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