1 # SPDX-License-Identifier: GPL-2.0-only <<
2 config NFS_FS 1 config NFS_FS
3 tristate "NFS client support" 2 tristate "NFS client support"
4 depends on INET && FILE_LOCKING && MUL !! 3 depends on INET && FILE_LOCKING
5 select LOCKD 4 select LOCKD
6 select SUNRPC 5 select SUNRPC
7 select NFS_COMMON <<
8 select NFS_ACL_SUPPORT if NFS_V3_ACL 6 select NFS_ACL_SUPPORT if NFS_V3_ACL
9 help 7 help
10 Choose Y here if you want to access 8 Choose Y here if you want to access files residing on other
11 computers using Sun's Network File S 9 computers using Sun's Network File System protocol. To compile
12 this file system support as a module 10 this file system support as a module, choose M here: the module
13 will be called nfs. 11 will be called nfs.
14 12
15 To mount file systems exported by NF 13 To mount file systems exported by NFS servers, you also need to
16 install the user space mount.nfs com 14 install the user space mount.nfs command which can be found in
17 the Linux nfs-utils package, availab 15 the Linux nfs-utils package, available from http://linux-nfs.org/.
18 Information about using the mount co 16 Information about using the mount command is available in the
19 mount(8) man page. More detail abou 17 mount(8) man page. More detail about the Linux NFS client
20 implementation is available via the 18 implementation is available via the nfs(5) man page.
21 19
22 Below you can choose which versions 20 Below you can choose which versions of the NFS protocol are
23 available in the kernel to mount NFS 21 available in the kernel to mount NFS servers. Support for NFS
24 version 2 (RFC 1094) is always avail 22 version 2 (RFC 1094) is always available when NFS_FS is selected.
25 23
26 To configure a system which mounts i 24 To configure a system which mounts its root file system via NFS
27 at boot time, say Y here, select "Ke 25 at boot time, say Y here, select "Kernel level IP
28 autoconfiguration" in the NETWORK me 26 autoconfiguration" in the NETWORK menu, and select "Root file
29 system on NFS" below. You cannot co 27 system on NFS" below. You cannot compile this file system as a
30 module in this case. 28 module in this case.
31 29
32 If unsure, say N. 30 If unsure, say N.
33 31
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 32 config NFS_V3
45 tristate "NFS client support for NFS v !! 33 bool "NFS client support for NFS version 3"
46 depends on NFS_FS 34 depends on NFS_FS
47 default y <<
48 help 35 help
49 This option enables support for vers 36 This option enables support for version 3 of the NFS protocol
50 (RFC 1813) in the kernel's NFS clien 37 (RFC 1813) in the kernel's NFS client.
51 38
52 If unsure, say Y. 39 If unsure, say Y.
53 40
54 config NFS_V3_ACL 41 config NFS_V3_ACL
55 bool "NFS client support for the NFSv3 42 bool "NFS client support for the NFSv3 ACL protocol extension"
56 depends on NFS_V3 43 depends on NFS_V3
57 help 44 help
58 Some NFS servers support an auxiliar 45 Some NFS servers support an auxiliary NFSv3 ACL protocol that
59 Sun added to Solaris but never becam 46 Sun added to Solaris but never became an official part of the
60 NFS version 3 protocol. This protoc 47 NFS version 3 protocol. This protocol extension allows
61 applications on NFS clients to manip 48 applications on NFS clients to manipulate POSIX Access Control
62 Lists on files residing on NFS serve 49 Lists on files residing on NFS servers. NFS servers enforce
63 ACLs on local files whether this pro 50 ACLs on local files whether this protocol is available or not.
64 51
65 Choose Y here if your NFS server sup 52 Choose Y here if your NFS server supports the Solaris NFSv3 ACL
66 protocol extension and you want your 53 protocol extension and you want your NFS client to allow
67 applications to access and modify AC 54 applications to access and modify ACLs on files on the server.
68 55
69 Most NFS servers don't support the S 56 Most NFS servers don't support the Solaris NFSv3 ACL protocol
70 extension. You can choose N here or 57 extension. You can choose N here or specify the "noacl" mount
71 option to prevent your NFS client fr 58 option to prevent your NFS client from trying to use the NFSv3
72 ACL protocol. 59 ACL protocol.
73 60
74 If unsure, say N. 61 If unsure, say N.
75 62
76 config NFS_V4 63 config NFS_V4
77 tristate "NFS client support for NFS v !! 64 bool "NFS client support for NFS version 4 (EXPERIMENTAL)"
78 depends on NFS_FS !! 65 depends on NFS_FS && EXPERIMENTAL
79 select KEYS !! 66 select RPCSEC_GSS_KRB5
80 help 67 help
81 This option enables support for vers 68 This option enables support for version 4 of the NFS protocol
82 (RFC 3530) in the kernel's NFS clien 69 (RFC 3530) in the kernel's NFS client.
83 70
84 To mount NFS servers using NFSv4, yo 71 To mount NFS servers using NFSv4, you also need to install user
85 space programs which can be found in 72 space programs which can be found in the Linux nfs-utils package,
86 available from http://linux-nfs.org/ 73 available from http://linux-nfs.org/.
87 74
88 If unsure, say Y. !! 75 If unsure, say N.
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 76
98 config NFS_V4_1 77 config NFS_V4_1
99 bool "NFS client support for NFSv4.1" !! 78 bool "NFS client support for NFSv4.1 (DEVELOPER ONLY)"
100 depends on NFS_V4 !! 79 depends on NFS_V4 && EXPERIMENTAL
101 select SUNRPC_BACKCHANNEL <<
102 help 80 help
103 This option enables support for mino 81 This option enables support for minor version 1 of the NFSv4 protocol
104 (RFC 5661) in the kernel's NFS clien !! 82 (draft-ietf-nfsv4-minorversion1) in the kernel's NFS client.
105 83
106 If unsure, say N. !! 84 Unless you're an NFS developer, 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 85
160 config ROOT_NFS 86 config ROOT_NFS
161 bool "Root file system on NFS" 87 bool "Root file system on NFS"
162 depends on NFS_FS=y && IP_PNP 88 depends on NFS_FS=y && IP_PNP
163 help 89 help
164 If you want your system to mount its 90 If you want your system to mount its root file system via NFS,
165 choose Y here. This is common pract 91 choose Y here. This is common practice for managing systems
166 without local permanent storage. Fo 92 without local permanent storage. For details, read
167 <file:Documentation/admin-guide/nfs/ !! 93 <file:Documentation/filesystems/nfsroot.txt>.
168 94
169 Most people say N here. 95 Most people say N here.
170 96
171 config NFS_FSCACHE 97 config NFS_FSCACHE
172 bool "Provide NFS client caching suppo !! 98 bool "Provide NFS client caching support (EXPERIMENTAL)"
173 depends on NFS_FS=m && NETFS_SUPPORT | !! 99 depends on EXPERIMENTAL
174 select FSCACHE !! 100 depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
175 help 101 help
176 Say Y here if you want NFS data to b 102 Say Y here if you want NFS data to be cached locally on disc through
177 the general filesystem cache manager 103 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 <<
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.