xfs_logprint(8)                                                                                                  xfs_logprint(8)



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.  How-
              ever, 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.

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



                                                                                                                 xfs_logprint(8)