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config GFS2_FS
tristate "GFS2 file system support"
depends on (64BIT || LBDAF)
select FS_POSIX_ACL
select CRC32
select QUOTACTL
help
A cluster filesystem.
Allows a cluster of computers to simultaneously use a block device
that is shared between them (with FC, iSCSI, NBD, etc...). GFS reads
and writes to the block device like a local filesystem, but also uses
a lock module to allow the computers coordinate their I/O so
filesystem consistency is maintained. One of the nifty features of
GFS is perfect consistency -- changes made to the filesystem on one
machine show up immediately on all other machines in the cluster.
To use the GFS2 filesystem in a cluster, you will need to enable
the locking module below. Documentation and utilities for GFS2 can
be found here: http://sources.redhat.com/cluster
The "nolock" lock module is now built in to GFS2 by default. If
you want to use the DLM, be sure to enable HOTPLUG and IPv4/6
networking.
config GFS2_FS_LOCKING_DLM
bool "GFS2 DLM locking"
depends on (GFS2_FS!=n) && NET && INET && (IPV6 || IPV6=n) && \
HOTPLUG && CONFIGFS_FS && SYSFS && (DLM=y || DLM=GFS2_FS)
help
Multiple node locking module for GFS2
Most users of GFS2 will require this. It provides the locking
interface between GFS2 and the DLM, which is required to use GFS2
in a cluster environment.
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