lustre/tests/fsx.c

   1 /*
   2  * Copyright (c) 1998-2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * Copyright (c) 2012, Intel Corporation.
   5  *
   6  * @APPLE_LICENSE_HEADER_START@
   7  *
   8  * The contents of this file constitute Original Code as defined in and
   9  * are subject to the Apple Public Source License Version 1.1 (the
  10  * "License").  You may not use this file except in compliance with the
  11  * License.  Please obtain a copy of the License at
  12  * http://www.apple.com/publicsource and read it before using this file.
  13  *
  14  * This Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  *
  24  *      File:   fsx.c
  25  *      Author: Avadis Tevanian, Jr.
  26  *
  27  *      File system exerciser.
  28  *
  29  *      Rewrite and enhancements 1998-2001 Conrad Minshall -- conrad@mac.com
  30  *
  31  *      Various features from Joe Sokol, Pat Dirks, and Clark Warner.
  32  *
  33  *      Small changes to work under Linux -- davej@suse.de
  34  *
  35  *      Sundry porting patches from Guy Harris 12/2001
  36  * $FreeBSD: src/tools/regression/fsx/fsx.c,v 1.1 2001/12/20 04:15:57 jkh Exp $
  37  */
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #if defined(_UWIN) || defined(__linux__)
  41 # include <sys/param.h>
  42 # include <limits.h>
  43 # include <time.h>
  44 # include <strings.h>
  45 # include <sys/time.h>
  46 #endif
  47 #include <fcntl.h>
  48 #include <sys/mman.h>
  49 #ifndef MAP_FILE
  50 # define MAP_FILE 0
  51 #endif
  52 #include <limits.h>
  53 #include <signal.h>
  54 #include <stdio.h>
  55 #include <stdlib.h>
  56 #include <string.h>
  57 #include <unistd.h>
  58 #include <stdarg.h>
  59 #include <errno.h>
  60
  61 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  62
  63 /*
  64  * Each test run will work with one or more separate file descriptors for the
  65  * same file.  This allows testing cache coherency across multiple mountpoints
  66  * of the same network filesystem on a single client.
  67  */
  68 struct test_file {
  69         char *path;
  70         int fd;
  71 } *test_files = NULL;
  72
  73 int num_test_files;
  74 enum fd_iteration_policy {
  75         FD_SINGLE,
  76         FD_ROTATE,
  77         FD_RANDOM,
  78 };
  79 int fd_policy = FD_RANDOM;
  80 int fd_last;
  81
  82 /*
  83  *      A log entry is an operation and a bunch of arguments.
  84  */
  85
  86 struct log_entry {
  87         int                     operation;
  88         int                     args[3];
  89         struct timeval          tv;
  90         const struct test_file  *tf;
  91 };
  92
  93 #define LOGSIZE 100000
  94
  95 struct log_entry        oplog[LOGSIZE]; /* the log */
  96 int                     logptr = 0;     /* current position in log */
  97 int                     logcount = 0;   /* total ops */
  98
  99 /*
 100  *      Define operations
 101  */
 102
 103 #define OP_READ         1
 104 #define OP_WRITE        2
 105 #define OP_TRUNCATE     3
 106 #define OP_CLOSEOPEN    4
 107 #define OP_MAPREAD      5
 108 #define OP_MAPWRITE     6
 109 #define OP_SKIPPED      7
 110
 111 int page_size;
 112 int page_mask;
 113
 114 char    *original_buf;                  /* a pointer to the original data */
 115 char    *good_buf;                      /* a pointer to the correct data */
 116 char    *temp_buf;                      /* a pointer to the current data */
 117 char    *fname;                         /* name of our test file */
 118 char    logfile[PATH_MAX];              /* name of our log file */
 119 char    goodfile[PATH_MAX];             /* name of our test file */
 120
 121 off_t           file_size = 0;
 122 off_t           biggest = 0;
 123 char            state[256];
 124 unsigned long   testcalls = 0;          /* calls to function "test" */
 125
 126 long    simulatedopcount = 0;           /* -b flag */
 127 int     closeprob = 0;                  /* -c flag */
 128 int     debug = 0;                      /* -d flag */
 129 long    debugstart = 0;                 /* -D flag */
 130 long    maxfilelen = 256 * 1024;        /* -l flag */
 131 int     sizechecks = 1;                 /* -n flag disables them */
 132 int     maxoplen = 64 * 1024;           /* -o flag */
 133 int     quiet = 0;                      /* -q flag */
 134 long    progressinterval = 0;           /* -p flag */
 135 int     readbdy = 1;                    /* -r flag */
 136 int     style = 0;                      /* -s flag */
 137 int     truncbdy = 1;                   /* -t flag */
 138 int     writebdy = 1;                   /* -w flag */
 139 long    monitorstart = -1;              /* -m flag */
 140 long    monitorend = -1;                /* -m flag */
 141 int     lite = 0;                       /* -L flag */
 142 long    numops = -1;                    /* -N flag */
 143 int     randomoplen = 1;                /* -O flag disables it */
 144 int     seed = 1;                       /* -S flag */
 145 int     mapped_writes = 1;              /* -W flag disables */
 146 int     mapped_reads = 1;               /* -R flag disables it */
 147 int     fsxgoodfd = 0;
 148 int     o_direct;                       /* -Z */
 149 FILE *  fsxlogf = NULL;
 150 int badoff = -1;
 151
 152 void
 153 vwarnc(code, fmt, ap)
 154         int code;
 155         const char *fmt;
 156         va_list ap;
 157 {
 158         fprintf(stderr, "fsx: ");
 159         if (fmt != NULL) {
 160                 vfprintf(stderr, fmt, ap);
 161                 fprintf(stderr, ": ");
 162         }
 163         fprintf(stderr, "%s\n", strerror(code));
 164 }
 165
 166
 167 void
 168 warn(const char * fmt, ...)
 169 {
 170         va_list ap;
 171         va_start(ap, fmt);
 172         vwarnc(errno, fmt, ap);
 173         va_end(ap);
 174 }
 175
 176
 177 void
 178 __attribute__((format(printf, 1, 2)))
 179 prt(char *fmt, ...)
 180 {
 181         va_list args;
 182
 183         va_start(args, fmt);
 184         vfprintf(stdout, fmt, args);
 185         va_end(args);
 186
 187         if (fsxlogf) {
 188                 va_start(args, fmt);
 189                 vfprintf(fsxlogf, fmt, args);
 190                 va_end(args);
 191         }
 192 }
 193
 194 void
 195 prterr(char *prefix)
 196 {
 197         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 198 }
 199
 200
 201 void
 202 log4(int operation, int arg0, int arg1, int arg2, struct timeval *tv,
 203         const struct test_file *tf)
 204 {
 205         struct log_entry *le;
 206
 207         le = &oplog[logptr];
 208         le->operation = operation;
 209         le->args[0] = arg0;
 210         le->args[1] = arg1;
 211         le->args[2] = arg2;
 212         le->tv = *tv;
 213         le->tf = tf;
 214         logptr++;
 215         logcount++;
 216         if (logptr >= LOGSIZE)
 217                 logptr = 0;
 218 }
 219
 220 const char *
 221 fill_tf_buf(const struct test_file *tf)
 222 {
 223         static int max_tf_len;
 224         static char tf_buf[32];
 225
 226         if (fd_policy == FD_SINGLE)
 227                 return "";
 228
 229         if (max_tf_len == 0)
 230                 max_tf_len = snprintf(tf_buf, sizeof(tf_buf) - 1,
 231                                       "%u", num_test_files - 1);
 232
 233         sprintf(tf_buf, "[%0*lu]", max_tf_len,
 234                 (unsigned long)(tf - test_files));
 235
 236         return tf_buf;
 237 }
 238
 239 void
 240 logdump(void)
 241 {
 242         int     i, count, down;
 243         struct log_entry        *lp;
 244
 245         prt("LOG DUMP (%d total operations):\n", logcount);
 246         if (logcount < LOGSIZE) {
 247                 i = 0;
 248                 count = logcount;
 249         } else {
 250                 i = logptr;
 251                 count = LOGSIZE;
 252         }
 253         for ( ; count > 0; count--) {
 254                 int opnum;
 255
 256                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 257                 lp = &oplog[i];
 258                 prt("%d%s: %lu.%06lu ", opnum, fill_tf_buf(lp->tf),
 259                     lp->tv.tv_sec, lp->tv.tv_usec);
 260
 261                 switch (lp->operation) {
 262                 case OP_MAPREAD:
 263                         prt("MAPREAD  0x%x thru 0x%x (0x%x bytes)",
 264                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 265                             lp->args[1]);
 266                         if (badoff >= lp->args[0] && badoff <
 267                                                      lp->args[0] + lp->args[1])
 268                                 prt("\t***RRRR***");
 269                         break;
 270                 case OP_MAPWRITE:
 271                         prt("MAPWRITE 0x%x thru 0x%x (0x%x bytes)",
 272                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 273                             lp->args[1]);
 274                         if (badoff >= lp->args[0] && badoff <
 275                                                      lp->args[0] + lp->args[1])
 276                                 prt("\t******WWWW");
 277                         break;
 278                 case OP_READ:
 279                         prt("READ     0x%x thru 0x%x (0x%x bytes)",
 280                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 281                             lp->args[1]);
 282                         if (badoff >= lp->args[0] &&
 283                             badoff < lp->args[0] + lp->args[1])
 284                                 prt("\t***RRRR***");
 285                         break;
 286                 case OP_WRITE:
 287                         prt("WRITE    0x%x thru 0x%x (0x%x bytes)",
 288                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 289                             lp->args[1]);
 290                         if (lp->args[0] > lp->args[2])
 291                                 prt(" HOLE");
 292                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 293                                 prt(" EXTEND");
 294                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
 295                             badoff < lp->args[0] + lp->args[1])
 296                                 prt("\t***WWWW");
 297                         break;
 298                 case OP_TRUNCATE:
 299                         down = lp->args[0] < lp->args[1];
 300                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 301                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
 302                         if (badoff >= lp->args[!down] &&
 303                             badoff < lp->args[!!down])
 304                                 prt("\t******WWWW");
 305                         break;
 306                 case OP_CLOSEOPEN:
 307                         prt("CLOSE/OPEN");
 308                         break;
 309                 case OP_SKIPPED:
 310                         prt("SKIPPED (no operation)");
 311                         break;
 312                 default:
 313                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 314                             lp->operation);
 315                 }
 316                 prt("\n");
 317                 i++;
 318                 if (i == LOGSIZE)
 319                         i = 0;
 320         }
 321 }
 322
 323
 324 void
 325 save_buffer(char *buffer, off_t bufferlength, int fd)
 326 {
 327         off_t ret;
 328         ssize_t byteswritten;
 329
 330         if (fd <= 0 || bufferlength == 0)
 331                 return;
 332
 333         if (bufferlength > SSIZE_MAX) {
 334                 prt("fsx flaw: overflow in save_buffer\n");
 335                 exit(67);
 336         }
 337         if (lite) {
 338                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 339                 if (size_by_seek == (off_t)-1)
 340                         prterr("save_buffer: lseek eof");
 341                 else if (bufferlength > size_by_seek) {
 342                         warn("save_buffer: .fsxgood file too short... will"
 343                                 "save 0x%llx bytes instead of 0x%llx\n",
 344                                 (unsigned long long)size_by_seek,
 345                                 (unsigned long long)bufferlength);
 346                         bufferlength = size_by_seek;
 347                 }
 348         }
 349
 350         ret = lseek(fd, (off_t)0, SEEK_SET);
 351         if (ret == (off_t)-1)
 352                 prterr("save_buffer: lseek 0");
 353
 354         byteswritten = write(fd, buffer, (size_t)bufferlength);
 355         if (byteswritten != bufferlength) {
 356                 if (byteswritten == -1)
 357                         prterr("save_buffer write");
 358                 else
 359                         warn("save_buffer: short write, 0x%x bytes instead"
 360                                 "of 0x%llx\n",
 361                              (unsigned)byteswritten,
 362                              (unsigned long long)bufferlength);
 363         }
 364 }
 365
 366
 367 void
 368 report_failure(int status)
 369 {
 370         logdump();
 371
 372         if (fsxgoodfd) {
 373                 if (good_buf) {
 374                         save_buffer(good_buf, file_size, fsxgoodfd);
 375                         prt("Correct content saved for comparison\n");
 376                         prt("(maybe hexdump \"%s\" vs \"%s\")\n",
 377                             fname, goodfile);
 378                 }
 379                 close(fsxgoodfd);
 380         }
 381         exit(status);
 382 }
 383
 384
 385 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 386                                         *(((unsigned char *)(cp)) + 1)))
 387
 388 void
 389 check_buffers(unsigned offset, unsigned size)
 390 {
 391         unsigned char c, t;
 392         unsigned i = 0;
 393         unsigned n = 0;
 394         unsigned op = 0;
 395         unsigned bad = 0;
 396
 397         if (memcmp(good_buf + offset, temp_buf, size) != 0) {
 398                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
 399                     offset, size);
 400                 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
 401                 while (size > 0) {
 402                         c = good_buf[offset];
 403                         t = temp_buf[i];
 404                         if (c != t) {
 405                                 if (n == 0) {
 406                                         bad = short_at(&temp_buf[i]);
 407                                         prt("%#07x\t%#06x\t%#06x", offset,
 408                                             short_at(&good_buf[offset]), bad);
 409                                         op = temp_buf[offset & 1 ? i+1 : i];
 410                                 }
 411                                 n++;
 412                                 badoff = offset;
 413                         }
 414                         offset++;
 415                         i++;
 416                         size--;
 417                 }
 418                 if (n) {
 419                         prt("\t%#7x\n", n);
 420                         if (bad)
 421                                 prt("operation# (mod 256) for the bad data"
 422                                         "may be %u\n", ((unsigned)op & 0xff));
 423                         else
 424                                 prt("operation# (mod 256) for the bad data"
 425                                         "unknown, check HOLE and EXTEND ops\n");
 426                 } else
 427                         prt("????????????????\n");
 428                 report_failure(110);
 429         }
 430 }
 431
 432 struct test_file *
 433 get_tf(void)
 434 {
 435         unsigned index = 0;
 436
 437         switch (fd_policy) {
 438                 case FD_ROTATE:
 439                         index = fd_last++;
 440                         break;
 441                 case FD_RANDOM:
 442                         index = random();
 443                         break;
 444                 case FD_SINGLE:
 445                         index = 0;
 446                         break;
 447                 default:
 448                         prt("unknown policy");
 449                         exit(1);
 450                         break;
 451         }
 452         return &test_files[ index % num_test_files ];
 453 }
 454
 455 void
 456 assign_fd_policy(char *policy)
 457 {
 458         if (!strcmp(policy, "random"))
 459                 fd_policy = FD_RANDOM;
 460         else if (!strcmp(policy, "rotate"))
 461                 fd_policy = FD_ROTATE;
 462         else {
 463                 prt("unknown -I policy: '%s'\n", policy);
 464                 exit(1);
 465         }
 466 }
 467
 468 int
 469 get_fd(void)
 470 {
 471         struct test_file *tf = get_tf();
 472         return tf->fd;
 473 }
 474
 475 static const char *my_basename(const char *path)
 476 {
 477         char *c = strrchr(path, '/');
 478
 479         return c ? c++ : path;
 480 }
 481
 482 void
 483 open_test_files(char **argv, int argc)
 484 {
 485         struct test_file *tf;
 486         int i;
 487
 488         num_test_files = argc;
 489         if (num_test_files == 1)
 490                 fd_policy = FD_SINGLE;
 491
 492         test_files = calloc(num_test_files, sizeof(*test_files));
 493         if (test_files == NULL) {
 494                 prterr("reallocating space for test files");
 495                 exit(1);
 496         }
 497
 498         for (i = 0, tf = test_files; i < num_test_files; i++, tf++) {
 499
 500                 tf->path = argv[i];
 501                 tf->fd = open(tf->path, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC)|
 502                                 o_direct, 0666);
 503                 if (tf->fd < 0) {
 504                         prterr(tf->path);
 505                         exit(91);
 506                 }
 507         }
 508
 509         if (quiet || fd_policy == FD_SINGLE)
 510                 return;
 511
 512         for (i = 0, tf = test_files; i < num_test_files; i++, tf++)
 513                 prt("fd %d: %s\n", i, tf->path);
 514 }
 515
 516 void
 517 close_test_files(void)
 518 {
 519         int i;
 520         struct test_file *tf;
 521
 522         for (i = 0, tf = test_files; i < num_test_files; i++, tf++) {
 523                 if (close(tf->fd)) {
 524                         prterr("close");
 525                         report_failure(99);
 526                 }
 527         }
 528 }
 529
 530
 531 void
 532 check_size(void)
 533 {
 534         struct stat     statbuf;
 535         off_t   size_by_seek;
 536         int fd = get_fd();
 537
 538         if (fstat(fd, &statbuf)) {
 539                 prterr("check_size: fstat");
 540                 statbuf.st_size = -1;
 541         }
 542         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 543         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 544                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 545                     (unsigned long long)file_size,
 546                     (unsigned long long)statbuf.st_size,
 547                     (unsigned long long)size_by_seek);
 548                 report_failure(120);
 549         }
 550 }
 551
 552
 553 void
 554 check_trunc_hack(void)
 555 {
 556         struct stat statbuf;
 557         int fd = get_fd();
 558
 559         /* should not ignore ftruncate(2)'s return value */
 560         if (ftruncate(fd, (off_t)0) < 0) {
 561                 prterr("trunc_hack: ftruncate(0)");
 562                 exit(1);
 563         }
 564         if (ftruncate(fd, (off_t)100000) < 0) {
 565                 prterr("trunc_hack: ftruncate(100000)");
 566                 exit(1);
 567         }
 568         if (fstat(fd, &statbuf)) {
 569                 prterr("trunc_hack: fstat");
 570                 statbuf.st_size = -1;
 571         }
 572         if (statbuf.st_size != (off_t)100000) {
 573                 prt("no extend on truncate! not posix!\n");
 574                 exit(130);
 575         }
 576         if (ftruncate(fd, 0) < 0) {
 577                 prterr("trunc_hack: ftruncate(0) (2nd call)");
 578                 exit(1);
 579         }
 580 }
 581
 582 void
 583 output_line(struct test_file *tf, int op, unsigned offset,
 584                 unsigned size, struct timeval *tv)
 585 {
 586         char *ops[] = {
 587                 [OP_READ] = "read",
 588                 [OP_WRITE] = "write",
 589                 [OP_TRUNCATE] = "trunc from",
 590                 [OP_MAPREAD] = "mapread",
 591                 [OP_MAPWRITE] = "mapwrite",
 592         };
 593
 594         /* W. */
 595         if (!(!quiet && ((progressinterval &&
 596                         testcalls % progressinterval == 0) ||
 597                        (debug &&
 598                         (monitorstart == -1 ||
 599                          (offset + size > monitorstart &&
 600                           (monitorend == -1 || offset <= monitorend)))))))
 601                 return;
 602
 603         prt("%06lu%s %lu.%06lu %-10s %#08x %s %#08x\t(0x%x bytes)\n",
 604                 testcalls, fill_tf_buf(tf), tv->tv_sec, tv->tv_usec,
 605                 ops[op],
 606                 offset, op == OP_TRUNCATE ? " to " : "thru",
 607                 offset + size - 1, size);
 608 }
 609
 610 void
 611 doread(unsigned offset, unsigned size)
 612 {
 613         struct timeval t;
 614         off_t ret;
 615         unsigned iret;
 616         struct test_file *tf = get_tf();
 617         int fd = tf->fd;
 618
 619         offset -= offset % readbdy;
 620         if (o_direct)
 621                 size -= size % readbdy;
 622         gettimeofday(&t, NULL);
 623         if (size == 0) {
 624                 if (!quiet && testcalls > simulatedopcount && !o_direct)
 625                         prt("skipping zero size read\n");
 626                 log4(OP_SKIPPED, OP_READ, offset, size, &t, tf);
 627                 return;
 628         }
 629         if (size + offset > file_size) {
 630                 if (!quiet && testcalls > simulatedopcount)
 631                         prt("skipping seek/read past end of file\n");
 632                 log4(OP_SKIPPED, OP_READ, offset, size, &t, tf);
 633                 return;
 634         }
 635
 636         log4(OP_READ, offset, size, 0, &t, tf);
 637
 638         if (testcalls <= simulatedopcount)
 639                 return;
 640
 641         output_line(tf, OP_READ, offset, size, &t);
 642
 643         ret = lseek(fd, (off_t)offset, SEEK_SET);
 644         if (ret == (off_t)-1) {
 645                 prterr("doread: lseek");
 646                 report_failure(140);
 647         }
 648         iret = read(fd, temp_buf, size);
 649         if (!quiet && (debug > 1 &&
 650                         (monitorstart == -1 ||
 651                          (offset + size > monitorstart &&
 652                           (monitorend == -1 || offset <= monitorend))))) {
 653                 gettimeofday(&t, NULL);
 654                 prt("       %lu.%06lu read done\n", t.tv_sec, t.tv_usec);
 655         }
 656         if (iret != size) {
 657                 if (iret == -1)
 658                         prterr("doread: read");
 659                 else
 660                         prt("short read: 0x%x bytes instead of 0x%x\n",
 661                             iret, size);
 662                 report_failure(141);
 663         }
 664         check_buffers(offset, size);
 665 }
 666
 667
 668 void
 669 domapread(unsigned offset, unsigned size)
 670 {
 671         struct timeval t;
 672         unsigned pg_offset;
 673         unsigned map_size;
 674         char    *p;
 675         struct test_file *tf = get_tf();
 676         int fd = tf->fd;
 677
 678         offset -= offset % readbdy;
 679         gettimeofday(&t, NULL);
 680         if (size == 0) {
 681                 if (!quiet && testcalls > simulatedopcount)
 682                         prt("skipping zero size read\n");
 683                 log4(OP_SKIPPED, OP_MAPREAD, offset, size, &t, tf);
 684                 return;
 685         }
 686         if (size + offset > file_size) {
 687                 if (!quiet && testcalls > simulatedopcount)
 688                         prt("skipping seek/read past end of file\n");
 689                 log4(OP_SKIPPED, OP_MAPREAD, offset, size, &t, tf);
 690                 return;
 691         }
 692
 693         log4(OP_MAPREAD, offset, size, 0, &t, tf);
 694
 695         if (testcalls <= simulatedopcount)
 696                 return;
 697
 698         output_line(tf, OP_MAPREAD, offset, size, &t);
 699
 700         pg_offset = offset & page_mask;
 701         map_size  = pg_offset + size;
 702
 703         if ((p = mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
 704                       (off_t)(offset - pg_offset))) == MAP_FAILED) {
 705                 prterr("domapread: mmap");
 706                 report_failure(190);
 707         }
 708         if (!quiet && (debug > 1 &&
 709                         (monitorstart == -1 ||
 710                          (offset + size > monitorstart &&
 711                           (monitorend == -1 || offset <= monitorend))))) {
 712                 gettimeofday(&t, NULL);
 713                 prt("       %lu.%06lu mmap done\n", t.tv_sec, t.tv_usec);
 714         }
 715         memcpy(temp_buf, p + pg_offset, size);
 716         if (!quiet && (debug > 1 &&
 717                         (monitorstart == -1 ||
 718                          (offset + size > monitorstart &&
 719                           (monitorend == -1 || offset <= monitorend))))) {
 720                 gettimeofday(&t, NULL);
 721                 prt("       %lu.%06lu memcpy done\n", t.tv_sec, t.tv_usec);
 722         }
 723         if (munmap(p, map_size) != 0) {
 724                 prterr("domapread: munmap");
 725                 report_failure(191);
 726         }
 727         if (!quiet && (debug > 1 &&
 728                         (monitorstart == -1 ||
 729                          (offset + size > monitorstart &&
 730                           (monitorend == -1 || offset <= monitorend))))) {
 731                 gettimeofday(&t, NULL);
 732                 prt("       %lu.%06lu munmap done\n", t.tv_sec, t.tv_usec);
 733         }
 734
 735         check_buffers(offset, size);
 736 }
 737
 738
 739 void
 740 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 741 {
 742         while (size--) {
 743                 good_buf[offset] = testcalls % 256;
 744                 if (offset % 2)
 745                         good_buf[offset] += original_buf[offset];
 746                 offset++;
 747         }
 748 }
 749
 750
 751 void
 752 dowrite(unsigned offset, unsigned size)
 753 {
 754         struct timeval t;
 755         off_t ret;
 756         unsigned iret;
 757         struct test_file *tf = get_tf();
 758         int fd = tf->fd;
 759
 760         offset -= offset % writebdy;
 761         if (o_direct)
 762                 size -= size % writebdy;
 763         gettimeofday(&t, NULL);
 764         if (size == 0) {
 765                 if (!quiet && testcalls > simulatedopcount && !o_direct)
 766                         prt("skipping zero size write\n");
 767                 log4(OP_SKIPPED, OP_WRITE, offset, size, &t, tf);
 768                 return;
 769         }
 770
 771         log4(OP_WRITE, offset, size, file_size, &t, tf);
 772
 773         gendata(original_buf, good_buf, offset, size);
 774         if (file_size < offset + size) {
 775                 if (file_size < offset)
 776                         memset(good_buf + file_size, '\0', offset - file_size);
 777                 file_size = offset + size;
 778                 if (lite) {
 779                         warn("Lite file size bug in fsx!");
 780                         report_failure(149);
 781                 }
 782         }
 783
 784         if (testcalls <= simulatedopcount)
 785                 return;
 786
 787         output_line(tf, OP_WRITE, offset, size, &t);
 788
 789         ret = lseek(fd, (off_t)offset, SEEK_SET);
 790         if (ret == (off_t)-1) {
 791                 prterr("dowrite: lseek");
 792                 report_failure(150);
 793         }
 794         iret = write(fd, good_buf + offset, size);
 795         if (!quiet && (debug > 1 &&
 796                         (monitorstart == -1 ||
 797                          (offset + size > monitorstart &&
 798                           (monitorend == -1 || offset <= monitorend))))) {
 799                 gettimeofday(&t, NULL);
 800                 prt("       %lu.%06lu write done\n", t.tv_sec, t.tv_usec);
 801         }
 802         if (iret != size) {
 803                 if (iret == -1)
 804                         prterr("dowrite: write");
 805                 else
 806                         prt("short write: 0x%x bytes instead of 0x%x\n",
 807                             iret, size);
 808                 report_failure(151);
 809         }
 810 }
 811
 812
 813 void
 814 domapwrite(unsigned offset, unsigned size)
 815 {
 816         struct timeval t;
 817         unsigned pg_offset;
 818         unsigned map_size;
 819         off_t    cur_filesize;
 820         char    *p;
 821         struct test_file *tf = get_tf();
 822         int fd = tf->fd;
 823
 824         offset -= offset % writebdy;
 825         gettimeofday(&t, NULL);
 826         if (size == 0) {
 827                 if (!quiet && testcalls > simulatedopcount)
 828                         prt("skipping zero size write\n");
 829                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size, &t, tf);
 830                 return;
 831         }
 832         cur_filesize = file_size;
 833
 834         log4(OP_MAPWRITE, offset, size, 0, &t, tf);
 835
 836         gendata(original_buf, good_buf, offset, size);
 837         if (file_size < offset + size) {
 838                 if (file_size < offset)
 839                         memset(good_buf + file_size, '\0', offset - file_size);
 840                 file_size = offset + size;
 841                 if (lite) {
 842                         warn("Lite file size bug in fsx!");
 843                         report_failure(200);
 844                 }
 845         }
 846
 847         if (testcalls <= simulatedopcount)
 848                 return;
 849
 850         output_line(tf, OP_MAPWRITE, offset, size, &t);
 851
 852         if (file_size > cur_filesize) {
 853                 if (ftruncate(fd, file_size) == -1) {
 854                         prterr("domapwrite: ftruncate");
 855                         exit(201);
 856                 }
 857                 if (!quiet && (debug > 1 &&
 858                                (monitorstart == -1 ||
 859                                 (offset + size > monitorstart &&
 860                                  (monitorend == -1 || offset <= monitorend))))) {
 861                         gettimeofday(&t, NULL);
 862                         prt("       %lu.%06lu truncate done\n", t.tv_sec, t.tv_usec);
 863         }
 864         }
 865         pg_offset = offset & page_mask;
 866         map_size  = pg_offset + size;
 867
 868         if ((p = mmap(0, map_size, PROT_READ | PROT_WRITE, MAP_FILE|MAP_SHARED,
 869                       fd, (off_t)(offset - pg_offset))) == MAP_FAILED) {
 870                 prterr("domapwrite: mmap");
 871                 report_failure(202);
 872         }
 873         if (!quiet && (debug > 1 &&
 874                         (monitorstart == -1 ||
 875                          (offset + size > monitorstart &&
 876                           (monitorend == -1 || offset <= monitorend))))) {
 877                 gettimeofday(&t, NULL);
 878                 prt("       %lu.%06lu mmap done\n", t.tv_sec, t.tv_usec);
 879         }
 880         memcpy(p + pg_offset, good_buf + offset, size);
 881         if (!quiet && (debug > 1 &&
 882                         (monitorstart == -1 ||
 883                          (offset + size > monitorstart &&
 884                           (monitorend == -1 || offset <= monitorend))))) {
 885                 gettimeofday(&t, NULL);
 886                 prt("       %lu.%06lu memcpy done\n", t.tv_sec, t.tv_usec);
 887         }
 888         if (msync(p, map_size, 0) != 0) {
 889                 prterr("domapwrite: msync");
 890                 report_failure(203);
 891         }
 892         if (!quiet && (debug > 1 &&
 893                         (monitorstart == -1 ||
 894                          (offset + size > monitorstart &&
 895                           (monitorend == -1 || offset <= monitorend))))) {
 896                 gettimeofday(&t, NULL);
 897                 prt("       %lu.%06lu msync done\n", t.tv_sec, t.tv_usec);
 898         }
 899         if (munmap(p, map_size) != 0) {
 900                 prterr("domapwrite: munmap");
 901                 report_failure(204);
 902         }
 903         if (!quiet && (debug > 1 &&
 904                         (monitorstart == -1 ||
 905                          (offset + size > monitorstart &&
 906                           (monitorend == -1 || offset <= monitorend))))) {
 907                 gettimeofday(&t, NULL);
 908                 prt("       %lu.%06lu munmap done\n", t.tv_sec, t.tv_usec);
 909         }
 910 }
 911
 912
 913 void
 914 dotruncate(unsigned size)
 915 {
 916         struct timeval t;
 917         int oldsize = file_size;
 918         struct test_file *tf = get_tf();
 919         int fd = tf->fd;
 920
 921         size -= size % truncbdy;
 922         gettimeofday(&t, NULL);
 923         if (size > biggest) {
 924                 biggest = size;
 925                 if (!quiet && testcalls > simulatedopcount)
 926                         prt("truncating to largest ever: 0x%x\n", size);
 927         }
 928
 929         log4(OP_TRUNCATE, size, (unsigned)file_size, 0, &t, tf);
 930
 931         if (size > file_size)
 932                 memset(good_buf + file_size, '\0', size - file_size);
 933         file_size = size;
 934
 935         if (testcalls <= simulatedopcount)
 936                 return;
 937
 938         output_line(tf, OP_TRUNCATE, oldsize, size, &t);
 939
 940         if (ftruncate(fd, (off_t)size) == -1) {
 941                 prt("ftruncate1: %x\n", size);
 942                 prterr("dotruncate: ftruncate");
 943                 report_failure(160);
 944         }
 945         if (!quiet && debug > 1) {
 946                 gettimeofday(&t, NULL);
 947                 prt("       %lu.%06lu trunc done\n", t.tv_sec, t.tv_usec);
 948         }
 949 }
 950
 951
 952 void
 953 writefileimage()
 954 {
 955         ssize_t iret;
 956         int fd = get_fd();
 957
 958         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 959                 prterr("writefileimage: lseek");
 960                 report_failure(171);
 961         }
 962         iret = write(fd, good_buf, file_size);
 963         if ((off_t)iret != file_size) {
 964                 if (iret == -1)
 965                         prterr("writefileimage: write");
 966                 else
 967                         prt("short write: 0x%lx bytes instead of 0x%llx\n",
 968                             (unsigned long)iret,
 969                             (unsigned long long)file_size);
 970                 report_failure(172);
 971         }
 972         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 973                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
 974                 prterr("writefileimage: ftruncate");
 975                 report_failure(173);
 976         }
 977 }
 978
 979
 980 void
 981 docloseopen(void)
 982 {
 983         struct timeval t;
 984         struct test_file *tf = get_tf();
 985
 986         if (testcalls <= simulatedopcount)
 987                 return;
 988
 989         gettimeofday(&t, NULL);
 990         log4(OP_CLOSEOPEN, file_size, (unsigned)file_size, 0, &t, tf);
 991
 992         if (debug)
 993                 prt("%06lu %lu.%06lu close/open\n", testcalls, t.tv_sec,
 994                     t.tv_usec);
 995         if (close(tf->fd)) {
 996                 prterr("docloseopen: close");
 997                 report_failure(180);
 998         }
 999         if (!quiet && debug > 1) {
1000                 gettimeofday(&t, NULL);
1001                 prt("       %lu.%06lu close done\n", t.tv_sec, t.tv_usec);
1002         }
1003         tf->fd = open(tf->path, O_RDWR|o_direct, 0);
1004         if (tf->fd < 0) {
1005                 prterr("docloseopen: open");
1006                 report_failure(181);
1007         }
1008         if (!quiet && debug > 1) {
1009                 gettimeofday(&t, NULL);
1010                 prt("       %lu.%06lu open done\n", t.tv_sec, t.tv_usec);
1011         }
1012 }
1013
1014
1015 void
1016 test(void)
1017 {
1018         unsigned long   offset;
1019         unsigned long   size = maxoplen;
1020         unsigned long   rv = random();
1021         unsigned long   op = rv % (3 + !lite + mapped_writes);
1022
1023         /* turn off the map read if necessary */
1024
1025         if (op == 2 && !mapped_reads)
1026             op = 0;
1027
1028         if (simulatedopcount > 0 && testcalls == simulatedopcount)
1029                 writefileimage();
1030
1031         testcalls++;
1032
1033         if (debugstart > 0 && testcalls >= debugstart)
1034                 debug = 1;
1035
1036         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
1037                 prt("%lu...\n", testcalls);
1038
1039         /*
1040          * READ:        op = 0
1041          * WRITE:       op = 1
1042          * MAPREAD:     op = 2
1043          * TRUNCATE:    op = 3
1044          * MAPWRITE:    op = 3 or 4
1045          */
1046         if (lite ? 0 : op == 3 && (style & 1) == 0) /* vanilla truncate? */
1047                 dotruncate(random() % maxfilelen);
1048         else {
1049                 if (randomoplen)
1050                         size = random() % (maxoplen+1);
1051                 if (lite ? 0 : op == 3)
1052                         dotruncate(size);
1053                 else {
1054                         offset = random();
1055                         if (op == 1 || op == (lite ? 3 : 4)) {
1056                                 offset %= maxfilelen;
1057                                 if (offset + size > maxfilelen)
1058                                         size = maxfilelen - offset;
1059                                 if (op != 1)
1060                                         domapwrite(offset, size);
1061                                 else
1062                                         dowrite(offset, size);
1063                         } else {
1064                                 if (file_size)
1065                                         offset %= file_size;
1066                                 else
1067                                         offset = 0;
1068                                 if (offset + size > file_size)
1069                                         size = file_size - offset;
1070                                 if (op != 0)
1071                                         domapread(offset, size);
1072                                 else
1073                                         doread(offset, size);
1074                         }
1075                 }
1076         }
1077         if (sizechecks && testcalls > simulatedopcount)
1078                 check_size();
1079         if (closeprob && (rv >> 3) < (1 << 28) / closeprob)
1080                 docloseopen();
1081 }
1082
1083
1084 void
1085 cleanup(sig)
1086         int     sig;
1087 {
1088         if (sig)
1089                 prt("signal %d\n", sig);
1090         prt("testcalls = %lu\n", testcalls);
1091         exit(sig);
1092 }
1093
1094
1095 void
1096 usage(void)
1097 {
1098         fprintf(stdout, "usage: %s",
1099                 "fsx [-dnqLOW] [-b opnum] [-c Prob] [-l flen] [-m "
1100 "start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t "
1101 "truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed] "
1102 "[ -I random|rotate ] fname [additional paths to fname..]\n"
1103 "       -b opnum: beginning operation number (default 1)\n"
1104 "       -c P: 1 in P chance of file close+open at each op (default infinity)\n"
1105 "       -d: debug output for all operations [-d -d = more debugging]\n"
1106 "       -l flen: the upper bound on file size (default 262144)\n"
1107 "       -m startop:endop: monitor (print debug output) specified byte rang"
1108 "(default 0:infinity)\n"
1109 "       -n: no verifications of file size\n"
1110 "       -o oplen: the upper bound on operation size (default 65536)\n"
1111 "       -p progressinterval: debug output at specified operation interval\n"
1112 "       -q: quieter operation\n"
1113 "       -r readbdy: 4096 would make reads page aligned (default 1)\n"
1114 "       -s style: 1 gives smaller truncates (default 0)\n"
1115 "       -t truncbdy: 4096 would make truncates page aligned (default 1)\n"
1116 "       -w writebdy: 4096 would make writes page aligned (default 1)\n"
1117 "       -D startingop: debug output starting at specified operation\n"
1118 "       -L: fsxLite - no file creations & no file size changes\n"
1119 "       -N numops: total # operations to do (default infinity)\n"
1120 "       -O: use oplen (see -o flag) for every op (default random)\n"
1121 "       -P: save .fsxlog and .fsxgood files in dirpath (default ./)\n"
1122 "       -S seed: for random # generator (default 1) 0 gets timestamp\n"
1123 "       -W: mapped write operations DISabled\n"
1124 "       -R: read() system calls only (mapped reads disabled)\n"
1125 "       -Z: O_DIRECT (use -R, -W, -r and -w too)\n"
1126 "       -I: When multiple paths to the file are given each operation uses\n"
1127 "           a different path.  Iterate through them in order with 'rotate'\n"
1128 "           or chose then at 'random'.  (defaults to random)\n"
1129 "       fname: this filename is REQUIRED (no default)\n");
1130         exit(90);
1131 }
1132
1133
1134 int
1135 getnum(char *s, char **e)
1136 {
1137         int ret = -1;
1138
1139         *e = (char *) 0;
1140         ret = strtol(s, e, 0);
1141         if (*e)
1142                 switch (**e) {
1143                 case 'b':
1144                 case 'B':
1145                         ret *= 512;
1146                         *e = *e + 1;
1147                         break;
1148                 case 'k':
1149                 case 'K':
1150                         ret *= 1024;
1151                         *e = *e + 1;
1152                         break;
1153                 case 'm':
1154                 case 'M':
1155                         ret *= 1024*1024;
1156                         *e = *e + 1;
1157                         break;
1158                 case 'w':
1159                 case 'W':
1160                         ret *= 4;
1161                         *e = *e + 1;
1162                         break;
1163                 }
1164         return (ret);
1165 }
1166
1167 int
1168 main(int argc, char **argv)
1169 {
1170         int     i, style, ch;
1171         char    *endp;
1172         int  dirpath = 0;
1173
1174         goodfile[0] = 0;
1175         logfile[0] = 0;
1176
1177         page_size = getpagesize();
1178         page_mask = page_size - 1;
1179
1180         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
1181
1182         while ((ch = getopt(argc, argv,
1183                                 "b:c:dl:m:no:p:qr:s:t:w:D:I:LN:OP:RS:WZ"))
1184                != EOF)
1185                 switch (ch) {
1186                 case 'b':
1187                         simulatedopcount = getnum(optarg, &endp);
1188                         if (!quiet)
1189                                 fprintf(stdout, "Will begin at operation"
1190                                         "%ld\n",
1191                                         simulatedopcount);
1192                         if (simulatedopcount == 0)
1193                                 usage();
1194                         simulatedopcount -= 1;
1195                         break;
1196                 case 'c':
1197                         closeprob = getnum(optarg, &endp);
1198                         if (!quiet)
1199                                 fprintf(stdout,
1200                                         "Chance of close/open is 1 in %d\n",
1201                                         closeprob);
1202                         if (closeprob <= 0)
1203                                 usage();
1204                         break;
1205                 case 'd':
1206                         debug++;
1207                         break;
1208                 case 'l':
1209                         maxfilelen = getnum(optarg, &endp);
1210                         if (maxfilelen <= 0)
1211                                 usage();
1212                         break;
1213                 case 'm':
1214                         monitorstart = getnum(optarg, &endp);
1215                         if (monitorstart < 0)
1216                                 usage();
1217                         if (!endp || *endp++ != ':')
1218                                 usage();
1219                         monitorend = getnum(endp, &endp);
1220                         if (monitorend < 0)
1221                                 usage();
1222                         if (monitorend == 0)
1223                                 monitorend = -1; /* aka infinity */
1224                         debug = 1;
1225                 case 'n':
1226                         sizechecks = 0;
1227                         break;
1228                 case 'o':
1229                         maxoplen = getnum(optarg, &endp);
1230                         if (maxoplen <= 0)
1231                                 usage();
1232                         break;
1233                 case 'p':
1234                         progressinterval = getnum(optarg, &endp);
1235                         if (progressinterval < 0)
1236                                 usage();
1237                         break;
1238                 case 'q':
1239                         quiet = 1;
1240                         break;
1241                 case 'r':
1242                         readbdy = getnum(optarg, &endp);
1243                         if (readbdy <= 0)
1244                                 usage();
1245                         break;
1246                 case 's':
1247                         style = getnum(optarg, &endp);
1248                         if (style < 0 || style > 1)
1249                                 usage();
1250                         break;
1251                 case 't':
1252                         truncbdy = getnum(optarg, &endp);
1253                         if (truncbdy <= 0)
1254                                 usage();
1255                         break;
1256                 case 'w':
1257                         writebdy = getnum(optarg, &endp);
1258                         if (writebdy <= 0)
1259                                 usage();
1260                         break;
1261                 case 'D':
1262                         debugstart = getnum(optarg, &endp);
1263                         if (debugstart < 1)
1264                                 usage();
1265                         break;
1266                 case 'I':
1267                         assign_fd_policy(optarg);
1268                         break;
1269                 case 'L':
1270                         lite = 1;
1271                         break;
1272                 case 'N':
1273                         numops = getnum(optarg, &endp);
1274                         if (numops < 0)
1275                                 usage();
1276                         break;
1277                 case 'O':
1278                         randomoplen = 0;
1279                         break;
1280                 case 'P':
1281                         strncpy(goodfile, optarg, sizeof(goodfile) - 1);
1282                         strcat(goodfile, "/");
1283                         strncpy(logfile, optarg, sizeof(logfile) - 1);
1284                         strcat(logfile, "/");
1285                         dirpath = 1;
1286                         break;
1287                 case 'R':
1288                         mapped_reads = 0;
1289                         break;
1290                 case 'S':
1291                         seed = getnum(optarg, &endp);
1292                         if (seed == 0)
1293                                 seed = time(0) % 10000;
1294                         if (!quiet)
1295                                 fprintf(stdout, "Seed set to %d\n", seed);
1296                         if (seed < 0)
1297                                 usage();
1298                         break;
1299                 case 'W':
1300                         mapped_writes = 0;
1301                         if (!quiet)
1302                                 fprintf(stdout, "mapped writes DISABLED\n");
1303                         break;
1304                 case 'Z':
1305                         o_direct = O_DIRECT;
1306                         break;
1307
1308                 default:
1309                         usage();
1310                         /* NOTREACHED */
1311                 }
1312         argc -= optind;
1313         argv += optind;
1314         if (argc < 1)
1315                 usage();
1316         fname = argv[0];
1317
1318         signal(SIGHUP,  cleanup);
1319         signal(SIGINT,  cleanup);
1320         signal(SIGPIPE, cleanup);
1321         signal(SIGALRM, cleanup);
1322         signal(SIGTERM, cleanup);
1323         signal(SIGXCPU, cleanup);
1324         signal(SIGXFSZ, cleanup);
1325         signal(SIGVTALRM,       cleanup);
1326         signal(SIGUSR1, cleanup);
1327         signal(SIGUSR2, cleanup);
1328
1329         initstate(seed, state, 256);
1330         setstate(state);
1331
1332         open_test_files(argv, argc);
1333
1334         strncat(goodfile, dirpath ? my_basename(fname) : fname, 256);
1335         strcat (goodfile, ".fsxgood");
1336         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1337         if (fsxgoodfd < 0) {
1338                 prterr(goodfile);
1339                 exit(92);
1340         }
1341         strncat(logfile, dirpath ? my_basename(fname) : fname, 256);
1342         strcat (logfile, ".fsxlog");
1343         fsxlogf = fopen(logfile, "w");
1344         if (fsxlogf == NULL) {
1345                 prterr(logfile);
1346                 exit(93);
1347         }
1348         if (lite) {
1349                 off_t ret;
1350                 int fd = get_fd();
1351                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1352                 if (file_size == (off_t)-1) {
1353                         prterr(fname);
1354                         warn("main: lseek eof");
1355                         exit(94);
1356                 }
1357                 ret = lseek(fd, (off_t)0, SEEK_SET);
1358                 if (ret == (off_t)-1) {
1359                         prterr(fname);
1360                         warn("main: lseek 0");
1361                         exit(95);
1362                 }
1363         }
1364         original_buf = (char *) malloc(maxfilelen);
1365         for (i = 0; i < maxfilelen; i++)
1366                 original_buf[i] = random() % 256;
1367         if (o_direct) {
1368                 int ret;
1369
1370                 ret = posix_memalign((void **)&good_buf, writebdy, maxfilelen);
1371                 if (ret) {
1372                         prt("main: posix_memalign failed: %s\n", strerror(ret));
1373                         exit(96);
1374                 }
1375
1376                 ret = posix_memalign((void **)&temp_buf, readbdy, maxoplen);
1377                 if (ret) {
1378                         prt("main: posix_memalign failed: %s\n", strerror(ret));
1379                         exit(97);
1380                 }
1381         } else {
1382                 good_buf = malloc(maxfilelen);
1383                 if (!good_buf) {
1384                         prt("malloc failed.\n");
1385                         exit(98);
1386                 }
1387
1388                 temp_buf = malloc(maxoplen);
1389                 if (!temp_buf) {
1390                         prt("malloc failed.\n");
1391                         exit(99);
1392                 }
1393         }
1394         memset(good_buf, 0, maxfilelen);
1395         memset(temp_buf, 0, maxoplen);
1396
1397         if (lite) {     /* zero entire existing file */
1398                 ssize_t written;
1399                 int fd = get_fd();
1400
1401                 written = write(fd, good_buf, (size_t)maxfilelen);
1402                 if (written != maxfilelen) {
1403                         if (written == -1) {
1404                                 prterr(fname);
1405                                 warn("main: error on write");
1406                         } else
1407                                 warn("main: short write, 0x%x bytes instead"
1408                                         "of 0x%x\n",
1409                                      (unsigned)written, maxfilelen);
1410                         exit(98);
1411                 }
1412         } else
1413                 check_trunc_hack();
1414
1415         while (numops == -1 || numops--)
1416                 test();
1417
1418         close_test_files();
1419         prt("All operations completed A-OK!\n");
1420
1421         exit(0);
1422         return 0;
1423 }