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 #include <libcfs/util/string.h>
  61
  62 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  63
  64 /*
  65  * Each test run will work with one or more separate file descriptors for the
  66  * same file.  This allows testing cache coherency across multiple mountpoints
  67  * of the same network filesystem on a single client.
  68  */
  69 struct test_file {
  70         char *path;
  71         int fd;
  72 } *test_files = NULL;
  73
  74 int num_test_files;
  75 enum fd_iteration_policy {
  76         FD_SINGLE,
  77         FD_ROTATE,
  78         FD_RANDOM,
  79 };
  80 int fd_policy = FD_RANDOM;
  81 int fd_last;
  82
  83 /*
  84  *      A log entry is an operation and a bunch of arguments.
  85  */
  86
  87 struct log_entry {
  88         int                     operation;
  89         int                     args[3];
  90         struct timeval          tv;
  91         const struct test_file  *tf;
  92 };
  93
  94 #define LOGSIZE 100000
  95
  96 struct log_entry        oplog[LOGSIZE]; /* the log */
  97 int                     logptr = 0;     /* current position in log */
  98 int                     logcount = 0;   /* total ops */
  99
 100 /*
 101  *      Define operations
 102  */
 103
 104 #define OP_READ         1
 105 #define OP_WRITE        2
 106 #define OP_TRUNCATE     3
 107 #define OP_CLOSEOPEN    4
 108 #define OP_MAPREAD      5
 109 #define OP_MAPWRITE     6
 110 #define OP_SKIPPED      7
 111
 112 int page_size;
 113 int page_mask;
 114
 115 char    *original_buf;                  /* a pointer to the original data */
 116 char    *good_buf;                      /* a pointer to the correct data */
 117 char    *temp_buf;                      /* a pointer to the current data */
 118 char    *fname;                         /* name of our test file */
 119 char    logfile[PATH_MAX];              /* name of our log file */
 120 char    goodfile[PATH_MAX];             /* name of our test file */
 121
 122 off_t           file_size = 0;
 123 off_t           biggest = 0;
 124 char            state[256];
 125 unsigned long   testcalls = 0;          /* calls to function "test" */
 126
 127 long    simulatedopcount = 0;           /* -b flag */
 128 int     closeprob = 0;                  /* -c flag */
 129 int     debug = 0;                      /* -d flag */
 130 long    debugstart = 0;                 /* -D flag */
 131 long    maxfilelen = 256 * 1024;        /* -l flag */
 132 int     sizechecks = 1;                 /* -n flag disables them */
 133 int     maxoplen = 64 * 1024;           /* -o flag */
 134 int     quiet = 0;                      /* -q flag */
 135 long    progressinterval = 0;           /* -p flag */
 136 int     readbdy = 1;                    /* -r flag */
 137 int     style = 0;                      /* -s flag */
 138 int     truncbdy = 1;                   /* -t flag */
 139 int     writebdy = 1;                   /* -w flag */
 140 long    monitorstart = -1;              /* -m flag */
 141 long    monitorend = -1;                /* -m flag */
 142 int     lite = 0;                       /* -L flag */
 143 long    numops = -1;                    /* -N flag */
 144 int     randomoplen = 1;                /* -O flag disables it */
 145 int     seed = 1;                       /* -S flag */
 146 int     mapped_writes = 1;              /* -W flag disables */
 147 int     mapped_reads = 1;               /* -R flag disables it */
 148 int     fsxgoodfd = 0;
 149 int     o_direct;                       /* -Z */
 150 FILE *  fsxlogf = NULL;
 151 int badoff = -1;
 152
 153 void
 154 vwarnc(code, fmt, ap)
 155         int code;
 156         const char *fmt;
 157         va_list ap;
 158 {
 159         fprintf(stderr, "fsx: ");
 160         if (fmt != NULL) {
 161                 vfprintf(stderr, fmt, ap);
 162                 fprintf(stderr, ": ");
 163         }
 164         fprintf(stderr, "%s\n", strerror(code));
 165 }
 166
 167
 168 void
 169 warn(const char * fmt, ...)
 170 {
 171         va_list ap;
 172         va_start(ap, fmt);
 173         vwarnc(errno, fmt, ap);
 174         va_end(ap);
 175 }
 176
 177
 178 void
 179 __attribute__((format(printf, 1, 2)))
 180 prt(char *fmt, ...)
 181 {
 182         va_list args;
 183
 184         va_start(args, fmt);
 185         vfprintf(stdout, fmt, args);
 186         va_end(args);
 187
 188         if (fsxlogf) {
 189                 va_start(args, fmt);
 190                 vfprintf(fsxlogf, fmt, args);
 191                 va_end(args);
 192         }
 193 }
 194
 195 void
 196 prterr(char *prefix)
 197 {
 198         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 199 }
 200
 201
 202 void
 203 log4(int operation, int arg0, int arg1, int arg2, struct timeval *tv,
 204         const struct test_file *tf)
 205 {
 206         struct log_entry *le;
 207
 208         le = &oplog[logptr];
 209         le->operation = operation;
 210         le->args[0] = arg0;
 211         le->args[1] = arg1;
 212         le->args[2] = arg2;
 213         le->tv = *tv;
 214         le->tf = tf;
 215         logptr++;
 216         logcount++;
 217         if (logptr >= LOGSIZE)
 218                 logptr = 0;
 219 }
 220
 221 const char *
 222 fill_tf_buf(const struct test_file *tf)
 223 {
 224         static int max_tf_len;
 225         static char tf_buf[32];
 226
 227         if (fd_policy == FD_SINGLE)
 228                 return "";
 229
 230         if (max_tf_len == 0)
 231                 max_tf_len = scnprintf(tf_buf, sizeof(tf_buf) - 1,
 232                                       "%u", num_test_files - 1);
 233
 234         snprintf(tf_buf, sizeof(tf_buf), "[%0*lu]", max_tf_len,
 235                 (unsigned long)(tf - test_files));
 236
 237         return tf_buf;
 238 }
 239
 240 void
 241 logdump(void)
 242 {
 243         int     i, count, down;
 244         struct log_entry        *lp;
 245
 246         prt("LOG DUMP (%d total operations):\n", logcount);
 247         if (logcount < LOGSIZE) {
 248                 i = 0;
 249                 count = logcount;
 250         } else {
 251                 i = logptr;
 252                 count = LOGSIZE;
 253         }
 254         for ( ; count > 0; count--) {
 255                 int opnum;
 256
 257                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 258                 lp = &oplog[i];
 259                 prt("%d%s: %lu.%06lu ", opnum, fill_tf_buf(lp->tf),
 260                     lp->tv.tv_sec, lp->tv.tv_usec);
 261
 262                 switch (lp->operation) {
 263                 case OP_MAPREAD:
 264                         prt("MAPREAD  0x%x thru 0x%x (0x%x bytes)",
 265                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 266                             lp->args[1]);
 267                         if (badoff >= lp->args[0] && badoff <
 268                                                      lp->args[0] + lp->args[1])
 269                                 prt("\t***RRRR***");
 270                         break;
 271                 case OP_MAPWRITE:
 272                         prt("MAPWRITE 0x%x thru 0x%x (0x%x bytes)",
 273                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 274                             lp->args[1]);
 275                         if (badoff >= lp->args[0] && badoff <
 276                                                      lp->args[0] + lp->args[1])
 277                                 prt("\t******WWWW");
 278                         break;
 279                 case OP_READ:
 280                         prt("READ     0x%x thru 0x%x (0x%x bytes)",
 281                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 282                             lp->args[1]);
 283                         if (badoff >= lp->args[0] &&
 284                             badoff < lp->args[0] + lp->args[1])
 285                                 prt("\t***RRRR***");
 286                         break;
 287                 case OP_WRITE:
 288                         prt("WRITE    0x%x thru 0x%x (0x%x bytes)",
 289                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 290                             lp->args[1]);
 291                         if (lp->args[0] > lp->args[2])
 292                                 prt(" HOLE");
 293                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 294                                 prt(" EXTEND");
 295                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
 296                             badoff < lp->args[0] + lp->args[1])
 297                                 prt("\t***WWWW");
 298                         break;
 299                 case OP_TRUNCATE:
 300                         down = lp->args[0] < lp->args[1];
 301                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 302                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
 303                         if (badoff >= lp->args[!down] &&
 304                             badoff < lp->args[!!down])
 305                                 prt("\t******WWWW");
 306                         break;
 307                 case OP_CLOSEOPEN:
 308                         prt("CLOSE/OPEN");
 309                         break;
 310                 case OP_SKIPPED:
 311                         prt("SKIPPED (no operation)");
 312                         break;
 313                 default:
 314                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 315                             lp->operation);
 316                 }
 317                 prt("\n");
 318                 i++;
 319                 if (i == LOGSIZE)
 320                         i = 0;
 321         }
 322 }
 323
 324
 325 void
 326 save_buffer(char *buffer, off_t bufferlength, int fd)
 327 {
 328         off_t ret;
 329         ssize_t byteswritten;
 330
 331         if (fd <= 0 || bufferlength == 0)
 332                 return;
 333
 334         if (bufferlength > SSIZE_MAX) {
 335                 prt("fsx flaw: overflow in save_buffer\n");
 336                 exit(67);
 337         }
 338         if (lite) {
 339                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 340                 if (size_by_seek == (off_t)-1)
 341                         prterr("save_buffer: lseek eof");
 342                 else if (bufferlength > size_by_seek) {
 343                         warn("save_buffer: .fsxgood file too short... will"
 344                                 "save 0x%llx bytes instead of 0x%llx\n",
 345                                 (unsigned long long)size_by_seek,
 346                                 (unsigned long long)bufferlength);
 347                         bufferlength = size_by_seek;
 348                 }
 349         }
 350
 351         ret = lseek(fd, (off_t)0, SEEK_SET);
 352         if (ret == (off_t)-1)
 353                 prterr("save_buffer: lseek 0");
 354
 355         byteswritten = write(fd, buffer, (size_t)bufferlength);
 356         if (byteswritten != bufferlength) {
 357                 if (byteswritten == -1)
 358                         prterr("save_buffer write");
 359                 else
 360                         warn("save_buffer: short write, 0x%x bytes instead"
 361                                 "of 0x%llx\n",
 362                              (unsigned)byteswritten,
 363                              (unsigned long long)bufferlength);
 364         }
 365 }
 366
 367
 368 void
 369 report_failure(int status)
 370 {
 371         logdump();
 372
 373         if (fsxgoodfd) {
 374                 if (good_buf) {
 375                         save_buffer(good_buf, file_size, fsxgoodfd);
 376                         prt("Correct content saved for comparison\n");
 377                         prt("(maybe hexdump \"%s\" vs \"%s\")\n",
 378                             fname, goodfile);
 379                 }
 380                 close(fsxgoodfd);
 381         }
 382         exit(status);
 383 }
 384
 385
 386 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 387                                         *(((unsigned char *)(cp)) + 1)))
 388
 389 void
 390 check_buffers(unsigned offset, unsigned size)
 391 {
 392         unsigned char c, t;
 393         unsigned i = 0;
 394         unsigned n = 0;
 395         unsigned op = 0;
 396         unsigned bad = 0;
 397
 398         if (memcmp(good_buf + offset, temp_buf, size) != 0) {
 399                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
 400                     offset, size);
 401                 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
 402                 while (size > 0) {
 403                         c = good_buf[offset];
 404                         t = temp_buf[i];
 405                         if (c != t) {
 406                                 if (n == 0) {
 407                                         bad = short_at(&temp_buf[i]);
 408                                         prt("%#07x\t%#06x\t%#06x", offset,
 409                                             short_at(&good_buf[offset]), bad);
 410                                         op = temp_buf[offset & 1 ? i+1 : i];
 411                                 }
 412                                 n++;
 413                                 badoff = offset;
 414                         }
 415                         offset++;
 416                         i++;
 417                         size--;
 418                 }
 419                 if (n) {
 420                         prt("\t%#7x\n", n);
 421                         if (bad)
 422                                 prt("operation# (mod 256) for the bad data"
 423                                         "may be %u\n", ((unsigned)op & 0xff));
 424                         else
 425                                 prt("operation# (mod 256) for the bad data"
 426                                         "unknown, check HOLE and EXTEND ops\n");
 427                 } else
 428                         prt("????????????????\n");
 429                 report_failure(110);
 430         }
 431 }
 432
 433 struct test_file *
 434 get_tf(void)
 435 {
 436         unsigned index = 0;
 437
 438         switch (fd_policy) {
 439                 case FD_ROTATE:
 440                         index = fd_last++;
 441                         break;
 442                 case FD_RANDOM:
 443                         index = random();
 444                         break;
 445                 case FD_SINGLE:
 446                         index = 0;
 447                         break;
 448                 default:
 449                         prt("unknown policy");
 450                         exit(1);
 451                         break;
 452         }
 453         return &test_files[ index % num_test_files ];
 454 }
 455
 456 void
 457 assign_fd_policy(char *policy)
 458 {
 459         if (!strcmp(policy, "random"))
 460                 fd_policy = FD_RANDOM;
 461         else if (!strcmp(policy, "rotate"))
 462                 fd_policy = FD_ROTATE;
 463         else {
 464                 prt("unknown -I policy: '%s'\n", policy);
 465                 exit(1);
 466         }
 467 }
 468
 469 int
 470 get_fd(void)
 471 {
 472         struct test_file *tf = get_tf();
 473         return tf->fd;
 474 }
 475
 476 static const char *my_basename(const char *path)
 477 {
 478         char *c = strrchr(path, '/');
 479
 480         return c ? c++ : path;
 481 }
 482
 483 void
 484 open_test_files(char **argv, int argc)
 485 {
 486         struct test_file *tf;
 487         int i;
 488
 489         num_test_files = argc;
 490         if (num_test_files == 1)
 491                 fd_policy = FD_SINGLE;
 492
 493         test_files = calloc(num_test_files, sizeof(*test_files));
 494         if (test_files == NULL) {
 495                 prterr("reallocating space for test files");
 496                 exit(1);
 497         }
 498
 499         for (i = 0, tf = test_files; i < num_test_files; i++, tf++) {
 500
 501                 tf->path = argv[i];
 502                 tf->fd = open(tf->path, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC)|
 503                                 o_direct, 0666);
 504                 if (tf->fd < 0) {
 505                         prterr(tf->path);
 506                         exit(91);
 507                 }
 508         }
 509
 510         if (quiet || fd_policy == FD_SINGLE)
 511                 return;
 512
 513         for (i = 0, tf = test_files; i < num_test_files; i++, tf++)
 514                 prt("fd %d: %s\n", i, tf->path);
 515 }
 516
 517 void
 518 close_test_files(void)
 519 {
 520         int i;
 521         struct test_file *tf;
 522
 523         for (i = 0, tf = test_files; i < num_test_files; i++, tf++) {
 524                 if (close(tf->fd)) {
 525                         prterr("close");
 526                         report_failure(99);
 527                 }
 528         }
 529 }
 530
 531
 532 void
 533 check_size(void)
 534 {
 535         struct stat     statbuf;
 536         off_t   size_by_seek;
 537         int fd = get_fd();
 538
 539         if (fstat(fd, &statbuf)) {
 540                 prterr("check_size: fstat");
 541                 statbuf.st_size = -1;
 542         }
 543         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 544         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 545                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 546                     (unsigned long long)file_size,
 547                     (unsigned long long)statbuf.st_size,
 548                     (unsigned long long)size_by_seek);
 549                 report_failure(120);
 550         }
 551 }
 552
 553
 554 void
 555 check_trunc_hack(void)
 556 {
 557         struct stat statbuf;
 558         int fd = get_fd();
 559
 560         /* should not ignore ftruncate(2)'s return value */
 561         if (ftruncate(fd, (off_t)0) < 0) {
 562                 prterr("trunc_hack: ftruncate(0)");
 563                 exit(1);
 564         }
 565         if (ftruncate(fd, (off_t)100000) < 0) {
 566                 prterr("trunc_hack: ftruncate(100000)");
 567                 exit(1);
 568         }
 569         if (fstat(fd, &statbuf)) {
 570                 prterr("trunc_hack: fstat");
 571                 statbuf.st_size = -1;
 572         }
 573         if (statbuf.st_size != (off_t)100000) {
 574                 prt("no extend on truncate! not posix!\n");
 575                 exit(130);
 576         }
 577         if (ftruncate(fd, 0) < 0) {
 578                 prterr("trunc_hack: ftruncate(0) (2nd call)");
 579                 exit(1);
 580         }
 581 }
 582
 583 void
 584 output_line(struct test_file *tf, int op, unsigned offset,
 585                 unsigned size, struct timeval *tv)
 586 {
 587         char *ops[] = {
 588                 [OP_READ] = "read",
 589                 [OP_WRITE] = "write",
 590                 [OP_TRUNCATE] = "trunc from",
 591                 [OP_MAPREAD] = "mapread",
 592                 [OP_MAPWRITE] = "mapwrite",
 593         };
 594
 595         /* W. */
 596         if (!(!quiet && ((progressinterval &&
 597                         testcalls % progressinterval == 0) ||
 598                        (debug &&
 599                         (monitorstart == -1 ||
 600                          (offset + size > monitorstart &&
 601                           (monitorend == -1 || offset <= monitorend)))))))
 602                 return;
 603
 604         prt("%06lu%s %lu.%06lu %-10s %#08x %s %#08x\t(0x%x bytes)\n",
 605                 testcalls, fill_tf_buf(tf), tv->tv_sec, tv->tv_usec,
 606                 ops[op],
 607                 offset, op == OP_TRUNCATE ? " to " : "thru",
 608                 offset + size - 1, size);
 609 }
 610
 611 void
 612 doread(unsigned offset, unsigned size)
 613 {
 614         struct timeval t;
 615         off_t ret;
 616         unsigned iret;
 617         struct test_file *tf = get_tf();
 618         int fd = tf->fd;
 619
 620         offset -= offset % readbdy;
 621         if (o_direct)
 622                 size -= size % readbdy;
 623         gettimeofday(&t, NULL);
 624         if (size == 0) {
 625                 if (!quiet && testcalls > simulatedopcount && !o_direct)
 626                         prt("skipping zero size read\n");
 627                 log4(OP_SKIPPED, OP_READ, offset, size, &t, tf);
 628                 return;
 629         }
 630         if (size + offset > file_size) {
 631                 if (!quiet && testcalls > simulatedopcount)
 632                         prt("skipping seek/read past end of file\n");
 633                 log4(OP_SKIPPED, OP_READ, offset, size, &t, tf);
 634                 return;
 635         }
 636
 637         log4(OP_READ, offset, size, 0, &t, tf);
 638
 639         if (testcalls <= simulatedopcount)
 640                 return;
 641
 642         output_line(tf, OP_READ, offset, size, &t);
 643
 644         ret = lseek(fd, (off_t)offset, SEEK_SET);
 645         if (ret == (off_t)-1) {
 646                 prterr("doread: lseek");
 647                 report_failure(140);
 648         }
 649         iret = read(fd, temp_buf, size);
 650         if (!quiet && (debug > 1 &&
 651                         (monitorstart == -1 ||
 652                          (offset + size > monitorstart &&
 653                           (monitorend == -1 || offset <= monitorend))))) {
 654                 gettimeofday(&t, NULL);
 655                 prt("       %lu.%06lu read done\n", t.tv_sec, t.tv_usec);
 656         }
 657         if (iret != size) {
 658                 if (iret == -1)
 659                         prterr("doread: read");
 660                 else
 661                         prt("short read: 0x%x bytes instead of 0x%x\n",
 662                             iret, size);
 663                 report_failure(141);
 664         }
 665         check_buffers(offset, size);
 666 }
 667
 668
 669 void
 670 domapread(unsigned offset, unsigned size)
 671 {
 672         struct timeval t;
 673         unsigned pg_offset;
 674         unsigned map_size;
 675         char    *p;
 676         struct test_file *tf = get_tf();
 677         int fd = tf->fd;
 678
 679         offset -= offset % readbdy;
 680         gettimeofday(&t, NULL);
 681         if (size == 0) {
 682                 if (!quiet && testcalls > simulatedopcount)
 683                         prt("skipping zero size read\n");
 684                 log4(OP_SKIPPED, OP_MAPREAD, offset, size, &t, tf);
 685                 return;
 686         }
 687         if (size + offset > file_size) {
 688                 if (!quiet && testcalls > simulatedopcount)
 689                         prt("skipping seek/read past end of file\n");
 690                 log4(OP_SKIPPED, OP_MAPREAD, offset, size, &t, tf);
 691                 return;
 692         }
 693
 694         log4(OP_MAPREAD, offset, size, 0, &t, tf);
 695
 696         if (testcalls <= simulatedopcount)
 697                 return;
 698
 699         output_line(tf, OP_MAPREAD, offset, size, &t);
 700
 701         pg_offset = offset & page_mask;
 702         map_size  = pg_offset + size;
 703
 704         if ((p = mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
 705                       (off_t)(offset - pg_offset))) == MAP_FAILED) {
 706                 prterr("domapread: mmap");
 707                 report_failure(190);
 708         }
 709         if (!quiet && (debug > 1 &&
 710                         (monitorstart == -1 ||
 711                          (offset + size > monitorstart &&
 712                           (monitorend == -1 || offset <= monitorend))))) {
 713                 gettimeofday(&t, NULL);
 714                 prt("       %lu.%06lu mmap done\n", t.tv_sec, t.tv_usec);
 715         }
 716         memcpy(temp_buf, p + pg_offset, size);
 717         if (!quiet && (debug > 1 &&
 718                         (monitorstart == -1 ||
 719                          (offset + size > monitorstart &&
 720                           (monitorend == -1 || offset <= monitorend))))) {
 721                 gettimeofday(&t, NULL);
 722                 prt("       %lu.%06lu memcpy done\n", t.tv_sec, t.tv_usec);
 723         }
 724         if (munmap(p, map_size) != 0) {
 725                 prterr("domapread: munmap");
 726                 report_failure(191);
 727         }
 728         if (!quiet && (debug > 1 &&
 729                         (monitorstart == -1 ||
 730                          (offset + size > monitorstart &&
 731                           (monitorend == -1 || offset <= monitorend))))) {
 732                 gettimeofday(&t, NULL);
 733                 prt("       %lu.%06lu munmap done\n", t.tv_sec, t.tv_usec);
 734         }
 735
 736         check_buffers(offset, size);
 737 }
 738
 739
 740 void
 741 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 742 {
 743         while (size--) {
 744                 good_buf[offset] = testcalls % 256;
 745                 if (offset % 2)
 746                         good_buf[offset] += original_buf[offset];
 747                 offset++;
 748         }
 749 }
 750
 751
 752 void
 753 dowrite(unsigned offset, unsigned size)
 754 {
 755         struct timeval t;
 756         off_t ret;
 757         unsigned iret;
 758         struct test_file *tf = get_tf();
 759         int fd = tf->fd;
 760
 761         offset -= offset % writebdy;
 762         if (o_direct)
 763                 size -= size % writebdy;
 764         gettimeofday(&t, NULL);
 765         if (size == 0) {
 766                 if (!quiet && testcalls > simulatedopcount && !o_direct)
 767                         prt("skipping zero size write\n");
 768                 log4(OP_SKIPPED, OP_WRITE, offset, size, &t, tf);
 769                 return;
 770         }
 771
 772         log4(OP_WRITE, offset, size, file_size, &t, tf);
 773
 774         gendata(original_buf, good_buf, offset, size);
 775         if (file_size < offset + size) {
 776                 if (file_size < offset)
 777                         memset(good_buf + file_size, '\0', offset - file_size);
 778                 file_size = offset + size;
 779                 if (lite) {
 780                         warn("Lite file size bug in fsx!");
 781                         report_failure(149);
 782                 }
 783         }
 784
 785         if (testcalls <= simulatedopcount)
 786                 return;
 787
 788         output_line(tf, OP_WRITE, offset, size, &t);
 789
 790         ret = lseek(fd, (off_t)offset, SEEK_SET);
 791         if (ret == (off_t)-1) {
 792                 prterr("dowrite: lseek");
 793                 report_failure(150);
 794         }
 795         iret = write(fd, good_buf + offset, size);
 796         if (!quiet && (debug > 1 &&
 797                         (monitorstart == -1 ||
 798                          (offset + size > monitorstart &&
 799                           (monitorend == -1 || offset <= monitorend))))) {
 800                 gettimeofday(&t, NULL);
 801                 prt("       %lu.%06lu write done\n", t.tv_sec, t.tv_usec);
 802         }
 803         if (iret != size) {
 804                 if (iret == -1)
 805                         prterr("dowrite: write");
 806                 else
 807                         prt("short write: 0x%x bytes instead of 0x%x\n",
 808                             iret, size);
 809                 report_failure(151);
 810         }
 811 }
 812
 813
 814 void
 815 domapwrite(unsigned offset, unsigned size)
 816 {
 817         struct timeval t;
 818         unsigned pg_offset;
 819         unsigned map_size;
 820         off_t    cur_filesize;
 821         char    *p;
 822         struct test_file *tf = get_tf();
 823         int fd = tf->fd;
 824
 825         offset -= offset % writebdy;
 826         gettimeofday(&t, NULL);
 827         if (size == 0) {
 828                 if (!quiet && testcalls > simulatedopcount)
 829                         prt("skipping zero size write\n");
 830                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size, &t, tf);
 831                 return;
 832         }
 833         cur_filesize = file_size;
 834
 835         log4(OP_MAPWRITE, offset, size, 0, &t, tf);
 836
 837         gendata(original_buf, good_buf, offset, size);
 838         if (file_size < offset + size) {
 839                 if (file_size < offset)
 840                         memset(good_buf + file_size, '\0', offset - file_size);
 841                 file_size = offset + size;
 842                 if (lite) {
 843                         warn("Lite file size bug in fsx!");
 844                         report_failure(200);
 845                 }
 846         }
 847
 848         if (testcalls <= simulatedopcount)
 849                 return;
 850
 851         output_line(tf, OP_MAPWRITE, offset, size, &t);
 852
 853         if (file_size > cur_filesize) {
 854                 if (ftruncate(fd, file_size) == -1) {
 855                         prterr("domapwrite: ftruncate");
 856                         exit(201);
 857                 }
 858                 if (!quiet && (debug > 1 &&
 859                                (monitorstart == -1 ||
 860                                 (offset + size > monitorstart &&
 861                                  (monitorend == -1 || offset <= monitorend))))) {
 862                         gettimeofday(&t, NULL);
 863                         prt("       %lu.%06lu truncate done\n", t.tv_sec, t.tv_usec);
 864         }
 865         }
 866         pg_offset = offset & page_mask;
 867         map_size  = pg_offset + size;
 868
 869         if ((p = mmap(0, map_size, PROT_READ | PROT_WRITE, MAP_FILE|MAP_SHARED,
 870                       fd, (off_t)(offset - pg_offset))) == MAP_FAILED) {
 871                 prterr("domapwrite: mmap");
 872                 report_failure(202);
 873         }
 874         if (!quiet && (debug > 1 &&
 875                         (monitorstart == -1 ||
 876                          (offset + size > monitorstart &&
 877                           (monitorend == -1 || offset <= monitorend))))) {
 878                 gettimeofday(&t, NULL);
 879                 prt("       %lu.%06lu mmap done\n", t.tv_sec, t.tv_usec);
 880         }
 881         memcpy(p + pg_offset, good_buf + offset, size);
 882         if (!quiet && (debug > 1 &&
 883                         (monitorstart == -1 ||
 884                          (offset + size > monitorstart &&
 885                           (monitorend == -1 || offset <= monitorend))))) {
 886                 gettimeofday(&t, NULL);
 887                 prt("       %lu.%06lu memcpy done\n", t.tv_sec, t.tv_usec);
 888         }
 889         if (msync(p, map_size, 0) != 0) {
 890                 prterr("domapwrite: msync");
 891                 report_failure(203);
 892         }
 893         if (!quiet && (debug > 1 &&
 894                         (monitorstart == -1 ||
 895                          (offset + size > monitorstart &&
 896                           (monitorend == -1 || offset <= monitorend))))) {
 897                 gettimeofday(&t, NULL);
 898                 prt("       %lu.%06lu msync done\n", t.tv_sec, t.tv_usec);
 899         }
 900         if (munmap(p, map_size) != 0) {
 901                 prterr("domapwrite: munmap");
 902                 report_failure(204);
 903         }
 904         if (!quiet && (debug > 1 &&
 905                         (monitorstart == -1 ||
 906                          (offset + size > monitorstart &&
 907                           (monitorend == -1 || offset <= monitorend))))) {
 908                 gettimeofday(&t, NULL);
 909                 prt("       %lu.%06lu munmap done\n", t.tv_sec, t.tv_usec);
 910         }
 911 }
 912
 913
 914 void
 915 dotruncate(unsigned size)
 916 {
 917         struct timeval t;
 918         int oldsize = file_size;
 919         struct test_file *tf = get_tf();
 920         int fd = tf->fd;
 921
 922         size -= size % truncbdy;
 923         gettimeofday(&t, NULL);
 924         if (size > biggest) {
 925                 biggest = size;
 926                 if (!quiet && testcalls > simulatedopcount)
 927                         prt("truncating to largest ever: 0x%x\n", size);
 928         }
 929
 930         log4(OP_TRUNCATE, size, (unsigned)file_size, 0, &t, tf);
 931
 932         if (size > file_size)
 933                 memset(good_buf + file_size, '\0', size - file_size);
 934         file_size = size;
 935
 936         if (testcalls <= simulatedopcount)
 937                 return;
 938
 939         output_line(tf, OP_TRUNCATE, oldsize, size, &t);
 940
 941         if (ftruncate(fd, (off_t)size) == -1) {
 942                 prt("ftruncate1: %x\n", size);
 943                 prterr("dotruncate: ftruncate");
 944                 report_failure(160);
 945         }
 946         if (!quiet && debug > 1) {
 947                 gettimeofday(&t, NULL);
 948                 prt("       %lu.%06lu trunc done\n", t.tv_sec, t.tv_usec);
 949         }
 950 }
 951
 952
 953 void
 954 writefileimage()
 955 {
 956         ssize_t iret;
 957         int fd = get_fd();
 958
 959         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 960                 prterr("writefileimage: lseek");
 961                 report_failure(171);
 962         }
 963         iret = write(fd, good_buf, file_size);
 964         if ((off_t)iret != file_size) {
 965                 if (iret == -1)
 966                         prterr("writefileimage: write");
 967                 else
 968                         prt("short write: 0x%lx bytes instead of 0x%llx\n",
 969                             (unsigned long)iret,
 970                             (unsigned long long)file_size);
 971                 report_failure(172);
 972         }
 973         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 974                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
 975                 prterr("writefileimage: ftruncate");
 976                 report_failure(173);
 977         }
 978 }
 979
 980
 981 void
 982 docloseopen(void)
 983 {
 984         struct timeval t;
 985         struct test_file *tf = get_tf();
 986
 987         if (testcalls <= simulatedopcount)
 988                 return;
 989
 990         gettimeofday(&t, NULL);
 991         log4(OP_CLOSEOPEN, file_size, (unsigned)file_size, 0, &t, tf);
 992
 993         if (debug)
 994                 prt("%06lu %lu.%06lu close/open\n", testcalls, t.tv_sec,
 995                     t.tv_usec);
 996         if (close(tf->fd)) {
 997                 prterr("docloseopen: close");
 998                 report_failure(180);
 999         }
1000         if (!quiet && debug > 1) {
1001                 gettimeofday(&t, NULL);
1002                 prt("       %lu.%06lu close done\n", t.tv_sec, t.tv_usec);
1003         }
1004         tf->fd = open(tf->path, O_RDWR|o_direct, 0);
1005         if (tf->fd < 0) {
1006                 prterr("docloseopen: open");
1007                 report_failure(181);
1008         }
1009         if (!quiet && debug > 1) {
1010                 gettimeofday(&t, NULL);
1011                 prt("       %lu.%06lu open done\n", t.tv_sec, t.tv_usec);
1012         }
1013 }
1014
1015
1016 void
1017 test(void)
1018 {
1019         unsigned long   offset;
1020         unsigned long   size = maxoplen;
1021         unsigned long   rv = random();
1022         unsigned long   op = rv % (3 + !lite + mapped_writes);
1023
1024         /* turn off the map read if necessary */
1025
1026         if (op == 2 && !mapped_reads)
1027             op = 0;
1028
1029         if (simulatedopcount > 0 && testcalls == simulatedopcount)
1030                 writefileimage();
1031
1032         testcalls++;
1033
1034         if (debugstart > 0 && testcalls >= debugstart)
1035                 debug = 1;
1036
1037         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
1038                 prt("%lu...\n", testcalls);
1039
1040         /*
1041          * READ:        op = 0
1042          * WRITE:       op = 1
1043          * MAPREAD:     op = 2
1044          * TRUNCATE:    op = 3
1045          * MAPWRITE:    op = 3 or 4
1046          */
1047         if (lite ? 0 : op == 3 && (style & 1) == 0) /* vanilla truncate? */
1048                 dotruncate(random() % maxfilelen);
1049         else {
1050                 if (randomoplen)
1051                         size = random() % (maxoplen+1);
1052                 if (lite ? 0 : op == 3)
1053                         dotruncate(size);
1054                 else {
1055                         offset = random();
1056                         if (op == 1 || op == (lite ? 3 : 4)) {
1057                                 offset %= maxfilelen;
1058                                 if (offset + size > maxfilelen)
1059                                         size = maxfilelen - offset;
1060                                 if (op != 1)
1061                                         domapwrite(offset, size);
1062                                 else
1063                                         dowrite(offset, size);
1064                         } else {
1065                                 if (file_size)
1066                                         offset %= file_size;
1067                                 else
1068                                         offset = 0;
1069                                 if (offset + size > file_size)
1070                                         size = file_size - offset;
1071                                 if (op != 0)
1072                                         domapread(offset, size);
1073                                 else
1074                                         doread(offset, size);
1075                         }
1076                 }
1077         }
1078         if (sizechecks && testcalls > simulatedopcount)
1079                 check_size();
1080         if (closeprob && (rv >> 3) < (1 << 28) / closeprob)
1081                 docloseopen();
1082 }
1083
1084
1085 void
1086 cleanup(sig)
1087         int     sig;
1088 {
1089         if (sig)
1090                 prt("signal %d\n", sig);
1091         prt("testcalls = %lu\n", testcalls);
1092         exit(sig);
1093 }
1094
1095
1096 void
1097 usage(void)
1098 {
1099         fprintf(stdout, "usage: %s",
1100                 "fsx [-dnqLOW] [-b opnum] [-c Prob] [-l flen] [-m "
1101 "start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t "
1102 "truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed] "
1103 "[ -I random|rotate ] fname [additional paths to fname..]\n"
1104 "       -b opnum: beginning operation number (default 1)\n"
1105 "       -c P: 1 in P chance of file close+open at each op (default infinity)\n"
1106 "       -d: debug output for all operations [-d -d = more debugging]\n"
1107 "       -l flen: the upper bound on file size (default 262144)\n"
1108 "       -m startop:endop: monitor (print debug output) specified byte rang"
1109 "(default 0:infinity)\n"
1110 "       -n: no verifications of file size\n"
1111 "       -o oplen: the upper bound on operation size (default 65536)\n"
1112 "       -p progressinterval: debug output at specified operation interval\n"
1113 "       -q: quieter operation\n"
1114 "       -r readbdy: 4096 would make reads page aligned (default 1)\n"
1115 "       -s style: 1 gives smaller truncates (default 0)\n"
1116 "       -t truncbdy: 4096 would make truncates page aligned (default 1)\n"
1117 "       -w writebdy: 4096 would make writes page aligned (default 1)\n"
1118 "       -D startingop: debug output starting at specified operation\n"
1119 "       -L: fsxLite - no file creations & no file size changes\n"
1120 "       -N numops: total # operations to do (default infinity)\n"
1121 "       -O: use oplen (see -o flag) for every op (default random)\n"
1122 "       -P: save .fsxlog and .fsxgood files in dirpath (default ./)\n"
1123 "       -S seed: for random # generator (default 1) 0 gets timestamp\n"
1124 "       -W: mapped write operations DISabled\n"
1125 "       -R: read() system calls only (mapped reads disabled)\n"
1126 "       -Z: O_DIRECT (use -R, -W, -r and -w too)\n"
1127 "       -I: When multiple paths to the file are given each operation uses\n"
1128 "           a different path.  Iterate through them in order with 'rotate'\n"
1129 "           or chose then at 'random'.  (defaults to random)\n"
1130 "       fname: this filename is REQUIRED (no default)\n");
1131         exit(90);
1132 }
1133
1134
1135 int
1136 getnum(char *s, char **e)
1137 {
1138         int ret = -1;
1139
1140         *e = (char *) 0;
1141         ret = strtol(s, e, 0);
1142         if (*e)
1143                 switch (**e) {
1144                 case 'b':
1145                 case 'B':
1146                         ret *= 512;
1147                         *e = *e + 1;
1148                         break;
1149                 case 'k':
1150                 case 'K':
1151                         ret *= 1024;
1152                         *e = *e + 1;
1153                         break;
1154                 case 'm':
1155                 case 'M':
1156                         ret *= 1024*1024;
1157                         *e = *e + 1;
1158                         break;
1159                 case 'w':
1160                 case 'W':
1161                         ret *= 4;
1162                         *e = *e + 1;
1163                         break;
1164                 }
1165         return (ret);
1166 }
1167
1168 int
1169 main(int argc, char **argv)
1170 {
1171         int     i, style, ch;
1172         char    *endp;
1173         int  dirpath = 0;
1174
1175         goodfile[0] = 0;
1176         logfile[0] = 0;
1177
1178         page_size = getpagesize();
1179         page_mask = page_size - 1;
1180
1181         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
1182
1183         while ((ch = getopt(argc, argv,
1184                                 "b:c:dl:m:no:p:qr:s:t:w:D:I:LN:OP:RS:WZ"))
1185                != EOF)
1186                 switch (ch) {
1187                 case 'b':
1188                         simulatedopcount = getnum(optarg, &endp);
1189                         if (!quiet)
1190                                 fprintf(stdout, "Will begin at operation"
1191                                         "%ld\n",
1192                                         simulatedopcount);
1193                         if (simulatedopcount == 0)
1194                                 usage();
1195                         simulatedopcount -= 1;
1196                         break;
1197                 case 'c':
1198                         closeprob = getnum(optarg, &endp);
1199                         if (!quiet)
1200                                 fprintf(stdout,
1201                                         "Chance of close/open is 1 in %d\n",
1202                                         closeprob);
1203                         if (closeprob <= 0)
1204                                 usage();
1205                         break;
1206                 case 'd':
1207                         debug++;
1208                         break;
1209                 case 'l':
1210                         maxfilelen = getnum(optarg, &endp);
1211                         if (maxfilelen <= 0)
1212                                 usage();
1213                         break;
1214                 case 'm':
1215                         monitorstart = getnum(optarg, &endp);
1216                         if (monitorstart < 0)
1217                                 usage();
1218                         if (!endp || *endp++ != ':')
1219                                 usage();
1220                         monitorend = getnum(endp, &endp);
1221                         if (monitorend < 0)
1222                                 usage();
1223                         if (monitorend == 0)
1224                                 monitorend = -1; /* aka infinity */
1225                         debug = 1;
1226                 case 'n':
1227                         sizechecks = 0;
1228                         break;
1229                 case 'o':
1230                         maxoplen = getnum(optarg, &endp);
1231                         if (maxoplen <= 0)
1232                                 usage();
1233                         break;
1234                 case 'p':
1235                         progressinterval = getnum(optarg, &endp);
1236                         if (progressinterval < 0)
1237                                 usage();
1238                         break;
1239                 case 'q':
1240                         quiet = 1;
1241                         break;
1242                 case 'r':
1243                         readbdy = getnum(optarg, &endp);
1244                         if (readbdy <= 0)
1245                                 usage();
1246                         break;
1247                 case 's':
1248                         style = getnum(optarg, &endp);
1249                         if (style < 0 || style > 1)
1250                                 usage();
1251                         break;
1252                 case 't':
1253                         truncbdy = getnum(optarg, &endp);
1254                         if (truncbdy <= 0)
1255                                 usage();
1256                         break;
1257                 case 'w':
1258                         writebdy = getnum(optarg, &endp);
1259                         if (writebdy <= 0)
1260                                 usage();
1261                         break;
1262                 case 'D':
1263                         debugstart = getnum(optarg, &endp);
1264                         if (debugstart < 1)
1265                                 usage();
1266                         break;
1267                 case 'I':
1268                         assign_fd_policy(optarg);
1269                         break;
1270                 case 'L':
1271                         lite = 1;
1272                         break;
1273                 case 'N':
1274                         numops = getnum(optarg, &endp);
1275                         if (numops < 0)
1276                                 usage();
1277                         break;
1278                 case 'O':
1279                         randomoplen = 0;
1280                         break;
1281                 case 'P':
1282                         strncpy(goodfile, optarg, sizeof(goodfile) - 1);
1283                         strcat(goodfile, "/");
1284                         strncpy(logfile, optarg, sizeof(logfile) - 1);
1285                         strcat(logfile, "/");
1286                         dirpath = 1;
1287                         break;
1288                 case 'R':
1289                         mapped_reads = 0;
1290                         break;
1291                 case 'S':
1292                         seed = getnum(optarg, &endp);
1293                         if (seed == 0)
1294                                 seed = time(0) % 10000;
1295                         if (!quiet)
1296                                 fprintf(stdout, "Seed set to %d\n", seed);
1297                         if (seed < 0)
1298                                 usage();
1299                         break;
1300                 case 'W':
1301                         mapped_writes = 0;
1302                         if (!quiet)
1303                                 fprintf(stdout, "mapped writes DISABLED\n");
1304                         break;
1305                 case 'Z':
1306                         o_direct = O_DIRECT;
1307                         break;
1308
1309                 default:
1310                         usage();
1311                         /* NOTREACHED */
1312                 }
1313         argc -= optind;
1314         argv += optind;
1315         if (argc < 1)
1316                 usage();
1317         fname = argv[0];
1318
1319         signal(SIGHUP,  cleanup);
1320         signal(SIGINT,  cleanup);
1321         signal(SIGPIPE, cleanup);
1322         signal(SIGALRM, cleanup);
1323         signal(SIGTERM, cleanup);
1324         signal(SIGXCPU, cleanup);
1325         signal(SIGXFSZ, cleanup);
1326         signal(SIGVTALRM,       cleanup);
1327         signal(SIGUSR1, cleanup);
1328         signal(SIGUSR2, cleanup);
1329
1330         initstate(seed, state, 256);
1331         setstate(state);
1332
1333         open_test_files(argv, argc);
1334
1335         strncat(goodfile, dirpath ? my_basename(fname) : fname, 256);
1336         strcat (goodfile, ".fsxgood");
1337         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1338         if (fsxgoodfd < 0) {
1339                 prterr(goodfile);
1340                 exit(92);
1341         }
1342         strncat(logfile, dirpath ? my_basename(fname) : fname, 256);
1343         strcat (logfile, ".fsxlog");
1344         fsxlogf = fopen(logfile, "w");
1345         if (fsxlogf == NULL) {
1346                 prterr(logfile);
1347                 exit(93);
1348         }
1349         if (lite) {
1350                 off_t ret;
1351                 int fd = get_fd();
1352                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1353                 if (file_size == (off_t)-1) {
1354                         prterr(fname);
1355                         warn("main: lseek eof");
1356                         exit(94);
1357                 }
1358                 ret = lseek(fd, (off_t)0, SEEK_SET);
1359                 if (ret == (off_t)-1) {
1360                         prterr(fname);
1361                         warn("main: lseek 0");
1362                         exit(95);
1363                 }
1364         }
1365         original_buf = (char *) malloc(maxfilelen);
1366         for (i = 0; i < maxfilelen; i++)
1367                 original_buf[i] = random() % 256;
1368         if (o_direct) {
1369                 int ret;
1370
1371                 ret = posix_memalign((void **)&good_buf, writebdy, maxfilelen);
1372                 if (ret) {
1373                         prt("main: posix_memalign failed: %s\n", strerror(ret));
1374                         exit(96);
1375                 }
1376
1377                 ret = posix_memalign((void **)&temp_buf, readbdy, maxoplen);
1378                 if (ret) {
1379                         prt("main: posix_memalign failed: %s\n", strerror(ret));
1380                         exit(97);
1381                 }
1382         } else {
1383                 good_buf = malloc(maxfilelen);
1384                 if (!good_buf) {
1385                         prt("malloc failed.\n");
1386                         exit(98);
1387                 }
1388
1389                 temp_buf = malloc(maxoplen);
1390                 if (!temp_buf) {
1391                         prt("malloc failed.\n");
1392                         exit(99);
1393                 }
1394         }
1395         memset(good_buf, 0, maxfilelen);
1396         memset(temp_buf, 0, maxoplen);
1397
1398         if (lite) {     /* zero entire existing file */
1399                 ssize_t written;
1400                 int fd = get_fd();
1401
1402                 written = write(fd, good_buf, (size_t)maxfilelen);
1403                 if (written != maxfilelen) {
1404                         if (written == -1) {
1405                                 prterr(fname);
1406                                 warn("main: error on write");
1407                         } else
1408                                 warn("main: short write, 0x%x bytes instead"
1409                                         "of 0x%x\n",
1410                                      (unsigned)written, maxfilelen);
1411                         exit(98);
1412                 }
1413         } else
1414                 check_trunc_hack();
1415
1416         while (numops == -1 || numops--)
1417                 test();
1418
1419         close_test_files();
1420         prt("All operations completed A-OK!\n");
1421
1422         exit(0);
1423         return 0;
1424 }