libxlog/util.c

   1 /*
   2  * Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include <libxlog.h>
  34
  35 int print_exit;
  36 int print_record_header;
  37 libxfs_init_t x;
  38
  39 static int
  40 header_check_uuid(xfs_mount_t *mp, xlog_rec_header_t *head)
  41 {
  42     char uu_log[64], uu_sb[64];
  43
  44     if (!uuid_compare(mp->m_sb.sb_uuid, head->h_fs_uuid)) return 0;
  45
  46     uuid_unparse(mp->m_sb.sb_uuid, uu_sb);
  47     uuid_unparse(head->h_fs_uuid, uu_log);
  48
  49     printf(_("* ERROR: mismatched uuid in log\n"
  50              "*            SB : %s\n*            log: %s\n"),
  51             uu_sb, uu_log);
  52
  53     memcpy(&mp->m_sb.sb_uuid, head->h_fs_uuid, sizeof(uuid_t));
  54
  55     return 0;
  56 }
  57
  58 int
  59 xlog_header_check_recover(xfs_mount_t *mp, xlog_rec_header_t *head)
  60 {
  61     if (print_record_header)
  62         printf(_("\nLOG REC AT LSN cycle %d block %d (0x%x, 0x%x)\n"),
  63                CYCLE_LSN(head->h_lsn, ARCH_CONVERT),
  64                BLOCK_LSN(head->h_lsn, ARCH_CONVERT),
  65                CYCLE_LSN(head->h_lsn, ARCH_CONVERT),
  66                BLOCK_LSN(head->h_lsn, ARCH_CONVERT));
  67
  68     if (INT_GET(head->h_magicno, ARCH_CONVERT) != XLOG_HEADER_MAGIC_NUM) {
  69
  70         printf(_("* ERROR: bad magic number in log header: 0x%x\n"),
  71                 INT_GET(head->h_magicno, ARCH_CONVERT));
  72
  73     } else if (header_check_uuid(mp, head)) {
  74
  75         /* failed - fall through */
  76
  77     } else if (INT_GET(head->h_fmt, ARCH_CONVERT) != XLOG_FMT) {
  78
  79         printf(_("* ERROR: log format incompatible (log=%d, ours=%d)\n"),
  80                 INT_GET(head->h_fmt, ARCH_CONVERT), XLOG_FMT);
  81
  82     } else {
  83         /* everything is ok */
  84         return 0;
  85     }
  86
  87     /* bail out now or just carry on regardless */
  88     if (print_exit)
  89         xlog_exit(_("Bad log"));
  90
  91     return 0;
  92 }
  93
  94 int
  95 xlog_header_check_mount(xfs_mount_t *mp, xlog_rec_header_t *head)
  96 {
  97     if (uuid_is_null(head->h_fs_uuid)) return 0;
  98     if (header_check_uuid(mp, head)) {
  99         /* bail out now or just carry on regardless */
 100         if (print_exit)
 101             xlog_exit(_("Bad log"));
 102     }
 103     return 0;
 104 }