1 /* IBM Corporation */ 2 /* 01/02/2003 Port to LTP avenkat (at) us.ibm.com */ 3 /* 06/30/2001 Port to Linux nsharoff (at) us.ibm.com */ 4 /* 5 * Copyright (c) International Business Machines Corp., 2003 6 * 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 16 * the GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23 #define _GNU_SOURCE 1 24 #include <stdio.h> 25 #include <fcntl.h> 26 #include <signal.h> 27 #include <sys/mman.h> 28 #include <sys/wait.h> 29 #include <sys/stat.h> 30 #include <unistd.h> 31 #include <stdlib.h> 32 #include <errno.h> 33 #include <sys/types.h> 34 #include <limits.h> 35 /***** LTP Port *****/ 36 #include "test.h" 37 #define FAILED 0 38 #define PASSED 1 39 40 int local_flag = PASSED; 41 char *TCID = "mmapstress01"; //tmnoextend 42 FILE *temp; 43 int TST_TOTAL = 1; 44 45 int anyfail(); 46 void ok_exit(); 47 /***** ** ** *****/ 48 49 /* 50 * This test stresses mmaps, without dealing with fragments or anything! 51 * It forks a specified number of children, 52 * all of whom mmap the same file, make a given number of accesses 53 * to random pages in the map (reading & writing and comparing data). 54 * Then the child exits and the parent forks another to take its place. 55 * Each time a child is forked, it stats the file and maps the full 56 * length of the file. 57 * 58 * This program continues to run until it either receives a SIGINT, 59 * or times out (if a timeout value is specified). When either of 60 * these things happens, it cleans up its kids, then checks the 61 * file to make sure it has the correct data. 62 * 63 * usage: 64 * tmnoextend -p nprocs [-t minutes -f filesize -S sparseoffset 65 * -r -o -m -l -d] 66 * where: 67 * -p nprocs - specifies the number of mapping children 68 * to create. (nprocs + 1 children actually 69 * get created, since one is the writer child) 70 * -t minutes - specifies minutes to run. If not specified, 71 * default is to run forever until a SIGINT 72 * is received. 73 * -f filesize - initial filesize (defaults to FILESIZE) 74 * -S sparseoffset - when non-zero, causes a sparse area to 75 * be left before the data, meaning that the 76 * actual initial file size is sparseoffset + 77 * filesize. Useful for testing large files. 78 * (default is 0). 79 * -r - randomize number of pages map children check. 80 * (random % MAXLOOPS). If not specified, each 81 * child checks MAXLOOPS pages. 82 * -o - randomize offset of file to map. (default is 0) 83 * -m - do random msync/fsyncs as well 84 * -l - if set, the output file is not removed on 85 * program exit. 86 * -d - enable debug output 87 * 88 * Compile with -DLARGE_FILE to enable file sizes > 2 GB. 89 */ 90 91 #define MAXLOOPS 500 /* max pages for map children to write */ 92 #define FILESIZE 4096 /* initial filesize set up by parent */ 93 94 #ifdef roundup 95 #undef roundup 96 #endif 97 #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) 98 #define min(x, y) (((x) < (y)) ? (x) : (y)) 99 100 extern time_t time(time_t *); 101 extern char *ctime(const time_t *); 102 extern void *malloc(size_t); 103 extern long lrand48(void); 104 extern void srand(unsigned); 105 extern void srand48(long); 106 extern int rand(void); 107 extern int atoi(const char *); 108 109 char *usage = 110 "-p nprocs [-t minutes -f filesize -S sparseoffset -r -o -m -l -d]"; 111 112 typedef unsigned char uchar_t; 113 #define SIZE_MAX UINT_MAX 114 115 unsigned int initrand(void); 116 void finish(int sig); 117 void child_mapper(char *file, unsigned procno, unsigned nprocs); 118 int fileokay(char *file, uchar_t * expbuf); 119 int finished = 0; 120 int leavefile = 0; 121 122 int debug = 0; 123 #ifdef LARGE_FILE 124 off64_t filesize = FILESIZE; 125 off64_t sparseoffset = 0; 126 #else /* LARGE_FILE */ 127 off_t filesize = FILESIZE; 128 off_t sparseoffset = 0; 129 #endif /* LARGE_FILE */ 130 unsigned randloops = 0; 131 unsigned dosync = 0; 132 unsigned do_offset = 0; 133 unsigned pattern = 0; 134 135 int main(int argc, char *argv[]) 136 { 137 char *progname; 138 int fd; 139 int c; 140 extern char *optarg; 141 unsigned nprocs = 0; 142 unsigned procno; 143 pid_t *pidarray = NULL; 144 pid_t pid; 145 uchar_t *buf = NULL; 146 unsigned int seed; 147 int pagesize = sysconf(_SC_PAGE_SIZE); 148 float alarmtime = 0; 149 struct sigaction sa; 150 unsigned i; 151 int write_cnt; 152 uchar_t data; 153 int no_prob = 0; 154 int wait_stat; 155 time_t t; 156 #ifdef LARGE_FILE 157 off64_t bytes_left; 158 #else /* LARGE_FILE */ 159 off_t bytes_left; 160 #endif /* LARGE_FILE */ 161 const char *filename = "mmapstress01.out"; 162 163 progname = *argv; 164 tst_tmpdir(); 165 if (argc < 2) { 166 tst_brkm(TBROK, NULL, "usage: %s %s\n", progname, usage); 167 } 168 169 while ((c = getopt(argc, argv, "S:omdlrf:p:t:")) != -1) { 170 switch (c) { 171 case 'd': 172 debug = 1; 173 break; 174 case 't': 175 alarmtime = atof(optarg) * 60; 176 break; 177 case 'p': 178 nprocs = atoi(optarg); 179 break; 180 case 'l': 181 leavefile = 1; 182 break; 183 case 'f': 184 #ifdef LARGE_FILE 185 filesize = atoll(optarg); 186 #else /* LARGE_FILE */ 187 filesize = atoi(optarg); 188 #endif /* LARGE_FILE */ 189 if (filesize < 0) { 190 (void)fprintf(stderr, "error: negative " 191 "filesize\n"); 192 anyfail(); 193 } 194 break; 195 case 'r': 196 randloops = 1; 197 break; 198 case 'm': 199 dosync = 1; 200 break; 201 case 'o': 202 do_offset = 1; 203 break; 204 case 'S': 205 #ifdef LARGE_FILE 206 sparseoffset = atoll(optarg); 207 #else /* LARGE_FILE */ 208 sparseoffset = atoi(optarg); 209 #endif /* LARGE_FILE */ 210 if (sparseoffset % pagesize != 0) { 211 fprintf(stderr, 212 "sparseoffset must be pagesize multiple\n"); 213 anyfail(); 214 } 215 break; 216 default: 217 (void)fprintf(stderr, "usage: %s %s\n", progname, 218 usage); 219 tst_exit(); 220 } 221 } 222 223 /* nprocs is >= 0 since it's unsigned */ 224 if (nprocs > 255) { 225 (void)fprintf(stderr, "invalid nprocs %d - (range 0-255)\n", 226 nprocs); 227 anyfail(); 228 } 229 230 (void)time(&t); 231 232 seed = initrand(); 233 pattern = seed & 0xff; 234 235 if (debug) { 236 #ifdef LARGE_FILE 237 (void)printf("creating file <%s> with %Ld bytes, pattern %d\n", 238 filename, filesize, pattern); 239 #else /* LARGE_FILE */ 240 (void)printf("creating file <%s> with %ld bytes, pattern %d\n", 241 filename, filesize, pattern); 242 #endif /* LARGE_FILE */ 243 if (alarmtime) 244 (void)printf("running for %f minutes\n", 245 alarmtime / 60); 246 else 247 (void)printf("running with no time limit\n"); 248 } 249 250 /* 251 * Plan for death by signal. User may have specified 252 * a time limit, in which set an alarm and catch SIGALRM. 253 * Also catch and cleanup with SIGINT. 254 */ 255 sa.sa_handler = finish; 256 sa.sa_flags = 0; 257 if (sigemptyset(&sa.sa_mask)) { 258 perror("sigemptyset error"); 259 goto cleanup; 260 } 261 262 if (sigaction(SIGINT, &sa, 0) == -1) { 263 perror("sigaction error SIGINT"); 264 goto cleanup; 265 } 266 if (sigaction(SIGQUIT, &sa, 0) == -1) { 267 perror("sigaction error SIGQUIT"); 268 goto cleanup; 269 } 270 if (sigaction(SIGTERM, &sa, 0) == -1) { 271 perror("sigaction error SIGTERM"); 272 goto cleanup; 273 } 274 275 if (alarmtime) { 276 if (sigaction(SIGALRM, &sa, 0) == -1) { 277 perror("sigaction error"); 278 goto cleanup; 279 } 280 (void)alarm(alarmtime); 281 } 282 #ifdef LARGE_FILE 283 if ((fd = open64(filename, O_CREAT | O_TRUNC | O_RDWR, 0664)) == -1) { 284 #else /* LARGE_FILE */ 285 if ((fd = open(filename, O_CREAT | O_TRUNC | O_RDWR, 0664)) == -1) { 286 #endif /* LARGE_FILE */ 287 perror("open error"); 288 anyfail(); 289 } 290 291 if ((buf = malloc(pagesize)) == NULL 292 || (pidarray = malloc(nprocs * sizeof(pid_t))) == NULL) { 293 perror("malloc error"); 294 anyfail(); 295 } 296 297 for (i = 0; i < nprocs; i++) 298 *(pidarray + i) = 0; 299 300 for (i = 0, data = 0; i < pagesize; i++) { 301 *(buf + i) = (data + pattern) & 0xff; 302 if (++data == nprocs) 303 data = 0; 304 } 305 #ifdef LARGE_FILE 306 if (lseek64(fd, sparseoffset, SEEK_SET) < 0) { 307 #else /* LARGE_FILE */ 308 if (lseek(fd, sparseoffset, SEEK_SET) < 0) { 309 #endif /* LARGE_FILE */ 310 perror("lseek"); 311 anyfail(); 312 } 313 for (bytes_left = filesize; bytes_left; bytes_left -= c) { 314 write_cnt = min(pagesize, bytes_left); 315 if ((c = write(fd, buf, write_cnt)) != write_cnt) { 316 if (c == -1) { 317 perror("write error"); 318 } else { 319 (void)fprintf(stderr, "write: wrote %d of %d " 320 "bytes\n", c, write_cnt); 321 } 322 (void)close(fd); 323 (void)unlink(filename); 324 anyfail(); 325 } 326 } 327 328 (void)close(fd); 329 330 /* 331 * Fork off mmap children. 332 */ 333 for (procno = 0; procno < nprocs; procno++) { 334 switch (pid = fork()) { 335 336 case -1: 337 perror("fork error"); 338 goto cleanup; 339 340 case 0: 341 child_mapper(filename, procno, nprocs); 342 exit(0); 343 344 default: 345 pidarray[procno] = pid; 346 } 347 } 348 349 /* 350 * Now wait for children and refork them as needed. 351 */ 352 353 while (!finished) { 354 pid = wait(&wait_stat); 355 /* 356 * Block signals while processing child exit. 357 */ 358 359 if (sighold(SIGALRM) || sighold(SIGINT)) { 360 perror("sighold error"); 361 goto cleanup; 362 } 363 364 if (pid != -1) { 365 /* 366 * Check exit status, then refork with the 367 * appropriate procno. 368 */ 369 if (!WIFEXITED(wait_stat) 370 || WEXITSTATUS(wait_stat) != 0) { 371 (void)fprintf(stderr, "child exit with err " 372 "<x%x>\n", wait_stat); 373 goto cleanup; 374 } 375 for (i = 0; i < nprocs; i++) 376 if (pid == pidarray[i]) 377 break; 378 if (i == nprocs) { 379 (void)fprintf(stderr, "unknown child pid %d, " 380 "<x%x>\n", pid, wait_stat); 381 goto cleanup; 382 } 383 384 if ((pid = fork()) == -1) { 385 perror("fork error"); 386 pidarray[i] = 0; 387 goto cleanup; 388 } else if (pid == 0) { /* child */ 389 child_mapper(filename, i, nprocs); 390 exit(0); 391 } else 392 pidarray[i] = pid; 393 } else { 394 /* 395 * wait returned an error. If EINTR, then 396 * normal finish, else it's an unexpected 397 * error... 398 */ 399 if (errno != EINTR || !finished) { 400 perror("unexpected wait error"); 401 goto cleanup; 402 } 403 } 404 if (sigrelse(SIGALRM) || sigrelse(SIGINT)) { 405 perror("sigrelse error"); 406 goto cleanup; 407 } 408 } 409 410 /* 411 * Finished! Check the file for sanity, then kill all 412 * the children and done!. 413 */ 414 415 if (sighold(SIGALRM)) { 416 perror("sighold error"); 417 goto cleanup; 418 } 419 (void)alarm(0); 420 no_prob = 1; 421 422 cleanup: 423 for (i = 0; i < nprocs; i++) 424 (void)kill(pidarray[i], SIGKILL); 425 426 while (wait(&wait_stat) != -1 || errno != ECHILD) 427 continue; 428 429 if (no_prob) { /* only check file if no errors */ 430 if (!fileokay(filename, buf)) { 431 (void)fprintf(stderr, "file data incorrect!\n"); 432 (void)printf(" leaving file <%s>\n", filename); 433 /***** LTP Port *****/ 434 local_flag = FAILED; 435 anyfail(); 436 /***** ** *****/ 437 } else { 438 (void)printf("file data okay\n"); 439 if (!leavefile) 440 (void)unlink(filename); 441 } 442 } else 443 (void)printf(" leaving file <%s>\n", filename); 444 445 (void)time(&t); 446 //(void)printf("%s: Finished %s", argv[0], ctime(&t)); LTP Port 447 ok_exit(); 448 tst_exit(); 449 } 450 451 /* 452 * Child process that reads/writes map. The child stats the file 453 * to determine the size, maps the size of the file, then reads/writes 454 * its own locations on random pages of the map (its locations being 455 * determined based on nprocs & procno). After a specific number of 456 * iterations, it exits. 457 */ 458 void child_mapper(char *file, unsigned procno, unsigned nprocs) 459 { 460 #ifdef LARGE_FILE 461 struct stat64 statbuf; 462 off64_t filesize; 463 off64_t offset; 464 #else /* LARGE_FILE */ 465 struct stat statbuf; 466 off_t filesize; 467 off_t offset; 468 #endif /* LARGE_FILE */ 469 size_t validsize; 470 size_t mapsize; 471 char *maddr = NULL, *paddr; 472 int fd; 473 size_t pagesize = sysconf(_SC_PAGE_SIZE); 474 unsigned randpage; 475 unsigned int seed; 476 unsigned loopcnt; 477 unsigned nloops; 478 unsigned mappages; 479 unsigned i; 480 481 seed = initrand(); /* initialize random seed */ 482 483 #ifdef LARGE_FILE 484 if (stat64(file, &statbuf) == -1) { 485 #else /* LARGE_FILE */ 486 if (stat(file, &statbuf) == -1) { 487 #endif /* LARGE_FILE */ 488 perror("stat error"); 489 anyfail(); 490 } 491 filesize = statbuf.st_size; 492 493 #ifdef LARGE_FILE 494 if ((fd = open64(file, O_RDWR)) == -1) { 495 #else /* LARGE_FILE */ 496 if ((fd = open(file, O_RDWR)) == -1) { 497 #endif /* LARGE_FILE */ 498 perror("open error"); 499 anyfail(); 500 } 501 502 if (statbuf.st_size - sparseoffset > SIZE_MAX) { 503 fprintf(stderr, "size_t overflow when setting up map\n"); 504 anyfail(); 505 } 506 mapsize = (size_t) (statbuf.st_size - sparseoffset); 507 mappages = roundup(mapsize, pagesize) / pagesize; 508 offset = sparseoffset; 509 if (do_offset) { 510 int pageoffset = lrand48() % mappages; 511 int byteoffset = pageoffset * pagesize; 512 offset += byteoffset; 513 mapsize -= byteoffset; 514 mappages -= pageoffset; 515 } 516 nloops = (randloops) ? (lrand48() % MAXLOOPS) : MAXLOOPS; 517 518 if (debug) { 519 #ifdef LARGE_FILE 520 (void)printf("child %d (pid %ld): seed %d, fsize %Ld, " 521 "mapsize %d, off %Ld, loop %d\n", 522 procno, getpid(), seed, filesize, mapsize, 523 offset / pagesize, nloops); 524 #else /* LARGE_FILE */ 525 (void)printf("child %d (pid %d): seed %d, fsize %ld, " 526 "mapsize %ld, off %ld, loop %d\n", 527 procno, getpid(), seed, filesize, (long)mapsize, 528 offset / pagesize, nloops); 529 #endif /* LARGE_FILE */ 530 } 531 #ifdef LARGE_FILE 532 if ((maddr = mmap64(0, mapsize, PROT_READ | PROT_WRITE, MAP_SHARED, 533 fd, offset)) == (caddr_t) - 1) { 534 #else /* LARGE_FILE */ 535 if ((maddr = mmap(0, mapsize, PROT_READ | PROT_WRITE, MAP_SHARED, 536 fd, offset)) == (caddr_t) - 1) { 537 #endif /* LARGE_FILE */ 538 perror("mmap error"); 539 anyfail(); 540 } 541 542 (void)close(fd); 543 544 /* 545 * Now loop read/writing random pages. 546 */ 547 for (loopcnt = 0; loopcnt < nloops; loopcnt++) { 548 randpage = lrand48() % mappages; 549 paddr = maddr + (randpage * pagesize); /* page address */ 550 551 if (randpage < mappages - 1 || !(mapsize % pagesize)) 552 validsize = pagesize; 553 else 554 validsize = mapsize % pagesize; 555 556 for (i = procno; i < validsize; i += nprocs) { 557 if (*((unsigned char *)(paddr + i)) 558 != ((procno + pattern) & 0xff)) { 559 (void)fprintf(stderr, "child %d: invalid data " 560 "<x%x>", procno, 561 *((unsigned char *)(paddr + i))); 562 (void)fprintf(stderr, " at pg %d off %d, exp " 563 "<x%x>\n", randpage, i, 564 (procno + pattern) & 0xff); 565 anyfail(); 566 } 567 568 /* 569 * Now write it. 570 */ 571 *(paddr + i) = (procno + pattern) & 0xff; 572 } 573 } 574 if (dosync) { 575 /* 576 * Exercise msync() as well! 577 */ 578 randpage = lrand48() % mappages; 579 paddr = maddr + (randpage * pagesize); /* page address */ 580 if (msync(paddr, (mappages - randpage) * pagesize, 581 MS_SYNC) == -1) { 582 anyfail(); 583 } 584 } 585 if (munmap(maddr, mapsize) == -1) { 586 perror("munmap failed"); 587 local_flag = FAILED; 588 anyfail(); 589 } 590 exit(0); 591 } 592 593 /* 594 * Make sure file has all the correct data. 595 */ 596 int fileokay(char *file, uchar_t * expbuf) 597 { 598 #ifdef LARGE_FILE 599 struct stat64 statbuf; 600 #else /* LARGE_FILE */ 601 struct stat statbuf; 602 #endif /* LARGE_FILE */ 603 size_t mapsize; 604 unsigned mappages; 605 unsigned pagesize = sysconf(_SC_PAGE_SIZE); 606 uchar_t readbuf[pagesize]; 607 int fd; 608 int cnt; 609 unsigned i, j; 610 611 #ifdef LARGE_FILE 612 if ((fd = open64(file, O_RDONLY)) == -1) { 613 #else /* LARGE_FILE */ 614 if ((fd = open(file, O_RDONLY)) == -1) { 615 #endif /* LARGE_FILE */ 616 perror("open error"); 617 /***** LTP Port *****/ 618 local_flag = FAILED; 619 anyfail(); 620 /***** ** *****/ 621 return 0; 622 } 623 #ifdef LARGE_FILE 624 if (fstat64(fd, &statbuf) == -1) { 625 #else /* LARGE_FILE */ 626 if (fstat(fd, &statbuf) == -1) { 627 #endif /* LARGE_FILE */ 628 perror("stat error"); 629 /***** LTP Port *****/ 630 local_flag = FAILED; 631 anyfail(); 632 /***** ** *****/ 633 return 0; 634 } 635 #ifdef LARGE_FILE 636 if (lseek64(fd, sparseoffset, SEEK_SET) < 0) { 637 #else /* LARGE_FILE */ 638 if (lseek(fd, sparseoffset, SEEK_SET) < 0) { 639 #endif /* LARGE_FILE */ 640 perror("lseek"); 641 anyfail(); 642 } 643 644 if (statbuf.st_size - sparseoffset > SIZE_MAX) { 645 fprintf(stderr, "size_t overflow when setting up map\n"); 646 anyfail(); 647 } 648 mapsize = (size_t) (statbuf.st_size - sparseoffset); 649 650 mappages = roundup(mapsize, pagesize) / pagesize; 651 652 for (i = 0; i < mappages; i++) { 653 cnt = read(fd, readbuf, pagesize); 654 if (cnt == -1) { 655 perror("read error"); 656 /***** LTP Port *****/ 657 local_flag = FAILED; 658 anyfail(); 659 /***** ** *****/ 660 return 0; 661 } else if (cnt != pagesize) { 662 /* 663 * Okay if at last page in file... 664 */ 665 if ((i * pagesize) + cnt != mapsize) { 666 (void)fprintf(stderr, "read %d of %ld bytes\n", 667 (i * pagesize) + cnt, 668 (long)mapsize); 669 close(fd); 670 return 0; 671 } 672 } 673 /* 674 * Compare read bytes of data. 675 */ 676 for (j = 0; j < cnt; j++) { 677 if (expbuf[j] != readbuf[j]) { 678 (void)fprintf(stderr, 679 "read bad data: exp %c got %c)", 680 expbuf[j], readbuf[j]); 681 #ifdef LARGE_FILE 682 (void)fprintf(stderr, ", pg %d off %d, " 683 "(fsize %Ld)\n", i, j, 684 statbuf.st_size); 685 #else /* LARGE_FILE */ 686 (void)fprintf(stderr, ", pg %d off %d, " 687 "(fsize %ld)\n", i, j, 688 statbuf.st_size); 689 #endif /* LARGE_FILE */ 690 close(fd); 691 return 0; 692 } 693 } 694 } 695 close(fd); 696 697 return 1; 698 } 699 700 /*ARGSUSED*/ void finish(int sig) 701 { 702 finished++; 703 return; 704 } 705 706 unsigned int initrand(void) 707 { 708 unsigned int seed; 709 710 /* 711 * Initialize random seed... Got this from a test written 712 * by scooter: 713 * Use srand/rand to diffuse the information from the 714 * time and pid. If you start several processes, then 715 * the time and pid information don't provide much 716 * variation. 717 */ 718 srand((unsigned int)getpid()); 719 seed = rand(); 720 srand((unsigned int)time(NULL)); 721 seed = (seed ^ rand()) % 100000; 722 srand48((long int)seed); 723 return (seed); 724 } 725 726 /***** LTP Port *****/ 727 void ok_exit(void) 728 { 729 tst_resm(TPASS, "Test passed"); 730 tst_rmdir(); 731 tst_exit(); 732 } 733 734 int anyfail(void) 735 { 736 tst_brkm(TFAIL, tst_rmdir, "Test failed"); 737 } 738 739 /***** ** ** *****/ 740