NAME

       xfs_logprint - print the log of an XFS filesystem

SYNOPSIS

       xfs_logprint [ options ] device

DESCRIPTION

       xfs_logprint  prints  the  log of an XFS filesystem (see xfs(5)).  The device argument is the pathname of
       the partition or logical volume containing the filesystem. The device can be a regular  file  if  the  -f
       option  is  used.  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.

OPTIONS

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

       -c     Attempt to continue when an error is detected.

       -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 dumps.

       -f     Specifies that the filesystem image to be processed is stored in a regular file at device (see the
              mkfs.xfs(8)  -d  file  option).   This might happen if an image copy of a filesystem has been made
              into an ordinary file with xfs_copy(8).

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

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

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

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

       -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.

       -v     Print "overwrite" data.

       -V     Prints the version number and exits.

SEE ALSO

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

                                                                                                 xfs_logprint(8)