Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/Documentation/filesystems/gfs2.rst b/Documentation/filesystems/gfs2.rst
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+.. SPDX-License-Identifier: GPL-2.0
+
+====================
+Global File System 2
+====================
+
+GFS2 is a cluster file system. It allows a cluster of computers to
+simultaneously use a block device that is shared between them (with FC,
+iSCSI, NBD, etc).  GFS2 reads and writes to the block device like a local
+file system, but also uses a lock module to allow the computers coordinate
+their I/O so file system consistency is maintained.  One of the nifty
+features of GFS2 is perfect consistency -- changes made to the file system
+on one machine show up immediately on all other machines in the cluster.
+
+GFS2 uses interchangeable inter-node locking mechanisms, the currently
+supported mechanisms are:
+
+  lock_nolock
+    - allows GFS2 to be used as a local file system
+
+  lock_dlm
+    - uses the distributed lock manager (dlm) for inter-node locking.
+      The dlm is found at linux/fs/dlm/
+
+lock_dlm depends on user space cluster management systems found
+at the URL above.
+
+To use GFS2 as a local file system, no external clustering systems are
+needed, simply::
+
+  $ mkfs -t gfs2 -p lock_nolock -j 1 /dev/block_device
+  $ mount -t gfs2 /dev/block_device /dir
+
+The gfs2-utils package is required on all cluster nodes and, for lock_dlm, you
+will also need the dlm and corosync user space utilities configured as per the
+documentation.
+
+gfs2-utils can be found at https://pagure.io/gfs2-utils
+
+GFS2 is not on-disk compatible with previous versions of GFS, but it
+is pretty close.
+
+The following man pages are available from gfs2-utils:
+
+  ============		=============================================
+  fsck.gfs2		to repair a filesystem
+  gfs2_grow		to expand a filesystem online
+  gfs2_jadd		to add journals to a filesystem online
+  tunegfs2		to manipulate, examine and tune a filesystem
+  gfs2_convert		to convert a gfs filesystem to GFS2 in-place
+  mkfs.gfs2		to make a filesystem
+  ============		=============================================