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xfs_logprint(8)             System Manager's Manual            xfs_logprint(8)

       xfs_logprint - print the log of an XFS filesystem

       xfs_logprint [ options ] device-name
       xfs_logprint -f [ options ] filename

       xfs_logprint  prints  the  log  of an XFS filesystem (see xfs(5)).  The
       device-name argument is the pathname of the partition or logical volume
       containing  the  filesystem.   The  contents  of  the filesystem remain
       undisturbed.  There are two major modes of operation in xfs_logprint.

       One mode is better for filesystem operation debugging.   It  is  called
       the  transactional  view  and  is  enabled  through the -t option.  The
       transactional view prints only the portion of the log that pertains  to
       recovery.   In other words, it prints out complete transactions between
       the tail and the head.  This view tries  to  display  each  transaction
       without regard to how they are split across log records.

       The  second  mode starts printing out information from the beginning of
       the log.  Some error blocks might print out in  the  beginning  because
       the  last log record usually overlaps the oldest log record.  A message
       is printed when the physical end of the log is  reached  and  when  the
       logical  end of the log is reached.  A log record view is displayed one
       record at a time.  Transactions  that  span  log  records  may  not  be
       decoded fully.

       Common options are:

       -b     Extract  and  print  buffer  information.  Only used in transac-
              tional view.

       -C filename
              Copy the log from the filesystem to the file filename.  The  log
              itself is not printed.

       -d     Dump  the  log from front to end, printing where each log record
              is located on disk.

       -D     Do not decode anything; just print data.

       -e     Exit when an error is found in the log.  Normally,  xfs_logprint
              tries  to continue and unwind from bad logs.  However, sometimes
              it just dies in bad  ways.   Using  this  option  prevents  core

       -f     The log is a file.

       -l     External  log  device.   Only for those filesystems which use an
              external log.

       -i     Extract and print inode information.  Only used in transactional

       -q     Extract and print quota information.  Only used in transactional

       -n     Do not try and interpret log data;  just  interpret  log  header

       -o     Also  print  buffer  data in hex.  Normally, buffer data is just
              decoded, so better information can be printed.

       -s start-block
              Override any notion of where to start printing.

       -t     Print out the transactional view.

       mkfs.xfs(8), mount(8).