src/tests/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
  12 #include <sys/types.h>
  13 #include <sys/stat.h>
  14 #if defined(sun) || defined(_UWIN) || defined(__linux)
  15 # include <sys/param.h>
  16 # include <limits.h>
  17 # include <time.h>
  18 # include <strings.h>
  19 # define MAP_FILE 0
  20 #else
  21 # include <sys/dirent.h>
  22 #endif
  23 #include <sys/file.h>
  24 #include <sys/mman.h>
  25 #include <limits.h>
  26 #include <err.h>
  27 #include <signal.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32 #include <stdarg.h>
  33 #include <errno.h>
  34 #include <fcntl.h>
  35
  36 #if !defined L_SET
  37 # define L_SET          SEEK_SET
  38 #endif
  39 #if !defined L_INCR
  40 # define L_INCR         SEEK_CUR
  41 #endif
  42 #if !defined L_XTND
  43 # define L_XTND         SEEK_END
  44 #endif
  45
  46 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  47
  48 /*
  49  *      A log entry is an operation and a bunch of arguments.
  50  */
  51
  52 struct log_entry {
  53     int operation;
  54     int args[3];
  55 };
  56
  57 #define LOGSIZE 1000
  58
  59 struct log_entry oplog[LOGSIZE];        /* the log */
  60 int logptr = 0;                 /* current position in log */
  61 int logcount = 0;               /* total ops */
  62
  63 /*
  64  *      Define operations
  65  */
  66
  67 #define OP_READ         1
  68 #define OP_WRITE        2
  69 #define OP_TRUNCATE     3
  70 #define OP_CLOSEOPEN    4
  71 #define OP_MAPREAD      5
  72 #define OP_MAPWRITE     6
  73 #define OP_SKIPPED      7
  74
  75 #ifndef PAGE_SIZE
  76 #define PAGE_SIZE       4096
  77 #endif
  78 #define PAGE_MASK       (PAGE_SIZE - 1)
  79
  80 char *original_buf;             /* a pointer to the original data */
  81 char *good_buf;                 /* a pointer to the correct data */
  82 char *temp_buf;                 /* a pointer to the current data */
  83 char *fname;                    /* name of our test file */
  84 int fd;                         /* fd for our test file */
  85
  86 off_t file_size = 0;
  87 off_t biggest = 0;
  88 char state[256];
  89 unsigned long testcalls = 0;    /* calls to function "test" */
  90
  91 unsigned long simulatedopcount = 0;     /* -b flag */
  92 int closeprob = 0;              /* -c flag */
  93 int debug = 0;                  /* -d flag */
  94 unsigned long debugstart = 0;   /* -D 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 truncbdy = 1;               /* -t flag */
 103 int writebdy = 1;               /* -w flag */
 104 long monitorstart = -1;         /* -m flag */
 105 long monitorend = -1;           /* -m flag */
 106 int lite = 0;                   /* -L flag */
 107 long numops = -1;               /* -N flag */
 108 int randomoplen = 1;            /* -O flag disables it */
 109 int seed = 1;                   /* -S flag */
 110 int mapped_writes = 1;          /* -W flag disables */
 111 int mapped_reads = 1;           /* -R flag disables it */
 112 int fsxgoodfd = 0;
 113 FILE *fsxlogf = NULL;
 114 int badoff = -1;
 115 int closeopen = 0;
 116
 117
 118 void
 119 prt(char *fmt, ...)
 120 {
 121     va_list args;
 122
 123     va_start(args, fmt);
 124     vfprintf(stdout, fmt, args);
 125     if (fsxlogf)
 126         vfprintf(fsxlogf, fmt, args);
 127     va_end(args);
 128 }
 129
 130 void
 131 prterr(char *prefix)
 132 {
 133     prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 134 }
 135
 136
 137 void
 138 log4(int operation, int arg0, int arg1, int arg2)
 139 {
 140     struct log_entry *le;
 141
 142     le = &oplog[logptr];
 143     le->operation = operation;
 144     if (closeopen)
 145         le->operation = ~le->operation;
 146     le->args[0] = arg0;
 147     le->args[1] = arg1;
 148     le->args[2] = arg2;
 149     logptr++;
 150     logcount++;
 151     if (logptr >= LOGSIZE)
 152         logptr = 0;
 153 }
 154
 155
 156 void
 157 logdump(void)
 158 {
 159     int i, count, down;
 160     struct log_entry *lp;
 161
 162     prt("LOG DUMP (%d total operations):\n", logcount);
 163     if (logcount < LOGSIZE) {
 164         i = 0;
 165         count = logcount;
 166     } else {
 167         i = logptr;
 168         count = LOGSIZE;
 169     }
 170     for (; count > 0; count--) {
 171         int opnum;
 172
 173         opnum = i + 1 + (logcount / LOGSIZE) * LOGSIZE;
 174         prt("%d(%d mod 256): ", opnum, opnum % 256);
 175         lp = &oplog[i];
 176         if ((closeopen = lp->operation < 0))
 177             lp->operation = ~lp->operation;
 178
 179         switch (lp->operation) {
 180         case OP_MAPREAD:
 181             prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)", lp->args[0],
 182                 lp->args[0] + lp->args[1] - 1, lp->args[1]);
 183             if (badoff >= lp->args[0] && badoff < lp->args[0] + lp->args[1])
 184                 prt("\t***RRRR***");
 185             break;
 186         case OP_MAPWRITE:
 187             prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)", lp->args[0],
 188                 lp->args[0] + lp->args[1] - 1, lp->args[1]);
 189             if (badoff >= lp->args[0] && badoff < lp->args[0] + lp->args[1])
 190                 prt("\t******WWWW");
 191             break;
 192         case OP_READ:
 193             prt("READ\t0x%x thru 0x%x\t(0x%x bytes)", lp->args[0],
 194                 lp->args[0] + lp->args[1] - 1, lp->args[1]);
 195             if (badoff >= lp->args[0] && badoff < lp->args[0] + lp->args[1])
 196                 prt("\t***RRRR***");
 197             break;
 198         case OP_WRITE:
 199             prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)", lp->args[0],
 200                 lp->args[0] + lp->args[1] - 1, lp->args[1]);
 201             if (lp->args[0] > lp->args[2])
 202                 prt(" HOLE");
 203             else if (lp->args[0] + lp->args[1] > lp->args[2])
 204                 prt(" EXTEND");
 205             if ((badoff >= lp->args[0] || badoff >= lp->args[2])
 206                 && badoff < lp->args[0] + lp->args[1])
 207                 prt("\t***WWWW");
 208             break;
 209         case OP_TRUNCATE:
 210             down = lp->args[0] < lp->args[1];
 211             prt("TRUNCATE %s\tfrom 0x%x to 0x%x", down ? "DOWN" : "UP",
 212                 lp->args[1], lp->args[0]);
 213             if (badoff >= lp->args[!down] && badoff < lp->args[!!down])
 214                 prt("\t******WWWW");
 215             break;
 216         case OP_SKIPPED:
 217             prt("SKIPPED (no operation)");
 218             break;
 219         default:
 220             prt("BOGUS LOG ENTRY (operation code = %d)!", lp->operation);
 221         }
 222         if (closeopen)
 223             prt("\n\t\tCLOSE/OPEN");
 224         prt("\n");
 225         i++;
 226         if (i == LOGSIZE)
 227             i = 0;
 228     }
 229 }
 230
 231
 232 void
 233 save_buffer(char *buffer, off_t bufferlength, int fd)
 234 {
 235     off_t ret;
 236     ssize_t byteswritten;
 237
 238     if (fd <= 0 || bufferlength == 0)
 239         return;
 240
 241     if (bufferlength > SSIZE_MAX) {
 242         prt("fsx flaw: overflow in save_buffer\n");
 243         exit(67);
 244     }
 245     if (lite) {
 246         off_t size_by_seek = lseek(fd, (off_t) 0, L_XTND);
 247         if (size_by_seek == (off_t) - 1)
 248             prterr("save_buffer: lseek eof");
 249         else if (bufferlength > size_by_seek) {
 250             warn("save_buffer: .fsxgood file too short... will save 0x%qx bytes instead of 0x%qx\n", (unsigned long long)size_by_seek, (unsigned long long)bufferlength);
 251             bufferlength = size_by_seek;
 252         }
 253     }
 254
 255     ret = lseek(fd, (off_t) 0, SEEK_SET);
 256     if (ret == (off_t) - 1)
 257         prterr("save_buffer: lseek 0");
 258
 259     byteswritten = write(fd, buffer, (size_t) bufferlength);
 260     if (byteswritten != bufferlength) {
 261         if (byteswritten == -1)
 262             prterr("save_buffer write");
 263         else
 264             warn("save_buffer: short write, 0x%x bytes instead of 0x%qx\n",
 265                  (unsigned)byteswritten, (unsigned long long)bufferlength);
 266     }
 267 }
 268
 269
 270 void
 271 report_failure(int status)
 272 {
 273     logdump();
 274
 275     if (fsxgoodfd) {
 276         if (good_buf) {
 277             save_buffer(good_buf, file_size, fsxgoodfd);
 278             prt("Correct content saved for comparison\n");
 279             prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n", fname, fname);
 280         }
 281         close(fsxgoodfd);
 282     }
 283     exit(status);
 284 }
 285
 286
 287 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 288                                         *(((unsigned char *)(cp)) + 1)))
 289
 290 void
 291 check_buffers(unsigned offset, unsigned size)
 292 {
 293     unsigned char c, t;
 294     unsigned i = 0;
 295     unsigned n = 0;
 296     unsigned op = 0;
 297     unsigned bad = 0;
 298
 299     if (bcmp(good_buf + offset, temp_buf, size) != 0) {
 300         prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n", offset, size);
 301         prt("OFFSET\tGOOD\tBAD\tRANGE\n");
 302         while (size > 0) {
 303             c = good_buf[offset];
 304             t = temp_buf[i];
 305             if (c != t) {
 306                 if (n == 0) {
 307                     bad = short_at(&temp_buf[i]);
 308                     prt("0x%5x\t0x%04x\t0x%04x", offset,
 309                         short_at(&good_buf[offset]), bad);
 310                     op = temp_buf[offset & 1 ? i + 1 : i];
 311                 }
 312                 n++;
 313                 badoff = offset;
 314             }
 315             offset++;
 316             i++;
 317             size--;
 318         }
 319         if (n) {
 320             prt("\t0x%5x\n", n);
 321             if (bad)
 322                 prt("operation# (mod 256) for the bad data may be %u\n",
 323                     ((unsigned)op & 0xff));
 324             else
 325                 prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
 326         } else
 327             prt("????????????????\n");
 328         report_failure(110);
 329     }
 330 }
 331
 332
 333 void
 334 check_size(void)
 335 {
 336     struct stat statbuf;
 337     off_t size_by_seek;
 338
 339     if (fstat(fd, &statbuf)) {
 340         prterr("check_size: fstat");
 341         statbuf.st_size = -1;
 342     }
 343     size_by_seek = lseek(fd, (off_t) 0, L_XTND);
 344     if (file_size != statbuf.st_size || file_size != size_by_seek) {
 345         prt("Size error: expected 0x%qx stat 0x%qx seek 0x%qx\n",
 346             (unsigned long long)file_size,
 347             (unsigned long long)statbuf.st_size,
 348             (unsigned long long)size_by_seek);
 349         report_failure(120);
 350     }
 351 }
 352
 353
 354 void
 355 check_trunc_hack(void)
 356 {
 357     struct stat statbuf;
 358
 359     ftruncate(fd, (off_t) 0);
 360     ftruncate(fd, (off_t) 100000);
 361     fstat(fd, &statbuf);
 362     if (statbuf.st_size != (off_t) 100000) {
 363         prt("no extend on truncate! not posix!\n");
 364         exit(130);
 365     }
 366     ftruncate(fd, 0);
 367 }
 368
 369
 370 void
 371 doread(unsigned offset, unsigned size)
 372 {
 373     off_t ret;
 374     unsigned iret;
 375
 376     offset -= offset % readbdy;
 377     if (size == 0) {
 378         if (!quiet && testcalls > simulatedopcount)
 379             prt("skipping zero size read\n");
 380         log4(OP_SKIPPED, OP_READ, offset, size);
 381         return;
 382     }
 383     if (size + offset > file_size) {
 384         if (!quiet && testcalls > simulatedopcount)
 385             prt("skipping seek/read past end of file\n");
 386         log4(OP_SKIPPED, OP_READ, offset, size);
 387         return;
 388     }
 389
 390     log4(OP_READ, offset, size, 0);
 391
 392     if (testcalls <= simulatedopcount)
 393         return;
 394
 395     if (!quiet
 396         && ((progressinterval && testcalls % progressinterval == 0)
 397             || (debug
 398                 && (monitorstart == -1 || offset + size > monitorstart)
 399                 && (monitorend == -1 || offset <= monitorend))))
 400         prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls, offset,
 401             offset + size - 1, size);
 402     ret = lseek(fd, (off_t) offset, SEEK_SET);
 403     if (ret == (off_t) - 1) {
 404         prterr("doread: lseek");
 405         report_failure(140);
 406     }
 407     iret = read(fd, temp_buf, size);
 408     if (iret != size) {
 409         if (iret == -1)
 410             prterr("doread: read");
 411         else
 412             prt("short read: 0x%x bytes instead of 0x%x\n", iret, size);
 413         report_failure(141);
 414     }
 415     check_buffers(offset, size);
 416 }
 417
 418
 419 void
 420 domapread(unsigned offset, unsigned size)
 421 {
 422     unsigned pg_offset;
 423     unsigned map_size;
 424     char *p;
 425
 426     offset -= offset % readbdy;
 427     if (size == 0) {
 428         if (!quiet && testcalls > simulatedopcount)
 429             prt("skipping zero size read\n");
 430         log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 431         return;
 432     }
 433     if (size + offset > file_size) {
 434         if (!quiet && testcalls > simulatedopcount)
 435             prt("skipping seek/read past end of file\n");
 436         log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 437         return;
 438     }
 439
 440     log4(OP_MAPREAD, offset, size, 0);
 441
 442     if (testcalls <= simulatedopcount)
 443         return;
 444
 445     if (!quiet
 446         && ((progressinterval && testcalls % progressinterval == 0)
 447             || (debug
 448                 && (monitorstart == -1 || offset + size > monitorstart)
 449                 && (monitorend == -1 || offset <= monitorend))))
 450         prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls, offset,
 451             offset + size - 1, size);
 452
 453     pg_offset = offset & PAGE_MASK;
 454     map_size = pg_offset + size;
 455
 456     if ((p =
 457          (char *)mmap(0, map_size, PROT_READ, MAP_FILE, fd,
 458                       (off_t) (offset - pg_offset))) == (char *)-1) {
 459         prterr("domapread: mmap");
 460         report_failure(190);
 461     }
 462     memcpy(temp_buf, p + pg_offset, size);
 463     if (munmap(p, map_size) != 0) {
 464         prterr("domapread: munmap");
 465         report_failure(191);
 466     }
 467
 468     check_buffers(offset, size);
 469 }
 470
 471
 472 void
 473 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 474 {
 475     while (size--) {
 476         good_buf[offset] = testcalls % 256;
 477         if (offset % 2)
 478             good_buf[offset] += original_buf[offset];
 479         offset++;
 480     }
 481 }
 482
 483
 484 void
 485 dowrite(unsigned offset, unsigned size)
 486 {
 487     off_t ret;
 488     unsigned iret;
 489
 490     offset -= offset % writebdy;
 491     if (size == 0) {
 492         if (!quiet && testcalls > simulatedopcount)
 493             prt("skipping zero size write\n");
 494         log4(OP_SKIPPED, OP_WRITE, offset, size);
 495         return;
 496     }
 497
 498     log4(OP_WRITE, offset, size, file_size);
 499
 500     gendata(original_buf, good_buf, offset, size);
 501     if (file_size < offset + size) {
 502         if (file_size < offset)
 503             bzero(good_buf + file_size, offset - file_size);
 504         file_size = offset + size;
 505         if (lite) {
 506             warn("Lite file size bug in fsx!");
 507             report_failure(149);
 508         }
 509     }
 510
 511     if (testcalls <= simulatedopcount)
 512         return;
 513
 514     if (!quiet
 515         && ((progressinterval && testcalls % progressinterval == 0)
 516             || (debug
 517                 && (monitorstart == -1 || offset + size > monitorstart)
 518                 && (monitorend == -1 || offset <= monitorend))))
 519         prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls, offset,
 520             offset + size - 1, size);
 521     ret = lseek(fd, (off_t) offset, SEEK_SET);
 522     if (ret == (off_t) - 1) {
 523         prterr("dowrite: lseek");
 524         report_failure(150);
 525     }
 526     iret = write(fd, good_buf + offset, size);
 527     if (iret != size) {
 528         if (iret == -1)
 529             prterr("dowrite: write");
 530         else
 531             prt("short write: 0x%x bytes instead of 0x%x\n", iret, size);
 532         report_failure(151);
 533     }
 534 }
 535
 536
 537 void
 538 domapwrite(unsigned offset, unsigned size)
 539 {
 540     unsigned pg_offset;
 541     unsigned map_size;
 542     off_t cur_filesize;
 543     char *p;
 544
 545     offset -= offset % writebdy;
 546     if (size == 0) {
 547         if (!quiet && testcalls > simulatedopcount)
 548             prt("skipping zero size write\n");
 549         log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
 550         return;
 551     }
 552     cur_filesize = file_size;
 553
 554     log4(OP_MAPWRITE, offset, size, 0);
 555
 556     gendata(original_buf, good_buf, offset, size);
 557     if (file_size < offset + size) {
 558         if (file_size < offset)
 559             bzero(good_buf + file_size, offset - file_size);
 560         file_size = offset + size;
 561         if (lite) {
 562             warn("Lite file size bug in fsx!");
 563             report_failure(200);
 564         }
 565     }
 566
 567     if (testcalls <= simulatedopcount)
 568         return;
 569
 570     if (!quiet
 571         && ((progressinterval && testcalls % progressinterval == 0)
 572             || (debug
 573                 && (monitorstart == -1 || offset + size > monitorstart)
 574                 && (monitorend == -1 || offset <= monitorend))))
 575         prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 576             offset, offset + size - 1, size);
 577
 578     if (file_size > cur_filesize) {
 579         if (ftruncate(fd, file_size) == -1) {
 580             prterr("domapwrite: ftruncate");
 581             exit(201);
 582         }
 583     }
 584     pg_offset = offset & PAGE_MASK;
 585     map_size = pg_offset + size;
 586
 587     if ((p =
 588          (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 589                       MAP_FILE | MAP_SHARED, fd,
 590                       (off_t) (offset - pg_offset))) == (char *)-1) {
 591         prterr("domapwrite: mmap");
 592         report_failure(202);
 593     }
 594     memcpy(p + pg_offset, good_buf + offset, size);
 595     if (msync(p, map_size, 0) != 0) {
 596         prterr("domapwrite: msync");
 597         report_failure(203);
 598     }
 599     if (munmap(p, map_size) != 0) {
 600         prterr("domapwrite: munmap");
 601         report_failure(204);
 602     }
 603 }
 604
 605
 606 void
 607 dotruncate(unsigned size)
 608 {
 609     int oldsize = file_size;
 610
 611     size -= size % truncbdy;
 612     if (size > biggest) {
 613         biggest = size;
 614         if (!quiet && testcalls > simulatedopcount)
 615             prt("truncating to largest ever: 0x%x\n", size);
 616     }
 617
 618     log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
 619
 620     if (size > file_size)
 621         bzero(good_buf + file_size, size - file_size);
 622     file_size = size;
 623
 624     if (testcalls <= simulatedopcount)
 625         return;
 626
 627     if ((progressinterval && testcalls % progressinterval == 0)
 628         || (debug
 629             && (monitorstart == -1 || monitorend == -1 || size <= monitorend)))
 630         prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
 631     if (ftruncate(fd, (off_t) size) == -1) {
 632         prt("ftruncate1: %x\n", size);
 633         prterr("dotruncate: ftruncate");
 634         report_failure(160);
 635     }
 636 }
 637
 638
 639 void
 640 writefileimage(void)
 641 {
 642     ssize_t iret;
 643
 644     if (lseek(fd, (off_t) 0, SEEK_SET) == (off_t) - 1) {
 645         prterr("writefileimage: lseek");
 646         report_failure(171);
 647     }
 648     iret = write(fd, good_buf, file_size);
 649     if ((off_t) iret != file_size) {
 650         if (iret == -1)
 651             prterr("writefileimage: write");
 652         else
 653             prt("short write: 0x%x bytes instead of 0x%qx\n", iret,
 654                 (unsigned long long)file_size);
 655         report_failure(172);
 656     }
 657     if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 658         prt("ftruncate2: %qx\n", (unsigned long long)file_size);
 659         prterr("writefileimage: ftruncate");
 660         report_failure(173);
 661     }
 662 }
 663
 664
 665 void
 666 docloseopen(void)
 667 {
 668     if (testcalls <= simulatedopcount)
 669         return;
 670
 671     if (debug)
 672         prt("%lu close/open\n", testcalls);
 673     if (close(fd)) {
 674         prterr("docloseopen: close");
 675         report_failure(180);
 676     }
 677     fd = open(fname, O_RDWR, 0);
 678     if (fd < 0) {
 679         prterr("docloseopen: open");
 680         report_failure(181);
 681     }
 682 }
 683
 684
 685 void
 686 test(void)
 687 {
 688     unsigned long offset;
 689     unsigned long size = maxoplen;
 690     unsigned long rv = random();
 691     unsigned long op = rv % (3 + !lite + mapped_writes);
 692
 693     /* turn off the map read if necessary */
 694
 695     if (op == 2 && !mapped_reads)
 696         op = 0;
 697
 698     if (simulatedopcount > 0 && testcalls == simulatedopcount)
 699         writefileimage();
 700
 701     testcalls++;
 702
 703     closeopen = (rv >> 3) < (1 << 28) / closeprob;
 704
 705     if (debugstart > 0 && testcalls >= debugstart)
 706         debug = 1;
 707
 708     if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
 709         prt("%lu...\n", testcalls);
 710
 711     /*
 712      * READ:        op = 0
 713      * WRITE:       op = 1
 714      * MAPREAD:     op = 2
 715      * TRUNCATE:    op = 3
 716      * MAPWRITE:    op = 3 or 4
 717      */
 718     if (lite ? 0 : op == 3 && (style & 1) == 0) /* vanilla truncate? */
 719         dotruncate(random() % maxfilelen);
 720     else {
 721         if (randomoplen)
 722             size = random() % (maxoplen + 1);
 723         if (lite ? 0 : op == 3)
 724             dotruncate(size);
 725         else {
 726             offset = random();
 727             if (op == 1 || op == (lite ? 3 : 4)) {
 728                 offset %= maxfilelen;
 729                 if (offset + size > maxfilelen)
 730                     size = maxfilelen - offset;
 731                 if (op != 1)
 732                     domapwrite(offset, size);
 733                 else
 734                     dowrite(offset, size);
 735             } else {
 736                 if (file_size)
 737                     offset %= file_size;
 738                 else
 739                     offset = 0;
 740                 if (offset + size > file_size)
 741                     size = file_size - offset;
 742                 if (op != 0)
 743                     domapread(offset, size);
 744                 else
 745                     doread(offset, size);
 746             }
 747         }
 748     }
 749     if (sizechecks && testcalls > simulatedopcount)
 750         check_size();
 751     if (closeopen)
 752         docloseopen();
 753 }
 754
 755
 756 void
 757 cleanup(int sig)
 758 {
 759     if (sig)
 760         prt("signal %d\n", sig);
 761     prt("testcalls = %lu\n", testcalls);
 762     exit(sig);
 763 }
 764
 765
 766 void
 767 usage(void)
 768 {
 769     fprintf(stdout, "usage: %s",
 770             "fsx [-dnqLOW] [-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\
 771         -b opnum: beginning operation number (default 1)\n\
 772         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
 773         -d: debug output for all operations\n\
 774         -l flen: the upper bound on file size (default 262144)\n\
 775         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
 776         -n: no verifications of file size\n\
 777         -o oplen: the upper bound on operation size (default 65536)\n\
 778         -p progressinterval: debug output at specified operation interval\n\
 779         -q: quieter operation\n\
 780         -r readbdy: 4096 would make reads page aligned (default 1)\n\
 781         -s style: 1 gives smaller truncates (default 0)\n\
 782         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
 783         -w writebdy: 4096 would make writes page aligned (default 1)\n\
 784         -D startingop: debug output starting at specified operation\n\
 785         -L: fsxLite - no file creations & no file size changes\n\
 786         -N numops: total # operations to do (default infinity)\n\
 787         -O: use oplen (see -o flag) for every op (default random)\n\
 788         -P: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
 789         -S seed: for random # generator (default 1) 0 gets timestamp\n\
 790         -W: mapped write operations DISabled\n\
 791         -R: read() system calls only (mapped reads disabled)\n\
 792         fname: this filename is REQUIRED (no default)\n");
 793     exit(90);
 794 }
 795
 796
 797 int
 798 getnum(char *s, char **e)
 799 {
 800     int ret = -1;
 801
 802     *e = NULL;
 803     ret = strtol(s, e, 0);
 804     if (*e)
 805         switch (**e) {
 806         case 'b':
 807         case 'B':
 808             ret *= 512;
 809             *e = *e + 1;
 810             break;
 811         case 'k':
 812         case 'K':
 813             ret *= 1024;
 814             *e = *e + 1;
 815             break;
 816         case 'm':
 817         case 'M':
 818             ret *= 1024 * 1024;
 819             *e = *e + 1;
 820             break;
 821         case 'w':
 822         case 'W':
 823             ret *= 4;
 824             *e = *e + 1;
 825             break;
 826         }
 827     return (ret);
 828 }
 829
 830
 831 int
 832 main(int argc, char **argv)
 833 {
 834     int i, style, ch;
 835     char *endp;
 836     char goodfile[1024];
 837     char logfile[1024];
 838
 839     goodfile[0] = 0;
 840     logfile[0] = 0;
 841
 842     setvbuf(stdout, NULL, _IOLBF, 0);   /* line buffered stdout */
 843
 844     while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))
 845            != EOF)
 846         switch (ch) {
 847         case 'b':
 848             simulatedopcount = getnum(optarg, &endp);
 849             if (!quiet)
 850                 fprintf(stdout, "Will begin at operation %ld\n",
 851                         simulatedopcount);
 852             if (simulatedopcount == 0)
 853                 usage();
 854             simulatedopcount -= 1;
 855             break;
 856         case 'c':
 857             closeprob = getnum(optarg, &endp);
 858             if (!quiet)
 859                 fprintf(stdout, "Chance of close/open is 1 in %d\n",
 860                         closeprob);
 861             if (closeprob <= 0)
 862                 usage();
 863             break;
 864         case 'd':
 865             debug = 1;
 866             break;
 867         case 'l':
 868             maxfilelen = getnum(optarg, &endp);
 869             if (maxfilelen <= 0)
 870                 usage();
 871             break;
 872         case 'm':
 873             monitorstart = getnum(optarg, &endp);
 874             if (monitorstart < 0)
 875                 usage();
 876             if (!endp || *endp++ != ':')
 877                 usage();
 878             monitorend = getnum(endp, &endp);
 879             if (monitorend < 0)
 880                 usage();
 881             if (monitorend == 0)
 882                 monitorend = -1;        /* aka infinity */
 883             debug = 1;
 884         case 'n':
 885             sizechecks = 0;
 886             break;
 887         case 'o':
 888             maxoplen = getnum(optarg, &endp);
 889             if (maxoplen <= 0)
 890                 usage();
 891             break;
 892         case 'p':
 893             progressinterval = getnum(optarg, &endp);
 894             if (progressinterval < 0)
 895                 usage();
 896             break;
 897         case 'q':
 898             quiet = 1;
 899             break;
 900         case 'r':
 901             readbdy = getnum(optarg, &endp);
 902             if (readbdy <= 0)
 903                 usage();
 904             break;
 905         case 's':
 906             style = getnum(optarg, &endp);
 907             if (style < 0 || style > 1)
 908                 usage();
 909             break;
 910         case 't':
 911             truncbdy = getnum(optarg, &endp);
 912             if (truncbdy <= 0)
 913                 usage();
 914             break;
 915         case 'w':
 916             writebdy = getnum(optarg, &endp);
 917             if (writebdy <= 0)
 918                 usage();
 919             break;
 920         case 'D':
 921             debugstart = getnum(optarg, &endp);
 922             if (debugstart < 1)
 923                 usage();
 924             break;
 925         case 'L':
 926             lite = 1;
 927             break;
 928         case 'N':
 929             numops = getnum(optarg, &endp);
 930             if (numops < 0)
 931                 usage();
 932             break;
 933         case 'O':
 934             randomoplen = 0;
 935             break;
 936         case 'P':
 937             strncpy(goodfile, optarg, sizeof(goodfile));
 938             strcat(goodfile, "/");
 939             strncpy(logfile, optarg, sizeof(logfile));
 940             strcat(logfile, "/");
 941             break;
 942         case 'R':
 943             mapped_reads = 0;
 944             break;
 945         case 'S':
 946             seed = getnum(optarg, &endp);
 947             if (seed == 0)
 948                 seed = time(0) % 10000;
 949             if (!quiet)
 950                 fprintf(stdout, "Seed set to %d\n", seed);
 951             if (seed < 0)
 952                 usage();
 953             break;
 954         case 'W':
 955             mapped_writes = 0;
 956             if (!quiet)
 957                 fprintf(stdout, "mapped writes DISABLED\n");
 958             break;
 959
 960         default:
 961             usage();
 962             /* NOTREACHED */
 963         }
 964     argc -= optind;
 965     argv += optind;
 966     if (argc != 1)
 967         usage();
 968     fname = argv[0];
 969
 970     signal(SIGHUP, cleanup);
 971     signal(SIGINT, cleanup);
 972     signal(SIGPIPE, cleanup);
 973     signal(SIGALRM, cleanup);
 974     signal(SIGTERM, cleanup);
 975     signal(SIGXCPU, cleanup);
 976     signal(SIGXFSZ, cleanup);
 977     signal(SIGVTALRM, cleanup);
 978     signal(SIGUSR1, cleanup);
 979     signal(SIGUSR2, cleanup);
 980
 981     initstate(seed, state, 256);
 982     setstate(state);
 983     fd = open(fname, O_RDWR | (lite ? 0 : O_CREAT | O_TRUNC), 0666);
 984     if (fd < 0) {
 985         prterr(fname);
 986         exit(91);
 987     }
 988     strncat(goodfile, fname, 256);
 989     strcat(goodfile, ".fsxgood");
 990     fsxgoodfd = open(goodfile, O_RDWR | O_CREAT | O_TRUNC, 0666);
 991     if (fsxgoodfd < 0) {
 992         prterr(goodfile);
 993         exit(92);
 994     }
 995     strncat(logfile, fname, 256);
 996     strcat(logfile, ".fsxlog");
 997     fsxlogf = fopen(logfile, "w");
 998     if (fsxlogf == NULL) {
 999         prterr(logfile);
1000         exit(93);
1001     }
1002     if (lite) {
1003         off_t ret;
1004         file_size = maxfilelen = lseek(fd, (off_t) 0, L_XTND);
1005         if (file_size == (off_t) - 1) {
1006             prterr(fname);
1007             warn("main: lseek eof");
1008             exit(94);
1009         }
1010         ret = lseek(fd, (off_t) 0, SEEK_SET);
1011         if (ret == (off_t) - 1) {
1012             prterr(fname);
1013             warn("main: lseek 0");
1014             exit(95);
1015         }
1016     }
1017     original_buf = (char *)malloc(maxfilelen);
1018     for (i = 0; i < maxfilelen; i++)
1019         original_buf[i] = random() % 256;
1020     good_buf = calloc(1, maxfilelen);
1021     temp_buf = calloc(1, maxoplen);
1022     if (lite) {                 /* zero entire existing file */
1023         ssize_t written;
1024
1025         written = write(fd, good_buf, (size_t) maxfilelen);
1026         if (written != maxfilelen) {
1027             if (written == -1) {
1028                 prterr(fname);
1029                 warn("main: error on write");
1030             } else
1031                 warn("main: short write, 0x%x bytes instead of 0x%x\n",
1032                      (unsigned)written, (unsigned)maxfilelen);
1033             exit(98);
1034         }
1035     } else
1036         check_trunc_hack();
1037
1038     while (numops == -1 || numops--)
1039         test();
1040
1041     if (close(fd)) {
1042         prterr("close");
1043         report_failure(99);
1044     }
1045     prt("All operations completed A-OK!\n");
1046
1047     exit(0);
1048     return 0;
1049 }