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