lustre/tests/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 1.1 (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  * $FreeBSD: src/tools/regression/fsx/fsx.c,v 1.1 2001/12/20 04:15:57 jkh Exp $
  35  */
  36
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39 #if defined(_UWIN) || defined(__linux__)
  40 # include <sys/param.h>
  41 # include <limits.h>
  42 # include <time.h>
  43 # include <strings.h>
  44 # include <sys/time.h>
  45 #endif
  46 #include <fcntl.h>
  47 #include <sys/mman.h>
  48 #ifndef MAP_FILE
  49 # define MAP_FILE 0
  50 #endif
  51 #include <limits.h>
  52 #include <signal.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <unistd.h>
  57 #include <stdarg.h>
  58 #include <errno.h>
  59
  60 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  61
  62 /*
  63  *      A log entry is an operation and a bunch of arguments.
  64  */
  65
  66 struct log_entry {
  67         int     operation;
  68         struct timeval tv;
  69         int     args[3];
  70 };
  71
  72 #define LOGSIZE 1000
  73
  74 struct log_entry        oplog[LOGSIZE]; /* the log */
  75 int                     logptr = 0;     /* current position in log */
  76 int                     logcount = 0;   /* total ops */
  77
  78 /*
  79  *      Define operations
  80  */
  81
  82 #define OP_READ         1
  83 #define OP_WRITE        2
  84 #define OP_TRUNCATE     3
  85 #define OP_CLOSEOPEN    4
  86 #define OP_MAPREAD      5
  87 #define OP_MAPWRITE     6
  88 #define OP_SKIPPED      7
  89
  90 int page_size;
  91 int page_mask;
  92
  93 char    *original_buf;                  /* a pointer to the original data */
  94 char    *good_buf;                      /* a pointer to the correct data */
  95 char    *temp_buf;                      /* a pointer to the current data */
  96 char    *fname;                         /* name of our test file */
  97 char    logfile[1024];                  /* name of our log file */
  98 char    goodfile[1024];                 /* name of our test file */
  99 int     fd;                             /* fd for our test file */
 100
 101 off_t           file_size = 0;
 102 off_t           biggest = 0;
 103 char            state[256];
 104 unsigned long   testcalls = 0;          /* calls to function "test" */
 105
 106 unsigned long   simulatedopcount = 0;   /* -b flag */
 107 int     closeprob = 0;                  /* -c flag */
 108 int     debug = 0;                      /* -d flag */
 109 unsigned long   debugstart = 0;         /* -D flag */
 110 unsigned long   maxfilelen = 256 * 1024;        /* -l flag */
 111 int     sizechecks = 1;                 /* -n flag disables them */
 112 int     maxoplen = 64 * 1024;           /* -o flag */
 113 int     quiet = 0;                      /* -q flag */
 114 unsigned long progressinterval = 0;     /* -p flag */
 115 int     readbdy = 1;                    /* -r flag */
 116 int     style = 0;                      /* -s flag */
 117 int     truncbdy = 1;                   /* -t flag */
 118 int     writebdy = 1;                   /* -w flag */
 119 long    monitorstart = -1;              /* -m flag */
 120 long    monitorend = -1;                /* -m flag */
 121 int     lite = 0;                       /* -L flag */
 122 long    numops = -1;                    /* -N flag */
 123 int     randomoplen = 1;                /* -O flag disables it */
 124 int     seed = 1;                       /* -S flag */
 125 int     mapped_writes = 1;              /* -W flag disables */
 126 int     mapped_reads = 1;               /* -R flag disables it */
 127 int     fsxgoodfd = 0;
 128 FILE *  fsxlogf = NULL;
 129 int badoff = -1;
 130 int closeopen = 0;
 131
 132
 133 void
 134 vwarnc(code, fmt, ap)
 135         int code;
 136         const char *fmt;
 137         va_list ap;
 138 {
 139         fprintf(stderr, "fsx: ");
 140         if (fmt != NULL) {
 141                 vfprintf(stderr, fmt, ap);
 142                 fprintf(stderr, ": ");
 143         }
 144         fprintf(stderr, "%s\n", strerror(code));
 145 }
 146
 147
 148 void
 149 warn(const char * fmt, ...)
 150 {
 151         va_list ap;
 152         va_start(ap, fmt);
 153         vwarnc(errno, fmt, ap);
 154         va_end(ap);
 155 }
 156
 157
 158 void
 159 prt(char *fmt, ...)
 160 {
 161         va_list args;
 162
 163         va_start(args, fmt);
 164         vfprintf(stdout, fmt, args);
 165         if (fsxlogf)
 166                 vfprintf(fsxlogf, fmt, args);
 167         va_end(args);
 168 }
 169
 170 void
 171 prterr(char *prefix)
 172 {
 173         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 174 }
 175
 176
 177 void
 178 log4(int operation, int arg0, int arg1, int arg2, struct timeval *tv)
 179 {
 180         struct log_entry *le;
 181
 182         le = &oplog[logptr];
 183         le->tv = *tv;
 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                 lp = &oplog[i];
 216                 prt("%d(%d mod 256): %lu.%lu ", opnum, opnum%256,
 217                     lp->tv.tv_sec, lp->tv.tv_usec);
 218                 if ((closeopen = lp->operation < 0))
 219                         lp->operation = ~ lp->operation;
 220
 221                 switch (lp->operation) {
 222                 case OP_MAPREAD:
 223                         prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
 224                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 225                             lp->args[1]);
 226                         if (badoff >= lp->args[0] && badoff <
 227                                                      lp->args[0] + lp->args[1])
 228                                 prt("\t***RRRR***");
 229                         break;
 230                 case OP_MAPWRITE:
 231                         prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
 232                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 233                             lp->args[1]);
 234                         if (badoff >= lp->args[0] && badoff <
 235                                                      lp->args[0] + lp->args[1])
 236                                 prt("\t******WWWW");
 237                         break;
 238                 case OP_READ:
 239                         prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
 240                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 241                             lp->args[1]);
 242                         if (badoff >= lp->args[0] &&
 243                             badoff < lp->args[0] + lp->args[1])
 244                                 prt("\t***RRRR***");
 245                         break;
 246                 case OP_WRITE:
 247                         prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
 248                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 249                             lp->args[1]);
 250                         if (lp->args[0] > lp->args[2])
 251                                 prt(" HOLE");
 252                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 253                                 prt(" EXTEND");
 254                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
 255                             badoff < lp->args[0] + lp->args[1])
 256                                 prt("\t***WWWW");
 257                         break;
 258                 case OP_TRUNCATE:
 259                         down = lp->args[0] < lp->args[1];
 260                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 261                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
 262                         if (badoff >= lp->args[!down] &&
 263                             badoff < lp->args[!!down])
 264                                 prt("\t******WWWW");
 265                         break;
 266                 case OP_SKIPPED:
 267                         prt("SKIPPED (no operation)");
 268                         break;
 269                 default:
 270                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 271                             lp->operation);
 272                 }
 273                 if (closeopen)
 274                         prt("\n\t\tCLOSE/OPEN");
 275                 prt("\n");
 276                 i++;
 277                 if (i == LOGSIZE)
 278                         i = 0;
 279         }
 280 }
 281
 282
 283 void
 284 save_buffer(char *buffer, off_t bufferlength, int fd)
 285 {
 286         off_t ret;
 287         ssize_t byteswritten;
 288
 289         if (fd <= 0 || bufferlength == 0)
 290                 return;
 291
 292         if (bufferlength > SSIZE_MAX) {
 293                 prt("fsx flaw: overflow in save_buffer\n");
 294                 exit(67);
 295         }
 296         if (lite) {
 297                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 298                 if (size_by_seek == (off_t)-1)
 299                         prterr("save_buffer: lseek eof");
 300                 else if (bufferlength > size_by_seek) {
 301                         warn("save_buffer: .fsxgood file too short... will
 302 save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
 303                              (unsigned long long)bufferlength);
 304                         bufferlength = size_by_seek;
 305                 }
 306         }
 307
 308         ret = lseek(fd, (off_t)0, SEEK_SET);
 309         if (ret == (off_t)-1)
 310                 prterr("save_buffer: lseek 0");
 311
 312         byteswritten = write(fd, buffer, (size_t)bufferlength);
 313         if (byteswritten != bufferlength) {
 314                 if (byteswritten == -1)
 315                         prterr("save_buffer write");
 316                 else
 317                         warn("save_buffer: short write, 0x%x bytes instead
 318 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\")\n",
 335                             fname, goodfile);
 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
 380 may be %u\n", ((unsigned)op & 0xff));
 381                         else
 382                                 prt("operation# (mod 256) for the bad data
 383 unknown, check HOLE and EXTEND ops\n");
 384                 } else
 385                         prt("????????????????\n");
 386                 report_failure(110);
 387         }
 388 }
 389
 390
 391 void
 392 check_size(void)
 393 {
 394         struct stat     statbuf;
 395         off_t   size_by_seek;
 396
 397         if (fstat(fd, &statbuf)) {
 398                 prterr("check_size: fstat");
 399                 statbuf.st_size = -1;
 400         }
 401         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 402         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 403                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 404                     (unsigned long long)file_size,
 405                     (unsigned long long)statbuf.st_size,
 406                     (unsigned long long)size_by_seek);
 407                 report_failure(120);
 408         }
 409 }
 410
 411
 412 void
 413 check_trunc_hack(void)
 414 {
 415         struct stat statbuf;
 416
 417         ftruncate(fd, (off_t)0);
 418         ftruncate(fd, (off_t)100000);
 419         fstat(fd, &statbuf);
 420         if (statbuf.st_size != (off_t)100000) {
 421                 prt("no extend on truncate! not posix!\n");
 422                 exit(130);
 423         }
 424         ftruncate(fd, 0);
 425 }
 426
 427
 428 void
 429 doread(unsigned offset, unsigned size)
 430 {
 431         struct timeval t;
 432         off_t ret;
 433         unsigned iret;
 434
 435         offset -= offset % readbdy;
 436         gettimeofday(&t, NULL);
 437         if (size == 0) {
 438                 if (!quiet && testcalls > simulatedopcount)
 439                         prt("skipping zero size read\n");
 440                 log4(OP_SKIPPED, OP_READ, offset, size, &t);
 441                 return;
 442         }
 443         if (size + offset > file_size) {
 444                 if (!quiet && testcalls > simulatedopcount)
 445                         prt("skipping seek/read past end of file\n");
 446                 log4(OP_SKIPPED, OP_READ, offset, size, &t);
 447                 return;
 448         }
 449
 450         log4(OP_READ, offset, size, 0, &t);
 451
 452         if (testcalls <= simulatedopcount)
 453                 return;
 454
 455         if (!quiet && ((progressinterval &&
 456                         testcalls % progressinterval == 0) ||
 457                        (debug &&
 458                         (monitorstart == -1 ||
 459                          (offset + size > monitorstart &&
 460                           (monitorend == -1 || offset <= monitorend))))))
 461                 prt("%lu %lu.%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n",
 462                     testcalls, t.tv_sec, t.tv_usec, offset, offset + size - 1,
 463                     size);
 464         ret = lseek(fd, (off_t)offset, SEEK_SET);
 465         if (ret == (off_t)-1) {
 466                 prterr("doread: lseek");
 467                 report_failure(140);
 468         }
 469         iret = read(fd, temp_buf, size);
 470         if (iret != size) {
 471                 if (iret == -1)
 472                         prterr("doread: read");
 473                 else
 474                         prt("short read: 0x%x bytes instead of 0x%x\n",
 475                             iret, size);
 476                 report_failure(141);
 477         }
 478         check_buffers(offset, size);
 479 }
 480
 481
 482 void
 483 domapread(unsigned offset, unsigned size)
 484 {
 485         struct timeval t;
 486         unsigned pg_offset;
 487         unsigned map_size;
 488         char    *p;
 489
 490         offset -= offset % readbdy;
 491         gettimeofday(&t, NULL);
 492         if (size == 0) {
 493                 if (!quiet && testcalls > simulatedopcount)
 494                         prt("skipping zero size read\n");
 495                 log4(OP_SKIPPED, OP_MAPREAD, offset, size, &t);
 496                 return;
 497         }
 498         if (size + offset > file_size) {
 499                 if (!quiet && testcalls > simulatedopcount)
 500                         prt("skipping seek/read past end of file\n");
 501                 log4(OP_SKIPPED, OP_MAPREAD, offset, size, &t);
 502                 return;
 503         }
 504
 505         log4(OP_MAPREAD, offset, size, 0, &t);
 506
 507         if (testcalls <= simulatedopcount)
 508                 return;
 509
 510         if (!quiet && ((progressinterval &&
 511                         testcalls % progressinterval == 0) ||
 512                        (debug &&
 513                         (monitorstart == -1 ||
 514                          (offset + size > monitorstart &&
 515                           (monitorend == -1 || offset <= monitorend))))))
 516                 prt("%lu %lu.%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n",
 517                     testcalls, t.tv_sec, t.tv_usec, offset, offset + size - 1,
 518                     size);
 519
 520         pg_offset = offset & page_mask;
 521         map_size  = pg_offset + size;
 522
 523         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
 524                               (off_t)(offset - pg_offset))) == (char *)-1) {
 525                 prterr("domapread: mmap");
 526                 report_failure(190);
 527         }
 528         memcpy(temp_buf, p + pg_offset, size);
 529         if (munmap(p, map_size) != 0) {
 530                 prterr("domapread: munmap");
 531                 report_failure(191);
 532         }
 533
 534         check_buffers(offset, size);
 535 }
 536
 537
 538 void
 539 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 540 {
 541         while (size--) {
 542                 good_buf[offset] = testcalls % 256;
 543                 if (offset % 2)
 544                         good_buf[offset] += original_buf[offset];
 545                 offset++;
 546         }
 547 }
 548
 549
 550 void
 551 dowrite(unsigned offset, unsigned size)
 552 {
 553         struct timeval t;
 554         off_t ret;
 555         unsigned iret;
 556
 557         offset -= offset % writebdy;
 558         gettimeofday(&t, NULL);
 559         if (size == 0) {
 560                 if (!quiet && testcalls > simulatedopcount)
 561                         prt("skipping zero size write\n");
 562                 log4(OP_SKIPPED, OP_WRITE, offset, size, &t);
 563                 return;
 564         }
 565
 566         log4(OP_WRITE, offset, size, file_size, &t);
 567
 568         gendata(original_buf, good_buf, offset, size);
 569         if (file_size < offset + size) {
 570                 if (file_size < offset)
 571                         memset(good_buf + file_size, '\0', offset - file_size);
 572                 file_size = offset + size;
 573                 if (lite) {
 574                         warn("Lite file size bug in fsx!");
 575                         report_failure(149);
 576                 }
 577         }
 578
 579         if (testcalls <= simulatedopcount)
 580                 return;
 581
 582         if (!quiet && ((progressinterval &&
 583                         testcalls % progressinterval == 0) ||
 584                        (debug &&
 585                         (monitorstart == -1 ||
 586                          (offset + size > monitorstart &&
 587                           (monitorend == -1 || offset <= monitorend))))))
 588                 prt("%lu %lu.%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n",
 589                     testcalls, t.tv_sec, t.tv_usec, offset, offset + size - 1,
 590                     size);
 591         ret = lseek(fd, (off_t)offset, SEEK_SET);
 592         if (ret == (off_t)-1) {
 593                 prterr("dowrite: lseek");
 594                 report_failure(150);
 595         }
 596         iret = write(fd, good_buf + offset, size);
 597         if (iret != size) {
 598                 if (iret == -1)
 599                         prterr("dowrite: write");
 600                 else
 601                         prt("short write: 0x%x bytes instead of 0x%x\n",
 602                             iret, size);
 603                 report_failure(151);
 604         }
 605 }
 606
 607
 608 void
 609 domapwrite(unsigned offset, unsigned size)
 610 {
 611         struct timeval t;
 612         unsigned pg_offset;
 613         unsigned map_size;
 614         off_t    cur_filesize;
 615         char    *p;
 616
 617         offset -= offset % writebdy;
 618         gettimeofday(&t, NULL);
 619         if (size == 0) {
 620                 if (!quiet && testcalls > simulatedopcount)
 621                         prt("skipping zero size write\n");
 622                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size, &t);
 623                 return;
 624         }
 625         cur_filesize = file_size;
 626
 627         log4(OP_MAPWRITE, offset, size, 0, &t);
 628
 629         gendata(original_buf, good_buf, offset, size);
 630         if (file_size < offset + size) {
 631                 if (file_size < offset)
 632                         memset(good_buf + file_size, '\0', offset - file_size);
 633                 file_size = offset + size;
 634                 if (lite) {
 635                         warn("Lite file size bug in fsx!");
 636                         report_failure(200);
 637                 }
 638         }
 639
 640         if (testcalls <= simulatedopcount)
 641                 return;
 642
 643         if (!quiet && ((progressinterval &&
 644                         testcalls % progressinterval == 0) ||
 645                        (debug &&
 646                         (monitorstart == -1 ||
 647                          (offset + size > monitorstart &&
 648                           (monitorend == -1 || offset <= monitorend))))))
 649                 prt("%lu %lu.%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n",
 650                     testcalls, t.tv_sec, t.tv_usec, offset, offset + size - 1,
 651                     size);
 652
 653         if (file_size > cur_filesize) {
 654                 if (ftruncate(fd, file_size) == -1) {
 655                         prterr("domapwrite: ftruncate");
 656                         exit(201);
 657                 }
 658         }
 659         pg_offset = offset & page_mask;
 660         map_size  = pg_offset + size;
 661
 662         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 663                               MAP_FILE | MAP_SHARED, fd,
 664                               (off_t)(offset - pg_offset))) == (char *)-1) {
 665                 prterr("domapwrite: mmap");
 666                 report_failure(202);
 667         }
 668         memcpy(p + pg_offset, good_buf + offset, size);
 669         if (msync(p, map_size, 0) != 0) {
 670                 prterr("domapwrite: msync");
 671                 report_failure(203);
 672         }
 673         if (munmap(p, map_size) != 0) {
 674                 prterr("domapwrite: munmap");
 675                 report_failure(204);
 676         }
 677 }
 678
 679
 680 void
 681 dotruncate(unsigned size)
 682 {
 683         struct timeval t;
 684         int oldsize = file_size;
 685
 686         size -= size % truncbdy;
 687         gettimeofday(&t, NULL);
 688         if (size > biggest) {
 689                 biggest = size;
 690                 if (!quiet && testcalls > simulatedopcount)
 691                         prt("truncating to largest ever: 0x%x\n", size);
 692         }
 693
 694         log4(OP_TRUNCATE, size, (unsigned)file_size, 0, &t);
 695
 696         if (size > file_size)
 697                 memset(good_buf + file_size, '\0', size - file_size);
 698         file_size = size;
 699
 700         if (testcalls <= simulatedopcount)
 701                 return;
 702
 703         if ((progressinterval && testcalls % progressinterval == 0) ||
 704             (debug && (monitorstart == -1 || monitorend == -1 ||
 705                        size <= monitorend)))
 706                 prt("%lu %lu.%lu trunc\tfrom 0x%x to 0x%x\n",
 707                     testcalls, t.tv_sec, t.tv_usec, oldsize, size);
 708         if (ftruncate(fd, (off_t)size) == -1) {
 709                 prt("ftruncate1: %x\n", size);
 710                 prterr("dotruncate: ftruncate");
 711                 report_failure(160);
 712         }
 713 }
 714
 715
 716 void
 717 writefileimage()
 718 {
 719         ssize_t iret;
 720
 721         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 722                 prterr("writefileimage: lseek");
 723                 report_failure(171);
 724         }
 725         iret = write(fd, good_buf, file_size);
 726         if ((off_t)iret != file_size) {
 727                 if (iret == -1)
 728                         prterr("writefileimage: write");
 729                 else
 730                         prt("short write: 0x%x bytes instead of 0x%llx\n",
 731                             iret, (unsigned long long)file_size);
 732                 report_failure(172);
 733         }
 734         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 735                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
 736                 prterr("writefileimage: ftruncate");
 737                 report_failure(173);
 738         }
 739 }
 740
 741
 742 void
 743 docloseopen(void)
 744 {
 745         struct timeval t;
 746
 747         if (testcalls <= simulatedopcount)
 748                 return;
 749
 750         log4(OP_CLOSEOPEN, file_size, (unsigned)file_size, 0, &t);
 751
 752         gettimeofday(&t, NULL);
 753         if (debug)
 754                 prt("%lu %lu.%lu close/open\n", testcalls, t.tv_sec, t.tv_usec);
 755         if (close(fd)) {
 756                 prterr("docloseopen: close");
 757                 report_failure(180);
 758         }
 759         fd = open(fname, O_RDWR, 0);
 760         if (fd < 0) {
 761                 prterr("docloseopen: open");
 762                 report_failure(181);
 763         }
 764 }
 765
 766
 767 void
 768 test(void)
 769 {
 770         unsigned long   offset;
 771         unsigned long   size = maxoplen;
 772         unsigned long   rv = random();
 773         unsigned long   op = rv % (3 + !lite + mapped_writes);
 774
 775         /* turn off the map read if necessary */
 776
 777         if (op == 2 && !mapped_reads)
 778             op = 0;
 779
 780         if (simulatedopcount > 0 && testcalls == simulatedopcount)
 781                 writefileimage();
 782
 783         testcalls++;
 784
 785         if (closeprob)
 786                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
 787
 788         if (debugstart > 0 && testcalls >= debugstart)
 789                 debug = 1;
 790
 791         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
 792                 prt("%lu...\n", testcalls);
 793
 794         /*
 795          * READ:        op = 0
 796          * WRITE:       op = 1
 797          * MAPREAD:     op = 2
 798          * TRUNCATE:    op = 3
 799          * MAPWRITE:    op = 3 or 4
 800          */
 801         if (lite ? 0 : op == 3 && (style & 1) == 0) /* vanilla truncate? */
 802                 dotruncate(random() % maxfilelen);
 803         else {
 804                 if (randomoplen)
 805                         size = random() % (maxoplen+1);
 806                 if (lite ? 0 : op == 3)
 807                         dotruncate(size);
 808                 else {
 809                         offset = random();
 810                         if (op == 1 || op == (lite ? 3 : 4)) {
 811                                 offset %= maxfilelen;
 812                                 if (offset + size > maxfilelen)
 813                                         size = maxfilelen - offset;
 814                                 if (op != 1)
 815                                         domapwrite(offset, size);
 816                                 else
 817                                         dowrite(offset, size);
 818                         } else {
 819                                 if (file_size)
 820                                         offset %= file_size;
 821                                 else
 822                                         offset = 0;
 823                                 if (offset + size > file_size)
 824                                         size = file_size - offset;
 825                                 if (op != 0)
 826                                         domapread(offset, size);
 827                                 else
 828                                         doread(offset, size);
 829                         }
 830                 }
 831         }
 832         if (sizechecks && testcalls > simulatedopcount)
 833                 check_size();
 834         if (closeopen)
 835                 docloseopen();
 836 }
 837
 838
 839 void
 840 cleanup(sig)
 841         int     sig;
 842 {
 843         if (sig)
 844                 prt("signal %d\n", sig);
 845         prt("testcalls = %lu\n", testcalls);
 846         exit(sig);
 847 }
 848
 849
 850 void
 851 usage(void)
 852 {
 853         fprintf(stdout, "usage: %s",
 854                 "fsx [-dnqLOW] [-b opnum] [-c Prob] [-l flen] [-m
 855 start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t
 856 truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed]
 857 fname\n\
 858         -b opnum: beginning operation number (default 1)\n\
 859         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
 860         -d: debug output for all operations\n\
 861         -l flen: the upper bound on file size (default 262144)\n\
 862         -m startop:endop: monitor (print debug output) specified byte range
 863 (default 0:infinity)\n\
 864         -n: no verifications of file size\n\
 865         -o oplen: the upper bound on operation size (default 65536)\n\
 866         -p progressinterval: debug output at specified operation interval\n\
 867         -q: quieter operation\n\
 868         -r readbdy: 4096 would make reads page aligned (default 1)\n\
 869         -s style: 1 gives smaller truncates (default 0)\n\
 870         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
 871         -w writebdy: 4096 would make writes page aligned (default 1)\n\
 872         -D startingop: debug output starting at specified operation\n\
 873         -L: fsxLite - no file creations & no file size changes\n\
 874         -N numops: total # operations to do (default infinity)\n\
 875         -O: use oplen (see -o flag) for every op (default random)\n\
 876         -P: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
 877         -S seed: for random # generator (default 1) 0 gets timestamp\n\
 878         -W: mapped write operations DISabled\n\
 879         -R: read() system calls only (mapped reads disabled)\n\
 880         fname: this filename is REQUIRED (no default)\n");
 881         exit(90);
 882 }
 883
 884
 885 int
 886 getnum(char *s, char **e)
 887 {
 888         int ret = -1;
 889
 890         *e = (char *) 0;
 891         ret = strtol(s, e, 0);
 892         if (*e)
 893                 switch (**e) {
 894                 case 'b':
 895                 case 'B':
 896                         ret *= 512;
 897                         *e = *e + 1;
 898                         break;
 899                 case 'k':
 900                 case 'K':
 901                         ret *= 1024;
 902                         *e = *e + 1;
 903                         break;
 904                 case 'm':
 905                 case 'M':
 906                         ret *= 1024*1024;
 907                         *e = *e + 1;
 908                         break;
 909                 case 'w':
 910                 case 'W':
 911                         ret *= 4;
 912                         *e = *e + 1;
 913                         break;
 914                 }
 915         return (ret);
 916 }
 917
 918
 919 static const char *basename(const char *path)
 920 {
 921         char *c = strrchr(path, '/');
 922
 923         return c ? c++ : path;
 924 }
 925
 926 int
 927 main(int argc, char **argv)
 928 {
 929         int     i, style, ch;
 930         char    *endp;
 931         int  dirpath = 0;
 932
 933         goodfile[0] = 0;
 934         logfile[0] = 0;
 935
 936         page_size = getpagesize();
 937         page_mask = page_size - 1;
 938
 939         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
 940
 941         while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))
 942                != EOF)
 943                 switch (ch) {
 944                 case 'b':
 945                         simulatedopcount = getnum(optarg, &endp);
 946                         if (!quiet)
 947                                 fprintf(stdout, "Will begin at operation
 948 %ld\n",
 949                                         simulatedopcount);
 950                         if (simulatedopcount == 0)
 951                                 usage();
 952                         simulatedopcount -= 1;
 953                         break;
 954                 case 'c':
 955                         closeprob = getnum(optarg, &endp);
 956                         if (!quiet)
 957                                 fprintf(stdout,
 958                                         "Chance of close/open is 1 in %d\n",
 959                                         closeprob);
 960                         if (closeprob <= 0)
 961                                 usage();
 962                         break;
 963                 case 'd':
 964                         debug = 1;
 965                         break;
 966                 case 'l':
 967                         maxfilelen = getnum(optarg, &endp);
 968                         if (maxfilelen <= 0)
 969                                 usage();
 970                         break;
 971                 case 'm':
 972                         monitorstart = getnum(optarg, &endp);
 973                         if (monitorstart < 0)
 974                                 usage();
 975                         if (!endp || *endp++ != ':')
 976                                 usage();
 977                         monitorend = getnum(endp, &endp);
 978                         if (monitorend < 0)
 979                                 usage();
 980                         if (monitorend == 0)
 981                                 monitorend = -1; /* aka infinity */
 982                         debug = 1;
 983                 case 'n':
 984                         sizechecks = 0;
 985                         break;
 986                 case 'o':
 987                         maxoplen = getnum(optarg, &endp);
 988                         if (maxoplen <= 0)
 989                                 usage();
 990                         break;
 991                 case 'p':
 992                         progressinterval = getnum(optarg, &endp);
 993                         if (progressinterval < 0)
 994                                 usage();
 995                         break;
 996                 case 'q':
 997                         quiet = 1;
 998                         break;
 999                 case 'r':
1000                         readbdy = getnum(optarg, &endp);
1001                         if (readbdy <= 0)
1002                                 usage();
1003                         break;
1004                 case 's':
1005                         style = getnum(optarg, &endp);
1006                         if (style < 0 || style > 1)
1007                                 usage();
1008                         break;
1009                 case 't':
1010                         truncbdy = getnum(optarg, &endp);
1011                         if (truncbdy <= 0)
1012                                 usage();
1013                         break;
1014                 case 'w':
1015                         writebdy = getnum(optarg, &endp);
1016                         if (writebdy <= 0)
1017                                 usage();
1018                         break;
1019                 case 'D':
1020                         debugstart = getnum(optarg, &endp);
1021                         if (debugstart < 1)
1022                                 usage();
1023                         break;
1024                 case 'L':
1025                         lite = 1;
1026                         break;
1027                 case 'N':
1028                         numops = getnum(optarg, &endp);
1029                         if (numops < 0)
1030                                 usage();
1031                         break;
1032                 case 'O':
1033                         randomoplen = 0;
1034                         break;
1035                 case 'P':
1036                         strncpy(goodfile, optarg, sizeof(goodfile));
1037                         strcat(goodfile, "/");
1038                         strncpy(logfile, optarg, sizeof(logfile));
1039                         strcat(logfile, "/");
1040                         dirpath = 1;
1041                         break;
1042                 case 'R':
1043                         mapped_reads = 0;
1044                         break;
1045                 case 'S':
1046                         seed = getnum(optarg, &endp);
1047                         if (seed == 0)
1048                                 seed = time(0) % 10000;
1049                         if (!quiet)
1050                                 fprintf(stdout, "Seed set to %d\n", seed);
1051                         if (seed < 0)
1052                                 usage();
1053                         break;
1054                 case 'W':
1055                         mapped_writes = 0;
1056                         if (!quiet)
1057                                 fprintf(stdout, "mapped writes DISABLED\n");
1058                         break;
1059
1060                 default:
1061                         usage();
1062                         /* NOTREACHED */
1063                 }
1064         argc -= optind;
1065         argv += optind;
1066         if (argc != 1)
1067                 usage();
1068         fname = argv[0];
1069
1070         signal(SIGHUP,  cleanup);
1071         signal(SIGINT,  cleanup);
1072         signal(SIGPIPE, cleanup);
1073         signal(SIGALRM, cleanup);
1074         signal(SIGTERM, cleanup);
1075         signal(SIGXCPU, cleanup);
1076         signal(SIGXFSZ, cleanup);
1077         signal(SIGVTALRM,       cleanup);
1078         signal(SIGUSR1, cleanup);
1079         signal(SIGUSR2, cleanup);
1080
1081         initstate(seed, state, 256);
1082         setstate(state);
1083         fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1084         if (fd < 0) {
1085                 prterr(fname);
1086                 exit(91);
1087         }
1088         strncat(goodfile, dirpath ? basename(fname) : fname, 256);
1089         strcat (goodfile, ".fsxgood");
1090         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1091         if (fsxgoodfd < 0) {
1092                 prterr(goodfile);
1093                 exit(92);
1094         }
1095         strncat(logfile, dirpath ? basename(fname) : fname, 256);
1096         strcat (logfile, ".fsxlog");
1097         fsxlogf = fopen(logfile, "w");
1098         if (fsxlogf == NULL) {
1099                 prterr(logfile);
1100                 exit(93);
1101         }
1102         if (lite) {
1103                 off_t ret;
1104                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1105                 if (file_size == (off_t)-1) {
1106                         prterr(fname);
1107                         warn("main: lseek eof");
1108                         exit(94);
1109                 }
1110                 ret = lseek(fd, (off_t)0, SEEK_SET);
1111                 if (ret == (off_t)-1) {
1112                         prterr(fname);
1113                         warn("main: lseek 0");
1114                         exit(95);
1115                 }
1116         }
1117         original_buf = (char *) malloc(maxfilelen);
1118         for (i = 0; i < maxfilelen; i++)
1119                 original_buf[i] = random() % 256;
1120         good_buf = (char *) malloc(maxfilelen);
1121         memset(good_buf, '\0', maxfilelen);
1122         temp_buf = (char *) malloc(maxoplen);
1123         memset(temp_buf, '\0', maxoplen);
1124         if (lite) {     /* zero entire existing file */
1125                 ssize_t written;
1126
1127                 written = write(fd, good_buf, (size_t)maxfilelen);
1128                 if (written != maxfilelen) {
1129                         if (written == -1) {
1130                                 prterr(fname);
1131                                 warn("main: error on write");
1132                         } else
1133                                 warn("main: short write, 0x%x bytes instead
1134 of 0x%x\n",
1135                                      (unsigned)written, maxfilelen);
1136                         exit(98);
1137                 }
1138         } else
1139                 check_trunc_hack();
1140
1141         while (numops == -1 || numops--)
1142                 test();
1143
1144         if (close(fd)) {
1145                 prterr("close");
1146                 report_failure(99);
1147         }
1148         prt("All operations completed A-OK!\n");
1149
1150         exit(0);
1151         return 0;
1152 }