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282 lines
7.2 KiB
282 lines
7.2 KiB
/*
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*
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* Copyright (c) International Business Machines Corp., 2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* NAME
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* diotest2.c
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*
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* DESCRIPTION
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* Program tests the combinations of direct and buffered read, write.
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* The bufsize should be in n*4k size for direct read, write. The offset
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* value marks the starting position in file from where to start the
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* read and write. Larger files can be created using the offset parameter.
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* Test data file can be specified through commandline and is useful
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* for running test with raw devices as a file.
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* Test blocks:
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* [1] Direct read, Buffered write
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* [2] Direct write, Buffered read
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* [3] Direct read, Direct write
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*
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* USAGE
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* diotest2 [-b bufsize] [-o offset] [-i iterations] [-f filename]
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*
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* History
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* 04/22/2002 Narasimha Sharoff nsharoff@us.ibm.com
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*
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* RESTRICTIONS
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* None
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/file.h>
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#include <sys/types.h>
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#include <sys/syscall.h>
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#include <errno.h>
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#include "diotest_routines.h"
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#include "test.h"
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char *TCID = "diotest02"; /* Test program identifier. */
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int TST_TOTAL = 3; /* Total number of test conditions */
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#ifdef O_DIRECT
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#define BUFSIZE 4096
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#define TRUE 1
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#define LEN 30
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#define READ_DIRECT 1
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#define WRITE_DIRECT 2
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#define RDWR_DIRECT 3
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int fd1 = -1;
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char filename[LEN];
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int bufsize = BUFSIZE;
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/*
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* runtest: write the data to the file. Read the data from the file and compare.
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* For each iteration, write data starting at offse+iter*bufsize
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* location in the file and read from there.
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*/
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int runtest(int fd_r, int fd_w, int iter, off64_t offset, int action)
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{
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char *buf1;
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char *buf2;
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int i;
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/* Allocate for buffers */
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if ((buf1 = valloc(bufsize)) == 0) {
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tst_resm(TFAIL, "valloc() buf1 failed: %s", strerror(errno));
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return (-1);
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}
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if ((buf2 = valloc(bufsize)) == 0) {
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tst_resm(TFAIL, "valloc() buf2 failed: %s", strerror(errno));
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return (-1);
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}
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/* seek bufsize*iteration and write. seek and read. verify. */
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for (i = 0; i < iter; i++) {
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fillbuf(buf1, bufsize, i);
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if (lseek(fd_w, offset + iter * bufsize, SEEK_SET) < 0) {
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tst_resm(TFAIL, "lseek before write failed: %s",
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strerror(errno));
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return (-1);
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}
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if (write(fd_w, buf1, bufsize) < bufsize) {
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tst_resm(TFAIL, "write failed: %s", strerror(errno));
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return (-1);
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}
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if (lseek(fd_r, offset + iter * bufsize, SEEK_SET) < 0) {
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tst_resm(TFAIL, "lseek before read failed: %s",
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strerror(errno));
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return (-1);
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}
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if (read(fd_r, buf2, bufsize) < bufsize) {
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tst_resm(TFAIL, "read failed: %s", strerror(errno));
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return (-1);
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}
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if (bufcmp(buf1, buf2, bufsize) != 0) {
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tst_resm(TFAIL, "read/write comparision failed");
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return (-1);
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}
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}
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return 0;
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}
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static void prg_usage(void)
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{
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fprintf(stderr,
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"Usage: diotest2 [-b bufsize] [-o offset] [-i iterations] [-f filename]\n");
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exit(1);
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}
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static void setup(void);
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static void cleanup(void);
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int main(int argc, char *argv[])
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{
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int iter = 100; /* Iterations. Default 100 */
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off64_t offset = 0; /* Offset. Default 0 */
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int i, action, fd_r, fd_w;
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int fail_count = 0, total = 0, failed = 0;
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/* Options */
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sprintf(filename, "testdata-2.%ld", syscall(__NR_gettid));
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while ((i = getopt(argc, argv, "b:o:i:f:")) != -1) {
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switch (i) {
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case 'b':
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if ((bufsize = atoi(optarg)) <= 0) {
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fprintf(stderr, "bufsize must be > 0\n");
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prg_usage();
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}
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if (bufsize % 4096 != 0) {
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fprintf(stderr,
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"bufsize must be multiple of 4k\n");
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prg_usage();
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}
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break;
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case 'o':
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if ((offset = atoi(optarg)) <= 0) {
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fprintf(stderr, "offset must be > 0\n");
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prg_usage();
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}
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break;
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case 'i':
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if ((iter = atoi(optarg)) <= 0) {
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fprintf(stderr, "iterations must be > 0\n");
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prg_usage();
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}
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break;
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case 'f':
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strcpy(filename, optarg);
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break;
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default:
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prg_usage();
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}
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}
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setup();
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/* Testblock-1: Read with Direct IO, Write without */
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action = READ_DIRECT;
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if ((fd_w = open(filename, O_WRONLY | O_CREAT, 0666)) < 0)
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tst_brkm(TBROK | TERRNO, cleanup,
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"open(%s, O_WRONLY..) failed", filename);
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if ((fd_r = open(filename, O_DIRECT | O_RDONLY, 0666)) < 0)
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tst_brkm(TBROK | TERRNO, cleanup,
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"open(%s, O_DIRECT|O_RDONLY..) failed", filename);
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if (runtest(fd_r, fd_w, iter, offset, action) < 0) {
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failed = TRUE;
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fail_count++;
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tst_resm(TFAIL, "Read with Direct IO, Write without");
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} else
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tst_resm(TPASS, "Read with Direct IO, Write without");
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close(fd_w);
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close(fd_r);
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unlink(filename);
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total++;
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/* Testblock-2: Write with Direct IO, Read without */
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action = WRITE_DIRECT;
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if ((fd_w = open(filename, O_DIRECT | O_WRONLY | O_CREAT, 0666)) == -1)
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tst_brkm(TBROK | TERRNO, cleanup,
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"open(%s, O_DIRECT|O_WRONLY..) failed", filename);
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if ((fd_r = open(filename, O_RDONLY | O_CREAT, 0666)) == -1)
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tst_brkm(TBROK | TERRNO, cleanup,
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"open(%s, O_RDONLY..) failed", filename);
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if (runtest(fd_r, fd_w, iter, offset, action) < 0) {
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failed = TRUE;
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fail_count++;
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tst_resm(TFAIL, "Write with Direct IO, Read without");
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} else
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tst_resm(TPASS, "Write with Direct IO, Read without");
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close(fd_w);
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close(fd_r);
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unlink(filename);
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total++;
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/* Testblock-3: Read, Write with Direct IO. */
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action = RDWR_DIRECT;
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if ((fd_w = open(filename, O_DIRECT | O_WRONLY | O_CREAT, 0666)) == -1)
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tst_brkm(TBROK | TERRNO, cleanup,
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"open(%s, O_DIRECT|O_WRONLY|O_CREAT, ..) failed",
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filename);
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if ((fd_r = open(filename, O_DIRECT | O_RDONLY | O_CREAT, 0666)) == -1)
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tst_brkm(TBROK | TERRNO, cleanup,
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"open(%s, O_DIRECT|O_RDONLY|O_CREAT, ..) failed",
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filename);
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if (runtest(fd_r, fd_w, iter, offset, action) < 0) {
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failed = TRUE;
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fail_count++;
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tst_resm(TFAIL, "Read, Write with Direct IO");
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} else
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tst_resm(TPASS, "Read, Write with Direct IO");
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close(fd_w);
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close(fd_r);
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unlink(filename);
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total++;
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if (failed)
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tst_resm(TINFO, "%d/%d testblocks failed", fail_count, total);
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else
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tst_resm(TINFO, "%d testblocks %d iterations completed",
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total, iter);
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cleanup();
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tst_exit();
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}
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static void setup(void)
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{
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tst_tmpdir();
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if ((fd1 = open(filename, O_CREAT | O_EXCL, 0600)) == -1)
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tst_brkm(TBROK | TERRNO, cleanup,
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"open(%s, O_CREAT|O_EXCL, ..) failed", filename);
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close(fd1);
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/* Test for filesystem support of O_DIRECT */
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if ((fd1 = open(filename, O_DIRECT, 0600)) == -1)
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tst_brkm(TCONF | TERRNO, cleanup,
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"open(%s, O_DIRECT, ..) failed", filename);
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close(fd1);
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}
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static void cleanup(void)
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{
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if (fd1 != -1)
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unlink(filename);
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tst_rmdir();
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}
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#else /* O_DIRECT */
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int main()
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{
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tst_brkm(TCONF, NULL, "O_DIRECT is not defined.");
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}
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#endif /* O_DIRECT */
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