misc/badblocks.c

   1 /*
   2  * badblocks.c          - Bad blocks checker
   3  *
   4  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                                 Laboratoire MASI, Institut Blaise Pascal
   6  *                                 Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * Copyright 1995, 1996, 1997, 1998, 1999 by Theodore Ts'o
   9  * Copyright 1999 by David Beattie
  10  *
  11  * This file is based on the minix file system programs fsck and mkfs
  12  * written and copyrighted by Linus Torvalds <Linus.Torvalds@cs.helsinki.fi>
  13  *
  14  * %Begin-Header%
  15  * This file may be redistributed under the terms of the GNU Public
  16  * License.
  17  * %End-Header%
  18  */
  19
  20 /*
  21  * History:
  22  * 93/05/26     - Creation from e2fsck
  23  * 94/02/27     - Made a separate bad blocks checker
  24  * 99/06/30...99/07/26 - Added non-destructive write-testing,
  25  *                       configurable blocks-at-once parameter,
  26  *                       loading of badblocks list to avoid testing
  27  *                       blocks known to be bad, multiple passes to
  28  *                       make sure that no new blocks are added to the
  29  *                       list.  (Work done by David Beattie)
  30  */
  31
  32 #define _GNU_SOURCE /* for O_DIRECT */
  33
  34 #include <errno.h>
  35 #include <fcntl.h>
  36 #ifdef HAVE_GETOPT_H
  37 #include <getopt.h>
  38 #else
  39 extern char *optarg;
  40 extern int optind;
  41 #endif
  42 #include <signal.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47 #include <setjmp.h>
  48 #include <time.h>
  49
  50 #include <sys/ioctl.h>
  51 #include <sys/types.h>
  52
  53 #include "et/com_err.h"
  54 #include "ext2fs/ext2_io.h"
  55 #include "ext2fs/ext2_fs.h"
  56 #include "ext2fs/ext2fs.h"
  57 #include "nls-enable.h"
  58
  59 const char * program_name = "badblocks";
  60 const char * done_string = N_("done                        \n");
  61
  62 static int v_flag = 0;                  /* verbose */
  63 static int w_flag = 0;                  /* do r/w test: 0=no, 1=yes,
  64                                          * 2=non-destructive */
  65 static int s_flag = 0;                  /* show progress of test */
  66 static int force = 0;                   /* force check of mounted device */
  67 static int t_flag = 0;                  /* number of test patterns */
  68 static int t_max = 0;                   /* allocated test patterns */
  69 static unsigned long *t_patts = NULL;   /* test patterns */
  70 static int current_O_DIRECT = 0;        /* Current status of O_DIRECT flag */
  71
  72 #define T_INC 32
  73
  74 int sys_page_size = 4096;
  75
  76 static void usage(void)
  77 {
  78         fprintf(stderr, _("Usage: %s [-b block_size] [-i input_file] [-o output_file] [-svwnf]\n [-c blocks_at_once] [-p num_passes] [-t test_pattern [-t test_pattern [...]]]\n device [last_block [start_block]]\n"),
  79                  program_name);
  80         exit (1);
  81 }
  82
  83 static unsigned long currently_testing = 0;
  84 static unsigned long num_blocks = 0;
  85 static ext2_badblocks_list bb_list = NULL;
  86 static FILE *out;
  87 static blk_t next_bad = 0;
  88 static ext2_badblocks_iterate bb_iter = NULL;
  89
  90 static void *allocate_buffer(size_t size)
  91 {
  92         void    *ret = 0;
  93
  94 #ifdef HAVE_POSIX_MEMALIGN
  95         if (posix_memalign(&ret, sys_page_size, size) < 0)
  96                 ret = 0;
  97 #else
  98 #ifdef HAVE_MEMALIGN
  99         ret = memalign(sys_page_size, size);
 100 #else
 101 #ifdef HAVE_VALLOC
 102         ret = valloc(size);
 103 #endif /* HAVE_VALLOC */
 104 #endif /* HAVE_MEMALIGN */
 105 #endif /* HAVE_POSIX_MEMALIGN */
 106
 107         if (!ret)
 108                 ret = malloc(size);
 109
 110         return ret;
 111 }
 112
 113 /*
 114  * This routine reports a new bad block.  If the bad block has already
 115  * been seen before, then it returns 0; otherwise it returns 1.
 116  */
 117 static int bb_output (unsigned long bad)
 118 {
 119         errcode_t errcode;
 120
 121         if (ext2fs_badblocks_list_test(bb_list, bad))
 122                 return 0;
 123
 124         fprintf(out, "%lu\n", bad);
 125         fflush(out);
 126
 127         errcode = ext2fs_badblocks_list_add (bb_list, bad);
 128         if (errcode) {
 129                 com_err (program_name, errcode, "adding to in-memory bad block list");
 130                 exit (1);
 131         }
 132
 133         /* kludge:
 134            increment the iteration through the bb_list if
 135            an element was just added before the current iteration
 136            position.  This should not cause next_bad to change. */
 137         if (bb_iter && bad < next_bad)
 138                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 139         return 1;
 140 }
 141
 142 static void print_status(void)
 143 {
 144         fprintf(stderr, "%9ld/%9ld", currently_testing, num_blocks);
 145         fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
 146         fflush (stderr);
 147 }
 148
 149 static void alarm_intr(int alnum)
 150 {
 151         signal (SIGALRM, alarm_intr);
 152         alarm(1);
 153         if (!num_blocks)
 154                 return;
 155         fprintf(stderr, "%9ld/%9ld", currently_testing, num_blocks);
 156         fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
 157         fflush (stderr);
 158 }
 159
 160 static void *terminate_addr = NULL;
 161
 162 static void terminate_intr(int signo)
 163 {
 164         if (terminate_addr)
 165                 longjmp(terminate_addr,1);
 166         exit(1);
 167 }
 168
 169 static void capture_terminate(jmp_buf term_addr)
 170 {
 171         terminate_addr = term_addr;
 172         signal (SIGHUP, terminate_intr);
 173         signal (SIGINT, terminate_intr);
 174         signal (SIGPIPE, terminate_intr);
 175         signal (SIGTERM, terminate_intr);
 176         signal (SIGUSR1, terminate_intr);
 177         signal (SIGUSR2, terminate_intr);
 178 }
 179
 180 static void uncapture_terminate(void)
 181 {
 182         terminate_addr = NULL;
 183         signal (SIGHUP, SIG_DFL);
 184         signal (SIGINT, SIG_DFL);
 185         signal (SIGPIPE, SIG_DFL);
 186         signal (SIGTERM, SIG_DFL);
 187         signal (SIGUSR1, SIG_DFL);
 188         signal (SIGUSR2, SIG_DFL);
 189 }
 190
 191 static void set_o_direct(int dev, unsigned char *buffer, size_t size)
 192 {
 193 #ifdef O_DIRECT
 194         int new_flag = O_DIRECT;
 195         int flag;
 196
 197         if ((((unsigned long) buffer & (sys_page_size - 1)) != 0) ||
 198             ((size & (sys_page_size - 1)) != 0))
 199                 new_flag = 0;
 200
 201         if (new_flag != current_O_DIRECT) {
 202                 printf("%s O_DIRECT\n", new_flag ? "Setting" : "Clearing");
 203                 flag = fcntl(dev, F_GETFL);
 204                 if (flag > 0) {
 205                         flag = (flag & ~O_DIRECT) | new_flag;
 206                         fcntl(dev, F_SETFL, flag);
 207                 }
 208                 current_O_DIRECT = new_flag;
 209         }
 210 #endif
 211 }
 212
 213
 214 static void pattern_fill(unsigned char *buffer, unsigned long pattern,
 215                          size_t n)
 216 {
 217         int     i, nb;
 218         unsigned char   bpattern[sizeof(pattern)], *ptr;
 219
 220         if (pattern == ~0) {
 221                 for (ptr = buffer; ptr < buffer + n; ptr++) {
 222                         (*ptr) = random() % (1 << (8 * sizeof(char)));
 223                 }
 224                 if (s_flag | v_flag)
 225                         fprintf(stderr, _("Testing with random pattern: "));
 226         } else {
 227                 bpattern[0] = 0;
 228                 for (i = 0; i < sizeof(bpattern); i++) {
 229                         if (pattern == 0)
 230                                 break;
 231                         bpattern[i] = pattern & 0xFF;
 232                         pattern = pattern >> 8;
 233                 }
 234                 nb = i ? (i-1) : 0;
 235                 for (ptr = buffer, i = nb; ptr < buffer + n; ptr++) {
 236                         *ptr = bpattern[i--];
 237                         if (i < 0)
 238                                 i = nb;
 239                 }
 240                 if (s_flag | v_flag) {
 241                         fprintf(stderr, _("Testing with pattern 0x"));
 242                         for (i = 0; i <= nb; i++)
 243                                 fprintf(stderr, "%02x", buffer[i]);
 244                         fprintf(stderr, ": ");
 245                 }
 246         }
 247 }
 248
 249 /*
 250  * Perform a read of a sequence of blocks; return the number of blocks
 251  *    successfully sequentially read.
 252  */
 253 static long do_read (int dev, unsigned char * buffer, int try, int block_size,
 254                      unsigned long current_block)
 255 {
 256         long got;
 257
 258         set_o_direct(dev, buffer, try * block_size);
 259
 260         if (v_flag > 1)
 261                 print_status();
 262
 263         /* Seek to the correct loc. */
 264         if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size,
 265                          SEEK_SET) != (ext2_loff_t) current_block * block_size)
 266                 com_err (program_name, errno, _("during seek"));
 267
 268         /* Try the read */
 269         got = read (dev, buffer, try * block_size);
 270         if (got < 0)
 271                 got = 0;
 272         if (got & 511)
 273                 fprintf(stderr, _("Weird value (%ld) in do_read\n"), got);
 274         got /= block_size;
 275         return got;
 276 }
 277
 278 /*
 279  * Perform a write of a sequence of blocks; return the number of blocks
 280  *    successfully sequentially written.
 281  */
 282 static long do_write (int dev, unsigned char * buffer, int try, int block_size,
 283                      unsigned long current_block)
 284 {
 285         long got;
 286
 287         set_o_direct(dev, buffer, try * block_size);
 288
 289         if (v_flag > 1)
 290                 print_status();
 291
 292         /* Seek to the correct loc. */
 293         if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size,
 294                          SEEK_SET) != (ext2_loff_t) current_block * block_size)
 295                 com_err (program_name, errno, _("during seek"));
 296
 297         /* Try the write */
 298         got = write (dev, buffer, try * block_size);
 299         if (got < 0)
 300                 got = 0;
 301         if (got & 511)
 302                 fprintf (stderr,
 303                          "Weird value (%ld) in do_write\n", got);
 304         got /= block_size;
 305         return got;
 306 }
 307
 308 static int host_dev;
 309
 310 static void flush_bufs(void)
 311 {
 312         errcode_t       retval;
 313
 314         retval = ext2fs_sync_device(host_dev, 1);
 315         if (retval)
 316                 com_err(program_name, retval, _("during ext2fs_sync_device"));
 317 }
 318
 319 static unsigned int test_ro (int dev, unsigned long last_block,
 320                              int block_size, unsigned long from_count,
 321                              unsigned long blocks_at_once)
 322 {
 323         unsigned char * blkbuf;
 324         int try;
 325         long got;
 326         unsigned int bb_count = 0;
 327         errcode_t errcode;
 328
 329         errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter);
 330         if (errcode) {
 331                 com_err (program_name, errcode,
 332                          _("while beginning bad block list iteration"));
 333                 exit (1);
 334         }
 335         do {
 336                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 337         } while (next_bad && next_bad < from_count);
 338
 339         if (t_flag) {
 340                 blkbuf = allocate_buffer((blocks_at_once + 1) * block_size);
 341         } else {
 342                 blkbuf = allocate_buffer(blocks_at_once * block_size);
 343         }
 344         if (!blkbuf)
 345         {
 346                 com_err (program_name, ENOMEM, _("while allocating buffers"));
 347                 exit (1);
 348         }
 349         if (v_flag) {
 350             fprintf (stderr, _("Checking blocks %lu to %lu\n"), from_count,
 351                      last_block);
 352         }
 353         if (t_flag) {
 354                 fprintf(stderr, _("Checking for bad blocks in read-only mode\n"));
 355                 pattern_fill(blkbuf + blocks_at_once * block_size,
 356                              t_patts[0], block_size);
 357         }
 358         flush_bufs();
 359         try = blocks_at_once;
 360         currently_testing = from_count;
 361         num_blocks = last_block;
 362         if (!t_flag && (s_flag || v_flag)) {
 363                 fprintf(stderr,
 364                         _("Checking for bad blocks (read-only test): "));
 365                 if (v_flag <= 1)
 366                         alarm_intr(SIGALRM);
 367         }
 368         while (currently_testing < last_block)
 369         {
 370                 if (next_bad) {
 371                         if (currently_testing == next_bad) {
 372                                 /* fprintf (out, "%lu\n", nextbad); */
 373                                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 374                                 currently_testing++;
 375                                 continue;
 376                         }
 377                         else if (currently_testing + try > next_bad)
 378                                 try = next_bad - currently_testing;
 379                 }
 380                 if (currently_testing + try > last_block)
 381                         try = last_block - currently_testing;
 382                 got = do_read (dev, blkbuf, try, block_size, currently_testing);
 383                 if (t_flag) {
 384                         /* test the comparison between all the
 385                            blocks successfully read  */
 386                         int i;
 387                         for (i = 0; i < got; ++i)
 388                                 if (memcmp (blkbuf+i*block_size,
 389                                             blkbuf+blocks_at_once*block_size,
 390                                             block_size))
 391                                         bb_count += bb_output(currently_testing + i);
 392                 }
 393                 currently_testing += got;
 394                 if (got == try) {
 395                         try = blocks_at_once;
 396                         continue;
 397                 }
 398                 else
 399                         try = 1;
 400                 if (got == 0) {
 401                         bb_count += bb_output(currently_testing++);
 402                 }
 403         }
 404         num_blocks = 0;
 405         alarm(0);
 406         if (s_flag || v_flag)
 407                 fputs(done_string, stderr);
 408
 409         fflush (stderr);
 410         free (blkbuf);
 411
 412         ext2fs_badblocks_list_iterate_end(bb_iter);
 413
 414         return bb_count;
 415 }
 416
 417 static unsigned int test_rw (int dev, unsigned long last_block,
 418                              int block_size, unsigned long from_count,
 419                              unsigned long blocks_at_once)
 420 {
 421         unsigned char *buffer, *read_buffer;
 422         const unsigned long patterns[] = {0xaa, 0x55, 0xff, 0x00};
 423         const unsigned long *pattern;
 424         int i, try, got, nr_pattern, pat_idx;
 425         unsigned int bb_count = 0;
 426
 427         buffer = allocate_buffer(2 * blocks_at_once * block_size);
 428         read_buffer = buffer + blocks_at_once * block_size;
 429
 430         if (!buffer) {
 431                 com_err (program_name, ENOMEM, _("while allocating buffers"));
 432                 exit (1);
 433         }
 434
 435         flush_bufs();
 436
 437         if (v_flag) {
 438                 fprintf(stderr,
 439                         _("Checking for bad blocks in read-write mode\n"));
 440                 fprintf(stderr, _("From block %lu to %lu\n"),
 441                          from_count, last_block);
 442         }
 443         if (t_flag) {
 444                 pattern = t_patts;
 445                 nr_pattern = t_flag;
 446         } else {
 447                 pattern = patterns;
 448                 nr_pattern = sizeof(patterns) / sizeof(patterns[0]);
 449         }
 450         for (pat_idx = 0; pat_idx < nr_pattern; pat_idx++) {
 451                 pattern_fill(buffer, pattern[pat_idx],
 452                              blocks_at_once * block_size);
 453                 num_blocks = last_block;
 454                 currently_testing = from_count;
 455                 if (s_flag && v_flag <= 1)
 456                         alarm_intr(SIGALRM);
 457
 458                 try = blocks_at_once;
 459                 while (currently_testing < last_block) {
 460                         if (currently_testing + try > last_block)
 461                                 try = last_block - currently_testing;
 462                         got = do_write(dev, buffer, try, block_size,
 463                                         currently_testing);
 464                         if (v_flag > 1)
 465                                 print_status();
 466
 467                         currently_testing += got;
 468                         if (got == try) {
 469                                 try = blocks_at_once;
 470                                 continue;
 471                         } else
 472                                 try = 1;
 473                         if (got == 0) {
 474                                 bb_count += bb_output(currently_testing++);
 475                         }
 476                 }
 477
 478                 num_blocks = 0;
 479                 alarm (0);
 480                 if (s_flag | v_flag)
 481                         fputs(done_string, stderr);
 482                 flush_bufs();
 483                 if (s_flag | v_flag)
 484                         fprintf (stderr, _("Reading and comparing: "));
 485                 num_blocks = last_block;
 486                 currently_testing = from_count;
 487                 if (s_flag && v_flag <= 1)
 488                         alarm_intr(SIGALRM);
 489
 490                 try = blocks_at_once;
 491                 while (currently_testing < last_block) {
 492                         if (currently_testing + try > last_block)
 493                                 try = last_block - currently_testing;
 494                         got = do_read (dev, read_buffer, try, block_size,
 495                                        currently_testing);
 496                         if (got == 0) {
 497                                 bb_count += bb_output(currently_testing++);
 498                                 continue;
 499                         }
 500                         for (i=0; i < got; i++) {
 501                                 if (memcmp(read_buffer + i * block_size,
 502                                            buffer + i * block_size,
 503                                            block_size))
 504                                         bb_count += bb_output(currently_testing+i);
 505                         }
 506                         currently_testing += got;
 507                         if (v_flag > 1)
 508                                 print_status();
 509                 }
 510
 511                 num_blocks = 0;
 512                 alarm (0);
 513                 if (s_flag | v_flag)
 514                         fputs(done_string, stderr);
 515                 flush_bufs();
 516         }
 517         uncapture_terminate();
 518         free(buffer);
 519         return bb_count;
 520 }
 521
 522 struct saved_blk_record {
 523         blk_t   block;
 524         int     num;
 525 };
 526
 527 static unsigned int test_nd (int dev, unsigned long last_block,
 528                              int block_size, unsigned long from_count,
 529                              unsigned long blocks_at_once)
 530 {
 531         unsigned char *blkbuf, *save_ptr, *test_ptr, *read_ptr;
 532         unsigned char *test_base, *save_base, *read_base;
 533         int try, i;
 534         const unsigned long patterns[] = { ~0 };
 535         const unsigned long *pattern;
 536         int nr_pattern, pat_idx;
 537         long got, used2, written, save_currently_testing;
 538         struct saved_blk_record *test_record;
 539         /* This is static to prevent being clobbered by the longjmp */
 540         static int num_saved;
 541         jmp_buf terminate_env;
 542         errcode_t errcode;
 543         long buf_used;
 544         unsigned int bb_count = 0;
 545
 546         errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter);
 547         if (errcode) {
 548                 com_err (program_name, errcode,
 549                          _("while beginning bad block list iteration"));
 550                 exit (1);
 551         }
 552         do {
 553                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 554         } while (next_bad && next_bad < from_count);
 555
 556         blkbuf = allocate_buffer(3 * blocks_at_once * block_size);
 557         test_record = malloc (blocks_at_once*sizeof(struct saved_blk_record));
 558         if (!blkbuf || !test_record) {
 559                 com_err(program_name, ENOMEM, _("while allocating buffers"));
 560                 exit (1);
 561         }
 562
 563         save_base = blkbuf;
 564         test_base = blkbuf + (blocks_at_once * block_size);
 565         read_base = blkbuf + (2 * blocks_at_once * block_size);
 566
 567         num_saved = 0;
 568
 569         flush_bufs();
 570         if (v_flag) {
 571             fprintf (stderr,
 572                      _("Checking for bad blocks in non-destructive read-write mode\n"));
 573             fprintf (stderr, _("From block %lu to %lu\n"), from_count, last_block);
 574         }
 575         if (s_flag || v_flag > 1) {
 576                 fprintf(stderr, _("Checking for bad blocks (non-destructive read-write test)\n"));
 577         }
 578         if (setjmp(terminate_env)) {
 579                 /*
 580                  * Abnormal termination by a signal is handled here.
 581                  */
 582                 signal (SIGALRM, SIG_IGN);
 583                 fprintf(stderr, _("\nInterrupt caught, cleaning up\n"));
 584
 585                 save_ptr = save_base;
 586                 for (i=0; i < num_saved; i++) {
 587                         do_write(dev, save_ptr, test_record[i].num,
 588                                  block_size, test_record[i].block);
 589                         save_ptr += test_record[i].num * block_size;
 590                 }
 591                 fflush (out);
 592                 exit(1);
 593         }
 594
 595         /* set up abend handler */
 596         capture_terminate(terminate_env);
 597
 598         if (t_flag) {
 599                 pattern = t_patts;
 600                 nr_pattern = t_flag;
 601         } else {
 602                 pattern = patterns;
 603                 nr_pattern = sizeof(patterns) / sizeof(patterns[0]);
 604         }
 605         for (pat_idx = 0; pat_idx < nr_pattern; pat_idx++) {
 606                 pattern_fill(test_base, pattern[pat_idx],
 607                              blocks_at_once * block_size);
 608
 609                 buf_used = 0;
 610                 bb_count = 0;
 611                 save_ptr = save_base;
 612                 test_ptr = test_base;
 613                 currently_testing = from_count;
 614                 num_blocks = last_block;
 615                 if (s_flag && v_flag <= 1)
 616                         alarm_intr(SIGALRM);
 617
 618                 while (currently_testing < last_block) {
 619                         got = try = blocks_at_once - buf_used;
 620                         if (next_bad) {
 621                                 if (currently_testing == next_bad) {
 622                                         /* fprintf (out, "%lu\n", nextbad); */
 623                                         ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 624                                         currently_testing++;
 625                                         goto check_for_more;
 626                                 }
 627                                 else if (currently_testing + try > next_bad)
 628                                         try = next_bad - currently_testing;
 629                         }
 630                         if (currently_testing + try > last_block)
 631                                 try = last_block - currently_testing;
 632                         got = do_read (dev, save_ptr, try, block_size,
 633                                        currently_testing);
 634                         if (got == 0) {
 635                                 /* First block must have been bad. */
 636                                 bb_count += bb_output(currently_testing++);
 637                                 goto check_for_more;
 638                         }
 639
 640                         /*
 641                          * Note the fact that we've saved this much data
 642                          * *before* we overwrite it with test data
 643                          */
 644                         test_record[num_saved].block = currently_testing;
 645                         test_record[num_saved].num = got;
 646                         num_saved++;
 647
 648                         /* Write the test data */
 649                         written = do_write (dev, test_ptr, got, block_size,
 650                                             currently_testing);
 651                         if (written != got)
 652                                 com_err (program_name, errno,
 653                                          _("during test data write, block %lu"),
 654                                          currently_testing + written);
 655
 656                         buf_used += got;
 657                         save_ptr += got * block_size;
 658                         test_ptr += got * block_size;
 659                         currently_testing += got;
 660                         if (got != try)
 661                                 bb_count += bb_output(currently_testing++);
 662
 663                 check_for_more:
 664                         /*
 665                          * If there's room for more blocks to be tested this
 666                          * around, and we're not done yet testing the disk, go
 667                          * back and get some more blocks.
 668                          */
 669                         if ((buf_used != blocks_at_once) &&
 670                             (currently_testing < last_block))
 671                                 continue;
 672
 673                         flush_bufs();
 674                         save_currently_testing = currently_testing;
 675
 676                         /*
 677                          * for each contiguous block that we read into the
 678                          * buffer (and wrote test data into afterwards), read
 679                          * it back (looping if necessary, to get past newly
 680                          * discovered unreadable blocks, of which there should
 681                          * be none, but with a hard drive which is unreliable,
 682                          * it has happened), and compare with the test data
 683                          * that was written; output to the bad block list if
 684                          * it doesn't match.
 685                          */
 686                         used2 = 0;
 687                         save_ptr = save_base;
 688                         test_ptr = test_base;
 689                         read_ptr = read_base;
 690                         try = 0;
 691
 692                         while (1) {
 693                                 if (try == 0) {
 694                                         if (used2 >= num_saved)
 695                                                 break;
 696                                         currently_testing = test_record[used2].block;
 697                                         try = test_record[used2].num;
 698                                         used2++;
 699                                 }
 700
 701                                 got = do_read (dev, read_ptr, try,
 702                                                block_size, currently_testing);
 703
 704                                 /* test the comparison between all the
 705                                    blocks successfully read  */
 706                                 for (i = 0; i < got; ++i)
 707                                         if (memcmp (test_ptr+i*block_size,
 708                                                     read_ptr+i*block_size, block_size))
 709                                                 bb_count += bb_output(currently_testing + i);
 710                                 if (got < try) {
 711                                         bb_count += bb_output(currently_testing + got);
 712                                         got++;
 713                                 }
 714
 715                                 /* write back original data */
 716                                 do_write (dev, save_ptr, got,
 717                                           block_size, currently_testing);
 718                                 save_ptr += got * block_size;
 719
 720                                 currently_testing += got;
 721                                 test_ptr += got * block_size;
 722                                 read_ptr += got * block_size;
 723                                 try -= got;
 724                         }
 725
 726                         /* empty the buffer so it can be reused */
 727                         num_saved = 0;
 728                         buf_used = 0;
 729                         save_ptr = save_base;
 730                         test_ptr = test_base;
 731                         currently_testing = save_currently_testing;
 732                 }
 733                 num_blocks = 0;
 734                 alarm(0);
 735                 if (s_flag || v_flag > 1)
 736                         fputs(done_string, stderr);
 737
 738                 flush_bufs();
 739         }
 740         uncapture_terminate();
 741         fflush(stderr);
 742         free(blkbuf);
 743         free(test_record);
 744
 745         ext2fs_badblocks_list_iterate_end(bb_iter);
 746
 747         return bb_count;
 748 }
 749
 750 static void check_mount(char *device_name)
 751 {
 752         errcode_t       retval;
 753         int             mount_flags;
 754
 755         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
 756         if (retval) {
 757                 com_err("ext2fs_check_if_mount", retval,
 758                         _("while determining whether %s is mounted."),
 759                         device_name);
 760                 return;
 761         }
 762         if (!(mount_flags & EXT2_MF_MOUNTED))
 763                 return;
 764
 765         fprintf(stderr, _("%s is mounted; "), device_name);
 766         if (force) {
 767                 fprintf(stderr, _("badblocks forced anyway.  "
 768                         "Hope /etc/mtab is incorrect.\n"));
 769                 return;
 770         }
 771         fprintf(stderr, _("it's not safe to run badblocks!\n"));
 772         exit(1);
 773 }
 774
 775
 776 int main (int argc, char ** argv)
 777 {
 778         int c;
 779         char * tmp;
 780         char * device_name;
 781         char * host_device_name = NULL;
 782         char * input_file = NULL;
 783         char * output_file = NULL;
 784         FILE * in = NULL;
 785         int block_size = 1024;
 786         unsigned long blocks_at_once = 16;
 787         blk_t last_block, from_count;
 788         int num_passes = 0;
 789         int passes_clean = 0;
 790         int dev;
 791         errcode_t errcode;
 792         unsigned long pattern;
 793         unsigned int (*test_func)(int, unsigned long,
 794                                   int, unsigned long,
 795                                   unsigned long);
 796         int open_flag = 0;
 797         long sysval;
 798
 799         setbuf(stdout, NULL);
 800         setbuf(stderr, NULL);
 801 #ifdef ENABLE_NLS
 802         setlocale(LC_MESSAGES, "");
 803         setlocale(LC_CTYPE, "");
 804         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 805         textdomain(NLS_CAT_NAME);
 806 #endif
 807         srandom((unsigned int)time(NULL));  /* simple randomness is enough */
 808         test_func = test_ro;
 809
 810         /* Determine the system page size if possible */
 811 #ifdef HAVE_SYSCONF
 812 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
 813 #define _SC_PAGESIZE _SC_PAGE_SIZE
 814 #endif
 815 #ifdef _SC_PAGESIZE
 816         sysval = sysconf(_SC_PAGESIZE);
 817         if (sysval > 0)
 818                 sys_page_size = sysval;
 819 #endif /* _SC_PAGESIZE */
 820 #endif /* HAVE_SYSCONF */
 821
 822         if (argc && *argv)
 823                 program_name = *argv;
 824         while ((c = getopt (argc, argv, "b:fi:o:svwnc:p:h:t:")) != EOF) {
 825                 switch (c) {
 826                 case 'b':
 827                         block_size = strtoul (optarg, &tmp, 0);
 828                         if (*tmp || block_size > 4096) {
 829                                 com_err (program_name, 0,
 830                                          _("bad block size - %s"), optarg);
 831                                 exit (1);
 832                         }
 833                         break;
 834                 case 'f':
 835                         force++;
 836                         break;
 837                 case 'i':
 838                         input_file = optarg;
 839                         break;
 840                 case 'o':
 841                         output_file = optarg;
 842                         break;
 843                 case 's':
 844                         s_flag = 1;
 845                         break;
 846                 case 'v':
 847                         v_flag++;
 848                         break;
 849                 case 'w':
 850                         if (w_flag)
 851                                 usage();
 852                         test_func = test_rw;
 853                         w_flag = 1;
 854                         break;
 855                 case 'n':
 856                         if (w_flag)
 857                                 usage();
 858                         test_func = test_nd;
 859                         w_flag = 2;
 860                         break;
 861                 case 'c':
 862                         blocks_at_once = strtoul (optarg, &tmp, 0);
 863                         if (*tmp) {
 864                                 com_err (program_name, 0,
 865                                          "bad simultaneous block count - %s", optarg);
 866                                 exit (1);
 867                         }
 868                         break;
 869                 case 'p':
 870                         num_passes = strtoul (optarg, &tmp, 0);
 871                         if (*tmp) {
 872                                 com_err (program_name, 0,
 873                                     "bad number of clean passes - %s", optarg);
 874                                 exit (1);
 875                         }
 876                         break;
 877                 case 'h':
 878                         host_device_name = optarg;
 879                         break;
 880                 case 't':
 881                         if (t_flag + 1 > t_max) {
 882                                 unsigned long *t_patts_new;
 883
 884                                 t_patts_new = realloc(t_patts, t_max + T_INC);
 885                                 if (!t_patts_new) {
 886                                         com_err(program_name, ENOMEM,
 887                                                 _("can't allocate memory for "
 888                                                   "test_pattern - %s"),
 889                                                 optarg);
 890                                         exit(1);
 891                                 }
 892                                 t_patts = t_patts_new;
 893                                 t_max += T_INC;
 894                         }
 895                         if (!strcmp(optarg, "r") || !strcmp(optarg,"random")) {
 896                                 t_patts[t_flag++] = ~0;
 897                         } else {
 898                                 pattern = strtoul(optarg, &tmp, 0);
 899                                 if (*tmp) {
 900                                         com_err(program_name, 0,
 901                                         _("invalid test_pattern: %s\n"),
 902                                                 optarg);
 903                                         exit(1);
 904                                 }
 905                                 if (pattern == ~0)
 906                                         pattern = 0xffff;
 907                                 t_patts[t_flag++] = pattern;
 908                         }
 909                         break;
 910                 default:
 911                         usage();
 912                 }
 913         }
 914         if (!w_flag) {
 915                 if (t_flag > 1) {
 916                         com_err(program_name, 0,
 917                         _("Maximum of one test_pattern may be specified "
 918                           "in read-only mode"));
 919                         exit(1);
 920                 }
 921                 if (t_patts && (t_patts[0] == ~0)) {
 922                         com_err(program_name, 0,
 923                         _("Random test_pattern is not allowed "
 924                           "in read-only mode"));
 925                         exit(1);
 926                 }
 927         }
 928         if (optind > argc - 1)
 929                 usage();
 930         device_name = argv[optind++];
 931         if (optind > argc - 1) {
 932                 errcode = ext2fs_get_device_size(device_name,
 933                                                  block_size,
 934                                                  &last_block);
 935                 if (errcode == EXT2_ET_UNIMPLEMENTED) {
 936                         com_err(program_name, 0,
 937                                 _("Couldn't determine device size; you "
 938                                   "must specify\nthe size manually\n"));
 939                         exit(1);
 940                 }
 941                 if (errcode) {
 942                         com_err(program_name, errcode,
 943                                 _("while trying to determine device size"));
 944                         exit(1);
 945                 }
 946         } else {
 947                 last_block = strtoul (argv[optind], &tmp, 0);
 948                 if (*tmp) {
 949                         com_err (program_name, 0, _("bad blocks count - %s"),
 950                                  argv[optind]);
 951                         exit (1);
 952                 }
 953                 optind++;
 954         }
 955         if (optind <= argc-1) {
 956                 from_count = strtoul (argv[optind], &tmp, 0);
 957                 if (*tmp) {
 958                         com_err (program_name, 0, _("bad starting block - %s"),
 959                                  argv[optind]);
 960                         exit (1);
 961                 }
 962         } else from_count = 0;
 963         if (from_count >= last_block) {
 964             com_err (program_name, 0, _("bad blocks range: %lu-%lu"),
 965                      from_count, last_block);
 966             exit (1);
 967         }
 968         if (w_flag)
 969                 check_mount(device_name);
 970
 971         open_flag = w_flag ? O_RDWR : O_RDONLY;
 972         dev = open (device_name, open_flag);
 973         if (dev == -1) {
 974                 com_err (program_name, errno, _("while trying to open %s"),
 975                          device_name);
 976                 exit (1);
 977         }
 978         if (host_device_name) {
 979                 host_dev = open (host_device_name, open_flag);
 980                 if (host_dev == -1) {
 981                         com_err (program_name, errno,
 982                                  _("while trying to open %s"),
 983                                  host_device_name);
 984                         exit (1);
 985                 }
 986         } else
 987                 host_dev = dev;
 988         if (input_file) {
 989                 if (strcmp (input_file, "-") == 0)
 990                         in = stdin;
 991                 else {
 992                         in = fopen (input_file, "r");
 993                         if (in == NULL)
 994                         {
 995                                 com_err (program_name, errno,
 996                                          _("while trying to open %s"),
 997                                          input_file);
 998                                 exit (1);
 999                         }
1000                 }
1001         }
1002         if (output_file && strcmp (output_file, "-") != 0)
1003         {
1004                 out = fopen (output_file, "w");
1005                 if (out == NULL)
1006                 {
1007                         com_err (program_name, errno,
1008                                  _("while trying to open %s"),
1009                                  output_file);
1010                         exit (1);
1011                 }
1012         }
1013         else
1014                 out = stdout;
1015
1016         errcode = ext2fs_badblocks_list_create(&bb_list,0);
1017         if (errcode) {
1018                 com_err (program_name, errcode,
1019                          _("creating in-memory bad blocks list"));
1020                 exit (1);
1021         }
1022
1023         if (in) {
1024                 for(;;) {
1025                         switch(fscanf (in, "%u\n", &next_bad)) {
1026                                 case 0:
1027                                         com_err (program_name, 0, "input file - bad format");
1028                                         exit (1);
1029                                 case EOF:
1030                                         break;
1031                                 default:
1032                                         errcode = ext2fs_badblocks_list_add(bb_list,next_bad);
1033                                         if (errcode) {
1034                                                 com_err (program_name, errcode, _("adding to in-memory bad block list"));
1035                                                 exit (1);
1036                                         }
1037                                         continue;
1038                         }
1039                         break;
1040                 }
1041
1042                 if (in != stdin)
1043                         fclose (in);
1044         }
1045
1046         do {
1047                 unsigned int bb_count;
1048
1049                 bb_count = test_func(dev, last_block, block_size,
1050                                      from_count, blocks_at_once);
1051                 if (bb_count)
1052                         passes_clean = 0;
1053                 else
1054                         ++passes_clean;
1055
1056                 if (v_flag)
1057                         fprintf(stderr,
1058                                 _("Pass completed, %u bad blocks found.\n"),
1059                                 bb_count);
1060
1061         } while (passes_clean < num_passes);
1062
1063         close (dev);
1064         if (out != stdout)
1065                 fclose (out);
1066         if (t_patts)
1067                 free(t_patts);
1068         return 0;
1069 }
1070