NAME

       vfs_fileid - Generates file_id structs with unique device id values for cluster setups

SYNOPSIS

       vfs objects = fileid

DESCRIPTION

       This VFS module is part of the samba(7) suite.

       Samba uses file_id structs to uniquely identify files for locking purpose. By default the
       file_id contains the device and inode number returned by the stat() system call. As the
       file_id is a unique identifier of a file, it must be the same on all nodes in a cluster
       setup. This module overloads the SMB_VFS_FILE_ID_CREATE() operation and generates the
       device number based on the configured algorithm (see the "fileid:algorithm" option).

OPTIONS

       fileid:algorithm = ALGORITHM
           Available algorithms are fsname and fsid. The default value is fsname.

           The fsname algorithm generates device id by hashing the kernel device name.

           The fsid algorithm generates the device id from the f_fsid returned from the statfs()
           syscall.

       fileid:mapping = ALGORITHM
           This option is the legacy version of the fileid:algorithm option, which was used in
           earlier versions of fileid mapping feature in custom Samba 3.0 versions.

EXAMPLES

       Usage of the fileid module with the fsid algorithm:

                   [global]
                vfs objects = fileid
                fileid:algorithm = fsid

VERSION

       This man page is correct for version 3.2 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.