Exemple #1
0
void
buf_flush_init_for_writing(
/*=======================*/
	byte*	page,		/* in: page */
	dulint	newest_lsn,	/* in: newest modification lsn to the page */
	ulint	space,		/* in: space id */
	ulint	page_no)	/* in: page number */
{
	/* Write the newest modification lsn to the page header and trailer */
	mach_write_to_8(page + FIL_PAGE_LSN, newest_lsn);

	mach_write_to_8(page + UNIV_PAGE_SIZE - FIL_PAGE_END_LSN_OLD_CHKSUM,
			newest_lsn);
	/* Write the page number and the space id */

	mach_write_to_4(page + FIL_PAGE_OFFSET, page_no);
	mach_write_to_4(page + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID, space);

	/* Store the new formula checksum */

	mach_write_to_4(page + FIL_PAGE_SPACE_OR_CHKSUM,
			srv_use_checksums
			? buf_calc_page_new_checksum(page)
			: BUF_NO_CHECKSUM_MAGIC);

	/* We overwrite the first 4 bytes of the end lsn field to store
	the old formula checksum. Since it depends also on the field
	FIL_PAGE_SPACE_OR_CHKSUM, it has to be calculated after storing the
	new formula checksum. */

	mach_write_to_4(page + UNIV_PAGE_SIZE - FIL_PAGE_END_LSN_OLD_CHKSUM,
			srv_use_checksums
			? buf_calc_page_old_checksum(page)
			: BUF_NO_CHECKSUM_MAGIC);
}
Exemple #2
0
int main(int argc, char **argv)
{
  FILE *f;                     /* our input file */
  uchar *p;                     /* storage of pages read */
  int bytes;                   /* bytes read count */
  ulint ct;                    /* current page number (0 based) */
  int now;                     /* current time */
  int lastt;                   /* last time */
  ulint oldcsum, oldcsumfield, csum, csumfield, logseq, logseqfield; /* ulints for checksum storage */
  struct stat st;              /* for stat, if you couldn't guess */
  unsigned long long int size; /* size of file (has to be 64 bits) */
  ulint pages;                 /* number of pages in file */
  ulint start_page= 0, end_page= 0, use_end_page= 0; /* for starting and ending at certain pages */
  off_t offset= 0;
  int just_count= 0;          /* if true, just print page count */
  int verbose= 0;
  int debug= 0;
  int c;
  int fd;

  /* remove arguments */
  while ((c= getopt(argc, argv, "cvds:e:p:")) != -1)
  {
    switch (c)
    {
    case 'v':
      verbose= 1;
      break;
    case 'c':
      just_count= 1;
      break;
    case 's':
      start_page= atoi(optarg);
      break;
    case 'e':
      end_page= atoi(optarg);
      use_end_page= 1;
      break;
    case 'p':
      start_page= atoi(optarg);
      end_page= atoi(optarg);
      use_end_page= 1;
      break;
    case 'd':
      debug= 1;
      break;
    case ':':
      fprintf(stderr, "option -%c requires an argument\n", optopt);
      return 1;
      break;
    case '?':
      fprintf(stderr, "unrecognized option: -%c\n", optopt);
      return 1;
      break;
    }
  }

  /* debug implies verbose... */
  if (debug) verbose= 1;

  /* make sure we have the right arguments */
  if (optind >= argc)
  {
    printf("InnoDB offline file checksum utility.\n");
    printf("usage: %s [-c] [-s <start page>] [-e <end page>] [-p <page>] [-v] [-d] <filename>\n", argv[0]);
    printf("\t-c\tprint the count of pages in the file\n");
    printf("\t-s n\tstart on this page number (0 based)\n");
    printf("\t-e n\tend at this page number (0 based)\n");
    printf("\t-p n\tcheck only this page (0 based)\n");
    printf("\t-v\tverbose (prints progress every 5 seconds)\n");
    printf("\t-d\tdebug mode (prints checksums for each page)\n");
    return 1;
  }

  /* stat the file to get size and page count */
  if (stat(argv[optind], &st))
  {
    perror("error statting file");
    return 1;
  }
  size= st.st_size;
  pages= size / UNIV_PAGE_SIZE;
  if (just_count)
  {
    printf("%lu\n", pages);
    return 0;
  }
  else if (verbose)
  {
    printf("file %s = %llu bytes (%lu pages)...\n", argv[optind], size, pages);
    printf("checking pages in range %lu to %lu\n", start_page, use_end_page ? end_page : (pages - 1));
  }

  /* open the file for reading */
  f= fopen(argv[optind], "r");
  if (!f)
  {
    perror("error opening file");
    return 1;
  }

  /* seek to the necessary position */
  if (start_page)
  {
    fd= fileno(f);
    if (!fd)
    {
      perror("unable to obtain file descriptor number");
      return 1;
    }

    offset= (off_t)start_page * (off_t)UNIV_PAGE_SIZE;

    if (lseek(fd, offset, SEEK_SET) != offset)
    {
      perror("unable to seek to necessary offset");
      return 1;
    }
  }

  /* allocate buffer for reading (so we don't realloc every time) */
  p= (uchar *)malloc(UNIV_PAGE_SIZE);

  /* main checksumming loop */
  ct= start_page;
  lastt= 0;
  while (!feof(f))
  {
    bytes= fread(p, 1, UNIV_PAGE_SIZE, f);
    if (!bytes && feof(f)) return 0;
    if (bytes != UNIV_PAGE_SIZE)
    {
      fprintf(stderr, "bytes read (%d) doesn't match universal page size (%d)\n", bytes, UNIV_PAGE_SIZE);
      return 1;
    }

    /* check the "stored log sequence numbers" */
    logseq= mach_read_from_4(p + FIL_PAGE_LSN + 4);
    logseqfield= mach_read_from_4(p + UNIV_PAGE_SIZE - FIL_PAGE_END_LSN_OLD_CHKSUM + 4);
    if (debug)
      printf("page %lu: log sequence number: first = %lu; second = %lu\n", ct, logseq, logseqfield);
    if (logseq != logseqfield)
    {
      fprintf(stderr, "page %lu invalid (fails log sequence number check)\n", ct);
      return 1;
    }

    /* check old method of checksumming */
    oldcsum= buf_calc_page_old_checksum(p);
    oldcsumfield= mach_read_from_4(p + UNIV_PAGE_SIZE - FIL_PAGE_END_LSN_OLD_CHKSUM);
    if (debug)
      printf("page %lu: old style: calculated = %lu; recorded = %lu\n", ct, oldcsum, oldcsumfield);
    if (oldcsumfield != mach_read_from_4(p + FIL_PAGE_LSN) && oldcsumfield != oldcsum)
    {
      fprintf(stderr, "page %lu invalid (fails old style checksum)\n", ct);
      return 1;
    }

    /* now check the new method */
    csum= buf_calc_page_new_checksum(p);
    csumfield= mach_read_from_4(p + FIL_PAGE_SPACE_OR_CHKSUM);
    if (debug)
      printf("page %lu: new style: calculated = %lu; recorded = %lu\n", ct, csum, csumfield);
    if (csumfield != 0 && csum != csumfield)
    {
      fprintf(stderr, "page %lu invalid (fails new style checksum)\n", ct);
      return 1;
    }

    /* end if this was the last page we were supposed to check */
    if (use_end_page && (ct >= end_page))
      return 0;

    /* do counter increase and progress printing */
    ct++;
    if (verbose)
    {
      if (ct % 64 == 0)
      {
        now= time(0);
        if (!lastt) lastt= now;
        if (now - lastt >= 1)
        {
          printf("page %lu okay: %.3f%% done\n", (ct - 1), (float) ct / pages * 100);
          lastt= now;
        }
      }
    }
  }
  return 0;
}