# xfs_logprint

## 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.
    


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