2 tristate "CIFS support (advanced network filesystem, SMBFS successor)"
13 This is the client VFS module for the Common Internet File System
14 (CIFS) protocol which is the successor to the Server Message Block
15 (SMB) protocol, the native file sharing mechanism for most early
16 PC operating systems. The CIFS protocol is fully supported by
17 file servers such as Windows 2000 (including Windows 2003, NT 4
18 and Windows XP) as well by Samba (which provides excellent CIFS
19 server support for Linux and many other operating systems). Limited
20 support for OS/2 and Windows ME and similar servers is provided as
23 The cifs module provides an advanced network file system
24 client for mounting to CIFS compliant servers. It includes
25 support for DFS (hierarchical name space), secure per-user
26 session establishment via Kerberos or NTLM or NTLMv2,
27 safe distributed caching (oplock), optional packet
28 signing, Unicode and other internationalization improvements.
29 If you need to mount to Samba or Windows from this machine, say Y.
32 bool "CIFS statistics"
35 Enabling this option will cause statistics for each server share
36 mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
39 bool "Extended statistics"
42 Enabling this option will allow more detailed statistics on SMB
43 request timing to be displayed in /proc/fs/cifs/DebugData and also
44 allow optional logging of slow responses to dmesg (depending on the
45 value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
46 These additional statistics may have a minor effect on performance
47 and memory utilization.
49 Unless you are a developer or are doing network performance analysis
52 config CIFS_WEAK_PW_HASH
53 bool "Support legacy servers which use weaker LANMAN security"
56 Modern CIFS servers including Samba and most Windows versions
57 (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
58 security mechanisms. These hash the password more securely
59 than the mechanisms used in the older LANMAN version of the
60 SMB protocol but LANMAN based authentication is needed to
61 establish sessions with some old SMB servers.
63 Enabling this option allows the cifs module to mount to older
64 LANMAN based servers such as OS/2 and Windows 95, but such
65 mounts may be less secure than mounts using NTLM or more recent
66 security mechanisms if you are on a public network. Unless you
67 have a need to access old SMB servers (and are on a private
68 network) you probably want to say N. Even if this support
69 is enabled in the kernel build, LANMAN authentication will not be
70 used automatically. At runtime LANMAN mounts are disabled but
71 can be set to required (or optional) either in
72 /proc/fs/cifs (see fs/cifs/README for more detail) or via an
73 option on the mount command. This support is disabled by
74 default in order to reduce the possibility of a downgrade
80 bool "Kerberos/SPNEGO advanced session setup"
81 depends on CIFS && KEYS
84 Enables an upcall mechanism for CIFS which accesses userspace helper
85 utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
86 which are needed to mount to certain secure servers (for which more
87 secure Kerberos authentication is required). If unsure, say N.
90 bool "CIFS extended attributes"
93 Extended attributes are name:value pairs associated with inodes by
94 the kernel or by users (see the attr(5) manual page, or visit
95 <http://acl.bestbits.at/> for details). CIFS maps the name of
96 extended attributes beginning with the user namespace prefix
97 to SMB/CIFS EAs. EAs are stored on Windows servers without the
98 user namespace prefix, but their names are seen by Linux cifs clients
99 prefaced by the user namespace prefix. The system namespace
100 (used by some filesystems to store ACLs) is not supported at
106 bool "CIFS POSIX Extensions"
107 depends on CIFS_XATTR
109 Enabling this option will cause the cifs client to attempt to
110 negotiate a newer dialect with servers, such as Samba 3.0.5
111 or later, that optionally can handle more POSIX like (rather
112 than Windows like) file behavior. It also enables
113 support for POSIX ACLs (getfacl and setfacl) to servers
114 (such as Samba 3.10 and later) which can negotiate
115 CIFS POSIX ACL support. If unsure, say N.
118 bool "Enable additional CIFS debugging routines"
121 Enabling this option adds a few more debugging routines
122 to the cifs code which slightly increases the size of
123 the cifs module and can cause additional logging of debug
124 messages in some error paths, slowing performance. This
125 option can be turned off unless you are debugging
126 cifs problems. If unsure, say N.
128 config CIFS_DFS_UPCALL
129 bool "DFS feature support"
130 depends on CIFS && KEYS
133 Distributed File System (DFS) support is used to access shares
134 transparently in an enterprise name space, even if the share
135 moves to a different server. This feature also enables
136 an upcall mechanism for CIFS which contacts userspace helper
137 utilities to provide server name resolution (host names to
138 IP addresses) which is needed for implicit mounts of DFS junction
139 points. If unsure, say N.
142 bool "Provide CIFS client caching support"
143 depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
145 Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
146 to be cached locally on disk through the general filesystem cache
147 manager. If unsure, say N.
150 bool "Provide CIFS ACL support"
151 depends on CIFS_XATTR && KEYS
153 Allows to fetch CIFS/NTFS ACL from the server. The DACL blob
154 is handed over to the application/caller.
156 config CIFS_NFSD_EXPORT
157 bool "Allow nfsd to export CIFS file system (EXPERIMENTAL)"
158 depends on CIFS && EXPERIMENTAL && BROKEN
160 Allows NFS server to export a CIFS mounted share (nfsd over cifs)