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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
Jeff Laytonf855f6c2011-01-31 08:41:36 -05006 select CRYPTO_MD4
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05007 select CRYPTO_MD5
Steve French362d3122010-11-14 03:34:30 +00008 select CRYPTO_HMAC
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05009 select CRYPTO_ARC4
Alexey Dobriyanbb26b962008-10-18 20:28:49 -070010 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
Wang Lei1a4240f2010-08-04 15:16:33 +010078 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.
Alexey Dobriyanbb26b962008-10-18 20:28:49 -070086
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
Steve French10e70af2009-02-22 01:33:07 +0000126config CIFS_DFS_UPCALL
127 bool "DFS feature support"
128 depends on CIFS && KEYS
Wang Lei1a4240f2010-08-04 15:16:33 +0100129 select DNS_RESOLVER
Steve French10e70af2009-02-22 01:33:07 +0000130 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
Suresh Jayaraman3feb41c2010-07-05 18:11:33 +0530139config 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
Shirish Pargaonkarfbeba8b2010-11-27 11:37:54 -0600148config 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
Alexey Dobriyanbb26b962008-10-18 20:28:49 -0700155config 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