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============
Introduction
============
This is the client VFS module for the SMB3 NAS protocol as well
as for older dialects such as the Common Internet File System (CIFS)
protocol which was the successor to the Server Message Block
(SMB) protocol, the native file sharing mechanism for most early
PC operating systems. New and improved versions of CIFS are now
called SMB2 and SMB3. Use of SMB3 (and later, including SMB3.1.1
the most current dialect) is strongly preferred over using older
dialects like CIFS due to security reasons. All modern dialects,
including the most recent, SMB3.1.1, are supported by the CIFS VFS
module. The SMB3 protocol is implemented and supported by all major
file servers such as Windows (including Windows 2019 Server), as
well as by Samba (which provides excellent CIFS/SMB2/SMB3 server
support and tools for Linux and many other operating systems).
Apple systems also support SMB3 well, as do most Network Attached
Storage vendors, so this network filesystem client can mount to a
wide variety of systems. It also supports mounting to the cloud
(for example Microsoft Azure), including the necessary security
features.
The intent of this module is to provide the most advanced network
file system function for SMB3 compliant servers, including advanced
security features, excellent parallelized high performance i/o, better
POSIX compliance, secure per-user session establishment, encryption,
high performance safe distributed caching (leases/oplocks), optional packet
signing, large files, Unicode support and other internationalization
improvements. Since both Samba server and this filesystem client support the
CIFS Unix extensions, and the Linux client also suppors SMB3 POSIX extensions,
the combination can provide a reasonable alternative to other network and
cluster file systems for fileserving in some Linux to Linux environments,
not just in Linux to Windows (or Linux to Mac) environments.
This filesystem has a mount utility (mount.cifs) and various user space
tools (including smbinfo and setcifsacl) that can be obtained from
https://git.samba.org/?p=cifs-utils.git
or
git://git.samba.org/cifs-utils.git
mount.cifs should be installed in the directory with the other mount helpers.
For more information on the module see the project wiki page at
https://wiki.samba.org/index.php/LinuxCIFS
and
https://wiki.samba.org/index.php/LinuxCIFS_utils
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