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

NAME         top

       xfs_logprint - print the log of an XFS filesystem

SYNOPSIS         top

       xfs_logprint [ options ] device

DESCRIPTION         top

       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         top

       -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

       -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         top

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

COLOPHON         top

       This page is part of the xfsprogs (utilities for XFS filesystems)
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