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 select BLK_SCSI_REQUEST 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