NAME

       vfs_ceph_snapshots - Expose CephFS snapshots as shadow-copies

SYNOPSIS

       vfs objects = ceph_snapshots

DESCRIPTION

       This VFS module is part of the samba(8) suite.

       The vfs_ceph_snapshots VFS module exposes CephFS snapshots for use by Samba. When enabled,
       SMB clients such as Windows Explorer's Previous Versions dialog, can enumerate snapshots
       and access them via "timewarp" tokens.

       This module can be combined with vfs_ceph, but vfs_ceph_snapshots must be listed first in
       the vfs objects parameter list.

       CephFS support for ceph.snap.btime virtual extended attributes is required for this module
       to work properly. This support was added via https://tracker.ceph.com/issues/38838.

CONFIGURATION

       When used atop vfs_ceph, path refers to an absolute path within the Ceph filesystem and
       should not be mounted locally:

                     [share]
                     vfs objects = ceph_snapshots ceph
                     path = /non-mounted/cephfs/path
                     kernel share modes = no

       vfs_ceph_snapshots can also be used atop a kernel CephFS mounted share path, without
       vfs_ceph. In this case Samba's default VFS backend vfs_default is used:

                     [share]
                     vfs objects = ceph_snapshots
                     path = /mnt/cephfs/

OPTIONS

       ceph:snapdir = subdirectory
           Allows for the configuration of the special CephFS snapshot subdirectory name. This
           parameter should only be changed from the ".snap" default if the ceph.conf client
           snapdir or snapdirname mount option settings are changed from their matching ".snap"
           defaults.

           Default: ceph:snapdir = .snap

           Example: ceph:snapdir = .snapshots

VERSION

       This man page is part of version 4.15.13-Ubuntu of the Samba suite.

AUTHOR

       The original Samba software and related utilities were created by Andrew Tridgell. Samba
       is now developed by the Samba Team as an Open Source project similar to the way the Linux
       kernel is developed.