test/stress/fsx/fsx.c

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