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_V3
  33         bool "NFS client support for NFS version 3"
  34         depends on NFS_FS
  35         help
  36           This option enables support for version 3 of the NFS protocol
  37           (RFC 1813) in the kernel's NFS client.
  38
  39           If unsure, say Y.
  40
  41 config NFS_V3_ACL
  42         bool "NFS client support for the NFSv3 ACL protocol extension"
  43         depends on NFS_V3
  44         help
  45           Some NFS servers support an auxiliary NFSv3 ACL protocol that
  46           Sun added to Solaris but never became an official part of the
  47           NFS version 3 protocol.  This protocol extension allows
  48           applications on NFS clients to manipulate POSIX Access Control
  49           Lists on files residing on NFS servers.  NFS servers enforce
  50           ACLs on local files whether this protocol is available or not.
  51
  52           Choose Y here if your NFS server supports the Solaris NFSv3 ACL
  53           protocol extension and you want your NFS client to allow
  54           applications to access and modify ACLs on files on the server.
  55
  56           Most NFS servers don't support the Solaris NFSv3 ACL protocol
  57           extension.  You can choose N here or specify the "noacl" mount
  58           option to prevent your NFS client from trying to use the NFSv3
  59           ACL protocol.
  60
  61           If unsure, say N.
  62
  63 config NFS_V4
  64         bool "NFS client support for NFS version 4"
  65         depends on NFS_FS
  66         select SUNRPC_GSS
  67         select KEYS
  68         help
  69           This option enables support for version 4 of the NFS protocol
  70           (RFC 3530) in the kernel's NFS client.
  71
  72           To mount NFS servers using NFSv4, you also need to install user
  73           space programs which can be found in the Linux nfs-utils package,
  74           available from http://linux-nfs.org/.
  75
  76           If unsure, say Y.
  77
  78 config NFS_V4_1
  79         bool "NFS client support for NFSv4.1 (EXPERIMENTAL)"
  80         depends on NFS_FS && NFS_V4 && EXPERIMENTAL
  81         select SUNRPC_BACKCHANNEL
  82         select PNFS_FILE_LAYOUT
  83         help
  84           This option enables support for minor version 1 of the NFSv4 protocol
  85           (RFC 5661) in the kernel's NFS client.
  86
  87           If unsure, say N.
  88
  89 config PNFS_FILE_LAYOUT
  90         tristate
  91
  92 config PNFS_BLOCK
  93         tristate
  94         depends on NFS_FS && NFS_V4_1 && BLK_DEV_DM
  95         default m
  96
  97 config PNFS_OBJLAYOUT
  98         tristate
  99         depends on NFS_FS && NFS_V4_1 && SCSI_OSD_ULD
 100         default m
 101
 102 config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
 103         string "NFSv4.1 Implementation ID Domain"
 104         depends on NFS_V4_1
 105         default "kernel.org"
 106         help
 107           This option defines the domain portion of the implementation ID that
 108           may be sent in the NFS exchange_id operation.  The value must be in
 109           the format of a DNS domain name and should be set to the DNS domain
 110           name of the distribution.
 111           If the NFS client is unchanged from the upstream kernel, this
 112           option should be set to the default "kernel.org".
 113
 114 config ROOT_NFS
 115         bool "Root file system on NFS"
 116         depends on NFS_FS=y && IP_PNP
 117         help
 118           If you want your system to mount its root file system via NFS,
 119           choose Y here.  This is common practice for managing systems
 120           without local permanent storage.  For details, read
 121           <file:Documentation/filesystems/nfs/nfsroot.txt>.
 122
 123           Most people say N here.
 124
 125 config NFS_FSCACHE
 126         bool "Provide NFS client caching support"
 127         depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
 128         help
 129           Say Y here if you want NFS data to be cached locally on disc through
 130           the general filesystem cache manager
 131
 132 config NFS_USE_LEGACY_DNS
 133         bool "Use the legacy NFS DNS resolver"
 134         depends on NFS_V4
 135         help
 136           The kernel now provides a method for translating a host name into an
 137           IP address.  Select Y here if you would rather use your own DNS
 138           resolver script.
 139
 140           If unsure, say N
 141
 142 config NFS_USE_KERNEL_DNS
 143         bool
 144         depends on NFS_V4 && !NFS_USE_LEGACY_DNS
 145         select DNS_RESOLVER
 146         default y
 147
 148 config NFS_DEBUG
 149         bool
 150         depends on NFS_FS && SUNRPC_DEBUG
 151         select CRC32
 152         default y