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1config NFS_FS
2 tristate "NFS client support"
2813893f 3 depends on INET && FILE_LOCKING && MULTIUSER
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4 select LOCKD
5 select SUNRPC
6 select NFS_ACL_SUPPORT if NFS_V3_ACL
7 help
8 Choose Y here if you want to access files residing on other
9 computers using Sun's Network File System protocol. To compile
10 this file system support as a module, choose M here: the module
11 will be called nfs.
12
13 To mount file systems exported by NFS servers, you also need to
14 install the user space mount.nfs command which can be found in
15 the Linux nfs-utils package, available from http://linux-nfs.org/.
16 Information about using the mount command is available in the
17 mount(8) man page. More detail about the Linux NFS client
18 implementation is available via the nfs(5) man page.
19
20 Below you can choose which versions of the NFS protocol are
21 available in the kernel to mount NFS servers. Support for NFS
22 version 2 (RFC 1094) is always available when NFS_FS is selected.
23
24 To configure a system which mounts its root file system via NFS
25 at boot time, say Y here, select "Kernel level IP
26 autoconfiguration" in the NETWORK menu, and select "Root file
27 system on NFS" below. You cannot compile this file system as a
28 module in this case.
29
30 If unsure, say N.
31
2ba68002 32config NFS_V2
ddda8e0a 33 tristate "NFS client support for NFS version 2"
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34 depends on NFS_FS
35 default y
36 help
37 This option enables support for version 2 of the NFS protocol
38 (RFC 1094) in the kernel's NFS client.
39
40 If unsure, say Y.
41
97afe47a 42config NFS_V3
1c606fb7 43 tristate "NFS client support for NFS version 3"
97afe47a 44 depends on NFS_FS
981f9fac 45 default y
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46 help
47 This option enables support for version 3 of the NFS protocol
48 (RFC 1813) in the kernel's NFS client.
49
50 If unsure, say Y.
51
52config NFS_V3_ACL
53 bool "NFS client support for the NFSv3 ACL protocol extension"
54 depends on NFS_V3
55 help
56 Some NFS servers support an auxiliary NFSv3 ACL protocol that
57 Sun added to Solaris but never became an official part of the
58 NFS version 3 protocol. This protocol extension allows
59 applications on NFS clients to manipulate POSIX Access Control
60 Lists on files residing on NFS servers. NFS servers enforce
61 ACLs on local files whether this protocol is available or not.
62
63 Choose Y here if your NFS server supports the Solaris NFSv3 ACL
64 protocol extension and you want your NFS client to allow
65 applications to access and modify ACLs on files on the server.
66
67 Most NFS servers don't support the Solaris NFSv3 ACL protocol
68 extension. You can choose N here or specify the "noacl" mount
69 option to prevent your NFS client from trying to use the NFSv3
70 ACL protocol.
71
72 If unsure, say N.
73
74config NFS_V4
89d77c8f 75 tristate "NFS client support for NFS version 4"
b3edc2bc 76 depends on NFS_FS
827e3457 77 select SUNRPC_GSS
e3da8706 78 select KEYS
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79 help
80 This option enables support for version 4 of the NFS protocol
81 (RFC 3530) in the kernel's NFS client.
82
83 To mount NFS servers using NFSv4, you also need to install user
84 space programs which can be found in the Linux nfs-utils package,
85 available from http://linux-nfs.org/.
86
b3edc2bc 87 If unsure, say Y.
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88
89config NFS_SWAP
90 bool "Provide swap over NFS support"
91 default n
92 depends on NFS_FS
93 select SUNRPC_SWAP
94 help
95 This option enables swapon to work on files located on NFS mounts.
97afe47a 96
1efae381 97config NFS_V4_1
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98 bool "NFS client support for NFSv4.1"
99 depends on NFS_V4
9e00abc3 100 select SUNRPC_BACKCHANNEL
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101 help
102 This option enables support for minor version 1 of the NFSv4 protocol
54a33b19 103 (RFC 5661) in the kernel's NFS client.
1efae381 104
3dce9a5c 105 If unsure, say N.
1efae381 106
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107config NFS_V4_2
108 bool "NFS client support for NFSv4.2"
109 depends on NFS_V4_1
110 help
111 This option enables support for minor version 2 of the NFSv4 protocol
112 in the kernel's NFS client.
113
114 If unsure, say N.
115
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116config PNFS_FILE_LAYOUT
117 tristate
e3074507 118 depends on NFS_V4_1
8c2fabc6 119 default NFS_V4
02c35fca 120
155e7524 121config PNFS_BLOCK
8cf1fb21 122 tristate
e3074507 123 depends on NFS_V4_1 && BLK_DEV_DM
8c2fabc6 124 default NFS_V4
155e7524 125
c93407d0 126config PNFS_OBJLAYOUT
8cf1fb21 127 tristate
e3074507 128 depends on NFS_V4_1 && SCSI_OSD_ULD
8c2fabc6 129 default NFS_V4
c93407d0 130
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131config PNFS_FLEXFILE_LAYOUT
132 tristate
133 depends on NFS_V4_1 && NFS_V3
134 default m
135
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136config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
137 string "NFSv4.1 Implementation ID Domain"
138 depends on NFS_V4_1
139 default "kernel.org"
140 help
141 This option defines the domain portion of the implementation ID that
142 may be sent in the NFS exchange_id operation. The value must be in
143 the format of a DNS domain name and should be set to the DNS domain
144 name of the distribution.
145 If the NFS client is unchanged from the upstream kernel, this
146 option should be set to the default "kernel.org".
147
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148config NFS_V4_1_MIGRATION
149 bool "NFSv4.1 client support for migration"
150 depends on NFS_V4_1
151 default n
152 help
153 This option makes the NFS client advertise to NFSv4.1 servers that
154 it can support NFSv4 migration.
155
156 The NFSv4.1 pieces of the Linux NFSv4 migration implementation are
157 still experimental. If you are not an NFSv4 developer, say N here.
158
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159config NFS_V4_SECURITY_LABEL
160 bool
161 depends on NFS_V4_2 && SECURITY
162 default y
163
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164config ROOT_NFS
165 bool "Root file system on NFS"
166 depends on NFS_FS=y && IP_PNP
167 help
168 If you want your system to mount its root file system via NFS,
169 choose Y here. This is common practice for managing systems
170 without local permanent storage. For details, read
dc7a0816 171 <file:Documentation/filesystems/nfs/nfsroot.txt>.
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172
173 Most people say N here.
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174
175config NFS_FSCACHE
4912002f 176 bool "Provide NFS client caching support"
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177 depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
178 help
179 Say Y here if you want NFS data to be cached locally on disc through
180 the general filesystem cache manager
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181
182config NFS_USE_LEGACY_DNS
183 bool "Use the legacy NFS DNS resolver"
184 depends on NFS_V4
185 help
186 The kernel now provides a method for translating a host name into an
187 IP address. Select Y here if you would rather use your own DNS
188 resolver script.
189
190 If unsure, say N
191
192config NFS_USE_KERNEL_DNS
193 bool
194 depends on NFS_V4 && !NFS_USE_LEGACY_DNS
195 select DNS_RESOLVER
196 default y
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197
198config NFS_DEBUG
199 bool
200 depends on NFS_FS && SUNRPC_DEBUG
201 select CRC32
202 default y