1config CIFS
2	tristate "CIFS support (advanced network filesystem, SMBFS successor)"
3	depends on INET
4	select NLS
5	select CRYPTO
6	select CRYPTO_MD4
7	select CRYPTO_MD5
8	select CRYPTO_HMAC
9	select CRYPTO_ARC4
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
29config 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
36config 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
50config 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
77config CIFS_UPCALL
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.
86
87config 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
103config 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
115config 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
126config CIFS_DFS_UPCALL
127	  bool "DFS feature support"
128	  depends on CIFS && KEYS
129	  select DNS_RESOLVER
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
139config 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
148config 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
155config CIFS_EXPERIMENTAL
156	  bool "CIFS Experimental Features (EXPERIMENTAL)"
157	  depends on CIFS && EXPERIMENTAL
158	  help
159	    Enables cifs features under testing. These features are
160	    experimental and currently include DFS support and directory
161	    change notification ie fcntl(F_DNOTIFY), as well as the upcall
162	    mechanism which will be used for Kerberos session negotiation
163	    and uid remapping.  Some of these features also may depend on
164	    setting a value of 1 to the pseudo-file /proc/fs/cifs/Experimental
165	    (which is disabled by default). See the file fs/cifs/README
166	    for more details.  If unsure, say N.
167
168