fs/nfsd/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 config 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
  34 config NFSD_V2_ACL
  35         bool
  36         depends on NFSD
  37
  38 config 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
  47 config 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
  70 config 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
  91 config NFSD_PNFS
  92         bool
  93
  94 config 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
 107 config 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
 122 config 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
 139 config NFSD_V4_2_INTER_SSC
 140         bool "NFSv4.2 inter server to server COPY"
 141         depends on NFSD_V4 && NFS_V4_1 && 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
 149 config 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.