1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2002 4 * Copyright (c) Cyril Hrubis chrubis (at) suse.cz 2009 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 14 * the GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 /* 22 * NAME 23 * ftest07.c -- test file I/O with readv and writev (ported from SPIE, 24 * section2/filesuite/ftest9.c 25 * 26 * this is the same as ftest4, except that it uses lseek64 27 * 28 * CALLS 29 * lseek64, readv, writev, 30 * truncate, ftruncate, fsync, sync, fstat 31 * 32 * ALGORITHM 33 * A bitmap is used to map pieces of a file. 34 * Loop: pick a random piece of the file 35 * if we haven't seen it before make sure it is zero, 36 * write pattern 37 * if we have seen it before make sure correct pattern. 38 * 39 * This was originally written by rbk - was program tfio.c 40 * Modified by dale to integrate with test suites. 41 * Modified by G. Stevens to use readv and writev. 42 * Modofied by K. Hakim to integrate with SPIES. 43 * 44 * RESTRICTIONS 45 * 1. Runs a long time with default args - can take others on input 46 * line. Use with "term mode". 47 * If run on vax the ftruncate will not be random - will always go to 48 * start of file. NOTE: produces a very high load average!! 49 * 50 * 2. The "csize" argument must be evenly divisible by MAXIOVCNT. 51 * 52 * CAUTION!! 53 * If a file is supplied to this program with the "-f" option 54 * it will be removed with a system("rm -rf filename") call. 55 * 56 * 57 */ 58 59 #define _XOPEN_SOURCE 500 60 #define _LARGEFILE64_SOURCE 1 61 #include <sys/types.h> 62 #include <sys/param.h> 63 #include <sys/wait.h> 64 #include <sys/stat.h> 65 #include <errno.h> 66 #include <sys/uio.h> 67 #include <fcntl.h> 68 #include <signal.h> 69 #include <stdio.h> 70 #include <unistd.h> 71 #include <inttypes.h> 72 #include "test.h" 73 #include "libftest.h" 74 75 char *TCID = "ftest07"; 76 int TST_TOTAL = 1; 77 78 #define PASSED 1 79 #define FAILED 0 80 81 #define MAXCHILD 25 82 #define K_1 1024 83 #define K_2 2048 84 #define K_4 4096 85 #define MAXIOVCNT 16 86 87 static void setup(void); 88 static void runtest(void); 89 static void dotest(int, int, int); 90 static void domisc(int, int, char *); 91 static void term(int sig); 92 93 static int csize; /* chunk size */ 94 static int iterations; /* # total iterations */ 95 static off64_t max_size; /* max file size */ 96 static int misc_intvl; /* for doing misc things; 0 ==> no */ 97 static int nchild; /* how many children */ 98 static int fd; /* file descriptor used by child */ 99 static int parent_pid; 100 static int pidlist[MAXCHILD]; 101 static char test_name[2]; /* childs test directory name */ 102 103 static char fuss[MAXPATHLEN]; /* directory to do this in */ 104 static char homedir[MAXPATHLEN]; /* where we started */ 105 106 static int local_flag; 107 108 int main(int ac, char *av[]) 109 { 110 int lc; 111 112 tst_parse_opts(ac, av, NULL, NULL); 113 114 setup(); 115 116 for (lc = 0; TEST_LOOPING(lc); lc++) { 117 118 local_flag = PASSED; 119 120 runtest(); 121 122 if (local_flag == PASSED) 123 tst_resm(TPASS, "Test passed."); 124 else 125 tst_resm(TFAIL, "Test failed."); 126 127 tst_rmdir(); 128 tst_exit(); 129 130 } 131 132 tst_exit(); 133 } 134 135 static void setup(void) 136 { 137 char wdbuf[MAXPATHLEN], *cwd; 138 139 /* 140 * Make a directory to do this in; ignore error if already exists. 141 * Save starting directory. 142 */ 143 if ((cwd = getcwd(homedir, sizeof(homedir))) == NULL) { 144 tst_brkm(TBROK, NULL, "Failed to get corrent directory"); 145 } 146 147 parent_pid = getpid(); 148 tst_tmpdir(); 149 if (!fuss[0]) 150 sprintf(fuss, "%s/ftest07.%d", getcwd(wdbuf, sizeof(wdbuf)), 151 getpid()); 152 153 mkdir(fuss, 0755); 154 155 if (chdir(fuss) < 0) { 156 tst_brkm(TBROK, NULL, "\tCan't chdir(%s), error %d.", fuss, 157 errno); 158 } 159 160 /* 161 * Default values for run conditions. 162 */ 163 164 iterations = 10; 165 nchild = 5; 166 csize = K_2; /* should run with 1, 2, and 4 K sizes */ 167 max_size = K_1 * K_1; 168 misc_intvl = 10; 169 170 if (sigset(SIGTERM, term) == SIG_ERR) { 171 tst_brkm(TBROK | TERRNO, NULL, "sigset (signo=SIGTERM) failed"); 172 } 173 174 } 175 176 static void runtest(void) 177 { 178 pid_t pid; 179 int child, count, i, nwait, status; 180 181 nwait = 0; 182 183 for (i = 0; i < nchild; i++) { 184 test_name[0] = 'a' + i; 185 test_name[1] = '\0'; 186 fd = open(test_name, O_RDWR | O_CREAT | O_TRUNC, 0666); 187 if (fd < 0) { 188 tst_brkm(TBROK, NULL, "\tError %d creating %s/%s.", 189 errno, 190 fuss, test_name); 191 } 192 193 if ((child = fork()) == 0) { 194 dotest(nchild, i, fd); 195 tst_exit(); 196 } 197 198 close(fd); 199 200 if (child < 0) { 201 tst_brkm(TBROK | TERRNO, NULL, "fork failed"); 202 } else { 203 pidlist[i] = child; 204 nwait++; 205 } 206 } 207 208 /* 209 * Wait for children to finish. 210 */ 211 count = 0; 212 while (1) { 213 if ((child = wait(&status)) >= 0) { 214 //tst_resm(TINFO, "\tTest{%d} exited status = 0x%x", child, status); 215 if (status) { 216 tst_resm(TFAIL, 217 "\tTest{%d} failed, expected 0 exit.", 218 child); 219 local_flag = FAILED; 220 } 221 ++count; 222 } else { 223 if (errno != EINTR) 224 break; 225 } 226 } 227 228 /* 229 * Should have collected all children. 230 */ 231 232 if (count != nwait) { 233 tst_resm(TFAIL, "\tWrong # children waited on, count = %d", 234 count); 235 local_flag = FAILED; 236 } 237 238 chdir(homedir); 239 240 pid = fork(); 241 if (pid < 0) { 242 tst_brkm(TBROK | TERRNO, NULL, "fork failed"); 243 } 244 245 if (pid == 0) { 246 execl("/bin/rm", "rm", "-rf", fuss, NULL); 247 exit(1); 248 } else 249 wait(&status); 250 if (status) { 251 tst_resm(TINFO, "CAUTION - ftest07, '%s' may not be removed", 252 fuss); 253 } 254 255 sync(); 256 } 257 258 /* 259 * dotest() 260 * Children execute this. 261 * 262 * Randomly read/mod/write chunks with known pattern and check. 263 * When fill sectors, iterate. 264 */ 265 266 #define NMISC 4 267 enum m_type { m_fsync, m_trunc, m_sync, m_fstat }; 268 char *m_str[] = { "fsync", "trunc", "sync", "fstat" }; 269 270 int misc_cnt[NMISC]; /* counts # of each kind of misc */ 271 long long unsigned int file_max; /* file-max size */ 272 int nchunks; 273 int last_trunc = -1; 274 int tr_flag; 275 enum m_type type = m_fsync; 276 277 static inline long long unsigned int CHUNK(off64_t i) 278 { 279 return (long long unsigned int) i * csize; 280 } 281 #define NEXTMISC ((rand() % misc_intvl) + 5) 282 283 static void dotest(int testers, int me, int fd) 284 { 285 char *bits, *hold_bits; 286 char val; 287 int count, collide, chunk, whenmisc, xfr, i; 288 289 /* Stuff for the readv call */ 290 struct iovec r_iovec[MAXIOVCNT]; 291 int r_ioveclen; 292 293 /* Stuff for the writev call */ 294 struct iovec val_iovec[MAXIOVCNT]; 295 296 struct iovec zero_iovec[MAXIOVCNT]; 297 int w_ioveclen; 298 struct stat stat; 299 300 nchunks = max_size / csize; 301 whenmisc = 0; 302 303 if ((bits = malloc((nchunks + 7) / 8)) == NULL) { 304 tst_brkm(TBROK, NULL, "\tmalloc failed(bits)"); 305 } 306 if ((hold_bits = malloc((nchunks + 7) / 8)) == NULL) { 307 tst_brkm(TBROK, NULL, "\tmalloc failed(hlod_bits)"); 308 } 309 310 /*Allocate memory for the iovec buffers and init the iovec arrays 311 */ 312 r_ioveclen = w_ioveclen = csize / MAXIOVCNT; 313 314 /* Please note that the above statement implies that csize 315 * be evenly divisible by MAXIOVCNT. 316 */ 317 318 for (i = 0; i < MAXIOVCNT; i++) { 319 if ((r_iovec[i].iov_base = calloc(r_ioveclen, 1)) == NULL) { 320 tst_brkm(TFAIL, NULL, 321 "\tmalloc failed(r_iovec[i].iov_base)"); 322 } 323 r_iovec[i].iov_len = r_ioveclen; 324 325 /* Allocate unused memory areas between all the buffers to 326 * make things more diffult for the OS. 327 */ 328 329 if (malloc((i + 1) * 8) == NULL) { 330 tst_brkm(TBROK, NULL, "\tmalloc failed((i+1)*8)"); 331 } 332 if ((val_iovec[i].iov_base = calloc(w_ioveclen, 1)) == NULL) { 333 tst_resm(TBROK, "\tmalloc failed(val_iovec[i]"); 334 exit(1); 335 } 336 val_iovec[i].iov_len = w_ioveclen; 337 338 if (malloc((i + 1) * 8) == NULL) { 339 tst_brkm(TBROK, NULL, "\tmalloc failed((i+1)*8)"); 340 } 341 if ((zero_iovec[i].iov_base = calloc(w_ioveclen, 1)) == NULL) { 342 tst_brkm(TBROK, NULL, "\tmalloc failed(zero_iover)"); 343 } 344 zero_iovec[i].iov_len = w_ioveclen; 345 346 if (malloc((i + 1) * 8) == NULL) { 347 tst_brkm(TBROK, NULL, "\tmalloc failed((i+1)*8)"); 348 } 349 } 350 /* 351 * No init sectors; allow file to be sparse. 352 */ 353 val = (64 / testers) * me + 1; 354 355 /* 356 * For each iteration: 357 * zap bits array 358 * loop 359 * pick random chunk, read it. 360 * if corresponding bit off { 361 * verify = 0. (sparse file) 362 * ++count; 363 * } else 364 * verify = val. 365 * write "val" on it. 366 * repeat unitl count = nchunks. 367 * ++val. 368 */ 369 370 srand(getpid()); 371 if (misc_intvl) 372 whenmisc = NEXTMISC; 373 374 while (iterations-- > 0) { 375 for (i = 0; i < NMISC; i++) 376 misc_cnt[i] = 0; 377 ftruncate(fd, 0); 378 file_max = 0; 379 memset(bits, 0, (nchunks + 7) / 8); 380 memset(hold_bits, 0, (nchunks + 7) / 8); 381 382 /* Have to fill the val and zero iov buffers in a different manner 383 */ 384 for (i = 0; i < MAXIOVCNT; i++) { 385 memset(val_iovec[i].iov_base, val, 386 val_iovec[i].iov_len); 387 memset(zero_iovec[i].iov_base, 0, 388 zero_iovec[i].iov_len); 389 390 } 391 count = 0; 392 collide = 0; 393 while (count < nchunks) { 394 chunk = rand() % nchunks; 395 /* 396 * Read it. 397 */ 398 if (lseek64(fd, CHUNK(chunk), 0) < 0) { 399 tst_brkm(TFAIL, 400 NULL, 401 "\tTest[%d]: lseek64(0) fail at %Lx, errno = %d.", 402 me, CHUNK(chunk), errno); 403 } 404 if ((xfr = readv(fd, &r_iovec[0], MAXIOVCNT)) < 0) { 405 tst_brkm(TFAIL, 406 NULL, 407 "\tTest[%d]: readv fail at %Lx, errno = %d.", 408 me, CHUNK(chunk), errno); 409 } 410 /* 411 * If chunk beyond EOF just write on it. 412 * Else if bit off, haven't seen it yet. 413 * Else, have. Verify values. 414 */ 415 if (CHUNK(chunk) >= file_max) { 416 bits[chunk / 8] |= (1 << (chunk % 8)); 417 ++count; 418 } else if ((bits[chunk / 8] & (1 << (chunk % 8))) == 0) { 419 if (xfr != csize) { 420 tst_brkm(TFAIL, 421 NULL, 422 "\tTest[%d]: xfr=%d != %d, zero read.", 423 me, xfr, csize); 424 } 425 for (i = 0; i < MAXIOVCNT; i++) { 426 if (memcmp 427 (r_iovec[i].iov_base, 428 zero_iovec[i].iov_base, 429 r_iovec[i].iov_len)) { 430 tst_resm(TFAIL, 431 "\tTest[%d] bad verify @ 0x%Lx for val %d count %d xfr %d file_max 0x%llx, should be 0.", 432 me, CHUNK(chunk), val, 433 count, xfr, file_max); 434 tst_resm(TINFO, 435 "\tTest[%d]: last_trunc = 0x%x", 436 me, last_trunc); 437 fstat(fd, &stat); 438 tst_resm(TINFO, 439 "\tStat: size=%llx, ino=%x", 440 stat.st_size, (unsigned)stat.st_ino); 441 sync(); 442 ft_dumpiov(&r_iovec[i]); 443 ft_dumpbits(bits, 444 (nchunks + 7) / 8); 445 ft_orbits(hold_bits, bits, 446 (nchunks + 7) / 8); 447 tst_resm(TINFO, "\tHold "); 448 ft_dumpbits(hold_bits, 449 (nchunks + 7) / 8); 450 tst_exit(); 451 } 452 } 453 bits[chunk / 8] |= (1 << (chunk % 8)); 454 ++count; 455 } else { 456 if (xfr != csize) { 457 tst_brkm(TFAIL, 458 NULL, 459 "\tTest[%d]: xfr=%d != %d, val read.", 460 me, xfr, csize); 461 } 462 ++collide; 463 for (i = 0; i < MAXIOVCNT; i++) { 464 if (memcmp 465 (r_iovec[i].iov_base, 466 val_iovec[i].iov_base, 467 r_iovec[i].iov_len)) { 468 tst_resm(TFAIL, 469 "\tTest[%d] bad verify @ 0x%Lx for val %d count %d xfr %d file_max 0x%llx.", 470 me, CHUNK(chunk), val, 471 count, xfr, file_max); 472 tst_resm(TINFO, 473 "\tTest[%d]: last_trunc = 0x%x", 474 me, last_trunc); 475 fstat(fd, &stat); 476 tst_resm(TINFO, 477 "\tStat: size=%llx, ino=%x", 478 stat.st_size, (unsigned)stat.st_ino); 479 sync(); 480 ft_dumpiov(&r_iovec[i]); 481 ft_dumpbits(bits, 482 (nchunks + 7) / 8); 483 ft_orbits(hold_bits, bits, 484 (nchunks + 7) / 8); 485 tst_resm(TINFO, "\tHold "); 486 ft_dumpbits(hold_bits, 487 (nchunks + 7) / 8); 488 tst_exit(); 489 } 490 } 491 } 492 /* 493 * Writev it. 494 */ 495 if (lseek64(fd, -((off64_t) xfr), 1) < 0) { 496 tst_brkm(TFAIL, 497 NULL, 498 "\tTest[%d]: lseek64(1) fail at %Lx, errno = %d.", 499 me, CHUNK(chunk), errno); 500 } 501 if ((xfr = 502 writev(fd, &val_iovec[0], MAXIOVCNT)) < csize) { 503 if (errno == ENOSPC) { 504 tst_resm(TFAIL, 505 "\tTest[%d]: no space, exiting.", 506 me); 507 fsync(fd); 508 tst_exit(); 509 } 510 tst_brkm(TFAIL, 511 NULL, 512 "\tTest[%d]: writev fail at %Lx xfr %d, errno = %d.", 513 me, CHUNK(chunk), xfr, errno); 514 } 515 if (CHUNK(chunk) + csize > file_max) 516 file_max = CHUNK(chunk) + csize; 517 /* 518 * If hit "misc" interval, do it. 519 */ 520 if (misc_intvl && --whenmisc <= 0) { 521 ft_orbits(hold_bits, bits, (nchunks + 7) / 8); 522 domisc(me, fd, bits); 523 whenmisc = NEXTMISC; 524 } 525 if (count + collide > 2 * nchunks) 526 break; 527 } 528 529 /* 530 * End of iteration, maybe before doing all chunks. 531 */ 532 fsync(fd); 533 ++misc_cnt[m_fsync]; 534 //tst_resm(TINFO, "\tTest{%d} val %d done, count = %d, collide = {%d}", 535 // me, val, count, collide); 536 //for (i = 0; i < NMISC; i++) 537 // tst_resm(TINFO, "\t\tTest{%d}: {%d} %s's.", me, misc_cnt[i], m_str[i]); 538 ++val; 539 } 540 } 541 542 /* 543 * domisc() 544 * Inject misc syscalls into the thing. 545 */ 546 static void domisc(int me, int fd, char *bits) 547 { 548 int chunk; 549 struct stat sb; 550 551 if (type > m_fstat) 552 type = m_fsync; 553 switch (type) { 554 case m_fsync: 555 if (fsync(fd) < 0) { 556 tst_brkm(TFAIL, NULL, "\tTest[%d]: fsync error %d.", 557 me, 558 errno); 559 } 560 break; 561 case m_trunc: 562 chunk = rand() % (file_max / csize); 563 file_max = CHUNK(chunk); 564 last_trunc = file_max; 565 if (tr_flag) { 566 if (ftruncate(fd, file_max) < 0) { 567 tst_brkm(TFAIL, 568 NULL, 569 "\tTest[%d]: ftruncate error %d @ 0x%llx.", 570 me, errno, file_max); 571 } 572 tr_flag = 0; 573 } else { 574 if (truncate(test_name, file_max) < 0) { 575 tst_brkm(TFAIL, 576 NULL, 577 "\tTest[%d]: truncate error %d @ 0x%llx.", 578 me, errno, file_max); 579 } 580 tr_flag = 1; 581 } 582 for (; chunk % 8 != 0; chunk++) 583 bits[chunk / 8] &= ~(1 << (chunk % 8)); 584 for (; chunk < nchunks; chunk += 8) 585 bits[chunk / 8] = 0; 586 break; 587 case m_sync: 588 sync(); 589 break; 590 case m_fstat: 591 if (fstat(fd, &sb) < 0) { 592 tst_brkm(TFAIL, NULL, "\tTest[%d]: fstat() error %d.", 593 me, 594 errno); 595 } 596 if (sb.st_size != file_max) { 597 tst_brkm(TFAIL, 598 NULL, "\tTest[%d]: fstat() mismatch; st_size=%" 599 PRIx64 ",file_max=%llx.", me, 600 (int64_t) sb.st_size, file_max); 601 } 602 break; 603 } 604 605 ++misc_cnt[type]; 606 ++type; 607 } 608 609 /* term() 610 * 611 * This is called when a SIGTERM signal arrives. 612 */ 613 static void term(int sig LTP_ATTRIBUTE_UNUSED) 614 { 615 int i; 616 617 tst_resm(TINFO, "\tterm -[%d]- got sig term.", getpid()); 618 619 /* 620 * If run by hand we like to have the parent send the signal to 621 * the child processes. This makes life easy. 622 */ 623 if (parent_pid == getpid()) { 624 for (i = 0; i < nchild; i++) 625 if (pidlist[i]) 626 kill(pidlist[i], SIGTERM); 627 return; 628 } 629 630 tst_resm(TINFO, "\tunlinking '%s'", test_name); 631 632 close(fd); 633 if (unlink(test_name)) 634 tst_resm(TBROK, "Unlink of '%s' failed, errno = %d.", 635 test_name, errno); 636 else 637 tst_resm(TINFO, "Unlink of '%s' successful.", test_name); 638 639 tst_exit(); 640 } 641
