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_ACL 39 bool "NFS server support for the NFSv3 ACL protocol extension" 40 depends on NFSD 41 select NFSD_V2_ACL 42 help 43 Solaris NFS servers support an auxiliary NFSv3 ACL protocol that 44 never became an official part of the NFS version 3 protocol. 45 This protocol extension allows applications on NFS clients to 46 manipulate POSIX Access Control Lists on files residing on NFS 47 servers. NFS servers enforce POSIX ACLs on local files whether 48 this protocol is available or not. 49 50 This option enables support in your system's NFS server for the 51 NFSv3 ACL protocol extension allowing NFS clients to manipulate 52 POSIX ACLs on files exported by your system's NFS server. NFS 53 clients which support the Solaris NFSv3 ACL protocol can then 54 access and modify ACLs on your NFS server. 55 56 To store ACLs on your NFS server, you also need to enable ACL- 57 related CONFIG options for your local file systems of choice. 58 59 If unsure, say N. 60 61config NFSD_V4 62 bool "NFS server support for NFS version 4" 63 depends on NFSD && PROC_FS 64 select FS_POSIX_ACL 65 select SUNRPC_GSS 66 select CRYPTO 67 select CRYPTO_MD5 68 select CRYPTO_SHA256 69 select GRACE_PERIOD 70 select NFS_V4_2_SSC_HELPER if NFS_V4_2 71 help 72 This option enables support in your system's NFS server for 73 version 4 of the NFS protocol (RFC 3530). 74 75 To export files using NFSv4, you need to install additional user 76 space programs which can be found in the Linux nfs-utils package, 77 available from http://linux-nfs.org/. 78 79 If unsure, say N. 80 81config NFSD_PNFS 82 bool 83 84config NFSD_BLOCKLAYOUT 85 bool "NFSv4.1 server support for pNFS block layouts" 86 depends on NFSD_V4 && BLOCK 87 select NFSD_PNFS 88 select EXPORTFS_BLOCK_OPS 89 help 90 This option enables support for the exporting pNFS block layouts 91 in the kernel's NFS server. The pNFS block layout enables NFS 92 clients to directly perform I/O to block devices accessible to both 93 the server and the clients. See RFC 5663 for more details. 94 95 If unsure, say N. 96 97config NFSD_SCSILAYOUT 98 bool "NFSv4.1 server support for pNFS SCSI layouts" 99 depends on NFSD_V4 && BLOCK 100 select NFSD_PNFS 101 select EXPORTFS_BLOCK_OPS 102 help 103 This option enables support for the exporting pNFS SCSI layouts 104 in the kernel's NFS server. The pNFS SCSI layout enables NFS 105 clients to directly perform I/O to SCSI devices accessible to both 106 the server and the clients. See draft-ietf-nfsv4-scsi-layout for 107 more details. 108 109 If unsure, say N. 110 111config NFSD_FLEXFILELAYOUT 112 bool "NFSv4.1 server support for pNFS Flex File layouts" 113 depends on NFSD_V4 114 select NFSD_PNFS 115 help 116 This option enables support for the exporting pNFS Flex File 117 layouts in the kernel's NFS server. The pNFS Flex File layout 118 enables NFS clients to directly perform I/O to NFSv3 devices 119 accessible to both the server and the clients. See 120 draft-ietf-nfsv4-flex-files for more details. 121 122 Warning, this server implements the bare minimum functionality 123 to be a flex file server - it is for testing the client, 124 not for use in production. 125 126 If unsure, say N. 127 128config NFSD_V4_2_INTER_SSC 129 bool "NFSv4.2 inter server to server COPY" 130 depends on NFSD_V4 && NFS_V4_2 131 help 132 This option enables support for NFSv4.2 inter server to 133 server copy where the destination server calls the NFSv4.2 134 client to read the data to copy from the source server. 135 136 If unsure, say N. 137 138config NFSD_V4_SECURITY_LABEL 139 bool "Provide Security Label support for NFSv4 server" 140 depends on NFSD_V4 && SECURITY 141 help 142 143 Say Y here if you want enable fine-grained security label attribute 144 support for NFS version 4. Security labels allow security modules like 145 SELinux and Smack to label files to facilitate enforcement of their policies. 146 Without this an NFSv4 mount will have the same label on each file. 147 148 If you do not wish to enable fine-grained security labels SELinux or 149 Smack policies on NFSv4 files, say N. 150