gfs2_tool(8)gfs2_tool(8)NAMEgfs2_tool - interface to gfs2 ioctl/sysfs calls
SYNOPSISgfs2_tool COMMAND [OPTION]...
DESCRIPTIONgfs2_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 run‐
ning filesystem.
journals MountPoint
Print out information about the journals in a mounted filesys‐
tem.
list List the currently mounted GFS2 filesystems. Each line repre‐
sents 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 jour‐
naled. 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.
gfs2_tool(8)
