ltp/fsx.c

   1 /*
   2  *      Copyright (C) 1991, NeXT Computer, Inc.  All Rights Reserverd.
   3  *
   4  *      File:   fsx.c
   5  *      Author: Avadis Tevanian, Jr.
   6  *
   7  *      File system exerciser.
   8  *
   9  *      Rewritten 8/98 by Conrad Minshall.
  10  *
  11  *      Small changes to work under Linux -- davej.
  12  *
  13  *      Checks for mmap last-page zero fill.
  14  */
  15
  16 #include "global.h"
  17
  18 #include <limits.h>
  19 #include <time.h>
  20 #include <strings.h>
  21 #include <sys/file.h>
  22 #include <sys/mman.h>
  23 #include <stdbool.h>
  24 #ifdef HAVE_ERR_H
  25 #include <err.h>
  26 #endif
  27 #include <signal.h>
  28 #include <stdio.h>
  29 #include <stddef.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdarg.h>
  33 #include <errno.h>
  34 #ifdef AIO
  35 #include <libaio.h>
  36 #endif
  37 #include <sys/syscall.h>
  38
  39 #ifndef MAP_FILE
  40 # define MAP_FILE 0
  41 #endif
  42
  43 #define NUMPRINTCOLUMNS 32      /* # columns of data to print on each line */
  44
  45 /* Operation flags */
  46
  47 enum opflags { FL_NONE = 0, FL_SKIPPED = 1, FL_CLOSE_OPEN = 2, FL_KEEP_SIZE = 4 };
  48
  49 /*
  50  *      A log entry is an operation and a bunch of arguments.
  51  */
  52
  53 struct log_entry {
  54         int     operation;
  55         int     nr_args;
  56         int     args[4];
  57         enum opflags flags;
  58 };
  59
  60 #define LOGSIZE 10000
  61
  62 struct log_entry        oplog[LOGSIZE]; /* the log */
  63 int                     logptr = 0;     /* current position in log */
  64 int                     logcount = 0;   /* total ops */
  65
  66 /*
  67  * The operation matrix is complex due to conditional execution of different
  68  * features. Hence when we come to deciding what operation to run, we need to
  69  * be careful in how we select the different operations. The active operations
  70  * are mapped to numbers as follows:
  71  *
  72  *                      lite    !lite   integrity
  73  * READ:                0       0       0
  74  * WRITE:               1       1       1
  75  * MAPREAD:             2       2       2
  76  * MAPWRITE:            3       3       3
  77  * TRUNCATE:            -       4       4
  78  * FALLOCATE:           -       5       5
  79  * PUNCH HOLE:          -       6       6
  80  * ZERO RANGE:          -       7       7
  81  * COLLAPSE RANGE:      -       8       8
  82  * FSYNC:               -       -       9
  83  *
  84  * When mapped read/writes are disabled, they are simply converted to normal
  85  * reads and writes. When fallocate/fpunch calls are disabled, they are
  86  * skipped.
  87  *
  88  * Because of the "lite" version, we also need to have different "maximum
  89  * operation" defines to allow the ops to be selected correctly based on the
  90  * mode being run.
  91  */
  92
  93 enum {
  94         /* common operations */
  95         OP_READ = 0,
  96         OP_WRITE,
  97         OP_MAPREAD,
  98         OP_MAPWRITE,
  99         OP_MAX_LITE,
 100
 101         /* !lite operations */
 102         OP_TRUNCATE = OP_MAX_LITE,
 103         OP_FALLOCATE,
 104         OP_PUNCH_HOLE,
 105         OP_ZERO_RANGE,
 106         OP_COLLAPSE_RANGE,
 107         OP_INSERT_RANGE,
 108         OP_CLONE_RANGE,
 109         OP_DEDUPE_RANGE,
 110         OP_COPY_RANGE,
 111         OP_MAX_FULL,
 112
 113         /* integrity operations */
 114         OP_FSYNC = OP_MAX_FULL,
 115         OP_MAX_INTEGRITY,
 116 };
 117
 118 #undef PAGE_SIZE
 119 #define PAGE_SIZE       getpagesize()
 120 #undef PAGE_MASK
 121 #define PAGE_MASK       (PAGE_SIZE - 1)
 122
 123 char    *original_buf;                  /* a pointer to the original data */
 124 char    *good_buf;                      /* a pointer to the correct data */
 125 char    *temp_buf;                      /* a pointer to the current data */
 126 char    *fname;                         /* name of our test file */
 127 char    *bname;                         /* basename of our test file */
 128 char    *logdev;                        /* -i flag */
 129 char    *logid;                         /* -j flag */
 130 char    dname[1024];                    /* -P flag */
 131 char    goodfile[PATH_MAX];
 132 int     dirpath = 0;                    /* -P flag */
 133 int     fd;                             /* fd for our test file */
 134
 135 blksize_t       block_size = 0;
 136 off_t           file_size = 0;
 137 off_t           biggest = 0;
 138 long long       testcalls = 0;          /* calls to function "test" */
 139
 140 long long       simulatedopcount = 0;   /* -b flag */
 141 int     closeprob = 0;                  /* -c flag */
 142 int     debug = 0;                      /* -d flag */
 143 long long       debugstart = 0;         /* -D flag */
 144 char    filldata = 0;                   /* -g flag */
 145 int     flush = 0;                      /* -f flag */
 146 int     do_fsync = 0;                   /* -y flag */
 147 unsigned long   maxfilelen = 256 * 1024;        /* -l flag */
 148 int     sizechecks = 1;                 /* -n flag disables them */
 149 int     maxoplen = 64 * 1024;           /* -o flag */
 150 int     quiet = 0;                      /* -q flag */
 151 long long       progressinterval = 0;   /* -p flag */
 152 int     readbdy = 1;                    /* -r flag */
 153 int     style = 0;                      /* -s flag */
 154 int     prealloc = 0;                   /* -x flag */
 155 int     truncbdy = 1;                   /* -t flag */
 156 int     writebdy = 1;                   /* -w flag */
 157 long    monitorstart = -1;              /* -m flag */
 158 long    monitorend = -1;                /* -m flag */
 159 int     lite = 0;                       /* -L flag */
 160 long long numops = -1;                  /* -N flag */
 161 int     randomoplen = 1;                /* -O flag disables it */
 162 int     seed = 1;                       /* -S flag */
 163 int     mapped_writes = 1;              /* -W flag disables */
 164 int     fallocate_calls = 1;            /* -F flag disables */
 165 int     keep_size_calls = 1;            /* -K flag disables */
 166 int     punch_hole_calls = 1;           /* -H flag disables */
 167 int     zero_range_calls = 1;           /* -z flag disables */
 168 int     collapse_range_calls = 1;       /* -C flag disables */
 169 int     insert_range_calls = 1;         /* -I flag disables */
 170 int     mapped_reads = 1;               /* -R flag disables it */
 171 int     check_file = 0;                 /* -X flag enables */
 172 int     clone_range_calls = 1;          /* -J flag disables */
 173 int     dedupe_range_calls = 1;         /* -B flag disables */
 174 int     copy_range_calls = 1;           /* -E flag disables */
 175 int     integrity = 0;                  /* -i flag */
 176 int     fsxgoodfd = 0;
 177 int     o_direct;                       /* -Z */
 178 int     aio = 0;
 179 int     mark_nr = 0;
 180
 181 int page_size;
 182 int page_mask;
 183 int mmap_mask;
 184 #ifdef AIO
 185 int aio_rw(int rw, int fd, char *buf, unsigned len, unsigned offset);
 186 #define READ 0
 187 #define WRITE 1
 188 #define fsxread(a,b,c,d)        aio_rw(READ, a,b,c,d)
 189 #define fsxwrite(a,b,c,d)       aio_rw(WRITE, a,b,c,d)
 190 #else
 191 #define fsxread(a,b,c,d)        read(a,b,c)
 192 #define fsxwrite(a,b,c,d)       write(a,b,c)
 193 #endif
 194
 195 const char *replayops = NULL;
 196 const char *recordops = NULL;
 197 FILE *  fsxlogf = NULL;
 198 FILE *  replayopsf = NULL;
 199 char opsfile[PATH_MAX];
 200 int badoff = -1;
 201 int closeopen = 0;
 202
 203 static void *round_ptr_up(void *ptr, unsigned long align, unsigned long offset)
 204 {
 205         unsigned long ret = (unsigned long)ptr;
 206
 207         ret = ((ret + align - 1) & ~(align - 1));
 208         ret += offset;
 209         return (void *)ret;
 210 }
 211
 212 void
 213 vwarnc(int code, const char *fmt, va_list ap)
 214 {
 215         if (logid)
 216                 fprintf(stderr, "%s: ", logid);
 217         fprintf(stderr, "fsx: ");
 218         if (fmt != NULL) {
 219                 vfprintf(stderr, fmt, ap);
 220                 fprintf(stderr, ": ");
 221         }
 222         fprintf(stderr, "%s\n", strerror(code));
 223 }
 224
 225 void
 226 warn(const char * fmt, ...)  {
 227         va_list ap;
 228         va_start(ap, fmt);
 229         vwarnc(errno, fmt, ap);
 230         va_end(ap);
 231 }
 232
 233 void
 234 prt(const char *fmt, ...)
 235 {
 236         va_list args;
 237
 238         if (logid)
 239                 fprintf(stdout, "%s: ", logid);
 240         va_start(args, fmt);
 241         vfprintf(stdout, fmt, args);
 242         va_end(args);
 243         if (fsxlogf) {
 244                 va_start(args, fmt);
 245                 vfprintf(fsxlogf, fmt, args);
 246                 va_end(args);
 247         }
 248 }
 249
 250 void
 251 prterr(const char *prefix)
 252 {
 253         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
 254 }
 255
 256
 257 static const char *op_names[] = {
 258         [OP_READ] = "read",
 259         [OP_WRITE] = "write",
 260         [OP_MAPREAD] = "mapread",
 261         [OP_MAPWRITE] = "mapwrite",
 262         [OP_TRUNCATE] = "truncate",
 263         [OP_FALLOCATE] = "fallocate",
 264         [OP_PUNCH_HOLE] = "punch_hole",
 265         [OP_ZERO_RANGE] = "zero_range",
 266         [OP_COLLAPSE_RANGE] = "collapse_range",
 267         [OP_INSERT_RANGE] = "insert_range",
 268         [OP_CLONE_RANGE] = "clone_range",
 269         [OP_DEDUPE_RANGE] = "dedupe_range",
 270         [OP_COPY_RANGE] = "copy_range",
 271         [OP_FSYNC] = "fsync",
 272 };
 273
 274 static const char *op_name(int operation)
 275 {
 276         if (operation >= 0 &&
 277             operation < sizeof(op_names) / sizeof(op_names[0]))
 278                 return op_names[operation];
 279         return NULL;
 280 }
 281
 282 static int op_code(const char *name)
 283 {
 284         int i;
 285
 286         for (i = 0; i < sizeof(op_names) / sizeof(op_names[0]); i++)
 287                 if (op_names[i] && strcmp(name, op_names[i]) == 0)
 288                         return i;
 289         return -1;
 290 }
 291
 292 void
 293 log5(int operation, int arg0, int arg1, int arg2, enum opflags flags)
 294 {
 295         struct log_entry *le;
 296
 297         le = &oplog[logptr];
 298         le->operation = operation;
 299         if (closeopen)
 300                 flags |= FL_CLOSE_OPEN;
 301         le->args[0] = arg0;
 302         le->args[1] = arg1;
 303         le->args[2] = arg2;
 304         le->args[3] = file_size;
 305         le->nr_args = 4;
 306         le->flags = flags;
 307         logptr++;
 308         logcount++;
 309         if (logptr >= LOGSIZE)
 310                 logptr = 0;
 311 }
 312
 313 void
 314 log4(int operation, int arg0, int arg1, enum opflags flags)
 315 {
 316         struct log_entry *le;
 317
 318         le = &oplog[logptr];
 319         le->operation = operation;
 320         if (closeopen)
 321                 flags |= FL_CLOSE_OPEN;
 322         le->args[0] = arg0;
 323         le->args[1] = arg1;
 324         le->args[2] = file_size;
 325         le->nr_args = 3;
 326         le->flags = flags;
 327         logptr++;
 328         logcount++;
 329         if (logptr >= LOGSIZE)
 330                 logptr = 0;
 331 }
 332
 333 void
 334 logdump(void)
 335 {
 336         FILE    *logopsf;
 337         int     i, count, down;
 338         struct log_entry        *lp;
 339
 340         prt("LOG DUMP (%d total operations):\n", logcount);
 341
 342         logopsf = fopen(opsfile, "w");
 343         if (!logopsf)
 344                 prterr(opsfile);
 345
 346         if (logcount < LOGSIZE) {
 347                 i = 0;
 348                 count = logcount;
 349         } else {
 350                 i = logptr;
 351                 count = LOGSIZE;
 352         }
 353         for ( ; count > 0; count--) {
 354                 bool overlap, overlap2;
 355                 int opnum;
 356
 357                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
 358                 prt("%d(%3d mod 256): ", opnum, opnum%256);
 359                 lp = &oplog[i];
 360
 361                 overlap = badoff >= lp->args[0] &&
 362                           badoff < lp->args[0] + lp->args[1];
 363
 364                 if (lp->flags & FL_SKIPPED) {
 365                         prt("SKIPPED (no operation)");
 366                         goto skipped;
 367                 }
 368
 369                 switch (lp->operation) {
 370                 case OP_MAPREAD:
 371                         prt("MAPREAD  0x%x thru 0x%x\t(0x%x bytes)",
 372                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 373                             lp->args[1]);
 374                         if (overlap)
 375                                 prt("\t***RRRR***");
 376                         break;
 377                 case OP_MAPWRITE:
 378                         prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
 379                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 380                             lp->args[1]);
 381                         if (overlap)
 382                                 prt("\t******WWWW");
 383                         break;
 384                 case OP_READ:
 385                         prt("READ     0x%x thru 0x%x\t(0x%x bytes)",
 386                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 387                             lp->args[1]);
 388                         if (overlap)
 389                                 prt("\t***RRRR***");
 390                         break;
 391                 case OP_WRITE:
 392                         prt("WRITE    0x%x thru 0x%x\t(0x%x bytes)",
 393                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 394                             lp->args[1]);
 395                         if (lp->args[0] > lp->args[2])
 396                                 prt(" HOLE");
 397                         else if (lp->args[0] + lp->args[1] > lp->args[2])
 398                                 prt(" EXTEND");
 399                         overlap = (badoff >= lp->args[0] ||
 400                                    badoff >=lp->args[2]) &&
 401                                   badoff < lp->args[0] + lp->args[1];
 402                         if (overlap)
 403                                 prt("\t***WWWW");
 404                         break;
 405                 case OP_TRUNCATE:
 406                         down = lp->args[1] < lp->args[2];
 407                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
 408                             down ? "DOWN" : "UP", lp->args[2], lp->args[1]);
 409                         overlap = badoff >= lp->args[1 + !down] &&
 410                                   badoff < lp->args[1 + !!down];
 411                         if (overlap)
 412                                 prt("\t******WWWW");
 413                         break;
 414                 case OP_FALLOCATE:
 415                         /* 0: offset 1: length 2: where alloced */
 416                         prt("FALLOC   0x%x thru 0x%x\t(0x%x bytes) ",
 417                                 lp->args[0], lp->args[0] + lp->args[1],
 418                                 lp->args[1]);
 419                         if (lp->args[0] + lp->args[1] <= lp->args[2])
 420                                 prt("INTERIOR");
 421                         else if (lp->flags & FL_KEEP_SIZE)
 422                                 prt("PAST_EOF");
 423                         else
 424                                 prt("EXTENDING");
 425                         if (overlap)
 426                                 prt("\t******FFFF");
 427                         break;
 428                 case OP_PUNCH_HOLE:
 429                         prt("PUNCH    0x%x thru 0x%x\t(0x%x bytes)",
 430                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 431                             lp->args[1]);
 432                         if (overlap)
 433                                 prt("\t******PPPP");
 434                         break;
 435                 case OP_ZERO_RANGE:
 436                         prt("ZERO     0x%x thru 0x%x\t(0x%x bytes)",
 437                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 438                             lp->args[1]);
 439                         if (overlap)
 440                                 prt("\t******ZZZZ");
 441                         break;
 442                 case OP_COLLAPSE_RANGE:
 443                         prt("COLLAPSE 0x%x thru 0x%x\t(0x%x bytes)",
 444                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 445                             lp->args[1]);
 446                         if (overlap)
 447                                 prt("\t******CCCC");
 448                         break;
 449                 case OP_INSERT_RANGE:
 450                         prt("INSERT 0x%x thru 0x%x\t(0x%x bytes)",
 451                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 452                             lp->args[1]);
 453                         if (overlap)
 454                                 prt("\t******IIII");
 455                         break;
 456                 case OP_CLONE_RANGE:
 457                         prt("CLONE 0x%x thru 0x%x\t(0x%x bytes) to 0x%x thru 0x%x",
 458                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 459                             lp->args[1],
 460                             lp->args[2], lp->args[2] + lp->args[1] - 1);
 461                         overlap2 = badoff >= lp->args[2] &&
 462                                   badoff < lp->args[2] + lp->args[1];
 463                         if (overlap && overlap2)
 464                                 prt("\tJJJJ**JJJJ");
 465                         else if (overlap)
 466                                 prt("\tJJJJ******");
 467                         else if (overlap2)
 468                                 prt("\t******JJJJ");
 469                         break;
 470                 case OP_DEDUPE_RANGE:
 471                         prt("DEDUPE 0x%x thru 0x%x\t(0x%x bytes) to 0x%x thru 0x%x",
 472                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 473                             lp->args[1],
 474                             lp->args[2], lp->args[2] + lp->args[1] - 1);
 475                         overlap2 = badoff >= lp->args[2] &&
 476                                   badoff < lp->args[2] + lp->args[1];
 477                         if (overlap && overlap2)
 478                                 prt("\tBBBB**BBBB");
 479                         else if (overlap)
 480                                 prt("\tBBBB******");
 481                         else if (overlap2)
 482                                 prt("\t******BBBB");
 483                         break;
 484                 case OP_COPY_RANGE:
 485                         prt("COPY 0x%x thru 0x%x\t(0x%x bytes) to 0x%x thru 0x%x",
 486                             lp->args[0], lp->args[0] + lp->args[1] - 1,
 487                             lp->args[1],
 488                             lp->args[2], lp->args[2] + lp->args[1] - 1);
 489                         overlap2 = badoff >= lp->args[2] &&
 490                                   badoff < lp->args[2] + lp->args[1];
 491                         if (overlap && overlap2)
 492                                 prt("\tEEEE**EEEE");
 493                         else if (overlap)
 494                                 prt("\tEEEE******");
 495                         else if (overlap2)
 496                                 prt("\t******EEEE");
 497                         break;
 498                 case OP_FSYNC:
 499                         prt("FSYNC");
 500                         break;
 501                 default:
 502                         prt("BOGUS LOG ENTRY (operation code = %d)!",
 503                             lp->operation);
 504                         continue;
 505                 }
 506
 507             skipped:
 508                 if (lp->flags & FL_CLOSE_OPEN)
 509                         prt("\n\t\tCLOSE/OPEN");
 510                 prt("\n");
 511                 i++;
 512                 if (i == LOGSIZE)
 513                         i = 0;
 514
 515                 if (logopsf) {
 516                         int j;
 517
 518                         if (lp->flags & FL_SKIPPED)
 519                                 fprintf(logopsf, "skip ");
 520                         fprintf(logopsf, "%s", op_name(lp->operation));
 521                         for (j = 0; j < lp->nr_args; j++)
 522                                 fprintf(logopsf, " 0x%x", lp->args[j]);
 523                         if (lp->flags & FL_KEEP_SIZE)
 524                                 fprintf(logopsf, " keep_size");
 525                         if (lp->flags & FL_CLOSE_OPEN)
 526                                 fprintf(logopsf, " close_open");
 527                         if (overlap)
 528                                 fprintf(logopsf, " *");
 529                         fprintf(logopsf, "\n");
 530                 }
 531         }
 532
 533         if (logopsf) {
 534                 if (fclose(logopsf) != 0)
 535                         prterr(opsfile);
 536                 else
 537                         prt("Log of operations saved to \"%s\"; "
 538                             "replay with --replay-ops\n",
 539                             opsfile);
 540         }
 541 }
 542
 543
 544 void
 545 save_buffer(char *buffer, off_t bufferlength, int fd)
 546 {
 547         off_t ret;
 548         ssize_t byteswritten;
 549
 550         if (fd <= 0 || bufferlength == 0)
 551                 return;
 552
 553         if (bufferlength > SSIZE_MAX) {
 554                 prt("fsx flaw: overflow in save_buffer\n");
 555                 exit(67);
 556         }
 557         if (lite) {
 558                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 559                 if (size_by_seek == (off_t)-1)
 560                         prterr("save_buffer: lseek eof");
 561                 else if (bufferlength > size_by_seek) {
 562                         warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
 563                              (unsigned long long)bufferlength);
 564                         bufferlength = size_by_seek;
 565                 }
 566         }
 567
 568         ret = lseek(fd, (off_t)0, SEEK_SET);
 569         if (ret == (off_t)-1)
 570                 prterr("save_buffer: lseek 0");
 571
 572         byteswritten = write(fd, buffer, (size_t)bufferlength);
 573         if (byteswritten != bufferlength) {
 574                 if (byteswritten == -1)
 575                         prterr("save_buffer write");
 576                 else
 577                         warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",
 578                              (unsigned)byteswritten,
 579                              (unsigned long long)bufferlength);
 580         }
 581 }
 582
 583
 584 void
 585 report_failure(int status)
 586 {
 587         logdump();
 588
 589         if (fsxgoodfd) {
 590                 if (good_buf) {
 591                         save_buffer(good_buf, file_size, fsxgoodfd);
 592                         prt("Correct content saved for comparison\n");
 593                         prt("(maybe hexdump \"%s\" vs \"%s\")\n",
 594                             fname, goodfile);
 595                 }
 596                 close(fsxgoodfd);
 597         }
 598         exit(status);
 599 }
 600
 601
 602 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
 603                                         *(((unsigned char *)(cp)) + 1)))
 604
 605 void
 606 mark_log(void)
 607 {
 608         char command[256];
 609         int ret;
 610
 611         snprintf(command, 256, "dmsetup message %s 0 mark %s.mark%d", logdev,
 612                  bname, mark_nr);
 613         ret = system(command);
 614         if (ret) {
 615                 prterr("dmsetup mark failed");
 616                 exit(211);
 617         }
 618 }
 619
 620 void
 621 dump_fsync_buffer(void)
 622 {
 623         char fname_buffer[PATH_MAX];
 624         int good_fd;
 625
 626         if (!good_buf)
 627                 return;
 628
 629         snprintf(fname_buffer, sizeof(fname_buffer), "%s%s.mark%d", dname,
 630                  bname, mark_nr);
 631         good_fd = open(fname_buffer, O_WRONLY|O_CREAT|O_TRUNC, 0666);
 632         if (good_fd < 0) {
 633                 prterr(fname_buffer);
 634                 exit(212);
 635         }
 636
 637         save_buffer(good_buf, file_size, good_fd);
 638         close(good_fd);
 639         prt("Dumped fsync buffer to %s\n", fname_buffer + dirpath);
 640 }
 641
 642 void
 643 check_buffers(char *buf, unsigned offset, unsigned size)
 644 {
 645         unsigned char c, t;
 646         unsigned i = 0;
 647         unsigned n = 0;
 648         unsigned op = 0;
 649         unsigned bad = 0;
 650
 651         if (memcmp(good_buf + offset, buf, size) != 0) {
 652                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x, fname = %s\n",
 653                     offset, size, fname);
 654                 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
 655                 while (size > 0) {
 656                         c = good_buf[offset];
 657                         t = buf[i];
 658                         if (c != t) {
 659                                 if (n < 16) {
 660                                         bad = short_at(&buf[i]);
 661                                         prt("0x%05x\t0x%04x\t0x%04x", offset,
 662                                             short_at(&good_buf[offset]), bad);
 663                                         op = buf[offset & 1 ? i+1 : i];
 664                                         prt("\t0x%05x\n", n);
 665                                         if (op)
 666                                                 prt("operation# (mod 256) for "
 667                                                   "the bad data may be %u\n",
 668                                                 ((unsigned)op & 0xff));
 669                                         else
 670                                                 prt("operation# (mod 256) for "
 671                                                   "the bad data unknown, check"
 672                                                   " HOLE and EXTEND ops\n");
 673                                 }
 674                                 n++;
 675                                 badoff = offset;
 676                         }
 677                         offset++;
 678                         i++;
 679                         size--;
 680                 }
 681                 report_failure(110);
 682         }
 683 }
 684
 685
 686 void
 687 check_size(void)
 688 {
 689         struct stat     statbuf;
 690         off_t   size_by_seek;
 691
 692         if (fstat(fd, &statbuf)) {
 693                 prterr("check_size: fstat");
 694                 statbuf.st_size = -1;
 695         }
 696         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
 697         if (file_size != statbuf.st_size || file_size != size_by_seek) {
 698                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
 699                     (unsigned long long)file_size,
 700                     (unsigned long long)statbuf.st_size,
 701                     (unsigned long long)size_by_seek);
 702                 report_failure(120);
 703         }
 704 }
 705
 706
 707 void
 708 check_trunc_hack(void)
 709 {
 710         struct stat statbuf;
 711         off_t offset = file_size + (off_t)100000;
 712
 713         if (ftruncate(fd, file_size))
 714                 goto ftruncate_err;
 715         if (ftruncate(fd, offset))
 716                 goto ftruncate_err;
 717         fstat(fd, &statbuf);
 718         if (statbuf.st_size != offset) {
 719                 prt("no extend on truncate! not posix!\n");
 720                 exit(130);
 721         }
 722         if (ftruncate(fd, file_size)) {
 723 ftruncate_err:
 724                 prterr("check_trunc_hack: ftruncate");
 725                 exit(131);
 726         }
 727 }
 728
 729 void
 730 doflush(unsigned offset, unsigned size)
 731 {
 732         unsigned pg_offset;
 733         unsigned map_size;
 734         char    *p;
 735
 736         if (o_direct == O_DIRECT)
 737                 return;
 738
 739         pg_offset = offset & mmap_mask;
 740         map_size  = pg_offset + size;
 741
 742         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
 743                               MAP_FILE | MAP_SHARED, fd,
 744                               (off_t)(offset - pg_offset))) == (char *)-1) {
 745                 prterr("doflush: mmap");
 746                 report_failure(202);
 747         }
 748         if (msync(p, map_size, MS_INVALIDATE) != 0) {
 749                 prterr("doflush: msync");
 750                 report_failure(203);
 751         }
 752         if (munmap(p, map_size) != 0) {
 753                 prterr("doflush: munmap");
 754                 report_failure(204);
 755         }
 756 }
 757
 758 void
 759 doread(unsigned offset, unsigned size)
 760 {
 761         off_t ret;
 762         unsigned iret;
 763
 764         offset -= offset % readbdy;
 765         if (o_direct)
 766                 size -= size % readbdy;
 767         if (size == 0) {
 768                 if (!quiet && testcalls > simulatedopcount && !o_direct)
 769                         prt("skipping zero size read\n");
 770                 log4(OP_READ, offset, size, FL_SKIPPED);
 771                 return;
 772         }
 773         if (size + offset > file_size) {
 774                 if (!quiet && testcalls > simulatedopcount)
 775                         prt("skipping seek/read past end of file\n");
 776                 log4(OP_READ, offset, size, FL_SKIPPED);
 777                 return;
 778         }
 779
 780         log4(OP_READ, offset, size, FL_NONE);
 781
 782         if (testcalls <= simulatedopcount)
 783                 return;
 784
 785         if (!quiet &&
 786                 ((progressinterval && testcalls % progressinterval == 0)  ||
 787                 (debug &&
 788                        (monitorstart == -1 ||
 789                         (offset + size > monitorstart &&
 790                         (monitorend == -1 || offset <= monitorend))))))
 791                 prt("%lld read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 792                     offset, offset + size - 1, size);
 793         ret = lseek(fd, (off_t)offset, SEEK_SET);
 794         if (ret == (off_t)-1) {
 795                 prterr("doread: lseek");
 796                 report_failure(140);
 797         }
 798         iret = fsxread(fd, temp_buf, size, offset);
 799         if (iret != size) {
 800                 if (iret == -1)
 801                         prterr("doread: read");
 802                 else
 803                         prt("short read: 0x%x bytes instead of 0x%x\n",
 804                             iret, size);
 805                 report_failure(141);
 806         }
 807         check_buffers(temp_buf, offset, size);
 808 }
 809
 810 void
 811 check_eofpage(char *s, unsigned offset, char *p, int size)
 812 {
 813         unsigned long last_page, should_be_zero;
 814
 815         if (offset + size <= (file_size & ~page_mask))
 816                 return;
 817         /*
 818          * we landed in the last page of the file
 819          * test to make sure the VM system provided 0's
 820          * beyond the true end of the file mapping
 821          * (as required by mmap def in 1996 posix 1003.1)
 822          */
 823         last_page = ((unsigned long)p + (offset & page_mask) + size) & ~page_mask;
 824
 825         for (should_be_zero = last_page + (file_size & page_mask);
 826              should_be_zero < last_page + page_size;
 827              should_be_zero++)
 828                 if (*(char *)should_be_zero) {
 829                         prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
 830                             s, file_size - 1, should_be_zero & page_mask,
 831                             short_at(should_be_zero));
 832                         report_failure(205);
 833                 }
 834 }
 835
 836 void
 837 check_contents(void)
 838 {
 839         static char *check_buf;
 840         unsigned offset = 0;
 841         unsigned size = file_size;
 842         unsigned map_offset;
 843         unsigned map_size;
 844         char *p;
 845         off_t ret;
 846         unsigned iret;
 847
 848         if (!check_buf) {
 849                 check_buf = (char *) malloc(maxfilelen + writebdy);
 850                 assert(check_buf != NULL);
 851                 check_buf = round_ptr_up(check_buf, writebdy, 0);
 852                 memset(check_buf, '\0', maxfilelen);
 853         }
 854
 855         if (o_direct)
 856                 size -= size % readbdy;
 857         if (size == 0)
 858                 return;
 859
 860         ret = lseek(fd, (off_t)offset, SEEK_SET);
 861         if (ret == (off_t)-1) {
 862                 prterr("doread: lseek");
 863                 report_failure(140);
 864         }
 865
 866         iret = fsxread(fd, check_buf, size, offset);
 867         if (iret != size) {
 868                 if (iret == -1)
 869                         prterr("check_contents: read");
 870                 else
 871                         prt("short check read: 0x%x bytes instead of 0x%x\n",
 872                             iret, size);
 873                 report_failure(141);
 874         }
 875         check_buffers(check_buf, offset, size);
 876
 877         /* Map eof page, check it */
 878         map_offset = size - (size & PAGE_MASK);
 879         if (map_offset == size)
 880                 map_offset -= PAGE_SIZE;
 881         map_size  = size - map_offset;
 882
 883         p = mmap(0, map_size, PROT_READ, MAP_SHARED, fd, map_offset);
 884         if (p == MAP_FAILED) {
 885                 prterr("check_contents: mmap");
 886                 report_failure(190);
 887         }
 888         check_eofpage("check_contents", map_offset, p, map_size);
 889
 890         if (munmap(p, map_size) != 0) {
 891                 prterr("check_contents: munmap");
 892                 report_failure(191);
 893         }
 894 }
 895
 896 void
 897 domapread(unsigned offset, unsigned size)
 898 {
 899         unsigned pg_offset;
 900         unsigned map_size;
 901         char    *p;
 902
 903         offset -= offset % readbdy;
 904         if (size == 0) {
 905                 if (!quiet && testcalls > simulatedopcount)
 906                         prt("skipping zero size read\n");
 907                 log4(OP_MAPREAD, offset, size, FL_SKIPPED);
 908                 return;
 909         }
 910         if (size + offset > file_size) {
 911                 if (!quiet && testcalls > simulatedopcount)
 912                         prt("skipping seek/read past end of file\n");
 913                 log4(OP_MAPREAD, offset, size, FL_SKIPPED);
 914                 return;
 915         }
 916
 917         log4(OP_MAPREAD, offset, size, FL_NONE);
 918
 919         if (testcalls <= simulatedopcount)
 920                 return;
 921
 922         if (!quiet &&
 923                 ((progressinterval && testcalls % progressinterval == 0) ||
 924                        (debug &&
 925                        (monitorstart == -1 ||
 926                         (offset + size > monitorstart &&
 927                         (monitorend == -1 || offset <= monitorend))))))
 928                 prt("%lld mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
 929                     offset, offset + size - 1, size);
 930
 931         pg_offset = offset & PAGE_MASK;
 932         map_size  = pg_offset + size;
 933
 934         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_SHARED, fd,
 935                               (off_t)(offset - pg_offset))) == (char *)-1) {
 936                 prterr("domapread: mmap");
 937                 report_failure(190);
 938         }
 939         memcpy(temp_buf, p + pg_offset, size);
 940
 941         check_eofpage("Read", offset, p, size);
 942
 943         if (munmap(p, map_size) != 0) {
 944                 prterr("domapread: munmap");
 945                 report_failure(191);
 946         }
 947
 948         check_buffers(temp_buf, offset, size);
 949 }
 950
 951
 952 void
 953 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
 954 {
 955         while (size--) {
 956                 if (filldata) {
 957                         good_buf[offset] = filldata;
 958                 } else {
 959                         good_buf[offset] = testcalls % 256;
 960                         if (offset % 2)
 961                                 good_buf[offset] += original_buf[offset];
 962                 }
 963                 offset++;
 964         }
 965 }
 966
 967
 968 void
 969 dowrite(unsigned offset, unsigned size)
 970 {
 971         off_t ret;
 972         unsigned iret;
 973
 974         offset -= offset % writebdy;
 975         if (o_direct)
 976                 size -= size % writebdy;
 977         if (size == 0) {
 978                 if (!quiet && testcalls > simulatedopcount && !o_direct)
 979                         prt("skipping zero size write\n");
 980                 log4(OP_WRITE, offset, size, FL_SKIPPED);
 981                 return;
 982         }
 983
 984         log4(OP_WRITE, offset, size, FL_NONE);
 985
 986         gendata(original_buf, good_buf, offset, size);
 987         if (file_size < offset + size) {
 988                 if (file_size < offset)
 989                         memset(good_buf + file_size, '\0', offset - file_size);
 990                 file_size = offset + size;
 991                 if (lite) {
 992                         warn("Lite file size bug in fsx!");
 993                         report_failure(149);
 994                 }
 995         }
 996
 997         if (testcalls <= simulatedopcount)
 998                 return;
 999
1000         if (!quiet &&
1001                 ((progressinterval && testcalls % progressinterval == 0) ||
1002                        (debug &&
1003                        (monitorstart == -1 ||
1004                         (offset + size > monitorstart &&
1005                         (monitorend == -1 || offset <= monitorend))))))
1006                 prt("%lld write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
1007                     offset, offset + size - 1, size);
1008         ret = lseek(fd, (off_t)offset, SEEK_SET);
1009         if (ret == (off_t)-1) {
1010                 prterr("dowrite: lseek");
1011                 report_failure(150);
1012         }
1013         iret = fsxwrite(fd, good_buf + offset, size, offset);
1014         if (iret != size) {
1015                 if (iret == -1)
1016                         prterr("dowrite: write");
1017                 else
1018                         prt("short write: 0x%x bytes instead of 0x%x\n",
1019                             iret, size);
1020                 report_failure(151);
1021         }
1022         if (do_fsync) {
1023                 if (fsync(fd)) {
1024                         prt("fsync() failed: %s\n", strerror(errno));
1025                         report_failure(152);
1026                 }
1027         }
1028         if (flush) {
1029                 doflush(offset, size);
1030         }
1031 }
1032
1033
1034 void
1035 domapwrite(unsigned offset, unsigned size)
1036 {
1037         unsigned pg_offset;
1038         unsigned map_size;
1039         off_t    cur_filesize;
1040         char    *p;
1041
1042         offset -= offset % writebdy;
1043         if (size == 0) {
1044                 if (!quiet && testcalls > simulatedopcount)
1045                         prt("skipping zero size write\n");
1046                 log4(OP_MAPWRITE, offset, size, FL_SKIPPED);
1047                 return;
1048         }
1049         cur_filesize = file_size;
1050
1051         log4(OP_MAPWRITE, offset, size, FL_NONE);
1052
1053         gendata(original_buf, good_buf, offset, size);
1054         if (file_size < offset + size) {
1055                 if (file_size < offset)
1056                         memset(good_buf + file_size, '\0', offset - file_size);
1057                 file_size = offset + size;
1058                 if (lite) {
1059                         warn("Lite file size bug in fsx!");
1060                         report_failure(200);
1061                 }
1062         }
1063
1064         if (testcalls <= simulatedopcount)
1065                 return;
1066
1067         if (!quiet &&
1068                 ((progressinterval && testcalls % progressinterval == 0) ||
1069                        (debug &&
1070                        (monitorstart == -1 ||
1071                         (offset + size > monitorstart &&
1072                         (monitorend == -1 || offset <= monitorend))))))
1073                 prt("%lld mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
1074                     offset, offset + size - 1, size);
1075
1076         if (file_size > cur_filesize) {
1077                 if (ftruncate(fd, file_size) == -1) {
1078                         prterr("domapwrite: ftruncate");
1079                         exit(201);
1080                 }
1081         }
1082         pg_offset = offset & PAGE_MASK;
1083         map_size  = pg_offset + size;
1084
1085         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
1086                               MAP_FILE | MAP_SHARED, fd,
1087                               (off_t)(offset - pg_offset))) == (char *)-1) {
1088                 prterr("domapwrite: mmap");
1089                 report_failure(202);
1090         }
1091         memcpy(p + pg_offset, good_buf + offset, size);
1092         if (msync(p, map_size, MS_SYNC) != 0) {
1093                 prterr("domapwrite: msync");
1094                 report_failure(203);
1095         }
1096
1097         check_eofpage("Write", offset, p, size);
1098
1099         if (munmap(p, map_size) != 0) {
1100                 prterr("domapwrite: munmap");
1101                 report_failure(204);
1102         }
1103 }
1104
1105
1106 void
1107 dotruncate(unsigned size)
1108 {
1109         int oldsize = file_size;
1110
1111         size -= size % truncbdy;
1112         if (size > biggest) {
1113                 biggest = size;
1114                 if (!quiet && testcalls > simulatedopcount)
1115                         prt("truncating to largest ever: 0x%x\n", size);
1116         }
1117
1118         log4(OP_TRUNCATE, 0, size, FL_NONE);
1119
1120         if (size > file_size)
1121                 memset(good_buf + file_size, '\0', size - file_size);
1122         file_size = size;
1123
1124         if (testcalls <= simulatedopcount)
1125                 return;
1126
1127         if ((progressinterval && testcalls % progressinterval == 0) ||
1128             (debug && (monitorstart == -1 || monitorend == -1 ||
1129                       size <= monitorend)))
1130                 prt("%lld trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize,
1131                                 size);
1132         if (ftruncate(fd, (off_t)size) == -1) {
1133                 prt("ftruncate1: %x\n", size);
1134                 prterr("dotruncate: ftruncate");
1135                 report_failure(160);
1136         }
1137 }
1138
1139 #ifdef FALLOC_FL_PUNCH_HOLE
1140 void
1141 do_punch_hole(unsigned offset, unsigned length)
1142 {
1143         unsigned end_offset;
1144         int max_offset = 0;
1145         int max_len = 0;
1146         int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE;
1147
1148         if (length == 0) {
1149                 if (!quiet && testcalls > simulatedopcount)
1150                         prt("skipping zero length punch hole\n");
1151                 log4(OP_PUNCH_HOLE, offset, length, FL_SKIPPED);
1152                 return;
1153         }
1154
1155         if (file_size <= (loff_t)offset) {
1156                 if (!quiet && testcalls > simulatedopcount)
1157                         prt("skipping hole punch off the end of the file\n");
1158                 log4(OP_PUNCH_HOLE, offset, length, FL_SKIPPED);
1159                 return;
1160         }
1161
1162         end_offset = offset + length;
1163
1164         log4(OP_PUNCH_HOLE, offset, length, FL_NONE);
1165
1166         if (testcalls <= simulatedopcount)
1167                 return;
1168
1169         if ((progressinterval && testcalls % progressinterval == 0) ||
1170             (debug && (monitorstart == -1 || monitorend == -1 ||
1171                       end_offset <= monitorend))) {
1172                 prt("%lld punch\tfrom 0x%x to 0x%x, (0x%x bytes)\n", testcalls,
1173                         offset, offset+length, length);
1174         }
1175         if (fallocate(fd, mode, (loff_t)offset, (loff_t)length) == -1) {
1176                 prt("punch hole: 0x%x to 0x%x\n", offset, offset + length);
1177                 prterr("do_punch_hole: fallocate");
1178                 report_failure(161);
1179         }
1180
1181
1182         max_offset = offset < file_size ? offset : file_size;
1183         max_len = max_offset + length <= file_size ? length :
1184                         file_size - max_offset;
1185         memset(good_buf + max_offset, '\0', max_len);
1186 }
1187
1188 #else
1189 void
1190 do_punch_hole(unsigned offset, unsigned length)
1191 {
1192         return;
1193 }
1194 #endif
1195
1196 #ifdef FALLOC_FL_ZERO_RANGE
1197 void
1198 do_zero_range(unsigned offset, unsigned length, int keep_size)
1199 {
1200         unsigned end_offset;
1201         int mode = FALLOC_FL_ZERO_RANGE;
1202
1203         if (keep_size)
1204                 mode |= FALLOC_FL_KEEP_SIZE;
1205
1206         if (length == 0) {
1207                 if (!quiet && testcalls > simulatedopcount)
1208                         prt("skipping zero length zero range\n");
1209                 log4(OP_ZERO_RANGE, offset, length, FL_SKIPPED |
1210                      (keep_size ? FL_KEEP_SIZE : FL_NONE));
1211                 return;
1212         }
1213
1214         end_offset = keep_size ? 0 : offset + length;
1215
1216         if (end_offset > biggest) {
1217                 biggest = end_offset;
1218                 if (!quiet && testcalls > simulatedopcount)
1219                         prt("zero_range to largest ever: 0x%x\n", end_offset);
1220         }
1221
1222         /*
1223          * last arg matches fallocate string array index in logdump:
1224          *      0: allocate past EOF
1225          *      1: extending prealloc
1226          *      2: interior prealloc
1227          */
1228         log4(OP_ZERO_RANGE, offset, length,
1229              keep_size ? FL_KEEP_SIZE : FL_NONE);
1230
1231         if (testcalls <= simulatedopcount)
1232                 return;
1233
1234         if ((progressinterval && testcalls % progressinterval == 0) ||
1235             (debug && (monitorstart == -1 || monitorend == -1 ||
1236                       end_offset <= monitorend))) {
1237                 prt("%lld zero\tfrom 0x%x to 0x%x, (0x%x bytes)\n", testcalls,
1238                         offset, offset+length, length);
1239         }
1240         if (fallocate(fd, mode, (loff_t)offset, (loff_t)length) == -1) {
1241                 prt("zero range: 0x%x to 0x%x\n", offset, offset + length);
1242                 prterr("do_zero_range: fallocate");
1243                 report_failure(161);
1244         }
1245
1246         memset(good_buf + offset, '\0', length);
1247
1248         if (!keep_size && end_offset > file_size) {
1249                 /*
1250                  * If there's a gap between the old file size and the offset of
1251                  * the zero range operation, fill the gap with zeroes.
1252                  */
1253                 if (offset > file_size)
1254                         memset(good_buf + file_size, '\0', offset - file_size);
1255
1256                 file_size = end_offset;
1257         }
1258 }
1259
1260 #else
1261 void
1262 do_zero_range(unsigned offset, unsigned length, int keep_size)
1263 {
1264         return;
1265 }
1266 #endif
1267
1268 #ifdef FALLOC_FL_COLLAPSE_RANGE
1269 void
1270 do_collapse_range(unsigned offset, unsigned length)
1271 {
1272         unsigned end_offset;
1273         int mode = FALLOC_FL_COLLAPSE_RANGE;
1274
1275         if (length == 0) {
1276                 if (!quiet && testcalls > simulatedopcount)
1277                         prt("skipping zero length collapse range\n");
1278                 log4(OP_COLLAPSE_RANGE, offset, length, FL_SKIPPED);
1279                 return;
1280         }
1281
1282         end_offset = offset + length;
1283         if ((loff_t)end_offset >= file_size) {
1284                 if (!quiet && testcalls > simulatedopcount)
1285                         prt("skipping collapse range behind EOF\n");
1286                 log4(OP_COLLAPSE_RANGE, offset, length, FL_SKIPPED);
1287                 return;
1288         }
1289
1290         log4(OP_COLLAPSE_RANGE, offset, length, FL_NONE);
1291
1292         if (testcalls <= simulatedopcount)
1293                 return;
1294
1295         if ((progressinterval && testcalls % progressinterval == 0) ||
1296             (debug && (monitorstart == -1 || monitorend == -1 ||
1297                       end_offset <= monitorend))) {
1298                 prt("%lld collapse\tfrom 0x%x to 0x%x, (0x%x bytes)\n",
1299                                 testcalls, offset, offset+length, length);
1300         }
1301         if (fallocate(fd, mode, (loff_t)offset, (loff_t)length) == -1) {
1302                 prt("collapse range: 0x%x to 0x%x\n", offset, offset + length);
1303                 prterr("do_collapse_range: fallocate");
1304                 report_failure(161);
1305         }
1306
1307         memmove(good_buf + offset, good_buf + end_offset,
1308                 file_size - end_offset);
1309         file_size -= length;
1310 }
1311
1312 #else
1313 void
1314 do_collapse_range(unsigned offset, unsigned length)
1315 {
1316         return;
1317 }
1318 #endif
1319
1320 #ifdef FALLOC_FL_INSERT_RANGE
1321 void
1322 do_insert_range(unsigned offset, unsigned length)
1323 {
1324         unsigned end_offset;
1325         int mode = FALLOC_FL_INSERT_RANGE;
1326
1327         if (length == 0) {
1328                 if (!quiet && testcalls > simulatedopcount)
1329                         prt("skipping zero length insert range\n");
1330                 log4(OP_INSERT_RANGE, offset, length, FL_SKIPPED);
1331                 return;
1332         }
1333
1334         if ((loff_t)offset >= file_size) {
1335                 if (!quiet && testcalls > simulatedopcount)
1336                         prt("skipping insert range behind EOF\n");
1337                 log4(OP_INSERT_RANGE, offset, length, FL_SKIPPED);
1338                 return;
1339         }
1340
1341         log4(OP_INSERT_RANGE, offset, length, FL_NONE);
1342
1343         if (testcalls <= simulatedopcount)
1344                 return;
1345
1346         end_offset = offset + length;
1347         if ((progressinterval && testcalls % progressinterval == 0) ||
1348             (debug && (monitorstart == -1 || monitorend == -1 ||
1349                       end_offset <= monitorend))) {
1350                 prt("%lld insert\tfrom 0x%x to 0x%x, (0x%x bytes)\n", testcalls,
1351                         offset, offset+length, length);
1352         }
1353         if (fallocate(fd, mode, (loff_t)offset, (loff_t)length) == -1) {
1354                 prt("insert range: 0x%x to 0x%x\n", offset, offset + length);
1355                 prterr("do_insert_range: fallocate");
1356                 report_failure(161);
1357         }
1358
1359         memmove(good_buf + end_offset, good_buf + offset,
1360                 file_size - offset);
1361         memset(good_buf + offset, '\0', length);
1362         file_size += length;
1363 }
1364
1365 #else
1366 void
1367 do_insert_range(unsigned offset, unsigned length)
1368 {
1369         return;
1370 }
1371 #endif
1372
1373 #ifdef FICLONERANGE
1374 int
1375 test_clone_range(void)
1376 {
1377         struct file_clone_range fcr = {
1378                 .src_fd = fd,
1379         };
1380
1381         if (ioctl(fd, FICLONERANGE, &fcr) &&
1382             (errno == EOPNOTSUPP || errno == ENOTTY)) {
1383                 if (!quiet)
1384                         fprintf(stderr,
1385                                 "main: filesystem does not support "
1386                                 "clone range, disabling!\n");
1387                 return 0;
1388         }
1389
1390         return 1;
1391 }
1392
1393 void
1394 do_clone_range(unsigned offset, unsigned length, unsigned dest)
1395 {
1396         struct file_clone_range fcr = {
1397                 .src_fd = fd,
1398                 .src_offset = offset,
1399                 .src_length = length,
1400                 .dest_offset = dest,
1401         };
1402
1403         if (length == 0) {
1404                 if (!quiet && testcalls > simulatedopcount)
1405                         prt("skipping zero length clone range\n");
1406                 log5(OP_CLONE_RANGE, offset, length, dest, FL_SKIPPED);
1407                 return;
1408         }
1409
1410         if ((loff_t)offset >= file_size) {
1411                 if (!quiet && testcalls > simulatedopcount)
1412                         prt("skipping clone range behind EOF\n");
1413                 log5(OP_CLONE_RANGE, offset, length, dest, FL_SKIPPED);
1414                 return;
1415         }
1416
1417         if (dest + length > biggest) {
1418                 biggest = dest + length;
1419                 if (!quiet && testcalls > simulatedopcount)
1420                         prt("cloning to largest ever: 0x%x\n", dest + length);
1421         }
1422
1423         log5(OP_CLONE_RANGE, offset, length, dest, FL_NONE);
1424
1425         if (testcalls <= simulatedopcount)
1426                 return;
1427
1428         if ((progressinterval && testcalls % progressinterval == 0) ||
1429             (debug && (monitorstart == -1 || monitorend == -1 ||
1430                        dest <= monitorstart || dest + length <= monitorend))) {
1431                 prt("%lu clone\tfrom 0x%x to 0x%x, (0x%x bytes) at 0x%x\n",
1432                         testcalls, offset, offset+length, length, dest);
1433         }
1434
1435         if (ioctl(fd, FICLONERANGE, &fcr) == -1) {
1436                 prt("clone range: 0x%x to 0x%x at 0x%x\n", offset,
1437                                 offset + length, dest);
1438                 prterr("do_clone_range: FICLONERANGE");
1439                 report_failure(161);
1440         }
1441
1442         memcpy(good_buf + dest, good_buf + offset, length);
1443         if (dest > file_size)
1444                 memset(good_buf + file_size, '\0', dest - file_size);
1445         if (dest + length > file_size)
1446                 file_size = dest + length;
1447 }
1448
1449 #else
1450 int
1451 test_clone_range(void)
1452 {
1453         return 0;
1454 }
1455
1456 void
1457 do_clone_range(unsigned offset, unsigned length, unsigned dest)
1458 {
1459         return;
1460 }
1461 #endif
1462
1463 #ifdef FIDEDUPERANGE
1464 int
1465 test_dedupe_range(void)
1466 {
1467         struct file_dedupe_range *fdr;
1468         off_t new_len;
1469         int error;
1470         int ret = 1;
1471
1472         /* Alloc memory */
1473         fdr = calloc(sizeof(struct file_dedupe_range_info) +
1474                      sizeof(struct file_dedupe_range), 1);
1475         if (!fdr) {
1476                 prterr("do_dedupe_range: malloc");
1477                 report_failure(161);
1478         }
1479
1480         /* Make sure we have at least two blocks */
1481         new_len = block_size * 2;
1482         if (file_size < new_len && ftruncate(fd, new_len)) {
1483                 warn("main: ftruncate");
1484                 exit(132);
1485         }
1486
1487         /* Try to dedupe them */
1488         fdr->src_length = block_size;
1489         fdr->dest_count = 1;
1490         fdr->info[0].dest_fd = fd;
1491         fdr->info[0].dest_offset = block_size;
1492
1493         if (ioctl(fd, FIDEDUPERANGE, fdr))
1494                 error = errno;
1495         else if (fdr->info[0].status < 0)
1496                 error = -fdr->info[0].status;
1497         else
1498                 error = 0;
1499
1500         /* Older kernels may return EINVAL... */
1501         if (error == EOPNOTSUPP || error == ENOTTY || error == EINVAL) {
1502                 if (!quiet)
1503                         fprintf(stderr,
1504                                 "main: filesystem does not support "
1505                                 "dedupe range, disabling!\n");
1506                 ret = 0;
1507         }
1508
1509         /* Put the file back the way it was. */
1510         if (file_size < new_len && ftruncate(fd, file_size)) {
1511                 warn("main: ftruncate");
1512                 exit(132);
1513         }
1514
1515         free(fdr);
1516         return ret;
1517 }
1518
1519 void
1520 do_dedupe_range(unsigned offset, unsigned length, unsigned dest)
1521 {
1522         struct file_dedupe_range *fdr;
1523
1524         if (length == 0) {
1525                 if (!quiet && testcalls > simulatedopcount)
1526                         prt("skipping zero length dedupe range\n");
1527                 log5(OP_DEDUPE_RANGE, offset, length, dest, FL_SKIPPED);
1528                 return;
1529         }
1530
1531         if ((loff_t)offset >= file_size) {
1532                 if (!quiet && testcalls > simulatedopcount)
1533                         prt("skipping dedupe range behind EOF\n");
1534                 log5(OP_DEDUPE_RANGE, offset, length, dest, FL_SKIPPED);
1535                 return;
1536         }
1537
1538         log5(OP_DEDUPE_RANGE, offset, length, dest, FL_NONE);
1539
1540         if (testcalls <= simulatedopcount)
1541                 return;
1542
1543         if ((progressinterval && testcalls % progressinterval == 0) ||
1544             (debug && (monitorstart == -1 || monitorend == -1 ||
1545                        dest <= monitorstart || dest + length <= monitorend))) {
1546                 prt("%lu dedupe\tfrom 0x%x to 0x%x, (0x%x bytes) at 0x%x\n",
1547                         testcalls, offset, offset+length, length, dest);
1548         }
1549
1550         /* Alloc memory */
1551         fdr = calloc(sizeof(struct file_dedupe_range_info) +
1552                      sizeof(struct file_dedupe_range), 1);
1553         if (!fdr) {
1554                 prterr("do_dedupe_range: malloc");
1555                 report_failure(161);
1556         }
1557
1558         /* Dedupe data blocks */
1559         fdr->src_offset = offset;
1560         fdr->src_length = length;
1561         fdr->dest_count = 1;
1562         fdr->info[0].dest_fd = fd;
1563         fdr->info[0].dest_offset = dest;
1564
1565         if (ioctl(fd, FIDEDUPERANGE, fdr) == -1) {
1566                 prt("dedupe range: 0x%x to 0x%x at 0x%x\n", offset,
1567                                 offset + length, dest);
1568                 prterr("do_dedupe_range(0): FIDEDUPERANGE");
1569                 report_failure(161);
1570         } else if (fdr->info[0].status < 0) {
1571                 errno = -fdr->info[0].status;
1572                 prt("dedupe range: 0x%x to 0x%x at 0x%x\n", offset,
1573                                 offset + length, dest);
1574                 prterr("do_dedupe_range(1): FIDEDUPERANGE");
1575                 report_failure(161);
1576         }
1577
1578         free(fdr);
1579 }
1580
1581 #else
1582 int
1583 test_dedupe_range(void)
1584 {
1585         return 0;
1586 }
1587
1588 void
1589 do_dedupe_range(unsigned offset, unsigned length, unsigned dest)
1590 {
1591         return;
1592 }
1593 #endif
1594
1595 #ifdef HAVE_COPY_FILE_RANGE
1596 int
1597 test_copy_range(void)
1598 {
1599         loff_t o1 = 0, o2 = 1;
1600
1601         if (syscall(__NR_copy_file_range, fd, &o1, fd, &o2, 1, 0) == -1 &&
1602             (errno == ENOSYS || errno == EOPNOTSUPP || errno == ENOTTY)) {
1603                 if (!quiet)
1604                         fprintf(stderr,
1605                                 "main: filesystem does not support "
1606                                 "copy range, disabling!\n");
1607                 return 0;
1608         }
1609
1610         return 1;
1611 }
1612
1613 void
1614 do_copy_range(unsigned offset, unsigned length, unsigned dest)
1615 {
1616         loff_t o1, o2;
1617         size_t olen;
1618         ssize_t nr;
1619         int tries = 0;
1620
1621         if (length == 0) {
1622                 if (!quiet && testcalls > simulatedopcount)
1623                         prt("skipping zero length copy range\n");
1624                 log5(OP_COPY_RANGE, offset, length, dest, FL_SKIPPED);
1625                 return;
1626         }
1627
1628         if ((loff_t)offset >= file_size) {
1629                 if (!quiet && testcalls > simulatedopcount)
1630                         prt("skipping copy range behind EOF\n");
1631                 log5(OP_COPY_RANGE, offset, length, dest, FL_SKIPPED);
1632                 return;
1633         }
1634
1635         if (dest + length > biggest) {
1636                 biggest = dest + length;
1637                 if (!quiet && testcalls > simulatedopcount)
1638                         prt("copying to largest ever: 0x%x\n", dest + length);
1639         }
1640
1641         log5(OP_COPY_RANGE, offset, length, dest, FL_NONE);
1642
1643         if (testcalls <= simulatedopcount)
1644                 return;
1645
1646         if ((progressinterval && testcalls % progressinterval == 0) ||
1647             (debug && (monitorstart == -1 || monitorend == -1 ||
1648                        dest <= monitorstart || dest + length <= monitorend))) {
1649                 prt("%lu copy\tfrom 0x%x to 0x%x, (0x%x bytes) at 0x%x\n",
1650                         testcalls, offset, offset+length, length, dest);
1651         }
1652
1653         o1 = offset;
1654         o2 = dest;
1655         olen = length;
1656
1657         while (olen > 0) {
1658                 nr = syscall(__NR_copy_file_range, fd, &o1, fd, &o2, olen, 0);
1659                 if (nr < 0) {
1660                         if (errno != EAGAIN || tries++ >= 300)
1661                                 break;
1662                 } else if (nr > olen) {
1663                         prt("copy range: 0x%x to 0x%x at 0x%x\n", offset,
1664                                         offset + length, dest);
1665                         prt("do_copy_range: asked %u, copied %u??\n",
1666                                         nr, olen);
1667                         report_failure(161);
1668                 } else if (nr > 0)
1669                         olen -= nr;
1670         }
1671         if (nr < 0) {
1672                 prt("copy range: 0x%x to 0x%x at 0x%x\n", offset,
1673                                 offset + length, dest);
1674                 prterr("do_copy_range:");
1675                 report_failure(161);
1676         }
1677
1678         memcpy(good_buf + dest, good_buf + offset, length);
1679         if (dest > file_size)
1680                 memset(good_buf + file_size, '\0', dest - file_size);
1681         if (dest + length > file_size)
1682                 file_size = dest + length;
1683 }
1684
1685 #else
1686 int
1687 test_copy_range(void)
1688 {
1689         return 0;
1690 }
1691
1692 void
1693 do_copy_range(unsigned offset, unsigned length, unsigned dest)
1694 {
1695         return;
1696 }
1697 #endif
1698
1699 #ifdef HAVE_LINUX_FALLOC_H
1700 /* fallocate is basically a no-op unless extending, then a lot like a truncate */
1701 void
1702 do_preallocate(unsigned offset, unsigned length, int keep_size)
1703 {
1704         unsigned end_offset;
1705
1706         if (length == 0) {
1707                 if (!quiet && testcalls > simulatedopcount)
1708                         prt("skipping zero length fallocate\n");
1709                 log4(OP_FALLOCATE, offset, length, FL_SKIPPED |
1710                      (keep_size ? FL_KEEP_SIZE : FL_NONE));
1711                 return;
1712         }
1713
1714         end_offset = keep_size ? 0 : offset + length;
1715
1716         if (end_offset > biggest) {
1717                 biggest = end_offset;
1718                 if (!quiet && testcalls > simulatedopcount)
1719                         prt("fallocating to largest ever: 0x%x\n", end_offset);
1720         }
1721
1722         /*
1723          * last arg matches fallocate string array index in logdump:
1724          *      0: allocate past EOF
1725          *      1: extending prealloc
1726          *      2: interior prealloc
1727          */
1728         log4(OP_FALLOCATE, offset, length,
1729              keep_size ? FL_KEEP_SIZE : FL_NONE);
1730
1731         if (end_offset > file_size) {
1732                 memset(good_buf + file_size, '\0', end_offset - file_size);
1733                 file_size = end_offset;
1734         }
1735
1736         if (testcalls <= simulatedopcount)
1737                 return;
1738
1739         if ((progressinterval && testcalls % progressinterval == 0) ||
1740             (debug && (monitorstart == -1 || monitorend == -1 ||
1741                       end_offset <= monitorend)))
1742                 prt("%lld falloc\tfrom 0x%x to 0x%x (0x%x bytes)\n", testcalls,
1743                                 offset, offset + length, length);
1744         if (fallocate(fd, keep_size ? FALLOC_FL_KEEP_SIZE : 0, (loff_t)offset, (loff_t)length) == -1) {
1745                 prt("fallocate: 0x%x to 0x%x\n", offset, offset + length);
1746                 prterr("do_preallocate: fallocate");
1747                 report_failure(161);
1748         }
1749 }
1750 #else
1751 void
1752 do_preallocate(unsigned offset, unsigned length, int keep_size)
1753 {
1754         return;
1755 }
1756 #endif
1757
1758 void
1759 writefileimage()
1760 {
1761         ssize_t iret;
1762
1763         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
1764                 prterr("writefileimage: lseek");
1765                 report_failure(171);
1766         }
1767         iret = write(fd, good_buf, file_size);
1768         if ((off_t)iret != file_size) {
1769                 if (iret == -1)
1770                         prterr("writefileimage: write");
1771                 else
1772                         prt("short write: 0x%x bytes instead of 0x%llx\n",
1773                             iret, (unsigned long long)file_size);
1774                 report_failure(172);
1775         }
1776         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
1777                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
1778                 prterr("writefileimage: ftruncate");
1779                 report_failure(173);
1780         }
1781 }
1782
1783
1784 void
1785 docloseopen(void)
1786 {
1787         if (testcalls <= simulatedopcount)
1788                 return;
1789
1790         if (debug)
1791                 prt("%lld close/open\n", testcalls);
1792         if (close(fd)) {
1793                 prterr("docloseopen: close");
1794                 report_failure(180);
1795         }
1796         if (system("echo 3 > /proc/sys/vm/drop_caches")) {
1797                 prterr("docloseopen: drop_caches");
1798                 report_failure(181);
1799         }
1800         fd = open(fname, O_RDWR|o_direct, 0);
1801         if (fd < 0) {
1802                 prterr("docloseopen: open");
1803                 report_failure(182);
1804         }
1805 }
1806
1807 void
1808 dofsync(void)
1809 {
1810         int ret;
1811
1812         if (testcalls <= simulatedopcount)
1813                 return;
1814         if (debug)
1815                 prt("%lld fsync\n", testcalls);
1816         log4(OP_FSYNC, 0, 0, 0);
1817         ret = fsync(fd);
1818         if (ret < 0) {
1819                 prterr("dofsync");
1820                 report_failure(210);
1821         }
1822         mark_log();
1823         dump_fsync_buffer();
1824         mark_nr++;
1825 }
1826
1827 #define TRIM_OFF(off, size)                     \
1828 do {                                            \
1829         if (size)                               \
1830                 (off) %= (size);                \
1831         else                                    \
1832                 (off) = 0;                      \
1833 } while (0)
1834
1835 #define TRIM_LEN(off, len, size)                \
1836 do {                                            \
1837         if ((off) + (len) > (size))             \
1838                 (len) = (size) - (off);         \
1839 } while (0)
1840
1841 #define TRIM_OFF_LEN(off, len, size)            \
1842 do {                                            \
1843         TRIM_OFF(off, size);                    \
1844         TRIM_LEN(off, len, size);               \
1845 } while (0)
1846
1847 void
1848 cleanup(int sig)
1849 {
1850         if (sig)
1851                 prt("signal %d\n", sig);
1852         prt("testcalls = %lld\n", testcalls);
1853         exit(sig);
1854 }
1855
1856 static int
1857 op_args_count(int operation)
1858 {
1859         switch (operation) {
1860         case OP_CLONE_RANGE:
1861         case OP_DEDUPE_RANGE:
1862         case OP_COPY_RANGE:
1863                 return 4;
1864         default:
1865                 return 3;
1866         }
1867 }
1868
1869 static int
1870 read_op(struct log_entry *log_entry)
1871 {
1872         char line[256];
1873
1874         memset(log_entry, 0, sizeof(*log_entry));
1875         log_entry->operation = -1;
1876
1877         while (log_entry->operation == -1) {
1878                 char *str;
1879                 int i;
1880
1881                 do {
1882                         if (!fgets(line, sizeof(line), replayopsf)) {
1883                                 if (feof(replayopsf)) {
1884                                         replayopsf = NULL;
1885                                         return 0;
1886                                 }
1887                                 goto fail;
1888                         }
1889                         str = strtok(line, " \t\n");
1890                 } while (!str || str[0] == '#');
1891
1892                 if (strcmp(str, "skip") == 0) {
1893                         log_entry->flags |= FL_SKIPPED;
1894                         str = strtok(NULL, " \t\n");
1895                         if (!str)
1896                                 goto fail;
1897                 }
1898                 log_entry->operation = op_code(str);
1899                 if (log_entry->operation == -1)
1900                         goto fail;
1901                 log_entry->nr_args = op_args_count(log_entry->operation);
1902                 for (i = 0; i < log_entry->nr_args; i++) {
1903                         char *end;
1904
1905                         str = strtok(NULL, " \t\n");
1906                         if (!str)
1907                                 goto fail;
1908                         log_entry->args[i] = strtoul(str, &end, 0);
1909                         if (*end)
1910                                 goto fail;
1911                 }
1912                 while ((str = strtok(NULL, " \t\n"))) {
1913                         if (strcmp(str, "keep_size") == 0)
1914                                 log_entry->flags |= FL_KEEP_SIZE;
1915                         else if (strcmp(str, "close_open") == 0)
1916                                 log_entry->flags |= FL_CLOSE_OPEN;
1917                         else if (strcmp(str, "*") == 0)
1918                                 ;  /* overlap marker; ignore */
1919                         else
1920                                 goto fail;
1921                 }
1922         }
1923         return 1;
1924
1925 fail:
1926         fprintf(stderr, "%s: parse error\n", replayops);
1927         fclose(replayopsf);
1928         replayopsf = NULL;
1929         cleanup(100);  /* doesn't return */
1930         return 0;
1931 }
1932
1933 static inline bool
1934 range_overlaps(
1935         unsigned long   off0,
1936         unsigned long   off1,
1937         unsigned long   size)
1938 {
1939         return llabs((unsigned long long)off1 - off0) < size;
1940 }
1941
1942 static void generate_dest_range(bool bdy_align,
1943                                 unsigned long max_range_end,
1944                                 unsigned long *src_offset,
1945                                 unsigned long *size,
1946                                 unsigned long *dst_offset)
1947 {
1948         int tries = 0;
1949
1950         TRIM_OFF_LEN(*src_offset, *size, file_size);
1951         if (bdy_align) {
1952                 *src_offset -= *src_offset % readbdy;
1953                 if (o_direct)
1954                         *size -= *size % readbdy;
1955         } else {
1956                 *src_offset = *src_offset & ~(block_size - 1);
1957                 *size = *size & ~(block_size - 1);
1958         }
1959
1960         do {
1961                 if (tries++ >= 30) {
1962                         *size = 0;
1963                         break;
1964                 }
1965                 *dst_offset = random();
1966                 TRIM_OFF(*dst_offset, max_range_end);
1967                 if (bdy_align)
1968                         *dst_offset -= *dst_offset % writebdy;
1969                 else
1970                         *dst_offset = *dst_offset & ~(block_size - 1);
1971         } while (range_overlaps(*src_offset, *dst_offset, *size) ||
1972                  *dst_offset + *size > max_range_end);
1973 }
1974
1975 int
1976 test(void)
1977 {
1978         unsigned long   offset, offset2;
1979         unsigned long   size;
1980         unsigned long   rv;
1981         unsigned long   op;
1982         int             keep_size = 0;
1983
1984         if (simulatedopcount > 0 && testcalls == simulatedopcount)
1985                 writefileimage();
1986
1987         testcalls++;
1988
1989         if (debugstart > 0 && testcalls >= debugstart)
1990                 debug = 1;
1991
1992         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
1993                 prt("%lld...\n", testcalls);
1994
1995         if (replayopsf) {
1996                 struct log_entry log_entry;
1997
1998                 while (read_op(&log_entry)) {
1999                         if (log_entry.flags & FL_SKIPPED) {
2000                                 log4(log_entry.operation,
2001                                      log_entry.args[0], log_entry.args[1],
2002                                      log_entry.flags);
2003                                 continue;
2004                         }
2005
2006                         op = log_entry.operation;
2007                         offset = log_entry.args[0];
2008                         size = log_entry.args[1];
2009                         offset2 = log_entry.args[2];
2010                         closeopen = !!(log_entry.flags & FL_CLOSE_OPEN);
2011                         keep_size = !!(log_entry.flags & FL_KEEP_SIZE);
2012                         goto have_op;
2013                 }
2014                 return 0;
2015         }
2016
2017         rv = random();
2018         if (closeprob)
2019                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
2020
2021         offset = random();
2022         offset2 = 0;
2023         size = maxoplen;
2024         if (randomoplen)
2025                 size = random() % (maxoplen + 1);
2026
2027         /* calculate appropriate op to run */
2028         if (lite)
2029                 op = rv % OP_MAX_LITE;
2030         else if (!integrity)
2031                 op = rv % OP_MAX_FULL;
2032         else
2033                 op = rv % OP_MAX_INTEGRITY;
2034
2035         switch(op) {
2036         case OP_TRUNCATE:
2037                 if (!style)
2038                         size = random() % maxfilelen;
2039                 break;
2040         case OP_FALLOCATE:
2041                 if (fallocate_calls && size && keep_size_calls)
2042                         keep_size = random() % 2;
2043                 break;
2044         case OP_ZERO_RANGE:
2045                 if (zero_range_calls && size && keep_size_calls)
2046                         keep_size = random() % 2;
2047                 break;
2048         case OP_CLONE_RANGE:
2049                 generate_dest_range(false, maxfilelen, &offset, &size, &offset2);
2050                 break;
2051         case OP_DEDUPE_RANGE:
2052                 generate_dest_range(false, file_size, &offset, &size, &offset2);
2053                 break;
2054         case OP_COPY_RANGE:
2055                 generate_dest_range(true, maxfilelen, &offset, &size, &offset2);
2056                 break;
2057         }
2058
2059 have_op:
2060
2061         switch (op) {
2062         case OP_MAPREAD:
2063                 if (!mapped_reads)
2064                         op = OP_READ;
2065                 break;
2066         case OP_MAPWRITE:
2067                 if (!mapped_writes)
2068                         op = OP_WRITE;
2069                 break;
2070         case OP_FALLOCATE:
2071                 if (!fallocate_calls) {
2072                         log4(OP_FALLOCATE, offset, size, FL_SKIPPED);
2073                         goto out;
2074                 }
2075                 break;
2076         case OP_PUNCH_HOLE:
2077                 if (!punch_hole_calls) {
2078                         log4(OP_PUNCH_HOLE, offset, size, FL_SKIPPED);
2079                         goto out;
2080                 }
2081                 break;
2082         case OP_ZERO_RANGE:
2083                 if (!zero_range_calls) {
2084                         log4(OP_ZERO_RANGE, offset, size, FL_SKIPPED);
2085                         goto out;
2086                 }
2087                 break;
2088         case OP_COLLAPSE_RANGE:
2089                 if (!collapse_range_calls) {
2090                         log4(OP_COLLAPSE_RANGE, offset, size, FL_SKIPPED);
2091                         goto out;
2092                 }
2093                 break;
2094         case OP_INSERT_RANGE:
2095                 if (!insert_range_calls) {
2096                         log4(OP_INSERT_RANGE, offset, size, FL_SKIPPED);
2097                         goto out;
2098                 }
2099                 break;
2100         case OP_CLONE_RANGE:
2101                 if (!clone_range_calls) {
2102                         log5(op, offset, size, offset2, FL_SKIPPED);
2103                         goto out;
2104                 }
2105                 break;
2106         case OP_DEDUPE_RANGE:
2107                 if (!dedupe_range_calls) {
2108                         log5(op, offset, size, offset2, FL_SKIPPED);
2109                         goto out;
2110                 }
2111                 break;
2112         case OP_COPY_RANGE:
2113                 if (!copy_range_calls) {
2114                         log5(op, offset, size, offset2, FL_SKIPPED);
2115                         goto out;
2116                 }
2117                 break;
2118         }
2119
2120         switch (op) {
2121         case OP_READ:
2122                 TRIM_OFF_LEN(offset, size, file_size);
2123                 doread(offset, size);
2124                 break;
2125
2126         case OP_WRITE:
2127                 TRIM_OFF_LEN(offset, size, maxfilelen);
2128                 dowrite(offset, size);
2129                 break;
2130
2131         case OP_MAPREAD:
2132                 TRIM_OFF_LEN(offset, size, file_size);
2133                 domapread(offset, size);
2134                 break;
2135
2136         case OP_MAPWRITE:
2137                 TRIM_OFF_LEN(offset, size, maxfilelen);
2138                 domapwrite(offset, size);
2139                 break;
2140
2141         case OP_TRUNCATE:
2142                 dotruncate(size);
2143                 break;
2144
2145         case OP_FALLOCATE:
2146                 TRIM_OFF_LEN(offset, size, maxfilelen);
2147                 do_preallocate(offset, size, keep_size);
2148                 break;
2149
2150         case OP_PUNCH_HOLE:
2151                 TRIM_OFF_LEN(offset, size, file_size);
2152                 do_punch_hole(offset, size);
2153                 break;
2154         case OP_ZERO_RANGE:
2155                 TRIM_OFF_LEN(offset, size, maxfilelen);
2156                 do_zero_range(offset, size, keep_size);
2157                 break;
2158         case OP_COLLAPSE_RANGE:
2159                 TRIM_OFF_LEN(offset, size, file_size - 1);
2160                 offset = offset & ~(block_size - 1);
2161                 size = size & ~(block_size - 1);
2162                 if (size == 0) {
2163                         log4(OP_COLLAPSE_RANGE, offset, size, FL_SKIPPED);
2164                         goto out;
2165                 }
2166                 do_collapse_range(offset, size);
2167                 break;
2168         case OP_INSERT_RANGE:
2169                 TRIM_OFF(offset, file_size);
2170                 TRIM_LEN(file_size, size, maxfilelen);
2171                 offset = offset & ~(block_size - 1);
2172                 size = size & ~(block_size - 1);
2173                 if (size == 0) {
2174                         log4(OP_INSERT_RANGE, offset, size, FL_SKIPPED);
2175                         goto out;
2176                 }
2177                 if (file_size + size > maxfilelen) {
2178                         log4(OP_INSERT_RANGE, offset, size, FL_SKIPPED);
2179                         goto out;
2180                 }
2181
2182                 do_insert_range(offset, size);
2183                 break;
2184         case OP_CLONE_RANGE:
2185                 if (size == 0) {
2186                         log5(OP_CLONE_RANGE, offset, size, offset2, FL_SKIPPED);
2187                         goto out;
2188                 }
2189                 if (offset2 + size > maxfilelen) {
2190                         log5(OP_CLONE_RANGE, offset, size, offset2, FL_SKIPPED);
2191                         goto out;
2192                 }
2193
2194                 do_clone_range(offset, size, offset2);
2195                 break;
2196         case OP_DEDUPE_RANGE:
2197                 if (size == 0) {
2198                         log5(OP_DEDUPE_RANGE, offset, size, offset2, FL_SKIPPED);
2199                         goto out;
2200                 }
2201                 if (offset2 + size > maxfilelen) {
2202                         log5(OP_DEDUPE_RANGE, offset, size, offset2, FL_SKIPPED);
2203                         goto out;
2204                 }
2205
2206                 do_dedupe_range(offset, size, offset2);
2207                 break;
2208         case OP_COPY_RANGE:
2209                 if (size == 0) {
2210                         log5(OP_COPY_RANGE, offset, size, offset2, FL_SKIPPED);
2211                         goto out;
2212                 }
2213                 if (offset2 + size > maxfilelen) {
2214                         log5(OP_COPY_RANGE, offset, size, offset2, FL_SKIPPED);
2215                         goto out;
2216                 }
2217
2218                 do_copy_range(offset, size, offset2);
2219                 break;
2220         case OP_FSYNC:
2221                 dofsync();
2222                 break;
2223         default:
2224                 prterr("test: unknown operation");
2225                 report_failure(42);
2226                 break;
2227         }
2228
2229         if (check_file && testcalls > simulatedopcount)
2230                 check_contents();
2231
2232 out:
2233         if (closeopen)
2234                 docloseopen();
2235         if (sizechecks && testcalls > simulatedopcount)
2236                 check_size();
2237         return 1;
2238 }
2239
2240
2241 void
2242 usage(void)
2243 {
2244         fprintf(stdout, "usage: %s",
2245                 "fsx [-dknqxABEFJLOWZ] [-b opnum] [-c Prob] [-g filldata] [-i logdev] [-j logid] [-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\
2246         -b opnum: beginning operation number (default 1)\n\
2247         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
2248         -d: debug output for all operations\n\
2249         -f flush and invalidate cache after I/O\n\
2250         -g X: write character X instead of random generated data\n\
2251         -i logdev: do integrity testing, logdev is the dm log writes device\n\
2252         -j logid: prefix debug log messsages with this id\n\
2253         -k: do not truncate existing file and use its size as upper bound on file size\n\
2254         -l flen: the upper bound on file size (default 262144)\n\
2255         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
2256         -n: no verifications of file size\n\
2257         -o oplen: the upper bound on operation size (default 65536)\n\
2258         -p progressinterval: debug output at specified operation interval\n\
2259         -q: quieter operation\n\
2260         -r readbdy: 4096 would make reads page aligned (default 1)\n\
2261         -s style: 1 gives smaller truncates (default 0)\n\
2262         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
2263         -w writebdy: 4096 would make writes page aligned (default 1)\n\
2264         -x: preallocate file space before starting, XFS only (default 0)\n\
2265         -y synchronize changes to a file\n"
2266
2267 #ifdef AIO
2268 "       -A: Use the AIO system calls\n"
2269 #endif
2270 "       -D startingop: debug output starting at specified operation\n"
2271 #ifdef HAVE_LINUX_FALLOC_H
2272 "       -F: Do not use fallocate (preallocation) calls\n"
2273 #endif
2274 #ifdef FALLOC_FL_PUNCH_HOLE
2275 "       -H: Do not use punch hole calls\n"
2276 #endif
2277 #ifdef FALLOC_FL_ZERO_RANGE
2278 "       -z: Do not use zero range calls\n"
2279 #endif
2280 #ifdef FALLOC_FL_COLLAPSE_RANGE
2281 "       -C: Do not use collapse range calls\n"
2282 #endif
2283 #ifdef FALLOC_FL_INSERT_RANGE
2284 "       -I: Do not use insert range calls\n"
2285 #endif
2286 #ifdef FICLONERANGE
2287 "       -J: Do not use clone range calls\n"
2288 #endif
2289 #ifdef FIDEDUPERANGE
2290 "       -B: Do not use dedupe range calls\n"
2291 #endif
2292 #ifdef HAVE_COPY_FILE_RANGE
2293 "       -E: Do not use copy range calls\n"
2294 #endif
2295 "       -L: fsxLite - no file creations & no file size changes\n\
2296         -N numops: total # operations to do (default infinity)\n\
2297         -O: use oplen (see -o flag) for every op (default random)\n\
2298         -P: save .fsxlog .fsxops and .fsxgood files in dirpath (default ./)\n\
2299         -S seed: for random # generator (default 1) 0 gets timestamp\n\
2300         -W: mapped write operations DISabled\n\
2301         -X: Read file and compare to good buffer after every operation.\n\
2302         -R: read() system calls only (mapped reads disabled)\n\
2303         -Z: O_DIRECT (use -R, -W, -r and -w too)\n\
2304         --replay-ops opsfile: replay ops from recorded .fsxops file\n\
2305         --record-ops[=opsfile]: dump ops file also on success. optionally specify ops file name\n\
2306         fname: this filename is REQUIRED (no default)\n");
2307         exit(90);
2308 }
2309
2310
2311 long long
2312 getnum(char *s, char **e)
2313 {
2314         long long ret;
2315
2316         *e = (char *) 0;
2317         ret = strtoll(s, e, 0);
2318         if (*e)
2319                 switch (**e) {
2320                 case 'b':
2321                 case 'B':
2322                         ret *= 512;
2323                         *e = *e + 1;
2324                         break;
2325                 case 'k':
2326                 case 'K':
2327                         ret *= 1024;
2328                         *e = *e + 1;
2329                         break;
2330                 case 'm':
2331                 case 'M':
2332                         ret *= 1024*1024;
2333                         *e = *e + 1;
2334                         break;
2335                 case 'w':
2336                 case 'W':
2337                         ret *= 4;
2338                         *e = *e + 1;
2339                         break;
2340                 }
2341         return (ret);
2342 }
2343
2344 #ifdef AIO
2345
2346 #define QSZ     1024
2347 io_context_t    io_ctx;
2348 struct iocb     iocb;
2349
2350 int aio_setup()
2351 {
2352         int ret;
2353         ret = io_queue_init(QSZ, &io_ctx);
2354         if (ret != 0) {
2355                 fprintf(stderr, "aio_setup: io_queue_init failed: %s\n",
2356                         strerror(ret));
2357                 return(-1);
2358         }
2359         return(0);
2360 }
2361
2362 int
2363 __aio_rw(int rw, int fd, char *buf, unsigned len, unsigned offset)
2364 {
2365         struct io_event event;
2366         static struct timespec ts;
2367         struct iocb *iocbs[] = { &iocb };
2368         int ret;
2369         long res;
2370
2371         if (rw == READ) {
2372                 io_prep_pread(&iocb, fd, buf, len, offset);
2373         } else {
2374                 io_prep_pwrite(&iocb, fd, buf, len, offset);
2375         }
2376
2377         ts.tv_sec = 30;
2378         ts.tv_nsec = 0;
2379         ret = io_submit(io_ctx, 1, iocbs);
2380         if (ret != 1) {
2381                 fprintf(stderr, "errcode=%d\n", ret);
2382                 fprintf(stderr, "aio_rw: io_submit failed: %s\n",
2383                                 strerror(ret));
2384                 goto out_error;
2385         }
2386
2387         ret = io_getevents(io_ctx, 1, 1, &event, &ts);
2388         if (ret != 1) {
2389                 if (ret == 0)
2390                         fprintf(stderr, "aio_rw: no events available\n");
2391                 else {
2392                         fprintf(stderr, "errcode=%d\n", -ret);
2393                         fprintf(stderr, "aio_rw: io_getevents failed: %s\n",
2394                                         strerror(-ret));
2395                 }
2396                 goto out_error;
2397         }
2398         if (len != event.res) {
2399                 /*
2400                  * The b0rked libaio defines event.res as unsigned.
2401                  * However the kernel strucuture has it signed,
2402                  * and it's used to pass negated error value.
2403                  * Till the library is fixed use the temp var.
2404                  */
2405                 res = (long)event.res;
2406                 if (res >= 0)
2407                         fprintf(stderr, "bad io length: %lu instead of %u\n",
2408                                         res, len);
2409                 else {
2410                         fprintf(stderr, "errcode=%ld\n", -res);
2411                         fprintf(stderr, "aio_rw: async io failed: %s\n",
2412                                         strerror(-res));
2413                         ret = res;
2414                         goto out_error;
2415                 }
2416
2417         }
2418         return event.res;
2419
2420 out_error:
2421         /*
2422          * The caller expects error return in traditional libc
2423          * convention, i.e. -1 and the errno set to error.
2424          */
2425         errno = -ret;
2426         return -1;
2427 }
2428
2429 int aio_rw(int rw, int fd, char *buf, unsigned len, unsigned offset)
2430 {
2431         int ret;
2432
2433         if (aio) {
2434                 ret = __aio_rw(rw, fd, buf, len, offset);
2435         } else {
2436                 if (rw == READ)
2437                         ret = read(fd, buf, len);
2438                 else
2439                         ret = write(fd, buf, len);
2440         }
2441         return ret;
2442 }
2443
2444 #endif
2445
2446 #define test_fallocate(mode) __test_fallocate(mode, #mode)
2447
2448 int
2449 __test_fallocate(int mode, const char *mode_str)
2450 {
2451 #ifdef HAVE_LINUX_FALLOC_H
2452         int ret = 0;
2453         if (!lite) {
2454                 if (fallocate(fd, mode, file_size, 1) &&
2455                     (errno == ENOSYS || errno == EOPNOTSUPP)) {
2456                         if(!quiet)
2457                                 fprintf(stderr,
2458                                         "main: filesystem does not support "
2459                                         "fallocate mode %s, disabling!\n",
2460                                         mode_str);
2461                 } else {
2462                         ret = 1;
2463                         if (ftruncate(fd, file_size)) {
2464                                 warn("main: ftruncate");
2465                                 exit(132);
2466                         }
2467                 }
2468         }
2469         return ret;
2470 #endif
2471 }
2472
2473 static struct option longopts[] = {
2474         {"replay-ops", required_argument, 0, 256},
2475         {"record-ops", optional_argument, 0, 255},
2476         { }
2477 };
2478
2479 int
2480 main(int argc, char **argv)
2481 {
2482         int     i, style, ch;
2483         char    *endp, *tmp;
2484         char logfile[PATH_MAX];
2485         struct stat statbuf;
2486         int o_flags = O_RDWR|O_CREAT|O_TRUNC;
2487
2488         logfile[0] = 0;
2489         dname[0] = 0;
2490
2491         page_size = getpagesize();
2492         page_mask = page_size - 1;
2493         mmap_mask = page_mask;
2494
2495
2496         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
2497
2498         while ((ch = getopt_long(argc, argv,
2499                                  "b:c:dfg:i:j:kl:m:no:p:qr:s:t:w:xyABD:EFJKHzCILN:OP:RS:WXZ",
2500                                  longopts, NULL)) != EOF)
2501                 switch (ch) {
2502                 case 'b':
2503                         simulatedopcount = getnum(optarg, &endp);
2504                         if (!quiet)
2505                                 prt("Will begin at operation %lld\n",
2506                                                 simulatedopcount);
2507                         if (simulatedopcount == 0)
2508                                 usage();
2509                         simulatedopcount -= 1;
2510                         break;
2511                 case 'c':
2512                         closeprob = getnum(optarg, &endp);
2513                         if (!quiet)
2514                                 prt("Chance of close/open is 1 in %d\n", closeprob);
2515                         if (closeprob <= 0)
2516                                 usage();
2517                         break;
2518                 case 'd':
2519                         debug = 1;
2520                         break;
2521                 case 'f':
2522                         flush = 1;
2523                         break;
2524                 case 'g':
2525                         filldata = *optarg;
2526                         break;
2527                 case 'i':
2528                         integrity = 1;
2529                         logdev = strdup(optarg);
2530                         if (!logdev) {
2531                                 prterr("strdup");
2532                                 exit(101);
2533                         }
2534                         break;
2535                 case 'j':
2536                         logid = strdup(optarg);
2537                         if (!logid) {
2538                                 prterr("strdup");
2539                                 exit(101);
2540                         }
2541                         break;
2542                 case 'k':
2543                         o_flags &= ~O_TRUNC;
2544                         break;
2545                 case 'l':
2546                         maxfilelen = getnum(optarg, &endp);
2547                         if (maxfilelen <= 0)
2548                                 usage();
2549                         break;
2550                 case 'm':
2551                         monitorstart = getnum(optarg, &endp);
2552                         if (monitorstart < 0)
2553                                 usage();
2554                         if (!endp || *endp++ != ':')
2555                                 usage();
2556                         monitorend = getnum(endp, &endp);
2557                         if (monitorend < 0)
2558                                 usage();
2559                         if (monitorend == 0)
2560                                 monitorend = -1; /* aka infinity */
2561                         debug = 1;
2562                 case 'n':
2563                         sizechecks = 0;
2564                         break;
2565                 case 'o':
2566                         maxoplen = getnum(optarg, &endp);
2567                         if (maxoplen <= 0)
2568                                 usage();
2569                         break;
2570                 case 'p':
2571                         progressinterval = getnum(optarg, &endp);
2572                         if (progressinterval == 0)
2573                                 usage();
2574                         break;
2575                 case 'q':
2576                         quiet = 1;
2577                         break;
2578                 case 'r':
2579                         readbdy = getnum(optarg, &endp);
2580                         if (readbdy <= 0)
2581                                 usage();
2582                         break;
2583                 case 's':
2584                         style = getnum(optarg, &endp);
2585                         if (style < 0 || style > 1)
2586                                 usage();
2587                         break;
2588                 case 't':
2589                         truncbdy = getnum(optarg, &endp);
2590                         if (truncbdy <= 0)
2591                                 usage();
2592                         break;
2593                 case 'w':
2594                         writebdy = getnum(optarg, &endp);
2595                         if (writebdy <= 0)
2596                                 usage();
2597                         break;
2598                 case 'x':
2599                         prealloc = 1;
2600                         break;
2601                 case 'y':
2602                         do_fsync = 1;
2603                         break;
2604                 case 'A':
2605                         aio = 1;
2606                         break;
2607                 case 'D':
2608                         debugstart = getnum(optarg, &endp);
2609                         if (debugstart < 1)
2610                                 usage();
2611                         break;
2612                 case 'F':
2613                         fallocate_calls = 0;
2614                         break;
2615                 case 'K':
2616                         keep_size_calls = 0;
2617                         break;
2618                 case 'H':
2619                         punch_hole_calls = 0;
2620                         break;
2621                 case 'z':
2622                         zero_range_calls = 0;
2623                         break;
2624                 case 'C':
2625                         collapse_range_calls = 0;
2626                         break;
2627                 case 'I':
2628                         insert_range_calls = 0;
2629                         break;
2630                 case 'J':
2631                         clone_range_calls = 0;
2632                         break;
2633                 case 'B':
2634                         dedupe_range_calls = 0;
2635                         break;
2636                 case 'E':
2637                         copy_range_calls = 0;
2638                         break;
2639                 case 'L':
2640                         lite = 1;
2641                         o_flags &= ~(O_CREAT|O_TRUNC);
2642                         break;
2643                 case 'N':
2644                         numops = getnum(optarg, &endp);
2645                         if (numops < 0)
2646                                 usage();
2647                         break;
2648                 case 'O':
2649                         randomoplen = 0;
2650                         break;
2651                 case 'P':
2652                         strncpy(dname, optarg, sizeof(dname));
2653                         strcat(dname, "/");
2654                         dirpath = strlen(dname);
2655                         break;
2656                 case 'R':
2657                         mapped_reads = 0;
2658                         break;
2659                 case 'S':
2660                         seed = getnum(optarg, &endp);
2661                         if (seed == 0) {
2662                                 seed = time(0) % 10000;
2663                                 seed += (int)getpid();
2664                         }
2665                         if (seed < 0)
2666                                 usage();
2667                         break;
2668                 case 'W':
2669                         mapped_writes = 0;
2670                         if (!quiet)
2671                                 prt("mapped writes DISABLED\n");
2672                         break;
2673                 case 'X':
2674                         check_file = 1;
2675                         break;
2676                 case 'Z':
2677                         o_direct = O_DIRECT;
2678                         o_flags |= O_DIRECT;
2679                         break;
2680                 case 255:  /* --record-ops */
2681                         if (optarg)
2682                                 strncpy(opsfile, optarg, sizeof(opsfile));
2683                         recordops = opsfile;
2684                         break;
2685                 case 256:  /* --replay-ops */
2686                         replayops = optarg;
2687                         break;
2688                 default:
2689                         usage();
2690                         /* NOTREACHED */
2691                 }
2692         argc -= optind;
2693         argv += optind;
2694         if (argc != 1)
2695                 usage();
2696
2697         if (integrity && !dirpath) {
2698                 fprintf(stderr, "option -i <logdev> requires -P <dirpath>\n");
2699                 usage();
2700         }
2701
2702         fname = argv[0];
2703         tmp = strdup(fname);
2704         if (!tmp) {
2705                 prterr("strdup");
2706                 exit(101);
2707         }
2708         bname = basename(tmp);
2709
2710         signal(SIGHUP,  cleanup);
2711         signal(SIGINT,  cleanup);
2712         signal(SIGPIPE, cleanup);
2713         signal(SIGALRM, cleanup);
2714         signal(SIGTERM, cleanup);
2715         signal(SIGXCPU, cleanup);
2716         signal(SIGXFSZ, cleanup);
2717         signal(SIGVTALRM,       cleanup);
2718         signal(SIGUSR1, cleanup);
2719         signal(SIGUSR2, cleanup);
2720
2721         if (!quiet && seed)
2722                 prt("Seed set to %d\n", seed);
2723         srandom(seed);
2724         fd = open(fname, o_flags, 0666);
2725         if (fd < 0) {
2726                 prterr(fname);
2727                 exit(91);
2728         }
2729         if (fstat(fd, &statbuf)) {
2730                 prterr("check_size: fstat");
2731                 exit(91);
2732         }
2733         block_size = statbuf.st_blksize;
2734 #ifdef XFS
2735         if (prealloc) {
2736                 xfs_flock64_t   resv = { 0 };
2737 #ifdef HAVE_XFS_PLATFORM_DEFS_H
2738                 if (!platform_test_xfs_fd(fd)) {
2739                         prterr(fname);
2740                         fprintf(stderr, "main: cannot prealloc, non XFS\n");
2741                         exit(96);
2742                 }
2743 #endif
2744                 resv.l_len = maxfilelen;
2745                 if ((xfsctl(fname, fd, XFS_IOC_RESVSP, &resv)) < 0) {
2746                         prterr(fname);
2747                         exit(97);
2748                 }
2749         }
2750 #endif
2751
2752         if (dirpath) {
2753                 snprintf(goodfile, sizeof(goodfile), "%s%s.fsxgood", dname, bname);
2754                 snprintf(logfile, sizeof(logfile), "%s%s.fsxlog", dname, bname);
2755                 if (!*opsfile)
2756                         snprintf(opsfile, sizeof(opsfile), "%s%s.fsxops", dname, bname);
2757         } else {
2758                 snprintf(goodfile, sizeof(goodfile), "%s.fsxgood", fname);
2759                 snprintf(logfile, sizeof(logfile), "%s.fsxlog", fname);
2760                 if (!*opsfile)
2761                         snprintf(opsfile, sizeof(opsfile), "%s.fsxops", fname);
2762         }
2763         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
2764         if (fsxgoodfd < 0) {
2765                 prterr(goodfile);
2766                 exit(92);
2767         }
2768         fsxlogf = fopen(logfile, "w");
2769         if (fsxlogf == NULL) {
2770                 prterr(logfile);
2771                 exit(93);
2772         }
2773         unlink(opsfile);
2774
2775         if (replayops) {
2776                 replayopsf = fopen(replayops, "r");
2777                 if (!replayopsf) {
2778                         prterr(replayops);
2779                         exit(93);
2780                 }
2781         }
2782
2783 #ifdef AIO
2784         if (aio)
2785                 aio_setup();
2786 #endif
2787
2788         if (!(o_flags & O_TRUNC)) {
2789                 off_t ret;
2790                 file_size = maxfilelen = biggest = lseek(fd, (off_t)0, SEEK_END);
2791                 if (file_size == (off_t)-1) {
2792                         prterr(fname);
2793                         warn("main: lseek eof");
2794                         exit(94);
2795                 }
2796                 ret = lseek(fd, (off_t)0, SEEK_SET);
2797                 if (ret == (off_t)-1) {
2798                         prterr(fname);
2799                         warn("main: lseek 0");
2800                         exit(95);
2801                 }
2802         }
2803         original_buf = (char *) malloc(maxfilelen);
2804         for (i = 0; i < maxfilelen; i++)
2805                 original_buf[i] = random() % 256;
2806         good_buf = (char *) malloc(maxfilelen + writebdy);
2807         good_buf = round_ptr_up(good_buf, writebdy, 0);
2808         memset(good_buf, '\0', maxfilelen);
2809         temp_buf = (char *) malloc(maxoplen + readbdy);
2810         temp_buf = round_ptr_up(temp_buf, readbdy, 0);
2811         memset(temp_buf, '\0', maxoplen);
2812         if (lite) {     /* zero entire existing file */
2813                 ssize_t written;
2814
2815                 written = write(fd, good_buf, (size_t)maxfilelen);
2816                 if (written != maxfilelen) {
2817                         if (written == -1) {
2818                                 prterr(fname);
2819                                 warn("main: error on write");
2820                         } else
2821                                 warn("main: short write, 0x%x bytes instead "
2822                                         "of 0x%lx\n",
2823                                         (unsigned)written,
2824                                         maxfilelen);
2825                         exit(98);
2826                 }
2827         } else {
2828                 ssize_t ret, len = file_size;
2829                 off_t off = 0;
2830
2831                 while (len > 0) {
2832                         ret = read(fd, good_buf + off, len);
2833                         if (ret == -1) {
2834                                 prterr(fname);
2835                                 warn("main: error on read");
2836                                 exit(98);
2837                         }
2838                         len -= ret;
2839                         off += ret;
2840                 }
2841
2842                 check_trunc_hack();
2843         }
2844
2845         if (fallocate_calls)
2846                 fallocate_calls = test_fallocate(0);
2847         if (keep_size_calls)
2848                 keep_size_calls = test_fallocate(FALLOC_FL_KEEP_SIZE);
2849         if (punch_hole_calls)
2850                 punch_hole_calls = test_fallocate(FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
2851         if (zero_range_calls)
2852                 zero_range_calls = test_fallocate(FALLOC_FL_ZERO_RANGE);
2853         if (collapse_range_calls)
2854                 collapse_range_calls = test_fallocate(FALLOC_FL_COLLAPSE_RANGE);
2855         if (insert_range_calls)
2856                 insert_range_calls = test_fallocate(FALLOC_FL_INSERT_RANGE);
2857         if (clone_range_calls)
2858                 clone_range_calls = test_clone_range();
2859         if (dedupe_range_calls)
2860                 dedupe_range_calls = test_dedupe_range();
2861         if (copy_range_calls)
2862                 copy_range_calls = test_copy_range();
2863
2864         while (numops == -1 || numops--)
2865                 if (!test())
2866                         break;
2867
2868         free(tmp);
2869         if (close(fd)) {
2870                 prterr("close");
2871                 report_failure(99);
2872         }
2873         prt("All %lld operations completed A-OK!\n", testcalls);
2874         if (recordops)
2875                 logdump();
2876
2877         exit(0);
2878         return 0;
2879 }