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         help
  68           This option enables support for version 4 of the NFS protocol
  69           (RFC 3530) in the kernel's NFS client.
  70
  71           To mount NFS servers using NFSv4, you also need to install user
  72           space programs which can be found in the Linux nfs-utils package,
  73           available from http://linux-nfs.org/.
  74
  75           If unsure, say Y.
  76
  77 config NFS_V4_1
  78         bool "NFS client support for NFSv4.1 (EXPERIMENTAL)"
  79         depends on NFS_FS && NFS_V4 && EXPERIMENTAL
  80         select SUNRPC_BACKCHANNEL
  81         select PNFS_FILE_LAYOUT
  82         help
  83           This option enables support for minor version 1 of the NFSv4 protocol
  84           (RFC 5661) in the kernel's NFS client.
  85
  86           If unsure, say N.
  87
  88 config PNFS_FILE_LAYOUT
  89         tristate
  90
  91 config PNFS_BLOCK
  92         tristate
  93         depends on NFS_FS && NFS_V4_1 && BLK_DEV_DM
  94         default m
  95
  96 config PNFS_OBJLAYOUT
  97         tristate
  98         depends on NFS_FS && NFS_V4_1 && SCSI_OSD_ULD
  99         default m
 100
 101 config ROOT_NFS
 102         bool "Root file system on NFS"
 103         depends on NFS_FS=y && IP_PNP
 104         help
 105           If you want your system to mount its root file system via NFS,
 106           choose Y here.  This is common practice for managing systems
 107           without local permanent storage.  For details, read
 108           <file:Documentation/filesystems/nfs/nfsroot.txt>.
 109
 110           Most people say N here.
 111
 112 config NFS_FSCACHE
 113         bool "Provide NFS client caching support"
 114         depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
 115         help
 116           Say Y here if you want NFS data to be cached locally on disc through
 117           the general filesystem cache manager
 118
 119 config NFS_USE_LEGACY_DNS
 120         bool "Use the legacy NFS DNS resolver"
 121         depends on NFS_V4
 122         help
 123           The kernel now provides a method for translating a host name into an
 124           IP address.  Select Y here if you would rather use your own DNS
 125           resolver script.
 126
 127           If unsure, say N
 128
 129 config NFS_USE_KERNEL_DNS
 130         bool
 131         depends on NFS_V4 && !NFS_USE_LEGACY_DNS
 132         select DNS_RESOLVER
 133         select KEYS
 134         default y
 135
 136 config NFS_USE_NEW_IDMAPPER
 137         bool "Use the new idmapper upcall routine"
 138         depends on NFS_V4 && KEYS
 139         help
 140           Say Y here if you want NFS to use the new idmapper upcall functions.
 141           You will need /sbin/request-key (usually provided by the keyutils
 142           package).  For details, read
 143           <file:Documentation/filesystems/nfs/idmapper.txt>.
 144
 145           If you are unsure, say N.