logprint/log_dump.c

   1 /*
   2  * Copyright (c) 2004-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include "libxfs.h"
  19 #include "libxlog.h"
  20
  21 #include "logprint.h"
  22
  23 /*
  24  * Dump log blocks, not data
  25  */
  26
  27 void
  28 xfs_log_dump(
  29         struct xlog             *log,
  30         int                     fd,
  31         int                     print_block_start)
  32 {
  33         int                     r;
  34         uint                    last_cycle = -1;
  35         xfs_daddr_t             blkno, dupblkno;
  36         xlog_rec_header_t       *hdr;
  37         char                    buf[XLOG_HEADER_SIZE];
  38
  39         dupblkno = 0;
  40         hdr = (xlog_rec_header_t *)buf;
  41         xlog_print_lseek(log, fd, 0, SEEK_SET);
  42         for (blkno = 0; blkno < log->l_logBBsize; blkno++) {
  43                 r = read(fd, buf, sizeof(buf));
  44                 if (r < 0) {
  45                         fprintf(stderr, _("%s: read error (%lld): %s\n"),
  46                                 __FUNCTION__, (long long)blkno,
  47                                 strerror(errno));
  48                         continue;
  49                 } else if (r == 0) {
  50                         printf(_("%s: physical end of log at %lld\n"),
  51                                 __FUNCTION__, (long long)blkno);
  52                         break;
  53                 }
  54
  55                 if (CYCLE_LSN(be64_to_cpu(*(__be64 *)buf)) ==
  56                                 XLOG_HEADER_MAGIC_NUM && !print_no_data) {
  57                         printf(_(
  58                 "%6lld HEADER Cycle %d tail %d:%06d len %6d ops %d\n"),
  59                                 (long long)blkno,
  60                                 be32_to_cpu(hdr->h_cycle),
  61                                 CYCLE_LSN(be64_to_cpu(hdr->h_tail_lsn)),
  62                                 BLOCK_LSN(be64_to_cpu(hdr->h_tail_lsn)),
  63                                 be32_to_cpu(hdr->h_len),
  64                                 be32_to_cpu(hdr->h_num_logops));
  65                 }
  66
  67                 if (xlog_get_cycle(buf) != last_cycle) {
  68                         printf(_(
  69                 "[%05lld - %05lld] Cycle 0x%08x New Cycle 0x%08x\n"),
  70                                 (long long)dupblkno, (long long)blkno,
  71                                 last_cycle, xlog_get_cycle(buf));
  72                         last_cycle = xlog_get_cycle(buf);
  73                         dupblkno = blkno;
  74                 }
  75         }
  76 }