fs/nfs/Kconfig

   1 config NFS_FS
   2         tristate "NFS client support"
   3         depends on INET && FILE_LOCKING && MULTIUSER
   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 NFS_V4_2
 108         bool "NFS client support for NFSv4.2"
 109         depends on NFS_V4_1
 110         help
 111           This option enables support for minor version 2 of the NFSv4 protocol
 112           in the kernel's NFS client.
 113
 114           If unsure, say N.
 115
 116 config PNFS_FILE_LAYOUT
 117         tristate
 118         depends on NFS_V4_1
 119         default NFS_V4
 120
 121 config PNFS_BLOCK
 122         tristate
 123         depends on NFS_V4_1 && BLK_DEV_DM
 124         default NFS_V4
 125
 126 config PNFS_FLEXFILE_LAYOUT
 127         tristate
 128         depends on NFS_V4_1 && NFS_V3
 129         default m
 130
 131 config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
 132         string "NFSv4.1 Implementation ID Domain"
 133         depends on NFS_V4_1
 134         default "kernel.org"
 135         help
 136           This option defines the domain portion of the implementation ID that
 137           may be sent in the NFS exchange_id operation.  The value must be in
 138           the format of a DNS domain name and should be set to the DNS domain
 139           name of the distribution.
 140           If the NFS client is unchanged from the upstream kernel, this
 141           option should be set to the default "kernel.org".
 142
 143 config NFS_V4_1_MIGRATION
 144         bool "NFSv4.1 client support for migration"
 145         depends on NFS_V4_1
 146         default n
 147         help
 148           This option makes the NFS client advertise to NFSv4.1 servers that
 149           it can support NFSv4 migration.
 150
 151           The NFSv4.1 pieces of the Linux NFSv4 migration implementation are
 152           still experimental.  If you are not an NFSv4 developer, say N here.
 153
 154 config NFS_V4_SECURITY_LABEL
 155         bool
 156         depends on NFS_V4_2 && SECURITY
 157         default y
 158
 159 config ROOT_NFS
 160         bool "Root file system on NFS"
 161         depends on NFS_FS=y && IP_PNP
 162         help
 163           If you want your system to mount its root file system via NFS,
 164           choose Y here.  This is common practice for managing systems
 165           without local permanent storage.  For details, read
 166           <file:Documentation/filesystems/nfs/nfsroot.txt>.
 167
 168           Most people say N here.
 169
 170 config NFS_FSCACHE
 171         bool "Provide NFS client caching support"
 172         depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
 173         help
 174           Say Y here if you want NFS data to be cached locally on disc through
 175           the general filesystem cache manager
 176
 177 config NFS_USE_LEGACY_DNS
 178         bool "Use the legacy NFS DNS resolver"
 179         depends on NFS_V4
 180         help
 181           The kernel now provides a method for translating a host name into an
 182           IP address.  Select Y here if you would rather use your own DNS
 183           resolver script.
 184
 185           If unsure, say N
 186
 187 config NFS_USE_KERNEL_DNS
 188         bool
 189         depends on NFS_V4 && !NFS_USE_LEGACY_DNS
 190         select DNS_RESOLVER
 191         default y
 192
 193 config NFS_DEBUG
 194         bool
 195         depends on NFS_FS && SUNRPC_DEBUG
 196         select CRC32
 197         default y