debugfs.ocfs2 - OCFS2 file system debugger.

       This tool has been modelled after debugfs, a debugging tool for ext2.

       Oracle Corporation

       This is a list of the commands which debugfs.ocfs2 supports.

       bmapfilespeclogical_block
              Display  the  physical block number corresponding to the logical block number logical_block in the
              inode filespec.

       catfilespec
              Dump the contents of inode filespec to stdout.

       cdfilespec
              Change the current working directory to filespec.

       chrootfilespec
              Change the root directory to be the directory filespec.

       close  Close the currently opened filesystem.

       controlddump
              Display information obtained from ocfs2_controld.

       curdev Show the currently open device.

       decode<lockname>
              Display the inode number encoded in the lockname.

       dirblocks<filespec>
              Display the directory blocks associated with the given filespec.

       dlm_locks[-f<file>][-l][<lockname(s)>]...
              Display the status of all lock resources in the o2dlm domain that the file system is a member  of.
              This  command  expects  the  debugfs  filesystem  to  be  mounted  as  mount-tdebugfsdebugfs/sys/kernel/debug. Use lockname(s) to limit the output to the given lock resources, -l to  include
              contents   of   the   lock   value   block   and   -f<file>   to   specify   a  saved  copy  of
              /sys/kernel/debug/o2dlm/<DOMAIN>/locking_state.

       dump[-p]filespecoutfile
              Dump the contents of the inode filespec to the output file outfile. If the -p is  given,  set  the
              owner, group, timestamps and permissions information on outfile to match those of filespec.

       dx_dumpfilespec
              Display the indexed directory information for the given directory.

       dx_leaf<block#>
              Display the contents of the given indexed directory leaf block.

       dx_root<block#>
              Display the contents of the given indexed directory root block.

       dx_spacefilespec
              Display the directory free space list.

       encodefilespec
              Display the lockname for the filespec.

       extent<block#>
              Display the contents of the extent structure at block#.

       findpath[<lockname>|<inode#>]
              Display  the pathname for the inode specified by lockname or inode#. This command does not display
              all the hard-linked paths for the inode.

       fragfilespec
              Display the inode's number of extents to clusters ratio.

       fs_locks[-f<file>][-l][-B][<lockname(s)>]...
              Display the status of all locks known by  the  file  system.  This  command  expects  the  debugfs
              filesystem  to be mounted as mount-tdebugfsdebugfs/sys/kernel/debug.  Use lockname(s) to limit
              the output to the given lock resources, -B to limit the output to  only  the  busy  locks,  -l  to
              include   contents   of  the  lock  value  block  and  -f<file>  to  specify  a  saved  copy  of
              /sys/kernel/debug/ocfs2/<UUID>/locking_state.

       group<block#>
              Display the contents of the group descriptor at block#.

       grpextents<block#>
              Display free extents in the chain group.

       hb     Display the contents of the heartbeat system file.

       help,?
              Print the list of commands understood by debugfs.ocfs2.

       icheckblock#...
              Display the inodes that use the one or more blocks specified on the command line.  If the inode is
              a regular file, also display the corresponding logical block offset.

       lcddirectory
              Change the current working directory of the debugfs.ocfs2 process to the directory on  the  native
              filesystem.

       locate[<lockname>|<inode#>]...
              Display all pathnames for the inode(s) specified by locknames or inode#s.

       logdump[-T]slot#
              Display the contents of the journal for slot slot#. Use -T to limit the output to just the summary
              of the inodes in the journal.

       ls[-l]filespec
              Print the listing  of the files in the directory filespec. The -l flag will list files in the long
              format.

       net_stats[-f<file>][interval[count]]
              Display  the  net  statistics.  This  command  expects  the  debugfs  filesystem  to be mounted at
              /sys/kernel/debug. The interval is in seconds. Use the -f parameter to specify  a  saved  copy  of
              /sys/kernel/debug/o2net/stats.

       ncheck[<lockname>|<inode#>]...
              See locate.

       opendevice
              Open the filesystem on device.

       quit,q
              Quit debugfs.ocfs2.

       rdump[-v]filespecoutdir
              Recursively  dump directory filespec and all its contents (including regular files, symbolic links
              and other directories) into the outdir which  should  be  an  existing  directory  on  the  native
              filesystem.

       refcount[-e]filespec
              Display the refcount block, and optionally its tree, of the specified inode.

       slotmap
              Display the contents of the slotmap system file.

       stat[-t|-T]filespec
              Display  the contents of the inode structure for the filespec.  The -t ("traverse") option selects
              traversal of the inode's metadata.  The extent tree, chain list, or other extra metadata  will  be
              dumped.   This  is the default.  The -T option turns off traversal to reduce the I/O required when
              basic inode information is needed.

       stat_sysdir
              Display the contents of all objects in the system directory.

       stats[-h][-sbackup-number]
              Display the contents of the superblock. Use -s to display a specific backup superblock. Use -h  to
              hide the inode.

       xattr[-v]<filespec>
              Display extended attributes associated with the given filespec.

       Copyright © 2004, 2012 Oracle. All rights reserved.

Version 1.8.8                                     January 2012                                  debugfs.ocfs2(8)

       The  debugfs.ocfs2  program  is  an  interactive  file system debugger useful in displaying on-disk OCFS2
       filesystem structures on the specified device.

       Locknames are specially formatted strings used by the file system to uniquely  identify  objects  in  the
       filesystem.  Most  locknames used by OCFS2 are generated using the inode number and its generation number
       and can be decoded using the decode command or used directly in place of  an  inode  number  in  commands
       requiring  a  filespec.  Like  inode  numbers,  locknames  need  to  be enclosed in angle brackets, e.g.,
       <M000000000000000040c40c044069cf>. Use the encode command to  generate  all  possible  locknames  for  an
       object.

       debugfs.ocfs2 - OCFS2 file system debugger.

-d,--decodelockname
              Display the information encoded in the lockname.

       -e,--encodelock_typeblock_num[generation|parent]
              Display the lockname obtained by encoding the arguments provided.

       -f,--filecmdfile
              Executes the debugfs commands in cmdfile.

       -i,--image
              Specifies device is an o2image file created by o2image tool.

       -l [tracebit ... [allow|off|deny]] ...
              Control OCFS2 filesystem tracing by enabling and disabling trace bits.  Do debugfs.ocfs2-l to get
              the list of all trace bits.

       -n,--noprompt
              Hide prompt.

       -R,--requestcommand
              Executes a single debugfs command.

       -s,--superblockbackup-numbermkfs.ocfs2 makes up to 6 backup copies of the superblock at offsets 1G, 4G, 16G, 64G, 256G and  1T
              depending  on  the  size of the volume. Use this option to specify the backup, 1 thru 6, to use to
              open the volume.

       -w,--write
              Opens the filesystem in RW mode. By default the filesystem is opened in RO mode.

       -V,--version
              Display version and exit.

       -?,--help
              Displays help and exit.

fsck.ocfs2(8)fsck.ocfs2.checks(8)mkfs.ocfs2(8)mount.ocfs2(8)mounted.ocfs2(8)o2cluster(8)o2image(8)o2info(1)ocfs2(7)tunefs.ocfs2(8)

       Many debugfs.ocfs2 commands take a filespec as an argument to specify an inode (as opposed to a pathname)
       in the filesystem which is currently opened by debugfs.ocfs2. The filespec argument may be  specified  in
       two  forms.  The  first form is an inode number or lockname surrounded by angle brackets, e.g., <32>. The
       second form is a pathname; if the pathname is prefixed by a forward slash ('/'), then it  is  interpreted
       relative  to  the  root of the filesystem which is currently opened by debugfs.ocfs2. If not, the path is
       interpreted relative to the current working directory  as  maintained  by  debugfs.ocfs2,  which  can  be
       modified  using  the command cd. If the pathname is prefixed by a double forward slash ('//'), then it is
       interpreted relative to the root of the system directory of the filesystem opened by debugfs.ocfs2.

debugfs.ocfs2 [-fcmdfile] [-Rcommand] [-sbackup] [-nwV?] [device]

       debugfs.ocfs2-l [tracebit ... [allow|off|deny]] ...

       debugfs.ocfs2-d,--decodelocknamedebugfs.ocfs2-e,--encodelock_typeblock_num[generation|parent]