gfs2_tool(8)

NAME
gfs2_tool - interface to gfs2 ioctl/sysfs calls

SYNOPSIS
gfs2_tool COMMAND [OPTION]...

DESCRIPTION
gfs2_tool is an interface to a variety of the GFS2 ioctl/sysfs calls.

COMMANDS

clearflag Flag File1 File2 ...
    Clear an attribute flag on a file. See setflag for available flags.

df MountPoint
    Print out a space usage summary of a given filesystem. The information printed is more detailed than a standard "df".

freeze MountPoint
    Freeze (quiesce) a GFS2 cluster.

getargs MountPoint
    Get the GFS-specific mount arguments used to mount a filesystem.

gettune MountPoint
    Print out the current values of the tuning parameters in a running filesystem.

journals MountPoint
    Print out information about the journals in a mounted filesystem.

list
    List the currently mounted GFS2 filesystems. Each line represents a filesystem. The columns represent (in order): 1) An identifier that represents the mounted filesystem. 2) The name of the device that holds the filesystem (well, the name as the Linux kernel knows it).

lockdump MountPoint
    Print out information about the locks this machine holds for a given filesystem.

sb device proto [newvalue]
    View (and possibly replace) the name of the locking protocol in the file system superblock. The file system shouldn't be mounted by any client when you do this.

sb device table [newvalue]
    View (and possibly replace) the name of the locking table in the file system superblock. The file system shouldn't be mounted by any client when you do this.

sb device ondisk [newvalue]
    View (and possibly replace) the ondisk format number in the file system superblock. The file system shouldn't be mounted by any client when you do this. No one should have to use this.

sb device multihost [newvalue]
    View (and possibly replace) the multihost format number in the file system superblock. The file system shouldn't be mounted by any client when you do this. No one should have to use this.

sb device all
    Print out the superblock.

setflag Flag File1 File2 ...
    Set an attribute flag on a file. The currently supported flags are jdata, immutable, appendonly, noatime, and sync. In most cases, the chattr command may be used rather than gfs2_tool to set attributes. The jdata flag causes all the data written to a file to be journaled. If the jdata flag is set for a directory, all files and directories subsequently created within that directory are also journaled. This behavior replaces the old inherit_jdata flag from gfs. Same as chattr +j. The immutable flag marks the file immutable. The behavior is similar to the immutable flag in the ext2/3 filesystems. All write access is denied. Same as chattr +i. The appendonly flag causes all data to be written at the end of the file. Same as chattr +a. The noatime flag disables updates to the file's access time. Same as chattr +A. The sync flag causes data written to the file to be sync'ed to stable storage immediately. Same as chattr +S.

settune MountPoint parameter newvalue
    Set the value of tuning parameter. Use gettune for a listing of tunable parameters.

shrink MountPoint
    Causes any unused locks to be thrown out of memory.

unfreeze MountPoint
    Unfreeze a GFS2 cluster.

version
    Print out the version of GFS2 that this program goes with.

withdraw MountPoint
    Cause GFS2 to abnormally shutdown a given filesystem on this node.