327 lines
8.3 KiB
C
327 lines
8.3 KiB
C
/*
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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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* diotest5.c
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*
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* DESCRIPTION
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* The programs test buffered and direct IO with vector arrays using
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* readv() and writev() calls.
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* Test blocks
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* [1] Direct readv, Buffered writev
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* [2] Direct writev, Buffered readv
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* [3] Direct readv, Direct writev
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* The bufsize should be in n*4k size for direct readv, writev. The offset
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* value marks the starting position in file from where to start the
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* write and read. (Using larger offset, larger files can be tested).
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* The nvector gives vector array size. Test data file can be
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* specified through commandline and is useful for running test with
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* raw devices as a file.
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*
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* USAGE
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* diotest5 [-b bufsize] [-o offset] [-i iterations]
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* [-v nvector] [-f filename]
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*
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* History
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* 04/29/2002 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 <string.h>
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#include <sys/file.h>
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#include <fcntl.h>
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#include <sys/syscall.h>
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#include <sys/uio.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 = "diotest05"; /* 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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static int bufsize = BUFSIZE; /* Buffer size. Default 4k */
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static int iter = 20; /* Iterations. Default 20 */
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static int nvector = 20; /* Vector array. Default 20 */
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static off64_t offset = 0; /* Start offset. Default 0 */
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static char filename[LEN]; /* Test data file */
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static int fd1 = -1;
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/*
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* runtest: Write the data in vector array to the file. Read the data
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* from the file into another vectory array and verify. Repeat the test.
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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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int i;
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struct iovec *iov1, *iov2, *iovp;
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/* Allocate for buffers and data pointers */
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if ((iov1 =
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(struct iovec *)valloc(sizeof(struct iovec) * nvector)) == NULL) {
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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 ((iov2 =
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(struct iovec *)valloc(sizeof(struct iovec) * nvector)) == NULL) {
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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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for (i = 0, iovp = iov1; i < nvector; iovp++, i++) {
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if ((iovp->iov_base = valloc(bufsize)) == NULL) {
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tst_resm(TFAIL, "valloc for iovp->iov_base: %s",
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strerror(errno));
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return (-1);
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}
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iovp->iov_len = bufsize;
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}
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for (i = 0, iovp = iov2; i < nvector; iovp++, i++) {
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if ((iovp->iov_base = valloc(bufsize)) == NULL) {
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tst_resm(TFAIL, "valloc, iov2 for iovp->iov_base: %s",
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strerror(errno));
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return (-1);
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}
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iovp->iov_len = bufsize;
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}
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/* Test */
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for (i = 0; i < iter; i++) {
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vfillbuf(iov1, nvector, i);
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vfillbuf(iov2, nvector, i + 1);
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if (lseek(fd_w, offset, SEEK_SET) < 0) {
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tst_resm(TFAIL, "lseek before writev failed: %s",
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strerror(errno));
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return (-1);
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}
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if (writev(fd_w, iov1, nvector) < 0) {
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tst_resm(TFAIL, "writev failed: %s", strerror(errno));
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return (-1);
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}
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if (lseek(fd_r, offset, SEEK_SET) < 0) {
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tst_resm(TFAIL, "lseek before readv failed: %s",
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strerror(errno));
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return (-1);
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}
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if (readv(fd_r, iov2, nvector) < 0) {
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tst_resm(TFAIL, "readv failed: %s", strerror(errno));
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return (-1);
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}
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if (vbufcmp(iov1, iov2, nvector) != 0) {
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tst_resm(TFAIL, "readv/writev comparision failed");
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return (-1);
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}
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}
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/* Cleanup */
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for (i = 0, iovp = iov1; i < nvector; iovp++, i++) {
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free(iovp->iov_base);
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}
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for (i = 0, iovp = iov2; i < nvector; iovp++, i++) {
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free(iovp->iov_base);
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}
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free(iov1);
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free(iov2);
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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: diotest5 [-b bufsize] [-o offset] [ -i iteration] [ -v nvector] [-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 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-5.%ld", syscall(__NR_gettid));
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while ((i = getopt(argc, argv, "b:o:i:v: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");
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prg_usage();
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}
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if (bufsize % 4096 != 0) {
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fprintf(stderr, "bufsize must be > 0");
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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 = atoll(optarg)) <= 0) {
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fprintf(stderr, "offset must be > 0");
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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");
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prg_usage();
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}
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break;
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case 'v':
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if ((nvector = atoi(optarg)) <= 0) {
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fprintf(stderr, "vector array must be > 0");
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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, cleanup, "fd_w open failed for %s: %s",
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filename, strerror(errno));
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}
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if ((fd_r = open64(filename, O_DIRECT | O_RDONLY | O_CREAT, 0666)) < 0) {
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tst_brkm(TBROK, cleanup, "fd_r open failed for %s: %s",
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filename, strerror(errno));
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}
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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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unlink(filename);
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close(fd_r);
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close(fd_w);
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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)) < 0) {
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tst_brkm(TBROK, cleanup, "fd_w open failed for %s: %s",
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filename, strerror(errno));
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}
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if ((fd_r = open64(filename, O_RDONLY | O_CREAT, 0666)) < 0) {
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tst_brkm(TBROK, cleanup, "fd_r open failed for %s: %s",
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filename, strerror(errno));
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}
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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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unlink(filename);
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close(fd_r);
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close(fd_w);
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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)) < 0) {
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tst_brkm(TBROK, cleanup, "fd_w open failed for %s: %s",
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filename, strerror(errno));
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}
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if ((fd_r = open64(filename, O_DIRECT | O_RDONLY | O_CREAT, 0666)) < 0) {
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tst_brkm(TBROK, cleanup, "fd_r open failed for %s: %s",
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filename, strerror(errno));
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}
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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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unlink(filename);
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close(fd_r);
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close(fd_w);
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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,
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"%d testblocks %d iterations with %d vector array completed",
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total, iter, nvector);
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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)) < 0) {
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tst_brkm(TBROK, cleanup, "Couldn't create test file %s: %s",
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filename, strerror(errno));
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}
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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)) < 0) {
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tst_brkm(TCONF, cleanup,
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"O_DIRECT is not supported by this filesystem. %s",
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strerror(errno));
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}
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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_resm(TCONF, "O_DIRECT is not defined.");
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return 0;
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}
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#endif /* O_DIRECT */
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