1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 config GFS2_FS 2 config GFS2_FS
3 tristate "GFS2 file system support" 3 tristate "GFS2 file system support"
4 select BUFFER_HEAD <<
5 select FS_POSIX_ACL 4 select FS_POSIX_ACL
6 select CRC32 5 select CRC32
7 select LIBCRC32C 6 select LIBCRC32C
8 select QUOTACTL 7 select QUOTACTL
9 select FS_IOMAP 8 select FS_IOMAP
10 help 9 help
11 A cluster filesystem. 10 A cluster filesystem.
12 11
13 Allows a cluster of computers to sim 12 Allows a cluster of computers to simultaneously use a block device
14 that is shared between them (with FC 13 that is shared between them (with FC, iSCSI, NBD, etc...). GFS reads
15 and writes to the block device like 14 and writes to the block device like a local filesystem, but also uses
16 a lock module to allow the computers 15 a lock module to allow the computers coordinate their I/O so
17 filesystem consistency is maintained 16 filesystem consistency is maintained. One of the nifty features of
18 GFS is perfect consistency -- change 17 GFS is perfect consistency -- changes made to the filesystem on one
19 machine show up immediately on all o 18 machine show up immediately on all other machines in the cluster.
20 19
21 To use the GFS2 filesystem in a clus 20 To use the GFS2 filesystem in a cluster, you will need to enable
22 the locking module below. Documentat 21 the locking module below. Documentation and utilities for GFS2 can
23 be found here: http://sources.redhat 22 be found here: http://sources.redhat.com/cluster
24 23
25 The "nolock" lock module is now buil 24 The "nolock" lock module is now built in to GFS2 by default. If
26 you want to use the DLM, be sure to 25 you want to use the DLM, be sure to enable IPv4/6 networking.
27 26
28 config GFS2_FS_LOCKING_DLM 27 config GFS2_FS_LOCKING_DLM
29 bool "GFS2 DLM locking" 28 bool "GFS2 DLM locking"
30 depends on (GFS2_FS!=n) && NET && INET 29 depends on (GFS2_FS!=n) && NET && INET && (IPV6 || IPV6=n) && \
31 CONFIGFS_FS && SYSFS && (DLM=y 30 CONFIGFS_FS && SYSFS && (DLM=y || DLM=GFS2_FS)
32 help 31 help
33 Multiple node locking module for GFS 32 Multiple node locking module for GFS2
34 33
35 Most users of GFS2 will require this 34 Most users of GFS2 will require this. It provides the locking
36 interface between GFS2 and the DLM, 35 interface between GFS2 and the DLM, which is required to use GFS2
37 in a cluster environment. 36 in a cluster environment.
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.