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     mapped_msync = 1;             /* -U flag disables */
 130 int     fsxgoodfd = 0;
 131 FILE *  fsxlogf = NULL;
 132 int badoff = -1;
 133 int closeopen = 0;
 134
 135
 136 void
 137 vwarnc(code, fmt, ap)
 138         int code;
 139         const char *fmt;
 140         va_list ap;
 141 {
 142         fprintf(stderr, "fsx: ");
 143         if (fmt != NULL) {
 144                 vfprintf(stderr, fmt, ap);
 145                 fprintf(stderr, ": ");
 146         }
 147         fprintf(stderr, "%s\n", strerror(code));
 148 }
 149
 150
 151 void
 152 warn(const char * fmt, ...)
 153 {
 154         va_list ap;
 155         va_start(ap, fmt);
 156         vwarnc(errno, fmt, ap);
 157         va_end(ap);
 158 }
 159
 160
 161 void
 162 prt(char *fmt, ...)
 163 {
 164         va_list args;
 165
 166         va_start(args, fmt);
 167         vfprintf(stdout, fmt, args);
 168         va_end(args);
 169
 170         if (fsxlogf) {
 171                 va_start(args, fmt);
 172                 vfprintf(fsxlogf, fmt, args);
 173                 va_end(args);
 174         }
 175 }
 176
 177 void
 178 prterr(char *prefix)
 179 {
 180         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 181 }
 182
 183
 184 void
 185 log4(int operation, int arg0, int arg1, int arg2)
 186 {
 187         struct log_entry *le;
 188
 189         le = &oplog[logptr];
 190         le->operation = operation;
 191         if (closeopen)
 192                 le->operation = ~ le->operation;
 193         le->args[0] = arg0;
 194         le->args[1] = arg1;
 195         le->args[2] = arg2;
 196         logptr++;
 197         logcount++;
 198         if (logptr >= LOGSIZE)
 199                 logptr = 0;
 200 }
 201
 202
 203 void
 204 logdump(void)
 205 {
 206         int     i, count, down;
 207         struct log_entry        *lp;
 208
 209         prt("LOG DUMP (%d total operations):\n", logcount);
 210         if (logcount < LOGSIZE) {
 211                 i = 0;
 212                 count = logcount;
 213         } else {
 214                 i = logptr;
 215                 count = LOGSIZE;
 216         }
 217         for ( ; count > 0; count--) {
 218                 int opnum;
 219
 220                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 221                 prt("%d(%d mod 256): ", opnum, opnum%256);
 222                 lp = &oplog[i];
 223                 if ((closeopen = lp->operation < 0))
 224                         lp->operation = ~ lp->operation;
 225
 226                 switch (lp->operation) {
 227                 case OP_MAPREAD:
 228                         prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
 229                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 230                             lp->args[1]);
 231                         if (badoff >= lp->args[0] && badoff <
 232                                                      lp->args[0] + lp->args[1])
 233                                 prt("\t***RRRR***");
 234                         break;
 235                 case OP_MAPWRITE:
 236                         prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
 237                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 238                             lp->args[1]);
 239                         if (badoff >= lp->args[0] && badoff <
 240                                                      lp->args[0] + lp->args[1])
 241                                 prt("\t******WWWW");
 242                         break;
 243                 case OP_READ:
 244                         prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
 245                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 246                             lp->args[1]);
 247                         if (badoff >= lp->args[0] &&
 248                             badoff < lp->args[0] + lp->args[1])
 249                                 prt("\t***RRRR***");
 250                         break;
 251                 case OP_WRITE:
 252                         prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
 253                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 254                             lp->args[1]);
 255                         if (lp->args[0] > lp->args[2])
 256                                 prt(" HOLE");
 257                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 258                                 prt(" EXTEND");
 259                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
 260                             badoff < lp->args[0] + lp->args[1])
 261                                 prt("\t***WWWW");
 262                         break;
 263                 case OP_TRUNCATE:
 264                         down = lp->args[0] < lp->args[1];
 265                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 266                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
 267                         if (badoff >= lp->args[!down] &&
 268                             badoff < lp->args[!!down])
 269                                 prt("\t******WWWW");
 270                         break;
 271                 case OP_SKIPPED:
 272                         prt("SKIPPED (no operation)");
 273                         break;
 274                 default:
 275                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 276                             lp->operation);
 277                 }
 278                 if (closeopen)
 279                         prt("\n\t\tCLOSE/OPEN");
 280                 prt("\n");
 281                 i++;
 282                 if (i == LOGSIZE)
 283                         i = 0;
 284         }
 285 }
 286
 287
 288 void
 289 save_buffer(char *buffer, off_t bufferlength, int fd)
 290 {
 291         off_t ret;
 292         ssize_t byteswritten;
 293
 294         if (fd <= 0 || bufferlength == 0)
 295                 return;
 296
 297         if (bufferlength > SSIZE_MAX) {
 298                 prt("fsx flaw: overflow in save_buffer\n");
 299                 exit(67);
 300         }
 301         if (lite) {
 302                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 303                 if (size_by_seek == (off_t)-1)
 304                         prterr("save_buffer: lseek eof");
 305                 else if (bufferlength > size_by_seek) {
 306                         warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
 307                              (unsigned long long)bufferlength);
 308                         bufferlength = size_by_seek;
 309                 }
 310         }
 311
 312         ret = lseek(fd, (off_t)0, SEEK_SET);
 313         if (ret == (off_t)-1)
 314                 prterr("save_buffer: lseek 0");
 315
 316         byteswritten = write(fd, buffer, (size_t)bufferlength);
 317         if (byteswritten != bufferlength) {
 318                 if (byteswritten == -1)
 319                         prterr("save_buffer write");
 320                 else
 321                         warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",
 322                              (unsigned)byteswritten,
 323                              (unsigned long long)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         uintptr_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 = ((uintptr_t)p + (offset & page_mask) + size) & ~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                             short_at(should_be_zero));
 502                         report_failure(205);
 503                 }
 504 }
 505
 506
 507 void
 508 domapread(unsigned offset, unsigned size)
 509 {
 510         unsigned pg_offset;
 511         unsigned map_size;
 512         char    *p;
 513
 514         offset -= offset % readbdy;
 515         if (size == 0) {
 516                 if (!quiet && testcalls > simulatedopcount)
 517                         prt("skipping zero size read\n");
 518                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 519                 return;
 520         }
 521         if (size + offset > file_size) {
 522                 if (!quiet && testcalls > simulatedopcount)
 523                         prt("skipping seek/read past end of file\n");
 524                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 525                 return;
 526         }
 527
 528         log4(OP_MAPREAD, offset, size, 0);
 529
 530         if (testcalls <= simulatedopcount)
 531                 return;
 532
 533         if (!quiet && ((progressinterval &&
 534                         testcalls % progressinterval == 0) ||
 535                        (debug &&
 536                         (monitorstart == -1 ||
 537                          (offset + size > monitorstart &&
 538                           (monitorend == -1 || offset <= monitorend))))))
 539                 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 540                     offset, offset + size - 1, size);
 541
 542         pg_offset = offset & page_mask;
 543         map_size  = pg_offset + size;
 544
 545         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
 546                               (off_t)(offset - pg_offset))) == (char *)-1) {
 547                 prterr("domapread: mmap");
 548                 report_failure(190);
 549         }
 550         memcpy(temp_buf, p + pg_offset, size);
 551
 552         check_eofpage("Read", offset, p, size);
 553
 554         if (munmap(p, map_size) != 0) {
 555                 prterr("domapread: munmap");
 556                 report_failure(191);
 557         }
 558
 559         check_buffers(offset, size);
 560 }
 561
 562
 563 void
 564 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 565 {
 566         while (size--) {
 567                 good_buf[offset] = testcalls % 256;
 568                 if (offset % 2)
 569                         good_buf[offset] += original_buf[offset];
 570                 offset++;
 571         }
 572 }
 573
 574
 575 void
 576 dowrite(unsigned offset, unsigned size)
 577 {
 578         off_t ret;
 579         unsigned iret;
 580
 581         offset -= offset % writebdy;
 582         if (size == 0) {
 583                 if (!quiet && testcalls > simulatedopcount)
 584                         prt("skipping zero size write\n");
 585                 log4(OP_SKIPPED, OP_WRITE, offset, size);
 586                 return;
 587         }
 588
 589         log4(OP_WRITE, offset, size, file_size);
 590
 591         gendata(original_buf, good_buf, offset, size);
 592         if (file_size < offset + size) {
 593                 if (file_size < offset)
 594                         memset(good_buf + file_size, '\0', offset - file_size);
 595                 file_size = offset + size;
 596                 if (lite) {
 597                         warn("Lite file size bug in fsx!");
 598                         report_failure(149);
 599                 }
 600         }
 601
 602         if (testcalls <= simulatedopcount)
 603                 return;
 604
 605         if (!quiet && ((progressinterval &&
 606                         testcalls % progressinterval == 0) ||
 607                        (debug &&
 608                         (monitorstart == -1 ||
 609                          (offset + size > monitorstart &&
 610                           (monitorend == -1 || offset <= monitorend))))))
 611                 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 612                     offset, offset + size - 1, size);
 613         ret = lseek(fd, (off_t)offset, SEEK_SET);
 614         if (ret == (off_t)-1) {
 615                 prterr("dowrite: lseek");
 616                 report_failure(150);
 617         }
 618         iret = write(fd, good_buf + offset, size);
 619         if (iret != size) {
 620                 if (iret == -1)
 621                         prterr("dowrite: write");
 622                 else
 623                         prt("short write: 0x%x bytes instead of 0x%x\n",
 624                             iret, size);
 625                 report_failure(151);
 626         }
 627 }
 628
 629
 630 void
 631 domapwrite(unsigned offset, unsigned size)
 632 {
 633         unsigned pg_offset;
 634         unsigned map_size;
 635         off_t    cur_filesize;
 636         char    *p;
 637
 638         offset -= offset % writebdy;
 639         if (size == 0) {
 640                 if (!quiet && testcalls > simulatedopcount)
 641                         prt("skipping zero size write\n");
 642                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
 643                 return;
 644         }
 645         cur_filesize = file_size;
 646
 647         log4(OP_MAPWRITE, offset, size, 0);
 648
 649         gendata(original_buf, good_buf, offset, size);
 650         if (file_size < offset + size) {
 651                 if (file_size < offset)
 652                         memset(good_buf + file_size, '\0', offset - file_size);
 653                 file_size = offset + size;
 654                 if (lite) {
 655                         warn("Lite file size bug in fsx!");
 656                         report_failure(200);
 657                 }
 658         }
 659
 660         if (testcalls <= simulatedopcount)
 661                 return;
 662
 663         if (!quiet && ((progressinterval &&
 664                         testcalls % progressinterval == 0) ||
 665                        (debug &&
 666                         (monitorstart == -1 ||
 667                          (offset + size > monitorstart &&
 668                           (monitorend == -1 || offset <= monitorend))))))
 669                 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 670                     offset, offset + size - 1, size);
 671
 672         if (file_size > cur_filesize) {
 673                 if (ftruncate(fd, file_size) == -1) {
 674                         prterr("domapwrite: ftruncate");
 675                         exit(201);
 676                 }
 677         }
 678         pg_offset = offset & page_mask;
 679         map_size  = pg_offset + size;
 680
 681         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 682                               MAP_FILE | MAP_SHARED, fd,
 683                               (off_t)(offset - pg_offset))) == MAP_FAILED) {
 684                 prterr("domapwrite: mmap");
 685                 report_failure(202);
 686         }
 687         memcpy(p + pg_offset, good_buf + offset, size);
 688         if (mapped_msync && msync(p, map_size, MS_SYNC) != 0) {
 689                 prterr("domapwrite: msync");
 690                 report_failure(203);
 691         }
 692
 693         check_eofpage("Write", offset, p, size);
 694
 695         if (munmap(p, map_size) != 0) {
 696                 prterr("domapwrite: munmap");
 697                 report_failure(204);
 698         }
 699 }
 700
 701
 702 void
 703 dotruncate(unsigned size)
 704 {
 705         int oldsize = file_size;
 706
 707         size -= size % truncbdy;
 708         if (size > biggest) {
 709                 biggest = size;
 710                 if (!quiet && testcalls > simulatedopcount)
 711                         prt("truncating to largest ever: 0x%x\n", size);
 712         }
 713
 714         log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
 715
 716         if (size > file_size)
 717                 memset(good_buf + file_size, '\0', size - file_size);
 718         file_size = size;
 719
 720         if (testcalls <= simulatedopcount)
 721                 return;
 722
 723         if ((progressinterval && testcalls % progressinterval == 0) ||
 724             (debug && (monitorstart == -1 || monitorend == -1 ||
 725                        size <= monitorend)))
 726                 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
 727         if (ftruncate(fd, (off_t)size) == -1) {
 728                 prt("ftruncate1: %x\n", size);
 729                 prterr("dotruncate: ftruncate");
 730                 report_failure(160);
 731         }
 732 }
 733
 734
 735 void
 736 writefileimage()
 737 {
 738         ssize_t iret;
 739
 740         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 741                 prterr("writefileimage: lseek");
 742                 report_failure(171);
 743         }
 744         iret = write(fd, good_buf, file_size);
 745         if ((off_t)iret != file_size) {
 746                 if (iret == -1)
 747                         prterr("writefileimage: write");
 748                 else
 749                         prt("short write: 0x%x bytes instead of 0x%llx\n",
 750                             iret, (unsigned long long)file_size);
 751                 report_failure(172);
 752         }
 753         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 754                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
 755                 prterr("writefileimage: ftruncate");
 756                 report_failure(173);
 757         }
 758 }
 759
 760
 761 void
 762 docloseopen(void)
 763 {
 764         if (testcalls <= simulatedopcount)
 765                 return;
 766
 767         if (debug)
 768                 prt("%lu close/open\n", testcalls);
 769         if (close(fd)) {
 770                 prterr("docloseopen: close");
 771                 report_failure(180);
 772         }
 773         fd = open(fname, O_RDWR, 0);
 774         if (fd < 0) {
 775                 prterr("docloseopen: open");
 776                 report_failure(181);
 777         }
 778 }
 779
 780
 781 void
 782 test(void)
 783 {
 784         unsigned long   offset;
 785         unsigned long   size = maxoplen;
 786         unsigned long   rv = random();
 787         unsigned long   op = rv % (3 + !lite + mapped_writes);
 788
 789         /* turn off the map read if necessary */
 790
 791         if (op == 2 && !mapped_reads)
 792             op = 0;
 793
 794         if (simulatedopcount > 0 && testcalls == simulatedopcount)
 795                 writefileimage();
 796
 797         testcalls++;
 798
 799         if (closeprob)
 800                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
 801
 802         if (debugstart > 0 && testcalls >= debugstart)
 803                 debug = 1;
 804
 805         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
 806                 prt("%lu...\n", testcalls);
 807
 808         /*
 809          * READ:        op = 0
 810          * WRITE:       op = 1
 811          * MAPREAD:     op = 2
 812          * TRUNCATE:    op = 3
 813          * MAPWRITE:    op = 3 or 4
 814          */
 815         if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
 816                 dotruncate(random() % maxfilelen);
 817         else {
 818                 if (randomoplen)
 819                         size = random() % (maxoplen+1);
 820                 if (lite ? 0 : op == 3)
 821                         dotruncate(size);
 822                 else {
 823                         offset = random();
 824                         if (op == 1 || op == (lite ? 3 : 4)) {
 825                                 offset %= maxfilelen;
 826                                 if (offset + size > maxfilelen)
 827                                         size = maxfilelen - offset;
 828                                 if (op != 1)
 829                                         domapwrite(offset, size);
 830                                 else
 831                                         dowrite(offset, size);
 832                         } else {
 833                                 if (file_size)
 834                                         offset %= file_size;
 835                                 else
 836                                         offset = 0;
 837                                 if (offset + size > file_size)
 838                                         size = file_size - offset;
 839                                 if (op != 0)
 840                                         domapread(offset, size);
 841                                 else
 842                                         doread(offset, size);
 843                         }
 844                 }
 845         }
 846         if (sizechecks && testcalls > simulatedopcount)
 847                 check_size();
 848         if (closeopen)
 849                 docloseopen();
 850 }
 851
 852
 853 void
 854 cleanup(sig)
 855         int     sig;
 856 {
 857         if (sig)
 858                 prt("signal %d\n", sig);
 859         prt("testcalls = %lu\n", testcalls);
 860         exit(sig);
 861 }
 862
 863
 864 void
 865 usage(void)
 866 {
 867         fprintf(stdout, "usage: %s",
 868                 "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\
 869         -b opnum: beginning operation number (default 1)\n\
 870         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
 871         -d: debug output for all operations\n\
 872         -l flen: the upper bound on file size (default 262144)\n\
 873         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
 874         -n: no verifications of file size\n\
 875         -o oplen: the upper bound on operation size (default 65536)\n\
 876         -p progressinterval: debug output at specified operation interval\n\
 877         -q: quieter operation\n\
 878         -r readbdy: 4096 would make reads page aligned (default 1)\n\
 879         -s style: 1 gives smaller truncates (default 0)\n\
 880         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
 881         -w writebdy: 4096 would make writes page aligned (default 1)\n\
 882         -D startingop: debug output starting at specified operation\n\
 883         -L: fsxLite - no file creations & no file size changes\n\
 884         -N numops: total # operations to do (default infinity)\n\
 885         -O: use oplen (see -o flag) for every op (default random)\n\
 886         -P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
 887         -S seed: for random # generator (default 1) 0 gets timestamp\n\
 888         -W: mapped write operations DISabled\n\
 889         -R: mapped read operations DISabled)\n\
 890         -U: msync after mapped write operations DISabled\n\
 891         fname: this filename is REQUIRED (no default)\n");
 892         exit(90);
 893 }
 894
 895
 896 int
 897 getnum(char *s, char **e)
 898 {
 899         int ret = -1;
 900
 901         *e = (char *) 0;
 902         ret = strtol(s, e, 0);
 903         if (*e)
 904                 switch (**e) {
 905                 case 'b':
 906                 case 'B':
 907                         ret *= 512;
 908                         *e = *e + 1;
 909                         break;
 910                 case 'k':
 911                 case 'K':
 912                         ret *= 1024;
 913                         *e = *e + 1;
 914                         break;
 915                 case 'm':
 916                 case 'M':
 917                         ret *= 1024*1024;
 918                         *e = *e + 1;
 919                         break;
 920                 case 'w':
 921                 case 'W':
 922                         ret *= 4;
 923                         *e = *e + 1;
 924                         break;
 925                 }
 926         return (ret);
 927 }
 928
 929
 930 int
 931 main(int argc, char **argv)
 932 {
 933         int     i, ch;
 934         char    *endp;
 935         char goodfile[1024];
 936         char logfile[1024];
 937
 938         goodfile[0] = 0;
 939         logfile[0] = 0;
 940
 941         page_size = getpagesize();
 942         page_mask = page_size - 1;
 943
 944         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
 945
 946         while ((ch = getopt(argc, argv,
 947             "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:UW")) != -1)
 948                 switch (ch) {
 949                 case 'b':
 950                         simulatedopcount = getnum(optarg, &endp);
 951                         if (!quiet)
 952                                 fprintf(stdout, "Will begin at operation %ld\n",
 953                                         simulatedopcount);
 954                         if (simulatedopcount == 0)
 955                                 usage();
 956                         simulatedopcount -= 1;
 957                         break;
 958                 case 'c':
 959                         closeprob = getnum(optarg, &endp);
 960                         if (!quiet)
 961                                 fprintf(stdout,
 962                                         "Chance of close/open is 1 in %d\n",
 963                                         closeprob);
 964                         if (closeprob <= 0)
 965                                 usage();
 966                         break;
 967                 case 'd':
 968                         debug = 1;
 969                         break;
 970                 case 'l':
 971                         maxfilelen = getnum(optarg, &endp);
 972                         if (maxfilelen <= 0)
 973                                 usage();
 974                         break;
 975                 case 'm':
 976                         monitorstart = getnum(optarg, &endp);
 977                         if (monitorstart < 0)
 978                                 usage();
 979                         if (!endp || *endp++ != ':')
 980                                 usage();
 981                         monitorend = getnum(endp, &endp);
 982                         if (monitorend < 0)
 983                                 usage();
 984                         if (monitorend == 0)
 985                                 monitorend = -1; /* aka infinity */
 986                         debug = 1;
 987                 case 'n':
 988                         sizechecks = 0;
 989                         break;
 990                 case 'o':
 991                         maxoplen = getnum(optarg, &endp);
 992                         if (maxoplen <= 0)
 993                                 usage();
 994                         break;
 995                 case 'p':
 996                         progressinterval = getnum(optarg, &endp);
 997                         if (progressinterval < 0)
 998                                 usage();
 999                         break;
1000                 case 'q':
1001                         quiet = 1;
1002                         break;
1003                 case 'r':
1004                         readbdy = getnum(optarg, &endp);
1005                         if (readbdy <= 0)
1006                                 usage();
1007                         break;
1008                 case 's':
1009                         style = getnum(optarg, &endp);
1010                         if (style < 0 || style > 1)
1011                                 usage();
1012                         break;
1013                 case 't':
1014                         truncbdy = getnum(optarg, &endp);
1015                         if (truncbdy <= 0)
1016                                 usage();
1017                         break;
1018                 case 'w':
1019                         writebdy = getnum(optarg, &endp);
1020                         if (writebdy <= 0)
1021                                 usage();
1022                         break;
1023                 case 'D':
1024                         debugstart = getnum(optarg, &endp);
1025                         if (debugstart < 1)
1026                                 usage();
1027                         break;
1028                 case 'L':
1029                         lite = 1;
1030                         break;
1031                 case 'N':
1032                         numops = getnum(optarg, &endp);
1033                         if (numops < 0)
1034                                 usage();
1035                         break;
1036                 case 'O':
1037                         randomoplen = 0;
1038                         break;
1039                 case 'P':
1040                         strncpy(goodfile, optarg, sizeof(goodfile));
1041                         strcat(goodfile, "/");
1042                         strncpy(logfile, optarg, sizeof(logfile));
1043                         strcat(logfile, "/");
1044                         break;
1045                 case 'R':
1046                         mapped_reads = 0;
1047                         break;
1048                 case 'S':
1049                         seed = getnum(optarg, &endp);
1050                         if (seed == 0)
1051                                 seed = time(0) % 10000;
1052                         if (!quiet)
1053                                 fprintf(stdout, "Seed set to %d\n", seed);
1054                         if (seed < 0)
1055                                 usage();
1056                         break;
1057                 case 'W':
1058                         mapped_writes = 0;
1059                         if (!quiet)
1060                                 fprintf(stdout, "mapped writes DISABLED\n");
1061                         break;
1062                 case 'U':
1063                         mapped_msync = 0;
1064                         if (!quiet)
1065                                 fprintf(stdout, "mapped msync DISABLED\n");
1066                         break;
1067
1068                 default:
1069                         usage();
1070                         /* NOTREACHED */
1071                 }
1072         argc -= optind;
1073         argv += optind;
1074         if (argc != 1)
1075                 usage();
1076         fname = argv[0];
1077
1078         signal(SIGHUP,  cleanup);
1079         signal(SIGINT,  cleanup);
1080         signal(SIGPIPE, cleanup);
1081         signal(SIGALRM, cleanup);
1082         signal(SIGTERM, cleanup);
1083         signal(SIGXCPU, cleanup);
1084         signal(SIGXFSZ, cleanup);
1085         signal(SIGVTALRM,       cleanup);
1086         signal(SIGUSR1, cleanup);
1087         signal(SIGUSR2, cleanup);
1088
1089         initstate(seed, state, 256);
1090         setstate(state);
1091         fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1092         if (fd < 0) {
1093                 prterr(fname);
1094                 exit(91);
1095         }
1096         strncat(goodfile, fname, 256);
1097         strcat (goodfile, ".fsxgood");
1098         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1099         if (fsxgoodfd < 0) {
1100                 prterr(goodfile);
1101                 exit(92);
1102         }
1103         strncat(logfile, fname, 256);
1104         strcat (logfile, ".fsxlog");
1105         fsxlogf = fopen(logfile, "w");
1106         if (fsxlogf == NULL) {
1107                 prterr(logfile);
1108                 exit(93);
1109         }
1110         if (lite) {
1111                 off_t ret;
1112                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1113                 if (file_size == (off_t)-1) {
1114                         prterr(fname);
1115                         warn("main: lseek eof");
1116                         exit(94);
1117                 }
1118                 ret = lseek(fd, (off_t)0, SEEK_SET);
1119                 if (ret == (off_t)-1) {
1120                         prterr(fname);
1121                         warn("main: lseek 0");
1122                         exit(95);
1123                 }
1124         }
1125         original_buf = (char *) malloc(maxfilelen);
1126         for (i = 0; i < maxfilelen; i++)
1127                 original_buf[i] = random() % 256;
1128         good_buf = (char *) malloc(maxfilelen);
1129         memset(good_buf, '\0', maxfilelen);
1130         temp_buf = (char *) malloc(maxoplen);
1131         memset(temp_buf, '\0', maxoplen);
1132         if (lite) {     /* zero entire existing file */
1133                 ssize_t written;
1134
1135                 written = write(fd, good_buf, (size_t)maxfilelen);
1136                 if (written != maxfilelen) {
1137                         if (written == -1) {
1138                                 prterr(fname);
1139                                 warn("main: error on write");
1140                         } else
1141                                 warn("main: short write, 0x%x bytes instead of 0x%x\n",
1142                                      (unsigned)written, maxfilelen);
1143                         exit(98);
1144                 }
1145         } else
1146                 check_trunc_hack();
1147
1148         while (numops == -1 || numops--)
1149                 test();
1150
1151         if (close(fd)) {
1152                 prterr("close");
1153                 report_failure(99);
1154         }
1155         prt("All operations completed A-OK!\n");
1156
1157         exit(0);
1158         return 0;
1159 }
1160