lustre/utils/llverfs.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/utils/llverfs.c
  33  *
  34  * Filesystem Verification Tool.
  35  * This program tests the correct operation of large filesystems and
  36  * the underlying block storage device(s).
  37  * This tool have two working modes
  38  * 1. full mode
  39  * 2. partial mode
  40  *
  41  * In full mode, the program creates a subdirectory in the test
  42  * filesystem, writes n(files_in_dir, default=32) large(4GB) files to
  43  * the directory with the test pattern at the start of each 4kb block.
  44  * The test pattern contains timestamp, relative file offset and per
  45  * file unique identifier(inode number).  This continues until the
  46  * whole filesystem is full and then the tool verifies that the data
  47  * in all of the test files is correct.
  48  *
  49  * In partial mode, the tool creates test directories with the
  50  * EXT3_TOPDIR_FL flag set (if supported) to spread the directory data
  51  * around the block device instead of localizing it in a single place.
  52  * The number of directories equals to the number of block groups in the
  53  * filesystem (e.g. 65536 directories for 8TB ext3/ext4 filesystem) and
  54  * then writes a single 1MB file in each directory. The tool then verifies
  55  * that the data in each file is correct.
  56  */
  57
  58 #ifndef _GNU_SOURCE
  59 #define _GNU_SOURCE
  60 #endif
  61 #ifndef LUSTRE_UTILS
  62 #define LUSTRE_UTILS
  63 #endif
  64 #ifndef _LARGEFILE64_SOURCE
  65 #define _LARGEFILE64_SOURCE
  66 #endif
  67 #ifndef _FILE_OFFSET_BITS
  68 #define _FILE_OFFSET_BITS 64
  69 #endif
  70
  71 #include <features.h>
  72 #include <stdlib.h>
  73 #include <stdio.h>
  74 #include <string.h>
  75 #include <ctype.h>
  76 #include <fcntl.h>
  77 #include <unistd.h>
  78 #include <limits.h>
  79 #include <errno.h>
  80 #include <fcntl.h>
  81 #include <getopt.h>
  82 #include <time.h>
  83 #include <dirent.h>
  84 #include <mntent.h>
  85 #include <sys/types.h>
  86 #include <sys/stat.h>
  87 #include <sys/vfs.h>
  88 #include <sys/time.h>
  89 #include <gnu/stubs.h>
  90 #include <gnu/stubs.h>
  91
  92 #ifdef HAVE_EXT2FS_EXT2FS_H
  93 #  include <e2p/e2p.h>
  94 #  include <ext2fs/ext2fs.h>
  95 #endif
  96
  97 #define ONE_MB (1024 * 1024)
  98 #define ONE_GB ((unsigned long long)(1024 * 1024 * 1024))
  99 #define BLOCKSIZE 4096
 100
 101 /* Structure for writing test pattern */
 102 struct block_data {
 103         unsigned long long bd_offset;
 104         unsigned long long bd_time;
 105         unsigned long long bd_inode;
 106 };
 107 static char *progname;              /* name by which this program was run. */
 108 static unsigned verbose = 1;        /* prints offset in kB, operation rate */
 109 static int readoption;              /* run test in read-only (verify) mode */
 110 static int writeoption;             /* run test in write_only mode */
 111 char *testdir;                      /* name of device to be tested. */
 112 static unsigned full = 1;           /* flag to full check */
 113 static int error_count;             /* number of IO errors hit during run */
 114 char filecount[PATH_MAX];           /* file with total number of files written*/
 115 static unsigned long num_files;     /* Total number of files for read/write */
 116 static loff_t file_size = 4*ONE_GB; /* Size of each file */
 117 static unsigned files_in_dir = 32;  /* number of files in each directioy */
 118 static unsigned num_dirs = 30000;   /* total number of directories */
 119 const int dirmode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
 120 static int isatty_flag;
 121 static int perms =  S_IRWXU | S_IRGRP | S_IROTH;
 122
 123 static struct option const long_opts[] = {
 124         { .val = 'c',   .name = "chunksize",    .has_arg = required_argument },
 125         { .val = 'h',   .name = "help",         .has_arg = no_argument },
 126         { .val = 'l',   .name = "long",         .has_arg = no_argument },
 127         { .val = 'l',   .name = "full",         .has_arg = no_argument },
 128         { .val = 'o',   .name = "offset",       .has_arg = required_argument },
 129         { .val = 'p',   .name = "partial",      .has_arg = required_argument },
 130         { .val = 'q',   .name = "quiet",        .has_arg = required_argument },
 131         { .val = 'r',   .name = "read",         .has_arg = no_argument },
 132         { .val = 's',   .name = "filesize",     .has_arg = no_argument },
 133         { .val = 't',   .name = "timestamp",    .has_arg = required_argument },
 134         { .val = 'v',   .name = "verbose",      .has_arg = no_argument },
 135         { .val = 'w',   .name = "write",        .has_arg = no_argument },
 136         { .name = NULL } };
 137
 138 /*
 139  * Usages: displays help information, whenever user supply --help option in
 140  * command or enters incorrect command line.
 141  */
 142 void usage(int status)
 143 {
 144         if (status != 0) {
 145                 printf("\nUsage: %s [OPTION]... <filesystem path> ...\n",
 146                        progname);
 147                 printf("Filesystem verification tool.\n"
 148                        "\t-t {seconds}, --timestamp,  set test time"
 149                        "(default=current time())\n"
 150                        "\t-o {offset}, --offset, directory starting offset"
 151                        " from which tests should start\n"
 152                        "\t-r, --read, run in verify mode\n"
 153                        "\t-w, --write, run in test-pattern mode, default=rw\n"
 154                        "\t-v, --verbose\n"
 155                        "\t-p, --partial, for partial check (1MB files)\n"
 156                        "\t-l, --long, --full check (4GB file with 4k blocks)\n"
 157                        "\t-c, --chunksize, IO chunk size in MB (default=1)\n"
 158                        "\t-s, --filesize, file size in MB (default=4096)\n"
 159                        "\t-h, --help, display this help and exit\n");
 160         }
 161         exit(status);
 162 }
 163
 164 /*
 165  * open_file: Opens file in specified mode and returns fd.
 166  */
 167 static int open_file(const char *file, int flag)
 168 {
 169         int fd = open(file, flag, perms);
 170         if (fd < 0) {
 171                 fprintf(stderr, "\n%s: Open '%s' failed:%s\n",
 172                         progname, file, strerror(errno));
 173         }
 174         return (fd);
 175 }
 176
 177 /*
 178  * Verify_chunk: Verifies test pattern in each 4kB (BLOCKSIZE) is correct.
 179  * Returns 0 if test offset and timestamp is correct otherwise 1.
 180  */
 181 int verify_chunk(char *chunk_buf, const size_t chunksize,
 182                  unsigned long long chunk_off, const unsigned long long time_st,
 183                  const unsigned long long inode_st, const char *file)
 184 {
 185         struct block_data *bd;
 186         char *chunk_end;
 187
 188         for (chunk_end = chunk_buf + chunksize - sizeof(*bd);
 189              (char *)chunk_buf < chunk_end;
 190              chunk_buf += BLOCKSIZE, chunk_off += BLOCKSIZE) {
 191                 bd = (struct block_data *)chunk_buf;
 192                 if ((bd->bd_offset == chunk_off) && (bd->bd_time == time_st) &&
 193                     (bd->bd_inode == inode_st))
 194                         continue;
 195                 fprintf(stderr, "\n%s: verify %s failed offset/timestamp/inode "
 196                         "%llu/%llu/%llu: found %llu/%llu/%llu instead\n",
 197                         progname, file, chunk_off, time_st, inode_st,
 198                         bd->bd_offset, bd->bd_time, bd->bd_inode);
 199                 return 1;
 200         }
 201         return 0;
 202 }
 203
 204 /*
 205  * fill_chunk: Fills the chunk with current or user specified timestamp
 206  * and offset. The test pattern is filled at the beginning of
 207  * each 4kB(BLOCKSIZE) blocks in chunk_buf.
 208  */
 209 void fill_chunk(char *chunk_buf, size_t chunksize, loff_t chunk_off,
 210                 const time_t time_st, const ino_t inode_st)
 211 {
 212         struct block_data *bd;
 213         char *chunk_end;
 214
 215         for (chunk_end = chunk_buf + chunksize - sizeof(*bd);
 216              (char *)chunk_buf < chunk_end;
 217              chunk_buf += BLOCKSIZE, chunk_off += BLOCKSIZE) {
 218                 bd = (struct block_data *)chunk_buf;
 219                 bd->bd_offset = chunk_off;
 220                 bd->bd_time = time_st;
 221                 bd->bd_inode = inode_st;
 222         }
 223 }
 224
 225 /*
 226  * Write a chunk to disk, handling errors, interrupted writes, etc.
 227  *
 228  * If there is an IO error hit during the write, it is possible that
 229  * this will just show up as a short write, and a subsequent write
 230  * will return the actual error.  We want to continue in the face of
 231  * minor media errors so that we can validate the whole device if
 232  * possible, but if there are many errors we don't want to loop forever.
 233  *
 234  * The error count will be returned upon exit to ensure that the
 235  * media errors are detected even if nobody is looking at the output.
 236  *
 237  * Returns 0 on success, or -ve errno on failure.
 238  */
 239 int write_retry(int fd, const char *chunk_buf, size_t nrequested,
 240                 unsigned long long offset, const char *file)
 241 {
 242         long nwritten;
 243
 244 retry:
 245         nwritten = write(fd, chunk_buf, nrequested);
 246         if (nwritten < 0) {
 247                 if (errno != ENOSPC) {
 248                         fprintf(stderr, "\n%s: write %s@%llu+%zi failed: %s\n",
 249                                 progname, file, offset, nrequested,
 250                                 strerror(errno));
 251                         if (error_count++ < 100)
 252                                 return 0;
 253                 }
 254                 return -errno;
 255         }
 256         if (nwritten < nrequested) {
 257                 fprintf(stderr, "\n%s: write %s@%llu+%zi short: %ld written\n",
 258                         progname, file, offset, nrequested, nwritten);
 259                 offset += nwritten;
 260                 chunk_buf += nwritten;
 261                 nrequested -= nwritten;
 262                 goto retry;
 263         }
 264
 265         return 0;
 266 }
 267
 268 /*
 269  * write_chunks: write the chunk_buf on the device. The number of write
 270  * operations are based on the parameters write_end, offset, and chunksize.
 271  *
 272  * Returns 0 on success, or -ve error number on failure.
 273  */
 274 int write_chunks(int fd, unsigned long long offset,unsigned long long write_end,
 275                  char *chunk_buf, size_t chunksize, const time_t time_st,
 276                  const ino_t inode_st, const char *file)
 277 {
 278         unsigned long long stride;
 279
 280         stride = full ? chunksize : (ONE_GB - chunksize);
 281         for (offset = offset & ~(chunksize - 1); offset < write_end;
 282              offset += stride) {
 283                 int ret;
 284
 285                 if (lseek64(fd, offset, SEEK_SET) == -1) {
 286                         fprintf(stderr, "\n%s: lseek64(%s+%llu) failed: %s\n",
 287                                 progname, file, offset, strerror(errno));
 288                         return -errno;
 289                 }
 290                 if (offset + chunksize > write_end)
 291                         chunksize = write_end - offset;
 292                 if (!full && offset > chunksize) {
 293                         fill_chunk(chunk_buf, chunksize, offset, time_st,
 294                                    inode_st);
 295                         ret = write_retry(fd, chunk_buf, chunksize,offset,file);
 296                         if (ret < 0)
 297                                 return ret;
 298                         offset += chunksize;
 299                         if (offset + chunksize > write_end)
 300                                 chunksize = write_end - offset;
 301                 }
 302                 fill_chunk(chunk_buf, chunksize, offset, time_st, inode_st);
 303                 ret = write_retry(fd, chunk_buf, chunksize, offset, file);
 304                 if (ret < 0)
 305                         return ret;
 306         }
 307         return 0;
 308 }
 309
 310 /*
 311  * read_chunk: reads the chunk_buf from the device. The number of read
 312  * operations are based on the parameters read_end, offset, and chunksize.
 313  */
 314 int read_chunks(int fd, unsigned long long offset, unsigned long long read_end,
 315                 char *chunk_buf, size_t chunksize, const time_t time_st,
 316                 const ino_t inode_st, const char *file)
 317 {
 318         unsigned long long stride;
 319
 320         stride = full ? chunksize : (ONE_GB - chunksize);
 321         for (offset = offset & ~(chunksize - 1); offset < read_end;
 322              offset += stride) {
 323                 ssize_t nread;
 324
 325                 if (lseek64(fd, offset, SEEK_SET) == -1) {
 326                         fprintf(stderr, "\n%s: lseek64(%s+%llu) failed: %s\n",
 327                                 progname, file, offset, strerror(errno));
 328                         return 1;
 329                 }
 330                 if (offset + chunksize > read_end)
 331                         chunksize = read_end - offset;
 332
 333                 if (!full && offset > chunksize) {
 334                         nread = read(fd, chunk_buf, chunksize);
 335                         if (nread < 0) {
 336                                 fprintf(stderr,"\n%s: read %s@%llu+%zi failed: "
 337                                         "%s\n", progname, file, offset,
 338                                         chunksize, strerror(errno));
 339                                 error_count++;
 340                                 return 1;
 341                         }
 342                         if (nread < chunksize) {
 343                                 fprintf(stderr, "\n%s: read %s@%llu+%zi short: "
 344                                         "%zi read\n", progname, file, offset,
 345                                         chunksize, nread);
 346                                 error_count++;
 347                         }
 348                         if (verify_chunk(chunk_buf, nread, offset, time_st,
 349                                          inode_st, file) != 0) {
 350                                 return 1;
 351                         }
 352                         offset += chunksize;
 353
 354                         /* Need to reset position after read error */
 355                         if (nread < chunksize &&
 356                             lseek64(fd, offset, SEEK_SET) == -1) {
 357                                 fprintf(stderr,
 358                                         "\n%s: lseek64(%s@%llu) failed: %s\n",
 359                                         progname, file, offset,strerror(errno));
 360                                 return 1;
 361                         }
 362                         if (offset + chunksize >= read_end)
 363                                 chunksize = read_end - offset;
 364                 }
 365                 nread = read(fd, chunk_buf, chunksize);
 366                 if (nread < 0) {
 367                         fprintf(stderr, "\n%s: read %s@%llu+%zi failed: %s\n",
 368                                 progname, file, offset, chunksize,
 369                                 strerror(errno));
 370                         error_count++;
 371                         return 1;
 372                 }
 373                 if (nread < chunksize) {
 374                         fprintf(stderr, "\n%s: read %s@%llu+%zi short: "
 375                                 "%zi read\n", progname, file, offset,
 376                                 chunksize, nread);
 377                         error_count++;
 378                 }
 379
 380                 if (verify_chunk(chunk_buf, nread, offset, time_st,
 381                                  inode_st, file) != 0) {
 382                         return 1;
 383                 }
 384         }
 385         return 0;
 386 }
 387
 388 /*
 389  * new_file: prepares new filename using file counter and current dir.
 390  */
 391 char *new_file(char *tempfile, char *cur_dir, int file_num)
 392 {
 393         sprintf(tempfile, "%s/file%03d", cur_dir, file_num);
 394         return tempfile;
 395 }
 396
 397 /*
 398  * new_dir: prepares new dir name using dir counters.
 399  */
 400 char *new_dir(char *tempdir, int dir_num)
 401 {
 402         sprintf(tempdir, "%s/dir%05d", testdir, dir_num);
 403         return tempdir;
 404 }
 405
 406 /*
 407  * calc_total_bytes: calculates total bytes that need to be
 408  * written into or read from the filesystem.
 409  */
 410 static unsigned long long calc_total_bytes(const char *op)
 411 {
 412         unsigned long long total_bytes = 0;
 413         struct statfs64 statbuf;
 414
 415         if (full) {
 416                 if (statfs64(testdir, &statbuf) == 0) {
 417                         if (strcmp(op, "write") == 0)
 418                                 total_bytes = (unsigned long long)
 419                                         (statbuf.f_bavail * statbuf.f_bsize);
 420                         else if (strcmp(op, "read") == 0)
 421                                 total_bytes = (unsigned long long)
 422                                         (statbuf.f_blocks * statbuf.f_bsize);
 423                         else {
 424                                 fprintf(stderr, "\n%s: invalid operation: %s\n",
 425                                         progname, op);
 426                                 return -1;
 427                         }
 428                 } else {
 429                         fprintf(stderr, "\n%s: unable to stat %s: %s\n",
 430                                 progname, testdir, strerror(errno));
 431                         return -errno;
 432                 }
 433         } else {
 434                 total_bytes = num_dirs * files_in_dir * file_size;
 435         }
 436
 437         return total_bytes;
 438 }
 439
 440 /*
 441  * show_rate: displays the current read/write file name and performance,
 442  * along with an estimate of how long the whole read/write operation
 443  * will continue.
 444  */
 445 void show_rate(char *op, char *filename, const struct timeval *start_time,
 446                const unsigned long long total_bytes,
 447                const unsigned long long curr_bytes)
 448 {
 449         static struct timeval last_time;
 450         static unsigned long long last_bytes;
 451         static char last_op;
 452         struct timeval curr_time;
 453         double curr_delta, overall_delta, curr_rate, overall_rate;
 454         double total_time, remain_time;
 455         int remain_hours, remain_minutes, remain_seconds;
 456
 457         if (last_time.tv_sec == 0)
 458                 last_time = *start_time;
 459
 460         if (last_op != op[0]) {
 461                 last_bytes = 0;
 462                 last_time = *start_time;
 463                 last_op = op[0];
 464         }
 465
 466         gettimeofday(&curr_time, NULL);
 467
 468         curr_delta = (curr_time.tv_sec - last_time.tv_sec) +
 469                 (double)(curr_time.tv_usec - last_time.tv_usec) / 1000000;
 470
 471         overall_delta = (curr_time.tv_sec - start_time->tv_sec) +
 472                 (double)(curr_time.tv_usec - start_time->tv_usec) / 1000000;
 473
 474         curr_rate = (curr_bytes - last_bytes) / curr_delta;
 475         overall_rate = curr_bytes / overall_delta;
 476
 477         if (curr_rate == 0) {
 478                 last_time = curr_time;
 479                 return;
 480         }
 481         total_time = total_bytes / curr_rate;
 482         remain_time = total_time - overall_delta;
 483
 484         remain_hours = remain_time / 3600;
 485         remain_minutes = (remain_time - remain_hours * 3600) / 60;
 486         remain_seconds = (remain_time - remain_hours * 3600 -
 487                 remain_minutes * 60);
 488
 489         if (curr_delta > 4 || verbose > 2) {
 490                 if (isatty_flag)
 491                         printf("\r");
 492
 493                 printf("%s filename: %s, current %5g MB/s, overall %5g MB/s, "
 494                        "est %u:%u:%u left", op, filename,
 495                        curr_rate / ONE_MB, overall_rate / ONE_MB,
 496                        remain_hours, remain_minutes, remain_seconds);
 497
 498                 if (isatty_flag)
 499                         fflush(stdout);
 500                 else
 501                         printf("\n");
 502         }
 503
 504         last_time = curr_time;
 505         last_bytes = curr_bytes;
 506 }
 507
 508 /*
 509  * dir_write: This function writes directories and files on device.
 510  * it works for both full and partial modes.
 511  */
 512 static int dir_write(char *chunk_buf, size_t chunksize,
 513                      time_t time_st, unsigned long dir_num)
 514 {
 515         char tempfile[PATH_MAX];
 516         char tempdir[PATH_MAX];
 517         FILE *countfile;
 518         struct stat64 file;
 519         int file_num = 999999999;
 520         ino_t inode_st = 0;
 521         struct timeval start_time;
 522         unsigned long long total_bytes;
 523         unsigned long long curr_bytes = 0;
 524         int rc = 0;
 525
 526 #ifdef HAVE_EXT2FS_EXT2FS_H
 527         if (!full && fsetflags(testdir, EXT2_TOPDIR_FL))
 528                 fprintf(stderr,
 529                         "\n%s: can't set TOPDIR_FL on %s: %s (ignoring)",
 530                         progname, testdir, strerror(errno));
 531 #endif
 532         countfile = fopen(filecount, "w");
 533         if (countfile == NULL) {
 534                 fprintf(stderr, "\n%s: creating %s failed :%s\n",
 535                         progname, filecount, strerror(errno));
 536                 return 5;
 537         }
 538         /* reserve space for the countfile */
 539         if (fprintf(countfile, "%lu", num_files) < 1 ||
 540             fflush(countfile) != 0) {
 541                 fprintf(stderr, "\n%s: writing %s failed :%s\n",
 542                         progname, filecount, strerror(errno));
 543                 rc = 6;
 544                 goto out;
 545         }
 546
 547         /* calculate total bytes that need to be written */
 548         total_bytes = calc_total_bytes("write");
 549         if (total_bytes <= 0) {
 550                 fprintf(stderr, "\n%s: unable to calculate total bytes\n",
 551                         progname);
 552                 rc = 7;
 553                 goto out;
 554         }
 555
 556         if (!full && (dir_num != 0))
 557                 total_bytes -= dir_num * files_in_dir * file_size;
 558
 559         gettimeofday(&start_time, NULL);
 560         for (; dir_num < num_dirs; num_files++, file_num++) {
 561                 int fd, ret;
 562
 563                 if (file_num >= files_in_dir) {
 564                         if (dir_num == num_dirs - 1)
 565                                 break;
 566
 567                         file_num = 0;
 568                         if (mkdir(new_dir(tempdir, dir_num), dirmode) < 0) {
 569                                 if (errno == ENOSPC)
 570                                         break;
 571                                 if (errno != EEXIST) {
 572                                         fprintf(stderr, "\n%s: mkdir %s : %s\n",
 573                                                 progname, tempdir,
 574                                                 strerror(errno));
 575                                         rc = 1;
 576                                         goto out;
 577                                 }
 578                         }
 579                         dir_num++;
 580                 }
 581
 582                 fd = open_file(new_file(tempfile, tempdir, file_num),
 583                                O_WRONLY | O_CREAT | O_TRUNC | O_LARGEFILE);
 584                 if (fd >= 0) {
 585                         if (fstat64(fd, &file) == 0) {
 586                                 inode_st = file.st_ino;
 587                         } else {
 588                                 fprintf(stderr, "\n%s: write stat '%s': %s",
 589                                         progname, tempfile, strerror(errno));
 590                                 close(fd);
 591                                 break;
 592                         }
 593                 } else {
 594                         break;
 595                 }
 596
 597                 ret = write_chunks(fd, 0, file_size, chunk_buf, chunksize,
 598                                    time_st, inode_st, tempfile);
 599                 close(fd);
 600                 if (ret < 0) {
 601                         if (ret != -ENOSPC) {
 602                                 rc = 1;
 603                                 goto out;
 604                         }
 605                         curr_bytes = total_bytes;
 606                         break;
 607                 }
 608
 609                 curr_bytes += file_size;
 610                 if (verbose > 1)
 611                         show_rate("write", tempfile, &start_time,
 612                                   total_bytes, curr_bytes);
 613
 614                 fseek(countfile, 0, SEEK_SET);
 615                 if (fprintf(countfile, "%lu", num_files) < 1 ||
 616                     fflush(countfile) != 0) {
 617                         fprintf(stderr, "\n%s: writing %s failed :%s\n",
 618                                 progname, filecount, strerror(errno));
 619                 }
 620         }
 621
 622         if (verbose) {
 623                 verbose++;
 624                 show_rate("write", tempfile, &start_time,
 625                           total_bytes, curr_bytes);
 626                 printf("\nwrite complete\n");
 627                 verbose--;
 628         }
 629
 630 out:
 631         fclose(countfile);
 632
 633         return rc;
 634 }
 635
 636 /*
 637  * dir_read: This function reads directories and files on device.
 638  * it works for both full and partial modes.
 639  */
 640 static int dir_read(char *chunk_buf, size_t chunksize,
 641                     time_t time_st, unsigned long dir_num)
 642 {
 643         char tempfile[PATH_MAX];
 644         char tempdir[PATH_MAX];
 645         unsigned long count = 0;
 646         struct stat64 file;
 647         int file_num = 0;
 648         ino_t inode_st = 0;
 649         struct timeval start_time;
 650         unsigned long long total_bytes;
 651         unsigned long long curr_bytes = 0;
 652
 653         /* calculate total bytes that need to be read */
 654         total_bytes = calc_total_bytes("read");
 655         if (total_bytes <= 0) {
 656                 fprintf(stderr, "\n%s: unable to calculate total bytes\n",
 657                         progname);
 658                 return 1;
 659         }
 660
 661         if (dir_num != 0)
 662                 total_bytes -= dir_num * files_in_dir * file_size;
 663
 664         gettimeofday(&start_time, NULL);
 665         for (count = 0; count < num_files && dir_num < num_dirs; count++) {
 666                 int fd, ret;
 667
 668                 if (file_num == 0) {
 669                         if (dir_num == num_dirs - 1)
 670                                 break;
 671
 672                         new_dir(tempdir, dir_num);
 673                         dir_num++;
 674                 }
 675
 676                 fd = open_file(new_file(tempfile, tempdir, file_num),
 677                                O_RDONLY | O_LARGEFILE);
 678                 if (fd >= 0) {
 679                         if (fstat64(fd, &file) == 0) {
 680                                 inode_st = file.st_ino;
 681                         } else {
 682                                 fprintf(stderr, "\n%s: read stat '%s': %s\n",
 683                                         progname, tempfile, strerror(errno));
 684                                 close(fd);
 685                                 return 1;
 686                         }
 687                 } else {
 688                         break;
 689                 }
 690
 691                 if (count == num_files)
 692                         file_size = file.st_size;
 693                 ret = read_chunks(fd, 0, file_size, chunk_buf, chunksize,
 694                                   time_st, inode_st, tempfile);
 695                 close(fd);
 696                 if (ret)
 697                         return 1;
 698
 699                 curr_bytes += file_size;
 700                 if (verbose > 1)
 701                         show_rate("read", tempfile, &start_time,
 702                                   total_bytes, curr_bytes);
 703
 704                 if (++file_num >= files_in_dir)
 705                         file_num = 0;
 706         }
 707         if (verbose > 1){
 708                 verbose++;
 709                 show_rate("read", tempfile, &start_time,
 710                           total_bytes, curr_bytes);
 711                 printf("\nread complete\n");
 712                 verbose--;
 713         }
 714         return 0;
 715 }
 716
 717 int main(int argc, char **argv)
 718 {
 719         time_t time_st = 0;             /* Default timestamp */
 720         size_t chunksize = ONE_MB;      /* IO chunk size(defailt=1MB) */
 721         char *chunk_buf;                /* chunk buffer */
 722         int error = 0;
 723         FILE *countfile = NULL;
 724         unsigned long dir_num = 0, dir_num_orig = 0;/* starting directory */
 725         int c;
 726
 727         progname = strrchr(argv[0], '/') ? strrchr(argv[0], '/') + 1 : argv[0];
 728         while ((c = getopt_long(argc, argv, "c:hlo:pqrs:t:vw",
 729                                       long_opts, NULL)) != -1) {
 730                 switch (c) {
 731                 case 'c':
 732                         chunksize = strtoul(optarg, NULL, 0) * ONE_MB;
 733                         if (chunksize == 0) {
 734                                 fprintf(stderr, "%s: bad chunk size '%s'\n",
 735                                         optarg, progname);
 736                                 return -1;
 737                         }
 738                         break;
 739                 case 'l':
 740                         full = 1;
 741                         break;
 742                 case 'o': /* offset */
 743                         dir_num = strtoul(optarg, NULL, 0);
 744                         break;
 745                 case 'p':
 746                         file_size = ONE_MB;
 747                         chunksize = ONE_MB;
 748                         files_in_dir = 1;
 749                         full = 0;
 750                         break;
 751                 case 'q':
 752                         verbose = 0;
 753                         break;
 754                 case 'r':
 755                         readoption = 1;
 756                         break;
 757                 case 's':
 758                         file_size = strtoul(optarg, NULL, 0) * ONE_MB;
 759                         if (file_size == 0) {
 760                                 fprintf(stderr, "%s: bad file size '%s'\n",
 761                                         optarg, progname);
 762                                 return -1;
 763                         }
 764                         break;
 765                 case 't':
 766                         time_st = (time_t)strtoul(optarg, NULL, 0);
 767                         break;
 768                 case 'v':
 769                         verbose++;
 770                         break;
 771                 case 'w':
 772                         writeoption = 1;
 773                         break;
 774
 775                 case 'h':
 776                 default:
 777                         usage(1);
 778                         return 0;
 779                 }
 780         }
 781         testdir = argv[optind];
 782
 783         if (!testdir) {
 784                 fprintf(stderr, "%s: pathname not given\n", progname);
 785                 usage(1);
 786                 return -1;
 787         }
 788         if (!readoption && !writeoption) {
 789                 readoption = 1;
 790                 writeoption = 1;
 791         }
 792         if (!time_st)
 793                 (void) time(&time_st);
 794         printf("Timestamp: %lu\n", (unsigned long )time_st);
 795         isatty_flag = isatty(STDOUT_FILENO);
 796
 797         if (!full) {
 798 #ifdef HAVE_EXT2FS_EXT2FS_H
 799                 struct mntent *tempmnt;
 800                 FILE *fp = NULL;
 801                 ext2_filsys fs;
 802
 803                 if ((fp = setmntent("/etc/mtab", "r")) == NULL){
 804                         fprintf(stderr, "%s: fail to open /etc/mtab in read"
 805                                 "mode :%s\n", progname, strerror(errno));
 806                         goto guess;
 807                 }
 808
 809                 /* find device name using filesystem */
 810                 while ((tempmnt = getmntent(fp)) != NULL) {
 811                         if (strcmp(tempmnt->mnt_dir, testdir) == 0)
 812                                 break;
 813                 }
 814
 815                 if (tempmnt == NULL) {
 816                         fprintf(stderr, "%s: no device found for '%s'\n",
 817                                 progname, testdir);
 818                         endmntent(fp);
 819                         goto guess;
 820                 }
 821
 822                 if (ext2fs_open(tempmnt->mnt_fsname, 0, 0, 0,
 823                                 unix_io_manager, &fs)) {
 824                         fprintf(stderr, "%s: unable to open ext3 fs on '%s'\n",
 825                                 progname, testdir);
 826                         endmntent(fp);
 827                         goto guess;
 828                 }
 829                 endmntent(fp);
 830
 831                 num_dirs = (fs->super->s_blocks_count +
 832                             fs->super->s_blocks_per_group - 1) /
 833                         fs->super->s_blocks_per_group;
 834                 if (verbose)
 835                         printf("ext3 block groups: %u, fs blocks: %u "
 836                                "blocks per group: %u\n",
 837                                num_dirs, fs->super->s_blocks_count,
 838                                fs->super->s_blocks_per_group);
 839                 ext2fs_close(fs);
 840 #else
 841                 goto guess;
 842 #endif
 843                 if (0) { /* ugh */
 844                         struct statfs64 statbuf;
 845 guess:
 846                         if (statfs64(testdir, &statbuf) == 0) {
 847                                 num_dirs = (long long)statbuf.f_blocks *
 848                                         statbuf.f_bsize / (128ULL << 20);
 849                                 if (verbose)
 850                                         printf("dirs: %u, fs blocks: %llu\n",
 851                                                num_dirs,
 852                                                (long long)statbuf.f_blocks);
 853                         } else {
 854                                 fprintf(stderr, "%s: unable to stat '%s': %s\n",
 855                                         progname, testdir, strerror(errno));
 856                                 if (verbose)
 857                                         printf("dirs: %u\n", num_dirs);
 858                         }
 859                 }
 860         }
 861         chunk_buf = (char *)calloc(chunksize, 1);
 862         if (chunk_buf == NULL) {
 863                 fprintf(stderr, "Memory allocation failed for chunk_buf\n");
 864                 return 4;
 865         }
 866         snprintf(filecount, sizeof(filecount), "%s/%s.filecount",
 867                  testdir, progname);
 868         if (writeoption) {
 869                 (void)mkdir(testdir, dirmode);
 870
 871                 unlink(filecount);
 872                 if (dir_num != 0) {
 873                         num_files = dir_num * files_in_dir;
 874                         if (verbose)
 875                                 printf("\n%s: %lu files already written\n",
 876                                        progname, num_files);
 877                 }
 878                 if (dir_write(chunk_buf, chunksize, time_st, dir_num)) {
 879                         error = 3;
 880                         goto out;
 881                 }
 882                 dir_num = dir_num_orig;
 883         }
 884         if (readoption) {
 885                 if (!writeoption) {
 886                         countfile = fopen(filecount, "r");
 887                         if (countfile == NULL ||
 888                             fscanf(countfile, "%lu", &num_files) != 1 ||
 889                             num_files == 0) {
 890                                 fprintf(stderr, "\n%s: reading %s failed :%s\n",
 891                                         progname, filecount, strerror(errno));
 892                                 num_files = num_dirs * files_in_dir;
 893                         } else {
 894                                 num_files -= (dir_num * files_in_dir);
 895                         }
 896                         if (countfile)
 897                                 fclose(countfile);
 898                 }
 899                 if (dir_read(chunk_buf, chunksize, time_st, dir_num)) {
 900                         fprintf(stderr, "\n%s: Data verification failed\n",
 901                                 progname) ;
 902                         error = 2;
 903                         goto out;
 904                 }
 905         }
 906         error = error_count;
 907 out:
 908         free(chunk_buf);
 909         return error;
 910 }