fs/nfs/Kconfig

   1 config NFS_FS
   2         tristate "NFS client support"
   3         depends on INET && FILE_LOCKING
   4         select LOCKD
   5         select SUNRPC
   6         select NFS_ACL_SUPPORT if NFS_V3_ACL
   7         help
   8           Choose Y here if you want to access files residing on other
   9           computers using Sun's Network File System protocol.  To compile
  10           this file system support as a module, choose M here: the module
  11           will be called nfs.
  12
  13           To mount file systems exported by NFS servers, you also need to
  14           install the user space mount.nfs command which can be found in
  15           the Linux nfs-utils package, available from http://linux-nfs.org/.
  16           Information about using the mount command is available in the
  17           mount(8) man page.  More detail about the Linux NFS client
  18           implementation is available via the nfs(5) man page.
  19
  20           Below you can choose which versions of the NFS protocol are
  21           available in the kernel to mount NFS servers.  Support for NFS
  22           version 2 (RFC 1094) is always available when NFS_FS is selected.
  23
  24           To configure a system which mounts its root file system via NFS
  25           at boot time, say Y here, select "Kernel level IP
  26           autoconfiguration" in the NETWORK menu, and select "Root file
  27           system on NFS" below.  You cannot compile this file system as a
  28           module in this case.
  29
  30           If unsure, say N.
  31
  32 config NFS_V2
  33         tristate "NFS client support for NFS version 2"
  34         depends on NFS_FS
  35         default y
  36         help
  37           This option enables support for version 2 of the NFS protocol
  38           (RFC 1094) in the kernel's NFS client.
  39
  40           If unsure, say Y.
  41
  42 config NFS_V3
  43         tristate "NFS client support for NFS version 3"
  44         depends on NFS_FS
  45         default y
  46         help
  47           This option enables support for version 3 of the NFS protocol
  48           (RFC 1813) in the kernel's NFS client.
  49
  50           If unsure, say Y.
  51
  52 config NFS_V3_ACL
  53         bool "NFS client support for the NFSv3 ACL protocol extension"
  54         depends on NFS_V3
  55         help
  56           Some NFS servers support an auxiliary NFSv3 ACL protocol that
  57           Sun added to Solaris but never became an official part of the
  58           NFS version 3 protocol.  This protocol extension allows
  59           applications on NFS clients to manipulate POSIX Access Control
  60           Lists on files residing on NFS servers.  NFS servers enforce
  61           ACLs on local files whether this protocol is available or not.
  62
  63           Choose Y here if your NFS server supports the Solaris NFSv3 ACL
  64           protocol extension and you want your NFS client to allow
  65           applications to access and modify ACLs on files on the server.
  66
  67           Most NFS servers don't support the Solaris NFSv3 ACL protocol
  68           extension.  You can choose N here or specify the "noacl" mount
  69           option to prevent your NFS client from trying to use the NFSv3
  70           ACL protocol.
  71
  72           If unsure, say N.
  73
  74 config NFS_V4
  75         tristate "NFS client support for NFS version 4"
  76         depends on NFS_FS
  77         select SUNRPC_GSS
  78         select KEYS
  79         help
  80           This option enables support for version 4 of the NFS protocol
  81           (RFC 3530) in the kernel's NFS client.
  82
  83           To mount NFS servers using NFSv4, you also need to install 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 Y.
  88
  89 config NFS_SWAP
  90         bool "Provide swap over NFS support"
  91         default n
  92         depends on NFS_FS
  93         select SUNRPC_SWAP
  94         help
  95           This option enables swapon to work on files located on NFS mounts.
  96
  97 config NFS_V4_1
  98         bool "NFS client support for NFSv4.1"
  99         depends on NFS_V4
 100         select SUNRPC_BACKCHANNEL
 101         help
 102           This option enables support for minor version 1 of the NFSv4 protocol
 103           (RFC 5661) in the kernel's NFS client.
 104
 105           If unsure, say N.
 106
 107 config PNFS_FILE_LAYOUT
 108         tristate
 109         depends on NFS_V4_1
 110         default m
 111
 112 config PNFS_BLOCK
 113         tristate
 114         depends on NFS_V4_1 && BLK_DEV_DM
 115         default m
 116
 117 config PNFS_OBJLAYOUT
 118         tristate
 119         depends on NFS_V4_1 && SCSI_OSD_ULD
 120         default m
 121
 122 config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
 123         string "NFSv4.1 Implementation ID Domain"
 124         depends on NFS_V4_1
 125         default "kernel.org"
 126         help
 127           This option defines the domain portion of the implementation ID that
 128           may be sent in the NFS exchange_id operation.  The value must be in
 129           the format of a DNS domain name and should be set to the DNS domain
 130           name of the distribution.
 131           If the NFS client is unchanged from the upstream kernel, this
 132           option should be set to the default "kernel.org".
 133
 134 config ROOT_NFS
 135         bool "Root file system on NFS"
 136         depends on NFS_FS=y && IP_PNP
 137         help
 138           If you want your system to mount its root file system via NFS,
 139           choose Y here.  This is common practice for managing systems
 140           without local permanent storage.  For details, read
 141           <file:Documentation/filesystems/nfs/nfsroot.txt>.
 142
 143           Most people say N here.
 144
 145 config NFS_FSCACHE
 146         bool "Provide NFS client caching support"
 147         depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
 148         help
 149           Say Y here if you want NFS data to be cached locally on disc through
 150           the general filesystem cache manager
 151
 152 config NFS_USE_LEGACY_DNS
 153         bool "Use the legacy NFS DNS resolver"
 154         depends on NFS_V4
 155         help
 156           The kernel now provides a method for translating a host name into an
 157           IP address.  Select Y here if you would rather use your own DNS
 158           resolver script.
 159
 160           If unsure, say N
 161
 162 config NFS_USE_KERNEL_DNS
 163         bool
 164         depends on NFS_V4 && !NFS_USE_LEGACY_DNS
 165         select DNS_RESOLVER
 166         default y
 167
 168 config NFS_DEBUG
 169         bool
 170         depends on NFS_FS && SUNRPC_DEBUG
 171         select CRC32
 172         default y