)) <= 0) {
fprintf(stderr, "bufsize must be > 0\n");
prg_usage();
}
if (bufsize % 4096 != 0) {
fprintf(stderr,
"bufsize must be multiple of 4k\n");
prg_usage();
}
break;
case 'o':
if ((offset = atoi(optarg)) <= 0) {
fprintf(stderr, "offset must be > 0\n");
prg_usage();
}
break;
case 'i':
if ((iter = atoi(optarg)) <= 0) {
fprintf(stderr, "iterations must be > 0\n");
prg_usage();
}
break;
case 'f':
strcpy(filename, optarg);
break;
default:
prg_usage();
}
}
setup();
/* Testblock-1: Read with Direct IO, Write without */
action = READ_DIRECT;
if ((fd_w = open(filename, O_WRONLY | O_CREAT, 0666)) < 0)
tst_brkm(TBROK | TERRNO, cleanup,
"open(%s, O_WRONLY..) failed", filename);
if ((fd_r = open(filename, O_DIRECT | O_RDONLY, 0666)) < 0)
tst_brkm(TBROK | TERRNO, cleanup,
"open(%s, O_DIRECT|O_RDONLY..) failed", filename);
if (runtest(fd_r, fd_w, iter, offset, action) < 0) {
failed = TRUE;
fail_count++;
tst_resm(TFAIL, "Read with Direct IO, Write without");
} else
tst_resm(TPASS, "Read with Direct IO, Write without");
close(fd_w);
close(fd_r);
unlink(filename);
total++;
/* Testblock-2: Write with Direct IO, Read without */
action = WRITE_DIRECT;
if ((fd_w = open(filename, O_DIRECT | O_WRONLY | O_CREAT, 0666)) == -1)
tst_brkm(TBROK | TERRNO, cleanup,
"open(%s, O_DIRECT|O_WRONLY..) failed", filename);
if ((fd_r = open(filename, O_RDONLY | O_CREAT, 0666)) == -1)
tst_brkm(TBROK | TERRNO, cleanup,
"open(%s, O_RDONLY..) failed", filename);
if (runtest(fd_r, fd_w, iter, offset, action) < 0) {
failed = TRUE;
fail_count++;
tst_resm(TFAIL, "Write with Direct IO, Read without");
} else
tst_resm(TPASS, "Write with Direct IO, Read without");
close(fd_w);
close(fd_r);
unlink(filename);
total++;
/* Testblock-3: Read, Write with Direct IO. */
action = RDWR_DIRECT;
if ((fd_w = open(filename, O_DIRECT | O_WRONLY | O_CREAT, 0666)) == -1)
tst_brkm(TBROK | TERRNO, cleanup,
"open(%s, O_DIRECT|O_WRONLY|O_CREAT, ..) failed",
filename);
if ((fd_r = open(filename, O_DIRECT | O_RDONLY | O_CREAT, 0666)) == -1)
tst_brkm(TBROK | TERRNO, cleanup,
"open(%s, O_DIRECT|O_RDONLY|O_CREAT, ..) failed",
filename);
if (runtest(fd_r, fd_w, iter, offset, action) < 0) {
failed = TRUE;
fail_count++;
tst_resm(TFAIL, "Read, Write with Direct IO");
} else
tst_resm(TPASS, "Read, Write with Direct IO");
close(fd_w);
close(fd_r);
unlink(filename);
total++;
if (failed)
tst_resm(TINFO, "%d/%d testblocks failed", fail_count, total);
else
tst_resm(TINFO, "%d testblocks %d iterations completed",
total, iter);
cleanup();
tst_exit();
}
static void setup(void)
{
tst_tmpdir();
if ((fd1 = open(filename, O_CREAT | O_EXCL, 0600)) == -1)
tst_brkm(TBROK | TERRNO, cleanup,
"open(%s, O_CREAT|O_EXCL, ..) failed", filename);
close(fd1);
/* Test for filesystem support of O_DIRECT */
if ((fd1 = open(filename, O_DIRECT, 0600)) == -1)
tst_brkm(TCONF | TERRNO, cleanup,
"open(%s, O_DIRECT, ..) failed", filename);
close(fd1);
}
static void cleanup(void)
{
if (fd1 != -1)
unlink(filename);
tst_rmdir();
}
#else /* O_DIRECT */
int main()
{
tst_brkm(TCONF, NULL, "O_DIRECT is not defined.");
}
#endif /* O_DIRECT */