test/stress/fsx/fsx.c

   1 /*
   2  * Copyright (c) 1998-2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.2 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  *
  22  *      File:   fsx.c
  23  *      Author: Avadis Tevanian, Jr.
  24  *
  25  *      File system exerciser.
  26  *
  27  *      Rewrite and enhancements 1998-2001 Conrad Minshall -- conrad@mac.com
  28  *
  29  *      Various features from Joe Sokol, Pat Dirks, and Clark Warner.
  30  *
  31  *      Small changes to work under Linux -- davej@suse.de
  32  *
  33  *      Sundry porting patches from Guy Harris 12/2001
  34  *
  35  *      Checks for mmap last-page zero fill.
  36  *
  37  * $FreeBSD: src/tools/regression/fsx/fsx.c,v 1.2 2003/04/23 23:42:23 jkh Exp $
  38  * $DragonFly: src/test/stress/fsx/fsx.c,v 1.2 2005/05/02 19:31:56 dillon Exp $
  39  *
  40  */
  41
  42 #include <sys/types.h>
  43 #include <sys/stat.h>
  44 #ifdef _UWIN
  45 # include <sys/param.h>
  46 # include <limits.h>
  47 # include <time.h>
  48 # include <strings.h>
  49 #endif
  50 #include <fcntl.h>
  51 #include <sys/mman.h>
  52 #ifndef MAP_FILE
  53 # define MAP_FILE 0
  54 #endif
  55 #include <limits.h>
  56 #include <signal.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <unistd.h>
  61 #include <stdarg.h>
  62 #include <errno.h>
  63 #include <setjmp.h>
  64
  65 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  66
  67 /*
  68  *      A log entry is an operation and a bunch of arguments.
  69  */
  70
  71 struct log_entry {
  72         int     operation;
  73         int     args[3];
  74 };
  75
  76 #define LOGSIZE 1000
  77
  78 struct log_entry        oplog[LOGSIZE]; /* the log */
  79 int                     logptr = 0;     /* current position in log */
  80 int                     logcount = 0;   /* total ops */
  81 int                     jmpbuf_good;
  82 jmp_buf                 jmpbuf;
  83
  84 /*
  85  *      Define operations
  86  */
  87
  88 #define OP_READ         1
  89 #define OP_WRITE        2
  90 #define OP_TRUNCATE     3
  91 #define OP_CLOSEOPEN    4
  92 #define OP_MAPREAD      5
  93 #define OP_MAPWRITE     6
  94 #define OP_SKIPPED      7
  95
  96 int page_size;
  97 int page_mask;
  98
  99 char    *original_buf;                  /* a pointer to the original data */
 100 char    *good_buf;                      /* a pointer to the correct data */
 101 char    *temp_buf;                      /* a pointer to the current data */
 102 char    *fname;                         /* name of our test file */
 103 int     fd;                             /* fd for our test file */
 104
 105 off_t           file_size = 0;
 106 off_t           biggest = 0;
 107 char            state[256];
 108 unsigned long   testcalls = 0;          /* calls to function "test" */
 109
 110 unsigned long   simulatedopcount = 0;   /* -b flag */
 111 int     closeprob = 0;                  /* -c flag */
 112 int     debug = 0;                      /* -d flag */
 113 unsigned long   debugstart = 0;         /* -D flag */
 114 unsigned long   maxfilelen = 256 * 1024;        /* -l flag */
 115 int     sizechecks = 1;                 /* -n flag disables them */
 116 int     maxoplen = 64 * 1024;           /* -o flag */
 117 int     quiet = 0;                      /* -q flag */
 118 unsigned long progressinterval = 0;     /* -p flag */
 119 int     readbdy = 1;                    /* -r flag */
 120 int     style = 0;                      /* -s flag */
 121 int     truncbdy = 1;                   /* -t flag */
 122 int     writebdy = 1;                   /* -w flag */
 123 long    monitorstart = -1;              /* -m flag */
 124 long    monitorend = -1;                /* -m flag */
 125 int     lite = 0;                       /* -L flag */
 126 long    numops = -1;                    /* -N flag */
 127 int     randomoplen = 1;                /* -O flag disables it */
 128 int     seed = 1;                       /* -S flag */
 129 int     mapped_writes = 1;            /* -W flag disables */
 130 int     mapped_reads = 1;               /* -R flag disables it */
 131 int     fsxgoodfd = 0;
 132 FILE *  fsxlogf = NULL;
 133 int badoff = -1;
 134 int closeopen = 0;
 135
 136
 137 void
 138 vwarnc(code, fmt, ap)
 139         int code;
 140         const char *fmt;
 141         va_list ap;
 142 {
 143         fprintf(stderr, "fsx: ");
 144         if (fmt != NULL) {
 145                 vfprintf(stderr, fmt, ap);
 146                 fprintf(stderr, ": ");
 147         }
 148         fprintf(stderr, "%s\n", strerror(code));
 149 }
 150
 151
 152 void
 153 warn(const char * fmt, ...)
 154 {
 155         va_list ap;
 156         va_start(ap, fmt);
 157         vwarnc(errno, fmt, ap);
 158         va_end(ap);
 159 }
 160
 161
 162 void
 163 prt(char *fmt, ...)
 164 {
 165         va_list args;
 166
 167         va_start(args, fmt);
 168         vfprintf(stdout, fmt, args);
 169         if (fsxlogf)
 170                 vfprintf(fsxlogf, fmt, args);
 171         va_end(args);
 172 }
 173
 174 void
 175 prterr(char *prefix)
 176 {
 177         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 178 }
 179
 180
 181 void
 182 log4(int operation, int arg0, int arg1, int arg2)
 183 {
 184         struct log_entry *le;
 185
 186         le = &oplog[logptr];
 187         le->operation = operation;
 188         if (closeopen)
 189                 le->operation = ~ le->operation;
 190         le->args[0] = arg0;
 191         le->args[1] = arg1;
 192         le->args[2] = arg2;
 193         logptr++;
 194         logcount++;
 195         if (logptr >= LOGSIZE)
 196                 logptr = 0;
 197 }
 198
 199
 200 void
 201 logdump(void)
 202 {
 203         int     i, count, down;
 204         struct log_entry        *lp;
 205
 206         prt("LOG DUMP (%d total operations):\n", logcount);
 207         if (logcount < LOGSIZE) {
 208                 i = 0;
 209                 count = logcount;
 210         } else {
 211                 i = logptr;
 212                 count = LOGSIZE;
 213         }
 214         for ( ; count > 0; count--) {
 215                 int opnum;
 216
 217                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 218                 prt("%d(%d mod 256): ", opnum, opnum%256);
 219                 lp = &oplog[i];
 220                 if ((closeopen = lp->operation < 0))
 221                         lp->operation = ~ lp->operation;
 222
 223                 switch (lp->operation) {
 224                 case OP_MAPREAD:
 225                         prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
 226                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 227                             lp->args[1]);
 228                         if (badoff >= lp->args[0] && badoff <
 229                                                      lp->args[0] + lp->args[1])
 230                                 prt("\t***RRRR***");
 231                         break;
 232                 case OP_MAPWRITE:
 233                         prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
 234                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 235                             lp->args[1]);
 236                         if (badoff >= lp->args[0] && badoff <
 237                                                      lp->args[0] + lp->args[1])
 238                                 prt("\t******WWWW");
 239                         break;
 240                 case OP_READ:
 241                         prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
 242                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 243                             lp->args[1]);
 244                         if (badoff >= lp->args[0] &&
 245                             badoff < lp->args[0] + lp->args[1])
 246                                 prt("\t***RRRR***");
 247                         break;
 248                 case OP_WRITE:
 249                         prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
 250                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 251                             lp->args[1]);
 252                         if (lp->args[0] > lp->args[2])
 253                                 prt(" HOLE");
 254                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 255                                 prt(" EXTEND");
 256                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
 257                             badoff < lp->args[0] + lp->args[1])
 258                                 prt("\t***WWWW");
 259                         break;
 260                 case OP_TRUNCATE:
 261                         down = lp->args[0] < lp->args[1];
 262                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 263                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
 264                         if (badoff >= lp->args[!down] &&
 265                             badoff < lp->args[!!down])
 266                                 prt("\t******WWWW");
 267                         break;
 268                 case OP_SKIPPED:
 269                         prt("SKIPPED (no operation)");
 270                         break;
 271                 default:
 272                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 273                             lp->operation);
 274                 }
 275                 if (closeopen)
 276                         prt("\n\t\tCLOSE/OPEN");
 277                 prt("\n");
 278                 i++;
 279                 if (i == LOGSIZE)
 280                         i = 0;
 281         }
 282 }
 283
 284
 285 void
 286 save_buffer(char *buffer, off_t bufferlength, int fd)
 287 {
 288         off_t ret;
 289         ssize_t byteswritten;
 290
 291         if (fd <= 0 || bufferlength == 0)
 292                 return;
 293
 294         if (bufferlength > SSIZE_MAX) {
 295                 prt("fsx flaw: overflow in save_buffer\n");
 296                 exit(67);
 297         }
 298         if (lite) {
 299                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 300                 if (size_by_seek == (off_t)-1)
 301                         prterr("save_buffer: lseek eof");
 302                 else if (bufferlength > size_by_seek) {
 303                         warn("save_buffer: .fsxgood file too short... "
 304                              "will save 0x%jx bytes instead of 0x%llx\n",
 305                              (intmax_t)size_by_seek,
 306                              (intmax_t)bufferlength);
 307                         bufferlength = size_by_seek;
 308                 }
 309         }
 310
 311         ret = lseek(fd, (off_t)0, SEEK_SET);
 312         if (ret == (off_t)-1)
 313                 prterr("save_buffer: lseek 0");
 314
 315         byteswritten = write(fd, buffer, (size_t)bufferlength);
 316         if (byteswritten != bufferlength) {
 317                 if (byteswritten == -1)
 318                         prterr("save_buffer write");
 319                 else
 320                         warn("save_buffer: short write, "
 321                              "0x%x bytes instead of 0x%jx\n",
 322                              (unsigned)byteswritten,
 323                              (intmax_t)bufferlength);
 324         }
 325 }
 326
 327
 328 void
 329 report_failure(int status)
 330 {
 331         logdump();
 332
 333         if (fsxgoodfd) {
 334                 if (good_buf) {
 335                         save_buffer(good_buf, file_size, fsxgoodfd);
 336                         prt("Correct content saved for comparison\n");
 337                         prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
 338                             fname, fname);
 339                 }
 340                 close(fsxgoodfd);
 341         }
 342         exit(status);
 343 }
 344
 345
 346 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 347                                         *(((unsigned char *)(cp)) + 1)))
 348
 349 void
 350 check_buffers(unsigned offset, unsigned size)
 351 {
 352         unsigned char c, t;
 353         unsigned i = 0;
 354         unsigned n = 0;
 355         unsigned op = 0;
 356         unsigned bad = 0;
 357
 358         if (memcmp(good_buf + offset, temp_buf, size) != 0) {
 359                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
 360                     offset, size);
 361                 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
 362                 while (size > 0) {
 363                         c = good_buf[offset];
 364                         t = temp_buf[i];
 365                         if (c != t) {
 366                                 if (n == 0) {
 367                                         bad = short_at(&temp_buf[i]);
 368                                         prt("0x%5x\t0x%04x\t0x%04x", offset,
 369                                             short_at(&good_buf[offset]), bad);
 370                                         op = temp_buf[offset & 1 ? i+1 : i];
 371                                 }
 372                                 n++;
 373                                 badoff = offset;
 374                         }
 375                         offset++;
 376                         i++;
 377                         size--;
 378                 }
 379                 if (n) {
 380                         prt("\t0x%5x\n", n);
 381                         if (bad)
 382                                 prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));
 383                         else
 384                                 prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
 385                 } else
 386                         prt("????????????????\n");
 387                 report_failure(110);
 388         }
 389 }
 390
 391
 392 void
 393 check_size(void)
 394 {
 395         struct stat     statbuf;
 396         off_t   size_by_seek;
 397
 398         if (fstat(fd, &statbuf)) {
 399                 prterr("check_size: fstat");
 400                 statbuf.st_size = -1;
 401         }
 402         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 403         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 404                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 405                     (unsigned long long)file_size,
 406                     (unsigned long long)statbuf.st_size,
 407                     (unsigned long long)size_by_seek);
 408                 report_failure(120);
 409         }
 410 }
 411
 412
 413 void
 414 check_trunc_hack(void)
 415 {
 416         struct stat statbuf;
 417
 418         ftruncate(fd, (off_t)0);
 419         ftruncate(fd, (off_t)100000);
 420         fstat(fd, &statbuf);
 421         if (statbuf.st_size != (off_t)100000) {
 422                 prt("no extend on truncate! not posix!\n");
 423                 exit(130);
 424         }
 425         ftruncate(fd, (off_t)0);
 426 }
 427
 428
 429 void
 430 doread(unsigned offset, unsigned size)
 431 {
 432         off_t ret;
 433         unsigned iret;
 434
 435         offset -= offset % readbdy;
 436         if (size == 0) {
 437                 if (!quiet && testcalls > simulatedopcount)
 438                         prt("skipping zero size read\n");
 439                 log4(OP_SKIPPED, OP_READ, offset, size);
 440                 return;
 441         }
 442         if (size + offset > file_size) {
 443                 if (!quiet && testcalls > simulatedopcount)
 444                         prt("skipping seek/read past end of file\n");
 445                 log4(OP_SKIPPED, OP_READ, offset, size);
 446                 return;
 447         }
 448
 449         log4(OP_READ, offset, size, 0);
 450
 451         if (testcalls <= simulatedopcount)
 452                 return;
 453
 454         if (!quiet && ((progressinterval &&
 455                         testcalls % progressinterval == 0) ||
 456                        (debug &&
 457                         (monitorstart == -1 ||
 458                          (offset + size > monitorstart &&
 459                           (monitorend == -1 || offset <= monitorend))))))
 460                 prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 461                     offset, offset + size - 1, size);
 462         ret = lseek(fd, (off_t)offset, SEEK_SET);
 463         if (ret == (off_t)-1) {
 464                 prterr("doread: lseek");
 465                 report_failure(140);
 466         }
 467         iret = read(fd, temp_buf, size);
 468         if (iret != size) {
 469                 if (iret == -1)
 470                         prterr("doread: read");
 471                 else
 472                         prt("short read: 0x%x bytes instead of 0x%x\n",
 473                             iret, size);
 474                 report_failure(141);
 475         }
 476         check_buffers(offset, size);
 477 }
 478
 479
 480 void
 481 check_eofpage(char *s, unsigned offset, char *p, int size)
 482 {
 483         intptr_t last_page, should_be_zero;
 484
 485         if (offset + size <= (file_size & ~page_mask))
 486                 return;
 487         /*
 488          * we landed in the last page of the file
 489          * test to make sure the VM system provided 0's
 490          * beyond the true end of the file mapping
 491          * (as required by mmap def in 1996 posix 1003.1)
 492          */
 493         last_page = ((intptr_t)p + (offset & page_mask) + size) & ~(intptr_t)page_mask;
 494
 495         for (should_be_zero = last_page + (file_size & page_mask);
 496              should_be_zero < last_page + page_size;
 497              should_be_zero++) {
 498                 if (*(char *)should_be_zero) {
 499                         prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
 500                             s, file_size - 1, should_be_zero & page_mask,
 501                             *(char *)(should_be_zero));
 502                         report_failure(205);
 503                 }
 504         }
 505 }
 506
 507
 508 void
 509 domapread(unsigned offset, unsigned size)
 510 {
 511         unsigned pg_offset;
 512         unsigned map_size;
 513         char    *p;
 514
 515         offset -= offset % readbdy;
 516         if (size == 0) {
 517                 if (!quiet && testcalls > simulatedopcount)
 518                         prt("skipping zero size read\n");
 519                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 520                 return;
 521         }
 522         if (size + offset > file_size) {
 523                 if (!quiet && testcalls > simulatedopcount)
 524                         prt("skipping seek/read past end of file\n");
 525                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 526                 return;
 527         }
 528
 529         log4(OP_MAPREAD, offset, size, 0);
 530
 531         if (testcalls <= simulatedopcount)
 532                 return;
 533
 534         if (!quiet && ((progressinterval &&
 535                         testcalls % progressinterval == 0) ||
 536                        (debug &&
 537                         (monitorstart == -1 ||
 538                          (offset + size > monitorstart &&
 539                           (monitorend == -1 || offset <= monitorend))))))
 540                 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 541                     offset, offset + size - 1, size);
 542
 543         pg_offset = offset & page_mask;
 544         map_size  = pg_offset + size;
 545
 546         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
 547                               (off_t)(offset - pg_offset))) == (char *)-1) {
 548                 prterr("domapread: mmap");
 549                 report_failure(190);
 550         }
 551         if (setjmp(jmpbuf) == 0) {
 552             jmpbuf_good = 1;
 553             memcpy(temp_buf, p + pg_offset, size);
 554             check_eofpage("Read", offset, p, size);
 555             jmpbuf_good = 0;
 556         } else {
 557             report_failure(1901);
 558         }
 559
 560         if (munmap(p, map_size) != 0) {
 561                 prterr("domapread: munmap");
 562                 report_failure(191);
 563         }
 564
 565         check_buffers(offset, size);
 566 }
 567
 568
 569 void
 570 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 571 {
 572         while (size--) {
 573                 good_buf[offset] = testcalls % 256;
 574                 if (offset % 2)
 575                         good_buf[offset] += original_buf[offset];
 576                 offset++;
 577         }
 578 }
 579
 580
 581 void
 582 dowrite(unsigned offset, unsigned size)
 583 {
 584         off_t ret;
 585         unsigned iret;
 586
 587         offset -= offset % writebdy;
 588         if (size == 0) {
 589                 if (!quiet && testcalls > simulatedopcount)
 590                         prt("skipping zero size write\n");
 591                 log4(OP_SKIPPED, OP_WRITE, offset, size);
 592                 return;
 593         }
 594
 595         log4(OP_WRITE, offset, size, file_size);
 596
 597         gendata(original_buf, good_buf, offset, size);
 598         if (file_size < offset + size) {
 599                 if (file_size < offset)
 600                         memset(good_buf + file_size, '\0', offset - file_size);
 601                 file_size = offset + size;
 602                 if (lite) {
 603                         warn("Lite file size bug in fsx!");
 604                         report_failure(149);
 605                 }
 606         }
 607
 608         if (testcalls <= simulatedopcount)
 609                 return;
 610
 611         if (!quiet && ((progressinterval &&
 612                         testcalls % progressinterval == 0) ||
 613                        (debug &&
 614                         (monitorstart == -1 ||
 615                          (offset + size > monitorstart &&
 616                           (monitorend == -1 || offset <= monitorend))))))
 617                 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 618                     offset, offset + size - 1, size);
 619         ret = lseek(fd, (off_t)offset, SEEK_SET);
 620         if (ret == (off_t)-1) {
 621                 prterr("dowrite: lseek");
 622                 report_failure(150);
 623         }
 624         iret = write(fd, good_buf + offset, size);
 625         if (iret != size) {
 626                 if (iret == -1)
 627                         prterr("dowrite: write");
 628                 else
 629                         prt("short write: 0x%x bytes instead of 0x%x\n",
 630                             iret, size);
 631                 report_failure(151);
 632         }
 633 }
 634
 635
 636 void
 637 domapwrite(unsigned offset, unsigned size)
 638 {
 639         unsigned pg_offset;
 640         unsigned map_size;
 641         off_t    cur_filesize;
 642         char    *p;
 643
 644         offset -= offset % writebdy;
 645         if (size == 0) {
 646                 if (!quiet && testcalls > simulatedopcount)
 647                         prt("skipping zero size write\n");
 648                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
 649                 return;
 650         }
 651         cur_filesize = file_size;
 652
 653         log4(OP_MAPWRITE, offset, size, 0);
 654
 655         gendata(original_buf, good_buf, offset, size);
 656         if (file_size < offset + size) {
 657                 if (file_size < offset)
 658                         memset(good_buf + file_size, '\0', offset - file_size);
 659                 file_size = offset + size;
 660                 if (lite) {
 661                         warn("Lite file size bug in fsx!");
 662                         report_failure(200);
 663                 }
 664         }
 665
 666         if (testcalls <= simulatedopcount)
 667                 return;
 668
 669         if (!quiet && ((progressinterval &&
 670                         testcalls % progressinterval == 0) ||
 671                        (debug &&
 672                         (monitorstart == -1 ||
 673                          (offset + size > monitorstart &&
 674                           (monitorend == -1 || offset <= monitorend))))))
 675                 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 676                     offset, offset + size - 1, size);
 677
 678         if (file_size > cur_filesize) {
 679                 if (ftruncate(fd, file_size) == -1) {
 680                         prterr("domapwrite: ftruncate");
 681                         exit(201);
 682                 }
 683         }
 684         pg_offset = offset & page_mask;
 685         map_size  = pg_offset + size;
 686
 687         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 688                               MAP_FILE | MAP_SHARED, fd,
 689                               (off_t)(offset - pg_offset))) == (char *)-1) {
 690                 prterr("domapwrite: mmap");
 691                 report_failure(202);
 692         }
 693         if (setjmp(jmpbuf) == 0) {
 694             jmpbuf_good = 1;
 695             memcpy(p + pg_offset, good_buf + offset, size);
 696             if (msync(p, map_size, 0) != 0) {
 697                     prterr("domapwrite: msync");
 698                     report_failure(203);
 699             }
 700             check_eofpage("Write", offset, p, size);
 701             jmpbuf_good = 0;
 702         } else {
 703             report_failure(2021);
 704         }
 705
 706         if (munmap(p, map_size) != 0) {
 707                 prterr("domapwrite: munmap");
 708                 report_failure(204);
 709         }
 710 }
 711
 712
 713 void
 714 dotruncate(unsigned size)
 715 {
 716         int oldsize = file_size;
 717
 718         size -= size % truncbdy;
 719         if (size > biggest) {
 720                 biggest = size;
 721                 if (!quiet && testcalls > simulatedopcount)
 722                         prt("truncating to largest ever: 0x%x\n", size);
 723         }
 724
 725         log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
 726
 727         if (size > file_size)
 728                 memset(good_buf + file_size, '\0', size - file_size);
 729         file_size = size;
 730
 731         if (testcalls <= simulatedopcount)
 732                 return;
 733
 734         if ((progressinterval && testcalls % progressinterval == 0) ||
 735             (debug && (monitorstart == -1 || monitorend == -1 ||
 736                        size <= monitorend)))
 737                 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
 738         if (ftruncate(fd, (off_t)size) == -1) {
 739                 prt("ftruncate1: %x\n", size);
 740                 prterr("dotruncate: ftruncate");
 741                 report_failure(160);
 742         }
 743 }
 744
 745
 746 void
 747 writefileimage()
 748 {
 749         ssize_t iret;
 750
 751         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 752                 prterr("writefileimage: lseek");
 753                 report_failure(171);
 754         }
 755         iret = write(fd, good_buf, file_size);
 756         if ((off_t)iret != file_size) {
 757                 if (iret == -1)
 758                         prterr("writefileimage: write");
 759                 else
 760                         prt("short write: 0x%x bytes instead of 0x%jx\n",
 761                             iret, (intmax_t)file_size);
 762                 report_failure(172);
 763         }
 764         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 765                 prt("ftruncate2: %jx\n", (intmax_t)file_size);
 766                 prterr("writefileimage: ftruncate");
 767                 report_failure(173);
 768         }
 769 }
 770
 771
 772 void
 773 docloseopen(void)
 774 {
 775         if (testcalls <= simulatedopcount)
 776                 return;
 777
 778         if (debug)
 779                 prt("%lu close/open\n", testcalls);
 780         if (close(fd)) {
 781                 prterr("docloseopen: close");
 782                 report_failure(180);
 783         }
 784         fd = open(fname, O_RDWR, 0);
 785         if (fd < 0) {
 786                 prterr("docloseopen: open");
 787                 report_failure(181);
 788         }
 789 }
 790
 791
 792 void
 793 test(void)
 794 {
 795         unsigned long   offset;
 796         unsigned long   size = maxoplen;
 797         unsigned long   rv = random();
 798         unsigned long   op = rv % (3 + !lite + mapped_writes);
 799
 800         /* turn off the map read if necessary */
 801
 802         if (op == 2 && !mapped_reads)
 803             op = 0;
 804
 805         if (simulatedopcount > 0 && testcalls == simulatedopcount)
 806                 writefileimage();
 807
 808         testcalls++;
 809
 810         if (closeprob)
 811                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
 812
 813         if (debugstart > 0 && testcalls >= debugstart)
 814                 debug = 1;
 815
 816         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
 817                 prt("%lu...\n", testcalls);
 818
 819         /*
 820          * READ:        op = 0
 821          * WRITE:       op = 1
 822          * MAPREAD:     op = 2
 823          * TRUNCATE:    op = 3
 824          * MAPWRITE:    op = 3 or 4
 825          */
 826         if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
 827                 dotruncate(random() % maxfilelen);
 828         else {
 829                 if (randomoplen)
 830                         size = random() % (maxoplen+1);
 831                 if (lite ? 0 : op == 3)
 832                         dotruncate(size);
 833                 else {
 834                         offset = random();
 835                         if (op == 1 || op == (lite ? 3 : 4)) {
 836                                 offset %= maxfilelen;
 837                                 if (offset + size > maxfilelen)
 838                                         size = maxfilelen - offset;
 839                                 if (op != 1)
 840                                         domapwrite(offset, size);
 841                                 else
 842                                         dowrite(offset, size);
 843                         } else {
 844                                 if (file_size)
 845                                         offset %= file_size;
 846                                 else
 847                                         offset = 0;
 848                                 if (offset + size > file_size)
 849                                         size = file_size - offset;
 850                                 if (op != 0)
 851                                         domapread(offset, size);
 852                                 else
 853                                         doread(offset, size);
 854                         }
 855                 }
 856         }
 857         if (sizechecks && testcalls > simulatedopcount)
 858                 check_size();
 859         if (closeopen)
 860                 docloseopen();
 861 }
 862
 863 void
 864 segv(int sig)
 865 {
 866         if (jmpbuf_good) {
 867             jmpbuf_good = 0;
 868             longjmp(jmpbuf, 1);
 869         }
 870         report_failure(9999);
 871 }
 872
 873 void
 874 cleanup(sig)
 875         int     sig;
 876 {
 877         if (sig)
 878                 prt("signal %d\n", sig);
 879         prt("testcalls = %lu\n", testcalls);
 880         exit(sig);
 881 }
 882
 883
 884 void
 885 usage(void)
 886 {
 887         fprintf(stdout, "usage: %s",
 888                 "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\
 889         -b opnum: beginning operation number (default 1)\n\
 890         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
 891         -d: debug output for all operations\n\
 892         -l flen: the upper bound on file size (default 262144)\n\
 893         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
 894         -n: no verifications of file size\n\
 895         -o oplen: the upper bound on operation size (default 65536)\n\
 896         -p progressinterval: debug output at specified operation interval\n\
 897         -q: quieter operation\n\
 898         -r readbdy: 4096 would make reads page aligned (default 1)\n\
 899         -s style: 1 gives smaller truncates (default 0)\n\
 900         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
 901         -w writebdy: 4096 would make writes page aligned (default 1)\n\
 902         -D startingop: debug output starting at specified operation\n\
 903         -L: fsxLite - no file creations & no file size changes\n\
 904         -N numops: total # operations to do (default infinity)\n\
 905         -O: use oplen (see -o flag) for every op (default random)\n\
 906         -P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
 907         -S seed: for random # generator (default 1) 0 gets timestamp\n\
 908         -W: mapped write operations DISabled\n\
 909         -R: mapped read operations DISabled)\n\
 910         fname: this filename is REQUIRED (no default)\n");
 911         exit(90);
 912 }
 913
 914
 915 int
 916 getnum(char *s, char **e)
 917 {
 918         int ret = -1;
 919
 920         *e = NULL;
 921         ret = strtol(s, e, 0);
 922         if (*e)
 923                 switch (**e) {
 924                 case 'b':
 925                 case 'B':
 926                         ret *= 512;
 927                         *e = *e + 1;
 928                         break;
 929                 case 'k':
 930                 case 'K':
 931                         ret *= 1024;
 932                         *e = *e + 1;
 933                         break;
 934                 case 'm':
 935                 case 'M':
 936                         ret *= 1024*1024;
 937                         *e = *e + 1;
 938                         break;
 939                 case 'w':
 940                 case 'W':
 941                         ret *= 4;
 942                         *e = *e + 1;
 943                         break;
 944                 }
 945         return (ret);
 946 }
 947
 948
 949 int
 950 main(int argc, char **argv)
 951 {
 952         int     i, ch;
 953         char    *endp;
 954         char goodfile[1024];
 955         char logfile[1024];
 956
 957         goodfile[0] = 0;
 958         logfile[0] = 0;
 959
 960         page_size = getpagesize();
 961         page_mask = page_size - 1;
 962
 963         setvbuf(stdout, NULL, _IOLBF, 0); /* line buffered stdout */
 964
 965         while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))
 966                != EOF)
 967                 switch (ch) {
 968                 case 'b':
 969                         simulatedopcount = getnum(optarg, &endp);
 970                         if (!quiet)
 971                                 fprintf(stdout, "Will begin at operation %ld\n",
 972                                         simulatedopcount);
 973                         if (simulatedopcount == 0)
 974                                 usage();
 975                         simulatedopcount -= 1;
 976                         break;
 977                 case 'c':
 978                         closeprob = getnum(optarg, &endp);
 979                         if (!quiet)
 980                                 fprintf(stdout,
 981                                         "Chance of close/open is 1 in %d\n",
 982                                         closeprob);
 983                         if (closeprob <= 0)
 984                                 usage();
 985                         break;
 986                 case 'd':
 987                         debug = 1;
 988                         break;
 989                 case 'l':
 990                         maxfilelen = getnum(optarg, &endp);
 991                         if (maxfilelen <= 0)
 992                                 usage();
 993                         break;
 994                 case 'm':
 995                         monitorstart = getnum(optarg, &endp);
 996                         if (monitorstart < 0)
 997                                 usage();
 998                         if (!endp || *endp++ != ':')
 999                                 usage();
1000                         monitorend = getnum(endp, &endp);
1001                         if (monitorend < 0)
1002                                 usage();
1003                         if (monitorend == 0)
1004                                 monitorend = -1; /* aka infinity */
1005                         debug = 1;
1006                 case 'n':
1007                         sizechecks = 0;
1008                         break;
1009                 case 'o':
1010                         maxoplen = getnum(optarg, &endp);
1011                         if (maxoplen <= 0)
1012                                 usage();
1013                         break;
1014                 case 'p':
1015                         progressinterval = getnum(optarg, &endp);
1016                         if (progressinterval < 0)
1017                                 usage();
1018                         break;
1019                 case 'q':
1020                         quiet = 1;
1021                         break;
1022                 case 'r':
1023                         readbdy = getnum(optarg, &endp);
1024                         if (readbdy <= 0)
1025                                 usage();
1026                         break;
1027                 case 's':
1028                         style = getnum(optarg, &endp);
1029                         if (style < 0 || style > 1)
1030                                 usage();
1031                         break;
1032                 case 't':
1033                         truncbdy = getnum(optarg, &endp);
1034                         if (truncbdy <= 0)
1035                                 usage();
1036                         break;
1037                 case 'w':
1038                         writebdy = getnum(optarg, &endp);
1039                         if (writebdy <= 0)
1040                                 usage();
1041                         break;
1042                 case 'D':
1043                         debugstart = getnum(optarg, &endp);
1044                         if (debugstart < 1)
1045                                 usage();
1046                         break;
1047                 case 'L':
1048                         lite = 1;
1049                         break;
1050                 case 'N':
1051                         numops = getnum(optarg, &endp);
1052                         if (numops < 0)
1053                                 usage();
1054                         break;
1055                 case 'O':
1056                         randomoplen = 0;
1057                         break;
1058                 case 'P':
1059                         strncpy(goodfile, optarg, sizeof(goodfile));
1060                         strcat(goodfile, "/");
1061                         strncpy(logfile, optarg, sizeof(logfile));
1062                         strcat(logfile, "/");
1063                         break;
1064                 case 'R':
1065                         mapped_reads = 0;
1066                         break;
1067                 case 'S':
1068                         seed = getnum(optarg, &endp);
1069                         if (seed == 0)
1070                                 seed = time(0) % 10000;
1071                         if (!quiet)
1072                                 fprintf(stdout, "Seed set to %d\n", seed);
1073                         if (seed < 0)
1074                                 usage();
1075                         break;
1076                 case 'W':
1077                         mapped_writes = 0;
1078                         if (!quiet)
1079                                 fprintf(stdout, "mapped writes DISABLED\n");
1080                         break;
1081
1082                 default:
1083                         usage();
1084                         /* NOTREACHED */
1085                 }
1086         argc -= optind;
1087         argv += optind;
1088         if (argc != 1)
1089                 usage();
1090         fname = argv[0];
1091
1092         signal(SIGHUP,  cleanup);
1093         signal(SIGINT,  cleanup);
1094         signal(SIGPIPE, cleanup);
1095         signal(SIGALRM, cleanup);
1096         signal(SIGTERM, cleanup);
1097         signal(SIGXCPU, cleanup);
1098         signal(SIGXFSZ, cleanup);
1099         signal(SIGVTALRM,       cleanup);
1100         signal(SIGUSR1, cleanup);
1101         signal(SIGUSR2, cleanup);
1102         signal(SIGSEGV, segv);
1103
1104         initstate(seed, state, 256);
1105         setstate(state);
1106         fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1107         if (fd < 0) {
1108                 prterr(fname);
1109                 exit(91);
1110         }
1111         strncat(goodfile, fname, 256);
1112         strcat (goodfile, ".fsxgood");
1113         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1114         if (fsxgoodfd < 0) {
1115                 prterr(goodfile);
1116                 exit(92);
1117         }
1118         strncat(logfile, fname, 256);
1119         strcat (logfile, ".fsxlog");
1120         fsxlogf = fopen(logfile, "w");
1121         if (fsxlogf == NULL) {
1122                 prterr(logfile);
1123                 exit(93);
1124         }
1125         if (lite) {
1126                 off_t ret;
1127                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1128                 if (file_size == (off_t)-1) {
1129                         prterr(fname);
1130                         warn("main: lseek eof");
1131                         exit(94);
1132                 }
1133                 ret = lseek(fd, (off_t)0, SEEK_SET);
1134                 if (ret == (off_t)-1) {
1135                         prterr(fname);
1136                         warn("main: lseek 0");
1137                         exit(95);
1138                 }
1139         }
1140         original_buf = (char *) malloc(maxfilelen);
1141         for (i = 0; i < maxfilelen; i++)
1142                 original_buf[i] = random() % 256;
1143         good_buf = (char *) malloc(maxfilelen);
1144         memset(good_buf, '\0', maxfilelen);
1145         temp_buf = (char *) malloc(maxoplen);
1146         memset(temp_buf, '\0', maxoplen);
1147         if (lite) {     /* zero entire existing file */
1148                 ssize_t written;
1149
1150                 written = write(fd, good_buf, (size_t)maxfilelen);
1151                 if (written != maxfilelen) {
1152                         if (written == -1) {
1153                                 prterr(fname);
1154                                 warn("main: error on write");
1155                         } else
1156                                 warn("main: short write, 0x%x bytes instead of 0x%x\n",
1157                                      (unsigned)written, maxfilelen);
1158                         exit(98);
1159                 }
1160         } else
1161                 check_trunc_hack();
1162
1163         while (numops == -1 || numops--)
1164                 test();
1165
1166         if (close(fd)) {
1167                 prterr("close");
1168                 report_failure(99);
1169         }
1170         prt("All operations completed A-OK!\n");
1171
1172         exit(0);
1173         return 0;
1174 }
1175