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gerrit-public.fairphone.software / kernel / msm / 663dd6dcaf7e95526e469e91f41972a9c0cca30c / . / fs / cifs / Kconfig
blob: 1cd4c3a1862d72491432bd4a017782e78b331dcd [file] [log] [blame]
Alexey Dobriyanbb26b962008-10-18 20:28:49 -0700[diff] [blame]1config CIFS
2 tristate "CIFS support (advanced network filesystem, SMBFS successor)"
3 depends on INET
4 select NLS
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500[diff] [blame]5 select CRYPTO
Jeff Laytonf855f6c2011-01-31 08:41:36 -0500[diff] [blame]6 select CRYPTO_MD4
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500[diff] [blame]7 select CRYPTO_MD5
Steve French362d3122010-11-14 03:34:30 +0000[diff] [blame]8 select CRYPTO_HMAC
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500[diff] [blame]9 select CRYPTO_ARC4
Steve French43988d72011-04-19 18:23:31 +0000[diff] [blame]10 select CRYPTO_DES
Alexey Dobriyanbb26b962008-10-18 20:28:49 -0700[diff] [blame]11 help
12 This is the client VFS module for the Common Internet File System
13 (CIFS) protocol which is the successor to the Server Message Block
14 (SMB) protocol, the native file sharing mechanism for most early
15 PC operating systems. The CIFS protocol is fully supported by
16 file servers such as Windows 2000 (including Windows 2003, NT 4
17 and Windows XP) as well by Samba (which provides excellent CIFS
18 server support for Linux and many other operating systems). Limited
19 support for OS/2 and Windows ME and similar servers is provided as
20 well.
21
22 The cifs module provides an advanced network file system
23 client for mounting to CIFS compliant servers. It includes
24 support for DFS (hierarchical name space), secure per-user
25 session establishment via Kerberos or NTLM or NTLMv2,
26 safe distributed caching (oplock), optional packet
27 signing, Unicode and other internationalization improvements.
28 If you need to mount to Samba or Windows from this machine, say Y.
29
30config CIFS_STATS
31 bool "CIFS statistics"
32 depends on CIFS
33 help
34 Enabling this option will cause statistics for each server share
35 mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
36
37config CIFS_STATS2
38 bool "Extended statistics"
39 depends on CIFS_STATS
40 help
41 Enabling this option will allow more detailed statistics on SMB
42 request timing to be displayed in /proc/fs/cifs/DebugData and also
43 allow optional logging of slow responses to dmesg (depending on the
44 value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
45 These additional statistics may have a minor effect on performance
46 and memory utilization.
47
48 Unless you are a developer or are doing network performance analysis
49 or tuning, say N.
50
51config CIFS_WEAK_PW_HASH
52 bool "Support legacy servers which use weaker LANMAN security"
53 depends on CIFS
54 help
55 Modern CIFS servers including Samba and most Windows versions
56 (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
57 security mechanisms. These hash the password more securely
58 than the mechanisms used in the older LANMAN version of the
59 SMB protocol but LANMAN based authentication is needed to
60 establish sessions with some old SMB servers.
61
62 Enabling this option allows the cifs module to mount to older
63 LANMAN based servers such as OS/2 and Windows 95, but such
64 mounts may be less secure than mounts using NTLM or more recent
65 security mechanisms if you are on a public network. Unless you
66 have a need to access old SMB servers (and are on a private
67 network) you probably want to say N. Even if this support
68 is enabled in the kernel build, LANMAN authentication will not be
69 used automatically. At runtime LANMAN mounts are disabled but
70 can be set to required (or optional) either in
71 /proc/fs/cifs (see fs/cifs/README for more detail) or via an
72 option on the mount command. This support is disabled by
73 default in order to reduce the possibility of a downgrade
74 attack.
75
76 If unsure, say N.
77
78config CIFS_UPCALL
Wang Lei1a4240f2010-08-04 15:16:33 +0100[diff] [blame]79 bool "Kerberos/SPNEGO advanced session setup"
80 depends on CIFS && KEYS
81 select DNS_RESOLVER
82 help
83 Enables an upcall mechanism for CIFS which accesses userspace helper
84 utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
85 which are needed to mount to certain secure servers (for which more
86 secure Kerberos authentication is required). If unsure, say N.
Alexey Dobriyanbb26b962008-10-18 20:28:49 -0700[diff] [blame]87
88config CIFS_XATTR
89 bool "CIFS extended attributes"
90 depends on CIFS
91 help
92 Extended attributes are name:value pairs associated with inodes by
93 the kernel or by users (see the attr(5) manual page, or visit
94 <http://acl.bestbits.at/> for details). CIFS maps the name of
95 extended attributes beginning with the user namespace prefix
96 to SMB/CIFS EAs. EAs are stored on Windows servers without the
97 user namespace prefix, but their names are seen by Linux cifs clients
98 prefaced by the user namespace prefix. The system namespace
99 (used by some filesystems to store ACLs) is not supported at
100 this time.
101
102 If unsure, say N.
103
104config CIFS_POSIX
105 bool "CIFS POSIX Extensions"
106 depends on CIFS_XATTR
107 help
108 Enabling this option will cause the cifs client to attempt to
109 negotiate a newer dialect with servers, such as Samba 3.0.5
110 or later, that optionally can handle more POSIX like (rather
111 than Windows like) file behavior. It also enables
112 support for POSIX ACLs (getfacl and setfacl) to servers
113 (such as Samba 3.10 and later) which can negotiate
114 CIFS POSIX ACL support. If unsure, say N.
115
116config CIFS_DEBUG2
117 bool "Enable additional CIFS debugging routines"
118 depends on CIFS
119 help
120 Enabling this option adds a few more debugging routines
121 to the cifs code which slightly increases the size of
122 the cifs module and can cause additional logging of debug
123 messages in some error paths, slowing performance. This
124 option can be turned off unless you are debugging
125 cifs problems. If unsure, say N.
126
Steve French10e70af2009-02-22 01:33:07 +0000[diff] [blame]127config CIFS_DFS_UPCALL
128 bool "DFS feature support"
129 depends on CIFS && KEYS
Wang Lei1a4240f2010-08-04 15:16:33 +0100[diff] [blame]130 select DNS_RESOLVER
Steve French10e70af2009-02-22 01:33:07 +0000[diff] [blame]131 help
132 Distributed File System (DFS) support is used to access shares
133 transparently in an enterprise name space, even if the share
134 moves to a different server. This feature also enables
135 an upcall mechanism for CIFS which contacts userspace helper
136 utilities to provide server name resolution (host names to
137 IP addresses) which is needed for implicit mounts of DFS junction
138 points. If unsure, say N.
139
Suresh Jayaraman3feb41c2010-07-05 18:11:33 +0530[diff] [blame]140config CIFS_FSCACHE
141 bool "Provide CIFS client caching support (EXPERIMENTAL)"
142 depends on EXPERIMENTAL
143 depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
144 help
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.
148
Shirish Pargaonkarfbeba8b2010-11-27 11:37:54 -0600[diff] [blame]149config CIFS_ACL
150 bool "Provide CIFS ACL support (EXPERIMENTAL)"
151 depends on EXPERIMENTAL && CIFS_XATTR
152 help
153 Allows to fetch CIFS/NTFS ACL from the server. The DACL blob
154 is handed over to the application/caller.
155
Shirish Pargaonkar25720872011-02-25 10:48:55 -0600[diff] [blame]156config CIFS_NFSD_EXPORT
157 bool "Allow nfsd to export CIFS file system (EXPERIMENTAL)"
Alexey Dobriyanbb26b962008-10-18 20:28:49 -0700[diff] [blame]158 depends on CIFS && EXPERIMENTAL
159 help
Shirish Pargaonkar25720872011-02-25 10:48:55 -0600[diff] [blame]160 Allows NFS server to export a CIFS mounted share (nfsd over cifs)