1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2002 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 21 * NAME 22 * diotest2.c 23 * 24 * DESCRIPTION 25 * Program tests the combinations of direct and buffered read, write. 26 * The bufsize should be in n*4k size for direct read, write. The offset 27 * value marks the starting position in file from where to start the 28 * read and write. Larger files can be created using the offset parameter. 29 * Test data file can be specified through commandline and is useful 30 * for running test with raw devices as a file. 31 * Test blocks: 32 * [1] Direct read, Buffered write 33 * [2] Direct write, Buffered read 34 * [3] Direct read, Direct write 35 * 36 * USAGE 37 * diotest2 [-b bufsize] [-o offset] [-i iterations] [-f filename] 38 * 39 * History 40 * 04/22/2002 Narasimha Sharoff nsharoff (at) us.ibm.com 41 * 42 * RESTRICTIONS 43 * None 44 */ 45 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 #include <fcntl.h> 50 #include <string.h> 51 #include <sys/file.h> 52 #include <sys/types.h> 53 #include <sys/syscall.h> 54 #include <errno.h> 55 56 #include "diotest_routines.h" 57 58 #include "test.h" 59 60 char *TCID = "diotest02"; /* Test program identifier. */ 61 int TST_TOTAL = 3; /* Total number of test conditions */ 62 63 #ifdef O_DIRECT 64 65 #define BUFSIZE 4096 66 #define TRUE 1 67 #define LEN 30 68 #define READ_DIRECT 1 69 #define WRITE_DIRECT 2 70 #define RDWR_DIRECT 3 71 72 int fd1 = -1; 73 char filename[LEN]; 74 int bufsize = BUFSIZE; 75 76 /* 77 * runtest: write the data to the file. Read the data from the file and compare. 78 * For each iteration, write data starting at offse+iter*bufsize 79 * location in the file and read from there. 80 */ 81 int runtest(int fd_r, int fd_w, int iter, off64_t offset, int action) 82 { 83 char *buf1; 84 char *buf2; 85 int i; 86 87 /* Allocate for buffers */ 88 if ((buf1 = valloc(bufsize)) == 0) { 89 tst_resm(TFAIL, "valloc() buf1 failed: %s", strerror(errno)); 90 return (-1); 91 } 92 if ((buf2 = valloc(bufsize)) == 0) { 93 tst_resm(TFAIL, "valloc() buf2 failed: %s", strerror(errno)); 94 return (-1); 95 } 96 97 /* seek bufsize*iteration and write. seek and read. verify. */ 98 for (i = 0; i < iter; i++) { 99 fillbuf(buf1, bufsize, i); 100 if (lseek(fd_w, offset + iter * bufsize, SEEK_SET) < 0) { 101 tst_resm(TFAIL, "lseek before write failed: %s", 102 strerror(errno)); 103 return (-1); 104 } 105 if (write(fd_w, buf1, bufsize) < bufsize) { 106 tst_resm(TFAIL, "write failed: %s", strerror(errno)); 107 return (-1); 108 } 109 if (lseek(fd_r, offset + iter * bufsize, SEEK_SET) < 0) { 110 tst_resm(TFAIL, "lseek before read failed: %s", 111 strerror(errno)); 112 return (-1); 113 } 114 if (read(fd_r, buf2, bufsize) < bufsize) { 115 tst_resm(TFAIL, "read failed: %s", strerror(errno)); 116 return (-1); 117 } 118 if (bufcmp(buf1, buf2, bufsize) != 0) { 119 tst_resm(TFAIL, "read/write comparision failed"); 120 return (-1); 121 } 122 } 123 return 0; 124 } 125 126 static void prg_usage(void) 127 { 128 fprintf(stderr, 129 "Usage: diotest2 [-b bufsize] [-o offset] [-i iterations] [-f filename]\n"); 130 exit(1); 131 } 132 133 static void setup(void); 134 static void cleanup(void); 135 136 int main(int argc, char *argv[]) 137 { 138 int iter = 100; /* Iterations. Default 100 */ 139 off64_t offset = 0; /* Offset. Default 0 */ 140 int i, action, fd_r, fd_w; 141 int fail_count = 0, total = 0, failed = 0; 142 143 /* Options */ 144 sprintf(filename, "testdata-2.%ld", syscall(__NR_gettid)); 145 while ((i = getopt(argc, argv, "b:o:i:f:")) != -1) { 146 switch (i) { 147 case 'b': 148 if ((bufsize = atoi(optarg)) <= 0) { 149 fprintf(stderr, "bufsize must be > 0\n"); 150 prg_usage(); 151 } 152 if (bufsize % 4096 != 0) { 153 fprintf(stderr, 154 "bufsize must be multiple of 4k\n"); 155 prg_usage(); 156 } 157 break; 158 case 'o': 159 if ((offset = atoi(optarg)) <= 0) { 160 fprintf(stderr, "offset must be > 0\n"); 161 prg_usage(); 162 } 163 break; 164 case 'i': 165 if ((iter = atoi(optarg)) <= 0) { 166 fprintf(stderr, "iterations must be > 0\n"); 167 prg_usage(); 168 } 169 break; 170 case 'f': 171 strcpy(filename, optarg); 172 break; 173 default: 174 prg_usage(); 175 } 176 } 177 178 setup(); 179 180 /* Testblock-1: Read with Direct IO, Write without */ 181 action = READ_DIRECT; 182 if ((fd_w = open(filename, O_WRONLY | O_CREAT, 0666)) < 0) 183 tst_brkm(TBROK | TERRNO, cleanup, 184 "open(%s, O_WRONLY..) failed", filename); 185 if ((fd_r = open(filename, O_DIRECT | O_RDONLY, 0666)) < 0) 186 tst_brkm(TBROK | TERRNO, cleanup, 187 "open(%s, O_DIRECT|O_RDONLY..) failed", filename); 188 if (runtest(fd_r, fd_w, iter, offset, action) < 0) { 189 failed = TRUE; 190 fail_count++; 191 tst_resm(TFAIL, "Read with Direct IO, Write without"); 192 } else 193 tst_resm(TPASS, "Read with Direct IO, Write without"); 194 close(fd_w); 195 close(fd_r); 196 unlink(filename); 197 total++; 198 199 /* Testblock-2: Write with Direct IO, Read without */ 200 action = WRITE_DIRECT; 201 if ((fd_w = open(filename, O_DIRECT | O_WRONLY | O_CREAT, 0666)) == -1) 202 tst_brkm(TBROK | TERRNO, cleanup, 203 "open(%s, O_DIRECT|O_WRONLY..) failed", filename); 204 if ((fd_r = open(filename, O_RDONLY | O_CREAT, 0666)) == -1) 205 tst_brkm(TBROK | TERRNO, cleanup, 206 "open(%s, O_RDONLY..) failed", filename); 207 if (runtest(fd_r, fd_w, iter, offset, action) < 0) { 208 failed = TRUE; 209 fail_count++; 210 tst_resm(TFAIL, "Write with Direct IO, Read without"); 211 } else 212 tst_resm(TPASS, "Write with Direct IO, Read without"); 213 close(fd_w); 214 close(fd_r); 215 unlink(filename); 216 total++; 217 218 /* Testblock-3: Read, Write with Direct IO. */ 219 action = RDWR_DIRECT; 220 if ((fd_w = open(filename, O_DIRECT | O_WRONLY | O_CREAT, 0666)) == -1) 221 tst_brkm(TBROK | TERRNO, cleanup, 222 "open(%s, O_DIRECT|O_WRONLY|O_CREAT, ..) failed", 223 filename); 224 if ((fd_r = open(filename, O_DIRECT | O_RDONLY | O_CREAT, 0666)) == -1) 225 tst_brkm(TBROK | TERRNO, cleanup, 226 "open(%s, O_DIRECT|O_RDONLY|O_CREAT, ..) failed", 227 filename); 228 if (runtest(fd_r, fd_w, iter, offset, action) < 0) { 229 failed = TRUE; 230 fail_count++; 231 tst_resm(TFAIL, "Read, Write with Direct IO"); 232 } else 233 tst_resm(TPASS, "Read, Write with Direct IO"); 234 close(fd_w); 235 close(fd_r); 236 unlink(filename); 237 total++; 238 239 if (failed) 240 tst_resm(TINFO, "%d/%d testblocks failed", fail_count, total); 241 else 242 tst_resm(TINFO, "%d testblocks %d iterations completed", 243 total, iter); 244 cleanup(); 245 246 tst_exit(); 247 248 } 249 250 static void setup(void) 251 { 252 tst_tmpdir(); 253 254 if ((fd1 = open(filename, O_CREAT | O_EXCL, 0600)) == -1) 255 tst_brkm(TBROK | TERRNO, cleanup, 256 "open(%s, O_CREAT|O_EXCL, ..) failed", filename); 257 close(fd1); 258 259 /* Test for filesystem support of O_DIRECT */ 260 if ((fd1 = open(filename, O_DIRECT, 0600)) == -1) 261 tst_brkm(TCONF | TERRNO, cleanup, 262 "open(%s, O_DIRECT, ..) failed", filename); 263 close(fd1); 264 265 } 266 267 static void cleanup(void) 268 { 269 if (fd1 != -1) 270 unlink(filename); 271 272 tst_rmdir(); 273 274 } 275 276 #else /* O_DIRECT */ 277 int main() 278 { 279 tst_brkm(TCONF, NULL, "O_DIRECT is not defined."); 280 } 281 #endif /* O_DIRECT */ 282
