1 # SPDX-License-Identifier: GPL-2.0-only
2 config NFS_FS
3 tristate "NFS client support"
4 depends on INET && FILE_LOCKING && MUL
5 select LOCKD
6 select SUNRPC
7 select NFS_COMMON
8 select NFS_ACL_SUPPORT if NFS_V3_ACL
9 help
10 Choose Y here if you want to access
11 computers using Sun's Network File S
12 this file system support as a module
13 will be called nfs.
14
15 To mount file systems exported by NF
16 install the user space mount.nfs com
17 the Linux nfs-utils package, availab
18 Information about using the mount co
19 mount(8) man page. More detail abou
20 implementation is available via the
21
22 Below you can choose which versions
23 available in the kernel to mount NFS
24 version 2 (RFC 1094) is always avail
25
26 To configure a system which mounts i
27 at boot time, say Y here, select "Ke
28 autoconfiguration" in the NETWORK me
29 system on NFS" below. You cannot co
30 module in this case.
31
32 If unsure, say N.
33
34 config NFS_V2
35 tristate "NFS client support for NFS v
36 depends on NFS_FS
37 default n
38 help
39 This option enables support for vers
40 (RFC 1094) in the kernel's NFS clien
41
42 If unsure, say N.
43
44 config NFS_V3
45 tristate "NFS client support for NFS v
46 depends on NFS_FS
47 default y
48 help
49 This option enables support for vers
50 (RFC 1813) in the kernel's NFS clien
51
52 If unsure, say Y.
53
54 config NFS_V3_ACL
55 bool "NFS client support for the NFSv3
56 depends on NFS_V3
57 help
58 Some NFS servers support an auxiliar
59 Sun added to Solaris but never becam
60 NFS version 3 protocol. This protoc
61 applications on NFS clients to manip
62 Lists on files residing on NFS serve
63 ACLs on local files whether this pro
64
65 Choose Y here if your NFS server sup
66 protocol extension and you want your
67 applications to access and modify AC
68
69 Most NFS servers don't support the S
70 extension. You can choose N here or
71 option to prevent your NFS client fr
72 ACL protocol.
73
74 If unsure, say N.
75
76 config NFS_V4
77 tristate "NFS client support for NFS v
78 depends on NFS_FS
79 select KEYS
80 help
81 This option enables support for vers
82 (RFC 3530) in the kernel's NFS clien
83
84 To mount NFS servers using NFSv4, yo
85 space programs which can be found in
86 available from http://linux-nfs.org/
87
88 If unsure, say Y.
89
90 config NFS_SWAP
91 bool "Provide swap over NFS support"
92 default n
93 depends on NFS_FS && SWAP
94 select SUNRPC_SWAP
95 help
96 This option enables swapon to work o
97
98 config NFS_V4_1
99 bool "NFS client support for NFSv4.1"
100 depends on NFS_V4
101 select SUNRPC_BACKCHANNEL
102 help
103 This option enables support for mino
104 (RFC 5661) in the kernel's NFS clien
105
106 If unsure, say N.
107
108 config NFS_V4_2
109 bool "NFS client support for NFSv4.2"
110 depends on NFS_V4_1
111 help
112 This option enables support for mino
113 in the kernel's NFS client.
114
115 If unsure, say N.
116
117 config PNFS_FILE_LAYOUT
118 tristate
119 depends on NFS_V4_1
120 default NFS_V4
121
122 config PNFS_BLOCK
123 tristate
124 depends on NFS_V4_1 && BLK_DEV_DM
125 default NFS_V4
126
127 config PNFS_FLEXFILE_LAYOUT
128 tristate
129 depends on NFS_V4_1
130 default NFS_V4
131
132 config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
133 string "NFSv4.1 Implementation ID Doma
134 depends on NFS_V4_1
135 default "kernel.org"
136 help
137 This option defines the domain porti
138 may be sent in the NFS exchange_id o
139 the format of a DNS domain name and
140 name of the distribution.
141 If the NFS client is unchanged from
142 option should be set to the default
143
144 config NFS_V4_1_MIGRATION
145 bool "NFSv4.1 client support for migra
146 depends on NFS_V4_1
147 default n
148 help
149 This option makes the NFS client adv
150 it can support NFSv4 migration.
151
152 The NFSv4.1 pieces of the Linux NFSv
153 still experimental. If you are not
154
155 config NFS_V4_SECURITY_LABEL
156 bool
157 depends on NFS_V4_2 && SECURITY
158 default y
159
160 config ROOT_NFS
161 bool "Root file system on NFS"
162 depends on NFS_FS=y && IP_PNP
163 help
164 If you want your system to mount its
165 choose Y here. This is common pract
166 without local permanent storage. Fo
167 <file:Documentation/admin-guide/nfs/
168
169 Most people say N here.
170
171 config NFS_FSCACHE
172 bool "Provide NFS client caching suppo
173 depends on NFS_FS=m && NETFS_SUPPORT |
174 select FSCACHE
175 help
176 Say Y here if you want NFS data to b
177 the general filesystem cache manager
178
179 config NFS_USE_LEGACY_DNS
180 bool "Use the legacy NFS DNS resolver"
181 depends on NFS_V4
182 help
183 The kernel now provides a method for
184 IP address. Select Y here if you wo
185 resolver script.
186
187 If unsure, say N
188
189 config NFS_USE_KERNEL_DNS
190 bool
191 depends on NFS_V4 && !NFS_USE_LEGACY_D
192 select DNS_RESOLVER
193 default y
194
195 config NFS_DEBUG
196 bool
197 depends on NFS_FS && SUNRPC_DEBUG
198 select CRC32
199 default y
200
201 config NFS_DISABLE_UDP_SUPPORT
202 bool "NFS: Disable NFS UDP protocol sup
203 depends on NFS_FS
204 default y
205 help
206 Choose Y here to disable the use of N
207 on modern networks (1Gb+) can lead to
208 fragmentation during high loads.
209
210 config NFS_V4_2_READ_PLUS
211 bool "NFS: Enable support for the NFSv
212 depends on NFS_V4_2
213 default y
214 help
215 Choose Y here to enable use of the NF
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