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	select NFS_ACL_SUPPORT if NFSD_V3_ACL
12	depends on MULTIUSER
13	help
14	  Choose Y here if you want to allow other computers to access
15	  files residing on this system using Sun's Network File System
16	  protocol.  To compile the NFS server support as a module,
17	  choose M here: the module will be called nfsd.
18
19	  You may choose to use a user-space NFS server instead, in which
20	  case you can choose N here.
21
22	  To export local file systems using NFS, you also need to install
23	  user space programs which can be found in the Linux nfs-utils
24	  package, available from http://linux-nfs.org/.  More detail about
25	  the Linux NFS server implementation is available via the
26	  exports(5) man page.
27
28	  Below you can choose which versions of the NFS protocol are
29	  available to clients mounting the NFS server on this system.
30	  Support for NFS version 3 (RFC 1813) is always available when
31	  CONFIG_NFSD is selected.
32
33	  If unsure, say N.
34
35config NFSD_V2
36	bool "NFS server support for NFS version 2 (DEPRECATED)"
37	depends on NFSD
38	default n
39	help
40	  NFSv2 (RFC 1094) was the first publicly-released version of NFS.
41	  Unless you are hosting ancient (1990's era) NFS clients, you don't
42	  need this.
43
44	  If unsure, say N.
45
46config NFSD_V2_ACL
47	bool "NFS server support for the NFSv2 ACL protocol extension"
48	depends on NFSD_V2
49
50config NFSD_V3_ACL
51	bool "NFS server support for the NFSv3 ACL protocol extension"
52	depends on NFSD
53	help
54	  Solaris NFS servers support an auxiliary NFSv3 ACL protocol that
55	  never became an official part of the NFS version 3 protocol.
56	  This protocol extension allows applications on NFS clients to
57	  manipulate POSIX Access Control Lists on files residing on NFS
58	  servers.  NFS servers enforce POSIX ACLs on local files whether
59	  this protocol is available or not.
60
61	  This option enables support in your system's NFS server for the
62	  NFSv3 ACL protocol extension allowing NFS clients to manipulate
63	  POSIX ACLs on files exported by your system's NFS server.  NFS
64	  clients which support the Solaris NFSv3 ACL protocol can then
65	  access and modify ACLs on your NFS server.
66
67	  To store ACLs on your NFS server, you also need to enable ACL-
68	  related CONFIG options for your local file systems of choice.
69
70	  If unsure, say N.
71
72config NFSD_V4
73	bool "NFS server support for NFS version 4"
74	depends on NFSD && PROC_FS
75	select FS_POSIX_ACL
76	select SUNRPC_GSS
77	select CRYPTO
78	select CRYPTO_MD5
79	select CRYPTO_SHA256
80	select GRACE_PERIOD
81	select NFS_V4_2_SSC_HELPER if NFS_V4_2
82	help
83	  This option enables support in your system's NFS server for
84	  version 4 of the NFS protocol (RFC 3530).
85
86	  To export files using NFSv4, you need to install additional user
87	  space programs which can be found in the Linux nfs-utils package,
88	  available from http://linux-nfs.org/.
89
90	  If unsure, say N.
91
92config NFSD_PNFS
93	bool
94
95config NFSD_BLOCKLAYOUT
96	bool "NFSv4.1 server support for pNFS block layouts"
97	depends on NFSD_V4 && BLOCK
98	select NFSD_PNFS
99	select EXPORTFS_BLOCK_OPS
100	help
101	  This option enables support for the exporting pNFS block layouts
102	  in the kernel's NFS server. The pNFS block layout enables NFS
103	  clients to directly perform I/O to block devices accessible to both
104	  the server and the clients.  See RFC 5663 for more details.
105
106	  If unsure, say N.
107
108config NFSD_SCSILAYOUT
109	bool "NFSv4.1 server support for pNFS SCSI layouts"
110	depends on NFSD_V4 && BLOCK
111	select NFSD_PNFS
112	select EXPORTFS_BLOCK_OPS
113	help
114	  This option enables support for the exporting pNFS SCSI layouts
115	  in the kernel's NFS server. The pNFS SCSI layout enables NFS
116	  clients to directly perform I/O to SCSI devices accessible to both
117	  the server and the clients.  See draft-ietf-nfsv4-scsi-layout for
118	  more details.
119
120	  If unsure, say N.
121
122config NFSD_FLEXFILELAYOUT
123	bool "NFSv4.1 server support for pNFS Flex File layouts"
124	depends on NFSD_V4
125	select NFSD_PNFS
126	help
127	  This option enables support for the exporting pNFS Flex File
128	  layouts in the kernel's NFS server. The pNFS Flex File  layout
129	  enables NFS clients to directly perform I/O to NFSv3 devices
130	  accessible to both the server and the clients.  See
131	  draft-ietf-nfsv4-flex-files for more details.
132
133	  Warning, this server implements the bare minimum functionality
134	  to be a flex file server - it is for testing the client,
135	  not for use in production.
136
137	  If unsure, say N.
138
139config NFSD_V4_2_INTER_SSC
140	bool "NFSv4.2 inter server to server COPY"
141	depends on NFSD_V4 && NFS_V4_2
142	help
143	  This option enables support for NFSv4.2 inter server to
144	  server copy where the destination server calls the NFSv4.2
145	  client to read the data to copy from the source server.
146
147	  If unsure, say N.
148
149config NFSD_V4_SECURITY_LABEL
150	bool "Provide Security Label support for NFSv4 server"
151	depends on NFSD_V4 && SECURITY
152	help
153
154	Say Y here if you want enable fine-grained security label attribute
155	support for NFS version 4.  Security labels allow security modules like
156	SELinux and Smack to label files to facilitate enforcement of their policies.
157	Without this an NFSv4 mount will have the same label on each file.
158
159	If you do not wish to enable fine-grained security labels SELinux or
160	Smack policies on NFSv4 files, say N.
161