xfs_logprint - print the log of an XFS filesystem
prints the log of an XFS filesystem (see xfs
argument is the pathname of the partition or logical volume
containing the filesystem. The device
can be a regular file if the
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
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.
- Extract and print buffer information. Only used in
- 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.
- Dump the log from front to end, printing where each log
record is located on disk.
- Do not decode anything; just print data.
- 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
- 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
- -l logdev
- External log device. Only for those filesystems which use
an external log.
- Extract and print inode information. Only used in
- Extract and print quota information. Only used in
- Do not try and interpret log data; just interpret log
- 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.
- Print out the transactional view.
- Print "overwrite" data.
- Prints the version number and exits.