ltp/fsx.c

   1 /*
   2  *      Copyright (C) 1991, NeXT Computer, Inc.  All Rights Reserverd.
   3  *
   4  *      File:   fsx.c
   5  *      Author: Avadis Tevanian, Jr.
   6  *
   7  *      File system exerciser.
   8  *
   9  *      Rewritten 8/98 by Conrad Minshall.
  10  *
  11  *      Small changes to work under Linux -- davej.
  12  *
  13  *      Checks for mmap last-page zero fill.
  14  */
  15
  16 #include "global.h"
  17
  18 #include <limits.h>
  19 #include <time.h>
  20 #include <strings.h>
  21 #include <sys/file.h>
  22 #include <sys/mman.h>
  23 #ifdef HAVE_ERR_H
  24 #include <err.h>
  25 #endif
  26 #include <signal.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <stdarg.h>
  31 #include <errno.h>
  32 #ifdef AIO
  33 #include <libaio.h>
  34 #endif
  35 #ifdef FALLOCATE
  36 #include <linux/falloc.h>
  37 #endif
  38
  39 #ifndef MAP_FILE
  40 # define MAP_FILE 0
  41 #endif
  42
  43 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  44
  45 /*
  46  *      A log entry is an operation and a bunch of arguments.
  47  */
  48
  49 struct log_entry {
  50         int     operation;
  51         int     args[3];
  52 };
  53
  54 #define LOGSIZE 1000
  55
  56 struct log_entry        oplog[LOGSIZE]; /* the log */
  57 int                     logptr = 0;     /* current position in log */
  58 int                     logcount = 0;   /* total ops */
  59
  60 /*
  61  *      Define operations
  62  */
  63
  64 #define OP_READ         1
  65 #define OP_WRITE        2
  66 #define OP_TRUNCATE     3
  67 #define OP_CLOSEOPEN    4
  68 #define OP_MAPREAD      5
  69 #define OP_MAPWRITE     6
  70 #define OP_SKIPPED      7
  71 #define OP_FALLOCATE    8
  72
  73 #undef PAGE_SIZE
  74 #define PAGE_SIZE       getpagesize()
  75 #undef PAGE_MASK
  76 #define PAGE_MASK       (PAGE_SIZE - 1)
  77
  78 char    *original_buf;                  /* a pointer to the original data */
  79 char    *good_buf;                      /* a pointer to the correct data */
  80 char    *temp_buf;                      /* a pointer to the current data */
  81 char    *fname;                         /* name of our test file */
  82 int     fd;                             /* fd for our test file */
  83
  84 off_t           file_size = 0;
  85 off_t           biggest = 0;
  86 char            state[256];
  87 unsigned long   testcalls = 0;          /* calls to function "test" */
  88
  89 unsigned long   simulatedopcount = 0;   /* -b flag */
  90 int     closeprob = 0;                  /* -c flag */
  91 int     debug = 0;                      /* -d flag */
  92 unsigned long   debugstart = 0;         /* -D flag */
  93 int     flush = 0;                      /* -f flag */
  94 int     do_fsync = 0;                   /* -y flag */
  95 unsigned long   maxfilelen = 256 * 1024;        /* -l flag */
  96 int     sizechecks = 1;                 /* -n flag disables them */
  97 int     maxoplen = 64 * 1024;           /* -o flag */
  98 int     quiet = 0;                      /* -q flag */
  99 unsigned long progressinterval = 0;     /* -p flag */
 100 int     readbdy = 1;                    /* -r flag */
 101 int     style = 0;                      /* -s flag */
 102 int     prealloc = 0;                   /* -x flag */
 103 int     truncbdy = 1;                   /* -t flag */
 104 int     writebdy = 1;                   /* -w flag */
 105 long    monitorstart = -1;              /* -m flag */
 106 long    monitorend = -1;                /* -m flag */
 107 int     lite = 0;                       /* -L flag */
 108 long    numops = -1;                    /* -N flag */
 109 int     randomoplen = 1;                /* -O flag disables it */
 110 int     seed = 1;                       /* -S flag */
 111 int     mapped_writes = 1;              /* -W flag disables */
 112 int     fallocate_calls = 1;            /* -F flag disables */
 113 int     mapped_reads = 1;               /* -R flag disables it */
 114 int     fsxgoodfd = 0;
 115 int     o_direct;                       /* -Z */
 116 int     aio = 0;
 117
 118 int page_size;
 119 int page_mask;
 120 int mmap_mask;
 121 #ifdef AIO
 122 int aio_rw(int rw, int fd, char *buf, unsigned len, unsigned offset);
 123 #define READ 0
 124 #define WRITE 1
 125 #define fsxread(a,b,c,d)        aio_rw(READ, a,b,c,d)
 126 #define fsxwrite(a,b,c,d)       aio_rw(WRITE, a,b,c,d)
 127 #else
 128 #define fsxread(a,b,c,d)        read(a,b,c)
 129 #define fsxwrite(a,b,c,d)       write(a,b,c)
 130 #endif
 131
 132 FILE *  fsxlogf = NULL;
 133 int badoff = -1;
 134 int closeopen = 0;
 135
 136 static void *round_up(void *ptr, unsigned long align, unsigned long offset)
 137 {
 138         unsigned long ret = (unsigned long)ptr;
 139
 140         ret = ((ret + align - 1) & ~(align - 1));
 141         ret += offset;
 142         return (void *)ret;
 143 }
 144
 145 void
 146 vwarnc(int code, const char *fmt, va_list ap) {
 147   fprintf(stderr, "fsx: ");
 148   if (fmt != NULL) {
 149         vfprintf(stderr, fmt, ap);
 150         fprintf(stderr, ": ");
 151   }
 152   fprintf(stderr, "%s\n", strerror(code));
 153 }
 154
 155 void
 156 warn(const char * fmt, ...)  {
 157         va_list ap;
 158         va_start(ap, fmt);
 159         vwarnc(errno, fmt, ap);
 160         va_end(ap);
 161 }
 162
 163 #define BUF_SIZE 1024
 164
 165 void
 166 prt(char *fmt, ...)
 167 {
 168         va_list args;
 169         char buffer[BUF_SIZE];
 170
 171         va_start(args, fmt);
 172         vsnprintf(buffer, BUF_SIZE, fmt, args);
 173         va_end(args);
 174         fprintf(stdout, buffer);
 175         if (fsxlogf)
 176                 fprintf(fsxlogf, buffer);
 177 }
 178
 179 void
 180 prterr(char *prefix)
 181 {
 182         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 183 }
 184
 185
 186 void
 187 log4(int operation, int arg0, int arg1, int arg2)
 188 {
 189         struct log_entry *le;
 190
 191         le = &oplog[logptr];
 192         le->operation = operation;
 193         if (closeopen)
 194                 le->operation = ~ le->operation;
 195         le->args[0] = arg0;
 196         le->args[1] = arg1;
 197         le->args[2] = arg2;
 198         logptr++;
 199         logcount++;
 200         if (logptr >= LOGSIZE)
 201                 logptr = 0;
 202 }
 203
 204
 205 void
 206 logdump(void)
 207 {
 208         int     i, count, down;
 209         struct log_entry        *lp;
 210         char *falloc_type[3] = {"PAST_EOF", "EXTENDING", "INTERIOR"};
 211
 212         prt("LOG DUMP (%d total operations):\n", logcount);
 213         if (logcount < LOGSIZE) {
 214                 i = 0;
 215                 count = logcount;
 216         } else {
 217                 i = logptr;
 218                 count = LOGSIZE;
 219         }
 220         for ( ; count > 0; count--) {
 221                 int opnum;
 222
 223                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 224                 prt("%d(%d mod 256): ", opnum, opnum%256);
 225                 lp = &oplog[i];
 226                 if ((closeopen = lp->operation < 0))
 227                         lp->operation = ~ lp->operation;
 228
 229                 switch (lp->operation) {
 230                 case OP_MAPREAD:
 231                         prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
 232                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 233                             lp->args[1]);
 234                         if (badoff >= lp->args[0] && badoff <
 235                                                      lp->args[0] + lp->args[1])
 236                                 prt("\t***RRRR***");
 237                         break;
 238                 case OP_MAPWRITE:
 239                         prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
 240                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 241                             lp->args[1]);
 242                         if (badoff >= lp->args[0] && badoff <
 243                                                      lp->args[0] + lp->args[1])
 244                                 prt("\t******WWWW");
 245                         break;
 246                 case OP_READ:
 247                         prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
 248                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 249                             lp->args[1]);
 250                         if (badoff >= lp->args[0] &&
 251                             badoff < lp->args[0] + lp->args[1])
 252                                 prt("\t***RRRR***");
 253                         break;
 254                 case OP_WRITE:
 255                         prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
 256                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 257                             lp->args[1]);
 258                         if (lp->args[0] > lp->args[2])
 259                                 prt(" HOLE");
 260                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 261                                 prt(" EXTEND");
 262                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
 263                             badoff < lp->args[0] + lp->args[1])
 264                                 prt("\t***WWWW");
 265                         break;
 266                 case OP_TRUNCATE:
 267                         down = lp->args[0] < lp->args[1];
 268                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 269                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
 270                         if (badoff >= lp->args[!down] &&
 271                             badoff < lp->args[!!down])
 272                                 prt("\t******WWWW");
 273                         break;
 274                 case OP_FALLOCATE:
 275                         /* 0: offset 1: length 2: where alloced */
 276                         prt("FALLOCATE %s\tfrom 0x%x to 0x%x",
 277                             falloc_type[lp->args[2]], lp->args[0], lp->args[0] + lp->args[1]);
 278                         if (badoff >= lp->args[0] &&
 279                             badoff < lp->args[0] + lp->args[1])
 280                                 prt("\t******FFFF");
 281                         break;
 282                 case OP_SKIPPED:
 283                         prt("SKIPPED (no operation)");
 284                         break;
 285                 default:
 286                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 287                             lp->operation);
 288                 }
 289                 if (closeopen)
 290                         prt("\n\t\tCLOSE/OPEN");
 291                 prt("\n");
 292                 i++;
 293                 if (i == LOGSIZE)
 294                         i = 0;
 295         }
 296 }
 297
 298
 299 void
 300 save_buffer(char *buffer, off_t bufferlength, int fd)
 301 {
 302         off_t ret;
 303         ssize_t byteswritten;
 304
 305         if (fd <= 0 || bufferlength == 0)
 306                 return;
 307
 308         if (bufferlength > SSIZE_MAX) {
 309                 prt("fsx flaw: overflow in save_buffer\n");
 310                 exit(67);
 311         }
 312         if (lite) {
 313                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 314                 if (size_by_seek == (off_t)-1)
 315                         prterr("save_buffer: lseek eof");
 316                 else if (bufferlength > size_by_seek) {
 317                         warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
 318                              (unsigned long long)bufferlength);
 319                         bufferlength = size_by_seek;
 320                 }
 321         }
 322
 323         ret = lseek(fd, (off_t)0, SEEK_SET);
 324         if (ret == (off_t)-1)
 325                 prterr("save_buffer: lseek 0");
 326
 327         byteswritten = write(fd, buffer, (size_t)bufferlength);
 328         if (byteswritten != bufferlength) {
 329                 if (byteswritten == -1)
 330                         prterr("save_buffer write");
 331                 else
 332                         warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",
 333                              (unsigned)byteswritten,
 334                              (unsigned long long)bufferlength);
 335         }
 336 }
 337
 338
 339 void
 340 report_failure(int status)
 341 {
 342         logdump();
 343
 344         if (fsxgoodfd) {
 345                 if (good_buf) {
 346                         save_buffer(good_buf, file_size, fsxgoodfd);
 347                         prt("Correct content saved for comparison\n");
 348                         prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
 349                             fname, fname);
 350                 }
 351                 close(fsxgoodfd);
 352         }
 353         exit(status);
 354 }
 355
 356
 357 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 358                                         *(((unsigned char *)(cp)) + 1)))
 359
 360 void
 361 check_buffers(unsigned offset, unsigned size)
 362 {
 363         unsigned char c, t;
 364         unsigned i = 0;
 365         unsigned n = 0;
 366         unsigned op = 0;
 367         unsigned bad = 0;
 368
 369         if (memcmp(good_buf + offset, temp_buf, size) != 0) {
 370                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x, fname = %s\n",
 371                     offset, size, fname);
 372                 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
 373                 while (size > 0) {
 374                         c = good_buf[offset];
 375                         t = temp_buf[i];
 376                         if (c != t) {
 377                                 if (n < 16) {
 378                                         bad = short_at(&temp_buf[i]);
 379                                         prt("0x%5x\t0x%04x\t0x%04x", offset,
 380                                             short_at(&good_buf[offset]), bad);
 381                                         op = temp_buf[offset & 1 ? i+1 : i];
 382                                         prt("\t0x%5x\n", n);
 383                                         if (op)
 384                                                 prt("operation# (mod 256) for "
 385                                                   "the bad data may be %u\n",
 386                                                 ((unsigned)op & 0xff));
 387                                         else
 388                                                 prt("operation# (mod 256) for "
 389                                                   "the bad data unknown, check"
 390                                                   " HOLE and EXTEND ops\n");
 391                                 }
 392                                 n++;
 393                                 badoff = offset;
 394                         }
 395                         offset++;
 396                         i++;
 397                         size--;
 398                 }
 399                 report_failure(110);
 400         }
 401 }
 402
 403
 404 void
 405 check_size(void)
 406 {
 407         struct stat     statbuf;
 408         off_t   size_by_seek;
 409
 410         if (fstat(fd, &statbuf)) {
 411                 prterr("check_size: fstat");
 412                 statbuf.st_size = -1;
 413         }
 414         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 415         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 416                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 417                     (unsigned long long)file_size,
 418                     (unsigned long long)statbuf.st_size,
 419                     (unsigned long long)size_by_seek);
 420                 report_failure(120);
 421         }
 422 }
 423
 424
 425 void
 426 check_trunc_hack(void)
 427 {
 428         struct stat statbuf;
 429
 430         ftruncate(fd, (off_t)0);
 431         ftruncate(fd, (off_t)100000);
 432         fstat(fd, &statbuf);
 433         if (statbuf.st_size != (off_t)100000) {
 434                 prt("no extend on truncate! not posix!\n");
 435                 exit(130);
 436         }
 437         ftruncate(fd, 0);
 438 }
 439
 440 void
 441 doflush(unsigned offset, unsigned size)
 442 {
 443         unsigned pg_offset;
 444         unsigned map_size;
 445         char    *p;
 446
 447         if (o_direct == O_DIRECT)
 448                 return;
 449
 450         pg_offset = offset & mmap_mask;
 451         map_size  = pg_offset + size;
 452
 453         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 454                               MAP_FILE | MAP_SHARED, fd,
 455                               (off_t)(offset - pg_offset))) == (char *)-1) {
 456                 prterr("doflush: mmap");
 457                 report_failure(202);
 458         }
 459         if (msync(p, map_size, MS_INVALIDATE) != 0) {
 460                 prterr("doflush: msync");
 461                 report_failure(203);
 462         }
 463         if (munmap(p, map_size) != 0) {
 464                 prterr("doflush: munmap");
 465                 report_failure(204);
 466         }
 467 }
 468
 469 void
 470 doread(unsigned offset, unsigned size)
 471 {
 472         off_t ret;
 473         unsigned iret;
 474
 475         offset -= offset % readbdy;
 476         if (o_direct)
 477                 size -= size % readbdy;
 478         if (size == 0) {
 479                 if (!quiet && testcalls > simulatedopcount && !o_direct)
 480                         prt("skipping zero size read\n");
 481                 log4(OP_SKIPPED, OP_READ, offset, size);
 482                 return;
 483         }
 484         if (size + offset > file_size) {
 485                 if (!quiet && testcalls > simulatedopcount)
 486                         prt("skipping seek/read past end of file\n");
 487                 log4(OP_SKIPPED, OP_READ, offset, size);
 488                 return;
 489         }
 490
 491         log4(OP_READ, offset, size, 0);
 492
 493         if (testcalls <= simulatedopcount)
 494                 return;
 495
 496         if (!quiet &&
 497                 ((progressinterval && testcalls % progressinterval == 0)  ||
 498                 (debug &&
 499                        (monitorstart == -1 ||
 500                         (offset + size > monitorstart &&
 501                         (monitorend == -1 || offset <= monitorend))))))
 502                 prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 503                     offset, offset + size - 1, size);
 504         ret = lseek(fd, (off_t)offset, SEEK_SET);
 505         if (ret == (off_t)-1) {
 506                 prterr("doread: lseek");
 507                 report_failure(140);
 508         }
 509         iret = fsxread(fd, temp_buf, size, offset);
 510         if (iret != size) {
 511                 if (iret == -1)
 512                         prterr("doread: read");
 513                 else
 514                         prt("short read: 0x%x bytes instead of 0x%x\n",
 515                             iret, size);
 516                 report_failure(141);
 517         }
 518         check_buffers(offset, size);
 519 }
 520
 521
 522 void
 523 check_eofpage(char *s, unsigned offset, char *p, int size)
 524 {
 525         unsigned long last_page, should_be_zero;
 526
 527         if (offset + size <= (file_size & ~page_mask))
 528                 return;
 529         /*
 530          * we landed in the last page of the file
 531          * test to make sure the VM system provided 0's
 532          * beyond the true end of the file mapping
 533          * (as required by mmap def in 1996 posix 1003.1)
 534          */
 535         last_page = ((unsigned long)p + (offset & page_mask) + size) & ~page_mask;
 536
 537         for (should_be_zero = last_page + (file_size & page_mask);
 538              should_be_zero < last_page + page_size;
 539              should_be_zero++)
 540                 if (*(char *)should_be_zero) {
 541                         prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
 542                             s, file_size - 1, should_be_zero & page_mask,
 543                             short_at(should_be_zero));
 544                         report_failure(205);
 545                 }
 546 }
 547
 548
 549 void
 550 domapread(unsigned offset, unsigned size)
 551 {
 552         unsigned pg_offset;
 553         unsigned map_size;
 554         char    *p;
 555
 556         offset -= offset % readbdy;
 557         if (size == 0) {
 558                 if (!quiet && testcalls > simulatedopcount)
 559                         prt("skipping zero size read\n");
 560                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 561                 return;
 562         }
 563         if (size + offset > file_size) {
 564                 if (!quiet && testcalls > simulatedopcount)
 565                         prt("skipping seek/read past end of file\n");
 566                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 567                 return;
 568         }
 569
 570         log4(OP_MAPREAD, offset, size, 0);
 571
 572         if (testcalls <= simulatedopcount)
 573                 return;
 574
 575         if (!quiet &&
 576                 ((progressinterval && testcalls % progressinterval == 0) ||
 577                        (debug &&
 578                        (monitorstart == -1 ||
 579                         (offset + size > monitorstart &&
 580                         (monitorend == -1 || offset <= monitorend))))))
 581                 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 582                     offset, offset + size - 1, size);
 583
 584         pg_offset = offset & PAGE_MASK;
 585         map_size  = pg_offset + size;
 586
 587         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_SHARED, fd,
 588                               (off_t)(offset - pg_offset))) == (char *)-1) {
 589                 prterr("domapread: mmap");
 590                 report_failure(190);
 591         }
 592         memcpy(temp_buf, p + pg_offset, size);
 593
 594         check_eofpage("Read", offset, p, size);
 595
 596         if (munmap(p, map_size) != 0) {
 597                 prterr("domapread: munmap");
 598                 report_failure(191);
 599         }
 600
 601         check_buffers(offset, size);
 602 }
 603
 604
 605 void
 606 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 607 {
 608         while (size--) {
 609                 good_buf[offset] = testcalls % 256;
 610                 if (offset % 2)
 611                         good_buf[offset] += original_buf[offset];
 612                 offset++;
 613         }
 614 }
 615
 616
 617 void
 618 dowrite(unsigned offset, unsigned size)
 619 {
 620         off_t ret;
 621         unsigned iret;
 622
 623         offset -= offset % writebdy;
 624         if (o_direct)
 625                 size -= size % writebdy;
 626         if (size == 0) {
 627                 if (!quiet && testcalls > simulatedopcount && !o_direct)
 628                         prt("skipping zero size write\n");
 629                 log4(OP_SKIPPED, OP_WRITE, offset, size);
 630                 return;
 631         }
 632
 633         log4(OP_WRITE, offset, size, file_size);
 634
 635         gendata(original_buf, good_buf, offset, size);
 636         if (file_size < offset + size) {
 637                 if (file_size < offset)
 638                         memset(good_buf + file_size, '\0', offset - file_size);
 639                 file_size = offset + size;
 640                 if (lite) {
 641                         warn("Lite file size bug in fsx!");
 642                         report_failure(149);
 643                 }
 644         }
 645
 646         if (testcalls <= simulatedopcount)
 647                 return;
 648
 649         if (!quiet &&
 650                 ((progressinterval && testcalls % progressinterval == 0) ||
 651                        (debug &&
 652                        (monitorstart == -1 ||
 653                         (offset + size > monitorstart &&
 654                         (monitorend == -1 || offset <= monitorend))))))
 655                 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 656                     offset, offset + size - 1, size);
 657         ret = lseek(fd, (off_t)offset, SEEK_SET);
 658         if (ret == (off_t)-1) {
 659                 prterr("dowrite: lseek");
 660                 report_failure(150);
 661         }
 662         iret = fsxwrite(fd, good_buf + offset, size, offset);
 663         if (iret != size) {
 664                 if (iret == -1)
 665                         prterr("dowrite: write");
 666                 else
 667                         prt("short write: 0x%x bytes instead of 0x%x\n",
 668                             iret, size);
 669                 report_failure(151);
 670         }
 671         if (do_fsync) {
 672                 if (fsync(fd)) {
 673                         prt("fsync() failed: %s\n", strerror(errno));
 674                         report_failure(152);
 675                 }
 676         }
 677         if (flush) {
 678                 doflush(offset, size);
 679         }
 680 }
 681
 682
 683 void
 684 domapwrite(unsigned offset, unsigned size)
 685 {
 686         unsigned pg_offset;
 687         unsigned map_size;
 688         off_t    cur_filesize;
 689         char    *p;
 690
 691         offset -= offset % writebdy;
 692         if (size == 0) {
 693                 if (!quiet && testcalls > simulatedopcount)
 694                         prt("skipping zero size write\n");
 695                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
 696                 return;
 697         }
 698         cur_filesize = file_size;
 699
 700         log4(OP_MAPWRITE, offset, size, 0);
 701
 702         gendata(original_buf, good_buf, offset, size);
 703         if (file_size < offset + size) {
 704                 if (file_size < offset)
 705                         memset(good_buf + file_size, '\0', offset - file_size);
 706                 file_size = offset + size;
 707                 if (lite) {
 708                         warn("Lite file size bug in fsx!");
 709                         report_failure(200);
 710                 }
 711         }
 712
 713         if (testcalls <= simulatedopcount)
 714                 return;
 715
 716         if (!quiet &&
 717                 ((progressinterval && testcalls % progressinterval == 0) ||
 718                        (debug &&
 719                        (monitorstart == -1 ||
 720                         (offset + size > monitorstart &&
 721                         (monitorend == -1 || offset <= monitorend))))))
 722                 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 723                     offset, offset + size - 1, size);
 724
 725         if (file_size > cur_filesize) {
 726                 if (ftruncate(fd, file_size) == -1) {
 727                         prterr("domapwrite: ftruncate");
 728                         exit(201);
 729                 }
 730         }
 731         pg_offset = offset & PAGE_MASK;
 732         map_size  = pg_offset + size;
 733
 734         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 735                               MAP_FILE | MAP_SHARED, fd,
 736                               (off_t)(offset - pg_offset))) == (char *)-1) {
 737                 prterr("domapwrite: mmap");
 738                 report_failure(202);
 739         }
 740         memcpy(p + pg_offset, good_buf + offset, size);
 741         if (msync(p, map_size, 0) != 0) {
 742                 prterr("domapwrite: msync");
 743                 report_failure(203);
 744         }
 745
 746         check_eofpage("Write", offset, p, size);
 747
 748         if (munmap(p, map_size) != 0) {
 749                 prterr("domapwrite: munmap");
 750                 report_failure(204);
 751         }
 752 }
 753
 754
 755 void
 756 dotruncate(unsigned size)
 757 {
 758         int oldsize = file_size;
 759
 760         size -= size % truncbdy;
 761         if (size > biggest) {
 762                 biggest = size;
 763                 if (!quiet && testcalls > simulatedopcount)
 764                         prt("truncating to largest ever: 0x%x\n", size);
 765         }
 766
 767         log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
 768
 769         if (size > file_size)
 770                 memset(good_buf + file_size, '\0', size - file_size);
 771         file_size = size;
 772
 773         if (testcalls <= simulatedopcount)
 774                 return;
 775
 776         if ((progressinterval && testcalls % progressinterval == 0) ||
 777             (debug && (monitorstart == -1 || monitorend == -1 ||
 778                       size <= monitorend)))
 779                 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
 780         if (ftruncate(fd, (off_t)size) == -1) {
 781                 prt("ftruncate1: %x\n", size);
 782                 prterr("dotruncate: ftruncate");
 783                 report_failure(160);
 784         }
 785 }
 786
 787 #ifdef FALLOCATE
 788 /* fallocate is basically a no-op unless extending, then a lot like a truncate */
 789 void
 790 dofallocate(unsigned offset, unsigned length)
 791 {
 792         unsigned end_offset;
 793         int keep_size;
 794
 795         if (length == 0) {
 796                 if (!quiet && testcalls > simulatedopcount)
 797                         prt("skipping zero length fallocate\n");
 798                 log4(OP_SKIPPED, OP_FALLOCATE, offset, length);
 799                 return;
 800         }
 801
 802         keep_size = random() % 2;
 803
 804         end_offset = keep_size ? 0 : offset + length;
 805
 806         if (end_offset > biggest) {
 807                 biggest = end_offset;
 808                 if (!quiet && testcalls > simulatedopcount)
 809                         prt("fallocating to largest ever: 0x%x\n", end_offset);
 810         }
 811
 812         /*
 813          * last arg:
 814          *      1: allocate past EOF
 815          *      2: extending prealloc
 816          *      3: interior prealloc
 817          */
 818         log4(OP_FALLOCATE, offset, length, (end_offset > file_size) ? (keep_size ? 1 : 2) : 3);
 819
 820         if (end_offset > file_size) {
 821                 memset(good_buf + file_size, '\0', end_offset - file_size);
 822                 file_size = end_offset;
 823         }
 824
 825         if (testcalls <= simulatedopcount)
 826                 return;
 827
 828         if ((progressinterval && testcalls % progressinterval == 0) ||
 829             (debug && (monitorstart == -1 || monitorend == -1 ||
 830                       end_offset <= monitorend)))
 831                 prt("%lu falloc\tfrom 0x%x to 0x%x\n", testcalls, offset, length);
 832         if (fallocate(fd, keep_size ? FALLOC_FL_KEEP_SIZE : 0, (loff_t)offset, (loff_t)length) == -1) {
 833                 prt("fallocate: %x to %x\n", offset, length);
 834                 prterr("dofallocate: fallocate");
 835                 report_failure(161);
 836         }
 837 }
 838 #else
 839 void
 840 dofallocate(unsigned offset, unsigned length)
 841 {
 842         return;
 843 }
 844 #endif
 845
 846 void
 847 writefileimage()
 848 {
 849         ssize_t iret;
 850
 851         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 852                 prterr("writefileimage: lseek");
 853                 report_failure(171);
 854         }
 855         iret = write(fd, good_buf, file_size);
 856         if ((off_t)iret != file_size) {
 857                 if (iret == -1)
 858                         prterr("writefileimage: write");
 859                 else
 860                         prt("short write: 0x%x bytes instead of 0x%llx\n",
 861                             iret, (unsigned long long)file_size);
 862                 report_failure(172);
 863         }
 864         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 865                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
 866                 prterr("writefileimage: ftruncate");
 867                 report_failure(173);
 868         }
 869 }
 870
 871
 872 void
 873 docloseopen(void)
 874 {
 875         if (testcalls <= simulatedopcount)
 876                 return;
 877
 878         if (debug)
 879                 prt("%lu close/open\n", testcalls);
 880         if (close(fd)) {
 881                 prterr("docloseopen: close");
 882                 report_failure(180);
 883         }
 884         fd = open(fname, O_RDWR|o_direct, 0);
 885         if (fd < 0) {
 886                 prterr("docloseopen: open");
 887                 report_failure(181);
 888         }
 889 }
 890
 891
 892 void
 893 test(void)
 894 {
 895         unsigned long   offset;
 896         unsigned long   size = maxoplen;
 897         unsigned long   rv = random();
 898         unsigned long   op = rv % (3 + !lite + mapped_writes + fallocate_calls);
 899
 900         /* turn off the map read if necessary */
 901
 902         if (op == 2 && !mapped_reads)
 903             op = 0;
 904
 905         if (simulatedopcount > 0 && testcalls == simulatedopcount)
 906                 writefileimage();
 907
 908         testcalls++;
 909
 910         if (closeprob)
 911                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
 912
 913         if (debugstart > 0 && testcalls >= debugstart)
 914                 debug = 1;
 915
 916         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
 917                 prt("%lu...\n", testcalls);
 918
 919         /*
 920          *                 lite  !lite
 921          * READ:        op = 0     0
 922          * WRITE:       op = 1     1
 923          * MAPREAD:     op = 2     2
 924          * TRUNCATE:    op = -     3
 925          * MAPWRITE:    op = 3     4
 926          * FALLOCATE:   op = -     5
 927          */
 928         if (lite ? 0 : op == 3 && (style & 1) == 0) /* vanilla truncate? */
 929                 dotruncate(random() % maxfilelen);
 930         else {
 931                 if (randomoplen)
 932                         size = random() % (maxoplen+1);
 933
 934                 if (lite ? 0 : op == 3) {
 935                         /* truncate */
 936                         dotruncate(size);
 937                 } else {
 938                         offset = random();
 939                         if (op == 5) {
 940                                 /* fallocate */
 941                                 offset %= maxfilelen;
 942                                 if (offset + size > maxfilelen)
 943                                         size = maxfilelen - offset;
 944                                 dofallocate(offset, size);
 945                         } else if (op == 1 || op == (lite ? 3 : 4)) {
 946                                 /* write / mapwrite */
 947                                 offset %= maxfilelen;
 948                                 if (offset + size > maxfilelen)
 949                                         size = maxfilelen - offset;
 950                                 if (op != 1)
 951                                         domapwrite(offset, size);
 952                                 else
 953                                         dowrite(offset, size);
 954                         } else {
 955                                 /* read / mapread */
 956                                 if (file_size)
 957                                         offset %= file_size;
 958                                 else
 959                                         offset = 0;
 960                                 if (offset + size > file_size)
 961                                         size = file_size - offset;
 962                                 if (op != 0)
 963                                         domapread(offset, size);
 964                                 else
 965                                         doread(offset, size);
 966                         }
 967                 }
 968         }
 969         if (sizechecks && testcalls > simulatedopcount)
 970                 check_size();
 971         if (closeopen)
 972                 docloseopen();
 973 }
 974
 975
 976 void
 977 cleanup(sig)
 978         int     sig;
 979 {
 980         if (sig)
 981                 prt("signal %d\n", sig);
 982         prt("testcalls = %lu\n", testcalls);
 983         exit(sig);
 984 }
 985
 986
 987 void
 988 usage(void)
 989 {
 990         fprintf(stdout, "usage: %s",
 991                 "fsx [-dnqxAFLOWZ] [-b opnum] [-c Prob] [-l flen] [-m start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed] fname\n\
 992         -b opnum: beginning operation number (default 1)\n\
 993         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
 994         -d: debug output for all operations\n\
 995         -f flush and invalidate cache after I/O\n\
 996         -l flen: the upper bound on file size (default 262144)\n\
 997         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
 998         -n: no verifications of file size\n\
 999         -o oplen: the upper bound on operation size (default 65536)\n\
1000         -p progressinterval: debug output at specified operation interval\n\
1001         -q: quieter operation\n\
1002         -r readbdy: 4096 would make reads page aligned (default 1)\n\
1003         -s style: 1 gives smaller truncates (default 0)\n\
1004         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
1005         -w writebdy: 4096 would make writes page aligned (default 1)\n\
1006         -x: preallocate file space before starting, XFS only (default 0)\n\
1007         -y synchronize changes to a file\n"
1008
1009 #ifdef AIO
1010 "       -A: Use the AIO system calls\n"
1011 #endif
1012 "       -D startingop: debug output starting at specified operation\n"
1013 #ifdef FALLOCATE
1014 "       -F: Do not use fallocate (preallocation) calls\n"
1015 #endif
1016 "       -L: fsxLite - no file creations & no file size changes\n\
1017         -N numops: total # operations to do (default infinity)\n\
1018         -O: use oplen (see -o flag) for every op (default random)\n\
1019         -P: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
1020         -S seed: for random # generator (default 1) 0 gets timestamp\n\
1021         -W: mapped write operations DISabled\n\
1022         -R: read() system calls only (mapped reads disabled)\n\
1023         -Z: O_DIRECT (use -R, -W, -r and -w too)\n\
1024         fname: this filename is REQUIRED (no default)\n");
1025         exit(90);
1026 }
1027
1028
1029 int
1030 getnum(char *s, char **e)
1031 {
1032         int ret;
1033
1034         *e = (char *) 0;
1035         ret = strtol(s, e, 0);
1036         if (*e)
1037                 switch (**e) {
1038                 case 'b':
1039                 case 'B':
1040                         ret *= 512;
1041                         *e = *e + 1;
1042                         break;
1043                 case 'k':
1044                 case 'K':
1045                         ret *= 1024;
1046                         *e = *e + 1;
1047                         break;
1048                 case 'm':
1049                 case 'M':
1050                         ret *= 1024*1024;
1051                         *e = *e + 1;
1052                         break;
1053                 case 'w':
1054                 case 'W':
1055                         ret *= 4;
1056                         *e = *e + 1;
1057                         break;
1058                 }
1059         return (ret);
1060 }
1061
1062 #ifdef AIO
1063
1064 #define QSZ     1024
1065 io_context_t    io_ctx;
1066 struct iocb     iocb;
1067
1068 int aio_setup()
1069 {
1070         int ret;
1071         ret = io_queue_init(QSZ, &io_ctx);
1072         if (ret != 0) {
1073                 fprintf(stderr, "aio_setup: io_queue_init failed: %s\n",
1074                         strerror(ret));
1075                 return(-1);
1076         }
1077         return(0);
1078 }
1079
1080 int
1081 __aio_rw(int rw, int fd, char *buf, unsigned len, unsigned offset)
1082 {
1083         struct io_event event;
1084         static struct timespec ts;
1085         struct iocb *iocbs[] = { &iocb };
1086         int ret;
1087         long res;
1088
1089         if (rw == READ) {
1090                 io_prep_pread(&iocb, fd, buf, len, offset);
1091         } else {
1092                 io_prep_pwrite(&iocb, fd, buf, len, offset);
1093         }
1094
1095         ts.tv_sec = 30;
1096         ts.tv_nsec = 0;
1097         ret = io_submit(io_ctx, 1, iocbs);
1098         if (ret != 1) {
1099                 fprintf(stderr, "errcode=%d\n", ret);
1100                 fprintf(stderr, "aio_rw: io_submit failed: %s\n",
1101                                 strerror(ret));
1102                 goto out_error;
1103         }
1104
1105         ret = io_getevents(io_ctx, 1, 1, &event, &ts);
1106         if (ret != 1) {
1107                 if (ret == 0)
1108                         fprintf(stderr, "aio_rw: no events available\n");
1109                 else {
1110                         fprintf(stderr, "errcode=%d\n", -ret);
1111                         fprintf(stderr, "aio_rw: io_getevents failed: %s\n",
1112                                         strerror(-ret));
1113                 }
1114                 goto out_error;
1115         }
1116         if (len != event.res) {
1117                 /*
1118                  * The b0rked libaio defines event.res as unsigned.
1119                  * However the kernel strucuture has it signed,
1120                  * and it's used to pass negated error value.
1121                  * Till the library is fixed use the temp var.
1122                  */
1123                 res = (long)event.res;
1124                 if (res >= 0)
1125                         fprintf(stderr, "bad io length: %lu instead of %u\n",
1126                                         res, len);
1127                 else {
1128                         fprintf(stderr, "errcode=%ld\n", -res);
1129                         fprintf(stderr, "aio_rw: async io failed: %s\n",
1130                                         strerror(-res));
1131                         ret = res;
1132                         goto out_error;
1133                 }
1134
1135         }
1136         return event.res;
1137
1138 out_error:
1139         /*
1140          * The caller expects error return in traditional libc
1141          * convention, i.e. -1 and the errno set to error.
1142          */
1143         errno = -ret;
1144         return -1;
1145 }
1146
1147 int aio_rw(int rw, int fd, char *buf, unsigned len, unsigned offset)
1148 {
1149         int ret;
1150
1151         if (aio) {
1152                 ret = __aio_rw(rw, fd, buf, len, offset);
1153         } else {
1154                 if (rw == READ)
1155                         ret = read(fd, buf, len);
1156                 else
1157                         ret = write(fd, buf, len);
1158         }
1159         return ret;
1160 }
1161
1162 #endif
1163
1164 int
1165 main(int argc, char **argv)
1166 {
1167         int     i, style, ch;
1168         char    *endp;
1169         char goodfile[1024];
1170         char logfile[1024];
1171
1172         goodfile[0] = 0;
1173         logfile[0] = 0;
1174
1175         page_size = getpagesize();
1176         page_mask = page_size - 1;
1177         mmap_mask = page_mask;
1178
1179
1180         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
1181
1182         while ((ch = getopt(argc, argv, "b:c:dfl:m:no:p:qr:s:t:w:xyAD:FLN:OP:RS:WZ"))
1183                != EOF)
1184                 switch (ch) {
1185                 case 'b':
1186                         simulatedopcount = getnum(optarg, &endp);
1187                         if (!quiet)
1188                                 fprintf(stdout, "Will begin at operation %ld\n",
1189                                         simulatedopcount);
1190                         if (simulatedopcount == 0)
1191                                 usage();
1192                         simulatedopcount -= 1;
1193                         break;
1194                 case 'c':
1195                         closeprob = getnum(optarg, &endp);
1196                         if (!quiet)
1197                                 fprintf(stdout,
1198                                         "Chance of close/open is 1 in %d\n",
1199                                         closeprob);
1200                         if (closeprob <= 0)
1201                                 usage();
1202                         break;
1203                 case 'd':
1204                         debug = 1;
1205                         break;
1206                 case 'f':
1207                         flush = 1;
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 'x':
1263                         prealloc = 1;
1264                         break;
1265                 case 'y':
1266                         do_fsync = 1;
1267                         break;
1268                 case 'A':
1269                         aio = 1;
1270                         break;
1271                 case 'D':
1272                         debugstart = getnum(optarg, &endp);
1273                         if (debugstart < 1)
1274                                 usage();
1275                         break;
1276                 case 'F':
1277                         fallocate_calls = 0;
1278                         break;
1279                 case 'L':
1280                         lite = 1;
1281                         break;
1282                 case 'N':
1283                         numops = getnum(optarg, &endp);
1284                         if (numops < 0)
1285                                 usage();
1286                         break;
1287                 case 'O':
1288                         randomoplen = 0;
1289                         break;
1290                 case 'P':
1291                         strncpy(goodfile, optarg, sizeof(goodfile));
1292                         strcat(goodfile, "/");
1293                         strncpy(logfile, optarg, sizeof(logfile));
1294                         strcat(logfile, "/");
1295                         break;
1296                 case 'R':
1297                         mapped_reads = 0;
1298                         break;
1299                 case 'S':
1300                         seed = getnum(optarg, &endp);
1301                         if (seed == 0)
1302                                 seed = time(0) % 10000;
1303                         if (!quiet)
1304                                 fprintf(stdout, "Seed set to %d\n", seed);
1305                         if (seed < 0)
1306                                 usage();
1307                         break;
1308                 case 'W':
1309                         mapped_writes = 0;
1310                         if (!quiet)
1311                                 fprintf(stdout, "mapped writes DISABLED\n");
1312                         break;
1313                 case 'Z':
1314                         o_direct = O_DIRECT;
1315                         break;
1316                 default:
1317                         usage();
1318                         /* NOTREACHED */
1319                 }
1320         argc -= optind;
1321         argv += optind;
1322         if (argc != 1)
1323                 usage();
1324         fname = argv[0];
1325
1326         signal(SIGHUP,  cleanup);
1327         signal(SIGINT,  cleanup);
1328         signal(SIGPIPE, cleanup);
1329         signal(SIGALRM, cleanup);
1330         signal(SIGTERM, cleanup);
1331         signal(SIGXCPU, cleanup);
1332         signal(SIGXFSZ, cleanup);
1333         signal(SIGVTALRM,       cleanup);
1334         signal(SIGUSR1, cleanup);
1335         signal(SIGUSR2, cleanup);
1336
1337         initstate(seed, state, 256);
1338         setstate(state);
1339         fd = open(fname,
1340                 O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC)|o_direct, 0666);
1341         if (fd < 0) {
1342                 prterr(fname);
1343                 exit(91);
1344         }
1345 #ifdef XFS
1346         if (prealloc) {
1347                 xfs_flock64_t   resv = { 0 };
1348 #ifdef HAVE_XFS_PLATFORM_DEFS_H
1349                 if (!platform_test_xfs_fd(fd)) {
1350                         prterr(fname);
1351                         fprintf(stderr, "main: cannot prealloc, non XFS\n");
1352                         exit(96);
1353                 }
1354 #endif
1355                 resv.l_len = maxfilelen;
1356                 if ((xfsctl(fname, fd, XFS_IOC_RESVSP, &resv)) < 0) {
1357                         prterr(fname);
1358                         exit(97);
1359                 }
1360         }
1361 #endif
1362         strncat(goodfile, fname, 256);
1363         strcat (goodfile, ".fsxgood");
1364         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1365         if (fsxgoodfd < 0) {
1366                 prterr(goodfile);
1367                 exit(92);
1368         }
1369         strncat(logfile, fname, 256);
1370         strcat (logfile, ".fsxlog");
1371         fsxlogf = fopen(logfile, "w");
1372         if (fsxlogf == NULL) {
1373                 prterr(logfile);
1374                 exit(93);
1375         }
1376
1377 #ifdef AIO
1378         if (aio)
1379                 aio_setup();
1380 #endif
1381
1382         if (lite) {
1383                 off_t ret;
1384                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1385                 if (file_size == (off_t)-1) {
1386                         prterr(fname);
1387                         warn("main: lseek eof");
1388                         exit(94);
1389                 }
1390                 ret = lseek(fd, (off_t)0, SEEK_SET);
1391                 if (ret == (off_t)-1) {
1392                         prterr(fname);
1393                         warn("main: lseek 0");
1394                         exit(95);
1395                 }
1396         }
1397         original_buf = (char *) malloc(maxfilelen);
1398         for (i = 0; i < maxfilelen; i++)
1399                 original_buf[i] = random() % 256;
1400         good_buf = (char *) malloc(maxfilelen + writebdy);
1401         good_buf = round_up(good_buf, writebdy, 0);
1402         memset(good_buf, '\0', maxfilelen);
1403         temp_buf = (char *) malloc(maxoplen + readbdy);
1404         temp_buf = round_up(temp_buf, readbdy, 0);
1405         memset(temp_buf, '\0', maxoplen);
1406         if (lite) {     /* zero entire existing file */
1407                 ssize_t written;
1408
1409                 written = write(fd, good_buf, (size_t)maxfilelen);
1410                 if (written != maxfilelen) {
1411                         if (written == -1) {
1412                                 prterr(fname);
1413                                 warn("main: error on write");
1414                         } else
1415                                 warn("main: short write, 0x%x bytes instead "
1416                                         "of 0x%lx\n",
1417                                         (unsigned)written,
1418                                         maxfilelen);
1419                         exit(98);
1420                 }
1421         } else
1422                 check_trunc_hack();
1423
1424 #ifdef FALLOCATE
1425         if (!lite && fallocate_calls) {
1426                 if (fallocate(fd, 0, 0, 1) && errno == EOPNOTSUPP) {
1427                         if(!quiet)
1428                                 prt("fsx: main: filesystem does not support fallocate, disabling\n");
1429                         fallocate_calls = 0;
1430                 } else
1431                         ftruncate(fd, 0);
1432         }
1433 #else /* ! FALLOCATE */
1434         fallocate_calls = 0;
1435 #endif
1436
1437         while (numops == -1 || numops--)
1438                 test();
1439
1440         if (close(fd)) {
1441                 prterr("close");
1442                 report_failure(99);
1443         }
1444         prt("All operations completed A-OK!\n");
1445
1446         exit(0);
1447         return 0;
1448 }