NAME

       vfs_btrfs - Utilize features provided by the Btrfs filesystem

SYNOPSIS

       vfs objects = btrfs

DESCRIPTION

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

       The vfs_btrfs VFS module exposes Btrfs specific features for use by Samba.

       Btrfs allows for multiple files to share the same on-disk data through the use cloned
       ranges. When an SMB client issues a request to copy duplicate data (via
       FSCTL_SRV_COPYCHUNK), this module maps the request to a Btrfs clone range IOCTL, instead
       of performing reads and writes required by a traditional copy. Doing so saves storage
       capacity and greatly reduces disk IO.

       This module also exposes Btrfs per-file compression support to SMB clients via the get/set
       compression fsctls.

       Btrfs snapshots can be manipulated by Samba's FSRVP server. Snapshot manipulation using
       this module is currently considered experimental, and is therefore disabled by default.
       The vfs_snapper module is instead recommended for this purpose.

       This module is stackable.

OPTIONS

       btrfs: manipulate snapshots = [yes|no]
           When set to yes, experimental support for the creation and deletion of snapshots via
           corresponding Btrfs IOCTLs will be enabled. The default is no, which means that such
           requests are passed through to any underlying VFS module.

CONFIGURATION

       vfs_btrfs requires that the underlying share path is a Btrfs subvolume.

                     [share]
                     vfs objects = btrfs
                     btrfs: manipulate snapshots = no

       To use the experimental snapshot manipulation functionality provided by this module, it
       must be explicitly enabled, and Samba's FSRVP server must be running.

       The vfs_shadow_copy module can be used to expose snapshots created by vfs_btrfs to Windows
       Explorer as file / directory "previous versions".

                     [global]
                     rpc_daemon:fssd = fork
                     registry shares = yes
                     include = registry

                     [share]
                     vfs objects = btrfs shadow_copy
                     btrfs: manipulate snapshots = yes

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.