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 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/tools/regression/fsx/fsx.c,v 1.1 2003/10/11 13:37:14 drhodus 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
  64 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  65
  66 /*
  67  *      A log entry is an operation and a bunch of arguments.
  68  */
  69
  70 struct log_entry {
  71         int     operation;
  72         int     args[3];
  73 };
  74
  75 #define LOGSIZE 1000
  76
  77 struct log_entry        oplog[LOGSIZE]; /* the log */
  78 int                     logptr = 0;     /* current position in log */
  79 int                     logcount = 0;   /* total ops */
  80
  81 /*
  82  *      Define operations
  83  */
  84
  85 #define OP_READ         1
  86 #define OP_WRITE        2
  87 #define OP_TRUNCATE     3
  88 #define OP_CLOSEOPEN    4
  89 #define OP_MAPREAD      5
  90 #define OP_MAPWRITE     6
  91 #define OP_SKIPPED      7
  92
  93 int page_size;
  94 int page_mask;
  95
  96 char    *original_buf;                  /* a pointer to the original data */
  97 char    *good_buf;                      /* a pointer to the correct data */
  98 char    *temp_buf;                      /* a pointer to the current data */
  99 char    *fname;                         /* name of our test file */
 100 int     fd;                             /* fd for our test file */
 101
 102 off_t           file_size = 0;
 103 off_t           biggest = 0;
 104 char            state[256];
 105 unsigned long   testcalls = 0;          /* calls to function "test" */
 106
 107 unsigned long   simulatedopcount = 0;   /* -b flag */
 108 int     closeprob = 0;                  /* -c flag */
 109 int     debug = 0;                      /* -d flag */
 110 unsigned long   debugstart = 0;         /* -D flag */
 111 unsigned long   maxfilelen = 256 * 1024;        /* -l flag */
 112 int     sizechecks = 1;                 /* -n flag disables them */
 113 int     maxoplen = 64 * 1024;           /* -o flag */
 114 int     quiet = 0;                      /* -q flag */
 115 unsigned long progressinterval = 0;     /* -p flag */
 116 int     readbdy = 1;                    /* -r flag */
 117 int     style = 0;                      /* -s flag */
 118 int     truncbdy = 1;                   /* -t flag */
 119 int     writebdy = 1;                   /* -w flag */
 120 long    monitorstart = -1;              /* -m flag */
 121 long    monitorend = -1;                /* -m flag */
 122 int     lite = 0;                       /* -L flag */
 123 long    numops = -1;                    /* -N flag */
 124 int     randomoplen = 1;                /* -O flag disables it */
 125 int     seed = 1;                       /* -S flag */
 126 int     mapped_writes = 1;            /* -W flag disables */
 127 int     mapped_reads = 1;               /* -R flag disables it */
 128 int     fsxgoodfd = 0;
 129 FILE *  fsxlogf = NULL;
 130 int badoff = -1;
 131 int closeopen = 0;
 132
 133
 134 void
 135 vwarnc(code, fmt, ap)
 136         int code;
 137         const char *fmt;
 138         va_list ap;
 139 {
 140         fprintf(stderr, "fsx: ");
 141         if (fmt != NULL) {
 142                 vfprintf(stderr, fmt, ap);
 143                 fprintf(stderr, ": ");
 144         }
 145         fprintf(stderr, "%s\n", strerror(code));
 146 }
 147
 148
 149 void
 150 warn(const char * fmt, ...)
 151 {
 152         va_list ap;
 153         va_start(ap, fmt);
 154         vwarnc(errno, fmt, ap);
 155         va_end(ap);
 156 }
 157
 158
 159 void
 160 prt(char *fmt, ...)
 161 {
 162         va_list args;
 163
 164         va_start(args, fmt);
 165         vfprintf(stdout, fmt, args);
 166         if (fsxlogf)
 167                 vfprintf(fsxlogf, fmt, args);
 168         va_end(args);
 169 }
 170
 171 void
 172 prterr(char *prefix)
 173 {
 174         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 175 }
 176
 177
 178 void
 179 log4(int operation, int arg0, int arg1, int arg2)
 180 {
 181         struct log_entry *le;
 182
 183         le = &oplog[logptr];
 184         le->operation = operation;
 185         if (closeopen)
 186                 le->operation = ~ le->operation;
 187         le->args[0] = arg0;
 188         le->args[1] = arg1;
 189         le->args[2] = arg2;
 190         logptr++;
 191         logcount++;
 192         if (logptr >= LOGSIZE)
 193                 logptr = 0;
 194 }
 195
 196
 197 void
 198 logdump(void)
 199 {
 200         int     i, count, down;
 201         struct log_entry        *lp;
 202
 203         prt("LOG DUMP (%d total operations):\n", logcount);
 204         if (logcount < LOGSIZE) {
 205                 i = 0;
 206                 count = logcount;
 207         } else {
 208                 i = logptr;
 209                 count = LOGSIZE;
 210         }
 211         for ( ; count > 0; count--) {
 212                 int opnum;
 213
 214                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 215                 prt("%d(%d mod 256): ", opnum, opnum%256);
 216                 lp = &oplog[i];
 217                 if ((closeopen = lp->operation < 0))
 218                         lp->operation = ~ lp->operation;
 219
 220                 switch (lp->operation) {
 221                 case OP_MAPREAD:
 222                         prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
 223                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 224                             lp->args[1]);
 225                         if (badoff >= lp->args[0] && badoff <
 226                                                      lp->args[0] + lp->args[1])
 227                                 prt("\t***RRRR***");
 228                         break;
 229                 case OP_MAPWRITE:
 230                         prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
 231                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 232                             lp->args[1]);
 233                         if (badoff >= lp->args[0] && badoff <
 234                                                      lp->args[0] + lp->args[1])
 235                                 prt("\t******WWWW");
 236                         break;
 237                 case OP_READ:
 238                         prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
 239                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 240                             lp->args[1]);
 241                         if (badoff >= lp->args[0] &&
 242                             badoff < lp->args[0] + lp->args[1])
 243                                 prt("\t***RRRR***");
 244                         break;
 245                 case OP_WRITE:
 246                         prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
 247                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 248                             lp->args[1]);
 249                         if (lp->args[0] > lp->args[2])
 250                                 prt(" HOLE");
 251                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 252                                 prt(" EXTEND");
 253                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
 254                             badoff < lp->args[0] + lp->args[1])
 255                                 prt("\t***WWWW");
 256                         break;
 257                 case OP_TRUNCATE:
 258                         down = lp->args[0] < lp->args[1];
 259                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 260                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
 261                         if (badoff >= lp->args[!down] &&
 262                             badoff < lp->args[!!down])
 263                                 prt("\t******WWWW");
 264                         break;
 265                 case OP_SKIPPED:
 266                         prt("SKIPPED (no operation)");
 267                         break;
 268                 default:
 269                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 270                             lp->operation);
 271                 }
 272                 if (closeopen)
 273                         prt("\n\t\tCLOSE/OPEN");
 274                 prt("\n");
 275                 i++;
 276                 if (i == LOGSIZE)
 277                         i = 0;
 278         }
 279 }
 280
 281
 282 void
 283 save_buffer(char *buffer, off_t bufferlength, int fd)
 284 {
 285         off_t ret;
 286         ssize_t byteswritten;
 287
 288         if (fd <= 0 || bufferlength == 0)
 289                 return;
 290
 291         if (bufferlength > SSIZE_MAX) {
 292                 prt("fsx flaw: overflow in save_buffer\n");
 293                 exit(67);
 294         }
 295         if (lite) {
 296                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 297                 if (size_by_seek == (off_t)-1)
 298                         prterr("save_buffer: lseek eof");
 299                 else if (bufferlength > size_by_seek) {
 300                         warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
 301                              (unsigned long long)bufferlength);
 302                         bufferlength = size_by_seek;
 303                 }
 304         }
 305
 306         ret = lseek(fd, (off_t)0, SEEK_SET);
 307         if (ret == (off_t)-1)
 308                 prterr("save_buffer: lseek 0");
 309
 310         byteswritten = write(fd, buffer, (size_t)bufferlength);
 311         if (byteswritten != bufferlength) {
 312                 if (byteswritten == -1)
 313                         prterr("save_buffer write");
 314                 else
 315                         warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",
 316                              (unsigned)byteswritten,
 317                              (unsigned long long)bufferlength);
 318         }
 319 }
 320
 321
 322 void
 323 report_failure(int status)
 324 {
 325         logdump();
 326
 327         if (fsxgoodfd) {
 328                 if (good_buf) {
 329                         save_buffer(good_buf, file_size, fsxgoodfd);
 330                         prt("Correct content saved for comparison\n");
 331                         prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
 332                             fname, fname);
 333                 }
 334                 close(fsxgoodfd);
 335         }
 336         exit(status);
 337 }
 338
 339
 340 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 341                                         *(((unsigned char *)(cp)) + 1)))
 342
 343 void
 344 check_buffers(unsigned offset, unsigned size)
 345 {
 346         unsigned char c, t;
 347         unsigned i = 0;
 348         unsigned n = 0;
 349         unsigned op = 0;
 350         unsigned bad = 0;
 351
 352         if (memcmp(good_buf + offset, temp_buf, size) != 0) {
 353                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
 354                     offset, size);
 355                 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
 356                 while (size > 0) {
 357                         c = good_buf[offset];
 358                         t = temp_buf[i];
 359                         if (c != t) {
 360                                 if (n == 0) {
 361                                         bad = short_at(&temp_buf[i]);
 362                                         prt("0x%5x\t0x%04x\t0x%04x", offset,
 363                                             short_at(&good_buf[offset]), bad);
 364                                         op = temp_buf[offset & 1 ? i+1 : i];
 365                                 }
 366                                 n++;
 367                                 badoff = offset;
 368                         }
 369                         offset++;
 370                         i++;
 371                         size--;
 372                 }
 373                 if (n) {
 374                         prt("\t0x%5x\n", n);
 375                         if (bad)
 376                                 prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));
 377                         else
 378                                 prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
 379                 } else
 380                         prt("????????????????\n");
 381                 report_failure(110);
 382         }
 383 }
 384
 385
 386 void
 387 check_size(void)
 388 {
 389         struct stat     statbuf;
 390         off_t   size_by_seek;
 391
 392         if (fstat(fd, &statbuf)) {
 393                 prterr("check_size: fstat");
 394                 statbuf.st_size = -1;
 395         }
 396         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 397         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 398                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 399                     (unsigned long long)file_size,
 400                     (unsigned long long)statbuf.st_size,
 401                     (unsigned long long)size_by_seek);
 402                 report_failure(120);
 403         }
 404 }
 405
 406
 407 void
 408 check_trunc_hack(void)
 409 {
 410         struct stat statbuf;
 411
 412         ftruncate(fd, (off_t)0);
 413         ftruncate(fd, (off_t)100000);
 414         fstat(fd, &statbuf);
 415         if (statbuf.st_size != (off_t)100000) {
 416                 prt("no extend on truncate! not posix!\n");
 417                 exit(130);
 418         }
 419         ftruncate(fd, (off_t)0);
 420 }
 421
 422
 423 void
 424 doread(unsigned offset, unsigned size)
 425 {
 426         off_t ret;
 427         unsigned iret;
 428
 429         offset -= offset % readbdy;
 430         if (size == 0) {
 431                 if (!quiet && testcalls > simulatedopcount)
 432                         prt("skipping zero size read\n");
 433                 log4(OP_SKIPPED, OP_READ, offset, size);
 434                 return;
 435         }
 436         if (size + offset > file_size) {
 437                 if (!quiet && testcalls > simulatedopcount)
 438                         prt("skipping seek/read past end of file\n");
 439                 log4(OP_SKIPPED, OP_READ, offset, size);
 440                 return;
 441         }
 442
 443         log4(OP_READ, offset, size, 0);
 444
 445         if (testcalls <= simulatedopcount)
 446                 return;
 447
 448         if (!quiet && ((progressinterval &&
 449                         testcalls % progressinterval == 0) ||
 450                        (debug &&
 451                         (monitorstart == -1 ||
 452                          (offset + size > monitorstart &&
 453                           (monitorend == -1 || offset <= monitorend))))))
 454                 prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 455                     offset, offset + size - 1, size);
 456         ret = lseek(fd, (off_t)offset, SEEK_SET);
 457         if (ret == (off_t)-1) {
 458                 prterr("doread: lseek");
 459                 report_failure(140);
 460         }
 461         iret = read(fd, temp_buf, size);
 462         if (iret != size) {
 463                 if (iret == -1)
 464                         prterr("doread: read");
 465                 else
 466                         prt("short read: 0x%x bytes instead of 0x%x\n",
 467                             iret, size);
 468                 report_failure(141);
 469         }
 470         check_buffers(offset, size);
 471 }
 472
 473
 474 void
 475 check_eofpage(char *s, unsigned offset, char *p, int size)
 476 {
 477         unsigned last_page, should_be_zero;
 478
 479         if (offset + size <= (file_size & ~page_mask))
 480                 return;
 481         /*
 482          * we landed in the last page of the file
 483          * test to make sure the VM system provided 0's
 484          * beyond the true end of the file mapping
 485          * (as required by mmap def in 1996 posix 1003.1)
 486          */
 487         last_page = ((int)p + (offset & page_mask) + size) & ~page_mask;
 488
 489         for (should_be_zero = last_page + (file_size & page_mask);
 490              should_be_zero < last_page + page_size;
 491              should_be_zero++)
 492                 if (*(char *)should_be_zero) {
 493                         prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
 494                             s, file_size - 1, should_be_zero & page_mask,
 495                             short_at(should_be_zero));
 496                         report_failure(205);
 497                 }
 498 }
 499
 500
 501 void
 502 domapread(unsigned offset, unsigned size)
 503 {
 504         unsigned pg_offset;
 505         unsigned map_size;
 506         char    *p;
 507
 508         offset -= offset % readbdy;
 509         if (size == 0) {
 510                 if (!quiet && testcalls > simulatedopcount)
 511                         prt("skipping zero size read\n");
 512                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 513                 return;
 514         }
 515         if (size + offset > file_size) {
 516                 if (!quiet && testcalls > simulatedopcount)
 517                         prt("skipping seek/read past end of file\n");
 518                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 519                 return;
 520         }
 521
 522         log4(OP_MAPREAD, offset, size, 0);
 523
 524         if (testcalls <= simulatedopcount)
 525                 return;
 526
 527         if (!quiet && ((progressinterval &&
 528                         testcalls % progressinterval == 0) ||
 529                        (debug &&
 530                         (monitorstart == -1 ||
 531                          (offset + size > monitorstart &&
 532                           (monitorend == -1 || offset <= monitorend))))))
 533                 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 534                     offset, offset + size - 1, size);
 535
 536         pg_offset = offset & page_mask;
 537         map_size  = pg_offset + size;
 538
 539         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
 540                               (off_t)(offset - pg_offset))) == (char *)-1) {
 541                 prterr("domapread: mmap");
 542                 report_failure(190);
 543         }
 544         memcpy(temp_buf, p + pg_offset, size);
 545
 546         check_eofpage("Read", offset, p, size);
 547
 548         if (munmap(p, map_size) != 0) {
 549                 prterr("domapread: munmap");
 550                 report_failure(191);
 551         }
 552
 553         check_buffers(offset, size);
 554 }
 555
 556
 557 void
 558 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 559 {
 560         while (size--) {
 561                 good_buf[offset] = testcalls % 256;
 562                 if (offset % 2)
 563                         good_buf[offset] += original_buf[offset];
 564                 offset++;
 565         }
 566 }
 567
 568
 569 void
 570 dowrite(unsigned offset, unsigned size)
 571 {
 572         off_t ret;
 573         unsigned iret;
 574
 575         offset -= offset % writebdy;
 576         if (size == 0) {
 577                 if (!quiet && testcalls > simulatedopcount)
 578                         prt("skipping zero size write\n");
 579                 log4(OP_SKIPPED, OP_WRITE, offset, size);
 580                 return;
 581         }
 582
 583         log4(OP_WRITE, offset, size, file_size);
 584
 585         gendata(original_buf, good_buf, offset, size);
 586         if (file_size < offset + size) {
 587                 if (file_size < offset)
 588                         memset(good_buf + file_size, '\0', offset - file_size);
 589                 file_size = offset + size;
 590                 if (lite) {
 591                         warn("Lite file size bug in fsx!");
 592                         report_failure(149);
 593                 }
 594         }
 595
 596         if (testcalls <= simulatedopcount)
 597                 return;
 598
 599         if (!quiet && ((progressinterval &&
 600                         testcalls % progressinterval == 0) ||
 601                        (debug &&
 602                         (monitorstart == -1 ||
 603                          (offset + size > monitorstart &&
 604                           (monitorend == -1 || offset <= monitorend))))))
 605                 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 606                     offset, offset + size - 1, size);
 607         ret = lseek(fd, (off_t)offset, SEEK_SET);
 608         if (ret == (off_t)-1) {
 609                 prterr("dowrite: lseek");
 610                 report_failure(150);
 611         }
 612         iret = write(fd, good_buf + offset, size);
 613         if (iret != size) {
 614                 if (iret == -1)
 615                         prterr("dowrite: write");
 616                 else
 617                         prt("short write: 0x%x bytes instead of 0x%x\n",
 618                             iret, size);
 619                 report_failure(151);
 620         }
 621 }
 622
 623
 624 void
 625 domapwrite(unsigned offset, unsigned size)
 626 {
 627         unsigned pg_offset;
 628         unsigned map_size;
 629         off_t    cur_filesize;
 630         char    *p;
 631
 632         offset -= offset % writebdy;
 633         if (size == 0) {
 634                 if (!quiet && testcalls > simulatedopcount)
 635                         prt("skipping zero size write\n");
 636                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
 637                 return;
 638         }
 639         cur_filesize = file_size;
 640
 641         log4(OP_MAPWRITE, offset, size, 0);
 642
 643         gendata(original_buf, good_buf, offset, size);
 644         if (file_size < offset + size) {
 645                 if (file_size < offset)
 646                         memset(good_buf + file_size, '\0', offset - file_size);
 647                 file_size = offset + size;
 648                 if (lite) {
 649                         warn("Lite file size bug in fsx!");
 650                         report_failure(200);
 651                 }
 652         }
 653
 654         if (testcalls <= simulatedopcount)
 655                 return;
 656
 657         if (!quiet && ((progressinterval &&
 658                         testcalls % progressinterval == 0) ||
 659                        (debug &&
 660                         (monitorstart == -1 ||
 661                          (offset + size > monitorstart &&
 662                           (monitorend == -1 || offset <= monitorend))))))
 663                 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 664                     offset, offset + size - 1, size);
 665
 666         if (file_size > cur_filesize) {
 667                 if (ftruncate(fd, file_size) == -1) {
 668                         prterr("domapwrite: ftruncate");
 669                         exit(201);
 670                 }
 671         }
 672         pg_offset = offset & page_mask;
 673         map_size  = pg_offset + size;
 674
 675         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 676                               MAP_FILE | MAP_SHARED, fd,
 677                               (off_t)(offset - pg_offset))) == (char *)-1) {
 678                 prterr("domapwrite: mmap");
 679                 report_failure(202);
 680         }
 681         memcpy(p + pg_offset, good_buf + offset, size);
 682         if (msync(p, map_size, 0) != 0) {
 683                 prterr("domapwrite: msync");
 684                 report_failure(203);
 685         }
 686
 687         check_eofpage("Write", offset, p, size);
 688
 689         if (munmap(p, map_size) != 0) {
 690                 prterr("domapwrite: munmap");
 691                 report_failure(204);
 692         }
 693 }
 694
 695
 696 void
 697 dotruncate(unsigned size)
 698 {
 699         int oldsize = file_size;
 700
 701         size -= size % truncbdy;
 702         if (size > biggest) {
 703                 biggest = size;
 704                 if (!quiet && testcalls > simulatedopcount)
 705                         prt("truncating to largest ever: 0x%x\n", size);
 706         }
 707
 708         log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
 709
 710         if (size > file_size)
 711                 memset(good_buf + file_size, '\0', size - file_size);
 712         file_size = size;
 713
 714         if (testcalls <= simulatedopcount)
 715                 return;
 716
 717         if ((progressinterval && testcalls % progressinterval == 0) ||
 718             (debug && (monitorstart == -1 || monitorend == -1 ||
 719                        size <= monitorend)))
 720                 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
 721         if (ftruncate(fd, (off_t)size) == -1) {
 722                 prt("ftruncate1: %x\n", size);
 723                 prterr("dotruncate: ftruncate");
 724                 report_failure(160);
 725         }
 726 }
 727
 728
 729 void
 730 writefileimage()
 731 {
 732         ssize_t iret;
 733
 734         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 735                 prterr("writefileimage: lseek");
 736                 report_failure(171);
 737         }
 738         iret = write(fd, good_buf, file_size);
 739         if ((off_t)iret != file_size) {
 740                 if (iret == -1)
 741                         prterr("writefileimage: write");
 742                 else
 743                         prt("short write: 0x%x bytes instead of 0x%llx\n",
 744                             iret, (unsigned long long)file_size);
 745                 report_failure(172);
 746         }
 747         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 748                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
 749                 prterr("writefileimage: ftruncate");
 750                 report_failure(173);
 751         }
 752 }
 753
 754
 755 void
 756 docloseopen(void)
 757 {
 758         if (testcalls <= simulatedopcount)
 759                 return;
 760
 761         if (debug)
 762                 prt("%lu close/open\n", testcalls);
 763         if (close(fd)) {
 764                 prterr("docloseopen: close");
 765                 report_failure(180);
 766         }
 767         fd = open(fname, O_RDWR, 0);
 768         if (fd < 0) {
 769                 prterr("docloseopen: open");
 770                 report_failure(181);
 771         }
 772 }
 773
 774
 775 void
 776 test(void)
 777 {
 778         unsigned long   offset;
 779         unsigned long   size = maxoplen;
 780         unsigned long   rv = random();
 781         unsigned long   op = rv % (3 + !lite + mapped_writes);
 782
 783         /* turn off the map read if necessary */
 784
 785         if (op == 2 && !mapped_reads)
 786             op = 0;
 787
 788         if (simulatedopcount > 0 && testcalls == simulatedopcount)
 789                 writefileimage();
 790
 791         testcalls++;
 792
 793         if (closeprob)
 794                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
 795
 796         if (debugstart > 0 && testcalls >= debugstart)
 797                 debug = 1;
 798
 799         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
 800                 prt("%lu...\n", testcalls);
 801
 802         /*
 803          * READ:        op = 0
 804          * WRITE:       op = 1
 805          * MAPREAD:     op = 2
 806          * TRUNCATE:    op = 3
 807          * MAPWRITE:    op = 3 or 4
 808          */
 809         if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
 810                 dotruncate(random() % maxfilelen);
 811         else {
 812                 if (randomoplen)
 813                         size = random() % (maxoplen+1);
 814                 if (lite ? 0 : op == 3)
 815                         dotruncate(size);
 816                 else {
 817                         offset = random();
 818                         if (op == 1 || op == (lite ? 3 : 4)) {
 819                                 offset %= maxfilelen;
 820                                 if (offset + size > maxfilelen)
 821                                         size = maxfilelen - offset;
 822                                 if (op != 1)
 823                                         domapwrite(offset, size);
 824                                 else
 825                                         dowrite(offset, size);
 826                         } else {
 827                                 if (file_size)
 828                                         offset %= file_size;
 829                                 else
 830                                         offset = 0;
 831                                 if (offset + size > file_size)
 832                                         size = file_size - offset;
 833                                 if (op != 0)
 834                                         domapread(offset, size);
 835                                 else
 836                                         doread(offset, size);
 837                         }
 838                 }
 839         }
 840         if (sizechecks && testcalls > simulatedopcount)
 841                 check_size();
 842         if (closeopen)
 843                 docloseopen();
 844 }
 845
 846
 847 void
 848 cleanup(sig)
 849         int     sig;
 850 {
 851         if (sig)
 852                 prt("signal %d\n", sig);
 853         prt("testcalls = %lu\n", testcalls);
 854         exit(sig);
 855 }
 856
 857
 858 void
 859 usage(void)
 860 {
 861         fprintf(stdout, "usage: %s",
 862                 "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\
 863         -b opnum: beginning operation number (default 1)\n\
 864         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
 865         -d: debug output for all operations\n\
 866         -l flen: the upper bound on file size (default 262144)\n\
 867         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
 868         -n: no verifications of file size\n\
 869         -o oplen: the upper bound on operation size (default 65536)\n\
 870         -p progressinterval: debug output at specified operation interval\n\
 871         -q: quieter operation\n\
 872         -r readbdy: 4096 would make reads page aligned (default 1)\n\
 873         -s style: 1 gives smaller truncates (default 0)\n\
 874         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
 875         -w writebdy: 4096 would make writes page aligned (default 1)\n\
 876         -D startingop: debug output starting at specified operation\n\
 877         -L: fsxLite - no file creations & no file size changes\n\
 878         -N numops: total # operations to do (default infinity)\n\
 879         -O: use oplen (see -o flag) for every op (default random)\n\
 880         -P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
 881         -S seed: for random # generator (default 1) 0 gets timestamp\n\
 882         -W: mapped write operations DISabled\n\
 883         -R: mapped read operations DISabled)\n\
 884         fname: this filename is REQUIRED (no default)\n");
 885         exit(90);
 886 }
 887
 888
 889 int
 890 getnum(char *s, char **e)
 891 {
 892         int ret = -1;
 893
 894         *e = (char *) 0;
 895         ret = strtol(s, e, 0);
 896         if (*e)
 897                 switch (**e) {
 898                 case 'b':
 899                 case 'B':
 900                         ret *= 512;
 901                         *e = *e + 1;
 902                         break;
 903                 case 'k':
 904                 case 'K':
 905                         ret *= 1024;
 906                         *e = *e + 1;
 907                         break;
 908                 case 'm':
 909                 case 'M':
 910                         ret *= 1024*1024;
 911                         *e = *e + 1;
 912                         break;
 913                 case 'w':
 914                 case 'W':
 915                         ret *= 4;
 916                         *e = *e + 1;
 917                         break;
 918                 }
 919         return (ret);
 920 }
 921
 922
 923 int
 924 main(int argc, char **argv)
 925 {
 926         int     i, ch;
 927         char    *endp;
 928         char goodfile[1024];
 929         char logfile[1024];
 930
 931         goodfile[0] = 0;
 932         logfile[0] = 0;
 933
 934         page_size = getpagesize();
 935         page_mask = page_size - 1;
 936
 937         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
 938
 939         while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))
 940                != EOF)
 941                 switch (ch) {
 942                 case 'b':
 943                         simulatedopcount = getnum(optarg, &endp);
 944                         if (!quiet)
 945                                 fprintf(stdout, "Will begin at operation %ld\n",
 946                                         simulatedopcount);
 947                         if (simulatedopcount == 0)
 948                                 usage();
 949                         simulatedopcount -= 1;
 950                         break;
 951                 case 'c':
 952                         closeprob = getnum(optarg, &endp);
 953                         if (!quiet)
 954                                 fprintf(stdout,
 955                                         "Chance of close/open is 1 in %d\n",
 956                                         closeprob);
 957                         if (closeprob <= 0)
 958                                 usage();
 959                         break;
 960                 case 'd':
 961                         debug = 1;
 962                         break;
 963                 case 'l':
 964                         maxfilelen = getnum(optarg, &endp);
 965                         if (maxfilelen <= 0)
 966                                 usage();
 967                         break;
 968                 case 'm':
 969                         monitorstart = getnum(optarg, &endp);
 970                         if (monitorstart < 0)
 971                                 usage();
 972                         if (!endp || *endp++ != ':')
 973                                 usage();
 974                         monitorend = getnum(endp, &endp);
 975                         if (monitorend < 0)
 976                                 usage();
 977                         if (monitorend == 0)
 978                                 monitorend = -1; /* aka infinity */
 979                         debug = 1;
 980                 case 'n':
 981                         sizechecks = 0;
 982                         break;
 983                 case 'o':
 984                         maxoplen = getnum(optarg, &endp);
 985                         if (maxoplen <= 0)
 986                                 usage();
 987                         break;
 988                 case 'p':
 989                         progressinterval = getnum(optarg, &endp);
 990                         if (progressinterval < 0)
 991                                 usage();
 992                         break;
 993                 case 'q':
 994                         quiet = 1;
 995                         break;
 996                 case 'r':
 997                         readbdy = getnum(optarg, &endp);
 998                         if (readbdy <= 0)
 999                                 usage();
1000                         break;
1001                 case 's':
1002                         style = getnum(optarg, &endp);
1003                         if (style < 0 || style > 1)
1004                                 usage();
1005                         break;
1006                 case 't':
1007                         truncbdy = getnum(optarg, &endp);
1008                         if (truncbdy <= 0)
1009                                 usage();
1010                         break;
1011                 case 'w':
1012                         writebdy = getnum(optarg, &endp);
1013                         if (writebdy <= 0)
1014                                 usage();
1015                         break;
1016                 case 'D':
1017                         debugstart = getnum(optarg, &endp);
1018                         if (debugstart < 1)
1019                                 usage();
1020                         break;
1021                 case 'L':
1022                         lite = 1;
1023                         break;
1024                 case 'N':
1025                         numops = getnum(optarg, &endp);
1026                         if (numops < 0)
1027                                 usage();
1028                         break;
1029                 case 'O':
1030                         randomoplen = 0;
1031                         break;
1032                 case 'P':
1033                         strncpy(goodfile, optarg, sizeof(goodfile));
1034                         strcat(goodfile, "/");
1035                         strncpy(logfile, optarg, sizeof(logfile));
1036                         strcat(logfile, "/");
1037                         break;
1038                 case 'R':
1039                         mapped_reads = 0;
1040                         break;
1041                 case 'S':
1042                         seed = getnum(optarg, &endp);
1043                         if (seed == 0)
1044                                 seed = time(0) % 10000;
1045                         if (!quiet)
1046                                 fprintf(stdout, "Seed set to %d\n", seed);
1047                         if (seed < 0)
1048                                 usage();
1049                         break;
1050                 case 'W':
1051                         mapped_writes = 0;
1052                         if (!quiet)
1053                                 fprintf(stdout, "mapped writes DISABLED\n");
1054                         break;
1055
1056                 default:
1057                         usage();
1058                         /* NOTREACHED */
1059                 }
1060         argc -= optind;
1061         argv += optind;
1062         if (argc != 1)
1063                 usage();
1064         fname = argv[0];
1065
1066         signal(SIGHUP,  cleanup);
1067         signal(SIGINT,  cleanup);
1068         signal(SIGPIPE, cleanup);
1069         signal(SIGALRM, cleanup);
1070         signal(SIGTERM, cleanup);
1071         signal(SIGXCPU, cleanup);
1072         signal(SIGXFSZ, cleanup);
1073         signal(SIGVTALRM,       cleanup);
1074         signal(SIGUSR1, cleanup);
1075         signal(SIGUSR2, cleanup);
1076
1077         initstate(seed, state, 256);
1078         setstate(state);
1079         fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1080         if (fd < 0) {
1081                 prterr(fname);
1082                 exit(91);
1083         }
1084         strncat(goodfile, fname, 256);
1085         strcat (goodfile, ".fsxgood");
1086         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1087         if (fsxgoodfd < 0) {
1088                 prterr(goodfile);
1089                 exit(92);
1090         }
1091         strncat(logfile, fname, 256);
1092         strcat (logfile, ".fsxlog");
1093         fsxlogf = fopen(logfile, "w");
1094         if (fsxlogf == NULL) {
1095                 prterr(logfile);
1096                 exit(93);
1097         }
1098         if (lite) {
1099                 off_t ret;
1100                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1101                 if (file_size == (off_t)-1) {
1102                         prterr(fname);
1103                         warn("main: lseek eof");
1104                         exit(94);
1105                 }
1106                 ret = lseek(fd, (off_t)0, SEEK_SET);
1107                 if (ret == (off_t)-1) {
1108                         prterr(fname);
1109                         warn("main: lseek 0");
1110                         exit(95);
1111                 }
1112         }
1113         original_buf = (char *) malloc(maxfilelen);
1114         for (i = 0; i < maxfilelen; i++)
1115                 original_buf[i] = random() % 256;
1116         good_buf = (char *) malloc(maxfilelen);
1117         memset(good_buf, '\0', maxfilelen);
1118         temp_buf = (char *) malloc(maxoplen);
1119         memset(temp_buf, '\0', maxoplen);
1120         if (lite) {     /* zero entire existing file */
1121                 ssize_t written;
1122
1123                 written = write(fd, good_buf, (size_t)maxfilelen);
1124                 if (written != maxfilelen) {
1125                         if (written == -1) {
1126                                 prterr(fname);
1127                                 warn("main: error on write");
1128                         } else
1129                                 warn("main: short write, 0x%x bytes instead of 0x%x\n",
1130                                      (unsigned)written, maxfilelen);
1131                         exit(98);
1132                 }
1133         } else
1134                 check_trunc_hack();
1135
1136         while (numops == -1 || numops--)
1137                 test();
1138
1139         if (close(fd)) {
1140                 prterr("close");
1141                 report_failure(99);
1142         }
1143         prt("All operations completed A-OK!\n");
1144
1145         exit(0);
1146         return 0;
1147 }
1148