tools/regression/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 2.0 (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.opensource.apple.com/apsl/ 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  *      Updated license to APSL 2.0, 2004/7/27 - Jordan Hubbard
  38  *
  39  * $FreeBSD$
  40  *
  41  */
  42
  43 #include <sys/types.h>
  44 #include <sys/stat.h>
  45 #ifdef _UWIN
  46 # include <sys/param.h>
  47 # include <limits.h>
  48 # include <time.h>
  49 # include <strings.h>
  50 #endif
  51 #include <fcntl.h>
  52 #include <sys/mman.h>
  53 #ifndef MAP_FILE
  54 # define MAP_FILE 0
  55 #endif
  56 #include <limits.h>
  57 #include <signal.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <unistd.h>
  62 #include <stdarg.h>
  63 #include <errno.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
  82 /*
  83  *      Define operations
  84  */
  85
  86 #define OP_READ         1
  87 #define OP_WRITE        2
  88 #define OP_TRUNCATE     3
  89 #define OP_CLOSEOPEN    4
  90 #define OP_MAPREAD      5
  91 #define OP_MAPWRITE     6
  92 #define OP_SKIPPED      7
  93
  94 int page_size;
  95 int page_mask;
  96
  97 char    *original_buf;                  /* a pointer to the original data */
  98 char    *good_buf;                      /* a pointer to the correct data */
  99 char    *temp_buf;                      /* a pointer to the current data */
 100 char    *fname;                         /* name of our test file */
 101 int     fd;                             /* fd for our test file */
 102
 103 off_t           file_size = 0;
 104 off_t           biggest = 0;
 105 char            state[256];
 106 unsigned long   testcalls = 0;          /* calls to function "test" */
 107
 108 unsigned long   simulatedopcount = 0;   /* -b flag */
 109 int     closeprob = 0;                  /* -c flag */
 110 int     debug = 0;                      /* -d flag */
 111 unsigned long   debugstart = 0;         /* -D flag */
 112 unsigned long   maxfilelen = 256 * 1024;        /* -l flag */
 113 int     sizechecks = 1;                 /* -n flag disables them */
 114 int     maxoplen = 64 * 1024;           /* -o flag */
 115 int     quiet = 0;                      /* -q flag */
 116 unsigned long progressinterval = 0;     /* -p flag */
 117 int     readbdy = 1;                    /* -r flag */
 118 int     style = 0;                      /* -s flag */
 119 int     truncbdy = 1;                   /* -t flag */
 120 int     writebdy = 1;                   /* -w flag */
 121 long    monitorstart = -1;              /* -m flag */
 122 long    monitorend = -1;                /* -m flag */
 123 int     lite = 0;                       /* -L flag */
 124 long    numops = -1;                    /* -N flag */
 125 int     randomoplen = 1;                /* -O flag disables it */
 126 int     seed = 1;                       /* -S flag */
 127 int     mapped_writes = 1;            /* -W flag disables */
 128 int     mapped_reads = 1;               /* -R flag disables it */
 129 int     fsxgoodfd = 0;
 130 FILE *  fsxlogf = NULL;
 131 int badoff = -1;
 132 int closeopen = 0;
 133
 134
 135 void
 136 vwarnc(code, fmt, ap)
 137         int code;
 138         const char *fmt;
 139         va_list ap;
 140 {
 141         fprintf(stderr, "fsx: ");
 142         if (fmt != NULL) {
 143                 vfprintf(stderr, fmt, ap);
 144                 fprintf(stderr, ": ");
 145         }
 146         fprintf(stderr, "%s\n", strerror(code));
 147 }
 148
 149
 150 void
 151 warn(const char * fmt, ...)
 152 {
 153         va_list ap;
 154         va_start(ap, fmt);
 155         vwarnc(errno, fmt, ap);
 156         va_end(ap);
 157 }
 158
 159
 160 void
 161 prt(char *fmt, ...)
 162 {
 163         va_list args;
 164
 165         va_start(args, fmt);
 166         vfprintf(stdout, fmt, args);
 167         va_end(args);
 168
 169         if (fsxlogf) {
 170                 va_start(args, fmt);
 171                 vfprintf(fsxlogf, fmt, args);
 172                 va_end(args);
 173         }
 174 }
 175
 176 void
 177 prterr(char *prefix)
 178 {
 179         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 180 }
 181
 182
 183 void
 184 log4(int operation, int arg0, int arg1, int arg2)
 185 {
 186         struct log_entry *le;
 187
 188         le = &oplog[logptr];
 189         le->operation = operation;
 190         if (closeopen)
 191                 le->operation = ~ le->operation;
 192         le->args[0] = arg0;
 193         le->args[1] = arg1;
 194         le->args[2] = arg2;
 195         logptr++;
 196         logcount++;
 197         if (logptr >= LOGSIZE)
 198                 logptr = 0;
 199 }
 200
 201
 202 void
 203 logdump(void)
 204 {
 205         int     i, count, down;
 206         struct log_entry        *lp;
 207
 208         prt("LOG DUMP (%d total operations):\n", logcount);
 209         if (logcount < LOGSIZE) {
 210                 i = 0;
 211                 count = logcount;
 212         } else {
 213                 i = logptr;
 214                 count = LOGSIZE;
 215         }
 216         for ( ; count > 0; count--) {
 217                 int opnum;
 218
 219                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 220                 prt("%d(%d mod 256): ", opnum, opnum%256);
 221                 lp = &oplog[i];
 222                 if ((closeopen = lp->operation < 0))
 223                         lp->operation = ~ lp->operation;
 224
 225                 switch (lp->operation) {
 226                 case OP_MAPREAD:
 227                         prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
 228                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 229                             lp->args[1]);
 230                         if (badoff >= lp->args[0] && badoff <
 231                                                      lp->args[0] + lp->args[1])
 232                                 prt("\t***RRRR***");
 233                         break;
 234                 case OP_MAPWRITE:
 235                         prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
 236                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 237                             lp->args[1]);
 238                         if (badoff >= lp->args[0] && badoff <
 239                                                      lp->args[0] + lp->args[1])
 240                                 prt("\t******WWWW");
 241                         break;
 242                 case OP_READ:
 243                         prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
 244                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 245                             lp->args[1]);
 246                         if (badoff >= lp->args[0] &&
 247                             badoff < lp->args[0] + lp->args[1])
 248                                 prt("\t***RRRR***");
 249                         break;
 250                 case OP_WRITE:
 251                         prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
 252                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 253                             lp->args[1]);
 254                         if (lp->args[0] > lp->args[2])
 255                                 prt(" HOLE");
 256                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 257                                 prt(" EXTEND");
 258                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
 259                             badoff < lp->args[0] + lp->args[1])
 260                                 prt("\t***WWWW");
 261                         break;
 262                 case OP_TRUNCATE:
 263                         down = lp->args[0] < lp->args[1];
 264                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 265                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
 266                         if (badoff >= lp->args[!down] &&
 267                             badoff < lp->args[!!down])
 268                                 prt("\t******WWWW");
 269                         break;
 270                 case OP_SKIPPED:
 271                         prt("SKIPPED (no operation)");
 272                         break;
 273                 default:
 274                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 275                             lp->operation);
 276                 }
 277                 if (closeopen)
 278                         prt("\n\t\tCLOSE/OPEN");
 279                 prt("\n");
 280                 i++;
 281                 if (i == LOGSIZE)
 282                         i = 0;
 283         }
 284 }
 285
 286
 287 void
 288 save_buffer(char *buffer, off_t bufferlength, int fd)
 289 {
 290         off_t ret;
 291         ssize_t byteswritten;
 292
 293         if (fd <= 0 || bufferlength == 0)
 294                 return;
 295
 296         if (bufferlength > SSIZE_MAX) {
 297                 prt("fsx flaw: overflow in save_buffer\n");
 298                 exit(67);
 299         }
 300         if (lite) {
 301                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 302                 if (size_by_seek == (off_t)-1)
 303                         prterr("save_buffer: lseek eof");
 304                 else if (bufferlength > size_by_seek) {
 305                         warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
 306                              (unsigned long long)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, 0x%x bytes instead of 0x%llx\n",
 321                              (unsigned)byteswritten,
 322                              (unsigned long long)bufferlength);
 323         }
 324 }
 325
 326
 327 void
 328 report_failure(int status)
 329 {
 330         logdump();
 331
 332         if (fsxgoodfd) {
 333                 if (good_buf) {
 334                         save_buffer(good_buf, file_size, fsxgoodfd);
 335                         prt("Correct content saved for comparison\n");
 336                         prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
 337                             fname, fname);
 338                 }
 339                 close(fsxgoodfd);
 340         }
 341         exit(status);
 342 }
 343
 344
 345 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 346                                         *(((unsigned char *)(cp)) + 1)))
 347
 348 void
 349 check_buffers(unsigned offset, unsigned size)
 350 {
 351         unsigned char c, t;
 352         unsigned i = 0;
 353         unsigned n = 0;
 354         unsigned op = 0;
 355         unsigned bad = 0;
 356
 357         if (memcmp(good_buf + offset, temp_buf, size) != 0) {
 358                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
 359                     offset, size);
 360                 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
 361                 while (size > 0) {
 362                         c = good_buf[offset];
 363                         t = temp_buf[i];
 364                         if (c != t) {
 365                                 if (n == 0) {
 366                                         bad = short_at(&temp_buf[i]);
 367                                         prt("0x%5x\t0x%04x\t0x%04x", offset,
 368                                             short_at(&good_buf[offset]), bad);
 369                                         op = temp_buf[offset & 1 ? i+1 : i];
 370                                 }
 371                                 n++;
 372                                 badoff = offset;
 373                         }
 374                         offset++;
 375                         i++;
 376                         size--;
 377                 }
 378                 if (n) {
 379                         prt("\t0x%5x\n", n);
 380                         if (bad)
 381                                 prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));
 382                         else
 383                                 prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
 384                 } else
 385                         prt("????????????????\n");
 386                 report_failure(110);
 387         }
 388 }
 389
 390
 391 void
 392 check_size(void)
 393 {
 394         struct stat     statbuf;
 395         off_t   size_by_seek;
 396
 397         if (fstat(fd, &statbuf)) {
 398                 prterr("check_size: fstat");
 399                 statbuf.st_size = -1;
 400         }
 401         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 402         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 403                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 404                     (unsigned long long)file_size,
 405                     (unsigned long long)statbuf.st_size,
 406                     (unsigned long long)size_by_seek);
 407                 report_failure(120);
 408         }
 409 }
 410
 411
 412 void
 413 check_trunc_hack(void)
 414 {
 415         struct stat statbuf;
 416
 417         ftruncate(fd, (off_t)0);
 418         ftruncate(fd, (off_t)100000);
 419         fstat(fd, &statbuf);
 420         if (statbuf.st_size != (off_t)100000) {
 421                 prt("no extend on truncate! not posix!\n");
 422                 exit(130);
 423         }
 424         ftruncate(fd, (off_t)0);
 425 }
 426
 427
 428 void
 429 doread(unsigned offset, unsigned size)
 430 {
 431         off_t ret;
 432         unsigned iret;
 433
 434         offset -= offset % readbdy;
 435         if (size == 0) {
 436                 if (!quiet && testcalls > simulatedopcount)
 437                         prt("skipping zero size read\n");
 438                 log4(OP_SKIPPED, OP_READ, offset, size);
 439                 return;
 440         }
 441         if (size + offset > file_size) {
 442                 if (!quiet && testcalls > simulatedopcount)
 443                         prt("skipping seek/read past end of file\n");
 444                 log4(OP_SKIPPED, OP_READ, offset, size);
 445                 return;
 446         }
 447
 448         log4(OP_READ, offset, size, 0);
 449
 450         if (testcalls <= simulatedopcount)
 451                 return;
 452
 453         if (!quiet && ((progressinterval &&
 454                         testcalls % progressinterval == 0) ||
 455                        (debug &&
 456                         (monitorstart == -1 ||
 457                          (offset + size > monitorstart &&
 458                           (monitorend == -1 || offset <= monitorend))))))
 459                 prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 460                     offset, offset + size - 1, size);
 461         ret = lseek(fd, (off_t)offset, SEEK_SET);
 462         if (ret == (off_t)-1) {
 463                 prterr("doread: lseek");
 464                 report_failure(140);
 465         }
 466         iret = read(fd, temp_buf, size);
 467         if (iret != size) {
 468                 if (iret == -1)
 469                         prterr("doread: read");
 470                 else
 471                         prt("short read: 0x%x bytes instead of 0x%x\n",
 472                             iret, size);
 473                 report_failure(141);
 474         }
 475         check_buffers(offset, size);
 476 }
 477
 478
 479 void
 480 check_eofpage(char *s, unsigned offset, char *p, int size)
 481 {
 482         uintptr_t last_page, should_be_zero;
 483
 484         if (offset + size <= (file_size & ~page_mask))
 485                 return;
 486         /*
 487          * we landed in the last page of the file
 488          * test to make sure the VM system provided 0's
 489          * beyond the true end of the file mapping
 490          * (as required by mmap def in 1996 posix 1003.1)
 491          */
 492         last_page = ((uintptr_t)p + (offset & page_mask) + size) & ~page_mask;
 493
 494         for (should_be_zero = last_page + (file_size & page_mask);
 495              should_be_zero < last_page + page_size;
 496              should_be_zero++)
 497                 if (*(char *)should_be_zero) {
 498                         prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
 499                             s, file_size - 1, should_be_zero & page_mask,
 500                             short_at(should_be_zero));
 501                         report_failure(205);
 502                 }
 503 }
 504
 505
 506 void
 507 domapread(unsigned offset, unsigned size)
 508 {
 509         unsigned pg_offset;
 510         unsigned map_size;
 511         char    *p;
 512
 513         offset -= offset % readbdy;
 514         if (size == 0) {
 515                 if (!quiet && testcalls > simulatedopcount)
 516                         prt("skipping zero size read\n");
 517                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 518                 return;
 519         }
 520         if (size + offset > file_size) {
 521                 if (!quiet && testcalls > simulatedopcount)
 522                         prt("skipping seek/read past end of file\n");
 523                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 524                 return;
 525         }
 526
 527         log4(OP_MAPREAD, offset, size, 0);
 528
 529         if (testcalls <= simulatedopcount)
 530                 return;
 531
 532         if (!quiet && ((progressinterval &&
 533                         testcalls % progressinterval == 0) ||
 534                        (debug &&
 535                         (monitorstart == -1 ||
 536                          (offset + size > monitorstart &&
 537                           (monitorend == -1 || offset <= monitorend))))))
 538                 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 539                     offset, offset + size - 1, size);
 540
 541         pg_offset = offset & page_mask;
 542         map_size  = pg_offset + size;
 543
 544         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
 545                               (off_t)(offset - pg_offset))) == (char *)-1) {
 546                 prterr("domapread: mmap");
 547                 report_failure(190);
 548         }
 549         memcpy(temp_buf, p + pg_offset, size);
 550
 551         check_eofpage("Read", offset, p, size);
 552
 553         if (munmap(p, map_size) != 0) {
 554                 prterr("domapread: munmap");
 555                 report_failure(191);
 556         }
 557
 558         check_buffers(offset, size);
 559 }
 560
 561
 562 void
 563 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 564 {
 565         while (size--) {
 566                 good_buf[offset] = testcalls % 256;
 567                 if (offset % 2)
 568                         good_buf[offset] += original_buf[offset];
 569                 offset++;
 570         }
 571 }
 572
 573
 574 void
 575 dowrite(unsigned offset, unsigned size)
 576 {
 577         off_t ret;
 578         unsigned iret;
 579
 580         offset -= offset % writebdy;
 581         if (size == 0) {
 582                 if (!quiet && testcalls > simulatedopcount)
 583                         prt("skipping zero size write\n");
 584                 log4(OP_SKIPPED, OP_WRITE, offset, size);
 585                 return;
 586         }
 587
 588         log4(OP_WRITE, offset, size, file_size);
 589
 590         gendata(original_buf, good_buf, offset, size);
 591         if (file_size < offset + size) {
 592                 if (file_size < offset)
 593                         memset(good_buf + file_size, '\0', offset - file_size);
 594                 file_size = offset + size;
 595                 if (lite) {
 596                         warn("Lite file size bug in fsx!");
 597                         report_failure(149);
 598                 }
 599         }
 600
 601         if (testcalls <= simulatedopcount)
 602                 return;
 603
 604         if (!quiet && ((progressinterval &&
 605                         testcalls % progressinterval == 0) ||
 606                        (debug &&
 607                         (monitorstart == -1 ||
 608                          (offset + size > monitorstart &&
 609                           (monitorend == -1 || offset <= monitorend))))))
 610                 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 611                     offset, offset + size - 1, size);
 612         ret = lseek(fd, (off_t)offset, SEEK_SET);
 613         if (ret == (off_t)-1) {
 614                 prterr("dowrite: lseek");
 615                 report_failure(150);
 616         }
 617         iret = write(fd, good_buf + offset, size);
 618         if (iret != size) {
 619                 if (iret == -1)
 620                         prterr("dowrite: write");
 621                 else
 622                         prt("short write: 0x%x bytes instead of 0x%x\n",
 623                             iret, size);
 624                 report_failure(151);
 625         }
 626 }
 627
 628
 629 void
 630 domapwrite(unsigned offset, unsigned size)
 631 {
 632         unsigned pg_offset;
 633         unsigned map_size;
 634         off_t    cur_filesize;
 635         char    *p;
 636
 637         offset -= offset % writebdy;
 638         if (size == 0) {
 639                 if (!quiet && testcalls > simulatedopcount)
 640                         prt("skipping zero size write\n");
 641                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
 642                 return;
 643         }
 644         cur_filesize = file_size;
 645
 646         log4(OP_MAPWRITE, offset, size, 0);
 647
 648         gendata(original_buf, good_buf, offset, size);
 649         if (file_size < offset + size) {
 650                 if (file_size < offset)
 651                         memset(good_buf + file_size, '\0', offset - file_size);
 652                 file_size = offset + size;
 653                 if (lite) {
 654                         warn("Lite file size bug in fsx!");
 655                         report_failure(200);
 656                 }
 657         }
 658
 659         if (testcalls <= simulatedopcount)
 660                 return;
 661
 662         if (!quiet && ((progressinterval &&
 663                         testcalls % progressinterval == 0) ||
 664                        (debug &&
 665                         (monitorstart == -1 ||
 666                          (offset + size > monitorstart &&
 667                           (monitorend == -1 || offset <= monitorend))))))
 668                 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 669                     offset, offset + size - 1, size);
 670
 671         if (file_size > cur_filesize) {
 672                 if (ftruncate(fd, file_size) == -1) {
 673                         prterr("domapwrite: ftruncate");
 674                         exit(201);
 675                 }
 676         }
 677         pg_offset = offset & page_mask;
 678         map_size  = pg_offset + size;
 679
 680         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 681                               MAP_FILE | MAP_SHARED, fd,
 682                               (off_t)(offset - pg_offset))) == (char *)-1) {
 683                 prterr("domapwrite: mmap");
 684                 report_failure(202);
 685         }
 686         memcpy(p + pg_offset, good_buf + offset, size);
 687         if (msync(p, map_size, 0) != 0) {
 688                 prterr("domapwrite: msync");
 689                 report_failure(203);
 690         }
 691
 692         check_eofpage("Write", offset, p, size);
 693
 694         if (munmap(p, map_size) != 0) {
 695                 prterr("domapwrite: munmap");
 696                 report_failure(204);
 697         }
 698 }
 699
 700
 701 void
 702 dotruncate(unsigned size)
 703 {
 704         int oldsize = file_size;
 705
 706         size -= size % truncbdy;
 707         if (size > biggest) {
 708                 biggest = size;
 709                 if (!quiet && testcalls > simulatedopcount)
 710                         prt("truncating to largest ever: 0x%x\n", size);
 711         }
 712
 713         log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
 714
 715         if (size > file_size)
 716                 memset(good_buf + file_size, '\0', size - file_size);
 717         file_size = size;
 718
 719         if (testcalls <= simulatedopcount)
 720                 return;
 721
 722         if ((progressinterval && testcalls % progressinterval == 0) ||
 723             (debug && (monitorstart == -1 || monitorend == -1 ||
 724                        size <= monitorend)))
 725                 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
 726         if (ftruncate(fd, (off_t)size) == -1) {
 727                 prt("ftruncate1: %x\n", size);
 728                 prterr("dotruncate: ftruncate");
 729                 report_failure(160);
 730         }
 731 }
 732
 733
 734 void
 735 writefileimage()
 736 {
 737         ssize_t iret;
 738
 739         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 740                 prterr("writefileimage: lseek");
 741                 report_failure(171);
 742         }
 743         iret = write(fd, good_buf, file_size);
 744         if ((off_t)iret != file_size) {
 745                 if (iret == -1)
 746                         prterr("writefileimage: write");
 747                 else
 748                         prt("short write: 0x%x bytes instead of 0x%llx\n",
 749                             iret, (unsigned long long)file_size);
 750                 report_failure(172);
 751         }
 752         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 753                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
 754                 prterr("writefileimage: ftruncate");
 755                 report_failure(173);
 756         }
 757 }
 758
 759
 760 void
 761 docloseopen(void)
 762 {
 763         if (testcalls <= simulatedopcount)
 764                 return;
 765
 766         if (debug)
 767                 prt("%lu close/open\n", testcalls);
 768         if (close(fd)) {
 769                 prterr("docloseopen: close");
 770                 report_failure(180);
 771         }
 772         fd = open(fname, O_RDWR, 0);
 773         if (fd < 0) {
 774                 prterr("docloseopen: open");
 775                 report_failure(181);
 776         }
 777 }
 778
 779
 780 void
 781 test(void)
 782 {
 783         unsigned long   offset;
 784         unsigned long   size = maxoplen;
 785         unsigned long   rv = random();
 786         unsigned long   op = rv % (3 + !lite + mapped_writes);
 787
 788         /* turn off the map read if necessary */
 789
 790         if (op == 2 && !mapped_reads)
 791             op = 0;
 792
 793         if (simulatedopcount > 0 && testcalls == simulatedopcount)
 794                 writefileimage();
 795
 796         testcalls++;
 797
 798         if (closeprob)
 799                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
 800
 801         if (debugstart > 0 && testcalls >= debugstart)
 802                 debug = 1;
 803
 804         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
 805                 prt("%lu...\n", testcalls);
 806
 807         /*
 808          * READ:        op = 0
 809          * WRITE:       op = 1
 810          * MAPREAD:     op = 2
 811          * TRUNCATE:    op = 3
 812          * MAPWRITE:    op = 3 or 4
 813          */
 814         if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
 815                 dotruncate(random() % maxfilelen);
 816         else {
 817                 if (randomoplen)
 818                         size = random() % (maxoplen+1);
 819                 if (lite ? 0 : op == 3)
 820                         dotruncate(size);
 821                 else {
 822                         offset = random();
 823                         if (op == 1 || op == (lite ? 3 : 4)) {
 824                                 offset %= maxfilelen;
 825                                 if (offset + size > maxfilelen)
 826                                         size = maxfilelen - offset;
 827                                 if (op != 1)
 828                                         domapwrite(offset, size);
 829                                 else
 830                                         dowrite(offset, size);
 831                         } else {
 832                                 if (file_size)
 833                                         offset %= file_size;
 834                                 else
 835                                         offset = 0;
 836                                 if (offset + size > file_size)
 837                                         size = file_size - offset;
 838                                 if (op != 0)
 839                                         domapread(offset, size);
 840                                 else
 841                                         doread(offset, size);
 842                         }
 843                 }
 844         }
 845         if (sizechecks && testcalls > simulatedopcount)
 846                 check_size();
 847         if (closeopen)
 848                 docloseopen();
 849 }
 850
 851
 852 void
 853 cleanup(sig)
 854         int     sig;
 855 {
 856         if (sig)
 857                 prt("signal %d\n", sig);
 858         prt("testcalls = %lu\n", testcalls);
 859         exit(sig);
 860 }
 861
 862
 863 void
 864 usage(void)
 865 {
 866         fprintf(stdout, "usage: %s",
 867                 "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\
 868         -b opnum: beginning operation number (default 1)\n\
 869         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
 870         -d: debug output for all operations\n\
 871         -l flen: the upper bound on file size (default 262144)\n\
 872         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
 873         -n: no verifications of file size\n\
 874         -o oplen: the upper bound on operation size (default 65536)\n\
 875         -p progressinterval: debug output at specified operation interval\n\
 876         -q: quieter operation\n\
 877         -r readbdy: 4096 would make reads page aligned (default 1)\n\
 878         -s style: 1 gives smaller truncates (default 0)\n\
 879         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
 880         -w writebdy: 4096 would make writes page aligned (default 1)\n\
 881         -D startingop: debug output starting at specified operation\n\
 882         -L: fsxLite - no file creations & no file size changes\n\
 883         -N numops: total # operations to do (default infinity)\n\
 884         -O: use oplen (see -o flag) for every op (default random)\n\
 885         -P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
 886         -S seed: for random # generator (default 1) 0 gets timestamp\n\
 887         -W: mapped write operations DISabled\n\
 888         -R: mapped read operations DISabled)\n\
 889         fname: this filename is REQUIRED (no default)\n");
 890         exit(90);
 891 }
 892
 893
 894 int
 895 getnum(char *s, char **e)
 896 {
 897         int ret = -1;
 898
 899         *e = (char *) 0;
 900         ret = strtol(s, e, 0);
 901         if (*e)
 902                 switch (**e) {
 903                 case 'b':
 904                 case 'B':
 905                         ret *= 512;
 906                         *e = *e + 1;
 907                         break;
 908                 case 'k':
 909                 case 'K':
 910                         ret *= 1024;
 911                         *e = *e + 1;
 912                         break;
 913                 case 'm':
 914                 case 'M':
 915                         ret *= 1024*1024;
 916                         *e = *e + 1;
 917                         break;
 918                 case 'w':
 919                 case 'W':
 920                         ret *= 4;
 921                         *e = *e + 1;
 922                         break;
 923                 }
 924         return (ret);
 925 }
 926
 927
 928 int
 929 main(int argc, char **argv)
 930 {
 931         int     i, ch;
 932         char    *endp;
 933         char goodfile[1024];
 934         char logfile[1024];
 935
 936         goodfile[0] = 0;
 937         logfile[0] = 0;
 938
 939         page_size = getpagesize();
 940         page_mask = page_size - 1;
 941
 942         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
 943
 944         while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))
 945                != -1)
 946                 switch (ch) {
 947                 case 'b':
 948                         simulatedopcount = getnum(optarg, &endp);
 949                         if (!quiet)
 950                                 fprintf(stdout, "Will begin at operation %ld\n",
 951                                         simulatedopcount);
 952                         if (simulatedopcount == 0)
 953                                 usage();
 954                         simulatedopcount -= 1;
 955                         break;
 956                 case 'c':
 957                         closeprob = getnum(optarg, &endp);
 958                         if (!quiet)
 959                                 fprintf(stdout,
 960                                         "Chance of close/open is 1 in %d\n",
 961                                         closeprob);
 962                         if (closeprob <= 0)
 963                                 usage();
 964                         break;
 965                 case 'd':
 966                         debug = 1;
 967                         break;
 968                 case 'l':
 969                         maxfilelen = getnum(optarg, &endp);
 970                         if (maxfilelen <= 0)
 971                                 usage();
 972                         break;
 973                 case 'm':
 974                         monitorstart = getnum(optarg, &endp);
 975                         if (monitorstart < 0)
 976                                 usage();
 977                         if (!endp || *endp++ != ':')
 978                                 usage();
 979                         monitorend = getnum(endp, &endp);
 980                         if (monitorend < 0)
 981                                 usage();
 982                         if (monitorend == 0)
 983                                 monitorend = -1; /* aka infinity */
 984                         debug = 1;
 985                 case 'n':
 986                         sizechecks = 0;
 987                         break;
 988                 case 'o':
 989                         maxoplen = getnum(optarg, &endp);
 990                         if (maxoplen <= 0)
 991                                 usage();
 992                         break;
 993                 case 'p':
 994                         progressinterval = getnum(optarg, &endp);
 995                         if (progressinterval < 0)
 996                                 usage();
 997                         break;
 998                 case 'q':
 999                         quiet = 1;
1000                         break;
1001                 case 'r':
1002                         readbdy = getnum(optarg, &endp);
1003                         if (readbdy <= 0)
1004                                 usage();
1005                         break;
1006                 case 's':
1007                         style = getnum(optarg, &endp);
1008                         if (style < 0 || style > 1)
1009                                 usage();
1010                         break;
1011                 case 't':
1012                         truncbdy = getnum(optarg, &endp);
1013                         if (truncbdy <= 0)
1014                                 usage();
1015                         break;
1016                 case 'w':
1017                         writebdy = getnum(optarg, &endp);
1018                         if (writebdy <= 0)
1019                                 usage();
1020                         break;
1021                 case 'D':
1022                         debugstart = getnum(optarg, &endp);
1023                         if (debugstart < 1)
1024                                 usage();
1025                         break;
1026                 case 'L':
1027                         lite = 1;
1028                         break;
1029                 case 'N':
1030                         numops = getnum(optarg, &endp);
1031                         if (numops < 0)
1032                                 usage();
1033                         break;
1034                 case 'O':
1035                         randomoplen = 0;
1036                         break;
1037                 case 'P':
1038                         strncpy(goodfile, optarg, sizeof(goodfile));
1039                         strcat(goodfile, "/");
1040                         strncpy(logfile, optarg, sizeof(logfile));
1041                         strcat(logfile, "/");
1042                         break;
1043                 case 'R':
1044                         mapped_reads = 0;
1045                         break;
1046                 case 'S':
1047                         seed = getnum(optarg, &endp);
1048                         if (seed == 0)
1049                                 seed = time(0) % 10000;
1050                         if (!quiet)
1051                                 fprintf(stdout, "Seed set to %d\n", seed);
1052                         if (seed < 0)
1053                                 usage();
1054                         break;
1055                 case 'W':
1056                         mapped_writes = 0;
1057                         if (!quiet)
1058                                 fprintf(stdout, "mapped writes DISABLED\n");
1059                         break;
1060
1061                 default:
1062                         usage();
1063                         /* NOTREACHED */
1064                 }
1065         argc -= optind;
1066         argv += optind;
1067         if (argc != 1)
1068                 usage();
1069         fname = argv[0];
1070
1071         signal(SIGHUP,  cleanup);
1072         signal(SIGINT,  cleanup);
1073         signal(SIGPIPE, cleanup);
1074         signal(SIGALRM, cleanup);
1075         signal(SIGTERM, cleanup);
1076         signal(SIGXCPU, cleanup);
1077         signal(SIGXFSZ, cleanup);
1078         signal(SIGVTALRM,       cleanup);
1079         signal(SIGUSR1, cleanup);
1080         signal(SIGUSR2, cleanup);
1081
1082         initstate(seed, state, 256);
1083         setstate(state);
1084         fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1085         if (fd < 0) {
1086                 prterr(fname);
1087                 exit(91);
1088         }
1089         strncat(goodfile, fname, 256);
1090         strcat (goodfile, ".fsxgood");
1091         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1092         if (fsxgoodfd < 0) {
1093                 prterr(goodfile);
1094                 exit(92);
1095         }
1096         strncat(logfile, fname, 256);
1097         strcat (logfile, ".fsxlog");
1098         fsxlogf = fopen(logfile, "w");
1099         if (fsxlogf == NULL) {
1100                 prterr(logfile);
1101                 exit(93);
1102         }
1103         if (lite) {
1104                 off_t ret;
1105                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1106                 if (file_size == (off_t)-1) {
1107                         prterr(fname);
1108                         warn("main: lseek eof");
1109                         exit(94);
1110                 }
1111                 ret = lseek(fd, (off_t)0, SEEK_SET);
1112                 if (ret == (off_t)-1) {
1113                         prterr(fname);
1114                         warn("main: lseek 0");
1115                         exit(95);
1116                 }
1117         }
1118         original_buf = (char *) malloc(maxfilelen);
1119         for (i = 0; i < maxfilelen; i++)
1120                 original_buf[i] = random() % 256;
1121         good_buf = (char *) malloc(maxfilelen);
1122         memset(good_buf, '\0', maxfilelen);
1123         temp_buf = (char *) malloc(maxoplen);
1124         memset(temp_buf, '\0', maxoplen);
1125         if (lite) {     /* zero entire existing file */
1126                 ssize_t written;
1127
1128                 written = write(fd, good_buf, (size_t)maxfilelen);
1129                 if (written != maxfilelen) {
1130                         if (written == -1) {
1131                                 prterr(fname);
1132                                 warn("main: error on write");
1133                         } else
1134                                 warn("main: short write, 0x%x bytes instead of 0x%x\n",
1135                                      (unsigned)written, maxfilelen);
1136                         exit(98);
1137                 }
1138         } else
1139                 check_trunc_hack();
1140
1141         while (numops == -1 || numops--)
1142                 test();
1143
1144         if (close(fd)) {
1145                 prterr("close");
1146                 report_failure(99);
1147         }
1148         prt("All operations completed A-OK!\n");
1149
1150         exit(0);
1151         return 0;
1152 }
1153