Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1# SPDX-License-Identifier: GPL-2.0-only
2config NFSD
3 tristate "NFS server support"
4 depends on INET
5 depends on FILE_LOCKING
6 depends on FSNOTIFY
7 select LOCKD
8 select SUNRPC
9 select EXPORTFS
10 select NFS_ACL_SUPPORT if NFSD_V2_ACL
11 depends on MULTIUSER
12 help
13 Choose Y here if you want to allow other computers to access
14 files residing on this system using Sun's Network File System
15 protocol. To compile the NFS server support as a module,
16 choose M here: the module will be called nfsd.
17
18 You may choose to use a user-space NFS server instead, in which
19 case you can choose N here.
20
21 To export local file systems using NFS, you also need to install
22 user space programs which can be found in the Linux nfs-utils
23 package, available from http://linux-nfs.org/. More detail about
24 the Linux NFS server implementation is available via the
25 exports(5) man page.
26
27 Below you can choose which versions of the NFS protocol are
28 available to clients mounting the NFS server on this system.
29 Support for NFS version 2 (RFC 1094) is always available when
30 CONFIG_NFSD is selected.
31
32 If unsure, say N.
33
34config NFSD_V2_ACL
35 bool
36 depends on NFSD
37
38config NFSD_V3_ACL
39 bool "NFS server support for the NFSv3 ACL protocol extension"
40 depends on NFSD
41 select NFSD_V2_ACL
42 help
43 Solaris NFS servers support an auxiliary NFSv3 ACL protocol that
44 never became an official part of the NFS version 3 protocol.
45 This protocol extension allows applications on NFS clients to
46 manipulate POSIX Access Control Lists on files residing on NFS
47 servers. NFS servers enforce POSIX ACLs on local files whether
48 this protocol is available or not.
49
50 This option enables support in your system's NFS server for the
51 NFSv3 ACL protocol extension allowing NFS clients to manipulate
52 POSIX ACLs on files exported by your system's NFS server. NFS
53 clients which support the Solaris NFSv3 ACL protocol can then
54 access and modify ACLs on your NFS server.
55
56 To store ACLs on your NFS server, you also need to enable ACL-
57 related CONFIG options for your local file systems of choice.
58
59 If unsure, say N.
60
61config NFSD_V4
62 bool "NFS server support for NFS version 4"
63 depends on NFSD && PROC_FS
64 select FS_POSIX_ACL
65 select SUNRPC_GSS
66 select CRYPTO
67 select CRYPTO_MD5
68 select CRYPTO_SHA256
69 select GRACE_PERIOD
70 select NFS_V4_2_SSC_HELPER if NFS_V4_2
71 help
72 This option enables support in your system's NFS server for
73 version 4 of the NFS protocol (RFC 3530).
74
75 To export files using NFSv4, you need to install additional user
76 space programs which can be found in the Linux nfs-utils package,
77 available from http://linux-nfs.org/.
78
79 If unsure, say N.
80
81config NFSD_PNFS
82 bool
83
84config NFSD_BLOCKLAYOUT
85 bool "NFSv4.1 server support for pNFS block layouts"
86 depends on NFSD_V4 && BLOCK
87 select NFSD_PNFS
88 select EXPORTFS_BLOCK_OPS
89 help
90 This option enables support for the exporting pNFS block layouts
91 in the kernel's NFS server. The pNFS block layout enables NFS
92 clients to directly perform I/O to block devices accessible to both
93 the server and the clients. See RFC 5663 for more details.
94
95 If unsure, say N.
96
97config NFSD_SCSILAYOUT
98 bool "NFSv4.1 server support for pNFS SCSI layouts"
99 depends on NFSD_V4 && BLOCK
100 select NFSD_PNFS
101 select EXPORTFS_BLOCK_OPS
102 help
103 This option enables support for the exporting pNFS SCSI layouts
104 in the kernel's NFS server. The pNFS SCSI layout enables NFS
105 clients to directly perform I/O to SCSI devices accessible to both
106 the server and the clients. See draft-ietf-nfsv4-scsi-layout for
107 more details.
108
109 If unsure, say N.
110
111config NFSD_FLEXFILELAYOUT
112 bool "NFSv4.1 server support for pNFS Flex File layouts"
113 depends on NFSD_V4
114 select NFSD_PNFS
115 help
116 This option enables support for the exporting pNFS Flex File
117 layouts in the kernel's NFS server. The pNFS Flex File layout
118 enables NFS clients to directly perform I/O to NFSv3 devices
119 accessible to both the server and the clients. See
120 draft-ietf-nfsv4-flex-files for more details.
121
122 Warning, this server implements the bare minimum functionality
123 to be a flex file server - it is for testing the client,
124 not for use in production.
125
126 If unsure, say N.
127
128config NFSD_V4_2_INTER_SSC
129 bool "NFSv4.2 inter server to server COPY"
130 depends on NFSD_V4 && NFS_V4_2
131 help
132 This option enables support for NFSv4.2 inter server to
133 server copy where the destination server calls the NFSv4.2
134 client to read the data to copy from the source server.
135
136 If unsure, say N.
137
138config NFSD_V4_SECURITY_LABEL
139 bool "Provide Security Label support for NFSv4 server"
140 depends on NFSD_V4 && SECURITY
141 help
142
143 Say Y here if you want enable fine-grained security label attribute
144 support for NFS version 4. Security labels allow security modules like
145 SELinux and Smack to label files to facilitate enforcement of their policies.
146 Without this an NFSv4 mount will have the same label on each file.
147
148 If you do not wish to enable fine-grained security labels SELinux or
149 Smack policies on NFSv4 files, say N.