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 #include <limits.h>
  50
  51 #include <sys/ioctl.h>
  52 #include <sys/types.h>
  53
  54 #include "et/com_err.h"
  55 #include "ext2fs/ext2_io.h"
  56 #include "ext2fs/ext2_fs.h"
  57 #include "ext2fs/ext2fs.h"
  58 #include "nls-enable.h"
  59
  60 const char * program_name = "badblocks";
  61 const char * done_string = N_("done                                \n");
  62
  63 static int v_flag = 0;                  /* verbose */
  64 static int w_flag = 0;                  /* do r/w test: 0=no, 1=yes,
  65                                          * 2=non-destructive */
  66 static int s_flag = 0;                  /* show progress of test */
  67 static int force = 0;                   /* force check of mounted device */
  68 static int t_flag = 0;                  /* number of test patterns */
  69 static int t_max = 0;                   /* allocated test patterns */
  70 static unsigned int *t_patts = NULL;    /* test patterns */
  71 static int current_O_DIRECT = 0;        /* Current status of O_DIRECT flag */
  72 static int exclusive_ok = 0;
  73
  74 #define T_INC 32
  75
  76 int sys_page_size = 4096;
  77
  78 static void usage(void)
  79 {
  80         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"),
  81                  program_name);
  82         exit (1);
  83 }
  84
  85 static void exclusive_usage(void)
  86 {
  87         fprintf(stderr,
  88                 _("%s: The -n and -w options are mutually exclusive.\n\n"),
  89                 program_name);
  90         exit(1);
  91 }
  92
  93 static unsigned long currently_testing = 0;
  94 static unsigned long num_blocks = 0;
  95 static ext2_badblocks_list bb_list = NULL;
  96 static FILE *out;
  97 static blk_t next_bad = 0;
  98 static ext2_badblocks_iterate bb_iter = NULL;
  99
 100 static void *allocate_buffer(size_t size)
 101 {
 102         void    *ret = 0;
 103
 104 #ifdef HAVE_POSIX_MEMALIGN
 105         if (posix_memalign(&ret, sys_page_size, size) < 0)
 106                 ret = 0;
 107 #else
 108 #ifdef HAVE_MEMALIGN
 109         ret = memalign(sys_page_size, size);
 110 #else
 111 #ifdef HAVE_VALLOC
 112         ret = valloc(size);
 113 #endif /* HAVE_VALLOC */
 114 #endif /* HAVE_MEMALIGN */
 115 #endif /* HAVE_POSIX_MEMALIGN */
 116
 117         if (!ret)
 118                 ret = malloc(size);
 119
 120         return ret;
 121 }
 122
 123 /*
 124  * This routine reports a new bad block.  If the bad block has already
 125  * been seen before, then it returns 0; otherwise it returns 1.
 126  */
 127 static int bb_output (unsigned long bad)
 128 {
 129         errcode_t errcode;
 130
 131         if (ext2fs_badblocks_list_test(bb_list, bad))
 132                 return 0;
 133
 134         fprintf(out, "%lu\n", bad);
 135         fflush(out);
 136
 137         errcode = ext2fs_badblocks_list_add (bb_list, bad);
 138         if (errcode) {
 139                 com_err (program_name, errcode, "adding to in-memory bad block list");
 140                 exit (1);
 141         }
 142
 143         /* kludge:
 144            increment the iteration through the bb_list if
 145            an element was just added before the current iteration
 146            position.  This should not cause next_bad to change. */
 147         if (bb_iter && bad < next_bad)
 148                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 149         return 1;
 150 }
 151
 152 static void print_status(void)
 153 {
 154         fprintf(stderr, "%15ld/%15ld", currently_testing, num_blocks);
 155         fputs("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b", stderr);
 156         fflush (stderr);
 157 }
 158
 159 static void alarm_intr(int alnum EXT2FS_ATTR((unused)))
 160 {
 161         signal (SIGALRM, alarm_intr);
 162         alarm(1);
 163         if (!num_blocks)
 164                 return;
 165         print_status();
 166 }
 167
 168 static void *terminate_addr = NULL;
 169
 170 static void terminate_intr(int signo EXT2FS_ATTR((unused)))
 171 {
 172         if (terminate_addr)
 173                 longjmp(terminate_addr,1);
 174         exit(1);
 175 }
 176
 177 static void capture_terminate(jmp_buf term_addr)
 178 {
 179         terminate_addr = term_addr;
 180         signal (SIGHUP, terminate_intr);
 181         signal (SIGINT, terminate_intr);
 182         signal (SIGPIPE, terminate_intr);
 183         signal (SIGTERM, terminate_intr);
 184         signal (SIGUSR1, terminate_intr);
 185         signal (SIGUSR2, terminate_intr);
 186 }
 187
 188 static void uncapture_terminate(void)
 189 {
 190         terminate_addr = NULL;
 191         signal (SIGHUP, SIG_DFL);
 192         signal (SIGINT, SIG_DFL);
 193         signal (SIGPIPE, SIG_DFL);
 194         signal (SIGTERM, SIG_DFL);
 195         signal (SIGUSR1, SIG_DFL);
 196         signal (SIGUSR2, SIG_DFL);
 197 }
 198
 199 static void set_o_direct(int dev, unsigned char *buffer, size_t size,
 200                          unsigned long current_block)
 201 {
 202 #ifdef O_DIRECT
 203         int new_flag = O_DIRECT;
 204         int flag;
 205
 206         if ((((unsigned long) buffer & (sys_page_size - 1)) != 0) ||
 207             ((size & (sys_page_size - 1)) != 0) ||
 208             ((current_block & ((sys_page_size >> 9)-1)) != 0))
 209                 new_flag = 0;
 210
 211         if (new_flag != current_O_DIRECT) {
 212              /* printf("%s O_DIRECT\n", new_flag ? "Setting" : "Clearing"); */
 213                 flag = fcntl(dev, F_GETFL);
 214                 if (flag > 0) {
 215                         flag = (flag & ~O_DIRECT) | new_flag;
 216                         fcntl(dev, F_SETFL, flag);
 217                 }
 218                 current_O_DIRECT = new_flag;
 219         }
 220 #endif
 221 }
 222
 223
 224 static void pattern_fill(unsigned char *buffer, unsigned int pattern,
 225                          size_t n)
 226 {
 227         unsigned int    i, nb;
 228         unsigned char   bpattern[sizeof(pattern)], *ptr;
 229
 230         if (pattern == (unsigned int) ~0) {
 231                 for (ptr = buffer; ptr < buffer + n; ptr++) {
 232                         (*ptr) = random() % (1 << (8 * sizeof(char)));
 233                 }
 234                 if (s_flag | v_flag)
 235                         fputs(_("Testing with random pattern: "), stderr);
 236         } else {
 237                 bpattern[0] = 0;
 238                 for (i = 0; i < sizeof(bpattern); i++) {
 239                         if (pattern == 0)
 240                                 break;
 241                         bpattern[i] = pattern & 0xFF;
 242                         pattern = pattern >> 8;
 243                 }
 244                 nb = i ? (i-1) : 0;
 245                 for (ptr = buffer, i = nb; ptr < buffer + n; ptr++) {
 246                         *ptr = bpattern[i];
 247                         if (i == 0)
 248                                 i = nb;
 249                         else
 250                                 i--;
 251                 }
 252                 if (s_flag | v_flag) {
 253                         fputs(_("Testing with pattern 0x"), stderr);
 254                         for (i = 0; i <= nb; i++)
 255                                 fprintf(stderr, "%02x", buffer[i]);
 256                         fputs(": ", stderr);
 257                 }
 258         }
 259 }
 260
 261 /*
 262  * Perform a read of a sequence of blocks; return the number of blocks
 263  *    successfully sequentially read.
 264  */
 265 static long do_read (int dev, unsigned char * buffer, int try, int block_size,
 266                      unsigned long current_block)
 267 {
 268         long got;
 269
 270         set_o_direct(dev, buffer, try * block_size, current_block);
 271
 272         if (v_flag > 1)
 273                 print_status();
 274
 275         /* Seek to the correct loc. */
 276         if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size,
 277                          SEEK_SET) != (ext2_loff_t) current_block * block_size)
 278                 com_err (program_name, errno, _("during seek"));
 279
 280         /* Try the read */
 281         got = read (dev, buffer, try * block_size);
 282         if (got < 0)
 283                 got = 0;
 284         if (got & 511)
 285                 fprintf(stderr, _("Weird value (%ld) in do_read\n"), got);
 286         got /= block_size;
 287         return got;
 288 }
 289
 290 /*
 291  * Perform a write of a sequence of blocks; return the number of blocks
 292  *    successfully sequentially written.
 293  */
 294 static long do_write (int dev, unsigned char * buffer, int try, int block_size,
 295                      unsigned long current_block)
 296 {
 297         long got;
 298
 299         set_o_direct(dev, buffer, try * block_size, current_block);
 300
 301         if (v_flag > 1)
 302                 print_status();
 303
 304         /* Seek to the correct loc. */
 305         if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size,
 306                          SEEK_SET) != (ext2_loff_t) current_block * block_size)
 307                 com_err (program_name, errno, _("during seek"));
 308
 309         /* Try the write */
 310         got = write (dev, buffer, try * block_size);
 311         if (got < 0)
 312                 got = 0;
 313         if (got & 511)
 314                 fprintf(stderr, "Weird value (%ld) in do_write\n", got);
 315         got /= block_size;
 316         return got;
 317 }
 318
 319 static int host_dev;
 320
 321 static void flush_bufs(void)
 322 {
 323         errcode_t       retval;
 324
 325         retval = ext2fs_sync_device(host_dev, 1);
 326         if (retval)
 327                 com_err(program_name, retval, _("during ext2fs_sync_device"));
 328 }
 329
 330 static unsigned int test_ro (int dev, unsigned long last_block,
 331                              int block_size, unsigned long from_count,
 332                              unsigned long blocks_at_once)
 333 {
 334         unsigned char * blkbuf;
 335         int try;
 336         long got;
 337         unsigned int bb_count = 0;
 338         errcode_t errcode;
 339
 340         errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter);
 341         if (errcode) {
 342                 com_err (program_name, errcode,
 343                          _("while beginning bad block list iteration"));
 344                 exit (1);
 345         }
 346         do {
 347                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 348         } while (next_bad && next_bad < from_count);
 349
 350         if (t_flag) {
 351                 blkbuf = allocate_buffer((blocks_at_once + 1) * block_size);
 352         } else {
 353                 blkbuf = allocate_buffer(blocks_at_once * block_size);
 354         }
 355         if (!blkbuf)
 356         {
 357                 com_err (program_name, ENOMEM, _("while allocating buffers"));
 358                 exit (1);
 359         }
 360         if (v_flag) {
 361             fprintf (stderr, _("Checking blocks %lu to %lu\n"), from_count,
 362                      last_block - 1);
 363         }
 364         if (t_flag) {
 365                 fputs(_("Checking for bad blocks in read-only mode\n"), stderr);
 366                 pattern_fill(blkbuf + blocks_at_once * block_size,
 367                              t_patts[0], block_size);
 368         }
 369         flush_bufs();
 370         try = blocks_at_once;
 371         currently_testing = from_count;
 372         num_blocks = last_block - 1;
 373         if (!t_flag && (s_flag || v_flag)) {
 374                 fputs(_("Checking for bad blocks (read-only test): "), stderr);
 375                 if (v_flag <= 1)
 376                         alarm_intr(SIGALRM);
 377         }
 378         while (currently_testing < last_block)
 379         {
 380                 if (next_bad) {
 381                         if (currently_testing == next_bad) {
 382                                 /* fprintf (out, "%lu\n", nextbad); */
 383                                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 384                                 currently_testing++;
 385                                 continue;
 386                         }
 387                         else if (currently_testing + try > next_bad)
 388                                 try = next_bad - currently_testing;
 389                 }
 390                 if (currently_testing + try > last_block)
 391                         try = last_block - currently_testing;
 392                 got = do_read (dev, blkbuf, try, block_size, currently_testing);
 393                 if (t_flag) {
 394                         /* test the comparison between all the
 395                            blocks successfully read  */
 396                         int i;
 397                         for (i = 0; i < got; ++i)
 398                                 if (memcmp (blkbuf+i*block_size,
 399                                             blkbuf+blocks_at_once*block_size,
 400                                             block_size))
 401                                         bb_count += bb_output(currently_testing + i);
 402                 }
 403                 currently_testing += got;
 404                 if (got == try) {
 405                         try = blocks_at_once;
 406                         /* recover page-aligned offset for O_DIRECT */
 407                         if ( blocks_at_once >= (unsigned long) (sys_page_size >> 9)
 408                              && (currently_testing % (sys_page_size >> 9)!= 0))
 409                                 try -= (sys_page_size >> 9)
 410                                         - (currently_testing
 411                                            % (sys_page_size >> 9));
 412                         continue;
 413                 }
 414                 else
 415                         try = 1;
 416                 if (got == 0) {
 417                         bb_count += bb_output(currently_testing++);
 418                 }
 419         }
 420         num_blocks = 0;
 421         alarm(0);
 422         if (s_flag || v_flag)
 423                 fputs(_(done_string), stderr);
 424
 425         fflush (stderr);
 426         free (blkbuf);
 427
 428         ext2fs_badblocks_list_iterate_end(bb_iter);
 429
 430         return bb_count;
 431 }
 432
 433 static unsigned int test_rw (int dev, unsigned long last_block,
 434                              int block_size, unsigned long from_count,
 435                              unsigned long blocks_at_once)
 436 {
 437         unsigned char *buffer, *read_buffer;
 438         const unsigned int patterns[] = {0xaa, 0x55, 0xff, 0x00};
 439         const unsigned int *pattern;
 440         int i, try, got, nr_pattern, pat_idx;
 441         unsigned int bb_count = 0;
 442
 443         buffer = allocate_buffer(2 * blocks_at_once * block_size);
 444         read_buffer = buffer + blocks_at_once * block_size;
 445
 446         if (!buffer) {
 447                 com_err (program_name, ENOMEM, _("while allocating buffers"));
 448                 exit (1);
 449         }
 450
 451         flush_bufs();
 452
 453         if (v_flag) {
 454                 fputs(_("Checking for bad blocks in read-write mode\n"),
 455                       stderr);
 456                 fprintf(stderr, _("From block %lu to %lu\n"),
 457                          from_count, last_block);
 458         }
 459         if (t_flag) {
 460                 pattern = t_patts;
 461                 nr_pattern = t_flag;
 462         } else {
 463                 pattern = patterns;
 464                 nr_pattern = sizeof(patterns) / sizeof(patterns[0]);
 465         }
 466         for (pat_idx = 0; pat_idx < nr_pattern; pat_idx++) {
 467                 pattern_fill(buffer, pattern[pat_idx],
 468                              blocks_at_once * block_size);
 469                 num_blocks = last_block - 1;
 470                 currently_testing = from_count;
 471                 if (s_flag && v_flag <= 1)
 472                         alarm_intr(SIGALRM);
 473
 474                 try = blocks_at_once;
 475                 while (currently_testing < last_block) {
 476                         if (currently_testing + try > last_block)
 477                                 try = last_block - currently_testing;
 478                         got = do_write(dev, buffer, try, block_size,
 479                                         currently_testing);
 480                         if (v_flag > 1)
 481                                 print_status();
 482
 483                         currently_testing += got;
 484                         if (got == try) {
 485                                 try = blocks_at_once;
 486                                 /* recover page-aligned offset for O_DIRECT */
 487                                 if ( blocks_at_once >= (unsigned long) (sys_page_size >> 9)
 488                                      && (currently_testing %
 489                                          (sys_page_size >> 9)!= 0))
 490                                         try -= (sys_page_size >> 9)
 491                                                 - (currently_testing
 492                                                    % (sys_page_size >> 9));
 493                                 continue;
 494                         } else
 495                                 try = 1;
 496                         if (got == 0) {
 497                                 bb_count += bb_output(currently_testing++);
 498                         }
 499                 }
 500
 501                 num_blocks = 0;
 502                 alarm (0);
 503                 if (s_flag | v_flag)
 504                         fputs(_(done_string), stderr);
 505                 flush_bufs();
 506                 if (s_flag | v_flag)
 507                         fputs(_("Reading and comparing: "), stderr);
 508                 num_blocks = last_block;
 509                 currently_testing = from_count;
 510                 if (s_flag && v_flag <= 1)
 511                         alarm_intr(SIGALRM);
 512
 513                 try = blocks_at_once;
 514                 while (currently_testing < last_block) {
 515                         if (currently_testing + try > last_block)
 516                                 try = last_block - currently_testing;
 517                         got = do_read (dev, read_buffer, try, block_size,
 518                                        currently_testing);
 519                         if (got == 0) {
 520                                 bb_count += bb_output(currently_testing++);
 521                                 continue;
 522                         }
 523                         for (i=0; i < got; i++) {
 524                                 if (memcmp(read_buffer + i * block_size,
 525                                            buffer + i * block_size,
 526                                            block_size))
 527                                         bb_count += bb_output(currently_testing+i);
 528                         }
 529                         currently_testing += got;
 530                         /* recover page-aligned offset for O_DIRECT */
 531                         if ( blocks_at_once >= (unsigned long) (sys_page_size >> 9)
 532                              && (currently_testing % (sys_page_size >> 9)!= 0))
 533                                 try = blocks_at_once - (sys_page_size >> 9)
 534                                         - (currently_testing
 535                                            % (sys_page_size >> 9));
 536                         else
 537                                 try = blocks_at_once;
 538                         if (v_flag > 1)
 539                                 print_status();
 540                 }
 541
 542                 num_blocks = 0;
 543                 alarm (0);
 544                 if (s_flag | v_flag)
 545                         fputs(_(done_string), stderr);
 546                 flush_bufs();
 547         }
 548         uncapture_terminate();
 549         free(buffer);
 550         return bb_count;
 551 }
 552
 553 struct saved_blk_record {
 554         blk_t   block;
 555         int     num;
 556 };
 557
 558 static unsigned int test_nd (int dev, unsigned long last_block,
 559                              int block_size, unsigned long from_count,
 560                              unsigned long blocks_at_once)
 561 {
 562         unsigned char *blkbuf, *save_ptr, *test_ptr, *read_ptr;
 563         unsigned char *test_base, *save_base, *read_base;
 564         int try, i;
 565         const unsigned int patterns[] = { ~0 };
 566         const unsigned int *pattern;
 567         int nr_pattern, pat_idx;
 568         long got, used2, written, save_currently_testing;
 569         struct saved_blk_record *test_record;
 570         /* This is static to prevent being clobbered by the longjmp */
 571         static int num_saved;
 572         jmp_buf terminate_env;
 573         errcode_t errcode;
 574         unsigned long buf_used;
 575         static unsigned int bb_count;
 576
 577         bb_count = 0;
 578         errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter);
 579         if (errcode) {
 580                 com_err (program_name, errcode,
 581                          _("while beginning bad block list iteration"));
 582                 exit (1);
 583         }
 584         do {
 585                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 586         } while (next_bad && next_bad < from_count);
 587
 588         blkbuf = allocate_buffer(3 * blocks_at_once * block_size);
 589         test_record = malloc (blocks_at_once*sizeof(struct saved_blk_record));
 590         if (!blkbuf || !test_record) {
 591                 com_err(program_name, ENOMEM, _("while allocating buffers"));
 592                 exit (1);
 593         }
 594
 595         save_base = blkbuf;
 596         test_base = blkbuf + (blocks_at_once * block_size);
 597         read_base = blkbuf + (2 * blocks_at_once * block_size);
 598
 599         num_saved = 0;
 600
 601         flush_bufs();
 602         if (v_flag) {
 603             fputs(_("Checking for bad blocks in non-destructive read-write mode\n"), stderr);
 604             fprintf (stderr, _("From block %lu to %lu\n"), from_count, last_block);
 605         }
 606         if (s_flag || v_flag > 1) {
 607                 fputs(_("Checking for bad blocks (non-destructive read-write test)\n"), stderr);
 608         }
 609         if (setjmp(terminate_env)) {
 610                 /*
 611                  * Abnormal termination by a signal is handled here.
 612                  */
 613                 signal (SIGALRM, SIG_IGN);
 614                 fputs(_("\nInterrupt caught, cleaning up\n"), stderr);
 615
 616                 save_ptr = save_base;
 617                 for (i=0; i < num_saved; i++) {
 618                         do_write(dev, save_ptr, test_record[i].num,
 619                                  block_size, test_record[i].block);
 620                         save_ptr += test_record[i].num * block_size;
 621                 }
 622                 fflush (out);
 623                 exit(1);
 624         }
 625
 626         /* set up abend handler */
 627         capture_terminate(terminate_env);
 628
 629         if (t_flag) {
 630                 pattern = t_patts;
 631                 nr_pattern = t_flag;
 632         } else {
 633                 pattern = patterns;
 634                 nr_pattern = sizeof(patterns) / sizeof(patterns[0]);
 635         }
 636         for (pat_idx = 0; pat_idx < nr_pattern; pat_idx++) {
 637                 pattern_fill(test_base, pattern[pat_idx],
 638                              blocks_at_once * block_size);
 639
 640                 buf_used = 0;
 641                 bb_count = 0;
 642                 save_ptr = save_base;
 643                 test_ptr = test_base;
 644                 currently_testing = from_count;
 645                 num_blocks = last_block - 1;
 646                 if (s_flag && v_flag <= 1)
 647                         alarm_intr(SIGALRM);
 648
 649                 while (currently_testing < last_block) {
 650                         got = try = blocks_at_once - buf_used;
 651                         if (next_bad) {
 652                                 if (currently_testing == next_bad) {
 653                                         /* fprintf (out, "%lu\n", nextbad); */
 654                                         ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 655                                         currently_testing++;
 656                                         goto check_for_more;
 657                                 }
 658                                 else if (currently_testing + try > next_bad)
 659                                         try = next_bad - currently_testing;
 660                         }
 661                         if (currently_testing + try > last_block)
 662                                 try = last_block - currently_testing;
 663                         got = do_read (dev, save_ptr, try, block_size,
 664                                        currently_testing);
 665                         if (got == 0) {
 666                                 /* First block must have been bad. */
 667                                 bb_count += bb_output(currently_testing++);
 668                                 goto check_for_more;
 669                         }
 670
 671                         /*
 672                          * Note the fact that we've saved this much data
 673                          * *before* we overwrite it with test data
 674                          */
 675                         test_record[num_saved].block = currently_testing;
 676                         test_record[num_saved].num = got;
 677                         num_saved++;
 678
 679                         /* Write the test data */
 680                         written = do_write (dev, test_ptr, got, block_size,
 681                                             currently_testing);
 682                         if (written != got)
 683                                 com_err (program_name, errno,
 684                                          _("during test data write, block %lu"),
 685                                          currently_testing + written);
 686
 687                         buf_used += got;
 688                         save_ptr += got * block_size;
 689                         test_ptr += got * block_size;
 690                         currently_testing += got;
 691                         if (got != try)
 692                                 bb_count += bb_output(currently_testing++);
 693
 694                 check_for_more:
 695                         /*
 696                          * If there's room for more blocks to be tested this
 697                          * around, and we're not done yet testing the disk, go
 698                          * back and get some more blocks.
 699                          */
 700                         if ((buf_used != blocks_at_once) &&
 701                             (currently_testing < last_block))
 702                                 continue;
 703
 704                         flush_bufs();
 705                         save_currently_testing = currently_testing;
 706
 707                         /*
 708                          * for each contiguous block that we read into the
 709                          * buffer (and wrote test data into afterwards), read
 710                          * it back (looping if necessary, to get past newly
 711                          * discovered unreadable blocks, of which there should
 712                          * be none, but with a hard drive which is unreliable,
 713                          * it has happened), and compare with the test data
 714                          * that was written; output to the bad block list if
 715                          * it doesn't match.
 716                          */
 717                         used2 = 0;
 718                         save_ptr = save_base;
 719                         test_ptr = test_base;
 720                         read_ptr = read_base;
 721                         try = 0;
 722
 723                         while (1) {
 724                                 if (try == 0) {
 725                                         if (used2 >= num_saved)
 726                                                 break;
 727                                         currently_testing = test_record[used2].block;
 728                                         try = test_record[used2].num;
 729                                         used2++;
 730                                 }
 731
 732                                 got = do_read (dev, read_ptr, try,
 733                                                block_size, currently_testing);
 734
 735                                 /* test the comparison between all the
 736                                    blocks successfully read  */
 737                                 for (i = 0; i < got; ++i)
 738                                         if (memcmp (test_ptr+i*block_size,
 739                                                     read_ptr+i*block_size, block_size))
 740                                                 bb_count += bb_output(currently_testing + i);
 741                                 if (got < try) {
 742                                         bb_count += bb_output(currently_testing + got);
 743                                         got++;
 744                                 }
 745
 746                                 /* write back original data */
 747                                 do_write (dev, save_ptr, got,
 748                                           block_size, currently_testing);
 749                                 save_ptr += got * block_size;
 750
 751                                 currently_testing += got;
 752                                 test_ptr += got * block_size;
 753                                 read_ptr += got * block_size;
 754                                 try -= got;
 755                         }
 756
 757                         /* empty the buffer so it can be reused */
 758                         num_saved = 0;
 759                         buf_used = 0;
 760                         save_ptr = save_base;
 761                         test_ptr = test_base;
 762                         currently_testing = save_currently_testing;
 763                 }
 764                 num_blocks = 0;
 765                 alarm(0);
 766                 if (s_flag || v_flag > 1)
 767                         fputs(_(done_string), stderr);
 768
 769                 flush_bufs();
 770         }
 771         uncapture_terminate();
 772         fflush(stderr);
 773         free(blkbuf);
 774         free(test_record);
 775
 776         ext2fs_badblocks_list_iterate_end(bb_iter);
 777
 778         return bb_count;
 779 }
 780
 781 static void check_mount(char *device_name)
 782 {
 783         errcode_t       retval;
 784         int             mount_flags;
 785
 786         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
 787         if (retval) {
 788                 com_err("ext2fs_check_if_mount", retval,
 789                         _("while determining whether %s is mounted."),
 790                         device_name);
 791                 return;
 792         }
 793         if (mount_flags & EXT2_MF_MOUNTED) {
 794                 fprintf(stderr, _("%s is mounted; "), device_name);
 795                 if (force) {
 796                         fputs(_("badblocks forced anyway.  "
 797                                 "Hope /etc/mtab is incorrect.\n"), stderr);
 798                         return;
 799                 }
 800         abort_badblocks:
 801                 fputs(_("it's not safe to run badblocks!\n"), stderr);
 802                 exit(1);
 803         }
 804
 805         if ((mount_flags & EXT2_MF_BUSY) && !exclusive_ok) {
 806                 fprintf(stderr, _("%s is apparently in use by the system; "),
 807                         device_name);
 808                 if (force)
 809                         fputs(_("badblocks forced anyway.\n"), stderr);
 810                 else
 811                         goto abort_badblocks;
 812         }
 813
 814 }
 815
 816
 817 int main (int argc, char ** argv)
 818 {
 819         int c;
 820         char * tmp;
 821         char * device_name;
 822         char * host_device_name = NULL;
 823         char * input_file = NULL;
 824         char * output_file = NULL;
 825         FILE * in = NULL;
 826         int block_size = 1024;
 827         unsigned long blocks_at_once = 64;
 828         blk_t last_block, from_count;
 829         int num_passes = 0;
 830         int passes_clean = 0;
 831         int dev;
 832         errcode_t errcode;
 833         unsigned int pattern;
 834         unsigned int (*test_func)(int, unsigned long,
 835                                   int, unsigned long,
 836                                   unsigned long);
 837         int open_flag = 0;
 838         long sysval;
 839
 840         setbuf(stdout, NULL);
 841         setbuf(stderr, NULL);
 842 #ifdef ENABLE_NLS
 843         setlocale(LC_MESSAGES, "");
 844         setlocale(LC_CTYPE, "");
 845         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 846         textdomain(NLS_CAT_NAME);
 847 #endif
 848         srandom((unsigned int)time(NULL));  /* simple randomness is enough */
 849         test_func = test_ro;
 850
 851         /* Determine the system page size if possible */
 852 #ifdef HAVE_SYSCONF
 853 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
 854 #define _SC_PAGESIZE _SC_PAGE_SIZE
 855 #endif
 856 #ifdef _SC_PAGESIZE
 857         sysval = sysconf(_SC_PAGESIZE);
 858         if (sysval > 0)
 859                 sys_page_size = sysval;
 860 #endif /* _SC_PAGESIZE */
 861 #endif /* HAVE_SYSCONF */
 862
 863         if (argc && *argv)
 864                 program_name = *argv;
 865         while ((c = getopt (argc, argv, "b:fi:o:svwnc:p:h:t:X")) != EOF) {
 866                 switch (c) {
 867                 case 'b':
 868                         block_size = strtoul (optarg, &tmp, 0);
 869                         if (*tmp || block_size > 4096) {
 870                                 com_err (program_name, 0,
 871                                          _("bad block size - %s"), optarg);
 872                                 exit (1);
 873                         }
 874                         break;
 875                 case 'f':
 876                         force++;
 877                         break;
 878                 case 'i':
 879                         input_file = optarg;
 880                         break;
 881                 case 'o':
 882                         output_file = optarg;
 883                         break;
 884                 case 's':
 885                         s_flag = 1;
 886                         break;
 887                 case 'v':
 888                         v_flag++;
 889                         break;
 890                 case 'w':
 891                         if (w_flag)
 892                                 exclusive_usage();
 893                         test_func = test_rw;
 894                         w_flag = 1;
 895                         break;
 896                 case 'n':
 897                         if (w_flag)
 898                                 exclusive_usage();
 899                         test_func = test_nd;
 900                         w_flag = 2;
 901                         break;
 902                 case 'c':
 903                         blocks_at_once = strtoul (optarg, &tmp, 0);
 904                         if (*tmp) {
 905                                 com_err (program_name, 0,
 906                                          "bad simultaneous block count - %s", optarg);
 907                                 exit (1);
 908                         }
 909                         break;
 910                 case 'p':
 911                         num_passes = strtoul (optarg, &tmp, 0);
 912                         if (*tmp) {
 913                                 com_err (program_name, 0,
 914                                     "bad number of clean passes - %s", optarg);
 915                                 exit (1);
 916                         }
 917                         break;
 918                 case 'h':
 919                         host_device_name = optarg;
 920                         break;
 921                 case 't':
 922                         if (t_flag + 1 > t_max) {
 923                                 unsigned int *t_patts_new;
 924
 925                                 t_patts_new = realloc(t_patts, t_max + T_INC);
 926                                 if (!t_patts_new) {
 927                                         com_err(program_name, ENOMEM,
 928                                                 _("can't allocate memory for "
 929                                                   "test_pattern - %s"),
 930                                                 optarg);
 931                                         exit(1);
 932                                 }
 933                                 t_patts = t_patts_new;
 934                                 t_max += T_INC;
 935                         }
 936                         if (!strcmp(optarg, "r") || !strcmp(optarg,"random")) {
 937                                 t_patts[t_flag++] = ~0;
 938                         } else {
 939                                 pattern = strtoul(optarg, &tmp, 0);
 940                                 if (*tmp) {
 941                                         com_err(program_name, 0,
 942                                         _("invalid test_pattern: %s\n"),
 943                                                 optarg);
 944                                         exit(1);
 945                                 }
 946                                 if (pattern == (unsigned int) ~0)
 947                                         pattern = 0xffff;
 948                                 t_patts[t_flag++] = pattern;
 949                         }
 950                         break;
 951                 case 'X':
 952                         exclusive_ok++;
 953                         break;
 954                 default:
 955                         usage();
 956                 }
 957         }
 958         if (!w_flag) {
 959                 if (t_flag > 1) {
 960                         com_err(program_name, 0,
 961                         _("Maximum of one test_pattern may be specified "
 962                           "in read-only mode"));
 963                         exit(1);
 964                 }
 965                 if (t_patts && (t_patts[0] == (unsigned int) ~0)) {
 966                         com_err(program_name, 0,
 967                         _("Random test_pattern is not allowed "
 968                           "in read-only mode"));
 969                         exit(1);
 970                 }
 971         }
 972         if (optind > argc - 1)
 973                 usage();
 974         device_name = argv[optind++];
 975         if (optind > argc - 1) {
 976                 errcode = ext2fs_get_device_size(device_name,
 977                                                  block_size,
 978                                                  &last_block);
 979                 if (errcode == EXT2_ET_UNIMPLEMENTED) {
 980                         com_err(program_name, 0,
 981                                 _("Couldn't determine device size; you "
 982                                   "must specify\nthe size manually\n"));
 983                         exit(1);
 984                 }
 985                 if (errcode) {
 986                         com_err(program_name, errcode,
 987                                 _("while trying to determine device size"));
 988                         exit(1);
 989                 }
 990         } else {
 991                 errno = 0;
 992                 last_block = strtoul (argv[optind], &tmp, 0);
 993                 printf("last_block = %d (%s)\n", last_block, argv[optind]);
 994                 if (*tmp || errno ||
 995                     (last_block == ULONG_MAX && errno == ERANGE)) {
 996                         com_err (program_name, 0, _("invalid blocks count - %s"),
 997                                  argv[optind]);
 998                         exit (1);
 999                 }
1000                 last_block++;
1001                 optind++;
1002         }
1003         if (optind <= argc-1) {
1004                 errno = 0;
1005                 from_count = strtoul (argv[optind], &tmp, 0);
1006                 printf("from_count = %d\n", from_count);
1007                 if (*tmp || errno ||
1008                     (from_count == ULONG_MAX && errno == ERANGE)) {
1009                         com_err (program_name, 0, _("invalid starting block - %s"),
1010                                  argv[optind]);
1011                         exit (1);
1012                 }
1013         } else from_count = 0;
1014         if (from_count >= last_block) {
1015             com_err (program_name, 0, _("invalid starting block (%lu): must be less than %lu"),
1016                      (unsigned long) from_count, (unsigned long) last_block);
1017             exit (1);
1018         }
1019         if (w_flag)
1020                 check_mount(device_name);
1021
1022         open_flag = w_flag ? O_RDWR : O_RDONLY;
1023         dev = open (device_name, open_flag);
1024         if (dev == -1) {
1025                 com_err (program_name, errno, _("while trying to open %s"),
1026                          device_name);
1027                 exit (1);
1028         }
1029         if (host_device_name) {
1030                 host_dev = open (host_device_name, open_flag);
1031                 if (host_dev == -1) {
1032                         com_err (program_name, errno,
1033                                  _("while trying to open %s"),
1034                                  host_device_name);
1035                         exit (1);
1036                 }
1037         } else
1038                 host_dev = dev;
1039         if (input_file) {
1040                 if (strcmp (input_file, "-") == 0)
1041                         in = stdin;
1042                 else {
1043                         in = fopen (input_file, "r");
1044                         if (in == NULL)
1045                         {
1046                                 com_err (program_name, errno,
1047                                          _("while trying to open %s"),
1048                                          input_file);
1049                                 exit (1);
1050                         }
1051                 }
1052         }
1053         if (output_file && strcmp (output_file, "-") != 0)
1054         {
1055                 out = fopen (output_file, "w");
1056                 if (out == NULL)
1057                 {
1058                         com_err (program_name, errno,
1059                                  _("while trying to open %s"),
1060                                  output_file);
1061                         exit (1);
1062                 }
1063         }
1064         else
1065                 out = stdout;
1066
1067         errcode = ext2fs_badblocks_list_create(&bb_list,0);
1068         if (errcode) {
1069                 com_err (program_name, errcode,
1070                          _("while creating in-memory bad blocks list"));
1071                 exit (1);
1072         }
1073
1074         if (in) {
1075                 for(;;) {
1076                         switch(fscanf (in, "%u\n", &next_bad)) {
1077                                 case 0:
1078                                         com_err (program_name, 0, "input file - bad format");
1079                                         exit (1);
1080                                 case EOF:
1081                                         break;
1082                                 default:
1083                                         errcode = ext2fs_badblocks_list_add(bb_list,next_bad);
1084                                         if (errcode) {
1085                                                 com_err (program_name, errcode, _("while adding to in-memory bad block list"));
1086                                                 exit (1);
1087                                         }
1088                                         continue;
1089                         }
1090                         break;
1091                 }
1092
1093                 if (in != stdin)
1094                         fclose (in);
1095         }
1096
1097         do {
1098                 unsigned int bb_count;
1099
1100                 bb_count = test_func(dev, last_block, block_size,
1101                                      from_count, blocks_at_once);
1102                 if (bb_count)
1103                         passes_clean = 0;
1104                 else
1105                         ++passes_clean;
1106
1107                 if (v_flag)
1108                         fprintf(stderr,
1109                                 _("Pass completed, %u bad blocks found.\n"),
1110                                 bb_count);
1111
1112         } while (passes_clean < num_passes);
1113
1114         close (dev);
1115         if (out != stdout)
1116                 fclose (out);
1117         if (t_patts)
1118                 free(t_patts);
1119         return 0;
1120 }
1121