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                          unsigned long current_block)
 193 {
 194 #ifdef O_DIRECT
 195         int new_flag = O_DIRECT;
 196         int flag;
 197
 198         if ((((unsigned long) buffer & (sys_page_size - 1)) != 0) ||
 199             ((size & (sys_page_size - 1)) != 0) ||
 200             ((current_block & ((sys_page_size >> 9)-1)) != 0))
 201                 new_flag = 0;
 202
 203         if (new_flag != current_O_DIRECT) {
 204              /* printf("%s O_DIRECT\n", new_flag ? "Setting" : "Clearing"); */
 205                 flag = fcntl(dev, F_GETFL);
 206                 if (flag > 0) {
 207                         flag = (flag & ~O_DIRECT) | new_flag;
 208                         fcntl(dev, F_SETFL, flag);
 209                 }
 210                 current_O_DIRECT = new_flag;
 211         }
 212 #endif
 213 }
 214
 215
 216 static void pattern_fill(unsigned char *buffer, unsigned long pattern,
 217                          size_t n)
 218 {
 219         int     i, nb;
 220         unsigned char   bpattern[sizeof(pattern)], *ptr;
 221
 222         if (pattern == ~0) {
 223                 for (ptr = buffer; ptr < buffer + n; ptr++) {
 224                         (*ptr) = random() % (1 << (8 * sizeof(char)));
 225                 }
 226                 if (s_flag | v_flag)
 227                         fprintf(stderr, _("Testing with random pattern: "));
 228         } else {
 229                 bpattern[0] = 0;
 230                 for (i = 0; i < sizeof(bpattern); i++) {
 231                         if (pattern == 0)
 232                                 break;
 233                         bpattern[i] = pattern & 0xFF;
 234                         pattern = pattern >> 8;
 235                 }
 236                 nb = i ? (i-1) : 0;
 237                 for (ptr = buffer, i = nb; ptr < buffer + n; ptr++) {
 238                         *ptr = bpattern[i--];
 239                         if (i < 0)
 240                                 i = nb;
 241                 }
 242                 if (s_flag | v_flag) {
 243                         fprintf(stderr, _("Testing with pattern 0x"));
 244                         for (i = 0; i <= nb; i++)
 245                                 fprintf(stderr, "%02x", buffer[i]);
 246                         fprintf(stderr, ": ");
 247                 }
 248         }
 249 }
 250
 251 /*
 252  * Perform a read of a sequence of blocks; return the number of blocks
 253  *    successfully sequentially read.
 254  */
 255 static long do_read (int dev, unsigned char * buffer, int try, int block_size,
 256                      unsigned long current_block)
 257 {
 258         long got;
 259
 260         set_o_direct(dev, buffer, try * block_size, current_block);
 261
 262         if (v_flag > 1)
 263                 print_status();
 264
 265         /* Seek to the correct loc. */
 266         if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size,
 267                          SEEK_SET) != (ext2_loff_t) current_block * block_size)
 268                 com_err (program_name, errno, _("during seek"));
 269
 270         /* Try the read */
 271         got = read (dev, buffer, try * block_size);
 272         if (got < 0)
 273                 got = 0;
 274         if (got & 511)
 275                 fprintf(stderr, _("Weird value (%ld) in do_read\n"), got);
 276         got /= block_size;
 277         return got;
 278 }
 279
 280 /*
 281  * Perform a write of a sequence of blocks; return the number of blocks
 282  *    successfully sequentially written.
 283  */
 284 static long do_write (int dev, unsigned char * buffer, int try, int block_size,
 285                      unsigned long current_block)
 286 {
 287         long got;
 288
 289         set_o_direct(dev, buffer, try * block_size, current_block);
 290
 291         if (v_flag > 1)
 292                 print_status();
 293
 294         /* Seek to the correct loc. */
 295         if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size,
 296                          SEEK_SET) != (ext2_loff_t) current_block * block_size)
 297                 com_err (program_name, errno, _("during seek"));
 298
 299         /* Try the write */
 300         got = write (dev, buffer, try * block_size);
 301         if (got < 0)
 302                 got = 0;
 303         if (got & 511)
 304                 fprintf (stderr,
 305                          "Weird value (%ld) in do_write\n", got);
 306         got /= block_size;
 307         return got;
 308 }
 309
 310 static int host_dev;
 311
 312 static void flush_bufs(void)
 313 {
 314         errcode_t       retval;
 315
 316         retval = ext2fs_sync_device(host_dev, 1);
 317         if (retval)
 318                 com_err(program_name, retval, _("during ext2fs_sync_device"));
 319 }
 320
 321 static unsigned int test_ro (int dev, unsigned long last_block,
 322                              int block_size, unsigned long from_count,
 323                              unsigned long blocks_at_once)
 324 {
 325         unsigned char * blkbuf;
 326         int try;
 327         long got;
 328         unsigned int bb_count = 0;
 329         errcode_t errcode;
 330
 331         errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter);
 332         if (errcode) {
 333                 com_err (program_name, errcode,
 334                          _("while beginning bad block list iteration"));
 335                 exit (1);
 336         }
 337         do {
 338                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 339         } while (next_bad && next_bad < from_count);
 340
 341         if (t_flag) {
 342                 blkbuf = allocate_buffer((blocks_at_once + 1) * block_size);
 343         } else {
 344                 blkbuf = allocate_buffer(blocks_at_once * block_size);
 345         }
 346         if (!blkbuf)
 347         {
 348                 com_err (program_name, ENOMEM, _("while allocating buffers"));
 349                 exit (1);
 350         }
 351         if (v_flag) {
 352             fprintf (stderr, _("Checking blocks %lu to %lu\n"), from_count,
 353                      last_block);
 354         }
 355         if (t_flag) {
 356                 fprintf(stderr, _("Checking for bad blocks in read-only mode\n"));
 357                 pattern_fill(blkbuf + blocks_at_once * block_size,
 358                              t_patts[0], block_size);
 359         }
 360         flush_bufs();
 361         try = blocks_at_once;
 362         currently_testing = from_count;
 363         num_blocks = last_block;
 364         if (!t_flag && (s_flag || v_flag)) {
 365                 fprintf(stderr,
 366                         _("Checking for bad blocks (read-only test): "));
 367                 if (v_flag <= 1)
 368                         alarm_intr(SIGALRM);
 369         }
 370         while (currently_testing < last_block)
 371         {
 372                 if (next_bad) {
 373                         if (currently_testing == next_bad) {
 374                                 /* fprintf (out, "%lu\n", nextbad); */
 375                                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 376                                 currently_testing++;
 377                                 continue;
 378                         }
 379                         else if (currently_testing + try > next_bad)
 380                                 try = next_bad - currently_testing;
 381                 }
 382                 if (currently_testing + try > last_block)
 383                         try = last_block - currently_testing;
 384                 got = do_read (dev, blkbuf, try, block_size, currently_testing);
 385                 if (t_flag) {
 386                         /* test the comparison between all the
 387                            blocks successfully read  */
 388                         int i;
 389                         for (i = 0; i < got; ++i)
 390                                 if (memcmp (blkbuf+i*block_size,
 391                                             blkbuf+blocks_at_once*block_size,
 392                                             block_size))
 393                                         bb_count += bb_output(currently_testing + i);
 394                 }
 395                 currently_testing += got;
 396                 if (got == try) {
 397                         try = blocks_at_once;
 398                         /* recover page-aligned offset for O_DIRECT */
 399                         if ( blocks_at_once >= (sys_page_size >> 9)
 400                              && (currently_testing % (sys_page_size >> 9)!= 0))
 401                                 try -= (sys_page_size >> 9)
 402                                         - (currently_testing
 403                                            % (sys_page_size >> 9));
 404                         continue;
 405                 }
 406                 else
 407                         try = 1;
 408                 if (got == 0) {
 409                         bb_count += bb_output(currently_testing++);
 410                 }
 411         }
 412         num_blocks = 0;
 413         alarm(0);
 414         if (s_flag || v_flag)
 415                 fputs(done_string, stderr);
 416
 417         fflush (stderr);
 418         free (blkbuf);
 419
 420         ext2fs_badblocks_list_iterate_end(bb_iter);
 421
 422         return bb_count;
 423 }
 424
 425 static unsigned int test_rw (int dev, unsigned long last_block,
 426                              int block_size, unsigned long from_count,
 427                              unsigned long blocks_at_once)
 428 {
 429         unsigned char *buffer, *read_buffer;
 430         const unsigned long patterns[] = {0xaa, 0x55, 0xff, 0x00};
 431         const unsigned long *pattern;
 432         int i, try, got, nr_pattern, pat_idx;
 433         unsigned int bb_count = 0;
 434
 435         buffer = allocate_buffer(2 * blocks_at_once * block_size);
 436         read_buffer = buffer + blocks_at_once * block_size;
 437
 438         if (!buffer) {
 439                 com_err (program_name, ENOMEM, _("while allocating buffers"));
 440                 exit (1);
 441         }
 442
 443         flush_bufs();
 444
 445         if (v_flag) {
 446                 fprintf(stderr,
 447                         _("Checking for bad blocks in read-write mode\n"));
 448                 fprintf(stderr, _("From block %lu to %lu\n"),
 449                          from_count, last_block);
 450         }
 451         if (t_flag) {
 452                 pattern = t_patts;
 453                 nr_pattern = t_flag;
 454         } else {
 455                 pattern = patterns;
 456                 nr_pattern = sizeof(patterns) / sizeof(patterns[0]);
 457         }
 458         for (pat_idx = 0; pat_idx < nr_pattern; pat_idx++) {
 459                 pattern_fill(buffer, pattern[pat_idx],
 460                              blocks_at_once * block_size);
 461                 num_blocks = last_block;
 462                 currently_testing = from_count;
 463                 if (s_flag && v_flag <= 1)
 464                         alarm_intr(SIGALRM);
 465
 466                 try = blocks_at_once;
 467                 while (currently_testing < last_block) {
 468                         if (currently_testing + try > last_block)
 469                                 try = last_block - currently_testing;
 470                         got = do_write(dev, buffer, try, block_size,
 471                                         currently_testing);
 472                         if (v_flag > 1)
 473                                 print_status();
 474
 475                         currently_testing += got;
 476                         if (got == try) {
 477                                 try = blocks_at_once;
 478                                 /* recover page-aligned offset for O_DIRECT */
 479                                 if ( blocks_at_once >= (sys_page_size >> 9)
 480                                      && (currently_testing %
 481                                          (sys_page_size >> 9)!= 0))
 482                                         try -= (sys_page_size >> 9)
 483                                                 - (currently_testing
 484                                                    % (sys_page_size >> 9));
 485                                 continue;
 486                         } else
 487                                 try = 1;
 488                         if (got == 0) {
 489                                 bb_count += bb_output(currently_testing++);
 490                         }
 491                 }
 492
 493                 num_blocks = 0;
 494                 alarm (0);
 495                 if (s_flag | v_flag)
 496                         fputs(done_string, stderr);
 497                 flush_bufs();
 498                 if (s_flag | v_flag)
 499                         fprintf (stderr, _("Reading and comparing: "));
 500                 num_blocks = last_block;
 501                 currently_testing = from_count;
 502                 if (s_flag && v_flag <= 1)
 503                         alarm_intr(SIGALRM);
 504
 505                 try = blocks_at_once;
 506                 while (currently_testing < last_block) {
 507                         if (currently_testing + try > last_block)
 508                                 try = last_block - currently_testing;
 509                         got = do_read (dev, read_buffer, try, block_size,
 510                                        currently_testing);
 511                         if (got == 0) {
 512                                 bb_count += bb_output(currently_testing++);
 513                                 continue;
 514                         }
 515                         for (i=0; i < got; i++) {
 516                                 if (memcmp(read_buffer + i * block_size,
 517                                            buffer + i * block_size,
 518                                            block_size))
 519                                         bb_count += bb_output(currently_testing+i);
 520                         }
 521                         currently_testing += got;
 522                         /* recover page-aligned offset for O_DIRECT */
 523                         if ( blocks_at_once >= (sys_page_size >> 9)
 524                              && (currently_testing % (sys_page_size >> 9)!= 0))
 525                                 try = blocks_at_once - (sys_page_size >> 9)
 526                                         - (currently_testing
 527                                            % (sys_page_size >> 9));
 528                         else
 529                                 try = blocks_at_once;
 530                         if (v_flag > 1)
 531                                 print_status();
 532                 }
 533
 534                 num_blocks = 0;
 535                 alarm (0);
 536                 if (s_flag | v_flag)
 537                         fputs(done_string, stderr);
 538                 flush_bufs();
 539         }
 540         uncapture_terminate();
 541         free(buffer);
 542         return bb_count;
 543 }
 544
 545 struct saved_blk_record {
 546         blk_t   block;
 547         int     num;
 548 };
 549
 550 static unsigned int test_nd (int dev, unsigned long last_block,
 551                              int block_size, unsigned long from_count,
 552                              unsigned long blocks_at_once)
 553 {
 554         unsigned char *blkbuf, *save_ptr, *test_ptr, *read_ptr;
 555         unsigned char *test_base, *save_base, *read_base;
 556         int try, i;
 557         const unsigned long patterns[] = { ~0 };
 558         const unsigned long *pattern;
 559         int nr_pattern, pat_idx;
 560         long got, used2, written, save_currently_testing;
 561         struct saved_blk_record *test_record;
 562         /* This is static to prevent being clobbered by the longjmp */
 563         static int num_saved;
 564         jmp_buf terminate_env;
 565         errcode_t errcode;
 566         long buf_used;
 567         unsigned int bb_count = 0;
 568
 569         errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter);
 570         if (errcode) {
 571                 com_err (program_name, errcode,
 572                          _("while beginning bad block list iteration"));
 573                 exit (1);
 574         }
 575         do {
 576                 ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 577         } while (next_bad && next_bad < from_count);
 578
 579         blkbuf = allocate_buffer(3 * blocks_at_once * block_size);
 580         test_record = malloc (blocks_at_once*sizeof(struct saved_blk_record));
 581         if (!blkbuf || !test_record) {
 582                 com_err(program_name, ENOMEM, _("while allocating buffers"));
 583                 exit (1);
 584         }
 585
 586         save_base = blkbuf;
 587         test_base = blkbuf + (blocks_at_once * block_size);
 588         read_base = blkbuf + (2 * blocks_at_once * block_size);
 589
 590         num_saved = 0;
 591
 592         flush_bufs();
 593         if (v_flag) {
 594             fprintf (stderr,
 595                      _("Checking for bad blocks in non-destructive read-write mode\n"));
 596             fprintf (stderr, _("From block %lu to %lu\n"), from_count, last_block);
 597         }
 598         if (s_flag || v_flag > 1) {
 599                 fprintf(stderr, _("Checking for bad blocks (non-destructive read-write test)\n"));
 600         }
 601         if (setjmp(terminate_env)) {
 602                 /*
 603                  * Abnormal termination by a signal is handled here.
 604                  */
 605                 signal (SIGALRM, SIG_IGN);
 606                 fprintf(stderr, _("\nInterrupt caught, cleaning up\n"));
 607
 608                 save_ptr = save_base;
 609                 for (i=0; i < num_saved; i++) {
 610                         do_write(dev, save_ptr, test_record[i].num,
 611                                  block_size, test_record[i].block);
 612                         save_ptr += test_record[i].num * block_size;
 613                 }
 614                 fflush (out);
 615                 exit(1);
 616         }
 617
 618         /* set up abend handler */
 619         capture_terminate(terminate_env);
 620
 621         if (t_flag) {
 622                 pattern = t_patts;
 623                 nr_pattern = t_flag;
 624         } else {
 625                 pattern = patterns;
 626                 nr_pattern = sizeof(patterns) / sizeof(patterns[0]);
 627         }
 628         for (pat_idx = 0; pat_idx < nr_pattern; pat_idx++) {
 629                 pattern_fill(test_base, pattern[pat_idx],
 630                              blocks_at_once * block_size);
 631
 632                 buf_used = 0;
 633                 bb_count = 0;
 634                 save_ptr = save_base;
 635                 test_ptr = test_base;
 636                 currently_testing = from_count;
 637                 num_blocks = last_block;
 638                 if (s_flag && v_flag <= 1)
 639                         alarm_intr(SIGALRM);
 640
 641                 while (currently_testing < last_block) {
 642                         got = try = blocks_at_once - buf_used;
 643                         if (next_bad) {
 644                                 if (currently_testing == next_bad) {
 645                                         /* fprintf (out, "%lu\n", nextbad); */
 646                                         ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
 647                                         currently_testing++;
 648                                         goto check_for_more;
 649                                 }
 650                                 else if (currently_testing + try > next_bad)
 651                                         try = next_bad - currently_testing;
 652                         }
 653                         if (currently_testing + try > last_block)
 654                                 try = last_block - currently_testing;
 655                         got = do_read (dev, save_ptr, try, block_size,
 656                                        currently_testing);
 657                         if (got == 0) {
 658                                 /* First block must have been bad. */
 659                                 bb_count += bb_output(currently_testing++);
 660                                 goto check_for_more;
 661                         }
 662
 663                         /*
 664                          * Note the fact that we've saved this much data
 665                          * *before* we overwrite it with test data
 666                          */
 667                         test_record[num_saved].block = currently_testing;
 668                         test_record[num_saved].num = got;
 669                         num_saved++;
 670
 671                         /* Write the test data */
 672                         written = do_write (dev, test_ptr, got, block_size,
 673                                             currently_testing);
 674                         if (written != got)
 675                                 com_err (program_name, errno,
 676                                          _("during test data write, block %lu"),
 677                                          currently_testing + written);
 678
 679                         buf_used += got;
 680                         save_ptr += got * block_size;
 681                         test_ptr += got * block_size;
 682                         currently_testing += got;
 683                         if (got != try)
 684                                 bb_count += bb_output(currently_testing++);
 685
 686                 check_for_more:
 687                         /*
 688                          * If there's room for more blocks to be tested this
 689                          * around, and we're not done yet testing the disk, go
 690                          * back and get some more blocks.
 691                          */
 692                         if ((buf_used != blocks_at_once) &&
 693                             (currently_testing < last_block))
 694                                 continue;
 695
 696                         flush_bufs();
 697                         save_currently_testing = currently_testing;
 698
 699                         /*
 700                          * for each contiguous block that we read into the
 701                          * buffer (and wrote test data into afterwards), read
 702                          * it back (looping if necessary, to get past newly
 703                          * discovered unreadable blocks, of which there should
 704                          * be none, but with a hard drive which is unreliable,
 705                          * it has happened), and compare with the test data
 706                          * that was written; output to the bad block list if
 707                          * it doesn't match.
 708                          */
 709                         used2 = 0;
 710                         save_ptr = save_base;
 711                         test_ptr = test_base;
 712                         read_ptr = read_base;
 713                         try = 0;
 714
 715                         while (1) {
 716                                 if (try == 0) {
 717                                         if (used2 >= num_saved)
 718                                                 break;
 719                                         currently_testing = test_record[used2].block;
 720                                         try = test_record[used2].num;
 721                                         used2++;
 722                                 }
 723
 724                                 got = do_read (dev, read_ptr, try,
 725                                                block_size, currently_testing);
 726
 727                                 /* test the comparison between all the
 728                                    blocks successfully read  */
 729                                 for (i = 0; i < got; ++i)
 730                                         if (memcmp (test_ptr+i*block_size,
 731                                                     read_ptr+i*block_size, block_size))
 732                                                 bb_count += bb_output(currently_testing + i);
 733                                 if (got < try) {
 734                                         bb_count += bb_output(currently_testing + got);
 735                                         got++;
 736                                 }
 737
 738                                 /* write back original data */
 739                                 do_write (dev, save_ptr, got,
 740                                           block_size, currently_testing);
 741                                 save_ptr += got * block_size;
 742
 743                                 currently_testing += got;
 744                                 test_ptr += got * block_size;
 745                                 read_ptr += got * block_size;
 746                                 try -= got;
 747                         }
 748
 749                         /* empty the buffer so it can be reused */
 750                         num_saved = 0;
 751                         buf_used = 0;
 752                         save_ptr = save_base;
 753                         test_ptr = test_base;
 754                         currently_testing = save_currently_testing;
 755                 }
 756                 num_blocks = 0;
 757                 alarm(0);
 758                 if (s_flag || v_flag > 1)
 759                         fputs(done_string, stderr);
 760
 761                 flush_bufs();
 762         }
 763         uncapture_terminate();
 764         fflush(stderr);
 765         free(blkbuf);
 766         free(test_record);
 767
 768         ext2fs_badblocks_list_iterate_end(bb_iter);
 769
 770         return bb_count;
 771 }
 772
 773 static void check_mount(char *device_name)
 774 {
 775         errcode_t       retval;
 776         int             mount_flags;
 777
 778         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
 779         if (retval) {
 780                 com_err("ext2fs_check_if_mount", retval,
 781                         _("while determining whether %s is mounted."),
 782                         device_name);
 783                 return;
 784         }
 785         if (!(mount_flags & EXT2_MF_MOUNTED))
 786                 return;
 787
 788         fprintf(stderr, _("%s is mounted; "), device_name);
 789         if (force) {
 790                 fprintf(stderr, _("badblocks forced anyway.  "
 791                         "Hope /etc/mtab is incorrect.\n"));
 792                 return;
 793         }
 794         fprintf(stderr, _("it's not safe to run badblocks!\n"));
 795         exit(1);
 796 }
 797
 798
 799 int main (int argc, char ** argv)
 800 {
 801         int c;
 802         char * tmp;
 803         char * device_name;
 804         char * host_device_name = NULL;
 805         char * input_file = NULL;
 806         char * output_file = NULL;
 807         FILE * in = NULL;
 808         int block_size = 1024;
 809         unsigned long blocks_at_once = 16;
 810         blk_t last_block, from_count;
 811         int num_passes = 0;
 812         int passes_clean = 0;
 813         int dev;
 814         errcode_t errcode;
 815         unsigned long pattern;
 816         unsigned int (*test_func)(int, unsigned long,
 817                                   int, unsigned long,
 818                                   unsigned long);
 819         int open_flag = 0;
 820         long sysval;
 821
 822         setbuf(stdout, NULL);
 823         setbuf(stderr, NULL);
 824 #ifdef ENABLE_NLS
 825         setlocale(LC_MESSAGES, "");
 826         setlocale(LC_CTYPE, "");
 827         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 828         textdomain(NLS_CAT_NAME);
 829 #endif
 830         srandom((unsigned int)time(NULL));  /* simple randomness is enough */
 831         test_func = test_ro;
 832
 833         /* Determine the system page size if possible */
 834 #ifdef HAVE_SYSCONF
 835 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
 836 #define _SC_PAGESIZE _SC_PAGE_SIZE
 837 #endif
 838 #ifdef _SC_PAGESIZE
 839         sysval = sysconf(_SC_PAGESIZE);
 840         if (sysval > 0)
 841                 sys_page_size = sysval;
 842 #endif /* _SC_PAGESIZE */
 843 #endif /* HAVE_SYSCONF */
 844
 845         if (argc && *argv)
 846                 program_name = *argv;
 847         while ((c = getopt (argc, argv, "b:fi:o:svwnc:p:h:t:")) != EOF) {
 848                 switch (c) {
 849                 case 'b':
 850                         block_size = strtoul (optarg, &tmp, 0);
 851                         if (*tmp || block_size > 4096) {
 852                                 com_err (program_name, 0,
 853                                          _("bad block size - %s"), optarg);
 854                                 exit (1);
 855                         }
 856                         break;
 857                 case 'f':
 858                         force++;
 859                         break;
 860                 case 'i':
 861                         input_file = optarg;
 862                         break;
 863                 case 'o':
 864                         output_file = optarg;
 865                         break;
 866                 case 's':
 867                         s_flag = 1;
 868                         break;
 869                 case 'v':
 870                         v_flag++;
 871                         break;
 872                 case 'w':
 873                         if (w_flag)
 874                                 usage();
 875                         test_func = test_rw;
 876                         w_flag = 1;
 877                         break;
 878                 case 'n':
 879                         if (w_flag)
 880                                 usage();
 881                         test_func = test_nd;
 882                         w_flag = 2;
 883                         break;
 884                 case 'c':
 885                         blocks_at_once = strtoul (optarg, &tmp, 0);
 886                         if (*tmp) {
 887                                 com_err (program_name, 0,
 888                                          "bad simultaneous block count - %s", optarg);
 889                                 exit (1);
 890                         }
 891                         break;
 892                 case 'p':
 893                         num_passes = strtoul (optarg, &tmp, 0);
 894                         if (*tmp) {
 895                                 com_err (program_name, 0,
 896                                     "bad number of clean passes - %s", optarg);
 897                                 exit (1);
 898                         }
 899                         break;
 900                 case 'h':
 901                         host_device_name = optarg;
 902                         break;
 903                 case 't':
 904                         if (t_flag + 1 > t_max) {
 905                                 unsigned long *t_patts_new;
 906
 907                                 t_patts_new = realloc(t_patts, t_max + T_INC);
 908                                 if (!t_patts_new) {
 909                                         com_err(program_name, ENOMEM,
 910                                                 _("can't allocate memory for "
 911                                                   "test_pattern - %s"),
 912                                                 optarg);
 913                                         exit(1);
 914                                 }
 915                                 t_patts = t_patts_new;
 916                                 t_max += T_INC;
 917                         }
 918                         if (!strcmp(optarg, "r") || !strcmp(optarg,"random")) {
 919                                 t_patts[t_flag++] = ~0;
 920                         } else {
 921                                 pattern = strtoul(optarg, &tmp, 0);
 922                                 if (*tmp) {
 923                                         com_err(program_name, 0,
 924                                         _("invalid test_pattern: %s\n"),
 925                                                 optarg);
 926                                         exit(1);
 927                                 }
 928                                 if (pattern == ~0)
 929                                         pattern = 0xffff;
 930                                 t_patts[t_flag++] = pattern;
 931                         }
 932                         break;
 933                 default:
 934                         usage();
 935                 }
 936         }
 937         if (!w_flag) {
 938                 if (t_flag > 1) {
 939                         com_err(program_name, 0,
 940                         _("Maximum of one test_pattern may be specified "
 941                           "in read-only mode"));
 942                         exit(1);
 943                 }
 944                 if (t_patts && (t_patts[0] == ~0)) {
 945                         com_err(program_name, 0,
 946                         _("Random test_pattern is not allowed "
 947                           "in read-only mode"));
 948                         exit(1);
 949                 }
 950         }
 951         if (optind > argc - 1)
 952                 usage();
 953         device_name = argv[optind++];
 954         if (optind > argc - 1) {
 955                 errcode = ext2fs_get_device_size(device_name,
 956                                                  block_size,
 957                                                  &last_block);
 958                 if (errcode == EXT2_ET_UNIMPLEMENTED) {
 959                         com_err(program_name, 0,
 960                                 _("Couldn't determine device size; you "
 961                                   "must specify\nthe size manually\n"));
 962                         exit(1);
 963                 }
 964                 if (errcode) {
 965                         com_err(program_name, errcode,
 966                                 _("while trying to determine device size"));
 967                         exit(1);
 968                 }
 969         } else {
 970                 last_block = strtoul (argv[optind], &tmp, 0);
 971                 if (*tmp) {
 972                         com_err (program_name, 0, _("bad blocks count - %s"),
 973                                  argv[optind]);
 974                         exit (1);
 975                 }
 976                 optind++;
 977         }
 978         if (optind <= argc-1) {
 979                 from_count = strtoul (argv[optind], &tmp, 0);
 980                 if (*tmp) {
 981                         com_err (program_name, 0, _("bad starting block - %s"),
 982                                  argv[optind]);
 983                         exit (1);
 984                 }
 985         } else from_count = 0;
 986         if (from_count >= last_block) {
 987             com_err (program_name, 0, _("bad blocks range: %lu-%lu"),
 988                      from_count, last_block);
 989             exit (1);
 990         }
 991         if (w_flag)
 992                 check_mount(device_name);
 993
 994         open_flag = w_flag ? O_RDWR : O_RDONLY;
 995         dev = open (device_name, open_flag);
 996         if (dev == -1) {
 997                 com_err (program_name, errno, _("while trying to open %s"),
 998                          device_name);
 999                 exit (1);
1000         }
1001         if (host_device_name) {
1002                 host_dev = open (host_device_name, open_flag);
1003                 if (host_dev == -1) {
1004                         com_err (program_name, errno,
1005                                  _("while trying to open %s"),
1006                                  host_device_name);
1007                         exit (1);
1008                 }
1009         } else
1010                 host_dev = dev;
1011         if (input_file) {
1012                 if (strcmp (input_file, "-") == 0)
1013                         in = stdin;
1014                 else {
1015                         in = fopen (input_file, "r");
1016                         if (in == NULL)
1017                         {
1018                                 com_err (program_name, errno,
1019                                          _("while trying to open %s"),
1020                                          input_file);
1021                                 exit (1);
1022                         }
1023                 }
1024         }
1025         if (output_file && strcmp (output_file, "-") != 0)
1026         {
1027                 out = fopen (output_file, "w");
1028                 if (out == NULL)
1029                 {
1030                         com_err (program_name, errno,
1031                                  _("while trying to open %s"),
1032                                  output_file);
1033                         exit (1);
1034                 }
1035         }
1036         else
1037                 out = stdout;
1038
1039         errcode = ext2fs_badblocks_list_create(&bb_list,0);
1040         if (errcode) {
1041                 com_err (program_name, errcode,
1042                          _("creating in-memory bad blocks list"));
1043                 exit (1);
1044         }
1045
1046         if (in) {
1047                 for(;;) {
1048                         switch(fscanf (in, "%u\n", &next_bad)) {
1049                                 case 0:
1050                                         com_err (program_name, 0, "input file - bad format");
1051                                         exit (1);
1052                                 case EOF:
1053                                         break;
1054                                 default:
1055                                         errcode = ext2fs_badblocks_list_add(bb_list,next_bad);
1056                                         if (errcode) {
1057                                                 com_err (program_name, errcode, _("adding to in-memory bad block list"));
1058                                                 exit (1);
1059                                         }
1060                                         continue;
1061                         }
1062                         break;
1063                 }
1064
1065                 if (in != stdin)
1066                         fclose (in);
1067         }
1068
1069         do {
1070                 unsigned int bb_count;
1071
1072                 bb_count = test_func(dev, last_block, block_size,
1073                                      from_count, blocks_at_once);
1074                 if (bb_count)
1075                         passes_clean = 0;
1076                 else
1077                         ++passes_clean;
1078
1079                 if (v_flag)
1080                         fprintf(stderr,
1081                                 _("Pass completed, %u bad blocks found.\n"),
1082                                 bb_count);
1083
1084         } while (passes_clean < num_passes);
1085
1086         close (dev);
1087         if (out != stdout)
1088                 fclose (out);
1089         if (t_patts)
1090                 free(t_patts);
1091         return 0;
1092 }
1093