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_MD5 77 select CRYPTO_SHA256 78 select GRACE_PERIOD 79 help 80 This option enables support in your system's NFS server for 81 version 4 of the NFS protocol (RFC 3530). 82 83 To export files using NFSv4, you need to install additional user 84 space programs which can be found in the Linux nfs-utils package, 85 available from http://linux-nfs.org/. 86 87 If unsure, say N. 88 89config NFSD_PNFS 90 bool 91 92config NFSD_BLOCKLAYOUT 93 bool "NFSv4.1 server support for pNFS block layouts" 94 depends on NFSD_V4 && BLOCK 95 select NFSD_PNFS 96 select EXPORTFS_BLOCK_OPS 97 help 98 This option enables support for the exporting pNFS block layouts 99 in the kernel's NFS server. The pNFS block layout enables NFS 100 clients to directly perform I/O to block devices accesible to both 101 the server and the clients. See RFC 5663 for more details. 102 103 If unsure, say N. 104 105config NFSD_SCSILAYOUT 106 bool "NFSv4.1 server support for pNFS SCSI layouts" 107 depends on NFSD_V4 && BLOCK 108 select NFSD_PNFS 109 select EXPORTFS_BLOCK_OPS 110 select BLK_SCSI_REQUEST 111 help 112 This option enables support for the exporting pNFS SCSI layouts 113 in the kernel's NFS server. The pNFS SCSI layout enables NFS 114 clients to directly perform I/O to SCSI devices accesible to both 115 the server and the clients. See draft-ietf-nfsv4-scsi-layout for 116 more details. 117 118 If unsure, say N. 119 120config NFSD_FLEXFILELAYOUT 121 bool "NFSv4.1 server support for pNFS Flex File layouts" 122 depends on NFSD_V4 123 select NFSD_PNFS 124 help 125 This option enables support for the exporting pNFS Flex File 126 layouts in the kernel's NFS server. The pNFS Flex File layout 127 enables NFS clients to directly perform I/O to NFSv3 devices 128 accesible to both the server and the clients. See 129 draft-ietf-nfsv4-flex-files for more details. 130 131 Warning, this server implements the bare minimum functionality 132 to be a flex file server - it is for testing the client, 133 not for use in production. 134 135 If unsure, say N. 136 137config NFSD_V4_2_INTER_SSC 138 bool "NFSv4.2 inter server to server COPY" 139 depends on NFSD_V4 && NFS_V4_1 && NFS_V4_2 140 help 141 This option enables support for NFSv4.2 inter server to 142 server copy where the destination server calls the NFSv4.2 143 client to read the data to copy from the source server. 144 145 If unsure, say N. 146 147config NFSD_V4_SECURITY_LABEL 148 bool "Provide Security Label support for NFSv4 server" 149 depends on NFSD_V4 && SECURITY 150 help 151 152 Say Y here if you want enable fine-grained security label attribute 153 support for NFS version 4. Security labels allow security modules like 154 SELinux and Smack to label files to facilitate enforcement of their policies. 155 Without this an NFSv4 mount will have the same label on each file. 156 157 If you do not wish to enable fine-grained security labels SELinux or 158 Smack policies on NFSv4 files, say N. 159