Root/
1 | config CIFS |
2 | tristate "CIFS support (advanced network filesystem, SMBFS successor)" |
3 | depends on INET |
4 | select NLS |
5 | select CRYPTO |
6 | select CRYPTO_MD4 |
7 | select CRYPTO_MD5 |
8 | select CRYPTO_HMAC |
9 | select CRYPTO_ARC4 |
10 | select CRYPTO_ECB |
11 | select CRYPTO_DES |
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 | |
31 | config 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 | |
38 | config 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 | |
52 | config 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 | |
79 | config CIFS_UPCALL |
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. |
88 | |
89 | config 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 | |
105 | config 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 | |
117 | config 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 | |
128 | config CIFS_DFS_UPCALL |
129 | bool "DFS feature support" |
130 | depends on CIFS && KEYS |
131 | select DNS_RESOLVER |
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 | |
141 | config 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 | |
150 | config CIFS_ACL |
151 | bool "Provide CIFS ACL support (EXPERIMENTAL)" |
152 | depends on EXPERIMENTAL && CIFS_XATTR && KEYS |
153 | help |
154 | Allows to fetch CIFS/NTFS ACL from the server. The DACL blob |
155 | is handed over to the application/caller. |
156 | |
157 | config CIFS_NFSD_EXPORT |
158 | bool "Allow nfsd to export CIFS file system (EXPERIMENTAL)" |
159 | depends on CIFS && EXPERIMENTAL && BROKEN |
160 | help |
161 | Allows NFS server to export a CIFS mounted share (nfsd over cifs) |
162 |
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