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1 | config CIFS |
2 | tristate "CIFS support (advanced network filesystem, SMBFS successor)" | |
3 | depends on INET | |
4 | select NLS | |
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5 | select CRYPTO |
6 | select CRYPTO_MD5 | |
7 | select CRYPTO_ARC4 | |
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8 | help |
9 | This is the client VFS module for the Common Internet File System | |
10 | (CIFS) protocol which is the successor to the Server Message Block | |
11 | (SMB) protocol, the native file sharing mechanism for most early | |
12 | PC operating systems. The CIFS protocol is fully supported by | |
13 | file servers such as Windows 2000 (including Windows 2003, NT 4 | |
14 | and Windows XP) as well by Samba (which provides excellent CIFS | |
15 | server support for Linux and many other operating systems). Limited | |
16 | support for OS/2 and Windows ME and similar servers is provided as | |
17 | well. | |
18 | ||
19 | The cifs module provides an advanced network file system | |
20 | client for mounting to CIFS compliant servers. It includes | |
21 | support for DFS (hierarchical name space), secure per-user | |
22 | session establishment via Kerberos or NTLM or NTLMv2, | |
23 | safe distributed caching (oplock), optional packet | |
24 | signing, Unicode and other internationalization improvements. | |
25 | If you need to mount to Samba or Windows from this machine, say Y. | |
26 | ||
27 | config CIFS_STATS | |
28 | bool "CIFS statistics" | |
29 | depends on CIFS | |
30 | help | |
31 | Enabling this option will cause statistics for each server share | |
32 | mounted by the cifs client to be displayed in /proc/fs/cifs/Stats | |
33 | ||
34 | config CIFS_STATS2 | |
35 | bool "Extended statistics" | |
36 | depends on CIFS_STATS | |
37 | help | |
38 | Enabling this option will allow more detailed statistics on SMB | |
39 | request timing to be displayed in /proc/fs/cifs/DebugData and also | |
40 | allow optional logging of slow responses to dmesg (depending on the | |
41 | value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details). | |
42 | These additional statistics may have a minor effect on performance | |
43 | and memory utilization. | |
44 | ||
45 | Unless you are a developer or are doing network performance analysis | |
46 | or tuning, say N. | |
47 | ||
48 | config CIFS_WEAK_PW_HASH | |
49 | bool "Support legacy servers which use weaker LANMAN security" | |
50 | depends on CIFS | |
51 | help | |
52 | Modern CIFS servers including Samba and most Windows versions | |
53 | (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos) | |
54 | security mechanisms. These hash the password more securely | |
55 | than the mechanisms used in the older LANMAN version of the | |
56 | SMB protocol but LANMAN based authentication is needed to | |
57 | establish sessions with some old SMB servers. | |
58 | ||
59 | Enabling this option allows the cifs module to mount to older | |
60 | LANMAN based servers such as OS/2 and Windows 95, but such | |
61 | mounts may be less secure than mounts using NTLM or more recent | |
62 | security mechanisms if you are on a public network. Unless you | |
63 | have a need to access old SMB servers (and are on a private | |
64 | network) you probably want to say N. Even if this support | |
65 | is enabled in the kernel build, LANMAN authentication will not be | |
66 | used automatically. At runtime LANMAN mounts are disabled but | |
67 | can be set to required (or optional) either in | |
68 | /proc/fs/cifs (see fs/cifs/README for more detail) or via an | |
69 | option on the mount command. This support is disabled by | |
70 | default in order to reduce the possibility of a downgrade | |
71 | attack. | |
72 | ||
73 | If unsure, say N. | |
74 | ||
75 | config CIFS_UPCALL | |
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76 | bool "Kerberos/SPNEGO advanced session setup" |
77 | depends on CIFS && KEYS | |
78 | select DNS_RESOLVER | |
79 | help | |
80 | Enables an upcall mechanism for CIFS which accesses userspace helper | |
81 | utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets | |
82 | which are needed to mount to certain secure servers (for which more | |
83 | secure Kerberos authentication is required). If unsure, say N. | |
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84 | |
85 | config CIFS_XATTR | |
86 | bool "CIFS extended attributes" | |
87 | depends on CIFS | |
88 | help | |
89 | Extended attributes are name:value pairs associated with inodes by | |
90 | the kernel or by users (see the attr(5) manual page, or visit | |
91 | <http://acl.bestbits.at/> for details). CIFS maps the name of | |
92 | extended attributes beginning with the user namespace prefix | |
93 | to SMB/CIFS EAs. EAs are stored on Windows servers without the | |
94 | user namespace prefix, but their names are seen by Linux cifs clients | |
95 | prefaced by the user namespace prefix. The system namespace | |
96 | (used by some filesystems to store ACLs) is not supported at | |
97 | this time. | |
98 | ||
99 | If unsure, say N. | |
100 | ||
101 | config CIFS_POSIX | |
102 | bool "CIFS POSIX Extensions" | |
103 | depends on CIFS_XATTR | |
104 | help | |
105 | Enabling this option will cause the cifs client to attempt to | |
106 | negotiate a newer dialect with servers, such as Samba 3.0.5 | |
107 | or later, that optionally can handle more POSIX like (rather | |
108 | than Windows like) file behavior. It also enables | |
109 | support for POSIX ACLs (getfacl and setfacl) to servers | |
110 | (such as Samba 3.10 and later) which can negotiate | |
111 | CIFS POSIX ACL support. If unsure, say N. | |
112 | ||
113 | config CIFS_DEBUG2 | |
114 | bool "Enable additional CIFS debugging routines" | |
115 | depends on CIFS | |
116 | help | |
117 | Enabling this option adds a few more debugging routines | |
118 | to the cifs code which slightly increases the size of | |
119 | the cifs module and can cause additional logging of debug | |
120 | messages in some error paths, slowing performance. This | |
121 | option can be turned off unless you are debugging | |
122 | cifs problems. If unsure, say N. | |
123 | ||
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124 | config CIFS_DFS_UPCALL |
125 | bool "DFS feature support" | |
126 | depends on CIFS && KEYS | |
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128 | help |
129 | Distributed File System (DFS) support is used to access shares | |
130 | transparently in an enterprise name space, even if the share | |
131 | moves to a different server. This feature also enables | |
132 | an upcall mechanism for CIFS which contacts userspace helper | |
133 | utilities to provide server name resolution (host names to | |
134 | IP addresses) which is needed for implicit mounts of DFS junction | |
135 | points. If unsure, say N. | |
136 | ||
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137 | config CIFS_FSCACHE |
138 | bool "Provide CIFS client caching support (EXPERIMENTAL)" | |
139 | depends on EXPERIMENTAL | |
140 | depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y | |
141 | help | |
142 | Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data | |
143 | to be cached locally on disk through the general filesystem cache | |
144 | manager. If unsure, say N. | |
145 | ||
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146 | config CIFS_EXPERIMENTAL |
147 | bool "CIFS Experimental Features (EXPERIMENTAL)" | |
148 | depends on CIFS && EXPERIMENTAL | |
149 | help | |
150 | Enables cifs features under testing. These features are | |
151 | experimental and currently include DFS support and directory | |
152 | change notification ie fcntl(F_DNOTIFY), as well as the upcall | |
153 | mechanism which will be used for Kerberos session negotiation | |
154 | and uid remapping. Some of these features also may depend on | |
155 | setting a value of 1 to the pseudo-file /proc/fs/cifs/Experimental | |
156 | (which is disabled by default). See the file fs/cifs/README | |
157 | for more details. If unsure, say N. | |
158 |