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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
Trond Myklebuste3da8702012-02-08 13:21:38 -050067 select KEYS
Alexey Dobriyan97afe472009-01-22 11:07:41 +030068 help
69 This option enables support for version 4 of the NFS protocol
70 (RFC 3530) in the kernel's NFS client.
71
72 To mount NFS servers using NFSv4, you also need to install user
73 space programs which can be found in the Linux nfs-utils package,
74 available from http://linux-nfs.org/.
75
Trond Myklebustb3edc2b2010-08-04 14:38:01 -040076 If unsure, say Y.
Alexey Dobriyan97afe472009-01-22 11:07:41 +030077
Ricardo Labiaga1efae382009-04-01 09:21:46 -040078config NFS_V4_1
Trond Myklebust3dce9a52010-08-04 14:39:16 -040079 bool "NFS client support for NFSv4.1 (EXPERIMENTAL)"
Fred Isaman02c35fc2010-10-20 00:17:59 -040080 depends on NFS_FS && NFS_V4 && EXPERIMENTAL
Trond Myklebust9e00abc2011-07-13 19:20:49 -040081 select SUNRPC_BACKCHANNEL
Fred Isaman02c35fc2010-10-20 00:17:59 -040082 select PNFS_FILE_LAYOUT
Ricardo Labiaga1efae382009-04-01 09:21:46 -040083 help
84 This option enables support for minor version 1 of the NFSv4 protocol
Peng Tao54a33b192011-08-10 18:29:21 -040085 (RFC 5661) in the kernel's NFS client.
Ricardo Labiaga1efae382009-04-01 09:21:46 -040086
Trond Myklebust3dce9a52010-08-04 14:39:16 -040087 If unsure, say N.
Ricardo Labiaga1efae382009-04-01 09:21:46 -040088
Fred Isaman02c35fc2010-10-20 00:17:59 -040089config PNFS_FILE_LAYOUT
90 tristate
91
Fred Isaman155e7522011-07-30 20:52:39 -040092config PNFS_BLOCK
Boaz Harrosh8cf1fb2162011-08-11 14:29:25 -070093 tristate
Peng Tao54a33b192011-08-10 18:29:21 -040094 depends on NFS_FS && NFS_V4_1 && BLK_DEV_DM
Boaz Harrosh8cf1fb2162011-08-11 14:29:25 -070095 default m
Fred Isaman155e7522011-07-30 20:52:39 -040096
Benny Halevyc93407d2011-05-22 19:49:06 +030097config PNFS_OBJLAYOUT
Boaz Harrosh8cf1fb2162011-08-11 14:29:25 -070098 tristate
Benny Halevyc93407d2011-05-22 19:49:06 +030099 depends on NFS_FS && NFS_V4_1 && SCSI_OSD_ULD
Boaz Harrosh8cf1fb2162011-08-11 14:29:25 -0700100 default m
Benny Halevyc93407d2011-05-22 19:49:06 +0300101
Weston Andros Adamsondb8ac8b2012-02-17 15:20:24 -0500102config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
103 string "NFSv4.1 Implementation ID Domain"
104 depends on NFS_V4_1
105 default "kernel.org"
106 help
107 This option defines the domain portion of the implementation ID that
108 may be sent in the NFS exchange_id operation. The value must be in
109 the format of a DNS domain name and should be set to the DNS domain
110 name of the distribution.
111 If the NFS client is unchanged from the upstream kernel, this
112 option should be set to the default "kernel.org".
113
Alexey Dobriyan97afe472009-01-22 11:07:41 +0300114config ROOT_NFS
115 bool "Root file system on NFS"
116 depends on NFS_FS=y && IP_PNP
117 help
118 If you want your system to mount its root file system via NFS,
119 choose Y here. This is common practice for managing systems
120 without local permanent storage. For details, read
J. Bruce Fieldsdc7a0812009-10-27 14:41:35 -0400121 <file:Documentation/filesystems/nfs/nfsroot.txt>.
Alexey Dobriyan97afe472009-01-22 11:07:41 +0300122
123 Most people say N here.
David Howells3b9ce972009-04-03 16:42:42 +0100124
125config NFS_FSCACHE
Christian Kujau49120022010-02-26 17:25:14 +0000126 bool "Provide NFS client caching support"
David Howells3b9ce972009-04-03 16:42:42 +0100127 depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
128 help
129 Say Y here if you want NFS data to be cached locally on disc through
130 the general filesystem cache manager
Bryan Schumakerc2e81392010-08-11 09:37:53 +0100131
132config NFS_USE_LEGACY_DNS
133 bool "Use the legacy NFS DNS resolver"
134 depends on NFS_V4
135 help
136 The kernel now provides a method for translating a host name into an
137 IP address. Select Y here if you would rather use your own DNS
138 resolver script.
139
140 If unsure, say N
141
142config NFS_USE_KERNEL_DNS
143 bool
144 depends on NFS_V4 && !NFS_USE_LEGACY_DNS
145 select DNS_RESOLVER
146 default y