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
39	bool "NFS server support for NFS version 3"
40	depends on NFSD
41	help
42	  This option enables support in your system's NFS server for
43	  version 3 of the NFS protocol (RFC 1813).
44
45	  If unsure, say Y.
46
47config NFSD_V3_ACL
48	bool "NFS server support for the NFSv3 ACL protocol extension"
49	depends on NFSD_V3
50	select NFSD_V2_ACL
51	help
52	  Solaris NFS servers support an auxiliary NFSv3 ACL protocol that
53	  never became an official part of the NFS version 3 protocol.
54	  This protocol extension allows applications on NFS clients to
55	  manipulate POSIX Access Control Lists on files residing on NFS
56	  servers.  NFS servers enforce POSIX ACLs on local files whether
57	  this protocol is available or not.
58
59	  This option enables support in your system's NFS server for the
60	  NFSv3 ACL protocol extension allowing NFS clients to manipulate
61	  POSIX ACLs on files exported by your system's NFS server.  NFS
62	  clients which support the Solaris NFSv3 ACL protocol can then
63	  access and modify ACLs on your NFS server.
64
65	  To store ACLs on your NFS server, you also need to enable ACL-
66	  related CONFIG options for your local file systems of choice.
67
68	  If unsure, say N.
69
70config NFSD_V4
71	bool "NFS server support for NFS version 4"
72	depends on NFSD && PROC_FS
73	select NFSD_V3
74	select FS_POSIX_ACL
75	select SUNRPC_GSS
76	select CRYPTO
77	select CRYPTO_MD5
78	select CRYPTO_SHA256
79	select GRACE_PERIOD
80	select NFS_V4_2_SSC_HELPER if NFS_V4_2
81	help
82	  This option enables support in your system's NFS server for
83	  version 4 of the NFS protocol (RFC 3530).
84
85	  To export files using NFSv4, you need to install additional user
86	  space programs which can be found in the Linux nfs-utils package,
87	  available from http://linux-nfs.org/.
88
89	  If unsure, say N.
90
91config NFSD_PNFS
92	bool
93
94config NFSD_BLOCKLAYOUT
95	bool "NFSv4.1 server support for pNFS block layouts"
96	depends on NFSD_V4 && BLOCK
97	select NFSD_PNFS
98	select EXPORTFS_BLOCK_OPS
99	help
100	  This option enables support for the exporting pNFS block layouts
101	  in the kernel's NFS server. The pNFS block layout enables NFS
102	  clients to directly perform I/O to block devices accessible to both
103	  the server and the clients.  See RFC 5663 for more details.
104
105	  If unsure, say N.
106
107config NFSD_SCSILAYOUT
108	bool "NFSv4.1 server support for pNFS SCSI layouts"
109	depends on NFSD_V4 && BLOCK
110	select NFSD_PNFS
111	select EXPORTFS_BLOCK_OPS
112	help
113	  This option enables support for the exporting pNFS SCSI layouts
114	  in the kernel's NFS server. The pNFS SCSI layout enables NFS
115	  clients to directly perform I/O to SCSI devices accessible to both
116	  the server and the clients.  See draft-ietf-nfsv4-scsi-layout for
117	  more details.
118
119	  If unsure, say N.
120
121config NFSD_FLEXFILELAYOUT
122	bool "NFSv4.1 server support for pNFS Flex File layouts"
123	depends on NFSD_V4
124	select NFSD_PNFS
125	help
126	  This option enables support for the exporting pNFS Flex File
127	  layouts in the kernel's NFS server. The pNFS Flex File  layout
128	  enables NFS clients to directly perform I/O to NFSv3 devices
129	  accessible to both the server and the clients.  See
130	  draft-ietf-nfsv4-flex-files for more details.
131
132	  Warning, this server implements the bare minimum functionality
133	  to be a flex file server - it is for testing the client,
134	  not for use in production.
135
136	  If unsure, say N.
137
138config NFSD_V4_2_INTER_SSC
139	bool "NFSv4.2 inter server to server COPY"
140	depends on NFSD_V4 && NFS_V4_2
141	help
142	  This option enables support for NFSv4.2 inter server to
143	  server copy where the destination server calls the NFSv4.2
144	  client to read the data to copy from the source server.
145
146	  If unsure, say N.
147
148config NFSD_V4_SECURITY_LABEL
149	bool "Provide Security Label support for NFSv4 server"
150	depends on NFSD_V4 && SECURITY
151	help
152
153	Say Y here if you want enable fine-grained security label attribute
154	support for NFS version 4.  Security labels allow security modules like
155	SELinux and Smack to label files to facilitate enforcement of their policies.
156	Without this an NFSv4 mount will have the same label on each file.
157
158	If you do not wish to enable fine-grained security labels SELinux or
159	Smack policies on NFSv4 files, say N.
160