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