lustre/utils/llverfs.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  *
  32  * Copyright (c) 2011 Whamcloud, Inc.
  33  *
  34  */
  35 /*
  36  * This file is part of Lustre, http://www.lustre.org/
  37  * Lustre is a trademark of Sun Microsystems, Inc.
  38  *
  39  * lustre/utils/llverfs.c
  40  *
  41  * Filesystem Verification Tool.
  42  * This program tests the correct operation of large filesystems and
  43  * the underlying block storage device(s).
  44  * This tool have two working modes
  45  * 1. full mode
  46  * 2. partial mode
  47  *
  48  * In full mode, the program creates a subdirectory in the test
  49  * filesystem, writes n(files_in_dir, default=32) large(4GB) files to
  50  * the directory with the test pattern at the start of each 4kb block.
  51  * The test pattern contains timestamp, relative file offset and per
  52  * file unique identifier(inode number).  This continues until the
  53  * whole filesystem is full and then the tool verifies that the data
  54  * in all of the test files is correct.
  55  *
  56  * In partial mode, the tool creates test directories with the
  57  * EXT3_TOPDIR_FL flag set (if supported) to spread the directory data
  58  * around the block device instead of localizing it in a single place.
  59  * The number of directories equals to the number of block groups in the
  60  * filesystem (e.g. 65536 directories for 8TB ext3/ext4 filesystem) and
  61  * then writes a single 1MB file in each directory. The tool then verifies
  62  * that the data in each file is correct.
  63  */
  64
  65 #ifndef _GNU_SOURCE
  66 #define _GNU_SOURCE
  67 #endif
  68 #ifndef LUSTRE_UTILS
  69 #define LUSTRE_UTILS
  70 #endif
  71 #ifndef _LARGEFILE64_SOURCE
  72 #define _LARGEFILE64_SOURCE
  73 #endif
  74 #ifndef _FILE_OFFSET_BITS
  75 #define _FILE_OFFSET_BITS 64
  76 #endif
  77
  78 #include <features.h>
  79 #include <stdlib.h>
  80 #include <stdio.h>
  81 #include <string.h>
  82 #include <ctype.h>
  83 #include <fcntl.h>
  84 #include <unistd.h>
  85 #include <limits.h>
  86 #include <errno.h>
  87 #include <fcntl.h>
  88 #include <getopt.h>
  89 #include <time.h>
  90 #include <dirent.h>
  91 #include <mntent.h>
  92 #include <sys/types.h>
  93 #include <sys/stat.h>
  94 #include <sys/vfs.h>
  95 #include <sys/time.h>
  96 #include <gnu/stubs.h>
  97 #include <gnu/stubs.h>
  98
  99 #ifdef HAVE_EXT2FS_EXT2FS_H
 100 #  include <e2p/e2p.h>
 101 #  include <ext2fs/ext2fs.h>
 102 #endif
 103
 104 #define ONE_MB (1024 * 1024)
 105 #define ONE_GB ((unsigned long long)(1024 * 1024 * 1024))
 106 #define BLOCKSIZE 4096
 107
 108 /* Structure for writing test pattern */
 109 struct block_data {
 110         unsigned long long bd_offset;
 111         unsigned long long bd_time;
 112         unsigned long long bd_inode;
 113 };
 114 static char *progname;              /* name by which this program was run. */
 115 static unsigned verbose = 1;        /* prints offset in kB, operation rate */
 116 static int readoption;              /* run test in read-only (verify) mode */
 117 static int writeoption;             /* run test in write_only mode */
 118 char *testdir;                      /* name of device to be tested. */
 119 static unsigned full = 1;           /* flag to full check */
 120 static int error_count;             /* number of IO errors hit during run */
 121 char filecount[PATH_MAX];           /* file with total number of files written*/
 122 static unsigned long num_files;     /* Total number of files for read/write */
 123 static loff_t file_size = 4*ONE_GB; /* Size of each file */
 124 static unsigned files_in_dir = 32;  /* number of files in each directioy */
 125 static unsigned num_dirs = 30000;   /* total number of directories */
 126 const int dirmode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
 127 static int isatty_flag;
 128 static int perms =  S_IRWXU | S_IRGRP | S_IROTH;
 129
 130 static struct option const longopts[] =
 131 {
 132         { "chunksize", required_argument, 0, 'c' },
 133         { "help", no_argument, 0, 'h' },
 134         { "offset", required_argument, 0, 'o' },
 135         { "long", no_argument, 0, 'l' },
 136         { "full", no_argument, 0, 'l' },
 137         { "partial", required_argument, 0, 'p' },
 138         { "quiet", required_argument, 0, 'q' },
 139         { "read", no_argument, 0, 'r' },
 140         { "filesize", no_argument, 0, 's' },
 141         { "timestamp", required_argument, 0, 't' },
 142         { "verbose", no_argument, 0, 'v' },
 143         { "write", no_argument, 0, 'w' },
 144         { 0, 0, 0, 0}
 145 };
 146
 147 /*
 148  * Usages: displays help information, whenever user supply --help option in
 149  * command or enters incorrect command line.
 150  */
 151 void usage(int status)
 152 {
 153         if (status != 0) {
 154                 printf("\nUsage: %s [OPTION]... <filesystem path> ...\n",
 155                        progname);
 156                 printf("Filesystem verification tool.\n"
 157                        "\t-t {seconds}, --timestamp,  set test time"
 158                        "(default=current time())\n"
 159                        "\t-o {offset}, --offset, directory starting offset"
 160                        " from which tests should start\n"
 161                        "\t-r, --read, run in verify mode\n"
 162                        "\t-w, --write, run in test-pattern mode, default=rw\n"
 163                        "\t-v, --verbose\n"
 164                        "\t-p, --partial, for partial check (1MB files)\n"
 165                        "\t-l, --long, --full check (4GB file with 4k blocks)\n"
 166                        "\t-c, --chunksize, IO chunk size in MB (default=1)\n"
 167                        "\t-s, --filesize, file size in MB (default=4096)\n"
 168                        "\t-h, --help, display this help and exit\n");
 169         }
 170         exit(status);
 171 }
 172
 173 /*
 174  * open_file: Opens file in specified mode and returns fd.
 175  */
 176 static int open_file(const char *file, int flag)
 177 {
 178         int fd = open(file, flag, perms);
 179         if (fd < 0) {
 180                 fprintf(stderr, "\n%s: Open '%s' failed:%s\n",
 181                         progname, file, strerror(errno));
 182         }
 183         return (fd);
 184 }
 185
 186 /*
 187  * Verify_chunk: Verifies test pattern in each 4kB (BLOCKSIZE) is correct.
 188  * Returns 0 if test offset and timestamp is correct otherwise 1.
 189  */
 190 int verify_chunk(char *chunk_buf, const size_t chunksize,
 191                  unsigned long long chunk_off, const unsigned long long time_st,
 192                  const unsigned long long inode_st, const char *file)
 193 {
 194         struct block_data *bd;
 195         char *chunk_end;
 196
 197         for (chunk_end = chunk_buf + chunksize - sizeof(*bd);
 198              (char *)chunk_buf < chunk_end;
 199              chunk_buf += BLOCKSIZE, chunk_off += BLOCKSIZE) {
 200                 bd = (struct block_data *)chunk_buf;
 201                 if ((bd->bd_offset == chunk_off) && (bd->bd_time == time_st) &&
 202                     (bd->bd_inode == inode_st))
 203                         continue;
 204                 fprintf(stderr, "\n%s: verify %s failed offset/timestamp/inode "
 205                         "%llu/%llu/%llu: found %llu/%llu/%llu instead\n",
 206                         progname, file, chunk_off, time_st, inode_st,
 207                         bd->bd_offset, bd->bd_time, bd->bd_inode);
 208                 return 1;
 209         }
 210         return 0;
 211 }
 212
 213 /*
 214  * fill_chunk: Fills the chunk with current or user specified timestamp
 215  * and offset. The test pattern is filled at the beginning of
 216  * each 4kB(BLOCKSIZE) blocks in chunk_buf.
 217  */
 218 void fill_chunk(char *chunk_buf, size_t chunksize, loff_t chunk_off,
 219                 const time_t time_st, const ino_t inode_st)
 220 {
 221         struct block_data *bd;
 222         char *chunk_end;
 223
 224         for (chunk_end = chunk_buf + chunksize - sizeof(*bd);
 225              (char *)chunk_buf < chunk_end;
 226              chunk_buf += BLOCKSIZE, chunk_off += BLOCKSIZE) {
 227                 bd = (struct block_data *)chunk_buf;
 228                 bd->bd_offset = chunk_off;
 229                 bd->bd_time = time_st;
 230                 bd->bd_inode = inode_st;
 231         }
 232 }
 233
 234 /*
 235  * Write a chunk to disk, handling errors, interrupted writes, etc.
 236  *
 237  * If there is an IO error hit during the write, it is possible that
 238  * this will just show up as a short write, and a subsequent write
 239  * will return the actual error.  We want to continue in the face of
 240  * minor media errors so that we can validate the whole device if
 241  * possible, but if there are many errors we don't want to loop forever.
 242  *
 243  * The error count will be returned upon exit to ensure that the
 244  * media errors are detected even if nobody is looking at the output.
 245  *
 246  * Returns 0 on success, or -ve errno on failure.
 247  */
 248 int write_retry(int fd, const char *chunk_buf, size_t nrequested,
 249                 unsigned long long offset, const char *file)
 250 {
 251         long nwritten;
 252
 253 retry:
 254         nwritten = write(fd, chunk_buf, nrequested);
 255         if (nwritten < 0) {
 256                 if (errno != ENOSPC) {
 257                         fprintf(stderr, "\n%s: write %s@%llu+%zi failed: %s\n",
 258                                 progname, file, offset, nrequested,
 259                                 strerror(errno));
 260                         if (error_count++ < 100)
 261                                 return 0;
 262                 }
 263                 return -errno;
 264         }
 265         if (nwritten < nrequested) {
 266                 fprintf(stderr, "\n%s: write %s@%llu+%zi short: %ld written\n",
 267                         progname, file, offset, nrequested, nwritten);
 268                 offset += nwritten;
 269                 chunk_buf += nwritten;
 270                 nrequested -= nwritten;
 271                 goto retry;
 272         }
 273
 274         return 0;
 275 }
 276
 277 /*
 278  * write_chunks: write the chunk_buf on the device. The number of write
 279  * operations are based on the parameters write_end, offset, and chunksize.
 280  *
 281  * Returns 0 on success, or -ve error number on failure.
 282  */
 283 int write_chunks(int fd, unsigned long long offset,unsigned long long write_end,
 284                  char *chunk_buf, size_t chunksize, const time_t time_st,
 285                  const ino_t inode_st, const char *file)
 286 {
 287         unsigned long long stride;
 288
 289         stride = full ? chunksize : (ONE_GB - chunksize);
 290         for (offset = offset & ~(chunksize - 1); offset < write_end;
 291              offset += stride) {
 292                 int ret;
 293
 294                 if (lseek64(fd, offset, SEEK_SET) == -1) {
 295                         fprintf(stderr, "\n%s: lseek64(%s+%llu) failed: %s\n",
 296                                 progname, file, offset, strerror(errno));
 297                         return -errno;
 298                 }
 299                 if (offset + chunksize > write_end)
 300                         chunksize = write_end - offset;
 301                 if (!full && offset > chunksize) {
 302                         fill_chunk(chunk_buf, chunksize, offset, time_st,
 303                                    inode_st);
 304                         ret = write_retry(fd, chunk_buf, chunksize,offset,file);
 305                         if (ret < 0)
 306                                 return ret;
 307                         offset += chunksize;
 308                         if (offset + chunksize > write_end)
 309                                 chunksize = write_end - offset;
 310                 }
 311                 fill_chunk(chunk_buf, chunksize, offset, time_st, inode_st);
 312                 ret = write_retry(fd, chunk_buf, chunksize, offset, file);
 313                 if (ret < 0)
 314                         return ret;
 315         }
 316         return 0;
 317 }
 318
 319 /*
 320  * read_chunk: reads the chunk_buf from the device. The number of read
 321  * operations are based on the parameters read_end, offset, and chunksize.
 322  */
 323 int read_chunks(int fd, unsigned long long offset, unsigned long long read_end,
 324                 char *chunk_buf, size_t chunksize, const time_t time_st,
 325                 const ino_t inode_st, const char *file)
 326 {
 327         unsigned long long stride;
 328
 329         stride = full ? chunksize : (ONE_GB - chunksize);
 330         for (offset = offset & ~(chunksize - 1); offset < read_end;
 331              offset += stride) {
 332                 ssize_t nread;
 333
 334                 if (lseek64(fd, offset, SEEK_SET) == -1) {
 335                         fprintf(stderr, "\n%s: lseek64(%s+%llu) failed: %s\n",
 336                                 progname, file, offset, strerror(errno));
 337                         return 1;
 338                 }
 339                 if (offset + chunksize > read_end)
 340                         chunksize = read_end - offset;
 341
 342                 if (!full && offset > chunksize) {
 343                         nread = read(fd, chunk_buf, chunksize);
 344                         if (nread < 0) {
 345                                 fprintf(stderr,"\n%s: read %s@%llu+%zi failed: "
 346                                         "%s\n", progname, file, offset,
 347                                         chunksize, strerror(errno));
 348                                 error_count++;
 349                                 return 1;
 350                         }
 351                         if (nread < chunksize) {
 352                                 fprintf(stderr, "\n%s: read %s@%llu+%zi short: "
 353                                         "%zi read\n", progname, file, offset,
 354                                         chunksize, nread);
 355                                 error_count++;
 356                         }
 357                         if (verify_chunk(chunk_buf, nread, offset, time_st,
 358                                          inode_st, file) != 0) {
 359                                 return 1;
 360                         }
 361                         offset += chunksize;
 362
 363                         /* Need to reset position after read error */
 364                         if (nread < chunksize &&
 365                             lseek64(fd, offset, SEEK_SET) == -1) {
 366                                 fprintf(stderr,
 367                                         "\n%s: lseek64(%s@%llu) failed: %s\n",
 368                                         progname, file, offset,strerror(errno));
 369                                 return 1;
 370                         }
 371                         if (offset + chunksize >= read_end)
 372                                 chunksize = read_end - offset;
 373                 }
 374                 nread = read(fd, chunk_buf, chunksize);
 375                 if (nread < 0) {
 376                         fprintf(stderr, "\n%s: read %s@%llu+%zi failed: %s\n",
 377                                 progname, file, offset, chunksize,
 378                                 strerror(errno));
 379                         error_count++;
 380                         return 1;
 381                 }
 382                 if (nread < chunksize) {
 383                         fprintf(stderr, "\n%s: read %s@%llu+%zi short: "
 384                                 "%zi read\n", progname, file, offset,
 385                                 chunksize, nread);
 386                         error_count++;
 387                 }
 388
 389                 if (verify_chunk(chunk_buf, nread, offset, time_st,
 390                                  inode_st, file) != 0) {
 391                         return 1;
 392                 }
 393         }
 394         return 0;
 395 }
 396
 397 /*
 398  * new_file: prepares new filename using file counter and current dir.
 399  */
 400 char *new_file(char *tempfile, char *cur_dir, int file_num)
 401 {
 402         sprintf(tempfile, "%s/file%03d", cur_dir, file_num);
 403         return tempfile;
 404 }
 405
 406 /*
 407  * new_dir: prepares new dir name using dir counters.
 408  */
 409 char *new_dir(char *tempdir, int dir_num)
 410 {
 411         sprintf(tempdir, "%s/dir%05d", testdir, dir_num);
 412         return tempdir;
 413 }
 414
 415 /*
 416  * calc_total_bytes: calculates total bytes that need to be
 417  * written into or read from the filesystem.
 418  */
 419 static unsigned long long calc_total_bytes(const char *op)
 420 {
 421         unsigned long long total_bytes = 0;
 422         struct statfs64 statbuf;
 423
 424         if (full) {
 425                 if (statfs64(testdir, &statbuf) == 0) {
 426                         if (strcmp(op, "write") == 0)
 427                                 total_bytes = (unsigned long long)
 428                                         (statbuf.f_bavail * statbuf.f_bsize);
 429                         else if (strcmp(op, "read") == 0)
 430                                 total_bytes = (unsigned long long)
 431                                         (statbuf.f_blocks * statbuf.f_bsize);
 432                         else {
 433                                 fprintf(stderr, "\n%s: invalid operation: %s\n",
 434                                         progname, op);
 435                                 return -1;
 436                         }
 437                 } else {
 438                         fprintf(stderr, "\n%s: unable to stat %s: %s\n",
 439                                 progname, testdir, strerror(errno));
 440                         return -errno;
 441                 }
 442         } else {
 443                 total_bytes = num_dirs * files_in_dir * file_size;
 444         }
 445
 446         return total_bytes;
 447 }
 448
 449 /*
 450  * show_rate: displays the current read/write file name and performance,
 451  * along with an estimate of how long the whole read/write operation
 452  * will continue.
 453  */
 454 void show_rate(char *op, char *filename, const struct timeval *start_time,
 455                const unsigned long long total_bytes,
 456                const unsigned long long curr_bytes)
 457 {
 458         static struct timeval last_time;
 459         static unsigned long long last_bytes;
 460         static char last_op;
 461         struct timeval curr_time;
 462         double curr_delta, overall_delta, curr_rate, overall_rate;
 463         double total_time, remain_time;
 464         int remain_hours, remain_minutes, remain_seconds;
 465
 466         if (last_time.tv_sec == 0)
 467                 last_time = *start_time;
 468
 469         if (last_op != op[0]) {
 470                 last_bytes = 0;
 471                 last_time = *start_time;
 472                 last_op = op[0];
 473         }
 474
 475         gettimeofday(&curr_time, NULL);
 476
 477         curr_delta = (curr_time.tv_sec - last_time.tv_sec) +
 478                 (double)(curr_time.tv_usec - last_time.tv_usec) / 1000000;
 479
 480         overall_delta = (curr_time.tv_sec - start_time->tv_sec) +
 481                 (double)(curr_time.tv_usec - start_time->tv_usec) / 1000000;
 482
 483         curr_rate = (curr_bytes - last_bytes) / curr_delta;
 484         overall_rate = curr_bytes / overall_delta;
 485
 486         if (curr_rate == 0) {
 487                 last_time = curr_time;
 488                 return;
 489         }
 490         total_time = total_bytes / curr_rate;
 491         remain_time = total_time - overall_delta;
 492
 493         remain_hours = remain_time / 3600;
 494         remain_minutes = (remain_time - remain_hours * 3600) / 60;
 495         remain_seconds = (remain_time - remain_hours * 3600 -
 496                 remain_minutes * 60);
 497
 498         if (curr_delta > 4 || verbose > 2) {
 499                 if (isatty_flag)
 500                         printf("\r");
 501
 502                 printf("%s filename: %s, current %5g MB/s, overall %5g MB/s, "
 503                        "est %u:%u:%u left", op, filename,
 504                        curr_rate / ONE_MB, overall_rate / ONE_MB,
 505                        remain_hours, remain_minutes, remain_seconds);
 506
 507                 if (isatty_flag)
 508                         fflush(stdout);
 509                 else
 510                         printf("\n");
 511         }
 512
 513         last_time = curr_time;
 514         last_bytes = curr_bytes;
 515 }
 516
 517 /*
 518  * dir_write: This function writes directories and files on device.
 519  * it works for both full and partial modes.
 520  */
 521 static int dir_write(char *chunk_buf, size_t chunksize,
 522                      time_t time_st, unsigned long dir_num)
 523 {
 524         char tempfile[PATH_MAX];
 525         char tempdir[PATH_MAX];
 526         FILE *countfile;
 527         struct stat64 file;
 528         int file_num = 999999999;
 529         ino_t inode_st = 0;
 530         struct timeval start_time;
 531         unsigned long long total_bytes;
 532         unsigned long long curr_bytes = 0;
 533
 534 #ifdef HAVE_EXT2FS_EXT2FS_H
 535         if (!full && fsetflags(testdir, EXT2_TOPDIR_FL))
 536                 fprintf(stderr,
 537                         "\n%s: can't set TOPDIR_FL on %s: %s (ignoring)",
 538                         progname, testdir, strerror(errno));
 539 #endif
 540         countfile = fopen(filecount, "w");
 541         if (countfile == NULL) {
 542                 fprintf(stderr, "\n%s: creating %s failed :%s\n",
 543                         progname, filecount, strerror(errno));
 544                 return 5;
 545         }
 546         /* reserve space for the countfile */
 547         if (fprintf(countfile, "%lu", num_files) < 1 ||
 548             fflush(countfile) != 0) {
 549                 fprintf(stderr, "\n%s: writing %s failed :%s\n",
 550                         progname, filecount, strerror(errno));
 551                 return 6;
 552         }
 553
 554         /* calculate total bytes that need to be written */
 555         total_bytes = calc_total_bytes("write");
 556         if (total_bytes <= 0) {
 557                 fprintf(stderr, "\n%s: unable to calculate total bytes\n",
 558                         progname);
 559                 return 7;
 560         }
 561
 562         if (!full && (dir_num != 0))
 563                 total_bytes -= dir_num * files_in_dir * file_size;
 564
 565         gettimeofday(&start_time, NULL);
 566         for (; dir_num < num_dirs; num_files++, file_num++) {
 567                 int fd, ret;
 568
 569                 if (file_num >= files_in_dir) {
 570                         if (dir_num == num_dirs - 1)
 571                                 break;
 572
 573                         file_num = 0;
 574                         if (mkdir(new_dir(tempdir, dir_num), dirmode) < 0) {
 575                                 if (errno == ENOSPC)
 576                                         break;
 577                                 if (errno != EEXIST) {
 578                                         fprintf(stderr, "\n%s: mkdir %s : %s\n",
 579                                                 progname, tempdir,
 580                                                 strerror(errno));
 581                                         return 1;
 582                                 }
 583                         }
 584                         dir_num++;
 585                 }
 586
 587                 fd = open_file(new_file(tempfile, tempdir, file_num),
 588                                O_WRONLY | O_CREAT | O_TRUNC | O_LARGEFILE);
 589                 if (fd >= 0) {
 590                         if (fstat64(fd, &file) == 0) {
 591                                 inode_st = file.st_ino;
 592                         } else {
 593                                 fprintf(stderr, "\n%s: write stat '%s': %s",
 594                                         progname, tempfile, strerror(errno));
 595                                 close(fd);
 596                                 break;
 597                         }
 598                 } else {
 599                         break;
 600                 }
 601
 602                 ret = write_chunks(fd, 0, file_size, chunk_buf, chunksize,
 603                                    time_st, inode_st, tempfile);
 604                 close(fd);
 605                 if (ret < 0) {
 606                         if (ret != -ENOSPC)
 607                                 return 1;
 608                         curr_bytes = total_bytes;
 609                         break;
 610                 }
 611
 612                 curr_bytes += file_size;
 613                 if (verbose > 1)
 614                         show_rate("write", tempfile, &start_time,
 615                                   total_bytes, curr_bytes);
 616
 617                 fseek(countfile, 0, SEEK_SET);
 618                 if (fprintf(countfile, "%lu", num_files) < 1 ||
 619                     fflush(countfile) != 0) {
 620                         fprintf(stderr, "\n%s: writing %s failed :%s\n",
 621                                 progname, filecount, strerror(errno));
 622                 }
 623         }
 624         fclose(countfile);
 625
 626         if (verbose) {
 627                 verbose++;
 628                 show_rate("write", tempfile, &start_time,
 629                           total_bytes, curr_bytes);
 630                 printf("\nwrite complete\n");
 631                 verbose--;
 632         }
 633
 634         return 0;
 635 }
 636
 637 /*
 638  * dir_read: This function reads directories and files on device.
 639  * it works for both full and partial modes.
 640  */
 641 static int dir_read(char *chunk_buf, size_t chunksize,
 642                     time_t time_st, unsigned long dir_num)
 643 {
 644         char tempfile[PATH_MAX];
 645         char tempdir[PATH_MAX];
 646         unsigned long count = 0;
 647         struct stat64 file;
 648         int file_num = 0;
 649         ino_t inode_st = 0;
 650         struct timeval start_time;
 651         unsigned long long total_bytes;
 652         unsigned long long curr_bytes = 0;
 653
 654         /* calculate total bytes that need to be read */
 655         total_bytes = calc_total_bytes("read");
 656         if (total_bytes <= 0) {
 657                 fprintf(stderr, "\n%s: unable to calculate total bytes\n",
 658                         progname);
 659                 return 1;
 660         }
 661
 662         if (dir_num != 0)
 663                 total_bytes -= dir_num * files_in_dir * file_size;
 664
 665         gettimeofday(&start_time, NULL);
 666         for (count = 0; count < num_files && dir_num < num_dirs; count++) {
 667                 int fd, ret;
 668
 669                 if (file_num == 0) {
 670                         if (dir_num == num_dirs - 1)
 671                                 break;
 672
 673                         new_dir(tempdir, dir_num);
 674                         dir_num++;
 675                 }
 676
 677                 fd = open_file(new_file(tempfile, tempdir, file_num),
 678                                O_RDONLY | O_LARGEFILE);
 679                 if (fd >= 0) {
 680                         if (fstat64(fd, &file) == 0) {
 681                                 inode_st = file.st_ino;
 682                         } else {
 683                                 fprintf(stderr, "\n%s: read stat '%s': %s\n",
 684                                         progname, tempfile, strerror(errno));
 685                                 close(fd);
 686                                 return 1;
 687                         }
 688                 } else {
 689                         break;
 690                 }
 691
 692                 if (count == num_files)
 693                         file_size = file.st_size;
 694                 ret = read_chunks(fd, 0, file_size, chunk_buf, chunksize,
 695                                   time_st, inode_st, tempfile);
 696                 close(fd);
 697                 if (ret)
 698                         return 1;
 699
 700                 curr_bytes += file_size;
 701                 if (verbose > 1)
 702                         show_rate("read", tempfile, &start_time,
 703                                   total_bytes, curr_bytes);
 704
 705                 if (++file_num >= files_in_dir)
 706                         file_num = 0;
 707         }
 708         if (verbose > 1){
 709                 verbose++;
 710                 show_rate("read", tempfile, &start_time,
 711                           total_bytes, curr_bytes);
 712                 printf("\nread complete\n");
 713                 verbose--;
 714         }
 715         return 0;
 716 }
 717
 718 int main(int argc, char **argv)
 719 {
 720         time_t time_st = 0;             /* Default timestamp */
 721         size_t chunksize = ONE_MB;      /* IO chunk size(defailt=1MB) */
 722         char *chunk_buf;                /* chunk buffer */
 723         int error = 0;
 724         FILE *countfile = NULL;
 725         unsigned long dir_num = 0, dir_num_orig = 0;/* starting directory */
 726         int c;
 727
 728         progname = strrchr(argv[0], '/') ? strrchr(argv[0], '/') + 1 : argv[0];
 729         while ((c = getopt_long(argc, argv, "c:hlo:pqrs:t:vw",
 730                                       longopts, NULL)) != -1) {
 731                 switch (c) {
 732                 case 'c':
 733                         chunksize = strtoul(optarg, NULL, 0) * ONE_MB;
 734                         if (chunksize == 0) {
 735                                 fprintf(stderr, "%s: bad chunk size '%s'\n",
 736                                         optarg, progname);
 737                                 return -1;
 738                         }
 739                         break;
 740                 case 'l':
 741                         full = 1;
 742                         break;
 743                 case 'o': /* offset */
 744                         dir_num = strtoul(optarg, NULL, 0);
 745                         break;
 746                 case 'p':
 747                         file_size = ONE_MB;
 748                         chunksize = ONE_MB;
 749                         files_in_dir = 1;
 750                         full = 0;
 751                         break;
 752                 case 'q':
 753                         verbose = 0;
 754                         break;
 755                 case 'r':
 756                         readoption = 1;
 757                         break;
 758                 case 's':
 759                         file_size = strtoul(optarg, NULL, 0) * ONE_MB;
 760                         if (file_size == 0) {
 761                                 fprintf(stderr, "%s: bad file size '%s'\n",
 762                                         optarg, progname);
 763                                 return -1;
 764                         }
 765                         break;
 766                 case 't':
 767                         time_st = (time_t)strtoul(optarg, NULL, 0);
 768                         break;
 769                 case 'v':
 770                         verbose++;
 771                         break;
 772                 case 'w':
 773                         writeoption = 1;
 774                         break;
 775
 776                 case 'h':
 777                 default:
 778                         usage(1);
 779                         return 0;
 780                 }
 781         }
 782         testdir = argv[optind];
 783
 784         if (!testdir) {
 785                 fprintf(stderr, "%s: pathname not given\n", progname);
 786                 usage(1);
 787                 return -1;
 788         }
 789         if (!readoption && !writeoption) {
 790                 readoption = 1;
 791                 writeoption = 1;
 792         }
 793         if (!time_st)
 794                 (void) time(&time_st);
 795         printf("Timestamp: %lu\n", (unsigned long )time_st);
 796         isatty_flag = isatty(STDOUT_FILENO);
 797
 798         if (!full) {
 799 #ifdef HAVE_EXT2FS_EXT2FS_H
 800                 struct mntent *tempmnt;
 801                 FILE *fp = NULL;
 802                 ext2_filsys fs;
 803
 804                 if ((fp = setmntent("/etc/mtab", "r")) == NULL){
 805                         fprintf(stderr, "%s: fail to open /etc/mtab in read"
 806                                 "mode :%s\n", progname, strerror(errno));
 807                         goto guess;
 808                 }
 809
 810                 /* find device name using filesystem */
 811                 while ((tempmnt = getmntent(fp)) != NULL) {
 812                         if (strcmp(tempmnt->mnt_dir, testdir) == 0)
 813                                 break;
 814                 }
 815
 816                 if (tempmnt == NULL) {
 817                         fprintf(stderr, "%s: no device found for '%s'\n",
 818                                 progname, testdir);
 819                         endmntent(fp);
 820                         goto guess;
 821                 }
 822
 823                 if (ext2fs_open(tempmnt->mnt_fsname, 0, 0, 0,
 824                                 unix_io_manager, &fs)) {
 825                         fprintf(stderr, "%s: unable to open ext3 fs on '%s'\n",
 826                                 progname, testdir);
 827                         endmntent(fp);
 828                         goto guess;
 829                 }
 830                 endmntent(fp);
 831
 832                 num_dirs = (fs->super->s_blocks_count +
 833                             fs->super->s_blocks_per_group - 1) /
 834                         fs->super->s_blocks_per_group;
 835                 if (verbose)
 836                         printf("ext3 block groups: %u, fs blocks: %u "
 837                                "blocks per group: %u\n",
 838                                num_dirs, fs->super->s_blocks_count,
 839                                fs->super->s_blocks_per_group);
 840                 ext2fs_close(fs);
 841 #else
 842                 goto guess;
 843 #endif
 844                 if (0) { /* ugh */
 845                         struct statfs64 statbuf;
 846 guess:
 847                         if (statfs64(testdir, &statbuf) == 0) {
 848                                 num_dirs = (long long)statbuf.f_blocks *
 849                                         statbuf.f_bsize / (128ULL << 20);
 850                                 if (verbose)
 851                                         printf("dirs: %u, fs blocks: %llu\n",
 852                                                num_dirs,
 853                                                (long long)statbuf.f_blocks);
 854                         } else {
 855                                 fprintf(stderr, "%s: unable to stat '%s': %s\n",
 856                                         progname, testdir, strerror(errno));
 857                                 if (verbose)
 858                                         printf("dirs: %u\n", num_dirs);
 859                         }
 860                 }
 861         }
 862         chunk_buf = (char *)calloc(chunksize, 1);
 863         if (chunk_buf == NULL) {
 864                 fprintf(stderr, "Memory allocation failed for chunk_buf\n");
 865                 return 4;
 866         }
 867         sprintf(filecount, "%s/%s.filecount", 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 }