test/stress/fsx/fsx.c

   1 /*
   2  * Copyright (c) 1998-2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.2 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  *
  22  *      File:   fsx.c
  23  *      Author: Avadis Tevanian, Jr.
  24  *
  25  *      File system exerciser.
  26  *
  27  *      Rewrite and enhancements 1998-2001 Conrad Minshall -- conrad@mac.com
  28  *
  29  *      Various features from Joe Sokol, Pat Dirks, and Clark Warner.
  30  *
  31  *      Small changes to work under Linux -- davej@suse.de
  32  *
  33  *      Sundry porting patches from Guy Harris 12/2001
  34  *
  35  *      Checks for mmap last-page zero fill.
  36  *
  37  * $FreeBSD: src/tools/regression/fsx/fsx.c,v 1.2 2003/04/23 23:42:23 jkh Exp $
  38  * $DragonFly: src/test/stress/fsx/fsx.c,v 1.2 2005/05/02 19:31:56 dillon Exp $
  39  *
  40  */
  41
  42 #include <sys/types.h>
  43 #include <sys/stat.h>
  44 #include <fcntl.h>
  45 #include <sys/mman.h>
  46 #include <limits.h>
  47 #include <signal.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <unistd.h>
  52 #include <stdarg.h>
  53 #include <errno.h>
  54 #include <setjmp.h>
  55
  56 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  57
  58 /*
  59  *      A log entry is an operation and a bunch of arguments.
  60  */
  61
  62 struct log_entry {
  63         int     operation;
  64         int     args[3];
  65 };
  66
  67 #define LOGSIZE 1000
  68
  69 struct log_entry        oplog[LOGSIZE]; /* the log */
  70 int                     logptr = 0;     /* current position in log */
  71 int                     logcount = 0;   /* total ops */
  72 int                     jmpbuf_good;
  73 jmp_buf                 jmpbuf;
  74
  75 static void log4(int operation, int arg0, int arg1, int arg2);
  76 static void vwarnc(int code, const char *fmt, va_list ap);
  77 static void warn(const char * fmt, ...);
  78 static void prt(const char *fmt, ...);
  79 static void prterr(const char *prefix);
  80 static void logdump(void);
  81 static void save_buffer(char *buffer, off_t bufferlength, int fd);
  82 static void report_failure(int status);
  83 static void check_buffers(unsigned offset, unsigned size);
  84 static void check_trunc_hack(void);
  85 static void check_size(void);
  86 static void doread(unsigned offset, unsigned size);
  87 static void check_eofpage(const char *s, unsigned offset, char *p, int size);
  88 static void domapread(unsigned offset, unsigned size);
  89 static void gendata(char *original_buf, char *good_buf,
  90                                 unsigned offset, unsigned size);
  91 static void dowrite(unsigned offset, unsigned size);
  92 static void domapwrite(unsigned offset, unsigned size);
  93 static void dotruncate(unsigned size);
  94 static void docloseopen(void);
  95 static void test(void);
  96 static void segv(int sig);
  97 static void cleanup(int sig);
  98 static void usage(void);
  99 static int getnum(char *s, char **e);
 100
 101 /*
 102  *      Define operations
 103  */
 104
 105 #define OP_READ         1
 106 #define OP_WRITE        2
 107 #define OP_TRUNCATE     3
 108 #define OP_CLOSEOPEN    4
 109 #define OP_MAPREAD      5
 110 #define OP_MAPWRITE     6
 111 #define OP_SKIPPED      7
 112
 113 int page_size;
 114 int page_mask;
 115
 116 char    *original_buf;                  /* a pointer to the original data */
 117 char    *good_buf;                      /* a pointer to the correct data */
 118 char    *temp_buf;                      /* a pointer to the current data */
 119 char    *fname;                         /* name of our test file */
 120 int     fd;                             /* fd for our test file */
 121
 122 off_t           file_size = 0;
 123 off_t           biggest = 0;
 124 char            state[256];
 125 unsigned long   testcalls = 0;          /* calls to function "test" */
 126
 127 unsigned long   simulatedopcount = 0;   /* -b flag */
 128 int     closeprob = 0;                  /* -c flag */
 129 int     debug = 0;                      /* -d flag */
 130 unsigned long   debugstart = 0;         /* -D flag */
 131 unsigned long   maxfilelen = 256 * 1024;        /* -l flag */
 132 int     sizechecks = 1;                 /* -n flag disables them */
 133 int     maxoplen = 64 * 1024;           /* -o flag */
 134 int     quiet = 0;                      /* -q flag */
 135 unsigned long progressinterval = 0;     /* -p flag */
 136 int     readbdy = 1;                    /* -r flag */
 137 int     style = 0;                      /* -s flag */
 138 int     truncbdy = 1;                   /* -t flag */
 139 int     writebdy = 1;                   /* -w flag */
 140 long    monitorstart = -1;              /* -m flag */
 141 long    monitorend = -1;                /* -m flag */
 142 int     lite = 0;                       /* -L flag */
 143 long    numops = -1;                    /* -N flag */
 144 int     randomoplen = 1;                /* -O flag disables it */
 145 int     seed = 1;                       /* -S flag */
 146 int     mapped_writes = 1;            /* -W flag disables */
 147 int     mapped_reads = 1;               /* -R flag disables it */
 148 int     fsxgoodfd = 0;
 149 FILE *  fsxlogf = NULL;
 150 int badoff = -1;
 151 int closeopen = 0;
 152
 153
 154 static
 155 void
 156 vwarnc(int code, const char *fmt, va_list ap)
 157 {
 158         fprintf(stderr, "fsx: ");
 159         if (fmt != NULL) {
 160                 vfprintf(stderr, fmt, ap);
 161                 fprintf(stderr, ": ");
 162         }
 163         fprintf(stderr, "%s\n", strerror(code));
 164 }
 165
 166 static
 167 void
 168 warn(const char * fmt, ...)
 169 {
 170         va_list ap;
 171         va_start(ap, fmt);
 172         vwarnc(errno, fmt, ap);
 173         va_end(ap);
 174 }
 175
 176
 177 static
 178 void
 179 prt(const char *fmt, ...)
 180 {
 181         va_list args;
 182
 183         va_start(args, fmt);
 184         vfprintf(stdout, fmt, args);
 185         if (fsxlogf)
 186                 vfprintf(fsxlogf, fmt, args);
 187         va_end(args);
 188 }
 189
 190 static
 191 void
 192 prterr(const char *prefix)
 193 {
 194         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 195 }
 196
 197 static void
 198 log4(int operation, int arg0, int arg1, int arg2)
 199 {
 200         struct log_entry *le;
 201
 202         le = &oplog[logptr];
 203         le->operation = operation;
 204         if (closeopen)
 205                 le->operation = ~ le->operation;
 206         le->args[0] = arg0;
 207         le->args[1] = arg1;
 208         le->args[2] = arg2;
 209         logptr++;
 210         logcount++;
 211         if (logptr >= LOGSIZE)
 212                 logptr = 0;
 213 }
 214
 215
 216 static
 217 void
 218 logdump(void)
 219 {
 220         int     i, count, down;
 221         struct log_entry        *lp;
 222
 223         prt("LOG DUMP (%d total operations):\n", logcount);
 224         if (logcount < LOGSIZE) {
 225                 i = 0;
 226                 count = logcount;
 227         } else {
 228                 i = logptr;
 229                 count = LOGSIZE;
 230         }
 231         for ( ; count > 0; count--) {
 232                 int opnum;
 233
 234                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 235                 prt("%d(%d mod 256): ", opnum, opnum%256);
 236                 lp = &oplog[i];
 237                 if ((closeopen = lp->operation < 0))
 238                         lp->operation = ~ lp->operation;
 239
 240                 switch (lp->operation) {
 241                 case OP_MAPREAD:
 242                         prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
 243                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 244                             lp->args[1]);
 245                         if (badoff >= lp->args[0] && badoff <
 246                                                      lp->args[0] + lp->args[1])
 247                                 prt("\t***RRRR***");
 248                         break;
 249                 case OP_MAPWRITE:
 250                         prt("MAPWRITE\t0x%x thru 0x%x\t(0x%x bytes)",
 251                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 252                             lp->args[1]);
 253                         if (badoff >= lp->args[0] && badoff <
 254                                                      lp->args[0] + lp->args[1])
 255                                 prt("\t******WWWW");
 256                         break;
 257                 case OP_READ:
 258                         prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
 259                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 260                             lp->args[1]);
 261                         if (badoff >= lp->args[0] &&
 262                             badoff < lp->args[0] + lp->args[1])
 263                                 prt("\t***RRRR***");
 264                         break;
 265                 case OP_WRITE:
 266                         prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
 267                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 268                             lp->args[1]);
 269                         if (lp->args[0] > lp->args[2])
 270                                 prt(" HOLE");
 271                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 272                                 prt(" EXTEND");
 273                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
 274                             badoff < lp->args[0] + lp->args[1])
 275                                 prt("\t***WWWW");
 276                         break;
 277                 case OP_TRUNCATE:
 278                         down = lp->args[0] < lp->args[1];
 279                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 280                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
 281                         if (badoff >= lp->args[!down] &&
 282                             badoff < lp->args[!!down])
 283                                 prt("\t******WWWW");
 284                         break;
 285                 case OP_SKIPPED:
 286                         prt("SKIPPED (no operation)");
 287                         break;
 288                 default:
 289                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 290                             lp->operation);
 291                 }
 292                 if (closeopen)
 293                         prt("\n\t\tCLOSE/OPEN");
 294                 prt("\n");
 295                 i++;
 296                 if (i == LOGSIZE)
 297                         i = 0;
 298         }
 299 }
 300
 301 static
 302 void
 303 save_buffer(char *buffer, off_t bufferlength, int xfd)
 304 {
 305         off_t ret;
 306         ssize_t byteswritten;
 307
 308         if (xfd <= 0 || bufferlength == 0)
 309                 return;
 310
 311         if (bufferlength > SSIZE_MAX) {
 312                 prt("fsx flaw: overflow in save_buffer\n");
 313                 exit(67);
 314         }
 315         if (lite) {
 316                 off_t size_by_seek = lseek(xfd, (off_t)0, SEEK_END);
 317                 if (size_by_seek == (off_t)-1)
 318                         prterr("save_buffer: lseek eof");
 319                 else if (bufferlength > size_by_seek) {
 320                         warn("save_buffer: .fsxgood file too short... "
 321                              "will save 0x%jx bytes instead of 0x%llx\n",
 322                              (intmax_t)size_by_seek,
 323                              (intmax_t)bufferlength);
 324                         bufferlength = size_by_seek;
 325                 }
 326         }
 327
 328         ret = lseek(xfd, (off_t)0, SEEK_SET);
 329         if (ret == (off_t)-1)
 330                 prterr("save_buffer: lseek 0");
 331
 332         byteswritten = write(xfd, buffer, (size_t)bufferlength);
 333         if (byteswritten != bufferlength) {
 334                 if (byteswritten == -1)
 335                         prterr("save_buffer write");
 336                 else
 337                         warn("save_buffer: short write, "
 338                              "0x%x bytes instead of 0x%jx\n",
 339                              (unsigned)byteswritten,
 340                              (intmax_t)bufferlength);
 341         }
 342 }
 343
 344
 345 static
 346 void
 347 report_failure(int status)
 348 {
 349         logdump();
 350
 351         if (fsxgoodfd) {
 352                 if (good_buf) {
 353                         save_buffer(good_buf, file_size, fsxgoodfd);
 354                         prt("Correct content saved for comparison\n");
 355                         prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
 356                             fname, fname);
 357                 }
 358                 close(fsxgoodfd);
 359         }
 360         exit(status);
 361 }
 362
 363
 364 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 365                                         *(((unsigned char *)(cp)) + 1)))
 366
 367 static
 368 void
 369 check_buffers(unsigned offset, unsigned size)
 370 {
 371         unsigned char c, t;
 372         unsigned i = 0;
 373         unsigned n = 0;
 374         unsigned op = 0;
 375         unsigned bad = 0;
 376
 377         if (memcmp(good_buf + offset, temp_buf, size) != 0) {
 378                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
 379                     offset, size);
 380                 prt("OFFSET\t\tGOOD\tBAD\tRANGE\n");
 381                 while (size > 0) {
 382                         c = good_buf[offset];
 383                         t = temp_buf[i];
 384                         if (c != t) {
 385                                 if (n == 0) {
 386                                         bad = short_at(&temp_buf[i]);
 387                                         prt("0x%08x\t0x%04x\t0x%04x", offset,
 388                                             short_at(&good_buf[offset]), bad);
 389                                         op = temp_buf[offset & 1 ? i+1 : i];
 390                                 }
 391                                 n++;
 392                                 badoff = offset;
 393                         }
 394                         offset++;
 395                         i++;
 396                         size--;
 397                 }
 398                 if (n) {
 399                         prt("\t0x%5x\n", n);
 400                         if (bad)
 401                                 prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));
 402                         else
 403                                 prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
 404                 } else
 405                         prt("????????????????\n");
 406                 report_failure(110);
 407         }
 408 }
 409
 410 static
 411 void
 412 check_size(void)
 413 {
 414         struct stat     statbuf;
 415         off_t   size_by_seek;
 416
 417         if (fstat(fd, &statbuf)) {
 418                 prterr("check_size: fstat");
 419                 statbuf.st_size = -1;
 420         }
 421         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 422         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 423                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 424                     (unsigned long long)file_size,
 425                     (unsigned long long)statbuf.st_size,
 426                     (unsigned long long)size_by_seek);
 427                 report_failure(120);
 428         }
 429 }
 430
 431 static
 432 void
 433 check_trunc_hack(void)
 434 {
 435         struct stat statbuf;
 436
 437         ftruncate(fd, (off_t)0);
 438         ftruncate(fd, (off_t)100000);
 439         fstat(fd, &statbuf);
 440         if (statbuf.st_size != (off_t)100000) {
 441                 prt("no extend on truncate! not posix!\n");
 442                 exit(130);
 443         }
 444         ftruncate(fd, (off_t)0);
 445 }
 446
 447 static
 448 void
 449 doread(unsigned offset, unsigned size)
 450 {
 451         off_t ret;
 452         unsigned iret;
 453
 454         offset -= offset % readbdy;
 455         if (size == 0) {
 456                 if (!quiet && testcalls > simulatedopcount)
 457                         prt("skipping zero size read\n");
 458                 log4(OP_SKIPPED, OP_READ, offset, size);
 459                 return;
 460         }
 461         if (size + offset > file_size) {
 462                 if (!quiet && testcalls > simulatedopcount)
 463                         prt("skipping seek/read past end of file\n");
 464                 log4(OP_SKIPPED, OP_READ, offset, size);
 465                 return;
 466         }
 467
 468         log4(OP_READ, offset, size, 0);
 469
 470         if (testcalls <= simulatedopcount)
 471                 return;
 472
 473         if (!quiet && ((progressinterval &&
 474                         testcalls % progressinterval == 0) ||
 475                        (debug &&
 476                         (monitorstart == -1 ||
 477                          (offset + size > monitorstart &&
 478                           (monitorend == -1 || offset <= monitorend))))))
 479                 prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 480                     offset, offset + size - 1, size);
 481         ret = lseek(fd, (off_t)offset, SEEK_SET);
 482         if (ret == (off_t)-1) {
 483                 prterr("doread: lseek");
 484                 report_failure(140);
 485         }
 486         iret = read(fd, temp_buf, size);
 487         if (iret != size) {
 488                 if (iret == -1)
 489                         prterr("doread: read");
 490                 else
 491                         prt("short read: 0x%x bytes instead of 0x%x\n",
 492                             iret, size);
 493                 report_failure(141);
 494         }
 495         check_buffers(offset, size);
 496 }
 497
 498 static
 499 void
 500 check_eofpage(const char *s, unsigned offset, char *p, int size)
 501 {
 502         intptr_t last_page, should_be_zero;
 503
 504         if (offset + size <= (file_size & ~page_mask))
 505                 return;
 506         /*
 507          * we landed in the last page of the file
 508          * test to make sure the VM system provided 0's
 509          * beyond the true end of the file mapping
 510          * (as required by mmap def in 1996 posix 1003.1)
 511          */
 512         last_page = ((intptr_t)p + (offset & page_mask) + size) & ~(intptr_t)page_mask;
 513
 514         for (should_be_zero = last_page + (file_size & page_mask);
 515              should_be_zero < last_page + page_size;
 516              should_be_zero++) {
 517                 if (*(char *)should_be_zero) {
 518                         prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
 519                             s, file_size - 1, should_be_zero & page_mask,
 520                             *(char *)(should_be_zero));
 521                         report_failure(205);
 522                 }
 523         }
 524 }
 525
 526 static
 527 void
 528 domapread(unsigned offset, unsigned size)
 529 {
 530         unsigned pg_offset;
 531         unsigned map_size;
 532         char    *p;
 533
 534         offset -= offset % readbdy;
 535         if (size == 0) {
 536                 if (!quiet && testcalls > simulatedopcount)
 537                         prt("skipping zero size read\n");
 538                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 539                 return;
 540         }
 541         if (size + offset > file_size) {
 542                 if (!quiet && testcalls > simulatedopcount)
 543                         prt("skipping seek/read past end of file\n");
 544                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
 545                 return;
 546         }
 547
 548         log4(OP_MAPREAD, offset, size, 0);
 549
 550         if (testcalls <= simulatedopcount)
 551                 return;
 552
 553         if (!quiet && ((progressinterval &&
 554                         testcalls % progressinterval == 0) ||
 555                        (debug &&
 556                         (monitorstart == -1 ||
 557                          (offset + size > monitorstart &&
 558                           (monitorend == -1 || offset <= monitorend))))))
 559                 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 560                     offset, offset + size - 1, size);
 561
 562         pg_offset = offset & page_mask;
 563         map_size  = pg_offset + size;
 564
 565         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
 566                               (off_t)(offset - pg_offset))) == (char *)-1) {
 567                 prterr("domapread: mmap");
 568                 report_failure(190);
 569         }
 570         if (setjmp(jmpbuf) == 0) {
 571             jmpbuf_good = 1;
 572             memcpy(temp_buf, p + pg_offset, size);
 573             check_eofpage("Read", offset, p, size);
 574             jmpbuf_good = 0;
 575         } else {
 576             report_failure(1901);
 577         }
 578
 579         if (munmap(p, map_size) != 0) {
 580                 prterr("domapread: munmap");
 581                 report_failure(191);
 582         }
 583
 584         check_buffers(offset, size);
 585 }
 586
 587 static
 588 void
 589 gendata(char *obuf, char *gbuf, unsigned offset, unsigned size)
 590 {
 591         while (size--) {
 592                 gbuf[offset] = testcalls % 256;
 593                 if (offset % 2)
 594                         gbuf[offset] += obuf[offset];
 595                 offset++;
 596         }
 597 }
 598
 599 static
 600 void
 601 dowrite(unsigned offset, unsigned size)
 602 {
 603         off_t ret;
 604         unsigned iret;
 605
 606         offset -= offset % writebdy;
 607         if (size == 0) {
 608                 if (!quiet && testcalls > simulatedopcount)
 609                         prt("skipping zero size write\n");
 610                 log4(OP_SKIPPED, OP_WRITE, offset, size);
 611                 return;
 612         }
 613
 614         log4(OP_WRITE, offset, size, file_size);
 615
 616         gendata(original_buf, good_buf, offset, size);
 617         if (file_size < offset + size) {
 618                 if (file_size < offset)
 619                         memset(good_buf + file_size, '\0', offset - file_size);
 620                 file_size = offset + size;
 621                 if (lite) {
 622                         warn("Lite file size bug in fsx!");
 623                         report_failure(149);
 624                 }
 625         }
 626
 627         if (testcalls <= simulatedopcount)
 628                 return;
 629
 630         if (!quiet && ((progressinterval &&
 631                         testcalls % progressinterval == 0) ||
 632                        (debug &&
 633                         (monitorstart == -1 ||
 634                          (offset + size > monitorstart &&
 635                           (monitorend == -1 || offset <= monitorend))))))
 636                 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 637                     offset, offset + size - 1, size);
 638         ret = lseek(fd, (off_t)offset, SEEK_SET);
 639         if (ret == (off_t)-1) {
 640                 prterr("dowrite: lseek");
 641                 report_failure(150);
 642         }
 643         iret = write(fd, good_buf + offset, size);
 644         if (iret != size) {
 645                 if (iret == -1)
 646                         prterr("dowrite: write");
 647                 else
 648                         prt("short write: 0x%x bytes instead of 0x%x\n",
 649                             iret, size);
 650                 report_failure(151);
 651         }
 652 }
 653
 654 static
 655 void
 656 domapwrite(unsigned offset, unsigned size)
 657 {
 658         unsigned pg_offset;
 659         unsigned map_size;
 660         off_t    cur_filesize;
 661         char    *p;
 662
 663         offset -= offset % writebdy;
 664         if (size == 0) {
 665                 if (!quiet && testcalls > simulatedopcount)
 666                         prt("skipping zero size write\n");
 667                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
 668                 return;
 669         }
 670         cur_filesize = file_size;
 671
 672         log4(OP_MAPWRITE, offset, size, 0);
 673
 674         gendata(original_buf, good_buf, offset, size);
 675         if (file_size < offset + size) {
 676                 if (file_size < offset)
 677                         memset(good_buf + file_size, '\0', offset - file_size);
 678                 file_size = offset + size;
 679                 if (lite) {
 680                         warn("Lite file size bug in fsx!");
 681                         report_failure(200);
 682                 }
 683         }
 684
 685         if (testcalls <= simulatedopcount)
 686                 return;
 687
 688         if (!quiet && ((progressinterval &&
 689                         testcalls % progressinterval == 0) ||
 690                        (debug &&
 691                         (monitorstart == -1 ||
 692                          (offset + size > monitorstart &&
 693                           (monitorend == -1 || offset <= monitorend))))))
 694                 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 695                     offset, offset + size - 1, size);
 696
 697         if (file_size > cur_filesize) {
 698                 if (ftruncate(fd, file_size) == -1) {
 699                         prterr("domapwrite: ftruncate");
 700                         exit(201);
 701                 }
 702         }
 703         pg_offset = offset & page_mask;
 704         map_size  = pg_offset + size;
 705
 706         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 707                               MAP_FILE | MAP_SHARED, fd,
 708                               (off_t)(offset - pg_offset))) == (char *)-1) {
 709                 prterr("domapwrite: mmap");
 710                 report_failure(202);
 711         }
 712         if (setjmp(jmpbuf) == 0) {
 713             jmpbuf_good = 1;
 714             memcpy(p + pg_offset, good_buf + offset, size);
 715             if (msync(p, map_size, 0) != 0) {
 716                     prterr("domapwrite: msync");
 717                     report_failure(203);
 718             }
 719             check_eofpage("Write", offset, p, size);
 720             jmpbuf_good = 0;
 721         } else {
 722             report_failure(2021);
 723         }
 724
 725         if (munmap(p, map_size) != 0) {
 726                 prterr("domapwrite: munmap");
 727                 report_failure(204);
 728         }
 729 }
 730
 731 static
 732 void
 733 dotruncate(unsigned size)
 734 {
 735         int oldsize = file_size;
 736
 737         size -= size % truncbdy;
 738         if (size > biggest) {
 739                 biggest = size;
 740                 if (!quiet && testcalls > simulatedopcount)
 741                         prt("truncating to largest ever: 0x%x\n", size);
 742         }
 743
 744         log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
 745
 746         if (size > file_size)
 747                 memset(good_buf + file_size, '\0', size - file_size);
 748         file_size = size;
 749
 750         if (testcalls <= simulatedopcount)
 751                 return;
 752
 753         if ((progressinterval && testcalls % progressinterval == 0) ||
 754             (debug && (monitorstart == -1 || monitorend == -1 ||
 755                        size <= monitorend)))
 756                 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
 757         if (ftruncate(fd, (off_t)size) == -1) {
 758                 prt("ftruncate1: %x\n", size);
 759                 prterr("dotruncate: ftruncate");
 760                 report_failure(160);
 761         }
 762 }
 763
 764
 765 void
 766 writefileimage()
 767 {
 768         ssize_t iret;
 769
 770         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
 771                 prterr("writefileimage: lseek");
 772                 report_failure(171);
 773         }
 774         iret = write(fd, good_buf, file_size);
 775         if ((off_t)iret != file_size) {
 776                 if (iret == -1)
 777                         prterr("writefileimage: write");
 778                 else
 779                         prt("short write: 0x%x bytes instead of 0x%jx\n",
 780                             iret, (intmax_t)file_size);
 781                 report_failure(172);
 782         }
 783         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
 784                 prt("ftruncate2: %jx\n", (intmax_t)file_size);
 785                 prterr("writefileimage: ftruncate");
 786                 report_failure(173);
 787         }
 788 }
 789
 790 static
 791 void
 792 docloseopen(void)
 793 {
 794         if (testcalls <= simulatedopcount)
 795                 return;
 796
 797         if (debug)
 798                 prt("%lu close/open\n", testcalls);
 799         if (close(fd)) {
 800                 prterr("docloseopen: close");
 801                 report_failure(180);
 802         }
 803         fd = open(fname, O_RDWR, 0);
 804         if (fd < 0) {
 805                 prterr("docloseopen: open");
 806                 report_failure(181);
 807         }
 808 }
 809
 810 static
 811 void
 812 test(void)
 813 {
 814         unsigned long   offset;
 815         unsigned long   size = maxoplen;
 816         unsigned long   rv = random();
 817         unsigned long   op = rv % (3 + !lite + mapped_writes);
 818
 819         /* turn off the map read if necessary */
 820
 821         if (op == 2 && !mapped_reads)
 822             op = 0;
 823
 824         if (simulatedopcount > 0 && testcalls == simulatedopcount)
 825                 writefileimage();
 826
 827         testcalls++;
 828
 829         if (closeprob)
 830                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
 831
 832         if (debugstart > 0 && testcalls >= debugstart)
 833                 debug = 1;
 834
 835         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
 836                 prt("%lu...\n", testcalls);
 837
 838         /*
 839          * READ:        op = 0
 840          * WRITE:       op = 1
 841          * MAPREAD:     op = 2
 842          * TRUNCATE:    op = 3
 843          * MAPWRITE:    op = 3 or 4
 844          */
 845         if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
 846                 dotruncate(random() % maxfilelen);
 847         else {
 848                 if (randomoplen)
 849                         size = random() % (maxoplen+1);
 850                 if (lite ? 0 : op == 3)
 851                         dotruncate(size);
 852                 else {
 853                         offset = random();
 854                         if (op == 1 || op == (lite ? 3 : 4)) {
 855                                 offset %= maxfilelen;
 856                                 if (offset + size > maxfilelen)
 857                                         size = maxfilelen - offset;
 858                                 if (op != 1)
 859                                         domapwrite(offset, size);
 860                                 else
 861                                         dowrite(offset, size);
 862                         } else {
 863                                 if (file_size)
 864                                         offset %= file_size;
 865                                 else
 866                                         offset = 0;
 867                                 if (offset + size > file_size)
 868                                         size = file_size - offset;
 869                                 if (op != 0)
 870                                         domapread(offset, size);
 871                                 else
 872                                         doread(offset, size);
 873                         }
 874                 }
 875         }
 876         if (sizechecks && testcalls > simulatedopcount)
 877                 check_size();
 878         if (closeopen)
 879                 docloseopen();
 880 }
 881
 882 static
 883 void
 884 segv(int sig)
 885 {
 886         if (jmpbuf_good) {
 887             jmpbuf_good = 0;
 888             longjmp(jmpbuf, 1);
 889         }
 890         report_failure(9999);
 891 }
 892
 893 static
 894 void
 895 cleanup(int sig)
 896 {
 897         if (sig)
 898                 prt("signal %d\n", sig);
 899         prt("testcalls = %lu\n", testcalls);
 900         exit(sig);
 901 }
 902
 903 static
 904 void
 905 usage(void)
 906 {
 907         fprintf(stdout, "usage: %s",
 908                 "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\
 909         -b opnum: beginning operation number (default 1)\n\
 910         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
 911         -d: debug output for all operations\n\
 912         -l flen: the upper bound on file size (default 262144)\n\
 913         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
 914         -n: no verifications of file size\n\
 915         -o oplen: the upper bound on operation size (default 65536)\n\
 916         -p progressinterval: debug output at specified operation interval\n\
 917         -q: quieter operation\n\
 918         -r readbdy: 4096 would make reads page aligned (default 1)\n\
 919         -s style: 1 gives smaller truncates (default 0)\n\
 920         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
 921         -w writebdy: 4096 would make writes page aligned (default 1)\n\
 922         -D startingop: debug output starting at specified operation\n\
 923         -L: fsxLite - no file creations & no file size changes\n\
 924         -N numops: total # operations to do (default infinity)\n\
 925         -O: use oplen (see -o flag) for every op (default random)\n\
 926         -P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
 927         -S seed: for random # generator (default 1) 0 gets timestamp\n\
 928         -W: mapped write operations DISabled\n\
 929         -R: mapped read operations DISabled)\n\
 930         fname: this filename is REQUIRED (no default)\n");
 931         exit(90);
 932 }
 933
 934 static
 935 int
 936 getnum(char *s, char **e)
 937 {
 938         int ret = -1;
 939
 940         *e = NULL;
 941         ret = strtol(s, e, 0);
 942         if (*e)
 943                 switch (**e) {
 944                 case 'b':
 945                 case 'B':
 946                         ret *= 512;
 947                         *e = *e + 1;
 948                         break;
 949                 case 'k':
 950                 case 'K':
 951                         ret *= 1024;
 952                         *e = *e + 1;
 953                         break;
 954                 case 'm':
 955                 case 'M':
 956                         ret *= 1024*1024;
 957                         *e = *e + 1;
 958                         break;
 959                 case 'w':
 960                 case 'W':
 961                         ret *= 4;
 962                         *e = *e + 1;
 963                         break;
 964                 }
 965         return (ret);
 966 }
 967
 968
 969 int
 970 main(int argc, char **argv)
 971 {
 972         int     i, ch;
 973         char    *endp;
 974         char goodfile[1024];
 975         char logfile[1024];
 976
 977         goodfile[0] = 0;
 978         logfile[0] = 0;
 979
 980         page_size = getpagesize();
 981         page_mask = page_size - 1;
 982
 983         setvbuf(stdout, NULL, _IOLBF, 0); /* line buffered stdout */
 984
 985         while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))
 986                != EOF)
 987                 switch (ch) {
 988                 case 'b':
 989                         simulatedopcount = getnum(optarg, &endp);
 990                         if (!quiet)
 991                                 fprintf(stdout, "Will begin at operation %ld\n",
 992                                         simulatedopcount);
 993                         if (simulatedopcount == 0)
 994                                 usage();
 995                         simulatedopcount -= 1;
 996                         break;
 997                 case 'c':
 998                         closeprob = getnum(optarg, &endp);
 999                         if (!quiet)
1000                                 fprintf(stdout,
1001                                         "Chance of close/open is 1 in %d\n",
1002                                         closeprob);
1003                         if (closeprob <= 0)
1004                                 usage();
1005                         break;
1006                 case 'd':
1007                         debug = 1;
1008                         break;
1009                 case 'l':
1010                         maxfilelen = getnum(optarg, &endp);
1011                         if (maxfilelen <= 0)
1012                                 usage();
1013                         break;
1014                 case 'm':
1015                         monitorstart = getnum(optarg, &endp);
1016                         if (monitorstart < 0)
1017                                 usage();
1018                         if (!endp || *endp++ != ':')
1019                                 usage();
1020                         monitorend = getnum(endp, &endp);
1021                         if (monitorend < 0)
1022                                 usage();
1023                         if (monitorend == 0)
1024                                 monitorend = -1; /* aka infinity */
1025                         debug = 1;
1026                 case 'n':
1027                         sizechecks = 0;
1028                         break;
1029                 case 'o':
1030                         maxoplen = getnum(optarg, &endp);
1031                         if (maxoplen <= 0)
1032                                 usage();
1033                         break;
1034                 case 'p':
1035                         progressinterval = getnum(optarg, &endp);
1036                         if ((int)progressinterval < 0)
1037                                 usage();
1038                         break;
1039                 case 'q':
1040                         quiet = 1;
1041                         break;
1042                 case 'r':
1043                         readbdy = getnum(optarg, &endp);
1044                         if (readbdy <= 0)
1045                                 usage();
1046                         break;
1047                 case 's':
1048                         style = getnum(optarg, &endp);
1049                         if (style < 0 || style > 1)
1050                                 usage();
1051                         break;
1052                 case 't':
1053                         truncbdy = getnum(optarg, &endp);
1054                         if (truncbdy <= 0)
1055                                 usage();
1056                         break;
1057                 case 'w':
1058                         writebdy = getnum(optarg, &endp);
1059                         if (writebdy <= 0)
1060                                 usage();
1061                         break;
1062                 case 'D':
1063                         debugstart = getnum(optarg, &endp);
1064                         if (debugstart < 1)
1065                                 usage();
1066                         break;
1067                 case 'L':
1068                         lite = 1;
1069                         break;
1070                 case 'N':
1071                         numops = getnum(optarg, &endp);
1072                         if (numops < 0)
1073                                 usage();
1074                         break;
1075                 case 'O':
1076                         randomoplen = 0;
1077                         break;
1078                 case 'P':
1079                         strncpy(goodfile, optarg, sizeof(goodfile));
1080                         strcat(goodfile, "/");
1081                         strncpy(logfile, optarg, sizeof(logfile));
1082                         strcat(logfile, "/");
1083                         break;
1084                 case 'R':
1085                         mapped_reads = 0;
1086                         break;
1087                 case 'S':
1088                         seed = getnum(optarg, &endp);
1089                         if (seed == 0)
1090                                 seed = time(0) % 10000;
1091                         if (!quiet)
1092                                 fprintf(stdout, "Seed set to %d\n", seed);
1093                         if (seed < 0)
1094                                 usage();
1095                         break;
1096                 case 'W':
1097                         mapped_writes = 0;
1098                         if (!quiet)
1099                                 fprintf(stdout, "mapped writes DISABLED\n");
1100                         break;
1101
1102                 default:
1103                         usage();
1104                         /* NOTREACHED */
1105                 }
1106         argc -= optind;
1107         argv += optind;
1108         if (argc != 1)
1109                 usage();
1110         fname = argv[0];
1111
1112         signal(SIGHUP,  cleanup);
1113         signal(SIGINT,  cleanup);
1114         signal(SIGPIPE, cleanup);
1115         signal(SIGALRM, cleanup);
1116         signal(SIGTERM, cleanup);
1117         signal(SIGXCPU, cleanup);
1118         signal(SIGXFSZ, cleanup);
1119         signal(SIGVTALRM,       cleanup);
1120         signal(SIGUSR1, cleanup);
1121         signal(SIGUSR2, cleanup);
1122         signal(SIGSEGV, segv);
1123
1124         initstate(seed, state, 256);
1125         setstate(state);
1126         fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1127         if (fd < 0) {
1128                 prterr(fname);
1129                 exit(91);
1130         }
1131         strncat(goodfile, fname, 256);
1132         strcat (goodfile, ".fsxgood");
1133         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1134         if (fsxgoodfd < 0) {
1135                 prterr(goodfile);
1136                 exit(92);
1137         }
1138         strncat(logfile, fname, 256);
1139         strcat (logfile, ".fsxlog");
1140         fsxlogf = fopen(logfile, "w");
1141         if (fsxlogf == NULL) {
1142                 prterr(logfile);
1143                 exit(93);
1144         }
1145         if (lite) {
1146                 off_t ret;
1147                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1148                 if (file_size == (off_t)-1) {
1149                         prterr(fname);
1150                         warn("main: lseek eof");
1151                         exit(94);
1152                 }
1153                 ret = lseek(fd, (off_t)0, SEEK_SET);
1154                 if (ret == (off_t)-1) {
1155                         prterr(fname);
1156                         warn("main: lseek 0");
1157                         exit(95);
1158                 }
1159         }
1160         original_buf = (char *) malloc(maxfilelen);
1161         for (i = 0; i < maxfilelen; i++)
1162                 original_buf[i] = random() % 256;
1163         good_buf = (char *) malloc(maxfilelen);
1164         memset(good_buf, '\0', maxfilelen);
1165         temp_buf = (char *) malloc(maxoplen);
1166         memset(temp_buf, '\0', maxoplen);
1167         if (lite) {     /* zero entire existing file */
1168                 ssize_t written;
1169
1170                 written = write(fd, good_buf, (size_t)maxfilelen);
1171                 if (written != maxfilelen) {
1172                         if (written == -1) {
1173                                 prterr(fname);
1174                                 warn("main: error on write");
1175                         } else
1176                                 warn("main: short write, 0x%x bytes instead of 0x%x\n",
1177                                      (unsigned)written, maxfilelen);
1178                         exit(98);
1179                 }
1180         } else
1181                 check_trunc_hack();
1182
1183         while (numops == -1 || numops--)
1184                 test();
1185
1186         if (close(fd)) {
1187                 prterr("close");
1188                 report_failure(99);
1189         }
1190         prt("All operations completed A-OK!\n");
1191
1192         exit(0);
1193         return 0;
1194 }
1195