[mirror_ubuntu-artful-kernel.git] / fs / cifs / Kconfig

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
	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, 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 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_DEBUG2
	bool "Enable additional CIFS debugging routines"
	depends on CIFS
	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_FSCACHE
	  bool "Provide CIFS client caching support (EXPERIMENTAL)"
	  depends on EXPERIMENTAL
	  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.

config CIFS_ACL
	  bool "Provide CIFS ACL support (EXPERIMENTAL)"
	  depends on EXPERIMENTAL && CIFS_XATTR
	  help
	    Allows to fetch CIFS/NTFS ACL from the server.  The DACL blob
	    is handed over to the application/caller.

config CIFS_SMB2
	bool "SMB2 network file system support (EXPERIMENTAL)"
	depends on EXPERIMENTAL && INET && BROKEN
	select NLS
	select KEYS
	select FSCACHE
	select DNS_RESOLVER

	help
	  This enables experimental support for the SMB2 (Server Message Block
	  version 2) protocol. The SMB2 protocol is the successor to the
	  popular CIFS and SMB network file sharing protocols. SMB2 is the
	  native file sharing mechanism for recent versions of Windows
	  operating systems (since Vista).  SMB2 enablement will eventually
	  allow users better performance, security and features, than would be
	  possible with cifs. Note that smb2 mount options also are simpler
	  (compared to cifs) due to protocol improvements.

	  Unless you are a developer or tester, say N.

config CIFS_NFSD_EXPORT
	  bool "Allow nfsd to export CIFS file system (EXPERIMENTAL)"
	  depends on CIFS && EXPERIMENTAL
	  help
	   Allows NFS server to export a CIFS mounted share (nfsd over cifs)
Commit	Line	Data
bb26b963 AD	1	config CIFS
	2	tristate "CIFS support (advanced network filesystem, SMBFS successor)"
	3	depends on INET
	4	select NLS
d2b91521	5	select CRYPTO
f855f6cb	6	select CRYPTO_MD4
d2b91521	7	select CRYPTO_MD5
362d3129	8	select CRYPTO_HMAC
d2b91521	9	select CRYPTO_ARC4
bb26b963 AD	10	help
	11	This is the client VFS module for the Common Internet File System
	12	(CIFS) protocol which is the successor to the Server Message Block
	13	(SMB) protocol, the native file sharing mechanism for most early
	14	PC operating systems. The CIFS protocol is fully supported by
	15	file servers such as Windows 2000 (including Windows 2003, NT 4
	16	and Windows XP) as well by Samba (which provides excellent CIFS
	17	server support for Linux and many other operating systems). Limited
	18	support for OS/2 and Windows ME and similar servers is provided as
	19	well.
	20
	21	The cifs module provides an advanced network file system
	22	client for mounting to CIFS compliant servers. It includes
	23	support for DFS (hierarchical name space), secure per-user
	24	session establishment via Kerberos or NTLM or NTLMv2,
	25	safe distributed caching (oplock), optional packet
	26	signing, Unicode and other internationalization improvements.
	27	If you need to mount to Samba or Windows from this machine, say Y.
	28
	29	config CIFS_STATS
	30	bool "CIFS statistics"
	31	depends on CIFS
	32	help
	33	Enabling this option will cause statistics for each server share
	34	mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
	35
	36	config CIFS_STATS2
	37	bool "Extended statistics"
	38	depends on CIFS_STATS
	39	help
	40	Enabling this option will allow more detailed statistics on SMB
	41	request timing to be displayed in /proc/fs/cifs/DebugData and also
	42	allow optional logging of slow responses to dmesg (depending on the
	43	value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
	44	These additional statistics may have a minor effect on performance
	45	and memory utilization.
	46
	47	Unless you are a developer or are doing network performance analysis
	48	or tuning, say N.
	49
	50	config CIFS_WEAK_PW_HASH
	51	bool "Support legacy servers which use weaker LANMAN security"
	52	depends on CIFS
	53	help
	54	Modern CIFS servers including Samba and most Windows versions
	55	(since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
	56	security mechanisms. These hash the password more securely
	57	than the mechanisms used in the older LANMAN version of the
	58	SMB protocol but LANMAN based authentication is needed to
	59	establish sessions with some old SMB servers.
	60
	61	Enabling this option allows the cifs module to mount to older
	62	LANMAN based servers such as OS/2 and Windows 95, but such
	63	mounts may be less secure than mounts using NTLM or more recent
	64	security mechanisms if you are on a public network. Unless you
	65	have a need to access old SMB servers (and are on a private
	66	network) you probably want to say N. Even if this support
	67	is enabled in the kernel build, LANMAN authentication will not be
	68	used automatically. At runtime LANMAN mounts are disabled but
	69	can be set to required (or optional) either in
	70	/proc/fs/cifs (see fs/cifs/README for more detail) or via an
	71	option on the mount command. This support is disabled by
	72	default in order to reduce the possibility of a downgrade
	73	attack.
74
75	If unsure, say N.
76
77	config CIFS_UPCALL
1a4240f4 WL	78	bool "Kerberos/SPNEGO advanced session setup"
	79	depends on CIFS && KEYS
	80	select DNS_RESOLVER
	81	help
	82	Enables an upcall mechanism for CIFS which accesses userspace helper
	83	utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
	84	which are needed to mount to certain secure servers (for which more
	85	secure Kerberos authentication is required). If unsure, say N.
bb26b963 AD	86
	87	config CIFS_XATTR
	88	bool "CIFS extended attributes"
	89	depends on CIFS
	90	help
	91	Extended attributes are name:value pairs associated with inodes by
	92	the kernel or by users (see the attr(5) manual page, or visit
	93	<http://acl.bestbits.at/> for details). CIFS maps the name of
	94	extended attributes beginning with the user namespace prefix
	95	to SMB/CIFS EAs. EAs are stored on Windows servers without the
	96	user namespace prefix, but their names are seen by Linux cifs clients
	97	prefaced by the user namespace prefix. The system namespace
	98	(used by some filesystems to store ACLs) is not supported at
	99	this time.
	100
	101	If unsure, say N.
	102
	103	config CIFS_POSIX
	104	bool "CIFS POSIX Extensions"
	105	depends on CIFS_XATTR
	106	help
	107	Enabling this option will cause the cifs client to attempt to
	108	negotiate a newer dialect with servers, such as Samba 3.0.5
	109	or later, that optionally can handle more POSIX like (rather
	110	than Windows like) file behavior. It also enables
	111	support for POSIX ACLs (getfacl and setfacl) to servers
	112	(such as Samba 3.10 and later) which can negotiate
	113	CIFS POSIX ACL support. If unsure, say N.
	114
	115	config CIFS_DEBUG2
	116	bool "Enable additional CIFS debugging routines"
	117	depends on CIFS
	118	help
	119	Enabling this option adds a few more debugging routines
	120	to the cifs code which slightly increases the size of
	121	the cifs module and can cause additional logging of debug
	122	messages in some error paths, slowing performance. This
	123	option can be turned off unless you are debugging
	124	cifs problems. If unsure, say N.
	125
10e70afa SF	126	config CIFS_DFS_UPCALL
	127	bool "DFS feature support"
	128	depends on CIFS && KEYS
1a4240f4	129	select DNS_RESOLVER
10e70afa SF	130	help
	131	Distributed File System (DFS) support is used to access shares
	132	transparently in an enterprise name space, even if the share
	133	moves to a different server. This feature also enables
	134	an upcall mechanism for CIFS which contacts userspace helper
	135	utilities to provide server name resolution (host names to
	136	IP addresses) which is needed for implicit mounts of DFS junction
	137	points. If unsure, say N.
	138
3feb41cf SJ	139	config CIFS_FSCACHE
	140	bool "Provide CIFS client caching support (EXPERIMENTAL)"
	141	depends on EXPERIMENTAL
	142	depends on CIFS=m && FSCACHE \|\| CIFS=y && FSCACHE=y
	143	help
	144	Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
	145	to be cached locally on disk through the general filesystem cache
	146	manager. If unsure, say N.
	147
fbeba8bb SP	148	config CIFS_ACL
	149	bool "Provide CIFS ACL support (EXPERIMENTAL)"
	150	depends on EXPERIMENTAL && CIFS_XATTR
	151	help
	152	Allows to fetch CIFS/NTFS ACL from the server. The DACL blob
	153	is handed over to the application/caller.
	154
b34cb85c SF	155	config CIFS_SMB2
	156	bool "SMB2 network file system support (EXPERIMENTAL)"
	157	depends on EXPERIMENTAL && INET && BROKEN
	158	select NLS
	159	select KEYS
	160	select FSCACHE
	161	select DNS_RESOLVER
	162
	163	help
	164	This enables experimental support for the SMB2 (Server Message Block
	165	version 2) protocol. The SMB2 protocol is the successor to the
	166	popular CIFS and SMB network file sharing protocols. SMB2 is the
	167	native file sharing mechanism for recent versions of Windows
	168	operating systems (since Vista). SMB2 enablement will eventually
	169	allow users better performance, security and features, than would be
	170	possible with cifs. Note that smb2 mount options also are simpler
	171	(compared to cifs) due to protocol improvements.
	172
	173	Unless you are a developer or tester, say N.
	174
25720873 SP	175	config CIFS_NFSD_EXPORT
25720873 SP	176	bool "Allow nfsd to export CIFS file system (EXPERIMENTAL)"
bb26b963 AD	177	depends on CIFS && EXPERIMENTAL
bb26b963 AD	178	help
25720873	179	Allows NFS server to export a CIFS mounted share (nfsd over cifs)