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Alexey Dobriyanbb26b962008-10-18 20:28:49 -07001config CIFS
2 tristate "CIFS support (advanced network filesystem, SMBFS successor)"
3 depends on INET
4 select NLS
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05005 select CRYPTO
6 select CRYPTO_MD5
Steve French362d3122010-11-14 03:34:30 +00007 select CRYPTO_HMAC
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05008 select CRYPTO_ARC4
Alexey Dobriyanbb26b962008-10-18 20:28:49 -07009 help
10 This is the client VFS module for the Common Internet File System
11 (CIFS) protocol which is the successor to the Server Message Block
12 (SMB) protocol, the native file sharing mechanism for most early
13 PC operating systems. The CIFS protocol is fully supported by
14 file servers such as Windows 2000 (including Windows 2003, NT 4
15 and Windows XP) as well by Samba (which provides excellent CIFS
16 server support for Linux and many other operating systems). Limited
17 support for OS/2 and Windows ME and similar servers is provided as
18 well.
19
20 The cifs module provides an advanced network file system
21 client for mounting to CIFS compliant servers. It includes
22 support for DFS (hierarchical name space), secure per-user
23 session establishment via Kerberos or NTLM or NTLMv2,
24 safe distributed caching (oplock), optional packet
25 signing, Unicode and other internationalization improvements.
26 If you need to mount to Samba or Windows from this machine, say Y.
27
28config CIFS_STATS
29 bool "CIFS statistics"
30 depends on CIFS
31 help
32 Enabling this option will cause statistics for each server share
33 mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
34
35config CIFS_STATS2
36 bool "Extended statistics"
37 depends on CIFS_STATS
38 help
39 Enabling this option will allow more detailed statistics on SMB
40 request timing to be displayed in /proc/fs/cifs/DebugData and also
41 allow optional logging of slow responses to dmesg (depending on the
42 value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
43 These additional statistics may have a minor effect on performance
44 and memory utilization.
45
46 Unless you are a developer or are doing network performance analysis
47 or tuning, say N.
48
49config CIFS_WEAK_PW_HASH
50 bool "Support legacy servers which use weaker LANMAN security"
51 depends on CIFS
52 help
53 Modern CIFS servers including Samba and most Windows versions
54 (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
55 security mechanisms. These hash the password more securely
56 than the mechanisms used in the older LANMAN version of the
57 SMB protocol but LANMAN based authentication is needed to
58 establish sessions with some old SMB servers.
59
60 Enabling this option allows the cifs module to mount to older
61 LANMAN based servers such as OS/2 and Windows 95, but such
62 mounts may be less secure than mounts using NTLM or more recent
63 security mechanisms if you are on a public network. Unless you
64 have a need to access old SMB servers (and are on a private
65 network) you probably want to say N. Even if this support
66 is enabled in the kernel build, LANMAN authentication will not be
67 used automatically. At runtime LANMAN mounts are disabled but
68 can be set to required (or optional) either in
69 /proc/fs/cifs (see fs/cifs/README for more detail) or via an
70 option on the mount command. This support is disabled by
71 default in order to reduce the possibility of a downgrade
72 attack.
73
74 If unsure, say N.
75
76config CIFS_UPCALL
Wang Lei1a4240f2010-08-04 15:16:33 +010077 bool "Kerberos/SPNEGO advanced session setup"
78 depends on CIFS && KEYS
79 select DNS_RESOLVER
80 help
81 Enables an upcall mechanism for CIFS which accesses userspace helper
82 utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
83 which are needed to mount to certain secure servers (for which more
84 secure Kerberos authentication is required). If unsure, say N.
Alexey Dobriyanbb26b962008-10-18 20:28:49 -070085
86config CIFS_XATTR
87 bool "CIFS extended attributes"
88 depends on CIFS
89 help
90 Extended attributes are name:value pairs associated with inodes by
91 the kernel or by users (see the attr(5) manual page, or visit
92 <http://acl.bestbits.at/> for details). CIFS maps the name of
93 extended attributes beginning with the user namespace prefix
94 to SMB/CIFS EAs. EAs are stored on Windows servers without the
95 user namespace prefix, but their names are seen by Linux cifs clients
96 prefaced by the user namespace prefix. The system namespace
97 (used by some filesystems to store ACLs) is not supported at
98 this time.
99
100 If unsure, say N.
101
102config CIFS_POSIX
103 bool "CIFS POSIX Extensions"
104 depends on CIFS_XATTR
105 help
106 Enabling this option will cause the cifs client to attempt to
107 negotiate a newer dialect with servers, such as Samba 3.0.5
108 or later, that optionally can handle more POSIX like (rather
109 than Windows like) file behavior. It also enables
110 support for POSIX ACLs (getfacl and setfacl) to servers
111 (such as Samba 3.10 and later) which can negotiate
112 CIFS POSIX ACL support. If unsure, say N.
113
114config CIFS_DEBUG2
115 bool "Enable additional CIFS debugging routines"
116 depends on CIFS
117 help
118 Enabling this option adds a few more debugging routines
119 to the cifs code which slightly increases the size of
120 the cifs module and can cause additional logging of debug
121 messages in some error paths, slowing performance. This
122 option can be turned off unless you are debugging
123 cifs problems. If unsure, say N.
124
Steve French10e70af2009-02-22 01:33:07 +0000125config CIFS_DFS_UPCALL
126 bool "DFS feature support"
127 depends on CIFS && KEYS
Wang Lei1a4240f2010-08-04 15:16:33 +0100128 select DNS_RESOLVER
Steve French10e70af2009-02-22 01:33:07 +0000129 help
130 Distributed File System (DFS) support is used to access shares
131 transparently in an enterprise name space, even if the share
132 moves to a different server. This feature also enables
133 an upcall mechanism for CIFS which contacts userspace helper
134 utilities to provide server name resolution (host names to
135 IP addresses) which is needed for implicit mounts of DFS junction
136 points. If unsure, say N.
137
Suresh Jayaraman3feb41c2010-07-05 18:11:33 +0530138config CIFS_FSCACHE
139 bool "Provide CIFS client caching support (EXPERIMENTAL)"
140 depends on EXPERIMENTAL
141 depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
142 help
143 Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
144 to be cached locally on disk through the general filesystem cache
145 manager. If unsure, say N.
146
Alexey Dobriyanbb26b962008-10-18 20:28:49 -0700147config CIFS_EXPERIMENTAL
148 bool "CIFS Experimental Features (EXPERIMENTAL)"
149 depends on CIFS && EXPERIMENTAL
150 help
151 Enables cifs features under testing. These features are
152 experimental and currently include DFS support and directory
153 change notification ie fcntl(F_DNOTIFY), as well as the upcall
154 mechanism which will be used for Kerberos session negotiation
155 and uid remapping. Some of these features also may depend on
156 setting a value of 1 to the pseudo-file /proc/fs/cifs/Experimental
157 (which is disabled by default). See the file fs/cifs/README
158 for more details. If unsure, say N.
159