vfs_fileid - Generates file_id structs with unique device id values for cluster setups
vfs objects = fileid
System Administration tools VFS_FILEID(8)
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.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+-----------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------------+
|Availability | service/network/samba |
+---------------+-----------------------+
|Stability | Volatile |
+---------------+-----------------------+
NOTES
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from
https://download.samba.org/pub/samba/stable/samba-4.7.6.tar.gz
Further information about this software can be found on the open source
community website at http://www.samba.org/.
Samba 4.7 08/01/2018 VFS_FILEID(8)