1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 config NFSD 2 config NFSD
3 tristate "NFS server support" 3 tristate "NFS server support"
4 depends on INET 4 depends on INET
5 depends on FILE_LOCKING 5 depends on FILE_LOCKING
6 depends on FSNOTIFY 6 depends on FSNOTIFY
7 select LOCKD 7 select LOCKD
8 select SUNRPC 8 select SUNRPC
9 select EXPORTFS 9 select EXPORTFS
10 select NFS_COMMON 10 select NFS_COMMON
11 select NFS_ACL_SUPPORT if NFSD_V2_ACL 11 select NFS_ACL_SUPPORT if NFSD_V2_ACL
12 select NFS_ACL_SUPPORT if NFSD_V3_ACL 12 select NFS_ACL_SUPPORT if NFSD_V3_ACL
13 depends on MULTIUSER 13 depends on MULTIUSER
14 help 14 help
15 Choose Y here if you want to allow o 15 Choose Y here if you want to allow other computers to access
16 files residing on this system using 16 files residing on this system using Sun's Network File System
17 protocol. To compile the NFS server 17 protocol. To compile the NFS server support as a module,
18 choose M here: the module will be ca 18 choose M here: the module will be called nfsd.
19 19
20 You may choose to use a user-space N 20 You may choose to use a user-space NFS server instead, in which
21 case you can choose N here. 21 case you can choose N here.
22 22
23 To export local file systems using N 23 To export local file systems using NFS, you also need to install
24 user space programs which can be fou 24 user space programs which can be found in the Linux nfs-utils
25 package, available from http://linux 25 package, available from http://linux-nfs.org/. More detail about
26 the Linux NFS server implementation 26 the Linux NFS server implementation is available via the
27 exports(5) man page. 27 exports(5) man page.
28 28
29 Below you can choose which versions 29 Below you can choose which versions of the NFS protocol are
30 available to clients mounting the NF 30 available to clients mounting the NFS server on this system.
31 Support for NFS version 3 (RFC 1813) 31 Support for NFS version 3 (RFC 1813) is always available when
32 CONFIG_NFSD is selected. 32 CONFIG_NFSD is selected.
33 33
34 If unsure, say N. 34 If unsure, say N.
35 35
36 config NFSD_V2 36 config NFSD_V2
37 bool "NFS server support for NFS versi 37 bool "NFS server support for NFS version 2 (DEPRECATED)"
38 depends on NFSD 38 depends on NFSD
39 default n 39 default n
40 help 40 help
41 NFSv2 (RFC 1094) was the first publi 41 NFSv2 (RFC 1094) was the first publicly-released version of NFS.
42 Unless you are hosting ancient (1990 42 Unless you are hosting ancient (1990's era) NFS clients, you don't
43 need this. 43 need this.
44 44
45 If unsure, say N. 45 If unsure, say N.
46 46
47 config NFSD_V2_ACL 47 config NFSD_V2_ACL
48 bool "NFS server support for the NFSv2 48 bool "NFS server support for the NFSv2 ACL protocol extension"
49 depends on NFSD_V2 49 depends on NFSD_V2
50 50
51 config NFSD_V3_ACL 51 config NFSD_V3_ACL
52 bool "NFS server support for the NFSv3 52 bool "NFS server support for the NFSv3 ACL protocol extension"
53 depends on NFSD 53 depends on NFSD
54 help 54 help
55 Solaris NFS servers support an auxil 55 Solaris NFS servers support an auxiliary NFSv3 ACL protocol that
56 never became an official part of the 56 never became an official part of the NFS version 3 protocol.
57 This protocol extension allows appli 57 This protocol extension allows applications on NFS clients to
58 manipulate POSIX Access Control List 58 manipulate POSIX Access Control Lists on files residing on NFS
59 servers. NFS servers enforce POSIX 59 servers. NFS servers enforce POSIX ACLs on local files whether
60 this protocol is available or not. 60 this protocol is available or not.
61 61
62 This option enables support in your 62 This option enables support in your system's NFS server for the
63 NFSv3 ACL protocol extension allowin 63 NFSv3 ACL protocol extension allowing NFS clients to manipulate
64 POSIX ACLs on files exported by your 64 POSIX ACLs on files exported by your system's NFS server. NFS
65 clients which support the Solaris NF 65 clients which support the Solaris NFSv3 ACL protocol can then
66 access and modify ACLs on your NFS s 66 access and modify ACLs on your NFS server.
67 67
68 To store ACLs on your NFS server, yo 68 To store ACLs on your NFS server, you also need to enable ACL-
69 related CONFIG options for your loca 69 related CONFIG options for your local file systems of choice.
70 70
71 If unsure, say N. 71 If unsure, say N.
72 72
73 config NFSD_V4 73 config NFSD_V4
74 bool "NFS server support for NFS versi 74 bool "NFS server support for NFS version 4"
75 depends on NFSD && PROC_FS 75 depends on NFSD && PROC_FS
76 select FS_POSIX_ACL 76 select FS_POSIX_ACL
77 select RPCSEC_GSS_KRB5 77 select RPCSEC_GSS_KRB5
78 select CRYPTO 78 select CRYPTO
79 select CRYPTO_MD5 79 select CRYPTO_MD5
80 select CRYPTO_SHA256 80 select CRYPTO_SHA256
81 select GRACE_PERIOD 81 select GRACE_PERIOD
82 select NFS_V4_2_SSC_HELPER if NFS_V4_2 82 select NFS_V4_2_SSC_HELPER if NFS_V4_2
83 help 83 help
84 This option enables support in your 84 This option enables support in your system's NFS server for
85 version 4 of the NFS protocol (RFC 3 85 version 4 of the NFS protocol (RFC 3530).
86 86
87 To export files using NFSv4, you nee 87 To export files using NFSv4, you need to install additional user
88 space programs which can be found in 88 space programs which can be found in the Linux nfs-utils package,
89 available from http://linux-nfs.org/ 89 available from http://linux-nfs.org/.
90 90
91 If unsure, say N. 91 If unsure, say N.
92 92
93 config NFSD_PNFS 93 config NFSD_PNFS
94 bool 94 bool
95 95
96 config NFSD_BLOCKLAYOUT 96 config NFSD_BLOCKLAYOUT
97 bool "NFSv4.1 server support for pNFS 97 bool "NFSv4.1 server support for pNFS block layouts"
98 depends on NFSD_V4 && BLOCK 98 depends on NFSD_V4 && BLOCK
99 select NFSD_PNFS 99 select NFSD_PNFS
100 select EXPORTFS_BLOCK_OPS 100 select EXPORTFS_BLOCK_OPS
101 help 101 help
102 This option enables support for the 102 This option enables support for the exporting pNFS block layouts
103 in the kernel's NFS server. The pNFS 103 in the kernel's NFS server. The pNFS block layout enables NFS
104 clients to directly perform I/O to b 104 clients to directly perform I/O to block devices accessible to both
105 the server and the clients. See RFC 105 the server and the clients. See RFC 5663 for more details.
106 106
107 If unsure, say N. 107 If unsure, say N.
108 108
109 config NFSD_SCSILAYOUT 109 config NFSD_SCSILAYOUT
110 bool "NFSv4.1 server support for pNFS 110 bool "NFSv4.1 server support for pNFS SCSI layouts"
111 depends on NFSD_V4 && BLOCK 111 depends on NFSD_V4 && BLOCK
112 select NFSD_PNFS 112 select NFSD_PNFS
113 select EXPORTFS_BLOCK_OPS 113 select EXPORTFS_BLOCK_OPS
114 help 114 help
115 This option enables support for the 115 This option enables support for the exporting pNFS SCSI layouts
116 in the kernel's NFS server. The pNFS 116 in the kernel's NFS server. The pNFS SCSI layout enables NFS
117 clients to directly perform I/O to S 117 clients to directly perform I/O to SCSI devices accessible to both
118 the server and the clients. See dra 118 the server and the clients. See draft-ietf-nfsv4-scsi-layout for
119 more details. 119 more details.
120 120
121 If unsure, say N. 121 If unsure, say N.
122 122
123 config NFSD_FLEXFILELAYOUT 123 config NFSD_FLEXFILELAYOUT
124 bool "NFSv4.1 server support for pNFS 124 bool "NFSv4.1 server support for pNFS Flex File layouts"
125 depends on NFSD_V4 125 depends on NFSD_V4
126 select NFSD_PNFS 126 select NFSD_PNFS
127 help 127 help
128 This option enables support for the 128 This option enables support for the exporting pNFS Flex File
129 layouts in the kernel's NFS server. 129 layouts in the kernel's NFS server. The pNFS Flex File layout
130 enables NFS clients to directly perf 130 enables NFS clients to directly perform I/O to NFSv3 devices
131 accessible to both the server and th 131 accessible to both the server and the clients. See
132 draft-ietf-nfsv4-flex-files for more 132 draft-ietf-nfsv4-flex-files for more details.
133 133
134 Warning, this server implements the 134 Warning, this server implements the bare minimum functionality
135 to be a flex file server - it is for 135 to be a flex file server - it is for testing the client,
136 not for use in production. 136 not for use in production.
137 137
138 If unsure, say N. 138 If unsure, say N.
139 139
140 config NFSD_V4_2_INTER_SSC 140 config NFSD_V4_2_INTER_SSC
141 bool "NFSv4.2 inter server to server C 141 bool "NFSv4.2 inter server to server COPY"
142 depends on NFSD_V4 && NFS_V4_2 142 depends on NFSD_V4 && NFS_V4_2
143 help 143 help
144 This option enables support for NFSv 144 This option enables support for NFSv4.2 inter server to
145 server copy where the destination se 145 server copy where the destination server calls the NFSv4.2
146 client to read the data to copy from 146 client to read the data to copy from the source server.
147 147
148 If unsure, say N. 148 If unsure, say N.
149 149
150 config NFSD_V4_SECURITY_LABEL 150 config NFSD_V4_SECURITY_LABEL
151 bool "Provide Security Label support f 151 bool "Provide Security Label support for NFSv4 server"
152 depends on NFSD_V4 && SECURITY 152 depends on NFSD_V4 && SECURITY
153 help 153 help
154 154
155 Say Y here if you want enable fine-gra 155 Say Y here if you want enable fine-grained security label attribute
156 support for NFS version 4. Security l 156 support for NFS version 4. Security labels allow security modules like
157 SELinux and Smack to label files to fa 157 SELinux and Smack to label files to facilitate enforcement of their policies.
158 Without this an NFSv4 mount will have 158 Without this an NFSv4 mount will have the same label on each file.
159 159
160 If you do not wish to enable fine-grai 160 If you do not wish to enable fine-grained security labels SELinux or
161 Smack policies on NFSv4 files, say N. 161 Smack policies on NFSv4 files, say N.
162 162
163 config NFSD_LEGACY_CLIENT_TRACKING 163 config NFSD_LEGACY_CLIENT_TRACKING
164 bool "Support legacy NFSv4 client trac 164 bool "Support legacy NFSv4 client tracking methods (DEPRECATED)"
165 depends on NFSD_V4 165 depends on NFSD_V4
166 default y 166 default y
167 help 167 help
168 The NFSv4 server needs to store a sm 168 The NFSv4 server needs to store a small amount of information on
169 stable storage in order to handle st 169 stable storage in order to handle state recovery after reboot. Most
170 modern deployments upcall to a userl 170 modern deployments upcall to a userland daemon for this (nfsdcld),
171 but older NFS servers may store info 171 but older NFS servers may store information directly in a
172 recoverydir, or spawn a process dire 172 recoverydir, or spawn a process directly using a usermodehelper
173 upcall. 173 upcall.
174 174
175 These legacy client tracking methods 175 These legacy client tracking methods have proven to be probelmatic
176 and will be removed in the future. S 176 and will be removed in the future. Say Y here if you need support
177 for them in the interim. 177 for them in the interim.
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