config CIFS
  	tristate "CIFS support (advanced network filesystem, SMBFS successor)"
  	depends on INET
  	select NLS

  	select CRYPTO

  	select CRYPTO_MD4

  	select CRYPTO_MD5

  	select CRYPTO_HMAC

  	select CRYPTO_ARC4

  	select CRYPTO_ECB

  	select CRYPTO_DES

  	select CRYPTO_SHA256

  	select CRYPTO_CMAC

  	help
  	  This is the client VFS module for the Common Internet File System
  	  (CIFS) protocol which is the successor to the Server Message Block
  	  (SMB) protocol, the native file sharing mechanism for most early
  	  PC operating systems.  The CIFS protocol is fully supported by

  	  file servers such as Windows 2000 (including Windows 2003, Windows 2008,
  	  NT 4 and Windows XP) as well by Samba (which provides excellent CIFS

  	  server support for Linux and many other operating systems). Limited
  	  support for OS/2 and Windows ME and similar servers is provided as
  	  well.

  	  The module also provides optional support for the followon
  	  protocols for CIFS including SMB3, which enables
  	  useful performance and security features (see the description
  	  of CONFIG_CIFS_SMB2).

  	  The cifs module provides an advanced network file system
  	  client for mounting to CIFS compliant servers.  It includes
  	  support for DFS (hierarchical name space), secure per-user
  	  session establishment via Kerberos or NTLM or NTLMv2,
  	  safe distributed caching (oplock), optional packet
  	  signing, Unicode and other internationalization improvements.
  	  If you need to mount to Samba or Windows from this machine, say Y.
  
  config CIFS_STATS
          bool "CIFS statistics"
          depends on CIFS
          help
            Enabling this option will cause statistics for each server share
  	  mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
  
  config CIFS_STATS2
  	bool "Extended statistics"
  	depends on CIFS_STATS
  	help
  	  Enabling this option will allow more detailed statistics on SMB
  	  request timing to be displayed in /proc/fs/cifs/DebugData and also
  	  allow optional logging of slow responses to dmesg (depending on the
  	  value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
  	  These additional statistics may have a minor effect on performance
  	  and memory utilization.
  
  	  Unless you are a developer or are doing network performance analysis
  	  or tuning, say N.
  
  config CIFS_WEAK_PW_HASH
  	bool "Support legacy servers which use weaker LANMAN security"
  	depends on CIFS
  	help
  	  Modern CIFS servers including Samba and most Windows versions
  	  (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
  	  security mechanisms. These hash the password more securely
  	  than the mechanisms used in the older LANMAN version of the
  	  SMB protocol but LANMAN based authentication is needed to
  	  establish sessions with some old SMB servers.
  
  	  Enabling this option allows the cifs module to mount to older
  	  LANMAN based servers such as OS/2 and Windows 95, but such
  	  mounts may be less secure than mounts using NTLM or more recent
  	  security mechanisms if you are on a public network.  Unless you
  	  have a need to access old SMB servers (and are on a private
  	  network) you probably want to say N.  Even if this support
  	  is enabled in the kernel build, LANMAN authentication will not be
  	  used automatically. At runtime LANMAN mounts are disabled but
  	  can be set to required (or optional) either in
  	  /proc/fs/cifs (see fs/cifs/README for more detail) or via an
  	  option on the mount command. This support is disabled by
  	  default in order to reduce the possibility of a downgrade
  	  attack.
  
  	  If unsure, say N.
  
  config CIFS_UPCALL

  	bool "Kerberos/SPNEGO advanced session setup"
  	depends on CIFS && KEYS
  	select DNS_RESOLVER
  	help
  	  Enables an upcall mechanism for CIFS which accesses userspace helper
  	  utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
  	  which are needed to mount to certain secure servers (for which more
  	  secure Kerberos authentication is required). If unsure, say N.

  
  config CIFS_XATTR
          bool "CIFS extended attributes"
          depends on CIFS
          help
            Extended attributes are name:value pairs associated with inodes by
            the kernel or by users (see the attr(5) manual page, or visit
            <http://acl.bestbits.at/> for details).  CIFS maps the name of
            extended attributes beginning with the user namespace prefix
            to SMB/CIFS EAs. EAs are stored on Windows servers without the
            user namespace prefix, but their names are seen by Linux cifs clients
            prefaced by the user namespace prefix. The system namespace
            (used by some filesystems to store ACLs) is not supported at
            this time.
  
            If unsure, say N.
  
  config CIFS_POSIX
          bool "CIFS POSIX Extensions"
          depends on CIFS_XATTR
          help
            Enabling this option will cause the cifs client to attempt to
  	  negotiate a newer dialect with servers, such as Samba 3.0.5
  	  or later, that optionally can handle more POSIX like (rather
  	  than Windows like) file behavior.  It also enables
  	  support for POSIX ACLs (getfacl and setfacl) to servers
  	  (such as Samba 3.10 and later) which can negotiate
  	  CIFS POSIX ACL support.  If unsure, say N.

  config CIFS_ACL
  	  bool "Provide CIFS ACL support"
  	  depends on CIFS_XATTR && KEYS
  	  help
  	    Allows fetching CIFS/NTFS ACL from the server.  The DACL blob

  	    is handed over to the application/caller.  See the man
  	    page for getcifsacl for more information.

  config CIFS_DEBUG
  	bool "Enable CIFS debugging routines"
  	default y
  	depends on CIFS
  	help
  	   Enabling this option adds helpful debugging messages to
  	   the cifs code which increases the size of the cifs module.
  	   If unsure, say Y.

  config CIFS_DEBUG2
  	bool "Enable additional CIFS debugging routines"

  	depends on CIFS_DEBUG

  	help
  	   Enabling this option adds a few more debugging routines
  	   to the cifs code which slightly increases the size of
  	   the cifs module and can cause additional logging of debug
  	   messages in some error paths, slowing performance. This
  	   option can be turned off unless you are debugging
  	   cifs problems.  If unsure, say N.

  config CIFS_DFS_UPCALL
  	  bool "DFS feature support"
  	  depends on CIFS && KEYS

  	  select DNS_RESOLVER

  	  help
  	    Distributed File System (DFS) support is used to access shares
  	    transparently in an enterprise name space, even if the share
  	    moves to a different server.  This feature also enables
  	    an upcall mechanism for CIFS which contacts userspace helper
  	    utilities to provide server name resolution (host names to
  	    IP addresses) which is needed for implicit mounts of DFS junction
  	    points. If unsure, say N.

  config CIFS_NFSD_EXPORT

  	  bool "Allow nfsd to export CIFS file system"
  	  depends on CIFS && BROKEN

  	  help

  	   Allows NFS server to export a CIFS mounted share (nfsd over cifs)

  
  config CIFS_SMB2

  	bool "SMB2 and SMB3 network file system support"

  	depends on CIFS && INET

  	select NLS
  	select KEYS
  	select FSCACHE
  	select DNS_RESOLVER
  
  	help

  	  This enables support for the Server Message Block version 2
  	  family of protocols, including SMB3.  SMB3 support is
  	  enabled on mount by specifying "vers=3.0" in the mount
  	  options. These protocols are the successors to the popular
  	  CIFS and SMB network file sharing protocols. SMB3 is the
  	  native file sharing mechanism for the more recent
  	  versions of Windows (Windows 8 and Windows 2012 and
  	  later) and Samba server and many others support SMB3 well.
  	  In general SMB3 enables better performance, security
  	  and features, than would be possible with CIFS (Note that
  	  when mounting to Samba, due to the CIFS POSIX extensions,
  	  CIFS mounts can provide slightly better POSIX compatibility
  	  than SMB3 mounts do though). Note that SMB2/SMB3 mount
  	  options are also slightly simpler (compared to CIFS) due
  	  to protocol improvements.

  config CIFS_SMB311
  	bool "SMB3.1.1 network file system support (Experimental)"
  	depends on CIFS_SMB2 && INET
  
  	help
  	  This enables experimental support for the newest, SMB3.1.1, dialect.
  	  This dialect includes improved security negotiation features.
  	  If unsure, say N

  config CIFS_FSCACHE
  	  bool "Provide CIFS client caching support"
  	  depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
  	  help
  	    Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
  	    to be cached locally on disk through the general filesystem cache
  	    manager. If unsure, say N.