6/tools/regression/fsx/fsx.c

   1 /*
   2  * Copyright (c) 1998-2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 2.0 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  *
  22  *      File:   fsx.c
  23  *      Author: Avadis Tevanian, Jr.
  24  *
  25  *      File system exerciser.
  26  *
  27  *      Rewrite and enhancements 1998-2001 Conrad Minshall -- conrad@mac.com
  28  *
  29  *      Various features from Joe Sokol, Pat Dirks, and Clark Warner.
  30  *
  31  *      Small changes to work under Linux -- davej@suse.de
  32  *
  33  *      Sundry porting patches from Guy Harris 12/2001
  34  *
  35  *      Checks for mmap last-page zero fill.
  36  *
  37  *      Updated license to APSL 2.0, 2004/7/27 - Jordan Hubbard
  38  *
  39  * $FreeBSD$
  40  *
  41  */
  42
  43 #include <sys/types.h>
  44 #include <sys/stat.h>
  45 #ifdef _UWIN
  46 # include <sys/param.h>
  47 # include <limits.h>
  48 # include <time.h>
  49 # include <strings.h>
  50 #endif
  51 #include <fcntl.h>
  52 #include <sys/mman.h>
  53 #ifndef MAP_FILE
  54 # define MAP_FILE 0
  55 #endif
  56 #include <limits.h>
  57 #include <signal.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <unistd.h>
  62 #include <stdarg.h>
  63 #include <errno.h>
  64
  65 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  66
  67 /*
  68  *      A log entry is an operation and a bunch of arguments.
  69  */
  70
  71 struct log_entry {
  72         int     operation;
  73         int     args[3];
  74 };
  75
  76 #define LOGSIZE 1000
  77
  78 struct log_entry        oplog[LOGSIZE]; /* the log */
  79 int                     logptr = 0;     /* current position in log */
  80 int                     logcount = 0;   /* total ops */
  81
  82 /*
  83  *      Define operations
  84  */
  85
  86 #define OP_READ         1
  87 #define OP_WRITE        2
  88 #define OP_TRUNCATE     3
  89 #define OP_CLOSEOPEN    4
  90 #define OP_MAPREAD      5
  91 #define OP_MAPWRITE     6
  92 #define OP_SKIPPED      7
  93
  94 int page_size;
  95 int page_mask;
  96
  97 char    *original_buf;                  /* a pointer to the original data */
  98 char    *good_buf;                      /* a pointer to the correct data */
  99 char    *temp_buf;                      /* a pointer to the current data */
 100 char    *fname;                         /* name of our test file */
 101 int     fd;                             /* fd for our test file */
 102
 103 off_t           file_size = 0;
 104 off_t           biggest = 0;
 105 char            state[256];
 106 unsigned long   testcalls = 0;          /* calls to function "test" */
 107
 108 unsigned long   simulatedopcount = 0;   /* -b flag */
 109 int     closeprob = 0;                  /* -c flag */
 110 int     debug = 0;                      /* -d flag */
 111 unsigned long   debugstart = 0;         /* -D flag */
 112 unsigned long   maxfilelen = 256 * 1024;        /* -l flag */
 113 int     sizechecks = 1;                 /* -n flag disables them */
 114 int     maxoplen = 64 * 1024;           /* -o flag */
 115 int     quiet = 0;                      /* -q flag */
 116 unsigned long progressinterval = 0;     /* -p flag */
 117 int     readbdy = 1;                    /* -r flag */
 118 int     style = 0;                      /* -s flag */
 119 int     truncbdy = 1;                   /* -t flag */
 120 int     writebdy = 1;                   /* -w flag */
 121 long    monitorstart = -1;              /* -m flag */
 122 long    monitorend = -1;                /* -m flag */
 123 int     lite = 0;                       /* -L flag */
 124 long    numops = -1;                    /* -N flag */
 125 int     randomoplen = 1;                /* -O flag disables it */
 126 int     seed = 1;                       /* -S flag */
 127 int     mapped_writes = 1;            /* -W flag disables */
 128 int     mapped_reads = 1;               /* -R flag disables it */
 129 int     fsxgoodfd = 0;
 130 FILE *  fsxlogf = NULL;
 131 int badoff = -1;
 132 int closeopen = 0;
 133
 134
 135 void
 136 vwarnc(code, fmt, ap)
 137         int code;
 138         const char *fmt;
 139         va_list ap;
 140 {
 141         fprintf(stderr, "fsx: ");
 142         if (fmt != NULL) {
 143                 vfprintf(stderr, fmt, ap);
 144                 fprintf(stderr, ": ");
 145         }
 146         fprintf(stderr, "%s\n", strerror(code));
 147 }
 148
 149
 150 void
 151 warn(const char * fmt, ...)
 152 {
 153         va_list ap;
 154         va_start(ap, fmt);
 155         vwarnc(errno, fmt, ap);
 156         va_end(ap);
 157 }
 158
 159
 160 void
 161 prt(char *fmt, ...)
 162 {
 163         va_list args;
 164
 165         va_start(args, fmt);
 166         vfprintf(stdout, fmt, args);
 167         if (fsxlogf)
 168                 vfprintf(fsxlogf, fmt, args);
 169         va_end(args);
 170 }
 171
 172 void
 173 prterr(char *prefix)
 174 {
 175         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 176 }
 177
 178
 179 void
 180 log4(int operation, int arg0, int arg1, int arg2)
 181 {
 182         struct log_entry *le;
 183
 184         le = &oplog[logptr];
 185         le->operation = operation;
 186         if (closeopen)
 187                 le->operation = ~ le->operation;
 188         le->args[0] = arg0;
 189         le->args[1] = arg1;
 190         le->args[2] = arg2;
 191         logptr++;
 192         logcount++;
 193         if (logptr >= LOGSIZE)
 194                 logptr = 0;
 195 }
 196
 197
 198 void
 199 logdump(void)
 200 {
 201         int     i, count, down;
 202         struct log_entry        *lp;
 203
 204         prt("LOG DUMP (%d total operations):\n", logcount);
 205         if (logcount < LOGSIZE) {
 206                 i = 0;
 207                 count = logcount;
 208         } else {
 209                 i = logptr;
 210                 count = LOGSIZE;
 211         }
 212         for ( ; count > 0; count--) {
 213                 int opnum;
 214
 215                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 216                 prt("%d(%d mod 256): ", opnum, opnum%256);
 217                 lp = &oplog[i];
 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 save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
 302                              (unsigned long long)bufferlength);
 303                         bufferlength = size_by_seek;
 304                 }
 305         }
 306
 307         ret = lseek(fd, (off_t)0, SEEK_SET);
 308         if (ret == (off_t)-1)
 309                 prterr("save_buffer: lseek 0");
 310
 311         byteswritten = write(fd, buffer, (size_t)bufferlength);
 312         if (byteswritten != bufferlength) {
 313                 if (byteswritten == -1)
 314                         prterr("save_buffer write");
 315                 else
 316                         warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",
 317                              (unsigned)byteswritten,
 318                              (unsigned long long)bufferlength);
 319         }
 320 }
 321
 322
 323 void
 324 report_failure(int status)
 325 {
 326         logdump();
 327
 328         if (fsxgoodfd) {
 329                 if (good_buf) {
 330                         save_buffer(good_buf, file_size, fsxgoodfd);
 331                         prt("Correct content saved for comparison\n");
 332                         prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
 333                             fname, fname);
 334                 }
 335                 close(fsxgoodfd);
 336         }
 337         exit(status);
 338 }
 339
 340
 341 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 342                                         *(((unsigned char *)(cp)) + 1)))
 343
 344 void
 345 check_buffers(unsigned offset, unsigned size)
 346 {
 347         unsigned char c, t;
 348         unsigned i = 0;
 349         unsigned n = 0;
 350         unsigned op = 0;
 351         unsigned bad = 0;
 352
 353         if (memcmp(good_buf + offset, temp_buf, size) != 0) {
 354                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
 355                     offset, size);
 356                 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
 357                 while (size > 0) {
 358                         c = good_buf[offset];
 359                         t = temp_buf[i];
 360                         if (c != t) {
 361                                 if (n == 0) {
 362                                         bad = short_at(&temp_buf[i]);
 363                                         prt("0x%5x\t0x%04x\t0x%04x", offset,
 364                                             short_at(&good_buf[offset]), bad);
 365                                         op = temp_buf[offset & 1 ? i+1 : i];
 366                                 }
 367                                 n++;
 368                                 badoff = offset;
 369                         }
 370                         offset++;
 371                         i++;
 372                         size--;
 373                 }
 374                 if (n) {
 375                         prt("\t0x%5x\n", n);
 376                         if (bad)
 377                                 prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));
 378                         else
 379                                 prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
 380                 } else
 381                         prt("????????????????\n");
 382                 report_failure(110);
 383         }
 384 }
 385
 386
 387 void
 388 check_size(void)
 389 {
 390         struct stat     statbuf;
 391         off_t   size_by_seek;
 392
 393         if (fstat(fd, &statbuf)) {
 394                 prterr("check_size: fstat");
 395                 statbuf.st_size = -1;
 396         }
 397         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 398         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 399                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 400                     (unsigned long long)file_size,
 401                     (unsigned long long)statbuf.st_size,
 402                     (unsigned long long)size_by_seek);
 403                 report_failure(120);
 404         }
 405 }
 406
 407
 408 void
 409 check_trunc_hack(void)
 410 {
 411         struct stat statbuf;
 412
 413         ftruncate(fd, (off_t)0);
 414         ftruncate(fd, (off_t)100000);
 415         fstat(fd, &statbuf);
 416         if (statbuf.st_size != (off_t)100000) {
 417                 prt("no extend on truncate! not posix!\n");
 418                 exit(130);
 419         }
 420         ftruncate(fd, (off_t)0);
 421 }
 422
 423
 424 void
 425 doread(unsigned offset, unsigned size)
 426 {
 427         off_t ret;
 428         unsigned iret;
 429
 430         offset -= offset % readbdy;
 431         if (size == 0) {
 432                 if (!quiet && testcalls > simulatedopcount)
 433                         prt("skipping zero size read\n");
 434                 log4(OP_SKIPPED, OP_READ, offset, size);
 435                 return;
 436         }
 437         if (size + offset > file_size) {
 438                 if (!quiet && testcalls > simulatedopcount)
 439                         prt("skipping seek/read past end of file\n");
 440                 log4(OP_SKIPPED, OP_READ, offset, size);
 441                 return;
 442         }
 443
 444         log4(OP_READ, offset, size, 0);
 445
 446         if (testcalls <= simulatedopcount)
 447                 return;
 448
 449         if (!quiet && ((progressinterval &&
 450                         testcalls % progressinterval == 0) ||
 451                        (debug &&
 452                         (monitorstart == -1 ||
 453                          (offset + size > monitorstart &&
 454                           (monitorend == -1 || offset <= monitorend))))))
 455                 prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 456                     offset, offset + size - 1, size);
 457         ret = lseek(fd, (off_t)offset, SEEK_SET);
 458         if (ret == (off_t)-1) {
 459                 prterr("doread: lseek");
 460                 report_failure(140);
 461         }
 462         iret = read(fd, temp_buf, size);
 463         if (iret != size) {
 464                 if (iret == -1)
 465                         prterr("doread: read");
 466                 else
 467                         prt("short read: 0x%x bytes instead of 0x%x\n",
 468                             iret, size);
 469                 report_failure(141);
 470         }
 471         check_buffers(offset, size);
 472 }
 473
 474
 475 void
 476 check_eofpage(char *s, unsigned offset, char *p, int size)
 477 {
 478         unsigned last_page, should_be_zero;
 479
 480         if (offset + size <= (file_size & ~page_mask))
 481                 return;
 482         /*
 483          * we landed in the last page of the file
 484          * test to make sure the VM system provided 0's
 485          * beyond the true end of the file mapping
 486          * (as required by mmap def in 1996 posix 1003.1)
 487          */
 488         last_page = ((int)p + (offset & page_mask) + size) & ~page_mask;
 489
 490         for (should_be_zero = last_page + (file_size & page_mask);
 491              should_be_zero < last_page + page_size;
 492              should_be_zero++)
 493                 if (*(char *)should_be_zero) {
 494                         prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
 495                             s, file_size - 1, should_be_zero & page_mask,
 496                             short_at(should_be_zero));
 497                         report_failure(205);
 498                 }
 499 }
 500
 501
 502 void
 503 domapread(unsigned offset, unsigned size)
 504 {
 505         unsigned pg_offset;
 506         unsigned map_size;
 507         char    *p;
 508
 509         offset -= offset % readbdy;
 510         if (size == 0) {
 511                 if (!quiet && testcalls > simulatedopcount)
 512                         prt("skipping zero size read\n");
 513                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 514                 return;
 515         }
 516         if (size + offset > file_size) {
 517                 if (!quiet && testcalls > simulatedopcount)
 518                         prt("skipping seek/read past end of file\n");
 519                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 520                 return;
 521         }
 522
 523         log4(OP_MAPREAD, offset, size, 0);
 524
 525         if (testcalls <= simulatedopcount)
 526                 return;
 527
 528         if (!quiet && ((progressinterval &&
 529                         testcalls % progressinterval == 0) ||
 530                        (debug &&
 531                         (monitorstart == -1 ||
 532                          (offset + size > monitorstart &&
 533                           (monitorend == -1 || offset <= monitorend))))))
 534                 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 535                     offset, offset + size - 1, size);
 536
 537         pg_offset = offset & page_mask;
 538         map_size  = pg_offset + size;
 539
 540         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
 541                               (off_t)(offset - pg_offset))) == (char *)-1) {
 542                 prterr("domapread: mmap");
 543                 report_failure(190);
 544         }
 545         memcpy(temp_buf, p + pg_offset, size);
 546
 547         check_eofpage("Read", offset, p, size);
 548
 549         if (munmap(p, map_size) != 0) {
 550                 prterr("domapread: munmap");
 551                 report_failure(191);
 552         }
 553
 554         check_buffers(offset, size);
 555 }
 556
 557
 558 void
 559 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 560 {
 561         while (size--) {
 562                 good_buf[offset] = testcalls % 256;
 563                 if (offset % 2)
 564                         good_buf[offset] += original_buf[offset];
 565                 offset++;
 566         }
 567 }
 568
 569
 570 void
 571 dowrite(unsigned offset, unsigned size)
 572 {
 573         off_t ret;
 574         unsigned iret;
 575
 576         offset -= offset % writebdy;
 577         if (size == 0) {
 578                 if (!quiet && testcalls > simulatedopcount)
 579                         prt("skipping zero size write\n");
 580                 log4(OP_SKIPPED, OP_WRITE, offset, size);
 581                 return;
 582         }
 583
 584         log4(OP_WRITE, offset, size, file_size);
 585
 586         gendata(original_buf, good_buf, offset, size);
 587         if (file_size < offset + size) {
 588                 if (file_size < offset)
 589                         memset(good_buf + file_size, '\0', offset - file_size);
 590                 file_size = offset + size;
 591                 if (lite) {
 592                         warn("Lite file size bug in fsx!");
 593                         report_failure(149);
 594                 }
 595         }
 596
 597         if (testcalls <= simulatedopcount)
 598                 return;
 599
 600         if (!quiet && ((progressinterval &&
 601                         testcalls % progressinterval == 0) ||
 602                        (debug &&
 603                         (monitorstart == -1 ||
 604                          (offset + size > monitorstart &&
 605                           (monitorend == -1 || offset <= monitorend))))))
 606                 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 607                     offset, offset + size - 1, size);
 608         ret = lseek(fd, (off_t)offset, SEEK_SET);
 609         if (ret == (off_t)-1) {
 610                 prterr("dowrite: lseek");
 611                 report_failure(150);
 612         }
 613         iret = write(fd, good_buf + offset, size);
 614         if (iret != size) {
 615                 if (iret == -1)
 616                         prterr("dowrite: write");
 617                 else
 618                         prt("short write: 0x%x bytes instead of 0x%x\n",
 619                             iret, size);
 620                 report_failure(151);
 621         }
 622 }
 623
 624
 625 void
 626 domapwrite(unsigned offset, unsigned size)
 627 {
 628         unsigned pg_offset;
 629         unsigned map_size;
 630         off_t    cur_filesize;
 631         char    *p;
 632
 633         offset -= offset % writebdy;
 634         if (size == 0) {
 635                 if (!quiet && testcalls > simulatedopcount)
 636                         prt("skipping zero size write\n");
 637                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
 638                 return;
 639         }
 640         cur_filesize = file_size;
 641
 642         log4(OP_MAPWRITE, offset, size, 0);
 643
 644         gendata(original_buf, good_buf, offset, size);
 645         if (file_size < offset + size) {
 646                 if (file_size < offset)
 647                         memset(good_buf + file_size, '\0', offset - file_size);
 648                 file_size = offset + size;
 649                 if (lite) {
 650                         warn("Lite file size bug in fsx!");
 651                         report_failure(200);
 652                 }
 653         }
 654
 655         if (testcalls <= simulatedopcount)
 656                 return;
 657
 658         if (!quiet && ((progressinterval &&
 659                         testcalls % progressinterval == 0) ||
 660                        (debug &&
 661                         (monitorstart == -1 ||
 662                          (offset + size > monitorstart &&
 663                           (monitorend == -1 || offset <= monitorend))))))
 664                 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 665                     offset, offset + size - 1, size);
 666
 667         if (file_size > cur_filesize) {
 668                 if (ftruncate(fd, file_size) == -1) {
 669                         prterr("domapwrite: ftruncate");
 670                         exit(201);
 671                 }
 672         }
 673         pg_offset = offset & page_mask;
 674         map_size  = pg_offset + size;
 675
 676         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 677                               MAP_FILE | MAP_SHARED, fd,
 678                               (off_t)(offset - pg_offset))) == (char *)-1) {
 679                 prterr("domapwrite: mmap");
 680                 report_failure(202);
 681         }
 682         memcpy(p + pg_offset, good_buf + offset, size);
 683         if (msync(p, map_size, 0) != 0) {
 684                 prterr("domapwrite: msync");
 685                 report_failure(203);
 686         }
 687
 688         check_eofpage("Write", offset, p, size);
 689
 690         if (munmap(p, map_size) != 0) {
 691                 prterr("domapwrite: munmap");
 692                 report_failure(204);
 693         }
 694 }
 695
 696
 697 void
 698 dotruncate(unsigned size)
 699 {
 700         int oldsize = file_size;
 701
 702         size -= size % truncbdy;
 703         if (size > biggest) {
 704                 biggest = size;
 705                 if (!quiet && testcalls > simulatedopcount)
 706                         prt("truncating to largest ever: 0x%x\n", size);
 707         }
 708
 709         log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
 710
 711         if (size > file_size)
 712                 memset(good_buf + file_size, '\0', size - file_size);
 713         file_size = size;
 714
 715         if (testcalls <= simulatedopcount)
 716                 return;
 717
 718         if ((progressinterval && testcalls % progressinterval == 0) ||
 719             (debug && (monitorstart == -1 || monitorend == -1 ||
 720                        size <= monitorend)))
 721                 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
 722         if (ftruncate(fd, (off_t)size) == -1) {
 723                 prt("ftruncate1: %x\n", size);
 724                 prterr("dotruncate: ftruncate");
 725                 report_failure(160);
 726         }
 727 }
 728
 729
 730 void
 731 writefileimage()
 732 {
 733         ssize_t iret;
 734
 735         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 736                 prterr("writefileimage: lseek");
 737                 report_failure(171);
 738         }
 739         iret = write(fd, good_buf, file_size);
 740         if ((off_t)iret != file_size) {
 741                 if (iret == -1)
 742                         prterr("writefileimage: write");
 743                 else
 744                         prt("short write: 0x%x bytes instead of 0x%llx\n",
 745                             iret, (unsigned long long)file_size);
 746                 report_failure(172);
 747         }
 748         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 749                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
 750                 prterr("writefileimage: ftruncate");
 751                 report_failure(173);
 752         }
 753 }
 754
 755
 756 void
 757 docloseopen(void)
 758 {
 759         if (testcalls <= simulatedopcount)
 760                 return;
 761
 762         if (debug)
 763                 prt("%lu close/open\n", testcalls);
 764         if (close(fd)) {
 765                 prterr("docloseopen: close");
 766                 report_failure(180);
 767         }
 768         fd = open(fname, O_RDWR, 0);
 769         if (fd < 0) {
 770                 prterr("docloseopen: open");
 771                 report_failure(181);
 772         }
 773 }
 774
 775
 776 void
 777 test(void)
 778 {
 779         unsigned long   offset;
 780         unsigned long   size = maxoplen;
 781         unsigned long   rv = random();
 782         unsigned long   op = rv % (3 + !lite + mapped_writes);
 783
 784         /* turn off the map read if necessary */
 785
 786         if (op == 2 && !mapped_reads)
 787             op = 0;
 788
 789         if (simulatedopcount > 0 && testcalls == simulatedopcount)
 790                 writefileimage();
 791
 792         testcalls++;
 793
 794         if (closeprob)
 795                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
 796
 797         if (debugstart > 0 && testcalls >= debugstart)
 798                 debug = 1;
 799
 800         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
 801                 prt("%lu...\n", testcalls);
 802
 803         /*
 804          * READ:        op = 0
 805          * WRITE:       op = 1
 806          * MAPREAD:     op = 2
 807          * TRUNCATE:    op = 3
 808          * MAPWRITE:    op = 3 or 4
 809          */
 810         if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
 811                 dotruncate(random() % maxfilelen);
 812         else {
 813                 if (randomoplen)
 814                         size = random() % (maxoplen+1);
 815                 if (lite ? 0 : op == 3)
 816                         dotruncate(size);
 817                 else {
 818                         offset = random();
 819                         if (op == 1 || op == (lite ? 3 : 4)) {
 820                                 offset %= maxfilelen;
 821                                 if (offset + size > maxfilelen)
 822                                         size = maxfilelen - offset;
 823                                 if (op != 1)
 824                                         domapwrite(offset, size);
 825                                 else
 826                                         dowrite(offset, size);
 827                         } else {
 828                                 if (file_size)
 829                                         offset %= file_size;
 830                                 else
 831                                         offset = 0;
 832                                 if (offset + size > file_size)
 833                                         size = file_size - offset;
 834                                 if (op != 0)
 835                                         domapread(offset, size);
 836                                 else
 837                                         doread(offset, size);
 838                         }
 839                 }
 840         }
 841         if (sizechecks && testcalls > simulatedopcount)
 842                 check_size();
 843         if (closeopen)
 844                 docloseopen();
 845 }
 846
 847
 848 void
 849 cleanup(sig)
 850         int     sig;
 851 {
 852         if (sig)
 853                 prt("signal %d\n", sig);
 854         prt("testcalls = %lu\n", testcalls);
 855         exit(sig);
 856 }
 857
 858
 859 void
 860 usage(void)
 861 {
 862         fprintf(stdout, "usage: %s",
 863                 "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\
 864         -b opnum: beginning operation number (default 1)\n\
 865         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
 866         -d: debug output for all operations\n\
 867         -l flen: the upper bound on file size (default 262144)\n\
 868         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
 869         -n: no verifications of file size\n\
 870         -o oplen: the upper bound on operation size (default 65536)\n\
 871         -p progressinterval: debug output at specified operation interval\n\
 872         -q: quieter operation\n\
 873         -r readbdy: 4096 would make reads page aligned (default 1)\n\
 874         -s style: 1 gives smaller truncates (default 0)\n\
 875         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
 876         -w writebdy: 4096 would make writes page aligned (default 1)\n\
 877         -D startingop: debug output starting at specified operation\n\
 878         -L: fsxLite - no file creations & no file size changes\n\
 879         -N numops: total # operations to do (default infinity)\n\
 880         -O: use oplen (see -o flag) for every op (default random)\n\
 881         -P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
 882         -S seed: for random # generator (default 1) 0 gets timestamp\n\
 883         -W: mapped write operations DISabled\n\
 884         -R: mapped read operations DISabled)\n\
 885         fname: this filename is REQUIRED (no default)\n");
 886         exit(90);
 887 }
 888
 889
 890 int
 891 getnum(char *s, char **e)
 892 {
 893         int ret = -1;
 894
 895         *e = (char *) 0;
 896         ret = strtol(s, e, 0);
 897         if (*e)
 898                 switch (**e) {
 899                 case 'b':
 900                 case 'B':
 901                         ret *= 512;
 902                         *e = *e + 1;
 903                         break;
 904                 case 'k':
 905                 case 'K':
 906                         ret *= 1024;
 907                         *e = *e + 1;
 908                         break;
 909                 case 'm':
 910                 case 'M':
 911                         ret *= 1024*1024;
 912                         *e = *e + 1;
 913                         break;
 914                 case 'w':
 915                 case 'W':
 916                         ret *= 4;
 917                         *e = *e + 1;
 918                         break;
 919                 }
 920         return (ret);
 921 }
 922
 923
 924 int
 925 main(int argc, char **argv)
 926 {
 927         int     i, ch;
 928         char    *endp;
 929         char goodfile[1024];
 930         char logfile[1024];
 931
 932         goodfile[0] = 0;
 933         logfile[0] = 0;
 934
 935         page_size = getpagesize();
 936         page_mask = page_size - 1;
 937
 938         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
 939
 940         while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))
 941                != EOF)
 942                 switch (ch) {
 943                 case 'b':
 944                         simulatedopcount = getnum(optarg, &endp);
 945                         if (!quiet)
 946                                 fprintf(stdout, "Will begin at operation %ld\n",
 947                                         simulatedopcount);
 948                         if (simulatedopcount == 0)
 949                                 usage();
 950                         simulatedopcount -= 1;
 951                         break;
 952                 case 'c':
 953                         closeprob = getnum(optarg, &endp);
 954                         if (!quiet)
 955                                 fprintf(stdout,
 956                                         "Chance of close/open is 1 in %d\n",
 957                                         closeprob);
 958                         if (closeprob <= 0)
 959                                 usage();
 960                         break;
 961                 case 'd':
 962                         debug = 1;
 963                         break;
 964                 case 'l':
 965                         maxfilelen = getnum(optarg, &endp);
 966                         if (maxfilelen <= 0)
 967                                 usage();
 968                         break;
 969                 case 'm':
 970                         monitorstart = getnum(optarg, &endp);
 971                         if (monitorstart < 0)
 972                                 usage();
 973                         if (!endp || *endp++ != ':')
 974                                 usage();
 975                         monitorend = getnum(endp, &endp);
 976                         if (monitorend < 0)
 977                                 usage();
 978                         if (monitorend == 0)
 979                                 monitorend = -1; /* aka infinity */
 980                         debug = 1;
 981                 case 'n':
 982                         sizechecks = 0;
 983                         break;
 984                 case 'o':
 985                         maxoplen = getnum(optarg, &endp);
 986                         if (maxoplen <= 0)
 987                                 usage();
 988                         break;
 989                 case 'p':
 990                         progressinterval = getnum(optarg, &endp);
 991                         if (progressinterval < 0)
 992                                 usage();
 993                         break;
 994                 case 'q':
 995                         quiet = 1;
 996                         break;
 997                 case 'r':
 998                         readbdy = getnum(optarg, &endp);
 999                         if (readbdy <= 0)
1000                                 usage();
1001                         break;
1002                 case 's':
1003                         style = getnum(optarg, &endp);
1004                         if (style < 0 || style > 1)
1005                                 usage();
1006                         break;
1007                 case 't':
1008                         truncbdy = getnum(optarg, &endp);
1009                         if (truncbdy <= 0)
1010                                 usage();
1011                         break;
1012                 case 'w':
1013                         writebdy = getnum(optarg, &endp);
1014                         if (writebdy <= 0)
1015                                 usage();
1016                         break;
1017                 case 'D':
1018                         debugstart = getnum(optarg, &endp);
1019                         if (debugstart < 1)
1020                                 usage();
1021                         break;
1022                 case 'L':
1023                         lite = 1;
1024                         break;
1025                 case 'N':
1026                         numops = getnum(optarg, &endp);
1027                         if (numops < 0)
1028                                 usage();
1029                         break;
1030                 case 'O':
1031                         randomoplen = 0;
1032                         break;
1033                 case 'P':
1034                         strncpy(goodfile, optarg, sizeof(goodfile));
1035                         strcat(goodfile, "/");
1036                         strncpy(logfile, optarg, sizeof(logfile));
1037                         strcat(logfile, "/");
1038                         break;
1039                 case 'R':
1040                         mapped_reads = 0;
1041                         break;
1042                 case 'S':
1043                         seed = getnum(optarg, &endp);
1044                         if (seed == 0)
1045                                 seed = time(0) % 10000;
1046                         if (!quiet)
1047                                 fprintf(stdout, "Seed set to %d\n", seed);
1048                         if (seed < 0)
1049                                 usage();
1050                         break;
1051                 case 'W':
1052                         mapped_writes = 0;
1053                         if (!quiet)
1054                                 fprintf(stdout, "mapped writes DISABLED\n");
1055                         break;
1056
1057                 default:
1058                         usage();
1059                         /* NOTREACHED */
1060                 }
1061         argc -= optind;
1062         argv += optind;
1063         if (argc != 1)
1064                 usage();
1065         fname = argv[0];
1066
1067         signal(SIGHUP,  cleanup);
1068         signal(SIGINT,  cleanup);
1069         signal(SIGPIPE, cleanup);
1070         signal(SIGALRM, cleanup);
1071         signal(SIGTERM, cleanup);
1072         signal(SIGXCPU, cleanup);
1073         signal(SIGXFSZ, cleanup);
1074         signal(SIGVTALRM,       cleanup);
1075         signal(SIGUSR1, cleanup);
1076         signal(SIGUSR2, cleanup);
1077
1078         initstate(seed, state, 256);
1079         setstate(state);
1080         fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1081         if (fd < 0) {
1082                 prterr(fname);
1083                 exit(91);
1084         }
1085         strncat(goodfile, fname, 256);
1086         strcat (goodfile, ".fsxgood");
1087         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1088         if (fsxgoodfd < 0) {
1089                 prterr(goodfile);
1090                 exit(92);
1091         }
1092         strncat(logfile, fname, 256);
1093         strcat (logfile, ".fsxlog");
1094         fsxlogf = fopen(logfile, "w");
1095         if (fsxlogf == NULL) {
1096                 prterr(logfile);
1097                 exit(93);
1098         }
1099         if (lite) {
1100                 off_t ret;
1101                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1102                 if (file_size == (off_t)-1) {
1103                         prterr(fname);
1104                         warn("main: lseek eof");
1105                         exit(94);
1106                 }
1107                 ret = lseek(fd, (off_t)0, SEEK_SET);
1108                 if (ret == (off_t)-1) {
1109                         prterr(fname);
1110                         warn("main: lseek 0");
1111                         exit(95);
1112                 }
1113         }
1114         original_buf = (char *) malloc(maxfilelen);
1115         for (i = 0; i < maxfilelen; i++)
1116                 original_buf[i] = random() % 256;
1117         good_buf = (char *) malloc(maxfilelen);
1118         memset(good_buf, '\0', maxfilelen);
1119         temp_buf = (char *) malloc(maxoplen);
1120         memset(temp_buf, '\0', maxoplen);
1121         if (lite) {     /* zero entire existing file */
1122                 ssize_t written;
1123
1124                 written = write(fd, good_buf, (size_t)maxfilelen);
1125                 if (written != maxfilelen) {
1126                         if (written == -1) {
1127                                 prterr(fname);
1128                                 warn("main: error on write");
1129                         } else
1130                                 warn("main: short write, 0x%x bytes instead of 0x%x\n",
1131                                      (unsigned)written, maxfilelen);
1132                         exit(98);
1133                 }
1134         } else
1135                 check_trunc_hack();
1136
1137         while (numops == -1 || numops--)
1138                 test();
1139
1140         if (close(fd)) {
1141                 prterr("close");
1142                 report_failure(99);
1143         }
1144         prt("All operations completed A-OK!\n");
1145
1146         exit(0);
1147         return 0;
1148 }
1149