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gerrit-public.fairphone.software / kernel / msm-4.19 / 5f0b23eeba2d9105944148e5a85b0bfb34a8ecf5 / . / fs / cifs / Kconfig
blob: 66c68ab9e7df7e46cc0a970a5223fa6c079bf8b8 [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
Suresh Jayaraman5f0b23e2011-06-03 14:19:01 +0530[diff] [blame^]10 select CRYPTO_ECB
Steve French43988d72011-04-19 18:23:31 +0000[diff] [blame]11 select CRYPTO_DES
Alexey Dobriyanbb26b962008-10-18 20:28:49 -0700[diff] [blame]12 help
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
21 well.
22
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.
30
31config CIFS_STATS
32 bool "CIFS statistics"
33 depends on CIFS
34 help
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
37
38config CIFS_STATS2
39 bool "Extended statistics"
40 depends on CIFS_STATS
41 help
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.
48
49 Unless you are a developer or are doing network performance analysis
50 or tuning, say N.
51
52config CIFS_WEAK_PW_HASH
53 bool "Support legacy servers which use weaker LANMAN security"
54 depends on CIFS
55 help
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.
62
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
75 attack.
76
77 If unsure, say N.
78
79config CIFS_UPCALL
Wang Lei1a4240f2010-08-04 15:16:33 +0100[diff] [blame]80 bool "Kerberos/SPNEGO advanced session setup"
81 depends on CIFS && KEYS
82 select DNS_RESOLVER
83 help
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.
Alexey Dobriyanbb26b962008-10-18 20:28:49 -0700[diff] [blame]88
89config CIFS_XATTR
90 bool "CIFS extended attributes"
91 depends on CIFS
92 help
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
101 this time.
102
103 If unsure, say N.
104
105config CIFS_POSIX
106 bool "CIFS POSIX Extensions"
107 depends on CIFS_XATTR
108 help
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.
116
117config CIFS_DEBUG2
118 bool "Enable additional CIFS debugging routines"
119 depends on CIFS
120 help
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.
127
Steve French10e70af2009-02-22 01:33:07 +0000[diff] [blame]128config CIFS_DFS_UPCALL
129 bool "DFS feature support"
130 depends on CIFS && KEYS
Wang Lei1a4240f2010-08-04 15:16:33 +0100[diff] [blame]131 select DNS_RESOLVER
Steve French10e70af2009-02-22 01:33:07 +0000[diff] [blame]132 help
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.
140
Suresh Jayaraman3feb41c2010-07-05 18:11:33 +0530[diff] [blame]141config CIFS_FSCACHE
142 bool "Provide CIFS client caching support (EXPERIMENTAL)"
143 depends on EXPERIMENTAL
144 depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
145 help
146 Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
147 to be cached locally on disk through the general filesystem cache
148 manager. If unsure, say N.
149
Shirish Pargaonkarfbeba8b2010-11-27 11:37:54 -0600[diff] [blame]150config CIFS_ACL
151 bool "Provide CIFS ACL support (EXPERIMENTAL)"
152 depends on EXPERIMENTAL && CIFS_XATTR
153 help
154 Allows to fetch CIFS/NTFS ACL from the server. The DACL blob
155 is handed over to the application/caller.
156
Shirish Pargaonkar25720872011-02-25 10:48:55 -0600[diff] [blame]157config CIFS_NFSD_EXPORT
158 bool "Allow nfsd to export CIFS file system (EXPERIMENTAL)"
Alexey Dobriyanbb26b962008-10-18 20:28:49 -0700[diff] [blame]159 depends on CIFS && EXPERIMENTAL
160 help
Shirish Pargaonkar25720872011-02-25 10:48:55 -0600[diff] [blame]161 Allows NFS server to export a CIFS mounted share (nfsd over cifs)