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Alexey Dobriyan97afe472009-01-22 11:07:41 +03001config NFS_FS
2 tristate "NFS client support"
Randy Dunlapdd4dc822009-05-12 13:28:09 -07003 depends on INET && FILE_LOCKING
Alexey Dobriyan97afe472009-01-22 11:07:41 +03004 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
32config NFS_V3
33 bool "NFS client support for NFS version 3"
34 depends on NFS_FS
35 help
36 This option enables support for version 3 of the NFS protocol
37 (RFC 1813) in the kernel's NFS client.
38
39 If unsure, say Y.
40
41config NFS_V3_ACL
42 bool "NFS client support for the NFSv3 ACL protocol extension"
43 depends on NFS_V3
44 help
45 Some NFS servers support an auxiliary NFSv3 ACL protocol that
46 Sun added to Solaris but never became an official part of the
47 NFS version 3 protocol. This protocol extension allows
48 applications on NFS clients to manipulate POSIX Access Control
49 Lists on files residing on NFS servers. NFS servers enforce
50 ACLs on local files whether this protocol is available or not.
51
52 Choose Y here if your NFS server supports the Solaris NFSv3 ACL
53 protocol extension and you want your NFS client to allow
54 applications to access and modify ACLs on files on the server.
55
56 Most NFS servers don't support the Solaris NFSv3 ACL protocol
57 extension. You can choose N here or specify the "noacl" mount
58 option to prevent your NFS client from trying to use the NFSv3
59 ACL protocol.
60
61 If unsure, say N.
62
63config NFS_V4
Trond Myklebustb3edc2b2010-08-04 14:38:01 -040064 bool "NFS client support for NFS version 4"
65 depends on NFS_FS
Trond Myklebust827e3452010-09-12 19:57:50 -040066 select SUNRPC_GSS
Alexey Dobriyan97afe472009-01-22 11:07:41 +030067 help
68 This option enables support for version 4 of the NFS protocol
69 (RFC 3530) in the kernel's NFS client.
70
71 To mount NFS servers using NFSv4, you also need to install user
72 space programs which can be found in the Linux nfs-utils package,
73 available from http://linux-nfs.org/.
74
Trond Myklebustb3edc2b2010-08-04 14:38:01 -040075 If unsure, say Y.
Alexey Dobriyan97afe472009-01-22 11:07:41 +030076
Ricardo Labiaga1efae382009-04-01 09:21:46 -040077config NFS_V4_1
Trond Myklebust3dce9a52010-08-04 14:39:16 -040078 bool "NFS client support for NFSv4.1 (EXPERIMENTAL)"
Fred Isaman02c35fc2010-10-20 00:17:59 -040079 depends on NFS_FS && NFS_V4 && EXPERIMENTAL
80 select PNFS_FILE_LAYOUT
Ricardo Labiaga1efae382009-04-01 09:21:46 -040081 help
82 This option enables support for minor version 1 of the NFSv4 protocol
Fred Isaman02c35fc2010-10-20 00:17:59 -040083 (RFC 5661) in the kernel's NFS client.
Ricardo Labiaga1efae382009-04-01 09:21:46 -040084
Trond Myklebust3dce9a52010-08-04 14:39:16 -040085 If unsure, say N.
Ricardo Labiaga1efae382009-04-01 09:21:46 -040086
Fred Isaman02c35fc2010-10-20 00:17:59 -040087config PNFS_FILE_LAYOUT
88 tristate
89
Alexey Dobriyan97afe472009-01-22 11:07:41 +030090config ROOT_NFS
91 bool "Root file system on NFS"
92 depends on NFS_FS=y && IP_PNP
93 help
94 If you want your system to mount its root file system via NFS,
95 choose Y here. This is common practice for managing systems
96 without local permanent storage. For details, read
J. Bruce Fieldsdc7a0812009-10-27 14:41:35 -040097 <file:Documentation/filesystems/nfs/nfsroot.txt>.
Alexey Dobriyan97afe472009-01-22 11:07:41 +030098
99 Most people say N here.
David Howells3b9ce972009-04-03 16:42:42 +0100100
101config NFS_FSCACHE
Christian Kujau49120022010-02-26 17:25:14 +0000102 bool "Provide NFS client caching support"
David Howells3b9ce972009-04-03 16:42:42 +0100103 depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
104 help
105 Say Y here if you want NFS data to be cached locally on disc through
106 the general filesystem cache manager
Bryan Schumakerc2e81392010-08-11 09:37:53 +0100107
108config NFS_USE_LEGACY_DNS
109 bool "Use the legacy NFS DNS resolver"
110 depends on NFS_V4
111 help
112 The kernel now provides a method for translating a host name into an
113 IP address. Select Y here if you would rather use your own DNS
114 resolver script.
115
116 If unsure, say N
117
118config NFS_USE_KERNEL_DNS
119 bool
120 depends on NFS_V4 && !NFS_USE_LEGACY_DNS
121 select DNS_RESOLVER
Steve French3f432312010-08-12 18:16:45 +0000122 select KEYS
Bryan Schumakerc2e81392010-08-11 09:37:53 +0100123 default y
Bryan Schumaker955a8572010-09-29 15:41:49 -0400124
125config NFS_USE_NEW_IDMAPPER
126 bool "Use the new idmapper upcall routine"
127 depends on NFS_V4 && KEYS
128 help
129 Say Y here if you want NFS to use the new idmapper upcall functions.
130 You will need /sbin/request-key (usually provided by the keyutils
131 package). For details, read
132 <file:Documentation/filesystems/nfs/idmapper.txt>.
133
134 If you are unsure, say N.