1config GFS2_FS
2	tristate "GFS2 file system support"
3	depends on (64BIT || LBDAF)
4	select FS_POSIX_ACL
5	select CRC32
6	select QUOTACTL
7	help
8	  A cluster filesystem.
9
10	  Allows a cluster of computers to simultaneously use a block device
11	  that is shared between them (with FC, iSCSI, NBD, etc...).  GFS reads
12	  and writes to the block device like a local filesystem, but also uses
13	  a lock module to allow the computers coordinate their I/O so
14	  filesystem consistency is maintained.  One of the nifty features of
15	  GFS is perfect consistency -- changes made to the filesystem on one
16	  machine show up immediately on all other machines in the cluster.
17
18	  To use the GFS2 filesystem in a cluster, you will need to enable
19	  the locking module below. Documentation and utilities for GFS2 can
20	  be found here: http://sources.redhat.com/cluster
21
22	  The "nolock" lock module is now built in to GFS2 by default. If
23	  you want to use the DLM, be sure to enable IPv4/6 networking.
24
25config GFS2_FS_LOCKING_DLM
26	bool "GFS2 DLM locking"
27	depends on (GFS2_FS!=n) && NET && INET && (IPV6 || IPV6=n) && \
28		CONFIGFS_FS && SYSFS && (DLM=y || DLM=GFS2_FS)
29	help
30	  Multiple node locking module for GFS2
31
32	  Most users of GFS2 will require this. It provides the locking
33	  interface between GFS2 and the DLM, which is required to use GFS2
34	  in a cluster environment.
35